489 results about "Emission standard" patented technology

The invention provides a PLC-based biomass gasification industrial steam full-automatic intelligent control system and method. The system comprises a data acquisition module, a modeling identification module, a multi-objective optimization module, a rolling prediction control module, a coordination execution module, a self-adaptive correction module and an abnormal fault tolerance and safety control module. The system collects operation data of a feeding system, a gasification furnace, a boiler, a steam-water system and an environmental protection system in real time through a PLC platform, a dynamic coupling model of a combustion side, a steam-water side and an environmental protection side is established, and a multi-target constraint optimization model with stable steam pressure, up-to-standard emission and minimum energy consumption as targets is constructed. According to the invention, unattended operation of the biomass gasification industrial steam system is realized, the system has the advantages of high control precision, low energy consumption, stable emission and strong fault-tolerant capability, and the intelligence and safety of the industrial steam system are obviously improved.

The invention relates to the technical field of waste gas treatment, and discloses a method for treating odor, peculiar smell and organic waste gas through pretreatment enhanced absorption. The method comprises the following steps: acquiring waste gas component characteristic parameters through a sensor; calculating a pretreatment medicament formula by using a convolutional neural network; adding a medicament according to the instruction to remove easily-treated components and hardening and tempering difficultly-treated components; monitoring absorption liquid parameters to form characteristic indexes; adjusting gas-liquid distribution based on indexes to construct an optimal environment; introducing the quenched and tempered waste gas into the environment for enhanced absorption to obtain standard gas. Aiming at stink, peculiar smell and organic waste gas with complex and changeable components, through combination of intelligent pretreatment and enhanced absorption, components which are easy to treat and difficult to treat are efficiently and synergistically removed, meanwhile, the dosage of chemicals is reduced, the treatment stability is improved, and strict emission standard requirements are met.

The invention provides a pollution discharge permission evaluation and management method based on intelligent analysis, and relates to the technical field of pollution discharge management, and the method comprises the steps: obtaining first pollution discharge permission information of a first enterprise; generating first period enterprise pollution discharge data and first period enterprise energy consumption data; carrying out pollution discharge standard exceeding judgment to generate a first period judgment result; when the judgment result of the first period is that the standard does not exceed the standard, pollution discharge standard exceeding risk prediction and energy consumption prediction in a second period are carried out based on the enterprise pollution discharge data of the first period, the enterprise energy consumption data of the first period, the pollution discharge limit value information of the second period and the energy consumption limit value information of the second period, and a standard exceeding risk index is generated; and according to the standard-exceeding risk index, carrying out pollution discharge standard-exceeding reminding on the first enterprise. According to the method and the device, the problem that an early warning mechanism for future pollution discharge risks is lacked in the prior art can be solved, and the technical effects of timely supervision and emission standard exceeding reminding are achieved.

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device based on malodorous organic waste gas, which comprises a box body provided with a gas inlet, a containing cavity and a gas outlet, and the gas inlet, the containing cavity and the gas outlet form a waste gas treatment channel; the treatment assembly is arranged in the containing cavity and comprises at least two electrochemical oxidation units which are arranged in series in the air inlet direction, and each electrochemical oxidation unit is composed of an electro-catalysis set and a chemical catalyst plate which are connected. The multiple electrochemical oxidation units are arranged in the box body in the air inlet direction in series, waste gas is cooperatively treated through electro-catalysis and chemical catalysis, large-batch stink organic waste gas which is continuously and rapidly introduced can be effectively treated, it is ensured that gas at an air outlet reaches the emission standard, energy consumption is reduced, meanwhile, the treatment effect is improved, and the treatment cost is reduced. The environment-friendly requirement is met. In addition, the requirement of secondary treatment can be avoided, the overall treatment efficiency is improved, and the subsequent treatment cost is reduced.

