RTO (Regenerative Thermal Oxidation) incinerator

Abstract

The invention discloses an RTO heat storage type incinerator which comprises an air inlet pipe, a first induced draft fan installed at the air inlet pipe, an air outlet pipe, a first reverse blowing pipe with one end connected with the air outlet pipe, a heat exchange pipe connected with the first reverse blowing pipe, a second reverse blowing pipe connected with the heat exchange pipe, three heat storage chambers with ventilation openings, a combustion chamber and a combustor. According to the heat storage type incinerator, reverse blowing of high-temperature gas can be achieved, regional reverse blowing is achieved, so that organic sediments (carbon black and tar) and part of loose inorganic salt can be effectively treated, and heat storage ceramics can be better cleaned. After high-temperature back flushing, part of substances can be decomposed, oxidized or fall off, finally fall off in the form of dust, can be received by the dust receiving box and can be sucked away by negative pressure, so that whether the whole heat storage incineration device works normally or not can be judged according to the amount of dust received by the dust receiving box, and the back flushing effect can be monitored regularly.

Description

Technical Field

[0001] The present invention relates to the technical field of incinerators, and more specifically, to an RTO regenerative incinerator. Background Art

[0002] An RTO regenerative incinerator is a device for efficiently treating medium- and high-concentration volatile organic compound (VOCs) waste gas. By heating the waste gas to a high temperature, the VOCs in the waste gas undergo an oxidation reaction to generate carbon dioxide and water vapor. At the same time, a heat storage body (such as heat storage ceramics) is used to recover the heat generated by the oxidation reaction for preheating the newly entering waste gas, thereby reducing energy consumption.

[0003] When the RTO incinerator is operating, waste gas remains inside the heat storage ceramics. After long-term use, sticky substances such as dust, by-products of VOC oxidation, inorganic salt tar, and carbon black will adhere to the channels of the heat storage ceramics. Although the conventional three-chamber RTO regenerative incinerator has a back-blowing function, the temperature of the back-blowing air flow is relatively low and cannot remove these substances. They gradually accumulate during long-term operation, resulting in a reduction in the heat transfer efficiency of the heat storage ceramics, insufficient preheating of the waste gas, and the need to consume more fuel to maintain the temperature of the combustion chamber, increasing energy consumption. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provides an RTO regenerative incinerator.

[0005] To achieve the above object, the present invention provides the following technical solution: An RTO regenerative incinerator includes an intake pipe, a first induced draft fan installed at the intake pipe, an outlet pipe, a first back-blowing pipe connected to one end of the outlet pipe, a heat exchange pipe connected to the first back-blowing pipe, a second back-blowing pipe connected to the heat exchange pipe, three heat storage chambers with ventilation openings, a combustion chamber, and a burner. The heat exchange pipe is located inside the combustion chamber. A first pipe section is connected between each ventilation opening and the intake pipe, and a second pipe section is connected between each ventilation opening and the outlet pipe. An anti-back-blowing air outlet hood is installed inside each heat storage chamber. The anti-back-blowing air outlet hood is connected to a movable pipe. The second back-blowing pipe is connected to three third pipe sections inserted into the movable pipes. A first valve is installed at the first pipe section, a second valve is installed at the second pipe section, and a third valve is installed at the third pipe section. Heat storage ceramics are installed inside the heat storage chambers.

[0006] Further, the anti-back-blowing air outlet hood blows air upward, and the top of the anti-back-blowing air outlet hood is large and the bottom is small.

[0007] Further, the three heat storage chambers are arranged in a row.

[0008] Further, the combustion chamber is located above the three heat storage chambers and is connected to all three heat storage chambers.

[0009] Further, a second induced draft fan is installed at the first back-blowing pipe.

[0010] Furthermore, a valve unit is also installed at the first backflush pipe.

[0011] Furthermore, the bottom end of the regenerator is in the shape of a hopper with a larger top and a smaller bottom, and the ventilation opening is located at the bottom end of the regenerator.

[0012] This is beneficial to the flow direction of the air flow.

[0013] Furthermore, hydraulic telescopic rods are fixed on both sides of the regenerator. The regenerator has a strip-shaped through hole, and a first convex box body capable of accommodating the backflush air outlet hood is fixed at the strip-shaped through hole. A convex pipe through which the movable pipe passes is fixed at the first convex box body. The movable pipe is fixedly connected with a movable plate, and the movable plate is connected with the hydraulic telescopic rod.

