Dryer regeneration method, device and system and storage medium

Abstract

The invention discloses a dryer regeneration method, device and system and a storage medium, and the method comprises the steps: detecting an operation stage corresponding to a main program in a process that the main program executes dryer switching regeneration; when it is detected that the main program runs to the pressure relief stage, the main program is controlled to stop running; performing pressure relief operation on the dryer through the auxiliary program; when the pressure relief operation on the dryer through the auxiliary program is completed, cold blowing operation is executed on the dryer through the auxiliary program, and the auxiliary program is used for automatically controlling a pressure relief valve to conduct pressure relief operation on the dryer and automatically controlling a cold and hot regeneration air valve to conduct cold blowing operation on the dryer; and when the cold blowing operation of the auxiliary program on the dryer is finished, the main program is controlled to continue to run, so that the switching operation of the dryer is realized. By adopting the scheme provided by the invention, automatic control of pressure relief and cold blowing operation can be realized.

Description

Technical Field

[0001] The present application relates to the field of engineering control technology, and in particular to a dryer regeneration method, device, system and storage medium. Background Art

[0002] The cracking gas compression system mainly includes three parts: cracking gas compression, acid gas removal and cracking gas drying. The main function of the dryer is to use the adsorption selectivity of the molecular sieve to remove water from the cracking gas to avoid ice or hydrate formation in the distillation low-temperature system, which will block the low-temperature system. The regeneration operation mode of the dryer is to pass dry methane gas that is not adsorbed by the molecular sieve. The methane gas passes through the water-containing molecular sieve bed, and after heating and purging, the adsorbed water molecules are desorbed, thereby reducing the water content of the molecular sieve, thereby restoring the original adsorption capacity. The switching regeneration process of the dryer is complex, including four processes: gas combination (the switching process between the operating station and the standby station when the front cracking gas enters), drainage / pressure relief / cold blowing (regeneration preparation after the switched operating station stops fresh feeding), regeneration (using fuel gas to dry and regenerate the dryer bed), cooling and standby (making the regenerated dryer meet the quasi-conditions for re-use).

[0003] In the prior art, sequential control is generally used for automatic operation. However, in the current sequential control program, the pressure relief and cold blowing operations still require the staff to manually control the valve opening, that is, the existing pressure relief and cold blowing operations still require manual control. Summary of the invention

[0004] The present application provides a dryer regeneration method, device, system and storage medium for realizing automatic control of pressure relief and cold blowing operations.

[0005] The present application provides a dryer regeneration method, comprising:

[0006] During the dryer switching regeneration process executed by the main program, the corresponding operation phase of the main program is detected;

[0007] When it is detected that the main program is running to the pressure relief stage, the main program is controlled to be suspended;

[0008] Perform pressure relief operation on the dryer through the sub-program;

[0009] When the pressure relief operation of the dryer is completed through the sub-program, a cold blowing operation is performed on the dryer through the sub-program, wherein the sub-program is used to automatically control the pressure relief valve to perform the pressure relief operation on the dryer and automatically control the cold and hot regeneration gas valves to perform the cold blowing operation on the dryer;

[0010] When the cold blowing operation of the dryer is completed through the sub-program, the main program is controlled to continue running to realize the switching operation of the dryer.

[0011] The beneficial effect of the present application is that when the main program runs to the pressure relief stage, the main program can be controlled to pause, and the pressure relief and cold blowing operations are performed through the sub-program. Since the sub-program can automatically control the pressure relief valve to perform pressure relief operations on the dryer and automatically control the hot and cold regeneration gas valves to perform cold blowing operations on the dryer, the pressure relief and cold blowing operations are performed by the sub-program instead of the main program, thereby realizing automatic control of the pressure relief and cold blowing operations. Moreover, while optimizing the pressure relief and cold blowing operations, there is no need to modify the main program, thereby reducing the difficulty of program optimization.

[0012] In one embodiment, the step of performing a pressure relief operation on the dryer through a sub-program includes:

[0013] Determine the minimum number of discharges required to discharge the material in the dryer to the downstream fuel gas network;

[0014] Determining the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network according to the minimum number of discharges of the material in the dryer to the downstream fuel gas pipeline network;

[0015] Determine a single discharge flow rate according to the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network;

[0016] Determine the opening of the pressure relief valve based on the single discharge flow rate;

[0017] Determining the opening time of the pressure relief valve according to the opening degree of the pressure relief valve;

[0018] The pressure relief valve is controlled to perform a valve opening operation according to the valve opening time of the pressure relief valve.

[0019] In one embodiment, determining the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network includes:

[0020] Calculate the volume flux of the downstream equipment with the largest fluctuation within the tolerable range;

[0021] Calculate the volume of material in the dryer converted to downstream pressure;

[0022] The quotient of the volume converted from the material in the dryer to the downstream pressure and the volume flux of the downstream equipment that fluctuates once at the maximum within the tolerable range is determined as the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network.

[0023] In one embodiment, the step of calculating the maximum volume flux of the downstream device that fluctuates once within an acceptable range includes:

[0024] The volume flux of the downstream equipment with the maximum fluctuation within the tolerable range is calculated according to the following first preset formula:

[0025]

[0026] Among them, F max is the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t snax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

[0027] In one embodiment, the calculation converts the material in the dryer to a volume at a downstream pressure, including:

[0028] The material in the dryer is converted to volume at downstream pressure using the following second preset formula:

[0029]

[0030] Among them, P 1 is the pressure of the dryer, P 2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 It is the volume that converts the material in the dryer into the downstream pressure.

