CN208340156U - The tubular circulation freezing concentrating device of the layer containing heat transfer buffer - Google Patents
The tubular circulation freezing concentrating device of the layer containing heat transfer buffer Download PDFInfo
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- CN208340156U CN208340156U CN201820624354.7U CN201820624354U CN208340156U CN 208340156 U CN208340156 U CN 208340156U CN 201820624354 U CN201820624354 U CN 201820624354U CN 208340156 U CN208340156 U CN 208340156U
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Abstract
The utility model relates to a kind of tubular circulation freezing concentrating devices of layer containing heat transfer buffer, the tubular circulation freezing concentrating device includes at least one set of freeze concentration casing, the freeze concentration casing is made of the outer tube of the inner tube of a stainless steel, a heat transfer buffer layer and a stainless steel, the heat transfer buffer layer is coated on the outer surface of tube wall of said inner tube, the outer tube sleeve is set to outside said inner tube, and there are spaces between its inner surface of tube wall and the heat transfer buffer layer；Feed liquid circulation to be concentrated is passed through in said inner tube, and cold carrier circulation is passed through the space between the inner surface of tube wall of the outer tube and the heat transfer buffer layer.The tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model can be realized fall off rate that is accurate, smoothly controlling feed liquid temperature, help to obtain good concentrated effect, and have many advantages, such as to be easy assembling, it is easy to operate, the accuracy of electric controling element is required it is lower.
Description
Technical field
The utility model belongs to the Freeze Concentration Technology field of liquid feed liquid, more particularly to a kind of layer containing heat transfer buffer
Tubular circulation freezing concentrating device.
Background technique
Freeze concentration is that the industries such as food, dietetic product and bio-pharmaceuticals are common, the liquid that operates below freezing point temperature
State material concentration technique.Compared with evaporation concentration technique, effective recovering liquid material thermal sensitivity natural aromatic flavor substance,
There is great advantage in terms of the bioactive ingredients such as protein, enzyme, polysaccharide, polyphenol, water soluble vitamin.Currently, gradual
Freeze Concentration Technology is the very popular a kind of technology in the field, because it has the advantages that clearly, device structure phase
It to simple, invests smaller, operates also easier.Gradual freeze concentration developed out tubular type, falling film type, part icing type,
The enrichment facility or equipment based on different operation mode such as rotary drum, belt, the wherein gradual freezing concentrating device of tubular circulation
It is a kind of higher condensing mode of efficiency, because ceaselessly flowing by feed liquid in tubular circulation, ice sheet surface can be eliminated very well
Concentration polarization phenomenon, and heat transfer efficiency can be improved.Tubular circulation freezing concentrating device, what inner tube circulated is to be concentrated
Feed liquid, what external tube layer circulated is cold carrier, by cold carrier provide cooling capacity gradually by inner tube flowing feed liquid cooling simultaneously
Ice crystal layer is formed, with the progressive additive of ice sheet, liquid water is reduced, and solute concentration increases, and solution is concentrated.
However, can tubular circulation freezing concentrating device obtain good concentrated effect, can key certainly closed in device
Ideal big nucleus is formed in inner wall under suitable feed velocity, while can accurately and smoothly control the rate of temperature fall of feed liquid again,
The ice crystal on inner wall is allowed to grow into ice sheet.Presently disclosed gradual tubular circulation shaft ice frozen be concentrated relevant device or method compared with
Few, the mode for controlling ice crystal growth in feed liquid mainly passes through while controlling cold carrier and the flow velocity/flow for being concentrated feed liquid,
Or the control of the rate of temperature fall of cold carrier is realized in conjunction with refrigeration system, such as: " method of controlling progressive freeze-concentration " is (open
Number 1593248 A of CN) it is that ice is controlled by flow velocity/flow of feed liquid and outer layer cooling medium in control loop pipe simultaneously
The brilliant speed of growth, but this method directly cools down to inner tube using cold carrier layer outer tube, to accomplish accurate stable
Rate of temperature fall control, to the accuracy of equipment refrigeration system, the cold carrier circulatory system and corresponding accessory and electric controling element
It is required that very high, there is also more difficulties in practical operation.
The main problem of the existing technology of the gradual freezing concentrating device of current tubular circulation is that tubular type is followed as a result,
Lack the cushioning control component to cold carrier temperature in ring freezing concentrating device outside feed liquid pipe, it is difficult to accomplish to decline feed liquid temperature
The actually active steady control of rate, especially forms the initial stage of ice-nucleus in feed liquid inside pipe wall, and feed liquid inside pipe wall temperature becomes
The accuracy of change is even more important, because it directly affects the form of initial stage formation ice crystal, and then influences whether have concentrated effect.
