CN104615168B - Liquid chlorine gasification device pressure automatic control system - Google Patents
Liquid chlorine gasification device pressure automatic control system Download PDFInfo
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- CN104615168B CN104615168B CN201410721887.3A CN201410721887A CN104615168B CN 104615168 B CN104615168 B CN 104615168B CN 201410721887 A CN201410721887 A CN 201410721887A CN 104615168 B CN104615168 B CN 104615168B
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Abstract
The present invention relates to technical field of metallurgical production, discloses a kind of liquid chlorine gasification device pressure automatic control system.It includes liquid chlorine gasification device, Liquid chlorine pipeline, chlorine conveying pipelines, steam conveying pipe, liquid chlorine stop valve is sequentially provided with Liquid chlorine pipeline, liquid chlorine regulating valve, chlorine conveying pipelines are provided with chlorine gas pressure sensor, steam conveying pipe is provided with steam pressure sensor, the pressure signal for detecting is transferred to main frame by chlorine gas pressure sensor, main frame sends valve opening control signal to liquid chlorine regulating valve, the aperture of control liquid chlorine regulating valve, steam pressure sensor is by the steam pressure signal transmission for detecting to main frame, main frame sends liquid chlorine stop valve folding control signal, the folding of control liquid chlorine stop valve.The present invention has the function that chlorine gas pressure on-line checking, pressure are automatically adjusted, and is capable of achieving liquid chlorine gasification device automatic protection in steam decompression or low pressure, and a key cuts off the input of liquid chlorine, improves the security performance of production equipment.
Description
Technical field
The present invention relates to technical field of metallurgical production, specifically a kind of liquid chlorine gasification device in hydrometallurgy production
Pressure automatic control system.
Background technology
Chlorine gas pressure control system is converted to through heating by liquid for chlorine in non-ferrous metal hydrometallurgical processes
Gaseous control device.The current conventional mode someone's work control mode that can realize chlorine gas pressure control, PID regulator control
The modes such as system, manually operated mode mainly realize the control of chlorine gas pressure, this side using gaseous chlorine valve opening
There is labor intensity of operating staff greatly in formula, safety is not high, control accuracy is low, chlorine gas pressure can not realize control in time when fluctuating
System；Although PID regulator control can be automatically controlled to chlorine gas pressure, as system is present than larger in control process
Hysteresis quality, build-up of pressure parameter is not easy to adjust, the not high technological deficiency of transit time length, control accuracy.Above-mentioned control method
During liquid chlorine vaporizing when steam decompression or no pressure, the efficiency of gasification and of low quality is susceptible to liquid chlorine
Into in gaseous state pipeline, the damage of the unstable and equipment of technique is caused, while there is the potential safety hazard of personal injury, safety
Can not be high；When there is gaseous state chlorine gas leakage and when needing to stop in emergency, control system cannot fast shut-off automatically, control is too late
When, there is potential safety hazard.
The content of the invention
It is an object of the invention to provide a kind of liquid chlorine gasification device pressure automatic control system, can be according to detected liquid
Pressure size in chlorine gasification equipment pipeline, using FUZZY ALGORITHMS FOR CONTROL, controls liquid chlorine flowrate, stable chlorine gas pressure, tool
There are plant characteristic automatic identification, the function of heating steam decompression automatic protection.
To achieve these goals, the technical solution used in the present invention is：
A kind of liquid chlorine gasification device pressure automatic control system, it includes liquid chlorine gasification device with liquid chlorine gasification device phase
The Liquid chlorine pipeline of connection, chlorine conveying pipelines, steam conveying pipe, are sequentially provided with liquid chlorine on the Liquid chlorine pipeline and cut
Disconnected valve, liquid chlorine regulating valve, the liquid chlorine stop valve are connected with the terminal board in main control box by the second control cable,
The terminal board is connected with main frame, and the main frame sends valve folding control signal to the liquid chlorine stop valve, control
The folding of the liquid chlorine stop valve；The liquid chlorine regulating valve is connected with the terminal board by the first control cable, institute
State main frame and valve opening control signal is sent to the liquid chlorine regulating valve, control the aperture of the liquid chlorine regulating valve；The steam
Conveyance conduit is provided with steam pressure sensor, the outfan of the steam pressure sensor by secondary shielding cable with it is described
Terminal board is connected, and detected steam pressure signal transmission is given the main frame, institute by the steam pressure sensor
Main frame is stated according to the steam pressure signal for being received, output valve folding control signal；The chlorine conveying pipelines are provided with chlorine
Air pressure force transducer, the outfan of the chlorine gas pressure sensor are connected with the terminal board by the first shielded cable
Connect, detected chlorine gas pressure signal transmission is given the main frame by the chlorine gas pressure sensor, the main frame is according to being connect
The chlorine gas pressure signal of receipts is through fuzzy operation output valve opening control signal.
As a further improvement on the present invention, it is provided with the terminal board, main frame, power supply to open in the main control box
Pass, DC power supplier, touch-screen display, solid-state relay, the input of the DC power supplier pass through on and off switch
It is connected with alternating current power supply, the outfan of the DC power supplier is connected with the main frame, the main frame and the touch
Display screen is connected, and the main frame is also connected with the second control cable by solid-state relay, the solid-state relay and institute
State alternating current power supply to be connected, the DC power supplier by alternating current be converted to unidirectional current for the main frame in main control box,
Touch display screen provides DC source.
Used as the further improvement of the present invention, the chlorine gas pressure sensor is diaphragm type sensor, and diaphragm material is
Hastelloy.
As the further improvement of the present invention, the material in the liquid chlorine regulating valve, liquid chlorine stop valve with liquid chlorine contact surface
Expect for PTFE material.
The present invention operation principle be：Liquid chlorine is gasified into liquid chlorine gasification device by Liquid chlorine pipeline, by liquid
State chlorine is exported from chlorine conveying pipelines after being changed into gaseous state chlorine, and chlorine gas pressure sensor, chlorine are provided with chlorine conveying pipelines
The pressure signal for detecting is converted to 4-20mA master meter signals by air pressure force transducer, is transferred to by the first shielded cable
Input signal is converted to and show in touch display screen after chlorine gas pressure value by main frame, main frame, and main frame is measured according to chlorine gas pressure
Difference between value and system threshold value set in advance, exports the valve opening control signal of 4-20mA, valve through fuzzy operation
Door opening control signal shows in touch display screen, while valve opening control signal controls cable transmission to described by first
Liquid chlorine regulating valve, realizes the control of liquid chlorine regulating valve valve opening, reaches the function of stable chlorine gas pressure；On steam conveying pipe
Steam pressure sensor is provided with, the steam pressure for detecting is converted to 4-20mA master meters letter by the steam pressure sensor
Number, by secondary shielding cable transmission to main frame, input signal is converted to vapour pressure force value by main frame, is shown in touch display screen
Show, main frame is compared according to steam pressure measured value and system steam pressure threshold value set in advance, when steam pressure is less than
During set steam pressure threshold value, main frame sends the control signal for opening liquid chlorine stop valve, and liquid chlorine stop valve disconnects, liquified chlorine gas
Makeup is put and interior will no longer be input into liquid chlorine；When steam pressure is higher than set steam pressure threshold value, main frame sends closure liquid chlorine
The control signal of stop valve, liquid chlorine stop valve closure, will be input into liquid chlorine in liquid chlorine gasification device, realize because in steam conveying pipe
Insufficient pressure or pressure-less state liquid chlorine gasification device automatic protection.
Beneficial effects of the present invention are：
（1）By the use of the present invention so that liquid chlorine gasification device is while with chlorine gas pressure on-line checking function
The function of also automatically adjust with pressure, controlling；
（2）Fuzzy type pid control module is employed in this control system, during solving traditional PID control parameter is not
Easily adjust, the defect of transit time length；
（3）The present invention has the automatic of the liquid chlorine gasification device of insufficient pressure or pressure-less state in steam conveying pipe
Defencive function, when solving in production process due to steam decompression or not enough steam pressure, it is defeated that liquid chlorine enters gaseous state chlorine
Pipeline is sent, the defect that liquid chlorine vaporizing is of low quality is caused, the security performance of production equipment is improve；
（4）When breaking down in production, the emergency stop push button on main frame touch screen can be passed through, main frame sends opening liquid
The control signal of chlorine stop valve, liquid chlorine stop valve disconnect, and will no longer be input into liquid chlorine, and realize stopping in emergency in liquid chlorine gasification device,
One key cuts off chlorine, prevents the generation of security incident；
（5）Instrument in main control box of the present invention adopts modular construction, installs manufacture simplicity, and fault rate is low, maintenance side
Just.
Description of the drawings
Fig. 1 is the system construction drawing of the present invention；
Fig. 2 is the arrangement wiring diagram in Fig. 1 in main control box；
In figure：1st, Liquid chlorine pipeline, 2, liquid chlorine stop valve, 3, liquid chlorine regulating valve, 4, liquid chlorine gasification device, 5, chlorine it is defeated
Send pipeline, 6, steam conveying pipe, 7, steam pressure sensor, 8, chlorine gas pressure sensor, the 9, first shielded cable, 10,
Two shielded cables, the 11, first control cable, the 12, second control cable, 13, alternating current power supply, 14, cable seal head, 15, master control
Case processed, 16, terminal board, 17, on and off switch, 18, solid-state relay, 19, DC power supplier, 20, touch display screen,
21st, main frame.
Specific embodiment
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
A kind of liquid chlorine gasification device pressure automatic control system as shown in Figure 1 and Figure 2, it include liquid chlorine gasification device 4,
The Liquid chlorine pipeline 1 that is connected with liquid chlorine gasification device 4, chlorine conveying pipelines 5, steam conveying pipe 6, Liquid chlorine pipeline
Liquid chlorine stop valve 2, liquid chlorine regulating valve 3 are sequentially provided with 1, liquid chlorine stop valve 2 is by the second control cable 12 and main control box 15
Interior terminal board 16 is connected, and terminal board 16 is connected with main frame 21, and main frame 21 sends valve to liquid chlorine stop valve 2
Folding control signal, controls the folding of liquid chlorine stop valve 2；Liquid chlorine regulating valve 3 is by the first control cable 11 and terminal board
16 are connected, and main frame 21 sends valve opening control signal to liquid chlorine regulating valve 3, control the aperture of liquid chlorine regulating valve 3；Steam is defeated
Pipeline 6 is sent to be provided with steam pressure sensor 7, the outfan of steam pressure sensor 7 passes through secondary shielding cable 10 and wiring
Terminal board 16 is connected, and steam pressure sensor 7 is by detected steam pressure signal transmission to main frame 21,21 basis of main frame
The steam pressure signal for being received, output valve folding control signal；Chlorine conveying pipelines 5 are provided with chlorine gas pressure sensor 8,
The outfan of chlorine gas pressure sensor 8 is connected with terminal board 16 by the first shielded cable 9, chlorine gas pressure sensor 8
By detected chlorine gas pressure signal transmission to main frame 21, main frame 21 is according to the chlorine gas pressure signal for being received through fuzzy fortune
Calculate output valve opening control signal.
Terminal board 16, main frame 21, on and off switch 17, DC power supplier 19, touch screen are provided with main control box 15
Display 20, solid-state relay 18, the input of DC power supplier 19 are connected with alternating current power supply 13 by and off switch 17,
The outfan of DC power supplier 19 is connected with main frame 21, and main frame 21 is connected with touch display screen 20, and main frame 21 also passes through
Solid-state relay 18 is connected with the second control cable 12, and solid-state relay 18 is connected with alternating current power supply 13, DC source mould
Alternating current is converted to unidirectional current and provides DC source for the main frame 21 and touch display screen 20 in main control box 15 by block 19.
Chlorine gas pressure sensor 8 is diaphragm type sensor, and diaphragm material is Hastelloy.Liquid chlorine regulating valve 3, liquid chlorine is cut off
It is PTFE material with the material of liquid chlorine contact surface in valve 2.
In actual use, liquid chlorine enters circulation of qi promoting into liquid chlorine gasification device 4 by Liquid chlorine pipeline 1 to the present invention
Change, liquid chlorine is changed into exporting from chlorine conveying pipelines 5 after gaseous state chlorine, chlorine gas pressure is installed on chlorine conveying pipelines 5
The pressure signal for detecting is converted to 4-20mA master meter signals by sensor 8, chlorine gas pressure sensor 8, by the first screen
Cover cable 9 and be transferred to main frame 21, input signal is converted to and show in touch display screen 20 after chlorine gas pressure value by main frame 21, main
Machine 21 exports 4-20mA through fuzzy operation according to the difference between chlorine gas pressure measured value and system threshold value set in advance
Valve opening control signal, valve opening control signal are shown in touch display screen 20, while valve opening control signal passes through
First control cable 11 is transferred to the liquid chlorine regulating valve 3, realizes the control of 3 valve opening of liquid chlorine regulating valve, reaches stable chlorine
The function of atmospheric pressure；Steam conveying pipe 6 is provided with steam pressure sensor 7, and steam pressure sensor 7 is by the steam for detecting
Pressure conversion is 4-20mA master meter signals, is transferred to main frame 21 by secondary shielding cable 10, and main frame 21 is by input signal
Vapour pressure force value is converted to, is shown in touch display screen 20, main frame 21 is preset according to steam pressure measured value and system
Steam pressure threshold value be compared, when steam pressure be less than set steam pressure threshold value when, main frame 21 is judged as steam
Decompression or no pressure, main frame 21 send the control signal for opening liquid chlorine stop valve 2, and liquid chlorine stop valve 2 disconnects, liquid chlorine gasification device
Liquid chlorine will be no longer input in 4；When steam pressure is higher than set steam pressure threshold value, main frame 21 is judged as steam pressure just
Often, main frame 21 sends the control signal of closure liquid chlorine stop valve 2, and liquid chlorine stop valve 2 is closed, will input in liquid chlorine gasification device 4
Liquid chlorine, realizes the automatic protection of the liquid chlorine gasification device because of insufficient pressure or pressure-less state in steam conveying pipe.Work as life
There is chlorine leakage during product or when needing to stop in emergency, operator press in touch display screen 20 stop in emergency by
Button, main frame 21 send the control signal for opening liquid chlorine stop valve 2, and liquid chlorine stop valve 2 disconnects, will no longer in liquid chlorine gasification device 4
Input liquid chlorine, realizes stopping in emergency.
Instant invention overcomes artificial control is inaccurate, PID automatically controls that parameter tuning is loaded down with trivial details, and settling time is long, when
When steam pressure decompression and no pressure, gasification result is bad, easily causes liquid chlorine and peace is caused in liquid chlorine gasification device
Full accident, in emergency circumstances using traditional control mode, the shortcomings of chlorine break time is long, is hydrometallurgy process chlorine pressure
Power control is there is provided accurately and reliably control system.
Claims (4)
1. a kind of liquid chlorine gasification device pressure automatic control system, it includes liquid chlorine gasification device（4）, and liquid chlorine gasification device
（4）The Liquid chlorine pipeline being connected（1）, chlorine conveying pipelines（5）, steam conveying pipe（6）, it is characterised in that：The liquid
Chlorine conveyance conduit（1）On be sequentially provided with liquid chlorine stop valve（2）, liquid chlorine regulating valve（3）, the liquid chlorine stop valve（2）By second
Control cable（12）With main control box（15）Interior terminal board（16）It is connected, the terminal board（16）With main frame
（21）It is connected, the main frame（21）To the liquid chlorine stop valve（2）Valve folding control signal is sent, the liquid chlorine is controlled and is cut
Disconnected valve（2）Folding；The liquid chlorine regulating valve（3）By the first control cable（11）With the terminal board（16）It is connected
Connect, the main frame（21）To the liquid chlorine regulating valve（3）Valve opening control signal is sent, the liquid chlorine regulating valve is controlled（3）
Aperture；The steam conveying pipe（6）It is provided with steam pressure sensor（7）, the steam pressure sensor（7）Output
End is by secondary shielding cable（10）With the terminal board（16）It is connected, the steam pressure sensor（7）To be examined
The steam pressure signal transmission for measuring gives the main frame（21）, the main frame（21）It is according to the steam pressure signal for being received, defeated
Go out valve folding control signal；The chlorine conveying pipelines（5）It is provided with chlorine gas pressure sensor（8）, the chlorine gas pressure biography
Sensor（8）Outfan pass through the first shielded cable（9）With the terminal board（16）It is connected, the chlorine gas pressure sensing
Device（8）The main frame is given by detected chlorine gas pressure signal transmission（21）, the main frame（21）According to the chlorine for being received
Pressure signal is through fuzzy operation output valve opening control signal.
2. liquid chlorine gasification device pressure automatic control system according to claim 1, it is characterised in that：The main control box
（15）The terminal board is provided with inside（16）, main frame（21）, on and off switch（17）, DC power supplier（19）, touch screen display
Show device（20）, solid-state relay（18）, the DC power supplier（19）Input pass through on and off switch（17）With alternating current
Source（13）It is connected, the DC power supplier（19）Outfan and the main frame（21）It is connected, the main frame（21）With
The touch display screen（20）It is connected, the main frame（21）Also pass through solid-state relay（18）With the second control cable（12）Phase
Connection, the solid-state relay（18）With the alternating current power supply（13）It is connected, the DC power supplier（19）By alternating current
Unidirectional current is converted to for main control box（15）Each interior described main frame（21）, touch display screen（20）DC source is provided.
3. liquid chlorine gasification device pressure automatic control system according to claim 1, it is characterised in that：The chlorine gas pressure
Sensor（8）For diaphragm type sensor, diaphragm material is Hastelloy.
4. liquid chlorine gasification device pressure automatic control system according to claim 1, it is characterised in that：The liquid chlorine is adjusted
Valve（3）, liquid chlorine stop valve（2）In be PTFE material with the material of liquid chlorine contact surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410721887.3A CN104615168B (en) | 2014-12-03 | 2014-12-03 | Liquid chlorine gasification device pressure automatic control system |
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| CN201410721887.3A CN104615168B (en) | 2014-12-03 | 2014-12-03 | Liquid chlorine gasification device pressure automatic control system |
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| CN104615168B true CN104615168B (en) | 2017-04-05 |
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| CN108594742A (en) * | 2018-04-25 | 2018-09-28 | 马鞍山钢铁股份有限公司 | A kind of light benzene storage tank system security controls device |
| CN111734946B (en) * | 2020-07-04 | 2022-04-05 | 南京天人环保设备有限公司 | Overpressure protector for biogas double-membrane gas storage cabinet |
| CN112095126A (en) * | 2020-10-15 | 2020-12-18 | 金川集团信息与自动化工程有限公司 | Automatic copper removing system |
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