The invention provides a self-coupling waste gas treatment system for treating VOCs in waste gas and a treatment method of the self-coupling waste gas treatment system, and belongs to the technical field of VOCs removal and recovery. The self-coupling waste gas treatment system comprises a microwave catalysis unit, wherein to-be-treated waste gas is introduced into the microwave catalysis unit, so that VOCs (Volatile Organic Compounds) are primarily decomposed and then enter a multi-stage condensation unit; the multi-stage condensation unit comprises at least two stages of condensation treatment parts and is configured to be in a cold source cyclic utilization mode, liquid separated after the waste gas to be treated is subjected to condensation treatment in the multi-stage condensation unit is recycled, and meanwhile, separated gas enters the drying adsorption unit; and the emission detection unit is configured to detect whether the purified waste gas from the drying adsorption unit reaches the emission standard or not, and the waste gas which does not reach the emission standard is re-introduced into the microwave catalysis unit to be circularly treated. The self-coupling system disclosed by the invention is high in integration level, and the whole-process efficient management and control of VOCs from pretreatment, deep recovery and fine treatment to up-to-standard emission is realized.

The invention relates to the technical field of bypass ventilation denitration systems, and discloses an intelligent bypass ventilation SCR (Selective Catalytic Reduction) coupling SNCR (Selective Non-Catalytic Reduction) denitration system which comprises a smoke chamber, a cyclone cylinder, a precise ammonia spraying system, an air mixing chamber, a cooling fan, a cold air valve, a dust collection chamber, an SCR reactor, an exhaust fan, a chimney, a stock bin, a bin pump, a compressed air system and an intelligent control system, the air inlet is connected with the smoke chamber, and the feed opening is connected with the bin pump. Under any working condition, NOx emission at a chimney outlet can reach the standard, the ammonia water consumption is lowest, the denitration effect is good, the investment cost is low, the problem that NOx emission of the kiln tail chimney is unstable and prone to exceeding the standard is solved, the catalyst abrasion and blocking risk can be greatly reduced, the catalyst dosage is small, the maintenance cost is low, and the method is suitable for industrial production. And long-term stable operation of the system is realized.

The invention relates to the technical field of pollution treatment, in particular to a full-automatic tail gas treatment remote control method applied to an intelligent cremation machine. The method comprises the following steps: acquiring tail gas emission data; according to the tail gas emission data, the emission standard exceeding trend is recognized, and tail gas emission standard exceeding data is obtained; determining an emission fluctuation rule based on the tail gas emission standard exceeding data; multi-stage tail gas purification parameter adjustment is conducted according to the emission fluctuation rule, and multi-stage tail gas purification adjustment parameters are obtained; performing full-automatic tail gas treatment simulation according to the multi-stage tail gas purification adjustment parameters to obtain tail gas treatment data; carrying out atomization failure detection according to the tail gas treatment data to obtain atomization failure data; performing nozzle blockage analysis based on the atomization failure data to obtain nozzle blockage data; and performing inner wall scaling detection based on the nozzle blockage data to obtain inner wall scaling data. The intelligent response rate and the purification standard-reaching rate of tail gas treatment of the intelligent cremation machine are improved based on the pollution treatment technology.

The invention discloses a sludge low-temperature oxidation treatment system and method. The system comprises a pretreatment unit, a feed lifting mechanism, a low-temperature oxidation furnace, a flue gas purification unit and an automatic control unit. The low-temperature oxidation furnace is divided into a feeding area, a low-temperature oxidation area and an air distribution and slag discharge area from top to bottom, an air distribution plate is provided with air outlets which are uniformly arrayed, the temperature of the low-temperature oxidation area is controlled to be 420-480 DEG C, and generation of dioxin is inhibited from the source. The pretreatment unit is used for mixing sludge, biomass and quartz sand to form a loose breathable material to prevent the sludge from hardening; the method comprises the steps of material mixing, continuous feeding oxidation, temperature closed-loop regulation and control, flue gas purification and ash treatment, high-water-content municipal sludge can be stably treated, the energy consumption is low, the dioxin generation amount is low, flue gas emission reaches the standard, ash can be recycled, and the method is suitable for large-scale municipal sludge harmless treatment.

The invention belongs to the technical field of environment-friendly treatment, and provides a treatment process for natural gas combustion waste gas generated by zinc chloride production based on zinc ash and zinc slag and acid mist waste gas generated by regenerated acid decoction, which comprises the following steps: S1, introducing the natural gas combustion waste gas and the acid mist waste gas into a spray tower, carrying out dynamic alkali neutralization treatment and cooling treatment on the basis of an intelligent pH value regulation and control method to obtain primary purified gas; s2, the primary purified gas enters primary plasma dedusting and demisting equipment through a pipeline to be treated, and secondary purified gas is obtained; and S3, the secondary purified gas enters secondary plasma dedusting and demisting equipment to be treated, and final treated tail gas is obtained. According to the invention, the chemical neutralization based on the spray tower and the two-stage plasma deep cracking are combined, the treated waste gas meets the emission limit value in the secondary standard in the Integrated Emission Standard of Air Pollutants, the treatment efficiency is high, the medicament consumption is low, the energy consumption is low, and the problems in the prior art are effectively solved.

