Denitration catalyst roasting furnace with uniform heating function

Abstract

The utility model discloses a denitration catalyst roasting furnace with a uniform heating function, which comprises a kiln and a net chain conveyor penetrating through the kiln front and back, and a plurality of groups of V-shaped supports used for placing denitration catalysts are arranged on a chain belt of the net chain conveyor at equal intervals along the length direction. A plurality of combustors and induced draft fans are installed on the two sides of the inner wall of the kiln respectively, the combustors and the induced draft fans are arranged at equal intervals in the longitudinal direction and are arranged at intervals, the height of the combustors corresponds to the position, close to the lower portion, of the middle of a denitration catalyst, and the height of the induced draft fans corresponds to the height of the denitration catalyst. The combustors and the induced draft fans are arranged on the two sides of the kiln respectively, the denitration catalyst is transversely placed and conveyed after being supported by the V-shaped supports on the net chain conveyor, the combustors sequentially and repeatedly conduct roasting from the two ends of the denitration catalyst, high-temperature flue gas can smoothly penetrate through the denitration catalyst, and the denitration catalyst can be recycled. Therefore, the internal and external uniform heating roasting of the denitration catalyst is promoted, and the internal and external quality consistency of products is improved.

Description

Technical Field

[0001] This utility model relates to the field of roasting furnace technology, specifically a denitrification catalyst roasting furnace with uniform heating function. Background Technology

[0002] Denitrification catalysts generally refer to catalysts used in SCR (selective catalytic reduction) denitrification systems in power plants. In the SCR reaction, they are substances that promote the selective chemical reaction between the reducing agent and nitrogen oxides in the flue gas at a certain temperature, making them an important means of waste gas treatment. After extrusion drying during production, denitrification catalysts need to be calcined in a calcination furnace to improve component uniformity and stability, enhance catalytic activity, and improve temperature resistance.

[0003] During the calcination process, the components in the denitration catalyst are further mixed uniformly through high-temperature treatment to form a stable structure, ensuring stable performance under harsh reaction conditions. At the same time, it helps to disperse and activate the active components, forming more active sites and improving the denitration catalyst's adsorption and conversion capacity for nitrogen oxides. In addition, the crystal structure of the denitration catalyst is optimized, enabling it to withstand higher temperatures without significant performance degradation, thereby extending its service life.

[0004] In current common roasting furnaces, the denitrification catalyst is laid horizontally on a mesh conveyor and transported to the tail end. The roasting furnace uses a burner to roast the catalyst from the tail end, and the flue gas is drawn out to the front end by a fan. Because the denitrification catalyst has a porous structure, when the high-temperature flue gas is transported from back to front, it only comes into contact with the surface of the denitrification catalyst first. Then the heat is gradually conducted from the surface of the denitrification catalyst to the inside, resulting in uneven roasting inside, affecting the roasting effect, and thus affecting the use effect of the denitrification catalyst and the product quality. Therefore, our company has designed and proposed a new type of denitrification catalyst roasting furnace. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a denitrification catalyst roasting furnace with uniform heating function, which solves the problem of insufficient uniform roasting of the denitrification catalyst inside the current roasting furnace.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A denitrification catalyst roasting furnace with uniform heating function includes a kiln and a mesh conveyor that runs through the kiln from front to back. The mesh conveyor belt is provided with multiple sets of V-shaped supports for placing denitrification catalysts at equal intervals along its length. Multiple burners and induced draft fans are installed on both sides of the inner wall of the kiln. The burners and induced draft fans are provided at equal intervals along the longitudinal direction and are spaced apart. The height of the burners corresponds to the lower middle part of the denitrification catalyst, and the height of the induced draft fans corresponds to the height of the denitrification catalyst. The burners and induced draft fans are arranged opposite each other from left to right.

[0008] The frame of the mesh chain conveyor is U-shaped and offset from the positions of the burner and the induced draft fan. A cross frame is fixed to the frame of the mesh chain conveyor with the chain belt running through it laterally. A support frame is fixed to the cross frame. A support roller is installed on the support frame to support the bottom of the chain belt surface of the mesh chain conveyor.

