CN210198806U - Sampling device of positive pressure type oxygen analyzer - Google Patents
Sampling device of positive pressure type oxygen analyzer Download PDFInfo
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- CN210198806U CN210198806U CN201821676551.XU CN201821676551U CN210198806U CN 210198806 U CN210198806 U CN 210198806U CN 201821676551 U CN201821676551 U CN 201821676551U CN 210198806 U CN210198806 U CN 210198806U
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- oxygen analyzer
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Abstract
The utility model relates to a sampling device of a positive pressure type oxygen analyzer, which comprises a glass fiber demister, an active carbon filter, a calcium sulfate dryer and a flowmeter which are connected in sequence; the output end of the flowmeter is connected with an oxygen content detector. The utility model discloses mainly replace the washing system by composite sets such as active carbon filter, calcium sulfate desicator and flowmeter after glass fiber defroster, alkali treatment, solved the washing system in china winter in the north frozen problem, the moisture separator frost crack. The sample gas flows through a glass fiber demister, an activated carbon filter after alkali treatment and a calcium sulfate dryer three-level filtering device, and impurities such as solid impurities, sulfur dioxide gas, sulfur trioxide gas and water mist which have large influence on a zirconium oxide electrode are effectively eliminated. The utility model discloses substitution positive pressure type oxygen analyzer's that can be fine washing system makes oxygen analyzer work reliably more steadily, prolongs the continuous service life of zirconia sensor.
Description
Technical Field
The utility model relates to an analytical instrument technical field be applied to the waste acid schizolysis and advance converter oxygen content and measure sampling device specifically is a positive pressure type oxygen analyzer sampling device.
Background
Under the working condition of waste acid cracking, the oxygen concentration entering the converter from the outlet of the fan is an important index of process operation and is used as a control parameter of the oxygen/sulfur ratio entering the converter. In order to measure the oxygen content entering the converter at the outlet of the blower, a positive pressure type oxygen analyzer is generally used in consideration of the influence of the process sample gas on the zirconia sensor. The measured process sample gas entering the converter from the outlet of the fan contains a small amount of sulfur trioxide, solid impurities and sulfur dioxide, and if the sulfur dioxide in the measured gas is led into the zirconia detector, the zirconia sensor has the possibility of deterioration, and the accurate measurement of oxygen quantity and the service life of zirconia are influenced.
The patent number of the comparison document is CN 204228461U, and the patent name is: the improved sampling device of the oxygen analyzer discloses a sampling device of a positive pressure type oxygen analyzer, and a water washing system is adopted to eliminate background gases and impurities such as sulfur dioxide in process sample gas in patent documents, however, the water washing sampling device is easy to freeze and the problems of frost cracking of a gas-water separator and the like in the process of being used in winter in northern China, such as Jilin, Heilongjiang and the like, and the normal use of the instrument is seriously influenced. Therefore, a sampling device is needed, which can be adapted to winter in northern China, and can prevent the problems of icing, frost cracking of a gas-water separator and the like in the using process, so that the positive pressure type oxygen analyzer can work more reliably and stably, and the continuous service life of the zirconia sensor is prolonged.
Disclosure of Invention
1. The technical problem to be solved is as follows:
in order to solve the problems, the utility model provides a sampling device of a positive pressure type oxygen analyzer; the device can solve the problems of icing, frost cracking of the gas-water separator and the like in the use process in winter in the north of China when the positive pressure type oxygen analyzer adopts a water washing system, so that the positive pressure type oxygen analyzer can work more reliably and stably, and the continuous service life of the zirconia sensor is prolonged.
2. The technical scheme is as follows:
the utility model provides a positive pressure type oxygen analyzer sampling device which characterized in that: comprises a glass fiber demister, an activated carbon filter, a calcium sulfate dryer and a flowmeter which are connected in sequence; the output end of the flowmeter is connected with an oxygen content detector.
Further, the water pipe connected among the glass fiber demister, the activated carbon filter, the calcium sulfate dryer and the flow meter is an F46 pipe.
Further, the glass fiber demister comprises a cylindrical shell which is vertically placed; gas to be detected enters the glass fiber demister from the bottom of the cylindrical shell and is discharged from the top after passing through glass fibers;
furthermore, the glass fiber is alkali-free glass fiber, and the diameter of the monofilament is less than or equal to 20 um.
Further, the activated carbon filter includes a horizontally placed cylindrical housing; the inside of the shell of the activated carbon filter is alkaline treated wooden columnar activated carbon particles; gas enters from one end of the cylindrical shell of the activated carbon filter; discharging from the other end; the specific surface area of the activated carbon in the activated carbon filter is 1400-2400m2The load is calcium hydroxide or sodium hydroxide; the maximum diameter of the single active carbon is less than or equal to 10 mm.
Further, the calcium sulfate dryer comprises a cylindrical shell which is vertically placed; the gas enters the calcium sulfate dryer from the bottom end of the calcium sulfate dryer and is discharged from the top end.
Further, the calcium sulfate in the calcium sulfate dryer is blocky calcium sulfate.
Further, the flow rate of the gas passing through the flowmeter is controlled to be 0.6L/min-0.8L/min.
Further, the flowmeter is a self-operated flowmeter.
3. Has the advantages that:
this device replaces the washing system through the design and the positive pressure type oxygen analysis appearance sampling device that spent acid schizolysis converter import suited, eliminates impurity such as the great solid impurity of influence, sulfur dioxide gas, sulfur trioxide gas to the zirconia sensor in the technology sample gas to make positive pressure type oxygen analysis appearance can normal use, guarantee oxygen content measuring reliable stable, extension oxygen content detector's life.
Drawings
FIG. 1 is a schematic view of a prior art sampling device of a positive pressure oxygen analyzer of the water-wash type;
fig. 2 is a schematic structural view of the sampling device of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a device for sampling by adopting a water washing mode. The sampled gas is input into an oxygen detector 4 through a gas-water mixer 1 and a gas-water separator 2 in sequence, wherein 3 in the figure is a plastic-sprayed steel box body. It can be seen from the figure that the output sampling gas contains moisture, and the freezing gas-water separator is easy to be frozen and cracked.
As shown in fig. 2, the sampling device provided by the present invention comprises a glass fiber demister 5, an activated carbon filter 6, a calcium sulfate dryer 7 and a flow meter 8 which are connected in sequence; the output end of the flowmeter is connected with an oxygen content detector 4, and the specific treatment process is as follows:
this device is installed in waste acid cracker's fan exit, and operational environment is: the inlet of the converter is positive pressure, the pressure of the sample gas is less than 30 KPa, the temperature is lower than 60 ℃, and the measured process sample gas contains a small amount of sulfur trioxide, solid impurities and sulfur dioxide. Wherein the glass fiber filter 5 is formed by winding alkali-free glass fibers (the diameter of each filament is less than or equal to 20 um) on a demisting framework. And opening a process sample gas sampling valve under the constant temperature state of 700 ℃ controlled by an oxygen detector. After the process sample gas enters the glass fiber filter 5, a small amount of solid impurities, acid mist and a small amount of water in the sample gas can be effectively eliminated through direct interception, the filtered waste liquid can be discharged through a sewage discharge outlet of the glass fiber filter after being accumulated to a certain amount, and the sample gas flows to the active carbon filter 6 through a guide pipe.
An activated carbon filter 6 for oxidizing the sample gas by oxygenThe sulfur gas is effectively absorbed by the active carbon after the alkalization treatment, and the filtered sample gas enters a calcium sulfate dryer 7. The activated carbon in the activated carbon filter is alkali-treated wood columnar activated carbon, and the specific surface area of the activated carbon reaches 1400-2400m2And/g, a large amount of pores are formed on the activated carbon, so that the adsorption capacity of the activated carbon is improved. The load of the activated carbon filter is calcium hydroxide or sodium hydroxide, and the activated carbon filter can fully adsorb sulfur dioxide gas in the measured process sample gas.
The calcium sulfate dryer 7 is made of lump calcium sulfate. The function of the device is to absorb a small amount of moisture in the sample gas for the second time, so as to ensure that the sample gas entering the oxygen amount detection contains no moisture, and the sample gas flows to the flowmeter 8 through the guide pipe.
The flowmeter 8 is used for controlling the gas flow rate entering the positive pressure type oxygen detector 4, and is required to be controlled within 0.6L/min-0.8L/min, and the relative adsorption characteristic of the activated carbon is maximum within the flow rate range.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a positive pressure type oxygen analyzer sampling device which characterized in that: comprises a glass fiber demister, an activated carbon filter, a calcium sulfate dryer and a flowmeter which are connected in sequence; the output end of the flowmeter is connected with an oxygen content detector.
2. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the water pipe connected among the glass fiber demister, the activated carbon filter, the calcium sulfate dryer and the flowmeter is an F46 pipe.
3. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the glass fiber demister comprises a cylindrical shell which is vertically placed; gas to be detected enters the glass fiber demister from the bottom of the cylindrical shell and is discharged from the top after passing through the glass fiber.
4. A sampling device of a positive pressure type oxygen analyzer according to claim 3, wherein: the glass fiber is alkali-free glass fiber, and the diameter of the monofilament is less than or equal to 20 um.
5. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the activated carbon filter comprises a horizontally placed cylindrical shell; the inside of the shell of the activated carbon filter is alkaline treated wooden columnar activated carbon particles; gas enters from one end of the cylindrical shell of the activated carbon filter; discharging from the other end; the specific surface area of the activated carbon in the activated carbon filter is 1400-2400m2The load is calcium hydroxide or sodium hydroxide; the maximum diameter of the single active carbon is less than or equal to 10 mm.
6. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the calcium sulfate dryer comprises a cylindrical shell which is vertically placed; the gas enters the calcium sulfate dryer from the bottom end of the calcium sulfate dryer and is discharged from the top end.
7. The sampling device of a positive pressure type oxygen analyzer according to claim 6, wherein: the calcium sulfate in the calcium sulfate dryer is blocky calcium sulfate.
8. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the flow rate of the gas passing through the flowmeter is controlled to be 0.6L/min-0.8L/min.
9. The sampling device of a positive pressure type oxygen analyzer according to claim 1, wherein: the flowmeter is a self-operated flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821676551.XU CN210198806U (en) | 2018-10-16 | 2018-10-16 | Sampling device of positive pressure type oxygen analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821676551.XU CN210198806U (en) | 2018-10-16 | 2018-10-16 | Sampling device of positive pressure type oxygen analyzer |
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| CN210198806U true CN210198806U (en) | 2020-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534480A (en) * | 2022-03-04 | 2022-05-27 | 西藏浏河化工发展有限公司 | Chlorate electrolysis tail gas pretreatment method and oxygen content determination method applying same |
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2018
- 2018-10-16 CN CN201821676551.XU patent/CN210198806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534480A (en) * | 2022-03-04 | 2022-05-27 | 西藏浏河化工发展有限公司 | Chlorate electrolysis tail gas pretreatment method and oxygen content determination method applying same |
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