CN112180885A - Control system and control method for flash drying of titanium dioxide - Google Patents

Control system and control method for flash drying of titanium dioxide Download PDF

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Publication number
CN112180885A
CN112180885A CN202011178233.2A CN202011178233A CN112180885A CN 112180885 A CN112180885 A CN 112180885A CN 202011178233 A CN202011178233 A CN 202011178233A CN 112180885 A CN112180885 A CN 112180885A
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China
Prior art keywords
control
unit
control system
titanium dioxide
control unit
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Pending
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CN202011178233.2A
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Chinese (zh)
Inventor
孙绍华
徐毅
刘志杰
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Dalian Oppner Turbine Power Technology Co ltd
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Dalian Oppner Turbine Power Technology Co ltd
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Priority to CN202011178233.2A priority Critical patent/CN112180885A/en
Publication of CN112180885A publication Critical patent/CN112180885A/en
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    • 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], computer integrated manufacturing [CIM]
    • G05B19/4185—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], computer integrated manufacturing [CIM] characterised by the network communication
    • 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
    • G05B2219/33139—Design of industrial communication system with expert system
    • 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]

Abstract

The invention relates to a control system and a control method for flash evaporation drying of titanium dioxide, wherein the control system comprises a power supply unit, a signal input unit, a control unit, a signal output unit and an upper computer; the upper computer communicates with the control unit through a communication protocol, sends a control instruction to the control unit in a downlink mode, and receives the equipment state parameters and the control information sent by the control unit in an uplink mode. Compared with the control device of the current titanium dioxide drying production line, the control system related by the invention has stronger specialty, higher reliability and wider applicability; the man-machine interface integrates the gas compressor, the OP16 gas turbine and the flash evaporation equipment into a whole, so that the operation is convenient, and the production efficiency and the comprehensive energy utilization efficiency are improved.

Description

Control system and control method for flash drying of titanium dioxide
Technical Field
The invention relates to the technical field of titanium dioxide processing production, in particular to the production field of titanium dioxide flash evaporation drying.
Background
As the gas turbine for driving the load of the generator, the gas turbine of a single-shaft, single-stage centrifugal compressor and single-stage centripetal turbine is adopted, and the OP16 series gas turbine generator set has the characteristics of simple structure, firmness and durability, no bearing at the hot end, high comprehensive heat efficiency and the like.
The flash evaporation drying production of the titanium dioxide is that hot air enters the bottom of a dryer in a tangent mode and forms a powerful rotary wind field under the drive of a stirrer. The wet titanium dioxide material is put on a belt conveyor from a storage bin and then is sent into a dryer by a spiral feeder, and under the action of a stirrer, the wet titanium dioxide material is dispersed and crushed, and is fully contacted with hot air, heated and dried. And under the action of a draught fan, the dried titanium dioxide is brought to a flash evaporation bag for dust collection treatment.
The production lines of titanium dioxide flash drying are different. However, how to combine the OP16 gas turbine generator set as a process device with flash evaporation drying production is not mentioned in the published technical documents and patent documents, and the domestic application of the gas turbine is limited to power generation, cogeneration or combined cooling, heating and power generation. In addition, the OP16 gas turbine generator set is added into the titanium dioxide flash drying production, so that the control of each device or equipment is inconsistent, and the centralized control performance is not strong. In the process of test machine joint debugging, a manual operation mode is basically adopted, so that the test machine efficiency and the test machine result have obvious defects.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a control system and a control method for titanium dioxide flash drying.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control system for flash drying of titanium dioxide comprises a control system, wherein the control system comprises a power supply unit, a signal input unit, a control unit, a signal output unit and an upper computer; the upper computer communicates with the control unit through a communication protocol, sends a control instruction to the control unit in a downlink mode, and receives the equipment state parameters and the control information sent by the control unit in an uplink mode.
Further, the signal input unit is used for collecting signals of an OP16 gas turbine generator set, a gas compressor, a front module, a flue gas valve group, a flash dryer, a storage bin, a flash bag and an opening and closing station.
Furthermore, the control unit comprises a CPU module, a digital signal input and output module, an analog signal input and output module and a high-speed counting module; the CPU module is used for receiving the signals processed by the signal input unit and the instruction signals of the upper computer.
Furthermore, the control unit has a process system parameter acquiring and processing function, a control instruction acquiring function, a function selecting function and an output processing function.
Further, the signal output unit is used for receiving the control signal output by the control unit and outputting the control signal to the response controlled device.
Furthermore, the power supply unit realizes power supply of the signal input unit, the control unit, the signal output unit and the upper computer.
Further, the control method of the control system for titanium dioxide flash drying comprises the following specific steps:
(1) the process system parameter acquisition and processing function is to convert the engineering value of the process parameters acquired by the signal input unit;
(2) the control system parameter acquisition and processing function is used for carrying out numerical processing on the parameters from the process system parameter acquisition and processing function;
(3) the control instruction acquisition function analyzes the received upper computer instruction;
(4) the function selection function is to judge the control mode according to the control mode instruction of the control instruction acquisition function and enter specific function control;
(5) the output processing function transmits the control signal of the control unit to the responding controlled device through the signal output unit.
Compared with the prior art, the invention has the beneficial effects that:
the control system for titanium dioxide flash drying adopts a modular technology to carry out measurement and control, and improves the universality and flexibility of the control system. The requirements of different production lines on the control function can be met in the control system. Compared with the control device of the existing titanium dioxide drying production line, the control system related by the invention has the advantages of stronger specialty, higher reliability and wider applicability.
The control system for the flash evaporation drying of the titanium dioxide adopts an integrated process control package, so that the control precision is improved; the signal input of various devices or devices of the production line can be completely received, so that the signal conversion error is eliminated, and the control effect is improved.
The control system for titanium dioxide flash drying integrates a gas compressor, an OP16 gas turbine and flash equipment into a whole through a human-computer interface, is convenient to operate, and improves the production efficiency and the comprehensive utilization efficiency of energy.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of a control method of the present invention;
FIG. 3 is a flow chart of a titanium dioxide flash drying process;
in the figure: 1. a control system; 2. a power supply unit; 3. a signal input unit; 4. a control unit; 5. a signal output unit; 6. an upper computer; 7. a gas compressor; 8. a front module; 9. OP16 gas turbine; 10. a smoke valve group; 11. a storage bin; 12. a flash dryer; 13. a flash evaporation bag; 101. acquiring and processing parameters of a process system; 102. controlling system parameter acquisition and processing functions; 103. a control instruction acquisition function; 104. a function selection function; 105. and outputting the processing function.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a control system for flash evaporation drying of titanium dioxide comprises a control system 1, wherein the control system 1 comprises a power supply unit 2, a signal input unit 3, a control unit 4, a signal output unit 5 and an upper computer 6; the signal input unit 3 is connected with the control unit 4 through a bus, the control unit 4 is connected with the signal output unit 5 through a bus, the upper computer 6 is communicated with the control unit 4 through a communication protocol, sends a control instruction to the control unit 4 in a downlink mode, and receives equipment state parameters and control information sent by the control unit 4 in an uplink mode.
Further, the signal input unit 3 is used for acquiring signals of an OP16 gas turbine 9 generator set, a gas compressor 7, a front module 8, a flue gas valve group 10, a flash dryer 12, a storage bin 11, a flash bag 13 and an opening and closing station.
The signal input unit 3 receives signals from the field measuring instrument, firstly receives the signal input ends of the safety barrier and the converter, processes the signals in the isolator, the safety barrier and the converter, and sends the signals to the digital signal input module and the analog signal input module of the control unit 4 through the signal output ends. Thus, the signal input unit 3 transmits OP16 gas turbine generator set 9, gas compressor 7, flue gas valve group 10, flash dryer 12, silo 11, flash bag 13 and the switching station signal to the control unit 4.
Furthermore, the control unit 4 comprises a CPU module, a digital signal input/output module, an analog signal input/output module, and a high-speed counting module; the CPU module synthesizes various received signals processed by the signal input unit and the instruction signal of the upper computer, and generates a control signal through logical operation and logical judgment; the control signal generated by the CPU module operation is output to the signal output unit 5 for control.
Further, the control unit 4 has a process system parameter acquiring and processing function 101, a control system parameter acquiring and processing function 102, a control instruction acquiring function 103, a function selecting function 104, and an output processing function 105.
Further, the signal output unit 5 is configured to receive the control signal output by the control unit 4, and output the control signal to the response controlled device.
The response controlled equipment comprises a gas compressor 7, a front module 8, an OP16 gas turbine generator set 9, a flue gas valve group 10, a storage bin 11, a flash dryer 12 and a flash bag 13.
The signal output unit 5 adopts an intermediate relay, a safety relay and a safety barrier to transmit a control instruction of the control unit 4 to an OP16 gas turbine generator set 9, a gas compressor 7, a front module 8, a flue gas valve group 10, a flash dryer 12, a stock bin 11, a flash bag 13 and an opening and closing station signal for control.
Further, the power supply unit 2 supplies power to the signal input unit 3, the control unit 4, the signal output unit 5 and the upper computer 6. The control system 1 power input is 230 VAC. The power supply unit 2 is realized by a finished product power supply module, preferably, Firex QUINTPS/1 AC/24VDC/40 is selected, the power supply module has high reliability and wide input voltage range, has the function of permanently providing current which is 1.5 times of rated current, has a selective fusing technology, and can effectively protect load equipment.
The control system of the invention can be applied to one or more than two titanium dioxide flash evaporation drying production lines, as shown in fig. 2 and 3, wherein fig. 3 shows two titanium dioxide flash evaporation drying production lines.
The control method of the control system of the present invention is described below with reference to fig. 2 and 3:
the process system parameter acquiring and processing function 101 is used for converting the engineering value of the process parameters acquired by the signal input unit 3;
the control system parameter acquisition and processing function 102 is to numerically process the parameters from the process system parameter acquisition and processing function 101;
the control instruction acquisition function 103 analyzes the received instruction of the upper computer 6; the instructions comprise a control mode instruction, an OP16 gas turbine power plant unit remote control instruction, a gas compressor remote control instruction, a gas valve bank control instruction, a stock bin control instruction, a flash dryer control instruction and a flash bag control instruction.
The function selecting function 104 determines the control mode according to the control mode instruction of the control instruction acquiring function 103, and enters specific function control; the functions comprise seven parts of equipment start-stop control, initial load grid connection, flue gas valve group control, flash evaporation dryer hearth temperature control, raw material transmission control, raw material drying control and dry material bag discharging control.
Controlling the start and stop of the equipment: and starting, firstly, confirming that the opening degree of a bypass valve of the smoke valve group 10 is between 70% and 100%, then starting the gas compressor 7, and starting the OP16 gas turbine 9 when the inlet pressure of the front module 8 reaches an allowable value. After the OP16 gas turbine 9 reaches the idle state, the OP16 gas turbine 9 is started.
And (4) stopping the operation of the equipment when the storage bin 11 is empty and the temperature of the outlet of the flash dryer 12 is continuously increased to 200 ℃. Directly reducing the load of an OP16 gas turbine 9 to 100kW, operating for 2-3 minutes, and stopping and leaving the net until cooling is finished; the operation of the gas compressor 7 was stopped after the OP16 gas turbine 9 was stopped for 1 minute.
And initial load synchronization, namely applying for initial load synchronization to the switching station after the OP16 gas turbine 9 is started. After the OP16 gas turbine 9 reaches the idle load state and receives the on-off station permitted grid connection signal, the grid connection button is clicked on the upper computer 6, so that the OP16 gas turbine 9 is connected to the grid at the initial load of 100 kW.
The smoke valve set is controlled and consists of three valves, namely a bypass valve, a No. 1 air inlet valve and a No. 2 air inlet valve. Before the equipment is started, the opening degree of the bypass valve is 70-100%, and the opening degrees of the No. 1 air inlet valve and the No. 2 air inlet valve are 0%, namely, the bypass valve is fully closed. When the equipment is operated, the total opening degree of the three valves is ensured to be not less than 90 percent. After the equipment is stopped, the opening degrees of the three valves are restored to the state before starting.
