Dead steam heat energy recovery adjusting device and control method thereof

Abstract

The invention discloses a dead steam heat energy recovery adjusting device and a control method thereof.The dead steam heat energy recovery adjusting device is internally provided with a dead steam heat energy recovery cavity in a penetrating mode, and the left end and the right end of the dead steam heat energy recovery cavity are provided with a flash steam inlet and a residual pressure gas outlet correspondingly; a plurality of atomizing nozzles are arranged on the upper side in the dead steam heat energy recovery cavity at intervals; the method comprises the steps that a cold water inlet temperature, a hot water outlet temperature and an air inlet temperature obtained from a cold water inlet, a hot water outlet and a flash steam air inlet serve as state variables, the opening degree of a proportional-integral valve and the opening time of an atomization nozzle serve as action variables, and a recovery reinforcement learning model is constructed; a reward function is constructed through the hot water outlet temperature stability parameter and the energy consumption parameter, a reward signal is obtained through the reward function, and the recovery reinforcement learning model is optimized according to the reward signal; and the control strategy of the opening degree of the proportional-integral valve and the opening time of the atomizing nozzle is updated through the recovery reinforcement learning model.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust steam heat energy recovery, and in particular to an exhaust steam heat energy recovery regulating device and a control method thereof. Background Art

[0002] By recovering the heat energy of the exhaust steam after the steam condensate generated by the steam boiler system in the industrial sector is released, the waste of heat energy is reduced, the consumption of heating fuel is saved, the system operating cost is reduced, the operating efficiency is improved, and the white smoke phenomenon when the exhaust steam is discharged can be effectively eliminated. The existing exhaust steam heat recovery device contains a heat exchanger. After the exhaust steam enters the heat exchanger, it exchanges heat with the medium that needs to be heated (such as water or air). After the heat is extracted, the exhaust steam may cool into condensed water or consume part of the energy and be discharged through the device.

[0003] However, the existing device relies on the frequency conversion of the external primary and secondary side water pumps for adjustment, and cannot be specifically adjusted according to the flow and temperature of the incoming exhaust steam. The existing device is configured according to the basic operating conditions and cannot be adjusted according to the load changes of the heat source, resulting in large fluctuations in the outlet water temperature after heat recovery. The outlet water temperature of heat energy recovery with different production capacities in different time periods cannot be guaranteed, the temperature control ability is poor, and it cannot automatically adapt to different operating conditions.

[0004] Furthermore, existing devices basically use threaded tube heat exchangers or fin heat exchangers for heat exchange. The heat exchange process is affected by the thermal conductivity coefficient of the material itself, and it is impossible to recover heat energy 100%. In addition, for long-term steam-water heat exchange, if the water circulation end is not treated, it needs to be cleaned regularly, otherwise the problem of heat exchange performance attenuation caused by internal scaling and clogging is more prominent. In addition, existing devices all use tube-and-tube heat exchangers or fin heat exchangers for heat recovery, which can only recover the latent heat of exhaust steam, and the sensible heat of exhaust steam will be directly discharged, resulting in insufficient recovery of heat energy and energy waste.

[0005] The purpose of the present invention is to design a waste steam heat recovery and regulation device and a control method thereof in view of the above-mentioned problems in the prior art. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an exhaust steam heat energy recovery and regulation device and a control method thereof, which can solve the above-mentioned problems.

[0007] The present invention provides a waste steam heat energy recovery and regulation device. A waste steam heat energy recovery cavity is disposed through the interior of the waste steam heat energy recovery and regulation device. A flash steam inlet and a residual pressure gas discharge outlet are respectively disposed at the left and right ends of the waste steam heat energy recovery cavity. A plurality of atomizing nozzles are spacedly disposed on the upper side inside the waste steam heat energy recovery cavity. A cold water cavity is disposed on the outer periphery of the upper part of the waste steam heat energy recovery cavity inside the waste steam heat energy recovery and regulation device. The atomizing nozzles are connected to the cold water cavity. A cold water inlet is disposed on the upper side of the cold water cavity, and a proportional-integral valve is disposed at the cold water inlet. A hot water outlet is disposed on the outer periphery of the lower part of the waste steam heat energy recovery cavity inside the waste steam heat energy recovery and regulation device.

