CN107101858B - Online analysis instrument pretreatment and protection system - Google Patents
Online analysis instrument pretreatment and protection system Download PDFInfo
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- CN107101858B CN107101858B CN201710350125.0A CN201710350125A CN107101858B CN 107101858 B CN107101858 B CN 107101858B CN 201710350125 A CN201710350125 A CN 201710350125A CN 107101858 B CN107101858 B CN 107101858B
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- 238000004458 analytical method Methods 0.000 title claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 230000006870 function Effects 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 8
- 238000011045 prefiltration Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 231100000331 toxic Toxicity 0.000 claims description 6
- 230000002588 toxic effect Effects 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000005536 corrosion prevention Methods 0.000 abstract description 3
- 238000007791 dehumidification Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an on-line analysis instrument pretreatment and protection system which comprises a pretreatment function module, a back flushing function module, a calibration function module, an automatic control and protection function module and a later recovery function module. The invention realizes automation of filtration, dust removal, temperature reduction, depressurization, dehumidification, corrosion prevention, calibration and the like through automatic detection and control of various indexes before the sampled gas enters the meter, realizes emergency protection treatment on the analyzer through the interlocking protection system, effectively protects expensive analysis meters, directly reduces more than hundreds of thousands of millions of loss, effectively improves the monitoring performance and the service cycle of the analysis meters, greatly improves the accuracy of industrial control indexes and environmental protection data, reduces production accidents and environmental pollution, and brings benefits to enterprises and society indirectly.
Description
Technical Field
The invention relates to the field of chemical industry detection, in particular to an online analysis instrument pretreatment and protection system which is used for pretreating and monitoring gas to be detected so as to protect an analyzer from being damaged.
Background
The large-scale online gas analysis instrument is an indispensable monitoring device in the fields of chemical production, environmental protection and the like, and is a fundamental task of process analysis, wherein the method is used for rapidly, accurately and stably analyzing the component parameters of the industrial process for a long period. However, since the technology in this field is relatively weak in China, most of such products are imported and are relatively expensive. And the product has very strict requirements on the conditions of temperature, pressure, dust amount, corrosiveness, water content and the like of a sample entering the instrument. Once the index exceeds the performance requirement of the instrument, the instrument is stopped when the index is light, the monitoring is stopped, the instrument is damaged when the index is heavy, and hidden danger is brought to the production and the environment.
At present, in order to ensure the normal operation of the analysis instrument, many instrument manufacturers are provided with pretreatment facilities, but most of the pretreatment facilities are between manual operation and semiautomatic operation, and the pretreatment facilities have more manual intervention factors, so that the abnormal working condition of the analysis instrument is inevitably caused due to different technical levels and responsibility of each person. Because the existing pretreatment is mostly manually adjusted, if the system parameters are not timely adjusted when changed, the medium index entering the analysis instrument exceeds the bearable range, and the instrument is abnormal or even damaged.
Disclosure of Invention
The invention designs an online analysis instrument pretreatment and protection system aiming at the defects of the prior art, and realizes automation of filtration, dust removal, temperature reduction, pressure reduction, dehumidification, corrosion prevention, calibration and the like by automatically detecting and controlling various indexes before the sampled gas enters the meter, and realizes emergency protection treatment on the analyzer by an interlocking protection system.
The invention adopts the following scheme to realize the purposes: an on-line analysis instrument pretreatment and protection system comprises a pretreatment function module, a back flushing function module, a calibration function module, an automatic control and protection function module and a later recovery function module;
the pretreatment functional module comprises a pre-filter and a pressure, temperature and flow parameter detection device which are arranged on a process gas pipeline, wherein the pre-filter is respectively connected with the pretreatment functional module and the back flushing functional module through pipelines, and the pressure, temperature and flow parameter detection device is electrically connected with the automatic control and protection functional module;
the pretreatment functional module comprises a water removal device and a pumping device, and the air inlet end of the pretreatment functional module is connected with a front filter in the pretreatment functional module through a pipeline;
one end of the back flushing functional module is connected with an instrument wind, and the other end of the back flushing functional module is connected with the front filter;
the calibration functional module comprises a measuring range calibration device and a zero point calibration device, one end of the calibration functional module is connected with the air outlet end of the pretreatment functional module, and the other end of the calibration functional module is connected with an analyzer;
the automatic control and protection function module monitors parameters of the whole system and controls on-off of each module;
and the later recovery functional module is connected with the gas outlet end of the analyzer and is used for recovering the detected sample gas.
