JPH09150030A - Deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a sufficient amount of cleaning water to be uniformly sprayed over a deodorizing carrier by arranging a dispersion plate with numerous water holes above the deodorizing carrier, and supplying the cleaning water from above the dispersion plate. SOLUTION: The interior of a box-type deodorizing tower 1 is divided into sections A-D, then each of partition walls 2 is installed at an appropriate interval from a top plate part to a bottom plate part, and a clearance for ventilation and water circulation is provided above and below each of the partition walls 2. Each section A-D is filled with a deodorizing carrier 3 bearing a microbe for decomposing a component intended for deodorizing. In addition, gas introducing piping 4 is connected to the lower part of a layer filled with the deodorizing carrier 3, while gas guide-out piping 5 is connected to the upper part of the layer. A water spray means consists of cleaning water supply piping 7 for supplying the cleaning water to a dispersion plate 6 and an area above the dispersion plate. Thus it is possible to clean the deodorizing carrier 3 with a sufficient amount of cleaning water in a short time.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a deodorizing device,
Specifically, it relates to a deodorizing device that performs a deodorizing operation by the biological deodorizing method.

[0002]

2. Description of the Related Art In recent years, as a deodorizing method in a sewerage facility, a biological deodorizing method using microorganisms has been attracting attention due to advantages such as low running cost and easy maintenance. This biological deodorizing method generally uses a deodorizing carrier in which a microorganism that decomposes components to be deodorized such as ammonia and hydrogen sulfide is supported on a carrier, and the deodorizing carrier is filled in a treatment cylinder (deodorizing tower) to remove the deodorant. It is carried out by passing a gas containing a component to be deodorized (a malodorous gas) through the packed bed of the carrier.

Further, in the biological deodorization method, when the biological deodorization operation is continued, the surface water and the deodorant which cover the surface of the carrier by the metabolites (oxidation products) produced by the oxidative decomposition action of the components to be deodorized by the microorganisms. P of water absorbed by the carrier
It was necessary to wash the carrier continuously or intermittently because H content gradually decreased and the deodorizing ability became weak.

Therefore, in a normal deodorizing apparatus for performing a deodorizing operation by the biological deodorizing method, a spray nozzle is provided above the deodorizing tower filled with the deodorizing carrier as a sprinkling means for spraying washing water on the deodorizing carrier.

[0005]

However, in sprinkling with a spray nozzle, in order to obtain an effective spray angle at the spray nozzle ejection end, at least 1.5 kg / cm.
A pressure of about ² was required, which required a pump with a high head. In addition, as the wash water, usually, water obtained by washing the deodorizing carrier and mixing make-up water such as sewage secondary treated water is used.Therefore, there are floating substances in the washing water, and this floating substance causes spray nozzles to spray nozzles. Occasionally, clogging occurred and sufficient and uniform watering could not be performed.

Furthermore, when water is sprinkled during the deodorizing operation,
The pressure loss of the malodorous gas increases with an increase in the amount of water sprayed, and when the amount of washing water is further increased, a loading phenomenon occurs in which the pressure loss sharply increases. For this reason, in the usual carrier washing operation, the operation is performed with a low amount of water so that the loading phenomenon does not occur.

However, when the amount of water is low, a phenomenon occurs in which the cleaning water flows unevenly in the deodorizing carrier, and there is a deodorizing carrier that is not sufficiently cleaned partially. The surface water of such a carrier has a low pH in a short time and is not in an environment suitable for the growth of microorganisms except for some sulfur-oxidizing bacteria, which causes a significant decrease in deodorizing performance.

[0008] Therefore, an object of the present invention is to provide a deodorizing device capable of evenly spraying a sufficient amount of cleaning water on a deodorizing carrier and simplifying the structure of the device.

[0009]

In order to achieve the above object, the deodorizing apparatus of the present invention is a deodorizing apparatus provided with a sprinkling means for sprinkling cleaning water on a deodorizing carrier filled in a deodorizing tower. It is characterized in that it is composed of a dispersion plate having a large number of water passage holes arranged above the deodorizing carrier and a cleaning water supply pipe for supplying cleaning water to the upper part of the dispersion plate.

Further, according to the present invention, in a deodorizing device provided with a sprinkling means for spraying washing water on a deodorizing carrier filled in the deodorizing tower, a vertical partition wall is provided in the deodorizing tower to provide a plurality of deodorizing towers. And a dispersion plate having a large number of water passage holes arranged above the deodorizing carrier in each compartment.
A sprinkling means composed of a washing water supply pipe for supplying washing water is provided on the upper part of the dispersion plate, and a washing water switch for sequentially supplying the washing water into each compartment is supplied to each washing water supply pipe. The feature is that each valve is provided.

