CN116122956A - 一种柠檬酸废水发电的压力和空燃比调节系统及方法 - Google Patents
一种柠檬酸废水发电的压力和空燃比调节系统及方法 Download PDFInfo
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Abstract
本发明涉及发电技术领域,公开了一种柠檬酸废水发电的压力和空燃比调节系统,包括通过开关柜连接的一组发电装置,其中发电装置包括发电机和发动机,通过开关柜集成有与所述发电装置连接的计算机监控系统和远程数据处理中心,其中计算机监控系统包括集成在发电机和发动机端的远程数据输送系统、网电监控系统、单机自动同步系统、电机检测及保护系统;其中与发动机配套连接设有散热器、排放系统和进气系统。本发明通过系统整体的设计和沼气压力、浓度的精准控制,最终可达到综合效率84.6%。系统数据分别进行分类汇总,集中传输到控制单元,加强了系统的监测预警功能,达到统一控制的功能要求。
Description
技术领域
本发明涉及发电技术领域,具体为一种柠檬酸废水发电的压力和空燃比调节系统及方法。
背景技术
近年来,生物质发电在国际上越来越受到重视,在国内也越来越受到政府的关注。我国生物质发电的投资总额不断增加,常年维持在两位数以上的较高水平,市场前景广阔。沼气发电是生物质发电的一种,将厌氧发酵处理产生的沼气用于发动机上,并装有综合发电装置,以产生电能和热能,具有创效、节能、安全和环保等特点,是一种分布广泛且价廉的分布式能源。
近年来,沼气发电的需求从农村扩展到了城市(例如城市垃圾、餐饮厨余垃圾发酵等)和工业企业(例如饲料生产过程中产生的柠檬酸废水发酵等),变废为宝,可有效地提高能源的利用效率。
然而,由于柠檬酸废水经过厌氧处理产生的沼气属于低燃气品质,存在流量不稳定和可燃烧甲烷值偏小且波动的性质,导致燃气发电机组的启动和运行存在不确定性,一般的燃气发电机组无法满足,需要采取措施加以控制。所以就需要一种柠檬酸废水发电的压力和空燃比调节系统及方法。
发明内容
本发明的目的在于提供一种柠檬酸废水发电的压力和空燃比调节系统及方法,本发明能够及时根据因进口沼气的流量波动造成的压力值和浓度值变化来控制空燃比,通过燃气进气阀组、电磁阀及压力调节器进行调节,从而精准控制其压力和浓度,达到理想的可燃烧的甲烷浓度(55-60%),满足燃气发电机组运行的基本要求。
本发明是这样实现的:
本发明提供一种柠檬酸废水发电的压力和空燃比调节系统,包括通过开关柜连接的一组发电装置,其中发电装置包括发电机和发动机,通过开关柜集成有与所述发电装置连接的计算机监控系统和远程数据处理中心,其中计算机监控系统包括集成在发电机和发动机端的远程数据输送系统、网电监控系统、单机自动同步系统、电机检测及保护系统;其中发电机包括3台TCG2020V20型的高压10KV发电机组,与所述发电机配套设有电子预热器、缸套水三通阀、中冷水三通阀、废气背压开关、燃气过滤器、燃气进气阀组、电磁阀及压力调节器和与远程数据处理中连接的空燃比控制系统。
其中与发动机配套连接设有散热器、排放系统和进气系统。
其中散热器包括与发动机连接的中冷散热器、板式散热器和紧急散热器,与所述发动机还连接有提供润滑油补给的润滑油箱,所述排放系统包括与发动机输出端连接的脱销系统,搭载有脱销系统的装置连接有烟气锅炉,所述烟气锅炉通过烟气高架排放架进行废气排出,所述进气系统包括与所述发动机连接的燃气阀组,所述燃气阀组的进气端连接有进气预处理装置。
进一步,其中润滑油箱设有包括但不限于使用压力传感器监测润滑油量,通过包括但不限于使用温度传感器监测中冷散热器、板式散热器和紧急散热器的散热信息,在所述发动机和发电机上使用包括但不限于震动传感器监测发电机发电时的爆震信息,通过包括但不限于甲烷浓度监测传感器和进气压力传感器进行监测进气系统的甲烷含量与压力值;
