88results about How to "Efficient and clean utilization" patented technology

The invention discloses a multi-layer belt type drying system. The multi-layer belt type drying system comprises a drying box with an exhaust port in the top and multiple layers of transmission net belts in the drying box, wherein the input end of the lower-layer transmission net belt is connected with the output end of the adjacent upper-layer transmission net belt, and a plurality of circulation fans are arranged under each layer of transmission net belt. A horizontal separation plate dividing the drying box into a drying chamber and a cooling chamber is arranged in the drying box, an air feeding port is formed in the bottom of the cooling chamber, a draught fan used for exhausting the air is arranged inside the cooling chamber, the air feeding port and the draught fan are arranged at two sides of the transmission net belts, a heater is arranged in the drying chamber, an air inlet of the heater is communicated with an air outlet of the draught fan, and a plurality of air outlets corresponding to the transmission net belts in the drying chamber one to one are formed in the heater. The multi-layer belt type drying system is simple in structure and reasonable in arrangement, preheats a heating medium by recycling waste heat of off gas and utilizing dried upgrading materials with high temperature, and lowers the energy consumption in the drying process.

The invention relates to a process for producing natural gas by coal coking and pyrolysis coal gas thereof, in the process, raw coal gas generated by a coke oven taking H2 as fuel is purified and then completely sent to a mixer for being directly mixed with part of clean gasified coal gas for regulating hydrogen-carbon ratio, and then methanation reaction is performed under the action of a catalyst so as to prepare a product, namely the natural gas; and transformation and decarburization are performed on the other part of the clean gasified coal gas, then carbon dioxide is enriched and caught, and produced hydrogen is sent to the coke oven for burning and supplying heat. In the process, coal gasification and coke dry quenching are simultaneously performed, and a set of air separation device is realized for providing a heat carrier, namely N2, and a gasifying agent, namely O2, for the coke dry quenching and the coal gasification respectively, thereby enabling the air separation processeffect to be higher. Coke making by hydrogen burning, air separation, the coke dry quenching, the coal gasification and methanation of the coal gas of the coke oven are organically integrated, and the clean production in the coking industry and the economic and high-efficient utilization of the pyrolysis coal gas are realized, thereby having great application value in the aspects of energy utilization, CO2 emission reduction and environmental protection.

The invention discloses a combination method using semi-coke tail gas for power generation to cogenerate liquefied natural gas. The semi-coke tail gas is pressurized by an air blower and enters a pretreatment process, and impurities of tar, naphthalene, hydrogen sulfide and the like in the semi-coke tail gas are removed; a small part of preliminary purified gas after compression enters a gas generator unit directly, and the generated power is used for liquefying natural gas in a subsequent work section; and a large part of the preliminary purified gas enters a liquefied natural gas work section and is subjected to tar and naphthalene refined removing, sulfur resistance conversion, deep purification, methanation, liquefied cryogenic separation and the like to manufacture the liquefied natural gas. According to the combination method using semi-coke tail gas for power generation to cogenerate liquefied natural gas, all chemical engineering units operate according to set rated operating conditions and need not purchase electricity externally, problems of self power generation limits and ultra-low on-grid electricity price are solved for enterprises, and the economy of semi-coke enterprises is enhanced. Simultaneously, industrial exhausted semi-coke tail gas is prepared into the clean energy of the liquefied natural gas which is shortage in China, and accordingly, efficient and clean usage of the semi-coke tail gas is achieved.

The invention belongs to the technical field of N2O emission reduction in a coal-fired fluidized bed, and particularly relates to a biomass gasified gas re-burning mode and a biomass gasified gas re-burning system for a coal-fired fluidized bed. The wall of a fluidized bed boiler is provided with a plurality of biomass gasified gas nozzles, biomass gasified gas is introduced into a hearth of the fluidized bed boiler, and the biomass gasified gas is reacted with N2O-containing smoke generated by burning of coal dust in the hearth to realize multi-stage re-burning so as to improve the burning efficiency of the whole fluidized bed and reduce the emission of N2O. Compared with pyrolysis and direct burning, the biomass gas rich in combustible substances such as H2, CH4, CO and the like has low ash content and extremely low sulfur content, has no sulfur removal problem, is ideal re-burning fuel and can effectively reduce the emission of nitrogen oxides by using mixed burning of the biomass gasified gas and the coal dust; and because of low alkali metal and chlorine content in the gasified gas, problems of slag formation and corrosion can be avoided, utilization of the coal dust is not affected and efficient clean utilization of the biomass can be realized.

