Propylene compressor unit heat recovery system
By adding working fluid heat exchanger and turbine to the heat recovery system of the propylene compressor unit, the working fluid absorbs the heat of propylene gas and drives the generator, the problem of rapid cooling of high-temperature propylene gas is solved, the cooling efficiency is improved and the consumption of cooling water is reduced.
Patent Information
- Application Number
- CN202421720370.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The prior art is difficult to achieve rapid cooling when cooling high-temperature propylene gas to 36°C, resulting in the cooler consuming a large amount of cooling water and inefficient efficiency.
A heat recovery system for a propylene compressor unit is designed. By adding a spiral coil-shaped working fluid heat exchanger to the pipeline at the outlet of the propylene compressor, the liquid working fluid absorbs the heat of the propylene gas, and drives the generator to generate electricity through the working fluid turbine. Then, the temperature of the working fluid is reduced and recycled, and the circulation is input into the working fluid heat exchanger for circulating heat exchange.
It realizes rapid auxiliary cooling of propylene gas when it is large and flow rate is high, alleviating the problem that the propylene cooler is difficult to completely and quickly cool, improving cooling efficiency and reducing cooling water consumption.
Smart Images
Figure CN222949930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat recovery, in particular to a heat recovery system for a propylene compressor unit. Background Art
[0002] Refrigeration stations often use steam turbines to drive centrifugal compressors to compress, condense, throttle, reduce pressure and evaporate propylene as a medium to achieve a refrigeration effect and provide cold capacity to each propylene cooler in the low-temperature methanol washing device.
[0003] The propylene from the low-temperature methanol washing device with a temperature of -33°C and a pressure of 0.05MPa is pressurized and compressed by a centrifugal compressor to increase the pressure of the propylene gas to 105°C and 1.7MPa. At this time, the high-temperature propylene gas will pass through the propylene cooler and propylene condenser. The propylene gas will be condensed into liquid propylene in the propylene condenser and will eventually be cooled to 36°C and stored in a propylene intermediate tank through a pipeline. The intermediate tank can send the liquid propylene to the low-temperature methanol washing device through a liquid level regulating valve to provide cooling to the low-temperature methanol washing device. The vaporized propylene gas enters the compressor inlet again for recycling.
[0004] However, the process of reducing the temperature of propylene gas from 105°C to 36°C not only requires a large amount of cooling water to pass through the propylene cooler and propylene condenser to cool the propylene gas, but also it is difficult to achieve rapid cooling of the propylene gas when the gas volume of the propylene gas is large and the flow rate is high. Utility Model Content
[0005] The utility model provides a heat recovery system for a propylene compressor unit, which can assist a propylene cooler to quickly cool high-temperature and high-flow-rate propylene gas.
[0006] The utility model provides a heat recovery system for a propylene compressor unit, comprising: a working fluid heat exchanger, a working fluid turbine, a working fluid recovery tank, and a working fluid delivery pump. The working fluid heat exchanger is in the shape of a spiral coil, which is arranged on a pipeline between an air outlet of a propylene compressor and an air inlet of a propylene cooler. The liquid working fluid filled inside absorbs the heat of propylene gas. The inlet end of the working fluid turbine is connected with the outlet end of the working fluid heat exchanger through a first through pipe, the inlet end of the working fluid recovery tank is connected with the outlet end of the working fluid turbine through a second through pipe, the outlet end of the working fluid recovery tank is connected with the inlet end of the working fluid heat exchanger through a third through pipe, and the working fluid delivery pump is connected to the second through pipe and is used for pressurizing and delivering the liquid working fluid cooled in the working fluid recovery tank to the working fluid heat exchanger.
[0007] Preferably, a fourth through pipe is connected in parallel on the pipeline, and both ends of the fourth through pipe are respectively located on both sides of the working fluid heat exchanger. The fourth through pipe is connected to a first control valve, and the pipeline is connected to second control valves on both sides of the working fluid heat exchanger, and the two second control valves are both located between the two ends of the fourth through pipe.
[0008] Preferably, the third through pipe and the first through pipe at positions adjacent to the working medium heat exchanger are both connected with a third control valve for controlling the flow of the working medium in the third through pipe and the first through pipe.
[0009] Preferably, a discharge port is provided at the bottom of the recovery tank near the working medium inlet end, and the discharge port is connected to a discharge pump, and a liquid filling port is provided at the upper end of the recovery tank away from the discharge port, and a sealing cover is provided at the liquid filling port.
[0010] Preferably, a cooling component for reducing the temperature of the working medium is provided on the second through pipe.
[0011] Preferably, the cooling component comprises a jacket, the sealing sleeve is arranged on the second through pipe, and the jacket is filled with cooling liquid.
[0012] Preferably, the working medium heat exchanger and the second through pipe are both made of metallic copper.
