Waste gas treatment device

Abstract

The utility model discloses a waste gas treatment device which comprises a washing tower; at least one spraying layer is arranged on the inner side of the washing tower; a volume box is arranged below the spraying layer, a pump body is arranged on one side of the volume box, and cleaning liquid is conveyed to the spraying layer from the interior of the volume box; an air inlet pipe is arranged in the volume box, penetrates through the volume box and extends to the inner side of the spraying layer; a demisting layer is arranged above the spraying layer, an exhaust pipe is arranged on the demisting layer, and a fan and a detection hole are arranged at the output end of the exhaust pipe; the two spraying layers are arranged, waste gas is sequentially subjected to spraying treatment, the temperature control device is arranged on one side of the spraying layers, the temperature during waste gas treatment is controlled, the filling parts are arranged at the spraying layers, the contact area between the waste gas and cleaning liquid is increased, and the waste gas treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment and recovery, in particular to a waste gas treatment device. Background Art

[0002] Urea-formaldehyde resin is a common synthetic resin. During its production process, due to the characteristics of chemical reactions, it will inevitably produce waste gases such as ammonia (NH3) and formaldehyde (HCHO), which will cause environmental pollution. Ammonia and formaldehyde are easily soluble in water. Adding a scrubber to the production equipment for waste gas treatment is a common and effective solution. The waste gas is absorbed in the scrubber, and the subsequent wastewater is treated and recycled.

[0003] However, during the use of existing scrubbing towers, it is difficult to fully contact the exhaust gas through spraying, and it is also impossible to monitor and control the absorption reaction, which affects the efficiency of exhaust gas treatment and absorption. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an exhaust gas treatment device.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an exhaust gas treatment device, comprising:

[0006] scrubbers;

[0007] At least one spray layer is provided inside the washing tower;

[0008] A volume box is provided below the spray layer, and a pump body is provided on one side of the volume box to transport the cleaning liquid from the volume box to the spray layer;

[0009] An air intake pipe is provided in the volume box, and the air intake pipe passes through the volume box and extends to the inner side of the spray layer;

[0010] A demisting layer is provided above the spraying layer, an exhaust pipe is provided on the demisting layer, and a fan and a detection hole are provided at the output end of the exhaust pipe.

[0011] As a further description of the above technical solution: a liquid level detector is provided on one side of the volume tank, a liquid discharge port and a liquid filling port are provided on one side of the pump body, and a storage barrel is provided on one side of the liquid filling port to monitor the liquid level in the volume tank.

[0012] As a further description of the above technical solution: a pH detector and an overflow port are also provided on one side of the volume box.

[0013] As a further description of the above technical solution: the spray layer is provided with two layers, a support plate is installed on the inner side of the spray layer, a filling part is provided on the support plate, and the inner side of the filling part is provided at one end of the air inlet pipe.

[0014] As a further description of the above technical solution: the filling part is a corrugated filler or a grid filler, which is stacked on the support plate during installation and is prevented from moving by a pressure cover or a fixed frame.

[0015] As a further description of the above technical solution: a spraying part is provided above the filling part, and the spraying part is connected to the pump body through a pipeline.

[0016] As a further description of the above technical solution: the spray part includes one or more spray pipes, which are evenly distributed and fixed to the pipeline by threads or buckles.

[0017] As a further description of the above technical solution: a temperature control device is provided on one side of the spray layer.

[0018] As a further description of the above technical solution: a safety valve is provided between the demisting layer and the exhaust pipe to regulate the pressure in the washing tower.

[0019] As a further description of the above technical solution: the bottom of the washing tower is fixed by bolts, and the outer side of the washing tower is welded in an integrated manner.

[0020] The above technical solution has the following advantages or beneficial effects:

[0021] By setting up two spray layers, the waste gas is sprayed in turn, a temperature control device is set on one side of the spray layer to control the temperature of the waste gas during treatment, and a filling part is set at the spray layer to increase the contact area between the waste gas and the cleaning liquid, thereby improving the efficiency of waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the exhaust gas treatment device proposed in this utility model.

