Multi-stage compressor, air-separating apparatus comprising such a compressor, and installation

An air separation and compressor technology, applied in the field of multi-stage compressors, can solve problems such as efficiency loss and flow rate increase

Inactive Publication Date: 2013-07-17
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is required to reduce the pressure on the delivery side of each stage, the characteristics of the compressor wheel are such that this will lead to an increase in the flow rate, which means that the moving blades need to have a greater action (plusloin dans l'action), resulting in an even greater big efficiency loss

Method used

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  • Multi-stage compressor, air-separating apparatus comprising such a compressor, and installation
  • Multi-stage compressor, air-separating apparatus comprising such a compressor, and installation
  • Multi-stage compressor, air-separating apparatus comprising such a compressor, and installation

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Embodiment Construction

[0024] Figure 1 shows a compressor with five stages 1, 2, 3, 4, 5 on the same axis with cooling means R1, R2, R3, R4, R5 between each stage and downstream of the last stage C2. The air 7 is conveyed to the first stage 1 with flow regulating rotor blades.

[0025] During rated operation, the vanes of stage 1 do not reduce the flow rate, and all air compressed in the first stage 1 enters the conduits 15, 19, 21 and passes through the throttle valve V1 without reducing the pressure. This flow rate is then compressed in stages 2, 3, 4, 5.

[0026] In reduced flow rate operation, the vanes of the first stage 1 reduce the flow rate of the air 7 to 70% of the rated flow rate. A flow rate of 12.2% of the rated flow rate is discharged to the outside through the pipe 17 and the pressure reducing valve VD1. The remaining air, which is 57.8% of the rated flow rate, is sent to the cooler R1 and then to the throttle valve, which reduces its pressure to 57.8% of the rated pressure value. ...

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Abstract

A multi-stage compressor, for an air separation unit comprising such a compressor and to an installation is provided.

Description

technical field [0001] The present invention relates to a multi-stage compressor, an air separation device and equipment including such a compressor. Background technique [0002] In an IGCC power generation process using oxygen in a gasifier, part of the air compressed in a gas turbine compressor can be used to feed an air separation unit (ASU), which supplies oxygen to the gasifier. [0003] This arrangement is used to accommodate the operation of gas turbines, which are typically designed to burn gas with a higher calorific value than the gas produced by the gasifier. [0004] The pressure of the air from the gas turbine is usually higher than the air pressure normally used in the ASU. To avoid any power loss, it is advantageous for this air to be used in the ASU at the available pressure. While this air only forms part of the supply to the ASU, the rest of the required air must be compressed in a separate compressor. It is preferable to compress the second air flow ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/02
CPCF04D27/0207F25J3/04781F25J2240/42F25J3/04575F25J3/04018F04D17/12F25J3/04127F04D27/0269F25J3/04606
Inventor B·达勒多
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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