Intelligent management system based on multi-energy linkage

Abstract

The invention relates to the field of factory energy conversion, in particular to an intelligent management system based on multi-energy linkage, and the system comprises a heat energy collection module which is used for collecting hot wastewater discharged by a chemical plant; the heat energy increasing module is used for converting the initial heat conduction oil into target heat conduction oil; the heat energy transfer module is used for transferring the heat energy of the target heat conduction oil to heating water in real time; and the control module is used for monitoring and controlling operation parameters of the whole system, judging the conversion efficiency according to the heat energy recovery conversion efficiency, and determining an efficiency processing mode according to a judgment result of the conversion efficiency. Reasonable development and utilization of the hot wastewater discharged by the chemical plant are realized, the energy utilization efficiency is improved, and energy consumption and environmental pollution are reduced.

Description

Technical Field

[0001] The present invention relates to the field of factory energy conversion, and in particular to an intelligent management system based on multi-energy linkage. Background Art

[0002] In actual factory production, a large amount of low-grade thermal energy is generated, for example, hot exhaust gas and hot water discharged by pharmaceutical factories, and the heat collected by solar water heaters at low temperatures is also low-grade thermal energy; there are also relatively low-temperature parts of geothermal resources, etc. Due to the temperature and thermal energy density limitations of low-grade thermal energy, direct use is often inefficient and costly. However, with the development of technology, the rational development and utilization of low-grade thermal energy is currently an important topic, and how to improve energy utilization efficiency, reduce energy consumption and environmental pollution needs to be solved urgently.

[0003] Chinese patent publication number: CN110372142A discloses a device for treating wastewater using low-grade flue gas. The device is provided with a dust removal unit, an economizer and a desulfurization unit connected in sequence, and also includes a first heat exchanger, a flash tank and a filter press device. The first heat exchanger is used to recover the waste heat of the flue gas, improve the dust removal capacity of the dust removal unit and reduce the process water replenishment of the desulfurization unit. At the same time, the heat recovered from the flue gas is used to increase the temperature of the desulfurization wastewater. The wastewater after heating is flashed in the flash tank, thereby realizing the concentration of the desulfurization wastewater. The flash tank is in a negative pressure state, and the recovered flue gas heat is taken out with the concentrated wastewater and secondary steam. The heat contained in the concentrated wastewater and the condensed secondary steam is recovered by the low-grade condensate, and finally the heat is returned to the low-grade condensate system, realizing the cascade utilization of heat energy. At the same time, the filter press device effectively treats the desulfurization wastewater; it can be seen that the device for treating wastewater using low-grade flue gas has the problem of not being able to improve the energy utilization efficiency of hot wastewater in chemical plants, reduce energy consumption and environmental pollution. Summary of the invention

[0004] To this end, the present invention provides an intelligent management system based on multi-energy linkage to overcome the problem of low utilization rate of thermal wastewater from chemical plants in the prior art, improve energy utilization efficiency, and reduce energy consumption and environmental pollution.

[0005] To achieve the above objectives, the present invention provides an intelligent management system based on multi-energy linkage, comprising:

[0006] A heat energy collection module, which collects the heat energy of the hot waste water by transferring the heat energy of the hot waste water to the initial heat transfer oil;

[0007] A heat energy enhancement module, which is connected to the heat energy collection module and is used to enhance the heat energy of the initial heat transfer oil to output a target heat transfer oil, including a heat compressor that compresses the initial heat transfer oil to increase the temperature;

[0008] A heat transfer module, which is connected to the heat energy enhancement module, and includes a heat exchange unit for transferring the heat energy of the target heat transfer oil to the heating water, a circulation unit connected to the heat exchange unit for circulating and heating the target heat transfer oil after the heat exchange, and a delivery pump for controlling the flow direction of the heating water;

[0009] A control module, which is respectively connected to the heat collection module, the heat enhancement module and the heat transfer module, and is used to determine the accuracy of the recovery conversion process according to the heat recovery conversion efficiency and adjust the flow rate of the initial heat transfer oil entering the heat compressor, and determine the heat exchange heat energy loss processing method according to the accuracy determination result and the air temperature of the heat exchange area;

[0010] The heat exchange heat energy loss processing method includes adjusting the circulation rate of the target heat transfer oil or adjusting the start and stop rate of the target heat transfer oil delivery pump according to the actual delivery rate of the target heat transfer oil.

[0011] Furthermore, the thermal energy collection module comprises:

[0012] Hot wastewater storage tanks are used to store hot wastewater discharged from chemical plants;

[0013] a first temperature sensor, which is arranged on the inner wall of the hot wastewater storage tank and is used to detect the temperature of the hot wastewater;

[0014] a first delivery pipeline connected to the hot wastewater storage tank and used to deliver the hot wastewater to a heat exchange location;

[0015] A first plate heat exchanger connected to the first delivery pipeline for transferring the heat energy of the hot wastewater to the initial heat transfer oil;

[0016] a drain pipe connected to the first plate heat exchanger and used to transport the hot wastewater after heat exchange to a wastewater treatment device;

[0017] A sixth temperature sensor is arranged on the inner wall of the drain pipe to detect the temperature of the hot waste water after heat exchange.