The invention provides a boiler waste gas treatment device, and relates to the field of boilers and auxiliary equipment. A dust collecting box is inserted into the bottom of the rear side of the comprehensive treatment pipeline, a heat exchanger is fixedly installed on the outer side of the vertical middle of the comprehensive treatment pipeline, a dust blocking filter screen is slidably connected to the position, corresponding to the heat exchanger, in the inner wall of the comprehensive treatment pipeline, and an intermittent motor is fixedly installed on the outer wall of the rear side of the comprehensive treatment pipeline at the top of the dust blocking filter screen; a reciprocating hammering assembly is slidably connected to a front-end driving shaft of the intermittent motor, and a centrifugal motor is fixedly mounted in the middle of the top of the comprehensive treatment pipeline. An eccentric dial wheel and a reciprocating hammering assembly driven by an intermittent motor can automatically impact a filter screen to remove accumulated dust, manual maintenance is avoided, waste heat recycling is achieved through the design, the service life of equipment is prolonged through automatic cleaning of the filter screen, and the maintenance cost and energy consumption are reduced; the problems that particulate matter purification is low in efficiency, waste heat utilization is insufficient, deep purification is unstable, the maintenance cost is high, and emission is difficult to reach the standard are solved.

The invention provides a urea injection control method and device and a vehicle. For each stage of SCR in a two-stage SCR aftertreatment system, the urea injection amount matched with the stage of SCR is determined based on the target mode started by an engine, the temperature value of an inlet, the exhaust flow, the nitrogen and oxygen concentration and the degradation factor, and on the premise that the emission standard is met, the urea injection amount matched with the stage of SCR can be controlled. The operation mode requirement of the engine and the actual treatment capacity of the selective catalytic reduction device are matched in time, the aftertreatment cost is reduced, the service life of the aftertreatment system is prolonged, and therefore the comprehensive treatment effect of the two-stage SCR aftertreatment system on nitric oxide is effectively improved.

The utility model relates to a metal heat treatment furnace, which belongs to the technical field of heat treatment furnaces and comprises a heat treatment furnace main body, a furnace cover is arranged above the heat treatment furnace main body, a cooling mechanism is arranged on the furnace cover, a lifting mechanism is arranged on the back side of the heat treatment furnace main body, and a heat treatment frame is arranged below the furnace cover. According to the metal heat treatment furnace, by starting a draught fan, negative pressure is generated in a filter box, harmful gas generated by heat treatment is pumped into the filter box, the harmful gas enters a second connecting pipe after being subjected to three-layer filtration, and whether the harmful gas reaches the safe emission standard or not is monitored by a gas analysis monitor; and the metal is conveyed into the water tank to be subjected to heat exchange with the cooling liquid, the metal subjected to heat treatment is cooled, the metal subjected to heat treatment is conveniently taken, the purposes of cooling the material and preventing harmful gas from being directly discharged to pollute the environment are achieved, and the beneficial effects that the material is cooled, meanwhile, the harmful gas is filtered and the like are achieved.

The invention discloses a liquefied natural gas factory heat-conducting oil furnace tail gas safety treatment device which comprises a cooling assembly, a cyclone dust collector and a purification tower, the cyclone dust collector is sleeved with a cooling sleeve, and the cooling assembly is connected with the cyclone dust collector through a first conveying pipe; the cyclone dust collector is connected with the purification tower through a second conveying pipe, the cooling assembly comprises a tank body, a heat exchange coil pipe is arranged in the tank body, the heat exchange coil pipe comprises an outer pipe body and an inner pipe body, the inner pipe body is sleeved with the outer pipe body, and an interlayer flow channel is formed between the inner pipe body and the outer pipe body. According to the technical key points, tail gas is cooled through the cooling assembly and heat is recycled, most of dust particle impurities in the tail gas are removed through the cyclone dust collector, the tail gas is secondarily cooled through the cooling sleeve and heat is recycled, the dedusted gas enters the purification tower, harmful substances are removed, and the dedusted gas is cooled again. And the purified tail gas reaches the standard at low temperature and is discharged.

