Gas injection control methods, devices, electronic equipment, and storage media for tower cutting

Abstract

This invention provides a method, apparatus, electronic device, and storage medium for controlling supplementary gas supply during tower switching. The method includes: determining the coking dry gas flow rate, a first coking dry gas calorific value, and a second coking dry gas calorific value, wherein the first coking dry gas calorific value is the calorific value of the coking dry gas during the tower switching period, and the second coking dry gas calorific value is the calorific value of the coking dry gas during the normal operation period; determining the supplementary fuel gas flow rate based on the first coking dry gas calorific value, the second coking dry gas calorific value, and the supplementary fuel gas calorific value; determining the supplementary gas valve opening based on the supplementary fuel gas flow rate, and controlling the supplementary gas valve based on the supplementary gas valve opening. This invention considers the influence of the coking dry gas calorific value and the supplementary fuel gas calorific value on the supplementary fuel gas flow rate, thereby accurately determining the supplementary fuel gas flow rate, and further accurately determining the supplementary gas valve opening based on the supplementary fuel gas flow rate, achieving rapid and precise supplementary gas control.

Description

Technical Field

[0001] This invention relates to the field of gas pipeline technology, and in particular to a method, apparatus, electronic device, and storage medium for controlling gas supply to gas pipelines. Background Technology

[0002] The fuel gas pipeline network includes the inlet gas stream, the network itself, and the outlet gas stream. The network serves as both a fuel gas transportation unit and a storage unit. The impact of tower-cutting operations on the network can be analyzed using the following equivalent form: the network can be replaced by a tank. During the coking tower-cutting operation, the independent variable is the coking dry gas flow rate, and the dependent variable is the pressure. If the gas replenishment process is not considered during the tower-cutting process, the gas-consuming stream can be divided into streams 1 and 2, where the flow rate of stream 1 is equal to that of the inlet gas stream. Therefore, the model can be simplified to the tank's venting process, with the venting flow rate being: coking gas production during normal operation - coking gas production during tower-cutting operation. Assuming the gas pipeline network has an inner diameter of 300 mm and a total length of 10 km, the total volume is 706 m³. 3 The pipeline pressure is controlled at 0.5 MPa, and the gas capacity is 4236 Nm³. 3 The reduction in coking dry gas during tower cutting reached a maximum of 2400 Nm³. 3 / h. Such a release rate will rapidly lead to depressurization of the pipeline network. The tower shut-off time is approximately 2 hours, with an average release volume of approximately 1200 Nm³. 3 / h, if there is no gas replenishment operation during the tower cutting process, the pressure will drop to below 0.4MPa.

[0003] Since pipeline pressure is the dependent variable, and the gas pipeline network is long, pressure transmission takes time. Using this as the target variable for control leads to lag, resulting in pressure fluctuations. Current technology relies on manual experience for adjustment, which is not only labor-intensive but also lacks precision, making significant pressure fluctuations during gas replenishment inevitable.

[0004] In addition, since the calorific value of the supplementary fuel gas varies during tower cutting, using pressure as the control target has certain drawbacks. If the calorific value of the supplementary gas is greater than that of the coking dry gas, the flare needs to be vented when the supplementary gas supply ends; if the calorific value of the supplementary gas is less than that of the coking dry gas, the opening of the supplementary gas valve will need to be constantly adjusted to adapt to gas consumption. Summary of the Invention

[0005] This invention provides a tower-cutting gas replenishment control method, device, electronic device, and storage medium to solve the defects of low gas replenishment efficiency and accuracy in the prior art.

[0006] This invention provides a method for controlling gas supply during tower cutting, comprising:

[0007] Determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period.

[0008] The supplementary fuel gas flow rate is determined based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas.

[0009] Based on the replenishment fuel gas flow rate, the opening degree of the replenishment valve is determined, and the replenishment valve is controlled based on the opening degree of the replenishment valve.

[0010] According to the present invention, the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas are determined based on the energy conservation equation.

[0011] The energy conservation equation is determined based on the following steps:

[0012] Based on the gas flow direction of the circulation node in the gas pipeline network, the gas flow direction of the adjacent node is determined, where the adjacent node refers to the node connected to the circulation node.

