WO2021128497A2 - 船舶废气脱硫排放指标控制方法、系统、装置 - Google Patents
船舶废气脱硫排放指标控制方法、系统、装置 Download PDFInfo
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- the invention belongs to the technical field of ship waste gas desulfurization, and particularly relates to a method, system and device for controlling ship waste gas desulfurization emission indicators.
- the 70th Marine Environmental Protection Committee meeting of the International Maritime Organization decided to implement a higher sulfur content standard from January 1, 2020, that is, the global marine fuel sulfur sulfur The content should not exceed 0.5%, and the European Emission Control Area (ECA) should not exceed 0.1%.
- ECA European Emission Control Area
- seawater method In terms of ship exhaust gas desulfurization technology, the main technologies at home and abroad that are on a pilot scale or have been applied on ships are: seawater method, hybrid method (seawater + sodium hydroxide or seawater + magnesium hydroxide) or magnesium-based seawater method.
- IMO stipulates that the S/C ratio (SO2(ppm)/CO2(%vol.)) of the exported exhaust gas must be equal to the S/C ratio of fuel with the corresponding sulfur content, that is, 0.5% sulfur content.
- the S/C ratio of the outlet exhaust gas corresponding to the fuel is 21.7, and the S/C ratio of the outlet exhaust gas corresponding to the fuel with 0.1% sulfur content is 4.3.
- the index requirements for discharged water include PH, PAH, turbidity and nitrate.
- the current mainstream control method is to adjust through PID control method, by setting the S/C ratio (SO2(ppm)/CO2(%vol.)) of the flue gas discharged from the scrubber outlet and Other wastewater discharge limits, feedback and adjust the frequency of the circulating pump, so that the outlet S/C ratio and wastewater discharge value are always lower than the set value.
- PID control can realize the real-time adjustment of the circulating pump frequency following the outlet S/C ratio, but the actual debugging requires a long time, the emission index fluctuates obviously, and the control has a certain lag.
- the load changes sharply or the 0.5% emission mode is switched to the 0.1% emission mode the emission value has a great risk of exceeding the standard, which may cause the ship owner to be fined for environmental protection.
- the purpose of the present invention is to provide a method, system and device for controlling the emission index of ship exhaust gas desulfurization, which solves the existing technical problems.
- a method for controlling ship exhaust gas desulfurization emission indicators including:
- ⁇ is the comparison coefficient of sulfur content
- a, b, c, and d are the initial sea trial coefficients
- ⁇ and ⁇ are the switching coefficients.
- the N value is 2;
- the N value is 3;
- N is n.
- the value of X is obtained from the actual on-site sea trial result, and a value in the range of 2 to 5 is added to the value of the sea trial result.
- the number of circulating pump starts is increased. If the load fluctuates in the critically exceeding state, the number of starting circulating pumps is increased by a delay of 80-100 seconds.
- ⁇ is used to: use ⁇ for correction in response to changes in the sulfur content of the fuel.
- the values of a, b, c, d are calculated based on the data at the 0.5% emission requirement of the first sea trial.
- ⁇ and ⁇ are used to control the sulfur content of the ship's exhaust gas by assigning values, and the value is calculated based on the data when the emission requirement of 0.1% for the first sea trial is required.
- a ship exhaust gas desulphurization emission index control system which is loaded with any method as above.
- a ship exhaust gas desulfurization emission indicator control device which applies any of the above methods.
- An embodiment of the present invention controls the frequency of the circulating pump to control the flow of washing water, so that the S/C ratio of the outlet exhaust gas emission index under each load and the outlet waste water emission index can meet the emission requirements of IMO. To achieve the effect of stable control, energy saving and consumption reduction.
- One embodiment of the present invention has simple control and quick adjustment: the control method of the present invention is used to control the ship's desulfurization system, which is very simple to implement, no need to adjust the PID, and the adjustment speed is very fast.
- An embodiment of the present invention has relatively stable control and safer emissions: the control method of the present invention only uses specific relationships to correlate control, with fewer variables and more stable system operation. By setting a certain margin during fitting, it is possible to realize that the emission index is always within the safe limit, which is safe and reliable.
