CN215865982U

CN215865982U - Sampling device for oxygen content measurement sample gas of high-temperature high-pressure industrial boiler

Info

Publication number: CN215865982U
Application number: CN202120173069.XU
Authority: CN
Inventors: 郑伟
Original assignee: Xi'an Gfirst Environmental Protection Technology Co ltd
Current assignee: Xi'an Gfirst Environmental Protection Technology Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-02-18
Anticipated expiration: 2031-01-22

Abstract

The utility model belongs to the technical field of flue gas pipelines, and discloses a sampling device for oxygen content measurement sample gas of a high-temperature high-pressure industrial boiler. The sensor is directly inserted into the flue to be installed on the extended pipeline instead of being vertically installed on the extended pipeline, because the smoke pressure is positive pressure, the general pressure is more than 500Pa, although the installation pipeline is exposed out of the flue by 70cm, under the positive pressure environment, the smoke still diffuses into the whole flue and continuously and circularly flows, and the smoke is not changed due to the extension of the installation pipeline. The pipeline of extension is located under natural environment, and the outside temperature of pipeline is ambient temperature, utilizes the inside and outside temperature difference of pipeline, relies on the inside flue gas temperature of heat exchange's principle to reduce the flue gas temperature of pipeline, makes the sensor contact's flue gas temperature greatly reduced to the life of extension measuring element.

Description

Sampling device for oxygen content measurement sample gas of high-temperature high-pressure industrial boiler

Technical Field

The utility model belongs to the technical field of flue gas pipelines, and particularly relates to a sampling device for oxygen content measurement sample gas of a high-temperature high-pressure industrial boiler.

Background

At present: the zirconia oxygen analyzer is an important device for measuring the oxygen content of flue gas after combustion of various industrial kilns such as boilers, heating furnaces, coke ovens and the like, and finds the optimal proportion balance point of fuel and oxygen combustion through the analysis and control of the oxygen content of the flue gas, thereby realizing the final purposes of energy conservation, emission reduction and consumption reduction.

The zirconium oxide belongs to an in-situ instrument, and an oxygen probe (sensor) is directly inserted into a flue of an industrial kiln in a flange connection and direct installation mode. The smoke temperature of most industrial kilns is between 100 ℃ and 500 ℃, the pressure is negative pressure, when the smoke temperature exceeds 600 ℃, the upper limit of the heat resistance of the zirconia sensor is reached, and the measuring element of the zirconia sensor is rapidly aged and has a shorter service life than normal 1/3 when the measuring element is in a high-temperature environment for a long time.

The existing zirconium oxide sensor is installed by welding a furnace wall flange on a flue and then connecting the furnace wall flange with a matching flange of the sensor through bolts and nuts, and is simple and practical. But the temperature resistant problem of sensor measuring element when current mounting means can't solve the flue gas temperature and be higher than 600 ℃. The shell material of sensor itself is stainless steel, and measuring element is wrapped up and is protected by the stainless steel shell, and the heat passes through the heat-conduction mode, makes measuring element be in under the high temperature environment equally, can't solve the problem that measuring element life-span is ageing with higher speed, has improved customer's use cost, and the frequency of changing the sensor promptly obviously accelerates. Generally, under ideal environmental temperature, the sensor is replaced once in 3-4 years, which is changed into once in about 1 year, and the use cost is multiplied.

Through the above analysis, the problems and defects of the prior art are as follows: the existing installation mode can not solve the temperature resistance problem of a sensor measuring element when the temperature of flue gas is higher than 600 ℃; the problem of accelerated aging of the service life of the measuring element cannot be solved, the use cost of a customer is improved, namely the frequency of replacing the sensor is obviously accelerated, and the use cost is multiplied.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a sampling device for oxygen content measurement sample gas of a high-temperature high-pressure industrial boiler.

The utility model is realized in this way, a sampling device for oxygen content measurement sample gas of high-temperature high-pressure industrial boiler is provided with:

a sensor;

the sensor comprises a gas taking device, and a sealing gasket, an oxygen detector and a junction box are sequentially arranged above the gas taking device.

Further, the installation pipeline of the sensor is lengthened by 40 cm.

Further, the sensor is vertically mounted on the elongated mounting tube.

Further, the elongated mounting duct is exposed about 70cm outside the flue.

By combining all the technical schemes, the utility model has the advantages and positive effects that: the sensor is directly inserted into the flue and is installed on the extended pipeline instead of being vertically installed on the extended pipeline, and the temperature outside the pipeline is the ambient temperature, the temperature difference inside and outside the pipeline is utilized, the temperature of the flue gas inside the pipeline is reduced by the heat exchange principle, and the temperature of the flue gas contacted with the sensor is greatly reduced, so that the service life of a measuring element is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a sampling device for oxygen content measurement sample gas of a high-temperature high-pressure industrial boiler provided by an embodiment of the utility model;

in the figure: 1. a sensor; 2. a gas taking device; 3. a gasket; 4. an oxygen detector; 5. a junction box; 6. taking a gas pipe at high temperature; 7. a furnace body flange; 8. a furnace wall; 9. the direction of the flue gas.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Aiming at the problems in the prior art, the utility model provides a sampling device for oxygen content measurement sample gas of a high-temperature high-pressure industrial boiler, and the technical scheme of the utility model is described in detail below by combining the attached drawings.

As shown in fig. 1, the sampling device for oxygen content measurement sample gas of high-temperature high-pressure industrial boiler provided by the embodiment of the utility model is provided with: the sensor 1, the sensor 1 includes gets gas device 2, it has sealed 3, oxygen detector 4, terminal box 5 to set gradually above the device to get gas.

When the high-temperature gas taking sensor is used, a furnace body flange 7 is welded on a flue, the flue is in a vertical state with a furnace wall 8, a flue gas enters a high-temperature gas taking pipe 6 in a vertical direction 9, the length of the high-temperature gas taking pipe 6 is lengthened, the mounting pipe is exposed out of the flue by about 30cm generally, the pipe exposed out of the flue is lengthened by 40cm at present, the mounting pipe is exposed out of the flue by about 70cm, the sensor 1 is vertically mounted on the pipe extended out of the flue, the pressure of the flue gas is positive pressure, the pressure is generally more than 500Pa, although the mounting pipe is exposed out of the flue by 70cm, the flue gas still diffuses into the whole flue under the positive pressure environment and continuously and circularly flows, and the change caused by the extension of the mounting pipe is avoided. The pipeline of extension is located under natural environment, and the outside temperature of pipeline is ambient temperature, utilizes the inside and outside temperature difference of pipeline, relies on the inside flue gas temperature of heat exchange's principle to reduce the flue gas temperature of pipeline, makes the sensor contact's flue gas temperature greatly reduced to the life of extension measuring element.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the utility model, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a high temperature high pressure industrial boiler oxygen content measurement appearance gas sampling device, its characterized in that, high temperature high pressure industrial boiler oxygen content measurement appearance gas sampling device is provided with:

a sensor;

2. The sampling device for oxygen content measurement sample gas of high-temperature high-pressure industrial boiler according to claim 1, characterized in that the installation pipe of the sensor is extended by 40 cm.

3. An oxygen content measuring sample gas sampling device for a high temperature and high pressure industrial boiler as claimed in claim 1, wherein said sensor is vertically mounted on an elongated mounting tube, said elongated mounting tube being exposed to 70cm outside of the flue.