CN102393324A - Sample pretreatment system of magnetic mechanical oxygen analyzer - Google Patents
Sample pretreatment system of magnetic mechanical oxygen analyzer Download PDFInfo
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- CN102393324A CN102393324A CN2011102201904A CN201110220190A CN102393324A CN 102393324 A CN102393324 A CN 102393324A CN 2011102201904 A CN2011102201904 A CN 2011102201904A CN 201110220190 A CN201110220190 A CN 201110220190A CN 102393324 A CN102393324 A CN 102393324A
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Abstract
The invention relates to a sample pretreatment system of a magnetic mechanical oxygen analyzer. The system comprises a washing tank and a waste liquid discharge pipeline, wherein the washing tank is provided with a liquid feed pipe connected with a sample pipeline and a washing water pipeline and a liquid discharge pipe for discharging washed waste liquid; the liquid discharge pipe is connected with the waste liquid discharge pipeline through a U-shaped pipe; and the waste liquid discharge pipeline is connected with a closed waste liquid collection system. The sample pretreatment system is characterized in that the liquid discharge pipe is provided with two outlets, wherein one of the two outlets is a liquid discharge port and the other one of the two outlets is an exhaust port; the liquid discharge port is connected with the waste liquid discharge pipeline; a gas-liquid separation tank is arranged between the waste liquid discharge pipeline and the waste liquid collection system; the mounting elevation of the gas-liquid separation tank is lower than that of an oxygen analyzer; the gas outlet of the gas-liquid separation tank is communicated with the atmosphere through a gas pipeline; the liquid outlet of the gas-separation tank is connected with the waste liquid collection system; and the exhaust port is connected with the gas pipeline through an exhaust pipe. The sample pretreatment system provided by the invention can ensure stable operation of an analysis unit of the oxygen analyzer.
Description
Technical field
The present invention relates to a kind of analytical equipment, specifically refer to a kind of magnetic mechanical formula oxygen analyzer sample pretreatment system.
Background technology
In some large-scale chemical plant installationss, oxygen analyzer need be set usually come the oxygen content in the on-line analysis reactive system, thereby control steadily carrying out of reaction.For example in the acrylonitrile installation, use the tail oxygen content of oxygen analyzer detection reaction device outlet reaction gas, to improving the vinyl cyanide product yield, the safety in production of assurance device has significance.
Magnetic mechanical formula oxygen analyzer is a kind of instrument and equipment of precision, costs an arm and a leg, and comprise that every of sample gas pretreatment unit is worth nearly million people people's coin, and the order time is long, needs to arrive half a year one-year age.The sample that the entering oxygen analyzer detects must be clean sample gas.With the acrylonitrile installation is example; The measuring chamber that requires according to magnetic mechanical formula oxygen analyzer forbids harmful component such as water, organic impurities to be invaded and the composition and the physicochemical characteristic of acrylonitrile reactor gas; The tested reaction gas that contains polymkeric substance such as crude acetonitrile that requirement is directly gathered from process pipe must be washed through the oxygen analyzer sample gas pretreating system, separates, lowers the temperature, dewaters, filters, just can meet the analyzing and testing condition after the link processing such as drying, decompression, current stabilization.
The workflow of existing oxygen analyzer sample gas pretreating system is: the reaction gas of from process pipe, sampling, warp fully mix with desalted water and converge, and harmful components such as the polymkeric substance in the reaction gas, grit is water-soluble, get into water washing tank 1 washing and separation then.The wet saturated appearance gas of isolating after the objectionable impurities is discharged from the water washing tank top, the entering cyclone separator filtration of cooling off and condense after gas-liquid separation once more, and the degree of depth is removed the moisture in kind gas, and appearance gas dewpoint temperature is reduced to below 10 ℃; Clean dry appearance gas is sent into the analyzing and testing unit of oxygen analyzer behind voltage stabilizing, current stabilization, the current signal that the oxygen concentration value that oxygen analyzer obtains analysis changes 4-20mADC into is sent to the safety in production control that the DCS system carries out device.Sample gas emptying after the analysis.The waste gas of emptying contains hydrogen cyanide etc. and extremely endangers gas, and directly emptying can cause serious environmental to pollute and hazard to person.
Oarse-grained fouls such as polymkeric substance in the reaction gas and dust under action of gravity and useless desalted water be expelled to the discharging of waste liquid system from the overflow vent of water washing tank together.Existing oxygen analyzer sample gas pretreating system is provided with the U-shaped pipe and guarantees the gas-liquid separation space in first water washing tank between the overflow vent of the first gas-liquid separation water washing tank and discharging of waste liquid system; But owing to receive the restriction of oxygen analyzer set of equipments volume; The height of this U-shaped pipe is difficult to guarantee gas-liquid separation space enough in the water washing tank, causes gas band liquid, liquid band gas phenomenon; In addition, can produce siphonage between U-shaped pipe and the discharging of waste liquid system, hinder smooth and easy, the quick discharge of waste liquid, can produce the waste liquid adverse current and get in the oxygen analyzer, cause the analytic unit of magnetic mechanical formula oxygen analyzer to be scrapped, cause economic loss.
