Single-shaft plusing multiple-shaft type carbon dioxide gas centrifugal compressor unit

A carbon dioxide, compressor unit technology, applied in mechanical equipment, non-variable-capacity pumps, machines/engines, etc., can solve problems such as high gear pitch speed, waste of energy, and reduced operational reliability, and achieve a high single-stage pressure ratio. , The effect of improving stage efficiency and reliability
CN102979751AActive Publication Date: 2013-03-20西安赛尔机泵成套设备有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
西安赛尔机泵成套设备有限责任公司
Publication Date
2013-03-20

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Abstract

A single-shaft plusing multiple-shaft type carbon dioxide gas centrifugal compressor unit comprises a double extended shafts type driving device. A diaphragm coupling which is used for a left extended shaft of the double extended shafts type driving device is directly connected with a single-shaft type low pressure cylinder. The diaphragm coupling which is used for a right extended shaft of the double extended shafts type driving device is connected with a multiple-shaft type high pressure cylinder. Carbon dioxide gas enters into a first stage impeller of the single-shaft type low pressure cylinder, after four stage compression, the carbon dioxide gas flows out through a back outlet pipeline of a fourth stage of the low pressure cylinder and then enters into a first stage impeller of the multiple-shaft type high pressure cylinder. After another four stage compression, the carbon dioxide gas is discharged from a fourth stage impeller of the multiple-shaft type high pressure cylinder 3 and enters into subsequent process system. The single-shaft plusing multiple-shaft type carbon dioxide gas centrifugal compressor unit can save energy by over 10 % compared with the existing single-shaft plusing multiple-shaft type device and is high in security and stability compared with the multiple-shaft type carbon dioxide gas compressor in foreign.
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Description

technical field

[0001] The invention relates to a centrifugal compressor unit for pressurizing carbon dioxide in a urea plant, and also relates to the EOR technology (oil field injection CO 2 A single-shaft + multi-shaft carbon dioxide centrifugal compressor unit required in the fields of enhanced crude oil recovery), CCS technology (carbon capture and storage), and pulverized coal spraying in coal gasifiers in coal chemical industry. Background technique

[0002] 1. At present, most of the centrifugal carbon dioxide compressor units of urea plants at home and abroad adopt the model of "steam turbine + single-shaft low-pressure cylinder + gearbox + single-shaft high-pressure cylinder". This model has the following technical defects:

[0003] The first defect is that the high-pressure cylinder with small flow rate and high-pressure ratio adopts a single-axis type, and the efficiency is very low.

[0004] Example: A well-known turbine machinery manufacturing company in the U...

Claims

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