Industrial waste heat energy storage system based on geothermal energy storage

Abstract

The present invention relates to the field of geothermal energy storage technology, and in particular to an industrial waste heat energy storage system based on geothermal energy storage, the system comprising a waste heat recovery system for recovering high-temperature waste heat medium generated by an industrial process; a heat exchange system comprising a heat exchanger arranged below a medium transmission pipeline and connected to the medium transmission pipeline for heat exchange between the high-temperature waste heat medium and water, the heat exchanger comprising a medium inlet, a water inlet, a medium outlet and a water outlet; a water supply system comprising a water storage tank for storing water and a water delivery pipeline for delivering water; a heat storage system comprising a heat storage layer arranged below a first water delivery pipeline for storing heat energy and a second water delivery pipeline arranged on the right side of the heat storage layer and connected to the heat storage layer for delivering high-temperature water; the present invention determines the heat energy transmission efficiency by the temperature of the high-temperature water after the heat exchange and the output efficiency, thereby improving the accuracy of the control of the industrial waste heat energy storage process.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal energy storage, and particularly to an industrial waste heat energy storage system based on geothermal energy storage. Background Art

[0002] The utilization of industrial waste heat is an important link in energy conservation and emission reduction. At present, the popularization rate of medium and high temperature waste heat utilization technologies is not high, and the non-utilization of low temperature waste heat is one of the reasons for the low waste heat utilization rate in China. The investigation and analysis results of waste heat resources in industries such as steel, cement, glass, synthetic ammonia, caustic soda, calcium carbide, and sulfuric acid show that the waste heat resources in the above industrial industries are abundant, accounting for about 1 / 3 of the total energy consumption of these 7 industrial industries. However, there is a phenomenon of resource waste due to the low utilization rate of the above industrial waste heat resources in the existing technology.

[0003] Chinese Patent Application Publication No.: CN116878321A discloses an energy storage system coupled with industrial waste heat. It includes: an energy storage unit, which is connected to the waste heat channel of the industrial system through a waste heat utilization unit. The energy storage unit includes a first loop and a compressor and several stages of energy storage modules that are sequentially arranged on the first loop and are located after the waste heat utilization unit. The first loop flows through the waste heat utilization unit, and different energy storage modules are used to store heat energy of different grades; a heat release unit, which includes a second loop and a steam turbine generator arranged on the second loop. The second loop flows through each energy storage module; each passage is used to circulate the working medium, and the working medium is used to drive the heat to flow in each passage. The energy storage system coupled with industrial waste heat provided in this application can store the heat in the working medium more thoroughly by setting a waste heat utilization unit in the waste heat channel of the industrial system and setting multiple stages of energy storage modules, thereby avoiding the waste of industrial waste heat.

[0004] It can be seen that the existing technology has the problem of low heat transfer performance in the heat exchange process due to inaccurate control of the heat exchange process of the high-temperature waste heat medium generated in the industry. Summary of the Invention

[0005] Therefore, the present invention provides an industrial waste heat energy storage system based on geothermal energy storage to overcome the problem of low heat transfer performance in the heat exchange process due to inaccurate control of the heat exchange process of the high-temperature waste heat medium generated in the industry in the existing technology.

[0006] To achieve the above object, the present invention provides an industrial waste heat energy storage system based on geothermal energy storage, including:

[0007] A waste heat recovery mechanism, which includes a medium transmission pipeline for recovering the high-temperature waste heat medium generated in the industrial process and a filter screen arranged inside and connected to the transmission pipeline for filtering the high-temperature waste heat medium;

[0008] A heat energy exchange mechanism, which includes a heat exchanger arranged below the medium transmission pipeline and connected to the medium transmission pipeline for heat-exchanging high-temperature waste heat medium with water, a waste bin arranged below the heat exchanger for receiving the cooled medium after heat exchange, and a first water supply pipeline arranged below the heat exchanger and connected to the heat exchanger for conveying high-temperature water. The heat exchanger includes a medium inlet, a water inlet, a medium outlet, and a water outlet;

