Synchronous sampling device for SO3 and CPM in stationary pollution source flue gas

Abstract

The invention provides a synchronous sampling device for SO3 and CPM in stationary pollution source flue gas. The device comprises a front-section flue gas gun, a middle-section flue gas gun, a tail-section flue gas gun, a sampling main machine, a quartz filter, a sampling head heater, a quartz glass lining pipe, an SO3 quartz condensation pipe, a CPM quartz condensation pipe, a middle-section flue gas gun heater, a tail-section flue gas gun heater, an air cooling device, a water cooling device, a CPM filter and a condensation pipe outlet flue gas temperature sensor. According to the synchronous sampling device of the invention, the quartz filter is arranged at the front end of the sampling device, so that filterable particulate matters are captured at the foremost end of the sampling device; the flue gas guns do not need to be washed, and only a sampling nozzle needs to be cleaned, and therefore, cleaning operation after sampling is simplified. All the components are modularized, and therefore, the on-site connection / disassembly of the sampling device is easier and more convenient, and the carrying of the sampling device is convenient.

Description

technical field [0001] The invention belongs to the technical field of sampling and monitoring of unconventional pollutants in flue gas from fixed pollution sources, and in particular relates to a SO 3 Synchronous sampling device with CPM. Background technique [0002] SO 3 Condensable particulate matter (CPM, Condensable Particulate Matter) is an unconventional pollutant in the flue gas of stationary pollution sources. It usually exists in the flue gas of stationary pollution sources in the form of aerosols and is extremely difficult to remove. In my country, conventional pollutants in flue gas from fixed pollution sources, such as particulate matter and SO 2 , NO x Remarkable achievements have been made in emission control, but for SO 3 Governance and removal related to CPM is still in its infancy. [0003] At present, SO in flue gas from stationary pollution sources in my country 3 The collection methods are mainly isopropanol absorption method and controlled conden...

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Problems solved by technology

[0005] 1. In the controlled condensation method, the particle filter membrane is placed behind the sampling gun and outside the flue, which belongs to the external filtration method. This method will cause a large amount of filterable particles to adhere to the sampling gun, and it is very difficult to clean after sampling; isopropanol absorbs Because the method is suitable for sulfuric acid industrial tail gas and does not need to install a filter membrane, it is not suitable for dusty flue gas

[0006] 2. Low degree of equipment integration and insufficient portability

Whether it is DL / T 1990-2019, GB / T38685-2020, EPA8 or EPA8A, it is necessary to carry multiple absorption bottles for sampling, and there are many connecting pipelines between components, and it is necessary to carry an ice bath or temperature-controlled water bath , equipped with ice water or hot water, especially the imported equipment produced according to the EPA8 or EPA8A standard is bulky and heavy, and usually the flue gas outlets of enterprises are located at a high position, which causes inconvenience in on-site transportation and long time for instrument preparation

[0007] 3. On-site operation is cumbersome

The EPA method 202 measurement standard adopts the external filtration method. This method will cause a large amount of particulate matter to adhere to the sampling gun, and it is very difficult to clean after sampling. If the weight of the particulate matter needs to be tested, it will cause a certain deviation

[0010] 2. Low degree of equipment integration and insufficient portability

The EPA method 202 measurement standard needs to carry 4 absorption bottles for sampling, and there are many connecting pipelines between components, and it is necessary to carry an ice bath box, a circulating water bath box, a circulating water pump, circulating water, etc., especially according to the EPA method 202 measurement standard Standard production of imported equipment is large in size and weight. Usually, the flue gas outlets of enterprises are located at a high position, which makes it inconvenient to carry on site and takes a long time to prepare the equipment.

[0011] 3. On-site operation is cumbersome

When the above method is operated on-site, the solution needs to be configured on-site. After the sampling is completed, the solution is processed and collected, and the absorption bottle is cleaned many times. The preparation time and operation time are relatively long.

[0012] 4. Poor temperature control effect

According to standard requirements, the temperature of the CPM filter and the first two absorption bottles needs to be controlled at close to 30°C. At present, the CPM sampling equipment cannot control the temperature well to meet this requirement, and the absorption bottle is greatly affected by the ambient temperature and ice bath control. Time manual adjustment

[0013] Other than that, SO 3 Sampling with CPM requires two sets of equipment, which cannot be shared, and the transportation, connection and operation of the equipment are extremely cumbersome and complicated

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