Cylinder switching energy supply system coupled with back pressure machine and heat pump
By using a cylinder cutting power supply system coupled with a backpressor and a heat pump in the thermal power set, the hydraulic shutdown valve and the minimum flow regulating valve are adjusted, so that the medium-pressure cylinder exhaust steam enters the energy supply unit, which solves the peak-shaving operation of the thermal power set. The problem of limited flexibility has achieved efficient heating and power generation.
Patent Information
- Application Number
- CN202421439595.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing thermal power units cannot achieve peak operation and lower peak shaving limits at the same time during peak shaving operation, resulting in limited flexibility.
The cylinder cutting energy supply system is adopted that couples the backpressor and the heat pump. By adjusting the hydraulic shutdown valve and the minimum flow regulating valve, the medium-pressure cylinder exhaust steam enters the energy supply unit, increasing the heat supply and reducing the peak shaving lower limit.
The external heat supply of thermal power units is increased, the lower peak shaving limit is reduced, the peak shaving interval of the unit is increased, and the residual heat in the circulating water is recovered through a heat pump, improving heating efficiency.
Smart Images
Figure CN222436431U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of operation of thermal power units, and in particular to a cylinder cutting energy supply system coupling a back pressure machine and a heat pump. Background Art
[0002] With the rapid development of the new energy industry, the power grid has put forward new requirements for the flexible peak-shaving capability of thermal power units. During the day when the amount of electricity generated by new energy enterprises is large, thermal power units need to reduce their own electricity load. At night, on rainy days, and in seasons with high wind abandonment rates, thermal power enterprises need to generate electricity at peak times. In addition, during the winter heating period in northern regions, residents' demand for centralized heating is increasing. The steam extraction capacity of the medium-pressure cylinder of the unit is limited, and the external heat supply of the unit needs to be further expanded. However, the increase in the unit's heat supply will limit the unit's power generation capacity. It can be seen that the existing traditional mode of determining electricity based on heat seriously affects the peak-shaving space of the unit, and it is impossible to achieve peak operation or reduce the lower limit of the unit's peak-shaving. Utility Model Content
[0003] The purpose of the present invention is to provide a cylinder cutting energy supply system that couples a back pressure machine and a heat pump, so as to solve the problem in the prior art that it is impossible to achieve peak operation and reduce the lower limit of the peak load regulation of the unit.
[0004] In order to achieve the above-mentioned object, the present disclosure provides a cylinder cutting energy supply system coupling a back pressure machine and a heat pump, wherein the cylinder cutting energy supply system comprises a cylinder cutting unit and an energy supply unit;
[0005] The cylinder cutting unit includes a medium-pressure cylinder, a low-pressure cylinder, a medium-pressure cylinder exhaust main line and a medium-pressure cylinder exhaust sub-line arranged in parallel; the medium-pressure cylinder and the low-pressure cylinder are connected through the medium-pressure cylinder exhaust main line and the medium-pressure cylinder exhaust sub-line; the medium-pressure cylinder exhaust main line includes an exhaust branch line and a heating branch line; a minimum flow regulating valve is provided on the medium-pressure cylinder exhaust sub-line; a hydraulic shut-off valve is provided on the exhaust branch line; the energy supply unit includes a back pressure machine, a heat pump device and a heat network heater; the back pressure machine includes an exhaust inlet and an exhaust outlet; the heat pump device includes an exhaust inlet, a drain outlet, a heat network water inlet, a first hot water exchange outlet, a warming cooling water inlet and a warming cooling water outlet; the heat network The heater includes an exhaust inlet, a drain outlet, a first hot water exchange inlet and a second hot water exchange outlet; the outlet of the heating branch line is respectively connected with the exhaust inlet of the back pressure machine and the exhaust inlet of the heat network heater; the exhaust outlet of the back pressure machine is connected with the exhaust inlet of the heat pump device; the drain outlet of the heat network heater and the drain outlet of the heat pump device are respectively used to communicate with the inlet of the boiler return pipe; the hot network water inlet of the heat pump device is used to communicate with the hot network water source, the first hot water exchange outlet of the heat pump device is connected with the first hot water exchange inlet of the hot network heater, and the second hot water exchange outlet of the hot network heater is used to communicate with the inlet of the heat using device.
[0006] Optionally, the power of the back pressure machine is 5 to 30 MW.
