A heat exchange network construction method and system

Abstract

The present invention discloses a method and system for building a heat exchange network, and relates to the technical field of heat exchange equipment. It includes a plurality of heat exchangers, which are scattered inside a factory building, and the positions of industrial equipment inside the factory building are obtained. The positions of the industrial equipment inside the factory building and the positions of the heat exchangers are mapped into a plane coordinate axis, and the plane coordinate axis is constructed based on the spatial data of the factory building. The present invention obtains the initial positions of the industrial equipment inside the factory building and the heat exchangers to be installed, and constructs a plane coordinate axis in combination with the internal arrangement of the factory building. The optimal pipeline laying path is simulated by adjusting the two heat exchangers with the largest power difference in the plane coordinate axis, and an efficient heat exchange network is built inside the factory building, which not only improves the heat exchange efficiency, but also reduces the complexity and cost of pipeline laying. In addition, through simulation calculation, the performance of the heat exchange network in actual operation is predicted, thereby providing a more stable and efficient heat exchange solution for industrial equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a method and system for building a heat exchange network. Background Art

[0002] A heat exchange network is a system consisting of multiple heat exchangers connected together, which is used for heat exchange in industrial production and heating and cooling processes. A heat exchange network is a system consisting of multiple heat exchangers and pipes. In this system, liquids or gases at different temperatures can transfer heat without mixing with each other, thereby achieving energy conservation, emission reduction and reducing production costs.

[0003] After searching, the Chinese invention patent with publication number "CN116738637A" discloses an "optimization method for a constant pressure reduction heat exchange network". This application optimizes the mathematical optimization model of the constant pressure reduction heat exchange network by adjusting the heat load of the industrial heat exchanger and taking the preset minimized energy cost as the optimization target. The mathematical optimization model of the constant pressure reduction heat exchange network that achieves the minimized energy cost is used as the final constant pressure reduction heat exchange network, thereby achieving the effect of reducing energy costs.

[0004] In addition, the Chinese invention patent with publication number "CN109708516A" discloses "a method for efficiently utilizing old heat exchange equipment to improve industrial heat exchange networks". Based on the condition of "minimum modification of old heat exchange equipment", the application gradually configures the heat exchange area according to several priorities; then, for the remaining heat exchangers, the principle of "maximum utilization of heat exchange equipment" is adopted, and the heat exchange units are configured according to two priorities; finally, on the premise of "meeting needs", the new heat exchanger is matched for the remaining required heat exchange area, and the old heat exchange units are matched with the required heat exchangers in a layered and step-by-step manner to achieve optimal utilization of all old heat exchange equipment, greatly improving the area reuse rate of old heat exchange equipment and reducing investment costs.

[0005] However, in a chemical reaction workshop, since the space inside the chemical reaction workshop is usually relatively closed, and the heat energy emitted by the industrial equipment in the chemical reaction workshop will be accompanied by compound emissions to a certain extent, the chemical reaction workshop needs to be cleaned when laying and replacing a new heat exchange network. The above two disclosed methods and similar methods cannot be directly applied to the specific environment of a chemical reaction workshop during operation. These methods did not fully consider the particularity of the chemical reaction workshop during design, such as space limitations on the planning of heat exchangers and pipeline laying paths. Therefore, a new heat exchange network construction method is needed, which can adapt to the special environment of a chemical reaction workshop while ensuring heat exchange efficiency and reducing the complexity and cost of the heat exchange network laying process. Summary of the invention

[0006] The purpose of the present invention is to provide a method and system for constructing a heat exchange network to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] In the first aspect, a method for constructing a heat exchange network is proposed, comprising: a plurality of heat exchangers, wherein the plurality of heat exchangers are scattered inside a plant;

[0009] Get the location of industrial equipment inside the factory;

[0010] Map the positions of the industrial equipment inside the plant together with the positions of the heat exchangers into a plane coordinate axis, where the plane coordinate axis is constructed based on the plant space data, and the origin of the plane coordinate axis is the geometric center of the plant, and the horizontal and vertical coordinates of the plane coordinate axis represent the length and width directions of the plant respectively;

[0011] Adjust the heat exchanger coordinates based on the heat exchange requirements of industrial equipment;

[0012] Get the pipeline path set outside the industrial equipment inside the factory;

[0013] The pipeline path set outputs the optimal pipeline laying path based on the heat exchange network carrying index;

[0014] Building a heat exchange network in the plant based on the optimal pipeline laying path within the plane coordinate axis;

[0015] The method for obtaining the pipeline path set includes:

[0016] Obtaining coordinate positions of a first heat exchanger and a second heat exchanger in a plane coordinate axis, wherein the first heat exchanger is the one with the highest heat exchange power among the plurality of radiators, and the second heat exchanger is the one with the lowest heat exchange power among the plurality of radiators;

[0017] A pipeline path set between the first heat exchanger and the second heat exchanger in the plane coordinate axis is obtained, where the pipeline path set includes a plurality of pipeline paths, and the pipeline paths are used to connect all the heat exchangers and surround the industrial equipment inside the plant to form a heat exchange network.

