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A Vertical Tube Falling Film Evaporator

A falling film evaporator and standpipe technology, applied in standpipe evaporators, evaporator accessories, evaporation, etc., can solve the problems of low heat exchange efficiency of falling film evaporators, reduce temperature, reduce thermal deterioration, and reduce overheating Effect

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a vertical tube falling film evaporator, which uses non-condensable gas to disturb the liquid film in the evaporation tube, thereby improving the heat exchange efficiency and reducing the fouling phenomenon in the evaporation tube, which solves the problem of existing The problem of low heat exchange efficiency of falling film evaporator in technical problems

Method used

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  • A Vertical Tube Falling Film Evaporator
  • A Vertical Tube Falling Film Evaporator
  • A Vertical Tube Falling Film Evaporator

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a vertical tube falling film evaporator provided in this embodiment includes a housing 9, and the interior of the housing 9 is divided into a feed chamber, a carrier gas chamber, a heating chamber, and a gas-liquid separation chamber from top to bottom; A liquid distributor 12 is provided in the cavity, and a liquid distributor 1 is provided at the bottom of the feeding chamber; several evaporation tubes 4 are vertically provided in the housing 9, one end of the evaporation tube 4 is connected to the liquid distributor 1, and the other end passes through the carrier gas chamber After connecting with the heating chamber, the gas-liquid separation chamber is connected; the carrier gas chamber is filled with non-condensable gas 18, and the non-condensable gas 18 enters the interior through the side wall of the evaporation tube 4.

[0034] In this embodiment, an upper tube sheet 2, a middle tube sheet 3 and a lower tube sheet 8 are arranged horizo...

Embodiment 2

[0042] A vertical tube falling film evaporator provided in this embodiment has the same principle as that of Embodiment 1, and its structure is similar to that of Embodiment 1. The only difference is that: image 3 As shown, the material of the sleeve 17 includes metal pipe, plexiglass or resin, and other processable inelastic materials that can withstand a temperature of 150° other than the materials listed in this embodiment. In this embodiment, the sleeve 17 The material is preferably a metal pipe. A through hole is provided on the side wall of the metal tube, and the through hole is set in one-to-one correspondence with the air inlet to ensure that the non-condensable gas 18 can pass through the casing 17 and enter the evaporation tube 4 .

[0043] Further, the diameter of the aforementioned through hole is 0.1 mm-5 mm, the thickness of the side wall of the evaporation tube 4 is 1 mm-35 mm, and the thickness of the side wall of the sleeve 17 is 1 mm-50 mm. Preferably, the...

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Abstract

The invention relates to the technical field of evaporating devices and in particular relates to a vertical tube falling-film evaporator. The vertical tube falling-film evaporator comprises a shell, wherein a feeding cavity, a carrier gas cavity, a heating cavity and a gas-liquid separation cavity are sequentially formed inside the shell from top to bottom; a liquid dispenser is arranged inside the feeding cavity; a liquid distributor is arranged at the bottom of the feeding cavity; a plurality of evaporation tubes are vertically arranged in the shell; one end of each evaporation tube is connected with the liquid distributor, and the other ends of the evaporation tubes penetrate through the carrier gas cavity and the heating cavity and are communicated with the gas-liquid separation cavity; the carrier gas cavity is filled with non-condensable gas; and the non-condensable gas passes through side walls of the evaporation tubes so as to enter the evaporation tubes. According to the vertical tube falling-film evaporator provided by the invention, liquid films in the evaporation tubes are disturbed by utilizing the non-condensable gas, so that the heat exchange efficiency is improved,and scaling phenomena in the evaporation tubes are reduced. Moreover, the problem in the prior art that the falling-film evaporator is relatively low in heat exchange efficiency is solved.

Description

technical field [0001] The invention relates to the technical field of evaporation equipment, in particular to a vertical tube falling film evaporator, and more particularly to a vertical tube falling film evaporator which uses non-condensable gas to disturb the liquid film in the evaporation tube to improve heat exchange efficiency. Background technique [0002] As a high-efficiency evaporation equipment, vertical tube falling film evaporator has been widely used in petrochemical industry, metallurgy, light industry, food processing, medicine, seawater desalination, sewage treatment and other fields due to its unique advantages. The principle of the falling film evaporator is film evaporation, and its heat transfer coefficient depends on factors such as the gas-liquid flow rate, scaling and liquid film thickness in the heat exchange tube, among which the scaling factor is particularly important. [0003] Scaling in the evaporation tube is generally caused by overheating whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/06B01D1/22B01D1/30
CPCB01D1/065B01D1/30
Inventor 王晶晶廖昌建赵利民方向晨
Owner CHINA PETROLEUM & CHEM CORP
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