A waste gas treatment device for fireproof material production

Abstract

The utility model discloses a kind of waste gas treatment devices for fireproof material production, belong to waste gas treatment technical field, including spray tower main body, further include the filter assembly for filtering absorption liquid inside spray tower main body;The bottom side of spray tower main body is equipped with waste gas inlet;The utility model is through setting two groups of filter chamber and filter screen, simple structure, it is convenient and practical, absorption liquid can be filtered, avoid impurity to cause blockage to pipeline, circulating pump, spraying device etc., and by setting screw rod and mobile seat and other structure cooperation filter box use, two groups of filter chamber can be moved between filter position and flushing position, realize to flush filter chamber and filter screen, to ensure filtering effect, and when a group of filter chamber is at flushing position, another filter chamber is just at filter position, realize flushing without shutdown, ensure the treatment efficiency of waste gas.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for the production of fireproof materials. Background Technology

[0002] Fireproof materials are functional materials that can effectively inhibit or delay the spread of flames and reduce the hazards of fire. Their core function is to buy critical time for personnel evacuation and property protection through their heat resistance, flame retardancy, or heat insulation properties. Fireproof materials generate waste gas during processing. For example, in the processing of fireproof boards (such as rock wool boards and magnesium oxide boards containing resin binders), the blanks need to be cured at high temperatures of 180-220℃. During this process, the binders (such as phenolic resin and urea-formaldehyde resin) will decompose or volatilize, releasing waste gases such as formaldehyde, phenol, and volatile organic compounds. These waste gases can pollute the environment and harm the health of operators.

[0003] Currently, spray towers are commonly used to treat the waste gas generated during the processing of fireproof materials. The working principle of a spray tower is as follows: waste gas enters from the bottom of the tower and flows upward under the action of a fan. At the same time, the absorbent liquid in the circulating water tank at the bottom of the tower is pressurized by a circulating pump and atomized into droplets by the spray device at the top of the tower and sprayed downward. The waste gas and absorbent liquid come into full counter-current contact in the packing layer, and the pollutants are transferred to the liquid absorbent liquid. Finally, the clean gas is discharged from the top of the tower. The waste gas generated during the processing of fireproof materials may be mixed with fiber dust, and the packing may be broken or fall off during airflow impact, liquid scouring, or packing loading and unloading. These impurities will mix with the absorbent liquid. After long-term use, they may cause blockage of pipelines, circulating pumps, spray devices, etc., affecting the treatment effect of waste gas. The existing technology has not solved this problem. Utility Model Content

[0004] The purpose of this invention is to provide a waste gas treatment device for the production of fireproof materials. By setting two sets of filter chambers and filter screens, the absorbent liquid can be filtered to prevent impurities from clogging pipes, circulating pumps, spray devices, etc. By setting a screw and a movable seat in conjunction with the filter box, the two sets of filter chambers and filter screens can be moved between the filtration position and the rinsing position to rinse the filter chambers and filter screens, thereby ensuring the filtration effect and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waste gas treatment device for the production of fireproof materials includes a spray tower body and a filter assembly for filtering the absorbent liquid inside the spray tower body.

[0007] A waste gas inlet is installed on one side of the bottom of the main body of the spray tower, and a waste liquid outlet is installed on the other side of the bottom of the main body of the spray tower.

[0008] The filtration assembly includes a filter box. The bottom two sides of the filter box are connected to the waste liquid outlet through two sets of water inlet pipes. The top two sides of the filter box are connected to the water inlet of the circulation pump through two sets of water outlet pipes. A flushing port and a drain port are respectively installed in the middle of the top and bottom of the filter box. A filter box is slidably installed inside the filter box. Two sets of filter chambers are symmetrically arranged inside the filter box. An inlet and an outlet are installed at the bottom and top of the filter chamber.

[0009] Preferably, an air outlet pipe is installed on the top of the spray tower body, the air outlet pipe is connected to the air inlet of the fan, and a smoke exhaust pipe is installed at the air outlet of the fan.

[0010] Preferably, the inlet pipe, outlet pipe, flushing port, and drain port are each equipped with a solenoid valve, and a filter screen is installed inside the filter chamber by screws.

[0011] Preferably, a movable seat is fixedly installed in the middle of one side of the filter box, the movable seat is installed on the surface of the lead screw, the lead screw is disposed inside the protective box, and a first movable groove is opened in the middle of one side of the filter box, the movable seat passes through the first movable groove and slides with the first movable groove.

[0012] Preferably, the two ends of the lead screw are rotatably connected to the inner walls of the two sides of the protective box, and a motor is installed on the outside of the protective box, with the output end of the motor being drivenly connected to one end of the lead screw.

[0013] Preferably, two sets of guide rods are provided on both sides of the lead screw. The guide rods are disposed inside the protective box and fixedly connected to the protective box. A guide seat is slidably installed on the surface of the guide rod. The guide seat is fixedly connected to the filter box. A second moving groove is provided on both sides of the first moving groove. The guide seat passes through the second moving groove and is slidably engaged with the second moving groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model features two sets of filter chambers and filter screens, boasting a simple and convenient structure. It filters the absorbent liquid, preventing impurities from clogging pipes, circulating pumps, and spray devices. Through the use of a lead screw and movable seat in conjunction with the filter box, the two sets of filter chambers can move between the filtration and rinsing positions, allowing for rinsing of the filter chambers and filter screens, thus ensuring filtration efficiency. Furthermore, when one filter chamber is in the rinsing position, the other is precisely in the filtration position, enabling rinsing without stopping the machine and guaranteeing efficient waste gas treatment. 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 filter component structure;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective box;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter box;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the filter box.

[0021] In the diagram: 1. Main body of the spray tower; 2. Exhaust gas inlet; 3. Waste liquid outlet; 4. Filter box; 5. Water inlet pipe; 6. Water outlet pipe; 7. Circulating pump; 8. Flushing port; 9. Sewage outlet; 10. Filter box; 11. Filter chamber; 12. Inlet; 13. Outlet; 14. Exhaust pipe; 15. Fan; 16. Smoke exhaust pipe; 17. Solenoid valve; 18. Filter screen; 19. Moving seat; 20. Lead screw; 21. Protective box; 22. First moving trough; 23. Motor; 24. Guide rod; 25. Guide seat; 26. Second moving trough. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-5 This utility model provides a technical solution:

[0024] A waste gas treatment device for fireproof material production includes a spray tower body 1. A waste gas inlet 2 is installed on one side of the bottom of the spray tower body 1, and a waste liquid outlet 3 is installed on the other side of the bottom of the spray tower body 1. An exhaust pipe 14 is installed on the top of the spray tower body 1, connecting to the air inlet of a fan 15. A smoke exhaust pipe 16 is installed at the air outlet of the fan 15. The spray tower body 1 is a vertical tower-shaped structure, internally divided into core functional areas from bottom to top. Key components work together to treat the waste gas. A liquid storage space of a certain volume is provided at the bottom of the tower body for storing absorbent liquid (configured according to the type of waste gas pollutants, such as alkaline absorbent liquid commonly used for treating organic waste gas). One side of this area is connected to the waste gas inlet 2 (for waste gas from fireproof material production). The tower has an air inlet and a waste liquid outlet 3 on the other side (used to discharge part of the saturated absorbent or to transport the absorbent to the filter assembly). A packing layer (common packings such as hollow spheres and corrugated packings) is installed above the storage area. The packing is evenly distributed in the tower, which can greatly increase the gas-liquid contact area and provide sufficient reaction space for pollutant transfer. A spray device (such as an atomizing nozzle group) is provided at the top of the tower. The spray device is connected to an external circulation pump 7 through a pipe. The circulation pump 7 can pressurize and transport the storage area or the filtered absorbent to the spray device. An air outlet pipe 14 is provided at the top of the tower. The air outlet pipe 14 is connected to the air inlet of the fan 15. The fan 15 guides the gas flow in the tower through negative pressure. Finally, the clean gas is discharged through the exhaust pipe 16 of the fan 15 outlet.

[0025] The spray tower body 1 is the core of the waste gas treatment facility, and the waste gas purification space is constructed through a vertical tower structure. The bottom liquid storage area of ​​the spray tower body 1 stores the absorbent liquid, the waste gas inlet 2 on one side introduces the waste gas produced by the fireproof material, and the waste liquid outlet 3 on the other side realizes the circulation or discharge of the absorbent liquid. The middle packing layer increases the gas-liquid contact area, and the top spray device atomizes and sprays the absorbent liquid, which comes into countercurrent contact with the rising waste gas, so that the pollutants are transferred to the absorbent liquid. The top gas outlet pipe 14, together with the fan 15, forms a negative pressure, which guides the purified gas to be discharged through the smoke exhaust pipe 16, thus achieving efficient purification and treatment of pollutants such as formaldehyde, phenol and dust in the waste gas.

