CN110131913A - A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system - Google Patents
A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system Download PDFInfo
- Publication number
- CN110131913A CN110131913A CN201910473846.XA CN201910473846A CN110131913A CN 110131913 A CN110131913 A CN 110131913A CN 201910473846 A CN201910473846 A CN 201910473846A CN 110131913 A CN110131913 A CN 110131913A
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- thermocouple
- workpiece
- supercritical carbon
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0009—Monitoring the pressure in an enclosure or kiln zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0018—Monitoring the temperature of the atmosphere of the kiln
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0056—Regulation involving cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0068—Regulation involving a measured inflow of a particular gas in the enclosure
Abstract
The invention discloses a kind of supercritical carbon dioxide cryogenic treating process and its devices and gas reclaiming system, the cryogenic treatment apparatus include deep cooling furnace and it is several the jet pipe between workpiece is protruded into furnace and is evenly arranged on from outside furnace, several jet pipes are connected to total inlet pipe；Further include: the first thermocouple, first pressure gauge and the first flowmeter being set in total inlet pipe；It is correspondingly arranged in the second thermocouple of the center of workpiece and the third thermocouple of surface location；The second pressure gauge and second flowmeter being set in the exhaust pipe in deep cooling furnace roof portion；And it is set to the third pressure gauge and the 4th thermocouple of deep cooling furnace interior workspace.Using the supercritical carbon dioxide cryogenic treating process of apparatus of the present invention, by the initial temperature, pressure and the flow that adjust supercritical carbon dioxide, to adjust the cooling rate of workpiece, the controllable cooling for realizing workpiece, ensure that stability, uniformity, accuracy and sensitivity of the workpiece when carrying out deep cooling.
Description
Technical field
The present invention relates to subzero treatment technical field more particularly to a kind of supercritical carbon dioxide cryogenic treating process and its
Device and gas reclaiming system.
Background technique
Subzero treatment is a supplement process of common heat treatment, and wearability, the size that can be effectively improved material are steady
The mechanical performances such as qualitative, intensity and toughness prolong the service life so as to improve the quality of product, final to reduce production
Cost.This process of subzero treatment is added in domestic some big small enterprises on the production line of oneself one after another in recent years, meanwhile, it is deep
Liquid nitrogen used in cold-treating process is more easier acquisition and the reduction of liquid nitrogen cost, also promotes the extensive of subzero treatment technology
Using.
Existing cryogenics obtain low temperature environment using its decalescence using liquid nitrogen as cold source, or directly will
Workpiece is put into liquid nitrogen the immersion for carrying out certain time, the service life of Lai Tigao workpiece and its mechanical property.This subzero treatment
There are the problem of mainly cause the precision of energy waste, workpiece not high enough, be easy to open workpiece when subzero treatment in liquid nitrogen
It splits and deforms, increase the internal stress of workpiece.Control is not sufficiently stable, is accurate, is sensitive, is quick during deep cooling.It is not easy with work
The variation of part shape, size adjusts deep freeze refrigeration plant and parameter mode.
And existing subzero treatment mode is that directly liquid gas is passed through in stove, not to workpiece deep cooling process
Detect and control system, be easy to cause that the inhomogeneous cooling of workpiece is even, cooling rate is unable to control in this way, to workpiece formation cause compared with
Big influence.
Therefore, develop that a kind of control response is fast, control deep cooling furnace control device with high accuracy is very necessary.
Summary of the invention
The present invention is to solve the above problem in the prior art, propose a kind of supercritical carbon dioxide cryogenic treating process and
Its device and gas reclaiming system.
To achieve the above object, the invention adopts the following technical scheme:
The first aspect of the invention is to provide a kind of supercritical carbon dioxide cryogenic treatment apparatus, if including deep cooling furnace and
Dry that the jet pipe between workpiece is protruded into furnace and be evenly arranged on from outside furnace, several jet pipes are connected to total inlet pipe；Also wrap
It includes:
The first thermocouple, first pressure gauge and the first flowmeter being set in the total inlet pipe one by one；
It is arranged in a one-to-one correspondence the third thermocouple of the second thermocouple and surface location in the center of the workpiece；
The second pressure gauge and second flowmeter being set in the exhaust pipe in deep cooling furnace roof portion one by one；And
It is set to the third pressure gauge and the 4th thermocouple of deep cooling furnace interior workspace one by one；
Wherein, each thermocouple, pressure gauge and flowmeter are separately connected data acquistion and control system, the acquisition and control
Temperature, pressure and the gas flow data that system is monitored according to each thermocouple, pressure gauge and flowmeter, adjust the depth
The flow and pressure of carbon dioxide in black furnace, to control the speed of deep cooling process and the temperature of workpiece.
Further, on the supercritical carbon dioxide cryogenic treatment apparatus, the deep cooling furnace includes:
One furnace body with front door and back door；
At least one is set to the exhaust pipe at the top of the furnace body；
At least one is set to the safety valve at the top of the furnace body；And
One is set in the furnace body for fixing and moving the material rack component of the workpiece；
Wherein, the material rack component by material frame, charging tray and is set to the roller-way of the bottom of furnace body and forms from top to bottom, institute
The workspace that material frame is located in the deep cooling furnace is stated, and is slidably set on the roller-way by the charging tray.
Further, on the supercritical carbon dioxide cryogenic treatment apparatus, the exhaust pipe includes being arranged symmetrically
Downtake pipe and second exhaust pipe；And the safety valve includes the first row air valve and second row air valve being arranged symmetrically.
Further, on the supercritical carbon dioxide cryogenic treatment apparatus, several jet pipes are fixed on institute
On the back door for stating deep cooling furnace, and successively embarks on journey and be arranged side by side.
It is further preferred that on the supercritical carbon dioxide cryogenic treatment apparatus, further includes:
Several isocons being connected to respectively with jet pipe described in every row along its length, the isocon and the jet stream
Pipe is arranged vertically；With
One branch pipe being connected to respectively with the middle part of several isocons along its length, the middle part of the branch pipe and institute
State total inlet pipe vertical connection.
