44results about How to "Increase gasification reaction rate" patented technology

The invention discloses a biomass and coal fluidized bed co-gasification method. The method comprises the following steps: biomass and coal are crushed and mixed to form biomass-coal mixture, the biomass-coal mixture is added to a fluidized bed gasification outer barrel and is gasified under the effect of a gasifying agent, and gas generated by gasification reaction is discharged through a cyclone separator; meanwhile, the biomass-coal mixture is added to a combustion inner barrel, coal coke which is not gasified in the gasification outer barrel and the entered compressed air are subjected to combustion reaction, and then ascend along the gasification inner barrel; and the coal coke enters an inertia separator to be gasified circularly along with a combustion gas flow, high-temperature flue gas and the biomass-coal mixture are subjected to countercurrent heat exchange and are discharged by a cyclone separator, and ash residue is discharged from the bottom. According to the biomass and coal fluidized bed co-gasification method, the gasification process and the combustion process of the biomass and coal are separated, the circulation of high-temperature material provides heat for the gasification reaction, heat is also directly exchanged through the thermal radiation and convection of a combustion chamber and a gasification chamber, the heat loss is reduced, meanwhile the production efficiency is improved, and the heat value of synthesis gas is high.

The invention discloses a combined trough-tower concentration manner-based solar gasification system which comprises an intermediate-temperature trough solar pyrolysis absorption reactor, a high-temperature rotating solar gasification reactor, a cyclone separator, an afterheat recovery device, a gas purification device, a heliostat field and a hyperboloid reflector. According to the system, different types of solar concentration devices and reactors are adopted for sequentially and independently finishing the pyrolysis and gasification reaction of a solid fuel, the intermediate-temperature trough solar pyrolysis absorption reactor is used for realizing the pyrolysis reaction of the solid fuel to obtain tar and coke at first, the heliostat field and the hyperboloid reflector are further used for acquiring high-concentration rate solar energy, and the high-temperature rotating solar gasification reactor is used for finishing reaction such as tar cracking and coke gasification; by the system, biomasses are efficiently gasified, the irreversible loss in a concentration gasification process is reduced, and the tar content of synthetic gas obtained by gasification is reduced.

This invention discloses method and differential-speed bed furnace for catalytically gasifying high-ash, high-sulfur and high-ash-melting-point coal abundant in China. The hearth is set in a pressure shell. The hearth comprises a lower hearth and an upper hearth. The lower hearth is a chamber with a wide bed diameter, working at a low speed and high temperature. There are inlets for air, coal powder, limestone, steam and catalyst on both the bottom and lateral side of the lower hearth. The upper part of the lower hearth tapers to form the upper hearth working at a high speed and high temperature. The upper hearth has a shorter inner diameter than the lower hearth. The outlet of the upper hearth is connected with a cyclone separator with the lower part connected with a falling pipe. The lower part of the falling pipe is connected with a horizontal L-shaped valve. The other end of the L-shaped valve is connected with the lateral underside of the lower hearth.

The invention discloses a device for separating carbon dioxide through chemical-looping combustion in a coal pressurizing high-density recirculating fluidized bed. Gasification reaction is carried out on coal particles and a gasification agent in a pressurizing high-density recirculating fluidized bed fuel reactor 1; and a gasification product and an oxygen carrier returning back to the fuel reactor 1 performs redox reaction to generate CO2 and H2O. The device comprises the pressurizing high-density recirculating fluidized bed fuel reactor (1), a primary cyclone separator (2), a primary dipleg (3), a fresh oxygen carrier particle feeder (4), a cross flow moving bed air reactor (5), a grid plate (6), an inactivation oxygen carrier discharging device (7), a primary material returner (8), a primary exhaust pipe (9), a secondary cyclone separator (10), a secondary exhaust pipe (11), a secondary dipleg (12) and a secondary material returner (13). By using the device in the invention, the reaction matching problem caused by the quantity grade difference existing in combustion and the oxygen carrier reaction rate is solved, thus the combustion efficiency of the coal, the separated CO2 concentration and the final gathering rate of the CO2 are greatly improved.

The invention relates to a CFB (circulating fluidized bed)-entrained flow bed combined gasification method and device and solves the problems of poor coal applicability and low carbon conversion ratein the prior art. With the adoption of combination of a CFB reactor and an entrained flow bed reactor, the method comprises steps as follows: low-rank coal containing a catalyst reacts with a gasifying agent in the CFB reactor to produce synthesis gas rich in methane, ash residues serving as the raw material and the catalyst of the entrained flow bed reactor are sent into the entrained flow bed reactor through nozzles to impact with high-rank coal or petroleum coke and subjected to a reaction under the action of the gasifying agent, synthesis gas is produced, therefore, carbon residues in theash residues of the CFB reactor are effectively utilized, the carbon conversion rate is increased, and wide raw material adaptability to the low-rank coal, the high-rank coal and petroleum coke is realized.

The invention discloses a biomass gas making system and a biomass gas making technology based on microwave heating. The biomass gas making system comprises a microwave gasifier, a heat exchanger, a cleaning and dedusting device and a gas accumulation device, wherein the microwave gasifier, the heat exchanger, the cleaning and dedusting device and the gas accumulation device are sequentially connected; the heat exchanger is used for carrying out heat exchange with gas generated by the microwave gasifier; air and water enter the heat exchanger from one end of the heat exchanger and can be input into the microwave gasifier through the other end of the heat exchanger after being subjected to the heat exchange with the gas generated by the microwave gasifier; a residue outlet of the cleaning and dedusting device is connected with the microwave gasifier. The biomass gas making system disclosed by the invention has the beneficial effects that a biomass gasifying conversion process can be strengthened by utilizing the combined action of heat of materials per se and microwave auxiliary heating, the temperature needed for splitting and gasifying of plant materials can be rapidly reached, the gas production rate is high, and efficient and clean energy conversion on biomass type waste resources can be realized; sensible heat and waste heat which are generated during a gas making process can be fully utilized, the heat utilization rate is high, and the energy source is saved; automatic feeding and automatic discharging can be realized by the whole gas making device, the automation degree is high, and the safety is high.