CN214406088U - Rotary kiln for hazardous waste incineration - Google Patents
Rotary kiln for hazardous waste incineration Download PDFInfo
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- CN214406088U CN214406088U CN202120333706.5U CN202120333706U CN214406088U CN 214406088 U CN214406088 U CN 214406088U CN 202120333706 U CN202120333706 U CN 202120333706U CN 214406088 U CN214406088 U CN 214406088U
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Abstract
The utility model discloses a rotary kiln for hazardous waste incineration, which comprises a kiln steel shell, a front kiln head area, a kiln middle area and a kiln tail area which are sequentially arranged along the axial direction of the kiln steel shell, wherein a first heat insulation layer and a first flame retardant coating arranged on the first heat insulation layer are laid in the kiln head area along the circumferential direction of the kiln steel shell; a second heat insulation layer and a second fire-resistant layer arranged on the second heat insulation layer are laid in the middle area of the kiln along the circumferential direction of the kiln steel shell; and a third heat insulation layer and a third fire-resistant layer arranged on the third heat insulation layer are laid in the kiln tail area along the circumferential direction of the kiln steel shell. According to the utility model discloses a change kiln for dangerous useless incineration can avoid the whole slump of kiln brick effectively in the course of the work, the huge safety risk of greatly reduced equipment operation.
Description
Technical Field
The utility model relates to a useless burning furnace that burns of danger, in particular to change kiln that is used for useless burning of danger.
Background
The rotary kiln of the hazardous waste incinerator is a main incineration and treatment facility for solid and liquid hazardous wastes. The daily treatment capacity of the incinerator is about 300 tons or more, the size of the rotary kiln is about 2800mm multiplied by 9000mm, the rotating speed is 1R/min, the normal working temperature is 870 ℃, the limiting temperature is 1000 ℃, the fuel is natural gas, the material property and the components of dangerous waste are very complex, and petroleum coke, garbage, medical waste, waste oil and other chemical byproducts are mainly used; solid, liquid, solid-liquid mixed state, and the like, all of which are mixtures of various kinds; the package is mainly barreled and boxed, and is loaded in a waste plastic barrel or box with 25-50 Kg/barrel.
The kiln brick commonly used in the rotary kiln of the hazardous waste incinerator at present is a double-layer structure of chrome corundum or andalusite brick and clay brick.
There are problems: after the rotary kiln of the hazardous waste incinerator runs for a period of time, as barreled waste or boxed waste slides off from the chute at a high speed, the waste barrel is hammered on chrome corundum or andalusite on the upper working face of the kiln head, the chrome corundum or andalusite on the upper working face has enough high-temperature strength to bear the impact, but the high-temperature strength of the heat-insulating clay brick on the lower layer is insufficient and cannot bear the large impact load, so that the heat-insulating clay brick on the lower layer is broken, and the broken clay brick is continuously extruded, rubbed and pulverized in the continuous rotation process of the kiln body; the volume of partial clay bricks is reduced to form cavities, so that the chromium corundum or andalusite bricks on the upper working surface are loosened and collapsed; the other part of clay bricks are stacked too densely to cause the stacking to be too dense, so that the chromium corundum or andalusite bricks on the upper working surface are loosened and bulged, the chromium corundum or andalusite bricks on the upper working surface are loosened and fall off, and even the whole kiln bricks are collapsed to cause huge safety risk of equipment operation.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough that prior art exists, the utility model aims to solve one or more problems that exist among the above-mentioned prior art.
The utility model provides a rotary kiln for hazardous waste incineration, which comprises a kiln steel shell, wherein the kiln steel shell is in a cylindrical shape and comprises a front kiln head area, a kiln middle area and a kiln tail area which are sequentially arranged along the axial direction of the kiln steel shell, and a first heat insulation layer and a first fire resistance layer arranged on the first heat insulation layer are laid in the kiln head area along the circumferential direction of the kiln steel shell; a second heat insulation layer and a second fire-resistant layer arranged on the second heat insulation layer are laid in the middle area of the kiln along the circumferential direction of the kiln steel shell, the thickness of the second heat insulation layer in the radial direction of the kiln steel shell is larger than that of the first heat insulation layer in the radial direction of the kiln steel shell, and the thickness of the second fire-resistant layer in the radial direction of the kiln steel shell is smaller than that of the first fire-resistant layer in the radial direction of the kiln steel shell; and a third heat insulation layer and a third fire-resistant layer arranged on the third heat insulation layer are laid in the kiln tail area along the circumferential direction of the kiln steel shell, the thickness of the third heat insulation layer in the radial direction of the kiln steel shell is equal to that of the first heat insulation layer in the radial direction of the kiln steel shell, and the thickness of the third fire-resistant layer in the radial direction of the kiln steel shell is equal to that of the first fire-resistant layer in the radial direction of the kiln steel shell.
According to the utility model discloses an embodiment, be provided with the anchor assembly that is used for consolidating first flame retardant coating, second flame retardant coating and third flame retardant coating in the preceding kiln head district.
According to an embodiment of the invention, the mid-kiln region comprises a first portion and a third portion and a second portion located between the first portion and the third portion, and the second thermal insulation layer laid in the first portion and the third portion has a thickness in the radial direction of the kiln steel shell which is larger than the thickness in the radial direction of the kiln steel shell of the second thermal insulation layer laid in the second portion.
According to an embodiment of the present invention, the first and third thermal insulation layers include one of a nano ceramic fiber reflective insulation panel, woven ceramic fiber cloth, and ceramic fiber paper, and the first thermal insulation layer is different from the third thermal insulation layer.
According to an embodiment of the utility model, the second heat insulation layer is the clay brick.
According to the utility model discloses an embodiment, first flame retardant coating to third flame retardant coating are chromium corundum brick or andalusite brick.
According to the utility model discloses an embodiment, the rotary kiln still includes and sets up the jam plate between the chromium corundum brick or between the andalusite brick along the circumference direction of kiln steel casing with predetermined interval.
According to the utility model discloses an embodiment sets up the locking jam plate that quantity is more than or equal to 8 along the circumference direction of kiln steel casing.
According to the utility model discloses an embodiment, locking plug plate embedding degree of depth is 2/3 of radial direction's thickness for chromium corundum brick or andalusite brick to the width is 150 mm.
According to the utility model discloses an embodiment, the rotary kiln still includes sets up the kiln head band on the outer wall of kiln steel casing in the first part in the district in the kiln and sets up the kiln tail band on the outer wall of kiln steel casing in the third part in the district in the kiln.
The utility model provides a rotary kiln for hazardous waste incineration can protect the inner lining of the incinerator under the normal working condition, avoid being damaged by the impact of barreled waste, boxed waste and massive waste, prolong the service life of the inner lining of the incinerator, at least ensure the service life of the refractory material lining of the kiln body to meet the requirement of an overhaul period of 4-5 years, simultaneously avoid the collapse of kiln bricks to cause huge safety risk, improve the heat preservation effect, save energy and reduce consumption; meanwhile, the maintenance frequency is greatly reduced, the manufacturing and maintenance difficulty is also reduced, the manufacturing and installation efficiency is improved, and the maintenance and operation cost is saved.
Drawings
The above and/or other objects and advantages of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a cross-sectional view of a kiln for hazardous waste incineration according to an embodiment of the invention;
FIG. 2 shows a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 shows a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 shows a cross-sectional view taken along line C-C of FIG. 1;
FIG. 5 shows an enlarged view of a portion of FIG. 1 at the circle;
fig. 6 shows a schematic view of a first anchor for a kiln for hazardous waste incineration according to an embodiment of the present invention;
fig. 7 shows a schematic view of a second anchor for a kiln for hazardous waste incineration according to an embodiment of the invention;
fig. 8A and 8B show a front view and a top view, respectively, of standard bricks of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention;
fig. 9A to 9C show a front view, a top view and a side view, respectively, of a profiled brick of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention;
fig. 10A to 10C show a front view, a top view and a side view, respectively, of another profiled brick of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention.
Detailed Description
The embodiments are described below in order to explain the present invention by referring to the figures. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows a section view of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention. Fig. 2 shows a cross-sectional view taken along line a-a of fig. 1. Fig. 3 shows a cross-sectional view taken along line B-B of fig. 1. Fig. 4 shows a cross-sectional view taken along line C-C of fig. 1. Fig. 5 shows a partial enlarged view at a circle in fig. 1. Fig. 6 shows a schematic view of a first anchoring element of a kiln for hazardous waste incineration according to an embodiment of the present invention. Fig. 7 shows a second anchor assembly schematic diagram of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention. Fig. 8A and 8B show front view and top view respectively of the standard brick of the rotary kiln stove for hazardous waste incineration according to the embodiment of the present invention. Fig. 9A to 9C show a front view, a top view and a side view, respectively, of a profiled brick of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention. Fig. 10A to 10C show a front view, a top view and a side view, respectively, of another profiled brick of a rotary kiln for hazardous waste incineration according to an embodiment of the present invention.
Referring to fig. 1 to 10C, a rotary kiln 10 for hazardous waste incineration according to an embodiment of the present invention includes a kiln steel housing 400, the kiln steel housing 400 has a cylindrical shape, and includes a front kiln head region S500, a kiln head region S100, a middle kiln region S200, and a kiln tail region S300 sequentially arranged along an axial direction of the kiln steel housing 400, and a first thermal insulation layer 110 and a first fire resistance layer 120 disposed on the first thermal insulation layer 110 are laid in the kiln head region S100 along a circumferential direction of the kiln steel housing 400; a second heat insulating layer 210 and a second fire-resistant layer 220 disposed on the second heat insulating layer 210 are laid in the circumferential direction of the kiln steel shell 400 in the middle kiln region S200, the thickness of the second heat insulating layer 210 in the radial direction of the kiln steel shell 400 is greater than the thickness of the first heat insulating layer 110 in the radial direction of the kiln steel shell 400, and the thickness of the second fire-resistant layer 220 in the radial direction of the kiln steel shell 400 is less than the thickness of the first fire-resistant layer 120 in the radial direction of the kiln steel shell 400; a third heat insulating layer 310 and a third refractory layer 320 provided on the third heat insulating layer 310 are laid in the kiln tail section S300 in the circumferential direction of the kiln steel shell 400, the thickness of the third heat insulating layer 310 in the radial direction of the kiln steel shell 400 is equal to the thickness of the first heat insulating layer 110 in the radial direction of the kiln steel shell 400, and the thickness of the third refractory layer 320 in the radial direction of the kiln steel shell is equal to the thickness of the first refractory layer 120 in the radial direction of the kiln steel shell 400.
Furthermore, an anchor 500 for reinforcing the first, second and third refractory layers 120, 220 and 320 is provided in the front kiln head region S500, wherein the anchor comprises a first anchor 510 and a second anchor 520 fixed to the inner surface of the kiln steel shell 400 via welding.
The first anchor 510 and the second anchor 520 each have a first plate and a second plate extending from a first end of the first plate at an angle of 60 ° to the first plate. Further, the first anchor 510 and the second anchor 520 may be prepared by any suitable material.
Further, the middle kiln region S200 includes a first portion S210 and a third portion S230 and a second portion S220 located between the first portion S210 and the third portion S230, and a thickness of the second thermal insulation layer 210 laid in the first portion S210 and the third portion S230 in the radial direction of the kiln steel casing 400 is greater than a thickness of the second thermal insulation layer 210 laid in the second portion S220 in the radial direction of the kiln steel casing 400.
Further, the first and third thermal insulation layers 110 and 310 include one of a nano ceramic fiber reflective insulation panel, a woven ceramic fiber cloth, and a ceramic fiber paper, and the first and third thermal insulation layers 110 and 310 are different.
Further, the second insulating layer 210 is a clay brick.
In addition, the first to third refractory layers 120 to 320 are chrome corundum bricks or andalusite bricks. Specifically, the first refractory layer 120 and the third refractory layer 320 are chrome corundum profile bricks or andalusite profile bricks. The second refractory layer 220 is a standard brick of chrome corundum or andalusite.
In addition, the rotary kiln 10 further includes anti-loosening plates 700 disposed between the chrome corundum bricks or between the andalusite bricks at predetermined intervals in the circumferential direction of the kiln steel shell 400.
Further, the anti-loosening plates 700 are provided in a number of 8 or more in the circumferential direction of the kiln steel shell 400.
Further, the anti-loosening plate 700 is embedded in 2/3 having a depth of the thickness of the chrome corundum brick or andalusite brick in the radial direction and a width of 150 mm.
In addition, the kiln 10 further includes a crown band 610 provided on the outer wall of the kiln steel shell 400 in the first section S210 of the middle kiln section S200 and a tail band 620 provided on the outer wall of the kiln steel shell 400 in the third section S230 of the middle kiln section S200.
The specific implementation process of the embodiment is as follows:
referring to fig. 1, the rotary kiln 10 for hazardous waste incineration according to the present embodiment is constructed in a circumferential circle-by-circle manner, and is constructed by a kiln tail region S300 and a front kiln head region S500. The front kiln head area S500 is built by the kiln tail area S300, wherein the building turns ratio of the kiln head area S100, the first part S210 and the third part S220 of the middle kiln area S200, the third part S230 of the middle kiln area S200 and the kiln tail area S300 is 5:10:17:10: 5.
