CN105986057A - Replacement method of heated pipe in evaporative cooling flue - Google Patents
Replacement method of heated pipe in evaporative cooling flue Download PDFInfo
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- CN105986057A CN105986057A CN201510043514.XA CN201510043514A CN105986057A CN 105986057 A CN105986057 A CN 105986057A CN 201510043514 A CN201510043514 A CN 201510043514A CN 105986057 A CN105986057 A CN 105986057A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a replacement method of a heated pipe in an evaporative cooling flue, which includes the following steps: 1) firstly, shutting down the furnace, and relieving the pressure of a steam drum and releasing water; 2) cleaning slag in the evaporative cooling flue; 3) determining whether a cracked heated pipe section needs to replace or not; 4) measuring size and drawing mark lines; 5) when water exists in the cracked heated pipe section, cutting the ridges at the two side; 6) cutting the cracked heated pipe section; 7) plugging the opening, which is butt jointed to the lower opening of the cracked heated pipe section, of a heated pipe with an iron plate; 8) punching the bottom of a lower bended pipe to form a washing hole; 9) selecting a new heated pipe section and cutting a window at a position being closed to each of an upper opening and a lower opening of the new heated pipe section; 10) welding the new heated pipe section to the heated pipe and plugging the windows; 11) cleaning the new heated pipe section; 12) plugging the washing hole; 13) filling the new heated pipe section with water; 14) welding the new heated pipe section to adjacent heating pipes by means of ridges; and 15) continuously filling the heated pipe section with water and inspecting leakage situation. The replacement method has high safety.
Description
Technical field
The present invention relates to pneumatic steelmaking equipment, be specifically related to a kind of online replacing options of gasification cooling flue heat pipe.
Background technology
On steelwork converter equipment, gasification cooling flue is one of main corollary equipment of pneumatic steelmaking, the high-temperature flue gas produced when being mainly used in collecting converter smelting the flue-gas temperature reducing high-temperature flue gas.The structure of gasification cooling flue is: include gasification cooling flue body, described gasification cooling flue body is surrounded by some circumferentially spaced heat pipes, between adjacent heat pipe, gap uses rib to seal respectively, the upper orifice of all heat pipes is connected with the vapour endless tube that goes out of connection drum, the lower nozzle of every heat pipe is connected to lower bend pipe, every lower bend pipe is connected with the water inlet manifold being located on gasification cooling flue body by connection straight tube respectively, is provided with blowoff valve on water inlet manifold.In use, after gasification cooling flue is vertically installed on above converter mouth, then cooling water is injected heat pipe from water inlet manifold, the high-temperature flue gas so produced during converter smelting in uphill process can and the cooling water generation heat exchange in heat pipe, and cool down the steam-water mixed steam that water produces after heat exchange and can be passed through drum through entering vapour house steward.Periodicity due to converter smelting, the effect that gasification cooling flue can frequently be expanded with heat and contract with cold, thus cause gasification cooling flue its heat pipe after using certain furnace life to there will be fatigue cracking in various degree, and then generation drainage, bury bigger potential safety hazard for normal production thed bessemerize.And be heated pipeline section for the cracking of heat pipe in gasification cooling flue, at present not by the method that pipeline section is replaced of being heated that ftractures of heat pipe, present stage mainly uses and directly carries out repair welding or the method subsidizing welding at the cracking of the pipeline section that is heated to ftractureing, but repair welding or the weld seam after subsidizing welding easily occur weld cracking or booster phenomenon after converter again blow-on.
Summary of the invention
It is an object of the invention to provide a kind of gasification cooling flue heat pipe replacing options that a kind of safety is high.