[0014] Thus, under the drive of the hydraulic telescopic rod, the position of the backflush air outlet hood can be moved.

[0015] Furthermore, the hydraulic telescopic rod and the regenerator are fixedly connected to the regenerator through a fixed clamping plate.

[0016] Furthermore, the convex pipe, the third pipe part and the movable pipe are all cylindrical pipes.

[0017] Furthermore, it also includes a dust suction main pipe. A second convex box body is fixed at the first convex box body. The backflush air outlet hood is fixedly connected with an ash receiving box that can be accommodated in the second convex box body. The ash receiving box has a strip-shaped through groove. The ash receiving box is fixedly connected with two ejector rods. One end of the second convex box body close to the movable plate is open. The second convex box body is connected with a closing plate through a tension spring; the second convex box body is connected with a dust suction branch pipe, and 3 dust suction branch pipes are all connected with the dust suction main pipe. A fourth valve is provided at the dust suction branch pipe.

[0018] Furthermore, the closing plate can close the opening of the second convex box body.

[0019] Furthermore, a negative pressure suction fan is installed at the dust suction main pipe.

[0020] Thus, the ash in the ash receiving box can be sucked by negative pressure.

[0021] Furthermore, the end of the ejector rod is hemispherical.

[0022] Furthermore, the top end of the ejector rod can abut against the closing plate so that there is a gap between the opening of the second convex box body and the closing plate.

[0023] Furthermore, there are four first convex blocks at the second convex box body, and there are second convex blocks at the closing plate. The corresponding first convex blocks and second convex blocks are connected by the tension spring.

[0024] Further, the first protruding box body, the second protruding box body and the closing plate are all made of heat-insulating materials.

[0025] Further, a fixing plate is fixed at the third pipe portion. The fixing plate is connected with a first plugging unit for plugging the gap between the third pipe portion and the movable pipe through a first spring. The movable plate is connected with a second plugging unit for plugging the gap between the protruding pipe and the movable pipe through a second spring. The first plugging unit includes a first circular ring portion and a first annular insertion portion having a first frustum-shaped surface. The second plugging unit includes a second circular ring portion and a second annular insertion portion having a second frustum-shaped surface.

[0026] Thus, the first frustum-shaped surface of the first annular insertion portion abuts against the end of the movable pipe, so as to plug the gap between the third pipe portion and the movable pipe. The second frustum-shaped surface of the second annular insertion portion abuts against the end of the protruding pipe, so as to plug the gap between the protruding pipe and the movable pipe.

[0027] Further, the first annular insertion portion is connected with the first circular ring portion.

[0028] Further, the second annular insertion portion is connected with the second circular ring portion.

[0029] Further, the fixing plate is annular.

[0030] Further, the heat exchange pipe is a spiral heat exchange pipe.

[0031] Further, two hydraulic telescopic rods are fixedly connected to each heat storage chamber.

[0032] Further, the first protruding box body is cuboid-shaped; the second protruding box body is cuboid-shaped.

[0033] Further, the width of the air outlet of the reverse blowing air hood along the direction of the movable pipe is less than or equal to one quarter of the length of the heat storage ceramics along the direction of the movable pipe.

[0034] Thus, the reverse blowing air hood can concentrate on reverse blowing a region of the heat storage ceramics.

[0035] Further, it further includes a heat-insulating protection bin. All the hydraulic telescopic rods are inserted into the heat-insulating protection bin. The three dust suction branch pipes, the three first protruding box bodies, the three second protruding box bodies, the three third pipe portions, the three protruding pipes, the three movable plates, the three first springs and the three second springs are all located in the heat-insulating protection bin.

[0036] Further, the heat-insulating protection bin includes a top plate, a bottom plate, a back plate, two side plates and four panels. Each hydraulic telescopic rod passes through one of the panels. The second reverse blowing pipe passes through one of the panels. The dust suction main pipe passes through one of the side plates.

[0037] Beneficial effects:

[0038] 1. The regenerative incinerator of the present application can achieve backwashing of high-temperature gas and backwashing in sub-regions, so as to effectively treat organic deposits (carbon black, tar) and some loose inorganic salts, thereby achieving better cleaning of the regenerative ceramics.

