Online baking type multi-groove heat accumulating type incineration loading system and method thereof

Abstract

The multi-tank heat storage type incineration system comprises a heat storage type combustion furnace, a first heat storage tank, a second heat storage tank, a third heat storage tank, an air outlet pipe, a purging pipe, a waste gas collecting valve and a waste gas collecting tank, an oxidation tank is arranged in the heat storage type combustion furnace, and the first heat storage tank, the second heat storage tank and the third heat storage tank are all connected with the oxidation tank; the first heat storage tank is connected with an exhaust emission device, connected with an exhaust collection valve through an exhaust pipe and connected with a purging valve through a purging pipe, the second heat storage tank is connected with the exhaust emission device, the second exhaust valve is connected with the exhaust collection valve through an exhaust pipe and connected with the purging valve through a purging pipe, and the third heat storage tank is connected with the exhaust emission device. The heat storage tank is connected with the waste gas collecting valve through the gas outlet pipe and connected with the purging valve through the purging pipe, the heat storage tank can be cleaned while waste gas is treated, shutdown or additional arrangement of standby organic waste gas treatment equipment is not needed, and the production and operation cost of an enterprise is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to an online baking multi-tank thermal storage incineration system and a method thereof. Background Art

[0002] A regenerative thermal incinerator is a type of organic waste gas treatment equipment. Based on the principle of high-temperature oxidation, it oxidizes organic pollutants in the exhaust gas into carbon dioxide and water in the high-temperature environment of an oxidation tank, effectively removing the vast majority of organic pollutants with high removal efficiency. The regenerative thermal incinerator's regenerative tank is filled with a heat storage element, which stores the heat released by the oxidation of organic pollutants and uses it to heat the low-temperature exhaust gas. A valve can periodically change the flow of gas within the regenerative thermal incinerator, cyclically altering the heat absorption and release of the heat storage element. This results in a high heat recovery efficiency. Therefore, regenerative thermal incinerators are widely used in waste gas treatment in industries such as petrochemicals, rubber, pharmaceuticals, synthetic resins, and food processing. Regenerative thermal incinerators can be divided into two-tank and multi-tank types (three or more with an odd number of tanks) based on the number of regenerative tanks. Due to the problem of emission concentration peaks, the two-tank type is rarely used in practice. The multi-tank type has become the mainstream choice for organic waste gas treatment in China.

[0003] Organic waste gas is generated from a variety of sources. Certain industries, such as synthetic resins, produce exhaust containing high-boiling-point or viscous substances. When using a regenerative thermal incinerator to treat such waste gas, these substances can condense or adhere to the pores of the cold zone of the regenerative tank and the lower regenerative body. Over time, these can lead to adverse effects such as decreased removal efficiency, overheating of the regenerative body bottom, and increased pressure loss in the regenerative bed. These can even cause fires within the lower regenerative body, seriously impacting the safe operation of the equipment. To address this issue, the Jiangsu Provincial Emergency Management Department's DB32 / T 4700-2024, "Safety Technical Requirements for Regenerative Thermal Incinerator Systems," clearly stipulates two requirements: Article 4.1.6: "Regenerative thermal incinerators should implement effective measures such as heating and regular cleaning to prevent condensation and deposition in pipes and the lower chamber of the regenerative thermal incinerator"; and Article 4.1.7: "Effective measures such as filtration should be implemented to strictly control the entry of viscous substances such as tar and paint mist." The "lower chamber" described in the standard is the "heat storage tank." When these substances are present in the exhaust gas, even with filters installed at the front end, they cannot completely prevent them from entering the regenerative thermal incinerator. This forces companies to regularly shut down the furnace for cleaning and switch the regenerative thermal incinerator to "offline baking" mode.

[0004] The "offline baking" mode of the regenerative thermal incinerator closes the exhaust gas inlet valve to cut off the exhaust gas introduction, opens the fresh air valve, and uses air as the operating medium of the incinerator. By adjusting the valve switching cycle and other methods to increase the temperature of the regenerative thermal incinerator, the organic pollutants condensed or adhered therein are volatilized and transported to the oxidation tank along with the air, where the pollutants are destroyed in the high-temperature environment of the oxidation tank. Because the introduction of exhaust gas must be stopped, the company has to stop production or install additional backup organic waste gas treatment equipment. If the adhesion is serious, the frequency of offline high-temperature baking will need to be increased, which will have a very negative impact on the company's continuous production. In addition, it takes a long time for the regenerative thermal incinerator to return to an online state where it can treat exhaust gas from an offline state. This will greatly increase the company's production and operating costs. Summary of the Invention

[0005] In order to solve the problem that traditional incineration devices must be shut down for cleaning, the present invention provides a multi-tank regenerative incineration device, comprising: a regenerative combustion furnace, an exhaust gas discharge device, a first regenerative tank, a second regenerative tank, a third regenerative tank, a purge fan and an exhaust gas collection valve;

[0006] An oxidation tank is provided in the regenerative combustion furnace;

[0007] Exhaust gas is stored in the exhaust gas discharge device;

[0008] The first heat storage tank, the second heat storage tank and the third heat storage tank are all connected to the oxidation tank, and the first heat storage tank is respectively connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve, the second heat storage tank is respectively connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve, and the third heat storage tank is respectively connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve.

