An SCR catalyst reactor device

Abstract

This invention provides an SCR catalyst reactor device, relating to the field of SCR catalyst reactors, including an SCR reactor comprising a reaction tower, a mixer for mixing flue gas and ammonia, a connecting pipe for flue gas inlet, a catalyst layer for flue gas treatment, a rectifier and ammonia injection grid, a guide plate for flue gas flow guidance, and a soot blower for soot blowing of the catalyst layer, and a separation component including a separation tank for separating particulate matter from flue gas; this invention utilizes the separation tank in the separation component, which includes a cylinder, a cone, a hopper, a spiral exhaust pipe, an inner pipe, and a spiral intake pipe, to achieve efficient gas-solid separation. The fan in the pressurization component, driven by a first motor, extracts flue gas from the reaction tower outlet through an extraction pipe and sends it into the separation tank through a guide pipe, enhancing the flow dynamics of the flue gas.

Description

Technical Field

[0001] This utility model belongs to the field of SCR catalyst reactors, specifically an SCR catalyst reactor device. Background Technology

[0002] SCR catalyst reactor is the core equipment of selective catalytic reduction denitrification system. It is mainly used to reduce nitrogen oxides in flue gas into harmless nitrogen and water. It mainly consists of reactor body, catalyst bed, ammonia injection system, soot blowing system and monitoring and control device. SCR catalyst reactor is widely used in thermal power plants, steel, cement and other industries. It is an efficient solution for controlling NOx emissions.

[0003] When flue gas enters the SCR reactor, it first passes through a large-particle ash filter to remove larger particles. Ammonia gas is then evenly injected into the flue gas through an ammonia injection grid. After mixing with the flue gas, it enters a gradient rectifier grid to adjust the flue gas flow field. The mixed gas then enters the catalyst layer, where NH3 and NOx undergo a reduction reaction under the action of the catalyst to produce N2 and H2O. The purified flue gas is discharged through the reactor outlet. However, the flue gas after SCR denitrification still carries unreacted particles. Direct emission of these particles causes secondary pollution, thus affecting the treatment effect of SCR denitrification.

[0004] In summary, this invention provides an SCR catalyst reactor device to solve the above-mentioned problems. Utility Model Content

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

[0006] An SCR catalyst reactor apparatus includes an SCR reactor comprising a reaction tower, a mixer for mixing flue gas and ammonia, a connecting pipe for flue gas inlet, a catalyst bed for flue gas treatment, a rectifier and ammonia injection grid, a guide plate for guiding flue gas flow, and a soot blower for soot blowing of the catalyst bed; and a separation assembly including a separation tank for separating particulate matter from the flue gas, a pressurization assembly for improving flue gas flow, and a discharge assembly for collecting and discharging particulate matter; the separation tank includes a cylindrical body, a cone fixed to the bottom of the cylindrical body, and a solid... The system includes a hopper at the bottom of the cone, a spiral exhaust pipe fixed to the top of the cylinder, an inner tube fixed to the inner cavity of the cylinder, a spiral air inlet pipe communicating with the cylinder, and a viewing window for observing the inner cavity of the hopper. One end of the inner tube communicates with the inner cavity of the cylinder, and the other end extends through the inner cavity of the spiral exhaust pipe. The pressurization assembly includes a fan, a first motor for driving the fan to draw air, an exhaust pipe communicating with the outlet of the reaction tower, a guide pipe communicating with the spiral air inlet pipe, and a bracket for supporting the fan and the first motor.

[0007] Furthermore, in this utility model, the other end of the exhaust pipe is connected to the air inlet of the fan, the other end of the guide pipe is connected to the air outlet of the fan, and both the fan and the blower are fixedly connected to the bracket.

[0008] Furthermore, in this utility model, the discharge assembly includes a discharge box, a second motor fixed to the surface of the discharge box, and a dividing wheel located in the inner cavity of the discharge box.

[0009] Furthermore, in this utility model, the output shaft of the second motor passes through the inner cavity of the discharge box and is connected to the dividing wheel for transmission. The discharge box is fixed to the bottom of the hopper and communicates with the inner cavity of the hopper.

[0010] Furthermore, in this invention, the cone is connected to the inner cavity of the hopper, the cylinder is connected to the inner cavity of the cone, and the viewing window is located on the surface of the hopper.

[0011] Furthermore, in this utility model, the ammonia spraying grid is fixed to the inner cavity of the mixer and an ammonia spray gun is installed on its surface; the guide plate is fixed to the upper end of the inner cavity of the reaction tower; and the rectifier is fixed to the inner cavity of the reaction tower and located below the guide plate.

[0012] Furthermore, in this invention, the catalyst layer and the soot blower are provided in three sets. The three sets of catalyst layers are fixed in the inner cavity of the reaction tower and arranged sequentially from top to bottom. Each set of catalyst layers is equipped with a soot blower above it, and each set of soot blowers is connected to external compressed air.

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

[0014] This invention utilizes a separation tank in a separation assembly, comprising a cylinder, a cone, a hopper, a spiral exhaust pipe, an inner pipe, and a spiral intake pipe. Particulate-laden flue gas enters the cylinder through the spiral intake pipe, where, under centrifugal force, the particles are thrown against the cylinder wall and fall into the hopper along the cone, achieving efficient gas-solid separation. A blower in the pressurization assembly, driven by a first motor, extracts flue gas from the reaction tower outlet through an extraction pipe and sends it into the separation tank via a guide pipe, enhancing the flow of the flue gas and ensuring smooth separation. A discharge assembly periodically discharges collected particles, preventing excessive particle accumulation in the hopper from affecting separation efficiency and system operation. A dividing wheel in the discharge assembly rotates under the drive of a second motor, enabling uniform and stable discharge. 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 connection state structure of the separation component of this utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the separator of this utility model;

[0018] Figure 4 This is a front view cross-sectional structural diagram of the SCR reactor of this utility model.

[0019] In the picture:

[0020] 100. SCR reactor; 110. Reaction tower; 120. Mixer; 130. Connecting pipe; 140. Catalyst layer; 150. Rectifier; 160. Baffle plate; 170. Ammonia injection grid; 180. Soot blower; 200. Separation assembly; 210. Separation tank; 211. Cylinder; 212. Cone; 213. Hopper; 214. Spiral exhaust pipe; 215. Inner pipe; 216. Spiral air inlet pipe; 217. Viewing window; 220. Pressurization assembly; 221. Fan; 222. First motor; 223. Exhaust pipe; 224. Baffle pipe; 225. Support; 230. Discharge assembly; 231. Discharge box; 232. Second motor; 233. Dividing wheel. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] like Figure 1-4The image shows the first embodiment of this utility model, which provides an SCR catalyst reactor device, including an SCR reactor 100, comprising a reaction tower 110, a mixer 120 for mixing flue gas and ammonia, a connecting pipe 130 for flue gas inlet, a catalyst layer 140 for flue gas treatment, a rectifier 150 and an ammonia injection grid 170, a guide plate 160 for flue gas flow guidance, and a soot blower 180 for soot blowing of the catalyst layer 140; and a separation assembly 200, including a separation tank 210 for separating flue gas particulate matter, a pressurization assembly 220 for improving flue gas flow, and a discharge assembly 230 for collecting and discharging particulate matter. The separation tank 210 includes a cylindrical body 211 and a component fixed to the bottom of the cylindrical body 211. The cylinder 211 has a cone 212, a hopper 213 fixed to the bottom of the cone 212, a spiral exhaust pipe 214 fixed to the top of the cylinder 211, an inner pipe 215 fixed to the inner cavity of the cylinder 211, a spiral air inlet pipe 216 communicating with the cylinder 211, and a viewing window 217 for observing the inner cavity of the hopper 213. One end of the inner pipe 215 is connected to the inner cavity of the cylinder 211, and the other end extends through the inner cavity of the spiral exhaust pipe 214. The pressurization assembly 220 includes a fan 221, a first motor 222 for driving the fan 221 to draw air, an exhaust pipe 223 communicating with the air outlet of the reaction tower 110, a guide pipe 224 communicating with the spiral air inlet pipe 216, and a bracket 225 for supporting the fan 221 and the first motor 222.

[0024] like Figure 1-4 As shown, flue gas is drawn from the reaction tower 110 through the extraction pipe 223 and sent into the spiral inlet pipe 216 through the guide pipe 224. The fan 221 provides stable airflow power to ensure that sufficient rotation speed is formed in the separator 210 to maintain separation efficiency. At the same time, the negative pressure may reduce the residue of particulate matter in the reaction tower 110. The separator 210 forms a rotating airflow of flue gas through the spiral inlet pipe 216. Centrifugal force is used to throw the particulate matter towards the inner wall of the cylinder 211. The particulate matter slides down the inner wall of the cylinder 211 to the cone 212 and the hopper 213, and is finally discharged through the discharge assembly 230. This process realizes gas-solid separation and greatly reduces the amount of particulate matter carried in the flue gas. One end of the inner pipe 215 is connected to the inner cavity of the cylinder 211, and the other end extends to the inner cavity of the spiral exhaust pipe 214. By extending the airflow path, the flow field distribution is changed, which further promotes the sedimentation of particulate matter.

[0025] The SCR reactor 100 denitrates the flue gas. The ammonia injection grid 170 injects ammonia water into the mixer 120 to fully mix the flue gas with ammonia. Then, the denitrification reaction takes place under the action of the catalyst layer 140. The rectifier 150 and the guide plate 160 can make the flue gas evenly distributed in the reaction tower 110, improving the efficiency of the denitrification reaction. The soot blower 180 regularly blows soot from the catalyst layer 140 to prevent excessive accumulation of particulate matter on the catalyst surface from affecting the catalytic effect. This further ensures the stable operation of the entire device and the denitrification effect. Through the separation of particulate matter by the separation component 200, the pressurization component 220 to ensure system operation, the discharge component 230 to collect and discharge particulate matter, and the multi-faceted cooperation of the SCR reactor 100, the secondary pollution problem caused by the direct emission of unreacted particulate matter carried in the flue gas after SCR denitrification can be effectively solved, thereby improving the treatment effect of SCR denitrification.

[0026] Example 2

[0027] Reference Figure 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0028] In this embodiment, the other end of the exhaust pipe 223 is connected to the air inlet of the fan 221, and the other end of the guide pipe 224 is connected to the air outlet of the fan 221. Both the fan 221 and the fan 225 are fixedly connected to the bracket 225.

[0029] The discharge assembly 230 includes a discharge box 231, a second motor 232 fixed to the surface of the discharge box 231, and a dividing wheel 233 located in the inner cavity of the discharge box 231.

[0030] The output shaft of the second motor 232 passes through the inner cavity of the discharge box 231 and is connected to the dividing wheel 233 for transmission. The discharge box 231 is fixed to the bottom of the hopper 213 and communicates with the inner cavity of the hopper 213.

[0031] The cone 212 is connected to the inner cavity of the hopper 213, the cylinder 211 is connected to the inner cavity of the cone 212, and the viewing window 217 is located on the surface of the hopper 213.

[0032] The ammonia spraying grid 170 is fixed to the inner cavity of the mixer 120 and has an ammonia spray gun installed on its surface. The guide plate 160 is fixed to the upper end of the inner cavity of the reaction tower 110, and the rectifier 150 is fixed to the inner cavity of the reaction tower 110 and is located below the guide plate 160.

[0033] There are three sets of catalyst layers 140 and soot blowers 180. The three sets of catalyst layers 140 are fixed in the inner cavity of the reaction tower 110 and arranged from top to bottom. Each set of catalyst layers 140 is equipped with a soot blower 180 above it, and each set of soot blowers 180 is connected to external compressed air.

[0034] like Figure 1-4 As shown, the flue gas to be treated enters the SCR reactor 100 through the connecting pipe 130. Inside the mixer 120, ammonia is injected by the ammonia spray gun on the ammonia injection grid 170, ensuring thorough mixing of the flue gas and ammonia. The ammonia injection grid 170 is fixed inside the mixer 120 to ensure that the ammonia is evenly dispersed in the flue gas. The mixed flue gas flows upward, first passing through the guide plate 160, which is fixed at the upper end of the reaction tower 110 to guide the flow direction of the flue gas. Then, the flue gas passes through the rectifier 150, which is fixed inside the reaction tower 110 and located above the guide plate 160. Below, the flow of flue gas is made more uniform and stable. Then, the flue gas passes through three sets of catalyst layers 140 in sequence. Under the action of the catalyst, denitrification and other reactions are carried out to treat the pollutants in the flue gas. Each set of catalyst layers 140 is equipped with a soot blower 180, and the soot blower 180 is connected to external compressed air. The catalyst layer 140 can be blown clean periodically to prevent dust accumulation on the catalyst surface from affecting the reaction effect. The flue gas after the reaction enters the separation component 200 again for separation. The clean gas is discharged through the spiral exhaust pipe 214, while the particulate matter falls into the hopper 213 and is discharged through the discharge component 230.

[0035] The presence of the discharge component 230 enables the separated particulate matter to be collected and discharged in a timely manner. When the particulate matter accumulates to a certain extent in the hopper 213, the discharge component 230 starts to work. The second motor 232 drives the dividing wheel 233 in the inner cavity of the discharge box 231 to rotate. The rotation of the dividing wheel 233 can discharge the particulate matter in the hopper 213 in a quantitative manner, avoiding excessive accumulation of particulate matter in the hopper 213 and affecting the separation effect. It also facilitates the centralized processing of the separated particulate matter.

[0036] During use, the flue gas to be treated enters the SCR reactor 100 through the connecting pipe 130. Inside the mixer 120, the ammonia spray gun on the ammonia spray grid 170 sprays ammonia into the flue gas, making the flue gas and ammonia fully mixed. The ammonia spray grid 170 is fixed inside the mixer 120, which can ensure that the ammonia is evenly dispersed in the flue gas.

[0037] The mixed flue gas enters the reaction tower 110 and first passes through the guide plate 160, which is fixed at the upper end of the inner cavity of the reaction tower 110 to guide the flow direction of the flue gas. Then the flue gas passes through the rectifier 150, which is fixed in the inner cavity of the reaction tower 110 and located below the guide plate 160, making the flue gas flow more uniform and stable. After that, the flue gas passes through three sets of catalyst layers 140 in sequence, where denitrification and other reactions are carried out under the action of the catalyst to treat the pollutants in the flue gas. Each set of catalyst layers 140 is equipped with a soot blower 180, which is connected to external compressed air to periodically blow soot from the catalyst layer 140 to prevent dust accumulation on the catalyst surface from affecting the reaction effect.

[0038] The flue gas after being treated by the SCR reactor 100 is discharged from the outlet of the reaction tower 110 and is drawn by the blower 221 through the extraction pipe 223. The first motor 222 drives the blower 221 to extract the gas. The blower 221 and the first motor 222 are supported by the bracket 225. The extracted flue gas enters the spiral inlet pipe 216 of the separator 210 through the guide pipe 224.

[0039] Flue gas enters cylinder 211 through spiral inlet pipe 216, forming a spiral airflow inside cylinder 211. Due to centrifugal force, particulate matter in the flue gas is thrown against the cylinder wall and falls down the cylinder wall to cone 212, and finally enters hopper 213. The purified flue gas is discharged through inner pipe 215 into spiral exhaust pipe 214. The viewing window 217 is located on the surface of hopper 213 and can be used to observe the accumulation of particulate matter inside hopper 213.

[0040] When the particles in the hopper 213 accumulate to a certain level, the discharge assembly 230 starts to work. The second motor 232 drives the dividing wheel 233 in the inner cavity of the discharge box 231 to rotate, discharging the particles in the hopper 213, thus realizing the collection and discharge of particles.

[0041] 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.

[0042] 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. An SCR catalyst reactor apparatus, characterized by: include, The SCR reactor (100) includes a reaction tower (110), a mixer (120) for mixing flue gas with ammonia, a connecting pipe (130) for flue gas inlet, a catalyst layer (140) for flue gas treatment, a rectifier (150) and an ammonia injection grid (170), a guide plate (160) for guiding flue gas flow, and a soot blower (180) for blowing soot from the catalyst layer (140). The separation assembly (200) includes a separation tank (210) for separating particulate matter from flue gas, a pressurization assembly (220) for improving flue gas flow, and a discharge assembly (230) for collecting and discharging particulate matter. The separation tank (210) includes a cylindrical body (211), a cone (212) fixed to the bottom of the cylindrical body (211), a hopper (213) fixed to the bottom of the cone (212), a spiral exhaust pipe (214) fixed to the top of the cylindrical body (211), an inner tube (215) fixed to the inner cavity of the cylindrical body (211), a spiral air inlet pipe (216) communicating with the cylindrical body (211), and a viewing window (217) for observing the inner cavity of the hopper (213). One end of the inner tube (215) is connected to the inner cavity of the cylindrical body (211), and the other end extends through the inner cavity of the spiral exhaust pipe (214). The pressurization assembly (220) includes a fan (221), a first motor (222) for driving the fan (221) to draw air, an exhaust pipe (223) connected to the air outlet of the reaction tower (110), a guide pipe (224) connected to the spiral air inlet pipe (216), and a bracket (225) for supporting the fan (221) and the first motor (222).

2. The SCR catalyst reactor apparatus of claim 1, wherein: The other end of the exhaust pipe (223) is connected to the air inlet of the fan (221), and the other end of the guide pipe (224) is connected to the air outlet of the fan (221). Both the fan (221) and the blower (221) are fixedly connected to the bracket (225).

3. The SCR catalyst reactor apparatus of claim 1, wherein: The discharge assembly (230) includes a discharge box (231), a second motor (232) fixed to the surface of the discharge box (231), and a dividing wheel (233) located in the inner cavity of the discharge box (231).

4. The SCR catalyst reactor apparatus of claim 3, wherein: The output shaft of the second motor (232) passes through the inner cavity of the discharge box (231) and is connected to the dividing wheel (233) for transmission. The discharge box (231) is fixed to the bottom of the hopper (213) and communicates with the inner cavity of the hopper (213).

5. The SCR catalyst reactor apparatus of claim 1, wherein: The cone (212) is connected to the inner cavity of the hopper (213), the cylinder (211) is connected to the inner cavity of the cone (212), and the viewing window (217) is located on the surface of the hopper (213).

6. The SCR catalyst reactor apparatus of claim 1, wherein: The ammonia spray grid (170) is fixed to the inner cavity of the mixer (120) and has an ammonia spray gun installed on its surface. The guide plate (160) is fixed to the upper end of the inner cavity of the reaction tower (110). The rectifier (150) is fixed to the inner cavity of the reaction tower (110) and is located below the guide plate (160).

7. The SCR catalyst reactor apparatus of claim 1, wherein: The catalyst layers (140) and the soot blowers (180) are each provided with three groups, the three groups of catalyst layers (140) are fixed in the inner cavity of the reaction tower (110) and are arranged from top to bottom in sequence, a soot blower (180) is installed above each group of catalyst layers (140), and each group of soot blowers (180) is connected with external compressed air.

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