2111 results about "Coal gas" patented technology

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 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 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 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 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 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 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 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.

The invention discloses a rotary kiln pyrolysis process preheating and replacing method which comprises the following steps: replacing and preheating an upgrading system when a rotary kiln is started, performing low-load operation on the rotary kiln, heating the rotary kiln by a rotary kiln hot blast stove and a flue gas fan, closing a pipeline valve from a dry gas fan to a first dust remover, and performing low-load operation on the rotary kiln; a rotary kiln nitrogen replacement valve is slightly opened, nitrogen enters the rotary kiln through a dry gas guide screw for replacement and heat removal, an oil and gas pipeline is preheated, direct cooling tower spraying cooling water and indirect cooling tower circulating cooling water are put into use, a coal gas fan is started for system circulation, and an electrical tar precipitator outlet is opened to a rotary kiln starting line valve; the invention further discloses a rotary kiln quality improvement system, the rotary kiln pyrolysis process preheating and replacement method is adopted, the start-up time is effectively shortened, the investment and operation cost is saved, and meanwhile a foundation is laid for long-period stable operation of the system.

The invention provides a method for calculating the inner wall temperature based on the condensation heat transfer process of a blast furnace gas pipeline. The method for calculating the temperature of the inner wall based on the condensation heat transfer process of the blast furnace gas pipeline comprises the following steps: S1, calculating the thermal resistance of convective heat transfer between the inner wall of the gas pipeline and blast furnace gas; s2, calculating the thermal resistance of heat conduction between the gas pipe walls; s3, thermal resistance of convective heat transfer from the outside of the gas pipeline to the outer wall of the gas pipeline is calculated; and S4, calculating the corrosion temperature of the inner wall surface of the blast furnace gas pipeline according to the total thermal resistance, the blast furnace gas temperature and the environment temperature. According to the method for calculating the inner wall temperature based on the condensation heat transfer process of the blast furnace gas pipeline, the heat resistance of each part of the blast furnace gas in the heat transfer process is calculated on the basis of the heat convection and heat conduction process, and the scientific and systematic method for calculating the inner wall temperature of the blast furnace gas is established; the corrosion condition of the blast furnace gas pipeline can be conveniently predicted, and the safe operation of the blast furnace gas pipeline can be monitored.

The invention discloses a continuous equipment temperature distribution optimization control method and system, and belongs to the technical field of temperature control, and the method specifically comprises the steps: monitoring equipment production process parameters in real time, and transmitting the parameters to a control center; the control center corrects the parameters by using a compensation algorithm constructed based on an ideal gas state equation, extracts furnace temperature data from the corrected parameters, calculates a control signal according to the deviation between the furnace temperature data and a preset furnace temperature target value by adopting PID (Proportion Integration Differentiation) operation, and adjusts the opening degree of a gas actuator to obtain a corrected gas flow value; calculating required combustion-supporting air flow according to the value and a preset air-fuel ratio, and adjusting a combustion-supporting air actuator to stabilize heat supply in the furnace; when the furnace temperature is stable, an online temperature measurement thermal imager is used for collecting the temperatures of five point positions of the pipe body, the average value is calculated and compared with the temperature required by the process, and then the left and right temperature adjustment areas are adjusted; the method can effectively improve the stability of equipment production and the product quality.

The utility model relates to the technical field of coal gas purification equipment, in particular to an electrical tar precipitator insulating device without introducing nitrogen. Comprising a body, an upper hanging bracket, a hanging rod, an umbrella-shaped cover, a cylinder body, a spraying pipe, a connecting cylinder and an insulating box, the connecting cylinder is fixedly connected to the top of the body, and the bottom extends into the body; the barrel is fixedly connected to the bottom of the connecting barrel; the umbrella-shaped cover is fixedly connected to the bottom of the barrel; the top end of the suspender is fixedly connected into the insulation box, and the bottom end of the suspender extends out of the umbrella-shaped cover; the umbrella-shaped cover and the cylinder body are made of insulating polytetrafluoroethylene, the surfaces of the umbrella-shaped cover and the cylinder body are modified into oleophobic structures or oleophobic coatings, and the umbrella-shaped cover and the cylinder body are used for sealing the lower portion of the insulating device so that coal gas cannot enter the insulating device and are insulated so that the insulating device does not need to be filled with nitrogen. Nitrogen is not introduced into an insulation box, so that energy is saved, gas purity is guaranteed, and stable operation of equipment is guaranteed.