- An embodiment of the present invention has wide adaptability, and the switching of different emission modes can also achieve rapid adjustment: because the fitting is performed based on the data during the trial voyage, the control method of the present invention is suitable for ships of any age and operating conditions. . At the same time, when switching between different emission modes (0.5% sulphur content and 0.1% sulphur content) is a direct switching of the functional relationship, the adjustment is rapid, avoiding the risk of excessive emissions caused by PID adjustment lag.
- Fig. 1 is a logic diagram of a control method according to an embodiment of the present invention
- Fig. 2 is a comparison diagram of PID adjustment according to an embodiment of the present invention and the adjustment of the present invention.
- a method for controlling the emission index of ship exhaust gas desulfurization which includes the following steps:
- the frequency value of the circulating pump that meets the S/C ratio of the outlet exhaust gas and the discharge value of the outlet waste water is controlled in the setting by recording the power values of the main engine and auxiliary equipment under each working condition, and the current working condition For the pump frequency below the value, construct a special function relationship to reflect the relationship between frequency Y and power x, and use this function relationship to adjust the circulating pump frequency Y:
- ⁇ is the sulfur content comparison coefficient.
- this coefficient can be used for correction. For example, when the sulfur content is set to C for the first time and then changed to D, use This functional relationship determines the value of ⁇ :
- a, b, c, and d are the coefficients for the initial sea trial, which are calculated based on the data when the emission requirement of 0.5% for the initial sea trial is required.
- ⁇ and ⁇ are the switching coefficients.
- A ME-P+(#1A.E-P+#2A.E-P+#3A.E-P+#4A. EP);
- A is the total power of the main and auxiliary machines
- M.E-P is the power of the main machine
- A.E-P is the power of the auxiliary machines
- #1, #2, #3, and #4 represent the numbers of the auxiliary machines.
- the N value is 2;
- the N value is 3;
- N is n.
- the number N of circulating pumps used corresponding to different power ratios is different.
- the following situations may be possible:
- N 2;
- N 3;
- N 4.
- the values of X 1 and X 2 are derived from the actual on-site sea trial results. That is, under the power ratio B of the load, the number of circulating pumps N can meet the actual operation requirements.
- the number N of circulating pumps in each working condition shall be obtained according to the actual sea trial results.
- the value of X is obtained from the actual on-site sea trial result, and a value in the range of 2 to 5 is added to the value of the sea trial result.
- PID adjustment requires a certain reaction time, the adjustment speed is slow and there is obvious amplitude oscillation.
- the adjustment scheme of the present invention responds quickly, can respond immediately, and reduces the probability of occurrence of oscillation phenomenon.
- the exhaust gas is cooled by the pre-spray layer 1 at the inlet of the scrubber and enters the scrubber 3, reacts with the washing water sprayed by the main spray layer 2 of the scrubber, and is discharged from the upper outlet.
- the washing water is delivered to the inlet of the washing tower and sprayed in the tower through a plurality of circulating pumps 4, and under the designed flow conditions, the ratio of the outlet waste gas S/C ratio and the outlet waste water discharge value is lower than the required value of IMO.
- the flow rate of the exhaust gas changes with the load changes of the main and auxiliary machines, and the flow rate of the washing water is adjusted by the change of the motor frequency of the circulating pump 4.
- the control method of the present invention will directly correlate and adjust through the function method.
- the controller will increase the frequency of the circulating pump and the flow of the washing water to contact the newly added waste gas, and spray washing in the washing tower. A neutralization reaction occurs, and the concentration of related indicators in the outlet wastewater is diluted at the same time, so that the S/C ratio and the discharge value of the outlet wastewater are reduced; similarly, when the main and auxiliary machines are running and gradually reduce the load, they are also controlled by the function method. , Correspondingly reduce the frequency of the circulating pump to meet the desulfurization effect and also achieve the effect of energy saving.
- the motor frequency of the washing tower circulating pump is adjusted to adjust the washing water flow.
- Each washing tower circulating pump is used as an automatic adjustment loop, and the function control method is used to automatically adjust the discharge indicators of the outlet exhaust gas and wastewater:
- the power of the auxiliary machine is at the normal use power (if possible, the power of the auxiliary machine is as high as possible), manually turn on the circulating pump (maximum number), and gradually increase the power of the circulating pump until the exhaust gas and wastewater are discharged All indicators meet emission requirements. Record the total power of the main engine + each auxiliary engine and the frequency of the circulating pump;
- another aspect of the present invention provides a ship exhaust gas desulfurization emission index control system, which is loaded with the method as in any aspect of embodiment 1, and specifically includes:
- the data acquisition unit is used to obtain the theoretical total power value and the current total power value of the host and auxiliary machines, and obtain the ratio B of the current total power value to the theoretical total power value;
- the circulating pump control unit is used to determine the starting number of the circulating pump according to the ratio B;
- the circulating pump frequency adjustment unit is used to adjust the circulating pump frequency Y using this functional relationship:
- ⁇ is the comparison coefficient of sulfur content
- a, b, c, and d are the initial sea trial coefficients
- ⁇ and ⁇ are the switching coefficients.
- a ship exhaust gas desulfurization emission indicator control device which is applied to the method in any aspect of embodiment 1 or any aspect of embodiment 3.
- the system includes:
- the data acquisition component is configured to obtain the theoretical total power value and the current total power value of the host and auxiliary machines, and obtain the ratio B of the current total power value to the theoretical total power value;
- the circulating pump control component is configured to determine the starting number of the circulating pump according to the ratio B;
- the circulating pump frequency adjustment component is configured to adjust the circulating pump frequency Y using this functional relationship:
