691results about "Gas emission reduction" patented technology

The invention discloses a DCS (Distributed Control System)-based ignition and temperature rise mode of a copper anode slime roasting rotary kiln, which specifically comprises the following steps of: setting initial control conditions, drawing a temperature rise curve according to a target temperature, a temperature rise period and a temperature rise gradient, and then starting ignition preparation. Before natural gas is introduced into the combustion chamber for combustion, rotary kiln operation and combustion-supporting air purging are carried out, after purging is carried out for a period of time, combustion-supporting air and natural gas are introduced for ignition at the same time, and meanwhile the ignition condition is judged through a monitor. And if ignition fails, under the condition of no abnormity, purging can be repeated, and natural gas is introduced for re-ignition. According to the method, the natural gas flow and the combustion-supporting air volume are automatically controlled by the DCS according to the drawn temperature rise curve. The system has the beneficial effects that multiple ignition conditions can be controlled at the same time, remote automatic ignition is achieved, the ignition condition is fed back in time, the natural gas flow is flexibly controlled, the combustion temperature is controlled, the ignition effect of the rotary kiln is guaranteed, and meanwhile production operation safety of the rotary kiln is guaranteed.

To reduce carbon dioxide by treating the carbon dioxide in an arc furnace itself, and to provide a carbon dioxide treatment method using a carbon dioxide treatment technique in the arc furnace itself.SOLUTION: An arc furnace for melting metal is used, carbon dioxide-containing gas is introduced into the arc furnace, and the carbon dioxide-containing gas is brought into contact with an arc in the arc furnace to decompose carbon dioxide into oxygen and carbon monoxide. Carbon monoxide and oxygen after decomposition are recovered and reused by a recovery system, and undecomposed carbon dioxide is also recovered by the recovery system and introduced into the arc furnace again to be treated.SELECTED DRAWING: Figure 1

The invention provides a biomass gasification coupling iron ore powder reduction device and method with CO2 circulation, and relates to the technical field of direct reduction of iron from biomass gasification products. The biomass gasification coupling iron ore powder reduction device with CO2 circulation comprises a biomass gasification reaction device and a circulating fluidized bed reduction reaction device. The method comprises a method of a biomass gasification reaction device and a method of a circulating fluidized bed reduction reaction device. Through structural arrangement and application of the biomass gasification reaction device and the circulating fluidized bed reduction reaction device, CO2 gas circulation, zero carbon emission and high-purity iron raw material efficient utilization preparation can be achieved; the preparation method is simple and easy to operate, green and environment-friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

The present disclosure provides a system and a method for steel synthesis using green hydrogen by coupling renewable energy and Carnot batteries with Solid-Oxide Electrolyser Cells (SOEC) and carbon capture. The system provides an end-to-end, geography-agnostic solution for steel synthesis with green hydrogen with round-the-clock renewable energy using Carnot battery that provides both heat and power to run an SOEC at a high efficiency. The hydrogen from the SOEC may be used for direct reduction of iron followed by steel synthesis in an Electric Arc Furnace. The heat from the SOEC is also used for capturing CO2 from the exhaust gases (or air in the DAC configuration). The captured CO2 may be used for electrofuels synthesis along with green hydrogen or electrochemically reduced to carbon. The process heat from DRI and EAF is recycled back to the Carnot batteries.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The utility model relates to the technical field of industrial heating furnaces, in particular to a natural gas continuous type annular forging heating furnace which comprises a furnace body and a rotary furnace bottom located in the furnace body, the interior of the furnace body is divided into a preheating area, a heating area and a heat preservation area, and the rotary furnace bottom is driven by a speed reducer to rotate in the circumferential direction. A smoke outlet and a plurality of combustors are arranged in the furnace body, the combustors are arranged at the tops of the heating area and the heat preservation area in the furnace body, the smoke outlet is formed in the top of the preheating area in the furnace body, and the smoke outlet is externally connected with a negative pressure fan; a plurality of supporting pipes are evenly distributed and fixed to the outer wall of the furnace body in the circumferential direction, a circle of heat preservation skin is fixed to an outer ring formed by the multiple supporting pipes, and the space between the heat preservation skin and the outer wall of the furnace body is filled with heat preservation cotton. The heating furnace can effectively improve the energy utilization efficiency, reduce the energy cost consumption, ensure the stable forging temperature in the furnace, and can form an automatic production line with the previous and later procedures to improve the machining efficiency.

