32results about How to "Low desorption temperature" patented technology

The invention relates to a renewable flue gas desulfurization agent and the preparation method thereof. The flue gas desulfurization agent is the aqueous solution of 1,4-bis(2-hydroxypropyl) piperazinyl sulfate containing 30% of 1,4-bis(2-hydroxypropyl) piperazinyl by mass. The flue gas desulfurization can be prepared from the of 1,4-bis(2-hydroxypropyl) piperazinyl and other raw materials, by mixing according to a certain proportioning at normal temperature. Because the pKa1 of the conjugate acid of the 1,4-bis(2-hydroxypropyl) piperazinyl is 3.8, and the pKa2 of that is 8.2, the obtained flue gas desulfurization agent achieves the advantages of large absorbing capacity, high de-absorbing ratio, low de-absorbing temperature and suitable temperature difference in the absorbing and de-absorbing process; can reduce the energy consumption in absorbing and de-absorbing process obviously, and is very suitable for the application in process of removing SO2 in discharged flue gas in coal fired power plant and so on.

The present invention relates to an adsorbent using the porous organic-inorganic hybrid material(s) containing iron having a large surface area and a high pore volume, in particular, a water adsorbent. Also, it relates to an adsorbent that can be used in humidifiers, dehumidifiers, coolers/heaters, a refrigerating machine or an air conditioner, etc., which can easily absorb or desorb at 100° C. and below, and has a great adsorption amount per weight of the adsorbent.

Also, the present invention relates to a novel preparation method of porous organic-inorganic hybrid material(s), in particular, a preparation method characterized by not using hydrofluoric acid, porous organic-inorganic hybrid material(s) prepared by said preparation method, and a use as an adsorbent thereof.

The invention relates to a heat-recovery-typed secondary thermal chemisorption refrigeration circulatory system based on pressure-switching desorption, and pertains to the technical field of refrigeration and air-conditioning, wherein, a main reactor outlet is connected with an intermediate control valve inlet, an intermediate control valve outlet is connected with an auxiliary reactor inlet, an auxiliary reactor outlet is connected with an auxiliary control valve inlet, an auxiliary control valve outlet is connected with a condenser inlet, a condenser outlet is connected with a throttle valve inlet, a throttle outlet is connected with an evaporator inlet, an evaporator outlet is connected with a main control valve inlet, and a main control valve outlet is connected with a main reactor inlet. The interior of a main reactor is filled with a high-temperature reaction chemosorbent, the interior of an auxiliary reactor is filled with a medium-temperature chemosorbent, and univariate absorption characteristics of chemosorbents with different reaction temperature ranges are utilized for realizing cooling pressure-switching desorption process of high-temperature reaction absorbents. The heat-recovery-typed secondary thermal chemisorption refrigeration circulatory system of the invention can significantly decrease desorption temperature of the chemosorbent in the thermal chemisorption refrigeration circulatory system and expand the utilization scope of waste heat.

The invention relates to a treating agent for acid components in mixed gases. The treating agent comprises a composition containing hydramine and amide or a water solution. The treating agent is used for removing and purifying the acid components in the mixed gases, can be applied to the gas treatment processes in the fields such as natural gas extraction, chemical fertilizer gas synthesis, petrochemical production and room-temperature gas recovery.

The invention discloses an alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide. The alcohol amine type ion liquor-containing compound absorbent is characterized by comprising an absorption component, a corrosion inhibitor, an antioxidant and solvent, wherein the absorption component consists of N-Methyldiethanolamine and ionic liquid (TETAH)<+>(BF4)<->. The invention provides a compound absorbent which is high-efficiency, good in stability, easy to desorb, and low in regeneration energy consumption and can capture carbon dioxide. Organic amine and ionic liquid are mixed, the organic alcamines has the characteristics of being high in absorption rate and large in absorption capacity and the ionic liquid has the properties of low steam pressure and good stability and the like, thus supplementing each other so as to improve the processing capacity of carbon dioxide.

The invention relates to a double-stage adsorption refrigerating recycling system which is characterized by consisting of a primary adsorption bed, a secondary adsorption bed, a condenser, an evaporator, a heat exchange tube, a valve and an auxiliary pipeline. Heteroatom SAPO-34 molecular sieves are filled in the primary adsorption bed; and hydrophobic silica gel, activated carbon, pure silicon molecular sieves and at least one of MCM (mesoporous crystalline material) series mesoporous silica materials are filled in the secondary adsorption bed. A desorption process of the primary adsorption bed can be greatly improved by an adsorption effect of the secondary adsorption bed of the double-stage adsorption refrigerating recycling system, and the temperature of a driving heat source of the primary adsorption bed is reduced. The double-stage adsorption refrigerating recycling system has the advantages of low desorption temperature and high adsorbent recycling adsorption quantity, reduction of the size of the system is facilitated, and the efficiency of the adsorption refrigerating system is improved.

The invention provides an adsorption-condensation type air water taking device which is used for continuously taking water. The device comprises a shell, an air filter screen, a separation type adsorption bed, an evaporator, a condenser, a compressor, a water pan, a water storage device, a water filter, a fan and a motor. The separation type adsorbent bed used in the invention combines the hydrogel and a heat exchanger, heat and mass transfer performance of the hydrogel in the adsorption and desorption processes is enhanced, heat and moisture transfer efficiency of air-materials is improved, adsorption-condensation circulation based on a separated adsorption bed is further used, a dew point of air is improved by adopting adsorption circulation, and unit water taking energy consumption in the condensation process is reduced. Besides, the dew point of the air flowing through the adsorption bed can be improved through adsorption-condensation circulation based on the separation type adsorption bed, so energy consumption is reduced, efficiency is improved, and a water taking unit based on the separation type adsorption bed is relatively small, convenient and particularly suitable for flexible water supply in desert arid areas.

The invention provides a coal slime flotation method with an MEA pregnant solution as a flotation agent. The coal slime flotation method comprises the steps that the MEA pregnant solution and coal slurry are pumped into a stripping tower correspondingly, the temperature in the stripping tower is 80-100 DEG C, the pressure is 0.1MPa, the reaction time is 30-40 min, and then a collector is used forcollecting clean coal after being subjected to flotation; and the volume flow ratio of the MEA pregnant solution to the coal slurry is (3 to 5) to 1. Compared with common CO2 desorption, the desorption temperature is reduced to below 373 K, and the desorption energy consumption is reduced by 20%; and compared with common coal flotation, the recovery rate of coal is increased by 25%, and the flotation energy consumption is reduced by an average of 40%. According to an integrated technology, the energy consumption is reduced, parameters in all aspects of a traditional technology are optimized, efficient CO2 capturing and utilization of fly ash and grizzle in industry (power plant, cement plant and the like) can be realized synchronously, and the coal slime flotation method with the MEA pregnant solution as the flotation agent has significant industrial application value.

The invention relates to a low-temperature refrigeration and cold storage system capable of efficiently utilizing solar energy. The system comprises a compressor (1), a condenser (2), a liquid storage tank (3), an intercooler (4), an evaporator (5), a cooler (6), a first adsorption bed (101), a second adsorption bed (102) and a cold storage adsorption bed (11), wherein, in the daytime refrigeration/cold storage mode, solar energy is utilized to enable the first adsorption bed and the second adsorption bed to work alternately to achieve refrigeration, meanwhile, the cold storage adsorption bed carries out desorption reaction under the suction adjustment effect of the compressor to complete cold storage step by step, and in the night cold release mode, the cold storage adsorption bed continuously adsorbs refrigerants to achieve continuous refrigeration. Compared with the prior art, the compressor is introduced to adjust the desorption pressure of the adsorption bed and reduce the desorption temperature, so that the system actively adapts to the fluctuating solar hot water temperature, and low-temperature desorption and heat absorption are realized; and meanwhile, under the assistance of desorption reaction of the adsorption bed, suction pressure of the compressor is increased, pressure ratio of the compressor is reduced, power consumption of the compressor is reduced, and refrigeration energy efficiency is remarkably improved.