[0031] In one embodiment, determining the opening of the pressure relief valve according to a single discharge flow rate includes:

[0032] Substitute the single discharge flow into the following third preset formula to calculate the opening of the pressure relief valve:

[0033]

[0034] Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the control valve, x is the valve opening of the pressure relief valve, ε is the expansion coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

[0035] In one embodiment, the performing of a cold blowing operation on the dryer through a sub-program includes:

[0036] Determine the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after material mixing;

[0037] Determine the output calculated by the mixed regeneration gas temperature controller according to the target temperature of the mixed regeneration gas, and determine the output calculated by the mixed regeneration gas total flow controller according to the target total flow of the mixed regeneration gas;

[0038] Substitute the output calculated by the mixed regeneration gas temperature controller into the following fourth preset formula:

[0039]

[0040] Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ c is the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h The real-time opening of the hot regeneration gas valve;

[0041] Substitute the output calculated by the mixed regeneration gas total flow controller into the following fifth preset formula:

[0042]

[0043] Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas;

[0044] Solving the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve according to the equation group consisting of the fourth preset formula and the fifth preset formula;

[0045] The cold regeneration gas valve and the hot regeneration gas valve are controlled according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve respectively.

[0046] The present application also provides a dryer regeneration device, comprising:

[0047] A detection module is used to detect the corresponding operation stage of the main program during the dryer switching regeneration process executed by the main program;

[0048] The first control module is used to control the main program to stop running when it is detected that the main program runs to the pressure relief stage;

[0049] A pressure relief module, used for performing a pressure relief operation on the dryer through a sub-program;

[0050] A cold blowing module, used for performing a cold blowing operation on the dryer through a sub-program when the pressure relief operation on the dryer is completed through a sub-program, wherein the sub-program is used for automatically controlling the pressure relief valve to perform a pressure relief operation on the dryer and automatically controlling the cold and hot regeneration gas valves to perform a cold blowing operation on the dryer;

[0051] The second control module is used to control the main program to continue running when the cold blowing operation of the dryer is completed through the sub-program, so as to realize the switching operation of the dryer.

[0052] In one embodiment, the pressure relief module comprises:

[0053] The first determination submodule is used to determine the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network;

[0054] A second determination submodule is used to determine the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network according to the minimum number of discharges of the material in the dryer to the downstream fuel gas pipeline network;

[0055] The third determination submodule is used to determine a single discharge flow rate according to the actual discharge times of discharging the material in the dryer to the downstream fuel gas pipeline network;

[0056] A fourth determination submodule, used to determine the opening of the pressure relief valve according to a single discharge flow rate;

[0057] a fifth determination submodule, configured to determine an opening time of the pressure relief valve according to an opening degree of the pressure relief valve;

[0058] The first control submodule is used to control the pressure relief valve to perform a valve opening operation according to the valve opening time of the pressure relief valve.

[0059] In one embodiment, the first determining submodule is further configured to:

[0060] Calculate the volume flux of the downstream equipment with the largest fluctuation within the tolerable range;

[0061] Calculate the volume of material in the dryer converted to downstream pressure;

[0062] The quotient of the volume converted from the material in the dryer to the downstream pressure and the volume flux of the downstream equipment that fluctuates once at the maximum within the tolerable range is determined as the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network.

[0063] In one embodiment, the step of calculating the maximum volume flux of the downstream device that fluctuates once within an acceptable range includes:

[0064] The volume flux of the downstream equipment with the maximum fluctuation within the tolerable range is calculated according to the following first preset formula:

[0065]

[0066] Among them, F max is the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t smax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

[0067] In one embodiment, the calculation converts the material in the dryer to a volume at a downstream pressure, including:

[0068] The material in the dryer is converted to volume at downstream pressure using the following second preset formula:

[0069]

[0070] Among them, P 1 is the pressure of the dryer, P 2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 It is the volume that converts the material in the dryer into the downstream pressure.

[0071] In one embodiment, the fourth determining submodule is further used to:

[0072] Substitute the single discharge flow into the following third preset formula to calculate the opening of the pressure relief valve:

[0073]

[0074] Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the control valve, x is the valve opening of the pressure relief valve, ε is the expansion coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

[0075] In one embodiment, the cold blowing module comprises:

[0076] The sixth determination submodule is used to determine the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after the materials are mixed;

[0077] A seventh determination submodule, for determining the output calculated by the mixed regeneration gas temperature controller according to the target temperature of the mixed regeneration gas, and determining the output calculated by the mixed regeneration gas total flow controller according to the target total flow of the mixed regeneration gas;

[0078] Substitute a submodule for substituting the output calculated by the mixed regeneration gas temperature controller into the following fourth preset formula:

[0079]

[0080] Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ c is the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h It is the real-time opening of the hot regeneration gas valve;

[0081] The submodule is also used to substitute the output calculated by the mixed regeneration gas total flow controller into the following fifth preset formula:

[0082]

[0083] Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas;

[0084] A solving submodule, used for solving the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve according to the equation group consisting of the fourth preset formula and the fifth preset formula;

[0085] The first control submodule is used to control the cold regeneration gas valve and the hot regeneration gas valve according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve respectively.

[0086] The present application also provides a dryer regeneration system, comprising:

[0087] at least one processor; and,

[0088] a memory communicatively connected to the at least one processor; wherein,

[0089] 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 dryer regeneration method described in any of the above embodiments.

[0090] 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 dryer regeneration system, the dryer regeneration system can implement the dryer regeneration method described in any of the above embodiments.

