Flue gas dust removal, desulfurization and purification equipment for coal-fired boiler

Abstract

The utility model discloses coal-fired boiler flue gas dedusting, desulfurizing and purifying equipment which comprises a cooling tank communicated with a boiler flue gas outlet end and a desulfurizing pond below, and a water tank outside the cooling tank and an annular water pipe on the inner wall of the tank form a cooling loop through a first water pump, a second water pump, a water inlet pipe, a water outlet pipe and the tank. The middle water pipe is arranged on the annular water pipe and used for spraying water to remove dust, and the diffusion mechanism connected with the liquid outlet holes can scatter water flow to achieve cooling and cleaning. The bottommost diffusion blade is connected with a stirring blade through a second rotating shaft, so that the desulfurization pool can be stirred. During working, the cooling loop cools the tank body, the water spraying and diffusion mechanism removes dust, and the diffusion blade drives the stirring blade to desulfurize. The equipment effectively solves the problems of poor cooling and dust removal effects and poor function linkage of traditional equipment, has the advantages of efficient cooling, dust removal and desulfurization, stable equipment operation, low energy consumption and the like, and has wide application prospects in the field of flue gas purification of coal-fired boilers.

Description

Technical Field

[0001] This utility model relates to the technical field of coal-fired boiler equipment, and in particular to a flue gas dust removal, desulfurization and purification device for coal-fired boilers. Background Technology

[0002] In modern industrial production, coal-fired boilers are widely used in numerous fields. However, the coal combustion process generates a large amount of flue gas, which contains a significant amount of particulate matter and harmful pollutants such as sulfur dioxide. If these pollutants are directly released into the atmosphere, they will not only severely impact air quality, leading to frequent smog and other severe weather phenomena, but also cause immense damage to the ecological environment, triggering acid rain and other hazards, posing a serious threat to the survival of plants and animals and human health. Therefore, dust removal and desulfurization purification treatment of flue gas from coal-fired boilers is particularly necessary; this is a key measure for achieving sustainable development and practicing environmental protection principles.

[0003] Traditional flue gas dust removal and desulfurization purification equipment for coal-fired boilers has revealed numerous problems in practical use. For example, in terms of cooling, most traditional equipment uses a relatively simple cooling method, which cannot efficiently and accurately cool the tank from all directions, resulting in poor stability during long-term operation in high-temperature environments. In the dust removal stage, the design of its water spray mechanism is not optimized, and the water spray coverage is limited, making it difficult to comprehensively and effectively capture dust in the flue gas, resulting in unsatisfactory dust removal effects. Moreover, the functions of traditional equipment are relatively independent, and there is a lack of effective linkage mechanisms between the various stages. It is impossible to rationally utilize the energy or water flow from the dust removal process in other stages, such as the desulfurization stage, resulting in low overall equipment operating efficiency and high energy consumption. Utility Model Content

[0004] The purpose of this utility model is to provide a dust removal and desulfurization purification device for flue gas of coal-fired boilers, so as to solve the problems of poor cooling effect, incomplete dust removal, poor functional linkage and low operating efficiency of traditional flue gas dust removal and desulfurization purification devices for coal-fired boilers.

[0005] This utility model is achieved through the following technical solution:

[0006] A flue gas dust removal and desulfurization purification device for a coal-fired boiler includes a cooling tank connected to the flue gas outlet of the boiler, a desulfurization pool fixedly connected to the bottom of the cooling tank, a water tank on the outside of the cooling tank, a first water pump and a second water pump on the water tank, an annular water pipe fixedly arranged around the circumference of the cooling tank on the inner wall of the cooling tank, an inlet pipe connecting the first water pump and the annular water pipe, and an outlet pipe connecting the second water pump and the annular water pipe.

[0007] The annular water pipe is equipped with a cooling mechanism for dissipating heat and cooling the flue gas, and the cooling mechanism is equipped with a diffusion mechanism for removing dust from the flue gas.

[0008] Preferably, the cooling mechanism includes an intermediate water pipe fixedly disposed on the annular water pipe, with both ends of the intermediate water pipe connected to the annular water pipe; and an outlet hole is provided on the intermediate water pipe.

