CN203908822U - Sampling device for collecting flue gas at six points in utility boiler - Google Patents

Abstract

A sampling device for collecting flue gas at six points in a utility boiler consists of pagoda joints, a pipe base and a pipe body, wherein the pipe body consists of six thin iron sampling pipes with equal diameters and different lengths; the six thin iron sampling pipes are distributed at the vertexes and center of a pentagon and mounted in the pipe base with six holes; one of the six thin iron sampling pipes is a straight pipe, and the end parts of the other five thin iron sampling pipes respectively bend outwards by 45 degrees; the pagoda joints are respectively mounted at the end parts of the five thin iron sampling pipes; the other ends of the six thin iron sampling pipes are different in lengths, and can extend into the parts to be measured of boiler flue gas. According to the utility model, flue dust can be prevented from blocking a pipeline, so that the experiment interruption risk is lowered, and the measuring efficiency and precision are improved; operators can work at areas far away from noise and dust, so that the possibility of personal injury is lowered, and the operation is simple and convenient. The sampling device is applicable to the sampling of flue gas through collection in the utility boiler.

Description

A six-point flue gas sampling device for utility boilers

technical field

The utility model relates to a six-point flue gas sampling device for power station boilers, which belongs to the technical field of flue gas collection and processing.

Background technique

In the thermal test of power plant boilers, the measurement and analysis of flue gas components is an important link. The analysis of the flue gas composition at the boiler outlet can be used to calculate the amount of flue gas produced by the boiler. The flue gas composition at the inlet of the air preheater can determine the combustion conditions of the boiler. The flue gas composition at the outlet of the air preheater can be used to calculate the thermal efficiency of the boiler and the air The air leakage rate of the preheater; under today's increasingly severe environmental conditions, the measurement of flue gas components can perform qualitative or quantitative analysis of the pollutant components in the flue gas, which is conducive to reducing the emission of pollutants.

The size of the flue of modern large-scale power plant boilers is relatively large. On the cross-section of the flowing flue gas, there are both inhomogeneous distribution along the space and specificity that changes with time. Therefore, the grid method is often used for multi-point sampling of flue gas. There are two kinds of sampling tubes commonly used in the measurement of flue gas components of power plant boilers: one is a single thin iron tube with only two ends open, one end is inserted into the flue, and the other end is connected to a silicone tube and a flue gas analyzer. The pipe is pulled out step by step according to a certain length, and a set of data is measured at each point to achieve the goal of the entire section grid method. This method is not easy to block the pipe, but the measurement time is long, the workload is large, the manual error is large, and the measurement accuracy is low. The other is also a single thin iron pipe, one end of which is open to connect the silicone pipe and the flue gas analyzer. The pipe body is arranged with several measuring holes according to a certain length. When measuring, it is directly inserted into the flue, and the flue gas is sucked through the small holes on the thin pipe. Mixed into the pipe body, the purpose of the grid method can be achieved, but due to the small diameter of the pipe body, the smoke and dust are easy to block the pipe during measurement, which is easy to affect the measurement accuracy, and in severe cases, the test will be interrupted.

Contents of the invention

The purpose of the utility model is, according to the problems existing in the flue gas sampling of the existing power station boiler, the utility model proposes a six-point flue gas sampling device for the utility boiler.

The technical scheme of the utility model is that the utility model is a six-point flue gas sampling device for a power plant boiler, which is composed of a pagoda joint, a pipe seat and a pipe body. The tube body is composed of six thin round iron sampling tubes with equal diameters and different lengths. The six thin round iron sampling tubes are distributed at the vertices and centers of the pentagon and installed in the six-hole tube holder. The six thin round iron sampling tubes except the center One is a straight tube, and the ends of the other five thin round iron sampling tubes are bent outwards by 45°; and their ends are respectively equipped with pagoda joints, which are convenient for connecting silicone tubes. The other ends of the six thin round iron sampling tubes are of different lengths and can be extended into the part to be measured of the boiler flue gas.

The beneficial effect of the utility model is that the utility model can not only prevent smoke and dust from blocking the pipeline, reduce the risk of test interruption, improve measurement efficiency and accuracy, but also the operator can work away from noise and dust areas, reducing personal injury, and the operation is simple and convenient .

The utility model is suitable for collecting flue gas sampling of power station boilers.

Description of drawings

Fig. 1 is the structural schematic diagram of the six-point collection flue gas sampling device of the utility model utility model;

Figure 2 is an enlarged left view of Figure 1;

In the figure, 1 is the pagoda joint; 2 is the pipe seat; 3 is the sampling tube.

Detailed ways

The specific embodiment of the utility model is shown in Fig. 1 and Fig. 2 .

This embodiment is realized in this way. The six-point collection flue gas sampling device of the power plant boiler in this embodiment includes a pagoda joint 1, a pipe seat 2 and a pipe body. The tube body is composed of six thin round iron sampling tubes with equal diameters and different lengths. There are six pagoda joints 1 and six sampling tubes 3 each; five sampling tubes 3 are distributed at the five vertices of the pentagon, and a root sampling tube 3; six sampling tubes 3 are welded together, pass through the tube base 2, and are welded on the tube base 2; one end of the five sampling tubes 3 on the outside is bent outward at 45°; five sampling tubes with curved ends and Pagoda joints 1 are installed at the ends of the straight sampling pipes in the middle, which can effectively prevent air leakage. The other ends of the six thin round iron sampling tubes are of different lengths and can be extended into the part to be measured of the boiler flue gas.

When in use, the pagoda joint 1 is connected to the silicone tube, and the flue gas flows through six thin iron pipes, the body 3 and the pagoda joint 1, and enters the flue gas preprocessor and the mixing box through the silica gel tube, so as to achieve multi-point extraction in the entire flue section at the same time Flue gas, there will be no missed and false detections. This embodiment can not only prevent smoke and dust from clogging pipes, reduce the risk of test interruption, and improve measurement efficiency and accuracy, but also operators can work away from noise and dust areas, reducing personal injury, and the operation is simple and convenient.

Claims (1)

1. 6 of station boilers gather a flue gas sampling device, it is characterized in that, described device is comprised of pagoda joint, base and body; The thin iron sampling pipe that body is differed by six roots of sensation equal diameter and length forms, the thin iron sampling pipe of the six roots of sensation is distributed in pentagon summit and center, and be arranged in the base in six holes, the thin iron sampling pipe of the six roots of sensation except one, center be straight tube, outwardly-bent 45 ° respectively of the ends of all the other thin round iron sampling pipes of five; And pagoda joint has been installed respectively in their end; The other end of the thin round iron sampling pipe of the six roots of sensation is different in size, can stretch into the detected part of boiler smoke.