3D-BER trickling filtration device for purifying hydrophobic organic waste gas

Abstract

The 3D-BER trickling filtration device comprises a reactor, a plurality of porous partition plates and a nutrient solution supply mechanism, a gas inlet pipe and a gas outlet pipe are arranged on the reactor in a communicated mode, a waste gas collection mechanism is arranged at the position of the gas inlet pipe, the nutrient solution supply mechanism is communicated with the upper end and the lower end of the reactor respectively, and the porous partition plates are arranged on the porous partition plates. The reactor is divided into a plurality of layers of reaction areas by a plurality of porous partition plates, microbial fillers are stacked on the porous partition plates, each layer of reaction area is provided with an operation opening and an electrochemical assembly, and waste gas is collected into the reactor through a waste gas collection mechanism, conveyed to the bottom of the reactor from the top of the reactor and discharged through a gas outlet pipe. Harmful substances in waste gas are decomposed in a bio-trickling filtration mode through cooperation of the microbial filler and the nutrient solution supply mechanism, the activity of microorganisms is improved through current and a magnetic field formed by the electrochemical assembly so as to further improve the degradation effect of the microorganisms, and the advantages of high purification capacity and high purification efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to a 3D-BER trickling filter device for purifying hydrophobic organic waste gas. Background Art

[0002] As an important type of air pollutant, most of the VOCs are hydrophobic and have a very low olfactory threshold (the lowest olfactory concentration of odor), which can easily cause odor pollution, one of the world's environmental hazards. At the same time, under unfavorable meteorological conditions such as strong sunshine, high temperature and little cloud cover, VOCs and NO emitted by various pollution sources can x and SO x Photochemical reactions occur in the air to generate PM 2.5 Fine particles and O3, which in turn form atmospheric complex pollution and environmental haze, seriously endangering people's health. Existing physical adsorption, advanced oxidation and biotechnology can effectively treat organic waste gas to a certain extent, but a single technology has different defects, such as secondary treatment and secondary pollution of adsorbents used in adsorption technology, high energy consumption and many by-products in the degradation process of advanced oxidation technology, and biotechnology is greatly affected by the nature of organic waste gas. Compared with physical adsorption and advanced oxidation technology, biotechnology has the advantages of low energy consumption and good treatment effect in the process of treating hydrophilic organic waste gas, but the current biotechnology requires too long a gas residence time to treat waste gas and has low efficiency and ability to treat high-concentration hydrophobic pollutants, that is, there are problems of low purification efficiency and weak purification ability.

[0003] In view of the above technical problems, the inventors proposed a 3D-BER trickling filter device for purifying hydrophobic organic waste gas to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the above-mentioned technology and to propose a 3D-BER trickling filter device for purifying hydrophobic organic waste gas, aiming to solve the above-mentioned problems.

[0005] The utility model provides a 3D-BER trickling filter device for purifying hydrophobic organic waste gas, comprising a reactor, a plurality of porous partitions and a nutrient solution supply mechanism, wherein an air inlet pipe is connected to the top of the reactor, an air outlet pipe is connected to the bottom of the reactor, a waste gas collecting mechanism is arranged at the air inlet pipe, a plurality of the porous partitions are arranged in a longitudinal array in the inner cavity of the reactor and divide the reactor into a plurality of layers of reaction zones, the nutrient solution supply mechanism is respectively connected to the upper and lower ends of the reactor and is used to provide nutrient solution to each of the reaction zones, microbial fillers are stacked on the porous partitions, an operating port and an electrochemical component are provided in each layer of the reaction zone, the electrochemical component comprises a cathode and an anode, the cathode and the anode are electrically connected to an external power supply through a wire, the cathode and the anode are both detachably installed at the reaction zone, and a sealing door is rotatably provided at the operating port.

[0006] Preferably, the anode is cylindrical and can be detachably mounted at the center of the porous partition, and the cathode is sheet-shaped and can be detachably mounted on the inner wall of the reactor.

[0007] Preferably, a mounting tube for placing the anode is provided on the porous partition plate, a plurality of through holes are provided on the mounting tube, a curved first conductive sheet is provided at the bottom of the mounting tube, a wire is connected to the first conductive sheet, an end cover is threadedly provided on the mounting tube, and the end cover is used to press the anode onto the first conductive sheet.

[0008] Preferably, the reactor is provided with a slot for inserting the cathode, a bent second conductive sheet is provided at the slot, the second conductive sheet elastically abuts against the cathode, and a wire is connected to the second conductive sheet.

[0009] Preferably, the nutrient solution supply mechanism includes a liquid storage tank, a circulation pump, a liquid outlet pipe and a recovery pipe, the liquid outlet pipe is connected and arranged at the top of the reactor, the recovery pipe is connected and arranged at the bottom of the reactor, the liquid storage tank is connected with the liquid outlet pipe and the recovery pipe respectively, the circulation pump is arranged on the liquid outlet pipe, and valves are arranged on the liquid outlet pipe and the recovery pipe.

[0010] Preferably, a water distributor is provided on the liquid outlet pipe, and a plurality of nozzles are provided on the water distributor.

[0011] Preferably, each of the reaction zones is connected to a gas sampling tube, and a valve is provided on the gas sampling tube.

[0012] Preferably, the microbial filler comprises a carbon material doped with a magnetic electron mediator.

[0013] Preferably, the reactor has a cylindrical structure.

[0014] Preferably, the exhaust gas collecting mechanism comprises a collecting hood and an air pump, the collecting hood is arranged at the end of the air intake pipe, and the air pump is arranged on the air intake pipe.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The waste gas is collected into the reactor by the waste gas collection mechanism and transported from the top of the reactor to the bottom of the reactor and discharged through the exhaust pipe. In this process, harmful substances in the waste gas are decomposed by bio-trickling through the microbial filler in cooperation with the nutrient solution supply mechanism, and the activity of the microorganisms is increased by the current and magnetic field formed by the electrochemical components to further enhance the degradation effect of the microorganisms, thereby having the advantages of high purification capacity and high purification efficiency. The operator can sample the filler from the operation port as needed, and disassemble and replace the cathode and anode, which is beneficial to maintaining the performance of the cathode and anode and can replace cathode and anode materials of different materials for experimental testing, which is beneficial to selecting suitable cathode and anode materials under different reactor parameter conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a certain embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a certain embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the reaction area in a certain embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of an electrochemical component in a certain embodiment of the utility model;

[0022] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0024] In the figure, 1-reactor; 11-inlet pipe; 12-outlet pipe; 13-slot; 14-second conductive sheet; 2-porous partition; 3-nutrient solution supply mechanism; 31-liquid storage tank; 32-circulation pump; 33-liquid outlet pipe; 331-water distributor; 34-recovery pipe; 4-waste gas collection mechanism; 41-collection cover; 42-vacuum pump; 5-reaction area; 51-gas sampling tube; 6-operation port; 61-sealed door; 7-electrochemical component; 71-cathode; 72-anode; 8-installation tube; 81-first conductive sheet; 82-end cover; 9-wire; 91-external power supply. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the invention, but it cannot be understood as a limitation on the scope of protection of the invention.

[0026] Embodiment 1:

[0027] Reference Figures 1 to 6 The utility model provides a 3D-BER trickling filter device for purifying hydrophobic organic waste gas, comprising a reactor 1, a plurality of porous partitions 2 and a nutrient solution supply mechanism 3, an air inlet pipe 11 is connected to the top of the reactor 1, an air outlet pipe 12 is connected to the bottom of the reactor 1, an exhaust gas collecting mechanism 4 is arranged at the air inlet pipe 11, a plurality of porous partitions 2 are arranged in a longitudinal array in the inner cavity of the reactor 1 and divide the reactor 1 into a plurality of layers of reaction zones 5, the nutrient solution supply mechanism 3 is respectively connected to the upper and lower ends of the reactor 1 and is used to provide nutrient solution to each reaction zone 5, microbial fillers are stacked on the porous partitions 2, each layer of the reaction zone 5 is provided with an operation port 6 and an electrochemical component 7, the electrochemical component 7 comprises a cathode 71 and an anode 72, the cathode 71 and the anode 72 are electrically connected through a wire 9 and are provided with an external power supply 91, the cathode 71 and the anode 72 are both detachably installed in the reaction zone 5, and a sealing door 61 is rotatably provided at the operation port 6.

[0028] Specifically, the anode 72 is cylindrical and can be detachably mounted at the center of the porous partition 2 , and the cathode 71 is sheet-shaped and can be detachably mounted on the inner wall of the reactor 1 .

[0029] Specifically, a mounting tube 8 for placing the anode 72 is provided on the porous partition 2, a plurality of through holes are provided on the mounting tube 8, a curved first conductive sheet 81 is provided at the bottom of the mounting tube 8, a wire 9 is connected to the first conductive sheet 81, and an end cover 82 is threadedly provided on the mounting tube 8, and the end cover 82 is used to press the anode 72 onto the first conductive sheet 81.

[0030] Specifically, the reactor 1 is provided with a slot 13 for inserting the cathode 71 , and a curved second conductive sheet 14 is provided at the slot 13 . The second conductive sheet 14 elastically abuts against the cathode 71 , and a wire 9 is connected to the second conductive sheet 14 .

[0031] Working principle: The hydrophobic organic waste gas emitted by the pollution source is collected into the reactor 1 through the waste gas collection mechanism 4 and transported from the top of the reactor 1 to the bottom of the reactor 1 and discharged through the bottom outlet pipe 12. In this process, the harmful substances in the waste gas are decomposed by biological trickling through the microbial filler and the nutrient solution supply mechanism 3 (the microorganisms decompose the VOCs in the waste gas to generate CO2 and H2O, and synthesize the biomass required for their own growth), and the current and magnetic field formed by the electrochemical component 7 increase the activity of the microorganisms to further enhance the degradation effect of the microorganisms, which has the advantages of high purification ability and high purification efficiency. The operator can sample the filler from the operation port 6 as needed, and disassemble and replace the cathode 71 and the anode 72, which is conducive to maintaining the performance of the cathode 71 and the anode 72 and can replace the cathode 71 and the anode 72 materials of different materials for experimental testing, which is conducive to selecting suitable cathode 71 and anode 72 materials under different parameter conditions of the reactor 1.

[0032] Embodiment 2:

[0033] Reference Figures 1 to 6 Combined with the technical solution of Example 1, in this embodiment, the nutrient solution supply mechanism includes a liquid storage tank 31, a circulation pump 32, a liquid outlet pipe 33 and a recovery pipe 34. The liquid outlet pipe 33 is connected and arranged at the top of the reactor 1, and the recovery pipe 34 is connected and arranged at the bottom of the reactor 1. The liquid storage tank 31 is connected with the liquid outlet pipe 33 and the recovery pipe 34 respectively, the circulation pump 32 is arranged on the liquid outlet pipe 33, and valves are arranged on the liquid outlet pipe 33 and the recovery pipe 34.

[0034] Specifically, a water distributor 331 is provided on the liquid outlet pipe 33 , and a plurality of nozzles are provided on the water distributor 331 .

[0035] The water distributor 331, the liquid storage tank 31, the circulation pump 32, the liquid outlet pipe 33 and the recovery pipe 34 cooperate with each other to provide nutrient solution to the microbial fillers at various locations by spraying nutrient solution on the top, and the waste gas is purified by biological trickling in cooperation with the microbial fillers.

[0036] Specifically, each reaction zone 5 is connected to a gas sampling pipe 51, and a valve is provided on the gas sampling pipe 51. The gas in each reaction zone 5 can be sampled as needed.

