CN210340645U - Sludge recycling treatment system - Google Patents

Abstract

The utility model provides a sludge recycling treatment system, which comprises a pretreatment device, a flash tank and a recycling device; the flash tank is positioned between the pretreatment equipment and the recycling equipment, and the flash tank is communicated with the pretreatment equipment and the recycling equipment through conveying equipment respectively; the flash tank includes buffer and the flash zone that is located the buffer top, is provided with adsorption equipment in the buffer, and adsorption equipment is arranged in adsorbing the heavy metal in the mud in the flash tank. Therefore, the adsorption device is arranged in the buffer area of the flash tank, liquid in the sludge can be quickly gasified due to the reduction of pressure in the flash process of the sludge in the flash tank, the sludge is stirred by the quickly gasified steam, the sludge is ensured to be fully contacted with the adsorption device, heavy metals in the sludge are fully adsorbed by the adsorption device, the heavy metals in the sludge are effectively removed, and the secondary pollution of the heavy metals to the environment is avoided; the resource utilization rate of the sludge is improved.

Description

A sludge resource treatment system

technical field

The utility model relates to the technical field of sludge treatment, in particular to a sludge resource treatment system.

Background technique

With the continuous acceleration of my country's urbanization process and the comprehensive coverage of urban and rural sewage treatment facilities, the total annual output of municipal sludge is increasing. It is estimated that by 2020, the annual output of municipal sludge in my country will reach 60 million to 90 million tons. At present, there is a serious phenomenon of "heavy water and light mud" in the construction of sewage treatment plants in my country, that is, the focus on sewage treatment, but the sludge treatment rate is low; in 2016, the national sludge treatment rate was only 33%, and most sewage treatment plants have The sludge treatment process still stays in the traditional modulation and dehydration mode, and it is difficult to achieve the stabilization treatment of the sludge. The unstabilized sludge contains perishable organic matter, odorous substances, pathogens and heavy metals, etc., which is easy to cause secondary pollution to the environment. Pollution.

In view of the problem that unstabilized sludge is likely to cause secondary pollution, the disposal methods of sludge in related technologies mainly include the following: 1) Sanitary landfill, 2) Aerobic composting, 3) Anaerobic consumption, 4 ) sludge incineration, 5) land use and other treatment methods.

Although these treatment methods can solve the problem of secondary pollution of sludge to a certain extent, there are still some other problems, such as:

1) Sanitary landfill: Partial degradation of organic matter can be achieved; however, it covers a large area and has a long cycle. With the continuous increase in the amount of sludge, more land needs to be added for landfill, and the leachate generated at the same time still needs to be treated. It is easy to cause secondary pollution to the environment. According to the current environmental standards, the residue after landfill needs to be excavated for secondary treatment.

2) Aerobic composting: Sludge can be stabilized, kill pathogenic bacteria, and the investment cost is low; however, it needs to invest a lot of auxiliary materials, there is odor problem, the cycle is long, the area is large, and the biomass in the sludge is not reasonably utilized , the product quality is low.

3) Anaerobic digestion: It has a high degradation rate of organic matter (40-60%), which can significantly reduce the volume of sludge, and at the same time, it can kill pathogenic bacteria in a high temperature environment, and achieve harmless sludge. Oxygen composting does not require ventilation, saves energy consumption, and generates biogas for energy supply; however, it has many equipment, complex processes, large initial investment, and the system is greatly affected by the environment, unstable and unsustainable.

4) Sludge incineration: It can effectively reduce the amount of sludge and make it harmless; the investment and operation cost is high, the organic matter is not effectively utilized, the fly ash produced by incineration is hazardous waste, other exhaust gas needs to be treated, and the residue after incineration remains. It needs to be landfilled; although it can be used for incineration for power generation, it can realize resource utilization, but the investment cost is high, the production capacity is unstable, and the profit is unsustainable, which requires national financial support.

5) Land use: It is another main disposal method of sludge in my country. It makes full use of its organic matter and uses it as fertilizer for crops, pastures, nutrient soil for woodland and landscaping, sandy wasteland, saline-alkali land, and matrix soil conditioner for abandoned mining areas. . However, because the sludge contains a small amount of heavy metals and persistent pollutants, the safety of sludge land use has been questioned.

