Extraction type zirconium oxide humidity and oxygen measuring instrument

Abstract

The utility model provides an extraction type zirconia humidity oxygen measuring instrument, including measuring device and output module, measuring device includes zirconia sensor, base and cover plate, zirconia sensor and base pass through the threaded connection, the inside of base is equipped with the detection cavity, the lower end of cobalt oxide sensor is located in the detection cavity, and the output module is located in the detection cavity. The cover plate is provided with an air inlet connector, the base is provided with an air outlet connector and a heating rod, and the air inlet connector and the air outlet connector are communicated with the detection cavity. Meanwhile, the installation mode of the sintering sheet and the filter screen catalyst is simple, and later maintenance and replacement are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas emission continuous monitoring, in particular to a kind of extracted zirconia humidity oxygen measuring instrument. BACKGROUND

[0002] The task of flue gas emission continuous monitoring is to continuously and real-time track the pollutant concentration in flue gas, while measuring the temperature, pressure, flow rate or flow, oxygen content of flue gas, water content of flue gas (or input flue gas water content) of the pollutant discharged by fixed pollution source, to calculate the flue gas pollutant emission rate and emission amount, to display and print various parameters and charts, and to transmit to the management department through data and graphic transmission system. The current mainstream method for monitoring flue gas humidity and oxygen is resistance-capacitance method and zirconia method.

[0003] The resistance-capacitance method is very mature in environmental air humidity monitoring, and is also basically mature in humidity monitoring under single working condition of power plant. However, there are still many problems to be solved in the application of complex flue gas humidity monitoring.

[0004] Zirconia has good corrosion resistance and can complete humidity and oxygen measurement at the same time, which is very suitable for occasions where humidity and oxygen need to be monitored simultaneously. Zirconia humidity and oxygen detection technology has been used in flue gas monitoring of fixed pollution sources, and has very good application experience for conventional working conditions.

[0005] However, the application of zirconia method in strong corrosive working conditions still needs further breakthrough, such as glass, waste incineration industry, pharmaceutical and chemical industry, etc. Currently, there are problems such as not meeting the expected service life and high maintenance frequency.

[0006] The present application is designed to improve the problems of sensor detection and use in harsh working conditions, and a zirconia sensor is designed to make the measurement of humidity and oxygen more accurate and the service life longer. SUMMARY

[0007] The present application aims to provide an extracted zirconia humidity and oxygen measuring instrument to improve the problems mentioned in the background art.

[0008] In order to achieve the above object, the application provides the following technical scheme: A kind of extractable zirconia humidity oxygen measuring instrument, including measuring device and output module, the measuring device includes zirconia sensor, base and cover plate, the zirconia sensor is connected with base by screw thread, base inside is equipped with detection cavity, zirconium cobalt sensor lower end is in detection cavity, the cover plate is equipped with air inlet joint, the base is equipped with air outlet joint and heating rod, the air inlet joint and air outlet joint are communicated with detection cavity, the detection cavity is sequentially equipped with catalyst, sintered sheet, sintered sheet sealing ring and cover plate sealing ring from inside to outside, the catalyst both sides are equipped with stainless steel mesh, the base is equipped with jack, the heating rod is fixed on jack by M3 tight nail, the cover plate is equipped with cover plate sealing ring groove, the cover plate sealing ring is placed in cover plate sealing ring groove, cover plate is connected with base by M4 combination screw.

[0009] As a preferred embodiment, the base is sequentially provided with a stainless steel mesh groove, a sintered sheet groove and a sintered sheet sealing ring groove, and the stainless steel mesh is tightly fitted with the stainless steel mesh groove. The stainless steel mesh and the stainless steel mesh groove need to be tightly fitted to avoid the catalyst from scattering when disassembled.

[0010] As a preferred embodiment, the sintered sheet groove has a thickness lower than that of the sintered sheet, and the sintered sheet groove and the sintered sheet are gap-fitted. The sintered sheet groove is lower than the thickness of the sintered sheet, and the sintered sheet groove and the sintered sheet are gap-fitted to avoid dust from being stuck and difficult to disassemble after long-term use.

