CN110044676A - One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method - Google Patents
One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method Download PDFInfo
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- CN110044676A CN110044676A CN201910334961.9A CN201910334961A CN110044676A CN 110044676 A CN110044676 A CN 110044676A CN 201910334961 A CN201910334961 A CN 201910334961A CN 110044676 A CN110044676 A CN 110044676A
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- sample gas
- gas
- oxygen analyzer
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- flow diverter
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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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
- G01N1/34—Purifying; Cleaning
Abstract
The invention discloses one kind to be used for acrylonitrile installation oxygen analyzer sample gas pretreatment system, it also discloses a kind of for acrylonitrile installation oxygen analyzer sample gas preprocess method, it include 9 steps, the present invention passes through interfering component and polymer in the abundant sample dissolution gas of desalted water, cooling is carried out to sample gas and removes water re-moving component, then forms final sample gas through level-one secondary filtration.The failure rate of oxygen analyzer can be effectively reduced in the processing method, reduce stop frequency in production；Compressed air-driven refrigerator is used during in pre- place, and desalination water purification driving flow diverter used, greenization technique is washed with water, clear and principle is simple, production operation process is easy, is suitble to large-scale industrial production application, the present invention is widely used in acrylonitrile process processing and its relevant industries use.
Description
Technical field
Present invention invention is related to Sample Pretreatment Technique Used field, specifically a kind of to be used for acrylonitrile installation oxygen analyzer sample
Gas pretreatment system and method.
Background technique
The production method of acrylonitrile mainly includes cyanoethanol method, acetylene method and propylene ammmoxidation process, wherein ammoxidation of propylene
Method since acrylonitrile process rate is higher, lower cost and be widely used in industrial production.
The key reaction of propylene ammmoxidation process is CH3-CH=CH2+NH3+1.5O2 → CH2=CH-C ≡ N+3H2O, due to
Industrialized production is a continuous production process, is different from laboratory reaction and small trial production, and industrialized production acrylonitrile is logical
Reaction principle of mobile equilibrium is crossed to make reaction constantly reaction process is mobile to promoting, due to oxygen in acrylonitrile raw material price most
It is low, it can be reacted by directly inputting air, therefore, the acrylonitrile of industrialized production initially can just be brought into miscellaneous in reaction
Matter gas.
According to principle of mobile equilibrium, since the content of oxygen is higher than the amount of oxygen needed according to the proportion, W-response
Rate will receive the influence of oxygen content, that is, oxygen content is high, and W-response rate is accelerated, and oxygen content is low, W-response
Rate decline, therefore, in commercial process needs strictly to monitor oxygen content, therefore, react in industrial processes
Oxygen analyzer can be set at the feed inlet of kettle, and main purpose is the input rate for monitoring oxygen and the content of pure oxygen, due to oxygen
Analyzer belongs to precision instrument, is very easy to damage, therefore, the foreign gas interference that oxygen analyzer can be entered at air inlet,
If things go on like this, the foreign gas blocking that oxygen analyzer can be entered even damages.
And the oxygen analyzer damaged will cause detection error first, secondly, replacement oxygen analyzer needs to produce parking, influence
Enterprises production efficiency, finally, frequently replacement oxygen analyzer will increase the production investment of enterprise.
Summary of the invention
Present invention invention provide it is a kind of for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method with
Solve the problems, such as that sample gas contains more background gas in oxygen analyzer in the prior art.
In order to solve the above-mentioned technical problem, the following technical solution of disclosure of the invention of the present invention:
One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system, including process pipe, sampling probe, instrument
Table wind vacuum filter, desalination water filter, flow diverter, vacuum tank, gas-liquid separator, Windspout freezer, condensation filter, oxygen
Analyzer, connecting line, instrument, valve and flowmeter, process pipe, sampling probe, instrument wind vacuum filter, desalted water mistake
Between filter, flow diverter, vacuum tank, gas-liquid separator, vortex effect refrigeration pipe, Windspout freezer, condensation filter and oxygen analyzer
It is attached by connecting line, setting vortex effect refrigeration pipe Windspout freezer is using vortex effect refrigeration pipe as system in Windspout freezer
Cold main body.