[0009] In a possible implementation, it further includes a control terminal;

[0010] The control terminal is in communication with the purge blower, the exhaust gas discharge device and the exhaust gas collection valve to control the opening or closing of the purge blower, the exhaust gas discharge device and the exhaust gas collection valve;

[0011] The first heat storage tank is connected to the exhaust gas discharge device, the second heat storage tank is connected to the purge blower, and the third heat storage tank is connected to the exhaust gas collection valve; or

[0012] The first heat storage tank is connected to the purge fan, the second heat storage tank is connected to the exhaust gas collection valve, and the third heat storage tank is connected to the exhaust gas discharge device; or

[0013] The first heat storage tank is communicated with the exhaust gas collecting valve, the second heat storage tank is communicated with the exhaust gas discharge device, and the third heat storage tank is communicated with the purge fan.

[0014] A multi-tank regenerative incineration system, comprising the multi-tank regenerative incineration device described above, further comprising: a first air inlet valve, a first air outlet valve, a first purge valve, a second air inlet valve, a second air outlet valve, a second purge valve, a third air inlet valve, a third air outlet valve, and a third purge valve;

[0015] The first heat storage tank is respectively connected to the first air inlet valve, the first air outlet valve and the first purge valve, the first air inlet valve is connected to the exhaust gas discharge device, the first air outlet valve is connected to the exhaust gas collecting valve, and the first purge valve is connected to the purge valve. The second heat storage tank is respectively connected to the second air inlet valve, the second air outlet valve and the second purge valve, the second air inlet valve is connected to the exhaust gas discharge device, the second air outlet valve is connected to the exhaust gas collecting valve, and the second purge valve is connected to the purge valve. The third heat storage tank is respectively connected to the third air inlet valve, the third air outlet valve and the third purge valve, the third air inlet valve is connected to the exhaust gas discharge device, the outlet pipe of the third air outlet valve is connected to the exhaust gas collecting valve, and the third purge valve is connected to the purge valve.

[0016] In a possible implementation, it further includes: an air inlet pipe, a system fan, a purge pipe, and an air outlet pipe;

[0017] The system fan, the first air intake valve, the second air intake valve and the third air intake valve are sequentially connected to the air intake pipe;

[0018] The first purge valve, the second purge valve, the third purge valve and the purge blower are sequentially connected to the purge pipe;

[0019] The first air outlet valve, the second air outlet valve and the third air outlet valve are connected to the air outlet pipe in sequence.

[0020] In a possible implementation, the device further includes: a heater;

[0021] The heater is arranged on the purge pipe and is located between the third purge valve and the purge blower, and the purge wind direction of the purge blower is toward the heater.

[0022] In a possible implementation, the system further includes: an exhaust gas collection tank, an exhaust gas collection fan, and an exhaust gas collection pipe;

[0023] The exhaust gas collection tank is connected to the exhaust gas collection fan, and the exhaust gas collection tank is connected to the air intake manifold through the exhaust gas collection pipe, and the connection position is located between the system fan and the exhaust gas outlet;

[0024] The exhaust gas collecting fan is arranged on the exhaust gas collecting pipe.

[0025] In a possible implementation, the exhaust gas collecting fan is turned on, and the heater is turned on;

[0026] The third purge valve is opened, and the first air inlet valve and the second air outlet valve are opened alternately with the second air inlet valve and the first air outlet valve; or

[0027] The first purge valve is opened, and the third air inlet valve and the second air outlet valve are opened alternately with the second air inlet valve and the third air outlet valve; or

[0028] The second purge valve is opened, and the first air inlet valve and the third air outlet valve are opened alternately with the third air inlet valve and the first air outlet valve.

[0029] In a possible implementation, the device further includes: a chimney;

[0030] The chimney is connected to the exhaust gas collecting fan and the exhaust gas collecting tank respectively.

[0031] A control method, including the above-mentioned multi-tank thermal storage incineration device and the system thereof, comprises the following steps:

[0032] Turning on the purge fan;

[0033] Preset first start and stop times of the first air inlet valve, the first air outlet valve, the first purge valve, the second air inlet valve, the second air outlet valve, the second purge valve, the third air inlet valve, the third air outlet valve, and the third purge valve;

[0034] The waste gas collecting valve obtains the treated waste gas.

[0035] In a possible implementation, the following steps are also included:

[0036] Turning on the heater and the exhaust gas collecting fan;

[0037] Preset second start and stop times for the first air inlet valve, the first air outlet valve, the first purge valve, the second air inlet valve, the second air outlet valve, the second purge valve, the third air inlet valve, the third air outlet valve, and the third purge valve;

[0038] The heater bakes the first heat storage tank, the second heat storage tank, and the third heat storage tank in sequence.