[0011] As a preferred embodiment, the sintered sheet sealing ring is made of high-temperature-resistant and corrosion-resistant fluorine glue, the sintered sheet sealing ring has a wire diameter greater than the depth of the sintered sheet sealing ring groove, and the sintered sheet sealing ring has an inner diameter smaller than the diameter of the sintered sheet. After installation, it is ensured that the sintered sheet will not be melted by heat and will be pressed tightly.

[0012] As a preferred embodiment, the heating rod is continuously heated, and the heating temperature reaches above 200 degrees Celsius. This reduces the influence of condensed water on detection data and avoids damage to the sensor caused by condensed water after power failure and restart.

[0013] As a preferred embodiment, the cover plate sealing ring is made of high-temperature-resistant and corrosion-resistant fluorine glue, the cover plate sealing ring has a wire diameter greater than the depth of the cover plate sealing ring groove and smaller than the width of the cover plate sealing ring groove. It is ensured that the cover plate sealing ring will not be melted by heat and will seal the measuring cavity.

[0014] As a preferred embodiment, the stainless steel mesh is made of 316L material, which is resistant to high temperature and corrosion.

[0015] As a preferred embodiment, the cover plate is made of 316L material, and is internally provided with a buffer air chamber to avoid detection gas backflow when the pressure is too high.

[0016] As a preferred implementation, the sintered sheet is high-temperature resistant and corrosion resistant, and the filtering is performed while maintaining the air permeability.

[0017] As a preferred implementation, the base is made of 316L material, and a drainage groove is formed in the interior. The condensed water generated during power failure and the detection gas during detection can be conveniently discharged.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The cover plate has a buffer air chamber to avoid pressure backflow, a heating rod is installed on the detection cavity for high-temperature heating to remove condensed water, the sintered sheet is used for first-stage filtering to remove dust and liquid water, the stainless steel mesh and the catalyst are used for second-stage filtering to remove organic matter and corrosive gas, and the base is provided with a drainage groove to conveniently discharge condensed water generated during power failure and gas after zirconia detection.

[0020] 2. The structure greatly reduces the influence of dust, liquid water, organic matter and corrosive substances on the measurement result, reduces the corrosion of gas stains on the sensor, ensures the measurement accuracy and the service life of the sensor, and the sintered sheet, the filter mesh and the catalyst are simple to install and convenient to maintain and replace. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 is an exploded view of the structure of the present application;

[0023] Figure 3 is a schematic diagram of the cross section of the principle of the present application;

[0024] Figure 4 is a schematic diagram of the base and the cover plate of the present application;

[0025] Figure 5 is a schematic diagram of the installation of the sintered sheet of the present application;

[0026] In the drawing, 1 is a zirconia sensor, 2 is a base, 3 is a heating rod, 4 is a cover plate, 51 is an air inlet joint, 52 is an air outlet joint, 6 is an M4 combination screw, 7 is an M3 tight nail, 8 is a sintered sheet sealing ring, 9 is a sintered sheet, 10 is a stainless steel mesh, 11 is a catalyst, 12 is an output module, 13 is a cover plate sealing ring, 14 is a drainage groove, 15 is a buffer air chamber, 16 is a measuring device, 17 is a stainless steel mesh groove, 18 is a sintered sheet groove, 19 is a sintered sheet sealing ring groove, and 20 is a cover plate sealing ring groove. DETAILED DESCRIPTION

[0027] The application will be further described in detail below in combination with the drawings and examples. Identical parts are denoted by identical reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0028] Referring to Figures 1-2 , the application provides a technical solution:

