CN106925112B - Incinerator tail gas treatment system - Google Patents

Incinerator tail gas treatment system Download PDF

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Publication number
CN106925112B
CN106925112B CN201710280058.XA CN201710280058A CN106925112B CN 106925112 B CN106925112 B CN 106925112B CN 201710280058 A CN201710280058 A CN 201710280058A CN 106925112 B CN106925112 B CN 106925112B
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scr
tail gas
carrier
cavity
scr carrier
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CN106925112A (en
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刘善和
史玉龙
赵广福
黄成强
夏华跃
张伟
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Anhui Redpont Biotechnology Co ltd
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Anhui Redpont Biotechnology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/10—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The invention relates to the field of environmental protection and discloses an incinerator tail gas treatment system. Incinerator tail gas processing system includes: the system comprises a reaction tower, a VOC catalytic reaction cavity and an SCR denitration reaction cavity, wherein the VOC catalytic reaction cavity is used for catalyzing organic substances in tail gas into nitrogen oxides, and the SCR denitration reaction is used for catalyzing the nitrogen oxides after catalytic treatment into nitrogen; the SCR denitration reaction cavity is internally provided with an SCR carrier for carrying an SCR catalyst, and the incinerator tail gas treatment system also comprises a clamping device for mounting the SCR carrier; the clamping device can drive the SCR carrier to move along the height direction of the reaction tower and reach the VOC catalytic reaction cavity. The incinerator tail gas treatment system has the advantage of being easy to maintain.

Description

Incinerator tail gas treatment system
Technical Field
The invention relates to the field of environmental protection, in particular to an incinerator tail gas treatment system.
Background
The industry is dominant in national economy, with the development of industry, nitrogen oxide that industrial fuel discharges when burning is one of the causes of atmospheric pollution, and nitrogen oxide combines with the water in the air to be converted into nitric acid and is strong acid, strong corrosivity, falls to ground along with rainfall from the air, seriously destroys ecological environment, harms human health.
There are two main technical means for controlling the emission of nitrogen oxides, namely, by reducing the amount of nitrogen oxides generated in the combustion process, and by reducing the content of nitrogen oxides already generated in the exhaust, i.e., an exhaust denitration technique. The use of Selective Catalytic Reduction (SCR) has become widespread in the present sense.
SCR (Selective Catalytic Reduction) is a denitration reaction in which exhaust gas and a reducing agent, namely gas-phase ammonia, are catalytically reduced at an ambient temperature of 300 to 450 ℃, and is used to promote conversion of nitrogen oxides in the exhaust gas into nitrogen gas and water so as to achieve natural emission standard of nitrogen oxides. Denitration reaction goes on in the reaction tower, is provided with two-layer cavity in the reaction tower, and these two-layer cavity do respectively: the VOC catalytic reaction cavity is positioned on the lower layer and connected with the tail gas outlet of the incinerator and is used for catalyzing organic substances in the tail gas into nitric oxides; and the SCR denitration reaction cavity is positioned on the upper layer and connected with the VOC catalytic reaction cavity and is used for catalyzing the nitrogen oxides treated by the VOC catalytic reaction furnace into nitrogen.
In the prior art, an SCR supporting body is usually provided to support a catalyst for denitration reaction. When the SCR catalyst is aged to reach the service life, the catalyst needs to be sprayed again or the SCR carrier needs to be replaced. When tail gas flows in the cavity, because the impurity content of tail gas is higher, the dust is piled up after long-term use, and the mesh arranged on the SCR carrier is easy to block, so that the SCR carrier needs to be maintained regularly. Usually, in order to make reasonable use of space, the reaction tower is tall and the SCR supporting body is distributed inside the reaction tower.
It is worth mentioning that when a plurality of SCR supporting bodies are arranged in the reaction tower in a staggered manner, part of the SCR supporting bodies are often arranged at the high position inside the reaction tower, the SCR supporting bodies at the high position are difficult to touch during replacement, and mechanical equipment outside the tower is difficult to enter, so that the replacement and maintenance are difficult.
Disclosure of Invention
The invention aims to provide an incinerator tail gas treatment system which has the advantage of easiness in maintenance.