- ⁇ is the comparison coefficient of sulfur content
- a, b, c, and d are the initial sea trial coefficients
- ⁇ and ⁇ are the switching coefficients.
- the description with reference to the terms “one embodiment”, “example”, “specific example”, etc. means that the specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least the present invention. In one embodiment or example. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
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Description
本发明属于船舶废气脱硫技术领域，特别是涉及一种船舶废气脱硫排放指标控制方法、系统、装置。
为了减少船舶尾气中SO2对大气环境的影响，国际海事组织IMO第70届海洋环境保护委员会会议决定，自2020年1月1日起执行更高的含硫量标准的规定，即全球船用燃油硫含量应不超过0.5％，欧洲排放控制区域(ECA)不超过0.1％。目前有三种措施可以履行IMO对硫排放的要求：使用低硫燃油、使用液化天然气(LNG)、船舶废气脱硫技术(装置)。船舶废气脱硫技术方面，国内外处于中试规模或已经实船应用的主要技术有：海水法、混合法(海水+氢氧化钠或海水+氢氧化镁)或镁基-海水法等。废气脱硫技术方面，IMO规定出口废气的S/C比(SO2(ppm)/CO2(％vol.))需等同于燃用对应含硫量的燃油的S/C比，即0.5％含硫量燃油对应出口废气S/C比为21.7,0.1％含硫量燃油对应出口废气S/C比为4.3。排放水的指标要求有PH、PAH、浊度以及硝酸盐等。
废气脱硫技术的控制系统方面，目前主流的控制方法是通过PID控制法来进行调节，通过设定洗涤塔出口排出烟气的S/C比值(SO2(ppm)/CO2(％vol.))以及其他废水排放限值，反馈调整循环泵的频率，使出口S/C比、废水排放值始终低于设定值。PID控制能够实现循环泵频率实时跟随出口S/C 比进行调节，但实际调试所需要的时间较长，排放指标波动明显且控制具有一定的滞后性。在负荷急剧变化或0.5％排放模式切换到0.1％排放模式时，排放值有很大的超标风险，从而可能使船东受到环保罚款。
发明内容
本发明的目的在于提供一种船舶废气脱硫排放指标控制方法、系统、装置，通过，解决了现有的技术问题。
为解决上述技术问题，本发明是通过以下技术方案实现的：
一种船舶废气脱硫排放指标控制方法，包括：
获取主机、辅机的理论总功率值、当前总功率值，并获取当前总功率值与理论总功率值的比值B；
根据比值B确定循环泵的启动数量；
采用该函数关系调节循环泵频率Y：
Y＝γ[ax
2+αbx+βcx+d]；
其中，γ为含硫量对比系数，a、b、c、d为初次试航系数，α、β为切换系数。
可选的，在循环泵的启动数量为N的情况下：
响应于0＜B≤X
1％，N值为2；
响应于X
1％＜B≤X
2％，N值为3；
响应于X
n-2％＜B≤100％，N值为n。
可选的，X的值由现场实际试航结果得出，并在试航结果值的基础上增加2～5范围的值。
可选的，响应于硫碳比或者水质的某项指标处于临界超标状态，增加循环泵的启动数量，若负荷在临界超标状态波动，则延迟80～100秒增加循环泵的启动数量。
可选的，γ用于：响应于燃油的含硫量发生变化，采用γ进行修正。
可选的，在初次设定含硫量为C，后改为D的情况下，采用该函数关系确定γ值：
可选的，a、b、c、d的值根据初次试航0.5％的排放要求时的数据进行计算。
可选的，α、β用于：通过赋值控制船舶废气的硫含量，该值根据初次试航0.1％的排放要求时的数据进行计算。
一种船舶废气脱硫排放指标控制系统，该系统加载有如上任一方法。
一种船舶废气脱硫排放指标控制装置，该装置应用有如上任一方法。
本发明的实施例具有以下有益效果：
1、本发明的一个实施例通过控制循环泵的频率，从而控制洗涤水的流量，使各负荷下出口废气的排放指标S/C比，以及出口废水的排放指标均能满足IMO的排放要求，达到稳定控制、节能降耗的效果。
2、本发明的一个实施例控制实现简单、调节迅速：应用本发明控制方法来控制船舶脱硫系统，实现起来非常简单，无需再调节PID，且调节速度非常快。
3、本发明的一个实施例控制比较稳定，排放更安全：本发明控制方法只通过特定的关系来关联控制，变量少，系统运行更加稳定。拟合时通过设定一定的余量，可以实现排放指标始终在安全的限值以内，安全可靠。
