CN101566593B - Sulphuric acid dew point monitoring analyzer - Google Patents
Sulphuric acid dew point monitoring analyzer Download PDFInfo
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- CN101566593B CN101566593B CN2008100937979A CN200810093797A CN101566593B CN 101566593 B CN101566593 B CN 101566593B CN 2008100937979 A CN2008100937979 A CN 2008100937979A CN 200810093797 A CN200810093797 A CN 200810093797A CN 101566593 B CN101566593 B CN 101566593B
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Abstract
The invention relates to a sulphuric acid dew point monitoring analyzer which comprises a main control board arranged in a mainframe box, a signal magnification unit, a frequency generator and a main power supply, wherein the signal magnification unit is connected with a sensor by a signal wire. The front end of the sensor is provided with a casing, the middle part of the front end is provided with a platinum ring in which a platinum-rhodium-platinum thermocouple is arranged, the signal magnification unit is connected with the main control board, the mainframe box is provided with a thermometer and an ammeter which are connected with the main control board by the signal wire, the center of the sensor is provided with a cooling air passage communicated with an outer cooling air inlet on themainframe box, and the mainframe box is provided with a power supply switch, a main control keyboard, a display screen, an output unit and a cooling air adjusting valve. When in detection, the coolin g air of the cooling air inlet is adjusted, the sensor is arranged in a flue, and acid substances on the inner surface layer of the sensor starts to deposit on the outer surface. When the current is steady, the temperature measured by the sensitive end of the platinum thermocouple is an acid dew point in flue gas. The invention has accurate measurement and simple operation.
Description
Technical field
The present invention relates to a kind of acidic materials dew point monitoring analyzer, particularly relate to a kind of sulphuric acid dew point monitoring analyzer that detects equipment such as heat economizer, air preheater, induced draft fan, walling of flue.Belong to the environment monitoring technical field.
Background technology
Along with being rooted in the hearts of the people of Scientific Outlook on Development theory, energy-saving and emission-reduction have been the cardinal task of each enterprises pay attention, and still, having quite, some operating modes also are faced with environmental pollution, impaired the having a strong impact on of equipment.As heat economizer, air preheater, induced draft fan, walling of flue, coal burning boiler, fuel oil back-up system, SO
3Operating modes such as jettison system, MgO jettison system, smelting furnace discharging acid plant, chemical fertilizer factory all are faced with sulfurous fuel when burned, and sulphur is with oxidized generation SO
2, wherein a part of SO
2Further be oxidized to SO again
3, SO
3With moisture content in the process gas in conjunction with after promptly generate sulfuric acid, the generation of sulfuric acid will directly influence the equipment long-term operation and the production efficiency of factory, the production maintenance cost is improved greatly, and the generation of sulfuric acid also can cause acid soot emissions in addition, and environment is polluted.In the prior art, industry spot is often calculated acid dew point according to theoretical formula, but is subjected to technique change, flow, dust, temperature, the variation of flow velocity and can not really know and the temperature of SO3 dewfall finally cause equipment corrosion to increase operating cost.Therefore, how accurately to grasp the dew point of sulfuric acid, judge that by dew point the concentration of sulfuric acid in the flue gas is the important topic that those skilled in the art extremely pay close attention to.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of detection heat economizer, air preheater, induced draft fan, walling of flue, fuel oil, coal burning boiler, fuel oil back-up system, SO are provided
3Jettison system, MgO jettison system, smelting furnace discharge the acid content value of environment such as acid plant, chemical fertilizer factory, thereby reach a kind of sulphuric acid dew point check and analysis instrument of energy-conserving and environment-protective purpose.
A kind of sulphuric acid dew point monitoring analyzer of the present invention, comprise the master control borad that is arranged in the mainframe box, signal amplification unit, frequency generator, primary power, described signal amplification unit is connected with sensor by signal wire, the front end setting of described sensor has the shell of heatproof glass-encapsulated, described sensor front end middle part is provided with platinum loop, be provided with platinum Pt Rh platinum thermopair in the described platinum loop, described signal amplification unit is connected with described master control borad, described mainframe box panel is provided with thermometer, reometer, described thermometer, reometer is connected with master control borad by signal wire, described center sensor be provided be arranged on described mainframe box on the cooling air channels that is connected of external cooling air intake.
And also be provided with power switch, external master keyboard, display screen and output unit on the described mainframe box, also be provided with adjusting enters into the cooling air size of described cooling air channels by cooling air intake cooling air variable valve above the described mainframe box.
Sulphuric acid dew point monitoring analyzer of the present invention has following advantage with respect to prior art:
1, the platinum loop of sensor front end of the present invention and platinum-rhodium thermocouple are integrated is encapsulated in the glass, guaranteed that sensitive element is not corroded, realized the long-life, made sensor surface be beneficial to the coagulating sedimentation of acid, improve the sensitivity and the reaction time of sensor, and be easy to surface clean, maintenance.
2, the platinum loop of sensor of the present invention and platinum-rhodium thermocouple design has guaranteed the application in different operating modes, satisfies the requirement that process flow rate changes, and has improved the monitoring accuracy and the scope of application of instrument.
3, the present invention selects advanced RM integrated circuit for use, and 12 A/D conversion has guaranteed the high precision of measuring, and can be implemented in the friendly human-machine interface under the Window interface, and Operation and Maintenance is more convenient.
4, the present invention adopts the portable large capacity rechargeable battery, has alleviated instruments weight, and does not need to provide external power source when using, and is therefore easy to carry, detects flexibly, simple to operate.
Description of drawings
Fig. 1 is a sulphuric acid dew point monitoring analyzer structural representation of the present invention;
Fig. 2 is a sulphuric acid dew point monitoring analyzer sensor construction synoptic diagram of the present invention;
Fig. 3 is a sulphuric acid dew point monitoring analyzer circuit theory connection diagram of the present invention.
Embodiment
Understand technical scheme of the present invention for one of ordinary skill in the art can be known, existing the invention will be further described in conjunction with the accompanying drawings:
A kind of sulphuric acid dew point monitoring analyzer, as Fig. 1, Fig. 2 and shown in Figure 3, comprise the master control borad 14 that is arranged in the mainframe box 1, signal amplification unit 15, frequency generator 11, primary power 12, signal amplification unit 15 can be realized the A/D conversion, and be connected with sensor 2 by signal wire 3, the front end setting of sensor 2 has the shell 21 of heatproof glass-encapsulated, the middle part is provided with platinum loop 23, be provided with platinum Pt Rh platinum thermopair 22 in the platinum loop 23, signal amplification unit 15 is connected with the master control borad 14 with windows RM operating system, can realize the friendly customer interaction interface, mainframe box 1 upper surface is provided with thermometer 7, reometer 8, thermometer 7, reometer 8 is connected with master control borad 14 by signal wire 3, sensor 2 centers be provided be arranged on mainframe box 1 on the cooling air channels 6 that is connected of external cooling air intake 4, mainframe box 1 is provided with power switch 16, external master keyboard 9, display screen 10 and output unit 13, output unit 13 connects the existing equipment of control industry spot, be provided with cooling air variable valve 5 above the mainframe box 1, be used to regulate the cooling air size that enters into cooling air channels 6 by cooling air intake 4.Frequency generator 11 can be the power supply of a scalable frequency of sensor 2 outputs, and primary power 12 of the present invention can be an external power supply, simultaneously, also is provided with a jumbo accumulator as standby.
During detection, with the air preheater that is used for power plant is example, take apparatus of the present invention to scene, can use external power supply, also the large-capacity battery that can substitute the bad for the good in advance with inside of the present invention is as power supply, turn on the power switch, instrument is started working, the cooling air of industry spot is imported from cooling air intake, sensor is put into flue, and feed cooling air in the endosexine of shell 21 and begin to be deposited on shell 21 extexines up to acid with heatproof glass-encapsulated with heatproof glass-encapsulated, regulate cooling air variable valve 5, observe the variation of reometer 8, when the reading of reometer 8 obtains stationary value, the temperature that platinum Pt Rh platinum thermopair 22 is measured sends signal amplifier to by signal wire, send master control borad to by signal amplifier again, be sent to thermometer 7 and be presented on the thermometer 7 from master control borad, at this moment thermometer 7 shown temperature are exactly the acid dew point in the flue gas, the present invention can be provided with parameter by being arranged on the outer master keyboard of cabinet, and change by temperature and the electric current that display is observed sensor front end, so that regulate the flow of cooling air at any time.
