CN203385657U - Sensing system applied to online monitoring of SO2 concentration in sulfur acid-making process - Google Patents
Sensing system applied to online monitoring of SO2 concentration in sulfur acid-making process Download PDFInfo
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- CN203385657U CN203385657U CN201320350754.0U CN201320350754U CN203385657U CN 203385657 U CN203385657 U CN 203385657U CN 201320350754 U CN201320350754 U CN 201320350754U CN 203385657 U CN203385657 U CN 203385657U
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- measuring cell
- sensor
- ultraviolet
- quartz glass
- based system
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Abstract
The utility model belongs to the technical field of analysis instruments and in particular relates to a sensing system applied to online monitoring of SO2 concentration in a sulfur acid-making system. The sensing system comprises a stainless steel measurement pool, wherein the two ends of the measurement pool are sealed by ultraviolet transmittable quartz glass pieces; a photoelectric conversion system and an ultraviolet light source are arranged at the outer ends of the quartz glass pieces respectively; a coil pipe with an air inlet and an air outlet is wound at the periphery of the measurement pool; a heating device, a temperature control device and an insulation layer are arranged at the outer side of the coil pipe; the photoelectric conversion system and the temperature control device are connected with a computer system. According to the sensing system, the SO2 concentration is measured by selecting an ultraviolet wavelength with higher SO2 absorption as a characteristic wavelength by a characteristic that absorptions of specific materials on ultraviolet rays with different wavelengths are different based on an ultraviolet photometric method principle and comparing the changes of the light intensities before and after SO2 absorption, so that the influence of other components in flue gas on SO2 measurement can be neglected; meanwhile, the constant temperature of the system is more than 120 DEG C, so that the influence of water vapor and acid mist condensation on a gas path system can be effectively removed.
Description
Technical field
The utility model belongs to technical field of analytical instruments, specifically a kind of for SO in sulphur-burning sulphuric acid system
2gas concentration is carried out the sensor-based system of on-line monitoring.
Background technology
At present, the SO that measures commonly used in industrial analysis instrument
2the instrument of gas concentration is not suitable for the technological requirement of acid production with sulphur as thermal-conductivity type gas analyser etc.Contain a large amount of S0 in the acid production with sulphur flue gas
3and free acid, be difficult to get rid of totally, have a strong impact on the heat-conducted SO of Denging
2the phenomenons such as gas circuit obstruction, very easily appear in the normal use of analyser, affects its long-time stability.
Summary of the invention
The purpose of this utility model provides a kind of acid production with sulphur SO that is applied to
2the sensor-based system of concentration on-line monitoring.
The technical scheme that the utility model is dealt with problems is: be applied to acid production with sulphur SO
2the sensor-based system of concentration on-line monitoring, is characterized in that it comprises the stainless steel measuring cell, the sealed at both ends quartz glass plate that the transmissive ultraviolet light is arranged of measuring cell, and there are respectively photo-translating system and ultraviolet source in the outer end of quartz glass plate; The periphery of measuring cell is wound with the coil pipe with gas inlet and outlet, and there are heating, attemperating unit and heat-insulation layer in the coil pipe outside; Described photo-translating system is connected computer system with attemperating unit.
Usually, the described photoelectricity dress system of changing comprises measurement optical filter and the reference optical filter with photoelectric tube, and photoelectric tube connects signal processing circuit.
Described heating, attemperating unit comprise heating tape, thermometric platinum resistance and temperature switch.
The described heat-insulation layer outside with measuring cell fixing by the insulation baffle plate.
Described quartz glass plate is fixed in the measuring cell two ends by PPS plastic partition hot tie-in part.
Described photo-translating system and ultraviolet source connect measuring cell by stainless steel adapting piece.