6) Others: According to the direction of resource utilization, sludge is also used to make bricks and ceramsite. However, due to the high content of organic matter in the sludge, the mechanical strength of the finished product is poor.

SUMMARY OF THE INVENTION

The utility model provides a sludge resource treatment system, which solves the problems of low sludge resource utilization rate that heavy metals in the sludge easily cause secondary pollution to the environment after sludge treatment in the related art.

In order to achieve the above purpose, the present utility model provides a sludge recycling treatment system, which includes a pretreatment device, a flash tank and a recycling device; wherein,

The flash tank is located between the pretreatment equipment and the recycling equipment, and the flash tank is communicated with the pretreatment equipment and the recycling equipment through conveying equipment respectively;

The flash tank includes a buffer zone and a flash zone above the buffer zone, and an adsorption device is arranged in the buffer zone, and the adsorption device is used for adsorbing heavy metals in the sludge in the flash tank.

In an optional mode of the present invention, the adsorption device includes an activated carbon adsorption device, the activated carbon adsorption device and the flash tank are arranged coaxially, and the side wall of the adsorption device is connected to the flash tank. The inner sidewall of the detachable connection;

The activated carbon adsorption device includes at least one activated carbon sponge rod, and the activated carbon sponge rod is arranged along the axial direction of the flash tank.

In an optional mode of the present invention, the pretreatment equipment includes a conditioning preheating box, the conditioning preheating box is connected to a heating device, and the conditioning preheating box is used for preheating the sludge. Heat; the regulating preheating box has a double-layer structure, and a vacuum structure is formed between the inner wall and the outer wall of the regulating preheating box, so that the regulating preheating box can keep the sludge warm.

In an optional mode of the present invention, the pretreatment equipment further includes a low temperature hydrolysis reaction kettle, the low temperature hydrolysis reaction kettle is communicated with the adjustment preheating box, and the low temperature hydrolysis reaction kettle is connected with the supply The thermal device is in communication; the low-temperature hydrolysis reactor is used to perform low-temperature hydrolysis reaction on the sludge at a preset temperature.

In an optional mode of the present invention, the resource treatment equipment includes a mud-water separation device, and the mud-water separation device is used to separate the mud-water from the flash-treated sludge in the flash tank.

In an optional mode of the present invention, the resource treatment equipment further includes a first blending tank, and the first blending tank is used to mix the dried sludge separated by the mud-water separation device with the soil blend , to prepare soil amendments.

In an optional mode of the present invention, the resource treatment equipment further includes a concentration device, and the concentration device is used for concentrating the liquid separated by the mud-water separation device to prepare a high-concentration protein solution.

In an optional mode of the present invention, the resource treatment equipment further includes a second blending tank, and the second blending tank is used for mixing the high-concentration protein solution with potassium fulvic acid and potassium humate. , at least one of phosphate rock powder is mixed to prepare liquid fertilizer.

In an optional mode of the present invention, the sludge resource treatment system further includes a waste gas treatment device, and at least one layer of biological adsorption layer is arranged in the waste gas treatment device; the waste gas treatment device and the low temperature The hydrolysis reactor is connected, and the biological adsorption layer is used for adsorbing the waste gas generated in the low temperature hydrolysis reactor.

In an optional mode of the present invention, the sludge resource treatment system further includes a steam return pipeline, and the steam return pipeline is used for connecting the flash tank and the conditioning preheating tank.

A sludge recycling treatment system provided by the utility model comprises a pretreatment device, a flash tank and a recycling device; wherein, the flash tank is located between the pretreatment device and the recycling device, and the flash tank is connected to the pretreatment device. The equipment and the recycling equipment are communicated through conveying equipment respectively; the flash tank includes a buffer zone and a flash zone located above the buffer zone, an adsorption device is arranged in the buffer zone, and the adsorption device is used to adsorb the sludge in the flash tank. heavy metal. In this way, by setting the adsorption device in the buffer zone of the flash tank, the liquid in the sludge will be rapidly vaporized due to the reduction of the pressure during the flash evaporation of the sludge in the flash tank, and the rapidly vaporized steam will agitate the sludge. , to ensure the full contact between the sludge and the adsorption device, the adsorption device can fully adsorb the heavy metals in the sludge, effectively remove the heavy metals in the sludge, and avoid the occurrence of secondary pollution caused by heavy metals to the environment; improve the sludge resource utilization.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