Further, the present invention is based on the above both constitutions.
The deodorizing carrier is divided and filled into a plurality of upper and lower stages, and a dispersion plate having a large number of water passage holes is provided on the divided deodorizing carrier.
A sprinkling means constituted by a wash water supply pipe for supplying wash water was provided on the upper part of the dispersion plate, and a wash water switching valve for switching and supplying wash water was provided on each wash water supply pipe. Is characterized by.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. 1 to 3 show an example of a deodorizing apparatus to which the present invention is applied. FIG. 1 is a system diagram of the apparatus, FIG. 2 is a sectional plan view of a deodorizing tower portion, and FIG. 3 is a sectional side view. 4 to 6 show another embodiment of the deodorizing device to which the present invention is applied. FIG. 4 is a system diagram of the device, FIG. 5 is a sectional plan view, and FIG. 6 is a sectional side view. is there.

First, in the deodorizing apparatus shown in FIGS. 1 to 3, three partition walls 2 are provided in a vertical direction in a box-shaped deodorizing tower 1, and the deodorizing tower 1 is divided into four sections A and B. , C, D are formed separately. Each partition wall 2 is installed at an appropriate distance from the top plate and bottom plate of the deodorization tower 1,
Ventilation or water passage gaps are formed above and below each partition wall 2.

Each of the compartments is filled with a deodorizing carrier 3 having a carrier carrying microorganisms that decompose the deodorizing target component. A gas introduction pipe (duct) 4 for introducing a malodorous gas is provided below the packed bed of the deodorizing carrier 3 in each compartment.
Are connected to each other, and gas discharge pipes (ducts) 5 for discharging the deodorized gas are connected to the upper side, respectively, and a dispersion plate 6 and a cleaning water supply pipe for supplying cleaning water to the dispersion plate 6. 7 and 7, respectively, are provided.

The gas introduction pipe 4 is branched into four odorous gas introduction main pipes 8 connected to a odorous gas source (not shown), and the amount of inflow into each gas introduction pipe 4 is adjusted. A damper 9 for each is provided. Further, the four gas lead-out pipes 5 are combined into one gas lead-out main pipe 10 and connected to a suction fan or the like (not shown).

The dispersion plate 6 is provided above the packed layer of the deodorizing carrier 3 and below the upper end of the partition wall 2. The dispersing plate 6 is evenly washed on the lower deodorizing carrier 3. A large number of water passage holes 11 for spraying water are provided at appropriate intervals over the entire dispersion plate. This water hole 11
The size of can be appropriately set depending on the size of the apparatus, pressure loss, amount of gas, amount of washing water, and the like.

Further, the wash water supply pipe 7 is branched from the water supply main pipe 13 connected to the wash water tank 12 into four pipes,
Each wash water supply pipe 7 is provided with a wash water switching valve 14 for sequentially switching and supplying wash water into each compartment.

The washing water tank 12 is provided at a position sufficiently higher than that of the deodorization tower 1 so that a required amount of washing water can naturally flow down from the tank onto the dispersion plate 6. . In addition to the water supply main pipe 13, the cleaning water tank 12 has a pumping pipe 15 and an overflow pipe 16 for pumping cleaning water accumulated at the bottom of the deodorization tower 1 to the cleaning water tank 12 by a pump P.
The drain pipe 17 is connected. In addition, a supply pipe 18, an overflow pipe 19, and a drain pipe 20 are provided at the bottom of the deodorization tower 1.

In the deodorizing device having the above-described structure, the malodorous gas is introduced into each of the sections A, B, C and D in the deodorizing tower 1 from the gas introducing pipe 4 and brought into contact with the deodorizing carrier 3 to make it the same as the conventional one. A deodorizing process can be performed.

Then, sprinkling water for washing away the metabolites attached to the deodorizing carrier 3 and adjusting the pH of the surface water covering the carrier surface and the water absorbed by the deodorizing carrier 3 is performed.
This is performed by supplying cleaning water to the dispersion plate 6 of each section through the cleaning water supply pipe 7.

The deodorizing carrier 3 can be sprinkled with water only by supplying an appropriate amount of washing water onto the dispersion plate 6, and by appropriately setting the arrangement and size of the water passage holes 11,
Water can be evenly sprinkled on the deodorizing carrier 3, and the water passage holes 11 will not be clogged with suspended matter existing in the wash water. In order to surely prevent the water passage hole 11 from being clogged, a strainer may be provided in the pumping pipe 15, the washing water tank 12, or the water supply main pipe 13. This strainer is also used for spraying high-pressure water. It is possible to use a simpler one than the one corresponding to.

Further, since the washing water may be pumped from the bottom of the deodorization tower 1 to the washing water tank 12 or may be pumped directly onto the dispersion plate 6, a pump having a high head is not required and the washing water is also washed. When the water tank 12 is provided and the water is intermittently sprinkled, a required amount of washing water can be pumped to the washing water tank 12 by continuously operating the pump P even in a time period when the water is not sprinkled. A smaller capacity pump can be used as compared to. Moreover, the dispersion plate 6
Since it has a simple structure in which a large number of small holes are provided in a plate material such as a steel plate, the equipment cost and maintenance cost can be significantly reduced.

Further, since the inside of the deodorizing tower 1 is divided into a plurality of compartments, the deodorizing carrier can be sprayed to the deodorizing carrier 3 sequentially by switching each compartment to minimize pressure loss while minimizing the pressure loss. The washing of 3 can be performed sufficiently efficiently.

That is, when the deodorizing carrier 3 in the compartment A is washed, only the wash water switching valve 14 of the wash water supply pipe 7 connected to the compartment A is opened to wash the wash water in the wash water tank 12 into the dispersion plate of the section A. 6 is sprinkled with water on top to wash the deodorizing carrier 3 in the compartment A. At this time, the malodorous gas that should flow into the compartment A flows into the other compartments B, C, and D, but its flow rate increases only slightly, and a rapid increase in pressure loss hardly occurs, and stable operation is continued. be able to.

Therefore, since the loading phenomenon does not occur, it is possible to increase the amount of washing water supplied to the compartment A, and the sufficient amount of water for efficiently washing the deodorizing carrier 3 in the compartment A. Can be Section A
When the cleaning of the deodorizing carrier 3 in the interior is completed, similarly, the cleaning of the deodorizing carrier 3 in the other sections B, C and D may be performed in order.

As a result, the cleaning time of the deodorizing carrier 3 in each section can be shortened, and the efficiency of the deodorizing treatment can be greatly improved. The opening / closing of the wash water switching valve 14 can be easily automated by using a timer or the like. Also, the number of divisions in the deodorization tower 1 is arbitrary, but if the number of divisions is small, the change in pressure loss during cleaning will be large, and if the number of divisions is large, the piping etc. will become complicated. As shown, about 4 divisions are suitable.

Next, FIGS. 4 to 6 show the sections A, B,
The deodorizing carrier to be filled in C and D is divided into upper and lower two stages of the upper deodorizing carrier 3a and the lower deodorizing carrier 3b, and the same dispersion plate 21 is provided between the upper and lower deodorizing carriers 3a and 3b. It shows an example in which a sprinkling means including a wash water supply pipe 23 having a wash water switching valve 22 is provided. In addition,
Since other configurations can be configured the same as the examples shown in FIGS. 1 to 3, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

As described above, the deodorizing carrier is divided into the upper and lower two stages and the cleaning means for cleaning the lower deodorizing carrier 3b is provided, whereby more effective cleaning can be performed. In general, the lowering of the pH due to the biological deodorizing operation is larger in the lower part than in the upper part of the deodorizing carrier. this is,
This is because the malodorous component has a high concentration in the lower part where the malodorous gas flows in, so that the amount of oxidation products produced as a result of the oxidative decomposition action by the microorganisms also increases. Thus, it is extremely unreasonable to wash the entire deodorant carrier at a time even when the pH of the deodorant carrier is different, when the filling height of the deodorant carrier is high.

For example, it is necessary to frequently wash the lower part of the deodorizing carrier where the pH changes remarkably, but in reality, because the cleaning is not performed frequently because of the relationship with the upper part of the deodorizing carrier, a short time after cleaning. As a result, the pH is lowered and the deodorizing performance is impaired. On the other hand, the upper part of the deodorizing carrier is washed more than necessary, so the water film on the surface of the carrier becomes thick during and for a while after the cleaning, and the malodorous components dissolved in the surface water are taken up by the microorganisms. It becomes harder to be rare and deodorization efficiency decreases.

