Heat supply network drainage cooling method, device and system

Abstract

The invention discloses a heat supply network drainage cooling method, device and system, and relates to the technical field of power plant heat supply equipment, the system is applied to a control unit in a heat supply network drainage cooling system, the system further comprises a heat supply network water conveying pipe used for conveying heat supply network drainage, and the heat supply network water conveying pipe is sequentially provided with an inlet water temperature detection part, a detection part and a plurality of drainage coolers in the water flow direction. The method comprises the steps of obtaining the initial temperature of heat supply network drainage; and according to the initial temperature, the multiple drain coolers are controlled to operate. And the water outlet temperature in the drain cooler close to the condenser is obtained. Judging whether the outlet water temperature is smaller than a first threshold value or not; and if yes, draining water is directly discharged into a condenser. The input number of the drain coolers is controlled according to the initial temperature, so that stepped cooling of the heat supply network drain in the heat supply network drain pipe is achieved, the problem that the treatment capacity of the system is reduced due to anion and cation resin degradation in follow-up condensate polishing treatment is avoided, and meanwhile the problem that the pump body of a condensate pump is subjected to cavitation due to the fact that the condensate water temperature is too high is solved.

Description

Technical Field

[0001] This invention relates to the field of power plant heating equipment technology, and more specifically, to a method, apparatus and system for cooling a heating network by draining water. Background Technology

[0002] my country's combined heat and power (CHP) system began in the 1950s. After several stages of development, it has now become an operational mode that simultaneously meets the needs of heating, industrial steam supply, and electricity supply. Due to regional climate reasons, traditional heating areas are mainly concentrated in the northern regions during winter. A heat network (also known as a heating pipe network) is a pipe network system that uses pipes and heat carriers (usually water as the working medium) to transfer heat produced by thermal power plants to heat users. It can be divided into the primary network of the initial station within the thermal power plant, the primary network between the initial station and regional heat exchange stations, and the secondary network between regional heat exchange stations and heat users.

[0003] Due to design differences (such as different equipment manufacturers or different models from the same manufacturer), the condensate from the heat exchange of the primary heating network heater can be discharged in three ways: directly to the condenser, directly to the deaerator, or discharged to the condensate pipeline between the two and recycled to the steam turbine steam-water circulation system. Current regulations require that heating network condensate and other high-temperature working fluids should not be directly introduced into the feedwater system. They should be cooled before being connected to the condenser and treated by fine treatment equipment before entering the feedwater system to avoid deterioration of feedwater quality.

[0004] However, most of the condensate drains in current heating networks are high-temperature, high-flow-rate drains. In traditional technologies, excessively high condensate temperatures can easily cause degradation of the anion and cation resins during the fine treatment process, leading to a decrease in the system's processing capacity. At the same time, direct discharge of high-temperature heating network condensate into the condenser can easily cause the inlet water temperature of the condensate pump to exceed the standard, resulting in cavitation of the condensate pump body. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method, device and system for cooling the condensate drain of a heating network, so as to alleviate the technical problems in the prior art where excessively high condensate temperature easily causes degradation of anion and cation resins and a decrease in treatment capacity during the fine treatment process, and at the same time, direct discharge of high-temperature condensate drain into the condenser easily leads to excessive inlet water temperature of the condensate pump, causing cavitation of the condensate pump body.

[0006] In a first aspect, embodiments of the present invention provide a method for cooling a heat network by condensation, applied to a control unit in a heat network by condensation cooling system, the system further comprising: The heating network water supply pipe is used to transport the heating network condensate. Along the water flow direction, the heating network water supply pipe is equipped with inlet water temperature detection devices and multiple condensate coolers. The outlet end of the heating network water supply pipe is connected to the condenser.

[0007] The methods include: Obtain the initial temperature of the hydrophobic area of ​​the heating network.

[0008] The operation of multiple hydrophobic coolers is controlled based on the initial temperature.

[0009] Obtain the outlet water temperature in the hydrophobic cooler near the condenser.

[0010] Determine whether the outlet water temperature is lower than the first threshold.

[0011] If so, discharge the effluent into the condenser.

[0012] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the hydrophobic cooler includes: a first cooler, a second cooler, and a third cooler.

[0013] The first, second, and third coolers are arranged sequentially along the direction of the heat network drainage.

