Heat exchange liquid nitrogen vaporization system, control method and electronic equipment

Abstract

The present invention discloses a heat exchange type liquid nitrogen vaporization system, a control method and an electronic device, which are used to solve the problem of low energy utilization rate of liquid nitrogen vaporization. This scheme includes: a heat exchange box, which is provided with a first inner cavity, a heat exchange tube and an outlet; the heat exchange tube is in the first inner cavity and is not connected to the first inner cavity, and is used to pass a heat transfer medium to guide the heated heat transfer medium to the outlet after the heat source material is heated; a vaporization box, which is provided with a second inner cavity and a vaporization tube; the vaporization tube is in the second inner cavity and is not connected to the second inner cavity, and is used to pass liquid nitrogen, so that the heat transfer medium guided out of the outlet of the heat exchange box heats the liquid nitrogen in the second inner cavity, and then guides the nitrogen vaporized by the heated liquid nitrogen out of the vaporization tube; a liquid drive pump connected to the heat exchange tube is used to drive the heat transfer medium to flow in the heat exchange tube and the second inner cavity. The system provided by the embodiment of the present application has the advantages of high thermal energy utilization rate, energy saving and environmental protection, good economy and low noise.

Description

Technical Field

[0001] The invention relates to the industrial field, and in particular to a heat exchange type liquid nitrogen vaporization system, a control method and electronic equipment. Background Art

[0002] In the field of oil and gas fields, high-pressure liquid nitrogen needs to be converted into normal-temperature high-pressure nitrogen for transportation and application. The liquid nitrogen equipment currently used includes two types: diesel-driven and electric-driven. The heat source of diesel-driven liquid nitrogen equipment is generated by fuel combustion, and the heat source of electric-driven liquid nitrogen equipment is electric heating. However, both types of liquid nitrogen equipment have the problem of high energy consumption and high maintenance cost.

[0003] How to improve the energy utilization rate of liquid nitrogen vaporization is the technical problem to be solved by this application. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a heat exchange liquid nitrogen vaporization system, a control method and an electronic device to solve the problem of low energy utilization rate of liquid nitrogen vaporization.

[0005] In a first aspect, a heat exchange liquid nitrogen vaporization system is provided, comprising:

[0006] The heat exchange box is provided with a first inner cavity, a heat exchange tube and an outlet; wherein,

[0007] The first inner cavity is used to pass heat source material into for heating;

[0008] The heat exchange tube is in the first inner cavity and is not connected to the first inner cavity, and is used to pass a heat transfer medium so as to guide the heated heat transfer medium to the outlet after the heat source material is heated;

[0009] The gasification box is provided with a second inner cavity and a gasification tube; wherein,

[0010] The second inner cavity is used to allow the heat transfer medium output from the outlet of the heat exchange box to pass through;

[0011] The vaporization pipe is in the second inner cavity and is not connected to the second inner cavity, and is used to pass liquid nitrogen, so that the heat transfer medium discharged from the outlet of the heat exchange box heats the liquid nitrogen in the second inner cavity, and then the nitrogen vaporized by the heated liquid nitrogen is discharged from the vaporization pipe;

[0012] The liquid driving pump communicated with the heat exchange tube is used to drive the heat transfer medium to flow in the heat exchange tube and the second inner cavity.

[0013] In a second aspect, a control method for heat exchange liquid nitrogen vaporization is provided, which is applied to the heat exchange liquid nitrogen vaporization system as described in the first aspect, comprising:

[0014] Acquire the temperature of the heat source material passed into the first inner cavity of the heat exchange box;

[0015] When the temperature of the heat source material is greater than the temperature of the heat transfer medium, controlling the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box;

[0016] The heat transfer medium is introduced into the heat exchange tube of the heat exchange box so as to guide the heated heat transfer medium to the outlet after the heat source material is heated. The heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

[0017] In a third aspect, an electronic device is provided, comprising:

[0018] An acquisition module for acquiring the temperature of the heat source material passing into the first inner cavity of the heat exchange box;

[0019] a first control module, which controls the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box when the temperature of the heat source material is greater than the temperature of the heat transfer medium;

[0020] The second control module introduces the heat transfer medium into the heat exchange tube of the heat exchange box to guide the heated heat transfer medium to the outlet after the heat source material is heated, and the heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

[0021] In a fourth aspect, an electronic device is provided, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method of the second aspect when executed by the processor.

[0022] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method of the second aspect are implemented.

[0023] In an embodiment of the present application, a heat exchange type liquid nitrogen vaporization system is provided, comprising a heat exchange box, a vaporization box and a liquid displacement pump. The heat exchange box and the vaporization box in the system can both realize heat exchange, so as to realize the heating of the heat transfer medium by the heat source material, and the heating of the liquid nitrogen by the heat transfer medium, thereby realizing the vaporization of the liquid nitrogen. The system provided in the embodiment of the present application has the advantages of high thermal energy utilization, energy saving and environmental protection, good economy and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is one of the structural schematic diagrams of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0026] Figure 2 This is the second structural schematic diagram of a heat exchange liquid nitrogen vaporization system according to an embodiment of the present invention.

[0027] Figure 3 This is the third structural schematic diagram of a heat exchange liquid nitrogen vaporization system according to an embodiment of the present invention.

[0028] Figure 4 This is the fourth structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0029] Figure 5 This is the fifth structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0030] Figure 6 This is the sixth structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0031] Figure 7 This is the seventh structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0032] Figure 8 This is the eighth structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0033] Fig. 9 This is the ninth structural schematic diagram of a heat exchange type liquid nitrogen vaporization system according to an embodiment of the present invention.

[0034] Fig.10 This is one of the flow diagrams of a heat exchange type liquid nitrogen vaporization control method according to an embodiment of the present invention.

[0035] Fig.11 This is the second flow chart of a heat exchange liquid nitrogen vaporization control method according to an embodiment of the present invention.

[0036] Fig.12 This is the third flow chart of a heat exchange liquid nitrogen vaporization control method according to an embodiment of the present invention.

[0037] Fig.13 It is a schematic structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The figure numbers in this application are only used to distinguish the various steps in the scheme, and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0039] In the field of oil and gas field development, the following types of liquid nitrogen equipment can be used to achieve liquid nitrogen vaporization according to the evaporation form:

[0040] 1. Diesel drive heat recovery

[0041] Diesel-driven heat recovery equipment uses diesel as energy to achieve liquid nitrogen vaporization through combustion and heat generation. With the improvement of engine emission requirements, the heat of engine exhaust gas cannot be recovered. In order to meet the heat demand of liquid nitrogen vaporization, the power of the engine must be increased, which greatly increases the equipment cost and wastes resources.

[0042] 2. Direct combustion

[0043] Direct-fired equipment uses coal or other materials as fuel to generate heat to vaporize liquid nitrogen. The exhaust gas generated by the combustion of the evaporator is directly discharged into the atmosphere. This operation method is not environmentally friendly. The exhaust gas released pollutes the environment and is very likely to endanger the natural environment on which humans depend for survival.

[0044] 3. Boiler heating

[0045] Boilers are special equipment that are managed under a local management system. It is difficult to achieve cross-regional operation and is difficult to be widely used in actual applications. In addition, they require a license to operate, which places high demands on staff and is difficult to popularize.

[0046] 4. Air temperature type

[0047] The air-temperature vaporizer uses natural convection of air to heat the liquid nitrogen in the heat exchange tube, causing it to evaporate into nitrogen gas. The nitrogen discharge temperature is 10-15°C lower than the ambient temperature, and the gasification efficiency is low, making it difficult to efficiently vaporize liquid nitrogen, and there is also a waste of resources.

[0048] 5. Electric drive and electric heating

[0049] The electric drive and electric heating equipment directly uses electric heating to gasify liquid nitrogen, which is in line with the new trend of liquid nitrogen equipment development. However, due to the particularity of liquid nitrogen equipment, the power consumption of the electric drive and electric heating type is very large.

[0050] In order to improve the resource utilization rate in the process of liquid nitrogen vaporization, achieve energy conservation and environmental protection, and avoid resource waste, the embodiment of the present application provides a heat exchange liquid nitrogen vaporization system, such as Figure 1 As shown, including:

[0051] The heat exchange box 11 is provided with a first inner cavity 111, a heat exchange tube 112 and an outlet 113; wherein,

[0052] The first inner cavity 111 is used to pass heat source material to perform heating;

[0053] The heat exchange tube 112 is in the first inner cavity 111 and is not connected to the first inner cavity 111 , and is used to pass a heat transfer medium so as to output the heated heat transfer medium to the outlet 113 after the heat source material is heated.

[0054] The system provided in the embodiment of the present application may include one or more heat exchange boxes, each of which is provided with a feed inlet and a discharge outlet. One or more heat exchange tubes may be provided inside the heat exchange box, and the heat exchange tubes may be arranged inside the exchange box in a "Y" shape, an "S" shape or other forms to increase the heat exchange area.

[0055] When there are multiple heat exchange tubes, adjacent heat exchange tubes can be connected in sequence through flow guide tubes to conduct the heat transfer medium in different heat exchange tubes. The heat exchange tubes are all made of materials with good thermal conductivity.

[0056] In actual application, when used, the heat source material is passed into the heat exchange box, and the heat transfer medium is passed into the heat exchange tube, so that the heat transfer medium absorbs the heat of the heat source material in the heat exchange box, thereby heating the heat transfer and achieving heat transfer. The heat source material can be hot gas or hot liquid.

[0057] The system also includes a gasification box 12, which is provided with a second inner cavity 121 and a gasification tube 122; wherein,

[0058] The second inner cavity 121 is used to allow the heat transfer medium outputted from the outlet 113 of the heat exchange box 11 to pass through;

[0059] The vaporization pipe 122 is in the second inner cavity 121 and is not connected to the second inner cavity 121, and is used to pass liquid nitrogen, so that the heat transfer medium discharged from the outlet 113 of the heat exchange box 11 heats the liquid nitrogen in the second inner cavity 121, and then the nitrogen vaporized by the heated liquid nitrogen is discharged from the vaporization pipe 122.

[0060] Based on the solutions provided in the above embodiments, optionally, the heat source material includes at least one of the following: hydraulic oil, lubricating oil, cylinder jacket water, and engine exhaust gas.

[0061] The gasification box may be provided with a feed inlet and a discharge inlet, the feed inlet being used to introduce a heat transfer medium from the heat exchange tube of the heat exchange box to the second inner cavity, and the discharge inlet being used to discharge the heat transfer medium from the second inner cavity. Specifically, the feed inlet of the gasification box may be connected to the port of the heat exchange tube via a flow guide tube. In addition, the gasification box includes one or more gasification tubes, and both ends of the gasification tubes may extend out of the gasification box to facilitate the introduction of liquid nitrogen into an external pipeline.

[0062] In practical applications, the heat transfer medium heated by the heat exchange box is passed into the inner cavity of the vaporization box, and the liquid nitrogen to be vaporized is passed into the vaporization pipe, so that the heat energy of the heat transfer medium can be used to vaporize the liquid nitrogen to be vaporized into gas for transportation and utilization.

[0063] The system further includes a liquid displacement pump 13 connected to the heat exchange tube 112 , and configured to drive the heat transfer medium to flow in the heat exchange tube 112 and the second inner cavity 121 .

[0064] Specifically, the liquid displacement pump is arranged on the heat exchange tube or on a pipeline connected to the heat exchange tube. When in use, starting the liquid displacement pump can make the heat transfer medium flow to realize the heat exchange process. Optionally, the liquid displacement pump includes a centrifugal pump or a screw pump.

[0065] The system provided in the embodiment of the present application includes a heat exchange box, a vaporization box and a liquid displacement pump. The heat exchange box and the vaporization box in the system can both realize heat exchange, so as to realize the heating of the heat transfer medium by the heat source material, and the heating of the liquid nitrogen by the heat transfer medium, thereby realizing the vaporization of the liquid nitrogen. The system provided in the embodiment of the present application has the advantages of high thermal energy utilization, energy saving and environmental protection, good economy and low noise.

[0066] Based on the solution provided in the above embodiment, optionally, Figure 2 As shown, the system also includes:

[0067] at least one auxiliary heating pipe 21 in communication with the heat exchange pipe 112;

[0068] An auxiliary valve 22 provided at the connection between the auxiliary heating pipe 21 and the heat exchange pipe 112 is used to control the flow rate of the heat transfer medium flowing therethrough;

[0069] The auxiliary heat source 23 is used to heat the heat transfer medium flowing through the auxiliary heating pipe 21 .

[0070] Optionally, the auxiliary heat source includes at least one of the following thermal energy devices: a solar panel, a solar water heater, an electric heater, and a boiler.

[0071] The auxiliary heating pipe can be connected to the heat exchange pipe in a non-detachable structure. In actual application, the opening of the auxiliary valve is adjusted according to usage requirements to control whether the heat transfer medium flows through the auxiliary heating pipe and the flow rate through the auxiliary heating pipe.

[0072] The auxiliary heat source in the embodiment of the present application can heat the heat transfer medium flowing through the auxiliary heating pipe to increase the heat energy of the heat transfer medium flowing through, thereby improving the efficiency of liquid nitrogen vaporization. Moreover, the auxiliary valve can be adjusted to flexibly control whether the heat transfer medium flows through the auxiliary heating pipe, thereby improving the flexibility of system application.

[0073] Optionally, the at least one auxiliary heating pipe 21 is connected to the heat exchange pipe 112 via a detachable port structure 41 .

[0074] In the embodiment of the present application, the auxiliary heating pipe and the heat exchange pipe are connected by a detachable port structure, which can facilitate the increase or decrease of the number of heat exchange pipes connected to the system according to actual needs, and can also facilitate the replacement and maintenance of the equipment.

[0075] Both ends of the auxiliary heating pipe may be provided with a detachable port structure, which may be connected to the heat exchange pipe in the heat exchange box or to the flow guide pipe between the multiple heat exchange pipes. An auxiliary valve is provided at the connection between the heat exchange pipe or the flow guide pipe and the detachable port structure.

[0076] Through the system provided in the embodiment of the present application, when operating at high power, more heat energy can be provided to the heat transfer medium flowing through by adding auxiliary heat supply pipes, thereby improving the heat exchange efficiency and further improving the efficiency of liquid nitrogen vaporization.

[0077] Based on the solution provided in the above embodiment, optionally, Figure 3 As shown, the system also includes:

[0078] The valve control module 31 electrically connected to the auxiliary valve 22 is used to control the opening of the auxiliary valve 22 according to the working conditions of the heat exchange type liquid nitrogen vaporization system.

[0079] In practical applications, the valve control module is used to adjust the opening of the auxiliary valve according to the working conditions of the system. For example, it can be divided into the following three situations:

[0080] When the heat exchange box can meet the heating demand, shutting off all auxiliary valves can isolate the auxiliary heating pipes and the auxiliary heat source, thus avoiding heat waste of the auxiliary heat source.

[0081] When the heat exchange box cannot meet the heating demand, but the full heat energy of the auxiliary heat source is not needed to participate in the circulation, the auxiliary valve can be opened, and the auxiliary heat source heats the heat transfer medium, so that the heated heat exchange medium enters the heat exchange tube through the guide pipe. Specifically, the number of auxiliary valves opened can be adjusted according to actual conditions, and the opening degree of the auxiliary valves can also be adjusted.

[0082] When all the heat energy of the auxiliary heat source is needed to participate in the circulation, the auxiliary valve can be controlled to be fully opened to allow the auxiliary heat source to heat the heat transfer medium flowing through it to achieve heat supply.

[0083] Through the system provided in the embodiment of the present application, the auxiliary valve can be flexibly adjusted according to the actual needs of the working conditions, thereby adjusting the heat carried by the heat transfer medium flowing through, and further adjusting the efficiency of liquid nitrogen vaporization.

[0084] Based on the solution provided in the above embodiment, optionally, Figure 4 As shown, the system also includes:

[0085] The heat-insulating liquid storage tank 41 is used to store the heat transfer medium when the heat exchange type liquid nitrogen vaporization system is stopped, and to introduce the stored heat transfer medium into the heat exchange tube when the heat exchange type liquid nitrogen vaporization system is running.

[0086] Through the system provided by the embodiment of the present application, when the system is shut down, the heat transfer medium can be stored in the heat preservation liquid storage tank, which can slow down the heat energy loss of the heat transfer medium, realize heat energy storage, and avoid energy waste. In the early stage of system operation, the system can also be supplied with a heat transfer medium with a certain amount of heat energy to make full use of the heat energy.

[0087] Based on the solution provided in the above embodiment, optionally, Figure 5 As shown, the system also includes:

[0088] The electric heat conversion module 51 communicated with the heat preservation liquid storage tank 41 is used to convert the heat energy of the heat transfer medium stored in the heat preservation liquid storage tank 41 into electric energy;

[0089] The battery module 52 electrically connected to the electrothermal conversion module 51 is used to store the electric energy converted by the electrothermal conversion module.

[0090] When the system is not used for a long time, it is inevitable that heat energy will be lost if the heat transfer medium is only stored in the heat preservation liquid storage tank. The electric heat conversion module provided in this embodiment can convert heat energy into electrical energy, and the converted electrical energy is stored in the battery module for storage, thereby extending the energy storage time and reducing energy waste. When the system is initially put into operation, the electrical energy stored in the battery module can be used to heat the heat transfer medium.

[0091] Based on the solution provided in the above embodiment, optionally, Figure 6As shown, the flow direction of the heat transfer medium in the heat exchange tube is opposite to the flow direction of the heat source material in the first inner cavity.

[0092] Heat exchange tubes are usually made of materials with good thermal conductivity. The heat source material with a higher temperature transfers heat energy to the heat transfer medium with a lower temperature through the heat exchange tube, causing the temperature of the heat transfer medium to rise. At the same time, the temperature of the heat source material will also drop due to the heat energy conduction.

[0093] If the flow direction of the heat source material in the first inner cavity is the same as the flow direction of the heat transfer medium in the heat exchange tube, then in the heat exchange box, the temperature of the heat transfer medium entering the heat exchange tube gradually rises, and the temperature of the heat source material gradually decreases. As a result, the temperature of the heated heat transfer medium derived from the outlet of the heat exchange box approaches the temperature of the heat source material near the outlet. In fact, the temperature of the derived heat transfer medium is equal to the temperature of the heat source material near the outlet. This makes the temperature of the heat transfer medium no longer rise when flowing in the heat exchange tube near the outlet, and even transfers heat energy to the heat source material near the outlet, resulting in reverse transfer of heat energy.

[0094] In the solution provided in the embodiment of the present application, the flow direction of the heat transfer medium in the heat exchange tube is opposite to the flow direction of the heat source material in the first inner cavity, which can ensure that heat is transferred from the heat source material to the heat transfer medium and reduce heat energy loss. For example, see Figure 6 The heat transfer medium introduced into the heat exchange tube 112 flows from the inlet to the outlet, and the heat source material introduced into the first inner cavity flows from the outlet to the inlet. This allows the heat transfer medium at the outlet of the heat exchange tube to exchange heat with the heat source material with a higher temperature, thereby avoiding heat loss in the process of the heat transfer medium being discharged from the outlet.

[0095] In practical applications, the flow direction of the heat source material can be controlled by controlling the positions of the inlet and outlet of the first inner cavity. Usually, the position of the heat exchange tube in the heat exchange box is relatively fixed, and the heat transfer medium flows along the heat exchange tube. In the solution provided in this embodiment, the inlet of the first inner cavity can be set near the outlet of the heat exchange tube, and the outlet of the first inner cavity can be set near the inlet of the heat exchange tube, so as to achieve the flow direction of the heat transfer medium opposite to the flow direction of the heat source material.

[0096] Based on the solution provided in the above embodiment, optionally, Figure 7 As shown, there are multiple heat exchange boxes, and the outlets of the multiple heat exchange boxes are connected to the second inner cavity 121 of the gasification box to pass the heated heat transfer medium into the second inner cavity 121 .

[0097] exist Figure 7The system shown includes three heat exchange boxes, which are shown as 11a, 11b and 11c respectively. In practical applications, the system may also include more or fewer heat exchange boxes. Figure 7 In the embodiment, the heat transfer medium flows to the three heat exchange boxes respectively under the driving action of the liquid displacement pump, and the heat transfer medium heated by the three heat exchange boxes is led out to the second inner cavity of the vaporization box through the outlet. In fact, multiple heat exchange boxes can also be connected in other ways. For example, the heat transfer medium heated by the heat exchange box 11a can be introduced into the heat exchange box 11b for heating again and then led out to the vaporization box through the outlet.

[0098] Through the system provided in the embodiment of the present application, the heat transfer medium can be heated through multiple heat exchange boxes. The system can be flexibly connected to multiple heat exchange boxes to adapt to actual application scenarios, which is conducive to meeting actual application needs.

[0099] Based on the solution provided in the above embodiment, optionally, Figure 8 As shown, the plurality of heat exchange boxes are connected to the gasification box in sequence in the order of the temperature of the heat source materials introduced therein from low to high.

[0100] exist Figure 8 The system shown includes three heat exchange boxes, which are shown as 11a, 11b and 11c. Among them, the temperature of the heat source material entering the heat exchange box 11a is the lowest, the temperature of the heat source material entering the heat exchange box 11b is in the middle, and the temperature of the heat source material entering the heat exchange box 11c is the highest. Driven by the liquid displacement pump 13, the heat transfer medium is heated in turn through the three heat exchange boxes, the temperature gradually rises, and finally is exported to the second inner cavity of the gasification box at a higher temperature.

[0101] Through the solution provided in the embodiment of the present application, multiple heat exchange boxes are arranged in sequence according to the temperature of the heat source material introduced, so that the temperature of the heat transfer medium flowing through gradually increases, avoiding the situation where heat is transferred to the heat source material due to the high temperature of the heat transfer medium and the low temperature of the heat source material, and making full use of the thermal energy of the heat source material.

[0102] In order to further illustrate this scheme, the following is a specific description of the scheme using solar energy equipment as an auxiliary heat source and hydraulic oil, lubricating oil, cylinder jacket water and engine exhaust gas as heat source materials:

[0103] The scheme adopted by this system is as follows Fig. 9 As shown, lubricating oil heat exchanger system, hydraulic oil heat exchanger system, cylinder liner water heat exchanger system, exhaust gas heat exchanger system, evaporator system, auxiliary heating control system, drive module, auxiliary heating system, thermal insulation storage tank system, electric heat conversion control system, electric heat conversion system, and battery unit.

[0104] The main workflow of this system is as follows:

[0105] When the equipment is not in operation, the auxiliary heating system can automatically store heat in the liquid inside it and store excess heat in the thermal insulation tank system. If the equipment is not used for a long time, the electric heat conversion control system will automatically adjust the electric heat conversion system to convert the heat of the liquid into electrical energy and store it in the battery unit to achieve reasonable use of energy.

[0106] In the initial stage of equipment operation, when the equipment does not need to work at a large displacement, the auxiliary heating system does not need to intervene, and the water evaporation system only needs to go through a small cycle. The water circulation starts from the lubricating oil heat exchanger system, hydraulic oil heat exchanger system, cylinder jacket water heat exchanger system, exhaust gas heat exchanger system, evaporator system, auxiliary heating control system, and drive module.

[0107] In the middle stage of equipment operation, when the equipment needs to work at a medium displacement, the auxiliary heating system begins to intervene. Through the adjustment of the auxiliary heating control system, part of the water channel liquid will be introduced into the auxiliary heating system to fully absorb the collected solar heat. The large and small cycles of the water channel evaporation system are opened at the same time, and the auxiliary heating control system will automatically adjust the flow entering the auxiliary heating system according to the temperature of the liquid.

[0108] At the advanced stage of equipment operation, the equipment needs to work at the maximum displacement. At this time, the auxiliary heating control system will automatically control the electric ball valve to close automatically, and the water evaporation system will completely enter the large cycle. The water cycle starts from the lubricating oil heat exchanger system, hydraulic oil heat exchanger system, cylinder jacket water heat exchanger system, exhaust gas heat exchanger system, evaporator system, auxiliary heating control system, drive module, auxiliary heating system, and drive module. When working at a large displacement, the electrical energy stored in the early stage will be converted into thermal energy through the electric heat conversion system to provide heat for the conversion of liquid nitrogen to nitrogen.

[0109] In addition, when the solar-assisted heating system cannot normally complete large-displacement operations under special weather conditions, the solar-assisted equipment can be completely provided with heat energy by the electric heat conversion system to provide sufficient heat energy for the conversion of liquid nitrogen to nitrogen gas.

[0110] Since solar energy is a renewable resource, compared with conventional energy, it has the characteristics of being inexhaustible, and as long as there is sunlight, the solar energy-assisted heating system can perform light-heat conversion. In the Middle East or other areas with sufficient heat, the regional advantages can be fully utilized. For so many heat energy sources, the system has better operation economy. Compared with conventional liquid nitrogen equipment, the system provided in this embodiment reduces the complexity and noise of the system, reduces the operating cost, breaks the inherent heat source form, makes the heat source no longer single, is more environmentally friendly and economical, realizes energy ladder application, and improves energy utilization. This scheme reduces the source of environmental pollution by changing the form of heat source, strongly responds to the national energy conservation and emission reduction policy, and has a positive effect on alleviating the rise in temperature. Compared with the traditional coal-fired and gas-fired functional mode, the solar energy-assisted heating mode is safer and more reliable. The traditional fuel combustion heating and electric heating heating have the risks of explosion and electric shock, while the solar energy-assisted heating system does not have such risks.

[0111] In order to solve the problems existing in the prior art, the present application embodiment also provides a heat exchange liquid nitrogen vaporization method, which can be applied to the heat exchange liquid nitrogen vaporization system described in any of the above embodiments, such as Fig.10 As shown, the method includes:

[0112] S101: Acquire the temperature of the heat source material entering the first inner cavity of the heat exchange box.

[0113] In practical applications, the temperature of the introduced heat source material can be monitored by providing a temperature sensor on the first inner cavity or on a pipe that introduces the heat source material into the first inner cavity.

[0114] S102: When the temperature of the heat source material is greater than the temperature of the heat transfer medium, the outlet of the heat exchange box is controlled to communicate with the second inner cavity of the gasification box.

[0115] The temperature of the heat transfer medium may be a preset temperature, such as a room temperature of 25°C, which may be preset according to the temperature of the area where the system is located. Alternatively, a temperature sensor may be provided in a container storing the heat transfer medium to obtain the temperature of the heat transfer medium in real time. Alternatively, a temperature sensor may be provided at the entrance of the heat exchange box to obtain the temperature of the heat transfer medium before the heat exchange tube passes into the heat exchange box.

[0116] In this step, when the temperature of the heat source material is greater than the temperature of the heat transfer medium, it indicates that the heat source material can transfer heat energy to the heat transfer medium by heat conduction to achieve heating of the heat transfer medium. At this time, the outlet of the heat exchange box can be controlled by instructions to communicate with the second inner cavity of the vaporization box, so that the heat exchange tube is connected to the second inner cavity, so as to facilitate the extraction of the heated heat transfer medium into the second inner cavity.

[0117] S103: introducing the heat transfer medium into the heat exchange tube of the heat exchange box to guide the heated heat transfer medium to the outlet after the heat source material is heated, and the heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

[0118] After the heat exchange tube is controlled to be connected with the second inner cavity, a heat transfer medium is introduced into the heat exchange tube so that the heat source material heats the heat transfer medium in a heat exchange manner. Since the heat exchange box is controlled to be connected with the vaporization box only when the temperature of the heat source material is higher than the temperature of the heat transfer medium, it can be ensured that the heat exchange box heats the heat transfer medium flowing through it, avoids heat being transferred to the heat source material in reverse, and ensures that the heat transfer medium has the heat energy to vaporize the liquid nitrogen.

[0119] Based on the method provided in the above embodiment, optionally, Fig.11 As shown, when there are multiple heat exchange boxes, the above step S101 includes:

[0120] S201: respectively obtaining the temperatures of the heat source materials passing into the first inner chambers of the plurality of heat exchange boxes.

[0121] In practical applications, the temperature of the heat source material entering the first inner cavity of each heat exchange box can be obtained by setting a temperature sensor at the entrance of the first inner cavity of the heat exchange box. Alternatively, the temperature sensor can also be set in the first inner cavity.

[0122] The above step S102 includes:

[0123] S202: Controlling the plurality of heat exchange boxes to be connected to the second inner cavity of the gasification box in sequence in the order of the temperature of the heat source material introduced therein from low to high.

[0124] In this step, the heat exchange boxes are sorted according to the temperature of the heat source materials passing into the multiple heat exchange boxes, so that the heat exchange box with the highest heat source material temperature is directly connected to the gasification box. The lower the temperature of the heat source material, the more heat exchange boxes are spaced between the gasification box and the heat exchange box.

[0125] The above step S103 includes:

[0126] S203: introducing the heat transfer medium into the heat exchange tube of the heat exchange box having the lowest temperature for introducing the heat source material, so that after the heat source materials of the plurality of heat exchange boxes connected in sequence are heated, the heated heat transfer medium is introduced into the second inner cavity of the gasification box.

[0127] The temperature of any heat source material introduced into the heat exchange box is higher than the temperature of the unheated heat transfer medium. In this embodiment, the heat transfer medium is introduced into the heat exchange tube of the heat exchange box with the lowest temperature, so that the heat transfer medium can be preliminarily heated by the heat source material with the lowest temperature. The preliminarily heated heat transfer medium sequentially flows through the heat exchange boxes with higher temperatures, so that the temperature of the heat transfer medium discharged reaches the highest. In the process of the heat transfer medium flowing through multiple heat exchange boxes, the situation where the temperature of the heat transfer medium is higher than that of the heat source material is avoided, thereby avoiding reverse heat transfer and avoiding heat energy waste.

[0128] Based on the solution provided in the above embodiment, optionally, Fig.12 As shown, when the heat exchange type liquid nitrogen vaporization system includes at least one auxiliary heat source, it also includes:

[0129] S301: respectively obtaining the temperature of the heat transfer medium in the heat exchange tubes of the plurality of heat exchange boxes and the temperature of the heat transfer medium after being heated by the auxiliary heat source.

[0130] In practical applications, the temperature of the heat transfer medium in the heat exchange tube can be measured by a temperature sensor pre-set at the heat exchange tube. Optionally, due to the large number of heat exchange tubes, an infrared camera can be used to capture an image of the area where the heat exchange tubes are located, and the temperature of the heat transfer medium in the plurality of heat exchange tubes can be determined based on infrared imaging parameters. In addition, the temperature of the heat transfer medium after being heated by the auxiliary heat source can also be measured and obtained by a temperature sensor.

[0131] S302: Determine a first exchange tube and a second exchange tube for connecting to the auxiliary heat source among the heat exchange tubes of the multiple heat exchange boxes, wherein the temperature of the heat transfer medium in the first exchange tube is lower than the temperature of the heat transfer medium after being heated by the auxiliary heat source, and the temperature of the heat transfer medium in the second exchange tube is equal to or higher than the temperature of the heat transfer medium after being heated by the auxiliary heat source.

[0132] After obtaining the temperatures of the heat transfer medium in the multiple heat exchange tubes, the multiple temperatures obtained can be sorted, and the heat exchange tubes corresponding to the multiple temperatures can be divided into heat exchange tubes with a higher temperature than the heat transfer medium after being heated by the auxiliary heat source, and heat exchange tubes with a lower temperature than the heat transfer medium after being heated by the auxiliary heat source.

[0133] Optionally, the obtained multiple temperatures are sorted, and the exchange tube corresponding to the lower temperature adjacent to the temperature of the heated heat transfer medium is determined as the first exchange tube, and the exchange tube corresponding to the higher temperature adjacent to the temperature of the heated heat transfer medium is determined as the second exchange tube.

[0134] S303: Control the auxiliary heat source to be connected to the first heat exchange tube through the first auxiliary heat supply tube, and to be connected to the second heat exchange tube through the second auxiliary heat supply tube, so as to allow the heat transfer medium in the first heat exchange tube to be introduced into the auxiliary heat source, and the heat transfer medium heated by the auxiliary heat source to be exported to the second heat exchange tube.

[0135] In this step, according to the first exchange tube and the second exchange tube determined in the above step, the auxiliary heat source is connected to the system to assist in heating the heat transfer medium flowing through. Among them, since the temperature of the heat transfer medium in the first heat exchange tube is relatively low, and the temperature of the heat transfer medium in the second heat exchange tube is relatively high, the heat energy of the auxiliary heat source can be fully utilized after the auxiliary heat source is connected, that is, the heat transfer medium with a relatively low temperature is heated by the auxiliary heat source, and the heated heat transfer medium is passed into the second heat exchange tube to merge with the heat transfer medium with an isothermal or higher temperature, so that the heat transfer medium circulating in the system has more heat.

[0136] In practical applications, the auxiliary heat source in the embodiment of the present application can be connected to both ends of a heat exchange box, or can be connected to both ends of multiple heat exchange boxes, for example, between the heat exchange medium input end of one heat exchange box and the heat exchange medium output end of another heat exchange box.

[0137] In order to solve the problems existing in the prior art, the embodiment of the present application further provides an electronic device: 400, such as Fig.13 As shown, including:

[0138] An acquisition module 401 is used to acquire the temperature of the heat source material entering the first inner cavity of the heat exchange box;

[0139] The first control module 402 controls the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box when the temperature of the heat source material is greater than the temperature of the heat transfer medium;

[0140] The second control module 403 introduces the heat transfer medium into the heat exchange tube of the heat exchange box to guide the heated heat transfer medium to the outlet after the heat source material is heated, and the heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

[0141] Through the electronic device provided in the embodiment of the present application, the connection of the heat exchange liquid nitrogen vaporization system can be controlled to ensure that the temperature of the heat source material in the heat exchange box is higher than the heat transfer medium, so that heat energy is transferred from the heat source material to the heat transfer medium, avoiding energy waste caused by reverse heat conduction, and effectively heating the heat transfer medium so that the heated heat transfer medium has the heat energy to vaporize the liquid nitrogen.

[0142] Preferably, an embodiment of the present invention further provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, each process of the above-mentioned heat exchange type liquid nitrogen vaporization control method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0143] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the control method of heat exchange liquid nitrogen vaporization described above is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0144] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0145] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0146] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A heat exchange liquid nitrogen vaporization system, characterized in that: include: The heat exchange box is provided with a first inner cavity, a heat exchange tube and an outlet; wherein, The first inner cavity is used to pass heat source material into for heating; The heat exchange tube is in the first inner cavity and is not connected to the first inner cavity, and is used to pass a heat transfer medium so as to guide the heated heat transfer medium to the outlet after the heat source material is heated; The gasification box is provided with a second inner cavity and a gasification tube; wherein, The second inner cavity is used to allow the heat transfer medium output from the outlet of the heat exchange box to pass through; The vaporization pipe is in the second inner cavity and is not connected to the second inner cavity, and is used to pass liquid nitrogen, so that the heat transfer medium discharged from the outlet of the heat exchange box heats the liquid nitrogen in the second inner cavity, and then the nitrogen vaporized by the heated liquid nitrogen is discharged from the vaporization pipe; a liquid driving pump in communication with the heat exchange tube, for driving the heat transfer medium to flow in the heat exchange tube and the second inner cavity; at least one auxiliary heating pipe in communication with the heat exchange pipe; An auxiliary valve disposed at the connection between the auxiliary heating pipe and the heat exchange pipe, used to control the flow rate of the heat transfer medium flowing therethrough; An auxiliary heat source, used to heat the heat transfer medium flowing through the auxiliary heating pipe; A heat-insulating liquid storage tank, used for storing heat transfer medium when the heat exchange type liquid nitrogen vaporization system is stopped, and for introducing the stored heat transfer medium into the heat exchange tube when the heat exchange type liquid nitrogen vaporization system is in operation; an electric heat conversion module connected to the thermal insulation liquid storage tank, used for converting the heat energy of the heat transfer medium stored in the thermal insulation liquid storage tank into electrical energy; The battery module electrically connected to the electrothermal conversion module is used to store the electric energy converted by the electrothermal conversion module.

2. The system according to claim 1, characterized in that There are multiple heat exchange boxes, and outlets of the multiple heat exchange boxes are connected to the second inner cavity of the gasification box to allow heated heat transfer medium to flow into the second inner cavity.

3. The system according to claim 2, characterized in that The plurality of heat exchange boxes are connected to the gasification box in sequence in order of the temperature of the heat source material introduced therein from low to high.

4. The system according to claim 1, characterized in that The auxiliary heat source includes at least one of the following thermal energy devices: Solar panels, solar water heaters, electric heaters, boilers.

5. The system according to claim 1, wherein: Also includes: The valve control module electrically connected to the auxiliary valve is used to control the opening size of the auxiliary valve according to the working conditions of the heat exchange type liquid nitrogen vaporization system.

6. The system according to claim 1, wherein: The at least one auxiliary heat supply pipe is in communication with the heat exchange pipe via a detachable port structure.

7. The system according to any one of claims 1 to 3, characterized in that: The flow direction of the heat transfer medium in the heat exchange tube is opposite to the flow direction of the heat source material in the first inner cavity.

8. The system according to any one of claims 1 to 3, characterized in that: The heat source material includes at least one of the following: Hydraulic oil, lubricating oil, cylinder water, engine exhaust gas.

9. The system according to any one of claims 1 to 3, characterized in that: The liquid displacement pump comprises a centrifugal pump or a screw pump.

10. A method for controlling heat exchange liquid nitrogen vaporization, characterized in that: The heat exchange liquid nitrogen vaporization system as claimed in any one of claims 1 to 9 comprises: Acquire the temperature of the heat source material passed into the first inner cavity of the heat exchange box; When the temperature of the heat source material is greater than the temperature of the heat transfer medium, controlling the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box; The heat transfer medium is introduced into the heat exchange tube of the heat exchange box so as to guide the heated heat transfer medium to the outlet after the heat source material is heated. The heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

11. The method according to claim 10, characterized in that When there are multiple heat exchange boxes, obtaining the temperature of the heat source material passing into the first inner cavity of the heat exchange box includes: respectively obtaining the temperature of the heat source materials passing into the first inner chambers of the plurality of heat exchange boxes; Wherein, controlling the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box comprises: Controlling the plurality of heat exchange boxes to be connected to the second inner cavity of the gasification box in sequence in the order of the temperature of the heat source material introduced from low to high; Wherein, the heat transfer medium is introduced into the heat exchange tube of the heat exchange box so as to guide the heated heat transfer medium to the outlet after the heat source material is heated, comprising: The heat transfer medium is introduced into the heat exchange tube of the heat exchange box having the lowest temperature for introducing the heat source material, so that after the heat source materials of the plurality of heat exchange boxes connected in sequence are heated, the heated heat transfer medium is introduced into the second inner cavity of the gasification box.

12. The method according to claim 11, characterized in that When the heat exchange type liquid nitrogen vaporization system includes at least one auxiliary heat source, it also includes: respectively obtaining the temperature of the heat transfer medium in the heat exchange tubes of the plurality of heat exchange boxes and the temperature of the heat transfer medium after being heated by the auxiliary heat source; Determining a first heat exchange tube and a second heat exchange tube for communicating with the auxiliary heat source from the heat exchange tubes of the plurality of heat exchange boxes, wherein the temperature of the heat transfer medium in the first heat exchange tube is lower than the temperature of the heat transfer medium after being heated by the auxiliary heat source, and the temperature of the heat transfer medium in the second heat exchange tube is equal to or higher than the temperature of the heat transfer medium after being heated by the auxiliary heat source; The auxiliary heat source is controlled to be connected to the first heat exchange tube through the first auxiliary heat supply tube, and to be connected to the second heat exchange tube through the second auxiliary heat supply tube, so that the heat transfer medium in the first heat exchange tube is introduced into the auxiliary heat source, and the heat transfer medium heated by the auxiliary heat source is guided into the second heat exchange tube.

13. An electronic device, characterized in that: The heat exchange liquid nitrogen vaporization system as claimed in any one of claims 1 to 9 comprises: An acquisition module for acquiring the temperature of the heat source material passing into the first inner cavity of the heat exchange box; a first control module, which controls the outlet of the heat exchange box to communicate with the second inner cavity of the gasification box when the temperature of the heat source material is greater than the temperature of the heat transfer medium; The second control module introduces the heat transfer medium into the heat exchange tube of the heat exchange box to guide the heated heat transfer medium to the outlet after the heat source material is heated, and the heated heat transfer medium is used to heat liquid nitrogen to obtain nitrogen gas.

14. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method according to any one of claims 10 to 12.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 12 are implemented.

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