CN210572086U - Device for measuring moisture content of flue gas by using single oxygen sensor - Google Patents
Device for measuring moisture content of flue gas by using single oxygen sensor Download PDFInfo
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- CN210572086U CN210572086U CN201921504284.2U CN201921504284U CN210572086U CN 210572086 U CN210572086 U CN 210572086U CN 201921504284 U CN201921504284 U CN 201921504284U CN 210572086 U CN210572086 U CN 210572086U
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Abstract
The utility model provides a device for measuring flue gas moisture content by using a single oxygen sensor, which comprises a shell, wherein the outer part of the shell is connected with a sampling pipe, a gas outlet and a liquid outlet, a first three-way valve, a first condensation water removal device, a second three-way valve, a three-way pipe, a flow control device and a vacuum pump are sequentially connected between the sampling pipe and the gas outlet through a gas pipe, a third three-way valve, an oxygen sensor, a pressure transmitter and a second condensation water removal device are connected between the first three-way valve and the three-way pipe through a gas pipe, and the second three-way valve is communicated with the third three; the condensation dewatering device is connected to the liquid outlet through a water pipe. The utility model discloses an oxygen sensor can measure wet oxygen content and dry oxygen content in the flue gas, has reduced the device hardware cost. Meanwhile, the measuring errors generated by different sensors are reduced, and the reliability and the accuracy of the measuring result are improved.
Description
Technical Field
The utility model belongs to fixed pollution sources online smoke detection equipment field especially relates to an utilize single oxygen sensor to measure moisture content's device futilely wet oxygen method.
Background
In the field of on-line smoke detection of fixed pollution sources, the humidity of high-temperature smoke is mostly detected by adopting a dry-wet oxygen measuring device. Among traditional wet oxygen measuring device futilely, the direct cartridge of wet oxygen measuring device is in the flue, and dry oxygen measuring device sets up behind pretreatment systems, and the flue gas at first passes through wet oxygen measuring device in the course of the work, then carries out a series of processings through pretreatment systems, and the flue gas that finally passes through the processing just can get into dry oxygen measuring device and carry out the dry oxygen and measure. The dry and wet oxygen measuring device needs to use two oxygen sensors, so that the equipment cost is increased, and meanwhile, the drift directions of the dry oxygen measuring device and the wet oxygen measuring device are inconsistent, so that the calculated humidity deviation is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses need use two oxygen sensors to current dry wet oxygen measuring device, high in manufacturing cost, the big technical problem of measuring error provide one kind and utilize the dry wet oxygen method of single zirconia sensor to measure the device of moisture content for flue gas humidity measuring deviation descends by a wide margin, and stability improves, cost reduction.
In order to achieve the above object, the utility model discloses a technical scheme be:
a device for measuring the moisture content of flue gas by using a single oxygen sensor comprises a shell, wherein a sampling pipe, a gas outlet and a liquid outlet are connected to the outer part of the shell, a first three-way valve, a first condensation water removal device, a second three-way valve, a first three-way pipe, a flow control device and a vacuum pump are connected between the sampling pipe and the gas outlet through a gas pipe in one step, a third three-way valve, an oxygen sensor, a pressure transmitter and a second condensation water removal device are connected between the first three-way valve and the three-way pipe through a gas pipe, and the second three-way valve is communicated with the; the condensation dewatering device is connected to the liquid outlet through a water pipe.
Preferably, a fourth three-way valve is arranged on an air path between the sampling pipe and the first three-way valve, and the fourth three-way valve is connected with the calibration device.
Preferably, a second three-way pipe is arranged on an air path between the sampling pipe and the first three-way valve, and the second three-way pipe is connected with the electromagnetic valve and the back-blowing air pump.
Preferably, the condensation water removal device comprises a box body for containing gas and a semiconductor refrigeration piece.
Preferably, the oxygen sensor is a zirconia oxide sensor.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. this utilize single oxygen sensor to measure device of flue gas moisture content can measure wet oxygen content and dry oxygen content in the flue gas through an oxygen sensor, has reduced device hardware cost.
