Energy-saving low-temperature multiple-effect seawater desalting device

A seawater, low temperature technology, applied in seawater treatment, general water supply saving, water/sewage treatment and other directions, can solve the problems of equipment stability, high steam heat source price, expensive evaporator materials, etc., to reduce costs and save energy. Effect

Active Publication Date: 2011-01-19
HEBEI HONGRUN NUCLEAR EQUIP SCI & TECH CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The current problems of low-temperature multi-effect seawater desalination technology are: the price of steam heat source is high, the material of evaporator is expensive, and the cost of water production has been high; the temperature of raw seawater changes, which affects the stability of equipment operation

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Embodiment Construction

[0012] see figure 1 , the present invention comprises a heat source, a steam injector 18, a one-effect evaporator 1, a second-effect evaporator 2, a three-effect evaporator 3, a four-effect evaporator 4, a five-effect evaporator 5, a six-effect evaporator 6, a vacuum The injector 7, the condenser 9, and the above-mentioned six-effect evaporator are connected in series. In order to save energy and reduce operating costs, the heat source of the present invention includes a steel plant flue gas pipeline 20 and a waste heat boiler 19, and the waste heat boiler 19 is used to convert the exhaust gas of the steel plant into saturated steam and superheated steam, and the saturated steam and superheated steam are injected by steam The device 18 is sent into the one-effect evaporator 1, and the outlet of the six-effect evaporator 6 is connected to the condenser 9.

[0013] still refer to figure 1 , the present invention is also provided with raw material seawater heat exchange part, d...

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Abstract

The invention discloses an energy-saving low-temperature multiple-effect seawater desalting device, which is used for solving the problems of high operation cost and unstable operation of a desalting device. The energy-saving low-temperature multiple-effect seawater desalting device comprises a steam ejector, evaporators and a condenser, wherein multiple effect evaporators are connected in series; after improvement, the heat source of the device consists of a steel mill off-gas pipeline and a waste heat boiler; the waste heat boiler converts steel mill waste heat off-gas into saturated steam and overheat steam; the saturated steam and overheat steam are introduced into the first effect evaporator through the steam ejector; and the outlet of the last effect evaporator is connected with the condenser. The energy-saving low-temperature multiple-effect seawater desalting device has the advantages that: a, the waste heat boiler is introduced, the steel mill off-gas is fully utilized, the energy is saved, the operating cost of the device is reduced, and the pollution of the steelmaking off-gas on the environment is reduced; and b, the heat of finished water and strong brine is fully utilized, the temperature of the seawater at the inlet and outlet of the condenser is kept stable through intelligent pipeline control despite of the change of the temperature of seawater, and the equipment has the stable and optimized running state.

Description

technical field [0001] The invention relates to a seawater desalination treatment device, in particular to a low-temperature multi-effect seawater desalination device with low energy consumption and stable operation, and belongs to the technical field of water treatment equipment. Background technique [0002] Due to changes in the natural environment and increased demand, fresh water is increasingly scarce. Obtaining fresh water through seawater desalination is an effective way. At present, relatively mature seawater desalination mainly includes low-temperature multi-effect distillation, flash distillation and reverse osmosis membrane method. Reverse osmosis membrane seawater desalination equipment has the characteristics of compact structure, small footprint, large scale of equipment capacity, and easy installation. However, the pretreatment process of raw water is complicated and has strict requirements. In addition, the reverse osmosis membrane has strict requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/16C02F103/08
CPCY02A20/124
Inventor 刘春海
Owner HEBEI HONGRUN NUCLEAR EQUIP SCI & TECH CO LTD
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