The invention discloses a series connection and parallel connection switching type heat supplying method of a compressing absorbing hybrid heat pump of a gas engine. The method involves a parallel connection mode and a series connection mode; when the environmental temperature is high, a hybrid heat pump heat supplying system enters the parallel connection mode, and user returned water is divided into two parts; one part of the returned water is sequentially heated through a first condenser, a cylinder sleeve heat exchanger and a smoke heat exchanger through connecting pipes; another part of the user returned water sequentially flows through a first valve, a second water pump, an absorber, a second condenser and a fourth valve by the connecting pipes and then is mixed with previous hot water; when the environmental temperature is low, the hybrid heat pump heat supplying system enters the series connection mode, and the user returned water is sequentially heated through the first condenser, the cylinder sleeve heat exchanger and the smoke heat exchanger so as to produce water supplied to a user. With the adoption of the method, the heating capacity of the whole system can be greatly improved, and meanwhile, the smoke exhaust temperature can be reduced.

The invention discloses a process for further co-producing LNG (Liquefied Natural Gas) by using pyrolysis gas generated after low-rank coal is used for generating power in a power generation system. According to the process, semi-cokes generated by coal in a pyrolyzing furnace and separated hot ash are fed into a power generating boiler system so as to be combusted and utilized, the generated power is used for LNG in the subsequent process, raw gas and fine ash particles generated through pyrolysis enter into a separation system, and products with high additional values can be extracted from the separated tar. The process specifically comprises the following steps of pressurizing the raw gas and then entering into a pretreatment process; removing impurities such as dust, oil tar, naphthalene and H2S in the raw gas; compressing pre-purified gas and then entering into units such as a pyrolysis gas deep purification unit, a methanation unit and cryopenic separation and liquidation units, thereby preparing clean energy liquefied natural gas which is short in China. According to the invention, coal pyrolysis and gasification are organically combined with gas, chemical, electric and heat production processes on the basis that heat supply and power generation are carried out by taking semi-cokes as solid fuels, so that graded transformation and step-by-step extraction of coal as well as economic benefit maximization are realized, the energy utilization efficiency is increased, and the economical efficiencies of thermoelectricity enterprises are increased.

The present invention discloses a chemical looping combustion power generation process and system using landfill gas, which falls into the range of efficient landfill gas cleaning and utilization technique. This power generation system is composed of a landfill gas collection system, a chemical looping combustion system, and a gas and steam combined cycle power generation system. In the process, the simple substance metal in the air reactor takes oxidation reaction with air, the landfill gas and the obtained metal oxide take reduction reaction in the fuel reactor to generate single substance metal, CO2 and water vapor, and the reduced simple substance metal returns to the air reactor via the refeed line and completes the regeneration of metal oxide; the gas at the outlet of the fuel reactor and the gas at the outlet of the air reactor are led to two separate gas and steam combined cycle power generation systems for power generation and CO2 recovery.

The invention provides a method for preparing a novel coal water slurry product from multiple materials. The method includes the following steps: (1) after raw coal is crushed, a material A is obtained; (2) after being modified together, sludge, optional coal slime, water and additive then undergo strong shear treatment, so that a material B is obtained; (3) the material B is ultrafinely ground, so that a material C is obtained; (4) the material A, part of the material C, water and additive are shaped and roughly ground, so that a material D is obtained; (5) after being mixed, the material D and the remaining material C undergo strong shear, and thereby the coal water slurry product is obtained. The grain size distribution of the multi-material coal water slurry prepared by the preparation method is reasonable, and the novel coal water slurry product has good stability, flowability and good atomizing effect, and is also applicable to the preparation of fuel and gasified coal water slurry; in addition, the preparation method is easy to implement, energy consumption is low, and the problem on how to utilize sludge and coal slime on a large scale can be reasonably solved.

The invention discloses a power generation method and an electric power generation method. By means of the power generation method and the electric power generation method, the energy conversion efficiency is remarkably improved, pollutant discharge is reduced, due to the fact that high-temperature exhaust of a fuel battery and a combustion gas turbine circulation loop still has a quite high temperature grade and belongs to medium and low temperature waste heat, the organic Rankine cycle is adopted for recycling the medium and low temperature waste heat, the energy conversion efficiency can be greatly improved, and emission of pollutants to the environment is reduced. Besides, the power generation method and the electric power generation method achieve comprehensive gradient conversion and efficient and clean utilization of energy through system integration and procedure improvement.

The invention relates to a method for deeply extracting vanadium by utilizing an alkalinetailings. The method comprises the steps of mixing the alkaline tailings and a vanadium-containing material, and then roasting an obtained mixture; and leaching the roasted clinker through water so as to obtain a vanadium-containing solution and a leaching residue. According to the method for deeply extractingthe vanadium by utilizing the alkaline tailings provided by the invention, the alkaline extracted vanadium tailings is directly used as a raw material and is mixed with the vanadium-containing material so as to carry out reaction, so that compared with a traditional tailings treatment technology, the method provided by the invention has remarkable advantages. The method for deeply extracting thevanadium by utilizing the alkaline tailings is simple in process and short in flow, sodium slat in the alkaline extracted vanadium tailings is recycled, meanwhile, a vanadium element in the extractedvanadium tailings is high-efficiently recovered, vanadium is high-efficiently cleaned and utilized, the cost is reduced favorably, and the method has favorable economic benefit and application prospect.

The invention provides a solid oxide fuel cell combined system based on solar energy methanol reforming hydrogen production. The methanol reforming hydrogen production subsystem comprises at least a first heat exchanger and a methanol reforming reactor. A solid oxide fuel cell subsystem includes at least a plurality of solid oxide fuel cells, a fuel compressor, a second heat exchanger, an afterburning chamber, and a prereformer; A wet air turbine circulation subsystem includes at least a first gas turbine and a wet air generating device capable of producing wet air from air and water; The wetair outlet of the wet air generating device is communicated with the cathode inlet via the second heat exchanger, the outlet of the methanol reforming reactor is communicated with the anode inlet viathe first heat exchanger, the fuel compressor and the preformer in turn, the outlet of the afterburning chamber is communicated with the inlet of the first gas turbine, and the outlet of the first gasturbine is communicated with the inlet of the second heat exchanger. The combined system is an efficient power generation system which can output more power and has better energy saving and economy.

The invention relates to a device and method for joint production of iron, sulfur and gas in the smelting process of pyrite, and belongs to the field of metal smelting. The method comprises the following steps of calcining the pyrite at the bottom part of the interior of a calcining-gasifying reaction tower, enabling pulverized coal and fly ash to generate gasifying reaction at the middle upper part, enabling the sulfur-containing flue gas to carry the high-valence oxide of iron produced by calcining at the tower bottom to the middle upper part of the reaction tower, mixing with the gas and coke produced by gasifying, and generating oxidation and reduction reaction; separating the product by an iron-based high-temperature separator and a carbon-based high-temperature separator, and sendingback into an iron oxide reduction tower; performing secondary reduction reaction on the iron oxide in the iron oxide reduction tower, and producing reduction gas, so as to obtain iron slag; purifyingthe crude gas, so as to obtain the purified gas; enabling a sulfur condenser to condense and recycle the sulfur. The method has the advantages that the joint production of iron, sulfur and gas is realized in the smelting process of the pyrite, and the pyrite can be efficiently and cleanly utilized.

The invention provides an electric power storage system and method employing coal gasification of a solid heat carrier. The system comprises a power supply device, a fluidized bed powdered coal gasifier, a cyclone dust collector, an ash discharge classifier and a fine ash collecting chamber, wherein the power supply device is connected with the fluidized bed powdered coal gasifier; the fluidized bed powdered coal gasifier comprises a gasifier body; a metal heat carrier is contained inside the gasifier body and an electric heating element is arranged outside the gasifier body; a gas outlet of the gasifier body is connected with the cyclone dust collector; a feed opening of the cyclone dust collector is connected to a feeding inlet of the ash discharge classifier; a coarse ash outlet of the ash discharge classifier is connected with a material return opening; and a fine ash outlet of the ash discharge classifier is connected with the fine ash collecting chamber. The method comprises the steps of firstly heating the fluidized bed powdered coal gasifier until the temperature reaches 800-1300 DEG C by adopting the system; carrying out coal gasification reaction by using a preheating gasification agent mixed with pulverized coal and calcium carbonate mixed powder in the coal gasifier; and finally preparing a city gas or a chemical product from the high-temperature coal gas.

