487 results about "Electrostatic precipitation" patented technology

The invention relates to an air purification system comprising a air passage. An air inlet unit, a high-voltage electrostatic precipitation unit, a mist spray purification unit, and an air discharge unit are arranged along the air passage. The high-voltage electrostatic precipitation unit and the mist spray purification unit are arranged sequentially or in a reversed sequence. The invention also provides an air purification control method based on the air purification system. According to the invention, related devices in the air purification system are considered as a device layer, and a control layer and a control management layer are arranged. The device layer performs sensor and measuring instrument data acquisition and transmission, and performs driving and controlling over a variable frequency motor, a high-pressure controller and a solenoid valve. The control layer acquires information of related devices in the device layer, and controls the working statuses of the devices. The control management layer performs control and management upon the entire system. With the air purification system and the control method thereof, purification effect is good. The system and the method are energy-saving and environment-friendly.

The invention relates to the technical field of air filter products, in particular to an electrostatic precipitation filter which is used for trapping particulate matters in air efficiently and has an integrated structure and a polarization process for the electrostatic precipitation filter. A main body of the electrostatic precipitation filter is formed by overlaying a plurality of layers of pore plates, wherein array holes through which the air passes are formed in the pore plates integrally; the pore plates are micro-foamed and made of a plastic material added with a polarization reinforcing material, a negative ion emitting material and a magnetic material; closed conducting films for applying high-voltage electric fields are arranged on upper and lower surfaces of each layer of pore plate, and ion emitting devices are arranged in one or more of layers of pore plates; and a high-voltage power supply for supplying power to a high-potential electrode and a low-potential electrode is encapsulated on the lateral surface of an overlaid structure, the overlaid structure and the high-voltage power supply are encapsulated in an outer frame of a protective structure integrally, and the outside of the outer frame is powered by low-voltage direct current or a mains supply. The electrostatic precipitation filter is processed by an on-line polarization technology to form a practical product. Due to the adoption of the technical scheme, the particulate matter filter can eliminate interelectrode sparking and electric shock hidden troubles, is easy to clean, low in wind resistance and high in efficiency, has long service life, can be recycled and is suitable for household and industrial air purification devices.

The invention discloses complete equipment and a method for extracting and purifying precious metals from waste circuit boards. The complete equipment comprises a bottom-blowing furnace, a secondary smoke combustion furnace, an absorption tower, a pulsed jet cloth filter, a wet desulfurization device and an electrostatic precipitation defogging device, and is characterized in that smoke generated by the bottom-blowing furnace is discharged through a flue arranged on the top of the bottom-blowing furnace; the flue communicates with an inlet of the secondary smoke combustion furnace; the secondary smoke combustion furnace communicates with a spraying quenching tower through a smoke waste heat boiler; an outlet of the spraying quenching tower communicates with the pulsed jet cloth filter through the absorption tower; an activated carbon spraying device is arranged inside the absorption tower; the pulsed jet cloth filter communicates with the wet desulfurization device; and the wet desulfurization device communicated with a chimney through the electrostatic precipitation defogging device. Effective separation and respective enrichment and recycle of various metals are achieved, organic substances are used as fuel, and no secondary pollution is generated for the environment. The process procedure is short, and the remarkable economic, environment-friendly and social benefits are achieved.

The invention provides a novel high-frequency and high-voltage power supply for electrostatic precipitation, which comprises a rectifier module, a load module, a plurality of parallel power conversion circuit modules and a control loop module, wherein the parallel power conversion circuit modules and the control loop module are arranged between the rectifier module and the load module. The new high-frequency and high-voltage power supply for the electrostatic precipitation can overcome the defects of the traditional power-frequency power supply and the existing high-frequency power supply, and has good reliability and large power.

The invention discloses a high-frequency high-voltage power supply for electrostatic precipitation, and a control method of the same. The power supply comprises a rectification module, a high-frequency inverting module, a transformer module, a high-voltage rectification module, an upper computer monitoring and system fault diagnosis unit, a system power supply module, a remote monitoring unit and a control unit. The method is specified as follows: a three-phase AC power supply is output in DC form by a three-phase rectification and filtering circuit, then, the DC is output in high-frequency AC form by a high-frequency inverting circuit, the high-frequency AC is boosted by a high-frequency boosting transformer, finally, the boosted current is rectified into high-voltage DC by a high-frequency rectification silicon stack, and the high-voltage DC is loaded to an electrostatic precipitation load; after being treated with signal conditioning and processing, the data of inside of the power supply acquired in real time is input into the control unit for controlling the high-frequency inverting circuit so as to regulate the output of the power supply, the control unit transmits the acquired parameters to the upper computer via a CAN(Controller Area Network)bus interface, and the upper computer executes fault diagnosis, provides the current operational state of the power supply and the fault diagnosis result, and periodically transmits the state and the result to a remote terminal.