Further, on the supercritical carbon dioxide cryogenic treatment apparatus, the jet pipe is towards the workpiece
Side wall on offer several jet holes along its length, and several jet hole equidistant interval distributions.
The second aspect of the invention is to provide a kind of supercritical carbon dioxide cryogenic treating process of described device, including
Following steps:
Step 1, cryogenic gas is successively directly injected to the workpiece through total inlet pipe, branch pipe, isocon and jet pipe
Surface cools down to the workpiece；
Step 2, by the first thermocouple, first pressure gauge, first flowmeter, the second thermocouple, third thermocouple, the second pressure
Power table, second flowmeter, third pressure gauge and the 4th thermocouple acquire the temperature, pressure and gas flow number at each position respectively
According to, and send the connection data acquistion and control system to；
Step 3, the connection data acquistion and control system open or close according to the collected data the exhaust pipe and/
Or safety valve, the flow of jet pipe and jet hole is adjusted, is in setting state to control the temperature and pressure of workpiece.
Further, in the supercritical carbon dioxide cryogenic treating process, in which:
In step 1, in temperature-fall period, by the first thermocouple, first pressure gauge, first flowmeter, second pressure gauge and
Second flowmeter detects pressure at the total inlet pipe and the exhaust pipe and uninterrupted to adjust cooling speed when deep cooling
Rate；And by each thermocouple temperature level detected, gas at total inlet pipe described in auxiliary adjustment and the exhaust pipe
Pressure and flow；
In step 3, in the constant temperature stage, by the 4th thermocouple and third pressure gauge detect in-furnace temperature and pressure size come
Gas pressure at the total inlet pipe and the exhaust pipe, temperature, uninterrupted are controlled, to maintain the pressure and temperature in furnace
Stabilization, and temperature level at the workpiece is detected by the second thermocouple, third thermocouple.
Further, in the supercritical carbon dioxide cryogenic treating process, in step 2 through the exhaust pipe and/
Or the gas of safety valve discharge, it is recycled again by heat exchanger, compressor.
The third aspect of the invention is to provide a kind of gas based on the supercritical carbon dioxide cryogenic treatment apparatus
Reclaiming system, including pass through the sequentially connected cryogenic treatment apparatus of pipeline, rotary compressor, condenser, dioxide bottle, liquid
LPG cylinder heat exchanger, supercritical carbon dioxide pump and vacuum tank；Wherein:
The cryogenic treatment apparatus carries out subzero treatment, and the gas in treatment process to workpiece using supercritical carbon dioxide
Body carbon dioxide through at the top of it exhaust pipe and/or safety valve be discharged；
The rotary compressor and condenser to the carbon dioxide gas of discharge for carrying out compressing and liquefying processing, after liquefaction
Carbon dioxide liquid be sent into the liquid gas storage tank；
The inlet of the liquid gas storage tank is connected with the condenser and dioxide bottle by pipeline through filter respectively
It connects, receives and come from the condenser carbon dioxide liquid, while being and dioxide bottle make-up gas；
The supercritical carbon dioxide pump connects the liquid gas storage tank through the heat exchanger by pipeline, is used for the liquid
Carbon dioxide liquid in LPG cylinder, which is vaporized and adjusted after temperature and pressure rises to setting supercriticality, is sent into the vacuum tank
It is interior；And
The vacuum tank is connect by pipeline with the total inlet pipe of the cryogenic treatment apparatus, is mentioned for the deep cooling furnace apparatus
For stable supercritical carbon dioxide, injects the cryogenic treatment apparatus and workpiece is handled.
Further, in the gas reclaiming system, low temperature is provided between the vacuum tank and the heat exchanger
Coolant recirculation pump.
Further, in the gas reclaiming system, between the vacuum tank and supercritical carbon dioxide pump
Pipeline on be provided with safety valve.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
(1) cryogenic treating process of the invention, in such a way that carbon dioxide is as cold source, the advantage of this carbon dioxide exists
In rate of heat exchange is fast, and deep cooling is high-efficient, and cooling rate is controllable；There is biggish cooling extent, Er Qiechao in swelling heat absorption
The price of critical carbon dioxide is low compared with nitrogen；
(2) cryogenic treatment apparatus of the invention is respectively arranged thermocouple, pressure gauge, flowmeter in total inlet pipe mouth,
To control the size into gas temperature, pressure and flow in deep cooling furnace；It is disposed with thermocouple and pressure gauge in deep cooling furnace,
For monitoring the temperature level of furnace pressure and temperature and workpiece, the speed and temperature of deep cooling are controlled；It is arranged in exhaust pipe mouth
There are pressure gauge and flowmeter, to control the speed of discharge furnace gas, to maintain the pressure size in furnace；
(3) cryogenic treatment apparatus of the invention, in the workspace of deep cooling furnace, different phase takes different control value modes,
Temperature-fall period according to workspace temperature and pressure come the size of the temperature and pressure of air inlet pipe and flow, and according to exhaust pipe
Uninterrupted carrys out aids in temperature control；Into after the constant temperature stage, controlled according to the temperature and pressure signal of deep cooling furnace, and according into
Temperature and pressure at escape pipe carrys out comprehensive temperature control；Gas is controlled by real time temperature, pressure and set temperature, the deviation of pressure
Input and output amount, to realize the accurate control to workpiece temperature in deep cooling furnace；
(4) cooling rate of workpiece subzero treatment process is controllable, by adjust supercritical carbon dioxide initial temperature,
Pressure and flow adjust the cooling rate of workpiece, realize the controllable cooling of workpiece；
(5) deep cooling medium can be recycled and is recycled, and substantially reduce cost, and subzero treatment process and subzero treatment terminate
