Waste incineration dioxin treatment device and method

Abstract

The garbage incineration dioxin treatment device comprises a heat exchange mechanism, a dust removal mechanism, an incineration mechanism, a cooling mechanism, a spraying mechanism and an activated carbon adsorption mechanism which are sequentially arranged, and is characterized in that the incineration mechanism comprises an incinerator (1), and the incinerator (1) is sequentially provided with a first-stage incineration bin (2) and a second-stage incineration bin (3) in the waste gas running direction; an atomization oil sprayer (4) and an air inlet pipe (5) directly connected with an air outlet of the dust removal mechanism are arranged at the front end of the first-stage incineration bin (2), an air inlet of the atomization oil sprayer (4) is connected with the air outlet of the dust removal mechanism, an oil inlet of the atomization oil sprayer (4) is connected with an oil liquid tank (6), a combustible gas inlet (7) is formed in the side face of the second-stage incineration bin (3), and oxygen supply pipes (8) are arranged at the bottoms of the first-stage incineration bin (2) and the second-stage incineration bin (3). The reaction effect of dioxin can be improved, and the possibility of regeneration is reduced.

Description

Technical Field

[0001] The present invention relates to a dioxin treatment device and method, in particular to a dioxin treatment device and method from garbage incineration. Background Art

[0002] Dioxins, a collective term for polychlorinated dibenzodioxins and polychlorinated dibenzofurans, are highly toxic chlorine-containing organic chemicals. They are byproducts of combustion and various industrial processes, primarily from waste incineration, chemical metallurgy, papermaking, pesticide production, and automobile exhaust emissions. They are classified as Class I carcinogens by the World Health Organization (WHO). Long-term exposure can cause liver cancer, lung cancer, and soft tissue sarcomas.

[0003] The main existing methods for treating dioxins include high-temperature incineration, activated carbon adsorption, chemical and catalytic treatment, etc. When using high-temperature incineration to treat dioxins, there is a high risk of incomplete dioxin reaction and regeneration. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for treating dioxins from garbage incineration, which can improve the reaction effect of dioxins and reduce the possibility of their regeneration.

[0005] The technical solution of the present invention is: a garbage incineration dioxin treatment device and method, including a heat exchange mechanism, a dust removal mechanism, an incineration mechanism, a cooling mechanism, a spray mechanism and an activated carbon adsorption mechanism arranged in sequence, the incineration mechanism includes an incinerator, and the incinerator is provided with a primary incineration chamber and a secondary incineration chamber in sequence in the direction of exhaust gas flow, an atomizing fuel injector and an air inlet pipe directly connected to the air outlet of the dust removal mechanism are provided at the front end of the primary incineration chamber, the air inlet of the atomizing fuel injector is connected to the air outlet of the dust removal mechanism, the oil inlet of the atomizing fuel injector is connected to the oil tank, a combustible gas inlet is provided on the side of the secondary incineration chamber, and an oxygen supply pipe is provided at the bottom of the primary incineration chamber and the secondary incineration chamber.

[0006] In the aforementioned waste incineration dioxin treatment device, the dust removal mechanism is a bag-type dust removal mechanism, which includes a body, a partition provided in the middle of the body, a plurality of dust removal bags passing through the partition with the bag openings facing upwards, an exhaust port provided on the side wall of the body above the partition, an air inlet provided on the side wall of the body below the partition, a slag discharge port provided in the middle of the lower end of the body, a swinging cleaning mechanism for cleaning the dust removal bags provided on the lower side of the partition, and a pulse cleaning mechanism provided on the upper side of the partition.

[0007] In the aforementioned garbage incineration dioxin treatment device, the dust removal bag is a dust removal bag with a circular cross-section, and a support frame is provided inside the dust removal bag.

[0008] In the aforementioned waste incineration dioxin treatment device, the pulse cleaning mechanism includes a mounting seat, a telescopic rod connected to the top inner side of the body is provided at the upper end of the mounting seat, a first return spring is provided between the telescopic rods, and a first cam is provided on the side wall of the body for driving the mounting plate to move up and down, the first cam is located on the upper side of the mounting plate, an air supply pipe is provided in the mounting plate, and evenly distributed recoil nozzles are provided on the lower side of the air supply pipe. The air supply pipe is connected to an air pump provided outside the body through a corrugated hose; a support rod is provided on the lower side of the air supply pipe, and the lower end of the support rod is connected to a rotating shaft provided in the support frame through a universal joint, a spiral guide groove is provided outside the rotating shaft, a limit block corresponding to the spiral guide groove is provided in the support frame, and a block is provided at the lower end of the rotating shaft to abut against the dust bag.

