CN107723011A - Method for online water cutting of hole-pulling of negative pressure gas system - Google Patents
Method for online water cutting of hole-pulling of negative pressure gas system Download PDFInfo
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- CN107723011A CN107723011A CN201711114109.8A CN201711114109A CN107723011A CN 107723011 A CN107723011 A CN 107723011A CN 201711114109 A CN201711114109 A CN 201711114109A CN 107723011 A CN107723011 A CN 107723011A
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- Prior art keywords
- hole
- primary cooler
- nitrogen
- pulling
- pipeline
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 44
- 239000003034 coal gas Substances 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 15
- 238000010926 purge Methods 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 239000003245 coal Substances 0.000 claims description 9
- 239000012716 precipitator Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000010425 asbestos Substances 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 210000002445 nipple Anatomy 0.000 claims description 4
- 244000144985 peep Species 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010304 firing Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000011269 tar Substances 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000004939 coking Methods 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- CWRYPZZKDGJXCA-UHFFFAOYSA-N acenaphthene Chemical compound C1=CC(CC2)=C3C2=CC=CC3=C1 CWRYPZZKDGJXCA-UHFFFAOYSA-N 0.000 description 4
- 241001504664 Crossocheilus latius Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- HXGDTGSAIMULJN-UHFFFAOYSA-N acetnaphthylene Natural products C1=CC(C=C2)=C3C2=CC=CC3=C1 HXGDTGSAIMULJN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 description 1
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002641 tar oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Industrial Gases (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention relates to a method for online water cutting hole pulling of a negative pressure gas system, which is characterized in that a primary cooler is cleaned, the resistance of a single primary cooler is not more than 0.9kPa, one path of nitrogen cleaning is carried out from the outlet of the primary cooler to be processed, the other path of nitrogen cleaning is carried out from the discharge pipe of a traffic pipe, and nitrogen directly enters a gas main pipe network; performing a third path of nitrogen cleaning from the fault valve of the primary cooler to be processed to the body of the primary cooler to be processed; hole-pulling operation is carried out in the fire-proof grate, short sections are welded on the original gas pipeline at the position of the simulated hole-pulling position respectively, gate valves are installed on the short sections, and the hole-pulling machine for water cutting is operated to cut and pull out iron plates in the intersecting area of the outer wall of the original pipeline and the short sections. The advantages are that: the accident that the weight falls off of the outlet valve can be safely handled, in order to avoid igniting coal gas in the pipeline in the process of firing, protective nitrogen is introduced into key positions of the primary cooler body and the auxiliary pipeline in the whole hole-pulling process, positive pressure is kept in the hole-pulling pipeline and the device, and external air is difficult to enter.
Description
Technical field
The present invention relates to a kind of method that online Water Cutting of negative pressure coal gas system pulls hole.
Background technology
Primary cooler is that chemical industry recovery operation area first is cooled down to coke-stove gas, removes Jiao carried secretly in raw coke oven gas
Oil, naphthalene, acenaphthene etc. easily blocks the device of cut, and vital effect is played in drum cooling working procedure.Coal gas collects temperature after primary cooler
Degree is also known as " set temperature " to later process important.
One recovery operation area enters primary cooler using 5 " transverse tube type " primary cooler designs in parallel, coke-stove gas from top,
Recirculated water, water at low temperature are walked in primary cooler epimere, hypomere tube bank respectively, and coal gas passes through from top to down in shell.The primary cooler positive runtime
Between upper and lower section of sprinkling condensate liquid, condensate liquid flows automatically to upper and lower section of gas liquor sealing groove by Action of Gravity Field, and then enters upper and lower section
Liquid bath is condensed, is sprayed using pump circulation.Convey the electric blower that coal gas power resources are 2 operations, wherein coal before air blower
Feed channel is~3.0KPa negative pressure, after machine is~15kPa malleation, before primary cooler suction be maintained at 1.2kPa~1.5kPa it
Between.Coke-stove gas is sent to next procedure after primary cooler, electrical tar precipitator by air blower successively.