The flow diverter includes flow diverter main body, diversion pipe, injection pipe, flange, bracket A, sealing ring and screw, described to draw
Stream device main body is circular ring structure, in diversion pipe insertion flow diverter body lumen, is arranged injection pipe on diversion pipe, on injection pipe
Flange is set, several sealing rings are set between injection pipe and flange, bracket A is set on the flange, if being arranged on the bracket A
Dry through hole, the through hole are circle, and the screw runs through the through hole and flanged joint of bracket A.
The flow diverter desalination water-driven, the pressure position 0.7.Mpa of the desalted water, flow diverter and desalination water regulating valve it
Between connecting line be drainage tube, when desalination water regulating valve is in open state, desalination water flow velocity is fast in drainage tube, so that flow diverter
Inlet forms back pressure, i.e., there are biggish pressure differences with external atmosphere pressure for the pressure in flow diverter, can suck feeding gas
Flow diverter, the air-water mixture in flow diverter pass through pressure extrusion, can spray flow diverter.
Vacuum tank includes main tank and compensator, and the main tank includes vacuum tank entrance, vacuum tank outlet, lime set mouth and maintenance
Mouthful, the compensator includes gas-liquid equilibrium mouth, discharge leakage fluid dram, and the main tank includes interior room and mistress, the interior room and mistress
Between be separated by partition, the partition upper end is fixedly linked with main tank upper wall, the septum plate length be less than main tank height, that is,
The interior room of main tank is connected to mistress bottom end, and overflow port is arranged on the main tank side wall, and the overflow port is mutual with compensator by main tank
It is connected, gas-liquid equilibrium mouth is arranged in the compensator upper end, and discharge leakage fluid dram, the discharge drain is arranged in the compensator lower end
Mouth is U-shaped structure.
Gas-liquid separator includes entrance, outlet and leakage fluid dram, inlet porting pipe in the entrance, and the inlet tube protrudes into gas
Liquid/gas separator bottom, the outlet protrusion mix gas-liquid by liquid gravity and gas pressure in gas-liquid separator upper surface
Zoarium is separated.Liquid imports vacuum tank mistress through drain pipe.
Vortex effect refrigeration pipe is set in Windspout freezer, vortex effect refrigeration pipe include cold wind exhaust cap, O-ring, vortex chamber component,
Instrument air air inlet and hot-air exhaust valve, instrument air air inlet upper end are connect with vortex chamber component, the instrument
Air inlet lower end is fixedly connected with hot-air exhaust valve, is passed through between the instrument air air inlet and hot-air exhaust valve
O-ring connection, vortex chamber component upper end are arranged cold wind exhaust cap, pass through between the cold wind exhaust cap and vortex chamber component
O-ring transition connection.
Into after vortex effect refrigeration pipe, air-flow is rotating with to be up to 1,000,000 turns of speed per minute and flows to whirlpool blast injection
Flow tube hot gas end right-side outlet, a part of air-flow by control valve flow out, after remaining gas is blocked, Primordial Qi stream inner ring with
Same revolving speed reversely rotates, and flows on the left of vortex tube cold air end.
The pressure difference of power source of the invention between connecting line, the pressure difference inside and outside connecting line and connecting tube
Pressure difference between road and each part of appliance, after sample gas keeps continuous input, it will be able to guarantee preprocessing process continuously into
Row.
One kind being used for acrylonitrile installation oxygen analyzer sample gas preprocess method, comprising the following steps:
Step 1, it samples: taking out analysis sample gas from process pipe by sampling probe；
Step 2, high pressure drains: desalted water flow at high speed in drainage tube forms back pressure at sample inlet, drives sample
Gas enters flow diverter.
Step 3, mix: analysis sample gas be blended in desalted water mixed in flow diverter after form air-water mixture, spraying
It penetrates in pipe and forms misty air-water mixture.
Step 4, pressure stabilizing separates: the misty air-water mixture in step 3 enters vacuum tank through spraying at flow diverter nozzle, right
Misty air-water mixture carries out initial gross separation, forms sample gas A.
