Mine Water Treatment Project

Recently, the mine water and domestic sewage treatment system renovation project at a coal mine in Shaanxi, managed by Shanqing Environmental, was successfully completed. The treated water consistently meets discharge standards and reuse requirements. Shanqing Environmental provided process optimization design solutions and equipment replacement and maintenance plans for this project. The specific services included renovation scheme design, equipment supply, process and system optimization, replacement of old equipment, and repair services for faulty equipment.

ⅠMine Water Treatment System

1.Treatment capacity: 100-120 m³/h; actual 150 m³/h, average operation of 16 hours.

2.Treatment Process:

3.Treatment Units:

 Regulating Sedimentation Tank (Volume: 3000 cubic meters)

Inlet Water                                           Effluent Water

Removal of Inclined Tube Washing

Bracket and Inclined Tube Installation

4.Improvement Measures:

• Channel steel will be made of stainless steel, utilizing the existing stainless steel round bars. The overall height of the bracket will be increased by 50 centimeters.
• The existing carbon steel bracket is severely corroded, with the welds between the two channel steels and the wall breaking and collapsing. The upper part of the inclined tube will be secured with round pipes and ropes to prevent flotation and tilting.
• The original inclined tube was installed using a bundling method, which easily led to the tubes floating, loosening, and tilting. In this instance, each row of inclined tubes will be installed separately, with each group connected, welded, and reinforced.

Fully Automatic Filter

（2 sets, with a single set's treatment capacity of 50-60 m³/h）

Filter Cap and Media Installation

Chemical Dosing System

（2 sets of 4 units, each with a capacity of 1000 liters）

300 L dosing pumps, 2 units                            500 L dosing pumps, 2 units

Sludge Treatment System（1 set）

                                                 60 square meters of old plate-and-frame filters, underground sludge tank               180 square meters of current plate-and-frame filters, 3 tons per cycle

Ⅱ Reverse Osmosis Treatment System

1.Treatment Capacity: 80-90 m³/h

2.Treatment Process：

3.Treatment Units：

Mechanical Filter

(2 sets of 4 units, with a single set's treatment capacity of 50-60 m³/h)

Reverse Osmosis Equipment

（1 set, with a treatment capacity of 80-90 m³/h）

Chemical Dosing Equipment and Reuse Water Tank

                                                                              500 L chemical barrels, 4 sets                                                          450 m³ stainless steel water tank

4.Improvement Measures：

• During the reinstallation of equipment entry holes, valves, and pipelines, prepare necessary materials in advance. Disassemble and reseal any areas prone to leakage.
• When cleaning the filter, block the lower pipe outlet. Once cleaned thoroughly, restore or disassemble the pipe for further cleaning.
• Replace any damaged parts promptly during the disassembly process and reinforce them.

Ⅲ Domestic Sewage Treatment System

1.Treatment capacity: 300-350 m³/d, actual 400-450 m³/d.

2.Treatment Process:

3.Treatment Unit：

Sludge Dewatering

                          square meters plate-and-frame filter press                                         Pneumatic Diaphragm Pump

2 sets of mechanical filters, 15 m³/h

2 sedimentation tanks, 15 m³/h

（This time, cleaning of inclined tubes and sludge）

4.Improvement Measures:

• Sedimentation tanks are equipped with flow distribution tubes and peripheral effluent weirs. Clean the old inclined tubes and sludge, and clear the central tube.
• PAM and PAC were directly added into the flow distribution tube without separate mixing time, resulting in clogging of the central tube. This time, replace the sludge pump and improve the flexible hose connection method during installation.

Through this upgrade and renovation, the overall system's treatment performance has significantly improved:

• The equipment selected for the renovation is efficient and energy-saving, with no noise impact on the surrounding environment.
• After the renovation, all equipment can achieve systematic, fully automated operation without the need for dedicated supervision.
• After renovation and maintenance, a 1-year warranty is provided for equipment operation, ensuring worry-free renovation and repair.
• Through process and equipment optimization, the overall water treatment system's operating efficiency has improved by 12.5%. The treatment system is more stable, reducing significant water quality fluctuations that could impact production.
• A dedicated person will provide 24-hour project after-sales service and offer 1 year of free remote technical support and operational training at no additional cost.

For this project, the water treatment system optimization and renovation have been completed on schedule and to quality standards as stipulated in the contract. The stability and efficiency of the entire system have significantly improved. After project completion, free operational training is provided to the client.