In August, 2016,5# primary coolers outlet valve falls stone roller, and (mechanical device failure valve can not be beaten again i.e. in valve
Open), it is that continuous negative pressure coal gas system and the specific position for falling to cut or polish jade with an emery wheel valve are limited by process environments, 1# -5# primary cooler entrances have
Single control valve but separate unit primary cooler gas exit pipeline is connected on outlet header road, primary cooler gas exit total pipeline
On without control valve, so the replacing that can not stop production.Four primary cooler operation main harms are：A separate unit primary coolers resistance increases,
Increase cleans frequency and then increases the corrosion to inside tube bank.B air blowers load increases, suction regulation elasticity space before primary cooler
Reduce, coking may be caused to diffuse.C coal gas flow velocity increase flow time in primary cooler is reduced, and condensate liquid spray effect weakens,
The cut such as naphthalene, acenaphthene blocking device and pipeline in coal gas.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of online Water Cutting of negative pressure coal gas system to pull hole
Method, it is quick, effectively solve failsafe valve, avoid coking from diffusing.Primary cooler can be made to put into operation again, drum is cold extensive
Running status is restored, reduces primary cooler system, every critical process such as electrical tar precipitator system gas resistance, stable set temperature
Parameter.Reduce coal gas and three big product losses.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of method that online Water Cutting of negative pressure coal gas system pulls hole, comprises the following steps：
1) primary cooler is cleaned, separate unit primary cooler resistance is not more than 0.9kPa, for maintaining remaining primary cooler in short term
Production is protected in operation, and nitrogen purge all the way, tolerance 40-80m are from the outlet of pending primary cooler3/ h, nitrogen are directly entered coal gas supervisor
Net, another way nitrogen purge, tolerance 40-80m are at traffic pipe exhaust stack3/ h, nitrogen are directly entered coal gas supervisor's net；From treating
Processing primary cooler defective valves are the 3rd tunnel nitrogen purge, tolerance 40-80m to pending primary cooler body in front of the door3/ h, nitrogen is from first
Exhaust stack diffuses at the top of cooler；
2) electrical tar precipitator powers off, and avoids hidden danger caused by air entrance；
3) blind plate is blocked up between hypomere condensation liquid bath and hot wash oil square groove, hot wash oil square groove volume of pouring water is not less than hot wash oil groove
The 4/5 of solvent；Hypomere gas liquor sealing groove peep hole valve is closed, leads to nitrogen to hypomere water seal for coal gas groove and hypomere condensation liquid bath；
4) hole site gas piping thickness measuring is pulled to plan using calibrator, it is ensured that pull hole site tube wall average wall thickness and be not less than
6mm；
5) pull and fire prevention double-edged fine-toothed comb is built at hole, and carry out pulling hole operation in fire prevention double-edged fine-toothed comb, intending pulling raw coal feed channel at hole
Pipe nipple is respectively welded and gate valve is installed, Water Cutting pulls hole machine operation and former pipeline outer wall and short knot are mutually passed through into iron plate cutting inside region
Pull out, and tapered pipeline is installed and is connected to primary cooler gas exit house steward；Hole point is pulled at two and is located at pending primary cooler coal respectively
Before gas outlet conduit valve and at pending primary cooler gas exit total pipeline.
Described fire prevention double-edged fine-toothed comb is the enclosed construction of blind plate or asbestos composition.
Described nitrogen is sent to desulfurization process with coal gas by air blower.
Compared with prior art, the beneficial effects of the invention are as follows：
This method can the processing outlet valve of safety fall the accident of stone roller, to avoid igniting in pipeline during getting angry
Coal gas, entirely pull and be passed through protection medium nitrogen in primary cooler body and a few place's key positions of subsidiary pipeline during eye, keep pulling
It is malleation in eye pipeline and device, extraneous air is difficult to enter.It can be closed with fire prevention double-edged fine-toothed comb and be possible to the path for splashing Mars,
Fundamentally 2 points in cut-out burning " three elements " are oxidizer, burning things which may cause a fire disaster, and then ensure the safety progress of operation.
Pending primary cooler is put into operation again, drum cold recovery original running status, reduce primary cooler system, electric fishing
Every key process parameters such as tar device system gas resistance, stable set temperature.Realize quick, effective solution valve event
Barrier, increase air blower regulation elasticity space, avoids coking from diffusing.Reduce coal gas and three big product losses.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is that coal gas of the present invention moves towards schematic diagram.
