34results about How to "Reduce sensible heat loss" patented technology

The invention belongs to the technical field of chemical coal made gas, and particularly relates to a coal gas production method and device using high-temperature rich oxygen and high temperature steam as a gasification agent. The coal gas production method and device adopt oxygen-enriched air with the oxygen concentration of 25 ~ 30% and with the oxygen temperature of 120 ~ 220 DEG C and the high temperature steam with the temperature of 120 ~ 220 DEG C as the gasification agent for coal gas production; and accordingly, an oxygen-enriched air source and related a heat exchanger, a control valve and pipelines are additionally arranged in an original coal gas production device. The coal gas production method and device well overcome the technical defects of coal gas production by use of a traditional atmospheric-pressure fixed bed gas producer, increase the coal gas producer yield and the coal gas calorific value, reduce the carbon content of ash, and reduce sensible heat loss, and the coal gas unit consumption is reduced by 10 ~ 30%.

The invention provides a high-temperature coal gas filtering and purifying device and method for a static bed. The device and the method are characterized in that cinder dust or semicoke serves as a filter material. Raw coal gas enters the device from the bottom of the device, and passes through a filter material layer through a coal gas passage of a tower grid, so that motes in the raw coal gas are adsorbed to gaps in the cinder dust and micropores in the surface of the cinder dust, and purified coal gas is output to a user's device through a purified coal gas outlet. When approaching to a saturated condition, the filter material falls down slowly into a water basin, a coal gas box and a water sealing partition rotate slowly as external power is transmitted to a ratchet wheel, and the water basin (containing the filter material), the tower grid and the coal gas box which are welded into a whole, and saturated cinder dust is exhausted out of the device step by step. Moreover, two grades of sealing bell jars of a feeding mechanism are opened and closed alternately to feed a new filter material, so as to maintain the height of the filter material layer. Therefore, the filtering continuity and the purity degree of coal gas are ensured.

A coke gasification process comprises the steps that coarse coal gas carrying oil-containing dust enters a cyclone separator for separation, separated gas is mixed with the coarse coal gas carrying oil-containing dust entering the cyclone separator, re-separation is performed to obtain coarse coal gas and oil-containing dust; the coarse coal gas enters an integrated waste heat recovery device and sequentially passes through an overheater, a heat recovery device II, a heat recovery device I for staged heat recovery and then is discharged to a cooler through a recovered waste heat and coarse coal gas outlet, and recovery heat generates steam at the three levels of low-pressure saturation, middle-pressure saturation and overheating. The coke gasification process has the advantages that no washing coal gas water is produced, coal gas waste heat can be recycled in a staged mode, and meanwhile different levels of steam are produced.

The invention discloses oxygen-rich continuous gasification technology for a coupled fixed bed, wherein a solid raw material comprises coal or coke, and a gas raw material comprises oxygen, air and steam; and the oxygen can be mixed with the air into oxygen-rich air first and then is sent into a gas-making furnace, and can also be sent into the gas-making furnace in the form of single gas. The technology is characterized in that the gas-making furnace is that two common gas furnace bodies (A and B) are connected into a whole by a pipeline and a valve, two furnaces alternately upward blow to make gas, and the gas raw material can also comprise carbon dioxide; and the gas-making process comprises the step of the blowing-off of the A and B furnaces, the step of upward blowing of the A furnace, the step of secondary blowing-off of the A and B furnaces, and the step of upward blowing of the B furnace, and the steps are circulated. The gas-making furnace is that the two common gas furnace bodies are connected into a whole by the pipeline and the valve, and the two furnaces alternately upward blow to make gas, so the technology can optimize the distribution of temperature fields in the gas furnaces, reduce the sensible heat loss of semiwater gas, the erosion to pipelines in subsequent working procedures, and the quantity of carry-overs, improve the condition of gas quality, and reduce gas consumption and coal consumption.

The invention relates to a gas-making furnace jacket fused salt heat exchanging system. The system comprises a gas-making furnace and also comprises a fused salt storage tank, wherein the outlet of the fused salt storage tank is connected with the inlet of a fused salt pump; the outlet of the fused salt pump is connected with the inlet of a jacket boiler; the outlet of the jacket boiler is connected with the inlet of a heat exchanger; the outlet of the heat exchanger is connected with the inlet of the fused salt pump; and the medium in the fused salt storage tank is liquid-state fused salt. The technical scheme shows that the liquid-state fused salt in the fused salt storage tank is cycled through the fused salt pump and then fed to the gas-making furnace jacket boiler for further cycle heating, and then heats soft water by the heat exchanger to generate saturated steam, and then the steam is self-used by overheating or externally supplied; and the fused salt is adopted to replace the soft water to be used as a heat-transfer medium, so that the temperature in the jacket boiler is increased, thereby reducing the heat taken away by the heat-transfer medium in the jacket boiler, reducing the loss of sensible heat in the gas-making furnace, improving gasification efficiency and greatly improving the cold wall effect of the gas-making furnace jacket boiler.

