Coalbed Methane Extraction Water Softening

Three years warranty

Skidding assembly

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.