[0013] Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, the energy conservation equation of the flow node is determined.

[0014] Based on the energy conservation equation, the energy of the flow node and the adjacent node is determined; the gas in the flow node and the adjacent node includes coking dry gas and / or supplementary fuel gas.

[0015] According to a gas supply control method for tower cutting provided by the present invention, determining the energy conservation equation of the flow node based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes includes:

[0016] Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, the gas composition of the flow node and the gas composition of the adjacent nodes are determined.

[0017] Based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas, the energy conservation equation of the flow node is determined.

[0018] According to a gas supply control method for a gas flow node provided by the present invention, determining the energy conservation equation for the flow node based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas includes:

[0019] Based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas, the energy of the flow node and the energy of the adjacent nodes are determined.

[0020] Based on the energy of the circulating node and the energy of the adjacent nodes, the energy conservation equation of the circulating node is constructed.

[0021] According to a tower-cutting gas supply control method provided by the present invention, determining the energy of the flow node and the energy of the adjacent nodes based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas includes:

[0022] Based on the gas composition of the flow node and the gas composition of the adjacent node, the gas material content of the flow node and the gas material content of the adjacent node are determined by utilizing the law of conservation of mass.

[0023] The energy of the flow node and the energy of the adjacent node are determined based on the gas and material content of the flow node, the gas and material content of the adjacent node, and the calorific value of each gas.

[0024] According to a method for controlling supplementary fuel gas supply in a tower-cutting process provided by the present invention, determining the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas includes:

[0025] Based on the calorific value of the first coking dry gas and the calorific value of the second coking dry gas, determine the calorific value variation data of the coking dry gas;

[0026] With the pressure at the downstream gas-consuming node within a preset range as a constraint, the supplementary fuel gas flow rate is determined based on the coking dry gas flow rate, the coking dry gas calorific value variation data, and the supplementary fuel gas calorific value.

[0027] According to a method for controlling gas supply to a tower according to the present invention, the method further includes controlling the gas supply valve based on the opening degree of the gas supply valve, and then further comprising:

[0028] If the pressure at the downstream gas-consuming node exceeds the preset range, the control mode of the gas replenishment valve will be switched to manual mode.

[0029] The present invention also provides a tower-cutting gas supply control device, comprising:

[0030] The data detection unit is used to determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period.

[0031] The data determination unit is used to determine the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas.

[0032] The gas replenishment control unit is used to determine the opening degree of the gas replenishment valve based on the gas replenishment flow rate, and to control the gas replenishment valve based on the gas replenishment valve opening degree.

[0033] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the tower cutting and gas supply control method as described above.

[0034] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the tower-cutting gas supply control method as described above.

[0035] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the tower-cutting gas supply control method as described above.

[0036] The present invention provides a method, apparatus, electronic device, and storage medium for controlling supplementary fuel gas during coking tower switching. Based on the calorific values ​​of a first coking dry gas, a second coking dry gas, and the supplementary fuel gas, the supplementary fuel gas flow rate is determined. This considers the influence of the calorific values ​​of the coking dry gas and the supplementary fuel gas on the supplementary fuel gas flow rate, thereby accurately determining the supplementary fuel gas flow rate. Furthermore, the opening degree of the supplementary fuel gas valve can be accurately determined based on the supplementary fuel gas flow rate, achieving rapid and precise supplementary gas control. Simultaneously, the embodiments of the present invention avoid the problem of supplementary gas lag caused by using pressure as the control target during coking tower switching in traditional methods. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic flowchart of the tower-cutting gas supply control method provided by the present invention;

[0039] Figure 2 This is one of the schematic diagrams of a gas pipeline network node provided by the present invention;

[0040] Figure 3 This is the second schematic diagram of a gas pipeline network node provided by the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the tower cutting gas supply control device provided by the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] This invention provides a method for controlling gas supply during tower cutting. Figure 1 This is a schematic flowchart of the tower-cutting gas supply control method provided by the present invention, as shown below. Figure 1 As shown, the method includes the following steps:

[0045] Step 110: Determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period.

