Cement sncri precise denitration spray gun

Abstract

The utility model provides a kind of cement SNCR precision denitration spray gun, it is related to denitration spray gun field, including main unit, including spray gun body, support frame being fixedly connected to the surface of spray gun body, setting in the surface protection pipe of spray gun body, the upper end and lower end of the back of protection pipe are extended to the inner cavity of support frame and with its inner cavity movable connection, fixedly connected in the protection cover of the front of protection pipe;The utility model spray gun body is responsible for the atomization of denitration agent and is sprayed into flue, and chemical reaction occurs with nitrogen oxide in flue gas, so as to reach the purpose of denitration, protection pipe and protection cover cooperate, protect spray gun body from high-temperature flue gas direct scouring and corrosion, enhance the protection performance of spray gun, improve the reliability and durability of spray gun, the meshing transmission of gear and rack, realize the telescopic adjustment of protection pipe, to change the coverage of protection pipe, to meet the use requirement under different working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of denitrification spray guns, specifically a cement SNCR precision denitrification spray gun. Background Technology

[0002] SNCR denitrification refers to selective non-catalytic reduction denitrification technology. As a key area for nitrogen oxide emissions, the cement industry has made SNCR technology one of the mainstream denitrification methods due to its advantages of low investment cost and short transformation cycle. By injecting a reducing agent into high-temperature flue gas, a selective reduction reaction occurs under catalyst-free conditions, converting nitrogen oxides into nitrogen and water. The spray gun, as the atomizing injection device of the reducing agent, needs to precisely control the spray angle, speed and atomization particle size to ensure that the reducing agent is fully mixed and reacts with the flue gas.

[0003] Injection accuracy is one of the core indicators of SNCR denitrification technology, which directly affects denitrification efficiency, ammonia slip rate and system operating costs. The spray gun is usually set at the outlet of the decomposition furnace or cyclone and arranged in layers along the flue gas flow direction. Since the flue is a high-temperature, high-pressure and high-particulate environment, the high-speed movement of particles can easily cause severe wear on the windward side of the spray gun. This will not only reduce the service life of the spray gun, but the continuous scouring of the nozzle outlet by high-speed particles will cause the orifice to enlarge and the nozzle edge to wear, thereby causing the spray angle of the spray gun to deviate and the mist coverage area to deviate from the expected area.

[0004] In summary, this utility model provides a cement SNCR precision denitrification spray gun to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A cement SNCR precision denitrification spray gun, comprising,

[0007] The main unit includes a spray gun body, a support frame fixedly connected to the surface of the spray gun body, a protective tube disposed on the surface of the spray gun body, the upper and lower ends of the back of the protective tube extending into the inner cavity of the support frame and movably connected to the inner cavity therewith, a protective cover fixedly connected to the front of the protective tube, and a limiting component disposed on the surface of the support frame.

[0008] The adjustment unit includes a protective shell fixedly connected to the top of the support frame, a gear disposed in the inner cavity of the protective shell, a rack fixedly connected to the top of the protective tube, the rear end of the rack extending through a through groove at the bottom of the protective shell into the inner cavity of the protective shell and meshing with the gear, a rotating column fixedly connected to the inner cavity of the gear, a fixed plate disposed on the left side of the spray gun body, a positioning component disposed on the left side of the fixed plate, and a reset component disposed between the fixed plate and the positioning component.

[0009] Furthermore, in this utility model, the limiting component includes limiting grooves formed on both sides of the support frame, and limiting strips fixedly connected to both sides of the protective tube. The rear end of the limiting strip extends into the inner cavity of the limiting groove and is movably connected to its inner cavity.

[0010] Furthermore, in this utility model, both ends of the rotating column are movably connected to the inner wall of the protective shell through bearings, and the left end of the rotating column penetrates the protective shell and the fixed plate and is movably connected to the inner cavity of the fixed plate through bearings.

[0011] Furthermore, in this utility model, the positioning component includes a positioning piece fixedly connected to the surface of the rotating column, a fixing piece disposed on the back of the positioning piece, and a positioning post fixedly connected to the left front end and rear end of the fixing piece. One end of the positioning post extends into a positioning hole opened on the surface of the positioning piece and engages with the inner cavity of the positioning hole.

[0012] Furthermore, in this utility model, the reset assembly includes a fixing post fixedly connected to the right side of the fixing plate, a limiting post fixedly connected to the left side of the fixing plate, the left side of the limiting post extending into the inner cavity of the fixing post and slidingly connected to its inner cavity, and a stainless steel spring fixedly connected to the left side of the limiting post, the left end of the stainless steel spring being fixedly connected to the inner wall of the fixing post.

[0013] Beneficial effects: This utility model has the following beneficial effects:

[0014] The spray gun body of this utility model is responsible for atomizing the denitrification agent and spraying it into the flue, where it reacts chemically with nitrogen oxides in the flue gas to achieve the purpose of denitrification. The protective tube and protective cover work together to protect the spray gun body from the direct scouring and corrosion of high-temperature flue gas, enhancing the protective performance of the spray gun and improving its reliability and durability. The meshing transmission of gears and racks enables the extension and retraction adjustment of the protective tube, thereby changing the coverage range of the protective tube to meet the usage requirements under different working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the support frame and protective tube in their separated states according to this utility model;

[0017] Figure 3 This is a schematic diagram of the separated structure of the fixing plate, fixing post and limiting post of this utility model;

[0018] Figure 4 This is a side view cross-sectional structural diagram of the protective shell of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure of the rotating column, fixed plate, and positioning component of this utility model.

[0020] In the picture:

[0021] 1. Main Unit; 101. Spray Gun Body; 102. Support Frame; 103. Protective Tube; 104. Protective Cover; 105. Limiting Component; 1051. Limiting Groove; 1052. Limiting Strip; 2. Adjustment Unit; 201. Protective Shell; 202. Gear; 203. Rack; 204. Rotating Column; 205. Fixed Plate; 206. Positioning Component; 2061. Positioning Plate; 2062. Fixed Plate; 2063. Positioning Column; 207. Reset Component; 2071. Fixed Column; 2072. Limiting Column; 2073. Stainless Steel Spring. Detailed Implementation

[0022] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0023] Example 1

[0024] like Figure 1-5 The image shown is the first embodiment of this utility model, which provides a cement SNCR precision denitrification spray gun, comprising:

[0025] The main unit 1 includes a spray gun body 101, a support frame 102 fixedly connected to the surface of the spray gun body 101, a protective tube 103 disposed on the surface of the spray gun body 101, the upper and lower ends of the back of the protective tube 103 extending into the inner cavity of the support frame 102 and movably connected to the inner cavity therewith, a protective cover 104 fixedly connected to the front of the protective tube 103, and a limiting component 105 disposed on the surface of the support frame 102.

[0026] The adjustment unit 2 includes a protective shell 201 fixedly connected to the top of the support frame 102, a gear 202 disposed in the inner cavity of the protective shell 201, a rack 203 fixedly connected to the top of the protective tube 103, the rear end of the rack 203 extending through a through groove at the bottom of the protective shell 201 to the inner cavity of the protective shell 201 and meshing with the gear 202, a rotating column 204 fixedly connected to the inner cavity of the gear 202, a fixed plate 205 disposed on the left side of the spray gun body 101, a positioning component 206 disposed on the left side of the fixed plate 205, and a reset component 207 disposed between the fixed plate 205 and the positioning component 206.

[0027] like Figure 1-5 As shown, the spray gun body 101 is responsible for atomizing the denitrification agent and spraying it into the flue, where it reacts chemically with nitrogen oxides in the flue gas to achieve denitrification. The support frame 102 provides stable support for the protective tube 103. The protective tube 103 and the protective cover 104 cooperate to protect the spray gun body 101 from direct scouring and corrosion by high-temperature flue gas, enhancing the protective performance of the spray gun and improving its reliability and durability. The limiting component 105 limits the movement angle of the protective tube 103 within the support frame 102 to prevent its position from shifting. The protective shell 201 provides protection for the gear 202 and rack 203, preventing them from being interfered with and damaged by the external environment. The meshing of the gear 202 and rack 203... The transmission mechanism enables the extension and retraction adjustment of the protective tube 103, thereby changing the coverage area of ​​the protective tube 103 to meet the usage requirements under different working conditions. The rotating column 204 serves as a connection and transmission mechanism. The fixed plate 205 provides an installation base for the positioning component 206 and the reset component 207. The fixed plate 205 is fixed outside the denitrification area. The length of the rotating column 204 is not fixed and is determined by the position of the fixed plate 205. The positioning component 206 and the reset component 207 cooperate to prevent the rotating column 204 from rotating on its own. All components except the spray gun body 101 are made of Inconel 625 nickel-based high-temperature alloy, which has excellent high-temperature oxidation resistance and can be used normally at high temperatures.

[0028] Example 2

[0029] Reference Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0030] In this embodiment, the limiting component 105 includes limiting grooves 1051 formed on both sides of the support frame 102, and limiting strips 1052 fixedly connected to both sides of the protective tube 103. The rear end of the limiting strip 1052 extends into the inner cavity of the limiting groove 1051 and is movably connected to its inner cavity.

[0031] Both ends of the rotating column 204 are movably connected to the inner wall of the protective shell 201 through bearings. The left end of the rotating column 204 passes through the protective shell 201 and the fixed plate 205 and is movably connected to the inner cavity of the fixed plate 205 through bearings.

[0032] like Figure 2 As shown, the limiting groove 1051 and the limiting strip 1052 cooperate to limit the movement angle of the protective tube 103 and prevent its angle from deflecting. The rotating column 204 facilitates the adjustment of the position of the protective tube 103 by the staff outside the denitrification area, providing convenience for its operation.

[0033] Example 3

[0034] Reference Figure 2 and 5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0035] In this embodiment, the positioning component 206 includes a positioning piece 2061 fixedly connected to the surface of the rotating column 204, a fixing piece 2062 disposed on the back of the positioning piece 2061, and a positioning column 2063 fixedly connected to the left front end and rear end of the fixing piece 2062. One end of the positioning column 2063 extends into the positioning hole opened on the surface of the positioning piece 2061 and engages with the inner cavity of the positioning hole.

[0036] The reset assembly 207 includes a fixed post 2071 fixedly connected to the right side of the fixed plate 2062, a limiting post 2072 fixedly connected to the left side of the fixed plate 205, the left side of the limiting post 2072 extending into the inner cavity of the fixed post 2071 and slidingly connected to its inner cavity, and a stainless steel spring 2073 fixedly connected to the left side of the limiting post 2072, the left end of the stainless steel spring 2073 being fixedly connected to the inner wall of the fixed post 2071.

[0037] like Figure 2 and 5 As shown, the positioning piece 2061, the fixing piece 2062, and the positioning post 2063 cooperate to position and fix the rotating post 204. When the positioning post 2063 is engaged in the positioning hole, the rotating post 204 is locked in a specific position, thereby fixing the position of the protective tube 103. This effectively prevents the protective tube 103 from moving due to vibration or external force during use. Through the elastic action of the stainless steel spring 2073, the positioning component 206 is automatically reset. When it is necessary to adjust the extension and retraction state of the protective tube 103, the spring force can be overcome to move the positioning post 2063 out of the positioning hole. After the adjustment is completed, the spring will push the positioning component 206 to reset, so that the positioning post 2063 is re-engaged in the positioning hole, ensuring the stability and reliability of the positioning component 206.

[0038] During use, the protective tube 103 and the protective cover 104 work together to shield high-speed particles from direct impact on the nozzle of the spray gun body 101. The position of the protective cover 104 can be adjusted according to the spraying speed of the spray gun body 101. During adjustment, first press the fixing plate 2062 backward, causing it to move the positioning post 2063 out of the positioning hole on the surface of the positioning plate 2061. At this time, the fixing plate 2062 can push the fixing post 2071 to move to the right on the surface of the limiting post 2072. The stainless steel spring 2073 will deform under pressure, rotating the post 2071. 4. Once the positioning effect disappears, rotate the rotating column 204. The rotating column 204 can drive the gear 202 to rotate. Since the gear 202 meshes with the rack 203, the gear 202 can adjust the position of the protective tube 103 and the protective cover 104 in conjunction with the rack 203 when rotating. After the adjustment is completed, stop rotating the rotating column 204 and loosen the fixing plate 2062. At this time, under the action of the return elastic force of the stainless steel spring 2073, the fixing column 2071 drives the fixing plate 2062 to reset. The fixing plate 2062 drives the positioning column 2063 to re-insert into the inner cavity of the positioning hole and engage with its inner cavity, so that the rotating column 204 can be repositioned.

[0039] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A cement SNCR precision denitrification spray gun, characterized in that: include, The main unit (1) includes a spray gun body (101), a support frame (102) fixedly connected to the surface of the spray gun body (101), a protective tube (103) disposed on the surface of the spray gun body (101), the upper and lower ends of the back of the protective tube (103) extending into the inner cavity of the support frame (102) and movably connected to the inner cavity of the support frame (102), a protective cover (104) fixedly connected to the front of the protective tube (103), and a limiting component (105) disposed on the surface of the support frame (102). The adjustment unit (2) includes a protective shell (201) fixedly connected to the top of the support frame (102), a gear (202) disposed in the inner cavity of the protective shell (201), a rack (203) fixedly connected to the top of the protective tube (103), the rear end of the rack (203) extending through the through groove at the bottom of the protective shell (201) to the inner cavity of the protective shell (201) and meshing with the gear (202), a rotating column (204) fixedly connected to the inner cavity of the gear (202), a fixed plate (205) disposed on the left side of the spray gun body (101), a positioning component (206) disposed on the left side of the fixed plate (205), and a reset component (207) disposed between the fixed plate (205) and the positioning component (206).

2. The cement SNCR precision denitrification spray gun as described in claim 1, characterized in that: The limiting component (105) includes limiting grooves (1051) opened on both sides of the support frame (102) and limiting strips (1052) fixedly connected to both sides of the protective tube (103). The rear end of the limiting strip (1052) extends into the inner cavity of the limiting groove (1051) and is movably connected to its inner cavity.

3. The cement SNCR precision denitrification spray gun as described in claim 1, characterized in that: Both ends of the rotating column (204) are movably connected to the inner wall of the protective shell (201) through bearings. The left end of the rotating column (204) passes through the protective shell (201) and the fixed plate (205) and is movably connected to the inner cavity of the fixed plate (205) through bearings.

4. The cement SNCR precision denitrification spray gun as described in claim 1, characterized in that: The positioning component (206) includes a positioning piece (2061) fixedly connected to the surface of the rotating column (204), a fixing piece (2062) disposed on the back of the positioning piece (2061), and a positioning post (2063) fixedly connected to the left front end and rear end of the fixing piece (2062). One end of the positioning post (2063) extends into the positioning hole opened on the surface of the positioning piece (2061) and engages with the inner cavity of the positioning hole.

5. The cement SNCR precision denitrification spray gun as described in claim 1, characterized in that: The reset assembly (207) includes a fixed post (2071) fixedly connected to the right side of the fixed plate (2062), a limiting post (2072) fixedly connected to the left side of the fixed plate (205), the left side of the limiting post (2072) extending into the inner cavity of the fixed post (2071) and slidingly connected to its inner cavity, and a stainless steel spring (2073) fixedly connected to the left side of the limiting post (2072), the left end of the stainless steel spring (2073) being fixedly connected to the inner wall of the fixed post (2071).

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