Deodorization device suitable for organic waste gas

Abstract

The utility model provides a deodorization device suitable for organic waste gas, which relates to the technical field of waste gas treatment and comprises a gas inlet, a liquid pool, a flow guide structure, a liquid circulation module and a filler layer, the gas inlet is arranged in the liquid pool and is positioned below the liquid level in the liquid pool, and the flow guide structure is arranged in the liquid pool and is positioned below the liquid level in the liquid pool. The gas inlet is arranged below the liquid level of the liquid, and the flow guide structure is arranged, so that the flowing path of the liquid and the gas is guided, the flowability of the liquid and the gas is improved, the gas entering through the gas inlet is fully mixed with the liquid, and the absorption efficiency of organic pollutants is improved. Meanwhile, the mixed liquid is sprayed to the filler layer, so that the mass transfer efficiency of organic pollutants to microorganisms is improved, and the treatment effect of the microorganisms on the organic waste gas is improved; according to the scheme, the reabsorption layer is further arranged, organic pollutants which are not degraded by microorganisms on the filler layer are absorbed again through the reabsorption layer, and the organic waste gas is deeply purified.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field especially a kind of deodorization device suitable for organic waste gas. BACKGROUND

[0002] With the development of modern industry, the emission of waste gas containing volatile organic compounds is increasing. Current organic waste gas treatment methods can be divided into physical method, chemical method, biological method. Among them, biological method is based on the metabolic mechanism of microorganisms to purify organic waste gas, with the advantages of simple operation, less secondary pollution, low investment and operation cost.

[0003] Traditional biological method has poor treatment effect on poorly water-soluble pollutants, however, most pollutants in organic waste gas have strong hydrophobicity, which often leads to low biological treatment effect. To overcome the above-mentioned defects, the present application is proposed. SUMMARY

[0004] The utility model aims at providing a kind of deodorization device suitable for organic waste gas, by reasonably constructing double medium system, improve the mass transfer efficiency of hydrophobic pollutants, improve the treatment efficiency of biological method, solve the problem of poor treatment effect of traditional biological method on poorly water-soluble pollutants.

[0005] To solve the above problems, the utility model provides a kind of deodorization device suitable for organic waste gas, including air inlet, liquid pool, flow guide structure, liquid circulation module and filler layer, the air inlet is arranged in liquid pool, below the liquid surface in liquid pool, the flow guide structure is arranged in liquid pool, by guiding liquid gas flow path, improve the fluidity of liquid gas, make the gas entering through air inlet and liquid fully mixed, the liquid circulation module is used to extract liquid in liquid pool, the extracted liquid enters the filler layer, since liquid absorbs part of organic pollutants, therefore, when liquid is sprayed to filler layer, the mass transfer efficiency of organic pollutants to microorganisms can be increased, so as to improve the treatment effect of microorganisms on organic waste gas.

[0006] According to an embodiment of the utility model, the flow guide structure includes two or more groups of vertically arranged flow guide plates, the flow guide plates are arranged on both sides of air inlet respectively, an inner channel is formed between two flow guide plates, the gas flows from bottom to top in the inner channel after bubbling at the bottom of liquid pool, the liquid in the inner channel is driven to flow from bottom to top, while the liquid outside the inner channel flows from top to bottom, to make up the loss of liquid at the bottom of inner channel, so as to realize the full mixing of gas and liquid, and increase the absorption efficiency of liquid to pollutants in gas.

[0007] Preferably, the ratio of inner channel formed by flow guide plate to overall space is 0.5~0.7:1.

[0008] According to the embodiment of the present application, the upper side of the filler layer is provided with a resorption layer, the resorption layer comprises a gas-permeable membrane layer and a liquid layer, the gas-permeable membrane layer allows gas to pass through but does not allow liquid to pass through, the organic contaminated waste gas which is not degraded by microorganisms on the filler layer is resorbed again through the resorption layer, and the organic waste gas is deeply purified.

