JPH03279683A - Multiple stage compressor - Google Patents

Abstract

PURPOSE:To prevent corrosion wear due to drain attack by letting flow cooling water for respective coolers at first to a post cooler, exchanging heat there, and letting flow the cooling water raised to high temperature to an intercooler. CONSTITUTION:Gas is compressed in a pre-stage compressor 1 to become gas of high temperature and high pressure and let flow into an intercooler 3 to be cooled. At this time, condensed water is generated and drain water is separated with a drain separator 5 and drained. But the drain water cannot be completely separated with the drain separator 5, and the gas containing drain water is sucked into a post stage compressor 2. Hereat, gas of further high pressure and high temperature is generated, and let flow into a post cooler 4 to be cooled. Drain water generated here is separated with a drain separator 6, and gas is let flow into a dryer 7. Meanwhile, cooling water to cool gas is let flow into the post cooler 4, heat is exchanged between gas and water in the post cooler 4, and after rise of water temperature the water is let flow into the intercooler 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of flowing cooling water to each cooler in a multi-stage compressor.

[Conventional technology]

In a conventional multi-stage compressor, cooling water flows first to an intercooler and then to a post-cooler, or to an intercooler and a post-cooler, in order to lower the compressor suction temperature. They were running concurrently.

[Problem to be solved by the invention]

The above conventional technology takes into consideration the fact that when lower temperature cooling water is used, the amount of condensate generated increases. There was a problem of increased wear.

The purpose of the present invention is to further reduce the amount of condensate generated at the outlet of the intermediate stage cooler, and further to lower the gas outlet temperature of the post-cooling stage cooler to provide lower temperature gas. be.

[Means to solve the problem]

In order to achieve the above object, the cooling water flowing to each cooling unit of the multistage compressor of the present invention is first flowed to the downstream cooler, where heat is exchanged, and the cooling water that has become higher temperature is transferred to the intercooler. It was designed to flow to

[Effect]

The cooling water that has passed through the post-cooler flows into the intercooler.

As a result, the cooling water undergoes heat exchange in the post-cooler and reaches a higher temperature, so the amount of drain generated at the outlet of the intercooler can be reduced, which further reduces corrosive wear on the post-stage compressor due to train attack. be able to.

Furthermore, since lower temperature cooling water flows into the second stage cooler, the gas temperature at the outlet of the second stage cooler can be lowered.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
In the figure, the gas is compressed by the pre-stage compressor 1 to become a high-temperature and high-pressure gas, which flows into the intermediate stage cooler 3 and is cooled. At this time, drain, that is, condensed water, is generated, so the drain is separated. The tren is separated and discharged in vessel 5. but,
It is impossible to completely separate the drain in the drain separator, and the gas containing the drain is sucked into the subsequent compressor 2.

Here, the gas becomes even more high-pressure and high-temperature gas, flows into the post-cooler 4, and is cooled. The drain generated here is separated by a drain separator 6, and the gas flows into a dryer 7. On the other hand, the cooling water that cools the gas flows into the post-cooler 4, where it exchanges heat with the gas, and after the water temperature rises, it flows into the intercooler 3. According to this embodiment,
Since the cooling water first flows into the second stage cooler 4, it has the effect of lowering the gas outlet temperature of the second stage cooler 4. In addition, since the cooling water flowing into the intercooler 3 undergoes heat exchange in the post-cooler 4 and its water temperature increases, there is an effect of lowering the amount of drain generated due to supercooling.

〔Effect of the invention〕

According to the present invention, since the amount of tren generated in the intercooler can be suppressed to a lower level, corrosive wear due to tren attack in the rear-stage compressor can be prevented. Furthermore, since the gas temperature at the outlet of the rear cooler can be kept lower, the capacity of the dryer installed at the rear can be further reduced.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of the present invention. 1. Pre-stage compressor, 2. Post-stage compressor, 3...Intermediate cooling-
4～

Claims (1)

[Claims] 1. A multi-stage compressor including an intermediate cooler and a post-cooler, characterized in that a flow of cooling water for cooling compressed gas is introduced from the post-cooler and then flows to the intercooler. compressor.