Novel multi-purpose anti-skinning multiphase ceramic plate for cement kiln
By using cement kiln anti-scaling ceramic plates made of silicon nitride multiphase composite materials, the problem of crusting in the smoke chamber of the cement kiln is solved, anti-scaling and wear resistance in high temperature environments are achieved, and production stability and equipment life are improved.
Patent Information
- Application Number
- CN202422959470.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The cement kiln smoke chamber has severe crusting at the constriction point, causing blockage in the preheater, affecting production operations. The cleaning work is tedious, dangerous and costly.
A new type of multi-purpose cement kiln anti-scaling composite ceramic plate made of silicon nitride multi-phase composite material is used. It is formed at 1500℃ through a vacuum one-time firing process. It has a smooth surface and is not easy to adhere to materials. It is resistant to high temperature and acid and alkali, easy to install and has high structural strength.
It effectively prevents crusting, is resistant to high temperatures and wear, extends service life, ensures production stability, and reduces maintenance costs.
Smart Images
Figure CN223425718U_ABST
Abstract
Description
Technical Field
[0001] This utility model patent relates to the technical field of cement kilns, and in particular to a new multi-purpose anti-crusting composite ceramic plate for cement kilns. Background Art
[0002] At present, the shrinkage part of the smoke chamber of domestic cement kilns is castable with welded anchors. Due to the high operating temperature of this part, severe crusting occurs, causing blockage of the preheater. Blockage will cause changes in wind speed and even stop production. The kiln must be stopped for one to two months to deal with the crusting. Manual cleaning of the crust is tedious and has certain risks, and the cost of stopping the kiln to deal with the crusting is expensive.
[0003] The constrictions and smoke chambers of cement production systems often form crusting and even blockages, seriously impacting cement production operations. This crusting is caused by the R2O and SO3 in the precalciner system exchanging heat with the raw meal in gaseous form at high temperatures, along with the kiln exhaust. Volatiles condense on the raw meal surface and adhere to the smoke chamber, the inner walls of the constriction, the cones of the lowest two preheaters, and the inner walls of the discharge pipe, gradually forming a crust. Excessive crusting inevitably affects system ventilation and kiln system operation. In severe cases, the crusting can break off and block the cones and discharge pipes, affecting the normal operation of the rotary kiln, causing economic losses and safety hazards to the company. The higher the smoke chamber temperature and the higher the sulfur and alkali content in the raw materials, the more severe the crusting. This crusting reduces ventilation in the kiln, leading to afterburning of the pulverized coal and exacerbating crusting, thus creating a vicious cycle. Utility Model Content
[0004] In order to overcome the defects of the prior art, the present invention provides a new multi-purpose cement kiln anti-crusting composite ceramic plate, the technical solution of which is as follows:
[0005] A new multi-purpose anti-scaling composite ceramic plate for cement kilns includes a main body; the main body is a cube, the front of the cube is smooth, a groove is provided in the middle of the back of the cube, the bottom of the groove is set as a plane, the groove is connected to the two side surfaces of the cube, and a left protrusion and a right protrusion are respectively provided on both sides of the back of the cube, the left protrusion is set as a left small cube, and the right protrusion is set as a right small cube, the middle of the left small cube is provided with a through left hole in a direction parallel to the length direction of the back of the cube, and the middle of the right small cube is provided with a through right hole in a direction parallel to the length direction of the back of the cube, and the left hole and the right hole are located on the same axis; the new composite ceramic plate is made of silicon nitride multiphase composite material.
[0006] Furthermore, the left end face of the cube is provided with a left notch, which is a cut on the front of the cube, and the right end face of the cube is provided with a right notch, which is a cut on the back of the cube. The left end face with the left notch and the right end face with the right notch can be plugged into each other during the installation of adjacent ceramic plates.
[0007] Furthermore, the left notch and the right notch are both right-angled notches.
[0008] Furthermore, the angle between the side surface and the bottom surface of the groove is an acute angle.
[0009] Furthermore, a left reinforcing strip with a trapezoidal cross section is added to the left side of the top of the groove, and a right reinforcing strip with a trapezoidal cross section is added to the right side of the top of the groove.
[0010] Furthermore, a side of the left reinforcing strip close to the groove is smoothly connected to an adjacent side surface of the groove to form a whole.
[0011] Furthermore, a side of the right reinforcing strip close to the groove is smoothly connected to an adjacent side surface of the groove to form a whole.
[0012] Furthermore, the left protrusion and the right protrusion have the same size, and the bottom widths of both are smaller than the back width of the body.
[0013] Furthermore, the bottoms on both sides of the left protrusion are provided with arc transitions toward the back side of the main body in the length direction.
[0014] Furthermore, the bottoms on both sides of the right protrusion are provided with arc transitions toward the back side of the main body in the length direction.
[0015] Compared with the prior art, the present invention has the following beneficial technical effects:
[0016] 1. Excellent anti-scaling effect. Because the kiln tail smoke chamber is located in a high-temperature area and processes a large amount of powdered materials, some components of these materials (such as alkali, chlorine, and sulfur compounds) tend to adhere to the smoke chamber walls at high temperatures, gradually forming a crust. Severe crusting can affect ventilation, leading to poor ventilation in the system and affecting the entire cement production process. The new multiphase ceramic plate is formed into a blank through a press molding process and then fired in a vacuum single-shot process. It reacts at a temperature of 1500°C to form a multiphase silicon nitride composite material. This composite material has unique physical properties and a smooth surface, which prevents materials from adhering to it and reacting with it to form crystals, thus achieving excellent anti-scaling effect.
[0017] 2. High temperature resistant, acid and alkali resistant, and widely used. The density of the new composite ceramic is 2.78g / cm 3 , exceptionally resistant to high temperatures and rapid heating and cooling. The new composite ceramic plate withstands temperatures up to 1560°C. In destructive testing, it remained intact after being removed from a 1200°C furnace and placed in a water-cooled chamber. The test cycle was repeated over 30 times with no change. Furthermore, it can operate at high temperatures in complex environments with alternating acid and alkaline conditions. Therefore, the new composite ceramic plate is ideally suited for applications in the cement industry, such as smoke chambers, necking, preheater cones, and feed pipes, where high temperatures and frequent pH fluctuations exist.
[0018] 3. It can be cast as a whole, with high structural strength, easy installation, and long service life. During installation, steel bars can be connected in series through small holes in the new composite ceramic panels, and Y-shaped nails connect the wall and the new composite ceramic panels. Therefore, it can be cast as a whole, which enhances the fixing effect and high structural strength, making the new composite ceramic panels less likely to fall off and extending their service life.
[0019] 4. Extremely wear-resistant, prevents leakage, and ensures production. The airflow in the smoke chamber is fast and contains a large amount of solid particles. These particles will continuously wash the inner wall of the smoke chamber, causing wear of the smoke chamber wall over a long period of time. Severe wear may cause holes in the smoke chamber wall, causing smoke leakage and affecting normal production. The wear loss of the new composite ceramic plate is 0.03g / cm 2 , wear resistance is cast stone (0.09g / cm 2 ) can better protect important parts such as the smoke chamber and the shrinkage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;
[0021] Figure 2 This is a side view of the structure of the utility model;
[0022] Figure 3 This is a schematic diagram of the top view of the structure of the utility model;
[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the right raised position of the utility model;
[0024] Figure 5 This is a schematic diagram of the installation of the utility model in the smoke chamber of a cement kiln;
[0025] In the figure: 1-main body, 2-right protrusion, 3-arc transition, 4-back, 5-front, 6-right notch, 7-right small hole, 8-right reinforcement bar, 9-left reinforcement bar, 10-left small hole, 11-left notch, 12-left protrusion, 13-groove, 14-new composite ceramic plate, 15-casting material, 16-rebar, 17-Y-type nail, 18-cement kiln smoke chamber outer cylinder. DETAILED DESCRIPTION
[0026] The present invention is described in detail below with reference to the embodiments and accompanying drawings. Example 1
[0027] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5The utility model provides a new type of multipurpose cement kiln anti -skinning complex ceramic plate, including the body 1, the body 1 is the square, the square front is smooth, the back of square 1 middle part is equipped with the recess 13, the bottom surface of recess 13 is equipped as the plane, recess 13 is penetrated with two sides of square, the back of square two sides are equipped with left boss 12 and right boss 2 respectively, left boss 12 is equipped as left small square, right boss 2 is equipped as right small square, the middle part of left small square is equipped with the left small hole 10 in the parallel direction of the length of the back of square, the middle part of right small square is equipped with the right small hole 7 in the parallel direction of the length of the back of square, left small hole 10 and right small hole 7 are located on the same axis, the new type of complex ceramic plate is made of silicon nitride multiphase composite material. Example 2
[0028] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A new type of multipurpose cement kiln anti -skinning complex ceramic plate, on the basis of the technical scheme described in example 1, the left end surface of the square is provided with a left opening 11, the left opening 11 is a square front cutout, the right end surface of the square is provided with a right opening 6, the right opening 6 is a square back cutout, the left end surface provided with the left opening 11 and the right end surface provided with the right opening 6 can be inserted into each other in the installation of adjacent ceramic plates. The insertion can make the installation of the ceramic plate more reliable. Example 3
[0029] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A new type of multipurpose cement kiln anti -skinning complex ceramic plate, on the basis of the technical scheme described in example 2, the left opening 11 and the right opening 6 are both right angle openings, to facilitate insertion, and also facilitate production. Example 4
[0030] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A new type of multipurpose cement kiln anti -skinning complex ceramic plate, on the basis of the technical scheme described in example 1, the angle between the side surface and the bottom surface of the recess 13 is an acute angle. Such design is considered that in the pouring process, the acute angle can make the pouring material fill into the inside of the angle, enhance the firmness of the pouring system. Example 5
[0031] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A new type of multi-purpose anti-crusting composite ceramic plate for cement kilns, based on the technical solution described in Example 1, has a left reinforcing bar 9 with a trapezoidal cross-section added to the left side of the top of the groove 13, and a right reinforcing bar 8 with a trapezoidal cross-section added to the right side of the top of the groove 13; the side of the left reinforcing bar 9 close to the groove 13 is smoothly connected to the adjacent side of the groove 13 to form a whole; the side of the right reinforcing bar 8 close to the groove 13 is smoothly connected to the adjacent side of the groove 13 to form a whole. The addition of the reinforcing bar facilitates the use of Y-shaped nails during installation, and the smooth connection is convenient for both casting and manufacturing. Example 6
[0032] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A new multi-purpose cement kiln anti-crusting composite ceramic plate, based on the technical solution described in Example 1, the left protrusion 12 and the right protrusion 2 have the same size, and the bottom width of both is smaller than the back width of the body 1, which is convenient for production and saves materials. Example 7
[0033] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A new multi-purpose composite ceramic plate for cement kiln anti-scaling, based on the technical solution described in Example 1, features arc transitions 3 on both sides of the bottom of the left protrusion 12, extending along the length of the back of the main body 1; and arc transitions 3 on both sides of the bottom of the right protrusion 2, extending along the length of the back of the main body 1. These arc transitions avoid stress concentration at corners and prevent cracking. During processing, these arc transitions smooth the machining path, reducing difficulty and cost, and improving machining quality and efficiency.
[0034] The installation principle of this utility model is briefly described as follows:
[0035] Taking the application in a cement kiln smoke chamber as an example, after leaving a casting space inside the cement kiln smoke chamber outer tube 18, the new composite ceramic panels 14 are erected with the front 5 facing inward and the back 4 facing outward. Each new composite ceramic panel 14 is neatly arranged upward in sequence. Rebar 16 is passed through the left small hole 10 on the left protrusion 12 and the right small hole 7 on the right protrusion 2 of each new composite ceramic panel 14, thus connecting the new composite ceramic panels 14 in series. At the same time, the bottom of the Y-shaped nail 17 is fixed to the cement kiln smoke chamber outer tube 18. As for the two vertices of the bifurcated claw, one supports the lower part of the left protrusion 12 and the lower part of the left reinforcement bar 9, and the other supports the right protrusion 2 and the lower part of the right reinforcement bar 8. In this way, each new composite ceramic panel 14 is supported by two Y-shaped nails 17. After the fixation is completed, the casting material is poured between the cement kiln smoke chamber outer cylinder 18 and the new composite ceramic plate 14. After the casting material is poured, the cement kiln smoke chamber outer cylinder 18, the new composite ceramic plate 14, the Y-shaped nails 17, the steel bars 16 and the casting material become a whole, and the fixing effect is greatly enhanced.
Claims
1. A new multi-purpose cement kiln anti-crusting composite ceramic plate, characterized in that: The invention comprises a main body; the main body is a cube, the front of the cube is smooth, a groove is provided in the middle of the back of the cube, the bottom of the groove is set as a plane, the groove is connected with the two side surfaces of the cube, a left protrusion and a right protrusion are respectively provided on both sides of the back of the cube, the left protrusion is set as a left small cube, the right protrusion is set as a right small cube, a left small hole is provided in the middle of the left small cube in a direction parallel to the length direction of the back of the cube, and a right small hole is provided in the middle of the right small cube in a direction parallel to the length direction of the back of the cube, and the left small hole and the right small hole are located on the same axis; the novel multiphase ceramic plate is made of silicon nitride multiphase composite material.
2. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 1, characterized in that: The left end face of the cube is provided with a left notch, which is a cut on the front side of the cube; the right end face of the cube is provided with a right notch, which is a cut on the back side of the cube; the left end face with the left notch and the right end face with the right notch can be plugged into each other during the installation of adjacent ceramic plates.
3. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 2, characterized in that: The left notch and the right notch are both right-angled notches.
4. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 1, characterized in that: The angle between the side surface and the bottom surface of the groove is an acute angle.
5. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 1, characterized in that: A left reinforcing strip with a trapezoidal cross section is added to the left side of the top of the groove, and a right reinforcing strip with a trapezoidal cross section is added to the right side of the top of the groove.
6. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 5, characterized in that: A side of the left reinforcing strip close to the groove is smoothly connected to an adjacent side surface of the groove to form a whole.
7. The multi-purpose cement kiln anti-scaling novel composite ceramic plate according to claim 5, characterized in that: A side of the right reinforcing strip close to the groove is smoothly connected to an adjacent side surface of the groove to form a whole.
8. The multi-purpose cement kiln anti-scaling new composite ceramic plate according to claim 1, characterized in that: The left protrusion and the right protrusion have the same size, and the bottom widths of both are smaller than the back width of the body.
9. The multi-purpose cement kiln anti-scaling novel composite ceramic plate according to claim 1, characterized in that: The bottoms of both sides of the left protrusion are provided with arc transitions in the length direction of the back side of the main body.
10. The multi-purpose cement kiln anti-scaling novel composite ceramic plate according to claim 1, characterized in that: The bottoms of both sides of the right protrusion are provided with arc transitions in the length direction of the back side of the main body.