The carbon dioxide gas recycled afterwards by compressor carry out compression condensation after, using air exhauster be transported in carbon dioxide gas tank into
Row storage uses；
(6) subzero treatment is carried out to workpiece using cryogenic treatment apparatus provided by the invention, has can guarantee that workpiece is carrying out
Stability, uniformity, accuracy and sensitivity when deep cooling.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of supercritical carbon dioxide cryogenic treatment apparatus of the present invention；
Fig. 2 is the structural representation of total inlet pipe and jet pipe in a kind of supercritical carbon dioxide cryogenic treatment apparatus of the present invention
Figure；
Fig. 3 is the structural schematic diagram of jet pipe and workpiece in a kind of supercritical carbon dioxide cryogenic treatment apparatus of the present invention；
Fig. 4 is the structural schematic diagram in a kind of supercritical carbon dioxide subzero treatment gas reclaiming system of the present invention；
Wherein, each appended drawing reference are as follows:
In cryogenic treatment apparatus: 1- jet pipe, 2- isocon, the first thermocouple of 3-, 4- first pressure gauge, the total air inlet of 5-
Pipe, 6- first flowmeter, the second thermocouple of 7-, 8- third thermocouple, the back door 9-, the first safety valve of 10-, 11- exhaust pipe, 12-
Exhaust pipe, 13- second pressure gauge, 14- second flowmeter, the second safety valve of 15-, 16- workpiece, 17- expect frame, 18- third pressure
Table, the 4th thermocouple of 19-, the front door 20-, 21- charging tray, 22- roller-way；23- jet hole, 24- branch pipe；And
In subzero treatment gas reclaiming system: 25- dioxide bottle, the 4th pressure gauge of 26-, the first charge valve of 27-,
The first on-off valve of 28-, 29- filter, 30- liquid gas storage tank, the 5th pressure gauge of 31-, the 5th thermocouple of 32-, 33- second are inflated
Valve, 34- heat exchanger, 35- supercritical carbon dioxide pump, 36- low-temperature cooling fluid circulating pump, 37- third safety valve, 38- vacuum tank,
The 6th thermocouple of 39-, 40- third charge valve, 41- reset valve, 42- ball valve, the first solenoid valve of 43-, the 4th charge valve of 44-, 45-
Cryogenic treatment apparatus, 46 second solenoid valves, 47- rotary compressor, 48 condensers, 49- aspiration pump, the second on-off valve of 50-, 51-
Data acquistion and control system.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
Embodiment 1
As shown in fig.1, the present embodiment provides a kind of supercritical carbon dioxide cryogenic treatment apparatus, if including deep cooling furnace and
Dry that the jet pipe 1 between workpiece 16 is protruded into furnace and be evenly arranged on from outside furnace, several jet pipes 1 are connected to total inlet pipe 5,
According to the requirement of processing workpiece, the jet pipe of replaceable difference size model number.
As shown in fig.1, the supercritical carbon dioxide cryogenic treatment apparatus further includes being set to the total inlet pipe 5 one by one
Interior the first thermocouple 3, first pressure gauge 4 and first flowmeter 6.Thermocouple 3 is inserted in total inlet pipe 5, for monitor always into
The temperature of gas in tracheae 5.First pressure gauge 4 is connected on total inlet pipe 5, for measuring the pressure of gas in total inlet pipe 5.Always
First flowmeter 6 is connected in air inlet pipe 5, for monitoring the uninterrupted of gas in total inlet pipe 5.
As shown in fig.1, the supercritical carbon dioxide cryogenic treatment apparatus further includes being arranged in a one-to-one correspondence in the workpiece
Second thermocouple 7 of 16 center and the third thermocouple 8 of surface location；It is plugged respectively on the center of workpiece 16 and surface
The second thermocouple 7 and third thermocouple 8 be respectively used to the variation of monitoring workpiece center and surface temperature.
As shown in fig.1, the supercritical carbon dioxide cryogenic treatment apparatus further includes being set to the deep cooling furnace roof one by one
Second pressure gauge 13 and second flowmeter 14 in the exhaust pipe in portion；The second pressure gauge 13 plugged on exhaust pipe 11 is for detecting
The flowmeter 2 14 that pressure and exhaust pipe 11 when gas is discharged in 11 position of exhaust pipe plug is for detecting 11 position of exhaust pipe
Uninterrupted when gas is discharged.
With continued reference to shown in Fig. 1, which further includes being set to the deep cooling one by one
The third pressure gauge 18 and the 4th thermocouple 19 of furnace interior workspace.The third pressure gauge 18 plugged in the deep cooling furnace is for examining
Survey the pressure of workspace gas in furnace.The 4th thermocouple 19 plugged in deep cooling furnace is used to detect the temperature of workspace gas in furnace
Degree.
As shown in fig.1, in the present embodiment, as an optimal technical scheme, the deep cooling furnace include: one have before
The furnace body of door 20 and back door 9；At least one is set to the exhaust pipe at the top of the furnace body；At least one is set at the top of the furnace body
Safety valve；And one be set in the furnace body for fixing and moving the material rack component of the workpiece 16；Wherein, the material frame
Component by material frame 17, charging tray 21 and is set to the roller-way 22 of the bottom of furnace body and forms from top to bottom, and the material frame 17 is located at institute
The workspace in deep cooling furnace is stated, and is slidably set on the roller-way 22 by the charging tray 21.Workspace is arranged in furnace
Material frame 17 is used to fix workpiece 16, and the gas for preventing jet pipe 1 from spraying shifts workpiece 16.When carrying out subzero treatment, by workpiece
16 and material frame 17 be placed on 21 on charging tray, charging tray 21 is pushed into designated position in furnace along roller-way 22 via front door 20.
As shown in fig.1, in the present embodiment, as an optimal technical scheme, the exhaust pipe includes being arranged symmetrically
Downtake pipe 11 and second exhaust pipe 12, furnace gas is discharged according to furnace gas air inflow size in time, forms following for gas
Circulation is dynamic, guarantees the foundation of operating temperature and pressure in furnace；And the safety valve includes the first row air valve 10 being arranged symmetrically
It with second row air valve 15, is sharply increased for pressure, when reaching the critical value of setting, quick air releasing decompression guarantees stove safety.
