CN213456661U

CN213456661U - Sulfur dioxide concentration detection device based on ultraviolet light

Info

Publication number: CN213456661U
Application number: CN202022268928.1U
Authority: CN
Inventors: 杜亚举; 李保生; 张新
Original assignee: Hefei Ftun Optoelectronics Technology Co ltd
Current assignee: Hefei Ftun Optoelectronics Technology Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-06-15
Anticipated expiration: 2030-10-13

Abstract

The utility model discloses a sulfur dioxide concentration detection device based on ultraviolet light, which comprises an ultraviolet light generator, a fluorescence detector and a reaction chamber, wherein the reaction chamber is connected with an air inlet mechanism and an air outlet mechanism, the gas to be detected enters the reaction chamber through the air inlet mechanism, the ultraviolet light emitted by the ultraviolet light generator excites sulfur dioxide in the gas to be detected in the reaction chamber, and the sulfur dioxide generates a fluorescence signal and is detected by the fluorescence detector; the ultraviolet light detector comprises a second lightproof detection chamber and a fluorescence detection component arranged in the second detection chamber, and the first detection chamber and the second detection chamber are respectively connected with the two ends of the reaction chamber in a sealing way; the utility model discloses a sulfur dioxide concentration detection device based on ultraviolet ray detects fast, detects the precision height, and adapts to gaseous detection in the multiple environment.

Description

Sulfur dioxide concentration detection device based on ultraviolet light

Technical Field

The utility model belongs to the detection device field, more specifically the sulfur dioxide concentration detection device based on ultraviolet ray that says so relates to.

Background

Sulfur dioxide is one of the most serious gas pollutants affecting the safety of human life and property due to the largest amount and the widest distribution in the atmosphere, and therefore, the sulfur dioxide content is often used as the main quality index in the quality index of the atmosphere. With the development of science and technology, the gas generated in the atmosphere or in industrial production or work is monitored and detected on line in real time, and the content and emission of sulfur dioxide in the atmosphere are strictly monitored and controlled.

With the research on sulfur dioxide detection by people, the ultraviolet fluorescence method is developed to monitor sulfur dioxide in real time, and the detection precision is high, the detection is rapid and the detection is influenced by the environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sulfur dioxide concentration detection device based on ultraviolet ray, it is quick to detect, and it is high to detect the precision, and adapts to gaseous detection in the multiple environment.

The utility model discloses technical scheme a sulfur dioxide concentration detection device based on ultraviolet ray, including ultraviolet light generator, fluorescence detector and reacting chamber, be connected with air inlet mechanism and air outlet mechanism on the reacting chamber, wait to detect the gas by air inlet mechanism gets into the reacting chamber, and the ultraviolet ray that ultraviolet light generator sent arouses the sulfur dioxide in waiting to detect the gas in the reacting chamber, and sulfur dioxide produces fluorescence signal and is detected by the fluorescence detector; the reaction chamber comprises an opaque cylindrical tube body, the ultraviolet light generator comprises an opaque detection chamber I and an ultraviolet light path component arranged in the detection chamber I, the fluorescence detector comprises an opaque detection chamber II and a fluorescence detection component arranged in the detection chamber II, and the detection chamber I and the detection chamber II are respectively connected to two ends of the reaction chamber in a sealing manner.

Preferably, be fixed with an mounting panel respectively on detecting room one and the detection room two, two the equal detachable of mounting panel is fixed on an mount table, it is right by the both ends of cylindricality body respectively to detect room one and detection room two the cylindricality body is fixed, cylindricality body both ends are arranged respectively detect room one with detect in the room two and be the sealed fixed of adiacticity.

Preferably, ultraviolet light way subassembly is including the light source, lens, light filter one, chopper and the diaphragm that set gradually, the diaphragm is close to cylindricality body side and sets up, be connected with the stabiliser on the light source, the aperture of diaphragm is less than cylindricality body internal diameter, light filter one is interference light filter.

Preferably, the fluorescence detector comprises a condenser and a photomultiplier, which are arranged in sequence, and the photomultiplier receives the fluorescence passing through the condenser and converts the fluorescence into an electric signal.

