A telescopic lance for SNCR denitration

Abstract

This utility model relates to the field of SNCR denitrification spray gun technology, specifically to a telescopic spray gun for SNCR denitrification, including a spray gun housing and a telescopic assembly. The telescopic assembly includes a denitrification component, a mixing component, a gun rod, a telescopic rod, a sliding component, a nozzle, a cylinder, a mounting rod, and a mounting flange. When telescopic movement is required, the output end of the cylinder drives the mounting rod to move, and the movement of the mounting rod drives the nozzle to move. Since the inlet of the nozzle is fixedly connected to the telescopic rod, the movement of the nozzle drives the telescopic rod to move. The other end of the telescopic rod is restricted to sliding within the gun rod by the sliding component and remains connected. The spray gun is then installed on the mounting flange, and the air flows through the gun rod and the telescopic rod before finally being sprayed out from the nozzle. This solution solves the problem of low mixing efficiency of the reducing agent and flue gas in existing SNCR denitrification spray guns due to the different sizes and specifications of boilers.

Description

Technical Field

[0001] This utility model relates to the field of SNCR denitrification spray gun technology, and in particular to a telescopic spray gun for SNCR denitrification. Background Technology

[0002] Selective Non-Catalytic Reduction (SNCR) technology is widely used in flue gas denitrification due to its advantages such as low cost and no secondary pollution. The spray gun is a key piece of equipment in an SNCR denitrification system, and its performance directly affects the denitrification efficiency. In existing SNCR denitrification systems, the reducing agent and compressed air are mixed inside the spray gun and then injected into the decomposition furnace for the denitrification reaction. Since the reducing agent is generally a solution of pure ammonia, ammonia water, or urea, the liquid reducing agent and compressed air are not easily mixed uniformly, resulting in low denitrification efficiency.

[0003] The prior art (CN203155072U) discloses an SNCR denitrification spray gun containing a spray gun housing, a compressed air inlet pipe at the rear end of the spray gun housing, a reducing agent inlet pipe on the rear side wall of the spray gun housing, and a spiral channel, a collecting hood, and a gun rod arranged sequentially from the rear end to the front end inside the spray gun housing. The spiral channel is located at the front end of the reducing agent inlet pipe, and a nozzle is provided at the front end of the gun rod. This SNCR denitrification spray gun has high denitrification efficiency.

[0004] However, after the SNCR denitrification spray gun of the above scheme is installed on the boiler through the flange, it can only be injected at one point. Due to the different sizes and specifications of the boilers, the mixing efficiency of the reducing agent and flue gas is relatively low. Utility Model Content

[0005] The purpose of this invention is to provide a telescopic spray gun for SNCR denitrification, which aims to solve the problem that existing SNCR denitrification spray guns, after being installed on the boiler via a flange, can only spray at one point, resulting in low mixing efficiency of the reducing agent and flue gas due to the different sizes and specifications of the boilers.

[0006] To achieve the above objectives, this utility model provides a telescopic spray gun for SNCR denitrification, including a spray gun housing and a telescopic assembly. The telescopic assembly includes a denitrification component, a mixing component, a gun barrel, a telescopic rod, a sliding component, a nozzle, a cylinder, a mounting rod, and a mounting flange. The denitrification component is disposed on one side of the spray gun housing, the gun rod is disposed on one side of the denitrification component, the mixing component is disposed on one side of the spray gun housing, the telescopic rod is slidably connected to and communicates with the gun rod and is located on one side of the gun rod, the sliding member is fixedly connected to the telescopic rod and is located on one side of the telescopic rod, the nozzle is fixedly connected to the telescopic rod and is located on one side of the telescopic rod, the cylinder is disposed on one side of the mixing component, the mounting rod is fixedly connected to the output end of the cylinder and is located on one side of the cylinder, and the mounting flange is fixedly connected to the mounting rod and is located on one side of the mounting rod.

[0007] The denitrification component includes a compressed air inlet pipe and a reducing agent inlet pipe. The compressed air inlet pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The reducing agent inlet pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing.

[0008] The mixing component includes a spiral channel, a collecting hood, and a mixing section. The spiral channel is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The collecting hood is fixedly connected to the spray gun housing and is located on one side of the spray gun housing.

[0009] The mixing section includes a sealing filler and a filler baffle. The sealing filler is fixedly connected to the spray gun housing and located on one side of the gun rod. The filler baffle is fixedly connected to the gun rod and the spray gun housing, and located on one side of the gun rod.

[0010] The telescopic assembly includes a cooling pipe, a water inlet, and a water outlet. The cooling pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The water inlet is fixedly connected to the cooling pipe and is located on one side of the cooling pipe. The water outlet is fixedly connected to the cooling pipe and is located on one side of the cooling pipe.

[0011] This invention relates to a telescopic spray gun for SNCR denitrification. When telescopic movement is required, the output end of the cylinder drives the mounting rod to move, which in turn moves the nozzle. Since the inlet of the nozzle is fixedly connected to the telescopic rod, the movement of the nozzle drives the telescopic rod to move as well. The other end of the telescopic rod is restricted to sliding within the gun rod by a sliding member while maintaining communication. The spray gun is then installed on the mounting flange, and air and reducing agent are injected through the denitrification component. Subsequently, the mixing component mixes and injects the mixture into the gun rod, which then flows through the telescopic rod and finally exits from the nozzle. This solution solves the problem that in existing SNCR denitrification spray guns, after being installed on the boiler via a flange, the spray can only be applied at one point, resulting in low mixing efficiency of the reducing agent and flue gas due to the varying sizes and specifications of boilers. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a structural schematic diagram of the entire utility model from another perspective.

[0015] Figure 3 This is a side view of the entire utility model.

[0016] Figure 4 This is a cross-sectional view of the entire utility model.

[0017] 101-Spray gun housing, 102-Telescopic assembly, 103-Denitrification component, 104-Mixing component, 105-Gun rod, 106-Telescopic rod, 107-Sliding component, 108-Nozzle, 109-Cylinder, 110-Mounting rod, 111-Mounting flange, 112-Compressed air inlet pipe, 113-Reducing agent inlet pipe, 114-Spiral channel, 115-Collecting hood, 116-Mixing section, 117-Sealing packing, 118-Packing baffle, 119-Cooling pipe, 120-Water inlet, 121-Water outlet. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as... This is to be understood as a limitation of the present invention.

[0019] Please see Figures 1-4 ,in, Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a structural schematic diagram of the entire utility model from another perspective. Figure 3 This is a side view of the entire utility model. Figure 4 This is a cross-sectional view of the entire utility model.

[0020] This utility model provides a telescopic spray gun for SNCR denitrification, comprising a spray gun housing 101 and a telescopic assembly 102. The telescopic assembly 102 includes a denitrification component 103, a mixing component 104, a gun rod 105, a telescopic rod 106, a sliding component 107, a nozzle 108, a cylinder 109, a mounting rod 110, a mounting flange 111, a cooling pipe 119, a water inlet 120, and a water outlet 121. The denitrification component 103 includes a compressed air inlet pipe 112 and a reducing agent inlet pipe 113. The mixing component 104 includes a spiral channel 114, a collecting hood 115, and a mixing section 116. The mixing section 116 includes a sealing packing 117 and a packing baffle 118. The aforementioned solution solves the problem that in existing SNCR denitrification spray guns, after the SNCR denitrification spray gun is installed on the boiler via a flange, it can only spray at one point. Due to the different sizes and specifications of boilers, the mixing efficiency of the reducing agent and flue gas is relatively low.

[0021] In this specific embodiment, the denitrification component 103 is disposed on one side of the spray gun housing 101, the gun rod 105 is disposed on one side of the denitrification component 103, the mixing component 104 is disposed on one side of the spray gun housing 101, the telescopic rod 106 is slidably connected to and communicates with the gun rod 105 and is located on one side of the gun rod 105, the sliding member 107 is fixedly connected to the telescopic rod 106 and is located on one side of the telescopic rod 106, the nozzle 108 is fixedly connected to the telescopic rod 106 and is located on one side of the telescopic rod 106, the cylinder 109 is disposed on one side of the mixing component 104, the mounting rod 110 is fixedly connected to the output end of the cylinder 109 and is located on one side of the cylinder 109, and the mounting flange 111 is fixedly connected to the mounting rod 110 and is located on one side of the mounting rod 110. When telescopic movement is required, the output end of the cylinder 109 drives the mounting rod 110. The movement of the mounting rod 110 causes the nozzle 108 to move. Since the inlet of the nozzle 108 is fixedly connected to the telescopic rod 106, the movement of the nozzle 108 causes the telescopic rod 106 to move. The other end of the telescopic rod 106 is restricted by the sliding member 107 to slide within the gun rod 105 and remain connected. The spray gun is then installed on the mounting flange 111. Air and reducing agent are injected through the denitrification component 103. Subsequently, the mixing component 104 mixes and injects the mixture into the gun rod 105. The mixture then flows through the gun rod 105 and the telescopic rod 106 before finally being sprayed out from the nozzle 108. This solution solves the problem that in existing SNCR denitrification spray guns, after being installed on the boiler through the flange, the SNCR denitrification spray gun can only spray at one point. Due to the different sizes and specifications of boilers, the mixing efficiency of the reducing agent and flue gas is relatively low.

[0022] The compressed air inlet pipe 112 is fixedly connected to the spray gun housing 101 and located on one side of the spray gun housing 101. The reducing agent inlet pipe 113 is fixedly connected to the spray gun housing 101 and located on one side of the spray gun housing 101. The compressed air inlet pipe 112 can circulate air, and the reducing agent inlet pipe 113 can circulate reducing agent. The air and reducing agent are injected into the spray gun housing 101, mixed by the mixing component 104, and finally sprayed out through the nozzle 108 for denitrification.

[0023] Secondly, the spiral channel 114 is fixedly connected to the spray gun housing 101 and located on one side of the spray gun housing 101. The collecting shroud 115 is fixedly connected to the spray gun housing 101 and located on one side of the spray gun housing 101. After the air and reducing agent are injected, the mixing time is increased by the spiral channel 114, and its inherent flow state is changed, so that the gas-liquid two-phase mixture is fully and uniformly mixed. Then, the gas-liquid two-phase mixture is uniformly collected by the collecting shroud 115 at the rear end of the gun rod 105 and enters the gun rod 105 fixed by the mixing part 116.

[0024] In addition, the sealing filler 117 is fixedly connected to the spray gun housing 101 and is fixedly connected to the gun rod 105, and is located on one side of the gun rod 105. The filler baffle 118 is fixedly connected to the gun rod 105 and the spray gun housing 101, and is located on one side of the gun rod 105. The filler baffle 118 serves as a seal, and the high-temperature resistant and corrosion-resistant sealing filler 117 is filled inside the filler baffle 118 to ensure that the mixture can only be sprayed out through the gun rod 105.

[0025] The cooling pipe 119 is fixedly connected to the spray gun housing 101 and located on one side of the spray gun housing 101. The water inlet 120 is fixedly connected to the cooling pipe 119 and located on one side of the cooling pipe 119. The water outlet 121 is fixedly connected to the cooling pipe 119 and located on one side of the cooling pipe 119. At the end where the mixing in the spiral channel 114 ends, the coolant is injected into the cooling pipe 119 from the water inlet 120 through the water inlet pipe. The cooling pipe 119 is fixed to the surface of the spray gun housing 101. The coolant cools the spray gun housing 101 and then discharges it from the water outlet 121 for circulating cooling.

[0026] When using this utility model, when extension or retraction is required, the output end of the cylinder 109 drives the mounting rod 110 to move. The movement of the mounting rod 110 drives the nozzle 108 to move. Since the inlet of the nozzle 108 is fixedly connected to the telescopic rod 106, the movement of the nozzle 108 drives the telescopic rod 106 to move. The other end of the telescopic rod 106 is restricted by the sliding member 107 to slide within the gun rod 105 and remain connected. Then, the spray gun is installed on the mounting flange 111, and then... The compressed air inlet pipe 112 injects air, and the reducing agent inlet pipe 113 injects reducing agent. Then, the spiral channel 114 increases the mixing time to ensure successful mixing before injecting into the gun rod 105. The mixture then flows through the gun rod 105 to the telescopic rod 106 and finally exits from the nozzle 108. This solution solves the problem that in existing SNCR denitrification spray guns, after being installed on the boiler via a flange, the SNCR denitrification spray gun can only inject at one point. Due to the different sizes and specifications of boilers, the mixing efficiency of the reducing agent and flue gas is relatively low.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A telescopic spray gun for SNCR denitrification, comprising a spray gun housing, characterized in that, It also includes telescopic components; The telescopic assembly includes a denitrification component, a mixing component, a gun barrel, a telescopic rod, a sliding component, a nozzle, a cylinder, a mounting rod, and a mounting flange; The denitrification component is disposed on one side of the spray gun housing, the gun rod is disposed on one side of the denitrification component, the mixing component is disposed on one side of the spray gun housing, the telescopic rod is slidably connected to and communicates with the gun rod and is located on one side of the gun rod, the sliding member is fixedly connected to the telescopic rod and is located on one side of the telescopic rod, the nozzle is fixedly connected to the telescopic rod and is located on one side of the telescopic rod, the cylinder is disposed on one side of the mixing component, the mounting rod is fixedly connected to the output end of the cylinder and is located on one side of the cylinder, and the mounting flange is fixedly connected to the mounting rod and is located on one side of the mounting rod.

2. A telescopic spray gun for SNCR denitrification as described in claim 1, characterized in that, The denitrification component includes a compressed air inlet pipe and a reducing agent inlet pipe. The compressed air inlet pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The reducing agent inlet pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing.

3. A telescopic spray gun for SNCR denitrification as described in claim 2, characterized in that, The mixing component includes a spiral channel, a collecting hood, and a mixing section. The spiral channel is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The collecting hood is fixedly connected to the spray gun housing and is located on one side of the spray gun housing.

4. A telescopic spray gun for SNCR denitrification as described in claim 3, characterized in that, The mixing section includes a sealing filler and a filler baffle. The sealing filler is fixedly connected to the spray gun housing and located on one side of the gun rod. The filler baffle is fixedly connected to the gun rod and the spray gun housing, and located on one side of the gun rod.

5. A telescopic spray gun for SNCR denitrification as described in claim 1, characterized in that, The telescopic assembly includes a cooling pipe, a water inlet, and a water outlet. The cooling pipe is fixedly connected to the spray gun housing and is located on one side of the spray gun housing. The water inlet is fixedly connected to the cooling pipe and is located on one side of the cooling pipe. The water outlet is fixedly connected to the cooling pipe and is located on one side of the cooling pipe.

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