3467 results about "Coal gas" patented technology

The invention relates to the technical field of data processing, and discloses a carbon emission accounting and evaluation method and system for the coking industry. The method comprises the following steps: collecting coal coke data through analysis equipment to establish a parameter library; measuring the carbon content of the material to form a material table; analyzing the gas flow direction and drawing a carbon element flow diagram; generating an intensity distribution table in combination with the emission data; comparing actual and theoretical emission identification key points; and generating an emission reduction scheme based on a key point regulation and control process. According to the method, the key points of the carbon emission are accurately identified, and a targeted emission reduction technical scheme is provided based on correlation analysis of the process parameters and the carbon emission, so that fine management and effective emission reduction of the carbon emission of coking enterprises are realized.

The invention provides an iron and steel enterprise high-salt wastewater and high-salt solid waste collaborative resource utilization system which is characterized in that firstly, non-magnetic fly ash in sintering machine head fly ash is screened out through a pretreatment module; carrying out multi-stage washing and filter pressing treatment on slurry obtained by mixing the non-magnetic dedusting ash, the blast furnace gas condensate water and the strong brine of the desalting water station through a multi-stage washing and filter pressing module to obtain multi-stage washing ash and multi-stage ash washing brine; finally, carrying out purification and separation treatment on the multi-stage ash washing brine through a purification and separation module to obtain industrial-grade NaCl, industrial-grade KCl and devitrification mother liquor; according to the method, non-magnetic fly ash, blast furnace gas condensate water and strong brine of a desalting water station are used as raw materials, the problem of enrichment of alkali metal and chloride ions in a sintering machine system is solved through a series of co-processing technologies, and meanwhile industrial-grade NaCl and industrial-grade KCl are extracted from the blast furnace gas condensate water and the strong brine of the desalting water station. Therefore, the resource utilization rate is improved, and benefits are increased for iron and steel enterprises.

The invention provides a smelting method for improving the stability of a blast furnace under the condition of high gas utilization rate, which comprises the following steps: step 1, using a bell-less furnace top, and preparing charging materials in a tank combination manner, the charging materials comprising coke and ore; step 2, annularly distributing the coke and the ore at a preset angle position in the blast furnace by adopting a simultaneous loading and distributing method; and step 3, keeping the gas utilization rate at 48-54.0%, carrying out blast furnace smelting, dynamically adjusting the oxygen enrichment amount and the coal injection amount of the blast furnace according to the furnace building condition, dynamically adjusting the fuel ratio or the air volume of the blast furnace according to the gas utilization rate decreasing condition, and dynamically adjusting the coal injection amount or the clean coke of the blast furnace according to the stockline decreasing condition. By accurately controlling the ore coke distribution gradient, forming a coal gas flow structure with heavy loads on the edge and an open center, the pressure difference in the furnace can be stabilized through linkage adjustment of the oxygen enrichment amount and the coal injection amount, the fuel ratio / air volume dynamically adjusts and compensates a heat notch, furnace temperature fluctuation is avoided, and the activity of the hearth is rapidly recovered according to the stockline abnormity, the coal injection or net coke supplement strategy.

The invention discloses a coal-bed gas well productivity evaluation method based on artificial intelligence, and the method comprises the steps: collecting the production data of an existing coal-bed gas well, carrying out the preprocessing of the production data and basic data, inputting the basic data into a coal-bed gas well production condition prediction model, and obtaining the predicted production data, comparing the predicted production data with actual production data to obtain an actual-to-actual proportion, performing influence analysis on the basic data according to a change correlation degree to obtain a predicted change coefficient, and constructing a production capacity function according to the actual-to-actual proportion and the predicted change coefficient, and constructing a coal-bed gas well productivity prediction model according to the production capacity function, optimizing the coal-bed gas well productivity evaluation model, inputting to-be-evaluated data into the coal-bed gas well productivity evaluation model, and outputting an evaluation result. The method not only can improve the precision of coal-bed gas well productivity evaluation based on artificial intelligence, but also has good interpretability, and can be directly applied to coal-bed gas well productivity prediction of field production.

