Boiler exhaust gas recovery and purification device

Abstract

The utility model discloses a boiler waste gas recovery purification device in the technical field of boiler waste gas treatment, include: purification subassembly and heat recovery subassembly, the purification subassembly is used for filtering boiler waste gas, the heat recovery subassembly is used for recycling the heat of purification subassembly exhaust gas, the purification subassembly includes the storage box, the support of rotation in the storage box, a plurality of filters of detachable of setting on the support, the air inlet pipe and the exhaust pipe of intercommunication of setting on the storage box, the opening of setting on the storage box and the cover of hinged on the opening, this application sets up a plurality of filters and adopts the alternate work mode, ensures that always has the filter of available and is in working condition, even if a certain filter is blocked or replaces, and the purification system can still continue efficient operation, avoids the waste gas treatment interruption caused by maintenance.

Description

Technical Field

[0001] This utility model relates to the field of boiler exhaust gas treatment, specifically to a boiler exhaust gas recovery and purification device. Background Technology

[0002] In the process of industrial production, the exhaust gas generated by boiler combustion contains a large amount of particulate matter, harmful gases and other pollutants, and the exhaust gas contains a certain amount of heat. Therefore, the exhaust gas needs to be purified and recovered in order to achieve the goal of energy conservation and emission reduction.

[0003] Currently, common boiler exhaust gas recovery and purification devices typically employ a "filtration + heat recovery" treatment method. This involves first using a filter to intercept particulate matter and adsorb some harmful gases from the exhaust gas, and then recovering the waste heat from the exhaust gas through circulating water or a heat exchanger. Among these methods, the filter, as the core component, plays a crucial role in intercepting particulate matter and adsorbing harmful substances. However, during long-term operation, the filter will gradually become clogged due to the adsorption of a large amount of impurities, leading to a decrease in purification efficiency. Therefore, it is necessary to replace or clean the filter regularly.

[0004] Most existing purification devices use a single filter structure, meaning they only have one main filter for treating exhaust gas. When a filter needs to be replaced, the machine must be shut down and manually disassembled, replaced, or cleaned before it can be restarted. This results in a long maintenance time and reduces the equipment's efficiency in treating boiler exhaust gas. Utility Model Content

[0005] The purpose of this utility model is to provide a boiler exhaust gas recovery and purification device, which solves the problem of inconvenient filter replacement in existing recovery and purification devices.

[0006] The present invention achieves the above objectives through the following technical solution: a boiler exhaust gas recovery and purification device, comprising: a purification component and a heat recovery component, wherein the purification component is used to filter boiler exhaust gas, and the heat recovery component is used to recover the heat of the exhaust gas discharged by the purification component.

[0007] The purification assembly includes a storage box, a bracket rotatably disposed inside the storage box, several filters detachably disposed on the bracket, an air inlet pipe and an air outlet pipe connected on the storage box, an opening disposed on the storage box, and a cover plate hinged to the opening.

[0008] Preferably, the storage box has through holes on both the upper and lower side walls, the air inlet pipe is connected to the lower through hole, and the exhaust pipe is connected to the upper through hole.

[0009] Preferably, the side wall of the bracket is provided with a plurality of mounting cylinders, the filter is disposed inside the mounting cylinders, the mounting cylinders are open at the top and bottom and the upper and lower side walls of the mounting cylinders are respectively attached to the upper and lower side inner walls of the storage box.

[0010] Preferably, the filter includes a cylinder, a filter layer disposed inside the cylinder, and a partition plate located below the filter layer. The upper and lower sides of the cylinder are open, and an air inlet is provided on the inner side wall of the cylinder. The air inlet is used to connect the inner cavity of the cylinder with the lower open opening of the cylinder.

[0011] Preferably, the mounting cylinder is provided with an elastic element for supporting the cylinder body.

[0012] Preferably, the storage box includes a shell and a cover detachably connected to the shell, with the opening located on the cover.

[0013] Preferably, the intake pipe is equipped with a pressure sensor, the exhaust pipe is equipped with a flow sensor, and the storage box is equipped with a drive motor for driving the bracket to rotate.

[0014] Preferably, the heat recovery assembly includes a housing, a heat exchange tube disposed inside the housing, and a heat-conducting plate disposed on the heat exchange tube.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Rotate the bracket to move the filter, remove the used filter, and connect the unused filter to the inlet and outlet pipes for filtering and purifying exhaust gas. This allows for quick filter replacement without requiring the purification device to stop, ensuring efficient exhaust gas treatment. By setting up multiple filters and using an alternating working mode, it ensures that there is always a usable filter in operation. Even if a filter is clogged or replaced, the purification system can continue to operate efficiently, avoiding interruptions in exhaust gas treatment due to maintenance.

[0017] 2. Move the cover to open the opening, and staff can take out the used filter from inside the storage box for replacement, ensuring that the filter in use is not affected. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the boiler exhaust gas recovery and purification device of this utility model;

[0019] Figure 2 This is a cross-sectional view of the storage box of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the bracket and the mounting cylinder of this utility model;

[0021] Figure 4 This is a cross-sectional view of the connection between the mounting cylinder and the filter in this utility model.

[0022] Figure 5 This is a cross-sectional view of the heat recovery component of this utility model.

[0023] In the diagram: 1. Purification component; 11. Storage box; 111. Shell; 112. Shell cover; 12. Cover plate; 13. Air inlet pipe; 131. Pressure sensor; 14. Exhaust pipe; 141. Flow sensor; 15. Bracket; 16. Mounting cylinder; 161. Elastic element; 17. Filter; 171. Cylinder; 172. Filter layer; 173. Partition plate; 174. Air inlet; 18. Drive motor; 2. Heat recovery component; 201. Box body; 202. Heat exchange tube; 203. Heat conduction plate. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] Example 1

[0026] Please see Figure 1 A boiler exhaust gas recovery and purification device includes: a purification component 1 and a heat recovery component 2;

[0027] Please refer to Figure 1 and Figure 2 The purification component 1 includes a storage box 11, a bracket 15, several filters 17, an air inlet pipe 13, and an exhaust pipe 14. The bracket 15 is rotatably installed in the inner cavity of the storage box 11. Several filters 17 are detachably installed on the side wall of the bracket 15. The air inlet pipe 13 and the exhaust pipe 14 are respectively connected to the storage box 11. The air inlet pipe 13 and the exhaust pipe 14 correspond to the inlet and outlet of a filter 17, respectively. The end of the air inlet pipe 13 away from the storage box 11 is connected to the boiler exhaust gas emission area. The end of the exhaust pipe 14 away from the storage box 11 is connected to the heat recovery component 2. The storage box 11 has an opening through which the filters 17 inside the storage box 11 can be taken out. A cover plate 12 is hinged inside the opening to seal the opening.

[0028] It should be noted that the cover plate 12 and the storage box 11 can be connected by bolts or by a snap-fit, so that the cover plate 12 can stably cover the opening when it does not need to be moved.

[0029] Working principle: The exhaust gas discharged from the boiler enters the filter 17 through the inlet pipe 13 for filtration and purification, and then exits from the exhaust pipe 14. It is then introduced into the heat recovery component 2, where it is heated by the flowing medium before being discharged. After the filter 17 has been used for a period of time (according to the operator's judgment), the bracket 15 is rotated to move the filter 17, removing the used filter 17 and connecting the unused filter 17 to the inlet pipe 13 and the exhaust pipe 14 for filtration and purification of the exhaust gas. The cover plate 12 is moved to open the opening, allowing the operator to remove the used filter 17 from the storage box 11 for replacement.

[0030] It should be noted that the air inlet pipe 13 is equipped with a valve to control the opening and closing of the air inlet pipe 13; when rotating the bracket 15 to change the position of the filter 17, first close the valve to cut off the air inlet pipe 13 so that the boiler exhaust gas stops entering the inside of the collection box 11. After the filter 17 is adjusted, open the valve to allow the boiler exhaust gas to enter the collection box 11 again.

[0031] In this embodiment, as a further optimization, please refer to... Figure 1 and Figure 2 The storage box 11 has through holes on both the upper and lower side walls. The two through holes are on the same axis. The air inlet pipe 13 is connected to the lower through hole, and the exhaust pipe 14 is connected to the upper through hole, so that the exhaust gas enters the filter 17 from the bottom and is discharged from the top. This will prevent all the impurities in the exhaust gas from being pressed onto the filter element of the filter 17 when the filter 17 blocks them, thus reducing the pressure on the filter element of the filter 17.

[0032] In this embodiment, as a further optimization, please refer to... Figure 2 and Figure 3 The support 15 has several mounting cylinders 16 on its side wall. The filter 17 is placed inside the mounting cylinder 16. The mounting cylinder 16 is open at the top and bottom, and the upper and lower side walls of the mounting cylinder 16 are respectively attached to the upper and lower inner walls of the storage box 11. The diameter of the lower opening of the mounting cylinder 16 is smaller than the inner diameter of the mounting cylinder 16. The outer side wall of the filter 17 is attached to the inner side wall of the mounting cylinder 16. The filter 17 will not fall out when placed inside the mounting cylinder 16. The filter 17 is not connected to the mounting cylinder 16, so that the filter 17 can be easily removed from the mounting cylinder 16. Since the upper and lower side walls of the mounting cylinder 16 are attached to the upper and lower inner walls of the storage box 11, the exhaust gas inside the working filter 17 will not leak when the opening is opened, so that the exhaust gas treatment process is not affected by the replacement of the filter 17.

[0033] It should be noted that rubber gaskets are installed on the upper and lower side walls of the mounting cylinder 16 to ensure the sealing between the upper and lower side walls of the mounting cylinder 16 and the upper and lower side inner walls of the storage box 11.

[0034] In this embodiment, as a further optimization, please refer to... Figure 4 The filter 17 includes a cylinder 171, a filter layer 172 disposed inside the cylinder 171, and a baffle 173 located below the filter layer 172. The filter layer 172 refers to a filter screen and an activated carbon layer. The upper and lower sides of the cylinder 171 are open. An air inlet 174 is provided on the inner wall of the cylinder 171. The air inlet 174 has a C-shaped cross-section and is used to connect the inner cavity of the cylinder 171 with the lower open opening of the cylinder 171. Exhaust gas enters the bottom of the inner cavity of the mounting cylinder 16 from the air inlet pipe 13, then enters the bottom of the inner cavity of the cylinder 171, and then passes through the air inlet 174, bypasses the baffle 173, and enters the inner cavity of the cylinder 171. After being filtered by the filter layer 172, it is discharged. The baffle 173 is used to collect impurities falling from the filter layer 172.

[0035] In this embodiment, as a further optimization, please refer to... Figure 4 The bottom of the inner cavity of the mounting cylinder 16 is provided with an elastic element 161 (such as a spring). The top of the elastic element 161 fits against the bottom wall of the cylinder 171 to support the cylinder 171. When the cover plate 12 is moved to open the opening, the cylinder 171 below the cover plate 12 is no longer restricted. Under the action of the elastic element 161, the cylinder 171 is pushed upward, making it convenient to remove the filter 17 from the inside of the storage box 11.

[0036] In this embodiment, as a further optimization, please refer to... Figure 1 and Figure 2 The storage box 11 includes a housing 111 and a cover 112 that is detachably connected to the housing 111 (the cover 112 and the housing 111 can be connected by bolts). The cover 112 is removed from the top of the housing 111 to open the interior of the storage box 11, and the opening is located on the cover 112.

[0037] In this embodiment, as a further optimization, please refer to... Figure 1 and Figure 2The intake pipe 13 is equipped with a pressure sensor 131 (such as a gas pressure sensor), and the exhaust pipe 14 is equipped with a flow sensor 141 (such as a gas flow sensor). The storage box 11 is equipped with a drive motor 18, the output shaft of which is connected to the bracket 15 to drive the bracket 15 to rotate. The storage box 11 is also equipped with a PLC controller to receive information transmitted by the pressure sensor 131 and the flow sensor 141 and to control the operation of the drive motor 18. When the flow sensor 141 detects that the gas flow in the exhaust pipe 14 has decreased to a threshold value, and the pressure sensor 131 detects the internal air pressure of the intake pipe 13, the drive motor 18 will be activated. When the pressure increases to the threshold, the PLC controller controls the drive motor 18 to work (the PLC controller controls the drive motor 18 to rotate the bracket 15 by a fixed amount; after the filter 17 is replaced, the drive motor 18 will stop working), driving the bracket 15 to rotate, thereby achieving automatic switching of the filter 17 and ensuring the efficiency of boiler exhaust gas treatment; if only the flow sensor 141 detects a decrease in the air flow inside the exhaust pipe 14, but the pressure sensor 131 does not detect an increase in the air pressure inside the intake pipe 13 (or even a decrease in the air pressure inside the intake pipe 13), then the drive motor 18 will not rotate the bracket 15.

