CN214400384U - Upper structure for single-nozzle water-coal-slurry water-cooled wall gasification furnace - Google Patents
Upper structure for single-nozzle water-coal-slurry water-cooled wall gasification furnace Download PDFInfo
- Publication number
- CN214400384U CN214400384U CN202023295658.XU CN202023295658U CN214400384U CN 214400384 U CN214400384 U CN 214400384U CN 202023295658 U CN202023295658 U CN 202023295658U CN 214400384 U CN214400384 U CN 214400384U
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- water
- combustion chamber
- gasifier
- gasification furnace
- burner
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- 238000002309 gasification Methods 0.000 title claims abstract description 40
- 239000003250 coal slurry Substances 0.000 title claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The utility model discloses an upper structure for a single-nozzle water-coal-slurry water-cooled wall gasifier, which comprises a gasifier body, wherein a combustion chamber is arranged in the gasifier body, an annular cavity is arranged between the outer wall of the combustion chamber and the gasifier body, and nitrogen is filled in the annular cavity; an upper coil pipe and a refractory castable are arranged at an upper opening of the combustion chamber in the gasification furnace body, the upper coil pipe is coated in the refractory castable, and the refractory castable is hermetically connected with the upper opening of the combustion chamber; the upper part of the gasification furnace body is provided with a flange structure; the gasification furnace body is provided with a burner which penetrates through the flange structure and the refractory castable, the outer end of the burner is communicated with the outside of the gasification furnace, and the inner end of the burner is communicated with the combustion chamber; and a cooling jacket is arranged on the burner, and the burner is cooled by the cooling jacket water circulation. The scheme cancels the water inlet and outlet pipes of the upper coil pipe, simplifies the structure of the furnace top, improves the continuous operation time of the gasification furnace, reduces the maintenance frequency, eliminates the potential safety hazard caused by frequent furnace opening and shutting, and improves the production benefit.
Description
Technical Field
The utility model relates to a single nozzle coal slurry water-cooling wall gasifier field of making design, concretely relates to superstructure that is used for single nozzle coal slurry water-cooling wall gasifier.
Background
The top and the hanging wall pipe of the single-nozzle coal water slurry gasification furnace of the original system are frequently leaked and need to be replaced every year, the furnace needs to be forcibly shut down and maintained after replacement, complex processes such as pressure relief, replacement, cooling, top cover screw removal, top coil replacement, upper coil positioning, refractory material pouring, sealing surface repair, top cover screw fastening, air tightness experiment, long-time furnace drying and feeding are needed after each shutdown, the maintenance time is about 6 days, the furnace drying time is more than 2 days and more than 8 days in total, and the production, the technology and the maintenance personnel in the mobile workshop, the castable manufacturers, the materials, the equipment suppliers and the like can be firmly maintained day and night, a large amount of manpower, material resources and financial resources are consumed, the whole-year production task is influenced, the production cost is increased, and the enterprise benefit loss is serious.
In addition, because the water inlet and outlet pipes are reserved on the two large flanges at the top of the furnace, the assembly and the installation are very difficult, and the assembly time of the gasification furnace is seriously influenced; there are also many potential safety hazards during the blow-out period and the risk of the rear system stopping due to loss of air supply is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an superstructure that is used for single nozzle coal slurry water-cooling wall gasifier.
In order to achieve the above object, the utility model provides a following technical scheme: an upper structure for a single-nozzle water-coal-slurry water-cooled wall gasifier comprises a gasifier body, wherein a combustion chamber is arranged in the gasifier body, an annular cavity is arranged between the outer wall of the combustion chamber and the gasifier body, and nitrogen is filled in the annular cavity; an upper coil pipe and a refractory castable are arranged at an upper opening of the combustion chamber in the gasification furnace body, the upper coil pipe is coated in the refractory castable, and the refractory castable is hermetically connected with the upper opening of the combustion chamber; the upper part of the gasification furnace body is provided with a flange structure; the gasification furnace body is provided with a burner which penetrates through the flange structure and the refractory castable, the outer end of the burner is communicated with the outside of the gasification furnace, and the inner end of the burner is communicated with the combustion chamber; and a cooling jacket is arranged on the burner, and circulating cooling liquid is arranged in the cooling jacket.
Further, the flange structure comprises an outer flange and an inner flange which are connected in an up-and-down stacking mode.
Further, the inner flange is fixedly connected with the gasification furnace body.
Further, the circulating cooling liquid is circulating cooling water.
Furthermore, a sealing plate is arranged in the gasification furnace body to separate the annular cavity from the combustion chamber; the shrouding is through full welding mode and combustion chamber upper portion opening outer wall and gasification stove body sealing connection.
Furthermore, the surface of the sealing plate is coated with a refractory castable.
Furthermore, the upper coil is of an empty pipe structure which does not store cooling liquid.
Furthermore, the material of the upper coil pipe is Incoloy825 material or 12Cr1MoVG material.