[0018] Furthermore, the thermal energy enhancement module also includes:

[0019] a second delivery pipeline connected to the first plate heat exchanger and used for delivering the initial heat transfer oil to the thermal compressor;

[0020] a second temperature sensor, which is arranged on the inner wall of the second delivery pipeline and is used to detect the temperature of the initial heat transfer oil;

[0021] a first control valve, which is arranged on a second delivery pipeline between the first plate heat exchanger and the thermal compressor, and is used to control the flow rate of the initial heat transfer oil delivered from the first plate heat exchanger to the thermal compressor;

[0022] a third delivery pipeline, connected to the second delivery pipeline, for delivering initial heat transfer oil that has not reached the standard temperature to the thermal compressor;

[0023] a fourth delivery pipeline, connected to the thermal compressor, for delivering the target heat transfer oil to the second plate heat exchanger;

[0024] a first circulating pump, which is connected to the third delivery pipeline and the thermal compressor respectively, and is used to circulate the initial heat transfer oil that has not reached the standard temperature after being compressed by the thermal compressor and input it into the thermal compressor to provide power;

[0025] The third temperature sensor is arranged on the inner wall of the fourth delivery pipeline and is used to detect the temperature of the target heat transfer oil.

[0026] Furthermore, the heat exchange unit comprises:

[0027] a heat transfer oil delivery pump connected to the fourth delivery pipeline and used to control the flow rate of the target heat transfer oil delivered by the thermal compressor to the second plate heat exchanger;

[0028] A second plate heat exchanger connected to the fourth delivery pipeline is used to transfer the heat energy of the target heat transfer oil to the heating water before heat exchange to output the heating water after heat exchange and the target heat transfer oil after heat exchange;

[0029] a fourth temperature sensor connected to the second plate heat exchanger and used to detect the air temperature in the heat exchange area;

[0030] a seventh delivery pipeline connected to the second plate heat exchanger and used for delivering the heating water before heat exchange to the second plate heat exchanger;

[0031] an eighth delivery pipeline connected to the second plate heat exchanger and used for delivering the heat-exchanged heating water to a water tank for the heat-exchanged heating water;

[0032] a water pump connected to the seventh delivery pipeline to provide delivery power for the heating water before heat exchange;

[0033] a fifth temperature sensor, which is arranged on the inner wall of the eighth delivery pipe and is used to detect the temperature of the heating water after heat exchange;

[0034] The seventh temperature sensor is arranged on the inner wall of the seventh delivery pipeline and is used to detect the temperature of the heating water before heat exchange.

[0035] Furthermore, the circulation unit comprises:

[0036] a fifth delivery pipeline, which is connected to the first plate heat exchanger and the second plate heat exchanger respectively, and is used to deliver the target heat transfer oil after heat exchange to the first plate heat exchanger;

[0037] a sixth delivery pipeline connected to the fifth delivery pipeline, and used to cooperate with the fifth delivery pipeline to deliver the target heat-conducting oil after heat exchange back to the second plate heat exchanger for circulating heat exchange when the temperature of the target heat-conducting oil after heat exchange is greater than or equal to a preset temperature condition;

[0038] a second circulation pump connected to the fifth delivery pipeline, for re-transmitting the target heat-conducting oil after heat exchange that meets the preset temperature condition to the first plate heat exchanger, and for providing circulation delivery power for the target heat-conducting oil after heat exchange that does not meet the preset temperature condition to perform the circulation heat exchange;

[0039] a second control valve, which is arranged on a sixth delivery pipeline between the second plate heat exchanger and the second circulation pump, and is used to control the circulation delivery flow rate of the target heat transfer oil after the heat exchange during the circulation heat exchange;

[0040] a third control valve, which is arranged on a fifth delivery pipeline between the first plate heat exchanger and the second circulation pump, and is used to control the flow rate of the target heat transfer oil after heat exchange being delivered to the first plate heat exchanger;

[0041] Wherein, the preset temperature condition is that the temperature of the target heat transfer oil after the heat exchange is lower than the standard heat exchange temperature.

[0042] Further, the control module is connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor, respectively, to calculate the heat energy recovery conversion efficiency according to the temperature of the hot waste water collected by the first temperature sensor, the temperature of the initial heat transfer oil detected by the second temperature sensor, the temperature of the target heat transfer oil collected by the third temperature sensor, the temperature of the heating water before the heat exchange collected by the fifth temperature sensor, the temperature of the heating water after the heat exchange collected by the sixth temperature sensor, and the temperature of the waste water after the hot waste water passes through the first plate heat exchanger collected by the seventh temperature sensor;

[0043] The heat recovery conversion efficiency is the ratio of the difference between the heat energy increased from the heating water before heat exchange to the heating water after heat exchange and the heat energy increased from the initial heat transfer oil to the target heat transfer oil to the heat energy reduced after the hot waste water passes through the first plate heat exchanger;

[0044] The calculation formula for the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger is:

[0045] Q1=c1m1(T s2 -T s1 ),

[0046] Among them, Q1 is the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger, c1 is the specific heat capacity of the hot wastewater, m1 is the mass of the hot wastewater, T s2 is the temperature of the hot wastewater after heat exchange, T s1 is the temperature of the hot wastewater;

[0047] The calculation formula for the heat energy added by the heating water before the heat exchange to the heating water after the heat exchange is:

[0048] Q2=c1m2(T g2 -T g1 ),

[0049] Among them, Q2 is the heat energy added by the heating water before heat exchange to the heating water after heat exchange, c1 is the specific heat capacity of the heating water, m2 is the mass of the heating water, T g2 is the temperature of the heating water after heat exchange, T g1 is the temperature of the heating water before heat exchange;

[0050] The calculation formula for the difference in heat energy added when the initial heat transfer oil is changed into the target heat transfer oil and the heat energy reduced after the hot waste water passes through the first plate heat exchanger is:

[0051] Q3=c2m3(T d2 -T d1 ),

[0052] Where Q3 is the difference between the heat energy added by the initial heat transfer oil and the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger, c2 is the specific heat capacity of the heat transfer oil, m3 is the mass of the target heat transfer oil, T d2 is the initial temperature of the heat transfer oil, T d1 is the target temperature of the thermal oil.