The utility model relates to the technical field of purification equipment, and particularly discloses oil fume purification equipment for deodorizing by utilizing ozone water, which can be applied to scenes needing oil fume purification and deodorization, such as industrial workshops, catering kitchens, garbage treatment stations and the like. When oil fume gas in the gas channel flows from bottom to top, the aeration module is started, the nozzle sprays ozone water towards the aeration net, the oil fume gas penetrates through the air holes of the aeration net from bottom to top, so that a layer of ozone water vapor bubble film is formed at the upper end of the aeration net, the oil fume gas penetrates through the ozone water vapor bubble film and is in much contact with the ozone water, and the ozone water is discharged out of the aeration net. Ozone water can decompose and remove odor molecules after contacting with the odor molecules in the oil fume gas, and finally, the oil fume gas discharged from the outlet of the case is nontoxic and odorless and meets the emission standard.

The invention relates to the technical field of accurate control scheme design for denitrification of a sewage treatment plant, in particular to an accurate control method and system for denitrification of a sewage treatment plant and electronic equipment. Data of carbon source concentration, dissolved oxygen concentration, pH value, temperature, alkalinity and nitrate concentration in sewage are collected in real time, parameters of a prediction model are dynamically corrected in combination with a machine learning algorithm and a mechanism model, and the denitrification rate is predicted. The carbon source adding amount and the dissolved oxygen target value are calculated according to the prediction result and the emission standard, the distribution of the carbon source and the dissolved oxygen in the reaction tank is monitored in real time through a distributed sensor network, and the operation states of a carbon source adding pump and aeration equipment are accurately adjusted through feedback control. According to the method, a pH value and alkalinity are taken as constraint conditions to cooperatively control a carbon source feeding rate and a dissolved oxygen concentration, and a control strategy is dynamically optimized through deep Q learning based on historical data and operation conditions, so that cross-cycle self-adaptive adjustment is realized, and accurate control on a denitrification process of a sewage treatment plant is realized.

The utility model provides a waste gas adsorption and purification treatment device, which belongs to the technical field of environmental protection equipment and comprises a treatment box body, an adsorption and purification component is mounted in the treatment box body, and an airflow regulation and control component is mounted on the adsorption and purification component. According to the utility model, the adsorption purification assembly is arranged, a three-stage progressive structure of a primary filter layer, an activated carbon adsorption layer and a molecular sieve purification layer is adopted, and a front-end oil mist separation net is matched, so that dust and oil mist particles can be intercepted stage by stage, organic waste gas, harmful gas and peculiar smell molecules are efficiently adsorbed, and the purification is thorough; the multiple layers of filter materials are mounted in a sliding groove plugging manner, so that disassembly, replacement and maintenance are convenient, and the use cost is reduced; waste gas can evenly penetrate through all the adsorption layers through the flow guide partition plates and the evenly-distributed flow guide through holes, airflow short circuit and local accumulation are avoided, the adsorption capacity of filter materials is fully utilized, the overall purification efficiency is improved, the service life is prolonged, and it is guaranteed that the waste gas reaches the standard to be discharged.

The invention relates to the technical field of hull valve machining, in particular to a hull valve multi-procedure integrated machining center which comprises a numerical control machine tool body, a connecting shell is fixedly connected to the rear end of the top of the numerical control machine tool body, and a numerical control milling device is arranged at the position, located in the connecting shell, of the top of the numerical control machine tool body. Compared with an existing integrated machining center, waste chips and waste gas generated in the milling process are effectively collected, the cleanliness of the working environment is kept, the machining efficiency and the machining quality are improved, the machining cost is reduced, and the machining efficiency and the machining quality are improved. According to the invention, damage of waste chips to equipment and workpieces is avoided, harmful substances in waste gas are effectively removed, the environment-friendly emission standard is reached, the overall practicability and the environment-friendly performance of the equipment are improved, stable clamping of cylindrical materials is realized, loosening or deviation in the machining process is prevented, the machining precision and efficiency are improved, and the production cost is reduced. And the processing quality is ensured.