[0008] Cold water enters the cold water cavity through the cold water inlet via the proportional-integral valve. The cold water sprays water mist into the waste steam heat energy recovery cavity through a plurality of atomizing nozzles. The sprayed water mist contacts the flash steam entering through the flash steam inlet and condenses to form hot water, which is discharged through the hot water outlet. The residual pressure gas that does not form hot water is discharged through the residual pressure gas discharge outlet.

[0009] Further, the proportional-integral valve is connected to a control module for regulating the cold water inlet flow rate.

[0010] A cold water flow sensor is disposed at the cold water inlet. The cold water flow sensor is connected to the control module for obtaining the cold water flow rate.

[0011] A waste steam flow sensor is disposed at the flash steam inlet. The waste steam flow sensor is connected to the control module for obtaining the waste steam flow rate.

[0012] Further, temperature sensors are respectively disposed at the cold water inlet, the hot water outlet, and the flash steam inlet. The temperature sensors are connected to the control module for obtaining the cold water inlet temperature, the hot water outlet temperature, and the inlet temperature.

[0013] Further, a hollow heat insulation layer is disposed on the lower side outside the waste steam heat energy recovery cavity for heat preservation of the hot water at the bottom of the waste steam heat energy recovery cavity.

[0014] Further, a porous water baffle is disposed at the residual pressure gas discharge outlet for blocking the water vapor inside the waste steam heat energy recovery cavity.

[0015] The present invention provides a control method for a waste steam heat energy recovery and regulation device, including:

[0016] Taking the cold water inlet temperature, the hot water outlet temperature, and the inlet temperature obtained from the cold water inlet, the hot water outlet, and the flash steam inlet as state variables, and taking the opening degree of the proportional-integral valve and the opening time of the atomizing nozzles as action variables, to construct a recovery reinforcement learning model;

[0017] Construct a reward function based on the hot water outlet temperature stability parameter and the energy consumption parameter, obtain a reward signal through the reward function, and optimize the recycling reinforcement learning model according to the reward signal;

[0018] Update the control strategies of the proportional-integral valve opening and the atomizing nozzle opening time through the recycling reinforcement learning model.

[0019] Furthermore, before obtaining the cold water inlet temperature, the hot water outlet temperature, and the flash steam inlet temperature, execute:

[0020] Obtain the inlet temperature, and determine whether the current inlet temperature is greater than the first threshold. If so, open the proportional-integral valve and the atomizing nozzle.

[0021] Furthermore, the constructing the reward function through the hot water outlet temperature stability parameter and the energy consumption parameter includes:

[0022] Take the difference between the hot water outlet temperature and the set hot water temperature as the temperature stability parameter R 温度稳定性 ;

[0023] Calculate the energy consumption parameter R through the cold water flow rate and the waste steam release heat 能耗 ;

[0024] Construct a reward function through the hot water outlet temperature stability parameter and the energy consumption parameter, and the calculation formula is as follows:

[0025] R = w 1 R 温度稳定性 - w 2 R 能耗 ,

[0026] where, w 1 , w 2 Reward function weight coefficients.

[0027] Furthermore, the calculating the energy consumption parameter R through the cold water flow rate and the waste steam release heat 能耗 includes:

[0028] Obtain the cold water flow rate Q through the cold water flow rate sensor cold ;

[0029] Calculate the cold water energy consumption E through the cold water flow rate Q cold , the hot water outlet temperature T out , and the cold water inlet temperature T in , and the calculation formula is as follows: cold

[0030] E cold = Q cold c p (E out - T in ),

[0031] Among them, C p is the specific heat capacity of cold water;

[0032] The exhaust steam flow rate Q is obtained by the exhaust steam sensor steam ;

[0033] The latent heat value of exhaust steam h fg and exhaust steam flow Q steam Calculate the heat released by exhaust steam E steam , the calculation formula is as follows:

[0034] E steam =Q steam h fg ;

[0035] Calculate the energy consumption parameter R by using the cold water flow and the heat released by exhaust steam 能耗 , the calculation formula is as follows:

[0036] R 能耗 =E cold +E steam .

