Heat accumulating type oxidation burner

Abstract

The utility model relates to a heat accumulating type oxidation combustor which comprises a combustion chamber, a first heat accumulating chamber, a second heat accumulating chamber, a change-over valve, a first valve, a second valve, a third valve, a fourth valve and a pipeline. An igniter is arranged at the top of the combustion chamber; two sides of the combustion chamber are respectively connected with a regenerative chamber I and a regenerative chamber II; a first heat storage body is arranged in the first heat storage chamber, and a second heat storage body is arranged in the second heat storage chamber. The heat accumulator is provided with a curve-shaped gas channel, the heat exchange time can be prolonged, and the heat exchange efficiency is improved; the upward rotation directions of the curve-shaped gas channels in the odd-numbered layers are opposite to those of the curve-shaped gas channels in the even-numbered layers, so that turbulent flow of airflow can be effectively counteracted, and airflow disturbance is reduced; and the grating is arranged above the heat accumulator, so that turbulent disturbance of airflow can be eliminated, the airflow can flow stably, and the combustion efficiency of the VOCs is improved.

Description

Technical Field

[0001] This utility model relates to the field of VOCs-containing waste gas treatment technology, specifically to a regenerative oxidizing burner. Background Technology

[0002] A regenerative thermal oxidizer (RTO) typically contains a combustion chamber and two regenerator chambers (left and right). The regenerator chambers are filled with heat storage materials. Its working principle is as follows: VOC-containing gas is drawn into the left regenerator chamber by a fan and then enters the combustion chamber. Ignition causes the VOCs to burn and decompose, producing high-temperature CO2 and H2O. The high-temperature combustion exhaust gas passes through the right regenerator chamber, where heat exchange raises the temperature of the heat storage material. The exhaust gas then decreases in temperature before being discharged. In the next cycle, the VOC-containing waste gas enters the right regenerator chamber through a pipe and undergoes heat exchange as it passes through the right regenerator material. The increased temperature of the VOC-containing waste gas then enters the combustion chamber for combustion. The exhaust gas exchanges heat with the heat storage material in the left regenerator chamber before being discharged. This cycle repeats continuously. The VOC-containing waste gas is preheated by the high-temperature heat storage material before combustion in the combustion chamber. This preheated, high-temperature VOC-containing waste gas requires less fuel during combustion, thus achieving fuel savings.

[0003] Existing heat storage devices have low heat exchange efficiency, resulting in a large amount of unutilized heat in the exhaust gas and high fuel consumption. This invention improves the design of existing heat storage devices, increasing heat exchange efficiency and reducing fuel consumption. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a regenerative oxidation burner, comprising a combustion chamber, a first regenerative chamber, a second regenerative chamber, a switching valve, a first valve, a second valve, a third valve, a fourth valve, and pipelines.

[0005] An igniter is installed at the top of the combustion chamber, and regenerator chamber one and regenerator chamber two are connected to the two sides of the combustion chamber respectively.

[0006] Heat storage chamber one is equipped with heat storage body one, and heat storage chamber two is equipped with heat storage body two.

[0007] Both heat storage body one and heat storage body two are cylindrical, and they have the same structure, material and size.

[0008] The core of the heat storage body is a cylindrical heat storage material, which has a straight gas channel parallel to the central axis. Multiple layers of tubular heat storage material are fitted on the outside of the core, and the tubular heat storage material has a curved gas channel. The curved gas channel rotates upward from the lower annular surface of the tubular heat storage material to the upper annular surface.

[0009] The core of the heat storage body is a cylindrical heat storage material, which has a straight gas channel parallel to the central axis. Multiple layers of tubular heat storage material are fitted on the outside of the core, and the tubular heat storage material has a curved gas channel. The curved gas channel rotates upward from the lower annular surface of the tubular heat storage material to the upper annular surface.

[0010] Counting from the outside in, the curved gas channels of the odd-numbered layers (e.g., the first layer from the outside in) of the tubular heat storage material layer rotate counterclockwise upwards along the pipe wall (viewed from top to bottom) to the upper annular surface, while the curved gas channels of the even-numbered layers (e.g., the second layer from the outside in) rotate clockwise upwards along the pipe wall (viewed from top to bottom) to the upper annular surface. The curved gas channels extend the contact time between the gas and the heat storage material, improving heat exchange efficiency and thermal energy utilization. The gas turbulence in the odd-numbered and even-numbered layers cancels each other out, allowing VOC-containing waste gas to smoothly enter the combustion chamber for stable combustion, thus improving combustion efficiency.