[0009] A water supply mechanism, which includes a water storage tank arranged on the right side of the heat exchanger for storing water, an electric heater arranged at the bottom inside the water storage tank and connected to the water storage tank for heating water, and a water transmission pipeline arranged on the left side of the water storage tank and connected to the water storage tank for transmitting water;

[0010] A heat energy storage mechanism, which includes a heat storage layer arranged below the first water supply pipeline for storing heat energy and a second water supply pipeline arranged on the right side of the heat storage layer and connected to the heat storage layer for conveying high-temperature water;

[0011] A control mechanism, which is respectively connected to the waste heat recovery mechanism, the heat energy exchange mechanism, the water supply mechanism, and the heat energy storage mechanism, and includes:

[0012] A data detection unit, which includes a flow meter arranged at the connection between the water transmission pipeline and the water inlet for detecting the flow rate of the water transmission pipeline, a first temperature sensor arranged at the connection between the first water supply pipeline and the water supply port for detecting the temperature of the high-temperature water after heat exchange, an acoustic ranging instrument arranged above the heat storage layer for detecting the liquid level height of the heat storage layer, and a second temperature sensor arranged at the connection between the second water supply pipeline and the output pipeline;

[0013] A data analysis unit, which is connected to the data detection unit for determining the opening and closing of the valve of the first water supply pipeline according to the temperature of the high-temperature water after heat exchange detected by the first temperature sensor;

[0014] A control unit, which is connected to the data analysis unit for determining to control the opening of the electric heater or increase the power of the heat exchanger according to the analysis result of the data analysis unit and the flow rate of the water transmission pipeline;

[0015] An adjustment unit, which is connected to the control unit for determining the adjustment amount of the industrial waste heat energy storage process parameters according to the difference between the average values of the first temperature sensor and the second temperature sensor and the output efficiency;

[0016] An optimization unit, which is connected to the adjustment unit for determining whether to replace the heat exchanger according to the difference in the change of the liquid level height of the heat storage layer in the same period of different years.

[0017] Further, the data analysis unit determines that the valve of the first water supply pipeline is opened according to the comparison result that the temperature of the high-temperature water after heat exchange is greater than or equal to the preset temperature, and the data analysis unit determines that the valve of the first water supply pipeline is closed according to the comparison result that the temperature of the high-temperature water after heat exchange is less than the preset temperature.

[0018] Further, under the condition that the data analysis unit determines that the valve of the first water supply pipeline is closed, the control unit determines to increase the power of the heat exchanger according to the comparison result that the flow rate of the water supply pipeline is greater than or equal to the preset flow rate, and the control unit determines to turn on the electric heater according to the comparison result that the flow rate of the water supply pipeline is less than the preset flow rate.

[0019] Further, the preset flow rate is determined according to the historical average value of the water flow rate in the water supply pipeline. Increasing the power of the heat exchanger includes increasing the power of the heat exchanger by a compensation coefficient, and the compensation coefficient is proportional to the flow rate of the water supply pipeline.

[0020] Further, the adjustment unit determines the adjustment amount of the parameters of the industrial waste heat energy storage process according to the comparison result of the difference between the average value of the first temperature sensor and the average value of the second temperature sensor and the preset difference, and / or according to the comparison result of the output efficiency and the preset output efficiency;

[0021] Among them, the parameters of the industrial waste heat energy storage process include the thickness of the insulating material and the replacement period of the filter screen.

[0022] Further, the preset difference is determined according to the average value of the first temperature sensor when the valve of the first water supply pipeline is opened, and the preset output efficiency is determined according to the average value of the output efficiency in the historical output process.

[0023] Further, the adjustment amount of the thickness of the insulating material is positively correlated with the difference between the average value of the first temperature sensor and the average value of the second temperature sensor; the adjustment amount of the replacement period of the filter screen is negatively correlated with the change rate of the cleaning period of the heat exchanger within the preset time.

[0024] Further, the change rate of the cleaning period of the heat exchanger within the preset time is determined according to the reduction rate of the cleaning period of the heat exchanger within the preset time.

[0025] Further, the optimization unit determines to replace the heat exchanger according to the comparison result that the difference in the change of the liquid level height is greater than or equal to the preset difference.

