Novel compressor energy-saving device

Abstract

The utility model discloses a novel compressor energy-saving device, which relates to the technical field of oil refining and chemical engineering, and comprises an inlet liquid separation tank, a plurality of groups of interstage tanks connected to one side of the inlet liquid separation tank, and an outlet tank arranged on one side of the tail-end interstage tank, and after being condensed by the condensing agent, the liquid is conveyed out through the booster pump from the bottom of the lower interstage tank. In the utility model, the energy consumption of the part of self-circulation of the delivery liquid phase in the compressor is saved by optimizing the flow path of the interstage tank of the multi-stage supercharger in an energy-saving manner and changing the self-pressure into the form of pump boosting delivery, and the energy consumption of the compressor is not occupied any more by directly delivering the condensate to the subsequent flow path, so that the energy-saving effect is achieved; and the energy-saving effect is huge, the effect is obvious particularly when the booster pump is applied to a large-scale booster, and the pressure meter is arranged on one side of the booster pump, so that accurate pressure detection of the liquid phase sent out after pressurization is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil refining and chemical industry, in particular to a novel compressor energy-saving device. Background Art

[0002] In industrial applications, boosters are often used in oil refining and chemical plants. The condensate in the interstage tank of a multi-stage compressor is generally discharged through a self-pressurizing device. In particular, large multi-stage boosters such as centrifugal three-stage compressors are driven by a drag turbine. The condensate in the interstage tank flows back to the raw material tank, causing part of the booster's energy to be wasted, doing useless work for this part of the condensate, resulting in energy waste.

[0003] During the operation of a centrifugal three-stage compressor, if the condensate from the compressor interstage tank returns to the inlet tank V101, this part of the gas phase will continue to consume the compressor energy after reaching the gas-liquid phase equilibrium of V101, and increase the cooling load and flow resistance of each air cooling, resulting in increased energy loss. Since the bottom liquid phase of the interstage tank V103 is sent from the bottom of V101 to the subsequent distillation tower process, a part of the gas will definitely circulate in the compressor, causing energy loss. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings that if the condensate in the interstage tank of the existing compressor is returned to the inlet tank V101, this part of the gas phase will continue to consume the energy of the compressor after reaching the gas-liquid phase equilibrium of V101, and increase the cooling load and flow resistance of each air cooling, resulting in increased energy loss; if the bottom liquid phase of the interstage tank V103 is sent from the bottom of V101 to the subsequent distillation tower process, a part of the gas will definitely circulate in the compressor, causing energy loss, and a new compressor energy-saving device is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A new type of compressor energy-saving device includes an inlet separator tank, multiple groups of interstage tanks connected to one side of the inlet separator tank, and an outlet tank arranged on one side of the terminal interstage tank. The top gas phase inside the inlet separator tank enters the top gas phase of the interstage tank on one side to be compressed by the compressor C, and after being condensed by the condensing agent, it is sent out through the bottom of the lower group of interstage tanks by a booster pump.

[0007] As a further description of the above technical solution:

[0008] The plurality of groups of interstage tanks include a first interstage tank, a second interstage tank and a third interstage tank.

[0009] As a further description of the above technical solution:

[0010] The gas phase between each group of interstage tanks is compressed by the compressor C and condensed by the condensing agent before entering the next group of interstage tanks.

[0011] As a further description of the above technical solution:

[0012] The output end of the booster pump is connected to a pressure gauge through a tee, and one side of the pressure gauge is connected to the connecting pipe on the other side of the booster pump through a circulation pipe.

[0013] As a further description of the above technical solution:

[0014] The booster pump drives the liquid phase to increase pressure and then enters the next process after being detected by the pressure gauge. The liquid phase that does not meet the pressure requirements enters the booster pump again through the circulation pipe.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. In the utility model, by optimizing the energy saving of the interstage tank process of the multi-stage booster, by changing the self-pressure into the form of pump boosting and external delivery, the energy consumption of the external liquid phase in the self-circulation inside the compressor is saved, and by directly delivering the condensate to the back-end process, it will no longer occupy the energy consumption of the compressor, thereby playing a role in energy saving, and the energy saving effect is huge, especially when applied to large-scale boosters.

