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A three-screw self-cleaning natural circulation evaporator

A technology of automatic cleaning and natural circulation, applied in the field of automatic cleaning and convective heat transfer to strengthen energy saving, which can solve the problems of prolonged cycle, frequent periodic shutdown for cleaning, etc.

Active Publication Date: 2018-10-23
浙江建装工程技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even after adopting such a high-energy-consumption circulation pump, it only prolongs the regular cleaning cycle compared with the natural circulation evaporator, and still needs frequent periodic cleaning

Method used

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  • A three-screw self-cleaning natural circulation evaporator
  • A three-screw self-cleaning natural circulation evaporator

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Embodiment Construction

[0016] In order to illustrate the technical solution of the present invention more clearly, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the following descriptions are only some embodiments of the present invention. In other words, other embodiments can also be obtained according to these embodiments without paying creative efforts.

[0017] refer to figure 1 , figure 2 , a three-screw automatic cleaning natural circulation evaporator, the main components are an evaporation chamber 1, a three-screw mechanism 3, a heating pipe 6, a plastic spiral wheel 4, a cleaning screw 5, and a limit screen 2.

[0018] The three-screw mechanism 3 is an automatic cleaning mechanism for dirt in the heating pipe 6 of the natural circulation evaporator. The three-screw mechanism 3 is made up of a cleaning screw 5 and two plastic screw wheels 4 at both ends. The basic structu...

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Abstract

The invention discloses a three-screw automatic cleaning and natural circulating evaporator. A three-screw mechanism consists of a steel wire screw and two plastic screw wheels at two ends of the steel wire screw, the steel wire screw and the two plastic screw wheels are serially connected to one another, and the three-screw mechanism is an automatic cleaning mechanism for cleaning dirt in a heating tube. Under combined action of impact pressure of surge which is violently boiling in an evaporation chamber and an impulse force of two-phase flow of steam bubbles and a solution of an opening of the heating tube, the plastic screw wheel positioned at an upper opening of the heating tube drives a cleaning screw to carry out complicated motions such as floating and sinking, radial vibration and rotation, and therefore, automatic cleaning of the dirt of the inner wall of the heating tube and heat transfer enhancement of the inner side of the heating tube are realized. Because the linear speed of reciprocating floating and sinking and the linear speed of rotation of the cleaning screw are quite low and positive pressure of space between the cleaning screw and the inner wall of the heating tube is approximate to zero, the cleaning screw and the inner wall of the heating tube cannot abrade each other. The three-screw automatic cleaning and natural circulating evaporator is simple in structure and high in reliability, and is suitable for automatically cleaning the heating tube of the natural circulating evaporator, energy is saved, and yield and effects are improved.

Description

technical field [0001] The invention relates to the automatic cleaning of the dirt in the heating tube of the natural circulation evaporator, and the enhanced energy saving of convective heat transfer; it is mainly suitable for the evaporator which is easy to grow dirt in the heating tube of the evaporator, especially the crystallized salt scale, and can also be used for upward flow Vertical shell and tube heat exchanger. Background technique [0002] Evaporators and heat exchangers are very prone to fouling, especially crystalline brine heat exchangers and evaporators, including high-salt wastewater evaporators. Natural circulation evaporator, the natural circulation flow rate is low, scaling grows in the heating tube, and the efficiency is lower. Therefore, most of them have to use high-power circulating pumps with high energy consumption to force circulation. For example, a large-scale nitrate evaporator system needs to be equipped with thousands of KW forced circulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G13/00
CPCF28G13/00
Inventor 俞天翔俞天兰吴金香俞秀民张治坤冯修燕彭徳其蒋少青刘桂英
Owner 浙江建装工程技术研究有限公司
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