System and method for producing 3.5-valence high-purity vanadium electrolyte

Patent metadata

Field	Value
Publication number	US-10673088-B2
Application number	US-201716074075-A
Country	US
Kind code	B2
Filing date	Jan 16, 2017
Priority date	Jan 28, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A system and method for producing a 3.5-valence high-purity vanadium electrolyte, comprising hydrolyzing high-purity vanadium oxytrichloride into vanadium pentoxide in a fluidized bed, and reducing vanadium pentoxide into a low-valence vanadium oxide having an average vanadium valence of 3.5 adding water and a sulfuric acid solution under a microwave field applied externally for dissolution at a low temperature, to obtain a 3.5-valence high-purity vanadium electrolyte. The preparation of vanadium pentoxide by means of gas-phase hydrolysis in the fluidized bed is of short process and high efficiency. By providing an internal member within the reduction fluidized bed, the precise regulation of the valence state of the reduction product is achieved, and the special chemical effect of the microwave field is used to promote dissolution of the vanadium oxide and activate the vanadium ions, thereby greatly improving the activity of the electrolyte.

First claim

What is claimed is:

1. A system for producing a 3.5-valence high-purity vanadium electrolyte, comprising a vanadium oxytrichloride storage tank, a gas phase hydrolysis fluidized bed, a vanadium pentoxide feeding device, a preheat dedusting device, a reduction fluidized bed, a primary cooling device, a secondary cooling device, a low-valence vanadium oxide feeding device a dissolution and activation device, a tail gas washing absorber, an induced draft fan and a chimney;
wherein the gas phase hydrolysis fluidized bed comprises a vanadium oxytrichloride vaporizer, a clean water vaporizer, a chloride spray gun, a gas phase hydrolysis fluidized bed body, a hydrolysis fluidized bed discharger, and a hydrochloric acid tail gas absorber;
the vanadium pentoxide feeding device comprises a vanadium pentoxide hopper and a vanadium pentoxide screw feeder;
the preheat dedusting device comprises a venturi preheater, a first cyclone separator, a cyclone preheater, and a bag-type dust collector;
the reduction fluidized bed comprises a feeder, a bed body, a discharger, a gas heater, a gas purifier, and a cyclone dust collector;
the primary cooling device comprises a venturi cooler, a second cyclone separator and a cyclone cooler;
the low-valence vanadium oxide feeding device comprises a low-valence vanadium oxide hopper and a low-valence vanadium oxide screw feeder;
the dissolution and activation device comprises a stirring and dissolving device and a microwave activation device;
wherein a feed outlet at the bottom of the vanadium oxytrichloride storage tank is connected with an inlet of the vanadium oxytrichloride vaporizer through a pipeline; the inlet of the vanadium oxytrichloride vaporizer is connected with a purified nitrogen gas main pipe through a pipeline; a gas outlet of the vanadium oxytrichloride vaporizer is connected with a gas inlet of the chloride spray gun through a pipeline; an inlet of the clean water vaporizer is connected with a clean water main pipe and a purified air main pipe through pipelines, respectively; a gas outlet of the clean water vaporizer is connected with a gas inlet at the bottom of the gas phase hydrolysis fluidized bed body through a pipeline; a gas outlet at the top of the expansion section of the gas phase hydrolysis fluidized bed body is connected with a gas inlet of the hydrochloric acid tail gas absorber through a pipeline; a hydrochloric acid solution outlet is provided at the bottom of the hydrochloric acid tail gas absorber; a gas outlet of the hydrochloric acid tail gas absorber is connected with a gas inlet of the tail gas washing absorber through a pipeline; a feed outlet at the upper part of the gas phase hydrolysis fluidized bed body is connected with a feed inlet of the hydrolysis fluidized bed discharger through a pipeline; an aeration air inlet of the hydrolysis fluidized bed discharger is connected with the purified nitrogen gas main pipe through a pipeline; and a feed outlet of the hydrolysis fluidized bed discharger is connected with a feed inlet of the vanadium pentoxide hopper through a pipeline;
a feed outlet at the bottom of the vanadium pentoxide hopper is connected with a feed inlet of the vanadium pentoxide screw feeder; and a feed outlet of the vanadium pentoxide screw feeder is connected with a feed inlet of the venturi preheater through a pipeline;
a feed outlet of the venturi preheater is connected with a feed inlet of the first cyclone separator through a pipeline; a gas outlet of the first cyclone separator is connected with a gas inlet of the bag-type dust collector through a pipeline; a feed outlet of the first cyclone separator is connected with a gas inlet of the cyclone preheater through a pipeline; a gas outlet of the bag-type dust collector is connected with a gas inlet of the tail gas washing absorber through a pipeline; a fine powder outlet of the bag-type dust collector is connected with the gas inlet of the cyclone preheater through a pipeline; the gas inlet of the cyclone preheater is connected with a gas outlet of the cyclone dust collector through a pipeline; a gas outlet of the cyclone preheater is connected with a gas inlet of the venturi preheater through a pipeline; and a feed outlet of the cyclone preheater is connected with a feed inlet of the feeder through a pipeline;
a feed outlet of the feeder is connected with a feed inlet of the bed body through a pipeline; an aeration air inlet of the feeder is connected with the purified nitrogen gas main pipe; a gas inlet of the bed body is connected with a gas outlet of the gas heater through a pipeline; a vertical baffle is provided in the bed body; a feed outlet of the bed body is connected with a feed inlet of the discharger through a pipeline; a gas outlet of the bed body is connected with a gas inlet of the cyclone dust collector through a pipeline; the gas outlet of the cyclone dust collector is connected with the gas inlet of the cyclone preheater through a pipeline; a feed outlet of the cyclone dust collector is connected with the feed inlet of the discharger through a pipeline; a feed outlet of the discharger is connected with a feed inlet of the venturi cooler through a pipeline; an aeration air inlet of the discharger is connected with the purified nitrogen gas main pipe; the gas outlet of the gas heater is connected with the gas inlet of the bed body through a pipeline; a gas inlet of the gas heater is connected with a gas outlet of the gas purifier and a gas outlet of the second cyclone separator through pipelines, respectively; a fuel inlet of the gas heater is connected with a fuel main pipe through a pipeline; a combustion air inlet of the gas heater is connected with a compressed air main pipe through a pipeline; and a gas inlet of the gas purifier is connected with a reducing gas main pipe through a pipeline;
the feed inlet of the venturi cooler is connected with a feed outlet of the discharger; a gas inlet of the venturi cooler is connected with a gas outlet of the cyclone cooler through a pipeline; a gas outlet of the venturi cooler is connected with a gas inlet of the second cyclone separator through a pipeline; the gas outlet of the second cyclone separator is connected with a gas inlet of the gas heater through a pipeline; a feed outlet of the second cyclone separator is connected with a gas inlet of the cyclone cooler; the gas inlet of the cyclone cooler is connected with the purified nitrogen gas main pipe; the gas outlet of the cyclone cooler is connected with the gas inlet of the venturi cooler through a pipeline; and a feed outlet of the cyclone cooler is connected with a feed inlet of the secondary cooling device through a pipeline;
the feed inlet of the secondary cooling device is connected with the feed outlet of the cyclone cooler through a pipeline; a feed outlet of the secondary cooling device is connected with a feed inlet of the low-valence vanadium oxide hopper through a pipeline; a water inlet of the secondary cooling device is connected with a process water main pipe through a pipeline; and a water outlet of the secondary cooling device is connected with a water inlet of a water cooling system through a pipeline;
a feed outlet at the bottom of the low-valence vanadium oxide hopper is connected with a feed inlet of the low-valence vanadium oxide screw feeder; and a feed outlet of the low-valence vanadium oxide screw feeder is connected with a feed inlet of the dissolution and activation device through a pipeline;
a clean water inlet of the stirring and dissolving device is connected with the clean water main pipe through a pipeline; a sulfuric acid solution inlet of the stirring and dissolving device is connected with a sulfuric acid solution main pipe through a pipeline; a gas outlet of the stirring and dissolving device is connected with a gas inlet of the tail gas washing absorber through a pipeline; and the stirring and dissolving device is placed i

Assignees

• Inst Process Eng Cas
• Beijing Zhongkaihongde Tech Co Ltd

Inventors

• Fan Chuanlin
• Zhu Qingshan
• Yang Haitao
• Mu Wenheng
• Liu Jibin
• Wang Cunhu
• Ban Qixun

Classifications

• C01G31/02 Primary

  Oxides · CPC title

• B01J8/1827

  the fluidising gas being a reactant · CPC title

• C01P2006/80

  Compositional purity · CPC title

• Y02E60/528

  Cross-Sectional Technologies · mapped topic

• H01M8/18 Primary

  Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title