Four-stage steam compressor for heat pump rectification

Abstract

The utility model discloses a four-stage steam compressor for heat pump rectification, which relates to the technical field of steam compressors and comprises a base, a motor, a PLC (programmable logic controller) control cabinet and a lubricating oil system, the motor is fixedly arranged on the right side of the upper end of the base, the PLC control cabinet is fixedly arranged on the right side of the rear end of the base, and the lubricating oil system is also mounted on the base. A speed-increasing gearbox is fixedly arranged in the middle of the upper side of the base and located on the left side of the motor, and the output end of the motor is connected with a driving shaft of the speed-increasing gearbox. The steam generator has the advantages that the steam pressure and temperature are increased, the number of compressor devices and matched devices can be reduced, and the purchase cost of the devices is reduced; the whole skid-mounted arrangement is adopted, the occupied area is small, the installation space is saved, the structure is compact and attractive, the needed plant area is small, and plant investment is low; the gas pipeline does not need to be rearranged on site, the equipment installation and debugging period is short, and pipeline arrangement and equipment repair and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of steam compressor technology, specifically a four-stage steam compressor for heat pump distillation. Background Technology

[0002] The overall structure of a steam compressor is relatively complex, mainly consisting of three basic units: a compression system, a steam cooler, and a lubrication system. The steam compressor is a key device in the heat recovery system that increases the temperature and pressure of the generated steam through compression. Its function is to pressurize and heat low-pressure (or low-temperature) steam to meet the temperature and pressure requirements of the process or project.

[0003] Currently, the steam compressors used in heat pump distillation systems in China are mainly single-stage and two-stage compressors. If a high pressure ratio and high pressure rise are required, multiple units need to be used in series. However, using multiple units in series has disadvantages such as larger footprint, higher equipment investment cost, and more complex pipeline layout and maintenance. Therefore, we propose a four-stage steam compressor for heat pump distillation. Utility Model Content

[0004] The purpose of this invention is to provide a four-stage steam compressor for heat pump distillation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a four-stage steam compressor for heat pump distillation, comprising a base, a motor, a PLC control cabinet, and a lubrication system. The motor is fixedly mounted on the upper right side of the base, the PLC control cabinet is fixedly mounted on the rear right side of the base, and the lubrication system is also mounted on the base. A speed increaser is fixedly mounted in the upper middle part of the base, located to the left of the motor, and the output end of the motor is connected to the drive shaft of the speed increaser. A first-stage compressor pump head, a second-stage compressor pump head, a third-stage compressor pump head, and a fourth-stage compressor pump head are mounted on both sides of the speed increaser. The first-stage compressor pump head... The first and second stage compressor pump heads are located on the left side of the gearbox, while the third and fourth stage compressor pump heads are located on the right side. The first and second stage compressor pump heads are interconnected via interstage pipes, the second and third stage compressor pump heads are interconnected via interstage pipes, and the third and fourth stage compressor pump heads are interconnected via interstage pipes. Each of the first, second, and third stage compressor pump heads has a set of vertically distributed primary spray nozzles installed on its volute. The fourth stage compressor pump head has a final stage outlet spray nozzle installed on its volute.

[0006] As a further embodiment of this utility model: a plurality of low-level drainage devices are fixedly installed on the lower left side of the base, and the plurality of low-level drainage devices are respectively connected to the input ends of the secondary compressor pump head, the tertiary compressor pump head and the quaternary compressor pump head.

[0007] As a further aspect of this utility model, each of the primary spraying device and the final outlet spraying device is equipped with a temperature detection device.

[0008] As a further embodiment of this utility model, pressure detection devices are installed at the input ends of the secondary compressor pump head, the tertiary compressor pump head, and the quaternary compressor pump head.

[0009] As a further embodiment of this utility model: interstage expansion joints are installed on the first and second stage interstage pipes, the second and third stage interstage pipes, and the third and fourth stage interstage pipes.

[0010] As a further embodiment of this utility model: a first- and second-stage sealed air pipe assembly is installed at the air inlet of the first-stage compressor pump head and the second-stage compressor pump head, and a third- and fourth-stage sealed air pipe assembly is installed at the air inlet of the third-stage compressor pump head and the fourth-stage compressor pump head, and both are equipped with a shut-off valve and a pressure gauge.

[0011] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows:

[0012] 1. This utility model improves steam pressure and temperature, which can reduce the number of compressor equipment and accessories, and reduce equipment procurement costs; the overall skid-mounted layout has a small footprint, saves installation space, has a compact and beautiful structure, requires a small factory area, and has low factory investment; there is no need to rearrange gas pipelines on site, and the equipment installation and commissioning cycle is short.