[0037] Further, obtaining a reward signal through a reward function and optimizing the recycling reinforcement learning model according to the reward signal include:

[0038] When the reward value of the reward function is higher than the reward threshold, it is marked as a positive reward signal, otherwise it is marked as a negative reward signal.

[0039] Beneficial effects of the present invention:

[0040] First, by designing the exhaust steam heat recovery chamber, the cold water is in direct contact with the exhaust steam in the form of spray (the cold water is sprayed into water mist through the atomizing nozzle), which significantly improves the heat exchange efficiency, can simultaneously recover the sensible heat and latent heat of the exhaust steam, reduce heat energy waste, and improve heat energy utilization. At the same time, the cold water chamber provides a stable supply of cold water to the atomizing nozzle to ensure spray uniformity and heat exchange efficiency, while simplifying the cold water supply structure. Through the control module, temperature sensor and flow sensor, the cold water flow can be dynamically adjusted according to real-time monitoring data, realizing intelligent control and improving temperature control capabilities.

[0041] Second, by taking the cold water inlet temperature, hot water outlet temperature, and air inlet temperature as state variables, a reinforcement learning model is constructed, so that the system can dynamically adjust the proportional integral valve opening and the atomizing nozzle opening time according to the real-time status to optimize the heat recovery efficiency. The intelligence level of the system is improved so that it can adapt to different working conditions and ensure the stability of the hot water outlet temperature. By obtaining the air inlet temperature in real time and judging whether it exceeds the first threshold, the system can intelligently judge whether the exhaust steam has enough heat energy for recovery, thereby dynamically controlling the opening of the proportional integral valve and the atomizing nozzle to avoid energy waste.

[0042] Thirdly, by constructing a reward function, the stability of the hot water outlet temperature and the energy consumption parameters are quantified as optimization objectives, enabling the system to find the best balance between temperature control and energy conservation. The introduction of the reward function enables the reinforcement learning model to continuously optimize the control strategy through positive or negative reward signals, improving the system operation efficiency. By quantifying the energy consumption of the cold water flow, the system can dynamically adjust the opening degree of the proportional-integral valve to ensure that the cold water flow minimizes energy consumption while meeting the temperature control requirements. By quantifying the heat released by the exhausted steam, the system can dynamically adjust the opening time of the atomizing nozzles to ensure the efficient utilization of the heat energy of the exhausted steam. Construct the energy consumption parameter R 能耗 Quantify the energy consumption relationship between the two to ensure the minimum energy consumption while meeting the stability of the hot water outlet temperature.

[0043] Fourthly, through the optimization of the reinforcement learning model, the control strategies for the opening degree of the proportional-integral valve and the opening time of the atomizing nozzles are dynamically updated, enabling the system to adapt to different working conditions and improve the heat energy recovery efficiency. The proportional-integral valve is used to dynamically adjust the cold water flow, and the atomizing nozzles are used to control the spraying intensity and coverage range of the cold water. The two work together to accurately adjust the supply amount and spraying effect of the cold water according to the real-time working conditions of the exhausted steam (such as flow rate and temperature), thereby stabilizing the hot water outlet temperature. The coordinated control of the proportional-integral valve and the atomizing nozzles can avoid excessive spraying of cold water or waste of heat energy of the exhausted steam while meeting the hot water outlet temperature requirements, realizing dynamic optimization of energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 It is the structure diagram of Real-time Example 1.

[0046] Figure 2 It is the method flowchart of Embodiment 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] For the convenience of those skilled in the art to understand, the embodiments will be further described in detail in conjunction with the drawings for the structure of the present invention. It should be understood that the steps mentioned in this embodiment, unless specifically stating their order, can be adjusted according to actual needs in terms of their front and back order, and can even be executed simultaneously or partially simultaneously.

