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Treatment process of ship tail gas denitration waste catalyst

A technology for denitrification waste catalysts and ship exhaust, which is applied in the field of resource regeneration and recycling, can solve the problems of high energy consumption in roasting, low enrichment efficiency of valuable elements, and large amount of waste water, so as to shorten the leaching time and reduce evaporation and crystallization The effect of small time and three wastes produced

Inactive Publication Date: 2020-02-04
广东诚一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] On the whole, the existing recovery process for spent SCR spent catalysts is mainly wet treatment or wet-fire combined treatment, but there are still many problems in the current process, such as: the enrichment efficiency of valuable elements is not high, waste water There are many problems such as large production volume and large roasting energy consumption, but the growing ship tail gas denitrification waste catalyst can't wait to be processed

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  • Treatment process of ship tail gas denitration waste catalyst
  • Treatment process of ship tail gas denitration waste catalyst
  • Treatment process of ship tail gas denitration waste catalyst

Examples

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Embodiment 1

[0039] A process for treating waste catalyst for denitrification of ship tail gas, comprising the following steps:

[0040] S1. Pretreatment of waste catalyst for denitrification of ship tail gas: first, crush and disassemble the waste catalyst for denitrification of ship tail gas, and recycle waste stainless steel; then, crush and sieve it, and ventilate during the process to remove dust by vacuuming Fly ash is recovered; finally, it is further ground to obtain a material containing titanium, vanadium and tungsten with a particle size of ≤200 mesh.

[0041] S2. Titanium recovery: take 100g of the material obtained in step S1, add 1 times the theoretical amount (90g) of NaOH solution to the material, then add 100ml of water, and carry out alkaline immersion at 100°C and 0.5MPa for 60min. After filtering and washing the slag with hot water, the volume of the first leaching solution was 128mL and the mass of the first leaching residue was 145.90g.

[0042] ICP was used to analy...

Embodiment 2

[0050] A process for treating waste catalyst for denitrification of ship tail gas, comprising the following steps:

[0051] S1. Pretreatment of waste catalyst for denitrification of ship tail gas: first, crush and disassemble the waste catalyst for denitrification of ship tail gas, and recycle waste stainless steel; then, crush and sieve it, and ventilate during the process to remove dust by vacuuming Fly ash is recovered; finally, it is further ground to obtain a material containing titanium, vanadium and tungsten with a particle size of ≤200 mesh.

[0052] S2, recovering titanium: take 100g of the material obtained in step S1, add 1.1 times the theoretical amount (100g) of NaOH solution to the material, then add 200ml of water, and carry out alkaline immersion at 150°C and 1.0MPa for 90min. After filtering and washing the slag with hot water, the volume of the first leaching solution is 224mL and the mass of the first leaching residue is 142.68g.

[0053] ICP was used to an...

Embodiment 3

[0060] A process for treating waste catalyst for denitrification of ship tail gas, comprising the following steps:

[0061] S1. Pretreatment of waste catalyst for denitrification of ship tail gas: first, crush and disassemble the waste catalyst for denitrification of ship tail gas, and recycle waste stainless steel; then, crush and sieve it, and ventilate during the process to remove dust by vacuuming Fly ash is recovered; finally, it is further ground to obtain a material containing titanium, vanadium and tungsten with a particle size of ≤200 mesh.

[0062] S2, recovery of titanium: take 100g of the material obtained in step S1, add 1.2 times the theoretical amount (108g) of NaOH solution to the material, then add 400ml of water, and carry out alkaline immersion at 200°C and 1.5MPa for 120min. After filtering and washing the slag with hot water, the volume of the first leaching solution was 483 mL and the mass of the first leaching residue was 150.48 g.

[0063] ICP was used...

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Abstract

The invention relates to the technical field of resource regeneration and recycling, and particularly discloses a treatment process of a ship tail gas denitration waste catalyst. The process mainly comprises the following steps of pretreatment of the ship tail gas denitration waste catalyst, titanium recovery, vanadium recovery and tungsten recovery. By adopting the process to treat the ship tailgas denitration waste catalyst, high-added-value sodium titanate, ammonium metavanadate and sodium tungstate can be efficiently enriched and recovered. Meanwhile, the whole process of the treatment process is a closed cycle, so that the resource waste is avoided, and the utilization rate of resources is improved; and the treatment process is small in three-waste generation amount theoretically, sothat the pollution to the environment is reduced, and the process is a clean recovery process.

Description

technical field [0001] The invention relates to the technical field of resource regeneration, recovery and utilization, in particular to a process for treating waste catalysts for denitrification of ship tail gas. Background technique [0002] As the largest transportation mode in the world, ship transportation has the characteristics of high safety, low cost and large single transportation volume. However, with the increasing number of ships and the increasing tonnage, the environmental problems caused by ship transportation are becoming more and more serious, which cannot be ignored. Most of the main engines of ships use heavy oil with high nitrogen and sulfur content as fuel, especially the fuel used by large ocean-going ships is mostly low-quality residual oil. The use of this type of fuel oil will produce a large amount of nitrogen oxides and sulfur oxides. Component exhaust. To eliminate the environmental pollution caused by these exhaust gases, it is often necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/12C22B34/22C22B34/36C22B1/00
CPCC22B1/005C22B7/006C22B7/009C22B34/1209C22B34/1254C22B34/225C22B34/365Y02P10/20
Inventor 杨乐能杨剑朱国平张仲军
Owner 广东诚一环保科技有限公司
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