[0026] Further, all pipe joints are sealed with sealing materials, and the outsides of the first water supply pipeline and the second water supply pipeline are covered with insulating materials.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention determines whether to open the valve of the first water supply pipeline according to the comparison result between the temperature of the high-temperature water after heat exchange and the preset temperature. If the temperature of the high-temperature water is greater than or equal to the preset temperature, it indicates that the heat energy stored in the high-temperature water is qualified, and it is determined to open the valve of the first water supply pipeline to store the high-temperature water in the heat storage layer for subsequent use. If the temperature of the high-temperature water is less than the preset temperature, it indicates that the heat energy stored in the high-temperature water is unqualified, and it is determined not to open the valve of the first water supply pipeline. By the above method, the accuracy of the heat exchange process control is improved, and the phenomenon of heat energy loss in the heat storage layer caused by the low temperature of the high-temperature water is avoided.

[0028] Further, under the condition that the valve of the first water supply pipeline is determined to be closed, the present invention determines the control of the heat exchanger and the electric heater according to the comparison result between the flow rate of the water supply pipeline and the preset flow rate. If the flow rate is greater than or equal to the preset flow rate, it indicates that the flow rate of the high-temperature water meets the standard but the temperature is low. At this time, it is necessary to increase the power of the heat exchanger to increase the temperature of the high-temperature water after heat exchange. If the flow rate is less than the preset flow rate, it indicates that the temperature of the high-temperature water is low and the flow rate is small. At this time, it indicates that due to the low temperature, partial icing occurs inside the water storage tank, resulting in a small water flow rate in the pipeline. At this time, it is necessary to control the electric heater inside the water storage tank to avoid the water from freezing. By the above method, the accuracy of the industrial waste heat energy storage process control is improved.

[0029] Further, the present invention determines whether to adjust the industrial waste heat energy storage process according to the comparison result between the difference between the temperature of the high-temperature water after heat exchange and the temperature of the high-temperature water when using the high-temperature water and the preset difference. If the difference is greater than or equal to the preset difference, it indicates that there is more heat energy loss during the transportation of the high-temperature water. At this time, it is necessary to increase the thickness of the insulating material wrapped outside the water supply pipeline with the first adjustment coefficient to reduce the heat energy loss during the transportation of the high-temperature water. If the difference is less than the preset difference, at this time, the transportation efficiency of the high-temperature water is analyzed to determine whether to adjust the industrial waste heat energy storage process. By the above method, the accuracy of the industrial waste heat energy storage process control is improved, and the resource utilization rate of the industrial waste heat energy storage is further improved.

[0030] Further, the present invention further analyzes the transmission efficiency of the high-temperature water under the condition that the heat energy stored in the high-temperature water is qualified, so as to avoid the situation that the heat energy stored in the high-temperature water is qualified but the flow rate is small, resulting in the use effect not reaching the target standard when the high-temperature water is called later. By the above method, the accuracy of the industrial waste heat energy storage process control is further improved to reduce resource waste.

[0031] Furthermore, when the transmission efficiency of the present invention is less than the preset transmission efficiency, it indicates that the flow rate of high-temperature water in the pipeline is low. During the waste heat recovery process, the high-temperature waste heat medium contains a large amount of impurities, which causes blockages in the heat exchanger and the filter screen, resulting in a small inflow of the high-temperature waste heat medium and thus a small flow rate of high-temperature water. At this time, it is necessary to adjust the replacement cycle of the filter screen to reduce the impurities in the high-temperature waste heat medium. The present invention calculates the adjustment coefficient of the cleaning cycle of the filter screen based on the change rate of the cleaning cycle of the heat exchanger, avoiding the waste of resources caused by replacing qualified filter screens due to pipeline blockages, and improving the accuracy of the control of the industrial waste heat energy storage process through the above method.

