A reaction system purging method, device, system and storage medium

Abstract

The present application discloses a reaction system purging method, device, system and storage medium to ensure the safety and reliability of the reaction system purging. The method comprises: obtaining preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging; adjusting the amount of nitrogen in the nitrogen buffer system connected to the reaction system according to the preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system; when the reaction system is in an emergency stop, the reaction system is purged with the nitrogen in the nitrogen buffer system. By adopting the solution provided in the present application, when the reaction system is in an emergency stop, the amount of nitrogen in the nitrogen buffer system meets the purging requirements of the reaction system, thereby ensuring the safety and reliability of the reaction system purging.

Description

Technical Field

[0001] The present application relates to the technical field of reaction system shutdown protection, and in particular to a reaction system purge method, device, system and storage medium. Background Art

[0002] Oxidation reactions are among the hazardous chemical processes subject to national regulation. Currently, oxidation reactors are typically equipped with tail oxygen content monitoring and nitrogen purge lines. During planned system shutdowns or emergency shutdowns due to abnormal operating conditions, nitrogen is typically used to purge the reactors, ensuring that the oxygen content within the system is reduced to a safe range. However, chemical production is currently operating in industrial parks. When a utility failure within an industrial park causes the simultaneous shutdown of various units, the instantaneous demand for nitrogen within the park surges. Due to the large number of users on the nitrogen pipeline network, reliable nitrogen purge supply cannot be guaranteed during emergency conditions.

[0003] Therefore, how to provide a purging method to ensure the safety and reliability of the reaction system purging. Summary of the Invention

[0004] The present application provides a reaction system purging method, device, system and storage medium to ensure the safety and reliability of reaction system purging.

[0005] The present application provides a reaction system purging method, comprising:

[0006] Obtaining preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging;

[0007] adjusting the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system;

[0008] When the reaction system is shut down urgently, the reaction system is purged by the nitrogen in the nitrogen buffer system.

[0009] The beneficial effect of the present application lies in: by obtaining preset parameters related to the reaction system and the amount of nitrogen required for purging, and adjusting the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to the preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system. Furthermore, when the reaction system experiences an emergency shutdown, the amount of nitrogen in the nitrogen buffer system meets the purging requirements of the reaction system, ensuring the safety and reliability of the reaction system purging.

[0010] In one embodiment, adjusting the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system includes:

[0011] Calculating a target nitrogen amount required to purge the reaction system according to preset parameters of the reaction system;

[0012] The amount of nitrogen in the nitrogen buffer system is adjusted to the target nitrogen amount.

[0013] In one embodiment, the calculating the target amount of nitrogen required to purge the reaction system according to the preset parameters of the reaction system includes:

[0014] Substitute the preset parameters of the reaction system into the following formula to calculate the target nitrogen amount required to purge the reaction system:

[0015]

[0016] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0017] In one embodiment, adjusting the amount of nitrogen in the nitrogen buffer system to the target amount of nitrogen includes:

[0018] Obtaining an actual nitrogen amount in the nitrogen buffer system;

[0019] The amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

[0020] In one embodiment, obtaining the actual nitrogen amount of the nitrogen buffer system includes:

[0021] Obtaining an operating pressure of a nitrogen buffer system and a volume of the nitrogen buffer system;

[0022] Substitute the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0023]

[0024] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0025] In one embodiment, adjusting the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system includes:

[0026] Calculating a first target pressure corresponding to the nitrogen buffer system according to preset parameters of the reaction system;

[0027] Injecting nitrogen into the nitrogen buffer system and recording the pressure of the nitrogen buffer system in real time;

[0028] When the pressure of the nitrogen buffer system reaches the first target pressure, it is determined that the amount of nitrogen in the nitrogen buffer system is adjusted completely.

[0029] In one embodiment, the calculating the first target pressure corresponding to the nitrogen buffer system according to the preset parameters of the reaction system includes:

[0030] The first target pressure corresponding to the nitrogen buffer system is calculated according to the following formula:

[0031]

[0032] Among them, P t is the first target pressure; P R is the operating pressure of the reaction system; V R is the total volume of the gas phase space of the reaction system; β is a constant used to define the multiples corresponding to different tail oxygen content ranges; V D is the volume of the nitrogen buffer system.

[0033] The present application also provides a reaction system purge device, comprising:

[0034] An acquisition module, configured to acquire preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging;

[0035] an adjustment module, configured to adjust the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system;

[0036] The purge module is used to purge the reaction system with the nitrogen in the nitrogen buffer system when the reaction system is in emergency shutdown.

[0037] In one embodiment, the adjustment module includes:

[0038] A first calculation submodule, configured to calculate a target nitrogen amount required for purging the reaction system according to preset parameters of the reaction system;

[0039] The adjustment submodule is used to adjust the nitrogen amount in the nitrogen buffer system to the target nitrogen amount.

