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Apparatus for heat recoverin multigrade flash desalting of sea water

A flash evaporation and heat-type technology, which is applied in the treatment of wastewater, sewage or sludge, and in the field of water, can solve the problems of small water production of the device, aggravate system corrosion and scaling, and small water production ratio, so as to avoid the water production ratio Decrease, stable water production, and increase water production ratio

Inactive Publication Date: 2007-03-07
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

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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] Referring to Fig. 1, 2, the present invention includes the heat discharge section circulation brine pipeline 12 that the inlet is connected with the condenser 11, the heat discharge section circulation brine pipeline 12 passes through the upper end of the heat discharge section flash chamber 2, and in the heat discharge section Condensers 3 are also respectively arranged on the circulating brine pipeline 12 in the section flash chamber 2, and the outlet of the circulating brine pipeline 12 in the heat discharge section is connected with the bottom end of the final stage flash chamber 2-1 in the heat discharge section, and the upper The steam outlet of the flash chamber 2 in the heat discharge section of the first stage is connected to the lower end of the flash chamber 2 of the next heat discharge sectio...

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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 water, waste water, sewage or sludge treatment, and in particular relates to a recuperating type multi-stage flash seawater desalination device for multiple recovery and utilization of heat energy. Background technique [0002] The multi-stage flash seawater desalination system is to make the hot brine flow through several flash chambers in which the pressure is gradually reduced. Since the ambient pressure is lower than the saturated vapor pressure corresponding to the temperature of the hot brine, the hot brine is rapidly partially vaporized, resulting in Steam, condensed into fresh water. It has the advantages of simple and reliable equipment, easy large-scale operation, high operating flexibility, and the ability to utilize low-level heat energy and waste heat, etc., and has broad application prospects. However, in practical applications, since the latent heat released by the flash steam is all used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/26C02F1/06C02F103/08
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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