[0053] Furthermore, the control module is connected to the thermal compressor to determine that the heat energy recovery conversion efficiency does not meet the requirements when the heat energy recovery conversion efficiency is greater than or equal to a preset first conversion efficiency, reduce the initial flow rate of heat transfer oil entering the thermal compressor from the first plate heat exchanger, and determine that the accuracy of the recovery conversion process does not meet the requirements when the heat energy recovery conversion efficiency is greater than a preset second conversion efficiency.

[0054] Furthermore, the control module is respectively connected to the second circulation pump and the fourth temperature sensor, so as to determine that the degree of heat energy loss in the heat energy recovery conversion process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature, and to reduce the circulation rate of the target heat transfer oil by reducing the rotation speed of the second circulation pump when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature and lower than the preset second air temperature.

[0055] Furthermore, the control module is connected to the thermal oil delivery pump to preliminarily determine that the degree of heat energy loss in the heat energy recovery and delivery process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset second air temperature, and to obtain the actual delivery rate of the target thermal oil. When the actual delivery rate of the target thermal oil is greater than or equal to the preset delivery rate, the start and stop rate of the thermal oil delivery pump is reduced.

[0056] Furthermore, it also includes a display module, which is connected to the control module and is used to display corresponding content based on the data transmitted by the control module.

[0057] Compared with the prior art, the beneficial effects of the present invention lie in that, by setting a thermal energy collection module, a thermal energy enhancement module, a thermal energy transfer module and a control module, the system of the present invention can collect the thermal energy of the hot wastewater in a centralized manner when inputting the hot wastewater of the chemical plant into the recovery and conversion system by setting a thermal energy collection module and transfer the thermal energy in the hot wastewater to the initial heat transfer oil of the heat transfer medium, thereby maximizing the utilization of the thermal energy of the hot wastewater; by setting a conversion module, the heat source in the hot wastewater is converted into the heat source in the heating system, and a circulation unit is set to continuously provide thermal energy to the heating system, thereby improving the recycling rate of the heat source; by setting a heat storage tank to store thermal energy, the rational utilization of low-grade thermal energy is achieved.

[0058] Specifically, the system of the present invention sets a thermal compressor in the thermal energy enhancement module, determines whether the conversion efficiency meets the requirements according to the heat recovery conversion ratio, and reduces the flow of the thermal compressor when it does not meet the requirements. This overcomes the problem that excessive flow may cause poor operation and increase the structural stress of the internal structure of the compressor, thereby causing friction in some structures and increasing the surface area, thereby increasing the loss, thereby improving the stability of the heat source.

[0059] Furthermore, the system of the present invention controls the flow rate and flow direction of the target heat transfer oil by setting a second circulation pump in the circulation module and changing the rotation speed of the circulation pump, thereby adjusting the circulation rate in the circulation heat exchange process, overcoming the heat energy loss caused by the circulation rate not meeting the requirements and improving the utilization rate of the heat source.

[0060] Furthermore, the system of the present invention, by setting a control module, adjusts the circulation rate of the target heat transfer oil or adjusts the start and stop rate of the target heat transfer oil delivery pump according to the actual delivery rate of the target heat transfer oil, and reduces the circulation rate of the target heat transfer oil to overcome the problem of heat loss caused by volatilization of the shell material due to aging of the shell of the second plate heat exchanger, thereby causing the shell structure to become thinner, thereby improving the efficiency of heat energy conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a schematic diagram of the overall structure of an intelligent management system based on multi-energy linkage according to an embodiment of the present invention;

[0062] Figure 2 This is an overall structural block diagram of an intelligent management system based on multi-energy linkage according to an embodiment of the present invention;

[0063] The accompanying drawings are marked as follows: 1-first temperature sensor, 2-hot wastewater storage tank, 3-first delivery pipeline, 4-first control valve, 5-second temperature sensor, 6-thermal compressor, 7-third temperature sensor, 8-thermal oil delivery pump, 9-second control valve, 10-second circulation pump, 11-fourth temperature sensor, 12-second plate heat exchanger, 13-water pump, 14-heating water tank before heat exchange, 15-eighth delivery pipeline, 16-heating water tank after heat exchange, 17-fifth temperature sensor, 18-first circulation pump, 19-third delivery pipeline, 20-second delivery pipeline, 21-first plate heat exchanger, 22-wastewater treatment device, 23-drain pipe, 24-seventh delivery pipeline, 25-fifth delivery pipeline, 26-third control valve, 27-fourth delivery pipeline, 28-sixth delivery pipeline, 29-sixth temperature sensor, 30-seventh temperature sensor. DETAILED DESCRIPTION

[0064] In order to make the objects and advantages of the present invention more clearly understood, the present invention is 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.

[0065] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0066] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in this specification refers to the presence of features, integers, steps, operations, elements / components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements / components. It should be understood that when we refer to a module as being "connected" or "coupled" to another module, it may be directly connected or coupled to the other module, or there may be an intermediate unit. In addition, "connected" or "coupled" used herein may include wireless connection or wireless coupling.