The invention provides a method for preparing aerogel by using high-carbon components in coal gas fine slag, which is characterized in that the high-carbon components with ash content lower than 30% in the coal gas fine slag are separated into light carbon and heavy carbon through an isodensity gradient centrifugation or ultrasonic separation technology. The light carbon is subjected to acid leaching impurity removal to obtain a carbon precursor, and then carbon aerogel is synthesized through a chemical activation method; the preparation method comprises the following steps: carrying out oxidation stripping on heavy carbon by using strong acid to obtain graphene oxide, then carrying out alkali activation for reduction, and finally carrying out acid pickling to obtain the graphene aerogel. The composition structural characteristics of the coal gasification fine slag residual carbon are fully utilized, and the preparation of the high-performance aerogel is realized through refined separation and treatment. According to the method, the resource utilization rate of the coal gasification fine slag can be increased, and a new path is provided for preparation of a high-added-value carbon material.

The invention relates to the technical field of coal gas molten salt heat storage, and discloses a steel mill coal gas molten salt heat storage system and a heat storage operation method and device.According to the coal gas molten salt heat storage system, a coal gas combustion unit adjusts heat power to output flue gas; the high-temperature heat exchange unit and the combustion unit are integrated, and fused salt is heated to the target temperature; the flue gas waste heat exchange unit uses waste heat flue gas flowing out of the high-temperature heat exchange unit as a heat source to heat low-temperature fused salt to medium temperature; the molten salt flow mixing unit realizes high-temperature molten salt flow division backflow and closed-loop circulation; the closed-loop control system dynamically adjusts the backflow proportion and the combustion power based on real-time data to ensure stable and efficient operation of the system, the problems that a blast furnace gas heat source is unstable, temperature rise of molten salt is limited and an existing system lacks dynamic control are solved, safe operation of the system is guaranteed, the service life of equipment is prolonged, and the energy utilization efficiency is further improved. And stable fused salt temperature output and energy efficiency optimization are realized.

The present invention belongs to the technical field of desulfurization activated carbon regeneration, and relates to a blast furnace gas desulfurization activated carbon regeneration process and device, the regeneration device includes a washing and extraction tank, a regeneration reactor, a gas detection and analysis system, an automatic control system, a temperature monitoring system, and a deoxygenation reactor; the regeneration process includes S1, washing and extraction, S2, heating regeneration: according to the sulfur content of the outlet gas of the regeneration reactor, the heating temperature is adjusted by gradient, and the temperature range of the regeneration reactor is controlled: 150-300°C, and the temperature gradient is 30-50°C; S3, gas circulation, air oxidation, so that elemental sulfur is precipitated from polysulfide. The regeneration process of the present invention has a small carbon loss rate, increases the number of regenerations, and further reduces costs; the temperature of the thermal regeneration process is 150-300°C, the regeneration temperature is low, and the regeneration temperature can be adjusted according to the outlet gas concentration gradient, reducing energy consumption, and at the same time ammonia resources can be recycled, reducing the amount of solution used and the amount of waste liquid discharged, and the regeneration process can obtain elemental sulfur with economic value.

The utility model discloses movable blast furnace gas desulfurization equipment which comprises a shell which is vertically arranged on the whole, a filler flow channel is vertically arranged in the shell, a feeding device is arranged at the upper end of the shell and connected with the upper end of the filler flow channel, a discharging device is arranged at the lower end of the shell and connected with the lower end of the filler flow channel, and a gas flow channel is further arranged in the shell. The lower end part of the shell is provided with a gas inlet interface which is connected with the coal gas flow channel, and the upper end part of the shell is provided with a gas outlet interface which is connected with the coal gas flow channel. The utility model further discloses a blast furnace gas fine desulfurization system obtained by connecting three devices in series. The device has the advantages of high desulfurization treatment efficiency, high filler utilization rate, more convenient control of the reaction process, better safety and the like.

The present invention provides a method and apparatus for predicting the temperature of molten iron in blast furnace smelting, an electronic device, and a storage medium. The method comprises: acquiring original fuel parameters, blast parameters, coal gas blowing parameters, furnace top coal gas parameters, and slag iron parameters in a blast furnace smelting process; on the basis of the original fuel parameters, the blast parameters, and the coal gas blowing parameters, determining the furnace bosh coal gas amount, the furnace bosh coal gas component, and the theoretical coal gas combustion temperature at a tuyere rotation area; determining the direct reduction degree of iron ore on the basis of the furnace top coal gas parameters, the slag iron parameters, the furnace bosh coal gas amount, and the furnace bosh coal gas component; determining a gas-liquid heat exchange coefficient on the basis of the theoretical coal gas combustion temperature, the furnace bosh coal gas component, the slag iron parameters, and the coal gas component after direct direction; and on the basis of the gas-liquid heat exchange coefficient, the direct reduction degree of iron ore, the theoretical coal gas combustion temperature, and the slag iron parameters, performing iterative solution of the molten iron temperature and the coal gas temperature, so as to complete prediction of the temperature of molten iron in the blast furnace smelting. The accuracy of molten iron temperature prediction can be improved, and a good basis is provided for blast furnace smelting control, ensuring stable and smooth operation of a blast furnace.

