Control device for heat network accident drainage treatment

Abstract

The application discloses a control device for heat network accident drain treatment, which comprises a water tank body, a diffusion energy dissipation module arranged in the lower part of the water tank body, an input end of the diffusion energy dissipation module connected with a heat network accident drain pipe, a water supplement module connected with a water inlet of the water tank body, a circulating module, a water inlet of the circulating module connected with a water outlet of the water tank body, a water outlet of the circulating module connected with a heat network circulating water return pipe, and a control module used for controlling the water supplement module to supplement water according to an optimal water supplement amount based on a drain temperature, a drain flow, a water supplement temperature and a target mixed temperature. In the application, the accident drain is dispersed into the water tank body through the diffusion energy dissipation module, the water supplement of the water supplement module also flows into the water tank body, the water supplement and the drain are mixed, the water supplement cools the drain, and when the mixed water reaches the target mixed temperature, the mixed water enters the heat network circulating water return pipe through the circulating module, so that the drain is effectively recycled and used, and water resources are saved.

Description

Technical Field

[0001] This invention belongs to the field of thermal network accident drainage technology, specifically relating to a control device for thermal network accident drainage treatment. Background Technology

[0002] In centralized heating systems, the heating network heaters, as key heat exchange equipment, play a crucial role in transferring steam extracted from turbines or industrial waste heat to the circulating water of the heating network. However, during operation, the heating network heaters may experience leakage failures. To ensure system safety, it is necessary to quickly drain large amounts of high-temperature emergency condensate to prevent equipment damage or system overpressure.

[0003] Currently, the treatment of emergency drainage from heating network heaters typically involves a simple discharge method: directly discharging the emergency drainage into a dedicated sewage cooling tank, relying on a large amount of low-temperature water to dilute and cool the high-temperature drainage.

[0004] However, while simple discharge methods are easy to construct, they do not make efficient use of water resources and cannot meet the requirements of safety and economy. Summary of the Invention

[0005] In view of this, the present invention provides a control device for handling drainage in heating network accidents, the main purpose of which is to solve the problem that existing control devices for handling drainage in heating network accidents do not make efficient use of water resources.

[0006] According to one aspect of this application, a control device for handling emergency drainage in a heating network is provided, comprising: a water tank body, a diffusion energy dissipation module disposed in the lower part of the water tank body, the input end of the diffusion energy dissipation module being connected to an emergency drainage pipe in the heating network, and a drainage temperature detection unit and a drainage flow detection unit being disposed in the emergency drainage pipe. A water replenishment module is connected to the water inlet of the water tank body. The water replenishment module is equipped with a water replenishment temperature detection unit and a water replenishment flow detection unit. A circulation module, wherein the inlet of the circulation module is connected to the outlet of the water tank body, and the outlet of the circulation module is connected to the return water pipe of the heating network circulation. The control module is electrically connected to the hydrophobic temperature detection unit, the hydrophobic flow detection unit, the water replenishment temperature detection unit, and the water replenishment flow detection unit. The control module is used to control the water replenishment module to replenish water according to the optimal water replenishment amount based on the hydrophobic temperature, the hydrophobic flow, the water replenishment temperature, and the target mixing temperature.

[0007] Optionally, the diffusion energy dissipation module includes a main water pipe and multiple branch water pipes. The inlet of the main water pipe is located on the side wall of the water tank body. The inlet of the main water pipe is connected to the emergency water pipe of the heating network. Multiple branch water pipes are connected to the main water pipe, and each branch water pipe is provided with multiple water outlets, swirl dispersion heads, or nozzles.

[0008] Optionally, the control device for handling drainage in case of a heating network accident further includes a detection module, which is disposed in the water tank body and electrically connected to the control module. The detection module is used to detect the water level and temperature in the water tank body. The control module is also used to calculate the amount of water to be drained based on the drainage flow rate and drainage time. When water is stored in the water tank, the volume of the existing water is calculated based on the liquid level of the existing water in the water tank. The objective function is to minimize the amount of water to be replenished, and the mixing temperature range and the amount of water to be replenished in the pipeline are used as constraints. The objective function is then solved to obtain the optimal amount of water to be replenished.

[0009] Optionally, the objective function is:

[0010] The constraints are:

[0011]

[0012] Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, T0 is the temperature of the existing water, V0 is the volume of the existing water, and T low The lowest mixing temperature, T high The maximum mixing temperature is represented by k, which is a coefficient.

[0013] Optionally, the control module is further configured to calculate the optimal water replenishment amount based on the hydrophobic temperature, hydrophobic water volume, water replenishment temperature, and preset target mixing temperature when the water tank body is not filled with water. The optimal water replenishment amount is calculated using the following formula: Qb=Qs×(Ts-Th) / (Th-Tb) Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, and Th is the preset target mixing temperature.

[0014] Optionally, the control device for handling drainage in case of a heating network accident further includes a top overflow pipe and a bottom drain pipe. The top overflow pipe is connected to the overflow port at the top of the water tank body, and the bottom drain pipe is connected to the drain port at the bottom of the water tank body. Each of the top overflow pipe and the bottom drain pipe is equipped with a control valve, and both the top overflow pipe and the bottom drain pipe are connected to the sewage drainage system.

[0015] Optionally, when water is stored in the water tank body, and the sum of the optimal replenishment amount and the volume of existing water is greater than the water capacity of the water tank body, a first difference between the sum of the water volume and the water capacity of the water tank body is calculated. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe according to the first difference.

[0016] Optionally, when the water tank body is not stored in water and the optimal water replenishment amount is greater than the water capacity of the water tank body, a second difference between the optimal water replenishment amount and the water capacity of the water tank body is calculated. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe according to the second difference.

[0017] Optionally, when no water from a heating network accident flows into the water tank body, the control device for the heating network accident drainage treatment acts as a water replenishment tank. When the actual liquid level detected by the detection module is lower than the preset liquid level threshold, the control module outputs a water replenishment control signal to the water replenishment module.

[0018] Optionally, the circulation module comprises an inlet pipe and a water pump. The first end of the inlet pipe is connected to the circulation outlet of the water tank body, the second end of the inlet pipe is connected to the inlet of the water pump, and the outlet of the water pump is connected to the return water pipe of the heating network circulation.

[0019] By employing the above-described technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages: This application provides a control device for handling emergency condensate in a heating network. The water tank body is equipped with a diffusion and energy dissipation module. The top of the water tank body is connected to a water replenishment module, and the bottom of the water tank is connected to a circulation module. When emergency condensate flows in, the condensate is dispersed into the water tank body through the diffusion and energy dissipation module, and the replenishment water from the water replenishment module also flows into the water tank body. The replenishment water and condensate mix, which is equivalent to the replenishment water cooling the condensate. When the mixed water reaches the target mixing temperature, the mixed water enters the heating network circulating water return pipe through the circulation module, realizing the effective recycling and utilization of condensate and improving the utilization rate of water resources.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This paper shows a structural block diagram of a control device for handling drainage in heating network accidents, according to an embodiment of this application. Figure 2 The diagram shows the structural connection of the diffusion energy dissipation module of a control device for handling drainage in heating network accidents, as provided in an embodiment of this application.

[0022] Figure 3 This paper shows a partial structural connection diagram of a control device for handling drainage in heating network accidents, provided in an embodiment of this application.

[0023] in, Figures 1-3 In the middle: 1-Water tank body; 2-Diffusion energy dissipation module; 3-Water replenishment module; 4-Circulation module; 5-Control module; 7a-Temperature sensor inside the water tank body; 7b-Liquid level sensor inside the water tank body. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0025] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0026] To address the problem that existing control devices for handling drainage during heating network emergencies do not efficiently utilize water resources, this application provides a control device for handling drainage during heating network emergencies, such as... Figure 1 As shown, it includes: The water tank body 1 has a diffusion energy dissipation module 2 installed in the lower part of the water tank body 1. The input end of the diffusion energy dissipation module 2 is connected to the emergency drain pipe of the heating network. The emergency drain pipe of the heating network is equipped with a drain temperature detection unit and a drain flow detection unit. Water replenishment module 3 is connected to the water inlet of water tank body 1. Water replenishment module 3 is equipped with water replenishment temperature detection unit and water replenishment flow detection unit. The circulation module 4 has its inlet connected to the outlet of the water tank body 1, and its outlet connected to the return water pipe of the heating network circulation. Control module 5 is electrically connected to the condensate temperature detection unit, the condensate flow detection unit, the water replenishment temperature detection unit, and the water replenishment flow detection unit. Control module 5 is used to control water replenishment module 2 to replenish water according to the optimal water replenishment amount based on the condensate temperature, condensate flow, water replenishment temperature, and target mixing temperature.

[0027] Specifically, the water tank body is equipped with a diffusion energy dissipation module, the top of the water tank body is connected to a water replenishment module, and the bottom of the water tank is connected to a circulation module.