Step 5, second dehydration: the sample gas A in step 4 is subjected to gas-liquid separation, forms sample gas B；
Step 6, condensation dehydration: the sample gas B in step 4 is condensed, exclude condensate liquid after formed sample gas just at
Product；
Step 7, multistage filtering: the sample gas first product in step 6 is subjected to multistage filtering, filters out sample gas first product
In fine particle after, formed sample gas finished product；
Step 8, sample introduction is analyzed: the sample gas finished product in step 7 being delivered to oxygen analyzer and is analyzed；
Step 9, post-processing: collect bypass loss sample gas and step 8 in oxygen analyzer analysis after sample gas at
Product carry out completely burned, form innocuous substance.
The subnormal ambient is formed in flow diverter inlet, and desalination water pressure is 0.7Mpa, and desalted water is high in drainage tube
Speed flowing forms back pressure, after the sample gas sucks flow diverter by negative pressure, into sampling conduit at sample inlet.
After the sample gas enters drainage tube, misty air-water mixture is formed with high pressure demineralized water.The mist air water is mixed
It closes object and high-pressure injection is carried out by the drainage pipe of flow diverter, the misty air-water mixture after injection carries out surely after entering vacuum tank
Pressure isolates sample gas and liquid water.
Sample gas after the separation, it is mixed to gas-liquid by liquid gravity and gas pressure through secondary knockout drum
Zoarium carries out secondary separation.Liquid water is flowed to vacuum tank mistress, while achieving the purpose that secondary pressure.
Sample gas after the secondary separation pressure stabilizing, freezes by whirlwind, forms lime set and is discharged into vacuum tank mistress, goes again
Except hydrone appended in sample gas.Sample gas after refrigeration is restored under the action of steam companions close to the temperature before refrigeration
Angle value.More pure sample gas forms final analysis sample gas through level-one secondary filtration, carries out sample into analysis meter
Analysis.
Sample gas and oxygen analyzer the outlet tail gas bypassed is by remittance catalytic burner, through catalytic burner Combustion Energy
It is enough to be more completely converted to innocuous substance, at the same time, it ensure that constant and emptying back pressure value close to atmospheric pressure.
The instrument includes but is not limited to pressure gauge.
The valve includes but is not limited to instrument air valve, desalination water regulating valve, bypass valve, sampling valve, maintenance valve, zero point
Gas regulating valve and range gas regulating valve.
The connecting line includes but is not limited to connecting tube, sampling conduit, steam companions and effluent outfall.
The flowmeter includes but is not limited to desalination water ga(u)ge, by-pass meter and sample introduction flowmeter.
The background gas includes but is not limited to AN, ACN, HCN, H2O、CO、CO2、C3H6、N2。
By above technical scheme as it can be seen that the invention has the following advantages that
1, the present invention is by the polymer in the abundant sample dissolution gas of desalted water, and is separated by filtration the background of the overwhelming majority
The failure rate of oxygen analyzer is effectively reduced in interfering component in gas, reduces business equipment maintenance replacement cost.
2, the present invention uses compressed air-driven refrigerator, drives flow diverter, energy-saving ring using desalination water purification used is washed
It protects, greenization technique.
3, the present invention guarantees that sampling is anhydrous using whirlwind refrigeration, guarantees that injector temperature is constant using steam tracing, uses
Second level pressure stabilizing separation guarantees the constant of sample strain.Ensure the sustainability of entire sampling flowsheet.
4, tail gas of the present invention is discharged into atmosphere at free of contamination carbohydrate through catalysis burning conversion, that is, ensure that ring
Emission request is protected, and solves the problems, such as to be vented the higher influence measured value of back pressure value caused by conventional exhaust pipe.
Detailed description of the invention
Fig. 1 is overall flow figure of the present invention.
Fig. 2 is flow diverter structural schematic diagram in the present invention.
Fig. 3 is pressure stabilizing jar structure and corollary system schematic diagram in the present invention.
Fig. 4 is structure of gas liquid separator schematic diagram in the present invention.
Fig. 5 is Windspout freezer structural schematic diagram in the present invention.
Fig. 6 is the vortex effect refrigeration pipe structural schematic diagram of Windspout freezer in the present invention.