The kiln tail area S300 is positioned between the marks of 43-47 circles, wherein the third heat insulation layer 310 of the kiln tail area S300 comprises one of woven ceramic fiber cloth, ceramic fiber paper (about 5 mm) or a film-coated pressure-resistant nano ceramic fiber reflective heat insulation plate (about 5 mm), and preferably one of the woven ceramic fiber cloth and the ceramic fiber paper (about 5 mm); the third refractory layer 320 of the kiln tail section S300 includes one of a chrome corundum profile brick and an andalusite profile brick.
In the embodiment of the present invention, the special-shaped bricks refer to that a portion located at a corner of a standard brick (as shown in fig. 8A to 8B) is removed on the basis of the standard brick. Specifically, as shown in fig. 9A to 9C and fig. 10A to 10C, a part of a corner of the standard brick is removed (for example, the removed part may be rectangular or trapezoidal in a plan view).
The dimensions of the standard tile (first width a1, second width a2, height b, and length c) are set forth in table 1 below.
TABLE 1
The dimensions of the profiled tiles (first width a1, second width a2, height b and length c) and the dimensions of the removed portions (first height d, third width e and difference f between lower and upper base when the removed portions are trapezoidal) are as follows 2.
TABLE 2
A third part S230 of the middle area S200 of the kiln is positioned between 33-42 circles, wherein the second heat insulating layer 210 of the third part S230 is clay brick (80 mm); the second refractory layer 220 of the third portion S230 comprises one of chrome corundum or andalusite standard brick. A second part S220 of the middle area S200 of the kiln is positioned between 16-32 circles of the reference number, wherein a second heat insulation layer 210 of the second part S220 is clay brick (50 mm); the second refractory layer 220 of the third portion S230 comprises one of chrome corundum or andalusite standard brick. The first part S210 of the middle area S200 of the kiln is positioned between 6-15 circles of the reference number, wherein the second heat insulation layer 210 of the first part S210 is clay brick (80 mm); the second refractory layer 220 of the third portion S230 comprises one of chrome corundum or andalusite standard brick.
The kiln head area S100 is positioned between 1-5 circles of marks, wherein the first thermal insulation layer 110 of the kiln head area S100 comprises one of a film-coated pressure-resistant nano ceramic fiber reflective thermal insulation plate (about 5 mm) or woven ceramic fiber cloth or ceramic fiber paper (about 5 mm), and preferably the film-coated pressure-resistant nano ceramic fiber reflective thermal insulation plate (about 5 mm); the first refractory layer 120 of the kiln head region S100 comprises one of chrome corundum or andalusite shaped bricks.
After the construction is completed, the first anchoring piece 510 and the second anchoring piece 520 are welded on the inner surface of the kiln steel shell 400, the mold is supported in sections, the casting material is poured in sections, and the solidified casting material is used for limiting the large axial displacement of the first heat insulation layer 110 and the first fire-resistant layer 120 of the kiln head area S100, so that the axial and integral stability of the kiln brick of the kiln body is ensured.
Referring to fig. 2 to 4, between each circle of the chrome corundum or andalusite brick of the refractory layer, there are provided 8 or more anti-loosening plates 700 in the circumferential direction of the kiln steel shell 400, and preferably, the anti-loosening plates 700 are embedded in 2/3 having a depth of the thickness of the chrome corundum brick or andalusite brick in the radial direction and a width of 150 mm. The anti-loosening plate 700 is made of Q235B steel. The setting mode of the anti-loosening plug plate 700 is as follows: after the whole ring of the fire-resistant layer is built, a hammering method is adopted, the fire-resistant layer is forcibly inserted and knocked into the space between two bricks, and during operation, the steel anti-loosening plug plate expands in volume due to oxidation, and the chrome corundum or andalusite is tensioned along the circumferential direction; the steel anti-loosening plug plate oxidized at high temperature can form a semi-molten mixture with the chromium corundum or andalusite, and two adjacent chromium corundum or andalusite bricks are firmly combined into a whole, so that the radial stability of a single-ring kiln brick of the kiln body is ensured.
According to the rotary kiln for hazardous waste incineration provided by the embodiment of the utility model, the inner lining of the incinerator can be protected under the normal working state, the damage caused by the impact of barreled waste, boxed waste and massive waste is avoided, the service cycle of the inner lining of the incinerator is prolonged, the service life of the refractory material lining of the kiln body can be at least ensured to meet the requirement of an overhaul period of 4-5 years, the huge safety risk caused by the collapse of kiln bricks is avoided, the heat preservation effect is improved, the energy is saved, and the consumption is reduced; meanwhile, the maintenance frequency is greatly reduced, the manufacturing and maintenance difficulty is also reduced, the manufacturing and installation efficiency is improved, and the maintenance and operation cost is saved.
It is to be understood that the present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims. The utility model is not limited to the length of the existing hazardous waste incinerator, and can be suitable for the structural design of other rotary kiln refractory linings with various lengths; the utility model discloses also not be limited to the useless burning furnace that burns of danger, the structural design of applicable other rotary kiln refractory lining simultaneously.
Claims (10)
1. A rotary kiln for hazardous waste incineration is characterized by comprising a kiln steel shell, wherein the kiln steel shell is in a cylindrical shape and comprises a front kiln head area, a kiln middle area and a kiln tail area which are sequentially arranged along the axial direction of the kiln steel shell,
a first heat insulation layer and a first fire-resistant layer arranged on the first heat insulation layer are laid in the kiln head area along the circumferential direction of the kiln steel shell;
a second heat insulation layer and a second fire-resistant layer arranged on the second heat insulation layer are laid in the middle area of the kiln along the circumferential direction of the kiln steel shell, the thickness of the second heat insulation layer in the radial direction of the kiln steel shell is larger than that of the first heat insulation layer in the radial direction of the kiln steel shell, and the thickness of the second fire-resistant layer in the radial direction of the kiln steel shell is smaller than that of the first fire-resistant layer in the radial direction of the kiln steel shell;
and a third heat insulation layer and a third fire-resistant layer arranged on the third heat insulation layer are laid in the kiln tail area along the circumferential direction of the kiln steel shell, the thickness of the third heat insulation layer in the radial direction of the kiln steel shell is equal to that of the first heat insulation layer in the radial direction of the kiln steel shell, and the thickness of the third fire-resistant layer in the radial direction of the kiln steel shell is equal to that of the first fire-resistant layer in the radial direction of the kiln steel shell.
2. The rotary kiln furnace of claim 1, wherein anchors are provided in the forehearth region for reinforcing the first, second and third refractory layers.
3. The rotary kiln furnace according to claim 1, wherein the kiln center region includes a first portion and a third portion and a second portion located between the first portion and the third portion, and a thickness of the second thermal insulation layer laid in the first portion and the third portion in a radial direction of the kiln steel casing is larger than a thickness of the second thermal insulation layer laid in the second portion in the radial direction of the kiln steel casing.
4. The rotary kiln furnace according to claim 1, wherein the first and third thermal insulation layers comprise one of a nano ceramic fiber reflective insulation panel, a woven ceramic fiber cloth, and a ceramic fiber paper, and the first thermal insulation layer is different from the third thermal insulation layer.
5. A rotary kiln according to claim 1 or 4, characterized in that the second insulating layer is clay brick.
6. The rotary kiln furnace according to claim 1, wherein the first through third refractory layers are chrome corundum bricks or andalusite bricks.
7. The rotary kiln furnace according to claim 6, further comprising anti-loosening plates disposed between the chrome corundum bricks or between the andalusite bricks at predetermined intervals in a circumferential direction of the kiln steel casing.
8. The rotary kiln furnace according to claim 7, wherein a number of the anti-loosening plug plates is greater than or equal to 8 in the circumferential direction of the kiln steel shell.
9. The rotary kiln according to claim 8, wherein the anti-loosening plate is embedded to a depth of 2/3 the thickness of the chrome corundum brick or andalusite brick in the radial direction and to a width of 150 mm.
10. The rotary kiln according to claim 3, further comprising a crown band provided on the outer wall of the kiln steel casing in a first portion of the mid-kiln region and a tail band provided on the outer wall of the kiln steel casing in a third portion of the mid-kiln region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120333706.5U CN214406088U (en) | 2021-02-05 | 2021-02-05 | Rotary kiln for hazardous waste incineration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120333706.5U CN214406088U (en) | 2021-02-05 | 2021-02-05 | Rotary kiln for hazardous waste incineration |
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| Publication Number | Publication Date |
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| CN214406088U true CN214406088U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120333706.5U Active CN214406088U (en) | 2021-02-05 | 2021-02-05 | Rotary kiln for hazardous waste incineration |
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| CN (1) | CN214406088U (en) |
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2021
- 2021-02-05 CN CN202120333706.5U patent/CN214406088U/en active Active
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