CN215712468U - Deodorizing device of landfill leachate treatment system - Google Patents

Abstract

The utility model discloses a deodorization device of a landfill leachate treatment system, wherein the landfill leachate treatment system comprises a regulating tank, a denitrification tank, a nitrification tank and an MBR tank which are sequentially connected, wherein the bottom of the nitrification tank is provided with a first aeration part, the bottom of the MBR tank is provided with a second aeration part, the first aeration part and the second aeration part are connected to the aeration system, the regulating tank and the denitrification tank are connected to a first odor collecting system, and the first odor system is connected to an odor aeration part in the nitrification tank; nitrify pond, MBR pond and be connected to second foul smell collecting system, second foul smell collecting system is connected to deodorization system. The utility model provides a landfill leachate processing system's deodorizing device can high-efficiently get rid of the foul smell, reduces the running cost.

Description

Deodorizing device of landfill leachate treatment system

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to a deodorization device of a garbage leachate treatment system.

Background

Malodorous gas is generated in the process of treating the landfill leachate, and malodorous sources mainly comprise a regulating tank, a primary sedimentation tank, a denitrification tank, a sludge dewatering room and the like. The malodorous gas generated in the treatment process mainly comprises the following components: nitrogen-containing compounds such as ammonia, amines, etc.; sulfur-containing compounds such as hydrogen sulfide, methyl mercaptan, etc.; halogens and derivatives such as chlorine, halogenated hydrocarbons, etc.; hydrocarbons and aromatic hydrocarbons; oxygen-containing compounds such as alcohols, phenols, etc.; and small amounts of Volatile Organic Compounds (VOCs). If the malodorous gas is directly discharged without treatment, the malodorous gas not only causes unpleasant sensation, but also threatens human health and deteriorates the working environment and the surrounding environment of a factory.

The garbage incineration plant mostly adopts incineration treatment for treating malodorous gas, adopts a structure that a malodorous gas source is covered or closed, the top of the tank is provided with a malodorous gas pipe, the malodorous gas pipe is led to the inlet of a centrifugal fan and sent to a negative pressure area of a garbage pit bank to enter a garbage incinerator for incineration treatment; the odor of the kitchen garbage treatment plant is generally controlled by adopting a mode of combining chemical washing and biological deodorization, a malodorous gas source is collected in a closed space, negative pressure collection is adopted for centralized washing and deodorization, and then a biological deodorization method is adopted for treatment. Generally, the malodorous gas is treated in a mode of an odor collecting system and a deodorization system, wherein the odor collecting system mainly utilizes an air exhaust fan to perform negative pressure suction; the deodorization system is selected according to the treatment process, and mainly comprises a combustion method, a biological deodorization method, a chemical liquid washing method, an ozone oxidation method, an activated carbon adsorption method and the like. However, these methods have their own drawbacks. The combustion method and the chemical liquid washing method are used as main treatment processes for treating odor, the operation cost (fuel cost and medicament cost) is high, and the secondary pollution problems (high nitrogen oxide emission and acid-base waste liquid) exist; the ozone oxidation method utilizes ozone to oxidize and decompose malodorous substances in the odor, can remove low-concentration odor, but has low ammonia decomposition capability and secondary pollution hidden danger (residual ozone); the active carbon adsorption method can adapt to odor with any concentration, but needs to replace or regenerate the active carbon regularly, and is suitable for being used as a guarantee system; although the biological method oxidatively decomposes odorous substances such as sulfides and ammonia by utilizing the metabolic function of aerobic microorganisms such as oxidizing bacteria and nitrifying bacteria, the operation management is highly safe and the operation management cost is low, the biological method is not suitable for low-temperature cold regions due to the limitation of the growth characteristics of the microorganisms, and has the problems that the biological method requires domestication time during initial test operation and re-domestication after long-time shutdown, and the like, and the development of the biological method is limited to a certain extent.

Disclosure of Invention

The utility model aims to provide a deodorizing device of a landfill leachate treatment system, which can efficiently treat odor generated by the landfill leachate treatment system and has low operation cost.

Based on the problems, the technical scheme provided by the utility model is as follows:

a deodorization device of a landfill leachate treatment system, the landfill leachate treatment system comprises a regulating tank, a denitrification tank, a nitrification tank and an MBR tank which are connected in sequence, wherein a first aeration part is arranged at the bottom of the nitrification tank, a second aeration part is arranged at the bottom of the MBR tank, the first aeration part and the second aeration part are connected to an aeration system, the regulating tank and the denitrification tank are connected to a first odor collecting system, and the first odor system is connected to an odor aeration part in the nitrification tank; nitrify pond, MBR pond and be connected to second foul smell collecting system, second foul smell collecting system is connected to deodorization system.

In some of them embodiments, first foul smell collection system includes first foul smell fan, first collection house steward, connects first collection house steward with the first collection branch pipe of equalizing basin, connect first collection house steward with the branch pipe is collected to the second in denitrification pond, and connects first foul smell fan with the first foul smell discharge pipe of foul smell aeration part, be equipped with first blast gate on the first collection branch pipe, be equipped with the second blast gate on the second collection branch pipe, be equipped with the third blast gate on the first collection house steward, be equipped with the fourth blast gate on the first foul smell discharge pipe.

In some of them embodiments, the second foul smell collection system includes that second foul smell fan, second collect house steward, connection the second collect house steward with nitrify the third of pond and collect branch pipe, connection the second collect house steward with the fourth in MBR pond collects the branch pipe and connects the second foul smell fan with deodorization system's second foul smell discharge pipe, the third is collected and is equipped with the fifth blast gate on the branch pipe, the fourth is collected and is equipped with the sixth blast gate on the branch pipe, the second is collected and is equipped with the seventh blast gate on the house steward, be equipped with the eighth blast gate on the second foul smell discharge pipe.

In some embodiments thereof, the aeration system comprises an aeration fan, an aeration main, a first aeration branch connecting the aeration main with the first aeration part, and a second aeration branch connecting the aeration main with the second aeration part;

a first aeration valve is arranged on the first aeration branch pipe, and a dissolved oxygen meter is arranged in the nitrification tank;

a second aeration valve and an aeration flowmeter are sequentially arranged on the second aeration branch pipe along the airflow direction;

and a pressure gauge, a check valve and a third aeration valve are sequentially arranged on the aeration main pipe along the airflow direction.

In some of these embodiments, the outlet of the deodorizing system is connected to a chimney.

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

1. a large amount of odor generated by a front-end structure of a landfill leachate treatment system is conveyed to a biochemical system for treatment, the adsorption and degradation effects of aerobic microorganisms are fully exerted, malodorous gas which is easily dissolved in water and can be biologically degraded is treated, the operation pressure of a subsequent deodorization system is reduced, the operation cost is reduced, the odor which is easily dissolved in water and can be degraded by microorganisms is removed by the aerobic microorganisms, the system is stable in operation, only nitrification tank microorganisms need to be operated and maintained, the microorganisms do not need to be repeatedly domesticated, the growth characteristic of the microorganisms is not limited, and secondary pollutants are not generated;

2. a large amount of odor generated by the front-end structure is introduced into the nitrification tank, so that the dissolved oxygen of the nitrification tank is increased, the microbial activity is improved, the sewage treatment efficiency is improved, the aeration quantity of the aeration fan can be reduced, the equipment cost is saved, and the operation cost is reduced;

3. pollutants in the odor are dissolved in water and then decomposed by microorganisms of a biochemical system, and the rest escaped odor is collected and then enters a conventional deodorization system for continuous treatment, so that on the premise of not influencing a landfill leachate treatment system, a landfill leachate treatment facility is utilized to achieve the purpose of removing most of malodorous pollutants, and the operation cost of the deodorization system is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a deodorizing device of a landfill leachate treatment system according to the present invention;

wherein:

