40results about How to "Reduced compression energy consumption" patented technology

The invention relates to method and device for gasifying a multi-segment staged converted fluidized bed. The method comprises the following steps of: supplying coal; supplying gas; gasifying; slagging; and conveying fine powder. The device for gasifying the multi-grade staged converted fluidized bed comprises an agglomerating ash separating unit, a pyrolyzing and gasifying reactor of the multi-segment staged fluidized bed and a semicoke fine powder cyclic feeding unit. The invention has the advantages of high volume utilization rate of a gasifying oven, great handling capacity and high utilization rate of total carbon, is suitable for a coal staging and converting system and can be singly used for producing gas for mass coal-based methane synthesis and coal chemical industry.

The invention discloses a method for coal gasification in a combined type fluidized bed, which comprises coal preparation, gas supply, gasification, slag discharge, dedusting, waste heat recovery and fine powder conveying. An ash agglomeration fluidized bed realizes gasification of large-particle coal; the non-completely converted carryover fine powder enters an entrained flow bed gasifier in a dense phase pneumatic conveying manner; secondary gasification is carried out by using a short retention time high temperature gasification manner; the produced ash slag is carried into an intersection segment of the fluidized bed and the entrained flow bed with high temperature coal gas, and rapidly mixed with ''low temperature'' large-particle partially carbonized coal in the fluidized bed and the produced ''low temperature'' coal gas; and partial ash slag is selectively discharged out of the gasifier in the form of solid. The method and the device of the invention have the advantage of being suitable for various coal types and high in carbon conversion rate.

The invention provides a coal combustion apparatus capable of separating carbon dioxide, which is mainly formed by connecting a fuel reactor, a primary cyclone separator, a dipleg and an air reactor in series; wherein the lower part of the fuel reactor is provided with a mixing chamber with large cross section, and the upper part thereof is provided with a lifting tube with small cross section; and the height of the lifting tube is over three times higher than that of the mixing chamber. The invention also provides a method using the coal combustion apparatus capable of separating the carbon dioxide to separate the carbon dioxide. The fuel reactor adopts the structure of a reactor with long residence time, internal circulation can be formed by granules, and the gas-solid turbulence is improved; the air reactor adopts a moving fluidized bed to ensure the operation to be stable, so that the heat can be evenly released; meanwhile, a heat exchanger is arranged inside the bed, so that coking caused by local overheating since a great deal of heat is released in a centralized way in oxidation reaction can be avoided. Furthermore, the fuel reactor and the air reactor run under the pressure, so that the equipment can be compact, the utilization efficiency of system energy is high, and the subsequent carbon dioxide compression energy consumption is reduced.

The invention provides a technical method for separating ethylene from ethylene containing mixed gas. The technical method comprises a gas pretreatment process, an absorption process, a desorption process and an ethylene refining process, wherein a novel absorbing agent of trimethylbenzene is adopted, the heat integration methods such as a desorption tower, a middle reboiler, refrigeration of poor ethylene current by pressure recovery turbine and refrigeration recovery are adopted, so that the recovery and the purity of the ethylene can reach more than 99 percent and 91 percent respectively. The technical method can lower power consumption of compression of a system as well as consumption of throttling and low-temperature cooling capacity. Compared with the common ethylene high-pressure cryogenic separation process, the technical method of the invention is easier and is suitably used for recovering and enriching the ethylene from the ethylene containing mixing gas such as refinery dry gas, and the like.

Relating to the field of sodium bicarbonate preparation, the invention provides a production method and production equipment for sodium bicarbonate. The production method of sodium bicarbonate includes the steps of: a) providing solid-liquid mixture containing crude sodium bicarbonate as the reaction raw material, and decomposing the reaction raw material to obtain a decomposition solution containing sodium carbonate and decomposition gas containing CO2; b) subjecting the decomposition gas to purification treatment to obtain carbonization gas, and then introducing the carbonization gas into the decomposition solution for carbonation crystallization reaction, and then conducting solid-liquid separation to obtain sodium bicarbonate and recovered mother liquor. The production method providedby the invention can solve the problems of waste of resources, environmental pollution, high energy consumption and high cost caused by existing sodium bicarbonate production methods, and achieves thetechnical effects of increasing CO2 utilization rate, reducing environmental pollution, and lowering energy consumption and cost.