[0023] Legend:

[0024] 1. Scrubber; 2. Spray layer; 3. Volume tank; 4. Pump body; 5. Air inlet pipe; 6. Demisting layer; 7. Exhaust pipe; 8. Fan; 9. Inspection hole; 10. Liquid level detector; 11. Drain port; 12. Liquid filling port; 13. Storage tank; 14. pH meter; 15. Overflow port; 16. Support plate; 17. Filling part; 18. Spray part; 19. Temperature control device; 20. Safety valve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1 The utility model provides an embodiment: an exhaust gas treatment device, comprising: a washing tower 1; at least one spray layer 2 is provided on the inside of the washing tower 1; a volume box 3 is provided below the spray layer 2, and a pump body 4 is provided on one side of the volume box 3 to transport the cleaning liquid from the volume box 3 to the spray layer 2; an air inlet pipe 5 is provided in the volume box 3, and the air inlet pipe 5 passes through the volume box 3 and extends to the inside of the spray layer 2; a demisting layer 6 is provided above the spray layer 2, and an exhaust pipe 7 is provided on the demisting layer 6, and a fan 8 and a detection hole 9 are provided at the output end of the exhaust pipe 7.

[0027] In this embodiment, the waste gas (mainly containing pollutants such as formaldehyde, ammonia, methanol, etc.) generated during the production of urea-formaldehyde resin is introduced into the washing tower 1 through a fan 8 or other waste gas collection device, and the waste gas enters the spray layer 2 from the bottom or side of the washing tower. After the waste gas enters the washing tower 1, it usually flows in a countercurrent manner, that is, the waste gas enters the tower from the bottom and rises.

[0028] The cleaning liquid in the volume box 3 is transported to the spray layer 2 for spraying through the pump body 4, and the exhaust gas is transported to the inner side of the spray layer 2 through the air inlet pipe 5, where it comes into contact with the cleaning liquid at a certain temperature for absorption treatment. The sprayed waste liquid flows back to the inner side of the volume box 3 below, and part of the water vapor is condensed and refluxed for collection in the demisting layer 6. The treated clean gas is discharged to the external environment through the exhaust pipe 7, and the discharged gas is monitored through the detection hole 9.

[0029] After the exhaust gas is treated by the scrubber 1, harmful substances in the exhaust gas have been removed by the cleaning liquid. The purified exhaust gas passes through the demisting layer 6 at the top of the scrubber 1 and is discharged from the exhaust pipe 7. If a higher treatment effect is required, the exhaust gas can also be treated by further treatment equipment (such as an activated carbon adsorption device or other subsequent treatment facilities).

[0030] Fan 8 is typically installed at the exhaust gas inlet pipe 5 or exhaust pipe 7 to introduce exhaust gas into scrubber 1 or discharge purified exhaust gas. The connection between fan 8 and scrubber 1 is typically made with flanges or bolts to ensure a tight seal between the fan and the scrubber to prevent gas leakage.

[0031] By setting two spray layers 2, the waste gas is sprayed in turn, a temperature control device 19 is set on one side of the spray layer 2 to control the temperature of the waste gas during treatment, and a filling part 17 is set at the spray layer 2 to increase the contact area between the waste gas and the cleaning liquid, thereby improving the efficiency of waste gas treatment.

[0032] A liquid level detector 10 is provided on one side of the volume tank 3, a liquid discharge port 11 and a liquid filling port 12 are provided on one side of the pump body 4, and a storage bucket 13 is provided on one side of the liquid filling port 12 to monitor the liquid level in the volume tank 3. A pH detector 14 and an overflow port 15 are also provided on one side of the volume tank 3.

[0033] In this embodiment, the cleaning fluid is typically collected in a volume tank 3 at the bottom of the scrubber tower as circulating fluid. After treatment, it can be recycled to reduce water waste. However, as the amount of harmful substances absorbed increases, the cleaning fluid gradually becomes saturated and must be regularly replaced or treated. A level meter 10 measures the volume of the cleaning fluid in the volume tank 3 to determine whether to drain or add liquid, controlling the operation of the drain port 11 or the addition port 12. A storage tank 13 stores the cleaning fluid to be used, and a pH meter 14 tests the pH of the cleaning fluid to determine whether it has reached saturation.

[0034] The spray layer 2 is provided with two layers. A support plate 16 is installed on the inner side of the spray layer 2. A filling portion 17 is provided on the support plate 16. One end of the air inlet pipe 5 is provided with the inner side of the filling portion 17.

[0035] In this embodiment, the filling portion 17 inside the washing tower 1 is typically supported by a support plate 16 or bracket. The support plate 16 is fixed to the inner wall of the washing tower 1, usually by welding or bolting to ensure that it can bear the weight of the filling portion 17 and the cleaning liquid. The filling portion 17 itself is typically bulk material (such as corrugated packing, grid packing), which is stacked on the support plate 16 during installation and prevented from moving by a gland or fixed frame. The filling portion 17 is not directly fixed to the washing tower 1, but is positioned by the support plate 16 and the frame.

[0036] The filling portion 17 is a corrugated filler or a grid filler, which is stacked on a support plate during installation and is prevented from moving by a pressure cover or a fixed frame.

[0037] In this embodiment, the washing tower 1 is usually filled with fillers (such as corrugated fillers or spherical fillers), which increase the surface area of ​​gas-liquid contact, allowing the exhaust gas and circulating liquid to contact and react more effectively, thereby improving the absorption efficiency.

[0038] A spraying portion 18 is provided above the filling portion 17 , and the spraying portion 18 is connected to the pump body 4 through a pipeline.

[0039] In this embodiment, a spraying portion 18 is installed at the top of the filling portion 17 to spray a cleaning liquid (typically water or an alkaline solution, such as sodium hydroxide solution) downward. The cleaning liquid forms fine droplets after spraying, which fully contact the rising exhaust gas. The exhaust gas and the cleaning liquid are in full gas-liquid contact within the scrubbing tower 1. The cleaning liquid absorbs harmful substances in the exhaust gas, particularly formaldehyde and ammonia, through chemical reactions or physical adsorption.

[0040] Physical absorption: The water in the cleaning fluid dissolves gaseous pollutants (such as formaldehyde) in water through dissolution.

[0041] Chemical absorption: Alkaline cleaning liquid (such as NaOH) reacts chemically with acidic gases (such as formaldehyde) in the exhaust gas to produce harmless products such as formate, thereby reducing harmful components in the exhaust gas.

[0042] The spraying portion 18 includes one or more spraying pipes, which are evenly distributed and fixed to the pipeline by threads or buckles.

[0043] The spray section 18 is usually composed of one or more spray pipes, which are fixed to the bracket inside the washing tower 1 through flanges or threads. The spray pipes evenly distribute the cleaning liquid in the tower to ensure sufficient contact between the liquid and the exhaust gas.

[0044] The connection between the pump body 4 and the spray pipe is usually made of threads or flanges to ensure that the cleaning liquid does not leak under high pressure. The connection between the pump body 4 and the washing tower 1 is also made of flanges or threads to facilitate the disassembly and maintenance of the pump body 4.

[0045] The nozzle is fixed to the spray pipe by threads or clips, which makes it easy to replace and adjust the spray angle and flow rate of the nozzle. The nozzle is usually detachable for easy cleaning or replacement.

[0046] A temperature control device 19 is provided on one side of the spray layer 2 .

[0047] In this embodiment, the temperature control device includes a temperature sensor and a heater, which are fixed to the tower body by flanges or threads. The temperature sensor is usually installed on the outer wall or inside of the tower body, connected by flanges, to monitor the temperature inside the washing tower 1 in real time.

[0048] A safety valve 20 is provided between the demisting layer 6 and the exhaust pipe 7 to regulate the pressure in the scrubbing tower 1 .

[0049] In this embodiment, the safety valve 20 is a component used to prevent excessive pressure in the scrubber 1 or other emergencies, and is typically installed at the top of the scrubber 1. The safety valve 20 is primarily connected to the scrubber 1 via a flange connection, ensuring that the safety valve can respond quickly when needed.

[0050] The bottom of the washing tower 1 is fixed by bolts, and the outside of the washing tower 1 is integrally welded.

[0051] In this embodiment, the body of the scrubber 1 is typically made of a corrosion-resistant material (such as fiberglass, stainless steel, etc.) and is mounted on a sturdy base. The base is secured to the body by welding or bolting to ensure structural stability and support the weight of the scrubber 1 and the operation of the internal equipment.

[0052] The various sections of the scrubber 1, or the connections between the tower and other components (such as the spray layer 2, filling section 17, demisting layer 6, air inlet pipe 5, and exhaust pipe 7), are typically made through flanges. Flange connections facilitate component removal and maintenance, while bolts and washers ensure a tight seal at the joints.

[0053] Parts that do not require frequent disassembly, such as the outside of the scrubber 1, may be welded to ensure a permanent, sealed connection.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An exhaust gas treatment device, characterized in that: include: Scrubber (1); At least one spray layer (2) is provided inside the washing tower (1); A volume box (3) is provided below the spray layer (2), and a pump body (4) is provided on one side of the volume box (3) to transport the cleaning liquid from the volume box (3) to the spray layer (2); An air intake pipe (5) is provided in the volume box (3), and the air intake pipe (5) passes through the volume box (3) and extends to the inner side of the spray layer (2); A demisting layer (6) is provided above the spraying layer (2), an exhaust pipe (7) is provided on the demisting layer (6), and a fan (8) and a detection hole (9) are provided at the output end of the exhaust pipe (7).

2. The exhaust gas treatment device according to claim 1, characterized in that: A liquid level detector (10) is provided on one side of the volume tank (3), a liquid discharge port (11) and a liquid filling port (12) are provided on one side of the pump body (4), and a storage barrel (13) is provided on one side of the liquid filling port (12) to monitor the liquid level in the volume tank (3).

3. The exhaust gas treatment device according to claim 1, characterized in that: A pH detector (14) and an overflow port (15) are also provided on one side of the volume box (3).

4. The exhaust gas treatment device according to claim 1, characterized in that: The spray layer (2) is provided with two layers, a support plate (16) is installed on the inner side of the spray layer (2), a filling portion (17) is provided on the support plate (16), and one end of the air inlet pipe (5) is provided with the inner side of the filling portion (17).

5. The exhaust gas treatment device according to claim 4, characterized in that: The filling part (17) is a corrugated filler or a grid filler, which is stacked on a support plate during installation and is prevented from moving by a pressure cover or a fixed frame.

6. The exhaust gas treatment device according to claim 4, characterized in that: A spraying portion (18) is provided above the filling portion (17), and the spraying portion (18) is connected to the pump body (4) through a pipeline.

7. The exhaust gas treatment device according to claim 6, characterized in that: The spraying part (18) comprises one or more spraying pipes, which are evenly distributed and fixed to the pipeline by means of threads or buckles.

8. The exhaust gas treatment device according to claim 1, characterized in that: A temperature control device (19) is provided on one side of the spray layer (2).

9. The exhaust gas treatment device according to claim 1, characterized in that: A safety valve (20) is provided between the demisting layer (6) and the exhaust pipe (7) to regulate the pressure in the washing tower (1).

10. The exhaust gas treatment device according to claim 1, characterized in that: The bottom of the washing tower (1) is fixed by bolts, and the outside of the washing tower (1) is integrally welded.

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