1452 results about "Acid gas" patented technology

A process system and process method for treating hydrogen sulfide-containing acid gas. The process system comprises a sulfur recovery unit, a tail gas treatment unit having an acid gas concentration function, and a flue gas alkaline scrubbing unit. The method comprises: subjecting sulfur-containing tail gas to concentration treatment by means of an absorption column (1) of the tail gas treatment unit, and then introducing same into the sulfur recovery unit to undergo a Claus reaction for separation, so as to obtain sulfur and sulfur recovery tail gas; introducing the sulfur recovery tail gas into the tail gas treatment unit, successively carrying out combustion and hydrotreating, and introducing the obtained gas into the absorption column (1) of the tail gas treatment unit; and in the tail gas treatment unit, introducing gas absorbed by the absorption column (1) into the flue gas alkaline scrubbing unit, and successively carrying out incineration and alkaline scrubbing, so as to discharge desulfurized gas. The content of SO2 in the tail gas treated by the process system is ≤50 mg / Nm3, and the requirements for full-period standard reaching of sulfur dioxide emission of tail gas during startup, shutdown and normal operations can be satisfied.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

Provided are an acidic gas-absorbing liquid and an acidic gas reduction method that can reduce the energy required for recovering acidic gas from gas, even if the gas contains moisture, and that has little impact on solvent loss. The acidic gas-absorbing liquid according to the present invention reversibly absorbs and desorbs carbon dioxide, and contains an oxygen-containing polymer and an amine compound. The oxygen-containing polymer has at least one group selected from the group consisting of an oxyalkylene group, a carbonate group, and an ester group, and has a number average molecular weight of 250-20000, a boiling point of 200°C or higher, and a solubility parameter of 15.0 (MPa)1 / 2 or more and less than 19.5 (MPa)1 / 2. The amine compound has a solubility parameter of 13.0-25.5 (MPa)1 / 2.

The invention belongs to the field of environment-friendly gas purification and energy conservation, and discloses a desulfurization and decarbonization method and system. The desulfurization and decarbonization system comprises a flue gas absorption system and an amine liquid regeneration system, the flue gas regeneration system comprises an absorption tower, a high-temperature rich and lean liquid heat exchanger, a low-temperature rich and lean liquid heat exchanger and a heat pump system; the amine liquid regeneration system comprises a regeneration tower, a thermal coupling reboiler, a high-pressure reflux tank, a reboiler, a low-pressure flash tank, a barren liquor low-temperature cooler and a steam flash tank. The desulfurization and decarbonization method comprises the following steps: in an absorption tower, performing countercurrent contact on amine liquid and raw material gas, and absorbing acid gas in the raw material gas to generate an amino salt compound, so as to obtain amine-rich liquid; the amine-rich liquid enters a regeneration low-pressure tower and a regeneration high-pressure tower, the amino salt compound is regenerated to release acid gas to generate amine liquid, and the amine liquid returns to the absorption tower. By utilizing a high-low pressure regenerative thermal coupling technology and a heat pump technology, the energy consumption of the system is effectively reduced, the overall absorption efficiency is improved, and the equipment investment and site arrangement are saved.

The invention relates to the technical field of CO2 capture and separation, and particularly discloses an anhydrous absorbent with a self-extraction function as well as application and a recovery method. The anhydrous absorbent is synergistically composed of a mixed amine absorption enhancer with specific composition and a hydrophobic organic solvent, wherein the mixed amine absorption enhancer comprises primary amine, secondary amine and tertiary amine. The mixed amine absorption accelerant combines the advantages of high reaction activity of primary amine, low regeneration heat of secondary amine and high absorption capacity and strong hydrophobicity of tertiary amine, so that the anhydrous absorbent shows excellent self-extraction capacity in the adsorption and desorption processes of acid gas, particularly, the anhydrous absorbent after absorbing the acid gas forms a less-water CO2 rich phase, and the CO2 rich phase has excellent self-extraction capacity. And due to the characteristic of less water, sensible heat and latent heat of vaporization required by a rich phase in a CO2 desorption stage are remarkably reduced, so that the problem that the energy consumption is too high in the regeneration process of the existing water-based absorbent is effectively solved.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation stages are integrated with high-pressure and low-pressure compressors with the low-pressure compressor operating in a defined pressure range. The combined system provides for efficient contaminant removal from raw biogas to generate high-purity methane products with reduced membrane area and compression energy consumption.

