CN211302394U

CN211302394U - Kitchen garbage foul gas processing system

Info

Publication number: CN211302394U
Application number: CN201921804672.2U
Authority: CN
Inventors: 易志刚; 祖柱
Original assignee: Hunan Lianhe Kitchen Waste Disposal Co ltd
Current assignee: Hunan Renhe Environment Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-08-21
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a kitchen waste malodorous gas treatment system, which comprises a cooling tower, an alkaline washing tower, a filter chamber, an ozone water washing chamber, a photo-oxidation catalytic oxidation chamber and a fan; the cooling tower, the alkaline washing tower, the filtering chamber and the fan are sequentially communicated through a pipeline, the ozone water washing chamber, the photo-oxidation catalytic oxidation chamber and the fan are sequentially communicated through a pipeline, and the filtering chamber is communicated with the ozone water washing chamber. The adoption of the cooling tower to reduce the temperature and the humidity of the odor is beneficial to reducing the processing load of the deodorization system. In order to remove acid and odor substances in the gas, an alkaline washing spray tower is adopted for washing. After washing, further treatment is carried out through a biological filter bed. The deodorization system adopts ultraviolet light catalysis and ozone oxidation, and also adopts an ozone water spraying process to dissolve ozone in water to prepare high-concentration ozone water, and the ozone water is sprayed into water mist to be fully contacted and oxidized with waste gas through a spraying device to remove malodorous substances. The odor removal effect is good and the efficiency is high.

Description

Kitchen garbage foul gas processing system

Technical Field

The utility model relates to a refuse treatment equipment technical field especially relates to a kitchen garbage foul gas processing system.

Background

With the increasing of the strength of strengthening the unified recovery treatment of the kitchen waste in various places, kitchen waste treatment plants in various places emerge. However, since the kitchen waste has the characteristics of high organic matter content, high water content, easy putrefaction and the like, a large amount of malodorous gas is inevitably generated in the treatment process of the kitchen waste, so that the generated odor needs to be collected and treated, and the overflow is avoided. At present, the treatment method for the kitchen waste malodorous gas mainly comprises a combustion method, a chemical method, a biological method, a plasma oxidation method and the like, a plurality of treatment plants only adopt a single process or simply combine a plurality of processes, and do not carry out targeted treatment according to the characteristics of the kitchen waste malodorous gas, so that the problems that the treatment is difficult to reach the standard or the treatment process is too complex, the treatment cost is too high and the like occur, meanwhile, the odor treatment system is operated manually and many people are mainly patrolled on time, and the industrial automation has defects.

In addition, the prior kitchen waste treatment system has the following technical problems:

1. at present, odor collecting pipelines of kitchen waste treatment plants are mainly distributed in specific equipment and a pool body where odor sources are located, and the odor collecting amount of the whole workshop large environment is reduced. Therefore, the currently collected odor has the characteristics of high temperature, high humidity, more volatile organic compounds and the like, and the system treatment load is large.

2. According to the running experience, the odor has higher acidity, and the odor is mainly acidic odor. Therefore, when acid gas in odor is removed by adopting alkaline washing spray, the problem that workers frequently add alkali to keep the pH value of the spray liquid needs to be solved.

3. After biological deodorization, a part of malodorous substances in the waste gas can not be completely removed, and the waste gas is generally treated by photo-oxidation catalysis at present. But the photo-oxidation catalysis effect is general, and the removal rate is not thorough.

4. When the waste gas treatment system runs, if the system runs badly, the waste gas treatment is not up to the standard and is directly discharged. If the information cannot be found and processed in time, the surrounding environment is seriously affected.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide an odor removal effect is good, efficient, and moves safe environmental protection, kitchen garbage foul gas processing system that degree of automation is high.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a kitchen waste malodorous gas treatment system comprises a cooling tower, an alkaline washing tower, a filtering chamber, an ozone water washing chamber, a photo-oxidation catalytic oxidation chamber and a fan; the cooling tower, the alkaline washing tower, the filtering chamber and the fan are sequentially communicated through a pipeline, the fan, the ozone water washing chamber and the photo-oxidation catalytic oxidation chamber are sequentially communicated through a pipeline, and the filtering chamber is communicated with the ozone water washing chamber.