[0007] Optionally, the heat pump device comprises a lithium bromide heat pump.
[0008] Optionally, the cylinder cutting energy supply system also includes a hot water heater and a condenser; the hot water heater includes a drain inlet, a drain outlet, a boiler return water inlet and a boiler return water outlet; the condenser includes a low-pressure cylinder exhaust inlet, a drain inlet, a boiler return water outlet, a cooling water inlet and a warming cooling water outlet; the drain outlet of the heat network heater and the drain outlet of the heat pump device are respectively connected to the drain inlet of the hot water heater; the drain outlet of the hot water heater is connected to the drain inlet of the condenser, and the low-pressure cylinder exhaust inlet of the condenser is connected to the low-pressure cylinder exhaust outlet of the low-pressure cylinder; the boiler return water outlet of the condenser is connected to the boiler return water inlet of the hot water heater; the boiler return water outlet of the hot water heater is used to connect to the inlet of the boiler return water pipeline.
[0009] Optionally, the cylinder cutting energy supply system also includes a cooling tower; the cooling water outlet of the cooling tower is connected to the cooling water inlet of the condenser; the warming cooling water outlet of the condenser is connected to the warming cooling water inlet of the heat pump device; the warming cooling water outlet of the heat pump device is connected to the warming cooling water inlet of the cooling tower.
[0010] Optionally, the cylinder cutting energy supply system also includes a deaerator; the deaerator includes a boiler return water inlet and a deoxygenated water outlet; the boiler return water inlet of the deaerator is connected to the boiler return water outlet of the hot water heater; the deoxygenated water outlet of the deaerator is used to connect to the inlet of the boiler return water pipeline.
[0011] Optionally, the cylinder cutting energy supply system also includes a first hot network water jumper; the hot network water inlet pipeline of the heat pump device and the first hot water exchange water outlet pipeline of the heat pump device are connected through the first hot network water jumper; the first hot network water jumper is provided with a first hot network shut-off valve for adjusting the flow direction of the hot network water.
[0012] Optionally, a second hot water shut-off valve is provided on the hot water network inlet pipeline of the heat pump device, and the second hot water shut-off valve is arranged downstream of the connection between the first hot water network jumper and the hot water network inlet pipeline.
[0013] Optionally, the cylinder cutting energy supply system also includes a second hot water network jumper; the first hot water exchange inlet pipeline of the hot water network heater is connected to the second hot water exchange outlet pipeline of the hot water network heater through the second hot water network jumper; a third hot water shut-off valve is provided on the second hot water network jumper to adjust the flow direction of the hot water network.
[0014] Optionally, a fourth hot water shut-off valve is provided on the first hot water exchange inlet pipeline of the hot water network heater, and the fourth hot water shut-off valve is arranged downstream of the connection between the second hot water network water jumper and the first hot water exchange inlet pipeline.
[0015] Through the above technical solution, by adjusting the hydraulic shut-off valve and the minimum flow regulating valve, most of the exhaust steam of the medium-pressure cylinder of the system can enter the energy supply unit, which can not only improve the external heat supply of the cylinder cutting energy supply system, but also reduce the lower limit of the peak regulation of the unit. In addition, after cutting off the steam inlet of the low-pressure cylinder, the cold end loss of the condenser is greatly reduced, and the circulation efficiency of the entire system is improved. In addition, the high-quality steam of the medium-pressure cylinder is used to drive the back pressure machine to work. The power generation of the back pressure machine can provide part of the factory electricity and reduce the comprehensive power consumption rate of the power plant. The exhaust steam of the back pressure machine is used to drive the heat pump device, and the heat pump is used to recover the waste heat in the circulating water, so that the low-grade energy is fully utilized, which can greatly increase the external heat supply.
[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure, but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0018] Figure 1 It is a schematic diagram of a cylinder cutting energy supply system coupling a back pressure machine and a heat pump disclosed in the present invention.