[0046] Here, the first coking dry gas calorific value is the coking dry gas calorific value during the coking tower cutting period (i.e., the tower cutting operation period), and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period (i.e., the normal operation period without tower cutting operation).

[0047] When the coking tower is cut off, the coking dry gas flow rate can be obtained by a mass flow meter, and the first and second coking dry gas calorific values ​​can be obtained by a calorific value measuring instrument or by real-time calculation. This embodiment of the invention does not specifically limit these values.

[0048] Step 120: Determine the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas.

[0049] Specifically, based on the calorific values ​​of the first and second coking dry gas, the difference in calorific value between the tower-cutting period and the normal operating period can be determined, which can be understood as the calorific value variation data of the coking dry gas. Then, by combining the type of supplementary fuel gas, the calorific value of the supplementary fuel gas can be obtained, and further, by combining it with the calorific value of the coking dry gas, the flow rate of the supplementary fuel gas can be determined.

[0050] Step 130: Determine the opening degree of the make-up gas valve based on the make-up gas flow rate, and control the make-up gas valve based on the opening degree of the make-up gas valve.

[0051] Specifically, the supplementary fuel gas flow rate refers to the replenishment gas flow rate; the larger the supplementary fuel gas flow rate, the larger the opening of the replenishment valve. Therefore, in this embodiment of the invention, after determining the supplementary fuel gas flow rate, the opening of the replenishment valve is determined, and then the replenishment valve is controlled according to the opening of the replenishment valve. It can be understood that this embodiment of the invention controls the replenishment valve based on the principle of calorific value compensation to adjust the supplementary fuel gas flow rate.

[0052] Optionally, embodiments of the present invention can establish a linkage between the calorific value of coking dry gas, the flow rate of coking dry gas, and the calorific value and flow rate of supplementary fuel gas. Simultaneously, pressure constraints are set to ensure the gas pressure requirements of downstream gas-consuming nodes.

[0053] That is, F x =f[F coking H coking H x P n ]. F x To supplement the fuel gas flow, F coking H is the coking dry gas flow rate. coking H is the calorific value of coking dry gas. x To supplement the calorific value of the fuel gas, P n This is to meet the fuel gas pressure requirements of downstream units.

[0054] like Figure 2 As shown, node 1 produces gas for the self-owned power plant, node 2 produces coking dry gas, node 3 produces gas from the gas holder, node 4 produces propane gasification gas, and nodes 5-10 are downstream gas-consuming nodes. The coking dry gas flow rate can be measured by a mass flow meter, and the first and second calorific values ​​of the coking dry gas can be measured by a calorific value measuring instrument. The supplementary fuel gas flow rate can then be calculated, and the opening of the supplementary fuel gas valve can be determined based on the supplementary fuel gas flow rate to control the supplementary gas valve.

[0055] Optionally, for newly built fuel gas mixers, the propane gasification rate is adjusted, and the supplementary gas control method is as follows: the propane gasification rate is linked to the coking gas production rate, taking into account the difference in calorific value, and using downstream gas consumption nodes and pipeline pressure as constraints. Since the calorific values ​​of propane and coking dry gas are relatively constant, this control method is relatively stable. After coking tower shut-off, pressure control is switched to pressure control.

[0056] Optionally, dry gas from the gas holder is used as an initial adjustment method. Once the liquid level in the gas holder drops to a certain level, propane supplementation is used instead. The dry gas flow rate, calorific value, liquid level, compressor load, propane vaporization rate, calorific value, and coking gas production are interlocked, and the downstream unit and pipeline pressures are used as constraints. Since the composition of the gas in the gas holder may change, a fuel gas calorific value meter needs to be added. After coking tower cutting is completed, pressure control is switched to the new method.

[0057] Optionally, the gas consumption of the self-owned power plant can also be adjusted, and the gas consumption of the self-owned power plant is interlocked with the dry gas consumption of the coking tower.

[0058] The coking tower switching and replenishment gas control method provided in this invention determines the replenishment gas flow rate based on the calorific values ​​of the first coking dry gas, the second coking dry gas, and the replenishment fuel gas. This means it considers the influence of the calorific values ​​of the coking dry gas and the replenishment fuel gas on the replenishment gas flow rate, thereby accurately determining the replenishment gas flow rate. Furthermore, it accurately determines the opening degree of the replenishment gas valve based on the replenishment fuel gas flow rate, achieving rapid and precise replenishment gas control. Simultaneously, this invention avoids the problem of replenishment gas lag caused by using pressure as the control target during coking tower switching in traditional methods.

