Energy-saving blowback device of RTO (Regenerative Thermal Oxidation) furnace

Abstract

The utility model belongs to the technical field of RTO furnaces, and discloses an RTO furnace energy-saving blowback device which comprises a bottom plate, a furnace body is fixedly arranged on the upper surface of the bottom plate, a blowing pipeline is fixedly arranged on one side of the furnace body, an air mixing box is fixedly arranged at one end of the blowing pipeline, an RTO fan is fixedly arranged on one side of the air mixing box, and a blowing fan is fixedly arranged on the other side of the blowing pipeline. The lower surface of the RTO fan is fixedly connected with the bottom plate, a high-temperature bypass is fixedly arranged on one side of the furnace body, a high-temperature air mixing box is fixedly arranged on one side of the furnace body, and the high-temperature air mixing box is fixedly connected with the lower end of the high-temperature bypass. The blowback operation can be carried out on equipment, the use of an RTO system fan is reduced, reasonable distribution, regulation and control of gas entering the furnace body can be realized through the combustion chamber and the air distribution chamber located below the combustion chamber, sufficient combustion of the gas in the combustion chamber is ensured, and the combustion efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of RTO furnace technology, specifically an energy-saving backflushing device for RTO furnaces. Background Technology

[0002] RTO furnace energy-saving backflushing devices are widely applicable to industrial scenarios involving organic waste gas emissions, such as chemical, coating, printing, electronic component manufacturing, semiconductor production, automotive parts spraying, pharmaceutical packaging, and furniture manufacturing. They are especially suitable for scenarios that require efficient purification of pollutants such as VOCs, benzene series compounds, and ketones and are sensitive to operating costs. Examples include continuous painting lines that need to stably treat high-concentration paint mist waste gas for a long time, or solvent recovery in the coating and lamination processes of photovoltaic cell production.

[0003] However, the following problems were found in the implementation of the relevant technologies:

[0004] In existing RTO furnace technology, most RTO furnaces still require additional backflushing blowers for backflushing operations. This not only increases equipment costs and system complexity, but also means more energy consumption and potential operational failure points with each additional blower, leading to higher maintenance costs. At the same time, since most devices lack an effective structure for the reasonable distribution and control of gas entering the furnace, the gas often cannot burn completely in the combustion chamber, resulting in low combustion efficiency. In addition, the overall gas flow and treatment effect are poor, resulting in high energy consumption of the entire RTO furnace system, and the backflushing efficiency cannot meet increasingly stringent environmental protection and production requirements. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides an energy-saving backflushing device for an RTO furnace, which offers advantages such as reduced fan usage and high combustion efficiency. This invention utilizes the air pressure of the RTO furnace and a purging pipeline located in the air distribution chamber below the combustion chamber to perform backflushing operations on the equipment, thereby reducing the need for a single RTO system fan. Furthermore, through the combustion chamber and the air distribution chamber below it, the gas entering the furnace can be rationally distributed and controlled, ensuring complete combustion within the combustion chamber and improving combustion efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving backflushing device for an RTO furnace, comprising a base plate, a furnace body fixedly mounted on the upper surface of the base plate, a purge pipe fixedly mounted on one side of the furnace body, a mixing box fixedly mounted at one end of the purge pipe, an RTO blower fixedly mounted on one side of the mixing box, the lower surface of the RTO blower fixedly connected to the base plate, a high-temperature bypass fixedly mounted on one side of the furnace body, a high-temperature mixing box fixedly mounted on one side of the furnace body, the high-temperature mixing box fixedly connected to the lower end of the high-temperature bypass, and a chimney fixedly mounted on one side of the high-temperature mixing box, the lower end of the chimney fixedly connected to the base plate.

[0007] Preferably, a burner is fixedly installed on one side of the furnace body, a combustion chamber is opened on the inner side of the furnace body, an air distribution chamber is opened below the combustion chamber, and a lifting valve is fixedly installed on the inner side of the air distribution chamber.

[0008] Preferably, the upper surface of the mixing box is provided with an exhaust gas inlet.

[0009] Preferably, the furnace body is made of heat-resistant alloy steel.

[0010] Preferably, the purging pipeline, high-temperature bypass, and high-temperature mixing box are all made of stainless steel.

[0011] Preferably, one end of the purging pipe is fixedly connected to one side of the inner wall of the air distribution chamber.