The invention discloses a particulate matter resistance detection system based on high-voltage pulse self-cleaning and a control method, and relates to the technical field of diesel vehicle emission post-processing. A connecting wire harness comprises a high-voltage heat-resistant wire harness and a signal shielding wire which are respectively used for transmitting a high-voltage pulse signal, a resistance detection signal and a temperature acquisition signal; the sensor probe is connected with the controller module; the Baud rate of the CAN communication interface is 500 kbps, the CAN communication interface supports a UDS diagnosis protocol, can be connected into an OBD-II system and is used for transmitting a detection result to a whole vehicle ECU, and the control method comprises the processes of instantaneous high-voltage pulse cleaning, bias voltage adsorption, dynamic resistance monitoring, temperature compensation and result output. According to the invention, the cleaning time is less than 1 second, the single detection period is less than or equal to 60 seconds, the service life of the sensor is prolonged to more than 5 years, the energy consumption is less than or equal to 1.8 W, the distance between electrodes reaches 10-50 microns, and the temperature detection deviation is + / -0.2 DEG C, so that the requirement on real-time monitoring of a diesel particulate filter (DPF) in national sixth and above emission standards can be met.

The application discloses a composite air filtering device, which comprises a centrifugal filtering mechanism, a second filtering element, a microorganism filtering mechanism, an ultraviolet mechanism and a self-adaptive adjusting mechanism, wherein the self-adaptive adjusting mechanism comprises an adjusting filtering layer, and the pore size of the adjusting filtering layer can be adjusted according to the air flow rate; air flows through the centrifugal cylinder, the glass fiber filtering core, the activated carbon, the microorganism layer, the ultraviolet irradiation unit and the adjusting filtering layer in sequence from the air inlet pipeline; and the control module adjusts the pore size of the adjusting filtering layer according to the air filtering standard and the air flow rate; after the multiple purification steps, the particulate matters, gas pollutants, microorganisms and peculiar smell in the air are effectively removed, the air finally discharged into the environment is fresh, peculiar smell-free and harmful substance-free, meets the environmental protection discharge standard, and remarkably improves the air quality, providing clean and safe air for the environment.

The invention discloses a flue gas purification device of a strip steel hot galvanizing aluminum magnesium annealing furnace, which relates to the technical field of flue gas purification and comprises an annealing furnace exhaust pipe, a quenching treatment unit, a multi-stage purification unit, an exhaust pipe and a circulating liquid system which are sequentially connected along a flue gas flowing direction. According to the invention, through the multi-stage and synergistic purification process of quenching, toxin inhibition and deacidification, turbulent flow enhanced absorption, ultrasonic deep washing, efficient dehydration and demisting and activated carbon adsorption, and in combination with an intelligent fractional precipitation circulating liquid system, efficient, deep and comprehensive purification of the complex flue gas of the strip steel hot-dip galvanizing aluminum magnesium annealing furnace is realized, the pollutant emission concentration is remarkably reduced, and the environmental pollution is reduced. Meanwhile, waste liquid treatment and resource recovery are optimized, the operation cost and the environmental risk are reduced, and the environment-friendly emission standard is achieved.

This invention provides a fuel injection method for an engine, an engine, a vehicle, and a computer-readable storage medium, relating to the field of vehicle exhaust emission control technology. The fuel injection method provided by this invention includes the following steps: Before the engine reaches a stable idle speed, fuel is injected at a preset fuel pressure during the first intake stroke and the first compression stroke of each working cycle, wherein the fuel injection mass ratio of the first intake stroke to the first compression stroke is greater than 4:1, and the preset fuel pressure ranges from 20 to 50 MPa. When the engine speed is at a stable idle speed, fuel is injected during the second intake stroke and the second compression stroke of each working cycle at a preset fuel pressure, wherein the fuel injection mass ratio of the second intake stroke to the second compression stroke is greater than or equal to 4:1. This method ensures that the vehicle's exhaust emission level meets the requirements of Euro 6 emission standards without requiring a particulate filter, thus optimizing the engine's original emissions.

