Air stopping and material guiding device for pyrolysis channel

Abstract

The invention provides an air stopping and material guiding device for a pyrolysis channel. The air stopping and material guiding device comprises a spiral ring pipe, a set of spherical valve openings, a set of steel balls and a set of guide ball groove plates, wherein an inner ring face of the spiral ring pipe is a cylindrical surface and an outer ring is a polygonal column surface; the spherical valve openings are respectively separated on the minimum radial section of a variable section of the spiral ring pipe at intervals in a radial direction; the steel balls are correspondingly arranged at the rear sides of the spherical valve openings which rotate along the rear side of a rotary direction of a barrel one by one; the guide ball groove plates and the outer ring surface are combined to form a ball groove for limiting the steel balls to move among the spherical valve openings, and a polygonal angular point; the polygonal angular point is outward deviated from enveloping circles of the spherical valve openings; and the quantity of the spherical valve openings in the spiral ring pipe needs to guarantee that at least one spherical valve opening is sealed by the steel ball at any moment; the device is applied to a air stopping and material guiding condition in a high-temperature pyrolysis process when a heat carrier is led in and led out of the pyrolysis channel; oxygen-enriched gas is effectively prevented from entering the pyrolysis channel, and a flow returning phenomenon that materials in the spiral pipe rotate along the pyrolysis channel can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and is mainly used in the heat carrier import and export pyrolysis channel in the high-temperature pyrolysis process of garbage; it can also be used in other working conditions of gas-blocking and material-conducting heat carrier between the inner and outer cylinders of the double-cylinder pyrolysis rotary kiln. Background technique [0002] The current pyrolysis process mostly adopts the continuous rotary solid heat carrier method. The process is usually: the heat carrier enters the anaerobic rotary pyrolysis channel and mixes with the material to be pyrolyzed. When the pyrolysis temperature is reached, the polymer chain is cracked into Low-molecular hydrocarbons are discharged and collected as combustible gas products. After pyrolysis, the carbon-like substances are discharged from the pyrolysis channel together with the heat carrier and enter the oxygen-rich return heat channe...

AI Technical Summary

Problems solved by technology

This process has high thermal efficiency, but when the heat carrier is introduced into and exported from the anaerobic rotary pyrolysis channel, it is required to block the gas path and not return the material. The current spiral pipe sealing technology is difficult to completely block the gas path and prevent the spiral The backflow in the tube during the other half of the rotation becomes the bottleneck of the continuous rotary solid heat carrier method pyrolysis technology

Images