A caustic recovery boiler casting launder

Abstract

This utility model discloses a cast chute for an alkali recovery boiler, comprising a chute body, a flange plate at the front opening edge of the chute body, a fixing plate at the back surface of the chute body located on the flange plate, and side plates at the top of both sides of the chute body. The chute body, flange plate, fixing plate, and side plates are cast as a single unit. An inner jacket is snapped into the top of the chute body, and a slot and a fixing slot are snapped into the interior of the chute body. This utility model eliminates the water-cooled jacketed structure and adopts a dry-firing structure. The cast components are resistant to high temperatures of 1300℃ and can withstand the corrosion and wear of 1000℃ high-temperature molten lava in alkali recovery boilers. It has no complex circulating cooling water system, a long service life (generally more than 6 months), and no leakage or cracking occurs during its service life, eliminating safety hazards. The chute replacement time coincides with the normal boiler maintenance time, making it convenient to use and solving the problems of safety hazards and high operating costs associated with existing water-cooled jacketed chutes.

Description

Technical Field

[0001] This utility model relates to the field of alkali recovery boiler technology, specifically to a casting chute for an alkali recovery boiler. Background Technology

[0002] Currently, the molten sodium carbonate, sodium sulfate, sodium sulfide, and other inorganic salts produced by the combustion of black liquor in alkali recovery boilers are mostly introduced into the dissolution tank via water-cooled jacketed welded chutes. The operating environment at these sites is relatively harsh. Furthermore, when the chutes malfunction, such as due to molten slurry wear or corrosion leaks, water inside the jacket can spray out and come into contact with the molten slurry, potentially causing explosions and splashes, which can easily lead to personal injury and equipment damage, posing a safety hazard. Existing water-cooled jacketed chutes require boiler demineralized water cooling, necessitating complex circulating cooling water systems and monitoring equipment. The investment in chute systems is substantial, and the service life of water-cooled chutes is unstable, generally around 3-6 months, resulting in high operating costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a casting chute for alkali recovery boilers, which solves the problems of safety hazards and high operating costs associated with existing water-cooled jacketed chutes.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A cast chute for alkali recovery boiler includes a chute body. A flange plate is provided on the front opening edge of the chute body. A fixing plate is provided on the surface of the chute body located on the back of the flange plate. Edge plates are provided on the top of both sides of the chute body. The chute body, flange plate, fixing plate, and edge plate are cast as a single unit. An inner sleeve is snapped into the top of the chute body. A slot and a fixing slot are snapped into the inside of the chute body. The inner sleeve, slot, and fixing slot are spliced ​​together.

[0006] Preferably, there are multiple slots that are spliced ​​together and have the same length as the fixing slot.

[0007] Preferably, the bottom edges of the inner sleeve and the card slot are respectively provided with recessed splicing grooves, and the top edges of the card slot and the fixing groove are respectively provided with protruding strips. The inner sleeve, the card slot and the fixing groove are spliced ​​together by the splicing grooves and the protruding strips.

[0008] Preferably, the inner sleeve, the slot, and the fixing groove are all integrally cast with the edge plate and the protrusion, respectively.

[0009] Preferably, the edges of the inner sleeve, the slot, and the fixing groove are respectively provided with fixing edges corresponding to the edge plate and the side plate, and fixing holes are provided on the fixing edges at positions corresponding to the edge plate and the side plate.

[0010] Preferably, a reinforcing corner plate is provided between the lower part of the chute plate and the outer wall of the chute body, and the reinforcing corner plate and the chute body are a cast integral structure.

[0011] Preferably, a reinforcing corner plate is provided at the position corresponding to each card slot and fixing slot below the edge plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model abolishes the water-cooled jacketed structure and adopts a dry-burning structure. The cast components are resistant to high temperatures of 1300℃ and can withstand corrosion and wear from 1000℃ high-temperature molten lava in alkali recovery boilers. It has no complicated circulating cooling water system, has a long service life, generally more than 6 months, and will not leak or crack during its service life, eliminating safety hazards. The replacement time of the chute is consistent with the normal maintenance time of the boiler, making it convenient to use. It solves the problems of safety hazards and high operating costs of existing water-cooled jacketed chutes. Attached Figure Description

[0014] Figure 1 This is a front view of the present utility model;

[0015] Figure 2 This is a rear view of the present invention;

[0016] Figure 3 This is a side view of the present invention;

[0017] Figure 4 This is a side sectional view of the present invention.

[0018] In the figure: 1. Chute body; 101. Edge plate; 102. Fixing plate; 103. Edge plate; 2. Inner sleeve; 3. Slot; 4. Fixing slot; 5. Splicing slot; 6. Protrusion; 7. Fixing edge; 8. Fixing hole; 9. Reinforcing corner plate. Detailed Implementation

[0019] 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.

[0020] like Figure 1-4As shown, this utility model provides a technical solution: a cast chute for alkali recovery boiler, including a chute body 1, a flange plate 101 is provided on the front opening edge of the chute body 1, a fixing plate 102 is provided on the surface of the chute body 1 located on the back of the flange plate 101, and side plates 103 are provided on the top of the two side edges of the chute body 1. The chute body 1, flange plate 101, fixing plate 102 and side plate 103 are cast as a single structure.

[0021] The top of the chute body 1 is fitted with an inner sleeve 2. The inside of the chute body 1 is fitted with a slot 3 and a fixing slot 4. The bottom edges of the inner sleeve 2 and the slot 3 are respectively provided with recessed splicing slots 5. The top edges of the slot 3 and the fixing slot 4 are respectively provided with protrusions 6. The inner sleeve 2, the slot 3 and the fixing slot 4 are all integrally cast with the edge plate 103 and the protrusions 6.

[0022] The slot 3 has multiple slots that are spliced ​​together and have the same length as the fixing slot 4. The inner sleeve 2, slot 3 and fixing slot 4 are spliced ​​together. The inner sleeve 2, slot 3 and fixing slot 4 are spliced ​​together by splicing slot 5 and protrusion 6. The edges of the inner sleeve 2, slot 3 and fixing slot 4 are respectively provided with fixing edges 7 corresponding to the edge plate 101 and the side plate 103. Fixing holes 8 are provided on the fixing edges 7 at positions corresponding to the edge plate 101 and the side plate 103.

[0023] A reinforcing angle plate 9 is provided between the lower part of the plate 103 and the outer wall of the chute body 1. The reinforcing angle plate 9 and the chute body 1 are integrally cast. A reinforcing angle plate 9 is provided at the position of each slot 3 and fixing slot 4 below the plate 103.

[0024] The chute body 1 is internally equipped with interlocking inner sleeves 2, slots 3, and fixing slots 4, which thickens the overall wall thickness of the chute. The splicing installation prevents leakage. Even when the cycle is reached, partial replacement can be performed after assessment of wear and tear, reducing costs. Installation and connection are made through fixing holes 8, which is very convenient. By adopting a dry-burning structure with cast chute body 1, inner sleeves 2, slots 3, and fixing slots 4, each component is an integral cast steel component containing chromium, nickel, and iron. The cast components can withstand high temperatures of 1300℃ and can withstand corrosion and wear from 1000℃ high-temperature molten lava in alkali recovery boilers. There is no complicated circulating cooling water system, resulting in a long service life, generally more than 6 months. During the service life, no leakage or cracking will occur, eliminating safety hazards. The replacement time of the chute is consistent with the normal maintenance time of the boiler, making it convenient to use.

[0025] 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.

[0026] 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 casting chute for an alkali recovery boiler, comprising a chute body (1), wherein a flange plate (101) is provided on the front opening edge of the chute body (1), a fixing plate (102) is provided on the surface of the chute body (1) located on the back side of the flange plate (101), and side plates (103) are provided on the top of the two side edges of the chute body (1), characterized in that: The chute body (1), edge plate (101), fixing plate (102) and side plate (103) are cast as a single structure. The top of the chute body (1) is fitted with an inner sleeve (2). The chute body (1) has a slot (3) and a fixing slot (4) fitted inside the trough. The inner sleeve (2), slot (3) and fixing slot (4) are spliced ​​together.

2. The casting chute for an alkali recovery boiler according to claim 1, characterized in that: The slots (3) are multiple and are spliced ​​together, and their length is equal to that of the fixing slots (4).

3. The casting chute for an alkali recovery boiler according to claim 2, characterized in that: The bottom edges of the inner sleeve (2) and the slot (3) are respectively provided with recessed splicing grooves (5), and the top edges of the slot (3) and the fixing groove (4) are respectively provided with protrusions (6). The inner sleeve (2), the slot (3) and the fixing groove (4) are spliced ​​together by the splicing grooves (5) and the protrusions (6).

4. The casting chute for an alkali recovery boiler according to claim 3, characterized in that: The inner sleeve (2), the slot (3) and the fixing slot (4) are all integrally cast with the side plate (103) and the convex strip (6), respectively.

5. The casting chute for an alkali recovery boiler according to claim 1, characterized in that: The inner sleeve (2), the slot (3) and the fixing slot (4) are respectively provided with fixing edges (7) corresponding to the edge plate (101) and the side plate (103), and fixing holes (8) are provided on the fixing edges (7) at positions corresponding to the edge plate (101) and the side plate (103).

6. The casting chute for an alkali recovery boiler according to claim 1, characterized in that: A reinforcing corner plate (9) is provided between the lower part of the chute plate (103) and the outer wall of the chute body (1). The reinforcing corner plate (9) and the chute body (1) are integrally cast.

7. The casting chute for an alkali recovery boiler according to claim 6, characterized in that: A reinforcing corner plate (9) is provided at the position corresponding to each slot (3) and fixing slot (4) below the edge plate (103).

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