Fig. 1 is the structural representation of the sludge resource treatment system provided by the utility model;

Fig. 2 is the concrete application structure schematic diagram of the sludge resource treatment system provided by the utility model;

Fig. 3 is the structural representation in the flash tank in the sludge resource treatment system provided by the utility model;

FIG. 4 is a schematic three-dimensional structure diagram of the adsorption device in the flash tank in the sludge resource treatment system provided by the present invention;

Description of reference numbers:

10-Pretreatment equipment;

101- adjust the preheating box;

102-low temperature hydrolysis reactor;

20 - flash tank;

201-buffer;

202 - flash zone;

203 - adsorption device;

2031 - activated carbon sponge stick;

2302-fixed mounting plate;

2032a - the first sub-fixed mounting plate;

2032b-Second sub-fixed mounting plate;

30- Resource processing equipment;

301 - Slurry separation device;

302 - the first blending tank;

303 - concentration device;

304 - the second mixing tank;

40- Exhaust gas treatment device;

50 - Steam return line.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention. The embodiments described below and features in the embodiments may be combined with each other without conflict.

In the description of the embodiments of the present invention, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; may be directly connected, or indirectly connected through an intermediate medium, may be internal communication between two elements or an interaction relationship between two elements, unless otherwise expressly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of the present invention, it should be understood that the terms "inside", "outside", "upper", "bottom", "front", "rear" and the like indicate the orientation or positional relationship (if any) Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention.

Fig. 1 is a schematic diagram of the structure of a sludge recycling treatment system provided by the utility model; Fig. 2 is a schematic structural diagram of a specific application of the sludge recycling treatment system provided by the utility model; Fig. 3 is a schematic diagram of the sludge recycling provided by the utility model Schematic diagram of the structure in the flash tank in the treatment system; FIG. 4 is a schematic diagram of the three-dimensional structure of the adsorption device in the flash tank in the sludge resource treatment system provided by the present invention.

Referring to FIGS. 1 to 4 , a sludge recycling treatment system provided by an embodiment of the present invention includes a pretreatment device 10 , a flash tank 20 and a recycling device 30 ; wherein,

The flash tank 20 is located between the pretreatment equipment 10 and the recycling equipment 30, and the flash tank 20 is communicated with the preprocessing equipment 10 and the recycling equipment 30 through conveying equipment respectively;

The flash tank 20 includes a buffer zone 201 and a flash zone 202 located above the buffer zone 201 . An adsorption device 203 is arranged in the buffer zone 201 , and the adsorption device 203 is used for adsorbing heavy metals in the sludge in the flash tank 10 .

Specifically, in some embodiments, the pretreatment device 10 is mainly used for pretreatment of municipal sludge, that is, hydrolysis and wall breaking treatment of perishable organic matter and microorganisms in municipal sludge through dehydration treatment and hydrolysis treatment. This is not limited in this embodiment. It should be understood that the municipal sludge in this embodiment is only an example, and those skilled in the art can understand that the sludge resource treatment system provided by the present invention can also be used for industrial sludge, township sludge, etc. processing, which is not specifically limited in this embodiment.

In related technologies, municipal sludge that has not been stabilized is treated through sanitary landfill, aerobic composting, anaerobic consumption, sludge incineration and land use, etc., to reduce the amount of sludge while avoiding pollution. The perishable organic matter, odorous substances, pathogens, etc. contained in the mud cause secondary pollution to the environment. Although these treatment methods can avoid the secondary pollution of municipal sludge to the environment to a certain extent, they do not fully consider the impact of heavy metals contained in municipal sludge on the environment, and the heavy metals contained in municipal sludge will still cause environmental damage. Secondary pollution.

In the embodiment of the present invention, an adsorption device 203 is provided in the buffer zone 201 of the flash tank 20. When the municipal sludge is treated, the municipal sludge after high temperature hydrolysis enters the flash tank 20. The pressure in the tank 20 is reduced, and the moisture contained in the municipal sludge will be rapidly vaporized, and the rapidly vaporized steam will cause the municipal sludge to boil violently, thereby continuously stirring the municipal sludge in the flash tank 20 to ensure the municipal sludge. Adequate contact with adsorption device 203 within flash tank 20. Therefore, the adsorption device 203 can fully adsorb the heavy metals in the municipal sludge, thereby removing the heavy metals in the municipal sludge, avoiding secondary pollution to the environment caused by the heavy metals contained in the municipal sludge, and improving the utilization rate of the municipal sludge. .