1. a regulating tank; 2. a denitrification tank; 3. a nitrification tank; 4. an MBR tank; 5. a first aeration section; 6. a second aeration section; 7. an MBR membrane module; 8. a first collecting branch pipe; 9. a second collecting branch pipe; 10. a first collection header; 11. a first odor fan; 12. a first odor outlet pipe; 13. a first air valve; 14. a second air valve; 15. a third air valve; 16. a fourth air valve; 17. a third collecting branch pipe; 18. a fourth collecting branch pipe; 19. a second collection manifold; 20. a second odor fan; 21. a second odor outlet pipe; 22. a fifth air valve; 23. a sixth air valve; 24. a seventh air valve; 25. an eighth air valve; 26. a first aeration branch pipe; 27. a second aeration branch pipe; 28. an aeration main pipe; 29. an aeration fan; 30. a first aeration valve; 31. a second aeration valve; 32. a pressure gauge; 33. a check valve; 34. a third aeration valve 35, a dissolved oxygen instrument 36, an aeration flow meter 37, a deodorization system 38, a chimney 39 and an odor aeration component.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1, a schematic structural diagram of the present invention provides a deodorization apparatus for a landfill leachate treatment system, the landfill leachate treatment system includes a regulating tank 1, a denitrification tank 2, a nitrification tank 3, and an MBR tank 4, which are connected in sequence, a first aeration part 5 is disposed at the bottom of the nitrification tank 3, a second aeration part 6 is disposed at the bottom of the MBR tank 4, the first aeration part 5 and the second aeration part 6 are connected to an aeration system, an MBR membrane module 7 is disposed in the MBR tank 4, and the MBR membrane module 7 is connected to a water production system. The water production system is the prior art, and the utility model is not described in detail.

In order to efficiently remove the odor generated by the landfill leachate treatment system, the adjusting tank 1 and the denitrification tank 2 are connected to a first odor collecting system, and the first odor collecting system is connected to an odor aeration component 39 in the nitrification tank 3; the nitrification tank 3, the MBR tank 4 are connected to a second odor collection system, which is connected to a deodorization system 37. The deodorization system 37 is the original treatment equipment of the landfill leachate treatment system, and can be a biological deodorization method, a chemical agent washing method, an ozone oxidation method or an activated carbon adsorption method. The outlet of the deodorising system 37 is connected to a chimney 38.

Specifically, first foul smell collection system includes first foul smell fan 11, first collection house steward 10, connect first collection house steward 10 and the first collection branch 8 of equalizing basin 1, connect the second collection branch 9 of first collection house steward 10 and denitrification pond 2, and connect first foul smell fan 11 and the first foul smell discharge pipe 12 of foul smell aeration part 39, be equipped with first blast gate 13 on first collection branch 8, be equipped with second blast gate 14 on the second collection branch, be equipped with third blast gate 15 on first collection house steward 10, be equipped with fourth blast gate 16 on first foul smell discharge pipe 12. The first odor fan 11 can adopt a centrifugal fan, and the air exchange times can be 4 times/h-6 times/h.

A large amount of odor generated by the adjusting tank 1 and the denitrification tank 2 is collected and then is introduced into the nitrification tank 3, the odor is contacted with water and dissolved in the water, organic substances in the odor are transferred into a liquid phase (or a solid surface liquid film) from a gas phase, odor components in the liquid phase (or a solid surface biological layer) are adsorbed and absorbed by microorganisms, the odor components are oxidized, decomposed and synthesized by the microorganisms as nutrient substances, a part of generated metabolic products are dissolved into the liquid phase, a part of the generated metabolic products are used as cell substances or cell metabolic energy, and a part of the odor (such as CO) which is not degraded by the microorganisms is also collected₂Etc.) are precipitated into the air.

The second odor collecting system comprises a second odor fan 20, a second collecting main pipe 19, a third collecting branch pipe 17 connecting the second collecting main pipe 19 with the nitrification tank 3, a fourth collecting branch pipe 18 connecting the second collecting main pipe 19 with the MBR tank 4, and a second odor discharge pipe 21 connecting the second odor fan 20 with the deodorization system 37, wherein a fifth air valve 22 is arranged on the third collecting branch pipe 17, a sixth air valve 23 is arranged on the fourth collecting branch pipe 18, a seventh air valve 24 is arranged on the second collecting main pipe 19, and an eighth air valve 25 is arranged on the second odor discharge pipe 21. The odor generated by the nitrification tank 3 and the MBR tank 4 is collected and then is introduced into the deodorization system 37 for treatment, and a large amount of odor generated by the front-stage structure is biochemically treated by the nitrification tank 3, so that the operation pressure of the subsequent deodorization system can be reduced, and the operation cost can be reduced.

