CN102445367A - Pretreatment system used for gas on-line analysis - Google Patents
Pretreatment system used for gas on-line analysis Download PDFInfo
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- CN102445367A CN102445367A CN2010105137483A CN201010513748A CN102445367A CN 102445367 A CN102445367 A CN 102445367A CN 2010105137483 A CN2010105137483 A CN 2010105137483A CN 201010513748 A CN201010513748 A CN 201010513748A CN 102445367 A CN102445367 A CN 102445367A
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Abstract
The invention discloses a pretreatment system used for gas on-line analysis, and the system comprises a cooling device, a pressure stabilizing device (14) and a filtering device, wherein the pressure stabilizing device comprises a pressure relief valve (141) and a booster pump (142), the pressure relief valve (141) is connected with the cooling device and used for performing pressure reduction treatment on low-temperature gas, the booster pump (142) is provided with a pressure sensor (143), and the pressure sensor (143) is arranged on a pipeline between the booster pump (142) and the pressure relief valve (141) and used for measuring the pressure of the gas. When the pressure sensor (143) detects that the pressure of the gas is not less than a first preset value, the booster pump (142) does not work; and when the pressure sensor (143) detects that the pressure of the gas is lower than the first preset value, the booster pump works to perform pressurization treatment on the gas which flows through the booster pump. The pretreatment system can ensure that the gas entering an analyzer has a relatively-stable pressure.
Description
Technical field
The present invention relates to a kind of pretreatment system that is used for gas on-line analysis.
Background technology
In chemical field; Especially in petrochemical industry, often need carry out on-line analysis to process gas, these gases often contain compositions such as oil gas, steam solid particulate matter; The precooling meeting when getting into analyser of oil gas, steam becomes liquid; And then the contamination analysis instrument makes it cisco unity malfunction, and solid particulate matter also can the contamination analysis instrument and stopped up gas piping, therefore before gas gets into analytical instrument, must pass through pre-service these compositions are removed; In addition, the gas during on-line analysis all is directly to take from commercial plant with pressure, and the pressure of gas itself has bigger fluctuation, the accuracy that this pressure surge also can the impact analysis result.
For instance; Catalytic gasoline desulfurizer (S-Zorb) commonly used at present is integrated with technologies such as CONTINUOUS REFORMER, catalytic cracking, hydrofining; Wherein, catalyzer carries out the reaction regeneration process in locking hopper, need purge displacement according to the predetermined control mode to reactor with the nitrogen and the hydrogen of heat; Whether and finish through the content of reacted gas detection methane and oxygen being monitored replaced in the reactor, thereby the safety of guaranteeing course of reaction is carried out.Therefore, utilization comprises that the on-line analysis device of pretreatment system comes the atmosphere in the reactor is detected usually.
Traditional pretreatment system generally includes cooling device and filtrator, and the gas that comes from reactor can be separated out partially liq in the gas or oil product, and make the temperature of gas be in suitable scope through after the cooling of cooling device; Filtrator then is used for IMPURITIES IN is filtered out.Like this, after the processing of pretreatment system that comprises cooling device and filtrator, gas can satisfy the requirement of analyser basically, thereby gas is carried out check and analysis.
Yet traditional existing problem of the pretreatment system that is used for gas on-line analysis is: traditional pretreatment system is only paid close attention to the cooling of gas and filtration treatment, and the pressure of still having ignored gas itself has the problem of bigger fluctuation.Therefore; The pretreatment system that is used for gas on-line analysis can not provide pressure metastable gas to analyser; The degree of accuracy of testing result that not only can the impact analysis appearance, pipeline that also can the gas body causes adverse effect, causes pipeline the problem of leaking to occur easily.
Therefore, how the pretreatment system that is used for gas on-line analysis can provide the gas of pressure stability to become the technical matters that this area needs to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide a kind of pretreatment system that is used for gas on-line analysis that the gas of pressure stability can be provided.
According to an aspect of the present invention, the pretreatment system that is used for gas on-line analysis is provided, this pretreatment system comprises:
Heat sink, this heat sink are used for the gas that the is received processing of lowering the temperature;
Stable-pressure device, this stable-pressure device are used for that the cryogenic gas after handling through cooling is carried out voltage stabilizing to be handled; And
Filtration unit, this filtration unit are arranged in the pipeline of said pretreatment system,
Wherein, said stable-pressure device comprises:
Reduction valve, this reduction valve is connected with said heat sink, is used for said cryogenic gas is carried out reduced pressure treatment; With
Supercharge pump, this supercharge pump is provided with pressure transducer, and this pressure transducer is arranged on the pipeline between said supercharge pump and the said reduction valve; The pressure that is used for detected gas; When the force value of the detected gas of this pressure transducer was not less than first predetermined value, said supercharge pump was failure to actuate, and when the force value of the detected gas of said pressure transducer is lower than first predetermined value; Said supercharge pump operation is carried out pressurized treatment with the gas to this supercharge pump of flowing through.