Utility model content
Based on this, the purpose of the utility model is to provide a kind of tubular circulation freeze concentration of layer containing heat transfer buffer dresses
It sets, can be realized fall off rate that is accurate, smoothly controlling feed liquid temperature, help to obtain good concentrated effect, and have
Have the advantages that be easy assembling, it is easy to operate, the accuracy of equipment is required it is lower.
The technical solution that the utility model is taken is as follows:
A kind of tubular circulation freezing concentrating device of the layer containing heat transfer buffer, including at least one set of freeze concentration casing, it is described
Freeze concentration casing is made of the outer tube of the inner tube of a stainless steel, a heat transfer buffer layer and a stainless steel, and the heat transfer is slow
Rush the outer surface of tube wall that layer is coated on said inner tube, the outer tube sleeve is set to outside said inner tube, and its inner surface of tube wall with it is described
There are spaces between heat transfer buffer layer；Feed liquid circulation to be concentrated is passed through in said inner tube, and cold carrier circulation is passed through the outer tube
Space between inner surface of tube wall and the heat transfer buffer layer.
In compared with the existing technology, the routine that is directly cooled down to inner tube to improve cooling capacity conduction velocity with outer tube
Means, the utility model increase heat transfer buffer layer between inner tube and outer tube, and it is slow that the heat transfer buffer layer can play heat transfer
Punching effect can avoid the rate of temperature fall of feed liquid in inner tube by cooling capacity smooth transfer that the cold carrier in outer tube provides to inner tube
It is too fast and cause local overcooling phenomenon, to prevent from generating the big out-phase dendrite of solute entrainment, therefore the tube wall of inner tube
Inner surface can form initial big nucleus, and solute entrainment be reduced in ice sheet Thickening Process, and then help to obtain good dense
Contracting effect.
The tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model as a result, can be realized to feed liquid temperature
The rate of change of degree is steady, accurately controls, to obtain ideal solution distribution coefficient and enrichment factor.In addition, just due to described
Heat transfer buffer layer can make the feed liquid in inner tube steadily cool down, therefore the temperature control by cold carrier in outer tube is only needed to set
Within the scope of temperature ± 1 DEG C, the temperature difference range is easy to accomplish in current industrialized production and controls, thus can be significantly
Ground reduces the complexity (three-stage cooling method can be used) of cost of equipment (expense of high accuracy temperature control system) and operation.
The tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model is suitable for the material to no suspended particulate
The freeze concentration of liquid is particularly suitable for easily forming the feed liquid of entrainment in freeze concentration, have be easy assembling, it is easy to operate,
The advantages that lower, is required to the accuracy of equipment.
Further, the heat transfer buffer layer with a thickness of 2~10mm.By limiting the thickness of heat transfer buffer layer suitable
In range, be conducive to the steady decline of feed liquid in inner tube.
And two inner tube strings of any two groups of freeze concentration casings further, including two groups or three groups of freeze concentration casings,
Connection is in parallel, two outer tube serial or parallel connections of any two groups of freeze concentration casings.According to practical situation, the freeze concentration set
There are many combination connecting modes between pipe, to match different concentration production efficiency requirements.
Further, altogether include two groups of freeze concentration casings, further include feed liquid bucket, feed liquid circulation pump, cold carrier circulation pipe,
Cold carrier first circulation pump；Two groups of freeze concentration casings be vertically to ground setting, the feed liquid bucket be located at described two groups it is cold
Freeze the top of concentration casing；
Two inner tubes series connection in two groups of freeze concentration casings, the upper end are connected with each other by pipeline, and lower end passes through pipe
Road is connected with each other, and the pipeline between two upper end of inner tube is equipped with liquor inlet, and the pipeline between lower end goes out equipped with feed liquid
Mouthful；The feed liquid bucket is connect with the liquor inlet, and the feed liquid circulation pump is located on the pipeline between two upper end of inner tube；
The circulation loop of the two inner tubes composition feed liquid circulation；
Two outer tubes in two groups of freeze concentration casings are in parallel, and the upper end is connected with each other by pipeline, and lower end passes through pipe
Road is connected with each other, and the pipeline between the upper end of two outer tube is exported equipped with cold carrier, and the pipeline between lower end is equipped with cold
Carrier import；The cold carrier import is exported with cold carrier and is connect by the cold carrier circulation pipe, and the cold carrier first follows
Ring pump is located on the cold carrier circulation pipe；Two outer tube is recycled back to cold carrier circulation pipe composition cold carrier circulation
Road.
By the way that feed liquid bucket to be located to the top of two groups of freeze concentration casings, can be filled using feed liquid self gravity
It infuses in inner tube, reduces equipment energy consumption.By the series connection of two inner tubes and the parallel connection of two outer tubes, it can guarantee the conduction effect of cooling capacity
Rate, while meeting concentration production efficiency requirement.
