A rotary regenerative thermal oxidation furnace for waste gas treatment

Abstract

The present invention discloses a rotary thermal storage oxidation furnace for waste gas treatment, comprising a furnace body, a gas distributor, a ceramic heat storage mechanism, an igniter, a fan and a controller, the gas distributor comprising an upper partition, a lower partition, a partition cylinder, a central axis, a distribution motor and an electric baffle, the upper partition and the lower partition are horizontally arranged one above the other, an upper air inlet and an upper exhaust port are arranged on the upper partition, a lower air inlet corresponding to the upper air inlet is arranged on the lower partition, the upper and lower ends of the partition cylinder are respectively connected to the upper air inlet and the lower air inlet, the central axis is coaxially connected to the upper partition and the lower partition respectively and is driven to rotate by the distribution motor located below the lower partition, the electric baffle is installed on the top surface of the upper partition and can close the upper air inlet or the upper exhaust port, an exhaust pipe located between the upper partition and the lower partition and an air inlet pipe located below the lower partition are respectively provided on the outer wall of the furnace body, which can effectively improve the treatment quality of VOCs waste gas.

Description

[Technical field]

[0001] The invention relates to the technical field of waste gas treatment, in particular to the technical field of a rotary thermal storage oxidation furnace for waste gas treatment. [Background technology]

[0002] Optical films will inevitably produce VOCs waste gas during the production process. The traditional disposal method is to collect VOCs waste gas as a whole, then converge it to the activated carbon disposal box for adsorption, and then desorb, catalyze and burn it. The equipment structure is large and needs to be assembled and installed on site. The connection accuracy and air tightness cannot be guaranteed, which may cause leakage and reduce the disposal efficiency. With the advancement of technology, people have developed a rotary thermal storage oxidation furnace, which can directly oxidize the organic matter in the VOCs waste gas delivered by combustion at high temperature, while storing the waste heat generated by combustion. It can also be used with a hot oil exchanger to heat the thermal oil with the stored waste heat and re-deliver it to the workshop for use by air-conditioning units and other devices, further solving the problems of energy waste and emissions.

[0003] Although the existing rotary regenerative thermal oxidizer has valves installed at the inlet and outlet pipes, during operation, some VOCs waste gas that is not fully burned may gather in the gas distributor and then flow directly out along the outlet pipe after the valve is opened, affecting the overall treatment effect. In addition, in order to ensure good heat storage of the rotary regenerative thermal oxidizer, people usually need to increase the height of its internal ceramic heat storage mechanism, which leads to an increase in the floor space of the furnace. [Summary of the invention]

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a rotary regenerative oxidation furnace for waste gas treatment, which can effectively improve the treatment quality of VOCs waste gas.

[0005] To achieve the above-mentioned purpose, the present invention proposes a rotary thermal storage oxidation furnace for waste gas treatment, including a furnace body, a gas distributor, a ceramic heat storage mechanism, an igniter, a fan and a controller, the gas distributor including an upper partition, a lower partition, a partition cylinder, a central axis, a distribution motor and an electric baffle, the upper partition and the lower partition are horizontally arranged one above the other, an upper air inlet and an upper exhaust port are arranged on the upper partition, a lower air inlet corresponding to the upper air inlet is arranged on the lower partition, the upper and lower ends of the partition cylinder are respectively connected to the upper air inlet and the lower air inlet to form an air duct separated from the chamber between the upper partition and the lower partition, the central axis is respectively connected to the upper partition and the lower partition The partitions are coaxially connected and driven to rotate by a distribution motor located below the lower partition. The electric baffle is installed on the top surface of the upper partition and can close the upper air inlet or the upper exhaust port. The outer wall of the furnace body is provided with an exhaust pipe between the upper partition and the lower partition and an air inlet pipe below the lower partition. The ceramic heat storage mechanism is installed in the inner cavity of the furnace body and is located above the upper partition. A combustion chamber is provided between the ceramic heat storage mechanism and the top of the inner cavity of the furnace body. The igniter is installed on the furnace body and the ignition head extends into the combustion chamber. The fan is installed at the exhaust pipe and the air inlet pipe. The controller is electrically connected to the gas distributor, the igniter and the fan respectively.

