CN116560306A - Pneumatic conveying device real-time flow monitoring control system and method based on DCS - Google Patents
Pneumatic conveying device real-time flow monitoring control system and method based on DCS Download PDFInfo
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- CN116560306A CN116560306A CN202211627576.1A CN202211627576A CN116560306A CN 116560306 A CN116560306 A CN 116560306A CN 202211627576 A CN202211627576 A CN 202211627576A CN 116560306 A CN116560306 A CN 116560306A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013589 supplement Substances 0.000 claims abstract description 4
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 6
- 238000012840 feeding operation Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 238000005660 chlorination reaction Methods 0.000 description 5
- 239000002006 petroleum coke Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 239000006052 feed supplement Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/02—Halides of titanium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/33—Director till display
- G05B2219/33273—DCS distributed, decentralised controlsystem, multiprocessor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses a real-time flow monitoring control system and method of a pneumatic conveying device based on DCS, wherein the method comprises the following steps of S1, measuring and obtaining an hour feeding quantity V of a conveying tank, and determining a flow control instruction Y of the conveying tank; s2, taking the hour feeding quantity V as a real-time value of a flow control PID, taking a flow control instruction Y as a set value of the flow control PID, and adjusting the feeding speed in real time by changing the set value; s3, setting a weight low limit value A of the conveying tank, taking the low limit value A as a manual and automatic control switching condition of a control system corresponding to the flow control PID, and sending a prompt after the manual and automatic switching condition is reached; s4, fixing the conveying speed of the conveying tank; s5, pressurizing the buffer tank at the upper part of the conveying tank until the pressure of the buffer tank is greater than that of the conveying tank; s6, opening a balance valve between the conveying tank and the buffer tank, and then opening a feed supplementing valve of the conveying tank to supplement the conveying tank; s7, stopping feeding when the weight of the conveying tank reaches a set high limit value B, and closing a feeding valve and a buffer valve; and S8.100s later, the control is changed into automatic control.
Description
Technical Field
The invention belongs to the technical field of flow control of pneumatic conveying devices, and particularly relates to a real-time flow monitoring control system and method of a pneumatic conveying device based on DCS.
Background
The pneumatic conveying device is one of key equipment in the titanium dioxide production process by the chlorination process, and continuously conveys high titanium slag and petroleum coke into the chlorination furnace by the pneumatic conveying device, so that the continuous reaction of the chlorination furnace can be ensured. The control of the flow of the high titanium slag and the petroleum coke in the pneumatic conveying process is a key for guaranteeing the condition of the chlorination furnace.
In the prior art, the frequency of a feeding motor or the output of a regulating valve is controlled in a sectional manner by taking the weight change quantity in unit time as input, and the method has the defects of low response speed and large fluctuation of the feeding quantity when the feeding quantity is changed, and can not accurately realize the metering function. Especially during the feed tank replenishment, weight increases seriously affect the calculation of feed rate, some require stopping the feed, some feed inaccuracies, and the feed amount during this time period cannot be measured.
Aiming at the problems, a real-time flow monitoring control system and method of a pneumatic conveying device based on DCS are provided.
Disclosure of Invention
In order to solve the problems, the invention provides a DCS-based real-time flow monitoring control system and method for a pneumatic conveying device, which aim at the problems of flow monitoring and control of the pneumatic conveying device.
The embodiment of the invention is realized by the following technical scheme:
a real-time flow monitoring control method of a pneumatic conveying device based on DCS comprises the following steps:
s1, measuring and obtaining an hour feeding quantity V of a conveying tank, and determining a flow control instruction Y of the conveying tank;
s2, taking the hour feeding quantity V as a real-time value of a flow control PID, taking a flow control instruction Y as a set value of the flow control PID, and adjusting the feeding speed in real time by changing the set value;
s3, setting a weight low limit value A of the conveying tank, taking the low limit value A as a manual and automatic control switching condition of a control system corresponding to the flow control PID, and sending a prompt after the manual and automatic switching condition is reached;
s4, fixing the conveying speed of the conveying tank;
s5, pressurizing the buffer tank at the upper part of the conveying tank until the pressure of the buffer tank is greater than that of the conveying tank;
s6, opening a balance valve between the conveying tank and the buffer tank, and then opening a feed supplementing valve of the conveying tank to supplement the conveying tank;
s7, stopping feeding when the weight of the conveying tank reaches a set high limit value B, and closing a feeding valve and a buffer valve;
and S8.100s later, the control is changed into automatic control.
A DCS-based real-time flow monitoring and controlling system for pneumatic conveying apparatus, comprising:
the weight monitoring and parameter obtaining module is used for monitoring the weight change amount of the conveying tank and calculating the hour feeding amount;
the manual automatic switching module is used for setting the manual automatic switching condition of the control system corresponding to the flow control PID and sending a switching prompt after the manual automatic switching condition is reached;
the PID control module is used for taking the conveying tank flow control instruction Y as a set value of a flow control PID and taking the hour feeding quantity V as a measured value of a boiler air supply quantity control PID, and adopting a PID control algorithm in a DCS system for control
And the feeding control module is used for controlling the feeding device to perform feeding operation and fix the conveying speed when the weight of the conveying tank is lower than the lower limit value A.
In this embodiment, feed supplement device includes buffer tank and storage tank, the buffer tank is installed on delivery tank upper portion, and this buffer tank and delivery tank intercommunication, and the intercommunication department is provided with the relief valve, storage tank and buffer tank intercommunication, storage tank and buffer tank junction are provided with the feed supplement valve.
In this embodiment, pressure monitors are provided in both the buffer tank and the transfer tank for monitoring the internal pressures of the buffer tank and the transfer tank.
In this embodiment, the weight monitoring and parameter obtaining module includes a load cell mounted at the bottom of the conveying pipe.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
1. calculating and displaying real-time flow by counting weight change amounts in a plurality of unit time, and controlling the speed of a feeder of a conveying tank by flow PID to achieve the purpose of stable and accurate control; 2. the continuous and stable feeding of the conveying tank is controlled in a compensation mode, so that the continuous, stable and accurate control of the conveying device is realized 3. The feeding amount of the high titanium slag and the petroleum coke is accurately controlled, the proportion of the high titanium slag and the petroleum coke in the furnace is ensured, and a precondition is provided for the effective reaction in the chlorination furnace; 4. accurately measuring the consumption of high titanium slag and petroleum coke, and providing data support for cost calculation and improvement of process technology; 5. the stable feeding can effectively ensure the stability of the reaction in the furnace.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of the present invention;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the azimuth or positional relationship indicated by the terms "inner", "outer", etc. appears to be based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "configured," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the present embodiment provides a system and a method for monitoring and controlling real-time flow of a pneumatic conveying device based on DCS.
In this embodiment, a method for monitoring and controlling real-time flow of a pneumatic conveying device based on DCS includes:
s1, measuring and obtaining an hour feeding quantity V of a conveying tank, and determining a flow control instruction Y of the conveying tank;
s2, taking the hour feeding quantity V as a real-time value of a flow control PID, taking a flow control instruction Y as a set value of the flow control PID, and adjusting the feeding speed in real time by changing the set value;
s3, setting a weight low limit value A of the conveying tank, taking the low limit value A as a manual and automatic control switching condition of a control system corresponding to the flow control PID, and sending a prompt after the manual and automatic switching condition is reached;
s4, fixing the conveying speed of the conveying tank;
s5, pressurizing the buffer tank at the upper part of the conveying tank until the pressure of the buffer tank is greater than that of the conveying tank;
s6, opening a balance valve between the conveying tank and the buffer tank, and then opening a feed supplementing valve of the conveying tank to supplement the conveying tank;
s7, stopping feeding when the weight of the conveying tank reaches a set high limit value B, and closing a feeding valve and a buffer valve;
and S8.100s later, the control is changed into automatic control.
In this embodiment, a real-time flow monitoring control system of a pneumatic conveying device based on DCS includes: the weight monitoring and parameter obtaining module is used for monitoring the weight change amount of the conveying tank and calculating the hour feeding amount; the manual automatic switching module is used for setting the manual automatic switching condition of the control system corresponding to the flow control PID and sending a switching prompt after the manual automatic switching condition is reached; the PID control module is used for taking the flow control instruction Y of the conveying tank as a set value of a flow control PID and taking the hour feeding quantity V as a measured value of a boiler air supply quantity control PID, and adopting a PID control algorithm in a DCS system for control; and the feeding control module is used for controlling the feeding device to perform feeding operation and fix the conveying speed when the weight of the conveying tank is lower than the lower limit value A.
In this embodiment, feed supplement device includes buffer tank and storage tank, the buffer tank is installed on delivery tank upper portion, and this buffer tank and delivery tank intercommunication, and the intercommunication department is provided with the relief valve, storage tank and buffer tank intercommunication, storage tank and buffer tank junction are provided with the feed supplement valve. Pressure monitors are arranged in the buffer tank and the conveying tank and used for monitoring the internal pressure of the buffer tank and the conveying tank. The weight monitoring and parameter obtaining module comprises a weighing sensor, and the weighing sensor is arranged at the bottom of the conveying pipe and used for monitoring the weight change of the conveying pipe in real time.
The working process is based on the DCS system and the weight of the conveying tank is monitored in real time by accessing a high-precision weighing sensor. After the weight of the weighing sensor is collected, the average treatment is carried out on the weight change quantity of 20 5 seconds, the weight change quantity is divided by 5 to obtain the feeding speed per second, and the feeding speed per second is multiplied by 3600 seconds to obtain the hour feeding quantity V. And then the hour feeding quantity V is used as a real-time value of PID control of the DCS system, an operator only needs to input a set value on a picture, the feeding speed is stably controlled through a large-lag PID parameter, and the feeding speed is adjusted in real time through changing the set value.
