CN215176936U - Porous brick for down-draft shaft kiln - Google Patents
Porous brick for down-draft shaft kiln Download PDFInfo
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- CN215176936U CN215176936U CN202120884708.3U CN202120884708U CN215176936U CN 215176936 U CN215176936 U CN 215176936U CN 202120884708 U CN202120884708 U CN 202120884708U CN 215176936 U CN215176936 U CN 215176936U
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- brick
- perforated
- kiln
- brick body
- shaft kiln
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Abstract
The utility model discloses a down-draft shaft kiln uses perforated brick, include: brick body and rectangular hole. The perforated brick for the shaft kiln can design a mould according to the requirement, and the size and the number of the rectangular holes can be adjusted according to the thermal system in the kiln; the porous brick is corundum or corundum-mullite, and has strong high-temperature resistance, high strength and good pressure resistance; rectangular holes are distributed in the perforated brick at equal intervals, so that heat transmission is realized, energy consumption is reduced, and unorganized emission of the kiln is reduced.
Description
Technical Field
The utility model belongs to the technical field of kiln equipment manufacturing and specifically relates to a down-draft shaft kiln is with perforated brick.
Background
The block material is generally calcined by adopting a reflective shaft kiln, and calcined products produced by the kiln generally have the defects of small yield, slow production rhythm, unorganized emission, uncontrollable emission, high energy consumption and the like, and are gradually eliminated by the industry.
For example, the general capacity of a reflective shaft kiln for producing light-burned magnesium oxide is 5000-10000 tons/year, the kiln adopts an intermittent operation mode, and the calcination needs to be stopped in the discharging process. The method is repeated, and the produced unorganized discharge can not be treated in a centralized way, so that the production efficiency is low. Because this type of kiln does not have material indirect heating equipment, so the higher "red material" of temperature appears easily in the ejection of compact process, leads to the energy consumption of this type of kiln generally higher, restricts the more extensive application of this type of kiln greatly. At present, new, energy-saving down-draft shaft kilns have emerged in the industry as a step-by-step replacement for the traditional reflection shaft kilns. The novel down-draft shaft kiln has the advantages of continuous production, material heat exchange and the like, and can realize energy conservation, consumption reduction and environmental protection.
Wherein, the perforated brick adopted by the novel kiln is a key refractory device for realizing the functions, and no related products and preparation technology are reported at present.
Disclosure of Invention
The utility model aims at providing a down-draft shaft kiln is with perforated brick solves prior art not enough, and low consumption, environmental protection realize thermal benign transmission, reduce energy resource consumption, reduce the unorganized emission of kiln.
In order to realize the purpose, the technical scheme of the utility model is that:
a perforated brick for a down-draft shaft kiln, comprising: the brick body is of an arch-shaped trapezoidal structure, the transverse section of the brick body is of an isosceles arc trapezoid, the longitudinal section of the brick body is of a rectangle, and 5-10 rectangular holes which are distributed at equal intervals are formed in the side wall of the brick body.
The inner arc length of the brick body is 300-400mm, the outer arc length is 400-500mm, the thickness of the brick body is 100-200mm, and the height is 350-450 mm.
The width of the rectangular hole and the diameter of the block have the following relation: rectangular hole width d = (1/3-1/2) phiBlock materialWherein phiBlock materialIs the diameter of the block material and d is the width of the rectangular hole;
the relation between the height of the rectangular holes and the height of the perforated bricks is as follows: the height h = (1/2-3/4) h of the rectangular holePerforated brickWherein h isPerforated brickIs the height of the perforated brick.
The brick body is integrally cast by corundum or corundum-mullite material.
Compared with the prior art, the beneficial effects of the utility model are that: 1) the porous brick designed by the utility model can be provided with relevant moulds according to the needs, and the size and the number of the rectangular holes can be adjusted according to the thermal system in the kiln; 2) the porous brick is corundum or corundum-mullite, and has strong high-temperature resistance, high strength and good pressure resistance; 3) rectangular holes are distributed in the perforated brick at equal intervals, so that heat transmission is realized, energy consumption is reduced, and unorganized emission of the kiln is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the distribution state in the kiln according to the embodiment of the present invention.
In the figure: 1-brick body, 2-rectangular hole and 3-kiln outer wall.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the embodiments of the present invention and the accompanying drawings, and obviously, 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.