In order to solve the above technical problems, the present invention provides an incinerator tail gas treatment system, comprising:
the reaction tower is provided with two layers of cavities, and the two layers of cavities are respectively:
the VOC catalytic reaction cavity is positioned on the lower layer and connected with the tail gas outlet of the incinerator and is used for catalyzing organic substances in the tail gas into nitrogen oxides;
the SCR denitration reaction cavity is positioned on the upper layer and connected with the VOC catalytic reaction cavity and is used for catalyzing the nitrogen oxides treated by the VOC catalytic reaction furnace into nitrogen;
the SCR denitration reaction cavity is internally provided with an SCR carrier for carrying an SCR catalyst, and the incinerator tail gas treatment system also comprises a clamping device for mounting the SCR carrier;
the clamping device can drive the SCR carrier to move along the height direction of the reaction tower and reach the VOC catalytic reaction cavity.
Compared with the prior art, the two-layer cavity is arranged in the reaction tower, so that nitrogen oxides generated by the tail gas through VOC catalytic reaction can smoothly enter the SCR denitration reaction cavity, the SCR bearing body can move along the height direction of the reaction tower under the driving of the clamping device, the SCR bearing body arranged at a high position can be lowered, the high-position operation of replacing the SCR bearing body is converted into the low-position operation, and the disassembly, the assembly and the maintenance are convenient.
Preferably, the clamping device comprises a lifting motor, a lifting transmission assembly in transmission connection with the lifting motor and a clamp in connection with the lifting transmission assembly, and the SCR carrier is detachably mounted on the clamp;
the lifting motor drives the clamp to move along the height direction of the reaction tower through the lifting transmission assembly. The clamping device is provided with the lifting motor, so that the SCR carrier moves along the height direction under the control of the lifting motor, and the SCR carrier is labor-saving and convenient to use.
Further, preferably, the clamp includes a head portion for mounting the SCR carrier, a neck portion connected to the head portion, and a link portion connected to the neck portion perpendicularly to each other.
The connecting rod part is arranged along the height direction of the reaction tower, and the tail end of the connecting rod part is provided with teeth;
the lifting transmission assembly comprises a gear connected with the connecting rod part and a transmission shaft connected with the gear, and the transmission shaft is in transmission connection with the lifting motor.
Wherein, the transmission shaft at least partially passes through the lateral wall of the reaction tower, is positioned outside the reaction tower and is in transmission connection with a lifting motor which is also positioned outside the reaction tower.
The ambient temperature in the reaction tower is higher, sets up elevator motor in the outside of reaction tower, can effectively protect elevator motor, extension elevator motor's life, and the during operation has higher reliability. The lifting motor drives the gear to rotate through the transmission shaft, the gear and the teeth on the connecting rod part drive the SCR carrier to move in the height direction, the service life of the gear transmission is long, and the reliability of the transmission work is high. The connecting rod portion is arranged in the SCR denitration reaction cavity and outside the SCR carrier, and the SCR carrier can be effectively controlled to move in the height direction by utilizing the excellent transmission performance of the optional angle staggered shaft of the gear.
Further, preferably, the waist cross section of the SCR carrier body is circular;
the head is annular and is connected with the waist of the SCR carrier.
The waist cross section of the SCR carrier is circular, and the circular section is stressed in a balanced manner, so that the SCR carrier is fixed by a clamp.
Preferably, the SCR supporting body is a cylinder, honeycomb-shaped pores are formed inside the SCR supporting body, and a catalyst for the SCR denitration reaction is distributed in the pores.
The SCR supporting body is the cylinder, and for the cube, the volume of the material cylinder of the same quantity is bigger, can make tail gas react fully when the SCR denitration reaction, and simultaneously, the inside hole that is provided with of SCR supporting body makes the area of contact increase of catalyst and tail gas, can accelerate nitrogen oxide to change into nitrogen gas and water, realizes the natural emission. The catalyst in the SCR carrier is generally homogeneous catalyst, and the catalyst is uniformly coated in the pores, so that the mixing uniformity of the tail gas and the catalyst can be effectively ensured, and the reaction can achieve an ideal effect.
In addition, as preferred, be formed with the motor cavity in the neck, be provided with the rotating electrical machines in the motor cavity, the rotating electrical machines is connected with SCR supporting body transmission to it uses self axis to rotate as the rotation axis to drive the SCR supporting body. The rotating motor drives the SCR carrier to rotate, so that the tail gas and the catalyst are mixed more uniformly, the rotation of the SCR carrier causes gas disturbance, the loss of the catalyst in the SCR carrier can be homogenized, the utilization rate of the catalyst is improved, and the service life of the SCR carrier is prolonged.
