Rotation speed control method and system for rotational flow sand setting device

Abstract

The invention provides a rotational speed control method and system for a rotational flow grit chamber. The method comprises the following steps: collecting the water inlet flow, the water inlet suspended matter concentration, the water outlet flow and the water outlet suspended matter concentration of the rotational flow grit chamber in real time; according to the water inlet flow and the water inlet suspended matter concentration, the initial rotating speed of the cyclone sand setting device is calculated through a rotating speed formula; according to the outlet water flow, the outlet water suspended matter concentration and the preset outlet water standard required suspended matter concentration of the rotational flow grit chamber, calculating a rotating speed adjustment value of the rotational flow grit chamber by using an adjustment formula, and calculating by using the initial rotating speed and the rotating speed adjustment value to obtain a target rotating speed of the rotational flow grit chamber; according to the target rotating speed, the first running frequency of the rotational flow sand setting device is calculated through a first running formula, the rotational flow sand setting device is controlled to run based on the first running frequency, certain energy consumption waste is reduced, and the sand setting effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a rotation speed control method and system of a cyclone grit settling device. Background Art

[0002] In the design of sewage treatment projects, the grit chamber, as a key link in the pretreatment system, undertakes the important task of removing suspended matter from the incoming water. As a main form of grit chamber, the core equipment of the cyclone grit chamber is the cyclone grit chamber. However, in actual applications, the operation effect of the cyclone grit chamber in many sewage treatment plants is not ideal.

[0003] The main problem is that the rotation speed of the cyclone grit setter is difficult to adjust according to the real-time changes in the water volume. At present, most cyclone grit setters only operate at a fixed speed set at the beginning of operation, and cannot be flexibly adjusted according to the fluctuations in the water volume. This fixed speed operation mode makes it difficult for sewage to obtain an ideal flow velocity, thus affecting the grit settling efficiency. At the same time, due to the instability of the water volume, the operation of the cyclone grit settling device at a fixed speed not only reduces the grit settling effect, but also causes unnecessary energy waste. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a rotation speed control method and system for a cyclone sand settling device, which are used to solve the technical problems in the prior art.

[0005] On the one hand, the invention provides the following technical solution, a method for controlling the rotation speed of a cyclone sand settling device, the method comprising:

[0006] Collect the inlet flow rate, inlet suspended solids concentration, outlet flow rate and outlet suspended solids concentration of the cyclone grit chamber in real time;

[0007] According to the influent flow rate and the influent suspended solids concentration, the initial rotation speed of the cyclone grit settling device is calculated using a rotation speed formula;

[0008] Calculate the rotation speed adjustment value of the cyclone grit chamber using an adjustment formula according to the effluent flow rate, the effluent suspended solids concentration and the effluent standard required suspended solids concentration of the cyclone grit chamber preset;

[0009] The target speed of the cyclone grit trap is obtained by calculating the initial speed and the speed adjustment value;

[0010] According to the target rotation speed, a first operating frequency of the cyclone grit trap is calculated using a first operating formula, and the cyclone grit trap is controlled to operate based on the first operating frequency.

[0011] Compared with the prior art, the beneficial effects of the present application are as follows: by calculating the first operating frequency of the cyclone grit settling device using the first operating formula according to the target speed, and controlling the step of the cyclone grit settling device operating based on the first operating frequency, the operating frequency of the cyclone grit settling device can be adjusted cyclically, ensuring that the operating frequency of the cyclone grit settling device can be automatically adjusted in real time according to the water inlet volume and the concentration of suspended solids in the inlet water, and feedback correction adjustment is performed through the water outlet flow rate and the water outlet suspended solids concentration data at the water outlet end, ensuring that the speed of the cyclone grit settling device is in the optimal state. The effect of real-time adjustment of the water volume in the cyclone grit settling tank is achieved, thereby reducing certain energy consumption and improving the grit settling efficiency.

[0012] Furthermore, the method further comprises:

[0013] A sand discharge flow meter is installed on the water outlet pipe of the sand discharge pump in the cyclone sand settling tank, and the water outlet pipe flow of the sand discharge pump is collected in real time;

[0014] According to the outlet pipe flow, the accumulated sand volume in the cyclone sand settling tank is calculated using a sand volume formula;

[0015] According to the accumulated sand amount, a second operating formula is used to calculate a second operating frequency of the sand discharge pump, and the sand discharge pump is controlled to operate based on the second operating frequency.

[0016] Furthermore, the sand volume formula includes:

[0017] ΔQ=Q1×SS0-Q2×SS e -Q3×ρ×(1-w%)

[0018] Among them, ΔQ represents the accumulated sand in the cyclone grit chamber, Q1 represents the water inflow of the cyclone grit chamber, SS0 represents the suspended solids concentration in the cyclone grit chamber, Q2 represents the water outflow of the cyclone grit chamber, SS e It represents the concentration of suspended solids in the effluent of the cyclone sand settling tank, Q3 represents the flow rate of the sand discharge pump outlet pipe, ρ represents the density of sand and water, and w represents the water content of sand.

[0019] Furthermore, the second operation formula includes:

[0020] f2=(ΔQ÷(1-w%)+Q3)÷Q3×f1

[0021] Among them, f2 represents the second operating frequency of the sand discharge pump after adjustment, ΔQ represents the accumulated sand amount in the cyclone sand settling tank, w represents the water content of the sand, Q3 represents the flow rate of the sand discharge pump outlet pipe, and f1 represents the initial operating frequency of the sand discharge pump.

[0022] Furthermore, the speed formula includes:

[0023] n1=αQ1+βSS0

[0024] Wherein, n1 represents the initial rotation speed of the cyclone grit chamber, α represents the first flow adjustment coefficient, β represents the first suspended solids adjustment coefficient, SS0 represents the suspended solids concentration of the cyclone grit chamber inlet, and Q1 represents the cyclone grit chamber inlet volume.

[0025] Furthermore, the adjustment formula includes:

[0026]

[0027] Among them, Δn represents the speed adjustment value, represents the second flow adjustment coefficient, Q1 represents the water inlet of the cyclone grit chamber, Q2 represents the water outlet of the cyclone grit chamber, η represents the second suspended solids adjustment coefficient, SS e Indicates the suspended solids concentration in the effluent of the cyclone grit chamber, SS Np Indicates the suspended matter concentration required by the effluent standard of the cyclone grit chamber.

[0028] Furthermore, the first operating formula includes:

[0029] f=n×p÷60

[0030] Wherein, f represents the first operating frequency of the cyclone grit trap, n represents the target speed, and p represents the number of stages of the cyclone grit trap motor.

[0031] In a second aspect, the invention provides the following technical solution: a cyclone sand settling device rotation speed control system, the system comprising:

[0032] The collection module is used to collect the inlet flow rate, inlet suspended solids concentration, outlet flow rate and outlet suspended solids concentration of the cyclone grit chamber in real time;

[0033] A first calculation module is used to calculate the initial rotation speed of the cyclone grit setter according to the inlet flow rate and the inlet suspended matter concentration using a rotation speed formula;

[0034] A second calculation module is used to calculate the speed adjustment value of the cyclone grit chamber using an adjustment formula according to the effluent flow rate, the effluent suspended matter concentration and the effluent standard required suspended matter concentration preset in the cyclone grit chamber;

[0035] A third calculation module is used to calculate the target speed of the cyclone sand trap by using the preliminary speed and the speed adjustment value;

[0036] An operation module is used to calculate a first operation frequency of the cyclone grit trap according to the target rotation speed by using a first operation formula, and to operate the cyclone grit trap based on the first operation frequency.

[0037] In a third aspect, the invention provides the following technical solution: a computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for controlling the rotation speed of a cyclone sand settling device when executing the computer program.