[0038] It should be noted that the valve on the intake pipe 13 is a solenoid valve. When the PLC controller controls the drive motor 18 to rotate with the bracket 15, it will first control the solenoid valve to close; when the drive motor 18 stops working, the PLC controller will control the solenoid valve to open.

[0039] In this embodiment, as a further optimization, please refer to... Figure 5 The heat recovery assembly 2 includes a housing 201, a heat exchange tube 202 disposed inside the housing 201, and a heat-conducting plate 203 (a metal plate, which increases the contact area with the exhaust gas and improves the heat exchange efficiency) disposed on the heat exchange tube 202. Water can be introduced into the heat exchange tube 202 to absorb heat from the exhaust gas. The housing 201 is connected to the exhaust pipe 14. The exhaust gas discharged from the exhaust pipe 14 enters the housing 201 and contacts the heat exchange tube 202 and the heat-conducting plate 203 for heat exchange. A pipe is installed on the top of the housing 201 to discharge the exhaust gas inside the housing 201 that has absorbed heat.

[0040] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A boiler exhaust gas recovery and purification device, characterized in that, include: Purification component (1) and heat recovery component (2), wherein the purification component (1) is used to filter boiler exhaust gas and the heat recovery component (2) is used to recover the heat of the exhaust gas discharged by the purification component (1); The purification component (1) includes a storage box (11), a bracket (15) rotatably disposed in the storage box (11), a plurality of filters (17) detachably disposed on the bracket (15), an air inlet pipe (13) and an exhaust pipe (14) connected on the storage box (11), an opening disposed on the storage box (11), and a cover plate (12) hinged to the opening.

2. The boiler exhaust gas recovery and purification device according to claim 1, characterized in that, The storage box (11) has through holes on both the upper and lower side walls. The air inlet pipe (13) is connected to the lower through hole, and the exhaust pipe (14) is connected to the upper through hole.

3. The boiler exhaust gas recovery and purification device according to claim 1, characterized in that, The bracket (15) has several mounting cylinders (16) on its side wall. The filter (17) is located inside the mounting cylinder (16). The mounting cylinder (16) is open at the top and bottom, and the upper and lower side walls of the mounting cylinder (16) are respectively attached to the upper and lower side inner walls of the storage box (11).

4. The boiler exhaust gas recovery and purification device according to claim 3, characterized in that, The filter (17) includes a cylinder (171), a filter layer (172) disposed inside the cylinder (171), and a partition (173) located below the filter layer (172). The upper and lower sides of the cylinder (171) are open, and an air inlet (174) is provided on the inner wall of the cylinder (171). The air inlet (174) is used to connect the inner cavity of the cylinder (171) with the lower open opening of the cylinder (171).

5. The boiler exhaust gas recovery and purification device according to claim 4, characterized in that, The mounting cylinder (16) is provided with an elastic element (161) for supporting the cylinder body (171).

6. The boiler exhaust gas recovery and purification device according to claim 1, characterized in that, The storage box (11) includes a shell (111) and a cover (112) detachably connected to the shell (111), the opening being located on the cover (112).

7. The boiler exhaust gas recovery and purification device according to claim 1, characterized in that, The intake pipe (13) is equipped with a pressure sensor (131), the exhaust pipe (14) is equipped with a flow sensor (141), and the storage box (11) is equipped with a drive motor (18) for driving the bracket (15) to rotate.

8. The boiler exhaust gas recovery and purification device according to claim 1, characterized in that, The heat recovery assembly (2) includes a housing (201), a heat exchange tube (202) disposed in the housing (201), and a heat conduction plate (203) disposed on the heat exchange tube (202).

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