3 and 4 , in some embodiments, the adsorption device 203 includes an activated carbon adsorption device, the activated carbon adsorption device and the flash tank 20 are arranged coaxially, and the side wall of the adsorption device 203 is connected to the inner side wall of the flash tank 20 Detachable connection;

The activated carbon adsorption device includes at least one activated carbon sponge rod 2031, and the activated carbon sponge rod 2031 is arranged along the axial direction of the flash tank.

Specifically, in this embodiment, the adsorption device 203 can be an activated carbon adsorption device, and the activated carbon can be modified activated carbon. The surface of the activated carbon has a large number of microporous honeycomb structures, which has good adsorption performance for heavy metals, and has been modified. The surface of the activated carbon has a large number of active functional groups, which can adsorb heavy metals in a targeted manner and improve the removal efficiency of heavy metals in municipal sludge. Specifically, in this embodiment, the modification of the activated carbon can be a modification method that has been disclosed in the related art such as amination modification, or other modification methods disclosed in the related art, as long as the modified activated carbon surface It only needs to have an active functional group capable of selectively adsorbing heavy metals, which is not specifically limited in this embodiment. In a specific implementation, the activated carbon may be activated carbon purchased from the market, or activated carbon purchased from the market as raw materials and fired by itself, which is not specifically limited in this embodiment. Of course, those skilled in the art can understand that the modification of activated carbon can be carried out differently for different heavy metals, so as to have different active functional groups.

In some embodiments, the inner side wall of the flash tank 20 may be provided with a mounting boss (not shown in the figure). Specifically, the mounting boss may be fixedly connected with the inner side wall of the flash tank 20; the adsorption device 203 may specifically be Installed on the mounting boss and connected by connecting parts such as bolts.

In this embodiment, the adsorption device 203 is detachably connected to the inner side wall of the flash tank 20. In this way, after the adsorption device 203 is saturated with adsorption, the adsorption device 203 can be easily disassembled, and the adsorption device 203 can be replaced and replaced. regeneration. Thus, the operation of the entire flash tank 20 and the regeneration of the adsorption device 203 are ensured, and the treatment efficiency of municipal sludge is improved.

In this embodiment, the activated carbon sponge sticks 2031 are arranged to extend along the axial direction of the flash tank 20. During the process of the municipal sludge moving downward in the flash tank 20, the municipal sludge can fully contact the activated carbon sponge sticks 2031. Therefore, the activated carbon sponge stick 2031 can fully adsorb the heavy metals in the municipal sludge, and the adsorption and removal efficiency of the heavy metals in the municipal sludge is improved.

3 and 4 , in some embodiments, the activated carbon adsorption device further includes a fixed installation plate 2032, the plate surface of the fixed installation plate 2032 has a plurality of fixed installation holes, and the activated carbon sponge rod 2031 is installed through the plurality of fixed installation holes On the fixed installation plate 2032 , the fixed installation plate 2032 is detachably connected to the inner side wall of the flash tank 20 .

In a specific implementation, the fixed mounting plate 2032 in this embodiment may be a porous mesh structure (not shown in the figure) to ensure that the municipal sludge can pass through smoothly. In some optional embodiments, the fixed mounting plate 2032 may be a mounting plate made of a hard stainless steel material, so as to support the mounting and fixing of the activated carbon sponge rod 2031 .

3 and 4, in some embodiments, the fixed mounting plate 2032 includes a first sub-fixed mounting plate 2032a and a second sub-fixed mounting plate 2032b, and the first sub-fixed mounting plate 2032a is located in the second sub-fixed mounting plate Above 2032b, the activated carbon sponge bar 2031 is located between the first sub-fixed mounting plate 2032a and the second sub-fixed mounting plate 2032b.

In this embodiment, by arranging the activated carbon sponge bar 2031 between the first sub-fixed mounting plate 2032a and the second sub-fixed mounting plate 2032b, when the adsorption device 203 is replaced, the entire adsorption device 203 can be easily replaced together Replacement improves the replacement efficiency of the adsorption device 203, thereby improving the treatment efficiency of municipal sludge.

