A pump front pressure control method, device, storage medium and processor

Abstract

The present invention discloses a method for controlling pump pressure, comprising obtaining a measured value of the pump pressure at the current moment; if the measured value of the pump pressure is greater than a first preset value, adjusting a regulating valve at the bottom of the regulating tank to a first valve position within a first preset time; after maintaining the value for a second preset time, adjusting the regulating valve to a second valve position within a third preset time; and if the measured value of the pump pressure is between the first preset value and the second preset value, stopping adjusting the regulating valve. The method, device, storage medium, and processor provided by the present invention can more timely and accurately adjust the valve position value of the regulating valve at the bottom of the slurry buffer tank, eliminate the pump pressure alarm, solve the problem of the system not being able to operate normally due to intermittent blockage of the slurry buffer tank bottom in the wastewater treatment system, and reduce the labor intensity of the operator.

Description

Technical Field

[0001] The present invention relates to an intelligent control method for a desulfurization wastewater treatment system in a catalytic device, and in particular to a pump front pressure control method, device, storage medium and processor. Background Art

[0002] In the petroleum catalytic cracking process, the wastewater treatment unit is a very important part that needs to be improved. Figure 1 In the wastewater treatment unit shown, after desulfurization waste slurry enters the wastewater treatment unit, it passes through a high-density settler 110, an expansion drum filter 120, and a slurry buffer tank 130. The slurry then enters a vacuum belt dewatering machine 160 from the bottom of the slurry buffer tank 130. The movement of the belt of dewatering machine 160 creates a seal between the water in the slurry and the vacuum chamber, achieving excellent dehydration. After filtration by the vacuum belt dewatering machine, the dewatering machine's vacuum pump extracts the waste liquid into the slurry buffer tank. The resulting mud cake, with a solids content of approximately 45% by weight, is barreled and transported by truck to an off-site treatment facility.

[0003] Because the desulfurization waste slurry contains mud, the bottom of the slurry buffer tank is easily blocked and the slurry cannot be sent to the dewatering machine. When the slurry continues to accumulate in the buffer tank, the dewatering machine vacuum pump will pump less waste liquid, and the vacuum pump inlet pressure will increase accordingly, eventually causing the system alarm and the wastewater treatment system to fail to operate normally.

[0004] However, in the prior art, in order to avoid the above situation, the operator needs to frequently monitor the inlet pressure of the vacuum pump, manually adjust the regulating valve 131 at the bottom of the slurry buffer tank 130, and perform intermittent control of the bottom of the slurry buffer tank 130, which is time-consuming and labor-intensive. The effect of the adjustment will also be affected by the operator's experience and status. Summary of the Invention

[0005] The purpose of the present invention is to provide a pump-front pressure control method, device, storage medium and processor. According to the characteristics of the vacuum belt dehydrator, combined with the expert knowledge and experience of on-site technicians and operators, the operator's operation is imitated to adjust the manual valve at the bottom of the residue oil buffer tank by controlling the inlet pressure of the dehydrator vacuum pump, so as to solve the problem of the system not being able to operate normally due to intermittent blockage at the bottom of the slurry buffer tank in the desulfurization wastewater treatment system, improve the timeliness and accuracy of the control of the regulating valve, and eliminate the pump-front pressure alarm.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a pump-front pressure control method, including: obtaining the measured value of the pump-front pressure at the current moment; if the measured value of the pump-front pressure is greater than a first preset value, then within the first preset time, adjusting the regulating valve at the bottom of the tank to a first valve position; after maintaining the second preset time, within the third preset time, adjusting the regulating valve to a second valve position; if the measured value of the pump-front pressure is between the first preset value and the second preset value, stopping adjusting the regulating valve.

[0007] Optionally, the method further includes: if the measured value of the pump front pressure is less than a second preset value, adjusting the regulating valve to a second valve position within a third preset time.

[0008] Optionally, it also includes: obtaining the measured value of the buffer tank liquid level at the current moment and the valve position of the regulating valve, as well as the mode of the hand operator, brush motor or dehydration motor, where the hand operator is a hand operator for controlling the regulating valve.

