Durable sulfur burning furnace

Abstract

This utility model belongs to the field of industrial furnace technology, specifically relating to a durable sulfur incineration furnace. It includes a cylindrical straight-section furnace body and end-capped furnace bodies connected to both ends of the straight-section furnace body. The end-capped furnace bodies are convex spherical in shape. The inner wall of the straight-section furnace body is lined with a first acid-resistant layer and a first heat-insulating layer arranged sequentially from the inside to the outside. The inner wall of the end-capped furnace body is lined with a refractory layer and a second heat-insulating layer. The key feature is that the refractory layer seals both ends of the first acid-resistant layer and the first heat-insulating layer, forming a cylindrical furnace cavity with the refractory layer and the first acid-resistant layer. A cavity is formed between the refractory layer and the second heat-insulating layer, and this cavity is filled with the second acid-resistant layer. Through the shape of the furnace body and the structure of the lining, this furnace not only enhances the pressure-bearing capacity of the end-capped furnace body but also enhances its fire resistance, corrosion resistance, and heat insulation capabilities. This extends the service life of the sulfur incineration furnace and reduces heat loss, achieving energy-saving effects.

Description

Technical Field

[0001] This utility model belongs to the field of industrial furnace technology, specifically relating to a durable sulfur incineration furnace. Background Technology

[0002] The sulfur incinerator is the main equipment used in the taurine production process. It is used to burn pure oxygen and liquid sulfur to produce sulfur dioxide. The general operating temperature inside the furnace is around 600 degrees Celsius, and the extreme temperature can reach as high as 1100 degrees Celsius. The internal operating environment is extremely complex, which makes the lining easy to be damaged and even endangers the normal operation of the sulfur incinerator.

[0003] Utility model patent CN209926866U discloses a furnace head lining structure for a sulfur recovery device, mainly comprising a furnace mouth section lining structure, a straight cylindrical section lining structure, and a transition section lining structure connecting the furnace mouth section and the straight cylindrical section. The furnace mouth section lining structure, from the inside out, consists of furnace mouth section refractory bricks, furnace mouth section insulating bricks, and a furnace mouth section castable layer. The straight cylindrical section lining structure, from the inside out, consists of straight cylindrical section refractory bricks, straight cylindrical section insulating bricks, and a straight cylindrical section castable layer. The transition section lining structure is mainly composed of multiple irregularly shaped refractory bricks assembled together. While this furnace can extend the service life of the lining to some extent, its application in sulfur combustion furnaces still requires improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a durable sulfur incinerator that can extend its service life.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A durable sulfur incinerator is designed, including a cylindrical straight section furnace body and a head furnace body connected to both ends of the straight section furnace body. The head furnace body is in the shape of an outwardly convex spherical head. The inner wall of the straight section furnace body is lined with a first acid-resistant layer and a first heat insulation layer arranged sequentially from the inside to the outside. The inner wall of the head furnace body is lined with a refractory layer and a second heat insulation layer. The refractory layer is characterized in that: the refractory layer seals both ends of the first acid-resistant layer and the first heat insulation layer, the refractory layer and the first acid-resistant layer form a cylindrical furnace cavity, and a cavity is formed between the refractory layer and the second heat insulation layer. The cavity is filled with the second acid-resistant layer.

[0006] The furnace body is equipped with an air inlet pipe. The outer end of the air inlet pipe is provided with an interface flange located on the outside of the furnace body, and the inner end is provided beyond the inner wall of the refractory layer. The inner end of the air inlet pipe is provided with a lining retaining ring.

[0007] Preferably, the outer wall of the air intake pipe is wrapped with fire-resistant fiber paper.

[0008] Preferably, the air intake pipe is inclined downward from the outside to the inside.

[0009] Preferably, the first acid-resistant layer and the second acid-resistant layer are acid-resistant castable layers, and the thickness of the first acid-resistant layer is 100 mm.

[0010] Preferably, the refractory layer is constructed of mullite bricks, and the gaps between two adjacent mullite bricks are filled with refractory mortar.

[0011] Preferably, the first and second insulation layers are lightweight refractory castable layers with a thickness of 250 mm.

[0012] Preferably, the furnace head body is also provided with an exhaust pipe, the outer end of which is connected to the atmosphere outside the furnace head body and the inner end of which is connected to the furnace cavity. An exhaust valve is provided on the exhaust pipe and the exhaust valve is located on the outside of the furnace head body.

[0013] Preferably, the furnace body at one end is provided with 4 to 6 exhaust pipes, which are evenly distributed.

[0014] Preferably, the straight section furnace body is provided with a first anchoring component, the inner end of the first anchoring component being located in the first acid-resistant layer; the end cap furnace body is provided with a second anchoring component, the inner end of the second anchoring component being located in the second acid-resistant layer.