Refering to shown in Fig. 2 and Fig. 3, in the present embodiment, as an optimal technical scheme, several jet pipes 1 are solid
Due on the back door 9 of the deep cooling furnace, and successively embark on journey and be arranged side by side, several jet pipes 1 be evenly arranged in workpiece 16 it
Between.And the jet pipe 1 is antipriming pipe made of metal one by one, on side wall of the jet pipe 1 towards the workpiece 16
Several jet holes 23 are offered along its length, can directly be cooled down to workpiece 16, subzero treatment, and several jet streams
The distribution of 23 equidistant interval of hole.When ventilating deep cooling, jet pipe deep 1 enters into workpiece, carries out two-sided cooling to workpiece, is conducive to work
16 uniform decrease in temperature of part.
Refering to shown in Fig. 2 and Fig. 3, in the present embodiment, as an optimal technical scheme, the supercritical carbon dioxide is deep
Cold treatment device, further includes: several isocons 2 being connected to respectively with jet pipe 1 described in every row along its length, the shunting
Pipe 2 is arranged vertically with the jet pipe 1；The branch being connected to respectively with the middle part of several isocons 2 along its length with one
Pipe 24, the middle part of the branch pipe 24 and 5 vertical connection of total inlet pipe.By total inlet pipe 5, branch pipe 24,2 and of several isocons
Several jet pipes 1 constitute the fluid conveying fluidic system of the supercritical carbon dioxide cryogenic treatment apparatus.
Supercritical carbon dioxide cryogenic treatment apparatus proposed by the present invention, the side using supercritical carbon dioxide as cold source
Formula；The advantage of supercritical carbon dioxide is that rate of heat exchange is fast, and deep cooling is high-efficient；Cooling homogeneous deformation is small；It can be according to work
Part requires controllably to cool down by realization of process parameters such as temperature, pressure and the flows of adjusting deep cooling agent；Supercritical carbon dioxide can
With most of recycling, comparing liguefied nitrogen, cost is relatively low；Thermocouple, pressure are respectively arranged when subzero treatment in total inlet pipe
Table, flowmeter realize the controllable cooling of workpiece to control the size into gas temperature, pressure and flow in deep cooling furnace.Energy
The stability and uniformity of workpiece performance after guarantee subzero treatment.
Embodiment 2
Supercritical carbon dioxide cryogenic treatment apparatus described in 1 based on the above embodiment, the present embodiment provides described in one kind
The supercritical carbon dioxide cryogenic treating process of device, deep cooling medium used by the cryogenic treating process are overcritical titanium dioxide
Carbon, supercritical carbon dioxide have the density and thermal conductivity higher than liquid nitrogen, help to improve the rate of subzero treatment.It is described super to face
Boundary's carbon dioxide refers to that state of the gas in total inlet pipe, isocon and jet pipe is supercriticality, projects from jet stream sky
Gas is non-supercritical state, and the temperature and pressure of deep cooling furnace is not always in above-critical state.At the supercritical carbon dioxide deep cooling
The principle of reason device is that the gas of jet pipe injection is become non-supercritical state from above-critical state to inhale a large amount of heat, to make work
Part generates deep cooling.
The supercritical carbon dioxide cryogenic treating process, it is controllable in the cooling rate of workpiece subzero treatment process, it is main logical
The initial temperature, pressure and flow for overregulating supercritical carbon dioxide, adjust the cooling rate of workpiece, realize the controllable of workpiece
It is cooling.Specifically comprise the following steps: refering to shown in Fig. 2
Step 1, cryogenic gas is successively directly injected to the work through total inlet pipe 5, branch pipe 24, isocon 2 and jet pipe 1
The surface of part 16 cools down to the workpiece 16；
Step 2, by the first thermocouple 3, first pressure gauge 4, first flowmeter 6, the second thermocouple 7, third thermocouple 8,
Second pressure gauge 13, second flowmeter 14, third pressure gauge 18 and the 4th thermocouple 19 acquire the temperature at each position, pressure respectively
And gas flow data, and send the connection data acquistion and control system to；
Step 3, the connection data acquistion and control system open or close according to the collected data the exhaust pipe and/
Or safety valve, the flow of jet pipe and jet hole is adjusted, is in setting state to control the temperature and pressure of workpiece 16.
In the present embodiment, in step 1, in temperature-fall period, pass through the first thermocouple 3, first pressure gauge 4, first flow
Meter 6, second pressure gauge 13 and second flowmeter 14 detect pressure and uninterrupted at the total inlet pipe 5 and the exhaust pipe
To adjust rate of temperature fall when deep cooling；And by each thermocouple temperature level detected, total air inlet described in auxiliary adjustment
Gas pressure and flow at pipe 5 and the exhaust pipe；In step 3, in the constant temperature stage, pass through the 4th thermocouple 19 and third pressure
Table 18 detects in-furnace temperature and pressure size to control gas pressure at the total inlet pipe 5 and the exhaust pipe, temperature, stream
Size is measured, to maintain the stabilization of the pressure and temperature in furnace, and by the second thermocouple 7, third thermocouple 8 to the workpiece 16
Place's temperature level is detected.
In the present embodiment, the gas being discharged in step 2 through the exhaust pipe and/or safety valve, using overcritical dioxy
Change carbon subzero treatment cyclic utilization system, can recirculate and utilize after the recycling such as heat exchanger, compressor.Specifically, deep cooling
The carbon dioxide gas recycled after treatment process and subzero treatment is discharged, through over-voltage from the exhaust pipe and/or safety valve
After contracting machine carries out compression condensation, it is transported in carbon dioxide gas tank using air exhauster and carries out storage use.