[0018] As a further preferred embodiment of the present technical solution, the method for obtaining the pipeline path set includes:

[0019] Obtain the heat exchange power of all heat exchangers, and obtain the third heat exchanger based on the average value of the heat exchange power;

[0020] The location of the third heat exchanger inside the plant is used as the initial point of the pipeline path;

[0021] All heat exchangers except the third heat exchanger are arranged in an equidistant manner within the plane coordinate axis;

[0022] A pipeline path set is obtained based on the positions of the first heat exchanger, the second heat exchanger, and the third heat exchanger in the plane coordinate axis.

[0023] As a further preferred embodiment of the present technical solution, the method for obtaining the pipeline path includes:

[0024] Obtain the coordinates of the first industrial equipment, where the first industrial equipment is the industrial equipment with the highest temperature inside the factory building;

[0025] Obtain the coordinates of the second industrial equipment, where the second industrial equipment is the industrial equipment with the lowest temperature inside the factory building;

[0026] obtaining a thermal gradient of a pipeline path based on a temperature difference between the first industrial equipment and the second industrial equipment;

[0027] Based on the thermal gradient and efficiency requirements of the heat exchange network, all heat exchangers are connected and a set of pipeline paths is obtained.

[0028] As a further preferred embodiment of the present technical solution, the heat exchange network loading index includes: a distance index and a pipeline section number index, and the method for outputting the optimal pipeline laying path based on the distance index of the pipeline path set includes:

[0029] Get the distance indicator value;

[0030] Convert the distance index value into the plane coordinate axis and output the conversion result;

[0031] Obtain all distance sets of the first heat exchanger and the second heat exchanger in the pipeline path set in the plane coordinate axis;

[0032] The distance set is eliminated based on the conversion result, and the optimal pipeline laying path is output. The optimal pipeline laying path is the pipeline path with the smallest value in the distance set.

[0033] As a further preferred embodiment of the present technical solution, the method for outputting the optimal pipeline laying path based on the pipeline node number index of the pipeline path set includes:

[0034] Get the value of the pipeline section number indicator;

[0035] Obtain the number of pipelines in each pipeline path set based on all distance sets;

[0036] The pipeline path with matching values ​​of the number of pipelines and the number of pipeline sections is selected as the optimal pipeline laying path.

[0037] As a further preferred embodiment of the present technical solution, a method for obtaining the distance between the first heat exchanger and the second heat exchanger in the plane coordinate axis includes:

[0038] Get the positions of the first heat exchanger and the second heat exchanger on the plane coordinate axis (x1, y1), (x2, y2);

[0039] Based on the plane distance calculation formula, obtain the distance d between the first heat exchanger and the second heat exchanger;

[0040] The plane distance calculation formula is: .

[0041] As a further preferred embodiment of the present technical solution, a method for mapping the position of the industrial equipment inside the plant together with the position of the heat exchanger to the plane coordinate axis includes:

[0042] Get the internal area of ​​the factory building;

[0043] Based on the internal area characteristics of the factory building, select the origin of the plane coordinate axis;

[0044] Obtain the location of industrial equipment and heat exchangers inside the factory;

[0045] Set the zoom ratio;

[0046] The coordinates of the industrial equipment inside the plant and the heat exchanger in the plane coordinate axis are obtained based on the scaling ratio, the position of the industrial equipment inside the plant and the position of the heat exchanger.

[0047] As a further preferred embodiment of the present technical solution, the method for adjusting the coordinates of the heat exchanger includes:

[0048] Determine the priority of heat exchanger coordinate adjustment based on the heat exchange requirements of industrial equipment;

[0049] Based on the priority results, arrange the heat exchanger coordinate adjustment order;

[0050] Based on the properties of the industrial equipment, obtain the installation method between the heat exchanger and the industrial equipment;

[0051] Based on the installation mode and the heat exchanger coordinate adjustment order, a matching heat exchanger set is obtained;

[0052] Obtain the heat dissipation power of industrial equipment after matching the heat exchanger set;

[0053] Based on the heat dissipation power and heat exchange requirements, abnormal heat exchangers in the heat exchanger set are eliminated, and qualified heat exchangers are output;

[0054] The real-time coordinates of the qualified heat exchanger are moved to the coordinate position of the industrial equipment.