The flash dryer furnace temperature is controlled by the OP16 gas turbine 9 exhaust temperature, and the temperature difference between the two is between 80 ℃ and 120 ℃. Initially, if a single production line produces, the opening degree of the air inlet valve of the production line is adjusted to 30-70%, if two production lines produce simultaneously, the opening degree of the air inlet valve of each production line is adjusted to 20-60%, and meanwhile, the opening degree of the bypass valve is adjusted to 30% or completely closed. Controlling the temperature of a hearth between 250 ℃ and 350 ℃, and when the temperature of the hearth exceeds 250 ℃, permitting feeding for drying production; when the temperature of the hearth is in a descending or ascending trend, the power generation active power of the OP16 gas turbine 9 is automatically increased or decreased, so that the temperature of the exhaust gas of the OP16 gas turbine 9 is increased or decreased, and the temperature of the hearth is kept stable in a specified temperature range.
And (3) controlling raw material delivery, namely starting a bin conveyor belt when the temperature of a hearth of the flash dryer 12 exceeds 250 ℃, delivering the wet titanium dioxide powder to a spiral feeder, and delivering the wet titanium dioxide powder and the flash auxiliary agent into the flash dryer 12 together by the feeder.
And (3) raw material drying control, wherein in the beginning flash drying production, the temperature of an outlet of a flash dryer is continuously increased, the stirrer is forced to rotate and stir, the running speed of a raw material conveying belt is stabilized, and the frequency of an induced draft fan is adjusted to keep the material flowing speed in the dryer.
And controlling the dry material to be discharged from the bag, and forcing the vibration motor to operate to enable the dry material to jump off the cloth bag and flow to the bottom of the bag.
The output processing function 105 transmits the control signal of the control unit 4 to the controlled device responding thereto through the signal output unit 5.
The control system 1 of the invention is used for controlling the application of the gas turbine in flash evaporation drying of titanium dioxide.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a control system for titanium white powder flash drying which characterized in that: the control system comprises a control system (1), wherein the control system (1) comprises a power supply unit (2), a signal input unit (3), a control unit (4), a signal output unit (5) and an upper computer (6); the signal input unit (3) is connected with the control unit (4) through a bus, the control unit (4) is connected with the signal output unit (5) through the bus, the upper computer (6) is communicated with the control unit (4) through a communication protocol, a control instruction is sent to the control unit (4) in a downlink mode, and the control unit receives equipment state parameters and control information sent by the control unit (4) in an uplink mode.
2. The control system for flash drying of titanium dioxide according to claim 1, wherein: the signal input unit (3) is used for collecting signals of an OP16 gas turbine (9) generator set, a gas compressor (7), a front module (8), a smoke valve group (10), a flash dryer (12), a storage bin (11), a flash bag (13) and an opening and closing station.
3. The control system for flash drying of titanium dioxide according to claim 1, wherein: the control unit (4) comprises a CPU module, a digital signal input and output module, an analog signal input and output module and a high-speed counting module; the CPU module is used for receiving the signals processed by the signal input unit (3) and the instruction signals of the upper computer (6).
4. The control system for titanium dioxide flash drying according to claim 3, wherein: the control unit (4) is provided with a process system parameter acquiring and processing function (101), a control system parameter acquiring and processing function (102), a control instruction acquiring function (103), a function selecting function (104) and an output processing function (105).
5. The control system for flash drying of titanium dioxide according to claim 1, wherein: the signal output unit (5) is used for receiving the control signal output by the control unit (4) and outputting the control signal to the response controlled equipment.
6. The control system for flash drying of titanium dioxide according to claim 1, wherein: the power supply unit (2) is used for supplying power to the signal input unit (3), the control unit (4), the signal output unit (5) and the upper computer (6).
7. A control method of a control system for titanium dioxide flash drying production is characterized in that: the method comprises the following specific steps:
(1) the technological system parameter acquisition and processing function (101) is used for converting engineering values of technological process parameters acquired by the signal input unit (3);
(2) the control system parameter acquisition and processing function (102) numerically processes parameters from the process system parameter acquisition and processing function (101);
(3) the control instruction acquisition function (103) analyzes the received instruction of the upper computer (6);
(4) the function selection function (104) judges the control mode according to the control mode instruction of the control instruction acquisition function (103) and enters into specific function control;
(5) the output processing function (105) transmits the control signal of the control unit (4) to the responding controlled device through the signal output unit (5).
CN202011178233.2A 2020-10-29 2020-10-29 Control system and control method for flash drying of titanium dioxide Pending CN112180885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011178233.2A CN112180885A (en) 2020-10-29 2020-10-29 Control system and control method for flash drying of titanium dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011178233.2A CN112180885A (en) 2020-10-29 2020-10-29 Control system and control method for flash drying of titanium dioxide

Publications (1)

Publication Number Publication Date
CN112180885A true CN112180885A (en) 2021-01-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011178233.2A Pending CN112180885A (en) 2020-10-29 2020-10-29 Control system and control method for flash drying of titanium dioxide

Country Status (1)

Country Link
CN (1) CN112180885A (en)

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