Centrifugal compressor

Abstract

The utility model provides a centrifugal compressor which comprises a first-stage impeller, a second-stage impeller, a partition plate, a bend, a gas inlet, a gas outlet, a shell and the like, and a plurality of spraying water pipes leading to the bend between the first-stage impeller and the second-stage impeller are arranged on the circumference of the shell. According to the centrifugal compressor disclosed by the utility model, the gas compressed by the impeller is cooled by spraying water at the outlet curve, so that the problems of quicker and higher temperature rise in a furnace gas compression process are solved, and the cleaning of the impeller and the dust removal of gas in a subsequent process are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical equipment, concretely relates to a centrifugal compressor mainly used for calcining furnace gas recovery process in combined soda production. BACKGROUND

[0002] Reciprocating compressor has been the main equipment of calcining furnace gas recovery and pressurization for soda production industry. Because of the complex composition of furnace gas, containing carbon dioxide, nitrogen, water vapor, ammonia and soda dust, the corrosion resistance and sealing of the compressor are extremely high. Because the process cannot effectively solve the gas cleanliness, there are problems such as scarring, dust carrying, crystallization, compression temperature rise, high-speed vibration, which affect long-term, safe and stable operation. The industry traditionally uses the method of parallel operation of multiple reciprocating (or screw) compressor devices to solve the problem of high single machine failure rate and affect long-term operation of the system. This not only occupies a large area, but also has high maintenance cost. The existing centrifugal compressor can provide high flow and low operating cost, but due to the cleanliness problem of the furnace gas, the impeller of the centrifugal compressor will inevitably be damaged in use, and there will be problems of rapid and high temperature rise in the process of furnace gas compression. SUMMARY

[0003] The utility model discloses a centrifugal compressor to solve the problem of using compressor in the process of calcining furnace gas recovery in soda production industry.

[0004] The centrifugal compressor, comprising a primary impeller, a secondary impeller, a partition, a curved channel, a gas inlet, a gas outlet and a shell, a plurality of spray water pipes leading to the curved channel between the primary impeller and the secondary impeller are arranged on the circumference of the shell to spray water to cool the gas compressed by the primary impeller and keep the secondary impeller clean.

[0005] The centrifugal compressor is divided into two sections and provided with two gas inlets and gas outlets.

[0006] The centrifugal compressor is driven by a steam turbine or a variable frequency motor.

[0007] The centrifugal compressor is further provided with a tertiary impeller, and a plurality of spray water pipes leading to the curved channel between the secondary impeller and the tertiary impeller are arranged on the circumference of the shell.

[0008] The centrifugal compressor sprays water to cool the gas compressed by the impeller at the outlet curved channel to solve the problems of rapid and high temperature rise in the process of furnace gas compression and keep the impeller clean and the dust of the gas in the subsequent process. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 The utility model relates to the technical field of chemical equipment, concretely relates to a centrifugal compressor mainly used for calcining furnace gas recovery process in combined soda production. DETAILED DESCRIPTION

[0010] The specific embodiment of the utility model is further explained below in combination with the drawings:

[0011] As Figure 1 shown, the centrifugal compressor of the utility model embodiment is a two-stage centrifugal compressor, which is provided with a first-stage gas inlet 11 and a first-stage gas outlet 12, a second-stage gas inlet 21 and a second-stage gas outlet 22; a first-stage primary impeller 13, a first-stage secondary impeller 14, a second-stage primary impeller 23, a second-stage secondary impeller 24, a partition plate 3, a curved channel 4, a shell 5, etc. The circumference of the shell is provided with 16 first-stage spray water pipes 15 leading to the curved channel between the first-stage primary impeller 13 and the first-stage secondary impeller 14, and 16 second-stage spray water pipes 25 leading to the curved channel between the second-stage primary impeller 23 and the second-stage secondary impeller 24.

Claims

1. A centrifugal compressor comprising a first stage impeller, a second stage impeller, a diaphragm, a bend, a gas inlet, a gas outlet, a casing; characterized in that: The circumference of the shell is provided with a plurality of spray pipes leading to the curved channel between the primary impeller and the secondary impeller, so as to spray water to cool the compressed gas by the primary impeller, facilitate dust removal of the gas in the subsequent link, and facilitate cleaning of the secondary impeller.

2. A centrifugal compressor according to claim 1, characterised in that It is a two-section type and is provided with two gas inlets and a gas outlet.

3. A centrifugal compressor according to claim 1, characterized in that It is driven by a steam turbine or a variable frequency motor.

4. A centrifugal compressor according to claim 1, characterized in that A tertiary impeller is further arranged, and the circumference of the shell is provided with a plurality of spray pipes leading to the curved channel between the secondary impeller and the tertiary impeller.

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