[0009] Optionally, the special material is usually PTFE film, polypropylene film or silica gel film, etc.

[0010] Further, the liquid in the liquid pool is a double-medium liquid composed of water phase and organic phase, and the liquid in the liquid layer of the resorption layer is composed of organic phase; the type of the organic phase in the resorption layer is the same as that in the liquid pool at the bottom of the biological trickling filter device.

[0011] Preferably, the proportion of the organic phase in the double-medium liquid ranges from 5% to 15%. The organic phase is usually silicone oil, hexadecane, dodecane, etc., and the most commonly used one is silicone oil.

[0012] According to the embodiment of the present application, the liquid layer in the resorption layer is connected with the liquid pool, after the organic phase absorption liquid in the liquid layer of the resorption layer is absorbed for a period of time, the liquid is sent to the liquid pool at the bottom of the biological trickling filter device through a pipeline, mixed with the liquid in the liquid pool, and the organic matter is further degraded.

[0013] According to the embodiment of the present application, the liquid layer in the resorption layer is connected with the liquid supplement module, and the organic phase absorption liquid in the liquid layer of the resorption layer is supplemented by the liquid supplement module after being reduced.

[0014] According to the embodiment of the present application, the deodorization device suitable for organic waste gas further comprises an air outlet, and the gas passing through the resorption layer is discharged through the air outlet.

[0015] According to the embodiment of the present application, the air outlet is connected with a monitor and an exhaust cylinder.

[0016] According to the embodiment of the present application, the air inlet is connected with an air inlet pipeline, and the cross-sectional area of the air inlet is greater than that of the air inlet pipeline.

[0017] According to the embodiment of the present application, the liquid circulation module comprises a circulating pump, a spraying pipeline and a spray head, and the spray head sprays liquid to the filler layer.

[0018] According to the embodiment of the present application, a floating body is arranged on the liquid surface of the liquid in the liquid pool.

[0019] Optionally, the floating body is a plastic ball, which is used to reduce the foam caused by the liquid falling from the filler layer.

[0020] The utility model discloses an advantageous effect is, through setting up the air inlet below the liquid level of liquid, and setting up the flow guide structure, guide liquid gas flow path, improve the liquidity of liquid gas, make the gas that enters through the air inlet and liquid fully mix, increased the absorption efficiency of organic pollutant. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further explained below in connection with the drawings and examples.

[0022] Figure 1 For the overall structure schematic diagram of deodorization device suitable for organic waste gas. DETAILED DESCRIPTION

[0023] The following description is only for disclosing the utility model to enable the person skilled in the art to carry out the utility model. The examples in the following description are only as examples, and the person skilled in the art can think of other obvious modifications. The basic principles of the utility model defined in the following description can be applied to other implementation, modification, improvement, equivalent and other schemes without departing from the spirit and scope of the utility model.

[0024] Example 1:

[0025] A kind of deodorization device suitable for organic waste gas, such as Figure 1 , including air inlet pipe 1, air inlet 2, liquid pool 22, flow guide structure 3, liquid circulation module, filler layer 10, reabsorption layer 11, air outlet 17, monitor 20 and exhaust cylinder 21.

[0026] Liquid pool 22, flow guide structure 3, filler layer 10, reabsorption layer 11 are all set in biological trickling filter equipment main body, wherein liquid pool 22 is located at the bottom of biological trickling filter equipment main body, liquid in liquid pool 22 adopts the double medium liquid composed of water phase and organic phase, filler layer 10 and reabsorption layer 11 are sequentially arranged above liquid pool 22, air outlet 17 is set at the top of biological trickling filter equipment main body, the purified gas through reabsorption layer 11 is discharged through air outlet 17, air outlet 17 is connected with monitor 20 and exhaust cylinder 21, monitor 20 is preferably online monitor.

