SNCR (selective non-catalytic reduction) denitration equipment for rotary kiln

Abstract

The utility model discloses rotary kiln SNCR (selective non-catalytic reduction) denitration equipment which comprises a smoke inlet pipe, the left end of the top of the smoke inlet pipe is fixedly sleeved with a connecting tool, the end, away from the smoke inlet pipe, of the connecting tool is movably sleeved with a kiln body, and the position, close to the bottom, of the outer surface of the smoke inlet pipe is fixedly connected with a supporting plate. A supporting plate is fixedly connected to the top of the supporting plate, water storage equipment is fixedly connected to the position, close to the middle, of the top of the supporting plate, liquid storage equipment is fixedly connected to the position, close to the outer side, of the top of the supporting plate, and output pipes communicate with the positions, close to the left side, of the tops of the liquid storage equipment and the water storage equipment. The left end of the output pipe communicates with a communicating pipe. According to the utility model, through the arrangement of the electric telescopic cylinder and the connecting ball pipe, the angle of the spray pipe can be adjusted, reduction spray can be in full contact with flue gas, and meanwhile, a reducing agent can be uniformly sprayed to each region of the flue gas in the rotary kiln, so that the denitration effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration equipment, in particular to a rotary kiln SNCR denitration equipment. Background Technique

[0002] A rotary kiln is a large rotating device, usually used for heating, drying or chemical reaction processes of solid materials. Its main structure is a long cylindrical metal tube, usually horizontally placed, which can rotate throughout its length. The inside of the rotary kiln is usually covered with high-temperature resistant refractory materials or special lining materials to resist high temperature and chemical corrosion.

[0003] At present, when the existing rotary kiln SNCR denitration equipment is in use, the spraying surface of the spray gun mostly has a certain angle with the flue gas incoming flow direction to enhance the mixing degree of the reducing agent spray and the flue gas. However, the flue gas incoming flow direction will change due to the change of the flue gas volume and the flow rate of the flue gas. Therefore, if the spray gun direction is directly fixed in a vertical state, it may lead to insufficient mixing of the reducing agent spray and the flue gas. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the flue gas incoming flow direction may change in the prior art, and the unstable flue gas incoming flow direction leads to insufficient mixing of the reducing agent spray and the flue gas, and a rotary kiln SNCR denitration equipment is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A rotary kiln SNCR denitration equipment, including a flue gas inlet pipe, the left end of the top of the flue gas inlet pipe is fixedly sleeved with a connecting tooling, the end of the connecting tooling far away from the flue gas inlet pipe is movably sleeved with a kiln body, the outer surface of the flue gas inlet pipe near the bottom is fixedly connected with a support plate, the top of the support plate is fixedly connected with a support tray, the top of the support tray near the middle is fixedly connected with a water storage device, the top of the support tray near the outside is fixedly connected with a liquid storage device, the top of the liquid storage device and the water storage device near the left side is communicated with an output pipe, the left end of the output pipe is communicated with a connecting pipe, the top of the connecting pipe is communicated with a connecting ring, and a spray pipe is arranged inside the connecting ring.

[0007] Preferably, a limiting block is movably sleeved on the outside of the connecting ring, the left side of the limiting block is fixedly connected with the connecting tooling, and the right side of the limiting block is fixedly connected with a fixing plate, and the inside of the fixing plate is fixedly connected with the flue gas inlet pipe.

[0008] Preferably, a delivery ball tube is fixedly connected to the position of the nozzle away from the center of the connection ring. A connection ball tube is fixedly connected to the middle of the nozzle. The nozzle is movably sleeved with the connection ring through the delivery ball tube, and the nozzle is movably sleeved with the smoke inlet tube through the connection ball tube.

[0009] Preferably, the inner side of the support plate is fixedly connected to the smoke inlet tube. A water inlet pipe is communicated with the top of the water storage device near the right side, and a liquid inlet pipe is communicated with the top of the liquid storage device near the right side.

[0010] Preferably, an electric telescopic cylinder is fixedly connected to the side of the fixing plate close to the connection tooling. The electric telescopic cylinders are evenly distributed at equal intervals in a circular array on the fixing plate, and the left side of the electric telescopic cylinder is fixedly connected to the connection ring.

[0011] Preferably, a spray port is opened at the bottom of the nozzle, and a spray port is also opened on the left side of the nozzle on the side of the connection ball tube close to the center of the connection ring.

