CN115448524A - Electro-catalysis malodorous gas treatment device and method based on BDD anode - Google Patents
Electro-catalysis malodorous gas treatment device and method based on BDD anode Download PDFInfo
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- CN115448524A CN115448524A CN202211048703.2A CN202211048703A CN115448524A CN 115448524 A CN115448524 A CN 115448524A CN 202211048703 A CN202211048703 A CN 202211048703A CN 115448524 A CN115448524 A CN 115448524A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to an electro-catalysis malodorous gas treatment device and method based on a BDD anode, and the technical scheme is as follows: the method comprises the following steps: a conveying mechanism; the spray tower is used for spraying the circulation liquid with oxidability to generate oxidation-reduction reaction with the malodorous gas to obtain a decomposed product, and part of the decomposed product is dissolved in the circulation liquid to form a dissolved liquid; the circulating mechanism is used for storing the stock solution in advance, receiving the dissolved solution, forming an absorption solution with the stock solution, and conveying the stock solution/the absorption solution to the filter; the filter is used for filtering the stock solution/absorption solution to obtain filtrate; the electrocatalytic oxidation mechanism is used for carrying out oxidative decomposition on the filtrate to obtain a circulating liquid with oxidability; the output end of the conveying mechanism is connected with the air inlet; the input end of the circulating mechanism is connected with the liquid outlet, and the output end of the circulating mechanism is connected with the input end of the filter; the input end of the electrocatalytic oxidation mechanism is connected with the output end of the filter, and the output end of the electrocatalytic oxidation mechanism is connected with the liquid inlet; this application has the effect that improves purification deodorization efficiency, reduces the production volume of water consumption and waste liquid by a wide margin.
Description
Technical Field
The invention relates to the technical field of malodorous gas treatment, in particular to an electro-catalysis malodorous gas treatment device and method based on a BDD anode.
Background
In the industrial production, municipal sewage, sludge treatment and waste disposal processes, malodorous gases are generated, and direct discharge can cause great harm to human health, so that the malodorous gases need to be purified.
At present, the purification treatment of malodorous gas adopts a spray tower to treat the malodorous gas, the malodorous gas enters from the lower part of the spray tower, liquid enters from the upper part of the spray tower and is sprayed into fog or raindrop shape through the spray head, the malodorous gas is closely contacted with the fog or raindrop-shaped liquid to absorb easily soluble components in the malodorous gas to form a dissolved solution, but partial organic micromolecular pollutants still exist in the formed dissolved solution, so that the purification and deodorization efficiency of the spray tower is limited, and the liquid is required to be continuously provided into the spray head, thereby causing large water consumption and large waste liquid production amount.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the electro-catalysis malodorous gas treatment device and method based on the BDD anode, which have the functional advantages of greatly improving the purification and deodorization efficiency and reducing the water consumption and the waste liquid generation amount.
The technical purpose of the invention is realized by the following technical scheme:
an electrocatalytic malodorous gas treatment device based on a BDD anode, comprising:
the conveying mechanism is used for conveying the malodorous gas to the spray tower;
the spray tower is provided with an air inlet, an air outlet, a liquid inlet and a liquid outlet and is used for spraying circulation liquid with oxidability to enable the circulation liquid and the malodorous gas to generate oxidation-reduction reaction to obtain decomposed substances, and part of the decomposed substances are dissolved in the circulation liquid to form solution;
the circulating mechanism is used for storing stock solution in advance, receiving the dissolved solution, forming absorption liquid with the stock solution, and conveying the stock solution/absorption liquid to the filter;
the filter is used for filtering the stock solution/absorption solution to obtain filtrate;
the electrocatalytic oxidation mechanism is used for carrying out oxidative decomposition on the filtrate to obtain a circulating liquid with oxidability and conveying the circulating liquid to the spray tower;
the output end of the conveying mechanism is connected with the air inlet; the input end of the circulating mechanism is connected with the liquid outlet, and the output end of the circulating mechanism is connected with the input end of the filter; the input end of the electrocatalytic oxidation mechanism is connected with the output end of the filter, and the output end of the electrocatalytic oxidation mechanism is connected with the liquid inlet.
