夹点分析优化后的油田联合站分布式能源系统特征与节能潜力

doi:10.3976/j.issn.1002-4026.2022.06.011

Abstract

Abstract:

Currently, Shengli Oilfield has entered the period of ultrahigh water cut, thereby increasing the difficulty of exploitation and raising the cost of oil production. Energy conservation has become the main factor for controlling the cost of oil-production plants. The distributed energy system based on natural gas can be constructed by combining gas turbine or gas internal combustion engine for power generation and flue gas-driven heat pump for the recovery from sewage and heating crude oil. Energy-flow analysis and optimization can be achieved through pinch analysis of a traditional joint station and a joint station distributed energy system. Based on the energy-flow model of a gas internal combustion engine under variable working conditions, the combustion calculation of a gas internal combustion engine is performed via thermal simulation and the pinch analysis is conducted for a traditional joint station that heats crude oil via water jacket heating furnace. Based on the lithium bromide-absorption heat pump energy-flow model driven via flue-gas heat, the pinch point analysis is conducted for the distributed energy system of the joint station. A comparative analysis of the joint station distributed energy system and the traditional joint station is performed. The energy-saving potential of the joint station distributed energy system can reach 24%, contributing to the realization of the “carbon peaking and carbon neutrality” goal.

Key words: combined station, distributed energy systems, pinch analysis, energy saving and consumption reduction

CLC Number:

TE08

XU Tao, XU Fei, LIU Wei. Characteristics and energy-saving potential of a distributed energy system in the oilfield joint station based on pinch analysis[J].Shandong Science, 2022, 35(6): 80-91.

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物流号	物流名	初温/℃	终温/℃	焓差/kW	热容流率/(kW·℃^-1)
H1	分离器1出口污水	55	20	478.94	13.68
H2	分离器2出口污水	55	20	399.15	11.40
H3	分离器3出口污水	55	20	367.33	10.50
H4	分离器4出口污水	55	20	662.52	18.93
H5	分离器5出口污水	60	20	1 275.75	31.89
H6	分离器6出口污水	60	20	410.28	10.26
H7	分离器7出口污水	60	20	319.08	7.98
H8	分离器8出口污水	55	20	518.92	14.83
H9	一次沉降罐出口污水	73	20	8 882.10	167.59
H10	二次沉降罐出口污水	70	20	6 703.47	134.07
H11	三次沉降罐出口污水	79	20	2 333.16	39.55
C1	加热炉1之前的原油	53	73	831.02	41.55
C2	加热炉2之前的原油	53	73	831.02	41.55
C3	加热炉3之前的原油	53	73	831.02	41.55
C4	加热炉4之前的原油	67	79	957.33	79.78

平均温度区间/℃	温区	D_k/kW	无外界输入时热量		有外界输入时热量
平均温度区间/℃	温区	D_k/kW	I_k/kW	Q_k/kW	I_k/kW	Q_k/kW
>78~84	1	478.67	0.00	-478.67	2 070.03	1 591.37
>74~78	2	817.72	-478.67	-1 296.39	1 591.37	773.64
>72~74	3	329.77	-1 296.39	-1 626.16	773.64	443.87
>68~72	4	443.87	-1 626.16	-2 070.03	443.87	0.00
>65~68	5	-247.44	-2 070.03	-1 822.59	0.00	247.44
>58~65	6	-1 515.84	-1 822.59	-306.75	247.44	1 763.28
>55~58	7	-1 023.60	-306.75	716.85	1 763.28	2 786.88
>50~55	8	-1 956.65	716.85	2 673.50	2 786.88	4 743.53
15~50	9	-16 123.38	2 673.50	18 796.88	4 743.53	20 866.91

物流号	物流名	初温/℃	终温/℃	焓差/kW	热容流率/(kW·℃^-1)
H1	过热蒸汽进冷凝器	128.53	91.51	2 638.56	71.27
H2	冷凝器出口	91.51	91.50	0.71	71.27
H3	吸收器	73.78	68.71	361.36	71.27
H4	浓溶液出换热器	131.84	88.70	4 525.39	104.90
H5	蒸发器入口饱和水	91.50	41.00	3 599.34	71.27
H6	高温冷却水	91.00	77.00	882.00	63.00
C1	蒸发器入口饱和水	41.00	41.01	0.71	71.27
C2	稀溶液进换热器	68.71	100.20	4 371.44	138.82
C3	含水原油进换热器	53.00	73.00	2 493.05	124.65
C4	含水原油出换热器	67.00	80.00	1 620.48	124.65
C5	油田来油	52.00	68.00	1 276.59	79.79
C6	油田来油剩余部分	52.00	68.00	1 276.59	79.79

Characteristics and energy-saving potential of a distributed energy system in the oilfield joint station based on pinch analysis

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