CN112268006A

CN112268006A - Methane tail gas booster compressor

Info

Publication number: CN112268006A
Application number: CN202011206498.9A
Authority: CN
Inventors: 孙忠良
Original assignee: Shenyang Site Machinery Manufacturing Co ltd
Current assignee: Shenyang Site Machinery Manufacturing Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-01-26

Abstract

The invention relates to a methane tail gas supercharger, which is characterized in that: (1) the shell of the supercharger is divided into an upper shell and a lower shell from the horizontal plane of the rotating shaft, the upper shell is fixed with the lower shell through sealing bodies at two ends, and the lower shell is fixed on the support; (2) the impeller, the spacer bush, the balance disc, the thrust disc and other parts are arranged on the main shaft to form an important part of the supercharger, namely a rotor, and the rotor is arranged on the lower shell through a bearing and a bearing seat; (3) the diffuser adopts the combination of a vaneless diffuser and a vane diffuser, wherein the vaneless diffuser is arranged in front of the vane diffuser, and the vane diffuser is arranged behind the vane diffuser; (4) a plurality of cascade impellers are adopted, and between two adjacent impellers, the blade of the latter impeller is arranged to deflect a certain angle relative to the blade of the former impeller; (5) the blades are of a backward bending type constant-strength structure, the blades and the hub are integrated, and the blades and the wheel disc are connected by adopting a welding structure; (6) two air inlet air cylinders and two air outlet air cylinders are arranged below the supercharger.

Description

Methane tail gas booster compressor

Technical Field

The invention relates to the technical field of superchargers, in particular to a methane tail gas supercharger which is matched with an ethylene three-machine in operation.

Background

The cracking of petroleum hydrocarbon to prepare ethylene is the process of decomposing macromolecular hydrocarbon in cracking material to produce small molecular hydrocarbon in the condition of isolating air and high temperature. The overall cracking process is a very complex process, and includes reactions such as dehydrogenation, chain scission, diene synthesis, ring opening decomposition, dealkylation or dehydrogenation of alkyl aromatics, hydrogenation, aromatization, isomerization, polymerization and the like, so as to obtain ethylene, propylene, butadiene, aromatics and other products, such as hydrogen, methane and the like. Methane is the second largest greenhouse gas, accounting for 14% of global greenhouse gas emissions, and has more than one third of its role in anthropogenic climate warming, whereas methane is a major component of natural gas from an energy and economic perspective, and is a valuable, clean energy source.

In order to be matched with ethylene production and solve the problem of recycling the methane tail gas during the operation of an ethylene three-machine, a device for pressurizing the methane tail gas is required, and the aim of the invention is to provide the device.

Disclosure of Invention

The invention seeks a methane tail gas supercharger in order to solve the problems of recycling of tail gas during the operation of an ethylene three-machine and reducing the production cost.

The invention relates to a methane tail gas supercharger, which mainly comprises: main shaft, impeller, spacer bush, thrust disc, balance disc, diffuser, bend, exit volute chamber, sealed, bearing group part, casing etc. its characterized in that:

(1) the shell of the supercharger is divided into an upper shell and a lower shell from the horizontal plane of the rotating shaft, the upper shell is fixed with the lower shell through sealing bodies at two ends, and the lower shell is fixed on the support;

(2) the impeller, the spacer bush, the balance disc, the thrust disc and other parts are arranged on the main shaft to form an important part of the supercharger, namely a rotor, and the rotor is arranged on the lower shell through a bearing and a bearing seat;

(3) the diffuser adopts the combination of a vaneless diffuser and a vane diffuser, wherein the vaneless diffuser is arranged in front of the vane diffuser, and the vane diffuser is arranged behind the vane diffuser;

(4) a plurality of cascade impellers are adopted, and between two adjacent impellers, the blade of the latter impeller is arranged to deflect a certain angle relative to the blade of the former impeller;

(5) the blades are of a backward bending type constant-strength structure, the blades and the hub are integrated, and the blades and the wheel disc are connected by adopting a welding structure;

(6) two air inlet air cylinders and two air outlet air cylinders are arranged below the supercharger.

The invention relates to a methane tail gas supercharger, wherein between two adjacent impellers, the blade of the latter impeller is arranged to deflect 5-15 degrees relative to the blade of the former impeller.

According to the methane tail gas supercharger, the impeller is a stainless steel closed impeller, the blades are in a blade form of a backward bending structure, and compared with open impellers of other products, the whole efficiency of the unit is greatly improved.

The methane tail gas supercharger is a product designed through continuous practice and research on the basis of the prior art, and careful research and improvement are made on all aspects of the unit, so that the working efficiency, the manufacturing and maintenance cost and the service life of the product are greatly improved. The methane tail gas supercharger is uniformly favored by users in the using process of the users, and is welcomed by the users.

Drawings

Fig. 1 is a front sectional view of a methane tail gas booster of the present invention.

Fig. 2 is an external view of a methane tail gas booster according to the present invention.

The components in the above figures are as follows: the

air inlet cylinder

1, 3, the

air outlet cylinder

2, 4, the upper casing 5, the lower casing 6, the main shaft 7, the impeller 8, the sealing component 9, the partition board 10, the bearing 11, the coupler 12 and the bolt 13.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

According to the technical requirements of figures 1 and 2, parts including

air inlet cylinders

1 and 3,

air outlet cylinders

2 and 4, an upper casing 5, a lower casing 6, a main shaft 7, an impeller 8, a sealing assembly 9, a partition plate 10, a bearing 11 and a coupling 12 are machined and manufactured respectively, the impeller, a spacer bush, a balance disc, a thrust disc and other parts are sequentially installed on the main shaft to form a rotor, and the coupling is installed at one end of the rotor so as to be connected with a driving machine.

Example 1

The embodiment 1 is a seven-stage centrifugal supercharger, wherein an impeller adopts a ternary-plus-binary closed impeller, blades of the impeller adopt a backward bending structure, and the blades of the front impeller and the rear impeller deflect by 5 degrees; the diffuser adopts a vaneless diffuser and a vane diffuser.

Example 2

In this embodiment 2, the centrifugal supercharger is an eight-stage centrifugal supercharger, the impeller is a ternary plus binary closed impeller, the blades of the impeller are of a backward bending structure, and the blades of the front impeller and the rear impeller deflect by 10 degrees; the diffuser adopts a vaneless diffuser and a vane diffuser.

Example 3

In this embodiment 3, an eight-stage centrifugal supercharger is adopted, an impeller is a ternary plus binary closed impeller, blades of the impeller are of a backward bending structure, and the blades of the front impeller and the rear impeller deflect by 15 degrees; the diffuser adopts a vaneless diffuser and a vane diffuser.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A methane tail gas booster compressor mainly comprises: main shaft, impeller, spacer bush, thrust disc, balance disc, diffuser, bend, exit volute chamber, sealed, bearing group part, casing etc. its characterized in that:

2. The methane tail gas supercharger according to claim 1, wherein between two adjacent impellers, the vane of the latter impeller is arranged to be deflected by 5 to 15 degrees with respect to the vane of the former impeller.

3. The methane tail gas booster according to claim 1, wherein the impeller is a stainless steel shrouded impeller, and the vanes are in the form of backward-curved vanes.