An apparatus and method for treating dioxin gases in incinerator flue gas

Abstract

The application discloses a device and method for treating dioxin gas in flue gas of an incinerator, and relates to the technical field of waste gas treatment. The device comprises a water tank, a support frame is arranged at the bottom of the water tank, the water tank is internally filled with condensate water, an air inlet pipe is arranged at one side of the water tank, the air inlet pipe penetrates through the water tank and extends into the condensate water, an air outlet pipe is arranged at the side, away from the air inlet pipe, of the water tank, a testing head is arranged at the top of the air outlet pipe, and a slag collecting assembly is arranged in the water tank. The waste gas enters into the baffle through the air holes in the surface of the air-permeable substrate, the output shaft of the rotating motor drives the fan blade to rotate, the fan blade rotation causes air blowing outside the air outlet pipe, negative pressure is generated in the air outlet pipe, the dioxin gas in the water tank enters into the air outlet pipe through the through holes in the surface of the air-permeable substrate, and the activated carbon box adsorbs the dioxin gas in the flue gas, so that the dioxin gas is quickly adsorbed and removed.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to an apparatus and method for treating dioxin gas in incinerator flue gas. Background Technology

[0002] Currently, most incinerator flue gas treatment processes utilize waste heat from the flue gas through heat exchange technology, then treat conventional pollutants using various techniques, and finally remove dust using dust removal technology. Throughout this process, the flue gas temperature is naturally cooled by the air. However, dioxins in the flue gas are not effectively treated. Dioxins are highly toxic gases, and their untreated release would cause significant harm and pollution to the air. Therefore, flue gas treatment devices are now widely used to treat dioxins.

[0003] There are many existing technologies for flue gas treatment devices, such as:

[0004] Chinese invention patent CN109731432A discloses a device for treating dioxin gas in incinerator flue gas, relating to the field of waste gas treatment and environmental protection. It includes a flue gas filtration system for filtering incinerator flue gas, an exhaust fan for drawing in the filtered flue gas, an atomizing chamber for cooling the flue gas drawn in by the exhaust fan, and a blower for drawing in the cooled gas. The atomizing chamber contains a room-temperature water pipe connected to a water pump located outside the atomizing chamber, at least one high-temperature flue gas pipe connected to the exhaust fan, and at least one atomizing nozzle. The device uses the atomizing nozzle to atomize and spray water entering from the water pipe under the action of water pressure and high-temperature flue gas pressure. The high-temperature flue gas causes the room-temperature water to vaporize instantaneously, carrying away a large amount of heat from the flue gas, resulting in a significant instantaneous drop in the temperature of the high-temperature flue gas to below 200°C. This bypasses the optimal temperature for dioxin resynthesis (200-400°C) and prevents the resynthesis of dioxins.

[0005] However, some problems still exist in actual use:

[0006] 1. In actual operation, traditional flue gas treatment devices use activated carbon for absorption. However, due to the large amount of dust and impurities in the flue gas, the activated carbon becomes saturated quickly and needs to be replaced frequently, which increases the labor intensity of the operators.

[0007] 2. In traditional static activated carbon adsorption devices, the activated carbon particles are fixed and the flue gas passes through the activated carbon layer sequentially along a fixed flow channel. This results in the activated carbon in the front area of ​​the airflow becoming saturated quickly, while the activated carbon in the rear and edge areas is not fully utilized, leading to low activated carbon utilization, frequent replacement, and serious waste of resources. Summary of the Invention

[0008] In order to overcome the above-mentioned defects in the prior art, the present invention provides an apparatus and method for treating dioxin gas in incinerator flue gas.

[0009] To achieve the above objectives, the present invention aims to provide an apparatus and method for treating dioxin gas in incinerator flue gas, comprising a water tank, a support frame at the bottom of the water tank, condensate inside the water tank, an air inlet pipe on one side of the water tank that penetrates the water tank and extends into the condensate, an exhaust pipe on the side of the water tank away from the air inlet pipe, a test head at the top of the exhaust pipe for detecting the dioxin gas content in the exhaust gas, a slag collection assembly inside the water tank for collecting impurities in the condensate, and a purification assembly inside the exhaust pipe for absorbing dioxin gas in the flue gas.