The aeration system comprises an aeration fan 29, an aeration main pipe 28, a first aeration branch pipe 26 for connecting the aeration main pipe 28 with the first aeration part 5, and a second aeration branch pipe 27 for connecting the aeration main pipe 28 with the second aeration part 6; a first aeration valve 30 is arranged on the first aeration branch 26, a dissolved oxygen instrument 35 is arranged in the nitrification tank 3, and the concentration of dissolved oxygen in the nitrification tank 3 is kept to be 2-4 mg/L through the linkage of the dissolved oxygen instrument 35 and the aeration fan 29; the second aeration branch pipe 27 is sequentially provided with a second aeration valve 31 and an aeration flowmeter 36 along the airflow direction; the aeration main pipe 28 is provided with a pressure gauge 32, a check valve 33 and a third aeration valve 34 in sequence along the air flow direction. In this example, the first aeration means 5, the second aeration means 6 and the odor aeration means 39 may be microporous aerators, cyclone aerators or jet aerators as known in the art.

The working principle of the utility model is as follows: the leachate enters a regulating tank 1 for homogenizing and equalizing, then enters a biochemical system, part of pollutants are further decomposed and degraded in a denitrification tank 2 through facultative bacteria, part of CODcr is removed, denitrification is carried out simultaneously, nitrate and nitrite are converted into nitrogen, the biological denitrification function is achieved, effluent of the denitrification tank 2 automatically flows to a nitrification tank 3, a large amount of aerobic bacteria further decompose and degrade most of the pollutants, most of CODcr is removed, and nitrification is carried out simultaneously. Effluent of the nitrification tank 3 enters an MBR tank 4, and effluent of the MBR tank 4 enters a subsequent treatment system according to effluent requirements. A large amount of odor generated by the adjusting tank 1 and the denitrification tank 2 enters the odor aeration part 39 in the nitrification tank 3 after being collected by the first odor collection system, pollutants in the odor are removed through the adsorption and degradation of aerobic microorganisms in the nitrification tank 3, and the odor generated by the nitrification tank 3 and the MBR tank 4 is collected by the second odor collection system and then is introduced into the subsequent deodorization system 37 for deodorization treatment.

The above examples are only for illustrating the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (5)

1. The utility model provides a landfill leachate processing system's deodorizing device, landfill leachate processing system is including equalizing basin, denitrification pond, nitration pond and the MBR pond that connects gradually, nitrify the bottom of the pool and be equipped with first aeration part, MBR bottom of the pool portion is equipped with second aeration part, first aeration part, second aeration part are connected to aeration system, its characterized in that: the regulating tank and the denitrification tank are connected to a first odor collecting system, and the first odor system is connected to an odor aeration part in the nitrification tank; nitrify pond, MBR pond and be connected to second foul smell collecting system, second foul smell collecting system is connected to deodorization system.

2. The deodorization apparatus for landfill leachate treatment system according to claim 1, wherein: first foul smell collection system includes first foul smell fan, first collection house steward, connection first collection house steward with the first collection branch pipe, the connection of equalizing basin first collection house steward with the branch pipe is collected to the second in denitrification pond, and is connected first foul smell fan with the first foul smell discharge pipe of foul smell aeration part, be equipped with first blast gate on the first collection branch pipe, be equipped with the second blast gate on the second collection branch pipe, be equipped with the third blast gate on the first collection house steward, be equipped with the fourth blast gate on the first foul smell discharge pipe.

3. The deodorization apparatus for landfill leachate treatment system according to claim 1, wherein: second foul smell collecting system includes that second foul smell fan, second collect house steward, connection the second collect house steward with nitrify the third in pond and collect branch pipe, connection the second collect house steward with the fourth in MBR pond is collected the branch pipe and is connected the second foul smell fan with deodorization system's second foul smell discharge pipe, the third is collected and is equipped with the fifth blast gate on the branch pipe, the fourth is collected and is equipped with the sixth blast gate on the branch pipe, the second is collected and is equipped with the seventh blast gate on the house steward, be equipped with the eighth blast gate on the second foul smell discharge pipe.

4. The deodorization apparatus for landfill leachate treatment system according to claim 1, wherein: the aeration system comprises an aeration fan, an aeration main pipe, a first aeration branch pipe for connecting the aeration main pipe with the first aeration part, and a second aeration branch pipe for connecting the aeration main pipe with the second aeration part;

a first aeration valve is arranged on the first aeration branch pipe, and a dissolved oxygen meter is arranged in the nitrification tank;

a second aeration valve and an aeration flowmeter are sequentially arranged on the second aeration branch pipe along the airflow direction;

and a pressure gauge, a check valve and a third aeration valve are sequentially arranged on the aeration main pipe along the airflow direction.

5. The deodorization apparatus for landfill leachate treatment system according to claim 1, wherein: the outlet of the deodorizing system is connected to a chimney.

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