An intelligent control system for high-efficiency waste heat recovery type water vapor compressor cooling and water supply

Abstract

The utility model relates to the technical field of energy saving and environmental protection, concretely relates to a kind of efficient waste heat recovery type water vapor compressor cooling water supply intelligent control system, including steam booster system, water supply system, lubricating oil cooling system and waste heat recovery system.Steam booster system includes water vapor compressor.Water supply system includes water supply pipeline.Lubricating oil cooling system includes oil pump and oil tank.Waste heat recovery system includes heat exchanger and waste heat source heat pump.Water supply pipeline is connected after the heat absorption end of heat exchanger and / or the heat absorption end of waste heat source heat pump with the water supply port of water vapor compressor.Water vapor compressor's oil return port, oil pump, oil tank and water vapor compressor's oil inlet are connected and form lubricating oil circulation passage.The efficient waste heat recovery type water vapor compressor cooling water supply intelligent control system is overall optimized traditional scheme from technical performance, economic value, application adaptation dimension, and it fits the current energy saving and emission reduction and high reliability operation industrial demand.

Description

Technical Field

[0001] This utility model relates to the field of energy conservation and environmental protection technology, specifically to an intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor. Background Technology

[0002] The demand for improved energy efficiency, waste heat recovery, and operational stability in industrial equipment continues to increase. As a core power equipment, the performance of the cooling and water supply system of steam compressors has become a key factor restricting the energy efficiency and reliability of the entire machine.

[0003] Currently, the cooling and water replenishment processes of steam compressors mainly rely on two types of technical solutions. For cooling, the primary approach is a forced air-cooling structure with an external fan. An axial fan blows air through the lubricating oil pipeline, controlling oil temperature through convection cooling. This solution is widely used in medium- and low-load steam compressors due to its simple structure. Some improved solutions add a plate heat exchanger to the air-cooling system, transferring waste heat from the lubricating oil to the cold water channel, achieving single-path waste heat recovery. For water replenishment, existing systems directly use ambient temperature water as the replenishment source, injecting it into the compressor's water circuit through pipelines, relying on the unit's own heating module to raise the temperature to the required operating temperature.

[0004] However, existing technologies have several specific drawbacks. In cooling systems, forced air cooling requires the continuous operation of high-power fans, and the heat released from lubricating oil cooling is directly discharged, resulting in low waste heat recovery rates and failing to meet energy-saving requirements. Furthermore, under high-temperature environments, the heat dissipation efficiency of air cooling decreases significantly, making it impossible to stabilize the lubricating oil temperature within a safe range.

[0005] These shortcomings lead to significant adverse consequences. Users bear higher energy consumption and maintenance costs. At the industry level, the energy efficiency of existing systems is insufficient to meet user requirements, and waste heat and additional energy consumption hinder the progress of dual-carbon goals in the industrial sector.

[0006] Therefore, there is an urgent need for better technical solutions to address issues such as high cooling energy consumption, insufficient waste heat utilization, and large temperature differences in water replenishment, in order to meet the dual requirements of high reliability and low energy consumption of current industrial equipment. Utility Model Content

[0007] To overcome the shortcomings of existing technologies, this application provides a high-efficiency waste heat recovery type intelligent control system for cooling water replenishment of steam compressors. This high-efficiency waste heat recovery type intelligent control system for cooling water replenishment of steam compressors comprehensively optimizes traditional solutions in terms of technical performance, economic value, and application adaptability, meeting the current industrial needs for energy conservation, emission reduction, and high-reliability operation, and has broad application value in steam circulation systems in the chemical, energy, and environmental protection fields.

[0008] To achieve the above objectives, this utility model provides an intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery steam compressor.

[0009] The high-efficiency waste heat recovery type intelligent control system for cooling water supply of a steam compressor includes a steam booster system, a water supply system, a lubricating oil cooling system, and a waste heat recovery system. The steam booster system includes a steam compressor. The water supply system includes a water supply pipeline. The lubricating oil cooling system includes an oil pump and an oil tank. The waste heat recovery system includes a heat exchanger and a waste heat source heat pump. The water supply pipeline connects to the water supply port of the steam compressor after passing through the heat absorption end of the heat exchanger and / or the heat absorption end of the waste heat source heat pump. The oil return port of the steam compressor, the oil pump, the oil tank, and the oil inlet of the steam compressor are connected to form a lubricating oil circulation path, which is further equipped with the heat release end of the heat exchanger and / or the heat release end of the waste heat source heat pump.

[0010] Preferably, the oil pump is a variable frequency gear pump.