所述的压力传感器、温度传感器、震动传感器、甲烷浓度传感器或进气压力传感器通过远程数据输送系统的现场总线接口Ethernet TCP/IP、Modbus/TCP协议通讯,进行向计算机监控系统和远程数据处理中心上传包括但不限于TEM-EVO的状态信息、测量值、信号、警报、故障信息。
其中震动传感器应用在发动机的防爆震控制,发动机的每个气缸都带有高动态防爆震控制系统,以便在甲烷值较低时仍能确保发动机运行安全。在遵守排放极限值的情况下获得最高性能和最佳效率。
进一步,本发明提供一种柠檬酸废水发电的压力和空燃比调节方法,具体按以下步骤执行:
S1:首先通过基于空气流量的空燃比,采用平均值算法,通过算法模型计算出发动机的进气系统的总进气量,其进气量的基本数据通过甲烷浓度传感器和压力传感器进行数据获取,以此设定空燃比计算出对应的燃气流量;
其中,理想状态下,进气量与发动机的各个参数模型如式(1);
其中,Qmix为混合气流量,MAP为进气道内压力值,V为发动机排量,n为转速,ηvol为充气效率值;
其中,发动机进气管内与空气流量、燃气流量的模型如式(2);
Qmix=Qair+Qgas 式(2)
其中,Qmix为混合气流量,Qair为空气流量,Qgas为燃气流量;
S2:通过式(3)计算出发动机的输出功率,具体如式(3);
Pcalc=Qgas×LHV×ηTotal 式(3)
其中,Pcalc为输出功率,LHV为燃气低热值;
S3:基于发动机的进气系统内的变化的甲烷值进行空燃比调节;通过朗格朗日插值公式计算出当前进气系统内的甲烷值浓度的燃气低热值;具体如式(4);
其中,ωpoi为当前进气系统中的甲烷浓度,ωpoi-1和ωpoi+1为当前甲烷浓度前后时刻的浓度值,LHVpoi-1和LHVpoi+1分别为当前甲烷浓度前后的实际燃气低热值;
其中,为当前进气系统中的甲烷浓度,和为当前甲烷浓度前后时刻的浓度值,和分别为当前甲烷浓度前后的实际燃气低热值;
S4:对当前甲烷浓度以及空燃比进行数据计算,当的波动幅度大于5%,则通过远程数据中心接入空燃比调节;
S5:具体通过S2-S3进行计算当前进气系统的压力以及空燃比的差异数值,具体包括进气管道内压力值、甲烷浓度值的标准值;发动机的进气系统压力包括进气管道内压力,具体包括通过管道阀口嵌插的压力传感器进行监测管道内的压力,其中与管道贯通连接有增压阀和减压阀,其中增压阀连接有增压装置。
S6:通过远程数据中心调整进气风量、和进气系统的压力值,以保证发动机的正常发电功率输出。
进一步,本发明提供一种计算机可读存储介质,其上存储有计算机程序,所述程序被主控制器执行时实现如上述中任一项所述的方法。
与现有技术相比,本发明的有益效果是:
1、通过系统整体的设计和沼气压力、浓度的精准控制,最终可达到综合效率84.6%。
系统数据分别进行分类汇总,集中传输到控制单元,加强了系统的监测预警功能,达到统一控制的功能要求。
2、能够及时根据因进口沼气的流量波动造成的压力值和浓度值变化来控制空燃比,通过燃气进气阀组、电磁阀及压力调节器进行调节,从而精准控制其压力和浓度,达到理想的可燃烧的甲烷浓度(55-60%),满足燃气发电机组运行的基本要求。
附图说明
为了更清楚地说明本发明实施方式的技术方案,下面将对实施方式中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本发明的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1是本发明的系统结构示意图;
图2是本发明的方法流程图。
具体实施方式
为使本发明实施方式的目的、技术方案和优点更加清楚,下面将结合本发明实施方式中的附图,对本发明实施方式中的技术方案进行清楚、完整地描述,显然,所描述的实施方式是本发明一部分实施方式,而不是全部的实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。因此,以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围,而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。
