基于S型皮托管的烟气流量计量方法研究

许瑞祥; 翟恒涛; 王煦; 肖远欢; 张天亮; 彭亮; 薛蕾

doi:10.12338/j.issn.2096-9015.2022.0262

基于S型皮托管的烟气流量计量方法研究

doi: 10.12338/j.issn.2096-9015.2022.0262

1.
山东省计量科学研究院，济南 250014
2.
山东省计量检测中心，济南 250014

详细信息

作者简介:
许瑞祥（1986-），山东省计量科学研究院高级工程师，研究方向：流量容量计量等，邮箱：xuruixiang@sdim.cn

计量
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出版历程
- 收稿日期: 2022-11-03
- 录用日期: 2022-12-31
- 修回日期: 2022-11-30
- 网络出版日期: 2023-02-04

Study on Flue Gas Flow Measurement Method Based on S-Type Pitot Tube

1.
Shandong Institute of Metrology, Jinan 250014, China
2.
Shandong Measurement Test Center, Jinan 250014, China

摘要

摘要: 为了研究烟气流量实测计量方法，分析了当前主要碳排放核查方法的优劣，根据实测法烟气流量测量原理，提出利用S型皮托管测量烟气流量的方法。通过对皮托管测速原理的研究，根据速度面积法流量测量方法，提出了等面积和等距离两种积分方法，对两种积分方法中皮托管的安装位置、烟道截面测量点及其分布进行比较。为验证两种积分方法的合理性，依托实验室风洞装置对两种积分方法测得的结果进行分析比较，得出两种积分方法在低流速下偏差较大，在高流速下偏差均在0.5%左右，为实测法烟气流量的精确测量提供技术支撑。
- 计量学 /
- 固定排放源 /
- 烟气流量 /
- S型皮托管 /
- 速度面积法
Abstract: To investigate the measurement method of flue gas flow, the advantages and disadvantages of current main carbon verification methods are analyzed. The background and significance of carbon emission research, as well as the progress of related research at home and abroad, are described. A method for measuring flue gas flow using an S-type pitot tube is proposed based on the measurement principle of flue gas flow. Two integration methods of equal area and equal distance are proposed based on the study of pitot tube velocity measurement principle and the flow measurement method of velocity area method. The installation position of the pitot tube, the measurement points of the flue section, and their distribution in the two integration methods are compared. The rationality and advantages of the two integration methods of equal area and equal distance are analyzed and compared theoretically. To verify the rationality of the two integration methods, the results measured by the two integration methods are analyzed and compared based on the laboratory wind tunnel device. It is concluded that the deviation of the two methods is large at low flow rate, and the deviation of the two integration methods is about 0.5% at high flow rate, which provides technical support for the accurate measurement of measured smoke and air flow. The study suggests that the proposed measurement method using S-type pitot tube is a reliable and effective way for measuring flue gas flow.
- metrology /
- stationary emission source /
- flue gas flow /
- S-type pitot tube /
- velocity-area method

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图 1 S型皮托管

Figure 1. S-type pitot tube

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图 2 满足2-8原则的圆形烟道的测点分布

Figure 2. Distribution of measurement points in circular flue with compliance to the 2-8 principle

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图 3 等面积法截面流速分布

Figure 3. Distribution of cross-sectional velocity by equal area method

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图 4 等距离法截面流速分布

Figure 4. Distribution of cross-sectional velocity by equal distance method

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图 5 两种积分方法流量测量示值误差

Figure 5. Measurement error in flow meter readings using two integration methods

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表 1 两种积分方法的测量点数量和位置

Table 1. Number and position of measurement points by two integration methods

等面积法测点数量及位置					等距离法测点数量及位置
测量点	单一直径测量点数及测量点位置				测量点	单一直径测量点数及测量点位置
测量点	4	6	8	10	测量点	4	6	8	10
1	0.067	0.044	0.033	0.026	1	0.167	0.125	0.100	0.083
2	0.250	0.146	0.105	0.082	2	0.333	0.250	0.200	0.167
3	0.750	0.294	0.195	0.145	3	0.667	0.375	0.300	0.250
4	0.933	0.706	0.321	0.227	4	0.833	0.625	0.400	0.333
5		0.854	0.679	0.334	5		0.750	0.600	0.417
6		0.956	0.805	0.656	6		0.875	0.700	0.583
7			0.895	0.773	7			0.800	0.667
8			0.967	0.855	8			0.900	0.750
9				0.918	9				0.833
10				0.974	10				0.917

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表 2 实验中两种积分方法测量点位置

Table 2. Measurement point locations for the two integration methods in the experiment /mm

测量点位置		1	2	3	4	5	6
测量点距径向起点距离	等面积法	17.6	58.4	117.6	282.4	341.6	382.4
测量点距径向起点距离	等距离法	50	100	150	250	300	350

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