Furthermore, a pressure sensor, a temperature sensor and a humidity sensor are further arranged between the preprocessing functional module and the calibration functional module, and the pressure sensor, the temperature sensor and the temperature sensor are electrically connected with the automatic control and protection functional module.
Furthermore, the automatic control and protection function module adopts a Siemens PLC 200SMART system as a controller.
Furthermore, the pipeline between the pretreatment functional module and the pretreatment functional module as well as the back flushing functional module is provided with an electric tracing band.
Further, the pretreatment functional module is also provided with a vent solenoid valve connected with a pipeline.
Furthermore, the automatic control and protection function module further comprises an alarm device, a display screen and a memory.
Furthermore, a toxic and harmful gas alarm instrument is also arranged in the pretreatment functional module, and the toxic and harmful gas alarm instrument is electrically connected with the automatic control and protection functional module.
Further, the water removal device comprises a precision filter arranged at the air inlet end of the pretreatment functional module and a cyclone condenser arranged at the air outlet end of the pretreatment functional module, wherein the cyclone condenser is connected with an instrument wind.
Further, a liquid level switch is arranged on the liquid collector at the lower part of the cyclone condenser.
Compared with the prior art, the invention has the following advantages and beneficial effects: the method has the advantages that the automation of filtration, dust removal, temperature reduction, depressurization, dehumidification, corrosion prevention, calibration and the like is realized through the automatic detection and control of various indexes before the sampled gas enters the meter, the emergency protection treatment is realized on the analyzer through the interlocking protection system, the expensive analyzer is effectively protected, the loss is reduced by hundreds of thousands or more, millions of the loss is directly reduced, the monitoring performance and the service cycle of the analyzer are effectively improved, the accuracy of industrial control indexes and environmental protection data is greatly improved, the production accidents and environmental pollution are reduced, and the indirect benefits are brought to enterprises and society.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
As shown in FIG. 1, the system comprises six modules, namely a pretreatment function module, a back flushing function module, a calibration function module, an automatic control and protection function module and a later recovery function module.
The pretreatment functional module comprises a pre-filter 101 and a pressure, temperature and flow parameter detection device which are arranged on a process gas pipeline, wherein the pre-filter 101 collects a gas sample and performs preliminary filtration, the pre-filter 101 is respectively connected with the pretreatment functional module and the back flushing functional module through pipelines, and the pressure, temperature and flow parameter detection device is electrically connected with the automatic control and protection functional module;
the pretreatment functional module comprises a water removal device and a pumping device, and the air inlet end of the pretreatment functional module is connected with a pre-filter 101 in the pretreatment functional module through a pipeline;
one end of the back flushing functional module is connected with an instrument wind, and the other end of the back flushing functional module is connected with the front filter 101;
the calibration functional module comprises a measuring range calibration device 201 and a zero point calibration device 202, one end of the calibration functional module is connected with the air outlet end of the pretreatment functional module, and the other end of the calibration functional module is connected with an analyzer 3;
the automatic control and protection function module monitors parameters of the whole system and controls on-off of each module;
the later recovery functional module is connected with the air outlet end of the analyzer 3 and is used for recovering the detected sample gas and avoiding secondary pollution to the environment caused by random discharge.
And a pressure sensor 401, a temperature sensor 402 and a humidity sensor 403 are further arranged between the preprocessing functional module and the calibration functional module, and the pressure sensor 401, the temperature sensor 402 and the temperature sensor 403 are electrically connected with the automatic control and protection functional module.
The automatic control and protection function module adopts a Siemens PLC 200SMART system as a controller, and also comprises an alarm device, a display screen and a memory. The upper computer selects Siemens 7 inch screen, and displays alarm and interlocking control for flow, pressure, temperature and other parameters, and makes history trend record. The upper computer is provided with a data uploading function interface.
The pipeline between the pretreatment function module, the pretreatment function module and the back flushing function module is provided with an electric tracing band 102. For the requirement of the pretreatment medium temperature condition, the system monitors the temperature of the sampling pipeline through a display screen, and realizes manual and automatic control of the electric tracing band 102 by setting high and low limits, so that the sampling pipeline is ensured not to generate effusion and the intake temperature of an analysis instrument meets the working requirement of the instrument.
The pretreatment function module is also provided with a vent solenoid valve 501 connected with a pipeline. And a toxic and harmful gas alarm instrument is further arranged in the pretreatment functional module, and the toxic and harmful gas alarm instrument is electrically connected with the automatic control and protection functional module.
The water removal device comprises a precise filter 502 arranged at the air inlet end of the pretreatment functional module and a cyclone condenser 503 arranged at the air outlet end of the pretreatment functional module, wherein the cyclone condenser 503 is connected with instrument wind. A liquid level switch 504 is arranged on the liquid collector at the lower part of the cyclone condenser 503. When the liquid level is high, the switch acts to cut off the sampling electromagnetic valve of the instrument and the air inlet electromagnetic valve of the analysis instrument, open the emptying electromagnetic valve 501 and output an alarm to ensure that the liquid does not enter the analysis instrument 3.
The automatic control and protection function module is a main module for improving the functions of the system, is matched with other modules of the system, improves the preprocessing capacity of the system by adopting a high-sensitivity detection element, an execution element and data processing software, and simultaneously controls and blocks some factors possibly causing damage to an analysis instrument. Firstly, the module is provided with pressure, temperature and flow monitoring on an analysis instrument measurement access pipeline, and when the pressure, temperature and humidity indexes of the analyzer exceed alarm values, an alarm lamp is lightened and flashes. When the index continues to increase beyond the work allowable value of the instrument, the instrument sampling electromagnetic valve and the analysis instrument air inlet electromagnetic valve are cut off, the system air outlet electromagnetic valve is opened, sampling is stopped, meanwhile, the instrument is set according to the production process, and the output value is kept or is returned to zero when the instrument sampling is stopped. The inside toxic and harmful gas alarm instrument that is equipped with of pretreatment systems, when pipeline and joint sealing department exist the leak source, when probably causing analysis instrument outside corruption or potential safety hazard, automatic cutout instrument sampling solenoid valve, analysis instrument solenoid valve that admits air open the system solenoid valve to output warning, protect analysis instrument effectively not corroded, and protect maintainer effectively not to hurt.
For the condition that the sampling link is easy to block, the system is provided with a back flushing functional module, when the manual switch of the operation screen is set to be in a purging state, a sampling electromagnetic valve (namely an electromagnetic valve arranged at the inlet of the front filter) is closed, an air inlet electromagnetic valve (an electromagnetic valve arranged at the front end of the analyzer) of the analysis instrument is closed, and an emptying electromagnetic valve 501 is opened. And the purging electromagnetic valve is opened after 5 seconds, and the sampling pipeline is purged through the instrument wind gas regulated by the filtering pressure reducing valve. The system can also start and stop the gas delivery pump through the system control screen (when the electromagnetic valve of the sampling system is closed due to any reasons, the air pump is automatically stopped), and when the air pump is accidentally stopped, the air inlet electromagnetic valve of the analysis instrument is closed and an alarm is output.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (6)
1. An on-line analysis instrument pretreatment and protection system is characterized in that: the device comprises a pretreatment function module, a back flushing function module, a calibration function module, an automatic control and protection function module and a later recovery function module;
the pretreatment functional module comprises a pre-filter and a pressure, temperature and flow parameter detection device which are arranged on a process gas pipeline, wherein the pre-filter is respectively connected with the pretreatment functional module and the back flushing functional module through pipelines, and the pressure, temperature and flow parameter detection device is electrically connected with the automatic control and protection functional module;
the pretreatment functional module comprises a water removal device and a pumping device, and the air inlet end of the pretreatment functional module is connected with a front filter in the pretreatment functional module through a pipeline;
one end of the back flushing functional module is connected with an instrument wind, and the other end of the back flushing functional module is connected with the front filter; the calibration functional module comprises a measuring range calibration device and a zero point calibration device, one end of the calibration functional module is connected with the air outlet end of the pretreatment functional module, and the other end of the calibration functional module is connected with an analyzer;
the automatic control and protection function module monitors parameters of the whole system and controls on-off of each module;
the later recovery functional module is connected with the gas outlet end of the analyzer and is used for recovering the detected sample gas;
a pressure sensor, a temperature sensor and a humidity sensor are further arranged between the preprocessing functional module and the calibration functional module, and the pressure sensor, the temperature sensor and the temperature sensor are electrically connected with the automatic control and protection functional module;
the pretreatment functional module is internally provided with a toxic and harmful gas alarm instrument which is electrically connected with the automatic control and protection functional module;
the water removal device comprises a precise filter arranged at the air inlet end of the pretreatment functional module and a cyclone condenser arranged at the air outlet end of the pretreatment functional module, and the cyclone condenser is connected with instrument wind.