Preferably, the mechanism of giving vent to anger is including setting up the gas outlet on the reaction chamber, the mechanism of admitting air is including setting up the air inlet on the reaction chamber, the gas treatment mechanism that awaits measuring of intercommunication air inlet and setting up air pump on the air inlet, the gas treatment mechanism that awaits measuring includes the ozone remover.

Preferably, be connected with the sampling pipe in the import of ozone remover, be connected with gas circuit one and gas circuit two in the export of ozone remover, gas circuit one is including setting gradually desicator, flow controller one, flowmeter one at ozone remover rear portion and the double tube that is used for getting rid of hydrocarbon, gas circuit two is including flow controller two and the flowmeter two that set gradually, connect the back mixing chamber on the flowmeter two, double tube and mixing chamber intercommunication, mixing chamber and air inlet intercommunication.

Preferably, a first control valve and a second control valve are respectively arranged at the front parts of the dryer and the second flow controller.

The utility model discloses technical scheme's sulfur dioxide concentration detection device based on ultraviolet ray's beneficial effect is:

1. the detection device can be used for realizing quick and accurate detection on the sulfur dioxide content in the gas to be detected.

2. The detection device has the advantages of simple structure, convenience in installation, transportation and carrying, simplicity in operation and capability of being directly plugged after the debugging of a manufacturer.

3. Set up the ozone remover, avoid ozone to absorb the ultraviolet ray, further improve the inspection precision.

Drawings

FIG. 1 is a schematic structural diagram of a sulfur dioxide concentration detection device based on ultraviolet light according to the technical scheme of the present invention,

FIG. 2 is a schematic diagram of the structure of the gas treatment mechanism to be tested,

fig. 3 is a schematic diagram of the structure of the ultraviolet light path assembly.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

As shown in fig. 1, the utility model provides a sulfur dioxide concentration detection device based on ultraviolet light, including ultraviolet light generator 2, fluorescence detector 2a and reaction chamber 100. The reaction chamber 100 is connected with an air inlet mechanism 1 and an air outlet mechanism 1a, the gas to be detected enters the reaction chamber 100 from the air inlet mechanism 1, the ultraviolet light emitted by the ultraviolet light generator 2 excites sulfur dioxide in the gas to be detected in the reaction chamber 100, and the sulfur dioxide generates a fluorescence signal and is detected by the fluorescence detector 2 a. The reaction chamber 100 includes a light-tight cylindrical tube, the inside of which is smooth by a honing technique, and the smoothness of the inner surface is high, so that the optical signal is prevented from being reflected when contacting the inside of the cylindrical tube. The ultraviolet light generator comprises a light-tight detection chamber I6 and an ultraviolet light path component arranged in the detection chamber I6. The fluorescence detector comprises a second lightproof detection chamber 5 and a fluorescence detection assembly arranged in the second detection chamber 5, wherein the inner surface of the second detection chamber is subjected to Teflon spraying black treatment, so that the second detection chamber is lightproof, and the entering of external light is avoided to influence the detection result. The first detection chamber 6 and the second detection chamber 5 are hermetically connected to two ends of the reaction chamber 100 respectively.

Based on above-mentioned technical scheme, detection room one 6 and detection room two 5 all with reaction chamber 100 sealing connection, and light-tight in the junction, like this, the effectual outside air or light of having avoided gets into in the reaction chamber, influence testing result and detection precision. The structure in the technical scheme effectively ensures the precision of the detection equipment.

As shown in fig. 1, a mounting plate 4 is fixed on the first detection chamber 6 and the second detection chamber 5 respectively, the two mounting plates 4 are detachably fixed on a mounting table 3, the first detection chamber 6 and the second detection chamber 5 fix the cylindrical pipe body by two ends of the cylindrical pipe body respectively, and two ends of the cylindrical pipe body are arranged in the first detection chamber 6 and the second detection chamber 5 respectively and are sealed and fixed in a light-tight manner. Utilize and detect room one and detect the room two and realize the fixed to the cylindricality body, overall structure is simple, and structural component is few for equipment cost is low, can effectual reduction equipment's volume, the transportation and the transport of being convenient for have been being moved to outdoor use.

As shown in fig. 3, the ultraviolet light path assembly includes a light source 21, a lens 22, a first filter 23, a chopper 24 and a diaphragm 25, which are sequentially arranged. The diaphragm 25 is arranged close to the side of the cylindrical tube body, the light source 21 is connected with a voltage stabilizer and a light source back plate, the light source back plate realizes the selection and the driving of a low power consumption mode and a normal working mode of the light source, the aperture of the diaphragm 25 is smaller than the inner diameter of the cylindrical tube body, and the first optical filter 23 is an interference optical filter. In the technology, the ultraviolet light source is modulated by the chopper, so that the intensity and stability of the ultraviolet light are improved. The voltage stabilizer is used for controlling the stability of the ultraviolet light source and ensuring that the detected ultraviolet light source is not influenced by the voltage of an external circuit. The first filter 23 is an interference filter which ensures that uv light of wavelength 190-230 nm, most preferably 213nm, suitable for sulphur dioxide detection passes. The diaphragm 25 effectively prevents the ultraviolet tube from irradiating on the inner wall of the reaction chamber 100, and prevents the inner wall of the reaction chamber from reflecting ultraviolet light to influence the control of the ultraviolet light intensity.

As shown in fig. 3, the fluorescence detector 2a includes a condenser 27 and a photomultiplier 28 arranged in this order, and the photomultiplier 28 receives fluorescence passing through the condenser 27 and converts the fluorescence into an electric signal. The photomultiplier 28 is connected with a controller, the controller comprises a control system, a display screen, an alarm and the like, the control system receives the electric signal of the photomultiplier about the sulfur dioxide concentration and displays the electric signal on the display screen, and the alarm is controlled to give an alarm within a set value range.

As shown in fig. 2, the gas outlet means 1a includes a gas outlet provided on the reaction chamber 100. The air inlet mechanism 1 comprises an air inlet arranged on the reaction chamber 100, an air treatment mechanism to be tested communicated with the air inlet and an air pump 19 arranged on the air inlet, and the air treatment mechanism to be tested comprises an ozone remover 11. Set up ozone remover 11 and realize getting rid of the ozone in the gas of awaiting measuring, avoid ozone to absorb the sulfur dioxide in the gas of awaiting measuring, improve and detect the precision.

As shown in fig. 2, a sampling tube 10 is connected to an inlet of an ozone remover 11, and a first gas path and a second gas path are connected to an outlet of the ozone remover 11, wherein the first gas path comprises a dryer 12, a first flow controller 13, a first flow meter 14 and a double-layer tube 15 for removing hydrocarbons, which are sequentially arranged at the rear part of the ozone remover. The second gas path comprises a second flow controller 16 and a second flow meter 17 which are arranged in sequence, and the second flow meter 17 is connected with a rear mixing chamber 18. The double tube 15 communicates with a mixing chamber 18, and the mixing chamber 18 communicates with an air inlet. And the first gas circuit and the second gas circuit are arranged to respectively remove and not remove hydrocarbons in the gas to be detected. The setting of desicator realizes treating the gas of measureing the drying, gets rid of the moisture in the gas of measureing, improves and detects the structure. The ozone remover 11 is a high temperature ozone decomposer, i.e. ozone is rapidly decomposed into oxygen under high temperature condition, thus realizing the removal of ozone. This gas circuit one and gas circuit two's setting for this device can realize the gaseous detection in the multiple environment, extensive applicability. A first control valve and a second control valve are respectively arranged at the front parts of the dryer 12 and the second flow controller 16. And the gas circuit I and the gas circuit II are respectively controlled to work respectively or simultaneously.

