CN208785799U - Tower bottom heat of evaporation source system is concentrated in krypton xenon - Google Patents
Tower bottom heat of evaporation source system is concentrated in krypton xenon Download PDFInfo
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- CN208785799U CN208785799U CN201721743406.4U CN201721743406U CN208785799U CN 208785799 U CN208785799 U CN 208785799U CN 201721743406 U CN201721743406 U CN 201721743406U CN 208785799 U CN208785799 U CN 208785799U
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- tower bottom
- nitrogen
- evaporator
- electric heater
- krypton xenon
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Abstract
A kind of krypton xenon concentration tower bottom heat of evaporation source system, krypton xenon concentration tower bottom is mounted on including one and is immersed in liquid oxygen and liquid krypton xenon mixture, the tower bottom evaporator being made of coil exchanger, it is employed nitrogen as in the coil pipe of the tower bottom evaporator as heat transferring medium, the nitrogen of air drying enters in electric heater by regulating valve, after electric heater is heated to set temperature, the nitrogen of the tower bottom evaporator returns to outlet and is provided with low-temperature sensor and is connected on the low temperature alarm of peripheral hardware, the low temperature alarm connects regulating valve, and the control valve opening when being lower than 0 DEG C, so that returning to Nitrogen pipe network when nitrogen goes out evaporator for room temperature, reduce the release of nitrogen.
Description
Technical field
The utility model relates to the krypton xenon concentration tower vapo(u)rization systems in a kind of rare gas krypton xenon extraction process, belong to
Cryogenic rectification technical field.
Background technique
Currently, the extraction of krypton xenon-133 gas is all to utilize krypton xenon component different from the boiling point of remaining component, multiple rectifying is taken
Method, krypton-xenon concentrate is extracted from oxygen.Oxygen (0.2%Kr+Xe) containing krypton xenon component is concentrated into krypton xenon
Condenser is arranged in tower, concentration tower top, and evaporator, oxygen rectifying in tower is arranged in bottom, and high-purity oxygen evaporation is arranged from tower top
Out, krypton xenon accumulates in tower bottom and is discharged outside tower as 99%Kr+Xe concentrate as product.
Krypton xenon concentration tower bottom evaporator uses two ways at present, a kind of to use built-in electric heater pattern, and one kind is adopted
With gas heater pattern.Using the evaporator of electric heater pattern, heat of evaporation Load Regulation is more flexible, but the disadvantage is that electricity adds
Heat pipe is easy bad, is mounted in tower and replaces more difficult, and heat medium is liquid oxygen, and the inside is in addition to krypton xenon ingredient, also containing big
Hydrocarbon is measured, there is a certain security risk.Using the evaporator of gas heater pattern, Reliability comparotive is high, still
The adjusting of thermic load is mainly by the flow of regulating gas, and regulating effect is poor, and degree of regulation is not also high.
Summary of the invention
The purpose of the utility model is to overcome the shortcomings of the prior art, and provide a kind of compact-sized, adjusting side
Formula is flexible, and degree of regulation is high, safe and reliable, installation, maintenance and replacement advantageously krypton xenon concentration tower vapo(u)rization system.
The purpose of this utility model is completed by following technical solution, a kind of krypton xenon concentration tower bottom heat of evaporation source
System, including one be mounted on krypton xenon concentration tower bottom and be immersed in it is in liquid oxygen and liquid krypton xenon mixture, by coil exchanger
The tower bottom evaporator of composition employs nitrogen as heat transferring medium, the nitrogen of air drying in the coil pipe of the tower bottom evaporator
Entered in electric heater by regulating valve, after electric heater is heated to set temperature, into tower bottom evaporator in make heat
Source returns to Nitrogen pipe network after tower bottom evaporator out；The thermic load of the tower bottom evaporator is by adjusting the flow of nitrogen and going out
The temperature of electric heater is realized.
As preferred: the heat exchanger tube in the tower bottom evaporator is divided into four layers, is respectively wound around central tube outer layer；It is described
Electric heater is configured with the power regulating cabinet of adjustable electric heater capacity；The nitrogen return outlet of the tower bottom evaporator is provided with low
Temperature sensor and the low temperature alarm for being connected on peripheral hardware, the low temperature alarm connects regulating valve, and adjusts when being lower than 0 DEG C
Valve opening reduces the release of nitrogen so that returning to Nitrogen pipe network when nitrogen goes out evaporator for room temperature.
As preferred: tower bottom evaporator is immersed in the liquid oxygen and liquid krypton xenon mixture of krypton xenon concentration tower bottom, and in krypton
Low liquid level warning interlocking gear is arranged in the tower bottom of xenon concentration tower, and the low liquid level warning interlocking gear and electric heater are chain, and
For liquid level lower than design minimum alarm, liquid level is lower than directly chain closing electric heater when linkage value, prevents bottom liquid mistake
Dry combustion method caused by few；The electric heater outlet is provided with temperature interlocking mechanism, prevents the nitrogen temperature entered in tower bottom evaporator
Height is spent, the operational safety of electric heater is protected.