The invention belongs to the technical field of strip mine residual coal resource recovery, and particularly relates to a strip mine end slope residual coal underground gasification re-mining process and system.The strip mine end slope residual coal underground gasification re-mining process comprises the following construction steps that S1, a directional drilling system is constructed at a strip mine end slope coal seam outcrop and comprises a gas injection drilling hole, an exhaust drilling hole and a drainage drilling hole, forming a gasifier type I suitable for a thick coal seam or a gasifier type II suitable for a thin-medium thick coal seam; s2, injecting a gasification agent into the gasification furnace to perform coal bed gasification to generate coal gas and capture CO2 in gasified tail gas; s3, pressurizing and liquefying the captured CO2, injecting the liquefied CO2 into a combustion space area, and performing mineralization and storage in combination with alkaline ash; wherein the gas injection drill hole and the exhaust drill hole are arranged at the bottom or the top of a coal seam according to the thickness difference of the coal seam, and part of accumulated water is reserved in the whole drainage drill hole to prevent gas leakage. Therefore, efficient recovery of residual coal and full-process low-carbon emission are realized through differential gasification furnace structural design, dynamic sealing of the drainage drill hole and collaborative filling technology of the combustion space area.

The utility model relates to the technical field of gas primary coolers, in particular to an anti-blocking gas primary cooler. The device is of a vertical structure, comprises a coal gas washing section, a low-temperature water section, a circulating water section and a coal gas equalizing section which are fixedly connected in sequence from bottom to top, and further comprises an ammonia water tank connected with a coal gas washing section pipeline, the coal gas washing section is provided with an ammonia water spraying pipe, and coal gas is washed by ammonia water; the coal gas washing section is connected with the coal gas equalizing section through a coal gas connecting pipeline, and washed coal gas without impurities enters the coal gas equalizing section through a pipeline; the coal gas is provided with a horizontal main pipe and a plurality of branch pipes symmetrically arranged on the two sides of the main pipe in a segmented mode, and the coal gas evenly enters the primary cooler through the branch pipes. The impurity content in the gas is reduced and the gas primary cooler is prevented from being blocked.

The invention discloses a method for improving coal gas recovery quality through dry dedusting, which comprises the following steps: S1, setting and dynamically adjusting the rotating speed parameter of a fan aiming at each stage of converter smelting, and controlling the fan to operate according to different operation links and blowing time periods in the smelting process and the set rotating speed parameter and time parameter; s2, raw material preparation and parameter regulation and control are carried out, components, temperature and charging quantity parameters of molten iron entering a furnace are set and controlled, and meanwhile the charging quantity and charging mode parameters of waste steel are set and regulated and controlled; s3, according to the silicon element content of the molten iron, correspondingly setting and controlling a furnace mouth micro differential pressure parameter; s4, in the main blowing smelting stage, oxygen supply flow parameters are matched, set and controlled according to the silicon element content of the molten iron; s5, auxiliary control parameter setting and measures are implemented, wherein the auxiliary control parameters comprise a smoke hood operation control parameter, an evaporative cooling system medium adjustment parameter, a gas recovery program optimization parameter and a fan rotating speed control mode configuration parameter; and S6, after smelting is finished, the recovery average value of CO in the coal gas is recorded. According to the method for improving the coal gas recovery quality through dry dedusting, the average CO value of coal gas recovery is larger than or equal to 55%, the heat value is high, the coal gas quality is stably improved during continuous production of a converter, and the cost reduction and efficiency improvement effects are obvious.