[0055] In the second aspect, in order to improve the above technical solution, the present invention also proposes a system using the above heat exchange network construction method, including:

[0056] The location acquisition module is used to obtain the location of industrial equipment inside the factory;

[0057] A coordinate mapping module is used to map the positions of industrial equipment inside the plant together with the positions of heat exchangers into the plane coordinate axes;

[0058] Heat exchange demand analysis and adjustment module, used to adjust the heat exchanger coordinates based on the heat exchange demand of industrial equipment;

[0059] The pipeline path planning module is used to obtain the pipeline path set outside the industrial equipment inside the factory;

[0060] The optimization calculation module outputs the optimal pipeline laying path based on the heat exchange network loading indicators;

[0061] The conversion module is used to convert the optimal pipeline laying path in the plane coordinate axis into the plant and build a heat exchange network.

[0062] As a further preferred embodiment of the present technical solution, it also includes:

[0063] Thermal gradient analysis module, used to evaluate temperature differences between industrial equipment and optimize thermal gradients in pipeline paths;

[0064] Real-time monitoring module, used to monitor the operation status of the heat exchange network and output the heat exchanger position and pipeline configuration information in real time;

[0065] The user interface module is used to provide a user interaction interface to display the layout and operation status of the heat exchange network.

[0066] Compared with the prior art, the present invention has the following beneficial effects:

[0067] This heat exchange network construction method obtains the initial positions of industrial equipment inside the factory and the heat exchangers to be installed, and constructs a plane coordinate axis in combination with the internal layout of the factory. The optimal pipeline laying path is simulated by adjusting the two heat exchangers with the largest power difference in the plane coordinate axis, thereby realizing the construction of an efficient heat exchange network inside the factory. It not only improves the heat exchange efficiency, but also reduces the complexity and cost of pipeline laying. In addition, through simulation calculations, the performance of the heat exchange network in actual operation is predicted, thereby providing a more stable and efficient heat exchange solution for industrial equipment.

[0068] In addition, the system can automatically identify and analyze the heat exchange requirements of various industrial equipment in the factory, and accurately map the positions of equipment and heat exchangers to the plane coordinate axis through the coordinate mapping module. Subsequently, the heat exchange demand analysis and adjustment module dynamically adjusts the position of the heat exchanger according to the heat exchange requirements of the equipment to ensure the maximum heat exchange efficiency. The pipeline path planning module is responsible for planning the best pipeline path set to reduce the length of the pipeline and the number of elbows, reduce construction and maintenance costs, and the optimization calculation module calculates the optimal pipeline laying path based on the indicators of the heat exchange network, such as heat exchange efficiency, energy consumption and cost. Finally, the conversion module converts the optimal path in the plane coordinate axis to the actual factory space and builds an efficient heat exchange network. Through the collaborative work of these modules, this technical solution can significantly improve the performance and efficiency of the heat exchange network inside the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 is a flow chart of the steps of the method of the present invention;

[0070] Figure 2 This is a module composition diagram of the system of the present invention. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the invention described is only a part of the invention of the present invention, not the whole invention. Based on the invention in the present invention, all other inventions obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0072] Before understanding the present invention, it should be clear that a large amount of heat energy is often generated in industrial plants due to the needs of various process flows. Most of this heat energy is recycled by using heat exchangers to connect pipes. In actual use, heat exchange is achieved by connecting the heat exchanger and the pipe system of industrial equipment.

[0073] In a chemical reaction workshop, since the space inside the chemical reaction workshop is usually relatively closed, and the heat energy emitted by the industrial equipment in the chemical reaction workshop will be accompanied by compound emissions to a certain extent, the chemical reaction workshop needs to be cleaned when laying and replacing a new heat exchange network. In order to speed up the construction of the heat exchange network, the present invention proposes a heat exchange network construction method. It should be added that when the method proposed by the present invention is actually operated, the chemical reaction workshop includes several heat exchangers, and several heat exchangers are scattered inside the factory building.

[0074] refer to Figure 1 It can be known that a method for constructing a heat exchange network includes: steps S100 to S600.

[0075] Specifically, step S100: obtaining the location of industrial equipment inside the factory.

[0076] It should be clear that, in the present invention, the method for obtaining the position of industrial equipment inside the factory is accomplished by laser scanning technology in the prior art.

[0077] Specifically, when the laser scanning technology is in operation in the present invention, the entire interior of the factory is covered by emitting laser beams. When the laser beams encounter the surface of industrial equipment, they will be reflected. By collecting these reflected signals, the position and size of the industrial equipment can be accurately determined.

[0078] Step S200: Mapping the positions of the industrial equipment inside the factory together with the positions of the heat exchangers into the plane coordinate axes.

[0079] It should be clear that the plane coordinate axis in step S200 is constructed based on the factory space data, and the origin of the plane coordinate axis is the geometric center of the factory. The horizontal and vertical coordinates of the plane coordinate axis represent the length and width directions of the factory respectively.

[0080] Specifically, in the present invention, the method of mapping the positions of industrial equipment inside the factory together with the positions of the heat exchangers into the plane coordinate axes includes: steps S201 to S205.

