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Industry application

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Chemical enterprises
Most of the exhaust gases are VOCs with strong diffusion, low olfactory value and wide range of influence.
Application description
 Table 1 maximum allowable emission concentration of class I pollutants

Serial number

Classification of pollutants

Maximum allowable emission concentration

1

Total mercury

0.05 mg/L

2

Alkyl mercury

No detection

3

Total cadmium

0.1 mg/L

4

Hexavalent chromium

0.5 mg/L

5

Total arsenic

0.5 mg/L

6

Total lead

1.0 mg/L

7

Total nickel

1.0 mg/L

8

Total beryllium

0.005 mg/L

9

Total chromium

1.5 mg/L

10

Benzo (a) pyrene

0.00003 mg/L

11

Total silver

0.5 mg/L

12

totalαradioactivity

1Bq/L

13

totalβradioactivity

10Bq/L

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For the second kind of pollutants, the maximum allowable emission concentration of sampling at the discharge outlet of the pollutant discharge unit shall meet the requirements of Table 2 of this standard.Table 2 maximum allowable emission values of class II pollutants (indicators)

Serial number

Contaminants

Scope of application

First class standard

Secondary standard

1

PH

All pollutant discharge units (dimensionless)

6~9

2

chroma

All pollutant discharge units (dilution ratio)

50

80

3

Suspended solids (SS)

Chemical fertilizer

Ammonia industry

large

mg/L

60

kg/t

0.6

Small and medium sized

mg/L

80

kg/t

4.0

Ammonium phosphate and heavy superphosphate, nitrophosphate industrial mg / L

30

50

Other pollutant discharge units, mg / L

70

150

Centralized industrial wastewater treatment plant, mg / L

70

150

Other pollutant discharge units, mg / L

70

150

4

Five day biochemical oxygen demand (BOD5)

Petrochemical Industry (including petroleum refining), mg / L

20

30

Chemical fertilizer, mg / L

20

30

Inorganic chemical raw materials, mg / L

20

30

Organic chemical raw materials, mg / L

20

30

Pesticide, mg / L

20

30

Polymer, mg / L

20

30

Fine chemicals and others, mg / L

20

30

Centralized industrial wastewater treatment plant, mg / L

20

30

5

Chemical oxygen demand (COD)

Petrochemical Industry (including petroleum refining), mg / L

60

120

Chemical fertilizer

Ammonia industry

large

mg/L

100

kg/t

1.0

Small and medium sized

mg/L

120

kg/t

6.0

Other pollutant discharge units, mg / L

80

120

Inorganic chemical raw materials, mg / L

80

120

Organic chemical raw materials, mg / L

80

120

Pesticide, mg / L

100

120

Polymer, mg / L

80

120

Fine chemicals and others, mg / L

80

120

Centralized industrial wastewater treatment plant mg / L

80

100

 

 

 

 

 

Table 2 (Continued)

6

Petroleum

Chemical fertilizer

Ammonia industry

large

mg/L

5

kg/t

0.05

Small and medium sized

mg/L

5

kg/t

0.25

Other pollutant discharge units

mg/L

5

10

Other pollutant discharge units mg / L

5

10

7

Volatile phenol

Chemical fertilizer

Ammonia industry

large

mg/L

0.1

kg/t

0.001

Small and medium sized

mg/L

0.1

kg/t

0.005

Other pollutant discharge units, mg / L

0.5

Other pollutant discharge units, mg / L

0.5

8

total cyanide

Chemical fertilizer

Ammonia industry

large

mg/L

0.2

kg/t

0.002

Small and medium sized

mg/L

1.0

kg/t

0.05

Other pollutant discharge units, mg / L

0.5

Other pollutant discharge units, mg / L

0.5

9

sulfide

Chemical fertilizer

Ammonia industry

large

mg/L

0.50

kg/t

0.005

Small and medium sized

mg/L

0.50

kg/t

0.025

Other pollutant discharge units, mg / L

1.0

Other pollutant discharge units mg / L

1.0

10

Ammonia nitrogen

Petrochemical Industry (including petroleum refining) mg / L

15

30

Chemical fertilizer

Ammonia industry

large

mg/L

40

kg/t

0.4

Small and medium sized

mg/L

60

kg/t

3.0

Other pollutant discharge units, mg / L

15

25

 

 

 

 

 

 

Table 2 (Continued)

10

Ammonia nitrogen

Inorganic chemical raw materials, mg / L

15

25

Organic chemical raw materials, mg / L

15

25

Pesticide, mg / L

15

25

Polymer, mg / L

15

25

Fine chemicals and others, mg / L

15

     25

Centralized industrial wastewater treatment plant, mg / L

15

25

11

fluoride

All pollutant discharge units, mg / L

10

10

12

Phosphate (as P) (total phosphorus)

Petrochemical Industry (including petroleum refining), mg / L

0.5

1.0

Chemical fertilizer

Ammonium phosphate and heavy superphosphate, nitrophosphate industry, mg / L

20

30

Other pollutant discharge units, mg / L

0.5

1.0

Inorganic chemical raw materials, mg / L

0.5

1.0

Organic chemical raw materials, mg / L

0.5

1.0

Pesticide, mg / L

0.5

1.0

Polymer, mg / L

0.5

1.0

Fine chemicals and others, mg / L

0.5

1.0

Centralized industrial wastewater treatment plant, mg / L

0.5

1.0

Note: kg / T is the amount of pollutants allowed to be discharged per ton of ammonia production.

 

 

 

Test index

In fertilizer production   Ammonia nitrogen / nitrate content

In fertilizer production   Calcium oxide / phosphorus oxide   content

In fertilizer production   Molar ratio of sodium to phosphorus   In brine   Calcium magnesium (hardness)   content

Total amount of EDA in brine   In brine   chloride   content

In process liquid   Chlorate / hydrogen peroxide / sulfuric acid   content

In process liquid   Phosphite / hypophosphite   content

Ammonium ion / hydroxylamine in process liquid   content

In the production of deionized water   Sodium ion   content

In the production of deionized water   Silicon ion   content