[0026] It also includes a filter assembly for filtering the absorbent liquid inside the spray tower body 1. The filter assembly includes a filter box 4. The bottom two sides of the filter box 4 are connected to the waste liquid outlet 3 through two sets of water inlet pipes 5. The top two sides of the filter box 4 are connected to the water inlet of the circulating pump 7 through two sets of water outlet pipes 6. A flushing port 8 and a drain port 9 are respectively installed in the middle of the top and bottom of the filter box 4. A filter box 10 is installed inside the filter box 4 in a sealed sliding manner. An inlet 12 and a outlet 13 are installed at the bottom and top of the filter chamber 11.

[0027] The filtration system is a key structural element in ensuring the cleanliness of the absorbent liquid. The filter box 4 and its internal components filter the circulating absorbent liquid. The inlet pipes 5 on both sides of the bottom of the filter box 4 receive the absorbent liquid containing impurities from the spray tower, while the outlet pipes 6 on both sides of the top transport the filtered clean absorbent liquid to the circulating pump 7, preventing impurities from clogging the pipes and the spray device. The top flushing port 8 and the bottom drain port 9 work together to flush the filter components and remove dirt. The internally sealed sliding filter box 10 and two sets of filter chambers 11, combined with the control of the solenoid valve 17, enable alternating filtration and flushing to ensure continuous and effective filtration and maintain the stable operation of the absorbent liquid circulation system.

[0028] Solenoid valves 17 are installed on the inlet pipe 5, outlet pipe 6, flushing port 8, and drain port 9 respectively. Two sets of filter chambers 11 are symmetrically arranged inside the filter box 10. Filter screens 18 are installed inside the filter chambers 11 by screws. A movable seat 19 is fixedly installed in the middle of one side of the filter box 10. The movable seat 19 is installed on the surface of the lead screw 20, which is located inside the protective box 21. A first movable groove 22 is opened in the middle of one side of the filter box 4. The movable seat 19 passes through the first movable groove 22 and slides in cooperation with it. The two ends of the lead screw 20 are connected to... The inner walls of the two sides of the protective box 21 are rotatably connected. A motor 23 is installed on the outer side of the protective box 21. The output end of the motor 23 is connected to one end of the lead screw 20. Two sets of guide rods 24 are provided on both sides of the lead screw 20. The guide rods 24 are located inside the protective box 21 and are fixedly connected to the protective box 21. A guide seat 25 is slidably installed on the surface of the guide rod 24. The guide seat 25 is fixedly connected to the filter box 10. A second moving groove 26 is opened on both sides of the first moving groove 22. The guide seat 25 passes through the second moving groove 26 and slides with the second moving groove 26.

[0029] The core functional component for continuous filtration and online flushing is the dual-chamber design, symmetrically arranged within the filter box 10. Alternating operation ensures continuous filtration. Each filter chamber 11 has an inlet 12 at the bottom to receive the absorbent liquid, an internal filter screen 18 to trap impurities such as fiber dust and packing debris, and a top outlet 13 to discharge clean absorbent liquid. When one set of filter chambers 11 is in the filtration position, its top inlet 12 and outlet 13 are aligned and sealed with the water inlet pipe 5 and waste liquid outlet 3. The other set is in the flushing position, with its top inlet 12 and outlet 13 aligned and sealed with the drain outlet 9 and flushing outlet 8. Cleaning is completed through the flushing outlet 8 for water intake and the drain outlet 9 for sludge discharge. This dual-chamber design avoids downtime issues during single-chamber flushing and allows for regular cleaning. Maintaining the filtration effect of filter screen 18 ensures continuous and stable purification of the absorbent liquid, improving the overall waste gas treatment efficiency. The core transmission structure for driving the movement of filter box 10 is set by lead screw 20 and movable seat 19, providing power for switching working states of filter chamber 11. Lead screw 20 is installed inside protective box 21 and is driven by motor 23 to achieve forward and reverse rotation. Movable seat 19 on its surface is fixedly connected to filter box 10 and can drive filter box 10 to slide horizontally when lead screw 20 rotates. The first moving groove 22 on filter box 4 provides sliding space for movable seat 19. Together with guide rods 24 and guide seats 25 on both sides, it ensures the smoothness and accuracy of movement of filter box 10. Through the transmission of lead screw 20 and movable seat 19, the switching between the two sets of filter chambers 11 between filtration position and rinsing position can be precisely controlled to achieve non-stop rinsing and ensure filtration efficiency.

[0030] Solenoid valve 17 and motor 23 are electrically connected to the control box. The control box is a sealed rectangular box (material can be flame-retardant ABS plastic or cold-rolled steel plate, with dustproof and moisture-proof properties). Internally, the core control unit serves as the central hub, working with functional modules and wiring interfaces to achieve automated control of the filter components and related equipment. The specific structure is as follows: Core Control Unit: It contains an embedded MCU motherboard, which integrates a central processing unit (CPU), memory (for storing control programs and operating parameters), and signal processing circuitry. It is the "command center" of the control box. The motherboard has a preset control logic program, which can output commands to control the actions of each component according to a preset cycle or external feedback signals. It also has parameter modification capabilities. Interface (e.g., connecting to a host computer via buttons or a serial port on the outside of the housing to adjust parameters such as the switching interval and rinsing time of the filter chamber 11); Drive module: containing two sets of key drive circuits, one being a motor 23 drive circuit (e.g., using an L298N motor 23 drive chip), connected to the motor 23 that controls the movement of the filter box 10 via wires, receiving pulse signals output by the MCU to control the forward, reverse, and speed of the motor 23, thereby achieving precise movement of the filter box 10 (e.g., driving the filter chamber 11 to switch between the filtration position and the rinsing position); the other being a solenoid valve 17 drive circuit (composed of a relay group, with each relay corresponding to a solenoid valve 17), connected to the inlet water pipe 5 via relay contacts. The solenoid valves 17 of the water outlet pipe 6, flushing port 8, and drain port 9 are connected one by one. The MCU controls the on / off state of the relays to realize the opening and closing of each solenoid valve 17 (e.g., opening the corresponding inlet and outlet solenoid valves 17 during filtration, closing the filter end solenoid valve 17 and opening the flushing port 8 and drain port 9 solenoid valves 17 during flushing). The signal acquisition module is equipped with two signal input interfaces. One can be connected to a liquid level sensor (if added to the device, it is used to detect the liquid level in the spray tower storage area. When the liquid level is too low, it feeds back a signal to the MCU to trigger an alarm or stop the circulation pump 7). The other can be connected to a pressure sensor (installed in the water outlet pipe 6 of the filter box 4. When the filter screen 18 is blocked, causing the pipe pressure to rise abnormally, it feeds back a signal). The signal is sent to the MCU to trigger the flushing program in advance; the signal acquisition module converts the analog (or digital) signals output by the sensor into electrical signals that the MCU can recognize, realizing real-time monitoring of the device's operating status; the power module has a built-in switching power supply circuit, with the input end connected to an external 220V AC power supply via a power cord, and the output end divided into two paths: one is low-voltage DC (e.g., 5V), which powers the MCU, signal acquisition module, and relay control terminal; the other is high-voltage DC (e.g., 24V), which powers the motor 23, solenoid valve 17, and external circulation pump 7 (if control is required); the power module also has overload protection and short-circuit protection circuits, which automatically cut off the power supply when the circuit malfunctions to avoid equipment damage;Wiring and Layout: The control box has a terminal block on one side (divided into power terminals, motor terminals (23 terminals), solenoid valve terminals (17 terminals), and sensor terminals). External device wires are connected to the terminal block through the wiring holes at the bottom of the box, and then connected to the various functional modules via wires, facilitating installation and maintenance. The core MCU motherboard, driver module, and power module are fixed to the mounting bracket inside the box with screws. Wires between modules are connected using terminal plugs, resulting in a compact and neat layout that reduces signal interference.

[0031] In practical use, after moving the device to the designated location, connect the flushing port 8 to the external water source, and inject suitable absorbent liquid (such as alkaline absorbent liquid for treating organic waste gas) into the liquid storage area at the bottom of the spray tower body 1. The liquid level should overflow the waste liquid outlet 3 but not exceed the bottom of the packing layer. Then, turn on the main power supply of the device, turn on the control box switch, and set the parameters (such as the filter chamber 11 switching interval of 1-2 hours and the single flushing duration of 3-5 minutes) through the external buttons of the control box or the host computer. After starting the device, the fan 15 runs first to form a negative pressure. The waste gas from the production of fireproof materials enters the spray tower body 1 through the waste gas inlet 2 and flows upward along the tower body. At the same time, the circulation pump 7 starts to transport the absorbent liquid in the storage area to the filter assembly. At this time, the control box controls the solenoid valve 17 of the inlet pipe 5 and outlet pipe 6 corresponding to a set of filter chambers 11 in the filter assembly to open. The absorbent liquid enters the filter chamber 11 through the inlet pipe 5, and after passing through the filter screen 18 to intercept impurities such as fiber dust and packing debris, it flows back to the circulation pump 7 through the outlet pipe 6. After being atomized by the spraying device, the gas is sprayed downwards and comes into full contact with the rising exhaust gas in the packing layer in a counter-current manner. The pollutants are transferred to the absorption liquid, and the purified gas is discharged from the exhaust pipe 16 through the exhaust pipe 14 and the fan 15. When the preset filtration time is reached or the pressure sensor detects abnormal pipeline pressure (clogging of the filter screen 18), the control box automatically triggers the switching program: first, the inlet and outlet solenoid valves 17 of the current filter chamber 11 are closed, the motor 23 is started to drive the lead screw 20 to rotate, and the moving seat 19 and the filter box 10 are slid, so that the original filter chamber 11 is moved to the flushing position (its inlet 12 and outlet 13 are aligned with the flushing port 8 and the sewage outlet 9). The other set of filter chambers 11 are moved to the filtration position at the same time and the corresponding solenoid valve 17 is opened to continue filtration. Then, the solenoid valves 17 of the flushing port 8 and the sewage outlet 9 are opened to inject high-pressure clean water into the filter chamber 11 at the flushing position to flush the filter screen 18. The impurities are discharged from the sewage outlet 9 with the sewage. After the flushing is completed, the relevant solenoid valves 17 are closed, and the system waits for the next switching.

[0032] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device for the production of fireproof materials, comprising a spray tower body (1), characterized in that: It also includes a filter assembly for filtering the absorbent liquid inside the spray tower body (1); A waste gas inlet (2) is installed on one side of the bottom of the spray tower body (1), and a waste liquid outlet (3) is installed on the other side of the bottom of the spray tower body (1). The filter assembly includes a filter box (4). The bottom sides of the filter box (4) are connected to the waste liquid outlet (3) through two sets of water inlet pipes (5). The top sides of the filter box (4) are connected to the water inlet of the circulation pump (7) through two sets of water outlet pipes (6). A flushing port (8) and a drain port (9) are respectively installed in the middle of the top and bottom of the filter box (4). A filter box (10) is installed inside the filter box (4) in a sealed sliding manner. Two sets of filter chambers (11) are symmetrically arranged inside the filter box (10). An inlet (12) and a outlet (13) are installed at the bottom and top of the filter chamber (11).

2. The waste gas treatment device for fireproof material production according to claim 1, characterized in that: The top of the spray tower body (1) is equipped with an air outlet pipe (14), which is connected to the air inlet of the fan (15). The air outlet of the fan (15) is equipped with a smoke exhaust pipe (16).

3. The waste gas treatment device for fireproof material production according to claim 1, characterized in that: The inlet pipe (5), outlet pipe (6), flushing port (8) and drain port (9) are each equipped with a solenoid valve (17), and a filter screen (18) is installed inside the filter chamber (11) by screws.

4. The waste gas treatment device for fireproof material production according to claim 1, characterized in that: A movable seat (19) is fixedly installed in the middle of one side of the filter box (10). The movable seat (19) is installed on the surface of the lead screw (20). The lead screw (20) is located inside the protective box (21). A first movable groove (22) is opened in the middle of one side of the filter box (4). The movable seat (19) passes through the first movable groove (22) and slides with the first movable groove (22).

5. The waste gas treatment device for fireproof material production according to claim 4, characterized in that: The two ends of the lead screw (20) are rotatably connected to the inner walls of the two sides of the protective box (21). A motor (23) is installed on the outside of the protective box (21), and the output end of the motor (23) is connected to one end of the lead screw (20) for transmission.

6. The waste gas treatment device for fireproof material production according to claim 4, characterized in that: Two sets of guide rods (24) are provided on both sides of the lead screw (20). The guide rods (24) are located inside the protective box (21) and are fixedly connected to the protective box (21). A guide seat (25) is slidably installed on the surface of the guide rod (24). The guide seat (25) is fixedly connected to the filter box (10). A second moving groove (26) is opened on both sides of the first moving groove (22). The guide seat (25) passes through the second moving groove (26) and slides with the second moving groove (26).

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