Wherein: 1, sampling probe；2, instrument wind vacuum filter；3, desalination water filter；4, flow diverter；5, vacuum tank；
6, gas-liquid separator；7, vortex effect refrigeration pipe；8, Windspout freezer；9, filter is condensed；10, oxygen analyzer；
41, flow diverter main body；42, diversion pipe；43, injection pipe；44, flange；45, bracket A；46, sealing ring；47, screw；
51, vacuum tank entrance；52, vacuum tank exports；53, lime set mouth；54, gas-liquid equilibrium mouth；55, discharge leakage fluid dram；56,
Safeguard mouth；
61, entrance；62, it exports；63, leakage fluid dram；
71, cold wind exhaust cap；72, O-ring；73, vortex chamber component；74, instrument air air inlet；75, hot-air is vented
Valve；
81, thermometer bushing；82, upper cover；83, lower cover；84, bracket B.
Specific embodiment
One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system, including sampling probe 1, instrument wind depressurize
Filter 2, desalination water filter 3, flow diverter 4, vacuum tank 5, gas-liquid separator 6, Windspout freezer 8, condensation filter 9, oxygen
Analyzer 10, connecting line, instrument, valve and flowmeter, process pipe, sampling probe 1, instrument wind vacuum filter 2, desalination
Between water filter 3, flow diverter 4, vacuum tank 5, gas-liquid separator 6, Windspout freezer 8, condensation filter 9 and oxygen analyzer 10
It is attached by connecting line, vortex effect refrigeration pipe 7 is set in Windspout freezer 8, Windspout freezer 8 uses vortex effect refrigeration pipe 7
As refrigeration main body.
As shown in Figure 1, the instrument includes but is not limited to pressure gauge.The valve include but is not limited to instrument air valve,
Desalination water regulating valve, bypass valve, sampling valve, maintenance valve, zero gas regulating valve and range gas regulating valve.The connecting line includes
But it is not limited to connecting tube, sampling conduit, steam companions and effluent outfall.The flowmeter includes but is not limited to desalination water flow
Meter, by-pass meter and sample introduction flowmeter.The background gas include but is not limited to AN, ACN, HCN, H2O, CO, CO2, C3H6,
N2。
As shown in Fig. 2, the flow diverter 4 includes flow diverter main body 41, diversion pipe 42, injection pipe 43, flange 44, bracket
A45, sealing ring 46 and screw 47, the flow diverter main body 41 are circular ring structure, and the diversion pipe 42 is inserted into flow diverter main body 41
In inner cavity, injection pipe 43 is set on diversion pipe 42, flange 44 is set on injection pipe 43, if being arranged between injection pipe 43 and flange 44
Bracket A45 is arranged on the flange 44 for dry seal circle 46, and several through holes are arranged on the bracket A45, and the through hole is circle
Shape, the screw 47 are connect through the through hole of bracket A45 with flange 44.
The 4 desalination water-driven of flow diverter, the pressure position 0.7Mpa of the desalted water, flow diverter 4 and desalination water regulating valve
Between connecting line be drainage tube, when desalination water regulating valve is in open state, desalination water flow velocity is fast in drainage tube, and speed is up to
1,000,000 turns per minute, so that forming back pressure at 4 entrance 61 of flow diverter, i.e., the pressure in flow diverter 4 and external atmosphere pressure exist
Feeding gas can be squeezed into flow diverter 4 by biggish pressure difference, and the air-water mixture in flow diverter 4 passes through pressure extrusion, can be sprayed
Flow diverter 4 out, therefore, flow diverter 4 do not need setting power source, being capable of effectively save energy consumption.
As shown in figure 3, vacuum tank 5 includes main tank and compensator, the main tank includes vacuum tank entrance 51, vacuum tank outlet
52, lime set mouth 53 and maintenance mouth 56, the compensator include gas-liquid equilibrium mouth 54, discharge leakage fluid dram 55, and the main tank includes interior
Room and mistress are separated by partition between the interior room and mistress, and the partition upper end is fixedly linked with main tank upper wall, it is described every
Plate length is less than main tank height, that is, the interior room of main tank is connected to mistress bottom end, and overflow port is arranged on the main tank side wall, described
Overflow port interconnects main tank and compensator, and gas-liquid equilibrium mouth 54 is arranged in the compensator upper end, and the compensator lower end is set
Discharge leakage fluid dram 55 is set, the discharge leakage fluid dram 55 is U-shaped structure.Guarantee that the upper partial pressure of mistress is constant for atmospheric pressure.Remaining
Drain pipe is inserted into mistress's liquid level hereinafter, forming water seal effect to drain pipe, and liquid level floats up and down internally in tank body
Room top tank air generates pressure stabilization function.
