An Optimization Model Based on Electric Power Generation in Steel Industry

Table 4

Comparison of optimal results of the model.

Sign	Meaning	Value of before optimization	Value of after optimization	Unit
𝐸^gen1,𝑡	Capacity of CHP generation	11646	13524	kW
𝐸^gen2,𝑡	Capacity of CCPP generation	12542	12542	kW
𝐸^gen3,𝑡	Capacity of TRT generation	10983	10983	kW
𝐸^gen4,𝑡	Capacity of CDQ generation	49500	169500	kW
𝐸^gen7,𝑡	Sintering residual heat power generation	101025	133185	kW
𝐸^gen8,𝑡	Converter saturation steam power generation	11124	12510	kW
𝐸^gen9,𝑡	Residual heat utilization generation of converter rolling mill heating furnace fume	950	1010	kW
𝐸^gen𝑡	Total self-generating	197770	353254	kW
𝐸^buy𝑡	Outsourcing electricity	199950	44466	kW
𝑓1,𝑡	Outsourcing power coal of thermoelectric	79	68	𝑡/h
𝐹1,1,𝑡	Combust BFG of thermoelectric	340000	400000	m^3/h
𝐹1,5,𝑡	Combust BFG of startup boiler	53000	52000	m^3/h
𝐹1,6,𝑡	Combust BFG of 130-ton boiler	230000	213300	m^3/h
𝐹2,1,𝑡	Combust COG of thermoelectric	28000	30309	m^3/h
𝐹2,5,𝑡	Combust COG of startup boiler	2500	2489.7	m^3/h
𝐹2,6,𝑡	Combust COG of 130-ton boiler	1900	4181.7	m^3/h
𝐹^Gas1,𝑡	Emission capacity of BFG	2300	300	m^3/h
𝐹^Gas2,𝑡	Emission capacity of COG	7480	108	m^3/h
𝐹^Gas3,𝑡	Emission capacity of LDG	3200	350	m^3/h
𝑄1,5,𝑡	Steam S1 production of startup boiler	50	11.231	𝑡/h
𝑄1,6,𝑡	Steam S1 production of 130-ton boiler	20	58.769	𝑡/h
𝑄2,1,𝑡	Thermoelectric S2 extraction	0	0	𝑡/h
𝑄2,4,𝑡	CDQ S2 extraction	100	30	𝑡/h
𝑄2,5,𝑡	Steam S2 production of startup boiler	20	58.769	𝑡/h
𝑄2,6,𝑡	Steam S2 production of 130-ton boiler	40–50	0	𝑡/h
𝑄2,7,𝑡	Steam S2 recovery of sintering	40	60	𝑡/h
𝑄2,8,𝑡	Steam S2 recovery of converter	100	100.83	𝑡/h
𝑄2,9,𝑡	Steam S2 recovery of rolling mill	60	60.04	𝑡/h
𝑄3,1,𝑡	Thermoelectric S3 extraction	0	18.769	𝑡/h
𝑄3,6,𝑡	Steam S3 production of 130 ton boiler	220	201.23	𝑡/h
𝑆	Objective value	1501911	1166712	¥ per day