RTO tail gas waste heat recovery device

Abstract

The utility model relates to exhaust treatment equipment technical field especially relates to a kind of RTO tail gas waste heat recovery device, including at least two first and last connected waste heat recovery mechanism, each waste heat recovery mechanism includes shell, heat exchange component and shunt component;Heat exchange chamber and exhaust duct are equipped in the shell, the heat exchange chamber and exhaust duct do not communicate with each other, and heat exchange chamber side wall is equipped with opening, detachable heat exchange component is installed at the opening;The heat exchange component includes air pump, heat preservation box, reversing valve, circulating pump and heat exchanger;When cleaning, reversing valve controls air pump and condenser intercommunication, air pump gas makes fluid in condenser all discharge into heat preservation box, then staff only needs to disconnect the connection of condenser and reversing valve, and the whole heat exchanger can be taken down to carry out cleaning work, the heat exchanger disassembled can be completely soaked in cleaning solution, improve the cleaning efficiency of heat exchanger.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to an RTO tail gas waste heat recovery device. Background Technology

[0002] An RTO incinerator is a device that uses thermal energy to directly burn and decompose exhaust gas into carbon dioxide and water, thereby purifying the exhaust gas. It can handle high-concentration volatile organic exhaust gases. Because the exhaust gas treated by the RTO device is at a high temperature, a waste heat recovery device is usually installed after the RTO incinerator.

[0003] While existing waste heat recovery devices can recover heat from exhaust gases, some exhaust gases produce impurities such as tar after combustion, which are difficult to completely remove even with the addition of filtration devices. Furthermore, the tar in the exhaust gas easily condenses and adheres to the surface of the heat exchanger when passing through it, which will affect the heat exchange efficiency over time. The heat exchangers in existing waste heat recovery devices are usually difficult to clean, and the corresponding exhaust gas pipeline is usually closed during the cleaning process, which affects the waste heat recovery efficiency. Utility Model Content

[0004] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide an RTO exhaust gas waste heat recovery device, which aims to solve the problem that existing exhaust gas waste heat recovery devices are difficult to clean.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An RTO exhaust gas waste heat recovery device includes at least two waste heat recovery mechanisms connected end-to-end. Each waste heat recovery mechanism includes a housing, a heat exchange component, and a flow diversion component. The housing has a heat exchange chamber and an exhaust duct, which are not interconnected. The side wall of the heat exchange chamber has an opening, at which a detachable heat exchange component is installed. The heat exchange component includes an air pump, an insulation box, a reversing valve, a circulation pump, and a heat exchanger. The heat exchanger is connected to the air pump or circulation pump via the reversing valve, and the insulation box is connected to the reversing valve. The flow diversion component includes a flow diversion hood, a flow diversion plate, and a flow diversion drive component. The flow diversion hood is fixed to both ends of the housing. The flow diversion plate and the flow diversion drive component are installed inside the flow diversion hood and are drively connected. The flow diversion drive component drives the flow diversion plate to swing to a horizontal or inclined state within the flow diversion hood to switch the flow direction of the exhaust gas.

[0007] Preferably, the heat exchanger includes a sealing plate and a condenser. The sealing plate is detachably connected to the opening, the condenser is fixed inside the sealing plate, and the condenser is connected to the reversing valve through a connecting pipe that passes through the sealing plate.

[0008] Preferably, the opening is provided with a guide seat, the edge of the sealing plate is provided with a guide groove that matches the guide seat, and the outer side of the sealing plate is provided with a handle.

[0009] Preferably, the circulating pump includes a return pump and a supply pump, wherein the return pump is connected to the reversing valve and the insulation box, and the supply pump is connected to the insulation box and the reversing valve.

[0010] Preferably, the reversing valve is connected to the connecting pipe via a flexible hose, the end of which is provided with a quick-connect interface or a threaded interface, and the connecting pipe is correspondingly provided with a quick-connect interface or a threaded section.

[0011] Preferably, the exhaust duct is provided with auxiliary heat exchange fins for enhancing the heat exchange between the exhaust gas and the outside air, and the auxiliary heat exchange fins are evenly distributed.

[0012] Preferably, the flow divider is provided with a sealing strip at its edge, and the sealing strip abuts between the flow divider cover and the flow divider.

[0013] Preferably, the diversion drive is an electric push rod or a cylinder.

[0014] In summary, the beneficial effects of this utility model are as follows:

[0015] The RTO exhaust gas waste heat recovery device provided by this utility model, compared with the prior art, allows for easier disassembly and cleaning of the heat exchange chamber when the condenser needs to be cleaned. The flow divider drives the flow divider plate to separate the heat exchange chamber, making it convenient for maintenance personnel to disassemble and clean. At this time, the exhaust gas from the RTO incinerator will pass through the exhaust duct under the guidance of the flow divider plate and be recovered by the next set of waste heat recovery mechanisms. During cleaning, the reversing valve controls the air pump to connect with the condenser. The air pump supplies air to discharge all the fluid in the condenser into the insulation box. Then, the staff only needs to disconnect the condenser from the reversing valve to remove the entire heat exchanger for cleaning. The disassembled heat exchanger can be completely immersed in the cleaning solution, improving the cleaning efficiency of the heat exchanger. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention in its working state;

[0018] Figure 3 This is a cross-sectional view of the present invention in its clean state;

[0019] Figure 4 This is a three-dimensional view of the waste heat recovery mechanism in this utility model;

[0020] Figure 5 This is a cross-sectional view of the housing in this utility model;

[0021] Figure 6 This is a perspective view of the heat exchange component in this utility model;

[0022] Figure 7 This is a perspective view of the heat exchanger in this utility model;

[0023] Figure 8 This is a perspective view of the shunt component in this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Casing; 10. Heat exchange chamber; 11. Exhaust duct; 12. Opening; 13. Guide seat; 2. Heat exchange assembly; 20. Heat exchanger; 200. Condenser; 201. Sealing plate; 202. Handle; 203. Connecting pipe; 204. Guide groove; 21. Air pump; 22. Insulation box; 23. Reversing valve; 24. Return pump; 25. Supply pump; 26. Hose; 3. Diverter assembly; 30. Diverter hood; 31. Diverter drive component; 32. Diverter plate. Detailed Implementation

[0026] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0027] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0028] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0029] The following is in conjunction with the appendix Figure 1-8The present invention will provide a more detailed description of an embodiment of an RTO tail gas waste heat recovery device.

[0030] An RTO exhaust gas waste heat recovery device includes at least two waste heat recovery mechanisms connected end to end. Each waste heat recovery mechanism includes a housing 1 and a heat exchange component 2. The heat exchange component 2 is installed on the housing 1 and includes an air pump 21, an insulation box 22, a reversing valve 23, a circulation pump, and a heat exchanger 20.

[0031] The casing 1 is provided with a heat exchange chamber 10 and an exhaust duct 11. The heat exchange chamber 10 and the exhaust duct 11 are not connected to each other. An opening 12 is provided on the side wall of the heat exchange chamber 10. A detachable heat exchanger 20 is installed at the opening 12. The heat exchanger 20 is detachably connected to a reversing valve 23. The reversing valve 23 is used to connect the heat exchanger 20 to an air pump 21 or a circulating pump. The insulation box 22 is connected to the reversing valve 23.

[0032] In this embodiment, the heat exchanger 20 includes a sealing plate 201 and a condenser 200. The sealing plate 201 is detachably connected to the housing 1. The condenser 200 is fixedly installed on the side of the sealing plate 201 facing the heat exchange chamber 10. A connecting pipe 203 is provided on the condenser 200. The connecting pipe 203 passes through the sealing plate 201 and is detachably connected to the reversing valve 23.

[0033] In this embodiment, a guide seat 13 is provided at the opening 12, and a guide groove 204 corresponding to the guide seat 13 is provided on the sealing plate 201; a handle 202 is also provided on the sealing plate 201. The edge of the sealing plate 201 of the heat exchanger 20 is embedded in the guide groove 204, and can be quickly pulled out using the handle 202. The condenser 200 has a built-in spiral heat exchange tube, and the connecting pipe 203 is connected to the flexible hose 26 of the reversing valve 23 through a quick-connect interface.

[0034] Through the above design scheme, the guide seat 13 can guide the sealing plate 201 to be positioned and installed, while the handle 202 can be easily held by the staff, facilitating installation and disassembly operations.

[0035] In this embodiment, the sealing plate 201 is connected to the housing 1 by bolts. Multiple sets of bolt seats are evenly distributed on the edge of the opening 12, and the sealing plate 201 is provided with through holes corresponding to the bolt seats. A sealing gasket is also provided on the sealing plate 201 to seal the connection between the sealing plate 201 and the housing 1.

[0036] In this embodiment, the circulation pump includes a return pump 24 and a supply pump 25. The return pump 24 is mounted on the housing 1 and is connected to the reversing valve 23. The supply pump 25 is mounted on the insulation box 22 and is connected to the insulation box 22.

