CN106759779B - A kind of online blowdown apparatus and online method for discharging pollution applied to gas pipeline yard - Google Patents
A kind of online blowdown apparatus and online method for discharging pollution applied to gas pipeline yard Download PDFInfo
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- CN106759779B CN106759779B CN201710197569.5A CN201710197569A CN106759779B CN 106759779 B CN106759779 B CN 106759779B CN 201710197569 A CN201710197569 A CN 201710197569A CN 106759779 B CN106759779 B CN 106759779B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a kind of online blowdown apparatus applied to gas pipeline yard, comprising: an at least filter, filter lower section set an at least liquid collecting packet, and liquid collecting, which is wrapped, sets two fluid level transmitters；At least a blowdown branch, blowdown branch one end are connected with liquid collecting packet, and the blowdown branch other end is connected with header, and blowdown branch road successively sets the first safety cut-off valve, the first technique ball valve, Liquid level adjusting valve and the second technique ball valve；Blowdown drum, blowdown drum and header connect, and set a fluid level transmitter on blowdown drum；Header sets pressure transmitter and the second safety cut-off valve on header；Instrument junction box, instrument junction box and three fluid level transmitters, two safety cut-off valves, Liquid level adjusting valve and pressure transmitter connect.The present invention also provides a kind of online method for discharging pollution applied to gas pipeline yard.Beneficial effects of the present invention: guaranteeing the safety of yard operation, reduces operational risk and is beneficial to energy conservation emission reduction, can be monitored by SCADA system to it.
Description
Technical field
The present invention relates to drainage, pipe-line system and technical field of automatic control, in particular to a kind of application
In the online blowdown apparatus and online method for discharging pollution of gas pipeline yard.
Background technique
For the drainage in gas pipeline yard, traditional device is that a ball valve and one is arranged in blowdown branch road
Blowdown valve, this device can only realize offline manual blowdown, i.e., when being run when multiple branch circuit equipment difference (when having emergency bypass),
Emergency bypass is first turned on, the upstream and downstream ball valve for needing blowdown branch is closed, is then turned on emptying valve, gas pressure is put
Sky finally opens ball valve again and blowdown valve carries out blowdown to safe working pressure hereinafter, turn off emptying valve.
The shortcomings that such offline blowdown apparatus, is:
1, after emergency bypass must being enabled, just blowdown can be carried out to the equipment on present branch；
2, it is unable to control discharge pressure, is easy to damage upstream device, or even damage operations staff；
3, blowdown the degree of automation is low, and manual blowdown operating procedure is complicated, increases operations staff's workload and maloperation machine
Rate.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of online blowdown dresses applied to gas pipeline yard
It sets and online method for discharging pollution, solves the problems, such as previous process, guarantee the safety of yard operation, reduce operational risk
And it is beneficial to energy conservation emission reduction, and it can be monitored by SCADA system.
The present invention provides a kind of online blowdown apparatus applied to gas pipeline yard, which includes:
An at least filter, the filter lower section are equipped at least one liquid collecting packet, and the liquid collecting is wrapped equipped with first
Fluid level transmitter and the second fluid level transmitter；
At least blowdown branch, one end of the blowdown branch are connected with the liquid collecting packet all the way, and the blowdown branch is another
End is connected with header, and the blowdown branch is successively arranged the first safety cut-off valve, the first technique ball valve, Liquid level adjusting valve and the on the road
Two technique ball valves；
Blowdown drum, the blowdown drum are connected with the header, and the blowdown drum is equipped with third fluid level transmitter；
Header is equipped with pressure transmitter and the second safety cut-off valve close to one end of the blowdown drum on the header；
Instrument junction box, it is the instrument junction box and first fluid level transmitter, second fluid level transmitter, described
First safety cut-off valve, the Liquid level adjusting valve, the pressure transmitter, second safety cut-off valve and the third liquid level
Transmitter is connected.
As further improvement of the invention, the online blowdown apparatus includes three filters, every filter lower section
If each liquid collecting packet is connected with blowdown branch all the way, and six tunnel blowdown branches are connected with the header there are two liquid collecting packet.
As further improvement of the invention, first fluid level transmitter accesses the instrument by first instrument cable
Junction box, second fluid level transmitter access the instrument junction box, first safety cut-off by second instrument cable
Valve accesses the instrument junction box by third instrument cable, and the regulating valve accesses the instrument by the 4th instrument cable and connects
Line case, the pressure transmitter access the instrument junction box by the 5th instrument cable, and second safety cut-off valve passes through
6th instrument cable accesses the instrument junction box, and the third fluid level transmitter accesses the instrument by the 7th instrument cable
Junction box.
It being improved as of the invention further, first fluid level transmitter is connect with the Liquid level adjusting valve, and described the
Two fluid level transmitters are connect with first safety cut-off valve, and the third fluid level transmitter and second safety cut-off valve connect
It connects, the pressure transmitter is connect with second safety cut-off valve.
The present invention also provides a kind of online method for discharging pollution applied to gas pipeline yard, this method includes following step
It is rapid:
Step 1, first fluid level transmitter measures the level value of the liquid collecting packet, and first fluid level transmitter is to this
Level value is judged, when the level value is high liquid level value, opens the Liquid level adjusting valve；When the level value is low liquid level value
When, close the Liquid level adjusting valve；
Meanwhile the first level gauging signal of first fluid level transmitter is accessed into instrument junction box, by the liquid level
The adjustment signal of regulating valve accesses instrument junction box；
Step 2, second fluid level transmitter measures the level value of the liquid collecting packet, and second fluid level transmitter is to this
Level value is judged, when the level value is low liquid level value, closes first safety cut-off valve；
Meanwhile the second level gauging signal of second fluid level transmitter is accessed into the instrument junction box, it will be described
First shutoff signal of the first safety cut-off valve accesses the instrument junction box；
Step 3, the third fluid level transmitter measures the level value of the blowdown drum, and the third fluid level transmitter is to this
Level value is judged, when the level value is high liquid level value, closes second safety cut-off valve；
Meanwhile the third level gauging signal of the third fluid level transmitter is accessed into the instrument junction box, it will be described
Second shutoff signal of the second safety cut-off valve accesses the instrument junction box；
Step 4, every road blowdown branch is performed both by step 1-3；
Step 5, the pressure value of blowdown branch described in the pressure transmitter measurement, the pressure transmitter is to the pressure value
Judged, when the pressure value is high pressure values, closes second safety cut-off valve；
Meanwhile the pressure signal of the pressure transmitter is accessed into the instrument junction box, by second safety cut-off
The third shutoff signal of valve accesses the instrument junction box；
Step 6, the instrument junction box receives the first level gauging signal of every road blowdown branch road, described second
Level gauging signal, the third level gauging signal, first shutoff signal, the adjustment signal, while the instrument
Junction box receives second shutoff signal, the pressure signal and the third shutoff signal on the header, and passes through
Bus carries out data transmission to SCADA system.
It is further improved as of the invention, in step 1, when Liquid level adjusting valve failure can not close, closes institute
State the first safety cut-off valve of Liquid level adjusting valve upstream setting.
It is further improved as of the invention, in step 1, the first level gauging signal of first fluid level transmitter is logical
First instrument cable access instrument junction box is crossed, the adjustment signal of the Liquid level adjusting valve accesses instrument by the 4th instrument cable
Junction box.
It is further improved as of the invention, in step 2, the second level gauging signal of second fluid level transmitter is logical
It crosses second instrument cable and accesses the instrument junction box, the first shutoff signal of first safety cut-off valve passes through third instrument
Cable accesses the instrument junction box.
It is further improved as of the invention, in step 3, the third level gauging signal of the third fluid level transmitter is logical
It crosses the 7th instrument cable and accesses the instrument junction box, the second shutoff signal of second safety cut-off valve passes through the 6th instrument
Cable accesses the instrument junction box.
It is further improved as of the invention, in step 5, the pressure signal of the pressure transmitter is passed through into the 5th instrument
Cable accesses the instrument junction box, and the third shutoff signal of second safety cut-off valve is accessed by the 6th instrument cable
The instrument junction box.
The invention has the benefit that solving the problems, such as previous process, guarantees the safety of yard operation, subtract
Lack operational risk and be beneficial to energy conservation emission reduction, and it can be monitored by SCADA system.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the online blowdown apparatus applied to gas pipeline yard described in the embodiment of the present invention
Figure.
Fig. 2 is a kind of schematic diagram of the online blowdown process applied to gas pipeline yard described in the embodiment of the present invention.
In figure,
1, filter；2, the first fluid level transmitter；3, the second fluid level transmitter；4, third fluid level transmitter；5, blowdown branch
Road；6, the first safety cut-off valve；7, the first technique ball valve；8, Liquid level adjusting valve；9, the second technique ball valve；10, the second safety is cut
Disconnected valve；11, pressure transmitter；12, blowdown drum；13, instrument junction box；14, liquid collecting packet；15, first instrument cable；16, second
Instrument cable；17, third instrument cable；18, the 4th instrument cable；19, the 5th instrument cable；20, the 6th instrument cable；21,
7th instrument cable；22, header.
Specific embodiment
The present invention is described in further detail below by specific embodiment and in conjunction with attached drawing.
Embodiment 1, as shown in Figure 1, a kind of online blowdown apparatus applied to gas pipeline yard of the embodiment of the present invention,
The device includes three filters 1, six tunnel blowdown branches 5, header 22, instrument junction box 13 and blowdown drum 12.
It is set below every filter 1 there are two liquid collecting packet 14, altogether there are six liquid collecting packet 14, each liquid collecting packet 14 is equipped with the
One fluid level transmitter 2 and the second fluid level transmitter 3.
One end of every road blowdown branch 5 is connected with a liquid collecting packet 14, every 5 other end of road blowdown branch with 22 phase of header
Even, the first safety cut-off valve 6, the first technique ball valve 7, Liquid level adjusting valve 8 and the second technique are successively arranged on every road blowdown branch 5
Ball valve 9.
Blowdown drum 12 is connected with header 22, and blowdown drum 12 is equipped with third fluid level transmitter 4.
Pressure transmitter 11 and the second safety cut-off valve 10 are equipped with close to one end of blowdown drum 12 on header 22.
Instrument junction box 13 and the first fluid level transmitter 2, the second fluid level transmitter 3, the first safety cut-off valve 6, liquid level tune
Section valve 8, pressure transmitter 11, the second safety cut-off valve 10 are connected with third fluid level transmitter 4.
Wherein, the first fluid level transmitter 2 accesses instrument junction box 13, the second fluid level transmitter by first instrument cable 15
3 access instrument junction box 13 by second instrument cable 16, and the first safety cut-off valve 6 accesses instrument by third instrument cable 17
Junction box 13, and Liquid level adjusting valve 8 accesses instrument junction box 13 by the 4th instrument cable 18, and pressure transmitter 11 passes through the 5th instrument
Table cable 19 accesses instrument junction box 13, and the second safety cut-off valve 10 accesses instrument junction box 13 by the 6th instrument cable 20,
Third fluid level transmitter 4 accesses instrument junction box 13 by the 7th instrument cable 21.
Further, in order to guarantee the chain control to Liquid level adjusting valve 8, the first fluid level transmitter 2 is adjusted with liquid level
Valve 8 connects；In order to guarantee the chain control to the second fluid level transmitter 3 to the first safety cut-off valve 6, by the second fluid level transmitter
3 connect with the first safety cut-off valve 6；In order to guarantee that third fluid level transmitter 4, will to the chain control of the second safety cut-off valve 10
Third fluid level transmitter 4 is connect with the second safety cut-off valve 10；In order to guarantee pressure transmitter 11 to the second safety cut-off valve 10
Chain control, pressure transmitter 11 connect with the second safety cut-off valve 10.
Wherein,
The bore of the blowdown pipeline of each blowdown branch 5 is 2 cun of class600#.
Liquid level adjusting valve 8 uses axial-flow type Liquid level adjusting valve, and bore is 1 cun, should wear executing agency, and type is failure peace
Holotype, accident condition FC.The clipping room of Liquid level adjusting valve 8 and upstream the first technique ball valve 7 (truncation ball valve) is away from being not less than
600mm.In order to realize automatic blowdown function, blowdown flow velocity, and control of sewage disposal pressure is effectively reduced in the regulatory function of Liquid level adjusting valve 8
Power is below the operating pressure of blowdown drum 12.
First fluid level transmitter 2 and the second fluid level transmitter 3 are magnetostrictive liquid level transducer, and transmitter passes through side
Flange installation.First fluid level transmitter 2 is used for chain control Liquid level adjusting valve 8, and HiAlm limit value and low alarm limits are arranged；The
Two fluid level transmitters 3 are used for the first safety cut-off valve of chain control 6, and low alarm limits are arranged.
The liquid level superelevation of blowdown drum 12 leads to the generation of overflow accident when blowdown operation in order to prevent, sets on blowdown drum 12
Set third fluid level transmitter 4.
To prevent the failure of Liquid level adjusting valve 8 from causing gas blowby to blowdown apparatus (when can not close), in Liquid level adjusting valve 8
The first safety cut-off valve 6 is arranged in upstream.First safety cut-off valve 6 should wear executing agency, and type is failure to safety, accident shape
State is FC.
It is unable to control discharge pressure after failing in order to prevent due to Liquid level adjusting valve 8, caused 12 superpressure of blowdown drum,
On header 22 and the second safety cut-off valve 10 is being set close to 12 entrance of blowdown drum.Second safety cut-off valve 10 should wear execution
Mechanism, type are failure to safety, accident condition FC.
Embodiment 2, a kind of online method for discharging pollution of the online blowdown apparatus applied to gas pipeline yard, this method include
Following steps:
Step 1, the first fluid level transmitter 2 measurement liquid collecting packet 14 level value, the first fluid level transmitter 2 to the level value into
Row judgement opens Liquid level adjusting valve 8 when the level value is high liquid level value, carries out the starting triggering of automatic pollution discharge；
When the level value is low liquid level value, Liquid level adjusting valve 8 is closed, carries out the stopping triggering of automatic pollution discharge；
When the failure of Liquid level adjusting valve 8 can not close, the first safety cut-off of 8 upstream of Liquid level adjusting valve setting is closed in triggering
Valve 6.
Meanwhile the first level gauging signal of the first fluid level transmitter 2 is accessed into instrument by first instrument cable 15 and is connect
The adjustment signal of Liquid level adjusting valve 8 is accessed instrument junction box 13 by the 4th instrument cable 18 by line case 13.
Step 2, the second fluid level transmitter 3 measurement liquid collecting packet 14 level value, the second fluid level transmitter 3 to the level value into
Row judgement, when the level value is low liquid level value, the first safety cut-off valve 6 of chain closing carries out the emergency cut-off of automatic pollution discharge；
Meanwhile the second level gauging signal of the second fluid level transmitter 3 is accessed into instrument by second instrument cable 16 and is connect
First shutoff signal of line case 13, the first safety cut-off valve 6 accesses instrument junction box 13 by third instrument cable 17.
Step 3, third fluid level transmitter 4 measure blowdown drum 12 level value, third fluid level transmitter 4 to the level value into
Row judgement, when the level value is high liquid level value, the second safety cut-off valve 10 is closed in triggering, carries out promptly cutting for automatic pollution discharge
It is disconnected；
Meanwhile the third level gauging signal of third fluid level transmitter 4 is accessed into instrument by the 7th instrument cable 21 and is connect
Second shutoff signal of line case 13, the second safety cut-off valve 10 accesses instrument junction box 13 by the 6th instrument cable 20.
Step 4, every road blowdown branch 5 is performed both by step 1-3.
Step 5, pressure transmitter 11 measures the pressure value of blowdown branch 5, and pressure transmitter 11 sentences the pressure value
Disconnected, when the pressure value is high pressure values, the second safety cut-off valve 10 of chain closing carries out the emergency cut-off of automatic pollution discharge；
Meanwhile the pressure signal of pressure transmitter 11 is accessed into instrument junction box 13 by the 5th instrument cable 19, by the
The third shutoff signal of two safety cut-off valves 10 accesses instrument junction box 13 by the 6th instrument cable 20.
Step 6, instrument junction box 13 receives the first level gauging signal, the second level gauging on every road blowdown branch 5
Signal, third level gauging signal, the first shutoff signal, adjustment signal, while instrument junction box 13 receives the on header 22
Two shutoff signals, pressure signal and third shutoff signal, and carried out data transmission by bus to SCADA system.
The present invention for Gas Stations using on-line automatic blowdown method after on-line automatic blowdown may be implemented.Online row
Equipment in dirty device is outdoor mounting design, and degree of protection is not less than IP65, and explosive-proof grade is not less than EXdIIBT4, complete
Full up foot open-air atmosphere and live requirement of explosion proof；The equipment of online blowdown apparatus is automatically controlled by SCADA system, can also be cut
Remote manual control model and on the spot MANUAL CONTROL mode are changed to, subsequent management is facilitated to control.