The invention discloses a supercritical carbon dioxide energy storage and industrial complementary energy coupling circulation system and a control method, and relates to the technical field of energy storage. The waste heat recovery system performs countercurrent heat exchange with carbon dioxide by using high-temperature flue gas generated by combustion of high / coke / converter gas; and the residual cold recovery system uses condensed water of the power plant for cooling carbon dioxide in each link. The compressed carbon dioxide energy storage system compresses and stores carbon dioxide in a high-pressure storage tank. In the compressed carbon dioxide power generation system, high-pressure carbon dioxide is preheated and heated to drive a high-pressure expansion machine to do work and generate power, the carbon dioxide after doing work is heated to drive a low-pressure expansion machine to do work and generate power, and finally the carbon dioxide is cooled, condensed and liquefied through a cooler and a condenser and then returns to a low-pressure storage tank. According to the system, industrial complementary energy is efficiently utilized, stable energy storage and release are achieved, and the energy utilization efficiency is improved. The problem that defects exist in the aspects of industrial gas efficient utilization and energy storage coupling in the prior art is solved.

The invention belongs to the technical field of industrial combustion safety control, and provides a double-channel industrial furnace gas combustion safety interlocking control system which comprises a gas / air flow ratio dynamic monitoring module, a flue CO concentration online detection module, a double-channel data conflict arbitration processor and a visual human-computer interface. Aiming at the prominent problems of incomplete combustion of coal gas, carbon deposition, detonation risk and the like which are easy to occur under the working condition of accelerated temperature rise, the system integrates visual double-insurance safety control of dynamic calculation of a flow ratio and real-time analysis of tail gas components, and all-directional safety protection in the combustion process is realized through a multi-parameter cooperative monitoring and intelligent interlocking mechanism; the detonation risk is obviously reduced; meanwhile, the air-fuel ratio fluctuation is accurately controlled within the range of + / -5%, and the carbon deposition phenomenon is effectively reduced; and remarkable economic benefits are created while reliable operation of equipment is guaranteed.

The invention discloses a coal-to-methanol conversion treatment system and a coal-to-methanol conversion treatment simulation method. The coal-to-methanol conversion treatment system comprises a gas separator, a conversion furnace, a first water separation device, a stripping tower and a second water separation device. Water gas of a gasification section enters a gas separator, and a gas phase discharged from a gas outlet of the gas separator is divided into a first gas phase and a second gas phase through a flow divider; the inlet of the conversion furnace is connected with the flow divider so that the first gas phase flows into the conversion furnace; the first water separation device is used for performing multi-stage separation on the mixed gas; steam entering the stripping tower from the steam inlet is in contact with condensate entering the stripping tower from the first water separation device; and the second water separation device is connected with the gas outlet of the stripping tower to separate the vent gas and the wastewater. Water gas can be effectively treated, so that the energy consumption of the system is reduced, the water-saving and environment-friendly effects are achieved, and the purposes of improving quality and efficiency can be achieved.

The utility model discloses a double-gas ignition furnace, which belongs to the technical field of ferrous metallurgy and comprises a plurality of ignition nozzles arranged in the ignition furnace, M gas pipelines and M combustion-supporting air pipelines, and the M gas pipelines and the M combustion-supporting air pipelines are arranged above the ignition furnace. The gas inlet of each gas pipeline is also connected with a blast furnace gas pipeline and / or a coke oven gas pipeline for providing fuel; a gas outlet of each gas pipeline is connected with gas inlets of a plurality of ignition nozzles through ignition nozzle pipelines; the air inlet of each ignition nozzle pipeline is further connected with a combustion-supporting air pipeline used for providing combustion-supporting air. An air blower is arranged at an air inlet of the combustion-supporting air pipeline; wherein the blast furnace gas pipeline, the coke oven gas pipeline, the combustion-supporting air pipeline and the ignition nozzle pipeline are respectively provided with a plurality of valves; m is a natural number not less than 3; the ignition furnace effectively solves the technical problem that the ignition furnace in the prior art cannot flexibly use blast furnace gas and / or coke oven gas as fuel.