[0029] A kind of zirconia humidity oxygen measuring instrument of extraction, including measuring device 16 and output module 12, the measuring device 16 includes zirconia sensor 1, base 2 and cover plate 4, the zirconia sensor 1 is connected with base 2 by screw thread, base 2 inside is equipped with detection cavity, zirconia sensor 1 lower end is in detection cavity, the cover plate 4 is equipped with air inlet joint 51, the base 2 is equipped with air outlet joint 52 and heating rod 3, the air inlet joint 51 and air outlet joint 52 are communicated with detection cavity, the detection cavity is sequentially equipped with catalyst 11, sintered sheet 9, sintered sheet sealing ring 8 and cover plate sealing ring 13 from inside to outside, the catalyst 11 both sides are equipped with stainless steel mesh 10, the base 2 is equipped with jack, the heating rod 3 is fixed on the jack by M3 tight nail 7, the cover plate 4 is equipped with cover plate sealing ring groove 20, the cover plate sealing ring 13 is placed in cover plate sealing ring groove 20, cover plate 4 is connected with base 2 by M4 combination screw 6.Base 2, cover plate 4, stainless steel mesh 10, sintered sheet 9, sintered sheet sealing ring 8, cover plate sealing ring 13 material must be resistant to high temperature corrosion resistance.

[0030] As Figures 3 to 4 shown: the base 2 inside is sequentially equipped with stainless steel mesh slot 17, sintered sheet slot 18 and sintered sheet sealing ring groove 19, the stainless steel mesh 10 is tightly matched with stainless steel mesh slot 11.Stainless steel mesh and stainless steel mesh slot need to be tightly matched to avoid catalyst scattering when disassembling.

[0031] The thickness of the sintered sheet slot 18 is lower than the thickness of the sintered sheet 9, and the sintered sheet slot 18 and the sintered sheet 9 are gap matched. The sintered sheet sealing ring 8 is made of high-temperature-resistant and corrosion-resistant fluorine glue, the sintered sheet sealing ring line diameter is greater than the sintered sheet sealing ring groove 19 depth, and the sintered sheet sealing ring inner diameter is less than the sintered sheet 9 diameter. The sintered sheet slot is lower than the sintered sheet thickness, and the sintered sheet slot and the sintered sheet are gap matched to avoid dust jamming and disassembly difficulty during long-term use.

[0032] The cover plate sealing ring 13 is made of high-temperature-resistant and corrosion-resistant fluorine glue, and the cover plate sealing ring 13 line diameter is greater than the cover plate sealing ring groove 20 depth and less than the cover plate sealing ring groove 20 width.

[0033] The final assembly effect is as Figure 3As shown, the gas to be tested can only enter the measuring device 16 through the air inlet 51 on the cover plate 4. After testing, the gas is discharged through the drainage groove 14 at the bottom of the base 2 and the air outlet 52.

[0034] This utility model relates to a heating rod 3, which provides continuous heating to a temperature exceeding 200 degrees Celsius. This reduces the impact of condensation on the detection data and also prevents damage to the sensor from condensation after a power outage and restart.

[0035] The stainless steel mesh 10 is made of 316L material, the cover plate 4 is made of 316L material, and a buffer air chamber 15 is provided inside to prevent backflow of detection air when the pressure is too high.

[0036] The sintered sheet 9 is resistant to high temperature and corrosion, and maintains air permeability while filtering.

[0037] The base 2 is made of 316L stainless steel and has a drainage groove 14 inside to facilitate the drainage of condensate water generated when the power is off and detection gas during testing.

[0038] like Figures 3-5 As shown: the stainless steel mesh 10 and the stainless steel mesh groove 17 are tightly fitted to prevent the catalyst 11 from falling off during disassembly. The sintered sheet 9 and the sintered sheet groove 18 are clearance fitted. The thickness of the sintered sheet 9 is greater than the groove depth of the sintered sheet groove 18 to ensure that the sintered sheet 9 can be easily replaced during maintenance. The sintered sheet sealing ring 8 and the cover plate 4 press the sintered sheet 9 tightly. The cover plate sealing ring 13 presses the base 2 tightly. The wire diameter of the sintered sheet sealing ring 8 and the cover plate sealing ring 13 is greater than the corresponding groove depth but less than the groove width to ensure that the sintered sheet sealing ring 8 and the cover plate sealing ring 13 deform during installation to seal the measuring cavity 16.

