SCR Denitrification Equipment

Abstract

The utility model discloses an SCR denitration device, which belongs to the technical field of waste gas treatment. The utility model comprises a mixing box and a catalytic box, wherein the mixing box and the catalytic box are fixedly connected and communicated with each other, a preheating box is fixedly connected to one side end of the mixing box, and the preheating box is communicated with the mixing box, an air inlet is fixedly connected to the preheating box, and the air inlet is communicated with the preheating box, an ammonia water pipe is fixedly connected in the mixing box, and one end of the ammonia water pipe penetrates to the outside of the mixing box, a plurality of nozzles are fixedly connected to the ammonia water pipe, and the plurality of nozzles are all communicated with the ammonia water pipe, a mixer is fixedly connected in the mixing box, and the mixer corresponds to the nozzles, a rectifier heater and a plurality of catalysts are sequentially arranged in the catalytic box from top to bottom, a discharge port is fixedly connected to the bottom end of the catalytic box, and the discharge port is communicated with the catalytic box; the equipment accelerates the flow speed of the ammonia water and the flue gas while ensuring the mixing effect of the ammonia water and the flue gas, thereby improving the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, and more specifically to an SCR denitration device. Background Art

[0002] Selective catalytic reduction (SCR) technology is a technology in which the reducing agent NH3 (liquid, ammonia water, urea, etc.) reacts with NOX in the flue gas under the action of a catalyst to reduce NOX in the flue gas to non-toxic and non-polluting nitrogen N2 and water H20o. The reactor is located between the boiler economizer outlet and the air preheater inlet. The reaction temperature is generally between 320℃-400℃. SCR denitrification technology is currently a mature and reliable denitrification technology with high denitrification efficiency.

[0003] At present, when SCR denitrification equipment purifies flue gas, it first mixes ammonia water with the flue gas, then heats the mixed flue gas through a heater, and finally generates nitrogen and water through a catalyst to complete denitrification. However, most of the existing SCR denitrification equipment usually uses a single mixer to mix the flue gas and ammonia water when purifying the flue gas. When the mixer mixes the flue gas and ammonia water, the flue gas flow rate entering the SCR denitrification equipment is usually slow in order to mix them evenly. Increasing the flue gas flow rate will cause uneven mixing of the flue gas and ammonia water, resulting in low overall working efficiency. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an SCR denitrification device, aiming to solve the problem that most of the SCR denitrification devices in the prior art usually use a single mixer to mix the flue gas and ammonia water when purifying the flue gas. In order to mix the flue gas and ammonia water evenly, the flue gas flow rate entering the SCR denitrification device is usually slow. Increasing the flue gas flow rate will cause uneven mixing of the flue gas and ammonia water, resulting in low overall working efficiency.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] The SCR denitration device comprises a mixing box and a catalytic box, wherein the mixing box and the catalytic box are fixedly connected and communicate with each other, a preheating box is fixedly connected to one side end of the mixing box, and the preheating box communicates with the mixing box, an air inlet is fixedly connected to the preheating box, and the air inlet communicates with the preheating box, an ammonia water pipe is fixedly connected in the mixing box, and one end of the ammonia water pipe passes through the outside of the mixing box, a plurality of nozzles are fixedly connected to the ammonia water pipe, and the plurality of nozzles are all communicated with the ammonia water pipe, a mixer is fixedly connected in the mixing box, and the mixer corresponds to the nozzle, and the catalyst box A rectifying heater and a plurality of catalysts are sequentially arranged from top to bottom, a discharge port is fixedly connected to the bottom end of the catalyst box, and the discharge port is communicated with the catalyst box, a mixing mechanism is arranged in the mixing box, and the mixing mechanism is located between a plurality of nozzles and the mixer to accelerate the flow and mixing of ammonia water and flue gas, an acceleration mechanism is arranged in the mixing box and the catalyst box, and the acceleration mechanism is located on the upper side of the mixer and corresponds to the catalyst box to accelerate the flow speed of the flue gas after mixing, and a driving mechanism is arranged on the mixing box, and the driving mechanism corresponds to the mixing mechanism and the acceleration mechanism to control the start-up of the mixing mechanism and the acceleration mechanism.

[0009] As a preferred solution of the utility model, the mixing mechanism includes a mixing shell and two mixing blades. The mixing shell is fixedly connected to the mixing box and is located between the mixer and the multiple nozzles. The two mixing blades are rotatably connected to the mixing shell.

[0010] As a preferred solution of the utility model, the acceleration mechanism includes a guide shell, an output port and guide blades. The guide shell is fixedly connected to the mixing box. The output port is fixedly connected to the guide shell, and the output port is connected to the guide shell and penetrates into the catalyst box. The guide blades are rotatably connected to the guide shell and correspond to the mixer.

