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Apparatus for pyrolyzing solid wastes through molten salt, and method thereof

A solid waste and molten salt technology, applied in the direction of solid waste removal, etc., can solve the problems of no proposed molten salt regeneration and reuse method, high equipment requirements, and high reaction temperature, and achieve rapid and efficient decomposition, high thermal conductivity, The effect of increasing the decomposition rate

Active Publication Date: 2015-03-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention patent with the publication number CN 102389888 A provides an experiment and method for gasifying waste circuit board powder using carbonate molten salt, which realizes resource separation and recovery, but the reaction temperature of molten salt is relatively high, which is 900-1000 ℃, high requirements on equipment and large reaction energy consumption, and no regeneration and recycling method of molten salt is proposed. The invention patents of CN 101905234 B and CN 1289653 A also have the above defects

Method used

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  • Apparatus for pyrolyzing solid wastes through molten salt, and method thereof
  • Apparatus for pyrolyzing solid wastes through molten salt, and method thereof

Examples

Experimental program
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Effect test

Embodiment

[0015] Recycling resources of waste circuit boards by pyrolysis of KOH-NaOH mixed molten salt

[0016] Open the material retrieving heat preservation door 1 and the reactor sealing cover 6, use the crane 7 to lower the molten salt reaction pool 4 containing 200g 40wt.%NaOH-60wt.%KOH eutectic salt to the lower end of the reaction chamber, and use electric heating to melt the molten salt The salt reaction tank is heated to 500°C and then kept at a constant temperature. The molten salt is in a liquid state, and a small amount of nitrogen gas is introduced to maintain an inert atmosphere. A crane is used to transfer the pyrolysis basket 5 containing 20g of waste circuit boards from the upper end to the upper end of the molten salt reaction tank 4, and close The reactor sealing cover and the air inlet are connected to the volatile matter outlet 9, the volatile matter reformer 10, the condenser 12, the pyrolysis oil collection tank 11 and the gas storage tank 13, check that the airti...

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Abstract

The invention belongs to the technical field of solid waste treatment and resource recovery, and relates to an apparatus for pyrolyzing solid wastes through molten salt, and a method thereof. The method uses the molten salt as a pyrolysis medium, the solid wastes are immersed in the molten salt and are effectively dissociated and decomposed under preset pyrolysis conditions, and various resource substances can be recovered. Pyrolysis products of organic components in the solid wastes are recycled as energy and resource substances. The method has the advantages of short process flow and simple operation. The apparatus allows the above raw material to be sent into or moved out of a molten salt reactor through a pyrolysis basket, and comprises a gas inlet, a gas outlet, and a feeding and discharging gate. The method uses the high heat accumulation capability and high heat conduction rate of the molten salt, effectively improves the decomposition rate of organic matters and the energy utilization rate, traps or converts acidic gases and harmful substances by using the characteristic of reaction of the molten salt with the acidic gases and the harmful substances, reduces secondary pollution to environment, and improves the cleanliness and resource of products.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource recovery, and relates to a molten salt pyrolysis solid waste device and a method thereof. Background technique [0002] Solid waste is huge, polluting, and contains a lot of resources and energy, so it needs to be properly treated and recycled. Heat treatment technology is commonly used in solid waste treatment and recycling technologies, such as waste incineration, waste pyrolysis, etc. Among them, pyrolysis technology is considered to be a promising solid waste treatment and recovery technology due to its advantages of less flue gas generation and high energy resource recovery rate. Pyrolysis is a thermochemical process in which organic matter is heated under air-isolated conditions to decompose and transform it into useful fuels or chemical raw materials. This method can be used for various solid wastes such as plastics, rubber, medical waste, and electronic waste. ...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 李爱民赵龙张雷高宁博
Owner DALIAN UNIV OF TECH
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