[0009] In the aforementioned waste incineration dioxin treatment device, the swinging cleaning mechanism includes an outer gear ring arranged on the outside of the dust removal bag, the outer gear ring is provided with evenly distributed mounting rods, the mounting rods are provided with cleaning brushes corresponding to the dust removal bags, one side of the outer gear ring is provided with a rack for driving the outer gear ring to rotate, and one side of the rack is provided with a driving mechanism for driving the rack to swing back and forth.

[0010] In the aforementioned waste incineration dioxin treatment device, the driving mechanism includes a second cam arranged at one end of the rack and a second return spring arranged at the other end of the rack, and limit bars are provided on the outer sides of both ends of the rack.

[0011] In the aforementioned waste incineration dioxin treatment device, the cooling mechanism includes a heat exchange box arranged on the rear side of the incinerator, an exhaust gas inlet is provided on the lower side of the front end of the heat exchange box, and an exhaust gas outlet is provided on the upper side of the rear end of the heat exchange box. The front and rear ends of the heat exchange box are provided with rotating seats that can rotate relative to the heat exchange box, and cold water pipes are provided between the rotating seats in the front and rear directions. A drive motor for driving the rotating seat to rotate is provided on the rear side of the heat exchange box.

[0012] A method for using a garbage incineration dioxin treatment device, comprising:

[0013] S1. Passing the dioxin waste gas into a heat exchange mechanism for heat exchange to reduce the waste gas temperature, and removing solid particles in the dioxin waste gas through a dust removal mechanism;

[0014] S2. The dioxin waste gas is further introduced into the primary incineration chamber. Upon entering, it is fully contacted with the oil through the atomizing oil sprayer, allowing the dioxins to dissolve in the oil and the oil and dioxin waste gas to mix more evenly, thereby improving the waste gas treatment effect. The dioxin waste gas is further introduced into the secondary incineration chamber for treatment. The temperature in the primary and secondary incineration chambers is controlled at above 850 degrees Celsius.

[0015] S3. The dioxin waste gas is then sent to a cooling mechanism to reduce the possibility of dioxin regeneration, and finally adsorbed by an activated carbon adsorption mechanism.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This application uses an atomizing oil sprayer to mix dioxin waste gas with oil and spray it out, so that the dioxin can be partially dissolved in the atomized oil during the mixing process and incinerated in the primary incineration chamber. This can improve the treatment effect of dioxins, and further high-temperature treatment of dioxins in the secondary incineration chamber can control the dioxin treatment time.

[0018] 2. This application removes solid components from dioxin waste gas through a dust removal mechanism to prevent the solid components from combining with oil to cause coking. The dust removal mechanism can also achieve self-cleaning, thereby improving the waste gas filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the dust removal mechanism of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the cooling mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the incinerator of the present invention.

[0023] The markings in the attached figure are: 1-incinerator, 2-first incineration chamber, 3-secondary incineration chamber, 4-atomizing injector, 5-intake pipe, 6-oil tank, 7-combustible gas inlet, 8-oxygen supply pipe, 9-machine body, 10-partition, 11-dust bag, 12-exhaust port, 13-intake port, 14-slag discharge port, 15-first cam, 16-air supply pipe, 17-recoil nozzle, 18-first return spring, 19-support rod, 20-universal joint Head, 21-rotating shaft, 22-spiral guide groove, 23-limiting block, 24-block, 25-outer gear ring, 26-mounting rod, 27-cleaning brush, 30-rack, 31-second cam, 32-second return spring, 33-limiting strip, 34-heat exchange box, 35-exhaust gas inlet, 36-exhaust gas outlet, 37-rotating seat, 38-cold water pipe, 39-drive motor, 40-support frame, 41-mounting seat, 42-telescopic rod. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0025] Embodiment. A device and method for treating dioxins from garbage incineration, comprising: Figure 1As shown, it includes a heat exchange mechanism, a dust removal mechanism, an incineration mechanism, a cooling mechanism, a spray mechanism and an activated carbon adsorption mechanism arranged in sequence. The incineration mechanism includes an incinerator 1. The incinerator 1 is provided with a first-level incineration bin 2 and a second-level incineration bin 3 in sequence in the direction of exhaust gas flow. The front end of the first-level incineration bin 2 is provided with an atomizing injector 4 and an air inlet pipe 5 directly connected to the air outlet of the dust removal mechanism. The air inlet of the atomizing injector 4 is connected to the air outlet of the dust removal mechanism, and the oil inlet of the atomizing injector 4 is connected to the oil tank 6. A combustible gas inlet 7 is provided on the side of the second-level incineration bin 3, and an oxygen supply pipe 8 is provided at the bottom of the first-level incineration bin 2 and the second-level incineration bin 3.