[0011] As a preferred solution of the utility model, the driving mechanism includes a driving motor, a rotating rod, two worm gears and a worm, the driving motor is fixedly connected to the top of the mixing box, the rotating rod is fixedly connected to the output end of the driving motor and is fixedly connected to the guide vane, and the rotating rod is located in the mixing box and moves from top to bottom in sequence through the guide vane and the mixer, the two worm gears are fixedly connected to the two output ports respectively, the worm is fixedly connected to the bottom end of the rotating rod, and the worm is meshed with the two worm gears.

[0012] As a preferred solution of the utility model, a first guide plate is fixedly connected in the mixing box, and the first guide plate corresponds to the preheating box, and a second guide plate is fixedly connected in the catalytic box, and the second guide plate corresponds to the output port.

[0013] As a preferred solution of the utility model, the bottom end of the mixing box is fixedly connected with a collecting port, and the collecting port is communicated with the mixing box, and the bottom end of the collecting port is detachably connected with a collecting tank, and the collecting tank is communicated with the collecting port.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] 1) In this scheme, during the process of flue gas denitrification, the driving mechanism controls the starting of the mixing mechanism and the accelerating mechanism, the mixing mechanism cooperates with the mixer to accelerate the mixing of ammonia water and flue gas, improves the mixing effect, and ensures the uniformity of the mixing of ammonia water and flue gas. The mixing mechanism cooperates with the accelerating mechanism to control the flow rate of the flue gas after mixing with ammonia water, thereby improving the working efficiency of flue gas denitrification; In the utility model, the equipment accelerates the flow rate of ammonia water and flue gas while ensuring the mixing effect of ammonia water and flue gas, thereby improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of some structures in the utility model;

[0020] Figure 4 For the utility model Figure 3 Exploded diagram.

[0021] Description of the numbers in the figure:

[0022] 1. Mixing box; 2. Catalytic box; 3. Preheating box; 4. Air inlet; 5. Ammonia pipe; 6. Nozzle; 7. Mixer; 8. Rectifier heater; 9. Catalyst; 10. Exhaust port; 111. Mixing shell; 112. Mixing blade; 121. Guide shell; 122. Output port; 123. Guide blade; 131. Drive motor; 132. Rotating rod; 133. Worm gear; 134. Worm; 14. First guide plate; 15. Second guide plate; 16. Collection port; 17. Collection tank. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings 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.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Example:

[0027] See also Figure 1-4 The SCR denitration device includes a mixing box 1 and a catalytic box 2, wherein the mixing box 1 and the catalytic box 2 are fixedly connected and connected to each other, a preheating box 3 is fixedly connected to one side end of the mixing box 1, and the preheating box 3 is connected to the mixing box 1, an air inlet 4 is fixedly connected to the preheating box 3, and the air inlet 4 is connected to the preheating box 3, an ammonia water pipe 5 is fixedly connected to the mixing box 1, and one end of the ammonia water pipe 5 passes through the outside of the mixing box 1, a plurality of nozzles 6 are fixedly connected to the ammonia water pipe 5, and the plurality of nozzles 6 are connected to the ammonia water pipe 5, a mixer 7 is fixedly connected to the mixing box 1, and the mixer 7 corresponds to the nozzle 6 A rectifier heater 8 and a plurality of catalysts 9 are sequentially arranged in the catalyst box 2 from top to bottom. An exhaust port 10 is fixedly connected to the bottom end of the catalyst box 2, and the exhaust port 10 is connected to the catalyst box 2. A mixing mechanism is arranged in the mixing box 1. The mixing mechanism is located between the plurality of nozzles 6 and the mixer 7 to accelerate the flow and mixing of ammonia water and flue gas. An acceleration mechanism is arranged in the mixing box 1 and the catalyst box 2. The acceleration mechanism is located on the upper side of the mixer 7 and corresponds to the catalyst box 2 to accelerate the flow speed of the flue gas after mixing. A driving mechanism is arranged on the mixing box 1. The driving mechanism corresponds to the mixing mechanism and the acceleration mechanism to control the start-up of the mixing mechanism and the acceleration mechanism.

[0028] In this embodiment, the flue gas enters the preheating box 3 through the air inlet 4 for preheating, and the preheated flue gas enters the mixing box 1. The ammonia pipe 5 is connected to the ammonia water source, and ammonia is sprayed through multiple nozzles 6. The driving mechanism controls the mixing mechanism and the acceleration mechanism to start. The mixing mechanism accelerates the mixing of ammonia and flue gas, and at the same time accelerates the flow rate of the flue gas and ammonia, so that the ammonia and flue gas enter the mixer 7 for secondary mixing to improve the mixing effect. The mixed flue gas and ammonia increase the conveying speed of the flue gas through the acceleration mechanism, so that the flue gas flows quickly into the catalyst box 2, and the rectifier heater 8 heats the incoming flue gas. The heated flue gas generates nitrogen and water through multiple catalysts 9, and is finally discharged through the exhaust port 10 to complete SCR denitrification.

[0029] Specifically, the mixing mechanism includes a mixing shell 111 and two mixing blades 112 . The mixing shell 111 is fixedly connected to the mixing box 1 , and the mixing shell 111 is located between the mixer 7 and the plurality of nozzles 6 . The two mixing blades 112 are both rotatably connected to the mixing shell 111 .

[0030] In this embodiment, the flue gas and the ammonia solution are mixed in the mixing shell 111, and the driving mechanism controls the two mixing blades 112 to rotate. The two mixing blades 112 rotate to accelerate the mixing of the flue gas in the mixing shell 111 and, at the same time, increase the flow rate of the flue gas and the ammonia solution.

[0031] Specifically, the acceleration mechanism includes a guide shell 121, an output port 122 and a guide vane 123. The guide shell 121 is fixedly connected to the mixing box 1. The output port 122 is fixedly connected to the guide shell 121, and the output port 122 is connected to the guide shell 121 and extends into the catalyst box 2. The guide vane 123 is rotatably connected to the guide shell 121 and corresponds to the mixer 7.

[0032] In this embodiment, the driving mechanism controls the guide vane 123 to rotate in the guide housing 121. After the flue gas and ammonia water are mixed by the mixer 7, the guide vane 123 sucks the flue gas mixed with ammonia water, so that the flue gas mixed with ammonia water quickly enters the catalyst box 2 through the output port 122 for treatment.

[0033] Specifically, the driving mechanism includes a driving motor 131, a rotating rod 132, two worm gears 133 and a worm 134. The driving motor 131 is fixedly connected to the top of the mixing box 1, the rotating rod 132 is fixedly connected to the output end of the driving motor 131 and is fixedly connected to the guide vane 123, and the rotating rod 132 is located in the mixing box 1 and moves from top to bottom in sequence through the guide vane 123 and the mixer 7. The two worm gears 133 are respectively fixedly connected to the two output ports 122, and the worm 134 is fixedly connected to the bottom end of the rotating rod 132, and the worm 134 is meshed with the two worm gears 133.

[0034] In this embodiment, the driving motor 131 is started by an external power supply to control the rotation of the rotating rod 132, and the rotating rod 132 drives the guide blades 123 and the worm 134 to rotate. The rotation of the guide blades 123 accelerates the transportation of the flue gas mixed with ammonia water. The rotation of the worm 134 drives the two worm gears 133 to rotate, so that the two worm gears 133 drive the mixing blades 112 to rotate, thereby accelerating the mixing of the flue gas and ammonia water, and at the same time increasing the flow rate of the flue gas and ammonia water when mixed.

[0035] Specifically, a first guide plate 14 is fixedly connected in the mixing box 1 , and the first guide plate 14 corresponds to the preheating box 3 , and a second guide plate 15 is fixedly connected in the catalytic box 2 , and the second guide plate 15 corresponds to the output port 122 .

[0036] In this embodiment, the first guide plate 14 and the second guide plate 15 control the conveying direction of the flue gas so that the flue gas maintains a stable flow path during denitration.

[0037] Specifically, the bottom end of the mixing box 1 is fixedly connected with a collecting port 16 , and the collecting port 16 is communicated with the mixing box 1 . The bottom end of the collecting port 16 is detachably connected with a collecting tank 17 , and the collecting tank 17 is communicated with the collecting port 16 .

[0038] In this embodiment, some large particles of ammonia water that are difficult to mix with the flue gas will flow into the collection tank 17 through the collection port 16, and the ammonia water will be collected by the collection tank 17, thereby reducing the waste of ammonia water.

[0039] Working principle: the flue gas enters the preheating box 3 through the air inlet 4 for preheating, and the preheated flue gas enters the mixing box 1. The ammonia water pipe 5 is connected to the ammonia water source, and the ammonia water is sprayed through multiple nozzles 6. The driving motor 131 is started by an external power supply to control the rotation of the rotating rod 132, and the rotating rod 132 drives the guide blade 123 and the worm 134 to rotate. The flue gas and the ammonia water are mixed in the mixing shell 111, and the worm 134 rotates to drive the two worm gears 133 to rotate, so that the two worm gears 133 drive the mixing blades 112 to rotate. During the rotation of the two mixing blades 112, the flue gas is accelerated in the mixing shell. 111 is mixed, and at the same time, the flow rate of the flue gas and ammonia water is increased, so that the ammonia water and the flue gas quickly enter the mixer 7 for secondary mixing to improve the mixing effect. The rotating rod 132 controls the guide vane 123 to rotate in the guide shell 121. After the flue gas and ammonia water are mixed by the mixer 7, the guide vane 123 sucks the flue gas mixed with ammonia water, so that the flue gas mixed with ammonia water quickly enters the catalyst box 2 through the output port 122. The rectifier heater 8 heats the incoming flue gas, and the heated flue gas generates nitrogen and water through multiple catalysts 9, and is finally discharged through the exhaust port 10 to complete SCR denitrification.

[0040] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. An SCR denitration device, comprising a mixing box (1) and a catalyst box (2), characterized in that: The mixing box (1) and the catalytic box (2) are fixedly connected and interlinked with each other. A preheating box (3) is fixedly connected to one side end of the mixing box (1), and the preheating box (3) is interlinked with the mixing box (1). An air inlet (4) is fixedly connected to the preheating box (3), and the air inlet (4) is interlinked with the preheating box (3). An ammonia water pipe (5) is fixedly connected to the mixing box (1), and one end of the ammonia water pipe (5) extends to the outside of the mixing box (1). A plurality of nozzles (6) are fixedly connected to the ammonia water pipe (5), and the plurality of nozzles (6) are all interlinked with the ammonia water pipe (5). A mixer (7) is fixedly connected to the mixing box (1), and the mixer (7) corresponds to the nozzle (6). A rectifying heater (8) and a plurality of catalysts (9) are arranged in sequence from top to bottom in the catalyst box (2); a discharge port (10) is fixedly connected to the bottom end of the catalyst box (2), and the discharge port (10) is connected to the catalyst box (2); a mixing mechanism is arranged in the mixing box (1); the mixing mechanism is located between the plurality of nozzles (6) and the mixer (7) to accelerate the flow and mixing of ammonia water and flue gas; an acceleration mechanism is arranged in the mixing box (1) and the catalyst box (2); the acceleration mechanism is located on the upper side of the mixer (7) and corresponds to the catalyst box (2) to accelerate the flow speed of the flue gas after mixing; a driving mechanism is arranged on the mixing box (1); the driving mechanism corresponds to the mixing mechanism and the acceleration mechanism to control the start of the mixing mechanism and the acceleration mechanism.

2. The SCR denitration equipment according to claim 1, characterized in that: The mixing mechanism comprises a mixing shell (111) and two mixing blades (112); the mixing shell (111) is fixedly connected to the mixing box (1), and the mixing shell (111) is located between the mixer (7) and the plurality of nozzles (6); and the two mixing blades (112) are rotatably connected to the mixing shell (111).

3. The SCR denitration equipment according to claim 2, characterized in that: The acceleration mechanism comprises a flow guide housing (121), an output port (122) and a flow guide vane (123); the flow guide housing (121) is fixedly connected to the mixing box (1); the output port (122) is fixedly connected to the flow guide housing (121); the output port (122) is connected to the flow guide housing (121) and penetrates into the catalytic box (2); the flow guide vane (123) is rotatably connected to the flow guide housing (121) and corresponds to the mixer (7).

4. The SCR denitration equipment according to claim 3, characterized in that: The driving mechanism comprises a driving motor (131), a rotating rod (132), two worm wheels (133) and a worm (134); the driving motor (131) is fixedly connected to the top end of the mixing box (1); the rotating rod (132) is fixedly connected to the output end of the driving motor (131) and is fixedly connected to the guide vane (123); the rotating rod (132) is located in the mixing box (1) and moves from top to bottom to pass through the guide vane (123) and the mixer (7); the two worm wheels (133) are respectively fixedly connected to the two output ports (122); the worm (134) is fixedly connected to the bottom end of the rotating rod (132); and the worm (134) is meshed with the two worm wheels (133).

5. The SCR denitration equipment according to claim 4, characterized in that: A first guide plate (14) is fixedly connected inside the mixing box (1), and the first guide plate (14) corresponds to the preheating box (3); a second guide plate (15) is fixedly connected inside the catalytic box (2), and the second guide plate (15) corresponds to the output port (122).

6. The SCR denitration equipment according to claim 5, characterized in that: The bottom end of the mixing box (1) is fixedly connected to a collecting port (16), and the collecting port (16) is in communication with the mixing box (1); the bottom end of the collecting port (16) is detachably connected to a collecting tank (17), and the collecting tank (17) is in communication with the collecting port (16).

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