[0032] Furthermore, the present invention further analyzes the performance of the heat exchanger based on the difference in the change of the liquid level height of the heat storage layer after the adjustment of the industrial waste heat energy storage process. If the difference is greater than or equal to the preset difference, it indicates that the performance of the heat exchanger has decreased due to the long service time, resulting in a reduction in the generated high-temperature water. At this time, it is necessary to replace the heat exchanger. Through the above method, the accuracy of the control of the industrial waste heat energy storage process is improved, and the resource utilization efficiency is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of an industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention;

[0034] Figure 2 is a schematic structural diagram of a control mechanism of an industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention;

[0035] Figure 3 is a working flowchart for determining the opening and closing of the first water supply pipeline valve in an industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention;

[0036] In the figure, 1 - filter screen, 2 - medium transmission pipeline, 3 - medium inlet, 4 - water inlet, 5 - water transmission pipeline, 6 - heat exchanger, 7 - medium outlet, 8 - waste bin, 9 - water outlet, 10 - water storage tank, 11 - first water supply pipeline, 12 - heat storage layer, 13 - second water supply pipeline, 14 - acoustic ranging device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0039] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0040] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] Please refer to Figures 1 - 3 as shown Figure 1 which is a schematic structural diagram of the industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention; Figure 2 which is a schematic structural diagram of the control mechanism of the industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention; Figure 3 which is a working flow chart for determining the opening and closing of the valve of the first water supply pipeline in the industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention.

[0042] The industrial waste heat energy storage system based on geothermal energy storage according to an embodiment of the present invention includes:

[0043] A waste heat recovery mechanism, which includes a medium transmission pipeline 2 for recovering the high-temperature waste heat medium generated in the industrial process and a filter screen 1 disposed inside the transmission pipeline and connected to the transmission pipeline for filtering the high-temperature waste heat medium;

[0044] A heat energy exchange mechanism, which includes a heat exchanger 6 disposed below the medium transmission pipeline and connected to the medium transmission pipeline for exchanging heat between the high-temperature waste heat medium and water, a waste material box 8 disposed below the heat exchanger for receiving the cooled medium after heat exchange, and a first water supply pipeline 11 disposed below the heat exchanger and connected to the heat exchanger for transporting high-temperature water. The heat exchanger includes a medium inlet 3, a water inlet 4, a medium outlet 7, and a water outlet 9;

[0045] A water supply mechanism, which includes a water storage tank 10 disposed on the right side of the heat exchanger for storing water, an electric heater (not shown in the figure) disposed at the bottom inside the water storage tank and connected to the water storage tank for heating water, and a water transmission pipeline 5 disposed on the left side of the water storage tank and connected to the water storage tank for transmitting water;

[0046] A thermal energy storage mechanism, which includes a heat storage layer 12 arranged below the first water supply pipeline for storing thermal energy and a second water supply pipeline 13 arranged on the right side of the heat storage layer and connected to the heat storage layer for transporting high-temperature water;

[0047] A control mechanism, which is respectively connected to the waste heat recovery mechanism, the heat energy exchange mechanism, the water supply mechanism and the thermal energy storage mechanism, and includes:

[0048] A data detection unit, which includes a flow meter (not shown in the figure) arranged at the connection of the water supply pipeline and the water inlet for detecting the flow of the water supply pipeline, a first temperature sensor (not shown in the figure) arranged at the connection of the first water supply pipeline and the water supply port for detecting the temperature of the high-temperature water after heat exchange, an acoustic ranging instrument 14 arranged above the heat storage layer for detecting the liquid level height of the heat storage layer, and a second temperature sensor (not shown in the figure) arranged at the connection of the second water supply pipeline and the output pipeline (not shown in the figure);

[0049] A data analysis unit, which is connected to the data detection unit for determining the opening and closing of the valve of the first water supply pipeline according to the temperature of the high-temperature water after heat exchange detected by the first temperature sensor;

[0050] A control unit, which is connected to the data analysis unit for determining to control the opening of the electric heater or increase the power of the heat exchanger according to the analysis result of the data analysis unit and the flow of the water supply pipeline;

[0051] An adjustment unit, which is connected to the control unit for determining the adjustment amount of the industrial waste heat energy storage process parameters according to the difference between the average values of the first temperature sensor and the second temperature sensor and the output efficiency;

[0052] An optimization unit, which is connected to the adjustment unit for determining whether to replace the heat exchanger according to the difference in the change of the liquid level height of the heat storage layer in the same period of different years;

[0053] In the embodiment of the present invention, the connection of the second water supply pipeline and the output pipeline is the connection of the second water supply pipeline and the pipeline to be used. For example, when the second water supply pipeline is used for heating, the connection of the second water supply pipeline and the output pipeline is the connection of the second water supply pipeline and the heating pipeline. The heat storage layer includes but is not limited to "rock formations and heat storage tanks".

[0054] Specifically, the data analysis unit determines the opening and closing of the valve of the first water supply pipeline by comparing the temperature W1 of the high-temperature water after heat exchange with the preset temperature W0;

[0055] If W1≥W0, the data analysis unit determines that the valve of the first water supply pipeline is opened;

[0056] If W1 < W0, the data analysis unit determines that the valve of the first water supply pipeline is closed;

[0057] Wherein, the value range of the preset temperature is set to 70°C to 90°C, and the preferred value of the preset temperature is 80°C. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0058] The present invention determines whether to open the valve of the first water supply pipeline according to the comparison result between the temperature of the high-temperature water after heat exchange and the preset temperature. If the temperature of the high-temperature water is greater than or equal to the preset temperature, it indicates that the heat energy stored in the high-temperature water is qualified, and it is determined to open the valve of the first water supply pipeline to store the high-temperature water in the heat storage layer for subsequent use. If the temperature of the high-temperature water is less than the preset temperature, it indicates that the heat energy stored in the high-temperature water is unqualified, and it is determined not to open the valve of the first water supply pipeline. Through the above method, the accuracy of the heat exchange process control is improved, and the phenomenon of heat energy loss in the heat storage layer caused by the low temperature of the high-temperature water is avoided.

[0059] Specifically, under the condition that the data analysis unit determines that the valve of the first water supply pipeline is closed, the control unit determines the control of the heat exchanger and the electric heater according to the comparison result between the flow rate D of the water supply pipeline and the preset flow rate D0;

[0060] If D ≥ D0, the control unit determines to increase the power of the heat exchanger;

[0061] If D < D0, the control unit determines to control the electric heater to be turned on;

[0062] Wherein, the value of the preset flow rate D0 is the historical average value of the flow rate of water transported by the water supply pipeline. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0063] Specifically, under the condition that the control unit determines to increase the power of the heat exchanger, the control unit determines to increase the power Z of the heat exchanger by a compensation coefficient R. The compensation coefficient R is calculated by the following formula:

[0064]

[0065] The compensated power Z' of the pre-heat exchanger is set to Z' = R × Z.

[0066] Under the condition that it is determined that the valve of the first water supply pipeline is closed, the control of the heat exchanger and the electric heater is determined according to the comparison result between the flow rate of the water conveyance pipeline and the preset flow rate. If the flow rate is greater than or equal to the preset flow rate, it indicates that the flow rate of the high-temperature water meets the standard but the temperature is low. At this time, it is necessary to increase the power of the heat exchanger to increase the temperature of the high-temperature water after heat exchange. If the flow rate is less than the preset flow rate, it indicates that the temperature of the high-temperature water is low and the flow rate is small. At this time, it indicates that due to the low temperature, partial icing occurs inside the water storage tank, resulting in a small water flow rate in the pipeline. At this time, it is necessary to control the electric heater inside the water storage tank to avoid water icing. Through the above method, the accuracy of the control of the industrial waste heat energy storage process is improved.

