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Waste-water from coal mine

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Waste-water from coal mine


  • Waste-water from coal mine

Project Name: Zhongwei coal oil production company

Project indirect:

A coal oil company is a state-owned enterprise that produces formaldehyde and oil. The waste water in the gasification workshop is ash water, and the water volume is about 100t/h. A well-known brand film was used in the factory, resulting in a large number of wire breaking and scaling. Figure:

5.jpg

In order to ensure the production water of gas workshop, the original 1 # membrane pond ash water MBR was replaced, and the backwashing system was added.

Designed water yield

86m3/h

Design flux

10L/m2·h

Design turbidity of water production

4NTU

Running time

24 hours continuous operation

Actual water yield

86m3/h,Considering the inlet water volume, half of the valve opening has reached the designed water yield.

Actual running water turbidity

1NTU

Number of membrane boxes

8 sets, each containing 54 pieces of MW20b diaphragm.


The relevant installation pictures are as follows:

 4.jpg

Raw water quality map (grey water)

 2.jpg 3.jpg

Diaphragm mounting diagram

  

The main operational data during the system test are as follows:

Water volume reaches design flow 42m3/h per class water production data is shown in table below.

Table 11 water yield data of membrane system

date

4.26—4.27

4.28-4.29

4.30-5.01

5.01-5.02

System water yield(m3)

Day shift

403

411

487

436

Night shift

445

430

488

443

 

Table 22 water yield data of membrane system

date

5.4—5.5

5.5-5.6

5.7-5.8

5.9-5.10

System water yield(m3)

Day shift

402

416

439

403

Night shift

377

426

469

446

Note: Because of the large amount of data and the little difference in water production per day, some data were selected to show the water production capacity of the membrane.


Negative pressure produced by membrane water production

The load test of the membrane was carried out after the installation. At this time, the membrane has been running in the membrane pool for more than a month. In the load test under the sub-conditions, we can see from the table above that the negative pressure has no obvious change with time, basically keep floating around a straight line. This proves that JF membrane can maintain a certain negative pressure under long running conditions. The negative pressure of No. 1 system fluctuates at 0.026 accessory and that of No. 2 membrane system fluctuates near 0.016 at design flow rate. No. 1 system is located near the pump house. The sludge may accumulate more near the bottom of the pool due to the flow direction problem. The negative pressure value of the two systems is different due to the self-priming pump itself. However, the negative pressure has no obvious change during the test period, which indirectly indicates that the membrane has good anti-pollution ability.

Turbidity data table for membrane system No. 1

date

4.264.27

4.28-4.29

4.30-5.01

5.01-5.02

System turbidity(NTU

Day shift

0

0

1

0

Night shift

0

0

1

0

 

Turbidity data table for membrane system No. 2

date

5.45.5

5.5-5.6

5.7-5.8

5.9-5.10

System turbidity(NTU

Day shift

0

0

1

1

Night shift

1

1

1

1

It can be seen from the above table that the turbidity of the system is basically 2 and 1 data. Turbidity composite design requirements. The turbidity of the No. 2 system rose to about 8 on May 3. It was checked that the suction hose was loosened during operation, which resulted in the suction of raw water into the hose and increased the turbidity. When the suction hose is tightened, the turbidity is restored to 0. This proves that the filtration accuracy of the membrane meets the requirements and performs well.

Key word:Coalminewastewater,Minewastewater,Coalminewastewatertreatment

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Address:Room 2111, Greenland and Chuang Building,

No. 450 Caoyang Road, Putuo District, Shanghai

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icon4.pngTel: 021-62586212
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Zhejiang production base:
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Add: No. 370, Century Avenue, Development

Zone, Chongfu Town, Tongxiang, Zhejiang, China

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