Desulfurizing method for regenerated rubber

Abstract

The invention provides a desulfurizing method for improving quality of regenerated rubber. The desulfurizing method is characterized in that the waste rubber powder is sequentially fed at uniform speed, and sequentially passes by a preheating area, a heating area, a first heat insulation area, a second heat insulation area, a first cooling area and a second cooling area; the preheating area and the heating area are heated in an infrared way, the temperature of the preheating area is lower than the temperature of the heating area, and the temperatures of the first heat insulation area, the second heat insulation area, the first cooling area and the second cooling area are gradually lowered; the lengths of the preheating area, the heating area, the first heat insulation area and the second heat insulation area are the same, the material flowing speeds of the first heat insulation area and the second heat insulation area are obviously lower than the material flowing speeds of the preheating area and the heating area, and the material flowing speed of the heating area is lower than the material flowing speed of the preheating area. The desulfurizing method has the beneficial effects that the material feeding amount and the material feeding speed are controlled; by firstly preheating and then heating, the coking phenomenon of the rubber particles caused by sudden rise of temperature is avoided, the spaces of the first heat insulation and the second heat insulation area are larger, a sufficient expansion space is provided for the rubber powder, and the quality of the regenerated rubber is improved.

Description

technical field [0001] The invention relates to the field of regenerated rubber, in particular to a desulfurization method for regenerated rubber. Background technique [0002] The disposal of waste rubber is one of the serious problems that people face today. In order to meet the ever-increasing requirements for material performance, rubber is developing towards high strength, wear resistance, stability and aging resistance, but at the same time it has caused the problem that the discarded rubber cannot be degraded naturally for a long time, and a large amount of waste rubber has caused a higher rate than plastics. Pollution (white pollution) is more difficult to deal with black pollution. On the other hand, precious rubber resources are wasted. Millions of tons of waste rubber are produced every year in the world, and how to effectively deal with such a huge amount has become a common concern of the whole society. For this reason, in addition to incinerating piles of wa...

AI Technical Summary

Problems solved by technology

[0005] 1. The heating temperature setting of the desulfurization pipeline is unreasonable, and each section of the desulfurization pipeline is heating, which not only wastes electric energy, but also does not give enough time for the rubber powder to react;

[0006] 2. The temperature of the desulfurization pipeline is set from high to low, and the highest temperature in the heating process is used for heating at the beginning. Due to the slow heat conduction of rubber, coking occurs in the waste rubber powder during heating and transportation, which affects the quality of the final product;

[0007] 3. When the waste rubber powder is conveyed in the desulfurization pipeline, the speed is uniform from the beginning to the end, and the time and amount of conveying the waste rubber powder do not match the processing requirements;

[0008] 4. Direct feeding after mixing, unable to effectively control the feeding speed, making the product unstable;

[0009] 5. The cooling method is unreasonable. Adding water to the rubber powder at 240 degrees Celsius for cooling will cause the produced recycled rubber to fail to meet the requirements.

Images