4、本发明的一个实施例适应性广，不同排放模式的切换也可以实现快速调节：由于是根据试航时的数据进行拟合，本发明控制方法适用于任何船龄、各运行工况的船。同时，不同排放模式(0.5％含硫量与0.1％含硫量)切换时由于是函数关系的直接切换，调节迅速，避免了PID调节滞后导致排放超标的风险。
当然，实施本发明的任一产品并不一定需要同时达到以上所述的所有优点。
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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的附图。
图1为本发明一实施例的控制方法的逻辑图；
图2为本发明一实施例的PID调节与本发明的调节对比图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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它实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“开孔”、“上”、“中”、“长度”、 “内”等指示方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的组件或元件必须具有特定的方位，以特定的方位构造和操作，因此不能理解为对本发明的限制。
为了保持本发明实施例的以下说明清楚且简明，本发明省略了已知功能和已知部件的详细说明。
实施例1：
请参阅图1所示，在本实施例中提供了一种船舶废气脱硫排放指标控制方法，包括以下步骤：
S02：获取主机、辅机的理论总功率值、当前总功率值，并获取当前总功率值与理论总功率值的比值B；
S04：根据比值B确定循环泵的启动数量；
S06：根据循环泵投入数量，通过记录各个工况下的主机、辅机功率值，以及当前工况下满足出口废气S/C比以及出口废水的排放值的循环泵的频率值控制在设定值以下的泵的频率，构造特殊的函数关系来反映频率Y与功率x的关系，并采用该函数关系调节循环泵频率Y：
Y＝γ[ax
2+αbx+βcx+d]；
其中，γ为含硫量对比系数，当燃油的含硫量发生变化时，可采用该系数进行修正，举例而言，在初次设定含硫量为C，后改为D的情况下，采用该函数关系确定γ值：
a、b、c、d为初次试航系数，根据初次试航0.5％的排放要求时的数据进行计算。
α、β为切换系数，通过赋值控制船舶废气的硫含量，即可以在0.1％区与 0.5％区进行切换，该值根据初次试航0.1％的排放要求时的数据进行计算。
将该函数输入到PLC控制器中，通过函数关系的关联，实现船舶废气脱硫相关排放指标的快速控制、即时响应。
具体的，在本实施例中，记录各个工况下的主机、辅机功率值总和：A＝M.E-P+(#1A.E-P+#2A.E-P+#3A.E-P+#4A.E-P)；
其中，A为主辅机功率总和，M.E-P为主机功率，A.E-P为辅机功率，#1、#2、#3、#4代表辅机编号。
然后通过计算B＝A/理论总功率*100，得到当前功率占总功率的比值。
在本实施例的一个方面中，在循环泵的启动数量为N的情况下：
响应于0＜B≤X
1％，N值为2；
响应于X
1％＜B≤X
2％，N值为3；
响应于X
n-2％＜B≤100％，N值为n。
具体的，在本实施例中，不同功率占比比值对应使用的循环泵数量N不同。例如总共4台循环泵的情况下，可能为以下情况：
响应于0＜B≤X1％，，N为2；
响应于X1％＜B≤X2％，N为3；
响应于Xn-2％＜B≤100％，N为4。
其中，X
1，X
2的值由现场实际试航结果得出。即在该负荷的功率占比B下，循环泵数量N能满足实际运行要求。
各工况循环泵运行数量N需根据实际试航结果得出。
在本实施例的一个方面中，X的值由现场实际试航结果得出，并在试航结果值的基础上增加2～5范围的值。
在本实施例的一个方面中，响应于硫碳比或者水质的某项指标处于临界超标状态，增加循环泵的启动数量，若负荷在临界超标状态波动，则延迟80～100秒增加循环泵的启动数量。
如图2所示，PID调节需要一定的反应时间，调节速度较慢且存在明显的幅值振荡。而本发明的调节方案反应迅速，能够即时响应，降低了出现振荡现象的概率。
本实施例的一个具体应用为：
如图1所示，废气经洗涤塔入口预喷淋层1冷却后进入洗涤塔3，与洗涤塔主喷淋层2喷淋的洗涤水进行反应，再从上部出口排出。洗涤水通过多个循环泵4输送至洗涤塔入口及塔内进行喷淋，在设计的流量条件下，满足出口废气S/C比以及出口废水的排放值的比值低于IMO的要求值。废气的流量会随主、辅机的负荷变化而变化，而洗涤水的流量则通过循环泵4的电机频率变化来调节。当主、辅机运行并且慢慢增加负荷的时候，进入洗涤塔的废气会开始增加，此时出口废气的S/C比的比值也会相应增加，出口废水中相关指标也会逐渐趋近排放限值，此时，本发明的控制方法将通过函数法直接关联调节，控制器会随即增加循环泵的频率，增加洗涤水的流量来与新增的废气相接触，在洗涤塔内喷淋洗涤，发生中和反应，同时稀释出口废水中相关指标的浓度，让S/C比与出口废水的排放值降下来；同样，当主、辅机等运行并且慢慢减负荷的时候，也通过函数法控制，相应地降低循环泵的频率，满足脱硫效果同时也达到节能的作用。
实施例2：
下面结合实际例子对本发明做进一步描述。通过函数控制法，调节洗涤 塔循环泵的电机频率以调节洗涤水流量，每台洗涤塔循环泵分别做自动调节回路，采用函数控制法来自动调节出口废气及废水的排放指标：
X
1，X
2的值得出步骤为：
当主机，辅机的总负荷从0慢慢加到某个值A时，B＝A/理论总功率。2台循环泵频率达到55-60Hz，硫碳比或者水质的某项指标处于临界超标状态时，2台循环泵无法满足脱硫效率，则需要投入第3台泵，3台从最低负荷开始运行，频率根据三台泵函数法随负荷变化。此时这个B时即为X
1％，为了确保X
1％的准确度，此时计算X
1％时，需要保留点余量，X
1+(2～5)＝B。为了防止负荷在A值的附近波动所造成来回启泵和闭泵，加入延迟90秒，判断是否需要投入第3台泵。同理可得出4台泵的X
2值。
其他系数的得出步骤为：
1、主机25％负荷下，辅机功率为正常使用功率下(如有条件，辅机功率尽量高)，手动开启循环泵(最大数量)，逐步提高循环泵功率，直至出口废气及废水的排放指标均满足排放要求。记录主机+各辅机总功率及循环泵频率；
2、记录40％、50％及最大工况下主机+各辅机总功率及循环泵频率。循环泵的实际投运数量N在负荷测试中同步确定，循环泵的投运数量控制是按负荷进行判断，与功率与频率的关系式分别独立控制；
3、利用采集的数据分别计算a、b、c、α、β的值，得出实际的关联公式，将公式输入PLC程序中。除顺控启动时循环泵频率采用原固定频率外，系统启动后，循环泵频率根据该公式进行调节。
实施例3：
参照实施例1，本发明的另一方面提供了一种船舶废气脱硫排放指标控制系统，该系统加载有如实施例1中任一方面的方法，具体包括：
数据采集单元，用于获取主机、辅机的理论总功率值、当前总功率值，并获取当前总功率值与理论总功率值的比值B；
循环泵控制单元，用于根据比值B确定循环泵的启动数量；
循环泵频率调节单元，用于采用该函数关系调节循环泵频率Y：
Y＝γ[ax
2+αbx+βcx+d]；
其中，γ为含硫量对比系数，a、b、c、d为初次试航系数，α、β为切换系数。
实施例4：
参照实施例1和/或实施例3，本发明的其它方面提供了一种船舶废气脱硫排放指标控制装置，该装置应用有如实施例1中任一方面的方法或实施例3中任一方面的系统，具体包括：
数据采集组件，被配置为获取主机、辅机的理论总功率值、当前总功率值，并获取当前总功率值与理论总功率值的比值B；
循环泵控制组件，被配置为根据比值B确定循环泵的启动数量；
循环泵频率调节组件，被配置为采用该函数关系调节循环泵频率Y：
Y＝γ[ax
2+αbx+βcx+d]；
其中，γ为含硫量对比系数，a、b、c、d为初次试航系数，α、β为切换系数。
上述实施例可以相互结合。
在本说明书的描述中，参考术语“一个实施例”、“示例”、“具体示例”等 的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。
Claims (10)
- 一种船舶废气脱硫排放指标控制方法，其特征在于，包括：获取主机、辅机的理论总功率值、当前总功率值，并获取当前总功率值与理论总功率值的比值B；根据比值B确定循环泵的启动数量；采用该函数调节循环泵频率Y：Y＝γ[ax 2+αbx+βcx+d]；其中，γ为含硫量对比系数，a、b、c、d为初次试航系数，α、β为切换系数。
- 如权利要求1所述的一种船舶废气脱硫排放指标控制方法，其特征在于，在循环泵的启动数量为N的情况下：响应于0＜B≤X 1％，N值为2；响应于X 1％＜B≤X 2％，N值为3；响应于X n-2％＜B≤100％，N值为n。
- 如权利要求2所述的一种船舶废气脱硫排放指标控制方法，其特征在于，X的值由现场实际试航结果得出，并在试航结果值的基础上增加2～5范围的值。
- 如权利要求1或2所述的一种船舶废气脱硫排放指标控制方法，其特征在于，响应于硫碳比或者水质的某项指标处于临界超标状态，增加循环泵的启动数量，若负荷在临界超标状态波动，则延迟80～100秒增加循环泵的启动数量。
- 如权利要求1-3任一项所述的一种船舶废气脱硫排放指标控制方法，其特征在于，γ用于：响应于燃油的含硫量发生变化，采用γ进行修正。
- 如权利要求5所述的一种船舶废气脱硫排放指标控制方法，其特征在于，在初次设定含硫量为C，后改为D的情况下，采用该函数关系确定γ值：
- 如权利要求1-3任一项所述的一种船舶废气脱硫排放指标控制方法，其特征在于，a、b、c、d的值根据初次试航0.5％的排放要求时的数据进行计算。
- 如权利要求1-3任一项所述的一种船舶废气脱硫排放指标控制方法，其特征在于，α、β用于：通过赋值控制船舶废气的硫含量，该值根据初次试航0.1％的排放要求时的数据进行计算。
- 一种船舶废气脱硫排放指标控制系统，其特征在于，该系统加载有如权利要求1-8任一项所述方法。
- 一种船舶废气脱硫排放指标控制装置，其特征在于，该装置应用有如权利要求1-8任一项所述方法。
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