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Polymorphic sampling system and method for sulfur trioxide in exhaust of stationary pollution source

A fixed pollution source and sulfur trioxide technology, applied in the field of pollutant detection, can solve the problems of large deviation and inability to distinguish the form of exhaust gas, etc., and achieve the effect of accurate measurement results and low escape rate

Active Publication Date: 2013-12-11
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG +1
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Problems solved by technology

[0005] The present invention aims at the SO in the exhaust gas of the existing fixed pollution source 3 Large deviations in the test protocol and inability to distinguish SO in exhaust gas 3 form, and provide a multi-state sampling system for sulfur trioxide in the exhaust of fixed pollution sources

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  • Polymorphic sampling system and method for sulfur trioxide in exhaust of stationary pollution source
  • Polymorphic sampling system and method for sulfur trioxide in exhaust of stationary pollution source
  • Polymorphic sampling system and method for sulfur trioxide in exhaust of stationary pollution source

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[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0030] In the present invention, sulfur trioxide (SO 3 ) multi-form test, according to the SO in the exhaust 3 form, firstly based on the principle of selective condensation, under exhaust conditions (temperature, humidity, pressure, SO 2 concentration, etc.), the aerosol SO in the exhaust gas is firstly collected by the pre-collector 3 ; Furthermore, the temperature of the exhaust gas is controlled by a water bath or a water bath cycle so that it is reduced to a temperature range lower than the acid dew point and higher than the water dew point. Gaseous SO in the form of aerosol in 3 , thus realizing the aerosol SO 3 with gaseous SO3 collected separately. Among them, the SO collected by the front and rear stage collectors 3 The sum of SO ...

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Abstract

The invention discloses a polymorphic sampling system and method for sulfur trioxide in exhaust of a stationary pollution source. The polymorphic sampling method comprises the following steps: according to the form of SO3 in the exhaust, based on a selective condensation principle, collecting aerosol-state SO3 in the exhaust by adopting a front-stage collector under the temperature of the exhaust; and enabling the temperature of the exhaust flowing in a rear-stage collector to be reduced below an acid dew point through a water bath or water bath circulation so that the original gaseous SO3 under the temperature of the exhaust is transformed into the aerosol-state SO3 to be deposited in the rear-stage collector so as to realize the purpose that the aerosol-state SO3 and the gaseous SO3 are respectively measured. According to the scheme provided by the invention, the aerosol-state SO3 and the gaseous SO3 in the exhaust can be distinguished, and respectively quantified; a proportion of the aerosol-state SO3 to the gaseous SO3 is calculated, and the total concentration of the SO3 can also be measured. The measured concentration of the aerosol-state SO3 and the gaseous SO3 under the temperature of the exhaust provides basic data for researching acid corrosion at the tail of a boiler; meanwhile, the polymorphic sampling system can be applied to detection of SO3 emission concentration of exhaust of other pollution sources.

Description

technical field [0001] The invention relates to pollutant detection technology, in particular to the detection technology of sulfur trioxide in exhaust gas from fixed pollution sources. Background technique [0002] SO in the exhaust of stationary pollution sources 3 The test is an important item for the detection and evaluation of pollutant emissions, as well as the corrosion status of the boiler tail and the evaluation of the acid dew point. In particular, the recent use of waste heat utilization equipment for flue gas from coal-fired boilers has promoted SO 3 testing needs. [0003] U.S. EPA Method8 adopts selective dissolution and absorption method to absorb SO with 80% isopropanol aqueous solution 3 / H 2 SO 4 , with 3%H 2 o 2 Absorb SO 2 . The disadvantage of this method is that the particulate matter is not removed, so that SO 3 The detection value is positive deviation. US NCASI (National Council of the Paper Industry for Air and Stream Improvement, Inc.) M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N1/10G01N1/34G01N21/71
Inventor 陶雷行岳春妹陆骏超陈睿
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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