[0028] When emergency condensate flows in, the water tank body acts as a cooling tank for the condensate. When no emergency condensate flows in, the water tank body functions as the return tank for the heating network's circulating water. When emergency condensate flows in, it enters the diffusion and energy dissipation module, and then disperses into the water tank body. The water tank body contains stored water or makeup water that flows in, mixing with the dispersed emergency condensate, which effectively cools the condensate. When the mixed water reaches a preset temperature, it is then fed into the heating network's circulating water return pipe through the circulation module.

[0029] When emergency condensate flows in, the condensate temperature detection module detects the condensate temperature and transmits the detected temperature to the control module. The condensate flow detection module detects the condensate flow rate and transmits the detected flow rate to the control module. The control module calculates the optimal replenishment amount based on the principle of heat conservation, considering the replenishment temperature, condensate temperature, and condensate flow rate. Based on the optimal replenishment amount, the control module outputs a control signal to the replenishment module, controlling it to output the optimal replenishment amount, thus achieving the goal of cooling the condensate with minimal water. Once the condensate has cooled to the target mixing temperature, the mixed water in the water tank enters the heating network circulating water return pipe through the circulation module.

[0030] This application provides a control device for handling emergency condensate in a heating network. Compared with the prior art, the water tank body is equipped with a diffusion energy dissipation module, a water replenishment module is connected to the top of the water tank body, and a circulation module is connected to the bottom of the water tank. When emergency condensate flows in, the condensate is dispersed into the water tank body through the diffusion energy dissipation module, and the replenishment water from the water replenishment module also flows into the water tank body. The replenishment water and condensate mix, which is equivalent to the replenishment water cooling the condensate. When the mixed water reaches the target mixing temperature, the mixed water enters the heating network circulating water return pipe through the circulation module, realizing the effective recycling and utilization of condensate and improving the utilization rate of water resources.

[0031] In one embodiment of the present invention, the diffusion energy dissipation module includes a main water pipe and multiple branch water pipes. The inlet of the main water pipe is located on the side wall of the water tank body. The inlet of the main water pipe is connected to the emergency water pipe of the heating network. Multiple branch water pipes are connected to the main water pipe. Each branch water pipe is provided with multiple water outlets, swirl dispersion heads, or nozzles.

[0032] Specifically, the diffusion energy dissipation module is located inside the water tank body and adopts a multi-branched and porous pipe structure. Its core function is to disperse the high-speed jet of high-temperature hydrophobic water into countless tiny streams, allowing it to rapidly, fully, and uniformly exchange and mix with the large amount of room-temperature makeup water stored in the tank. This achieves safe and efficient cooling and eliminates steam and vibration. Figure 2 As shown, a porous structure can be installed on the branch water pipe, and hydrophobic dispersion can be achieved by using "swirl dispersion head", "perforated baffle" or "atomizing nozzle".

[0033] In one embodiment of the present invention, such as Figure 3 As shown, the control device for handling drainage in heating network accidents also includes a detection module. The detection module is installed inside the water tank body and includes a temperature sensor 7a and a liquid level sensor 7b. The detection module is electrically connected to the control module and is used to detect the liquid level and temperature of the water inside the water tank body. The control module is also used to calculate the amount of water to be drained based on the drainage flow rate and drainage time. When water is stored in the water tank, the volume of the existing water is calculated based on the liquid level of the existing water in the water tank. The objective function is to minimize the amount of water to be replenished, and the mixing temperature range and the amount of water to be replenished in the pipeline are used as constraints. The objective function is solved to obtain the optimal amount of water to be replenished.

[0034] Specifically, when there is water in the water tank, the water flowing in from the water replenishment module and the water already in the tank are used together to cool the condensate. The temperature after mixing meets the preset mixing temperature range. With the minimum water replenishment as the core objective function, the optimal water replenishment is obtained by combining the mixing temperature range constraint and the upper limit constraint of the pipeline water replenishment, so as to achieve the best effect with the least amount of water.

[0035] The objective function is:

[0036] The constraints are:

[0037]

[0038] Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, T0 is the temperature of the existing water, V0 is the volume of the existing water, and T low The lowest mixing temperature, T high The maximum mixing temperature is represented by k, which is a coefficient.

[0039] In one embodiment of the present invention, the control module is further configured to calculate the optimal water replenishment amount based on the hydrophobic temperature, the amount of hydrophobic water, the water replenishment temperature and the preset target mixing temperature when the water tank body is not stored in water. The optimal water replenishment amount is calculated using the following formula: Qb=Qs×(Ts-Th) / (Th-Tb) Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, and Th is the preset target mixing temperature.

