A four-chamber RTO burner and its working method

Abstract

The present invention discloses a four-chamber RTO burner and a working method thereof, comprising an equipment box, wherein a plurality of groups of metal partitions are arranged in the equipment box, and the metal partitions divide the space in the equipment box into a combustion chamber, a waste heat recovery chamber, a component chamber and an exhaust gas recovery chamber, wherein two groups of combustion chambers are symmetrically opened, the waste heat recovery chamber and the component chamber are opened at the bottom of the equipment box, and the exhaust gas recovery chamber is opened above the waste heat recovery chamber away from the component chamber. A heat storage body is installed in the middle of the combustion chamber, and a combustion mechanism is installed at the connecting position of the two groups of combustion chambers, and the combustion mechanism includes two groups of branch gas pipes and nozzles at the ends of the two groups of branch gas pipes, and the nozzles are extended to the central part of the combustion chamber and bent upward, and a guide ring is arranged above the combustion chamber, and a group of cross-shaped gas distribution pipes are arranged in the middle of the guide ring. The four-chamber RTO burner and the working method thereof are easy to ensure the combustion effect, effectively prevent the heat storage body from being blocked, and are recommended for wide use.

Description

Technical Field

[0001] The invention belongs to the technical field of RTO burners, and in particular relates to a four-chamber RTO burner and a working method thereof. Background Art

[0002] Incinerators are also called thermal oxidizers, which are roughly divided into four categories: direct-fired thermal oxidizers (also called afterburners), heat recovery thermal oxidizers, regenerative thermal oxidizers (RTO) and flameless thermal oxidizers (FTO). These four types of thermal oxidizers all operate according to the principles of the above-mentioned thermal oxidation process, effectively strengthening the thermal oxidation reaction between oxygen and waste liquid and waste gas pollutants. Regenerative thermal incinerators are also called regenerative thermal oxidizers, and their English name is "Regenerative Thermal Oxidizer", abbreviated as "RTO". The principle is to heat the organic waste gas to above 760 degrees Celsius, so that the VOC in the waste gas is oxidized and decomposed into carbon dioxide and water. The high-temperature gas produced by oxidation flows through a special ceramic heat storage body, causing the ceramic body to heat up and "storage heat". This "heat storage" is used to preheat the subsequent organic waste gas. Thereby saving fuel consumption for heating the waste gas. The ceramic heat storage body should be divided into two or more zones or chambers. Each heat storage chamber undergoes the procedures of heat storage-heat release-cleaning in turn, over and over again, and works continuously. After the heat storage chamber "releases heat", part of the clean exhaust gas that has been treated and qualified should be introduced immediately to clean the heat storage chamber (to ensure that the VOC removal rate is above 95%). Only after the cleaning is completed can the "heat storage" procedure be entered.

[0003] When the existing RTO burner is working, it is easy to form deposits on the heat storage body, and these deposits are easy to cause blockage of the heat storage body; and because the air flow temperature of the purge device is low, it is difficult to completely burn the asphalt, resulting in the emission of black smoke. Summary of the invention

[0004] The object of the present invention is to provide a four-chamber RTO burner and a working method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a four-chamber RTO burner, comprising an equipment box;

[0006] A plurality of groups of metal partitions are arranged in the equipment box, and the metal partitions divide the space in the equipment box into a combustion chamber, a waste heat recovery chamber, a component chamber and an exhaust gas recovery chamber, wherein two groups of combustion chambers are symmetrically provided, and the bottoms of the two groups of combustion chambers are interconnected, the waste heat recovery chamber and the component chamber are provided at the bottom of the equipment box, and the exhaust gas recovery chamber is provided above the waste heat recovery chamber on the side away from the component chamber;

[0007] A heat storage body is installed in the middle of the combustion chamber, and a combustion mechanism is installed at the connecting position of the two groups of the combustion chambers, the combustion mechanism includes two groups of branch gas pipes and nozzles at the ends of the two groups of branch gas pipes, and the nozzles extend to the center of the combustion chamber and bend upwards, a guide ring is arranged above the combustion chamber, a group of cross-shaped air distribution pipes are arranged in the middle of the guide ring, and the bottom end of the guide ring is structured in a conical surface, and an air supply groove is opened on the conical surface, and a group of connecting pipes are provided in the middle of the cross-shaped air distribution pipes, wherein the connecting pipes include at least two groups of air inlet interfaces;

[0008] A group of exhaust pipes are installed in the waste heat recovery bin, one end of the exhaust pipe is connected to a group of air intake hoppers connected to the combustion bin, and the other end of the exhaust pipe extends out of the waste heat recovery bin and docks with a group of chimneys, a group of spiral heat exchange pipes are arranged around the outer edge of the exhaust pipe, one end of the spiral heat exchange pipe is connected to the outside of the equipment box, and the other end is provided with a group of extension pipes extending into the component bin, a group of blowing pumps are installed in the component bin, the blowing pumps are docked with the extension pipes, and a group of blowing pipes extending into the combustion bin are arranged above the blowing pump, and a blowing ring group docking with the blowing pipes is installed below the combustion bin.

[0009] Preferably, a group of blowers are installed on the top of the equipment box, and two groups of air supply ducts connected to the combustion chamber are symmetrically arranged on the blower, and the air supply ducts are connected to a group of air inlet interfaces of the guide ring.

[0010] Preferably, a vacuum pump is installed at the bottom of the waste gas recovery bin, a docking tube connected to the exhaust pipe is provided at the bottom of the vacuum pump, and a return pipe extending into the top of the combustion bin is provided at the top of the vacuum pump, and the return pipe has two groups of branch pipes respectively connected to the other group of air inlet interfaces on the two groups of guide rings.

[0011] Preferably, a group of electrically controlled valves are provided on the portion of the exhaust duct extending outside the equipment box.

[0012] Preferably, the blowing ring group includes multiple groups of blowing rings with consistent axes and located in the same horizontal plane, and the multiple groups of blowing rings are connected by two groups of symmetrically distributed support frames, and the other end of the support frame is fixed to the inner wall of the combustion chamber.

[0013] Preferably, a plurality of groups of air nozzles are arranged in a circular array above the plurality of groups of air blowing rings constituting the air blowing ring group, and the plurality of groups of air nozzles are all directed toward the heat storage body.

[0014] A method for operating a four-chamber RTO burner comprises the following steps:

[0015] S1. Docking of external exhaust pipe;

[0016] S2, auxiliary supply of external gas, start of the air pump and adjustment of the flow valve at the spiral heat exchange tube;

[0017] S3, internal ignition, starting of the combustion mechanism and introduction of exhaust gas from the blower, and combustion of flue gas in the combustion chamber;

[0018] S4, flue gas recovery and re-combustion, selective closing of the electric control valve and start-up of the vacuum pump;

[0019] S5. Clean the heat storage body and increase the air pump at the air pump;

[0020] S6, exhaust, control the opening and closing of the electric control valve to discharge the gas from the chimney.

[0021] Preferably, ignition is carried out in S3, and a temperature sensor is provided in the combustion chamber.

[0022] The technical effects and advantages of the present invention are as follows: the four-chamber RTO burner and its working method, a group of blowing ring groups are installed under the heat storage body, when the blowing pump is working, the external air flow is introduced into the blowing pipe through the spiral heat exchange tube, and finally sprayed out from the air supply nozzle on the blowing ring group, so as to realize the reverse blowing of the heat storage body and reduce the surface adhesion; and thanks to the spiral heat exchange tube being wound around the periphery of the exhaust pipe, the air pumped in through the spiral heat exchange tube can realize heat exchange in the exhaust pipe, on the one hand, cooling the exhaust pipe, on the other hand, increasing the air temperature in the spiral heat exchange tube, thereby ensuring the blowing temperature and realizing sufficient combustion; thanks to the guide rings arranged in the two groups of combustion chambers of the equipment box having different air inlet interfaces, the flue gas can be re-introduced when cooperating with the vacuum pump and the branch pipe on the return pipe to supply air, further ensuring sufficient combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0025] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 4 It is the work flow chart of the present invention.