The invention relates to a flue gas processing system and a flue gas processing method capable of enabling low-low temperature electrostatic precipitation to be combined with a water pollination type GGH (Gas Gas Heater). At present, a flue gas processing system and a flue gas processing method which are capable of meeting a new emission standard and preventing the corrosion of a chimney are not provided. The flue gas processing system disclosed by the invention is characterized by comprising a terminal controller, a steam regulating valve, a steam auxiliary heater, a water inlet pipe, a water return pipe, a steam inlet pipe and a steam outlet pipe, wherein the steam auxiliary heater is arranged on the water inlet pipe, the steam inlet pipe and the steam outlet pipe are both connected to the steam auxiliary heater, and a flue gas temperature detector and the steam regulating valve are electrically connected with the terminal controller. The flue gas processing method disclosed by the invention is characterized by comprising the following steps of carrying out heat exchange between high-temperature flue gas in a flue gas duct and a low-temperature working medium in a flue gas heat recycling device when the high-temperature flue gas in the flue gas duct flows through the flue gas recycling device, and carrying out heat exchange between a high-temperature working medium and low-temperature purified flue gas which is output through a desulfurizing tower and a demister in the flue gas duct after the low-temperature working medium is heated into the high-temperature working medium. According to the flue gas processing system and the flue gas processing method, disclosed by the invention, the new emission standard is met, and the corrosion of the chimney is prevented.

The invention discloses a matrix-type honeycomb photocatalysis plasma purifier comprising a housing and a purifying unit module arranged and between an inlet and an outlet in the inner cavity. The purifying unit module consist of a primary filter, an electrostatic precipitation filter, a photocatalysis plasma catalyzing and purifying filter and a positive-negative ion stirrer which are sequentially arranged from the inlet to the outlet; then the air sequentially entering from the inlet and having impurities is purified, and fresh air is discharged finally at the outlet. The matrix-type honeycomb photocatalysis plasma purifier integrates the functions of high-efficiency sterilization, virus killing, dedusting, deodorization, formaldehyde removal, decoration gas removal and organic waste gas degradation, realizes large specific surface and high dust collection efficiency and discharges static electricity at the front end and the back end so as to ionize the air with static electricity discharging efficiency higher than the conventional single-area static electricity discharging efficiency; the photocatalysis plasma catalyzing and purifying filter catalyzes and oxidizes harmful chemical odorous gas, and generated plasmas are in high concentration, so that germs can be completely killed; and the matrix-type honeycomb photocatalysis plasma purifier suffers little wind resistance and realizes massive dust collection.

The invention relates to an air purification system, and in particular relates to a large-air volume discretely driven intelligent integrated-control air purification system. The large-air volume discretely driven intelligent integrated-control air purification system solves the problems of higher cost and failure in real-time monitoring and regulation of various parameters caused by single drive in the existing air purification system. The large-air volume discretely driven intelligent integrated-control air purification system comprises an enclosed mounting space, and a PLC (Programmable Logic Control) central controller; a coarse filtration section, a medium efficiency filtration section, an electrostatic precipitation section, a chemical filtration section, a fan driving section, a heating surface cooling section and a sub-efficient filtration section are orderly arranged in the enclosed mounting space; the coarse filtration section, the medium efficiency filtration section, the chemical filtration section and the sub-efficient filtration section are all provided with a differential gage; and the air outlet of a fan is provided with an air velocity transducer, and the fan is connected with a control end of the PLC central controller via a frequency converter. The large-air volume discretely driven intelligent integrated-control air purification system has the characteristics of high energy-saving property, high air evenness, low noise and low vibration, and can be widely used for purifying the large indoor environment.

