CN107290280A - A kind of online gas concentration measuring apparatus for Caprolactam unit - Google Patents
A kind of online gas concentration measuring apparatus for Caprolactam unit Download PDFInfo
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- CN107290280A CN107290280A CN201610192408.2A CN201610192408A CN107290280A CN 107290280 A CN107290280 A CN 107290280A CN 201610192408 A CN201610192408 A CN 201610192408A CN 107290280 A CN107290280 A CN 107290280A
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- gas concentration
- cooler
- drying chamber
- lime set
- measuring apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A kind of online gas concentration measuring apparatus for Caprolactam unit includes the cooler being located in feed channel, and cooler is connected with knockout drum, and knockout drum is connected with drying chamber, and drying chamber is connected with measuring cylinder, and laser oxygen instrument is located at measuring cylinder one end；The cooler casing surface is provided with heat exchange pipeline, and heat exchange pipeline is passed through the temperature in cooling medium reduction housing of cooler body；The laser oxygen instrument includes test component, reflecting prism, is provided with channel lumens between test component and reflection rib ytterbium, drying chamber is connected by channel lumens with measuring cylinder, purging tracheae alignment reflecting prism.It is an advantage of the current invention that it is simple in construction, influence of the complex working condition to the normal measurement of equipment and instrument can be excluded, the measurement accuracy of gas concentration is improved.
Description
Technical field
The present invention relates to the equipment of on-line determination gas concentration, the online gas concentration measuring apparatus of Caprolactam unit is particularly suitable for use in.
Background technology
The stills for air blowing of pimelinketone device, the oxidizing tower of hydrogen peroxide plant, the equipment such as the reactor of oximes device have higher requirement and standard to the content measurement of oxygen in tail gas, to the measurement accuracy of on-line analysis instrument, response speed and reliability requirement more and more higher.
In order to reduce the influence to measurement accuracy and reliability of dust, humidity, temperature of detection sample, traditional on-line analysis system such as chromatograph, electrochemical analyser, magnetic oxygen analyser often needs the pretreatment system of complexity.The application of pretreatment system adds sample process time, generates the pure delay time of analysis, can also increase considerably the fault rate and maintenance workload of system operation.
Although electrochemical analyser can in site measurement, sensor drift is big, short life the shortcomings of limit its application.In addition, the current traditional NDIR spectroscopic gas analytical technology for being widely used in process industry is because using optical filter wideband light source, easily there is cross jamming in detected sample gas pipeline, and be constantly subjected to background gas in the detection of microcomponent influences, the problems such as producing big drift.
The content of the invention
The present invention provides a kind of online gas concentration measuring apparatus for Caprolactam unit, can exclude influence of the complex working condition to the normal measurement of equipment and instrument, improves the measurement accuracy of gas concentration.
Realize the technical scheme is that, a kind of online gas concentration measuring apparatus for Caprolactam unit includes the cooler being located in feed channel, cooler is connected with knockout drum, knockout drum is connected with drying chamber, drying chamber is connected with measuring cylinder, and laser oxygen instrument is located at measuring cylinder one end；
The cooler casing surface is provided with heat exchange pipeline, and heat exchange pipeline is passed through the temperature in cooling medium reduction housing of cooler body；
The laser oxygen instrument includes test component, reflecting prism, is provided with channel lumens between test component and reflection rib ytterbium, drying chamber is connected by channel lumens with measuring cylinder, purging tracheae alignment reflecting prism.
Further, the measuring cylinder is connected by No. three condensate drain valves with tail gas lime set tank.
Further, the knockout drum is connected by a condensate drain valve with tail gas lime set tank.
The drying chamber is connected by No. two condensate drain valves with tail gas lime set tank.
Further, the tail gas lime set tank is connected with lime set drawing pump.
It is an advantage of the invention that it is simple in construction, determine gas concentration accurately, adapt in complicated work condition environment.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is laser oxygen instrument structural representation.
As schemed, cooler 1, knockout drum 2, drying chamber 3, drier 4, measuring cylinder 5, tail gas lime set tank 6, lime set tank liquid level gauge 7, a condensate drain valve 8, No. two condensate drain valves 9, No. three condensate drain valves 10, laser oxygen instrument 11, extension reflex rib ytterbium 12, lime set drawing pump 13, test component 14, channel lumens 15.
Embodiment
As in Fig. 1, a kind of online gas concentration measuring apparatus for Caprolactam unit includes the cooler 1 being located in feed channel, and cooler 1 is connected with knockout drum 2, knockout drum 2 and drying chamber 3（Desiccant-filled 4 in drying chamber 3）Connection, drying chamber 3 is connected with measuring cylinder 5, and laser oxygen instrument 11 is located at the one end of measuring cylinder 5；
The surface of shell of cooler 1 is provided with heat exchange pipeline, and heat exchange pipeline is passed through the temperature in cooling medium reduction housing of cooler body, it is preferred that select plate type heat exchanger or similar heat transmission equipment, cooling medium is from media such as chilled water or gases；
As in Fig. 2, laser oxygen instrument 11 includes test component 14, reflecting prism 12, channel lumens 15 are provided between test component 14 and reflection rib ytterbium 12, during work, test component 14 emits beam through channel lumens 15, then reflected by reflection rib ytterbium 12, and light is again passed by channel lumens 15 and is tested part 14 and received, test component 14 obtains the numerical value for drawing gas concentration after signal by processing；Drying chamber 3 is connected by channel lumens 15 with measuring cylinder 5, purges tracheae（The inert gases such as the nitrogen of purge gass Bottomhole pressure 99.999%）Outlet alignment reflecting prism, during work, the inert gases such as nitrogen directly purge reflection rib ytterbium 12, are avoided that during inspecting solid and liquid mixture are attached to the significantly decline for reflecting on rib ytterbium 12 and causing laser projection light intensity for a long time, while to control purge flow rate（8-10L/h）, prevent excessive high pure nitrogen or inert gas from have impact on the normal measurement of process gas.
It is preferred that, measuring cylinder 5 passes through No. three condensate drain valves 10 and tail gas lime set tank 6（Tail gas lime set tank 6 is provided with lime set tank liquid level gauge 7）Connection.
It is preferred that, knockout drum 2 is connected by a condensate drain valve 8 with tail gas lime set tank 6；
It is preferred that, drying chamber 3 is connected by No. two condensate drain valves 9 with tail gas lime set tank 6.
It is preferred that, tail gas lime set tank 6 is connected with lime set drawing pump 13.
Operation principle, tested process piping gas first passes through cooler 1, then to knockout drum 2, the gas phase portion of knockout drum 2 arrives drying chamber 3, sample gas is further dried again, and the gas phase portion of drying chamber 3 enters back into laser oxygen instrument 11（Laser oxygen instrument reflecting prism 12 is purged online with inert gases such as high pure nitrogens, it is ensured that minute surface it is clean）Measure entrance（The entrance of channel lumens 15, and in channel lumens complete gas concentration measurement）, measuring cylinder 5 is then entered back into, No. three condensate drain valves 10 are installed below measuring cylinder 5, by exhaust emissions to tail gas lime set tank 6；Lime set is emitted into tail gas lime set tank 6 by knockout drum 2, drying chamber 3 by a condensate drain valve 8, No. two condensate drain valves 9 respectively, and respective discharge pipe line is inserted into position of the tail gas lime set tank below 50%, Liquid level is more than 65%, it is ensured that be not in the situation of string pressure.Lime set is got among tail gas absorption liquid bath or other exhaust collection equipment using lime set drawing pump 13 and reclaimed, and by DCS logic associations, by the automatic start-stop of lime set drawing pump 13 by the Liquid level of lime set tank 6 65% or so.
Claims (4)
1. a kind of online gas concentration measuring apparatus for Caprolactam unit, it is characterized in that：The online gas concentration measuring apparatus includes the cooler being located in feed channel, and cooler is connected with knockout drum, and knockout drum is connected with drying chamber, and drying chamber is connected with measuring cylinder, and laser oxygen instrument is located at measuring cylinder one end；
The cooler casing surface is provided with heat exchange pipeline, and heat exchange pipeline is passed through the temperature in cooling medium reduction housing of cooler body；
The laser oxygen instrument includes test component, reflecting prism, is provided with channel lumens between test component and reflection rib ytterbium, drying chamber is connected by channel lumens with measuring cylinder, purging tracheae alignment reflecting prism.
2. a kind of online gas concentration measuring apparatus for Caprolactam unit according to claim 1, it is characterized in that：
The measuring cylinder is connected by No. three condensate drain valves with tail gas lime set tank.
3. a kind of online gas concentration measuring apparatus for Caprolactam unit according to claim 1, it is characterized in that：The knockout drum is connected by a condensate drain valve with tail gas lime set tank；
The drying chamber is connected by No. two condensate drain valves with tail gas lime set tank.
4. a kind of online gas concentration measuring apparatus for Caprolactam unit according to Claims 2 or 3, it is characterized in that：The tail gas lime set tank is connected with lime set drawing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192408.2A CN107290280A (en) | 2016-03-30 | 2016-03-30 | A kind of online gas concentration measuring apparatus for Caprolactam unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192408.2A CN107290280A (en) | 2016-03-30 | 2016-03-30 | A kind of online gas concentration measuring apparatus for Caprolactam unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107290280A true CN107290280A (en) | 2017-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610192408.2A Pending CN107290280A (en) | 2016-03-30 | 2016-03-30 | A kind of online gas concentration measuring apparatus for Caprolactam unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107290280A (en) |
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2016
- 2016-03-30 CN CN201610192408.2A patent/CN107290280A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171024 |
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| WD01 | Invention patent application deemed withdrawn after publication |