The invention relates to the technical field of industrial flue gas purification, and discloses a desulfurization control method based on blast furnace gas sulfur concentration prediction, which comprises the following steps: step 1, acquiring real-time sulfur concentration, flow velocity, temperature, pressure and current desulfurizer feeding rate of blast furnace gas, denoising and normalizing acquired data, and storing the data in a database; step 2, based on the blast furnace gas sulfur concentration convection-diffusion model and the reaction rate equation, constructing a physical constraint prediction model in combination with a long-short term memory network, and outputting future predicted sulfur concentration; and 3, predicting a result based on the sulfur concentration. According to the method, the physical constraint prediction model based on the long and short term memory network is adopted, the technical effect of accurately predicting the sulfur concentration of the blast furnace gas is achieved, and compared with a prediction method purely based on experience or a traditional time sequence model in the prior art, the defects of low prediction precision and poor generalization ability under complex working conditions are overcome.

The utility model discloses a coal gas purification tower device and relates to the technical field of purification treatment equipment. A water tank is arranged at the bottom end of the tower body, the water tank is communicated with the tower body, a filter screen is arranged between the water tank and the tower body, a circulating pump is mounted on the water tank, the water inlet end of the circulating pump is connected into the water tank through a pipeline, a steel water conveying pipe is mounted in the tower body through a bearing, and spray heads are distributed on the steel water conveying pipe; according to the coal gas purification tower device, a two-layer water distribution mode is adopted, rotary spraying is arranged, the spraying pipe automatically rotates in the water spraying process, water mist can be uniformly sprayed into the tower body, the spraying range can be expanded, all-directional coverage is achieved, spraying is free of dead angles, the contact area between gas and liquid is increased, the mass transfer efficiency is further improved, and the gas purification tower device is suitable for large-scale popularization and application. The purification efficiency of equipment can be improved, meanwhile, a cleaning liquid real-time circulating filtering system is arranged, the utilization efficiency of liquid is improved, the working efficiency is high, and the performance is stable and reliable.

The utility model belongs to the technical field of heat exchange, and particularly relates to novel heat exchange equipment in a blast furnace gas ammonia synthesis process, which comprises a base, a machine body fixedly connected to the top of the base, and a supporting plate welded to an inner cavity of the machine body; the exchange pipe is fixedly connected with a flange; the bracket structure comprises a supporting rod fixedly connected to the top of the base, the outer ring of the supporting rod is fixedly connected with a spring support, and the outer end of the spring support is connected with a temperature measuring assembly. The temperature in each section of the exchange tube can be detected through the temperature measuring assembly, whether the exchange tube is blocked or not is judged according to the temperature, and through the modularized exchange tube, the area where problems occur can be conveniently and accurately disassembled.

The utility model provides a waste liquid treatment device for coal gas desulfurization, belongs to the technical field of wastewater treatment, and aims to solve the problems that only part of suspended solids can be removed or the pH value can be adjusted during desulfurization wastewater treatment in the prior art, and collaborative removal of pollutants such as sulfides, ammonia nitrogen, heavy metals and the like cannot be realized. The device comprises a waste liquid pool, a reaction tank, a decomposition tank and an ultrafilter which are sequentially communicated through communicating pipes, the waste liquid pool is connected with a liquid inlet pipe and is internally provided with a filter plate with filter holes, a first stirring shaft with stirring blades driven by a first motor is arranged in the reaction tank, the top of the reaction tank is connected with a liquid adding pipe, a second stirring shaft with stirring blades driven by a second motor is arranged in the decomposition tank, one side of the decomposition tank is provided with an air blower connected with the decomposition tank through an oxygen supply pipe, and the top of the decomposition tank is connected with an exhaust pipe. The device realizes full-flow treatment of waste liquid, the filter plate removes large impurities to prevent blockage, stirring promotes chemical reaction, oxygen supply and stirring improve microbial activity, the ultrafilter ensures effluent quality, efficient and continuous treatment can be realized, and pollution is reduced.

The invention belongs to the technical field of heating furnaces, and particularly relates to an oxygen-enriched combustion system and method for a coal gas single heat storage type heating furnace. Comprising an oxygen pressure regulating branch, a first heating section oxygen lance oxygen injection branch and a main pipe oxygen enrichment branch, the oxygen pressure regulating branch is provided with a pressure transmitter and a temperature transmitter, an oxygen source is communicated with the pressure transmitter and the temperature transmitter through a pipeline, and oxygen flows into the first heating section oxygen lance oxygen injection branch and the main pipe oxygen enrichment branch after being subjected to pressure regulation through a pressure valve. A flow control valve is arranged on the first heating section oxygen lance oxygen injection branch, oxygen is fed into the heating furnace, and the main pipe oxygen enrichment branch feeds enriched oxygen into the main pipe through an enriched oxygen distributor. Flexible switching of different oxygen enrichment modes of the heating furnace is achieved, the burner in the oxygen lance oxygen injection branch of the first heating section is not reversed, total-oxygen combustion of the burner is achieved, under the oxygen enrichment branch of the main pipe, oxygen is conveyed to the main pipe through the oxygen enrichment distributor through the other branch to be mixed with combustion air, and total-furnace oxygen enrichment combustion is achieved.

The invention discloses a medium and low temperature organic sulfur hydrolytic agent applied to coal gas dry purification and a preparation method thereof, and relates to the technical field of coal gas purification and industrial catalysis, the hydrolytic agent comprises the following components: gamma-Al203, pseudo-boehmite, a pore forming agent, an active agent, an auxiliary agent, an adhesive and water. According to the medium-low temperature organic sulfur hydrolytic agent applied to dry purification of coal gas and the preparation method thereof, an alkali metal element is adopted as an active agent, and the characteristic that the alkali metal element can provide a large number of alkaline reaction sites is utilized, so that organic sulfur molecules are promoted to be preferentially adsorbed with the hydrolytic agent to generate hydrolysis reaction; meanwhile, sodium metavanadate is added as an active auxiliary agent, so that the low-temperature activity of the hydrolysis catalyst is further optimized.

The invention belongs to the technical field of metallurgical industry gas resource utilization, and particularly relates to a method and system for preparing synthesis gas from blast furnace gas. The method comprises the steps that a CO2 adsorbent is heated to the first temperature to conduct CO2 adsorption on blast furnace gas, the adsorbent after CO2 adsorption is obtained, the CO2 adsorbent is CaO, and the first temperature is smaller than or equal to 650 DEG C; the adsorbent after CO2 adsorption is heated to a second temperature for CO2 desorption, obtained CO2 and H2 are catalyzed by a copper-based catalyst under the second temperature condition to be subjected to a reverse water-gas shift reaction, synthesis gas is obtained, and the second temperature is higher than or equal to 700 DEG C. The method provided by the invention realizes effective separation and conversion of carbon dioxide in blast furnace gas to obtain a synthesis gas product, thereby realizing closed cycle of carbon resources, remarkably improving the economical efficiency of blast furnace gas, and realizing efficient utilization of energy.

The invention discloses a method for calculating the hot lag time of tuyere blowing coal gas of a hydrogen-carbon-rich circulating oxygen blast furnace, which comprises the following steps of: calculating the hot lag time of tuyere blowing high-temperature upgraded coal gas according to the blank volume of the hydrogen-carbon-rich circulating oxygen blast furnace, the time required by each batch of materials, the volume between the lower part of a furnace body and the central line of a tuyere and a smelting period; and according to the heat lag time and the smelting period of the tuyere injection decarburized gas, the adjustment time of the tuyere injection decarburized gas is confirmed, and finally an operation basis is provided for furnace heat adjustment of the hydrogen-rich carbon circulation oxygen blast furnace. According to the method, the problem that the furnace heat adjusting time is difficult to determine due to the heat hysteresis of the tuyere blowing gas of the hydrogen-rich carbon circulating oxygen blast furnace is solved.