Principle according to existing magnetic mechanical formula oxygen analyzer; Through the necessary normal pressure discharging of the waste liquid of sample gas pretreating system washing back generation; And waste liquid contains poisonous hazardous medium, does not allow directly to enter unlimited trench, must cause airtight process waste liquor exhaust system (being called for short the PS system).But in fact the PS system can produce pressure surge, because the back pressure that pressure surge produced in the discharging of waste liquid system can influence measuring accuracy and even cause the measuring chamber water inlet to damage instrument, this also is that oxygen analyzer institute is unallowed.Therefore the waste liquid of oxygen analyzer washing back generation must the normal pressure discharging.
Existing discharging of waste liquid and waste gas body blowdown system all can not satisfy country about the standard to safety, health, environmental protection.
Summary of the invention
Technical matters to be solved by this invention is that the present situation that is directed against prior art provides a kind of magnetic mechanical formula oxygen analyzer sample pretreatment system that can guarantee the analytic unit stable operation of oxygen analyzer.
Another technical matters to be solved by this invention provides a kind of magnetic mechanical formula oxygen analyzer sample pretreatment system that can guarantee the analytic unit stable operation of oxygen analyzer and satisfy environmental requirement.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this magnetic mechanical formula oxygen analyzer sample pretreatment system; Comprise water washing tank and discharging of waste liquid pipeline; Said water washing tank has the discharging tube of the discharging of waste liquid after the feed tube that is connected with the washings pipeline with the appearance air pipe washs with confession; Discharging tube connects the discharging of waste liquid pipeline through the U-shaped pipe, and this discharging of waste liquid pipeline connects airtight waste collection system; It is characterized in that described discharging tube has two outlets, one is leakage fluid dram, and one is exhausr port; Wherein, Described leakage fluid dram connects described discharging of waste liquid pipeline; Be provided with knockout drum between described discharging of waste liquid pipeline and the described waste collection system; The installation absolute altitude of this knockout drum is lower than the installation absolute altitude of oxygen analyzer, and the gas vent of said knockout drum is communicated with atmosphere through gas piping, and the liquid outlet of knockout drum connects waste collection system; Described exhausr port connects described gas piping through gas outlet.
Also be provided with the form that is used to show the waste water liquid level between the liquid outlet of said knockout drum and the described waste collection system; Pipeline between said form and the said knockout drum is provided with first valve, and the pipeline between said form and the said waste collection system is provided with second valve.The pressure surge situation that can observe the discharging of waste liquid pipeline easily and be attached thereto logical airtight technology PS system by the liquid level position that is shown in the form; Through regulating first valve and second valve can change the liquid level in the form; Thereby with the constant height and position of setting of the liquid level in the form; Thereby stablize the pressure on the discharging of waste liquid pipeline, avoid the influence of waste collection system pressure surge measuring accuracy.
As improvement, also be provided with the tensimeter that is used for observing gas piping and discharging of waste liquid pipeline pressure between said first valve and the said form.Can read the force value on gas exhaust piping and the drain line easily through tensimeter, thereby whether situation and exhaust, the drainage system of in time understanding the system pressure fluctuation produce back pressure.Preferably, also be provided with the 3rd valve of convenient maintenance between described tensimeter and the form.
In the above-mentioned scenarios, the caliber of said discharging tube can be greater than the caliber of said feed tube.The timely drainage water cleaning of evaporator of washes can be further guaranteed in this design, guarantees that washings are fresh in the water-washing process, thereby guarantees to wash effect.
In order to protect environment, the outlet of said gas piping can connect the catalytic burning device.
Existing oxygen analyzer because discharging of waste liquid is not smooth, usually causes the waste liquid adverse current to get into the analytic unit of oxygen analyzer, scraps oxygen analyzer.The user has to purchase impaired instrument again, and about about 450,000 yuans of the price of oxygen analyzer, causes also simultaneously that process units is compelled to stop, and the production economic loss of bringing because of parking is inestimable especially.
