CN111111481B - System and method for manufacturing trace dissolved ternary mixed gas standard solution - Google Patents
System and method for manufacturing trace dissolved ternary mixed gas standard solution Download PDFInfo
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- CN111111481B CN111111481B CN202010061632.4A CN202010061632A CN111111481B CN 111111481 B CN111111481 B CN 111111481B CN 202010061632 A CN202010061632 A CN 202010061632A CN 111111481 B CN111111481 B CN 111111481B
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- 239000012086 standard solution Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 35
- 239000007789 gas Substances 0.000 claims abstract description 201
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 239000012159 carrier gas Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000011550 stock solution Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 2
- 239000000243 solution Substances 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 230000002457 bidirectional effect Effects 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003926 complexometric titration Methods 0.000 description 2
- 238000003113 dilution method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F35/93—Heating or cooling systems arranged inside the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F2035/99—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2111—Flow rate
- B01F35/21111—Mass flow rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2113—Pressure
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The embodiment of the utility model discloses a system for manufacturing a trace dissolved ternary mixed gas standard solution, which comprises a fixed-proportion gas conveying unit; the gas mixing unit is used for mixing the component gas and the carrier gas supplied by the fixed-ratio gas conveying unit to obtain intermediate gas; a liquid supply unit for supplying high-purity washing water and spraying a stock solution; and calibrating the volume and the gas pressure of the intermediate gas in a constant-temperature sealing environment to obtain a target gas, calibrating the volume of the stock solution in the constant-temperature sealing environment to obtain a target liquid, continuously stirring and mixing the target gas and the target liquid to obtain a standard solution, dynamically discharging the standard solution, controlling the mass flow of the gas by a high-precision mass flow controller, fully and uniformly mixing the gas and the solution in a multiple mixing mode, and finally outputting the dynamic standard solution without being influenced by temperature and pressure conditions and generating any waste gas or waste liquid harmful to the environment.
Description
Technical Field
The embodiment of the utility model relates to the technical field of preparation of trace dissolved ternary mixed gas standard solutions, in particular to a system and a method for preparing trace dissolved ternary mixed gas standard solutions.
Background
The standard mixed gas is prepared by taking a high-purity gas as diluent gas and adding one or more other high-purity gases, and mainly comprises a weighing method, a partial pressure method, a volume method, a permeation method, a saturation method, an electrolytic method, an index dilution method and the like. The standard solution is prepared by a capacity method, a neutralization method, a redox method, a complexometric titration method, a constant trace water-soluble gas standard solution preparation system method and the like.
The standard gas preparation methods such as a weighing method, a partial pressure method, a volume method, a permeation method, a saturation method, an electrolysis method, an index dilution method and the like are only suitable for preparing fixed-value mixed standard gas;
the preparation methods of standard solutions such as a capacity method, a neutralization method, a redox method, a complexometric titration method and the like are only suitable for preparing standard solutions with non-gas as a main object;
the constant-value trace water-soluble gas standard solution manufacturing system method can manufacture standard solution taking water-soluble gas as a main body target according to a headspace balance gas chromatography test principle, but can be realized by a plurality of sets of system methods such as a pressure-resistant stock solution barrel, a gas calibration liquid preparation device, a gas chromatography unit and the like, and the method belongs to a static manufacturing method in terms of dynamics, and the quantity of calibration liquid manufactured each time is limited and continuous output cannot be provided;
none of the above existing methods can meet the requirement of dynamic production of trace dissolved ternary mixed gas standard solution.
Disclosure of Invention
Therefore, the embodiment of the utility model provides a system and a method for manufacturing a trace dissolved ternary mixed gas standard solution, which solve the problem that the existing method cannot meet the requirement of dynamic manufacturing of the trace dissolved ternary mixed gas standard solution.
In order to achieve the above object, the embodiments of the present utility model provide the following technical solutions:
a system for preparing trace dissolved ternary mixed gas standard solution comprises
The fixed proportion gas conveying unit is used for providing component gas and carrier gas in a preset proportion;
the gas mixing unit is used for mixing the component gas and the carrier gas supplied by the fixed-ratio gas conveying unit to obtain intermediate gas;
a liquid supply unit for providing high-purity cleaning water and spraying stock solution;
and the gas-liquid mixer is used for calibrating the volume and the gas pressure of the intermediate gas in a constant-temperature sealing environment to obtain target gas, calibrating the volume of the stock solution in the constant-temperature sealing environment to obtain target liquid, continuously stirring and mixing the target gas and the target liquid to obtain a standard solution, and dynamically discharging the standard solution.
As a preferred embodiment of the present utility model, the proportional delivery unit includes a plurality of first branch pipes for delivering the component gas and a second branch pipe for delivering the carrier gas, and a vacuum system for realizing a near vacuum state of the first branch pipe, the second branch pipe, the gas mixing unit, and the gas-liquid mixer.