[0017] 2. In the present invention, by arranging a pressure gauge on one side of the booster pump, accurate pressure detection of the liquid phase sent out after the boosting is achieved, ensuring that the tower pressure in the distillation tower of the back-end process is qualified. By directly entering the distillation tower, there is no circulating gas, energy consumption is reduced, and practicality is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the existing compressor control process structure;

[0019] Figure 2 This is a schematic diagram of the process structure of a new type of compressor energy-saving device in the utility model;

[0020] Legend:

[0021] 1. Inlet separator tank; 2. First-stage interstage tank; 3. Second-stage interstage tank; 4. Third-stage interstage tank; 5. Outlet tank; 6. Compressor C; 7. Condensant; 8. Booster pump; 9. Pressure gauge; 10. Circulation pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1 In the prior art, large multi-stage boosters, such as centrifugal three-stage compressors, are usually driven by a drag turbine. The condensate in the interstage tank is generally returned to the first-stage inlet tank V101 by self-pressure. This part of the condensate will further absorb and release heat in V101 and partially vaporize before re-entering the compressor for compression. The specific process of this part is that the top gas phase of V101 enters the top gas phase of V102 to be compressed by the compressor, and after condensation, it is self-pressurized back to V101 by the bottom of V103. Since the condensate in the compressor interstage tank returns to the inlet tank V101, this part of the gas phase will continue to consume compressor energy after reaching gas-liquid phase equilibrium in V101, and increase the cooling load and flow resistance of each air cooling unit, resulting in increased energy loss, making part of the gas phase condensate do useless work, resulting in energy waste.

[0024] Reference Figure 2 A new type of compressor energy-saving device includes an inlet liquid separator 1, multiple groups of interstage tanks connected to one side of the inlet liquid separator 1, an outlet tank 5 arranged on one side of the terminal interstage tank, a first interstage tank 2, a second interstage tank 3, a third interstage tank 4, an outlet tank 5, a compressor C6, a condensing agent 7, a booster pump 8, a pressure gauge 9 and a circulation pipe 10. Taking into account the energy-saving optimization of the interstage tank process of the multi-stage booster, the top gas phase inside the inlet liquid separator 1 enters the top gas phase of the interstage tank on one side and is compressed by the compressor C6. After being condensed by the condensing agent 7, it is directly sent out through the bottom of the next group of interstage tanks by the booster pump 8. Through the setting of the booster pump 8, the condensate is directly sent to the back-end process and will no longer occupy the compressor C6. Energy consumption is reduced, so it plays an energy-saving role, and the energy-saving effect is huge, and the structure is simple and convenient, and the later maintenance cost is low. Further, considering the use between multiple groups of interstage tanks, specifically, the multiple groups of interstage tanks include a first interstage tank 2, a second interstage tank 3 and a third interstage tank 4, and the gas phase between each group of interstage tanks is compressed by the compressor C6, and enters the next group of interstage tanks after condensation by the condensing agent 7. At the same time, the liquid phase in the interstage tank is directly sent out to the back-end process through the booster pump 8 at the bottom. Specifically, the back-end process is generally a distillation tower cutting process. Since the booster pump 8 is used to directly send it to the subsequent distillation tower process from the bottom of the second interstage tank 3, there is no circulating gas, and energy consumption is reduced.

[0025] Furthermore, considering the accuracy of the subsequent entry of the liquid phase into the distillation tower, in actual work, the tower pressure of the distillation tower is generally about 0.9 MPa, and the pressure of the second-stage intertank 3 is generally 0.5 MPa. In order to achieve the pressure measurement effect, a pressure gauge 9 is connected to the output end of the booster pump 8 through a tee, and one side of the pressure gauge 9 is connected to the other side connecting pipe of the booster pump 8 through a circulation pipe 10. Through such a setting, the booster pump 8 drives the liquid phase to be pressurized and then enters the next process after being detected by the pressure gauge 9, so that the liquid phase that has not been pressurized enters the booster pump 8 again through the circulation pipe 10 for pressurization, ensuring the effect of the liquid phase entering the distillation tower and ensuring the quality of the subsequent process.

[0026] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A novel compressor energy-saving device, comprising an inlet liquid separator (1), a plurality of interstage tanks connected to one side of the inlet liquid separator (1), and an outlet tank (5) arranged on one side of the terminal interstage tank, characterized in that: The top gas phase inside the inlet separator tank (1) enters the top gas phase of the interstage tank on one side and is compressed by the compressor C (6). After being condensed by the condensing agent (7), it is sent out through the bottom of the lower group of interstage tanks by the booster pump (8).

2. A novel compressor energy-saving device according to claim 1, characterized in that: The plurality of groups of interstage tanks include a first interstage tank (2), a second interstage tank (3) and a third interstage tank (4).

3. A novel compressor energy-saving device according to claim 2, characterized in that: The gas phase between each group of interstage tanks is compressed by compressor C (6), condensed by condensing agent (7) and then enters the next group of interstage tanks.

4. A novel compressor energy-saving device according to claim 1, characterized in that: The output end of the booster pump (8) is connected to a pressure gauge (9) via a tee, and one side of the pressure gauge (9) is connected to the other side connecting pipe of the booster pump (8) via a circulation pipe (10).

5. A novel compressor energy-saving device according to claim 4, characterized in that: The booster pump (8) drives the liquid phase to increase pressure and then enters the next process after being detected by the pressure gauge (9). The liquid phase that does not meet the pressure requirements enters the booster pump (8) again through the circulation pipe (10).

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