Method for producing high-purity energy storage material for liquid flow batteries by using high chromium type vanadium residue

A technology for flow batteries and energy storage materials, applied in the fields of regenerative fuel cells, vanadium oxide, chromium halide, etc., can solve the problems of low vanadium recovery rate, ecological environment impact, pipeline blockage, etc., to improve chlorination efficiency, reduce Production cost, the effect of ensuring consistency

Active Publication Date: 2019-06-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the high-chromium vanadium slag is treated by the process of "sodium roasting-leaching-vanadium precipitation-calcination decomposition", there are two main problems as follows: (1) The recovery rate of vanadium is low
In high chromium vanadium slag, chromium spinel and vanadium spinel are in solid solution together, and chromium spinel is an ore that is more difficult to oxidize and decompose than vanadium spinel, and the ordinary vanadium slag extraction method is used , the vanadium recovery rate is very low
(2) The vanadium-chromium solution mixes with each other, making it difficult to separate
Under such conditions, vanadium and chromium enter the liquid phase at the same time, making it difficult to separate effectively, and produce a large amount of chromium-containing wastewater, polluting the environment
And the sodium roasting process itself also has the following outstanding problems: (1) the flow process is lengthy, the energy consumption is high, and the production cost is high; (2) the vanadium recovery rate is low, and the recovery rate from vanadium slag to vanadium oxide products is less than 80%; (3) ) The vanadium extraction residue is difficult to handle, and sodium roasting introduces a large amount of sodium salt, which limits the residue directly returning to the blast furnace for ironmaking; (4) Environmental problems are prominent, and the leaching-vanadium precipitation process produces a large amount of harmful metal ions and sodium sulfate. Ammonia nitrogen wastewater has a serious impact on the ecological environment
However, this patent does not involve high-chromium vanadium slag, nor does it provide a separation method for ferrochromium and van...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing high-purity energy storage material for liquid flow batteries by using high chromium type vanadium residue
  • Method for producing high-purity energy storage material for liquid flow batteries by using high chromium type vanadium residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0069] Using the system described in Embodiment 1, this embodiment provides a method for producing high-purity energy storage materials for flow batteries using high-chromium vanadium slag, including the following steps:

[0070] The high chromium vanadium slag in the high chromium vanadium slag silo 1-1 enters the fluidized bed mixer 1-5 through the high chromium vanadium slag screw feeder 1-2; the carbon source silo 1-3 The carbon source enters in the fluidized bed mixer 1-5 through the carbon source screw feeder 1-4; The high-chromium vanadium slag is mixed evenly and enters the main body 1-6 of the circulating fluidized bed; the nitrogen from the nitrogen main pipe, the chlorine gas from the circulating chlorine main pipe, and the chlorine gas from the chlorine main pipe enter from the air inlet at the bottom of the main body 1-6 of the circulating fluidized bed ; While maintaining the fluidization of high-chromium vanadium slag and carbon source, a chlorination reaction o...

Embodiment 3

[0073] In this embodiment, high-chromium vanadium slag is used as raw material, wherein the mass fraction of vanadium pentoxide is 8%, the mass fraction of chromium oxide is 6%, and the processing capacity is 400kg / h. After mixing and circulating fluidized bed chlorination High-purity chromium trichloride, high-purity ferric trichloride and high-purity vanadium pentoxide energy storage materials are prepared through processes such as classification, dust collection, leaching and sedimentation, refining, and pulverization, and energy saving and consumption reduction are achieved through comprehensive utilization of waste heat the goal of.

[0074] In the fluidized bed mixer 1-5, the dosage of metallurgical coke is 5% of the mass of vanadium slag; the chlorination temperature of the circulating fluidized bed is 500°C, and the operating gas velocity of the circulating fluidized bed is 0.04m / s. The mole fraction of chlorine in the chlorine-nitrogen mixture in the air chamber is 15...

Embodiment 4

[0076] In this embodiment, high-chromium vanadium slag is used as raw material, wherein the mass fraction of vanadium pentoxide is 28%, the mass fraction of chromium oxide is 16%, and the processing capacity is 700kg / h. After mixing and circulating fluidized bed chlorination High-purity chromium trichloride, high-purity ferric trichloride and high-purity vanadium pentoxide energy storage materials are prepared through processes such as classification, dust collection, leaching and sedimentation, refining, and pulverization, and energy saving and consumption reduction are achieved through comprehensive utilization of waste heat the goal of.

[0077] In the fluidized bed mixer 1-5, the dosing amount of petroleum coke is 25% of the mass of vanadium slag; The medium is pure chlorine, the chlorination rate of vanadium pentoxide is 98%, the chlorination rate of chromium oxide is 98%, and the chlorination rate of iron oxide is 98%; the removal rate of chromium chloride in the first-s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a system and a method for producing a high-purity energy storage material for liquid flow batteries by using high chromium type vanadium residue. According to the present invention, through selective chlorination in a circulating fluidized bed, vanadium, chromium and iron in high chromium vanadium residue are converted into corresponding gaseous chlorides, and most of impurities such as manganese, titanium, silicon and the like in the vanadium residue are remained in the chlorinated residue so as to separate the valuable elements from other impurities; the gaseous chloride is subjected to high temperature dust collection to separate crude chromium trichloride, is subjected to medium temperature dust collection to separate crude ferric chloride, and is subjected to low temperature leaching to separate crude vanadium oxytrichloride; the crude chromium trichloride is subjected to volatilization purification to obtain high-purity chromium trichloride; the crude ferric chloride is subjected to volatilization purification to obtain high-purity ferric chloride; the crude vanadium oxytrichloride is subjected to rectification purification and catalytic oxidation to obtain high-purity vanadium pentoxide powder; and with the system and the method, the high-value comprehensive utilization of the high chromium type vanadium residue is achieved, and the high-purity energy storage material for liquid flow batteries is obtained through the one-step chlorination multi-stage recovery method.

Description

technical field [0001] The invention belongs to the fields of energy and chemical industry, and in particular relates to a system and method for producing high-purity energy storage materials for liquid flow batteries from high-chromium vanadium slag. Background technique [0002] Flow battery is a safe and reliable large-scale energy storage system, which has the advantages of high energy efficiency, easy system integration and scale-up. Among them, all-vanadium redox flow battery and iron / chromium redox flow battery are two battery systems with rapid development, and both have achieved battery modules above 10kW. All-vanadium redox flow batteries use vanadium pentoxide sulfuric acid solution as electrolyte; iron / chromium redox flow batteries use ferric chloride and chromium chloride hydrochloric acid solution as electrolyte; higher electrolyte purity can significantly reduce battery electrode Side reactions, so as to obtain higher energy conversion efficiency. With the r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G31/02C01G49/10C01G37/04H01M8/18
CPCY02E60/50Y02P20/10Y02P20/129
Inventor 范川林朱庆山杨海涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap