WO2022241664A1

WO2022241664A1 - Method for treating industrial waste gas, and device

Info

Publication number: WO2022241664A1
Application number: PCT/CN2021/094508
Authority: WO
Inventors: 王友善
Original assignee: 王友善
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-11-24

Abstract

A method for treating industrial waste gas, the method comprising: adding industrial waste gas and a porous material into a mixer for adsorption, and after completion of adsorption, feeding a gas-solid mixture into a separator to separate a gas from the broken porous material that adsorbed the industrial waste gas, wherein a mechanical treatment means is used in the mixer to make the porous material vigorously collide in the industrial waste gas, such that the industrial waste gas is adsorbed on the porous material, and the mechanical treatment is used to synchronously break the porous material which adsorbs the industrial waste gas, so as to further adsorb the industrial waste gas. The method not only has the function of adsorbing industrial waste gas by means of a porous material in a gas-solid flow state, but also has the function of continuously breaking the porous material, thereby realizing the long-term and high-efficiency treatment of industrial waste gas.

Description

A method and equipment for treating industrial waste gas

technical field

The application relates to the field of environmental protection, in particular to a method and equipment for treating industrial waste gas, especially suitable for the treatment of VOC, VOCs and dust in industrial waste gas, and realizes zero carbon emission in industrial waste gas treatment.

Background technique

With the rapid development of urbanization and industrialization, human activities such as energy, industry, and transportation discharge a large amount of pollutants into the atmosphere. Industrial waste gas treatment refers to the pretreatment of waste gas produced in industrial places such as factories and workshops before being discharged to the outside, so as to meet the national standards for external discharge of waste gas. General industrial waste gas treatment includes organic waste gas treatment, dust waste gas treatment, acid-base waste gas treatment, odor waste gas treatment and air sterilization, disinfection and purification. Industrial waste gas treatment gases specifically include acetone, methyl ethyl ketone, butanol, methanol, formaldehyde, benzene, toluene, xylene, styrene, methyl tert-butyl ether, ethyl acetate, methylene chloride, ethane, pentane, Treatment of natural gas, automobile exhaust, hydrogen sulfide, hydrogen disulfide, mercaptan, ammonia and various organic waste gases, acid and alkali waste gases and waste gases. In addition to conventional air pollutants, the emission of volatile organic compounds (VOC) has attracted more and more attention. VOC is a key precursor of atmospheric ozone and secondary organic aerosol pollution. It is an important cause of haze and photochemical smog. In addition to affecting the environment, VOC also has high-risk biological toxicity and is potentially harmful to human health and plant growth. . Among many emission sources, industrial emission is an important source of VOC pollution in the environment. Therefore, controlling VOC emission from industrial sources will help reduce the concentration of PM2.5 and O ₃ , which is very important for the improvement of regional atmospheric environment.

At present, the treatment methods of industrial waste gas mainly include: liquid recovery method, adsorption method, combustion method, condensation method, photocatalytic oxidation method, low temperature plasma method, etc.

Chinese Invention Application Patent Publication No.: CN112387059A Publication Date: 20190816 discloses a circulating mobile adsorption device for adsorption materials for tail gas treatment. This invention is provided with adsorption tank and desorption tank. After the adsorption is completed, the adsorption material needs to be desorbed.

Chinese invention patent application publication number: CN105536519A, publication date: 20160504 discloses a VOC purification and separation method. The VOC purification and separation method is to combine the gas containing VOC organic waste gas with a structured fixed bed that is coupled with adsorption and catalysis, so that the gas containing VOC organic waste gas is purified and separated to obtain purified air. The structured fixed bed It is filled with granular material and gradient material. The device uses fixed particle packing and fixed bed to adsorb VOC, and the VOC adsorption efficiency is not high.

Chinese Invention Patent Application Publication No.: CN105944503A, Publication Date: 2016092 discloses an online cycle regeneration organic waste gas treatment method and device, the device includes a cyclone tower, a liquid storage tank, a sedimentation tank, a biological desorption chamber, and The storage room on the side of the attached room; the bottom of the cyclone tower is connected to the sedimentation tank through pipelines; the bottom of the sedimentation tank is equipped with a centrifugal pump, and the adsorbent particles in it are transported to the biological desorption chamber through the centrifugal pump; the cyclone tower There are a plurality of swirl atomizing nozzles arranged in tangential circles at intervals on the lower side of the wall; organic absorbent solution, desorbed adsorbent particle balls and organic waste gas are sprayed into the swirl in a tangential circle from the swirl atomizing nozzles. The flow tower is fully mixed, and flows along the inner wall of the swirl tower in a circumferential direction and spirally rises. This method uses organic absorbent solution, desorbed adsorbent particle balls and organic waste gas to mix, and the organic absorbent solution will affect the adsorption of the adsorbent particle balls, causing the adsorption efficiency of the adsorbent particle balls to be affected. Afterwards, desorption treatment is required in the biological desorption chamber.

The above-mentioned devices and methods generally require the adsorption material to be made into an adsorption component or a fixed-bed reaction device, and then the fluid is slowly passed through the adsorption material at 0.1 m/s for adsorption. After the adsorption is completed, it is necessary to perform desorption treatment by means of heating, etc., so as to realize the recycling of the adsorption material.

