A cleaning method and device for an RTO regenerative thermal oxidizer

Abstract

The present invention relates to the technical field of oxidation furnace cleaning, in particular to a cleaning method and device for an RTO regenerative thermal oxidation furnace, including a combustion chamber, a regenerative chamber, an intake pipe for conveying organic waste gas, an outlet pipe for outputting purified tail gas, and a fresh air supplement pipe. A cleaning component is provided inside the intake pipe. A circulation pipe is connected to the intake pipe. One end of the circulation pipe communicates with the middle section of the intake pipe, and the other end of the circulation pipe communicates with the intake end of the intake pipe. The cleaning component includes a blade component and a driving mechanism for driving the blade component to work. A filter screen is detachably installed in the middle section of the circulation pipe, and an air extraction pump is also provided on the circulation pipe. The present invention can effectively clean the impurity accumulation on the inner wall of the furnace and the pipeline, and assist in cleaning the oxidation furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of oxidation furnace cleaning, and in particular to a cleaning method and device for a regenerative thermal oxidizer (RTO). Background Art

[0002] A regenerative thermal oxidizer (RTO) is an efficient and environmentally friendly organic waste gas treatment device. Its principle is to oxidize organic waste gas into harmless water and carbon dioxide at high temperature to achieve the purpose of purifying waste gas. Compared with catalytic combustion, traditional direct combustion, adsorption, absorption, condensation and other methods, it has the advantages of high treatment efficiency, no secondary pollution, large waste gas treatment volume, stable operation and low energy consumption.

[0003] The existing regenerative thermal oxidizer includes a regenerative chamber and a combustion chamber. The regenerative chamber and the combustion chamber are connected with an exhaust gas inlet pipe, a clean gas outlet pipe and a fresh air pipe. During use, a negative pressure purge method is used to clean the equipment. However, in actual use, in addition to volatile organic waste gas, the exhaust gas may also contain dust and other impurities. Therefore, blockage may occur during gas delivery or impurities may adhere to the pipe wall. In this case, negative pressure cleaning may not be able to completely clean it. Therefore, a cleaning method and device are needed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a cleaning method and device for an RTO regenerative thermal oxidizer, which can effectively clean the accumulation of impurities on the inner wall of the furnace and the pipeline and assist in cleaning the oxidation furnace.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A cleaning method for an RTO regenerative thermal oxidizer. After the waste gas has completed combustion for the first time, the combustion system is suspended, the solid impurities adsorbed in the intake pipe are cleaned, after gas-solid separation, the gas is circulated into the intake pipe for re-combustion treatment, and finally the oxidation furnace is closed and the solid impurities are taken out for cleaning.

[0007] A device for implementing the cleaning method of an RTO regenerative thermal oxidizer as described above, comprising a combustion chamber, a regenerative chamber, an intake pipe for conveying organic waste gas, an outlet pipe for outputting purified tail gas, and a fresh air supplement pipe. A cleaning component is provided inside the intake pipe. A circulation pipe is connected to the intake pipe. One end of the circulation pipe communicates with the middle section of the intake pipe, and the other end of the circulation pipe communicates with the intake end of the intake pipe. The cleaning component includes a scraping blade component and a driving mechanism for driving the scraping blade component to work. A filter screen is detachably installed in the middle section of the circulation pipe, and an air extraction pump is also provided on the circulation pipe.

[0008] Further, a primary filter screen is provided at the intake end of the intake pipe, and a secondary filter screen is provided at the end of the intake pipe communicating with the regenerative chamber.

[0009] Further, the scraping blade component includes a first scraping blade and a second scraping blade. Scraping teeth are staggered on the first scraping blade and the second scraping blade. A first gear is provided at the end of the first scraping blade, and a second gear is provided at the end of the second scraping blade. The driving component includes a first driving motor and a second driving motor. Output shafts of the first driving motor and the second driving motor are respectively fixedly connected with a first driving gear and a second driving gear. The first driving gear and the second driving gear are respectively meshed with the first gear and the second gear.

[0010] Further, the first driving motor and the second driving motor are respectively installed on the inner walls of both ends of the intake pipe, and protective shells are provided outside the first driving motor and the second driving motor.