[0013] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure in an embodiment of the present utility model;

[0015] Figure 2 This is a top view of the structure in an embodiment of the present invention.

[0016] In the diagram: 1. Speed ​​increaser; 2. Three-stage compressor pump head; 3. Four-stage compressor pump head; 4. Primary liquid injection device; 5. Two-stage compressor pump head; 6. First-stage compressor pump head; 7. Interstage piping between first and second stages; 8. Low-level drain device; 9. Temperature detection device; 10. Pressure detection device; 11. First and second-stage sealed gas pipe assembly; 12. Interstage expansion joint; 13. Interstage piping between third and fourth stages; 14. Final stage outlet liquid injection device; 15. Interstage sealed gas pipe assembly between third and fourth stages; 16. Interstage piping between second and third stages; 17. Lubricating oil system; 18. Motor; 19. PLC control cabinet. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0018] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] Please see the appendix Figure 1 -Appendix Figure 2This utility model discloses a four-stage steam compressor for heat pump distillation, comprising a base, a motor 18, a PLC control cabinet 19, and a lubrication system 17. The motor 18 is fixedly mounted on the upper right side of the base, and the PLC control cabinet 19 is fixedly mounted on the rear right side of the base. The lubrication system 17 is also mounted on the base. A speed increaser 1 is fixedly mounted on the upper center of the base, located to the left of the motor 18, and the output end of the motor 18 is connected to the drive shaft of the speed increaser 1. A first-stage compressor pump head 6, a second-stage compressor pump head 5, a third-stage compressor pump head 2, and a fourth-stage compressor pump head 3 are mounted on both sides of the speed increaser 1. Each of these pump heads includes a volute, a connecting flange, a diffuser, a carbon ring seal, an impeller, a tie rod, a lock nut, and a guide head. The first-stage compressor pump head 6 and the third-stage compressor pump head 2 are located to the left of the speed increaser 1. The first-stage compressor pump head 6 and the second-stage compressor pump head 5 are located on the right side of the gearbox 1. The first-stage compressor pump head 6 and the second-stage compressor pump head 5 are connected to each other through the first-stage and second-stage interstage pipe 7. The second-stage compressor pump head 5 and the third-stage compressor pump head 2 are connected to each other through the second-stage and third-stage interstage pipe 16. The third-stage compressor pump head 2 and the fourth-stage compressor pump head 3 are connected to each other through the third-stage and fourth-stage interstage pipe 13. Each of the first-stage compressor pump head 6, the second-stage compressor pump head 5 and the third-stage compressor pump head 2 has a set of vertically distributed primary liquid injection devices 4 installed on its volute. These devices are mainly used to cool the superheated steam after the first-stage compression. The three sets of primary liquid injection devices 4 are used to cool the superheated steam after the first-stage compression, the second-stage compression and the third-stage compression, respectively, to prepare for entering the next stage of compression. The fourth-stage compressor pump head 3 has a final-stage outlet liquid injection device 14 installed on its volute. This device is mainly used to cool the superheated steam after the fourth-stage compression and to provide saturated steam for integration into the heat pump distillation system.

[0020] In one embodiment of this utility model: a plurality of low-level drainage devices 8 are fixedly installed at the lower left end of the base. The plurality of low-level drainage devices 8 are respectively connected to the input ends of the secondary compressor pump head 5, the tertiary compressor pump head 2 and the quaternary compressor pump head 3 to prevent unvaporized liquid from entering the secondary compressor pump head 5, the tertiary compressor pump head 2 and the quaternary compressor pump head 3.

[0021] In one embodiment of this utility model: a temperature detection device 9 is installed on each primary spraying device 4 and the final outlet spraying device 14, which can adjust the spraying device according to the output temperature.

[0022] In one embodiment of this utility model: a pressure detection device 10 is installed at the input end of the secondary compressor pump head 5, the tertiary compressor pump head 2, and the quaternary compressor pump head 3 to detect the pressure entering the secondary compressor pump head 5, the tertiary compressor pump head 2, and the quaternary compressor pump head 3.

[0023] In one embodiment of this utility model, interstage expansion joints 12 are installed on the first and second stage interstage pipes 7, the second and third stage interstage pipes 16, and the third and fourth stage interstage pipes 13 to eliminate the adverse effects of thermal expansion and contraction and vibration on the compressor during equipment operation.