When the weighing sensor monitors that the conveyed weight is lower than the lower limit value A, the manual automatic control switching condition of the control system corresponding to the flow control PID is achieved, and the control system is switched from automatic to manual. According to the real-time speed before feeding and the output value of PID control, maintaining fixed output to realize stable conveying during feeding of the conveying tank; and simultaneously, the real-time value is set to be a value matched with the current output through a program, so that the purpose of conveying and metering during the feeding period of the conveying tank is achieved. When the weight of the conveying tank is at a low value, the feeding is started to fix the conveying speed, meanwhile, the buffer tank at the upper part of the conveying tank is pressurized, when the pressure of the buffer tank is higher than that of the conveying tank, a balance valve between the buffer tank and the conveying tank is opened, then a feeding valve of the conveying tank is opened, and feeding to the conveying tank is started. Stopping feeding when the weight of the conveying tank is at a high value, closing a feeding valve of the conveying tank, and closing a balance valve between the buffer tank and the conveying tank. After 100s the transport speed becomes automatically adjusted.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The real-time flow monitoring control method of the pneumatic conveying device based on the DCS is characterized by comprising the following steps of:
s1, measuring and obtaining an hour feeding quantity V of a conveying tank, and determining a flow control instruction Y of the conveying tank;
s2, taking the hour feeding quantity V as a real-time value of a flow control PID, taking a flow control instruction Y as a set value of the flow control PID, and adjusting the feeding speed in real time by changing the set value;
s3, setting a weight low limit value A of the conveying tank, taking the low limit value A as a manual and automatic control switching condition of a control system corresponding to the flow control PID, and sending a prompt after the manual and automatic switching condition is reached;
s4, fixing the conveying speed of the conveying tank;
s5, pressurizing the buffer tank at the upper part of the conveying tank until the pressure of the buffer tank is greater than that of the conveying tank;
s6, opening a balance valve between the conveying tank and the buffer tank, and then opening a feed supplementing valve of the conveying tank to supplement the conveying tank;
s7, stopping feeding when the weight of the conveying tank reaches a set high limit value B, and closing a feeding valve and a buffer valve;
and S8.100s later, the control is changed into automatic control.
2. The control method according to claim 1, wherein,
the hour feeding quantity V is obtained by dividing the average value of the weight change quantity average treatment of 20 collection conveying tanks for 5s by 5 and multiplying the average value by 3600.
3. A pneumatic conveying device real-time flow monitoring control system based on DCS is characterized in that,
comprising the following steps: the weight monitoring and parameter obtaining module is used for monitoring the weight change amount of the conveying tank and calculating the hour feeding amount;
the manual automatic switching module is used for setting the manual automatic switching condition of the control system corresponding to the flow control PID and sending a switching prompt after the manual automatic switching condition is reached;
the PID control module is used for taking the conveying tank flow control instruction Y as a set value of a flow control PID and taking the hour feeding quantity V as a measured value of a boiler air supply quantity control PID, and adopting a PID control algorithm in a DCS system for control
And the feeding control module is used for controlling the feeding device to perform feeding operation and fix the conveying speed when the weight of the conveying tank is lower than the lower limit value A.
4. The control system of claim 3, wherein the control system,
the feeding device comprises a buffer tank and a storage tank, wherein the buffer tank is arranged on the upper portion of the conveying tank, the buffer tank is communicated with the conveying tank, a buffer valve is arranged at the communicating position, the storage tank is communicated with the buffer tank, and a feeding valve is arranged at the joint of the storage tank and the buffer tank.
5. The control system of claim 4, wherein the control system is configured to control the control system,
pressure monitors are arranged in the buffer tank and the conveying tank and used for monitoring the internal pressure of the buffer tank and the conveying tank.
6. The control system of claim 3, wherein the control system,
the weight monitoring and parameter obtaining module comprises a weighing sensor which is arranged at the bottom of the conveying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627576.1A CN116560306A (en) | 2022-12-16 | 2022-12-16 | Pneumatic conveying device real-time flow monitoring control system and method based on DCS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627576.1A CN116560306A (en) | 2022-12-16 | 2022-12-16 | Pneumatic conveying device real-time flow monitoring control system and method based on DCS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116560306A true CN116560306A (en) | 2023-08-08 |
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ID=87492136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211627576.1A Pending CN116560306A (en) | 2022-12-16 | 2022-12-16 | Pneumatic conveying device real-time flow monitoring control system and method based on DCS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116560306A (en) |
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2022
- 2022-12-16 CN CN202211627576.1A patent/CN116560306A/en active Pending
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