Lining structure of chemical combustion chamber

Abstract

The utility model provides a lining structure of a chemical combustion chamber, particularly relates to the technical field of smelting equipment, and aims to solve the problems that lining refractory bricks are seriously ablated due to the fact that the load of the combustion chamber is increased, and the combustion chamber is in a static state. The ablation of the upper half part of the combustion chamber is more serious than that of the lower half part of the combustion chamber, so that the maintenance period of the combustion chamber is shortened, the workload of workers is increased, and the production efficiency is reduced. The lining comprises a material inlet, a lining body and a product outlet which are sequentially connected from left to right, the lining body comprises an upper semi-circle structure and a lower semi-circle structure which are mutually spliced in the vertical direction, and the fire resistance of the upper semi-circle structure is higher than that of the lower semi-circle structure. Through targeted optimization, materials are matched according to the thermal load difference of the upper semicircle and the lower semicircle, the ablation rate of the refractory bricks is reduced, and the maintenance period is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and more specifically, to a chemical combustion chamber lining structure. Background Technology

[0002] Currently, in the production process of titanium dioxide, the combustion chamber, as a smelting device, is used in the sulfuric acid process for titanium dioxide production to supply the heat energy for the dehydration, desulfurization, and crystal transformation of metatitanic acid in the rotary kiln. To increase the yield of titanium dioxide, it is necessary to increase the heating supply to the combustion chamber. The current measures taken are to increase the gas supply and raise the combustion chamber temperature.

[0003] However, the increased load on the combustion chamber caused severe erosion of the refractory lining. Furthermore, because the combustion chamber is stationary, the erosion of the upper part of the chamber was more severe than that of the lower part, leading to a shorter maintenance cycle, increased workload for workers, and reduced production efficiency. While selecting refractory bricks with refractory properties exceeding the erosion level of the upper part of the combustion chamber could effectively solve the above problems, it would result in wasted resources and unnecessary additional costs. Utility Model Content

[0004] The purpose of this invention is to provide a chemical combustion chamber lining structure that, through targeted optimization, matches materials according to the difference in heat load between the upper and lower semicircles, thereby reducing the erosion rate of refractory bricks and extending the maintenance cycle.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A chemical combustion chamber lining structure includes a material inlet, a lining body, and a product outlet connected sequentially from left to right. The lining body includes an upper semicircular structure and a lower semicircular structure that are spliced ​​together in a vertical direction. The fire resistance of the upper semicircular structure is higher than that of the lower semicircular structure.

[0007] In some embodiments, the upper semicircular structure includes a first heat insulation layer, a first thermal insulation layer, an auxiliary fire-resistant layer, and a first fire-resistant layer laid sequentially from top to bottom.

[0008] In some embodiments, the lower semicircular structure includes a second heat insulation layer, a second thermal insulation layer, and a second fire-resistant layer laid sequentially from bottom to top.

[0009] In some embodiments, the thickness of the first insulation layer and the second insulation layer are the same; the sum of the thicknesses of the first thermal insulation layer and the auxiliary fire-resistant layer is equal to the thickness of the second thermal insulation layer; and the thickness of the first fire-resistant layer is the same as the thickness of the second fire-resistant layer.

[0010] In some embodiments, the first heat insulation layer and the second heat insulation layer are spliced ​​together; the first thermal insulation layer, the auxiliary fire-resistant layer and the second thermal insulation layer are spliced ​​together; the first fire-resistant layer and the second fire-resistant layer are spliced ​​together.

[0011] In some embodiments, the first heat insulation layer is made of ceramic fiber bricks bonded together; the first thermal insulation layer is made of lightweight refractory bricks of high alumina bauxite spliced ​​together; the auxiliary refractory layer is filled with phosphate refractory castable; and the first refractory layer is made of high alumina bricks spliced ​​together.

[0012] In some embodiments, the second heat insulation layer is made of asbestos board bonded together, the second thermal insulation layer is made of lightweight refractory bricks made of high-alumina bauxite, and the second refractory layer is made of high-alumina bricks.

[0013] In some embodiments, the upper semicircular structure and the lower semicircular structure are provided with a plurality of circumferential expansion joints spaced apart in the axial direction.

[0014] In some embodiments, both the material inlet and the product outlet are provided with a plurality of Y-shaped anchor pins.

[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0016] 1. The combustion chamber lining of this combustion chamber has been specifically optimized, and the materials are matched according to the difference in heat load between the upper and lower hemispheres, which reduces the erosion rate of the refractory bricks and extends the maintenance cycle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a chemical combustion chamber lining structure provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of cross section A;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of cross section B;

[0021] Icons: 1. Material inlet; 2. Product outlet; 3. Upper semicircular structure; 31. First insulation layer; 32. First thermal insulation layer; 33. Auxiliary refractory layer; 34. First refractory layer; 4. Lower semicircular structure; 41. Second insulation layer; 42. Second thermal insulation layer; 43. Second refractory layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figures 1-2As shown in the figure, the chemical combustion chamber lining structure provided in this embodiment includes a material inlet 1, a lining body, and a product outlet 2 connected sequentially from left to right. The lining body includes an upper semicircular structure 3 and a lower semicircular structure 4 that are spliced ​​together in the vertical direction. The fire resistance of the upper semicircular structure 3 is higher than that of the lower semicircular structure 4. The upper semicircular structure 3 includes a first heat insulation layer 31, a first thermal insulation layer 32, an auxiliary fire-resistant layer 33, and a first fire-resistant layer 34 laid sequentially from top to bottom. The lower semicircular structure 4 includes a second heat insulation layer 41, a second thermal insulation layer 42, and a second fire-resistant layer 43 laid sequentially from bottom to top.

[0028] Furthermore, the first heat insulation layer 31 and the second heat insulation layer 41 have the same thickness; the sum of the thicknesses of the first thermal insulation layer 32 and the auxiliary fire-resistant layer 33 is equal to the thickness of the second thermal insulation layer 42; and the thickness of the first fire-resistant layer 34 is the same as the thickness of the second fire-resistant layer 43.

[0029] Furthermore, the first heat insulation layer 31 and the second heat insulation layer 41 are spliced ​​together; the first thermal insulation layer 32, the auxiliary fire-resistant layer 33 and the second thermal insulation layer 42 are spliced ​​together; the first fire-resistant layer 34 and the second fire-resistant layer 43 are spliced ​​together.

[0030] Furthermore, the first heat insulation layer 31 is made of ceramic fiber bricks bonded together; the first thermal insulation layer 32 is made of lightweight refractory bricks of high alumina bauxite material spliced ​​together; the auxiliary refractory layer 33 is filled with phosphate refractory castable; and the first refractory layer 34 is made of high alumina bricks spliced ​​together.

[0031] Furthermore, the second heat insulation layer 41 is made of asbestos board bonded together; the second thermal insulation layer 42 is made of lightweight refractory bricks made of high-alumina bauxite; and the second refractory layer 43 is made of high-alumina bricks.

[0032] Furthermore, the upper semicircular structure 3 and the lower semicircular structure 4 are provided with multiple circumferential expansion joints at intervals in the axial direction to prevent thermal expansion from causing the lining to crack.

[0033] Furthermore, both the material inlet 1 and the product outlet 2 are equipped with multiple Y-shaped anchoring nails to improve the stability of the lining structure.

[0034] It is worth mentioning that the combustion chamber lining adopts an upper and lower partition design. The upper semicircular structure 3 is reinforced with a four-layer composite structure to enhance ablation resistance (ceramic fiber brick + lightweight brick + phosphate castable + high alumina brick), improving sealing and thermal shock resistance in high-temperature ablation areas. The phosphate castable sealing layer effectively prevents flame penetration and reduces the risk of accidents. The lower semicircular simplified insulation structure uses a three-layer design (asbestos board + lightweight brick + high alumina brick) to balance insulation and mechanical strength, reducing redundant material costs.

[0035] Through targeted optimization, the materials in this combustion chamber lining are matched according to the difference in heat load between the upper and lower hemispheres, which reduces the erosion rate of the refractory bricks and extends the maintenance cycle.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A chemical combustion chamber lining structure, comprising a material inlet (1), a lining body, and a product outlet (2) connected sequentially from left to right, characterized in that, The lining includes an upper semicircular structure (3) and a lower semicircular structure (4) that are spliced ​​together in the vertical direction. The fire resistance of the upper semicircular structure (3) is higher than that of the lower semicircular structure (4). The upper semicircular structure (3) includes a first heat insulation layer (31), a first thermal insulation layer (32), an auxiliary fire-resistant layer (33), and a first fire-resistant layer (34) laid from top to bottom. The lower semicircular structure (4) includes a second heat insulation layer (41), a second thermal insulation layer (42), and a second fire-resistant layer (43) laid from bottom to top.

2. The chemical combustion chamber lining structure according to claim 1, characterized in that, The first heat insulation layer (31) and the second heat insulation layer (41) have the same thickness; the sum of the thicknesses of the first heat insulation layer (32) and the auxiliary fire-resistant layer (33) is equal to the thickness of the second heat insulation layer (42); the thickness of the first fire-resistant layer (34) is the same as the thickness of the second fire-resistant layer (43).

3. The chemical combustion chamber lining structure according to claim 2, characterized in that, The first heat insulation layer (31) and the second heat insulation layer (41) are spliced ​​together; the first heat insulation layer (32), the auxiliary fire-resistant layer (33) and the second heat insulation layer (42) are spliced ​​together; the first fire-resistant layer (34) and the second fire-resistant layer (43) are spliced ​​together.

4. The chemical combustion chamber lining structure according to claim 1, characterized in that, The first heat insulation layer (31) is made of ceramic fiber bricks bonded together; the first heat insulation layer (32) is made of lightweight refractory bricks of high alumina bauxite material spliced ​​together; the auxiliary refractory layer (33) is made of phosphate refractory castable filling; the first refractory layer (34) is made of high alumina bricks spliced ​​together.

5. The chemical combustion chamber lining structure according to claim 1, characterized in that, The second heat insulation layer (41) is made of asbestos board; the second heat insulation layer (42) is made of lightweight refractory bricks made of high alumina bauxite; and the second refractory layer (43) is made of high alumina bricks.

6. The chemical combustion chamber lining structure according to claim 1, characterized in that, The upper semicircular structure (3) and the lower semicircular structure (4) are provided with multiple circumferential expansion joints spaced apart in the axial direction.

7. The chemical combustion chamber lining structure according to claim 1, characterized in that, Both the material inlet (1) and the product outlet (2) are equipped with multiple Y-shaped anchors.

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