[0009] The kiln has longitudinal flues connected to the kiln interior at the positions of the induced draft fan on both sides of its exterior. A drive motor connected to the induced draft fan via a connecting shaft is installed outside the flue. An air inlet pipe connected to the burner is fixed on both sides of the kiln exterior, and the air inlet pipe is located below the flue.

[0010] Preferably, each group of the V-shaped supports has at least two and is arranged laterally on the chain of the mesh conveyor. The V-shaped supports are movably hinged to the chain of the mesh conveyor via hinge seats.

[0011] Preferably, the opening of the V-shaped bracket is 90°, and the bottom of the V-shaped bracket is a plane that contacts the surface of the chain conveyor belt.

[0012] Preferably, the rear end of the flue is bent upwards.

[0013] Preferably, the number of induced draft fans and burners on both sides of the mesh conveyor is equal.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention features burners and induced draft fans on both sides of the kiln. The denitrification catalyst is supported by a V-shaped bracket on a mesh conveyor and transported laterally. The V-shaped bracket reduces the contact area between the denitrification catalyst and the conveyor belt, improving the contact effect between the bottom surface and the high-temperature flue gas. The burners sequentially and repeatedly roast the denitrification catalyst from both ends, allowing the high-temperature flue gas to pass smoothly through the interior of the catalyst. This promotes uniform heating and roasting of the catalyst both inside and out, optimizing the roasting effect, improving the performance of the denitrification catalyst, enhancing the consistency of product quality, extending service life, and solving the problem of uneven roasting of the denitrification catalyst in current roasting furnaces. Attached Figure Description

[0016] Figure 1 This is a front view of the present utility model;

[0017] Figure 2 This is a front view of the internal structure of the kiln of this utility model;

[0018] Figure 3 This is a right view of the present invention;

[0019] Figure 4 This is a right view of the internal structure of the kiln of this utility model;

[0020] Figure 5 This is a partial structural side view of the mesh conveyor of this utility model;

[0021] Figure 6 This is a side view of the V-shaped bracket of this utility model.

[0022] In the diagram: 1. Kiln; 2. Mesh conveyor; 3. Denitrification catalyst; 4. V-shaped support; 5. Burner; 6. Exhaust fan; 7. Horizontal frame; 8. Support frame; 9. Support roller; 10. Flue; 11. Drive motor; 12. Air inlet pipe; 13. Hinge seat. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-6 As shown, this utility model provides a technical solution: a denitrification catalyst roasting furnace with uniform heating function, including a kiln 1 and a mesh chain conveyor 2 that runs through the kiln 1 from front to back. Multiple sets of V-shaped supports 4 for placing denitrification catalyst 3 are equidistantly arranged on the chain belt of the mesh chain conveyor 2 along the length direction. Each set of V-shaped supports 4 has at least two members and is arranged laterally on the chain belt of the mesh chain conveyor 2. The V-shaped supports 4 are movably hinged to the chain belt of the mesh chain conveyor 2 through hinge seats 13. The opening of the V-shaped supports 4 is 90°, and the bottom of the V-shaped supports 4 is a plane that contacts the surface of the chain belt of the mesh chain conveyor 2.

[0025] Multiple burners 5 and induced draft fans 6 are installed on both sides of the inner wall of the kiln 1. The burners 5 and induced draft fans 6 are arranged equidistantly along the longitudinal direction and are spaced apart. The height of the burner 5 corresponds to the lower middle position of the denitrification catalyst 3, and the height of the induced draft fan 6 corresponds to the height of the denitrification catalyst 3. The burners 5 and induced draft fans 6 are arranged opposite each other. The number of induced draft fans 6 and burners 5 on both sides of the mesh conveyor 2 is equal.

[0026] The frame of the mesh conveyor 2 is U-shaped and offset from the burner 5 and the induced draft fan 6. A cross frame 7 is fixed to the frame of the mesh conveyor 2 with the chain belt running through it laterally. A support frame 8 is fixed to the cross frame 7. A support roller 9 is installed on the support frame 8 to support the bottom of the chain belt surface of the mesh conveyor 2.