Compared with prior art; The present invention effectively breaks and has encircled the siphonage that produces in the discharging of waste liquid process through the design of gas outlet, has guaranteed the gas-liquid separation space in the water washing tank; Liquid level in the constant water washing tank; Avoid waste water to enter into the analytical equipment of oxygen analyzer, guaranteed carrying out smoothly of analysis, prolonged the serviceable life of oxygen analyzer; And the design of catalytic burning system can purify toxic harmful exhaust gas such as hydrogen cyanide, efficiently reaches 98%, has avoided environmental pollution and hazard to person, then makes more environmental protection of exhaust gas discharging.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention;
Fig. 2 is the synoptic diagram of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, this magnetic mechanical formula oxygen analyzer sample pretreatment system comprises:
Discharging of waste liquid pipeline 2 is connected on the port of discharging tube 12 belows, is used to discharge the waste liquid after the washing, is provided with one section " U " shape pipe 21 near the position of discharging tube 12, and the tail end of discharging of waste liquid pipeline 2 connects the inlet of following knockout drum 4.
Knockout drum 4, waste liquid that water washing tank discharges carries out the place of gas-liquid separation, and it installs the installation absolute altitude that absolute altitude is lower than oxygen analyzer.The gas vent of gas-liquid separation tank top connects gas piping; The liquid outlet of knockout drum lower end connects waste collection system through pipeline.
Form 7 is arranged between first valve 5 and second valve 6.Variation through liquid level in it can be learnt the pressure surge situation in discharging of waste liquid pipeline and the waste collection system easily.
Tensimeter 9 is arranged on the side line pipeline between first valve 5 and the form 7, is used to observe the back pressure on gaseous emission pipeline and the discharging of waste liquid pipeline.
The 3rd valve 8 is arranged on the side line pipeline, and this valve generally is a normally open, uses when mainly being convenient the maintenance.
The principle of work of this oxygen analyzer is following:
Sample gas of collecting from production flow line and desalted water spray washing in thrower after; Get into water washing tank 1 through feed tube 11; By desalted water and the sedimentation under action of gravity of the dirty waste liquid that constitutes, the appearance gas of decontamination rises and after a series of the processing, gets into the analytic unit of oxygen analyzer in water washing tank 1.
When waste liquid ran up to the overflow vent position of a certain amount of arrival water washing tank, waste liquid overflowed from overflow vent, got into discharging of waste liquid pipeline 2, knockout drum 4 through " U " shape pipe successively, in knockout drum 4, carried out gas-liquid separation.
Sending into catalytic burning device 10 behind waste gas that waste gas that discharge the gas-liquid separation tank top and gas outlet 3 are brought and the stream handles.Because therefore catalytic burning device and atmosphere, can destroy the discharge opeing siphon through gas outlet 3, discharge vent plug, make the waste liquid of downward discharging unobstructed quick.
Knockout drum 4 isolated liquid parts are discharged from the liquid outlet of knockout drum lower end, and first valve of flowing through successively, form and second valve get into waste collection system.Can observe the pressure condition in the pipeline easily through the window-operating worker.When liquid level is high in the form, second valve is opened greatly to reduce liquid level; When liquid level is hanged down, can suitably turn down the open degree of second valve,, wash pressure and the flow that the back exports appearance gas thereby stablize to keep liquid level constant in the form.
Close first valve, open second valve, can understand the situation of PS system pressure fluctuation; Whether close second valve, open first valve, can learn the pressure of exhaust system, observing has back pressure to produce.
Claims (6)
1. magnetic mechanical formula oxygen analyzer sample pretreatment system; Comprise water washing tank and discharging of waste liquid pipeline; Said water washing tank has the discharging tube of the discharging of waste liquid after the feed tube that is connected with the washings pipeline with the appearance air pipe washs with confession; Discharging tube connects the discharging of waste liquid pipeline through the U-shaped pipe, and this discharging of waste liquid pipeline connects airtight waste collection system; It is characterized in that described discharging tube has two outlets, one is leakage fluid dram, and one is exhausr port; Wherein, Described leakage fluid dram connects described discharging of waste liquid pipeline; Be provided with knockout drum between described discharging of waste liquid pipeline and the described waste collection system; The installation absolute altitude of this knockout drum is lower than the installation absolute altitude of oxygen analyzer, and the gas vent of said knockout drum is communicated with atmosphere through gas piping, and the liquid outlet of knockout drum connects waste collection system; Described exhausr port connects described gas piping through gas outlet.
2. magnetic mechanical formula oxygen analyzer sample pretreatment system according to claim 1; It is characterized in that also being provided with the form that is used to show the waste water liquid level between liquid outlet and the described waste collection system of said knockout drum; Pipeline between said form and the said knockout drum is provided with first valve, and the pipeline between said form and the said waste collection system is provided with second valve.
3. magnetic mechanical formula oxygen analyzer sample pretreatment system according to claim 2 is characterized in that also being provided with between said first valve and the said form tensimeter that is used for observing gas piping and discharging of waste liquid pipeline pressure.
4. magnetic mechanical formula oxygen analyzer sample pretreatment system according to claim 3 is characterized in that also being provided with between described tensimeter and the form convenient the 3rd valve that overhauls.
5. according to the described magnetic mechanical formula of the arbitrary claim of claim 1 to 4 oxygen analyzer sample pretreatment system, it is characterized in that the caliber of the caliber of said discharging tube greater than said feed tube.
6. magnetic mechanical formula oxygen analyzer sample pretreatment system according to claim 5 is characterized in that the outlet of said gas piping connects the catalytic burning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220190.4A CN102393324B (en) | 2011-08-01 | 2011-08-01 | Sample pretreatment system of magnetic mechanical oxygen analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220190.4A CN102393324B (en) | 2011-08-01 | 2011-08-01 | Sample pretreatment system of magnetic mechanical oxygen analyzer |
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| CN102393324A true CN102393324A (en) | 2012-03-28 |
| CN102393324B CN102393324B (en) | 2014-05-21 |
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| CN201110220190.4A Active CN102393324B (en) | 2011-08-01 | 2011-08-01 | Sample pretreatment system of magnetic mechanical oxygen analyzer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769242A (en) * | 2016-12-18 | 2017-05-31 | 南通江山农药化工股份有限公司 | The sampler of preparing glyphosate from N-phosphonomethyl aminodiacetic acid reaction end tail gas |
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
| CN112730756A (en) * | 2021-01-06 | 2021-04-30 | 聊城鲁西双氧水新材料科技有限公司 | Online detection system and method for oxygen content of tail gas of oxidation tower |
| CN114797383A (en) * | 2022-05-18 | 2022-07-29 | 广东电网有限责任公司 | Waste liquid transfer device with waste gas negative pressure filtering function |
Citations (3)
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| US20040014234A1 (en) * | 2002-05-29 | 2004-01-22 | Hiroshi Uchihara | Contained oxygen analyzing apparatus and contained analyzing method |
| CN201083651Y (en) * | 2007-09-20 | 2008-07-09 | 宝山钢铁股份有限公司 | Coke oven gas oxygen content analytical equipment |
| CN201803886U (en) * | 2010-08-16 | 2011-04-20 | 聚光科技(杭州)股份有限公司 | Gas pretreatment device and gaseous component monitoring system employing same |
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2011
- 2011-08-01 CN CN201110220190.4A patent/CN102393324B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040014234A1 (en) * | 2002-05-29 | 2004-01-22 | Hiroshi Uchihara | Contained oxygen analyzing apparatus and contained analyzing method |
| CN201083651Y (en) * | 2007-09-20 | 2008-07-09 | 宝山钢铁股份有限公司 | Coke oven gas oxygen content analytical equipment |
| CN201803886U (en) * | 2010-08-16 | 2011-04-20 | 聚光科技(杭州)股份有限公司 | Gas pretreatment device and gaseous component monitoring system employing same |
Non-Patent Citations (1)
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| 马明华: "磁压力式氧分析仪预处理系统的改造", 《化工自动化及仪表》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769242A (en) * | 2016-12-18 | 2017-05-31 | 南通江山农药化工股份有限公司 | The sampler of preparing glyphosate from N-phosphonomethyl aminodiacetic acid reaction end tail gas |
| CN106769242B (en) * | 2016-12-18 | 2019-10-29 | 南通江山农药化工股份有限公司 | The sampler of preparing glyphosate from N-phosphonomethyl aminodiacetic acid reaction end tail gas |
| CN108254240A (en) * | 2017-12-29 | 2018-07-06 | 重庆弛源化工有限公司 | For the mechanical magnetic oxygen table pretreatment system of cracking gas oxygen content on-line checking |
| CN112730756A (en) * | 2021-01-06 | 2021-04-30 | 聊城鲁西双氧水新材料科技有限公司 | Online detection system and method for oxygen content of tail gas of oxidation tower |
| CN114797383A (en) * | 2022-05-18 | 2022-07-29 | 广东电网有限责任公司 | Waste liquid transfer device with waste gas negative pressure filtering function |
| CN114797383B (en) * | 2022-05-18 | 2023-01-24 | 广东电网有限责任公司 | Waste liquid transfer device with waste gas negative pressure filtering function |
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| CN102393324B (en) | 2014-05-21 |
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Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: Sinopec Corp. Applicant after: SINOPEC Ningbo Engineering Company Limited Applicant after: SINOPEC Ningbo Technology Research Institute Co., Ltd. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant before: Sinopec Corp. Applicant before: Sinopec Ningbo Engineering Co., Ltd. Applicant before: Sinopec Ningbo Institute of Technology |
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