CN104607768B - The high anti-corrosion erosion control parts production technology of heater exhaust gas - Google Patents
The high anti-corrosion erosion control parts production technology of heater exhaust gas Download PDFInfo
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- CN104607768B CN104607768B CN201310538066.1A CN201310538066A CN104607768B CN 104607768 B CN104607768 B CN 104607768B CN 201310538066 A CN201310538066 A CN 201310538066A CN 104607768 B CN104607768 B CN 104607768B
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 29
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 15
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 150
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 148
- 239000010936 titanium Substances 0.000 claims abstract description 87
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 87
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000003466 welding Methods 0.000 claims abstract description 80
- 239000007789 gas Substances 0.000 claims abstract description 62
- 239000011148 porous material Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 40
- 229910052786 argon Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 14
- 239000010937 tungsten Substances 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 241001124569 Lycaenidae Species 0.000 claims description 4
- 235000014987 copper Nutrition 0.000 claims description 4
- 210000003041 ligament Anatomy 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- 239000001257 hydrogen Substances 0.000 abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- -1 arc crater Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses the high anti-corrosion erosion control parts production technology of a kind of heater exhaust gas, belong to the welding technology field in equipment manufacture.The gas inlet end of described heater exhaust gas arranges erosion control parts；The gas inlet end of described heater exhaust gas includes titanium tube sheet and titanium heat exchanger tube, and titanium heat exchanger tube penetrates the titanium pore on titanium tube sheet and fixing with titanium tube sheet is connected, and described erosion control parts material is zirconium R60702, including zirconium pipe and zirconium tube sheet；Described zirconium tube sheet screw is fixed on conjunction on titanium tube sheet, then zirconium pipe through the zirconium pore on zirconium tube sheet and is stretched into inside titanium heat exchanger tube, then zirconium tube sheet is welded with zirconium pipe.The present invention adds erosion control parts at gas inlet end, with a small amount of this high-melting-point, there is excellent decay resistance, can consumingly the gas zirconium R60702 such as absorbed nitrogen, hydrogen, oxygen as erosion control parts, it is greatly prolonged titanium material service life, the life and reliability making equipment is greatly improved, significant to increasing economic efficiency.
Description
Technical field:
The present invention relates to the welding technology field in equipment manufacture, be specifically related to a kind of tail gas and add
The high anti-corrosion erosion control parts production technology of hot device.
Background technology:
Constantly start recently as Technologies in Petrochemical Industry PTA project, wherein the tail of production technology
Gas (gas componant is shown in Table 1) processing means is with titanium material heater as capital equipment, this heater
It is a heat transmission equipment in PTA device before exhaust gas processing device, by produce after air reaction
Tail gas heating to 130-180 DEG C, carries out the recovery of pressure energy subsequently into exhaust gas processing device.
In order to improve titanium material service life, adding erosion control parts at gas inlet end, zirconium can be consumingly
The gases such as absorbed nitrogen, hydrogen, oxygen, thus extend the service life of titanium material.Zirconium is similar to titanium, changes
Activity is big, can generate brittle oxide with the gas reaction such as hydrogen, nitrogen, oxygen under high temperature,
Corrosion resisting property is made drastically to decline.Additionally zirconium material fusing point is high, and heat conductivity is little.If copying during welding
The welding of titanium material, often occurs that face of weld is blue defective weld seam.Therefore, welding
Time rational welding conditions, be effectively protected measure, be to ensure that the key of welding quality.
The gas componant of table 1 tail gas
Summary of the invention:
It is an object of the invention to provide the high anti-corrosion erosion control parts of a kind of heater exhaust gas and produce work
Skill.This technique is by the tube sheet the machining of drilling required precision to zirconium material R60702, zirconium material R60702
Weldering before the welding surroundings requirement of cleaning, strict cleaning welding region requirement, use and expand protection
Region, extends the delayed time and work out the technological measures such as rational welding conditions of supplying gas, solves
Face of weld is a blue defective welding technology difficult problem.