In some embodiments, the diameter of the first sub-fixed mounting plate 2032a is larger than the diameter of the second sub-fixed mounting plate 2032b , and the diameter of the first sub-fixed mounting plate 2032a is smaller than or equal to the inner diameter of the flash tank 20 .

Further, in some embodiments, there are gaps between the plurality of activated carbon sponge bars 2031, and the gaps are used for the sludge in the flash tank 20 to pass through.

1 and 2, in some optional embodiments, the pretreatment equipment 10 includes a conditioning preheating box 101, the conditioning preheating box 101 is connected to the heating device, and the conditioning preheating box 101 is used for sludge treatment. The preheating box 101 is adjusted to have a double-layer structure, and a vacuum structure is formed between the inner wall and the outer wall of the preheating box 101, so that the preheating box 101 can be adjusted to keep the sludge warm.

Specifically, in this embodiment, the heating device may be a heating boiler; the water content of the municipal sludge is lower than 80% after pretreatment, and is transported to the conditioning preheating box through a conveying device (such as a screw pump or a screw stacker). In 101, a hydrolyzing agent is added in the regulating preheating box 101; in some optional embodiments, the hydrolyzing agent can be an acidic hydrolyzing agent, such as concentrated sulfuric acid; in other optional embodiments, the hydrolyzing agent can also be an alkali Hydrolyzing agents, such as one or more of calcium oxide, calcium hydroxide, and sodium hydroxide. It can be understood that the selection of the hydrolyzing agent can be selected according to the specific properties of the sludge, which is not specifically limited in this embodiment. The dosage of the hydrolyzing agent can be determined according to the organic matter content in the sludge. For example, when the hydrolyzing agent is an acidic agent, the dosage of the hydrolyzing agent can be 5%~20% (mass fraction) of the organic matter content; When it is an alkaline agent, the dosage of the hydrolyzing agent can be 10%~25% (mass fraction) of the organic matter content. The hydrolyzing agent and the sludge are fully mixed in the regulating preheating box 101 and the temperature is raised to 50-110° C., and the temperature is kept for 30-240 minutes.

1 and 2, in some optional embodiments, the pretreatment equipment 10 further includes a low-temperature water-connected reactor 102, the low-temperature hydrolysis reactor 102 communicates with the adjustment preheating box 101, and the low-temperature hydrolysis reactor 102 communicated with the heating device; the low-temperature hydrolysis reactor 102 is used for performing low-temperature hydrolysis on the sludge at a preset temperature.

Specifically, in this embodiment, the heating device supplies heat to the low-temperature hydrolysis reactor 102 through superheated steam, wherein the pressure of the superheated steam is 2-5 bar, and the sludge stays in the low-temperature hydrolysis reactor 102 for a reaction time of 30-240 min . In this way, the hydrolyzing agent can fully hydrolyze the sludge, the bacterial micelles in the sludge are broken up, and the cell walls of microorganisms such as bacteria and pathogens are ruptured, providing favorable conditions for subsequent working conditions. It should be noted that, in the low-temperature hydrolysis reactor 102, the superheated steam heats the sludge through a heat exchanger; in some embodiments, the heat exchanger may be a plate heat exchanger; in other optional embodiments , the heat exchanger may also be a tube-and-tube heat exchanger, which is not specifically limited in this embodiment. The sludge is indirectly heated by a heat exchanger, and the condensed water generated during the heating process is collected and returned to the heating device for recycling.

In a specific implementation, when the low-temperature reactor 102 performs the hydrolysis reaction, a small amount of waste gas such as hydrogen sulfide and ammonia gas will be generated according to the different properties of the sludge. Referring to FIG. 2, in an optional embodiment, the sludge resource treatment system further includes a waste gas treatment device 40, and at least one layer of biological adsorption layer is arranged in the waste gas treatment device 40; the waste gas treatment device 40 and the low-temperature hydrolysis The reaction kettle 102 is connected, and the biological adsorption layer is used for adsorbing the waste gas generated in the low temperature hydrolysis reaction kettle 102 . Specifically, in this embodiment, for the waste treatment device 40, reference may be made to the content disclosed in the applicant's previous patent application document with the application number CN201910095357.5, which will not be repeated in this embodiment.

Referring to FIGS. 1 and 2 , in some embodiments, the resource treatment equipment 30 includes a mud-water separation device 301 , and the mud-water separation device 301 is used to separate the mud and water from the flashed sludge in the flash tank 20 .

Specifically, in this embodiment, the mud-water separation device 301 may be a plate and frame filter press; in some optional embodiments, the mud-water separation device 301 may also be a centrifuge. In a specific implementation, the sludge after flash evaporation in the flash tank 20 is transported to the mud-water separation device 301 by a conveying device (eg screw pump, screw stacker), etc. The separation time is kept at 0.5~3h; after separation, dried sludge with a moisture content of 25%~40% and a protein solution containing organic nutrients such as broken cell walls are obtained.

Referring to FIGS. 1 and 2 , in some embodiments, the resource treatment equipment 30 further includes a first blending tank 302 , and the first blending tank 302 is used to separate the dried sludge and soil blends separated by the mud-water separation device 301 Mix to make soil conditioner.

Specifically, the dried sludge is transported to the first dispensing tank 302 through the conveying device, and the first blending tank 302 can be specifically modified according to the soil requirements (such as acid soil improvement, alkaline soil improvement or heavy metal soil improvement, etc.) Add the corresponding concoctions. For example: for acidic soil, one or more of plant ash, potassium carbonate and calcium magnesium phosphate fertilizer can be added. 30%~98%, it can be made into a soil conditioner for acidic soil; for alkaline soil, one or more of plant ash, potassium superphosphate, potassium dihydrogen phosphate and ammonium sulfate can be added to make a soil conditioner for alkaline soil. soil conditioner. In this way, the municipal sludge is made into a heavy metal-free soil conditioner, which realizes the resource utilization of the sludge, and at the same time, avoids secondary pollution caused by heavy metals to the environment, and improves the resource utilization rate of the sludge.

Referring to FIG. 1 and FIG. 2 , in some embodiments, the resource processing equipment 30 further includes a concentration device 303 for concentrating the liquid separated by the muddy water separation device 301 to prepare a high-concentration protein solution.

Specifically, the protein solution separated by the mud-water separation device 301 is pumped into the concentration device 303 through a high-pressure pump. In some optional implementations, the high-pressure pump may be one of a raw water pump, a plunger pump, and a canned pump; this embodiment does not specifically limit this. Specifically, in this embodiment, the concentration device 303 may be a SUPER NF/SUPER RO membrane concentration device.

In some optional embodiments, before entering the SUPER NF/SUPER RO membrane concentrating device, the protein solution can also be pretreated by a disc filter/sand filtration, and then transported into the SUPER NF/SUPER RO membrane by a high-pressure pump Concentration device; the working pressure in the SUPER NF/SUPER RO membrane concentration device is 50~160bar, and the concentration ratio of the protein liquid is 5~15 times.

Referring to FIGS. 1 and 2 , in some embodiments, the resource processing equipment 30 further includes a second blending tank 304 , which is used to combine the high-concentration protein solution with potassium fulvic acid and potassium humate , at least one of phosphate rock powder is mixed to prepare liquid fertilizer.

Among them, the mass fraction of potassium fulvic acid, potassium humate and phosphate rock powder in the high-concentration protein solution was added to ensure that the final obtained liquid fertilizer meets the national standard; the total nutrients (nitrogen + phosphorus pentoxide + potassium oxide) The mass fraction (calculated on a drying basis) ≥ 5.0.

Referring to FIGS. 1 and 2 , in some embodiments, the sludge recycling treatment system further includes a steam return pipe 50 , which is used for connecting the flash tank 20 and the conditioning preheating tank 101 .

The temperature of the material after flashing drops to 40~80℃, and the steam generated during the flashing process has a certain amount of waste heat, which is returned to the heating device through the reflux pipeline, which improves the energy utilization rate and ensures the working conditions of the subsequent equipment. Specifically, in this embodiment, the heating device may be a heating boiler, and the heating boiler uses superheated steam to heat the equipment that needs to be heated.

Based on the above specific embodiments, the beneficial effects of the sludge resource treatment system provided by the present utility model are fully explained below through two specific implementation cases and a comparison with related technologies.

Implementation case one

200TPD municipal sludge recycling

Through the control of the above operating conditions, 70T of soil conditioner and 13T of liquid fertilizer were obtained.