[0009] Optionally, it also includes: if the measured value of the buffer tank liquid level is less than a third preset value, or the hand operator or the brush motor or the dehydration motor fails, entering an abnormal mode, and the abnormal mode includes stopping adjusting the regulating valve.

[0010] Optionally, it also includes: obtaining empirical data; determining a first preset value, a second preset value, a third preset value, a first preset time, a second preset time, a third preset time, a first valve position, and a second valve position based on the empirical data.

[0011] Optionally, the method further includes: determining the regulating speed of the regulating valve at the bottom of the regulating tank to the first valve position, MV t+1 =MV t +K r , K r =(M MAX -MV t ) / T r , among which, MV t Indicates the valve position of the control valve at the current moment, MV t+1 Indicates the valve position of the regulating valve at the next moment, K r Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the first valve position, M MAX Indicates the first valve position, T r Indicates the first preset time.

[0012] Optionally, the method further includes determining a regulating speed, MV, for regulating the regulating valve to the second valve position. t+1 =MV t -K d , K d =(MV t -M MIN ) / T d , where Kd Indicates the rate at which the regulating valve at the bottom of the regulating tank moves to the second valve position, M MIN Indicates the second valve position.

[0013] On the other hand, the present application provides a pump-front pressure control device, including: an acquisition module: used to obtain the measured value of the pump-front pressure at the current moment; a valve opening module: used to adjust the regulating valve at the bottom of the tank to a first valve position within a first preset time if the measured value of the pump-front pressure is greater than a first preset value; a valve closing module: used to adjust the regulating valve to a second valve position within a third preset time after a second preset time; a stop module: used to stop adjusting the regulating valve if the measured value of the pump-front pressure is between the first preset value and the second preset value.

[0014] On the other hand, the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute any one of the pump-front pressure control methods described above in the present application.

[0015] On the other hand, the present application provides a processor for running a program, wherein the program, when run, is used to execute: a pump front pressure control method as described in any one of the above.

[0016] The present application provides a pump-front pressure control method, device, storage medium and processor, which can adjust the valve position value of the regulating valve at the bottom of the tank more timely and accurately, eliminate the pump-front pressure alarm, solve the problem of the system being unable to operate normally due to intermittent blockage of the bottom of the slurry buffer tank in the desulfurization wastewater treatment system, and reduce the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a wastewater treatment unit involved in the background technology of this application;

[0018] Figure 2 Application scenarios of wastewater treatment units in some embodiments of the present application;

[0019] Figure 3 This is a schematic structural diagram of the pump front pressure control device 210 of the present application;

[0020] Figure 4 This is a flow chart of a pump front pressure control method of the present application;

[0021] Figure 5 This is a flow chart of a pump front pressure control method of the present application;

[0022] Figure 6 This is a structural block diagram of a pump front pressure control device of the present application;

[0023] Figure 7This is the manual adjustment effect diagram of this application;

[0024] Figure 8 This is the adjustment effect diagram of the pump front pressure control device of this application. DETAILED DESCRIPTION

[0025] The following describes a pump-front pressure control method, device, storage medium, and processor according to this embodiment. In the following figures, the size relationships of the components may differ from actual dimensions. In the following figures, parts labeled with the same reference numerals are identical or equivalent parts, and this applies throughout this specification. Furthermore, the configurations of the components described throughout this specification are merely examples and are not intended to be limiting.

[0026] In order to solve the problem of the system not being able to operate normally due to intermittent blockage of the bottom of the slurry buffer tank in the desulfurization wastewater treatment system, and the problem of controlling the inlet pressure of the dehydrator vacuum pump, the present application proposes a pre-pump pressure control method. According to the characteristics and existing problems of the vacuum belt dehydrator 160, combined with the expert knowledge and experience of on-site technicians and operators, the method uses automatic control to replace the operator's operation to adjust the regulating valve 131 at the outlet of the buffer tank, thereby controlling the inlet pressure of the dehydrator vacuum pump within an acceptable operating range, solving the problem of the system not being able to operate normally due to intermittent blockage of the bottom of the slurry buffer tank and the continuous increase in the inlet pressure of the vacuum pump in the desulfurization wastewater treatment system, and making the operation of the wastewater treatment unit more continuous and stable.

