Dry desulphurization device of fixed bed

Abstract

A fixed bed dry desulfurization device comprises a first desulfurization box, a second desulfurization box, a connecting pipeline, a gas inlet pipeline and a gas outlet pipeline, the second desulfurization box is arranged on the left side of the first desulfurization box, a desulfurizing agent is arranged in the first desulfurization box and the second desulfurization box, and the connecting pipeline is arranged between the first desulfurization box and the second desulfurization box. The second desulfurization box is provided with a gas inlet pipeline below the connecting pipeline, and the first desulfurization box is provided with a gas outlet pipeline below the connecting pipeline. Due to the arrangement of the double-layer desulfurization box, the flue gas passing resistance is reduced by reducing the volume of a single desulfurization box, increasing the flue gas circulation area and reducing the thickness of a material layer, and the double-layer desulfurization box can realize secondary desulfurization, so that the desulfurization efficiency of the flue gas is improved, and the desulfurization quality is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry desulfurization, and particularly relates to a fixed-bed dry desulfurization device. Background Art

[0002] Under the background of increasingly strict current environmental protection requirements, flue gas desulfurization technology, as a key means to reduce air pollution and control sulfur dioxide (SO2) emissions, its development and optimization are particularly important. The wet desulfurization technology, as one of the traditional and widely used desulfurization methods, occupies an important position in industries such as thermal power generation and iron and steel smelting by virtue of its stable operation and the significant advantage that the desulfurization efficiency can usually reach more than 90%. However, its technical system also faces many challenges: First, the desulfurization wastewater generated during the wet desulfurization process contains harmful substances such as heavy metal ions and chloride ions at high concentrations, which are difficult to treat, costly, and pose a risk of secondary pollution to the environment; Second, the wet flue gas discharged after desulfurization is prone to form a "white smoke" phenomenon when it encounters cold, affecting the visual effect and local environmental quality; Third, the wet method system has a complex structure, including multiple subsystems such as absorption towers, slurry circulation, and oxidation blowers, which require high professional skills for operation and maintenance personnel, and the daily operation and maintenance workload is large, increasing the operation cost. In contrast, the semi-dry desulfurization technology, as a transitional solution between the wet method and the dry method, although it can also reach a relatively high level in desulfurization efficiency, also faces some bottleneck problems. Its operation resistance is relatively large, especially when dealing with high-humidity flue gas, it is easy to cause equipment blockage or increased wear, affecting the system stability and service life. In addition, the energy consumption and cost of the semi-dry desulfurization technology are also relatively high, restricting its popularization in large-scale industrial applications. In view of this, the dry desulfurization technology has gradually attracted the attention of the industry due to its unique advantages. Among them, the fixed-bed dry desulfurization technology stands out with its strong adaptability to working conditions, small floor area, simple and flexible operation, etc. This technology places desulfurizing agents (such as calcium-based, sodium-based, etc.) in a fixed bed and uses the SO2 in the flue gas to react chemically with the desulfurizing agent to achieve the purpose of desulfurization. The fixed-bed design can effectively control the reaction conditions, improve the desulfurization efficiency, and at the same time avoid the wastewater problem and white smoke phenomenon in wet desulfurization. In addition, dry desulfurization does not require water resources, meets the construction requirements of a water-saving society, and has a simple system and low maintenance cost, which is of great significance for reducing the enterprise operation cost and improving the environmental protection benefit.

[0003] According to the Chinese patent with the patent number CN 217568189 U, a sulfur recovery tail gas dust removal, desulfurization and denitrification integrated system is disclosed, which includes a pretreatment device, a fixed bed dry desulfurization device, an SCR denitrification reactor and a induced draft fan; the first air outlet of the pretreatment device is connected to the second air inlet of the fixed bed dry desulfurization device, and the second air outlet of the fixed bed dry desulfurization device is connected to the third air inlet of the SCR denitrification reactor; the air inlet of the induced draft fan is connected to the third air outlet of the SCR denitrification reactor; the pretreatment device is used for tail gas dust removal, the fixed bed dry desulfurization device is used for tail gas desulfurization, and the SCR denitrification reactor is used for tail gas denitrification. The dry dust removal, desulfurization and denitrification integrated system for sulfur recovery tail gas of the present utility model realizes the integrated collaborative treatment of dust removal, desulfurization and denitrification of sulfur recovery tail gas. By using the dry dust removal, desulfurization and denitrification integrated system for sulfur recovery tail gas of the present utility model, water is not consumed during the treatment process and the by-products are easy to clean, improving the treatment effect of sulfur recovery tail gas.

[0004] However, during the use of the existing fixed bed dry desulfurization device, the flue gas needs to pass through the entire desulfurization device, and the traditional thickness of the material layer is relatively large, resulting in an increase in the resistance for the flue gas to pass through, causing the problem of low flue gas desulfurization efficiency. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the problem that during the use of the existing fixed bed dry desulfurization device, the flue gas needs to pass through the entire desulfurization device, and the traditional thickness of the material layer is relatively large, resulting in an increase in the resistance for the flue gas to pass through, causing the problem of low flue gas desulfurization efficiency.

[0006] The technical solution adopted to solve the above technical problem is:

[0007] A fixed bed dry desulfurization device includes a first desulfurization box, a second desulfurization box, a connecting pipe, an air inlet pipe and an air outlet pipe. The second desulfurization box is arranged on the left side of the first desulfurization box. Desulfurizing agents are arranged inside the first desulfurization box and the second desulfurization box. A connecting pipe is arranged between the first desulfurization box and the second desulfurization box. An air inlet pipe is arranged below the connecting pipe of the second desulfurization box, and an air outlet pipe is arranged below the connecting pipe of the first desulfurization box.

[0008] As a preferred technical solution of the present utility model, the first desulfurization box and the second desulfurization box are connected by a partition to improve the stability of the equipment, and protective boxes are arranged outside the first desulfurization box and the second desulfurization box.

[0009] As a preferred technical solution of the present utility model, the protective box is connected to the first desulfurization box and the second desulfurization box by a partition. Support rods are arranged below the protective box, and anti-slip plates are arranged below the support rods. Anti-slip strips are adhered to the lower side of the anti-slip plates, which can effectively increase the friction between the equipment and the ground.

[0010] As a preferred technical solution of the present utility model, an air inlet is provided on the protection box, the air inlet is connected to an air inlet pipe, an air outlet is provided on the upper side of the air inlet of the protection box, and the air outlet is connected to an air outlet pipe.

[0011] As a preferred technical solution of the present utility model, a viewing window is provided on the back of the protection box, a sliding protection plate is provided on the viewing window, and a sliding handle is provided on the sliding protection plate.

[0012] As a preferred technical solution of the present utility model, a feed inlet is provided on the upper sides of the first desulfurization box and the second desulfurization box, a first sliding cover plate is provided on the feed inlet, a discharge outlet is provided on the lower sides of the first desulfurization box and the second desulfurization box, and a second sliding cover plate is provided on the discharge outlet.

[0013] The beneficial effects of the present utility model are as follows:

[0014] Since the present utility model is provided with a double-layer desulfurization box, by reducing the volume of a single desulfurization box, increasing the flue gas circulation area at the same time, reducing the thickness of the material layer, thereby reducing the resistance of the flue gas passing through, and the double-layer desulfurization box can achieve secondary desulfurization, which not only improves the desulfurization efficiency of the flue gas but also improves the desulfurization quality. Description of the Drawings

[0015] Figure 1 is the first axonometric view of the present utility model;

[0016] Figure 2 is the second axonometric view of the present utility model;

[0017] Figure 3 is the third axonometric view of the present utility model;

[0018] Figure 4 is Figure 2 the partial enlarged view of A in

[0019] In the figure: 1, the first desulfurization box; 2, the second desulfurization box; 3, the connecting pipe; 4, the air inlet pipe; 5, the air outlet pipe; 6, the partition board; 7, the protection box; 8, the support rod; 9, the anti-slip plate; 10, the air inlet; 11, the air outlet; 12, the feed inlet; 13, the first sliding cover plate; 14, the discharge outlet; 15, the second sliding cover plate; 16, the viewing window; 17, the sliding protection plate; 18, the sliding handle. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the above description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "one side" and "the other side" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0024] In addition, terms such as "the same" do not mean that the components are absolutely the same, but there may be slight differences. The term "vertical" only means that the positional relationship between components is more vertical relative to "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0025] Embodiment 1

[0026] In Figures 1-4 , the present utility model provides a technical solution: a fixed-bed dry desulfurization device, including a first desulfurization tank 1, a second desulfurization tank 2, a connecting pipe 3, an inlet pipe 4, and an outlet pipe 5. A second desulfurization tank 2 is provided on the left side of the first desulfurization tank 1. Desulfurizing agents are provided inside the first desulfurization tank 1 and the second desulfurization tank 2. A connecting pipe 3 is provided between the first desulfurization tank 1 and the second desulfurization tank 2. An inlet pipe 4 is provided under the connecting pipe 3 of the second desulfurization tank 2. An outlet pipe 5 is provided under the connecting pipe 3 of the first desulfurization tank 1.

[0027] In one aspect of this embodiment, the first desulfurization tank 1 and the second desulfurization tank 2 are connected by a partition plate 6. A protective tank 7 is provided outside the first desulfurization tank 1 and the second desulfurization tank 2. The protective tank 7 can protect the first desulfurization tank 1 and the second desulfurization tank 2. The protective tank 7 is connected to the first desulfurization tank 1 and the second desulfurization tank 2 through the partition plate 6. A support rod 8 is provided on the lower side of the protective tank 7, and an anti-slip plate 9 is provided on the lower side of the support rod 8. Anti-slip strips are adhered to the lower side of the anti-slip plate 9.

[0028] In one aspect of this embodiment, an air inlet 10 is provided on the protective tank 7. The air inlet 10 is connected to the air inlet pipe 4. An air outlet 11 is provided on the upper side of the air inlet 10 of the protective tank 7. The air outlet 11 is connected to the air outlet pipe 5. A viewing window 16 is provided on the back of the protective tank 7, which is convenient for users to observe the outer surface conditions of the first desulfurization tank 1 and the second desulfurization tank 2 and check the working conditions. A sliding protection plate 17 is provided on the viewing window 16, and a sliding handle 18 is provided on the sliding protection plate 17, which is convenient for users to slide. A feed inlet 12 is provided on the upper side of the first desulfurization tank 1 and the second desulfurization tank 2. A first sliding cover plate 13 is provided on the feed inlet 12. A discharge outlet 14 is provided on the lower side of the first desulfurization tank 1 and the second desulfurization tank 2. A second sliding cover plate 15 is provided on the discharge outlet 14.

[0029] The working principle of the present utility model is as follows: During the use of the present utility model, the flue gas enters the second desulfurization tank 2 from the air inlet 10 through the air inlet pipe 4. After being treated by the second desulfurization tank 2, it enters the first desulfurization tank 1 through the connecting pipe 3 on the upper side. After being secondary-treated by the first desulfurization tank 1, it flows out to the air outlet 11 through the air outlet pipe 5 on the lower side, completing the secondary desulfurization of the flue gas, which not only improves the desulfurization efficiency of the flue gas but also improves the desulfurization quality.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A fixed bed dry desulfurization device, comprising a first desulfurization box (1), a second desulfurization box (2), a connecting pipe (3), an air inlet pipe (4) and an air outlet pipe (5), characterized in that: A second desulfurization box (2) is provided on the left side of the first desulfurization box (1); a desulfurizer is provided inside the first desulfurization box (1) and the second desulfurization box (2); a connecting pipe (3) is provided between the first desulfurization box (1) and the second desulfurization box (2); the second desulfurization box (2) is provided with an air inlet pipe (4) at the lower side of the connecting pipe (3); and the first desulfurization box (1) is provided with an air outlet pipe (5) at the lower side of the connecting pipe (3).

2. A fixed bed dry desulfurization device according to claim 1, characterized in that: The first desulfurization box (1) and the second desulfurization box (2) are connected via a partition (6), and a protection box (7) is provided outside the first desulfurization box (1) and the second desulfurization box (2).

3. A fixed bed dry desulfurization device according to claim 2, characterized in that: The protection box (7) is connected to the first desulfurization box (1) and the second desulfurization box (2) via a partition (6); a support rod (8) is provided on the lower side of the protection box (7); an anti-skid plate (9) is provided on the lower side of the support rod (8); and an anti-skid strip is bonded to the lower side of the anti-skid plate (9).

4. A fixed bed dry desulfurization device according to claim 3, characterized in that: The protection box (7) is provided with an air inlet (10), the air inlet (10) is connected to the air inlet pipeline (4), and the protection box (7) is provided with an air outlet (11) on the upper side of the air inlet (10), the air outlet (11) is connected to the air outlet pipeline (5).

5. A fixed bed dry desulfurization device according to claim 4, characterized in that: The back of the protection box (7) is provided with a visual window (16), the visual window (16) is provided with a sliding protection plate (17), and the sliding protection plate (17) is provided with a sliding handle (18).

6. A fixed bed dry desulfurization device according to claim 5, characterized in that: The first desulfurization box (1) and the second desulfurization box (2) are provided with a feed port (12) on the upper side, and a first sliding cover plate (13) is provided on the feed port (12); the first desulfurization box (1) and the second desulfurization box (2) are provided with a discharge port (14) on the lower side, and a second sliding cover plate (15) is provided on the discharge port (14).

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