Machine core and synthesis gas compressor

Abstract

The invention provides a machine core and a synthesis gas compressor. The machine core comprises a rotor system, and the peripheral face of the rotor system is sequentially sleeved with an inlet partition plate, a first-section partition plate, a second-section inlet partition plate, an air-entrapping supporting partition plate, a second-section partition plate, a circulation-section inlet partition plate and an outlet partition plate; the first section of partition plate comprises a first end face, and a section of exhaust volute chamber is arranged at the end, making contact with the first end face, of the inlet partition plate. An air-entrapping volute chamber is arranged on the air-entrapping supporting partition plate; the first-section exhaust volute chamber is arranged above the first-section last-stage impeller in the radial direction. And the air-entrapping volute chamber is arranged above the backflow device at the stage where the air-entrapping volute chamber is located along the radial direction. The first-section exhaust volute chamber is arranged above the first-section tail end impeller in the radial direction; the air-entrapping volute chamber is arranged above the inlet of the backflow device of the stage where the air-entrapping volute chamber is located in the radial direction, the increase of the axial supporting span caused by a multi-volute-chamber structure is reduced, and on the premise that the rigidity of a rotor system is not affected, the unit structure operation efficiency is improved, and the unit energy consumption is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of gas compression, and in particular relates to a movement and a synthetic gas compressor. Background Art

[0002] Methanol synthesis gas compressor is the core power equipment of methanol unit. Traditional methanol synthesis gas compressor consists of fresh process gas compression section and circulation section, and adopts the form of sequential cylinder mixing arrangement, that is, fresh process gas enters the compressor and is compressed to the design pressure through multiple stages, and then mixed with the unreacted circulating gas injected into the reaction tower at the inlet of the circulation section, and then enters the next stage of the compressor and is compressed to the process design pressure, and then flows to the methanol synthesis tower through the process pipeline to participate in the synthesis reaction. The compressor body flow core structure consists of impeller and inlet and outlet partitions with volute chamber, intermediate stage partition, cylinder seal, etc. The volute chamber is usually set between the two-stage impeller, occupying a certain axial length.

[0003] With the continuous development of methanol synthesis gas compressor technology, the methanol synthesis unit served by the methanol synthesis gas compressor requires that in addition to the traditional circulating aeration volute, a purge gas should be injected into the middle of the fresh process gas compression section. In addition, in order to control the exhaust temperature and save the power consumption of the compressor, the fresh process gas needs to be discharged from the compressor for cooling and then injected into the compressor for compression and pressure increase when the temperature reaches a certain value after several stages of compression. This means that in addition to the intake volute, circulating aeration volute and final exhaust volute, the compressor structure also needs to set up a first exhaust volute, a second intake volute and a purge gas aeration volute, a total of 6 volutes. If the traditional structure is adopted, since multiple volutes occupy a large amount of axial length, the compressor rotor support span is too long, which in turn causes the rotor system to be insufficiently rigid, causing large rotor vibration and even unable to operate normally and smoothly. Summary of the invention

[0004] Therefore, the present application is to provide a movement and a synthetic gas compressor to at least solve one technical problem existing in the prior art.

[0005] In order to solve the above problems, the present application provides a movement in a first aspect, including:

[0006] A rotor system, wherein the outer circumference of the rotor system is sequentially provided with an inlet baffle, a first-stage baffle, a second-stage inlet baffle, an aeration support baffle, a second-stage baffle, a circulation stage inlet baffle and an outlet baffle;

[0007] The first partition plate includes a first end surface, and the contact end of the inlet partition plate and the first end surface is provided with an exhaust volute;

[0008] The aeration support baffle is provided with an aeration volute;

[0009] The exhaust volute is radially arranged above a last-stage impeller; the gas-injection volute is radially arranged above the returner of the stage where the gas-injection volute is located.

[0010] Optionally, the exhaust volute section adopts a variable-section spiral structure, and gas is discharged tangentially along the exhaust volute section.

[0011] Optionally, the aerated volute adopts a spiral structure with a constant cross-section and a spoiler at the tail end, or a spiral structure with a variable cross-section and a spoiler at the tail end, and air is tangentially inlet along the aerated volute.