[0027] The liquid level of liquid in liquid pool 22 is provided with float 19, and in the embodiment, float 19 is plastic ball, which is used to reduce the foam caused by the falling of liquid (especially organic phase) from filler layer.

[0028] After the exhaust gas is collected, it enters the bio-trickling filter device through the air inlet pipe 1. Unlike the conventional air inlet mode, this air inlet pipe 1 is inserted downward into the inside of the liquid pool 22 below the liquid level of the double medium liquid (close to the bottom of the device). The cross-sectional area of the pipe is increased at the exhaust gas inlet 2, which reduces the gas flow rate in the pipe, increases the contact time with the liquid phase, and makes the gas distribution more uniform and mixed with the liquid phase more uniformly.

[0029] The flow guide structure 3 includes two groups of vertically arranged flow guide plates, which are arranged on the two sides of the air inlet 2. The inner channel is formed between the two flow guide plates, and the proportion of the inner channel formed by the flow guide plates to the whole space is 0.5-0.7:1. After the gas is bubbled at the bottom of the liquid pool 22, it flows upward in the inner channel, driving the liquid in the inner channel to flow upward, while the liquid outside the inner channel flows downward, replenishing the loss of liquid at the bottom of the inner channel, thereby realizing the full mixing of gas and liquid and increasing the absorption efficiency of the liquid to the pollutants in the gas.

[0030] The liquid circulation module includes a mixed liquid tank 4, a circulating pump 5, a pipe valve 1 6, a flow meter 1 7, a spray pipe 8, and a spray head 9. The spray pipe 8 is located above the filler layer 10, and the spray head 9 is connected with the spray pipe 8 for spraying liquid to the filler layer 10.

[0031] The liquid circulation module is used to extract the liquid in the liquid pool 22, and the extracted liquid enters the filler layer 10. Since the liquid has absorbed part of the organic pollutants, when the liquid is sprayed to the filler layer 10, the mass transfer efficiency of the organic pollutants to the microorganisms can be increased (the liquid-liquid mass transfer efficiency is much greater than the gas-liquid mass transfer efficiency), thereby improving the treatment effect of the microorganisms on the organic exhaust gas.

[0032] Preferably, the pipe valve 1 6 is a one-way valve to prevent backflow of the liquid.

[0033] The resorption layer 1 1 includes a gas-permeable membrane layer and a liquid layer. The gas-permeable membrane layer allows gas to pass through but not liquid. The organic exhaust gas passing through the resorption layer allows the organic pollutants that have not been degraded by the microorganisms on the filler layer to be reabsorbed, thereby deeply purifying the organic exhaust gas.

[0034] Optionally, the special material is usually PTFE film, polypropylene film, or silica gel film, etc.

[0035] The liquid layer of the resorption layer 1 1 contains an organic phase, which is the same as the organic phase of the liquid pool 22.

[0036] Preferably, the proportion of the organic phase in the double medium liquid ranges from 5% to 15%. The organic phase is usually silicone oil, hexadecane, dodecane, etc., and the most commonly used one is silicone oil.

[0037] The double medium composition can better cope with the fluctuation of pollutants in the organic waste gas. When the concentration of pollutants in the waste gas increases, the organic phase will dissolve the excess organic pollutants (the organic phase plays a buffering and storage role), reducing the concentration of pollutants in the waste gas passing through the filler layer, effectively protecting the microorganisms in the filler layer from the influence of high-concentration pollutants; when the concentration of pollutants in the waste gas decreases, the pollutants stored in the organic phase will be released into the aqueous phase, ensuring that the microorganisms have sufficient energy sources, thereby reducing the impact of concentration changes on the microorganisms.

[0038] The liquid layer in the resorption layer 11 is connected with the liquid pool 22, specifically, the liquid layer and the liquid pool 22 are connected through a pipeline, and a pipeline valve three 16 is arranged on the pipeline. After the organic phase absorption liquid in the liquid layer in the resorption layer 11 is absorbed for a period of time, the organic phase absorption liquid is sent to the liquid pool 22 at the bottom of the biological trickling filter device through the pipeline, and is mixed with the liquid in the liquid pool 22, so that the organic matter is further degraded.