The invention relates to the technical field of a pressure swing adsorption gas separation technology, and especially relates to a coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and a device thereof. The method comprises the following two-stage process: a first stage is a deoxidation process, and a second stage is a denitrification process; the oxygen concentration in a final product gas obtained by the above concentration method is below 0.3%, and the concentration of methane is above 90%, so that a purpose of purifying coal bed gas can be achieved. The method realizes the purpose of purifying low-concentration coal bed gas to obtain high-concentration methane; a separation process uses methane replacement to replace part of the nitrogen in an adsorption tower, and the methane concentration is increased; the nitrogen produced by a second-stage separation process is used as the purge gas for regeneration of the first-stage adsorption tower, the concentration of methane and oxygen at a first-stage regeneration outlet can be reduced, the danger of the regeneration gas entering the explosion limit can be eliminated, and the safety of the adsorption process can be ensured.

The invention discloses an integrated hydrogenation method for producing clean diesel. The method comprises the following steps of: performing hydrogenation refining on a diesel material with high cetane number in a first hydrogenation reaction area; separating in a thermal high-pressure separator, mixing the separated hydrogen-rich gas and a diesel material with low cetane number, allowing the mixture to enter a second hydrogenation reaction area, performing hydrodesulfurization, hydrodenitrogeneration, aromatics saturation and cycloalkane opening reaction under the action of hydrogenation refining and a hydrocracking catalyst, mixing a liquid-phase material flow obtained by the thermal high-pressure separator and a liquid material in the second hydrogenation reaction area, and allowing the mixture to enter a fractionation system; and finally obtaining the clean diesel and a small amount of naphtha with high aromatic hydrocarbon. By the method, a clean diesel product having the sulfur content of less than 10ppm and the cetane number of more than 51 can be produced. On one set of device, two technological processes are implemented, the flow is relatively simple, the hydrogen utilization rate is high, device investment and operating cost are low, and the process selectivity and economic efficiency are high.

The invention discloses a general combustion and gasification device for a pressurized fluidized bed or a spouted bed for a solid fuel containing carbon and hydrogen, and aims to solve the problems of much flying ash, high carbon content of the flying ash, high carbon content of discharged ash and low coal utilization rate of the solid fuel in the FBC, PFBC or fluidized bed or spouted bed solid fuel gasification device. The device consists of a gas distribution unit, a fuel feeding unit, a pressurized fluidized bed or spouted bed unit and a flying ash treating unit. The device has the remarkable characteristics that the pressurized solid fuel fluidized bed or spouted bed device is changed into a horizontal form from a vertical form so as to be more suitable for the combustion or gasification under a pressurizing condition; the structure is simplified; and a special flying ash treating device is provided for reducing the carbon content of the flying as in product gas and converting the carbon into efficient gas component. The device can be widely applied to the combustion of coal, oil shale or other organic biomass waste, three-waste treatment or production of gas, oil or ammonia and carbon chemistry. The device is particularly suitable for the pressurized fluidized bed or a spouted bed boiler (PFBC) or a coal gasifier, and can also be used in the field (IGCC) of gas-vapor combined cycle and used for boiling furnaces for producing acid from pyrite.

The invention discloses an automatic bag breaking and collecting device and method for resident household garbage. The device simultaneously has three functions of garbage classified throwing, automatic bag breaking and sorting of garbage and garbage compression and volume reduction, and an integrated scheme of manual classified throwing, automatic mechanical bag breaking and sorting, compression and volume reduction, packaging and clearing and intelligent induction is adopted. The effects of classified throwing, automatic bag breaking and sorting and classified packaging and clearing of the household garbage of community residents are achieved, meanwhile, the dual characteristics of humanization and mechanization are achieved, source classification and sorting of the household garbage are facilitated, and garbage recycling and source volume reduction are facilitated. The automatic bag breaking and collecting device and method for the resident household garbage solve the problems of high management difficulty, high management cost and difficulty in realizing effective garbage source classification in the existing community resident household garbage source only depending on the consciousness of residents, and also solves the problems that source classified garbage is not compressed and subpackaged, high garbage clearing cost, heavy pollution on the way of transportation, mixed loading and terminal mixed processing in the garbage classification process and the like are caused.