[0067] See also Figure 1 as well as Figure 2 , are respectively an overall structural diagram and an overall structural block diagram of an intelligent management system based on multi-energy linkage according to an embodiment of the present invention. An intelligent management system based on multi-energy linkage according to the present invention comprises:

[0068] A heat energy collection module, which collects the heat energy of the hot waste water by transferring the heat energy of the hot waste water to the initial heat transfer oil;

[0069] A heat energy enhancement module, which is connected to the heat energy collection module and is used to enhance the heat energy of the initial heat transfer oil to output the target heat transfer oil, including a heat compressor 6 that compresses the initial heat transfer oil to increase the temperature;

[0070] A heat transfer module, which is connected to the heat energy enhancement module, and includes a heat exchange unit for transferring the heat energy of the target heat transfer oil to the heating water, a circulation unit connected to the heat exchange unit for circulating and heating the target heat transfer oil after the heat exchange, and a delivery pump for controlling the flow direction of the heating water;

[0071] A control module is connected to the heat collection module, the heat enhancement module and the heat transfer module respectively, and is used to determine the accuracy of the recovery conversion process according to the heat recovery conversion efficiency and adjust the flow rate of the initial heat transfer oil entering the heat compressor 6, and determine the heat exchange heat loss processing method according to the accuracy determination result and the air temperature of the heat exchange area,

[0072] The heat exchange heat energy loss processing method includes adjusting the circulation rate of the target heat transfer oil or adjusting the start and stop rate of the target heat transfer oil delivery pump 8 according to the actual delivery rate of the target heat transfer oil.

[0073] The system of the present invention is provided with a heat energy collection module, a heat energy enhancement module, a heat energy transfer module and a control module. When the hot wastewater of the chemical plant is input into the recovery and conversion system, the heat energy of the hot wastewater is centrally collected by the heat energy collection module and the heat energy in the hot wastewater is transferred to the initial heat transfer oil of the heat transfer medium, thereby maximizing the utilization of the heat energy of the hot wastewater; the heat source in the hot wastewater is converted into the heat source in the heating system by the conversion module, and the circulation unit is provided to continuously provide heat energy to the heating system, thereby improving the recycling rate of the heat source.

[0074] Specifically, the thermal energy collection module includes:

[0075] Hot wastewater storage tank 2, used to store hot wastewater discharged from the chemical plant;

[0076] A first temperature sensor 1, which is arranged on the inner wall of the hot wastewater storage tank 2, and is used to detect the temperature of the hot wastewater;

[0077] A first delivery pipeline 3, which is connected to the hot wastewater storage tank 2 and is used to deliver the hot wastewater to a heat exchange location;

[0078] A first plate heat exchanger 21, which is connected to the first delivery pipeline 3 and is used to transfer the heat energy of the hot wastewater to the initial heat transfer oil;

[0079] a drain pipe 23 connected to the first plate heat exchanger 21 and used to transport the hot wastewater after heat exchange to the wastewater treatment device 22;

[0080] a sixth temperature sensor 29, which is disposed on the inner wall of the drain pipe 23 and is used to detect the temperature of the hot waste water after heat exchange;

[0081] Specifically, the wastewater treatment device 22 may be a pollutant removal device or an aeration filtration device. The treatment method of the hot wastewater after heat collection and the type of the wastewater treatment device 22 are not limited herein.

[0082] Specifically, the thermal energy enhancement module further includes:

[0083] a second delivery pipeline 20, connected to the first plate heat exchanger 21, for delivering the initial heat transfer oil to the thermal compressor 6;

[0084] A second temperature sensor 5, which is arranged on the inner wall of the second delivery pipeline 20, and is used to detect the temperature of the initial heat transfer oil;

[0085] A first control valve 4, which is arranged on the second delivery pipeline 20 between the first plate heat exchanger 21 and the thermal compressor 6, and is used to control the flow rate of the initial heat transfer oil delivered from the first plate heat exchanger 21 to the thermal compressor 6;

[0086] A third delivery pipeline 19, which is connected to the second delivery pipeline 20, and is used to deliver the initial heat transfer oil that has not reached the standard temperature to the thermal compressor 6;

[0087] a fourth delivery pipeline 27, which is connected to the thermal compressor 6 and is used to deliver the target heat transfer oil to the second plate heat exchanger 12;

[0088] A first circulation pump 18, which is connected to the third delivery pipeline 19 and the thermal compressor 6 respectively, and is used to circulate the initial heat transfer oil that has not reached the standard temperature after being compressed by the thermal compressor 6 and input it into the thermal compressor 6 to provide power;

[0089] a third temperature sensor 7, which is arranged on the inner wall of the fourth delivery pipeline 27 and is used to detect the temperature of the target heat transfer oil;

[0090] Preferably, the standard temperature may be in the range of [90°C, 95°C].

[0091] Specifically, the system of the present invention sets a thermal compressor 6 in the thermal energy enhancement module, determines whether the conversion efficiency meets the requirements according to the heat recovery conversion ratio, and reduces the flow rate of the thermal compressor 6 when it does not meet the requirements. This overcomes the problem that excessive flow rate may cause the operation to be not smooth, thereby causing the structural stress of the internal structure of the compressor 6 to increase, thereby causing friction in some structures and increasing the surface area, thereby increasing the loss, and improves the stability of the heat source.