In the present embodiment, by using novel gas passage distributed architecture, direct cooling is passed through into furnace different from traditional
The device of gas, the pairs of close arrangement of jet pipe 1 is in workpiece two sides, and a large amount of intensive jet holes opened up on jet pipe 1
23, directly gas injection can be cooled down to workpiece surface.The distance between jet pipe 1 by convection holes on jet pipe diameter
Size and jet pipe determine at a distance from workpiece.1 one end of jet pipe is connected with isocon, a fixation being connected with isocon 2
In on deep cooling furnace back door 9.
In the present embodiment, if jet stream tube spacing is from being S, workpiece and jet pipe distance L, the pin hole sample on jet pipe is small
Pore diameter size be D (general D < 0.5mm), the relationship between jet pipe and the distance and convection holes of workpiece:
L=kD (1)
K is proportionality coefficient.
Carbon dioxide has bigger J-T coefficient, can use throttling expansion and quickly generates low temperature environment, 31 DEG C+
The supercritical gas of 10MPa, when being expanded to 0.1MPa, about T1 DEG C of Δ of cooling of the generation of J-T effect, i.e. environment temperature can arrive T1=
31-ΔT1℃。
The heat of deep cooling process carbon dioxide absorption:
31 DEG C of+10MPa-(Δ H) of Δ H1=(Δ H) (31- Δ T1) DEG C+0.1MPa (2)
Deep cooling process workpiece releases heat, if T0 DEG C of workpiece initial temperature, quality is M kg, and workpiece drops to T1 and needs to release
Heat:
Q1=M*C* (T0-T1) (3)
C is the mean specific heat of workpiece；
According to heat balance, obtaining the quality that needs are carbon dioxide is m1
M1=Q1/ Δ H1 (4)
Workpiece drops to T2 DEG C from T1, the heat of releasing:
Q2=M*C* (T1-T2) (5)
Environment temperature changes to T2 from T1, and pressure becomes 0.1MPa, the heat of deep cooling process carbon dioxide absorption from xMPa
Δ H2=(Δ H) T1+xMPa-(Δ H) T2+0.1MPa (6)
Need carbon dioxide:
M2=Q2/ Δ H2 (7)
So that workpiece is cooled to T3 needs carbon dioxide altogether
M=m1+m2 (11)
Real process heat transfer efficiency is lower than the heat transfer efficiency of theoretical calculation, if taking heat transfer efficiency k, actually required two
Carbonoxide quality:
M0=m/k (12)
By above-mentioned each formula it is found that the heat exchange between workpiece and deep cooling medium is realized by heat convection, medium
Density and thermal conductivity it is bigger, convection transfer rate is bigger.Supercritical carbon dioxide (31 DEG C, 10MPa) and same temperature and pressure
The nitrogen of power compares, and density increases by 6.4 times, and thermal conductivity increases by 2 times.Therefore, using the deep cooling of supercritical carbon dioxide coolant
Speed ratio nitrogen cooling rate will greatly improve.
Stove stationary operational phase, air inflow and gas output and in-furnace temperature variation in furnace have determining relationship.It can be with
It is determined by experiment this corresponding relationship, based on corresponding relationship in this, can be controlled respectively by passing in and out tolerance and pressure value in furnace
The Control for Kiln Temperature of deep cooling furnace temperature rise period and constant temperature stage processed.In process certification test, control system is according to the reality of instrument everywhere
The registration of survey, by compared with setup parameter, control total inlet pipe 5 and be discharged tracheae 11 and 12 pass in and out furnace gas pressure,
Temperature, the size of flow, to realize the accurate control to deep cooling furnace temperature.
Therefore, it utilizes carbon dioxide as cold source and carries out subzero treatment, have rate of heat exchange fast, deep cooling is high-efficient；Swollen
There is biggish cooling extent when swollen heat absorption；And cost is low compared with nitrogen.Meanwhile the present invention proposes new convection type and temperature
Degree, pressure, flow control methods, since the position of thermocouple, pressure gauge, flowmeter is fixed, by airflow influence very little, control system
System exports control amount according to the deviation of real time temperature and set temperature, to realize the accurate control to deep cooling furnace.It can guarantee survey
To the stability, uniformity, accuracy and sensitivity of deep cooling process.
Embodiment 3
As shown in fig.3, supercritical carbon dioxide cryogenic treatment apparatus and embodiment 2 described in 1 based on the above embodiment
The supercritical carbon dioxide cryogenic treating process, the present embodiment provides a kind of gas reclaiming systems, including by pipeline according to
Cryogenic treatment apparatus 45, rotary compressor 47, condenser 48, dioxide bottle 25,30 heat exchanger of liquid gas storage tank of secondary connection
34, supercritical carbon dioxide pump 35 and vacuum tank 38.
As shown in fig.3, in the present embodiment, the cryogenic treatment apparatus 45 using supercritical carbon dioxide to workpiece into
Row subzero treatment, and the atmospheric carbon dioxide in treatment process through at the top of it exhaust pipe and/or safety valve be discharged；The rotation
Compressor 47 and condenser 48 to the carbon dioxide gas of discharge for carrying out compressing and liquefying processing, the carbon dioxide liquid after liquefaction
Body is sent into the liquid gas storage tank 30；The inlet of the liquid gas storage tank 30 by pipeline through filter 29 respectively with the condensation
Device 48 and dioxide bottle 25 connect, and receive and come from 48 carbon dioxide liquid of condenser, while being and carbon dioxide gas
25 make-up gas of bottle；The supercritical carbon dioxide pump 35 connects the liquid gas storage tank 30 through the heat exchanger 34 by pipeline,
For the carbon dioxide liquid in the liquid gas storage tank 30 is vaporized and is adjusted temperature and pressure rise to setting supercriticality after
It is sent into the vacuum tank 38；And the vacuum tank 38 is connected by the total inlet pipe 5 of pipeline and the cryogenic treatment apparatus 45
Connect, provide stable supercritical carbon dioxide for the deep cooling furnace apparatus 45, inject the cryogenic treatment apparatus 45 to workpiece into
Row processing.