[0038] In a fourth aspect, the invention provides the following technical solution: a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the rotation speed control method of a cyclone sand settling device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 A schematic diagram of the structure of a cyclone grit chamber of a cyclone grit chamber rotation speed control method provided by a first embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the overall framework of a method for controlling the rotation speed of a cyclone grit chamber provided in a first embodiment of the present invention;

[0042] Figure 3 A flow chart of a method for controlling the rotation speed of a cyclone grit chamber provided in accordance with a first embodiment of the present invention;

[0043] Figure 4 A structural block diagram of a cyclone grit chamber rotation speed control system provided in a second embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the hardware structure of a computer provided in the third embodiment of the present invention.

[0045] The embodiments of the present invention will be further described below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following information describes embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout are the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0047] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] Embodiment 1

[0050] In the first embodiment of the present invention, see Figure 1 and Figure 2 A method for controlling the rotation speed of a cyclone sand settling device, the overall framework of the method for controlling the rotation speed of a cyclone sand settling device comprises: a cyclone sand settling tank, one end of the cyclone sand settling tank is connected to an inlet pipeline, an inlet online flow meter is installed on the inlet pipeline, an inlet concentration meter, a cyclone sand settling device, an outlet concentration meter and a sand discharge pump are arranged near the cyclone sand settling tank, the sand discharge pump is connected to a sand-water separation device through a sand discharge pipeline, an outlet sand online flow meter is arranged on the sand discharge pipeline, the other end of the cyclone sand settling tank is connected to an outlet pipeline, and an outlet pipe is installed on the outlet pipe. The outlet water online flow meter, the inlet water concentration meter is arranged close to the inlet water pipeline, the outlet water concentration meter is arranged close to the outlet water pipeline, the inlet water online flow meter, the inlet water concentration meter, the cyclone sand settling device, the outlet water concentration meter, the sand discharge pump, the sand discharge online flow meter and the outlet water online flow meter are all electrically connected to the central control system, wherein the cyclone sand settling device and the sand discharge pump are electrically connected to the cyclone sand settling device control cabinet and the sand discharge pump control cabinet respectively, the cyclone sand settling device is electrically connected to the central control system through the cyclone sand settling device control cabinet, and the sand discharge pump is point-connected to the central control system through the sand discharge pump control cabinet.

[0051] See also Figure 3 , a method for controlling the rotation speed of a cyclone sand settling device, comprising the following steps S01 to S08:

[0052] S01, real-time collection of the inlet flow rate, inlet suspended solids concentration, outlet flow rate and outlet suspended solids concentration of the cyclone grit chamber;

[0053] In this embodiment, a water inlet flowmeter and a water inlet SS concentration meter are set at the water inlet end, a cyclone sand settling device is set in the cyclone sand settling tank, a water outlet flowmeter and a water outlet SS concentration meter are set at the water outlet end, and a sand discharge flowmeter is set on the sand discharge pump outlet pipe. Each device and instrument is provided with a signal line and a control line to connect with the control system. The cyclone sand settling device automatic control system adopts closed-loop automatic control technology, collects the inlet water volume Q1, the inlet suspended solids concentration SS0, and the cyclone sand settling device operation frequency data through the front-end data acquisition module and the calculation module, and collects the outlet water volume Q2, the outlet suspended solids concentration SS0 through the back-end data acquisition module and the calculation module. e Data and input calculation parameters determined by actual experiments.

[0054] S02, calculating the initial rotation speed of the cyclone grit chamber using a rotation speed formula according to the influent flow rate and the influent suspended solids concentration;

[0055] The speed formula includes:

[0056] n1=αQ1+βSS0

[0057] Wherein, n1 represents the initial rotation speed of the cyclone grit chamber, α represents the first flow adjustment coefficient, β represents the first suspended solids adjustment coefficient, SS0 represents the suspended solids concentration of the cyclone grit chamber inlet, and Q1 represents the cyclone grit chamber inlet volume.