[0039] 2. After high-temperature backwashing, some substances in the regenerative incinerator of the present application will decompose, oxidize or fall off, and finally fall in the form of dust, which can be picked up by the ash receiving box and sucked away by negative pressure. Therefore, according to the amount of ash received by the ash receiving box, it can be judged whether the entire regenerative incineration device is working properly, and the backwashing effect can be monitored regularly. Description of the drawings

[0040] Figure 1 is a schematic diagram of the pipeline connection of the regenerative incineration device;

[0041] Figure 2 is a schematic diagram of the regenerative incineration device;

[0042] Figure 3 is a schematic diagram of another perspective when the heat insulation protection chamber of the regenerative incineration device is removed;

[0043] Figure 4 is an enlarged view of area A;

[0044] Figure 5 is a schematic diagram of the inside of the regenerative incineration device;

[0045] Figure 6 is a schematic diagram of another perspective of the inside of the regenerative incineration device;

[0046] Figure 7 is a schematic diagram of the cooperation between the movable pipe, the protruding pipe and the third pipe part of the regenerative incineration device;

[0047] Figure 8 is an enlarged view of area B;

[0048] Figure 9 is an enlarged view of area C.

[0049] For the sake of clarity, Figures 5 - 7 in, a part of the regenerative chamber is cut off, and the regenerative ceramics are not drawn in two of the regenerative chambers; and a part of one of the third pipe parts and the movable pipe is cut off.

[0050] Description of the reference numerals in the drawings: intake pipe 1; first pipe section 1.1; first valve 1.2; first induced draft fan 2; outlet pipe 3; second pipe section 3.1; second valve 3.2; first backwash pipe 4; second induced draft fan 4.1; combustion chamber 5; second backwash pipe 6; third pipe section 6.1; third valve 6.2; fixing plate 6.3; first spring 6.4; regenerator 7; ventilation opening 7.1; regenerative ceramics 7.2; hydraulic telescopic rod 7.3; backwash air outlet hood 8; movable pipe 9; movable plate 9.1; second spring 9.2; first protruding box body 10; protruding pipe 10.1; second protruding box body 11; tension spring 11.1; closing plate 11.2; dust suction branch pipe 11.3; fourth valve 11.4; first convex block 11.5; second convex block 11.6; ash receiving box 12; strip-shaped through groove 12.1; dust suction main pipe 13; first circular ring part 14.1; first annular insertion part 14.2; second circular ring part 15.1; heat insulation protection bin 16. Detailed implementation manners

[0051] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0052] The present invention provides a kind of RTO regenerative incinerator as shown in the figure, which includes an intake pipe 1, a first induced draft fan 2 installed at the intake pipe 1, an outlet pipe 3, a first backwashing pipe 4 with one end connected to the outlet pipe 3, a heat exchange pipe connected to the first backwashing pipe 4, a second backwashing pipe 6 connected to the heat exchange pipe, three regenerative chambers 7 arranged in a row and having ventilation openings 7.1, a combustion chamber 5 located above the three regenerative chambers 7 and connected to all the three regenerative chambers 7, and a burner. The heat exchange pipe is located in the combustion chamber 5. A first pipe section 1.1 is connected between each ventilation opening and the intake pipe 1, and a second pipe section 3.1 is connected between each ventilation opening and the outlet pipe 3. An anti-blowing air hood 8 is installed in each regenerative chamber 7. The anti-blowing air hood 8 is connected with a movable pipe 9. The second backwashing pipe 6 is connected with three third pipe sections 6.1 inserted into the movable pipe 9. A first valve 1.2 is installed at the first pipe section 1.1, a second valve 3.2 is installed at the second pipe section 3.1, and a third valve 6.2 is installed at the third pipe section 6.1. A regenerative ceramic 7.2 is installed in the regenerative chamber 7. Hydraulic expansion rods 7.3 are fixed on both sides of the regenerative chamber 7. The regenerative chamber 7 has a strip-shaped through hole, and a first convex box body 10 capable of accommodating the anti-blowing air hood 8 is fixed at the strip-shaped through hole. A protruding pipe 10.1 through which the movable pipe 9 passes is fixed at the first convex box body 10. The movable pipe 9 is fixedly connected with a movable plate 9.1, and the movable plate 9.1 is connected with the hydraulic expansion rod 7.3. It also includes a dust suction main pipe 13. A second convex box body 11 is fixed at the first convex box body 10. The anti-blowing air hood 8 is fixedly connected with an ash receiving box 12 capable of being accommodated in the second convex box body 11. The ash receiving box 12 has a strip-shaped through groove 12.1. The ash receiving box 12 is fixedly connected with two ejector rods. One end of the second convex box body 11 close to the movable plate 9.1 is open. The second convex box body 11 is connected with a closing plate 11.2 capable of closing the open end of the second convex box body 11 through a tension spring 11.1. The second convex box body 11 is connected with a dust suction branch pipe 11.3, and all the 3 dust suction branch pipes 11.3 are connected with the dust suction main pipe 13. A fourth valve 11.4 is provided at the dust suction branch pipe 11.3.

