Apparatus for heat recoverin multigrade flash desalting of sea water

A flash evaporation, thermal technology, applied in the field of water, waste water, sewage or sludge treatment, can solve the problems of small water production, aggravated system corrosion and scaling, small water production ratio, etc., to avoid the water production ratio The effect of decreasing, stable water production, and improving the water-making ratio

Inactive Publication Date: 2006-01-25
XI AN JIAOTONG UNIV
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Problems solved by technology

However, in practical applications, since the latent heat released by the flash steam is all used to heat the circulating brine in the condensation pipe of the current stage, the existing multi-stage flash seawater desalination system has a relatively small water production ratio and a low concentration of flash brine at each stage. too high problem
The water production ratio of the device is too small, which will weaken the thermal economy of the system; the concentration of flash brine at each level is too high, which will aggravate the corrosion and scaling of the system and affect the safety of system operation

Method used

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  • Apparatus for heat recoverin multigrade flash desalting of sea water
  • Apparatus for heat recoverin multigrade flash desalting of sea water

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Embodiment Construction

[0009] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0010] See figure 1 , 2. The present invention includes a hot discharge section circulating brine pipe 12 with an inlet connected to a condenser 11, the hot discharge section circulating brine pipe 12 passes through the upper end of the hot discharge section flash chamber 2 and flashes in the hot discharge section The circulating brine pipe 12 in the chamber 2 is also provided with a condenser 3 respectively. The outlet of the circulating brine pipe 12 in the heat discharge section is connected to the bottom end of the flash chamber 2-1 at the last stage of the heat discharge section, and the upper stage heat discharge The steam outlet of the flashing chamber 2 is connected to the lower end of the flashing chamber 2 of the next-stage hot discharge section through pipelines. The flashing brine at the bottom of the...

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Abstract

A heat return type multi-stage flash evaporation apparatus for desalinating seawater is composed of the circulating saline pipeline in heat releasing segment, mutually communicated several flash evaporation chambers in heat-recovering segment and heat-releasing segment respectively, and the circulating saline pipeline with condensing tube and saline heater in the heat-recovering segment. Their connection scheme is also disclosed.

Description

Technical field [0001] The invention belongs to the technical field of treatment of water, wastewater, sewage or sludge, and specifically relates to a regenerative multi-stage flash seawater desalination device with multiple recovery and utilization of heat energy. Background technique [0002] The multi-stage flash seawater desalination system makes the hot brine flow through several flash chambers with gradually decreasing pressure. At this time, the ambient pressure is lower than the saturated vapor pressure corresponding to the temperature of the hot brine, and the hot brine is rapidly partially vaporized. Steam becomes fresh water after condensation. It has the advantages of simple and reliable equipment, easy to large-scale, large operating flexibility, and the use of low-level heat and waste heat, and has a wide range of application prospects. However, in practical applications, all the latent heat released by the flash steam is used to heat the circulating brine in the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/06C02F103/08
CPCY02A20/124Y02P70/10
Inventor 严俊杰王金华邵树峰刘继平
Owner XI AN JIAOTONG UNIV
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