Sensor-based system of the present utility model, take a stainless steel measuring cell as basis, both sides are with the sealing of the quartz glass plate of transmissive ultraviolet light, under computer system control, by heating element by its thermostatic control in a certain particular job temperature (general > 120 ℃).Sample gas is introduced by draft tube, after the coil pipe on being wrapped in the measuring cell body fully heats, enters measuring cell, then is drawn and be back to process pipe by escape pipe.Ultraviolet source sends continuous ultraviolet spectrum, through gas to be measured, fully absorbs, and sees through SO
2absorb larger characteristic wavelength and measure optical filter and SO
2after non-absorbent reference wavelength optical filter, by photoelectric tube, light signal is converted to electric signal, the two paths of signals difference i.e. corresponding SO
2gas concentration.
The utility model is based on the Ultraviolet Photometric Method principle, and utilizing predetermined substance is to be different characteristic to the absorption of the ultraviolet light of different wave length, selects a SO
2absorb larger ultraviolet wavelength as characteristic wavelength, by comparing SO
2before and after absorbing, the variation of light intensity completes SO
2the measurement of gas concentration.Like this in flue gas other component to SO
2measuring impact can ignore, and simultaneity factor constant temperature, more than 120 ℃, can effectively be eliminated the impact of steam acid mist condensation on air-channel system.
The accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the utility model embodiment system.
Fig. 2 is photoelectric commutator structural representation in embodiment.
Fig. 3 is temperature control constant temperature system structural representation in embodiment.
In figure, 1: photo-translating system; 2: stainless steel adapting piece; 3: the insulation baffle plate; 4:PPS plastic partition hot tie-in part; 5: quartz glass plate; 6: draft tube; 7: muffler; 8: heating tape; 9: heat-insulation layer; 10: the thermometric platinum resistance; 11: ultraviolet source; 12: the Temperature protection switch; 13: measuring cell; 14: coil pipe; 15: the photoelectricity base; 16: signal processing circuit; 17: measure optical filter; 18: the reference optical filter; 19: photoelectric tube.
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is further illustrated.
Embodiment; As shown in Figure 1, it comprises stainless steel measuring cell 13 to the present embodiment sensor-based system structure, the sealed at both ends quartz glass plate 5 that the transmissive ultraviolet light is arranged of measuring cell 13, and there are respectively photo-translating system 1 and ultraviolet source 11 in the outer end of quartz glass plate 5; The periphery of measuring cell 13 is wound with the coil pipe 14 with gas inlet and outlet, and there are heating, attemperating unit and heat-insulation layer 9 in coil pipe 14 outsides; Described photo-translating system 1 is connected computer system with attemperating unit.
In example shown in Fig. 1: stainless steel measuring cell 13, using quartz glass plate 5 and be aided with Tetrafluoro spacer as pond body sealing and optical window in both sides; Under computer system control, by heating element heating tape 8 by whole measuring cell thermostatic control working temperature (general > 120 ℃), the temperature that thermometric platinum resistance 10 is measured measuring cell is sent into computing machine comparison set temperature difference and is added heat control, and Temperature protection switch 12 cuts off heating power supply as the protective device of heating system under the system temperature out-of-control condition; Heat-insulation layer 9 adopts composite silicate thermal insulation material that whole measuring system is incubated to prevent that heat runs off, and coordinates the fixing whole heat-insulation layer of insulation baffle plate 3; PPS plastic partition hot tie-in part 4 is fixed isolated heating system heat in measuring cell 13 two ends time by quartz glass plate 5 and propagates to two ends photo-translating system 1 and ultraviolet source 11 parts, prevents the normal operation of these two parts of temperatures involved; Stainless steel adapting piece 2 connects measuring cell 13 and photo-translating system 1 and ultraviolet source 11; Gas to be measured is introduced by draft tube 6, fully after heating, enters measuring cell through the coil pipe 14 on being wrapped in the measuring cell body, then is drawn and be back to process pipe by escape pipe 7; Ultraviolet source 11 sends measuring chamber that continuous ultraviolet spectrum sees through quartz glass plate 5 sealings after the sample aspiration is received, and sends into photo-translating system 1 and carries out signal conversion processes.
