ECCJ / AOTS Malaysias training course

ECCJ / AOTS Malaysia training course

Malaysia

3. Successful cases of
Energy conservation activities
< Case Examples >

Case example : Energy conservation activity of small group <sho-shudan> (Oil refinery)

Improvement level: "Step 1"(EC Committee, especially Workers Group)
Improvement without any cost
Ideas proposed by Small Group Activity

Resolution
Adjustment of opening of spill-back control valve for Reciprocating Compressor

(case example)
Optimization of Bleaching Conditions
by "suppongroup"at KP section, JujoPaper Co., Ltd.

Problem to be improved: in Bleaching Process,

variance in brightness.
higher unit consumption of steam and chlorine dioxide

<fiber line of kraft pulp>
Wood chip digester washers bleaching process cleaning paper machine

Results of "suppongroup"s activity

1.Investigation results:
They were afraid of clogging of the stock pump due to unfamiliarity with the new equipment, so they increased the dilution watergradually.
They increased the steam consumption to keep reaction temperature higher.
They increased the chemicals consumption to keep reaction rate.
2.Improvements:
reduced the dilution water step by step, while watching the load of the stock pump;
33 to 6 m³/h
decreased the steam consumption , to lower the temperature at the steaming mixer;
over 70 to 60
results; brightness increased and has kept the standard value.pulp density increased, so the consumption of chlorine dioxide has decreased.
3.Effect of improvements:

steam reduction: 63 t/day
chemicals reduction: 27 m3/day

Merit: 240,000us$/y

(case example)
<successful case in pulp and paper manufacturing>
Improvement of cleaning method for heat exchanger
By "power supply team A"at engineering dept., sanyokokusakupulp co.,ltd.

Problem to be solved: concerning the heat exchanger in boiler section,the temperature of hot water is getting lower and lower.to be shut down frequently to clean the deposited slime inside of it.( and to be cleaned with brushes by manpower.)to cause shortage of hot water supply to the pulp treatment line.

Trialimplemented by the small group of "team A"

Effect of improvements:
1. increase of heat recovery at the heat exchanger (average temperature up: 8°C)decrease of the oil consumption for heating: 98,000us$/y
2. need less of the shut down of the heat exchanger decrease of the steam consumption at the bleaching process: 30,000us$/yfree from the cleaning cost : 137,000us$/y

8/14
Next