[0091] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0092] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] 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:

[0094] Figure 1 This is a flow chart of a dryer regeneration method in one embodiment of the present application;

[0095] Figure 2 This is a schematic diagram of the structure of a dryer in one embodiment of the present application;

[0096] Figure 3This is a schematic diagram of a regeneration gas flow control method in a main program design scheme in an embodiment of the present application;

[0097] Figure 4 This is a schematic diagram of a regeneration gas flow control method in a sub-program design scheme in an embodiment of the present application;

[0098] Figure 5 This is a flow chart of a dryer regeneration method in one embodiment of the present application;

[0099] Figure 6 This is a schematic diagram of the hardware structure of a dryer regeneration system in one embodiment of the present application. DETAILED DESCRIPTION

[0100] 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.

[0101] Figure 1 Flow chart of a dryer regeneration method in one embodiment of the present application, as shown in Figure 1 As shown, the method can be implemented as the following steps S101-S105:

[0102] In step S101, during the dryer switching regeneration process executed by the main program, the operation phase corresponding to the main program is detected;

[0103] In step S102, when it is detected that the main program runs to the pressure relief stage, the main program is controlled to be suspended;

[0104] In step S103, a pressure relief operation is performed on the dryer through a sub-routine;

[0105] In step S104, when the pressure relief operation of the dryer is completed through the sub-program, a cold blowing operation is performed on the dryer through the sub-program, wherein the sub-program is used to automatically control the pressure relief valve to perform the pressure relief operation on the dryer and automatically control the cold and hot regeneration gas valves to perform the cold blowing operation on the dryer;

[0106] In step S105, when the cold blowing operation of the dryer is completed through the sub-program, the main program is controlled to continue running to implement the switching operation of the dryer.

[0107] Taking the cracking gas compression system corresponding to the ethylene unit as an example, assuming that the ethylene unit has a total of two cracking gas dryers, the main function is to use the adsorption selectivity of the molecular sieve to remove water from the cracking gas to avoid ice or hydrate formation in the distillation low-temperature system, which will block the low-temperature system. The regeneration operation mode of the cracking gas dryer is to pass dry methane gas that is not adsorbed by the molecular sieve. The methane gas passes through the water-containing molecular sieve bed, and after heating and purging, the adsorbed water molecules are desorbed, thereby reducing the water content of the molecular sieve, thereby restoring the original adsorption capacity. The two gas-phase cracking gas dryers in the compression process of the ethylene unit are regenerated and used periodically, and the switching cycle is 4 days. The gas-phase dryer is located in the middle of the entire ethylene unit process. The upstream connection compressor and fuel gas pipeline network are closely related to the COP and COT of the cracking furnace, and the downstream connection high-removal tower is highly correlated with the towers of the separation unit. The switching and regeneration process of the dryer is complex, including four processes: gas mixing (the switching process between the operating table and the standby table when the front cracking gas enters), liquid discharge / pressure relief / cold blowing (regeneration preparation after the switched operating table stops fresh feeding), regeneration (using fuel gas to dry and regenerate the dryer bed), cooling and standby (making the regenerated dryer ready for use again). Generally, sequential control is used for automatic operation. The schematic diagram of the dryer structure is shown in the figure. Figure 2 As shown, the original program instructions for the "drainage / pressure relief / cold blowing" stage are as follows:

[0108] 1. Open the drain valve of the dryer, and close the drain valve after a certain period of time;

[0109] 2. Open the dryer pressure relief valve;

[0110] 3. When the dryer pressure drops to a specified pressure difference with the pressure of the first suction tank, close the pressure relief valve;

[0111] 4. Set the regeneration gas flow rate and open the regeneration gas charging valve; after a certain period of time, close the exhaust valve (the inlet valve is a double valve setting, and the exhaust valve is led out between the two valves to prevent pressure build-up), and open the regeneration gas inlet valve;

[0112] 5. When the dryer pressure rises to the specified pressure difference with the regeneration gas main pressure, close the exhaust valve and open the regeneration gas outlet valve;

[0113] 6. The regeneration gas flow rate increases from the initial value to the end value within the specified time; then cold blowing for a certain period of time;

[0114] 7. Verify that the regeneration gas outlet temperature is within the specified temperature difference from the inlet temperature;

[0115] The pressure relief process is mainly in steps 2-3, which releases the cracking gas and regeneration gas (fuel gas) to the compressor inlet. Due to the large pressure relief valve and fast pressure relief speed, it causes interference to the upstream and downstream: the suction pressure of the compressor fluctuates, the pressure at the top of the high-removal tower fluctuates, and the liquid level of the reflux tank of the tail gas distillation tower of the separation system fluctuates; currently, it is necessary to manually suspend the sequential control (i.e. the main program) and manually adjust the pressure relief valve step by step to achieve stable pressure relief. The cold blowing process is mainly in steps 4-7, using cold fuel gas to purge the cracking gas in the dryer to the fuel gas system. Due to the large design of the flow meter of the cold fuel gas, the indication is not displayed at low flow. When the sequential control performs cold blowing, the valve moves quickly after the cold blowing flow setting value is directly given, which interferes with the system: COT fluctuations, fuel gas pipeline pressure fluctuations, fuel gas calorific value fluctuations, accelerating the coking rate of the cracking furnace, cracking depth fluctuations, and shortening the operation cycle. If the regenerated bed is not depressurized slowly enough, the molecular sieve will continue to expand and contract during the heating and cooling process, and the wear between the molecular sieves will cause it to continue to pulverize. The temperature will drop too low, causing the desiccant and equipment to become cold and brittle. This process has strict requirements on the operating skills of personnel and is highly risky. There is currently no research and development optimization of related control technologies. Secondly, the smooth operation of the dryer requires a large number of operators, who need to pay continuous attention to key parameters, and the operation tolerance rate is low. At the same time, different personnel have different experiences in operating key parameters, and the operation brings a large impact on the equipment itself, which is easy to cause fluctuations in the downstream separation system.

