An adhesive production exhaust gas treatment device

Abstract

The utility model discloses an adhesive production waste gas treatment equipment relates to waste gas treatment technical field, aims at solving the low purification efficiency of existing adhesive production waste gas treatment equipment, easy to cause secondary pollution and the problem of unable to realize resource recovery. The equipment includes the waste gas collection device, pretreatment device, adsorption purification device, desorption regeneration device, condensation recovery device and tail gas emission device that connect in proper order, is equipped with a plurality of groups detachable activated carbon adsorption module in adsorption purification device inside, and desorption regeneration device realizes the regeneration of activated carbon through heating component and inert gas delivery component, and condensation recovery device can carry out condensation recovery to the organic steam of desorption. The utility model discloses the reasonable structure design, not only can efficient removal organic pollutant in adhesive production waste gas, but also can realize the recycling of activated carbon and the recovery of organic component, reduce the processing cost, reduce secondary pollution, have higher practicality and popularization value.

Description

Technical Field

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

[0002] The production of adhesives generates a large amount of waste gas containing organic pollutants, typically volatile organic compounds (VOCs) such as benzene, toluene, xylene, and formaldehyde. Direct emission into the atmosphere not only causes serious environmental pollution but also harms human health. Currently, commonly used methods for treating adhesive production waste gas include combustion, adsorption, and absorption. However, existing treatment equipment has many shortcomings. Although combustion can oxidize and decompose organic pollutants, it requires a large amount of energy and may produce secondary pollutants such as nitrogen oxides. Traditional adsorption methods often use a fixed activated carbon adsorption layer. Once the adsorption is saturated, the activated carbon needs to be replaced, which not only increases the treatment cost but also easily causes solid waste pollution. The absorption method has low absorption efficiency for organic pollutants, and the absorbent needs to be replaced regularly, making subsequent treatment difficult and hindering resource recycling. Therefore, designing a waste gas treatment device for adhesive production that has high purification efficiency, enables resource recycling, and has low cost is of great practical significance. Utility Model Content

[0003] The purpose of this invention is to provide an adhesive production waste gas treatment device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adhesive production waste gas treatment device, including a waste gas collection device, a pretreatment device, an adsorption purification device, a desorption regeneration device, a condensation recovery device, and a tail gas emission device. Each device is connected in sequence through pipelines, and each pipeline is equipped with a fan and a control valve.

[0005] Preferably, the waste gas collection device includes a collection hood, a main pipe, and branch pipes. The collection hood is installed at the waste gas emission port of the adhesive production equipment. One end of the branch pipe is connected to the collection hood, and the other end is connected to the main pipe. The main pipe is connected to the pretreatment device.

[0006] Preferably, the pretreatment device includes a housing, with an exhaust gas inlet on the side of the housing, which is connected to the main pipe of the exhaust gas collection device. Inside the housing, from top to bottom, are arranged a filter layer, a spray layer, and a liquid collection tank. The filter layer is a stainless steel filter screen used to remove particulate matter from the exhaust gas. The spray layer has several spray heads, which are connected to an external reagent tank via a water pump. The reagent tank contains alkaline spray liquid used to neutralize acidic substances in the exhaust gas. The liquid collection tank has a drain outlet at the bottom, and the housing has an exhaust gas outlet at the top.

[0007] Preferably, the adsorption purification device includes an adsorption tower, inside which are arranged several sets of activated carbon adsorption modules. The activated carbon adsorption modules are connected to the inner wall of the adsorption tower via slide rails, enabling them to be disassembled and replaced. The top of the adsorption tower is provided with a second waste gas inlet, which is connected to a first waste gas outlet of the shell. The bottom is provided with a purified gas outlet, which is connected to a tail gas emission device via a pipe.

[0008] Preferably, the desorption and regeneration device includes a heating component and an inert gas conveying component. The heating component is an electric heating tube, which is installed between the activated carbon adsorption modules inside the adsorption tower for heating and desorbing the activated carbon. The inert gas conveying component includes an inert gas storage tank and a conveying pipeline. One end of the conveying pipeline is connected to the inert gas storage tank, and the other end is connected to the inert gas inlet at the bottom of the adsorption tower for conveying inert gas into the adsorption tower and carrying the organic vapor generated during desorption out from the inert gas outlet at the top of the adsorption tower.

