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

Acid fluorine-containing waste water sectional treatment method favorable for recycling sludge

A treatment method and resource-based technology, applied in the field of segmental treatment of acidic fluorine-containing wastewater, can solve the problems of unsatisfactory treatment effect, high sewage treatment cost, complex technology, etc., and achieve resource utilization, small footprint, Simple operation effect

Active Publication Date: 2017-10-24
HARBIN INST OF TECH +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of high sewage treatment cost, unsatisfactory treatment effect and complicated technology in the prior art, and to provide a segmented treatment method for acidic fluorine-containing wastewater that is beneficial to sludge resource utilization

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
  • Acid fluorine-containing waste water sectional treatment method favorable for recycling sludge

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode records a segmental treatment method of acidic fluorine-containing wastewater that is beneficial to sludge resource utilization. The specific steps of the method are as follows:

[0022] Step 1: Sedimentation: Pass the high-concentration acidic fluorine-containing wastewater into the storage tank 1 for storage, and store it in the 5m 3 Finally, pump the high-concentration fluorine-containing wastewater into the neutralization sedimentation tank 1 3, add calcium oxide 120g / L into the neutralization sedimentation tank 1 3, turn on the mechanical stirring paddle to stir for 30~40min, and the speed is 250~300r / min ; Pass the low-concentration acidic fluorine-containing waste water into the storage tank 2, and store 5m 3 Finally, pump the low-concentration fluorine-containing waste water to the neutralization sedimentation tank 24, add calcium oxide 15g / L into the neutralization sedimentation tank 24, turn on the mecha...

specific Embodiment approach 2

[0024] Specific embodiment 2: A segmented treatment method of acidic fluorine-containing wastewater that is beneficial to sludge resource utilization described in specific embodiment 1. In step 1, the fluoride ion concentration in the high-concentration acidic fluorine-containing wastewater 1 is ≧10000mg / L, the fluoride ion concentration in the low-concentration acidic fluorine-containing wastewater II is 285mg / L.

Embodiment 1

[0026] In this example, the two-stage fluorine-containing wastewater of Aoyu Graphite Group in Jixi City was used as the water sample, and the fluorine-containing wastewater was treated by the segmented calcium salt precipitation method, and then adsorbed by the activated alumina adsorption method. The specific scheme is as follows:

[0027] A section of water enters the storage tank 1, where it accumulates 5m 3 Finally, use a water pump to pump into the neutralization sedimentation tank, add calcium oxide 120g / L, turn on the mechanical stirring paddle and stir for 40min at a speed of 300r / min.

[0028] A section of water enters the storage tank 2, where the hoarding is 5m 3 Finally, use a water pump to pump into the neutralization sedimentation tank, add calcium oxide 15g / L, turn on the mechanical stirring paddle and stir for 40min at a speed of 300r / min.

[0029] After the neutralization reaction in the two stages of water, the sludge pump is pumped into the plate filter pr...

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 relates to an acid fluorine-containing waste water sectional treatment method favorable for recycling sludge, which belongs to the technical field of water treatment. The method comprises the following steps: (1) precipitation: introducing acid fluorine-containing waste water into a water storage pool to be stored, after a storage volume of the water reaches 5 m<3>, pumping the fluorine-containing waste water into a neutralizing precipitation pool by utilizing a water pump, adding calcium oxide into the neutralizing precipitation pool, stirring for 40min by starting a mechanical stirring paddle, wherein the rotation speed is 300r / min; and (2) adsorption: introducing the precipitates and waste water after the reaction in step (1) into a plate-frame press filter, separating the sludge and water, externally transporting the sludge, pumping supernatant to an adjusting pool, adjusting a pH of the supernatant in an adjusting pool to be neutral by utilizing hydrochloric acid or sodium hydroxide, enabling the supernatant to enter an absorption tower, wherein the water discharged from the absorption tower is the water reaching the emission standard. The method has the advantages of low cost, high calcium salt utilization rate, simple and feasible operation, and capable of reducing the content of the sludge and recycling the sludge.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a segmental treatment method of acidic fluorine-containing wastewater which is beneficial to sludge resource utilization. Background technique [0002] High-purity graphite is an important raw material for modern technology and industrial development. The acidic fluorine-containing wastewater produced by graphite purification has environmental risks. The treatment of fluorine-containing wastewater is an important guarantee for the healthy development of the graphite industry. The fluorine-containing wastewater produced by graphite purification has complex water quality and high fluoride ion concentration. It is a mixture of hydrofluoric acid, hydrochloric acid, sulfuric acid, and nitric acid. It also contains calcium ions, magnesium ions, iron ions, and fluorosilicate ions. The main treatment methods of fluorine-containing wastewater include chemical precipita...

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): C02F1/28C02F1/52C02F101/14
CPCC02F1/281C02F1/5236C02F2101/14C02F2201/007
Inventor 郑彤高学睿王鹏
Owner HARBIN INST OF TECH