CN116772586A - Heat-insulating corrosion-resistant manhole device for overhauling boiling chlorination furnace and boiling chlorination furnace - Google Patents
Heat-insulating corrosion-resistant manhole device for overhauling boiling chlorination furnace and boiling chlorination furnace Download PDFInfo
- Publication number
- CN116772586A CN116772586A CN202310754994.5A CN202310754994A CN116772586A CN 116772586 A CN116772586 A CN 116772586A CN 202310754994 A CN202310754994 A CN 202310754994A CN 116772586 A CN116772586 A CN 116772586A
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- stainless steel
- chlorination furnace
- manhole
- boiling chlorination
- steel pipe
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- 238000005660 chlorination reaction Methods 0.000 title claims abstract description 84
- 238000009835 boiling Methods 0.000 title claims abstract description 81
- 238000005260 corrosion Methods 0.000 title claims abstract description 24
- 230000007797 corrosion Effects 0.000 title claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 69
- 239000010935 stainless steel Substances 0.000 claims abstract description 69
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims description 16
- 210000000078 claw Anatomy 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010425 asbestos Substances 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 9
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002341 toxic gas Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 4
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The application provides a heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace and the boiling chlorination furnace, wherein the manhole device is arranged at a boiling section of the boiling chlorination furnace and comprises a manhole connecting pipe, a stainless steel pipe and a manhole cover, the manhole connecting pipe is connected with a furnace shell of the boiling chlorination furnace, and the manhole cover is arranged at one end of the manhole connecting pipe far away from the furnace shell; the inner wall of the manhole connecting pipe is nested with the outer wall of the stainless steel pipe, the stainless steel pipe extends towards the hearth of the boiling chlorination furnace and penetrates through the refractory layer at the inner side of the furnace shell until being communicated with the hearth of the boiling chlorination furnace, at least a sealing element is arranged in a pipe cavity of the stainless steel pipe, and the sealing element can be taken out from or put into the stainless steel pipe; according to the application, the manhole device is arranged at the boiling section of the boiling chlorination furnace, so that slag in the furnace can be rapidly discharged through the manhole device, time and labor are saved, safety and efficiency are realized, and personnel safety of staff is greatly ensured.
Description
Technical Field
The application relates to the technical field of chemical metallurgy, in particular to a heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace and the boiling chlorination furnace.
Background
When the boiling chlorination furnace is used for producing titanium tetrachloride, the used raw materials are chlorine, the reaction temperature is 900-1000 ℃, and other gases such as a small amount of hydrogen chloride are generated besides the generated titanium tetrachloride, so that a large amount of titanium tetrachloride, chlorine and a small amount of toxic gases such as hydrogen chloride exist in a hearth of the boiling chlorination furnace.
In addition, considering the material state of the boiling chlorination furnace at the boiling section, toxic gas leakage, production safety and other factors, the boiling chlorination furnace in the prior art is often not provided with a manhole at the furnace shell (especially the boiling section); when the chlorination furnace fails and needs to be shut down for maintenance, the common maintenance method in the prior art is to naturally cool the materials in the furnace to normal temperature, the cooling time generally needs about one week, then the flange at the top of the chlorination furnace is opened, the air in the furnace is replaced by a fan, and when the oxygen content in the furnace reaches the oxygen range of personnel safety, people can enter from the top of the furnace; meanwhile, for the operation of personnel in the furnace, slag is loaded into a ton bag and lifted out through a lifting machine at the top of the furnace, so that the operation is time-consuming and labor-consuming, the space for avoiding danger is limited (even no space for avoiding danger) and the safety of the personnel in the furnace is also a great threat.
Disclosure of Invention
In view of the above, the application aims to provide a heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace and the boiling chlorination furnace, so as to solve the problems that in the prior art, when the boiling chlorination furnace overhauls, personnel are required to enter the furnace to operate in a limited space, so that the working efficiency of overhauling, slag removal and the like is lower, the safety risk of personnel in the furnace is higher and the like.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
the heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace is arranged at the boiling section of the boiling chlorination furnace and comprises a manhole connecting pipe, a stainless steel pipe and a manhole cover, wherein the manhole connecting pipe is connected with a furnace shell of the boiling chlorination furnace, and the manhole cover is arranged at one end of the manhole connecting pipe far away from the furnace shell; the stainless steel pipe is arranged in the manhole connecting pipe, the inner wall of the manhole connecting pipe is nested with the outer wall of the stainless steel pipe, the stainless steel pipe extends towards the hearth of the boiling chlorination furnace and penetrates through the refractory layer on the inner side of the furnace shell until being communicated with the hearth of the boiling chlorination furnace, at least a sealing piece is arranged in the pipe cavity of the stainless steel pipe, and the sealing piece can be taken out of the stainless steel pipe or put into the stainless steel pipe.
Further, the inner wall of the stainless steel pipe is provided with a refractory casting layer, the pipe cavity of the stainless steel pipe is surrounded by the refractory casting layer, and the sealing element is filled in the pipe cavity.
Further, a plurality of claw nails are welded on the inner wall of the stainless steel pipe, are arranged in the refractory casting layer and are connected with the refractory casting layer.
Further, the creep rupture strength of the stainless steel pipe is more than or equal to 18MPa at 900-1000 ℃; the stainless steel tube is a nickel-based superalloy stainless steel tube.
Further, gaps between the outer wall of the stainless steel pipe and the refractory layer are filled with fireclay.
Further, the seal is an asbestos rope.
Further, the manhole cover is provided with a plug towards one side of the stainless steel pipe cavity, and the plug extends towards the hearth of the boiling chlorination furnace and can be tightly attached to the sealing piece.
The boiling section of the boiling chlorination furnace is provided with the heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace.
Compared with the prior art, the heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace and the boiling chlorination furnace have the following advantages:
according to the heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace and the boiling chlorination furnace, the manhole device is arranged at the boiling section of the boiling chlorination furnace, so that cooling is not needed and personnel do not need to enter the furnace during overhauling of the chlorination furnace, slag in the furnace can be rapidly discharged through the manhole device, time and labor are saved, safety and efficiency are guaranteed, and personal safety of overhauling staff is greatly guaranteed.
In addition, through setting up the stainless steel pipe in the manhole takeover, set up the sealing member in the stainless steel pipe simultaneously, on the one hand the stainless steel pipe can provide the guard action to the manhole takeover, prevents the direct corruption manhole takeover of high temperature gas in the production process, avoids causing the emergence of the condition of revealing of material in the stove because of the manhole takeover is damaged, on the other hand ensures that manhole device has good leakproofness, in boiling chlorination stove production titanium tetrachloride in-process, can effectively prevent that toxic gases such as in the stove titanium tetrachloride, chlorine, hydrogen chloride from revealing, ensure on-the-spot staff's life safety.
In addition, the stainless steel pipe penetrates through the fire resistant layer on the inner side of the furnace shell, the fire resistant layer around the manhole duct is supported and reinforced by the stainless steel pipe, the fire resistant layer in the furnace shell is guaranteed to have enough strength, the relative structure of the fire resistant layer can be effectively prevented from being corroded, scoured and falling, collapse of the chlorination furnace can be avoided to a certain extent, and the operation period of the boiling chlorination furnace can be prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is an assembly schematic diagram of a heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace at a boiling section of the boiling chlorination furnace according to an embodiment of the application;
fig. 2 is a schematic structural diagram of a heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace according to an embodiment of the application.
Reference numerals illustrate:
1. a furnace shell; 2. a manhole connecting pipe; 3. stainless steel tube; 4. a refractory casting layer; 5. a claw nail; 6. a seal; 7. a manhole cover; 8. a plug; 9. and a refractory layer.
Detailed Description
The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application will be described in detail below with reference to the drawings in connection with embodiments.
In the prior art, a manhole is not arranged on a furnace shell (particularly a boiling section) of the boiling chlorination furnace; when the chlorination furnace fails and needs to be shut down for maintenance, the common maintenance method in the prior art is to naturally cool the materials in the furnace to normal temperature, the cooling time generally needs about one week, then the flange at the top of the chlorination furnace is opened, the air in the furnace is replaced by a fan, and when the oxygen content in the furnace reaches the oxygen range of personnel safety, people can enter from the top of the furnace; meanwhile, for the operation of personnel in the furnace, slag is loaded into a ton bag and lifted out through a lifting machine at the top of the furnace, so that the operation is time-consuming and labor-consuming, the space for avoiding danger is limited (even no space for avoiding danger) and the safety of the personnel in the furnace is also a great threat.
In order to solve the problems that in the prior art, when a boiling chlorination furnace is overhauled, personnel are required to enter the furnace to operate in a limited space, so that the working efficiency of overhauling, slag removal and the like is lower, the safety risk of personnel in the furnace is higher and the like, the embodiment provides a heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace and the boiling chlorination furnace, wherein the manhole device is arranged at a boiling section of the boiling chlorination furnace and comprises a manhole connecting pipe 2, a stainless steel pipe 3 and a manhole cover 7, the manhole connecting pipe 2 is connected with a furnace shell 1 of the boiling chlorination furnace, and one end of the manhole connecting pipe 2 far away from the furnace shell 1 is provided with the manhole cover 7 for opening a population or plugging; the stainless steel pipe 3 is arranged in the manhole connecting pipe 2, the inner wall of the manhole connecting pipe 2 is nested with the outer wall of the stainless steel pipe 3, the stainless steel pipe 3 extends towards the hearth of the boiling chlorination furnace and penetrates through the refractory layer 9 on the inner side of the furnace shell 1 until being communicated with the hearth of the boiling chlorination furnace, at least the sealing piece 6 is arranged in the pipe cavity of the stainless steel pipe 3, and the sealing piece 6 can be taken out from the stainless steel pipe 3 or put into the stainless steel pipe 3.
