CN209821059U - On-site smoke detection device based on spectral technology - Google Patents

Abstract

The utility model provides an on-site flue gas detection device based on spectrum technology, which includes a light source and a detector. In the flue, there is a flue gas inlet; a filter is arranged in the flue for filtering the flue gas entering from the flue gas inlet; the gas chamber is arranged on the light path between the light source and the light reflection unit, The flue gas filtered by the filter enters the gas chamber; isolation components are respectively arranged at both ends of the gas chamber, and the measurement light is adapted to pass through the isolation components; a pump, under the action of the pump , the flue gas in the flue passes through the flue gas inlet, the filter and the gas chamber in sequence. The utility model has the advantages of simple structure, high monitoring precision and the like.

Description

On-site smoke detection device based on spectral technology

technical field

The utility model relates to gas monitoring, in particular to an on-site smoke detection device based on spectrum technology.

Background technique

In recent years, more and more attention has been paid to the pollution caused by flue gas emissions from waste incineration, thermal power generation, and iron and steel metallurgy, and the toxic and harmful gases emitted by online flue gas are particularly important. In this regard, a continuous monitoring system for flue gas emission has emerged as the times require. It is generally based on the quantitative calculation of the content of gaseous pollutants in the flue gas under dry flue gas. However, the flue gas generally has a certain humidity, and the accuracy of its measurement directly affects the total amount of pollutant discharge, the calculation of pollutant concentration and the evaluation of the efficiency of the flue gas purification system.

At present, the detection method of the humidity in the flue is: the use of resistance capacitance, dry and wet oxygen method and other principles to detect humidity, this method has many shortcomings, such as: low detection accuracy, easy to be damaged by the impact of particles in the flue.

Utility model content

In order to solve the shortcomings in the above-mentioned prior art solutions, the utility model provides an on-site smoke detection device based on spectrum technology with simple structure, high monitoring precision and integration.

The purpose of this utility model is achieved by the following technical solutions:

An on-site smoke detection device based on spectral technology, the on-site smoke detection device based on spectral technology includes a light source and a detector, the wavelength of the measurement light emitted by the light source is the same as the wavelength of the gas to be measured in the smoke Corresponding to the absorption spectrum; the in-situ smoke detection device based on spectral technology further includes:

a light reflection unit adapted to be disposed in the flue for reflecting the measurement light to the detector;

a probe, the probe is arranged in the flue and has a flue gas inlet;

a filter, the filter is arranged in the flue, and is used to filter the flue gas entering from the flue gas inlet;

a gas chamber, the gas chamber is arranged on the optical path between the light source and the light reflection unit, and the smoke filtered by the filter enters the gas chamber;

isolation parts, the isolation parts are respectively arranged at both ends of the gas chamber, and the measurement light is adapted to pass through the isolation parts;

A pump, under the action of the pump, the flue gas in the flue passes through the flue gas inlet, the filter and the gas chamber in sequence.

Compared with the prior art, the utility model has the beneficial effects of:

1. Integrated design; light source, detector, gas chamber, light reflection unit and filter are connected together through cylindrical parts, compact structure, easy disassembly and maintenance;

2. Spectral analysis technology has the advantages of short time consumption, low power consumption, and high monitoring accuracy;

3. When installing the detection device of this patent application, it is only necessary to open a hole on the flue, which is simple and convenient.

Description of drawings

With reference to the accompanying drawings, the disclosure of the present utility model will become easier to understand. Those skilled in the art can easily understand that: these drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the protection scope of the utility model. In the picture:

Fig. 1 is a schematic structural diagram of an on-site smoke detection device based on spectrum technology according to Embodiment 1 of the present utility model.

Detailed ways

Figure 1 and the following description describe an alternative embodiment of the invention to teach those skilled in the art how to implement and reproduce the invention. In order to teach the technical solution of the utility model, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that modifications or replacements from these embodiments will fall within the scope of the present invention. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present invention. Accordingly, the present invention is not limited to the alternative embodiments described below, but only by the claims and their equivalents.

Example 1:

Fig. 1 schematically shows the structural diagram of the on-site smoke detection device based on spectrum technology in Embodiment 1 of the present invention. As shown in Fig. 1, the on-site smoke detection device based on spectrum technology include:

A light source 2, such as a tunable semiconductor laser, the wavelength of the measurement light emitted by the light source 2 corresponds to the absorption line of the gas to be measured in the flue gas;

a detector 1, the detector 1 is used to receive the measurement light absorbed by the gas to be measured in the gas chamber 6;

An analysis unit, the analysis unit utilizes absorption spectroscopy technology to process the signal transmitted by the detector, thereby knowing the content of the gas to be measured in the flue; the analysis unit is a prior art in the field, and the specific working method will not be repeated here;

A light reflection unit 8, the light reflection unit 8 is adapted to be arranged in the flue, for reflecting the measurement light to the detector 1;

A probe 10, the probe 10 is arranged in the flue and has a flue gas inlet;

a filter 9, the filter 9 is arranged in the flue, and is used to filter the flue gas entering from the flue gas inlet;

A gas chamber 6, the gas chamber 6 is arranged on the light path between the light source 2 and the light reflection unit 8, and the smoke filtered by the filter enters the gas chamber;

Isolation components 4, 7, such as glass slides that can transmit measurement light, are respectively arranged at both ends of the gas chamber, and the measurement light is suitable for passing through the isolation components; through isolation, the outside world Air cannot enter the gas chamber, while the flue gas in the flue cannot directly enter the gas chamber;

A pump 11, such as a jet pump, under the action of the pump, the flue gas in the flue passes through the flue gas inlet, the filter and the gas chamber in sequence.

