Denitration device special for biomass boiler

Abstract

The utility model discloses a special denitration device for a biomass boiler, and particularly relates to the field of biomass boiler denitration, the special denitration device comprises an SCR (Selective Catalytic Reduction) reactor shell, and a denitration mechanism is arranged in the SCR reactor shell. Ammonia water is sprayed out through a water pump, a water inlet pipe, a water storage tank and an atomizing nozzle to be mixed with flue gas, the flue gas passes through a heating sheet and is heated through a flow guide plate, nitrogen and water are generated under the action of a catalyst on a placing plate, and the flue gas is fully decomposed and reduced, so that particle dust in the flue gas of the biomass boiler is conveniently filtered and denitrified; the SCR reactor shell is composed of the clay mineral layer, the polytetrafluoroethylene layer, the plant fiber material and the base layer, the temperature range of the biomass boiler flue gas is completely met, and the SCR reactor shell has the capacity of resisting heavy metal, alkali metal and biomass oil.

Description

Technical Field

[0001] The utility model relates to the field of denitration of biomass boilers, and more specifically, to a special denitration device for biomass boilers. Background Art

[0002] Biomass boiler is a type of boiler. A boiler that uses biomass energy as fuel is called a biomass boiler. It is divided into biomass steam boiler, biomass hot water boiler, biomass hot air furnace, biomass thermal oil furnace, vertical biomass boiler, horizontal biomass boiler, etc.

[0003] During the operation of biomass boilers, a large amount of flue gas is generated, which contains harmful substances such as SO2, NOX, particulate matter, and heavy metals, biomass oil and other substances that are different from coal-fired boilers. However, most of the existing biomass boiler-specific denitrification devices do not have the characteristics of resistance to heavy metals, alkali metals, and biomass oil, which will reduce the service life of the denitrification device and may also cause poor flue gas denitrification effect;

[0004] Therefore, in order to solve the above problems, a special denitrification device for biomass boilers is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present utility model provide a denitration device dedicated to a biomass boiler to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a denitration device for biomass boiler, comprising an SCR reactor shell, a denitration mechanism is arranged inside the SCR reactor shell, and the denitration mechanism comprises a filter box, an air inlet pipe, a filter screen, a water inlet pipe, an atomizing nozzle, a guide plate, a heating plate, a placement plate, an exhaust pipe, a water pump and a water storage tank;

[0007] A filter box is fixedly connected to the side wall of the SCR reactor shell, an air inlet pipe is fixedly connected to the interior of the filter box, a filter screen is fixedly connected to the interior of the filter box, a water inlet pipe runs through the interior of the SCR reactor shell, an atomizing nozzle is fixedly connected to the top of the water inlet pipe, a guide plate is fixedly connected to the inner wall of the SCR reactor shell and located above the atomizing nozzle, a heating plate is provided on the inner wall of the SCR reactor shell and located below the side of the guide plate, a placement plate is slidably connected to the interior of the SCR reactor shell and located below the heating plate, an exhaust pipe is fixedly connected to the side wall of the SCR reactor shell and located below the placement plate, one end of the water inlet pipe is connected to a water pump through a flange, and a water storage tank is provided at the bottom end of the water pump.

[0008] Preferably, the side wall of the SCR reactor housing is provided with an adding mechanism, which includes a limiting plate, a placement container, a handle, a baffle, a sealing block, a slide rail, a clamping block, a pull rod, a pull plate, a spring assembly and a clamping slot.

[0009] Preferably, a limiting plate is fixedly connected to the inside of the SCR reactor shell, a placing container is fixedly connected to the top of the placing plate, a handle is fixedly connected to the top of the placing plate and located on the side of the placing container, a baffle is screwed on the side wall of the SCR reactor shell and located on the side of the placing plate, a sealing block is fixedly connected to the side wall of the baffle, a slide rail is fixedly connected to the side wall of the SCR reactor shell and located above the baffle, a clamping block is slidably connected to the outer wall of the slide rail, a pull rod is fixedly connected to the top of the clamping block, a pull plate is fixedly connected to the top of the pull rod, a spring assembly is fixedly connected to the top of the clamping block and located on the outer wall of the pull rod, and a clamping groove is provided on the top of the baffle.

[0010] Preferably, the SCR reactor shell is configured to have four layers, and each layer comprises a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material and a base layer.

[0011] Preferably, three groups of filter screens are provided, and the positions of the three groups of filter screens are distributed in parallel along the inner wall of the filter box.

[0012] Preferably, a connection port is provided on the contact surface between the filter box and the SCR reactor housing, three groups of placement plates are provided, and the interior of the placement plates is in a hollow mesh shape.

[0013] Preferably, a water inlet is provided at the top of the water tank, and the side surface of the guide plate is arc-shaped.

[0014] Preferably, the sealing block is made of rubber material, and the clamping block forms a sliding structure with the slide rail through a pull rod and a spring assembly.

[0015] Technical effects and advantages of the utility model:

[0016] 1. Compared with the prior art, the device allows flue gas to enter the filter box through the air inlet pipe, and removes dust and particulate matter in the flue gas through the filter screen, sprays ammonia water through the water pump, water inlet pipe, water storage tank and atomizing nozzle to mix with the flue gas, and allows the flue gas to pass through the heating plate and heat up through the guide plate. Nitrogen and water are generated under the action of the catalyst placed on the plate, and the flue gas is fully decomposed and reduced, thereby facilitating the filtering and denitrification of particulate dust in the flue gas of the biomass boiler, and can meet the ultra-low emission requirements of NOX of the flue gas of the biomass boiler. The shell of the SCR reactor is composed of a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material and a base layer, which fully meets the temperature range of the flue gas of the biomass boiler, and also has the ability to resist heavy metals, alkali metals and biomass oil, further improving the service life of the device.

[0017] 2. Compared with the prior art, the device controls the movement of the card block through a pull plate, a pull rod, a spring assembly and a slide rail, moves the card block away from the card slot as a whole, opens the baffle and the sealing block, controls the placement plate to slide out or insert into the SCR reactor shell through a handle and a limit plate, adds the catalyst inside the placement container, inserts the card block into the card slot, and fixes the baffle, thereby facilitating the addition or replacement of the catalyst and facilitating daily use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the main body of the utility model from the first perspective.

[0019] Figure 2 This is a schematic diagram of the structure of the main body of the utility model from the second viewing angle.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the main body of the utility model.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the SCR reactor shell of the utility model.

[0022] Figure 5 This is a schematic diagram of the adding mechanism of the utility model.

[0023] Figure 6 This is a schematic diagram of the structure of area A of the utility model.

[0024] The accompanying drawings are marked as follows: 1. SCR reactor housing; 2. Denitrification mechanism; 201. Filter box; 202. Air inlet pipe; 203. Filter screen; 204. Water inlet pipe; 205. Atomizing nozzle; 206. Guide plate; 207. Heating plate; 208. Placement plate; 209. Exhaust pipe; 210. Water pump; 211. Water storage tank; 3. Adding mechanism; 301. Limiting plate; 302. Placement container; 303. Handle; 304. Baffle; 305. Sealing block; 306. Slide rail; 307. Block; 308. Pull rod; 309. Pull plate; 310. Spring assembly; 311. Slot. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] As attached Figures 1 to 4The biomass boiler dedicated denitrification device shown includes an SCR reactor housing 1, a denitrification mechanism 2 is arranged inside the SCR reactor housing 1, and the denitrification mechanism 2 includes a filter box 201, an air inlet pipe 202, a filter screen 203, a water inlet pipe 204, an atomizing nozzle 205, a guide plate 206, a heating plate 207, a placement plate 208, an exhaust pipe 209, a water pump 210 and a water storage tank 211;

[0028] A filter box 201 is fixedly connected to the side wall of the SCR reactor housing 1, an air inlet pipe 202 is fixedly connected to the inside of the filter box 201, a filter screen 203 is fixedly connected to the inside of the filter box 201, a water inlet pipe 204 runs through the inside of the SCR reactor housing 1, an atomizing nozzle 205 is fixedly connected to the top of the water inlet pipe 204, a guide plate 206 is fixedly connected to the inner wall of the SCR reactor housing 1 and located above the atomizing nozzle 205, a heating plate 207 is provided on the inner wall of the SCR reactor housing 1 and located below the side of the guide plate 206, a placement plate 208 is slidably connected to the inside of the SCR reactor housing 1 and located below the heating plate 207, an exhaust pipe 209 is fixedly connected to the side wall of the SCR reactor housing 1 and located below the placement plate 208, one end of the water inlet pipe 204 is connected to a water pump 210 through a flange, and a water storage tank 211 is provided at the bottom of the water pump 210.

[0029] Wherein: the flue gas generated by the boiler enters the filter box 201 through the air inlet pipe 202, and enters the SCR reactor housing 1 after being filtered by the filter screen 203. By setting three groups of filter screens 203, the filtering effect is improved to remove dust and particulate matter in the flue gas. Then, it is necessary to turn on the water pump 210 and the heating plate 207, and the ammonia water in the water storage tank 211 is sprayed out from the atomizing nozzle 205 through the water inlet pipe 204, so that the exhaust gas passing through it is mixed with the ammonia water. Then, under the action of the guide plate 206, the flue gas mixed with the ammonia water passes through the heating plate 207 and is heated to 320°C-400°C. Then, it passes through the placement plate 208, and nitrogen and water are generated under the action of the catalyst on the placement plate 208. By setting multiple groups of placement plates 208, it is convenient to fully decompose the flue gas. Then, It is discharged through the exhaust pipe 209, and at the same time, the SCR reactor shell 1 is composed of a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material and a base layer. The clay mineral layer can adsorb heavy metals and has the ability to resist heavy metals. The polytetrafluoroethylene layer has excellent corrosion resistance, high temperature resistance and low temperature resistance, thereby meeting the characteristics of low furnace temperature and high exhaust temperature of the biomass boiler, and at the same time has the ability to resist alkali metals. The plant fiber material has natural flame retardant, oil absorption, moisture absorption and other properties, thereby having the ability to resist biomass oil, thereby facilitating the filtering and denitrification of particulate dust in the flue gas of the biomass boiler, which can meet the ultra-low emission requirements of NOX of the flue gas of the biomass boiler, and at the same time fully meet the temperature range of the flue gas of the biomass boiler, and also have the ability to resist heavy metals, alkali metals and biomass oil.

[0030] Embodiment 2

[0031] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods. Figures 1 to 6As shown, see the following description for details: the side wall of the SCR reactor housing 1 is provided with an adding mechanism 3, the adding mechanism 3 includes a limiting plate 301, a placing container 302, a handle 303, a baffle 304, a sealing block 305, a slide rail 306, a clamping block 307, a pull rod 308, a pull plate 309, a spring assembly 310 and a clamping groove 311, the inside of the SCR reactor housing 1 is fixedly connected with the limiting plate 301, the top of the placing plate 208 is fixedly connected with the placing container 302, the top of the placing plate 208 and the placing container 302 are located A handle 303 is fixedly connected to the side of the SCR reactor housing 1, a baffle 304 is screwed to the side of the placement plate 208, a sealing block 305 is fixedly connected to the side wall of the baffle 304, a slide rail 306 is fixedly connected to the side wall of the SCR reactor housing 1 and located above the baffle 304, a block 307 is slidably connected to the outer wall of the slide rail 306, a pull rod 308 is fixedly connected to the top of the block 307, a pull plate 309 is fixedly connected to the top of the pull rod 308, and a pull rod 308 is fixedly connected to the top of the block 307. The spring assembly 310 is fixedly connected, and a slot 311 is provided at the top of the baffle 304; further, the pull plate 309 is pulled upward to drive the pull rod 308 to move in the same direction, thereby driving the block 307 to compress the spring assembly 310 and move along the track of the slide rail 306, so that the block 307 is moved away from the slot 311 as a whole, and then the baffle 304 is moved to open the baffle 304 and the sealing block 305, and the placement plate 208 is slid out of the SCR reactor housing 1 along the inner wall of the limit plate 301 through the handle 303, and The catalyst is added inside the placement container 302, and then the placement plate 208 is inserted into the SCR reactor housing 1 along the limiting plate 301, and the baffle 304 and the sealing block 305 are rotated in the opposite direction. The sealing block 305 seals the opening of the side wall of the SCR reactor housing 1 to prevent the escape of smoke. Finally, the pull plate 309 needs to be loosened, and the spring assembly 310 will restore the elastic force, and the card block 307 will be inserted into the card slot 311 to fix the baffle 304, thereby facilitating the addition or replacement of the catalyst and facilitating daily use.

[0032] As a preferred embodiment, the SCR reactor shell 1 is configured to have four layers, and each layer is a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material, and a base layer; further, the clay mineral layer can adsorb heavy metals and has the ability to resist heavy metals, the polytetrafluoroethylene layer has excellent corrosion resistance, high temperature resistance, and low temperature resistance, thereby meeting the characteristics of low furnace temperature and high exhaust temperature of the biomass boiler, and at the same time has the ability to resist alkali metals, and the plant fiber material has natural flame retardant, oil absorption, moisture absorption and other properties, thereby having the ability to resist biomass oil, so that the SCR reactor shell 1 can fully meet the temperature range of the biomass boiler flue gas, and also has the ability to resist heavy metals, alkali metals, and biomass oil.

[0033] As a preferred embodiment, three groups of filter screens 203 are provided, and the positions of the three groups of filter screens 203 are distributed in parallel along the inner wall of the filter box 201; further, by providing three groups of filter screens 203, the filtering effect is improved to remove dust and particulate matter in the smoke.

[0034] As a preferred embodiment, a connection port is provided on the contact surface between the filter box 201 and the SCR reactor housing 1, three groups of placement plates 208 are provided, and the interior of the placement plates 208 is in a hollow mesh shape; further, by providing the connection port, it is convenient for the flue gas after filtration to enter the interior of the SCR reactor housing 1, and the three groups of placement plates 208 are convenient for fully decomposing and reducing the flue gas, and the hollow mesh shape of the interior facilitates the flue gas to pass through the placement plates 208 and be discharged from the exhaust pipe 209.

[0035] As a preferred embodiment, a water inlet is provided at the top of the water tank 211, and the side of the guide plate 206 is arc-shaped; further, by providing the water inlet, it is convenient to pour ammonia water into the water tank 211, and by providing the guide plate 206 in an arc shape, it is convenient to guide the flow direction of the flue gas.

[0036] As a preferred embodiment, the sealing block 305 is made of rubber, and the block 307 forms a sliding structure with the slide rail 306 through the pull rod 308 and the spring assembly 310; further, by setting the sealing block 305 to be made of rubber material, the rubber has good sealing performance, and the opening of the side wall of the SCR reactor housing 1 is sealed to prevent the escape of smoke, and the pull plate 309 drives the pull rod 308 to move in the same direction, thereby driving the block 307 to compress the spring assembly 310 and move along the trajectory of the slide rail 306, so as to move the block 307 away from the slot 311 as a whole, thereby achieving the purpose of controlling the movement of the block 307.

[0037] The working process of the utility model is as follows: when using the biomass boiler dedicated denitrification device, first, the flue gas generated by the boiler needs to enter the filter box 201 through the air inlet pipe 202, and enter the SCR reactor shell 1 after being filtered by the filter screen 203. By setting three sets of filter screens 203, the filtering effect is improved to remove dust and particulate matter in the flue gas. Subsequently, the water pump 210 and the heating plate 207 need to be turned on, and the ammonia water in the water storage tank 211 is sprayed out from the atomizing nozzle 205 through the water inlet pipe 204, so that the exhaust gas passing through it is mixed with the ammonia water, and then under the action of the guide plate 206, the ammonia water is mixed with the ammonia water. Under the condition, the flue gas mixed with ammonia water passes through the heating plate 207 and is heated to 320℃-400℃. Then, it passes through the placement plate 208, and nitrogen and water are generated under the action of the catalyst on the placement plate 208. By setting multiple groups of placement plates 208, it is convenient to fully decompose the flue gas. Then, it is discharged through the exhaust pipe 209. At the same time, the SCR reactor shell 1 is composed of a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material and a base layer. The clay mineral layer can absorb heavy metals and has the ability to resist heavy metals. The polytetrafluoroethylene layer has excellent corrosion resistance, high temperature resistance and low temperature resistance. Thus, the characteristics of the biomass boiler with low furnace temperature and high exhaust temperature are met, and at the same time, it has the ability to resist alkali metals. The plant fiber material has natural flame retardant, oil absorption, moisture absorption and other properties, so it has the ability to resist biomass oil; then, when the catalyst is used up and needs to be added, it is necessary to pull the pull plate 309 upward to drive the pull rod 308 to move in the same direction, thereby driving the card block 307 to compress the spring assembly 310, and move along the track of the slide rail 306, so that the card block 307 is away from the card slot 311 as a whole, and then the baffle 304 is moved to open the baffle 304 and the sealing block 305, and the handle 303 is used to pull the The placement plate 208 slides out of the SCR reactor housing 1 along the inner wall of the limiting plate 301, and the catalyst is added to the inside of the placement container 302. Subsequently, the placement plate 208 is inserted into the SCR reactor housing 1 along the limiting plate 301, and the baffle 304 and the sealing block 305 are rotated in the opposite direction. The sealing block 305 seals the opening of the side wall of the SCR reactor housing 1 to prevent the escape of flue gas. Finally, the pull plate 309 needs to be loosened, the spring assembly 310 will restore the elastic force, and the card block 307 will be inserted into the card slot 311 to fix the baffle 304. This is the working principle of the denitrification device dedicated to the biomass boiler.

[0038] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A denitration device for biomass boilers, comprising an SCR reactor housing (1), characterized in that: A denitration mechanism (2) is arranged inside the SCR reactor housing (1), and the denitration mechanism (2) comprises a filter box (201), an air inlet pipe (202), a filter screen (203), a water inlet pipe (204), an atomizing nozzle (205), a guide plate (206), a heating plate (207), a placement plate (208), an exhaust pipe (209), a water pump (210) and a water storage tank (211); A filter box (201) is fixedly connected to the side wall of the SCR reactor housing (1), an air intake pipe (202) is fixedly connected to the interior of the filter box (201), a filter screen (203) is fixedly connected to the interior of the filter box (201), a water inlet pipe (204) runs through the interior of the SCR reactor housing (1), an atomizing nozzle (205) is fixedly connected to the top of the water inlet pipe (204), and a guide plate (206) is fixedly connected to the inner wall of the SCR reactor housing (1) and located above the atomizing nozzle (205). A heating plate (207) is provided on the inner wall of the SCR reactor housing (1) and located below the guide plate (206); a placement plate (208) is provided inside the SCR reactor housing (1) and located below the heating plate (207) and is slidably connected; an exhaust pipe (209) is fixedly connected to the side wall of the SCR reactor housing (1) and located below the placement plate (208); one end of the water inlet pipe (204) is connected to a water pump (210) via a flange; a water storage tank (211) is provided at the bottom end of the water pump (210).

2. According to claim 1, the special denitrification device for biomass boilers is characterized in that: the side wall of the SCR reactor shell (1) is provided with an adding mechanism (3), and the adding mechanism (3) includes a limit plate (301), a placement container (302), a handle (303), a baffle (304), a sealing block (305), a slide rail (306), a block (307), a pull rod (308), a pull plate (309), a spring assembly (310) and a slot (311).

3. The biomass boiler-specific denitrification device according to claim 2 is characterized in that: The interior of the SCR reactor housing (1) is fixedly connected to a limiting plate (301); the top of the placement plate (208) is fixedly connected to a placement container (302); the top of the placement plate (208) and the side of the placement container (302) are fixedly connected to a handle (303); the side wall of the SCR reactor housing (1) and the side of the placement plate (208) are screwed to a baffle (304); the side wall of the baffle (304) is fixedly connected to a sealing block (305); A slide rail (306) is fixedly connected to the side wall of the housing (1) and located above the baffle (304); a clamping block (307) is slidably connected to the outer wall of the slide rail (306); a pull rod (308) is fixedly connected to the top of the clamping block (307); a pull plate (309) is fixedly connected to the top of the pull rod (308); a spring assembly (310) is fixedly connected to the top of the clamping block (307) and located on the outer wall of the pull rod (308); and a clamping slot (311) is provided at the top of the baffle (304).

4. The biomass boiler-specific denitrification device according to claim 1 is characterized in that: The SCR reactor shell (1) is configured to have four layers, and each layer comprises a clay mineral layer, a polytetrafluoroethylene layer, a plant fiber material and a base layer.

5. The biomass boiler-specific denitrification device according to claim 1 is characterized in that: The filter screens (203) are provided in three groups, and the positions of the three groups of filter screens (203) are distributed in parallel along the inner wall of the filter box (201).

6. The biomass boiler-specific denitrification device according to claim 1 is characterized in that: The contact surface between the filter box (201) and the SCR reactor housing (1) is provided with a connection port, three groups of placement plates (208) are provided, and the interior of the placement plates (208) is in a hollow mesh shape.

7. The biomass boiler-specific denitrification device according to claim 1 is characterized in that: A water inlet is provided at the top of the water storage tank (211), and the side surface of the guide plate (206) is in an arc shape.

8. The biomass boiler-specific denitrification device according to claim 3 is characterized in that: The sealing block (305) is made of rubber, and the clamping block (307) forms a sliding structure with the slide rail (306) through a pull rod (308) and a spring assembly (310).

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