[0048] As Figure 1 shown, the embodiments of the present invention provide an exhausted steam heat energy recovery and adjustment device,

[0049] Inside the waste steam heat energy recovery and regulation device, there is a waste steam heat energy recovery cavity 1 running through. At the left and right ends of the waste steam heat energy recovery cavity 1, there are a flash steam inlet 2 and a residual pressure gas discharge outlet 3 respectively. Inside the upper side of the waste steam heat energy recovery cavity 1, several atomizing nozzles 4 are arranged at intervals. Corresponding to the upper periphery of the waste steam heat energy recovery cavity 1 inside the waste steam heat energy recovery and regulation device, there is a cold water cavity 5. The atomizing nozzles 4 are connected to the cold water cavity 5. On the upper side of the cold water cavity 5, there is a cold water inlet 6, and a proportional-integral valve 7 is arranged at the cold water inlet 6; Corresponding to the lower periphery of the waste steam heat energy recovery cavity 1 inside the waste steam heat energy recovery and regulation device, there is a hot water outlet 8;

[0050] Cold water passes through the proportional-integral valve 7 and enters the cold water inlet 6 into the cold water cavity 5. The cold water sprays water mist into the waste steam heat energy recovery cavity 1 through several atomizing nozzles 4. The sprayed water mist contacts the flash steam entering from the flash steam inlet 2 and condenses to form hot water, which is discharged through the hot water outlet 8. The residual pressure gas that has not formed hot water is discharged through the residual pressure gas discharge outlet 3.

[0051] Furthermore, the proportional-integral valve 7 is connected to a control module 9 for regulating the cold water inlet flow rate;

[0052] A cold water flow sensor 10 is arranged at the cold water inlet 6. The cold water flow sensor 10 is connected to the control module 9 for obtaining the cold water flow rate;

[0053] A waste steam flow sensor 11 is arranged at the flash steam inlet 2. The waste steam flow sensor 11 is connected to the control module 9 for obtaining the waste steam flow rate.

[0054] Furthermore, temperature sensors 12 are respectively arranged at the cold water inlet 6, the hot water outlet 7, and the flash steam inlet 2. The temperature sensors are connected to the control module 9 for obtaining the cold water inlet temperature, the hot water outlet temperature, and the inlet temperature.

[0055] Furthermore, a hollow heat insulation layer 13 is arranged at the lower side outside the waste steam heat energy recovery cavity 1 for heat preservation of the hot water at the bottom of the waste steam heat energy recovery cavity.

[0056] Furthermore, a porous water baffle 14 is arranged at the residual pressure gas discharge outlet 3 for blocking the water vapor inside the waste steam heat energy recovery cavity.

[0057] In this embodiment, the existing device uses a threaded sleeve or a finned heat exchanger for heat exchange, with low heat exchange efficiency, and can only recover the latent heat part of the waste steam, while the sensible heat is directly discharged, resulting in energy waste. By designing the waste steam heat energy recovery cavity 1, cold water directly contacts the waste steam in the form of spray (the cold water is sprayed into water mist through the atomizing nozzle 4), significantly improving the heat exchange efficiency, being able to recover both the sensible heat and latent heat of the waste steam simultaneously, reducing heat energy waste, and enhancing the heat energy utilization rate. At the same time, the cold water cavity 5 provides a stable cold water supply for the atomizing nozzle 4, ensuring the spray uniformity and heat exchange efficiency, while simplifying the cold water supply structure.

[0058] The existing device cannot perform dynamic adjustment according to the flow rate and temperature of the waste steam, resulting in low heat energy recovery efficiency and poor temperature control ability. By setting the flash steam inlet 2, waste steam can be introduced and fully contact with the sprayed water mist, ensuring that the heat energy of the waste steam is efficiently recovered, and at the same time providing input parameters for subsequent dynamic adjustment.