As shown in figure 4, gas-liquid separator 6 includes entrance 61, outlet 62 and leakage fluid dram 63, inlet porting in the entrance 61
61 pipes, 61 pipe of entrance protrude into 6 bottom of gas-liquid separator, and 62 protrusion of outlet is in 6 upper surface of gas-liquid separator, by liquid
Weight power and gas pressure separate gas liquid mixture.Liquid imports 5 mistress of vacuum tank through drain pipe, guarantees secondary steady
Press effect.
As shown in Figure 5,6, vortex effect refrigeration pipe 7 is set in Windspout freezer 8, vortex effect refrigeration pipe 7 include cold wind exhaust cap 71,
O-ring 72, vortex chamber component 73, instrument air air inlet 74 and hot-air exhaust valve 75, on the instrument air air inlet 74
End is connect with vortex chamber component 73, and 74 lower end of instrument air air inlet is fixedly connected with hot-air exhaust valve 75, the instrument
It is connected between table air inlet 74 and hot-air exhaust valve 75 by O-ring 72,73 upper end of the vortex chamber component setting is cold
Wind exhaust cap 71 is connected between the cold wind exhaust cap 71 and vortex chamber component 73 by 72 transition of O-ring.
For blast injection into after vortex effect refrigeration pipe 7, air-flow is rotating flow direction to be up to 1,000,000 turns of speed per minute
Vortex tube hot gas end right-side outlet, a part of air-flow is flowed out by control valve, after remaining gas is blocked, in Primordial Qi stream inner ring
With the reverse rotation of same revolving speed, and flow on the left of vortex tube cold air end.In the process, heat exchange occurs for two strands of air-flows, interior
Ring air-flow becomes terribly cold, flows out from left side, and outer ring air-flow then becomes awfully hot, flows out from right side.The temperature and flow of cold airflow are big
It is small to be controlled by adjusting vortex tube hot gas end valve door.It is higher that vortex tube hot gas brings out gas ratio, then vortex tube cold air end air-flow
Temperature it is lower, flow is also accordingly reduced.
Due to pressure-driven, whole process does not need power drive, it is only necessary to be passed through compressed gas.It can be in high temperature
It works under environment.Inside without any friction between component, can be widely used in sample pretreatment without chemical substances such as refrigerants
In.The cold wind sprayed by 7 cold end of vortex effect refrigeration pipe, is directly sprayed onto the sample line that need to freeze through Windspout freezer 8, fast to sample
Speed refrigeration, 8 tail end of Windspout freezer are equipped with thermometer, can be to refrigeration effect visual monitor.
One kind being used for acrylonitrile installation oxygen analyzer sample gas preprocess method, comprising the following steps:
Step 1, it samples: taking out analysis sample gas from process pipe by sampling probe 1；It is described using probe 1 and raw
Production. art pipeline is connected by common flange.
Step 2, high pressure drains: desalted water flow at high speed in drainage tube forms back pressure at sample inlet 61, drives sample
Product gas enters flow diverter 4.The subnormal ambient is formed at 4 entrance 61 of flow diverter, and desalination water pressure is 0.7Mpa, and desalted water exists
Flow at high speed in drainage tube forms back pressure, after the sample gas sucks flow diverter 4 by negative pressure, into adopting at sample inlet 61
Sample pipeline.
Step 3, mix: analysis sample gas be blended in desalted water mixed in flow diverter 4 after form air-water mixture, spraying
It penetrates in pipe 43 and forms misty air-water mixture.After the sample gas enters flow diverter 4, it is mixed that misty air water is formed with high pressure demineralized water
Close object.The mist air-water mixture carries out high-pressure injection by the drainage pipe of flow diverter 4.