As shown in fig.3, in the present embodiment, being provided with sub-cooled between the vacuum tank 38 and the heat exchanger 34
Liquid circulating pump 36, and safety valve is provided on the pipeline between the vacuum tank 38 and supercritical carbon dioxide pump 35
27.Carbon dioxide boosting pressure stabilizing process controls its temperature by low-temperature cooling fluid circulating pump 36, safety valve 37 guarantees its safe pressure.
As shown in fig.3, the cyclic process of the supercritical carbon dioxide subzero treatment cyclic utilization system are as follows:
High-pressure carbon dioxide is flowed into liquefaction by the first charge valve 27, the first on-off valve 28, filter 29 from gas cylinder
In gas tank 30；By the second charge valve 33, heat exchanger 34, ultra supercritical carbon dioxide pump 35 by dioxy after reaching certain pressure
Change after carbon rises to supercritical pressure and flows into vacuum tank 38；Carbon dioxide boosting pressure stabilizing process is controlled by low-temperature cooling fluid circulating pump 36
Its temperature, safety valve 37 guarantee its safe pressure；Stable carbon dioxide is by third charge valve 40, reset valve 41, first-class
Meter 6, the first solenoid valve 43 handle workpiece into deep cooling furnace processing unit 45；Then the safety valve from deep cooling furnace roof portion and row
Intratracheal discharge gas, by the 4th charge valve 44, second flowmeter 14, second solenoid valve 46, into compressor 47, condenser
48 carry out compressing and liquefying discharge, enter liquid gas storage tank 30 by the filtering of filter 29 and are recycled.After deep cooling, close
First on-off valve 28, opens logical second disconnected valve 50, and the carbon dioxide in system is passed through compressor 47, condenser 48, pressurizes, is cold
But it is sent back in high pressure gas cylinder 25 after by aspiration pump 49, carries out recycling storage and utilize.Each functional unit in the gas reclaiming system
Data acquisition and control is realized by data acquistion and control system 51.
The supercritical carbon dioxide subzero treatment cyclic utilization system of the present embodiment is handled different from traditional liquid nitrogen deep
Most of nitrogen directly empties afterwards, and most of carbon dioxide can recycle.The present embodiment is using carbon dioxide low
Temperature pressurization can be by gas transition at liquid；Gas in deep cooling furnace is in low temperature, and the gas of discharge passes through compression
After machine pressurization, when pressure is more than gas-liquid critical transition temperature, transformation of the gas to liquid occurs.Subzero treatment process is from deep cooling
Carbon dioxide in the carbon dioxide and after treatment furnace for the treatment of furnace discharge can be liquefied by low temperature compression to be recycled.Deep cooling
Treatment process from subzero treatment fire grate go out carbon dioxide by second flowmeter 14, the second solenoid valve 46, compressor 47,
Condenser 48, the first on-off valve 28 and liquid gas storage tank 30, realize the recycling of gas and recycle；It is closed after subzero treatment
On-off valve 28 opens the second on-off valve 50, and the carbon dioxide in system passes through second flowmeter 14, the second solenoid valve 46,
Rotary compressor 47, condenser 48, aspiration pump 49, the second on-off valve 50 enter carbon dioxide gas tank 25, realize and recycle.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (10)
1. a kind of supercritical carbon dioxide cryogenic treatment apparatus, including deep cooling furnace and several protruded into from outside furnace in furnace and be evenly arranged on work
Jet pipe (1) between part (16), several jet pipes (1) are connected to total inlet pipe (5)；It is characterized by further comprising:
The first thermocouple (3), first pressure gauge (4) and the first flowmeter (6) being set in the total inlet pipe (5) one by one；
It is arranged in a one-to-one correspondence in the second thermocouple (7) of the center of the workpiece (16) and the third thermocouple of surface location
(8)；
The second pressure gauge (13) and second flowmeter (14) being set in the exhaust pipe in deep cooling furnace roof portion one by one；And
It is set to the third pressure gauge (18) and the 4th thermocouple (19) of deep cooling furnace interior workspace one by one；
Wherein, each thermocouple, pressure gauge and flowmeter are separately connected data acquistion and control system, the acquisition and control system
According to temperature, pressure and gas flow data that each thermocouple, pressure gauge and flowmeter monitor, the deep cooling furnace is adjusted
The flow and pressure of interior carbon dioxide, to control the speed of deep cooling process and the temperature of workpiece (16).
2. supercritical carbon dioxide cryogenic treatment apparatus according to claim 1, which is characterized in that the deep cooling furnace packet
It includes:
One furnace body with front door (20) and back door (9)；
At least one is set to the exhaust pipe at the top of the furnace body；
At least one is set to the safety valve at the top of the furnace body；And
One is set in the furnace body for fixing and moving the material rack component of the workpiece (16)；
Wherein, the material rack component is from top to bottom by material frame (17), charging tray (21) and the roller-way for being set to the bottom of furnace body
(22) it forms, the material frame (17) is located at the workspace in the deep cooling furnace, and is slidably set to by the charging tray (21)
On the roller-way (22).
3. supercritical carbon dioxide cryogenic treatment apparatus according to claim 1, which is characterized in that several jet pipes
(1) it is fixed on the back door (9) of the deep cooling furnace, and successively embarks on journey and be arranged side by side.
4. supercritical carbon dioxide cryogenic treatment apparatus according to claim 3, which is characterized in that further include:
Several isocons (2) being connected to respectively with jet pipe described in every row (1) along its length, the isocon (2) and institute
Jet pipe (1) is stated to be arranged vertically；With
One branch pipe (24) being connected to respectively with the middle part of several isocons (2) along its length, the branch pipe (24)
Middle part and the total inlet pipe (5) vertical connection.
5. supercritical carbon dioxide cryogenic treatment apparatus according to claim 1, which is characterized in that the jet pipe (1)
It is offered along its length on side wall towards the workpiece (16) several jet holes (23), and several jet holes (23)
Equidistant interval distribution.