[0059] When the existing device discharges waste steam, it is easy to produce a white smoke phenomenon, and the uncondensed residual pressure gas is not effectively treated, resulting in water vapor loss. The uncondensed residual pressure gas is discharged through the residual pressure gas outlet 3 to avoid the white smoke phenomenon, while reducing water vapor loss and improving the environmental impact. The porous water baffle 11 can block the water vapor inside the waste steam heat energy recovery cavity, reduce water vapor loss, and improve the system operation efficiency. Further, the hollow heat insulation layer 10 can effectively reduce heat dissipation, enhance the heat preservation performance of hot water, and further improve the heat energy recovery efficiency.

[0060] The existing device cannot dynamically adjust the cold water flow rate according to the waste steam flow rate and temperature, resulting in large fluctuations in the hot water outlet temperature. The cold water inlet 6 provides cold water input for the system, and combines with the proportional-integral valve 7 to achieve dynamic adjustment of the cold water flow rate, ensuring the stability of the hot water outlet temperature. The existing device relies on the variable frequency adjustment of an external water pump and cannot achieve modular intelligent adjustment, with poor adjustment ability. Through the control module 9, temperature sensor 11, cold water flow sensor 10, and waste steam flow sensor 11, the cold water flow rate can be dynamically adjusted according to real-time monitoring data, realizing intelligent control and enhancing the temperature control ability.

[0061] The waste steam heat energy recovery cavity 1 can adopt a stainless steel pipe shell, and the flash steam inlet 2 and the residual pressure gas outlet 3 are provided with flange interfaces, facilitating construction and installation docking.

[0062] As Figure 2 shown, Embodiment 2 provides a control method for a waste steam heat energy recovery and adjustment device, including:

[0063] S1 Taking the cold water inlet temperature, hot water outlet temperature, and inlet temperature obtained from the cold water inlet 6, hot water outlet 8, and flash steam inlet 2 as state variables, and taking the opening degree of the proportional-integral valve 7 and the opening time of the atomizing nozzle 4 as action variables, to construct a recovery reinforcement learning model;

[0064] Further, before obtaining the cold water inlet temperature, the hot water outlet temperature, and the flash steam inlet temperature, the following is performed:

[0065] Obtain the inlet temperature, determine whether the current inlet temperature is greater than the first threshold, and if so, open the proportional-integral valve 7 and the atomizing nozzle 4.

[0066] In this step, the existing device cannot dynamically adjust the opening degree of the proportional-integral valve 7 and the opening time of the atomizing nozzle 4 according to the real-time working conditions, resulting in large fluctuations in the hot water outlet temperature and poor temperature control ability. There is a lack of an intelligent control model and it cannot be optimized and adjusted according to multiple variables (such as cold water inlet temperature, hot water outlet temperature, and exhaust steam temperature). By using the cold water inlet temperature, the hot water outlet temperature, and the inlet temperature as state variables, a reinforcement learning model is constructed, enabling the system to dynamically adjust the opening degree of the proportional-integral valve 7 and the opening time of the atomizing nozzle 4 according to the real-time state, optimizing the heat energy recovery efficiency. Improve the intelligent level of the system, enabling it to adapt to different working conditions and ensuring the stability of the hot water outlet temperature. By obtaining the inlet temperature in real time and determining whether it exceeds the first threshold, the system can intelligently judge whether the exhaust steam has sufficient heat energy for recovery, thereby dynamically controlling the opening of the proportional-integral valve 7 and the atomizing nozzle 4 to avoid energy waste.

[0067] S2 constructs a reward function based on the hot water outlet temperature stability parameter and the energy consumption parameter, obtains a reward signal through the reward function, and optimizes the recovery reinforcement learning model according to the reward signal;

[0068] In this step, the existing device lacks comprehensive optimization of the hot water outlet temperature stability and energy consumption, resulting in low system operation efficiency and high energy consumption. It is impossible to quantify the balance between temperature stability and energy consumption, and it is difficult to achieve the dual goals of energy conservation and temperature control. By constructing a reward function, quantifying the hot water outlet temperature stability and energy consumption parameters as optimization goals enables the system to find the best balance point between temperature control and energy conservation. The introduction of the reward function enables the reinforcement learning model to continuously optimize the control strategy through positive or negative reward signals, improving the system operation efficiency.