The technical scheme is that
The high anti-corrosion erosion control parts production technology of a kind of heater exhaust gas, the tail of described heater exhaust gas
Gas arrival end arranges erosion control parts；The gas inlet end of described heater exhaust gas include titanium tube sheet and
Titanium heat exchanger tube, titanium heat exchanger tube penetrates the titanium pore on titanium tube sheet and fixing with titanium tube sheet is connected, institute
Stating erosion control parts material is zirconium R60702, including zirconium pipe and zirconium tube sheet；Described zirconium tube sheet is used
Screw is fixed on conjunction on titanium tube sheet, then through the zirconium pore on zirconium tube sheet and is stretched into by zirconium pipe
Inside titanium heat exchanger tube, then zirconium tube sheet is welded with zirconium pipe.Described titanium heat exchanger tube and titanium tube sheet
Material be titanium TA2.
Zirconium tube sheet and the seal weld that is welded as of zirconium pipe, use automatic tungsten anode argon arc welding or manual tungsten electrode
Argon arc welding.
Described zirconium tube sheet fits tightly with titanium tube sheet；Described zirconium pipe is concentric with titanium heat exchanger tube, zirconium pipe
Stretch into and have 0.25mm gap between the latter two inside titanium heat exchanger tube；Zirconium pipe on described zirconium tube sheet
Between hole and zirconium pipe, maximal clearance is 0.2mm;1 × 45 ° of slope is fallen at zirconium tube sheet and zirconium sealing of tube
Mouthful；On zirconium tube sheet, the overhang of zirconium pipe is that 1mm(i.e. zirconium pipe stretches into titanium and adds a length of of heat pipe
1mm).
Zirconium tube sheet is taked from melting method with welding of zirconium pipe, and the source of welding current is straight polarity direct current, welding
Process parameter is as follows:
1) when using automatic tungsten anode argon arc welding: use pulse current: peak value 110-120A (base
Value 40A), weldingvoltage 11-13V, speed of welding 120mm/min, shield gas flow rate
12-15L/min;
2) when using GTAW: welding current 100-110A, weldingvoltage
11-13V, speed of welding 80-90mm/min, shield gas flow rate 12-15L/min.
Described protective gas is the argon of purity 99.9995%, nozzle diameter φ 18.
When using automatic tungsten anode argon arc welding, auxiliary jet during welding, after main burner, should be followed, with double
Road gas shield；When using GTAW, process that some red coppers are stifled to be inserted in zirconium pipe；
Often welding 20mm, the while of must stopping 1 minute, nozzle can not leave molten bath.
Described red copper blocks up length 20mm, is 0.25mm with zirconium ligament, inserts distance in zirconium pipe
Tube head distance is 5mm.
Zirconium pore on described zirconium tube sheet uses same numerical control drilling machine with the titanium pore on titanium tube sheet
Processing, it is ensured that zirconium pore and the concentricity of titanium pore, thus ensure that zirconium pipe and titanium add heat pipe
Concentricity；The machining accuracy of numerical control drilling machine ensure that the machining accuracy of pore diameter is less than
0.10mm。
Zirconium tube sheet, zirconium pipe and titanium tube sheet surface and titanium should be added in heat pipe tube head before assembling zirconium tube sheet
25mm length range ethanol or acetone wiped clean.Again by zirconium tube sheet, zirconium pipe before weldering
Once, each stopping was welded more than 4 hours again for 25mm length range ethanol or acetone wiping
Connect and will clear up.Require that all operations is in clean Factory Building.
The invention have the benefit that
1, the present invention adds erosion control parts at gas inlet end, with a small amount of this high-melting-point,
There is excellent decay resistance, can the zirconium R60702 of the gas such as absorbed nitrogen, hydrogen, oxygen consumingly
As erosion control parts, it is greatly prolonged the service life of titanium material.Thus make the life-span of equipment with reliable
Property is greatly improved, significant to increasing economic efficiency.