[0013] Compared with the prior art, the beneficial effect of the utility model is that: by adding a working fluid heat exchanger to the pipeline at the outlet of the propylene compressor, the device can quickly assist in cooling the propylene gas when the gas volume of the propylene gas is large and the flow rate is high, so as to ensure that the high-temperature propylene gas can be further reduced, thereby alleviating the problem that the propylene cooler is difficult to completely and quickly cool due to the large gas volume. Specifically, the device uses the working fluid heat exchanger to absorb the heat of the high-temperature propylene gas compressed by the propylene compressor. At the same time, the volume of the working fluid expands and the pressure rises after the temperature is increased. The high-temperature and high-pressure working fluid enters the working fluid turbine to drive the generator to generate electricity, and the temperature of the working fluid is reduced and recovered through the working fluid recovery tank to further cool the working fluid. Through the provided working fluid delivery pump, the working fluid cooled in the working fluid recovery tank can be circulated through the third through pipe and input into the working fluid heat exchanger to circulate the heat of the propylene gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A structural flow chart of a first embodiment of a cooling component of a heat recovery system of a propylene compressor unit provided by the utility model;
[0015] Figure 2 A structural flow chart of a second embodiment of a cooling component of a heat recovery system of a propylene compressor unit provided by the utility model;
[0016] Figure 3A schematic diagram of the internal structure of a working fluid recovery tank in a heat recovery system of a propylene compressor unit provided in an embodiment of the utility model.
[0017] Description of reference numerals:
[0018] 1. Propylene compressor; 2. Propylene cooler; 3. Propylene condenser; 4. Working fluid heat exchanger; 5. Working fluid turbine; 6. Working fluid recovery tank; 7. Working fluid delivery pump; 8. First through pipe; 9. Second through pipe; 10. Third through pipe; 11. Fourth through pipe; 12. First control valve; 13. Second control valve; 14. Third control valve; 15. Cooling component. DETAILED DESCRIPTION
[0019] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.
[0020] In the description of the present invention, 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution of 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 a limitation on the present invention.
[0021] refer to Figure 1 The utility model provides a heat recovery system for a propylene compressor, comprising: a working fluid heat exchanger 4, a working fluid turbine 5, a working fluid recovery tank 6, and a working fluid delivery pump 7. The working fluid heat exchanger 4 is in the shape of a spiral coil, which is arranged on the pipeline between the air outlet of the propylene compressor 1 and the air inlet of the propylene cooler 2. The liquid working fluid filled inside absorbs the heat of the propylene gas. The inlet end of the working fluid turbine 5 is connected to the outlet end of the working fluid heat exchanger 4 through a first through pipe 8, the inlet end of the working fluid recovery tank 6 is connected to the outlet end of the working fluid turbine 5 through a second through pipe 9, and the outlet end of the working fluid recovery tank 6 is connected to the inlet end of the working fluid heat exchanger 4 through a third through pipe 10. The working fluid delivery pump 7 is connected to the second through pipe 9, and is used for pressurizing and delivering the liquid working fluid cooled in the working fluid recovery tank 6 to the working fluid heat exchanger.
[0022] In the above embodiments, the device adds a working fluid heat exchanger 4 to the pipeline at the outlet of the propylene compressor 1, which can quickly assist in cooling the propylene gas when the gas volume of the propylene gas is large and the flow rate is high, so as to ensure that the high-temperature propylene gas can be further reduced, thereby alleviating the problem that the propylene cooler 2 is difficult to completely and quickly cool due to the large gas volume. Specifically, the device uses the working fluid heat exchanger 4 to absorb the heat of the high-temperature propylene gas compressed by the propylene compressor 1. At the same time, the volume of the working fluid expands and the pressure rises after the temperature is increased. The high-temperature and high-pressure working fluid enters the working fluid turbine 5 to drive the generator to generate electricity, and the temperature of the working fluid is reduced and recovered through the working fluid recovery tank 6 to further cool the working fluid. Through the provided working fluid delivery pump 7, the working fluid cooled in the working fluid recovery tank 6 can be circulated through the third through pipe 10 and input into the working fluid heat exchanger 4 to circulate the heat of the propylene gas.
[0023] Further, refer to Figure 1 Considering that when the propylene compressor 1 is initially running, the temperature of the propylene gas will not be too high and the flow rate will not be too large. If it passes through the working fluid heat exchanger 4, it may cause temperature discomfort. Therefore, the present device provides a first embodiment, a fourth through pipe 11 is connected in parallel on the pipeline, and the two ends of the fourth through pipe 11 are respectively located on both sides of the working fluid heat exchanger 4. The fourth through pipe 11 is connected with a first control valve 12, and the pipeline is located on both sides of the working fluid heat exchanger 4. Both second control valves 13 are connected, and the two second control valves 13 are located between the two ends of the fourth through pipe 11.
[0024] In the above embodiment, the opening of the first control valve 12 and the closing of the two fourth control valves are used to guide the propylene gas to the fourth through pipe 11, thereby avoiding the heat exchange effect of the working fluid heat exchanger 4, so that the propylene gas with a moderate flow rate that can be cooled by the propylene cooler 2 will not be further reduced in temperature by the working fluid heat exchanger 4.
[0025] Further, refer to Figure 1 In the second embodiment, a third control valve 14 is provided to connect the third through pipe 10 and the first through pipe 8 at a position adjacent to the working medium heat exchanger 4 , so as to control the flow rate of the working medium in the third through pipe 10 and the first through pipe 8 .
[0026] In the above embodiments, the propylene gas with a moderate flow rate that can be cooled by the propylene cooler 2 will not be further cooled by the working medium heat exchanger 4 .
[0027] Further, refer to Figure 3 A discharge port is provided at the bottom of the recovery tank near the working medium inlet end, and the discharge port is connected to a discharge pump. A liquid filling port is provided at the upper end of the recovery tank away from the discharge port, and a sealing cover is provided at the liquid filling port.
[0028] In the above embodiments, by providing a discharge port and a liquid filling port in the working fluid recovery tank 6, when the overall working fluid temperature in the working fluid recovery tank 6 is high, the working fluid with a lower temperature can be discharged externally and refilled through the liquid filling port to ensure that the working fluid temperature delivered to the working fluid heat exchanger 4 is low.
[0029] Further, refer to Figure 1 A cooling component 15 for reducing the temperature of the working medium is provided on the second through pipe 9.
[0030] Further, refer to Figure 1 The first embodiment of the cooling component 15 can be a jacket, the sealing sleeve is arranged on the second through pipe 9, and the jacket is filled with cooling liquid, such as Figure 2 As shown, the second embodiment can also be a working fluid cooler that is the same as the propylene cooler 2 and is implemented by water circulation.
[0031] In the above embodiments, specifically, the jacket can be sealed and clamped on the second through pipe 9, and the coolant can be water. The jacket is conventionally provided with a water inlet and a water outlet, and the temperature of the coolant can be continuously cooled by water circulation. The sensor component can also be other cooling devices. In this device, a working fluid cooler is preferably used, which can cool the working fluid, condense it, and transport it to the working fluid recovery tank 6 to achieve a recovery effect.
[0032] Further, refer to Figure 1 The working medium heat exchanger 4 and the second through pipe 9 are both made of metal copper.
[0033] In the above embodiments, copper material is selected, which has better thermal conductivity and low price, and can improve the heat exchange effect.
[0034] Usage and working principle: The propylene gas discharged from the outlet of the propylene compressor 1 to the pipeline will flow through the working fluid heat exchanger 4. The working fluid will be delivered to the working fluid heat exchanger 4 through the working fluid delivery pump 7 to achieve heat exchange with the high-temperature propylene gas in the pipeline. After the working fluid absorbs the heat of the propylene gas through heat exchange, its temperature becomes higher and its volume expands. It enters the working fluid turbine 5 through the first through pipe 8 to perform work. The working fluid turbine 5 drives the generator to generate electricity. After the work is completed, the working fluid with a lower temperature passes through the cooling component 15 to achieve cooling and condensation. After the working fluid is condensed, its volume shrinks and liquefies, and it is finally recovered to the working fluid recovery tank 6 through the second through pipe 9.
[0035] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A heat recovery system for a propylene compressor (1), characterized in that: include: The working medium heat exchanger (4) is in the shape of a spiral coil and is arranged on the pipeline between the air outlet of the propylene compressor (1) and the air inlet of the propylene cooler (2). The liquid working medium filled inside absorbs the heat of the propylene gas. The inlet end of the working fluid turbine (5) is connected to the outlet end of the working fluid heat exchanger (4) through a first through pipe (8); A working fluid recovery tank (6), the inlet end of which is connected to the outlet end of the working fluid turbine (5) via a second through pipe (9), and the outlet end of the working fluid recovery tank (6) is connected to the inlet end of the working fluid heat exchanger (4) via a third through pipe (10); A working fluid delivery pump (7) is connected to the second through pipe (9) and is used to pressurize and deliver the liquid working fluid after cooling in the working fluid recovery tank (6) to the working fluid heat exchanger (4).
2. A heat recovery system for a propylene compressor (1) group according to claim 1, characterized in that: The pipeline is connected in parallel with a fourth through pipe (11), the two ends of the fourth through pipe (11) are respectively located on both sides of the working fluid heat exchanger (4), the fourth through pipe (11) is connected with a first control valve (12), the pipeline is connected with a second control valve (13) on both sides of the working fluid heat exchanger (4), and the two second control valves (13) are both located between the two ends of the fourth through pipe (11).
3. A heat recovery system for a propylene compressor (1) group according to claim 1, characterized in that: The third through pipe (10) and the first through pipe (8) are both connected to a third control valve (14) at a position adjacent to the working medium heat exchanger (4) for controlling the flow of the working medium in the third through pipe (10) and the first through pipe (8).
4. A heat recovery system for a propylene compressor (1) group according to claim 1, characterized in that: The bottom of the recovery tank near the working medium inlet end is provided with a discharge port, and the discharge port is connected to a discharge pump. The upper end of the recovery tank away from the discharge port is provided with a liquid filling port, and the liquid filling port is equipped with a blocking cover.
5. A heat recovery system for a propylene compressor (1) group according to claim 4, characterized in that: The second through pipe (9) is provided with a cooling component (15) for reducing the temperature of the working medium.
6. A heat recovery system for a propylene compressor (1) group according to claim 5, characterized in that: The material of the working medium heat exchanger (4) is metallic copper.