The exemplary system / apparatus can include an electrostatic precipitation apparatus for room ventilation, which can have a two-stage charging type electrostatic precipitator including an ionization section, a particle collection section and a power supply. The exemplary apparatus can include a constant-current control unit / arrangement interposed between the power supply and the ionization section. A sensing unit / arrangement can be interposed between the power supply and the particle collection section. A voltage step control unit / arrangement can receive the applied voltage value and current value from the sensing unit / arrangement for issuing a command to increase or decrease the predetermined voltage to prevent the particle collection section from anomalously discharging in response to an anomalous discharge. A voltage changing unit / arrangement can change the predetermined voltage in response to a command from the voltage step control unit to control a current and a voltage provided from the power supply to the particle collection section.

The invention provides an electrostatic precipitation system for air in a high wind-speed tunnel, which belongs to the technical field of air purification. The system comprises a purification module, a detection module and a cleaning process module, wherein the input ends of the purification module and the detection module both receive tunnel air; the cleaning process module is connected with the purification module; and the purification module comprises a pre-filter, an air flow distributor, an electrostatic precipitator, a slot-formed filter and a post-filter. Under the conditions of wind speed of 4 to 9m / s and dust content of 0.2 to 10mg / m<3>, the dust collection coefficient reaches 90 to 98 percent, and the dust re-entrainment can be effectively restrained; and all parts are designed and manufactured according to modular requirement, so that the system is assembled and disassembled conveniently.

The invention discloses a fresh air conditioner control method. The method comprises the steps of 1) detecting the indoor actual temperature value T and the indoor CO2 actual concentration value X when the air conditioner is started or operates normally; selecting the operation mode of the fresh air conditioner according to the actual temperature value T and the CO2 actual concentration value X; 3) enabling the air conditioner to enter the selected operation mode to operate. The invention further discloses the fresh air conditioner. The fresh air conditioner comprises a temperature sensor, a CO2 concentration sensor, a controller, a three-way electromagnetic switching valve for switching a novel air channel and a return air channel and an electrostatic precipitation filter. The temperature sensor detects the indoor temperature and transmits the indoor temperature to the controller, the CO2 concentration sensor detects the indoor CO2 concentration and transmits the CO2 concentration to the controller, the controller controls the starting and stopping of an indoor unit, an outdoor unit and an electrostatic precipitation filter box and the switching of the three-way electromagnetic switching valve. According to the method and the air conditioner, the automatic operation control mode is provided, and electrostatic precipitation can be performed on fresh air.

A coagulation-type electrostatic precipitation method and its apparatus features that the small charged dust particles are coagulated to become big ones for easily removing them. The dust-contained airflow is divided into two streams. One is electrified by positive charges and another by negative charges. After they are conveyed together, the particles with different polarities are coagulated and then they are separated out by the inertial separation method. Its advantages are small size device and high efficiency.

The invention provides a method and device for removing dust in flue gas and relates to a static de-dusting method and device for collecting dust in industrial flue gas. By combining the principles of electrostatic spraying charge and electrostatic precipitation, an electrostatic spraying charge area is arranged between a gas-flow uniform distributing plate and a dust-collecting electric field. An electrostatic spraying method is used for loading negative charges on water droplets, wherein the dust and the charged water droplets mutually attract and collide and then flow by a dust-collecting electric field space; the dust-collecting electric field space comprises a polar line and a dust collecting polar plate; dust particles move towards the dust collecting polar plate and deposit on the dust collecting polar plate while the charged water droplets evaporate; and the collected dust falls into a dust bucket under the vibration action, thereby purifying the flue gas. The device comprises a gas-inlet smoke box, a gas-flow uniform distributing plate, a dust-collecting electric field, a slot plate, a gas-outlet smoke box and the dust bucket, and is technically characterized in that at least one group of electrostatic spraying nozzles are arranged between the gas-flow uniform distributing plate and the dust-collecting electric field. The device provided by the invention has the advantages of high de-dusting efficiency, especially higher de-dusting efficiency to the submicron-level dust and excellent dust adaptability, and can be used for reducing the secondary flying caused by the vibration of an electric de-dusting device.

The invention relates to a device for purifying tunnel air pollutants in the technical field of air purification. The device comprises an electrostatic precipitation module, an air circulation module, a three way catalyst module, a measurement and control module, at least one purification module and at least one absorption module, wherein, the input terminal of the electrostatic precipitation module receives the tunnel air, the output terminal of the electrostatic precipitation module is respectively connected with the input terminal of the purification module and the air inlet of the air circulation module, the output terminal of the purification module is connected with the input terminal of the absorption module, the output terminal of the absorption module is respectively connected with the air outlet of the air circulation module and the input terminal of the three way catalyst module, and the output terminal of the three way catalyst module and the air outlet of the air circulation module discharge the pollutant to the air directly. The device can effectively avoid the phenomenon that temperature is out of control, a purification chamber and an absorption chamber are made from high temperature resistant material, and the thermal expansion coefficient is small; and examination, automatic control and safety warning are carried out by the measurement and control module.