[0092] Specifically, the heat exchange unit comprises:

[0093] A heat transfer oil delivery pump 8, which is connected to the fourth delivery pipeline 27 and is used to control the flow rate of the target heat transfer oil delivered by the thermal compressor 6 to the second plate heat exchanger 12;

[0094] A second plate heat exchanger 12, which is connected to the fourth delivery pipeline 27, and is used to transfer the heat energy of the target heat transfer oil to the heating water before heat exchange to output the heating water after heat exchange and the target heat transfer oil after heat exchange;

[0095] a fourth temperature sensor 11, connected to the second plate heat exchanger 12, for detecting the air temperature in the heat exchange area;

[0096] a seventh delivery pipeline 24, which is connected to the second plate heat exchanger 12 and is used to deliver the heating water before heat exchange to the second plate heat exchanger 12;

[0097] an eighth delivery pipeline 15, which is connected to the second plate heat exchanger 12 and is used to deliver the heat-exchanged heating water to the heat-exchanged heating water tank;

[0098] A water pump 13, which is connected to the seventh delivery pipeline 24, and is used to provide a delivery power for the heating water before the heat exchange;

[0099] a fifth temperature sensor 17, which is arranged on the inner wall of the eighth delivery pipe 15, and is used to detect the temperature of the heating water after heat exchange;

[0100] The seventh temperature sensor 30 is disposed on the inner wall of the seventh delivery pipe 24 to detect the temperature of the heating water before heat exchange.

[0101] Specifically, the circulation unit comprises:

[0102] a fifth delivery pipeline 25, which is connected to the first plate heat exchanger 21 and the second plate heat exchanger 12 respectively, and is used to deliver the target heat transfer oil after heat exchange to the first plate heat exchanger 21;

[0103] A sixth delivery pipeline 28, which is connected to the fifth delivery pipeline 27, and is used to cooperate with the fifth delivery pipeline 25 to deliver the target heat transfer oil after heat exchange back to the second plate heat exchanger 12 for circulating heat exchange when the temperature of the target heat transfer oil after heat exchange is greater than or equal to a preset temperature condition;

[0104] The second circulation pump 10 is connected to the fifth delivery pipeline 25 and connected to the fourth delivery pipeline 27 through the sixth delivery pipeline 28, so as to re-transmit the target heat transfer oil after heat exchange that meets the preset temperature condition to the first plate heat exchanger 21, at which time the second control valve 9 is closed and the third control valve 26 is opened;

[0105] And, providing the target heat transfer oil after heat exchange that does not meet the preset temperature condition with cyclic transmission power for the cyclic heat exchange, at which time the second control valve 9 is opened and the third control valve 26 is closed;

[0106] A second control valve 9, which is arranged on the sixth delivery pipeline 28 between the second plate heat exchanger 12 and the second circulation pump 10, and is used to control the circulation delivery flow rate of the target heat transfer oil after the heat exchange during the circulation heat exchange;

[0107] a third control valve 26, which is disposed on the fifth delivery pipeline 25 between the first plate heat exchanger 21 and the second circulation pump 10, and is used to control the flow rate of the target heat transfer oil after the heat exchange is delivered to the first plate heat exchanger 21;

[0108] Wherein, the preset temperature condition is that the temperature of the target heat transfer oil after the heat exchange is lower than the standard heat exchange temperature.

[0109] Specifically, the system of the present invention controls the flow rate and flow direction of the target heat transfer oil by setting a second circulation pump 10 in the circulation module and changing the rotation speed of the second circulation pump 10, thereby adjusting the circulation rate in the circulation heat exchange process, overcoming the heat energy loss caused by the circulation rate not meeting the requirements, and improving the utilization rate of the heat source.

[0110] Specifically, the control module is respectively connected to the first temperature sensor 1, the second temperature sensor 5, the third temperature sensor 7, the fifth temperature sensor 17, the sixth temperature sensor 29 and the seventh temperature sensor 30, and is used to calculate the heat energy recovery conversion efficiency according to the temperature of the hot waste water collected by the first temperature sensor, the temperature of the initial heat transfer oil detected by the second temperature sensor 5, the temperature of the target heat transfer oil collected by the third temperature sensor 7, the temperature of the heating water before the heat exchange collected by the fifth temperature sensor 17, the temperature of the heating water after the heat exchange collected by the sixth temperature sensor 29, and the temperature of the waste water after the hot waste water passes through the first plate heat exchanger 21 collected by the seventh temperature sensor 30;

[0111] The heat recovery conversion efficiency is the ratio of the difference between the heat energy increased from the heating water before heat exchange to the heating water after heat exchange and the heat energy increased from the initial heat transfer oil to the target heat transfer oil to the heat energy reduced after the hot waste water passes through the first plate heat exchanger 21;

[0112] The calculation formula for the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger 21 is:

[0113] Q1=c1m1(T s2 -T s1 ),

[0114] Among them, Q1 is the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger 21, c1 is the specific heat capacity of the hot wastewater, m1 is the mass of the hot wastewater, T s2 is the temperature of the hot wastewater after heat exchange, T s1 is the temperature of the hot wastewater;

[0115] The calculation formula for the heat energy added by the heating water before the heat exchange to the heating water after the heat exchange is:

[0116] Q2=c1m2(T g2 -T g1 ),

[0117] Among them, Q2 is the heat energy added by the heating water before heat exchange to the heating water after heat exchange, c1 is the specific heat capacity of the heating water, m2 is the mass of the heating water, T g2 is the temperature of the heating water after heat exchange, T g1 is the temperature of the heating water before heat exchange;

