CN212008309U - Device for prolonging maintenance period of air chamber of heat-wet method ultraviolet flue gas analyzer - Google Patents
Device for prolonging maintenance period of air chamber of heat-wet method ultraviolet flue gas analyzer Download PDFInfo
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- CN212008309U CN212008309U CN202020603801.8U CN202020603801U CN212008309U CN 212008309 U CN212008309 U CN 212008309U CN 202020603801 U CN202020603801 U CN 202020603801U CN 212008309 U CN212008309 U CN 212008309U
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Abstract
The utility model discloses a device of extension hot wet process ultraviolet flue gas analyzer air chamber maintenance cycle includes the air chamber, the air chamber front end is equipped with the sample gas import, and the rear end is equipped with sample gas export and shielding gas import, the inside both sides of air chamber are provided with the air current deflector. In the utility model, only a group of clean shielding gas is used to separate the lens from the sample gas, the sample gas and the shielding gas are not mixed, the measurement result is true and accurate, and the lens in the instrument is effectively protected from being polluted; the use cost is low, and the environment pollution caused by wastes is avoided; the protective gas can also adopt clean air after filtration and drying without inert gas; cyclic utilization, energy saving and environmental protection.
Description
Technical Field
The utility model relates to an environmental monitoring field, including oil smoke monitoring, raise dust monitoring, smoke and dust monitoring etc. especially relate to a device of extension hot wet method ultraviolet flue gas analyzer air chamber maintenance cycle.
Background
The traditional portable ultraviolet analyzer mostly adopts a cold dry method for sampling, and the cold dry method has the defect that sulfur dioxide which is easy to dissolve in water in flue gas can react with condensed water, so that the measurement result is influenced. The portable ultraviolet analyzer of the thermal wet method directly pumps the sample gas into the high-temperature gas chamber along the heat tracing pipeline after filtering, no water vapor condensation exists in the whole process, and the measurement of gases such as sulfur dioxide and the like which are easy to dissolve in water can be more accurate.
The existing thermal wet method has the defects of the existing thermal wet method, and the portable ultraviolet analyzer of the thermal wet method needs to extract sample gas to enter the gas chamber for spectral analysis in the working process. Various gases (such as hydrogen chloride, ammonia gas and water vapor) entering the gas chamber chemically react to form ammonium salt crystals attached to the surface of the optical lens, or oily substances VOCs entering the gas chamber are attached to the surface of the lens, so that the light flux of the lens is reduced, even spectral lines are interfered, the measurement result is inaccurate, and the instrument maintenance period is shortened. The traditional solution is to use phosphoric acid ammonia remover to remove ammonia gas and concentrated sulfuric acid to remove water vapor. However, the use of ammonia removal agents causes gas adsorption, and the use of concentrated sulfuric acid is dangerous for operators. The two methods are also very high in use cost and poor in economic benefit. Improper disposal of the waste can also cause environmental pollution. Prior patent CN102985805B discloses an apparatus for ultraviolet spectroscopic analysis of gaseous compounds comprising: a measurement channel containing a flow of sample gas; a window arranged at a first end of the measurement channel and being transmissive for ultraviolet radiation; a radiation source generating ultraviolet radiation and arranged to emit radiation into the measurement channel through the window; and a spectrometer for measuring ultraviolet radiation at a second, opposite end of the measurement channel. However, in the device of the invention, the front end and the rear end of the device are filled with the protective gas, and the outlets of the sample gas and the protective gas are arranged on the same side, so that the sample gas and the protective gas are mixed, and the detection result is influenced.
In summary, there is a need for a device for prolonging the maintenance period of a gas chamber of a thermal-wet ultraviolet flue gas analyzer, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
For solving above-mentioned prior art problem, the utility model provides a device of extension hot wet process ultraviolet flue gas analyzer air chamber maintenance cycle, simple structure saves the part cost, and assembly easy operation improves the assembly quality, has prolonged the clean cycle of maintenance of protection lens, saves detecting instrument's operation cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a prolong device of hot wet method ultraviolet flue gas analyzer air chamber maintenance cycle, includes the air chamber, the front end of air chamber is equipped with the sample gas import, and the rear end is equipped with sample gas export and protection gas import, the inside both sides of air chamber are provided with the air current deflector.
In the embodiment of the utility model, the sample gas outlet is connected with a condenser, a three-way valve and an exhaust pump in sequence outside the gas chamber; one end of the three-way valve is sequentially connected with the filter, the protection air pump and the protection air inlet.
In an embodiment of the present invention, the orientation of the shielding gas inlet in the air chamber is perpendicular to the direction of the air flow entering the sample gas inlet.
The embodiment of the utility model provides an in, concave mirror and convex lens are equipped with in the air chamber, the concave mirror is located sample gas import one side, convex lens is located sample gas export one side.