[0037] With the above design, the reflux pump 24 on the casing 1 is used to direct the fluid at room temperature to the condenser 200. After passing through the condenser 200, the fluid temperature rises and flows into the insulation box 22. Then, the supply pump 25 pumps the high-temperature fluid in the insulation box 22 to the required location. The insulation box 22 can temporarily store a certain amount of fluid. During the cleaning of the condenser 200, the high-temperature fluid in the insulation box 22 can continue to work under the pumping of the reflux pump 24.

[0038] With the above design scheme, during normal operation, the reversing valve 23 controls the connection direction, so that the reflux pump 24, condenser 200 and insulation box 22 are connected in sequence. The normal temperature fluid after operation flows into the condenser 200 under the pumping of the reflux pump 24. After absorbing the residual heat of the exhaust gas in the condenser 200, it becomes a high temperature fluid and flows into the insulation box 22. After long-term operation, a large amount of tar and other impurities will be attached to the surface of the condenser 200, which will reduce the heat exchange efficiency. During the cleaning operation, the reversing valve 23 switches the connection direction, connecting the air pump 21, condenser 200 and insulation box 22 in sequence. The air pump 21 continuously supplies air to the condenser 200, and the air discharges the fluid in the condenser 200 into the insulation box 22, preventing the fluid in the condenser 200 from affecting the subsequent disassembly work. After the liquid in the condenser 200 is drained, the user can remove the heat exchanger 20 from the casing 1 and immerse the entire condenser 200 in the cleaning solution to ensure that the condenser 200 is thoroughly cleaned.

[0039] In this embodiment, the waste heat recovery mechanism further includes a diversion component 3, which includes a diversion shroud 30, a diversion plate 32, and a diversion drive component 31. The diversion shroud 30 is fixedly connected to the housing 1, the diversion plate 32 is installed in the diversion shroud 30, and the diversion drive component 31 is installed on the diversion shroud 30. The diversion drive component 31 is used to drive the diversion plate 32 to swing in the diversion shroud 30, and the diversion drive component 31 is an electric push rod or a cylinder.

[0040] In this embodiment, a sealing strip is provided at the edge of the flow divider 32, and the sealing strip abuts between the flow divider shroud 30 and the flow divider 32.

[0041] In this embodiment, the housing 1 is connected to the flow divider 30, and a flow divider assembly 3 is provided at both the front and rear ends of the housing 1.

[0042] Through the above design scheme, the front and rear two-group diversion components 3 of the casing 1 can isolate the heat exchange chamber 10 from the exhaust duct 11 or allow the exhaust gas to enter. During normal operation, the diversion plates 32 on both sides block the front and rear ends of the exhaust duct 11 respectively, so that the exhaust duct 11 is in a sealed state. At this time, the exhaust gas can only pass through the heat exchange chamber 10, ensuring the normal operation of waste heat recovery. When cleaning is required, the diversion drive component 31 controls the diversion plate 32 to rotate in the diversion hood 30. The diversion plate 32 moves from the position of blocking the exhaust duct 11 to the position of blocking the heat exchange chamber 10. The two groups of diversion plates 32 block the front and rear ends of the heat exchange chamber 10 at the same time, completely isolating the heat exchange chamber 10, which is convenient for maintenance personnel to operate. At this time, the exhaust gas will pass through the exhaust duct 11 under the guidance of the diversion plate 32.

[0043] This utility model eliminates the need for additional exhaust gas emission pipes to ensure normal exhaust gas emission during maintenance, and also eliminates the need to shut off exhaust gas emission or directly discharge exhaust gas that has not undergone waste heat recovery during maintenance. Guided by the exhaust duct 11, the exhaust gas can bypass the next set of waste heat recovery mechanisms for waste heat recovery. Two or more sets of waste heat recovery mechanisms can also improve recovery efficiency and energy utilization.

[0044] It is worth mentioning that, in order to enhance the heat exchange between the exhaust gas and the outside air, auxiliary heat exchange fins (not shown in the figure) are provided in the exhaust duct 11, and the auxiliary heat exchange fins (not shown in the figure) are evenly distributed.

[0045] In this embodiment, a flexible hose 26 is connected to the reversing valve 23, and a quick-connect interface is provided at the end of the flexible hose 26 for connecting to the connecting pipe 203.

[0046] The quick-connect interface, as described above, allows for rapid connection and improves work efficiency.

[0047] This utility model also provides another embodiment, wherein the end of the hose 26 is provided with a threaded interface, and the connecting pipe 203 is provided with a threaded section corresponding to the threaded interface.

[0048] With the above design scheme, the threaded connection is more robust and reliable than the quick-connect method, and does not increase the workload excessively.