[0118] The calculation formula for the difference in heat energy added when the initial heat transfer oil is changed into the target heat transfer oil and the heat energy reduced after the hot waste water passes through the first plate heat exchanger is:

[0119] Q3=c2m3(T d2 -T d1 );

[0120] Where Q3 is the difference between the heat energy added by the initial heat transfer oil and the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger, c2 is the specific heat capacity of the heat transfer oil, m3 is the mass of the target heat transfer oil, T d2 is the initial temperature of the heat transfer oil, T d1 is the target temperature of the heat transfer oil;

[0121] Among them, the specific heat capacity of hot waste water is the ratio of the thermal energy of hot waste water to the product of the mass of hot waste water and the temperature change of hot waste water, the specific heat capacity of heating water is the ratio of the thermal energy of heating water to the product of the mass of heating water and the temperature change of heating water, and the specific heat capacity of heat transfer oil is the ratio of the thermal energy of heat transfer oil to the product of the mass of heat transfer oil and the temperature change of heat transfer oil;

[0122] Among them, the mass of hot waste water and the mass of heat transfer oil are measured by weighing sensors, and the mass of heating water is the product of the volume of heating water and the density of water.

[0123] Specifically, the control module is connected to the thermal compressor 6, and is used to determine that the heat energy recovery conversion efficiency does not meet the requirements when the heat energy recovery conversion efficiency is greater than or equal to the preset first conversion efficiency, reduce the initial flow rate of the heat transfer oil entering the thermal compressor 6 from the first plate heat exchanger 21, and determine that the accuracy of the recovery conversion process does not meet the requirements when the heat energy recovery conversion efficiency is greater than the preset second conversion efficiency.

[0124] Optionally, the preset value range of the first conversion efficiency may be [85%, 90%], and the preset value range of the second conversion efficiency may be (90%, 95%];

[0125] Preferably, the preferred embodiment of the preset first conversion efficiency is 87%, and the preferred embodiment of the preset second conversion efficiency is 93%;

[0126] In implementation, every time the heat energy recovery conversion efficiency decreases by 2% compared with the first conversion efficiency, the flow rate of the initial heat transfer oil input into the heat compressor 6 is reduced to 0.9 times the current flow rate of the initial heat transfer oil input. Every time the heat energy recovery conversion efficiency decreases by 0.5% compared with the first conversion efficiency, the flow rate of the initial heat transfer oil input into the heat compressor 6 is reduced by 0.2 L / min compared with the current flow rate of the initial heat transfer oil input.

[0127] For example, in one possible embodiment, the conversion efficiency of heat recovery is 85%, which is less than the preset second conversion efficiency, and it is determined that the conversion process is abnormal; the flow rate of the initial heat transfer oil input into the original heat compressor 6 is 10L / min, and the flow rate of the initial heat transfer oil input into the heat compressor 6 becomes: 10×0.9 (87％-85％) / 2％ =9L / min;

[0128] For another example, in a possible embodiment, the conversion efficiency of heat energy recovery is 86.5%, which is less than the preset second conversion efficiency, and it is determined that there is an abnormality in the conversion process; the flow rate of the initial heat transfer oil input into the original thermocompressor 6 is 10L / min, and the flow rate of the initial heat transfer oil input into the thermocompressor 6 becomes: 10-[(87%-86.5%) / 0.5%]×0.2=9.8L / min.

[0129] Specifically, the control module is respectively connected to the second circulation pump 10 and the fourth temperature sensor 11, so as to determine that the degree of heat energy loss in the heat energy recovery conversion process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature, and when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature and lower than the preset second air temperature, the circulation rate of the target heat transfer oil is reduced by reducing the rotation speed of the second circulation pump 10.

[0130] Optionally, the preset first air temperature may be in a value range of [0°C, 7°C], and the preset second air temperature may be in a value range of [8°C, 12°C];

[0131] Preferably, the preferred embodiment of the preset first air temperature is 5°C, and the preferred embodiment of the preset second air temperature is 10°C;

[0132] In one or more possible embodiments, the air temperature in the heat exchange area is 13°C, which is greater than the preset first air temperature. It is preliminarily determined that the degree of heat energy loss in the heat energy recovery conversion process does not meet the requirements; every time the air temperature in the heat exchange area exceeds the value of the first air temperature by 2°C, the speed of the second circulation pump 10 is reduced to 0.95 times the current speed of the second circulation pump 10. At this time, the speed of the second circulation pump 10 is 2900r / min, and the speed of the second circulation pump 10 becomes: 2900×0.95 (13-5) / 2 =2362r / min.

[0133] Specifically, the control module is connected to the thermal oil delivery pump 8, and is used to preliminarily determine that the degree of heat energy loss in the heat energy recovery and delivery process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset second air temperature, and to obtain the actual delivery rate of the target thermal oil. When the actual delivery rate of the target thermal oil is greater than or equal to the preset delivery rate, the start and stop rate of the thermal oil delivery pump 8 is reduced.

[0134] Optionally, the preset delivery rate may be in the range of [12 L / min, 14 L / min];

[0135] Preferably, the preferred embodiment of the preset delivery rate is 13 L / min;

[0136] In one or more possible embodiments, the air temperature in the heat exchange area is 3°C, which is greater than the preset second air temperature. It is determined that the degree of heat energy loss in the heat recovery and transportation process does not meet the requirements. The target heat transfer oil delivery rate is 15L / min, which is greater than the preset delivery rate. For every 2L / min that the target heat transfer oil delivery rate exceeds the preset delivery rate, the start and stop rate of the heat transfer oil delivery pump 8 is reduced by 1 minute; the original start and stop rate of the heat transfer oil delivery pump 8 is 6 minutes, and the start and stop rate of the heat transfer oil delivery pump 8 becomes: 6-(15-13) / 2=5 minutes.