A method for removing acidic gases from a post combustion process stream, the method comprising the steps of: receiving the post combustion process stream into hollow fibers of at least one MBC cell, each hollow fiber gas permeable, liquid impermeable; passing a lean solvent in contact with an external surface of said hollow fibers; exchanging said acidic gas into the solvent through the hollow fiber; venting an acidic gas lean stream; exiting an acidic gas rich solvent.

The present application discloses a liquid flow battery circulation recovery system and recovery method, which belongs to the field of liquid flow battery technology. The recovery system includes a positive electrode storage tank, which is filled with a positive electrode electrolyte. The positive electrode electrolyte contains reducing ions and active ions. The reducing ions can react with the active ions to reduce the valence of the active ions and produce a first oxidizing gas; a catalytic reaction device, which is filled with a catalyst, and the catalytic reaction device can receive the first oxidizing gas to oxidize and fix the catalyst; a negative electrode storage tank, which is filled with a negative electrode electrolyte. The negative electrode electrolyte undergoes a side reaction to produce a first reducing gas; the catalytic reaction device receives the first reducing gas, and the first reducing gas is used to reduce the oxidized catalyst, and the generated acidic gas can return to the negative electrode storage tank. The present application can maintain the valence balance of the positive and negative electrode solutions without adding a recovery agent to the positive electrode solution, avoids contamination of the electrolyte, and realizes long-life stable operation of the liquid flow battery.

An improved process for removing acid gases from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, provides for efficient H2S removal combined with carbon dioxide removal. The biogas is treated in a biological hydrogen sulfide removal system integrated with a membrane gas separation system. The combined system provides for efficient acid gas removal while simultaneously limiting oxygen carryover into the treated product stream by beneficially utilizing oxygen in the biological desulfurization system.

The invention discloses a mixed utilization method of coal chemical gasification black water high-temperature flash steam, and relates to the technical field of black water flash evaporation. In the high-pressure section flash steam heat exchange process, the heat transfer temperature difference and the flow speed are dynamically adjusted through Bayesian optimization, the heat utilization rate of the high-temperature flash steam is maximized, the heat exchange efficiency is improved, and meanwhile in the catalytic reaction stage, the heat transfer temperature difference and the flow speed are dynamically adjusted through Bayesian optimization; heat input and reaction temperature of the catalytic device are regulated in real time based on the outlet temperature of the heat exchanger, so that heat energy distribution is more efficient, and heat waste is avoided; meanwhile, graded flash evaporation is carried out, steam is divided into high-pressure section heat exchange, medium-pressure section catalytic treatment and low-pressure section condensation recovery, and multi-level gradient utilization of energy is achieved; meanwhile, real-time prediction is carried out based on gas components and catalytic device loads, the feeding amount of the adsorbent is dynamically adjusted, resource waste is avoided, meanwhile, the conversion rate of acid gas is increased, and after low-pressure-section tail gas is subjected to condensation treatment, the condensate recovery rate is remarkably increased.

The invention relates to the technical field of adsorbents, and discloses a moisture-resistant carbon dioxide trapping adsorbent, and a preparation method thereof comprises the following steps: S1, blending oxalic acid or oxalate or squaric acid and a zinc source in a reaction system to obtain a mixture I; s2, dissolving an organic ligand in a solvent to obtain a mixture II; s3, the mixture I and the mixture II are subjected to a reaction and post-treatment, and the adsorbent is obtained. According to the prepared adsorbent, a pore structure is formed in situ in the preparation process, the specific surface area is large, the porosity is large, the structure can be kept stable in the presence of water and steam, and the adsorbent is stable to wet acid gas.

The invention provides a Claus tail gas hydrogenation catalyst as well as a preparation method and application thereof, and belongs to the technical field of sulfur recovery, the Claus tail gas hydrogenation catalyst comprises an aluminum-titanium-silicon-based composite carrier and active components, the aluminum-titanium-silicon-based composite carrier comprises Al2O3, nano TiO2 and SiO2, the aluminum-titanium-silicon-based composite carrier further comprises an antioxidant, and the active components comprise an active component and an antioxidant. Preparing an aluminum-titanium-silicon-based composite carrier by adopting a mixing and kneading mode; wherein the active components comprise oxides of VIII group metals, oxides of VIB group metals and oxides of rare earth metals, the rare earth metals are mixed and kneaded in the form of oxides and added into the composite carrier, and cobalt and molybdenum are loaded on the carrier by a dipping method. The catalyst has the characteristics of high low-temperature activity and strong oxidation resistance, has the function of catalyzing CO conversion, is suitable for being widely applied to hydrogenation reactors of sulfur recovery devices in the industries of petroleum refining, coal chemical industry and the like, and is particularly suitable for treating acid gas with relatively high CO2 content.

Provided are an acidic gas-absorbing liquid and an acidic gas reduction method that can reduce the energy required for recovering acidic gas from gas and that has little impact on solvent loss. The acidic gas-absorbing liquid according to the present invention reversibly absorbs and desorbs carbon dioxide, and contains an oxygen-containing polymer and an amine compound. The oxygen-containing polymer has at least one group selected from the group consisting of an oxyalkylene group, a carbonate group, and an ester group, and has a number average molecular weight of 300-4000, a boiling point of 200°C or higher, and a solubility parameter of 19.5-26.0 (MPa)1 / 2. The difference between the solubility parameter of the oxygen-containing polymer and the solubility parameter of the amine compound is 4.0-6.3 (MPa)1 / 2.

The invention relates to the technical field of industrial waste gas treatment, and discloses an acid gas treatment device and method for synthesis ammonia production, the acid gas treatment device for synthesis ammonia production comprises an absorption tower, a spraying system and a filler layer, the spraying system and the filler layer are installed in the absorption tower, and a receiving disc is arranged below the filler layer; the receiving disc comprises a plurality of annular plates which are vertically and coaxially distributed, the diameters of the annular plates are gradually reduced from top to bottom, the bottom of the annular plate on the lowermost side is fixedly connected with a drainage ring, the outer wall of the lower portion of the drainage ring is sleeved with a collecting cylinder, the inner wall of the drainage ring is fixedly connected with a flow slowing cylinder, and the lower portion of the flow slowing cylinder extends into the collecting cylinder. The solvent flows on the annular plate, and after the flow speed of the solvent is slowed down through the flow slowing cylinder, the solvent and impurities form a falling speed difference in the collecting cylinder, so that the impurities can effectively precipitate at the bottom in the collecting cylinder and are prevented from flowing to a filtering system of the recycling box along with the solvent, the burden of the filtering system is relieved, and the recycling efficiency of the solvent is improved.

The invention belongs to the technical field of sulfur recovery, and particularly relates to a treatment method and a treatment device for ultralow-concentration acid gas, which are applicable to treatment of acid gas with H2S less than 1% in industries such as coal chemical industry and the like. According to the treatment method of the ultralow-concentration acid gas, the ultralow-concentration acid gas and the Claus hydrogenation tail gas are mixed and then introduced into the quench tower to be treated, on one hand, the temperature of the hydrogenation tail gas can be reduced, on the other hand, the effect of injecting ammonia into quench water can be achieved, sulfur resources are fully recycled, and meanwhile the energy consumption is reduced. And dual treatment of H2S and NH3 in the ultralow-concentration acid gas is realized.

The invention relates to the technical field of tail gas treatment, in particular to a hydrogen fluoride preparation tailing acid gas adsorption device and an adsorption method.The hydrogen fluoride preparation tailing acid gas adsorption device comprises a treatment box, a reaction cavity and an adsorption cavity are formed in the treatment box, and a reaction barrel is fixedly installed in the reaction cavity; a stirring shaft is rotatably mounted on the inner wall of the top of the adsorption cavity, a driving motor is arranged at the top of the treatment box, an output shaft of the driving motor extends into the treatment box and is connected with the top end of the stirring shaft, and the bottom end of the stirring shaft extends into the reaction barrel and is fixedly provided with a rotating plate; a rectangular cavity is formed in the rotating plate, an L-shaped hole is formed in the inner wall of the side portion of the rectangular cavity, and a first L-shaped connecting pipe is fixedly arranged in the L-shaped hole. Waste gas can be uniformly guided into all positions in the reaction barrel, the uniform gas guiding function is achieved, a neutralizing agent can make full contact with the waste gas conveniently, and the waste gas treatment function is achieved.