[0014] The steps for controlling the operation of multiple hydrophobic coolers based on the initial temperature include: The target cooler is determined based on the comparison between the initial temperature and multiple temperature thresholds.

[0015] Control the operation of the target cooler to cool the condensate drain of the heating network.

[0016] In conjunction with the first aspect, embodiments of the present invention provide a possible implementation of the first aspect, comprising the step of determining a target cooler based on a comparison between an initial temperature and multiple temperature thresholds, including: If T > T1, the target coolers are determined to be the first cooler, the second cooler, and the third cooler.

[0017] If T1 > T > T2, the target coolers are determined to be the second and third coolers.

[0018] If T < T2, the target cooler is determined to be the third cooler.

[0019] Where T is the initial temperature, T1 is the second threshold, T2 is the third threshold, and T1 > T2.

[0020] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein a return bypass is provided at the outlet of the third cooler.

[0021] The outlet of the return bypass is connected to the inlet of the third cooler.

[0022] Following the step of controlling the operation of the target cooler to cool the condensate drain of the heating network, the following steps are also included: If the outlet water temperature of the third cooler is lower than the minimum value in the preset range, the return bypass is activated, and at the same time, the third cooler is adjusted to increase the flow rate of the heat network drain.

[0023] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, which, after the step of controlling the operation of the target cooler to cool the condensate drain of the heating network, further includes: If the outlet water temperature of the third cooler is higher than the maximum value in the preset range, adjust the third cooler to reduce the flow rate of the heat network drain.

[0024] In conjunction with the first aspect, embodiments of the present invention provide one possible implementation of the first aspect, wherein the system further includes: The first bypass connects to the inlet and outlet of the first cooler, respectively.

[0025] If T1 > T > T2, the steps to determine the target cooler as the second and third coolers also include: If T1 > T > T2, the first bypass is activated.

[0026] In conjunction with the first aspect, embodiments of the present invention provide one possible implementation of the first aspect, wherein the system further includes: The second bypass connects to the inlet and outlet of the second cooler, respectively.

[0027] If T < T2, the steps to determine the target cooler as the third cooler also include: If T < T2, the first bypass and the second bypass are activated.

[0028] Secondly, this application provides a heat network condensate cooling device, applied to the control unit of the aforementioned heat network condensate cooling system, the device comprising: The first acquisition module is used to acquire the initial temperature of the hydrophobic area of ​​the heating network.

[0029] The first control module is used to control the operation of multiple hydrophobic coolers based on the initial temperature.

[0030] The second acquisition module is used to acquire the outlet water temperature in the hydrophobic cooler near the condenser.

[0031] The judgment module is used to determine whether the outlet water temperature is less than the first threshold.

[0032] The second control module is used to discharge the effluent into the condenser when the effluent temperature is lower than the first threshold.

[0033] Thirdly, this application provides a thermal network hydrophobic cooling system, including a control unit, which is used to execute the method provided in the above embodiments.

[0034] In conjunction with the third aspect, the present invention provides a possible implementation of the third aspect, wherein the heat network condensate cooling system further includes a heat network condensate pump, a heat network condensate pipe, an inlet water temperature detection device, and a condensate cooler.

[0035] The heating network drain pump is used to pump out the drain water from the heating network.

[0036] One end of the heating network drain pipe is connected to the heating network drain pump and used to transport heating network drain water, while the other end is used to connect to the condenser.

[0037] The inlet water temperature detection device is located at the outlet end of the heating network drain pump.

[0038] Multiple condensate coolers are arranged sequentially along the direction of the heat network condensate flow in the heat network condensate pipe.

[0039] The embodiments of the present invention bring the following beneficial effects: In the heat network condensate cooling method provided by the present invention, heat network condensate is transported through a heat network condensate pipe, and an inlet water temperature detection device and multiple condensate coolers are sequentially installed on the heat network condensate pipe. When transporting heat network condensate, the initial temperature of the heat network condensate can be obtained according to the inlet water temperature detection device. When the initial temperature of the heat network condensate is low, the heat network condensate can be directly discharged into the condenser. When the initial temperature of the heat network condensate is high, the number of multiple condensate coolers can be controlled according to the initial temperature, thereby realizing the stepwise cooling of the heat network condensate in the heat network condensate pipe. After the heat network condensate is cooled stepwise, it is discharged into the condenser, so that it can be safely and stably mixed with the condensate in the condenser, avoiding pump body cavitation of the condensate pump. At the same time, it can also avoid the problem of degradation of anion and cation resins in subsequent condensate polishing, which leads to a decrease in system processing capacity.