[0027] In the figure: 1 equipment box, 101 combustion chamber, 102 waste heat recovery chamber, 103 component chamber, 104 exhaust gas recovery chamber, 2 heat storage body, 3 combustion mechanism, 4 guide ring, 401 cross-shaped air distribution pipe, 402 air supply groove, 5 blower, 501 air supply pipe, 6 exhaust pipe, 601 air intake hopper, 602 electric control valve, 7 exhaust pump, 701 return pipe, 702 branch pipe, 8 spiral heat exchange pipe, 801 extension pipe, 9 blowing pump, 901 blowing pipe, 10 blowing ring group, 11 chimney. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this document are based on the up, down, left, right, front, back, inside and outside directions in the figures shown in the present invention, and are explained here together.

[0030] The present invention provides Figure 1-4 A four-chamber RTO burner shown includes an equipment box 1;

[0031] The equipment box 1 is provided with multiple groups of metal partitions, and the metal partitions divide the space in the equipment box 1 into a combustion chamber 101, a waste heat recovery chamber 102, a component chamber 103 and an exhaust gas recovery chamber 104, wherein the combustion chamber 101 is symmetrically provided with two groups, and the bottoms of the two groups of the combustion chambers 101 are interconnected, the waste heat recovery chamber 102 and the component chamber 103 are provided at the bottom of the equipment box 1, and the exhaust gas recovery chamber 104 is provided above the waste heat recovery chamber 102 away from the component chamber 103;

[0032] A heat storage body 2 is installed in the middle of the combustion bin 101, and a combustion mechanism 3 is installed at the connecting position of the two groups of the combustion bins 101. The combustion mechanism 3 includes two groups of branch gas pipes and nozzles at the ends of the two groups of branch gas pipes, and the nozzles extend to the center of the combustion bin 101 and bend upward. A guide ring 4 is arranged above the combustion bin 101, and a group of cross-shaped air distribution pipes 401 are arranged in the middle of the guide ring 4, and the bottom end of the guide ring 4 is a conical surface, and an air supply groove 402 is opened on the conical surface. The middle part of the cross-shaped air distribution pipe 401 is provided with a group of connecting pipes, wherein the connecting pipes include at least two groups of air inlet interfaces. Thanks to the different air inlet interfaces provided in the two groups of combustion bins 101 of the equipment box 1, the flue gas can be re-introduced when the air is supplied by the exhaust pump 7 and the branch pipe 702 on the return pipe 701, thereby further ensuring sufficient combustion.

[0033] A group of exhaust pipes 6 are installed in the waste heat recovery bin 102, one end of the exhaust pipe 6 is connected to a group of air intake hoppers 601 connected to the combustion bin 101, and the other end of the exhaust pipe 6 extends out of the waste heat recovery bin 102 and docks with a group of chimneys 11. A group of spiral heat exchange tubes 8 are arranged around the outer edge of the exhaust pipe 6. Thanks to the spiral heat exchange tubes 8 being wound around the periphery of the exhaust pipe 6, the air pumped in through the spiral heat exchange tubes 8 can achieve heat exchange at the exhaust pipe 6, which on the one hand cools the exhaust pipe 6 and on the other hand increases the air temperature in the spiral heat exchange tubes 8, thereby ensuring the blowing temperature and achieving sufficient combustion. The spiral heat exchange tubes 8 One end is connected to the outside of the equipment box 1, and the other end is provided with a group of extension pipes 801 extending into the component bin 103, a group of blowing pumps 9 are installed in the component bin 103, the blowing pump 9 is docked with the extension pipe 801, and a group of blowing pipes 901 extending into the combustion bin 101 are arranged above the blowing pump 9, and a blowing ring group 10 docking with the blowing pipe 901 is installed below the combustion bin 101, and a group of blowing ring groups 10 are installed below the heat storage body 2. When the blowing pump 9 is working, the external air flow is introduced into the blowing pipe 901 through the spiral heat exchange tube 8, and finally sprayed out from the air supply nozzle on the blowing ring group 10, so as to realize the reverse blowing of the heat storage body 2 and reduce surface adhesion.

[0034] Specifically, a group of blowers 5 are installed on the top of the equipment box 1, and two groups of air supply ducts 501 connected to the combustion chamber 101 are symmetrically arranged on the blower 5, and the air supply ducts 501 are connected to a group of air inlet interfaces of the guide ring 4.

[0035] Specifically, a group of vacuum pumps 7 are installed at the bottom of the exhaust gas recovery chamber 104, and a docking tube connected to the exhaust pipe 6 is provided at the bottom of the vacuum pump 7, and a group of return pipes 701 extending into the top of the combustion chamber 101 are provided at the top of the vacuum pump 7. The return pipe 701 has two groups of branch pipes 702 respectively connected to another group of air inlet interfaces on the two groups of guide rings 4.

[0036] Specifically, a group of electric control valves 602 are provided on the portion of the exhaust pipe 6 extending outside the equipment box 1 .

[0037] Specifically, the blowing ring group 10 includes multiple groups of blowing rings with consistent axes and in the same horizontal plane, and the multiple groups of blowing rings are connected by two groups of symmetrically distributed support frames, and the other ends of the support frames are fixed to the inner wall of the combustion chamber 101.

[0038] Specifically, a plurality of groups of air nozzles are arranged in a circular array above the plurality of groups of air blowing rings constituting the air blowing ring group 10 , and the plurality of groups of air nozzles are all directed toward the heat storage body 2 .

[0039] A method for operating a four-chamber RTO burner comprises the following steps:

[0040] S1. Docking of external exhaust pipe;

[0041] S2, auxiliary supply of external gas, start of the air blowing pump 9 and adjustment of the flow valve at the spiral heat exchange tube 8;

[0042] S3, internal ignition, starting of the combustion mechanism 3 and introduction of exhaust gas from the blower 5, and combustion of smoke in the combustion chamber 101;

[0043] S4, flue gas recovery and re-combustion, selective closing of the electric control valve 602 and starting of the vacuum pump 7;

[0044] S5, cleaning of the heat storage body 2, and increasing the pumping air at the air pump 9;

[0045] S6, exhaust, control the opening and closing of the electric control valve 602 to discharge the gas from the chimney 11. In specific implementation, the emission of flue gas can be detected by a sensor, and the flue gas that meets the standard is discharged from the chimney 11, otherwise the electric control valve 602 is closed and the vacuum pump 7 is started for re-combustion.

[0046] Specifically, during the ignition in S3, a temperature sensor is provided in the combustion chamber 101 (the temperature sensor may be selected but is not limited to the WP-201 temperature sensor). During the specific implementation, the temperature sensor model is selected according to the needs of the user.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A four-chamber RTO burner, comprising an equipment box (1); Features: A plurality of groups of metal partitions are arranged in the equipment box (1), and the metal partitions divide the space in the equipment box (1) into a combustion chamber (101), a waste heat recovery chamber (102), a component chamber (103), and an exhaust gas recovery chamber (104), wherein two groups of combustion chambers (101) are symmetrically provided, and the bottoms of the two groups of combustion chambers (101) are interconnected, the waste heat recovery chamber (102) and the component chamber (103) are provided at the bottom of the equipment box (1), and the exhaust gas recovery chamber (104) is provided above the waste heat recovery chamber (102) on a side away from the component chamber (103); A heat storage body (2) is installed in the middle of the combustion chamber (101), and a combustion mechanism (3) is installed at the connecting position of the two groups of combustion chambers (101), the combustion mechanism (3) comprises two groups of branch gas pipes and nozzles at the ends of the two groups of branch gas pipes, and the nozzles extend to the central part of the combustion chamber (101) and bend upwards, a guide ring (4) is arranged above the combustion chamber (101), a group of cross-shaped gas distribution pipes (401) are arranged in the middle of the guide ring (4), and the bottom end of the guide ring (4) is structured in a conical surface, and an air supply groove (402) is opened on the conical surface, and a group of connecting pipes are provided in the middle of the cross-shaped gas distribution pipe (401), wherein the connecting pipes include at least two groups of air inlet interfaces; A group of exhaust pipes (6) are installed in the waste heat recovery bin (102), one end of the exhaust pipe (6) is connected to a group of air inlet hoppers (601) connected to the combustion bin (101), and the other end of the exhaust pipe (6) extends out of the waste heat recovery bin (102) and is connected to a group of chimneys (11), a group of spiral heat exchange pipes (8) are arranged around the outer edge of the exhaust pipe (6), one end of the spiral heat exchange pipe (8) is connected to the outside of the equipment box (1), and the other end is provided with a group of extension pipes (801) extending into the component bin (103), a group of air blowing pumps (9) are installed in the component bin (103), the air blowing pumps (9) are connected to the extension pipes (801), and a group of air blowing pipes (901) extending into the combustion bin (101) are arranged above the air blowing pumps (9), and an air blowing ring group (10) connected to the air blowing pipes (901) is installed below the combustion bin (101); A set of blowers (5) is installed on the top of the equipment housing (1), and two sets of air supply pipes (501) connected to the combustion chamber (101) are symmetrically arranged on the blower (5), and the air supply pipes (501) are connected to a set of air inlet interfaces of the guide ring (4); A set of air pumps (7) are installed at the bottom of the exhaust gas recovery chamber (104), a butt joint pipe connected to the exhaust pipe (6) is arranged at the bottom of the air pump (7), and a set of return pipes (701) extending into the top of the combustion chamber (101) are arranged at the top of the air pump (7), and the return pipes (701) are provided with two sets of branch pipes (702) respectively connected to the other set of air inlet interfaces on the two sets of guide rings (4).

2. A four-chamber RTO burner according to claim 1, characterized in that: A group of electric control valves (602) are provided on the portion of the exhaust pipe (6) extending outside the equipment box (1).

3. A four-chamber RTO burner according to claim 1, characterized in that: The blowing ring group (10) comprises a plurality of blowing rings having the same axis and being located in the same horizontal plane, and the plurality of blowing rings are connected by two symmetrically distributed supporting frames, the other end of the supporting frame being fixed to the inner wall of the combustion chamber (101).

4. A four-chamber RTO burner according to claim 3, characterized in that: A plurality of groups of air blowing nozzles are arranged in a circular array above the plurality of groups of air blowing rings constituting the air blowing ring group (10), and the plurality of groups of air blowing nozzles are all directed toward the heat storage body (2).

5. A method for operating a four-chamber RTO burner, using the four-chamber RTO burner according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Docking of external exhaust pipe; S2, auxiliary supply of external gas, starting of the air blowing pump (9) and adjustment of the flow valve at the spiral heat exchange tube (8); S3, internal ignition, starting of the combustion mechanism (3) and introduction of exhaust gas from the blower (5), and combustion of flue gas in the combustion chamber (101); S4, flue gas recovery and re-combustion, selective closing of the electric control valve (602) and starting of the vacuum pump (7); S5, cleaning the heat storage body (2), and increasing the pumping pressure at the air pump (9); S6, exhaust, control the opening and closing of the electric control valve (602) to discharge the gas from the chimney (11).

6. The operating method of a four-chamber RTO burner according to claim 5, characterized in that: In S3, a temperature sensor is provided in the combustion chamber (101).

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