Technique for desalting sea water, making salt and comprehensively using by-products thereof by utilizing wind energy, solar energy and heat pump technologies
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A heat pump technology and solar energy technology, applied in the field of seawater desalination, salt production and comprehensive utilization of by-products, can solve the problems of backward production technology, waste of resources, poor business efficiency, etc., to ensure production continuity, achieve material balance, and reduce costs Effect
Active Publication Date: 2011-09-07
ZHANJIANG NONGHAI TECHNOLOGY CO LTD
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[0002] my country has a long coastline and is a big producer of sea salt, but the production technology is backward and cannot realize the modern production of factory buildings, which is not in line with the development of modern science and technology: (1) The annual production of one ton of sea salt takes up 250m of coastal land 2 , according to the national annual output of 30 million tons, occupying 7.5 million hectares of beach land, occupying a large amount of precious land resources; (2) open-air operations, low technical content, heavy labor load, high production costs, and poor enterprise benefits; (3) sea salt crystallization The process is open-air beach drying, which is restricted by natural conditions and cannot achieve stable and high yields, and the product quality does not meet food hygiene and safety; (4) It is difficult to collect old brine when drying sea salt on the beach, and it is discharged arbitrarily, which seriously affects the ecological environment along the coast; (5) A large amount of fresh water is evaporated during the production of sea salt, and about 35 tons of salt are evaporated for each ton of salt produced. There is no recycling, resulting in a great waste of resources; (6) The current vacuum salt production consumes 280 kilograms of coal for each ton of salt produced. Annual production of 30 million tons of salt consumes 8.4 million tons of coal, wastes resources, pollutes the atmosphere, and runs counter to the energy conservation and emission reduction advocated by the state
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[0039] The process technology of the present invention can be implemented, and the selection of equipment is very important. The equipment selected for the process is all common at home and abroad, and is selected according to the specifications and models according to the process parameter requirements of production capacity and product quality standards. In addition, the main equipment driving energy is wind energy, solar energy is used as evaporation heat energy, heat pump technology is used for low-temperature evaporation, and compression evaporation is used for crystallization to produce salt.
[0040] (1) Utilization of wind energy
[0041] The southeast coast of my country is rich in wind energy, every m 2The average wind speed of m / s is 5000-7000 hours per year, and the utilization rate of wind energy is above 47%. Therefore, using wind energy to drive wind turbines to drive production equipment is the development direction of wind energy.
[0042] The technology of t...
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Abstract
The invention relates to a technique for desalting sea water, making salt and comprehensively using by-products thereof by utilizing wind energy, solar energy and heat pump technologies, the main procedures comprise desalting sea water, air-blowing bromine, removing impurities for clarification, heating solar pond and storing halogen, evaporating for concentration, compressing and crystallizing for salt making, brine chemical engineering, etc. the invention desalts sea water, makes salt and comprehensively uses by-products thereof by utilizing wind energy, solar energy and heat pump technologies, organically combines sea water desalting, salt making and comprehensive use of dregs and waste liquor, takes wind energy, solar energy and other renewable energy resources as main energy sources,changes sea salt production from drying on beach in the open air manually to mechanized and automated operation, puts an end to the backward state of sea salt enterprises, can save energy consumptionand reduce pollution, can save investment by about 50% and occupied area by 95%, not only lowers production cost, but also recovers 35m<2> of fresh water by producing one ton of salt, thus protectingfresh water resource.
Description
technical field [0001] The invention relates to a technology for seawater desalination, salt production and comprehensive utilization of by-products by using wind energy, solar energy and heat pump technology. Background technique [0002] my country has a long coastline and is a big producer of sea salt, but the production technology is backward and cannot realize the modern production of factory buildings, which is not in line with the development of modern science and technology: (1) The annual production of one ton of sea salt takes up 250m of coastal land 2 , according to the national annual output of 30 million tons, occupying 7.5 million hectares of beach land, occupying a large amount of precious land resources; (2) open-air operations, low technical content, heavy labor load, high production costs, and poor enterprise benefits; (3) sea salt crystallization The process is open-air beach drying, which is restricted by natural conditions and cannot achieve stable and h...
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