Referring to fig. 1-2, which are schematic views of the porous brick structure for the down-draft shaft kiln designed by the present invention, the brick body 1 is an arch-shaped trapezoidal structure, the transverse section of the brick body is an isosceles arc trapezoid, the longitudinal section of the brick body is a rectangle, and 5-10 rectangular holes 2 are arranged on the side wall of the brick body 1 and are distributed equidistantly; according to the size of the kiln diameter and the unit mass, 8-12 perforated bricks and 50-100 rectangular holes 2 are arranged in the kiln in a circle. The length of the inner arc of the brick body 1 is 400mm plus 300 mm, the length of the outer arc is 500mm plus 400mm, the thickness of the brick body 1 is 200mm plus 100 mm plus 450 mm.
The size of the rectangular hole 2 is determined according to the size of the block-shaped materials: width d = (1/3 ~ 1/2) phi of rectangular hole 2Block materialWherein phiBlock materialIs the diameter of the block, d isThe width of the rectangular hole 2; height h = (1/2-3/4) h of rectangular hole 2Perforated brickWherein h isPerforated brickIs the height of the perforated brick, and h is the height of the rectangular hole 2. The brick body 1 is integrally cast by corundum or corundum-mullite material.
In the kiln with the kiln diameter of 1000mm in the embodiment, 10 perforated bricks are arranged in the periphery, namely 80 rectangular holes 2 are arranged in the periphery. The length of the inner arc of the brick body 1 is 314mm, the length of the outer arc is 439.6mm, the thickness of the brick body 1 is 150mm, and the height is 400 mm. The width d =13.3mm of the rectangular hole 2 and the height h =200mm of the rectangular hole 2. The brick body 1 is made of corundum and is prepared by adopting an integral pouring process.
The specific preparation process of the perforated brick comprises the following steps: pouring the corundum material into a mould, curing for 24h, demoulding, curing for 12h, drying at 100 ℃ for 24h, calcining the dried porous brick at 1600 ℃ for 3h, and cooling along with a furnace to obtain the porous brick.
Physical and chemical indexes of the porous brick are as follows: the bulk density is 3.2g/cm3(ii) a The normal temperature compressive strength is 110 MPa; the high-temperature rupture strength is 5.6 MPa; the refractoriness under load was 1650 ℃.
By adopting the porous brick kiln for the down-draft shaft kiln, the energy consumption is reduced by 19 percent, and the concentration of particulate matters in smoke is less than 30mg/m3The ultra-low emission standard is achieved, and the energy is saved and the environment is protected.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A perforated brick for a down-draft shaft kiln, comprising: the brick comprises a brick body (1) and rectangular holes (2), wherein the brick body (1) is of an arch-shaped trapezoidal structure, the transverse section of the brick body is of an isosceles arc trapezoid, the longitudinal section of the brick body is of a rectangle, and the side wall of the brick body (1) is provided with 5-10 rectangular holes (2) distributed at equal intervals.
2. The perforated brick for the down-draft shaft kiln as claimed in claim 1, wherein the length of the inner circular arc of the brick body (1) is 400mm, the length of the outer circular arc is 400mm, the thickness of the brick body (1) is 200mm, and the height is 350 mm, 450 mm.
3. Perforated brick for a downdraft shaft kiln according to claim 1, characterized in that the width of the rectangular holes (2) is related to the diameter of the block by: the width d = (1/3-1/2) phi of the rectangular hole (2)Block materialWherein phiBlock materialThe diameter of the block is shown, and d is the width of the rectangular hole (2);
the relation between the height of the rectangular holes (2) and the height of the perforated bricks is as follows: the height h = (1/2-3/4) h of the rectangular hole (2)Perforated brickWherein h isPerforated brickIs the height of the perforated brick.
4. The perforated brick for a down-draft shaft kiln according to claim 1, wherein the brick body (1) is integrally cast by using corundum or corundum-mullite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120884708.3U CN215176936U (en) | 2021-04-27 | 2021-04-27 | Porous brick for down-draft shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120884708.3U CN215176936U (en) | 2021-04-27 | 2021-04-27 | Porous brick for down-draft shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215176936U true CN215176936U (en) | 2021-12-14 |
Family
ID=79364076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120884708.3U Active CN215176936U (en) | 2021-04-27 | 2021-04-27 | Porous brick for down-draft shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215176936U (en) |
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2021
- 2021-04-27 CN CN202120884708.3U patent/CN215176936U/en active Active
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