Fig. 3 is to pull hole operation schematic diagram.
In figure：1-5# primary coolers 2- pulls 3- hot wash oil square groove 4- hypomeres gas liquor sealing groove 5- gas in upper segment water seals at hole
Groove 6- hypomeres condensation liquid bath 7- epimere condensation liquid bath 8- air blower water sealed tank 9- air blower 10- electrical tar precipitators 11- is short
Save 12- valves.
Embodiment
The present invention is described in detail with reference to Figure of description, it should be noted that the implementation of the present invention is unlimited
In following embodiment.
A kind of method that online Water Cutting of negative pressure coal gas system pulls hole, comprises the following steps：
1) primary cooler is cleaned, separate unit primary cooler resistance is not more than 0.9kPa, for maintaining remaining primary cooler in short term
Production is protected in operation, and nitrogen purge all the way, tolerance 40-80m are from the outlet of pending primary cooler3/ h, nitrogen are directly entered coal gas supervisor
Net, another way nitrogen purge, tolerance 40-80m are at traffic pipe exhaust stack3/ h, nitrogen are directly entered coal gas supervisor's net；From treating
Processing primary cooler defective valves are the 3rd tunnel nitrogen purge, tolerance 40-80m to pending primary cooler body in front of the door3/ h, nitrogen is from first
Exhaust stack diffuses at the top of cooler；
2) electrical tar precipitator powers off, and avoids hidden danger caused by air entrance；
3) blind plate is blocked up between hypomere condensation liquid bath and hot wash oil square groove, hot wash oil square groove volume of pouring water is not less than hot wash oil groove
The 4/5 of solvent；Hypomere gas liquor sealing groove peep hole valve is closed, leads to nitrogen to hypomere water seal for coal gas groove and hypomere condensation liquid bath；
4) hole site gas piping thickness measuring is pulled to plan using calibrator, it is ensured that pull hole site tube wall average wall thickness and be not less than
6mm；
5) pull and fire prevention double-edged fine-toothed comb is built at hole, and carry out pulling hole operation in fire prevention double-edged fine-toothed comb, intending pulling raw coal feed channel at hole
Pipe nipple is respectively welded and gate valve is installed, Water Cutting pulls hole machine operation and former pipeline outer wall and short knot are mutually passed through into iron plate cutting inside region
Pull out, and tapered pipeline is installed and is connected to primary cooler gas exit house steward；Hole point is pulled at two and is located at pending primary cooler coal respectively
Before gas outlet conduit valve and at pending primary cooler gas exit total pipeline.
Wherein, fire prevention double-edged fine-toothed comb is the enclosed construction of blind plate or asbestos composition.Nitrogen is sent to desulfurization work with coal gas by air blower
Sequence.
Embodiment
See Fig. 1-Fig. 3, existing recovery operation area uses 5 " transverse tube type " primary coolers in parallel, 5# primary cooler outlet valves
Door falls after stone roller, it is necessary to open bypass, in order to avoid influenceing normally to produce, whole system is negative pressure coal gas system, it is necessary to carry out
Online Water Cutting pulls hole, and concrete operations comprise the following steps：
1) preparation measures before hole are pulled：
◇ 1#~4# primary coolers perform the every 2 days interim cleaning systems for cleaning 1, if detection separate unit primary cooler resistance ＞
0.9kPa, perform the every 1 day system for cleaning 1.For maintaining remaining 4 primary cooler operation to protect production in short term, go out from 5# primary coolers
Mouth is nitrogen purge all the way, pipeline nominal diameter DN50, tolerance 50m3/ h, nitrogen are directly entered coal gas supervisor's net；From traffic pipe
Another way nitrogen purge, pipeline nominal diameter DN25, tolerance 50m are at exhaust stack3/ h, nitrogen are directly entered coal gas supervisor's net；
The 3rd tunnel nitrogen purge, pipeline nominal diameter DN50, tolerance 50m are from 5# primary coolers defective valves to 5# primary cooler bodies in front of the door3/
H, nitrogen diffuse from exhaust stack at the top of primary cooler；
◇ closes 5# primary cooler coal gas exits and entrances valves.Close 5# primary coolers recirculated water, water at low temperature exits and entrances valve.Open
Exhaust stack at the top of 5# primary coolers, nitrogen is passed through to 5# primary cooler bodies, 5# primary coolers gas exit is to 5 primary cooler gas exits
House steward leads to nitrogen, and primary cooler gas exit big traffic pipe is passed through nitrogen, sees Fig. 2.
◇ hypomeres condense and 2 blocks of blind plates are blocked up between liquid bath and hot wash oil square groove, and hot wash oil square groove liquid level of pouring water is not less than
800mm.5 hypomere gas liquor sealing groove peep hole valves are closed, lead to nitrogen to 5 hypomere gas liquor sealing grooves and hypomere condensation liquid bath
Gas, keep pressure-fired (the actual and unmeasured point just pressure value at head, malleation).
◇ pulls hole site gas piping thickness measuring using calibrator to plan, it is ensured that pulls hole site tube wall and is not less than 6mm.
◇ makes DN900, DN1200 pipe nipple and tapered pipeline.DN900, DN1200 gas pipeline valve block up blind plate.
◇, which is pulled, builds fire prevention double-edged fine-toothed comb at hole.
2) hole operation is pulled：
Suction control is in 1.0kPa~1.1kPa before ◇ primary coolers.
◇ welded and installed pipelines DN900 × 10,13m；Pipe laying DN1200 × 10,1.2m；In addition, welding one DN80 pipes
Road, and hole is pulled, the pipeline is arranged on the position marked as 2 below Fig. 1, and hole machine running situation is pulled for testing.
◇ Water Cuttings, which pull hole machine and pull hole operation, to be cut 2 pieces of pipeline outer walls and extracts out, then installs valve and reducing
Communicating pipe.Every 2h does 1 coal gas oxygen content analysis during pulling hole, and exceeded, stopping pulls hole operation and searches reason.Period confirms
Pull in the machine of hole and be full of nitrogen, pressure is not less than 0.4MPa.Water cutter device is shed after pulling between ports valve door and sharpener without negative pressure.Will
Pull the valve that 2 are newly installed at hole to open, stop nitrogen, 5# primary coolers reopen.
◇ is related to whole welding process current controls in below 100A, the striking on new plate, low current operation.During welding,
Weld meat and require full, do not allow the defects of slag inclusion, stomata, undercut, burning occur.
◇ pulls 2 sets of mounting bracket at hole, 2 sets of gas valve support tube, 2 sets of operating platform, to facilitate online assignment.
Coal gas send homophony by three recovery masters during ◇ pulls hole, is dropped as far as possible on the basis of ensuring that two, six coking are not diffused
Suction is stabilized it in 1.0kPa~1.1kPa before low primary cooler.Every 2 hours with 3 electric blower discharge opeings of steam soaking 1 time
Pipe.
The method have the advantages that：
1st, in hole operation is pulled, maximum being a risk that is ignited the coal gas in pipeline during getting angry, and entirely pulls hole process
In in 5# primary coolers body and a few place's key positions of subsidiary pipeline be passed through protection medium nitrogen, holding is pulled in hole pipeline and device and is
Malleation, extraneous air are difficult to enter.It is possible to splash the path of Mars, fundamentally cut-out burning with blind plate or asbestos closing
2 points in " three elements " are oxidizer, burning things which may cause a fire disaster, and then ensure the safety progress of operation.
2nd, pull electric fishing in the operation process of hole to power off, prevent O2The dangerous situation for entering high voltage electric equipment with coal gas occurs,
Nitrogen in electric fishing preceding pipeline is sent to desulfurization process with coal gas by air blower, and next procedure will not be had an impact, and further protects
Card safety.
3rd, drum cooling system important technical parameter contrast before and after operation：(see the table below)
5# primary coolers put into operation again after the completion of pulling hole, and pressure, primary cooler resistance, electric fishing resistance, primary cooler are clear before machine
Frequency sweep rate effectively reduces, and drum cooling working procedure recovers normal operation.