[0009] Preferably, the condensation recovery device includes a condenser and a recovery tank. The inlet of the condenser is connected to the inert gas outlet at the top of the adsorption tower via a pipe, and the outlet of the condenser is connected to the recovery tank. The condenser adopts a shell-and-tube structure and is equipped with a cooling water pipe inside. The organic vapor is condensed and liquefied through circulating cooling water. The bottom of the recovery tank is provided with a discharge port for collecting liquid organic recyclables.

[0010] Preferably, the exhaust gas emission device includes an exhaust pipe and an online monitoring instrument. The online monitoring instrument is installed on the exhaust pipe and is used to monitor the concentration of pollutants in the exhaust gas in real time. A rain cap is provided on the top of the exhaust pipe to prevent rainwater from entering the device.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The pretreatment device removes particulate matter and acidic substances from the exhaust gas, followed by the efficient adsorption of organic pollutants by the activated carbon adsorption module. Finally, online monitoring ensures that the exhaust gas meets emission standards, resulting in high overall purification efficiency.

[0012] 2. Activated carbon can be recycled through desorption and regeneration devices, reducing the cost of replacing activated carbon; organic pollutants can be recovered through condensation and recovery devices and reused in production, reducing raw material consumption.

[0013] 3. Inert gas is used to transport organic vapor to prevent the organic vapor from mixing with air and causing an explosion; a temperature controller and online monitoring instrument are installed to realize the automated control and safety monitoring of the equipment.

[0014] 4. The activated carbon adsorption module adopts a detachable design, which is convenient for replacement and regeneration; the various devices are connected by pipes and equipped with control valves and fans to facilitate the adjustment of waste gas flow direction and speed.

[0015] 5. It avoids the secondary pollution generated by traditional combustion methods and the solid waste pollution generated by adsorption methods, thus meeting environmental protection requirements.

[0016] In summary, this utility model has a reasonable structural design, high purification efficiency, enables resource recycling, high safety, convenient operation, and is environmentally friendly and pollution-free, making it suitable for widespread use in the adhesive production industry. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the waste gas collection device of this utility model; Figure 3 This is a schematic diagram of the pretreatment device of this utility model; Figure 4 This is a schematic diagram of the adsorption purification device of this utility model; Figure 5 This is a schematic diagram of the exhaust gas emission device of this utility model.

[0018] In the diagram: 1. Waste gas collection device; 11. Collection hood; 12. Main pipeline; 13. Branch pipeline; 2. Pretreatment device; 21. Waste gas inlet 1; 22. Shell; 23. Filter layer; 24. Spray layer; 25. Spray head; 26. Liquid collection tank; 27. Drain outlet; 28. Chemical tank; 29. ​​Waste gas outlet; 3. Adsorption purification device; 31. Adsorption tower; 32. Activated carbon adsorption module; 33. Waste gas inlet 2; 34. Purified gas outlet; 4. Electric heating tube; 5. Condenser; 6. Tail gas emission device; 61. Exhaust pipe; 62. Online monitoring instrument; 63. Rain cap; 7. Fan; 8. Control valve; 9. Inert gas inlet; 10. Inert gas outlet. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-5 This utility model provides a technical solution: an adhesive production waste gas treatment device, including a waste gas collection device 1, a pretreatment device 2, an adsorption purification device 3, a desorption regeneration device, a condensation recovery device, and a tail gas emission device 6. Each device is connected in sequence through pipelines, and each pipeline is equipped with a fan 7 and a control valve 8 to control the flow direction and flow rate of the waste gas.

[0021] The waste gas collection device 1 includes a collection hood 11, a main pipe 12, and branch pipes 13. The collection hood 11 is installed at the waste gas emission port of the adhesive production equipment. The collection hood 11 adopts a funnel-shaped structure and fits tightly against the waste gas emission port of the adhesive production equipment to ensure that the waste gas can be fully collected. One end of the branch pipe 13 is connected to the collection hood 11, and the other end is connected to the main pipe 12. The main pipe 12 is connected to the pretreatment device 2. The branch pipes 13 are set according to the number of production equipment, and collect the waste gas from each emission port into the main pipe 12, and then transport it to the pretreatment device 2, effectively avoiding waste gas leakage.

[0022] The pretreatment device 2 includes a housing 22 made of corrosion-resistant stainless steel. A waste gas inlet 21 is located on the side of the housing 22, connecting to the main pipe 12 of the waste gas collection device 1. Inside the housing 22, from top to bottom, are arranged a filter layer 23, a spray layer 24, and a liquid collection tank 26. The filter layer 23 is a stainless steel filter screen, capable of filtering out dust, particulate matter, and other impurities in the waste gas, preventing clogging of subsequent devices. Furthermore, the filter layer 23 is removable and replaceable to ensure its normal operation. The spray layer 24 is equipped with several spray heads 25, which are connected to an external reagent tank 28 via a water pump. The reagent tank 28 contains an alkaline spray solution. The spray heads 25 of the spray layer 24 are evenly distributed to atomize the alkaline spray solution, such as sodium hydroxide solution, in the reagent tank 28 and spray it to fully contact the exhaust gas, neutralize acidic substances such as organic acids in the exhaust gas, and reduce the corrosiveness of the exhaust gas. The bottom of the liquid collection tank 26 is equipped with a drain port 27 for discharging waste liquid, and the top of the shell 22 is equipped with an exhaust gas outlet 29.

[0023] The adsorption purification device 3 includes an adsorption tower 31, inside which are several sets of activated carbon adsorption modules 32. The activated carbon is modified granular activated carbon, which has a large specific surface area and adsorption capacity, and can efficiently adsorb organic pollutants in waste gas. The activated carbon adsorption modules 32 are connected to the inner wall of the adsorption tower 31 via slide rails. When the activated carbon is saturated, the module can be directly extracted for replacement or regeneration, making operation convenient. The top of the adsorption tower 31 is equipped with a second waste gas inlet 33, which is connected to the first waste gas outlet 29 of the shell 22. The bottom is equipped with a purified gas outlet 34, which is connected to the tail gas emission device 6 via a pipe. The second waste gas inlet 33 at the top of the adsorption tower 31 and the purified gas outlet 34 at the bottom can adopt a cross-flow design to prolong the residence time of waste gas in the adsorption tower 31 and improve adsorption efficiency.

[0024] The desorption and regeneration device includes a heating component and an inert gas delivery component. The heating component is an electric heating tube 4, made of a high-temperature resistant alloy, which is evenly distributed among the activated carbon adsorption modules 32 inside the adsorption tower 31. The heating temperature is controlled at 80-120℃ by a temperature controller to achieve low-temperature desorption of activated carbon and prevent combustion. The inert gas delivery component includes an inert gas storage tank and a delivery pipeline. One end of the delivery pipeline is connected to the inert gas storage tank, and the other end is connected to the inert gas inlet 9 at the bottom of the adsorption tower 31. It is used to deliver inert gas, such as nitrogen, into the adsorption tower 31 and carry the organic vapor generated during desorption out through the inert gas outlet 10 at the top of the adsorption tower 31. The organic vapor generated during desorption is carried to the condensation and recovery device, while preventing the organic vapor from mixing with air and causing an explosion.

[0025] The condensation recovery device includes a condenser 5 and a recovery tank. The inlet of the condenser 5 is connected to the inert gas outlet 10 at the top of the adsorption tower 31 via a pipe, and the outlet of the condenser 5 is connected to the recovery tank. The condenser 5 adopts a shell-and-tube structure with internal cooling water pipes. Organic vapor is introduced into the shell side, and circulating cooling water is introduced into the tube side, achieving condensation and liquefaction of the organic vapor through the circulating cooling water. The condensed liquid organic matter flows into the recovery tank, which is equipped with a level gauge and a temperature sensor for real-time monitoring of the recovery process. A discharge port is located at the bottom of the recovery tank for collecting the liquid organic matter. The recovered organic matter can be reused in adhesive production, achieving resource recycling.

[0026] The exhaust gas emission device 6 includes an exhaust pipe 61 and an online monitoring instrument 62. The online monitoring instrument 62 is installed on the exhaust pipe 61. The online monitoring instrument 62 uses laser spectroscopy to monitor the concentration of VOCs in the exhaust gas in real time and transmits the monitoring data to the control system. If the concentration exceeds the standard, the control system will automatically close the valve of the exhaust pipe 61 and send the exhaust gas back to the adsorption purification device 3 for reprocessing. The top of the exhaust pipe 61 is equipped with a rain cap 63 to prevent rainwater from entering the equipment.

[0027] Specifically, the VOC-containing waste gas generated during adhesive production is collected through the collection hood 11 and branch pipes 13 and then sent to the main pipe 12. Under the negative pressure of the fan 7, it is transported to the pretreatment device 2 to prevent waste gas leakage.

[0028] After the exhaust gas enters the pretreatment device 2, it first passes through the filter screen of the filter layer 23 to remove dust and particulate impurities in the exhaust gas, and then uses alkaline spray liquid to neutralize acidic substances and reduce the corrosiveness of the exhaust gas.

[0029] The pretreated waste gas enters the adsorption tower 31, where activated carbon adsorption module 32 deeply adsorbs VOCs such as benzene and toluene, removing organic pollutants. The purified gas is monitored by online monitoring instrument 62. If the VOC concentration meets the standard, it is directly discharged; if it exceeds the standard, the gas is returned for re-adsorption until it meets the standard.

[0030] Once the activated carbon is saturated, the equipment switches to regeneration mode. The adsorption tower 31 is heated (80-120℃) by the electric heating element 4, causing VOCs to detach from the activated carbon surface. Simultaneously, an inert gas, such as nitrogen, is introduced to carry away the organic vapors generated during desorption. These organic vapors enter the condenser 5, where they are condensed into liquid organic matter by circulating cooling water. This liquid can be collected and reused in adhesive production; nitrogen drying can also facilitate reuse. After desorption is complete, the adsorption tower 31 is cooled to room temperature, and the system switches back to the waste gas purification stage to continue treating new waste gas.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas treatment device for adhesive production, characterized in that, It includes a waste gas collection device (1), a pretreatment device (2), an adsorption purification device (3), a desorption regeneration device, a condensation recovery device, and a tail gas emission device (6). Each device is connected in sequence through a pipeline, and each pipeline is equipped with a fan (7) and a control valve (8).

2. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The waste gas collection device (1) includes a collection hood (11), a main pipe (12) and a branch pipe (13). The collection hood (11) is installed at the waste gas discharge port of the adhesive production equipment. One end of the branch pipe (13) is connected to the collection hood (11), and the other end is connected to the main pipe (12). The main pipe (12) is connected to the pretreatment device (2).

3. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The pretreatment device (2) includes a shell (22), and a waste gas inlet (21) is provided on the side of the shell (22). The waste gas inlet (21) is connected to the main pipe (12) of the waste gas collection device (1). The shell (22) is provided with a filter layer (23), a spray layer (24) and a liquid collection tank (26) from top to bottom. The filter layer (23) is a stainless steel filter screen. The spray layer (24) is provided with a number of spray heads (25). The spray heads (25) are connected to an external reagent tank (28) through a water pump. The reagent tank (28) is filled with alkaline spray liquid. The bottom of the liquid collection tank (26) is provided with a drain port (27). The top of the shell (22) is provided with a waste gas outlet (29).

4. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The adsorption purification device (3) includes an adsorption tower (31), inside which are several sets of activated carbon adsorption modules (32), and the activated carbon adsorption modules (32) are connected to the inner wall of the adsorption tower (31) via slide rails; the top of the adsorption tower (31) is provided with a second waste gas inlet (33), which is connected to the first waste gas outlet (29) of the shell (22), and the bottom is provided with a purified gas outlet (34), which is connected to the exhaust gas emission device (6) via a pipe.

5. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The desorption and regeneration device includes a heating component and an inert gas conveying component. The heating component is an electric heating tube (4) which is installed between the activated carbon adsorption modules (32) inside the adsorption tower (31). The inert gas conveying component includes an inert gas storage tank and a conveying pipeline. One end of the conveying pipeline is connected to the inert gas storage tank, and the other end is connected to the inert gas inlet (9) at the bottom of the adsorption tower (31).

6. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The condensation recovery device includes a condenser (5) and a recovery tank. The inlet of the condenser (5) is connected to the inert gas outlet (10) at the top of the adsorption tower (31) through a pipe, and the outlet of the condenser (5) is connected to the recovery tank. The condenser (5) adopts a shell-and-tube structure and is equipped with a cooling water pipe inside. The bottom of the recovery tank is equipped with a discharge port.

7. The adhesive production waste gas treatment equipment according to claim 1, characterized in that: The exhaust gas emission device (6) includes an exhaust pipe (61) and an online monitoring instrument (62), the online monitoring instrument (62) being installed on the exhaust pipe (61); a rain cap (63) is provided on the top of the exhaust pipe (61).

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