Henan Yinchen Boiler Group Co.,Ltd

Professional Manufacturer Of Gas Boiler

Industry News

Water Quality Standard For Boiler Operation

The boiler should be operated normally, the water level in the boiler is normal, the steam pressure is stable, the water level control of the boiler drum and the protection devices are normal. The on-site must have the staff of the boilers on duty to strengthen the monitoring of each equipment and self-control instrument to ensure safety and reliability. Operation, to prevent accidents, etc., should also meet the following water quality standards:


Item

Rated Steam Pressure/
MPa

P≤1.0

1.0<P≤1.6

1.6<P≤2.5

Type

Softened Water

Demineralized Water

Softened Water

Demineralized Water

Softened Water

Demineralized Water

Feed Water

Turbidity/ FTU

≤5.0

≤2.0

≤5.0

≤2.0

≤5.0

≤2.0

Hardness/(mmol/L)

≤0.03

≤0.03

≤0.03

≤0.03

≤0.03

≤0.03

pH(25℃)

7.0~9.0

8.0~9.5

7.0~9.0

8.0~9.5

7.0~9.0

8.0~9.5

Dissolved Oxygenmg/L

≤0.1

≤0.1

≤0.1

≤0.05

≤0.05

≤0.05

Oil/  (mg/L)

≤2.0

≤2.0

≤2.0

≤2.0

≤2.0

≤2.0

All Iron/(mg/L)

≤0.3

≤0.3

≤0.3

≤0.3

≤0.3

≤0.1

Conductivity(25℃)/
(μS/cm)

≤5.5×102

≤1.1×102

≤5.0×102

≤1.0×102


Item

Rated Steam Pressure/
MPa

P≤1.0

1.0<P≤1.6

1.6<P≤2.5

Type

Softened Water

Demineralized Water

Softened Water

Demineralized Water

Softened Water

Demineralized Water

Boiler 

Water

Full Alkalinity/
(mmol/L)

No superheater

6.0~26.0

≤10.0

6.0~24.0

≤10.0

6.0~16.0

≤8.0

Superheater

≤14.0

≤10.0

≤12.0

≤8.0

Phenolphthalein mmol/L

No superheater

4.0~18.0

≤6.0

4.0~16.0

≤6.0

4.0~12.0

≤5.0

Superheater

≤10.0

≤6.0

≤8.0

≤5.0

pH(25℃)

10.0~12.0

10.0~12.0

10.0~12.0

10.0~12.0

10.0~12.0

10.0~12.0

Dissolved Solid(mg/L)

No superheater

≤4.0×103

≤4.0×103

≤3.5×103

≤3.5×103

≤3.0×103

≤3.0×103

Superheater

≤3.0×103

≤3.0×103

≤2.5×103

≤2.5×103

Phosphate (mg/L)

10.0~30.0

10.0~30.0

10.0~30.0

10.0~30.0

Sulfite (mg/L)

10.0~30.0

10.0~30.0

10.0~30.0

10.0~30.0

Relative Alkalinity

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

The boiler water should be tested to ensure that the steam quality meets the requirements.(If the demand for steam quality is not high, the upper limit of the hardness index can be appropriately relaxed.)

CONTACT US

Contact: Mr.Cheng

Phone: +86-13803714368

Tel: +86-0371-89931818

Email: info@yinchengroup.com

Add: East of Jinshui Road, Zhengdong New District Zhengzhou City