[0006] Preferably, the electric door stopper includes a door stopper motor, a door plate and a transmission assembly, and the door stopper motor drives the door plate to rotate along the central axis of the upper partition on the top surface of the upper partition through the transmission assembly to close the upper air inlet or the upper exhaust port.

[0007] Preferably, the transmission assembly includes a driving gear, a passive gear and a guide shaft, the guide shaft is rotatably coaxially connected to the top surface of the upper partition, the driving gear is installed outside the output shaft of the door-blocking motor, and the passive gear is installed outside the guide shaft and meshes with the driving gear.

[0008] Preferably, an elastic gasket is provided on the bottom surface of the door panel, and the bottom surface of the elastic gasket is covered with a smooth film.

[0009] Preferably, the ceramic heat storage mechanism includes a support rod, a ceramic plate and an air guide plate. The support rod is vertically arranged in the inner cavity of the furnace body through a bracket. Several ceramic plates are respectively arranged vertically and fixed around the outer wall of the support rod. Several air guide plates are horizontally arranged from top to bottom between two adjacent ceramic plates. Each air guide plate is provided with an air guide hole, and the air guide holes of the upper and lower adjacent air guide plates are not arranged opposite to each other.

[0010] Preferably, the air guide holes are arranged near the sharp corners or the arc-shaped outer edges of the air guide plates.

[0011] Preferably, the furnace body is provided with a notch near the ceramic heat storage mechanism, a sealing door is detachably installed at the notch, and the ceramic plate is detachably connected to the air guide sheet.

[0012] Preferably, a plurality of insertion rails are provided on the outer wall of the ceramic plate from top to bottom, and the air guide plate is plugged into the ceramic plate along the insertion rails.

[0013] Beneficial effects of the present invention:

[0014] The present invention comprises an upper baffle, a lower baffle, a baffle cylinder, a central axis and a distribution motor to form a main body of the gas distributor, and an electric baffle is added to the top surface of the upper baffle. The electric baffle can be used to block the upper exhaust port before combustion to prevent part of the VOCs waste gas from entering the gas distributor in advance and then flowing out along the exhaust pipe without being fully burned. The electric baffle can also be used to block the upper air inlet after combustion to prevent the gas from returning to the airway, thereby preventing the inlet and outlet between the distributor and the ceramic furnace from being completely open throughout the entire process, thereby effectively improving the treatment quality of the VOCs waste gas. The baffle motor, the door panel and the transmission assembly are provided to form the electric baffle. , the upper air inlet or the upper air outlet can be closed without affecting the rotation of the main body of the gas distributor. At the same time, since the door panel rotates closely against the upper partition at all times, the turbulence to the gas in the furnace is small; a ceramic heat storage mechanism is formed by arranging a support rod, a ceramic plate and an air guide sheet, so that a plurality of vertically arranged ceramic plates are respectively fixed around the outer wall of the support rod, and a plurality of air guide sheets are horizontally arranged between two adjacent ceramic plates from top to bottom, and at the same time, the air guide holes of the upper and lower adjacent air guide sheets are not arranged opposite to each other up and down, which effectively prolongs the time and distance for the high-temperature gas to pass through the ceramic heat storage mechanism, so that the heat can be fully transferred.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0016] Figure 1 This is a front view of a rotary regenerative thermal oxidation furnace for waste gas treatment according to the present invention;

[0017] Figure 2 It is a schematic diagram of the assembly of a furnace body, a gas distributor, a ceramic heat storage mechanism and an igniter of a rotary thermal storage oxidation furnace for waste gas treatment of the present invention;

[0018] Figure 3 It is a front view of a gas distributor of a rotary regenerative thermal oxidation furnace for waste gas treatment according to the present invention;

[0019] Figure 4 It is a top view of a gas distributor of a rotary regenerative thermal oxidation furnace for waste gas treatment according to the present invention;

[0020] Figure 5It is a top view of an upper baffle of a rotary regenerative thermal oxidation furnace for waste gas treatment according to the present invention;

[0021] Figure 6 It is a top view of a lower baffle of a rotary regenerative thermal oxidation furnace for waste gas treatment according to the present invention;

[0022] Figure 7 It is a front view of a ceramic heat storage mechanism of a rotary thermal storage oxidation furnace for waste gas treatment according to the present invention;

[0023] Figure 8 It is a top view of a ceramic heat storage mechanism of a rotary thermal storage oxidation furnace for waste gas treatment according to the present invention;

[0024] Fig. 9 It is a front view of a ceramic heat storage mechanism of a rotary regenerative thermal oxidation furnace for waste gas treatment of the present invention when the air guide is removed;

[0025] Fig.10 It is a top view of a ceramic heat storage mechanism of a rotary thermal storage oxidation furnace for waste gas treatment according to the present invention when the air guide is removed.