The utility model mainly passes through electric heating by tower bottom evaporator, electric heater and regulating valve system three parts, nitrogen
Device is heated to certain temperature, enters back into tower bottom evaporator and exchanges heat；In this vapo(u)rization system, it can be steamed by adjusting to enter
The nitrogen flow of device is sent out to adjust thermic load, the temperature of electric heater can also be gone out by adjusting nitrogen to adjust thermic load.
Nitrogen makees heat source with nitrogen at room, increases the temperature difference, reduce heat exchange area by making heat source after heating；Nitrogen
Adjustable temperature range after heating is big and degree of regulation is high, and the regulative mode than passing contracting is more flexible；Nitrogen is changed by gas coil pipe
Hot device transmits heat, and it is more reliable to install electric heater in tower bottom than directly.
The regulating valve system includes regulating valve and bottom liquid thermometer, goes out vaporizer nitrogen thermometer composition；Pass through
The nitrogen amount into tower bottom evaporator is adjusted to adjust the thermic load of evaporator.
The utility model can solve the not high disadvantage of gas heater degree of regulation, by the power regulating cabinet of electric heater,
It can be adjusted with 0 ~ 100% power, degree of regulation can reach within ± 1 DEG C, and adjusting line linearly can very well, can be more advantageous
In actual operation.
The utility model has compact-sized, and regulative mode is flexible, and degree of regulation is high, safe and reliable, installation, maintenance
And replace the features such as more convenient.
Detailed description of the invention
Fig. 1 is the structure principle chart of system described in the utility model.
Label in figure specifically includes that V2801: regulating valve；EH2801: electric heater；K2801: evaporator；C2801:
Krypton xenon concentration tower, LT2801: evaporator liquidometer；TE2801: nitrogen goes out outlet temperature of electric heater meter；TE2803: evaporator
Bottom liquid temperature；TE2804: nitrogen goes out evaporator outlet temperature；TC2802: electric heater temperature controller；UZ2802: electric heating
Start-stop logic.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing: shown in Fig. 1, a kind of krypton described in the utility model
Tower bottom heat of evaporation source system is concentrated in xenon, including one is mounted on krypton xenon concentration tower bottom and is immersed in liquid oxygen and liquid krypton xenon mixture
In, in the coil pipe of tower bottom evaporator K2801, the tower bottom evaporator K2801 that is made of coil exchanger using nitrogen
Gas is as heat transferring medium, and the nitrogen of air drying enters in electric heater EH2801 by regulating valve V2801, by electric heating
After device is heated to set temperature, into tower bottom evaporator K2801 in make heat source, return to Nitrogen pipe network after tower bottom evaporator out；Institute
The thermic load of tower bottom evaporator K2801 is stated by adjusting the flow of nitrogen and out the temperature of electric heater EH2801 is realized.
As shown in the figure, the heat exchanger tube in tower bottom evaporator K2801 described in the utility model is divided into four layers, is respectively wound around
Central tube outer layer；The electric heater EH2801 is configured with the power regulating cabinet of adjustable electric heater capacity；The tower bottom evaporator
The nitrogen of K2801 returns to outlet and is provided with low-temperature sensor and is connected on the low temperature alarm of peripheral hardware, the low temperature alarm
Regulating valve V2801 is connected, and adjusts V2801 valve opening when being lower than 0 DEG C, so that returning to nitrogen when nitrogen goes out evaporator for room temperature
Pipe network reduces the release of nitrogen.
Tower bottom evaporator K2801 described in the utility model is immersed in liquid oxygen and the mixing of liquid krypton xenon of krypton xenon concentration tower bottom
In object, and low liquid level warning interlocking gear LIAS2801, the low liquid level warning interlocking gear are set in the tower bottom of krypton xenon concentration tower
LIAS2801 and electric heater EH2801 are chain, and in liquid level lower than design minimum alarm, liquid level is lower than straight when linkage value
Lock closes electric heater EH2801 in succession, dry combustion method caused by preventing bottom liquid very few；The outlet electric heater EH2801 is set
It is equipped with temperature interlocking mechanism TIAS2801, prevents the nitrogen temperature entered in tower bottom evaporator K2801 excessively high, protects electric heater
The operational safety of EH2801.
Embodiment: nitrogen enters in electric heater EH2801 by regulating valve V2801, is heated to set by electric heater
After determining 100 DEG C of temperature, into tower bottom evaporator K2801 in make heat source, return to Nitrogen pipe network after tower bottom evaporator out.Evaporator
The temperature TI2801 of the flow of the adjustable nitrogen of thermic load and out electric heater is realized；Nitrogen return pipe net temperature should be 0
DEG C or more, it is realized by adjusting the flow of V2801 adjusting nitrogen.
