39results about How to "High effective gas content" patented technology

The invention relates to a method and a device for gasification, in particular to the method and the device for serial gasification of a fixed bed and a fluidized bed, wherein the method comprises the following steps: 1) feeding a gasification raw material with the particle size of between 13 and 50 millimeters and a gasification agent to a fixed bed gasifier to perform gasification reaction so as to generate coal gas and ash content, discharging the ash content from an ash discharging opening of the fixed bed, and introducing the coal gas to the lower part of a dense phase zone of a fluidized bed gasifier; 2) feeding a thin particle shapeed coal gasification raw material with the particle size of between 0.5 and 8 millimeters and the gasification agent into a fluidized bed gasifier to perform gasification reaction with the vertically raising coal gas so as to generate the coal and the ash content, discharging the ash content from the ash discharging opening of the fluidized bed, and introducing the coal gas into a cyclone separator; and 3) performing gas-solid separation on the coal gas in the cyclone separator, outputting the coal gas from a coal gas outlet of the cyclone separator, and sending back solid particles carried by the coal gas to the fluidized bed gasifier through a dipleg of the cyclone separator to perform the gasification reaction continuously. The method and the device have quite important significance on improving the economic benefit and reducing the sewage treatment cost for the medium and small-sized coal chemical enterprises in China.

The invention provides a start-up compound burner for a water-coal-slurry or coal dust pressure gasification furnace. The start-up compound burner comprises a fuel gas passage pipe and a combustion-supporting gas passage pipe which are coaxially sheathed with each other and respectively arranged inside and outside, and ignition electrodes, wherein the fuel gas passage pipe is connected with the combustion-supporting gas passage pipe through two flanges, the two flanges are sealed by a gasket, the size of an annular space between a flow passage at the front end of the combustion-supporting gaspassage pipe and the fuel gas passage pipe is adjusted by the thickness of the gasket, and the ignition electrodes are arranged outside the combustion-supporting gas passage pipe and extended to the front ends of the fuel gas passage pipe and the combustion-supporting gas passage pipe. The start-up compound burner has the advantages of compact structure and space saving. The burning of various fuel gases can be realized by adjusting the fuel gas passage. During the actual operation, the burner can automatically ignite and keep temperature rise stable. Besides, the invention can also lower thework intensity of on-site personnel, and can perform continuous operations of baker and chemical industrial feeding without being dismantled after the installation in cold conditions.

The invention relates to a nozzle for increasing carbon conversion rate of a pulverized coal entrained-bed gasifier. The nozzle comprises outer water-cooled sleeves, an inner water-cooled sleeves, outer ring spray heads and inner ring spray heads which are coaxial from the outside and inside, wherein a cooling water leading-out channel is arranged between the outer water-cooled sleeves and the inner water-cooled sleeves, a cooling water introduction channel is arranged between the inner water-cooled sleeves and the outer ring spray heads, an outer ring channel is arranged between the outer ring spray heads and the inner ring spray heads, the inner ring spray heads form an inner ring channel, a front end water-cooled chamber is arranged at an outlet of the cooling water leading-out channel and an outlet of the outer ring channel is provided with a plurality of cyclones symmetrically. According the invention, the flow field in the gasifier is changed by designing the gasifier nozzle to enhance the mixing of pulverized coal and air flow, thereby prolonging the residence time of the particles and ultimately improving the carbon conversion rate in pulverized coal.

The invention discloses a coal slurry concentration increasing and industrial wastewater treating process and device. The process comprises the following steps: (1) crushing coal, and then adding water and a dispersant for coarse grinding till the particle size is 50 microns or below, thus obtaining slurry 1; (2) performing shaping grinding on 25 to 35 weight percent of slurry 1 till the particle size is 20 to 30 microns, thus obtaining slurry 2, and pumping the residual slurry 1 serving as a water coal slurry product into a water coal slurry storage tank for gasification; (3) performing ultrafine grinding on 15 to 25 weight percent of the slurry 2 till the particle size is 5 to 10 microns, thus obtaining slurry 3, and conveying the residual slurry 2 and the newly obtained slurry 3 into the coarse grinding stage for coarse grinding, wherein after the coarse grinding in the step (1) and the steps (2) and (3) are repeatedly performed for multiple times, the aim of effectively increasing the concentration of the slurry 1 is fulfilled. In the concentration increasing process, used water can be replaced with industrial wastewater. According to the coal slurry concentration increasing and industrial wastewater treating process disclosed by the invention, the concentration of the coal slurry can be increased by at least 3 percent; the gasification energy consumption can be substantially reduced; the coal slurry concentration increasing and industrial wastewater treating process has the characteristics of safety, reliability, convenience in improvement and obvious economical benefits.