[0027] Figure 2 The application scenarios of the wastewater treatment units of some embodiments of the present application are schematically shown. It should be noted that: Figure 2 What is shown are merely examples of scenarios in which the embodiments of the present application can be applied, to help technical users in this field understand the technical content of the present application, but it does not mean that the embodiments of the present application cannot be used in other devices, systems, environments or scenarios.

[0028] In this embodiment of the present application, the pre-pump pressure control device 210 monitors the dehydrator vacuum pump inlet pressure PI (Pressure Indicator) 170 to determine whether to adjust the regulating valve 131 at the outlet of the residual oil buffer tank 130 through the HIC (hand indication control) hand operator.

[0029] Figure 3 The schematic diagram of the structure of the pump pressure control device according to some embodiments of the present application is shown. The pump pressure control device 210 includes a knowledge base 410, an inference engine 420, a data center 440 and a data analysis 430. Figure 3As shown, the data stored in the knowledge base 410 includes expert knowledge and experience, and the specific data structure is shown in Table 1. The data center 440 stores the collected operation data, including the current pump front pressure measurement value and the liquid level LI (Level Indicator) 132 measurement value, and the specific data structure is shown in Table 2. The data in the knowledge base 410 and the data center 440 are analyzed to determine the adjustment direction and speed of the control valve 131. The analysis rules are shown in Table 3. Finally, the inference engine 420 is used to adjust the set value of the hand operator 450 according to the set rules, so as to drive the process object 460 through the hand operator 450. The above-mentioned process object 460 includes the control valve 131. The specific setting rules are shown in Table 4. The device in this article can be a server, PC, PAD, mobile phone, etc.

[0030] Table 1

[0031] <![CDATA[P MAX ]]> Upper limit setting value of pump inlet pressure <![CDATA[P MIN ]]> Lower limit setting value of pump inlet pressure <![CDATA[M MAX ]]> High limit setting value of the control valve <![CDATA[M MIN ]]> Low limit setting value of control valve <![CDATA[L MIN ]]> Low limit setting value of liquid level <![CDATA[T r ]]> Time from valve opening to target value <![CDATA[T d ]]> Time from valve closing to target value <![CDATA[T s ]]> Target valve position holding time

[0032] Table 2

[0033] <![CDATA[PV P ]]> The measured pressure before the pump at time t <![CDATA[MV t ]]> Adjust the valve position value at time t <![CDATA[PV L ]]> Liquid level measurement value at time t <![CDATA[MODE MV ]]> Handheld programmer mode <![CDATA[MODE SPRA ]]> Belt dehydration motor SPRA mode <![CDATA[MODE SPRB ]]> Brush roller motor SPRB mode

[0034] Table 3

[0035] <![CDATA[M MAX ≥MV t ]]> <![CDATA[K r =(M MAX -MV t ) / T r , K r is the valve opening rate]]> <![CDATA[M MIN ≤MV t ]]> <![CDATA[K d =(MV t -M MIN ) / T d , K d is the valve closing rate]]>

[0036] Table 4

[0037]

[0038] Compared with the existing control methods, the pump-front pressure control method, device, storage medium and processor proposed in this application can regulate the pump-front pressure more timely and accurately, eliminate the pump-front pressure alarm, solve the problem of intermittent blockage of the bottom of the slurry buffer tank in the desulfurization wastewater treatment system causing the system to be unable to operate normally, and reduce the labor intensity of operators.