Tower bottom evaporator K2801 uses coil exchanger, and heat exchanger tube is divided into four layers, is respectively wound around central tube outer layer,
Heat transferring medium in coil pipe uses nitrogen, and heat exchange coil is immersed in liquid oxygen and liquid krypton xenon mixture.The thermic load Q of evaporator=
KA △ t, load of heat are mainly influenced by three heat transfer coefficient, heat transfer area, heat transfer temperature difference aspects.Pass through regulating valve
V2801 adjusts the nitrogen flow for entering evaporator, increases nitrogen flow, improves nitrogen flow rate, can increase on the inside of evaporator
Heat transfer coefficient k, under conditions of the temperature difference and certain heat exchange area, thus it is possible to vary the thermic load of evaporator.In nitrogen flow flow velocity
In the case where certain, by adjusting electric heater EH2801 power regulating cabinet, the power of adjustable electric heater, to reach change
Nitrogen goes out the temperature TI2801 of electric heater.Nitrogen is improved into after the temperature of evaporator, the full conjunction temperature TI2803 of liquid is constant,
Heat transfer temperature difference can be increased in this way to change the thermic load of evaporator.
It is gas at normal temperature into the nitrogen in evaporator when general krypton xenon concentration tower bottom evaporator uses gas heater,
Cooling by the liquid of tower bottom, generally low-temperature condition, this part cryogenic gas can not generally recycle cooling capacity, need when evaporator out
Release causes waste to atmosphere.In the utility model is high-temperature gas into the nitrogen in evaporator, and evaporator is arranged out
Temperature TIA2804, can be set low-temperature warning, V2801 valve opening be adjusted when being lower than 0 DEG C, so that nitrogen goes out evaporator Shi Weichang
Temperature returns to Nitrogen pipe network, reduces the release of nitrogen.
The chain LIAS2801 of low liquid level warning is arranged in tower bottom, chain with electric heater, when liquid level is lower than design minimum
Alarm, liquid level are lower than directly chain closing electric heater when linkage value, dry combustion method caused by preventing bottom liquid very few.Electric heater
Outlet setting temperature interlocks TIAS2801, the nitrogen temperature entered in evaporator can be prevented excessively high, and protect electric heating
The operational safety of EH2801.
The utility model can solve the not high disadvantage of gas heater degree of regulation, by the power regulating cabinet of electric heater,
It can be adjusted with 0 ~ 100% power, degree of regulation can reach within ± 1 DEG C, and adjusting line linearly can very well, can be more advantageous
In actual operation；The structure type and regulative mode of the utility model are flexible, degree of regulation is high, and electric heater is independently placed on
Outside ice chest, more securely and reliably, installation and maintenance replacement are all more convenient.
Claims (2)
1. a kind of krypton xenon is concentrated tower bottom heat of evaporation source system, including one be mounted on krypton xenon concentration tower bottom and be immersed in liquid oxygen and
Tower bottom evaporator (K2801) in liquid krypton xenon mixture, being made of coil exchanger, the tower bottom evaporator
(K2801) employed nitrogen as in coil pipe as heat transferring medium, the nitrogen of air drying by regulating valve (V2801) enter electricity plus
In hot device (EH2801), it is characterised in that the heat exchanger tube in the tower bottom evaporator (K2801) is divided into four layers, is respectively wound around
Central tube outer layer；The electric heater (EH2801) is configured with the power regulating cabinet of adjustable electric heater capacity；The tower bottom evaporation
The nitrogen of device (K2801) returns to outlet and is provided with low-temperature sensor and is connected on the low temperature alarm of peripheral hardware, the low temperature report
Alert device connection regulating valve (V2801), and regulating valve (V2801) aperture when being lower than 0 DEG C, so that nitrogen is room temperature when going out evaporator
Nitrogen pipe network is returned, the release of nitrogen is reduced.
2. tower bottom heat of evaporation source system is concentrated in krypton xenon according to claim 1, it is characterised in that tower bottom evaporator
(K2801) it is immersed in the liquid oxygen and liquid krypton xenon mixture of krypton xenon concentration tower bottom, and low in the setting of the tower bottom of krypton xenon concentration tower
Liquid level warning interlocking gear (LIAS2801), the low liquid level warning interlocking gear (LIAS2801) and electric heater (EH2801) are even
Lock, and in liquid level lower than design minimum alarm, liquid level is lower than direct chain closing electric heater (EH2801) when linkage value,
Dry combustion method caused by preventing bottom liquid very few；Electric heater (EH2801) outlet is provided with temperature interlocking mechanism
(TIAS2801), it prevents the nitrogen temperature entered in tower bottom evaporator (K2801) excessively high, protects the fortune of electric heater (EH2801)
Row safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721743406.4U CN208785799U (en) | 2017-12-14 | 2017-12-14 | Tower bottom heat of evaporation source system is concentrated in krypton xenon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721743406.4U CN208785799U (en) | 2017-12-14 | 2017-12-14 | Tower bottom heat of evaporation source system is concentrated in krypton xenon |
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| Publication Number | Publication Date |
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| CN208785799U true CN208785799U (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031138A (en) * | 2017-12-14 | 2018-05-15 | 浙江新锐空分设备有限公司 | A kind of krypton xenon concentration tower bottom heat of evaporation source system |
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2017
- 2017-12-14 CN CN201721743406.4U patent/CN208785799U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031138A (en) * | 2017-12-14 | 2018-05-15 | 浙江新锐空分设备有限公司 | A kind of krypton xenon concentration tower bottom heat of evaporation source system |
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