WATER MANAGEMENT DEPARTMENT:

The supply of huge amount of water required in BF, Roll mills, SMS, Pig Casting Machines, sludge tank, Gas cleaning plant, Water supply, Fire fighting, Captive power plant, etc. comes under the jurisdiction of this department.

SOURCE OF WATER:

Diamond river, which is almost 5 miles distant from DSP source gate.

DISTRIBUTION OF WATER:

The water from the river comes through canals to the settler cum underground reservoir by the action of canal pumps. The work pumps then suck the water from the reservoir and supplies to various sections of the plant after proper treatment of this water. The reservoir is of about 1 mile radius, bifurcated from the middle in a way that it takes water about 3-4 days to traverse from canal pump house to works pump house. Meanwhile, the sediments get flocculated and a primary separation is affected here.

After post modernization scenario, lots of changes are occurred in DSP. Seven pump houses under WMD control, the first four are important. They are:

1.     Canal pump house,

2.     Works pump house,

3.     Rolling pump house,

4.     Foundry pump house,

5.     Old water treatment plant,

6.     Second use pump house,

7.     New drinking water treatment plant.

I.                  CANAL PUMP HOUSE

It is the first water consuming point on 8 kms long DVC canal. The raw water from the canal is lifted by 5 pumps (3 running, 2 stand by) and discharged in to storage cum settling reservoir. There is also a bi pass channel of 8’×6’ cross section through which raw water can be fed to WPH directly.

Typical Pump

Capacity 10000GPM     Head 50 ft   Speed 730-990 rpm

II.               WORKS PUMP HOUSE:

The pump house is considered to be the heart of DSP, as the entire supply of water to DSP works area is from this pump house only. Settled water from ground water reservoir is led into the suction chamber of WPH located near to reservoir through a concrete flume and rotating drum screen (2 nos.). There are 13 pumps in WPH of which four supply water to captive power plant and four to diesel driven pump. Settled water from WPH is conveyed to various unit by 3 settled water mains.

Typical pump

          Capacity 5000GPM       Head 80ft    Speed 970rpm

III.&  IV. ROLLING MILLS & FOUNDRY PUMP HOUSE

Water from various roll cooling, scale flushing, skid pipe cooling and furnace cooling are sent to rolling mills water treatment plant via scale pump house. This plant is having 3 nos. clarifloculators. Each clarifloculator remove oil & mill scale through sedimentation and sent clean but hot water to hot well sump. On the other hand water from various mills after furnace cooling is sent directly to the hot well. This hot water is pumped by 5 nos. of hot well pumps and sprayed in a natural draught cooling tower. Hot water after cooling down is sent to cold well. This cold water is pumped via 5 nos. cold well pump and it send to the mill for their service. One balanced header tank is provided to store water when drawl from mills is less than supply from pumps.

Typical pump

          Capacity 65000 m³/hr    Head 60ft    Speed 735rpm

Foundry pump house is smaller but similar to rolling mills pump house.

Typical pump

          Capacity 800 GPM        Head 110ft  Speed 735rpm

COST ASPECTS

          Since water is costly, adequate steps should be taken to optimize its consumption. For 1000 gallons of raw water, Rs.1.57 is to be paid to DVC. In addition, a pollution tax of Rs0.0225 per Kl of water intake is to be paid to the govt.