[0053] There are four first bumps 11.5 on the second protruding box body 11, and a second bump 11.6 on the closing plate 11.2. A tension spring 11.1 is connected between the corresponding first bump 11.5 and the second bump 11.6. A circular fixing plate 6.3 is fixed on the third pipe portion 6.1. The fixing plate 6.3 is connected by a first spring 6.4 to a first blocking unit that blocks the gap between the third pipe portion 6.1 and the movable pipe 9. The movable plate 9.1 is connected by a second spring 9.2 to a second blocking unit that blocks the gap between the protruding pipe 10.1 and the movable pipe 9. The first blocking unit includes a first circular ring portion 14.1 and a first annular insertion portion 14.2 having a first frustum-shaped surface connected to the first circular ring portion 14.1. The second blocking unit includes a second circular ring portion 15.1 and a second annular insertion portion having a second frustum-shaped surface connected to the second circular ring portion 15.1. The heat exchange pipe is a spiral heat exchange pipe. Each regenerative chamber 7 is fixedly connected with two hydraulic telescopic rods 7.3. The first protruding box body 10 is rectangular parallelepiped-shaped; the second protruding box body 11 is rectangular parallelepiped-shaped. The width of the air outlet of the reverse blowing air hood 8 along the direction of the movable pipe 9 is less than or equal to one-fourth of the length of the regenerative ceramics 7.2 along the direction of the movable pipe 9.

[0054] The regenerative incineration device further includes a heat insulation protection chamber 16. All the hydraulic telescopic rods 7.3 are inserted into the heat insulation protection chamber 16. Three ash suction branch pipes 11.3, three first protruding box bodies 10, three second protruding box bodies 11, three third pipe portions 6.1, three protruding pipes 10.1, three movable plates 9.1, three first springs 6.4 and three second springs 9.2 are all located in the heat insulation protection chamber 16. The heat insulation protection chamber 16 includes a top plate, a bottom plate, a back plate, two side plates and four panels. Each hydraulic telescopic rod 7.3 passes through one of the panels, the second reverse blowing pipe 6 passes through one of the panels, and the ash suction main pipe 13 passes through one of the side plates.

[0055] Working principle: The regenerative incineration device of the present application is similar to a conventional three-chamber regenerative incineration device. The regenerative chambers can be alternately used for heat storage, heat release and reverse blowing. Figures 5 - 7 In the figure, the reverse blowing air hoods corresponding to the three regenerative chambers are in different positions for the sake of simple illustration to show the internal structure of the regenerative chambers and the reverse blowing air hoods, etc. During actual use, when the reverse blowing air hood of one of the regenerative chambers is pushed out of the first protruding box body, the reverse blowing air hoods of the other two regenerative chambers are located in the first protruding box body and do not work.

[0056] The backflush structure of this application is different from the conventional three-chamber regenerative incineration device. The main difference is that in this application, a part of the clean gas (the treated exhaust gas) is diverted from the exhaust of the treated exhaust gas. This part of the gas passes through the first backflush pipe, the heat exchange pipe (the gas is heated inside the heat exchange pipe), and the second backflush pipe. Through the control of the third valve, it can pass through one of the third pipe parts and through the movable pipe, so that the backflush air hood is aligned with the regenerative ceramic and blows upward, thereby realizing the backflush of the regenerative ceramic. And by adjusting the length of the hydraulic telescopic rod, the position of the backflush air hood below the regenerative ceramic can be adjusted, so that high-temperature backflushing of different positions of the regenerative ceramic can be realized. And during this high-temperature backflushing process, some organic substances will be reacted into gases and blown away upward, and some substances will be decomposed into powders, so that the regenerative ceramic falls off and falls into the ash receiving box.

[0057] And due to the action of the first spring and the second spring, the first sealing unit and the second sealing unit can seal the gaps between the protruding pipe and the movable pipe and between the movable pipe and the third pipe part, avoiding heat loss.

