CN110285428B - Method for improving reliable furnace life of incinerator and incinerator applying method - Google Patents
Method for improving reliable furnace life of incinerator and incinerator applying method Download PDFInfo
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- CN110285428B CN110285428B CN201910601367.1A CN201910601367A CN110285428B CN 110285428 B CN110285428 B CN 110285428B CN 201910601367 A CN201910601367 A CN 201910601367A CN 110285428 B CN110285428 B CN 110285428B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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Abstract
The invention discloses a method for improving the reliable furnace life of an incinerator and the incinerator applying the method, wherein the incinerator comprises a cylinder body, a special-grade thermal shock resistant brick and a bayonet structure, wherein the special-grade thermal shock resistant brick and the bayonet structure are arranged on the inner wall of the cylinder body; step two, arranging a limiting device for limiting the special-grade thermal shock resistant brick along the axis direction of the cylinder on the inner wall of the cylinder, wherein the limiting device has heat resistance; thirdly, coating a heat-resistant protective coating on the surface of the working surface of the special-grade thermal shock resistant brick; and step four, improving the bayonet structure to improve the connection strength of the bayonet structure and the barrel. The method for improving the reliable furnace life of the incinerator adopts the four protection means to be matched with each other to jointly protect the cylinder body, so that the cylinder body is prevented from being corroded and burnt, and the reliable furnace life of the incinerator is prolonged.
Description
Technical Field
The invention relates to the field of incinerators, in particular to a method for improving the reliable furnace life of an incinerator and the incinerator applying the method.
Background
In the industries of metallurgy, chemical industry, environmental protection, hazardous waste, sanitation and the like, high-temperature resistant incinerators are often needed, such as rotary incinerators, tail gas treatment incinerators, thermal oxidation incinerators (TO furnaces), regenerative thermal incinerators (RTO furnaces) and the like. The incinerator is an environment-friendly treatment and waste heat recycling device which is commonly used for treating medical wastes, domestic garbage, animal harmlessness, industrial wastes and chemical hazardous wastes. The principle is that the combustion of coal, fuel oil, fuel gas and other fuels is utilized to carry out high-temperature calcination or atomization incineration on the object to be treated so as to achieve the purpose of environmental protection, treatment and emission. In the prior art, the thermal expansion of the special-grade thermal shock resistant bricks of the incinerator is inconsistent with the thermal expansion elongation of the steel cylinder shell of the incinerator, so that the special-grade thermal shock resistant bricks are easy to misplace, a large number of triangular gaps among the special-grade thermal shock resistant bricks are formed, corrosive smoke is easy to permeate into the inner wall of the steel cylinder, the steel cylinder is corroded and burned, and the reliable service life of the incinerator is short. The reason for this phenomenon is that firstly, the bayonet structure is easy to loosen, the refractory bricks are easy to fall off, and accidents are caused to stop; secondly, the expansion amounts of the special-grade thermal shock resistant bricks and the metal cylinder are inconsistent, and the special-grade thermal shock resistant bricks are easy to misplace under the action of thermal stress; thirdly, the steel cylinder body has poor corrosion resistance and is easy to damage.
In view of the above, there is a need to design a method for increasing the reliable campaign length of an incinerator to extend the reliable campaign length of the incinerator.
Disclosure of Invention
The invention aims to provide a method for improving the reliable furnace life of an incinerator, which aims to solve the technical problem that the reliable furnace life of the incinerator is short in the prior art; the invention also aims to provide the incinerator applying the method for improving the reliable furnace life of the incinerator, so as to solve the technical problem that the reliable furnace life of the incinerator is short in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for improving the reliable furnace life of an incinerator, wherein the incinerator comprises a cylinder body, a special-grade thermal shock resistant brick and a bayonet structure, wherein the special-grade thermal shock resistant brick and the bayonet structure are arranged on the inner wall of the cylinder body;
step two, arranging the special-grade thermal shock resistant bricks on the inner wall of the cylinder body to limit the special-grade thermal shock resistant bricks along the axial direction of the cylinder body
The limiting device of (1), the limiting device having heat resistance;
thirdly, coating a heat-resistant protective coating on the surface of the working surface of the special-grade thermal shock resistant brick;
and step four, improving the bayonet structure to improve the connection strength of the bayonet structure and the barrel.