When the chlorination furnace is required to be overhauled and deslagged, the manhole cover 7 is opened, the sealing element 6 is taken out, operators can carry out deslagging, overhauling and other operations outside the chlorination furnace, after the operations are finished, the sealing element 6 is installed, and the manhole cover 7 is closed. Therefore, the manhole device is arranged at the boiling section of the boiling chlorination furnace, so that cooling is not needed and personnel are not needed to enter the furnace during overhauling of the chlorination furnace, slag in the furnace can be rapidly discharged through the manhole device, time and labor are saved, safety and efficiency are realized, and personal safety of overhauling staff is greatly guaranteed.
In addition, through setting up nonrust steel pipe 3 in manhole takeover 2, set up sealing member 6 in nonrust steel pipe 3 simultaneously, on the one hand nonrust steel pipe 3 can provide the guard action to manhole takeover 2, prevent the direct corruption manhole takeover 2 of high temperature gas in the production process, avoid because of the broken emergence that causes the material leakage condition in the stove of manhole takeover 2, on the other hand ensure that manhole device has good leakproofness, in boiling chlorination stove production titanium tetrachloride in-process, can effectively prevent that toxic gases such as stove titanium tetrachloride, chlorine, hydrogen chloride from revealing, ensure on-the-spot staff's life safety.
In addition, the stainless steel pipe 3 penetrates through the refractory layer 9 on the inner side of the furnace shell 1, the refractory layer 9 (such as refractory bricks) around a manhole hole is supported and reinforced by the stainless steel pipe 3, the refractory layer 9 in the furnace shell 1 is ensured to have enough strength, the relative structure of the refractory layer 9 can be effectively prevented from being corroded, scoured and shed, collapse of the chlorination furnace is avoided to a certain extent, and the operation period of the boiling chlorination furnace is prolonged. Preferably, a gap between the outer wall of the stainless steel pipe 3 and the refractory layer 9 is filled by setting fire clay.
For the stainless steel tube 3, the creep rupture strength of the stainless steel tube 3 is more than or equal to 18MPa at 900-1000 ℃, so that the stainless steel tube 3 is ensured to have enough supporting strength in a high-temperature environment, the long-term effective supporting and reinforcing effects of the stainless steel tube 3 on the refractory layer 9 can be ensured, and the operation period of the boiling chlorination furnace can be further prolonged. The stainless steel tube 3 is preferably a nickel-based superalloy stainless steel tube, and has good high-temperature resistance and corrosion resistance.
The inner wall of the stainless steel pipe 3 is provided with a refractory casting layer 4, correspondingly, a pipe cavity of the stainless steel pipe 3 is surrounded by the refractory casting layer 4, and the sealing piece 6 is filled in the pipe cavity, so that the inner wall of the stainless steel pipe 3 is protected by the refractory casting layer 4, and meanwhile, the refractory performance of the stainless steel pipe 3 is further improved, and the heat insulation and corrosion resistance of a manhole device are enhanced. Preferably, the refractory castable layer 4 is a layer structure formed by laying refractory castable on the inner wall of the stainless steel pipe 3, and the refractory castable layer 4 can completely cover the inner wall of the stainless steel pipe 3.
In addition, the inner wall welding of stainless steel pipe 3 a plurality of claw nails 5, simultaneously, claw nails 5 are set up in refractory casting layer 4 to be connected with refractory casting layer 4, thereby be favorable to improving refractory casting layer 4 in the fastness of stainless steel pipe 3 inner wall, avoid refractory casting layer 4 to break away from stainless steel pipe 3 inner wall. In the concrete setting process, a plurality of connection points can be uniformly arranged on the inner wall of the stainless steel pipe 3, corresponding claw nails 5 are welded on each connection point, and then refractory castable is built on the inner wall of the stainless steel pipe 3 until the refractory castable floods the claw nails 5, so that a refractory castable layer 4 is formed.
The sealing element 6 is preferably made of asbestos rope and fills the lumen, so that the sealing element 6 has good high-temperature resistance and corrosion resistance, the service life is prolonged, and the sealing element 6 can fill and seal the lumen as much as possible due to the flexibility of the asbestos rope, and the sealing element 6 has good sealing performance.
The manhole cover 7 is provided with a plug 8 towards one side of the pipe cavity of the stainless steel pipe 3, and the plug 8 properly extends towards the hearth of the boiling chlorination furnace and can be tightly attached to the sealing piece 6. Specifically, the side of the plug 8 facing the hearth of the fluidizing chlorination furnace and the side wall of the plug 8 can be tightly attached to the sealing member 6, and accordingly, the "tightly attached" can be understood as interference fit. Thereby being beneficial to further improving the sealing performance of the manhole device at the manhole cover 7, effectively preventing toxic gas in the furnace from leaking, and guaranteeing the life safety of on-site staff.
The application relates to a fluidized bed chlorination furnace, which comprises the heat-insulating corrosion-resistant manhole device for overhauling the fluidized bed chlorination furnace, wherein the manhole device is arranged at the fluidized bed section of the fluidized bed chlorination furnace. On the basis of the related structures and the assembly relations provided in the embodiment, the boiling chlorination furnace further comprises conventional chlorination furnace components including furnace top, distributor, fan and the like, and the corresponding conventional chlorination furnace components can directly adopt the prior art, so that redundant description is omitted.
When the boiling chlorination furnace needs to be overhauled, people do not need to enter the furnace, only the manhole cover 7 with the plug 8 needs to be opened, and after the asbestos ropes in the manhole channel are cleaned, slag in the furnace is discharged through the manhole channel rapidly, so that the device is time-saving, labor-saving, safe and efficient. After the slag is discharged, the asbestos rope is filled up, and the manhole cover 7 is fastened.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the application.
Claims (8)
1. The heat-insulating corrosion-resistant manhole device for the overhaul of the boiling chlorination furnace is characterized in that the manhole device is arranged at a boiling section of the boiling chlorination furnace and comprises a manhole connecting pipe (2), a stainless steel pipe (3) and a manhole cover (7), the manhole connecting pipe (2) is connected with a furnace shell (1) of the boiling chlorination furnace, and the manhole cover (7) is arranged at one end, far away from the furnace shell (1), of the manhole connecting pipe (2); the stainless steel pipe (3) is arranged in the manhole connecting pipe (2), the inner wall of the manhole connecting pipe (2) is nested with the outer wall of the stainless steel pipe (3), the stainless steel pipe (3) extends towards the hearth of the boiling chlorination furnace and penetrates through the refractory layer (9) on the inner side of the furnace shell (1) until being communicated with the hearth of the boiling chlorination furnace, at least a sealing piece (6) is arranged in the pipe cavity of the stainless steel pipe (3), and the sealing piece (6) can be taken out from the stainless steel pipe (3) or put into the stainless steel pipe (3).
2. The heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace according to claim 1, wherein a refractory casting layer (4) is arranged on the inner wall of the stainless steel tube (3), a tube cavity of the stainless steel tube (3) is surrounded by the refractory casting layer (4), and the sealing piece (6) is filled in the tube cavity.
3. The heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace according to claim 2, wherein a plurality of claw nails (5) are welded on the inner wall of the stainless steel pipe (3), and the claw nails (5) are arranged in the refractory casting layer (4) and are connected with the refractory casting layer (4).
4. The heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace according to claim 1, wherein the creep rupture strength of the stainless steel pipe (3) is more than or equal to 18MPa at 900-1000 ℃; the stainless steel tube (3) is a nickel-based superalloy stainless steel tube.
5. The heat-insulating corrosion-resistant manhole device for overhauling a boiling chlorination furnace according to claim 1, wherein a gap between the outer wall of the stainless steel pipe (3) and the refractory layer (9) is filled with fireclay.
6. A heat and corrosion resistant manhole device for the overhaul of a boiling chlorination furnace according to claim 1, characterized in that the sealing element (6) is an asbestos rope.
7. The heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace according to claim 1, wherein a plug (8) is arranged on one side, facing the lumen of the stainless steel pipe (3), of the manhole cover (7), and the plug (8) extends towards the hearth of the boiling chlorination furnace and can be tightly attached to the sealing piece (6).
8. A boiling chlorination furnace, characterized in that a boiling section of the boiling chlorination furnace is provided with the heat-insulating corrosion-resistant manhole device for overhauling the boiling chlorination furnace according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310754994.5A CN116772586A (en) | 2023-06-26 | 2023-06-26 | Heat-insulating corrosion-resistant manhole device for overhauling boiling chlorination furnace and boiling chlorination furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310754994.5A CN116772586A (en) | 2023-06-26 | 2023-06-26 | Heat-insulating corrosion-resistant manhole device for overhauling boiling chlorination furnace and boiling chlorination furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116772586A true CN116772586A (en) | 2023-09-19 |
Family
ID=88013000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310754994.5A Pending CN116772586A (en) | 2023-06-26 | 2023-06-26 | Heat-insulating corrosion-resistant manhole device for overhauling boiling chlorination furnace and boiling chlorination furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116772586A (en) |
-
2023
- 2023-06-26 CN CN202310754994.5A patent/CN116772586A/en active Pending
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