Methane tail gas supercharger

Abstract

The invention discloses a methane tail gas supercharger, and relates to the field of superchargers. The methane tail gas supercharger comprises an upper shell and a lower shell, the upper shell is fixed to the lower shell through sealing bodies at the two ends, and the lower shell is fixed to a support. An air inlet cylinder A, an air outlet cylinder A, an air inlet cylinder B and an air outlet cylinder B are arranged below the lower shell; a main shaft is arranged in a cavity formed by the upper shell and the lower shell, one end of the main shaft is connected with a coupler so as to be connected with a driving machine, and the other end of the main shaft is connected with a bearing. According to the methane tail gas supercharger, the impeller is a stainless steel closed impeller, the supercharger is a product designed through continuous practice and research on the basis of the prior art, and detailed research and improvement are conducted on all aspects of a unit, so that the working efficiency of the supercharger is greatly improved, the manufacturing and maintenance cost of the supercharger is greatly reduced, and the service life of the supercharger is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of supercharger, in particular to a methane tail gas supercharger matched with ethylene three-machine operation. BACKGROUND

[0002] Ethylene is produced by cracking petroleum hydrocarbons, which is a process of generating small molecular hydrocarbons by cracking large molecular hydrocarbons under the condition of air isolation and high temperature. The overall cracking process is very complex, in addition to dehydrogenation, chain breaking, diene synthesis, ring opening decomposition, and alkyl aromatic hydrocarbon dealkylation or dehydrogenation reaction, there are also hydrogenation, aromatization, isomerization and polymerization reactions to obtain ethylene, propylene, butadiene, aromatic hydrocarbons and other products such as hydrogen and methane. Methane is the second largest greenhouse gas, accounting for 14% of global greenhouse gas emissions, and its role in climate warming caused by human factors is more than one-third. From the perspective of energy and economy, methane is the main component of natural gas, which is a valuable and clean energy.

[0003] In order to match with ethylene production and solve the problem of recycling methane tail gas during ethylene three-machine operation, a device for supercharging methane tail gas is required, which is the purpose of the present application. SUMMARY

[0004] (I) Technical problems to be solved In view of the deficiencies in the prior art, the present application discloses a methane tail gas supercharger to solve the problems raised in the background art.

[0005] (II) Technical scheme In order to achieve the above purpose, the present application is realized by the following technical scheme: a methane tail gas supercharger comprises an upper shell and a lower shell, the upper shell is fixed with the lower shell through the sealing body at both ends, and the lower shell is fixed on a support; An air inlet cylinder A, an air outlet cylinder A, an air inlet cylinder B and an air outlet cylinder B are arranged below the lower shell; A main shaft is arranged inside the cavity composed of the upper shell and the lower shell, one end of the main shaft is connected with a shaft coupling, and the other end of the main shaft is connected with a bearing; A impeller is installed on the main shaft, and a sealing assembly is arranged on the main shaft The inside of the upper shell is provided with a partition plate.

[0006] Preferably, the blades of the rear impeller are deflected by 5-15 degrees relative to the blades of the front impeller between the two adjacent impellers.

[0007] Preferably, the impeller adopts a stainless steel closed impeller, and the blades adopt a rear bending structure.

[0008] Preferably, the blades of the latter impeller are arranged to be deflected at a certain angle relative to the blades of the former impeller.

[0009] Preferably, the impeller adopts a back-curved isostatic structure, and the blades and the hub are integrated, and the connection between the blades and the disc adopts a welding structure.

[0010] Preferably, the surface of the upper shell is provided with bolts, and the upper shell is bolted and fixed with the lower shell.

[0011] The application discloses a methane tail gas supercharger, which has the following beneficial effects: 1. The methane tail gas supercharger adopts a stainless steel closed impeller, and the blades adopt a back-curved structure, compared with an open impeller of other products, the overall efficiency of the unit is greatly improved.

[0012] 2. The methane tail gas supercharger is designed on the basis of continuous practice and research, and each aspect of the unit is carefully researched and improved, so that the working efficiency, manufacturing and maintenance cost and service life of the product are greatly improved. The methane tail gas supercharger is highly praised by users and welcomed by the majority of users in the use process. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a main sectional view of the methane tail gas supercharger; Figure 2 FIG. 2 is an outline drawing of the methane tail gas supercharger.