Further, the protective coating is formed by mixing and fusing glass and quartz sand.
According to the method for improving the reliable furnace life of the incinerator, the nanometer aluminum oxide metal anticorrosive paint is coated on the inner wall of the cylinder body of the incinerator through the first step, so that the cylinder body is directly protected from being damaged by smoke; step two, a limiting device is arranged to limit the special-grade thermal shock resistant bricks, so that a large number of triangular gaps among the special-grade thermal shock resistant bricks are prevented from being formed due to dislocation; thirdly, a heat-resistant protective coating is coated on the surface of the working surface of the special-grade thermal shock-resistant brick by adopting a process method, so that the corrosion and burning loss of corrosive smoke to the special-grade thermal shock-resistant brick are reduced, the thickness of a refractory lining in the middle and later periods of the furnace service is increased, the heat loss is reduced, the triangular gap and the brick gap are sealed, the barrel is protected to the maximum extent, and a better energy-saving effect is achieved; step four, improving the bayonet structure, improving the connection strength of the bayonet structure and the barrel body, and avoiding the bayonet structure from moving and falling off; the four protection means are mutually matched to jointly protect the cylinder body, so that the cylinder body is prevented from being corroded and burnt, and the reliable furnace life of the incinerator is prolonged.
The incinerator applying the method for improving the reliable furnace life of the incinerator comprises a barrel body, a special-grade thermal shock resistant brick and a bayonet structure, wherein the special-grade thermal shock resistant brick and the bayonet structure are arranged on the inner wall of the barrel body, and nano aluminum oxide metal anticorrosive paint is coated on the inner wall of the barrel body; a heat-resistant limiting device is fixedly arranged on the inner wall of the barrel and is used for limiting the special-grade thermal shock resistant brick along the axial direction of the barrel; a compact high-temperature resistant protective coating is also arranged on the working surface of the special-grade thermal shock resistant brick; the bayonet structure comprises a protective iron, a first metal anchoring part, a second metal anchoring part and a pouring body, wherein the protective iron is fixedly connected with the inner wall of the barrel, one end of the first metal anchoring part is fixedly arranged on the protective iron, the other end of the first metal anchoring part is fixedly arranged in the pouring body, one end of the second metal anchoring part is fixedly arranged in the pouring body, the other end of the second metal anchoring part is fixedly connected to the inner wall of the barrel, and the pouring body and an adjacent special-grade thermal shock resistant brick are in blocking fit in the axial direction of the barrel.
Furthermore, a high-strength thermal shock resistant insulating brick is arranged between the special thermal shock resistant brick and the inner wall of the barrel.
Further, the special-grade thermal shock resistant brick and the high-strength thermal shock resistant insulating brick are constructed in a staggered joint mode.
Further, a light high-strength heat-insulating castable is arranged between the special-grade thermal shock resistant brick and the inner wall of the barrel.
Further, the protective coating is formed by mixing and fusing glass and quartz sand.
According to the incinerator applying the method for improving the reliable service life of the incinerator, the nano aluminum oxide metal anticorrosive paint is coated on the inner wall of the barrel, the limiting device for limiting the special-grade thermal shock resistant brick along the axial direction of the barrel is arranged on the inner wall of the barrel, the heat-resistant protective coating is coated on the working surface of the special-grade thermal shock resistant brick, the bayonet structure is improved, the connection strength of the bayonet structure and the barrel is improved, the barrel is protected by the cooperation of the four protection means, the corrosion resistance of the inner wall of the barrel is enhanced, the inner wall of the barrel is protected from being corroded and damaged, the falling of refractory bricks is avoided, and the reliable service life of the incinerator is prolonged.