In the embodiment of the present invention, the airflow guiding plate is annular, and the airflow guiding plate is symmetrically disposed on two sides of the air chamber.
In an embodiment of the present invention, the sample gas inlet and the sample gas outlet are both rectangular; the shape of the shielding gas inlet is L-shaped.
The embodiment of the utility model provides an in, the quantity of sample gas import is two, and the symmetric distribution is in the both sides of air current deflector.
The utility model discloses an in the embodiment outside the air chamber, the protection gas import inserts condenser, protection air pump and filter.
In an embodiment of the present invention, the optical path in the air chamber is a reciprocating type.
In an embodiment of the present invention, the shape of the air chamber is one of a cylindrical shape and a prismatic shape.
The utility model discloses a theory of operation does:
sample gas enters from two sides of the front end of the gas chamber and flows to the convex lens under the guidance of the airflow guide plate; the other end of the gas chamber is provided with a sample gas outlet and a protective gas inlet, and the protective gas forms a protective gas curtain in front of the convex lens because the protective gas inlet is L-shaped, so that the pollution of the sample gas to the convex lens is effectively avoided; and under the action of the airflow guide plate and the exhaust pump, the sample gas and the protective gas are jointly exhausted from the sample gas outlet. In some embodiments of the present invention, the adopted protective gas may be clean air after filtering and drying treatment or sample gas after filtering and drying treatment and having sample gas outlet.
The technical scheme of the utility model prior art relatively has following technological effect:
firstly, the utility model only uses a group of clean protective gas to separate the lens from the sample gas, the sample gas and the protective gas are not mixed, the measurement result is real and accurate, and the lens in the instrument is effectively protected from being polluted; the use cost is low, and the environment pollution caused by waste is avoided.
Secondly, the utility model introduces a three-way valve into the gas path connected with the sample gas outlet, introduces the condensed sample gas into the gas path of the protective gas, and then enters the gas chamber again as the protective gas after passing through the filter; the protective gas can also adopt clean air after filtration and drying without inert gas; cyclic utilization, energy saving and environmental protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the air chamber of the present invention.
Fig. 2 is a schematic diagram of the gas circuit in embodiment 1.
Fig. 3 is a schematic diagram of the gas circuit in embodiment 2.
Reference numerals: 1-air chamber; 2-airflow guide plate; 3-a concave mirror; a 4-convex lens; 5-sample gas outlet; 6-protective gas inlet; 7-sample gas inlet; 8-a pre-condenser; 9-an exhaust pump; 10-a filter; 11-protecting the air pump; 12-post condenser.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
As shown in fig. 1, a device for prolonging the maintenance period of a gas chamber of a thermal-wet method ultraviolet flue gas analyzer comprises a gas chamber 1, an airflow guide plate 2, a concave mirror 3, a convex lens 4, a sample gas outlet 5, a protective gas inlet 6 and a sample gas inlet 7; wherein, the air chamber 1 is cylindrical; two sample gas inlets 7 are symmetrically distributed at the front end of the gas chamber 1, and the shape of each sample gas inlet 7 is rectangular; a concave mirror 3 is arranged between the two sample gas inlets 7; the rear end of concave mirror is connected with air current deflector 2, because air current deflector 2 has certain length, so the direct rear that flows to air chamber 1 of direct flow direction behind the sample gas entering air chamber 1 avoids the direct flow direction of sample gas air current to concave mirror 3, causes the pollution to it. A sample gas outlet 5 and a protective gas inlet 6 are symmetrically arranged at the rear end of the gas chamber 1; the shape of the sample gas outlet 5 is rectangular, and the shape of the protective gas inlet 6 is L-shaped; a convex lens 4 is arranged between the sample gas outlet 5 and the protective gas inlet 6, the orientation of the protective gas inlet 6 in the gas chamber 1 is parallel to the mirror surface direction of the convex lens 4, and the protective gas can form a gas curtain in front of the convex lens 4. The front end of the convex lens 4 is also provided with an airflow guide plate 2, and the airflow guide plate 2 is equivalent to establish an isolation area, so that the protective gas is guided to flow in the opposite direction of the sample gas, and a protective gas curtain layer can be formed on the surface of the convex lens 4. The airflow guide plate 2 is annular, so that the functions of diversion and isolation can be well achieved.
The rear end of the convex lens 4 is connected with an access optical fiber which is used for transmitting a detection light source and receiving an optical signal scattered by the sample gas. Since the concave mirror 3 is provided in the gas cell 1 and the concave mirror 3 reflects the light source, the optical path in the gas cell 1 is reciprocated.
As shown in fig. 2, outside the gas chamber 1, the sample gas outlet 5 is connected to a front condenser 8, a three-way valve (not shown) and an exhaust pump 9 in sequence; a gas path of shielding gas is led out from the third end of the three-way valve and is sequentially connected with a filter 10 and a shielding gas pump 11; wherein the protective air pump 11 is connected with the protective air inlet 6; in the gas path of the present embodiment, the shielding gas charged in the gas chamber 1 is the sample gas after condensation and filtration. The shielding gas flow rate is not greater than the sample gas flow rate; the temperature of the shielding gas is equal to that of the gas chamber. The front condenser 8 is used for removing water vapor in the sample gas, and the filter 10 is used for removing ammonium salt generated by the reaction of the sample gas, because in the field sampling process, flue gas discharged by a chimney is gas subjected to desulfurization and denitrification treatment, the components are very complex, and the sample gas can continue to react to form ammonium salt solid in the extraction process.
The utility model discloses a theory of operation does:
sample gas enters from two sides of the front end of the gas chamber 1 and flows to the convex lens 4 under the guidance of the airflow guide plate 2; meanwhile, the air flow guide plate 2 is arranged at the rear end of the concave mirror 3, so that sample gas cannot pollute the concave mirror 3; because the protective gas inlet 6 is L-shaped, the protective gas forms a protective gas curtain in front of the convex lens 4, and the pollution of the sample gas to the convex lens 4 is effectively avoided; the sample gas and the shielding gas are discharged together from the sample gas outlet 5 by the gas flow guide 2 and the exhaust pump 9. The discharged part of the gas passes through a three-way valve and a filter 10, and then enters the gas chamber 1 again as shielding gas through a shielding gas pump 11.
Example 2
As shown in fig. 3, the present embodiment is different from embodiment 1 in that, outside the air chamber 1, the shielding gas inlet 6 is connected to the post-condenser 12, the shielding gas pump 11 and the filter 10; in the air path of the present embodiment, the shielding gas filled in the air chamber 1 is the clean air after being filtered and dried.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A device for prolonging the maintenance period of a gas chamber of a heat-wet method ultraviolet flue gas analyzer is characterized by comprising
The air chamber, the front end of air chamber is equipped with the sample gas import, and the rear end is equipped with sample gas export and protection gas import, the inside both sides of air chamber are provided with the air current deflector.
2. The device for prolonging the maintenance period of the air chamber of the thermal-wet ultraviolet flue gas analyzer according to claim 1, wherein the sample gas outlet is connected to a condenser, a three-way valve and an exhaust pump in sequence outside the air chamber; one end of the three-way valve is sequentially connected with the filter, the protection air pump and the protection air inlet.
3. The apparatus of claim 1, wherein the shielding gas inlet is oriented in the gas chamber perpendicular to the direction of the gas flow entering the sample gas inlet.
4. The device for prolonging the maintenance period of the air chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein a concave mirror and a convex lens are arranged in the air chamber, the concave mirror is positioned on one side of the sample gas inlet, and the convex lens is positioned on one side of the sample gas outlet.
5. The device for prolonging the maintenance period of the air chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein the air flow guide plates are annular, and the air flow guide plates are symmetrically arranged on two sides in the air chamber.
6. The device for prolonging the maintenance period of the gas chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein the sample gas inlet and the sample gas outlet are both rectangular in shape; the shape of the shielding gas inlet is L-shaped.
7. The device for prolonging the maintenance period of the air chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 5, wherein the number of the sample gas inlets is two, and the sample gas inlets are symmetrically distributed on two sides of the airflow guide plate.
8. The device for prolonging the maintenance period of the air chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein a condenser, a protection air pump and a filter are connected to the protection air inlet outside the air chamber.
9. The device for prolonging the maintenance period of the air chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein the optical path in the air chamber is in a reciprocating manner.
10. The device for prolonging the maintenance period of the gas chamber of the thermo-wet ultraviolet flue gas analyzer according to claim 1, wherein the gas chamber is in one of a cylindrical shape and a prismatic shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020603801.8U CN212008309U (en) | 2020-04-21 | 2020-04-21 | Device for prolonging maintenance period of air chamber of heat-wet method ultraviolet flue gas analyzer |
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| CN202020603801.8U CN212008309U (en) | 2020-04-21 | 2020-04-21 | Device for prolonging maintenance period of air chamber of heat-wet method ultraviolet flue gas analyzer |
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| CN212008309U true CN212008309U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858202A (en) * | 2021-02-26 | 2021-05-28 | 江苏天瑞仪器股份有限公司 | Series connection type detection device and detection method for diesel engine discharged particulate matters and gas |
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2020
- 2020-04-21 CN CN202020603801.8U patent/CN212008309U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858202A (en) * | 2021-02-26 | 2021-05-28 | 江苏天瑞仪器股份有限公司 | Series connection type detection device and detection method for diesel engine discharged particulate matters and gas |
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