[0137] Specifically, the system of the present invention sets a control module, adjusts the circulation rate of the target heat transfer oil or adjusts the start and stop rate of the target heat transfer oil delivery pump 8 according to the actual delivery rate of the target heat transfer oil, and reduces the circulation rate of the target heat transfer oil to overcome the problem of heat loss caused by volatilization of the shell material due to aging of the shell of the second plate heat exchanger, thereby causing the shell structure to become thinner, thereby improving the efficiency of heat energy conversion.

[0138] Specifically, it also includes a display module, which is connected to the control module and is used to display corresponding content based on the data transmitted by the control module.

[0139] In actual situations, the display module may be a display screen for displaying several determination results of the control module, which will not be described in detail.

[0140] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying 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.

Claims

1. An intelligent management system based on multi-energy linkage, characterized in that: include: A heat energy collection module, which collects the heat energy of the hot waste water by transferring the heat energy of the hot waste water to the initial heat transfer oil; A heat energy enhancement module, which is connected to the heat energy collection module and is used to enhance the heat energy of the initial heat transfer oil to output a target heat transfer oil, including a heat compressor that compresses the initial heat transfer oil to increase the temperature; A heat transfer module, which is connected to the heat energy enhancement module, and includes a heat exchange unit for transferring the heat energy of the target heat transfer oil to the heating water, a circulation unit connected to the heat exchange unit for circulating and heating the target heat transfer oil after the heat exchange, and a delivery pump for controlling the flow direction of the heating water; A control module is connected to the heat collection module, the heat enhancement module and the heat transfer module respectively, and is used to determine the accuracy of the recovery conversion process according to the heat recovery conversion efficiency and adjust the flow rate of the initial heat transfer oil entering the heat compressor, and determine the heat exchange heat loss processing method according to the accuracy determination result and the air temperature of the heat exchange area. The heat exchange heat energy loss processing method includes adjusting the circulation rate of the target heat transfer oil or adjusting the start and stop rate of the target heat transfer oil delivery pump according to the actual delivery rate of the target heat transfer oil.

2. The intelligent management system based on multi-energy linkage according to claim 1 is characterized in that: The thermal energy collection module comprises: Hot wastewater storage tanks are used to store hot wastewater discharged from chemical plants; a first temperature sensor, which is arranged on the inner wall of the hot wastewater storage tank and is used to detect the temperature of the hot wastewater; a first delivery pipeline connected to the hot wastewater storage tank and used to deliver the hot wastewater to a heat exchange location; A first plate heat exchanger connected to the first delivery pipeline for transferring the heat energy of the hot wastewater to the initial heat transfer oil; a drain pipe connected to the first plate heat exchanger and used to transport the hot wastewater after heat exchange to a wastewater treatment device; A sixth temperature sensor is arranged on the inner wall of the drain pipe to detect the temperature of the hot waste water after heat exchange.

3. The intelligent management system based on multi-energy linkage according to claim 2 is characterized in that: The thermal energy enhancement module also includes: a second delivery pipeline connected to the first plate heat exchanger and used for delivering the initial heat transfer oil to the thermal compressor; a second temperature sensor, which is arranged on the inner wall of the second delivery pipeline and is used to detect the temperature of the initial heat transfer oil; a first control valve, which is arranged on a second delivery pipeline between the first plate heat exchanger and the thermal compressor, and is used to control the flow rate of the initial heat transfer oil delivered from the first plate heat exchanger to the thermal compressor; a third delivery pipeline, connected to the second delivery pipeline, for delivering initial heat transfer oil that has not reached the standard temperature to the thermal compressor; a fourth delivery pipeline, connected to the thermal compressor, for delivering the target heat transfer oil to the second plate heat exchanger; a first circulating pump, which is connected to the third delivery pipeline and the thermal compressor respectively, and is used to circulate the initial heat transfer oil that has not reached the standard temperature after being compressed by the thermal compressor and input it into the thermal compressor to provide power; The third temperature sensor is arranged on the inner wall of the fourth delivery pipeline and is used to detect the temperature of the target heat transfer oil.

4. The intelligent management system based on multi-energy linkage according to claim 3 is characterized in that: The heat exchange unit comprises: a heat transfer oil delivery pump connected to the fourth delivery pipeline and used to control the flow rate of the target heat transfer oil delivered by the thermal compressor to the second plate heat exchanger; A second plate heat exchanger connected to the fourth delivery pipeline is used to transfer the heat energy of the target heat transfer oil to the heating water before heat exchange to output the heating water after heat exchange and the target heat transfer oil after heat exchange; a fourth temperature sensor connected to the second plate heat exchanger and used to detect the air temperature in the heat exchange area; a seventh delivery pipeline connected to the second plate heat exchanger and used for delivering the heating water before heat exchange to the second plate heat exchanger; an eighth delivery pipeline connected to the second plate heat exchanger and used for delivering the heat-exchanged heating water to a water tank for the heat-exchanged heating water; a water pump connected to the seventh delivery pipeline to provide delivery power for the heating water before heat exchange; a fifth temperature sensor, which is arranged on the inner wall of the eighth delivery pipe and is used to detect the temperature of the heating water after heat exchange; The seventh temperature sensor is arranged on the inner wall of the seventh delivery pipeline and is used to detect the temperature of the heating water before heat exchange.