The odor collected at present has the characteristics of high temperature, high humidity, more volatile organic compounds and the like, and the adoption of cooling to reduce the temperature and the humidity of the odor is favorable for reducing the processing load of a deodorization system. In order to remove acid and odor substances in the gas, an alkaline washing spray tower is adopted for washing. After washing, further treatment is carried out through a biological filter bed. The deodorization system adopts ultraviolet light catalysis and ozone oxidation, and also adopts an ozone water spraying process to dissolve ozone in water to prepare high-concentration ozone water, and the ozone water is sprayed into water mist to be fully contacted and oxidized with waste gas through a spraying device to remove malodorous substances. The odor removal effect is good and the efficiency is high.

As a further improvement of the above technical solution:

the ozone water washing chamber and the photo-oxidation catalytic oxidation chamber are communicated with the ozone generation system.

The ozone generating system comprises an air compressor, an air storage tank and a cold dryer which are sequentially communicated, a first ozone generator and a steam-water mixer are sequentially communicated between the cold dryer and the ozone water washing chamber, the steam-water mixer is communicated with the ozone water washing chamber through a circulating water pump, and a second ozone generator is communicated between the cold dryer and the photo-oxidation catalytic oxidation chamber.

And a spray pipe is arranged on the top wall of the inner cavity of the ozone water washing chamber and is communicated with the steam-water mixer.

The photo-oxidation and catalytic oxidation chamber is connected with an exhaust pipe, and a gas monitor is arranged on the exhaust pipe. The system is convenient to supervise, and when detecting that the related indexes are higher, the system automatically controls the running frequency of the fan, reduces the treatment capacity of waste gas, reduces the treatment load, avoids the excessive emission of the waste gas and sends out alarm information. When the relevant indexes are restored to a lower level, the system automatically controls the running frequency of the fan to be restored and relieves the alarm.

The lower part of the inner cavity of the alkaline tower is provided with a circulating water tank with an open upper end, the top wall of the inner cavity of the alkaline tower is provided with a spray pipe, the water inlet end of the spray pipe is communicated with the circulating water tank through a pipeline, and a circulating pump is arranged on the pipeline communicated with the circulating water tank through the spray pipe.

The circulating water tank is communicated with a dispensing tank through a pipeline, and a metering pump is installed on the pipeline for communicating the circulating water tank with the dispensing tank.

The top of the alkaline tower is communicated with the bottom of the filtering chamber, and the inner cavity of the filtering chamber is divided into a water washing defogging area arranged close to the alkaline tower and a biological filter bed area arranged close to the fan.

The biological filter bed area is provided with biological filler, the biological filler comprises ceramsite and bamboo charcoal, and the mass ratio of the ceramsite to the bamboo charcoal is 3: 1. The system does not adopt conventional organic fillers such as barks, coconut shreds and the like. On one hand, the kitchen waste gas has high content of organic components, so that enough nutrient elements can be provided; on the other hand, the organic fillers have a limited service life.

Compared with the prior art, the utility model has the advantages of:

1. through the cooling condensation of closed cooling tower to waste gas, can get rid of a large amount of vapor and take away a large amount of foul smell compositions, along with the temperature reduces, reduced the waste gas volume simultaneously, reduced subsequent processing load. The gas temperature is also reduced to the proper temperature of the microorganism in the biological deodorization tower, which is beneficial to the metabolic reaction of the microorganism. Especially in high temperature periods in summer, the cooling system will play an important role.

2. The alkali washing section is provided with an alkali adding device, the prepared alkali liquor can be pumped according to the change condition of the pH value, the stability of the pH value is maintained, the manual alkali adding operation amount is reduced, and meanwhile, the stability of the system is facilitated.