[0010] Furthermore, a heating plate is provided at the bottom of the exhaust pipe, which is used to dry the water vapor generated by the condensation in the water tank.

[0011] Furthermore, the slag collection assembly includes a servo motor located at the bottom of the water tank. The output shaft of the servo motor passes through the water tank and has a main gear at its end. Secondary gears are located on both sides of the main gear. A lead screw is located at the end of the secondary gear. An adsorption plate is located on the surface of the lead screw. When the lead screw rotates, it drives the adsorption plate to move relative to the main gear.

[0012] Furthermore, the purification component includes an activated carbon box disposed inside the exhaust pipe, the activated carbon box being filled with activated carbon particles.

[0013] Furthermore, a breathable substrate is provided below the activated carbon box, a rotating motor is provided at the bottom of the breathable substrate, and a fan blade is provided at the output end of the rotating motor.

[0014] Furthermore, the top of the breathable substrate is provided with a partition, and the side wall of the partition is provided with a through groove, so that the exhaust gas enters the interior of the partition through the vent holes on the surface of the breathable substrate.

[0015] Furthermore, the activated carbon box is equipped with a mixing component inside, which is used to agitate the activated carbon. The mixing component includes a column inside the activated carbon box, the column being arranged in a ring array. A sliding rod is slidably provided on the inner wall of the column, the sliding rod passing through the activated carbon box to the outside. An elastic element is provided between the column and the sliding rod. A sliding groove is provided on the side wall of the column, and an extension column is provided at the top of the sliding rod. The extension column passes through the sliding groove and has a lever at its end.

[0016] Furthermore, a connecting shaft is provided between the rotating motor and the fan blade, and a turntable is provided on the surface of the connecting shaft. The surface of the turntable is provided with slope blocks, which are arranged in an array. When the slope blocks rotate, they push the slide rod to move in the vertical direction.

[0017] A second objective of this invention is to provide a method for treating dioxin gas in incinerator flue gas, comprising the apparatus described in any one of the above-mentioned methods for treating dioxin gas in incinerator flue gas, including the following steps:

[0018] S1. Flue gas enters the condensate in the water tank through the intake pipe. Dust and impurities in the flue gas are absorbed into the water. The water vapor is dried by the heating plate. Dioxin gas in the exhaust gas enters the exhaust pipe.

[0019] S2. By controlling the horizontal reciprocating movement of the slag collection component in the condensate inside the water tank, the slag collection component adsorbs and filters the dust and impurities mixed in the condensate, thereby preventing the condensate from polluting the environment after it is discharged.

[0020] S3. When dioxin gas enters the exhaust pipe, it is adsorbed and purified by the purification component. At the same time, the mixing component agitates the activated carbon particles in the purification component, increasing the service life of the purification component.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In this device for treating dioxin gas in incinerator flue gas, the output of the servo motor is controlled to drive the main gear to rotate coaxially. When the main gear rotates, it drives the secondary gear to mesh and rotate. When the secondary gear rotates, it drives the lead screw to rotate. When the lead screw rotates, it drives the adsorption plate to move horizontally back and forth. The adsorption plate is composed of filter screen and filter cotton. The adsorption plate adsorbs and filters the dust and impurities mixed in the condensate, thereby preventing the condensate from polluting the environment after it is discharged.

[0023] 2. In this device for treating dioxin gas in incinerator flue gas, the exhaust gas enters the interior of the baffle through the vent holes on the surface of the vent plate. The output shaft of the control motor drives the fan blades to rotate. When the fan blades rotate, they blow air onto the outside of the exhaust pipe, creating a negative pressure inside the exhaust pipe. At this time, the dioxin gas inside the water tank enters the interior of the exhaust pipe through the through holes on the surface of the vent plate, and the dioxin gas in the flue gas is adsorbed by the activated carbon box, thereby achieving rapid adsorption and removal of dioxin gas.

