Papermaking dry tail gas recycling device

Abstract

The utility model relates to a papermaking drying tail gas recycling device, which belongs to the technical field of papermaking and comprises a bottom plate, a gas storage tank is fixed at the left end of the upper surface of the bottom plate, a drying chamber is fixed in the middle of the upper surface of the bottom plate, a fixed box is fixed at the right end of the upper surface of the bottom plate, and two filter layers are arranged at the top of an inner cavity of the fixed box. Disassembly and assembly mechanisms used for conveniently replacing the filter layer are arranged on the tops of the opposite sides of the left side wall and the right side wall of an inner cavity of the fixing box correspondingly, and a condensation collection mechanism used for condensing high-temperature water vapor in tail gas is arranged on the left side wall of the inner cavity of the fixing box. According to the papermaking dry tail gas cyclic utilization device, a worker can conveniently disassemble and replace two filter layers regularly through the arranged disassembly and assembly mechanism, so that the two filter layers can be prevented from being blocked, the tail gas filtering efficiency and the tail gas filtering effect are improved, sucked tail gas can be condensed through a condensation plate, and the cyclic utilization effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of papermaking technology, specifically to a papermaking drying exhaust gas recycling device. Background Technology

[0002] With the continuous development of society, my country has increasingly strict requirements for industrial waste gas emissions. Many enterprises need to upgrade and renovate their original waste gas treatment equipment. In the paper production process, the drying section of the drying room dries the paper. During the drying process, a large amount of high-temperature exhaust gas is generated. This exhaust gas is rich in water vapor and some malodorous particulate matter. It is usually discharged after treatment without being recycled, which easily leads to resource waste.

[0003] A search revealed Chinese Patent Publication No. CN216092781 U, which discloses a papermaking drying exhaust gas recycling device. The device includes a drying chamber, a treatment box, and a water storage frame. A base is installed at the bottom of the drying chamber, and the treatment box is installed at the top of the base. A fan is installed on one inner wall of the treatment box, and an exhaust pipe is installed at the top of the treatment box. Cotton blocks are installed inside the exhaust pipe, and a purification tank is installed at one end of the exhaust pipe. A connecting pipe is installed through one inner wall of the drying chamber. This invention utilizes the treatment box, fan, exhaust pipe, and purification tank. The fan draws the exhaust gas into the treatment box, and then the pressure valve is opened, allowing the gas to be recycled under pressure. The exhaust gas enters the purification chamber, where it is purified by the fiber filter and activated carbon filter. The purified exhaust gas is then transported to the storage tank through a delivery pipe. The gas in the storage tank then enters the drying chamber through the inlet pipe, thus achieving the purpose of exhaust gas recycling. However, in this invention, the activated carbon filter and fiber filter are located inside the purification chamber. During use, the filter elements gradually become clogged, and staff cannot remove and replace them in time. As a result, the purification effect of the two types of filters on the exhaust gas decreases after repeated use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a paper drying exhaust gas recycling device, which has advantages such as easy filter replacement. It solves the problem that activated carbon and fiber filters are located in the inner cavity of the purification tank, and the filters will gradually become clogged during use. Moreover, the staff cannot remove and replace the activated carbon and fiber filters in the purification tank in time, resulting in a decrease in the purification effect of the two types of filters on the exhaust gas after repeated use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a paper drying exhaust gas recycling device, comprising a base plate, a gas storage tank fixed to the left end of the upper surface of the base plate, a drying chamber fixed to the middle of the upper surface of the base plate, a fixing box fixed to the right end of the upper surface of the base plate, two filter layers provided at the top of the inner cavity of the fixing box, and disassembly and assembly mechanisms for easy replacement of filter layers provided at the top of the opposite side of the left and right side walls of the inner cavity of the fixing box, and a condensation collection mechanism for condensing high-temperature water vapor in the exhaust gas provided on the left side wall of the inner cavity of the fixing box;

[0006] The disassembly and assembly mechanism includes mounting blocks fixed to the top of opposite sides of the left and right side walls of the inner cavity of the fixed box. A fixing groove is provided on the front of the mounting block. Connecting rods are fixed at both ends of the top and bottom sides of the fixing groove. A connecting plate is fixed between opposite sides of the left and right side walls of the inner cavity of the fixing groove. Movable plates are provided at the top and bottom of the outer surfaces of the two connecting rods. Through holes are provided at both ends of the upper surface of the movable plate. A return spring is fixed between the movable plate and the side of the connecting plate. The right side of the movable plate passes through the mounting block and extends to the opposite side of the two mounting blocks and is fixed with a limiting plate. A locking block is fixed on the opposite side of the two limiting plates.