[0019] Description of Reference Numerals
[0020] 1 cooling tower; 2 condenser; 3 deaerator; 4 back pressure machine; 5 heat pump device; 6 heating network heater; 7 hot water heater; 8 hydraulic shut-off valve; 9 minimum flow regulating valve; 10 first heating network water crossover line; 11 second heating network water crossover line; 12 first heating network shut-off valve; 13 second heating network shut-off valve; 14 third heating network shut-off valve; 15 fourth heating network shut-off valve;
[0021] IP medium pressure cylinder; LP low pressure cylinder. DETAILED DESCRIPTION
[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0023] In the present disclosure, unless otherwise stated, the terms "first, second, third, fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first, second, third, fourth" may explicitly or implicitly include one or more of the feature. In the description of the present disclosure, "plurality" means two or more, unless otherwise clearly and specifically defined.
[0024] like Figure 1 As shown, the present disclosure provides a cylinder cutting energy supply system coupling a back pressure machine and a heat pump, wherein the cylinder cutting energy supply system comprises a cylinder cutting unit and an energy supply unit;
[0025] The cylinder cutting unit comprises an intermediate pressure cylinder IP, a low pressure cylinder LP, an intermediate pressure cylinder exhaust main line and an intermediate pressure cylinder exhaust sub-line arranged in parallel; the intermediate pressure cylinder and the low pressure cylinder are connected through the intermediate pressure cylinder exhaust main line and the intermediate pressure cylinder exhaust sub-line; the intermediate pressure cylinder exhaust main line comprises an exhaust branch line and a heating branch line; a minimum flow regulating valve 9 is arranged on the intermediate pressure cylinder exhaust sub-line; a hydraulic shut-off valve 8 is arranged on the exhaust branch line;
[0026] The energy supply unit includes a back pressure machine 4, a heat pump device 5 and a heat network heater 6; the back pressure machine 4 includes an exhaust steam inlet and an exhaust steam outlet; the heat pump device 5 includes an exhaust steam inlet, a drain outlet, a heat network water inlet, a first hot water exchange outlet, a warming cooling water inlet and a warming cooling water outlet; the heat network heater 6 includes an exhaust steam inlet, a drain outlet, a first hot water exchange inlet and a second hot water exchange outlet;
[0027] The outlet of the heating branch line is respectively connected with the exhaust steam inlet of the back pressure machine 4 and the exhaust steam inlet of the heat network heater 6; the exhaust steam outlet of the back pressure machine 4 is connected with the exhaust steam inlet of the heat pump device 5; the drain outlet of the heat network heater 6 and the drain outlet of the heat pump device 5 are respectively used to communicate with the inlet of the boiler return pipe; the heat network water inlet of the heat pump device 5 is used to communicate with the heat network water source, the first hot water exchange outlet of the heat pump device 5 is connected with the first hot water exchange inlet of the heat network heater 6, and the second hot water exchange outlet of the heat network heater 6 is used to communicate with the inlet of the heat using device.
[0028] Through the above technical solution, by adjusting the hydraulic shut-off valve and the minimum flow regulating valve, most of the exhaust steam of the medium-pressure cylinder of the system can enter the energy supply unit, which can not only improve the external heat supply of the cylinder cutting energy supply system, but also reduce the lower limit of the peak regulation of the unit. In addition, after cutting off the steam inlet of the low-pressure cylinder, the cold end loss of the condenser is greatly reduced, and the circulation efficiency of the entire system is improved. In addition, the high-quality steam of the medium-pressure cylinder is used to drive the back pressure machine to work. The power generation of the back pressure machine can provide part of the factory electricity and reduce the comprehensive power consumption rate of the power plant. The exhaust steam of the back pressure machine is used to drive the heat pump device, and the heat pump is used to recover the waste heat in the circulating water, so that the low-grade energy is fully utilized, which can greatly increase the external heat supply.
[0029] In one embodiment, the cylinder cutting unit has a first working state and a second working state; when the cylinder cutting unit is in the first working state, the minimum flow regulating valve 9 is closed and the hydraulic shut-off valve 8 is opened, so that the medium-pressure cylinder IP and the low-pressure cylinder LP are connected through the medium-pressure cylinder exhaust main line, so that most of the medium-pressure cylinder exhaust steam enters the low-pressure cylinder to do work, and the remaining part of the medium-pressure cylinder exhaust steam enters the functional unit; when the cylinder cutting unit is in the second working state, the minimum flow regulating valve 9 is opened and the hydraulic shut-off valve 8 is closed, so that the medium-pressure cylinder IP and the low-pressure cylinder LP are connected through the medium-pressure cylinder exhaust secondary line, so that most of the medium-pressure cylinder exhaust steam enters the heating branch line for heating.