Blowdown flow velocity is effectively reduced using the regulatory function of Liquid level adjusting valve in the present invention, and control of sewage disposal pressure is in blowdown drum
Operating pressure below.In addition, a safety cut-off valve is arranged in blowdown drum suction line, one is arranged before safety cut-off valve
Fluid level transmitter is arranged in pressure transmitter on blowdown drum, and liquid level and pressure and safety cut-off valve progress is chain, when pressure reaches
To blowdown drum design pressure when or blowdown drum liquid level reach setting value when, it is chain close blowdown tube inlet safety cut-off valve simultaneously
Alarm can prevent blowdown drum superpressure caused by being unable to control discharge pressure and flow after failing as Liquid level adjusting valve or overflow
The generation of stream accident.
Meanwhile on-line automatic blowdown is to carry out automatic pollution discharge according to the height of filter plant (liquid collecting packet) interior liquid level.It has served as
When liquid level reaches high liquid level value in filter equipment, Liquid level adjusting valve is automatically opened, and liquid is discharged into the closed blowdown drum in downstream；When
When liquid level reaches low liquid level value in filter, Liquid level adjusting valve is automatically closed.Meanwhile to prevent Liquid level adjusting valve failure (can not
When closing) cause gas blowby to blowdown system device downstream, in Liquid level adjusting valve upstream, safety cut-off valve is set.When in liquid collecting packet
Liquid level when reaching low alarming value, triggering safety cut-off valve is closed, to prevent liquid level from further decreasing.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of online blowdown apparatus applied to gas pipeline yard, which is characterized in that the device includes:
An at least filter (1), filter (1) lower section are equipped at least one liquid collecting packet (14), the liquid collecting packet (14)
It is equipped with the first fluid level transmitter (2) and the second fluid level transmitter (3)；
At least blowdown branch (5), one end of the blowdown branch (5) are connected with the liquid collecting packet (14) all the way, the blowdown branch
Road (5) other end is connected with header (22), is successively arranged the first safety cut-off valve (6), the first technique on the blowdown branch (5)
Ball valve (7), Liquid level adjusting valve (8) and the second technique ball valve (9)；
Blowdown drum (12), the blowdown drum (12) are connected with the header (22), and the blowdown drum (12) is equipped with third liquid level
Transmitter (4)；
Header (22), one end on the header (22) close to the blowdown drum (12) are equipped with pressure transmitter (11) and second and pacify
Full stop valve (10)；
Instrument junction box (13), the instrument junction box (13) and first fluid level transmitter (2), second level transmitting
Device (3), first safety cut-off valve (6), the Liquid level adjusting valve (8), the pressure transmitter (11), second safety
Stop valve (10) is connected with the third fluid level transmitter (4).
2. online blowdown apparatus according to claim 1, which is characterized in that the online blowdown apparatus includes three filterings
Device (1), sets that there are two liquid collecting packet (14), each liquid collecting packet (14) and blowdown branch (5) phases all the way below every filter (1)
Even, six tunnel blowdown branches (5) are connected with the header (22).
3. online blowdown apparatus according to claim 1, which is characterized in that first fluid level transmitter (2) passes through the
One instrument cable (15) accesses the instrument junction box (13), and second fluid level transmitter (3) passes through second instrument cable
(16) the instrument junction box (13) is accessed, first safety cut-off valve (6) passes through described in third instrument cable (17) access
Instrument junction box (13), the Liquid level adjusting valve (8) access the instrument junction box (13), institute by the 4th instrument cable (18)
It states pressure transmitter (11) and the instrument junction box (13), second safety cut-off valve is accessed by the 5th instrument cable (19)
(10) the instrument junction box (13) is accessed by the 6th instrument cable (20), the third fluid level transmitter (4) passes through the 7th
Instrument cable (21) accesses the instrument junction box (13).
4. online blowdown apparatus according to claim 1, which is characterized in that first fluid level transmitter (2) with it is described
Liquid level adjusting valve (8) connection, second fluid level transmitter (3) connect with first safety cut-off valve (6), the third liquid
Position transmitter (4) is connect with second safety cut-off valve (10), the pressure transmitter (11) and second safety cut-off
Valve (10) connection.
5. a kind of a kind of online blowdown apparatus applied to gas pipeline yard as described in any one of claim 1-4
Online method for discharging pollution, which is characterized in that method includes the following steps:
Step 1, first fluid level transmitter (2) measures the level value of the liquid collecting packet (14), first fluid level transmitter
(2) level value is judged, when the level value is high liquid level value, opens the Liquid level adjusting valve (8)；When the level value
When for low liquid level value, the Liquid level adjusting valve (8) are closed；
Meanwhile the first level gauging signal of first fluid level transmitter (2) is accessed into instrument junction box (13), by the liquid
The adjustment signal of position regulating valve (8) accesses instrument junction box (13)；
Step 2, second fluid level transmitter (3) measures the level value of the liquid collecting packet (14), second fluid level transmitter
(3) level value is judged, when the level value is low liquid level value, closes first safety cut-off valve (6)；
Meanwhile the second level gauging signal of second fluid level transmitter (3) is accessed into the instrument junction box (13), by institute
The first shutoff signal for stating the first safety cut-off valve (6) accesses the instrument junction box (13)；
Step 3, the third fluid level transmitter (4) measures the level value of the blowdown drum (12), the third fluid level transmitter
(4) level value is judged, when the level value is high liquid level value, closes second safety cut-off valve (10)；
Meanwhile the third level gauging signal of the third fluid level transmitter (4) is accessed into the instrument junction box (13), by institute
The second shutoff signal for stating the second safety cut-off valve (10) accesses the instrument junction box (13)；
Step 4, every road blowdown branch (5) is performed both by step 1-3；
Step 5, the pressure transmitter (11) measures the pressure value of the blowdown branch (5), and the pressure transmitter (11) is right
The pressure value is judged, when the pressure value is high pressure values, closes second safety cut-off valve (10)；
Meanwhile the pressure signal of the pressure transmitter (11) is accessed into the instrument junction box (13), by second safety
The third shutoff signal of stop valve (10) accesses the instrument junction box (13)；
Step 6, the instrument junction box (13) receives the first level gauging signal on every road blowdown branch (5), described
Second level gauging signal, the third level gauging signal, first shutoff signal, the adjustment signal, at the same it is described
Instrument junction box (13) receives second shutoff signal, the pressure signal and third cutting on the header (22)
Signal, and carried out data transmission by bus to SCADA system.
6. online method for discharging pollution according to claim 5, which is characterized in that in step 1, when the Liquid level adjusting valve (8)
When failure can not close, the first safety cut-off valve (6) of the Liquid level adjusting valve (8) upstream setting is closed.
7. online method for discharging pollution according to claim 5, which is characterized in that in step 1, first fluid level transmitter
(2) the first level gauging signal passes through first instrument cable (15) access instrument junction box (13), the Liquid level adjusting valve (8)
Adjustment signal by the 4th instrument cable (18) access instrument junction box (13).
8. online method for discharging pollution according to claim 5, which is characterized in that in step 2, second fluid level transmitter
(3) the second level gauging signal accesses the instrument junction box (13), first safety by second instrument cable (16)
First shutoff signal of stop valve (6) accesses the instrument junction box (13) by third instrument cable (17).
9. online method for discharging pollution according to claim 5, which is characterized in that in step 3, the third fluid level transmitter
(4) third level gauging signal accesses the instrument junction box (13), second safety by the 7th instrument cable (21)
Second shutoff signal of stop valve (10) accesses the instrument junction box (13) by the 6th instrument cable (20).
10. online method for discharging pollution according to claim 5, which is characterized in that in step 5, by the pressure transmitter
(11) pressure signal accesses the instrument junction box (13) by the 5th instrument cable (19), by second safety cut-off valve
(10) third shutoff signal accesses the instrument junction box (13) by the 6th instrument cable (20).
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| CN108386595B (en) * | 2018-02-13 | 2019-08-30 | 东莞三江港口储罐有限公司 | A kind of emergency shutoff device for petrochemical industry storage sector |
| CN111187135B (en) * | 2020-01-16 | 2022-09-30 | 华亭煤业集团有限责任公司 | Prevent that gaseous phase feeding from taking liquid's safe collecting system |
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| CN105861025A (en) * | 2016-06-02 | 2016-08-17 | 中国石油天然气集团公司 | Recovery device and method for liquid-state light hydrocarbon in gas pipeline |
| CN205824610U (en) * | 2016-06-12 | 2016-12-21 | 江苏永钢集团有限公司 | Different pressure gas pipeline network interworking unit |
| CN106400839A (en) * | 2016-12-02 | 2017-02-15 | 中冶京诚工程技术有限公司 | Natural gas cabin of utility tunnel |
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