5. The intelligent management system based on multi-energy linkage according to claim 4 is characterized in that: The circulation unit comprises: a fifth delivery pipeline, which is connected to the first plate heat exchanger and the second plate heat exchanger respectively, and is used to deliver the target heat transfer oil after heat exchange to the first plate heat exchanger; a sixth delivery pipeline connected to the fifth delivery pipeline, and used to cooperate with the fifth delivery pipeline to deliver the target heat-conducting oil after heat exchange back to the second plate heat exchanger for circulating heat exchange when the temperature of the target heat-conducting oil after heat exchange is greater than or equal to a preset temperature condition; a second circulation pump connected to the fifth delivery pipeline, for re-transmitting the target heat-conducting oil after heat exchange that meets the preset temperature condition to the first plate heat exchanger, and for providing circulation delivery power for the target heat-conducting oil after heat exchange that does not meet the preset temperature condition to perform the circulation heat exchange; a second control valve, which is arranged on a sixth delivery pipeline between the second plate heat exchanger and the second circulation pump, and is used to control the circulation delivery flow rate of the target heat transfer oil after the heat exchange during the circulation heat exchange; a third control valve, which is arranged on a fifth delivery pipeline between the first plate heat exchanger and the second circulation pump, and is used to control the flow rate of the target heat transfer oil after heat exchange being delivered to the first plate heat exchanger; Wherein, the preset temperature condition is that the temperature of the target heat transfer oil after the heat exchange is lower than the standard heat exchange temperature.

6. The intelligent management system based on multi-energy linkage according to claim 5 is characterized in that: The control module is connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor respectively, and is used to calculate the heat energy recovery conversion efficiency according to the temperature of the hot waste water collected by the first temperature sensor, the temperature of the initial heat transfer oil detected by the second temperature sensor, the temperature of the target heat transfer oil collected by the third temperature sensor, the temperature of the heating water before the heat exchange collected by the fifth temperature sensor, the temperature of the heating water after the heat exchange collected by the sixth temperature sensor, and the temperature of the waste water after the hot waste water passes through the first plate heat exchanger collected by the seventh temperature sensor; The heat recovery conversion efficiency is the ratio of the difference between the heat energy increased from the heating water before heat exchange to the heating water after heat exchange and the heat energy increased from the initial heat transfer oil to the target heat transfer oil to the heat energy reduced after the hot waste water passes through the first plate heat exchanger; The calculation formula for the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger is: Q1=c1m1(T s2 -T s1 ), Among them, Q1 is the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger, c1 is the specific heat capacity of the hot wastewater, m1 is the mass of the hot wastewater, T s2 is the temperature of the hot wastewater after heat exchange, T s1 is the temperature of the hot wastewater; The calculation formula for the heat energy added by the heating water before the heat exchange to the heating water after the heat exchange is: Q2=c1m2(T g2 -T g1 ), Among them, Q2 is the heat energy added by the heating water before heat exchange to the heating water after heat exchange, c1 is the specific heat capacity of the heating water, m2 is the mass of the heating water, T g2 is the temperature of the heating water after heat exchange, T g1 is the temperature of the heating water before heat exchange; The calculation formula for the difference in heat energy added when the initial heat transfer oil is changed into the target heat transfer oil and the heat energy reduced after the hot waste water passes through the first plate heat exchanger is: Q3=c2m3(T d2 -T d1 ), Where Q3 is the difference between the heat energy added by the initial heat transfer oil and the heat energy reduced by the hot wastewater after passing through the first plate heat exchanger, c2 is the specific heat capacity of the heat transfer oil, m3 is the mass of the target heat transfer oil, T d2 is the initial temperature of the heat transfer oil, T d1 is the target temperature of the thermal oil.

7. The intelligent management system based on multi-energy linkage according to claim 6 is characterized in that: The control module is connected to the thermal compressor, and is used to determine that the heat energy recovery conversion efficiency does not meet the requirements when the heat energy recovery conversion efficiency is greater than or equal to a preset first conversion efficiency, reduce the initial flow rate of heat transfer oil entering the thermal compressor from the first plate heat exchanger, and determine that the accuracy of the recovery conversion process does not meet the requirements when the heat energy recovery conversion efficiency is greater than a preset second conversion efficiency.

8. The intelligent management system based on multi-energy linkage according to claim 7 is characterized in that: The control module is respectively connected to the second circulation pump and the fourth temperature sensor, so as to determine that the degree of heat energy loss in the heat energy recovery conversion process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature, and to reduce the circulation rate of the target heat transfer oil by reducing the rotation speed of the second circulation pump when the air temperature in the heat exchange area is greater than or equal to the preset first air temperature and lower than the preset second air temperature.

9. The intelligent management system based on multi-energy linkage according to claim 8 is characterized in that: The control module is connected to the heat transfer oil delivery pump, and is used to preliminarily determine that the degree of heat energy loss in the heat energy recovery and delivery process does not meet the requirements when the air temperature in the heat exchange area is greater than or equal to the preset second air temperature, and to obtain the actual delivery rate of the target heat transfer oil. When the actual delivery rate of the target heat transfer oil is greater than or equal to the preset delivery rate, the start and stop rate of the heat transfer oil delivery pump is reduced.

10. The intelligent management system based on multi-energy linkage according to claim 1 is characterized in that: It also includes a display module, which is connected to the control module and is used to display corresponding content based on the data transmitted by the control module.

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