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Centrifugal compressor for device of converting heavy aromatics to light aromatics

A technology for lightening heavy aromatics and centrifugal compressors, which is applied to the components of pumping devices for elastic fluids, mechanical equipment, machines/engines, etc., and can solve problems such as poor economic benefits, low liquid yield, and influence on promotion. , to achieve the effect of reducing design and production costs, improving gas purity and shortening production cycle

Pending Publication Date: 2018-11-06
SHENYANG SITE MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires setting up a series of high and low pressure valves, the actual operation is more complicated, and the requirements for workers' quality and safety awareness are too high
[0005] It seems that the existing heavy aromatics lightening technology requires large investment, low liquid yield, and poor economic benefits, which affects its promotion

Method used

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  • Centrifugal compressor for device of converting heavy aromatics to light aromatics
  • Centrifugal compressor for device of converting heavy aromatics to light aromatics

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1,000,000 tons / year heavy aromatics lightening plant gas-rich compressor unit, the diffuser adopts a vaneless diffuser with an equal-width annular flow channel formed by two parallel walls, and the diameter of the impeller is 450 mm; the vaneless diffuser The ratio of the inner diameter D3 of the impeller to the diameter D2 of the impeller is 1.09; the ratio of the inlet width b5 of the reflux device to the outlet width b4 of the diffuser is 0.75, and the inlet flow rate is 17162Nm3 / h, which meets the flow rate corresponding to the process parameters.

Embodiment 2

[0021] The energy-saving transformation of the gas-rich compressor unit of the 1 million tons / year heavy aromatics lightening plant, the diffuser adopts a vaneless diffuser with an equal-width annular flow channel composed of two parallel walls, and the diameter of the impeller is 450 mm; the vaneless The ratio of the inner diameter D3 of the diffuser to the diameter of the impeller D2 is 1.09; the ratio of the inlet width b5 of the reflux device to the width b4 of the diffuser outlet is 0.75, and the inlet flow rate is 10804Nm3 / h, which meets the flow rate corresponding to the process parameters.

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Abstract

The invention discloses a centrifugal compressor for a device of converting heavy aromatics to light aromatics. The centrifugal compressor mainly comprises a main shaft, an impeller, a partition plate, a coupler, a diffuser, an upper case, a lower case, a sealing assembly and a bearing, and is characterized in that (1) the blade-free diffuser with equal-width annular flow channels composed of twoparallel wall surfaces is adopted; (2) the inner diameter D3 of the blade-free diffuser is 1.03 to 1.12 times of the diameter D2 of the impeller; (3) the compressor adopts the multi-stage impeller with the same diameter; and (4) the inlet width of a backflow device is smaller than the outlet width of the diffuser. The centrifugal compressor for the heavy aromatics lightening device is particularlysuitable for being matched with a heavy aromatics lightening process for use. The centrifugal compressor which is designed according to the requirements of users obtains the consistent praise of petrochemical enterprises.

Description

technical field [0001] The invention belongs to the technical field of special centrifugal compressors, and in particular relates to a centrifugal compressor for a heavy aromatics lightening device. Background technique [0002] In petrochemical enterprises, catalytic reforming and naphtha steam cracking processes have a large number of heavy aromatic by-products, which are currently mainly sold as low-priced fuels. The lightening of heavy aromatics can produce important chemical raw materials such as benzene, toluene, and xylene. With the rapid development of the three major synthetic materials, the process contradiction of aromatics has been exacerbated. It is of great economic value to study the lightening process of heavy aromatics and develop and utilize heavy aromatics to produce useful products such as benzene, toluene and xylene. [0003] Chinese patent 201320735440.2 provides "A Lightweight Reaction Device for Hydrodealkylation of Heavy Aromatics". It includes: re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D17/12F04D29/44
CPCF04D17/122F04D29/441
Inventor 孙忠良
Owner SHENYANG SITE MACHINERY MFG
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