A shaft sealing structure of a steam compressor in a vacuum concentration device

A steam compressor and vacuum concentration technology, which is applied to the sealing of the engine, mechanical equipment, engine components, etc., can solve problems such as adverse effects on heat transfer performance, and achieve the effect that the heat transfer performance will not deteriorate

Active Publication Date: 2011-03-30
SASAKURA ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when dry seals are used, the problem that leaked air enters the steam side and adversely affects heat transfer performance has become an obstacle to research, and dry seals have not been used so far

Method used

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  • A shaft sealing structure of a steam compressor in a vacuum concentration device
  • A shaft sealing structure of a steam compressor in a vacuum concentration device
  • A shaft sealing structure of a steam compressor in a vacuum concentration device

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Embodiment Construction

[0027] Hereinafter, the present invention will be described in detail based on embodiments. In addition, this invention is not limited to the following embodiment.

[0028] figure 1 It is an overall configuration diagram of a vacuum concentration facility equipped with a vapor compressor according to an embodiment. The vacuum concentrator 1 is provided with a horizontal tube evaporator 2 for evaporating the supplied treatment liquid, and a steam compressor 3 for adiabatically compressing and generating fresh steam, and is configured to use the steam compressor 3 to increase the temperature and pressure The steam returns to the horizontal tube evaporator 2 as a heat source for evaporating the treatment liquid.

[0029] The horizontal tube evaporator 2 includes an evaporation tank 4 formed in a cylindrical shape and capable of storing a treatment liquid inside. A heater 5 composed of a pair of left and right headers 5a, 5b and a plurality of horizontal heat transfer tubes 5c ...

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Abstract

The present invention provides a dry-type shaft sealing structure of a steam compressor in a vacuum concentration device, capable of preventing leakage air from steam. The sealing structure comprises: a dry-type sealing part, in which a sealing surface is of a contact state when a rotating shaft of the steam compressor does not rotate, and the sealing surface is of a non-contact state by a film formed by draw-in air from an airframe when the rotating shaft rotates; a space for air suction, for merging leakage air from the sealing surface of the dry-type sealing part and leakage steam from a steam compression chamber where the inhalant steam is compressed; an aspirating hole, communicate with the space for the air suction; a vacuum pump, for making a state that a vacuum degree is higher than that of the inner of the airframe; a discharge pipe for air suction, connected with the aspirating hole and the vacuum pump. The leakage air and leakage steam is discharged from the space through the discharge pipe by means of the vacuum pump.

Description

technical field [0001] The invention relates to a shaft sealing structure of a steam compressor equipped in a vacuum concentration device used in the evaporation concentration process of waste liquid and the like. Background technique [0002] As the shaft seal of the steam compressor for the current vacuum concentrator, when the steam compressor is small, what is used is a contact mechanical seal (for example: refer to Patent Document 1), and when the steam compressor is large, A steam cleaning method using a multi-stage labyrinth is used (for example: refer to Patent Document 2). [0003] However, in the case of mechanical seals, there are disadvantages such as high energy consumption due to friction loss and unsuitability for high-speed rotation. In the case of a labyrinth seal, there are disadvantages that the structure is complicated, and since steam is used, it is not suitable for facilities without boilers such as small factories. [0004] Patent Document 1: Japanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/00F16J15/16F16J15/447F16J15/54
Inventor 向田民人西村靖史松下哲也池田润一郎平野悟铃木孝太郎
Owner SASAKURA ENG CO LTD
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