Installation for high pressure compression with several stages

Abstract

The invention concerns an installation for high pressure compression with several stages, normally used for producing PET bottles. The inventive installation comprises a main pipe (2) emerging in a baffle plate (3), wherein at least two compressors (4, 5) are mounted in series each having its own drive member (9, 10). The installation is equipped with means (7) for determining the pressure at theoutput of the main pipe (2), said installation being connected to a control box (8). Typically, the control box (8) is connected to at least two of the drive members (9, 10) of the compressors (4, 5)and ensures monitoring of said compressors such that the latter rotate jointly whether charged or uncharged. Thus, the compressors (4, 5) are jointly charged based on the pressure prevailing in the baffle plate (3), such that the charging of the compressor representing the overpressure stage, the compressor(s) of the lower compression stages are automatically and jointly charged.

Description

technical field [0001] The invention relates to a multi-stage high-pressure compression device comprising at least two compressors connected in series by a pipeline. Background technique [0002] High-pressure equipment of this type is used, for example, in the field of production of polyethylene terephthalate (PET) bottles, which require the use of compressed gas at pressures in excess of 2000 kPa. [0003] It is known, in order to achieve a gas pressure of 2000 kPa or more, to install two volumetric compressors in series, and to presuppose a first gas reservoir at the outlet of the first compressor, the outlet of said reservoir being connected to the The inlet of the second compressor is connected, said second compressor is a booster compressor. [0004] At the outlet of the above-mentioned booster compressor, it is generally preferred to preset a second storage, which acts as a buffer for the user network. [0005] In known multistage compressors of this type, the drive...

AI Technical Summary

Problems solved by technology

Another disadvantage of [0011] known multi-stage compressors is that the first accumulator between the two compressors is relatively large in case When the booster compressor is loaded, the gas filled in the first storage is completely consumed before the first compressor is loaded

[0012] Apparently, a large reservoir of this type pre-installed between the compressors increases the volume of the compression equipment, in fact making the compression Equipment costs are also higher

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