The invention discloses a technology and a system for preparing synthetic oil by biomass indirect liquefaction. The technology comprises the following steps of biomass pressure gasification, syntheticair purification, oil product synthesis, tail gas decarburization, tail gas oil washing, tail gas reforming, tail gas hydrogen production, oil product processing and tail gas desulfurization; in thebiomass pressure gasification step, the pressure of a gasifier is 3-5MPa (G), the temperature of a drying section in the gasifier is less than 500 DEG C, the temperature of a distillation section is 500-1000 DEG C, the temperature of a gasification section is 1000-1100 DEG C, the temperature of a burning section is 1100-2000 DEG C, and the temperature of a molten slag section is 1700-2000 DEG C; tar generated in the steps of biomass pressure gasification and synthetic air purification is taken as the raw material of an oil product processing step, and the tar is blended with intermediate synthetic oil obtained in the oil product synthesis step to obtain a synthetic oil product. According to the technology and the system thereof, each technology unit and a relevant matching technology are integrally considered, technology optimization is carried out from an integral angle, configuration is reasonable, and the efficient utilization of biomass new energy is realized.

The invention relates to a feed gas recovery method and device, and belongs to the technical field of gas separation engineering. The feed gas recovery method comprises the following steps: step one:lean liquid and feed gas conduct countercurrent contacting in an absorption module to absorb carbon dioxide, and an obtained solution is a rich liquid containing the feed gas; step two: the rich liquid and displacement gas conduct countercurrent contacting in a recovery module to replace the feed gas; Step three: the feed gas is recovered and returned to the absorption module for continuous recycling. The invention also discloses a feed gas recovery device. The feed gas recovery device comprises the absorption module and the recovery module communicating with each other. According to the feedgas recovery method and device, the feed gas in the rich liquid is replaced by the displacement gas under high pressure conditions, and the recovered high-pressure feed gas can be directly returned toan absorption decarburization device of the feed gas or enter subsequent process treatment.

The invention discloses a method for adding rich oxygen in a liquid waste treatment process. The method comprises the following steps of compressing air by an air compressor and improving the pressure to 8-10 MPa; gasifying liquid oxygen stored in a low-temperature liquid storage tank into a gas through a high-pressure evaporator by pressurizing through a low-temperature pump, wherein the pressure also achieves 8-10 MPa, and the oxygen content achieves 30-50% after the gasified oxygen and the compressed air are mixed according to a certain ratio; oxygen-enriched air enters a liquid waste reaction kettle to utilize after being mixed. By adopting the method for adding rich oxygen in the liquid waste treatment process disclosed by the invention, the position of adding oxygen is transformed; the safety of the compressor is improved; energy consumption of the compressor is reduced.

The invention provides a hydrogen separation membrane embedded improved copious cooling liquefying system aiming at an STAR propane dehydrogenation process, and belongs to the technical field of petrochemical engineering. According to the system, starting from the composition characteristics of dehydrogenation reaction products, a hydrogen membrane separation unit is introduced behind a shallow cooling unit, most hydrogen is separated through selective permeation of a membrane, then pressurizing and copious cooling liquefying are further carried out, and propane and propylene are further separated from remaining non-condensable components. By means of the hydrogen membrane separation unit embedded improved copious cooling liquefying system, compression loads can be remarkably reduced whilehigh-concentration hydrogen is obtained, the total compression energy consumption can be reduced by 8-24%, the heat exchange load of a copious cooling unit can be reduced by 80-86%, the purity of thebyproduct hydrogen can be increased from 82 mol% to 99 mol%, and the requirements of hydrogen consumption devices such as hydrocracking devices in the refinery enterprise are met. Under the optimum working condition, by means of the 350,000-ton STAR process, 1020 kW of the compression energy consumption can be reduced, and 16,198 Nm<3>/h of qualified hydrogen is output.

The invention provides a reinforced desorption method of an acidic gas. The method is characterized in that inner groove-shaped micro-channels are introduced to a micro-channel reactor, and desorption process reinforcement of a carbon dioxide absorption liquid is carried out under 0.1-1MPa at 90-160DEG C for 0.01-100s. The micro-reactor comprises a plate heat exchange unit and a plate desorption unit, and the plate desorption unit is formed by the parallel inner groove-shaped micro-channels. The method can realize carbon dioxide desorption in an extremely short time, prevent absorbent overheating and reduce the volume of evaporated water, and has a small size in order to greatly reduce the energy and material consumption in the desorption process of the carbon dioxide absorption liquid and the occupied area. The energy consumption, the material consumption and the occupied area of the reinforced desorption method are respectively 20% or above lower than those of traditional tower desorption systems.