The utility model provides a hydrogenation reaction system for producing sulfur by reducing acid gas regenerated by activated carbon, which comprises an acid gas pretreatment system, a first-stage hydrogenation system, a second-stage hydrogenation system, a tail gas treatment system and a liquid sulfur tank, the acid gas generated by regeneration of desulfurized activated carbon is pretreated and then is subjected to hydrogenation reduction to produce sulfur, the hydrogenation is divided into two stages, wherein the primary hydrogenation is divided into a plurality of sections according to different SO2 contents, a sectional hydrogenation method is adopted, gas subjected to the primary hydrogenation enters the secondary hydrogenation, air is introduced into the gas subjected to the secondary hydrogenation, and after side reaction products generated by hydrogenation are oxidized into sulfur and SO2, residual tail gas is sent back to an inlet of the activated carbon desulfurization device. Through first-stage hydrogenation and second-stage hydrogenation, the temperature rise of the hydrogenation reaction is reduced, side reactions are reduced, and the SO2 conversion rate is improved; oxidation-method tail gas treatment is adopted to directly return to activated carbon for desulfurization, and no waste gas is discharged on the whole.

The invention relates to the technical field of waste heat recovery, and particularly discloses an efficient waste heat recovery system based on secondary lead smelting and a cascade using method thereof.The efficient waste heat recovery system comprises a smelting furnace, an air preheater, a cyclone dust collector, a box type dust collector, a waste heat boiler and a raw material drying machine which are sequentially connected; a vertical cylinder with the lower end extending out is concentrically fixed to the top of the heat preservation outer shell, a heat exchange rotor is rotationally arranged at the upper end of the vertical cylinder, the interior of the heat exchange rotor is evenly divided into a plurality of sealed fan-shaped spaces, the fan-shaped spaces are filled with phase change heat storage materials, and a plurality of sets of vertical tubes are arranged in each fan-shaped space. A plurality of groups of radial through heat exchange tubes are arranged in each fan-shaped space; according to the waste heat efficient recovery system and the waste heat cascade using method, on the premise that high-temperature flue gas waste heat is efficiently utilized, corrosion of high-temperature strong acid gas to the heat exchange pipes and the heat exchange media can be avoided, and the service life of the air preheater is guaranteed.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

The invention discloses a control method, device and equipment of a semi-dry method deacidification system and a medium, and relates to the technical field of household garbage incineration power generation treatment. Determining a prediction error value and inputting the prediction error value into a feedforward controller of the first PID controller; the feed-forward controller determines a lime slurry flow feed-forward compensation value according to the prediction error value; based on the lime slurry flow feedforward compensation value, a lime slurry flow error compensation value output by a main controller of the first PID controller and the actually measured lime slurry flow serving as a disturbance compensation value, a first control instruction used for controlling the opening degree of a lime slurry adjusting valve is output through an auxiliary controller of the first PID controller. The method is suitable for a control scene of a semi-dry deacidification process.

The invention relates to the technical field of catalyst recovery, and discloses a method for non-destructively recovering a waste catalyst carrier and noble metal. The present invention uses a noble metal leaching agent comprising an oxidizing agent, a ligand precursor, and water for recovering spent catalyst supports and noble metals. The method comprises the following steps: after roasting and reducing the waste catalyst, leaching the waste catalyst in the precious metal leaching agent, and carrying out first solid-liquid separation and washing to respectively obtain a waste catalyst carrier and precious metal. According to the method, a form of firstly reducing and then oxidizing is adopted, a compound leaching system is used for replacing a traditional leaching system based on hydrochloric acid, acid gas volatilization during leaching reaction is reduced, environmental pollution is reduced, and the operation environment is improved.

The invention relates to an MOF nano flame retardant with a porous hollow structure and a preparation method of the MOF nano flame retardant, and belongs to the crossing field of a nanotechnology and a flame retardant technology. The MOF nano flame retardant with the porous hollow structure, provided by the invention, is different from an existing flame retardant etching preparation method, and the MOF nano flame retardant with the porous hollow structure is prepared by adopting a mode of generating hydrochloric acid in situ and slowly blowing out redundant acid gas by nitrogen to ensure that excessive etching does not occur, and performing acid etching and chambering in situ. The MOF nano flame retardant with the porous hollow structure, provided by the invention, is different from an existing MOF structure, the mass transfer effect is improved by chambering, the mass transfer and heat conduction effects are good, and the decomposition temperature is high.

The invention discloses a treatment system and method for waste incineration fly ash washing liquid cooperating with flue gas purification, and the system comprises a semi-dry desulfurization tower, a dust remover, an ash silo, a washing tank, a buffer tank, a water supply preheater and a wet washing tower which are connected with a main flue of an incineration plant, the method comprises the following steps: transferring waste incineration fly ash collected in the system into the water washing tank, and adding water for washing to obtain water washing liquid and desalted fly ash; the method comprises the following steps: spraying fly ash water washing liquid by using a wet washing tower, recovering tail flue gas waste heat, deeply removing residual acid gas in flue gas, concentrating and reducing the water washing liquid, and controlling the spraying amount to adjust the concentration ratio so as to realize the separation and solid-liquid separation of chlorine salt; introducing the concentrated water washing liquid into a semi-dry desulfurization tower, atomizing the water washing liquid into fine liquid drops by using a rotary atomizer, contacting the fine liquid drops with hot flue gas, evaporating the fine liquid drops to dryness, and absorbing acid gas in the flue gas at the same time, thereby realizing zero emission of the water washing liquid and cooperating with flue gas purification. According to the invention, the problem of high energy consumption of fly ash washing liquid treatment is solved, and the resource utilization rate of the washing liquid is improved.

The invention discloses multistage spraying-adsorption deep purification equipment for naphthalene sulfonic acid production tail gas, and belongs to the technical field of industrial waste gas treatment. The multistage spraying-adsorption deep purification equipment for the naphthalene sulfonic acid production tail gas comprises a spraying tower, a cyclone separator and an adsorption box which are sequentially connected, the spraying tower is sequentially provided with a conical liquid collecting tank, a dispersion plate, a filler layer and an alkali liquor spraying pipe from bottom to top, and one side of the spraying tower is provided with a tail gas inlet pipe inserted into the lower portion of the dispersion plate. According to the multi-stage spraying-adsorption deep purification equipment for the naphthalene sulfonic acid production tail gas, the multi-stage spraying, cyclone separation and adsorption technologies are combined, SO2, acid gas and organic pollutants in the naphthalene sulfonic acid production tail gas are efficiently removed, the emission of harmful substances is reduced by adopting an efficient waste gas treatment method, and the environmental pollution is reduced. Meanwhile, waste water is recycled through the waste liquid collecting pool, and the activated carbon layer subjected to silanization treatment has good hydrophobicity.

Flue gas is compressed to high pressures, which raises the partial pressure of carbon dioxide thus facilitating its absorption into physical solvents (e.g., water, salt solutions, methanol). When added onto an existing CO2-producing process, the compression is performed using multiple stages with intercooling. After the high-pressure carbon dioxide dissolves into the physical solvent, it flows through a series of pressure letdowns using turbines that allow the dissolved carbon dioxide to evolve from the solvent. Through a series of multiple compression stages, the evolved gas is compressed for transport, utilization, or storage. The flue gas that has been scrubbed of carbon dioxide flows through a series of expanders with interheating supplied from waste heat, or the heat of compression. The process is enhanced by employing alkalis that chemically react with acid gases, such as carbon dioxide. These same CO2-capture processes can be integrated into processes that produce shaft and / or electrical power.

The invention belongs to the technical field of sulfur recovery, and particularly relates to a treatment process and a treatment device for ultralow-concentration acid gas, which are applicable to treatment of acid gas with H2S less than 1% in industries such as coal chemical industry and the like. According to the treatment process of the ultralow-concentration acid gas, the ultralow-concentration acid gas and Claus hydrogenation tail gas are mixed, then introduced into the steam generator for cooling and further introduced into the quench tower for treatment, so that on one hand, the temperature of the hydrogenation tail gas can be reduced, and on the other hand, the effect of injecting ammonia into quenched water can be achieved; while sulfur resources are fully recovered, dual treatment of H2S and NH3 in the ultralow-concentration acid gas is realized.

The invention relates to the technical field of environmental protection, in particular to a sludge incineration flue gas efficient purification system which comprises a pretreatment module, a dynamic ion separation module, an acid gas neutralization module, a heavy metal adsorption module, an acid-gold interaction purification module, a deep oxidation module and an intelligent control module. Wherein the pretreatment module is used for receiving initial flue gas flow; the dynamic ion separation module is used for primarily separating heavy metal ions; the acid gas neutralization module is used for stabilizing emission of acid gas; the heavy metal adsorption module is used for accurately adsorbing heavy metal ions; the acid-gold interactive purification module is used for treating composite pollutants; and the intelligent control module is used for automatically adjusting module operation parameters. According to the sludge incineration flue gas treatment system, by integrating an efficient purification technology and intelligent control, comprehensive removal and stable up-to-standard emission of various pollutants in sludge incineration flue gas are achieved, and the response speed, the purification efficiency and the energy-saving effect of the system are improved.

The invention relates to the technical field of natural gas synthesis processing, in particular to a skid-mounted system for preparing biogas from biogas, which comprises a tower pry and a heat exchanger pry which are vertically arranged and connected with each other, an absorption tower, a regeneration tower, an acid gas separator and an acid gas condenser are arranged on the tower pry; an amine liquid reboiler, an amine liquid filter, an activated carbon filter, a condensate delivery pump, a lean amine pump and a lean and rich amine heat exchanger are arranged on a lower platform of the heat exchanger pry; a condensate collecting tank, an amine liquid cooler and a natural gas filter are arranged on an upper platform of the heat exchanger pry; the tower pry and the heat exchanger pry are installed in a combined mode, so that the utilization rate of the internal space of the pry can be increased, and freight transportation is facilitated; and the disassembly and maintenance operation of the two towers can be realized only by building a simple lifting device on the uppermost platform.

The invention provides an ozone flue gas denitration device and a denitration method thereof, and belongs to the technical field of flue gas denitration. The ozone flue gas denitration device comprises a denitration tank, a gas inlet pipe and an exhaust pipe, the gas inlet pipe and the exhaust pipe are installed on the side wall of the denitration tank, a pretreatment mechanism is installed in the denitration tank, and the pretreatment mechanism comprises a spray pipe, a filter plate and a rotating seat. By arranging the pretreatment mechanism, an alkaline solution can be injected into a spray pipe through a water pump and is sprayed into flue gas through a spray head, particle impurities in the flue gas are removed, acid gas such as sulfur dioxide in the flue gas can be effectively removed, the flue gas is humidified, favorable conditions are provided for a subsequent ozone reaction, and in the spraying process, the treatment efficiency is improved. The temperature of the flue gas is reduced while the humidity is increased, so that the reaction efficiency of ozone is improved, then a rotating seat and a scraper blade are driven by a first rotating shaft to rotate, and under the action of centrifugal force, particle impurities attached to the surface of a filter plate are thrown into a collecting bin to be collected, so that the device is convenient to use.

The invention discloses a catalytic carbonized flame-retardant polyolefin nano composite material as well as a preparation process and application thereof, and relates to the technical field of macromolecular flame-retardant materials. The composite material comprises the following components: a polyolefin matrix, a metal organic framework, aluminum hypophosphite, transition metal nickel, and mercaptan and alkene monomers used for a dynamic mercaptan-alkene click reaction. According to the present invention, the three-time combination flame retardation effect of physical barrier-chemical quenching-pyrolysis gas dilution is achieved, when the fire occurs, the staged catalysis mechanism can accurately respond to different temperature stages, and the nickel ions trigger the polyolefin pre-crosslinking at the temperature of 200-250 DEG C to form the three-dimensional network so as to construct the physical barrier so as to achieve the fire retardation effect; aluminum hypophosphite at the temperature of 300 DEG C or above is pyrolyzed to release acid gas to etch the shell of the MOFs and release the free radical trapping agent, chemical quenching and pyrolysis gas dilution are carried out, and the good mechanical property of the polyolefin material is kept.