The utility model provides a waste cracking tail gas treatment device. The waste cracking tail gas treatment device comprises a bag-type dust collector, a washing tower, a desulfurizing tower, a dry filter and an activated carbon device, the waste cracking tail gas enters the bag-type dust collector from a gas inlet of the bag-type dust collector, a gas outlet of the bag-type dust collector is communicated with a gas inlet of the washing tower, a gas outlet of the washing tower is communicated with a gas inlet of the desulfurizing tower, a gas outlet of the desulfurizing tower is communicated with a gas inlet of the dry filter, and a gas outlet of the dry filter is communicated with a gas inlet of the activated carbon device. Heavy metal substances such as mercury in the tail gas are removed through the washing tower and the activated carbon device, so that the problem that the mercury content of the tail gas discharged into the atmosphere exceeds the standard is solved; intercepting particulate matters in the tail gas through filtering equipment such as a bag-type dust collector and a dry filter; pollutants such as acidic substances, nitrogen oxides and carbon monoxide in the tail gas are removed through the desulfurization tower, the carbon monoxide removal device and the oxynitride treatment device, and finally the tail gas reaches the standard and is discharged.

The application discloses a kind of garbage incineration flue gas treatment's purification discharge analysis management system, it is related to garbage incineration flue gas purification technical field, still exist in garbage incineration flue gas purification discharge process after flue gas purification directly discharges, cannot accurately analyze flue gas, leading to flue gas cannot be handled in stages, and further reduce the efficiency of flue gas treatment purification;Including data acquisition unit, garbage analysis unit, flue gas analysis unit, flue gas processing unit and management terminal;By comparing and analyzing the flue gas components generated by garbage incineration and the concentration of each component with the local flue gas emission standard value and the sieve level purification treatment threshold of each stage flue gas purification module, the n flue gas purification modules are divided into three sets of different levels of flue gas purification efficiency, the purification discharge analysis management of garbage incineration flue gas treatment is realized, and the efficiency level of each stage flue gas purification module is obtained by analyzing and modeling the front and rear stage flue gas information, to realize the online management of flue gas purification module.

The utility model relates to a flue gas treatment system and a graphitization furnace. The flue gas treatment system comprises a cooling tower which is communicated with a flue gas outlet of the graphitization furnace and is used for cooling initial flue gas; the incinerator communicates with a flue gas outlet of the cooling tower and is used for combusting flue gas discharged by the cooling tower; and the secondary treatment equipment communicates with a flue gas outlet of the incinerator and is used for recycling heat of the first flue gas discharged by the incinerator and purifying the first flue gas. According to the flue gas treatment system, through cooperative arrangement of the cooling tower, the incinerator and the secondary treatment equipment, the probability that functional parts in the incinerator and the secondary treatment equipment are damaged due to the too high temperature of flue gas can be reduced. And meanwhile, the difficulty of heat recovery and purification of the flue gas by secondary treatment equipment at the rear end can be reduced. Therefore, the purification effect of the secondary treatment equipment at the rear end on the flue gas is improved, the flue gas exhausted from the tail end meets the emission standard, and the pollution to the environment is reduced.

A plastic gasoline tank comprises a tank body, a carbon tank support, a gasoline filter support, an oil pump installation chuck and a plastic oil filling pipe, the plastic oil filling pipe is of a built-in structure, and the plastic oil filling pipe and the tank body are fixed in a hot melting welding mode. The plastic oil filling pipe is sequentially provided with an ICV valve structure, an assembly part, a welding part and a threaded part which are communicated and connected with one another from inside to outside, the inner end of the welding part and the box body are fixed through hot melting welding, the ICV valve structure and the assembly part are located in the box body, and the threaded part is connected to the outer end of the welding part through hot melting welding. The oil filling pipe built-in structure and the six-layer box body are welded in a hot melting mode, the leakage problem caused by poor connection of a traditional external oil filling pipe is avoided, and the requirement of the emission standard is met through the ICV valve structure and the optimized oil filling pipe design.

The utility model discloses a high-power pure vaporizer, and belongs to the technical field of fuel supply of gas engines. The engine comprises a body, a throat pipe, a throttle valve, a variable frequency motor, an air inlet cavity and a multi-channel air inlet structure (a high-speed air inlet channel, a medium-speed air inlet channel and a low-speed air inlet channel). Through the caliber gradient design (high speed > medium speed > low speed) of each channel and outlet position optimization (high speed is in the middle, the medium speed is close to the lower part and the low speed is close to the upper part), and in combination with a throttle valve and a limiting adjusting mechanism driven by a variable frequency motor, dynamic adjustment of gas flow under different working conditions is realized, the mixing efficiency is improved, the energy consumption is reduced, and the emission standard is met.