[0116] To solve the above-mentioned problem, in the present application, during the execution of the dryer switching regeneration process by the main program, the corresponding operation stage of the main program is detected; when it is detected that the main program is running to the pressure relief stage, the main program is controlled to suspend operation; specifically, before the main program gives the pressure relief valve command, the pressure relief valve mode is changed to separate the pressure relief valve from the control of the main program, and the valve monitoring function of the main program is used to automatically suspend the main program in the pressure relief link.

[0117] Among them, the valve modes include "MAN (Manual, manual mode), AUTO (Automatic, automatic mode), CAS (Centralized Automatic Sequence, centralized automatic mode) and RCAS (Remote Centralized Automatic Sequence, remote centralized automatic mode). In MAN mode, the opening and closing of the valve requires manual operation. In AUTO mode, the opening and closing of the valve is automatically completed by the automatic control system. In CAS mode, the opening and closing of multiple valves are automatically completed by the central automatic control system in a predetermined order. The RCAS mode is similar to CAS, but the central automatic control system can be controlled from a remote location. During the program running, all the equipment required for the automatic operation of the program is obtained, including pressure relief valves, inflation valves, regeneration gas flow circuits, etc. When the main program is running, all equipment instructions are issued and executed in "RCAS" mode is used. If the valve mode changes, the command cannot be sent and executed normally. In addition, the main and sub-programs are both equipped with status monitoring functions. If the command is not sent and executed properly due to mode mismatch, an error alarm will be triggered and the program pause command will be triggered to automatically pause the program. Therefore, when the main program runs to the "liquid discharge / pressure relief / cold blow" stage, the pressure relief valve mode is changed from "RCAS" to "AUTO". When the program runs to the command to open the pressure relief valve, the main program automatically detects that the valve is out of the control range and automatically pauses, and releases all the occupied devices of the main program, thereby pausing the main program.

[0118] After the main program is paused, the sub-program takes over and occupies various equipment including the pressure relief valve. At this time, the pressure relief valve is actuated by the sub-program instruction, and the pressure relief operation is performed on the dryer through the sub-program.

[0119] When the pressure relief operation is performed on the dryer through the sub-program, the dryer pressure condition judgment logic is started to prevent the pressure condition from being unable to be met for a long time due to equipment failures such as valve blockage, which causes the program to stagnate and prolong the regeneration cycle; the pressure and time are used for simultaneous judgment. If the pressure condition is met within the specified time, the timing is stopped and the next step is entered; if the pressure condition is still not met within the specified time, the alarm is triggered to prompt the operator to conduct on-site investigation and disposal. After returning to normal and the pressure condition is met, the next step is entered. The parallel branch mode is adopted here. If and only if both branches meet the conditions and are executed, the program is considered completed and the next step can be performed. Branch 1 reads the current pressure value as the offline value and compares it with the given pressure value until the condition judgment relationship is met; Branch 2 simultaneously starts the timer module trigger logic in parallel. If the parallel branch dryer pressure judgment condition is still not met after the timer has completed a certain period of time, the text prompts the operator of abnormal working conditions. After the operator investigates and solves the problem, the dryer pressure condition judgment logic is started again until the condition judgment relationship is met. That is, branch one is used to control the dryer after pressure relief to meet the pressure relief completion requirement, and branch two is used to perform a prompt operation when the dryer after pressure relief does not meet the pressure relief completion requirement.

[0120] Specifically, when performing the pressure relief operation, the minimum number of discharge times for discharging the material in the dryer to the downstream fuel gas pipeline network is determined; wherein, the volume flux of the downstream equipment that fluctuates once at the maximum within an acceptable range is first calculated; then the volume of the material in the dryer converted to the downstream pressure is calculated; and then the quotient of the volume of the material in the dryer converted to the downstream pressure and the volume flux of the downstream equipment that fluctuates once at the maximum within the acceptable range is determined to be the minimum number of discharge times for discharging the material in the dryer to the downstream fuel gas pipeline network.

[0121] For example, the volume flux of the downstream device that fluctuates once at the maximum within the tolerable range can be calculated according to the following first preset formula:

[0122]

[0123] Among them, F max is the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t smax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

[0124] The material in the dryer is converted to volume at downstream pressure using the following second preset formula:

[0125]

[0126] Among them, P 1 is the pressure of the dryer, P2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 The second preset formula is based on the ideal gas state equation P 1 V 1 =nRT=P 2 V 2 Derived from, where n is the amount of gas, R is the molar gas constant, and T is the temperature of the gas.

[0127] The actual number of discharges of the material in the dryer to the downstream fuel gas network is determined based on the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas network. Normally, after calculating the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas network, the actual number of discharges of the material in the dryer to the downstream fuel gas network is obtained by adding one more time to the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas network. This is because the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas network is a theoretical value. Due to process fluctuations, directly using the minimum number of discharges to relieve pressure may not be able to release all the flow that needs to be released to the downstream equipment. Therefore, in order to avoid such a situation, it is necessary to add one more time to the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas network.

[0128] The single discharge flow is determined according to the actual number of discharges of the material in the dryer to the downstream fuel gas network; specifically, in the pressure relief procedure, the total discharge flow is determined according to the specific pressure relief demand, and then the single discharge flow is determined. In actual operation, the total flow is usually divided by the minimum number of discharges to discharge the material in the dryer to the downstream fuel gas network, that is, the single discharge flow is obtained. Since the actual flow is one more than the minimum number of discharges to discharge the material in the dryer to the downstream fuel gas network, although there may be a surplus in the last time, the surplus flow will certainly not be too much. Therefore, the pressure relief valve can be directly opened completely during the last pressure relief.

[0129] The opening of the pressure relief valve is determined according to the single discharge flow rate; specifically, the single discharge flow rate is substituted into the following third preset formula to calculate the opening of the pressure relief valve:

[0130]

[0131] Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the control valve, x is the valve opening of the pressure relief valve, ε is the expansion coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

[0132] The opening time of the pressure relief valve is determined according to the opening of the pressure relief valve; before each valve opening, the pressure difference ΔP before and after the valve and the allowable discharge flow F are substituted into the formula to obtain the corresponding valve opening x. Since the valve on site is an electric valve and the valve parameters cannot be specified, the relationship between the test fitting valve parameters and the valve opening time t1 is x=et1-f, where e and f are fitting constants. Since e, f, and x in the formula have been obtained, e, f, and x can be substituted into x=et1-f to calculate the valve opening time t1. After the valve opening time t1 is calculated, the pressure relief valve is controlled to perform the valve opening operation according to the valve opening time t1 of the pressure relief valve. For example, the minimum number of discharges of the material in the dryer to the downstream fuel gas pipeline network is 3 times, and the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network is 4 times. Then, the valve opening time t1 is calculated according to the above method for the first 3 times, and the opening of the pressure relief valve is controlled by the valve opening time t1 for the first 3 valve openings. The third time directly controls the pressure relief valve to be fully opened.

[0133] When the pressure relief operation of the dryer is completed through the sub-program, a cold blowing operation is performed on the dryer through the sub-program, wherein the sub-program is used to automatically control the pressure relief valve to perform the pressure relief operation on the dryer and automatically control the cold and hot regeneration gas valves to perform the cold blowing operation on the dryer;

[0134] When the pressure relief operation of the dryer is completed through the sub-program, a cold blowing operation is performed on the dryer through the sub-program, including: when the pressure relief operation of the dryer is completed through the sub-program, the corresponding running stage of the main program is detected, and when it is detected that the main program runs to the cold blowing stage, the main program is controlled to be suspended; the cold blowing operation is performed on the dryer through the sub-program. Specifically, when the pressure relief operation of the dryer is completed through the sub-program, the main program will continue to be started, and because the main program is suspended before the pressure relief stage, the pressure relief program in the main program will continue to run as the main program continues to be started, but because the dryer has been depressurized, the pressure relief program in the main program is just running idle, and the dryer will not continue to be depressurized. When the pressure relief program in the main program is completed, it will be detected that the main program runs to the cold blowing stage, and then the main program will be controlled to be suspended, and then the cold blowing operation will be performed on the dryer through the sub-program.

[0135] In the main program design scheme, the schematic diagram of the regeneration gas flow control method is as follows Figure 3 As shown in the figure, the total flow and temperature of the mixed cold and hot regeneration gases can be expressed by the following formula:

[0136]

[0137] Q=q c +q h

[0138] Where, T is the temperature of the regenerated gas after mixing, °C; Q is the total flow rate of the regenerated gas after material mixing, t / h; q c is the cold regeneration gas flow rate, t / h; t c is the temperature of cold regeneration gas, °C; q h is the hot regeneration gas flow rate, t / h; t h is the temperature of hot regeneration gas, °C. It is not difficult to see from the total flow and temperature formula after the cold and hot regeneration gas are mixed that the temperature of the regeneration gas after mixing and the cold regeneration gas flow q c And the hot regeneration gas flow q h There is a direct relationship between the cold regeneration gas flow rate q c And the hot regeneration gas flow q h There is also a strong coupling relationship between them.

[0139] Therefore, the present application attempts to decouple the above coupling relationship, thereby obtaining clear cold regeneration gas valve opening and hot regeneration gas valve opening, and optimizing the regeneration gas flow control method. Figure 4 The schematic diagram of the optimized regeneration gas flow control method is shown in FIG. 1 , and the specific decoupling operation is as follows:

[0140] Determine the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after material mixing;

[0141] Determine the output calculated by the mixed regeneration gas temperature controller according to the target temperature of the mixed regeneration gas, and determine the output calculated by the mixed regeneration gas total flow controller according to the target total flow of the mixed regeneration gas;

[0142] Substitute the output calculated by the mixed regeneration gas temperature controller into the following fourth preset formula:

[0143]

[0144] Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ c is the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h The real-time opening of the hot regeneration gas valve;

[0145] Substitute the output calculated by the mixed regeneration gas total flow controller into the following fifth preset formula:

[0146]

[0147] Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas;

[0148] The opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve are solved according to the set of equations formed by the fourth preset formula and the fifth preset formula; the cold regeneration gas valve and the hot regeneration gas valve are controlled respectively according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve.

[0149] The output calculated by the mixed regeneration gas temperature controller is determined according to the target temperature of the mixed regeneration gas, and the output calculated by the mixed regeneration gas total flow controller is determined according to the target total flow of the mixed regeneration gas, including:

[0150]

[0151]

[0152] T is the temperature of the regenerated gas after mixing, °C; Q is the total flow rate of the regenerated gas after material mixing, t / h; q c is the cold regeneration gas flow rate, t / h; t c is the temperature of cold regeneration gas, °C; q h is the hot regeneration gas flow rate, t / h; t h is the temperature of hot regeneration gas, °C; T ′ Output calculated by the mixed regeneration gas temperature controller, %; F ′ The output calculated by the total flow controller of the mixed regeneration gas, %; q cmax The corresponding flow rate when the cold regeneration gas valve is fully opened, t / h; q hmax The flow rate corresponding to the hot regeneration gas valve being fully opened, t / h.

[0153] Solving the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve according to the set of equations formed by the fourth preset formula and the fifth preset formula includes:

[0154] The fourth preset formula and the fifth preset formula are transformed to obtain the following set of equations:

[0155]

[0156]

[0157] Among them, V h is the opening of the hot regeneration gas valve, and V c is the opening of the cold regeneration gas valve.

[0158] Since γ, F in this system of equations ′ and T ′ They are all known quantities. Therefore, the temperature, flow rate, and cold and hot regeneration gases can be decoupled, and the opening of the cold and hot regeneration gas valves can be directly obtained, achieving a more precise control effect.

[0159] When the cold blowing operation of the dryer is completed through the sub-program, the main program is controlled to continue running to realize the switching operation of the dryer.

[0160] The beneficial effect of the present application is that when the main program runs to the pressure relief stage, the main program can be controlled to pause, and the pressure relief and cold blowing operations are performed through the sub-program. Since the sub-program can automatically control the pressure relief valve to perform pressure relief operations on the dryer and automatically control the hot and cold regeneration gas valves to perform cold blowing operations on the dryer, the pressure relief and cold blowing operations are performed by the sub-program instead of the main program, thereby realizing automatic control of the pressure relief and cold blowing operations. Moreover, while optimizing the pressure relief and cold blowing operations, there is no need to modify the main program, thereby reducing the difficulty of program optimization.

[0161] In one embodiment, the above step S103 may be implemented as the following steps A1-A6:

[0162] In step A1, the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network is determined;

[0163] In step A2, the actual number of times the material in the dryer is discharged to the downstream fuel gas pipeline network is determined according to the minimum number of times the material in the dryer is discharged to the downstream fuel gas pipeline network;

[0164] In step A3, a single discharge flow rate is determined according to the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network;

[0165] In step A4, the opening of the pressure relief valve is determined according to the single discharge flow rate;

[0166] In step A5, the opening time of the pressure relief valve is determined according to the opening degree of the pressure relief valve;

[0167] In step A6, the pressure relief valve is controlled to perform a valve opening operation according to the valve opening time of the pressure relief valve.

[0168] In one embodiment, the above step A1 may be implemented as the following steps A11-A13:

[0169] In step A11, the volume flux of the downstream equipment that fluctuates once the maximum value within the tolerable range is calculated;

[0170] In step A12, the volume of the material in the dryer converted to the downstream pressure is calculated;

[0171] In step A13, the quotient of the volume converted into the material in the dryer under the downstream pressure and the volume flux of the downstream equipment that fluctuates once at the maximum within the tolerable range is determined as the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network.

[0172] In one embodiment, the above step A11 may be implemented as follows:

[0173] The volume flux of the downstream equipment with the maximum fluctuation within the tolerable range is calculated according to the following first preset formula:

[0174]

[0175] Among them, F max is the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t smax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

[0176] In one embodiment, the above step A11 may be implemented as follows:

[0177] The material in the dryer is converted to volume at downstream pressure using the following second preset formula:

[0178]

[0179] Among them, P 1 is the pressure of the dryer, P 2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 It is the volume that converts the material in the dryer into the downstream pressure.

[0180] In one embodiment, the above step A4 can be implemented as follows:

[0181] Substitute the single discharge flow into the following third preset formula to calculate the opening of the pressure relief valve:

[0182]

[0183] Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the control valve, x is the valve opening of the pressure relief valve, ε is the expansion coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

[0184] In one embodiment, the above step S104 may be implemented as the following steps B1-B6:

[0185] In step B1, the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after the materials are mixed are determined;

[0186] In step B2, the output calculated by the mixed regeneration gas temperature controller is determined according to the target temperature of the mixed regeneration gas, and the output calculated by the mixed regeneration gas total flow controller is determined according to the target total flow of the mixed regeneration gas;

[0187] In step B3, the output calculated by the mixed regeneration gas temperature controller is substituted into the following fourth preset formula:

[0188]

[0189] Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ c is the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h It is the real-time opening of the hot regeneration gas valve;

[0190] In step B4, the output calculated by the mixed regeneration gas total flow controller is substituted into the following fifth preset formula:

[0191]

[0192] Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas;

[0193] In step B5, the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve are solved according to the equation group consisting of the fourth preset formula and the fifth preset formula;

[0194] In step B6, the cold regeneration gas valve and the hot regeneration gas valve are controlled according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve, respectively.

[0195] Figure 5 is a block diagram of a dryer regeneration device, such as Figure 5 As shown, the dryer regeneration device includes the following modules:

[0196] The detection module 501 is used to detect the operation phase corresponding to the main program during the dryer switching regeneration process executed by the main program;

[0197] The first control module 502 is used to control the main program to stop running when it is detected that the main program runs to the pressure relief stage;

[0198] A pressure relief module 503, used for performing a pressure relief operation on the dryer through a sub-program;

[0199] A cold blowing module 504 is used to perform a cold blowing operation on the dryer through a sub-program when the pressure relief operation on the dryer is completed through the sub-program, wherein the sub-program is used to automatically control the pressure relief valve to perform the pressure relief operation on the dryer and automatically control the cold and hot regeneration gas valves to perform the cold blowing operation on the dryer;

[0200] The second control module 505 is used to control the main program to continue running when the cold blowing operation of the dryer is completed through the sub-program, so as to realize the switching operation of the dryer.

[0201] In one embodiment, the pressure relief module comprises:

[0202] The first determination submodule is used to determine the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network;

[0203] A second determination submodule is used to determine the actual number of discharges of the material in the dryer to the downstream fuel gas pipeline network according to the minimum number of discharges of the material in the dryer to the downstream fuel gas pipeline network;

[0204] The third determination submodule is used to determine a single discharge flow rate according to the actual discharge times of discharging the material in the dryer to the downstream fuel gas pipeline network;

[0205] A fourth determination submodule, used to determine the opening of the pressure relief valve according to a single discharge flow rate;

[0206] a fifth determination submodule, configured to determine an opening time of the pressure relief valve according to an opening degree of the pressure relief valve;

[0207] The first control submodule is used to control the pressure relief valve to perform a valve opening operation according to the valve opening time of the pressure relief valve.

[0208] In one embodiment, the first determining submodule is further configured to:

[0209] Calculate the volume flux of the downstream equipment with the largest fluctuation within the tolerable range;

[0210] Calculate the volume of material in the dryer converted to downstream pressure;

[0211] The quotient of the volume converted from the material in the dryer to the downstream pressure and the volume flux of the downstream equipment that fluctuates once at the maximum within the tolerable range is determined as the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network.

[0212] In one embodiment, the step of calculating the maximum volume flux of the downstream device that fluctuates once within an acceptable range includes:

[0213] The volume flux of the downstream equipment with the maximum fluctuation within the tolerable range is calculated according to the following first preset formula:

[0214]

[0215] Among them, F maxis the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t smax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

[0216] In one embodiment, the calculation converts the material in the dryer to a volume at a downstream pressure, including:

[0217] The material in the dryer is converted to volume at downstream pressure using the following second preset formula:

[0218]

[0219] Among them, P 1 is the pressure of the dryer, P 2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 It is the volume that converts the material in the dryer into the downstream pressure.

[0220] In one embodiment, the fourth determining submodule is further used to:

[0221] Substitute the single discharge flow into the following third preset formula to calculate the opening of the pressure relief valve:

[0222]

[0223] Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the control valve, x is the valve opening of the pressure relief valve, ε is the expansion coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

[0224] In one embodiment, the cold blowing module comprises:

[0225] The sixth determination submodule is used to determine the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after the materials are mixed;

[0226] A seventh determination submodule, for determining the output calculated by the mixed regeneration gas temperature controller according to the target temperature of the mixed regeneration gas, and determining the output calculated by the mixed regeneration gas total flow controller according to the target total flow of the mixed regeneration gas;

[0227] Substitute a submodule for substituting the output calculated by the mixed regeneration gas temperature controller into the following fourth preset formula:

[0228]

[0229] Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ cis the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h The real-time opening of the hot regeneration gas valve;

[0230] The submodule is also used to substitute the output calculated by the mixed regeneration gas total flow controller into the following fifth preset formula:

[0231]

[0232] Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas;

[0233] A solving submodule, used for solving the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve according to the equation group consisting of the fourth preset formula and the fifth preset formula;

[0234] The first control submodule is used to control the cold regeneration gas valve and the hot regeneration gas valve according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve respectively.

[0235] Figure 6 FIG. 1 is a schematic diagram of the hardware structure of a dryer regeneration system in one embodiment of the present application. Figure 6 As shown, the dryer regeneration system comprises:

[0236] at least one processor 620; and,

[0237] A memory 604 in communication with the at least one processor 620; wherein,

[0238] The memory 604 stores instructions that can be executed by the at least one processor 620, and the instructions are executed by the at least one processor 620 to implement the dryer regeneration method described in any of the above embodiments.

[0239] Reference Figure 6 , the dryer regeneration 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 .

[0240] The processing component 602 generally controls the overall operation of the dryer regeneration 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 the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0241] The memory 604 is configured to store various types of data to support the operation of the dryer regeneration system 600. Examples of such data include instructions for any application or method operating on the dryer regeneration system 600, such as text, pictures, 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.

[0242] The power supply assembly 606 provides power to the various components of the dryer regeneration system 600. The power supply 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 dryer regeneration system 600.

[0243] The multimedia component 608 includes a screen that provides an output interface between the dryer regeneration 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 may 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 may 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 dryer regeneration system 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0244] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC), and when the dryer regeneration system 600 is in an operation mode, such as an alarm mode, a recording mode, a voice recognition mode, and a voice output mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 604 or sent via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0245] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0246] The sensor assembly 614 includes one or more sensors for providing various aspects of status assessment for the dryer regeneration system 600. For example, the sensor assembly 614 may include a sound sensor. In addition, the sensor assembly 614 may detect the open / closed state of the dryer regeneration system 600, the relative positioning of the components, such as the display and keypad of the dryer regeneration system 600, and the sensor assembly 614 may also detect the operating state of the dryer regeneration system 600 or a component of the dryer regeneration system 600, such as the operating state of the air distribution plate, the structural state, the operating state of the discharge scraper, etc., the orientation or acceleration / deceleration of the dryer regeneration system 600 and the temperature change of the dryer regeneration system 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The 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, the sensor assembly 614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, a material stacking thickness sensor or a temperature sensor.

[0247] The communication component 616 is configured to enable the dryer regeneration system 600 to provide the ability to communicate with other devices and cloud platforms in a wired or wireless manner. The dryer regeneration 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.

[0248] In an exemplary embodiment, the dryer regeneration 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 dryer regeneration method described in any of the above embodiments.

[0249] 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 dryer regeneration system, the dryer regeneration system can implement the dryer regeneration method described in any of the above embodiments.

[0250] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may 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 may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0251] 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 generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. 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.

[0252] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate 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 A function specified in one or more boxes.

[0253] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0254] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for regenerating a dryer, characterized in that, it includes: During the execution of the main program for the dryer switching regeneration process, detecting the running stage corresponding to the main program; When it is detected that the main program runs to the pressure relief stage, controlling the main program to pause running; Performing a pressure relief operation on the dryer through a sub-program; When the pressure relief operation on the dryer through the sub-program is completed, performing a cold blow operation on the dryer through the sub-program, wherein the sub-program is used to automatically control the pressure relief valve to perform a pressure relief operation on the dryer and automatically control the hot and cold regeneration gas valves to perform a cold blow operation on the dryer; When the cold blow operation on the dryer through the sub-program is completed, controlling the main program to continue running to achieve the switching operation of the dryer.

2. The method according to claim 1, characterized in that, The performing a pressure relief operation on the dryer through the sub-program includes: Determining the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network; Determining the actual number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network according to the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network; Determining the single discharge flow rate according to the actual number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network; Determining the opening degree of the pressure relief valve according to the single discharge flow rate; Determining the valve opening time of the pressure relief valve according to the opening degree of the pressure relief valve; Controlling the pressure relief valve to perform a valve opening operation according to the valve opening time of the pressure relief valve.

3. The method according to claim 2, characterized in that, The determining the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network includes: Calculating the volume flux of the downstream equipment for the maximum fluctuation within the tolerable range once; Calculating the volume of the material in the dryer converted to the volume under the downstream pressure; Determining that the quotient of the volume of the material in the dryer converted to the volume under the downstream pressure and the volume flux of the downstream equipment for the maximum fluctuation within the tolerable range once is the minimum number of discharges for discharging the material in the dryer to the downstream fuel gas pipeline network.

4. The method according to claim 3, characterized in that, The calculating the volume flux of the downstream equipment for the maximum fluctuation within the tolerable range once includes: Calculating the volume flux of the downstream equipment for the maximum fluctuation within the tolerable range once according to the following first preset formula: Among them, F max is the maximum flow fluctuation acceptable to the downstream equipment according to the device test; a is a constant, b is a constant and (b<1); t smax It is the time it takes for the downstream equipment to stabilize again under the maximum flow fluctuation.

5. The method according to claim 3, characterized in that, The calculating the volume of the material in the dryer converted to the volume under the downstream pressure includes: Calculating the volume of the material in the dryer converted to the volume under the downstream pressure according to the following second preset formula: Among them, P 1 is the pressure of the dryer, P 2 is the pressure of the downstream fuel gas network, V 1 is the volume of the dryer, V 2 It is the volume that converts the material in the dryer into the downstream pressure.

6. The method according to claim 2, characterized in that, The determining the opening degree of the pressure relief valve according to the single discharge flow rate includes: Substituting the single discharge flow rate into the following third preset formula to calculate the opening degree of the pressure relief valve: Where F is the single discharge flow rate, μ is the flow coefficient, c is the valve position correction coefficient, R is the adjustable range coefficient of the regulating valve, x is the valve opening of the pressure relief valve, ε is the expansibility coefficient, α is the flow coefficient, ΔP is the pressure difference before and after the pressure relief valve, and ρ is the density.

7. The method according to claim 1, characterized in that, The performing a cold blow operation on the dryer through the sub-program includes: Determine the target temperature of the regenerated gas after mixing and the target total flow rate of the regenerated gas after material mixing; Determine the output calculated by the mixed regeneration gas temperature controller according to the target temperature of the mixed regeneration gas, and determine the output calculated by the mixed regeneration gas total flow controller according to the target total flow of the mixed regeneration gas; Substitute the output calculated by the mixed regeneration gas temperature controller into the following fourth preset formula: Among them, T ′ is the output calculated by the mixed regeneration gas temperature controller, γ c is the unit flow coefficient of the cold regeneration valve, γ h is the unit flow coefficient of the hot regeneration valve, γ is the flow coefficient ratio of the hot regeneration valve and the cold regeneration valve, V c is the real-time opening of the cold regeneration gas valve, V h It is the real-time opening of the hot regeneration gas valve; Substitute the output calculated by the mixed regeneration gas total flow controller into the following fifth preset formula: Among them, F ′ Output calculated by the total flow controller for the mixed regeneration gas; Solving the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve according to the equation group consisting of the fourth preset formula and the fifth preset formula; The cold regeneration gas valve and the hot regeneration gas valve are controlled according to the opening of the cold regeneration gas valve and the opening of the hot regeneration gas valve respectively.

8. A dryer regeneration device, It is characterized in that include: A detection module is used to detect the corresponding operation stage of the main program during the dryer switching regeneration process executed by the main program; The first control module is used to control the main program to stop running when it is detected that the main program runs to the pressure relief stage; A pressure relief module, used for performing a pressure relief operation on the dryer through a sub-program; A cold blowing module, used for performing a cold blowing operation on the dryer through a sub-program when the pressure relief operation on the dryer is completed through a sub-program, wherein the sub-program is used for automatically controlling the pressure relief valve to perform a pressure relief operation on the dryer and automatically controlling the cold and hot regeneration gas valves to perform a cold blowing operation on the dryer; The second control module is used to control the main program to continue running when the cold blowing operation of the dryer is completed through the sub-program, so as to realize the switching operation of the dryer.

9. A dryer regeneration system, It is 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 dryer regeneration method according to any one of claims 1 to 7.

10. A computer-readable storage medium, It is characterized in that When the instructions in the storage medium are executed by a processor corresponding to the dryer regeneration system, the dryer regeneration system is enabled to implement the dryer regeneration method according to any one of claims 1 to 7.

Images