[0007] Furthermore, an air outlet pipe is connected to the right side of the air storage tank, and a first pneumatic check valve is fixed to the right side of the air outlet pipe. The first pneumatic check valve is fixed to the left side of the drying chamber and communicates with its inner cavity. An air guide pipe is connected to the inner cavity of the fixed box, and a second pneumatic check valve is fixed to the other end of the air guide pipe. The other end of the second pneumatic check valve is communicated with the inner cavity of the air storage tank.

[0008] Furthermore, an air vent is provided on the upper surface of the drying chamber, an air guide hood is fixed on the upper surface of the drying chamber, a blower is fixed on the left side of the fixed box, an air inlet pipe is connected to the air inlet end of the blower, and the other end of the air inlet pipe is connected to the inner cavity of the air guide hood.

[0009] Furthermore, the cross-sectional shape of the mounting block is inverted U-shaped, and the two movable plates move linearly up and down on the outer surfaces of the two connecting rods.

[0010] Furthermore, a lever is fixed to the front of the two movable plates, and the front of the lever extends to the front side of the fixing groove. The left and right ends of the two filter layers on opposite sides are provided with slots that are adapted to the size of the card block.

[0011] Furthermore, the condensation collection mechanism includes a condensation plate fixed to the left side wall of the inner cavity of the fixed box, a water tank fixed to the bottom inner wall of the fixed box, a water level sensor fixed to the left side wall of the inner cavity of the water tank, a water pump fixed to the bottom right side of the fixed box, an inlet pipe connected to the inlet end of the water pump, the other end of the inlet pipe penetrating the right side wall of the inner cavity of the fixed box and extending into the inner cavity of the water tank, and L-shaped blocks fixed to the top of opposite sides of the left and right side walls of the inner cavity of the water tank, with filter plates placed on the upper surfaces of the two L-shaped blocks.

[0012] Furthermore, a limiting block is fixed on the upper surface of the L-shaped block, and limiting grooves adapted to the size of the limiting block are opened at both ends of the lower surface of the filter plate.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The paper drying exhaust gas recycling device is equipped with a disassembly and assembly mechanism that allows staff to regularly disassemble and replace the two filter layers, thereby preventing the two filter layers from clogging, improving the filtration efficiency and effect of the exhaust gas, and ensuring that the drawn-in exhaust gas is condensed by the condenser plate, thus improving the recycling effect.

[0015] 2. In this paper drying exhaust gas recycling device, when the collected condensate water level is detected by the water level detector, the water pump can be started by the controller, and then the condensate water in the water tank cavity can be extracted and recycled through the water inlet pipe. The whole process adopts an automated design to ensure that the condensate water can be extracted in time, thereby reducing the labor intensity of the staff. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly and assembly mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the external structure of the mounting block of this utility model;

[0019] Figure 4 This is a schematic diagram of the condensation collection mechanism of this utility model.

[0020] In the diagram: 1. Base plate, 2. Gas storage tank, 3. Drying chamber, 4. Fixed box, 5. Filter layer, 6. Disassembly and assembly mechanism, 601. Mounting block, 602. Fixed groove, 603. Connecting rod, 604. Connecting plate, 605. Movable plate, 606. Through hole, 607. Return spring, 608. Limiting plate, 609. Locking block, 7. Condensation collection mechanism, 701. Condensation plate, 702. Water tank, 703. Water level sensor, 704. Water pump, 705. Inlet pipe, 706. L-shaped block, 707. Filter plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 The paper drying exhaust gas recycling device in this embodiment includes a base plate 1, a gas storage tank 2 fixed to the left end of the upper surface of the base plate 1, a drying chamber 3 fixed to the middle of the upper surface of the base plate 1, and a fixing box 4 fixed to the right end of the upper surface of the base plate 1. The top of the inner cavity of the fixing box 4 is provided with two filter layers 5. The top of the opposite side of the left and right side walls of the inner cavity of the fixing box 4 are provided with a disassembly and assembly mechanism 6 for easy replacement of the filter layers 5. The left side wall of the inner cavity of the fixing box 4 is provided with a condensation collection mechanism 7 for condensing high-temperature water vapor in the exhaust gas.

[0023] Among them, the right side of the air storage tank 2 is connected to the air outlet pipe, and the right side of the air outlet pipe is fixed with a No. 1 pneumatic one-way valve. The No. 1 pneumatic one-way valve is fixed to the left side of the drying chamber 3 and is connected to its inner cavity. The inner cavity of the fixed box 4 is connected to the air guide pipe, and the other end of the air guide pipe is fixed with a No. 2 pneumatic one-way valve. The other end of the No. 2 pneumatic one-way valve is connected to the inner cavity of the air storage tank 2.

[0024] In this embodiment, an air outlet is provided on the upper surface of the drying chamber 3, an air guide cover is fixed on the upper surface of the drying chamber 3, a blower is fixed on the left side of the fixed box 4, an air inlet pipe is connected to the air inlet end of the blower, and the other end of the air inlet pipe is connected to the inner cavity of the air guide cover.

[0025] Understandably, opening the No. 1 pneumatic check valve allows the gas in the gas storage tank 2 to be transported to the inner cavity of the drying chamber 3, thereby drying the paper in the drying chamber 3. During drying, the blower can be started, and the exhaust gas generated by the blower can be drawn into the inner cavity of the fixed box 4 through the air inlet pipe and the air guide hood. The exhaust gas can be guided by the condenser plate 701 into the top of the inner cavity of the fixed box 4, and then, after being filtered by two filter layers 5, it enters the inner cavity of the air guide pipe and finally enters the inner cavity of the gas storage tank 2 again through the No. 2 pneumatic check valve.

[0026] It should be noted that the front of the fixed box 4 is provided with a door for replacing the filter layer 5. The two filter layers 5 are an activated carbon filter and a fiber filter, respectively. The air outlet of the blower passes through the fixed box 4 and extends into the inner cavity of the fixed box 4 and is located on the lower surface of the condenser plate 701.

[0027] Please see Figures 2 to 3To replace the filter layer 5, the disassembly and assembly mechanism 6 in this embodiment includes mounting blocks 601 fixed to the top of opposite sides of the left and right side walls of the inner cavity of the fixing box 4. Guide holes are provided on opposite sides of the two mounting blocks 601. A limiting plate 608 moves linearly up and down within the cavity of the guide holes. A fixing groove 602 is provided on the front of the mounting block 601. Connecting rods 603 are fixed at both ends between the opposite sides of the top and bottom walls of the fixing groove 602. A connecting plate 604 is fixed between the opposite sides of the left and right side walls of the inner cavity of the fixing groove 602. The top of the outer surface of the two connecting rods 603... Both the top and bottom are provided with movable plates 605. The upper surface of the movable plates 605 has through holes 606 at both ends. A return spring 607 is fixed between the movable plates 605 and the opposite side of the connecting plate 604. The two movable plates 605 move relative to each other on the outer surface of the two connecting rods 603. The relative movement of the two movable plates 605 can compress and shorten the return spring 607. The right side of the movable plate 605 passes through the mounting block 601 and extends to the opposite side of the two mounting blocks 601 and is fixed with a limit plate 608. A locking block 609 is fixed on the opposite side of the two limit plates 608.

[0028] The mounting block 601 has an inverted U-shaped cross-section. Two movable plates 605 move linearly up and down on the outer surfaces of the two connecting rods 603. A lever is fixed on the front of the two movable plates 605, and the front of the lever extends to the front of the fixing groove 602. The left and right ends of the two filter layers 5 on opposite sides are provided with slots that match the size of the locking block 609. The movement of the movable plate 605 drives the limiting plate 608 and the locking block 609 to move until the locking block 609 moves out of the inner cavity of the slot, which can release the limiting of the filter layer 5. Then the filter layer 5 can be moved out of the inner cavity of the two mounting blocks 601 for replacement.

[0029] In this embodiment, the disassembly and assembly mechanism 6 facilitates the regular disassembly and replacement of the two filter layers 5 by the staff, thereby preventing the two filter layers 5 from becoming clogged and improving the filtration efficiency and effect of the exhaust gas.

[0030] Please see Figure 4To improve the efficiency of exhaust gas recycling, the condensation collection mechanism 7 in this embodiment includes a condenser plate 701 fixed to the left side wall of the inner cavity of the fixed box 4. The exhaust gas is sprayed onto the lower surface of the condenser plate 701, and the high-temperature water vapor in the exhaust gas can be condensed by the condenser plate 701. A water tank 702 is fixed to the inner bottom wall of the fixed box 4, and a water level sensor 703 is fixed to the left side wall of the inner cavity of the water tank 702. A water pump 704 is fixed to the bottom right side of the fixed box 4. The water inlet end of the water pump 704 is connected to a water inlet pipe 705, and the other end of the water inlet pipe 705 penetrates through the inner cavity of the fixed box 4. The right side wall of the cavity extends into the inner cavity of the water tank 702. The filtered condensate can be collected in the inner cavity of the water tank 702. When the water level of the collected condensate is detected by the water level sensor 703, the water pump 704 can be started by the controller. Then, the condensate in the inner cavity of the water tank 702 can be extracted and recycled through the water inlet pipe 705. L-shaped blocks 706 are fixed on the top of the opposite side of the left and right side walls of the inner cavity of the water tank 702. Filter plates 707 are placed on the upper surface of the two L-shaped blocks 706, so that the condensed water can drip onto the upper surface of the filter plates 707 for filtration.

[0031] Among them, the upper surface of the L-shaped block 706 is fixed with a limiting block, and the left and right ends of the lower surface of the filter plate 707 are provided with limiting grooves that are adapted to the size of the limiting block. The limiting block and the limiting groove can position the filter plate 707.

[0032] It should be noted that the entire process is designed to be automated, ensuring that condensate can be extracted in a timely manner, thereby reducing the labor intensity of the staff.

[0033] The working principle of the above embodiments is as follows:

[0034] (1) When replacing the filter layer 5, first open the door of the fixed box 4, then make the two levers move relative to each other, thereby driving the two movable plates 605 to move relative to each other on the outer surface of the two connecting rods 603. The relative movement of the two movable plates 605 can compress and shorten the return spring 607. The movement of the movable plates 605 drives the limiting plate 608 and the locking block 609 to move until the locking block 609 moves out of the inner cavity of the slot, which can release the limiting of the filter layer 5. Then, the filter layer 5 can be moved out of the inner cavity of the two mounting blocks 601 to replace it.

[0035] (2) Open the No. 1 pneumatic check valve to deliver the gas in the gas storage tank 2 to the inner cavity of the drying chamber 3, thereby drying the paper in the drying chamber 3. During drying, the blower can be started, and the exhaust gas generated by the blower can be drawn into the inner cavity of the fixed box 4 through the air inlet pipe and the air guide hood. At this time, the exhaust gas is sprayed onto the lower surface of the condenser plate 701, and the high-temperature water vapor in the exhaust gas can be condensed by the condenser plate 701, so that the condensed water can drip onto the upper surface of the filter plate 707. After filtration, the exhaust gas can enter the top of the inner cavity of the fixed box 4 through the guide of the condenser plate 701, and then enter the inner cavity of the air guide pipe after being filtered by two filter layers 5. Finally, it enters the inner cavity of the air storage tank 2 again through the second pneumatic one-way valve. The filtered condensate can be collected in the inner cavity of the water tank 702. When the water level of the collected condensate is detected by the water level sensor 703, the water pump 704 can be started by the controller, and then the condensate in the inner cavity of the water tank 702 can be extracted and recycled through the water inlet pipe 705.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A paper drying exhaust gas recycling device, comprising a base plate (1), characterized in that: A gas storage tank (2) is fixed to the left end of the upper surface of the base plate (1), a drying chamber (3) is fixed to the middle of the upper surface of the base plate (1), a fixed box (4) is fixed to the right end of the upper surface of the base plate (1), two filter layers (5) are provided at the top of the inner cavity of the fixed box (4), and a disassembly and assembly mechanism (6) for easy replacement of the filter layer (5) is provided on the top of the opposite side of the left and right side walls of the inner cavity of the fixed box (4), and a condensation collection mechanism (7) for condensing high-temperature water vapor in the exhaust gas is provided on the left side wall of the inner cavity of the fixed box (4). The disassembly and assembly mechanism (6) includes a mounting block (601) fixed to the top of the opposite side of the left and right side walls of the inner cavity of the fixed box (4). The mounting block (601) has a fixing groove (602) on its front side. The top and bottom sides of the fixing groove (602) are fixed with connecting rods (603). A connecting plate (604) is fixed between the opposite sides of the left and right side walls of the inner cavity of the fixing groove (602). Movable plates (605) are provided on the top and bottom of the outer surfaces of the two connecting rods (603). Through holes (606) are provided on the left and right sides of the upper surface of the movable plate (605). A return spring (607) is fixed between the movable plate (605) and the opposite side of the connecting plate (604).