[0027] On both sides of the kiln 1, corresponding to the position of the induced draft fan 6, there are flues 10 connected to the inside of the kiln 1 along the longitudinal direction. The rear end of the flue 10 is bent upward. A drive motor 11 is installed on the outside of the flue 10 and is connected to the induced draft fan 6 through a connecting shaft. On both sides of the kiln 1, there are air inlet pipes 12 connected to the burner 5. The air inlet pipes 12 are located below the flue 10.

[0028] Working principle:

[0029] The denitrification catalyst 3 is supported by a V-shaped bracket 4 on the mesh conveyor 2 and then transported laterally. The V-shaped bracket 4 can reduce the contact area between the denitrification catalyst 3 and the mesh conveyor 2 chain, and improve the contact effect between the bottom surface and the high-temperature flue gas. The burner 5 is used to roast the denitrification catalyst 3 sequentially and repeatedly from both ends. Since the high-temperature flame and flue gas have a natural upward tendency in the air, the center height of the burner 5 is designed to be slightly lower than the center height of the denitrification catalyst 3. At the same time, an induced draft fan is set opposite the burner 5 to guide the high-temperature flame and flue gas, so that the high-temperature flue gas moves laterally, not only contacting the surface of the roasted denitrification catalyst 3, but also smoothly passing through the interior of the denitrification catalyst 3, promoting uniform heating and roasting of the denitrification catalyst 3 inside and out, thereby improving the consistency of the product's internal and external quality.

[0030] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A denitrification catalyst roasting furnace with uniform heating function, comprising a kiln (1) and a mesh conveyor (2) running through the kiln (1) from front to back, characterized in that: The chain conveyor (2) has multiple sets of V-shaped brackets (4) for placing the denitrification catalyst (3) at equal intervals along the length direction. Multiple burners (5) and induced draft fans (6) are installed on both sides of the inner wall of the kiln (1). The burners (5) and induced draft fans (6) are arranged at equal intervals along the longitudinal direction and are spaced apart. The height of the burner (5) corresponds to the lower middle position of the denitrification catalyst (3), and the height of the induced draft fan (6) corresponds to the height of the denitrification catalyst (3). The burners (5) and induced draft fans (6) are arranged opposite each other on the left and right. The frame of the mesh conveyor (2) is U-shaped and offset from the burner (5) and the induced draft fan (6). A cross frame (7) is fixed to the frame of the mesh conveyor (2) with the chain belt running through it laterally. A support frame (8) is fixed to the cross frame (7). A support roller (9) supporting the bottom of the chain belt of the mesh conveyor (2) is installed on the support frame (8). The kiln (1) has flues (10) on both sides of the exterior corresponding to the induced draft fan (6) and connected to the interior of the kiln (1) along the longitudinal direction. A drive motor (11) is installed on the outside of the flue (10) and is connected to the induced draft fan (6) via a connecting shaft. An air inlet pipe (12) connected to the burner (5) is fixed on both sides of the exterior of the kiln (1). The air inlet pipe (12) is located below the flue (10).

2. The denitrification catalyst roasting furnace with uniform heating function according to claim 1, characterized in that: Each group of the V-shaped brackets (4) has at least two and is arranged laterally on the chain of the mesh conveyor (2). The V-shaped brackets (4) are movably hinged to the chain of the mesh conveyor (2) by the hinge seat (13).

3. The denitrification catalyst roasting furnace with uniform heating function according to claim 1, characterized in that: The opening of the V-shaped bracket (4) is 90°, and the bottom of the V-shaped bracket (4) is a plane that contacts the surface of the chain conveyor (2).

4. The denitrification catalyst roasting furnace with uniform heating function according to claim 1, characterized in that: The rear end of the flue (10) is bent upward.

5. A denitrification catalyst roasting furnace with uniform heating function according to claim 1, characterized in that: The number of induced draft fans (6) and burners (5) on both sides of the mesh conveyor (2) are equal.

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