A system and method for waste pyrolysis with adjustable oil, gas and charcoal

Abstract

The invention relates to a waste pyrolysis system with adjustable oil, gas and carbon and a method. The system comprises a pre-reaction section, a main reactor, a conditioner and a particle separator. The front of the pre-reaction section is connected to a feeder and the tail of the pre-reaction section is connected to the main reactor. The conditioner is connected after the main reactor. The particle separator is connected after the conditioner. In specific, waste having a water content not more than 60% is fed into the pre-reaction section through the feeder, reacted waste is fed to the main reactor, residue coke generated after the reaction is finished is fed into the conditioner and a generated volatile material is discharged in a forced manner into the conditioner to be contacted, reacted and conditioned with the residue coke at the same time. The conditioner achieves conditioning of the residue coke and the volatile material at the same time. The volatile material after being conditioned is fed into the particle separator to output a clean volatile material. The residue coke after conditioning has a calorific value of 3.37-6.74 MJ / kg, and can be used as building raw materials or is conveyed to a sanitary landfill. The working temperature of the pre-reaction section is 105-298 DEG C and an inert gas or flue gas is fed into the pre-reaction section. The working temperature of the main reactor is 450-650 DEG C. The working temperature of the conditioner is 700-900 DEG C. The system and the method can obtain oil with better quality and more combustible gases and are adapt to changes of the water content of the waste.

Description

technical field [0001] The invention belongs to the field of waste resource treatment. Specifically, the present invention relates to a system and method for waste pyrolysis with adjustable oil, gas and charcoal. Background technique [0002] At present, the amount of urban and rural garbage generated in my country is increasing. Existing waste disposal technologies include incineration, landfill composting, and anaerobic fermentation methods, among which only incineration methods can achieve volume reduction to the greatest extent. However, due to strong public opposition to the potential secondary pollution caused by incineration, it is currently difficult to construct incineration projects. Other heat treatment technologies include gasification and pyrolysis, which are similar to incineration and have obvious volume reduction effects (over 70% to 80% volume reduction), but the gas produced by gasification has a low calorific value and high purification requirements. Int...

AI Technical Summary

Problems solved by technology

However, the existing technology can neither effectively control the quality of the three products of oil, gas, and charcoal (that is, residual coke) at a certain pyrolysis temperature, that is, under the condition of a fixed pyrolysis temperature; Conditions to improve the quality of the recovered oil, such as the application of the invention "a pyrolysis gasification device for polymer waste (CN201320126288)" uses a catalyst to improve the quality of the oil, but the catalyst life and regeneration involved are important issues, not only affecting Economy, also affects the continuity and stability of operation

When the pyrolysis temperature is changed, the output and quality of oil, gas, and charcoal are linked according to a certain rule, and cannot be adjusted according to needs. The calorific value in charcoal is transferred to oil or gas. The invention patent "High and Low Temperature Coupling Pyrolysis Method for Sludge or Organic Garbage" (CN200910198391) provides a way to send partially carbonized materials produced by low temperature cracking in the first step into A system and method for carbonizing in a medium-temperature carbonization furnace, and further sending a mixture of part of the medium-temperature carbonized material and other wastes into a high-temperature pyrolysis furnace for gasification to obtain various solid carbonization products and gas, but the system and method cannot produce high quality oil

[0003] In view of the fact that the existing pyrolysis technology and system cannot meet the requirements of adjusting product quality economically and efficiently, in order to realize the adjustable quality of oil, gas and charcoal more economically, safely and efficiently; the present invention proposes an efficient, economical and scalable Steady operation, catalyst-free waste pyrolysis system and method to ensure recovery of high-quality oil and gas from different wastes, while charcoal remains low in calorific value, but can still be used as a raw material for building materials

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