[0011] The air inlet pipe is connected to the air inlet of the switching valve. The two air outlets of the switching valve are connected to pipe one and pipe two, respectively. Pipe one is connected to the bottom of heat storage chamber one, and pipe two is connected to the bottom of heat storage chamber two. Valve one is installed on pipe one, and valve two is installed on pipe two.

[0012] The switching valve has one inlet and two outlets. Gas entering the switching valve can only flow out from one outlet; operating the switching valve allows the gas to flow out from the other outlet.

[0013] One end of pipe three is connected to the bottom of heat storage chamber one, and the other end is connected to the exhaust pipe; valve three is installed on pipe three.

[0014] One end of pipe 4 is connected to the bottom of heat storage chamber 2, and the other end is connected to the exhaust pipe; valve 4 is installed on pipe 4.

[0015] The exhaust pipe connects the fan and the chimney, and the exhaust gas after combustion is discharged through the exhaust pipe, the fan, and the chimney.

[0016] Furthermore, a grid one is installed above the heat storage body one, and a grid two is installed above the heat storage body two; the grid one and grid two have the same structure, material, and size, and the height of the mesh holes is 2cm to 5cm.

[0017] The beneficial effects of this invention are as follows: This invention designs the heat storage material as a multi-layered tubular structure, with each tubular heat storage material layer featuring curved gas channels. This extends the heat exchange time, improves heat exchange efficiency, and increases thermal energy utilization. Furthermore, the curved gas channels in odd-numbered layers rotate in the opposite direction to those in even-numbered layers, effectively counteracting gas turbulence, reducing airflow disturbance, and ensuring that VOC-containing waste gas enters the combustion chamber smoothly for combustion, thus improving combustion efficiency. The grid installed above the heat storage body further eliminates airflow turbulence, ensuring smooth airflow and improving VOC combustion efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a top view schematic diagram of the heat storage body of this utility model.

[0020] Figure 3 This is a schematic diagram of the curved gas channel orientation of the odd-numbered tubular heat storage material layer (front view) of this utility model.

[0021] Figure 4 This is a schematic diagram of the curved gas channel orientation of the even-numbered tubular heat storage material layer (front view) of this utility model.

[0022] In the diagram, 1 is the combustion chamber, 1-1 is the igniter; 2 is the regenerator chamber one, 2-1 is the regenerator body one, 2-2 is the cylindrical regenerator material one, 2-3 is the straight gas channel one, 2-4 is the tubular regenerator material layer one, 2-5 is the curved gas channel one; 3 is the regenerator chamber two, 3-1 is the regenerator body two, 3-2 is the cylindrical regenerator material two, 3-3 is the straight gas channel two, 3-4 is the tubular regenerator material layer two, 3-5 is the curved gas channel two; 4 is the switching valve; 5-1 is the valve one, 5-2 is the valve two, 5-3 is the valve three, 5-4 is the valve four; 6-1 is the intake pipe, 6-2 is the exhaust pipe; 7-1 is the pipe one, 7-2 is the pipe two, 7-3 is the pipe three, 7-4 is the pipe four. Detailed Implementation

[0023] like Figure 1 As shown, a regenerative oxidizer includes a combustion chamber 1, a regenerative chamber 1 2, a regenerative chamber 2 3, a switching valve 4, a valve 1 5-1, a valve 2 5-2, a valve 3 5-3, a valve 4 5-4, and pipes.

[0024] An igniter 1-1 is installed on the top of combustion chamber 1, and heat storage chamber 2 and heat storage chamber 3 are connected to the two sides of combustion chamber 1 respectively.

[0025] Heat storage chamber 1 is equipped with heat storage body 2-1, and heat storage chamber 2 is equipped with heat storage body 3-1.

[0026] Heat storage body 1 2-1 and heat storage body 2 3-1 are cylindrical, and their structures, materials and dimensions are the same.

[0027] like Figures 2-4 As shown, the core of the heat storage body 2-1 is a cylindrical heat storage material 2-2, which has a straight gas channel 2-3 parallel to the central axis; multiple layers of tubular heat storage material 2-4 are fitted on the outside of the core, and the tubular heat storage material 2-4 is provided with a curved gas channel 2-5; the curved gas channel 2-5 rotates from the lower annular surface of the tubular heat storage material 2-4 along the tube wall and leads to the upper annular surface.

[0028] The core of the heat storage body 2 3-1 is a cylindrical heat storage material 2 3-2, which has a straight gas channel 2 3-3 parallel to the central axis; the outer side of the core is fitted with multiple layers of tubular heat storage material 2 3-4, which is provided with a curved gas channel 2 3-5; the curved gas channel 2 3-5 rotates from the lower annular surface of the tubular heat storage material 2 3-4 along the tube wall and leads to the upper annular surface.

[0029] Figure 3 and Figure 4 In the diagram, only one curved gas channel is drawn, and the other curved gas channels follow the same direction.

[0030] Counting from the outside in, the curved gas channels of the odd-numbered layers (e.g., the first layer from the outside in) of the tubular heat storage material layer rotate counterclockwise upwards along the pipe wall (viewed from top to bottom) to the upper annular surface, while the curved gas channels of the even-numbered layers (e.g., the second layer from the outside in) rotate clockwise upwards along the pipe wall (viewed from top to bottom) to the upper annular surface. The curved gas channels extend the contact time between the gas and the heat storage material, improving heat exchange efficiency and thermal energy utilization. The gas turbulence in the odd-numbered and even-numbered layers cancels each other out, allowing VOC-containing waste gas to smoothly enter the combustion chamber for stable combustion, thus improving combustion efficiency.

[0031] The intake pipe 6-1 is connected to the intake port of the switching valve 4. The two outlets of the switching valve 4 are connected to pipe 1 7-1 and pipe 2 7-2 respectively. Pipe 1 7-1 is connected to the bottom of heat storage chamber 1 2, and pipe 2 7-2 is connected to the bottom of heat storage chamber 2 3. Valve 1 5-1 is installed on pipe 1 7-1, and valve 2 5-2 is installed on pipe 2 7-2.

[0032] The switching valve 4 has one inlet and two outlets. Gas entering the switching valve 4 can only flow out from one outlet. Operating the switching valve 4 can switch the gas to flow out from the other outlet.

[0033] One end of pipe 37-3 is connected to the bottom of heat storage chamber 12, and the other end is connected to exhaust pipe 6-2; valve 35-3 is installed on pipe 37-3.

[0034] One end of pipe 4 7-4 is connected to the bottom of heat storage chamber 2 3, and the other end is connected to exhaust pipe 6-2; valve 4 5-4 is installed on pipe 4 7-4.

[0035] The exhaust pipe 6-2 connects the fan and the chimney, and the exhaust gas after combustion is discharged through the exhaust pipe 6-2, the fan and the chimney.

[0036] In use, first close valve 1 (5-1) and valve 4 (5-4), then open valve 2 (5-2) and valve 3 (5-3). The VOCs-containing exhaust gas enters the heat storage chamber 2 (3) through the inlet pipe 6-1, the switching valve 4, and the pipe 2 (7-2), and then enters the combustion chamber 1 through the heat storage body 2 (3-1). The VOCs-containing exhaust gas is ignited by the igniter 1-1, and the VOCs gas undergoes combustion and decomposition to produce high-temperature CO2 and H2O. When the high-temperature exhaust gas passes through the heat storage body 1 (2-1), it transfers heat energy to the heat storage body 1 (2-1), and the temperature of the heat storage body 1 (2-1) rises. The exhaust gas, after its temperature decreases, is discharged through the pipe 3 (7-3) and the exhaust pipe 6-2. Then, close valves 2 (5-2) and 3 (5-3), and open valves 1 (5-1) and 4 (5-4). Operate the switching valve 4 to switch the outlet, allowing the VOC-containing waste gas to enter the heat storage chamber 2 along the inlet pipe 6-1, switching valve 4, and pipe 1 (7-1). As it passes through heat storage body 2-1, the VOC-containing waste gas absorbs heat and its temperature rises. It then enters the combustion chamber 1, where the preheated VOC-containing waste gas is ignited by igniter 1-1. The VOCs gas undergoes combustion and decomposition, producing high-temperature CO2 and H2O. The high-temperature exhaust gas transfers heat to heat storage body 2 (3-1) as it passes through it, raising its temperature. The cooled exhaust gas is then discharged along pipe 4 (7-4) and exhaust pipe 6-2. This process completes the first combustion purification cycle.

