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Self-cleaning type reverse natural circulation evaporator

A technology of automatic cleaning and natural circulation, applied in evaporator accessories, evaporator adjustment/control, evaporation, etc., can solve the problems of prolonging the cleaning cycle, achieve the effect of reducing energy consumption, reducing difficulty, and slowing down the scaling speed

Active Publication Date: 2018-06-29
HUNAN UNIV OF TECH
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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 cleaning cycle compared with the natural circulation evaporator, and still needs to stop frequently for cleaning every week

Method used

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  • Self-cleaning type reverse natural circulation evaporator
  • Self-cleaning type reverse natural circulation evaporator

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Embodiment Construction

[0013] Attached below figure 1 , figure 2 , The present invention will be described in further detail.

[0014] An automatic cleaning reverse natural circulation evaporator. The main components are evaporation chamber 1, boiling circulation pipe 11, heating chamber 10, heating pipe 9, limit screen 5, cylindrical spring 6, steel wire spiral 8, limit frame 7 , Steam injection ring 13, bottom tank 14. It also includes an automatic cleaning mechanism composed of at least a steel wire spiral 8, a cylindrical spring 6, a limit frame 7, and a limit screen 5. The steel wire spiral 8 in the heating tube 9 is suspended on the upper end of the cylinder 6. When the cylinder spring 6 expands and contracts, rotates, and vibrates, the circumferential direction is restricted by the limit frame 7. The limit frame 7 is installed and fixed in the upper end of the heating tube 9. The limit screen 5 is installed 10-20 mm above the limit frame 7 to limit the highest position of the telescopic move...

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Abstract

The invention discloses a self-cleaning type reverse natural circulation evaporator. The evaporator comprises a self-cleaning mechanism which at least consists of a steel wire spiral, a cylindrical spring and a limiting frame. During production and operation, the steel wire spiral not only is a convective heat transfer augmentation element, but also triggers up-down floating and sinking movementsfor 10 times each minute and an intermittent vibrated type of slow self-rotating movement under the action of fluctuated flow velocity of two-phase flow at a reverse natural circulation outlet, and uniform and effective cleaning is realized through knocking crystallized salt crust on an inner wall of a heating pipe. Therefore, the purpose of long-term, stable, efficient and continuous production can be achieved, and the energy-saving and yield-increasing benefits are remarkable.

Description

Technical field [0001] The invention relates to an automatic cleaning type reverse natural circulation evaporator, which relates to automatic cleaning and convection heat transfer enhancement in the heating tube of the reverse natural circulation evaporator. It is mainly suitable for positive pressure evaporators and vacuum evaporators that are easy to grow dirt in the heating tube, especially crystalline salt scale. Background technique [0002] Inorganic salt solution evaporators are prone to salt scale, especially salt solution evaporators, including high-salt wastewater evaporators. After the salt fouling in the heating tube, the energy consumption increases and the production capacity decreases, which seriously affects the efficiency of evaporation production. [0003] Most natural circulation evaporators are positive natural circulation evaporators. The natural circulation flow rate is very low, and because of the boiling and vaporization in the heating tube, it is very eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/00B01D1/30
CPCB01D1/00B01D1/0082B01D1/30
Inventor 俞天兰冯修燕俞天翔俞秀民张治坤彭德其吴金香
Owner HUNAN UNIV OF TECH
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