Biomass boiler flue gas denitration reducing agent high-efficiency atomizing device

Abstract

The utility model discloses biomass boiler flue gas denitration reducing agent high -efficient atomizing device, including: the processing jar, the processing jar one side is provided with the temperature rise room, and the first connecting pipe is fixedly arranged on the upper portion one side of processing jar, and the other end of first connecting pipe is connected to the upper portion one side of temperature rise room, and the one side of temperature rise room is provided with the mixing chamber. Advantageous effects, the device processing jar is provided with water, can filter impurity and fly ash when the flue gas enters, effectively reduces the risk of blockage, cooperates the heater of temperature rise room, can heat the flue gas to the temperature of most suitable and ammonia reaction, improves denitration efficiency, and the flue gas is fully fused with atomized ammonia in the mixing chamber, guarantees the reaction uniformity, and then enters the reaction chamber and the catalyst and generates nitrogen and water, can high -efficient stable denitration, and the atomizing device is provided with self -cleaning structure, can regularly clean the nozzle, avoids fly ash blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas purification, and in particular to a high-efficiency atomization device for denitrification reducing agent in biomass boiler flue gas. Background Technology

[0002] Biomass boilers are clean energy utilization equipment that uses renewable biomass such as straw, wood chips, and agricultural and forestry waste as the main fuel. They have the advantages of abundant resources, high renewability, and reduced fossil energy consumption. They can effectively reduce carbon dioxide emissions and are in line with the trend of green and low-carbon development. Therefore, they have been widely promoted and applied in the fields of industrial heating and power generation.

[0003] Currently, selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR) methods are commonly used for denitrification in flue gas treatment of coal-fired boilers or industrial kilns. However, flue gas typically contains a large amount of fly ash particles, which easily deposit inside the equipment, causing blockage of airflow channels and reducing the system's ventilation efficiency. Simultaneously, fly ash easily adheres to and clogs ammonia injection nozzles, making it difficult for ammonia to mix evenly with the flue gas, severely impacting the denitrification effect. Utility Model Content

[0004] The main objective of this invention is to address the problems raised in the background section.

[0005] To address the aforementioned problems, this utility model proposes a high-efficiency atomization device for denitrification reducing agent in biomass boiler flue gas, comprising: a treatment tank, a heating chamber on one side of the treatment tank, a first connecting pipe fixedly installed on the upper side of the treatment tank, the other end of the first connecting pipe connected to the upper side of the heating chamber, a mixing chamber on one side of the heating chamber, a second connecting pipe fixedly installed on the lower side of the heating chamber, the other end of the second connecting pipe fixedly connected to the lower side of the mixing chamber, and a second exhaust fan fixedly fitted on the second connecting pipe; a reaction chamber fixedly installed on the top surface of the mixing chamber, an exhaust pipe fixedly installed at the center of the top surface of the reaction chamber, and a first exhaust fan fixedly fitted on the exhaust pipe.

[0006] In one embodiment, an air inlet pipe is fixedly installed on the lower side of one side of the treatment tank, a water inlet is fixedly installed in the middle of one side of the treatment tank, and a drain outlet is fixedly installed in the center of the bottom surface of the treatment tank.

[0007] In one embodiment, the mixing chamber has two mounting slots on one side, one above the other, and a heater is installed in the mounting slot.

[0008] In one embodiment, two atomizing devices are fixedly spaced on both sides of the lower part of the inner wall of the mixing chamber. A drive motor is fixedly installed on one side of each atomizing device on the inner wall of the mixing chamber. A second gear is fixedly installed at the output end of each drive motor. A baffle is fixedly installed on the inner wall of the mixing chamber above the atomizing device.

[0009] In one embodiment, the inner wall of the reaction chamber is provided with four racks, and a catalyst is slidably disposed on each rack.

[0010] In one embodiment, the atomizing device includes a delivery pipe and a cleaning plate. Multiple nozzles are fixedly spaced in the groove on the top surface of the delivery pipe, and connecting rods are fixedly installed on both sides of the delivery pipe. Several bristles are fixedly installed on the inner wall of one side of the cleaning plate, and sleeves are installed at both ends of the cleaning plate. A first gear is fixedly fitted on the outer wall of one of the sleeves, and both sleeves are rotatably fitted on the outer wall of the connecting rod. The first gear on one of the sleeves meshes with the second gear installed at the output end of the drive motor.

[0011] In one embodiment, the delivery pipe is fixedly connected to both sides of the mixing chamber by connecting rods at both ends, one of which is hollow inside and completely penetrates one side of the mixing chamber to connect with an external ammonia delivery device.

[0012] Beneficial effects:

[0013] This device pre-filters flue gas by injecting water into the treatment tank, effectively removing fly ash impurities and preventing blockages in subsequent systems. An exhaust fan is installed on the second connecting pipe, working in conjunction with a heating chamber to ensure stable flue gas entry and reach the appropriate reaction temperature. The atomizing device fully atomizes the ammonia gas, which efficiently mixes with the flue gas in the mixing chamber before entering the reaction chamber. Under the action of a catalyst, nitrogen and water are generated, achieving efficient denitrification. Simultaneously, the atomizing device is equipped with a self-cleaning mechanism that automatically cleans the nozzles, preventing clogging and ensuring long-term stable operation. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main axial structure of this utility model; Figure 2 This is a schematic diagram of the main axial structure of this utility model; Figure 3 This is a schematic cross-sectional view of the top of the heater of this utility model; Figure 4 This is a cross-sectional structural diagram of the processing tank of this utility model; Figure 5 This is a cross-sectional view of the mixing chamber structure of this utility model; Figure 6 This is a schematic cross-sectional view of the reaction chamber of this utility model; Figure 7 This is an exploded structural diagram of the atomizing device of this utility model; Figure 8 This is the utility model Figure 5 Enlarged structural diagram at point A.

[0015] The annotations in the attached figures are explained as follows: 1. Processing tank; 101. Air inlet pipe; 102. Water inlet; 103. Drain outlet; 2. Heating chamber; 3. Mixing chamber; 31. Baffle; 4. Reaction chamber; 5. First connecting pipe; 6. First exhaust fan; 7. Exhaust pipe; 8. Second exhaust fan; 9. Second connecting pipe; 10. Heater; 11. Atomizing device; 111. Conveying pipe; 112. Nozzle; 113. Cleaning plate; 114. Sleeve; 115. Brush; 116. First gear; 117. Connecting rod; 12. Catalyst; 13. Drive motor; 131. Second gear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] To achieve the above-mentioned utility model objectives, such as Figure 1-6As shown, this utility model provides a high-efficiency atomization device for denitrification reducing agent in biomass boiler flue gas, including: a treatment tank 1, a heating chamber 2 on one side of the treatment tank 1, a first connecting pipe 5 fixedly installed on the upper side of the treatment tank 1, the other end of the first connecting pipe 5 connected to the upper side of the heating chamber 2, a mixing chamber 3 on one side of the heating chamber 2, a second connecting pipe 9 fixedly installed on the lower side of the heating chamber 2, the other end of the second connecting pipe 9 fixedly connected to the lower side of the mixing chamber 3, and a second exhaust fan 8 fixedly fitted on the second connecting pipe 9; a reaction chamber 4 fixedly installed on the top surface of the mixing chamber 3, an exhaust pipe 7 fixedly installed at the center of the top surface of the reaction chamber 4, and a first exhaust fan 6 fixedly fitted on the exhaust pipe 7; and a reaction chamber 4 fixedly installed on the top surface of the reaction chamber 4, with an exhaust pipe 7 fixedly installed at the center of the exhaust pipe 7. An air inlet pipe 101 is fixedly installed at the lower position. A water inlet 102 is fixedly installed at the middle of one side of the treatment tank 1. A drain outlet 103 is fixedly installed at the center of the bottom surface of the treatment tank 1. Two mounting slots are opened on one side of the mixing chamber 3, and a heater 10 is installed in the mounting slot. Two atomizing devices 11 are fixedly spaced on both sides of the lower position of the inner wall of the mixing chamber 3. A drive motor 13 is fixedly installed on one side of each atomizing device 11 on the inner wall of the mixing chamber 3. A second gear 131 is fixedly installed at the output end of each drive motor 13. A baffle 31 is fixedly installed on the inner wall of the mixing chamber 3 above the atomizing device 11. Four placement racks are provided on the inner wall of the reaction chamber 4. A catalyst 12 is slidably placed on each placement rack.

[0018] Specifically, the treatment tank 1 is a container for preliminary treatment of flue gas. An air inlet pipe 101 is fixedly installed on one side near the bottom to transport the flue gas generated by the boiler. A water inlet 102 is provided in the middle to facilitate the addition of water during equipment operation to moisten the flue gas, capture fly ash and impurities, thereby reducing blockage of downstream equipment. A drain outlet 103 is provided in the center of the bottom to discharge impurity water and fly ash sediment to prevent accumulation and blockage.

[0019] The heating chamber 2 is connected to the treatment tank 1 via the first connecting pipe 5. The lower part of the heating chamber 2 is connected to the mixing chamber 3 via the second connecting pipe 9. A heater 10 is installed inside the heating chamber 2. When the flue gas enters the heating chamber 2 after being pretreated by the treatment tank 1, the temperature is heated to the most suitable temperature range for the reaction between ammonia and flue gas under the action of the heater 10. Temperature control can ensure the efficiency of subsequent ammonia atomization and denitrification reaction, while reducing the influence of moisture in the flue gas on the reaction.

[0020] The mixing chamber 3 is located on the side of the heating chamber 2. The reaction chamber 4 is fixedly installed on the upper part, and the lower part is connected to the heating chamber 2 through the second connecting pipe 9. The mixing chamber 3 is equipped with an atomizing device 11. A drive motor 13 is fixed near the inner wall of the atomizing device 11, and a second gear 131 is fixed at its output end. A baffle 31 is fixed above the atomizing device 11. After the flue gas enters the mixing chamber 3 from the heating chamber 2, it is fully mixed with the ammonia sprayed by the atomizing device. The drive motor 13 drives the brush bristles 115 of the atomizing device 11 to rotate around the conveying pipe 111 to clean the dust and impurities on its surface, ensuring that the ammonia is atomized evenly and is not easily blocked. At the same time, the baffle 31 can guide the flue gas to fully contact the ammonia, thereby improving the mixing efficiency before denitrification.

[0021] The reaction chamber 4 is located above the mixing chamber 3. Its inner wall is equipped with multiple sliding racks, each of which holds a catalyst 12. An exhaust pipe 7 is fixed in the center of the top surface of the reaction chamber 4, and a first exhaust fan 6 is fitted on the exhaust pipe 7. The mixed flue gas enters the reaction chamber 4 and comes into contact with the catalyst 12 to undergo a chemical reaction, converting the nitrogen oxides (NOx) in the flue gas into nitrogen and water, thus achieving denitrification. After removing the bolts of the reaction chamber 4, the racks can be slid out to facilitate the loading, unloading, and replacement of the catalyst 12. The catalysts 12 are placed individually at intervals and can be removed individually according to different wear levels, ensuring reaction efficiency and maintenance convenience.

[0022] The first connecting pipe 5 is used for the flue gas to enter the heating chamber 2 from the treatment tank 1, ensuring a stable flow of the flue gas. The second connecting pipe 9 transports the heated flue gas to the mixing chamber 3, and is fitted with a second exhaust fan 8 to continuously maintain the flow of flue gas and prevent backflow or stagnation. The exhaust pipe 7 and the first exhaust fan 6 are used to exhaust the flue gas after the reaction, ensuring a stable negative pressure environment in the reaction chamber 4, facilitating the smooth discharge of flue gas to the outside.

[0023] To achieve the above-mentioned utility model objectives, such as Figure 1-8 As shown, this utility model provides a high-efficiency atomizing device for denitrification reducing agent in biomass boiler flue gas. The atomizing device 11 includes a conveying pipe 111 and a cleaning plate 113. Multiple nozzles 112 are fixedly spaced in the groove on the top surface of the conveying pipe 111. Connecting rods 117 are fixedly installed on both sides of the conveying pipe 111. Several bristles 115 are fixedly installed on the inner wall of one side of the cleaning plate 113. Sleeves 114 are installed at both ends of the cleaning plate 113. A first gear 116 is fixedly installed on the outer wall of one sleeve 114. Both sleeves 114 are rotatably installed on the outer wall of the connecting rods 117. The first gear 116 on one sleeve 114 meshes with the second gear 131 installed at the output end of the drive motor 13. The conveying pipe 111 is fixedly connected to both sides of the mixing chamber 3 through the connecting rods 117 at both ends. One of the connecting rods 117 is hollow inside and completely penetrates one side of the mixing chamber 3 to connect with an external ammonia conveying device.

[0024] Specifically, the top surface of the delivery pipe 111 of the atomizing device 11 is provided with multiple nozzles 112 at fixed intervals, which are used to uniformly atomize and spray reducing agents such as ammonia into the flue gas.

[0025] Connecting rods 117 are fixed on both sides of the conveying pipe 111 to fix the conveying pipe 111 on both sides of the mixing chamber 3 and ensure the stability of the structure. Several bristles 115 are fixed on one inner wall of the cleaning plate 113 to clean the surface of the nozzle 112 and prevent fly ash from clogging. Sleeves 114 are provided at both ends of the cleaning plate 113, and a first gear 116 is fixedly sleeved on the outer wall of one of the sleeves 114.

[0026] Both sleeves 114 can be rotatably mounted on the outer wall of the connecting rod 117. The first gear 116 meshes with the second gear 131 at the output end of the drive motor 13 to drive the cleaning plate 113. The connecting rod 117 has a hollow interior that runs through the entire mixing chamber 3 and is connected to an external ammonia supply device to provide atomizing liquid source for the nozzle 112.

[0027] The working process of this utility model is as follows: The flue gas first enters the treatment tank 1 through the inlet pipe 101. The treatment tank 1 contains a suitable amount of water to form a water film, used to moisten the flue gas and capture fly ash and impurities, effectively preventing fly ash from adhering to the equipment surface and affecting operation. The bottom of the treatment tank 1 has a drain outlet 103 to discharge settled impurities and maintain the cleanliness of the inside of the treatment tank 1. Simultaneously, water can be continuously replenished through the water inlet 102 to achieve circulation and remove impurities. The flue gas then enters the heating chamber 2 through the first connecting pipe 5. The heater 10 in the heating chamber 2 heats the flue gas to a suitable temperature for the reaction of ammonia water or denitrification reducing agent, thereby improving the denitrification reaction efficiency. The flue gas then enters the mixing chamber 3 through the second connecting pipe 9. The second exhaust fan 8 enhances the flue gas flow, ensuring uniform distribution of the flue gas within the mixing chamber 3. The atomizing devices 11 on both sides of the mixing chamber 3 atomize the denitrification reducing agent into tiny droplets and spray them into the flue gas through the delivery pipe 111. The nozzles 112 evenly distribute the atomized denitrification reducing agent. To ensure uniform atomization, sleeves 114 at both ends of the cleaning plate 113 are rotatably mounted on the connecting rod 117. The first gear 116 on one of the sleeves 114 meshes with the second gear 131 at the output end of the drive motor 13. The drive motor 13 drives the gear to rotate, which in turn drives the cleaning plate 113 to rotate, regularly cleaning the conveying pipe 111 and the nozzle 112 to prevent fly ash blockage. The external ammonia supply device continuously supplies liquid to the nozzle 112 through the hollow connecting rod 117 to ensure continuous and stable atomization. The atomized flue gas enters the reaction chamber 4. The catalyst 12 is slidably placed on the rack in the reaction chamber 4. Ammonia water or reducing agent reacts chemically with nitrogen oxides in the flue gas under the action of the catalyst 12 to generate harmless nitrogen gas and water, achieving efficient denitrification. The flue gas after the reaction is completed is discharged through the exhaust pipe 7. The first exhaust fan 6 assists in discharging the flue gas to the external environment to ensure smooth flue gas flow and maintain stable negative pressure in the system. In the entire system, the atomizing device 11 is equipped with brushes 115 and cleaning plates 113 to achieve automatic self-cleaning function. The water layer in the treatment tank 1 can settle fly ash and protect the nozzles 112 and pipelines. The second exhaust fan 8 works in conjunction with the heater 10 to achieve continuous and stable flue gas treatment and denitrification operation.

[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-efficiency atomizing device for denitrification and reducing agent in biomass boiler flue gas, comprising: The processing tank (1) is characterized in that a heating chamber (2) is provided on one side of the processing tank (1), a first connecting pipe (5) is fixedly provided on the upper side of the processing tank (1), the other end of the first connecting pipe (5) is connected to the upper side of the heating chamber (2), a mixing chamber (3) is provided on one side of the heating chamber (2), a second connecting pipe (9) is fixedly provided on the lower side of the heating chamber (2), the other end of the second connecting pipe (9) is fixedly connected to the lower side of the mixing chamber (3), and a second exhaust fan (8) is fixedly sleeved on the second connecting pipe (9); a reaction chamber (4) is fixedly provided on the top surface of the mixing chamber (3), an exhaust pipe (7) is fixedly provided at the center of the top surface of the reaction chamber (4), and a first exhaust fan (6) is fixedly sleeved on the exhaust pipe (7).

2. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 1, characterized in that, An air inlet pipe (101) is fixedly installed on one side of the lower part of the treatment tank (1), a water inlet (102) is fixedly installed on one side of the middle part of the treatment tank (1), and a drain outlet (103) is fixedly installed on the bottom center of the treatment tank (1).

3. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 2, characterized in that, The mixing chamber (3) has two mounting slots on one side, one above the other, and a heater (10) is installed in the mounting slot.

4. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 3, characterized in that, Two atomizing devices (11) are fixedly spaced on both sides of the lower part of the inner wall of the mixing chamber (3). A drive motor (13) is fixedly installed on one side of each atomizing device (11) on the inner wall of the mixing chamber (3). A second gear (131) is fixedly installed at the output end of each drive motor (13). A baffle (31) is fixedly installed above the atomizing device (11) on the inner wall of the mixing chamber (3).

5. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 4, characterized in that, The inner wall of the reaction chamber (4) is provided with four racks, and a catalyst (12) is slidably placed on each rack.

6. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 5, characterized in that, The atomizing device (11) includes a delivery pipe (111) and a cleaning plate (113). Multiple nozzles (112) are fixedly spaced in the groove on the top surface of the delivery pipe (111). Connecting rods (117) are fixedly installed on both sides of the delivery pipe (111). Several bristles (115) are fixedly installed on the inner wall of one side of the cleaning plate (113). Sleeves (114) are installed at both ends of the cleaning plate (113). A first gear (116) is fixedly installed on the outer wall of one sleeve (114). Both sleeves (114) are rotatably installed on the outer wall of the connecting rod (117). The first gear (116) on one sleeve (114) meshes with the second gear (131) installed at the output end of the drive motor (13).

7. The high-efficiency atomizing device for denitrification and reducing agent of biomass boiler flue gas as described in claim 6, characterized in that, The conveying pipe (111) is fixedly connected to both sides of the mixing chamber (3) by connecting rods (117) at both ends. One of the connecting rods (117) is hollow inside and completely penetrates one side of the mixing chamber (3) to connect with the external ammonia conveying device.

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