SCR (Selective Catalytic Reduction) denitration device under easily-coked and blocked environment

Abstract

The utility model relates to the field of SCR (Selective Catalytic Reduction) denitration, in particular to an SCR denitration device in an easy-to-coke and easy-to-block environment, which comprises a shunting box, the device further comprises a driving motor, a screw rod, a moving seat, a baffle, a mounting seat, a pressure sensor and a controller, a top cover is arranged on the surface of the top of the flow dividing box, and two symmetrical through holes are formed in the upper surface of the top cover. By arranging the pressure sensor, the flue gas flowing pressure in the SCR reactor can be monitored in real time during working, if a catalytic structure in the SCR reactor is blocked, the pressure of gas flow is correspondingly reduced, and when the pressure is smaller than a threshold value, the driving motor is controlled by the controller to operate, so that the screw rod is driven to rotate, and the flow of the gas flow is reduced. The screw rod can drive the moving seat and the gear handle to move when rotating, so that the baffle plate is moved to the position of the corresponding through hole of the blocked SCR reactor, flue gas flows through the other SCR reactor, and the purpose of automatically regulating and controlling the two flow channels is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of SCR denitration, especially to the SCR denitration device under the environment of easy coking and blockage. BACKGROUND

[0002] SCR denitration device is a kind of selective catalytic reduction method, for reducing the nitrogen oxides discharged by coal-fired power plant and industrial boiler, and SCR technology is injected ammonia gas or urea solution into flue gas under the action of catalyst, so that nitrogen oxides are reduced to nitrogen and water vapor on catalyst, thereby reducing the emission of nitrogen oxides.

[0003] The existing SCR denitration device is usually used in the way of double flow channel to carry out the operation of removing the plug when not stopping the machine to clean ash, but lacks the automatic adjusting structure of double flow channel, when the flow channel on one side is blocked, it cannot automatically adjust the flue gas to flow from another flow channel.

[0004] Therefore, in view of the above-mentioned problems of the existing SCR denitration device, which is usually used in the way of double flow channel to carry out the operation of removing the plug when not stopping the machine to clean ash, but lacks the automatic adjusting structure of double flow channel, when the flow channel on one side is blocked, it cannot automatically adjust the flue gas to flow from another flow channel, the SCR denitration device under the environment of easy coking and blockage can be designed, by setting a pressure sensor with model PY301, which can monitor the flue gas flow pressure inside the SCR reactor in real time when working, if the catalytic structure inside the SCR reactor is blocked, the pressure of airflow will correspondingly decrease, when the pressure is less than the threshold value, the controller will control the driving motor to work, thereby driving the screw to rotate, the screw can drive the moving seat and the shutter to move when rotating, so as to move the shutter to the position of the through hole corresponding to the blocked SCR reactor, so that the flue gas flows through another SCR reactor, thereby achieving the purpose of automatically adjusting two flow channels. SUMMARY

[0005] In order to overcome the problem that the existing SCR denitration device is usually used in the way of double flow channel to carry out the operation of removing the plug when not stopping the machine to clean ash, but lacks the automatic adjusting structure of double flow channel, when the flow channel on one side is blocked, it cannot automatically adjust the flue gas to flow from another flow channel.

[0006] The utility model discloses a technical scheme for: the SCR denitration device under the environment of easy coking and blockage, comprising a flow divider, further comprising a drive motor, screw rod, mobile seat, baffle, mounting seat, pressure sensor and controller, the top surface of flow divider is provided with the top cover, the upper surface of top cover is provided with two symmetrical through -hole, the upper surface of top cover is installed with the SCR reactor at the position of through -hole, the right side surface of flow divider is provided with drive motor at the rear position, and one end of the screw rod is connected with the output of drive motor and penetrates the right side wall of flow divider, and the other end of screw rod is rotatably connected with the left side of the inner surface of flow divider, and the outer surface of screw rod is penetrated and is connected with mobile seat, and the front side surface of mobile seat is provided with baffle, and the front side surface of two SCR reactors is provided with mounting seat at the upper position, and the upper surface of mounting seat is provided with pressure sensor, and the front side surface of flow divider is provided with controller at the middle position, and the controller is electrically connected with pressure sensor and drive motor, and the bottom surface of flow divider is provided with air inlet pipe at the middle position.