[0015] Preferably, both the first anchoring component and the second anchoring component include Y-shaped anchors and linear anchors, with the Y-shaped anchors and linear anchors distributed in an alternating pattern.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model, through the shape of the furnace body and the structure of the lining, can not only enhance the pressure-bearing capacity of the furnace head, but also enhance the furnace body's fire resistance, corrosion resistance and heat insulation capabilities, thereby extending the service life of the sulfur incinerator and reducing heat loss, achieving the effect of energy saving.

[0018] 2. Because the furnace body is equipped with an air inlet pipe, the outer end of the air inlet pipe is provided with an interface flange located on the outside of the furnace body, and the inner end is set beyond the inner wall of the refractory layer. The inner end of the air inlet pipe is provided with a lining retaining ring, so that the air inlet pipe has an extension section beyond the refractory layer, avoiding the formation of an oxygen-rich zone on the refractory layer, which would lead to excessively high local temperatures.

[0019] 3. Because the inner end of the air inlet pipe is equipped with a lining baffle ring, it can prevent the oxygen sprayed out of the air inlet pipe from spraying onto the refractory layer, thus adding a protective barrier to the refractory layer.

[0020] 4. Because the outer wall of the intake pipe is wrapped with fire-resistant fiber paper, it can provide sufficient space for thermal expansion and contraction, thus preventing the intake pipe from being damaged by hard compression.

[0021] 5. Because the intake pipe is inclined downwards from the outside to the inside, the oxygen supplied in the intake pipe is in a diving shape, which allows the sulfur to be burned as completely as possible during the combustion and rising process, so as to obtain high-quality sulfur dioxide.

[0022] 6. Since the furnace head is also equipped with an exhaust pipe, the outer end of the exhaust pipe is connected to the atmosphere outside the furnace head, and the inner end is connected to the furnace cavity. An exhaust valve is installed on the exhaust pipe. The exhaust valve is located on the outside of the furnace head. The exhaust valve can be opened to facilitate the discharge of moisture during furnace drying. Closing the exhaust valve will not affect the normal operation of the sulfur combustion furnace.

[0023] 7. The first and second anchoring components are used to achieve a stable connection between each section of the furnace body and the lining, preventing the lining from falling off and thus ensuring the normal operation of the sulfur combustion furnace.

[0024] 8. This utility model has an ingenious design. Through the structural design of the furnace body and lining, as well as the improvement of the air inlet pipe, it greatly enhances the durability of the sulfur combustion furnace and extends its service life. It is worth promoting and using in the industry. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention.

[0026] The markings in the diagram are as follows: 1. Straight section furnace body; 2. End cap furnace body; 3. First insulation layer; 4. First acid-resistant layer; 5. Refractory layer; 51. Mullite brick; 52. Refractory mortar; 6. Second acid-resistant layer; 7. Furnace cavity; 8. Air inlet pipe; 9. Interface flange; 10. Refractory fiber paper; 11. Lining retaining ring; 12. Exhaust pipe; 13. Exhaust valve; 14. Y-type anchor; 15. Linear anchor. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] When this utility model is in operation, the side closer to the center of the furnace cavity 7 is defined as the inner side, and the other side farther away from the center of the furnace cavity 7 is defined as the outer side.

[0029] like Figure 1As shown, this utility model designs the straight section furnace body 1 as a cylindrical shape, with end-capped furnace bodies 2 connected to both ends of the straight section furnace body 1. The end-capped furnace bodies 2 are convex spherical in shape. The inner wall of the straight section furnace body 1 is provided with a first acid-resistant layer 4 and a first heat insulation layer 3 arranged sequentially from the inside to the outside. The thickness of the first acid-resistant layer 4 is 100mm. The inner wall of the end-capped furnace body 2 is provided with a refractory layer 5 and a second heat insulation layer. The first heat insulation layer 3 and the second heat insulation layer are lightweight refractory castable layers with a thickness of 250mm. The refractory layer 5 seals both ends of the first acid-resistant layer 4 and the first heat insulation layer 3. The refractory layer 5 is constructed of mullite bricks 51, and the gaps between two adjacent mullite bricks 51 are filled with refractory mortar 52. The refractory layer 5 and the first acid-resistant layer 4 form a cylindrical furnace cavity 7. A cavity is formed between the refractory layer 5 and the second insulation layer, and the cavity is filled with a second acid-resistant layer 6. The first acid-resistant layer 4 and the second acid-resistant layer 6 are acid-resistant castable layers. An air inlet pipe 8 is also provided on the furnace head 2. The air inlet pipe 8 slopes downwards from the outside to the inside, and its outer wall is wrapped with refractory fiber paper 10. The outer end of the air inlet pipe 8 has an interface flange 9 located on the outside of the furnace head 2, and its inner end extends beyond the inner wall of the refractory layer 5, giving the air inlet pipe 8 an extension beyond the refractory layer 5. This prevents the formation of an oxygen-rich zone on the refractory layer 5, thus avoiding excessively high local temperatures. The inner end of the air inlet pipe 8 is provided with a lining baffle ring 11, which prevents oxygen ejected from the air inlet pipe 8 from spraying onto the refractory layer 5, adding a protective barrier to the refractory layer 5.