As a preferable scheme of the utility model, the first branch pipe, the second branch pipe and the pipeline of the vacuum system are respectively provided with a pressure sensor and a mass flow controller.
As a preferable scheme of the utility model, the gas mixing unit comprises a total branch pipeline connected with the vacuum system and the gas-liquid mixer and a turbofan gas mixing mechanism arranged on the total branch pipeline, the turbofan gas mixing mechanism is connected with the fixed-proportion gas conveying unit and receives the component gas and the carrier gas, and a ventilation coil pipe for spraying mixed gas of the component gas and the carrier gas is arranged at the tail end of the total branch pipeline extending into the gas-liquid mixer;
the main pipeline inside the gas-liquid mixer is provided with a spiral pipe, and the main pipeline between the spiral pipe and the turbofan gas mixing mechanism is connected through a quick connector.
As a preferable mode of the utility model, the turbofan gas mixing mechanism is connected with a straight pipe main body of the target gas which is mixed by the gas-liquid mixer and discharged through a pressure release valve arranged on the gas-liquid mixer, and the straight pipe main body is provided with a one-way valve.
As a preferable scheme of the utility model, the pressure relief valve is internally provided with an internal pressure sensor for monitoring the internal top pressure of the gas-liquid mixer, and an electric signal of the internal top pressure of the gas-liquid mixer, which is acquired by the internal pressure sensor, is used as a driving signal for the one-way valve to work.
As a preferable scheme of the utility model, the gas-liquid mixer specifically comprises a mixing bin body, the gas proportion conveying mechanism is connected with the mixing bin body through a total division pipeline, the mixing bin body is internally provided with a stirring mechanism for forming convection with gas sprayed by the ventilation coil pipe, the bottom of the mixing bin body is provided with a magnetic heating stirrer, and the bottom of the mixing bin body is provided with a stirrer driven to rotate by the magnetic heating stirring mechanism;
the liquid supply unit comprises a water inlet pipe, a stock solution inlet pipe and a standard liquid outlet pipe which are arranged on the mixing bin body, and the tail end of the stock solution inlet pipe, which is positioned in the mixing bin body, is connected with a water spraying coil pipe.
As a preferable scheme of the utility model, a heat-preservation water jacket is arranged in the inner wall of the mixing bin body, and the medium in the heat-preservation water jacket is heated by a magnetic heating stirring mechanism.
The utility model provides a method for preparing a trace dissolved ternary mixed gas standard solution, which comprises the following specific steps:
s100, primarily mixing component gas and carrier gas according to a preset proportion to obtain intermediate gas;
s200, continuously introducing the intermediate gas into a constant-temperature closed environment, and simultaneously heating and stirring to perform secondary mixing;
s300, when the air pressure in the constant-temperature closed environment reaches a preset pressure value, obtaining target gas, stopping introducing the intermediate gas, and simultaneously adding the stock solution into the constant-temperature closed environment until the target gas is completely discharged out of the constant-temperature closed environment;
and S400, continuously introducing intermediate gas in a state of continuously stirring by a magnetic stirrer after the pressure of the liquid in the closed environment to be at the fixed temperature is stable, continuously introducing the stock solution, obtaining a standard solution, and continuously and dynamically outputting the standard solution.
As a preferable scheme of the utility model, the preset proportion of the component gas and the carrier gas is based on the dilution ratio of the component gas and the carrier gas obtained by the initial concentration of the component gas, the flow of the carrier gas, the outlet flow of the mixed gas of the component gas and the carrier gas and the dynamic output target liquid flow, and the ratio of the flow of each component gas and the flow of the carrier gas is obtained by derivation calculation.
Embodiments of the present utility model have the following advantages:
the high-precision mass flow controller controls the mass flow of the gas, and the gas and the solution are fully and uniformly mixed in multiple mixing modes such as a spiral pipe, a ventilation coil pipe, a three-dimensional spiral mixing blade, a magnetic heating stirrer and the like, so that the dynamic standard solution is finally output.
The preparation process of the standard liquid is not affected by temperature and pressure conditions, does not generate any waste gas or waste liquid harmful to the environment, has high preparation efficiency and high precision, can continuously and dynamically output, and is safe, stable, green, environment-friendly, simple in device, low in cost and convenient to operate.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.
FIG. 1 is a block diagram of a system for preparing a trace dissolved ternary mixed gas standard solution in an embodiment of the utility model;
FIG. 2 is a schematic diagram of a proportional gas delivery cell in accordance with an embodiment of the present utility model;
FIG. 3 is a schematic view of a blade structure in an embodiment of the present utility model;
FIG. 4 is a schematic flow chart of a control method for preparing a mixed gas standard solution according to an embodiment of the utility model;
FIG. 5 is a schematic view of a quick connector according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a gas-liquid mixer in an embodiment of the utility model;
fig. 7 is a block diagram of a production system according to an embodiment of the present utility model.