As shown in Figure 2, the ultraviolet signal after the sample aspiration is received converts light signal to electric signal by photoelectric tube 19 after seeing through and measuring optical filter 17 and reference optical filter 18 to photo-translating system in embodiment, through the corresponding SO of signal processing circuit 16 output
2the electric signal of gas concentration to computing machine is processed.
Temperature control system in embodiment as shown in Figure 3, send into computing machine comparison set temperature difference and added heat control by the temperature that thermometric platinum resistance 10 is measured measuring cell, and heating power supply is connected to heating element heating tape 8 by Temperature protection switch 12.When system temperature is out of control while heating always, while surpassing Temperature protection switch setting value, the automatic cutout of Temperature protection switch, cut off heating power supply, thereby protect whole sensor-based system.
Claims (6)
1. a sensor-based system that is applied to acid production with sulphur SO2 concentration on-line monitoring, it is characterized in that it comprises the stainless steel measuring cell, the sealed at both ends quartz glass plate that the transmissive ultraviolet light is arranged of measuring cell, there are respectively photo-translating system and ultraviolet source in the outer end of quartz glass plate; The periphery of measuring cell is wound with the coil pipe with gas inlet and outlet, and there are heating, attemperating unit and heat-insulation layer in the coil pipe outside; Described photo-translating system is connected computer system with attemperating unit.
2. sensor-based system as claimed in claim 1, is characterized in that the described photoelectricity dress system of changing comprises measurement optical filter and the reference optical filter with photoelectric tube, and photoelectric tube connects signal processing circuit.
3. sensor-based system as claimed in claim 1, is characterized in that described heating, attemperating unit comprise heating tape, thermometric platinum resistance and temperature switch.
4. sensor-based system as claimed in claim 1, is characterized in that described heat-insulation layer is fixed in the outside of measuring cell by the insulation baffle plate.
5. sensor-based system as claimed in claim 1, is characterized in that described quartz glass plate is fixed in the measuring cell two ends by PPS plastic partition hot tie-in part.
6. sensor-based system as claimed in claim 1, is characterized in that described photo-translating system and ultraviolet source connect measuring cell by stainless steel adapting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320350754.0U CN203385657U (en) | 2013-06-19 | 2013-06-19 | Sensing system applied to online monitoring of SO2 concentration in sulfur acid-making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320350754.0U CN203385657U (en) | 2013-06-19 | 2013-06-19 | Sensing system applied to online monitoring of SO2 concentration in sulfur acid-making process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203385657U true CN203385657U (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320350754.0U Expired - Lifetime CN203385657U (en) | 2013-06-19 | 2013-06-19 | Sensing system applied to online monitoring of SO2 concentration in sulfur acid-making process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064039A (en) * | 2017-04-19 | 2017-08-18 | 中国电子科技集团公司第四十九研究所 | A kind of detection method of ozone monitoring sensor and its ozone concentration based on phase lock amplifying technology |
| CN108918421A (en) * | 2018-09-04 | 2018-11-30 | 深圳市卡普瑞环境科技有限公司 | A kind of gas-heating apparatus suitable for optical cavity structure |
-
2013
- 2013-06-19 CN CN201320350754.0U patent/CN203385657U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064039A (en) * | 2017-04-19 | 2017-08-18 | 中国电子科技集团公司第四十九研究所 | A kind of detection method of ozone monitoring sensor and its ozone concentration based on phase lock amplifying technology |
| CN108918421A (en) * | 2018-09-04 | 2018-11-30 | 深圳市卡普瑞环境科技有限公司 | A kind of gas-heating apparatus suitable for optical cavity structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: China Petroleum & Chemical Corp. Patentee before: RESEARCH INSTITUTE OF NANJING CHEMICAL INDUSTRIAL Group |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |