Heat pump evaporating and heat pump drying energy saving technology for production of polyaluminium chloride
A technology of heat pump evaporation and heat pump drying, which is applied in the direction of evaporation, evaporator accessories, aluminum halide, etc., can solve the problems of heavy operation and maintenance workload, high energy consumption of secondary steam, and low service life of carbon steel drum and carbon steel scraper. Achieve the effects of low equipment cost, low plant cost, and reduced dehydration
Inactive Publication Date: 2013-11-13
CHANGSHA SELF CLEANING HEAT EXCHANGER TECH
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Problems solved by technology
[0004] The invention mainly aims at the fundamental problem that the existing rotary drying drum does not use secondary steam and the energy consumption is too high, and at the same time solves the important problems of the carbon steel drum and carbon steel scraper life too low and the workload of operation and maintenance is too large, the proposed polymerization The heat pump evaporative heat pump drying energy-saving technology produced by aluminum can save about 70% of the energy consumption of the existing boiler steam drum direct drying, and extend the service life of the carbon steel drum and carbon steel scraper by more than ten times than the current one. Can be automatically compensated, and the workload of operation and maintenance is close to zero
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[0012] The following is attached figure 1 Illustrate the specific embodiment of the patent of the present invention:
[0013] Heat pump evaporation heat pump drying energy-saving technology produced by polymerized aluminum, the new process is: the concentration of the raw material slurry after the reaction is controlled at a low concentration of 7%-10%, so that the comprehensive cost of energy consumption and calcium powder added as the reaction raw material is the lowest; The feed liquid is first concentrated by the evaporator 7 and then dried by the drying drum 29 . Evaporation of the same amount of dehydration is far more economical and simple than drying, and the collection of secondary steam recycling and avoiding the mixing of non-condensable gases, the evaporator 7 is also much easier than the drying drum 29, and the equipment and plant costs are even lower much. Therefore, the concentration parameter of the slurry after the evaporator 7 is concentrated is controlled ...
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The invention relates to heat pump evaporating and heat pump drying energy saving technology for production of polyaluminium chloride, wherein the concentration of material slurry after reaction is controlled to be in the low concentration of 7%-10%, heat pump drying is carried out after heat pump evaporation and concentration, and the concentration for heat pump evaporation concentration is controlled to be below 15%. Secondary steam generated by evaporation concentration and secondary steam generated by drying are respectively used as the heating steam of evaporation and drying after being raised to the temperature of 117-123 DEG C and 135-145 DEG C by boosting due to primary compression and secondary compression of the heat pump (steam compressor), thereby replacing conventional boiler steam. Drying barrels are all arranged in a closed heat insulation drying room, and the pressure in the drying room is higher than the pressure outdoors by 50-100Pa all the time in production. Compared with conventional drying adopting steam barrels, the new technology can reduce the energy consumption by about 70%.
Description
technical field [0001] The invention relates to heat pump evaporation heat pump drying energy-saving technology for polymer aluminum production, relates to energy-saving technology and equipment for steam heating and drying drums of slurry, and is suitable for drying the slurry directly on the surface of the drum heated by boiler steam, and the secondary steam generated by drying is again Energy-saving transformation and upgrading of various industries that emit all emissions. Background technique [0002] The traditional process of polyaluminum chloride production is to send the reacted slurry directly to the surface of the drum heated by boiler steam for drying, and all the secondary steam generated by drying is discharged to the atmosphere. Therefore, the energy consumption of slurry drying is high. The steam consumption per ton of product is as high as 2.1-2.3 tons of heating steam. The drying drum uses boiler high-temperature steam as the heat source for drying and he...
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Login to View More IPC IPC(8): B01D1/00B01D1/24B01D1/30C01F7/56
CPCY02P20/10Y02P20/129
Inventor 俞天翔俞秀民俞天兰彭德其
Owner CHANGSHA SELF CLEANING HEAT EXCHANGER TECH