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Multi-effect evaporative sea water desalinating device with hybrid process

A multi-effect evaporation and effect evaporation technology, which is applied in seawater treatment, general water supply saving, heating water/sewage treatment, etc., can solve the problems of evaporation/condenser scaling, increase the workload of device maintenance, and bury hidden dangers in safe operation. , to achieve the effect of simplifying the extraction design, reducing the maintenance workload and reducing energy consumption

Inactive Publication Date: 2013-05-08
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The advantage of the parallel feeding method is that the system is simple, but it is difficult to meet the requirements of the evaporator / condenser for seawater spray density and the device for the concentration ratio at the same time. Effective use of temperature difference, but its first-effect evaporator / condenser is prone to serious fouling, burying hidden dangers for the safe operation of the equipment and increasing the workload of equipment maintenance

Method used

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  • Multi-effect evaporative sea water desalinating device with hybrid process
  • Multi-effect evaporative sea water desalinating device with hybrid process
  • Multi-effect evaporative sea water desalinating device with hybrid process

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Embodiment Construction

[0015] figure 1 , 2 A structural diagram of adjacent two-effect evaporators within the same group is shown. In the figure, the seawater inlet pipe on the upper part of the tube bundle and the seawater spraying device 1 spray the seawater evenly onto the tube bundle 2, the seawater flowing in the falling film between the tube bundles is partially evaporated by the steam inside the tubes, and the generated water vapor flows along the gap between the tube bundles To the demister 3, then through the steam channel 6, it flows into the tail head 7 of the effect evaporator / condenser, and the tail head 7 of the 1st effect evaporator / condenser is connected with the steam inlet pipe box 8 of the 2nd effect evaporator / condenser , the secondary steam generated by the 1-effect evaporator / condenser enters the steam inlet tube of the 2-effect evaporator / condenser. The steam in the pipe condenses and releases heat when spraying seawater outside the heating pipe, and becomes the product wate...

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Abstract

The invention discloses a multi-effect evaporative sea water desalinating device with a hybrid process, and belongs to the technical field of sea water desalinating and heat exchange equipment. Compared with the multi-effect evaporative sea water desalinating device with a parallel feeding process, the multi-effect evaporative sea water desalinating device with the hybrid process can ensure the concentration factor of the device and the optimal spraying density of each evaporator / condenser; the water inlet temperature of a single-effect evaporator / condenser can be increased; and the capacity of the device is also improved. Compared with the multi-effect evaporative sea water desalinating device with a grouped reflux feeding process, the water inlet salinity of the single-effect evaporator / condenser can be reduced; the scaling risk of a heat transfer tube is greatly reduced; the maintenance load is reduced; and the energy consumption of a pump is reduced. Meanwhile, non-condensed gas in the sea water is released in a last-effect low-temperature evaporator / condenser; and the non-condensed gas does not enter each-effect evaporator / condenser. Therefore, corrosion of the non-condensed gas on the equipment and adverse effects on heat transfer are reduced; and the operation reliability of the device is increased by simplifying a pumping design of the non-condensed gas.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination and heat exchange equipment. The invention relates to a multi-effect horizontal tube falling film evaporation seawater desalination device, in particular to a multi-effect evaporation seawater desalination device including a seawater flow and a steam flow with both countercurrent and downstream flow, that is, a mixed flow multi-effect evaporation seawater desalination device. Background technique [0002] At present, the current multi-effect evaporation seawater desalination devices in the world use evaporators / condensers arranged in series, and the heating steam of each effect evaporator / condenser is sequentially backward from the first-effect evaporator / condenser to the final effect evaporator / condenser, and The feeding process of seawater is divided into parallel feeding and group countercurrent feeding. [0003] In each evaporator / condenser, the shell-side feed seawater is spray...

Claims

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Application Information

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IPC IPC(8): C02F1/08C02F103/08
CPCY02A20/124
Inventor 沈胜强周士鹤
Owner DALIAN UNIV OF TECH
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