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Chemical looping conversion recovery of non-magnetic metal oxides and co-production hydrogen system and process

A non-magnetic metal and oxide technology, applied in the direction of titanium oxide/hydroxide, oxide/hydroxide preparation, zinc oxide/zinc hydroxide, etc., can solve the problem of not being able to achieve harmless paint residue, etc. problems, to achieve significant overall economic efficiency and reduce emissions

Active Publication Date: 2022-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, neither of these two methods can well realize the harmless and resourceful treatment of paint waste

Method used

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  • Chemical looping conversion recovery of non-magnetic metal oxides and co-production hydrogen system and process
  • Chemical looping conversion recovery of non-magnetic metal oxides and co-production hydrogen system and process
  • Chemical looping conversion recovery of non-magnetic metal oxides and co-production hydrogen system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A recovery process for titanium-containing paint waste, comprising the following steps:

[0043] 1 Clean the titanium-containing paint waste residue and clean water in a certain proportion in the reaction kettle 2. At the same time, the reaction kettle 2 is connected with the centrifugal fan 1, and the exhaust gas in the titanium-containing paint waste residue is separated through the centrifugal fan. Carry out cleaning and deodorization operations.

[0044] 2. The waste titanium-containing paint slag cleaned by the reaction kettle 2 is sent to the solid-liquid separation device 10 for dehydration, and then sent to the dryer 9 for drying treatment after dehydration.

[0045] 3. The dehydrated and deodorized titanium-containing waste paint slag is sent to the mill 3 for grinding to obtain titanium-containing waste paint slag particles.

[0046] 4 Pass titanium-containing waste paint slag particles, oxygen carrier and water into the combustion reactor 4 according to the ...

Embodiment 2

[0052] A recovery process for zinc-containing paint waste, comprising the following steps:

[0053] 1 Clean the zinc-containing paint waste and clean water in a certain proportion in the reaction kettle 2. At the same time, the reaction kettle 2 is connected with the centrifugal fan 1, and the waste gas in the zinc-containing paint waste is separated through the centrifugal fan, and the zinc-containing paint waste Carry out cleaning and deodorization operations.

[0054] 2 The zinc-containing waste paint slag cleaned by the reaction kettle 2 is sent to the solid-liquid separation device 10 for dehydration, and then sent to the dryer 9 for drying treatment after dehydration.

[0055] 3. The dehydrated and deodorized zinc-containing waste paint slag is sent to the mill 3 for grinding to obtain zinc-containing waste paint slag particles.

[0056] 4 Pass the zinc-containing waste paint slag particles, oxygen carrier and water into the combustion reactor 4 according to the mass ra...

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Abstract

The invention discloses a system and process for chemical chain transformation, recovery of non-magnetic metal oxides and co-production of hydrogen. The process includes: 1. Pretreatment: cleaning, drying and deodorizing solid waste to obtain clean solid waste particles. 2 Recovery of non-magnetic metal oxides and co-production of hydrogen-rich gas: the solid waste particles obtained in 1, oxygen carrier and water are subjected to chemical chain combustion according to a certain ratio, and the non-magnetic metals with industrial value in the solid waste particles are oxidized The material is recovered and co-produces hydrogen-rich gas. 3. Oxygen carrier circulation: Oxidize the oxygen carrier after the reaction in 2, so that the oxygen carrier can be recycled. The invention combines the chemical chain combustion technology with the solid waste treatment technology, realizes the resource utilization of solid waste, solves the pollution problem caused by burial and incineration of solid waste, and at the same time removes non-magnetic metals with industrial value in solid waste The recovery of oxides and the co-production of hydrogen-rich gas have very good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a system and process for chemical chain conversion, recovery of non-magnetic metal oxides and co-production of hydrogen. Background technique [0002] With the development of social productivity and the improvement of industrialization in our country, the output of industrial hazardous waste has increased rapidly. How to effectively recover metal oxides in solid waste and further realize their recycling is critical. Take paint waste as an example. As a common industrial hazardous waste, paint waste was listed as HW21 dye and paint hazardous waste in the "National Hazardous Waste List" revised in 2008. Paint waste is mainly formed by the condensation of spray paint mist and flocculant of automobile paint, and the main components are intermediate paint, top coat and thinner. The chemical composition of paint residue generally includes the following subst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/02C01B13/16C01G23/047C01G9/02
CPCC01B3/02C01B13/16C01G23/08C01G9/02
Inventor 吴志强张杰张博杨伯伦
Owner XI AN JIAOTONG UNIV
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