2. The paper drying tail gas recycling device according to claim 1, characterized in that: The right side of the movable plate (605) passes through the mounting block (601) and extends to the opposite side of the two mounting blocks (601) and is fixed with a limiting plate (608). Each of the two limiting plates (608) has a locking block (609) fixed on its opposite side.

3. The papermaking drying exhaust gas recycling device according to claim 1, characterized in that: The right side of the gas storage tank (2) is connected to an air outlet pipe, and a pneumatic one-way valve is fixed on the right side of the air outlet pipe. The pneumatic one-way valve is fixed to the left side of the drying chamber (3) and is connected to its inner cavity.

4. The paper drying tail gas recycling device according to claim 1, characterized in that: The inner cavity of the fixed box (4) is connected to an air guide pipe, and the other end of the air guide pipe is fixed with a No. 2 pneumatic one-way valve. The other end of the No. 2 pneumatic one-way valve is connected to the inner cavity of the air storage tank (2).

5. The paper drying tail gas recycling device according to claim 1, characterized in that: The upper surface of the drying chamber (3) is provided with an air outlet. An air guide cover is fixed on the upper surface of the drying chamber (3). A blower is fixed on the left side of the fixed box (4). The air inlet end of the blower is connected to an air inlet pipe. The other end of the air inlet pipe is connected to the inner cavity of the air guide cover.

6. The paper drying tail gas recycling device according to claim 1, characterized in that: The mounting block (601) has an inverted U-shaped cross-section, and the two movable plates (605) move linearly up and down on the outer surfaces of the two connecting rods (603).

7. The papermaking drying exhaust gas recycling device according to claim 2, characterized in that: The front of the two movable plates (605) is fixed with a lever plate, the front of the lever plate extends to the front side of the fixing groove (602), and the left and right ends of the two filter layers (5) on opposite sides are provided with a slot that matches the size of the card block (609).

8. The papermaking drying exhaust gas recycling device according to claim 1, characterized in that: The condensation collection mechanism (7) includes a condensation plate (701) fixed to the left side wall of the inner cavity of the fixed box (4), a water tank (702) fixed to the bottom wall of the inner cavity of the fixed box (4), a water level sensor (703) fixed to the left side wall of the inner cavity of the water tank (702), a water pump (704) fixed to the bottom of the right side of the fixed box (4), a water inlet pipe (705) connected to the water inlet end of the water pump (704), and the other end of the water inlet pipe (705) penetrating the right side wall of the inner cavity of the fixed box (4) and extending to the inner cavity of the water tank (702).

9. A papermaking drying exhaust gas recycling device according to claim 8, characterized in that: L-shaped blocks (706) are fixed to the top of the opposite side of the left and right side walls of the inner cavity of the water tank (702), and filter plates (707) are placed on the upper surface of the two L-shaped blocks (706).

10. A papermaking drying exhaust gas recycling device according to claim 9, characterized in that: The upper surface of the L-shaped block (706) is fixed with a limiting block, and the left and right ends of the lower surface of the filter plate (707) are provided with limiting grooves that are adapted to the size of the limiting block.

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