请参阅图1-2,一种柠檬酸废水发电的压力和空燃比调节系统,包括通过开关柜连接的一组发电装置,其中发电装置包括发电机和发动机,通过开关柜集成有与所述发电装置连接的计算机监控系统和远程数据处理中心,其中计算机监控系统包括集成在发电机和发动机端的远程数据输送系统、网电监控系统、单机自动同步系统、电机检测及保护系统;其中发电机包括3台TCG2020V20型的高压10KV发电机组,与所述发电机配套设有电子预热器、缸套水三通阀、中冷水三通阀、废气背压开关、燃气过滤器、燃气进气阀组、电磁阀及压力调节器和与远程数据处理中连接的空燃比控制系统。
其中与发动机配套连接设有散热器、排放系统和进气系统。
其中散热器包括与发动机连接的中冷散热器、板式散热器和紧急散热器,与所述发动机还连接有提供润滑油补给的润滑油箱,所述排放系统包括与发动机输出端连接的脱销系统,搭载有脱销系统的装置连接有烟气锅炉,所述烟气锅炉通过烟气高架排放架进行废气排出,所述进气系统包括与所述发动机连接的燃气阀组,所述燃气阀组的进气端连接有进气预处理装置。
本实施例中,其中润滑油箱设有包括但不限于使用压力传感器监测润滑油量,通过包括但不限于使用温度传感器监测中冷散热器、板式散热器和紧急散热器的散热信息,在所述发动机和发电机上使用包括但不限于震动传感器监测发电机发电时的爆震信息,通过包括但不限于甲烷浓度监测传感器和进气压力传感器进行监测进气系统的甲烷含量与压力值;
所述的压力传感器、温度传感器、震动传感器、甲烷浓度传感器或进气压力传感器通过远程数据输送系统的现场总线接口Ethernet TCP/IP、Modbus/TCP协议通讯,进行向计算机监控系统和远程数据处理中心上传包括但不限于TEM-EVO的状态信息、测量值、信号、警报、故障信息。
其中震动传感器应用在发动机的防爆震控制,发动机的每个气缸都带有高动态防爆震控制系统,以便在甲烷值较低时仍能确保发动机运行安全。在遵守排放极限值的情况下获得最高性能和最佳效率。
本实施例中,本发明提供一种柠檬酸废水发电的压力和空燃比调节方法,具体按以下步骤执行:
S1:首先通过基于空气流量的空燃比,采用平均值算法,通过算法模型计算出发动机的进气系统的总进气量,其进气量的基本数据通过甲烷浓度传感器和压力传感器进行数据获取,以此设定空燃比计算出对应的燃气流量;
其中,理想状态下,进气量与发动机的各个参数模型如式(1);
其中,Qmix为混合气流量,MAP为进气道内压力值,V为发动机排量,n为转速,ηvol为充气效率值;
其中,发动机进气管内与空气流量、燃气流量的模型如式(2);
Qmix=Qair+Qgas 式(2)
其中,Qmix为混合气流量,Qair为空气流量,Qgas为燃气流量;
S2:通过式(3)计算出发动机的输出功率,具体如式(3);
Pcalc=Qgas×LHV×ηTotal 式(3)
其中,Pcalc为输出功率,LHV为燃气低热值;
S3:基于发动机的进气系统内的变化的甲烷值进行空燃比调节;通过朗格朗日插值公式计算出当前进气系统内的甲烷值浓度的燃气低热值;具体如式(4);
其中,ωpoi为当前进气系统中的甲烷浓度,ωpoi-1和ωpoi+1为当前甲烷浓度前后时刻的浓度值,LHVpoi-1和LHVpai+1分别为当前甲烷浓度前后的实际燃气低热值;
其中,为当前进气系统中的甲烷浓度,和为当前甲烷浓度前后时刻的浓度值,和分别为当前甲烷浓度前后的实际燃气低热值;
S4:对当前甲烷浓度以及空燃比进行数据计算,当的波动幅度大于5%,则通过远程数据中心接入空燃比调节;
其中柠檬酸废水的发酵气体的占比如表1;
表1柠檬酸废水的发酵气体的占比
其中发动机的发电标准数据如表2;
表2发动机的发电标准
<![CDATA[系统条件<sup>1)</sup>]]> | ||
在ΔT=_时的空气进气量(包括燃烧空气)15K | kg/h | 52800 |
空气进气温度最小/设计: | ℃ | 5/30 |
尾气背压最小/最大: | mbar | 30/50 |
空气过滤器前最大压降: | mbar | 5 |
<![CDATA[燃气零压力调节管路,压力可选范围最小/最大:<sup>2)</sup>]]> | mbar | 20/200 |
<![CDATA[燃气预减压调节管路,压力可选范围最小/最大:<sup>2)</sup>]]> | bar | 0.5/10 |
24V启动电池容量: | Ah | 450 |
启动马达: | kWel./VDC | 18/24 |
润滑油容量发动机/底座: | <![CDATA[dm<sup>3</sup>]]> | 300/685 |
净重发动机/发电机组: | kg | 8070/19600 |
S5:具体通过S2-S3进行计算当前进气系统的压力以及空燃比的差异数值,具体包括进气管道内压力值、甲烷浓度值的标准值;发动机的进气系统压力包括进气管道内压力,具体包括通过管道阀口嵌插的压力传感器进行监测管道内的压力,其中与管道贯通连接有增压阀和减压阀,其中增压阀连接有增压装置。
S6:通过远程数据中心调整进气风量、和进气系统的压力值,以保证发动机的正常发电功率输出。
其中,远程数据中心还采集如表6所述的发电能量平衡条件数据,结合本发明的步骤S1-S4进行发电调节;
表6发电机发电能量平衡数据表
能量平衡 | ||||
负荷: | % | 100 | 75 | 50 |
在ISO8528-1条件下发电功率COP: | kW | 2000 | 1500 | 1000 |
缸套水热量: | kW±8% | 1111 | 828 | 573 |
中冷水热量: | kW±8% | 126 | 94 | 67 |
润滑油热量: | kW±8% | |||
尾气冷却至设定温度后热量: | kW±8% | 861 | 739 | 582 |
尾气排气温度: | ℃±25℃ | 442 | 477 | 517 |
尾气流量(湿): | kg/h | 10695 | 8045 | 5553 |
燃烧空气量: | kg/h | 9626 | 7219 | 4967 |
发动机/发电机辐射热量: | kW±8% | 73/62 | 70/53 | 67/46 |
燃料消耗: | kW+5% | 4695 | 3631 | 2576 |
发电效率/热效率: | % | 42.6/42.0 | 41.3/43.2 | 38.8/44.9 |
总效率: | % | 84.6 | 84.5 | 83.7 |
本实施例中,本发明提供一种计算机可读存储介质,其上存储有计算机程序,所述程序被主控制器执行时实现如上述中任一项所述的方法。
以上所述仅为本发明的优选实施方式而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (7)
1.一种柠檬酸废水发电的压力和空燃比调节系统,其特征在于:包括通过开关柜连接的一组发电装置,其中发电装置包括发电机和发动机,通过开关柜集成有与所述发电装置连接的计算机监控系统和远程数据处理中心,其中计算机监控系统包括集成在发电机和发动机端的远程数据输送系统、网电监控系统、单机自动同步系统、电机检测及保护系统;
其中与发动机配套连接设有散热器、排放系统和进气系统。
2.根据权利要求1所述的一种柠檬酸废水发电的压力和空燃比调节系统,其特征在于,其中散热器包括与发动机连接的中冷散热器、板式散热器和紧急散热器,与所述发动机还连接有提供润滑油补给的润滑油箱,所述排放系统包括与发动机输出端连接的脱销系统,搭载有脱销系统的装置连接有烟气锅炉,所述烟气锅炉通过烟气高架排放架进行废气排出,所述进气系统包括与所述发动机连接的燃气阀组,所述燃气阀组的进气端连接有进气预处理装置。
3.根据权利要求1所述的一种柠檬酸废水发电的压力和空燃比调节系统,其特征在于,其中润滑油箱设有包括但不限于使用压力传感器监测润滑油量,通过包括但不限于使用温度传感器监测中冷散热器、板式散热器和紧急散热器的散热信息,在所述发动机和发电机上使用包括但不限于震动传感器监测发电机发电时的爆震信息,通过包括但不限于甲烷浓度监测传感器和进气压力传感器进行监测进气系统的甲烷含量与压力值;
所述的压力传感器、温度传感器、震动传感器、甲烷浓度传感器或进气压力传感器通过远程数据输送系统的现场总线接口Ethernet TCP/IP、Modbus/TCP协议通讯,进行向计算机监控系统和远程数据处理中心上传包括但不限于TEM-EVO的状态信息、测量值、信号、警报、故障信息。
4.一种柠檬酸废水发电的压力和空燃比调节方法,其特征在于,具体按以下步骤执行:
S1:首先通过基于空气流量的空燃比,采用平均值算法,通过算法模型计算出发动机的进气系统的总进气量,其进气量的基本数据通过甲烷浓度传感器和压力传感器进行数据获取,以此设定空燃比计算出对应的燃气流量;
其中,理想状态下,进气量与发动机的各个参数模型如式(1);
其中,Qmix为混合气流量,MAP为进气道内压力值,V为发动机排量,n为转速,ηvol为充气效率值;
其中,发动机进气管内与空气流量、燃气流量的模型如式(2);
Qmix=Qair+Qgas 式(2)
其中,Qmix为混合气流量,Qair为空气流量,Qgas为燃气流量;
S2:通过式(3)计算出发动机的输出功率,具体如式(3);
Pcalc=Qgas×LHV×ηTotal 式(3)
其中,Pcalc为输出功率,LHV为燃气低热值;
S3:基于发动机的进气系统内的变化的甲烷值进行空燃比调节;通过朗格朗日插值公式计算出当前进气系统内的甲烷值浓度的燃气低热值;具体如式(4);
其中,ωpoi为当前进气系统中的甲烷浓度,ωpoi-1和ωpoi+1为当前甲烷浓度前后时刻的浓度值,LHVpoi-1和LHVpoi+1分别为当前甲烷浓度前后的实际燃气低热值;
S4:对当前甲烷浓度以及空燃比进行数据计算,当LHVpoi的波动幅度大于5%,则通过远程数据中心接入空燃比调节;
S5:具体通过S2-S3进行计算当前进气系统的压力以及空燃比的差异数值,
具体包括进气管道内压力值、甲烷浓度值的标准值;
S6:通过远程数据中心调整进气风量、和进气系统的压力值,以保证发动机的正常发电功率输出。
5.根据权利要求4所述的一种柠檬酸废水发电的压力和空燃比调节方法,其特征在于,在步骤S4中,发动机的进气系统压力包括进气管道内压力,具体包括通过管道阀口嵌插的压力传感器进行监测管道内的压力,其中与管道贯通连接有增压阀和减压阀,其中增压阀连接有增压装置。
6.根据权利要求1所述的一种柠檬酸废水发电的压力和空燃比调节系统,其特征在于,发电机包括3台TCG2020V20型的高压10KV发电机组,与所述发电机配套设有电子预热器、缸套水三通阀、中冷水三通阀、废气背压开关、燃气过滤器、燃气进气阀组、电磁阀及压力调节器和与远程数据处理中连接的空燃比控制系统。
7.一种计算机可读存储介质,其上存储有计算机程序,其特征在于,所述程序被主控制器执行时实现如权利要求4中任一所述的方法。
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CN105226613A (zh) * | 2015-10-23 | 2016-01-06 | 河南柴油机重工有限责任公司 | 一种垃圾填埋气体发电机组监控系统及方法 |
CN105257414A (zh) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | 一种垃圾填埋气体发动机控制装置及方法 |
CN210264907U (zh) * | 2019-06-18 | 2020-04-07 | 张启军 | 燃气发电机组 |
CN216811894U (zh) * | 2021-10-27 | 2022-06-24 | 杭州天子岭发电有限公司 | 低浓度填埋气发电气体稳定供给系统 |
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