[0012] Optionally, the rotation direction of the air-injection volute is consistent with the rotation direction of the compressor rotor.

[0013] Optionally, an air intake volute is provided on the end surface of the inlet partition, and the air intake volute is arranged opposite to the first stage exhaust volute;

[0014] The first-stage partition plate further comprises a second end surface, and the contact end between the second-stage inlet partition plate and the second end surface is provided with a second-stage inlet volute chamber;

[0015] A circulating air intake volute is provided at the contact end between the circulating section inlet baffle and the second section baffle;

[0016] The end surface of the outlet partition is provided with a final exhaust volute communicating with the circulating intake volute.

[0017] Optionally, the air intake volute chamber adopts a variable-section spiral structure with diverter ribs, and air is vertically inlet along the air intake volute chamber.

[0018] Optionally, the second-stage air intake volute chamber adopts a variable-section spiral structure with diverter ribs, and air is vertically inlet along the side of the second-stage air intake volute chamber.

[0019] Optionally, the circulating air intake volute adopts a variable-section spiral structure with diverter ribs, and air is vertically inlet along the circulating air intake volute.

[0020] Optionally, the final exhaust volute chamber adopts a variable-section spiral structure, and gas is discharged tangentially along the final exhaust volute chamber.

[0021] A second aspect of the present application provides a synthesis gas compressor, comprising a casing, a thrust side end cover bearing area, a support side end cover bearing area and a movement as described in any one of the above; the movement is arranged in the casing, the thrust side end cover bearing area is arranged at the air inlet end of the casing, and the support side end cover bearing area is arranged at the air outlet end of the casing.

[0022] Beneficial Effects

[0023] An embodiment of the present application provides a movement and a synthetic gas compressor, in which a section of exhaust volute is radially arranged above a section of terminal impeller; and an air filling volute is radially arranged above the return flow inlet of the stage where the air filling volute is located, thereby reducing the increase in axial support span caused by the multi-volute structure, and improving the unit structure operating efficiency and reducing the unit energy consumption without affecting the insufficient rigidity of the rotor system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of the structure of the synthesis gas compressor according to an embodiment of the present application;

[0025] Figure 2 A cross-sectional view of the movement structure of an embodiment of the present application;

[0026] Figure 3 This is an axonometric diagram of the structure of the synthesis gas compressor according to an embodiment of the present application;

[0027] Figure 4 This is a cross-sectional view of a section of an exhaust volute chamber according to an embodiment of the present application;

[0028] Figure 5 A cross-sectional view of the aerated volute chamber of an embodiment of the present application;

[0029] Figure 6 This is a cross-sectional view of the inlet volute chamber of an embodiment of the present application;

[0030] Figure 7 This is a cross-sectional view of a two-stage intake volute chamber according to an embodiment of the present application;

[0031] Figure 8 This is a cross-sectional view of the circulating air intake volute chamber of an embodiment of the present application;

[0032] Fig. 9 This is a cross-sectional view of the final exhaust volute chamber of the embodiment of the present application.

[0033] The reference numerals are:

[0034] 1- housing;

[0035] 2- movement; 201- rotor system; 202- inlet baffle; 203- first section baffle; 204- second section inlet baffle; 205- aeration support baffle; 206- second section baffle; 207- circulation section inlet baffle; 208- outlet baffle; 209- screw; 2010- nut; 2011- inlet volute; 2012- first section exhaust volute; 2013- second section inlet volute; 2014- aeration volute; 2015- circulation inlet volute; 2016- final exhaust volute; 2017- first section exhaust port; 2018- second section inlet port; 2019- aeration port; 2020- inlet port; 2021- circulation inlet port; 2022- final exhaust port; 2023- stage baffle;

[0036] 3-Thrust side end cover bearing area;

[0037] 4-Support side end cover bearing area. DETAILED DESCRIPTION

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] See also Figures 1 to 9As shown, according to the first aspect of an embodiment of the present application, a movement is provided, including a rotor system 201, the outer circumferential surface of the rotor system 201 is sequentially provided with an inlet baffle 202, a first-stage partition plate 203, a second-stage inlet baffle plate 204, an aeration support baffle plate 205, a second-stage partition plate 206, a circulation section inlet baffle plate 207 and an outlet baffle plate 208; the first-stage partition plate 203 includes a first end face, and an exhaust volute 2012 is provided at the contact end between the inlet baffle plate 202 and the first end face; an aeration volute 2014 is provided on the aeration support baffle plate 205; an exhaust volute 2012 is radially arranged above a last-stage impeller; and the aeration volute 2014 is radially arranged above the recirculator of the stage where the aeration volute 2014 is located.