[0026] In the figure: 1-furnace body, 11-exhaust pipe, 12-intake pipe, 13-sealing door, 2-gas distributor, 21-upper partition, 211-upper air inlet, 212-upper exhaust port, 22-lower partition, 221-lower air inlet, 23-partition cylinder, 24-middle axis, 25-distribution motor, 26-electric door stop, 261-door stop motor, 262-door plate, 263-driving gear, 264-passive gear, 265-guide shaft, 3-ceramic heat storage mechanism, 31-support rod, 32-ceramic plate, 321-insertion rail, 33-air guide plate, 331-air guide hole, 4-igniter, 5-blower. [Specific implementation method]

[0027] See also Figures 1 to 10The present invention discloses a rotary regenerative thermal oxidation furnace for waste gas treatment, comprising a furnace body 1, a gas distributor 2, a ceramic heat storage mechanism 3, an igniter 4, a fan 5 and a controller, wherein the gas distributor 2 comprises an upper partition 21, a lower partition 22, a partition cylinder 23, a central axis 24, a distribution motor 25 and an electric baffle 26, wherein the upper partition 21 and the lower partition 22 are horizontally arranged one above the other, an upper air inlet 211 and an upper exhaust port 212 are arranged on the upper partition 21, a lower air inlet 221 corresponding to the upper air inlet 211 is arranged on the lower partition 22, the upper and lower ends of the partition cylinder 23 are respectively connected to the upper air inlet 211 and the lower air inlet 221 to form an air passage separated from the chamber between the upper partition 21 and the lower partition 22, and the central axis 24 is respectively connected to the upper partition 21 and the lower exhaust port 212. The lower partition 22 is coaxially connected and driven to rotate by a distribution motor 25 located below the lower partition 22. The electric baffle 26 is installed on the top surface of the upper partition 21 and can close the upper air inlet 211 or the upper exhaust port 212. The outer wall of the furnace body 1 is respectively provided with an exhaust pipe 11 located between the upper partition 21 and the lower partition 22 and an air intake pipe 12 located below the lower partition 22. The ceramic heat storage mechanism 3 is installed in the inner cavity of the furnace body 1 and is located above the upper partition 21. A combustion chamber is provided between the ceramic heat storage mechanism 3 and the top of the inner cavity of the furnace body 1. The igniter 4 is installed on the furnace body 1 and the ignition head extends into the combustion chamber. The fan 5 is installed at the exhaust pipe 11 and the air intake pipe 12. The controller is electrically connected to the gas distributor 2, the igniter 4 and the fan 5, respectively.

[0028] The electric door stopper 26 includes a door stopper motor 261 , a door plate 262 and a transmission assembly. The door stopper motor 261 drives the door plate 262 to rotate along the central axis of the upper partition 21 on the top surface of the upper partition 21 through the transmission assembly to close the upper air inlet 211 or the upper exhaust port 212 .

[0029] The transmission assembly includes a driving gear 263, a driven gear 264 and a guide shaft 265. The guide shaft 265 is rotatably coaxially connected to the top surface of the upper partition 21. The driving gear 263 is installed outside the output shaft of the door-blocking motor 261. The driven gear 264 is installed outside the guide shaft 265 and meshes with the driving gear 263.

[0030] An elastic gasket is disposed on the bottom surface of the door panel 262 , and a smooth film is coated on the bottom surface of the elastic gasket.