Step 4, pressure stabilizing separates: the misty air-water mixture in step 3 enters vacuum tank 5 through spraying at 4 nozzle of flow diverter,
Initial gross separation is carried out to misty air-water mixture, forms sample gas A.After misty air-water mixture after injection enters vacuum tank 5
It carries out pressure stabilizing and isolates sample gas and liquid water, vacuum tank 5 is provided simultaneously with two kinds of functions of pressure stabilizing and separation.
Step 5, second dehydration: the sample gas A in step 4 is subjected to gas-liquid separation, forms sample gas B；After the separation
Sample gas secondary separation is carried out to gas liquid mixture by liquid gravity and gas pressure through secondary knockout drum.Liquid
State water is flowed to 5 mistress of vacuum tank, while achieving the purpose that secondary pressure.
Step 6, condensation dehydration: the sample gas B in step 4 is condensed, exclude condensate liquid after formed sample gas just at
Product；Sample gas after the secondary separation pressure stabilizing, freezes by whirlwind, forms lime set and is discharged into 5 mistress of vacuum tank, removes sample again
Appended hydrone in product gas achievees the purpose that sample anhydrous, the sample gas after refrigeration, extensive under the action of steam companions
The multiple temperature value to close to before freezing.
Step 7, multistage filtering: the sample gas first product in step 6 is subjected to multistage filtering, filters out sample gas first product
In fine particle after, formed sample gas finished product；More pure sample gas forms final analysis sample through level-one secondary filtration
Product gas, sample gas after washing pass through filter again, greatly reduce the risk of plugged filter.
Step 8, sample introduction is analyzed: the sample gas finished product in step 7 being delivered to oxygen analyzer 10 and is analyzed；
Step 9, post-processing: the sample gas after oxygen analyzer 10 is analyzed in the sample gas and step 8 of bypass loss is collected
Finished product carries out completely burned, forms innocuous substance.Sample gas and oxygen analyzer 10 the outlet tail gas bypassed, which is imported, to be catalyzed
Burner more can completely be converted to innocuous substance through catalytic burner burning, at the same time, ensure that constant and close
The emptying back pressure value of atmospheric pressure.
Claims (6)
1. one kind be used for acrylonitrile installation oxygen analyzer sample gas pretreatment system, including process pipe, sampling probe (1),
Instrument wind vacuum filter (2), desalination water filter (3), flow diverter (4), vacuum tank (5), gas-liquid separator (6), whirlwind system
Cooler (8), condensation filter (9), oxygen analyzer (10), connecting line, instrument, valve and flowmeter, it is characterised in that: technique
Pipeline, sampling probe (1), instrument wind vacuum filter (2), desalination water filter (3), flow diverter (4), vacuum tank (5), gas-liquid
It is attached between separator (6), Windspout freezer (8), condensation filter (9) and oxygen analyzer (10) by connecting line,
Vortex effect refrigeration pipe (7) are set in Windspout freezer (8)；The flow diverter (4) include flow diverter main body (41), diversion pipe (42),
Injection pipe (43), flange (44), bracket A (45), sealing ring (46) and screw (47), the flow diverter main body (41) are annulus knot
Structure, the diversion pipe (42) are inserted into flow diverter main body (41) inner cavity, injection pipe (43) are arranged on diversion pipe (42), injection pipe
(43) flange (44) are set on, are arranged between injection pipe (43) and flange (44) several sealing rings (46), on the flange (44)
It is arranged bracket A (45), several through holes is set on the bracket A (45), the through hole is circle, and the screw (47) is run through
The through hole of bracket A (45) is connect with flange (44)；
Vacuum tank (5) includes main tank and compensator, and the main tank includes vacuum tank entrance (51), vacuum tank outlet (52), lime set
Mouth (53) and maintenance mouth (56), the compensator include gas-liquid equilibrium mouth (54), discharge leakage fluid dram (55), and the main tank includes interior
Room and mistress are separated by partition between the interior room and mistress, and the partition upper end is fixedly linked with main tank upper wall, it is described every
Plate length is less than main tank height, and overflow port is arranged on the main tank side wall, and the overflow port interconnects main tank and compensator,
Gas-liquid equilibrium mouth (54) are arranged in the compensator upper end, and discharge leakage fluid dram (55) are arranged in the compensator lower end, the discharge row
Liquid mouth (55) is U-shaped structure, and gas-liquid separator (6) includes entrance (61), outlet (62) and leakage fluid dram (63), the entrance (61)
Interior inlet porting pipe, the inlet tube protrude into gas-liquid separator (6) bottom, and outlet (62) protrusion is in gas-liquid separator (6)
Upper surface；
Vortex effect refrigeration pipe (7) are set in Windspout freezer (8), vortex effect refrigeration pipe (7) includes cold wind exhaust cap (71), O-ring
(72), vortex chamber component (73), instrument air air inlet (74) and hot-air exhaust valve (75), the instrument air air inlet
(74) upper end is connect with vortex chamber component (73), and instrument air air inlet (74) lower end and hot-air exhaust valve (75) are fixed
Connection is connect between the instrument air air inlet (74) and hot-air exhaust valve (75) by O-ring (72), the vortex chamber
Cold wind exhaust cap (71) are arranged in component (73) upper end, by O-shaped between the cold wind exhaust cap (71) and vortex chamber component (73)
Enclose (72) transition connection.