The invention discloses a multi-fuel combustion gas boiler coupling biomass direct combustion power generation method, and belongs to the field of biomass utilization. According to the method, after basic characteristics, combustion characteristics and dynamic characteristics of fuel are analyzed, a numerical model is established; then, calculating the numerical model of the blending combustion biomass fuel, and determining the optimal biomass fuel fineness, nozzle position and blending combustion proportion; and according to a numerical simulation result, corresponding process system design optimization and combustion adjustment measure formulation are carried out. According to the method, on the basis of raw material basic physicochemical and combustion characteristic analysis, a coal-biomass-coke oven gas large-difference fuel multi-element mixed combustion model is constructed, and on the basis of numerical simulation calculation, safe and stable mixed combustion of biomass fuel in the positive-pressure direct-fired pulverized coal boiler for large-proportion mixed combustion of surplus coal / coke oven gas of an iron and steel plant is achieved.

The invention discloses a sampling system and method for measuring tar and dust in coking coal gas, the sampling system comprises a sampling assembly, a gas washing assembly, a gas flowmeter and a gas return assembly, the sampling assembly comprises a sampling pipe and a sampler, the sampling pipe is inserted on a coal gas main pipe, the sampling pipe is connected with the sampler, and the sampler is connected with the sampling assembly. The sampler is used for absorbing tar and dust in coal gas, the gas washing assembly is connected with the sampler, an absorption medium is arranged in the gas washing assembly, the gas flow meter is connected with the gas washing assembly, the gas return assembly comprises an anti-explosion pump and a gas return pipe, and the gas flow meter is connected with a main coal gas pipe sequentially through the anti-explosion pump and the gas return pipe. According to the invention, the tail gas after gas taking is discharged into the coal gas main pipe again, so that the pollution to the environment is avoided. And moreover, interference components which influence the gas flowmeter in the coal gas are removed by utilizing an absorption medium in the gas washing assembly, so that the purpose of protecting the flowmeter is achieved, and the service life of the flowmeter is prolonged.

The present invention belongs to the technical field of blast furnace smelting and relates to an iron-making method and system based on coupled blowing of CO2-containing coal gas and biomass. The system of the present invention comprises: a material basic data storage and processing module; a material balance and heat balance measurement and calculation module; a biomass addition amount calculation module; a material basic parameter input module; a metallurgical process parameter input module; a smelting parameter constraint interval input module; and a low-carbon smelting parameter output module. A measurement and calculation method according to the present invention is based on the material balance and heat balance. On the premise that CO2-containing coal gas is blown in a blast furnace, the required blowing amount of the biomass and the corresponding coke ratio and coal ratio are calculated on the basis of the heat difference, and low-carbon smelting in the blast furnace is realized. The system and method can guide the blowing of CO2-containing coal gas in the blast furnace and determine the biomass addition amount; in addition, process parameters satisfying low-carbon smelting in the blast furnace can be obtained at any time according to the types and compositions of a fuel, a furnace burden, the CO2-containing coal gas, and the biomass, and compared with original smelting conditions, the purpose of reducing the fuel ratio can be achieved.

A graded tar recovery system relates to the field of tar recovery. The graded tar recovery system includes a heat exchanger and a tar adsorption and desorption integrated rotary device. The heat exchanger is provided with a baffle and a heat exchange tube. The tar is separated under the indirect cooling of the heat exchanger and the inertial separation of the baffle. The adsorption and desorption integrated rotary device includes four turntables with the same mechanism. Each turntable rotates in an adsorption zone and a desorption zone with different temperatures under the drive of a belt. The adsorbent absorbs the tar to separate the tar from the coal gas. The adsorbent that adsorbs the tar sequentially desorbs and recovers the tar with different boiling points in the desorption zone with different temperatures. The system can realize the classified recovery of tar with different boiling points without generating chemical wastewater, is green and environmentally friendly, and also improves the recovery efficiency.

The invention discloses a heating furnace control method and system based on expert control and a storage medium, and the method comprises the following steps: constructing an expert knowledge employing a generative rule to represent combustion control knowledge, and the rule form is IFlt; a precondition gt; tHNt, THNt, THNt; performing conclusion operation gt; the preconditions comprise a furnace temperature error range, a furnace pressure state, a flue gas temperature and a reversing period parameter, and the conclusion operation comprises gas flow adjustment, air-fuel ratio correction, and setting of a flue valve opening degree or a burner reversing period; dynamic parameter prediction and optimization: calculating a predicted temperature value under the current working condition based on a furnace temperature prediction model; performing multi-target collaborative reasoning: searching a matching rule set in a heuristic manner, and combining a Hash algorithm to quickly position a control conclusion; the optimized air-fuel ratio, reversing period and furnace pressure parameters are issued to a PLC, and an execution mechanism is driven to adjust the frequency of a gas valve, the frequency of an air valve and the frequency of a smoke exhaust fan; and self-learning and knowledge base updating: dynamically correcting the rule weight according to the historical control effect.