[0031] The ceramic heat storage mechanism 3 includes a support rod 31, a ceramic plate 32 and an air guide plate 33. The support rod 31 is vertically arranged in the inner cavity of the furnace body 1 through a bracket. Several ceramic plates 32 are respectively arranged vertically and fixed around the outer wall of the support rod 31. Several air guide plates 33 are horizontally arranged from top to bottom between two adjacent ceramic plates 32. Each air guide plate 33 is respectively provided with an air guide hole 331, and the air guide holes 331 of the upper and lower adjacent air guide plates 33 are not arranged opposite to each other.

[0032] The air guide holes 331 are disposed near the sharp corners or the arc-shaped outer edges of the air guide plates 33 .

[0033] The furnace body 1 is provided with a notch near the ceramic heat storage mechanism 3 , a sealing door 13 is detachably installed at the notch, and the ceramic plate 32 and the air guide plate 33 are detachably connected.

[0034] A plurality of insertion rails 321 are respectively provided on the outer wall of the ceramic plate 32 from top to bottom, and the air guide plate 33 is inserted into the ceramic plate 32 along the insertion rails 321 .

[0035] Working process of the present invention:

[0036] In the course of work,

[0037] The VOCs waste gas collected from the negative pressure dust-free workshop and the micro-negative pressure closed oven in the factory is connected to the fan 5 through a pipeline, and then the fan 5 is used to pump the VOCs waste gas along the air inlet pipe 12 into the inner cavity of the furnace body 1. At this time, the door plate 262 closes the upper exhaust port 212, and the VOCs waste gas can flow upward along the airway in the partition 23, and then after passing through the ceramic heat storage mechanism 3 and being preheated, it enters the combustion chamber and is ignited by the igniter 4, thereby decomposing the organic matter into harmless CO2 and H2O. Subsequently, the door-blocking motor 261 drives the driving gear 263 to rotate, and uses the passive gear 264 and the guide shaft 265 to drive the door plate 262 to rotate until the door plate 262 closes the upper air inlet 211. The high-temperature gas generated by the combustion transfers heat to each ceramic plate 32 and temporarily stores it while flowing downward through the ceramic heat storage mechanism 3, and then enters the chamber between the upper partition 21 and the lower partition 22 along the upper exhaust port 212, and leaves along the exhaust pipe 11. After completing one combustion, the distribution motor 25 drives the central shaft 24 to rotate a certain angle, so that the upper air inlet 211 and the lower air inlet 221 are aligned with another set of ceramic plates 32.

[0038] In addition, when the high-temperature gas flows through the ceramic heat storage mechanism 3, since the air guide holes 331 of each air guide plate 33 between the same group of ceramic plates 32 are staggered, the high-temperature gas needs to flow horizontally for a certain distance before passing through each air guide plate 33, thereby extending the time it takes to pass through the ceramic heat storage mechanism 3.

[0039] After being used for a period of time, the sealing plate 13 can be opened and each air guide sheet 33 can be pulled out to clear the blocked air guide holes 331 .

[0040] The present invention comprises an upper baffle, a lower baffle, a baffle cylinder, a central axis and a distribution motor to form a main body of the gas distributor, and an electric baffle is added to the top surface of the upper baffle. The electric baffle can be used to block the upper exhaust port before combustion to prevent part of the VOCs waste gas from entering the gas distributor in advance and then flowing out along the exhaust pipe without being fully burned. The electric baffle can also be used to block the upper air inlet after combustion to prevent the gas from returning to the airway, thereby preventing the inlet and outlet between the distributor and the ceramic furnace from being completely open throughout the entire process, thereby effectively improving the treatment quality of the VOCs waste gas. The baffle motor, the door panel and the transmission assembly are provided to form the electric baffle. , the upper air inlet or the upper air outlet can be closed without affecting the rotation of the main body of the gas distributor. At the same time, since the door panel rotates closely against the upper partition at all times, the turbulence to the gas in the furnace is small; a ceramic heat storage mechanism is formed by arranging a support rod, a ceramic plate and an air guide sheet, so that a plurality of vertically arranged ceramic plates are respectively fixed around the outer wall of the support rod, and a plurality of air guide sheets are horizontally arranged between two adjacent ceramic plates from top to bottom, and at the same time, the air guide holes of the upper and lower adjacent air guide sheets are not arranged opposite to each other up and down, which effectively prolongs the time and distance for the high-temperature gas to pass through the ceramic heat storage mechanism, so that the heat can be fully transferred.