6. a kind of supercritical carbon dioxide cryogenic treating process based on any one of claim 1-5 described device, feature exist
In including the following steps:
Step 1, cryogenic gas is successively directly injected to institute through total inlet pipe (5), branch pipe (24), isocon (2) and jet pipe (1)
The surface for stating workpiece (16) cools down to the workpiece (16)；
Step 2, by the first thermocouple (3), first pressure gauge (4), first flowmeter (6), the second thermocouple (7), third thermoelectricity
Even (8), second pressure gauge (13), second flowmeter (14), third pressure gauge (18) and the 4th thermocouple (19) acquire respectively respectively
Temperature, pressure and the gas flow data at position, and send the connection data acquistion and control system to；
Step 3, the connection data acquistion and control system opens or closes the exhaust pipe and/or peace according to the collected data
Full valve adjusts the flow of jet pipe and jet hole, is in setting state to control the temperature and pressure of workpiece (16).
7. supercritical carbon dioxide cryogenic treating process according to claim 6, which is characterized in that wherein:
In step 1, in temperature-fall period, pass through the first thermocouple (3), first pressure gauge (4), first flowmeter (6), second pressure
Table (13) and second flowmeter (14) detect pressure at the total inlet pipe (5) and the exhaust pipe and uninterrupted to adjust
Rate of temperature fall when deep cooling；And by each thermocouple temperature level detected, total inlet pipe (5) described in auxiliary adjustment and
Gas pressure and flow at the exhaust pipe；
In step 3, in the constant temperature stage, in-furnace temperature is detected by the 4th thermocouple (19) and third pressure gauge (18) and pressure is big
It is small to control gas pressure at the total inlet pipe (5) and the exhaust pipe, temperature, uninterrupted, to maintain the pressure in furnace
The stabilization of power and temperature, and temperature level at the workpiece (16) is carried out by the second thermocouple (7), third thermocouple (8)
Detection.
8. supercritical carbon dioxide cryogenic treating process according to claim 1, which is characterized in that through described in step 2
Exhaust pipe and/or the gas of safety valve discharge, recycle again by heat exchanger, compressor.
9. a kind of gas reclaiming system based on any one of the claim 1-5 supercritical carbon dioxide cryogenic treatment apparatus,
It is characterised in that it includes by the sequentially connected cryogenic treatment apparatus of pipeline (45), rotary compressor (47), condenser (48),
Dioxide bottle (25), liquid gas storage tank (30) heat exchanger (34), supercritical carbon dioxide pump (35) and vacuum tank (38)；Its
In:
The cryogenic treatment apparatus (45) carries out subzero treatment, and the gas in treatment process to workpiece using supercritical carbon dioxide
Body carbon dioxide through at the top of it exhaust pipe and/or safety valve be discharged；
The rotary compressor (47) and condenser (48) to the carbon dioxide gas of discharge for carrying out compressing and liquefying processing, liquid
Carbon dioxide liquid after change is sent into the liquid gas storage tank (30)；
The inlet of the liquid gas storage tank (30) by pipeline through filter (29) respectively with the condenser (48) and titanium dioxide
Carbon gas cylinder (25) connection receives and comes from the condenser (48) carbon dioxide liquid, while to mend with dioxide bottle (25)
Inflatable body；
The supercritical carbon dioxide pump (35) connects the liquid gas storage tank (30) through the heat exchanger (34) by pipeline, is used for
Carbon dioxide liquid in the liquid gas storage tank (30) is vaporized and is adjusted after temperature and pressure rises to setting supercriticality and is sent
Enter in the vacuum tank (38)；And
The vacuum tank (38) is connect by pipeline with the total inlet pipe (5) of the cryogenic treatment apparatus (45), is the deep cooling
Furnace apparatus (45) provides stable supercritical carbon dioxide, injects the cryogenic treatment apparatus (45) and handles workpiece.
10. gas reclaiming system according to claim 9, which is characterized in that the vacuum tank (38) and the heat exchanger
(34) be provided between low-temperature cooling fluid circulating pump (36), the vacuum tank (38) and the supercritical carbon dioxide pump (35) it
Between pipeline on be provided with safety valve (27).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473846.XA CN110131913A (en) | 2019-06-01 | 2019-06-01 | A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system |
| PCT/CN2020/093635 WO2020244473A1 (en) | 2019-06-01 | 2020-05-31 | Supercritical carbon dioxide cryogenic treatment method and device and gas recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473846.XA CN110131913A (en) | 2019-06-01 | 2019-06-01 | A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110131913A true CN110131913A (en) | 2019-08-16 |
Family
ID=67579764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910473846.XA Pending CN110131913A (en) | 2019-06-01 | 2019-06-01 | A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110131913A (en) |
| WO (1) | WO2020244473A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020244473A1 (en) * | 2019-06-01 | 2020-12-10 | 上海颐柏科技股份有限公司 | Supercritical carbon dioxide cryogenic treatment method and device and gas recycling system |
| CN113245676A (en) * | 2021-05-19 | 2021-08-13 | 太原科技大学 | Liquid nitrogen cryogenic device for arc welding based on magnetic control |
| CN114085963A (en) * | 2021-11-26 | 2022-02-25 | 临沂市金立机械有限公司 | Nitrogen-based atmosphere recycling device and method in gas quenching process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120055592A1 (en) * | 2010-02-23 | 2012-03-08 | Air Products And Chemicals, Inc. | Method of Metal Processing Using Cryogenic Cooling |