The invention discloses a wet desulfurization flue gas treatment system and treatment method, and aims at overcoming the defects that at present, the white smoke phenomenon is prone to be formed when desulfurization flue gas is treated and then exhausted to the atmosphere through a chimney, and electric power consumption and investment and operation cost in wet electrostatic precipitation are high. The wet desulfurization flue gas treatment system comprises an electrostatic precipitator, a wet desulfurization tower, a wet phase change condensation precipitator and a chimney which are sequentially arranged in the flow direction of the flue gas; an induced draft fan is installed between the electrostatic precipitator and the wet desulfurization tower, and a liquid outlet is formed in the lower end of the wet phase change condensation precipitator and connected to the wet desulfurization tower through a pipeline; a condensation pipe is arranged in the wet phase change condensation precipitator, a cyclic liquid inlet pipe is connected to one end of the condensation pipe, and a cyclic liquid outlet pipe is connected to the other end of the condensation pipe. Accordingly, the white smoke phenomenon is not prone to be formed when the desulfurization flue gas is treated and then exhausted to the atmosphere through the chimney, the whole treatment system is low in power consumption, the investment and operation cost is reduced, and the treatment system can effectively recycle industrial water.

Devices for removing particles for a gas utilizing electrostatic precipitation comprising collector modules with fewer electrical connections, which facilitate cleaning, and / or eliminate the need for high voltage connections between a removable collector module and a collector module support. Driver electrode modules provide electrical connection between an insulated driver electrode and a source of electrical potential or between insulated driver electrodes and at least one other conductor through a hole in or on some edge on the driver electrodes. A biasing force is provided and a conductive element serves as a conductor between the driver electrode(s) and the other conductors. A plurality of insulated driver electrodes, e.g. plates, are formed with a single, conductive plate or from a plurality of electrically joined conductive plates which are coated with insulation and then bent. An electrically-shielded, high voltage generating circuit is integrated with a readily removable collector module to eliminate the need for high voltage connections between the removable collector module and the collector module support, while enhancing the device's durability and allowing cleaning with cleaning fluid and / or dishwasher detergent.

The invention relates to a fresh air system control method based on real-time monitoring of indoor air quality. Indoor air quality parameters are monitored by an air quality monitoring unit in real time, power of a fan unit is adjusted by a central controller according to the monitoring result, and the technical effect of energy saving is realized. A dust removal control module for detecting dustparticle breakdown voltage, an ultrasonic vibration module and a clear water cleaning water are arranged in a self-cleaning electrostatic precipitation unit, automatic cleaning of a dust collecting plate is realized, and the safety problem and the equipment damage problem caused by manual cleaning of the dust collecting plate are avoided. According to the method, the electrostatic precipitation manner is adopted, no consumable exists, the use cost is reduced, and the economy is good.

The invention relates to a method for deacidification of an alkylation reaction product. In the method, after being subject to gravity settling, mixed emulsified liquid of the alkylation reaction product (hydrocarbon oil) and sulfuric acid passes through a component with hydrophobic modified ceramic membrane at a membrane surface speed of 0.01-5m / s for separation, and the deacidification of oil is achieved in a cross current filtration mode under the operation pressure of 0.01-0.3MPa and at the operation temperature of 0-40 DEG C. Under the push of pressure, the oil passes through the ceramic membrane, acid in the oil is trapped, and the acid content in the obtained oil is lower than 100ppm, thereby greatly reducing alkaline usage and waste water generation amount in an acid-base refine system of an alkylation technology and reducing the use of electrostatic precipitation; and the ceramic membrane surface is subject to hydrophobic modification, thus the contact angle of water droplet on the membrane surface is 70 degrees-16 degrees. The method is suitable for removal of polar liquid in various oils, has the advantages of simple process, low energy consumption, high separation precision, no environment pollution and high economic and practical value, and is easy to achieve industrial application.