2. according to claim 1 a kind of for acrylonitrile installation oxygen analyzer sample gas pretreatment system, feature
Be: the instrument includes but is not limited to pressure gauge.
3. according to claim 1 a kind of for acrylonitrile installation oxygen analyzer sample gas pretreatment system, feature
Be: the valve includes but is not limited to instrument air valve, desalination water regulating valve, bypass valve, sampling valve, maintenance valve, zero gas
Regulating valve and range gas regulating valve.
4. according to claim 1 a kind of for acrylonitrile installation oxygen analyzer sample gas pretreatment system, feature
Be: the connecting line includes but is not limited to connecting tube, sampling conduit, steam companions and effluent outfall.
5. according to claim 1 a kind of for acrylonitrile installation oxygen analyzer sample gas pretreatment system, feature
Be: one kind according to claim 1 is used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method,
Be characterized in that: the flowmeter includes but is not limited to desalination water ga(u)ge, by-pass meter and sample introduction flowmeter.
6. one kind is used for acrylonitrile installation oxygen analyzer sample gas preprocess method, it is characterised in that: the following steps are included:
Step 1, it samples: taking out analysis sample gas from process pipe by sampling probe (1)；
Step 2, high pressure drain: desalted water flow at high speed in drainage tube, at sample inlet formed back pressure, drive sample gas into
Enter flow diverter (4).
Step 3, mix: analysis sample gas and desalted water form air-water mixture after being blended in that flow diverter (4) is middle and mixing, and are spraying
Misty air-water mixture is formed in pipe.
Step 4, pressure stabilizing separates: the misty air-water mixture in step 3 enters vacuum tank (5) through spraying at flow diverter (4) nozzle,
Initial gross separation is carried out to misty air-water mixture, forms sample gas A.
Step 5, second dehydration: the sample gas A in step 4 is subjected to gas-liquid separation, forms sample gas B；
Step 6, condensation dehydration: the sample gas B in step 5 is condensed, and forms sample gas first product after excluding condensate liquid；
Step 7, multistage filtering: the sample gas first product in step 6 is subjected to multistage filtering, is filtered out in sample gas first product
After fine particle, sample gas finished product is formed；
Step 8, sample introduction is analyzed: the sample gas finished product in step 7 being delivered to oxygen analyzer (10) and is analyzed；
Step 9, post-processing: collect bypass loss sample gas and step 8 in oxygen analyzer (10) analysis after sample gas at
Product carry out completely burned, form innocuous substance.
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| CN201910334961.9A CN110044676B (en) | 2019-04-24 | 2019-04-24 | Sample gas pretreatment system and method for acrylonitrile device oxygen analyzer |
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| CN201910334961.9A CN110044676B (en) | 2019-04-24 | 2019-04-24 | Sample gas pretreatment system and method for acrylonitrile device oxygen analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075364A (en) * | 2020-12-14 | 2021-07-06 | 西安博纯科技有限公司 | Vehicle-mounted oil gas detector |
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