[0012] Compared with the prior art, the present utility model provides a rotary kiln SNCR denitration device, which has the following beneficial effects:

[0013] 1. For this rotary kiln SNCR denitration device, by providing the electric telescopic cylinder and the connection ball tube, the angle of the nozzle can be adjusted, so that the reduction spray can be fully contacted with the flue gas, and at the same time, it can ensure that the reducing agent can be evenly sprayed into each area of the flue gas inside the rotary kiln, thereby improving the denitration effect. The flow of the flue gas inside the rotary kiln is complex, and the temperature and gas flow velocity in different areas may be different. Adjusting the angle of the nozzle can ensure that the reducing agent can reach the areas where denitration reaction needs to be carried out, and avoid the situation that NOx in some areas is not effectively degraded due to improper spraying direction.

[0014] 2. For this rotary kiln SNCR denitration device, by providing the limit block and the delivery ball tube, the limit block can limit the connection ring and ensure the stability of the connection ring during operation. The delivery ball tube is used to adapt to the electric telescopic cylinder to drive the connection ring to be adjusted, ensuring that the reducing agent in the connection ring can stably enter the nozzle, which is beneficial to ensuring the stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a rotary kiln SNCR denitration device proposed by the present utility model;

[0016] Figure 2 is a schematic diagram of the connecting pipe of a rotary kiln SNCR denitration device proposed by the present utility model;

[0017] Figure 3 is a schematic diagram of the limit block of a rotary kiln SNCR denitration device proposed by the present utility model;

[0018] Figure 4 Schematic diagram of the connecting ring of a rotary kiln SNCR denitration device proposed by the present utility model;

[0019] Figure 5 Schematic diagram of the connecting ball tube of a rotary kiln SNCR denitration device proposed by the present utility model.

[0020] In the figure: 1, flue gas inlet pipe; 2, kiln body; 3, supporting plate; 4, support plate; 5, liquid storage device; 6, liquid inlet pipe; 7, water inlet pipe; 8, output pipe; 9, connecting pipe; 10, fixing plate; 11, connecting tooling; 12, limit block; 13, electric telescopic cylinder; 14, connecting ring; 15, water storage device; 16, spray pipe; 17, conveying ball tube; 18, connecting ball tube; 19, spray nozzle. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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 should not be construed as a limitation of the present utility model.

[0023] Referring to Figures 1-5 , a rotary kiln SNCR denitration device includes a flue gas inlet pipe 1. The left end of the top of the flue gas inlet pipe 1 is fixedly sleeved with a connecting tooling 11. One end of the connecting tooling 11 away from the flue gas inlet pipe 1 is movably sleeved with a kiln body 2. A support plate 4 is fixedly connected to the outer surface of the flue gas inlet pipe 1 near the bottom. A supporting plate 3 is fixedly connected to the top of the support plate 4. The inner side of the supporting plate 3 is fixedly connected to the flue gas inlet pipe 1. A water inlet pipe 7 is communicated with the top of the water storage device 15 near the right side. A liquid inlet pipe 6 is communicated with the top of the liquid storage device 5 near the right side. A water storage device 15 is fixedly connected to the top of the supporting plate 3 near the middle. A liquid storage device 5 is fixedly connected to the top of the supporting plate 3 near the outer side. An output pipe 8 is communicated with the top of the liquid storage device 5 and the water storage device 15 near the left side. The left end of the output pipe 8 is communicated with a connecting pipe 9. The top of the connecting pipe 9 is communicated with a connecting ring 14. A spray pipe 16 is arranged inside the connecting ring 14. A spray nozzle 19 is opened at the bottom of the spray pipe 16. A spray nozzle 19 is also opened on the left side of the spray pipe 16 at a position near the center of the connecting ball tube 18 on the side close to the connecting ring 14.

[0024] Referring to Figures 1-5 As described above, a limit block 12 is movably sleeved outside the connecting ring 14. The limit block 12 is provided to limit the position of the connecting ring 14 to ensure the stability of the movement of the connecting ring 14. The left side of the limit block 12 is fixedly connected to the connecting tooling 11, and the right side of the limit block 12 is fixedly connected to a fixing plate 10. A power telescopic cylinder 13 is fixedly connected to the side of the fixing plate 10 close to the connecting tooling 11. The design of multiple power telescopic cylinders 13 is also to ensure the stability of the operation of the connecting ring 14. At the same time, multiple power telescopic cylinders 13 are uniformly controlled by the industrial control equipment in the overall equipment system to ensure that multiple power telescopic cylinders 13 can be adjusted identically to ensure stability. The left side of the power telescopic cylinder 13 is fixedly connected to the connecting ring 14, and the inner side of the fixing plate 10 is fixedly connected to the smoke inlet pipe 1. A conveying ball pipe 17 is fixedly connected to the position of the spray pipe 16 far from the center of the connecting ring 14, and a connecting ball pipe 18 is fixedly connected to the middle of the spray pipe 16. The provision of the conveying ball pipe 17 and the connecting ball pipe 18 can conveniently adjust the orientation of the spray pipe 16 under the condition of ensuring the stability of the overall equipment, making the most of the reducing agent and reducing the operating cost at the same time. The spray pipe 16 is movably sleeved with the connecting ring 14 through the conveying ball pipe 17, and the spray pipe 16 is movably sleeved with the smoke inlet pipe 1 through the connecting ball pipe 18.

[0025] In the present utility model, during use, the liquid inlet pipe 6 and the water inlet pipe 7 can be used to convey the denitration agent and water to the liquid storage device 5 and the water storage device 15, and then conveyed to the connecting pipe 9 through the output pipe 8, then conveyed to the connecting ring 14 through the connecting pipe 9, then conveyed to the conveying ball pipe 17 and the spray pipe 16 through the connecting ring 14, and then the flue gas is conveyed through the smoke inlet pipe 1. Then, according to the amount and flow rate of the flue gas conveyed by the user, the power telescopic cylinder 13 is controlled to adjust the position of the connecting ring 14. Then, the connecting ring 14 is pushed by the power telescopic cylinder 13, so that the connecting ring 14 drives the positions of the conveying ball pipe 17 and the spray pipe 16 to be adjusted, and at the same time drives the connecting ball pipe 18 to rotate on the smoke inlet pipe 1. In this way, the orientation of the spray port 19 is adjusted to adapt to the incoming flow direction of the flue gas and ensure full contact between the reducing agent and the flue gas.

[0026] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A rotary kiln SNCR denitrification device, comprising a smoke inlet pipe (1), characterized in that: The top left end of the smoke inlet pipe (1) is fixedly sleeved with a connecting fixture (11), and the end of the connecting fixture (11) away from the smoke inlet pipe (1) is movably sleeved with a kiln body (2). The outer surface of the smoke inlet pipe (1) is fixedly connected to a support plate (4) near the bottom, and the top of the support plate (4) is fixedly connected to a support plate (3). The top of the support plate (3) is fixedly connected to a water storage device (15) near the middle, and the top of the support plate (3) is fixedly connected to a liquid storage device (5) near the outside. The tops of the liquid storage device (5) and the water storage device (15) are connected to an output pipe (8) near the left side, and the left end of the output pipe (8) is connected to a connecting pipe (9). The top of the connecting pipe (9) is connected to a connecting ring (14), and a nozzle (16) is provided on the inner side of the connecting ring (14).

2. A rotary kiln SNCR denitration equipment according to claim 1, characterized in that: The outer side of the connecting ring (14) is movably sleeved with a limit block (12), the left side of the limit block (12) is fixedly connected to a connecting tool (11), the right side of the limit block (12) is fixedly connected to a fixing plate (10), and the inner side of the fixing plate (10) is fixedly connected to the smoke inlet pipe (1).

3. The rotary kiln SNCR denitration equipment according to claim 1, characterized in that: The nozzle (16) is fixedly connected to a delivery ball tube (17) at a position away from the center of the connecting ring (14); the middle of the nozzle (16) is fixedly connected to a connecting ball tube (18); the nozzle (16) is movably connected to the connecting ring (14) via the delivery ball tube (17); and the nozzle (16) is movably connected to the smoke inlet pipe (1) via the connecting ball tube (18).

4. The rotary kiln SNCR denitration equipment according to claim 1, characterized in that: The inner side of the support plate (3) is fixedly connected to the smoke inlet pipe (1), the top of the water storage device (15) near the right side is connected to a water inlet pipe (7), and the top of the liquid storage device (5) near the right side is connected to a liquid inlet pipe (6).

5. The rotary kiln SNCR denitration equipment according to claim 2, characterized in that: An electric telescopic cylinder (13) is fixedly connected to one side of the fixing plate (10) close to the connecting tool (11), and the left side of the electric telescopic cylinder (13) is fixedly connected to a connecting ring (14).

6. The rotary kiln SNCR denitration equipment according to claim 1, characterized in that: The bottom of the nozzle (16) is provided with a nozzle opening (19), and the left side of the nozzle (16) located at the side of the connecting ball tube (18) close to the center of the connecting ring (14) is also provided with a nozzle opening (19).

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