Heat transfer intensification and automatic cleaning mechanism of natural circulation evaporator

A technology of automatic cleaning and heat transfer enhancement, which is applied to cleaning heat transfer devices, flushing, lighting and heating equipment, etc. It can solve the problems of low natural circulation flow rate, difficult promotion, frequent parking and cleaning, etc., and achieves convenient manufacturing, installation and maintenance Easy, simple structure and reliable effect

CN108317890AInactive Publication Date: 2018-07-24HUNAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-07-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a heat transfer intensification and automatic cleaning mechanism of a natural circulation evaporator. The automatic cleaning mechanism at least comprising straight leaf discs,heat transfer intensification and automatic cleaning function screws and hanging weights is mounted on heating pipes of the center circulating pipe natural circulation evaporator. When the mechanism operates, the straight leaf discs utilize rise of ram pressure of undulatory flows of vapor-liquid two-phase flows at orifice sections of the heating pipes; the hanging weights provide downward movement power; and the function screws make up and down reciprocating motion with a stroke of 20-100mm, autorotate slowly or radially vibrate quickly for automatic cleaning and convective heat transfer intensification of inner walls of the pipes. The automatic cleaning mechanism is reliable and simple in structure, is applicable to the heat transfer intensification and automatic cleaning of the heatingpipes of the vertical shell and tube natural circulation evaporator, an evaporating crystallizer, and a reboiler.
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Description

technical field

[0001] The invention relates to a heat transfer enhanced automatic cleaning mechanism of a natural circulation evaporator, and relates to a convective heat transfer enhanced automatic cleaning in heating pipes of a natural circulation evaporator and a reboiler. It is mainly suitable for automatic cleaning of natural circulation vertical tube evaporators, evaporation crystallizers and reboilers that are prone to crystallization salt scale in the heating tube. Background technique

[0002] The natural circulation vertical tube evaporator is one of the most traditional and simple evaporators in structure, but the natural circulation flow rate is low, the heating tube is easy to scale when the salt solution evaporates, frequent parking and cleaning, low efficiency and high energy consumption. Therefore, it cannot be applied to the evaporation production of high-salt solution. Although the literature introduces the vapor-liquid-solid three-phase fluidization tech...

Examples

Embodiment Construction

[0014] Attached below figure 1 , figure 2 , image 3 , the present invention is described in further detail.

[0015] In the figure, 1 evaporation chamber 2 manhole 3 top weir 4 limit screen 5 straight leaf disk 6 function spiral 7 heating pipe 8 heating chamber 9 straight section steel wire 10 hanging weight 11 bottom tank 12 central circulation pipe 13 communication pipe liquid level gauge 14 Hook shoulder 15 Straight leaf 16 Cylindrical shaft 17 Hanging hole 18 Impact plate

[0016] A heat transfer enhanced automatic cleaning mechanism for a natural circulation evaporator, the main structural components include an evaporation chamber 1, a heating pipe 7, a heating chamber 8, a bottom tank 11, a straight leaf disc 5, a functional spiral 6, and a hanging weight 10.

[0017] The natural circulation evaporator is at least composed of an evaporation chamber 1 , a central circulation pipe 12 , a heating chamber 8 and a bottom tank 11 . The heating tube 7 is equipped with a h...