Further, as a preferred option, an annular track is formed in the head portion, an annular ring is arranged in the annular track, the SCR carrier is detachably mounted on the annular ring, and the rotating motor is used for driving the rack or the chain to rotate along the annular track. SCR supporting body detachably installs on the ring, convenient operation when maintaining and repairing. The SCR supporting body rotates under the action of the rotating motor, so that the mixing uniformity of tail gas and a catalyst is improved, and the SCR denitration reaction is fully performed.
Further, as the preferred, the outer layer of annular ring is provided with the tooth, is provided with the lantern ring on the waist of SCR supporting body, and the lantern ring passes through the bolt reciprocal anchorage with the lateral wall of annular ring. The lantern ring has strengthened the reliability that the SCR supporting body is connected through easy dismounting's bolt fastening with the lateral wall of ringlike circle, and the ringlike circle is provided with the tooth, can effectively drive the SCR supporting body rotatory, makes tail gas and catalyst intensive mixing.
Preferably, the shell of the reaction tower is provided with a tower door at the position of the VOC catalytic reaction chamber. Can the rapid transportation problem SCR supporting body when the tower door is opened, and set up the tower door at SCR reaction chamber relatively, the tower door of seting up in the position in VOC catalytic reaction chamber is favorable to the transport of SCR supporting body, and it is convenient to maintain.
Further, as a preferred option, the incinerator tail gas treatment system further comprises a conveyor belt, and the conveyor belt is used for conveying the SCR carrier out of the reaction tower. The conveyer belt operation is reliable laborsaving, and is less to the wearing and tearing of goods year, is convenient for carry the maintenance.
Drawings
FIG. 1 is a schematic sectional view in elevation of a reaction column according to a first embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a clamping device according to a second embodiment of the present invention;
FIG. 3 is a schematic sectional top view of an SCR denitration reaction chamber according to a third embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a clamp according to a fourth embodiment of the present invention;
FIG. 5 is a schematic top cross-sectional view of an SCR carrier according to a fourth embodiment of the present invention;
FIG. 6 is a schematic sectional view in front view of a reaction column in a fifth embodiment of the present invention.
Description of the reference numerals:
1-a reaction tower; 2-a tail gas outlet; 3-a VOC catalytic reaction chamber; 4-SCR denitration reaction cavity; 5-SCR carrier; 51-pores; 52-a collar; 521-bolt; 6-a clamping device; 61-a lifting motor; 62-a lifting transmission assembly; 621-gear; 622-a drive shaft; 63-a clamp; 631-a head; 6311-annular ring; 632-neck portion; 6321 — rotating electrical machine; 633-link portion; 7-a tower door; 8-a conveyor belt.
Detailed Description
Implementation mode one
A first embodiment of the present invention provides an incinerator tail gas treatment system, see fig. 1, comprising:
reaction tower 1 is provided with two-layer cavity in the reaction tower 1, and these two-layer cavity do respectively:
the VOC catalytic reaction cavity 3 is positioned at the lower layer and is connected with the tail gas outlet 2 of the incinerator and is used for catalyzing organic substances in the tail gas into nitrogen oxides;
the SCR denitration reaction cavity 4 is positioned on the upper layer and connected with the VOC catalytic reaction cavity 3 and is used for catalyzing the nitrogen oxides treated by the VOC catalytic reaction furnace into nitrogen;
an SCR supporting body 5 for supporting an SCR catalyst is arranged in the SCR denitration reaction cavity 4, and the incinerator tail gas treatment system further comprises a clamping device 6 for mounting the SCR supporting body 5;
the clamping device 6 can drive the SCR carrier 5 to move along the height direction of the reaction tower 1 and reach the VOC catalytic reaction chamber 3.
Particularly, two-layer cavity is cut apart into by the baffle to reaction tower 1, is provided with the VOC supporting body that corresponds in the VOC catalytic reaction chamber 3, passes through the pipe connection between VOC catalytic reaction chamber 3 and the SCR denitration reaction chamber 4. When the SCR carrier needs to be maintained, the VOC carrier is firstly taken out, then the partition plate is taken down, the SCR carrier 5 moves downwards along the height direction of the reaction tower 1 through the clamping device 6, and then the SCR carrier 5 is taken out, so that the maintenance can be carried out.
Compared with the prior art, the two-layer cavity is arranged in the reaction tower 1, so that nitrogen oxides generated by the tail gas through VOC catalytic reaction can smoothly enter the SCR denitration reaction cavity 4, and the SCR carrier 5 can move along the height direction of the reaction tower 1 under the driving of the clamping device 6. When the SCR catalyst is aged and the SCR carrier 5 needs to be maintained, the VOC carrier is preferentially moved out of the reaction tower 1, and the SCR carrier 5 can be directly moved to the height of the VOC carrier and out of the reaction tower 1 through the clamping device 6, so that the SCR carrier 5 arranged at the high position can be lowered, the high-position operation of replacing the SCR carrier 5 is converted into the low-position operation, and the disassembly, the assembly and the maintenance are convenient.
Second embodiment
A second embodiment of the present invention provides an incinerator tail gas treatment system. The second embodiment is a further improvement of the first embodiment, and is mainly improved in that in the second embodiment of the invention, a clamping device 6 is provided, as shown in fig. 2, the clamping device 6 comprises a lifting motor 61, a lifting transmission assembly 62 in transmission connection with the lifting motor 61, and a clamp 63 in transmission connection with the lifting transmission assembly 62, and the scr carrier 5 is detachably mounted on the clamp 63.
The clamp 63 includes a head 631 for mounting the SCR carrier 5, a neck 632 connected to the head 631, and a link 633 perpendicularly connected to the neck 632. The link section 633 is provided along the height direction of the reaction tower 1, and teeth are provided at the tail end of the link section 633.
The lifting transmission assembly 62 includes a gear 621 connected to the connecting rod 633 and a transmission shaft 622 connected to the gear 621, and the transmission shaft 622 is in transmission connection with the lifting motor 61.
Wherein, the transmission shaft 622 at least partially penetrates through the side wall of the reaction tower 1 and is positioned outside the reaction tower 1, and is in transmission connection with the lifting motor 61 which is also positioned outside the reaction tower 1. Preferably, the lifting transmission assembly 62 comprises a pulley block connected to said lifting motor 61, the pulley block being arranged outside the reaction tower 1. The arrangement of the pulley block can improve the torque output of the lifting motor 61 and reduce the requirement on the lifting motor 61.
The lifting motor 61 drives the clamp 63 to move along the height direction of the reaction tower 1 through the lifting transmission assembly 62. The clamping device 6 is provided with the lifting motor 61, so that the SCR carrier 5 moves along the height direction under the control of the lifting motor 61, and the pulley block arranged outside the reaction tower 1 is matched for use, thereby being more labor-saving and convenient. Preferably, in the present embodiment, the lifting of the supporting body can be realized by a screw structure.
The ambient temperature in the reaction tower 1 is higher, and the lifting motor 61 is arranged outside the reaction tower 1, so that the lifting motor 61 can be effectively protected, the service life of the lifting motor 61 is prolonged, and the working reliability is higher. The lifting motor 61 drives the gear 621 to rotate through the transmission shaft 622, the gear 621 and the teeth on the connecting rod 633 drive the SCR supporting body 5 to move in the height direction, the transmission life of the gear 621 is long, and the reliability of transmission work is high. The connecting rod 633 is disposed inside the SCR denitration reaction chamber 4 and outside the SCR carrier 5, and can effectively control the movement of the SCR carrier 5 in the height direction by using the excellent transmission performance of the arbitrary angle staggered shaft of the gear 621.
Third embodiment
A third embodiment of the present invention provides an incinerator tail gas treatment system. The third embodiment is a further improvement of the second embodiment, and the main improvement is that in the third embodiment of the invention, as shown in fig. 3, the waist cross section of the SCR supporting body 5 is circular;
the head 631 is annular and is connected to the waist of the SCR carrier 5.
The waist cross section of the SCR carrier 5 is circular, and the stress of the circular cross section is balanced, so that the clamp 63 is favorable for fixing the SCR carrier 5.
In the present embodiment, the SCR supporting body 5 is a cylindrical body, honeycomb-shaped pores 51 are formed inside the SCR supporting body 5, and the catalyst for the SCR denitration reaction is distributed in these pores 51.
SCR supporting body 5 is the cylinder, and for the cube, the volume of the material cylinder of the same quantity is bigger, can make tail gas react fully at the SCR denitration reaction, and simultaneously, SCR supporting body 5 is inside to be provided with hole 51, makes the area of contact increase of catalyst and tail gas, can accelerate nitrogen oxide to convert into nitrogen and water, realizes the natural emission.
The SCR carrier 5 can be prepared in various ways. For example, it may be in TiO form 2 As a base material, with V 2 O 5 As the main active ingredient, use WO 3 、MoO 3 TiO is used as an auxiliary component for resisting oxidation and toxicity 2 、V 2 O 5 、WO 3 The mixture is passed through a ceramic extrusion apparatus to form catalyst elements of 150mm x 150mm cross-section and varying lengths, and then assembled into a standard cylindrical SCR support 5. Of course, the actual use may not be limited to this scheme. The catalyst in the SCR carrier 5 is generally a homogeneous catalyst, and the catalyst is uniformly coated in the pores 51, so that the uniformity of mixing the tail gas and the catalyst can be effectively ensured, and an ideal reaction effect can be achieved.
Example IV
A fourth embodiment of the present invention provides an incinerator tail gas treatment system. The fourth embodiment is a further improvement of the third embodiment, and is mainly improved in that, in the fourth embodiment of the present invention, as shown in fig. 4 and 5, a motor cavity is formed in the neck portion 632, a rotating motor 6321 is disposed in the motor cavity, and the rotating motor 6321 is in transmission connection with the SCR carrier 5 and is used for driving the SCR carrier 5 to rotate with its own axis as a rotation axis. Rotating electrical machines 6321 drives SCR supporting body 5 rotatory, makes the mixture of tail gas and catalyst more even, and the rotation of SCR supporting body 5 causes gaseous disturbance, can be so that the loss homogenization of catalyst in SCR supporting body 5, improves the utilization ratio of catalyst, prolongs the life of SCR supporting body 5.
Further, it is preferable that an annular track is formed in the head 631, and an annular ring 6311 is provided in the annular track, and the annular ring 6311 may have a tooth-like structure or may have a groove formed in an inner wall thereof.
The SCR carrier 5 is detachably mounted on the annular ring 6311, and the rotating motor 6321 is used to drive the rack or chain to rotate along the annular track. The SCR carrier 5 is detachably mounted on the annular ring 6311, and is convenient to operate during maintenance and overhaul. SCR supporting body 5 rotates under the effect of rotating electrical machines 6321, has improved the homogeneity that tail gas and catalyst mix, is favorable to fully going on of SCR denitration reaction.
The outer layer of the annular ring 6311 is provided with teeth, the waist of the SCR carrier 5 is provided with a collar 52, and the collar 52 and the side wall of the annular ring 6311 are fixed to each other by bolts 521. The lantern ring 52 is fixed with the lateral wall of the annular ring 6311 through the bolt 521 convenient to disassemble and assemble, the reliability of connection of the SCR carrier 5 is enhanced, the annular ring 6311 is provided with teeth, the SCR carrier 5 can be effectively driven to rotate, and the tail gas and the catalyst are fully mixed.
In the present embodiment, as shown in fig. 5, the SCR carrier 5 and the collar 52 are fixed by 16 symmetrically distributed bolts 521, the collar 52 and the annular ring 6311 are also connected by 16 symmetrically distributed bolts 521, and the two bolts 521 are disposed at an interval, thereby avoiding stress concentration in the collar 52 and improving reliability. Of course, in actual use, the number of bolts is not limited to the present embodiment, and it is not necessary to use bolts, and other connection methods such as snap and rivet may be used.
Fifth embodiment
A fifth embodiment of the present invention provides an incinerator tail gas treatment system. The fifth embodiment is a further modification of the first embodiment, and is mainly modified in that, in the fifth embodiment of the present invention, as shown in fig. 6, a tower door 7 is opened in the outer shell of the reaction tower 1 at the position of the VOC catalytic reaction chamber 3. Can the rapid transportation problem SCR supporting body 5 when tower door 7 is opened, and set up tower door 7 at SCR reaction chamber relatively, the tower door 7 of setting up in the position of VOC catalytic reaction chamber 3 is favorable to the transport of SCR supporting body 5, and it is convenient to maintain.
In this embodiment, the incinerator tail gas treatment system further comprises a conveyor belt 8, and the conveyor belt 8 is used for conveying the SCR carrier 5 out of the reaction tower 1. The conveyor belt 8 is reliable and labor-saving in operation, has small abrasion to the goods load and is convenient to convey and maintain.
It will be appreciated by those of ordinary skill in the art that in the embodiments described above, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the invention.

Claims (3)

1. An incinerator tail gas treatment system comprising:
the reaction tower (1), be provided with two-layer cavity in the reaction tower (1), these two-layer cavity are respectively:
the VOC catalytic reaction cavity (3) is positioned at the lower layer and is connected with the tail gas outlet (2) of the incinerator and is used for catalyzing organic substances in the tail gas into nitric oxides;
the SCR denitration reaction cavity (4) is positioned on the upper layer and connected with the VOC catalytic reaction cavity (3) and is used for catalyzing the nitrogen oxides treated by the VOC catalytic reaction cavity into nitrogen;
the method is characterized in that:
an SCR carrier (5) for carrying an SCR catalyst is arranged in the SCR denitration reaction cavity (4), and the incinerator tail gas treatment system further comprises a clamping device (6) for mounting the SCR carrier (5); the clamping device (6) can drive the SCR carrier (5) to move along the height direction of the reaction tower (1) and reach the VOC catalytic reaction chamber (3);
the clamping device (6) comprises a lifting motor (61), a lifting transmission component (62) in transmission connection with the lifting motor (61) and a clamp (63) connected with the lifting transmission component (62), and the SCR carrier (5) is detachably mounted on the clamp (63);
the lifting motor (61) drives the clamp (63) to move along the height direction of the reaction tower (1) through the lifting transmission assembly (62);
the clamp (63) comprises a head part (631) used for mounting the SCR carrier (5), a neck part (632) connected with the head part (631), and a connecting rod part (633) vertically connected with the neck part (632);
the connecting rod part (633) is arranged along the height direction of the reaction tower (1), and the tail end of the connecting rod part (633) is provided with teeth;
the lifting transmission assembly (62) comprises a gear (621) connected with the connecting rod part (633) and a transmission shaft (622) connected with the gear (621), and the transmission shaft (622) is in transmission connection with the lifting motor (61);
wherein, the transmission shaft (622) at least partially penetrates through the side wall of the reaction tower (1), is positioned outside the reaction tower (1), and is in transmission connection with a lifting motor (61) which is also positioned outside the reaction tower (1);
the waist cross section of the SCR carrier (5) is circular;
the head part (631) is annular and is connected with the waist part of the SCR carrier body (5);
the SCR carrier (5) is a cylinder, honeycomb-shaped pores (51) are formed inside the SCR carrier (5), and a catalyst for SCR denitration reaction is distributed in the pores (51);
a motor cavity is formed in the neck (632), a rotating motor (6321) is arranged in the motor cavity, and the rotating motor (6321) is in transmission connection with the SCR carrier (5) and is used for driving the SCR carrier (5) to rotate by taking the axis of the SCR carrier as a rotating axis;
an annular track is formed in the head (631), an annular ring (6311) is arranged in the annular track, the SCR carrier (5) is detachably mounted on the annular ring (6311), teeth are arranged on the outer layer of the annular ring (6311), and the rotary motor (6321) is used for driving the annular ring (6311) to rotate in the annular track; the waist of the SCR carrier (5) is provided with a lantern ring (52), and the lantern ring (52) and the side wall of the annular ring (6311) are fixed to each other through a bolt (521).
2. The incinerator tail gas treatment system according to claim 1, characterized by: and a tower door (7) is arranged on the shell of the reaction tower (1) at the position of the VOC catalytic reaction cavity (3).
3. The incinerator tail gas treatment system of claim 2, characterized by: the incinerator tail gas treatment system further comprises a conveyor belt (8), and the conveyor belt (8) is used for conveying the SCR carrier (5) out of the tower door (7).
CN201710280058.XA 2017-04-26 2017-04-26 Incinerator tail gas treatment system Active CN106925112B (en)

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CN110898666A (en) * 2019-12-12 2020-03-24 福建艾尔普环保股份有限公司 High-concentration nitrogen-containing organic waste gas catalytic purification device

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CN204973599U (en) * 2015-09-09 2016-01-20 北京方信立华科技有限公司 Online recycle and regeneration device of SCR reactor
CN105712551A (en) * 2016-03-23 2016-06-29 徐州立方机电设备制造有限公司 Photocatalysis sewage treatment device
CN205655464U (en) * 2016-05-07 2016-10-19 森斯诺（北京）空气净化技术开发有限公司 Conveniently change filter equipment's air purifier
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CN201684582U (en) * 2010-05-14 2010-12-29 中国石化集团四川维尼纶厂 Grid structure of a vinyl acetate reactor
CN102233231A (en) * 2011-07-21 2011-11-09 上海师范大学 Purification equipment and treatment process for tail gas from acrylonitrile absorption tower
JP2012206122A (en) * 2012-07-17 2012-10-25 Nippon Shokubai Co Ltd Method for treating waste water
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CN204973599U (en) * 2015-09-09 2016-01-20 北京方信立华科技有限公司 Online recycle and regeneration device of SCR reactor
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