Spraying heat exchange system of low-temperature multi-effect seawater desalting device

Abstract

The invention designs a spraying heat exchange system of a low-temperature multi-effect seawater desalting device. The spraying heat exchange system is characterized by comprising a plurality of heatexchange tube bundle modules and a plurality of spraying tube bundle modules, wherein hangers and slide slots are arranged on the outer walls of the heat exchange tube bundle modules; the multiple heat exchange tube bundle modules are connected up and down through the hangers and the slide slots which are matched with one another; the front ends of the heat exchange tube bundle modules are provided with front end walls, and the rear ends of the heat exchange tube bundle modules are provided with rear end walls; and the heat exchange tube bundle modules are connected front and rear through thefront end walls and the rear end walls which are mutually matched. The spraying heat exchange system adopts a modularized design, is convenient in mounting, is simple in operation, saves labor and power, can be independently dismounted and maintained, is convenient in maintenance, shortens a maintenance period, and increases an equipment utilization rate.

Description

technical field [0001] The invention relates to a heat exchange system applied in seawater desalination, in particular to a spray heat exchange system for a low-temperature multi-effect seawater desalination device. Background technique [0002] The low-temperature multi-effect seawater desalination device is a thermal seawater desalination process with many commercial cases at present. It is characterized in that a series of evaporators (referred to as effects) containing spray tube bundles are connected in series, and a certain amount of steam is input into the inside of the heat exchange tube. , a certain amount of pretreated seawater is sprayed on the upper part of the tube. After heat exchange, the seawater becomes secondary steam and enters the next effect. The steam in the tube is collected after being condensed by seawater heat exchange. After repeated evaporation and condensation in the device, The process of obtaining desalinated water that is many times the amount...

AI Technical Summary

Problems solved by technology

[0006] (1) The existing technology involves low-temperature multi-effect seawater desalination devices. Due to the complex internal structure, each effect body is usually welded or flanged. It is difficult to check and maintain the heat exchange tubes inside the effect, and they are usually removed separately

[0007] (2) The prior art involves the low-temperature multi-effect seawater desalination device. During the long-term operation of the device, part of the heat exchange tubes are corroded. Since they cannot be dismantled separately, it is usually difficult to inspect and cannot be replaced. Affect the normal heat exchange of the system

[0008] (3) The existing technology involves low-temperature multi-effect seawater desalination equipment. Due to long-term operation, scaling and salt accumulation occur on the outer wall of the heat exchange tube. Due to the narrow gap between the tubes, it cannot be washed or completely removed by chemical cleaning under normal conditions.

[0010] (5) Due to the large number of pipes and the large overall weight of the spray heat exchange pipes of the seawater desalination device involved in the prior art, stricter requirements are placed on the support members. If the local strength is low, it is easy to cause changes in the inclination angle of the pipes, displacement and deformation , affect the normal water production, and in severe cases, it is easy to cause the failure of the desalination device

[0011] (6) The seawater desalination device involved in the prior art has a long maintenance cycle and high work intensity for the conventional effect body, and the device is out of standby for a long time, which affects its reliability

[0012] (7) For the low-temperature multi-effect seawater desalination device involved in the current technology, in order to consider the maintenance needs of the heat exchange tube without dismantling the effect body, usually enough pumping space inside the effect body is reserved, resulting in waste of materials. Increased volume of the system

[0013] (8) In the current technology, in the early stage of installation and later maintenance of the device, due to the manual operation of the pipe, it is easy to cause the deformation of the pipe during the maintenance process, and cause a certain degree of influence on the outer wall of the pipe and the oxide layer during the operation

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