2, the present invention uses argon tungsten-arc welding, and uses 99.9995% high-purity argon gas shielded,
Make with the gas such as hydrogen, nitrogen, oxygen, chemistry not to occur during the big zirconium R60702 welding of chemical activity
Reaction, it is ensured that welding quality, the silvery white making face of weld color be light.
3, the present invention uses zirconium tube sheet and titanium tube sheet pore to process with same numerical control drilling machine, it is ensured that
Zirconium tube sheet and the concentricity of titanium tube sheet pore, the concentricity of zirconium pipe and titanium pipe；Ensure that processing
Precision, reduces tube and tube plate pipe hold gap and erection stress, gives and provides from molten sealing welding
Quality assurance.
4, the present invention is directed to zirconium material R60702 fusing point high, the feature that heat conductivity is little, propose tight
Lattice are cleared up, and use and expand protection zone, extend the delayed time of supplying gas, work out and reasonably weld rule
The technological measures such as model, solving face of weld is a blue defective welding technology difficult problem.For zirconium
The welding of material R60702 equipment provides experience.
Accompanying drawing illustrates:
Fig. 1 is heater exhaust gas schematic diagram of the present invention.
Fig. 2 is zirconium material R60702 erosion control modular construction schematic diagram of the present invention.
Fig. 3 is that red copper blocks up schematic diagram.
In figure: 1-titanium heat exchanger tube；2-zirconium pipe；3-titanium tube sheet；4-zirconium tube sheet；5-left pipe box；
6-red copper is blocked up.
Detailed description of the invention:
Below in conjunction with the detailed description present invention.
Fig. 1 show heater exhaust gas of the present invention design structure, and left end mouth of pipe N1 is that tail gas enters
At Kou, right-hand member is outlet (omission).Left pipe box 5 is pure titanium, and gas inlet end includes titanium pipe
Plate 3 and titanium heat exchanger tube 1, titanium heat exchanger tube 1 penetrate the titanium pore on titanium tube sheet 3 and with titanium tube sheet
3 fixing connections；Titanium tube sheet 3 and titanium heat exchanger tube 1 are titanium material TA2.
Fig. 2 is the installation diagram (enlarged drawing at A in Fig. 1) of erosion control parts of the present invention.Zirconium material
Before R60702 erosion control parts are placed in left end titanium tube sheet 3.Described erosion control parts include zirconium pipe 2
With zirconium tube sheet 4, assembling process is: first conjunction, zirconium tube sheet 4 screw is fixed on titanium tube sheet 3
Upper (two plate faces are parallel), it is ensured that zirconium tube sheet 4 fits tightly with titanium tube sheet 3, then zirconium pipe 2
Stretch into the internal 1mm of titanium heat exchanger tube 1 through the zirconium pore on zirconium tube sheet 4 simultaneously, then to zirconium tube sheet
4 weld with zirconium pipe 2, are welded as seal weld, use automatic tungsten anode argon arc welding or manual tungsten
Electrode argon arc welding.Described zirconium pipe 2 is concentric with titanium heat exchanger tube 1, on described zirconium tube sheet 4 zirconium pore with
Between zirconium pipe 2, maximal clearance is 0.2mm;Zirconium tube sheet 4 and zirconium pipe 2 weld fall 1 × 45 ° of slope
Mouthful.
4 conjunctions of zirconium tube sheet are fixed on process on titanium tube sheet 3: weld at titanium heat exchanger tube 1 pipe joint
Connect after the assay was approved, first look for 4 points (pore) by it in corner, edge zirconium tube sheet 4 after processing
Being temporarily fixed on titanium tube sheet 3, the pore being adjusted to zirconium tube sheet R60702 and titanium tube sheet 3 is same
Zirconium tube sheet R60702 is fixed on conjunction on titanium tube sheet 3, then at zirconium tube sheet with screw after the heart
Wearing zirconium pipe 2 on 4, zirconium pipe 2 stretches into has 0.25mm gap between the latter two inside titanium heat exchanger tube 1.