2. The on-line analytical instrument pretreatment and protection system of claim 1, wherein: the automatic control and protection function module adopts Siemens PLC 200SMART system as a controller.
3. The on-line analytical instrument pretreatment and protection system of claim 1, wherein: and an electric tracing band is arranged on a pipeline between the pretreatment functional module and the pretreatment functional module as well as between the pretreatment functional module and the back flushing functional module.
4. The on-line analytical instrument pretreatment and protection system of claim 1, wherein: the pretreatment functional module is also provided with a vent electromagnetic valve connected with a pipeline.
5. The on-line analytical instrument pretreatment and protection system of claim 1, wherein: the automatic control and protection function module also comprises an alarm device, a display screen and a memory.
6. The on-line analytical instrument pretreatment and protection system of claim 1, wherein: the liquid accumulator at the lower part of the cyclone condenser is provided with a liquid level switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710350125.0A CN107101858B (en) | 2017-05-18 | 2017-05-18 | Online analysis instrument pretreatment and protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710350125.0A CN107101858B (en) | 2017-05-18 | 2017-05-18 | Online analysis instrument pretreatment and protection system |
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| CN107101858A CN107101858A (en) | 2017-08-29 |
| CN107101858B true CN107101858B (en) | 2024-01-09 |
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| CN201710350125.0A Active CN107101858B (en) | 2017-05-18 | 2017-05-18 | Online analysis instrument pretreatment and protection system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982765A (en) * | 2018-07-03 | 2018-12-11 | 深圳智人环保科技有限公司 | Minitype gas detection system and method with temperature and humidity pretreatment and benchmark zeroing |
| CN109656222A (en) * | 2019-01-24 | 2019-04-19 | 天华化工机械及自动化研究设计院有限公司苏州研究所 | Intelligent online analyzes pretreatment system |
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| CN102399036A (en) * | 2011-09-30 | 2012-04-04 | 天津市华宇膜技术有限公司 | Movable test guiding water plant for emergency treatment |
| CN203941102U (en) * | 2014-03-25 | 2014-11-12 | 南京霍普斯科技有限公司 | A kind of solid waste incineration is processed on-line analysis system |
| CN105865853A (en) * | 2016-05-16 | 2016-08-17 | 威海捷诺曼自动化科技有限公司 | Online analysis system of ship exhaust emission |
| CN205642942U (en) * | 2016-05-16 | 2016-10-12 | 威海捷诺曼自动化科技有限公司 | Boats and ships exhaust emission online analysis system |
-
2017
- 2017-05-18 CN CN201710350125.0A patent/CN107101858B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399036A (en) * | 2011-09-30 | 2012-04-04 | 天津市华宇膜技术有限公司 | Movable test guiding water plant for emergency treatment |
| CN203941102U (en) * | 2014-03-25 | 2014-11-12 | 南京霍普斯科技有限公司 | A kind of solid waste incineration is processed on-line analysis system |
| CN105865853A (en) * | 2016-05-16 | 2016-08-17 | 威海捷诺曼自动化科技有限公司 | Online analysis system of ship exhaust emission |
| CN205642942U (en) * | 2016-05-16 | 2016-10-12 | 威海捷诺曼自动化科技有限公司 | Boats and ships exhaust emission online analysis system |
Non-Patent Citations (1)
| Title |
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| 苏建伟 ; 刘波.现场型过程校验仪的设计方法.电子世界.2002,(第1期),全文. * |
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