[0041] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A rotary regenerative thermal oxidation furnace for waste gas treatment, characterized in that: The invention comprises a furnace body (1), a gas distributor (2), a ceramic heat storage mechanism (3), an igniter (4), a fan (5) and a controller, wherein the gas distributor (2) comprises an upper partition (21), a lower partition (22), a partition cylinder (23), a central axis (24), a distribution motor (25) and an electric baffle (26), wherein the upper partition (21) and the lower partition (22) are arranged horizontally one above the other, and an upper air inlet (26) is provided on the upper partition (21). The lower baffle (22) is provided with a lower air inlet (221) corresponding to the upper air inlet (211), the upper and lower ends of the baffle (23) are respectively connected to the upper air inlet (211) and the lower air inlet (221) to form an air passage separated from the chamber between the upper baffle (21) and the lower baffle (22), and the central axis (24) is coaxial with the upper baffle (21) and the lower baffle (22). The electric baffle (26) is connected to and driven to rotate by a distribution motor (25) located below the lower baffle (22); the electric baffle (26) is installed on the top surface of the upper baffle (21) and can close the upper air inlet (211) or the upper air outlet (212); the outer wall of the furnace body (1) is respectively provided with an exhaust pipe (11) located between the upper baffle (21) and the lower baffle (22) and an air inlet pipe (12) located below the lower baffle (22); the ceramic heat storage mechanism (3) is installed in the inner cavity of the furnace body (1) and is located above the upper baffle (21); a combustion chamber is provided between the ceramic heat storage mechanism (3) and the top of the inner cavity of the furnace body (1); the igniter (4) is installed on the furnace body (1) and the ignition head extends into the combustion chamber; the fan (5) is installed at the exhaust pipe (11) and the air inlet pipe (12); and the controller is electrically connected to the gas distributor (2), the igniter (4) and the fan (5), respectively.

2. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 1, characterized in that: The electric door stopper (26) comprises a door stopper motor (261), a door plate (262) and a transmission assembly. The door stopper motor (261) drives the door plate (262) through the transmission assembly to rotate along the central axis of the upper partition (21) on the top surface of the upper partition (21) to close the upper air inlet (211) or the upper air outlet (212).

3. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 2, characterized in that: The transmission assembly comprises a driving gear (263), a driven gear (264) and a guide shaft (265); the guide shaft (265) is rotatably coaxially connected to the top surface of the upper partition (21); the driving gear (263) is installed outside the output shaft of the door-blocking motor (261); and the driven gear (264) is installed outside the guide shaft (265) and meshes with the driving gear (263).

4. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 2, characterized in that: The bottom surface of the door panel (262) is provided with an elastic gasket, and the bottom surface of the elastic gasket is covered with a smooth film.

5. A rotary regenerative thermal oxidation furnace for waste gas treatment according to any one of claims 1 to 4, characterized in that: The ceramic heat storage mechanism (3) comprises a support rod (31), a ceramic plate (32) and an air guide plate (33); the support rod (31) is vertically arranged in the inner cavity of the furnace body (1) through a bracket; a plurality of ceramic plates (32) are respectively vertically arranged and fixed around the outer wall of the support rod (31); a plurality of air guide plates (33) are horizontally arranged from top to bottom between two adjacent ceramic plates (32); an air guide hole (331) is respectively arranged on each of the air guide plates (33); and the air guide holes (331) of the two adjacent air guide plates (33) are not arranged opposite to each other vertically.

6. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 5, characterized in that: The air guide hole (331) is arranged close to the sharp corner or the arc-shaped outer edge of the air guide plate (33).

7. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 5, characterized in that: The furnace body (1) is provided with a notch near the ceramic heat storage mechanism (3), a sealing door (13) is detachably mounted at the notch, and the ceramic plate (32) and the air guide plate (33) are detachably connected.

8. A rotary regenerative thermal oxidation furnace for waste gas treatment as claimed in claim 7, characterized in that: A plurality of insertion rails (321) are respectively arranged on the outer wall of the ceramic plate (32) from top to bottom, and the air guide plate (33) is inserted into the ceramic plate (32) along the insertion rails (321).

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