[0030] In this embodiment, when the power generation demand of the power plant unit is high and the heating demand is low, the cylinder cutting unit is put into the first working state; when the heating demand of the power plant unit is high, the cylinder cutting unit is put into the second working state. In the second working state, the external heating supply of the energy supply unit can be greatly improved to meet the growing heating demand in the northern region. At the same time, the peak load lower limit of the unit can be reduced, providing more space for new energy enterprises to access the grid, increasing the peak load range of the unit, and after cutting off the steam inlet of the low-pressure cylinder, the cold end loss of the condenser is greatly reduced, thereby improving the circulation efficiency of the entire system.
[0031] In one embodiment, the back pressure machine used in the present disclosure is a conventional choice in the art, and this application does not make any special requirements, as long as it can utilize the exhaust steam from the intermediate pressure cylinder to generate electricity. For example, the back pressure machine can be a synchronous back pressure steam turbine or an asynchronous back pressure steam turbine.
[0032] In one embodiment, the heat pump device 5 used in the present application is a conventional choice in the art, as long as it can recover the heat of the exhaust steam of the back compressor 4. For example, the heat pump device 5 is selected from a lithium bromide heat pump.
[0033] In one embodiment, the power of the back pressure machine 4 is 5 to 30 MW.
[0034] In a preferred embodiment, the power of the back pressure machine 4 is 5-25 MW.
[0035] In a further preferred embodiment, the power of the back pressure machine 4 is 7 MW.
[0036] In the above-mentioned embodiment, the high-quality steam of the medium-pressure cylinder is used to drive the back pressure machine 4 to do work. The power generation of the back pressure machine 4 can provide part of the factory electricity, reducing the comprehensive factory electricity consumption rate of the unit. The exhaust steam of the back pressure machine 4 is used to drive the absorption type large lithium bromide heat pump to do work. The heat pump technology is used to recover the waste heat in the circulating water, so that the low-grade energy is fully utilized, which can greatly improve the external heat supply, increase the heat-to-electricity ratio of the heat supply, and reduce the thermoelectric coupling degree.
[0037] In one embodiment, the cylinder cutting energy supply system further includes a hot water heater 7 for further recovering the temperature of the drain water of the heat pump device 5 and the heat network heater 6; and
[0038] Condenser 2, used to reduce the temperature of the drain of the heating network heater 6, the drain of the heat pump device 5 and the exhaust steam of the low-pressure cylinder;
[0039] The hot water heater 7 includes a drain inlet, a drain outlet, a boiler return water inlet and a boiler return water outlet; the condenser 2 includes a low-pressure cylinder exhaust inlet, a drain inlet, a boiler return water outlet, a cooling water inlet and a heating cooling water outlet;
[0040] The drain outlet of the heat network heater 6 and the drain outlet of the heat pump device 5 are respectively connected to the drain inlet of the hot water heater 7, so that the drain of the heat network heater 6 and the heat pump device 5 enters the hot water heater 7 for heat exchange; the drain outlet of the hot water heater 7 is connected to the drain inlet of the condenser 2, and the low-pressure cylinder exhaust inlet of the condenser 2 is connected to the low-pressure cylinder exhaust outlet of the low-pressure cylinder, so that the low-pressure cylinder exhaust and the drain of the hot water heater 7 can enter the condenser 2 for heat exchange; the boiler return water outlet of the condenser 2 is connected to the boiler return water inlet of the hot water heater 7, and the boiler return water outlet of the hot water heater 7 is used to be connected to the inlet of the boiler return water pipeline, so that the boiler return water formed in the condenser 2 is heat exchanged through the hot water heater 7.
[0041] In one embodiment, the cold source of the condenser 2 is the cooling water of the cooling tower 1. The cooling water outlet of the cooling tower 1 is connected to the cooling water inlet of the condenser 2, the warming cooling water outlet of the condenser 2 is connected to the warming cooling water inlet of the heat pump device 5, and the warming cooling water outlet of the heat pump device 5 is connected to the warming cooling water inlet of the cooling tower 1, so that the cooling water of the cooling tower 1 is returned to the cooling tower 1 for cooling after heat exchange in the condenser 2 and the heat pump device 5 in sequence.