Zirconium pore on zirconium tube sheet and the titanium pore on titanium tube sheet use the processing of same numerical control drilling machine,
Ensure the concentricity of zirconium pore and titanium pore, thus ensure that zirconium pipe and titanium add the concentric of heat pipe
Degree；The machining accuracy of numerical control drilling machine ensure that the machining accuracy of pore diameter is less than 0.10mm.
Zirconium tube sheet, zirconium pipe and titanium tube sheet surface and titanium should be added in heat pipe tube head before assembling zirconium tube sheet
25mm length range ethanol or acetone wiped clean.Again by zirconium tube sheet, zirconium pipe before weldering
Once, each stopping was welded more than 4 hours again for 25mm length range ethanol or acetone wiping
Connecing and will clear up, all operations is in clean Factory Building.
Zirconium tube sheet is taked from melting method with welding of zirconium pipe, and the source of welding current is straight polarity direct current, welding
Process parameter is as follows:
1) when using automatic tungsten anode argon arc welding: use pulse current: peak value 110-120A (base
Value 40A), weldingvoltage 11-13V, speed of welding 120mm/min, shield gas flow rate
12-15L/min;
2) when using GTAW: welding current 100-110A, weldingvoltage
11-13V, speed of welding 80-90mm/min, shield gas flow rate 12-15L/min.
Described protective gas is the argon of purity 99.9995%, nozzle diameter φ 18.
When using automatic tungsten anode argon arc welding, auxiliary jet during welding, after main burner, should be followed, with double
Road gas shield；When using GTAW, process some red coppers and block up 6(Fig. 3)
Inserting in zirconium pipe, described red copper blocks up length 20mm, is 0.25mm with zirconium ligament, inserts zirconium pipe
Interior distance tube head distance is 5mm；Often welding 20mm, nozzle can not be from simultaneously must to stop 1 minute
Open molten bath.
In the present invention chemical composition of zirconium material R60702 used be shown in Table 2, table 4, mechanical performance is shown in
Table 3, table 5.
The chemical composition requirement of table 2R60702 zirconium plate
Note: 1, chemical composition is quoted by ingot casting composition；2, nitrogen, hydrogen content are quoted by component analysis.
The condition of delivery of table 3R60702 zirconium plate and mechanical property requirements
Note: manufacture by ASME SB551 technical specification.
Table 4R60702 zirconium pipe chemical composition
The condition of delivery of table 5R60702 zirconium pipe and mechanical property requirements
Note: zirconium pipe by standard-required carry out air seal test, flaring test, by only carrying out ultrasound wave
Carrying out flaw detection, conformance with standard requirement.
Weld characteristics of the present invention:
Zirconium R60702 thermal coefficient of expansion is low, and liquid zirconium mobility is fine, so zirconium R60702
Weldability is good.But zirconium is in 315 DEG C of strong suction hydrogen, 400 DEG C of strong oxygen uptakes, and 800 DEG C strong
Inhale nitrogen；It addition, the impurity such as carbon and silicon easily reacts formation compound with zirconium, make the plasticity of zirconium
Decline with corrosion resistance.When therefore welding, more than 400 DEG C weld zones should have isolation air conservation to arrange
Executing, before the cleaning of welding surroundings and welding, cleaning is the most particularly significant.
Embodiment 1
1, welding condition
After zirconium R60702 tube sheet and zirconium pipe being assembled as shown in Figure 2, use manual tungsten electrode argon
Arc-welding welding；Current polarity: straight polarity direct current；Concrete welding conditions are:
Welding current 110A, weldingvoltage 12V, speed of welding 83mm/min, protective gas
Flow 15mm/min;
2, processed before welding and prepared as follows:
1) 10 red coppers of processing are stifled (such as Fig. 3), and copper blocks up long 20mm, grip handle 6mm；
2) preparing bottled protective gas purity is 99.9995% argon；
3) welding clean environment degree is checked with phenanthroline laboratory method.
4) checking that welding equipment runs and orifice gas mobility is the best, argon arc welding uses
Nozzle diameter φ 18mm.Raising examination welding parameter at waste material, whether test weld is observed postwelding color and is
Silvery white.
5) again clearing up zirconium tube sheet, the effective acetone of zirconium once, red copper is stifled also to clear up.
6) to load distance tube head distance in zirconium pipe R60702 be 5mm by stifled for copper.Copper is stifled plays lining
Torr argon and the dual function in cooling molten bath.
3, Key Points of Welding Technology:
1) weld seam often welds 20mm, and the while of must stopping 1 minute, nozzle can not leave molten bath.
2) copper is stifled should be distributed in by welding tube head and neighbouring, moves to after cooling down along with weld seam
New non-welding position is put.
3) use short arc welding, receive arc arc crater to be filled up.
4) need not preheat before welding, but ambient temperature should be more than 5 DEG C.When the accumulative heat of welding
Make weld zone temperature more than 60 DEG C, welding should be stopped, treating that it cools down；
5) answer subregion symmetrical welding during welding, to avoid accumulation of heat, reduce deformation and reduce
Stress level.
4, touchstone
1) face of weld must not have the defects such as crackle, pore, arc crater, tungsten inclusion.
2) face of weld color is optimal with silvery white, secondly the most slightly yellow still can, other brown,
Blue, canescence is defective.
3) dye penetrant inspection is carried out after above appearance test is qualified.
5, welding application
Utilize the above-mentioned technological measure of the present embodiment, make the welding of zirconium R60702 erosion control parts available
The defects such as flawless, pore, arc crater, tungsten inclusion, surface color is argenteous weld seam.
Result shows, the high anti-corrosion erosion control parts production process of the heater exhaust gas that the present invention relates to
Zirconium R60702 tube sheet the machining of drilling precision controlling, before welding, cleaning and welding process take copper to block up
Supply gas with prolongation the protective measures such as time, solve the problem that zirconium R60702 welded seam becomes blue,
Zirconium material R60702 is valuable rare metal, and the performance of its each side is superior to titanium significantly, it
Apply the service life of the equipment that substantially increases, thus the solution of zirconium material R60702 Welding Problems
Meaning is the most great.
Claims (6)
1. the high anti-corrosion erosion control parts production technology of heater exhaust gas, it is characterised in that: institute
The gas inlet end stating heater exhaust gas arranges erosion control parts；The tail gas of described heater exhaust gas enters
Mouth end includes titanium tube sheet and titanium heat exchanger tube, and titanium heat exchanger tube penetrates the titanium pore on titanium tube sheet and titanium
Tube sheet is fixing to be connected, and described erosion control parts material is zirconium R60702, including zirconium pipe and zirconium tube sheet；
Described zirconium tube sheet screw is fixed on conjunction on titanium tube sheet, then zirconium pipe is passed on zirconium tube sheet
Zirconium pore and stretch into inside titanium heat exchanger tube, then zirconium tube sheet is welded with zirconium pipe, zirconium tube sheet
With the seal weld that is welded as of zirconium pipe, use automatic tungsten anode argon arc welding or GTAW；
Described zirconium tube sheet fits tightly with titanium tube sheet；Described zirconium pipe is concentric with titanium heat exchanger tube, zirconium pipe
Stretch into and have 0.25mm gap between the latter two inside titanium heat exchanger tube；Zirconium pipe on described zirconium tube sheet
Between hole and zirconium pipe, maximal clearance is 0.2mm；1 × 45 ° of slope is fallen at zirconium tube sheet and zirconium sealing of tube
Mouthful；On zirconium tube sheet, the overhang of zirconium pipe is 1mm；
Zirconium tube sheet is taked from melting method with welding of zirconium pipe, and the source of welding current is straight polarity direct current, welding
Process parameter is as follows:
1) when using automatic tungsten anode argon arc welding: use pulse current: peak value 110-120A,
Weldingvoltage 11-13V, speed of welding 120mm/min, shield gas flow rate 12-15L/min；
2) when using GTAW: welding current 100-110A, weldingvoltage
11-13V, speed of welding 80-90mm/min, shield gas flow rate 12-15L/min.