[0024] 3. In this device for treating dioxin gas in incinerator flue gas, when activated carbon adsorbs dioxin gas in the flue gas, the output shaft of the rotating motor drives the fan blades to rotate, and the turntable drives the slope block to rotate coaxially. During the rotation of the slope block, it pushes the bottom of the slide rod to move vertically upward. During the movement of the slide rod, it squeezes the elastic element to produce deformation. At the same time, the extension column at the top of the slide rod slides on the inner wall of the slide groove, causing the deflector plate at the end of the extension column to rotate and agitate the activated carbon inside the activated carbon box. This keeps the activated carbon in the activated carbon box in a state of agitation, preventing the activated carbon particles from accumulating statically, thereby ensuring that the activated carbon particles can be fully utilized and improving the service life of the purification components. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the slag collection component structure of the present invention;

[0029] Figure 4 This is a cross-sectional view of the exhaust pipe of the present invention;

[0030] Figure 5 For the present invention Figure 4 Schematic diagram at point A;

[0031] Figure 6 This is a schematic diagram of the partition structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the purification component structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the hybrid component structure of the present invention.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 100. Water tank; 101. Support frame; 102. Air intake pipe;

[0036] 200. Exhaust pipe; 201. Test head; 202. Heating plate;

[0037] 300. Slag collection assembly; 301. Servo motor; 302. Main gear; 303. Secondary gear; 304. Lead screw; 305. Adsorption plate;

[0038] 400. Purification component; 401. Activated carbon box; 402. Breathable substrate; 403. Rotating motor; 404. Fan blade; 405. Partition; 406. Through groove;

[0039] 500. Hybrid component; 501. Column; 502. Slide bar; 503. Elastic element; 504. Slide groove; 505. Extension column; 506. Dial plate; 507. Turntable; 508. Slope block. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] An apparatus and method for treating dioxin gas in incinerator flue gas, based on Figure 1-8 As shown, the system includes a water tank 100, a support frame 101 at the bottom of the water tank 100, and condensate inside the water tank 100. An air inlet pipe 102 is located on one side of the water tank 100, penetrating the water tank 100 and extending into the condensate. An exhaust pipe 200 is located on the side of the water tank 100 away from the air inlet pipe 102, and a test head 201 is located at the top of the exhaust pipe 200 for detecting dioxin gas content in the exhaust gas. A sludge collection assembly 300 is located inside the water tank 100 for collecting impurities in the condensate. A purification assembly 400 is located inside the exhaust pipe 200 for absorbing dioxin gas in the flue gas.

[0042] Considering that the flue gas contains a large amount of dust, when dioxin gas is adsorbed by activated carbon, the dust will also be adsorbed, which will reduce the service life of the activated carbon and increase the cost of flue gas purification. Therefore, the water tank 100 is filled with condensate, and the bottom of the exhaust pipe 200 is equipped with a heating plate 202. The heating plate 202 is used to dry the water vapor generated by the condensate in the water tank 100. The flue gas enters the condensate in the water tank 100 through the air inlet pipe 102. The dust and impurities in the flue gas are dissolved into the water. The high temperature of the gas will cause the condensate to generate water vapor. The water vapor is dried by the heating plate 202. The dioxin gas in the exhaust gas enters the interior of the exhaust pipe 200 and is absorbed by the activated carbon box 401, thereby improving the service life of the activated carbon.

[0043] Considering that frequent replacement of condensate is required when cleaning dust and impurities from flue gas, and to avoid environmental pollution from condensate mixed with flue gas impurities, the slag collection assembly 300 includes a servo motor 301 located at the bottom of the water tank 100. The output shaft of the servo motor 301 passes through the water tank 100 and has a main gear 302 at its end. Secondary gears 303 are located on both sides of the main gear 302, and a lead screw 304 is located at the end of each secondary gear 303. An adsorption plate 305 is provided on the surface of the lead screw 304. The lead screw 304 rotates... The adsorption plate 305 moves relative to the filter in the flue gas. When filtering dust and impurities in the flue gas, the output of the servo motor 301 drives the main gear 302 to rotate coaxially. When the main gear 302 rotates, it drives the secondary gear 303 to mesh and rotate. When the secondary gear 303 rotates, it drives the lead screw 304 to rotate. When the lead screw 304 rotates, it drives the adsorption plate 305 to move horizontally back and forth. The adsorption plate 305 is composed of filter screen and filter cotton. The adsorption plate 305 adsorbs and filters the dust and impurities mixed in the condensate, thereby preventing the condensate from polluting the environment after it is discharged.

[0044] Considering that dust and impurities dissolve in the condensate after the flue gas passes through it, but dioxins in the flue gas are insoluble in water, the purification component 400 includes an activated carbon box 401 located inside the exhaust pipe 200. The activated carbon box 401 is filled with activated carbon particles. When dioxins in the flue gas enter the exhaust pipe 200 and pass through the activated carbon box 401, the activated carbon absorbs the dioxins, thereby protecting the environment.

[0045] To facilitate the rapid entry of dioxin gas into the exhaust pipe 200 for adsorption and removal, a permeable substrate 402 is provided below the activated carbon box 401. A rotating motor 403 is located at the bottom of the permeable substrate 402, and a fan blade 404 is provided at the output end of the rotating motor 403. A partition 405 is provided at the top of the permeable substrate 402, and a through groove 406 is provided on the side wall of the partition 405. Exhaust gas enters the partition 405 through the permeable holes on the surface of the permeable substrate 402. By controlling the output shaft of the rotating motor 403 to drive the fan blade 404 to rotate, the fan blade 404 causes air to blow out of the exhaust pipe 200, creating a negative pressure inside the exhaust pipe 200. At this time, the dioxin gas inside the water tank 100 enters the exhaust pipe 200 through the through holes on the surface of the permeable substrate 402, and is adsorbed by the activated carbon box 401, thereby achieving rapid adsorption and removal of dioxin gas.

[0046] In traditional static activated carbon adsorption devices, the activated carbon particles are fixed, and the flue gas only passes through the activated carbon layer sequentially along a fixed flow channel. This results in rapid saturation of the activated carbon in the front area of ​​the airflow, while the activated carbon in the rear and edge areas is not fully utilized, leading to low activated carbon utilization, frequent replacement, and serious resource waste. Therefore, the activated carbon box 401 is equipped with a mixing component 500 to agitate the activated carbon. The mixing component 500 includes a column 501 disposed inside the activated carbon box 401, arranged in a ring array. A sliding rod 502 is slidably provided on the inner wall of the column 501, penetrating the activated carbon box 401 to the outside. An elastic element 503 is provided between the column 501 and the sliding rod 502. The side wall of the column 501 is provided with... The slide 504 has an extension column 505 at the top of the slide rod 502. The extension column 505 passes through the slide 504 and has a deflector plate 506 at its end. When the activated carbon adsorbs dioxins in the flue gas, the slide rod 502 is pushed to move vertically. The slide rod 502 slides on the inner wall of the column cylinder 501. During the movement of the slide rod 502, it squeezes and deforms the elastic element 503. At the same time, the extension column 505 at the top of the slide rod 502 slides on the inner wall of the slide 504, causing the deflector plate 506 at the end of the extension column 505 to rotate and agitate the activated carbon inside the activated carbon box 401. This keeps the activated carbon in the activated carbon box 401 in a stirred state, preventing the activated carbon particles from accumulating statically, thereby ensuring that the activated carbon particles can be fully utilized and improving the service life of the purification component 400.

[0047] In actual production, to reduce the labor intensity of operators, a connecting shaft is provided between the rotary motor 403 and the fan blade 404. A turntable 507 is provided on the surface of the connecting shaft, and slope blocks 508 are provided on the surface of the turntable 507. The slope blocks 508 are arranged in an array. When the slope blocks 508 rotate, they push the slide rod 502 to move vertically. During the removal of dioxin gas from the exhaust gas, as the output shaft of the rotary motor 403 drives the fan blade 404 to rotate, the turntable 507 drives the slope blocks 508 to move in the same direction. As the shaft rotates, the slope block 508 pushes the bottom of the slide rod 502 to move vertically upwards, causing the slide rod 502 to reciprocate against the inner wall of the column cylinder 501. This causes the extension column 505 to drive the dial plate 506 to rotate against the inner wall of the groove 504, thereby agitating the activated carbon inside the activated carbon box 401 and ensuring uniform absorption of the activated carbon particles. At the same time, as the slope block 508 rotates, it passes through the through groove 406 at intervals, reducing the rate at which dioxin gas flows into the activated carbon box 401 from the through groove 406 and ensuring the adsorption efficiency of the activated carbon.

[0048] In practical use, the flue gas enters the condensate in the water tank 100 through the intake pipe 102. The dust and impurities in the flue gas are absorbed into the water. The high temperature of the gas causes the condensate to produce water vapor, which is dried by the heating plate 202. The dioxin gas in the exhaust gas enters the exhaust pipe 200 and is absorbed by the activated carbon box 401, which improves the service life of the activated carbon.

[0049] The main gear 302 is driven to rotate coaxially by the output of the servo motor 301. When the main gear 302 rotates, it drives the secondary gear 303 to mesh and rotate. When the secondary gear 303 rotates, it drives the lead screw 304 to rotate. When the lead screw 304 rotates, it drives the adsorption plate 305 to move horizontally back and forth. The adsorption plate 305 is composed of a filter screen and filter cotton. The adsorption plate 305 adsorbs and filters the dust and impurities mixed in the condensate water, thereby preventing the condensate water from polluting the environment after it is discharged.

[0050] Exhaust gas enters the partition 405 through the vent holes on the surface of the ventilated substrate 402. The output shaft of the control motor 403 drives the fan blade 404 to rotate. When the fan blade 404 rotates, it blows air to the outside of the exhaust pipe 200, creating a negative pressure inside the exhaust pipe 200. At this time, the dioxin gas inside the water tank 100 enters the exhaust pipe 200 through the through holes on the surface of the ventilated substrate 402. The dioxin gas in the flue gas is then adsorbed by the activated carbon box 401, thereby achieving rapid adsorption and removal of dioxin gas.

[0051] When activated carbon adsorbs dioxins in flue gas, the output shaft of the rotating motor 403 drives the fan blades 404 to rotate, while the turntable 507 drives the slope block 508 to rotate coaxially. During the rotation of the slope block 508, the bottom of the slide rod 502 is pushed to move vertically upward. During the movement of the slide rod 502, it compresses the elastic element 503 and causes deformation. At the same time, the extension column 505 at the top of the slide rod 502 slides on the inner wall of the groove 504, causing the deflector plate 506 at the end of the extension column 505 to rotate and agitate the activated carbon inside the activated carbon box 401. This keeps the activated carbon in the activated carbon box 401 in a state of agitation, preventing the activated carbon particles from accumulating statically, thereby ensuring that the activated carbon particles can be fully utilized and improving the service life of the purification component 400.

[0052] A second objective of this invention is to provide a method for treating dioxin gas in incinerator flue gas, comprising the apparatus described in any one of the above-mentioned methods for treating dioxin gas in incinerator flue gas, including the following steps:

[0053] S1. Flue gas enters the condensate in water tank 100 through intake pipe 102. Dust and impurities in flue gas are incorporated into the water. The water vapor is dried by heating plate 202. Dioxin gas in exhaust gas enters the interior of exhaust pipe 200.

[0054] S2. By controlling the horizontal reciprocating movement of the slag collection component 300 in the condensate inside the water tank 100, the slag collection component 300 adsorbs and filters the dust and impurities mixed in the condensate, thereby preventing the condensate from polluting the environment after it is discharged.