[0067] Specifically, the adjustment amount of the parameters in the industrial waste heat energy storage process determined by the adjustment unit includes:

[0068] The adjustment unit determines the adjustment amount of the thickness of the insulating material in the industrial waste heat energy storage process according to the first comparison result between the difference ΔW between the average value of the first temperature sensor and the average value of the second temperature sensor and the preset difference ΔW0;

[0069] The adjustment unit determines the adjustment amount of the replacement cycle of the filter screen in the industrial waste heat energy storage process according to the second comparison result between the difference between the average value of the first temperature sensor and the average value of the second temperature sensor and the preset difference and according to the first comparison result between the output efficiency S and the preset output efficiency S0;

[0070] In a specific embodiment, it is set that:

[0071] ΔW≥ΔW0 is the first comparison result between the difference between the average value of the first temperature sensor and the average value of the second temperature sensor and the preset difference;

[0072] ΔW<ΔW0 is the second comparison result between the difference between the average value of the first temperature sensor and the average value of the second temperature sensor and the preset difference;

[0073] S<S0 is the first comparison result between the output efficiency and the preset output efficiency;

[0074] S≥S0 is the second comparison result between the output efficiency and the preset output efficiency;

[0075] Among them, the preset difference is one-tenth of the average value of the first temperature sensor when the valve of the first water supply pipeline is opened, and the preset output efficiency is the average value of the output efficiency in the historical output process. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0076] The present invention determines whether to adjust the industrial waste heat energy storage process based on the comparison result between the difference between the temperature of high-temperature water after heat exchange and the temperature of high-temperature water during the use of the high-temperature water and a preset difference. If the difference is greater than or equal to the preset difference, it indicates that there is a large heat energy loss during the transportation of high-temperature water. At this time, it is necessary to increase the thickness of the insulating material wrapped outside the water delivery pipe by a first adjustment coefficient to reduce the heat energy loss during the transmission of high-temperature water. If the difference is less than the preset difference, the transportation efficiency of high-temperature water is analyzed at this time to determine whether to adjust the industrial waste heat energy storage process. Through the above method, the accuracy of controlling the industrial waste heat energy storage process is improved, and thus the resource utilization rate of industrial waste heat energy storage is increased.

[0077] Specifically, in a specific embodiment, if ΔW≥ΔW0, the adjustment unit determines to adjust the thickness of the insulating material;

[0078] If ΔW<ΔW0, the adjustment unit makes a secondary determination on the adjustment amount of the parameters of the industrial waste heat energy storage process.

[0079] Specifically, under the condition that the adjustment unit makes a secondary determination on the adjustment amount of the parameters of the industrial waste heat energy storage process, the adjustment unit determines the adjustment amount of the parameters of the industrial waste heat energy storage process according to the comparison result between the output efficiency S and the preset output efficiency S0;

[0080] If S<S0, the adjustment unit determines to adjust the replacement cycle of the filter screen;

[0081] If S≥S0, the adjustment unit determines that there is no need to adjust the parameters of the industrial waste heat energy storage process.

[0082] The present invention further analyzes the transmission efficiency of high-temperature water under the condition that the heat energy stored in the high-temperature water is qualified, avoiding the situation that the usage effect fails to reach the target standard when the heat energy stored in the high-temperature water is qualified but the flow rate is small. Through the above method, the accuracy of controlling the industrial waste heat energy storage process is further improved to reduce resource waste.

[0083] Specifically, under the condition that the adjustment unit determines to adjust the thickness of the insulating material, the adjustment unit determines to adjust the thickness M of the insulating material by a first adjustment coefficient K1, and the adjusted thickness M' of the insulating material = K1×M;

[0084] Under the condition that the adjustment unit determines to adjust the replacement cycle of the filter screen, the adjustment unit determines to adjust the replacement cycle Y of the filter screen by a second adjustment coefficient K2, and the adjusted replacement cycle Y' of the filter screen = K2×Y.

[0085] Specifically, the first adjustment coefficient K1 is calculated by the following formula, set:

[0086] K1=1+log2 ΔW - ΔW0 + 1.2;

[0087] The second adjustment coefficient K2 is calculated by the following formula and set as:

[0088] K2 = log 2 G - G0 + 1.2;

[0089] Wherein, G represents the change rate of the heat exchanger cleaning cycle, G0 represents the preset change rate, the value range of the preset change rate is set to 0.1 - 0.3, the value of the preset change rate is preferably 0.2, but the above values are not limited thereto, and those skilled in the art can also adjust the value according to actual needs.