For achieving the above object, present invention employs following technical scheme: described a kind of gasification cooling flue heat pipe replacing options, comprise the following steps:
(1) first make converter blowing out, the most again pressure in drum is unloaded to normal pressure and the hot water in drum is bled off；
(2) the most again gasification cooling flue inwall is carried out scarfing cinder；
(3) after cooling stack inwall scarfing cinder to be vaporized, then according to leaking and heat pipe cracking situation judges to have ftractureed and be heated pipeline section the need of being replaced, serious or when having above crackle at 3 on the heat pipe surface of 10cm length when leaking, then judge that this pipeline section that is heated of having ftractureed needs to be replaced；
(4), after the pipeline section that is heated when judging to have ftractureed needs to be replaced, measuring has ftractureed is heated the size of pipeline section, and ftracture be heated pipeline section size positions at draw mark line and lower mark line respectively；
(5) when the heat pipe section that ftractures is positioned at the lower section of blowoff valve, first opening blowoff valve, then cutting off with cutting machine ftractures is heated the rib of pipeline section both sides；When the pipeline section that is heated when ftractureing has part be positioned at the top of blowoff valve or be entirely located in the top of blowoff valve, first use cutting machine to cut off the rib of pipeline section both sides of being heated that ftractures, open blowoff valve the most again；
(6) then with cutter alignment lower mark line cutting heat pipe, until being heated ftractureing, the lower nozzle of pipeline section is separated with the heat pipe at place, it is heated after the lower nozzle of pipeline section flows to end from ftractureing wait the hot water being positioned in the heat pipe above lower mark line, again with cutter alignment upper mark line cutting heat pipe, until the pipeline section that is heated ftractureing excises from heat pipe；
(7) then will block with the mouth of pipe that the lower nozzle of pipeline section docks mutually that is heated of ftractureing on heat pipe with iron plate；
(8) then excise ftracture be heated pipeline section heat pipe lower bend pipe bottom offer flushing hole；
(9) then select and the pipeline section that is newly heated of pipeline section consistent size of being heated that ftractureed, and offer skylight at the nearly upper orifice of this pipeline section that is newly heated, at the nearly lower nozzle of this pipeline section that is newly heated, offer lower skylight；
(10) then the pipeline section that is newly heated is put in heat pipe and replaces the cracking excised and be heated pipeline section, and upper orifice and the lower nozzle of the pipeline section that is newly heated are docked mutually with heat pipe respectively, then DC welder is stretched into, from upper skylight, the pipeline section that is newly heated, then heat pipe interfaced for the upper orifice of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of upper skylight；The most again DC welder is stretched into, from lower skylight, the pipeline section that is newly heated, then heat pipe interfaced for the lower nozzle of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of lower skylight；
(11) after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 15-25 minute, water flowing in heat pipe the most again, the impurity such as the welding slag in heat pipe are washed away from flushing hole；
(12), after rinsing in the heat pipe having the pipeline section that is newly heated to be replaced, re-use DC welder and closure is welded in the flushing hole bottom lower bend pipe；
(13) until lower bend pipe flushing hole weld closure after 9-11 minute, to replacing water flowing in the heat pipe of pipeline section that is newly heated, be filled with water until having changed in the heat pipe of pipeline section that is newly heated；
(14) gap rib welding closure between the heat pipe that the pipeline section that is newly heated is adjacent by DC welder is then re-used；
(15) then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 400mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
Further, aforesaid a kind of gasification cooling flue heat pipe replacing options, wherein: when the upper orifice of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, this weld seam is tapped two to three times with hammer, when the lower nozzle of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer.
Further, aforesaid a kind of gasification cooling flue heat pipe replacing options, wherein: use room for manoeuvre welding method by rib segmentation and the both sides being welded in the pipeline section that is newly heated symmetrically, after every section of rib welds mutually with adjacent heat pipe, tap this section of weld seam two to three times with hammer.
Further, aforesaid a kind of gasification cooling flue heat pipe replacing options, wherein: after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 20 minutes, the outer surface of the pipeline section that is newly heated is rinsed again, until the cleaning of outer surface of the pipeline section that is newly heated is clean with water；
Further, aforesaid a kind of gasification cooling flue heat pipe replacing options, wherein: after closure is welded in the flushing hole of lower bend pipe 10 minutes, to changing water flowing in the heat pipe of pipeline section that is newly heated, it is filled with water until having changed in the heat pipe of pipeline section that is newly heated；
Further, aforesaid a kind of gasification cooling flue heat pipe replacing options, wherein: then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 400mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
By the enforcement of technique scheme, the invention has the beneficial effects as follows: simple to operate, safe to use, the pipeline section that can be heated the cracking of heat pipe in gasification cooling flue is replaced, and the heat pipe after replacing does not haves weld cracking or booster phenomenon after converter again blow-on.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one
Described a kind of gasification cooling flue heat pipe replacing options, comprises the following steps:
(1) first make converter blowing out, the most again pressure in drum is unloaded to normal pressure and the hot water in drum is bled off；
(2) the most again gasification cooling flue inwall being carried out scarfing cinder, when scarfing cinder, maintainer prepares to overhaul spare part in advance；
(3) after cooling stack inwall scarfing cinder to be vaporized, then according to leaking and heat pipe cracking situation judges to have ftractureed and be heated pipeline section the need of being replaced, serious or when having above crackle at 3 on the heat pipe surface of 10cm length when leaking, then judge that this pipeline section that is heated of having ftractureed needs to be replaced；
(4), after the pipeline section that is heated when judging to have ftractureed needs to be replaced, measuring has ftractureed is heated the size of pipeline section, and ftracture be heated pipeline section size positions at draw mark line and lower mark line respectively；
(5) when the heat pipe section that ftractures is positioned at the lower section of blowoff valve, first open blowoff valve, then cutting off with cutting machine ftractures is heated the rib of pipeline section both sides, because owing to the heat pipe section that ftractures is positioned at the lower section of blowoff valve, after blowoff valve is opened, it is positioned under external and internal pressure effect in the pipeline section that is heated below blowoff valve and has water, it is ensured that cut off rib when ftractureing and being heated in pipeline section and have water, thus alleviate the deflection of heat pipe in rib cutting process；When the pipeline section that is heated when ftractureing has part be positioned at the top of blowoff valve or be entirely located in the top of blowoff valve, cutting machine is first used to cut off the rib of pipeline section both sides of being heated that ftractures, open blowoff valve the most again, so also ensure that and cut off rib when ftractureing and being heated in pipeline section and have water, thus alleviate the deflection of heat pipe in rib cutting process；
(6) then with cutter alignment lower mark line cutting heat pipe, until being heated ftractureing, the lower nozzle of pipeline section is separated with the heat pipe at place, it is heated after the lower nozzle of pipeline section flows to end from ftractureing wait the hot water being positioned in the heat pipe above lower mark line, again with cutter alignment upper mark line cutting heat pipe, until the pipeline section that is heated ftractureing excises from heat pipe；
(7) then will block with the mouth of pipe that the lower nozzle of pipeline section docks mutually that is heated of ftractureing on heat pipe with iron plate, it is to avoid foreign material enter from this mouth of pipe and block heat pipe；
(8) then excise ftracture be heated pipeline section heat pipe lower bend pipe bottom offer flushing hole；
(9) then select and the pipeline section that is newly heated of pipeline section consistent size of being heated that ftractureed, and offer skylight at the nearly upper orifice of this pipeline section that is newly heated, at the nearly lower nozzle of this pipeline section that is newly heated, offer lower skylight；
(10) then the pipeline section that is newly heated is put in heat pipe and replaces the cracking excised and be heated pipeline section, and upper orifice and the lower nozzle of the pipeline section that is newly heated are docked mutually with heat pipe respectively, then DC welder is stretched into, from upper skylight, the pipeline section that is newly heated, then heat pipe interfaced for the upper orifice of the pipeline section that is newly heated is welded mutually, when the upper orifice of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；The most again by the welding closure of upper skylight；The most again DC welder is stretched into, from lower skylight, the pipeline section that is newly heated, then heat pipe interfaced for the lower nozzle of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of lower skylight, when the lower nozzle of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；
(11) after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 20 minutes, water flowing in heat pipe the most again, the impurity such as the welding slag in heat pipe are washed away from flushing hole；
(12), after rinsing in the heat pipe having the pipeline section that is newly heated to be replaced, re-use DC welder and closure is welded in the flushing hole bottom lower bend pipe；
(13) until lower bend pipe flushing hole weld closure after 10 minutes, to replacing water flowing in the heat pipe of pipeline section that is newly heated, be filled with water until having changed in the heat pipe of pipeline section that is newly heated；
(14) then use room for manoeuvre welding method by using DC welder by rib segmentation and the both sides being welded in the pipeline section that is newly heated symmetrically, after every section of rib welds mutually with adjacent heat pipe, tap this section of weld seam two to three times with hammer；
(15) then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 400mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
Embodiment two
