CN105001918B - A kind of gasification furnace Quench pipe bend replacing options - Google Patents
A kind of gasification furnace Quench pipe bend replacing options Download PDFInfo
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- CN105001918B CN105001918B CN201510450097.0A CN201510450097A CN105001918B CN 105001918 B CN105001918 B CN 105001918B CN 201510450097 A CN201510450097 A CN 201510450097A CN 105001918 B CN105001918 B CN 105001918B
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- forging
- elbow
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Abstract
A kind of gasification furnace Quench pipe bend replacing options provided by the invention, include the following steps：1. determine forging；2. determine segmentation；3. cutting；4. replace welding；5. symmetric sections cutting；6. symmetric sections replace welding；7. it checks on the quality.The present invention is overhauled according to equipment original design recovery, does not change former design channel gas field distribution, stress distribution is uniform, long lifespan；Expense is low, and solid forging price is less than 100,000 yuan, and single elbow welding total price is more than 250,000 yuan；It replaces fast, replacing construction is short；Whether reasonable do not need to recalculate stress distribution, and whether reasonable, and design cost is significantly increased if needing to look for qualified designing unit's simulation to calculate stress distribution with the mode of single elbow welding in the prior art.
Description
Technical field
The present invention relates to a kind of gasification furnace Quench pipe bend replacing options, belong to powdered coal pressuring gasified device improved technology neck
Domain.
Background technology
Using the coal gasifying process of gas Quench, gasification furnace interior room is divided into two parts up and down, lower part is combustion chamber, on
Portion is that shock chamber, coal dust and oxygen are reacted in combustion chamber, and temperature is 1600 DEG C or so.Lower combustion chamber is in order to avoid high temperature, molten
Slag corrosion and driving and parking generate stress the destruction of refractory material is caused gasification furnace can not long-term operation, gasification furnace inner cylinder adopts
With water wall structure, only there is one layer of thin refractory coating in side towards the fire, when normal operating is molten on water-cooling wall by hanging over
Slag blanket protects metal water cold wall；High-temperature synthesis gas is flowed out from top of combustion chamber, subsequently enters shock chamber, and " cold conditions " mixing is utilized to close
Quench is carried out to it into gas, synthesis gas temperature is reduced to 900 DEG C or so, then continue to cool down into next equipment through Quench pipe.
In order to protect Quench pipe, be made of cylinder type water-cooling wall, sealed separation between each pipe of water-cooling wall, in water-cooling wall by be
270 DEG C or so of water, vapour mixture.
In order to ensure that internals stress distribution is uniform, Quench section entrance A as shown in Figure 3 uses one piece elbow as shown in Figure 1,
Turbulent flow is generated since the high-temperature gas that Quench gas and gasification furnace burn crosses in Quench section entrance, in addition diameter drastically reduces, gas
Body flow velocity increases, and the lime-ash of gas entrainment washes away one piece elbow component, it is easy to lead to the parts damages.
One piece elbow technical characterstic：
(1) diameter is big, much larger than gasification furnace manhole diameter, it is impossible to be put into the corresponding position of gasification furnace by gasification furnace manhole
It puts, that is, is unable to integral replacing；
(2) it meets with stresses big, also acts as the effect for supporting entire Quench pipe weight；
(3) elbow thickness is more than 50mm, and adjacent bend channel distance only has 50mm, leads to according to a conventional method from adjacent bend
Welding difficulty after cutting among road, time-consuming and be not easy to penetrate, residual stress is big, and postwelding will be heat-treated, by structure and space
It limits, heat treatment heating, constant temperature and cooling are all difficult the heat treatment process for meeting material after forging elbow welding, cause stress collection
In, influence welding quality；
(4) it is limited by space, weld seam cannot carry out defect detecting test, if one piece elbow interface is lack of penetration, easily be sent out in operation
Raw fracture.
At present, for the replacement of elbow, after being installed due to gasifying furnace device and carried out closing work, elbow integrally can not
Progress integral replacing installation at position A shown in Fig. 3 can be directly placed into, therefore shell gasifying furnace device is with single curved in the whole world
Head welding replaces one piece elbow, causes stress distribution uneven and yielding in this way.First with " Ω " pipe according to design bending radius system
Single elbow has been made, and reinforcing plate is welded on elbow by Stress calculation, then one group of elbow of certain amount welding is replaced,
It takes and the duration is longer, construction is complicated.
Invention content
In order to solve the above technical problems, the present invention provides a kind of gasification furnace Quench pipe bend replacing options, the gasification furnace
Quench pipe bend replacing options can effectively avoid the problem that stress concentration, and operability is high.
The present invention is achieved by the following technical programs.
A kind of gasification furnace Quench pipe bend replacing options provided by the invention；Include the following steps：
1. determine forging：Process the size elbow forging identical with one piece elbow to be replaced；
2. determine segmentation：Forging and one piece elbow to be replaced correspondence are divided into multistage；
3. cutting：One section arbitrarily needed replacing is chosen, the center line of elbow channel, which is cut, along elbow removes；
4. replace welding：To need replacing one section removed, replace install corresponding arc length, corresponding position new forging,
And it is welded along notch；
5. symmetric sections cutting：By one section on more finish changing one section of symmetry direction, cutting is removed；
6. symmetric sections replace welding：By one section on the symmetry direction removed, corresponding arc length, corresponding position are installed in replacement
New forging, and welded along notch；
7. it checks on the quality：Repeat 3.~6., all replace and finish, and check and replaced until all segmentations for needing replacing
Segmented welding quality.
