Centrifugal compressor applied by delayed coking process

Abstract

A centrifugal compressor used in a delayed coking process, comprising a main shaft, an impeller, a diaphragm, a coupling, a diffuser, a balance air pipe, an upper casing, a lower casing, a sealing assembly and a bearing, characterized in that: (1) The casing of the compressor is divided into upper and lower parts from the horizontal plane of the rotating shaft. The upper casing is fixed with the lower casing through the sealing bodies at both ends, and the lower casing is fixed on the support; (2) It consists of multiple stages of the same diameter. The back-curved closed impeller, spacer, balance disc and other parts are installed in series on the main shaft to form a rotor, and the rotor is placed on the lower casing through the bearing and bearing seat; (3) The back-curved closed impeller of the same diameter adopts Back-to-back arrangement; (4) When the number of impellers is an even number, they are arranged in a back-to-back arrangement; (5) When the number of impellers is an odd number, the low-pressure section is arranged with one more impeller than the high-pressure section; (6) The front and rear two The balanced gas pipe is installed outside the segment shell The invention is especially suitable for the application of the delayed coking process in petrochemical enterprises, and can improve the efficiency and reduce the cost.

Description

technical field [0001] The invention belongs to the technical field of special equipment for petrochemical industry, and provides a centrifugal compressor used for the delayed coking process of petrochemical industry. Background technique [0002] Delayed coking is a petroleum secondary processing technology. It uses hydrogen-depleted heavy oil as raw material to conduct deep thermal cracking and condensation reactions at high temperatures (about 500°C) to produce rich gas, naphtha, diesel oil, and wax oil. and coke technology. The so-called delay means that the coking oil is heated up to the coking reaction temperature rapidly through the heating furnace, and no coke is produced in the reaction furnace tube, and it is allowed to enter the coke tower for coking reaction. Because of such a "delay", this kind of The technology is called delayed coking technology. [0003] Delayed coking is similar to thermal cracking, except that the raw material is heated to the temperature...

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Problems solved by technology

[0008] However, they are only applicable to the process requirements under certain conditions, and they have not cooperated closely with petrochemical enterprises and adopted the opinions of process design and construction departments, so they have not been popularized and applied.

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