The high anti-corrosion erosion control parts production technology of heater exhaust gas the most according to claim 1,
It is characterized in that: the material of described titanium heat exchanger tube and titanium tube sheet is titanium TA2.
The high anti-corrosion erosion control parts production technology of heater exhaust gas the most according to claim 1,
It is characterized in that: described protective gas is the argon of purity 99.9995%, nozzle diameter φ 18.
The high anti-corrosion erosion control parts production technology of heater exhaust gas the most according to claim 1,
It is characterized in that: when using automatic tungsten anode argon arc welding, secondary spray during welding, after main burner, should be followed
Mouth, uses two-way gas shield；When using GTAW, process that some red coppers are stifled puts
Enter in zirconium pipe；Often welding 20mm, the while of must stopping 1 minute, nozzle can not leave molten bath.
The high anti-corrosion erosion control parts production technology of heater exhaust gas the most according to claim 4,
It is characterized in that: described red copper blocks up length 20mm, be 0.25mm with zirconium ligament, insert zirconium
In pipe, distance tube head distance is 5mm.
The high anti-corrosion erosion control parts production technology of heater exhaust gas the most according to claim 1,
It is characterized in that: the zirconium pore on zirconium tube sheet uses same numerical control drilling with the titanium pore on titanium tube sheet
Bed processing, it is ensured that zirconium pore and the concentricity of titanium pore, thus ensure that zirconium pipe and titanium add heat pipe
Concentricity；The machining accuracy of numerical control drilling machine is less than 0.10mm.
Priority Applications (1)
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| CN201310538066.1A CN104607768B (en) | 2013-11-01 | 2013-11-01 | The high anti-corrosion erosion control parts production technology of heater exhaust gas |
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| CN201310538066.1A CN104607768B (en) | 2013-11-01 | 2013-11-01 | The high anti-corrosion erosion control parts production technology of heater exhaust gas |
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| CN104607768B true CN104607768B (en) | 2016-09-28 |
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Citations (3)
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| CN101968324A (en) * | 2010-09-28 | 2011-02-09 | 中石油东北炼化工程有限公司吉林设计院 | Reaction gas cooler for acrylonitrile device |
| CN102226661A (en) * | 2011-04-01 | 2011-10-26 | 大连海水淡化工程研究中心有限公司 | Thin-wall titanium heat exchange tube and production method |
| CN202382610U (en) * | 2012-05-08 | 2012-08-15 | 沈阳鼓风机集团压力容器有限公司 | Titanium steam heater with tube end protection function |
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| FR2975402B1 (en) * | 2011-05-20 | 2013-05-10 | Constellium France | ALLOYS FOR THERMAL HEAT EXCHANGER TUBE WITH INTERNAL PROTECTIVE VENEER AND WITH BREAKER BREAKER |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968324A (en) * | 2010-09-28 | 2011-02-09 | 中石油东北炼化工程有限公司吉林设计院 | Reaction gas cooler for acrylonitrile device |
| CN102226661A (en) * | 2011-04-01 | 2011-10-26 | 大连海水淡化工程研究中心有限公司 | Thin-wall titanium heat exchange tube and production method |
| CN202382610U (en) * | 2012-05-08 | 2012-08-15 | 沈阳鼓风机集团压力容器有限公司 | Titanium steam heater with tube end protection function |
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