The invention discloses a blow-in flue gas treatment method for a zinc smelting roasting furnace, and belongs to the technical field of zinc smelting flue gas treatment. Comprising the steps that smoke gate valves are additionally arranged at smoke outlets of the waste heat boiler; a blow-in flue and a gate valve are additionally arranged at a smoke outlet of the waste heat boiler; a frequency conversion centrifugal fan is newly arranged at the tail of the flue; a set of venturi tower is newly built on the side edge of the blow-in fan, and a spraying device is additionally arranged on the venturi tower. By additionally arranging the blow-in flue gas collecting system, flue gas generated in the blow-in stage is intensively captured and then subjected to gas-liquid two-phase turbulence washing through the efficient Venturi tower, and smoke dust pre-removal and temperature regulation and control are achieved; afterwards, the washed flue gas is introduced into an original tail gas desulfurization tower, sulfur dioxide and trace heavy metal pollutants are removed in a graded mode through the synergistic effect of a sodium hydroxide solution and zinc oxide, and finally flue gas purification and up-to-standard emission are achieved. According to the scheme, through coupling of a new system and an old system, original desulfurization facilities are reused, the investment cost is reduced, and the consistency of the blow-in stage and the normal production emission standard is ensured.

This invention discloses a wet multi-stage cyclone dust collector, comprising a primary volute and a secondary volute connected vertically, with a partition between them. The primary volute's sidewall is connected to an inlet chamber, and its bottom is connected to a dust hopper. A water pipe and a fish-scale atomizing plate are installed in the inlet chamber. A primary separation cylinder is vertically installed inside the primary volute, passing through the partition and connecting to the secondary volute. The dust-laden airflow enters the secondary volute through the primary separation cylinder, achieving the first separation of water vapor and dust particles from the airflow. A secondary separation cylinder is horizontally installed inside the secondary volute, with one end positioned at the tail of the secondary volute and the other end connected to a centrifugal fan. Under centrifugal force, water vapor and dust particles are separated from the airflow a second time, and the final airflow is discharged from the centrifugal fan in compliance with emission standards. This invention realizes the application of wet methods in cyclone dust collectors, improving the dust removal efficiency of cyclone dust collectors, enhancing the ability to treat dust particles with a diameter below 10μm, while solving the problem of large size in multi-stage cyclone dust collectors, increasing equipment adaptability, and extending service life.

The invention discloses filtering equipment for producing polyethylene glycol and a filtering method thereof.The filtering equipment for producing polyethylene glycol comprises a rectangular shell, a cover plate is arranged at the top of the rectangular shell, a waste liquid pipe is fixedly installed at the bottom of the right side of the rectangular shell, and a liquid inlet pipe is fixedly installed on the right side of the rectangular shell; a waste gas pipe is arranged on the left side of the rectangular shell; an exhaust pipe is fixedly mounted at the top of the cover plate; the right side of the rectangular shell is provided with three groups of filtering mechanisms and dismounting mechanisms which are arranged at equal intervals, the filtering mechanisms are matched with the dismounting mechanisms, and each filtering mechanism comprises a filtering plate, a sealing insertion frame, two fixing blocks, two butt joint fixing frames and a reset spring. When the waste gas is discharged, dust can be filtered out by clean water in the rectangular shell, and then the waste gas is filtered by a plurality of filter plates on the inner side of the rectangular shell, so that the emission standard is met, and the health of workers is prevented from being harmed.

The application discloses an anti-blocking high-concentration VOCs recovery device, which comprises an anti-blocking VOCs pre-condensation module, an activated carbon adsorption and purification module and an anti-blocking VOCs closed recovery module; the anti-blocking VOCs pre-condensation module is fixedly connected with the activated carbon adsorption and purification module; and the activated carbon adsorption and purification module is fixedly connected with the anti-blocking VOCs closed recovery module. The anti-blocking VOCs pre-condensation module can recover most of VOCs, and is provided with a device for preventing liquid icing and blocking; the remaining non-condensable gas is adsorbed and purified by the activated carbon adsorption and purification module; the anti-blocking VOCs pre-condensation module at the front end of the whole device not only recovers most of VOCs, but also reduces the adsorption burden of the activated carbon adsorption and purification module; the activated carbon adsorption and purification module at the rear end ensures that the VOCs concentration of exhaust gas meets the emission standard; and the saturated activated carbon is regenerated and VOCs are recovered by the anti-blocking closed VOCs recovery module.