US 12,422,798 B1
Process adjustment control method and syetem based on production line co-production
Pihuan Cui, Tianjin (CN); Xiangping Wang, Tianjin (CN); Zhiqiang Li, Tianjin (CN); Chao Wang, Tianjin (CN); Huiji Song, Tianjin (CN); Xiaomeng Kang, Tianjin (CN); Fanming Deng, Tianjin (CN); Zeyu Tong, Tianjin (CN); and Zhe Wang, Tianjin (CN)
Assigned to HUANENG (TIANJIN) GAS POWER CO., LTD., Tianjin (CN)
Filed by HUANENG (TIANJIN) GAS POWER CO., LTD., Tianjin (CN)
Filed on Mar. 17, 2025, as Appl. No. 19/082,151.
Application 19/082,151 is a continuation of application No. PCT/CN2025/076618, filed on Feb. 10, 2025.
Claims priority of application No. 202411407471.4 (CN), filed on Oct. 10, 2024.
Int. Cl. G05B 13/04 (2006.01); C07C 29/00 (2006.01); G06F 17/11 (2006.01)
CPC G05B 13/042 (2013.01) [C07C 29/00 (2013.01); G06F 17/11 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A process adjustment control method based on production line co-production, comprising:
completing full load state operation under load adjustment according to production line co-production, and indirectly adjusting change of power generation load by adjusting ethanol production process load;
optimizing load rate provided by gas turbine in a production line co-production process through fuel oil provided by ethanol storage tank in a change process of adjusting power generation load, based on rate influence of production line co-production;
adjusting optimized load rate based on the production line co-production in a load adjustment state, and completing a process adjustment control of production line co-production through a mutual feedback mechanism of sensors and a data acquisition model;
wherein adjusting optimized load rate comprises calculating a synthetic gas volume distribution ratio of a power generation device and an ethanol production line co-production device according to a synthetic gas volume distribution rule, and adjusting the load rate of the gas turbine through the fuel oil provided by the ethanol storage tank based on the synthetic gas volume distribution ratio;
wherein a calculation formula of the synthetic gas volume distribution ratio is:

OG Complex Work Unit Math
wherein ΔLtotal represents the synthesis gas volume distribution ratio, and Pmax represents maximum synthesis gas demand of the power generation device;
when ΔLtotal>0, the load rate increases, and then, detecting current load state Lethanol of the ethanol production line co-production device;
if Lethanol>Lethanol_min, reducing synthetic gas volume of the ethanol production line co-generation device and increasing synthetic gas volume of the power generation device, so that the ethanol production process load is in a normal state, wherein Lethanol_min represents a minimum value of current load of the ethanol production line co-generation device, and then, adjusting load rate of the gas turbine, a specific calculation formula for adjustment is:

OG Complex Work Unit Math
wherein Rchange represents a load rate of adjusted gas turbine, Rbase represents a basic load rate, β represents a fuel oil adjustment coefficient of a load rate, and Vfuel_ethanol represents fuel oil volume provided by the ethanol storage tank;
when ΔLtotal<0, the load rate decreases, and then, detecting current load Lethanol of the ethanol production line co-production device;
if Lethanol<Lethanol_min, increasing the synthetic gas volume of the ethanol production line co-production device and reducing the synthetic gas volume of the power generation device, so that the ethanol production process load is in a normal state, and then, adjusting a secondary load rate of the gas turbine, a specific calculation formula for adjustment is:

OG Complex Work Unit Math
wherein Rchange2 represents a secondary load rate of the adjusted gas turbine, and γ represents a fuel oil adjustment coefficient of the secondary load rate;
the full load state comprises adjusting power generation device load by reducing or increasing ethanol process load under a condition of based on production line co-production ethanol;
wherein adjusting the power generation device load comprises adjusting according to the synthetic gas volume distribution rule of the power generation device, wherein the synthetic gas volume distribution rule comprises building a mathematical model of a system according to operating characteristics of ethanol production line under a full load state, and the mathematical model comprises processing load ranges, load change rates, inertia characteristics and production efficiencies of the production line co-production device and the power generation device, and pre-analyzing the mathematical model through a multi-objective optimization algorithm;
the multi-objective optimization algorithm comprises optimizing parameters of the synthetic gas volume distribution rule according to multivariate objectives, and calculating based on optimized parameters to obtain the synthetic gas volume distribution rule, and a specific calculation formula of the parameters is:
Vsynthetic gas for power generation=α·Vtotal synthetic gas;
wherein α represents parameters, Vtotal synthetic gas represents total synthesis gas volume, Vsynthetic gas for power generation represents synthesis gas volume of the power generation device, and Vsynthetic gas for ethanol represents synthesis gas volume of the ethanol production line co-production device;
adjusting change of power generation load comprises decomposing production line co-production when load adjustment being in a full load state, and decomposition comprises performing full load production on production line co-production units according to air separation, gasification, purification and desulfurization, and adjusting amplitudes of the power generation device and the ethanol production line co-production device by calculating obtained parameters of synthesis gas volume distribution rule;
wherein when the system requires to increase load of the power generation device, detecting a current load state of the ethanol production line co-production device by the system, reducing the synthetic gas volume Vsynthetic gas for ethanol of ethanol production line co-production device and increasing the total synthetic gas volume Vtotal synthetic gas through an intelligent control system, so as to enhance the power generation load;
when the system requires to reduce the load of the power generation device, detecting a current load state of the ethanol production line co-production device by the system, increasing the synthetic gas volume Vsynthetic gas for ethanol of ethanol production line co-production device and reducing the total synthetic gas volume Vtotal synthetic gas through the intelligent control system, so as to reduce the power generation load.