[0026] The dust removal mechanism is a bag-type dust removal mechanism, which includes a body 9, a partition 10 is provided in the middle of the body 9, and a plurality of dust bags 11 are provided in the partition 10 with the bag openings facing upwards, an exhaust port 12 is provided on the side wall of the body 9 on the upper side of the partition 10, an air inlet 13 is provided on the side wall of the body 9 on the lower side of the partition 10, a slag discharge port 14 is provided in the middle of the lower end of the body 9, a swing cleaning mechanism for cleaning the dust bag 11 is provided on the lower side of the partition 10, and a pulse cleaning mechanism is provided on the upper side of the partition 10; the dust bag 11 is a dust bag with a circular cross-section, and a support frame 40 is provided in the dust bag 11; the pulse cleaning mechanism includes a mounting seat 41, and the upper end of the mounting seat 41 is provided with a telescopic rod connected to the top of the inner side of the body 9 42, a first return spring 18 is provided between the telescopic rods 42, and a first cam 15 for driving the mounting plate 13 to move up and down is provided on the side wall of the body 9, and the first cam 15 is located on the upper side of the mounting plate 13, and an air pipe 16 is provided in the mounting plate 13, and a recoil nozzle 17 is evenly distributed on the lower side of the air pipe 16. The air pipe 16 is connected to the air pump provided outside the body 9 through a corrugated hose; a support rod 19 is provided on the lower side of the air pipe 16, and the lower end of the support rod 19 is connected to a rotating shaft 21 provided in the support frame 40 through a universal joint 20, and a spiral guide groove 22 is provided outside the rotating shaft 21, and a limit block 23 corresponding to the spiral guide groove 22 is provided in the support frame 40, and a block 24 is provided at the lower end of the rotating shaft 21 for abutting against the dust bag 11.

[0027] The swinging cleaning mechanism includes an outer gear ring 25 arranged on the outside of the dust bag 11, and the outer gear ring 25 is provided with evenly distributed mounting rods 26. The mounting rods 26 are provided with a cleaning brush 27 corresponding to the dust bag 11. A rack 30 is provided on one side of the outer gear ring 25 to drive the outer gear ring 25 to rotate, and a driving mechanism is provided on one side of the rack 30 to drive the rack 30 to swing back and forth.

[0028] The driving mechanism includes a second cam 31 provided at one end of the rack 30 and a second return spring 32 provided at the other end of the rack 30 . Limiting bars 33 are provided on the outer sides of both ends of the rack 30 .

[0029] The cooling mechanism includes a heat exchange box 34 arranged on the rear side of the incinerator 1, an exhaust gas inlet 35 is provided on the lower side of the front end of the heat exchange box 34, an exhaust gas outlet 36 is provided on the upper side of the rear end of the heat exchange box 34, and a rotating seat 37 that can rotate relative to the heat exchange box 34 is provided at the front and rear ends of the heat exchange box 34. A cold water pipe 38 is provided in the front and rear directions between the rotating seats 37, and a drive motor 39 is provided on the rear side of the heat exchange box 34 to drive the rotating seat 37 to rotate.

[0030] A method for using a garbage incineration dioxin treatment device, comprising:

[0031] S1. Passing the dioxin waste gas into a heat exchange mechanism for heat exchange to reduce the waste gas temperature, and removing solid particles in the dioxin waste gas through a dust removal mechanism;

[0032] S2. The dioxin waste gas is further introduced into the primary incineration chamber. Upon entering, it is fully contacted with the oil through the atomizing oil sprayer, allowing the dioxins to dissolve in the oil and the oil and dioxin waste gas to mix more evenly, thereby improving the waste gas treatment effect. The dioxin waste gas is further introduced into the secondary incineration chamber for treatment. The temperature in the primary and secondary incineration chambers is controlled at above 850 degrees Celsius.

[0033] S3. The dioxin waste gas is then sent to a cooling mechanism to reduce the possibility of dioxin regeneration, and finally adsorbed by an activated carbon adsorption mechanism.

[0034] The principle of the present invention: When used, the conventional heat exchange mechanism treats the dioxin waste gas, lowering its temperature and preventing it from causing severe aging and damage to the dust bag 11. The dioxin waste gas then enters the dust removal mechanism to remove solid particles in the waste gas, preventing the solid particles from combining with the oil in subsequent steps and causing blockage. Dioxin waste gas will enter the machine body 9 from the air inlet 13 and be filtered by the dust bag 11. When the dust bag 11 is filtering, the dust bag 11 can be cleaned by a swinging cleaning mechanism. The rack 30 is driven to swing back and forth by the driving mechanism. The rack 30 rotates through the second cam 31 so that the rack 30 compresses the second return spring 32, and the second return spring 32 can make the end face of the rack 30 always against the second cam 31, thereby realizing the reciprocating motion of the rack 30. When the rack 30 moves, it can be combined with the outer gear ring 25 so that the outer gear ring 25 rotates. The outer gear ring 25 can drive the mounting rod 26 to rotate so that the cleaning brush 27 cleans the surface of the dust bag, thereby achieving a better self-cleaning effect. The swinging cleaning mechanism can be used in the dust removal mechanism The cleaning mechanism is used during the process, and the pulse cleaning mechanism is a cleaning mechanism used when the machine is stopped. The first cam 15 is rotated to move the mounting plate 13. The movement of the mounting plate 13 causes the recoil nozzle 17 to move downward, so that the recoil nozzle enters the inner side of the dust bag to realize recoil, and the control of the jet amount is used to change the shape of the dust bag 11, so that impurities on the surface of the dust bag are separated. The recoil nozzle 17 is a recoil nozzle 17 with side air outlet. A support rod 19 is provided on the lower side of the recoil nozzle 17, and a rotating shaft 21 is provided under the support rod 19. When the rotating shaft 21 moves downward, it can rotate through the cooperation of the limit block 23 and the spiral guide groove 22, so that the block 24 at the lower part of the rotating shaft 21 moves relative to the inner surface of the dust bag 11, so that impurities on the outer surface of the dust bag 11 are separated. The exhaust gas is then fed into the air inlet of the atomizing injector 4, which is connected to the oil tank 5. During the atomization process, the oil fully contacts and absorbs dioxins, dissolving some of them in the oil. Further, during the oil spraying and incineration process, dioxins are more effectively removed. Furthermore, the dioxin-containing exhaust gas and the oil mix evenly, further enhancing dioxin removal. Temperature control is also achieved by controlling the oxygen supply, ensuring the temperature in the primary incineration chamber 2 is no less than 850 degrees Celsius. The exhaust gas then enters the secondary incineration chamber 3 for further high-temperature treatment, preventing incomplete dioxin treatment in the primary chamber 2. After high-temperature treatment, the exhaust gas enters a cooling mechanism for rapid cooling, preventing dioxin regeneration.Exhaust gas will enter from the exhaust gas inlet 35 and flow along the internal space of the heat exchange box 34. Cold water pipes are arranged in the front and back of the heat exchange box. Fins are further provided on the outside of the cold water pipe 38 to cool the exhaust gas. The driving motor can drive the rotating seat 37 to move, so that the cold water pipe 38 rotates to improve the heat exchange effect. The driving motor 39 is set at the rear side of the heat exchange box 34 to avoid high temperature affecting the life of the driving motor. Finally, the exhaust gas is sprayed to remove acidic gases and further adsorbed by the activated carbon adsorption mechanism to ensure the reliability of the treatment.

Claims

1. A garbage incineration dioxin treatment device, comprising a heat exchange mechanism, a dust removal mechanism, an incineration mechanism, a cooling mechanism, a spray mechanism and an activated carbon adsorption mechanism arranged in sequence, characterized in that: The incineration mechanism comprises an incinerator (1), wherein the incinerator (1) is provided with a first-level incineration chamber (2) and a second-level incineration chamber (3) in sequence in the direction of exhaust gas flow; an atomizing fuel injector (4) and an air inlet pipe (5) directly connected to the air outlet of a dust removal mechanism are provided at the front end of the first-level incineration chamber (2); the air inlet of the atomizing fuel injector (4) is connected to the air outlet of the dust removal mechanism; the oil inlet of the atomizing fuel injector (4) is connected to the oil tank (6); a combustible gas inlet (7) is provided on the side of the second-level incineration chamber (3); and an oxygen supply pipe (8) is provided at the bottom of the first-level incineration chamber (2) and the second-level incineration chamber (3).