[0069] S201 takes the difference between the hot water outlet temperature and the set hot water temperature as the temperature stability parameter R 温度稳定性 ;

[0070] In this step, by taking the difference between the hot water outlet temperature and the set value as the temperature stability parameter, the impact of temperature fluctuations on the system performance is quantified, providing a basis for optimizing the control strategy.

[0071] S202 calculates the energy consumption parameter R through the cold water flow rate and the heat released by the exhaust steam 能耗 , specifically:

[0072] Obtain the cold water flow rate Q through the cold water flow sensor 10 cold ;

[0073] Based on the cold water flow rate Q cold , the hot water outlet temperature T out , and the cold water inlet temperature T in calculate the cold water energy consumption E cold , and the calculation formula is as follows:

[0074] E cold =Q cold C p (T out -T in ),

[0075] where C p is the specific heat capacity of cold water;

[0076] Obtain the exhaust steam flow rate Q through the exhaust steam sensor 11 steam ;

[0077] Based on the latent heat value h fg of the exhaust steam and the exhaust steam flow rate Q steam calculate the heat released by the exhaust steam E steam , and the calculation formula is as follows:

[0078] E steam =Q steam h fg ;

[0079] Calculate the energy consumption parameter R based on the cold water flow rate and the heat released by the exhaust steam 能耗 , and the calculation formula is as follows:

[0080] R 能耗 =E cold +E steam .

[0081] In this step, through the calculation of the cold water flow rate and the heat released by the exhaust steam, accurately evaluate the energy consumption of the system, providing data support for optimizing the control strategy. Quantify the energy consumption parameter through the cold water flow rate and the heat released by the exhaust steam, enabling the system to achieve a dynamic balance between energy conservation and temperature control, reducing the operating cost. By quantifying the energy consumption of the cold water flow rate, the system can dynamically adjust the opening degree of the proportional-integral valve 7 to ensure that the cold water flow rate minimizes energy consumption while meeting the temperature control requirements. By quantifying the heat released by the exhaust steam, the system can dynamically adjust the opening time of the atomizing nozzle 4 to ensure the efficient utilization of the exhaust steam heat energy. Construct the energy consumption parameter R 能耗 to quantify the energy consumption relationship between the two, ensuring the minimization of energy consumption while meeting the stability of the hot water outlet temperature.

[0082] S203 constructs a reward function based on the hot water outlet temperature stability parameter and the energy consumption parameter, and the calculation formula is as follows:

[0083] R = w 1 R 温度稳定性 -w 2 R 能耗 ,

[0084] where w 1 、w 2 is the weight coefficient of the reward function.

[0085] In this step, by constructing a reward function, the temperature stability and energy consumption optimization are combined, and the system can comprehensively consider the temperature control and energy saving goals. The weight coefficient in the reward function can be adjusted according to actual needs, flexibly adapting to different working conditions, and improving the adaptability and operation efficiency of the system.

[0086] S204 If the reward value of the reward function is higher than the reward threshold, it is marked as a positive reward signal; otherwise, it is marked as a negative reward signal.

[0087] In this step, through the reward signal marking mechanism, the reinforcement learning model can obtain the effect feedback of the control strategy in real time and quickly optimize the control strategy. The positive reward signal encourages the system to maintain an efficient operating state, and the negative reward signal prompts the system to correct bad control behaviors, improving the learning efficiency and operation performance of the system.

[0088] S3 Update the control strategies for the opening degree of the proportional-integral valve 7 and the opening time of the atomizing nozzle 4 by recycling the reinforcement learning model.