[0011] Preferably, the intelligent control system for cooling water replenishment of the high-efficiency waste heat recovery type steam compressor further includes an intelligent control system, which includes an intelligent controller. The intelligent controller is connected to the steam boosting system, the water replenishment system, the lubricating oil cooling system, and / or the waste heat recovery system, respectively.

[0012] Preferably, the intelligent control system further includes a first temperature sensor and a second temperature sensor connected to the intelligent controller. The first temperature sensor is located near the outlet of the heat exchanger's heat dissipation end, and the second temperature sensor is located near the oil inlet of the steam compressor.

[0013] Preferably, a pressure sensor is further provided in the lubricating oil circulation path, and the pressure sensor is connected to the intelligent controller.

[0014] Preferably, a flow regulating valve is further provided in the lubricating oil circulation passage, and the flow regulating valve is connected to the intelligent controller.

[0015] Preferably, the fuel tank is equipped with an electric heating element, which is connected to the intelligent controller.

[0016] Preferably, a lubricating oil filter is further provided in the lubricating oil circulation passage.

[0017] Preferably, the waste heat recovery system further includes an electric three-way regulating valve, wherein the outlet of the heat exchanger's heat absorption end is connected to the inlet of the electric three-way regulating valve, the inlet of the waste heat source heat pump's heat absorption end is connected to the outlet of the electric three-way regulating valve, and the water supply port of the steam compressor is connected to the other outlet of the electric three-way regulating valve.

[0018] Preferably, the electric three-way regulating valve is an electric three-way regulating valve in which the valve core opening of the three ports can be adjusted independently.

[0019] Compared with the prior art, the beneficial effects of this application are as follows: Firstly, the high-efficiency waste heat recovery type steam compressor cooling water replenishment intelligent control system completely replaces the traditional external forced air cooling through a two-stage waste heat recovery architecture consisting of a heat exchanger and a waste heat source heat pump. This precisely addresses the shortcomings of the prior art, such as high energy consumption and heat dissipation degradation under high-temperature conditions, directly reducing energy costs. Simultaneously, it increases the lubricating oil waste heat recovery rate from a relatively low level in existing technologies to a higher level, avoiding heat waste. This architecture is unaffected by ambient temperature and can maintain stable cooling even under high-temperature conditions, avoiding the risk of lubrication failure caused by the heat dissipation degradation of traditional air cooling, and significantly reducing the frequency of unit failures.

[0020] Secondly, relying on the deep coupling of the water replenishment system and the waste heat recovery system, the ambient temperature water is heated to the medium temperature range once by the heat exchanger and then heated again by the waste heat source heat pump to the temperature range suitable for the operating conditions. This perfectly matches the operating conditions of the steam booster system, completely eliminating the energy consumption of additional water heating in traditional solutions, further reducing operating costs, and aligning with the trends of energy conservation, emission reduction, and carbon reduction. Coupled with an intelligent control system, the heat exchange path and intensity can be dynamically adjusted to keep lubricating oil temperature fluctuations within a small range, improving the system's adaptability to operating condition fluctuations, reducing wear on compressor components, and extending the unit's service life to a certain extent.

[0021] Furthermore, through the modular integration of the five major systems, the equipment occupies a smaller area than traditional distributed systems, and eliminates the need for high-noise air-cooled fans and additional heating equipment. The operating noise level is reduced from a high level to a low level, making it more suitable for the space and noise requirements of indoor industrial scenarios and improving installation and operation flexibility. Attached Figure Description

[0022] This application can be better understood by describing the embodiments in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the structure of an intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to this application.

[0023] Explanation of icon numbers: 1. Steam compressor; 2. Water supply pipe; 3. Oil pump; 4. Oil tank; 5. Heat exchanger; 6. Waste heat source heat pump; 7. Intelligent controller; 8. First temperature sensor; 9. Second temperature sensor; 10. Electric three-way regulating valve; 11. Pressure sensor; 12. Electric heating element; 13. Lubricating oil filter. Detailed Implementation

[0024] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 limitations on this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides a method such as Figure 1 The diagram shows an intelligent control system for cooling water replenishment in a high-efficiency waste heat recovery steam compressor.

[0030] The high-efficiency waste heat recovery type intelligent control system for cooling water replenishment of a steam compressor includes a steam booster system, a water replenishment system, a lubricating oil cooling system, and a waste heat recovery system. The steam booster system includes a steam compressor 1. The water replenishment system includes a water replenishment pipe 2. The lubricating oil cooling system includes an oil pump 3 and an oil tank 4. The waste heat recovery system includes a heat exchanger 5 and a waste heat source heat pump 6. The water replenishment pipe 2 connects to the water replenishment port of the steam compressor 1 after passing through the heat absorption end of the heat exchanger 5 and / or the heat absorption end of the waste heat source heat pump 6. The oil return port of the steam compressor 1, the oil pump 3, the oil tank 4, and the oil inlet of the steam compressor 1 are connected to form a lubricating oil circulation path, further equipped with the heat release end of the heat exchanger 5 and / or the heat release end of the waste heat source heat pump 6.

[0031] Preferably, the oil pump 3 is a variable frequency gear pump. This variable frequency gear pump can dynamically adjust its speed according to the lubricating oil circulation requirements. Compared with a fixed speed oil pump, it can reduce ineffective energy consumption under non-full load conditions, and at the same time avoid uneven lubrication caused by excessive fluctuations in lubricating oil flow, thereby improving the energy efficiency and reliability of the lubricating oil circulation system.

[0032] Preferably, the intelligent control system for cooling water replenishment of the high-efficiency waste heat recovery type steam compressor further includes an intelligent control system, which includes an intelligent controller 7. The intelligent controller 7 is connected to the steam boosting system, the water replenishment system, the lubricating oil cooling system, and / or the waste heat recovery system. Specifically, the intelligent controller 7 can be connected to the electrode drive module of the steam compressor 1, the frequency conversion drive module of the oil pump 3, and the compressor drive module of the waste heat source heat pump 6.

[0033] Preferably, the intelligent control system further includes a first temperature sensor 8 and a second temperature sensor 9 connected to the intelligent controller 7. The first temperature sensor 8 is located near the outlet of the heat exchanger 5 at the heat release end, and the second temperature sensor 9 is located near the oil inlet of the steam compressor 1. The first temperature sensor 8 can capture the temperature change of the lubricating oil after it has released heat through the heat exchanger 5 in real time, providing a basis for the start-up, shutdown, and load adjustment of the waste heat source heat pump 6. The second temperature sensor 9 directly monitors the temperature of the lubricating oil entering the steam compressor 1, ensuring that the oil temperature is always within a safe operating range, avoiding a decrease in lubrication performance due to excessively high oil temperature or an increase in flow resistance due to excessively low oil temperature, and keeping oil temperature fluctuations within a small range.

[0034] Preferably, a pressure sensor 11 is further provided in the lubricating oil circulation path, and the pressure sensor 11 is connected to the intelligent controller 7. The pressure sensor 11 can be used to detect abnormalities such as blockages and leaks in the lubricating oil circulation path in a timely manner. With the intelligent controller 7 providing early warning and taking control measures, the damage to the oil pump 3 and insufficient lubricating oil supply caused by abnormal pressure can be reduced, thereby reducing the frequency of unit maintenance.

[0035] Preferably, a flow regulating valve is further provided in the lubricating oil circulation path, and the flow regulating valve is connected to the intelligent controller 7. The intelligent controller 7 can dynamically adjust the opening of the flow regulating valve according to the oil temperature and oil pressure data, and accurately control the ratio of lubricating oil flowing through the heat exchanger 5 and the waste heat source heat pump 6, so as to ensure the cooling effect of the lubricating oil and avoid local lubrication deficiency caused by excessive diversion.

[0036] Preferably, the oil tank 4 is equipped with an electric heating element 12, which is connected to the intelligent controller 7. When the ambient temperature is low, causing the viscosity of the lubricating oil in the oil tank 4 to increase, the intelligent controller 7 activates the electric heating element 12 to preheat the lubricating oil, reducing flow resistance and preventing excessive starting load on the oil pump 3 or poor lubricating oil delivery.

[0037] Preferably, a lubricating oil filter 13 is further provided in the lubricating oil circulation passage. The lubricating oil filter 13 can be used to filter impurities, metal shavings, etc. generated during the circulation process, to prevent impurities from entering the steam compressor 1 and causing component wear or seal failure, thereby reducing maintenance costs.

[0038] In some embodiments, the waste heat recovery system further includes an electrically operated three-way regulating valve 10. Preferably, the electrically operated three-way regulating valve 10 is an electrically operated three-way regulating valve 10 with independently adjustable valve core openings at its three ports. The outlet of the heat exchanger 5's heat absorption end is connected to the inlet of the electrically operated three-way regulating valve 10, the inlet of the waste heat source heat pump 6's heat absorption end is connected to the outlet of the electrically operated three-way regulating valve 10, and the water supply port of the steam compressor 1 is connected to the other outlet of the electrically operated three-way regulating valve 10. When the first temperature sensor 8 detects that the oil temperature at the outlet of the heat exchanger 5's heat release end is lower than a preset threshold, the intelligent controller 7 can control the electrically operated three-way regulating valve 10 to adjust its opening, reducing or cutting off the supply of water to the heat absorption end of the waste heat source heat pump 6, thus avoiding excessive heat exchange and energy waste. When the oil temperature is higher, the proportion of water supplied to the heat absorption end of the waste heat source heat pump 6 is increased to enhance the waste heat recovery effect. The electric three-way regulating valve 10 can independently adjust the opening of the three ports according to the water replenishment temperature requirements and the residual heat of the lubricating oil, so as to realize the flexible switching between two water replenishment heating modes: preheating only the heat exchanger 5 and cascade preheating of the heat exchanger 5 and the waste heat source heat pump 6. This adapts to the water replenishment temperature requirements under different working conditions and avoids the energy waste of a single heating mode.

[0039] In summary, during the operation of the intelligent control system for cooling water replenishment in a high-efficiency waste heat recovery steam compressor, the lubricating oil circulation path and the water replenishment system achieve energy coupling through the waste heat recovery system. After the lubricating oil is discharged from the oil return port of the steam compressor 1, it flows sequentially through the heat release end of the heat exchanger 5 and the heat release end of the waste heat source heat pump 6 to release heat, and then is transported back to the oil tank 4 for buffering by the oil pump 3, and finally returns to the steam compressor 1 through the oil inlet to complete the cycle. The replenishment water first enters the heat absorption end of the heat exchanger 5 through the replenishment water pipe 2 to absorb the waste heat of the lubricating oil, and then is distributed to the heat absorption end of the waste heat source heat pump 6 for further heat absorption according to the operating conditions via the electric three-way regulating valve 10, or is directly transported to the water replenishment port of the steam compressor 1, forming a closed loop of waste heat utilization of lubricating oil heat release and water heat absorption.

[0040] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency waste heat recovery type intelligent control system for cooling water replenishment of steam compressor, characterized in that: The high-efficiency waste heat recovery type steam compressor cooling water replenishment intelligent control system includes a steam boosting system, a water replenishment system, a lubricating oil cooling system, and a waste heat recovery system; the steam boosting system includes a steam compressor; the water replenishment system includes a water replenishment pipeline; the lubricating oil cooling system includes an oil pump and an oil tank; the waste heat recovery system includes a heat exchanger and a waste heat source heat pump; the water replenishment pipeline is connected to the water replenishment port of the steam compressor after passing through the heat absorption end of the heat exchanger and / or the heat absorption end of the waste heat source heat pump; the oil return port of the steam compressor, the oil pump, the oil tank, and the oil inlet of the steam compressor are connected to form a lubricating oil circulation path, and the heat release end of the heat exchanger and / or the heat release end of the waste heat source heat pump are further provided on the lubricating oil circulation path.

2. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 1, characterized in that, The oil pump is a variable frequency gear pump.

3. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 1, characterized in that, The intelligent control system for cooling and water replenishment of the high-efficiency waste heat recovery steam compressor further includes an intelligent control system, which includes an intelligent controller. The intelligent controller is connected to the steam boosting system, the water replenishment system, the lubricating oil cooling system, and / or the waste heat recovery system.

4. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 3, characterized in that, The intelligent control system also includes a first temperature sensor and a second temperature sensor connected to the intelligent controller. The first temperature sensor is located near the outlet of the heat exchanger's heat dissipation end, and the second temperature sensor is located near the oil inlet of the steam compressor.

5. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 3, characterized in that, A pressure sensor is further provided in the lubricating oil circulation path, and the pressure sensor is connected to the intelligent controller.

6. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 3, characterized in that, A flow regulating valve is further provided in the lubricating oil circulation path, and the flow regulating valve is connected to the intelligent controller.

7. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 3, characterized in that, The oil tank is equipped with an electric heating element, which is connected to the intelligent controller.

8. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 1, characterized in that, A lubricating oil filter is further provided in the lubricating oil circulation passage.

9. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 1, characterized in that, The waste heat recovery system further includes an electric three-way regulating valve, the outlet of the heat exchanger's heat absorption end is connected to the inlet of the electric three-way regulating valve, the inlet of the waste heat source heat pump's heat absorption end is connected to the outlet of the electric three-way regulating valve, and the water inlet of the steam compressor is connected to the other outlet of the electric three-way regulating valve.

10. The intelligent control system for cooling water replenishment of a high-efficiency waste heat recovery type steam compressor according to claim 9, characterized in that, The electric three-way regulating valve is an electric three-way regulating valve whose valve core opening can be adjusted independently at its three ports.

Images