[0039] The multi-tank heat storage incineration system and method of the embodiment of the present application have the beneficial effects of: the heat storage tank can be cleaned while treating the waste gas, without stopping the machine or setting up a spare organic waste gas treatment equipment, which is beneficial to the company's continuous production and saving construction costs, and the two modes of the device are simple to switch and easy to operate, which can effectively help the company reduce production and operation costs. Specifically, in the normal working mode, the first heat storage tank, the second heat storage tank and the third heat storage tank are included, one of the heat storage tanks is in the air intake state, and the air intake processes the exhaust gas, one of the heat storage tanks is in the air outlet state, and the treated exhaust gas is discharged, and one of the heat storage tanks is in the purge state, and the slot of the heat storage tank is purged to blow the exhaust gas remaining in the cold zone of the heat storage tank back to the air intake manifold to avoid leakage into the chimney. In the online baking mode, the first heat storage tank, the second heat storage tank and the third heat storage tank are included, one of the heat storage tanks is in the air intake state, and the air intake processes the exhaust gas, one of the heat storage tanks is in the air outlet state, and the treated exhaust gas is discharged, and one of the heat storage tanks is in the baking state, and the heat storage tank is baked by the heater and the purge fan, while the other two heat storage tanks are working normally and can continuously complete the exhaust gas treatment. In this way, one of the heat storage tanks can be cleaned while the exhaust gas treatment can be completed.

[0040] Among them, it should be noted that the exhaust gas collection tank fan is used to collect the exhaust gas remaining in the cold zone of the heat storage tank in the pipeline to prevent it from leaking into the chimney for subsequent discharge. This exhaust gas is generated when the heat storage tank switches from the air intake state to the air outlet state.

[0041] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0043] Figure 1 A schematic diagram of the main structure of a multi-tank thermal storage incineration system and method thereof according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0044] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0045] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0047] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0048] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0049] like Figure 1 As shown, the multi-tank heat storage incineration device of the embodiment of the present application includes: a heat storage combustion furnace 3, an exhaust gas discharge device, a first heat storage tank 11, a second heat storage tank 15, a third heat storage tank 19, a purge fan 4 and an exhaust gas collecting valve 6. An oxidation tank 22 is provided in the heat storage combustion furnace 3, and exhaust gas is stored in the exhaust gas discharge device. The first heat storage tank 11, the second heat storage tank 15 and the third heat storage tank 19 are all connected to the oxidation tank 22, and the first heat storage tank 11 is respectively connected to the exhaust gas discharge device, the purge fan 4 and the exhaust gas collecting valve 6, the second heat storage tank 15 is respectively connected to the exhaust gas discharge device, the purge fan 4 and the exhaust gas collecting valve 6, and the second heat storage tank 15 is respectively connected to the exhaust gas discharge device, the purge fan 4 and the exhaust gas collecting valve 6.

[0050] In this embodiment, by adopting a three-tank structure, the air intake, air outlet, and purge function cycles of the first heat storage tank 11, the second heat storage tank 15, and the third heat storage tank 19 are realized respectively by valve switching. The oxidation tank 22 serves as the core of the high-temperature reaction, in which the exhaust gas is oxidized and decomposed. The exhaust gas collection valve 6 is used to collect the escaped exhaust gas generated during the switching process to avoid direct emission. Among them, the exhaust gas remaining in the cold zone of the heat storage tank is blown back to the air intake manifold through any one of the first heat storage tank 11, the second heat storage tank 15, and the third heat storage tank 19 to avoid leakage into the chimney. The other two heat storage tanks complete the exhaust gas treatment normally. The independent design of the three tanks also reduces the load of a single heat storage tank and extends the service life of the equipment. Through the synergistic effect of the oxidation tank 22 and the heat storage tank, the heat recovery efficiency is greatly improved, and the modular structure facilitates equipment maintenance. The failure of a single tank does not affect the overall operation, thereby improving the reliability of the system.

[0051] Specifically, in this specific embodiment, when the first heat storage tank 11 is purged, the second heat storage tank 15 takes in air and the third heat storage tank 19 discharges air, so that the exhaust gas enters the oxidation tank 22 from the second heat storage tank 15 and then the treated exhaust gas is discharged from the third heat storage tank 19.

[0052] In a specific embodiment, a control terminal is further included, which is in communication with the purge blower 4, the exhaust gas discharge device, and the exhaust gas collection valve 6 to control the opening or closing of the purge blower 4, the exhaust gas discharge device, and the exhaust gas collection valve 6. The control terminal automatically switches the valve state through a preset program to complete the opening, closing, or purging of the first heat storage tank 11, the second heat storage tank 15, and the heat storage tank.

[0053] Among them, when the first heat storage tank 11 is connected to the exhaust gas discharge device, the second heat storage tank 15 is connected to the exhaust gas collection valve 6, and the third heat storage tank 19 is connected to the purge fan 4, the first heat storage tank 11 is connected to the exhaust gas discharge device, the exhaust gas is processed in the oxidation tank 22, and then discharged through the second heat storage tank 15, and the third heat storage tank 19 is purged by the exhaust gas fan.

[0054] Alternatively, when the second heat storage tank 15 is connected to the exhaust gas discharge device, the third heat storage tank 19 is connected to the exhaust gas collection valve 6, and the first heat storage tank 11 is connected to the purge fan 4, the exhaust gas from the exhaust gas discharge device is introduced into the second heat storage tank 15, the exhaust gas is processed in the oxidation tank 22, and then discharged through the third heat storage tank 19, and the first heat storage tank 11 is purged by the exhaust gas fan.

[0055] Alternatively, when the third heat storage tank 19 is connected to the exhaust gas discharge device, the first heat storage tank 11 is connected to the exhaust gas collection valve 6, and the second heat storage tank 15 is connected to the purge fan 4, the third heat storage tank 19 is connected to the exhaust gas discharge device, the exhaust gas is processed in the oxidation tank 22, and then discharged through the first heat storage tank 11, and the second heat storage tank 15 is purged by the exhaust gas fan.