[0043] An exhaust volute 2012 is radially arranged above a terminal impeller; an air-filling volute 2014 is radially arranged above the return flow inlet of the stage where the air-filling volute 2014 is located, thereby reducing the increase in the axial support span caused by the multi-volute structure, improving the unit structure operation efficiency and reducing the unit energy consumption without affecting the insufficient rigidity of the rotor system 201.

[0044] Among them, the outer circumference of the rotor system 201 is sequentially equipped with an inlet baffle 202, a first-section partition 203, a second-section inlet baffle 204, an aerated support baffle 205, a second-section partition 206, a circulation section inlet baffle 207 and an outlet baffle 208; that is, the inlet baffle 202 is located at the air inlet end, and the outlet baffle 208 is located at the air outlet end, and the inlet baffle 202, the first-section partition 203, the second-section inlet baffle 204, the aerated support baffle 205, the second-section partition 206, the circulation section inlet baffle 207 and the outlet baffle 208 are arranged in sequence along the flow direction of the airflow.

[0045] Specifically, the inlet partition 202, the first-stage partition 203, the second-stage inlet partition 204, the aeration support partition 205, the second-stage partition 206 and the circulation section inlet partition 207 are assembled in series through screws 209 and locked with nuts 2010 to form an inner casing.

[0046] Among them, stage partitions 2023 are arranged between the inlet partition 202 and the rotor system 201, between the second-stage inlet partition 204 and the rotor system 201, between the aeration support partition 205 and the rotor system 201, and between at least part of the second-stage partition 206 and the rotor system 201. The stage partition 2023 is embedded in the inner casing in the form of a stopper, and together with the inner casing forms a gas channel.

[0047] Among them, the entire exhaust volute chamber 2012 is designed above a last-stage impeller and does not occupy the axial length space of the unit structure. In other words, the axial length is not increased, thereby ensuring the rigidity of the rotor system 201 and avoiding problems such as large vibration of the rotor system 201 or even inability to operate normally and smoothly.

[0048] Among them, the entire aeration volute 2014 is designed above the return flow inlet of the stage where the aeration volute 2014 is located, and does not occupy the axial length space of the unit structure. That is to say, the axial length is not increased, thereby ensuring the rigidity of the rotor system 201 and avoiding problems such as large vibration of the rotor system 201 or even inability to operate normally and smoothly.

[0049] Compared with the traditional integrally cast inner casing, the serially assembled inner casing structure not only solves the problems of large casting and complex volute structure, high casting cost, long casting cycle, etc., each volute chamber can be designed into a semi-open variable cross-section form according to needs, which is convenient for sand cleaning during casting to improve the casting quality of the volute chamber flow channel. After casting, the volute chamber can also be sandblasted, painted or even secondary machining to improve the dimensional accuracy and surface finish of the volute chamber flow channel, reduce the flow loss of the volute chamber, and improve the efficiency of the unit. Other flow and assembly planes are more convenient for machining, which helps to improve product processing quality and reduce processing difficulty and cost; the various partitions that make up the inner casing are matched with the positioning table and are processed by high-precision machine tools, so that the positioning dimensions between each volute chamber and each partition are more accurate, avoiding the dimensional positioning problems such as misalignment between each volute chamber and assembly parts caused by the expansion box and other reasons of the integral casting, which affects the assembly and operation of the unit.

[0050] In addition, the inner casing in the form of segmented casting and serial assembly can be arranged in different combinations according to the needs of the unit structure design. The partitions and components without volute chambers can also be machined from plates or forgings, room temperature or low temperature materials, ordinary carbon steel or special anti-corrosion stainless steel and other materials as needed, which improves the versatility of castings and the diversity and adaptability of material selection.

