Sampling tube and flue gas detecting device and flue assembly using the sampling tube

Abstract

The invention relates to a sampling tube and a flue gas detecting device and a flue assembly using the sampling tube. The flue gas detecting device comprises a sampling tube fixedly inserted into theflue radially along the flue and a flue gas detecting unit for detecting the flue gas in the sampling tube, wherein the inner end of the sampling tube for inserting into the flue is a sealing end, thefront side of the sampling tube is a windward side for the flow direction of the flue gas, and the rear side is a corresponding leeward side, wherein a gas inlet is arranged on the windward side pipewall of the sampling tube, a gas outlet is arranged on the leeward side pipe wall of the sampling tube, the sampling tube is provided with an inclined guiding surface arranged toward the front, and the inclined guiding surface gradually extends obliquely rearward toward the gas outlet in the longitudinal direction of the sampling tube to guide the smoke in the sampling tube to flow to the gas outlet. The gas inlet, the gas outlet and the inclined guiding surface on the sampling tube are used to make the smoke entering the sampling tube exhausted from the gas outlet with the flue gas flow, without being accumulated in the sampling tube, thereby ensuring measurement accuracy.

Description

technical field [0001] The invention relates to a sampling pipe, a smoke detection device and a flue assembly using the sampling pipe. Background technique [0002] Coal-fired power generation will produce and emit a large amount of combustion products, including CO, SO2, SO3, NO X And other gases are extremely harmful to the ecological environment and human body. In the operation of the boiler, in order to understand the degree of incomplete combustion in the furnace, it is necessary to know the various components in the flue gas, so as to adjust the combustion, and save a lot of production costs for the energy saving and emission reduction of coal-fired power plants and the safe and efficient operation of equipment. [0003] The sampling method is one of the widely used methods at present. Sampling devices are needed in the process of taking samples for detection, such as the flue gas sampling device disclosed in the Chinese invention patent application with the applic...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a flue gas detection device to solve the technical problem that the existing sampling pipe adopts a metal mesh layer to filter smoke and dust, which is prone to clogging of air intake holes and leads to low sampling accuracy; at the same time, the present invention also provides a sampling pipe, In order to solve the technical problem that the existing sampling pipe uses a metal mesh layer to filter smoke and dust, which is prone to blockage of the air intake hole and leads to low sampling accuracy; at the same time, the invention also provides a flue assembly using the above-mentioned smoke detection device

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