Therefore, the current invention patents have the following problems:

1. It is generally necessary to make the adsorption material into corresponding structural parts, so the effective contact area between the adsorption member and the exhaust gas will be greatly reduced.

2. According to the principle of mass transfer, due to the existence of adsorption components, industrial waste gas will only produce adsorption on the surface of structural parts during the process of adsorption of industrial waste gas through structural parts. Therefore, the amount of industrial waste gas adsorbed is limited, and it cannot deal with high concentration industry exhaust.

3. In order to ensure the adsorption efficiency, the passage speed of the gas in the adsorption structure must be slow. Usually, the exhaust gas flow rate cannot exceed 0.1m/s, which significantly restricts the exhaust gas treatment efficiency.

4. When the gas passes through the structural parts, it is easy to cause wear on the surface of the activated carbon structural parts, and then the adsorption capacity will be significantly reduced with the increase of use time. At the same time, the ground activated carbon particles will be carried out with the fluid, causing secondary pollution.

5. The activated carbon structure after adsorption becomes a hazardous waste material. The storage, transportation, regeneration and harmless treatment of this hazardous waste material are very complicated and costly.

technical problem

In order to solve the above-mentioned technical problems, the purpose of this application is to provide a method for treating industrial waste gas, which not only has the function of porous materials to absorb industrial waste gas under the state of gas-solid flow, but also has the function of continuously crushing porous materials to realize It has the ability to treat industrial waste gas with high efficiency for a long time.

technical solution

In order to achieve the above-mentioned purpose, the application adopts the following technical solutions:

A method for treating industrial waste gas. In this method, industrial waste gas and porous materials are added to a mixer for adsorption. After completion, the gas-solid mixture enters a separator to separate the gas from the broken porous material that adsorbs industrial waste gas; it is characterized in that the mixed The mechanical treatment method is used in the device to make the porous material collide violently in the industrial waste gas, so that the industrial waste gas is adsorbed on the porous material, and the porous material adsorbing the industrial waste gas is simultaneously broken through mechanical treatment, and the industrial waste gas is further absorbed.

As a preferred method, the mechanical treatment methods described in this application include one or more combinations of crushing, grinding, crushing, impact, gas turbulence and high-speed fluid processing.

As a preferred mode, the initial maximum diameter of the porous material described in this application is less than 0.1mm; the porous material after crushing is 50nm-20 microns; the average particle size ratio before and after crushing is 1.5-100:1.

As a preferred mode, the porous material of the present application has a pore diameter of 1-500 nm, and a BET nitrogen adsorption specific surface area of 1 m ² /g to 350 m ² /g.

As a preferred mode, the porous material of the present application is selected from activated carbon, bamboo charcoal, charcoal, rice husk ash, straw ash, protein shale, diatom shale, opal, silicon dioxide, calcium carbonate, diatomite, attapulgite, zeolite , macroporous resin, silicon dioxide and/or calcium carbonate and aluminum oxide composite porous material.

As an embodiment, the porous material described in this application is selected from the composite porous material of silica and/or calcium carbonate and aluminum oxide (the detailed preparation method is disclosed in Chinese invention patent CN109608699A); preferably, the porous material includes The percentage by weight is 20%~95% silicon dioxide or calcium carbonate and 5%~80% aluminum oxide; more preferably, the silicon dioxide, calcium carbonate or aluminum oxide of the porous material are derived from silicon/calcium-containing materials , including: alunite, rice husk ash, straw ash, montmorillonite, talc, yellow clay, mica, wollastonite, bauxite, protein shale, diatomite, diatom shale, opal or Various combinations.

As a preferred mode, the porous material described in this application is vacuum-dried; the industrial waste gas is dried and compressed by a compressor.

Further, the present application also provides the method for obtaining a porous material for adsorbing industrial waste gas.

Further, the present application also provides the application of the porous material as a raw material for the production of rubber and plastic fillers, reinforcing additives or carbon black.

Further, the present application also provides the equipment of the method, the equipment includes a mixer and a separator connected to each other, the mixer is connected with an air inlet device and a particle adding device, and the separator is connected with a gas discharge device and a recovery device; industrial Waste gas and porous material are added to the mixer through the air inlet device and particle adding device respectively. In the mixer, mechanical treatment is used to make the porous material collide with the industrial waste gas violently, so that the industrial waste gas is adsorbed on the porous material, and through mechanical treatment The porous material that adsorbs industrial waste gas is further broken, and further adsorbs industrial waste gas; after completion, the gas-solid mixture enters the separator to separate the gas from the broken porous material that adsorbs industrial waste gas; the gas that has been adsorbed enters the gas discharge device to break the porous material Go to recovery unit or recycle to separator.

As a preferred mode, the mixer described in this application adopts one or more combinations of ball mill, vertical mill and jet mill; the separator includes: one of bag filter, cyclone separator, warehouse pump and exhaust fan or multiple combinations.

As a preferred mode, the device is provided with a thermal insulation layer at least on the outer surface of the mixer. Condensation on the side walls of the mixer, which can lead to particle agglomeration, is avoided. Certainly further, it is also possible to provide a heat insulation layer on the entire outer surface of the device of the present application.

As a preferred mode, the equipment of the present application also includes a feeding device, which mixes the porous material into the industrial waste gas; the mixer is connected to the feeding device, and the feeding device is connected to an airflow generating device, and the mixed gas containing the porous material is sent into the mixer.

As a preferred mode, the mixer described in this application adopts a multi-circulation connection mixing pipeline system, a mixing pipeline system premixing connector and a multi-section mixing tube, the first mixing tube is connected to the premixing connector, and the two premixing connectors are connected to each other. The upper part of the mixing joint is connected through the upper semi-arc connecting pipe, the lower parts of the two pre-mixing joints are connected through the lower semi-arc connecting pipe, and the last mixing pipe is connected with the separator.

As a preferred manner, a discharge valve is provided at the bottom of the lower semicircular connecting pipe described in the present application.

As a preferred mode, the feeding device described in the present application includes a feeding bin and a first sender, the feeding bin is connected to the first sender, the first sender is connected to the airflow generating device, and the feeding bin adds the porous material to the first sender , the first sender is connected to the premixing connector of the mixer through the air supply pipeline, and the air flow through the airflow generating device sends the porous material into the premixing connector; the premixing connector includes an industrial waste gas connecting pipe and a mixing The gas connecting pipe, the industrial waste gas connecting pipe is connected to the industrial waste gas conveying pipe, the mixed gas connecting pipe is connected to the air supply pipeline, and the outlet end of the industrial waste gas connecting pipe is located below the outlet end of the mixed gas connecting pipe.

As a preferred mode, the premixing connector described in this application is composed of a cylindrical body and a circular platform body, and the cylindrical body is located above the cylindrical body; one end of the industrial waste gas connecting pipe extends into the interior of the cylindrical body, The other end of the industrial waste gas connecting pipe is provided with a connecting flange for connecting the industrial waste gas conveying pipe; one end of the mixed gas connecting pipe extends into the inside of the circular platform cylinder, and the end is bent upward, and the other end is provided with a flange for A connecting flange for connecting the air supply pipeline; and a connecting flange for connecting the first mixing pipe is arranged on the upper part of the cylindrical body, and a discharge valve is arranged at the bottom of the cylindrical body.

As a preferred mode, a circulating ash bin is provided at the bottom of the separator described in this application, and the bottom of the circulating ash bin is connected to the second sender, and the second sender is connected to the air supply pipeline at the rear end of the first sender.

As a preferred method, the circulating ash bin described in this application is provided with an ash unloading valve and connected with a second compression pipeline system. Weight sensors are installed at the bottom of the circulating ash bin and the drug bin to monitor the weight of the powder in real time, and the air outlet is equipped with a TVOC And PM2.5 real-time air quality monitor, according to the change of internal powder weight and air quality detector, real-time control of the wind speed and dust cleaning pulse of the second compression pipeline system; the air supply pipeline of the second compression pipeline system A splitter can also be connected.

As a preferred mode, the separator and feeding bin described in this application are equipped with heating elements to maintain the temperature inside 100-150 degrees Celsius, so as to keep the powder in the purification system dry and highly adsorbable.

As a preferred manner, the cross-section of the inner channel of the mixing tube described in the present application changes in cross-sectional shape or size along with the direction of air flow.

As a preferred manner, the cross section of the mixing tube described in the present application is changed in diameter reduction and/or diameter expansion.

As a preferred mode, the interior of the mixing tube described in the present application is provided with a plurality of conical caps, the conical shape of the conical caps is set against the airflow direction, the diameter of the bottom surface is smaller than the diameter of the pipeline, and the intervals between the multiple conical caps are fixedly arranged for mixing on the bracket on the inner wall of the tube.

As a preferred mode, the mixer described in the present application adopts a jet mill, the airflow of the jet mill adopts compressed industrial waste gas, and the porous material is fed by industrial waste gas or compressed air.

As a preferred mode, the mixer described in the present application adopts a ball mill, and the porous material is fed into the ball mill along with the industrial waste gas; or, the porous material and the industrial waste gas are separately fed into the ball mill.

Beneficial effect

The present application has the following advantages due to the adoption of the above-mentioned technical solution:

1. The overall system is simple, does not include the preparation of adsorption structural parts, and does not require the desorption process after adsorption, which significantly reduces the operating cost of the system.

2. Through the synchronous crushing process, on the one hand, the effective contact area between the porous material and the industrial waste gas is greatly increased; on the other hand, the contact time between the porous material and the industrial waste gas is increased, thereby greatly improving the adsorption capacity of the industrial waste gas.

3. Through the synchronization of adsorption and crushing, the crushed porous materials continuously generate new contact surfaces, and the specific surface area continues to increase, which greatly improves the utilization of porous materials, and therefore improves the processing capacity of industrial waste gas.

4. This method does not need to process high-concentration industrial waste gas and hazardous waste materials through the combustion process, and realizes zero emission of carbon dioxide in the process of industrial waste gas treatment.

5. Porous materials that absorb industrial waste gas can be directly used as raw materials for rubber, plastic or carbon black production, without secondary pollution, and without high temperature desorption, and have a high energy utilization rate.

6. This method can handle industrial waste gas with high flow rate and large flow rate, the speed is greater than 2m/s, and the flow rate is greater than 2000m³/h.

7. The method of the present application can be widely used in chemical factories, electronics factories, printing factories, painting workshops, painting factories, food factories, rubber factories, paint factories, petrochemical industries and other places where dust, peculiar smell, smoke and dust are generated.

Description of drawings

Fig. 1 is a schematic flow chart of the method of the present invention.

Fig. 2 is a schematic diagram of an embodiment of the present invention.

Fig. 3 is a schematic diagram of an embodiment of the present invention.

Fig. 4 is a schematic diagram of an embodiment of the present invention.

Fig. 5 is a schematic diagram of an embodiment of the present invention.

Fig. 6 is a schematic diagram of an embodiment of the present invention.

Fig. 7 is a photograph of an engineering prototype of an embodiment of the present invention.

Fig. 8 is a schematic diagram of an embodiment of the present invention.

Figure 9 is a schematic structural view of the mixer.

Figure 10 and Figure 11 are schematic structural views of the premixed connector.

Figure 12 is a comparison chart before and after industrial waste gas treatment.

Embodiments of the present invention

The specific implementation manner of the present application will be described in detail below in conjunction with the accompanying drawings.

实施例Example 11

As shown in Figure 2, an adsorption separation device without synchronous crushing process, the device includes: exhaust gas inlet 1, mixing pipeline system 2, bag filter 3, exhaust fan 4, warehouse pump 5, air delivery device 6, Seal recovery bin 7, feeding device 8. The feeding device 8 feeds the material into the air conveying device 6 and is connected to the mixing pipeline system 2 . As shown in Figure 9, the mixing pipeline system 2 includes a premixing connector 21 and a multi-section mixing tube 22, the first mixing tube 22 is connected to the premixing connector 21, and the upper parts of the two premixing connectors 21 pass through the upper semicircle The arc-shaped connecting pipes 23 are connected, the lower parts of the two pre-mixing connectors 21 are connected through the lower semi-circular arc-shaped connecting pipes 23, and the last mixing pipe 22 is connected with the bag filter 3.

The exhaust gas inlet 1 is connected to the mixing pipeline system 2, and the industrial waste gas and adsorption materials are passed into the mixing pipeline system 2 through the fan. After the industrial waste gas passes through a separate pipeline, it is connected to the bag filter 3 for dust removal and separation. The clean gas is pumped out of the bag filter 3 under the action of the exhaust fan 4 and enters the atmosphere. The adsorbent material after dedusting and separation is pumped from the bag filter 3 into the sealed recovery bin 7 under the action of the bin pump 5 . Part of the adsorption material in the sealed recovery bin 7 is connected to the exhaust gas inlet 1 via the airflow conveying device 6 for cyclic adsorption; a part of the adsorption material is put into the production of the rubber and plastic industry to form a synergy in the production process.

实施例Example 22

As shown in Figure 3, an adsorption and separation equipment for variable cross-section tubular synchronous crushing process, the device includes: waste gas inlet 1, mixing pipeline system 2, bag filter 3, exhaust fan 4, warehouse pump 5, air flow conveying device 6. Sealed recovery bin 7, feeding device 8. The feeding device 8 feeds the material into the air conveying device 6 and is connected to the variable mixing pipeline system 2 . The waste gas inlet 1 is connected to the mixing pipeline system 2, and the industrial waste gas and the adsorption material are passed into the mixing pipeline system 2 through the fan. As shown in Figure 9, the mixing pipeline system includes a premixing connector 21 and a multi-section mixing tube 22, the first mixing tube 22 is connected to the premixing connector 21, and the upper parts of the two premixing connectors 21 pass through the upper half arc The bottom of the two premixing connectors 21 are connected through the lower semicircular connecting pipe 23, and the last mixing pipe 22 is connected with the bag filter 3. As shown in FIG. 3 , the cross-section of the mixing tube 22 adopts continuous diameter reduction and diameter expansion.

The industrial waste gas passes through the variable cross-section pipeline, and after being crushed and adsorbed in it, it is connected to the bag filter 3 for dust removal and separation. The separated clean gas is pumped out of the bag filter 3 under the action of the exhaust fan 4 and enters the atmosphere. The adsorbent material after dedusting and separation is pumped from the bag filter 3 into the sealed recovery bin 7 under the action of the bin pump 5 . Part of the adsorption material in the sealed recovery bin 7 is connected to the exhaust gas inlet 1 via the airflow conveying device 6 for cyclic adsorption; a part of the adsorption material is put into the production of the rubber and plastic industry to form a synergy in the production process.

实施例Example 33

As shown in Figure 4, an adsorption and separation equipment for shield synchronous crushing process, the device includes: exhaust gas inlet 1, mixing pipeline system 2, bag filter 3, exhaust fan 4, warehouse pump 5, air flow conveying device 6, Sealed storage bin 7, feeding device 8, conical cap 9. The feeding device 8 feeds the material into the air conveying device 6 and is connected to the mixing pipeline system 2 . The waste gas inlet 1 is connected to the mixing pipeline system 2, and the industrial waste gas and the adsorption material are passed into the mixing pipeline system 2 through the fan. As shown in Figure 9, the mixing pipeline system 2 includes a premixing connector 21 and a multi-section mixing tube 22, the first mixing tube 22 is connected to the premixing connector 21, and the upper parts of the two premixing connectors 21 pass through the upper semicircle The arc-shaped connecting pipes 23 are connected, the lower parts of the two pre-mixing connectors 21 are connected through the lower semi-circular arc-shaped connecting pipes 23, and the last mixing pipe 22 is connected with the bag filter 3. As shown in Figure 4, the inside of the mixing tube 22 is provided with a plurality of conical caps 9, the conical shape of the conical caps 9 is set against the air flow direction, the diameter of the bottom surface is smaller than the pipe diameter, and between the plurality of conical caps 9 The spacers are fixedly arranged on the fixed frame of the inner wall of the mixing tube 22 .

The industrial waste gas passes through the conical cap 9 and collides with it, and is absorbed in the mixing pipeline system 2 . Afterwards, it is connected to the bag filter 3 for dust removal and separation. The separated clean gas is pumped out of the bag filter 3 under the action of the exhaust fan 4 and enters the atmosphere. The adsorbent material after dedusting and separation is pumped from the bag filter 3 into the sealed storage bin 7 under the action of the bin pump 5 . Part of the adsorption material in the sealed storage bin 7 is connected to the waste gas inlet 1 via the airflow conveying device 6 for cyclic adsorption; a part of the adsorption material is put into the production of the rubber and plastic industry to form a synergy in the production process.

实施例Example 44

As shown in Figure 5, an adsorption and separation equipment for jet mill crushing process, said equipment includes: waste gas inlet 1, jet mill 2, bag filter 3, exhaust fan 4, warehouse pump 5, air conveying device 6, sealing Storage bin 7, feeding device 8. The feeding device 8 feeds material into the airflow conveying device 6 and is connected with the airflow mill 8 together with the waste gas inlet 1 . The industrial waste gas and the porous material are collided and crushed at high speed under the action of the jet mill and adsorbed at the same time. After that, it enters into the bag filter 3 for dust removal and separation, and the separated clean gas is drawn out of the bag filter 3 under the action of the exhaust fan 4 and enters the atmosphere. The adsorbent material after dedusting and separation is pumped from the bag filter 3 into the sealed storage bin 7 under the action of the bin pump 5 . Part of the adsorption material in the sealed storage bin 7 is connected to the waste gas inlet 1 via the airflow conveying device 6 for cyclic adsorption; a part of the adsorption material is put into the production of the rubber and plastic industry to form a synergy in the production process.

实施例Example 55

As shown in Figure 6, a kind of adsorption separation equipment of ball mill synchronous crushing process, said equipment includes: waste gas inlet 1, ball mill 2, bag filter 3, exhaust fan 4, warehouse pump 5, air flow conveying device 6, sealed recovery warehouse 7. Feeding device 8; the feeding device 8 puts materials into the air conveying device 6 and connects to the ball mill 2. The waste gas inlet 1 is connected to the ball mill 2. The industrial waste gas in the ball mill passes through violently broken and adsorbed. Afterwards, it is connected to the bag filter 3 for dust removal and separation, and the separated clean gas is drawn out of the bag filter 3 under the action of the exhaust fan 4 and enters the atmosphere. The adsorbent material after dedusting and separation is pumped from the bag filter 3 into the sealed recovery bin 7 under the action of the bin pump 5 . Part of the adsorption material in the sealed recovery bin 7 is connected to the exhaust gas inlet 1 via the airflow conveying device 6 for cyclic adsorption; a part of the adsorption material is put into the production of the rubber and plastic industry to form a synergy in the production process.

实施例Example 66

As shown in Figure 7, it is a principle verification equipment for improving the adsorption of industrial waste gas by porous materials through a synchronous crushing process. This equipment is used to absorb industrial waste gas generated during the tire production process of tire manufacturers.

As shown in FIG. 8 , the device includes an exhaust gas inlet 1 , a mixer 2 , a separator 3 and a feeding device 8 . The mixer 2 is connected to the feeding device 8, and the feeding device 8 is connected to an airflow conveying device 6, and the adsorbent is mixed with air through the airflow conveying device 6, and the airflow conveying device 6 is the compressed air flow rate of the first compressed air system in the range of 2.5~ ^3m3 /min. The feeding device 8 mixes the adsorption material into the tail gas; the adsorption material is selected from diatom mineral powder. The airflow conveying device 6 sends the mixed gas containing the adsorption material into the mixer 2 through the airflow, and the separator 3 is connected to the mixer 2. The separator 3 is a bag filter, and the bag filter absorbs the adsorption material of VOC Separated from the treated tail gas, the air outlet of the separator 3 is connected to the smoke exhaust device 5 to discharge the separated tail gas.

As shown in Figure 9, the mixer 2 is a multi-circulation connection mixing piping system, the multi-circulation connection mixing piping system includes a pre-mixing connector 21 and 5 section mixing pipes 22, the first mixing pipe 22 is connected to The premixing connectors 21 are connected, the upper parts of the two premixing connectors 21 are connected through the upper semicircular connecting pipe 23, and the lower parts of the two premixing connectors 21 are connected through the lower semicircular connecting pipe 23, the fifth The root mixing pipe 22 is connected with the separator 3; the bottom of the lower semicircular connecting pipe 23 is provided with a discharge valve 24.

As shown in Figure 8, the feeding device 8 includes a feeding bin 81 and a first sender 82, the described feeding bin 81 is connected to the first sender 82, and the first sender 82 is connected to the air flow conveying device 6, and the feeding bin 81 will absorb the material A first sender 82 is added, and the first sender 82 is connected to the premix connection head 21 of the mixer 2 through the air supply pipeline, and the airflow through the airflow conveying device 6 sends the adsorbent material into the premix connection head 21 .

As shown in Figures 10 and 11, the premixed connector 21 includes an exhaust gas connecting pipe 211 and a mixed gas connecting pipe 212, the exhaust gas connecting pipe 211 is connected to the exhaust gas delivery pipe, and the mixed gas connecting pipe 212 is connected to the air supply pipeline, And the outlet end of the tail gas connecting pipe 211 is located below the outlet end of the mixed gas connecting pipe 212 . The premixing connector 21 is composed of a cylindrical body 213 and a cylindrical body 214, the cylindrical body 214 is located above the cylindrical body 213; one end of the exhaust gas connecting pipe 211 extends into the interior of the cylindrical body 213, The other end of the exhaust gas connecting pipe 211 is provided with a connecting flange for connecting the exhaust gas conveying pipe; one end of the mixed gas connecting pipe 212 extends into the inside of the round table cylinder 214, and the end is bent upwards, and the other end is provided with a useful A connecting flange for connecting the air supply pipeline; and a connecting flange for connecting the first mixing pipe 22 is arranged on the upper part of the cylindrical body 214, and a discharge valve is arranged at the bottom of the cylindrical body 213.

As shown in Figure 8, the bottom of the separator 3 is provided with a warehouse pump 5, the bottom of the warehouse pump 5 is connected to the sealed storage bin 7, and the sealed storage bin 7 is connected to the second transmitter 83, and the second transmitter 83 is connected to the first In the air supply pipeline at the rear end of the transmitter 82; the sealed storage bin 7 is provided with an ash unloading valve 71, and is connected with a second compression pipeline system 61, and the second compression pipeline system 61 compresses the air flow rate range of 2m ³ /min, sealed storage bin 7 and the bottom of the drug bin are equipped with weight sensors to monitor the powder weight in real time, and the air outlet is equipped with TVOC and PM2.5 real-time air quality monitors, which are controlled in real time according to the internal powder weight changes and air quality detectors The wind speed and dust removal pulse of the second compression pipeline system 61; the air supply pipeline of the second compression pipeline system 61 can also be connected to the separator 3; the separator 3 and the feeding bin 81 are provided with heating The element maintains its internal temperature of 100-150 degrees Celsius to keep the powder in the purification system dry and highly absorbent.

Let's take the industrial waste gas treatment of a rubber production enterprise as an example. The equipment used is as shown above. VOCs mixed gas is introduced. The concentration of three substances in the gas is 100mg/m3 of toluene, 140mg/ ^m3 of ethyl acetate and 110mg/ ^m3 ^of acetone. The 50 nm carbon black is 100 mg/m ³ , the total concentration of organic matter (TVOC) is 350 mg/m ³ , the total concentration of inorganic matter is 100 mg/m ³ , and the total flow rate of exhaust gas is 2 m ³ /h. The technical performance is shown in the table below. Comparison of industrial waste gas treatment before and after 120 minutes to start putting diatom mineral powder into the chemical warehouse, and the results are shown in Figure 12.

实施例Example 77

As shown in Example 2. The industrial flue gas flow rate to be treated is 2200m³/h, the total pressure is 5000Pa, the length of the mixed flow tube is 12m, and the adsorption material is inorganic porous material. In this embodiment, silica lattice powder is used as an inorganic porous material, and the particle size (D50) of the particle is 7.3 μm. The concentration of industrial flue gas at the air inlet is 15-20mg/m ³ , and the solid particle PM2.5 in the exhaust gas is 560mg/m ³ .

The following takes the exhaust gas treatment of a rubber production enterprise as an example. The industrial flue gas flow rate to be treated is 2200m³/h, the total pressure is 5000Pa, the length of the mixed flow pipe is 12m, and the adsorption material is an inorganic porous material. The particle size (D50) is 7.3 μm. The concentration of industrial flue gas at the air inlet is 15-20mg/m3, and the solid particle PM2.5 in the exhaust gas is 560mg/ ^m3 .

The equipment has been running stably for 130 hours, and the exhaust gas adsorption efficiency is stable above 85%, and the PM2.5 adsorption efficiency is 100%. The VOC concentration detection data at the import and export of the system are as follows:

After running, the particle size (D50) of the porous material changed from 7.3 μm to 3.9 μm, realizing the simultaneous function of adsorption and crushing.

The porous material after adsorption (the porous material in this example is silicon lattice powder material, which is a functional material normally used in the tire industry at present, mainly used to reduce tire heat generation), can be directly used in tire rubber material formula Among them, the mechanical and thermodynamic properties of rubber materials are improved.

The comparison of thermodynamic properties of porous materials in rubber before and after adsorption is shown in the table below:

It can be seen from the table data that the elongation at break of the porous material after absorbing the flue gas increases, the fracture stress increases, the permanent deformation decreases, and the hysteresis loss decreases. The mechanical and thermodynamic properties are greatly improved, so the performance is better than that of unadsorbed porous materials.

实施例Example 77

Integrating the devices described in Examples 1-5, record respectively in the devices of Embodiment 1-5: the inlet velocity of the waste gas inlet, the inlet particle size, the inlet concentration and the outlet concentration and the outlet particle size of the exhaust fan, and obtain the following table :

It can be seen from the test data in the table that after using the method invented by this method, the particles are crushed synchronously during the adsorption process, and the crushing effect is remarkable. The data tests of several examples show that the adsorption efficiency is closely related to the inlet speed, particle crushing degree and adsorption time. Each example can achieve 100% adsorption by setting relevant parameters and adjusting the size of the equipment.

The foregoing is a description of the embodiments of the present invention, and through the above descriptions of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these examples will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel points disclosed herein.

Claims

A method for treating industrial waste gas. In this method, industrial waste gas and porous materials are added to a mixer for adsorption. After completion, the gas-solid mixture enters a separator to separate the gas from the broken porous material that adsorbs industrial waste gas; it is characterized in that the mixed The industrial waste gas is adsorbed on the porous material by means of mechanical treatment in the device, and the porous material adsorbing the industrial waste gas is violently collided through mechanical treatment, and the porous material is broken simultaneously to further absorb the industrial waste gas.
The method for treating industrial waste gas according to claim 1, wherein the mechanical treatment method includes one or more combinations of crushing, grinding, crushing, impact, gas turbulence and high-speed fluid processing.
A method for treating industrial waste gas according to claim 1, characterized in that the initial maximum particle size of the porous material is less than 0.1 mm; the particle size of the porous material after crushing is 100 nm-20 μm; the average particle size ratio before and after crushing is 1.5-100 : 1.
The method for treating industrial waste gas according to claim 1, characterized in that the porous material has a pore diameter of 1-500 nm, and a BET nitrogen adsorption specific surface area of 1 m 2 /g to 350 m 2 /g.
A method for treating industrial waste gas according to claim 1, wherein the porous material is selected from activated carbon, bamboo charcoal, charcoal, rice husk ash, straw ash, protein shale, diatom shale, opal, silicon dioxide, One or more of calcium carbonate, diatomite, attapulgite, zeolite, macroporous resin, silicon dioxide and/or composite porous materials of calcium carbonate and aluminum oxide.
A method for treating industrial waste gas according to claim 1, characterized in that the porous material is selected from composite porous materials of silicon dioxide and/or calcium carbonate and aluminum oxide.
The method for treating industrial waste gas according to claim 6, wherein the porous material comprises 20%-95% by weight of silicon dioxide or calcium carbonate and 5%-80% of aluminum oxide.
A method for treating industrial waste gas according to claim 7, characterized in that the silicon dioxide, calcium carbonate or aluminum oxide of the porous material is derived from silicon/calcium-containing materials, including: alunite, rice husk ash, straw One or more combinations of ash, montmorillonite, talc, yellow clay, mica, wollastonite, bauxite, protein shale, diatomite, diatom shale, and opal.
The method for treating industrial waste gas according to claim 1, wherein the porous material is vacuum-dried; the industrial waste gas is dried and compressed by a compressor.
According to the method described in any one of claims 1-9, a porous material for adsorbing industrial waste gas is obtained.
The application of the porous material according to claim 10 as a raw material for rubber and plastic fillers, reinforcing additives or carbon black production.
According to the equipment of the method described in any one of claims 1-9, it is characterized in that the equipment includes a mixer and a separator connected to each other, the mixer is connected with an air inlet device and a particle adding device, and the separator is connected with a Gas discharge device and recovery device; industrial waste gas and porous materials are added to the mixer through the intake device and particle adding device respectively, and mechanical treatment is used in the mixer to make the porous material collide violently in the industrial waste gas, so that the industrial waste gas It is adsorbed on porous materials, and through mechanical treatment, the porous materials adsorbing industrial waste gas are further broken, and the industrial waste gas is further adsorbed; after completion, the gas-solid mixture enters the separator to separate the gas from the broken porous materials adsorbing industrial waste gas; the adsorption is completed The gas enters the gas discharge device.
The equipment according to claim 12, characterized in that the broken and adsorbed porous material circulates into the mixer for full adsorption and further crushing, and the adsorbed and saturated porous material enters the recovery device.
The equipment according to claim 12, characterized in that, the mixer adopts one or more combinations of ball mill, vertical mill and jet mill; the separator includes: bag filter, cyclone separator, warehouse pump, exhaust One or more combinations of fans.
Device according to claim 12, characterized in that it is provided with a thermal insulation layer at least on the outer surface of the mixer.
The equipment according to claim 12, characterized in that the mixer adopts a multi-circulation connection mixing piping system, the mixing piping system includes a pre-mixing connector (21) and a multi-section mixing pipe (22), the first mixing pipe (22) is connected with the premix connectors (21), the upper parts of the two premix connectors (21) are connected by the upper semicircular connecting pipe (23), and the lower parts of the two premix connectors (21) are connected by The lower semicircular connecting pipe (23) is connected, and the last mixing pipe (22) is connected with the separator (3).
The device according to claim 16, characterized in that a discharge valve (24) is provided at the bottom of the lower semicircular connecting pipe (23).
The equipment according to claim 16, characterized in that the equipment also includes a feeding device, the feeding device (8) mixes the porous material into the industrial waste gas; the mixer is connected to the feeding device (8), and the feeding device (8) A gas flow generator is connected to send the mixed gas containing the porous material into the mixer through the gas flow;

Preferably, the feeding device (8) includes a feeding bin (81) and a first transmitter (82), the feeding bin (81) is connected to the first transmitter (82), and the first transmitter (82) Connect the air flow conveying device (6), feed the porous material into the first sender (82) from the feeding bin (81), and the first sender (82) is connected to the premixing connector of the mixer (2) through the air supply pipeline ( 21), the airflow through the airflow conveying device (6) sends the porous material into the premixed connector (21); the premixed connector (21) includes an industrial waste gas connecting pipe (211) and a mixed gas connecting pipe (212 ), the industrial waste gas connecting pipe (211) is connected to the industrial waste gas delivery pipe, the mixed gas connecting pipe (212) is connected to the air supply pipeline, and the outlet end of the industrial waste gas connecting pipe (211) is located at the mixed gas connecting pipe (212 ) below the outlet port.
The equipment according to claim 18, characterized in that, the pre-mixing connector (21) is composed of a cylindrical body (213) and a cylindrical body (214), and the cylindrical body (214) is located on the cylindrical body ( 213); one end of the industrial waste gas connecting pipe (211) extends into the interior of the cylinder (213), and the other end of the industrial waste gas connecting pipe (211) is provided with a connecting flange for connecting the industrial waste gas delivery pipe disk; one end of the mixed gas connecting pipe (212) extends into the inside of the cylindrical body (214), and the end is bent upwards, and the other end is provided with a connecting flange for connecting the air supply pipeline; and The upper part of the cylindrical body (214) is provided with a connecting flange for connecting the first mixing pipe (22), and the bottom of the cylindrical body (213) is provided with a discharge valve.
The device according to claim 16, characterized in that, the bottom of the separator (3) is provided with a circulating ash bin (6), and the bottom of the circulating ash bin (6) is connected to the second transmitter (83), and the second sending The transmitter (83) is connected to the air supply pipeline at the rear end of the first transmitter (82).
The equipment according to claim 16, characterized in that, the ash unloading valve (61) is set on the circulating ash bin (6), and is connected with the second compression pipeline system (61), the circulating ash bin (6 ) and the bottom of the drug warehouse are equipped with a weight sensor to monitor the powder weight in real time. The air outlet is equipped with a TVOC and PM2.5 real-time air quality monitor. According to the internal powder weight change and the air quality detector, the second compression pipeline system (61 ) wind speed and dust cleaning pulse; the air supply pipeline of the second compression pipeline system (61) can also be connected to the separator (3).
The equipment according to claim 16, characterized in that, the separator (3) and the feeding bin (81) are equipped with heating elements to maintain the temperature inside 100-150 degrees Celsius, so that the powder in the purification system can be kept dry and at a high temperature. Adsorptive.
The device according to any one of claims 16-22, characterized in that, the cross-section of the inner channel of the mixing tube (22) changes in cross-sectional shape or size along with the flow direction.
The device according to claim 23, characterized in that, the cross-section of the mixing tube (22) is changed in diameter reduction and/or diameter expansion.
The equipment according to any one of claims 16-22, characterized in that the inside of the mixing tube (22) is provided with a plurality of conical caps, the conical shape of the conical caps is set against the airflow direction, and the bottom surface The diameter is smaller than that of the pipeline, and a plurality of conical caps are arranged at intervals, respectively fixed on the fixed frame on the inner wall of the mixing tube (22).
The equipment according to any one of claims 12-15, characterized in that the mixer is a jet mill, the air flow of the jet mill is compressed industrial waste gas, and the porous material is fed by industrial waste gas or compressed air.
The equipment according to any one of claims 12-15, characterized in that the mixer is a ball mill, and the porous material is added to the ball mill along with the industrial waste gas; or, the porous material and the industrial waste gas are separately fed into the ball mill.