The invention relates to a short-process smelting reduction type iron-making system and a method, and belongs to the technical field of iron-making. The system comprises a coal powder preparation device, an iron ore powder preparation device, an iron ore powder direct reduction and powder coke preparation device and a gas-solid separation device; the iron ore powder direct reduction and powder coke preparation device is of a U-shaped structure with a communicating bottom, the two sides of the iron ore powder direct reduction and powder coke preparation device serve a low-temperature reductionsection and a high-temperature reduction section correspondingly, the bottom of the iron ore powder direct reduction and powder coke preparation device serves a smelting reduction section, molten ironis obtained at the bottom of the smelting reduction section, the coal powder preparation device and the iron ore powder preparation device are connected with the middle lower portion and the bottom of the low-temperature reduction section correspondingly, the low-temperature reduction section is connected with the gas-solid separation device, and the gas-solid separation device is connected witha top combustion device and the middle of the high-temperature reduction section correspondingly. Through three-stage iron ore powder reduction, the reducibility characteristics of different components of the coal powder are fully utilized, then the multi-stage reduction of the coal powder and the iron ore powder is realized, the comprehensive efficient clean utilization of the coal and the iron ore are finally realized, and the short-process iron-making process is completed on the basis that the separate full utilization of the coal powder is realized.

The invention discloses a thermal power plant peak regulating system based on water-electrolysis hydrogen production. The system comprises a coal-fired boiler, a hydrogen production unit arranged in the upstream position of the process of the coal-fired boiler and a flue gas recovery unit arranged in the downstream position of the process of the coal-fired boiler; the hydrogen production unit comprises multiple hydrogen storage tanks; the multiple hydrogen storage tanks are connected in parallel and communicate with water-electrolysis hydrogen production equipment through pipelines to receiveand store hydrogen; the hydrogen production unit communicates with a buffer tank through a pipeline; the buffer tank is located in the downstream position of the process of the hydrogen storage tanks;a valve group is mounted on the hydrogen production unit; and the communication states of the hydrogen storage tanks are switched by the aid of the valve group. According to the system, the multiplehydrogen storage tanks and the buffer tank communicating with the multiple hydrogen storage tanks through series connection are arranged, the multiple hydrogen storage tanks can realize the effect that multiple hydrogen storage tanks are opened while multiple hydrogen storage tanks are standby, and thus later overhauling is facilitated; and stabilized-pressure delivery of hydrogen output by the opened hydrogen storage tanks can be further performed by the buffer tank, so that the safety is improved.

The invention provides a multi-way method for synthesizing ammonia by utilizing low-rank coal. The multi-way method comprises the following steps: drying the low-rank coal to obtain dried low-rank coal and waste gas; removing dust from the waste gas to obtain coal powder; gasifying and reducing the dried low-rank coal to obtain an oil-gas mixture and quality-improved coal, wherein a gasification and reduction technology is a chemical reaction technology for heating the dried low-rank coal under an oxygen-free or micro-aerobic condition; purifying the oil-gas mixture to obtain mixed gas and wastewater; reforming and transforming the mixed gas to prepare synthetic gas; preparing coal water slurry through the wastewater, the coal powder and a coal water slurry additive and then preparing synthetic gas; preparing synthetic gas by utilizing the quality-improved coal; after mixing the three types of synthetic gas, carrying out unconventional conversion and transformation and decarburizationand separating and purifying H2; taking the H2 and N2 as raw materials to synthesize the ammonia. According to the multi-way method, a plurality of ways for synthesizing the ammonia are provided and the cost is low; reutilization of various wastes including the wastewater and the coal powder is realized and resources are saved.

The invention discloses a novel combined bed biomass gasification system and a method thereof. The novel combined bed biomass gasification system comprises a biomass pyrolysis fluidized bed gasification furnace, a cyclone separator, a coke hopper, a first screw feeder and a downdraft fixed bed gasification furnace; the biomass pyrolysis fluidized bed gasification furnace is provided with a biomassinlet, a crude pyrolysis gas outlet and a coke outlet; the cyclone separator is provided with a crude pyrolysis gas inlet, a pyrolysis gas outlet and an ash outlet; the coke hopper is communicated with the coke outlet; the first screw feeder is communicated with the coke hopper; the downdraft fixed bed gasification furnace is provided with a coke inlet, a pyrolysis gas inlet and a fuel gas outlet, and the coke inlet is communicated with the first screw feeder. The novel combined bed biomass gasification system and the method thereof effectively reduce the tar content in crude fuel gas, effectively improve the gasification efficiency and realize the efficient and clean utilization of biomass.

