Waste tire crushing and desulfurization integrated device based on supercritical carbon dioxide jet flow and application method

Abstract

The invention discloses a waste tire crushing and desulfurization integrated device based on supercritical carbon dioxide jet flow and an application method. The application method comprises the following steps of: firstly, cooling gaseous carbon dioxide to a liquid state and temporarily storing the liquid carbon dioxide in a storage tank; pumping liquid carbon dioxide by a high-pressure plunger pump and pressurizing and storing the liquid carbon dioxide in a buffer tank; heating the liquid carbon dioxide in an oil bath, and converting the liquid carbon dioxide into a supercritical state; filling a tire crushing kettle with the supercritical carbon dioxide through a side nozzle and maintaining a supercritical state confining pressure environment; and forming the supercritical carbon dioxide jet flow through a central nozzle, and finishing recycling of waste tires under certain pressure. When one-time fine crushing of rubber is finished, the supercritical carbon dioxide has high heat and mass transfer characteristics, so that the desulfurization temperature of the rubber can be reduced and the desulfurization time is shortened; efficient desulfurization of rubber powder is synchronously realized and high-activity fine rubber powder is obtained; after the rubber is crushed, tire steel wires can be completely recycled and the gaseous carbon dioxide is circularly utilized; and thewaste tire crushing and desulfurization integrated device has the technical advantages of simple process, scientific principle, safety and high efficiency, energy saving and environment protection.

Description

Technical field [0001] The invention belongs to the technical field of waste tire recycling and high-quality rubber powder production, and specifically refers to a waste tire crushing and desulfurization integrated device and method based on supercritical carbon dioxide jet. Background technique [0002] my country has the largest amount of waste tires in the world, and piles of waste tires have become the notorious "black pollution", and where to go has become a worldwide problem. Rubber powder production is the leading direction for the recycling of waste tires and is considered the first step in the recycling of waste tires. The room temperature mechanical crushing method is currently the main recycling method for waste tires, but it faces severe technical bottlenecks. On the one hand, normal temperature mechanical pulverization includes processes such as ring cutting, spinning, coarse crushing, fine crushing, magnetic separation, fiber separation, etc. The recycling process ...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of the existing technology and solve the problems faced by the recycling field of waste tires, the quality of the rubber powder obtained by primary crushing of rubber needs to be improved, the disconnection between the rubber crushing method and the desulfurization method, and the insufficient tendency of the rubber desulfurization method to destroy the cross-linked sulfur bonds, etc. Problem, the present invention proposes a waste tire crushing and desulfurization integrated device and method based on supercritical carbon dioxide jet, which mainly uses supercritical carbon dioxide fluid as the jet medium to fully pulverize the tire rubber, completely retain the tire steel wire, and in the process Give full play to the advantages of high-efficiency desulfurization assisted by supercritical carbon dioxide fluid, synchronously and directionally break the cross-linked sulfur bonds, and realize efficient desulfurization of rubber

Images