The invention discloses a layered, zoned and differentiated CO2 injection system and method for a blast furnace, and belongs to the technical field of ferrous metallurgy low carbon. The system comprises a CO2 supply and distribution system, a tuyere area injection module, a furnace body middle-lower part injection module and a furnace body upper part injection module. And according to the temperature gradient and atmosphere layering characteristics in the blast furnace, a differential CO2 distribution proportion and a collaborative thermal compensation strategy are adopted. An oxygen-CH4 synergistic injection device is arranged in a tuyere area, and rapid conversion of CO2 is promoted by using a high-temperature strong reducing atmosphere; a biomass charcoal synergistic injection device and an angle-adjustable nozzle are arranged at the middle lower part of the furnace body, so that efficient gasification reaction is realized; and low-concentration CO2 mixed injection is adopted at the upper part of the furnace body, so that indirect reduction reaction is promoted. According to the invention, the CO2 conversion rate is 65-80%, the coke ratio is reduced by 15-25%, the consumption of CO2 per ton of iron is 260-90Nm < 3 >, the carbon emission is obviously reduced, and the ironmaking efficiency is improved.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The present invention relates to reduction of a metal oxide material (5) and to a metal material production configuration (1) adapted for reduction of a metal oxide material (5) holding thermal energy into a reduced metal material (16).The metal oxide material (5) is charged into an upper interior portion (UP) of a reduction facility (7). A hydrogen containing reducing agent (6) is introduced into the reduction facility (7) and is adapted to react with the metal oxide material (5) holding thermal energy for reducing the metal oxide material (5) by utilizing the thermal energy of the metal oxide material (5) to heat or further heat the introduced hydrogen containing reducing agent (6).The reduction facility (7) of the metal material production configuration (1) is configured for providing a heat treatment process of the reduced metal material (16).A control circuitry (50) is configured to adjust the temperature of the hydrogen containing reducing agent (6) and control the temperature of the introduced hydrogen containing reducing agent (6) for reaching at least one desired passivation parameter value (DPPV) of the reduced metal material (16).

The equipment comprises a heating furnace, an opening is formed in one side of the heating furnace, a die forging furnace is arranged in front of the opening at intervals, transmission chains extending to the two sides of the die forging furnace are arranged on the two sides of the opening of the heating furnace, and pipe body deformation restraining pipes are arranged on the portions, located above the two transmission chains, of the two sides of the die forging furnace correspondingly. The two pipe body deformation restraining pipes are coaxially arranged, the ends, away from the die forging furnace, of the two pipe body deformation restraining pipes are connected with a stopping base and a power base respectively, and one side of the stopping base is coaxially connected with an easily-drilled metal rod stretching into an inner hole of a drill pipe body in the die forging furnace through a connecting rod. Compared with an existing drill rod with an anti-abrasion sleeve additionally arranged in the middle of a pipe body, the drill rod is safer and more reliable in use, and the service life of the pipe body of the drill rod is prolonged; meanwhile, compared with a drill rod with a thickened middle formed by turning a thick-wall round pipe, a large number of steel material resources can be saved, the production cost is reduced, and the production efficiency is improved.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

An ironmaking method comprising the production of hot metal (2) and of a blast furnace top gas (10), the method comprising the steps of capturing at least a part of the top gas (10), separating CO2 from the captured top gas (10) so as to produce a CO2-rich stream (12) and a CO2-lean stream (11), mixing the CO2-rich stream (12) with a H2 makeup stream (30) and subjecting the obtained CO2 / H2 gas mixture to a reverse water gas shift reaction in a reactor (3) to produce a reducing stream (13) comprising CO and H2, separating H2 from the reducing stream to produce a CO- rich stream (14) and an H2-rich stream (15), mixing the H2-rich stream (15) with the CO2-rich stream (12) or with the CO2 / H2 gas mixture in the reactor (3) and subjecting the obtained gas mixture to the reverse water gas shift reaction and feeding at least a portion of the CO-rich stream 14 (13) to at least one chemical or biochemical plant (4) to produce one or more chemical products (16).