[0051] The stage partition 2023 related to the impeller basic stage can be selected and assembled according to the requirements of the pneumatic solution. The core 2 has strong versatility and is convenient for the standardized and rapid design of the unit structure. When the user adjusts the process on site, the basic stage of the impeller can be replaced by related parts for rapid assembly and transformation, which can minimize the time cost and economic cost of the transformation.

[0052] The first exhaust volute 2012 adopts a variable cross-section spiral structure, and the gas is discharged tangentially along the first exhaust volute 2012. The first exhaust volute 2012 adopting a variable cross-section spiral structure can make the flow velocity of the process gas in each cross section in the first exhaust volute 2012 more uniform, and reduce the flow loss in the first exhaust volute 2012.

[0053] The first exhaust volute 2012 includes a first chamber and a first exhaust hole, the first chamber is a variable cross-section spiral, the first exhaust hole is connected to the first chamber, and the first exhaust hole is arranged tangentially upward along the first chamber, and the first exhaust hole is used to achieve tangential upward exhaust. Here, the first exhaust hole adopts tangential exhaust, which is also conducive to reducing the flow loss in the first exhaust volute 2012 and improving the unit structure operation efficiency.

[0054] The aeration volute 2014 adopts a spiral structure of equal cross section with a baffle plate at the tail end or a spiral structure of variable cross section with a baffle plate at the tail end, and the air is tangentially introduced along the aeration volute 2014. The aeration volute 2014 adopting a spiral structure of variable cross section can make the flow velocity of the process gas in each cross section in the aeration volute 2014 more uniform, and reduce the flow loss in the aeration volute 2014.

[0055] The aerated volute 2014 includes an aerated chamber and a first air inlet, the first air inlet is connected to the aerated chamber, the purge air is introduced into the aerated chamber through the first air inlet, and the first air inlet is arranged tangentially upward along the aerated chamber, that is, the purge air enters the aerated chamber along the tangential direction. Here, the first air inlet adopts tangential air intake, which is also conducive to reducing the flow loss in the aerated volute 2014 and improving the unit structure operation efficiency.

[0056] When the flow rate of the vented air introduced into the aeration chamber is large, the aeration chamber adopts a variable cross-section spiral structure with a baffle at the tail end; otherwise, the aeration chamber adopts a constant cross-section spiral structure with a baffle at the tail end. The baffle is set in such a way that the airflow circulates in the aeration volute 2014, further improving the unit structure operation efficiency.

[0057] The rotation direction of the gas filling volute 2014 is consistent with the rotation direction of the compressor rotor, so that the gas filling is more uniform and the flow loss in the gas filling volute 2014 is further guaranteed.

[0058] An inlet volute 2011 is disposed on the end surface of the inlet partition 202, and the inlet volute 2011 and a section of the exhaust volute 2012 are arranged opposite to each other;

[0059] The first partition plate 203 also includes a second end surface, and the second inlet partition plate 204 is provided with a second inlet volute chamber 213 at the contact end with the second end surface;

[0060] A circulating air intake volute 2015 is provided at the contact end between the circulating section inlet partition 207 and the second section partition 206;

[0061] The end surface of the outlet baffle 208 is provided with a final exhaust volute 2016 which is connected to the circulating intake volute 2015 .

[0062] The air inlet volute 2011 adopts a variable cross-section spiral structure with a first diverter rib, and air is vertically inletted along the air inlet volute 2011. The air inlet volute 2011 with a variable cross-section spiral structure can make the flow velocity of the process gas in each cross section in the air inlet volute 2011 more uniform, reducing the flow loss in the air inlet volute 2011.

[0063] Among them, the air intake volute 2011 includes an air intake chamber and a second air intake hole, the second air intake hole is connected to the air intake chamber, and the second air intake hole is arranged directly below the air intake chamber to realize vertical air intake from below.

[0064] Specifically, the second air inlet hole is communicated with the largest cross-section of the air inlet chamber.

[0065] Among them, two first diversion ribs are arranged at opposite ends of the intake chamber, which have achieved the diversion of the process gas entering the intake volute chamber 2011, so that the process gas is evenly distributed in the intake volute chamber 2011, and the flow loss in the intake volute chamber 2011 is further reduced.