In the figure:
1-a first branch pipe; 2-a second branch pipe; 3-a vacuum system; 4-a pressure sensor; 5-mass flow controller; 6-total branch pipeline; 7-a turbofan gas mixing mechanism; 8-ventilation coil; 9-spiral tube; 10-quick connector; 11-a straight tube body; 12-an internal pressure sensor; 13-screen separator; 14-a pressure release valve; 15-a one-way valve; 16-mixing bin body; 17-a water inlet pipe; 18-raw liquid inlet pipe; 19-a standard liquid outlet pipe; 20-a water spraying coil pipe; 21-a central spindle; 22-a magnetic heating stirring mechanism; 23-stirring; 24-a heat-preserving water jacket; 25-fixing rings; 26-paddle; 27-inner blades; 28-outer blades; 29-a deflector; 30-radiating rods;
101-a bidirectional tube body; 102-a thread segment; 103-threaded sleeve; 104-reducing layer sleeve; 105-isodiametric tube; 106-bulge; 107-an annular groove; 108-embedding ring grooves; 109-annular latch; 110-an inner seal ring;
701-upper chamber; 702-a lower chamber; 703-turbofan.
Detailed Description
Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in FIG. 7, the utility model provides a system for preparing a trace dissolved ternary mixed gas standard solution, which comprises
The fixed proportion gas conveying unit is used for providing component gas and carrier gas in a preset proportion;
the gas mixing unit is used for mixing the component gas and the carrier gas supplied by the fixed-ratio gas conveying unit to obtain intermediate gas;
a liquid supply unit for providing high-purity cleaning water and spraying stock solution;
and the gas-liquid mixer is used for calibrating the volume and the gas pressure of the intermediate gas in a constant-temperature sealing environment to obtain target gas, calibrating the volume of the stock solution in the constant-temperature sealing environment to obtain target liquid, continuously stirring and mixing the target gas and the target liquid to obtain a standard solution, and dynamically discharging the standard solution.
As shown in fig. 1 to 6, the present utility model provides a gas control system for the above component gas and carrier gas, comprising a proportional gas delivery unit and a gas mixing unit, comprising a plurality of first branch pipes 1 for component gas delivery and a second branch pipe 2 for carrier gas delivery, and a vacuum system 3 for realizing a near vacuum state of the first branch pipe 1, the second branch pipe 2, the gas mixing unit and the mixer.
The first branch pipe 1 and the second branch pipe 2 are respectively provided with a pressure sensor 4 and a mass flow controller 5 on the pipeline of the vacuum system 3, the gas pressure, the flow and the mass in the conveying pipeline are detected in real time, the flow and the mass in the conveying pipeline are regulated in real time through the mass flow controllers 5,
the utility model also arranges the through valve at the two ends of the first branch pipe 1 and the second branch pipe positioned at the mass flow controller 5, which is used for closing the conveying state in the conveying pipeline, and starting the vacuum system 3 by closing the through valve, so as to be convenient for completing the near vacuum state in the conveying pipeline.
The component gas supply device of the first branch pipe 1 may be a gas supply bottle, and the gas supply device of the carrier gas of the second branch pipe 2 may be a gas carrier bottle.
The utility model further provides a primary mixing device for mixing the carrier gas and the component gas, namely a gas mixing unit, which specifically comprises a total distribution pipeline 6 for connecting a vacuum system 3 and a mixer and a turbofan gas mixing mechanism 7 arranged on the total distribution pipeline 6, wherein the turbofan gas mixing mechanism 7 is connected with a fixed-proportion gas conveying unit and is used for receiving the component gas and the carrier gas, and a ventilation coil 8 for spraying the mixed gas of the component gas and the carrier gas is arranged at the tail end of the total distribution pipeline 6 extending into the interior of the mixer;
the flow rate of the mixed gas conveyed by the fixed ratio gas conveying unit is changed through the turbofan gas mixing mechanism 7, and the flow rate of the mixed gas conveyed by the total distribution pipeline 6 into the mixer is controlled by the turbofan gas mixing mechanism 7.
The main branch pipe positioned in the mixed gas is provided with a spiral pipe 9, and the main branch pipe positioned between the spiral pipe 9 and the turbofan gas mixing mechanism 7 is connected through a quick connector 10.
The turbofan gas mixing mechanism 7 includes an upper chamber 701 for connecting the first branch pipe 1 and a lower chamber 702 for connecting the second branch pipe 2, and for mixing the carrier gas with the component gas, the upper chamber 701 and the lower chamber 702 being internally provided with a coaxially rotating turbofan 703, and the inside of the upper chamber 701 and the inside of the lower chamber 702 being in a communicating state;
it is further noted that the scroll fan 703 inside the upper chamber 701 and the lower chamber 702 may be coaxially rotated, or may be rotated by two rotating shafts respectively.
