CN209044360U - A kind of control system for gas dehydration - Google Patents
A kind of control system for gas dehydration Download PDFInfo
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- CN209044360U CN209044360U CN201821942409.5U CN201821942409U CN209044360U CN 209044360 U CN209044360 U CN 209044360U CN 201821942409 U CN201821942409 U CN 201821942409U CN 209044360 U CN209044360 U CN 209044360U
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Abstract
The utility model discloses a kind of control systems for gas dehydration, comprising: PLC controller, HMI device, signal pickup assembly and multiple valves；PLC controller respectively with HMI device and signal pickup assembly communication connection；The liquid level signal of coalescing separator, the liquid level signal of flash tank, the temperature signal of reboiler, the pressure signal on absorption tower and temperature signal are transmitted to PLC controller by signal pickup assembly；The signal is transmitted to HMI device by PLC controller；HMI device includes processor, display device, warning device and man-machine interface；The signal that the processor is used to transmit the PLC controller judges, if the signal is more than its corresponding threshold value, processor controls warning device alarm, and warning message is shown by display device, while the signal for controlling corresponding valve opening or closing is transmitted to PLC controller；The signal that PLC controller is opened or closed according to the control valve that HMI device transmits, control valve open or close, and reduce operation complexity with this, mention high control precision.
Description
Technical field
The utility model relates to natual gas dehydrate units, and in particular to a kind of control system for gas dehydration.
Background technique
During natural gas transportation, natural gas must carry out effectively dehydration before entering gas pipeline, because
For water vapour can be precipitated from natural gas when pressure and temperature changes in gas pipeline, forms liquid water and be gathered in gas transmission
Pipeline lower, can reduce effective conveying section of gas pipeline, increase transporting resistance, increase power consumption, and it is serious when meeting
Block valve and gas pipeline influence steady steam supply.
It in the process of dehydration, is controlled respectively valve by multiple control device automatic or manuals,
It is not only complicated for operation, and control precision is lower, can not achieve the centralized control to dehydration sled system.
Utility model content
The purpose of the utility model is to overcome the above-mentioned deficiencies in the presence of the prior art, provide a kind of for natural gas
The control system of dehydration.
In order to realize above-mentioned purpose of utility model, the utility model provides following technical scheme:
A kind of control system of gas dehydration, comprising: PLC controller, HMI device, signal pickup assembly and multiple valves
Door；The PLC controller respectively with the HMI device and the signal pickup assembly communication connection.
The signal pickup assembly is for acquiring the liquid level signal of coalescing separator, the liquid level signal of flash tank, reboiler
Temperature signal, absorption tower pressure signal and temperature signal, and by the liquid level signal of the coalescing separator, the flash tank
Liquid level signal, the temperature signal of the reboiler, the pressure signal on the absorption tower and temperature signal be transmitted to PLC control
Device processed.
The PLC controller is by the liquid level signal of the coalescing separator, the liquid level signal of the flash tank, the reboiling
The temperature signal of device, the pressure signal on the absorption tower and temperature signal are transmitted to the HMI device.
The HMI device includes processor, display device, warning device and man-machine interface；The man-machine interface is for setting
Set collection the level threshold of coalescing separator, the level threshold of flash tank, the temperature threshold of reboiler, absorption tower pressure threshold and
Temperature threshold.
The processor is by the liquid level signal of the coalescing separator, the liquid level signal of the flash tank, the reboiler
Temperature signal, the absorption tower pressure signal and its corresponding threshold value of temperature signal be compared, if either signal is super
Its corresponding threshold value out, then the processor generates an alarm signal, and the processor controls institute by the alarm signal
State warning device alarm；Also, the processor shows warning message by the display device.
Meanwhile the signal for controlling corresponding valve opening or closing is transmitted to the PLC controller by the processor；Institute
PLC controller is stated according to the HMI device control valve opening transmitted or the signal of closing, controls the valve opening
Or it closes.
Preferably, coupled between the HMI device and the PLC controller by DP communication modes.
Preferably, the display device is used to show the liquid level of the liquid level signal of the coalescing separator, the flash tank
Signal, the temperature signal of the reboiler, the absorption tower pressure signal and temperature signal.
Preferably, the display device is liquid crystal touch screen.
Preferably, the warning device is combined aural and visual alarm.
Preferably, the man-machine interface is liquid crystal touch screen.
Preferably, the signal pickup assembly includes first pressure transmitter, second pressure transmitter, the first temperature pick-up
Device, second temperature transmitter, the first side dress band teletransmission magnetic rotary column liquidometer, the first differential pressure transmitter；Wherein, the first pressure
Transmitter is used to detect the admission pressure on the absorption tower, and the second pressure transmitter detects the air pressure out on the absorption tower
Power, first differential pressure transmitter detect the absorption tower differential pressure, and first temperature transmitter is for detecting absorption tower
Intake air temperature, the second temperature transmitter is for detecting lean solution inlet temperature of stabilizer, the first side dress band teletransmission magnetic rotary column liquid level
Count the liquid level for detecting the coalescing separator.
The signal pickup assembly further includes third pressure transmitter, the 4th pressure transmitter, third temperature transmitter,
Four temperature transmitters, double flanges differential pressure transmitter, flame detector；The third pressure transmitter is used to detect the pressure of fuel gas
Power, the 4th pressure transmitter are used to detect the pressure of the flash tank, and the third temperature transmitter is described for detecting
The temperature of reboiler, the 4th temperature transmitter are used for detecting rectifying column tower top temperature, the double flanges differential pressure transmitter
In the liquid level for detecting the flash tank；The flame detector is used to detect the flame of female fire and main fire.
Preferably, the valve includes coalescing separator tapping valve, flash tank Liquid level adjusting valve, reboiler temperature control adjusting
Valve, fuel gas quick action emergency valve, igniter solenoid valve.
Preferably, the fiery black out signal of mother that the PLC controller is transmitted according to the flame detector, controls the fuel
Gas quick action emergency valve, the coalescing separator tapping valve, the flash tank Liquid level adjusting valve and the reboiler temperature control adjusting valve
It closes.
Compared with prior art, the utility model has the beneficial effects that
1. the liquid level signal of coalescing separator acquired by signal pickup assembly, the liquid level signal of flash tank, reboiler
Temperature signal, absorption tower pressure signal and temperature signal, can make PLC controller quickly, it is accurate, obtain in real time it is each
The run signal of equipment issues accurately control instruction convenient for HMI device.
2.HMI device can quickly recognize abort situation, easy to repair and row by display device display alarm information
Except failure.
3. in the utility model, passing through the control with PLC controller, HMI device, signal pickup assembly and multiple valves
System carries out concentrated collection and processing, energy to coalescing separator, absorption tower, flash tank, the temperature of reboiler or liquid level signal
Operation complexity is enough reduced, high control precision is mentioned.
Detailed description of the invention
Fig. 1 is a kind of control system module map for gas dehydration.
Fig. 2 is a kind of signal pickup assembly connection figure of control system for gas dehydration.
Specific embodiment
The utility model is described in further detail below with reference to test example and specific embodiment.But it should not be by this
The range for being interpreted as the above-mentioned theme of the utility model is only limitted to embodiment below, all to be realized based on the content of the present invention
Technology belongs to the scope of the utility model.
Embodiment 1
The utility model, a kind of control system for gas dehydration, as shown in Figure 1, comprising: PLC controller, HMI
Device, signal pickup assembly and multiple valves；PLC controller respectively with HMI device and signal pickup assembly communication connection.
Signal pickup assembly is used to acquire the temperature of the liquid level signal of coalescing separator, the liquid level signal of flash tank, reboiler
Spend signal, absorption tower pressure signal and temperature signal, and by the liquid level signal of coalescing separator, flash tank liquid level signal,
The temperature signal of reboiler, the pressure signal on absorption tower and temperature signal are transmitted to PLC controller.
PLC controller by the liquid level signal of coalescing separator, the liquid level signal of flash tank, reboiler temperature signal, inhale
The pressure signal and temperature signal for receiving tower are transmitted to HMI device.
HMI device includes processor, display device, warning device and man-machine interface；Man-machine interface is for being arranged collection coalescence
The level threshold of separator, the level threshold of flash tank, the temperature threshold of reboiler, absorption tower pressure threshold and temperature threshold
Value；Processor by the liquid level signal of coalescing separator, the liquid level signal of flash tank, the temperature signal of reboiler, absorption tower pressure
Force signal and its corresponding threshold value of temperature signal are compared, if either signal exceeds its corresponding threshold value, processor is produced
A raw alarm signal, processor control warning device by alarm signal and alarm；Also, processor leads to warning message
Display device is crossed to show.
Meanwhile the signal for controlling corresponding valve opening or closing is transmitted to the PLC controller by processor；PLC control
The signal that device processed is opened or closed according to the control valve that the HMI device transmits, control valve open or close.
Wherein, the reason of warning message includes the position of alarm, the title of equipment, generation failure etc..
In specific implementation process, coupled between HMI device and the PLC controller by DP communication modes.
Display device is used to show the temperature letter of the liquid level signal of coalescing separator, the liquid level signal of flash tank, reboiler
Number, the pressure signal and temperature signal on absorption tower.
Also, display device and man-machine interface are liquid crystal touch screen, and warning device is combined aural and visual alarm.
As shown in Fig. 2, signal pickup assembly includes first pressure transmitter, second pressure transmitter, the first temperature pick-up
Device, second temperature transmitter, the first side dress band teletransmission magnetic rotary column liquidometer, the first differential pressure transmitter；Wherein, first pressure pick-up
Device is used to detect the admission pressure on absorption tower, and second pressure transmitter detects the outlet pressure on the absorption tower, the first differential pressure
Transmitter detection absorption tower differential pressure, the first temperature transmitter are used to detect the intake air temperature on absorption tower, second temperature transmitter
For detecting lean solution inlet temperature of stabilizer, the first side dress is used to detect the liquid level of coalescing separator with teletransmission magnetic rotary column liquidometer.
Signal pickup assembly further includes third pressure transmitter, the 4th pressure transmitter, third temperature transmitter, the 4th temperature
Spend transmitter, double flanges differential pressure transmitter, flame detector；Third pressure transmitter is used to detect the pressure of fuel gas, and the 4th
Pressure transmitter is used to detect the pressure of flash tank, and third temperature transmitter is used to detect the temperature of reboiler, and the 4th temperature becomes
Device is sent to be used to detect the liquid level of flash tank for detecting rectifying column tower top temperature, double flanges differential pressure transmitter；Flame detector is used
In the flame of detection female fire and main fire.
Valve includes that coalescing separator tapping valve, flash tank Liquid level adjusting valve, reboiler temperature control adjusting valve, fuel gas are urgent
Stop valve, igniter solenoid valve.
For example, coalescing separator tapping valve is in automatic mode, its constant opening degree is set to exist by proportion adjustment control
250mm.Flash tank Liquid level adjusting valve is normally-closed pneumatic regulating valve, in automatic mode, makes its aperture by proportion adjustment control
It is constant in 900mm.Reboiler temperature control adjusting valve is normally-closed pneumatic regulating valve, and setting reboiler controls temperature, default value 200
DEG C, than regulating and controlling reboiler temperature control adjusting valve processed.Fuel gas quick action emergency valve is electrical ball valve in remote emergency shutdown, blowing out, mother
It is closed when fiery unexpected extinguishing.Igniter solenoid valve, under automatic mode, in system without overpressure alarm, fuel gas low pressure alarming, reboiler
Start when no low liquid level warning, the retention time started every time is 5 seconds by operation, system initial value is preset, and is become than igniting
Depressor, which lags 2 seconds, to be started.Such as system does not detect flame after the completion of the starting time, then closes immediately.After the completion of the starting time
Such as system detection to flame, then closed by setting time delays (system initial value is 60 seconds).Into before delay timing, boundary is operated
Bypass valve is opened in face prompt.Guard time is by setting after loss of ignition (system initial value is 12 seconds).Ignition transformer is each
The retention time of starting is 7 seconds by operation, system initial value is preset, and is started than igniter solenoid valve first 2 seconds.
For example, in automatic ignition starting, control system fault-free and alarm, as absorption tower admission pressure is high, absorption tower
Outlet pressure is high, flash tank pressure is high, surge tank liquid level is low etc., and checks that bypass valve is in close state, will button box on the spot
Knob switching<automatic>state.Pressing button box<starting ignition>button, system on the spot will automatically turn on gas cut off valve.Combustion gas
Inlet open in place after, system will first open ignition transformer, and delay 2S opens igniter solenoid valve, and igniting transformation is closed after 7S
Device；Whether detection igniting succeeds after 12S, and opening combustion gas bypass valve is prompted to close igniting electromagnetism after 60S if lighting a fire successfully
Valve does not open combustion gas bypass valve flame for automatic distinguishing manually such as in 60S, and system will test flame-out alarm and close combustion gas
Stop valve；Flame-out alarm is shown if loss of ignition, and closes gas cut off valve, and bypass valve is turned off manually.Complete igniting
After step, system adjusts flash tank Liquid level adjusting valve, reboiler temperature control adjusting valve, coalescing separator automatically according to set value calculation
The aperture of tapping valve will be in full off state when system is in blowing out, that is, fray-out of flame.
Under manual mode, check that main fiery manually-operated gate and bypass valve are in close state.It will cut button box knob on the spot
Change state<manually>.Button box<gas cut off valve opening>button on the spot is pressed, after gas cut off valve reaches position.Press on the spot by
Button case<starting ignition>button presses button box on the spot after 10S and<stops igniting>button, and open bypass valve in 10S.It sees
Examine pilot flame whether normal signal, if pilot flame is normal, slow manually opened main fiery manually-operated gate.If abnormal
Button box<gas cut off valve closing>button on the spot or<emergency stop>button are pressed, and bypass valve is turned off manually.
Note: manual mode in debugging or unconventional situation only for using, and system is in without any protection shape under the mode
State.Flash tank Liquid level adjusting valve, reboiler temperature control adjusting valve, coalescing separator tapping valve are in full off state.
Flash tank Liquid level adjusting valve and reboiler temperature control adjusting valve are normally-closed pneumatic regulating valve.
The fiery black out signal of mother that flame detector transmits is transmitted to HMI device by PLC controller, and HMI device will close system combustion
Expect the signal transmission of gas quick action emergency valve, coalescing separator tapping valve, flash tank Liquid level adjusting valve and reboiler temperature control adjusting valve
To PLC controller, PLC controller controls fuel gas quick action emergency valve, coalescing separator tapping valve, flash tank liquid level according to closing
Fuel gas quick action emergency valve, coalescing separator tapping valve, flash distillation are closed in the signal of regulating valve and reboiler temperature control adjusting valve, control
The signal of tank Liquid level adjusting valve and reboiler temperature control adjusting valve.
PLC controller is Siemens S7300 programmable controller, further includes distributor breaker, switch electricity in PLC system
Source, intermediate relay and Surge Protector.
Claims (9)
1. a kind of control system for gas dehydration characterized by comprising PLC controller, HMI device, signal acquisition
Device and multiple valves；The PLC controller respectively with the HMI device and the signal pickup assembly communication connection；
The signal pickup assembly is used to acquire the temperature of the liquid level signal of coalescing separator, the liquid level signal of flash tank, reboiler
The pressure signal and temperature signal of signal, absorption tower are spent, and by the liquid level signal of the coalescing separator, the liquid of the flash tank
Position signal, the temperature signal of the reboiler, the pressure signal on the absorption tower and temperature signal are transmitted to the PLC control
Device；
The PLC controller is by the liquid level signal of the coalescing separator, the liquid level signal of the flash tank, the reboiler
Temperature signal, the pressure signal on the absorption tower and temperature signal are transmitted to the HMI device；
The HMI device includes processor, display device, warning device and man-machine interface；The man-machine interface is for being arranged collection
The level threshold of coalescing separator, the level threshold of flash tank, the temperature threshold of reboiler, absorption tower pressure threshold and temperature
Threshold value；
The processor is by the temperature of the liquid level signal of the coalescing separator, the liquid level signal of the flash tank, the reboiler
Degree signal, the pressure signal on the absorption tower and its corresponding threshold value of temperature signal are compared, if either signal exceeds it
Corresponding threshold value, then the processor generates an alarm signal, and the processor controls the report by the alarm signal
Alarm device alarm；Also, the processor shows warning message by the display device；
Meanwhile the signal for controlling corresponding valve opening or closing is transmitted to the PLC controller by the processor；It is described
PLC controller according to the HMI device control valve opening transmitted or the signal of closing, control the valve opening or
It closes.
2. a kind of control system for gas dehydration according to claim 1, which is characterized in that the HMI device
Coupled between the PLC controller by DP communication modes.
3. a kind of control system for gas dehydration according to claim 1, which is characterized in that the display device
For showing the liquid level signal of the coalescing separator, the liquid level signal of the flash tank, the temperature signal of the reboiler, institute
State the pressure signal and temperature signal on absorption tower.
4. a kind of control system for gas dehydration according to claim 1 or 3, which is characterized in that the display
Device is liquid crystal touch screen.
5. a kind of control system for gas dehydration according to claim 1, which is characterized in that the warning device
For combined aural and visual alarm.
6. a kind of control system for gas dehydration according to claim 1, which is characterized in that the man-machine interface
For liquid crystal touch screen.
7. a kind of control system for gas dehydration according to claim 1, which is characterized in that the signal acquisition
Device includes first pressure transmitter, second pressure transmitter, the first temperature transmitter, second temperature transmitter, the first side dress
Band teletransmission magnetic rotary column liquidometer, the first differential pressure transmitter；Wherein, the first pressure transmitter is for detecting the absorption tower
Admission pressure, the second pressure transmitter detect the outlet pressure on the absorption tower, the first differential pressure transmitter inspection
The absorption tower differential pressure is surveyed, first temperature transmitter is used to detect the intake air temperature on absorption tower, the second temperature pick-up
Device is for detecting lean solution inlet temperature of stabilizer, and the first side dress is with teletransmission magnetic rotary column liquidometer for detecting the coalescing separator
Liquid level；
The signal pickup assembly further includes third pressure transmitter, the 4th pressure transmitter, third temperature transmitter, the 4th temperature
Spend transmitter, double flanges differential pressure transmitter, flame detector；The third pressure transmitter is used to detect the pressure of fuel gas,
4th pressure transmitter is used to detect the pressure of the flash tank, and the third temperature transmitter is for detecting the reboiling
The temperature of device, the 4th temperature transmitter is for detecting rectifying column tower top temperature, and the double flanges differential pressure transmitter is for examining
Survey the liquid level of the flash tank；The flame detector is used to detect the flame of female fire and main fire.
8. a kind of control system for gas dehydration according to claim 7, which is characterized in that the valve includes
Coalescing separator tapping valve, flash tank Liquid level adjusting valve, reboiler temperature control adjusting valve, fuel gas quick action emergency valve, igniting electromagnetism
Valve.
9. a kind of control system for gas dehydration according to claim 8, which is characterized in that the PLC control
Device controls the fuel gas quick action emergency valve, the coarse separation according to the fiery black out signal of mother that the flame detector transmits
Device tapping valve, the flash tank Liquid level adjusting valve and the reboiler temperature control adjusting valve are closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821942409.5U CN209044360U (en) | 2018-11-23 | 2018-11-23 | A kind of control system for gas dehydration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821942409.5U CN209044360U (en) | 2018-11-23 | 2018-11-23 | A kind of control system for gas dehydration |
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| CN209044360U true CN209044360U (en) | 2019-06-28 |
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| CN201821942409.5U Active CN209044360U (en) | 2018-11-23 | 2018-11-23 | A kind of control system for gas dehydration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091817A (en) * | 2021-04-06 | 2021-07-09 | 重庆大学 | Triethylene glycol dewatering device state monitoring and fault diagnosis system |
-
2018
- 2018-11-23 CN CN201821942409.5U patent/CN209044360U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091817A (en) * | 2021-04-06 | 2021-07-09 | 重庆大学 | Triethylene glycol dewatering device state monitoring and fault diagnosis system |
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