Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultrafine ammonium paratungstate evaporative crystallization device and crystallization method

An evaporative crystallization and ammonium paratungstate technology, which is applied in the directions of evaporative separation crystallization, evaporation, solution crystallization, etc., can solve the problems of unutilized steam heat energy, energy waste, and coarse evaporative crystallization crystals, so as to improve heat energy, reduce production energy consumption, improve The effect of the warm-up effect

Pending Publication Date: 2018-11-20
HUNAN MAOTIAN SHIJIE NEW MATERIALS CO LTD
View PDF13 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to recover the ammonia inside, the production enterprise usually sprays the mixed steam directly with cold water, but does not use the heat energy of the steam, which not only causes a great waste of energy, but also produces coarse crystals by evaporation and crystallization.

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
  • Ultrafine ammonium paratungstate evaporative crystallization device and crystallization method
  • Ultrafine ammonium paratungstate evaporative crystallization device and crystallization method
  • Ultrafine ammonium paratungstate evaporative crystallization device and crystallization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 and figure 2As shown, the ultrafine ammonium paratungstate evaporative crystallization device of the present invention includes an evaporative crystallization kettle 1, a first heat exchanger 2, a second heat exchanger 25 and an ammonium tungstate insulation circulation tank 3 from left to right or from right to left, A first steam pipe 6 and a filtered liquid return pipe 23 are connected between the upper part of the evaporation crystallization kettle 1 and the first heat exchanger 2, a compressor 4 is arranged on the first steam pipeline 6, and a stirring paddle is arranged in the middle of the evaporation crystallization kettle 1 18. There is a flow deflector 19 and a discharge port 20 at the bottom, and a spray device 17 at the top, and the spray device 17 is connected to the filtered liquid return pipe 23; there is a filter press 21 at the bottom of the first heat exchanger 2. The machine 21 is connected to the slurry pump 30 through a pipeline, ...

Embodiment 2

[0047] During the evaporation and crystallization process, the slurry is drawn out from the discharge port at the bottom of the evaporation crystallization kettle, and the ultrafine ammonium paratungstate just formed is trapped in the filter press through the diaphragm filter press. The purpose of filtering is to prevent APT crystals from growing up in the kettle. The usual practice is to filter APT after the evaporation and crystallization is completed, and the obtained filtrate ammonium tungstate solution is atomized through a centrifugal nozzle under negative pressure (small droplets, fast evaporation) and then enters the evaporation crystallization kettle for evaporation and crystallization. Control the stirring speed of evaporation and crystallization to 500-1000 rpm (high-speed stirring, first, it can accelerate the turnover of the liquid surface, increase the evaporation area, and facilitate the rapid precipitation of crystal nuclei; second, the growth of APT crystals is ...

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 an ultrafine ammonium paratungstate evaporative crystallization device and a crystallization method. The ultrafine ammonium paratungstate evaporative crystallization device comprises an evaporative crystallizer, a first heat exchanger, a second heat exchanger and an ammonium tungstate insulated circulating tank from the left to right or from the right to left, wherein a first steam pipeline and a filtrate return pipe are communicated between the upper part of the evaporative crystallizer and the first heat exchanger; a compressor is arranged on the first steam pipeline;the first heat exchanger and the second heat exchanger are connected through a second steam pipeline; an ammonium hydroxide discharge pipe is arranged in the middle of the bottom of the second heat exchanger, and a circulating pump is arranged on one side of the bottom; an ammonium tungstate insulated circulating tank outlet pipe is communicated between the ammonium tungstate insulated circulating tank and the input end of the circulating pump. By utilizing the ultrafine ammonium paratungstate evaporative crystallization device disclosed in the invention, the ammonium tungstate solution in the ammonium tungstate insulated circulating tank is preheated by heat carried by the steam discharged from the evaporative crystallizer, so that the production energy consumption is reduced, and filterpressing is performed in the evaporative crystallization process so as to obtain fine crystals.

Description

technical field [0001] The invention relates to the field of thermal energy utilization devices, in particular to an ultrafine ammonium paratungstate evaporation crystallization device and a crystallization method. Background technique [0002] At present, in the process of producing ammonium paratungstate (APT) by evaporation and crystallization of ammonium tungstate solution, a large amount of mixed steam of ammonia and water will be generated, and the mixed steam is about 100°C. In order to recover the ammonia inside, the production enterprises usually spray the mixed steam directly with cold water, but the thermal energy of the steam is not utilized, which not only causes a great waste of energy, but also produces coarse crystals by evaporation and crystallization. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the background technology, make improvements, and propose a superfine ammonium parat...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D9/02B01D1/00C01G41/00
CPCB01D9/0018C01G41/006
Inventor 雷吟春李湘军曹育龙蒋纯欧阳海波
Owner HUNAN MAOTIAN SHIJIE NEW MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com