Flue gas denitration treatment device of garbage incinerator

Abstract

The utility model discloses a flue gas denitration treatment device of a garbage incinerator. The flue gas denitration treatment device comprises a movable denitration liquid storage box located outside a flue, and one side of the denitration liquid storage box is provided with a first rotating pipe extending into the flue and a first driving assembly driving the first rotating pipe to rotate; the first rotating pipe is provided with a telescopic pipe distributed in the length direction of the flue and a second driving assembly driving the telescopic pipe to stretch out and draw back, the telescopic pipe is provided with a temperature sensor, a flow sensor, a second rotating pipe and a third driving assembly driving the second rotating pipe to rotate, and the second rotating pipe is provided with a plurality of spraying heads in the circumferential direction. And a rotating blade is arranged at the end part of the second rotating pipe. The denitration device has the characteristics that the denitration position can be adjusted, and the denitration reaction is improved.

Description

Technical Field

[0001] The utility model relates to a garbage incinerator device, in particular to a flue gas denitration treatment device for a garbage incinerator. Background Art

[0002] The selective non-catalytic reduction (SNCR) denitration system is a technology used to reduce the emission of nitrogen oxides in the flue gas generated during the combustion process of a garbage incinerator. This technology promotes the chemical reaction between NOx in the flue gas and the reducing agent in a specific temperature range by injecting the reducing agent into the high-temperature flue gas without a catalyst, generating nitrogen and water, so as to achieve the purpose of denitration, thereby reducing the emission of environmental pollutants during the combustion process of the garbage incinerator and being beneficial to environmental protection.

[0003] In the existing SNCR denitration system, the flue gas generated by combustion first passes through the boiler and flue to the SNCR denitration system. The spray guns of the SNCR denitration system are evenly distributed around the upper part of the furnace wall. During the transmission of the flue gas, the spray guns inject the reducing agent into the flue gas for denitration. The positions of the spray guns are fixed, the spraying ranges are fixed, and the contact area with the flue gas is limited. When the flue gas flow changes, the denitration reaction is not sufficient; moreover, the temperature range where the spray guns are located is uncontrollable, and different combustion conditions during the combustion of the garbage incinerator will cause the temperature at different positions in the flue to change, so that the reaction temperature within the spraying range of the fixed spray guns may not reach the optimal reaction temperature, thereby reducing the reaction efficiency, the denitration reaction is not sufficient, resulting in a certain amount of environmental pollutant emissions and being less environmentally friendly. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a flue gas denitration treatment device for a garbage incinerator. The utility model has the characteristics of adjustable denitration position and improved denitration reaction.

[0005] The technical solution of the utility model: The flue gas denitration treatment device for a garbage incinerator includes a mobile denitration liquid storage tank located outside the flue. One side of the denitration liquid storage tank is provided with a first rotating pipe extending into the flue and a first driving component for driving the first rotating pipe to rotate; the first rotating pipe is provided with a telescopic pipe distributed along the length of the flue and a second driving component for driving the telescopic pipe to expand and contract. The telescopic pipe is provided with a temperature sensor, a flow sensor, a second rotating pipe and a third driving component for driving the second rotating pipe to rotate. A plurality of spray heads are arranged on the second rotating pipe along the circumferential direction, and a rotating blade is arranged at the end of the second rotating pipe.

[0006] In the flue gas denitrification treatment device of the aforementioned waste incinerator, the spray head includes an anti-blocking seat and a nozzle. One end of the nozzle extends into the anti-blocking seat and is movably connected to the anti-blocking seat through a return spring. The other end of the nozzle is provided with a spray hole. A connecting frame is arranged in the anti-blocking seat. A plug is arranged on the connecting frame. The plug extends into the nozzle and there is a gap between the plug and the side wall of the nozzle. The end of the plug is hermetically sealed corresponding to the spray hole.

[0007] In the flue gas denitrification treatment device of the aforementioned waste incinerator, the first driving assembly includes a first driving motor. A first driving gear is arranged on the first driving motor. The first rotating pipe is rotatably connected and communicated with the denitrification liquid storage tank through a rotary joint. A first driven gear meshing with the first driving gear is arranged on the first rotating pipe.

[0008] In the flue gas denitrification treatment device of the aforementioned waste incinerator, the telescopic pipe includes a fixed pipe fixedly connected to the first rotating pipe and a moving pipe sleeved outside the fixed pipe and moving along the length direction of the fixed pipe. The second driving assembly includes a second driving motor. A second driving gear is arranged on the second driving motor. A rack meshing with the second driving gear is arranged on the moving pipe.

[0009] In the flue gas denitrification treatment device of the aforementioned waste incinerator, the third driving assembly includes a third driving motor. A third driving gear is arranged on the third driving motor. The second rotating pipe is rotatably connected and communicated with the telescopic pipe through a rotary joint. A third driven gear meshing with the third driving gear is arranged on the second rotating pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] In the present utility model, the temperature sensor and flow sensor arranged on the telescopic pipe are used to detect the temperature and flue gas flow of each area in the flue. The first rotating pipe and the telescopic pipe are adjusted through the first driving assembly and the second driving assembly, so as to adjust the position, angle and spraying amount of the spray head in the flue, so that the sprayed reducing agent reacts fully with the discharged flue gas at an appropriate high temperature area and flow rate, reduce material waste, improve the treatment efficiency, and thus reduce the emission of NOx pollutants in the flue gas.

[0012] The third driving assembly drives the second rotating pipe to rotate, thereby driving the spray head and the rotating blade to rotate. The rotary spraying of the spray head improves the spraying range and uniformity of the reducing agent; the rotating blade rotates to stir the air flow, disperses the flue gas to the periphery, and guides the position of the spray head, so that the denitrification liquid sprayed by the spray head can fully contact and react with the flue gas, improve the denitrification efficiency, reduce the emission of NOx pollutants in the flue gas, ensure that the flue gas emission meets the environmental protection standards, and reduce the impact and corrosion of NOx pollutants in the flue gas on the equipment. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the present utility model.

[0014] Figure 2 It is a schematic structural diagram of the telescopic pipe.

[0015] Figure 3 It is a schematic structural diagram of the spray head.

[0016] The reference signs in the drawings are: 1, denitrification liquid storage tank; 2, first rotating pipe; 21, first driving assembly; 22, first driving motor; 23, first driving gear; 24, first driven gear; 3, telescopic pipe; 31, second driving assembly; 311, second driving motor; 312, second driving gear; 313, rack; 32, fixed pipe; 33, moving pipe; 41, temperature sensor; 42, flow sensor; 43, second rotating pipe; 44, third driving assembly; 441, third driving motor; 442, third driving gear; 443, third driven gear; 45, spray head; 46, rotating blade; 51, anti-blocking seat; 52, nozzle; 53, return spring; 54, connecting frame; 55, plug. Specific embodiments

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] Embodiment:

[0020] Such as Figures 1-3As shown in the figure, the flue gas denitration treatment device of the waste incinerator includes a mobile denitration liquid storage tank 1 located outside the flue. A track is arranged outside the flue, and driving wheels are arranged on the denitration liquid storage tank 1, so that the denitration liquid storage tank 1 can move on the track. One side of the denitration liquid storage tank 1 is provided with a first rotating pipe 2 extending into the flue and a first driving assembly 21 for driving the first rotating pipe 2 to rotate; the first rotating pipe 2 is provided with a telescopic pipe 3 distributed along the length of the flue and a second driving assembly 31 for driving the telescopic pipe 3 to expand and contract. The telescopic pipe 3 is provided with a temperature sensor 41, a flow sensor 42, a second rotating pipe 43 and a third driving assembly 44 for driving the second rotating pipe 43 to rotate. A plurality of spray heads 45 are arranged on the second rotating pipe 43 along the circumferential direction, and a rotating blade 46 is arranged at the end of the second rotating pipe 43.

[0021] In the utility model, the temperature sensor 41 and the flow sensor 42 arranged on the telescopic pipe 3 are used to detect the temperature and the flue gas flow rate in each area of the flue. The first driving assembly 21 and the second driving assembly 31 are used to adjust the first rotating pipe 2 and the telescopic pipe 3, so as to adjust the position, angle and spraying amount of the spray heads 45 in the flue, so that the sprayed reducing agent can fully react with the discharged flue gas in an appropriate high-temperature area and flow rate, reduce material waste, improve the treatment efficiency, thereby reducing the emission of NOx pollutants in the flue gas and ensuring that the flue gas emission meets the environmental protection standards.

[0022] The third driving assembly 44 drives the second rotating pipe 43 to rotate, thereby driving the spray heads 45 and the rotating blades 46 to rotate. The rotary spraying of the spray heads 45 improves the spraying range and uniformity of the reducing agent; the rotation of the rotating blades 46 agitates the air flow, disperses the flue gas to the periphery, and guides the flue gas to the position of the spray heads 45, so that the denitration liquid sprayed by the spray heads 45 can fully contact and react with the flue gas, reduce omission, improve the denitration efficiency, reduce the emission of NOx pollutants in the flue gas, and reduce the impact and corrosion of NOx pollutants in the flue gas on the equipment.