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The invention discloses a CO2-mediated indirect hydrogen metallurgy blast furnace smelting process, and belongs to the technical field of low-carbon metallurgy and hydrogen metallurgy. According to the process, on the premise that the main body structure of a blast furnace is not changed, CO2 in furnace top gas is captured and mixed with external H2, a reverse water-gas shift reaction is carried out in a high-temperature and high-pressure environment outside the furnace, and high-temperature CO reducing gas is generated; and then directly injecting the high-temperature reducing gas into a soft melting zone area of a blast furnace body by utilizing a special device. According to the method, a central coke adding and distributing mode and a quick response coal injection strategy are matched, and part of pulverized coal and coke can be effectively replaced; by constructing a heat transfer mechanism of heat absorption conversion outside the furnace and heat release reduction inside the furnace, the heat absorption reaction is transferred to the outside of the furnace to be completed, meanwhile, high-temperature gas injected into the furnace body is used for directly supplementing heat in the furnace and strengthening indirect reduction reaction, and cyclic utilization of CO2 is achieved.

A zero-carbon flash reduction ironmaking device comprises a reaction tower, the reaction tower is arranged upside down, a flash reduction area, an iron powder waste heat boiler and a green oxygen preheater are sequentially arranged in an inner cavity of the tower from top to bottom, oxyhydrogen powder entering the tower is subjected to oxyhydrogen combustion, mineral powder green hydrogen absorbs heat and is heated to the high temperature, and all hydrogen reduction reaction is completed before the mineral powder flows out of the flash reduction area. Iron powder is cooled through an iron powder waste heat boiler and a green oxygen preheater, hydrogen steam is cooled through a hydrogen steam waste heat boiler and a mineral powder preheater, and hydrogen water is separated through a cyclone dehydrator and a drying filter. The iron ore concentrate powder with the particle size smaller than 200 meshes falls into a powder bin, the reduction temperature ranges from 1100 DEG C to 1200 DEG C, the time for the ore powder to flow through a flash reduction area ranges from 2 s to 3 s, and the temperature for the ore powder to leave an iron powder waste heat boiler and the temperature for hydrogen steam to leave a hydrogen steam waste heat boiler range from 125 DEG C to 175 DEG C. The invention can be used for flash smelting of iron ore concentrate powder. The invention has the advantages of high waste heat recovery rate, long service life of the furnace lining, low energy consumption and zero carbon emission, and can avoid using the key management object coke ironmaking blast furnace device of the national two-high project.

The utility model discloses a refractory material production performance testing device which comprises a box body, a box door hinged to the front side of the box body through a hinge, supporting frames fixedly connected to the front side and the rear side of the bottom of the box body, an exhaust pipe arranged on the right side of the box body, a fan fixedly connected to the left side of the box body, and a detection mechanism arranged in the box body. And a fixing mechanism is arranged in the box body. According to the utility model, the detection mechanism and the fixing mechanism are used, so that the cylindrical refractory material can be subjected to extrusion and high-temperature testing, and the problem that when the refractory material is tested, various different testing devices, such as a high-temperature testing device, a pressure-resistant testing device and the like, need to be used for comprehensively evaluating the performance of the refractory material is solved; therefore, the refractory material testing cost is increased, the refractory material testing time is prolonged, the refractory material testing efficiency is reduced, and the device has the advantage of being convenient to detect.

The invention discloses an efficient natural gas smelting furnace matched pipe joint device with a self-sealing function, and relates to the technical field of natural gas pipe joints. An efficient natural gas smelter matched pipe joint device with a self-sealing function comprises an L-shaped main pipe, a buffer sealing pipe fixedly installed in the main pipe, and a self-sealing pipe, the two ends of the main pipe are connected with a fuel gas pipeline and a smelter pipeline through two sets of connecting flanges respectively, and the buffer sealing pipe is fixedly installed in the main pipe. Pressure fluctuation is formed through the gradual change hole structure, the buffering sealing pipe is expanded through the high-pressure section, the pressing force between the buffering sealing pipe and the inner wall of the main pipe is enhanced, the self-sealing effect is improved while the self-sealing device adapts to the pressure fluctuation or vibration working condition, and the leakage risk is reduced; local resistance is further reduced through the arc-shaped expansion holes, the conveying efficiency is improved, the piston mechanism is driven through natural gas pressure changes, impurities are alternately collected and discharged through valve element switching, and external energy is not needed.

The present invention concerns a process and a configuration for producing steel, whereby iron ore oxide material (5) is reduced with a reducing agent (H) in a direct reduction facility (7). The reducing agent (H) is produced by electrolysis of water by means of an electrolysis unit (17).The electric energy necessary for the electrolysis comprises re-generative energy, which is derived from hydropower and / or wind power and / or photovoltaic or other re-generative energy forms (2). The intermediate product (RM) is produced independently of the current demand, if sufficient reducing agent is available.An iron ore oxide material (5) holding thermal energy is charged into the direct reduction facility (7). The thermal energy originates from an iron ore oxide material provider device, such as an iron ore oxide material production unit (3) or a pre-heating apparatus (4).The reducing agent (H) reacts with the iron ore oxide material (5) for reducing the iron ore oxide material (5) into the intermediate product (RM) by utilizing the thermal energy of the iron ore oxide material (5).

The utility model relates to the technical field of rotary kilns, in particular to a natural gas combustion device for rotary kiln calcination, which comprises a base, a rotary kiln barrel, a combustion tube and a mixing component, the rotary kiln barrel is mounted on the base, and the combustion tube extends into the rotary kiln barrel and is rotatably connected with the rotary kiln barrel. The mixing assembly comprises a mixing chamber, a stirring shaft, stirring blades, a motor, an air channel, a natural gas channel, a first monitoring component and a second monitoring component, the mixing chamber is arranged, so that air and natural gas can be fully mixed, and the problem that the natural gas can be fully combusted only when the natural gas and the air are fully mixed is solved; however, the problems that natural gas and air cannot be fully mixed by an existing combustion device of the rotary kiln, incomplete combustion is easily caused, and energy is wasted are solved.

The application discloses a low-temperature firing method of mixed porcelain blanks, which comprises three stages. By controlling the kiln pressure, combustion-supporting wind, temperature-adjusting wind, natural gas flow and opening degree of each zone in each stage, the heating speed of each stage is controlled, the porcelain blanks prepared by dry and wet methods are fired together, the problem that the two kinds of porcelain blanks need to be fired respectively in the prior art is solved, the problem of main body cracking and burst of the porcelain blanks due to different water contents of the two kinds of porcelain blanks in the firing process is solved, and the firing efficiency is greatly improved under the premise of ensuring the quality of the porcelain blanks.

Apparatus for the production of molten iron including a metallurgical vessel, having a surrounding wall, a cyclone part provided on top of a smelt reduction part, the cyclone part being in open connection with the smelt reduction part and having at least one supply apparatus around the circumference of the surrounding wall adjusted to introduce oxygen gas into the cyclone part, wherein the at least one supply apparatus is further adjusted to introduce a mixture of oxygen gas and a combustible gas.

Disclosed herein are methods and systems for valuing carbon monoxide emissions from a metallurgical furnace to high-value low-carbon footprint chemicals using carbon monoxide electrolysis. The disclosed method comprises: operating a metallurgical furnace; obtaining a volume of carbon monoxide in relation to the operation of the metallurgical furnace; supplying the volume of carbon monoxide to a cathode region of a carbon monoxide electrolyser for use as a reduction substrate; and using the carbon monoxide electrolyser, the reducing substrate, and the oxidizing substrate to generate a volume of the generated chemical. The volume of the generated chemical is at least one of a volume of a hydrocarbon, a volume of an organic acid, a volume of an alcohol, a volume of an olefin, and a volume of an N-rich organic compound.

A blast furnace operation method according to the present invention is a blast furnace operation method of blowing oxygen gas and a reducing agent containing methane gas into a blast furnace from a tuyere of the blast furnace includes blowing preheating gas having an amount of carried heat greater than or equal to a predetermined amount of heat set in accordance with a blowing amount of the methane gas into the blast furnace from a gas blowing portion provided above the tuyere of the blast furnace in a case where an oxygen concentration in the oxygen gas is 80 vol% or more.

A microwave process and apparatus for processing ore, including a supply of reaction gases from Unipolar electrolysis, which provides an efficient and economical source of reaction gases The process and apparatus includes a reaction gas microwave pre-heat zone to pre-heat the reaction gases to a first temperature prior to input into a main reactor body where the temperature is raised to a higher second temperature to melt the ore and process it into desirable products, such as green steel in an energy efficient manner with reduced emissions.

The invention belongs to the technical field of blast furnace gas treatment, and relates to a method for controlling zero emission of gas in a single blast furnace, which comprises the following steps: step 1, carrying out comprehensive adjustment according to original gas balance, and maintaining gas supply and demand balance; 2, by means of interval regulation and control of the gas holder, dynamic storage of the gas holder and pressure stabilization of a pipe network are achieved; step 3, effectively controlling a switch valve group of tail end diffusion to ensure that the tail end diffusion is safe and controllable; and 4, emergency treatment is conducted in the abnormal production state, special measures are made for blast furnace air reduction, gas flow abnormity and gas temperature abnormity, system safety is guaranteed preferentially, and the zero-emission target is dynamically maintained. According to the method, efficient utilization and zero emission of the blast furnace gas are achieved through multi-link cooperative regulation and control, environmental pollution is reduced, and production economy is improved.

The invention relates to a combined system for producing steel, comprising a blast furnace (1) for producing pig iron, a converter (2) for producing crude steel and a gas line system for gases, said system operating when pig iron and / or crude steel is being produced. According to the invention, said combined system also comprises a chemical or a biotechnology system (11) which is connected to the gas line system, in addition to a system (21) for generating hydrogen. Said system (21) for generating hydrogen is connected to the gas line system by means of a hydrogen-conducting line. The invention also relates to a method for operating the combined system.

The present application relates to the technical field of combustor, in particular to a kind of low-nitrogen combustor of roasting furnace natural gas based on cyclone and staged combustion, solve the problem that more nitrogen oxides can be produced in the combustor in the prior art;It includes outer sleeve, inner sleeve and inner core tube, the outer sleeve is sleeved on the outside of inner sleeve, air flow channel is formed between the outer sleeve and inner sleeve, the inner core tube is connected to the inside of inner sleeve, the inner sleeve is formed with natural gas flow channel through inner core tube, the inner wall of outer sleeve is formed with first rifling, the inner wall of inner sleeve is formed with second rifling, spiral groove is formed on the inner core tube and penetrates both ends;The scheme utilizes multiple rifling structures to make air and gas produce cyclone, improve mixing effect, enhance the radiation heat transfer effect of combustion in the furnace on furnace wall, increase the thermal efficiency of equipment, reduce energy waste, compared with conventional direct injection type combustor, NOx is reduced by 40.7%, and flame length is nearly 2 times of conventional direct injection type.

Processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Pyrolysis in the presence of an inert gas is employed to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The present disclosure relates to a process for producing sponge iron from iron ore, comprising the steps of: - charging iron ore into a direct reduction shaft (211), - introducing a hydrogen-rich reducing gas (215) into the direct reduction shaft to reduce the iron ore and produce sponge iron (209), - removing a top gas (216) from the direct reduction shaft, - splitting the top gas into a recycle stream (218) and an extract stream (256), - processing the extract stream through a separation unit (257) to provide a hydrogen-rich off-stream (258) and an inerts-rich off-stream (259), - introducing the recycle stream and the hydrogen-rich off-stream into the direct reduction shaft as constituent parts of the hydrogen-rich reducing gas. The present disclosure further relates to a system for producing sponge iron.