CN113721571A - Control method of DCS (distributed control System) for producing titanium sponge - Google Patents
Control method of DCS (distributed control System) for producing titanium sponge Download PDFInfo
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- CN113721571A CN113721571A CN202111013414.4A CN202111013414A CN113721571A CN 113721571 A CN113721571 A CN 113721571A CN 202111013414 A CN202111013414 A CN 202111013414A CN 113721571 A CN113721571 A CN 113721571A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000001816 cooling Methods 0.000 claims abstract description 79
- 238000004821 distillation Methods 0.000 claims abstract description 61
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052786 argon Inorganic materials 0.000 claims abstract description 30
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000011946 reduction process Methods 0.000 claims abstract description 14
- 238000010009 beating Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims description 19
- 239000010936 titanium Substances 0.000 claims description 17
- 229910052719 titanium Inorganic materials 0.000 claims description 17
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 6
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims 2
- 238000005086 pumping Methods 0.000 claims 1
- 230000009469 supplementation Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006052 feed supplement Substances 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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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] or computer integrated manufacturing [CIM]
- G05B19/41875—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 quality surveillance of production
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32368—Quality control
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- 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]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a control method of a DCS (distributed control system) for producing titanium sponge, which relates to the technical field of titanium sponge production and comprises a horizontal tank, a reactor and a control computer, wherein a head tank is arranged on the right side of the horizontal tank through a pipeline, a material beating pump and a material beating valve are sequentially arranged between the horizontal tank and the head tank, and one side of the head tank is connected with an automatic feeding system through a pipeline. The control method of the DCS for producing the titanium sponge mainly comprises the steps of automatically controlling a reduction process, automatically controlling a distillation process and automatically controlling a cooling process; the reduction process can realize automatic feeding, automatic argon charging and discharging, furnace temperature detection feedback and automatic control of opening of a cooling fan and a valve; the distillation process can realize automatic control of water level and water quantity of the cold-end reactor, automatic starting of a vacuum system, automatic cleaning of a passageway pipe, temperature setting and required time of each stage of distillation; the cooling process can realize automatic argon filling protection, automatic introduction of indirect water and direct water cooling, and automatic water drainage after cooling.
Description
Technical Field
The invention relates to the technical field of titanium sponge production, in particular to a control method of a DCS (distributed control system) for producing titanium sponge.
Background
The titanium sponge is a spongy metallic titanium produced by a metallothermic reduction method, and is a main raw material for preparing industrial titanium alloy. The production of titanium sponge is a basic link in the titanium industry, and is a raw material of titanium materials, titanium powder and other titanium components. Titanium tetrachloride is obtained from ilmenite, which is then placed in a sealed stainless steel tank and filled with argon gas to react with magnesium metal, thus obtaining titanium sponge.
All link of present titanium sponge production all manual observation and manual operation lead to that temperature control is inhomogeneous, unstable during the reduction, and distillation process adopts each vacuum pump to open among the manual control vacuum system, leads to personnel intensity of labour great, and the manual observation data observation error is big simultaneously, observes the promptness poor, easily influences titanium sponge product quality, for this reason, we provide a titanium sponge production DCS system's control method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method of a DCS (distributed control system) for producing titanium sponge, which solves the problems that all links of the current titanium sponge production proposed in the background art are manually observed and operated, so that the temperature control during reduction is uneven and unstable, all vacuum pumps in a manually controlled vacuum system are adopted in the distillation process, so that the labor intensity of personnel is higher, and meanwhile, the observation error of manually observed data is large, the observation timeliness is poor, and the quality of a titanium sponge product is easily influenced.
In order to achieve the purpose, the invention is realized by the following technical scheme: the control method of the DCS system for producing the sponge titanium comprises a horizontal tank, a reactor and a control computer, wherein a head tank is arranged on the right side of the horizontal tank through a pipeline, a material feeding pump and a material feeding valve are sequentially arranged between the horizontal tank and the head tank, one side of the head tank is connected with an automatic feeding system through a pipeline, a feeding valve is arranged between the head tank and the automatic feeding system, the reactor is arranged on one side of the automatic feeding system through a pipeline, a feeding valve is arranged between the automatic feeding system and the reactor, a reduction thermocouple and a cooling fan are arranged on the left side of the reactor for a reduction stage, an air inlet valve is arranged between the cooling fan and the reactor, a pressure transmitter is arranged on the right side of the reactor for the reduction stage, and the control computer is electrically connected to one end of the material feeding pump.
Optionally, be used for the distillation stage one side of reactor is passed through the pipe mounting and is had the cold junction reactor, and the outside of cold junction reactor installs outlet valve and inlet valve respectively, is used for the distillation stage distillation thermocouple and automatic passageway cleaning device are installed in the left side of reactor, are used for the distillation stage total control valve is installed on the right side of reactor, and the vacuum unit is installed through dividing control valve to one side of total control valve.
Optionally, an automatic argon flushing system is installed on one side of the reactor for the cooling stage through a pipeline, a cooling argon filling valve is arranged between the automatic argon flushing system and the reactor, a water drain valve is installed on the left side of the reactor for the cooling stage, and an indirect water valve and a direct water valve are respectively installed on the right side of the reactor for the cooling stage.
Optionally, the control method includes the following steps:
A. a reduction stage;
B. a distillation stage;
C. and (5) a cooling stage.
Optionally, the step a and the step b include the following specific steps:
a1, in the reduction process, the liquid level in the head tank can be automatically transmitted to a control computer, and when the head tank needs to be supplemented with raw materials, an operator can automatically start a material-beating pump and a material-beating valve through the control computer to supplement the raw materials from the horizontal tank to the head tank;
a2, transferring the raw materials in the head tank into an automatic feeding system through a feeding valve, and feeding the raw materials into the reactor through a feeding valve by the automatic feeding system; before reduction feeding, the material speed of each reduction stage is input through a control computer, the automatic feeding system operates normally after feeding is started, the automatic feeding system can accumulate the total feeding amount, display the current material speed, automatically close a feeding valve when each reduction stage is finished, and feed the next stage after magnesium chloride is discharged;
a3, a reduction thermocouple can measure the temperature of each section of the reactor and automatically feed back the temperature to an over-control computer, when the reduction temperature is higher than a set upper limit, a cooling fan and an air inlet valve are automatically started to cool the reactor, the frequency of the cooling fan is automatically adjusted along with the temperature reduction, and when the temperature reaches a lower limit, the air inlet valve is automatically closed; the pressure in the reduction process reactor can be transmitted to a control computer by means of a pressure transmitter and can be automatically vented when the pressure is above an upper limit.
Optionally, the step B and the distillation stage comprise the following specific steps:
b1, in the distillation process, volatile matters are transferred from the reactor to a cold-end reactor, the cold-end reactor is provided with an automatic water inlet valve and a water outlet valve, when the water level of the cold-end reactor needs to be raised or lowered, the water inlet valve can be automatically opened through a control computer, and the opening angle of the water outlet valve can be automatically adjusted;
b2, inputting the time and temperature required by each stage of distillation through a control computer, and feeding back the current temperature data in real time by a distillation thermocouple; the vacuum pumps required by each distillation stage can be input through a control computer, the vacuum units, the main control valves and the sub-control valves can automatically switch the vacuum pumps according to set time, and the vacuum pumps and the corresponding control valves are automatically switched after the time is up;
b3, inputting the cleaning interval time of the automatic passage cleaning device through the control computer during distillation, and automatically cleaning the passage by the automatic passage cleaning device to ensure the distillation process to be smoothly carried out.
Optionally, the step C and the cooling step include the following specific steps:
c1, in the cooling process, when the pressure in the reactor is lower than the lower limit, the automatic argon filling system automatically replenishes argon to the cooling reactor, and when the pressure reaches the upper limit, the cooling argon filling valve is automatically closed, and the pressure replenishment is stopped;
c2, setting the opening time of the indirect water valve and the direct water valve by the control computer during cooling, automatically introducing water to cool the reactor, automatically opening the water drain valve after cooling, automatically closing the water inlet valve, and completing the cooling process.
Optionally, in the reduction stage, the pressure range of the tank and the pressure range of the pipe of the reactor are set to be 0.005-0.025Mpa and 0.25-0.05Mpa respectively through a control computer, and the temperature range of the reduction observation point in the reactor is set to be 750-850 ℃.
Optionally, the temperature of each section of the reactor is set to 950-970 ℃ through a control computer in the distillation stage.
Optionally, in the cooling stage, the pressure in the reactor is set to be 0.03-0.05Mpa by a control computer.
The invention provides a control method of a DCS (distributed control system) for producing sponge titanium, which has the following beneficial effects:
the control method of the DCS for producing the titanium sponge mainly comprises the steps of automatically controlling a reduction process, automatically controlling a distillation process and automatically controlling a cooling process; the reduction process can realize automatic feeding, automatic argon charging and discharging, furnace temperature detection feedback and automatic control of opening of a cooling fan and a valve; the distillation process can realize automatic control of water level and water quantity of the cold-end reactor, automatic starting of a vacuum system, automatic cleaning of a passageway pipe, temperature setting and required time of each stage of distillation; the cooling process can realize automatic argon filling protection, automatic introduction of indirect water and direct water cooling, and automatic water drainage after cooling is finished; the problems that manual operation and manual measurement are adopted in the production process of the titanium sponge at present, deviation is easy to occur in the operation process, and the operation process is not accurate enough are solved.
The control method of the DCS for producing the sponge titanium further improves the automation degree in the production process of the sponge titanium, gradually reduces the labor intensity, and adopts the DCS control system for producing the sponge titanium, and specifically comprises the functions of automatic feed supplement of an overhead tank, automatic feeding in the reduction process, automatic control of reduction aeration and cooling, automatic monitoring of the liquid level of a reduction reactor, automatic weighing of magnesium chloride discharge, automatic control of reduction tank pressure and pipe pressure, automatic dredging of a distillation channel in the distillation period, automatic control of a cooling water valve in the distillation period, automatic water cooling in the product cooling period, automatic acquisition of electric quantity of each section of a resistance furnace and the like.
According to the control method of the DCS for producing the titanium sponge, a plurality of resistance furnaces of an operation station are controlled by one computer during working, the material speed of each stage, the material feeding amount of each stage, the temperature control range of each stage and the total material feeding amount of the batch of titanium sponge are input for reducing for a plurality of times at one time during reduction, automatic material feeding is firstly realized from a horizontal tank by an elevated tank so as to ensure the production of the batch of titanium sponge; then, valves of all feeding pipelines are automatically opened to realize automatic feeding, when the temperature reaches the upper limit of the temperature input at the stage in the reduction period, the ventilation blind plate is automatically opened, and the fan valve is automatically opened to realize automatic frequency control air supply; during the distillation, firstly inputting each stage of distillation and the controlled temperature, the opening time of a vacuum pump in each stage, and the water level and the opening amount of a water inlet valve corresponding to the temperature of condensate; automatic introduction of indirect water and direct water is realized during the cooling period after the distillation of the product is finished, automatic water drainage is realized after the cooling is finished, and argon is automatically protected during the cooling period; the operation is automatically carried out, and meanwhile, the operation signals are fed back to a control computer of the operation station in real time, the operator of the operation station can master the current condition in time, and meanwhile, each node can alarm in time to remind the controller when an abnormal condition occurs.
Drawings
FIG. 1 is a system control schematic diagram of a control method of a titanium sponge production DCS system according to the invention.
In the figure: 1. horizontal tank; 2. a material-beating pump; 3. a material beating valve; 4. a head tank; 5. a charging valve; 6. an automatic feeding system; 7. a feed valve; 8. reducing the thermocouple; 9. a cooling fan; 10. an air inlet valve; 11. a reactor; 12. a pressure transmitter; 13. a water outlet valve; 14. a cold end reactor; 15. a water inlet valve; 16. distilling the thermocouple; 17. an automatic aisle cleaning device; 18. a master control valve; 19. sub-control valves; 20. a vacuum unit; 21. an automatic argon filling system; 22. cooling the argon filling valve; 23. an indirect water valve; 24. a direct water valve; 25. a water drain valve; 26. and a control computer.
Detailed Description
Referring to fig. 1, the present invention provides a technical solution: a control method of a DCS system for producing sponge titanium comprises a horizontal tank 1, a reactor 11 and a control computer 26, wherein a head tank 4 is arranged on the right side of the horizontal tank 1 through a pipeline, a material-beating pump 2 and a material-beating valve 3 are sequentially arranged between the horizontal tank 1 and the head tank 4, one side of the head tank 4 is connected with an automatic feeding system 6 through a pipeline, a feeding valve 5 is arranged between the head tank 4 and the automatic feeding system 6, the reactor 11 is arranged on one side of the automatic feeding system 6 through a pipeline, a feeding valve 7 is arranged between the automatic feeding system 6 and the reactor 11, a reduction thermocouple 8 and a cooling fan 9 are arranged on the left side of the reactor 11 for the reduction stage, an air inlet valve 10 is arranged between the cooling fan 9 and the reactor 11, a pressure transmitter 12 is arranged on the right side of the reactor 11 for the reduction stage, the control computer 26 is electrically connected to one end of the material-feeding pump 2. A cold end reactor 14 is installed on one side of the reactor 11 for the distillation stage through a pipeline, a water outlet valve 13 and a water inlet valve 15 are installed on the outer side of the cold end reactor 14 respectively, a distillation thermocouple 16 and an automatic passageway cleaning device 17 are installed on the left side of the reactor 11 for the distillation stage, a main control valve 18 is installed on the right side of the reactor 11 for the distillation stage, and a vacuum unit 20 is installed on one side of the main control valve 18 through a branch control valve 19. An automatic argon filling system 21 is installed on one side of the reactor 11 for the cooling stage through a pipeline, a cooling argon filling valve 22 is arranged between the automatic argon filling system 21 and the reactor 11, a water drain valve 25 is installed on the left side of the reactor 11 for the cooling stage, and an indirect water valve 23 and a direct water valve 24 are respectively installed on the right side of the reactor 11 for the cooling stage.
The control method comprises the following steps:
A. a reduction stage;
B. a distillation stage;
C. and (5) a cooling stage.
A. The reduction stage comprises the following specific steps:
a1, in the reduction process, the liquid level in the head tank 4 can be automatically transmitted to the control computer 26, and when the head tank 4 needs to be supplemented with raw materials, an operator can automatically start the material feeding pump 2 and the material feeding valve 3 through the control computer 26 to supplement the raw materials from the horizontal tank 1 to the head tank 4;
a2, transferring the raw materials in the head tank 4 to an automatic feeding system 6 through a feeding valve 5, and feeding the raw materials into a reactor 11 through a feeding valve 7 by the automatic feeding system 6; before reduction charging, the material speed of each reduction stage is input through the control computer 26, the automatic charging system 6 operates normally after charging is started, the automatic charging system 6 can accumulate the total charging amount, display the current material speed, automatically close the charging valve 7 when each reduction stage is finished, and charge the next stage after discharging magnesium chloride;
a3 and a reduction thermocouple 8 can measure the temperature of each section of the reactor 11 and automatically feed back the temperature to the over-control computer 26, when the reduction temperature is higher than the set upper limit, the cooling fan 9 and the air inlet valve 10 are automatically started to cool the reactor 11, the frequency of the cooling fan 9 is automatically adjusted along with the temperature reduction, and when the temperature reaches the lower limit, the air inlet valve 10 is automatically closed; the pressure in the reduction process reactor 11 can be transmitted to the control computer 26 by means of the pressure transmitter 12 and can be automatically vented when the pressure is above an upper limit.
In the reduction stage, the pressure range of the tank of the reactor 11 is set to be 0.005-0.025MPa and the pipe pressure is set to be 0.25-0.05MPa through the control computer 26, and the temperature range of the reduction observation point in the reactor 11 is set to be 750-850 ℃.
B. The distillation stage comprises the following specific steps:
b1, in the distillation process, volatile matters are transferred from the reactor 11 to the cold-end reactor 14, the cold-end reactor 14 is provided with an automatic water inlet valve 15 and a water outlet valve 13, when the water level of the cold-end reactor 14 needs to be raised or lowered, the water inlet valve 15 can be automatically opened through the control computer 26, and the opening angle of the water outlet valve 13 can be automatically adjusted;
b2, inputting the time and temperature required by each stage of distillation through the control computer 26, and feeding back the current temperature data in real time by the distillation thermocouple 16; the vacuum pumps needed by each distillation stage can be input through the control computer 26, the vacuum unit 20, the main control valve 18 and the sub-control valves 19 can automatically switch the vacuum pumps according to set time, and the vacuum pumps and the corresponding control valves can be automatically switched after the time comes;
b3, inputting the cleaning interval time of the automatic aisle cleaning device 17 through the control computer 26 during distillation, and automatically cleaning the aisle by the automatic aisle cleaning device 17 to ensure the distillation process to be smoothly carried out.
The temperature of each section of the reactor 11 is set at 950-970 ℃ through the control computer 26 in the distillation stage.
C. The cooling stage comprises the following specific steps:
c1, in the cooling process, when the pressure in the reactor 11 is lower than the lower limit, the automatic argon filling system 21 automatically replenishes argon gas for the cooling reactor 11, and when the pressure reaches the upper limit, the cooling argon filling valve 22 automatically closes to stop pressure replenishment;
c2, setting the opening time of the indirect water valve 23 and the direct water valve 24 by the control computer 26 during the cooling period, automatically introducing water to cool the reactor 11, automatically opening the water discharge valve 25 after the cooling is finished, and automatically closing the water inlet valve 15 to finish the cooling process.
In the cooling stage, the pressure in the reactor 11 is set to 0.03-0.05MPa by the control computer 26.
In conclusion, the control method of the DCS system for producing the titanium sponge comprises the following specific steps when in use:
A. reduction stage
A1, in the reduction process, the liquid level in the head tank 4 can be automatically transmitted to the control computer 26, when the head tank 4 needs to be supplemented with raw materials, an operator can automatically start the feeding pump 2 and the feeding valve 3 through the control computer 26 to supplement the raw materials from the horizontal tank 1 to the head tank 4, the head tank 4 is automatically supplemented with 26 tons of raw materials through the control computer 26, and the feeding valve 3 is closed after the liquid level is reached;
a2, transferring the raw materials in the head tank 4 to an automatic feeding system 6 through a feeding valve 5, and feeding the raw materials into a reactor 11 through a feeding valve 7 by the automatic feeding system 6; before reduction charging, the material speed of each reduction stage is input through the control computer 26, the automatic charging system 6 operates normally after charging is started, the automatic charging system 6 can accumulate the total charging amount, display the current material speed, automatically close the charging valve 7 when each reduction stage is finished, and charge the next stage after discharging magnesium chloride;
a3 and a reduction thermocouple 8 can measure the temperature of each section of the reactor 11 and automatically feed back the temperature to the over-control computer 26, the temperature range of a reduction observation point in the reactor 11 is set to be 750-plus 850 ℃ through the control computer 26, when the reduction temperature is higher than the set upper limit, the temperature reduction fan 9 and the air inlet valve 10 are automatically started to reduce the temperature of the reactor 11, the frequency of the temperature reduction fan 9 is automatically adjusted along with the temperature reduction, and when the temperature reaches the lower limit, the air inlet valve 10 is automatically closed; the pressure in the reduction process reactor 11 can be transmitted to the control computer 26 through the pressure transmitter 12, the pressure range of the tank of the reactor 11 is set to be 0.005-0.025Mpa and the pipe pressure is set to be 0.25-0.05Mpa through the control computer 26, and when the pressure is higher than the upper limit, the gas can be automatically discharged;
B. distillation stage
B1, in the distillation process, volatile matters are transferred from the reactor 11 to the cold-end reactor 14, the cold-end reactor 14 is provided with an automatic water inlet valve 15 and a water outlet valve 13, when the water level of the cold-end reactor 14 needs to be raised or lowered, the water inlet valve 15 can be automatically opened through the control computer 26, the opening angle of the water outlet valve 13 is automatically adjusted, the 2# water level of the cold-end reactor 14 is set during the distillation, and when the temperature is abnormal, the water level is adjusted to the 1# water level through the control computer 26;
b2, inputting the time and temperature required by each stage of distillation through the control computer 26, setting the temperature 950 and 970 ℃ of each stage of the reactor 11 through the control computer 26, and feeding back the current temperature data by the distillation thermocouple 16 in real time; the vacuum pumps needed in each stage of distillation can be input through the control computer 26, a 1# vacuum pump is used from the beginning of distillation for 12 hours, a 2# vacuum pump is used from 13 to 33 hours, 3# and 4# vacuum pumps are used after 35 hours, the vacuum unit 20, the main control valve 18 and the sub-control valves 19 can automatically switch the vacuum pumps according to set time, and the vacuum pumps and the corresponding control valves are automatically switched after the time comes;
b3, inputting the cleaning interval time of the automatic aisle cleaning device 17 through the control computer 26 during distillation, and automatically cleaning the aisle by the automatic aisle cleaning device 17 to ensure the distillation process to be smoothly carried out;
C. cooling stage
C1, a cooling process, wherein the pressure range in the reactor 11 is set to be 0.03-0.05Mpa through the control computer 26, when the pressure in the reactor 11 is lower than the lower limit, the cooling argon filling valve 22 is opened by the automatic argon filling system 21 to automatically supplement argon to the cooling reactor 11, and when the pressure reaches the upper limit of 0.05Mpa, the cooling argon filling valve 22 is automatically closed, and the pressure supplement is stopped;
c2, setting the opening time of the indirect water valve 23 and the direct water valve 24 by the control computer 26 during cooling, automatically introducing water to cool the reactor 11, using indirect water for cooling within 1-20 hours, opening the indirect water valve 23, using direct water for cooling within 20-60 hours, opening the direct water valve 24, automatically opening the water drain valve 25 after cooling, and automatically closing the water inlet valve 15 to finish the cooling process.
Claims (10)
1. The control method of the DCS system for producing the titanium sponge is characterized by comprising a horizontal tank (1), a reactor (11) and a control computer (26), wherein a head tank (4) is installed on the right side of the horizontal tank (1) through a pipeline, a material-beating pump (2) and a material-beating valve (3) are sequentially installed between the horizontal tank (1) and the head tank (4), an automatic feeding system (6) is connected to one side of the head tank (4) through a pipeline, a feeding valve (5) is installed between the head tank (4) and the automatic feeding system (6), the reactor (11) is installed on one side of the automatic feeding system (6) through a pipeline, a feeding valve (7) is installed between the automatic feeding system (6) and the reactor (11), a reduction thermocouple (8) and a cooling fan (9) are arranged on the left side of the reactor (11) in a reduction stage, and an air inlet valve (10) is arranged between the cooling fan (9) and the reactor (11) and used for reducing the reactor (11) at the right side thereof with a pressure transmitter (12), and the control computer (26) is electrically connected with one end of the material-pumping pump (2).
2. The control method of the DCS system for producing the sponge titanium according to claim 1, wherein one side of the reactor (11) used in the distillation stage is provided with a cold-end reactor (14) through a pipeline, the outer side of the cold-end reactor (14) is respectively provided with a water outlet valve (13) and a water inlet valve (15), the left side of the reactor (11) used in the distillation stage is provided with a distillation thermocouple (16) and an automatic passageway cleaning device (17), the right side of the reactor (11) used in the distillation stage is provided with a master control valve (18), and one side of the master control valve (18) is provided with a vacuum unit (20) through a branch control valve (19).
3. The method for controlling the DCS system for producing the sponge titanium according to claim 1, wherein one side of the reactor (11) for the cooling stage is provided with an automatic argon flushing system (21) through a pipeline, a cooling argon filling valve (22) is arranged between the automatic argon flushing system (21) and the reactor (11), the left side of the reactor (11) for the cooling stage is provided with a water drain valve (25), and the right side of the reactor (11) for the cooling stage is respectively provided with an indirect water valve (23) and a direct water valve (24).
4. A control method of a titanium sponge production DCS system as claimed in any one of claims 1-3, characterized in that it comprises the following phases:
A. a reduction stage;
B. a distillation stage;
C. and (5) a cooling stage.
5. The control method of DCS for producing sponge titanium according to claim 4, wherein said A and reduction stages comprise the following steps:
a1, in a reduction process, automatically transmitting the liquid level in the head tank (4) to a control computer (26), and when the head tank (4) needs to be supplemented with raw materials, automatically opening a material-stirring pump (2) and a material-stirring valve (3) by an operator through the control computer (26) to supplement the raw materials from the horizontal tank (1) to the head tank (4);
a2, transferring the raw materials in the head tank (4) to an automatic feeding system (6) through a feeding valve (5), and feeding the raw materials into a reactor (11) through a feeding valve (7) by the automatic feeding system (6); before reduction charging, the material speed of each reduction stage is input through a control computer (26), the automatic charging system (6) is normally operated after charging is started, the automatic charging system (6) can accumulate the total charging amount, display the current material speed, automatically close a charging valve (7) when each reduction stage is finished, and perform the next-stage charging after magnesium chloride is discharged;
a3 and a reduction thermocouple (8) can measure the temperature of each section of the reactor (11) and automatically feed back the temperature to the over-control computer (26), when the reduction temperature is higher than a set upper limit, a cooling fan (9) and an air inlet valve (10) are automatically started to cool the reactor (11), the frequency of the cooling fan (9) is automatically adjusted along with the temperature reduction, and when the temperature reaches a lower limit, the air inlet valve (10) is automatically closed; the pressure in the reduction process reactor (11) can be transmitted to a control computer (26) by means of a pressure transmitter (12), and can be automatically vented when the pressure is above an upper limit.
6. The control method of DCS system for producing sponge titanium according to claim 4, wherein said B and distillation stages comprises the following steps:
b1, in the distillation process, volatile matters are transferred from the reactor (11) to the cold-end reactor (14), the cold-end reactor (14) is provided with an automatic water inlet valve (15) and a water outlet valve (13), and when the water level of the cold-end reactor (14) needs to be raised or lowered, the water inlet valve (15) can be automatically opened through a control computer (26), and the opening angle of the water outlet valve (13) is automatically adjusted;
b2, the time and temperature required by each stage of distillation can be input through a control computer (26), and the distillation thermocouple (16) can feed back the current temperature data in real time; the vacuum pumps required by each distillation stage can be input through a control computer (26), the vacuum unit (20), the main control valve (18) and the sub-control valves (19) can automatically switch the vacuum pumps according to set time, and the vacuum pumps and the corresponding control valves are automatically switched after the time comes;
b3, inputting the cleaning interval time of the automatic aisle cleaning device (17) through the control computer (26) during distillation, and automatically cleaning the aisle by the automatic aisle cleaning device (17) to ensure the distillation process to be smoothly carried out.
7. The control method of the DCS for producing the titanium sponge according to claim 4, wherein the C and cooling stages comprise the following specific steps:
c1, in the cooling process, when the pressure in the reactor (11) is lower than the lower limit, the argon is automatically supplemented to the cooling reactor (11) by the automatic argon filling system (21), and when the pressure reaches the upper limit, the cooling argon filling valve (22) is automatically closed, and the pressure supplementation is stopped;
c2, setting the opening time of the indirect water valve (23) and the direct water valve (24) by the control computer (26) during the cooling period, automatically introducing water to cool the reactor (11), automatically opening the water drain valve (25) after the cooling is finished, automatically closing the water inlet valve (15) and finishing the cooling process.
8. The DCS control method for producing sponge titanium for the production process as claimed in claim 5, wherein the reduction stage is performed by setting the tank pressure range of 0.005-0.025MPa, the pipe pressure range of 0.25-0.05MPa and the reduction observation point temperature range of 750-850 ℃ in the reactor (11) with the control computer (26).
9. The control method of DCS for producing sponge titanium as claimed in claim 6, wherein the temperature of each section of the reactor (11) is set to 950-.
10. The DCS control method for producing sponge titanium according to claim 7, wherein the cooling stage is performed by setting the pressure in the reactor (11) to 0.03-0.05MPa through the control computer (26).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821069A (en) * | 2022-12-07 | 2023-03-21 | 云南国钛金属股份有限公司 | Rotor-grade titanium sponge inverted-U-shaped distillation process temperature control method |
| WO2024098702A1 (en) * | 2022-11-10 | 2024-05-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Process parameter accurate control system for titanium sponge reduction process, and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098702A1 (en) * | 2022-11-10 | 2024-05-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Process parameter accurate control system for titanium sponge reduction process, and control method |
| CN115821069A (en) * | 2022-12-07 | 2023-03-21 | 云南国钛金属股份有限公司 | Rotor-grade titanium sponge inverted-U-shaped distillation process temperature control method |
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