Early warning method and early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of early warning method and early warning system

An early warning system and SO2 technology, applied in the field of flue gas desulfurization, can solve the problems of lag in the operation and adjustment of the desulfurization system, and achieve the effects of improving the operation economy, solving the lag, and preventing excessive emissions.

Active Publication Date: 2020-09-01
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method to prevent desulfurization flue gas SO 2 The early warning method, early warning system and application of excessive discharge. The early war

Method used

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  • Early warning method and early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of early warning method and early warning system
  • Early warning method and early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of early warning method and early warning system
  • Early warning method and early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of early warning method and early warning system

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Example Embodiment

[0034] Example 1

[0035] This embodiment provides a method for preventing SO of desulfurization flue gas 2 The early warning method of excessive emissions, the steps are as follows:

[0036] Step S1: real-time detection of coal feed quantity, and obtain current coal feed quantity

[0037] Specifically, the conventional coal feed quantity detection device is used to detect the coal feed quantity of the boiler in real time to obtain the first time t 1 The coal supply data of is the current coal supply.

[0038] Step S2: Obtain the prior coal supply

[0039] The current coal feed amount lags the preset time t to form the previous time t 0 The coal feed quantity is the previous coal feed quantity; where t 0 = T 1 -t.

[0040] In this embodiment, the preset time t is set to 10 seconds; in other embodiments, a suitable preset time t can be set according to actual conditions.

[0041] Step S3: Obtain the difference of the previous coal supply before the current coal supply exceeds the preset ti...

Example Embodiment

[0047] Example 2

[0048] Such as figure 2 As shown, the present embodiment provides a method for preventing desulfurization flue gas SO 2 The early warning system for excessive emissions includes: a real-time coal supply detection module, a data processing module and an alarm module 6. The coal supply real-time detection module detects coal supply in real time and sends the obtained coal supply signal to the data processing module for data processing. The module obtains the difference of the previous coal supply before the current coal supply exceeds the preset time, and sends an early warning signal to the alarm module 6 when the difference is greater than the preset value, and the alarm module 6 alarms when it receives the early warning signal.

[0049] The specific structure of each of the above modules is not strictly limited, and an appropriate structure can be selected according to their respective functions.

[0050] In this embodiment, two real-time coal supply detection mo...

Example Embodiment

[0056] Example 3

[0057] This embodiment is an application example of the early warning method of embodiment 1 and the early warning system of embodiment 2.

[0058] On January 16, 2019, at 15:43:30, the coal feed rate was 126t / h, the slurry feed rate was 2.6t / h, and the export SO 2 The concentration is 28mg / Nm 3 , 15:44:40, the coal burning volume increased sharply to 153t / h, triggering an early warning of the rapid increase in coal volume, the operator immediately increased the slurry supply volume to 15t / h, and the SO was exported after 4 minutes 2 Concentration rises to a peak value of 33mg / Nm 3 , There is no excessive discharge; the monitoring result is as 3.

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Abstract

The invention provides an early warning method and an early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of the early warning method and the early warning system. The early warning method comprises the steps that S1 the coal feeding amount is detected in real time, and the current coal feeding amount is obtained; S2 the difference value ofthe previous coal feeding amount before the current coal feeding amount exceeds the preset time is obtained; S3 an alarm is given when the difference value is greater than a preset value, wherein theearly warning system comprises a coal feeding amount real-time detection module, a data processing module and an alarm module. The coal feeding amount real-time detection module detects the coal feeding amount in real time and sends an obtained coal feeding amount signal to the data processing module. The data processing module obtains the difference value of the previous coal feeding amount before the current coal feeding amount exceeds the preset time and sends an early warning signal to the alarm module when the difference value is larger than the preset value. The alarm module gives an alarm when receiving the early warning signal. According to the early warning method and system, the problems of operation adjustment lag and the like of a desulfurization system are solved, excessive emission of sulfur dioxide is effectively avoided, and the operation economy is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to a method for preventing desulfurization flue gas SO 2 Early warning method, early warning system and application of excessive discharge. Background technique [0002] At present, thermal power plants emit a large amount of smoke during operation, which brings serious harm to the ecological environment and has a serious impact on the normal life and health of social groups. The centralized control operation watchman of the thermal power plant uses the flue gas desulfurization system DCS to detect the three major pollutants in the flue gas, SO 2 , NO x , Particles are monitored and adjusted in real time to ensure that the concentration of pollutants meets environmental protection requirements. The pollutant parameters are transmitted to the environmental protection department in real time through the continuous flue gas emission online monitoring system, which f...

Claims

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Application Information

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IPC IPC(8): G08B21/14G08B31/00B01D53/50B01D53/80
CPCG08B21/14G08B31/00B01D53/502B01D53/80B01D2251/404B01D2251/606B01D2258/0283
Inventor 李朝袁明宇陈磊张锐白琴海志民李成陈旭焦小花
Owner DATANG ENVIRONMENT IND GRP
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