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 warning method and system solve the problems of lagging operation and adjustment of the desulfurization system, effectively eliminate the excessive discharge of sulfur dioxide, and improve the operating economy.

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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Embodiment 1

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

[0036] Step S1: Detect the coal supply in real time and obtain the current coal supply

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

[0038] Step S2: Obtain the previous coal supply

[0039] The current coal supply is delayed by the preset time t to form the previous moment t 0 The amount of coal supplied is the previous coal supply; among them, t 0 = t 1 -t.

[0040]In this embodiment, the preset time t is set to 10 seconds; in other embodiments, an appropriate preset time t may 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 time

[0042] Specifically, ...

Embodiment 2

[0048] Such as figure 2 As shown, this embodiment provides a method to prevent desulfurization flue gas SO 2 The early warning system for excessive emissions includes: a real-time detection module for coal supply, a data processing module and an alarm module 6. The real-time detection module for coal supply detects the coal supply in real time and sends the acquired coal supply signal to the data processing module. 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 gives an alarm when receiving the early warning signal.

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

[0050] In this embodiment, two coal supply real-time detection modules are set, that is, the firs...

Embodiment 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 supply was 126t / h, the slurry supply was 2.6t / h, and the SO 2 The concentration is 28mg / Nm 3 At 15:44:40, the amount of coal burned increased sharply to 153t / h, which triggered an early warning of a sharp increase in coal amount. The operator immediately increased the amount of slurry supplied to 15t / h, and exported SO 4 minutes later. 2 The concentration rose to a peak of 33mg / Nm 3 , there is no excessive discharge; the monitoring results are as in 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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