The invention provides a seaweed pyrolysis oil making system and a method thereof. The seaweed pyrolysis oil making system comprises a pyrolysis device, an oil-gas separator, an oil storage device, agas purification device, a gasification device, a cyclone separation device and a hydrothermal device, wherein the upper end of the pyrolysis device is connected with the oil-gas separator; the upperend of the oil-gas separator is connected with the gasification device through the gas purification device, and the lower end of the oil-gas separator is connected with the oil storage device; the lower end of the pyrolysis device is connected with the gasification device; the gasification device is connected with the hydrothermal device through the cyclone separation device; noncondensable gas generated by the pyrolysis of the pyrolysis device can be used as gasification agent used for gasification reaction, semicoke generated by pyrolysis is taken as a gasification raw material, reductive gas generated by gasification participates in hydrothermal reaction to improve the oil production efficiency of a hydrothermal liquidation process. According to the seaweed pyrolysis oil making system,byproducts in a seaweed pyrolysis process can be effectively utilized, in addition, the oil product and the yield of hydrothermal liquefaction bio-oil can be improved, and meanwhile, system energy useefficiency is high.

The invention provides a system and a process for producing oxygen-containing organic matters by carbon dioxide and coal. The system comprises a coal gasification unit (1), a biological fermentation unit (2), a fermentation liquid separation unit (3) and a carbon dioxide unit (7), wherein a gas phase outlet of the carbon dioxide unit (7) is connected with a gas phase inlet of the coal gasification unit (1); a gas phase outlet of the coal gasification unit (1) is connected with a gas phase inlet of a fermentation raw material gas purification unit (4); a gas phase outlet of the fermentation raw material gas purification unit (4) is connected with a gas phase inlet of the biological fermentation unit (2); a liquid phase outlet of the biological fermentation unit (2) is connected with a liquid phase inlet of the fermentation separation unit (3); a coal gasification process is carried out in the coal gasification unit (1); a gasification agent in the coal gasification process contains carbon dioxide; and the carbon dioxide contained in the gasification agent is provided by the carbon dioxide unit (7).

The invention relates to a system and a method for pyrolysis of household refuses. The system comprises a combined type high-temperature pyrolysis rotating bed, an oil-gas separating device, a fluidized bed and a combustible gas storage tank, wherein the combined type high-temperature pyrolysis rotating bed comprises a material feeding opening, a material discharging opening and a high-temperature oil-gas outlet, a preheating area, a reaction area I and a reaction area II are arranged in a furnace body in sequence according to the rotating direction of the rotating bed, and a plasma torch is arranged on a furnace wall of the reaction area II. The system disclosed by the invention has the advantages of low operation cost, high resource utilization and energy regeneration level, good economic benefits of products, less secondary pollution, no production of dioxin and easiness for realizing industrialization and scale management of refuse pyrolysis.

The invention discloses a method for preparing clean fuel from coal tar and a method for preparing the clean fuel from coal. The method for preparing the clean fuel from the coal tar comprises following steps: the coal tar is subjected to distillation separation, and a carbolic oil fraction, an intermediate fraction and a heavy fraction are obtained; the carbolic oil fraction and methyl alcohol are subjected to etherification, and a high-octane component is obtained; the heavy fraction is subjected to extraction separation, and deasphalted oil is obtained; the intermediate fraction and the deasphalted oil are subjected to hydrorefining and hydrocracking, a mixture is subjected to fractional distillation, and a gasoline fraction and a diesel fraction are obtained; the high-octane component is added to the gasoline fraction, and blended gasoline is obtained. According to the method for preparing the clean fuel from the coal, the raw material coal is pyrolyzed, and the coal tar, semicoke and pyrolysis gas are obtained. With the adoption of the technical scheme, sufficient deep processing of the coal tar resource and the coal resource are realized, the high-octane component is obtained, and the gasoline fraction meeting the national standard is obtained.