[0009] Preferably, the diffusion mechanism includes a water spray pipe fixedly connected to the liquid outlet, one end of the water spray pipe being connected to the intermediate water pipe, and a connecting rod fixedly provided at the other end of the water spray pipe. A first rotating shaft is rotatably provided on the connecting rod, and a driving blade is provided at one end of the first rotating shaft near the intermediate water pipe. A diffusion blade is fixed at the other end of the first rotating shaft.

[0010] Preferably, there are multiple annular water pipes, which are evenly spaced and fixedly installed on the inner wall of the cooling tank.

[0011] Preferably, each of the annular water pipes is provided with a diffusion mechanism.

[0012] Preferably, the cross-sectional shape of the annular water pipe is rectangular.

[0013] Preferably, the cross-sectional shape of the intermediate water pipe is rectangular.

[0014] Preferably, in the cooling tank, a second rotating shaft is fixedly connected to the diffuser blade at the bottom, one end of the second rotating shaft is fixedly connected to the diffuser blade, and the other end of the second rotating shaft is fixedly connected to a stirring blade.

[0015] Preferably, the axes of the first rotating shaft and the second rotating shaft in the length direction coincide.

[0016] Compared with existing technologies, this invention has the following advantages and beneficial effects: The external water tank of the cooling tank, in conjunction with the first and second water pumps and the annular water pipe, constructs a highly efficient cooling circuit, which can cool the tank body comprehensively and precisely, ensuring stable operation of the equipment in high-temperature environments. The cooling and diffusion mechanism on the annular water pipe can effectively expand the spray coverage area, comprehensively capture flue gas dust, achieve efficient dust removal, and provide a reliable and practical technical solution for the purification of flue gas from coal-fired boilers. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the cooling tank of this utility model, intended to show the installation positions of the intermediate water pipe and the annular water pipe;

[0020] Figure 3 for Figure 1 The enlarged view at point A is intended to show a schematic diagram of the cooling mechanism and the diffusion mechanism.

[0021] The reference numerals in the attached figures represent:

[0022] 10. Cooling tank; 11. Annular water pipe; 12. Intermediate water pipe; 13. Spray pipe; 14. First rotating shaft; 141. Drive blade; 142. Diffuser blade; 15. Inlet pipe; 16. Outlet pipe; 17. Second water pump; 18. First water pump; 19. Second rotating shaft; 191. Stirring blade; 20. Desulfurization tank; 21. Water tank. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, without excluding other elements or objects.

[0024] Example 1:

[0025] like Figures 1 to 3 As shown, this embodiment provides a flue gas dust removal and desulfurization purification device for a coal-fired boiler, including a cooling tank 10 connected to the flue gas outlet of the boiler, a desulfurization pool 20 fixedly connected to the bottom of the cooling tank 10, a water tank 21 on the outside of the cooling tank 10, a first water pump 18 and a second water pump 17 on the water tank 21, an annular water pipe 11 fixedly arranged around the circumference of the cooling tank 10 on the inner wall of the cooling tank 10, an inlet pipe 15 connecting the first water pump 18 and the annular water pipe 11, and an outlet pipe 16 connecting the second water pump 17 and the annular water pipe 11; the annular water pipe 11 is provided with a cooling mechanism for heat dissipation and cooling of the flue gas, and the cooling mechanism is provided with a diffusion mechanism for flue gas dust removal.

[0026] This solution aims to address the problems of poor cooling and dust removal efficiency and weak functional integration in traditional flue gas dust removal and desulfurization purification equipment for coal-fired boilers. In practical applications, a cooling circulation system is constructed by a water tank 21, a first water pump 18, a second water pump 17, an inlet pipe 15, an outlet pipe 16, and an annular water pipe 11. The cooling tank 10 is used to contain the flue gas. During operation, the first water pump 18 pumps water from the water tank 21 into the annular water pipe 11 through the inlet pipe 15 to cool the cooling tank 10. The second water pump 17 then pumps the water from the annular water pipe 11 back to the water tank 21, achieving circulating cooling. The cooling mechanism and the diffusion mechanism work together to dissipate heat, cool, and remove dust from the flue gas. This solution significantly improves cooling and dust removal efficiency and reduces equipment failure rate. As an alternative, the water tank 21 can be made of corrosion-resistant material to adapt to special working environments, and flow regulating valves can be added to the inlet pipe 15 and the outlet pipe 16 for precise control of water flow rate.