[0058] S03, calculating the speed adjustment value of the cyclone grit chamber by using an adjustment formula according to the effluent flow rate, the effluent suspended solids concentration and the effluent standard suspended solids concentration preset in the cyclone grit chamber;

[0059] The adjustment formula includes:

[0060]

[0061] Among them, Δn represents the speed adjustment value, represents the second flow adjustment coefficient, Q1 represents the water inlet of the cyclone grit chamber, Q2 represents the water outlet of the cyclone grit chamber, η represents the second suspended solids adjustment coefficient, SS e Indicates the suspended solids concentration in the effluent of the cyclone grit chamber, SS Np Indicates the suspended matter concentration required by the effluent standard of the cyclone grit chamber.

[0062] The first flow adjustment coefficient, the first suspended matter adjustment coefficient, the second flow adjustment coefficient and the second suspended matter adjustment coefficient are determined based on experiments.

[0063] S04, calculating and obtaining a target speed of the cyclone grit trap by using the preliminary speed and the speed adjustment value;

[0064] It can be understood that the target rotation speed of the cyclone grit trap is obtained by adding the preliminary rotation speed to the rotation speed adjustment value.

[0065] S05, calculating a first operating frequency of the cyclone grit trap using a first operating formula according to the target rotation speed, and controlling the cyclone grit trap to operate based on the first operating frequency.

[0066] The first operation formula includes:

[0067] f=n×p÷60

[0068] Wherein, f represents the first operating frequency of the cyclone grit trap, n represents the target speed, and p represents the number of stages of the cyclone grit trap motor.

[0069] It is worth noting that through steps S01-S05, the operating frequency of the cyclone grit settling device is cyclically adjusted to ensure that the operating frequency of the cyclone grit settling device can be automatically adjusted in real time according to the water inflow and the concentration of suspended solids in the inflow, and the feedback correction adjustment is made through the water flow rate and the concentration of suspended solids at the water outlet to ensure that the rotation speed of the cyclone grit settling device is in the best state. The effect of adjusting the water volume in the cyclone grit settling tank in real time is achieved, thereby reducing a certain amount of energy waste and improving the grit settling efficiency.

[0070] The method further comprises:

[0071] S06, installing a sand discharge flowmeter on the water outlet pipe of the sand discharge pump in the cyclone sand settling tank, and collecting the water outlet pipe flow of the sand discharge pump in real time;

[0072] In this embodiment, the sand pump automatic control system adopts closed-loop automatic control technology, collects water volume Q1, water suspended solids concentration SS0, and sand pump operation frequency data through the front-end data acquisition module and the calculation module, and collects water volume Q2, water suspended solids concentration SS0 through the back-end data acquisition module and the calculation module. e , the sand pump outlet pipe flow rate Q3 data, and input the density and water content data determined by actual experiments.

[0073] S07, calculating the accumulated sand amount in the cyclone sand settling tank according to the outlet pipe flow rate using a sand amount formula;

[0074] S08, calculating a second operating frequency of the sand discharge pump using a second operating formula according to the accumulated sand amount, and controlling the sand discharge pump to operate based on the second operating frequency.

[0075] Specifically, the sand volume formula includes:

[0076] ΔQ=Q1×SS0-Q2×SS e -Q3×ρ×(1-w%)

[0077] Among them, ΔQ represents the accumulated sand in the cyclone grit chamber, Q1 represents the water inflow of the cyclone grit chamber, SS0 represents the suspended solids concentration in the cyclone grit chamber, Q2 represents the water outflow of the cyclone grit chamber, SS e It represents the concentration of suspended solids in the effluent of the cyclone sand settling tank, Q3 represents the flow rate of the sand discharge pump outlet pipe, ρ represents the density of sand and water, and w represents the water content of sand.

[0078] Specifically, the second operating formula includes:

[0079] f2=(ΔQ÷(1-w%)+Q3)÷Q3×f1

[0080] Among them, f2 represents the second operating frequency of the sand discharge pump after adjustment, ΔQ represents the accumulated sand amount in the cyclone sand settling tank, w represents the water content of the sand, Q3 represents the flow rate of the sand discharge pump outlet pipe, and f1 represents the initial operating frequency of the sand discharge pump.

[0081] It is worth noting that through steps S06-S08, the operating frequency of the sand discharge pump is adjusted in a cycle to ensure that the sand in the cyclone sand settling tank is discharged in a timely and complete manner, and does not accumulate in the tank and enter the subsequent treatment unit with the water flow.

[0082] Through the coordination of steps S01-S05 and steps S06-S08, the cyclone grit settling device can timely adapt to the water volume of the water inlet, and timely feedback and adjust through the water outlet data to ensure that the cyclone grit settling tank is in the best operating state, ensure that the concentration of suspended matter entering the subsequent treatment unit meets the relevant requirements, and improve the operating stability and treatment effect of the subsequent treatment unit; it can also allow the sand and gravel deposited in the cyclone grit settling tank to be discharged from the tank body in a timely and complete manner to avoid accumulation and cause the sand and gravel to enter the subsequent units with the water flow.

[0083] In summary, a method for controlling the rotation speed of a cyclone grit setter is provided. The method calculates the first operating frequency of the cyclone grit setter using the first operating formula according to the target rotation speed, and controls the operation of the cyclone grit setter based on the first operating frequency, thereby realizing cyclic adjustment of the operating frequency of the cyclone grit setter, ensuring that the operating frequency of the cyclone grit setter can be automatically adjusted in real time according to the water inlet volume and the concentration of suspended solids in the inlet water, and feedback correction adjustment is performed through the water outlet flow rate and the suspended solids concentration data of the outlet water, ensuring that the rotation speed of the cyclone grit setter is in the optimal state. The effect of real-time adjustment of the water volume in the cyclone grit settling tank is realized, thereby reducing certain energy consumption and improving the grit settling efficiency.

[0084] Embodiment 2

[0085] like Figure 4 As shown, in a second embodiment of the present invention, a cyclone sand settling device rotation speed control system is provided, the system comprising:

[0086] A registration module 10 is used for a capability provider to register a capability on the capability platform and enter the capability components of the capability, wherein the capability components include basic information, deliverables, functions and performance;

[0087] The review module 20 is used for the capability operator to review the registered capability and its capability components, and publish the capability to the capability platform after the review is passed;

[0088] The calling module 30 is used for the capability demander to apply for subscription to the capability on the capability platform, and the capability platform generates a unique identifier for the capability; after the capability provider identifies the unique identifier, the capability demander is allowed to call the capability service through the capability gateway;

[0089] The monitoring module 40 is used for the capability operator to monitor the entire process of inputting, reviewing, publishing, subscribing and calling the capability and record relevant data.

[0090] The cyclone sand settling device rotation speed control system provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the system embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0091] Embodiment 3

[0092] like Figure 5 As shown, in the third embodiment of the present invention, the embodiment of the present invention provides the following technical solution, a computer, including a memory 202, a processor 201, and a computer program stored in the memory 202 and executable on the processor 201, and the processor 201 implements the rotation speed control method of the cyclone sand settling device as described above when executing the computer program.

[0093] Specifically, the processor 201 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0094] Among them, the memory 202 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 202 may include a hard disk drive (HDD), a floppy disk drive, a solid state drive (SSD), a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 202 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 202 may be inside or outside the data processing system. In a specific embodiment, the memory 202 is a non-volatile memory. In a specific embodiment, the memory 202 includes a read-only memory (ROM) and a random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (Programmable Read-Only Memory, PROM for short), an erasable PROM (Erasable Programmable Read-Only Memory, EPROM for short), an electrically erasable PROM (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), an electrically alterable ROM (Electrically Alterable Read-Only Memory, EAROM for short) or a flash memory (FLASH) or a combination of two or more of these. Under appropriate circumstances, the RAM can be a static random access memory (Static Random-Access Memory, abbreviated as SRAM) or a dynamic random access memory (Dynamic Random Access Memory, abbreviated as DRAM), wherein the DRAM can be a fast page mode dynamic random access memory (Fast Page Mode Dynamic Random Access Memory, abbreviated as FPMDRAM), an extended data output dynamic random access memory (Extended Date Out Dynamic Random Access Memory, abbreviated as EDODRAM), a synchronous dynamic random access memory (Synchronous Dynamic Random-Access Memory, abbreviated as SDRAM), etc.

[0095] The memory 202 may be used to store or cache various data files that need to be processed and / or used for communication, as well as possible computer program instructions executed by the processor 201 .

[0096] The processor 201 implements the above-mentioned cyclone grit chamber rotation speed control method by reading and executing the computer program instructions stored in the memory 202 .

[0097] In some embodiments, the computer may further include a communication interface 203 and a bus 200. Figure 5 As shown, the processor 201, the memory 202, and the communication interface 203 are connected via a bus 200 and communicate with each other.

[0098] The communication interface 203 is used to implement communication between the modules, systems, units and / or devices in the embodiment of the present application. The communication interface 203 can also implement data communication with other components such as: external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0099] The bus 200 includes hardware, software, or both, and couples the components of the computer to each other. The bus 200 includes, but is not limited to, at least one of the following: a data bus (DataBus), an address bus (AddressBus), a control bus (ControlBus), an expansion bus (ExpansionBus), and a local bus (LocalBus). By way of example and not limitation, the bus 200 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, or a 100,000 Pin Count bus. Bus, memory bus, Micro Channel Architecture (MCA) bus, Peripheral Component Interconnect (PCI) bus, PCI-Express (PCI-X) bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local Bus (VLB) bus or other suitable bus or a combination of two or more of these. Where appropriate, bus 200 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application considers any suitable bus or interconnect.

[0100] Embodiment 4

[0101] In the fourth embodiment of the present invention, in combination with the above-mentioned cyclone sand settling device rotation speed control method, the embodiment of the present invention provides the following technical solution, a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned cyclone sand settling device rotation speed control method is implemented.

[0102] Those skilled in the art will appreciate that the logic and / or steps described in the flowchart as data or otherwise herein, for example, can be considered as a sequenced data table of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by an instruction execution system, system or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, system or device and execute instructions), or in combination with these instruction execution systems, systems or devices. For the purposes of this specification, "computer-readable medium" can be any system that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, system or device, or in combination with these instruction execution systems, systems or devices.

[0103] More specific examples of computer-readable media (non-exhaustive list) include the following: electrical connections with one or more wires (electronic systems), portable computer disk cartridges (magnetic systems), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic systems, and portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0104] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0105] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and informative, but they cannot be construed as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for controlling the rotation speed of a cyclone sand trap, characterized in that: The method comprises: Collect the inlet flow rate, inlet suspended solids concentration, outlet flow rate and outlet suspended solids concentration of the cyclone grit chamber in real time; According to the influent flow rate and the influent suspended solids concentration, the initial rotation speed of the cyclone grit settling device is calculated using a rotation speed formula; Calculate the rotation speed adjustment value of the cyclone grit chamber using an adjustment formula according to the effluent flow rate, the effluent suspended solids concentration and the effluent standard required suspended solids concentration of the cyclone grit chamber preset; The target speed of the cyclone grit trap is obtained by calculating the initial speed and the speed adjustment value; According to the target rotation speed, a first operating frequency of the cyclone grit trap is calculated using a first operating formula, and the cyclone grit trap is controlled to operate based on the first operating frequency.