The invention relates to a solar refrigerating device used for manual freezing of a water-rich loose and soft foundation. A heat collecting system and a steam injecting refrigerating system are included. The heat collecting system comprises a full-glass vacuum heat collecting pipe and a generator; the cylindrical generator is embedded in the tubular heat collecting pipe, and closed heating mediummedia are arranged between the two; and a gravity circulating manner is adopted for the steam injecting refrigerating system which comprises an evaporator embedded in a water-rich loose and soft ground layer, a condenser, a throttling valve, a steam injector, a one-way valve and the like, and the condenser, the throttling valve, the steam injector and the one-way valve are arranged on the ground surface. The device is vertical type refrigerating integrated machine, solar thermal energy and gravitational potential energy are combined for driving a refrigerating agent to circulate, no movement parts exist, consumption of electric energy and mechanical energy is avoided, running is reliable, and the service life is long. The device can be used for reinforcing weak cementation, large hole gapand water-rich unstable ground layers in engineering of excavating, traversing, filling and the like, and is especially suitable for preventing and controlling the hot melting disease of ice-rich foundations in linear engineering of long-distance railways, highways and power transmission lines in permafrost regions.

A cyclone separator for crude gas dust removal in crushed coal pressurized gasification comprises a cyclone dust collector (1) and a dust tank (13). The cyclone dust collector (1) comprises an outer cylinder (11) and an inner cylinder (5). The upper portion of the outer cylinder (11) is vertical, the lower portion of the outer cylinder (11) is conical, and the outer cylinder (11) is composed of an outer cylinder outer wall (8) and an outer cylinder inner wall (9). The inner cylinder (5) is fixed to the outer cylinder inner wall (9) through a stretching part (10). A gas inlet (2) is connected with the lower portion of the inner cylinder (5) through the outer cylinder (11), and a gas outlet (3) is located in the top end of the outer cylinder (11). A cyclone dust collector hot water outlet (7) is formed in the upper portion of the outer cylinder outer wall (8), and a cyclone dust collector hot water inlet (6) is formed in the lower portion of the outer cylinder outer wall (8). A bottom end outlet of the outer cylinder (11) is connected with the top end of the dust tank (13) through an oily dust discharge valve (4). The cyclone separator for crude gas dust removal in crushed coal pressurized gasification has the advantages of being high in oily dust removal efficiency, free of wastewater generation, high in treatment capacity and high in operation flexibility.

The invention discloses a device and method for preparing fuel through biomass gasification, and the device comprises a gasification furnace which is provided with a biomass inlet, a water vapor inlet, an oxygen inlet and a crude synthesis gas outlet, and biomass reacts with oxygen and water vapor in the gasification furnace to generate crude synthesis gas, the dielectric barrier discharge reactoris provided with a first-stage liquid-phase synthesis reactor, and the first-stage liquid-phase synthesis reactor is used for reacting the crude synthesis gas generated by the gasification furnace togenerate gas fuel. The dielectric barrier discharge reactor is also provided with a secondary liquid-phase synthesis reactor, and the secondary liquid-phase synthesis reactor is used for reacting theexhaust gas generated by the primary liquid-phase synthesis reactor to generate gas fuel. The device disclosed by the invention is simple, does not need a complex synthesis gas purification system, and is easier to realize distributed utilization of biomass, all components of the biomass gasified gas can be utilized, a carbon dioxide removal reaction is not needed, the energy consumption of the device is reduced, and the utilization rate of a carbon element is improved.

The invention provides an adsorption recovery system for nitrogen regeneration and an adsorption recovery method thereof, which belong to the field of adsorption recovery. The system comprises waste gas input equipment, primary adsorption equipment and secondary adsorption equipment which are connected in sequence, and further comprises a nitrogen replacement pipeline, and a primary circulating nitrogen desorption pipeline and a secondary circulating nitrogen desorption pipeline which are connected with the primary adsorption equipment and the secondary adsorption equipment respectively, the primary circulating nitrogen desorption pipeline and the secondary circulating nitrogen desorption pipeline are respectively communicated with the nitrogen replacement pipeline; desorption gas condensation recovery equipment is arranged on each of the primary circulating nitrogen desorption pipeline and the secondary circulating nitrogen desorption pipeline; wherein the primary adsorption equipmentcomprises at least two adsorption tanks which are connected in parallel, and the secondary adsorption equipment is an adsorption rotating wheel. By adopting the system and the method provided by theinvention, the specification of the adsorption device can be obviously reduced, the filling amount of the adsorption material is greatly reduced, the switching period is greatly shortened, the safetyis high, and the energy consumption is reduced.

The invention provides a fixed bed gasifier, a production system and a production method thereof, and relates to the technical field of coal gas manufacturing equipment. The fixed bed gasifier provided by the invention comprises a furnace body with a feed inlet, a feeding mechanism connected with the furnace body, a fire grate mechanism horizontally and rotatably arranged in the furnace body and a transmission device for driving the fire grate mechanism to rotate. The gasifier has the advantages of efficient and energy-saving structure, convenient transportation and installation, reasonable height-diameter ratio, helps to increase the height of a material layer, not only reduces the sensible heat loss, but also improves the steam taste. The invention further provides a production system which comprises the fixed bed gasifier and other auxiliary purification equipment. The discharge amount of dust, suspended solids and steam in the coal gas is reduced, so that the temperature of a coal gas outlet is very low, and the subsequent coal gas treatment pressure is reduced. The invention also provides a production method for producing coal gas by using the production system, so that the effective gas in the coal gas can reach more than 90%, the steam decomposition rate reaches more than 85%, the residual carbon content is about 2%, and the gasification intensity reaches more than 2000m <3>/m<2>.h.