Example 2:

An application example of an on-site smoke detection device based on spectrum technology according to Embodiment 1 of the utility model.

As shown in Figure 1, in this application example, the light reflection unit 8, the filter 9 and the first isolation member 7 are arranged in the first cylindrical member 12, and the flue gas passing through the filter 9 flows from the light reflection unit 8 and the first isolation member 7. The gap between the first cylindrical parts 12 enters the gas chamber 6; the light reflection unit 8 and the gas chamber 6 are isolated by the first isolation part 7, and the first isolation part 7 adopts an obliquely arranged glass slide, The glass slide passes through the measurement light, and the light reflection unit 8 and the first isolation member 7 form a closed space to prevent contamination of the light reflection unit by external particles and the like; the gas chamber 6 is formed in the second cylindrical member 13, and the second One end of the cylindrical part 13 is connected with the first cylindrical part 12; the other end of the second cylindrical part 13 is connected with the third cylindrical part 14; The measuring light is arranged in the third cylindrical part 14 to isolate the gas chamber 6 from the inside of the third cylindrical part 14; one end of the first flange 16 is connected with the third cylindrical part 14, and the other One end is connected to the fourth cylindrical part 15; the light source 2 and the detector 1 are arranged in the fourth cylindrical part 15; there is a flexible seal between the first flange 16 and the fourth cylindrical part 15, At least three connecting pieces are used to connect the first flange and the fourth cylindrical part; the second flange 5 is fixed on the flue; the light reflection unit 8, the filter 9 and the gas chamber 6 pass through the The second flange 5 extends into the flue; the light incident end of the first lens 3 is a plane, and the light exit end is a curved surface; the measuring light enters the gas chamber after passing through the first lens 3 6; the light incident end of the second lens 18 is a curved surface, and the light exit end is a plane; the measurement light emitted from the gas chamber 6 passes through the second lens 18 and is received by the detector 1.

Claims (10)

1. An on-site smoke detection device based on spectral technology, the on-site smoke detection device based on spectral technology includes a light source and a detector, the wavelength of the measurement light emitted by the light source is the same as that in the smoke to be measured The absorption line of the gas corresponds; it is characterized in that: the on-site smoke detection device based on spectral technology further includes: a light reflection unit adapted to be disposed in the flue for reflecting the measurement light to the detector; a probe, the probe is arranged in the flue and has a flue gas inlet; a filter, the filter is arranged in the flue, and is used to filter the flue gas entering from the flue gas inlet; a gas chamber, the gas chamber is arranged on the optical path between the light source and the light reflection unit, and the smoke filtered by the filter enters the gas chamber; isolation parts, the isolation parts are respectively arranged at both ends of the gas chamber, and the measurement light is adapted to pass through the isolation parts; A pump, under the action of the pump, the flue gas in the flue passes through the flue gas inlet, the filter and the gas chamber in sequence. 2. The on-site smoke detection device based on spectrum technology according to claim 1, characterized in that: the pump is a jet pump, which is arranged at the outlet of the gas chamber. 3. The on-site smoke detection device based on spectrum technology according to claim 1, characterized in that: the light reflection unit and the gas chamber are isolated by a first isolation member. 4. The on-site smoke detection device based on spectrum technology according to claim 1, characterized in that: the light reflection unit, the filter and the first isolation part are arranged in the first cylindrical part, passing through the filter The flue gas of the device enters the gas chamber from between the light reflection unit and the first cylindrical part. 5. The on-site smoke detection device based on spectrum technology according to claim 4, characterized in that: the gas chamber is formed in the second cylindrical part, and one end of the second cylindrical part is connected to the first A cylindrical part is connected. 6. The on-site smoke detection device based on spectral technology according to claim 5, characterized in that: the on-site smoke detection device based on spectral technology further comprises: a third cylindrical part, the other end of the second cylindrical part is connected to the third cylindrical part; A second isolation member, which is disposed inside the third cylindrical member, isolates the gas chamber from the inside of the third cylindrical member. 7. The on-site smoke detection device based on spectral technology according to claim 6, characterized in that: the on-site smoke detection device based on spectral technology further comprises: a first flange, one end of the first flange is connected to the third cylindrical part, and the other end is connected to the fourth cylindrical part; A fourth cylindrical part, the light source and the detector are arranged in the fourth cylindrical part. 8. The on-site smoke detection device based on spectrum technology according to claim 7, characterized in that: there is a flexible seal between the first flange and the fourth cylindrical part, and at least three connecting parts are used for connecting the first flange and the fourth cylindrical member. 9. The on-site smoke detection device based on spectral technology according to claim 1, characterized in that: the on-site smoke detection device based on spectral technology further comprises: The second flange is fixed on the flue; the light reflection unit, the filter and the gas pass through the second flange and extend into the flue. 10. The on-site smoke detection device based on spectral technology according to claim 1, characterized in that: the on-site smoke detection device based on spectral technology further comprises: A first lens, the light incident end of the first lens is a plane, and the light exit end is a curved surface; the measurement light enters the gas chamber after passing through the first lens; The second lens, the light incident end of the second lens is a curved surface, and the light output end is a plane; the measurement light emitted from the gas chamber passes through the second lens and is received by the detector.