[0040] Specifically, when there is no water in the water tank, the water flowing in from the water replenishment module is used to cool the hydrophobic water. The temperature after mixing reaches the target mixing temperature, which is greater than the minimum mixing temperature and less than the maximum mixing temperature. According to the law of conservation of matter and energy: Qs + Qb = Qh, Qs × Ts + Qb × Tb = Qh × Th, where Qh is the total volume of water after mixing, the two formulas are integrated and solved to obtain the optimal water replenishment amount.

[0041] In one embodiment of the present invention, the control device for handling drainage in heating network accidents further includes a top overflow pipe and a bottom drain pipe. The top overflow pipe is connected to the overflow port at the top of the water tank body, and the bottom drain pipe is connected to the drain port at the bottom of the water tank body. Each of the top overflow pipe and the bottom drain pipe is equipped with a control valve, and both the top overflow pipe and the bottom drain pipe are connected to the sewage drainage system.

[0042] Specifically, the emergency drainage time is usually very short, ranging from a few minutes to a dozen minutes. If the water level in the tank rises above the maximum allowable level after the emergency drainage and replenishment are mixed, the water will be discharged into the sewage drainage system through the top overflow pipe or the bottom drain pipe. The discharged water will not be recycled.

[0043] In one embodiment, when the water tank contains water and the sum of the optimal replenishment volume and the existing water volume is greater than the water capacity of the water tank, the control module calculates a first difference between the sum of the water volume and the water capacity of the water tank. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe based on the first difference.

[0044] In one embodiment, when the water tank body is not stored with water and the optimal water replenishment amount is greater than the water capacity of the water tank body, a second difference between the optimal water replenishment amount and the water capacity of the water tank body is calculated. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe based on the second difference.

[0045] Specifically, if the water level in the tank rises above the maximum allowable level after the emergency drain and replenishment water are mixed, the water will be discharged into the sewage drainage system through the top overflow pipe and / or the bottom drain pipe. The discharged water will not be recycled. However, in order to improve the recycling rate, a small amount of water will be discharged. When the water tank is filled with water, the first difference between the sum of the existing water volume and the optimal replenishment water volume and the water tank volume is calculated. When the water tank is not filled with water, the second difference between the optimal replenishment water volume and the water tank volume is calculated. The opening time of the control valve of the top overflow pipe and the control valve of the bottom drain pipe is controlled according to the first or second difference. A small amount of water will be discharged under the premise of reaching the mixing temperature, so that the remaining water can continue to be recycled and reused, thereby improving the water resource recycling rate.

[0046] In one embodiment, when no water from a heating network accident flows into the water tank body, the control device for the heating network accident drainage treatment acts as a water replenishment tank. When the actual liquid level detected by the detection module is lower than the preset liquid level threshold, the control module outputs a water replenishment control signal to the water replenishment module.

[0047] Specifically, when there is no emergency drainage, the control device for handling emergency drainage in the heating network operates as a regular water supply tank. The level sensor in the detection module continuously monitors the water level in the tank. When the water level falls below a preset threshold, the control module adjusts the opening of the water level control valve in the replenishment module according to standard logic to maintain the tank at the normal operating level. The water pump in the circulation module draws water from the tank based on the pressure or level requirements of the heating network's circulating water system, providing a stable and continuous supply of water to the system.

[0048] In one embodiment, the circulation module comprises an inlet pipe and a water pump. The first end of the inlet pipe is connected to the circulation outlet of the water tank body, the second end of the inlet pipe is connected to the inlet of the water pump, and the outlet of the water pump is connected to the return water pipe of the heating network circulation.

[0049] Specifically, the mixed water after cooling or the water used as makeup water in the makeup water tank is continuously pumped to the return water pipe through the water pump in the circulation module. The water temperature always meets the system requirements, thereby achieving complete recovery of emergency drainage and its heat, and achieving zero discharge.

[0050] It will be apparent to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. In one embodiment, they can be implemented using device-executable program code, thereby allowing them to be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular hardware and software combination.