[0011] Advantages of the present invention:

[0012] In an actual use scenario, when the waste gas combustion in the oxidizer is completed, the burner in the combustion chamber is turned off, the intake end of the intake pipe is closed, and at the same time, the outlet pipe and the fresh air supplement pipe are closed. The driving mechanism is started to drive the scraping blade component to clean the inner wall of the intake pipe. After the sundries attached to the inner wall of the intake pipe are scraped off, the air extraction pump on the circulation pipe is started, and the scraped sundries are sucked into the circulation pipe by the large suction force. The waste gas passes through the filter screen and enters the intake end of the intake pipe, and circulates into the intake pipe. The sundries are intercepted by the filter screen. After circulating for a certain period of time, the air extraction pump is turned off, and the combustion system is started to continue burning the remaining tail gas, and finally, it is swept by fresh air. After the combustion is completed, the filter screen is removed for cleaning and replacement. The present invention has a simple structure and is convenient to operate, and can effectively clean the sundries adsorbed in the intake pipe. Description of the Drawings

[0013] Figure 1 It is a schematic overall sectional structure diagram of the present invention;

[0014] Figure 2For the present invention Figure 1 Enlarged schematic view at position A;

[0015] Figure 3 Schematic structural diagram of the blade scraping assembly of the present invention. Specific embodiments

[0016] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present invention.

[0017] As Figures 1-3 shown, the present invention provides a cleaning method for an RTO regenerative thermal oxidizer. After the waste gas is initially burned, the combustion system is suspended, the solid impurities adsorbed in the intake pipe are cleaned, and after gas-solid separation, the gas circulates into the intake pipe for re-combustion treatment, and finally the oxidizer is closed to take out and clean the solid impurities.

[0018] The device used includes a combustion chamber 1, a regenerative chamber 2, an intake pipe 3 for transporting organic waste gas, an outlet pipe 4 for outputting purified tail gas, and a fresh air supplement pipe 5. A cleaning component 6 is arranged inside the intake pipe 3. A circulation pipe 7 is connected to the intake pipe 3. One end of the circulation pipe 7 communicates with the middle section of the intake pipe 3, and the other end of the circulation pipe 7 communicates with the intake end of the intake pipe 3. The cleaning component 6 includes a blade scraping component 61 and a driving mechanism 62 for driving the blade scraping component 61 to work. A filter screen 71 is detachably installed in the middle section of the circulation pipe 7, and an air extraction pump 72 is also arranged on the circulation pipe 7. In this embodiment, the conventional structure of the regenerative thermal oxidizer is not described in detail. When the waste gas combustion in the oxidizer is completed, the burner in the combustion chamber 1 is closed, the intake end of the intake pipe 3 is closed, and at the same time the outlet pipe 4 and the fresh air supplement pipe 5 are closed. The driving mechanism 62 is started to drive the blade scraping component 61 to clean the inner wall of the intake pipe 3. After the sundries attached to the inner wall of the intake pipe 3 are scraped off, the air extraction pump 72 on the circulation pipe 7 is started, and the scraped sundries are sucked into the circulation pipe 7 by the large suction force. The waste gas passes through the filter screen 71 and enters the intake end of the intake pipe 3, and circulates into the intake pipe 3, while the sundries are intercepted by the filter screen 71. After circulating for a certain period of time, the air extraction pump 72 is closed, the combustion system is started, and the remaining tail gas is continued to be burned, and finally blown by fresh air. After the combustion is completed, the filter screen 71 is removed for cleaning and replacement. This cleaning device has a simple structure and is easy to operate, and can effectively clean the sundries adsorbed in the intake pipe.

[0019] As Figure 2As shown, a primary filter 31 is provided at the air inlet end of the air inlet pipe 3, and a secondary filter 32 is provided at one end of the air inlet pipe 3 connected to the heat storage chamber 2; in this embodiment, the primary filter 31 provided at the air inlet end of the air inlet pipe 3 can block the entry of large particles of impurities, and the secondary filter 32 prevents solid impurities from accumulating and entering the heat storage chamber to cause blockage and affect the combustion efficiency.