[0007] Preferably, the pressure sensor is set to model PY301, which can monitor the flue gas flow pressure inside the SCR reactor in real time during work. If the catalytic structure inside the SCR reactor is blocked, the pressure of the airflow will decrease accordingly. When the pressure is less than the threshold value, the drive motor will be controlled by the controller to operate, thereby driving the screw rod to rotate. The screw rod can drive the mobile seat and the baffle to move when rotating, thereby moving the baffle to the position of the through -hole corresponding to the blocked SCR reactor, so that the flue gas flows through the other SCR reactor. This realizes the automatic regulation of the two flow channels and solves the problem that the existing SCR denitration device usually adopts a double -flow channel mode for desulfurization operation to realize non -stop dust removal, but lacks an automatic adjustment structure for the double -flow channel. When the flow channel on one side is blocked, the flue gas cannot automatically flow through the other flow channel.

[0008] Preferably, the front side surface of the baffle is provided with a limiting block, and the inner surface of the flow divider is provided with a limiting rod at the upper position on the left and right sides. The limiting block and the limiting rod are connected through sliding.

[0009] Preferably, a fixed plate is arranged on the inner surface of the flow divider at the lower side of the screw rod, two symmetrical fixed screws are arranged on the front side surface of the fixed plate at the lower position, the fixed plate is fixed to the flow divider through the fixed screws, and a protective plate is arranged on the front side surface of the fixed plate.

[0010] Preferably, indicator lights are arranged on the front side surface of the flow divider at positions corresponding to the two SCR reactors, and the indicator lights are electrically connected with the controller.

[0011] As preferred, flanges are arranged on the top surfaces of the two SCR reactors and the port positions of the gas inlet pipe, the two SCR reactors are connected with the external gas outlet pipe through the flanges, and the gas inlet pipe is connected with the external boiler flue through the flanges.

[0012] As preferred, sealing rings are arranged on the lower positions of the outer surfaces of the two SCR reactors and the upper positions of the outer surfaces of the gas inlet pipe, and the sealing rings are adhered to the shunt box through sealing glue.

[0013] As preferred, the rear surface of the moving seat is slidably attached to the rear inner surface of the shunt box, and the protective plate is made of Teflon material.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. The pressure sensor PY301 is arranged to monitor the flue gas flow pressure in the SCR reactor in real time during work. If the catalytic structure in the SCR reactor is blocked, the pressure of the airflow will decrease accordingly. When the pressure is less than the threshold value, the controller will control the driving motor to operate, thereby driving the screw to rotate. The screw can drive the moving seat and the handle to move when rotating, thereby moving the baffle to the corresponding hole position of the blocked SCR reactor, so that the flue gas flows through another SCR reactor. In this way, the purpose of automatically adjusting two flow channels is achieved. The existing SCR denitration device usually adopts a double-flow channel mode for denitration operation without stopping for cleaning. However, there is a lack of automatic adjustment structure for the double-flow channel. When the flow channel on one side is blocked, the flue gas cannot automatically flow through the other flow channel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The SCR denitration device under the easy coking and blocking environment is shown in the three-dimensional structure schematic view.

[0017] Figure 2 The shunt box of the SCR denitration device under the easy coking and blocking environment is shown in the three-dimensional structure schematic view.

[0018] Figure 3 The internal structure of the shunt box of the SCR denitration device under the easy coking and blocking environment is shown in the three-dimensional structure schematic view.

[0019] Figure 4 The baffle of the SCR denitration device under the easy coking and blocking environment is shown in the three-dimensional structure schematic view.

[0020] Explanation of reference signs: 1, flow divider box; 2, top cover; 3, through hole; 4, SCR reactor; 5, driving motor; 6, screw rod; 7, moving seat; 8, baffle; 9, limiting block; 10, limiting rod; 11, fixed plate; 12, fixing screw; 13, protective plate; 14, mounting seat; 15, pressure sensor; 16, controller; 17, indicator light; 18, air inlet pipe; 19, flange plate; 20, sealing ring. DETAILED DESCRIPTION

[0021] The utility model is further explained below in combination with the drawings and examples.

[0022] Please refer to Figures 1-4 The utility model provides a kind of embodiment: SCR denitration device under easy coking and jamming environment, including flow divider box 1;Still including driving motor 5, screw rod 6, moving seat 7, baffle 8, mounting seat 14, pressure sensor 15 and controller 16, the top surface of flow divider box 1 is provided with top cover 2, the upper surface of top cover 2 is equipped with two symmetrical through holes 3, the upper surface of top cover 2 is installed with SCR reactor 4 corresponding the position of through hole 3, the right side surface of flow divider box 1 is set to driving motor 5 in rear position, the output end of driving motor 5 is connected with one end of screw rod 6 penetrating the right side wall of flow divider box 1, the other end of screw rod 6 is rotatably connected with the inner surface left side of flow divider box 1, the outer surface of screw rod 6 is penetrated and is connected with moving seat 7 with screw thread, the front side surface of moving seat 7 is provided with baffle 8, the front side surface of two SCR reactors 4 is set to mounting seat 14 in upper position, the upper surface of mounting seat 14 is provided with pressure sensor 15, the front side surface of flow divider box 1 is set to controller 16 in middle position, controller 16 and pressure sensor 15 and driving motor 5 are electrically connected, the bottom surface of flow divider box 1 is set to air inlet pipe 18 in middle position, by setting pressure sensor 15, its model is PY301, can be monitored in real time to the flue gas flow pressure inside SCR reactor 4 when working, if the catalytic structure inside SCR reactor 4 appears jam, the pressure of airflow will correspondingly decrease, when pressure is less than threshold value, will be operated by controller 16 control driving motor 5, to drive screw rod 6 to rotate, screw rod 6 can drive moving seat 7 and baffle to move when rotating, so that baffle 8 is moved to the position of through hole 3 corresponding to jammed SCR reactor 4, so that flue gas flows from another SCR reactor 4, to realize the purpose of automatic regulation and control of two flow passages.