Preferably, said stable-pressure device also comprises safety valve, and this safety valve is connected on the pipeline between said pressure transducer and the said reduction valve.
Preferably; Said stable-pressure device also comprises normally close valve; This normally close valve and said supercharge pump are connected in parallel, and only said normally close valve is connected when the pressure of the gas in the pipeline between said supercharge pump and the reduction valve is lower than the 3rd predetermined value, and the 3rd predetermined value is less than said first predetermined value.
Preferably, said pretreatment system also comprises the water seal buffer tank, and this water seal buffer tank is communicated with said stable-pressure device, is used for that the gas after handling through voltage stabilizing is carried out the secondary voltage stabilizing and handles, and said water seal buffer tank comprises:
The draft tube of threeway, escape pipe and stabilivolt flow into said draft tube through the gas after the voltage stabilizing processing, and the gas after handling through the secondary voltage stabilizing flows out from said escape pipe; With
Tank body; This tank body is connected with water inlet pipe, drainpipe and gas outlet; Wherein, said water inlet pipe is connected in the bottom of said tank body, and said drainpipe passes the bottom of said tank body and stretches in the cavity of said tank body; Said gas outlet is connected in the top of said tank body, and said stabilivolt passes the top of said tank body and stretches in the cavity of said tank body and the opening of said stabilivolt is lower than the opening of said drainpipe.
Preferably, the opening of said stabilivolt is near to or in contact with the inside surface at the jar end of said tank body.
Preferably; Said filtration unit comprises membrane filter; This membrane filter comprises input pipe, first vent pipe and second vent pipe; Said input pipe is connected with the escape pipe of said water seal buffer tank, and said first vent pipe is used to export the gas through after this membrane filter filtration, and said second vent pipe is communicated in atmosphere.
Preferably, said membrane filter is two, and each said membrane filter is connected in the escape pipe of said water seal buffer tank.
Preferably, said stable-pressure device is two covers, and this two covers stable-pressure device is connected in parallel and is not in running order simultaneously.
Preferably, said water seal buffer tank is one, and the draft tube of this water seal buffer tank selectively is communicated with said two covers one in stable-pressure devices cover stable-pressure device.
Preferably, said water seal buffer tank is two, and these two water seal buffer tanks overlap a cover stable-pressure device connection corresponding in the stable-pressure devices with said two respectively.
Preferably, said heat sink comprises the coiled hydrocooler, and this coiled hydrocooler comprises:
Heat exchange body, this heat exchange body comprise cavity and are arranged on the coil pipe in this cavity;
Gas inlet pipe and gas output tube; This gas inlet pipe is connected with the upper end of said coil pipe; The gas delivery that is used for coming from gas pipeline is to said coil pipe, and said gas output tube is connected with the lower end of said coil pipe, is used to export the gas that has flow through said coil pipe;
Water inlet pipe and water delivery pipe; This water inlet pipe is connected in the bottom of said heat exchange body; Be used in the cavity of this heat exchange body, carrying chilled water; Said water delivery pipe is connected in the top of said heat exchange body, be used to export in said heat exchange body accomplish with said coil pipe in the chilled water of gas heat interchange.
Preferably, said heat sink also comprises the vortex cooling device, and this vortex cooling device receives the gas of the gas output tube that comes from said coiled hydrocooler.
Preferably, said coiled hydrocooler and/or said vortex cooling device are connected with blowoff valve, and this blowoff valve is used for the fluent meterial that gas is separated out through the cooling processing process is discharged.
Preferably; Said filtration unit comprises at least one filtrator and the blowoff valve that is connected with this filtrator; This at least one filtrator in said reduction valve downstream and the position that is close to this reduction valve be connected in the pipeline; Be used to filter the IMPURITIES IN through this filtrator, said blowoff valve is used to discharge said filtrator and filters the said impurity that obtains.
According to the pretreatment system that is used for gas on-line analysis provided by the present invention; Owing in this pretreatment system, be provided with stable-pressure device; Thereby can guarantee that the gas that gets into analyser through this pretreatment system has metastable pressure, thereby realize the object of the invention.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of pretreatment system that is used for gas on-line analysis of preferred implementation according to the present invention;
Fig. 2 is a kind of structural representation of preferred implementation that is used for the water seal buffer tank of pretreatment system shown in Figure 1.