The vacuum system 3 is connected to the junction of the second branch pipe 2 and the lower chamber 702 by a pipe.
In operation, component gas flows into the turbofan gas mixing mechanism 7 through the first branch pipe 1, is mixed with carrier gas entering the lower chamber 702 through the second branch pipe 2 after preliminary mixing of the upper chamber 701, and finally the gas mixed with the carrier gas is sent into the spiral pipe 9 through the main branch pipe, and finally is sprayed out through the ventilation coil pipe 8.
The lower chamber 702 is connected to a straight pipe body 11 for the target gas, which is mixed by the gas-liquid mixer and discharged through a pressure release valve 14 provided in the gas-liquid mixer.
The inside of the straight pipe main body 11 is provided with a silk screen separating body 13 for gas-liquid separation, and the straight pipe main body 11 is provided with a one-way valve 15.
The pressure release valve 14 is internally provided with an internal pressure sensor 12 for monitoring the internal top pressure of the gas-liquid mixer, and an electric signal of the internal top pressure of the gas-liquid mixer collected by the internal pressure sensor 12 is used as a driving signal for the operation of the one-way valve 15.
When the air pressure of the target gas in the gas-liquid mixer in the constant-temperature closed environment reaches a preset pressure value, stopping introducing the intermediate gas, and simultaneously adding the prepared stock solution into the constant-temperature closed environment until the target gas is completely discharged from the gas-liquid mixer;
after the pressure of the liquid in the gas-liquid mixer is stable, the stock solution is kept to be continuously introduced, the standard solution is obtained, the standard solution is continuously and dynamically output, and when the standard solution is continuously output, the gas which is not completely dissolved with the stock solution overflows the surface of the stock solution under the influence of the flow of a standard solution outlet pipe of the dynamic output standard solution, and is further accumulated at the inner top of the gas-liquid mixer, when the pressure value of the target gas at the inner top of the gas-liquid mixer reaches the set value of a pressure release valve 14, an electric signal is transmitted by an inner pressure sensor 12, a one-way valve 15 on a straight pipe main body 11 is opened, so that the target gas at the inner top of the gas-liquid mixer enters a lower-layer cavity 702 for repeated circulating dissolution.
Meanwhile, in order not to influence the standard solution to enter the lower chamber 702 and further influence the proportion of component gas and carrier gas of the fixed proportion gas conveying unit, a screen separator 13 for gas-liquid separation is arranged in the straight pipe main body 11, and the mixed gas of the component gas and the carrier gas in the lower chamber 702 is prevented from reversely entering a gas-liquid mixer through a one-way valve 15 and further influence the calibration of the standard solution.
The utility model further provides a gas-liquid mixing device for mixing the mixed gas of the carrier gas and the component gas with the stock solution, namely a gas-liquid mixer, which specifically comprises a mixing bin body 16, wherein a fixed proportion gas conveying unit is connected with the mixing bin body 16 through a total distribution pipeline 6, a mixing bin body 15 is arranged in the mixing bin body 16, a stirring mechanism for forming convection with the gas sprayed by the ventilation coil 9 is arranged in the mixing bin body 16, a magnetic heating stirring mechanism 22 is arranged at the bottom of the mixing bin body 16, and a stirrer 23 driven to rotate by the magnetic heating stirring mechanism 22 is arranged in the bottom of the mixing bin body 16;
the liquid supply unit comprises a water inlet pipe 17, a stock solution inlet pipe 18 and a standard liquid outlet pipe 19 which are arranged on the mixing bin body 16, and the tail end of the stock solution inlet pipe 18 positioned in the mixing bin body 16 is connected with a water spraying coil pipe 20.
The stirring mechanism comprises a central rotating shaft 21 and mixing blades which are arranged on the central rotating shaft 21 at equal intervals, the mixing blades comprise a fixed ring 25 which is in contact with the inner wall of the mixing bin body 16, and blades 26 which are spirally arranged between the central rotating shaft 21 and the fixed ring 25, the blades 26 comprise inner blades 27 for forming downward flow and outer blades 28 for forming upward flow, the radial distance of the inner blades is smaller than that of the outer blades 28, and flow deflectors 29 for maintaining the upward flow or the downward flow are arranged between the outer blades 28 and the inner blades 27.
The inner blade 27 and the outer blade 28 are connected to the same radiation rod 30 along the radial direction of the fixed ring, and two ends of the radiation rod 30 are respectively connected to the central rotating shaft 21 and the fixed ring 25, and the spiral directions of the inner blade 27 and the outer blade 28 are opposite.
There are two working states of the present utility model,
firstly, the central rotating shaft 21 can be driven to rotate by an external driving mechanism, such as a motor or a motor;
secondly, the air pipe 8 sprays directional air into the mixing bin 16 to form directional vortex flow, or the water pipe sprays directional water flow into the mixing bin 16 to form directional vortex flow, at this time, the central rotating shaft 1 is fixedly arranged on the mixing bin 16, and the blade 3 is arranged on the central rotating shaft through a bearing.
And each blade of the blade is provided with a strip-shaped penetrating groove for guiding the water body.
The paddles in any working state can realize that the water flow in the mixing bin body 16 forms a circulating water flow in the form of a magnetic field, for example, and the specific forming mode of the circulating water flow is as follows:
the water body forms the water flow column under the rotation direction of the inner blade and is in positive contact with the ventilation coil pipe positioned at the bottom of the mixing bin body 16, and the contact surface of the air flow column and the ventilation coil pipe can be increased as much as possible due to the fact that the air sprayed out of the ventilation coil pipe has a certain outlet speed, the water body formed by the inner blade and the outer blade is separated under the flow guiding effect of the flow guiding sheet, the water body formed by the inner blade and the outer blade is circulated from bottom to top, the contact path of the air and the liquid is increased, and the air and the liquid can be fully mixed.
The inner blade and the outer blade are connected to the same radiation rod along the radial direction of the fixed ring, and the two ends of the radiation rod are respectively connected to the central rotating shaft and the fixed ring, so that the spiral directions of the inner blade and the outer blade are opposite.
The inner blade and the outer blade have a height difference of 2-3 cm in the axial direction, the radial width of the inner blade and the outer blade along the fixed ring is gradually reduced, an angle difference of 10-30 degrees exists between the inner blade and the outer blade, the flow velocity of inner water flow and the flow velocity of outer water flow are different, the inner blade is larger than the outer blade in width due to the fact that the blade width is larger than the outer blade, the water flow circulation speed formed by the inner blade is slow than the water flow speed formed by the outer blade, and then the contact time of the water flow formed by the inner blade and the sprayed gas of the ventilation coil is long.
Further, the ventilation coil pipe 8 is specifically an annular pipe with uniformly distributed air holes.
The guide vane 29 is located between two adjacent inner paddles 27, and two ends of the guide vane 29 are respectively connected to two adjacent radiation rods.
The tail end of the outer blade is incompletely connected with the inner wall of the fixed ring, and the section of the fixed ring is in an inverse normal distribution curve shape.
Further, the utility model also provides a stirring paddle utilizing the mixing blade, which comprises the step of equally mounting the mixing blade on a central rotating shaft, wherein the bottom of the central rotating shaft is provided with a plurality of supporting frames embedded on the bottom wall of the mixing bin body 16.
The ventilation coil pipe 8 is positioned at the upper part of the stirrer 23, mixed gas is sprayed upwards from the bottom of the mixing bin body 16, and the stock solution inlet pipe 18 is positioned on the side wall of the top of the mixing bin body 16.
The inner wall of the mixing bin body 16 is provided with a heat-insulating water jacket 24, a medium in the heat-insulating water jacket 24 is heated by a magnetic heating stirring mechanism 22, a magnetic heating stirrer drives a stirrer 23 in the mixing bin body 16 to move, a stirring effect is achieved on gas, and a constant-temperature mixing environment is provided for the inside of the mixing bin body 16 by the heat-insulating water jacket 24.
Further, the utility model provides a quick connector, which specifically comprises a bidirectional pipe body 101 and two threaded sleeves 103 which are spirally connected to the bidirectional pipe body 101 through threaded sections 102; the threaded sleeve 103 is movably sleeved on the bidirectional pipe body 101, a hose for connecting a container tank in the process of manufacturing the constant value ternary mixed standard gas is sleeved at two ends of the bidirectional pipe body 101, the threaded sleeve 103 is rotated again, so that the hose is sleeved between the threaded sleeve 103 and the bidirectional pipe body 101, the hose is compressed through the threaded sleeve 103, and the hose is unlocked by reversely rotating the threaded sleeve 103.
The joint of traditional quick-operation joint 10 is the non-slip joint 106 of direct setting layer cover, and the hose is direct to be overlapped on non-slip joint 106, carries out the quick-operation joint of pipeline, and this kind of connection side is especially unable suitable under the higher condition of the accurate requirement to gas or liquid in the laboratory, and when the atmospheric pressure or the hydraulic pressure in the pipe are the change, the junction of hose and quick-operation joint 10 produces inflation or shrink easily, and then makes gas leak or inhale external air, and then influences the result of experiment.
In the utility model, the diameter-variable layer sleeves 104 are arranged at the two ends of the bidirectional pipe body 101, the tail ends of the diameter-variable layer sleeves 104 are provided with the constant diameter pipes 105, the constant diameter pipes 105 are used for enlarging the surface contacted with the inner wall of the hose in parallel, and no matter how the air pressure in the hose changes when the hose is sleeved with the constant diameter pipes 105, the hose can not expand and leak at the joint.
The constant diameter pipe 105 is provided with an annular groove 107 matched with a bulge 106 arranged inside the threaded sleeve 103, the joint of the diameter-variable layer sleeve 104 and the bidirectional pipe body 101 is provided with a self-sealing structure, the self-sealing structure comprises an embedded annular groove 108 arranged on the bidirectional pipe body 101 and an annular pin tongue 109 arranged inside the threaded sleeve 103, and an inner sealing ring 110 is arranged in the embedded annular groove 108.
The utility model also forms a sealed space to form a sealed chamber with stable pressure by combining the threaded sleeve 103 and the reducing layer sleeve 104 when the total branch pipeline 6 is sleeved with the reducing layer sleeve 104, and can ensure the connection stability of the total branch pipeline 6 and avoid the air leakage when the pressure in the hose is too large or too small.
The bidirectional pipe body 101 positioned at the outer side of the embedded ring groove 108 is provided with an outer sealing ring, the contact surface of the embedded ring groove 108 and the annular pin tongue 109 is an inclined surface, the inclined angle of the inclined surface is 10-20 degrees, and the axial length of the annular pin tongue 109 is 1-2 mm shorter than that of the embedded ring groove 108.
The threaded sleeve 103 comprises a straight tube section and a frustoconical section inside and the frustoconical section extends axially to the root of the annular pin tongue 109.
The diameter of each sleeve of the diameter-variable layer sleeve 104 is gradually increased until the diameter is the same as that of the constant diameter pipe 105.
The bulge 106 comprises two adjacent semicircular bulge loops, a certain gap exists between the two bulge loops, the height of the bulge loop positioned at the inner side is higher than that of the bulge loop positioned at the outer side, the bulge loop positioned at the outer side is used for clamping a hose in the annular groove 107 in the long-time sleeving process, the hose is buckled into the annular groove 107 by the bulge loop positioned at the outer side, and the deformed part of the hose is pressed on the surface of the equal-diameter pipe 105 by the bulge loop positioned at the inner side, so that the sealing is realized;
and is suitable for the hose with the pipe diameter of 2-3 mm difference, when the hose is sleeved, the pipe wall of the hose is pressed into the annular groove 107 by the inner convex ring when the pipe diameter is thinner, and the outer convex ring presses the part of the hose positioned outside the annular groove 107 on the surface of the equal-diameter pipe 105.
The utility model provides a method for preparing a trace dissolved ternary mixed gas standard solution, which comprises the following specific steps:
s100, primarily mixing component gas and carrier gas according to a preset proportion to obtain intermediate gas;
s200, continuously introducing the intermediate gas into a constant-temperature closed environment, and simultaneously heating and stirring to perform secondary mixing;
s300, when the air pressure in the constant-temperature closed environment reaches a preset pressure value, obtaining target gas, stopping introducing the intermediate gas, and simultaneously adding the stock solution into the constant-temperature closed environment until the target gas is completely discharged out of the constant-temperature closed environment;
and S400, continuously introducing intermediate gas in a state of continuously stirring by a magnetic stirrer after the pressure of the liquid in the closed environment to be at the fixed temperature is stable, continuously introducing the stock solution, obtaining a standard solution, and continuously and dynamically outputting the standard solution.
The preset proportion of the component gas and the carrier gas is based on the dilution ratio of the component gas and the carrier gas obtained by the initial concentration of the component gas, the flow of the carrier gas, the outlet flow of the mixed gas of the component gas and the carrier gas and the dynamic output target liquid flow, and the ratio of the flow of each component gas to the flow of the carrier gas is obtained by derivation calculation.
In S300, the stock solution is added to the constant temperature sealed environment until the target gas is completely discharged from the constant temperature sealed environment, and the pressure value of the target gas discharged from the constant temperature sealed environment is set to 1atm.
In S400, after the pressure of the liquid in the sealed environment is stable, the stable state of the pressure of the liquid is maintained for 5min.
While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (4)
1. A system for preparing a trace dissolved ternary mixed gas standard solution is characterized by comprising
The fixed proportion gas conveying unit is used for providing component gas and carrier gas in a preset proportion;
the gas mixing unit is used for mixing the component gas and the carrier gas supplied by the fixed-ratio gas conveying unit to obtain intermediate gas;
a liquid supply unit for providing high-purity cleaning water and spraying stock solution;
the gas-liquid mixer is used for calibrating the volume and the gas pressure of the intermediate gas in a constant-temperature sealing environment to obtain target gas, calibrating the volume of the stock solution in the constant-temperature sealing environment to obtain target liquid, continuously stirring and mixing the target gas and the target liquid to obtain a standard solution, and dynamically discharging the standard solution;
the proportional gas conveying unit comprises a plurality of first branch pipes (1) for conveying component gas, a second branch pipe (2) for conveying carrier gas, and a vacuum system (3) for realizing the near vacuum state of the first branch pipe (1), the second branch pipe (2), the gas mixing unit and the gas-liquid mixer;
the pressure sensor (4) and the mass flow controller (5) are arranged on the first branch pipe (1), the second branch pipe (2) and the pipeline of the vacuum system (3);
the gas mixing unit comprises a total branch pipeline (6) connected with the vacuum system (3) and the gas-liquid mixer and a turbofan gas mixing mechanism (7) arranged on the total branch pipeline (6), the turbofan gas mixing mechanism (7) is connected with the fixed-proportion gas conveying unit and receives the component gas and the carrier gas, and a ventilation coil (8) for spraying mixed gas of the component gas and the carrier gas is arranged at the tail end of the total branch pipeline (6) extending into the gas-liquid mixer;
a spiral pipe (9) is arranged on a total branch pipeline (6) positioned in the gas-liquid mixer, and the total branch pipeline (6) positioned between the spiral pipe (9) and the turbofan gas mixing mechanism (7) is connected through a quick connector (10);
the turbofan gas mixing mechanism (7) is connected with a straight pipe main body (11) of the target gas which is mixed by the gas-liquid mixer and discharged through a pressure release valve (14) arranged on the gas-liquid mixer, and a one-way valve (15) is arranged on the straight pipe main body (11);
the turbofan gas mixing mechanism (7) comprises an upper chamber (701) used for connecting the first branch pipe (1) and a lower chamber (702) connected with the second branch pipe (2), the lower chamber (702) is used for mixing carrier gas and component gas, a coaxially rotating turbofan (703) is arranged inside the upper chamber (701) and the lower chamber (702), and the upper chamber (701) and the lower chamber (702) are communicated;
the gas-liquid mixer comprises a mixing bin body (16), the fixed-proportion gas conveying unit is connected with the mixing bin body (16) through a total distribution pipeline (6), the mixing bin body (16) is internally provided with a stirring mechanism for forming convection with gas sprayed out of the ventilation coil pipe (8), the bottom of the mixing bin body (16) is provided with a magnetic heating stirring mechanism (22), and the bottom in the mixing bin body (16) is provided with a stirring rod (23) driven by the magnetic heating stirring mechanism (22);
the liquid supply unit comprises a water inlet pipe (17), a stock solution inlet pipe (18) and a standard liquid outlet pipe (19) which are arranged on the mixing bin body (16), and the tail end of the stock solution inlet pipe (18) positioned in the mixing bin body (16) is connected with a water spraying coil pipe (20);
the stirring mechanism comprises a central rotating shaft (21) and mixing blades which are arranged on the central rotating shaft (21) at equal intervals, wherein each mixing blade comprises a fixed ring (25) which is in contact with the inner wall of a mixing bin body (16), and blades (26) which are arranged between the central rotating shaft (21) and the fixed rings (25) in a spiral mode, each blade (26) comprises an inner blade (27) used for forming a descending flow and an outer blade (28) used for forming an ascending flow and the radial distance of the outer blade is smaller than that of the inner blade (27), and a flow guide sheet (29) used for maintaining the ascending flow or the descending flow is arranged between the outer blade (28) and the inner blade (27);
an internal pressure sensor (12) for monitoring the internal top pressure of the gas-liquid mixer is arranged in the pressure release valve (14), and an electric signal of the internal top pressure of the gas-liquid mixer, which is acquired by the internal pressure sensor (12), is used as a driving signal of the one-way valve (15) to work.
2. The system for preparing the trace dissolved ternary mixed gas standard solution according to claim 1, wherein a heat-preserving water jacket (24) is arranged in the inner wall of the mixing bin body (16), and a medium in the heat-preserving water jacket (24) is heated by a magnetic heating stirring mechanism (22).
3. A method for producing a trace dissolved ternary mixed gas standard solution based on the production system of a trace dissolved ternary mixed gas standard solution according to any one of claims 1-2, characterized by comprising the following specific steps:
s100, primarily mixing component gas and carrier gas according to a preset proportion to obtain intermediate gas;
s200, continuously introducing the intermediate gas into a constant-temperature closed environment, and simultaneously heating and stirring to perform secondary mixing;
s300, when the air pressure in the constant-temperature closed environment reaches a preset pressure value, obtaining target gas, stopping introducing the intermediate gas, and simultaneously adding the stock solution into the constant-temperature closed environment until the target gas is completely discharged out of the constant-temperature closed environment;
s400, after the pressure of the liquid in the closed environment to be at the fixed temperature is stable, continuously introducing intermediate gas in a state of continuously stirring by a magnetic stirrer, continuously introducing the stock solution to obtain a standard solution, and continuously and dynamically outputting the standard solution;
when the standard solution is continuously output, the gas which is not completely dissolved with the stock solution overflows the surface of the stock solution under the influence of the flow of the standard solution outlet pipe of the dynamic output standard solution, and is accumulated on the inner top of the gas-liquid mixer, when the pressure value of the target gas on the inner top of the gas-liquid mixer reaches the set value of the pressure release valve, the internal pressure sensor transmits an electric signal, and the one-way valve on the straight pipe main body is opened, so that the target gas on the inner top of the gas-liquid mixer enters the lower-layer cavity to be circularly dissolved again.
