CN108786433A - A kind of exhaust gas dust, waste liquid, exhaust gas coprocessing device and method - Google Patents

Abstract

The invention discloses a co-processing device and method for flue gas dust, waste liquid and waste gas. The co-processing device includes one or more adsorption electrochemical treatment units (1), microbial electrochemical leaching units (2) and metal Recovery unit (3); when there are multiple adsorption electrochemical treatment units, the connection mode of the multiple adsorption electrochemical treatment units is series or parallel connection; the connection between one or more adsorption electrochemical treatment units and the microbial electrochemical leaching unit The way is series or parallel. Adapt to the change of processing capacity and concentration through series-parallel connection, small footprint, simple process, easy to operate, and conform to the development trend of energy saving and emission reduction.

Description

Device and method for co-processing flue gas dust, waste liquid and waste gas

technical field

The invention belongs to the technical field of co-processing and utilization of flue gas dust, waste liquid and waste gas, and relates to a device and method for co-processing flue gas dust, waste liquid and waste gas. The waste liquid and waste gas are degraded while metals are enriched and recovered.

Background technique

A large amount of waste liquid, solid particle dust pollutants, gaseous pollutants, etc. are produced in the process of industrial and agricultural production. Such as: alcohols, hydrocarbon waste liquid produced by coal chemical industry and toxic waste gas from gasification; metallurgical industry such as nickel-molybdenum sulfide ore, antimony sulfide ore, lead sulfide concentrate smelting process produces metallurgical wastewater, dust and smelting flue gas ; Waste liquid and sewage gas produced by livestock and poultry manure in agricultural farms, volatile and irritating waste liquid and gas produced by fertilizer fermentation; high-rise buildings, office buildings, office appliances, computers, printers, copiers, etc., as well as cleaning agents and insecticides waste liquid and harmful gas. These flue gases and waste gases mainly include various hydrocarbons, alcohols, aldehydes, acids, ketones and amines, etc., as well as sulfur oxides, nitrogen oxides, carbon oxides, halogens and their compounds, and volatile metal arsenic, lead etc. Volatile waste gas can threaten people's physical and mental health to a large extent after being absorbed by the human body, and also have a great impact on the living environment and the growth of animals and plants. The waste liquid contains different concentrations of organic and inorganic substances, and metal ions such as Cr ⁶⁺ , Zn ²⁺ , Cu ²⁺ , Fe ²⁺ , and Ni ²⁺ .

Waste gas and waste liquid are generally treated separately. The methods include rectification, extraction, biological method, chemical oxidation method, etc. These methods have problems such as large investment and difficult operation and management. "Coal-based olefin project waste liquid and waste gas treatment technology and application" adopts boiler co-firing technology treatment device to treat hydrocarbon waste liquid and alcohol waste liquid, and release gas from gasification device, burning at 1100 ° C, the main components of flue gas after combustion There are nitrogen, oxygen, carbon dioxide, water, sulfur dioxide, carbon monoxide, nitrogen dioxide, hydrogen chloride and so on. The energy consumption is high, the cost is high, and the exhaust gas still needs to be treated. The patent "High Concentration Chemical Waste Gas and Waste Liquid Treatment System" (CN206103632U) discloses a high-concentration chemical waste gas and waste liquid treatment system, but the treatment system only processes waste liquid through micro-electrolysis, and the micro-electrolysis still needs to be replaced. materials, and electrolysis produces toxic and harmful gases. This treatment system is equipped with a condensation device, and the material is titanium tubes, and the process cost is high. The patent "A Gas Purification Device" (publication number CN107149855A) discloses a gas purification device using activated carbon and diatomaceous earth as adsorbents. The device is provided with an alarm system for timely replacement of activated carbon and diatomite. Although the harmful gas can be effectively removed, the adsorbent needs to be replaced continuously, and the regeneration of the adsorbent is still a key issue in the subsequent treatment. The patent "Industrial Wastewater Treatment System" (CN107089751A) discloses an industrial wastewater treatment system. This patent mainly uses pressure filtration and osmosis to treat wastewater. When the TDS concentration of wastewater is too high, a high-temperature furnace is used to carry out waste heat solid-liquid dry distillation , not only consumes energy, but also has an unsatisfactory treatment effect for wastewater with complex composition.

Contents of the invention

The object of the present invention is to provide a device and method for co-processing flue gas dust, waste liquid and waste gas. The device has a simple structure and can utilize Electrochemical technology and microbial electrochemical system regenerate and recycle the carrier, guide the electrons in the redox reaction, accelerate the reaction rate, and co-process the flue gas dust, waste liquid, and waste gas to meet the emission standards.

In order to achieve the above object, the present invention has adopted following technical scheme:

A co-processing device for flue gas dust, waste liquid and waste gas, the co-processing device includes one or more adsorption electrochemical treatment units 1, microbial electrochemical leaching units 2 and metal recovery units 3;

When there are multiple adsorption electrochemical treatment units, the connection mode of the multiple adsorption electrochemical treatment units is series or parallel; the connection mode of one or more adsorption electrochemical treatment units and the microbial electrochemical leaching unit is series or parallel connection;

The metal recovery unit 3 includes a lotion spraying part and a lotion collecting part;

The adsorption electrochemical treatment unit 1 comprises a box body 1-1, the center of the box body 1-1 is filled with a carrier II 1-7, and the space between the carrier II1-7 and the box body wall of the box body 1-1 is filled with a carrier I 1-6, and a small space is left between the carrier I 1-6 and the left side wall of the box body 1-1 to form an air intake buffer chamber 1-2, and on the right side of the carrier I 1-6 and the box body 1-1 Leave a small space between the side walls to form an air outlet buffer chamber 1-4; the air inlet buffer chamber 1-2 is provided with an air inlet 1-3, and the air outlet buffer chamber 1-4 is provided with an air outlet 1-5;

A number of small holes are evenly arranged on the top wall of the box body 1-1, and a lotion spraying part is arranged on the upper part of the top wall;

A number of small holes are evenly arranged on the bottom wall of the box body 1-1, and a lotion collecting part is arranged on the bottom wall;

The microbial electrochemical leaching unit 2 includes an N-level microbial electrochemical leaching subunit 2-1, and the upper part of the first-level microbial electrochemical leaching subunit in the N-level microbial electrochemical leaching subunit 2-1 is set into Trachea 2-2, the upper part of the last stage microbial electrochemical leaching subunit is provided with an exhaust pipe 2-3, and the lower part is provided with a drain pipe 2-4; the N-level microbial electrochemical leaching subunit 2-1 is connected to the The bacterial liquid waste liquid mixing tank 2-5 is connected, and the leachate formed at the bottom of the N-level microbial electrochemical leaching subunit 2-1 can return to the N-level microbial electrochemical leaching subunit 2-1 through the circulation pipeline 2-6 Continue to carry out leaching treatment at the top;

In the microbial electrochemical leaching subunit 2-1, carriers I 1-6 and carriers III 2-7 are arranged in a staggered manner.

Further, the lotion spraying part includes a spray cover 3-1 and a lotion spray head 3-2, the spray cover 3-1 is buckled on the top wall of the box body 1-1, and the lotion spray head 3 -2 is set on the spray cover, used to spray the lotion in the small hole on the top wall of the box;

The lotion collection part includes a lotion collection cover 3-3, a deflector 3-4 and a lotion storage 3-5, and the lotion collection cover is buckled on the bottom wall of the box body 1-1 for collecting The washing liquid flows out from the small hole on the bottom wall; the deflector is arranged obliquely in the washing liquid collecting cover; the washing liquid collecting cover communicates with the washing liquid storage through a pipeline.

Preferably, the included angle between the deflector and the bottom wall of the box body 1-1 is 2-10°.

Preferably, the diameter of the small hole is 1-10mm.

Preferably, a spray head is arranged on the top of the microbial electrochemical leaching sub-unit 2-1 for spraying the waste liquid on the carrier I and the carrier III.

Preferably, the carrier I is a gas-permeable conductive material, the carrier I is embedded with conductive titanium wires, and is connected to an external electric field; the carrier II is a loose and porous conductive material; the carrier III is an adsorption material with a large specific surface area and a well-developed microporous structure .

Preferably, the inner walls of the adsorption electrochemical treatment unit 1 and the microbial electrochemical leaching unit 2 are coated with corrosion-resistant materials.

The device of the present invention consists of three parts, including one or more adsorption electrochemical treatment units, microbial electrochemical leaching units and metal recovery units for collecting metal washing liquid. Each unit can be connected in series or in parallel to adapt to the changes in the amount and concentration of flue gas dust, waste liquid and waste gas.

One or more adsorption electrochemical treatment units of the present invention can process metal flue gas, dust and waste gas, and realize metal recovery, dust interception and carrier regeneration. The microbial electrochemical leaching unit of the present invention includes a multi-stage microbial electrochemical leaching subunit, a liquid spray device and a liquid circulation device, and each microbial electrochemical leaching subunit is composed of multiple sets of carrier I, carrier III, and additional circuits . The multi-stage microbial electrochemical leaching sub-units are connected through pipelines and work in series or parallel to adapt to the changes in the volume and concentration of the treated waste liquid, waste gas and metal fume. The mixed liquid and the adsorption electrochemical treatment unit discharge waste gas continuously. The processing effect is enhanced through multiple processing units.

The adsorption electrochemical treatment unit of the present invention includes a box body provided with an air inlet and an air outlet, and the box body also includes an air inlet buffer chamber, an air outlet buffer chamber, carrier I, carrier II and an external electric field, which can treat metal fume , dust and exhaust gas, to achieve metal recovery, dust interception and carrier regeneration.

The inlet buffer chamber and the outlet buffer chamber are composed of the carrier I and the box, which are respectively used for the uniform distribution of metal fume and exhaust gas, entering the carrier II through the carrier I, and uniformly collecting the exhaust gas.

In the present invention, the carrier I is a breathable conductive material, which has the function of absorbing waste gas and volatile metals; the carrier II is a loose and porous conductive material, and its huge surface area and rich pore structure can effectively absorb waste gas and volatile metals. Conductive titanium wires are embedded on the carrier I and connected with the external electric field. When the whole device is applied with an electric field, the waste gas and volatile metals are adsorbed through the carrier I, and the organic macromolecular waste gas adsorbed on the carrier I is electrolyzed into small molecular gases. Unadsorbed waste gas, electrolyzed small molecular gas and volatile metals enter carrier II, and while the three are adsorbed, the former two are electrolyzed into small molecular gas or smaller molecular gas. As the gas and volatile metals advance in the carrier II, the above process continues to circulate, so that the exhaust gas is adsorbed. The electrolysis and adsorption processes in carrier I and carrier II are carried out synchronously, that is, in the cycle of adsorption and desorption, the degradation of organic macromolecular gas is completed while the carrier I and carrier II are regenerated. The exhaust gas that has not been adsorbed and degraded enters the microbial electrochemical treatment unit along with the pipeline, and is further degraded under the action of microorganisms, carrier I and carrier III, and an external electric field.

In the present invention, the lotion enters the box body through the small hole through the lotion nozzle, and the lotion is nitric acid or acetic acid or sodium hydroxide solution.

In the present invention, the deflector is arranged obliquely in the deflector, and the inclination angle is 2-10°. Specifically, one end can be tilted, and the other end is connected to the outlet of the lotion collection cover, and the collected lotion enters the washing machine through the outlet. liquid storage.

In the present invention, the aperture of the small hole on the bottom wall of the box body is 1-10 mm; the carrier I larger than the aperture is placed on the upper part to prevent the carrier II from flowing away with the liquid.

Furthermore, the interior of the above-mentioned devices is coated with a corrosion-resistant material coating.

In the actual application of the adsorption electrochemical treatment unit, the number and assembly method of the unit can be flexibly adjusted according to the concentration of the waste gas and metal fume to be treated and the amount of intake air. Multiple units are connected in series, in parallel or series-parallel to achieve the purpose of efficiently treating waste gas and retaining and recycling metals.

The microbial electrochemical leaching unit includes a plurality of microbial electrochemical leaching subunits separated by partitions, and the leaching subunits are connected by pipelines, and the number of cycles can be flexibly adjusted according to the on-site water quality in practical applications. The microbial electrochemical leaching unit is connected with an air intake pipe for transporting the gas treated with heavy metal fume to the leaching chamber, and the top of the leaching unit is connected with a pipeline for conveying bacteria liquid-waste liquid mixture, and the leaching unit The bottom end is connected with a bacteria liquid-waste liquid mixed liquid circulation pipe, and the right side of the leaching unit is provided with a bacterial liquid-waste liquid mixed liquid discharge pipe, which communicates with the microbial electrochemical leaching sub-unit through pipes to detect water quality.

The microbial electrochemical leaching sub-unit mainly includes carrier I and carrier III. The carrier I and carrier III are arranged in a staggered manner, which prolongs the running channel of the exhaust gas in the device and increases the residence time of the exhaust gas in the device. , to strengthen the processing effect. Part of the waste gas discharged from the adsorption electrochemical treatment unit is adsorbed by the carrier III and degraded by microorganisms. The waste gas not absorbed by the carrier III and the waste gas generated by the microbial electrochemical leaching unit to treat the waste liquid are in the process of running between the carrier I and the carrier III. Degraded by microorganisms in the leachate, or adsorbed and degraded by carrier I and carrier III.

Furthermore, the above-mentioned carrier I is a green and environment-friendly inert electrode material, which has a large specific surface area, good electrical conductivity, and long service life, and can provide a large number of adsorption sites required for microbial adsorption. The two ends of the carrier I are connected with an external electric field, and the waste gas and liquid adsorbed by the carrier I are electrolytically degraded into small molecular gases or CO ₂ and H ₂ O. The degraded carrier I has the adsorption capacity, achieving the purpose of degrading while adsorbing. The above carrier III has small and uniform micropores, simple structure, high adsorption speed and easy desorption.

Further, the microbial electrochemical leaching device includes a bacterial liquid waste liquid mixing tank, and a pump body for transporting the mixed liquid to the leaching unit is provided between the bacterial liquid waste liquid mixing tank and the top of the leaching sub-unit, The pump body is connected to the mixed liquid spraying system, and the mixed liquid spraying system includes a mixed liquid liquid conveying pipeline and a number of outer spray heads for spraying the mixed liquid on the carrier I and inner spray heads on the carrier III, which can spray the mixed liquid on the carrier I , Ⅲ spray mixture. By spraying the mixed solution on the carrier III, the organic matter adsorbed on the carrier III is analyzed, and further digested and decomposed into CO ₂ and H ₂ O, thereby promoting the decomposition of pollutants and making the fully adsorbed carrier III continue to be produced again. The mixed liquid is leached to the carrier Ⅰ, and an external electric field is applied to strengthen the electron transfer between the microorganisms and the carrier Ⅰ, the organic matter and heavy metal ions in the waste liquid are degraded, and the mixed liquid of waste liquid and bacterial liquid can be leached and degraded in multiple units.

A method for co-processing flue gas dust, waste liquid and waste gas using the above-mentioned device, said method comprising the following steps:

1) The flue gas dust or exhaust gas is blown into the intake buffer chamber 1-2 of the box 1-1 from the air inlet 1-3, and the metal fume or organic waste gas is evenly diffused from the carrier I1-6 into the carrier II1-7 , then diffuse from the carrier II 1-7 into the carrier I 1-6, and discharge through the gas outlet 1-5 of the gas outlet buffer chamber 1-4;

2) Adsorption electrochemical co-processing unit 1 stops the air intake after processing flue gas dust or exhaust gas for a period of time, opens the lotion nozzle 3-2 to spray the lotion into the spray cover 3-1, and the lotion flows from the top wall of the box body 1 Enter the box through the small holes to recover the flue gas dust trapped by the carrier Ⅰ1-6 and carrier Ⅱ1-7; after spraying for a period of time, open the outlet of the washing liquid collection cover 3-3, and the washing liquid will flow from the bottom wall of the box to a small The hole enters the lotion storage 3-5 through the deflector 3-4, and recovers the lotion liquid; then continue to pass the flue gas dust or waste gas, and the high-temperature flue gas dust or waste gas will dry the carrier I and the carrier II, and restore the adsorption function;

3) The exhaust gas treated by the series or parallel adsorption electrochemical co-processing unit 1 enters the microbial electrochemical leaching subunit 2-1 through the pipeline, and is adsorbed or degraded by the carrier III 2-7 and carrier I, and the microbial electrochemical leaching unit The treated gas is directly discharged through the exhaust pipe 2-3 after being tested to meet the standard, and if it is not up to the standard, it will enter the adsorption electrochemical co-processing unit 1 again for advanced treatment, and the gas will be discharged after reaching the standard;

The mixed liquid in the bacterial liquid waste liquid mixing tank 2-5 is leached to the carrier I1-6 and the carrier III2-7 through the sprinkler head of the spray system, and is absorbed or degraded by the carrier III and the carrier I; after passing through the carrier III and the carrier I The mixed solution after adsorption or degradation is directly discharged from the discharge pipe 2-4 after the water quality is tested to be qualified. If the water quality does not meet the discharge standard, it can be returned to the microbial electrochemical leaching subunit 2-1 through the circulation pipe 2-6 for further treatment.

Specifically, the method of the flue gas dust, waste liquid, and waste gas co-processing device includes the following steps:

1) Blow metal fume or organic waste gas into the intake buffer chamber 1-2 of the box body 1-1, and the carrier I1-6 in the buffer chamber can effectively buffer the local impact of the air flow on the carrier II1-7, so that the exhaust gas is transported from the carrier Ⅰ diffuses into the carrier Ⅱ in a balanced manner. Under the condition of an external electric field, the waste gas and volatile metals are adsorbed through the carrier Ⅰ, and the organic macromolecular waste gas adsorbed on the carrier Ⅰ is electrolyzed into small molecular gases; the unadsorbed waste gas is electrolyzed The small molecule gases and volatile metals in the gas are adsorbed by the carrier II, and part of the unadsorbed waste gas diffuses to the outlet buffer chamber 1-4 and is re-adsorbed by the carrier I; Collect metals for subsequent recovery of metals; adjust the speed of the induced draft fan based on the type of exhaust gas. The electrolysis and adsorption processes in carrier I and carrier II are carried out synchronously, that is, in the cycle of adsorption and desorption, the degradation of organic macromolecular gas is completed while the carrier I and carrier II are regenerated. During this process, the outlets of the lotion nozzle 3-2 and the lotion collection cover 3-3 are in a sealed state during the waste gas adsorption process.

2) After the exhaust gas is treated by the adsorption electrochemical co-processing unit 1 for a period of time, the air intake is stopped, and the washing liquid is sprayed in the box to recover the metal fume trapped by the carrier Ⅰ1-6 and the carrier Ⅱ1-7; spray for a period of time Finally, open the outlet of the lotion collection cover 3-3, the lotion enters the lotion storage 3-5, and reclaims the liquid. Continue to ventilate at this time, the high-temperature gas can dry the carrier II1-7, and restore the adsorption function of the carrier II1-7.

3) The waste gas treated by the adsorption electrochemical co-processing unit 1 enters the microbial electrochemical leaching sub-unit 2-1 through the pipeline, part of the waste gas is adsorbed by the carrier III 2-7, and part of the gas is applied to both ends of the carrier I1-6 with a voltage After being degraded by the microbial electrochemical leaching unit, the exhaust gas continues to move to the subsequent adsorption electrochemical co-processing unit 1. The mixed liquid in the bacterial liquid waste liquid mixing tank 2-5 can be leached to the carrier Ⅰ1-6 and the carrier Ⅲ2-7 through the spray system, and the microorganisms on the carrier Ⅲ2-7 can degrade part of the organic matter in the mixed liquid, and the electric field is applied to accelerate the carrier The redox reaction rate on Ⅰ1-6 promotes the degradation of target pollutants. The water quality of the mixed liquid can be directly discharged from the discharge pipe 2-4 after passing the test. If the discharge standard is not met, it can be returned to any microbial electrochemical leaching subunit 2-1 through the circulation pipe 2-6 for further treatment.

4) The exhaust gas treated by the microbial electrochemical leaching unit enters the adsorption electrochemical co-processing unit 1 through the exhaust pipe 2-3, and undergoes advanced treatment under the action of the carrier I1-6, the carrier II1-7 and an external electric field, and the gas reaches the standard rear discharge.

The microbial electrochemical treatment unit of the present invention realizes the coordinated treatment of waste gas and waste liquid, and the process is continuously circulated in the microbial electrochemical leaching sub-units, that is, during the cycle degradation process of waste liquid in each leaching sub-unit, the waste gas is simultaneously deep degradation. The exhaust gas treated by the microbial electrochemical leaching unit can also enter the adsorption electrochemical treatment unit. The adsorption electrochemical treatment unit flexibly adjusts the number and assembly method of the devices according to the waste gas content, concentration and gas volume after the microbial electrochemical leaching unit. Under the action of carrier I, carrier II, external electric field and multiple devices in series, parallel or series-parallel, the exhaust gas is treated in depth to make the exhaust gas meet the emission standard. The whole device is recyclable, highly efficient and environmentally friendly.

The present invention provides a flue gas dust, waste liquid and waste gas co-processing device and method. The adsorption electrochemical treatment unit is under the action of carrier I, carrier II and an external electric field to adsorb and treat organic waste gas, intercept metal fume and dust, and realize Metal recovery, dust capture and carrier regeneration. In the microbial electrochemical leaching unit, carrier Ⅰ and carrier Ⅲ are suspended at different heights. The waste liquid is leached to the carrier Ⅰ and degraded under the action of microbial electrochemistry. The mixture of waste liquid and bacterial liquid is leached and degraded in multiple units. Part of the waste gas discharged from the adsorption electrochemical treatment unit is adsorbed by the carrier III and degraded by microorganisms. The waste gas not absorbed by the carrier III and the waste gas generated by the microbial electrochemical leaching unit to treat the waste liquid are in the process of running between the carrier I and the carrier III. Degraded by the microorganisms in the leachate, or adsorbed and degraded by the carrier I and the carrier III, the process is continuously circulated in the microbial electrochemical leaching unit, that is, during the cycle degradation process of the waste liquid in each leaching subunit, the waste gas simultaneously deep degradation. The device has a simple structure. By combining physical adsorption, electrolysis, interception, leaching absorption, microbial degradation, re-adsorption, and electrolysis, the carrier is regenerated and recycled by using electrochemical technology and microbial electrochemical system, and the electrons in the oxidation-reduction reaction are carried out. Orientation, speed up the reaction rate, so that the flue gas dust, waste liquid, and waste gas are co-treated to meet the emission standards.

In the present invention, microorganisms use waste liquid and organic matter in waste gas as substrates, without adding culture medium, and have low cost and low energy consumption. It adapts to the change of processing capacity and concentration through series-parallel connection, small footprint, simple process and easy operation. Comply with the development trend of energy saving and emission reduction.

Description of drawings

Fig. 1 is a kind of flue gas dust, waste liquid, waste gas co-processing device structure schematic diagram of the present invention;

Fig. 2 is the schematic diagram of the structure of the adsorption-electrochemical co-processing device;

Fig. 3 is the schematic diagram of the structure of the microbial electrochemical leaching device;

Reference signs:

1. Adsorption electrochemical processing unit; 1-1, box body; 1-2, air intake buffer chamber; 1-3, air inlet; 1-4, air outlet buffer chamber; 1-5, air outlet, 1-6 , carrier Ⅰ, 1-7, carrier Ⅱ; 2, microbial electrochemical leaching unit; 2-1, microbial electrochemical leaching sub-unit; 2-2, intake pipe; 2-3, exhaust pipe; 2-4 , liquid discharge pipeline; 2-5, bacterial liquid waste liquid mixing tank; 2-6, circulation pipeline, 2-7, carrier III; 3, metal recovery unit; 3-1, spray hood; 3-2, lotion Nozzle; 3-3, lotion collecting cover; 3-4, deflector; 3-5, lotion storage.

Detailed ways

Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. Unless expressly stated otherwise, each feature is only one example of a series of equivalent or similar features. The description is only to help the understanding of the present invention, and should not be regarded as a specific limitation on the present invention.

The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

Example 1

As shown in Figures 1-3, a flue gas dust, waste liquid, and waste gas co-processing device, the co-processing device includes one or more adsorption electrochemical treatment units 1, microbial electrochemical leaching units 2 and metal recovery Unit 3;

When there are multiple adsorption electrochemical treatment units, the connection mode of the multiple adsorption electrochemical treatment units is series or parallel; the connection mode of one or more adsorption electrochemical treatment units and the microbial electrochemical leaching unit is series or parallel connection;

The metal recovery unit 3 includes a lotion spraying part and a lotion collecting part;

The adsorption electrochemical treatment unit 1 comprises a box body 1-1, the center of the box body 1-1 is filled with a carrier II 1-7, and the space between the carrier II1-7 and the box body wall of the box body 1-1 is filled with a carrier I 1-6, and a small space is left between the carrier I 1-6 and the left side wall of the casing 1-1 to form an air intake buffer chamber 1-2, between the carrier I and the right side wall of the casing 1-1 Leave a small space between them to form an air outlet buffer chamber 1-4; the air inlet buffer chamber 1-2 is provided with an air inlet 1-3, and the air outlet buffer chamber 1-4 is provided with an air outlet 1-5;

A number of small holes are evenly arranged on the top wall of the box body 1-1, and a lotion spraying part is arranged on the upper part of the top wall;

A number of small holes are evenly arranged on the bottom wall of the box body 1-1, and a lotion collecting part is arranged on the bottom wall;

The microbial electrochemical leaching unit 2 includes an N-level microbial electrochemical leaching subunit 2-1, and the upper part of the first-level microbial electrochemical leaching subunit in the N-level microbial electrochemical leaching subunit 2-1 is set into Trachea 2-2, the upper part of the last stage microbial electrochemical leaching subunit is provided with an exhaust pipe 2-3, and the lower part is provided with a drain pipe 2-4; the N-level microbial electrochemical leaching subunit 2-1 is connected to the The bacterial liquid waste liquid mixing tank 2-5 is connected, and the leachate formed at the bottom of the N-level microbial electrochemical leaching subunit 2-1 can return to the N-level microbial electrochemical leaching subunit 2-1 through the circulation pipeline 2-6 Continue to carry out leaching treatment at the top;

In the microbial electrochemical leaching subunit 2-1, carriers I 1-6 and carriers III 2-7 are arranged in a staggered manner.

The lotion spraying part includes a spray cover 3-1 and a lotion spray head 3-2, the spray cover 3-1 is buckled on the top wall of the box body 1-1, and the lotion spray head 3-2 is set On the spray hood, it is used to spray the lotion in the small hole on the top wall of the box;

The lotion collection part includes a lotion collection cover 3-3, a deflector 3-4 and a lotion storage 3-5, and the lotion collection cover is buckled on the bottom wall of the box body 1-1 for collecting The washing liquid flows out from the small hole on the bottom wall; the deflector is arranged obliquely in the washing liquid collecting cover; the washing liquid collecting cover communicates with the washing liquid storage through a pipeline.

The included angle between the deflector plate and the bottom wall of the box body 1-1 is 2-10°.

The diameter of the small hole is 1-10mm.

The top of the microbial electrochemical leaching subunit 2-1 is provided with a spray head for spraying the waste liquid on the carrier I 1-6 and the carrier III 2-7.

The carrier I is a gas-permeable conductive material, and conductive titanium wires are embedded on the carrier I to connect with an external electric field; the carrier II is a loose and porous conductive material; the carrier III is an adsorption material with a large specific surface area and a developed microporous structure.

Both the inner walls of the adsorption electrochemical treatment unit 1 and the microbial electrochemical leaching unit 2 are coated with corrosion-resistant materials.

The metal fume or organic waste gas in the adsorption electrochemical treatment unit 1 enters the intake buffer chamber 1-2 through the air inlet 1-3 connected to the box body 1-1, and the intake buffer chamber is formed by the carrier I1- 6 and the box together, the carrier I1-6 can effectively buffer the local impact of the air flow on the carrier II1-7, so that the exhaust gas can be diffused and entered by the carrier I from five directions: up, down, left, right, and front. Carrier II and carrier I absorb part of the exhaust gas to enhance the adsorption effect; after the carrier II absorbs the exhaust gas, part of the unadsorbed exhaust gas diffuses to the outlet buffer chamber 1-4 and is re-adsorbed by the carrier I; the outlet buffer chamber is made of the carrier I and the box are jointly formed, and the carrier I and the carrier II intercept the metal fume at the same time, which can enrich the metal for subsequent metal recovery; the outlet of the lotion nozzle 3-2 and the lotion collection cover 3-3 It is in a sealed state during the adsorption process.

Conductive titanium wires are embedded on the carrier I1-6, which can be connected to an external electric field. The voltage of the external electric field is 3-10V. Under the condition of an external electric field, exhaust gas and volatile metals are adsorbed through the carrier I, and at the same time The organic macromolecule waste gas in carrier I is electrolyzed into small molecular gas. Unadsorbed exhaust gas, electrolyzed small molecular gas and volatile metals enter the carrier II1-7, while the three are adsorbed, the former two are electrolyzed into small molecular gas or smaller molecular gas. As the gas and volatile metals advance in the carrier II, the above process continues to circulate, so that the exhaust gas is adsorbed. Based on the type of exhaust gas, the speed of the induced draft fan is adjusted, and the residence time in the carrier II is adjusted so that the exhaust gas is degraded and adsorbed. The electrolysis and adsorption processes in carrier I and carrier II are carried out synchronously, that is, in the cycle of adsorption and desorption, the degradation of organic macromolecular gas is completed while the carrier I and carrier II are regenerated. The economic cost of the whole device is relatively low, the processing result is more thorough, time-saving, energy-saving and environment-friendly.

After a period of adsorption, the exhaust gas stops entering the air. The top wall of the box is evenly distributed with small holes with a diameter of 1-10mm. The lotion is sprayed in the box, and the lotion enters the box through the small holes through the lotion nozzle. In the box, it is used to recover the metal fume trapped by the carrier I and the carrier II; the washing liquid is nitric acid or acetic acid or sodium hydroxide solution; the bottom wall of the box is distributed with small holes with a diameter of 1-10mm; Carrier Ⅰ of the same size is placed on the top of the partition at the bottom of the box to prevent carrier Ⅱ from flowing away with the liquid; the inside of the unit is coated with a corrosion-resistant material coating. After spraying for a period of time, open the outlet of the lotion collection cover, the lotion enters the lotion storage 3-5, and recovers the liquid. At this time, continue to ventilate, and the high-temperature gas can dry the carrier II and restore the adsorption function of the carrier II.

The left side of the microbial electrochemical leaching unit is connected with an intake pipe for transporting the gas treated with heavy metal fume to the leaching subunit, and the waste gas enters the microbial electrochemical leaching unit after being treated with metal fume. The microbial electrochemical leaching unit mainly includes carriers I1-6 and carriers III2-7. The carrier I and carrier III are arranged in a staggered manner, which prolongs the running channel of the exhaust gas in the leaching sub-unit and increases the residence of the exhaust gas in the device. Time, strengthen the treatment effect. Part of the waste gas discharged from the adsorption electrochemical treatment unit is adsorbed by the carrier III and degraded by microorganisms. The waste gas not absorbed by the carrier III and the waste gas generated by the microbial electrochemical leaching unit to treat the waste liquid are in the process of running between the carrier I and the carrier III. Degraded by microorganisms in the leachate, or adsorbed and degraded by carrier I and carrier III.

The top of the leaching sub-unit is connected with a pipeline for conveying the mixed liquid of bacteria liquid-waste liquid, the bottom end of the sub-unit of the leaching filter is connected with a pipeline for circulating the mixed liquid of bacteria liquid-waste liquid, and the right side of the leaching unit is provided with a pipe for discharging the mixed liquid.

The multi-stage microbial electrochemical leaching units are connected by pipes, and the waste liquid is treated by the leaching sub-units and enters the next-stage leaching sub-units through the pipeline at the bottom of the leaching sub-units. The multi-stage leaching subunits work in series, and the mixed liquor passes through multiple treatment units continuously to enhance the treatment effect. The leaching sub-units are connected by pipes, and the number of cycles can be flexibly adjusted according to the water quality on site in practical applications.

The carrier III has small and uniform micropores, simple structure, high adsorption speed and easy desorption, and is used for adsorbing waste gas in the leaching unit.

The carrier I is a green and environment-friendly inert electrode material with large specific surface area, good electrical conductivity and long service life, and can provide a large number of adsorption sites required for microbial adsorption.

Before the waste liquid enters the bacterial liquid waste liquid mixing tank, it undergoes a series of pre-treatments such as water quality adjustment and pH adjustment, and is mixed with a certain amount of bacterial liquid at a ratio of 10%. To the pump body of the leaching sub-unit, the pump body is connected to the mixed liquid spraying system, and the mixed liquid spraying system includes a mixed liquid liquid conveying pipeline and several external spray heads for spraying the mixed liquid onto the carrier I and the carrier III The inner spray head on the top, by spraying the mixed solution on the carrier III, decomposes the organic matter adsorbed on the carrier III, and further digests and decomposes it into CO ₂ and H ₂ O, thereby promoting the decomposition of pollutants and making the fully adsorbed carrier III continue to produce again.

The two ends of the carrier I are connected to an external electric field, and the microbial electrolytic cell is used as the prototype. Through the action of the external electric field, the electron transfer between the microorganism and the carrier I is strengthened, the metabolism of the microorganism is accelerated, and the organic matter is degraded based on the two-dimensional electrode, so that the carrier I The adsorbed waste gas and waste liquid are degraded into small molecular gases or CO ₂ and H ₂ O, and the degraded carrier I has adsorption capacity again, achieving the purpose of degrading while adsorbing. The water quality can be detected at the discharge pipe of the bacteria liquid-waste liquid mixture, and can be discharged from the pipe after the water quality is qualified. On the contrary, it continues to enter the microbial electrochemical system through the pipeline for processing.

The method of the flue gas dust, waste liquid and waste gas co-processing device comprises the following steps:

1) Blow metal fume or organic waste gas into the intake buffer chamber 1-2 of the box body 1-1, and the carrier I1-6 in the buffer chamber can effectively buffer the local impact of the air flow on the carrier II1-7, so that the exhaust gas is transported from the carrier Ⅰ diffuses into the carrier Ⅱ in a balanced manner. Under the condition of an external electric field, the waste gas and volatile metals are adsorbed through the carrier Ⅰ, and the organic macromolecular waste gas adsorbed on the carrier Ⅰ is electrolyzed into small molecular gases; the unadsorbed waste gas is electrolyzed The small molecule gases and volatile metals are adsorbed by the carrier II1-7, and part of the unadsorbed waste gas diffuses to the outlet buffer chamber 1-4 and is re-adsorbed by the carrier I; the above process is continuously cycled, and the metal fume is intercepted by the carrier I and the carrier II , to enrich metals for subsequent recovery of metals; based on the type of exhaust gas, adjust the speed of the induced draft fan. The electrolysis and adsorption processes in carrier I and carrier II are carried out synchronously, that is, in the cycle of adsorption and desorption, the degradation of organic macromolecular gas is completed while the carrier I and carrier II are regenerated. During this process, the outlets of the lotion nozzle 3-2 and the lotion collection cover 3-3 are in a sealed state during the waste gas adsorption process.

2) After the exhaust gas is treated by the adsorption electrochemical co-processing unit 1 for a period of time, the air intake is stopped, and the washing liquid is sprayed in the box to recover the metal fume trapped by the carrier Ⅰ1-6 and the carrier Ⅱ1-7; spray for a period of time Finally, open the outlet of the lotion collection cover 3-3, the lotion enters the lotion storage 3-5, and reclaims the liquid. Continue to ventilate at this time, the high-temperature gas can dry the carrier II1-7, and restore the adsorption function of the carrier II1-7.

3) The waste gas treated by the adsorption electrochemical co-processing unit 1 enters the microbial electrochemical leaching sub-unit 2-1 through the pipeline, part of the waste gas is adsorbed by the carrier III 2-7, and part of the gas is applied to both ends of the carrier I1-6 with a voltage After being degraded by the microbial electrochemical leaching unit, the exhaust gas continues to move to the subsequent adsorption electrochemical co-processing unit 1. The mixed liquid in the bacterial liquid waste liquid mixing tank 2-5 can be leached to the carrier Ⅰ1-6 and the carrier Ⅲ2-7 through the spray system, and the microorganisms on the carrier Ⅲ2-7 can degrade part of the organic matter in the mixed liquid, and the electric field is applied to accelerate the carrier The redox reaction rate on Ⅰ1-6 promotes the degradation of target pollutants. The water quality of the mixed liquid can be directly discharged from the discharge pipe 3-4 after passing the test. If the discharge standard is not met, it can be returned to any microbial electrochemical leaching subunit 2-1 through the circulation pipe 2-6 for further treatment.

4) The exhaust gas treated by the microbial electrochemical leaching unit enters the adsorption electrochemical co-processing unit 1 through the exhaust pipe 2-3, and undergoes advanced treatment under the action of the carrier I1-6, the carrier II1-7 and an external electric field, and the gas reaches the standard rear discharge.

The adsorption electrochemical treatment unit is based on physical adsorption, electrolysis, and interception system to treat waste gas and dust. The carrier provides multiple adsorption sites, which can efficiently treat waste gas and dust. The microbial electrochemical leaching unit treats waste gas and waste liquid. It is based on the oxidation-reduction reaction driven by the external circuit to build an electrochemical catalytic oxidation system; microorganisms are adsorbed on the surface of a carrier with a large specific surface area and good conductivity, and the molecules pass through the liquid or gas phase. When carrying electrodes, microorganisms use these waste gas and waste liquid molecules as substrates, decompose, digest and metabolize, and the external circuit accelerates electron transfer, and finally generates non-polluting inorganic substances. The microbial electrochemical system can quickly and efficiently remove pollutants in the mixed waste gas. The removal rate of H ₂ S, mercaptans, sulfides, etc. with an average concentration of 10-100ppm is over 99%, and the metal fume after treatment is ≤0.05mg/m ³ . For waste liquid, effluent CODcr≤100mg/L, TN≤20mg/L, NH ₄ ⁺ ≤8mg/L. This device can treat waste gas and waste liquid separately, and can also realize the coordinated treatment of waste gas and waste liquid.

Example 2

The malodorous gas produced by the sewage treatment plant of a refining and chemical enterprise is blown into the air inlet by a blower. The gas flow meter controls the air intake to 530m ³ /h. After the water quality is adjusted in the early stage, the sewage enters the bacterial liquid waste liquid mixing tank. The liquid spray system enters the leaching chamber, and the voltage is 8-10V. After ten days of system operation, COD dropped from 8548mg/L to 81mg/L, ammonia nitrogen dropped from 203.69mg/L to 5.8mg/L, VOC removal rate was as high as 86%, and the exhaust gas met the standard. Benzene≤0.4mg/m ³ ; Toluene≤0.6mg/m ³ ; Xylene≤1.9mg/m ³ .

Example 3

A lead-zinc smelter mainly produces heavy metal waste gas (mainly heavy metals include Pb, Zn, Cd, and As, mainly lead and zinc) and sulfur-containing waste gas during the smelting process; produces zinc-cadmium wastewater and polluted acid wastewater, of which Contains a large amount of heavy metal ions. The Pb content in the heavy metal waste gas is 62.22mg/m ³ , the Zn content is 140mg/m ³ , the Cd content is 1.83mg/m ³ , and the As content is 1.74mg/m ³ . The waste gas is blown into the air inlet. The device uses five The parallel adsorption electrochemical treatment unit is arranged with another two serial microbial electrochemical leaching units. The gas flow meter controls the intake volume to 2000m ³ /h, and the voltage is 5-8V. During this process, the metal fume is adsorbed and retained by the carrier Ⅰ and carrier Ⅱ; after a period of time, the ventilation is stopped, the washing liquid nozzle is turned on, and the sodium hydroxide solution is sprayed for 3 hours to recover the metal liquid. Continue to ventilate afterwards, the high temperature gas can dry the carrier II, and at the same time absorb waste gas. The waste gas that has not been degraded by adsorption enters the microbial electrochemical leaching unit along with the pipeline and continues to be degraded. Mix zinc-cadmium wastewater and polluted acid wastewater to adjust the pH to neutral, and the mixed wastewater contains Zn ²⁺ , Pb ²⁺ , Cd ²⁺ , and Cu ²⁺ respectively at 1630mg/L, 15mg/L, 23mg/L, 6mg/L. Put it into the bacteria liquid waste liquid mixing tank, and spray it with the pipeline to the microbial electrochemical leaching unit. The unit uses six-stage leaching subunits to work in series, and a voltage of 10v is applied. The heavy metal ions in the mixed wastewater interact with the microorganisms adsorbed on the carrier Ⅰ and carrier Ⅲ or are adsorbed by the microorganisms to achieve the purpose of degrading the heavy metal ions; at the same time, under the action of an external electric field, a part of the heavy metal ions can be electrolyzed to reduce the concentration of the heavy metal ions. toxicity. Among them, the waste gas is absorbed and degraded by microorganisms, or is adsorbed and degraded by the carrier I and the carrier III during the operation process between the high and low staggered arrangement of the carrier I and the carrier III, and the waste gas that is not degraded by adsorption enters the adsorption electrochemical treatment unit. The units are connected in series in three stages, and a voltage of 8v is applied. Under the action of carrier I, carrier II and an external electric field, the waste gas is adsorbed and treated. The waste liquid is continuously circulated in the microbial electrochemical leaching unit. After 5 days of treatment, Pb≤0.05mg/m ³ , Zn≤0.03mg/m ³ , Cd≤0.08mg/m ³ , As≤0.2 in the metal fume mg/m ³ , reaching the emission standard. Zn ²⁺ in the wastewater is ≤0.9mg/L, and other ions are ≤0.1mg/L, meeting the discharge standards of lead and zinc industrial pollutants.

Example 4

The process of extracting vanadium pentoxide from stone coal will produce a lot of waste gas and waste water. The harmful components of waste gas are mainly SO ₂ , followed by HCl, soot and Cl ₂ ; the waste water mainly includes acid waste water and ammonia nitrogen waste water. At present, vanadium extraction enterprises from stone coal mostly adopt ammonium salt vanadium precipitation process, and the ammonia nitrogen wastewater produced by vanadium precipitation is not directly discharged by the treatment plant, or is not discharged up to the standard, causing significant damage to the environment. Blast the generated waste gas (SO ₂ content is 2500mg/L) into the multi-stage adsorption electrochemical treatment unit, adopt three-stage parallel connection and then two-stage series connection, control the blowing gas flow rate to 1500m ³ /h; apply 5v voltage, in which the smoke dust is Carrier Ⅰ and carrier Ⅱ are intercepted, and the exhaust gas is adsorbed and degraded; the undegraded exhaust gas enters the microbial electrochemical leaching device. Mix the acidic wastewater and ammonia nitrogen wastewater in the wastewater, adjust the pH to neutral ammonia nitrogen content of 4000mg/L, then pour it into the bacteria liquid waste liquid mixing tank, and spray it to the microbial electrochemical leaching unit along with the pipeline, using three The stage leaching units work in series. The substances in the mixed wastewater are degraded by the microorganisms adsorbed on the carrier I and the carrier III; the waste gas is absorbed and degraded by the microorganisms, or is absorbed by the carrier I and the carrier III during the operation process of the waste water between the carrier I and the carrier III arranged in a high and low order. , Degradation, and the waste gas that has not been adsorbed and degraded enters the adsorption electrochemical treatment unit. It adopts two-stage series work and applies a voltage of 5v. Under the action of carrier Ⅰ, carrier Ⅱ and an external electric field, the waste gas is adsorbed and treated. After ₅ days of treatment, the ammonia nitrogen was 20mg/L, and the SO2 concentration was 300mg/L, meeting the emission standards.

Example 5

The pollution of pig raising wastewater and waste gas has surpassed the pollution of domestic sewage and industrial wastewater, and has become one of the most important sources of environmental pollution. Pig house flushing water is the main source of pig raising wastewater. For a pig house with a scale of about 1200 heads, the average daily flow of pig raising wastewater is 30.0m ³ /d, of which COD _cr is 8000mg/L and BOD ₅ is 4000mg/L. Ammonia nitrogen is 1300mg/L; pig house flushing water control flow rate is 30.0m ³ /d, the flushing water is transported to the bacteria liquid waste liquid mixing tank by pipeline, and then the mixed solution is sprayed to the microbial electrochemical leaching unit through the pipeline; 5v voltage. The microbial electrochemical leaching unit uses ten stages of leaching sub-units to work in series. In the microbial electrochemical leaching device, carrier Ⅰ and carrier Ⅲ are suspended at different heights, and the mixed solution is leached to carrier Ⅰ. Under the aerobic state of microorganisms, the organic matter in the wastewater is decomposed into H ₂ O, CO ₂ , N ₂ and other inorganic substances through metabolism. The mixture is degraded by circulating leaching in multiple units. At the same time, the generated waste gas is absorbed and degraded by microorganisms, or is adsorbed and degraded by the carrier Ⅰ and carrier Ⅲ during the operation process of the waste water between the carrier Ⅰ and the carrier Ⅲ, which is not adsorbed and degraded, and the waste gas that is not adsorbed and degraded enters the adsorption electrochemical treatment The unit adopts three stages in series and applies a voltage of 8v. Under the action of carrier I, carrier II and an external electric field, the waste gas is adsorbed and treated. This process is continuously circulated in the microbial electrochemical leaching unit, that is, during the cycle degradation process of the waste liquid in each leaching unit, the waste gas is deeply degraded at the same time. After 5 days of treatment, COD _cr was 300mg/L, BOD ₅ was 100mg/L, ammonia nitrogen was 70mg/L, no foul smell, and reached the discharge standard.

Example 6

A pharmaceutical factory with a wastewater discharge volume of 4000m ³ /d, the main components of organic matter in the wastewater are sugars, organic acids, glycosides, lignin, alkaloids, etc., accompanied by the generation of organic waste gas. Influent COD _cr is 19000mg/L, BOD ₅ is 12000mg/L, NH ₃ -N is 1280mg/L, SS is 500mg/L. The adsorption electrochemical treatment unit and the microbial electrochemical leaching unit operate in parallel, and the organic substances in the waste gas are decomposed under the action of an external electric field. Wastewater can directly enter the microbial electrochemical leaching unit. Complex macromolecules and insoluble organic substances are first hydrolyzed into small molecules and soluble organic substances under the action of extracellular enzymes, and then penetrate into the cells to decompose to produce volatile organic acids, alcohols, Aldehydes etc. The leaching units work in series. After multiple cycles, the effluent COD _cr is 87mg/L, BOD ₅ is 20mg/L, NH ₃ -N is 1280mg/L, and SS is 150mg/L. The water quality reaches the discharge standard.

Example 7

Iron and steel plant waste gas sulfur dioxide flue gas, flue gas containing fluorine, flue gas containing nitrogen oxides and solid particles, etc. The content of COD _cr in wastewater is 220mg/L, BOD ₅ is 200mg/L, SS is 280mg/L, and NH ₃ -N is 40mg/L. The adsorption electrochemical treatment unit and the microbial electrochemical leaching unit operate in parallel, and the exhaust gas enters the adsorption electrochemical treatment unit, and under the action of carrier I, carrier II and an external electric field, flue gas and solid particles are trapped. When the waste liquid enters the chemical leaching unit, the organic matter in the wastewater is decomposed under the action of microorganisms, the long-chain organic matter is degraded into short-chain organic matter, and the refractory matter is converted into degradable matter, which improves the biodegradability of the waste water. After treatment, the effluent COD _cr is 10mg/L, BOD ₅ is 20mg/L, SS is 5mg/L, and NH ₃ -N is 5mg/L, meeting the emission standards. Exhaust gas is detected, sulfur dioxide is 0.4mg/m ³ , fluoride is 18ug/m ³ , nitrogen oxides is 0.13mg/m ³ , and solid particles are 1.8mg/m ³ .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all should be covered by the present invention. within the scope of the claims.

Claims (8)

1. A flue gas dust, waste liquid, exhaust gas co-processing device, is characterized in that, described co-processing device comprises one or more adsorption electrochemical treatment units (1), microbial electrochemical leaching unit (2) and metal recovery unit (3); When there are multiple adsorption electrochemical treatment units, the connection mode of the multiple adsorption electrochemical treatment units is series or parallel; the connection mode of one or more adsorption electrochemical treatment units and the microbial electrochemical leaching unit is series or parallel connection; The metal recovery unit (3) includes a lotion spraying part and a lotion collecting part; The adsorption electrochemical treatment unit (1) comprises a box body (1-1), the center of the box body (1-1) is filled with a carrier II (1-7), and the carrier II (1-7) and the box body (1-1 1) The space between the box walls is filled with the carrier I (1-6), and a small space is left between the carrier I (1-6) and the left side wall of the box (1-1) to form an air intake buffer Chamber (1-2), leaving a small space between the carrier I (1-6) and the right side wall of the casing (1-1) to form the air outlet buffer chamber (1-4); the intake buffer chamber (1- 2) Set the air inlet (1-3), and set the air outlet (1-5) in the air outlet buffer chamber (1-4); A number of small holes are evenly arranged on the top wall of the box body (1-1), and a lotion spraying part is arranged on the upper part of the top wall; A number of small holes are evenly arranged on the bottom wall of the box body (1-1), and a lotion collecting part is arranged on the bottom wall; The microbial electrochemical leaching unit (2) includes an N-level microbial electrochemical leaching subunit (2-1), and the first-stage microbial electrochemical leaching in the N-level microbial electrochemical leaching subunit (2-1) An air inlet pipe (2-2) is arranged on the upper part of the filter unit, an exhaust pipe (2-3) is arranged on the upper part of the last stage microbial electrochemical leaching subunit, and a drain pipe (2-4) is arranged on the lower part; The chemical leaching subunits (2-1) are all connected to the bacterial liquid waste liquid mixing tank (2-5) through pipelines, and the leachate formed at the bottom of the N-level microbial electrochemical leaching subunits (2-1) can pass through The circulation pipeline (2-6) returns to the top of the N-level microbial electrochemical leaching subunit (2-1) to continue leaching treatment; The microbial electrochemical leaching subunit (2-1) arranges carrier I (1-6) and carrier III (2-7) in a staggered manner, and an electric field is applied to both ends of the carrier I, and the voltage is 3-5V. 2. The flue gas dust, waste liquid and waste gas co-processing device according to claim 1, characterized in that, the lotion spraying part comprises a spray cover (3-1) and a lotion spray head (3-2) , the spray cover (3-1) is buckled on the top wall of the box (1-1), and the lotion nozzle (3-2) is arranged on the spray cover for spraying the lotion on the box In the small hole of the top wall of the body; The lotion collection part includes a lotion collection cover (3-3), a deflector (3-4) and a lotion storage (3-5), and the lotion collection cover is buckled on the box body (1-1) On the bottom wall of the bottom wall, it is used to collect the washing liquid flowing out from the small hole on the bottom wall; the deflector is arranged obliquely in the washing liquid collecting cover; the washing liquid collecting cover communicates with the washing liquid storage through a pipeline. 3. The flue gas dust, waste liquid and waste gas co-processing device according to claim 2, characterized in that the angle between the deflector and the bottom wall of the box (1-1) is 2-10°. 4. The flue gas dust, waste liquid, and waste gas co-processing device according to claim 1, characterized in that the aperture of the small hole is 1-10mm. 5. The flue gas dust, waste liquid and waste gas co-treatment device according to claim 1, characterized in that, the top of the microbial electrochemical leaching subunit (2-1) is provided with a spray head for spraying the waste liquid On Vector I and Vector III. 6. The flue gas dust, waste liquid, and waste gas co-processing device according to claim 1, characterized in that the carrier I is a breathable conductive material, and conductive titanium wires are embedded on the carrier I to connect with an external electric field; II is a loose and porous conductive substance; carrier III is an adsorption material with a large specific surface area and a well-developed microporous structure. 7. The flue gas dust, waste liquid, and waste gas co-treatment device according to claim 1, characterized in that, the inner walls of the adsorption electrochemical treatment unit (1) and the microbial electrochemical leaching unit (2) are all coated with Corrosion-resistant material coating. 8. A method for co-processing flue gas dust, waste liquid, and waste gas using the device described in any one of claims 1-7, said method comprising the steps of: 1) Blast the flue gas dust or exhaust gas from the air inlet (1-3) into the intake buffer chamber (1-2) of the box (1-1), and the metal fume or organic waste gas is transported by the carrier I (1- 6) Balanced diffusion into the carrier II (1-7), then diffuse from the carrier II (1-7) into the carrier I (1-6), and discharge through the gas outlet (1-5) of the gas outlet buffer chamber (1-4) ; 2) The adsorption electrochemical co-processing unit (1) stops the air intake after processing the flue gas dust or waste gas for a period of time, and opens the lotion nozzle (3-2) to spray the lotion into the spray cover (3-1). Enter the box from the small hole on the top wall of the box (1), and recover the flue gas dust trapped by the carrier I (1-6) and carrier II (1-7); after spraying for a period of time, open the lotion collection cover ( 3-3), the lotion enters the lotion storage (3-5) through the deflector (3-4) from the small hole in the bottom wall of the box, and recovers the lotion liquid; then continue to pass the flue gas dust or waste gas , the high-temperature flue gas dust or exhaust gas will dry the carrier I and the carrier II, and restore the adsorption function; 3) The exhaust gas treated by the series or parallel adsorption electrochemical co-processing unit (1) enters the microbial electrochemical leaching subunit (2-1) through the pipeline, and is adsorbed or degraded by carrier III (2-7) and carrier I , the gas treated by the microbial electrochemical leaching unit is directly discharged through the exhaust pipe (2-3) after being tested up to the standard, and if it is not up to the standard, it enters the adsorption electrochemical co-processing unit (1) again for advanced treatment, and the gas is discharged after reaching the standard; The mixed liquid in the bacterial liquid waste liquid mixing tank (2-5) is leached and filtered to the carrier I (1-6) and the carrier III (2-7) through the spray head of the spray system, and is adsorbed by the carrier III and the carrier I or Degradation; the mixed solution after being adsorbed or degraded by carrier III and carrier I is directly discharged from the discharge pipe (2-4) after the water quality is tested, and if the water quality does not meet the discharge standard, it can be returned to the microorganism through the circulation pipe (2-6) The electrochemical leaching subunit (2-1) continues to process.