CN110386603A - A kind of carbide furnace cooling device and assemble method - Google Patents
A kind of carbide furnace cooling device and assemble method Download PDFInfo
- Publication number
- CN110386603A CN110386603A CN201910553253.4A CN201910553253A CN110386603A CN 110386603 A CN110386603 A CN 110386603A CN 201910553253 A CN201910553253 A CN 201910553253A CN 110386603 A CN110386603 A CN 110386603A
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- Prior art keywords
- tube
- cooling
- boiler tube
- carbide furnace
- boiler
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/949—Tungsten or molybdenum carbides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The present invention provides a kind of carbide furnace cooling device and assemble method, and the boiler tube and carbide furnace go out the connection of boat mouth, and packet further includes cooling tube, and it is outer and thermally contact with boiler tube that the cooling tube circumferential disc is around in the boiler tube.When assembling, the cooling tube circumferential disc after preheating is around in outer surface of furnace tube, winding while welds cooling tube and boiler tube, in welding process, carries out cooling down to boiler tube；After the completion of winding welding, cooling tube natural cooling.Carbide furnace cooling device provided by the invention, when use, cooling water is continually fed into cooling tube, just enter boiler tube from the high temperature boat that carbide furnace heating zone comes out and contacted with boiler tube bottom, the cooling water inside the cooled pipe of heat is taken away, to the more capable quick cooling of boat and be fully cooled, in cooling procedure, there are the larger temperature difference for boiler tube inside and outside wall, to generate tensile stress in furnace tube outer wall, the tensile stress that the compressive pre-stress that cooling tube generates generates furnace tube outer wall is offset.
Description
Technical field
The invention belongs to powder metallurgical technologies, and in particular to a kind of carbide furnace cooling device and assemble method.
Background technique
The carbide furnace that tungsten carbide uses push plate furnace structure is produced, needs first to be packed into raw material (mixture of tungsten powder and carbon black)
Then graphite boat will be heated to 1400 DEG C or more in the graphite boat push-in carbide furnace of tandem and carburizing reagent, reaction life occur
At tungsten carbide products and boat (hereinafter referred to as boat) need to be cooled to room temperature together just and can come out of the stove, usually carbide furnace plus
Hot-zone is connected a dedicated cooling device of boat, and when high temperature boat passes through the cooling device, cooling device is by the warm of boat
Amount is taken away, to realize that higher carbonization productivity may be implemented in faster boat cooling rate, cold to the fast cooling of boat
But the capacity of heat transmission of device is an important factor for influencing boat cooling rate.
For the carbide furnace cooling device generallyd use in industry as shown in Figure of description 1, the front end of boiler tube 1 passes through flange 3
It is connect with carbide furnace heating zone, the rear end of boiler tube is boat mouth, and coolant jacket 5 is arranged outside boiler tube 1 and forms collet water-cooling structure, such as
Shown in Figure of description 2, water inlet is arranged in the rear end lower of coolant jacket 5, as shown in Figure of description 3, on the front end of coolant jacket 5
Water outlet is arranged in portion, after the powder in graphite boat 4 carries out high temperature sintering in carbide furnace, into boiler tube 1 in and from boiler tube 1
Front end is transmitted to the back-end, is persistently filled with cooling water into coolant jacket 5 by water inlet, cooling water full of coolant jacket 5 and boiler tube 1 it
Between collet after from discharge outlet 32 overflow, to be cooled down to the boat 4 in boiler tube 1.This structure is asked of both existing
Topic；First problem is that cooling velocity is slow, and takeing a long time can just make boat 4 cooling sufficiently, this just needs length dimension
King-sized cooling device causes it acutely to avoid the high temperature boat 4 just come out from heating zone directly contact 1 bottom of boiler tube
Thermal deformation, need in 1 Inner Front End liner corundum furnace tube 6 of boiler tube, and 6 bottom of corundum furnace tube setting heat-barrier material made of silicic acid
Aluminum fiber folds block 7, and the heat-barrier material of low thermal conductivity reduces heat transfer cooling velocity, and the needs of boat 4 stop longer in boiler tube 1
Time can just be fully cooled, it is enough come the cooling time for guaranteeing boat 4 with the length of coolant jacket 5 that this needs to extend boiler tube 1, when
When transmission speed of the boat 4 in boiler tube is faster, the length of boiler tube 1 and coolant jacket 5 then needs longer, takes up a large area, and needs
The workshop of large span can be just mounted so as to down.Second Problem is that 1 service life of boiler tube is short, fatigue cracking leak is easy, in order to press
Contracting carbide furnace length dimension, the length that alumina silicate fibre folds the slow cooling section that block 7 and corundum furnace tube 6 form is shorter, and boat 4 directly connects
Temperature is usually also at 700 DEG C or more when contacting 1 metal inner surface of boiler tube, when the metal inner surface that red-hot boat 4 touches boiler tube 1 draws
When playing localized hyperthermia, since the operative temperature of recirculated cooling water is lower, the inside and outside wall of boiler tube 1 exists for the outer wall of corresponding position boiler tube 1
The biggish temperature difference will form thermal stress, and 1 inner wall side of boiler tube generates compression, and outer wall side generates tensile stress, and interval is logical one by one for boat 4
When apparatus for supercooling, boiler tube 1 bears the thermal stress of ringing, and under long-term cyclic thermal stres effect, 1 surface of boiler tube will
It generates fatigue cracking to destroy, will result in 5 leak of boiler tube when crack is gradually expanded, water, which is leak into boiler tube 1, meets red-hot carbon black
The boat 4 of material, which will react rapidly, generates water-gas (H2+CO), causes 4 non-normal consumption of graphite boat, initial stage a small amount of leakage
Water operative employee cannot be had found by cooling device appearance, often due to leak is serious so that moment generates a large amount of combustible gas in furnace
Body and occur explosion just rule of thumb speculate cooling device occur in leakage, therefore common jacket type cooling device safety is poor.
Summary of the invention
Based on problem above, the purpose of the present invention is to provide a kind of carbide furnace cooling device, with long service life,
The advantages of cooling velocity is fast, low manufacture cost.
In order to achieve the goal above, the technical solution adopted by the present invention are as follows: a kind of carbide furnace cooling device, including boiler tube,
The front end of the boiler tube and the heating zone of carbide furnace connect, and it further includes cooling tube that the rear end of boiler tube, which is boat mouth, the cooling tube
Circumferential disc is around in outside the boiler tube and thermally contacts with boiler tube.
Carbide furnace cooling device provided by the invention, in use, cooling tube is close to the open at one end as water inlet of carbide furnace
Mouthful, it is open at one end as water outlet far from carbide furnace, it is continually fed into cooling water into cooling tube, just goes out from carbide furnace heating zone
The high temperature boat come enters boiler tube and contacts with boiler tube bottom, and heat passes to cooling tube by furnace tube outer wall, and heat is cooled
Cooling water inside pipe is taken away, thus to boat more it is capable it is quick cooling and be fully cooled, in cooling procedure, touched just
When red-hot boat, there are the larger temperature difference for boiler tube inside and outside wall, so that furnace tube outer wall generates the tensile stress for be easy to causeing crackle,
But due to the presence for the compressive pre-stress that cooling tube generates, the tensile stress that furnace tube outer wall generates can be applied contrary precompressed and answer
Power is offset.
The assemble method of above-mentioned carbide furnace cooling device provided by the present invention, comprising the following steps:
Step 1, preheating: cooling tube is subjected to heating preheating；
Step 2, winding welding: being around in outer surface of furnace tube for the cooling tube circumferential disc after preheating, and winding while will cool down
Pipe is welded with boiler tube, in welding process, carries out cooling down to boiler tube；
Step 3, cooling: after the completion of winding welding, cooling tube natural cooling.
Specifically, using cooling tube for metal tube in the step 1, preheating temperature is 600~650 DEG C.
Specifically, cooling water is passed through in the step 2 inside boiler tube to carry out cooling down to boiler tube
Assemble method provided by the invention, first preheats cooling tube, generates the tube body of cooling tube a degree of
Expansion；Then the cooling tube circumferential disc of preheating being around in outer surface of furnace tube, winding while, welds cooling tube and boiler tube,
In welding process, cooling down is carried out to boiler tube, guarantee furnace wall will not occur because of the transfer of the heat of cooling tube and cooling tube
Thermal expansion in the same direction；After the completion of winding welding, it is bonded in the cooling tube natural cooling process of boiler tube and shrinks and squeeze boiler tube,
To form a radially inward compressive pre-stress to boiler tube, this compressive pre-stress becomes natural stress after finishing assembly and begins
It is present in furnace wall eventually.It is equal to the wall thickness for increasing boiler tube after boiler tube and cooling tube are integrally welded, also because of compressive pre-stress
And the mechanical strength of boiler tube is improved, the thermal shock of boat bring circulation is not easy that boiler tube is made to generate deformation and destruction, thus
Cooling device is set to have stronger anti-cyclic thermal stres impact capacity.
Optimization, the boiler tube is that cross section is rectangular, the corner setting chamfering of the boiler tube, further, described
Transition arc is arranged in the chamfering that chamfering is 40~60 °, preferably 45 ° of chamfering, further, the edge of the chamfering；It is logical
It crosses setting chamfering and arc transition is handled, dispersed stress direction, while facilitating the winding construction of cooling tube, keep this cold
But device is very easy to be successful.
The front end of the specific boiler tube is connected by the heating zone of flange and carbide furnace.
The invention has the benefit that
(1), carbide furnace cooling device provided by the invention, cooling tube circumferential disc is around in outside boiler tube, cooling tube is to furnace
The compressive pre-stress of pipe offsets the thermal stress for having destruction to boiler tube, simultaneously because the wall thickness humidification of cooling tube, makes
The service life is longer for carbide furnace cooling device.At 1550 DEG C of carbide furnace heating temperature, under the operating condition for pushing away fast 8 minutes/boat, common carbon
Change the boiler tube length that furnace cooling device needs to be arranged 4 meters, service life does not exceed 1 year, using carbide furnace provided by the invention
Cooling device only needs 2.6 meters of length, and the continuous work service life at 3 years or more, both reduces carbide furnace cooling device to the need in space
It asks, and improves the service life of carbide furnace cooling device.In particular, boiler tube and cooling tube are thermally conductive good metal material
Material can take away rapidly the heat of boat, shorten cooling time, only need the cooling device of shorter size that boat can be made to obtain sufficiently
It is cooling.
(2), the cooling tube circumferential disc of preheating is around in boiler tube by the assemble method of carbide furnace cooling device provided by the invention
Outer surface, winding while, weld cooling tube and boiler tube, in welding process, carry out cooling down to boiler tube, guarantee furnace
Tube wall will not occur to be bonded boiler tube after the completion of winding welding with cooling tube thermal expansion in the same direction because the heat of cooling tube shifts
Cooling tube natural cooling process in shrink and squeeze boiler tube, thus to boiler tube formed a radially inward precompressed answer
Power, this compressive pre-stress become natural stress after finishing assembly and are present in furnace wall always；Boiler tube and cooling tube weld
It is equal to the wall thickness for increasing boiler tube after integral, the mechanical strength of boiler tube, boat bring is also improved because of compressive pre-stress
The thermal shock of circulation is not easy that boiler tube is made to generate deformation and destruction, so that cooling device be made to have stronger anti-cyclic thermal stres punching
Hit ability.
(3), carbide furnace cooling device provided by the invention, structure is simple, and processing and fabricating cost is low.Common jacket formula is cooling
Apparatus structure is complicated, and size is larger, is made of multiple material, and the corundum furnace tube of slow cooling section, which needs to be formed, to be fired, so that it is made
Make higher cost, unit price needs 2.5 ten thousand yuan, and cooling device material consumption provided by the invention is less, and description of materials is single, unit price
Only need 0.65 ten thousand yuan.
Detailed description of the invention
Fig. 1 is the schematic diagram of carbide furnace cooling device in the prior art；
Fig. 2 is A-A screenshot in Fig. 1；
Fig. 3 is B-B screenshot in Fig. 1；
Fig. 4 is the schematic diagram for the carbide furnace cooling device that invention provides；
Fig. 5 is C-C screenshot in Fig. 4；
Wherein, 1 is boiler tube, and 2 be cooling tube, and 21 be water inlet, and 22 be water outlet, and 3 be flange, and 4 be boat, and 5 be cooling
Set, 6 be corundum furnace tube, and 7 be folded block.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
Embodiment
As shown in figure 4, the present embodiment provides a kind of carbide furnace cooling device, including boiler tube 1, cooling tube 2, before boiler tube 1
End is connect by flange 3 with the heating zone of carbide furnace, and the rear end of boiler tube 1 is boat mouth, and 2 circumferential disc of cooling tube is around in outside boiler tube 1
And thermally contacted with boiler tube 1, cooling tube 2 is used as water inlet 21 close to the open at one end of carbide furnace, open at one end far from carbide furnace
As water outlet 22.
As shown in figure 5,1 cross section of boiler tube be it is rectangular, 45 ° of chamfering is arranged in the corner of boiler tube 1, and the edge of chamfering is set
Set transition arc.
The boiler tube 1 that uses in the present embodiment and cooling tube 2 are all thermally conductive good metal tube, and assemble method is specifically such as
Under:
Cooling tube 2 is preheating to 600~650 DEG C by step 1, preheating, and the tube body of cooling tube 2 generates a degree of expansion；
Step 2, winding welding: being intensively wrapped in 1 outer surface of boiler tube for the cooling tube 2 after preheating, during the winding process will
Cooling tube 2 is intermittently welded with boiler tube 1, and 1 inside water flowing of boiler tube is cooling when welding, guarantees that 1 wall metal plate of boiler tube will not be cooled pipe 2
The heat of conduction occurs and the thermal expansion in the same direction of cooling tube 2；
Step 3, cooling: after the completion of winding welding, 2 natural cooling of cooling tube for being bonded boiler tube 1 is simultaneously shunk, to boiler tube
1 forms extruding, forms compressive pre-stress in 1 pars intramuralis of boiler tube, this compressive pre-stress becomes after cooling tube 2 completes inherently answers
Power is present in always on 1 wall of boiler tube.
The front end of carbide furnace cooling device provided in this embodiment, boiler tube 1 is connected by the heating zone of flange 3 and carbide furnace
It connects, in use, the burner of carbide furnace has propeller, the boat 4 after a string of chargings is pushed into adding for carbide furnace by propeller
After hot-zone carries out high temperature sintering, then by the way that in propeller push-in boiler tube 1, filled with cooling water in cooling tube 2, high temperature boat 4 enters
Boiler tube 1 is simultaneously contacted with 1 bottom of metal boiler tube, and heat is passed to inside cooling tube 2 and cooled pipe 2 by 1 outer wall of metal boiler tube
Cooling water take away, thus to boat 4 more it is capable it is quick cooling and be fully cooled, it is in cooling procedure, red-hot just touching
Boat 4 when, there are the larger temperature difference for 1 inside and outside wall of boiler tube, can also be generated in outer wall side and be easy to cause the tensile stress of crackle, but
Due to the presence for the compressive pre-stress that cooling tube 2 generates, the tensile stress that 1 outer wall of boiler tube generates can be applied contrary precompressed and answer
Power is offset.
Carbide furnace cooling device provided in this embodiment, structure is simple, and processing and fabricating cost is low, and cooling efficiency is high, In
1550 DEG C of carbide furnace heating temperature, under the operating condition for pushing away fast 8 minutes/boat, furnace needed for the carbide furnace cooling device using the present embodiment
Length of tube is about 2.6 meters, and the continuous work service life was up to 3 years or more.
The above embodiment of the present invention is only example to illustrate the invention, and is not to implementation of the invention
The restriction of mode.For those of ordinary skill in the art, other can also be made not on the basis of the above description
With the variation and variation of form.Here all embodiments can not be exhaustive.It is all to belong to technical solution of the present invention
Changes and variations that derived from still in protection scope of the present invention within.
Claims (8)
1. a kind of carbide furnace cooling device, including boiler tube, the front end of the boiler tube and the heating zone of carbide furnace connect, after boiler tube
End is boat mouth out, which is characterized in that further includes cooling tube, the cooling tube circumferential disc is around in outside the boiler tube and connects with boiler tube heat
Touching.
2. carbide furnace cooling device according to claim 1, which is characterized in that the boiler tube cross section be it is rectangular, it is described
Chamfering is arranged in the corner of boiler tube.
3. carbide furnace cooling device according to claim 2, which is characterized in that the chamfering that the chamfering is 45 °.
4. carbide furnace cooling device according to claim 2, which is characterized in that transition circle is arranged in the edge of the chamfering
Arc.
5. carbide furnace cooling device according to claim 1, which is characterized in that the front end of the boiler tube passes through flange and carbon
Change the heating zone connection of furnace.
6. the assemble method of any carbide furnace cooling device of claim 1 to 5, which comprises the following steps:
Step 1, preheating: cooling tube is subjected to heating preheating；
Step 2, winding welding: being around in outer surface of furnace tube for the cooling tube circumferential disc after preheating, while winding by cooling tube with
Boiler tube is welded, and in welding process, carries out cooling down to boiler tube；
Step 3, cooling: after the completion of winding welding, cooling tube natural cooling.
7. the assemble method of carbide furnace cooling device according to claim 6, which is characterized in that using cold in the step 1
But pipe is metal tube, and preheating temperature is 600~650 DEG C.
8. the assemble method of carbide furnace cooling device according to claim 6, which is characterized in that in boiler tube in the step 2
Inside is passed through cooling water to carry out cooling down to boiler tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553253.4A CN110386603A (en) | 2019-06-25 | 2019-06-25 | A kind of carbide furnace cooling device and assemble method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553253.4A CN110386603A (en) | 2019-06-25 | 2019-06-25 | A kind of carbide furnace cooling device and assemble method |
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| Publication Number | Publication Date |
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| CN110386603A true CN110386603A (en) | 2019-10-29 |
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| CN201910553253.4A Pending CN110386603A (en) | 2019-06-25 | 2019-06-25 | A kind of carbide furnace cooling device and assemble method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262423A (en) * | 2000-01-21 | 2000-08-09 | 华南理工大学 | Prestressed shell-and-tube heat exchanger and its manufacture method |
| CN102923704A (en) * | 2012-11-15 | 2013-02-13 | 株洲弗拉德科技有限公司 | Continuous preparation method of tungsten carbide powder |
| CN105466214A (en) * | 2014-09-09 | 2016-04-06 | 自贡长城装备技术有限责任公司 | Automatic boat unloading device and boat unloading process thereof |
| CN205576018U (en) * | 2016-02-17 | 2016-09-14 | 浙江悟能环保科技发展有限公司 | Cooling chamber and cooling system of spoil carbomorphism device |
| CN109321262A (en) * | 2018-10-31 | 2019-02-12 | 联合优发生物质能源徐州有限公司 | Biomass carbonization water-cooled chiller |
| CN109850901A (en) * | 2019-03-28 | 2019-06-07 | 湖南信之材料工程技术有限责任公司 | It is a kind of for producing the full-automatic push boat type carbide furnace of superfine tungsten carbide |
-
2019
- 2019-06-25 CN CN201910553253.4A patent/CN110386603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262423A (en) * | 2000-01-21 | 2000-08-09 | 华南理工大学 | Prestressed shell-and-tube heat exchanger and its manufacture method |
| CN102923704A (en) * | 2012-11-15 | 2013-02-13 | 株洲弗拉德科技有限公司 | Continuous preparation method of tungsten carbide powder |
| CN105466214A (en) * | 2014-09-09 | 2016-04-06 | 自贡长城装备技术有限责任公司 | Automatic boat unloading device and boat unloading process thereof |
| CN205576018U (en) * | 2016-02-17 | 2016-09-14 | 浙江悟能环保科技发展有限公司 | Cooling chamber and cooling system of spoil carbomorphism device |
| CN109321262A (en) * | 2018-10-31 | 2019-02-12 | 联合优发生物质能源徐州有限公司 | Biomass carbonization water-cooled chiller |
| CN109850901A (en) * | 2019-03-28 | 2019-06-07 | 湖南信之材料工程技术有限责任公司 | It is a kind of for producing the full-automatic push boat type carbide furnace of superfine tungsten carbide |
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Application publication date: 20191029 |
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