[0023] Please refer to Figures 1-4In the embodiment, the front side surface of the baffle plate 8 is provided with a limiting block 9, the inner surface of the distribution box 1 is provided with a limiting rod 10 on the left and right sides and at the upper position, the limiting block 9 is in sliding connection with the limiting rod 10 in penetration, through the limiting rod 10 and the limiting block 9, when the baffle plate 8 moves, the limiting block 9 can be driven to slide synchronously on the outer surface of the limiting rod 10, and the limiting rod 10 can limit the sliding direction of the limiting block 9, so as to improve the stability of the movement of the baffle plate 8, the rear side of the inner surface of the distribution box 1 is located below the screw rod 6 and is provided with a fixed plate 11, the front side surface of the fixed plate 11 is provided with two symmetrical fixed screws 12 at the lower position, the fixed plate 11 is fixed with the distribution box 1 through the fixed screws 12, the front side surface of the fixed plate 11 is provided with a protective plate 13, through the protective plate 13, the screw rod 6 can be protected, direct impact of flue gas on the screw rod 6 is avoided, and the service life of the equipment is improved, the front side surface of the distribution box 1 is provided with an indicating lamp 17 corresponding to the position of the two SCR reactors 4, the indicating lamp 17 is electrically connected with the controller 16, through the indicating lamp 17, when the operation is normal, the indicating lamp 17 shines green light, when one of the SCR reactors 4 is blocked, the corresponding indicating lamp 17 shines red light, so as to remind the staff to clean the ash in time.

[0024] Please refer to Figures 1-4 In the embodiment, the top surface of the two SCR reactors 4 and the port position of the air inlet pipe 18 are both provided with flanges 19, the two SCR reactors 4 are connected with the external air outlet pipe through the flanges 19, the air inlet pipe 18 is connected with the external boiler flue through the flanges 19, through the flanges 19, the two SCR reactors 4 and the air inlet pipe 18 can be conveniently connected with the external pipeline, at the same time, high connection strength can be ensured, and the stability of the whole device is improved, the outer surface of the two SCR reactors 4 is provided with a sealing ring 20 at the lower position, and the outer surface of the air inlet pipe 18 is provided with a sealing ring 20 at the upper position, the sealing ring 20 is adhered between the distribution box 1, through the sealing ring 20, the connection gap between the two SCR reactors 4 and the air inlet pipe 18 and the distribution box 1 can be sealed, internal flue gas escaping to damage the health of the staff is avoided, and the safety of the device is improved, the rear side surface of the moving seat 7 is in sliding fit with the rear side of the inner surface of the distribution box 1, the protective plate 13 is made of Teflon, through the sliding fit of the moving seat 7 and the inner surface of the distribution box 1, synchronous rotation of the moving seat 7 driven by the screw rod 6 during rotation is avoided, the transmission efficiency is improved, and through the adoption of Teflon for the protective plate 13, the protective plate 13 has good corrosion resistance, so as to reduce the damage of flue gas to the protective plate 13.

[0025] When working, by setting the limiting rod 10 and the limiting block 9, when the baffle plate 8 moves, the limiting block 9 can be driven to slide synchronously on the outer surface of the limiting rod 10, and the limiting rod 10 can limit the sliding direction of the limiting block 9, thereby improving the stability of the movement of the baffle plate 8. By setting the protective plate 13, the screw rod 6 can be protected, avoiding direct impact of the flue gas on the screw rod 6, thereby prolonging the service life of the equipment. By setting the indicator light 17, when working normally, the indicator light 17 lights up green, and when one of the SCR reactors 4 is blocked, the corresponding indicator light 17 will light up red, thereby reminding the staff to clean the dust in time. By setting the flange plate 19, the two SCR reactors 4 and the air inlet pipe 18 can be conveniently connected with the external pipeline, while ensuring high connection strength and improving the stability of the device as a whole. By setting the sealing ring 20, the connection gap between the two SCR reactors 4 and the air inlet pipe 18 and the distribution box 1 can be sealed, avoiding internal flue gas escape to damage the health of the staff, thereby improving the safety of the device. By bonding the moving seat 7 with the inner surface of the distribution box 1, the moving seat 7 can be prevented from rotating synchronously with the screw rod 6 during rotation, thereby improving the transmission efficiency. Moreover, by using Teflon to make the protective plate 13, the protective plate 13 can have good corrosion resistance, thereby reducing damage of the flue gas to the protective plate 13.

[0026] Through the above steps, by setting the pressure sensor 15, which is model PY301, the flue gas flow pressure inside the SCR reactor 4 can be monitored in real time during work. If the catalytic structure inside the SCR reactor 4 is blocked, the pressure of the airflow will correspondingly decrease. When the pressure is less than the threshold value, the controller 16 will control the driving motor 5 to operate, thereby driving the screw rod 6 to rotate. The screw rod 6 can drive the moving seat 7 and the handle to move when rotating, thereby moving the baffle plate 8 to the position of the corresponding through hole 3 of the blocked SCR reactor 4, so that the flue gas flows from the other SCR reactor 4. In this way, the purpose of automatically adjusting the two flow channels is achieved. In this way, the problem that the existing SCR denitration device usually adopts a double-flow channel mode for denitration operation without stopping for cleaning when in use, but lacks an automatic adjustment structure for the double-flow channel, and when the flow channel on one side is blocked, the flue gas cannot automatically flow from the other flow channel is solved.

Claims

1. SCR denitration device in easy coking and plugging environment, comprising a flow divider box (1); characterized in that: The utility model also includes drive motor (5), screw rod (6), moving seat (7), baffle (8), mounting seat (14), pressure sensor (15) and controller (16), the top surface of split box (1) is provided with top cover (2), the upper surface of top cover (2) is opened with two symmetrical through -hole (3), the upper surface of top cover (2) is installed with SCR reactor (4) correspondingly through -hole (3) position, the right side surface of split box (1) is provided with drive motor (5) behind position, the output of drive motor (5) is connected with the one end of screw rod (6) through the right side wall of split box (1), the other end of screw rod (6) is rotatably connected with the inner surface left side of split box (1), the outer surface of screw rod (6) is connected with moving seat (7) through screw thread, the front side surface of moving seat (7) is provided with baffle (8), the front side surface of two SCR reactor (4) is provided with mounting seat (14) above position, the upper surface of mounting seat (14) is provided with pressure sensor (15), the front side surface of split box (1) is provided with controller (16) in the middle position, controller (16) is electrically connected with pressure sensor (15) and drive motor (5), the bottom surface of split box (1) is provided with air inlet pipe (18) in the middle position.

2. The SCR De-NOx device in an easy-coking and plugging environment according to claim 1, characterized in that: The front side surface of baffle (8) is provided with limit block (9), the inner surface left and right sides of split box (1) are provided with limit rod (10) above position, limit block (9) and limit rod (10) are connected through sliding. 3.The SCR De-NOx device in an easy-coking and easy-plugging environment according to claim 1, characterized in that: The inner surface rear side of split box (1) is provided with fixed plate (11) below screw rod (6), the front side surface of fixed plate (11) is provided with two symmetrical fixed screws (12) below position, fixed plate (11) is fixed with split box (1) through fixed screw (12), the front side surface of fixed plate (11) is provided with protection plate (13).

4. The SCR De-NOx device in an easy-coking and plugging environment according to claim 1, characterized in that: The front side surface of split box (1) is provided with indicating lamp (17) correspondingly two SCR reactor (4) position, indicating lamp (17) is electrically connected with controller (16).

5. The SCR De-NOx device in an easy-coking and plugging environment according to claim 1, characterized in that: The top surface of two SCR reactor (4) and the port position of air inlet pipe (18) are provided with flange plate (19), two SCR reactor (4) are connected with external air outlet pipe through flange plate (19), air inlet pipe (18) is connected with external boiler flue through flange plate (19). 6.The SCR De-NOx device in an easy-coking and easy-plugging environment according to claim 1, characterized in that: The outer surface below position of two SCR reactor (4) and the outer surface above position of air inlet pipe (18) are provided with sealing ring (20), sealing ring (20) and split box (1) are connected through sealing glue.

7. The SCR De-NOx device in an easy-coking and plugging environment according to claim 3, characterized in that: The rear side surface of moving seat (7) and the inner surface rear side of split box (1) are pasted and slide, protection plate (13) is Teflon material.

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