2. The same sensor reduces the measurement error caused by different sensors, and improves the reliability and accuracy of the measurement result.
3. The device gas circuit is simple than traditional gas circuit, increases the blowback gas circuit, prolongs oxygen sensor's life, and whole device stability is high, maintains simply.
Drawings
FIG. 1 is a pipeline connection diagram of the device for measuring the moisture content of flue gas according to the present invention;
in the above figures: 1. a housing; 2. an air outlet; 3. a liquid outlet; 4. a sampling tube; 5. a first three-way valve; 6. a first condensation water removal device; 7. a second three-way valve; 8. a first three-way pipe; 9. a flow control device; 10. a vacuum pump; 11. a third three-way valve; 12. a pressure transmitter; 13. a zirconium oxide sensor; 14. a second condensation water removal device; 15. a calibration device; 16. an electromagnetic valve; 17. a back-blowing air pump; 18. an air tube; 19. a water pipe; 20. a fourth three-way valve; 21. a second three-way pipe; 22. and a third three-way pipe.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example (b): as shown in figure 1, the device for measuring the moisture content of the flue gas by using the single oxygen sensor comprises a shell 1, wherein a sampling pipe 4, an air outlet 2 and a liquid outlet 3 are connected to the outside of the shell 1, and a pipeline, a sensor and other devices for detecting the moisture content are arranged inside the shell 1. A first three-way valve 5, a first condensation and dehydration device 6, a second three-way valve 7, a first three-way pipe 8, a flow control device 9 and a vacuum pump 10 are sequentially connected between the sampling pipe 4 and the gas outlet 2 through a gas pipe 18, a branch is connected between the first three-way valve 5 and the three-way pipe through the gas pipe 18 and comprises a third three-way valve 11, an oxygen sensor, a pressure transmitter 12 and a second condensation and dehydration device 14 which are sequentially connected through the gas pipe 18, and a third joint of the second three-way valve 7 is communicated with a third joint of the third three-way valve 11 through the gas pipe 18; the first condensation water-removing device 6 and the second condensation water-removing device 14 are connected to a third three-way pipe 22 through a water pipe 19 and converge to the liquid outlet 3, and condensate is discharged. The zirconium oxide sensor 13 is selected as the oxygen sensor in this embodiment.
When the moisture content of the flue gas is measured, the pipeline of the device is divided into two branches of a wet gas pipeline and a dry gas pipeline through the on-off control of different joints of the three-way valve. The flue gas wet gas pipeline flow comprises the following steps: sampling pipe 4 stretches into in the flue, and by the vacuum pump 10 extraction gas make the pipeline in produce the negative pressure, by flow control device 9 control flow, the flue gas is gathered the entering device main part through sampling pipe 4, passes through first three-way valve 5, third three-way valve 11, zirconia sensor 13 and pressure transmitter 12 in proper order, and at last through second condensation water trap 14, waste gas is discharged through gas outlet 2 behind flow control device 9 and the vacuum pump 10. The gas outlet 2 can be connected with other component measuring devices, and the flue gas is discharged after being dehumidified by the second condensation and dehydration device 14, so that rear devices can be protected. The condensed water collected by the second condensate removing device 14 is guided out to the liquid outlet 3 through the water pipe 19 and finally discharged. The flow control device 9 can be selected from a proportional valve, a servo valve or a flow meter, and the proportional valve is adopted in the embodiment and is easy to purchase and assemble. The condensation dewatering device comprises a box body for containing gas and a semiconductor refrigerating sheet, the refrigerating effect is good, and other refrigerating devices in the prior art can be adopted.
The flue gas dry gas pipeline flow is as follows: the flue gas is collected by a sampling pipe 4 and enters the device main body, and the flue gas passes through a first three-way valve 5 and a first condensation water removal device 6, and condensate is discharged through a water pipe 19; the flue gas passes through a third three-way valve 11, a zirconium peroxide sensor 13 and a pressure transmitter 12, and finally is discharged after passing through a second condensation and water removal device 14, a flow control device 9 and a vacuum pump 10. And mutually exclusive wet gas pipelines and dry gas pipelines are used for respectively measuring the oxygen content of dry gas or wet gas, and the moisture content of the sampled gas is calculated according to a pair of data measured each time and the pressure value measured by the pressure transmitter 12.