[0024] In one embodiment of this utility model: a first- and second-stage sealing gas pipe assembly 11 is installed at the air inlet of the first-stage compressor pump head 6 and the second-stage compressor pump head 5, along with a shut-off valve and a pressure gauge, to control the sealing gas pressure of the graphite seal to be slightly higher than the pressure of the first- and second-stage compression system, ensuring that water vapor does not leak out while also reducing the consumption of sealing gas. A third- and fourth-stage sealing gas pipe assembly 15 is installed at the air inlet of the third-stage compressor pump head 2 and the fourth-stage compressor pump head 3, along with a shut-off valve and a pressure gauge, to control the sealing gas pressure of the carbon ring seal to be slightly higher than the pressure of the third- and fourth-stage compression system, ensuring that water vapor does not leak out while also reducing the consumption of sealing gas.

[0025] The lubrication system 17 includes an oil tank, main oil pump, auxiliary oil pump, oil cooler, oil filter, and pipeline valves, etc.

[0026] Working principle:

[0027] This invention improves steam pressure and temperature, reducing the number of compressor equipment and accessories, thus lowering equipment procurement costs; the overall skid-mounted layout occupies a small area, saving installation space, and has a compact and aesthetically pleasing structure, requiring less factory space and lowering factory investment; there is no need to rearrange gas pipelines on site, the equipment installation and commissioning cycle is short, and it facilitates pipeline layout and equipment maintenance.

[0028] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0030] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0031] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0033] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A four-stage steam compressor for heat pump distillation, comprising a base, a motor (18), a PLC control cabinet (19), and a lubrication system (17), characterized in that: The motor (18) is fixedly mounted on the upper right side of the base, the PLC control cabinet (19) is fixedly mounted on the rear right side of the base, the lubrication system (17) is also mounted on the base, and a speed increaser (1) is fixedly mounted on the upper middle part of the base. The speed increaser (1) is located to the left of the motor (18), and the output end of the motor (18) is connected to the drive shaft of the speed increaser (1). A first-stage compressor pump head (6), a second-stage compressor pump head (5), a third-stage compressor pump head (2), and a fourth-stage compressor pump head (3) are mounted on both sides of the speed increaser (1). The first-stage compressor pump head (6) and the third-stage compressor pump head (2) are located to the left of the speed increaser (1), and the second-stage compressor pump head (5) and the fourth-stage compressor pump head (3) are located to the left of the speed increaser (1). The compressor pump head (3) is located on the right side of the speed increaser (1). The first-stage compressor pump head (6) and the second-stage compressor pump head (5) are connected to each other through the first-stage and second-stage interstage pipes (7). The second-stage compressor pump head (5) and the third-stage compressor pump head (2) are connected to each other through the second-stage and third-stage interstage pipes (16). The third-stage compressor pump head (2) and the fourth-stage compressor pump head (3) are connected to each other through the third-stage and fourth-stage interstage pipes (13). A set of vertically distributed primary liquid spraying devices (4) are installed on the volutes of the first-stage compressor pump head (6), the second-stage compressor pump head (5) and the third-stage compressor pump head (2). The fourth-stage compressor pump head (3) is equipped with a final-stage outlet liquid spraying device (14).

2. A four-stage steam compressor for heat pump distillation according to claim 1, characterized in that: Multiple low-level drainage devices (8) are fixedly installed on the lower left side of the base. The multiple low-level drainage devices (8) are respectively connected to the input ends of the secondary compressor pump head (5), the tertiary compressor pump head (2) and the quaternary compressor pump head (3).

3. A four-stage steam compressor for heat pump distillation according to claim 2, characterized in that: Each of the primary spraying device (4) and the final outlet spraying device (14) is equipped with a temperature detection device (9).

4. A four-stage steam compressor for heat pump distillation according to claim 1, characterized in that: Pressure detection devices (10) are installed at the input ends of the secondary compressor pump head (5), the tertiary compressor pump head (2), and the quaternary compressor pump head (3).

5. A four-stage steam compressor for heat pump distillation according to claim 1, characterized in that: Interstage expansion joints (12) are installed on the first and second stage interstage pipes (7), the second and third stage interstage pipes (16), and the third and fourth stage interstage pipes (13).

6. A four-stage steam compressor for heat pump distillation according to claim 1, characterized in that: The first-stage compressor pump head (6) and the second-stage compressor pump head (5) are equipped with a first-stage and second-stage sealed air pipe assembly (11) at their air inlets, and the third-stage and fourth-stage sealed air pipe assemblies (15) are equipped with a third-stage and fourth-stage sealed air pipe assembly (15) at their air inlets. All of them are also equipped with a shut-off valve and a pressure gauge.

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