[0037] Specifically, the microbial filler contains carbon material doped with a magnetic electron mediator. The anode 72 and the cathode 71 are respectively connected to the positive and negative electrodes of the external power supply 91 through the wire 9, and coupled with the magnetic electron mediator to form a closed circuit. Under the joint action of the cathode 71, the anode 72 and the magnetic electron mediator, a micro-electrolysis reaction can occur, further promoting the decomposition of VOCs dissolved in the exhaust gas, and assisting microorganisms to accelerate the degradation of VOCs.

[0038] Specifically, the reactor 1 has a cylindrical structure.

[0039] Specifically, the exhaust gas collecting mechanism 4 includes a collecting hood 41 and an air pump 42 . The collecting hood 41 is arranged at the end of the air intake pipe 11 , and the air pump 42 is arranged on the air intake pipe 11 .

[0040] The air inlet pipe 11 , the air outlet pipe 12 , the recovery pipe 34 and the liquid outlet pipe 33 are all provided with regulating valves for flow rate regulation.

[0041] The above are only preferred embodiments of the utility model, and do not limit the utility model in any form. Any technician familiar with the field can use the above technical content to make many possible changes and modifications to the technical solution of the utility model without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the utility model without departing from the content of the technical solution of the utility model, shall fall within the protection scope of the technical solution of the utility model.

Claims

1. A 3D-BER trickling filter device for purifying hydrophobic organic waste gas, characterized in that: It includes a reactor, a plurality of porous partitions and a nutrient solution supply mechanism. The top of the reactor is connected to an air inlet pipe, the bottom of the reactor is connected to an air outlet pipe, the air inlet pipe is provided with a waste gas collection mechanism, the plurality of porous partitions are arranged in a longitudinal array in the inner cavity of the reactor and divide the reactor into a plurality of layers of reaction zones, the nutrient solution supply mechanism is respectively connected to the upper and lower ends of the reactor and is used to provide nutrient solution to each of the reaction zones, microbial fillers are stacked on the porous partitions, each layer of the reaction zone is provided with an operation port and an electrochemical component, the electrochemical component includes a cathode and an anode, the cathode and the anode are electrically connected to an external power supply through a wire, the cathode and the anode are both detachable and installed in the reaction zone, and a sealing door is rotatably provided at the operation port.

2. A 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: The anode is cylindrical and can be detachably mounted at the center of the porous partition, and the cathode is sheet-shaped and can be detachably mounted on the inner wall of the reactor.

3. A 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 2, characterized in that: A mounting tube for placing the anode is arranged on the porous partition plate, a plurality of through holes are arranged on the mounting tube, a curved first conductive sheet is arranged at the bottom of the mounting tube, a wire is connected to the first conductive sheet, an end cover is threadedly arranged on the mounting tube, and the end cover is used to press the anode onto the first conductive sheet.

4. A 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 2, characterized in that: The reactor is provided with a slot for inserting the cathode, the slot is provided with a bent second conductive sheet, the second conductive sheet elastically abuts against the cathode, and a wire is connected to the second conductive sheet.

5. The 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: The nutrient solution supply mechanism includes a liquid storage tank, a circulation pump, a liquid outlet pipe and a recovery pipe. The liquid outlet pipe is connected and arranged at the top of the reactor, and the recovery pipe is connected and arranged at the bottom of the reactor. The liquid storage tank is connected with the liquid outlet pipe and the recovery pipe respectively. The circulation pump is arranged on the liquid outlet pipe, and valves are arranged on the liquid outlet pipe and the recovery pipe.

6. A 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 5, characterized in that: The liquid outlet pipe is provided with a water distributor, and the water distributor is provided with a plurality of nozzles.

7. The 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: Each of the reaction zones is connected to a gas sampling tube, and a valve is arranged on the gas sampling tube.

8. The 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: The microbial filler contains a carbon material doped with a magnetic electron mediator.

9. The 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: The reactor is in a cylindrical structure.

10. The 3D-BER trickling filter device for purifying hydrophobic organic waste gas according to claim 1, characterized in that: The exhaust gas collecting mechanism comprises a collecting hood and an air pump. The collecting hood is arranged at the end of the air intake pipe, and the air pump is arranged on the air intake pipe.

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