A fourth three-way valve 20 is arranged on an air path between the sampling pipe 4 and the first three-way valve 5, the fourth three-way valve 20 is connected with the calibrating device 15, and the calibrating device 15 is used for calibrating by air or the same standard gas regularly, so that the stability of the measuring result of the device is improved. The oxygen sensor carries out automatic calibration according to the oxygen content in the air, has improved oxygen sensor's measurement accuracy to measure wet oxygen content and dry oxygen content in the flue gas more accurately.
And a second three-way pipe 21 is arranged on an air path between the sampling pipe 4 and the first three-way valve 5, and the second three-way pipe 21 is connected with the electromagnetic valve 16 and the back-blowing air pump 17. The back-blowing air pump 17 blows clean air into the air path, and the air is used for blowing the pipeline so as to clean the pipeline and prolong the service life of the oxygen sensor.
In conclusion, the device for measuring the moisture content of the flue gas by using the single oxygen sensor can measure the moisture content and the dry oxygen content of the flue gas by using one oxygen sensor, so that the hardware cost of the device is reduced. Meanwhile, the measuring errors generated by different sensors are reduced, and the reliability and the accuracy of the measuring result are improved. The device gas circuit is simple than traditional gas circuit, increases the blowback gas circuit, prolongs oxygen sensor's life, and whole device stability is high, maintains simply.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides an utilize single oxygen sensor to measure flue gas moisture content's device which characterized in that: the device comprises a shell, wherein a sampling pipe, a gas outlet and a liquid outlet are connected to the outer part of the shell, a first three-way valve, a first condensation water removal device, a second three-way valve, a first three-way pipe, a flow control device and a vacuum pump are sequentially connected between the sampling pipe and the gas outlet through a gas pipe, a third three-way valve, an oxygen sensor, a pressure transmitter and a second condensation water removal device are connected between the first three-way valve and the three-way pipe through a gas pipe, and the second three-way valve is communicated with the third three-; the condensation dewatering device is connected to the liquid outlet through a water pipe.
2. The device for measuring the moisture content of the flue gas by using the single oxygen sensor as claimed in claim 1, wherein: and a fourth three-way valve is arranged on the gas path between the sampling pipe and the first three-way valve and is connected with the calibration device.
3. The device for measuring the moisture content of the flue gas by using the single oxygen sensor as claimed in claim 2, wherein: and a second three-way pipe is arranged on an air path between the sampling pipe and the first three-way valve, and the second three-way pipe is connected with the electromagnetic valve and the back flushing air pump.
4. The device for measuring the moisture content of flue gas by using the single oxygen sensor as claimed in claim 3, wherein: the condensation dewatering device comprises a box body for containing gas and a semiconductor refrigeration piece.
5. The device for measuring the moisture content of the flue gas by using the single oxygen sensor as claimed in claim 4, wherein: the oxygen sensor is a zirconia oxide sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921504284.2U CN210572086U (en) | 2019-09-10 | 2019-09-10 | Device for measuring moisture content of flue gas by using single oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921504284.2U CN210572086U (en) | 2019-09-10 | 2019-09-10 | Device for measuring moisture content of flue gas by using single oxygen sensor |
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| Publication Number | Publication Date |
|---|---|
| CN210572086U true CN210572086U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921504284.2U Active CN210572086U (en) | 2019-09-10 | 2019-09-10 | Device for measuring moisture content of flue gas by using single oxygen sensor |
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| Country | Link |
|---|---|
| CN (1) | CN210572086U (en) |
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2019
- 2019-09-10 CN CN201921504284.2U patent/CN210572086U/en active Active
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Address after: 266000 No. 1, Yueyang Road, Chengyang District, Qingdao City, Shandong Patentee after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 266108 No.1 XueYue Road, Chengyang District, Qingdao, Shandong Province Patentee before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |