Gross rubber production system

Abstract

The invention relates to a gross rubber production system which comprises a crude rubber dehydration device, a crude rubber polymerization reaction device, a crude rubber low-molecule removal device, a crude rubber receiver, a rubber output device, an internal mixer, a hot oil circulating and heating device, a vacuum pumping device, a nitrogen gas supply device and a cooling water circulating and cooling device, wherein the hot oil circulating and heating device is communicated with the jacket of a dehydration kettle of the crude rubber dehydration device, the jacket of a reaction kettle of the crude rubber polymerization reaction device, the jacket of a low-molecule removal kettle of the crude rubber low-molecule removal device and a pipe array preheater of the crude rubber low-molecule removal device; the vacuum pumping device is communicated with the dehydration kettle of the crude rubber dehydration device, the reaction kettle of the crude rubber polymerization reaction device, the low-molecule removal kettle of the crude rubber low-molecule removal device and the tank bodies of the crude rubber receiver and rubber output device; the nitrogen gas supply device is communicated with a nitrogen gas transmission interface of the dehydration kettle and the tank bodies of the crude rubber receiver and rubber output device; and water inlet and water outlet of the cooling water circulating and cooling device are communicated with a cooling coiled pipe and a pipe array cooler of the crude rubber receiver and rubber output device.

Description

technical field [0001] The invention relates to a production system of mixed rubber. Background technique [0002] Silicone rubber has good electrical insulation, oxygen and aging resistance, light resistance and aging resistance, mildew resistance, chemical stability, etc., and is odorless and non-toxic, and can withstand high and low temperatures. It is widely used in rubber, plastics, coatings, etc. , adhesives, sealants and other polymer industries, and also play an important role in the medical field. [0003] In the preparation process of silicone rubber, dimethylcyclosiloxane is used as the main raw material, and methyl vinyl tetracycline accounting for 1 / 1000 to 4 / 1000 of dimethylcyclosiloxane is added, Under the action of catalyst, dimethyl cyclosiloxane undergoes open-chain polymerization reaction to generate high-molecular linear dimethyl polysiloxane, and methyl vinyl tetracyclic body also undergoes open-chain polymerization reaction to generate high-molecular p...

AI Technical Summary

Problems solved by technology

Ordinary low-molecular rubber removal device, due to the conversion of vacuum and positive pressure, the rubber thread is easy to adhere to the wall of the kettle, accumulating over time, forming dead glue under long-term high temperature, which will affect heat transfer and affect the effect of removing low molecular weight

Once the dead glue is formed, the system must be dismantled and washed immediately, and dismantling and washing takes time (usually 1 week) and also pollutes materials, resulting in a lot of waste and high cost

In addition, the ordinary raw rubber removal device adopts steam coil heating, and the temperature will change with the change of steam pressure. The temperature is controlled by fast and frequent adjustment valves, and the temperature fluctuation is unstable, which will affect the removal effect of low molecules. larger

[0007] After the process of removing low molecular weight, the temperature of raw rubber is generally 160~170°C. If it is not cooled, it cannot be packaged directly. It can only be discharged into metal containers first, and then packed in plastic bags and cartons after cooling. , high cost, low efficiency, easy to pollute, and troublesome for large-scale production

[0008] The mixing of raw rubber is generally produced by internal mixers. The stirring mechanism of ordinary internal mixers has a fixed speed, and the stirring paddles rotate rapidly. Due to shearing and heat generation, the temperature of the materials in the internal mixer tank continues to rise. Excessive temperature The material will be degraded, the quality will be worse, and the energy consumption will be high; in addition, the stirring shaft of the stirring mechanism is generally sealed with packing. , the outside of the packing sealing device is positive pressure, and the impurities generated by the friction of the packing are all pumped into the material in the inner cavity of the kettle, polluting the raw material

This type of internal mixer has many disadvantages such as uncontrollable temperature, frequent dismantling and cleaning, and large fluctuations in product quality.

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