Unlock instant, AI-driven research and patent intelligence for your innovation.

Evaporative treatment method for aqueous solution

A treatment method and technology of aqueous solution, applied in water/sewage treatment, heating water/sewage treatment, evaporation, etc., can solve the problems of large consumption and increased treatment cost, and achieve the effect of high-efficiency evaporation treatment

Inactive Publication Date: 2015-01-14
SASAKURA ENG CO LTD
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hot lime method not only consumes a lot of chemicals and heating energy for precipitating silica, but also requires additional treatment of the generated sedimentation waste, resulting in increased treatment costs.

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
  • Evaporative treatment method for aqueous solution
  • Evaporative treatment method for aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. figure 1 It is a structural schematic diagram of the evaporation treatment apparatus used for the evaporation treatment method of the aqueous solution which concerns on one Embodiment of this invention. like figure 1 As shown, the evaporation treatment device 1 includes a storage tank 10 for storing an aqueous solution to be processed, and an evaporation concentration device 20 for supplying the aqueous solution from the storage tank 10 .

[0018] The storage tank 10 includes a stirrer 12 , and the aqueous solution supplied from the aqueous solution supply line 13 and the seed crystal supplied from the seed tank 14 by the operation of the injection pump 15 are uniformly mixed in the storage tank 10 .

[0019] The evaporative concentration device 20 is of the thin-film flow-out type, and includes a heat exchanger 21 having heat transfer tubes 21a arranged horizontally i...

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 present invention provides an aqueous solution evaporative treatment method that makes it possible to efficiently perform evaporative treatment of a silica-containing aqueous solution. The aqueous solution evaporative treatment method comprises a seed crystal mixing step of adding to and mixing with a silica-containing aqueous solution a silicate as seed crystals and an evaporative concentration step of evaporatively concentrating the aqueous solution together with the seed crystals. The silicate is preferably magnesium silicate and / or calcium silicate.

Description

technical field [0001] The present invention relates to a method for evaporating an aqueous solution, and more specifically, to a method for evaporating an aqueous solution in which an aqueous solution containing silica is evaporated by indirect heating. Background technique [0002] When an aqueous solution containing impurities such as silica is evaporated by indirect heating, fouling tends to adhere to the heat transfer surface of the heat exchanger, resulting in a decrease in the heat transfer coefficient. Therefore, countermeasures have been studied for a long time. For example, Patent Document 1 discloses a wastewater treatment method in which calcium contained in wastewater is precipitated as calcium carbonate crystals by adding sodium carbonate to wastewater containing calcium and sulfuric acid, and then concentrated by boiling evaporation with indirect heating. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Unexamined ...

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): C02F9/10C02F1/04B01D1/00
CPCC02F2101/10C02F1/048B01D1/22B01D5/006C01B33/22C01B33/24C02F1/08
Inventor 水谷淳二藤本阳田口龙也
Owner SASAKURA ENG CO LTD