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PWI Co., Ltd.

Solutions

Solutions

Coalbed Methane Extraction Water Softening

Three years warranty

Three years warranty

Skidding assembly

Skidding assembly

Commissioning and training

Commissioning and training

Specificities

The main sources of CBM wastewater are:


(1) Drilling fluids: Drilling fluids are specialised slurries, usually with chemicals added to protect the well wall, and are usually formulated with water, bentonite and sodium hydroxide.

(2) Fracturing fluid: Fracturing fluid can be used to improve the yield of coalbed methane extraction, and it usually plays the roles of thickening, cross-linking and pH adjustment, etc. The main components of its formula are salts, strong alkaline substances and surfactants.

(3) Gas drainage: gas extraction usually adopts the drainage method, so the composition of wastewater discharged is similar to that of groundwater, and certain ions may exceed the standard in some areas.

(4) Domestic wastewater: wastewater discharged from the production site.



To sum up, the nature of CBM wastewater can be expressed in the following aspects:


(1) The extracted water contains a variety of inorganic ions, among which, the anions are dominated by Cl- and HCO-, and the cations are dominated by Na+ and K+.

(2) The most obvious characteristics of the extracted water are high salinity and high mineralisation.

(3) Due to the fracturing fluid, the wastewater will have excessive organic matter.

(4) There are problems of heavy metal ions exceeding the standard.


Process flow diagram

Equipment list

Capacity 5-75m 3/h

Name

Basic system

Quantity

Senior system

Quantity

Complete system

Quantity

System description

Reaction system

Sludge pump

1 unit

Sludge pump

1 unit

Sludge pump

2 units

The reaction system mainly doses right chemicals such as coagulants and coagulants to the sludge to promote the flocculation of sludge particles and improve its dehydration performance.

Pipeline mixer

4 pieces

MR reaction tank

1 set

MR reaction tank

1 set

Acid alkali dosing cartridge

1 piece

Acid alkali dosing cartridge

2 pieces

Acid alkali dosing cartridge

2 pieces

Acid alkali dosing pump

1 unit

Acid alkali dosing pump

1 unit

Acid alkali dosing pump

2 units

Calcium hydroxide dosing bucket

1 piece

Calcium hydroxide dosing bucket

2 pieces

Calcium hydroxide dosing bucket

2 pieces

Calcium hydroxide dosing pump

1 unit

Calcium hydroxide dosing pump

1 unit

Calcium hydroxide dosing pump

2 units

Sodium carbonate dosing bucket

1 piece

Sodium carbonate dosing bucket

2 pieces

Sodium carbonate dosing bucket

2 pieces

Sodium carbonate dosing pump

1 unit

Sodium carbonate dosing pump

1 unit

Sodium carbonate dosing pump

2 units

PH online detector

1 piece

PH online detector

1 piece

PH online detector

1 piece

Flowmeter

/

Flowmeter

/

Flowmeter

1 piece

Sedimentation system

VMC

1 unit

VMC

1 unit

VMC

1 unit

The sedimentation system is mainly used for concentration treatment of sewage, facilitating pressure filtration.

Pneumatic sludge discharge valve

1 piece

Pneumatic sludge discharge valve

1 piece

Pneumatic sludge discharge valve

1 piece

Sludge pump

1 unit

Sludge pump

1 unit

Sludge pump

2 units

Pressure filtration system

Mixing tank

1 piece

Mixing tank

1 piece

Mixing tank

1 piece

The main function of the pressure filtration system is solid-liquid separation

Feeding pump

1 unit

Feeding pump

1 unit

Feeding pump

2 units

KMP

1 set

KMP

1 set

KMP

1 set

Control system

PLC control cabinet

1 set

PLC control cabinet

1 set

PLC control cabinet

1 set

All automation control of equipment provided by our company will be integrated into this system and run fully automatically

Auxiliary materials

Pipelines, valves, cables, etc

1 batch

Pipelines, valves, cables, etc

1 batch

Pipelines, valves, cables, etc

1 batch

The specific quantity of cables and pipe valves required within the system depends on the customer's on-site situation.

Please request a detailed list of system from our sales consultant.


Function comparison

Function

Basic system

Senior system

Complete system

Fully automated control

Fault alarm

Automatic reaction container

-

Automatic backup switching

-

-

Automatic regulation of dosing

-

-

Frequency conversion control or not

-

-

Soaking interval time

4 hours

8 hours

Fully automatic


Optional features

Serial number

Name

Specifications

Function

1

Water Reuse

PE tank+pump+liquid level gauge+integrated control

Transport the supernatant to the production line for reuse using pressurized transportation method

2

Special anti-corrosion

FRP Coating for the liquid connection parts

Prevent corrosion caused by high acid, high salt, high fluoride, etc

3

Special materials

304/316L, etc

Selection based on user material characteristics

4

Overall Skid Installation

Patterned steel platform+fixed bracket+trunking, pipelines, cables, etc

Easy to install, transport, and move flexibly

5

Precision filter

Including multi-stage centrifugal pump

Reduce the content of suspended solids in the filtrate and regulate water quality

6

Explosion-proof

DIIBT4/CT4, etc

Electrical components, motors, etc. placed in explosion-proof areas are classified according to different levels

7

Conveying system/temporary storage system

Conveyor/sludge storage hopper

Mud cakes can be collected through conveying equipment or temporary storage systems, reducing manual labor.


+86-523-88638888

info@pwi-de.com

66 Wuliangsi Road, Taizhou, Jiangsu, China