[0037] The VOC-containing waste gas then repeats the above cycle process. When passing through the heat storage body, the VOC-containing waste gas is preheated and its temperature is increased. When it is burned in the combustion chamber, it can save fuel consumption of igniter 1-1, thus achieving the purpose of energy saving.

[0038] Furthermore, a grid 2-6 is installed above the heat storage body 2-1, and a grid 2-7 is installed above the heat storage body 3-1; the grid 2-6 and the grid 2-7 have the same structure, material and size, and the height of the mesh holes is 2cm to 5cm.

Claims

1. A regenerative oxidizer characterized by: It comprises a combustion chamber (1), a first heat storage chamber (2), a second heat storage chamber (3), a conversion valve (4), a valve (5-1), a valve (5-2), a valve (5-3), a valve (5-4) and a pipeline; The top of the combustion chamber (1) is provided with an igniter (1-1), and the two sides of the combustion chamber (1) are connected with the first heat storage chamber (2) and the second heat storage chamber (3) respectively; The first heat storage chamber (2) is provided with a first heat storage body (2-1), and the second heat storage chamber (3) is provided with a second heat storage body (3-1); The first heat storage body (2-1) and the second heat storage body (3-1) are cylindrical bodies with the same structure, material and size; The axial core of the first heat storage body (2-1) is a cylindrical heat storage material (2-2), which has a straight gas passage (2-3) parallel to the central axis; the outer side of the axial core is sleeved with a plurality of layers of tubular heat storage material layers (2-4), which are provided with curved gas passages (2-5); the curved gas passages (2-5) pass from the lower ring surface of the tubular heat storage material layer (2-4) to the upper ring surface along the pipe wall; The axial core of the second heat storage body (3-1) is a cylindrical heat storage material (3-2), which has a straight gas passage (3-3) parallel to the central axis; the outer side of the axial core is sleeved with a plurality of layers of tubular heat storage material layers (3-4), which are provided with curved gas passages (3-5); the curved gas passages (3-5) pass from the lower ring surface of the tubular heat storage material layer (3-4) to the upper ring surface along the pipe wall; From outside to inside, the curved gas passages of the odd-numbered tubular heat storage material layers rotate counterclockwise along the pipe wall to the upper ring surface, and the curved gas passages of the even-numbered tubular heat storage material layers rotate clockwise along the pipe wall to the upper ring surface; The gas inlet pipe (6-1) is connected with the gas inlet of the conversion valve (4), the two gas outlets of the conversion valve (4) are connected with the pipeline one (7-1) and the pipeline two (7-2) respectively, the pipeline one (7-1) is connected with the bottom of the first heat storage chamber (2), the pipeline two (7-2) is connected with the bottom of the second heat storage chamber (3); the valve (5-1) is installed on the pipeline one (7-1), and the valve (5-2) is installed on the pipeline two (7-2); One end of the pipeline three (7-3) is connected with the bottom of the first heat storage chamber (2), and the other end is connected with the exhaust pipe (6-2); the valve (5-3) is installed on the pipeline three (7-3); One end of the pipeline four (7-4) is connected with the bottom of the second heat storage chamber (3), and the other end is connected with the exhaust pipe (6-2); the valve (5-4) is installed on the pipeline four (7-4).

2. A regenerative oxidizer as defined in claim 1, wherein: A grid one (2-6) is arranged above the first heat storage body (2-1), and a grid two (2-7) is arranged above the second heat storage body (3-1); the grid one (2-6) and the grid two (2-7) have the same structure, material and size.

3. A regenerative oxidizer as defined in claim 2, wherein: The height of the grid holes of the first grid (2-6) and the second grid (2-7) is 2cm to 5cm.

Images