4th, the scope of application：
The operating method is applied to use when negative pressure inflammable gas pipeline specific position failsafe valve can not be changed online.It is special
The recovery of chemical products operation area blasting condensation process of transverse tube/vertical tube primary cooler, electrical tar precipitator Shi Yongyu be equipped with.
5th, economic benefit：
2nd, the average coal resource of six coking is~10 ten thousand m3/ h, by cause to diffuse 4 times, amount of diffusin be coal resource
10%, single diffuse time 8h calculating：1. retrieve 420,000 yuan of gas loss.2. monthly coal resource 7.2 × 107m3When 1R-
Crude tar oil, light benzene, ammonium sulfate average product：5900t, 1850t, 1900t are converted：3. retrieve tar, sulphur ammonium, light benzene loss=13
Wan Yuan.Specifically it see the table below.
To sum up, economic benefit can be created and adds up to 550,000 yuan.
Claims (3)
1. a kind of method that online Water Cutting of negative pressure coal gas system pulls hole, it is characterised in that comprise the following steps：
1) primary cooler is cleaned, separate unit primary cooler resistance is not more than 0.9kPa, for maintaining remaining primary cooler to run in short term
Production is protected, nitrogen purge all the way, tolerance 40-80m are from the outlet of pending primary cooler3/ h, nitrogen are directly entered coal gas supervisor's net, from
Another way nitrogen purge, tolerance 40-80m are at traffic pipe exhaust stack3/ h, nitrogen are directly entered coal gas supervisor's net；From pending
Primary cooler defective valves are the 3rd tunnel nitrogen purge, tolerance 40-80m to pending primary cooler body in front of the door3/ h, nitrogen is from primary cooler
Top exhaust stack diffuses；
2) electrical tar precipitator powers off, and avoids hidden danger caused by air entrance；
3) blind plate is blocked up between hypomere condensation liquid bath and hot wash oil square groove, hot wash oil square groove volume of pouring water is not less than hot wash oil groove solvent
4/5；Hypomere gas liquor sealing groove peep hole valve is closed, leads to nitrogen to hypomere water seal for coal gas groove and hypomere condensation liquid bath；
4) hole site gas piping thickness measuring is pulled to plan using calibrator, it is ensured that pull hole site tube wall average wall thickness and be not less than 6mm；
5) pull and fire prevention double-edged fine-toothed comb is built at hole, and carry out pulling hole operation in fire prevention double-edged fine-toothed comb, distinguish intending pulling raw coal feed channel at hole
Welding pipe nipple simultaneously installs gate valve, and Water Cutting, which pulls hole machine operation and former pipeline outer wall is mutually passed through into iron plate inside region with short knot cut, to be pulled
Go out, and tapered pipeline is installed and is connected to primary cooler gas exit house steward；Hole point is pulled at two and is located at pending primary cooler coal gas respectively
Before outlet conduit valve and at pending primary cooler gas exit total pipeline.
2. the method that a kind of online Water Cutting of negative pressure coal gas system according to claim 1 pulls hole, it is characterised in that described
Fire prevention double-edged fine-toothed comb be blind plate or asbestos composition enclosed construction.
3. the method that a kind of online Water Cutting of negative pressure coal gas system according to claim 1 pulls hole, it is characterised in that described
Nitrogen desulfurization process is sent to by air blower with coal gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711114109.8A CN107723011B (en) | 2017-11-13 | 2017-11-13 | Method for online water cutting of hole-pulling of negative pressure gas system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711114109.8A CN107723011B (en) | 2017-11-13 | 2017-11-13 | Method for online water cutting of hole-pulling of negative pressure gas system |
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| Publication Number | Publication Date |
|---|---|
| CN107723011A true CN107723011A (en) | 2018-02-23 |
| CN107723011B CN107723011B (en) | 2020-09-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998103A (en) * | 2018-08-08 | 2018-12-14 | 鞍钢股份有限公司 | Method and device for improving quality of condensate circulating of horizontal pipe primary cooler |
| CN109732176A (en) * | 2019-01-23 | 2019-05-10 | 宣化钢铁集团有限责任公司 | A kind of cutting blocks the support base and its method of Large Diameter Pipeline gas piping |
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| CN107723011B (en) | 2020-09-01 |
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