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Utilization device, system and method of steam waste heat of vacuum device of seawater desalination system

A vacuum device, steam waste heat technology, applied in seawater treatment, general water supply saving, heating water/sewage treatment and other directions, can solve the problems of low temperature and pressure, can not be directly reused, waste of resources and energy, etc., to improve temperature, save Energy, the effect of optimizing system processes

Active Publication Date: 2011-07-06
CHINA SHENHUA ENERGY CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the non-condensable gas discharged from the vacuum device in the low-temperature multi-effect distillation seawater desalination system is steam, but because of its relatively low temperature and pressure, it cannot be directly reused, so it is generally discharged, resulting in a waste of resources and energy

Method used

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  • Utilization device, system and method of steam waste heat of vacuum device of seawater desalination system
  • Utilization device, system and method of steam waste heat of vacuum device of seawater desalination system
  • Utilization device, system and method of steam waste heat of vacuum device of seawater desalination system

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Low-temperature multi-effect distillation seawater desalination system vacuum device steam waste heat utilization device, including a steam ejector 2 and a steam / liquid heat exchanger 3, the steam ejector 2 is connected to the vacuum device 1 through a steam delivery pipe, and the steam ejector 2 It is connected with the steam / liquid heat exchanger 3 through a steam delivery pipe. The steam / liquid heat exchanger 3 is connected with the feed water pump (not shown) of the seawater desalination system through the receiving material water pipe 10; the steam / liquid heat exchanger 3 is connected with the evaporator (not shown) of the seawater desalination system through the discharge material water pipe 11 Connection; the steam / liquid heat exchanger 3 is provided with an exhaust port 7 to discharge the remaining non-condensable gas.

[0042] When using this device to utilize the steam waste heat of the vacuum device, the process is as follows:

[0043] (1) Utilize the steam ...

Embodiment 2

[0047] The steam waste heat utilization device of the vacuum device of the low-temperature multi-effect distillation seawater desalination system includes two steam ejectors 2, 5, and two steam / liquid heat exchangers 3, 6. The first steam ejector 2 is connected to the vacuum device 1 through a steam delivery pipe, and the first steam ejector 2 is connected to the first vapor / liquid heat exchanger 3 through a steam delivery pipe. The first steam / liquid heat exchanger 3 is connected to the feedwater pump (not shown) of the seawater desalination system through the receiving material water pipe 10; the first steam / liquid heat exchanger 3 communicates with the second steam ejector 5 through steam Tube 4 is connected. The second steam injector 5 is connected with the second steam / liquid heat exchanger 6 through a steam delivery pipe. A material water pipe 8 and a condensation water pipe 9 are connected between the second steam / liquid heat exchanger 6 and the first steam / liquid heat...

Embodiment 3

[0060] The steam waste heat utilization device of the vacuum device of the low-temperature multi-effect distillation seawater desalination system includes three steam ejectors 2, 5, and 13, and three steam / liquid heat exchangers 3, 6, and 14. The first steam ejector 2 is connected to the vacuum device 1 through a steam delivery pipe, and the first steam ejector 2 is connected to the first vapor / liquid heat exchanger 3 through a steam delivery pipe. The first steam / liquid heat exchanger 3 is connected to the feedwater pump (not shown) of the seawater desalination system through the receiving material water pipe 10; the first steam / liquid heat exchanger 3 communicates with the second steam ejector 5 through steam Tube 4 is connected. The second steam injector 5 is connected with the second steam / liquid heat exchanger 6 through a steam delivery pipe. The material water pipe 8 and the condensation water pipe 9 are connected between the second steam / liquid heat exchanger 6 and the...

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Abstract

The invention belongs to the technical field of seawater desalination, and relates to a utilization device of the steam waste heat of a vacuum device of a low-temperature multi-effect distillation seawater desalination system, a system containing the device, and a utilization method of the steam waste heat. The steam waste heat utilization device comprises one and more steam ejectors and corresponding steam / liquid heat exchangers; by using the steam ejectors and using high-temperature and high-pressure steam as a power, the steam with a low temperature and a low pressure discharged by the vacuum device of the low-temperature multi-effect distillation seawater desalination system is ejected so as to increase the pressure and the temperature of the ejected steam; the steam generated by the steam ejectors enters into the corresponding steam / liquid heat exchangers, and exchanges heat with material water so as to increase the temperature of the charging water in an evaporator and allow the steam to condense into fresh water. The device can effectively utilize low-grade steam, save energy, increase water generation ratio, and has important significance in the improvement of the economy of low-temperature multi-effect distillation seawater desalination systems.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and relates to a device, system and method for utilizing steam waste heat in a vacuum device of a low-temperature multi-effect distillation seawater desalination system. Background technique [0002] Seawater desalination, also known as seawater desalination, is the technology and process of separating salt and water in seawater. [0003] The development and industrial application of seawater desalination technology has a history of half a century. During this period, industrial technologies mainly represented by multi-stage flash evaporation, reverse osmosis and multi-effect evaporation have been formed. From a regional point of view, the Gulf countries in the Middle East will still choose multi-stage flash steam as the first choice, because it is large-scale and super-large (the water production of a single device has reached 40,000 to 50,000 tons of fresh water per day), and it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/08
CPCY02A20/124
Inventor 李延兵周洪光张建丽张忠梅刘毅吴志奇宋立新田云张金生
Owner CHINA SHENHUA ENERGY CO LTD
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