Therefore, the deodorizing carrier is divided into the upper deodorizing carrier 3a and the lower deodorizing carrier 3b in two steps, upper or lower, or divided into three or more steps, and sprinkling means is provided above each deodorizing carrier filling section. By providing, it is possible to perform effective sprinkling and washing according to the filling position of the deodorizing carrier. That is, the opening frequency of the washing water switching valve 14 of the upper sprinkling means and the opening frequency of the washing water switching valve 22 of the lower sprinkling means are appropriately set to set the number of times the lower deodorizing carrier 3b is washed to the upper deodorizing carrier 3a. More, or by making the lower cleaning water supply pipe 23 thicker than the upper cleaning water supply pipe 7 to increase the amount of cleaning water of the lower deodorizing carrier 3b, the lower deodorizing carrier 3b is sufficiently cleaned. It is possible to prevent the lowering of the pH of the lower deodorizing carrier 3b and to prevent the surface water of the upper deodorizing carrier 3a from becoming excessively thick, thereby improving the deodorizing efficiency of the entire deodorizing carrier. Can be improved.

In both of the above embodiments, the deodorizing device in which the inside of the deodorizing tower is divided into a plurality of compartments is illustrated. However, the sprinkling means consisting of the dispersion plate and the washing water supply pipe, and the upper and lower divided filling of the deodorizing carrier are internal. Even if it is applied to a general type deodorizing tower that does not divide into a plurality of compartments, the same effect as above can be obtained.

As in the conventional case, the secondary treatment water is used as the washing water, and it is replenished and drained according to the pH condition to adjust the pH to maintain a constant pH range, which is circulated and used.
It is also possible to drain the entire amount after washing without recycling. In this case, depending on the positional relationship with the source of the secondary treated water, the wash water can be allowed to flow down naturally onto the wash water tank or the dispersion plate, and the pump, which was indispensable in the conventional spray water spray, can be omitted.

[0033]

As described above, in the deodorizing apparatus of the present invention, the washing water for washing the deodorizing carrier is sprinkled from the dispersion plate having a large number of water passage holes, so that a pump with a high head is required. It is possible to perform necessary and sufficient water sprinkling. In addition, the deodorization tower is divided into a plurality of compartments, each of which is provided with a sprinkling means, so that the deodorizing carrier in each compartment can be washed in order, thereby suppressing a sharp increase in pressure loss. The deodorizing carrier can be washed in a short time with a sufficient amount of washing water. Furthermore, by dividing and filling the deodorizing carrier into a plurality of upper and lower stages and providing water sprinkling means for each of them, it is possible to carry out effective sprinkling cleaning according to the filling position of the deodorizing carrier.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an example of a deodorizing device to which the present invention is applied.

FIG. 2 is a cross-sectional plan view of a deodorizing tower portion in FIG.

FIG. 3 is a sectional side view of the same.

FIG. 4 is a system diagram showing another example of the deodorizing device to which the present invention is applied.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

6 is a cross-sectional side view of the deodorization tower portion of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deodorization tower, 2 ... Partition wall, 3, 3a, 3b ... Deodorization carrier, 4 ... Gas introduction piping, 5 ... Gas derivation piping, 6, 21 ...
Dispersion plate, 7, 23 ... Wash water supply pipe, 8 ... Odor gas introduction main pipe, 9 ... Damper, 10 ... Gas discharge main pipe, 11 ... Water passage hole, 12 ... Wash water tank, 13 ... Water supply main pipe, 14, 22 ... Wash water switching valve, 15 ... Pumping pipe, A, B, C, D ... Compartment, P
…pump

Claims (3)

[Claims] 1. A deodorizing device comprising a sprinkling means for spraying washing water on a deodorizing carrier filled in a deodorizing tower, wherein the sprinkling means is a dispersion plate having a plurality of water passage holes arranged above the deodorizing carrier. And a cleaning water supply pipe for supplying cleaning water to the upper part of the dispersion plate. 2. A deodorizing device equipped with a sprinkling means for spraying washing water onto a deodorizing carrier filled in the deodorizing tower, wherein a vertical partition wall is provided in the deodorizing tower to divide the deodorizing tower into a plurality of compartments. Each of the compartments has a sprinkling means including a dispersion plate having a plurality of water passage holes arranged above the deodorizing carrier in each compartment, and a cleaning water supply pipe for supplying cleaning water to the upper part of the dispersion plate. A deodorizing device characterized by being provided with a wash water switching valve for sequentially switching and supplying wash water into each compartment in each wash water supply pipe. 3. A deodorizing carrier is divided and filled into a plurality of upper and lower stages, and a dispersion plate having a large number of water passage holes on the upper part of the divided and filled deodorizing carrier, and washing water supplied to the upper part of the dispersing plate. 3. The deodorizing device according to claim 1, wherein each of the cleaning water supply pipes is provided with a water sprinkling means including a water supply pipe, and each of the cleaning water supply pipes is provided with a cleaning water switching valve. apparatus.