Drawings
FIG. 1 is a schematic structural view of an incinerator of embodiment 1 of the present invention to which a method for improving the reliable campaign length of the incinerator is applied;
FIG. 2 is an enlarged view of a portion of the structure of FIG. 1 at A;
FIG. 3 is a schematic diagram of the configuration of the limiting group shown in FIG. 1;
fig. 4 is a schematic structural view of the bayonet group in fig. 1.
FIG. 5 is a schematic view showing a partial structure of an incinerator in accordance with embodiment 2 of the present invention to which a method for improving the reliable campaign length of the incinerator is applied.
In the figure: 1. protecting the iron; 2. a bolt; 3. a barrel; 41. a first metal anchor; 42. a second metal anchor; 5. a ceramic fiber blanket; 6. special grade thermal shock resistant bricks; 7. high-strength thermal shock resistant insulating bricks; 8. pouring a building body; 9. high-temperature daub; 10. nano aluminum oxide metal anticorrosive paint; 11. a limiting device; 12. the gap is expanded.
Detailed Description
An incinerator to which the method for improving the reliable life of the incinerator according to the present invention is applied will be described in detail with reference to the accompanying drawings.
The embodiment 1 of the incinerator applying the method for improving the reliable furnace life of the incinerator is shown in figures 1-4, and comprises a cylinder 3 and high-strength thermal shock resistant insulating bricks 7 arranged on the inner wall of the cylinder 3, wherein the thermal insulation function of the incinerator is realized through the arrangement of the high-strength thermal shock resistant insulating bricks 7, and the heat loss is avoided. The inner side surface of the high-strength thermal shock resistant insulating brick 7 is also provided with a special thermal shock resistant brick 6, and the special thermal shock resistant brick 6 and the high-strength thermal shock resistant insulating brick 7 are constructed by staggered joints. Wherein, a compact protective coating (not shown in the figure) is also arranged on the working surface of the inner side of the special thermal shock resistant brick 6, and the protective coating is formed by mixing and melting glass and quartz sand. The protective coating is arranged on the working surface of the inner side of the special-grade thermal shock resistant brick 6 by adopting the following steps of firstly, controlling the rotating speed of the incinerator to be 0.2-0.3r/min, generally to be 0.25r/min, and stably maintaining the rotating speed unchanged during the construction of the protective coating;
measuring the flame smoke temperature of the high-temperature section by using an infrared thermometer, starting to heat to 1100 ℃ by taking the smoke temperature of the part as a reference, and starting to fire a protective layer material to build a coating;
step three, adopting glass and quartz sand as protective layer materials, firing the glass and the quartz sand according to the mass percent of 1:1 in the firing process, adjusting the proportion once every 2.5 hours by increasing the quartz sand, and gradually increasing the proportion to 1:4 according to the sequence of 1:2 and 1:3 until the quartz sand is completely fired;
coating a protective layer with the thickness of 80-100mm on the inner working surface of the special-grade thermal shock resistant brick;
and step five, after the protective layer is built, performing infrared scanning temperature measurement on the whole incinerator shell by adopting infrared scanning equipment, establishing basic data, and repeating the step one to the step four until the incinerator shell is in a normal temperature state if a large-area high-temperature region exists in the incinerator shell in the operation process.
