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首页> 外文期刊>Indian journal of power and river valley development >Impact of new water consumption norms for power plants in 2×125MW Barsingsar thermal power station, NLC India Ltd.
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Impact of new water consumption norms for power plants in 2×125MW Barsingsar thermal power station, NLC India Ltd.

机译：新型水消耗规范的影响为2×125MW Barsingsar Thermal Power Station，NLC India Ltd.

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摘要

Water is the basic necessity for survival. India has only 4 per cent of its fresh water resources. Out of which, 87% of water is used by the thermal power plants for its needs. Due to the increasing demand, it becomes important to look for holistic approaches for water conservation and management. As per the latest MoEF and CC Gazette notification dated 07-12-2015, water consumption for all existing CT based thermal plants should reduce specific water consumption up to maximum of 3.5 m~3/MWh within a period of two years from the date of publication. Barsingsar thermal power station (BTPS) of NLC India Ltd., achieved the above MoEF and CC norms (i.e. 2.933 mi/MWh for 2016-17) by following optimization techniques. 1. Reducing blow down through increasing COC (reduce) 2. Reusing effluent water effectively (reuse) In cooling tower operation, water consumption is more than 80% of thermal water needs, due to evaporation. By reducing the above consumption through increase in cycles of concentration, thus results in decrease of direct blow down. By increasing the COC from designed value of 3 to 5, the DBD reduced from around 285 m~3/hr to 150 m~3/hr. Hence the water consumption got drastically reduced by around 8,28,000 m~3/annum (which is around 19.25% of total annual consumption). This reduced direct blow down water collected along with DM plant effluent, treated sewage water, thickener overflow from pre-treatment plant, process line drains, and CBD/IBD drains in guard pond. This collected water from guard pond is then treated to get the neutral pH and after checking effluent parameters according to the pollution norms, this water is used for mainly pit head lignite mines dust suppression system and dust suppression of lignite handling system and ash handling system, gardening, sanitation and flushing purposes. Around 45000 m~3/month (5,40,000 m~3/annum) of water is being discharged to mines dust suppression by EDP pumps and thus reused. 1. Total Water conserved through reduction of blow down by maintaining higher COC, is 8,28,000 m~3/annum (which is around 19.25% of total annual consumption). 2. The effluent water is not let out, as it is being reused effectively for dust suppression in mines thus achieving water conservation of 5,40,000m~3/annum which is around 12.5% of total annual consumption. 3. Considering the above reuse and reduce operations, total water conserved is around 31.75% of total annual water consumption. 4. Therefore specific water consumption of 2.933m~3/MWh was achieved for the year 2016-17, which is well below the MoEF and CC norms through the above implementation. 5. The discharge limits set by pollution control boards were met. 6. A clean, green and healthy environment is maintained in and around the plant premises.
机译：水是生存的基本必要性。印度只有4％的淡水资源。其中，热电厂使用87％的水供需要。由于需求不断增加，寻找水资源保护和管理的整体方法变得重要。根据最新的MOEF和CC Gazette通知日期为07-12-2015，所有现有CT的热电厂的耗水量应在两年后的时间内降低最多3.5米〜3 / mWH的时间出版物。 NLC India Ltd.的Barsingsar火电站（BTPS）实现了上述MoF和CC规范（即2016-17的2.933 Mi / MWH）通过以下优化技术。 1.通过增加COC（减少）2.减少污水水有效（重复使用）冷却塔操作，由于蒸发，耗水量超过了热水需求的80％以上。通过增加浓度循环的上述消耗，从而导致直接吹动的降低。通过将COC从设计值增加3到5，DBD减少约285m〜3 / hr至150m〜3 / hr。因此，耗水量大幅减少约8,28,000米〜3 /年（约占年度消费总量的19.25％）。这种减少了直接的吹水水，与DM植物流出物，处理过的污水水，从预处理厂，工艺线排水和CBD / IBD排水管溢出的增稠剂溢出。然后将该来自保护池的收集的水进行处理以获得中性pH，并根据污染规范检查流出参数后，这种水主要用于坑头褐煤矿山灰尘抑制系统和灰泥抑制褐煤处理系统和灰处理系统，园艺，卫生和冲洗目的。大约45000米〜3 /月（5,40,000毫米〜3 / unlum）水被排出，通过EDP泵进行粉尘抑制，从而重复使用。 1.通过维持更高的COC减少爆发的总水分，是8,28,000毫米/年（占总消费总量的19.25％）。污水不泄露，因为它正在有效地重复使用，以便在矿山中进行尘埃抑制，从而实现5,40,000M〜3 /年的水资源，占年度消费总量的12.5％。 3.考虑到以上再利用和减少运营，总水保守约占年度耗水总量的31.75％。因此，2016-17年的特定用水量为2.933米〜3 / MWH，通过上述实施，这是远远低于MOEF和CC规范的。 5.满足污染控制板设定的放电限制。 6.植物场内和周围地区保持清洁，绿色和健康的环境。

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