4. The method for preparing a trace dissolved ternary mixed gas standard solution according to claim 3, wherein the preset ratio of component gas to carrier gas is based on the initial concentration of component gas, the flow rate of carrier gas, the outlet flow rate of mixed gas of component gas and carrier gas and the dynamic output target liquid flow rate, so as to obtain the dilution ratio of component gas to carrier gas, and further obtain the ratio of the flow rate of each component gas to the flow rate of carrier gas through derivation calculation.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888895A (en) * | 2005-06-27 | 2007-01-03 | 天津师范大学 | Method and instrument for determining PH value and inorganic carbon form through measuring density of CO2 |
| EP2255880A2 (en) * | 2005-06-21 | 2010-12-01 | Tecan Trading AG | System and method to prevent air bubbles in a hybridization chamber |
| CN102434325A (en) * | 2011-12-23 | 2012-05-02 | 张家港富瑞特种装备股份有限公司 | Natural gas mixer of helical type blade for engine |
| CN103341330A (en) * | 2013-06-27 | 2013-10-09 | 江苏物联网研究发展中心 | Standard gas distribution device for gas testing system |
| CN203422675U (en) * | 2013-07-25 | 2014-02-05 | 上海上计群力分析仪器有限公司 | Dynamic trace gas concentration distributing apparatus |
| KR20180052043A (en) * | 2016-11-09 | 2018-05-17 | 파워켐텍 주식회사 | Standard gas solution production equipment |
| CN108144511A (en) * | 2017-11-28 | 2018-06-12 | 江苏省计量科学研究院 | A kind of solution mixing arrangement and mixed method |
| CN108192819A (en) * | 2018-03-06 | 2018-06-22 | 寿光新润科技中介服务有限公司 | A kind of biofermentation reaction kettle of the anti-compaction adjusted equipped with temperature |
| CN109406241A (en) * | 2018-12-20 | 2019-03-01 | 防灾科技学院 | A kind of water-soluble gas standard experimental solutions manufacturing system of definite value trace |
| CN110229354A (en) * | 2019-06-24 | 2019-09-13 | 中国科学院宁波材料技术与工程研究所 | A kind of method and system dissolving cellulose |
| CN209476025U (en) * | 2018-12-20 | 2019-10-11 | 防灾科技学院 | It is a kind of to determine gas liquid dispensing device |
| CN212119605U (en) * | 2020-01-19 | 2020-12-11 | 防灾科技学院 | Manufacturing system for trace dissolved ternary mixed gas standard solution |
-
2020
- 2020-01-19 CN CN202010061632.4A patent/CN111111481B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2255880A2 (en) * | 2005-06-21 | 2010-12-01 | Tecan Trading AG | System and method to prevent air bubbles in a hybridization chamber |
| CN1888895A (en) * | 2005-06-27 | 2007-01-03 | 天津师范大学 | Method and instrument for determining PH value and inorganic carbon form through measuring density of CO2 |
| CN102434325A (en) * | 2011-12-23 | 2012-05-02 | 张家港富瑞特种装备股份有限公司 | Natural gas mixer of helical type blade for engine |
| CN103341330A (en) * | 2013-06-27 | 2013-10-09 | 江苏物联网研究发展中心 | Standard gas distribution device for gas testing system |
| CN203422675U (en) * | 2013-07-25 | 2014-02-05 | 上海上计群力分析仪器有限公司 | Dynamic trace gas concentration distributing apparatus |
| KR20180052043A (en) * | 2016-11-09 | 2018-05-17 | 파워켐텍 주식회사 | Standard gas solution production equipment |
| CN108144511A (en) * | 2017-11-28 | 2018-06-12 | 江苏省计量科学研究院 | A kind of solution mixing arrangement and mixed method |
| CN108192819A (en) * | 2018-03-06 | 2018-06-22 | 寿光新润科技中介服务有限公司 | A kind of biofermentation reaction kettle of the anti-compaction adjusted equipped with temperature |
| CN109406241A (en) * | 2018-12-20 | 2019-03-01 | 防灾科技学院 | A kind of water-soluble gas standard experimental solutions manufacturing system of definite value trace |
| CN209476025U (en) * | 2018-12-20 | 2019-10-11 | 防灾科技学院 | It is a kind of to determine gas liquid dispensing device |
| CN110229354A (en) * | 2019-06-24 | 2019-09-13 | 中国科学院宁波材料技术与工程研究所 | A kind of method and system dissolving cellulose |
| CN212119605U (en) * | 2020-01-19 | 2020-12-11 | 防灾科技学院 | Manufacturing system for trace dissolved ternary mixed gas standard solution |
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