2684 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 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 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 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 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 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.

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.

The invention belongs to but not limited to the technical field of underground coal gasification, and discloses an underground coal gasification method and gas injection equipment. Constructing a directional drill hole and a gasification channel penetrating through the underground coal seam; a gas injection pipe with a plasma torch is put into the gasification channel, a gasification agent is injected, and in-situ gasification of the underground coal seam is implemented; and the generated gas is conveyed to the ground for collection through the drill hole. According to the underground coal gasification method and the gas injection equipment provided by the invention, the gasification agent is activated by the plurality of plasma torches arranged in the directional channel at the tail end of the gas injection pipe and then is directionally jetted to the coal seam, so that the gasification agent is in contact with the coal seam in a short time and is gasified, the directional conveying of the plasma gasification agent is realized, and the effective utilization rate of the plasma gasification agent is improved; meanwhile, a combustion space area of the coal seam after gasification can be expanded in a fan shape in the longitudinal direction with the gasification agent outlets of the plasma torches as the center, the expansion equivalent radius of the combustion space area is relatively large, and a large amount of coal can be gasified through one gasification channel.

The present invention relates to an ironmaking method and system coupling CO2-containing gas with biomass injection, belonging to the technical field of blast furnace smelting. The system of the present invention includes a material basic data storage and processing module; a material balance and heat balance calculation module; a biomass addition amount calculation module; a material basic parameter input module; a metallurgical process parameter input module; a smelting parameter constraint range input module; and a low-carbon smelting parameter output module. The calculation method disclosed by the present invention is based on the material balance and heat balance. On the premise of injecting CO2-containing gas into the blast furnace, the injection amount of the required biomass, as well as the corresponding coke ratio and coal ratio, are obtained through heat difference calculation, realizing low-carbon smelting of the blast furnace. The system and method can guide the injection of CO2-containing gas into the blast furnace and determine the biomass addition amount; the process parameters for meeting the low-carbon smelting of the blast furnace can be obtained at any time according to the types and components of fuels, burden materials, CO2-containing gas, and biomass, and compared with the original smelting conditions, the purpose of reducing the fuel ratio can be achieved.

The utility model discloses a phenol water recovery system of a two-section type gas producer. The phenol water recovery system comprises a gas producer, a phenol water superheater, a phenol water boiler and a gas cooler. According to the phenol water recovery system of the gas producer at the two ends, the phenol water in the gas can be recovered, the sensible heat of the gas at the lower section is used for heating the phenol water to form phenol water vapor, the phenol water vapor and a gasifying agent are heated together, and the phenol water vapor is introduced into the gas producer through the first gasifying agent inlet and the second gasifying agent inlet; the superheat degree of water vapor in the gasifying agent is high, so that phenol is prevented from being brought into ash slag through condensation of the water vapor, the ash slag is prevented from being changed into hazardous waste, the problem of wastewater treatment is thoroughly solved, sensible heat of lower-section coal gas is fully utilized, energy waste is avoided, and the heat efficiency is improved.

The invention belongs to the technical field of metallurgy, and relates to a carbon reduction method for a direct reduction device, which comprises the following steps: step 1, feeding a carbon-containing raw material and an oxidant into a conversion unit for oxidation reaction to obtain crude synthesis gas; 2, feeding the crude synthesis gas into a direct reduction unit for ironmaking, and respectively feeding furnace top gas discharged by the direct reduction unit into a conversion unit and a tail gas discharge unit after dust removal by a dust removal unit; 3, a part of the furnace top gas and a carbon-containing raw material are subjected to a reforming reaction in a conversion unit to obtain synthesis gas, and the synthesis gas is fed into a direct reduction unit for ironmaking; and the other part of furnace top gas is discharged after being treated by the tail gas discharge unit. According to the method, a carbon dioxide closed-loop conversion system is constructed, efficient carbon reduction is achieved through a coupling mechanism of non-catalytic partial oxidation and autothermal reforming, and compared with a traditional hydrogen-based shaft furnace ironmaking method, the carbon reduction method has the advantage that the carbon dioxide emission is reduced by at least 25%.

The invention discloses a medium-temperature preheating smelting reduction ironmaking system, which comprises a smelting reduction furnace, a smelting reduction furnace, a preheating furnace and a preheating furnace, the waste heat recovery part is connected to the coal gas outlet so as to change the high-temperature coal gas into medium-temperature coal gas; the heat exchange device is connected to the waste heat recovery part and the carrier gas source, and the heat exchange device is used for carrying out heat exchange on the normal-temperature injection carrier gas and the medium-temperature coal gas conveyed by the waste heat recovery part so as to obtain medium-temperature injection carrier gas; the hot ore supply part is connected to the heat exchange device and the smelting reduction furnace, and the hot ore supply part is used for providing preheated hot iron ore powder and conveying the hot iron ore powder to the smelting reduction furnace through medium-temperature injection carrier gas; and the pulverized coal supply part is connected to the heat exchange device and the smelting reduction furnace and conveys pulverized coal to the smelting reduction furnace through medium-temperature injection carrier gas. Hot iron ore powder and pulverized coal are conveyed through medium-temperature injection carrier gas, heat preservation is conducted on the hot iron ore powder and the pulverized coal, heat loss is reduced, reduction reaction is facilitated, the coal ratio is reduced, the ironmaking yield is increased, and energy conservation and environment protection are achieved.