Description of reference numerals
Water seal buffer tank 12
Drainpipe 126
View window 128
Coiled hydrocooler 10
Gas inlet pipe 103
Vortex cooling device 11
Stable-pressure device 14
Normally close valve 145
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
As shown in Figure 1, the pretreatment system that is used for gas on-line analysis according to the present invention comprises:
Heat sink, this heat sink are used for the gas that the is received processing of lowering the temperature;
Stable-pressure device 14, this stable-pressure device 14 are used for that the cryogenic gas after handling through cooling is carried out voltage stabilizing to be handled; And
Filtration unit, this filtration unit are arranged in the pipeline of said pretreatment system,
Wherein, said stable-pressure device 14 comprises:
Supercharge pump 142; This supercharge pump 142 is provided with pressure transducer 143; This pressure transducer 143 is arranged on the pipeline between said supercharge pump 142 and the said reduction valve 141, is used for the pressure of detected gas, when the force value of these pressure transducer 143 detected gases is not less than first predetermined value; Said supercharge pump 142 is failure to actuate; And when the force value of said pressure transducer 143 detected gases was lower than first predetermined value, said supercharge pump 142 operations were carried out pressurized treatment with the gas to this supercharge pump 142 of flowing through.
Can carry out check and analysis accurately to gas in order to ensure analyser 13, get into analyser 13 through pretreatment system at gas usually it is carried out pre-service.Usually, this pre-service comprises cooling, dedusting, de-oiling etc.Yet, in traditional pretreatment system, do not recognize that the pressure stability of sample gas can be to the material impact of the check and analysis accuracy of analyser 13.
Inventor of the present invention just recognizes the importance of the pressure stability of gas, can guarantee effectively that just the pressure of gas remains on the interior stable-pressure device design of preset range at the pretreatment system that is used for gas on-line analysis of the present invention.
As shown in Figure 1, in pretreatment system provided by the present invention, heat sink is used for the processing of lowering the temperature of said gas, and the cryogenic gas that will lower the temperature after handling offers said stable-pressure device.Filtration unit is arranged in the pipeline of pretreatment system, and suitable different filtration unit can be set as required in place.To describe in detail hereinafter about heat sink and filtration unit.
As shown in Figure 1, stable-pressure device 14 is connected between heat sink (as will be at the vortex cooling device of describing subsequently 11) and the analyser 13, is used for that the gas that comes from heat sink is carried out voltage stabilizing and handles, and will pass through gas delivery that voltage stabilizing handles to analyser 13.Through stable-pressure device 14 is set, can makes gas before getting into analyser 13, obtain voltage stabilizing and handle, thereby be in relatively stably in the pressure limit.Therefore, make said analyser 13 receive pressure and remain on the gas within this preset range, avoid the bigger sample gas of pressure surge that the detection accuracy of analyser 13 is caused adverse effect.
Specifically, as shown in Figure 1, said stable-pressure device 14 comprises: reduction valve 141, and this reduction valve 141 is connected with said heat sink, is used for said cryogenic gas is carried out reduced pressure treatment; With supercharge pump 142; This supercharge pump 142 is provided with pressure transducer 143, and this pressure transducer 143 is arranged on the pipeline between said supercharge pump 142 and the said reduction valve 141, is used for the pressure of detected gas; When the force value of these pressure transducer 143 detected gases is not less than first predetermined value; Said supercharge pump 142 is failure to actuate, and when the force value of said pressure transducer 143 detected gases is lower than first predetermined value, said supercharge pump 142 operations; Gas with to this supercharge pump 142 of flowing through carries out pressurized treatment, thereby makes the pressure of the gas of from stable-pressure device, exporting be in suitable scope.
The effect of reduction valve 141 is to make the pressure of the gas that passes through this reduction valve 141 to be reduced to suitable level.For example, the gas that is higher than 0.05MPa when pressure is through behind this reduction valve 141, and the pressure of gas drops to below the 0.05MPa.Drop to suitable level through the pressure that makes gas, help alleviating the stress level of pipeline, thereby prevent the occurrence probability of defectives such as revealing, and help the maintenance of system.Reduction valve 141 can adopt common gases reduction valve etc.
Supercharge pump 142 is connected the downstream of reduction valve 141.And supercharge pump 142 has the pressure transducer 143 on the pipeline between supercharge pump 142 and the reduction valve 141, is used to detect the stress level of the gas that gets into supercharge pump 142.
If the force value of pressure transducer 143 detected gases is not less than first predetermined value, then supercharge pump 142 does not move.In this case, supercharge pump 143 allows the gas stream mistake as path.
And if the force value of pressure transducer 143 detected gases is lower than first predetermined value; Then supercharge pump 142 operations; Thereby the gas to this supercharge pump 142 of flowing through carries out pump pressure; With the stress level of raising, thereby make the pressure of the gas of from stable-pressure device, exporting be in suitable scope through the gas of this supercharge pump 142.
Said pressure transducer 143 can be selected just to send device, pressure switch etc. in pressure.The scope of said first predetermined value can be selected according to concrete application scenario, for example can be 0.02-0.04Mpa, is preferably 0.03Mpa.
In conjunction with Fig. 1; Can know through foregoing description; Utilization comprises the stable-pressure device 14 of above-mentioned reduction valve 141 and supercharge pump 143, can carry out voltage stabilizing to the cryogenic gas that flows out from heat sink and handle, and remains within the suitable temperature range thereby make from stable-pressure device 14 effluent airs.