The technical effects of the utility model are as follows: the top coil and the slag hole coil of the gasification furnace of the original design scheme are leaked every year, the furnace shutdown maintenance and replacement are required, the material cost for replacing the coil of each gasification furnace is 8 ten thousand yuan, and the other maintenance and management costs are about 15 ten thousand yuan, which is 23 ten thousand yuan in total. The total time from the shutdown to the startup of the furnace is at least 8 days, the urea yield of the end product is about 11032.9 tons, the sale price is 1820 ten thousand yuan calculated by 1650 yuan/ton, and the total capital loss is 1843 ten thousand yuan per year. Meanwhile, various potential safety hazards can be caused in the process of starting and stopping the automobile, and the continuous production operation of the rear body system is threatened. The scheme improves the continuous operation time of the single-nozzle coal water slurry gasification furnace, reduces the maintenance frequency, eliminates the potential safety hazard caused by frequent furnace opening and shutting, reduces the capital loss and greatly improves the production benefit. The water inlet and outlet pipe of the upper coil pipe is eliminated, the design of the furnace top is simpler, and the installation is more convenient; effectively completely cut off combustion chamber and gasification furnace body, factor of safety is bigger, and the operation is more stable.
Drawings
FIG. 1 is a schematic view of the top structure of a gasification furnace in the example.
Reference numerals: 1. a gasifier body; 2. a combustion chamber; 3. an annular cavity; 4. burning a nozzle; 5. feeding a coil pipe; 6. closing the plate; 7. an outer flange; 71. an inner flange; 8. a refractory castable.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in figure 1, the upper structure for the single-nozzle water-coal-slurry water-cooled wall gasifier comprises a gasifier body 1, wherein a combustion chamber 2 is arranged in the gasifier body 1, an annular cavity 3 is arranged between the outer wall of the combustion chamber 2 and the gasifier body 1, and nitrogen is filled in the annular cavity 3 and has temperature and pressure indications; an upper coil pipe 5 and a refractory castable 8 are arranged at an upper opening of the combustion chamber 2 in the gasification furnace body 1, the upper coil pipe 5 is coated in the refractory castable 8, and the refractory castable 8 is hermetically connected with the upper opening of the combustion chamber 2; the upper part of the gasification furnace body 1 is provided with a flange structure; the gasification furnace body 1 is provided with a burner 4, the burner 4 penetrates through the flange structure and the refractory castable 8, the outer end of the burner 4 is communicated with the outside of the gasification furnace, and the inner end of the burner 4 is communicated with the combustion chamber 2; and a cooling jacket is arranged on the burner 4, and circulating cooling liquid is arranged in the cooling jacket and can be circulating cooling water. The burner 4 is cooled by self cooling jacket water circulation. The upper coil 5 is an empty tube structure in which the coolant is not stored. The winding pipe in the upper coil pipe 5 is not communicated with water, and only serves as a framework to lay refractory castable 8 to surround the periphery of the burner 4.
The flange structure comprises an outer flange 7 and an inner flange 71 which are connected in an up-and-down stacking manner.
The inner flange 71 is fixedly connected with the gasification furnace body 1.
A sealing plate 6 is arranged in the gasification furnace body 1 to separate the annular cavity 3 from the refractory castable 8; the closing plate 6 is hermetically connected with the outer wall of the upper opening of the combustion chamber 2 and the gasification furnace body 1 in a full-welding mode.
The surface of the closing plate 6 is coated with a refractory castable material 8.
The material of the upper coil 5 is Incoloy825 material or 12Cr1MoVG material. The 12Cr1MoVG is mainly used for boilers, and has low corrosion resistance requirement and the highest working temperature of 580 ℃; incoloy825 has good corrosion resistance in various complex environments, and the maximum working temperature is 900 ℃.
The improvement of the scheme is that the device comprises a shell,
1. water inlet and outlet pipelines on two large flanges at the top of the gasification furnace are eliminated, a metal winding pipe in an upper coil pipe 5 is used as a framework to lay refractory castable to wrap the periphery of a burner 4, and the body of the burner 4 is cooled by water of a jacket boiler of the burner;
2. the material of a metal winding pipe in the upper coil pipe 5 which runs under the severe working condition is adjusted to Incoloy825 from original 12Cr1MoVG, wherein the former is mainly used for boilers and has low corrosion resistance requirement and the highest working temperature of 580 ℃; incoloy825 has good corrosion resistance in various complex environments, and has the highest working temperature of 900 ℃;
3. the sealing plate 6 is fully welded and coated with the refractory castable 8, while the original design is spot-welded and the castable is not coated inside and outside.
Through the improvement, the furnace top structure is simplified, the continuous operation time of the single-nozzle coal water slurry gasification furnace is improved, the maintenance frequency is reduced, the potential safety hazard caused by frequent furnace opening and shutting is eliminated, the capital loss is reduced, and the production benefit is greatly improved.