The invention relates to the technical field of steel sintering processes, in particular to a biomass gasification coupling system for a steel sintering process, which comprises a biomass gasification system, a circular cooler waste heat utilization system and a waste heat power generation system, the biomass gasification system comprises a biomass drying system, a raw material conveying belt system, a biomass gasification furnace, a biomass gas heat insulation combustion chamber, a sintered coke powder preparation system and a biomass gas purification system, and the biomass drying system is used for drying biomass raw materials; and the dried biomass raw materials are conveyed to the biomass gasification furnace through the raw material conveying belt system. According to the coupling system for biomass gasification for the steel sintering process and the control method, biomass serves as zero-carbon energy, and biomass charcoal obtained after biomass gasification can replace part of solid fuel to achieve the carbon reduction effect. Meanwhile, the biomass gasified gas can replace a part of coal gas, and the carbon reduction effect can also be achieved.

The invention relates to the technical field of gas blow-off valves, and particularly discloses a blast furnace top gas blow-off valve sealing device, the side face of a valve body is fixedly connected with a transmission part, the output end of the transmission part is fixedly connected with a valve cover, and the bottom of an inner cavity of the valve body is fixedly connected with a net plate; the top of the moving part is fixedly connected with a contact part, the top of the contact part is rotatably connected with a cleaning part, the moving part comprises a fixed shaft, the bottom of the fixed shaft is fixedly connected with the top of a net plate, and the fixed shaft is slidably connected with a moving frame. According to the blast furnace top gas blow-off valve sealing device, the moving part is arranged, the moving frame drives the scraping plate to slide in the mode of being tightly attached to the inner wall of the valve body in the moving process, smoke dust attached to the wall face is continuously scraped off, it is avoided that a large amount of smoke dust is left in the valve body when gas is discharged, and the risk that equipment is abraded and blocked due to dust accumulation is reduced; and the service life of the valve body is prolonged.

The invention provides an ultra-clean converter one-time dry dust removal method which comprises the following steps: S1, constructing an ultra-clean converter one-time dry dust removal system which comprises a high-effect heat exchanger, a banana bend separator, a rotational flow heat recovery device, a water-cooling chain conveyor, an electrostatic dust collector, a high-temperature-resistant explosion-proof ultra-clean dust collector, a cooling replacement fan, a coal gas axial flow fan and a coal gas washing dehydrator; s2, purification; S3, recovery: passing the qualified coal gas through a recovery cup valve and then conveying the qualified coal gas to a coal gas cabinet; and S4, unqualified coal gas passes through a diffusion cup valve and then is sent to a diffusion chimney for ignition and diffusion. A converter gas waste heat recovery process is adopted, and meanwhile, an ultra-clean dust remover process is adopted, so that the concentration of an outlet of a dust remover can be stably maintained below 5mg / Nm < 3 >.

The invention relates to the technical field of comprehensive utilization of coal gasification ash, and discloses a coal gasification ash solid waste quality-divided gradient comprehensive utilization method which comprises the following steps: dividing ash into coarse slag and fine slag; performing physical separation on the fine slag to obtain a fine slag filter cake with the carbon content of 5-70%, first low-carbon ash slag with the carbon content of less than or equal to 5% and carbon-rich ash slag with the carbon content of more than or equal to 70%; forming the fine slag filter cake into second low-carbon ash slag by utilizing a fine slag decarburization technology; adding a binder into the carbon-rich ash residue, and gasifying for utilization to obtain third low-carbon ash residue and coal gas; preparing polyaluminum chloride and the like from the high-aluminum ash with Al2O3 greater than or equal to 20% in the low-carbon ash; preparing a water glass agent from the high-silicon ash slag with SiO2 greater than or equal to 40%; preparing a coal-based solid waste cementing material or a coal-based solid waste filling material from the low-silicon aluminum ash residue containing less than 40% of SiO2 and less than 20% of Al2O3 and coal gangue or fly ash; the ash utilization method is simple, the comprehensive utilization rate is high, the coal gasification ash can be treated on a large scale, the ecological environment is protected, and the value of the coal gasification ash can be fully utilized.

The utility model relates to the technical field of coke oven heating, in particular to a mixed gas heating single-hole combustion chamber temperature adjusting system which comprises adjusting units, one end of each adjusting unit is connected with a mixed heating gas main pipe, and the other end of each adjusting unit is connected with a corresponding waste gas shutter. And the mixed coal gas sequentially passes through the mixed heating coal gas main pipe, the corresponding adjusting unit, the corresponding waste gas opening and closing device and the corresponding heat storage chamber to enter the corresponding combustion chamber. The utility model has the advantages that: the original gas heating pipeline is improved, and the regulating valve is connected with the gas heating pipeline in parallel on the basis of not changing equipment (the equipment comprises the regulating cock, the pore plate box and the exchange cock) on the gas heating pipeline, so that the independence of manual regulation is ensured, and the gas heating pipeline is convenient to use. The furnace temperature adjusting effect of each combustion chamber during mixed gas heating is improved; and various pore plates with different diameters are arranged in the pore plate box, so that the requirement of manual adjustment can be met.