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A process for microwave pyrolysis of waste tires to keep the cavity clean

A technology for maintaining cavities and waste tires, applied in chemical/physical/physicochemical processes of applied energy, petroleum industry, preparation of liquid hydrocarbon mixtures, etc., can solve problems such as interruption of operation, damage to microwave devices, breakdown, etc., and achieve reduction Pollution, guaranteed clean effect

Active Publication Date: 2019-12-27
SICHUAN HOT PULSE MICROWAVE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the problem that the condensable pyrolysis oil vapor and other polluting gases produced by pyrolysis of existing microwave pyrolysis waste tires are easy to diffuse into the microwave feeder and microwave transmission system, condense and gather, form coke pollution devices, and cause discharge Breakdown, interruption of operation, or even damage to the microwave device, a process for maintaining clean operation in the chamber for microwave cracking of waste tires is provided. discharge, minimize the pollution of the cracking unit, and ensure the cleanliness and effective operation of the unit

Method used

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  • A process for microwave pyrolysis of waste tires to keep the cavity clean
  • A process for microwave pyrolysis of waste tires to keep the cavity clean
  • A process for microwave pyrolysis of waste tires to keep the cavity clean

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. A process for maintaining clean operation in the chamber for microwave pyrolysis of waste tires, comprising the following steps

[0041] A. Preparation before operation: Before starting operation, pass in the medium gas to discharge the oxygen in the system, and make the system pressure to normal pressure;

[0042] B. Microwave cracking: After starting to operate, the material is input into the microwave cracking chamber from the horizontal direction through the material conveying device and the material is located in the lower part of the microwave cracking chamber for microwave cracking. At the same time, the air inlet channel opened from the upper part of the microwave cracking chamber passes Entering the medium gas makes the medium gas move to the lower part of the cracking chamber, and drives the cracking mixed gas generated by cracking to pass through the material and exit the cracking chamber from the gas outlet opened at the bottom of the cracking chamber.

...

Embodiment 2

[0046] This embodiment is carried out with reference to Example 1, the difference is that the medium gas of this embodiment can be a single N 2 , hydrocarbon gas, CO, CO 2 、H 2 , It is also possible to use a mixture of two or more of the above-mentioned gases.

[0047] In this embodiment, the temperature of the medium gas is further limited, and the temperature of the medium gas is 350°C.

[0048] In this embodiment, in step B, the relationship between the medium gas and the cracked mixed gas generated by the cracking is defined. In this embodiment, the amount of the medium gas that passes into the cracking chamber per unit time is the cracked mixed gas produced. 1 times of that, the speed of the medium gas passing through the material in the modular cracking chamber is 0.1m / s.

Embodiment 3

[0050] The difference between this embodiment and embodiment 2 is that: the temperature of the medium gas is 700°C, the amount of the medium gas per unit time passed into the cracking chamber is 50 times the amount of the cracking mixed gas produced, and the medium gas is in the modular cracking chamber The speed of the material passing through the medium is 5m / s.

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Abstract

Provided is a process for maintaining cleanness and running of a cavity during microwave cracking of waste tires, comprising the following steps: A, preparation before running: to meet the reaction conditions of cracking, before starting running, charging medium gas into a cracking cavity at normal pressure; B, cleanness and running during microwave cracking: after starting running, conveying a material into a microwave cracking cavity by a material conveying device in a horizontal direction, and performing microwave cracking on the material at the lower part of the microwave cracking cavity; in addition, introducing the medium gas from an air inlet passage formed at the upper part of the microwave cracking cavity, causing the introduced medium gas to move toward the lower part of the microwave cracking cavity, driving cracking mixed gas generated by cracking to pass through the material, and discharging the gas out of the cracking cavity from an air outlet passage formed at the bottom part of the cracking cavity. The process has the advantages that condensable cracking oil steam and other pollution gases generated by cracking are effectively discharged, the pollutions in a cracking device are reduced to the greatest extent, and the cleanness and effective running of the device are ensured.

Description

technical field [0001] The invention relates to the technical field of pyrolysis of waste tires, in particular to a process for microwave pyrolysis of waste tires to keep the chamber clean. Background technique [0002] With the increase of vehicles, a large amount of waste tires that are difficult to be naturally degraded will be produced and become black garbage, which will not only cause environmental pollution, but also a huge waste of resources. Waste tire pyrolysis is a commonly used waste tire resource recovery technology; it is a technology that heats waste tires under anaerobic conditions to crack them into pyrolysis oil, pyrolysis gas, carbon black, steel wire and other products. Rotary kiln pyrolysis, hot air pyrolysis, etc. are relatively common waste tire pyrolysis technologies at present, but these technologies heat waste tires from the outside to the inside through contact heat transfer and rely on the heat conduction of the waste tire itself, and the waste ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/12C10B53/07C10G1/10
CPCB01J19/126B01J2219/00033B01J2219/1218B01J2219/1239B01J2219/1242C10B53/07C10G1/10Y02P20/143
Inventor 周昆游俊刘毅刘洪超康琪
Owner SICHUAN HOT PULSE MICROWAVE SCI & TECH CO LTD
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