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Method for improving accuracy of automatic monitoring of flue gas emission

An automatic monitoring and emission technology, applied in office automation, volume indication and recording equipment, data processing applications, etc., can solve problems such as instrument blockage, difficulty in measuring flue gas flow rate, and inaccurate flue gas flow measurement, so as to avoid consumption time-consuming effect

Inactive Publication Date: 2019-05-07
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0008] 4) The accuracy of automatic monitoring of flue gas flow is poor, making it difficult to automatically monitor flue gas emissions as the first choice for environmental management data
However, the large-scale flue gas duct of the boiler is affected by the layout. Generally, the straight section is relatively short, and it is difficult to measure the flow velocity of the flue gas duct. In addition, the flow field varies greatly with the load at the flow velocity measurement point, and the dust content in the flue gas is high. The instrument is blocked, Excessive wear and tear, making flue gas flow measurement more difficult
In addition, when the new unit is connected to the management organization after it is put into operation, or the measurement point is changed after the technically upgraded unit is re-operated, there are inevitably problems such as point connection errors, which are difficult to be discovered in the first place. One of the main causes of inaccurate flue gas flow measurement
[0010] Therefore, to solve the problem of inaccurate automatic monitoring of flue gas emissions, the key is to solve the problem of online flue gas flow

Method used

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  • Method for improving accuracy of automatic monitoring of flue gas emission

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , a method to improve the accuracy of automatic monitoring of flue gas emissions, adopting "one machine, one policy" to manage the flue gas flow of the unit, that is, by setting the normal range of flue gas flow for each unit (the flue gas flow is normal The change range is between the minimum value and the maximum value of the normal flue gas flow of the unit in the previous year), when the flue gas flow exceeds the set range during the operation of the unit, the system will automatically send an abnormal alarm to the enterprise, and the enterprise management personnel will receive it. Judging the early warning after the abnormal alarm is received. If the alarm is true, the management personnel should immediately check the cause of the abnormal alarm and eliminate the abnormality. The data needs to be uploaded with relevant certification materials), and submitted to the management agency personnel for review. If the management agency personnel pass the rev...

Embodiment 2

[0027] The normal value of the flue gas flow rate of a million-level coal-fired unit of enterprise A last year was 3923m at most 3 / h, the minimum is 2548m 3 / h, at the beginning of this year, the online monitoring platform set the flue gas flow range as 2548-3923m 3 / h. When the million-level coal-fired unit is running on a certain day, the flue gas flow rate is 1452m in a certain hour 3 / h, the system automatically sends an abnormal alarm. After the enterprise management personnel find the abnormal alarm, they immediately check the cause and find that the flue gas flow meter is blocked, which makes the measurement result too small. The actual flue gas flow rate for this hour is 3289m 3 / h, after the enterprise management personnel cleaned the meter, the meter measurement returned to normal. Finally, the enterprise, in accordance with the data revision regulations on the system, corrected and supplemented the data from the alarm occurrence to the data recovery to normal val...

Embodiment 3

[0029] A certain 600,000-class coal-fired unit of B company last year had a maximum flue gas flow rate of 2373m 3 / h, the minimum is 1496m 3 / h, the online monitoring platform set the flue gas flow range at the beginning of this year as 1496-2373m 3 / h. When the 600,000-class coal-fired unit is running on a certain day, the flue gas flow rate is 1200m in a certain hour 3 / h, the system automatically sends an abnormal alarm. After the enterprise management personnel find the abnormal alarm, they find that the flue gas flow value of the hour is true, and the reason is that the flue gas flow exceeds the set range. The coal-fired unit is controlled to operate at a lower load, and the range of flue gas flow during this special period is 1033-1441m 3 / h. After the enterprise management personnel click to ignore the alarm, they fill in and submit the pop-up reason explanation and modification limit value in turn. The management agency verifies that the situation is true, the conf...

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Abstract

The invention relates to a method for improving accuracy of automatic monitoring of flue gas emission. The method comprises the steps of: setting a normal variation range of flue gas flow for each unit, when the flue gas flow exceeds the set range during an operation process of the unit, a system automatically sending an abnormal warning to an enterprise, an enterprise management personnel judgingthe warning after the abnormal warning is received, if the warning is true, the management personnel should immediately checking for a reason of the abnormal alarm and performing abnormal elimination, carrying out data repair after the elimination, and submitting to a regulatory agency for checking, if the regulatory agency passing the checking, the process over; if the regulatory agency does notpass the checking, he enterprise management personnel need to restart the process; if the abnormal warning is not true, the management personnel clicking ignore, and filling a ignore reason, and needto reset the smoke flow range and submit to the regulatory agency for judging; if the regulatory agency passing the checking, the process over; if the regulatory agency does not pass the checking, the enterprise needs to restart the flow. According to the method for improving the accuracy of the automatic monitoring of the flue gas emission the accuracy of flue gas flow can be effectively improved.

Description

technical field [0001] The invention relates to a management method for monitoring, early warning, and operation and maintenance of flue gas emissions by using the Internet, and in particular to a method for improving the accuracy of automatic monitoring of flue gas emissions. Background technique [0002] 1) The automatic monitoring system for flue gas emission is widely used. [0003] Article 10 of the Measures for the Administration of Automatic Monitoring of Pollution Sources stipulates that the pollutant discharging units included in the automatic monitoring plan of pollution sources shall construct and install automatic monitoring equipment and supporting facilities within the prescribed time limit, and cooperate with the networking of the automatic monitoring system. Article 11 stipulates that new construction, reconstruction, Expansion and technological transformation projects shall construct and install automatic monitoring equipment and supporting facilities in acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F15/06G06Q10/10
Inventor 王诗琴喻江何胜宋广田
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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