Implementation case two

200TPD municipal sludge recycling

Through the control of the above operating conditions, 65T of soil conditioner and 15T of liquid fertilizer were obtained.

The advantages of the sludge resource treatment system provided by the utility model are as follows:

1. Full resource utilization of sludge

The sludge is all produced into organic liquid fertilizer and soil conditioner at one time, without secondary treatment, which is used for agricultural production and soil improvement to realize full resource utilization.

2. To achieve harmless sludge

Effectively remove microorganisms and heavy metals in sludge, and the indicators of liquid fertilizer and soil conditioner produced meet the relevant standards of the Ministry of Agriculture on water-soluble fertilizers.

3. High cost performance and sustainable development

Its products have high nutrient content and high quality, and can be used for the supply of organic fertilizers in agriculture and forestry, as well as for soil improvement. The products have high added value and can be combined with modern ecological agriculture to achieve environmental benefits. At the same time, through product sales Income to achieve sustainable development.

From the above two tables, comparing and analyzing the sludge resource treatment system provided by the present utility model and related technologies, it can be clearly seen that the sludge resource treatment system provided by the present utility model and related technologies have obvious advantages, avoiding the need for At the same time, it effectively improves the resource utilization rate of sludge.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. A sludge recycling treatment system is characterized by comprising a pretreatment device, a flash tank and a recycling device; wherein,

the flash tank is positioned between the pretreatment equipment and the recycling equipment, and the flash tank is communicated with the pretreatment equipment and the recycling equipment through conveying equipment respectively;

the flash tank comprises a buffer area and a flash area located above the buffer area, wherein an adsorption device is arranged in the buffer area and used for adsorbing heavy metals in sludge in the flash tank.

2. The sludge resource treatment system according to claim 1, wherein the adsorption device comprises an activated carbon adsorption device, the activated carbon adsorption device and the flash tank are coaxially arranged, and the side wall of the adsorption device is detachably connected with the inner side wall of the flash tank;

the activated carbon adsorption device comprises at least one activated carbon sponge rod, and the activated carbon sponge rod is arranged along the axis direction of the flash tank.

3. The sludge recycling treatment system according to claim 1, wherein the pretreatment apparatus includes a conditioning preheating tank connected to a heating device, the conditioning preheating tank being configured to preheat the sludge; the adjusting preheating box is of a double-layer structure, and a vacuum structure is arranged between the inner wall and the outer wall of the adjusting preheating box, so that the adjusting preheating box can keep the temperature of the sludge.

4. The sludge recycling treatment system according to claim 3, wherein the pretreatment apparatus further comprises a low-temperature hydrolysis reaction kettle, the low-temperature hydrolysis reaction kettle is communicated with the adjusting preheating tank, and the low-temperature hydrolysis reaction kettle is communicated with the heat supply device; the low-temperature hydrolysis reaction kettle is used for carrying out low-temperature hydrolysis reaction on the sludge at a preset temperature.

5. The sludge recycling treatment system according to claim 1, wherein the recycling treatment apparatus includes a sludge-water separation device for separating sludge from water in the flash tank after the flash treatment.

6. The sludge recycling treatment system according to claim 5, wherein the recycling treatment apparatus further comprises a first blending tank for mixing the dried sludge separated by the sludge-water separation device with a soil conditioner to prepare a soil conditioner.

7. The sludge recycling treatment system according to claim 5, wherein the recycling treatment apparatus further comprises a concentration device for concentrating the liquid separated by the sludge-water separation device to prepare a high-concentration protein liquid.

8. The sludge recycling treatment system according to claim 7, wherein the recycling treatment apparatus further comprises a second blending tank for mixing the high concentration protein liquid with at least one of potassium fulvate, potassium humate, and ground phosphate rock to prepare a liquid fertilizer.

9. The sludge recycling treatment system according to claim 4, further comprising a waste gas treatment device, wherein at least one biological adsorption layer is arranged in the waste gas treatment device; the waste gas treatment device is communicated with the low-temperature hydrolysis reaction kettle, and the biological adsorption layer is used for adsorbing waste gas generated in the low-temperature hydrolysis reaction kettle.

10. The sludge recycling system as set forth in claim 3, further comprising a steam return line for communicating said flash tank with said conditioning pre-heat tank.

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