[0040] In one embodiment, the calculation submodule is used to:

[0041] Substitute the preset parameters of the reaction system into the following formula to calculate the target nitrogen amount required to purge the reaction system:

[0042]

[0043] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0044] In one embodiment, the adjustment submodule is further configured to:

[0045] Obtaining an actual nitrogen amount in the nitrogen buffer system;

[0046] The amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

[0047] In one embodiment, obtaining the actual nitrogen amount of the nitrogen buffer system includes:

[0048] Obtaining an operating pressure of a nitrogen buffer system and a volume of the nitrogen buffer system;

[0049] Substitute the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0050]

[0051] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0052] In one embodiment, the adjustment module includes:

[0053] a second calculation submodule, configured to calculate a first target pressure corresponding to the nitrogen buffer system according to preset parameters of the reaction system;

[0054] an injection submodule, configured to inject nitrogen into the nitrogen buffer system and record the pressure of the nitrogen buffer system in real time;

[0055] The determination submodule is configured to determine that the adjustment of the nitrogen amount in the nitrogen buffer system is complete when the pressure of the nitrogen buffer system reaches the first target pressure.

[0056] In one embodiment, the second calculation submodule is further configured to:

[0057] The first target pressure corresponding to the nitrogen buffer system is calculated according to the following formula:

[0058]

[0059] Among them, P t is the first target pressure; P R is the operating pressure of the reaction system; V R is the total volume of the gas phase space of the reaction system; β is a constant used to define the multiples corresponding to different tail oxygen content ranges; V D is the volume of the nitrogen buffer system.

[0060] The present application also provides a reaction system purge system, comprising:

[0061] at least one processor; and,

[0062] a memory communicatively connected to the at least one processor; wherein,

[0063] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the reaction system purging method described in any one of the above embodiments.

[0064] The present application also provides a computer-readable storage medium. When the instructions in the storage medium are executed by a processor corresponding to the reaction system purge system, the reaction system purge system can implement the reaction system purge method described in any of the above embodiments.

[0065] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0066] The technical solution of the present application is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0068] Figure 1 This is a flow chart of a reaction system purging method in one embodiment of the present application;

[0069] Figure 2 This is a structural diagram of a nitrogen buffer system in one embodiment of the present application;

[0070] Figure 3 This is a logical relationship diagram of the set points of the four-level pressure protection scheme of the nitrogen buffer system in one embodiment of the present application;

[0071] Figure 5 This is a structural diagram of a reaction system purge device in one embodiment of the present application;

[0072] Figure 4 This is a schematic diagram of a nitrogen purge pipeline design for a nitrogen buffer system in one embodiment of the present application;

[0073] Figure 6 This is a schematic diagram of the hardware structure of a reaction system purge system in one embodiment of the present application. DETAILED DESCRIPTION

[0074] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0075] In order to ensure that the reaction system has sufficient purge nitrogen, avoid affecting the nitrogen supply of the reaction system when a public utility failure occurs in the park, and avoid causing an impact on the park pipeline network and affecting the nitrogen supply of other users when the reaction system is shut down and the demand for nitrogen is too large, in this application, the reaction system is designed with a nitrogen buffer system connected to it, and by real-time monitoring of some operating parameters of the reaction system and the nitrogen buffer system, the gas storage capacity of the nitrogen buffer system can be dynamically adjusted.

[0076] Figure 1 This is a flow chart of a reaction system purging method according to an embodiment of the present application. Figure 1 As shown, the method can be implemented as the following steps S101-S103:

[0077] In step S101, the preset parameters of the reaction system are obtained, wherein the preset parameters are parameters related to the amount of nitrogen required for purging;

[0078] In order to determine the amount of nitrogen required to purge the reaction system, in this application, it is necessary to obtain the preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purge, specifically including but not limited to the total volume of the gas phase space of the reaction system, the oxygen content in the exhaust gas of the reaction system monitored in real time, the target oxygen content after the reaction system is purged, the volume of the nitrogen buffer system, the nitrogen content in the nitrogen buffer system, and the operating pressure of the nitrogen buffer system, etc.

[0079] It is understood that the reaction system in this application may be a single reactor or multiple reactors. When the reaction system includes multiple reactors, whether the reactor is in operation can be determined by real-time monitoring of the operating parameters of the reactor. For example, when the feed flow rate, operating temperature, and pressure are each higher than a preset value, the reactor is characterized as being in operation. When there are multiple operating reactors, the preset parameters of the reaction system include the preset parameters of each reactor.

[0080] In step S102, the amount of nitrogen in the nitrogen buffer system connected to the reaction system is adjusted according to the preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after the adjustment reaches the amount of nitrogen required for purging the current reaction system;

[0081] In this application, there are several methods for adjusting the nitrogen in the nitrogen buffer system:

[0082] Method 1:

[0083] The target nitrogen amount required for purging the reaction system is determined according to the preset parameters of the reaction system, and the nitrogen amount in the nitrogen buffer system is adjusted according to the required target nitrogen amount.

[0084] Specifically, the target nitrogen amount required for purging the reaction system is calculated by substituting the preset parameters of the reaction system into a preset corresponding relationship. In one embodiment of the present application, the target nitrogen amount is calculated by the following formula:

[0085]

[0086] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system. When there are multiple operating reactors, it is the sum of the gas phase spaces of each operating reactor. C1 is the oxygen content in the tail gas of the reaction system monitored in real time. C2 is the target oxygen content after the reaction system is purged.

[0087] Then, the amount of nitrogen in the nitrogen buffer system is adjusted to the target nitrogen amount. There are many ways to adjust the nitrogen amount, and this embodiment provides two methods:

[0088] Adjustment method 1:

[0089] Adjustments are made based on the difference between the actual nitrogen volume in the current system and the target nitrogen volume.

[0090] During the adjustment process, the actual nitrogen amount of the nitrogen buffer system is obtained. In one embodiment of the present application, the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are monitored, and the operating pressure and the volume of the nitrogen buffer system are substituted into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0091]

[0092] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0093] The amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

[0094] Adjustment method 2:

[0095] In another embodiment of the present application, the corresponding nitrogen buffer system pressure is determined according to the target nitrogen amount, and the nitrogen amount in the nitrogen buffer system is adjusted according to the corresponding nitrogen buffer system pressure.

[0096] The second target pressure corresponding to the target nitrogen amount is determined according to a pre-stored correspondence relationship, wherein the pre-stored correspondence relationship is a correspondence relationship between the nitrogen pressure of the nitrogen buffer system and the nitrogen amount in the nitrogen buffer system. The correspondence relationship may be a relationship equation between the nitrogen amount and the nitrogen buffer system pressure. For example, the corresponding nitrogen buffer system pressure is calculated in real time according to the following equation:

[0097]

[0098] Among them, P T is the second target pressure; V NSP is the target nitrogen volume; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0099] Of course, the corresponding relationship may also be a preset numerical correspondence table of nitrogen amounts and nitrogen buffer system pressures, and the corresponding nitrogen buffer system pressure may be determined by querying the numerical correspondence table.

[0100] Inject nitrogen into the nitrogen buffer system and record the pressure of the nitrogen buffer system in real time. Record the real-time pressure of the nitrogen buffer system through the pressure sensor in the nitrogen buffer system to determine whether there is enough nitrogen in the system. When the real-time pressure of the nitrogen buffer system is greater than or equal to the second target pressure, it means that there is enough nitrogen for purging, and no adjustment is made; when the real-time pressure of the nitrogen buffer system is less than the second target pressure, it means that there is insufficient nitrogen for purging the reaction system, and it is necessary to supplement nitrogen to the nitrogen buffer system through the high-pressure grade nitrogen pipeline network in the park. When the pressure of the nitrogen buffer system reaches the second target pressure, it is determined that the amount of nitrogen in the nitrogen buffer system has been adjusted.

[0101] Method 2:

[0102] The amount of nitrogen in the nitrogen buffer system connected to the reaction system is adjusted according to the preset parameters of the reaction system. The pressure corresponding to the nitrogen buffer system can also be directly determined based on the preset parameters of the reaction system, and then the amount of nitrogen in the nitrogen buffer system is adjusted.

[0103] The first target pressure corresponding to the nitrogen buffer system is calculated according to the preset parameters of the reaction system. Specifically, the first target pressure corresponding to the nitrogen buffer system is calculated according to the following formula:

[0104]

[0105] Among them, P t is the first target pressure; P R is the operating pressure of the reaction system. If each reactor is set to equal pressure, then P R The real-time monitored tail gas system pressure can be used; if each reactor is set with independent pressure control, then P R Take the maximum value of the real-time monitoring pressure of each reactor; V R is the total volume of the gas phase space of the reaction system. When there are multiple reactors in operation, it is the sum of the gas phase space volumes of all operating reactors. β is a constant used to define the multiples corresponding to different tail oxygen content ranges. The recommended value range is 1.5 to 3. The system can automatically query from a pre-set corresponding relationship table based on the real-time monitored oxygen content. Of course, a functional relationship between the tail oxygen content and the safety margin multiple can also be formulated according to needs. This application does not limit the method for determining this relationship. V D is the volume of the nitrogen buffer system.

[0106] Inject nitrogen into the nitrogen buffer system and record the pressure of the nitrogen buffer system in real time. After determining the first target pressure corresponding to the nitrogen buffer system, start injecting nitrogen into the nitrogen buffer system, and at the same time, record the real-time pressure of the nitrogen buffer system through the pressure sensor in the nitrogen buffer system to determine whether there is enough nitrogen in the system. When the real-time pressure of the nitrogen buffer system is greater than or equal to the first target pressure, it means that there is enough purge nitrogen, and no adjustment is made; when the real-time pressure of the nitrogen buffer system is less than the first target pressure, it means that there is insufficient nitrogen to purge the reaction system, and it is necessary to supplement the nitrogen buffer system with a certain amount of reduced pressure nitrogen through the high-pressure grade nitrogen pipeline network in the park as purge and replacement nitrogen when the oxidation reaction system is shut down. When the pressure of the nitrogen buffer system reaches the first target pressure, it is determined that the amount of nitrogen in the nitrogen buffer system has been adjusted.

[0107] Of course, an operating pressure controller can also be installed on the air inlet pipe from the park to the nitrogen buffer tank, and the operating pressure controller can be set to the above-mentioned first target pressure. Then, when the pressure in the nitrogen buffer device is lower than the first target pressure, nitrogen can be automatically replenished.

[0108] In step S103, when the reaction system experiences an emergency shutdown, the reaction system is purged with nitrogen in the nitrogen buffer system.

[0109] In the present application, since a sufficient amount of purge nitrogen is stored in the nitrogen buffer system connected to the reaction system, when the reaction system is shut down in an emergency, the nitrogen in the nitrogen buffer system can be used to purge the reaction system.

[0110] Figure 2 This is a schematic diagram of the structure of a nitrogen buffer system in an embodiment of the present application. In this embodiment, the nitrogen buffer system includes a nitrogen buffer tank, the nitrogen buffer system is connected to the reaction system, and the nitrogen buffer system is adjusted by the above-mentioned method 2. Specifically, the first target pressure that the nitrogen buffer system should correspond to is determined by the above-mentioned method 2, and the set value SP of the operating pressure controller PIC-001 is set to 001 Set as the first target pressure to achieve dynamic adjustment of gas storage capacity. When the nitrogen in the nitrogen reaction system is insufficient, the pressure of the nitrogen reaction system is less than the set value SP of the operating pressure controller PIC-001. 001 , the park pipeline network automatically replenishes nitrogen.

[0111] It should be noted that in Figure 2 In the embodiment shown, in order to further ensure the safety of the nitrogen buffer system, the minimum design pressure value P of the nitrogen buffer system is determined by the following formula: Omin :

[0112]

[0113] Among them, P Omin The reference value of the minimum operating pressure of the nitrogen buffer tank should be guaranteed to be the design pressure P of the nitrogen buffer tank. D >P Omin ;P Ro is the operating pressure of the reaction system; V Rmax is the maximum gas phase space volume of the reaction system; x is the number of system replacement requirements, which can be customized by the user and is set to 3 by default; y is the safety margin coefficient, which can be customized by the user and is set to 1.5 by default; V t is the volume of the nitrogen buffer system.

[0114] exist Figure 2 In the nitrogen buffer system shown in the figure, in order to ensure the safety of the nitrogen buffer system, the design pressure P D Within the scope, a four-level pressure protection scheme is set up. Figure 3 This is a logical relationship diagram of the set points of the four-level pressure protection scheme of the nitrogen buffer system in one embodiment of the present application, as shown in FIG. Figure 3 As shown:

[0115] Level 1 pressure protection solution: The valve PV-01 is controlled by the pressure controller PIC-001 to reduce the high-pressure nitrogen in the park and store it in the nitrogen buffer tank;

[0116] Secondary pressure protection scheme: valve PV-02 is controlled by pressure controller PIC-002 to properly discharge nitrogen when the pressure in the nitrogen buffer tank is higher than the first preset value;

[0117] Three-level pressure protection scheme: through the II-level limit interlock function I-001 of the pressure instrument PIAS-004, when the buffer tank pressure exceeds the second preset value, the high-pressure nitrogen feed valve XV-01 is cut off, wherein the second preset value is greater than the first preset value;

[0118] Four-level pressure protection solution: Pressure relief valve PSV-001, used for emergency pressure relief protection through the safety valve when the pressure of the nitrogen buffer tank is higher than the third preset value, where the third preset value is greater than the second preset value.

[0119] exist Figure 2 The nitrogen buffer system shown in the figure also has a protection scheme for the reaction system. Since the nitrogen buffer system is a high-pressure system relative to the reaction system, a two-stage pressure reduction and safety protection scheme is set on the outlet pipeline of the nitrogen buffer system when purging the reaction system to avoid overpressure in the reaction system:

[0120] Primary protection solution: Control valve PV-03 through pressure controller PIC-003 to reduce the pressure of buffered nitrogen before delivering it to downstream users;

[0121] Secondary protection solution: Pressure relief valve PSV-002, used for emergency pressure relief protection through the safety valve when PIC-003 decompression fails.

[0122] By designing a two-stage protection scheme for the gas outlet pipeline, the purge nitrogen gas is decompressed to avoid overpressure in the reaction system.

[0123] In addition, in order to ensure effective nitrogen purge and isolation of links in the reaction system where oxygen may be retained and leaked during the shutdown process, this application also designs a special shutdown nitrogen purge pipeline. Figure 4 FIG. 1 is a schematic diagram of a nitrogen purge pipeline design for a nitrogen buffer system in one embodiment of the present application. Figure 4 As shown, this application mainly designs nitrogen purge pipelines for two key links involving oxygen in the oxidation reaction system:

[0124] (1) Nitrogen protection design for the air feed pipeline. In conventional designs, the air feed valves FV-01 and XV-03 are cut off when the oxidation reaction system is shut down. Since the valves may have internal leakage, when air continues to leak in, the reaction system forms an explosive mixed gas. At this time, the cut-off valves still cannot ensure effective isolation of the air. Therefore, the nitrogen protection design for the air feed pipeline of this technical solution is as follows:

[0125] a) Between the air feed valves FV-01 and XV-03, a small-diameter emergency nitrogen purge pipeline is installed, and a nitrogen charging valve XV-04 and a flow-restricting orifice plate RO-002 are provided to limit the flow of nitrogen;

[0126] b) A small-diameter vent line is installed between the air feed valves FV-01 and XV-03, and a vent valve XV-05 is configured to be opened when the reaction system is shut down. Even if air leaks internally, it will be discharged into the atmosphere first, essentially reducing the possibility of air leaking into the reactor.

[0127] (2) Nitrogen protection design of the reactor.

[0128] a) Planned shutdown to purge the pipeline. During the normal shutdown of the reaction system, use the tail oxygen content analyzer AICAS cascade nitrogen flow controller FIC-002 to control the valve FV-02 to perform a planned purge of the reaction system according to the actual tail oxygen control requirements;

[0129] b) Emergency nitrogen purge line. When an emergency condition occurs where the tail oxygen content exceeds the limit, the nitrogen flow rate is increased by opening valve XV-02 (in conjunction with the flow-restricting orifice RO-001 to limit the maximum flow of nitrogen) to quickly purge the reaction system.

[0130] In this application, different levels of nitrogen purge control strategies are implemented on the system according to the actual tail oxygen content in the oxidation reaction system: In order to improve the reliability of the system tail oxygen content monitoring, Figure 4 The reactor gas phase and exhaust pipelines shown are equipped with three online oxygen analyzers, which are set at AICAS-001, and perform 2oo3 logic voting. The three-level response of tail oxygen content is set as Level I (H), Level II (HH) and Level III (HHH), among which:

[0131] (1) When the tail oxygen content is Level I, it is used to alarm the operator and the necessary adjustment and control can be carried out through the predetermined disposal plan.

[0132] (2) Parking interlock I-002: When the oxygen content monitored by the oxygen content analyzer AICAS-001 is Level II (HH), or when the first stop button on the auxiliary console is triggered or other interlock parking conditions are triggered, the following response procedures and actions are automatically executed:

[0133] a) Cut off the air feed valves XV-03 and FV-01 of the oxidation reaction system;

[0134] b) The solenoid valve of the nitrogen purge valve FV-02 is energized, and under the action of the AICAS-001 cascade FIC-002 control loop, the control valve FV-02 replaces the system with nitrogen and reduces the oxygen content.

[0135] (3) Parking interlock I-003: When the oxygen content monitored by the oxygen content analyzer AICAS-001 is Level III (HHH), or the second parking button on the auxiliary console is triggered, the following response procedures and actions are automatically executed:

[0136] a) Open the emergency nitrogen purge valve XV-02 to perform emergency purge on the oxidation reaction system;

[0137] b) Open the nitrogen filling valve XV-04 and the venting valve XV-05 on the air feed pipeline, and perform nitrogen injection and venting protection between the air feed pipeline XV-03 and FV-01 to ensure that air will not continue to leak into the reactor due to internal leakage of the valve, thereby achieving effective isolation.

[0138] During shutdown, when safety interlocks I-002 or I-003 are activated, if the oxygen content in the reactor tail, detected by the AICAS-001 instrument, remains below the expected safe oxygen content value (this safe oxygen content value is determined based on the material properties) for a period of time (usually no less than 15 minutes), the nitrogen purge will be automatically stopped. Simultaneously, a message to stop the nitrogen purge will be sent to the operator.

[0139] The beneficial effects of the present application are as follows: by obtaining preset parameters related to the reaction system and the amount of nitrogen required for purging, and adjusting the amount of nitrogen in the nitrogen buffer system connected to the reaction system according to the preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system. Furthermore, when the reaction system is shut down in an emergency, the amount of nitrogen in the nitrogen buffer system meets the purge demand of the reaction system, ensuring the safety and reliability of the purge of the reaction system. At the same time, it avoids the impact on the park pipeline network caused by excessive nitrogen demand when the reaction system is shut down in the event of a utility failure in the park, which affects the nitrogen supply to other users.

[0140] In one embodiment, the above step S102 may be implemented as the following steps A1-A2:

[0141] In step A1, a target nitrogen amount required for purging the reaction system is calculated according to preset parameters of the reaction system;

[0142] In step A2, the amount of nitrogen in the nitrogen buffer system is adjusted to the target nitrogen amount.

[0143] In this embodiment, the target nitrogen amount required for purging the reaction system is first determined based on the preset parameters of the reaction system. Specifically, the target nitrogen amount required for purging the reaction system is calculated by substituting the preset parameters of the reaction system into a preset corresponding relationship. In this embodiment, the target nitrogen amount is calculated using the following formula:

[0144]

[0145] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0146] There are many ways to adjust the nitrogen volume. This application provides two methods:

[0147] Adjustment method 1:

[0148] During the adjustment process, it is necessary to first obtain the actual nitrogen amount of the nitrogen buffer system. Specifically, the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are obtained. The operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are substituted into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0149]

[0150] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0151] Then, the nitrogen amount in the nitrogen buffer system is adjusted to the target nitrogen amount according to the difference between the actual nitrogen amount in the nitrogen buffer system and the target nitrogen amount. NSP and the measured value V NPV The difference e, that is, e = V NPV -V NSP When e ≥ 0, the nitrogen buffer system has sufficient nitrogen reserves and no refilling is required. When e < 0, the nitrogen reserves are insufficient and refilling is required. The smaller the e value, the wider the nitrogen refill valve opening. This ensures that the nitrogen buffer system's gas storage capacity can meet the nitrogen demand for purging and inerting after the unit shuts down and depressurizes.

[0152] Adjustment method 2:

[0153] In the present application, the amount of nitrogen in the nitrogen buffer system is adjusted to the target nitrogen amount. In addition to the above adjustment method, the amount of nitrogen in the nitrogen buffer system can also be adjusted according to the following method:

[0154] The second target pressure corresponding to the target nitrogen amount is determined based on a pre-stored correspondence, wherein the pre-stored correspondence is a correspondence between the nitrogen pressure of the nitrogen buffer system and the nitrogen amount in the nitrogen buffer system. The correspondence can be a relationship between the nitrogen amount and the nitrogen buffer system pressure, and the corresponding nitrogen buffer system pressure is calculated in real time based on the target nitrogen amount; the correspondence can also be a pre-set numerical correspondence table of nitrogen amount and nitrogen buffer system pressure, and the corresponding nitrogen buffer system pressure is determined by querying the numerical correspondence table. Nitrogen is injected into the nitrogen buffer system, and the pressure of the nitrogen buffer system is recorded in real time. When the pressure of the nitrogen buffer system reaches the second target pressure, it is determined that the nitrogen amount in the nitrogen buffer system has been adjusted.

[0155] In one embodiment, the above step A1 may be implemented as follows:

[0156] Substitute the preset parameters of the reaction system into the following formula to calculate the target nitrogen amount required to purge the reaction system:

[0157]

[0158] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0159] In this example, when the reaction system is purged with nitrogen, the purging process can be abstracted as follows: nitrogen is continuously introduced from one end of the container and the mixed gas is discharged from the other end, thereby reducing the oxygen content to the target value. Therefore, assuming that the gases are completely mixed in the container and the volume flow rates at the container inlet and outlet are equal during the purging process, the rate of reduction of oxygen in the system during the purging process is:

[0160]

[0161] Where V is the container volume; t is the purge time; Q v is the volume flow rate; C is the oxygen content in the container; C0 is the oxygen content in the inlet / inert gas.

[0162] After conversion, we can get:

[0163]

[0164] Integrating both ends of the above equation yields the total nitrogen demand:

[0165]

[0166] Therefore, the volume of nitrogen required to reduce the oxygen concentration from C1 to C2 is:

[0167]

[0168] For this model, it is assumed that the nitrogen used for purging does not contain oxygen, then C0 = 0; the amount of nitrogen that the nitrogen buffer system needs to store is V NSP =Q v ·t;V R is the volume of the container; C1 is the real-time monitored oxygen content, which can be obtained by monitoring the online oxygen analyzer of the reaction system; C2 is the target oxygen content after purging.

[0169] Therefore, in this application, the preset parameters of the reaction system are substituted into the following formula to calculate the target nitrogen amount required to purge the reaction system:

[0170]

[0171] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0172] In one embodiment, the above step A2 may be implemented as the following steps A21-A22:

[0173] In step A21, the actual nitrogen amount of the nitrogen buffer system is obtained;

[0174] In step A22, the amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

[0175] In this embodiment, the actual nitrogen amount of the nitrogen buffer system is obtained. Specifically, the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are obtained, and the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are substituted into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0176]

[0177] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0178] Then, the nitrogen amount in the nitrogen buffer system is adjusted to the target nitrogen amount according to the difference between the actual nitrogen amount in the nitrogen buffer system and the target nitrogen amount. NSP and the measured value V NPV The difference e, that is, e = V NPV -V NSP When e ≥ 0, the nitrogen buffer system has sufficient nitrogen reserves and no refilling is required. When e < 0, the nitrogen reserves are insufficient and refilling is required. The smaller the e value, the wider the nitrogen refill valve opening. This ensures that the nitrogen buffer system's gas storage capacity can meet the nitrogen demand for purging and inerting after the unit shuts down and depressurizes.

[0179] In one embodiment, the above step A21 may be implemented as the following steps A211-A212:

[0180] In step A211, the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are obtained;

[0181] In step A212, the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system are substituted into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0182]

[0183] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0184] In one embodiment, the above step S102 may also be implemented as the following steps B1-B3:

[0185] In step B1, a first target pressure corresponding to the nitrogen buffer system is calculated according to preset parameters of the reaction system;

[0186] In step B2, nitrogen is injected into the nitrogen buffer system, and the pressure of the nitrogen buffer system is recorded in real time;

[0187] In step B3, when the pressure of the nitrogen buffer system reaches the first target pressure, it is determined that the adjustment of the nitrogen amount in the nitrogen buffer system is complete.