Under preferable case, as shown in Figure 1, said stable-pressure device 14 also comprises safety valve 144, and this safety valve 144 is connected on the pipeline between pressure transducer 143 and the said reduction valve 141,
When the pressure through the gas after the reduced pressure treatment of said reduction valve 141 is not higher than second predetermined value; This safety valve 144 ends; And when the pressure through the gas after the reduced pressure treatment of said reduction valve 141 surpassed second predetermined value, this safety valve 144 was connected, thereby made above-mentioned pipeline and atmosphere; So that an amount of gas is discharged in the atmosphere, thereby reduce the pressure of gas in the pipeline.After the pressure of gas in the pipeline reached second predetermined value, safety valve 144 became cut-off state from on-state.The main effect of safety valve 144 is to prevent that the pressure of gas is excessive in the pipeline, guarantees the safety of system pipeline.
The scope of said second predetermined value can be selected according to concrete application scenario, for example can be 0.045-0.06Mpa, is preferably 0.05Mpa.
Preferably; In order to improve the safe reliability of supercharge pump 142, said stable-pressure device 14 also comprises normally close valve 145, and this normally close valve 145 is connected in parallel with said supercharge pump 142; Said (promptly end) of normally close valve 145 for closing; And and if only if the pressure of the gas in the pipeline between said supercharge pump 142 and the reduction valve 141 when being lower than the 3rd predetermined value, said normally close valve 145 is connected, and the 3rd predetermined value is less than said first predetermined value.
It is in order to prevent that under the situation of the upper reaches of supercharge pump 142 cause clogging supercharge pump 142 operations cause upstream is carried out aspiration vacuum that normally close valve 145 is set.When the pressure of the gas in the pipeline between supercharge pump 142 and reduction valve 141 was lower than first predetermined value, supercharge pump 142 operation work were to carry out pump pressure to gas.If the upstream of supercharge pump 142 is stopped up (like the pipeline cause clogging between supercharge pump 142 and the reduction valve 141), then the pressure of the gas of the pipeline between supercharge pump 142 and the reduction valve 141 can sharply reduce.When the pressure of gas drops to the 3rd predetermined value (the 3rd predetermined value is less than above-mentioned first predetermined value), at this moment, normally close valve 145 is connected, thereby the two ends of supercharge pump 142 are communicated with.At this moment, the operation of supercharge pump 142 can not produce the effect of aspiration vacuum, thereby the pipeline in supercharge pump 142 and the system is all played a protective role.
Normally close valve 145 can be also can be retaining valve by the valve element of manually-operated, pneumatic control, hydrostatic control or Electromagnetic Control, as long as can realize the function of normally close valve 145.As stated, said the 3rd predetermined value is less than first predetermined value.Therefore the scope in said first predetermined value is under the situation of 0.02-0.04Mpa, and the scope of the 3rd predetermined value can be 0.15-0.3Mpa.
Under the preferable case; As shown in Figure 1, in order further to obtain better voltage regulation result, said pretreatment system also comprises water seal buffer tank 12; This water seal buffer tank 12 is connected with said stable-pressure device 14, is used for that the gas after handling through voltage stabilizing is carried out the secondary voltage stabilizing and handles.
Said water seal buffer tank 12 comprises: the draft tube 121 of threeway, escape pipe 122 and stabilivolt 123, flow into said draft tube 121 through the gas after the voltage stabilizing processing, and the gas after handling through the secondary voltage stabilizing flows out from said escape pipe 122; With tank body 124; This tank body 124 is connected with water inlet pipe 125, drainpipe 126 and gas outlet 127; Wherein, Said water inlet pipe 125 is positioned at the bottom that is connected in said tank body 124; Said drainpipe 126 passes the bottom of said tank body 124 and stretches in the cavity of said tank body 124, and said gas outlet 127 connects the top that is positioned at said tank body 124, and said stabilivolt 123 passes the top of said tank body 124 and stretches in the cavity of said tank body 124 and the opening of said stabilivolt 123 is lower than the opening of said drainpipe 126.
As shown in Figure 2, the tank body 124 of water seal buffer tank 12 is connected with water inlet pipe 125, drainpipe 126 and gas outlet 127.Water inlet pipe 125 is connected in the bottom of said tank body 124, thereby water is fed in the inside of tank body 124.Drainpipe 126 passes the bottom of tank body 124 and stretches in the cavity of tank body 124, thereby when the liquid level of the water in the tank body 124 is higher than the port height of drainpipe 126, can water be discharged.Through this structure setting, can the water of q.s be kept in the tank body 124, to realize the effect of water seal voltage stabilizing.Stabilivolt 123 passes the top of tank body 124 and stretches in the cavity of tank body 124 and the opening of stabilivolt 123 is lower than the opening of drainpipe 126.Because the opening of stabilivolt 123 is lower than the opening of drainpipe 126, therefore when stabilivolt 123 stretches in the cavity of tank body 124 of the water that has scheduled volume, stabilivolt 123 is stretched in the water, with realization water seal voltage stabilizing.Gas outlet 127 is connected in the top of tank body 124, is used for the gas that gets into the cavity of tank body 124 from stabilivolt 123 is discharged.