[0039] Working principle: The gas to be detected can only enter the measuring device 16 through the air inlet 51 on the cover plate 4. The cover plate 4 has a buffer chamber 15 to prevent pressure backflow. The heating rod 3 installed on the base 2 heats the gas at high temperature to remove condensate. The gas undergoes a first layer of filtration through the sintered plate 9 to remove dust and liquid water. The sintered plate 9 is squeezed and fixed by the sintered plate sealing ring 8. The stainless steel mesh 10 and the catalyst 11 perform a second layer of filtration to remove organic matter and corrosive substances. The filtered gas is combined with the zirconium oxide sensor 1 and the oxygen and humidity content is calculated by the sensor voltage. Finally, the results are displayed on the output module 12. After detection, the gas is discharged through the bottom drainage groove 14 and the air outlet 52.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extractable zirconium oxide humidity oxygen measuring instrument comprising a measuring device (16) and an output module (12), characterized in that: The measuring device (16) comprises a zirconia sensor (1), a base (2) and a cover plate (4), the zirconia sensor (1) is connected with the base (2) through threads, the inside of the base (2) is provided with a detection cavity, the lower end of the zirconia sensor (1) is in the detection cavity, the cover plate (4) is provided with an air inlet joint (51), the base (2) is provided with an air outlet joint (52) and a heating rod (3), the air inlet joint (51) and the air outlet joint (52) are communicated with the detection cavity, the detection cavity is sequentially provided with a catalyst (11), a sintered sheet (9), a sintered sheet sealing ring (8) and a cover plate sealing ring (13) from inside to outside, the catalyst (11) is provided with a stainless steel mesh (10) on both sides, the base (2) is provided with a jack, the heating rod (3) is fixed on the jack through an M3 tight bolt (7), the cover plate (4) is provided with a cover plate sealing ring groove (20), the cover plate sealing ring (13) is placed in the cover plate sealing ring groove (20), and the cover plate (4) is connected with the base (2) through an M4 combined screw (6).

2. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The inside of the base (2) is sequentially provided with a stainless steel mesh groove (17), a sintered sheet groove (18) and a sintered sheet sealing ring groove (19), and the stainless steel mesh (10) is tightly matched with the stainless steel mesh groove (17).

3. The extractable zirconium oxide humidity oxygen measuring instrument according to claim 2, characterized in that: The thickness of the sintered sheet groove (18) is lower than the thickness of the sintered sheet (9), and the sintered sheet groove (18) is gap matched with the sintered sheet (9).

4. The draw-out zirconia humidity oxygen measuring instrument according to claim 2, characterized in that: The sintered sheet sealing ring (8) is made of high-temperature-resistant and corrosion-resistant fluorine glue, the diameter of the sintered sheet sealing ring (8) is greater than the depth of the sintered sheet sealing ring groove (19), and the inner diameter of the sintered sheet sealing ring (8) is smaller than the diameter of the sintered sheet (9).

5. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The heating rod (3) is continuously heated, and the heating temperature reaches above 200 degrees Celsius.

6. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The cover plate sealing ring (13) is made of high-temperature-resistant and corrosion-resistant fluorine glue, the diameter of the cover plate sealing ring (13) is greater than the depth of the cover plate sealing ring groove (20), and smaller than the width of the cover plate sealing ring groove (20).

7. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The stainless steel mesh (10) is made of 316L material.

8. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The cover plate (4) is made of 316L material, and is provided with a buffer air chamber (15) inside.

9. The draw-out zirconia humidity oxygen measuring instrument according to claim 1, characterized in that: The sintered sheet (9) is high-temperature-resistant and corrosion-resistant, filters and keeps air permeability at the same time.

10. The draw-out zirconium oxide humidity oxygen measuring instrument according to claim 1, characterized in that: The base (2) is made of 316L material, and is provided with a drainage groove (14) inside.

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