[0040] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 A schematic flowchart of a heat network hydrophobic cooling method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection relationship of a heat network hydrophobic cooling system provided in an embodiment of the present invention.

[0044] Figure label: 100. Heat network drain pump; 200. Heat network drain pipe; 210. Direct discharge bypass; 220. First cooler; 221. First bypass; 230. Second cooler; 231. Second bypass; 240. Third cooler; 241. Return bypass; 300. Condenser; 400. Inlet water temperature detection device. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] To facilitate understanding of this embodiment, the technical terms used in this application will be briefly introduced below.

[0047] Heat network condensate: Heat network condensate refers to the liquid water formed by the condensation of steam (usually extracted steam from the turbine or other waste heat steam) used to heat the circulating water (or primary hot water) in the heat network heater after releasing heat. A certain water level needs to be maintained in the heat network heater to ensure its normal operation. Excess liquid water is automatically discharged into the turbine's steam-water circulation system via a heat network condensate pump, thereby improving the economic efficiency of the heating unit.

[0048] Condenser: It exchanges heat with steam through cooling water (water-cooled) or air (air-cooled), and the released latent heat of vaporization is carried away by the cooling medium, completing the phase change process. Surface condensers use metal tube bundles (such as copper tubes or titanium tubes) as heat exchange surfaces. Steam condenses outside the tubes, while cooling water flows inside the tubes, forming a highly efficient heat exchange.

[0049] After introducing the technical terms used in this application, the application scenarios and design concepts of the embodiments of this application will be briefly described below.

[0050] Since my country's combined heat and power (CHP) system began in the 1950s, after several stages of development, it has now become an operational mode that simultaneously meets the needs of heating, industrial steam supply, and power generation. Due to regional climate reasons, traditional heating areas are mainly concentrated in the northern regions during winter. A heat network (also known as a heating pipe network) is a pipe network system that uses pipes and heat carriers (usually water as the working medium) to transfer heat produced by thermal power plants to heat users. It can be divided into the primary network of the initial station within the thermal power plant, the primary network between the initial station and regional heat exchange stations, and the secondary network between regional heat exchange stations and heat users. Previously, the condensate from the heaters in the initial station heat network had three discharge paths due to design differences (different equipment manufacturers or different models from the same manufacturer): direct discharge to the condenser, direct discharge to the deaerator, or discharge to the condensate pipeline between the two for recycling into the turbine steam-water circulation system. This has been a subject of debate among researchers both domestically and internationally.

[0051] Recently, the National Energy Administration issued a new version of the "Twenty-Five Key Requirements for Preventing Power Production Accidents (2023 Edition)" which requires in section 6.5.6 (11) that "high-temperature working fluids such as heat network condensate are prohibited from directly entering the feedwater system. They should be cooled before being connected to the condenser and treated by fine treatment equipment before entering the feedwater system to avoid deterioration of feedwater quality." Heat network condensate is mostly high-temperature, high-flow-rate condensate. Direct discharge of traditional high-temperature heat network condensate into the condenser can easily lead to excessive condensate pump inlet water temperature, causing cavitation in the condensate pump body. At the same time, excessively high condensate temperature can also lead to degradation of anion and cation resins and reduced treatment capacity in the fine treatment process. How to safely and stably transfer it to the condenser without interfering with the existing system has become a widely studied topic.

[0052] Against this backdrop, this application innovatively proposes a method for efficient cascade utilization and cooling recovery of heat network heater condensate. The condensate is cooled and then replenished to the condenser. After fine treatment, it participates in the unit's steam-water circulation, effectively solving a problem that has plagued heating companies.

[0053] Example 1 Combination Figure 1 , Figure 2 This embodiment provides a method for cooling a heat network by condensation in a control unit applied to a heat network condensation cooling system.

[0054] The heating network condensate cooling system also includes a heating network water supply pipe. The heating network condensate pipe is used to transport heating network condensate. Along the water flow direction, the heating network water supply pipe is equipped with inlet water temperature detection devices and multiple condensate coolers. The outlet end of the heating network water supply pipe is connected to the condenser.

[0055] Methods for cooling heating networks by condensing water include: S100, obtain the initial temperature of the thermal network condensate drain.

[0056] The S200 controls the operation of multiple hydrophobic coolers based on the initial temperature.

[0057] S300 obtains the outlet water temperature in the hydrophobic cooler near the condenser.

[0058] S400 determines whether the outlet water temperature is lower than the first threshold.

[0059] If it is S500, the effluent will be discharged into the condenser.

[0060] Specifically, in this embodiment, the heat network condensate is discharged into the heat network condensate drain pipe 200 to achieve the transportation of the heat network condensate. An inlet water temperature detection element 400 and multiple condensate coolers are sequentially installed on the heat network condensate drain pipe 200. During the transportation of the heat network condensate, the temperature of the heat network condensate discharged into the heat network condensate drain pipe 200 can be detected by the inlet water temperature detection element 400, thereby obtaining the initial temperature of the heat network condensate.

[0061] When the initial temperature of the heat network condensate is low, the condensate is directly discharged into the condenser 300. When the initial temperature of the heat network condensate is high, the number of multiple condensate coolers is controlled according to the initial temperature, thereby achieving stepped cooling of the heat network condensate in the heat network condensate pipe 200.

[0062] After the condensate from the heating network is cooled down in stages, it is discharged into the condenser 300. It can be safely and stably mixed with the condensate in the condenser 300, avoiding cavitation of the condensate pump body. At the same time, it can also avoid the problem of degradation of the anion and cation resins in the subsequent condensate polishing process, which would lead to a decrease in the system's processing capacity.

[0063] Furthermore, in this embodiment, the heat network drain pipe 200 is also equipped with a flow detection device for detecting the inflow rate of water and a pressure detection device for monitoring the water pressure inside the heat network drain pipe 200, so as to achieve auxiliary control and enable the heat network drain cooling system to maintain stable operation.

[0064] Furthermore, in this embodiment, the first threshold is specifically 50°C.

[0065] In this embodiment, the hydrophobic cooler specifically includes a first cooler 220, a second cooler 230, and a third cooler 240.

[0066] Furthermore, the first cooler 220, the second cooler 230, and the third cooler 240 are arranged sequentially along the conveying direction of the heat network condensate.

[0067] Step S200, the step of controlling the operation of multiple hydrophobic coolers based on the initial temperature, includes: S210, based on the comparison between the initial temperature and multiple temperature thresholds, determines the target cooler.

[0068] S220 controls the operation of the target cooler to cool the condensate drain of the heating network.

[0069] In this embodiment, there are three hydrophobic coolers, which are respectively configured as a first cooler 220, a second cooler 230 and a third cooler 240.

[0070] The first cooler 220, the second cooler 230, and the third cooler 240 are arranged sequentially along the conveying direction of the heat network condensate, and can accurately determine the target cooler based on the comparison between the initial temperature of the heat network condensate and multiple preset temperature thresholds.

[0071] For example, when the initial temperature is in different temperature ranges, one or more of the first cooler 220, the second cooler 230, or the third cooler 240 can be selectively activated as the target cooler to achieve refined, multi-stage cooling control of the heat network condensate. This avoids the problems of insufficient or excessive cooling that may be caused by a single cooling method, and optimizes energy utilization efficiency.

[0072] Furthermore, this method allows for more uniform temperature changes in the heat network condensate during the gradual cooling process, reducing thermal stress on the equipment and further improving system stability and reliability. Ultimately, the heat network condensate is safely and efficiently cooled to the target temperature, effectively preventing condensate pump cavitation caused by excessive condenser inlet water temperature (300°C) and protecting the anion and cation exchange resins in the fine treatment system from high-temperature degradation, thus maintaining the system's processing capacity.

[0073] In this embodiment, step S210, which determines the target cooler based on the comparison between the initial temperature and multiple temperature thresholds, includes: S211, if T > T1, determine the target coolers as the first cooler, the second cooler, and the third cooler.

[0074] S222, if T1>T>T2, determine the target coolers as the second and third coolers.

[0075] S223, if T < T2, determine the target cooler as the third cooler.

[0076] It should be noted that T is the initial temperature of the hydrophobic zone of the heating network (i.e., the detection result of the inlet water temperature detection device), T1 is the second threshold, T2 is the third threshold, and T1 > T2.

[0077] Specifically, in this embodiment, when the inlet water temperature is greater than the first threshold, the inlet water temperature detection device 400 detects three operating conditions: high temperature, medium temperature, and low temperature.

[0078] In the case of high-temperature operation (T > T1), the first cooler 220, the second cooler 230, and the third cooler 240 are activated simultaneously in this embodiment to form a three-stage series cooling system. By distributing the heat load step by step, excessive pressure on a single cooler is avoided, ensuring that the high-temperature condensate is sufficiently cooled to a safe range and eliminating the risk of the condenser 300 inlet water temperature exceeding the standard.

[0079] Under medium-temperature conditions (T1 > T > T2), the first cooler 220 is shut down, and the second cooler 230 and the third cooler 240 are started. While ensuring the cooling effect, the ineffective operation of the first cooler 220 is reduced, thereby reducing system energy consumption and equipment wear, while maintaining the reliability of temperature control.

[0080] Low temperature conditions (T < T2): Only the third cooler 240 (last stage) is operated. This avoids energy waste caused by overcooling, while ensuring that the condensate temperature meets the condenser 300 safe inlet water requirements and protecting the condensate pump from cavitation.

[0081] In this embodiment, the first cooler 220, the second cooler 230 and the third cooler 240 form a stepped cooling structure, which can disperse thermal shock during the cooling process, thereby extending the service life of each cooler and reducing system maintenance costs.

[0082] It should be noted that in this embodiment, T1 (i.e., the second threshold) is specifically 100°C, and T2 (i.e., the third threshold) is specifically 75°C.

[0083] In this embodiment, a return bypass 241 is provided at the outlet end of the third cooler 240. The outlet end of the return bypass 241 is connected to the inlet end of the third cooler 240.

[0084] In this embodiment, after step S220, which involves controlling the target cooler to cool the thermal network condensate, the method further includes: S221, if the outlet water temperature of the third cooler is lower than the minimum value in the preset range, the return bypass is opened, and at the same time, the third cooler is adjusted to increase the flow rate of the heat network drain.

[0085] In this embodiment, the preset range is 45°C to 55°C. That is, when the outlet water temperature of the third cooler 240 is greater than or equal to 45°C to less than or equal to 55°C, the outlet water temperature of the third cooler 240 reaches the preset range and can be discharged into the condenser 300.

[0086] In this embodiment, when the outlet water temperature of the third cooler 240 is lower than the minimum value in the preset range, that is, when the outlet water temperature of the third cooler 240 is less than 45°C, it can be considered that the outlet water temperature is too low. At this time, the return bypass 241 is opened so that the outlet water with the low temperature flows back to the inlet end of the third cooler 240 and mixes with the inlet water that has not flowed into the third cooler 240, thereby achieving pre-cooling of the high temperature water to be flowed into the third cooler 240, which can effectively reduce the load on the third cooler 240.

[0087] Furthermore, when the outlet water temperature of the third cooler 240 is too low, the flow rate of water entering the third cooler 240 is increased, thereby increasing the cooling water volume of the third cooler 240. Under the same power, the greater the water flow rate of the third cooler 240, the higher the outlet water temperature of the third cooler 240. This adjustment method can ensure that the outlet water temperature of the third cooler 240 is within the preset range while also increasing the cooling water volume of the third cooler 240, thus improving the efficiency of heat network drainage.

[0088] In this embodiment, after step S220, which controls the target cooler to cool the thermal network condensate, the following is also included: S222, If the outlet water temperature of the third cooler is higher than the maximum value in the preset range, adjust the third cooler to reduce the flow rate of the heat network drain.

[0089] Specifically, in this embodiment, when the outlet water temperature of the third cooler 240 is higher than the maximum value in the preset range, that is, when the outlet water temperature of the third cooler 240 is greater than 55°C, the flow rate of the water flowing into the third cooler 240 is adjusted to reduce. Similarly, under the same power, the smaller the water flow rate of the third cooler 240, the lower the outlet water temperature of the third cooler 240, thereby ensuring that the outlet water temperature of the third cooler 240 is within the preset range.