Optionally, the spray tower comprises: the tower body, the demister and a spray header for spraying the circulating liquid; the air inlet, the air outlet, the liquid inlet and the liquid outlet are all arranged on the tower body; the demister and the spray header are both arranged in the tower body; the input end of the spray header is connected with the liquid inlet.
Optionally, the circulation mechanism includes: the circulating water tank is used for storing stock solution in advance, receiving the dissolved solution and then forming absorption liquid with the stock solution; and a circulating water pump for feeding the stock solution/absorption solution to a filter; the input end of the circulating water tank is connected with the liquid outlet, and the output end of the circulating water tank is connected with the input end of the circulating water pump; the output end of the circulating water pump is connected with the input end of the filter; and a water replenishing port is arranged on the circulating water tank.
Optionally, the conveying mechanism includes: the air quantity regulating valve, the blower and the air supply pipeline; the input end of the air feeder is connected with the air volume regulating valve, and the output end of the air feeder is connected with the input end of the air supply pipeline; and the output end of the air supply pipeline is connected with an air inlet.
Optionally, the air supply pipeline is connected with a sampling pipeline before treatment; a first valve is arranged on the sampling pipeline before treatment; the air outlet is connected with an air outlet pipeline; the air outlet pipeline is connected with a processed sampling pipeline; and a second valve is arranged on the processed sampling pipeline.
Optionally, the method further includes: the control box is used for controlling the conveying mechanism, the spray tower, the circulating mechanism, the filter and the electrocatalytic oxidation mechanism; the conveying mechanism, the spray tower, the circulating mechanism, the filter and the electrocatalytic oxidation mechanism are all electrically connected with the control box.
Optionally, the method further includes: connecting a pipeline; the input end of the filter is connected with the input end of the electrocatalytic oxidation mechanism through a connecting pipeline; the connecting pipeline is provided with a pressure sensor, a temperature sensor, a flowmeter and a conductivity sensor; and the pressure sensor, the temperature sensor, the flowmeter and the conductivity sensor are all electrically connected with the control box.
Optionally, the method further includes: a pressure transmitter; one end of the pressure transmitter is connected with the air inlet, and the other end of the pressure transmitter is connected with the air outlet; and the pressure transmitter is connected with the control box.
Optionally, the electrocatalytic oxidation mechanism comprises: a housing, a BDD anode sheet and a cathode sheet; the BDD anode strip and the cathode strip are both arranged in the shell.
An electrocatalytic malodorous gas treatment method based on a BDD anode uses the electrocatalytic malodorous gas treatment device and comprises the following steps:
(1) The circulating mechanism is internally pre-stored with stock solution, the stock solution is conveyed to the filter to filter the stock solution to obtain filtered solution, the electrocatalytic oxidation mechanism is used for carrying out oxidative decomposition on the filtered solution to obtain circulating solution with oxidizability, and the circulating solution is conveyed to the spray tower from the liquid inlet;
(2) The conveying mechanism conveys the malodorous gas to the spray tower from the air inlet, the spray tower sprays circulating liquid with oxidability, the circulating liquid and the malodorous gas generate oxidation-reduction reaction to obtain decomposed substances, part of the decomposed substances are dissolved in the circulating liquid to form dissolved liquid and flow back to the circulating mechanism from the liquid outlet, and the other part of the decomposed substances are discharged from the air outlet;
(3) The circulating mechanism receives the dissolved liquid, the dissolved liquid and the stock solution form absorption liquid, the absorption liquid is conveyed to the filter to be filtered to obtain filtrate, the electrocatalytic oxidation mechanism conducts oxidative decomposition on the filtrate to obtain circulation liquid with oxidizability, and the circulation liquid is conveyed to the spray tower from the liquid inlet to realize circulating spraying.
In conclusion, the invention has the following beneficial effects: through circulation mechanism, the setting of filter and electrocatalytic oxidation mechanism, circulation mechanism can carry the absorption liquid that solution and stoste mix the formation in proper order for filter and electrocatalytic oxidation mechanism in order to form the circulation liquid that has the oxidability, the circulation that the spray column sprayed foul gas has been realized, thereby the water consumption has been reduced, the yield of waste liquid has been reduced, adopt the combination of doping boron diamond electrode and spray column, can improve purification deodorization efficiency by a wide margin, reduce water consumption and power consumption, reduce the yield of waste liquid.
Drawings
Fig. 1 is a schematic structural diagram of an electrocatalytic malodorous gas treatment device based on a BDD anode provided by the invention.
In the figure: 1. a conveying mechanism; 11. an air volume adjusting valve; 12. a blower; 13. an air supply duct; 14. a pre-treatment sampling pipeline; 141. a first valve; 2. a spray tower; 21. a tower body; 22. a demister; 23. a shower head; 24. an air inlet; 25. an air outlet; 26. a liquid inlet; 27. a liquid outlet; 28. an air outlet pipeline; 29. sampling the pipeline after treatment; 291. a second valve; 3. a circulating mechanism; 31. a circulating water tank; 311. a water replenishing port; 32. a water circulating pump; 4. a filter; 5. an electrocatalytic oxidation mechanism; 6. a control box; 61. a display screen; 7. connecting a pipeline; 71. a pressure sensor; 72. a temperature sensor; 73. a flow meter; 74. a conductivity sensor; 8. a pressure transmitter.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The invention is described in detail below with reference to the figures and examples.
The invention provides an electrocatalytic malodorous gas treatment device based on a BDD anode, which comprises the following components as shown in figure 1:
the conveying mechanism 1 is used for conveying the malodorous gas to the spray tower 2;
the spray tower 2 is provided with an air inlet 24, an air outlet 25, a liquid inlet 26 and a liquid outlet 27 and is used for spraying circulation liquid with oxidability to enable the circulation liquid and the malodorous gas to generate oxidation-reduction reaction to obtain decomposed products, and part of the decomposed products are dissolved in the circulation liquid to form solution;
the circulating mechanism 3 is used for storing stock solution in advance, receiving the dissolved solution, forming absorption liquid with the stock solution, and conveying the stock solution/absorption liquid to the filter 4; the stock solution can be water;
the filter 4 is used for filtering the stock solution/absorption solution to obtain filtrate;
the electrocatalytic oxidation mechanism 5 is used for carrying out oxidative decomposition on the filtrate to obtain a circulating liquid with oxidability and conveying the circulating liquid to the spray tower 2;
the output end of the conveying mechanism 1 is connected with an air inlet 24; the input end of the circulating mechanism 3 is connected with the liquid outlet 27, and the output end of the circulating mechanism is connected with the input end of the filter 4; the input end of the electrocatalytic oxidation mechanism 5 is connected with the output end of the filter 4, and the output end is connected with the liquid inlet 26.
In practical application, through the arrangement of the circulating mechanism 3, the filter 4 and the electrocatalytic oxidation mechanism 5, the circulating mechanism 3 can sequentially convey absorption liquid formed by mixing the dissolving liquid and the stock solution to the filter 4 and the electrocatalytic oxidation mechanism 5 to form circulating liquid with oxidability, so that the circulating spraying of the malodorous gas by the spraying tower 2 is realized, the water consumption is reduced, and the generation amount of waste liquid is reduced; the electrocatalytic oxidation mechanism 5 is combined with the spray tower 2, so that the purification and deodorization efficiency is greatly improved.
Further, the spray tower 2 includes: the tower body 21, the demister 22 and a spray header 23 for spraying the circulating liquid; the air inlet 24, the air outlet 25, the liquid inlet 26 and the liquid outlet 27 are all arranged on the tower body 21; the demister 22 and the spray header 23 are both arranged in the tower body 21; the input end of the spray header 23 is connected with the liquid inlet 26.
In practical application, the air inlet 24 is arranged at the lower end of the side wall of the tower body 21, the air outlet 25 is arranged at the top end of the tower body 21, the liquid inlet 26 is arranged at the upper end of the side wall of the tower body 21, and the liquid outlet 27 is arranged at the bottom end of the tower body 21; the tower body 21 is also provided with a packing layer, the packing of the packing layer can adopt one or more of pall rings, raschig rings and hollow polyhedral balls, a demister 22, a spray head 23 and the packing layer are sequentially arranged from top to bottom, an air inlet 24 is positioned below the packing layer, malodorous gas input from the air inlet 24 passes through the packing layer at the speed of 0.5-1.5m/s, then fully reacts with circulating liquid with strong oxidizing property sprayed by the spray head 23, part of the malodorous gas is decomposed into carbon dioxide and water, and the other part of the malodorous gas is decomposed into other micromolecular organic matters, wherein the other micromolecular organic matters are dissolved in the circulating liquid to form dissolved liquid and flow back to the circulating mechanism 3 from a liquid outlet 27, the carbon dioxide and the water form smoke containing fog drops, and the fog drops in the smoke can be collided on blades of the demister 22 to be trapped through the arrangement of the demister 22, the fog drops can be collected to form water flow so as to flow back to the circulating mechanism 3, the separation is realized, and the smoke flowing through the demister 22 can be discharged after meeting the requirements.
Further, the circulation mechanism 3 includes: a circulating water tank 31 for storing the stock solution in advance, receiving the solution and forming an absorption liquid with the stock solution; and a circulating water pump 32 for feeding the stock solution/absorption solution to the filter 4; the input end of the circulating water tank 31 is connected with the liquid outlet 27, and the output end of the circulating water tank is connected with the input end of the circulating water pump 32; the output end of the circulating water pump 32 is connected with the input end of the filter 4; the circulating water tank 31 is provided with a water replenishing port 311.
In practical application, the raw liquid (such as water) is conveyed into the circulating water tank 31 through the water replenishing port 311, a water drainage pipeline is connected to the circulating water tank 31, a water valve for controlling the opening and closing of the water drainage pipeline is arranged on the water drainage pipeline, and after circulation is finished, the water valve can be opened to drain the absorption liquid in the circulating water tank 31 through the water drainage pipeline.
Further, the conveying mechanism 1 includes: an air volume adjusting valve 11, a blower 12 and an air supply pipeline 13; the input end of the blower 12 is connected with the air volume regulating valve 11, and the output end is connected with the input end of the air supply pipeline 13; the output end of the air supply pipeline 13 is connected with an air inlet 24.
In practical application, the blower 12 sequentially conveys malodorous gas with an odor concentration of 500-5000 (dimensionless) to the tower body 21 from the air supply pipeline 13 and the air inlet 24, and the air volume of the malodorous gas entering the blower 12 can be adjusted through the arrangement of the air volume adjusting valve 11, so that the malodorous gas sent into the tower body 21 by the blower 12 is matched with the amount of circulating liquid sprayed by the spray header 23.
Further, a sampling pipeline 14 before treatment is connected to the air supply pipeline 13; a first valve 141 is arranged on the sampling pipeline 14 before treatment; the air outlet 25 is connected with an air outlet pipeline 28; the air outlet pipeline 28 is connected with a processed sampling pipeline 29; a second valve 291 is provided on the post-treatment sampling line 29.
Specifically, the first valve 141 and the second valve 291 may be gate valves, ball valves, butterfly valves, or the like; the sampling pipeline 14 before treatment is communicated with the air supply pipeline 13, and the sampling pipeline 29 after treatment is communicated with the air outlet pipeline 28; can follow sampling pipe 14 after opening first valve 141 and gather the foul gas before the processing, close first valve 141 after finishing gathering, can gather the foul gas after the processing (that is to say the flue gas) from sampling pipe 29 after the processing after opening second valve 291, close second valve 291 after finishing gathering, be convenient for detect the foul gas before the processing and the foul gas after the processing to judge the treatment effect to the foul gas.
Further, still include: a control box 6 for controlling the conveying mechanism 1, the spray tower 2, the circulating mechanism 3, the filter 4 and the electrocatalytic oxidation mechanism 5; the conveying mechanism 1, the spray tower 2, the circulating mechanism 3, the filter 4 and the electrocatalytic oxidation mechanism 5 are all electrically connected with a control box 6.
Specifically, a controller is arranged in the control box 6, the controller can adopt a single chip microcomputer, the controller is respectively electrically connected with the air feeder 12, the demister 22, the circulating water pump 32, the filter 4 and the electrocatalytic oxidation mechanism 5, and a plurality of buttons are arranged on the control box 6 and used for controlling a power supply, turning on and off, emergency stop and the like.
Further, still include: a connecting pipe 7; the input end of the filter 4 is connected with the input end of the electrocatalytic oxidation mechanism 5 through a connecting pipeline 7; the connecting pipeline 7 is provided with a pressure sensor 71, a temperature sensor 72, a flow meter 73 and a conductivity sensor 74; the pressure sensor 71, the temperature sensor 72, the flow meter 73 and the conductivity sensor 74 are electrically connected to the control box 6.
Specifically, the pressure sensor 71, the temperature sensor 72, the flow meter 73 and the conductivity sensor 74 are all electrically connected to the controller, the pressure sensor 71 is used for detecting a pressure value of the filtrate, the temperature sensor 72 is used for detecting a temperature value of a working environment, the flow meter 73 is used for detecting a flow rate value of the filtrate, the conductivity sensor 74 is used for detecting a conductivity value of the filtrate, the control box 6 is further provided with a display for displaying a value detected by the pressure sensor 71, a value detected by the humidity sensor, a value detected by the flow meter 73 and a value detected by the conductivity sensor 74, and the controller is electrically connected to the display.
Further, still include: a pressure transmitter 8; one end of the pressure transmitter 8 is connected with the air inlet 24, and the other end of the pressure transmitter is connected with the air outlet 25; the pressure transmitter 8 is connected with the control box 6.
Specifically, pressure transmitter 8 is connected with the controller electricity, and pressure transmitter 8 preferentially adopts diaphragm pressure transmitter, and pressure transmitter 8 can measure the pressure difference of tower body 21 air intake 24 department and tower body 21 air outlet 25 department to show on display screen 61, the staff of being convenient for knows the atmospheric pressure condition in the tower body 21, in time adjusts when having unusually and corrects.
Further, the electrocatalytic oxidation mechanism 5 includes: a shell, a BDD (boron-doped diamond) anode sheet and a cathode sheet; the cathode sheet can be a hydrogen peroxide gas diffusion cathode sheet or a titanium cathode sheet; the shell is provided with two through holes; the two through holes are respectively the input end and the output end of the electrocatalytic oxidation mechanism 5; the BDD anode sheet and the BDD cathode sheet are both arranged in the shell; a 3-5cm interval is reserved between the BDD anode sheet and the BDD cathode sheet; the BDD anode sheet and the BDD cathode sheet are electrically connected with a controller, the working current of the electrocatalytic oxidation mechanism is 15-120A, and the working voltage is 10-60V; through the setting of BDD anode strip for this electrocatalytic oxidation mechanism can high-efficiently produce the hydroxyl free radical for the electrocatalytic oxidation mechanism based on BDD anode strip behind the filtrate through the electrocatalytic oxidation mechanism based on BDD anode strip, also can produce the circulating liquid that has strong oxidizing property promptly, BDD anode strip and cathode strip have Z type carrier transmission mechanism, and the power consumption is still less, and the carrier transmission is changeed and is taken place, can improve deodorization treatment efficiency, reduces the energy consumption.
Specifically, the first valve 141 and the blower 12, the circulating water tank 31 and the circulating water pump 32, the circulating water pump 32 and the filter 4, the electrocatalytic oxidation mechanism 5 and the liquid inlet 26, the liquid inlet 26 and the spray header 23, and the pressure transmitter 8 and the air inlet 24 and the air outlet 25 are connected by pipelines.
According to the electrocatalysis malodorous gas treatment device, through the arrangement of the circulating mechanism 3, the filter 4 and the electrocatalysis oxidation mechanism 5, the circulating mechanism 3 can sequentially convey absorption liquid formed by mixing dissolving liquid and stock solution to the filter 4 and the electrocatalysis oxidation mechanism 5 to form circulation liquid with oxidability, so that the cyclic spraying of malodorous gas by the spray tower 2 is realized, the water consumption is reduced, the generation amount of waste liquid is reduced, and by adopting the combination of the boron-doped diamond electrode and the spray tower 2, the purification and deodorization efficiency can be greatly improved, the water consumption and the power consumption are reduced, and the generation amount of waste liquid is reduced.
The invention also provides an electrocatalysis malodorous gas treatment method, which uses the electrocatalysis malodorous gas treatment device and comprises the following steps:
(1) The circulating mechanism 3 is internally pre-stored with stock solution, the stock solution is conveyed to the filter 4 to be filtered to obtain filtered solution, the electrocatalytic oxidation mechanism 5 is used for carrying out oxidative decomposition on the filtered solution to obtain circulating solution with oxidizability, and the circulating solution is conveyed to the spray tower 2 from the liquid inlet 26;
(2) The conveying mechanism 1 conveys malodorous gas with the odor concentration of 500-5000 (dimensionless) to the spray tower 2 from the air inlet 24, namely the air blower 12 conveys the malodorous gas to the spray tower 2, the spray tower 2 sprays circulation liquid with oxidability, namely the spray tower 2 sprays circulation liquid with oxidability, the circulation liquid and the malodorous gas generate oxidation-reduction reaction to obtain a decomposition product, part of the decomposition product is dissolved in the circulation liquid to form solution and flows back to the circulation mechanism 3 from the liquid outlet 27, namely flows back to the circulation water tank 31, and the other part of the decomposition product is discharged from the air outlet 25;
(3) The circulation mechanism 3 receives the solution, the solution and the stock solution form an absorption solution, the absorption solution is conveyed to the filter 4 to filter the absorption solution to obtain a filtrate, namely, the circulation water tank 31 receives the solution, the circulation water pump 32 conveys the absorption solution to the filter 4, the electrocatalytic oxidation mechanism 5 conducts oxidative decomposition on the filtrate to obtain a circulation solution with oxidability, and the circulation solution is conveyed to the spray tower 2 from the liquid inlet 26 to realize circulation spraying.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. An electrocatalytic malodorous gas treatment device based on a BDD anode, comprising:
the conveying mechanism is used for conveying the malodorous gas to the spray tower;
the spray tower is provided with an air inlet, an air outlet, a liquid inlet and a liquid outlet and is used for spraying circulation liquid with oxidability to enable the circulation liquid and the malodorous gas to generate oxidation-reduction reaction to obtain decomposed substances, and part of the decomposed substances are dissolved in the circulation liquid to form solution;
the circulating mechanism is used for storing stock solution in advance, receiving the dissolved solution, forming absorption liquid with the stock solution, and conveying the stock solution/absorption liquid to the filter;
the filter is used for filtering the stock solution/absorption solution to obtain filtrate;
the electrocatalytic oxidation mechanism is used for carrying out oxidative decomposition on the filtrate to obtain a circulating liquid with oxidability and conveying the circulating liquid to the spray tower;
the output end of the conveying mechanism is connected with the air inlet; the input end of the circulating mechanism is connected with the liquid outlet, and the output end of the circulating mechanism is connected with the input end of the filter; the input end of the electrocatalytic oxidation mechanism is connected with the output end of the filter, and the output end of the electrocatalytic oxidation mechanism is connected with the liquid inlet.
2. The BDD anode-based electrocatalytic malodorous gas treatment device of claim 1, wherein the spray tower comprises: the tower body, the demister and a spray header for spraying the circulating liquid; the air inlet, the air outlet, the liquid inlet and the liquid outlet are all arranged on the tower body; the demister and the spray header are both arranged in the tower body; the input end of the spray header is connected with the liquid inlet.
3. The BDD anode-based electrocatalytic malodorous gas treatment device of claim 1, wherein the circulation mechanism comprises: the circulating water tank is used for storing stock solution in advance, receiving the dissolved solution and then forming absorption liquid with the stock solution; and a circulating water pump for feeding the stock solution/absorption solution to a filter; the input end of the circulating water tank is connected with the liquid outlet, and the output end of the circulating water tank is connected with the input end of the circulating water pump; the output end of the circulating water pump is connected with the input end of the filter; and a water replenishing port is arranged on the circulating water tank.
4. The BDD anode-based electrocatalytic malodorous gas treatment device of claim 1, wherein the transport mechanism comprises: the air volume adjusting valve, the air feeder and the air supply pipeline; the input end of the air feeder is connected with the air volume regulating valve, and the output end of the air feeder is connected with the input end of the air supply pipeline; and the output end of the air supply pipeline is connected with an air inlet.
5. The BDD anode-based electro-catalytic malodorous gas treatment device according to claim 4, wherein the air supply pipeline is connected with a pre-treatment sampling pipeline; a first valve is arranged on the sampling pipeline before treatment; the air outlet is connected with an air outlet pipeline; the air outlet pipeline is connected with a processed sampling pipeline; and a second valve is arranged on the processed sampling pipeline.
6. The BDD anode-based electrocatalytic malodorous gas treatment device of claim 1, further comprising: the control box is used for controlling the conveying mechanism, the spray tower, the circulating mechanism, the filter and the electrocatalytic oxidation mechanism; the conveying mechanism, the spray tower, the circulating mechanism, the filter and the electrocatalytic oxidation mechanism are all electrically connected with the control box.
7. The BDD anode based electrocatalytic malodorous gas treatment device of claim 6, further comprising: connecting a pipeline; the input end of the filter is connected with the input end of the electrocatalytic oxidation mechanism through a connecting pipeline; the connecting pipeline is provided with a pressure sensor, a temperature sensor, a flowmeter and a conductivity sensor; and the pressure sensor, the temperature sensor, the flowmeter and the conductivity sensor are all electrically connected with the control box.
8. The BDD anode based electrocatalytic malodorous gas treatment device of claim 6, further comprising: a pressure transmitter; one end of the pressure transmitter is connected with the air inlet, and the other end of the pressure transmitter is connected with the air outlet; and the pressure transmitter is connected with the control box.
9. A BDD anode based electrocatalytic malodorous gas treatment device as claimed in any one of claims 1 to 8 wherein said electrocatalytic oxidation mechanism comprises: a housing, a BDD anode sheet and a cathode sheet; the BDD anode strip and the cathode strip are both arranged in the shell.
10. A BDD anode-based electrocatalytic malodorous gas treatment method using the BDD anode-based electrocatalytic malodorous gas treatment device as described in any one of claims 1 to 9, comprising the steps of:
(1) The circulating mechanism is internally pre-stored with stock solution, the stock solution is conveyed to the filter to filter the stock solution to obtain filtered solution, the electrocatalytic oxidation mechanism is used for carrying out oxidative decomposition on the filtered solution to obtain circulating solution with oxidizability, and the circulating solution is conveyed to the spray tower from the liquid inlet;
(2) The conveying mechanism conveys the malodorous gas to the spray tower from the air inlet, the spray tower sprays circulating liquid with oxidability, the circulating liquid and the malodorous gas generate oxidation-reduction reaction to obtain decomposed substances, part of the decomposed substances are dissolved in the circulating liquid to form dissolved liquid and flow back to the circulating mechanism from the liquid outlet, and the other part of the decomposed substances are discharged from the air outlet;
(3) The circulating mechanism receives the dissolved liquid, the dissolved liquid and the stock solution form absorption liquid, the absorption liquid is conveyed to the filter to be filtered to obtain filtrate, the electrocatalytic oxidation mechanism conducts oxidative decomposition on the filtrate to obtain circulation liquid with oxidizability, and the circulation liquid is conveyed to the spray tower from the liquid inlet to realize circulating spraying.
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Citations (7)
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