[0012] Preferably, a heat storage ceramic is fixedly provided on the inner side of the combustion chamber, and the heat storage ceramic is located above the air distribution chamber.

[0013] Preferably, a combustion-supporting fan is fixedly provided on one side of the burner, and the lower surface of the combustion-supporting fan is fixedly connected to the base plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model utilizes the air pressure of the RTO and the purging pipeline set in the air distribution chamber below the combustion chamber to perform backflushing operation on the equipment, thereby eliminating the need for a backflushing blower and reducing the use of one RTO system blower.

[0016] 2. This utility model, through the combustion chamber and the air distribution chamber located below it, can achieve reasonable distribution and control of the gas entering the furnace, ensuring that the gas is fully combusted in the combustion chamber and improving combustion efficiency. At the same time, in conjunction with the subsequent layout connected to the high-temperature mixing box, it helps to optimize the gas flow and treatment effect of the entire RTO furnace energy-saving backflushing device, thereby achieving the purpose of energy saving and improving backflushing treatment efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0019] Figure 3 This is a schematic cross-sectional view of the furnace body structure of this utility model;

[0020] Figure 4 This is a top view of the structure of this utility model.

[0021] In the diagram: 1. Base plate; 20. Furnace body; 21. Purge pipeline; 22. Exhaust gas inlet; 23. Burner; 24. High-temperature bypass; 25. Chimney; 26. High-temperature mixing box; 27. Air distribution chamber; 28. Regenerative ceramic; 29. ​​Combustion chamber; 201. Lifting valve; 30. RTO fan; 31. Mixing box; 32. Combustion fan. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, this utility model provides an energy-saving backflushing device for an RTO furnace, including a base plate 1, a furnace body 20 fixedly mounted on the upper surface of the base plate 1, a purge pipe 21 fixedly mounted on one side of the furnace body 20, a mixing box 31 fixedly mounted at one end of the purge pipe 21, an RTO blower 30 fixedly mounted on one side of the mixing box 31, the lower surface of the RTO blower 30 fixedly connected to the base plate 1, a high-temperature bypass 24 fixedly mounted on one side of the furnace body 20, a high-temperature mixing box 26 fixedly mounted on one side of the furnace body 20, the high-temperature mixing box 26 fixedly connected to the lower end of the high-temperature bypass 24, a chimney 25 fixedly mounted on one side of the high-temperature mixing box 26, and the lower end of the chimney 25 fixedly connected to the base plate 1. During the use of the energy-saving backflushing device for the RTO furnace, the exhaust gas enters the mixing box 31 from the exhaust gas inlet 22 on the upper surface of the mixing box 31, and after preliminary mixing in the mixing box 31, it is transported to the air distribution chamber 27 on one side of the furnace body 20 via the purge pipe 21. At this time, under the continuous action of the RTO blower 30, the gas is rationally distributed through the air distribution chamber 27 and enters the combustion chamber 29 inside the furnace body 20. When the furnace body 20 is operating normally, if backflushing is required, the air pressure generated by the RTO blower 30 causes the gas to flow in the opposite direction through the purging pipe 21 to purge the air distribution chamber 27 and the surface of the heat storage ceramic 28, removing deposits. When the furnace temperature is too high or the gas flow path needs to be adjusted, some gas can enter the high-temperature mixing box 26 through the high-temperature bypass 24, mix with the gas from the combustion chamber 29 or other parts, and finally be discharged through the chimney 25 connected to the high-temperature mixing box 26, completing the exhaust gas treatment and backflushing operation process.

[0024] Specifically, a burner 23 is fixedly installed on one side of the furnace body 20, and a combustion chamber 29 is opened inside the furnace body 20. Below the combustion chamber 29, an air distribution chamber 27 is opened, and a lifting valve 201 is fixedly installed inside the air distribution chamber 27. When using this RTO furnace energy-saving backflushing device, the exhaust gas enters the mixing box 31 through the exhaust gas inlet 22 and then enters the air distribution chamber 27 through the purge pipe 21. At this time, the lifting valve 201 inside the air distribution chamber 27 functions, precisely controlling the gas flow rate and pressure entering the combustion chamber 29 according to the needs of different stages in the furnace, ensuring uniform gas distribution. Simultaneously, the burner 23 located on one side of the furnace body 20, with the assistance of the combustion fan 32, continuously provides a stable flame, ensuring that the gas entering the combustion chamber 29 is in full contact with the flame. Because a heat storage ceramic 28 is fixedly installed inside the combustion chamber 29 above the air distribution chamber 27, the gas exchanges heat fully with the heat storage ceramic 28 during its ascent. After absorbing heat, its temperature rises, and under the action of the burner 23, it burns rapidly and completely, converting harmful substances in the exhaust gas into harmless substances. During operation, the gas entering the furnace body 20 is rationally distributed and controlled by adjusting the opening of the lifting valve 201 and the combustion intensity of the burner 23 according to the actual working conditions, ensuring efficient and stable combustion.

[0025] Furthermore, an exhaust gas inlet 22 is provided on the upper surface of the mixing box 31. The exhaust gas inlet 22 serves as the inlet for the exhaust gas to enter the device. It is located on the upper surface of the mixing box 31, which allows the exhaust gas to enter the mixing box 31 directly from above, facilitating the collection and transportation of the exhaust gas. This reduces pipe bends and resistance during the exhaust gas transportation process, lowers energy loss, and also simplifies the overall structural layout of the device. It also facilitates the subsequent preliminary mixing treatment of the exhaust gas, improving the efficiency and quality of exhaust gas treatment.

[0026] Furthermore, the furnace body 20 is made of heat-resistant alloy steel. During the operation of the RTO furnace, the furnace body 20 needs to withstand the high-temperature environment and the high temperatures and corrosive substances generated by the combustion of internal exhaust gases. Heat-resistant alloy steel has excellent high-temperature strength, oxidation resistance, and corrosion resistance, effectively resisting high temperatures and corrosion. This ensures that the furnace body 20 will not deform, be damaged, or experience performance degradation under long-term high-temperature operation, extending the service life of the furnace body 20, reducing the frequency of equipment maintenance and replacement, lowering operating costs, and ensuring the stability and safety of the equipment operation.

[0027] It is worth noting that the purge pipe 21, high temperature bypass 24 and high temperature mixing box 26 are all made of stainless steel. Stainless steel has good corrosion resistance. During the operation of the RTO furnace, these components will come into contact with exhaust gas containing various chemicals and high temperature environment. Using stainless steel can effectively prevent the components from being corroded and ensure the integrity and stability of its structure.

[0028] It is worth noting that one end of the purging pipe 21 is fixedly connected to the inner wall of one side of the air distribution chamber 27. During the energy-saving backflushing process of the RTO furnace, the purging pipe 21 needs to deliver gas to the air distribution chamber 27 to purge the air distribution chamber 27 and the surface of the heat storage ceramic 28.

[0029] It is worth mentioning that a regenerative ceramic 28 is fixedly installed inside the combustion chamber 29, above the air distribution chamber 27. During the operation of the RTO furnace, before the exhaust gas enters the combustion chamber 29, it undergoes preliminary distribution through the air distribution chamber 27, and then rises to the area of ​​the regenerative ceramic 28. The regenerative ceramic 28 has excellent heat storage performance and can absorb and store the high-temperature heat generated by combustion.

[0030] It is worth emphasizing that a combustion-supporting fan 32 is fixedly installed on one side of the burner 23, and the lower surface of the combustion-supporting fan 32 is fixedly connected to the base plate 1. During the combustion process in the RTO furnace, the burner 23 requires sufficient air to support the complete combustion of the exhaust gas. The combustion-supporting fan 32 is fixedly installed on one side of the burner 23, which can stably provide the burner 23 with an appropriate amount of air, ensuring stable flame and complete combustion, improving combustion efficiency, and enabling more thorough oxidation and decomposition of harmful substances in the exhaust gas.

[0031] The burner 23, lift valve 201, RTO fan 30, and combustion-supporting fan 32 are existing technologies and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail. The "front, rear, left, and right" views of this device are... Figure 1 The direction shown in the diagram is the reference.

