A silicone sealant production waste recycling device
By designing a device for recycling and utilizing waste materials from the production of silicone sealant, and using equipment such as crushers, reaction vessels, and gas-solid separators to separate and recycle the waste materials, the problem of ineffective utilization of waste materials has been solved, achieving efficient resource recycling and environmental protection.
Patent Information
- Application Number
- CN202521026518.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-05-23
AI Technical Summary
In the existing technology, the waste generated during the production of silicone sealants cannot be effectively recycled, resulting in resource waste and environmental pollution.
A recycling device was designed, which includes a solid waste adhesive recycling system and a liquid waste adhesive recycling system. The device uses equipment such as crusher, reaction vessel, gas-solid separator, condenser and thin film evaporator to separate and recycle waste materials, so as to realize the regeneration and utilization of filler and silicone oil.
It has achieved a comprehensive recycling rate of over 85% for waste materials, reduced raw material costs by over 30%, avoided hazardous waste disposal costs, and protected environmental safety.
Smart Images
Figure CN224672655U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical production equipment technology, specifically relating to a device for recycling and utilizing waste materials from the production of silicone sealant. Background Technology
[0002] Silicone sealant is made primarily from polydimethylsiloxane, supplemented with crosslinking agents, fillers, plasticizers, coupling agents, and catalysts, mixed under vacuum. During production, due to production reasons (high temperatures are generated during production, and the boiling point of liquids decreases under vacuum) and product quality considerations, some waste is generated. This waste includes solid waste adhesive, liquid waste adhesive, and some cleaning waste liquid. Among them, solid waste adhesive mainly consists of crosslinked silicone rubber and fillers, liquid waste adhesive mainly consists of uncured silicone oil and solvents, and cleaning waste liquid mainly consists of solvents (toluene / acetone) and adhesive particles. If these wastes can be recycled and reused, it will greatly eliminate the waste caused by direct discharge and protect environmental safety. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a device for recycling and utilizing waste materials from the production of silicone sealant, which overcomes the defects in the prior art, can recycle and utilize the waste materials generated in the production process, ensures environmental safety, and improves economic efficiency.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0005] A device for recycling waste from silicone sealant production includes a solid waste adhesive recycling system and a liquid waste adhesive recycling system (an uncured paste waste adhesive recycling system and a liquid additive recycling system). The solid waste adhesive recycling system includes a crusher, a reaction vessel, a gas-solid separator, a condenser, and a silicone oil collection tank, which are connected in sequence via pipes and valves. The liquid waste adhesive recycling system includes a filter and a thin-film evaporator, which are connected in sequence via pipes, valves, and a pump. The thin-film evaporator has a liquid outlet and a gas outlet. The liquid outlet is connected to a silicone oil distillation vessel via a pipe, and the gas outlet is connected to a solvent condensation and recovery tank via a pipe.
[0006] Preferably, the crusher is a twin-shaft crusher. The blades are made of SKD11 steel and the crushing particle size is less than 10 mm.
[0007] Preferably, the reactor is a pyrolysis reactor equipped with a nitrogen protection device.
[0008] Preferably, the gas-solid separator is a cyclone separator; the gas-solid separator has a solid material outlet and a gas outlet, the solid material outlet is connected to a packing recovery tank through a pipe and a valve; the gas outlet is connected to a condenser through a pipe and a valve, the gas outlet of the condenser is connected to a tail gas treatment device through a pipe, and the liquid outlet of the condenser is connected to a silicone oil collection tank through a pipe and a valve.
[0009] Furthermore, the packing recovery tank is also connected to the packing activation reactor. After surface treatment (silane coupling agent spraying) to restore the activity of the packing, it is collected in the regenerated packing collection tank for continued use.
[0010] Preferably, the filter is a bag filter; the solid material outlet of the filter is connected to a particle recovery tank, which is connected to a crusher; the liquid material outlet of the filter is connected to a thin-film evaporator.
[0011] Preferably, the gas outlet of the silicone oil distillation kettle is connected to a condenser via a pipeline, and then to a silicone oil collection tank; the bottom of the silicone oil distillation kettle is provided with a waste residue outlet, through which the waste residue is discharged into the waste residue collection tank. The solvent condensation and recovery tank is a recovery tank with a condensation jacket. The solvent condensation and recovery tank is also provided with a gas outlet, through which uncondensed gas is connected to a tail gas treatment device for treatment.
[0012] Preferably, the reactor is also connected to an infrared spectrometer to detect the degree of material degradation.
[0013] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0014] This invention separates and recycles solid waste adhesive using a crusher, reaction vessel, gas-solid separator, condenser, and silicone oil collection tank to obtain filler and silicone oil. The filler can be reused after activation, and the silicone oil can replace some of the new silicone oil. Liquid waste adhesive (including washing solvents) can be separated using a filter, thin-film evaporator, and solvent condensation and recovery tank. The resulting solid particles are transported to a solid waste adhesive recycling system for reuse, while the liquid passes through a thin-film evaporator to separate the solvent and silicone oil. This allows for complete recycling of the waste material. Through this process, a comprehensive waste adhesive recovery rate of ≥85% can be achieved, reducing raw material costs by more than 30% and avoiding hazardous waste disposal costs.
[0015] Therefore, this utility model can recycle and reuse waste generated in production, ensuring environmental safety and improving economic efficiency. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;
[0017] The components include: 1. Crusher; 2. Reactor; 3. Gas-solid separator; 4. Condenser; 5. Silicon oil collection tank; 6. Filter; 7. Thin-film evaporator; 8. Silicon oil distillation kettle; 9. Solvent condensation and recovery tank; 10. Packing material recovery tank; 11. Packing material activation reactor; 12. Tail gas treatment device; and 13. Colloidal particle recovery tank. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] like Figure 1 As shown, the silicone sealant production waste recycling device includes a solid waste adhesive recycling system (not labeled) and a liquid waste adhesive recycling system (not labeled). The solid waste adhesive recycling system includes a crusher 1, a reaction vessel 2, a gas-solid separator 3, a condenser 4, and a silicone oil collection tank 5, which are connected in sequence through pipes (not labeled) and valves (not labeled). The liquid waste adhesive recycling system includes a filter 6 and a thin-film evaporator 7, which are connected in sequence through pipes, valves, and a pump. The thin-film evaporator 7 is provided with a liquid outlet (not labeled) and a gas outlet (not labeled). The liquid outlet of the thin-film evaporator 7 is connected to a silicone oil distillation vessel 8 through a pipe, and the gas outlet of the thin-film evaporator 7 is connected to a solvent condensation and recovery tank 9 through a pipe.
[0020] The gas-solid separator 3 is equipped with a solid material outlet (not marked) and a gas outlet (not marked). The solid material outlet is connected to the packing recovery tank 10 through a pipe and a valve. The packing recovery tank 10 is also connected to the packing activation reactor 11. The gas outlet is connected to the condenser 4 through a pipe and a valve. The gas outlet of the condenser 4 is connected to the tail gas treatment device 12 through a pipe. The liquid outlet of the condenser 4 is connected to the silicone oil collection tank 5 through a pipe and a valve.
[0021] The liquid outlet of filter 6 is connected to the thin film evaporator 7; the solid outlet of filter 6 is connected to the granule recovery tank 13, and the granule recovery tank 13 is connected to the crusher 1.
[0022] The gas outlet of the silicone oil distillation kettle 8 is connected to the condenser 4 via a pipeline, and the liquid outlet of the condenser 4 is connected to the silicone oil collection tank 5.
[0023] In actual production, solid waste rubber is fed into crusher 1 and crushed into particles with a diameter of less than 10 mm. Then it is fed into reactor 2 and pyrolyzed at high temperature (around 350°C) under nitrogen protection. The pyrolyzed material is then separated into gaseous silicone oil and filler by gas-solid separator 3. The filler is fed into filler recovery tank 10 and then passed through filler activation reactor 11 to obtain activated filler, which can be reused. The gaseous silicone oil is condensed by condenser 4 and then enters silicone oil collection tank 5 to wait for reuse.
[0024] Liquid waste adhesive (including solvent after washing) is conveyed to filter 6 for filtration. The filter residue, mainly solid waste adhesive, is conveyed to crusher 1 in the solid waste adhesive recycling system for further processing. The liquid material is conveyed to thin-film evaporator 7 to evaporate the solvent, which then enters solvent condensation and recovery tank 9 for cooling and recovery, awaiting reuse. The remaining liquid silicone oil is conveyed to silicone oil distillation kettle 8, where the silicone oil vapor enters condenser 4 for condensation and then enters silicone oil collection tank 5 for reuse. Waste residue is collected in waste residue collection tank and awaits discharge. The waste gas generated during the process is treated uniformly by the waste gas treatment system before being discharged.
[0025] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
Claims
1. A device for recycling waste materials from silicone sealant production, characterized in that: The system includes a solid waste adhesive recycling system and a liquid waste adhesive recycling system. The solid waste adhesive recycling system includes a crusher, a reaction vessel, a gas-solid separator, a condenser, and a silicone oil collection tank, which are connected in sequence via pipes and valves. The liquid waste adhesive recycling system includes a filter and a thin-film evaporator, which are connected in sequence via pipes, valves, and a pump. The thin-film evaporator has a liquid outlet and a gas outlet. The liquid outlet is connected to a silicone oil distillation vessel via a pipe, and the gas outlet is connected to a solvent condensation and recovery tank via a pipe.
2. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The crusher is a twin-shaft crusher.
3. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The reactor is a pyrolysis reactor and is equipped with a nitrogen protection device.
4. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The gas-solid separator is a cyclone separator; the gas-solid separator has a solid material outlet and a gas outlet, the solid material outlet is connected to the packing recovery tank through a pipe and a valve; the gas outlet is connected to the condenser through a pipe and a valve, the gas outlet of the condenser is connected to the tail gas treatment device through a pipe, and the liquid outlet of the condenser is connected to the silicone oil collection tank through a pipe and a valve.
5. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The filter is a bag filter; the solid material outlet of the filter is connected to a particle recovery tank, which is connected to a crusher; the liquid material outlet of the filter is connected to a thin-film evaporator.
6. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The gas outlet of the silicone oil distillation kettle is connected to the condenser via a pipeline, and then to the silicone oil collection tank.
7. The device for recycling and utilizing waste materials from silicone sealant production as described in claim 1, characterized in that: The reactor is also connected to an infrared spectrometer.