A system for treating norbornene off-gas

Abstract

The utility model provides a kind of norbornene waste gas processing system, including absorption tower, adsorption box and exhaust cylinder communicated in turn, atomizing nozzle is set in exhaust cylinder and is connected with deodorization system, the deodorization system includes dosing stirred tank and raw drug bucket, dosing stirred tank is provided with multiple import pipe and is connected with water bucket and raw drug bucket respectively, and outlet pipe is connected with atomizing nozzle.The utility model has the beneficial effect that: by integrating deodorization system in norbornene waste gas processing system, the concentration can be reduced while effectively controlling the odor of exhaust gas. Through the independent dosing stirred tank, the special deodorizing agent from the raw drug bucket is mixed with water at high intensity and uniformity, ensuring that the active ingredients of the liquid medicine are fully dissolved and evenly distributed. The prepared liquid medicine is delivered to the atomizing nozzle at the top of the exhaust cylinder, forming a uniform mist curtain on the entire cross section of the exhaust cylinder to remove or convert the residual trace organic matter and odor molecules in the exhaust gas that can cause olfactory irritation.

Description

Technical Field

[0001] This utility model relates to the chemical industry, specifically to a treatment system for norbornene waste gas. Background Technology

[0002] Norbornene is a white solid with a pungent odor. It generates a certain amount of waste gas during chemical production, and when the odor is uncontrolled, it has a significant impact on the environment and human health. Currently, there are no patents for deodorizing norbornene exhaust gases, and the treatment processes for related compounds generally employ condensation recovery and solvent spray absorption.

[0003] Condensation is a common industrial waste gas treatment process. It uses heat exchangers to condense high-temperature gases into liquids or solids, significantly contributing to waste reduction and recovery. In the production of norbornene-related chemicals, single-stage or two-stage condensation is generally employed. Even after condensation, a small amount of norbornene remains in the gas phase; although the concentration is reduced, the odor is still strong.

[0004] Solvent absorption is also a commonly used tail gas treatment process. It involves dissolving or reacting norbornene in the gas phase to transfer it into the liquid phase. Currently, the commonly found solvent for the absorption of norbornene and related compounds is toluene. The removal rate of solvent absorption in a single stage is typically 80-90%. While condensation and solvent absorption can reduce the concentration, they still cannot solve the problem of the irritating odor in norbornene exhaust gas. Even when combined with adsorption processes such as activated carbon to achieve the required exhaust gas concentration, the odor problem remains unresolved.

[0005] Existing technologies use RTO (Regenerative Thermal Oxidizer) treatment at the end of the process, which can achieve emission standards after combustion in the RTO. Although it can achieve compliance with standards for concentration and odor treatment, the equipment cost is relatively high, and the operation and maintenance costs are also high. Utility Model Content

[0006] To address the issue of the irritating odor in norbornene exhaust gas; This utility model provides a treatment system for norbornene waste gas, including an absorption tower, an adsorption box, and an exhaust stack connected in sequence. An atomizing nozzle is installed in the exhaust stack and connected to a deodorization system. The deodorization system includes a dosing and stirring tank and a raw material tank. The dosing and stirring tank is provided with multiple inlet pipes that are respectively connected to a water tank and a raw material tank, and an outlet pipe that is connected to the atomizing nozzle.

[0007] As a preferred embodiment, the dosing tank is equipped with a high-speed mixer with a stirring speed of 150 to 200 r / min, the inlet pipe is equipped with a transfer pump, and the outlet pipe is equipped with a booster pump.

[0008] As a preferred embodiment, the absorption tower has a wire mesh demister at the top and a multi-faceted spherical packing layer in the middle, which allows the waste gas to fully contact and capture the white oil.

[0009] As a preferred embodiment, the top of the absorption tower is equipped with a vortex nozzle, and the bottom is equipped with a return pipe connected to the vortex nozzle. The return pipe is equipped with a circulation pump to circulate the bottom absorption liquid.

[0010] As a preferred embodiment, the adsorption box is filled with activated carbon and has multiple drawers for storing activated carbon inside.

[0011] As a preferred embodiment, the air inlet of the adsorption box is equipped with a primary filter to isolate solid particles and dust and protect the activated carbon.

[0012] As a preferred embodiment, the inlet and outlet pipes of the adsorption box are each equipped with differential pressure gauges for determining the blockage status.

[0013] As a preferred embodiment, the atomizing nozzles are arranged in a ring, and the booster pump pressure is 40 to 60 kPa.

[0014] The beneficial effects of this utility model are as follows: This invention integrates a deodorization system into the treatment system for norbornene exhaust gas, effectively controlling exhaust odor while reducing concentration. Using an independent dosing and stirring tank and a high-speed mixer at 150-200 rpm, the specialized deodorizing agent from the original tank is mixed with water in a high-intensity, uniform manner, ensuring the active ingredients are fully dissolved and evenly distributed, guaranteeing the stability of the deodorization effect from the source. The prepared solution is then conveyed to an atomizing nozzle at the top of the exhaust stack, where it is fully atomized into micron-sized droplets, greatly increasing its specific surface area and forming a uniform mist curtain across the entire cross-section of the exhaust stack to ultimately remove or transform residual trace organic matter and odor molecules in the exhaust gas that are prone to causing olfactory irritation. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] The numbers in the attached diagram are: 1. Absorption tower; 2. Multi-faceted spherical packing layer; 3. Vortex nozzle; 4. Wire mesh demister; 5. Circulating pump; 6. Differential pressure gauge; 7. Adsorption box; 8. Primary filter; 9. Drawer-type carbon storage box; 10. Exhaust stack; 11. Raw material tank; 12. Transfer pump; 13. High-speed mixer; 14. Dosing mixing vessel; 15. Deodorization system; 16. Booster pump; 17. Atomizing nozzle. Detailed Implementation

[0017] To illustrate the features of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further explain this utility model.

[0018] Example: Please see Figure 1 This utility model provides a treatment system for norbornene waste gas, including an absorption tower 1, an adsorption box 7 and an exhaust stack 10 connected sequentially along the waste gas treatment process.

[0019] The absorption tower 1 is a vertical tower, with a 1.5-meter-high multi-faceted spherical packing layer 2 filling the middle section to ensure sufficient contact between the waste gas and the absorbent liquid. A wire mesh demister 4 is installed at the top of the tower to remove liquid droplets entrained in the waste gas. A vortex nozzle 3 is also installed at the top of the tower, connected to the absorbent liquid storage tank at the bottom of the tower via a return pipe. A circulation pump 5 is installed on the return pipe to pressurize the industrial white oil absorbent liquid at the bottom of the tower and deliver it to the vortex nozzle 3 for spraying, forming a circulating absorption process. The waste gas enters from the bottom of the tower and comes into counter-current contact with the white oil flowing downwards, controlling the liquid-to-gas ratio at 1:5. Organic components such as norbornene in the waste gas are captured and absorbed by the white oil, with a residence time of approximately 2 seconds in the packing layer.

[0020] The adsorption box 7 is connected to the outlet of the absorption tower 1 via a pipe. A pre-filter 8 is installed at the inlet of the adsorption box 7 to remove residual solid particles and dust from the waste gas, protecting the subsequent adsorption material. Inside the adsorption box 7 are two drawer-type activated carbon boxes 9, filled with granular activated carbon for further adsorption of residual organic pollutants in the waste gas. Differential pressure gauges 6 are installed on the inlet and outlet pipes of the adsorption box 7 to monitor changes in the resistance of the activated carbon layer, thereby determining whether it is blocked or saturated.

[0021] The exhaust pipe 10 is connected to the outlet of the adsorption box 7. Inside the exhaust pipe 10, at the top, there are six atomizing nozzles 17 arranged in a ring.

[0022] The system also includes an independent deodorization system 15, used to prepare the deodorizing solution and spray it onto the exhaust stack 10. The deodorization system 15 includes a dosing and mixing vessel 14 and a raw material tank 11. The dosing and mixing vessel 14 has two inlet pipes, connected to a water tank and the raw material tank 11 respectively via a transfer pump 12. A high-speed mixer 13 with a rotation speed of 180 rpm is installed inside the dosing and mixing vessel 14 to mix the plant-based deodorizing agent and water at a volume ratio of 1:100. The outlet pipe of the dosing and mixing vessel 14 is connected to an atomizing nozzle 17 inside the exhaust stack 10 via a booster pump 16. The outlet pressure of the booster pump 16 is set to 50 kPa to ensure complete atomization of the solution.

[0023] The system's workflow is as follows: The waste gas containing norbornene, with an initial concentration of approximately 200 ppm, first enters absorption tower 1, where it is absorbed by circulating white oil to remove most of the organic components. It then enters adsorption box 7 for deep purification via activated carbon adsorption. Finally, the purified gas enters exhaust stack 10, where it comes into contact with deodorizing liquid sprayed from atomizing nozzles 17 for further odor removal before being discharged in compliance with standards. After continuous operation, the exhaust gas was tested at 12, 24, and 36 hours. The outlet VOCs concentration could be reduced to 1-3 ppm, with no obvious characteristic odor. The entire system achieves multi-stage, highly efficient purification treatment of norbornene waste gas.

[0024] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A system for treating norbornene waste gas, characterized in that, The system includes an absorption tower (1), an adsorption box (7), and an exhaust pipe (10) connected in sequence. An atomizing nozzle (17) is installed in the exhaust pipe (10) and connected to a deodorization system (15). The deodorization system (15) includes a dosing and stirring vessel (14) and a raw medicine tank (11). The dosing and stirring vessel (14) is provided with multiple inlet pipes that are connected to a water tank and a raw medicine tank (11) respectively, and an outlet pipe that is connected to the atomizing nozzle (17).

2. The treatment system for norbornene waste gas according to claim 1, characterized in that: The dosing mixing tank (14) is equipped with a high-speed mixer (13) with a stirring speed of 150 to 200 r / min, the inlet pipe is equipped with a transfer pump (12), and the outlet pipe is equipped with a booster pump (16).

3. The norbornene waste gas treatment system according to claim 1, characterized in that: The top of the absorption tower (1) has a wire mesh demister (4) and a multi-faceted spherical packing layer (2) in the middle, so that the waste gas and white oil can be fully contacted and captured.

4. The treatment system for norbornene waste gas according to claim 1, characterized in that: The top of the absorption tower (1) is equipped with a vortex nozzle (3), and the bottom is equipped with a return pipe connected to the vortex nozzle (3). The return pipe is equipped with a circulation pump (5) to circulate the bottom absorption liquid.

5. The treatment system for norbornene waste gas according to claim 1, characterized in that: The adsorption box (7) is filled with activated carbon, and multiple drawer-type carbon storage boxes (9) are set inside.

6. The norbornene waste gas treatment system according to claim 5, characterized in that: The adsorption box (7) is equipped with a primary filter (8) at the air inlet to isolate solid particles and dust and protect the activated carbon.

7. The treatment system for norbornene waste gas according to claim 1, characterized in that: The inlet and outlet pipes of the adsorption box (7) are respectively equipped with differential pressure gauges (6) for judging the blockage.

8. The treatment system for norbornene waste gas according to claim 2, characterized in that: The atomizing nozzles (17) are arranged in a ring, and the pressure of the booster pump (16) is 40 to 60 kPa.

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