[0090] In the embodiment of the present invention, the change rate of the heat exchanger cleaning cycle is determined by the ratio of the difference between the heat exchanger cleaning cycle and the previous cleaning cycle to the previous cleaning cycle. For example, if the previous cleaning cycle of the heat exchanger is 30 days and the current cleaning cycle of the heat exchanger is 24 days, then the change rate of the heat exchanger cleaning cycle is 0.2. The cleaning cycle is the time interval between the previous cleaning time and the next cleaning time of the heat exchanger.

[0091] Under the condition that the transmission efficiency of the present invention is less than the preset transmission efficiency, it indicates that the flow rate of high-temperature water in the pipeline is low. Because there are many impurities in the high-temperature waste heat medium during the waste heat recovery process, the heat exchanger and the filter screen are blocked, resulting in a small inflow of the high-temperature waste heat medium and thus a small flow rate of the high-temperature water. At this time, it is necessary to adjust the replacement cycle of the filter screen to reduce the impurities in the high-temperature waste heat medium. The present invention calculates the adjustment coefficient of the filter screen cleaning cycle according to the change rate of the heat exchanger cleaning cycle, avoiding the phenomenon of resource waste caused by replacing qualified filter screens due to pipeline blockage, and improving the accuracy of the industrial waste heat energy storage process control through the above method.

[0092] Specifically, the optimization unit determines whether to replace the heat exchanger according to the comparison result of the difference amount H of the liquid level height change of the heat storage layer after the industrial waste heat energy storage process is adjusted and the preset difference amount H0;

[0093] If H ≥ H0, the optimization unit determines to replace the heat exchanger;

[0094] If H < H0, the optimization unit determines not to replace the heat exchanger;

[0095] Wherein, the value of the preset difference amount H0 is the historical average value of the difference amount of the liquid level height change of the heat storage layer, but the above values are not limited thereto, and those skilled in the art can also adjust the value according to actual needs.

[0096] In the embodiment of the present invention, the difference in the liquid level height change of the heat storage layer is the difference between the maximum and minimum liquid level heights of the heat storage layer within a preset time. However, the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0097] The present invention further analyzes the performance of the heat exchanger based on the difference in the liquid level height change of the heat storage layer adjusted during the industrial waste heat energy storage process. If the difference is greater than or equal to the preset difference, it indicates that the performance of the heat exchanger has decreased due to the long service time, resulting in a reduction in the generated high-temperature water. At this time, the heat exchanger needs to be replaced. By the above method, the accuracy of the control of the industrial waste heat energy storage process is improved, thereby improving the resource utilization efficiency.

[0098] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0099] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial waste heat energy storage system based on geothermal energy storage, characterized in that: include: A waste heat recovery mechanism, comprising a medium transmission pipeline for recovering high-temperature waste heat medium generated by an industrial process and a filter screen disposed inside the transmission pipeline and connected to the transmission pipeline for filtering the high-temperature waste heat medium; A heat exchange mechanism, comprising a heat exchanger disposed below a medium transmission pipeline and connected to the medium transmission pipeline for heat exchange between a high-temperature waste heat medium and water, a waste box disposed below the heat exchanger for receiving the cooling medium after heat exchange, and a first water delivery pipeline disposed below the heat exchanger and connected to the heat exchanger for delivering high-temperature water, wherein the heat exchanger comprises a medium inlet, a water inlet, a medium outlet, and a water outlet; The water supply mechanism includes a water storage tank disposed on the right side of the heat exchanger for storing water, an electric heater disposed at the bottom of the water storage tank and connected to the water storage tank for heating water, and a water delivery pipeline disposed on the left side of the water storage tank and connected to the water storage tank for transmitting water; A heat energy storage mechanism, comprising a heat storage layer disposed below the first water delivery pipeline for storing heat energy and a second water delivery pipeline disposed on the right side of the heat storage layer and connected to the heat storage layer for delivering high-temperature water; A control mechanism, which is respectively connected to the waste heat recovery mechanism, the heat energy exchange mechanism, the water supply mechanism and the heat energy storage mechanism, and includes: A data detection unit, comprising a first temperature sensor disposed at the connection between the water delivery pipeline and the water inlet for detecting the flow rate of the water delivery pipeline, disposed at the connection between the first water delivery pipeline and the water delivery outlet for detecting the temperature of the high-temperature water after heat exchange, an acoustic wave range finder disposed above the heat storage layer for detecting the liquid level of the heat storage layer, and a second temperature sensor disposed at the connection between the second water delivery pipeline and the output pipeline; A data analysis unit connected to the data detection unit, for determining the opening and closing of the first water supply pipeline valve according to the temperature of the high-temperature water after heat exchange detected by the first temperature sensor; A control unit connected to the data analysis unit, for determining and controlling to start the electric heater or increase the power of the heat exchanger according to the analysis result of the data analysis unit and the flow rate of the water pipeline; An adjustment unit connected to the control unit, for determining an adjustment amount of the industrial waste heat energy storage process parameter according to a difference between an average value of the first temperature sensor and an average value of the second temperature sensor and an output efficiency; The optimization unit is connected to the adjustment unit and is used to determine whether to replace the heat exchanger according to the difference in the change of the liquid level height of the heat storage layer in the same period of different years.