The upper coil pipe 5 has the following functions: isolating the combustion chamber 2 and the gasification furnace body 1, wherein the temperature of the combustion chamber 2 is over 1700 ℃, and the temperature of the shell is controlled within 150 ℃; the protection burner 4 works for a long time in a high-temperature, high-humidity and high-corrosion environment.
The design method is as follows: by analyzing the design action and the working principle of the burner 4 and the upper coil 5, the corrosion condition of ions in gasified raw material coal on alloy materials in a dew point region and other factors, the water inlet and outlet pipelines of the upper coil 5 are closed, the coil in the furnace is used as a framework to lay refractory castable 8 to surround the periphery of the burner 4, and the body of the burner 4 is cooled by cooling jacket water in a circulating way; aiming at the problem of material corrosion under the severe working condition of the top coil pipe, the original 12Cr1MoVG material is adjusted to be an Inconel825 material. By adopting the scheme, the temperature of the vault of the gasification furnace, the temperature of the burner 4 flow meter and the temperature of the annular cavity 3 are normal, no abnormality or fluctuation is found, and other process indexes are normal. The coil pipe does not leak any more, the temperature of the vault of the gasification furnace and the temperature of the annular cavity 3 are normal, and no rising trend occurs; the cooling water flow of the burner 4 is normal, and no flow rising trend is found. The replacement frequency of the coil pipe and the frequency of furnace shutdown and maintenance are reduced, and the continuous operation time of the single-nozzle coal water slurry gasification furnace is prolonged; the yield of the synthesis gas is improved, the physical yield of an enterprise is improved, the consumption of vulnerable parts is reduced, and the enterprise benefit is improved; the start-up and shutdown time and the oven drying time are reduced, and the gas consumption is reduced; the generation of pollutants is reduced, and the environment is protected; the number of times of starting and stopping is reduced, potential safety hazards are avoided, and the risk that the system stops without an air source is reduced; the design of the furnace top is simpler and the installation is more convenient; effectively isolate combustion chamber 2 and gasification furnace body 1, factor of safety is bigger, and the operation is more stable.
The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.
Claims (8)
1. An upper structure for a single-nozzle water-coal-slurry water-cooled wall gasifier is characterized by comprising a gasifier body, wherein a combustion chamber is arranged in the gasifier body, an annular cavity is arranged between the outer wall of the combustion chamber and the gasifier body, and nitrogen is filled in the annular cavity; an upper coil pipe and a refractory castable are arranged at an upper opening of the combustion chamber in the gasification furnace body, the upper coil pipe is coated in the refractory castable, and the refractory castable is hermetically connected with the upper opening of the combustion chamber; the upper part of the gasification furnace body is provided with a flange structure; the gasification furnace body is provided with a burner which penetrates through the flange structure and the refractory castable, the outer end of the burner is communicated with the outside of the gasification furnace, and the inner end of the burner is communicated with the combustion chamber; and a cooling jacket is arranged on the burner, and circulating cooling liquid is arranged in the cooling jacket.
2. The superstructure of single nozzle water-coal-slurry water-cooled wall gasifier according to claim 1, wherein the flange structure comprises an outer flange and an inner flange which are connected in an up-and-down stacking manner.
3. The superstructure for single nozzle coal water slurry water-cooled wall gasifier of claim 2, wherein the inner flange is fixedly connected with the gasifier body.
4. The superstructure for single nozzle coal-water slurry water-cooled wall gasifier according to claim 1, characterized in that the circulating cooling liquid is circulating cooling water.
5. The superstructure of the single nozzle water-coal-slurry water-cooled wall gasifier of claim 1, wherein a sealing plate is arranged in the gasifier body to separate the annular cavity from the combustion chamber; the shrouding is through full welding mode and combustion chamber upper portion opening outer wall and gasification stove body sealing connection.
6. The superstructure of single nozzle water-coal-slurry water-cooled wall gasifier of claim 5, wherein the surface of the closing plate is coated with refractory castable.
7. The superstructure of claim 1, wherein the upper coil is an empty pipe structure without coolant.
8. The superstructure of claim 1, wherein the upper coil is made of Incoloy825 material or 12Cr1MoVG material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023295658.XU CN214400384U (en) | 2020-12-31 | 2020-12-31 | Upper structure for single-nozzle water-coal-slurry water-cooled wall gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023295658.XU CN214400384U (en) | 2020-12-31 | 2020-12-31 | Upper structure for single-nozzle water-coal-slurry water-cooled wall gasification furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214400384U true CN214400384U (en) | 2021-10-15 |
Family
ID=78044700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023295658.XU Expired - Fee Related CN214400384U (en) | 2020-12-31 | 2020-12-31 | Upper structure for single-nozzle water-coal-slurry water-cooled wall gasification furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214400384U (en) |
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2020
- 2020-12-31 CN CN202023295658.XU patent/CN214400384U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211015 |