In the working process, firstly, the air pump 19 works, the detection air with set concentration and pressure is filled into the reaction chamber 100, and in the inflation process, the light source backboard drives the light source 21 to be in a low power consumption mode, so that the energy is effectively saved, and the service life of the light source is prolonged. After the inflation is completed, the light source backboard drives the light source 21 to normally work in a normal working mode, and the light source is quickly started to emit ultraviolet light with specified wavelength. For example, the first optical filter 23 irradiates sulfur dioxide in the gas to be detected through ultraviolet light with a wavelength of 213nm, the sulfur dioxide is excited to emit fluorescence, the fluorescence is detected by the fluorescence detector 2a, the excitation time needs to be set, the light source is in a normal working mode in the excitation process, and after the excitation is finished, the light source backboard drives the light source 21 to be in a low power consumption mode again, so that the energy is effectively saved, and the service life of the light source is prolonged.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. The structures, devices, and methods of operation of the present invention, not specifically described and illustrated, are generally practiced by those of ordinary skill in the art without specific recitation or limitation.

Claims

1. A sulfur dioxide concentration detection device based on ultraviolet light comprises an ultraviolet light generator, a fluorescence detector and a reaction chamber, wherein an air inlet mechanism and an air outlet mechanism are connected to the reaction chamber, gas to be detected enters the reaction chamber from the air inlet mechanism, the ultraviolet light emitted by the ultraviolet light generator excites sulfur dioxide in the gas to be detected in the reaction chamber, and the sulfur dioxide generates a fluorescence signal and is detected by the fluorescence detector; the ultraviolet light detector comprises a second light-tight detection chamber and a fluorescence detection assembly arranged in the second detection chamber, and the first detection chamber and the second detection chamber are respectively connected to two ends of the reaction chamber in a sealing manner.

2. The ultraviolet-based sulfur dioxide concentration detection device as claimed in claim 1, wherein an installation plate is fixed on each of the first detection chamber and the second detection chamber, both the installation plates are detachably fixed on an installation table, the first detection chamber and the second detection chamber are respectively fixed on a cylindrical tube body by two ends of the cylindrical tube body, and two ends of the cylindrical tube body are respectively arranged in the first detection chamber and the second detection chamber and are sealed and fixed in a light-tight manner.

3. The ultraviolet-based sulfur dioxide concentration detection device according to claim 1, wherein the ultraviolet light path component comprises a light source, a lens, a first optical filter, a chopper and a diaphragm, which are arranged in sequence, the diaphragm is arranged near the cylindrical tube body, the light source is connected with a voltage stabilizer, the aperture of the diaphragm is smaller than the inner diameter of the cylindrical tube body, and the first optical filter is an interference optical filter.

4. The apparatus for detecting sulfur dioxide concentration based on ultraviolet light as claimed in claim 1, wherein the fluorescence detector comprises a condenser and a photomultiplier tube arranged in sequence, and the photomultiplier tube receives fluorescence passing through the condenser and converts the fluorescence into an electrical signal.

5. The ultraviolet-based sulfur dioxide concentration detection device according to claim 1, wherein the air outlet mechanism comprises an air outlet disposed on the reaction chamber, the air inlet mechanism comprises an air inlet disposed on the reaction chamber, an air treatment mechanism to be tested communicated with the air inlet, and an air pump disposed on the air inlet, and the air treatment mechanism to be tested comprises an ozone remover.

6. The ultraviolet-based sulfur dioxide concentration detection device as claimed in claim 5, wherein a sampling tube is connected to an inlet of the ozone remover, a first gas path and a second gas path are connected to an outlet of the ozone remover, the first gas path comprises a dryer, a first flow controller, a first flow meter and a double-layer tube for removing hydrocarbons, which are sequentially arranged at the rear part of the ozone remover, the second gas path comprises a second flow controller and a second flow meter, which are sequentially arranged, the second flow meter is connected with a rear mixing chamber, the double-layer tube is communicated with the mixing chamber, and the mixing chamber is communicated with the gas inlet.

7. The apparatus for detecting concentration of sulfur dioxide based on ultraviolet light as claimed in claim 6, wherein said dryer and said second flow controller are respectively provided with a first control valve and a second control valve at the front.