Claims (2)
1. sulphuric acid dew point monitoring analyzer, comprise the master control borad (14) that is arranged in the mainframe box (1), signal amplification unit (15), frequency generator (11), primary power (12), it is characterized in that, described signal amplification unit (15) is connected with sensor (2) by signal wire (3), the front end setting of described sensor (2) has the shell (21) of heatproof glass-encapsulated, the middle part of described sensor (2) front end is provided with platinum loop (23), be provided with platinum Pt Rh platinum thermopair (22) in the described platinum loop (23), described signal amplification unit (15) is connected with described master control borad (14), also be provided with thermometer (7) on described mainframe box (1) panel, reometer (8), described thermometer (7), reometer (8) is connected with master control borad (14) by signal wire (3), described sensor (2) center be provided be arranged on described mainframe box (1) on the cooling air channels (6) that is connected of external cooling air intake (4).
2. sulphuric acid dew point monitoring analyzer according to claim 1, it is characterized in that, also be provided with power switch (16), external master keyboard (9), display screen (10) and output unit (13) on the described mainframe box (1), also be provided with above the described mainframe box (1) and regulate the cooling air variable valve (5) that enters into the cooling air size of described cooling air channels (6) by cooling air intake (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100937979A CN101566593B (en) | 2008-04-21 | 2008-04-21 | Sulphuric acid dew point monitoring analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100937979A CN101566593B (en) | 2008-04-21 | 2008-04-21 | Sulphuric acid dew point monitoring analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN101566593A CN101566593A (en) | 2009-10-28 |
| CN101566593B true CN101566593B (en) | 2010-12-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156093A (en) * | 2011-01-28 | 2011-08-17 | 西安交通大学 | Test device for study on low-temperature corrosion of flue gas |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115943B (en) * | 2013-01-11 | 2015-08-12 | 安徽省建筑工程质量监督检测站 | Electronics hollow-glass dew-point tester |
| CN103364438B (en) * | 2013-07-16 | 2015-02-25 | 山东大学 | Method for determining acid dew point of boiler flue gas engineering |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995956A (en) * | 2006-12-31 | 2007-07-11 | 中电投远达环保工程有限公司 | Method and device for detecting SO3 content in flue gas |
| CN201177610Y (en) * | 2008-04-21 | 2009-01-07 | 北京华圣金程科技有限公司 | Sulfuric acid dew point monitoring analyzer |
-
2008
- 2008-04-21 CN CN2008100937979A patent/CN101566593B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995956A (en) * | 2006-12-31 | 2007-07-11 | 中电投远达环保工程有限公司 | Method and device for detecting SO3 content in flue gas |
| CN201177610Y (en) * | 2008-04-21 | 2009-01-07 | 北京华圣金程科技有限公司 | Sulfuric acid dew point monitoring analyzer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156093A (en) * | 2011-01-28 | 2011-08-17 | 西安交通大学 | Test device for study on low-temperature corrosion of flue gas |
| CN102156093B (en) * | 2011-01-28 | 2014-04-23 | 西安交通大学 | Test device for study on low-temperature corrosion of flue gas |
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| Publication number | Publication date |
|---|---|
| CN101566593A (en) | 2009-10-28 |
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Address after: 100085 Beijing city Haidian District East Road on the 1st house, a power surplus building E block 204 Patentee after: Beijing Huashengjingcheng Science & Technology Co., Ltd. Address before: 100085, Beijing, Haidian District on the road No. 2, building 2, international pioneer park 13C Patentee before: Beijing Huashengjingcheng Science & Technology Co., Ltd. |