The invention relates to a method and a device for removing sulfur and carbon oxides from power plant flue gas in a combination mode, which are used for removing the sulfur and carbon oxides from the power plant flue gas at high efficiency and low consumption. The method comprises the following steps of: introducing high temperature flue gas subjected to electrostatic precipitation into a heat exchanger and heating decarburized solution in a removing process by using waste heat of the flue gas; feeding the heated decarburized solution into an absorption tower, decomposing ammonia water out and feeding the ammonia water back to an ammonia water storage tank; and allowing low temperature flue gas subjected to heat exchange to enter the removing process in combination with desulfuration and decarburization processes. The invention also provides the device for implementing the method. In the invention, the ammonia water is used as an absorbent, ammonia can be chemically circulated, and the cost of the absorbent is reduced; and the waste heat of the flue gas is effectively utilized to heat the decarburized solution, energy of a power plant can be utilized in a stepped way, and energy consumption during carbon capture is greatly reduced. The method and the device have the characteristics of high efficiency, high cleanness, low energy consumption, high integration of a desulfuration system and a decarburization system and have a wide application prospect on desulfuration and decarburization of a coal fired power plant.

The invention discloses a dust-collecting pole plate of a wet water-film electrostatic precipitator, which mainly solves the problem that a complete uniform cover water film is difficultly formed on the surface of the current pole plate. The dust-collecting pole plate comprises an inner material layer which is used for absorbing water and allows water to flow from top to bottom. Two sides of the inner material layer are composited with external material layers which can allow water to penetrate. The porosity of the external material layers is smaller than the porosity of the inner material layer at the corresponding height, and therefore the water can slowly leak from the inner surfaces to the outer surfaces of the external material layers, and complete water films are formed on the outer surfaces. The dust-collecting pole plate has the advantages of simple structure, low water consumption and high efficiency of dust collection. Under the premise that the conventional electrostatic precipitator design is not majorly changed, the current dust-collecting pole plate is replaced and a water inlet pipeline is connected so that the electrostatic precipitator can put into effect, and a mechanical vibration ash removal device does not need to be specially deployed. The dust-collecting pole plate can be conveniently used for the design upgrade and the improvement update of the current electrostatic precipitation equipment and has the advantage of large-scale application.

The invention discloses a wide polar plate electrostatic precipitation module which is installed on a purifier to serve as a core electrostatic precipitation component. The invention mainly comprises an anode wide aluminium plate, a cathode narrow aluminium plate, high-energy ion wires, a tip conduction fixing aluminum strip, a plastic fixing component and a plastic handle. The invention can serve as the core electrostatic precipitation component of the purifier and releases 6 KV direct current high voltage via the high-energy ion wire of 0.15mm in thickness to generate an ionization field so as to carry out ionized gas reaction for passing air macroparticles; compared with the former electrostatic precipitation module, the electrostatic precipitation module of the invention still has efficient dedusting and purifying effect under the condition of reducing volume, voltage, current and power. The above design can improve the purification efficiency of the electrostatic precipitation module and can safely and efficiently silence and save energy.

The invention discloses an electrostatic-precipitation pulse power supply control system, which comprises a major loop, a controller and a trigger driving sampling loop, wherein the major loop comprises a first loop which provides a continuous fundamental wave voltage for a dust remover, and a second loop which provides a discontinuous pulse voltage for the dust remover; the controller controls the fundamental wave voltage to be lower than full breakdown voltage of spark discharge inside the electric field of the dust remover; and the controller controls the pulse voltage to be 3-5 times of the fundamental wave voltage. The voltage output by the system is large; when the dust remover performs spark discharge, the turn-off time is not required; the field energy is quickly recovered; the back corona site can be overcome; the dust collection effect is obvious, in particular to small dust in the electrostatic precipitator; the working frequency is high; the power factor is large; a three-phase power supply is used for supplying power; the three-phase power grid is balanced, so that the harmonic pollution to the power grid is low, the volume and the weight of a transformer are reduced, and the consumable is saved.

Apparatus and methods for detecting the presence of an airborne chemical or biological analyte utilize:a substantially gas- and liquid-impermeable container;means for introducing a substantially analyte-free collection liquid into said container;means for rapidly sampling ambient air and transferring said analyte therefrom into said collection liquid, said sampling means comprising an air intake means and and an air venting means; andmeans for removing from said container an analyte-enriched collection liquid;wherein said volume of air passes through a substantially horizontal air inlet and downward through a substantially vertical collector electrode tube with means for applying an electric field between said tube and a co-axial spiked wire- or rod-shaped discharge electrode.Efficient wet electrostatic precipitation with efficient collection of captured particles into a tiny liquid volume are achieved by the use of a liquid flow system comprising a programmable reversible pump with a reversible filter and appropriate liquid connections and valves. Injection of water sprays into the air stream and onto the interior walls of the collector electrode permits thorough wetting of interior surfaces and efficient removal of residual captured particles.

The invention provides a self-adaptive and self-cleaning electrostatic precipitation device. The self-adaptive and self-cleaning electrostatic precipitation device comprises an electrostatic precipitator, an ultrasonic vibrator, an ozone filter and a self-adaptive controller. The self-adaptive controller is electrically connected with the electrostatic precipitator and the ultrasonic vibrator andused for controlling the work voltage of the electrostatic precipitator and the work mode of the ultrasonic vibrator. The invention further provides a self-adaptive and self-cleaning electrostatic precipitation method. According to the self-adaptive and self-cleaning electrostatic precipitation device, the current breakdown voltage is collected through the self-adaptive controller, the electrostatic precipitator is made to always work in the corona state existing before breakdown, PM1, PM2.5, PM10, ozone and other harmful gas pollutants in air can be effectively removed, and the electrostaticprecipitation device is a civil small-sized self-adaptive dust removal device capable of being applied to a fresh air system. Meanwhile, a breakdown voltage threshold value is set in the self-adaptivecontroller, the dust accumulation amount on a dust accumulation plate is detected, accumulated dust on the dust accumulated plate is automatically removed, the dust removal efficiency is optimized, and the performance is improved.

The invention discloses an efficient wet type electrostatic-precipitation desulfurization system and a process thereof. A wet electrostatic precipitator is used for replacing an existing demister in a desulfurization tower. The wet electrostatic precipitator has more powerful capability and higher efficiency in removal of liquid drops and fine dust in flue gas than the demister, so that the wet electrostatic precipitator achieves high environmental protection discharge requirements, guarantees the desulfurization efficiency, and improves the efficiency of a dust removal system of a desulfurization tower, reduces the discharge concentration of dust at an outlet of the desulfurization tower and achieves the latest discharge standard required by the nation. By means of replacing the demister with the wet electrostatic precipitator, the gypsum rain problem is solved, and joint removal of various pollutants is achieved. Further, a water collection disc is added between a desulfurization absorption area and the wet electrostatic precipitator; as the water collection disc collects flushing water of the wet electrostatic precipitator for recycling, the flushing water of the wet electrostatic precipitator is prevented from entering a neutralization oxidation pond of the desulfurization tower directly, and water balance of the whole system is guaranteed.

The invention discloses a method and system for deeply removing dust from flue gas after wet desulfurization. The method comprises the following steps: performing coagulation on PM2.5 fine particles in flue gas after desulfurization to magnify the particles by steam, and then performing wet electrostatic precipitation. The system for deeply removing dust from flue gas disclosed by the invention comprises a phase change condensing chamber, a condensing defogger and an electrostatic precipitator, wherein the phase change condensing chamber is abutted against the flue gas desulfurization system; a plurality of steam nozzles are arranged in the phase change condensing chamber; the steam nozzles are connected with the steam system through a steam distribution pipe; the electrostatic precipitator is abutted against the outlet of the phase change condensing chamber; and the condensing defogger is arranged on a passage between the phase change condensing chamber and the electrostatic precipitator. The method and system for deeply removing dust from flue gas after wet desulfurization disclosed by the invention effectively solve the problem that the particle sizes of inlet particulate matters of a wet electrostatic precipitator is small, so that the charging is difficult, the dust removal efficiency is improved and deep dust removal is realized.

The invention discloses a method for removing carbon black and high polymer in the preparation of acetylene by cracking natural gas with plasma. The method comprises the following steps: 1) the cracked gas from a gas generating process enters a hot water washing tower from a bottom charge end, performs the spray washing of hot water with the temperature of 60-130 DEG C and the absorption of porous packing and is discharged from a discharge end on the top of the hot water washing tower; 2) the gas leaving the hot water washing tower enters a single-stage electrostatic precipitator to perform single-stage electrostatic precipitation treatment; and 3) the treated gas enters a cold water washing tower from a bottom charge end, performs the spray cooling of water with the temperature of 20-40 DEG C and enters a gas holder for the post-treatment. By using the method, the carbon black and high polymer in the raw acetylene feed gas can be removed more thoroughly, the technological requirement of the preparation of acetylene by cracking natural gas with plasma can be satisfied; and the loss of acetylene can be reduced and the packing can be reused.