[0032] Working Principle: During the use of the RTO furnace energy-saving backflushing device, exhaust gas enters the mixing chamber 31 from the exhaust gas inlet 22 on the upper surface of the mixing chamber 31. After preliminary mixing in the mixing chamber 31, it is transported to the air distribution chamber 27 on one side of the furnace body 20 via the purge pipe 21. At this time, under the continuous action of the RTO blower 30, the gas is reasonably distributed through the air distribution chamber 27 and enters the combustion chamber 29 inside the furnace body 20. When the furnace body 20 is operating normally, if backflushing is required, the air pressure generated by the RTO blower 30 causes the gas to flow in the reverse direction through the purge pipe 21 to purge the air distribution chamber 27 and the surface of the heat storage ceramic 28, removing deposits. When the furnace temperature is too high or the gas flow path needs to be adjusted, some gas can enter the high-temperature mixing chamber 26 through the high-temperature bypass 24, mix with the gas from the combustion chamber 29 or other parts, and finally be discharged through the chimney 25 connected to the high-temperature mixing chamber 26, completing the exhaust gas treatment and backflushing operation process.

[0033] When using the energy-saving backflushing device for this RTO furnace, the exhaust gas enters the mixing box 31 through the exhaust gas inlet 22 and then enters the air distribution chamber 27 through the purge pipe 21. At this time, the lifting valve 201 inside the air distribution chamber 27 plays a role, precisely controlling the gas flow and pressure entering the combustion chamber 29 according to the needs of different stages in the furnace, so as to make the gas evenly distributed. At the same time, the burner 23 located on one side of the furnace body 20, with the assistance of the combustion fan 32, continuously provides a stable flame, ensuring that the gas entering the combustion chamber 29 is in full contact with the flame. Since the heat storage ceramic 28 is fixedly installed inside the combustion chamber 29 above the air distribution chamber 27, the gas exchanges heat fully with the heat storage ceramic 28 during the rising process, and the temperature rises after absorbing heat. Under the action of the burner 23, it burns rapidly and completely, converting the harmful substances in the exhaust gas into harmless substances. During operation, according to the actual working conditions, the opening of the lifting valve 201 and the combustion intensity of the burner 23 are adjusted to achieve reasonable distribution and control of the gas entering the furnace body 20, ensuring that the combustion process is efficient and stable.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving backflushing device for an RTO furnace, comprising a base plate (1), characterized in that: A furnace body (20) is fixedly provided on the upper surface of the base plate (1). A purge pipe (21) is fixedly provided on one side of the furnace body (20). A mixing box (31) is fixedly provided at one end of the purge pipe (21). An RTO fan (30) is fixedly provided on one side of the mixing box (31). The lower surface of the RTO fan (30) is fixedly connected to the base plate (1). A high-temperature bypass (24) is fixedly provided on one side of the furnace body (20). A high-temperature mixing box (26) is fixedly provided on one side of the furnace body (20). The high-temperature mixing box (26) is fixedly connected to the lower end of the high-temperature bypass (24). A chimney (25) is fixedly provided on one side of the high-temperature mixing box (26). The lower end of the chimney (25) is fixedly connected to the base plate (1).

2. The energy-saving backflushing device for an RTO furnace according to claim 1, characterized in that: A burner (23) is fixedly provided on one side of the furnace body (20), a combustion chamber (29) is provided on the inner side of the furnace body (20), an air distribution chamber (27) is provided below the combustion chamber (29), and a lifting valve (201) is fixedly provided on the inner side of the air distribution chamber (27).

3. The energy-saving backflushing device for an RTO furnace according to claim 1, characterized in that: The upper surface of the mixing box (31) is provided with an exhaust gas inlet (22).

4. The energy-saving backflushing device for an RTO furnace according to claim 1, characterized in that: The furnace body (20) is made of heat-resistant alloy steel.

5. The energy-saving backflushing device for an RTO furnace according to claim 1, characterized in that: The purging pipeline (21), high-temperature bypass (24) and high-temperature mixing box (26) are all made of stainless steel.

6. The energy-saving backflushing device for an RTO furnace according to claim 1, characterized in that: One end of the purging pipe (21) is fixedly connected to the inner wall of one side of the air distribution chamber (27).

7. The energy-saving backflushing device for an RTO furnace according to claim 2, characterized in that: The combustion chamber (29) is fixedly provided with a heat storage ceramic (28) on the inner side, and the heat storage ceramic (28) is located above the air distribution chamber (27).

8. The energy-saving backflushing device for an RTO furnace according to claim 2, characterized in that: A combustion-supporting fan (32) is fixedly provided on one side of the burner (23), and the lower surface of the combustion-supporting fan (32) is fixedly connected to the base plate (1).

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