CN104568526A - Combined fume sampling device - Google Patents

Abstract

The invention provides a combined flue gas sampling device, which is mainly composed of a plug 3, a main sampling pipe 1 and an interface pipe 4, and the first part is sequentially connected by threads, and the interface pipe is provided with a stopper 5. In addition, it also includes a connecting Tube 2, used to connect two main sampling tubes to increase the length of the sampling device. The invention is simple in structure, easy to assemble, easy to carry, and has good sealing performance, and effectively solves the problem of fixing the device during the measurement process, preventing it from falling off in the flue. In addition, the device of the invention is suitable for different sizes of Flue, the number of main sampling pipes and connecting pipes can also be changed freely according to the size of the flue and test requirements.

Description

A combined flue gas sampling device

technical field

The invention belongs to the field of flue gas analysis of power plant boilers, in particular to a combined flue gas sampling device, which is suitable for high-parameter and large-capacity boilers with complex gas flow changes in power plants.

Background technique

With the development of boilers in power plants, it is necessary to analyze parameters such as flue gas volume, oxygen content and gas composition of large-scale and supercritical units. How to accurately measure the above parameters is a difficult problem. At present, most of the sampling devices have a single structure, cannot be disassembled, Inconvenient to carry, poor measurement accuracy and many other problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a combined flue gas sampling device to realize the sampling of flue gas in high-parameter and large-capacity boilers.

In order to solve the above technical problems, the technical solutions provided by the invention are as follows:

A combined flue gas sampling device, characterized in that the device includes a mouthpiece 4 with a baffle 5 at the upper end, several detachably connected main sampling pipes 1 communicated with the mouthpiece 4, and a main sampling pipe 1 arranged on the main sampling pipe. The plug 3 at the end of the pipe 1 has a sampling hole 6 on the side wall of each main sampling pipe 1 .

Further, both ends of the sampling tube 1 are provided with threads, and two adjacent sections of the main sampling tube 1 are connected by connecting pipes 2 with threads at both ends.

Further, the plug 3 is threaded to the end of the main sampling tube 1 and between the main sampling tube 1 and the mouthpiece 4 .

Furthermore, the baffle plate 5 is a circular steel plate. the

Beneficial effects of the present invention:

The present invention is simple in structure, convenient in combination, low in cost and easy to carry. The device of the present invention has good sealing performance, and effectively solves the fixing problem of the device in the measurement process, preventing it from falling off in the flue. In addition, the device of the present invention The device is suitable for flue ducts of different sizes, and the number of main sampling pipes and connecting pipes can be freely changed according to flue size and test requirements.

Description of drawings

The overall structure schematic diagram of Fig. 1 the present invention;

Fig. 2 main sampling tube front view of the present invention;

Fig. 3 is the front view of the connecting pipe of the present invention;

Fig. 4 plug front view of the present invention;

Figure 5a is a front view of the mouthpiece of the present invention;

Figure 5b is a left view of the mouthpiece of the present invention;

Fig. 6 is a schematic diagram of the overall structure of a plurality of main sampling tubes assembled in the present invention;

Fig. 7 is a schematic diagram of the installation position of the present invention during specific implementation;

Fig. 8 is a partial enlarged view of the installation position of the present invention during specific implementation.

In the picture:

1. Main sampling pipe 2. Connecting pipe 3. Plug 4. Interface pipe 5. Baffle plate 6. Sampling hole.

Detailed ways

The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the present invention provides a combined flue gas sampling device, which is mainly composed of a plug 3, a main sampling pipe 1 and a mouthpiece 4;

Wherein, the main sampling pipe 1 and the interface pipe 4 are tubular structures with openings at both ends, both ends of the main sampling pipe 1 are processed with internal threads, and the wall of the main sampling pipe 1 is provided with a sampling hole 6;

The connecting end of the mouthpiece 4 is processed with external threads, and the circumference of the mouthpiece 4 is welded with a baffle 5, which is used to fix the sampling device at the sampling port of the flue measuring point to prevent it from slipping into the In the flue, in addition, the baffle plate 5 can also cover the gap between the sampling device and the sampling port of the flue measuring point to prevent the leakage of the flue gas and play an effective sealing role;

The connecting end of the plug 3 is processed with an external thread; the plug 3, the main sampling pipe 1 and the mouthpiece 4 are sequentially connected through thread combination.

As shown in Figure 6, the sampling device also includes a connecting pipe. The connecting pipe 2 is a tubular structure with two ends open, and both ends are processed with external threads. When the flue diameter is large in the actual measurement process, it is necessary to extend the sampling time. The length of the device is sufficient to meet the needs of sampling measurement. At this time, the connecting pipe 2 is connected and installed between the two main sampling pipes 1 to increase the length of the sampling device.

As shown in Figure 7 and Figure 8, in the specific implementation process, the main sampling pipe 1 of the sampling device of the present invention is inserted into the sampling port of the flue, and is fixed on the flue through the baffle plate 5 on the mouthpiece 4 of the sampling device. On the outer edge of the sampling port, the interface of the interface pipe is connected to the flue gas analyzer through a rubber tube. The flue gas analyzer has its own exhaust pump, which can extract the flue gas in the flue, so that the flue gas at the measurement point of the flue The gas enters the sampling device through the sampling hole 6 for sampling, and then enters the flue gas analyzer for subsequent measurement and analysis.

The above-mentioned specific embodiments are only used to illustrate the present invention, wherein the structure and connection mode of each component can be changed, and any equivalent transformation and improvement carried out on the basis of the technical solution of the present invention should not be excluded from the present invention. outside the scope of protection of the invention.

Claims (4)

1. A combined flue gas sampling device, characterized in that the device comprises a mouthpiece (4) with a baffle (5) at the upper end, several sections of detachably connected master pipes communicated with the mouthpiece (4). The sampling tube (1) and the plug (3) arranged at the end of the main sampling tube (1), each section of the main sampling tube (1) has a sampling hole (6) on the side wall. 2. A combined flue gas sampling device as claimed in claim 1, characterized in that, the two ends of the sampling pipe (1) are provided with threads, and two adjacent main sampling pipes (1) are threaded at both ends. The connecting pipe (2) is connected. 3. A combined flue gas sampling device as claimed in claim 1, characterized in that, between the plug (3) and the end of the main sampling pipe (1) and between the main sampling pipe (1) and the mouthpiece (4) All are threaded connections. 4. A combined flue gas sampling device according to any one of claims 1-3, characterized in that the baffle (5) is a circular steel plate.