2. The waste incineration dioxin treatment device according to claim 1, characterized in that: The dust removal mechanism is a bag-type dust removal mechanism, which includes a body (9), a partition (10) is provided in the middle of the body (9), a plurality of dust bags (11) are provided in the partition (10) and pass through the partition (10) with the bag openings facing upwards, an exhaust port (12) is provided on the side wall of the body (9) above the partition (10), an air inlet (13) is provided on the side wall of the body (9) below the partition (10), a slag discharge port (14) is provided in the middle of the lower end of the body (9), a swing cleaning mechanism for cleaning the dust bags (11) is provided on the lower side of the partition (10), and a pulse cleaning mechanism is provided on the upper side of the partition (10).

3. The waste incineration dioxin treatment device according to claim 2, characterized in that: The dust removal bag (11) is a dust removal bag with a circular cross-section, and a support frame (40) is provided inside the dust removal bag (11).

4. The waste incineration dioxin treatment device according to claim 2, characterized in that: The pulse cleaning mechanism includes a mounting seat (41), the upper end of the mounting seat (41) is provided with a telescopic rod (42) connected to the top of the inner side of the body (9), a first return spring (18) is provided between the telescopic rod (42), and a first cam (15) for driving the mounting plate (13) to move up and down is provided on the side wall of the body (9), the first cam (15) is located on the upper side of the mounting plate (13), an air supply pipe (16) is provided in the mounting plate (13), and a recoil nozzle (17) is evenly distributed on the lower side of the air supply pipe (16). The air delivery pipe (16) is connected to the air pump arranged outside the machine body (9) through a corrugated hose; a support rod (19) is provided on the lower side of the air delivery pipe (16); the lower end of the support rod (19) is connected to a rotating shaft (21) arranged in a supporting frame (40) through a universal joint (20); a spiral guide groove (22) is provided outside the rotating shaft (21); a limiting block (23) corresponding to the spiral guide groove (22) is provided in the supporting frame (40); and a block (24) is provided at the lower end of the rotating shaft (21) for abutting against the dust bag (11).

5. The waste incineration dioxin treatment device according to claim 2, characterized in that: The swing cleaning mechanism comprises an outer gear ring (25) arranged outside the dust removal bag (11), the outer gear ring (25) is provided with evenly distributed mounting rods (26), the mounting rods (26) are provided with cleaning brushes (27) corresponding to the dust removal bag (11), one side of the outer gear ring (25) is provided with a rack (30) for driving the outer gear ring (25) to rotate, and one side of the rack (30) is provided with a driving mechanism for driving the rack (30) to swing back and forth.

6. The device for treating dioxins from garbage incineration according to claim 5, characterized in that: The driving mechanism comprises a second cam (31) arranged at one end of the rack (30) and a second return spring (32) arranged at the other end of the rack (30). Limiting bars (33) are arranged on the outer sides of both ends of the rack (30).

7. The waste incineration dioxin treatment device according to claim 1, characterized in that: The cooling mechanism includes a heat exchange box (34) arranged at the rear side of the incinerator (1), an exhaust gas inlet (35) is provided on the lower side of the front end of the heat exchange box (34), an exhaust gas outlet (36) is provided on the upper side of the rear end of the heat exchange box (34), a rotating seat (37) that can rotate relative to the heat exchange box (34) is provided at the front and rear ends of the heat exchange box (34), a cold water pipe (38) is provided between the rotating seats (37) in the front and rear directions, and a driving motor (39) is provided on the rear side of the heat exchange box (34) to drive the rotating seat (37) to rotate.

8. A method for using a waste incineration dioxin treatment device according to any one of claims 1 to 5, characterized in that: include: S1. Passing the dioxin waste gas into a heat exchange mechanism for heat exchange to reduce the waste gas temperature, and removing solid particles in the dioxin waste gas through a dust removal mechanism; S2. The dioxin waste gas is further introduced into the primary incineration chamber. Upon entering, it is fully contacted with the oil through the atomizing oil sprayer, allowing the dioxins to dissolve in the oil and the oil and dioxin waste gas to mix more evenly, thereby improving the waste gas treatment effect. The dioxin waste gas is further introduced into the secondary incineration chamber for treatment. The temperature in the primary and secondary incineration chambers is controlled at above 850 degrees Celsius. S3. The dioxin waste gas is then sent to a cooling mechanism to reduce the possibility of dioxin regeneration, and finally adsorbed by an activated carbon adsorption mechanism.

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