Waste carbon recycling method and system

Abstract

The invention relates to a waste carbon recycling method and system. A waste pretreatment device in the system is formed by sequentially connecting a bag breaking mechanism, a roller screen mechanism, a separation mechanism and a crushing mechanism; a rotating bed pyrolysis furnace is composed of a drying area, a first pyrolytic reaction area, a second pyrolytic reaction area and a third pyrolytic reaction area, the top of each area is provided with a high-temperature pyrolysis oil and gas outlet, and a radiant tube of each area is provided with a fuel gas inlet and a combustion gas outlet; the front end of the drying area is provided with a waste raw material inlet, and the tail ends of the three pyrolytic reaction areas are provided with discharging openings of pyrolytic carbon; a CO2 capturing device is formed by sequentially connecting an absorption tower, a rich liquid, a desorption tower, a reboiler, a gas-liquid separator, a barren liquor pump and a barren liquor cooler, and a first inlet of the absorption tower is connected with the combustion gas outlet; a feeding opening of a crusher is connected with a discharging opening of pyrolytic carbon; an inlet of a gasifier is connected with an outlet of the gas-liquid separator, and a feeding opening of pyrolytic carbon of the gasifier is connected with an outlet of a carbon storage tank of the crusher. By means of the waste carbon recycling method and system, it is beneficial to energy conservation and emission reduction, and economic benefits of living waste pyrolysis treatment are raised.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, and relates to a method and system for waste charcoal resource recovery. Background technique [0002] As our country is facing the double pressure of environment and energy, with the acceleration of economic and urbanization, the national energy consumption is huge. At the same time, 2 / 3 of the big cities are facing the dilemma of garbage siege. Through technical means, domestic garbage can be turned into usable resources. To a certain extent, it can alleviate my country's energy and environmental crisis. Domestic waste pyrolysis technology is more and more favored by people because of its high resource utilization rate and low environmental pollution. [0003] The main products of domestic waste pyrolysis are as follows: part of the pyrolysis oil can be used as fuel oil after refining; the pyrolysis gas that can be used as fuel gas includes some low molecular hydrocarbons...

AI Technical Summary

Problems solved by technology

[0009] This invention decomposes domestic and organic solid waste into combustible gas and carbon residue under the condition of heating and oxygen-free, the combustible gas is directly incinerated, and the exhaust gas is purified and discharged, which does not solve the problem of CO 2 The problem of high emissions

In addition, this invention uses the garbage charcoal produced by the pyrolysis of domestic garbage as the final product. Due to the low calorific value of the garbage charcoal, the market is not smooth, and it contains toxic and harmful substances such as heavy metals. If the garbage charcoal is used as the final product, the economic benefit is relatively low Poor, technical promotion is difficult

[0010] In summary, the prior art does not convert the CO produced in the domestic waste pyrolysis process 2 As a gasification agent, garbage charcoal is used as a gasification raw material to realize the recycling of garbage charcoal while meeting the requirements of CO 2 internal recycling

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