| CN103105027A (en) * | 2013-02-20 | 2013-05-15 | 中国科学院理化技术研究所 | Cryogenic treatment device with cold energy recovering device |
| CN205676511U (en) * | 2016-06-23 | 2016-11-09 | 浙江嘉兴翔阳金属材料科技有限公司 | Cryogenic treatment device |
| CN207313651U (en) * | 2017-06-30 | 2018-05-04 | 无锡凯伦纳弹簧有限公司 | A kind of spring cryogenic treatment apparatus |
| CN210107801U (en) * | 2019-06-01 | 2020-02-21 | 上海颐柏科技股份有限公司 | Supercritical carbon dioxide cryogenic treatment device and gas recycling system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3672181A (en) * | 1970-02-26 | 1972-06-27 | Lewis Tyree Jr | Method and apparatus for carbon dioxide cooling |
| US7361238B1 (en) * | 2004-06-01 | 2008-04-22 | Tempel Steel Company | Annealing furnace purging and oxidation system and method |
| CN101363074B (en) * | 2008-09-25 | 2011-07-27 | 浙江工业大学 | Conveyer belt type cryogenic treatment apparatus |
| EP2535675A1 (en) * | 2011-06-17 | 2012-12-19 | Messer France S.A.S. | Method and device for cooling products |
| US8904811B2 (en) * | 2012-11-15 | 2014-12-09 | Linde Aktiengesellschaft | Baffle controlled oscillating flow freezer |
| CN203513751U (en) * | 2013-09-29 | 2014-04-02 | 宝钢轧辊科技有限责任公司 | Double-medium cryogenic box |
| CN103834780B (en) * | 2014-03-10 | 2016-03-09 | 宜兴市永昌轧辊有限公司 | A kind of horizontal liquid nitrogen direct injection forging steel cold roll deep cold treatment apparatus |
| CN107883631A (en) * | 2017-12-12 | 2018-04-06 | 广州鲜之源生态冷链技术有限公司 | A kind of multinode temperature control device and regulation and control method |
| CN109318044A (en) * | 2018-10-29 | 2019-02-12 | 广州汇专工具有限公司 | A kind of supercritical carbon dioxide supply regulator control system |
| CN110131913A (en) * | 2019-06-01 | 2019-08-16 | 上海颐柏科技股份有限公司 | A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system |
-
2019
- 2019-06-01 CN CN201910473846.XA patent/CN110131913A/en active Pending
-
2020
- 2020-05-31 WO PCT/CN2020/093635 patent/WO2020244473A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120055592A1 (en) * | 2010-02-23 | 2012-03-08 | Air Products And Chemicals, Inc. | Method of Metal Processing Using Cryogenic Cooling |
| CN103105027A (en) * | 2013-02-20 | 2013-05-15 | 中国科学院理化技术研究所 | Cryogenic treatment device with cold energy recovering device |
| CN205676511U (en) * | 2016-06-23 | 2016-11-09 | 浙江嘉兴翔阳金属材料科技有限公司 | Cryogenic treatment device |
| CN207313651U (en) * | 2017-06-30 | 2018-05-04 | 无锡凯伦纳弹簧有限公司 | A kind of spring cryogenic treatment apparatus |
| CN210107801U (en) * | 2019-06-01 | 2020-02-21 | 上海颐柏科技股份有限公司 | Supercritical carbon dioxide cryogenic treatment device and gas recycling system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020244473A1 (en) * | 2019-06-01 | 2020-12-10 | 上海颐柏科技股份有限公司 | Supercritical carbon dioxide cryogenic treatment method and device and gas recycling system |
| CN113245676A (en) * | 2021-05-19 | 2021-08-13 | 太原科技大学 | Liquid nitrogen cryogenic device for arc welding based on magnetic control |
| CN113245676B (en) * | 2021-05-19 | 2022-10-25 | 太原科技大学 | Liquid nitrogen cryogenic device for arc welding based on magnetic control |
| CN114085963A (en) * | 2021-11-26 | 2022-02-25 | 临沂市金立机械有限公司 | Nitrogen-based atmosphere recycling device and method in gas quenching process |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020244473A1 (en) | 2020-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110131913A (en) | A kind of supercritical carbon dioxide cryogenic treating process and its device and gas reclaiming system | |
| CN104749218B (en) | Flammable gas explosion characteristic test device and method under ultralow temperature | |
| CN108870821B (en) | Low-temperature cooling equipment using refrigerator as cold source | |
| CN106896134B (en) | A kind of overcritical low temperature thermal technology Testing Platform of double media | |
| Yamaguchi et al. | Basic study on new cryogenic refrigeration using CO2 solid–gas two phase flow | |
| Guo et al. | Flow characteristics and dispersion during the leakage of high pressure CO2 from an industrial scale pipeline | |
| Tian et al. | Experimental study of accidental release behavior of high-pressurized CO2 vessel | |
| CN116699079B (en) | Ultralow-temperature gas experiment platform and working method thereof | |
| CN107703240A (en) | A kind of gas-chromatography programmed temperature sampling system and method using eddy current effect | |
| CN210107801U (en) | Supercritical carbon dioxide cryogenic treatment device and gas recycling system | |
| CN113030151B (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| CN116972340A (en) | Integrated management system and method for liquid hydrogen aircraft | |
| WO2023240859A1 (en) | Performance experiment system for closed brayton cycle | |
| CN107088442B (en) | A kind of low energy consumption ultralow temperature experimental system and method based on time device for cooling | |
| CN101536123A (en) | Method for cooling superconducting magnets | |
| Yamaguchi et al. | A novel thermally driven pump and its test in a supercritical CO2 loop system | |
| Xu et al. | Study of an integrated vortex tube used in hydrogen pre-cooling system | |
| CN109358093A (en) | A kind of fiber-wound gas cylinder infrared thermal imaging detection system and its detection method | |
| CN205676511U (en) | Cryogenic treatment device | |
| CN107677045A (en) | Interior purifier studies system | |
| CN209280620U (en) | A kind of fiber-wound gas cylinder infrared thermal imaging detection system | |
| JP4023671B2 (en) | Cooling method and cooling apparatus for X-ray crystal analysis | |
| Wang et al. | The prediction for optimum combination of high pressure and intermediate pressure on a small refrigerated cabinet with CO2 transcritical two-stage cycle | |
| CN217536081U (en) | Carbon dioxide supercritical fluid quenching device | |
| Li et al. | An experimental study on the choked flow characteristics of CO2 pipelines in various phases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |