CN106597943A - System and method capable of carrying out fuel oil leakage test after MFT of boiler - Google Patents
System and method capable of carrying out fuel oil leakage test after MFT of boiler Download PDFInfo
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- CN106597943A CN106597943A CN201611180950.2A CN201611180950A CN106597943A CN 106597943 A CN106597943 A CN 106597943A CN 201611180950 A CN201611180950 A CN 201611180950A CN 106597943 A CN106597943 A CN 106597943A
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- 239000000295 fuel oil Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 117
- 239000000446 fuel Substances 0.000 claims description 64
- 238000010926 purge Methods 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 239000000463 material Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010001541 Akinesia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Classifications
-
- 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
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0426—Programming the control sequence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/02—Liquid fuel
- F23K5/14—Details thereof
- F23K5/16—Safety devices
-
- 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
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23076—Pushbuttons to manually up or down control of motor also for entry of program
-
- 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
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23199—Reference value, setpoint for regulator
-
- 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
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23289—State logic control, finite state, tasks, machine, fsm
-
- 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
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23375—Function switch, knob with piezo, strain gauge
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention relates to a system and method capable of carrying out a fuel oil leakage test after the MFT of a boiler, and the system consists of a fuel oil leakage test performing button, a software channel module, a DO clamping piece, a hardware channel terminal, a control cable, an MFT tripping oil incoming fast valve loop, an oil incoming fast valve bypass loop, an MFT tripping oil returning fast valve loop, an oil returning fast valve bypass loop. The MFT tripping oil incoming fast valve loop consists of a power supply module, an oil incoming fast valve, an oil incoming fast valve DCS control instruction relay, and an MFT tripping oil incoming fast valve relay. The MFT tripping oil returning fast valve loop consists of a power supply module, an oil returning fast valve, an oil returning fast valve DCS control instruction relay, and an MFT tripping oil returning fast valve relay. After the above technical scheme is employed, the system can achieve the cut off the locking, caused by tripping MFT of a main material of the boiler, of oil incoming fast valve and the oil returning fast valve, and successfully carries out the fuel oil leakage test during the MFT.
Description
Technical field
The present invention relates to a kind of power plant boiler occurs after MFT, the control of fuel leakage test can be carried out before furnace purge
System processed.
Background technology
Boiler occurs after MFT, to carry out furnace purge before ignition of the boiler, and establishing criteria DL/T1091-2008《Firepower
Power plant boiler Furnace Safeguard Supervisory System technical regulation》5.1.4.2 in, fuel leakage test is distinctly claimed, oil leakage
Success of the test is one of furnace purge condition, in the condition that should be met during same 5.2.4 furnace purges, it is desirable to oily leak test into
Work(, it is therefore an objective to which the fuel oil that will likely can be leaked in burner hearth in furnace purge blows away, it is ensured that detonation does not occur during igniting.
The valve that action is needed in fuel leakage process of the test is oil-feed fast valve and oil return fast valve, the soft logic of DCS
Loop and the hard trip(ping) circuits of MFT are controlled to the normally closed node control loop of unicoil to the two valves, in existing system,
After boiler occurs MFT, oil-feed fast valve and oil return fast valve are limited in closing shape by MFT by the out code of rest-set flip-flop
State, in this case, oil-feed fast valve and oil return fast valve loop are uncharged, even if DCS sends OPEN, not
In the case of carrying out furnace purge i.e. MFT signals not occurring involution, oil-feed fast valve and oil return fast valve can not be operated, so
The starting time of boiler will significantly be postponed, the quick startup of Generator Set is affected.
The content of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that a kind of after boiler occurs MFT, furnace purge advance
The system of row oil leak test, the system carries out button, software channel module, DO fasteners, hardware corridor by fuel leakage test
Terminal, control cable, MFT tripping operations oil-feed fast valve loop, oil-feed fast valve bypass loop, MFT tripping operation oil return fast valves loop,
Oil return fast valve bypass loop is constituted, and described fuel leakage test carries out button, and in parallel mode is connected with two softwares and leads to
Road module, described two software channels are connected with DO fasteners, and two hardware corridor terminals are provided with described DO fasteners, described
Two hardware corridor terminals on DO fasteners are bypassed respectively by control cable with oil-feed fast valve bypass loop, oil return fast valve
Loop is attached.Described MFT tripping operation oil-feed fast valve loops are by supply module, oil-feed fast valve, oil-feed fast valve DCS controls
Commands relays processed, MFT trip oil-feed fast valve relay group into the oil-feed fast valve bypass loop trips with the MFT
Oil-feed quick closing valve valve relay is in parallel；Described MFT tripping operations oil return fast valve loop is fast by supply module, oil return fast valve, oil return
Close valve DCS control instructions relay and MFT and trip oil return fast valve relay group into, the oil return fast valve bypass loop and institute
State MFT tripping operation oil return quick closing valve valve relays in parallel；Hard channel terminals are located in DO fasteners, oil-feed fast valve bypass loop, oil return
Fast valve bypass loop is connected respectively by cable with the hard channel terminals on DO fasteners.After using the program, can realize cutting
Except the oil-feed fast valve and oil return quick closing valve valve blocking that cause due to boiler main fuel trip MFT, smoothly realize being fired in MFT
Oily leak test.
Further, logic during fuel leakage test is carried out is preset in described oil-feed fast valve.
Further, logic during fuel leakage test is carried out is preset in described oil return fast valve.
Preferably：Oil-feed fast valve DCS control instruction relays, oil return fast valve DCS control instruction relays are big
Capacity DC 220V relays.
Further, oil-feed fast valve DCS control instruction relays, the board of oil return fast valve DCS control instruction relays
It is arranged apart, be so conducive to the safe and stable operation of system.
Increase logic during fuel leakage test is carried out in oil-feed fast valve control logic, it is other when logical signal is " 1 "
Road MFT action signals, make the valve after MFT generations, force OFF signal to be cancelled, it is allowed to which ON signal is enabled, valve energy automatic switch；
Increase logic during fuel leakage test is carried out in oil return fast valve control logic, it is other when logical signal is " 1 "
Road MFT action signals, make the valve after MFT generations, force OFF signal to be cancelled, it is allowed to which ON signal is enabled, valve energy automatic switch；
Two DO passages defined in DCS logics, and be sent to respectively by DO fasteners and control cable 1 and control cable 2
In the hard control loop of oil-feed fast valve and oil return fast valve；
Increase in oil-feed fast valve control loop, oil return fast valve control loop and MFT relay cabinet relay module
MFT tripping operation oil-feed fast valve bypass loops and MFT tripping operation oil return fast valve bypass loops；
On the basis of using the program, present invention also offers one kind is carried out before boiler occurs MFT rear hearths purging
The method of fuel leakage test, comprises the following steps：
S1：After boiler occurs MFT, before furnace purge, fuel leakage test is carried out, fuel leakage test is mainly to pot
The effusion meter used on oil-piping, valve, pipeline and the pressure test of some subsidiary pressure-containing members of stove, its main purpose is inspection
Test the load performance and tightness of boiler oil system, it is ensured that the reliably working of oil circuit.
S2：After fuel leakage test starts, oil return fast valve is first shut off, fuel oil is female to fuel oil under the suppressing of oil feed pump
Pipe carry out it is oil-filled, Oil feeding process be 60 seconds, if after 60s fuel oil main pipe " pressure satisfaction " is (i.e.：Pressure fires higher than unit design
Oily leak test definite value) signal presence, then the oil-filled success of fuel oil main pipe；If within 60 second time, fuel oil main pipe cannot be by pressure
The claimed range in " pressure satisfaction " is controlled, then illustrates that a certain link in fuel oil main pipe, oily angle valve or oil return fast valve is present
Significant leakage, the interface of leak test then shows " oil-filled failure "；
S3：If the oil-filled success of fuel oil main pipe, is automatically switched off fuel oil fast valve；When the oil-filled success of fuel oil main pipe, fuel oil quick closing valve
After valve is closed, now oil-feed fast valve and oil return fast valve Close All, fuel oil before is in air-tight state, if at 180 seconds
It is interior, if " pressure satisfaction " signal in fuel oil main pipe is present always, illustrate that oily angle valve is not leaked, the leakage examination of oily angle valve
Test successfully；If " pressure satisfaction " signal disappeared in 180 seconds in fuel oil main pipe, illustrate that oily angle valve has leakage, then fuel leakage
Test failure；
S4：Fuel leakage test carries out middle signal and sends to MFT tripping operation bypass loops, normal opened contact closure, at this moment passes through
Fuel leakage tests program control Automatic Program and sends DCS control instructions 1 and instruction 2, and fuel leakage test can be before furnace purge
Carry out.
The present invention for realize before furnace purge is completed, carry out fuel leakage test when, can with dexterous actions the two
Valve, after fuel leakage off-test, this two valves of block action before MFT involutions, realizing can be with before furnace purge
Carry out fuel leakage test.
Beneficial effects of the present invention are：1st, solve before boiler occurs MFT rear hearths purging, do not remove MFT tripping operations hard
Wiring cannot carry out a difficult problem for fuel leakage test, realize fuel leakage success of the test as the condition of furnace purge.2、
Investment cost is low, easily operation, one of ordinary skill in the art, original system can be carried out by the reading present invention excellent
Change transformation.
Description of the drawings
In order to be illustrated more clearly that the present invention, embodiment will be described below needed for the accompanying drawing to be used simply be situated between
Continue.It should be evident that drawings in the following description are only the description to embodiments of the invention, for ordinary skill
For personnel, without having to pay creative labor, can be carrying out simple deformation or title according to technical scheme
Change, or take customary means, it is also possible to realize goal of the invention.
Fig. 1 fuel leakages test bypass MFT circuit diagrams.
Fig. 2 oil-feed fast valve DCS logic control charts；
Fig. 3 oil return fast valve DCS logic control charts；
" MFT " being related in application documents refers to main fuel trip for Main Fuel Trip, and " DO " is Digital
Output refers to digital output, and " DCS " refers to scattered control system for Distributed Control System.
Label declaration：The test of 1- fuel leakages carries out button, 2- software channel modules, 3-DO fasteners, 4- hardware corridors end
Son, 5- control cables, 6- oil-feed fast valves, 7- oil-feed fast valve bypass loops, 8- oil-feed fast valve DCS control instruction relays
Device, 9-MFT tripping operation oil-feed fast valves loop, 10- oil return fast valves, 11- oil return fast valve DCS control instruction relays, 12- is returned
Oily fast valve bypass loop, 13-MFT tripping operation oil return fast valves loop, 14-MFT tripping operation oil-feed quick closing valve valve relays, 15-MFT is jumped
Lock oil return quick closing valve valve relay, 16- oil-feed fast valve supply modules, 17- oil return fast valve supply modules
Specific embodiment
Embodiments of the invention are elaborated below, the present embodiment carries out reality under premised on the technical program
Apply, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following embodiments.