[0030] To facilitate the removal of moisture from the furnace during the drying process, this invention also includes exhaust pipes 12 on the furnace head 2. Four to six exhaust pipes 12 are evenly distributed on one end of the furnace head 2. The outer end of each exhaust pipe 12 connects to the atmosphere outside the furnace head 2, and the inner end connects to the furnace cavity 7. An exhaust valve 13 is installed on each exhaust pipe 12, located on the outside of the furnace head 2. The exhaust valve 13 can be opened during furnace drying to facilitate the removal of moisture, and can also be closed to avoid affecting the normal operation of the sulfur combustion furnace.

[0031] To prevent the lining from falling off, this utility model also provides a first anchoring component on the straight section furnace body 1, with the inner end of the first anchoring component located in the first acid-resistant layer 4; a second anchoring component is provided on the end cap furnace body 2, with the inner end of the second anchoring component located in the second acid-resistant layer 6. Both the first anchoring component and the second anchoring component include Y-shaped anchoring nails 14 and linear anchoring nails 15, with the Y-shaped anchoring nails 14 and the linear anchoring nails 15 distributed in an alternating pattern.

[0032] The acid-resistant castable in the acid-resistant castable layer, the lightweight refractory castable in the lightweight refractory castable layer, the mullite brick 51, the refractory mortar 52, and the refractory fiber paper 10 mentioned above are all mature existing technologies, all purchased externally from Yixing Kaida Refractory Materials Co., Ltd.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model are not permitted.

Claims

1. A durable sulfur incinerator, comprising a cylindrical straight section furnace body and end-cap furnace bodies connected to both ends of the straight section furnace body, the end-cap furnace bodies being convex spherical in shape, the inner wall of the straight section furnace body being lined with a first acid-resistant layer and a first heat-insulating layer arranged sequentially from the inside to the outside, and the inner wall of the end-cap furnace bodies being lined with a refractory layer and a second heat-insulating layer, characterized in that: The refractory layer is sealed at both ends of the first acid-resistant layer and the first heat insulation layer. The refractory layer and the first acid-resistant layer form a cylindrical furnace cavity. A cavity is provided between the refractory layer and the second heat insulation layer, and the cavity is filled with the second acid-resistant layer. The furnace body is equipped with an air inlet pipe. The outer end of the air inlet pipe is provided with an interface flange located on the outside of the furnace body, and the inner end is provided beyond the inner wall of the refractory layer. The inner end of the air inlet pipe is provided with a lining retaining ring.

2. The durable sulfur incinerator according to claim 1, characterized in that: The outer wall of the air intake pipe is wrapped with fire-resistant fiber paper.

3. The durable sulfur incinerator according to claim 2, characterized in that: The air intake pipe slopes downwards from the outside to the inside.

4. The durable sulfur incinerator according to claim 3, characterized in that: The first acid-resistant layer and the second acid-resistant layer are acid-resistant castable layers, and the thickness of the first acid-resistant layer is 100mm.

5. The durable sulfur incinerator according to claim 4, characterized in that: The refractory layer is constructed of mullite bricks, and the gaps between two adjacent mullite bricks are filled with refractory mortar.

6. The durable sulfur incinerator according to claim 5, characterized in that: The first and second insulation layers are lightweight refractory castable layers with a thickness of 250 mm.

7. The durable sulfur incinerator according to any one of claims 1 to 6, characterized in that: The furnace head is also equipped with an exhaust pipe. The outer end of the exhaust pipe is connected to the atmosphere outside the furnace head, and the inner end is connected to the furnace cavity. An exhaust valve is provided on the exhaust pipe, and the exhaust valve is located on the outside of the furnace head.

8. The durable sulfur incinerator according to claim 7, characterized in that: The furnace body at one end has 4 to 6 exhaust pipes, which are evenly distributed.

9. The durable sulfur incinerator according to any one of claims 1 to 6, characterized in that: The straight section furnace body is provided with a first anchoring component, the inner end of which is located in the first acid-resistant layer; the end cap furnace body is provided with a second anchoring component, the inner end of which is located in the second acid-resistant layer.

10. The durable sulfur incinerator according to claim 9, characterized in that: Both the first and second anchoring components include Y-shaped anchors and linear anchors, with the Y-shaped anchors and linear anchors distributed in an alternating pattern.

Images