[0039] Figure 4 This is a flow chart of a pump front pressure control method according to some embodiments of the present application, such as Figure 4 As shown, the above method includes the following steps S410-S440, wherein, in step S410, the measured value of the pressure before the pump at the current moment is obtained; in step S420, if the measured value of the pressure before the pump is greater than the first preset value, the regulating valve at the bottom of the tank is adjusted to the first valve position within the first preset time; in step S430, after maintaining the second preset time, the regulating valve is adjusted to the second valve position within the third preset time; in step S440, if the measured value of the pressure before the pump is between the first preset value and the second preset value, the adjustment of the regulating valve is stopped.

[0040] In this embodiment of the present application, when the measured value of the pre-pump pressure is greater than the first preset value, steps 420 and 430 are an adjustment process, and the regulating valve finally stops at the second valve position after each adjustment is completed. In order to make the measured value of the pre-pump pressure between the first preset value and the second preset value, multiple adjustments can be performed. When the adjustment of the regulating valve is stopped, the regulating valve finally stops at the second valve position.

[0041] The present application provides a pump-front pressure control method, which detects the inlet pressure of the dehydrator vacuum pump to determine whether and how to adjust the manual valve at the outlet of the residue oil buffer tank, thereby eliminating the pump-front pressure alarm, solving the problem of the system not being able to operate normally due to intermittent blockage of the bottom of the slurry buffer tank in the desulfurization wastewater treatment system, and reducing the impact of the adjustment process on the system fluctuations.

[0042] Figure 5 This is a flow chart of a pump front pressure control method according to some embodiments of the present application, such as Figure 5 As shown, the above method includes the following steps S510-S560, in step 510, obtaining empirical data; in step 511, determining a first preset value, a second preset value, a third preset value, a first preset time, a second preset time, a third preset time, a first valve position and a second valve position based on the empirical data, wherein, in step 511, the first preset value is the upper limit setting value of the pressure before the pump, the second preset value is the lower limit setting value of the pressure before the pump, the third preset value is the lower limit setting value of the liquid level, the first preset time is the time for opening the valve to the target value, the second preset time is the holding time of the target valve position, the third preset time is the time for closing the valve to the target value, the first valve position is the upper limit setting value of the regulating valve, and the second valve position is the lower limit setting value of the regulating valve.

[0043] In step 520, the measured value of the pump front pressure, the measured value of the buffer tank liquid level and the valve position of the regulating valve at the current moment, as well as the mode of the hand operator, the brush motor SPRB or the dehydration motor SPRA are obtained. The hand operator is a hand operator that controls the regulating valve. In step 530, it is determined whether it is true if the measured value of the buffer tank liquid level is less than the third preset value, or if the brush motor SPRB or the dehydration motor SPRA fails. If so, step 530 is executed to enter the abnormal mode. The abnormal mode includes stopping adjusting the regulating valve. If not, step 540, 550 or 560 is entered. In step 540, if the measured value of the pump front pressure PI is greater than the first preset value, then in the first Within the preset time, adjust the regulating valve at the bottom of the tank to the first valve position; in step 541, after maintaining the second preset time, adjust the regulating valve to the second valve position within the third preset time; in step 550, if the measured value of the pump-in-line pressure PI is less than the second preset value, adjust the regulating valve to the second valve position within the third preset time; in step 560, if the measured value of the pump-in-line pressure PI is between the first preset value and the second preset value, stop adjusting the regulating valve; after step S541, determine whether the measured value of the pump-in-line pressure PIR is still greater than the first preset value, if so, execute S540 and S541 again, if not, execute step S550 or step S560.

[0044] In this embodiment of the present application, the length of the third preset time is greater than or equal to the length of time required for the pressure to return to normal.

[0045] According to some embodiments of the present application, a method for controlling the pressure before a pump further includes determining an adjustment speed of a regulating valve at the bottom of the regulating tank to a first valve position, MV t+1 =MV t +K r , K r =(M MAX -MV t ) / T r ; Among them, MV t Indicates the valve position of the regulating valve at the current moment, i.e., time t, MV t+1 Indicates the valve position of the regulating valve at the next moment, i.e., time t+1, K r Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the first valve position, M MAX Indicates the first valve position, T r Indicates the first preset time.

[0046] According to some embodiments of the present application, a pump front pressure control method further includes determining a regulating speed, MV, of regulating the regulating valve to a second valve position. t+1 =MV t -K d , K d=(MV t -M MIN ) / T d , where K d Indicates the rate at which the regulating valve at the bottom of the regulating tank moves to the second valve position, M MIN Indicates the second valve position.

[0047] Figure 6 The following schematically shows a structural block diagram of a pump front pressure control device according to an embodiment of the present application, as shown in FIG. Figure 6 As shown, the above-mentioned control device includes an acquisition module 610, a valve opening module 620, a valve closing module 630 and a stop module 640, wherein the acquisition module 610 is used to obtain the measured value of the pump-front pressure at the current moment; the valve opening module 620 is used to adjust the regulating valve at the bottom of the tank to the first valve position within the first preset time if the measured value of the pump-front pressure PI is greater than the first preset value; the valve closing module 630 is used to adjust the regulating valve to the second valve position within the third preset time after maintaining the second preset time; the stop module 640 is used to stop adjusting the regulating valve if the measured value of the pump-front pressure is between the first preset value and the second preset value.

[0048] According to a pump pre-pressure control device of some embodiments of the present application, the valve closing module 630 is further used to adjust the regulating valve to a second valve position within a first preset time if the measured value of the pump pre-pressure PI is less than a second preset value.

[0049] According to a pre-pump pressure control device of some embodiments of the present application, the acquisition module 610 is also used to obtain the measured value of the buffer tank liquid level and the valve position of the regulating valve at the current moment, as well as the mode of the hand operator, the brush motor SPRB or the dehydration motor SPRA, where the hand operator is a hand operator for controlling the regulating valve.

[0050] According to some embodiments of the present application, a pre-pump pressure control device further includes an abnormal module 650, which is used to enter an abnormal mode if the measured value of the buffer tank liquid level is less than a third preset value, or a fault occurs in the hand operator or the brush motor SPRB or the dehydration motor SPRA. The abnormal mode includes stopping the adjustment of the regulating valve.

[0051] According to a pre-pump pressure control device of some embodiments of the present application, the acquisition module 610 is further configured to acquire empirical data.

[0052] According to some embodiments of the present application, a pump pressure control device further includes a preset module 660 configured to determine a first preset value, a second preset value, a third preset value, a first preset time, a second preset time, a third preset time, a first valve position, and a second valve position based on empirical data. The empirical data includes an upper limit set value for the pump pressure, a lower limit set value for the pump pressure, a high limit set value for the regulating valve, a low limit set value for the regulating valve, a low limit set value for the liquid level, a time from valve opening to a target value, a time from valve closing to a target value, and a time to hold the target valve position.

[0053] According to a pump front pressure control device of some embodiments of the present application, the valve opening module 620 is further used to determine the regulating speed of the regulating valve at the bottom of the regulating tank to the first valve position, MV t+1 =MV t +K r , K r =(M MAX -MV t ) / T r , among which, MV t Indicates the valve position of the control valve at the current moment, MV t+1 Indicates the valve position of the regulating valve at the next moment, K r Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the first valve position, M MAX Indicates the first valve position, T r Indicates the first preset time.

[0054] According to a pump front pressure control device of some embodiments of the present application, the valve closing module 630 is further used to determine the adjustment speed of adjusting the regulating valve to the second valve position, MV t+1 =MV t -K d , K d =(MV t -M MIN ) / T d , where K d Indicates the rate at which the regulating valve at the bottom of the regulating tank moves to the second valve position, M MIN Indicates the second valve position.

[0055] The pump front pressure control device includes a processor and a memory. The acquisition module 610, valve opening module 620, valve closing module 630 and stop module 640 are all stored in the memory as program units, and the processor executes the above program units stored in the memory to realize the corresponding functions.

[0056] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the dehydrator vacuum pump inlet pressure can be controlled within the operating range by adjusting the kernel parameters.

[0057] According to the module of the embodiment of the present application, submodule, unit, subunit, any multiple or any multiple at least part of the function can be realized in one module. According to the module of the embodiment of the present application, submodule, unit, subunit, any one or more can be split into multiple modules to realize. According to the module of the embodiment of the present application, submodule, unit, subunit, any one or more can be at least partially realized as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be realized by hardware or firmware of any other reasonable way of integrating or encapsulating the circuit, or in any one of the three implementation modes of software, hardware and firmware or in any appropriate combination of any of them. Or, according to the module of the embodiment of the present application, submodule, unit, subunit, one or more can be at least partially realized as a computer program module, which can perform corresponding functions when the computer program module is run. For example, any one of the acquisition module 610, the valve opening module 620, the valve closing module 630 and the stop module 640 can be combined in one module to realize, or any one of the modules can be split into multiple modules. Alternatively, at least part of the functionality of one or more of these modules may be combined with at least part of the functionality of other modules and implemented in one module.

[0058] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0059] An embodiment of the present invention provides a storage medium storing a program, which implements the pump front pressure control method when executed by a processor.

[0060] An embodiment of the present invention provides a processor, which is used to run a program, wherein the pump front pressure control method is executed when the program is run.

[0061] Specifically, the processor may include, for example, a general-purpose microprocessor, an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor may also include onboard memory for caching purposes. The processor may be a single processing unit or multiple processing units for executing different actions of the method flow according to the embodiments of the present application.

[0062] The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program that initializes the following method steps: Step 710, obtaining a current measured value of the pump inlet pressure; Step 720, determining a range of values ​​within which the measured value of the pump inlet pressure falls; Step 730, if the measured value of the pump inlet pressure is greater than a first preset value, adjusting a regulating valve at the bottom of the tank to a first valve position within a first preset time; Step 740, after a second preset time, adjusting the regulating valve to a second valve position within a third preset time; Step 750, if the measured value of the pump inlet pressure PI is between the first preset value and the second preset value, stopping adjusting the regulating valve; Step 760, if the measured value of the pump inlet pressure PI is less than the second preset value, adjusting the regulating valve to the second valve position within the first preset time; Step 711, obtaining a current measured value of the buffer tank liquid level and the valve position of the regulating valve, as well as the mode of a hand operator, a brush motor SPRB, or a dehydration motor SPRA, wherein the hand operator is a hand operator for controlling the regulating valve. Step 770: If the measured value of the buffer tank liquid level is less than the third preset value, or the handheld operator or the brush motor SPRB or the dehydration motor SPRA fails, enter the abnormal mode, which includes stopping the adjustment of the regulating valve. Step 701: Acquire empirical data; Step 702: Determine the first preset value, the second preset value, the third preset value, the first preset time, the second preset time, the third preset time, the first valve position and the second valve position based on the empirical data. Step 780 includes determining the adjustment speed of the regulating valve at the bottom of the regulating tank to the first valve position, MV t+1 =MV t +K r , K r =(M MAX -MV t ) / T r , among which, MV t Indicates the valve position of the control valve at the current moment, MV t+1 Indicates the valve position of the regulating valve at the next moment, K r Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the first valve position, M MAX Indicates the first valve position, T r Step 790 includes determining the adjustment speed of adjusting the regulating valve to the second valve position, MV t+1 =MV t -K d , where K d =(MV t -M MIN ) / T d , where K d Indicates the rate at which the regulating valve at the bottom of the regulating tank moves to the second valve position, M MIN Indicates the second valve position.

[0063] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, devices, 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, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0064] According to a wastewater treatment unit of a catalytic cracking unit of an oil refinery in which a method for controlling the pre-pump pressure is used as an example of the present application, the slurry buffer tank needs to continuously drop slurry into the vacuum belt dehydrator for dehydration. Before the improvement, the vacuum pump inlet pressure needs to be continuously monitored manually, and manual operation is performed when the pre-pump pressure reaches the value to be opened. The operation is very labor-intensive. According to the technical parameters provided by the expert knowledge and experience, the valve opening pressure value is set to 100kPa, the valve closing pressure value is set to 30kPa, the valve opening target position is 45, the valve closing target position is 25, the valve opening time is 2s, the valve closing time is 5s, and the valve position holding time is 20s. The control effects before and after implementation are compared. Figure 7 、 8 shown.

[0065] Depend on Figure 7 、 8 It can be seen that without the expert control system, it is impossible for humans to constantly monitor the pressure in front of the pump, causing it to remain high for extended periods. However, the expert control system effectively avoids this situation by controlling the handheld operator to lower the pressure the moment the pressure exceeds the upper limit, solving a problem that has long plagued the catalytic cracking unit and ensuring more continuous and stable operation of the wastewater treatment unit.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0070] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0071] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0072] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of the boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0073] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0074] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0075] Some block diagrams and / or flow charts are shown in the accompanying drawings. It should be understood that some blocks in the block diagrams and / or flow charts or their combinations 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, or other programmable data processing device, so that when these instructions are executed by the processor, a device for implementing the functions / operations described in these block diagrams and / or flow charts can be created. The technology of the present application can be implemented in the form of hardware and / or software (including firmware, microcode, etc.). In addition, the technology of the present application can take the form of a computer program product on a computer-readable storage medium having instructions stored thereon, which can be used by an instruction execution system or in combination with an instruction execution system.

Claims

1. A vacuum pump front pressure control method is applied to wastewater treatment, characterized in that: include: Get the measured value of the pressure before the vacuum pump at the current moment; If the measured value of the pressure before the vacuum pump is greater than a first preset value, the regulating valve at the bottom of the regulating tank is adjusted to a first valve position within a first preset time; After maintaining the second preset time, within a third preset time, adjusting the regulating valve to the second valve position; If the measured value of the pressure before the vacuum pump is between the first preset value and the second preset value, stop adjusting the regulating valve; Obtaining the current measured value of the buffer tank liquid level and the valve position of the regulating valve, as well as the mode of the hand operator, brush roller motor or dehydration motor, where the hand operator is a hand operator for controlling the regulating valve; If the measured value of the buffer tank liquid level is less than a third preset value, or the hand operator, the brush roller motor, or the dehydration motor fails, the abnormal mode is entered, and the abnormal mode includes stopping adjusting the regulating valve; Acquire empirical data; Determine a first preset value, a second preset value, a third preset value, a first preset time, a second preset time, a third preset time, a first valve position, and a second valve position according to empirical data; Determine the adjustment speed of the regulating valve at the bottom of the regulating tank to the first valve position, , ,in, Indicates the valve position of the regulating valve at the current moment. Indicates the valve position of the regulating valve at the next moment. Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the first valve position. Indicates the first valve position, Indicates the first preset time; determining a regulating speed for regulating the regulating valve to a second valve position, , ,in, Indicates the rate at which the regulating valve at the bottom of the regulating tank reaches the second valve position. Indicates the second valve position.

2. The vacuum pump front pressure control method according to claim 1 is applied to wastewater treatment, characterized in that: Also includes: If the measured value of the pressure upstream of the vacuum pump is less than the second preset value, the regulating valve is adjusted to the second valve position within a third preset time.

3. A vacuum pump pressure control device for implementing a vacuum pump front pressure control method as claimed in claim 1, characterized in that: include: Acquisition module: used to obtain the measured value of the pressure before the vacuum pump at the current moment; Valve opening module: used for adjusting the regulating valve at the bottom of the tank to a first valve position within a first preset time if the measured value of the pressure before the vacuum pump is greater than a first preset value; Valve closing module: used for adjusting the regulating valve to the second valve position within a third preset time after the second preset time; A stop module is configured to stop regulating the regulating valve if the measured value of the pressure in front of the vacuum pump is between the first preset value and the second preset value.

4. A machine-readable storage medium having instructions stored thereon, wherein the instructions are used to enable a machine to execute the vacuum pump front pressure control method described in any one of claims 1-2 of the present application.

5. A processor, characterized in that: Used to run a program, wherein the program, when run, is used to execute: the vacuum pump front pressure control method according to any one of claims 1-2.

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