A heat-resistant limiting device 11 is fixedly arranged on the inner wall of the barrel 3, the limiting device 11 protrudes out of the inner wall of the barrel 3 along the radial direction of the barrel 3, and the limiting device 11 and the special-grade thermal shock resistant brick 6 are in blocking fit in the axial direction of the barrel 3 to limit the high-strength thermal shock resistant insulating brick 7 and the special-grade thermal shock resistant brick 6. One side, close to the inner wall of the barrel 3, of the special-grade thermal shock resistant brick 6 for being in blocking fit with the limiting device 11 is provided with a clamping groove for the limiting device 11 to be adaptive to be clamped in, and the limiting device 11 is clamped in the clamping groove of the special-grade thermal shock resistant brick 6 through one end to achieve a limiting function. Be provided with nanometer aluminium oxide metal anticorrosive paint layer 10 on the inner wall of barrel 3, stop device 11 welds on the inner wall of barrel 3, and welding process must reach full weld II level standard more than, and stop device 11 and welding seam are provided with nanometer aluminium oxide metal anticorrosive paint layer 10. In addition, the outer surface of the limiting device 11 is also provided with a ceramic fiber blanket 5 serving as an expansion reserved seam for releasing thermal stress. Wherein, stop device 11 sets up in groups and forms the limit group, and the stop device 11 of each limit group evenly separates along the circumference of the inner wall of barrel 3 and sets up, and each limit group separates along the axis direction interval of barrel 3 and sets up, and the interval between the adjacent stop device 11 is as stop device 11's expansion gap. The two limit groups are respectively arranged at the middle position and the discharge end position of the incinerator, each limit group comprises 6 limit devices 11, and the interval between every two adjacent limit devices 11 is 10-20 mm.
The incinerator applying the method for improving the reliable service life of the incinerator further comprises a bayonet structure, the bayonet structure comprises a protective iron 1, a first metal anchoring piece 41, a second metal anchoring piece 42 and a casting body 8, the protective iron 1 is fixedly connected with the inner wall of the barrel 3, one end of the first metal anchoring piece 41 is fixedly arranged on the protective iron 1, the other end of the first metal anchoring piece 41 is fixedly arranged inside the casting body 8, one end of the second metal anchoring piece 42 is fixedly arranged in the casting body 8, the other end of the second metal anchoring piece is fixedly connected with the inner wall of the barrel 3, and the casting body 8 and an adjacent super thermal shock resistant brick 6 are in blocking fit in the axial direction of the barrel 3. Wherein, protection iron 1 passes through bolt 2 fixed connection with barrel 3 inner wall, and the one end welding of first metal anchor member 41 is on protection iron 1, and the other end welding of second metal anchor member 42 is on barrel 3 inner wall, all is provided with waterproof pitch on first metal anchor member 41 and the second metal anchor member 42. In addition, the inside surfaces of the protection iron 1 and the cylinder 3 are both provided with nano aluminum oxide metal anticorrosive paint 10. And a ceramic fiber blanket 5 is stuck and arranged on the side surface of the special-grade thermal shock resistant brick 6 in stop fit with the pouring body 8 through high-temperature cement mortar 9. Wherein, the bayonet socket structure sets up in groups and forms bayonet socket group, and each bayonet socket structure of bayonet socket group sets up along the circumference of the inner wall of barrel 3, leaves the inflation clearance between each bayonet socket structure.
The incinerator adopting the method for improving the reliable service life of the incinerator adopts nano aluminum oxide metal anticorrosive paint as a basic protective layer of an incinerator barrel, forms a multilayer corrosion-resistant protective structure of the incinerator barrel together with a special-grade thermal shock resistant brick, a compact protective coating on the inner working surface of the special-grade thermal shock resistant brick and a high-strength thermal shock resistant insulating brick (or a light high-strength heat-insulating pouring material), and then combines a limiting device and a bayonet structure to limit the expansion deformation dislocation of the special-grade thermal shock resistant brick, so that a large number of triangular gaps among the special-grade thermal shock resistant bricks are prevented from being formed, the refractory bricks are prevented from falling off, the barrel is protected from being corroded and burnt, and the reliable service life of the incinerator barrel is prolonged.
In other embodiments, each bayonet structure can be arranged independently without forming a bayonet group, and the number and the arrangement position of the bayonet structures can be arranged as required.
In other embodiments, the ceramic fiber blanket may not be provided on the side of the special grade thermal shock resistant brick that engages the casting stop.
In other embodiments, the protective iron and the inner surface of the cylinder body can be provided with no nano aluminum oxide metal anticorrosive paint.
In other embodiments, the first metal anchor and the second metal anchor may not be provided with waterproof asphalt.
In other embodiments, one end of the first metal anchor can be bolted to the protective iron, and the other end of the second metal anchor can be bolted to the inner wall of the barrel.
In other embodiments, the protection iron and the inner wall of the cylinder body can be welded and fixed.
In other embodiments, the limiting device may not be provided.
In other embodiments, the high-strength thermal shock resistant insulating brick between the special-grade thermal shock resistant brick and the inner wall of the barrel body can be replaced by a light-weight high-strength heat insulation pouring material.
In other embodiments, the special-grade thermal shock resistant brick and other heat-insulating materials are made into an integrated composite material to be used as the lining of the cylinder body.
In other embodiments, the protective coating may be made of other heat resistant materials.
In other embodiments, the inner working surface of the special grade thermal shock resistant brick may not be provided with a protective coating, and the corrosion resistance of the special grade thermal shock resistant brick is reduced.
In other embodiments, no high-strength thermal shock resistant insulating brick is arranged between the special thermal shock resistant brick and the inner wall of the barrel.
The invention relates to a method for improving the reliable furnace life of an incinerator, which comprises a cylinder body, a special-grade thermal shock resistant brick arranged on the inner wall of the cylinder body and a bayonet structure, and comprises the following steps of firstly, coating nano aluminum oxide metal anticorrosive paint on the inner wall of the cylinder body of the incinerator; step two, arranging a limiting device for limiting the special-grade thermal shock resistant brick along the axis direction of the cylinder on the inner wall of the cylinder, wherein the limiting device has heat resistance; thirdly, coating a heat-resistant protective coating on the surface of the working surface of the special-grade thermal shock resistant brick; and step four, improving the bayonet structure to improve the connection strength of the bayonet structure and the barrel.
The method comprises the following steps of firstly, controlling the rotation speed of an incinerator to be 0.2-0.3r/min, generally to be 0.25r/min, and stably maintaining the rotation speed unchanged during the construction of a protective layer;
measuring the flame smoke temperature of the high-temperature section by using an infrared thermometer, starting to heat to 1100 ℃ by taking the smoke temperature of the part as a reference, and starting to fire a protective layer material to build a coating;
step three, adopting glass and quartz sand as protective layer materials, firing the glass and the quartz sand according to the mass percent of 1:1 in the firing process, adjusting the proportion once every 2.5 hours by increasing the quartz sand, and gradually increasing the proportion to 1:4 according to the sequence of 1:2 and 1:3 until the quartz sand is completely fired;
coating a protective layer with the thickness of 80-100mm on the inner working surface of the special-grade thermal shock resistant brick;
and step five, after the protective layer is built, performing infrared scanning temperature measurement on the whole incinerator shell by adopting infrared scanning equipment, establishing basic data, and repeating the step one to the step four until the incinerator shell is in a normal temperature state if a large-area high-temperature region exists in the incinerator shell in the operation process.
In other embodiments, step five may be omitted, and the temperature of the incinerator housing is not detected, so that the heat and corrosion resistance of the incinerator cannot be ensured.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The method for improving the reliable furnace life of the incinerator comprises a barrel, special-grade thermal shock resistant bricks arranged on the inner wall of the barrel and a bayonet structure, and is characterized in that: the method comprises the following steps of firstly, coating nano aluminum oxide metal anticorrosive paint on the inner wall of a cylinder body of the incinerator;
step two, arranging a limiting device for limiting the special-grade thermal shock resistant brick along the axis direction of the cylinder on the inner wall of the cylinder, wherein the limiting device has heat resistance;
thirdly, coating a heat-resistant protective coating on the surface of the working surface of the special-grade thermal shock resistant brick;
improving the bayonet structure to improve the connection strength of the bayonet structure and the barrel;
in the third step, the protective coating is arranged on the inner working surface of the special thermal shock resistant brick by adopting the following steps of:
step one, controlling the rotating speed of the incinerator to be 0.2-0.3r/min, and stably maintaining the rotating speed unchanged during the construction of a protective coating;
measuring the flame smoke temperature of the high-temperature section by using an infrared thermometer, starting to heat to 1100 ℃ by taking the smoke temperature of the part as a reference, and starting to fire a protective layer material to build a coating;
step three, adopting glass and quartz sand as protective layer materials, firing the glass and the quartz sand according to the mass percent of 1:1 in the firing process, adjusting the proportion once every 2.5 hours by increasing the quartz sand, and gradually increasing the proportion to 1:4 according to the sequence of 1:2 and 1:3 until the quartz sand is completely fired;
coating a protective layer with the thickness of 80-100mm on the inner working surface of the special-grade thermal shock resistant brick;
and step five, after the protective layer is built, performing infrared scanning temperature measurement on the whole incinerator shell by adopting infrared scanning equipment, establishing basic data, and repeating the step one to the step four until the incinerator shell is in a normal temperature state if a large-area high-temperature region exists in the incinerator shell in the operation process.