The invention discloses a high-efficiency coking furnace, and relates to the technical field of coking equipment, the high-efficiency coking furnace comprises a furnace body assembly, the furnace body assembly comprises a lower furnace body and an upper furnace body, the outer wall of the lower furnace body and the outer wall of the upper furnace body are sleeved with a heat insulation shell, the bottom of the heat insulation shell is fixedly connected with a supporting base, and a rotating assembly is installed at the center of the top surface of the supporting base; a heat energy recovery assembly is installed on the top face of the upper furnace body, the heat energy recovery assembly is connected with a purification assembly, and two temperature sensing assemblies are installed in the heat energy recovery assembly. The heat exchange structure can fully utilize heat energy of high-temperature flue gas in the carbonization chamber to preheat low-temperature clean coal gas and cold air, a gas heat absorption path is prolonged through a labyrinth structure, the temperature of gas entering the gas mixing ring is greatly increased, and the mixed combustion heat value of the clean coal gas and hot air after heat exchange is remarkably higher than that of normal-temperature mixed gas; therefore, combustion efficiency is improved, fuel consumption is reduced, and sufficient and stable heat sources in the coking process are ensured.

The invention provides a supergravity dust removal device integrating rotary atomization and filling. The supergravity dust removal device comprises a shell, a first motor, a demisting module, a filling layer, a liquid distributor and a second motor, the shell is provided with a gas outlet, a liquid inlet, a gas inlet and a liquid outlet, and the gas inlet is used for introducing coal gas; the filler layer is arranged in the shell, is connected with the output end of the second motor and is used for improving the gas-liquid mixing effect and the dust trapping efficiency in a rotating state; the liquid distributor is communicated with the liquid inlet, a plurality of atomizing nozzles are arranged on the liquid distributor, and liquid is atomized and then sprayed to the filler layer; the demisting module is arranged above the liquid distributor, the demisting module and the liquid distributor are jointly connected with an output shaft of the first motor, and the demisting module and the liquid distributor are used for separating liquid drops and particles in the gas in a rotating state. According to the dust removal device, inertial sedimentation of coarse particles and supergravity separation of fine particles can be integrated, and graded dust removal and liquid removal are achieved.

The utility model relates to a raw gas source upgrading system for an internal heating type vertical furnace. The raw gas source upgrading system comprises a dry distillation furnace, a carbon dioxide removal device and a pure oxygen preparation device, the device further comprises a first multi-stage mixer, a second multi-stage mixer, a gas sampling analysis tube and a gas component detector. Pure oxygen is adopted as a combustion improver, so that the content of nitrogen in the raw gas is greatly reduced, and the application scene of coal gasification production and deep processing of the internal heating type vertical furnace is expanded; the components of combustion-supporting gas, combustible gas and inert gas in mixed gas in a lattice wall of the dry distillation furnace are controlled by adopting double-circulation control of carbon dioxide and recirculated gas, the combustion intensity and the uniformity degree are strictly controlled under the condition that dry distillation heat supply is met, and scabbing and burning loss of a dry distillation furnace body are avoided.

The invention relates to the technical field of carbon neutralization, and discloses a critical electricity price calculation method based on green electricity energizing tempering coupling methanol preparation, and the method comprises the steps: building an ironmaking byproduct gas database and defining green hydrogen preparation parameters based on different ironmaking processes, and building a gas purification cost model based on the ironmaking byproduct gas database and the green hydrogen preparation parameters; constructing a ton methanol complete cost model of a tempering coupling methanol preparation path X; a reference process HCTM is selected, C (X) is made to be equal to C (HCTM), and an analytic expression of the critical electricity price is solved; the actual electricity price is compared with the critical electricity price, if the actual electricity price is compared with the critical electricity price, it is judged that the path X has economic advantages relative to the HCTM under the current year T and the carbon tax condition, and if not, it is judged that the path X does not have economic advantages relative to the HCTM. The investment risk of a green methanol project can be remarkably reduced.

The invention discloses an active treatment method for multi-source residual coal gas of a waste mine, which comprises the following steps: firstly, hydraulic fracturing pressure relief permeability improvement and overlying strata separation layer grouting reinforcement are cooperated, the hydraulic fracturing pressure relief permeability improvement establishes a netted fracture network in a coal body to realize permeability improvement, and the overlying strata separation layer grouting reinforcement compacts goaf gangue through grouting and reinforces an overlying strata to form a continuous bearing consolidation body; and therefore, a pressure relief and permeability increasing-strengthening and reinforcing integrated structure is formed, a stable structure and a penetrating seepage network are provided for subsequent displacement and gas extraction, and the subsequent gas extraction efficiency is guaranteed. Then low-temperature liquid CO2 is injected into the coal seam through the injection well, gas displacement and desorption are conducted on gas adsorbed in the coal seam under the action of phase change and competitive adsorption, expansion and development are conducted on fractures to enable permeability to be secondarily enhanced, and meanwhile part of CO2 obtained after displacement is retained and sealed in a coal body and a goaf; on the premise that the gas extraction concentration and efficiency are effectively improved, CO2 can be stored, and the dual effects of resource utilization and carbon storage are achieved.

The invention discloses a mixed integer linear programming-based iron and steel industry power grid interactive full-process scheduling method. The method comprises the specific steps of S1, constructing a dynamic balance equation and an energy storage equipment dynamic management model; s2, establishing a multi-energy coupling collaborative optimization model; s3, setting a target function, an energy storage equipment constraint condition and a key equipment power constraint condition; s4, embedding a demand response load adjustment model; and S5, based on the model embedded in the step S4, solving by using a mixed integer linear programming algorithm to obtain an optimal scheduling scheme. According to the iron and steel industry power grid interactive full-process scheduling method based on mixed integer linear programming, by constructing an iron making-steel making-rolling full-process energy flow dynamic coupling model, secondary energy balance of coal gas, steam and the like and power grid demand response instructions are integrated, and collaborative optimization of energy and production between processes is achieved.

The invention belongs to the technical field of coal gas waste heat recovery, and provides a coal gas waste heat recovery system and method, and the method comprises the steps: building a recovery operation database based on the recovery operation data of the coal gas waste heat recovery system during each coal gas waste heat recovery operation in a plurality of historical cycles, respectively extracting the recovery resistance and the waste heat recovery amount in a plurality of historical periods to obtain a correlation diagnosis value, if the correlation degree is close, performing stability analysis on the change trend of the recovery resistance in the plurality of historical periods, evaluating whether the change trend of the recovery resistance is stable or not, and if the change trend of the recovery resistance is stable, determining the waste heat recovery amount according to the correlation degree between the recovery resistance and the waste heat recovery amount. According to the method, the correlation change curve is obtained, whether the fitted correlation fitting line is matched with the correlation change curve or not is analyzed, if yes, the correlation fitting equation corresponding to the correlation fitting line serves as the waste heat recovery prediction model, the prediction precision of the constructed waste heat recovery prediction model is improved, and the problem that it is difficult to determine the recovery resistance adjustment value according to the target waste heat recovery amount is solved.

The utility model relates to the technical field of coke oven heating, in particular to a coke oven gas heating combustion chamber temperature control device, which is characterized in that a gas header pipe adjusting unit is arranged at the front end of a single-hole combustion chamber adjusting unit and is connected with a coke oven gas main pipe, and each single-hole combustion chamber adjusting unit is connected with the coke oven gas main pipe; the output end of each single-hole combustion chamber adjusting unit is connected with the corresponding combustion chamber. And the gas main pipe adjusting unit comprises an adjusting valve C, a flow meter and a pressure transmitter, and the adjusting valve C, the flow meter and the pressure transmitter are sequentially arranged on the coke oven gas main pipe. The utility model has the advantages that: the regulating valve and the bypass regulating valve can completely replace the function of a pore plate box, so that the risk that a worker works in a dangerous area such as a gas basement is reduced; the loop A of the first adjusting branch pipe and the loop B of the second adjusting branch pipe are standby for each other, when one loop breaks down, the loop can be switched to the standby loop at any time, and the flow stability of heating gas is improved.