[0014] In the drawings: 1, air inlet cylinder A; 2, air outlet cylinder A; 3, air inlet cylinder B; 4, air outlet cylinder B; 5, upper shell; 6, lower shell; 7, main shaft; 8, impeller; 9, sealing assembly; 10, partition plate; 11, bearing; 12, shaft coupling; 13, bolt. DETAILED DESCRIPTION

[0015] In the description of the application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "linkage", "fixation" should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0016] The standard parts used in the application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings.

[0017] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0018] A methane tail gas supercharger of the application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] According to the technical requirements of Figure 1 , 2 , each part is machined and manufactured, including the upper casing 5 and the lower casing 6 of the air inlet cylinder 1, 3 and the air outlet cylinder 2, the main shaft 7, the impeller 8, the sealing assembly 9, the partition plate 10, the bearing 11, the shaft coupling 12, and then the impeller and the spacer sleeve, the balance disc, the thrust disc and other parts are installed on the main shaft to form the rotor, and the shaft coupling is installed at one end of the rotor to be connected with the driving machine.

[0020] The methane tail gas supercharger comprises an upper casing 5 and a lower casing 6, the upper casing 5 is fixed with the lower casing 6 through the sealing body at both ends, and the lower casing 6 is fixed on the support; An air inlet cylinder A1, an air outlet cylinder A2, an air inlet cylinder B3 and an air outlet cylinder B4 are arranged below the lower casing 6; A main shaft 7 is arranged inside the cavity composed of the upper casing 5 and the lower casing 6, one end of the main shaft 7 is connected with a shaft coupling 12 to be connected with the driving machine, and the other end of the main shaft 7 is connected with a bearing 11; An impeller 8 is installed on the main shaft 7, and a sealing assembly 9 is arranged on the main shaft 7; A partition plate 10 is arranged inside the upper casing 5; Embodiment 1 This embodiment 1 is a seven-stage centrifugal supercharger, the impeller adopts a three-element plus two-element closed impeller, the blades adopt a rear bending structure, and the blades between the front and rear impellers are deflected by 5 degrees; the diffuser adopts a bladeless diffuser and a blade diffuser.

[0021] Embodiment 2 This embodiment 2 is an eight-stage centrifugal supercharger, the impeller adopts a three-element plus two-element closed impeller, the blades adopt a rear bending structure, and the blades between the front and rear impellers are deflected by 10 degrees; the diffuser adopts a bladeless diffuser and a blade diffuser.

[0022] Embodiment 3 The embodiment 3 is an eight-stage centrifugal supercharger, the impeller adopts three-element plus two-element closed impeller, the blade adopts rear bending structure, the blades between the front and rear impellers are deflected by 15 degrees; the diffuser adopts vaneless diffuser and blade diffuser.

[0023] The above only describes the preferred embodiments of the present application and is not intended to limit the content of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0024] The basic principles and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A methane tail gas booster comprising an upper casing (5) and a lower casing (6), characterized in that: The upper shell (5) is fixed with the lower shell (6) through the sealing bodies at both ends, and the lower shell (6) is fixed on the support; The lower shell (6) is provided with an air inlet cylinder A (1), an air outlet cylinder A (2), an air inlet cylinder B (3) and an air outlet cylinder B (4) below; The cavity formed by the upper shell (5) and the lower shell (6) is internally provided with a main shaft (7), one end of the main shaft (7) is connected with a shaft coupling (12) and is connected with a driving machine, and the other end of the main shaft (7) is connected with a bearing (11); The main shaft (7) is provided with a sealing assembly (9) The inside of the upper shell (5) is provided with a partition plate (10).

2. A methane tail gas booster as claimed in claim 1, characterised in that: The blades of the rear impeller (8) are set to be deflected by 5-15 degrees relative to the blades of the front impeller.

3. A methane tail gas booster as claimed in claim 1, characterized in that: The impeller (8) adopts a stainless steel closed impeller (8), and the blades adopt a rear bending structure.

4. A methane tail gas booster as claimed in claim 1, characterized in that: The blades of the rear impeller (8) are set to be deflected by a certain angle relative to the blades of the front impeller (8).

5. A methane tail gas booster as claimed in claim 1, characterized in that: The impeller (8) adopts a rear bending type equal strength structure, and the blades and the hub are integrated, and the connection between them and the disc adopts a welding structure.

6. A methane tail gas booster as claimed in claim 1, characterized in that: The surface of the upper shell (5) is provided with bolts (13), and the upper shell (5) is bolted with the lower shell (6) through the bolts (13).

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