[0020] like Figure 3 As shown, the scraper assembly 61 includes a first scraper 611 and a second scraper 612, the first scraper 611 and the second scraper 612 are staggered with scraping teeth, the end of the first scraper 611 is provided with a first gear 613, and the end of the second scraper 612 is provided with a second gear 614; the drive assembly 62 includes a first drive motor 621 and a second drive motor 622, the output shafts of the first drive motor 621 and the second drive motor 622 are respectively fixedly connected with a first drive gear 623 and a second drive gear 624, and the first drive gear 62 3 and the second driving gear 624 are respectively meshed with the first gear 613 and the second gear 614; in this embodiment, the first scraper 611 and the second scraper 612 are driven by the relative reverse rotation of the first driving motor 621 and the second driving motor 622 to alternately scrape the inner wall of the intake duct 3, and the first driving motor 621 and the second driving motor 622 are set to reciprocating motion using stepping motors. The setting parameters are conventional prior art in the field, so they are not described again. The first scraper 611 and the second scraper 612 cooperate with each other to complete the cleaning of the entire inner wall of the duct.

[0021] like Figure 3 As shown, the first drive motor 621 and the second drive motor 622 are respectively installed on the pipe walls at both ends of the intake pipe 3, and the first drive motor 621 and the second drive motor 622 are provided with protective shells. In this embodiment, the first drive motor 621 and the second drive motor 622 are respectively installed on the pipe walls at both ends of the intake pipe 3, so as to drive the first scraper 611 and the second scraper 612 to rotate respectively without affecting each other.

[0022] All technical features in this embodiment can be modified in appearance according to actual needs.

[0023] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A cleaning device for an RTO regenerative thermal oxidizer, comprising a combustion chamber (1), a regenerative chamber (2), an intake pipe (3) for conveying organic waste gas, an outlet pipe (4) for outputting purified tail gas, and a fresh air supplement pipe (5), characterized in that: A cleaning component (6) is provided inside the intake pipe (3). A circulating pipe (7) is connected to the intake pipe (3). One end of the circulating pipe (7) communicates with the middle section of the intake pipe (3), and the other end of the circulating pipe (7) communicates with the intake end of the intake pipe (3). The cleaning component (6) includes a scraping blade component (61) and a driving mechanism (62) for driving the scraping blade component (61) to work. A filter screen (71) is detachably installed in the middle section of the circulating pipe (7), and an air extraction pump (72) is also provided on the circulating pipe (7). When the waste gas combustion in the oxidation furnace is completed, the burner in the combustion chamber (1) is turned off, the intake end of the intake pipe (3) is closed, and at the same time, the outlet pipe (4) and the fresh air supplement pipe (5) are closed. The driving mechanism (62) is started to drive the scraping blade component (61) to clean the inner wall of the intake pipe (3). After the sundries attached to the inner wall of the intake pipe (3) are scraped off, the air extraction pump (72) on the circulating pipe (7) is started, and the scraped sundries are sucked into the circulating pipe (7) by the large suction force. The waste gas passes through the filter screen (71) and enters the intake end of the intake pipe, and circulates into the intake pipe (3). The sundries are intercepted by the filter screen. After circulating for a certain period of time, the air extraction pump (72) is turned off, the combustion system is started, and the remaining tail gas is continuously burned. Finally, it is blown by fresh air. After combustion, the filter screen is removed for cleaning and replacement.

2. The cleaning device of an RTO regenerative thermal oxidizer according to claim 1, characterized in that: A primary filter screen (31) is provided at the intake end of the intake pipe (3), and a secondary filter screen (32) is provided at the end where the intake pipe (3) communicates with the regenerator (2).

3. The cleaning device of an RTO regenerative thermal oxidizer according to claim 1, characterized in that: The scraping blade component (61) includes a first scraping blade (611) and a second scraping blade (612). Scraping teeth are arranged alternately on the first scraping blade (611) and the second scraping blade (612). A first gear (613) is provided at the end of the first scraping blade (611), and a second gear (614) is provided at the end of the second scraping blade (612). The driving mechanism (62) includes a first driving motor (621) and a second driving motor (622). Output shafts of the first driving motor (621) and the second driving motor (622) are respectively fixedly connected with a first driving gear (623) and a second driving gear (624). The first driving gear (623) and the second driving gear (624) are respectively meshed with the first gear (613) and the second gear (614).

4. The cleaning device of an RTO regenerative thermal oxidizer according to claim 3, characterized in that: The first driving motor (621) and the second driving motor (622) are respectively installed on the pipe walls at both ends of the intake pipe (3), and protective shells are provided outside the first driving motor (621) and the second driving motor (622).

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