[0055] S3. When dioxin gas enters the exhaust pipe 200, it is adsorbed and purified by the purification component 400. At the same time, the mixing component 500 agitates the activated carbon particles in the purification component 400, increasing the service life of the purification component 400.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for treating dioxin gas in incinerator flue gas, characterized in that: The system includes a water tank (100), a support frame (101) at the bottom of the water tank (100), condensate water inside the water tank (100), an air inlet pipe (102) on one side of the water tank (100) that penetrates the water tank (100) and extends into the condensate water, an exhaust pipe (200) on the side of the water tank (100) away from the air inlet pipe (102), a test head (201) at the top of the exhaust pipe (200) for detecting dioxin gas content in exhaust gas, a slag collection assembly (300) inside the water tank (100) for collecting impurities in the condensate water, and a purification assembly (400) inside the exhaust pipe (200) for absorbing dioxin gas in the flue gas. The purification component (400) includes an activated carbon box (401) disposed inside the exhaust pipe (200), the activated carbon box (401) is filled with activated carbon particles, a breathable substrate (402) is disposed below the activated carbon box (401), a rotating motor (403) is disposed at the bottom of the breathable substrate (402), a fan blade (404) is disposed at the output end of the rotating motor (403), a partition (405) is disposed at the top of the breathable substrate (402), and a through groove (406) is disposed on the side wall of the partition (405). Exhaust gas enters the interior of the partition (405) through the vent holes on the surface of the breathable substrate (402). The activated carbon box (401) is provided with a mixing component (500) inside. The mixing component (500) is used to agitate the activated carbon. The mixing component (500) includes a column (501) disposed inside the activated carbon box (401). The column (501) is arranged in a ring array. A slide rod (502) is slidably provided on the inner wall of the column (501). The slide rod (502) passes through the activated carbon box (401) to the outside. An elastic element (503) is provided between the column (501) and the slide rod (502). A groove (504) is provided on the side wall of the column (501). An extension column (505) is provided at the top of the slide rod (502). The extension column (505) passes through the groove (504) and has a lever (506) at its end. A connecting shaft is provided between the rotating motor (403) and the fan blade (404). A turntable (507) is provided on the surface of the connecting shaft. A slope block (508) is provided on the surface of the turntable (507). The slope blocks (508) are arranged in an array. When the slope block (508) rotates, it pushes the slide rod (502) to move back and forth in the vertical direction, thereby causing the extension column (505) to drive the dial plate (506) to rotate on the inner wall of the slide groove (504) and to move the activated carbon inside the activated carbon box (401).

2. The apparatus for treating dioxin gas in incinerator flue gas according to claim 1, characterized in that, The bottom of the exhaust pipe (200) is provided with a heating plate (202), which is used to dry the water vapor generated by the condensate in the water tank (100).

3. The apparatus for treating dioxin gas in incinerator flue gas according to claim 1, characterized in that, The slag collection assembly (300) includes a servo motor (301) located at the bottom of the water tank (100). The output shaft of the servo motor (301) passes through the water tank (100) and has a main gear (302) at its end. The main gear (302) has auxiliary gears (303) on both sides. The auxiliary gear (303) has a lead screw (304) at its end. The lead screw (304) has an adsorption plate (305) on its surface. When the lead screw (304) rotates, it drives the adsorption plate (305) to move relative to each other.

4. A method for treating dioxin gas in incinerator flue gas, implemented by the apparatus for treating dioxin gas in incinerator flue gas according to any one of claims 1-3, characterized in that: Includes the following steps: S1. Flue gas enters the condensate in the water tank (100) through the intake pipe (102). Dust and impurities in the flue gas are incorporated into the water. The water vapor is dried by the heating plate (202). Dioxin gas in the exhaust gas enters the interior of the exhaust pipe (200). S2. By controlling the horizontal reciprocating movement of the slag collection component (300) in the condensate inside the water tank (100), the slag collection component (300) adsorbs and filters the dust and impurities mixed in the condensate, thereby preventing the condensate from polluting the environment after it is discharged. S3. When dioxin gas enters the exhaust pipe (200), it is adsorbed and purified by the purification component (400). At the same time, the mixing component (500) stirs the activated carbon particles in the purification component (400) to increase the service life of the purification component (400).

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