Centrifugal compressor ammonia compressor rapid vibration-prevention method and device

An ammonia compressor and centrifugal technology, applied in the field of anti-turbulence, can solve the problems of damage to the compressor rotor, insufficient volatilization of liquid ammonia, endangering equipment safety, etc., so as to prevent turbulence, stabilize the gas source, and reduce the cooling power consumption. Effect

Inactive Publication Date: 2008-01-09
SICHUAN MEIFENG CHEM IND
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Problems solved by technology

However, if the control is not proper, too much liquid ammonia is added, the liquid ammonia is not volatilized enough, and a gas-liquid two-phase flow is easily formed at the compressor inlet. Since the liquid phase medium is incompressible, the power consumption of the compressor will be high, and in severe cases, it will Damage the compressor rotor, endangering the safety of the equipment

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  • Centrifugal compressor ammonia compressor rapid vibration-prevention method and device

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Embodiment Construction

[0019] The outstanding feature of the present invention is that gaseous ammonia is used instead of liquid ammonia as the supplementary source of the inlet flow of the centrifugal ammonia compressor to prevent turbulence. The specific technical means are: lead a bypass pipeline from the outlet pipeline of the ammonia compressor to communicate with the inlet of the ammonia compressor, and feed the compressed ammonia gas back to the inlet of the ammonia compressor.

[0020] The bypass pipeline can be drawn from the outlet 2 of the first stage of the ammonia compressor, or from the outlet of the second stage 4 or the third stage 5 of the ammonia compressor, but it is better to lead from the outlet of the third stage cooler 5, as shown in Figure 1. In this way, gas ammonia can be provided to the inlet of the ammonia compressor, and the liquefied ammonia in the liquid ammonia storage tank 8 can not be used as the flow replenishment source of the inlet of the ammonia compressor, so as...

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Abstract

This invention discloses centrifuge type ammonia compressor turbulence vibration prevention method and its device. The ammonia gas at ammonia compressor outlet opening is fed back to ammonia compressor inlet opening and mix with compressed ammonia gas. The mixed flow rate is larger than rated minimal inlet opening flow rate of ammonia compressor. Return pipe can be arranged out of any stage of cylinder outlet opening of ammonia compressor. This invention can protect compressor rotor.

Description

technical field [0001] The invention relates to a centrifugal ammonia compressor, especially its anti-turbulence method. Background technique [0002] In ammonia synthesis or process equipment that requires refrigeration, ammonia is generally used as the refrigerant, and centrifugal compressors are used for refrigeration. When the centrifugal compressor is running, if the inlet flow is lower than the rated minimum value, turbulent vibration will occur, and the machine will be damaged in severe cases. For this reason, the occurrence of machine turbulence must be prevented. [0003] Both domestic and foreign centrifugal ammonia compressors directly add liquid ammonia to the compressor inlet and mix it with the compressed gas. The liquid ammonia volatilizes into a gas phase and expands in volume, so that the inlet flow rate is higher than the rated minimum value to prevent turbulence. . However, if the control is not proper, too much liquid ammonia is added, the liquid ammon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66
Inventor 勾永梁黄瑞阳赵醉欧艳琼周裕松
Owner SICHUAN MEIFENG CHEM IND
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