Embodiment 1
As shown in figure 1, a kind of carry out the system of fuel leakage test after boiler occurs MFT, by fuel leakage test into
Row button 1, software channel module 2, DO fasteners 3, hardware corridor terminal 4, control cable 5, MFT tripping operation oil-feed fast valve loop 9,
Oil-feed fast valve bypass loop 7, MFT tripping operation oil return fast valve loop 13, oil return fast valve bypass loop 12 constitutes, described combustion
Oily leak test carries out button 1, and in parallel mode is connected with two software channel modules 2, described two software channels 2 and DO
Fastener 3 is connected, and two hardware corridor terminals 4 is provided with described DO fasteners 3, two hardware corridors on the DO fasteners 3
Terminal 4 is attached respectively by control cable 5 with oil-feed fast valve bypass loop 7, oil return fast valve bypass loop 12.It is described
MFT tripping operations oil-feed fast valve loop 9 controlled by oil-feed fast valve supply module 16, oil-feed fast valve 6, oil-feed fast valve DCS
Commands relays 8, MFT tripping operation oil-feed quick closing valve valve relay 14 is constituted, and the oil-feed fast valve bypass loop 7 is jumped with the MFT
Lock oil-feed quick closing valve valve relay 14 is in parallel；Described MFT tripping operation oil return fast valves loop 13 by oil return fast valve supply module 17,
Oil return fast valve 10, oil return fast valve DCS control instructions relay 11 and MFT tripping operation oil return quick closing valve valve relay 15 is constituted, institute
State oil return fast valve bypass loop in parallel with MFT tripping operation oil return quick closing valve valve relays 15；Hard channel terminals are located at DO fasteners
Interior, oil-feed fast valve bypass loop, oil return fast valve bypass loop are connected respectively by the hard channel terminals on cable and DO fasteners
Connect.Within the system, oil-feed fast valve DCS control instruction relays, oil return fast valve DCS control instructions relay are Large Copacity
Direct current 220V relays, and board is arranged apart.
Removing locked signal carries out button 1 by the fuel leakage test in DCS logics, is sent to DCS software channel moulds
In block 2, then software instruction is entered in DO fasteners 3, respectively by hardware corridor terminal 4, is jumped into MFT along control cable 5
In lock oil-feed fast valve bypass loop 7 and MFT tripping operation oil return fast valves bypass loop 12, when boiler occurs MFT main fuel trips
When, the locking that MFT signals pass through MFT tripping operation oil-feed fast valves loop 9 and MFT tripping operation oil return fast valves loop 13, oil-feed quick closing valve
Valve 6 and oil return fast valve 10 are akinesias.
After boiler occurs MFT, before furnace purge, fuel leakage test is carried out, fuel leakage test is mainly to boiler
The effusion meter used on oil-piping, valve, pipeline and some subsidiary pressure-containing members pressure test, its main purpose be inspection
The load performance and tightness of boiler oil system, it is ensured that the reliably working of oil circuit.When boiler occurs MFT, now to carry out
Fuel leakage is tested, and DCS is sent after the instruction for starting fuel leakage test, logical by above-mentioned software and hardware with regard to removing locked signal
Road, control cable are sent in MFT tripping operation oil-feed fast valves bypass loop 7 and MFT tripping operation oil return fast valves bypass loop 12, so
The program that just can be tested according to set fuel leakage, by oil-feed fast valve DCS control instructions relay 8 and oil return fast valve
DCS control instructions relay 11 opening and closing oil-feed fast valve 6 and oil return fast valve 10, so as to smoothly without the carrying out of locking
Fuel leakage is tested.As shown in Fig. 2 increase logic during fuel leakage test is carried out in oil-feed fast valve control logic, when
When logical signal is " 1 ", MFT action signals are bypassed, make the valve after MFT generations, force OFF signal to be cancelled, it is allowed to which ON signal makes
Can, valve energy automatic switch；As shown in figure 3, increase logic during fuel leakage test is carried out in oil return fast valve control logic,
When logical signal is " 1 ", MFT action signals are bypassed, make the valve after MFT generations, force OFF signal to be cancelled, it is allowed to ON signal
Enable, valve energy automatic switch；Two DO passages defined in DCS logics, and by DO fasteners and control cable 1 and control electricity
Cable 2 is sent to respectively in the hard control loop of oil-feed fast valve and oil return fast valve；In oil-feed fast valve control loop, oil return quick closing valve
Increase MFT tripping operation oil-feed fast valve bypass loops and MFT tripping operation oil returns in valve control loop and MFT relay cabinet relay module
Fast valve bypass loop；
The concrete grammar step for carrying out fuel leakage test using the system is as follows：After fuel leakage test starts, first
Close oil return fast valve, fuel oil fuel oil main pipe is carried out under the suppressing of oil feed pump it is oil-filled, Oil feeding process be 60 seconds, if at 60 seconds
Afterwards fuel oil main pipe " pressure satisfaction " signal is present, then the oil-filled success of fuel oil main pipe；If within 60 second time, fuel oil main pipe cannot be by
Stress control then illustrates a certain link in fuel oil main pipe, oily angle valve or oil return fast valve in the claimed range of " pressure satisfaction "
There is significant leakage, the interface of leak test then shows " oil-filled failure "；If the oil-filled success of fuel oil main pipe, is automatically switched off fuel oil fast
Close valve；When the oil-filled success of fuel oil main pipe, after fuel oil fast valve is closed, now oil-feed fast valve and oil return fast valve Close All,
Fuel oil before is in air-tight state, if in 180 seconds, if " pressure satisfaction " signal in fuel oil main pipe is present always,
Illustrate that oily angle valve is not leaked, the leak test success of oily angle valve；If " pressure satisfaction " signal was in 180 seconds internal diabetes in fuel oil main pipe
Lose, illustrate that oily angle valve has leakage, then fuel leakage test failure；Fuel leakage test carries out middle signal and sends to MFT tripping operations
At this moment bypass loop, normal opened contact closure tests program control Automatic Program and sends DCS control instructions 1 and instruction by fuel leakage
2, fuel leakage test can be carried out before furnace purge.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make some improvements and modifications, and these improvements and modifications also should be regarded as
In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention
Scope, any technical staff for being familiar with the technology, in the variation made without departing from the spirit and scope of the invention and retouching,
Protection scope of the present invention all should be belonged to.
Claims (7)
1. it is a kind of to carry out the system of fuel leakage test after boiler occurs MFT, it is characterised in that described system is let out by fuel oil
Leakage test carries out button, software channel module, DO fasteners, hardware corridor terminal, control cable, MFT tripping operation oil-feed fast valves and returns
Road, oil-feed fast valve bypass loop, MFT tripping operation oil return fast valves loop, oil return fast valve bypass loop composition, described MFT
Tripping operation oil-feed fast valve loop by supply module, oil-feed fast valve, oil-feed fast valve DCS control instruction relays, MFT trip into
Oily fast valve relay group is into the oil-feed fast valve bypass loop is in parallel with MFT tripping operation oil-feed quick closing valve valve relays；Institute
State MFT tripping operation oil return fast valve loop by supply module, oil return fast valve, oil return fast valve DCS control instructions relay and
MFT trips oil return fast valve relay group into, the oil return fast valve bypass loop and MFT tripping operation oil return fast valve relays
Device is in parallel；Hardware corridor terminal is located in DO fasteners, and oil-feed fast valve bypass loop, oil return fast valve bypass loop pass through respectively
Cable is connected with the hard channel terminals on DO fasteners.
2. a kind of system that fuel leakage test is carried out after boiler occurs MFT as claimed in claim 1, it is characterised in that
Described fuel leakage test carries out button, and in parallel mode is connected with two software channel modules, described two software channels
It is connected with DO fasteners, two hardware corridor terminals is provided with described DO fasteners, two hardware corridors on the DO fasteners
Terminal is attached respectively by controlling cable with oil-feed fast valve bypass loop, oil return fast valve bypass loop.
3. a kind of system that fuel leakage test is carried out after boiler occurs MFT as claimed in claim 1 or 2, its feature exists
In, preset in described oil-feed fast valve fuel leakage test carry out in logic.
4. a kind of system that fuel leakage test is carried out after boiler occurs MFT as claimed in claim 1 or 2, its feature exists
In, preset in described oil return fast valve fuel leakage test carry out in logic.
5. a kind of system that fuel leakage test is carried out after boiler occurs MFT as claimed in claim 1 or 2, its feature exists
In the oil-feed fast valve bypass loop control instruction relay, oil return fast valve bypass loop control instruction relay are big
Capacity DC 220V relays.
6. a kind of system that fuel leakage test is carried out after boiler occurs MFT as claimed in claim 1 or 2, its feature exists
In the oil-feed fast valve bypass loop control instruction relay, the DO of oil return fast valve bypass loop control instruction relay
Fastener is arranged apart.
7. a kind of method that fuel leakage test is carried out before boiler occurs MFT rear hearths purging, it is characterised in that using as weighed
Profit requires a kind of system that fuel leakage test is carried out after boiler occurs MFT described in 1 or 4, patrols in the control of oil-feed fast valve
Increasing fuel leakage test in volume carries out middle logic, when logical signal is " 1 ", bypasses MFT action signals, makes the valve in MFT
After generation, OFF signal is forced to be cancelled, it is allowed to which ON signal is enabled, valve energy automatic switch；
Increase logic during fuel leakage test is carried out, when logical signal is " 1 ", bypass in oil return fast valve control logic
MFT action signals, make the valve after MFT generations, force OFF signal to be cancelled, it is allowed to which ON signal is enabled, valve energy automatic switch；
Two DO passages defined in DCS logics, and oil-feed is sent to respectively by DO fasteners and control cable 1 and control cable 2
In the hard control loop of fast valve and oil return fast valve；
Increase MFT in oil-feed fast valve control loop, oil return fast valve control loop and MFT relay cabinet relay module to jump
Lock oil-feed fast valve bypass loop and MFT tripping operation oil return fast valve bypass loops；
Comprise the following steps：
S1：After boiler occurs MFT, before furnace purge, fuel leakage test is carried out；
S2：After fuel leakage test starts, oil return fast valve is first shut off, fuel oil enters under the suppressing of oil feed pump to fuel oil main pipe
Row it is oil-filled, Oil feeding process be 60 seconds, if after 60s fuel oil main pipe " pressure satisfactions " signal presence, fuel oil main pipe it is oil-filled into
Work(；If within 60 second time, fuel oil main pipe cannot then illustrate that fuel oil is female by Stress control in the claimed range of " pressure satisfaction "
There is significant leakage in a certain link in pipe, oily angle valve or oil return fast valve, the interface of leak test then shows " oil-filled failure "；
S3：If the oil-filled success of fuel oil main pipe, is automatically switched off fuel oil fast valve；When the oil-filled success of fuel oil main pipe, fuel oil fast valve is closed
After closing, now oil-feed fast valve and oil return fast valve Close All, fuel oil before is in air-tight state, if in 180 seconds, such as
" pressure satisfaction " signal in fruit fuel oil main pipe is present always, then illustrate that oily angle valve is not leaked, the leak test of oily angle valve into
Work(；If " pressure satisfaction " signal disappeared in 180 seconds in fuel oil main pipe, illustrate that oily angle valve has leakage, then fuel leakage test
Failure；
S4：Fuel leakage test carries out middle signal and sends to MFT tripping operation bypass loops, normal opened contact closure, at this moment by fuel oil
The program control Automatic Program of leak test sends DCS control instructions 1 and instruction 2, and fuel leakage test can be carried out before furnace purge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611180950.2A CN106597943A (en) | 2016-12-20 | 2016-12-20 | System and method capable of carrying out fuel oil leakage test after MFT of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611180950.2A CN106597943A (en) | 2016-12-20 | 2016-12-20 | System and method capable of carrying out fuel oil leakage test after MFT of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106597943A true CN106597943A (en) | 2017-04-26 |
Family
ID=58600103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611180950.2A Pending CN106597943A (en) | 2016-12-20 | 2016-12-20 | System and method capable of carrying out fuel oil leakage test after MFT of boiler |
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| CN (1) | CN106597943A (en) |
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| CN205079254U (en) * | 2015-07-08 | 2016-03-09 | 大唐阳城发电有限责任公司 | Boiler fuel oil system leaks safety monitoring device |
| CN205102159U (en) * | 2015-10-21 | 2016-03-23 | 中国大唐集团科学技术研究院有限公司华中分公司 | Boiler fuel leak test shunting device |
| CN206741244U (en) * | 2016-12-20 | 2017-12-12 | 华电电力科学研究院 | A kind of system in boiler occurring that fuel leakage experiment can be carried out after MFT |
-
2016
- 2016-12-20 CN CN201611180950.2A patent/CN106597943A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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