The utility model discloses an electric igniter for continuously purifying raw gas of a test furnace, which is characterized in that an electric heating wire is pre-embedded in a silicon-based ceramic heating body of the electric igniter and is formed by hot pressing and sintering, a power supply module provides a working power supply for the electric heating wire, a temperature control chip detects the temperature of the silicon-based ceramic heating body in real time, and the output power of the electric heating wire is controlled through a power regulator. Setting a heating curve in the test furnace according to a production process, communicating the temperature control chip with a PLC (Programmable Logic Controller) of the test furnace, and reading the set heating curve of the test furnace; and controlling the silicon-based ceramic heating body to output different powers through a power regulator according to each stage of the heating curve, so as to ensure that the raw gas generated in each stage is ignited and purified. According to the electric igniter and the control method, the defects of traditional raw gas combustion treatment are overcome, external combustible gas does not need to be introduced, reliable combustion of the raw gas is ensured, the electric igniter can work in a high-temperature and high-corrosion smoke environment for a long time, the service life is prolonged, and the purpose of safely discharging the raw gas is achieved.

The invention relates to the field of clean energy development and utilization, in particular to an underground coal gasification method with high-temperature steam as a gasifying agent and an experimental device. The method comprises the steps of exploration, well building, permeability increasing, gasification, coal gas utilization and waste treatment, the experimental device comprises a steam generator and a gasification furnace, the steam generator injects high-temperature steam into the gasification furnace, the high-temperature steam is used for coal gasification, in the gasification step, the high-temperature steam is injected into a coal seam, and the high-temperature steam is used for coal gasification. The high-temperature steam serving as a gasifying agent is subjected to a series of reactions with the coal, the high-temperature steam is gasified to generate coal gas through chemical reaction with the coal, and the high-temperature steam is also used for heating the coal to pyrolyze the coal to generate coal gas; according to the method, oxygen is not directly injected into the coal seam, the coal seam is not ignited, and combustion of coal is not involved, but high-temperature steam is injected into the coal seam, the underground coal gasification process is completed through the oxidation-reduction reaction and the distillation pyrolysis action of the high-temperature steam and the coal, and the raw gas is generated.

The utility model relates to the technical field of metallurgical energy conservation, in particular to a power generation device for preheating by using submerged arc furnace gas power generation tail gas as a heat source, which comprises a submerged arc furnace, a submerged arc furnace gas recovery processing device, a gas generator set, a denitration and desulfurization device and a preheating device, the submerged arc furnace gas recovery processing device is connected with the submerged arc furnace and the gas generator set and used for purifying gas generated by the submerged arc furnace and then sending the purified gas to the gas generator set for power generation, and the denitration and desulfurization device is connected with a tail gas exhaust port of the gas generator set and used for conducting denitration and desulfurization treatment on tail gas generated after power generation. The denitration and desulfurization device is connected with the preheating device and used for feeding tail gas subjected to denitration and desulfurization into the preheating device to preheat materials, and the preheating device is connected with the submerged arc furnace and used for feeding the preheated materials into the submerged arc furnace for smelting, so that energy waste caused by direct emission of high-temperature tail gas generated after power generation is avoided; and the demand on external energy in the preheating process is also reduced.

The invention relates to an external combustion and external heating type pulverized coal pyrolysis system and a pulverized coal pyrolysis method. The external combustion and external heating type pulverized coal pyrolysis system comprises a coal dry distillation device, a flue gas heat exchange system and a raw gas system, the flue gas heat exchange system comprises an external coal gas combustion furnace, a high-temperature flue gas distribution system and a flue gas mixing temperature control system; the raw coke oven gas system comprises a raw coke oven gas cooling and collecting system and a raw coke oven gas purifying system; the coal dry distillation device adopts a three-section structure comprising a low-temperature pyrolysis drying section, a medium-high-temperature pyrolysis section and an upgraded coal cooling section, waste gas generated by combustion of coal gas in an external coal gas combustion furnace is introduced into the medium-high-temperature pyrolysis section to indirectly transfer heat with slack coal, and cascade pyrolysis of the raw material slack coal is realized; the inlet flue gas temperature of the medium-high temperature pyrolysis section and the low-temperature pyrolysis drying section is controllable, so that the service life of equipment is prolonged, and the product quality is stabilized; according to the invention, slack coal pyrolysis can be stably and continuously realized, the product quality is good, and the investment yield is high.

The invention discloses an automatic combustion control method and system for a slag pulverizer hot blast stove. The method comprises the following steps: acquiring operation parameters of a hot-blast stove and a slag pulverizer; selecting one of a furnace temperature control mode and a flow control mode for execution according to the production stage; the total target gas flow is calculated in the selected mode, wherein the flow control mode is subjected to prospective adjustment according to a linkage rule base of mill operation parameters; the air-fuel ratio is corrected based on double feedback of coal gas components and flue gas residual oxygen; and finally, distributing the target flow to a plurality of burners and executing combustion. Through dual-mode switching and intelligent linkage with the mill, conversion from reaction type control to predictive type control is achieved, thermal lag is effectively overcome, combustion efficiency is ensured through dynamic air-fuel ratio correction, and the energy utilization rate, operation stability and automation level of the system are remarkably improved.

The invention discloses a system and a method for producing sponge iron by coupling a gasification furnace and a gas-based shaft furnace. The system comprises a coal pretreatment device for pretreating received raw material coal; the gasification furnace receives the raw material coal treated by the coal pretreatment device through a conveying device, and synthesis gas is obtained through reaction; the mixer receives furnace top gas generated by the gas-based shaft furnace, mixes the furnace top gas with synthesis gas to obtain mixed gas, and outputs the mixed gas to the dust remover; the high-temperature desulfurization device is used for carrying out desulfurization treatment on the dedusted mixed gas by using a high-temperature desulfurization agent, and the high-temperature decarbonization device is used for carrying out decarbonization treatment on the desulfurized mixed gas and outputting the decarbonized mixed gas to the gas-based shaft furnace; iron ore and / or oxidized pellets are / is arranged in the gas-based shaft furnace, the decarbonized mixed gas is received, and sponge iron is generated through reaction. According to the method, the synthesis gas is cooled by using the furnace top gas, additional cooling equipment is not needed, the cost is reduced, the energy utilization rate is increased, and cleaner and more efficient sponge iron production is realized.

The invention relates to the technical field of coal gas water treatment, and discloses a purification treatment system for coal gas water after coal gasification, which comprises a pretreatment tank, a biochemical treatment tank is arranged on one side of the pretreatment tank, a deep treatment tank is arranged on one side of the biochemical treatment tank, a pipe frame is arranged in the biochemical treatment tank, and the pipe frame is arranged in the deep treatment tank. Membrane filaments are arranged in the pipe frame. In the coal gas water treatment process, when the membrane wires are broken, two-stage plugging of the pipeline can be achieved, so that the coal gas water which is sucked into the membrane wires due to the fact that the membrane wires are broken and not filtered cannot enter the transverse pipe, the coal gas water cannot enter the pipe frame to pollute the pipe frame and the transverse pipe, the plugging effect is good through two-stage plugging of the pipeline, and the sealing effect is good. The anti-pollution effect on the pipe frame and the transverse pipe is improved, it can be guaranteed that no impurity is accumulated at the end of the circular ring before plugging is conducted, and a pipeline can be better plugged in cooperation with a plugging ball without impurity accumulation.

The invention relates to the technical field of metallurgical automation control, and particularly discloses a method for applying a two-stage process control technology to automatic combustion of a lime kiln, an automatic combustion control system of the lime kiln comprises data acquisition and two-stage process control, the data acquisition is realized through Kepware, and first-stage PLC data is acquired and stored in a database table; the set value of the secondary process control calculation is stored in the database table and is issued to the primary PLC through the Kepware; the preheater center temperature presetting module controls the center temperature of a preheater by adjusting the opening degree of a coal gas adjusting valve, and the center temperature of the lime kiln preheater is automatically controlled through fuzzy control, case reasoning, a Bang-Bang controller and rule operation. Automatic combustion of the lime kiln is achieved, the kiln temperature, the kiln pressure and the discharging temperature of the lime kiln are accurately controlled within the set range, reasonable matching of pulverized coal, coal gas and air is achieved through case-based reasoning, energy is saved, consumption is reduced, and labor intensity is relieved.