[0023] The spray head 45 includes an anti-blocking seat 51 and a nozzle 52. One end of the nozzle 52 extends into the anti-blocking seat 51 and is movably connected with the anti-blocking seat 51 through a return spring 53. The other end of the nozzle 52 is provided with a spray hole. A connecting frame 54 is arranged in the anti-blocking seat 51. A plug 55 is arranged on the connecting frame 54. The plug 55 extends into the nozzle 52 and there is a gap between the plug 55 and the side wall of the nozzle 52. The end of the plug 55 is hermetically sealed corresponding to the spray hole. When SNCR denitration treatment is carried out, the denitration liquid is sprayed from the anti-blocking seat 51 into the nozzle 52, impacting the nozzle 52, so that the spray hole is separated from the plug 55, and thus the denitration liquid is sprayed out from the spray hole; when SNCR denitration treatment is not carried out, the nozzle 52 returns to the original position under the action of the return spring 53, and the plug 55 closes the nozzle 52, thereby preventing the particulate pollutants in the flue from entering the spray head 45 through the nozzle 52 and blocking the spray head 45.

[0024] The first driving assembly 21 includes a first driving motor 22. A first driving gear 23 is provided on the first driving motor 22. The first rotating pipe 2 is rotationally connected and communicated with the denitration liquid storage tank 1 through a rotary joint. A first driven gear 24 meshing with the first driving gear 23 is provided on the first rotating pipe 2. The third driving assembly 44 includes a third driving motor 441. A third driving gear 442 is provided on the third driving motor 441. The second rotating pipe 43 is rotationally connected and communicated with the telescopic pipe 3 through a rotary joint. A third driven gear 443 meshing with the third driving gear 442 is provided on the second rotating pipe 43. Each rotating pipe is driven to rotate by a transmission method of motor and gear meshing.

[0025] The telescopic pipe 3 includes a fixed pipe 32 fixedly connected to the first rotating pipe 2 and a moving pipe 33 sleeved outside the fixed pipe 32 and moving along the length direction of the fixed pipe 32. The second driving assembly 31 includes a second driving motor 311. A second driving gear 312 is provided on the second driving motor 311. A rack 313 meshing with the second driving gear 312 is provided on the moving pipe 33. By driving the second driving gear 312 to rotate through the second driving motor 311, the second driving gear 312 drives the rack 313 to move horizontally, driving the moving pipe 33 to move on the fixed pipe 32, adjusting the length of the telescopic pipe 3, and thus adjusting the spraying position of the spray head 45 on the moving pipe 33.

[0026] The parts not detailed in the present utility model are the prior art and will not be specifically described herein.

Claims

1. A flue gas denitrification treatment device for a garbage incinerator, characterized in that: The invention comprises a mobile denitrification liquid storage tank (1) located outside a flue, wherein a first rotating tube (2) extending into the flue and a first driving assembly (21) for driving the first rotating tube (2) to rotate are provided on one side of the denitrification liquid storage tank (1); a telescopic tube (3) distributed along the length of the flue and a second driving assembly (31) for driving the telescopic tube (3) to telescope are provided on the first rotating tube (2); a temperature sensor (41), a flow sensor (42), a second rotating tube (43) and a third driving assembly (44) for driving the second rotating tube (43) to rotate are provided on the telescopic tube (3); a plurality of spray heads (45) are provided on the second rotating tube (43) along the circumferential direction; and a rotating blade (46) is provided at the end of the second rotating tube (43).

2. The flue gas denitrification treatment device for a waste incinerator according to claim 1, characterized in that: The spray head (45) comprises an anti-blocking seat (51) and a nozzle (52), one end of the nozzle (52) extends into the anti-blocking seat (51) and is movably connected to the anti-blocking seat (51) via a return spring (53), the other end of the nozzle (52) is provided with a spray hole, a connecting frame (54) is provided in the anti-blocking seat (51), a plug (55) is provided on the connecting frame (54), the plug (55) extends into the nozzle (52) and leaves a gap between the side walls of the nozzle (52), and the end of the plug (55) is sealed corresponding to the spray hole.

3. The flue gas denitrification treatment device for a waste incinerator according to claim 1, characterized in that: The first drive assembly (21) comprises a first drive motor (22), the first drive motor (22) is provided with a first driving gear (23), the first rotating tube (2) is rotationally connected and communicated with the denitration liquid storage tank (1) through a rotating joint, and the first rotating tube (2) is provided with a first passive gear (24) meshing with the first driving gear (23).

4. The flue gas denitrification treatment device for a waste incinerator according to claim 1, characterized in that: The telescopic tube (3) comprises a fixed tube (32) fixedly connected to the first rotating tube (2) and a movable tube (33) sleeved outside the fixed tube (32) and movable along the length direction of the fixed tube (32); the second driving assembly (31) comprises a second driving motor (311); the second driving motor (311) is provided with a second driving gear (312); and the movable tube (33) is provided with a rack (313) meshing with the second driving gear (312).

5. The flue gas denitrification treatment device for a waste incinerator according to claim 1, characterized in that: The third driving assembly (44) comprises a third driving motor (441), the third driving motor (441) is provided with a third driving gear (442), the second rotating tube (43) is rotatably connected and communicated with the telescopic tube (3) through a rotating joint, and the second rotating tube (43) is provided with a third driven gear (443) meshing with the third driving gear (442).

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