[0081] Step S201: Obtain the internal area of ​​the factory building.

[0082] It should be clear that the internal area of ​​the factory is obtained through laser scanning technology, and the internal area of ​​the factory is used to determine the boundaries and space limitations inside the factory.

[0083] Step S202: Based on the internal area range characteristics of the factory building, select the origin of the plane coordinate axis.

[0084] It should be clear that in the present invention, the internal area range characteristics of the factory building include: the geometric center of the factory building, the location of the main passages and the distribution of industrial equipment. There are two methods for determining the origin of the plane coordinate axis. One is to directly select the geometric center of the factory building as the origin, and the other is to select an optimal position as the origin based on the internal area range characteristics of the factory building, taking into account the location of the main passages and the distribution of industrial equipment.

[0085] Specifically, in the process of determining the origin of the plane coordinate axis, we will first analyze whether the geometric center of the factory building meets the conditions for being the origin. For example, if the geometric center is located inside the factory building and there are no significant obstacles or special structures around it, then it will be directly selected as the origin.

[0086] However, if there are restrictions on the location of the geometric center, such as being close to a wall or blocked by large equipment, then the second method is needed. In this case, the second method will comprehensively consider the layout of the main passages and industrial equipment in the factory, and obtain the common vacant position of the layout of the main passages and industrial equipment as the origin.

[0087] Step S203: Acquire the location of industrial equipment and heat exchangers inside the factory.

[0088] It should be noted that the industrial equipment position and the heat exchanger position in step S203 are both obtained using laser scanning technology.

[0089] Step S204: Setting the zoom ratio.

[0090] It should be noted that the scaling ratio in step S204 is manually set.

[0091] It should be added that the actual space inside the factory should be taken into account when the scaling ratio is set manually. For example, when the actual space inside the factory is 2500m 2 When designing, the zoom ratio will be set to 1:100 to show the entire plant layout more clearly on the drawing. This zoom ratio ensures that all details are presented accurately without being too complicated, making it easier for engineers to analyze and design.

[0092] Step S205: based on the scaling ratio and the position of the industrial equipment and the heat exchanger inside the factory, the coordinates of the industrial equipment and the heat exchanger inside the factory are obtained in the plane coordinate axis.

[0093] It should be clear that in step S205, based on the scaling ratio and the location of the industrial equipment and the heat exchanger inside the plant, the three-dimensional coordinates of each device and heat exchanger are converted into two-dimensional coordinates through calculation, and then mapped to the plane coordinate axis. In this way, engineers can intuitively see the layout of the entire plant, which facilitates the subsequent heat exchange network design and optimization.

[0094] Specifically, in actual operation, since the origin of the plane coordinate axis is obtained in step S202 and the scaling ratio is set in step S204, the horizontal and vertical distances from each industrial equipment and heat exchanger to the origin are obtained through laser scanning technology, and combined with the scaling ratio, the coordinates of the industrial equipment and the heat exchanger inside the factory building in the plane coordinate axis are obtained.

[0095] For example, the horizontal distance of a chemical distillation kettle is 10 meters and the vertical distance is 5 meters. Therefore, the coordinates of the chemical distillation kettle after scaling (scaling ratio is 0.25) are mapped to the plane coordinate axis as (2.5, 1.25). In this way, the positions of all industrial equipment and heat exchangers can be accurately mapped to the plane coordinate axis, thereby providing an accurate layout reference for the construction of the heat exchange network.

[0096] Step S300: adjusting the heat exchanger coordinates based on the heat exchange requirements of the industrial equipment.

[0097] It should be understood that, in the present invention, the method for adjusting the heat exchanger coordinates includes: step S301 to step S307.

[0098] Step S301: Determine the priority of heat exchanger coordinate adjustment based on the heat exchange demand of the industrial equipment.

[0099] It should be clear that in step S301, the heat exchange requirements of industrial equipment are clearly defined as known data when the industrial equipment is manufactured, and these data are usually provided by the equipment manufacturer. The priority is determined based on the urgency of the heat exchange demand and the impact on the entire production process. For example, some key equipment such as reactors may require more frequent cooling or heating, so their heat exchanger coordinate adjustments will be given higher priority.

[0100] Step S302: Arrange the heat exchanger coordinate adjustment order based on the priority result.

[0101] It should be clear that step S302 is used to determine the order of heat exchanger coordinate adjustment to ensure that the heat exchange needs of key equipment are met first. When arranging the order, the distance between the heat exchanger and the industrial equipment, the capacity of the heat exchanger, and the heat exchange efficiency factors are considered. For example, heat exchangers with closer distances and larger capacities may be given priority because they can more effectively meet the heat exchange needs of industrial equipment.

[0102] Step S303: Based on the attributes of the industrial equipment, the installation method between the heat exchanger and the industrial equipment is obtained.

[0103] It should be clear that step S303 is used to determine the best installation method between the heat exchanger and the industrial equipment to achieve the best heat exchange effect. This step takes into account factors such as the physical size and shape of the equipment and the type of the heat exchanger to ensure that the heat exchanger can closely cooperate with the industrial equipment, reduce heat loss, and improve the overall heat exchange efficiency. For example, for a large reactor, a large plate heat exchanger may be installed to provide sufficient heat exchange area, while for occasions with limited space, a compact spiral heat exchanger may be selected.

[0104] Step S304: based on the installation mode and the heat exchanger coordinate adjustment sequence, a matching heat exchanger set is obtained.

[0105] It should be clear that step S304 is used to select a heat exchanger model and size that is suitable for the installation method. In step S304, the performance parameters of the heat exchanger, such as heat exchange capacity, pressure loss, and corrosion resistance, will be considered to ensure that the selected heat exchanger can meet the heat exchange requirements of specific industrial equipment. For example, for environments that require efficient heat exchange and corrosion resistance, a heat exchanger made of titanium alloy may be selected. In addition, the installation space and maintenance convenience of the heat exchanger must also be considered to ensure the feasibility and economy of the heat exchanger in actual applications.

[0106] Step S305: obtaining the heat dissipation power of the industrial equipment after being adapted to a matching heat exchanger set.

[0107] It should be clear that step S305 is used to evaluate the heat dissipation performance of industrial equipment after the matching heat exchanger set is installed to ensure that the heat dissipation power meets the operating requirements of the industrial equipment. In step S305, the simulation software in the prior art will be used to simulate the heat dissipation power to predict the heat dissipation effect of the equipment under different working conditions. If the calculation result shows that the heat dissipation power is insufficient, it is necessary to reselect the heat exchanger or adjust the installation method of the heat exchanger until the heat dissipation power reaches the expected standard. In this way, it can be ensured that the industrial equipment will not affect production efficiency or cause equipment damage due to heat dissipation problems during actual operation.

[0108] Specifically, in step S305, the simulation calculation formula for the heat dissipation power is: ; Where Q is the heat dissipation power (unit: W), is the mass flow rate of the fluid (unit: kg / s), cp is the specific heat capacity of the fluid [unit: J / (kg·K)], and ΔT is the temperature difference between the inlet and outlet of the fluid (unit: k).

[0109] In actual testing, for example, there is a chemical reactor that needs to be cooled by a heat exchanger. The fluid in the reactor needs to dissipate heat during operation to maintain a safe temperature range. At this time, the mass flow rate of the fluid is 500 kg / h, the specific heat capacity of the fluid is 4.18 kJ / (kg·K), and the inlet and outlet temperature difference is 15 K.

[0110] at this time ; .

[0111] Step S306: based on the heat dissipation power and heat exchange requirements, abnormal heat exchangers in the heat exchanger set are eliminated, and qualified heat exchangers are output.

[0112] It should be understood that step S306 is used to eliminate heat exchangers that cannot meet specific heat dissipation requirements, thereby ensuring the efficiency and reliability of the entire heat exchange network.

[0113] Step S307: moving the real-time coordinates of the qualified heat exchanger to the coordinate position of the industrial equipment.

[0114] It should be clear that step S307 is used to accurately locate the real-time coordinates of the qualified heat exchanger to the corresponding coordinate positions of the industrial equipment to achieve seamless connection between the heat exchanger and the equipment.

[0115] Step S400: Acquire a pipeline path set outside the industrial equipment inside the factory.

[0116] It should be clear that the method for obtaining the pipeline path set in the present invention includes:

[0117] Step S401: obtaining coordinate positions of a first heat exchanger and a second heat exchanger in a plane coordinate axis, wherein the first heat exchanger is the one with the highest heat exchange power among a plurality of radiators, and the second heat exchanger is the one with the lowest heat exchange power among a plurality of radiators;

[0118] Step S402: Obtain a pipeline path set between the first heat exchanger and the second heat exchanger in the plane coordinate axis, wherein the pipeline path set includes a plurality of pipeline paths, and the pipeline paths are used to connect all the heat exchangers and surround the industrial equipment inside the plant to form a heat exchange network.

[0119] It should be noted that the present invention obtains a pipeline path set through step S401 and step S402. In actual use, with the first heat exchanger as the starting point and the second heat exchanger as the end point, several curves connecting all heat exchangers and industrial equipment can be obtained. By setting high heat exchange power as the starting point and low heat exchange power as the end point, heat energy can be effectively transferred from high-demand equipment to low-demand equipment, which not only improves the heat exchange efficiency of the system, but also reduces energy loss and achieves more economical operation.

[0120] Specifically, the coordinates of the first heat exchanger are (10, 5), and the coordinates of the second heat exchanger are (30, 15). Through step S400, several pipeline paths may be designed as follows:

[0121] Path A: A straight line connects (10, 5) to (30, 15);

[0122] Path B: Move upward from (10, 5) to (10, 10), then move right to (30, 10), and finally move downward to (30, 15);

[0123] Path C: From (10, 5) first move right to (15, 5), then move up to (15, 15), and finally move right to (30, 15);

[0124] It should be added that the selection of each path can be based on the specific plant layout and equipment requirements, ultimately forming a complete pipeline network solution.

[0125] It is necessary to supplement step S400 that, in the actual operation process, the method for obtaining the pipeline path set also includes:

[0126] Step S410: Obtain the heat exchange power of all heat exchangers, and obtain the third heat exchanger based on the average value of the heat exchange power.

[0127] It should be clear that step S410 is used to achieve balanced distribution of heat in the entire heat exchange network to ensure the heat exchange efficiency between different heat exchangers.

[0128] Specifically, in step S410, the formula for obtaining the average heat exchange power is: ; Where Pavg is the average heat exchange power, pi is the heat exchange power of the i-th heat exchanger, and n is the total number of heat exchangers.

[0129] In the specific implementation of step S410, if there are four heat exchangers in the factory, their powers are 20kw, 30kw, 40kw and 50kw respectively.

[0130] at this time .

[0131] Step S420: The position of the third heat exchanger inside the plant is used as the initial point of the pipeline path.

[0132] Step S430: All heat exchangers except the third heat exchanger are arranged in an equidistant manner within the plane coordinate axis.

[0133] It should be clear that step S430 is used to achieve an effective spatial layout between heat exchangers to reduce pipeline length and reduce system complexity. By equidistant arrangement, it can be ensured that the distance between each heat exchanger is equal, so that heat transfer is more uniform and maintenance and operation are facilitated.

[0134] Step S440: Based on the positions of the first heat exchanger, the second heat exchanger and the third heat exchanger in the plane coordinate axis, a pipeline path set is obtained.

[0135] It should be clear that step S440 is used to further narrow the pipeline path set obtained in step S402.

[0136] It should be further supplemented that, in the process of constructing an actual heat exchange network, laying heat exchangers through industrial equipment can achieve more efficient heat exchange during actual operation. Therefore, in contrast to steps S410 to S440, the present invention also proposes a method for obtaining a pipeline path including steps S40A-S40D.

[0137] It should be noted that, in step S40A: obtaining the coordinates of the first industrial equipment, the first industrial equipment is the industrial equipment having the highest temperature inside the factory building.

[0138] Step S40B: Acquire the coordinates of the first industrial equipment, where the first industrial equipment is the industrial equipment with the highest temperature inside the factory building.

[0139] Step S40C: Based on the temperature difference between the first industrial equipment and the second industrial equipment, a thermal gradient of the pipeline path is obtained.

[0140] It should be clear that in the present invention, the method for obtaining temperature difference is realized by temperature sensors in the prior art. These sensors can accurately measure the surface temperature of different industrial equipment and transmit the data to the thermal gradient analysis module. The thermal gradient analysis module calculates the temperature difference based on these temperature data and uses this as a basis to determine the thermal gradient of the pipeline path.

[0141] It should also be added that the thermal gradient is obtained and arranged by installing heat from high to low.

[0142] Step S40D: Based on the thermal gradient and the efficiency requirements of the heat exchange network, all heat exchangers are connected and a pipeline path set is obtained.

[0143] It should be clear that in the present invention, the efficiency of the heat exchange network is artificially set to ensure that the thermal energy utilization of the entire plant reaches the optimal state.

[0144] Step S500: The pipeline path set outputs the optimal pipeline laying path based on the heat exchange network loading index.

[0145] It should be understood that in the present invention, the heat exchange network loading index includes: a distance index and a pipeline section number index, and the method for outputting the optimal pipeline laying path based on the distance index of the pipeline path set includes:

[0146] Step S501: Obtain a distance index value.

[0147] Step S502: convert the distance index value into a plane coordinate axis and output the conversion result.

[0148] Step S503: Obtain all distance sets of the pipeline path sets of the first heat exchanger and the second heat exchanger in the plane coordinate axis.

[0149] Step S504: Eliminate the distance set based on the conversion result, and output the optimal pipeline laying path, which is the pipeline path with the smallest value in the distance set.

[0150] It should be noted that the distance index value in step S502 is converted based on the scaling ratio set in step S204.

[0151] In addition, the method of outputting the optimal pipeline laying path based on the pipeline node number index of the pipeline path set includes:

[0152] Step S510: Obtain the pipeline node number index value.

[0153] Step S520: obtaining the number of pipelines in each pipeline path set based on all distance sets;

[0154] Step S530: Selecting a pipeline path whose number of pipelines and pipeline node number index values ​​match as the optimal pipeline laying path.

[0155] It should be noted that the present invention makes the construction of the heat exchange network more flexible and efficient through the two different optimal pipeline laying path methods in step S500. Specifically, the two methods focus on different optimization goals, one is based on distance optimization, and the other is based on the optimization of the number of pipeline sections. Through such a dual optimization strategy, it can ensure that the best balance between cost and efficiency is achieved while meeting specific engineering requirements.

[0156] Step S600: constructing a heat exchange network in the factory building based on the optimal pipeline laying path within the plane coordinate axis.

[0157] It should be noted that, in actual operation of the present invention, the method for obtaining the distance between the first heat exchanger and the second heat exchanger in the plane coordinate axis includes:

[0158] Get the positions of the first heat exchanger and the second heat exchanger on the plane coordinate axis (x1, y1), (x2, y2);

[0159] Based on the plane distance calculation formula, obtain the distance d between the first heat exchanger and the second heat exchanger;

[0160] The plane distance calculation formula is: .

[0161] For example, when the coordinates of the first heat exchanger are (x1, y1) = (10, 20) and the coordinates of the second heat exchanger are (x2, y2) = (30, 40), based on these coordinates, the distance d between the two heat exchangers is calculated to be √[(x2 - x1)² + (y2 -y1)²] = √[(30 - 10)² + (40 - 20)²] = √[20² + 20²] = √[400 + 400] = √800 ≈ 28.28 unit lengths.

[0162] In addition, the above method is supplemented by Figure 2 It can be seen that the present invention also proposes a heat exchange network construction system, which includes a location acquisition module for acquiring the location of industrial equipment inside the plant;

[0163] A coordinate mapping module is used to map the positions of industrial equipment inside the plant together with the positions of heat exchangers into the plane coordinate axes;

[0164] Heat exchange demand analysis and adjustment module, used to adjust the heat exchanger coordinates based on the heat exchange demand of industrial equipment;

[0165] The pipeline path planning module is used to obtain the pipeline path set outside the industrial equipment inside the factory;

[0166] The optimization calculation module outputs the optimal pipeline laying path based on the heat exchange network loading indicators;

[0167] The conversion module is used to convert the optimal pipeline laying path in the plane coordinate axis into the plant and build a heat exchange network.

[0168] It should be added that, in actual operation, a heat exchange network construction system also includes: a thermal gradient analysis module, which is used to evaluate the temperature difference between industrial equipment and optimize the thermal gradient of the pipeline path;

[0169] Real-time monitoring module, used to monitor the operation status of the heat exchange network and output the heat exchanger position and pipeline configuration information in real time;

[0170] The user interface module is used to provide a user interaction interface to display the layout and operation status of the heat exchange network.

[0171] It should be further explained that, in the actual application of a heat exchange network construction system disclosed in the present invention, the coordinate mapping module uses image recognition technology to realize the coordinate mapping function, which can automatically identify and record the precise positions of all industrial equipment and heat exchangers in the factory. By combining with three-dimensional modeling software, the module can generate a detailed internal structure diagram of the factory and accurately map the equipment position to the two-dimensional coordinate axis.

[0172] While the invention has been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made thereto without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims

1. A method for building a heat exchange network, comprising a plurality of heat exchangers, wherein the plurality of heat exchangers are scattered inside a plant, and wherein: Get the location of industrial equipment inside the factory; Map the positions of the industrial equipment inside the plant together with the positions of the heat exchangers into a plane coordinate axis, where the plane coordinate axis is constructed based on the plant space data, and the origin of the plane coordinate axis is the geometric center of the plant, and the horizontal and vertical coordinates of the plane coordinate axis represent the length and width directions of the plant respectively; Adjust the heat exchanger coordinates based on the heat exchange requirements of industrial equipment; Get the pipeline path set outside the industrial equipment inside the factory; The pipeline path set outputs the optimal pipeline laying path based on the heat exchange network carrying index; Building a heat exchange network in the plant based on the optimal pipeline laying path within the plane coordinate axis; The method for obtaining the pipeline path set includes: Obtaining coordinate positions of a first heat exchanger and a second heat exchanger in a plane coordinate axis, wherein the first heat exchanger is the one with the highest heat exchange power among the plurality of radiators, and the second heat exchanger is the one with the lowest heat exchange power among the plurality of radiators; A pipeline path set between the first heat exchanger and the second heat exchanger in the plane coordinate axis is obtained, where the pipeline path set includes a plurality of pipeline paths, and the pipeline paths are used to connect all the heat exchangers and surround the industrial equipment inside the plant to form a heat exchange network.

2. A heat exchange network construction method according to claim 1, characterized in that: The method for obtaining the pipeline path set includes: Obtain the heat exchange power of all heat exchangers, and obtain the third heat exchanger based on the average value of the heat exchange power; The location of the third heat exchanger inside the plant is used as the initial point of the pipeline path; All heat exchangers except the third heat exchanger are arranged in an equidistant manner within the plane coordinate axis; A pipeline path set is obtained based on the positions of the first heat exchanger, the second heat exchanger, and the third heat exchanger in the plane coordinate axis.

3. A heat exchange network construction method according to claim 1, characterized in that: The methods for obtaining pipeline paths include: Obtain the coordinates of the first industrial equipment, where the first industrial equipment is the industrial equipment with the highest temperature inside the factory building; Obtain the coordinates of the second industrial equipment, where the second industrial equipment is the industrial equipment with the lowest temperature inside the factory building; obtaining a thermal gradient of a pipeline path based on a temperature difference between the first industrial equipment and the second industrial equipment; Based on the thermal gradient and efficiency requirements of the heat exchange network, all heat exchangers are connected and a set of pipeline paths is obtained.

4. A heat exchange network construction method according to claim 1, characterized in that: The heat exchange network loading index includes: a distance index and a pipeline section number index. The method for outputting the optimal pipeline laying path based on the distance index of the pipeline path set includes: Get the distance indicator value; Convert the distance index value into the plane coordinate axis and output the conversion result; Obtain all distance sets of the first heat exchanger and the second heat exchanger in the pipeline path set in the plane coordinate axis; The distance set is eliminated based on the conversion result, and the optimal pipeline laying path is output. The optimal pipeline laying path is the pipeline path with the smallest value in the distance set.

5. A heat exchange network construction method according to claim 4, characterized in that: The method for outputting the optimal pipeline laying path based on the pipeline node number index of the pipeline path set includes: Get the value of the pipeline section number indicator; Obtain the number of pipelines in each pipeline path set based on all distance sets; The pipeline path with matching values ​​of the number of pipelines and the number of pipeline sections is selected as the optimal pipeline laying path.

6. A heat exchange network construction method according to claim 1, characterized in that: The method for obtaining the distance between the first heat exchanger and the second heat exchanger in the plane coordinate axis includes: Get the positions of the first heat exchanger and the second heat exchanger on the plane coordinate axis (x1, y1), (x2, y2); Based on the plane distance calculation formula, obtain the distance d between the first heat exchanger and the second heat exchanger; The plane distance calculation formula is: .

7. A heat exchange network construction method according to claim 1, characterized in that: Methods for mapping the locations of industrial equipment inside the plant together with the locations of heat exchangers into plane coordinate axes include: Get the internal area of ​​the factory building; Based on the internal area characteristics of the factory building, select the origin of the plane coordinate axis; Obtain the location of industrial equipment and heat exchangers inside the factory; Set the zoom ratio; The coordinates of the industrial equipment inside the plant and the heat exchanger in the plane coordinate axis are obtained based on the scaling ratio, the position of the industrial equipment inside the plant and the position of the heat exchanger.

8. A heat exchange network construction method according to claim 1, characterized in that: Methods for adjusting the heat exchanger coordinates include: Determine the priority of heat exchanger coordinate adjustment based on the heat exchange requirements of industrial equipment; Based on the priority results, arrange the heat exchanger coordinate adjustment order; Based on the properties of the industrial equipment, obtain the installation method between the heat exchanger and the industrial equipment; Based on the installation mode and the heat exchanger coordinate adjustment order, a matching heat exchanger set is obtained; Obtain the heat dissipation power of industrial equipment after matching the heat exchanger set; Based on the heat dissipation power and heat exchange requirements, abnormal heat exchangers in the heat exchanger set are eliminated, and qualified heat exchangers are output; The real-time coordinates of the qualified heat exchanger are moved to the coordinate position of the industrial equipment.

9. A heat exchange network construction system, using a heat exchange network construction as claimed in any one of claims 1 to 8, characterized in that: include: The location acquisition module is used to obtain the location of industrial equipment inside the factory; A coordinate mapping module is used to map the positions of industrial equipment inside the plant together with the positions of heat exchangers into the plane coordinate axes; Heat exchange demand analysis and adjustment module, used to adjust the heat exchanger coordinates based on the heat exchange demand of industrial equipment; The pipeline path planning module is used to obtain the pipeline path set outside the industrial equipment inside the factory; The optimization calculation module outputs the optimal pipeline laying path based on the heat exchange network loading indicators; The conversion module is used to convert the optimal pipeline laying path in the plane coordinate axis into the plant and build a heat exchange network.

10. A heat exchange network construction system according to claim 9, characterized in that: Also includes: Thermal gradient analysis module, used to evaluate temperature differences between industrial equipment and optimize thermal gradients in pipeline paths; Real-time monitoring module, used to monitor the operation status of the heat exchange network and output the heat exchanger position and pipeline configuration information in real time; The user interface module is used to provide a user interaction interface to display the layout and operation status of the heat exchange network.

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