More than the structure of water seal buffer tank 12 is described in detail.Do relevant explanation in the face of the operational process and the principle of this water seal buffer tank 12 down.
When gas gets into draft tube 121; Can receive the damping action of subsequent parts; In this case, (less) a part of gas gets in the interior water of the cavity of tank body 124 through stabilivolt 123, and (more) another part gas flow escape pipe 122 and receive follow-up damping action.Therefore; Can emerge and enter into the cavity of tank body 124 from the port of stabilivolt 123 through making the gas that flows into stabilivolt 123; The pressure of the water column in the port that the pressure that can guarantee the gas in draft tube 121, escape pipe 122 and the stabilivolt 123 equals stabilivolt 123 basically and the tank body 124 between the liquid level of water, thereby the effect of realization voltage stabilizing.
Preferably, in order to obtain relatively large water column pressure, the opening of stabilivolt 123 is near to or in contact with the inside surface at the jar end of tank body 124, and is as shown in Figure 2, therefore in this case, can make the pressure of gas remain the pressure of water colunm heights in the tank body 124.
In addition; Preferably, as shown in Figure 2, also be provided with transparent view window 128 on the top of the tank body 124 of water seal buffer tank 12; So that whether the working condition of operating personnel's field observation water seal buffer tank 12 inside for example can observe gas and normally from stabilivolt 123, emerge.
Because gas carries out the secondary voltage stabilizing through water seal buffer tank 12 again and handles, thereby can provide pressure more stable gas for analyser 13 after handling through the voltage stabilizing of stable-pressure device, to obtain testing result more accurately.
Preferably, get into analyser 13 in order to prevent the entrained impurity of gas, thus the normal check and analysis of impact analysis appearance 13; As shown in Figure 1; Said on-line analysis system also comprises membrane filter 15, and this membrane filter 15 comprises input pipe 16, first vent pipe 17 and second vent pipe 18, and said input pipe 16 is connected with the escape pipe 122 of said water seal buffer tank 12; Said first vent pipe 17 is connected with said analyser 13, and said second vent pipe 18 is communicated in atmosphere.
As shown in Figure 1; After gas arrives the filtering membrane of membrane filter through input pipe 16; The gas componant of filtering membrane that can be through membrane filter then gets into first vent pipe 17 smoothly, can not then discharge through second vent pipe 18 through the impurity particle and the liquid component (like water) of membrane filter.Therefore, the membrane filter with structure shown in Figure 1 has self-cleaning function, can prevent that impurity from accumulating in the membrane filter, prevents the decline of membrane filter strainability.
Certainly, the present invention is not limited to membrane filter, can also select the de-watering apparatus of other types, like canister of desiccant etc.
Through the setting of membrane filter 15, comparatively clean gas is provided for analyser 13, thereby guarantees that analyser 13 carries out check and analysis accurately.
Under the preferable case, as shown in Figure 1, said membrane filter 15 can be two, and each said membrane filter 15 is connected in the escape pipe 122 of said water seal buffer tank 12, thereby is respectively two analysers, 13 sampling gases.
That is to say in this preferred on-line analysis system, have two analysers 13 to be connected in the escape pipe 121 of water seal buffer tank 12 simultaneously through membrane filter 15 separately, thereby can carry out check and analysis simultaneously.In addition, can also make the gas of the escape pipe 121 that comes from water seal buffer tank 12 get into wherein any analyser 13, and to operations such as another analyser 13 overhaul.
In the preferable case, as shown in Figure 1, said stable-pressure device is two covers, and this two covers stable-pressure device is connected in parallel and is not in running order simultaneously.For example, this two covers stable-pressure device is connected in parallel between said vortex cooling device 11 and the said water seal buffer tank 12, and said two stable-pressure devices are not in running order simultaneously.
That is to say, when pretreatment system provided by the present invention carries out pre-treatment job, can utilize the cover of two covers in the stable-pressure devices 14, another set ofly operation such as then can safeguard.Certainly, stable-pressure device 14 also is not limited to two covers, can also be for more covers, like three cover or quadruplets.
At stable-pressure device 14 is that water seal buffer tank 12 can be for one or more under the situation of many covers (like a cover, as shown in Figure 1).
For example, as shown in Figure 1, said water seal buffer tank 12 can be one, and the draft tube 121 of this water seal buffer tank 12 selectively is connected with said two covers one in stable-pressure devices 14 cover stable-pressure device 14.That is to say two cover stable-pressure devices, 14 public water seal buffer tanks 12.In the time of in the cover stable-pressure device in the two cover stable-pressure devices is in running order; The draft tube 121 of water seal buffer tank 12 can be selected to be communicated with the cover of one during this is in running order stable-pressure device, and is not communicated with the another set of stable-pressure device that is in off working state (as overhauling).
For another example, water seal buffer tank 12 can be two (this kind situation is diagrams not), and these two water seal buffer tanks overlap a cover stable-pressure device connection corresponding in the stable-pressure devices with said two respectively.That is to say that every cover stable-pressure device 14 has water seal buffer tank separately.
Design as for water seal buffer tank 12 and stable-pressure device 14 can be selected according to concrete application scenario, just describes no longer in more detail here.
Preferably, as shown in Figure 1, said heat sink comprises coiled hydrocooler 10, and this coiled hydrocooler 10 comprises:
When coming from this coiled hydrocooler 10 of gas arrival of gas pipeline, at first get into gas inlet pipe 103, and then flow into the upper end of said coil pipe 102, thereby flow along coil pipe 102.Then, arrive the lower end of coil pipe 102, and final inflow gas efferent duct 104, be discharged to subsequent parts subsequently.Simultaneously, in the cavity of heat exchange body 101, chilled water gets in the said cavity through water inlet pipe 105, and upwards flow to water delivery pipe 106, and then is discharged to the outside.
When gas during in coil pipe 102 internal flows, chilled water is simultaneously in coil pipe 102 outside flowing.And as shown in Figure 1, gas is mobile from the top down in the direction that flows of coil pipe 102 usually, and chilled water is mobile from bottom to top in the cavity of heat exchange body 101, and promptly gas flow direction and cooling-water flow direction are reverse.According to this structure, can make the relatively low chilled water of higher relatively gas of temperature and temperature fully realize heat interchange, thereby realize making the effect of gas temperature decline.
Preferably, coil pipe 102 is a spirality, to enlarge above-mentioned heat exchange area.Coil pipe 102 is not limited to the shape shown in Fig. 1, can also be multiple shape, the tubulose that extends like bending etc.
In addition, heat sink is not limited to above-mentioned coiled hydrocooler, for example can also select jacket type water-cooled jar.
Further preferably; In order to obtain better cooling-down effect, as shown in Figure 1, said heat sink also comprises vortex cooling device 11; This vortex cooling device 11 receives the gas of the gas output tube 104 that comes from said coiled hydrocooler 10, is used for this gas is carried out cooling processing.
This preferred embodiment in, gas gets in the vortex cooling device 11 through gas output tube 104 after handling through the cooling of coiled hydrocooler 10 again, again by the processing that cools of this vortex cooling device 11.
Since adopted can be integrally to gas lower the temperature, the vortex cooling device of dedusting and de-oiling; Therefore can improve the degree of purity of entering with the gas of back part; Make this gas have suitable temperature, can also guarantee that this gas has desirable cleanliness factor simultaneously.These useful effects all help analyser 13 to obtain check and analysis result comparatively accurately.
Gas along with the reduction of temperature, tends to separate out various materials through after the processing of above-mentioned heat sink in the gas, these materials generally include water and oil product.And vortex cooling device 11 itself just has the effect of de-oiling.
Therefore; For the material of in time gas being separated out in temperature decline process is discharged in the outside of the pipeline of on-line analysis system; Preferably; Coiled hydrocooler 10 and/or vortex cooling device 11 are connected with blowoff valve 111, and this blowoff valve 111 is used for the fluent meterial that gas is separated out through the cooling processing process is discharged.
Through using above-mentioned heat sink, can make gas before entering into water seal buffer tank 12, have suitable temperature, can also have cleanliness factor preferably simultaneously.
Though in preferred implementation of the present invention, heat sink has adopted above-mentioned coiled hydrocooler 10 and vortex cooling device 11, the present invention is not limited to this.For example, industrial refrigerator can in heat sink shown in Figure 1, be increased in addition, to obtain better cooling-down effect.In addition, can also be fully need not above-mentioned coiled hydrocooler 10 and vortex cooling device 11, and only use other heat sinks such as industrial refrigerator.
In addition; Can know from the structural drawing of the on-line analysis system of preferred implementation shown in Figure 1; In the pipeline of this system, multiple servicing unit can be set; Like various valves, pipeline etc., this can be provided with reference to traditional on-line analysis system, and perhaps the pipeline with reference to chemical plant commonly used is provided with.
But under preferable case, at least one filtrator 19 can be set in the pipeline of on-line analysis system, this filtrator 19 is connected with blowoff valve 20, and is as shown in Figure 1.Filtrator 19 can be used to filter various impurity, for example various dust granules, and various liquid are like water or oil product etc.Therefore, can be according to various parameters such as the type of the incompatible selection filtrator 19 of concrete applied field, model, size, strainabilities, and, can be provided with suitable filtrator 19 in place.Through filtrator 19 is set, can remove the IMPURITIES IN material more up hill and dale, thus the gas that acquisition has desirable cleanliness.
According to a kind of preferable case; As shown in Figure 1, said at least one filtrator 19 in said reduction valve 141 downstream and the position that is close to this reduction valve 141 be connected in the pipeline, discharge in time will pass through the fluent meterial of separating out in the gas of reduction valve 141; Can also alleviate simultaneously the work load of downstream membrane filter 15; Be used to filter the IMPURITIES IN through this filtrator 19, said blowoff valve 20 is used to discharge said filtrator 19 and filters the said impurity that obtains, like water or oil product etc.In addition, between gas pipeline and coiled hydrocooler 10, also filtrator can be set.
In this manual, though mainly be to be that example is described with the pretreatment system that is used for gas on-line analysis in the petrochemical industry.But; Those skilled in the art should be understood that; Technical scheme provided by the present invention is not limited in petrochemical industry; But be applicable to the industrial occasions of multiple gases on-line analysis, as long as the pressure surge of gas has adverse effect to the on-line analysis structure, utilize technical scheme provided by the present invention just can address this problem.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner, and be not limited to the adduction relationship of each item claim in claims.The present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (14)
1. the pretreatment system that is used for gas on-line analysis, this pretreatment system comprises:
Heat sink, this heat sink are used for the gas that the is received processing of lowering the temperature;
Stable-pressure device (14), this stable-pressure device (14) are used for that the cryogenic gas after handling through cooling is carried out voltage stabilizing to be handled; And
Filtration unit, this filtration unit are arranged in the pipeline of said pretreatment system,
Wherein, said stable-pressure device (14) comprising:
Reduction valve (141), this reduction valve (141) is connected with said heat sink, is used for said cryogenic gas is carried out reduced pressure treatment; With
Supercharge pump (142); This supercharge pump (142) is provided with pressure transducer (143); This pressure transducer (143) is arranged on the pipeline between said supercharge pump (142) and the said reduction valve (141), is used for the pressure of detected gas, when the force value of the detected gas of this pressure transducer (143) is not less than first predetermined value; Said supercharge pump (142) is failure to actuate; And when the force value of the detected gas of said pressure transducer (143) was lower than first predetermined value, said supercharge pump (142) operation was carried out pressurized treatment with the gas to this supercharge pump (142) of flowing through.
2. pretreatment system according to claim 1, wherein, said stable-pressure device (14) also comprises safety valve (144), this safety valve (144) is connected on the pipeline between said pressure transducer (143) and the said reduction valve (141).
3. pretreatment system according to claim 2; Wherein, Said stable-pressure device (14) also comprises normally close valve (145); This normally close valve (145) is connected in parallel with said supercharge pump (142), and only said normally close valve (145) is connected when the pressure of the gas in the pipeline between said supercharge pump (142) and the reduction valve (141) is lower than the 3rd predetermined value, and the 3rd predetermined value is less than said first predetermined value.
4. according to any described pretreatment system among the claim 1-3; Wherein, Said pretreatment system also comprises water seal buffer tank (12); This water seal buffer tank (12) is connected with said stable-pressure device (14), is used for that the gas after handling through voltage stabilizing is carried out the secondary voltage stabilizing and handles, and said water seal buffer tank (12) comprising:
The draft tube of threeway (121), escape pipe (122) and stabilivolt (123) flow into said draft tube (121) through the gas after the voltage stabilizing processing, and the gas after handling through the secondary voltage stabilizing flows out from said escape pipe (122); With
Tank body (124); This tank body (124) is connected with water inlet pipe (125), drainpipe (126) and gas outlet (127); Wherein, Said water inlet pipe (125) is connected in the bottom of said tank body (124); Said drainpipe (126) passes the bottom of said tank body (124) and stretches in the cavity of said tank body (124), and said gas outlet (127) is connected in the top of said tank body (124), and said stabilivolt (123) passes the top of said tank body (124) and stretches in the cavity of said tank body (124) and the opening of said stabilivolt (123) is lower than the opening of said drainpipe (126).
5. pretreatment system according to claim 4, wherein, the opening of said stabilivolt (123) is near to or in contact with the inside surface at the jar end of said tank body (124).
6. pretreatment system according to claim 5; Wherein, Said filtration unit comprises membrane filter (15), and this membrane filter (15) comprises input pipe (16), first vent pipe (17) and second vent pipe (18), and said input pipe (16) is connected with the escape pipe (122) of said water seal buffer tank (12); Said first vent pipe (17) is used for the gas after output is filtered through this membrane filter (15), and said second vent pipe (18) is communicated in atmosphere.
7. pretreatment system according to claim 5, wherein, said membrane filter (15) is two, each said membrane filter (15) is connected in the escape pipe (122) of said water seal buffer tank (12).
8. pretreatment system according to claim 7, wherein, said stable-pressure device (14) is two covers, this two covers stable-pressure device is connected in parallel and is not in running order simultaneously.
9. pretreatment system according to claim 8, wherein, said water seal buffer tank (12) is one, the draft tube (121) of this water seal buffer tank (12) selectively with said two covers stable-pressure devices (14) in a cover stable-pressure device (14) be communicated with.
10. pretreatment system according to claim 8, wherein, said water seal buffer tank (12) is two, these two water seal buffer tanks overlap a cover stable-pressure device connection corresponding in the stable-pressure devices with said two respectively.
11. pretreatment system according to claim 1, wherein, said heat sink comprises coiled hydrocooler (10), and this coiled hydrocooler (10) comprising:
Heat exchange body (101), this heat exchange body (101) comprise cavity and are arranged on the coil pipe (102) in this cavity;
Gas inlet pipe (103) and gas output tube (104); This gas inlet pipe (103) is connected with the upper end of said coil pipe (102); The gas delivery that is used for coming from gas pipeline is to said coil pipe (102); Said gas output tube (104) is connected with the lower end of said coil pipe (102), is used for the gas that said coil pipe (102) have been flow through in output;
Water inlet pipe (105) and water delivery pipe (106); This water inlet pipe (105) is connected in the bottom of said heat exchange body (101); Be used in the cavity of this heat exchange body (101), carrying chilled water; Said water delivery pipe (106) is connected in the top of said heat exchange body (101), be used for that output is accomplished said heat exchange body (101) in and said coil pipe (102) in the chilled water of gas heat interchange.
12. pretreatment system according to claim 11, wherein, said heat sink also comprises vortex cooling device (11), and this vortex cooling device (11) receives the gas of the gas output tube (104) that comes from said coiled hydrocooler (10).
13. pretreatment system according to claim 12; Wherein, Said coiled hydrocooler (10) and/or said vortex cooling device (11) are connected with blowoff valve (111), and this blowoff valve (111) is used for the fluent meterial that gas is separated out through the cooling processing process is discharged.
14. pretreatment system according to claim 1; Wherein, Said filtration unit comprises at least one filtrator (19) and the blowoff valve (20) that is connected with this filtrator (19); This at least one filtrator (19) in said reduction valve (141) downstream and the position that is close to this reduction valve (141) be connected in the pipeline, be used for filtering IMPURITIES IN through this filtrator (19), said blowoff valve (20) is used to discharge said filtrator (19) and filters the said impurity that obtains.
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| CN2010105137483A CN102445367A (en) | 2010-10-13 | 2010-10-13 | Pretreatment system used for gas on-line analysis |
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| CN104596831A (en) * | 2014-12-31 | 2015-05-06 | 聚光科技(杭州)股份有限公司 | Gas pretreatment device and gas pretreatment method |
| CN104678052A (en) * | 2013-11-27 | 2015-06-03 | 上海宝钢工业技术服务有限公司 | Sensor purging medium treatment system |
| CN104964851A (en) * | 2015-06-09 | 2015-10-07 | 上海汉克威自动化科技有限公司 | Petrochemical engineering catalytic gasoline adsorption desulphurization locked hopper online analysis system |
| CN106248445A (en) * | 2016-08-30 | 2016-12-21 | 中煤科工集团重庆研究院有限公司 | Extraction method high-temperature flue gas discharge on-line analysis system in situ |
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| CN104964851A (en) * | 2015-06-09 | 2015-10-07 | 上海汉克威自动化科技有限公司 | Petrochemical engineering catalytic gasoline adsorption desulphurization locked hopper online analysis system |
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| CN106248445A (en) * | 2016-08-30 | 2016-12-21 | 中煤科工集团重庆研究院有限公司 | Extraction method high-temperature flue gas discharge on-line analysis system in situ |
| 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 |
| CN106907571A (en) * | 2017-02-21 | 2017-06-30 | 重庆川仪分析仪器有限公司 | Airline pressure control system and total carbon-hydrogen analyzer |
| CN106907571B (en) * | 2017-02-21 | 2019-04-02 | 重庆川仪分析仪器有限公司 | Airline pressure control system and total carbon-hydrogen analyzer |
| CN108982744A (en) * | 2018-05-07 | 2018-12-11 | 西北工业大学 | Combustion gas sampling rake and fuel gas analysis system and method suitable for aircraft engine |
| CN109541142A (en) * | 2018-11-28 | 2019-03-29 | 徐州江煤科技有限公司 | A kind of pump suction type CH_4 detection device |
| CN110044676A (en) * | 2019-04-24 | 2019-07-23 | 上海汉克威自动化科技有限公司 | One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method |
| CN110044676B (en) * | 2019-04-24 | 2022-01-14 | 上海汉克威自动化科技有限公司 | Sample gas pretreatment system and method for acrylonitrile device oxygen analyzer |
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Application publication date: 20120509 |