[0042] In one embodiment, a filtering device is provided inside the condenser 2 or on the boiler return water outlet pipeline to reduce the oxygen content, hardness and conductivity of the condensed water. The filtering device may be a conventional membrane filtering device in the art.
[0043] In this embodiment, since the drain of the heat network heater 6 and the heat pump device 5 still has a high enthalpy value, the hot water heater 7 is used to heat the condensate of the low-pressure cylinder exhaust steam, and the drain heat is transferred to the condensate, so that the condensate temperature is increased, and the heat is used in a step-by-step manner. Due to the problems of high oxygen content, hardness and conductivity of the drain caused by the leakage of the heat network heater 6, after the drain of the hot water heater 7 is recovered to the condenser 2, the condensate quality can be improved through the deoxygenation function of the condenser 2 and the mixed bed filtration of the condensate system, thereby ensuring the water quality of the unit.
[0044] In one embodiment, the cylinder cutting energy supply system also includes a deaerator 3; the deaerator 3 includes a boiler return water inlet and a deoxygenated water outlet; the boiler return water inlet of the deaerator 3 is connected to the boiler return water outlet of the hot water heater 7; the deoxygenated water outlet of the deaerator 3 is used to connect to the inlet of the boiler return water pipeline.
[0045] In this embodiment, if there is oxygen in the boiler return water, after the boiler return water returns to the boiler, under high temperature conditions, the heat exchange tubes are prone to rust and corrosion. Therefore, setting a deaerator 3 before the boiler return water returns to the boiler can extend the service life of the boiler.
[0046] In a preferred embodiment, the drain outlet pipeline of the heating network heater 6 and the drain outlet pipeline of the heat pump device 5 merge into one to form a drain main line, and the outlet of the drain main line is connected to the drain inlet of the hot water heater 7, so that the drain from the heat pump device 5 and the heating network heater 6 can be mixed and then enter the hot water heater 7 for heat exchange.
[0047] In one embodiment, the cylinder cutting energy supply system also includes a first hot water network jumper 10; the hot water network inlet pipeline of the heat pump device 5 and the first hot water exchange water outlet pipeline of the heat pump device 5 are connected through the first hot water network jumper 10; the first hot water network water jumper 10 is provided with a first hot water network shut-off valve 12 for adjusting the flow direction of the hot water network.
[0048] In one embodiment, a second hot water shut-off valve 13 is provided on the hot water inlet pipeline of the heat pump device 5, and the second hot water shut-off valve 13 is arranged downstream of the connection between the first hot water jumper 10 and the hot water inlet pipeline.
[0049] In one embodiment, the cylinder cutting energy supply system also includes a second hot water network jumper 11; the first hot water exchange inlet pipeline of the hot water network heater 6 is connected with the second hot water exchange outlet pipeline of the hot water network heater 6 through the second hot water network jumper 11; the second hot water network water jumper 11 is provided with a third hot water network shut-off valve 14 for adjusting the flow direction of the hot water network.
[0050] In one embodiment, a fourth hot water shut-off valve 15 is provided on the first hot water inlet pipeline of the hot water network heater 6, and the fourth hot water shut-off valve 15 is arranged downstream of the connection between the second hot water network water jumper 11 and the first hot water inlet pipeline.
[0051] In the above embodiment, by arranging the first hot water network crossover line 10, the second hot water network crossover line 11, the first hot water network shut-off valve 12, the second hot water network shut-off valve 13, the third hot water network shut-off valve 14 and the fourth hot water network shut-off valve 15 at appropriate positions, the heat exchange of the hot water network will not be affected when an abnormality occurs in the heat pump device 5 or the hot water network heater 6.
[0052] In a specific implementation, when the heat pump device 5 is abnormal, the first hot water shut-off valve 12 can be opened and the second hot water shut-off valve 13 can be closed to allow the hot water network to directly enter the hot water network heater 6 through the first hot water crossover line 10 for heat exchange.
[0053] In another specific implementation, when the heat network heater 6 malfunctions, the third heat network shut-off valve 14 can be opened and the fourth heat network shut-off valve 15 can be closed, so that the heat network water can directly enter the subsequent heat-using device through the second heat network water cross-line 11 after heat exchange through the heat pump device 5.
[0054] In a specific implementation, the operation mode of the cylinder cutting energy supply system disclosed in the present invention includes:
[0055] Open the minimum flow regulating valve 9 and close the hydraulic shut-off valve 8, so that most of the medium-pressure cylinder exhaust steam enters the energy supply unit through the heating branch line. By adjusting the minimum flow regulating valve 9, a small part of the medium-pressure cylinder exhaust steam enters the low-pressure cylinder cooling rotor through the medium-pressure cylinder exhaust branch line for cooling;
[0056] The exhaust steam of the intermediate pressure cylinder entering the energy supply unit is divided into two streams, one stream enters the back pressure machine 4 to do work, and the exhaust steam of the back pressure machine is made to enter the heat pump device 5 for heat exchange to obtain the water discharge of the heat pump device 5; the other stream enters the heat network heater 6 for heat exchange to obtain the water discharge of the heat network heater 6; the water discharge of the heat pump device 5 and the water discharge of the heat network heater 6 are mixed and then enter the hot water heater 7 for heat exchange, and the water discharge of the hot water heater 7 and the exhaust steam of the low pressure cylinder enter the condenser 2 for condensation to obtain the boiler return water; the boiler return water is returned to the hot water heater 7 for heat exchange, and then treated by the deaerator 3 and returned to the boiler;
[0057] The cooling water of the cooling tower 1 is returned to the cooling tower 1 after heat exchange through the condenser 2 and the heat pump device 5 in sequence;
[0058] The heating network water is gradually heated by the heat pump device 5 and the heating network heater 6, and the heated heating network water enters the heat-using device;
[0059] When an abnormality occurs in the heat pump device 5, the first hot water shut-off valve 12 can be opened and the second hot water shut-off valve 13 can be closed, so that the hot network water directly enters the hot network heater 6 through the first hot network water crossover line 10 for heat exchange; when an abnormality occurs in the hot network heater 6, the third hot water shut-off valve 14 can be opened and the fourth hot water shut-off valve 15 can be closed, so that the hot network water directly enters the subsequent heat-using device through the second hot network water crossover line 11 after heat exchange in the heat pump device 5.
[0060] By adopting the method disclosed in the present invention, most of the exhaust steam of the medium-pressure cylinder of the system can enter the energy supply unit, which can not only improve the external heat supply of the energy supply system, but also reduce the lower limit of the peak load regulation of the unit. Moreover, after the steam inlet of the low-pressure cylinder is cut off, the cold end loss of the condenser is greatly reduced, and the circulation efficiency of the entire system is improved. In addition, the high-quality steam of the medium-pressure cylinder is used to drive the back pressure machine to do work. The power generation of the back pressure machine can provide part of the factory electricity and reduce the comprehensive power consumption rate of the power plant. The exhaust steam of the back pressure machine is used to drive the heat pump device, and the heat pump is used to recover the waste heat in the circulating water, so that the low-grade energy is fully utilized, which can greatly improve the external heat supply.
[0061] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0063] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A cylinder cutting energy supply system coupling a back pressure machine and a heat pump, characterized in that: The cylinder cutting energy supply system comprises a cylinder cutting unit and an energy supply unit; The cylinder cutting unit comprises an intermediate pressure cylinder (IP), a low pressure cylinder (LP), an intermediate pressure cylinder exhaust main line and an intermediate pressure cylinder exhaust sub-line arranged in parallel; the intermediate pressure cylinder (IP) and the low pressure cylinder (LP) are connected through the intermediate pressure cylinder exhaust main line and the intermediate pressure cylinder exhaust sub-line; the intermediate pressure cylinder exhaust main line comprises an exhaust branch line and a heating branch line; a minimum flow regulating valve (9) is arranged on the intermediate pressure cylinder exhaust sub-line; and a hydraulic shut-off valve (8) is arranged on the exhaust branch line; The energy supply unit comprises a back pressure machine (4), a heat pump device (5) and a heat network heater (6); the back pressure machine (4) comprises an exhaust steam inlet and an exhaust steam outlet; the heat pump device (5) comprises an exhaust steam inlet, a drain outlet, a heat network water inlet, a first hot water exchange water outlet, a warming cooling water inlet and a warming cooling water outlet; the heat network heater (6) comprises an exhaust steam inlet, a drain outlet, a first hot water exchange water inlet and a second hot water exchange water outlet; The outlet of the heating branch line is respectively connected to the exhaust steam inlet of the back pressure machine (4) and the exhaust steam inlet of the heat network heater (6); the exhaust steam outlet of the back pressure machine (4) is connected to the exhaust steam inlet of the heat pump device (5); the drain outlet of the heat network heater (6) and the drain outlet of the heat pump device (5) are respectively used to communicate with the inlet of the boiler return water pipeline; The heat network water inlet of the heat pump device (5) is used to communicate with the heat network water source, the first hot water exchange outlet of the heat pump device (5) is connected to the first hot water exchange inlet of the heat network heater (6), and the second hot water exchange outlet of the heat network heater (6) is used to communicate with the inlet of the heat-using device.
2. The cylinder cutting energy supply system according to claim 1, characterized in that: The power of the back pressure machine (4) is 5 to 30 MW.
3. The cylinder cutting energy supply system according to claim 1, characterized in that: The heat pump device (5) comprises a lithium bromide heat pump.
4. The cylinder cutting energy supply system according to claim 1, characterized in that: The cylinder cutting energy supply system also includes a hot water heater (7) and a condenser (2); The hot water heater (7) comprises a drain inlet, a drain outlet, a boiler return water inlet and a boiler return water outlet; The condenser (2) comprises a low-pressure cylinder exhaust steam inlet, a drain inlet, a boiler return water outlet, a cooling water inlet and a heating cooling water outlet; The drain outlet of the heating network heater (6) and the drain outlet of the heat pump device (5) are respectively connected to the drain inlet of the hot water heater (7); the drain outlet of the hot water heater (7) is connected to the drain inlet of the condenser (2), and the low-pressure cylinder exhaust inlet of the condenser (2) is connected to the low-pressure cylinder exhaust outlet of the low-pressure cylinder (LP); the boiler return water outlet of the condenser (2) is connected to the boiler return water inlet of the hot water heater (7); the boiler return water outlet of the hot water heater (7) is used to communicate with the inlet of the boiler return water pipeline.
5. The cylinder cutting energy supply system according to claim 4, characterized in that: The cylinder cutting energy supply system also includes a cooling tower (1); The cooling water outlet of the cooling tower (1) is connected to the cooling water inlet of the condenser (2); the warming cooling water outlet of the condenser (2) is connected to the warming cooling water inlet of the heat pump device (5); and the warming cooling water outlet of the heat pump device (5) is connected to the warming cooling water inlet of the cooling tower (1).
6. The cylinder cutting energy supply system according to claim 4, characterized in that: The cylinder cutting energy supply system also includes a deaerator (3); The deaerator (3) comprises a boiler return water inlet and a deoxygenated water outlet; The boiler return water inlet of the deaerator (3) is connected to the boiler return water outlet of the hot water heater (7); the deoxygenated water outlet of the deaerator (3) is used to communicate with the inlet of the boiler return water pipeline.
7. The cylinder cutting energy supply system according to claim 1, characterized in that: The cylinder cutting energy supply system further comprises a first heat network water jumper (10); the heat network water inlet pipeline of the heat pump device (5) and the first hot water exchange water outlet pipeline of the heat pump device (5) are connected via the first heat network water jumper (10); The first hot water network crossover line (10) is provided with a first hot water network shut-off valve (12) for adjusting the flow direction of the hot water network.
8. The cylinder cutting energy supply system according to claim 7, characterized in that: A second hot water shut-off valve (13) is provided on the hot water inlet pipeline of the heat pump device (5), and the second hot water shut-off valve (13) is arranged downstream of the connection between the first hot water jumper (10) and the hot water inlet pipeline.
9. The cylinder cutting energy supply system according to claim 1, characterized in that: The cylinder cutting energy supply system also includes a second hot network water crossover line (11); The first hot water exchange inlet pipeline of the heating network heater (6) is connected to the second hot water exchange outlet pipeline of the heating network heater (6) via the second heating network water jumper (11); A third hot water shut-off valve (14) is provided on the second hot water network crossover line (11) for adjusting the flow direction of hot water network.
10. The cylinder cutting energy supply system according to claim 9, characterized in that: A fourth hot water shut-off valve (15) is provided on the first hot water inlet pipeline of the hot water network heater (6), and the fourth hot water shut-off valve (15) is arranged downstream of the connection between the second hot water network water jumper (11) and the first hot water inlet pipeline.