A new type of vertical acid waste heat boiler with full membrane wall and water cooling

Abstract

The utility model discloses a novel full membrane type wall water -cooled vertical acid waste heat boiler, specifically related to vertical acid waste heat boiler technical field, including the smoke inlet, front wall membrane type water cooled wall, middle membrane type wall, upper drum, first membrane type wall upper header, second membrane type wall upper header, membrane type wall lower header, rear membrane type wall left membrane type wall, right membrane type wall and waste heat boiler main part. The utility model discloses in the smoke gas from entering first flue, and first flue is composed by front wall membrane type water cooled wall, middle membrane type wall and membrane type wall front end, and the smoke gas turns ninety degrees and is passed through the second flue that is composed of middle membrane type wall, rear membrane type wall, membrane type wall rear end, then passes through two convection tube bundles, and then the smoke gas turns ninety degrees to the smoke gas export, constitutes a complete flow channel, simple structure, good sealing performance, small air leakage coefficient, good boiler heat preservation effect, small heat loss, high boiler thermal efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vertical acid waste heat boiler technology, and more specifically, to a novel fully membrane-wall water-cooled vertical acid waste heat boiler. Background Technology

[0002] Vertical acid waste heat boilers are heat recovery equipment specifically designed for acidic waste heat high-temperature flue gas media. They are mainly used in industrial fields (such as chemical, metallurgical, and coking industries) to generate steam or hot water by recovering waste heat from acidic flue gas, while meeting environmental protection and energy-saving requirements.

[0003] Existing vertical waste heat boilers use acidic waste heat high-temperature flue gas as the heat source, resulting in low thermal efficiency and insufficient sealing performance. They employ bare tubes or simple finned tubes, which have limited contact area with the acidic flue gas, leading to weak radiative and convective heat transfer capabilities. The tube bundles are loosely arranged and do not fully contact the heated surfaces before being discharged. The non-membrane wall structure of the flue is composed of split tube bundles and fire-resistant walls, and gaps are easily formed at the joints due to thermal expansion and contraction or vibration, which can draw in cold air, dilute the flue gas temperature, and increase exhaust heat loss. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a novel fully membrane-type wall-cooled vertical acid waste heat boiler, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel vertical acid waste heat boiler with a fully membrane-walled water-cooled structure, comprising a flue gas inlet, a front membrane-walled water-cooled structure, a middle membrane-wall, an upper drum, a first membrane-wall upper header, a second membrane-wall upper header, a membrane-wall lower header, a rear membrane-wall left membrane wall, a right membrane wall, and a waste heat boiler body. The front membrane-walled water-cooled structure, middle membrane wall, upper drum, first membrane-wall upper header, second membrane-wall upper header, and membrane-wall lower header... The box, rear membrane wall, left membrane wall, and right membrane wall are all fixedly installed on the main body of the waste heat boiler. The flue gas inlet is opened on the front wall membrane water-cooled wall. The front end of the membrane wall is installed on one side of the front wall membrane water-cooled wall, and the rear end of the membrane wall is installed on one side of the rear membrane wall. The flue gas outlet is opened on the rear membrane wall. The front wall membrane water-cooled wall, the middle membrane wall, and the front end of the membrane wall form the first flue. The middle membrane wall, the rear membrane wall, and the rear end of the membrane wall form the second flue.

[0006] Furthermore, both the first and second flues are arranged in an inverted U-shape, and both the first and second flues are equipped with heat-insulating furnace walls on their outer sides, and the heat-insulating furnace walls are made of lightweight heat-insulating refractory concrete components.

[0007] Furthermore, two convection tube bundles are installed inside the second flue, and a convection tube bundle header is fixedly installed on each of the two convection tube bundles.

[0008] Furthermore, two downcomers and three steam pipes are provided between the front membrane water-cooled wall and the rear membrane wall, and all three steam pipes are connected to the upper boiler drum.

[0009] Furthermore, a first valve is fixedly installed on the downcomer pipe, and two branch pipes are fixedly connected to the outside of the downcomer pipe. An auxiliary component is provided between the two branch pipes. The auxiliary component includes a first water pipe, a purification tank, a water pump, a first water pipe, and a second valve.

[0010] Furthermore, one end of the first water pipe and one end of the second water pipe are fixed to the two branch pipes by bolts. The other end of the first water pipe is fixedly connected to the purification box, and the other end of the second water pipe is fixedly connected to the output end of the water pump. The water pump is fixedly installed on one side of the purification box, and the second valve is fixedly installed on the first water pipe.

[0011] Furthermore, a sealing plate is movably connected to the top of the purification box via a snap fastener, and an activated carbon plate is movably disposed at the bottom of the sealing plate.

[0012] As can be seen, in the above technical solution, the sealing plate is opened and the activated carbon plate is disassembled and replaced.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. In this utility model, the flue gas enters the first flue, which is composed of a front membrane water-cooled wall, a middle membrane wall, and the front end of the membrane wall. The flue gas turns 90 degrees upward and passes through the second flue, which is composed of a middle membrane wall, a rear membrane wall, and the rear end of the membrane wall. Then it passes through two convection tube bundles, and then the flue gas turns 90 degrees to the flue gas outlet, forming a complete flow channel. The structure is simple, the sealing performance is good, the air leakage coefficient is small, the boiler insulation effect is good, the heat loss is small, and the boiler thermal efficiency is high.

[0015] 2. This utility model uses a water pump to draw boiler water from the downcomer. The boiler water enters the first water pipe through one of the branch pipes. The activated carbon plate in the purification tank filters and purifies the boiler water. Finally, it flows back into the downcomer through the second water pipe and another branch pipe, forcibly pushing the boiler water to flow. This avoids the risk of water-cooled wall tubes overheating and bursting due to water flow stagnation. The structure is simple and the safety performance is high. Attached Figure Description

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the downcomer and the purification box of this utility model;

[0020] Figure 4 This is a schematic diagram of the assembly structure of the purification box and activated carbon plate of this utility model.

[0021] In the diagram: 1. Flue gas inlet; 2. Front membrane water-cooled wall; 3. Middle membrane wall; 4. Upper boiler drum; 5. Upper header of the first membrane wall; 6. Upper header of the second membrane wall; 7. Lower header of the membrane wall; 8. Rear membrane wall; 9. Convection tube bundle; 10. Upper header of the convection tube bundle; 11. Steam guide pipe; 12. Downcomer; 13. Flue gas outlet; 14. Insulated furnace wall; 15. Front end of the membrane wall; 16. Rear end of the membrane wall; 17. Left membrane wall; 18. Right membrane wall; 19. Branch pipe; 20. First water pipe; 21. Purification box; 22. Water pump; 23. Second water pipe; 24. First valve; 25. Second valve; 26. Sealing plate; 27. Activated carbon plate. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Refer to the instruction manual appendix Figure 1-4This embodiment describes a novel vertical acid waste heat boiler with a fully membrane-walled water-cooled structure, comprising an inlet 1, a front membrane-walled water-cooled structure 2, a middle membrane-wall 3, an upper drum 4, a first membrane-wall upper header 5, a second membrane-wall upper header 6, a membrane-wall lower header 7, a rear membrane-wall 8, a left membrane-wall 17, a right membrane-wall 18, and a waste heat boiler body. 8. The left membrane wall 17 and the right membrane wall 18 are both fixedly installed on the main body of the waste heat boiler. The flue gas inlet 1 is opened on the front wall membrane water-cooled wall 2. The front wall membrane water-cooled wall 2 has a membrane wall front end 15 installed on one side, and the rear wall membrane wall 8 has a membrane wall rear end 16 installed on one side. The rear wall membrane wall 8 has a flue gas outlet 13. The front wall membrane water-cooled wall 2, the middle membrane wall 3 and the membrane wall front end 15 form the first flue. The middle membrane wall 3, the rear membrane wall 8 and the membrane wall rear end 16 form the second flue.

[0024] Furthermore, both the first and second flues are arranged in an inverted U-shape. Insulating furnace walls 14 are provided on the outer sides of both the first and second flues. The insulating furnace walls 14 are made of lightweight insulated refractory concrete. Two convection tube bundles 9 are installed inside the second flue. Convection tube bundle upper headers 10 are fixedly installed on both convection tube bundles 9. Two downcomers 12 and three steam pipes 11 are provided between the front membrane water-cooled wall 2 and the rear membrane wall 8. All three steam pipes 11 are connected to the upper boiler drum 4.

[0025] Furthermore, a first valve 24 is fixedly installed on the downcomer 12. Two branch pipes 19 are fixedly connected to the outside of the downcomer 12. An auxiliary component is provided between the two branch pipes 19. The auxiliary component includes a first water pipe 20, a purification tank 21, a water pump 22, a first water pipe 20, and a second valve 25. One end of the first water pipe 20 and the second water pipe 23 are fixed to the two branch pipes 19 by bolts. The other end of the first water pipe 20 is fixedly connected to the purification tank 21, and the other end of the second water pipe 23 is fixedly connected to the output end of the water pump 22. The water pump 22 is fixedly installed on one side of the purification tank 21. The second valve 25 is fixedly installed on the first water pipe 20. A sealing plate 26 is movably connected to the top of the purification tank 21 by a snap fastener. An activated carbon plate 27 is movably provided at the bottom of the sealing plate 26.

[0026] In this process, after the boiler water is heated in the boiler, it enters the convection tube bundle 9 through the steam pipe 11. After absorbing the heat of the flue gas, it forms a steam-water mixture. The mixture becomes less dense and rises back to the boiler. The unvaporized boiler water returns to the header through the downcomer 12, completing the natural circulation. When the flue gas temperature fluctuates and the circulation power is insufficient, the first valve 24 is closed and the second valve 25 is opened. Then, the water pump 22 is started. The water pump 22 draws boiler water from the downcomer 12. The boiler water enters the first water pipe 20 through one of the branch pipes 19. The activated carbon plate 27 in the purification box 21 filters and purifies the boiler water. Finally, it flows back to the downcomer 12 through the second water pipe 23 and the other branch pipe 19, forcibly pushing the boiler water to flow. This avoids the risk of water-cooled wall tubes overheating and bursting due to water flow stagnation. The structure is simple and the safety performance is high. The sealing plate 26 is opened and the activated carbon plate 27 is disassembled and replaced.

[0027] The usage method of this embodiment is as follows:

[0028] In operation, flue gas enters the first flue from 1. The first flue consists of a front membrane water-cooled wall 2, a middle membrane wall 3, and a membrane wall front end 15, forming an initial upward channel for the flue gas. In this area, the flue gas flows from bottom to top and undergoes counter-radiative heat exchange with the surrounding membrane water-cooled walls. The flue gas then turns 90 degrees upward and passes through the second flue, which consists of a middle membrane wall 3, a rear membrane wall 8, and a membrane wall rear end 16. It then passes through two convection tube bundles 9, where the flue gas flows laterally across the outside of the tube bundles, further releasing heat through convection heat exchange. Subsequently, the flue gas turns 90 degrees to the flue gas outlet 13, forming a complete flow channel. The structure is simple, has good sealing performance, low air leakage coefficient, good boiler insulation effect, low heat loss, and high boiler thermal efficiency.

[0029] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel fully membrane-walled water-cooled vertical acid waste heat boiler, characterized in that: The system includes a flue gas inlet (1), a front membrane water-cooled wall (2), a middle membrane wall (3), an upper boiler drum (4), a first membrane wall upper header (5), a second membrane wall upper header (6), a membrane wall lower header (7), a rear membrane wall (8), a left membrane wall (17), a right membrane wall (18), and the main body of a waste heat boiler. 18) All are fixedly installed on the main body of the waste heat boiler. The flue gas inlet (1) is opened on the front wall membrane water-cooled wall (2). The front wall membrane water-cooled wall (2) has a membrane wall front end (15) installed on one side. The rear membrane wall (8) has a membrane wall rear end (16) installed on one side. The rear membrane wall (8) has a flue gas outlet (13). The front wall membrane water-cooled wall (2), the middle membrane wall (3) and the membrane wall front end (15) form the first flue. The middle membrane wall (3), the rear membrane wall (8) and the membrane wall rear end (16) form the second flue.

2. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 1, characterized in that: Both the first flue and the second flue are arranged in an inverted U-shape. Both the first flue and the second flue are provided with heat-insulating furnace walls (14) on their outer sides. The heat-insulating furnace walls (14) are made of lightweight heat-insulating refractory concrete.

3. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 1, characterized in that: The second flue has two convection tube bundles (9) installed inside, and each of the two convection tube bundles (9) has a convection tube bundle upper header (10) fixedly installed on it.

4. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 1, characterized in that: Two downcomers (12) and three steam pipes (11) are provided between the front membrane water-cooled wall (2) and the rear membrane wall (8), and all three steam pipes (11) are connected to the upper boiler drum (4).

5. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 4, characterized in that: A first valve (24) is fixedly installed on the downcomer (12). Two branch pipes (19) are fixedly connected to the outside of the downcomer (12). An auxiliary component is provided between the two branch pipes (19). The auxiliary component includes a first water pipe (20), a purification tank (21), a water pump (22), the first water pipe (20), and a second valve (25).

6. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 5, characterized in that: One end of the first water pipe (20) and the second water pipe (23) are fixed to the two branch pipes (19) by bolts. The other end of the first water pipe (20) is fixedly connected to the purification box (21), and the other end of the second water pipe (23) is fixedly connected to the output end of the water pump (22). The water pump (22) is fixedly installed on one side of the purification box (21), and the second valve (25) is fixedly installed on the first water pipe (20).

7. The novel fully membrane-wall water-cooled vertical acid waste heat boiler according to claim 5, characterized in that: The top of the purification box (21) is connected to a sealing plate (26) via a snap fastener, and an activated carbon plate (27) is movably provided at the bottom of the sealing plate (26).

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