The step 2. in, 30 °~60 ° forging 1 is segmented according to arc length
The beneficial effects of the present invention are：It is overhauled according to equipment original design recovery, does not change former design channel gas field point
Cloth, stress distribution is uniform, long lifespan；Expense is low, and solid forging price is less than 100,000 yuan, and single elbow welding total price is more than
250000 yuan；It replaces fast, replacing construction is short；Whether reasonable do not need to recalculate stress distribution, and in the prior art with single
Whether the mode of elbow welding needs to look for qualified designing unit's simulation calculating stress distribution reasonable, and design charges is significantly increased
With.
Description of the drawings
Fig. 1 is the structure diagram of solid forging elbow in the present invention；
Fig. 2 is the portion intercepts structure diagram of Fig. 1；
Fig. 3 is Fig. 1 in single unit system position schematic diagram；
In figure：1- forging, 2- elbows, 3- elbow channels.
Specific embodiment
Be described further below technical scheme of the present invention, but claimed range be not limited to it is described.
The present invention provides a kind of gasification furnace Quench pipe bend replacing options, include the following steps：
1. determine forging：Process the size elbow forging 1 identical with one piece elbow to be replaced；
2. determine segmentation：Forging 1 and one piece elbow to be replaced correspondence are divided into multistage；
3. cutting：One section arbitrarily needed replacing is chosen, the center line of elbow channel 3, which is cut, along elbow 2 removes；
4. replace welding：To need replacing one section removed, replace install corresponding arc length, corresponding position new forging 1,
And it is welded along notch；
5. symmetric sections cutting：By one section on more finish changing one section of symmetry direction, cutting is removed；
6. symmetric sections replace welding：By one section on the symmetry direction removed, corresponding arc length, corresponding position are installed in replacement
New forging 1, and welded along notch；
7. it checks on the quality：Repeat 3.~6., all replace and finish, and check and replaced until all segmentations for needing replacing
Segmented welding quality.
The step 2. in, 30 °~60 ° forging 1 is segmented according to arc length.
As a result, due to being cut from elbow channel center, thickness substantially reduces, less than the 1/3 of forging thickness, after groove of polishing
Easily welding, operability is high and easily penetrates, and due to thinner thickness, postwelding can be protected without heat treatment, weldquality
Card, and without integral replacing, it is bad how long change how long.
Claims (2)
1. a kind of gasification furnace Quench pipe bend replacing options, it is characterised in that：Include the following steps：
1. determine forging：Process the forging (1) of the size elbow identical with one piece elbow to be replaced；
2. determine segmentation：Multistage is divided by forging (1) is corresponding with one piece elbow to be replaced；
3. cutting：One section arbitrarily needed replacing is chosen, the center line of elbow channel (3), which is cut, along elbow (2) removes；
4. replace welding：To need replacing one section removed, replace install corresponding arc length, corresponding position new forging (1),
And it is welded along notch；
5. symmetric sections cutting：By one section on more finish changing one section of symmetry direction, cutting is removed；
6. symmetric sections replace welding：By one section on the symmetry direction removed, replace install corresponding arc length, corresponding position it is new
Forging (1), and welded along notch；
7. it checks on the quality：Repeat 3.~6., all replace and finish until all segmentations for needing replacing, and check point replaced
Section welding quality.
2. gasification furnace Quench pipe bend replacing options as described in claim 1, it is characterised in that：The step 2. in, according to
Forging (1) is segmented by 30 °~60 ° of arc length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450097.0A CN105001918B (en) | 2015-07-28 | 2015-07-28 | A kind of gasification furnace Quench pipe bend replacing options |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450097.0A CN105001918B (en) | 2015-07-28 | 2015-07-28 | A kind of gasification furnace Quench pipe bend replacing options |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105001918A CN105001918A (en) | 2015-10-28 |
| CN105001918B true CN105001918B (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510450097.0A Active CN105001918B (en) | 2015-07-28 | 2015-07-28 | A kind of gasification furnace Quench pipe bend replacing options |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896261A (en) * | 2012-09-21 | 2013-01-30 | 上海电气（无锡）锻压有限公司 | Method for forging forming of large-diameter ring |
| CN204224555U (en) * | 2014-10-22 | 2015-03-25 | 陕西鑫立喷嘴研制开发有限公司 | A kind of novel chilling ring |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090056223A1 (en) * | 2007-09-04 | 2009-03-05 | Patel Sunilkant A | Quench ring rim and methods for fabricating |
-
2015
- 2015-07-28 CN CN201510450097.0A patent/CN105001918B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896261A (en) * | 2012-09-21 | 2013-01-30 | 上海电气（无锡）锻压有限公司 | Method for forging forming of large-diameter ring |
| CN204224555U (en) * | 2014-10-22 | 2015-03-25 | 陕西鑫立喷嘴研制开发有限公司 | A kind of novel chilling ring |
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| Publication number | Publication date |
|---|---|
| CN105001918A (en) | 2015-10-28 |
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