[0058] When high-temperature backflushing is not required, the backflush air hood can be located inside the first protruding box body, so as not to affect the normal heat storage and heat release of the regenerative ceramic. The backflush operation can be set according to the actual situation. For example, a high-temperature backflush operation is performed after one or several heat storage and heat release cycles. And after a certain time is set, the ejector rod at the ash receiving box can be used to push open the closing plate at the second protruding box body, and by means of negative pressure suction (the strip-shaped through groove at the ash receiving box and the gap between the second protruding box body and the closing plate are conducive to negative pressure suction to suck the ash in the ash receiving box away), the ash in the ash receiving box is sucked away. Thus, according to whether the amount of ash sucked in one ash suction cycle is within the normal range, it is judged whether the entire system is working properly and whether the effect of high-temperature backflushing is normal.

[0059] Although the present invention has been illustrated and described with respect to the preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. An RTO regenerative incinerator, characterized in that: It includes an air inlet pipe, a first induced draft fan installed at the air inlet pipe, an air outlet pipe, a first back-blowing pipe connected to the air outlet pipe at one end, a heat exchange pipe connected to the first back-blowing pipe, a second back-blowing pipe connected to the heat exchange pipe, three heat storage chambers with vents, a combustion chamber and a burner, wherein the heat exchange pipe is located in the combustion chamber, a first pipe portion is connected between each vent and the air inlet pipe, a second pipe portion is connected between each vent and the air outlet pipe, a back-blowing air outlet hood is installed in each heat storage chamber, the back-blowing air outlet hood is connected to a movable pipe, the second back-blowing pipe is connected to three third pipe portions inserted into the movable pipes, a first valve is installed at the first pipe portion, a second valve is installed at the second pipe portion, a third valve is installed at the third pipe portion, and heat storage ceramics are installed in the heat storage chamber.

2. The RTO regenerative incinerator according to claim 1, characterized in that: Hydraulic telescopic rods are fixed on both sides of the heat storage chamber, the heat storage chamber has a strip through hole, a first protruding box body capable of accommodating the back-blowing air hood is fixed at the strip through hole, a protruding tube passed by a movable tube is fixed at the first protruding box body, the movable tube is fixedly connected with a movable plate, and the movable plate is connected to the hydraulic telescopic rod.

3. The RTO regenerative incinerator according to claim 2, characterized in that: It also includes an ash suction main pipe, a second protruding box body is fixed at the first protruding box body, the back-blowing air hood is fixedly connected to an ash receiving box that can be accommodated in the second protruding box body, the ash receiving box has a strip-shaped through groove, the ash receiving box is fixedly connected to two push rods, the second protruding box body is open at one end close to the movable plate, and the second protruding box body is connected to a closing plate through a tension spring; the second protruding box body is connected to an ash suction branch pipe, the three ash suction branch pipes are all connected to the ash suction main pipe, and the ash suction branch pipe is provided with a fourth valve.

4. The RTO regenerative incinerator according to claim 3, characterized in that: The second protruding box body has four first protrusions, the closing plate has a second protrusion, and the tension spring is connected between the corresponding first protrusions and the second protrusions.

5. The RTO regenerative incinerator according to claim 2, characterized in that: A fixed plate is fixed at the third tube portion, and the fixed plate is connected to a first blocking unit for blocking the gap between the third tube portion and the movable tube via a first spring, and the movable plate is connected to a second blocking unit for blocking the gap between the protruding tube and the movable tube via a second spring; the first blocking unit includes a first annular portion and a first annular insertion portion having a first frustoconical surface, and the second blocking unit includes a second annular portion and a second annular insertion portion having a second frustoconical surface.

6. The RTO regenerative incinerator according to claim 1, characterized in that: The heat exchange tube is a spiral heat exchange tube.

7. The RTO regenerative incinerator according to claim 2, characterized in that: Each heat storage chamber is fixedly connected with two hydraulic telescopic rods.

8. The RTO regenerative incinerator according to claim 3, characterized in that: The first protruding box body is in the shape of a rectangular parallelepiped; the second protruding box body is in the shape of a rectangular parallelepiped.

9. The RTO regenerative incinerator according to claim 3, characterized in that: The width of the air outlet of the back-blowing air outlet cover along the direction of the movable tube is less than or equal to one quarter of the length of the heat storage ceramic along the direction of the movable tube.

10. The RTO regenerative incinerator according to claim 3, characterized in that: It also includes a heat-insulating protection bin, in which all hydraulic telescopic rods are inserted, and three ash suction branches, three first protruding box bodies, three second protruding box bodies, three third pipe parts, three protruding tubes, three movable plates, three first springs and three second springs are all located in the heat-insulating protection bin.

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