Efficient SNCR (selective non-catalytic reduction) denitration device

Abstract

The utility model discloses an efficient SNCR (Selective Non Catalytic Reduction) denitration device, which is characterized in that a rotating shaft and a spiral sheet are arranged in an injection barrel, so that the spiral sheet rotates to drive liquid to generate centrifugal force, and a reducing agent is in an atomized state, so that the reducing agent can be uniformly sprayed in a hearth to improve the mixing reaction efficiency with nitrogen oxide; the reducing agent in the liquid pipeline is pressurized through the pressurizing pipe, so that the spraying strength and the spraying range of the reducing agent can be further improved, the reducing agent can better cover each corner in the hearth, and the denitration effect is improved; the pressure of flowing liquid is changed by changing the pressure of the pressurizing pipe, the rotating speed of the spiral piece can be controlled, and then the spraying strength and uniformity are adjusted to adapt to different denitration requirements, so that under the design effect, the spiral piece can be driven to rotate through the liquid pressure without additional power, and the denitration efficiency is improved. Compared with other spraying systems needing extra power, energy can be saved, and the operation cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler denitration, in particular to a high-efficiency SNCR denitration device. Background Art

[0002] SNCR (Selective Non-Catalytic Reduction) denitrification device is a device used to reduce the emission of nitrogen oxides (NOx) generated during the combustion process. This device achieves the denitrification effect by injecting a reducing agent (usually ammonia or urea solution) into the flue gas of the burner or boiler to react with nitrogen oxides and convert them into nitrogen and water vapor.

[0003] At present, a spray gun is usually used to spray the reducing agent directly into the furnace. However, the spray gun can usually only spray the reducing agent partially into the furnace, which leads to uneven distribution of the reducing agent in the combustion area, making it difficult to ensure that the reducing agent and nitrogen oxides are fully mixed and reacted, thereby affecting the denitrification efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient SNCR denitration device, which can spray the reducing agent evenly in the furnace, and can make the reducing agent and nitrogen oxides fully mixed and reacted, and can also further improve the denitration efficiency.

[0005] In order to solve the above technical problems, the utility model adopts a technical solution:

[0006] An efficient SNCR denitrification device, comprising:

[0007] A boiler body, a flue gas pipe is fixedly arranged on one side of the boiler body, a liquid pipe is fixedly arranged on the other side, and a booster pipe is fixedly arranged on one side of the liquid pipe;

[0008] An injection tube is arranged at the upper part of the inner cavity of the boiler body, and the injection tube is connected to the liquid pipeline through a connecting pipe;

[0009] A rotating shaft is rotatably arranged in the inner cavity of the spraying tube, and a plurality of spiral blades are fixedly arranged on the rotating shaft.

[0010] According to some embodiments, the injection tube is arranged at the upper part of the inner cavity of the boiler body through a mounting rod.

[0011] According to some embodiments, the injection cartridge comprises:

[0012] A water tank, one side of which is fixedly connected with the connecting pipe;

[0013] The atomizing spray plate is fixedly arranged on the upper and lower sides of the water tank, a plurality of spray holes are opened on the atomizing spray plate, and the rotating shaft is rotatably arranged between the two atomizing spray plates.

[0014] According to some embodiments, a heating plate is disposed in the boiler body, and a controller is disposed outside the boiler body, and the controller is electrically connected to the heating plate.

[0015] According to some embodiments, a water outlet pipe is fixedly provided on one side of the lower portion of the boiler body.

[0016] According to some embodiments, a guide plate is provided at the bottom of the inner cavity of the boiler body, and the guide plate is configured as an inclined structure.

[0017] Beneficial effects:

[0018] 1. By arranging a rotating shaft and a spiral blade in the injection tube, the rotation of the spiral blade drives the liquid to generate centrifugal force, so that the reducing agent forms an atomized state, so that the reducing agent can be evenly sprayed in the furnace to improve the mixing reaction efficiency with nitrogen oxides.

[0019] 2. By pressurizing the reducing agent in the liquid pipeline through the booster pipe, the spraying intensity and spraying range of the reducing agent can be further improved, so that the reducing agent can better cover every corner of the furnace and improve the denitrification effect.

[0020] 3. By changing the pressure of the booster pipe, and thus the pressure of the flowing liquid, the rotation speed of the spiral blade can be controlled, and then the intensity and uniformity of the spray can be adjusted to meet different denitrification needs. Under such a design, the spiral blade can be driven to rotate by liquid pressure without additional power. Compared with other spray systems that require additional power, it can save energy and reduce operating costs.

[0021] Additional aspects and advantages of the utility model will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a schematic diagram of the utility model;

[0024] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0025] Figure 3 for Figure 2 A three-dimensional cross-sectional view of the injection cylinder, connecting pipe, rotating shaft, spiral blade and mounting rod shown in FIG.

[0026] In the figure, 1 is a boiler body, 11 is a flue gas pipe, 12 is a liquid pipe, 13 is a water outlet pipe, 14 is a guide plate, 2 is a booster pipe, 3 is a jet tube, 31 is a water tank, 32 is an atomizing spray plate, 33 is a spray hole, 4 is a connecting pipe, 5 is a rotating shaft, 6 is a spiral sheet, 7 is a mounting rod, 8 is a heating plate, and 9 is a controller. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Combination Figures 1 to 3 As shown, a high-efficiency SNCR denitrification device includes a boiler body 1, a booster pipe 2, an injection tube 3, a connecting pipe 4, a rotating shaft 5 and a spiral blade 6.

[0032] A flue gas duct 11 is fixedly arranged on one side of the boiler body 1, a liquid duct 12 is fixedly arranged on the other side, and a booster pipe 2 is fixedly arranged on one side of the liquid duct 12; an injection tube 3 is arranged at the upper part of the inner cavity of the boiler body 1, and the injection tube 3 is connected to the liquid duct 12 through a connecting pipe 4; a rotating shaft 5 is rotatably arranged in the inner cavity of the injection tube 3, and a plurality of spiral blades 6 are fixedly arranged on the rotating shaft 5.

[0033] Among them, by arranging a rotating shaft 5 and a spiral blade 6 in the injection tube 3, the rotation of the spiral blade 6 drives the liquid to generate centrifugal force, so that the reducing agent forms an atomized state, so that the reducing agent can be evenly sprayed in the furnace to improve the mixing reaction efficiency with nitrogen oxides; by pressurizing the reducing agent in the liquid pipeline 12 through the booster pipe 2, the spraying intensity and spraying range of the reducing agent can be further improved, so that the reducing agent can better cover every corner of the furnace and improve the denitrification effect; by changing the pressure of the booster pipe 2, thereby changing the pressure of the flowing liquid, the rotation speed of the spiral blade 6 can be controlled, and then the intensity and uniformity of the spray can be adjusted to meet different denitrification requirements. Under such a design, the spiral blade 6 can be driven to rotate by liquid pressure without additional power. Compared with other spray systems that require additional power, it can save energy and reduce operating costs.

[0034] When performing denitration treatment, the flue gas containing nitrogen oxides is first introduced into the inner cavity of the boiler body 1 from the flue gas pipe 11. Then, a reducing agent, such as urea solution or ammonia water, is transported to the injection tube 3 through the liquid pipe 12. The booster pipe 2 pressurizes the reducing agent in the liquid pipe 12 to increase its spraying intensity and spraying range. Inside the injection tube 3, the spiral blade 6 on the rotating shaft 5 rotates with the drive of the liquid pressure. This rotation generates centrifugal force, causing the reducing agent to form an atomized state and spray evenly into the furnace. This can improve the efficiency of the mixed reaction of the reducing agent and nitrogen oxides, thereby effectively achieving denitration. In addition, by changing the pressure of the booster pipe 2, the spray intensity and uniformity of the reducing agent can be adjusted to meet different denitration requirements. Under this design, the spiral blade 6 can be driven to rotate by liquid pressure without additional power. Compared with other spray systems that require additional power, it can save energy and reduce operating costs.

[0035] Combination Figure 2 and Figure 3As shown, the injection tube 3 is arranged at the upper part of the inner cavity of the boiler body 1 through the mounting rod 7. Under the action of the mounting rod 7, the mounting rod 7 can firmly position the injection tube 3 at the upper part of the inner cavity of the boiler body 1. The existence of the mounting rod 7 prevents the injection tube 3 from directly contacting the top of the inner cavity of the boiler body 1, reducing the impact of high-temperature flue gas on the injection tube 3 and extending the service life of the equipment. Since the mounting rod 7 separates the injection tube 3 from the top of the inner cavity, the reducing agent can be evenly sprayed into the furnace from the upper and lower sides of the injection tube 3, thereby improving the denitration efficiency.

[0036] Combination Figure 3 As shown, the spray tube 3 includes: a water tank 31, an atomizing spray plate 32 and a spray hole 33. A connecting pipe 4 is fixedly connected to one side of the water tank 31; the atomizing spray plate 32 is fixedly arranged on the upper and lower sides of the water tank 31, and a plurality of spray holes 33 are opened on the atomizing spray plate 32. A rotating shaft 5 is rotatably arranged between the two atomizing spray plates 32.

[0037] The reducing agent enters the boost pipe 2 through the liquid pipe 12, and after being boosted, flows into the water tank 31 from the connecting pipe 4. The high-pressure reducing agent generates a high-speed flow in the water tank 31, driving the spiral blade 6 on the rotating shaft 5 to rotate. The rotation of the spiral blade 6 generates centrifugal force, so that the reducing agent in the water tank 31 is atomized and evenly sprayed into the furnace through the spray holes 33 on the atomizing spray plate 32. The sprayed atomized reducing agent is fully mixed with the nitrogen oxides in the furnace and a chemical reaction occurs to generate harmless nitrogen and water vapor, thereby achieving the purpose of denitrification.

[0038] Combination Figure 2 As shown, a heating plate 8 is provided inside the boiler body 1, and a controller 9 is provided outside the boiler body 1, and the controller 9 is electrically connected to the heating plate 8. The heating plate 8 can provide heat energy for the boiler to maintain the temperature in the furnace. The controller 9 can adjust the working state of the heating plate 8 according to actual needs to keep the temperature in the furnace within a suitable range.

[0039] Combination Figure 1 and Figure 2 As shown, a water outlet pipe 13 is fixedly provided on one side of the lower part of the boiler body 1. During the operation of the boiler, part of the water will be lost with the discharge of the flue gas, and the other part will condense in the furnace to form water droplets. If these water droplets are not discharged in time, they will affect the thermal efficiency and operational safety of the boiler. Therefore, through the water outlet pipe 13, this part of the water can be effectively discharged to ensure the normal operation of the boiler. The water outlet pipe 13 can also be used to discharge the sewage after the boiler is cleaned to keep the inside of the boiler clean. At the same time, the water outlet pipe 13 and the flue gas duct 11 form a complete flue gas circulation system, realizing an inlet and outlet flue gas flow, which is conducive to the effect of discharging the purified flue gas after denitrification treatment from the water outlet pipe 13, and improves the working efficiency and safety of the boiler body 1.

[0040] Combination Figure 2 As shown, a guide plate 14 is provided at the bottom of the inner cavity of the boiler body 1 , and the guide plate 14 is arranged in an inclined structure so that the guide plate 14 can guide the flow of the water vapor so as to discharge the water vapor from the inner cavity of the boiler body 1 .

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An efficient SNCR denitrification device, characterized in that: include: A boiler body (1), a flue gas pipe (11) being fixedly arranged on one side of the boiler body (1), a liquid pipe (12) being fixedly arranged on the other side, and a booster pipe (2) being fixedly arranged on one side of the liquid pipe (12); An injection tube (3) is arranged at the upper part of the inner cavity of the boiler body (1), and the injection tube (3) is connected to the liquid pipeline (12) through a connecting pipe (4); A rotating shaft (5) is rotatably arranged in the inner cavity of the spray barrel (3), and a plurality of spiral blades (6) are fixedly arranged on the rotating shaft (5).

2. An efficient SNCR denitration device according to claim 1, characterized in that: The injection tube (3) is arranged at the upper part of the inner cavity of the boiler body (1) through a mounting rod (7).

3. An efficient SNCR denitration device according to claim 2, characterized in that: The spraying cylinder (3) comprises: A water tank (31), one side of which is fixedly connected to the connecting pipe (4); The atomizing spray plate (32) is fixedly arranged on the upper and lower sides of the water tank (31), and a plurality of spray holes (33) are provided on the atomizing spray plate (32). The rotating shaft (5) is rotatably arranged between the two atomizing spray plates (32).

4. An efficient SNCR denitration device according to claim 1, characterized in that: A heating plate (8) is arranged inside the boiler body (1), and a controller (9) is arranged outside the boiler body (1), and the controller (9) is electrically connected to the heating plate (8).

5. An efficient SNCR denitration device according to claim 1 or 4, characterized in that: A water outlet pipe (13) is fixedly arranged on one side of the lower part of the boiler body (1).

6. An efficient SNCR denitration device according to claim 5, characterized in that: A guide plate (14) is provided at the bottom of the inner cavity of the boiler body (1), and the guide plate (14) is arranged in an inclined structure.

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