The invention discloses an energy-saving compressor. The energy-saving compressor belongs to a gas compressor and can be used for steam compression-type refrigeration and heating. The energy-saving compressor utilizes a cylinder with a thermostat. When a work temperature of the cylinder is higher than a gas suction temperature, a refrigeration working medium in the thermostat absorbs heat of the cylinder so that the work temperature of the cylinder is reduced and compression energy consumption of the energy-saving compressor is reduced.

The invention discloses a blast furnace oxygen delivery system and a working method. The system comprises a first oxygen delivery system, a second oxygen delivery system and a delivery main pipe; thefirst oxygen delivery system comprises a first delivery pipe, a first fire arrestor, a first stop valve, a first pressure gauge, a first pressure reduction regulating valve, a second pressure gauge, asecond stop valve and a third stop valve; and the second oxygen delivery system comprises a second delivery pipe, a second fire arrestor, a fourth stop valve, a third pressure gauge, a filter, a second pressure reduction regulating valve, a fourth pressure gauge, a third pressure reduction regulating valve, a fifth pressure gauge and a fifth stop valve. According to the system, middle-pressure oxygen and low-pressure oxygen can achieve hierarchical control, it is guaranteed that the low-pressure oxygen with low energy consumption is used firstly, the insufficient section is supplemented withthe middle-pressure oxygen, the problems that the low-pressure oxygen is diffused, and energy waste is generated when the middle-pressure oxygen is used a lot are effectively avoided, and oxygen-enriched energy conservation and consumption reduction of a blast furnace are achieved to the maximum limit.

The invention discloses a double-circuit natural cooling type air conditioning system and a control method of the double-circuit natural cooling type air conditioning system. The air conditioning system comprises a refrigeration/ natural cooling circuit and a natural cooling circuit. The refrigeration/ natural cooling circuit comprises a compressor, a first evaporative condenser, a first refrigerant pump, and a first evaporator. An inlet of the first evaporative condenser communicates with an outlet of a compressor. An inlet of the compressor communicates with an outlet of the first evaporator. An outlet of the first evaporative condenser communicates with an inlet of the first evaporator through a first refrigerant pump. The natural cooling circuit comprises a second evaporative condenser, a second refrigerant pump and a second evaporator. An inlet of the second evaporative condenser communicates with an outlet of the second evaporator. Evaporator proportions and the size of the compressor can be configured according to specific application environment, so that the system cost is reduced, and meanwhile, natural cold sources are fully utilized to improve energy efficiency.

The invention discloses a method for reducing energy consumption of an ethylene device; the method is characterized in that cracked gas coming out of a cracking furnace outlet is cooled by a quench cooler, then is sent into an oil washing tower and is subjected to substance separation, quench oil is led out from the tower bottom of the oil washing tower, and a part of the quench oil is sent to the quench cooler; a part of the quench oil returns to the oil washing tower; a part of the quench oil enters an extraction tower and is extracted by a solvent, a material at the tower top of the extraction tower returns to the oil washing tower, and an asphalt phase of a material at the tower bottom of the extraction tower is led out.

The invention relates to a small-scale low-energy-consumption stepped hydrogen storage system. A hydrogen source, an alloy hydrogen storage system and a high-pressure hydrogen storage system are included. The hydrogen source is arranged at the input end of a hydrogen pipeline. The hydrogen pipeline is connected with the high-pressure hydrogen storage system. The high-pressure hydrogen storage system comprises a classified hydrogen compressor and a classified high-pressure hydrogen storage tank. The hydrogen pipeline is provided with a branch, the branch is provided with the alloy hydrogen storage system, and the output end of the alloy hydrogen storage system is connected to the hydrogen compressor of the high-pressure hydrogen storage system. The small-scale low-energy-consumption steppedhydrogen storage system has the beneficial effects that through the small-scale low-energy-consumption stepped hydrogen storage system, for the hydrogen source large in flow fluctuation, the method that the hydrogen storage energy consumption is reduced through the stepped hydrogen storage system is utilized, through alloy hydrogen storage, high-pressure hydrogen storage and other hydrogen storage technologies, the stepped hydrogen storage strategy is implemented, hydrogen compression energy consumption is reduced, system design redundancy is reduced, and small-scale efficient and stable hydrogen storage is achieved. The method and the strategy are safe, reliable, efficient, stable, economical and practical.