3. Ozone is unstable in water and undergoes reduction reaction all the time to produce very active monatomic oxygen with strong oxidation. The catalytic oxidation section further improves the oxidation effect by adding ozone water spraying. After the high-concentration ozone water is sprayed into mist, the ozone water is fully mixed and contacted with the flowing waste gas, so that malodorous substances in the waste gas can be quickly oxidized.

4. When the harmful gas value of the exhaust gas after detection and treatment is higher, the operation frequency of the fan can be reduced, the treatment load can be reduced, the excessive emission of the waste gas can be avoided, and meanwhile, the alarm information can be sent out. And when the relevant indexes are recovered to a lower level, the running frequency of the fan is recovered, and the alarm is released. Thereby avoiding the occurrence of the condition of excessive exhaust gas emission.

Drawings

Fig. 1 is the structure schematic diagram of the kitchen waste malodorous gas treatment system of the embodiment of the utility model.

Illustration of the drawings: 1. a cooling tower; 2. an alkaline washing tower; 3. a circulating water tank; 4. a dispensing tank; 5. a metering pump; 6. a filtering chamber; 7. a fan; 8. an ozone water washing chamber; 9. an air compressor; 10. a gas storage tank; 11. a cold dryer; 12. a first ozone generator; 13. a vapor-water mixer; 14. a water circulating pump; 15. a photo-oxidation catalytic oxidation chamber; 16. a second ozone generator; 17. an exhaust pipe; 18. a gas monitor.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example 1:

as shown in fig. 1, the kitchen waste malodorous gas treatment system of the embodiment includes a cooling tower 1, an alkaline washing tower 2, a filter chamber 6, an ozone water washing chamber 8, a photo-oxidation catalytic oxidation chamber 15 and a fan 7. The cooling tower 1, the alkaline washing tower 2, the filtering chamber 6 and the fan 7 are sequentially communicated through a pipeline, the fan 7, the ozone water washing chamber 8 and the photo-oxidation catalytic oxidation chamber 15 are sequentially communicated through a pipeline, and the filtering chamber 6 is communicated with the ozone water washing chamber 8. The photo-oxidation and catalytic oxidation chamber 15 is connected with an exhaust pipe 17, and a gas monitor 18 is arranged on the exhaust pipe 17.

And, ozone water washing chamber 8 and light oxygen catalytic oxidation chamber 15 are all communicated with ozone generating system.

The ozone generating system comprises an air compressor 9, an air storage tank 10 and a cold dryer 11 which are sequentially communicated, a first ozone generator 12 and a steam-water mixer 13 are sequentially communicated between the cold dryer 11 and the ozone water washing chamber 8, a spray pipe is arranged on the top wall of the inner cavity of the ozone water washing chamber 8 and is communicated with the steam-water mixer 13, the steam-water mixer 13 is further communicated with the ozone water washing chamber 8 through a circulating water pump 14, and a second ozone generator 16 is communicated between the cold dryer 11 and a photo-oxygen catalytic oxidation chamber 15.

In this embodiment, the lower part of 2 inner chambers of alkaline tower is equipped with upper end open-ended circulation tank 3, and the roof of 2 inner chambers of alkaline tower is equipped with the shower, and the end of intaking of shower passes through the pipeline intercommunication with circulation tank 3, is equipped with the circulating pump on the pipeline of shower and circulation tank 3 intercommunication. The circulating water tank 3 is communicated with a dispensing tank 4 through a pipeline, and a metering pump 5 is arranged on the pipeline for communicating the circulating water tank 3 with the dispensing tank 4.

The top of the alkaline tower 2 is communicated with the bottom of the filtering chamber 6, and the inner cavity of the filtering chamber 6 is divided into a washing demisting area 61 which is arranged close to the alkaline tower 2 and a biological filtering bed area 62 which is arranged close to the fan 7. The biological filter bed area is provided with biological filler, the biological filler comprises ceramsite and bamboo charcoal, and the mass ratio of the ceramsite to the bamboo charcoal is 3: 1.

The technological process for treating the malodorous gas of the kitchen waste by using the system comprises the following steps:

and under the action of the fan 7, malodorous gas in the workshop enters the closed cooling tower 1 through the air inlet pipe. The closed cooling tower 1 is internally provided with a filter layer for removing solid particles and the like in the waste gas. After the temperature of the waste gas is reduced to about 30 ℃ by the cooling action of the closed cooling tower 1, the waste gas enters the alkaline washing tower 2.

In the kitchen waste pretreatment process, a heating and cooking process exists, the heated and cooked slurry needs to be further processed, and a plurality of temporary storage tanks are needed to be temporarily stored. Therefore, the waste gas in the part has high temperature, high humidity, large amount of foul gas and high treatment difficulty. The temperature of the waste gas generated by cooking reaches above 60 ℃ by measurement. The solution is as follows: and (3) adopting a corresponding closed cooling tower according to the gas flow, cooling the part of waste gas from 60 ℃ to 35 ℃, reducing the moisture content in the gas by 3/4, carrying away a large amount of malodorous components, and simultaneously reducing the gas temperature to the proper temperature of microorganisms in the biological deodorization tower.

The bottom of the alkaline tower 2 is provided with a circulating water tank 3, and under the action of a circulating pump, alkali liquor in the circulating water tank 3 is pumped into a spraying pipeline at the top of the alkaline tower 2 to wash waste gas. A liquid level meter is arranged in the circulating water tank 3, and when the liquid level in the water tank is reduced to a certain degree, automatic water replenishing is performed. Meanwhile, a pH detector is also arranged in the water tank, when the pH of the alkali liquor is detected to be reduced to a certain degree, the concentrated alkali liquor in the dispensing tank 4 is automatically pumped into the circulating water tank 3 under the action of the metering pump 5, and the stability of the circulating water tank 3 is maintained.

In order to remove acid and odor substances in the gas, an alkaline washing spray tower is adopted for washing. When the alkaline washing spray tower operates, acidic substances in the waste gas can be neutralized, a large amount of alkali can be consumed in the process, and in order to maintain the high pH value of the circulating water, the change of the pH value needs to be noticed at any moment and the alkali needs to be added additionally. Therefore, a device for online pH monitoring and automatic alkali liquor addition is arranged for the alkaline washing spray tower, and when the pH value is lower than a set value, a certain amount of alkali liquor which is prepared by automatic pumping is pumped to maintain the pH value of the circulating water.

The washed exhaust gas is discharged from the top of the caustic tower 2 and enters from the bottom of the filter chamber 6. The filtration chamber 6 is divided into two zones, the exhaust gas first enters the water-washing demisting zone 61 on the left, the alkaline water mist is removed by water washing and demisting, and then enters the biological filter bed zone 62 on the right. The biological filter bed is divided into an upper layer and a lower layer, and each layer of filler adopts a combination form of ceramsite and bamboo charcoal = 3: 1. The system does not adopt organic fillers such as barks, coconut shreds and the like. On one hand, the kitchen waste gas has high content of organic components, so that enough nutrient elements can be provided; on the other hand, the organic fillers have a limited service life.

The waste gas treated by the biological filter bed enters an ozone water washing chamber 8 under the action of a fan 7. The ozone in the ozone water wash chamber 8 is provided by a series of devices. The screw compressor 9 compresses air into an air storage tank 10, the compressed air is dried under the action of a cold dryer 11, finally the compressed air enters a No. 1 ozone generator 12, and generated ozone is mixed with circulating water pumped by a circulating water pump 14 in a steam-water mixing pipe 13 to form ozone water. And finally, spraying the ozone water at the top of the ozone water washing chamber in a water mist mode.