2. The method for controlling the rotation speed of a cyclone grit chamber according to claim 1, characterized in that: The method further comprises: A sand discharge flow meter is installed on the water outlet pipe of the sand discharge pump in the cyclone sand settling tank, and the water outlet pipe flow of the sand discharge pump is collected in real time; According to the outlet pipe flow, the accumulated sand volume in the cyclone sand settling tank is calculated using a sand volume formula; According to the accumulated sand amount, a second operating formula is used to calculate a second operating frequency of the sand discharge pump, and the sand discharge pump is controlled to operate based on the second operating frequency.

3. The method for controlling the rotation speed of a cyclone sand trap according to claim 2, characterized in that: The sand volume formula includes: ΔQ=Q1×SS0-Q2×SS e -Q3×ρ×(1-w%) Among them, ΔQ represents the accumulated sand in the cyclone grit chamber, Q1 represents the water inflow of the cyclone grit chamber, SS0 represents the suspended solids concentration in the cyclone grit chamber, Q2 represents the water outflow of the cyclone grit chamber, SS e It represents the concentration of suspended solids in the effluent of the cyclone sand settling tank, Q3 represents the flow rate of the sand discharge pump outlet pipe, ρ represents the density of sand and water, and w represents the water content of sand.

4. The method for controlling the rotation speed of a cyclone sand trap according to claim 2, characterized in that: The second operation formula includes: f2=(ΔQ÷(1-w%)+Q3)÷Q3×f1 Among them, f2 represents the second operating frequency of the sand discharge pump after adjustment, ΔQ represents the accumulated sand amount in the cyclone sand settling tank, w represents the water content of the sand, Q3 represents the flow rate of the sand discharge pump outlet pipe, and f1 represents the initial operating frequency of the sand discharge pump.

5. The method for controlling the rotation speed of a cyclone grit chamber according to claim 1, characterized in that: The speed formula includes: n1=αQ1+βSS0 Wherein, n1 represents the initial rotation speed of the cyclone grit chamber, α represents the first flow adjustment coefficient, β represents the first suspended solids adjustment coefficient, SS0 represents the suspended solids concentration of the cyclone grit chamber inlet, and Q1 represents the cyclone grit chamber inlet volume.

6. The method for controlling the rotation speed of a cyclone sand trap according to claim 1, characterized in that: The adjustment formula includes: Among them, Δn represents the speed adjustment value, represents the second flow adjustment coefficient, Q1 represents the water inlet of the cyclone grit chamber, Q2 represents the water outlet of the cyclone grit chamber, η represents the second suspended solids adjustment coefficient, SS e Indicates the suspended solids concentration in the effluent of the cyclone grit chamber, SS Np Indicates the suspended matter concentration required by the effluent standard of the cyclone grit chamber.

7. The method for controlling the rotation speed of a cyclone grit chamber according to claim 1, characterized in that: The first operation formula includes: f=n×p÷60 Wherein, f represents the first operating frequency of the cyclone grit trap, n represents the target speed, and p represents the number of stages of the cyclone grit trap motor.

8. A cyclone grit chamber rotation speed control system, characterized in that: The system comprises: The collection module is used to collect the inlet flow rate, inlet suspended solids concentration, outlet flow rate and outlet suspended solids concentration of the cyclone grit chamber in real time; A first calculation module is used to calculate the initial rotation speed of the cyclone grit setter according to the inlet flow rate and the inlet suspended matter concentration using a rotation speed formula; A second calculation module is used to calculate the speed adjustment value of the cyclone grit chamber using an adjustment formula according to the effluent flow rate, the effluent suspended matter concentration and the effluent standard required suspended matter concentration preset in the cyclone grit chamber; A third calculation module is used to calculate the target speed of the cyclone sand trap by using the preliminary speed and the speed adjustment value; An operation module is used to calculate a first operation frequency of the cyclone grit trap according to the target rotation speed by using a first operation formula, and to operate the cyclone grit trap based on the first operation frequency.

9. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for controlling the rotation speed of a cyclone sand trap according to any one of claims 1 to 7 is implemented.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the method for controlling the rotation speed of the cyclone sand settling device according to any one of claims 1 to 7 is implemented.

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