Described a kind of gasification cooling flue heat pipe replacing options, comprises the following steps:
(1) first make converter blowing out, the most again pressure in drum is unloaded to normal pressure and the hot water in drum is bled off；
(2) the most again gasification cooling flue inwall is carried out scarfing cinder；
(3) after cooling stack inwall scarfing cinder to be vaporized, then according to leaking and heat pipe cracking situation judges to have ftractureed and be heated pipeline section the need of being replaced, serious or when having above crackle at 3 on the heat pipe surface of 10cm length when leaking, then judge that this pipeline section that is heated of having ftractureed needs to be replaced；
(4), after the pipeline section that is heated when judging to have ftractureed needs to be replaced, measuring has ftractureed is heated the size of pipeline section, and ftracture be heated pipeline section size positions at draw mark line and lower mark line respectively；
(5) when the heat pipe section that ftractures is positioned at the lower section of blowoff valve, first opening blowoff valve, then cutting off with cutting machine ftractures is heated the rib of pipeline section both sides；When the pipeline section that is heated when ftractureing has part be positioned at the top of blowoff valve or be entirely located in the top of blowoff valve, first use cutting machine to cut off the rib of pipeline section both sides of being heated that ftractures, open blowoff valve the most again；
(6) then with cutter alignment lower mark line cutting heat pipe, until being heated ftractureing, the lower nozzle of pipeline section is separated with the heat pipe at place, it is heated after the lower nozzle of pipeline section flows to end from ftractureing wait the hot water being positioned in the heat pipe above lower mark line, again will be with cutter alignment upper mark line cutting heat pipe, until the pipeline section that is heated ftractureing excises from heat pipe；
(7) then will block with the mouth of pipe that the lower nozzle of pipeline section docks mutually that is heated of ftractureing on heat pipe with iron plate；
(8) then excise ftracture be heated pipeline section heat pipe lower bend pipe bottom offer flushing hole；
(9) then select and the pipeline section that is newly heated of pipeline section consistent size of being heated that ftractureed, and offer skylight at the nearly upper orifice of this pipeline section that is newly heated, at the nearly lower nozzle of this pipeline section that is newly heated, offer lower skylight；
(10) then the pipeline section that is newly heated is put in heat pipe and replaces the cracking excised and be heated pipeline section, and upper orifice and the lower nozzle of the pipeline section that is newly heated are docked mutually with heat pipe respectively, then DC welder is stretched into, from upper skylight, the pipeline section that is newly heated, then heat pipe interfaced for the upper orifice of the pipeline section that is newly heated is welded mutually, when the upper orifice of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；The most again by the welding closure of upper skylight；The most again DC welder is stretched into, from lower skylight, the pipeline section that is newly heated, then heat pipe interfaced for the lower nozzle of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of lower skylight, when the lower nozzle of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；
(11) after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 15 minutes, water flowing in heat pipe the most again, the impurity such as the welding slag in heat pipe are washed away from flushing hole；
(12), after rinsing in the heat pipe having the pipeline section that is newly heated to be replaced, re-use DC welder and closure is welded in the flushing hole bottom lower bend pipe；
(13) until lower bend pipe flushing hole weld closure after 9 minutes, to replacing water flowing in the heat pipe of pipeline section that is newly heated, be filled with water until having changed in the heat pipe of pipeline section that is newly heated；
(14) then use room for manoeuvre welding method by using DC welder by rib segmentation and the both sides being welded in the pipeline section that is newly heated symmetrically, after every section of rib welds mutually with adjacent heat pipe, tap this section of weld seam two to three times with hammer；
(15) then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 390mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
Embodiment three
Described a kind of gasification cooling flue heat pipe replacing options, comprises the following steps:
(1) first make converter blowing out, the most again pressure in drum is unloaded to normal pressure and the hot water in drum is bled off；
(2) the most again gasification cooling flue inwall is carried out scarfing cinder；
(3) after cooling stack inwall scarfing cinder to be vaporized, then according to leaking and heat pipe cracking situation judges to have ftractureed and be heated pipeline section the need of being replaced, serious or when having above crackle at 3 on the heat pipe surface of 10cm length when leaking, then judge that this pipeline section that is heated of having ftractureed needs to be replaced；
(4), after the pipeline section that is heated when judging to have ftractureed needs to be replaced, measuring has ftractureed is heated the size of pipeline section, and ftracture be heated pipeline section size positions at draw mark line and lower mark line respectively；
(5) when the heat pipe section that ftractures is positioned at the lower section of blowoff valve, first opening blowoff valve, then cutting off with cutting machine ftractures is heated the rib of pipeline section both sides；When the pipeline section that is heated when ftractureing has part be positioned at the top of blowoff valve or be entirely located in the top of blowoff valve, first use cutting machine to cut off the rib of pipeline section both sides of being heated that ftractures, open blowoff valve the most again；
(6) then with cutter alignment lower mark line cutting heat pipe, until being heated ftractureing, the lower nozzle of pipeline section is separated with the heat pipe at place, it is heated after the lower nozzle of pipeline section flows to end from ftractureing wait the hot water being positioned in the heat pipe above lower mark line, again with cutter alignment upper mark line cutting heat pipe, until the pipeline section that is heated ftractureing excises from heat pipe；
(7) then will block with the mouth of pipe that the lower nozzle of pipeline section docks mutually that is heated of ftractureing on heat pipe with iron plate；
(8) then excise ftracture be heated pipeline section heat pipe lower bend pipe bottom offer flushing hole；
(9) then select and the pipeline section that is newly heated of pipeline section consistent size of being heated that ftractureed, and offer skylight at the nearly upper orifice of this pipeline section that is newly heated, at the nearly lower nozzle of this pipeline section that is newly heated, offer lower skylight；
(10) then the pipeline section that is newly heated is put in heat pipe and replaces the cracking excised and be heated pipeline section, and upper orifice and the lower nozzle of the pipeline section that is newly heated are docked mutually with heat pipe respectively, then DC welder is stretched into, from upper skylight, the pipeline section that is newly heated, then heat pipe interfaced for the upper orifice of the pipeline section that is newly heated is welded mutually, when the upper orifice of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；The most again by the welding closure of upper skylight；The most again DC welder is stretched into, from lower skylight, the pipeline section that is newly heated, then heat pipe interfaced for the lower nozzle of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of lower skylight, when the lower nozzle of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer；
(11) after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 25 minutes, water flowing in heat pipe the most again, the impurity such as the welding slag in heat pipe are washed away from flushing hole；
(12), after rinsing in the heat pipe having the pipeline section that is newly heated to be replaced, re-use DC welder and closure is welded in the flushing hole bottom lower bend pipe；
(13) until lower bend pipe flushing hole weld closure after 11 minutes, to replacing water flowing in the heat pipe of pipeline section that is newly heated, be filled with water until having changed in the heat pipe of pipeline section that is newly heated；
(14) then use room for manoeuvre welding method by using DC welder by rib segmentation and the both sides being welded in the pipeline section that is newly heated symmetrically, after every section of rib welds mutually with adjacent heat pipe, tap this section of weld seam two to three times with hammer；
(15) then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 410mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
The invention have the advantage that simple to operate, safe to use, the pipeline section that can be heated the cracking of heat pipe in gasification cooling flue is replaced, and the heat pipe after replacing does not haves weld cracking or booster phenomenon after converter again blow-on.
Claims (6)
1. a gasification cooling flue heat pipe replacing options, it is characterised in that: comprise the following steps:
(1) first make converter blowing out, the most again pressure in drum is unloaded to normal pressure and the hot water in drum is bled off；
(2) the most again gasification cooling flue inwall is carried out scarfing cinder；
(3) after cooling stack inwall scarfing cinder to be vaporized, then according to leaking and heat pipe cracking situation judges to have ftractureed and be heated pipeline section the need of being replaced, serious or when having above crackle at 3 on the heat pipe surface of 10cm length when leaking, then judge that this pipeline section that is heated of having ftractureed needs to be replaced；
(4), after the pipeline section that is heated when judging to have ftractureed needs to be replaced, measuring has ftractureed is heated the size of pipeline section, and ftracture be heated pipeline section size positions at draw mark line and lower mark line respectively；
(5) when the heat pipe section that ftractures is positioned at the lower section of blowoff valve, first opening blowoff valve, then cutting off with cutting machine ftractures is heated the rib of pipeline section both sides；When the pipeline section that is heated when ftractureing has part be positioned at the top of blowoff valve or be entirely located in the top of blowoff valve, first use cutting machine to cut off the rib of pipeline section both sides of being heated that ftractures, open blowoff valve the most again；
(6) then with cutter alignment lower mark line cutting heat pipe, until being heated ftractureing, the lower nozzle of pipeline section is separated with the heat pipe at place, it is heated after the lower nozzle of pipeline section flows to end from ftractureing wait the hot water being positioned in the heat pipe above lower mark line, again with cutter alignment upper mark line cutting heat pipe, until the pipeline section that is heated ftractureing excises from heat pipe；
(7) then will block with the mouth of pipe that the lower nozzle of pipeline section docks mutually that is heated of ftractureing on heat pipe with iron plate；