[0039] Embodiment 2:

[0040] On the basis of embodiment 1, the liquid layer in the resorption layer 11 is connected with the liquid supplementing module, and the organic phase absorption liquid in the liquid layer in the resorption layer 11 is supplemented by the liquid supplementing module when the organic phase absorption liquid is reduced.

[0041] Specifically, the liquid supplementing module comprises an organic solvent tank 12, a pump body 13, a pipeline, a pipeline valve two 14 and a flowmeter two 15. The pipeline valve two 14 is a one-way valve, which prevents liquid backflow. When the organic phase absorption liquid in the resorption layer is reduced, the organic solution is pumped from the organic solvent tank 12 to the resorption layer.

[0042] Preferably, a differential pressure gauge 18 is arranged on the main body of the biological trickling filter device, and the differential pressure gauge 18 is used to monitor the pressure difference in the device. The height of the liquid level of the organic phase in the resorption layer can be adjusted according to the reading of the differential pressure gauge 18.

[0043] It should be understood by those skilled in the art that the above description and the embodiments of the utility model shown in the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been shown and explained in the embodiments, and the implementation of the utility model can be any deformation and modification without departing from the principle.

Claims

1. A deodorizing device for organic waste gas, characterized by comprising: The device comprises an air inlet (2), a liquid pool (22), a flow guide structure (3), a liquid circulation module and a filler layer (10), the air inlet (2) is arranged in the liquid pool (22) and below the liquid level in the liquid pool (22), the flow guide structure (3) is arranged in the liquid pool (22) and is used for improving the flowability of the liquid, so that the gas entering through the air inlet (2) is fully mixed with the liquid, and the liquid circulation module is used for extracting the liquid in the liquid pool (22), and the extracted liquid enters the filler layer (10).

2. The deodorizing device for organic exhaust gas according to claim 1, characterized by: The flow guide structure (3) comprises at least two groups of flow guide plates, and the two groups of flow guide plates are arranged on the two sides of the air inlet (2) respectively.

3. The deodorizing device for organic exhaust gas according to claim 1 or 2, characterized by: A resorption layer (11) is arranged on the upper side of the filler layer (10), and the resorption layer (11) comprises a gas-permeable film layer and a liquid layer.

4. The deodorizing device for organic exhaust gas according to claim 3, characterized by: The liquid in the liquid pool (22) is a bimedium liquid composed of a water phase and an organic phase, and the liquid in the liquid layer of the resorption layer (11) is composed of the organic phase.

5. The deodorizing device for organic exhaust gas according to claim 4, characterized by: The liquid layer in the resorption layer (11) is connected with the liquid pool (22).

6. The deodorizing device for organic exhaust gas according to claim 5, wherein: The liquid layer in the resorption layer (11) is connected with a liquid supplementing module.

7. The deodorizing device for organic exhaust gas according to any one of claims 4 to 6, characterized by: The device suitable for deodorizing organic waste gas further comprises an air outlet (17), the gas passing through the resorption layer (11) is discharged through the air outlet (17), and the air outlet (17) is connected with a monitor (20) and an exhaust pipe (21).

8. The deodorizing device for organic exhaust gas according to claim 1 or 2, characterized by: The air inlet (2) is connected with an air inlet pipeline (1), and the cross-sectional area of the air inlet (2) is greater than that of the air inlet pipeline (1).

9. The deodorizing device for organic exhaust gas according to claim 1, characterized by: The liquid circulation module comprises a circulating pump (5), a spraying pipeline (8) and a spray head (9), and the spray head (9) sprays the liquid to the filler layer (10).

10. The deodorizing device for organic exhaust gas according to any one of claims 4 to 6, characterized by: A floating body (19) is arranged on the liquid level of the liquid in the liquid pool (22).

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