[0056] According to the above embodiment, the number of heat storage tanks can be more than 3, and when the number of heat storage tanks is odd, only one tank is in the purge state, and the remaining heat storage tanks are evenly divided into the air intake state and the air outlet state, that is, the number of air intake tanks and air outlet tanks is the same.

[0057] A multi-tank thermal storage incineration system, including the above multi-tank thermal storage incineration device, further comprising: a first air inlet valve 10, a first air outlet valve 12, a first purge valve 13, a second air inlet valve 14, a second air outlet valve 16, a second purge valve 17, a third air inlet valve 18, a third air outlet valve 20 and a third purge valve 21, the first thermal storage tank 11 is respectively connected to the first air inlet valve 10, the first air outlet valve 12 and the first purge valve 13, the first air inlet valve 10 is connected to the exhaust gas discharge device, the first air outlet valve 12 is connected to the exhaust gas collection valve 6, the first purge valve 13 is connected to the purge valve, the second heat storage tank 15 is respectively connected to the second air inlet valve 14, the second air outlet valve 16 and the second purge valve 17, the second air inlet valve 14 is connected to the exhaust gas discharge device, the second air outlet valve 16 is connected to the exhaust gas collection valve 6, and the second purge valve 17 is connected to the purge valve. The third heat storage tank 19 is respectively connected to the third air inlet valve 18, the third air outlet valve 20 and the third purge valve 21, the third air inlet valve 18 is connected to the exhaust gas discharge device, the outlet pipe of the third air outlet valve 20 is connected to the exhaust gas collection valve 6, and the third purge valve 21 is connected to the purge valve. The opening and closing of different valves are controlled by the control terminal respectively, so that when one of the heat storage tanks is purged, the other two heat storage tanks can normally complete the entry and discharge of exhaust gas.

[0058] In this specific embodiment, independent valve configurations provide precise airflow control for each heat storage tank. Specifically, the combined design of the inlet, outlet, and purge valves shortens the response time for switching between heat storage tank functions, reducing energy loss during the switching process. The modular valve structure facilitates individual maintenance and replacement, minimizing downtime for repairs. Adjusting the valve opening allows for precise control of the air flow to each tank, ensuring uniform heating of the heat storage element. Furthermore, the valve's sealing design effectively prevents exhaust gas cross-flow, improving treatment efficiency.

[0059] In a specific embodiment, the system further includes: an air intake pipe, a system blower, a purge pipe, and an air outlet pipe. The system blower, the first air intake valve 10, the second air intake valve 14, and the third air intake valve 18 are sequentially connected to the air intake pipe. The first purge valve 13, the second purge valve 17, the third purge valve 21, and the purge blower 4 are sequentially connected to the purge pipe. The first air outlet valve 12, the second air outlet valve 16, and the third air outlet valve 20 are sequentially connected to the air outlet pipe. Thus, the first heat storage tank 11 is connected to the air intake manifold via the first air intake valve 10, the second heat storage tank 15 is connected to the air intake pipe via the second air intake valve 14, and the third heat storage tank 19 is connected to the air intake pipe via the third air intake valve 18. The intake manifold is connected to the exhaust gas discharge device. The first, second, and third heat storage tanks 11, 15, and 19 are connected to the intake pipe via their respective intake valves. The system fan provides power for the flow of exhaust gas, transporting it from the exhaust gas discharge device through the intake pipe to each heat storage tank. A purge fan 4 is installed on the purge pipe, located between the third purge valve 21 and the exhaust gas collection valve 6. The purge fan 4 blows toward the first, second, and third heat storage tanks 11, 15, and 19.

[0060] In this specific embodiment, the independent layout of the inlet, purge, and outlet pipes reduces airflow interference and lowers system pressure loss. The coordinated operation of the system fan and purge blower 4 ensures a dynamic balance between exhaust gas treatment capacity and purge air volume. The purge pipe is made of high-temperature resistant material and can withstand airflows up to 350°C, extending its service life.

[0061] Among them, the air inlet pipe, purge pipe and outlet pipe are independently set and not connected to each other, so that the overall system can independently complete the air intake, air outlet and purge of the oxidation tank 22. When one heat storage tank is purged, the other two heat storage tanks are connected to the oxidation tank 22 to complete the entry, treatment and discharge of exhaust gas.

[0062] According to the above embodiment, the device further includes a heater 5, which is disposed on the purge pipe and located between the third purge valve 21 and the purge fan 4. The purge airflow of the purge fan 4 is directed toward the heater 5. The heater 5 and the purge fan 4 can provide heat energy to the heat storage tank to treat sticky conditions in the heat storage tank.

[0063] In this specific embodiment, the heater 5 preheats the purge air generated by the purge fan 4 to a temperature of 250-350°C. This temperature needs to be adjusted according to the different pollutant components to ensure the effective volatilization of high-boiling-point substances. The purge fan 4 provides a directional airflow to enhance the baking effect. Specifically, three heat storage tanks are arranged in sequence. The heater 5 is installed on the purge pipe and is located between the third heat storage tank 19 and the exhaust gas collection valve 6. Its function is to heat the purge gas. The purge fan 4 is also on the purge pipe, located between the heater 5 and the exhaust gas collection valve 6, and its purge direction is toward the three heat storage tanks. In this way, when the heat storage tank needs to be heated and cleaned, the heater 5 can heat the purge gas to a suitable temperature, and then blow the hot purge gas into the heat storage tank through the purge fan 4. The presence of heater 5 ensures that the purge gas reaches a higher temperature, more effectively removing any high-boiling-point substances and viscous impurities that may be present in the heat storage tank, preventing their accumulation and impacting equipment performance. The directional airflow provided by purge blower 4 ensures that the hot purge gas is evenly distributed across the heat storage tank, enhancing the cleaning effect. Furthermore, this arrangement allows for effective cleaning and maintenance during equipment operation without requiring downtime, significantly improving equipment efficiency and reducing production losses caused by downtime for maintenance.

[0064] In one specific embodiment, the system further includes: an exhaust gas collection tank 7, an exhaust gas collection fan 8, and an exhaust gas collection pipe 32. The exhaust gas collection tank 7 is connected to the exhaust gas collection fan, and the exhaust gas collection tank 7 is connected to the air intake manifold through the exhaust gas collection pipe 32, the connection position being between the system fan and the exhaust gas outlet. The exhaust gas collection fan 8 is disposed on the exhaust gas collection pipe 32. The exhaust gas collection tank is connected to the exhaust gas collection fan and chimney 9, and is connected to the air intake pipe through the exhaust gas collection pipe 32, the connection position being between the system fan and the exhaust gas discharge device. The exhaust gas collection fan 8 is disposed on the exhaust gas collection pipe 32. The exhaust gas collection tank is connected to the exhaust gas collection fan and chimney 9, and is also connected to the air intake pipe through the exhaust gas collection pipe 32, the connection position being between the system fan and the exhaust gas outlet. The exhaust gas collection fan 8 is mounted on the exhaust gas collection pipe 32, and its function is to transport the exhaust gas in the exhaust gas collection tank back to the air intake pipe, thereby achieving waste gas recycling treatment.

[0065] In this embodiment, the exhaust gas collection tank collects untreated exhaust gas generated during operation, preventing it from being directly discharged into the environment. The combination of exhaust gas collection fan 8 and exhaust gas collection pipe 32 allows this exhaust gas to be re-entered into the intake manifold for further treatment, thereby improving the exhaust gas treatment rate and reducing pollutant emissions. Furthermore, this exhaust gas recycling method fully utilizes the energy contained in the exhaust gas, reducing energy waste and further reducing the operating costs of the equipment.

[0066] In a specific embodiment, it further includes: a chimney 9, which is connected to the exhaust gas collection valve 6 and the exhaust gas collection tank 7 respectively, and is used to collect and discharge the treated exhaust gas.

[0067] In a specific embodiment, the multi-tank heat storage incineration device includes a normal mode and a baking mode. The normal mode is 1 heat storage tank air intake, 1 heat storage tank air outlet and 1 heat storage tank purge. The baking mode is 1 heat storage tank air intake, 1 heat storage tank air outlet and 1 heat storage tank baking.

[0068] Among them, when the multi-tank heat storage incineration device is in normal mode, referring to Table 1, the first air inlet valve 10 is opened, the second air outlet valve 16 is opened, and the third purge valve 21 is opened, or the first purge valve 13 is opened, the second air inlet valve 14 is opened, and the third air outlet valve 20 is opened, or the first air outlet valve 12 is opened, the second purge valve 17 is opened, and the third air inlet valve 18 is opened. Through the periodic valve opening combination method, the three heat storage tanks can alternately perform air intake, air outlet, and purge operations, ensuring the continuity of the waste gas treatment process. While taking in air, other heat storage tanks can discharge air and purge, which improves the overall operating efficiency of the equipment. The purge operation can promptly remove residual untreated waste gas in the cold zone of the heat storage tank, maintain the good performance of the heat storage tank, and extend the service life of the equipment. At the same time, this orderly switching method makes the operation of the equipment more stable and reduces the probability of failure caused by improper operation or confusion. The system fan is running, the purge fan 4 is running, the exhaust gas collection fan 8 is off, and the heater 5 is off. The exhaust gas flows in this order: exhaust gas passes through the system fan, the air intake manifold, the first air intake valve 10, the first heat storage tank 11, the oxidation tank 22, the second heat storage tank 15, the second air outlet valve 16, the air outlet pipe, the exhaust gas collection valve 6, and the chimney 9. The purge air flow is as follows: a portion of the treated clean flue gas is used as the purge air, which passes through the purge fan 4, the heater 5, the purge pipe, the third purge valve 21, the third heat storage tank 19, the oxidation tank 22, the second air outlet valve 16, the air outlet manifold, the exhaust gas collection valve 6, and the chimney 9. There is no gas in the exhaust gas collection tank, and no gas in the exhaust gas collection pipe 32. This cycle lasts for 1.5 to 2 minutes, after which the valve status is switched to change the function of each heat storage tank.