2. The method for improving the reliable campaign of incinerator according to claim 1, characterized by: the protective coating is formed by mixing and fusing glass and quartz sand.
3. An incinerator using the method for improving the reliable campaign of the incinerator according to any one of claims 1 to 2, comprising a barrel, super thermal shock resistant bricks arranged on the inner wall of the barrel, and a bayonet structure, wherein: the inner wall of the cylinder body is coated with nano aluminum oxide metal anticorrosive paint; a heat-resistant limiting device is fixedly arranged on the inner wall of the barrel and is used for limiting the special-grade thermal shock resistant brick along the axial direction of the barrel; a compact high-temperature resistant protective coating is also arranged on the working surface of the special-grade thermal shock resistant brick; the bayonet structure comprises a protective iron, a first metal anchoring part, a second metal anchoring part and a pouring body, wherein the protective iron is fixedly connected with the inner wall of the barrel, one end of the first metal anchoring part is fixedly arranged on the protective iron, the other end of the first metal anchoring part is fixedly arranged in the pouring body, one end of the second metal anchoring part is fixedly arranged in the pouring body, the other end of the second metal anchoring part is fixedly connected to the inner wall of the barrel, and the pouring body and an adjacent special-grade thermal shock resistant brick are in blocking fit in the axial direction of the barrel.
4. An incinerator using a method for improving the reliable campaign of incinerator according to claim 3, characterized in that: and a high-strength thermal shock resistant insulating brick is also arranged between the special thermal shock resistant brick and the inner wall of the barrel.
5. An incinerator using a method for improving the reliable campaign of incinerator according to claim 4, characterized in that: and the special-grade thermal shock resistant bricks and the high-strength thermal shock resistant insulating bricks are constructed in a staggered joint manner.
6. An incinerator using a method for improving the reliable campaign of incinerator according to claim 3, characterized in that: and a light high-strength heat-insulating castable is also arranged between the special-grade thermal shock-resistant brick and the inner wall of the barrel.
7. An incinerator using a method for improving the reliable campaign of incinerator according to claim 3, characterized in that: the protective coating is formed by mixing and fusing glass and quartz sand.
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| KR100693838B1 (en) * | 2005-06-23 | 2007-03-12 | 주식회사 포스렉 | A Rotary Kiln Type Incinerator |
| CN201242343Y (en) * | 2008-07-17 | 2009-05-20 | 韩亚伟 | Front kiln mouth of rotary kiln |
| CN206706037U (en) * | 2017-04-18 | 2017-12-05 | 新能能源有限公司 | A kind of fluidized-bed gasification furnace |
| CN106931785A (en) * | 2017-05-04 | 2017-07-07 | 郑州慧合中赢科技有限公司 | A kind of refractory enclosure |
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| CN205957697U (en) * | 2016-05-31 | 2017-02-15 | 湖南省冶金规划设计院 | Rotary kiln is decreased in solar heat protection |
| CN106679426A (en) * | 2016-12-24 | 2017-05-17 | 安徽芜湖海螺建筑安装工程有限责任公司 | Application method for adding anti-corrosion and thermal-insulation material into shell of cement rotary kiln |
| CN107629498A (en) * | 2017-11-03 | 2018-01-26 | 周炳利 | A kind of graphene quantum dot composite refractory coating and preparation method thereof |
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