[0066] Specifically, the setting direction of the first diverter rib is the same as the axial direction of the second air inlet hole. The first diverter rib located at the end of the second air inlet hole extends to the outlet end of the second air inlet hole, so that the process gas is evenly distributed into the air inlet volute 2011 at the outlet end of the second air inlet hole.

[0067] The second-stage air intake volute 2013 adopts a variable-section spiral structure with a second flow dividing rib, and air is vertically inletted along the side of the second-stage air intake volute 2013. The second-stage air intake volute 2013 with a variable-section spiral structure can make the flow velocity of the process gas in each section in the second-stage air intake volute 2013 more uniform, and reduce the flow loss in the second-stage air intake volute 2013.

[0068] Among them, the second-stage air intake volute 2013 includes a second-stage air intake chamber and a third air intake hole. The third air intake hole is connected to the second-stage air intake chamber. The third air intake hole is arranged on the side of the second-stage air intake chamber, thereby realizing the lateral vertical air intake of the second-stage air intake volute 2013.

[0069] Specifically, the third air inlet hole is connected to the largest cross-section of the second-stage air inlet chamber.

[0070] Among them, two second diversion ribs are arranged at the opposite ends of the second-stage air intake chamber, which has realized the diversion of the process gas entering the second-stage air intake volute 2013, so that the process gas is evenly distributed in the second-stage air intake volute 2013, reducing the flow loss in the second-stage air intake volute 2013.

[0071] Specifically, the inclination direction of the second diverter rib is the same as the axial direction of the third air inlet hole. The second diverter rib located at the outlet end of the third air inlet hole extends into the outlet end of the third air inlet hole, so that the process gas is evenly distributed into the second-stage air inlet volute 2013 at the outlet end of the third air inlet hole.

[0072] The circulating air intake volute 2015 adopts a variable-section spiral structure with a third diverter rib, and air is vertically inlet along the circulating air intake volute 2015 .

[0073] Among them, the circulating air intake volute 2015 includes a circulating air intake chamber and a fourth air intake hole. The fourth air intake hole is connected to the circulating air intake chamber. The fourth air intake hole is arranged directly below the circulating air intake chamber to realize vertical air intake from below.

[0074] Specifically, the fourth air inlet hole is communicated with the largest cross-section of the circulating air inlet chamber.

[0075] The third diverter rib is arranged at the smallest cross section of the circulating air intake chamber, and the arrangement direction of the third diverter rib is the same as the axis direction of the fourth air intake hole. The arrangement of the third diverter rib further ensures the uniformity of the air supply and reduces the flow loss in the circulating air intake volute 2015.

[0076] The final exhaust volute 2016 adopts a variable-section spiral structure, and the gas is discharged tangentially along the final exhaust volute 2016 .

[0077] The final exhaust volute 2016 with a variable-section spiral structure can make the flow velocity of the process gas in each cross section in the final exhaust volute 2016 more uniform, thereby reducing the flow loss in the final exhaust volute 2016 .

[0078] The final exhaust volute 2016 includes a final exhaust chamber and a second exhaust hole, the final exhaust chamber is a variable cross-section spiral, the second exhaust hole is connected to the final exhaust chamber, and the second exhaust hole is arranged tangentially upward along the final exhaust chamber, and the second exhaust hole is used to achieve tangential upward exhaust. Here, the second exhaust hole adopts tangential exhaust, which is also conducive to reducing the flow loss in the final exhaust volute 2016 and improving the unit structure operation efficiency.

[0079] A second aspect of the present application provides a synthesis gas compressor for compressing methanol synthesis gas, comprising a casing 1, a thrust side end cover bearing area 3, a support side end cover bearing area 4 and a movement 2 according to any one of claims 1 to 9; the movement 2 is arranged in the casing 1, the air inlet end of the casing 1 is provided with the thrust side end cover bearing area 3, and the air outlet end of the casing 1 is provided with the support side end cover bearing area 4.

[0080] The thrust side end cover bearing area 3 is fastened to the air inlet end of the casing 1 by bolts, and similarly, the support side end cover bearing area 4 is fastened to the air outlet end of the casing 2 by bolts.

[0081] The support side end cover bearing area 4 includes a support side end cover, and the outlet partition plate 208 is fastened to the support side end cover by bolts.

[0082] Among them, the outer peripheral surface of the casing 1 is respectively provided with a first exhaust port 2017, a second air inlet 2018, an air filling port 2019, an air inlet 2020, a circulating air inlet 2021 and a final exhaust port 2022. The first exhaust port 2017 is connected to the first exhaust hole, the second air inlet 2018 is connected to the third air inlet, the air filling port 2019 is connected to the first air inlet, the air inlet 2020 is connected to the second air inlet, the circulating air inlet 2021 is connected to the fourth air inlet, and the final exhaust port 2022 is connected to the second exhaust hole.

[0083] An exhaust volute chamber 2012 in the movement 2 is radially arranged above a section of the terminal impeller; an air-filling volute chamber 2014 in the movement 2 is radially arranged above the return flow inlet of the stage where the air-filling volute chamber 2014 is located, thereby reducing the increase in the axial support span caused by the multi-volute chamber structure, and improving the unit structure operating efficiency and reducing the unit energy consumption without affecting the insufficient rigidity of the rotor system 201.

[0084] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0085] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A movement, characterized in that: include: A rotor system (201), wherein the outer circumferential surface of the rotor system (201) is sequentially provided with an inlet baffle (202), a first-stage baffle (203), a second-stage inlet baffle (204), an air-entraining support baffle (205), a second-stage baffle (206), a circulation-stage inlet baffle (207), and an outlet baffle (208); The first partition plate (203) comprises a first end surface, and the contact end of the inlet partition plate (202) and the first end surface is provided with an exhaust volute chamber (2012); The aeration support baffle (205) is provided with an aeration volute (2014); The exhaust volute (2012) is radially arranged above a last-stage impeller; the air-injection volute (2014) is radially arranged above a return flow device at the stage where the air-injection volute (2014) is located.

2. A movement according to claim 1, characterized in that: The exhaust volute chamber (2012) has a variable cross-section spiral structure, and gas is discharged tangentially along the exhaust volute chamber (2012).

3. A movement according to claim 1, characterized in that: The aerated volute (2014) adopts a spiral structure of equal cross-section with a spoiler plate provided at the tail end, or a spiral structure of variable cross-section with a spoiler plate provided at the tail end, and air is tangentially inletted along the aerated volute (2014).

4. A movement according to claim 3, characterized in that: The rotation direction of the aeration volute (2014) is consistent with the rotation direction of the compressor rotor.

5. A movement according to claim 1, characterized in that: An air intake volute (2011) is disposed on the end surface of the inlet partition plate (202), and the air intake volute (2011) and the first exhaust volute (2012) are arranged opposite to each other; The first-stage partition plate (203) further comprises a second end surface, and the second-stage inlet partition plate (204) is provided with a second-stage air intake volute (2013) at the contact end with the second end surface; A circulating air intake volute (2015) is provided at the contact end between the circulating section inlet baffle (207) and the second section baffle (206); The end surface of the outlet baffle (208) is provided with a final exhaust volute (2016) which is connected to the circulating intake volute (2015).

6. A movement according to claim 5, characterized in that: The air intake volute (2011) adopts a variable-section spiral structure with diverter ribs, and air is vertically inletted along the air intake volute (2011).

7. A movement according to claim 5, characterized in that: The second-stage air intake volute (2013) adopts a variable-section spiral structure with diverter ribs, and air is vertically inletted along the side of the second-stage air intake volute (2013).

8. A movement according to claim 5, characterized in that: The circulating air intake volute (2015) adopts a variable-section spiral structure with diverter ribs, and air is vertically inlet along the circulating air intake volute (2015).

9. A movement according to claim 5, characterized in that: The final exhaust volute (2016) adopts a variable-section spiral structure, and gas is discharged tangentially along the final exhaust volute (2016).

10. A synthesis gas compressor, characterized in that: It comprises a casing (1), a thrust side end cover bearing area (3), a support side end cover bearing area (4) and a movement (2) as claimed in any one of claims 1 to 9; the movement (2) is arranged in the casing (1), the thrust side end cover bearing area (3) is arranged at the air inlet end of the casing (1), and the support side end cover bearing area (4) is arranged at the air outlet end of the casing (1).

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