[0027] In this embodiment, the cooling mechanism includes an intermediate water pipe 12 fixed on the annular water pipe 11, with both ends of the intermediate water pipe 12 connected to the annular water pipe 11; and an outlet hole is provided on the intermediate water pipe 12.

[0028] When water circulates in the annular water pipe 11, some water flows into the intermediate water pipe 12 and is sprayed out from the outlet, coming into contact with the dust in the flue gas to remove dust. In practical applications, this structure allows for a wider spray coverage area, effectively improving the dust removal effect, and since water circulation is achieved through the annular water pipe 11, no additional power source is required. If the outlet becomes clogged, a removable filter screen can be installed on the intermediate water pipe 12, or a larger diameter outlet can be used as an alternative.

[0029] In this embodiment, the diffusion mechanism includes a water spray pipe 13 fixedly connected to the liquid outlet hole. One end of the water spray pipe 13 is connected to the intermediate water pipe 12. The other end of the water spray pipe 13 is fixedly provided with a connecting rod. A first rotating shaft 14 is rotatably provided on the connecting rod. A drive blade 141 is provided at one end of the first rotating shaft 14 near the intermediate water pipe 12. A diffusion blade 142 is fixed at the other end of the first rotating shaft 14.

[0030] During operation, the water jet from the outlet impacts the drive blades 141, causing the first shaft 14 to rotate. This, in turn, drives the diffuser blades 142 to rotate, dispersing the water flow and allowing it to contact the inner wall of the tank more extensively. In practical applications, this greatly enhances the cooling and cleaning effect, while also saving energy by utilizing the water flow's own power to drive the rotation. An alternative design could be to make the drive blades 141 and diffuser blades 142 detachable, facilitating the replacement of blades of different specifications according to different operating conditions.

[0031] In this embodiment, there are multiple annular water pipes 11, which are fixedly arranged on the inner wall of the cooling tank 10 at even intervals.

[0032] Multiple annular water pipes 11 operate simultaneously, expanding the coverage of cooling and water spraying. In practical applications, this allows for more comprehensive cooling of the cooling tank 10, improving the efficiency and uniformity of flue gas dust removal.

[0033] In this embodiment, each annular water pipe 11 is equipped with a diffusion mechanism.

[0034] Each annular water pipe 11 is equipped with a diffusion mechanism, which ensures good water flow diffusion throughout the entire cooling tank 10, guaranteeing uniform cooling, dust removal, and cleaning effects. In practical applications, this improves the overall purification performance of the equipment.

[0035] In this embodiment, the annular water pipe 11 has a rectangular cross-sectional shape. The rectangular cross-section of the annular water pipe 11 increases the contact area with the inner wall of the cooling tank 10, allowing for more thorough heat exchange and improving cooling efficiency with the same water volume. In practical applications, this can accelerate the cooling rate of the cooling tank 10 and enhance the stability of the equipment.

[0036] In this embodiment, the cross-sectional shape of the intermediate water pipe 12 is rectangular. This allows the water to be more evenly dispersed when flowing inside the pipe, and the water sprayed from the outlet hole is more evenly distributed, thereby improving the dust removal effect.

[0037] Example 2:

[0038] In this embodiment, a second rotating shaft 19 is fixedly connected to the diffuser blade 142 at the bottom of the cooling tank 10. One end of the second rotating shaft 19 is fixedly connected to the diffuser blade 142, and the other end of the second rotating shaft 19 is fixedly connected to a stirring blade 191. This can improve the mixing reaction efficiency of the desulfurizing agent and sulfur in the flue gas, enhance the desulfurization effect, and eliminate the need for an additional power source.

[0039] The work process is as follows:

[0040] High-temperature flue gas from the boiler enters from the top of the cooling tank 10. Water in the water tank 21, driven by the first water pump 18, flows through the inlet pipe 15 into the annular water pipe 11 on the inner wall of the cooling tank 10, cooling the tank. The water is then pumped back to the water tank 21 by the second water pump 17 for circulation. During circulation in the annular water pipe 11, some water flows into the middle water pipe 12 and sprays out from the outlet hole for preliminary dust removal. The sprayed water impacts the drive blades 141, causing the first rotating shaft 14 and diffuser blades 142 to rotate, dispersing the water flow and ensuring full contact with the inner wall of the tank for cooling and cleaning. The diffuser blades 142 at the bottom drive the stirring blades 191 via the second rotating shaft 19 to mix the desulfurizing agent and flue gas in the desulfurization tank 20, achieving efficient desulfurization. Finally, the purified gas is discharged from the equipment.

[0041] In this embodiment, the axes of the first rotating shaft 14 and the second rotating shaft 19 are aligned along their length. This ensures that the power for rotating the diffuser blades 142 is transmitted smoothly and efficiently to the stirring blades 191, reducing power loss. In practical applications, this ensures stable rotation of the stirring blades 191 and improves desulfurization efficiency.

[0042] In practical applications, this device demonstrates numerous beneficial effects. Through the cooling circuit formed by the annular water pipe 11, water tank 21, and water pump, it efficiently cools the tank, ensuring stable operation of the equipment under high-temperature conditions. The intermediate water pipe 12 and diffusion mechanism achieve comprehensive and efficient flue gas dust removal; water flowing through the diffusion mechanism fully contacts the inner wall of the tank, enhancing the cooling and cleaning effect. Simultaneously, the linkage between the diffusion mechanism and the stirring blades 191 improves the desulfurization efficiency of the desulfurization tank 20 without additional power, significantly improving the overall purification effect of flue gas from coal-fired boilers, reducing equipment failure rates, and lowering maintenance costs, resulting in significant environmental and economic benefits.

[0043] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure. The following points need to be noted: In the accompanying drawings of the embodiments of this utility model, only the structures involved in the embodiments of this utility model are shown; other structures can refer to general designs.

Claims

1. A coal-fired boiler flue gas dedusting and desulfurization purification device, comprising a cooling tank (10) in communication with the flue gas outlet end of the boiler, and a desulfurization tank (20) fixedly communicated below the cooling tank (10), characterized in that, an outer side of the cooling tank (10) is provided with a water tank (21), the water tank (21) is provided with a first water pump (18) and a second water pump (17), an inner wall of the cooling tank (10) is fixedly provided with an annular water pipe (11) arranged around the circumference of the cooling tank (10), a water inlet pipe (15) for communicating the first water pump (18) and the annular water pipe (11) is arranged between the first water pump (18) and the annular water pipe (11), and a water outlet pipe (16) for communicating the second water pump (17) and the annular water pipe (11) is arranged between the second water pump (17) and the annular water pipe (11); the annular water pipe (11) is provided with a cooling mechanism for heat dissipation and cooling of flue gas, and the cooling mechanism is provided with a diffusion mechanism for flue gas dedusting.

2. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 1, characterized in that, The cooling mechanism comprises an intermediate water pipe (12) fixedly arranged on the annular water pipe (11), both ends of the intermediate water pipe (12) are respectively communicated with the annular water pipe (11), and the intermediate water pipe (12) is provided with a liquid outlet hole.

3. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 2, characterized in that, The diffusion mechanism comprises a water spraying pipe (13) fixedly connected to the liquid outlet hole, one end of the water spraying pipe (13) is communicated with the intermediate water pipe (12), the other end of the water spraying pipe (13) is fixedly provided with a connecting rod, a first rotating shaft (14) is rotatably arranged on the connecting rod, a driving blade (141) is arranged on one end of the first rotating shaft (14) close to the intermediate water pipe (12), and a diffusion blade (142) is fixedly arranged on the other end of the first rotating shaft (14).

4. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 3, characterized in that, The number of the annular water pipes (11) is multiple, and the multiple annular water pipes (11) are uniformly and fixedly arranged on the inner wall of the cooling tank (10).

5. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 4, characterized in that, The diffusion mechanism is arranged on each annular water pipe (11).

6. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 1, characterized in that, The annular water pipe (11) has a rectangular cross-sectional shape.

7. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 2, characterized in that, The intermediate water pipe (12) has a rectangular cross-sectional shape.

8. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 5, characterized in that, In the cooling tank (10), a second rotating shaft (19) is fixedly connected to the diffusion blade (142) at the bottom, one end of the second rotating shaft (19) is fixedly connected to the diffusion blade (142), and a stirring blade (191) is fixedly connected to the other end of the second rotating shaft (19).

9. A coal-fired boiler flue gas dedusting and desulfurizing purification device according to claim 8, characterized in that, The first rotating shaft (14) and the second rotating shaft (19) have the same length direction axis.

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