2. The industrial waste heat energy storage system based on geothermal energy storage according to claim 1 is characterized in that: The data analysis unit determines that the valve of the first water supply pipe is opened based on the comparison result that the temperature of the high-temperature water after the heat exchange is greater than or equal to the preset temperature, and the data analysis unit determines that the valve of the first water supply pipe is closed based on the comparison result that the temperature of the high-temperature water after the heat exchange is less than the preset temperature.

3. The industrial waste heat energy storage system based on geothermal energy storage according to claim 2 is characterized in that: Under the condition that the data analysis unit determines that the valve of the first water supply pipe is closed, the control unit determines to control increasing the power of the heat exchanger according to the comparison result that the flow rate of the water supply pipe is greater than or equal to the preset flow rate, and the control unit determines to control turning on the electric heater according to the comparison result that the flow rate of the water supply pipe is less than the preset flow rate.

4. The industrial waste heat energy storage system based on geothermal energy storage according to claim 3 is characterized in that: The preset flow rate is determined based on the historical average flow rate of water transported by the water pipeline, and the control of increasing the power of the heat exchanger includes increasing the power of the heat exchanger by a compensation coefficient, and the compensation coefficient is proportional to the flow rate of the water pipeline.

5. The industrial waste heat energy storage system based on geothermal energy storage according to claim 4 is characterized in that: The adjustment unit determines the adjustment amount of the parameters of the industrial waste heat energy storage process according to a comparison result of a difference between an average value of the first temperature sensor and an average value of the second temperature sensor and a preset difference, and / or according to a comparison result of an output efficiency and a preset output efficiency; The parameters of the industrial waste heat energy storage process include the thickness of the insulating material and the replacement cycle of the filter.

6. The industrial waste heat energy storage system based on geothermal energy storage according to claim 5 is characterized in that: The preset difference is determined based on an average value of the first temperature sensor when the valve of the first water supply pipeline is opened, and the preset output efficiency is determined based on an average value of the output efficiency during the historical output process.

7. The industrial waste heat energy storage system based on geothermal energy storage according to claim 6 is characterized in that: The adjustment amount of the thickness of the insulating material is positively correlated with the difference between the average value of the first temperature sensor and the average value of the second temperature sensor; the adjustment amount of the filter replacement cycle is negatively correlated with the change rate of the heat exchanger cleaning cycle within a preset time.

8. The industrial waste heat energy storage system based on geothermal energy storage according to claim 7 is characterized in that: The change rate of the cleaning cycle of the heat exchanger within the preset time is determined according to the reduction rate of the cleaning cycle of the heat exchanger within the preset time.

9. The industrial waste heat energy storage system based on geothermal energy storage according to claim 8 is characterized in that: The optimization unit determines to replace the heat exchanger according to the comparison result that the difference in the liquid level height change is greater than or equal to the preset difference.

10. The industrial waste heat energy storage system based on geothermal energy storage according to claim 1, characterized in that: The pipe connections are all sealed with sealing materials, and the first water supply pipe and the second water supply pipe are covered with insulating materials on the outside.

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