(8) then excise ftracture be heated pipeline section heat pipe lower bend pipe bottom offer flushing hole；
(9) then select and the pipeline section that is newly heated of pipeline section consistent size of being heated that ftractureed, and offer skylight at the nearly upper orifice of this pipeline section that is newly heated, at the nearly lower nozzle of this pipeline section that is newly heated, offer lower skylight；
(10) then the pipeline section that is newly heated is put in heat pipe and replaces the cracking excised and be heated pipeline section, and upper orifice and the lower nozzle of the pipeline section that is newly heated are docked mutually with heat pipe respectively, then DC welder is stretched into, from upper skylight, the pipeline section that is newly heated, then heat pipe interfaced for the upper orifice of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of upper skylight；The most again DC welder is stretched into, from lower skylight, the pipeline section that is newly heated, then heat pipe interfaced for the lower nozzle of the pipeline section that is newly heated is welded mutually, the most again by the welding closure of lower skylight；
(11) after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 15-25 minute, water flowing in heat pipe the most again, the impurity such as the welding slag in heat pipe are washed away from flushing hole；
(12), after rinsing in the heat pipe having the pipeline section that is newly heated to be replaced, re-use DC welder and closure is welded in the flushing hole bottom lower bend pipe；(13) until lower bend pipe flushing hole weld closure after 9-11 minute, to replacing water flowing in the heat pipe of pipeline section that is newly heated, be filled with water until having changed in the heat pipe of pipeline section that is newly heated；
(14) gap rib welding closure between the heat pipe that the pipeline section that is newly heated is adjacent by DC welder is then re-used；
(15) then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 390-410mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
A kind of gasification cooling flue heat pipe replacing options the most according to claim 1, it is characterized in that: when the upper orifice of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, this weld seam is tapped two to three times with hammer, when the lower nozzle of the pipeline section that is newly heated is heated after the heat pipe of pipeline section welds mutually with excising to ftracture, tap this weld seam two to three times with hammer.
A kind of gasification cooling flue heat pipe replacing options the most according to claim 1, it is characterized in that: use room for manoeuvre welding method by rib segmentation and the both sides being welded in the pipeline section that is newly heated symmetrically, after every section of rib welds mutually with adjacent heat pipe, tap this section of weld seam two to three times with hammer.
A kind of gasification cooling flue heat pipe replacing options the most according to claim 1, it is characterized in that: after the pipeline section that is newly heated is weldingly fixed on that excising ftractures and is heated the heat pipe of pipeline section, first place cooling 20 minutes, the outer surface of the pipeline section that is newly heated is rinsed again, until the cleaning of outer surface of the pipeline section that is newly heated is clean with water.
A kind of gasification cooling flue heat pipe replacing options the most according to claim 1, it is characterized in that: until lower bend pipe flushing hole weld closure after 10 minutes, to changing water flowing in the heat pipe of pipeline section that is newly heated, it is filled with water until having changed in the heat pipe of pipeline section that is newly heated.
A kind of gasification cooling flue heat pipe replacing options the most according to claim 1, it is characterized in that: then continue to changing water flowing in the heat pipe of pipeline section that is newly heated, treat that liquid level of steam drum reaches 400mm, and observe the leakage scenarios of weld seam between the heat pipe that the pipeline section that is newly heated welds with its phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510043514.XA CN105986057B (en) | 2015-01-29 | 2015-01-29 | A kind of gasification cooling flue heat pipe replacing options |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510043514.XA CN105986057B (en) | 2015-01-29 | 2015-01-29 | A kind of gasification cooling flue heat pipe replacing options |
Publications (2)
| Publication Number | Publication Date |
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| CN105986057A true CN105986057A (en) | 2016-10-05 |
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| CN108817841A (en) * | 2018-07-17 | 2018-11-16 | 迁安首钢设备结构有限公司 | Mammoth conveter waste heat boiler evaporated flue uses later period maintenance, local replacing technique |
| CN113414543A (en) * | 2021-08-04 | 2021-09-21 | 广东韶钢松山股份有限公司 | Method for quickly replacing heating pipe of array type converter waste heat boiler and arc-shaped clamp |
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| CN113414543B (en) * | 2021-08-04 | 2022-06-21 | 广东韶钢松山股份有限公司 | Method for quickly replacing heating pipe of array type converter waste heat boiler and arc-shaped clamp |
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| CN105986057B (en) | 2017-10-20 |
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Effective date of registration: 20190710 Address after: 215600 Yonglian Village, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: Lian Feng Steel (Zhangjiagang) Co., Ltd. Address before: 215628 Yonglian Jiangsu Yonggang Group Co., Ltd., Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: Jiangsu Yonggang Group Co., Ltd. |