[0089] In this step, the control strategy of the existing device is fixed and cannot be dynamically adjusted according to the real-time working conditions, resulting in low heat energy recovery efficiency. There is a lack of coordinated control of the proportional-integral valve 7 and the atomizing nozzle 4, making it difficult to achieve the overall optimization of the system. If the opening time lengths of the proportional-integral valve 7 and the atomizing nozzle 4 do not match, it may cause fluctuations in the hot water outlet temperature. For example, if the proportional-integral valve 7 is opened for too long and the cold water flow rate is too large, the hot water outlet temperature may be too low; if the atomizing nozzle 4 is opened for insufficient time and the spraying is not sufficient, the hot water outlet temperature may be too high. In addition, if the proportional-integral valve 7 is opened for too long and the cold water flow rate is too large, it may lead to an increase in cold water energy consumption and an increase in the system operation cost; if the atomizing nozzle 4 is opened for insufficient time and the waste steam heat energy is not fully utilized, sensible heat and latent heat may be wasted, reducing the overall energy efficiency of the system. Through the optimization of the reinforcement learning model, the control strategies for the opening degree of the proportional-integral valve 7 and the opening time of the atomizing nozzle 4 are dynamically updated, enabling the system to adapt to different working conditions and improve the heat energy recovery efficiency. The proportional-integral valve 7 is used to dynamically adjust the cold water flow rate, and the atomizing nozzle 4 is used to control the spraying intensity and coverage range of the cold water. When they work together, they can accurately adjust the supply amount of cold water and the spraying effect according to the real-time working conditions (such as flow rate and temperature) of the waste steam, thereby stabilizing the hot water outlet temperature. The coordinated control of the proportional-integral valve 7 and the atomizing nozzle 4 can, while meeting the hot water outlet temperature requirement, avoid excessive spraying of cold water or waste of waste steam heat energy, and achieve dynamic optimization of energy consumption.

[0090] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0092] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means that implement the function specified in one or more of the processes and / or blocks Figure 1 in one or more of the processes and / or blocks Figure 1 specified in the block or blocks.

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing steps for implementing the function specified in one or more of the processes and / or blocks Figure 1 in one or more of the processes and / or blocks Figure 1 specified in the block or blocks.

[0094] It should be noted that, in the claims, any reference signs placed in parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of other elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim listing several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. do not denote any order. These words may be interpreted as names.

[0095] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0096] It is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

[0097] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A waste steam heat energy recovery and regulation device, characterized in that: A waste steam heat energy recovery chamber (1) is provided inside the waste steam heat energy recovery regulating device, and flash steam inlets (2) and residual pressure gas outlets (3) are provided at left and right ends of the waste steam heat energy recovery chamber (1), respectively. A plurality of atomizing nozzles (4) are provided at intervals on the upper side of the waste steam heat energy recovery chamber (1). A cold water chamber (5) is provided inside the waste steam heat energy recovery regulating device corresponding to the upper periphery of the waste steam heat energy recovery chamber (1), and the atomizing nozzle (4) is connected to the cold water chamber (5). A cold water inlet (6) is provided on the upper side of the cold water chamber (5), and a proportional integral valve (7) is provided on the cold water inlet (6); a hot water outlet (8) is provided inside the waste steam heat energy recovery regulating device corresponding to the lower periphery of the waste steam heat energy recovery chamber (1); Cold water is passed through a proportional integral valve (7) into a cold water inlet (6) and into a cold water cavity (5). The cold water is sprayed onto the exhaust steam heat energy recovery cavity (1) through a plurality of atomizing nozzles (4). The sprayed water mist contacts the flash steam entering through the flash steam inlet (2) and condenses to form hot water which is discharged through a hot water outlet (8). The residual pressure gas which has not formed hot water is discharged through a residual pressure gas discharge outlet (3).

2. The exhaust steam heat energy recovery and regulation device according to claim 1 is characterized in that: The proportional-integral valve (7) is connected to the control module (9) and is used to regulate the cold water inlet flow rate; The cold water inlet (6) is provided with a cold water flow sensor (10), and the cold water flow sensor (10) is connected to the control module (9) and is used to obtain the cold water flow; The flash steam inlet (2) is provided with an exhaust steam flow sensor (11), and the exhaust steam flow sensor (11) is connected to a control module (9) for obtaining the exhaust steam flow.

3. The exhaust steam heat energy recovery and regulation device according to claim 2 is characterized in that: The cold water inlet (6), the hot water outlet (7) and the flash steam inlet (2) are respectively provided with temperature sensors (12), which are connected to the control module (9) and are used to obtain the cold water inlet temperature, the hot water outlet temperature and the air inlet temperature.

4. The exhaust steam heat energy recovery and regulation device according to claim 1, characterized in that: A hollow heat insulation layer (13) is provided on the lower side of the exterior of the exhaust steam heat energy recovery cavity (1) for heat preservation of hot water at the bottom of the exhaust steam heat energy recovery cavity.

5. The exhaust steam heat energy recovery and regulation device according to claim 1, characterized in that: The residual pressure gas discharge port (3) is provided with a multi-hole water retaining plate (14) for shielding water vapor inside the exhaust steam heat energy recovery cavity.

6. A control method for an exhaust steam heat recovery and regulation device, characterized in that: An exhaust steam heat energy recovery and regulation device according to any one of claims 1 to 5, comprising: The cold water inlet temperature, hot water outlet temperature and air inlet temperature obtained from the cold water inlet (6), hot water outlet (8) and flash steam air inlet (2) are used as state variables, and the opening degree of the proportional integral valve (7) and the opening time of the atomizing nozzle (4) are used as action variables to construct a recycling reinforcement learning model; A reward function is constructed through the hot water outlet temperature stability parameter and energy consumption parameter, a reward signal is obtained through the reward function, and a recycling reinforcement learning model is optimized according to the reward signal; The control strategy of updating the opening degree of the proportional integral valve (7) and the opening time of the atomizing nozzle (4) is achieved by recycling the reinforcement learning model.

7. The control method of the exhaust steam heat energy recovery and regulation device according to claim 6 is characterized in that: Before obtaining the cold water inlet temperature, the hot water outlet temperature, and the flash steam inlet temperature, the following is performed: The air inlet temperature is obtained, and it is determined whether the current air inlet temperature is greater than a first threshold value, and if so, the proportional integral valve (7) and the atomizing nozzle (4) are opened.

8. The control method of the exhaust steam heat energy recovery and regulation device according to claim 6, characterized in that: The reward function constructed by using the hot water outlet temperature stability parameter and the energy consumption parameter includes: The difference between the hot water outlet temperature and the set hot water outlet temperature is taken as the temperature stability parameter R 温度稳定性 ; Calculate the energy consumption parameter R by using the cold water flow and the heat released by exhaust steam 能耗 ; The reward function is constructed by the hot water outlet temperature stability parameter and energy consumption parameter. The calculation formula is as follows: R=w1R 温度稳定性 -w2R 能耗 , Among them, w1 and w2 are the weight coefficients of the reward function.

9. The control method of the exhaust steam heat energy recovery and regulation device according to claim 6, characterized in that: The energy consumption parameter R is calculated by the cold water flow and the heat released by the exhaust steam 能耗 include: The cold water flow rate Q is obtained by the cold water flow rate sensor (10) cold ; Through the cold water flow Q cold , hot water outlet temperature T out , cold water inlet temperature T in Calculate the cooling water energy consumption E cold , the calculation formula is as follows: E cold =Q cold C p (T out -T in ), Among them, C p is the specific heat capacity of cold water; The exhaust steam flow rate Q is obtained by the exhaust steam sensor (11) steam ; The latent heat value of exhaust steam h fg and exhaust steam flow Q steam Calculate the heat released by exhaust steam E steam , the calculation formula is as follows: E steam =Q steam h fg ; Calculate the energy consumption parameter R by using the cold water flow and the heat released by exhaust steam 能耗 , the calculation formula is as follows: R 能耗 =And cold +E steam 。 10. The control method of the exhaust steam heat energy recovery and regulation device according to claim 6, characterized in that: The step of obtaining a reward signal through a reward function and optimizing the recycling reinforcement learning model according to the reward signal includes: When the reward value of the reward function is higher than the reward threshold, it is marked as a positive reward signal, otherwise it is marked as a negative reward signal.

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