Dissolving ozone in water to prepare high-concentration ozone water, spraying the ozone water into water mist through a spraying device, and fully contacting and oxidizing the water mist with waste gas to remove malodorous substances.

After being washed by ozone water, the waste gas enters a photo-oxidation catalytic oxidation chamber 15, and then the malodorous substances are further removed under the action of photocatalysis and oxidation of ozone. The ozone for the catalytic chamber is provided by ozone generator No. 2 16.

Finally, the treated exhaust gas is discharged from an exhaust pipe 17, and an on-line monitor 18 is installed on the exhaust pipe 17 to detect three indexes of hydrogen sulfide, ammonia gas and odor gas concentration. When the detected value is close to the critical emission standard (close to the set value), the system reduces the operating frequency of the fan from 50HZ to 30HZ and issues an alarm message. When the relevant indexes are restored to a lower level, the system automatically controls the running frequency of the fan to be restored and relieves the alarm.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A kitchen waste malodorous gas treatment system is characterized by comprising a cooling tower (1), an alkaline washing tower (2), a filter chamber (6), an ozone water washing chamber (8), a photo-oxygen catalytic oxidation chamber (15) and a fan (7); the cooling tower (1), the alkaline washing tower (2), the filtering chamber (6) and the fan (7) are sequentially communicated through pipelines, the fan (7), the ozone water washing chamber (8) and the photo-oxidation catalytic oxidation chamber (15) are sequentially communicated through pipelines, and the filtering chamber (6) is communicated with the ozone water washing chamber (8).

2. The kitchen waste malodorous gas treatment system according to claim 1, further comprising an ozone generation system, wherein the ozone water washing chamber (8) and the photo-oxidation catalytic oxidation chamber (15) are both communicated with the ozone generation system.

3. The kitchen waste malodorous gas treatment system according to claim 2, wherein the ozone generation system comprises an air compressor (9), an air storage tank (10) and a cold dryer (11) which are sequentially communicated, a first ozone generator (12) and a steam-water mixer (13) are sequentially communicated between the cold dryer (11) and the ozone water washing chamber (8), the steam-water mixer (13) is communicated with the ozone water washing chamber (8) through a circulating water pump (14), and a second ozone generator (16) is communicated between the cold dryer (11) and the photo-oxygen catalytic oxidation chamber (15).

4. The kitchen waste malodorous gas treatment system according to claim 3, wherein a spray pipe is arranged on the top wall of the inner cavity of the ozone water washing chamber (8), and the spray pipe is communicated with the steam-water mixer (13).

5. The kitchen waste malodorous gas treatment system according to any one of claims 1 to 3, wherein the photo-oxidation catalytic oxidation chamber (15) is connected with an exhaust pipe (17), and a gas monitor (18) is arranged on the exhaust pipe (17).

6. The kitchen waste malodorous gas treatment system according to any one of claims 1 to 3, wherein a circulating water tank (3) with an open upper end is arranged at the lower part of the inner cavity of the alkaline tower (2), a spray pipe is arranged on the top wall of the inner cavity of the alkaline tower (2), the water inlet end of the spray pipe is communicated with the circulating water tank (3) through a pipeline, and a circulating pump is arranged on the pipeline for communicating the spray pipe with the circulating water tank (3).

7. The kitchen waste malodorous gas treatment system according to claim 6, wherein the circulating water tank (3) is communicated with a dispensing tank (4) through a pipeline, and a metering pump (5) is arranged on the pipeline for communicating the circulating water tank (3) with the dispensing tank (4).

8. The kitchen waste malodorous gas treatment system as claimed in any one of claims 1 to 3, wherein the top of the caustic tower (2) is communicated with the bottom of a filtering chamber (6), and the inner cavity of the filtering chamber (6) is divided into a water washing defogging area (61) arranged near the caustic tower (2) and a biological filtering bed area (62) arranged near the fan (7).