[0049] The cleaning operation process of this utility model is as follows:

[0050] Switching the exhaust gas direction: Start the flow splitter 31, push the flow splitter 32 to swing to a horizontal state, seal the inlet of the heat exchange chamber 10 with the sealing strip, and the exhaust gas enters the next mechanism through the exhaust duct 11.

[0051] Draining the heat exchange medium: The reversing valve 23 switches to the air pump 21 passage, and the air pump 21 injects compressed air into the condenser 200, pressing the residual heat transfer oil in it back into the insulation box 22.

[0052] Disassembly and cleaning: Disconnect the quick-connect interface, pull out the heat exchanger 20, and immerse it in cleaning solution to remove tar;

[0053] Resumption of operation: After reinstalling heat exchanger 20, reversing valve 23 switches to the circulating pump passage, and the heat transfer oil is recirculated.

[0054] In summary, the RTO exhaust gas waste heat recovery device provided by this utility model, compared with the prior art, allows for easier disassembly and cleaning of the heat exchange chamber 10 when the condenser 200 needs to be cleaned. The diversion drive 31 drives the diversion plate 32 to separate the heat exchange chamber 10, facilitating disassembly and cleaning by maintenance personnel. At this time, the exhaust gas from the RTO incinerator will pass through the exhaust duct 11 under the guidance of the diversion plate 32, and the next set of waste heat recovery mechanisms will perform waste heat recovery operations. During cleaning, the reversing valve 23 controls the air pump 21 to connect with the condenser 200. The air pump 21 supplies air to discharge all the fluid in the condenser 200 into the insulation box 22. Then, the operator only needs to disconnect the condenser 200 from the reversing valve 23 to remove the entire heat exchanger 20 for cleaning. The disassembled heat exchanger 20 can be completely immersed in the cleaning solution, improving the cleaning efficiency of the heat exchanger 20.

[0055] Where there is no conflict, the above embodiments and features can be combined with each other.

[0056] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waste heat recovery device for RTO exhaust gas, characterized in that, The system includes at least two waste heat recovery mechanisms connected end-to-end. Each waste heat recovery mechanism includes a housing, a heat exchange component, and a flow diversion component. The housing contains a heat exchange chamber and an exhaust duct. The heat exchange chamber and the exhaust duct are not interconnected, and the side wall of the heat exchange chamber has an opening where a detachable heat exchange component is installed. The heat exchange component includes an air pump, an insulation box, a reversing valve, a circulating pump, and a heat exchanger. The heat exchanger is connected to the air pump or the circulating pump via the reversing valve, and the insulation box is connected to the reversing valve. The flow diversion component includes a flow diversion hood, a flow diversion plate, and a flow diversion drive component. The flow diversion hood is fixed to both ends of the housing. The flow diversion plate and the flow diversion drive component are installed inside the flow diversion hood and are drively connected. The flow diversion drive component drives the flow diversion plate to swing to a horizontal or inclined state within the flow diversion hood to switch the flow direction of the exhaust gas.

2. The RTO tail gas waste heat recovery device according to claim 1, characterized in that, The heat exchanger includes a sealing plate and a condenser. The sealing plate is detachably connected to the opening. The condenser is fixed inside the sealing plate and is connected to the reversing valve through a connecting pipe that passes through the sealing plate.

3. The RTO tail gas waste heat recovery device according to claim 2, characterized in that, The opening is provided with a guide seat, the edge of the sealing plate is provided with a guide groove that matches the guide seat, and the outer side of the sealing plate is provided with a handle.

4. The RTO tail gas waste heat recovery device according to claim 3, characterized in that, The circulating pump includes a return pump and a supply pump. The return pump is connected to the reversing valve and the insulation box, and the supply pump is connected to the insulation box and the reversing valve.

5. The RTO tail gas waste heat recovery device according to claim 4, characterized in that, The reversing valve is connected to the connecting pipe via a flexible hose. The end of the flexible hose is provided with a quick-connect interface or a threaded interface, and the connecting pipe is provided with a corresponding quick-connect interface or a threaded section.

6. The RTO tail gas waste heat recovery device according to claim 5, characterized in that, The exhaust duct is equipped with auxiliary heat exchange fins to enhance the heat exchange between the exhaust gas and the outside air. The auxiliary heat exchange fins are evenly distributed.

7. The RTO tail gas waste heat recovery device according to claim 6, characterized in that, The flow divider plate is provided with a sealing strip at its edge, and the sealing strip abuts between the flow divider cover and the flow divider plate.

8. The RTO tail gas waste heat recovery device according to claim 7, characterized in that, The diversion drive component is an electric push rod or a cylinder.

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