Produce their own semi cheaper than buying them on the side. Therefore, large enterprises, which use its main production Billet continuous casting and other foundry products increasingly employ child steelmaking complex, so-called mini-mills.
Such a quest for lower cost of production is controversial. On the one hand, the price of products, as well as the smooth operation of the enterprise as a whole, become less dependent on outside actors. This is a positive thing. The negative is less obvious, since its effect is blurred over time, as well as between the enterprise and society: the limitations of fixed assets of the subsidiary unit makes its manager to allocate funds for energy conservation in the last turn. Mini-enterprises, this approach exacerbated by the fact that they share permanent energy cost is higher than that of large enterprises (by analogy with the general fixed and variable costs). With an increasing number of such enterprises to increase the amount discharged into the environment of water and heat to grow the amount of electrical energy expended on heating the administrative buildings and hot water supply. In a large enterprise with a complex production process, which in the near future will serve several such complexes are not even looking at the best process, the current efficiency will lead to higher production costs in relation to the potential for such symbioses.
Since the energy hole cast of mini-plant absorbs predominantly secondary energy resources, we have considered an example of precisely this kind of waste of energy.
The composition of injection of the complex, the installed capacity of production is 500 thousand tons of continuous cast billets per year, includes the heating boiler, the annual gas consumption is for 800 staff with hot water and heat to about 2 million m3. Given the fact that for heating a heated makeup water, and within a year the temperature drop a network water is about 10 °C (respectively, by heating water in a warm period at 30 - 35 °C, in the cold - 40 - 45 °C), the gas savings for the needs of the boiler room is 9 - 11%, in-kind - about 200 thousand m3.
Costs for the event:
1. Reconstruction of the cooling loop, if it is removed from the boiler to 100 meters – UAH 60,000;
2. Installing a water pump to circulate water in the cooling circuit – UAH 50,000 - 100,000; depending on the required parameters of cooling / warming up the water;
3. Installation of plate heat exchanger unit – UAH 20,000;
4. Payment for performance of all works - UAH 50,000;
5. Development Project – UAH 30,000.
The total costs of the event will be 250 thousand UAH. The savings in terms of money (the price of natural gas for the plant is UAH 2,500 per thousand. m3) – UAH 500,000 / year, which is net of operating expenses will provide income to more than UAH 200,000 in the first year. For its financial and timing event is midcoat, fast. To its pluses should include:
• additional contributions to the state budget;
• job creation (installation and operating personnel);
• environmental effects. Includes a reduction in plant emissions, as well as saving natural resources;
• increase the prestige of the company.