[0051] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A control device for handling drainage in heating network accidents, characterized in that, include: The water tank body has a diffusion energy dissipation module installed in the lower part of the water tank body. The input end of the diffusion energy dissipation module is connected to the emergency drain pipe of the heating network. The emergency drain pipe of the heating network is equipped with a drain temperature detection unit and a drain flow detection unit. A water replenishment module is connected to the water inlet of the water tank body. The water replenishment module is equipped with a water replenishment temperature detection unit and a water replenishment flow detection unit. A circulation module, wherein the inlet of the circulation module is connected to the outlet of the water tank body, and the outlet of the circulation module is connected to the return water pipe of the heating network circulation. The control module is electrically connected to the hydrophobic temperature detection unit, the hydrophobic flow detection unit, the water replenishment temperature detection unit, and the water replenishment flow detection unit. The control module is used to control the water replenishment module to replenish water according to the optimal water replenishment amount based on the hydrophobic temperature, the hydrophobic flow, the water replenishment temperature, and the target mixing temperature.

2. The control device for handling drainage in heating network accidents according to claim 1, characterized in that, The diffusion energy dissipation module includes a main water pipe and multiple branch water pipes. The inlet of the main water pipe is located on the side wall of the water tank body. The inlet of the main water pipe is connected to the emergency water pipe of the heating network. Multiple branch water pipes are connected to the main water pipe. Each branch water pipe is provided with multiple water outlets, swirl dispersion heads, or nozzles.

3. The control device for handling drainage in heating network accidents according to claim 2, characterized in that, The control device for handling drainage in case of heating network accidents also includes a detection module, which is installed inside the water tank and electrically connected to the control module. The detection module is used to detect the water level and temperature inside the water tank. The control module is also used to calculate the amount of water to be drained based on the drainage flow rate and drainage time. When water is stored in the water tank, the volume of the existing water is calculated based on the liquid level of the existing water in the water tank. The objective function is to minimize the amount of water to be replenished, and the mixing temperature range and the amount of water to be replenished in the pipeline are used as constraints. The objective function is then solved to obtain the optimal amount of water to be replenished.

4. The control device for handling drainage in heating network accidents according to claim 3, characterized in that, The objective function is: The constraints are: Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, T0 is the temperature of the existing water, V0 is the volume of the existing water, and T low The lowest mixing temperature, T high The maximum mixing temperature is represented by k, which is a coefficient.

5. The control device for handling drainage in heating network accidents according to claim 3, characterized in that, The control module is also used to calculate the optimal water replenishment amount based on the hydrophobic temperature, hydrophobic water volume, water replenishment temperature and preset target mixing temperature when the water tank body is not stored in water. The optimal water replenishment amount is calculated using the following formula: Qb=Qs×(Ts-Th) / (Th-Tb) Where Qb is the optimal water replenishment amount, Ts is the hydrophobic temperature, Qs is the hydrophobic water volume, Tb is the water replenishment temperature, and Th is the preset target mixing temperature.

6. The control device for handling drainage in heating network accidents according to claim 5, characterized in that, The control device for handling drainage in case of heating network accidents also includes a top overflow pipe and a bottom drain pipe. The top overflow pipe is connected to the overflow port at the top of the water tank body, and the bottom drain pipe is connected to the drain port at the bottom of the water tank body. Each of the top overflow pipe and the bottom drain pipe is equipped with a control valve. Both the top overflow pipe and the bottom drain pipe are connected to the sewage drainage system.

7. The control device for handling drainage in heating network accidents according to claim 6, characterized in that, When the water tank contains water, and the sum of the optimal replenishment volume and the existing water volume is greater than the water capacity of the water tank, the control module calculates a first difference between the sum of the water volume and the water capacity of the water tank. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe based on the first difference.

8. The control device for handling drainage in heating network accidents according to claim 6, characterized in that, When the water tank body is not stored with water, and the optimal water replenishment amount is greater than the water capacity of the water tank body, the second difference between the optimal water replenishment amount and the water capacity of the water tank body is calculated. The control module is also used to output a water discharge control signal to the control valve of the top overflow pipe and the control valve of the bottom discharge pipe according to the second difference.

9. The control device for handling drainage in heating network accidents according to claim 4, characterized in that, When no water flows into the water tank body during a heating network accident, the control device for the heating network accident drainage treatment acts as a water replenishment tank. When the actual liquid level detected by the detection module is lower than the preset liquid level threshold, the control module outputs a water replenishment control signal to the water replenishment module.

10. The control device for handling drainage in heating network accidents according to any one of claims 1-9, characterized in that, The circulation module consists of an inlet pipe and a water pump. The first end of the inlet pipe is connected to the circulation outlet of the water tank body, the second end of the inlet pipe is connected to the inlet of the water pump, and the outlet of the water pump is connected to the return water pipe of the heating network circulation.

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