[0059] Based on the above embodiments, the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas are determined based on the energy conservation equation.

[0060] The energy conservation equation is determined based on the following steps:

[0061] Based on the gas flow direction of the circulation nodes in the gas pipeline network, the gas flow direction of adjacent nodes is determined. Adjacent nodes refer to nodes connected to the circulation nodes.

[0062] Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, the energy conservation equation of the flow node is determined.

[0063] Based on the energy conservation equation, the energy of the flow nodes and adjacent nodes is determined; the gases in the flow nodes and adjacent nodes include coking dry gas and / or supplementary fuel gas.

[0064] Specifically, the gas pipeline network includes flow nodes and adjacent nodes. The gas flowing through the flow nodes may include coking dry gas and / or supplementary fuel gas, and the gas flowing through adjacent nodes may also include coking dry gas and / or supplementary fuel gas. The energy of the gas flowing through each node follows the principle of energy conservation, that is, it satisfies the energy conservation equation, and the energy of the gas flowing through each node is determined based on the material content, calorific value, and composition of the gas. In other words, after determining the energy conservation equation, the energy of the gas flowing through each node can be obtained, and then the calorific value of each gas can be calculated based on this energy.

[0065] For ease of explanation, the following will use... Figure 3 The gas pipeline network in the image serves as an example to illustrate the process of constructing the energy conservation equation, such as... Figure 3 As shown, nodes 1, 7, and 8 are gas-producing nodes, nodes 2, 3, and 9 are gas-consuming nodes, and nodes 4, 5, and 6 are circulation nodes. Node 4 is a circulation node, and nodes 1 and 5 connected to node 4 are adjacent nodes. Node 5 is a circulation node, and nodes 2, 4, 6, and 8 connected to node 5 are adjacent nodes; node 6 is a circulation node, and nodes 3, 5, 7, and 9 connected to node 6 are adjacent nodes.

[0066] Assume node 1 in the gas pipeline network is a gas-producing node, meaning the gas flow direction at node 1 is known: gas flows out of node 1 and into node 4 (gas outflow). Given the known gas flow direction at node 1, the gas cannot flow in the opposite direction; therefore, the gas flow direction at node 4 is the same as the gas flowing into node 4 (gas inflow). Similarly, nodes 2, 3, and 9 are gas-consuming nodes, with a gas inflow direction; nodes 7 and 8 are gas-producing nodes, with a gas outflow direction.

[0067] Node 1 is a gas-producing node. Assume the energy of the gas flowing from node 1 to node 4 is Q. 1,4 =P1, since gas cannot flow backwards, meaning gas will not flow from node 4 to node 1, the energy of the gas flowing from node 4 to node 1 is Q. 4,1 =0. Similarly, node 7 is a gas-producing node, assuming the energy of the gas flowing from node 7 to node 6 is Q. 7,6 =P7, since gas cannot flow backwards, meaning gas will not flow from node 6 to node 7, the energy of the gas flowing from node 6 to node 7 is Q. 6,7 =0. Node 8 is a gas-producing node. Assume the energy of the gas flowing from node 8 to node 5 is Q. 8,5 =P8, since gas cannot flow backwards, meaning gas will not flow from node 5 to node 8, the energy of the gas flowing from node 5 to node 8 is Q. 5,8 =0.

[0068] Node 2 is a gas-consuming node. Assume the energy of the gas flowing from node 5 to node 2 is Q. 5,2 =C2, since gas cannot flow backwards, meaning gas will not flow from node 2 to node 5, the energy of the gas flowing from node 2 to node 5 is Q. 2,5 =0. Node 3 is a gas-consuming node. Assume the gas energy flowing from node 6 to node 3 is Q. 6,3 =C3, since gas cannot flow backwards, meaning gas will not flow from node 3 to node 6, the energy of the gas flowing from node 3 to node 6 is Q. 3,6 =0. Node 9 is a gas-consuming node. Assume the gas energy flowing from node 9 to node 6 is Q. 6,9 =C9, since gas cannot flow backwards, meaning no gas will flow from node 6 to node 9, the energy of the gas flowing from node 6 to node 9 is Q. 9,6 =0.

[0069] Furthermore, according to the law of conservation of energy, the energy of gas flowing into any node is equal to the energy of gas flowing out of that node. Therefore, the energy conservation equations for each flow node can be established as follows:

[0070] Node 4: Q 1,4 +Q 5,4 =Q 4,1 +Q 4,5

[0071] Node 5: Q 4,5 +Q 2,5 +Q 8,5 +Q 6,5 =Q 5,4 +Q 5,2 +Q 5,8 +Q 5,6

[0072] Node 6: Q 5,6 +Q 3,6 +Q 7,6 +Q 9,6 =Q 6,5 +Q 6,3 +Q 6,7 +Q 6,9

[0073] In the formula, Q m,n This represents the gas energy flowing from node m to node n. After establishing the energy conservation equation, and given the energies of other nodes in the equation, the energy of any node can be deduced, thus enabling real-time monitoring of the energy at each node.

[0074] Based on any of the above embodiments, the energy conservation equation for the flow node is determined based on the gas flow direction of the flow node and the gas flow direction of adjacent nodes, including:

[0075] Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, determine the gas composition of the flow node and the gas composition of the adjacent nodes.

[0076] Based on the gas composition of the flow node, the gas composition of adjacent nodes, and the calorific value of each gas, the energy conservation equation of the flow node is determined.

[0077] The energy conservation equations for the flow nodes are determined based on the gas composition of the flow nodes, the gas composition of adjacent nodes, and the calorific value of each gas. These equations include:

[0078] Based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas, the energy of the flow node and the energy of the adjacent nodes are determined.

[0079] Based on the energy of the circulating node and the energy of its neighboring nodes, an energy conservation equation for the circulating node is constructed.

[0080] Based on the gas composition of the flow node, the gas composition of adjacent nodes, and the calorific value of each gas, the energy of the flow node and the energy of adjacent nodes are determined, including:

[0081] Based on the gas composition of the flow node and the gas composition of adjacent nodes, the gas material content of the flow node and the gas material content of adjacent nodes are determined by utilizing the law of conservation of mass.

[0082] Based on the gas and material content of the flow node, the gas and material content of adjacent nodes, and the calorific value of each gas, the energy of the flow node and the energy of adjacent nodes are determined.

[0083] Specifically, the energy conservation equation for a flow node is determined based on the energy of the flow node and its neighboring nodes. The energy of a flow node or its neighboring nodes can be determined based on the following formula:

[0084] Q i,j =q i,j ∑(H m X i,m )

[0085] In the formula, Q i,j q represents the gas energy flowing from node i to node j. i,j The gaseous material content H flowing from node i to node j. m X represents the calorific value of a gas. i,m This indicates the gas composition. Furthermore, since the gas flow is irreversible, it is possible to obtain if Q... i,j If Q > 0, then Q j,i =0,q j,i =0.

[0086] The content of gaseous materials also follows the law of conservation of mass, that is, the material conservation equations for each flow node are:

[0087] Node 4: q 1,4 +q 5,4 =q 4,1 +q 4,5

[0088] Node 5: q 4,5 +q 2,5 +q 8,5 +q 6,5 =q 5,4 +q 5,2 +q 5,8 +q 5,6

[0089] Node 6: q 5,6 +q 3,6 +q 7,6 +q 9,6 =q 6,5 +q 6,3 +q 6,7 +q 6,9

[0090] Furthermore, the individual components at each distribution node also follow the law of conservation of mass, that is, the material conservation equation for the individual components at each distribution node is:

[0091] Node 4: q 1,4 X 1,m +q 5,4 X 5,m =(q 4,1 +q 4,5 )X 4,m

[0092] Node 5: q 4,5 X 4,m +q 2,5 X 2,m +q 8,5 X 8,m +q 6,5 X 6,m =(q 5,4 +q 5,2 +q 5,8 +q 5,6 )X 5,m Node 6: q 5,6 X 5,m +q 3,6 X 3,m +q 7,6 X 7,m +q 9,6 X 9,m =(q 6,5 +q 6,3 +q 6,7 +q 6,9 )X 6,m

[0093] Based on the above single-component material conservation equation, the gaseous material content of any one or more nodes can be determined, and then the gaseous material content of the remaining nodes can be obtained based on the above material conservation equation.

[0094] Next, based on the energy determination formula of the above-mentioned flow node or adjacent node, the energy of the flow node and the energy of the adjacent node are calculated, and then the energy conservation equation can be constructed based on the energy of the flow node and the energy of the adjacent node.

[0095] In this case, when the gas flow direction at a flow node is outward, the gas flow direction at adjacent nodes is inward. For example... Figure 3As shown, assuming node 1 in the gas pipeline network is a gas-producing node, meaning the gas flow direction of node 1 is known, it flows from node 1 out to node 4, i.e., gas outflow. Given the known gas flow direction of node 1, the gas cannot flow in the opposite direction; therefore, the gas flow direction of node 4 is the gas flowing from node 1 into node 4, i.e., gas inflow. Similarly, the gas flow direction of other adjacent nodes can be determined using the same method. It should be noted that the gas flow direction of gas-producing or gas-consuming nodes in the gas pipeline network is usually known. Therefore, after determining the gas flow direction of a gas-producing or gas-consuming node, the gas flow direction of the connecting nodes can be determined.

[0096] Based on any of the above embodiments, determining the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas includes:

[0097] Based on the first and second calorific values ​​of coking dry gas, determine the variation data of coking dry gas calorific value;

[0098] With the pressure at downstream gas-consuming nodes within a preset range as a constraint, the supplementary fuel gas flow rate is determined based on the coking dry gas flow rate, coking dry gas calorific value variation data, and supplementary fuel gas calorific value.

[0099] Specifically, controlling the supplementary gas valve may affect the pressure of downstream gas-consuming nodes. If the pressure of the downstream gas-consuming node is within a preset range, it indicates that the pressure of the downstream gas-consuming node is within a safe range; otherwise, there may be a risk of excessive pressure. Therefore, this embodiment of the invention uses the pressure of the downstream gas-consuming node within a preset range as a constraint condition, and determines the supplementary fuel gas flow rate based on the coking dry gas flow rate, coking dry gas calorific value variation data, and supplementary fuel gas calorific value, thereby ensuring the pressure safety of the downstream gas-consuming node.

[0100] Based on any of the above embodiments, the process of controlling the air supply valve based on the opening degree of the air supply valve further includes:

[0101] If the pressure at the downstream gas-consuming node exceeds the preset range, switch the control mode of the gas replenishment valve to manual mode.

[0102] Specifically, if the pressure at the downstream gas-consuming node exceeds the preset range after controlling the gas supply valve based on its opening degree, it indicates that the current pressure at the downstream gas-consuming node is too high or the gas supply rate is too slow when controlling the gas supply valve in automatic mode. In this case, the control mode of the gas supply valve can be switched to manual mode to manually control the opening degree of the gas supply valve and ensure that the pressure at the downstream gas-consuming node meets the preset range requirements. Optionally, a soft-switching unit can be installed on the gas supply valve to switch the control mode of the gas supply valve to manual or automatic mode.

[0103] The tower cutting and gas replenishment control device provided by the present invention is described below. The tower cutting and gas replenishment control device described below can be referred to in correspondence with the tower cutting and gas replenishment control method described above.

[0104] Based on any of the above embodiments, the present invention also provides a tower-cutting gas supply control device, such as... Figure 4 As shown, the device includes:

[0105] The data detection unit 410 is used to determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period.

[0106] The data determination unit 420 is used to determine the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas; wherein, the data determination unit 420 can also be connected and communicated with the distributed control system (DCS).

[0107] The gas replenishment control unit 430 is used to determine the opening degree of the gas replenishment valve based on the gas replenishment flow rate, and to control the gas replenishment valve based on the gas replenishment valve opening degree.

[0108] Based on any of the above embodiments, the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas are determined based on the energy conservation equation.

[0109] The device further includes:

[0110] The flow direction determination unit is used to determine the gas flow direction of adjacent nodes based on the gas flow direction of the flow nodes in the gas pipeline network, wherein the adjacent nodes refer to the nodes connected to the flow nodes.

[0111] The equation determination unit is used to determine the energy conservation equation of the flow node based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes.

[0112] An energy determination unit is used to determine the energy of the flow node and the adjacent nodes based on the energy conservation equation; the gas in the flow node and the adjacent nodes includes coking dry gas and / or supplementary fuel gas.

[0113] Based on any of the above embodiments, the equation determining unit includes:

[0114] A composition determination unit is used to determine the gas composition of the flow node and the gas composition of the adjacent nodes based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes.

[0115] The energy equation determination unit is used to determine the energy conservation equation of the flow node based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas.

[0116] Based on any of the above embodiments, the energy equation determination unit includes:

[0117] An energy determination unit is used to determine the energy of the flow node and the energy of the adjacent nodes based on the gas composition of the flow node, the gas composition of the adjacent nodes, and the calorific value of each gas.

[0118] The equation construction unit is used to construct the energy conservation equation of the flow node based on the energy of the flow node and the energy of the adjacent nodes.

[0119] Based on any of the above embodiments, the energy determination unit includes:

[0120] The material content determination unit is used to determine the gas material content of the flow node and the gas material content of the adjacent node based on the gas composition of the flow node and the gas composition of the adjacent node, using the principle of material conservation.

[0121] The energy determination subunit determines the energy of the flow node and the energy of the adjacent nodes based on the gas and material content of the flow node, the gas and material content of the adjacent nodes, and the calorific value of each gas.

[0122] Based on any of the above embodiments, the data detection unit 410 includes:

[0123] The calorific value detection unit is used to determine the calorific value variation data of coking dry gas based on the calorific value of the first coking dry gas and the calorific value of the second coking dry gas.

[0124] The flow calculation unit is used to determine the supplementary fuel gas flow rate based on the coking dry gas flow rate, the coking dry gas calorific value variation data, and the supplementary fuel gas calorific value, with the downstream gas consumption node pressure being within a preset range as a constraint.

[0125] Based on any of the above embodiments, the device further includes:

[0126] The switching unit is used to switch the control mode of the gas supply valve to manual mode when the pressure at the downstream gas consumption node exceeds the preset range after controlling the gas supply valve based on the opening degree of the gas supply valve.

[0127] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention, such as... Figure 5As shown, the electronic device may include a processor 510, a memory 520, a communication interface 530, and a communication bus 540, wherein the processor 510, memory 520, and communication interface 530 communicate with each other through the communication bus 540. The processor 510 can call logic instructions in the memory 520 to execute a tower-cutting and gas-supplementation control method, which includes: determining the coking dry gas flow rate, a first coking dry gas calorific value, and a second coking dry gas calorific value, wherein the first coking dry gas calorific value is the coking dry gas calorific value during the tower-cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period; determining the supplementary fuel gas flow rate based on the first coking dry gas calorific value, the second coking dry gas calorific value, and the supplementary fuel gas calorific value; determining the gas-supplementation valve opening degree based on the supplementary fuel gas flow rate, and controlling the gas-supplementation valve based on the gas-supplementation valve opening degree.

[0128] Furthermore, the logical instructions in the aforementioned memory 520 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0129] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer is able to execute the tower-cutting gas replenishment control method provided by the above methods, the method comprising: determining a coking dry gas flow rate, a first coking dry gas calorific value, and a second coking dry gas calorific value, wherein the first coking dry gas calorific value is the coking dry gas calorific value during the tower-cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period; determining a replenishment fuel gas flow rate based on the first coking dry gas calorific value, the second coking dry gas calorific value, and the replenishment fuel gas calorific value; determining a replenishment gas valve opening degree based on the replenishment fuel gas flow rate, and controlling the replenishment gas valve based on the replenishment gas valve opening degree.

[0130] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described tower-cutting and gas-supplementation control methods. The method includes: determining a coking dry gas flow rate, a first coking dry gas calorific value, and a second coking dry gas calorific value, wherein the first coking dry gas calorific value is the coking dry gas calorific value during the tower-cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period; determining a supplementary fuel gas flow rate based on the first coking dry gas calorific value, the second coking dry gas calorific value, and the supplementary fuel gas calorific value; determining a supplementary gas valve opening based on the supplementary fuel gas flow rate, and controlling the supplementary gas valve based on the supplementary gas valve opening.

[0131] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0132] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling gas supply during tower switching, characterized in that, include: Determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period. The supplementary fuel gas flow rate is determined based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas. Based on the replenishment fuel gas flow rate, determine the opening degree of the replenishment valve, and control the replenishment valve based on the opening degree of the replenishment valve; The calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas are determined based on the energy conservation equation; The energy conservation equation is determined based on the following steps: Based on the gas flow direction of the circulation node in the gas pipeline network, the gas flow direction of the adjacent node is determined, where the adjacent node refers to the node connected to the circulation node. Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, the gas composition of the flow node and the gas composition of the adjacent nodes are determined. Based on the gas composition of the flow node and the gas composition of the adjacent node, the gas material content of the flow node and the gas material content of the adjacent node are determined by utilizing the law of conservation of mass. Based on the gas and material content of the flow node, the gas and material content of the adjacent node, and the calorific value of each gas, the energy of the flow node and the energy of the adjacent node are determined. Based on the energy of the flow node and the energy of the adjacent nodes, construct the energy conservation equation for the flow node; Based on the energy conservation equation, the energy of the flow node and the adjacent nodes is determined; The gas in the flow node and the adjacent node includes coking dry gas and / or supplementary fuel gas.

2. The method for controlling gas supply to the tower according to claim 1, characterized in that, The step of determining the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas includes: Based on the calorific value of the first coking dry gas and the calorific value of the second coking dry gas, determine the calorific value variation data of the coking dry gas; With the pressure at the downstream gas-consuming node within a preset range as a constraint, the supplementary fuel gas flow rate is determined based on the coking dry gas flow rate, the coking dry gas calorific value variation data, and the supplementary fuel gas calorific value.

3. The tower-cutting gas supply control method according to claim 2, characterized in that, The method of controlling the air supply valve based on the opening degree of the air supply valve further includes: If the pressure at the downstream gas-consuming node exceeds the preset range, the control mode of the gas replenishment valve will be switched to manual mode.

4. A tower-cutting gas supply control device, characterized in that, include: The data detection unit is used to determine the coking dry gas flow rate, the first coking dry gas calorific value, and the second coking dry gas calorific value. The first coking dry gas calorific value is the coking dry gas calorific value during the tower cutting period, and the second coking dry gas calorific value is the coking dry gas calorific value during the normal operation period. The data determination unit is used to determine the supplementary fuel gas flow rate based on the calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas. The gas replenishment control unit is used to determine the opening degree of the gas replenishment valve based on the gas replenishment flow rate, and to control the gas replenishment valve based on the gas replenishment valve opening degree. The calorific value of the first coking dry gas, the calorific value of the second coking dry gas, and the calorific value of the supplementary fuel gas are determined based on the energy conservation equation; The energy conservation equation is determined based on the following steps: Based on the gas flow direction of the circulation node in the gas pipeline network, the gas flow direction of the adjacent node is determined, where the adjacent node refers to the node connected to the circulation node. Based on the gas flow direction of the flow node and the gas flow direction of the adjacent nodes, the gas composition of the flow node and the gas composition of the adjacent nodes are determined. Based on the gas composition of the flow node and the gas composition of the adjacent node, the gas material content of the flow node and the gas material content of the adjacent node are determined by utilizing the law of conservation of mass. Based on the gas and material content of the flow node, the gas and material content of the adjacent node, and the calorific value of each gas, the energy of the flow node and the energy of the adjacent node are determined. Based on the energy of the flow node and the energy of the adjacent nodes, construct the energy conservation equation for the flow node; Based on the energy conservation equation, the energy of the flow node and the adjacent nodes is determined; The gas in the flow node and the adjacent node includes coking dry gas and / or supplementary fuel gas.

5. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the tower-cutting gas supply control method as described in any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the tower-cutting gas supply control method as described in any one of claims 1 to 3.

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