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

Pretreatment system and method for wastewater with high calcium sulfate mineralization degree

A calcium sulfate and pretreatment technology, applied in the field of water treatment, to improve the treatment efficiency, the layout is reasonable and easy to control, and the settling time is shortened.

Inactive Publication Date: 2019-01-11
烟台金正环保科技有限公司
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing pretreatment technology, the present invention provides a wastewater pretreatment system and method with high calcium sulfate salinity to solve the problems in the prior art

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
  • Pretreatment system and method for wastewater with high calcium sulfate mineralization degree

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

15000

[0036] Implementation process:

[0037] The water inflow to the system is 10 m³ / h, and 10 kg of calcium sulfate seed crystals are added to the seed crystal dosing pool in advance. Add 100 mg / L of PAC, and add 1.5 mg / L of PAM in the first coagulation aid tank, and the formed calcium sulfate crystals will form large flocs for easy sedimentation; in the first inclined tube sedimentation tank, the settled calcium sulfate part Return to the seed crystal dosing pool, the return flow of sewage is 1 m³ / h, and the rest of the sewage is separated by a plate and frame filter press, and the filter residue is formed into a gypsum product with an output of 60 kg / h (gypsum with a moisture content of about 40%) product), the filtrate enters the softening precipitation system together with the sedimentation liquid in the inclined tube;

[0038] The calcium hardness content in the clear liquid is 600 mg / L, and it is softened by lime + sodium carbonate softening method. The dosage...

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 belongs to the field of water treatment and particularly relates to a pretreatment system and method for wastewater with a high calcium sulfate mineralization degree. The pretreatment system comprises a destabilization flocculent precipitation system, a precipitate softening system, a mechanical filter, an ultrafiltration and after-treatment system, sludge treatment equipment and a magnetic powder separator. The invention simultaneously provides a method for pre-treating sewage by virtue of the system. The method comprises the following steps: destabilization crystallization, flocculent precipitation, softening, flocculent precipitation, precipitation separation and filtration. The technical scheme provided by the invention can be applied to the pretreatment of coal mine water with high calcium and sulfate radical mineralization degrees, high salt content wastewater and the like, the mineralization degree content is greatly decreased after the pretreatment, and the wastewater can meet the requirement on the inflow quality of an ultrafiltration (UF) system. The preparation process can be continuously operated, has a good treatment effect and is high in treatment efficiency, simple in process flow and low in operation cost.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a waste water pretreatment system and method with high calcium sulfate salinity. Background technique [0002] Water scarcity is one of the greatest global challenges of this century. The water environment situation in China is very severe. The proportion of water bodies of inferior V grades whose entire surface water is seriously polluted is relatively high (about 10%), and some river basins even greatly exceed this figure. Water environmental emergencies involving drinking water safety occur from time to time. To this end, the country has introduced a series of policies and measures in recent years to guide the prevention and control of water pollution. In 2015, the "Water Pollution Prevention and Control Action Plan" (namely "Water Ten Measures") was launched, which provided a good external policy environment for the wastewater treatment industry . The key to sewa...

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): C02F9/04C02F5/08C02F11/00
CPCC02F1/001C02F1/5245C02F1/56C02F5/08C02F9/00C02F11/00C02F2001/007C02F2201/007C02F2301/08
Inventor 李越彪苗晶林会杰李国亮李辉胡洪吉万昌银张卓
Owner 烟台金正环保科技有限公司