The invention relates to a technological method for preparing oil products by the Fischer-Tropsch synthesis. In the technological method, a FT synthesis process comprises a first-stage FT synthesis process and a second-stage FT synthesis process; in particular, the technological method comprises the following steps: (1) synthesis gases are subjected to FT synthesis reaction in a first-stage synthesis reactor; (2) a part of tail gases from the first-stage synthesis reactor are circularly returned to an entrance of the first-stage synthesis reactor, and another part of the tail gases enter a second-stage synthesis reactor for the further FT synthesis reaction; (3) a part of tail gases from the second-stage synthesis reactor are circularly returned to an entrance of the second-stage synthesis reactor, and another part of the tail gases are used for reclaiming low-carbon hydrocarbons and hydrogen gases and then are used as fuel gases; and (4) by utilizing the recovered hydrogen gases, thehydrocarbon products in the first-stage synthesis reactor and the second-stage synthesis reactor and the hydrocarbon products which are obtained by separating and recovering the tail gases are subjected to hydrogenation and purification and then are fractionated to generate various oil products. Compared with prior art, the technological method has the characteristics of economy, flexibility, lowcost and the like.

The invention relates to a slag gasifier for a pressurized fixed bed. The slag gasifier comprises a coal lock for intermittently taking coal from a bunker and feeding the coal into a pressurized gasifier container, a transition bin enabling the coal in the coal lock to be fed in the pressurized gasifier container conveniently, the pressurized gasifier container for combusting and gasifying carbon-containing solid fuels at a certain temperature and with certain pressure by virtue of a gasifying agent from a nozzle, a connection pup joint for gasifying operations of slagging, chilling, evacuation and the like, a chilling chamber for chilling and cooling molten slag and a slag lock for storing vitric slag particles and discharging the vitric slag particles to the outside by a cone valve. An operation method of the slag gasifier comprises the steps of adjusting the temperature of a raw gas outlet, gasifying carbon-containing solid fuels, adjusting the gasifying load of the gasifier, controlling the operation pressure of the gasifier, controlling the pressure difference between the connection pup joint and the gasifier, slag discharge of a slag discharging port and slag support operations, chilling and cooling molten slag, controlling water quantity of the chilling chamber to remove heat of the molten slag, storing slag particles and discharging the slag particles to the outside.

The invention relates to a slag gasification reaction furnace for preparing carbon monoxide, and a gas preparation method thereof, belongs to the fields of coal chemical industry, coke (containing semi-coke) gasification, fuel gas and the like, and relates to chemical engineering, a chemical process, chemical machinery, an instrument and an automation technology. The slag gasification reaction furnace comprises a gasification furnace body, a slag hole, a combustion short section, a chilling chamber and an automatic coke adding machine, wherein the gasification furnace body comprises a shell, an upper barrel, a hearth inlet, a coal gas outlet, lining refractory bricks, a water jacket, a gasifying agent nozzle, a water cooling coil pipe, a slag pool, a furnace cover and a large connecting flange. According to the invention, due to the adoption of slag gasification and liquid deslagging, the gasification temperature is high, the carbon conversion rate is improved, the effective gas content is high, the operation energy consumption is low, the cost is low, the methane content is low, the raw coal application is wide, the investment is saved, the equipment is completely domesticated, the maintenance is convenient, the operation is simple and feasible, the requirements of safety, environmental protection and energy conservation are met, and the pure oxygen continuous gasification technology is upgraded.

The invention provides high-concentration sludge coal slurry, a preparation method and an application thereof. The mass concentration of the high-concentration sludge coal slurry is 64%-68%, the masspercent of sludge is 1%-30%, the mass percent of coal powder is 30%-68%, and the proportion between the dry base content of particles with the granularity being less than or equal to 75mum in the sludge coal slurry and the total base content of the sludge coal slurry is more than or equal to 30%. The high-concentration sludge coal slurry, the preparation method and the application provided by theinvention have the beneficial effects that the mass concentration of the coal water slurry is at least increased by 3-6 percent points, the fluidity, stability and atomizing property of the coal slurry are respectively greatly improved, the sludge treating cost is reduced, the heat value of the sludge is also effectively utilized, the process flow is simple, the operability is strong, the energy consumption is low, the production requirements for long-period safety and continuity are met, and the high-concentration sludge coal slurry can meet the requirements of gasification and burning of thecoal water slurry.

The disclosure relates to a coupled gasification system and method for pulverized coal and lump coal, the system includes a lump coal gasifier and a pulverized coal gasifier; the pulverized coal gasifier has a pulverized coal gasification reaction chamber, a pulverized coal inlet, and a gasification agent inlet The lump coal gasification furnace has a lump coal gasification reaction chamber, a lump coal inlet, a gas inlet, a slagging port and a crude gas gas outlet; the gas inlet is connected with the pulverized coal gasification reaction chamber, so that the gas generated by the reaction in the pulverized coal gasification reaction chamber It enters the lump coal gasification reaction chamber from the gas inlet, and reacts with the lump coal gasification; the slag outlet is connected with the pulverized coal gasification reaction chamber, so that the solid particles produced by the reaction in the lump coal gasification reaction chamber enter from the slag outlet to the Combustion and gasification reactions occur in the pulverized coal gasification reaction chamber, thereby realizing the simultaneous gasification of pulverized coal and lump coal, so as to balance the uneven supply and demand of pulverized coal and lump coal, and improve the utilization rate and conversion rate of coal.

The invention discloses a sulfur-resistant methanation system and method for coal-based natural gas, which belongs to the technical field of coal-based natural gas; firstly, a coal gasification process combining crushed coal gasification and pulverized coal gasification is adopted, and an adiabatic reactor and a homogeneous temperature reactor are used in conjunction with each other. The combined sulfur-resistant methanation process performs methane synthesis on the crude gas to increase the effective content of methane in the synthesis gas and reduce the reaction load of the subsequent section, and then remove the sulfide and carbon dioxide in the raw gas through a conventional purification process, and finally through adiabatic The deep methanation process combining the reactor and the uniform temperature reactor produces qualified natural gas for civil use; this process system realizes the comprehensive utilization of raw coal, effectively reduces the production load of the methanation process, and reduces the size of the reactor and pipeline equipment , improve the unit production capacity, and make full use of the strong exothermic characteristics of the methanation reaction to produce medium-pressure steam and high-quality supersaturated steam, rationally utilize the heat in the process system, reduce energy consumption, and increase production efficiency.

The invention relates to a device for optimizing a combustion flow field of a pulverized coal gasification furnace, which is beneficial to stable combustion and promotes the gasification process. The device for optimizing the combustion flow field of the pulverized coal gasification furnace comprises a pulverized coal main burner, an ignition burner, an oxygen system, a pulverized coal system, a cooling water system, the gasification furnace, a gas storage tank, a gas adjusting device and a flow measuring device, and an oxygen feeding system, a pulverized coal feeding system and the cooling water system are arranged on a pulverized coal burner body. An ignition device is arranged at the upper part of the pulverized coal burner body, the center of the pulverized coal burner body is an optimizing device air inlet channel and is used for adjusting burner atomization and optimizing the combustion flow field, the burner center air inlet is supplied by a storage tank, and a measuring device and an adjusting device are arranged on the combustion flow field optimizing device. And the lower part of the pulverized coal burner body is provided with a pulverized coal gasification furnace, and synthesis gas generated by combustion reaction is sent out of a boundary area. In the operation stage of the gasification furnace, the combustion flow field is improved by adjusting the central gas flow of the burner, so that the conversion rate of coal is increased.

The invention discloses a system and a method for catalytic purification treatment on a coal chemical industry crude synthesis gas. The system comprises a molten salt catalysis reaction device and a secondary purification device, wherein the molten salt catalysis reaction device is filled with molten salt; the secondary purification device is filled with an adsorbent. When the system is used, the crude synthesis gas is fed into the molten salt catalysis reaction device; fine coal powder, semi-coke granules, tar and phenolic substances in the crude synthesis gas sufficiently contact the molten salt under the viscous capturing action of the molten salt, and are subjected to catalytic cracking, gasification and reforming reaction under the action of gasses such as H2, CO, CO2 and H2O(g) in the crude synthesis gas, and then the crude synthesis gas can be purified; the crude synthesis gas purified in the molten salt catalysis reaction device is fed into the secondary purification device, and the molten salt carried by the crude synthesis gas can be desorbed through the absorbent in the secondary purification device.