[0188] In this embodiment, after determining the first target pressure corresponding to the nitrogen buffer system, nitrogen is injected into the nitrogen buffer system. Simultaneously, the real-time pressure of the nitrogen buffer system is recorded by a pressure sensor in the nitrogen buffer system to determine whether sufficient nitrogen exists in the system. When the real-time pressure of the nitrogen buffer system is greater than or equal to the first target pressure, it indicates that sufficient nitrogen is present for purge, and no adjustment is made. When the real-time pressure of the nitrogen buffer system is less than the first target pressure, it indicates that insufficient nitrogen is available for purge of the reaction system. Therefore, it is necessary to supplement the nitrogen buffer system with a certain amount of reduced-pressure nitrogen, using the high-pressure nitrogen pipeline network in the industrial park as a nitrogen source, for purge and replacement nitrogen when the oxidation reaction system is shut down.

[0189] When the pressure of the nitrogen buffer system reaches the first target pressure, it is determined that the nitrogen amount in the nitrogen buffer system has been adjusted. When the real-time pressure of the nitrogen buffer system is less than the first target pressure, it means that there is insufficient nitrogen for purging the reaction system. When nitrogen is replenished through the park nitrogen pipeline network, the pressure of the nitrogen buffer system is monitored in real time. When the real-time pressure of the nitrogen buffer system reaches the first target pressure, it means that there is sufficient nitrogen for purging, and the adjustment operation is stopped.

[0190] When the reaction system experiences an emergency shutdown, the reaction system is purged using the nitrogen in the nitrogen buffer system. Because the nitrogen buffer system connected to the reaction system stores a sufficient amount of purge nitrogen, the nitrogen in the nitrogen buffer system can complete the purge of the reaction system when the reaction system experiences an emergency shutdown.

[0191] In one embodiment, the above step B1 may be implemented as follows:

[0192] The first target pressure corresponding to the nitrogen buffer system is calculated according to the following formula:

[0193]

[0194] Among them, P t is the first target pressure; P R is the operating pressure of the reaction system; V R is the total volume of the gas phase space of the reaction system; β is a constant used to define the multiples corresponding to different tail oxygen content ranges; V D is the volume of the nitrogen buffer system.

[0195] Figure 5 This is a schematic structural diagram of a purge device for a reaction system in one embodiment of the present application. Figure 5 As shown, the device includes:

[0196] An acquisition module 501 is used to acquire preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging;

[0197] An adjustment module 502 is configured to adjust the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system;

[0198] The purge module 503 is used to purge the reaction system with the nitrogen in the nitrogen buffer system when the reaction system is in emergency shutdown.

[0199] In one embodiment, the adjustment module includes:

[0200] A first calculation submodule, configured to calculate a target nitrogen amount required for purging the reaction system according to preset parameters of the reaction system;

[0201] The adjustment submodule is used to adjust the nitrogen amount in the nitrogen buffer system to the target nitrogen amount.

[0202] In one embodiment, the calculation submodule is used to:

[0203] Substitute the preset parameters of the reaction system into the following formula to calculate the target nitrogen amount required to purge the reaction system:

[0204]

[0205] Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

[0206] In one embodiment, the adjustment submodule is further configured to:

[0207] Obtaining an actual nitrogen amount in the nitrogen buffer system;

[0208] The amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

[0209] In one embodiment, the adjustment submodule is further configured to:

[0210] determining a second target pressure corresponding to the target nitrogen amount according to a pre-stored correspondence relationship, wherein the pre-stored correspondence relationship is a correspondence relationship between the nitrogen pressure of the nitrogen buffer system and the nitrogen amount in the nitrogen buffer system;

[0211] Injecting nitrogen into the nitrogen buffer system and recording the pressure of the nitrogen buffer system in real time;

[0212] When the pressure of the nitrogen buffer system reaches the second target pressure, it is determined that the amount of nitrogen in the nitrogen buffer system is adjusted completely.

[0213] In one embodiment, obtaining the actual nitrogen amount of the nitrogen buffer system includes:

[0214] Obtaining an operating pressure of a nitrogen buffer system and a volume of the nitrogen buffer system;

[0215] Substitute the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system into the following formula to determine the actual nitrogen amount of the nitrogen buffer system:

[0216]

[0217] Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

[0218] In one embodiment, the adjustment module includes:

[0219] a second calculation submodule, configured to calculate a first target pressure corresponding to the nitrogen buffer system according to preset parameters of the reaction system;

[0220] an injection submodule, configured to inject nitrogen into the nitrogen buffer system and record the pressure of the nitrogen buffer system in real time;

[0221] The determination submodule is configured to determine that the adjustment of the nitrogen amount in the nitrogen buffer system is complete when the pressure of the nitrogen buffer system reaches the first target pressure.

[0222] In one embodiment, the second calculation submodule is further configured to:

[0223] The first target pressure corresponding to the nitrogen buffer system is calculated according to the following formula:

[0224]

[0225] Among them, P t is the first target pressure; P R is the operating pressure of the reaction system; V R is the total volume of the gas phase space of the reaction system; β is a constant used to define the multiples corresponding to different tail oxygen content ranges; V D is the volume of the nitrogen buffer system.

[0226] Figure 6 FIG. 1 is a schematic diagram of the hardware structure of a purge system of a reaction system in one embodiment of the present application. Figure 6 As shown, the reaction system purge system includes:

[0227] at least one processor 620; and,

[0228] A memory 604 in communication with the at least one processor 620; wherein,

[0229] The memory 604 stores instructions that can be executed by the at least one processor 620 . The instructions are executed by the at least one processor 620 to implement the reaction system purging method described in any of the above embodiments.

[0230] Reference Figure 6 The reaction system purge system 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input / output (I / O) interface 612 , a sensor component 614 , and a communication component 616 .

[0231] The processing component 602 generally controls the overall operation of the reaction system purge system 600. The processing component 602 may include one or more processors 620 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 602 may include one or more modules to facilitate interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.

[0232] The memory 604 is configured to store various types of data to support the operation of the reaction system purge system 600. Examples of such data include instructions for any application or method operating on the reaction system purge system 600, such as text, images, videos, etc. The memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0233] The power assembly 606 provides power to the various components of the reaction system purge system 600. The power assembly 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the onboard control system 600.

[0234] The multimedia component 608 includes a screen that provides an output interface between the reaction system purge system 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 may also include a front camera and / or a rear camera. When the reaction system purge system 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0235] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC) that is configured to receive external audio signals when the reaction system purge system 600 is in an operating mode, such as an alarm mode, a recording mode, a voice recognition mode, and a voice output mode. The received audio signals may be further stored in the memory 604 or transmitted via the communication component 616. In some embodiments, the audio component 610 further includes a speaker for outputting audio signals.

[0236] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0237] Sensor assembly 614 includes one or more sensors for providing various status assessments of reaction system purge system 600. For example, sensor assembly 614 may include an acoustic sensor. Additionally, sensor assembly 614 may detect the open / closed state of reaction system purge system 600, the relative positioning of components, such as a display and keypad of reaction system purge system 600. Sensor assembly 614 may also detect the operating state of reaction system purge system 600 or its components, the position or acceleration / deceleration of reaction system purge system 600, and temperature changes of reaction system purge system 600. Sensor assembly 614 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 614 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 614 may also include an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0238] The communication component 616 is configured to enable the reaction system purge system 600 to provide the ability to communicate with other devices and cloud platforms in a wired or wireless manner. The reaction system purge system 600 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0239] In an exemplary embodiment, the reaction system purge system 600 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the reaction system purge method described in any of the above embodiments.

[0240] The present application also provides a computer-readable storage medium. When the instructions in the storage medium are executed by a processor corresponding to the reaction system purge system, the reaction system purge system can implement the reaction system purge method described in any of the above embodiments.

[0241] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) that contain computer-usable program code.

[0242] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0243] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0244] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0245] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A reaction system purging method, characterized in that: include: Obtaining preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging; adjusting the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system; When the reaction system is shut down in an emergency, the reaction system is purged with nitrogen in the nitrogen buffer system; The adjusting the amount of nitrogen in the nitrogen buffer system connected to the reaction system according to the preset parameters of the reaction system includes: Calculating a target nitrogen amount required to purge the reaction system according to preset parameters of the reaction system; adjusting the amount of nitrogen in the nitrogen buffer system to the target nitrogen amount; The calculating the target amount of nitrogen required to purge the reaction system according to the preset parameters of the reaction system includes: Substitute the preset parameters of the reaction system into the following formula to calculate the target nitrogen amount required to purge the reaction system: Among them, V NSP is the target nitrogen volume; V R is the total volume of the gas phase space of the reaction system; C1 is the oxygen content in the tail gas of the reaction system monitored in real time; and C2 is the target oxygen content after the reaction system is purged.

2. The method according to claim 1, wherein The adjusting the amount of nitrogen in the nitrogen buffer system to the target amount of nitrogen includes: Obtaining an actual nitrogen amount in the nitrogen buffer system; The amount of nitrogen in the nitrogen buffer system is adjusted to the target amount of nitrogen according to the difference between the actual amount of nitrogen in the nitrogen buffer system and the target amount of nitrogen.

3. The method according to claim 2, wherein The obtaining of the actual nitrogen amount of the nitrogen buffer system comprises: Obtaining an operating pressure of a nitrogen buffer system and a volume of the nitrogen buffer system; Substitute the operating pressure of the nitrogen buffer system and the volume of the nitrogen buffer system into the following formula to determine the actual nitrogen amount of the nitrogen buffer system: Among them, V NPV is the actual nitrogen amount of the nitrogen buffer system; P D is the operating pressure of the nitrogen buffer system; P0 is the atmospheric pressure; V D is the volume of the nitrogen buffer system.

4. A reaction system purging device for performing the reaction system purging method according to any one of claims 1 to 3, characterized in that: include: An acquisition module, configured to acquire preset parameters of the reaction system, wherein the preset parameters are parameters related to the amount of nitrogen required for purging; an adjustment module, configured to adjust the amount of nitrogen in a nitrogen buffer system connected to the reaction system according to preset parameters of the reaction system, so that the amount of nitrogen in the nitrogen buffer system after adjustment reaches the amount of nitrogen required for purging the current reaction system; The purge module is used to purge the reaction system with the nitrogen in the nitrogen buffer system when the reaction system is in emergency shutdown.

5. A reaction system purge system, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to implement the reaction system purging method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by a processor corresponding to the reaction system purge system, the reaction system purge system can implement the reaction system purge method according to any one of claims 1 to 3.

Images