[0090] In this embodiment, the heat network drainage cooling system also includes a first bypass 221. The two ends of the first bypass 221 are respectively connected to the water inlet and water outlet of the first cooler 220.

[0091] Where T1 > T > T2, step S222, determining the target cooler as the second and third coolers, further includes: S2220, if T1>T>T2, the first bypass is activated.

[0092] Specifically, when the heat network condensate is under medium-temperature conditions (T1 > T > T2), by connecting the first bypass 221, the condensate can completely bypass the first cooler 220, avoiding ineffective heat exchange in the first cooler 220. This prevents the heat network condensate from flowing through the first cooler 220 under medium-temperature conditions, thus avoiding energy waste and equipment idle-load losses.

[0093] Furthermore, after the first bypass 221 is turned on, the heat network condensate directly enters the inlet of the second cooler 230 through the first bypass 221, shortening the flow path, thereby reducing the pressure loss of the pipeline system and improving the transport efficiency of the heat network condensate under medium temperature conditions, and reducing the additional power consumption of the condensate pump.

[0094] In this embodiment, the heat network drainage cooling system also includes a second bypass 231. The two ends of the second bypass 231 are respectively connected to the water inlet and water outlet of the second cooler 230.

[0095] Where T < T2, step S222, determining the target cooler as the third cooler, further includes: If T < T2, the first bypass and the second bypass are activated.

[0096] Similarly, when the heat network condensate is in a low-temperature condition (T < T2), by connecting the first and second bypasses, the condensate completely bypasses the first and second coolers and flows only through the third cooler (the final stage). This avoids the ineffective operation of the first two coolers, achieving "zero energy waste" and thus reducing system energy consumption.

[0097] Example 2 The heat network condensate cooling device provided in this embodiment is applied to the control unit of the heat network condensate cooling system provided in the above embodiment 1. The heat network condensate cooling device specifically includes: a first acquisition module, a first control module, a second acquisition module, a judgment module, and a second control module.

[0098] The first acquisition module is used to acquire the initial temperature of the hydrophobic zone of the heating network.

[0099] The first control module is used to control the operation of multiple hydrophobic coolers based on the initial temperature.

[0100] The second acquisition module is used to acquire the outlet water temperature in the hydrophobic cooler near the condenser 300.

[0101] The judgment module is used to determine whether the outlet water temperature is less than the first threshold.

[0102] The second control module is used to discharge the effluent into the condenser 300 when the effluent temperature is less than the first threshold.

[0103] Example 3 The thermal network condensate cooling system provided in this embodiment includes a control unit, which is used to execute the method provided in the above embodiment.

[0104] In addition, in this embodiment, the heat network drainage cooling system also includes a heat network drainage pump 100, a heat network drainage pipe 200, an inlet water temperature detection device 400, and a drainage cooler.

[0105] The heating network condensate pump 100 is used to pump out heating network condensate. One end of the heating network condensate pipe 200 is connected to the heating network condensate pump 100 and used to transport the heating network condensate; the other end is connected to the condenser 300. An inlet water temperature sensor 400 is located at the outlet end of the heating network condensate pump 100. Multiple condensate coolers are arranged sequentially along the direction of heating network condensate transport on the heating network condensate pipe 200.

[0106] Specifically, the control unit in this embodiment is compatible with any combination of method logic in the embodiment, and can be adapted to the condensate temperature range, cooler stage and bypass configuration of different power plants.

[0107] Furthermore, it should be noted that the heat network condensate pump 100 in this embodiment can be a pump body integrated into the condensate system of the heat network heater, providing stable initial power for the heat network condensate cooling system. An inlet water temperature sensor 400 is installed after the pump to directly measure the real-time temperature of the condensate after pumping. Multiple condensate coolers are sequentially arranged along the direction of heat network condensate transport, thereby forming multiple cooling cycles for the condensate. When cooling heat network condensate at different temperatures, different numbers of water coolers can be activated to effectively cool the condensate, ensuring that the temperature of the condensate flowing into the condenser 300 is within a preset range (i.e., the applicable range of the condenser 300).

[0108] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0109] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0110] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0112] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for cooling a heating network by condensation, characterized in that, A control unit applied to a thermal network hydrophobic cooling system, the system further comprising: A heating network water supply pipe is used to transport heating network condensate. The heating network water supply pipe is equipped with an inlet water temperature detection device and multiple condensate coolers in sequence along the water flow direction. The outlet end of the heating network water supply pipe is connected to a condenser. The method includes: Obtain the initial temperature of the hydrophobic area of ​​the heating network; Based on the initial temperature, control the operation of multiple hydrophobic coolers; Obtain the outlet water temperature in the hydrophobic cooler near the condenser; Determine whether the outlet water temperature is less than the first threshold; If so, discharge the effluent into the condenser.

2. The method for cooling a heat network by condensation according to claim 1, characterized in that, The hydrophobic cooler includes: a first cooler, a second cooler, and a third cooler; The first cooler, the second cooler, and the third cooler are arranged sequentially along the conveying direction of the heat network condensate. The step of controlling the operation of the plurality of hydrophobic coolers based on the initial temperature includes: The target cooler is determined based on the comparison between the initial temperature and multiple temperature thresholds; Control the operation of the target cooler to cool the condensate drain of the heating network.

3. The method for cooling a heat network by condensation as described in claim 2, characterized in that, The step of determining the target cooler based on the comparison relationship between the initial temperature and multiple temperature thresholds includes: If T > T1, the target cooler is determined to be the first cooler, the second cooler, and the third cooler; If T1 > T > T2, the target cooler is determined to be the second cooler and the third cooler; If T < T2, the target cooler is determined to be the third cooler; Where T is the initial temperature, T1 is the second threshold, T2 is the third threshold, and T1 > T2.

4. The method for cooling a heat network by condensation according to claim 3, characterized in that, The outlet of the third cooler is equipped with a return bypass; The outlet of the reflux bypass is connected to the inlet of the third cooler; Following the step of controlling the operation of the target cooler to cool the condensate drain of the heating network, the method further includes: If the outlet water temperature of the third cooler is lower than the minimum value in the preset range, the return bypass is activated, and at the same time, the third cooler is adjusted to increase the flow rate of the heat network drain.

5. The method for cooling a heat network by condensation according to claim 3, characterized in that, Following the step of controlling the operation of the target cooler to cool the condensate drain of the heating network, the method further includes: If the outlet water temperature of the third cooler is higher than the maximum value in the preset range, the third cooler is adjusted to reduce the flow rate of the heat network drain.

6. The method for cooling a heat network by condensation according to claim 3, characterized in that, The system also includes: The first bypass is connected to the inlet and outlet of the first cooler, respectively. The step of determining the target cooler as the second cooler and the third cooler if T1 > T > T2 further includes: If T1 > T > T2, the first bypass is activated.

7. The method for cooling a heat network by condensation according to claim 6, characterized in that, The system also includes: The second bypass is connected to the inlet and outlet of the second cooler, respectively. The step of determining the target cooler as the third cooler if T < T2 further includes: If T < T2, the first bypass and the second bypass are activated.

8. A heat network hydrophobic cooling device, characterized in that, A control unit applied in a thermal network hydrophobic cooling system, the device comprising: The first acquisition module is used to acquire the initial temperature of the hydrophobic area of ​​the heating network; The first control module is used to control the operation of multiple hydrophobic coolers according to the initial temperature. The second acquisition module is used to acquire the outlet water temperature in the hydrophobic cooler near the condenser; The judgment module is used to determine whether the outlet water temperature is less than a first threshold. The second control module is used to discharge the effluent into the condenser when the effluent temperature is less than the first threshold.

9. A hydrophobic cooling system for a heating network, characterized in that, It includes a control unit for performing the method as described in any one of claims 1-7.

10. The heat network hydrophobic cooling system according to claim 9, characterized in that, The heating network condensate cooling system also includes: A heat network drain pump (100) is used to pump out heat network drain water. A heat network drain pipe (200) is connected at one end to the heat network drain pump (100) and used to transport heat network drain water, and at the other end to the condenser (300); A water inlet temperature detection device (400) is installed at the outlet end of the heating network drain pump (100); Multiple hydrophobic coolers are arranged sequentially along the direction of hydrophobic flow in the hydrophobic pipe (200) of the heating network.

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