The invention relates to a Fischer-Tropsch synthetic oil process circulation tail gas treatment method. The method is characterized in comprising the following steps: circulation tail gas is subjected to heat exchange with synthesis gas from a combined catalysis and reforming reactor through a first heat exchanger, and is divided into two streams; a first stream of the circulation tail gas enters a plasma generator; a second stream of the circulation tail gas enters a gas mixer and is mixed with a certain proportion of high-pressure steam, such that water content in the raw gas is adjusted; mixed gas from the mixer and plasma gas from the plasma generator are respectively injected into the combined catalysis and reforming reactor from a top inlet of the combined catalysis and reforming reactor; the gases are mixed, and the mixed gas enters a catalytic reaction part and is subjected to a combined catalysis and reforming reaction; synthetic gas from the combined catalysis and reforming reactor is subjected to heat recovery, and a liquid phase is separated, such that the gas can be recycled as circulation tail gas.

The invention relates to a method and a device for gasification, in particular to the method and the device for serial gasification of a fixed bed and a fluidized bed, wherein the method comprises the following steps: 1) feeding a gasification raw material with the particle size of between 13 and 50 millimeters and a gasification agent to a fixed bed gasifier to perform gasification reaction so as to generate coal gas and ash content, discharging the ash content from an ash discharging opening of the fixed bed, and introducing the coal gas to the lower part of a dense phase zone of a fluidized bed gasifier; 2) feeding a thin particle shapeed coal gasification raw material with the particle size of between 0.5 and 8 millimeters and the gasification agent into a fluidized bed gasifier to perform gasification reaction with the vertically raising coal gas so as to generate the coal and the ash content, discharging the ash content from the ash discharging opening of the fluidized bed, and introducing the coal gas into a cyclone separator; and 3) performing gas-solid separation on the coal gas in the cyclone separator, outputting the coal gas from a coal gas outlet of the cyclone separator, and sending back solid particles carried by the coal gas to the fluidized bed gasifier through a dipleg of the cyclone separator to perform the gasification reaction continuously. The method and the device have quite important significance on improving the economic benefit and reducing the sewage treatment cost for the medium and small-sized coal chemical enterprises in China.

The invention relates to a fixed-bed pure-oxygen continuous gasification device and process adaptable to diversified coals. According to the device and the process, CO2, pure oxygen and superheated steam serve as gasifying agents and subject to a gasification reaction with feed coal in a fixed-bed pure-oxygen continuous gasifier, so as to generate gasified coal gas; the gasified coal gas enters a dust remover so as to remove solid particles from the gasified coal gas, and a water cooler is arranged at the upper part of the efficient dust remover and is used for recovering part of sensible heat from the gasified coal gas; the gasified coal gas subjected to dust removal enters a heat-pipe heat exchanger for heat recovery, and low-pressure steam is a byproduct; and low-temperature gasified coal gas enters a low-pressure coal gas scrubbing tower for final cooling and dust removal, and scrubbed water gas is connected and conveyed to a gas tank. The content of CO and H2 in the gasified coal gas can reach 80% or more, the ratio range of adjustment of CO among ingredients of the coal gas is 40-65%, the ratio range of adjustment of H2 among the ingredients of the coal gas is 5-40%, and the gasified coal gas can serve as raw material gas of a variety of chemical products through being subjected to further deep treatment by processes such as conversion and purification.

The invention provides a start-up compound burner for a water-coal-slurry or coal dust pressure gasification furnace. The start-up compound burner comprises a fuel gas passage pipe and a combustion-supporting gas passage pipe which are coaxially sheathed with each other and respectively arranged inside and outside, and ignition electrodes, wherein the fuel gas passage pipe is connected with the combustion-supporting gas passage pipe through two flanges, the two flanges are sealed by a gasket, the size of an annular space between a flow passage at the front end of the combustion-supporting gaspassage pipe and the fuel gas passage pipe is adjusted by the thickness of the gasket, and the ignition electrodes are arranged outside the combustion-supporting gas passage pipe and extended to the front ends of the fuel gas passage pipe and the combustion-supporting gas passage pipe. The start-up compound burner has the advantages of compact structure and space saving. The burning of various fuel gases can be realized by adjusting the fuel gas passage. During the actual operation, the burner can automatically ignite and keep temperature rise stable. Besides, the invention can also lower thework intensity of on-site personnel, and can perform continuous operations of baker and chemical industrial feeding without being dismantled after the installation in cold conditions.