[0069]

[0070] Table 1

[0071] When the multi-tank regenerative incinerator is in baking mode, referring to Table 2, when the multi-tank regenerative incinerator is in online baking mode, the exhaust gas collection fan 8 is turned on, the heater 5 is turned on, the first air inlet valve 10 is opened, the second air outlet valve 16 is opened and the third purge valve 21 is opened, or the first purge valve 13 is opened, the second air inlet valve 14 is opened and the third air outlet valve 20 is opened, or the first air outlet valve 12 is opened, the second purge valve 17 is opened and the third air inlet valve 18 is opened.

[0072]

[0073]

[0074] Table 2

[0075] In Example 1, when the first heat storage tank 11 is the air inlet tank, the second heat storage tank 15 is the air outlet tank, and the third heat storage tank 19 is in the baking state, after 1.5 to 2 minutes of operation, the first heat storage tank 11 is switched to the air outlet tank, the second heat storage tank 15 is switched to the air inlet tank, and the third heat storage tank 19 is still in the baking state. When the first heat storage tank 11 and the second heat storage tank 15 switch the functions of air inlet and air outlet, the exhaust gas in the first heat storage tank 11 that has not yet entered the oxidation tank 22 will be pushed out by the clean flue gas, and reach the exhaust main pipe together with the clean flue gas and be discharged into the chimney 9, thereby causing a peak in pollutant emission concentration. Therefore, the exhaust gas collection valve 6 will act in advance 1 to 2 seconds before the first heat storage tank 11 and the second heat storage tank 15 perform the function conversion. The valve stem of the exhaust gas collection valve 6 is lifted upward, the upper valve plate contacts the upper valve seat, and the above-mentioned exhaust gas is introduced into the exhaust gas collection tank. This process lasts for 2 to 4 seconds. Then the valve stem of the exhaust gas collecting valve 6 falls back, the lower valve plate contacts the lower valve seat, and the exhaust gas in the exhaust gas collecting tank is sent back to the exhaust gas inlet by the exhaust gas collecting fan 8.

[0076] When the third purge valve 21 is open, the first air inlet valve 10 and the second air outlet valve 16 are opened alternately with the second air inlet valve 14 and the first air outlet valve 12. Thus, in the online baking mode, when one heat storage tank is baking and cleaning, the air inlet valves and air outlet valves of the other two heat storage tanks are opened and closed alternately, allowing the heat storage tanks to be cleaned while still completing exhaust gas treatment.

[0077] A control method comprises the following steps:

[0078] Turn on the purge fan 4;

[0079] In this specific step, by turning on the purge fan 4, the heat storage tank can be purged in normal mode, reducing the residence of the exhaust gas in the heat storage tank, thereby preventing the exhaust gas from sticking to the inner wall of the heat storage tank.

[0080] Preset first start and stop times of the first air inlet valve 10, the first air outlet valve 12, the first purge valve 13, the second air inlet valve 14, the second air outlet valve 16, the second purge valve 17, the third air inlet valve 18, the third air outlet valve 20 and the third purge valve 21;

[0081] In this specific step, the first start and stop times are pre-set for the first air inlet valve 10, first air outlet valve 12, first purge valve 13, second air inlet valve 14, second air outlet valve 16, second purge valve 17, third air inlet valve 18, third air outlet valve 20, and third purge valve 21. By precisely controlling the opening and closing times of these valves, the alternating air intake, air outlet, and purge functions of the three heat storage tanks are achieved, allowing the exhaust gas to be continuously and stably treated within the device.

[0082] Among them, the exhaust gas discharge device is connected to the system fan, the system fan is connected to the intake manifold, the intake pipe is connected to the first intake valve 10, the second intake valve 14 and the third intake valve 18 respectively, the first heat storage tank 11 is connected to the first intake valve 10, the first outlet valve 12 and the first purge valve 13, the second heat storage tank 15 is connected to the second intake valve 14, the second outlet valve 16 and the second purge valve 17, the third heat storage tank 19 is connected to the third intake valve 18, the first outlet valve 12 and the first purge valve 1 3. The first heat storage tank 11, the second heat storage tank 15 and the third heat storage tank 19 are connected to the oxidation tank 22 and are separated from each other. The outlet pipes are respectively connected to the first outlet valve 12, the second outlet valve 16 and the third outlet valve 20. The purge main pipe 30 is respectively connected to the first purge valve 13, the second purge valve 17 and the third purge valve 21. The purge pipe is connected to the purge fan 4, the purge fan 4 is connected to the outlet pipe, the outlet pipe is connected to the exhaust gas collection valve 6, the exhaust gas collection valve 6 is connected to the chimney 9, the exhaust gas collection valve 6. Thus, during a normal mode cycle, the valve states are: first air inlet valve 10 open, first outlet valve 12 closed, first purge valve 13 closed; second air inlet valve 14 closed, second outlet valve 16 open, second purge valve 17 closed; third air inlet valve 18 closed, third outlet valve 20 closed, third purge valve 21 open; the lower valve plate of exhaust gas collection valve 6 is located on the lower valve seat; and the fan states are: system fan running, purge fan 4 running, exhaust gas collection fan 8 closed, and heater 5 closed. The exhaust gas flows in the following order: exhaust gas passes through the system fan, air inlet pipe, first air inlet valve 10, first heat storage tank 11, oxidation tank 22, second heat storage tank 15, second outlet valve 16, air outlet pipe, exhaust gas collection valve 6, and chimney 9. The purge airflow is as follows: a portion of the treated clean flue gas is used as the purge air, which passes sequentially through the purge fan 4, the purge pipe, the third purge valve, the third heat storage tank 19, the oxidation tank 22, the outlet valve of the second heat storage tank 15, the outlet pipe, the exhaust gas collection valve 6, and the chimney 9. There is no gas in the exhaust gas collection tank 7, and there is no gas in the exhaust gas collection pipe 32. This cycle lasts for 1.5 to 2 minutes, after which the valve status is switched to change the function of each heat storage tank. This 1.5 to 2 minute cycle is the first start-stop time.

[0083] The waste gas collection valve 6 obtains the treated waste gas;

[0084] In this specific step, the waste gas treated by the regenerative incineration device is collected by the waste gas collection valve 6 to ensure that the treated waste gas meets environmental protection standards and is discharged or subjected to subsequent treatment.

[0085] In a specific embodiment, the following steps are also included:

[0086] Turn on the heater 5 and the exhaust gas collecting fan 8;

[0087] In this specific step, when the heat storage tank needs to be maintained and baked online, the heater 5 and the exhaust gas collection fan 8 are turned on. The heater 5 is used to increase the temperature of the purge air, and the exhaust gas collection fan 8 is responsible for collecting and processing the exhaust gas generated during the baking process.

[0088] Preset second start and stop times for the first air inlet valve 10, the first air outlet valve 12, the first purge valve 13, the second air inlet valve 14, the second air outlet valve 16, the second purge valve 17, the third air inlet valve 18, the third air outlet valve 20, and the third purge valve 21;

[0089] In this specific step, the heat storage tank in the baking function needs to be kept at a temperature of 250-350°C for about 60 minutes. This temperature and baking time need to be adjusted according to the different pollutant components. The switching cycle of the remaining two heat storage tanks is still 1.5-2 minutes. When the first heat storage tank 11 is the air inlet tank, the second heat storage tank 15 is the air outlet tank, and the third heat storage tank 19 is in the baking state, after running for 1.5-2 minutes, the first heat storage tank 11 is switched to the air outlet tank, the second heat storage tank 15 is switched to the air inlet tank, and the third heat storage tank 19 is still in the baking state. When the first heat storage tank 11 and the second heat storage tank 15 switch the air inlet and air outlet functions, the exhaust gas in the first heat storage tank 11 that has not yet entered the oxidation tank 22 will be pushed out by the clean flue gas, and reach the outlet pipe together with the clean flue gas and be discharged into the chimney 9, thereby causing a peak in the pollutant emission concentration. Therefore, the exhaust gas collection valve 6 will preemptively operate 1 to 2 seconds before the first heat storage tank 11 and the second heat storage tank 15 switch functions. The valve stem of the exhaust gas collection valve 6 is lifted upward, and the upper valve disc contacts the upper valve seat, directing the above-mentioned exhaust gas into the exhaust gas collection tank 7. This process lasts for 2 to 4 seconds. Then, the valve stem of the exhaust gas collection valve 6 drops back, and the lower valve disc contacts the lower valve seat. The exhaust gas in the exhaust gas collection tank 7 is returned to the exhaust gas inlet by the exhaust gas collection fan 8. In this way, the second start-stop time of the heat storage tank in the baking state is 60 minutes, and the switching cycle of the other two heat storage tanks is 1.5 to 2 minutes.

[0090] The heater 5 bakes the first heat storage tank 11, the second heat storage tank 15 and the third heat storage tank 19 in sequence;

[0091] In this specific step, the heater 5 bakes the first heat storage tank 11, the second heat storage tank 15 and the third heat storage tank 19 in sequence, using high temperature to volatilize and decompose the high-boiling point viscous substances in the heat storage body to restore the performance of the heat storage body.

[0092] It should be noted that this application includes two modes: normal mode and baking mode. The differences between the two modes are:

[0093] First, the heat storage tank function switching method is different. First, in normal mode, each heat storage tank will periodically switch between the three functions of air intake, air exhaust, and purge, and cycle back and forth. In online baking mode, only the first heat storage tank 11 and the second heat storage tank 15 will periodically switch between the two functions of air intake and air exhaust, and cycle back and forth. The third heat storage tank 19 will remain in a high-temperature baking state until baking is completed. Thereafter, the first heat storage tank 11 will be subjected to high-temperature baking again, and the second heat storage tank 15 and the third heat storage tank 19 will periodically switch between the two functions of air intake and air exhaust, and cycle back and forth. And so on, when each heat storage tank has been baked at high temperature, the device can be switched to normal mode.

[0094] Second, in normal mode, the heater 5 is in the off state. In online baking mode, the electric heater is in the on state, which is used to increase the temperature of the purge air, volatilize the high boiling point or sticky substances adhering to the bottom heat storage body, and enter the oxidation chamber together with the purge air.

[0095] Third, the operating states of exhaust gas collection fan 8 differ. In normal mode, exhaust gas collection fan 8 is off or operating at minimum capacity. In online baking mode, exhaust gas collection fan 8 is fully loaded. The exhaust gas collection tank 7 stores untreated exhaust gas, which escapes when the two heat storage tanks switch between intake and exhaust functions. This exhaust gas is returned to the device inlet by exhaust gas collection fan 8.

[0096] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A multi-tank thermal storage incineration device, characterized in that: include: Regenerative combustion furnace, first heat storage tank, second heat storage tank, third heat storage tank, purge fan and exhaust gas collection valve; An oxidation tank is provided in the regenerative combustion furnace; The first heat storage tank, the second heat storage tank and the third heat storage tank are all connected to the oxidation tank, and the first heat storage tank is respectively suitable for being connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve, the second heat storage tank is respectively connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve, and the third heat storage tank is respectively connected to the exhaust gas discharge device, the purge fan and the exhaust gas collection valve.

2. The multi-tank thermal storage incineration device according to claim 1, characterized in that: Also includes a control terminal; The control terminal is in communication with the purge blower, the exhaust gas discharge device and the exhaust gas collection valve to control the opening or closing of the purge blower, the exhaust gas discharge device and the exhaust gas collection valve; The first heat storage tank is connected to the exhaust gas discharge device, the second heat storage tank is connected to the purge blower, and the third heat storage tank is connected to the exhaust gas collection valve; or The first heat storage tank is connected to the purge fan, the second heat storage tank is connected to the exhaust gas collection valve, and the third heat storage tank is connected to the exhaust gas discharge device; or The first heat storage tank is communicated with the exhaust gas collecting valve, the second heat storage tank is communicated with the exhaust gas discharge device, and the third heat storage tank is communicated with the purge fan.

3. A multi-tank regenerative incineration system, comprising the multi-tank regenerative incineration device according to any one of claims 1 to 2, characterized in that: Also includes: a first air inlet valve, a first air outlet valve, a first purge valve, a second air inlet valve, a second air outlet valve, a second purge valve, a third air inlet valve, a third air outlet valve, and a third purge valve; The first heat storage tank is respectively connected to the first air inlet valve, the first air outlet valve and the first purge valve, the first air inlet valve is connected to the exhaust gas discharge device, the first air outlet valve is connected to the exhaust gas collecting valve, and the first purge valve is connected to the purge valve. The second heat storage tank is respectively connected to the second air inlet valve, the second air outlet valve and the second purge valve, the second air inlet valve is connected to the exhaust gas discharge device, the second air outlet valve is connected to the exhaust gas collecting valve, and the second purge valve is connected to the purge valve. The third heat storage tank is respectively connected to the third air inlet valve, the third air outlet valve and the third purge valve, the third air inlet valve is connected to the exhaust gas discharge device, the outlet pipe of the third air outlet valve is connected to the exhaust gas collecting valve, and the third purge valve is connected to the purge valve.

4. The multi-tank thermal storage incineration system according to claim 3, characterized in that: Also includes: Inlet pipe, system fan, purge pipe and outlet pipe; The system fan, the first air intake valve, the second air intake valve and the third air intake valve are sequentially connected to the air intake pipe; The first purge valve, the second purge valve, the third purge valve and the purge blower are sequentially connected to the purge pipe; The first air outlet valve, the second air outlet valve and the third air outlet valve are connected to the air outlet pipe in sequence.

5. The multi-tank thermal storage incineration system according to claim 4, characterized in that: Also includes: heater; The heater is arranged on the purge pipe and is located between the third purge valve and the purge blower, and the purge wind direction of the purge blower is toward the heater.

6. The multi-tank thermal storage incineration system according to claim 5, characterized in that: Also includes: Exhaust gas collection tank, exhaust gas collection fan and exhaust gas collection pipe; The exhaust gas collection tank is connected to the exhaust gas collection fan, and the exhaust gas collection tank is connected to the air intake manifold through the exhaust gas collection pipe, and the connection position is located between the system fan and the exhaust gas outlet; The exhaust gas collecting fan is arranged on the exhaust gas collecting pipe.

7. The multi-tank thermal storage incineration system according to claim 6, characterized in that: The exhaust gas collecting fan is turned on, and the heater is turned on; The third purge valve is opened, and the first air inlet valve and the second air outlet valve are opened alternately with the second air inlet valve and the first air outlet valve; or The first purge valve is opened, and the third air inlet valve and the second air outlet valve are opened alternately with the second air inlet valve and the third air outlet valve; or The second purge valve is opened, and the first air inlet valve and the third air outlet valve are opened alternately with the third air inlet valve and the first air outlet valve.

8. The multi-tank thermal storage incineration system according to claim 7, characterized in that: Also includes: chimney; The chimney is connected to the exhaust gas collecting fan and the exhaust gas collecting tank respectively.

9. A control method comprising the multi-tank regenerative incineration device and the system thereof according to any one of claims 1 to 8, characterized in that: The steps include: Turning on the purge fan; Preset first start and stop times of the first air inlet valve, the first air outlet valve, the first purge valve, the second air inlet valve, the second air outlet valve, the second purge valve, the third air inlet valve, the third air outlet valve, and the third purge valve; The waste gas collecting valve obtains the treated waste gas.

10. The control method according to claim 9, characterized in that: The following steps are also included: Turning on the heater and the exhaust gas collecting fan; Preset second start and stop times for the first air inlet valve, the first air outlet valve, the first purge valve, the second air inlet valve, the second air outlet valve, the second purge valve, the third air inlet valve, the third air outlet valve, and the third purge valve; The heater bakes the first heat storage tank, the second heat storage tank, and the third heat storage tank in sequence.

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