330 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 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 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 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 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 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.

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 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.

The present application relates to a kind of ammonia nitrogen temperature homologous state under denitration real-time monitoring method and equipment thereof, the present application discloses homologous state under denitration real-time monitoring method and equipment, the present application is integrated by encapsulation ammonia nitrogen temperature homologous integrated measuring point, realize the synchronous collection of flue gas ammonia concentration, nitrogen oxide concentration, flue gas temperature in the same spatial position, after nonlinear temperature drift correction based on same point real-time temperature, construct "static base quantity+dynamic increment+adaptive correction" three-level ammonia injection amount calculation logic, complete closed-loop monitoring loop is formed by collocation grid partition control.This application eliminates sampling inherent error from source, can quickly respond to working condition change, give consideration to nitrogen oxides emission standard and ammonia escape control, effectively reduce ammonia consumption and operation risk, improve the stability and economy of denitration system operation, adapt to industrial denitration long-period continuous operation demand.

The utility model provides a desulfurization and denitrification flue gas recycling device, which relates to the technical field of flue gas recycling and comprises a boiler body, one end of the boiler body is fixed and communicated with a flue gas inlet pipe, one side of the boiler body is provided with a water pump, and the output end of the water pump is fixedly connected with a water inlet pipe. And the other end of the water inlet pipe fixedly communicates with the boiler body, and the surface of the water pump fixedly communicates with a connecting pipe. In the utility model, a large amount of water vapor (generated by combustion of H in fuel) in flue gas can release a large amount of condensation latent heat after water vapor condensation, after the condensation heat exchanger is installed, the exhaust gas temperature can be reduced to below 100 DEG C, sensible heat in the flue gas and latent heat emitted after water vapor condensation are absorbed, and the heat efficiency of the boiler is improved to more than 95%; meanwhile, in the condensation and dewing process of water vapor in the flue gas, harmful gas such as NOX and SOX in the flue gas is absorbed, harmful gas in emissions is greatly lower than the national emission standard, meanwhile, fuel is saved, and annual CO2 emission of a user is reduced.

A recovery treatment method for ammonia-containing tail gas in the later stage of aromatic nitrile synthesis. The method comprises: introducing the ammonia-containing tail gas sequentially into a first spray absorption tower and a second spray absorption tower; absorbing, in a liquid phase, ammonia from the ammonia-containing tail gas to realize the recovery of ammonia; and directly discharging exhaust gas; an absorbent A in the first spray absorption tower is water; and an absorbent B in the second spray absorption tower comprises glycolic acid, vinylphosphonic acid and aluminum sulfate. In the method, the recovery of ammonia from the ammonia-containing tail gas is increased by means of two-stage spraying, and the ammonia content in the treated tail gas is low and satisfies emission standards.

The utility model discloses a gas treatment device after gas pressure protection and safety pressure relief of an excimer laser, which comprises a rupture disk device (1) with one end capable of being communicated with a resonant cavity of the excimer laser. The other end of the rupture disk device (1) is provided with a one-way safety valve (2) which can be jacked open by working gas leaked from the resonant cavity when a diaphragm (14) of the rupture disk device (1) is ruptured, and the one-way safety valve (2) is connected with an absorption device (3) which can purify the leaked working gas; and the absorption device (3) is provided with an exhaust port (4) capable of exhausting purified gas. According to the utility model, the structure is simple, external air can be prevented from flowing backwards into the excimer laser, the internal gas is kept pure, the discharged gas is absorbed and purified, so that the discharged gas can reach the emission standard, and the harm to workers and the environment is eliminated.

The invention discloses a photocatalytic reduction low-temperature degradation system and method for dioxin in waste incineration flue gas. The system comprises a flue gas pretreatment unit, a photocatalytic reduction reactor, a waste heat recovery unit and a tail gas emission unit which are connected in sequence; the photocatalytic reduction reactor is internally provided with a composite photocatalytic material layer, the composite photocatalytic material layer is composed of a TiO2 nanotube loaded CeO2-ZrO2 composite oxide, the inner wall of the reactor is provided with an ultraviolet LED array light source with the wavelength of 254-365 nm, and the outer part of the reactor is provided with a low-temperature circulating water heat exchange device, so that the reaction temperature is maintained at 150-250 DEG C. According to the invention, the reaction temperature is maintained at 150-250 DEG C; according to low-temperature efficient degradation and energy consumption optimization, on the basis of the low-temperature characteristic of an anaerobic carbonization technology in a document, a dioxin generation path is blocked in combination with a chlorine conveying reduction technology, the system achieves efficient decomposition of dioxin in a low-temperature interval of 150-250 DEG C, energy consumption is reduced by 30% or above compared with a traditional incineration technology, and the five-zero emission standard can be achieved without high-temperature catalysis.

This invention relates to a microwave combustion exhaust gas treatment device, comprising: an ignition tube, a combustion tube, a resonant housing, and a microwave generator. The microwave generator is fixedly connected to and communicates with the resonant housing, the resonant housing is fixedly connected to and communicates with the ignition tube, and the lower part of the ignition tube is fixedly connected to and communicates with the combustion tube. When treating small-flow exhaust gas, this invention allows the microwave generator to be used alone, saving energy and reducing costs. When treating larger-flow exhaust gas, the combined microwave and combustion treatment provides greater processing capacity, and the energy consumption and cost of combined treatment are lower than using natural gas combustion alone, thus reducing the energy consumption and cost of exhaust gas treatment. When the microwave generator malfunctions or other external microwave malfunctions occur, the exhaust gas flow into the ignition tube and combustion tube increases. By increasing the amount of natural gas and air, the emergency exhaust gas treatment capacity is improved, preventing the exhaust gas from being untreated and causing harmful components to exceed emission standards.

The present application relates to the technical field of combustion equipment, and particularly relates to a rotary backflow carbon and steam co-production low-nitrogen combustion equipment and a combustion method, which comprises a combustion furnace assembly, a cracking carbonization furnace and a heat exchanger, the cracking carbonization furnace is connected with a carbonization tail gas recovery pipeline and a cracking gas delivery pipeline, and the combustion furnace body of the combustion furnace assembly is connected with the output ends of the carbonization tail gas recovery pipeline and the cracking gas delivery pipeline; the combustion furnace body is internally provided with a first-stage combustion zone and a second-stage combustion zone, and the first-stage combustion zone is located in front of the second-stage combustion zone. x The present application generates the source of NO x xidation (NO x ) emission without relying on complex end denitration equipment, and easily meets the environmental protection emission standard; meanwhile, the carbonization tail gas and the boiler tail gas are both used in the system, so that the amount of directly discharged tail gas is reduced.

The invention provides microalloyed high-modulus high-strength nodular cast iron which comprises the following components: 2.8-3.0% of C, 4.0-4.3% of Si, 0.3-0.5% of Mn, 0.7-1.0% of Cr, 0.5-0.6% of Mo, 1.2-1.5% of Ni, 0.8-0.9% of Cu, 0.1-0.3% of V, 0.01-0.05% of Re, less than or equal to 0.03% of S, less than or equal to 0.05% of P and the balance of iron, and (Ni + Cu) / (Cr + V) is more than or equal to 2.0 and less than or equal to 2.5. The nodular cast iron still keeps the tensile strength larger than or equal to 88 MPa and the high modulus characteristic at the high temperature of 820 DEG C. The material has the advantages of being low in alloy cost, stable in high-temperature performance and good in structural rigidity, and is suitable for high-temperature heat-resistant components such as engine exhaust manifolds under the national sixth emission standard, and the invention further provides a preparation method of the microalloyed high-modulus and high-strength nodular cast iron.

The utility model discloses a treatment system for residual liquid and waste gas after cleaning of a tank car, which comprises a base for supporting the tank car; the air pipe is communicated with an air inlet of the tank car; the gas collecting hood is communicated with a gas phase valve of the tank car and is respectively provided with an unorganized waste gas branch pipe, a low-concentration waste gas branch pipe, a high-concentration waste gas branch pipe and an acidic waste gas branch pipe; the cooling and dehumidifying unit is communicated with the unorganized waste gas branch pipe and the low-concentration waste gas branch pipe; the cryogenic dehumidification unit is communicated with the high-concentration waste gas branch pipe and the cryogenic recovery device; the alkali washing unit is communicated with the acid waste gas branch pipe and the cooling and dehumidifying unit; and the tail gas treatment device is communicated with the cooling and dehumidifying unit and the cryogenic recovery device. By means of the unorganized waste gas branch pipe, the low-concentration waste gas branch pipe, the high-concentration waste gas branch pipe and the acid waste gas branch pipe which are arranged on the gas collecting hood, tank trucks containing different chemical medium types are cleaned and then subjected to tail gas dehumidification and cooling pretreatment, then tail gas aftertreatment and up-to-standard emission are conducted, the range of treatment media is wide, and tail gas treatment meets the environment-friendly standard.

The silencer comprises a shell, a partition plate is arranged in the shell, a silencing cavity is formed by the partition plate and the shell, the shell is further provided with an air inlet channel extending into the silencing cavity, a catalyst assembly is arranged in the silencing cavity, and the outlet end of the air inlet channel is connected with the catalyst assembly; wherein an air flow mixing piece for mixing air flow exhausted by the air inlet channel is arranged in the air inlet channel. Waste gas and fresh air are forcibly mixed and diffused by utilizing the airflow mixing piece, so that the waste gas can uniformly enter a catalyst when reaching the catalyst, the utilization rate of the catalyst is also improved, the purification effect of the waste gas is ensured, and the emission standard with higher requirements can be met. The invention further discloses an engine comprising the silencer.