It further, further include batch box, refrigeration system and cold carrier second circulation pump；The batch box is located at described two
Above group freeze concentration casing, and the pipeline between two upper end of inner tube is connect；
The cold carrier circulation pipe includes the first branch pipe being arranged in parallel and the second branch pipe and upper main pipe and lower trunk
After one end of pipe, one end of first branch pipe and second branch pipe is converged, pass through the upper main pipe and the cold carrier
Outlet connection, forms；After the other end of the other end of first branch pipe and second branch pipe converges, pass through the lower trunk
Pipe is connect with the cold carrier import；
The cold carrier first circulation pump is located on first branch pipe, and the refrigeration system and the cold carrier second follow
Ring pump is respectively provided on second branch pipe, and the feed inlet of cold carrier second circulation pump is connect with the refrigeration system,
Its discharge port is connect with the lower main pipe.
By the way that the batch box is arranged, on the one hand whether there can be feed liquid to be spilled over to metering according to inner tube before freeze concentration
Bucket, judges whether the feed liquid in inner tube is full of, on the other hand can be during freeze concentration, according to the outer flash of batch box collection
Liquid product converses the ice layer thickness of inner tube formation, thus it can be seen that the concentration situation of feed liquid.The refrigeration system is that freezing is dense
Compression process provides cooling capacity in time.The cold carrier second circulation pump is cold carrier successively in two outer tube, upper main pipe, second
Offer power is circulated between branch pipe and lower main pipe.
It further, further include cold carrier equalized temperature case, the cold carrier equalized temperature case is located at the lower main pipe
On, it is internally provided with multilayer baffle.The cold carrier equalized temperature case can make respectively from the first branch pipe and the second branch pipe not
Synthermal cold carrier is quick inside it, is sufficiently mixed.
It further, further include operation control panel, inner tube temperature probe, cold carrier temp probe and solenoid valve；It is described
Operation control panel is electrically connected with the cold carrier temp probe, the solenoid valve and the cold carrier second circulation pump respectively；
Said inner tube temp probe is located in the pipeline between the lower end of two inner tube；The cold carrier temp probe be located at it is described under
In main pipe, and between the cold carrier import and the cold carrier equalized temperature case；The solenoid valve is located at described
On two branch pipes, and it is located at the discharge outlet of cold carrier second circulation pump.
By setting operation control panel and each sensor, it can be improved the degree of automation of device, facilitate operation, favorably
It is effectively monitored and controlled in the Process operating parameters in freeze concentration.
It further, further include turbine flowmeter, the turbine flowmeter is located at the pipeline between two inner tube lower end
On, for detecting the flow velocity of feed liquid.
Further, the feed liquid circulation pump is impeller pump, and the flow velocity not less than 3m/s can be provided for feed liquid.
Further, the both ends of the freeze concentration casing are respectively equipped with a union valve, are convenient for assembly and disassembly.
In order to better understand and implement, according to the present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model；
Fig. 2 is the structural schematic diagram of two groups of freeze concentration casings；
Fig. 3 is the schematic diagram in A-A direction of Fig. 2；
Fig. 4 is the gas-chromatography ion stream comparison diagram of cranberry juice concentrate and original juice of red bayberry in embodiment 3；Wherein, upper figure
For the gas-chromatography ion flow graph of the original juice of red bayberry before concentration, the following figure is the gas-chromatography ion of the cranberry juice concentrate after concentration
Flow graph.
Specific embodiment
Embodiment 1: the tubular circulation freezing concentrating device of the layer containing heat transfer buffer
Referring to Fig. 1, it shows for the structure of the tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model
It is intended to, the arrow of vertical direction indicates the flow direction of feed liquid in figure, and the arrow of horizontal direction indicates the flow direction of cold carrier.
The tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model include two groups of freeze concentration casings 1,
Feed liquid bucket 2, batch box 3, cold carrier circulation pipe 4, refrigeration system 5, cold carrier equalized temperature case 6, operation control panel 7, feed liquid
It is circulating pump 8, cold carrier first circulation pump 91, cold carrier second circulation pump 92, inner tube temperature probe 13, turbine flowmeter 14, cold
Bed temperature probe 40 and solenoid valve 41.
Two groups of freeze concentration casings 1 are vertically to ground setting.The feed liquid bucket 2 and the batch box 3 are respectively provided at
The top of two groups of freeze concentration casings 1.
As shown in Figures 1 to 3, the freeze concentration casing 1 is by 12 groups of an inner tube 10, a heat transfer buffer layer 11 and an outer tube
At, the heat transfer buffer layer 11 is coated on the outer surface of tube wall of said inner tube 10, and the outer tube 12 is sheathed on outside said inner tube 10,
And there are spaces between its inner surface of tube wall and the heat transfer buffer layer 11.Feed liquid circulation to be concentrated is passed through in said inner tube 10,
Cold carrier circulation is passed through the space between the inner surface of tube wall of the outer tube 12 and the heat transfer buffer layer 11.10 He of said inner tube
The material of outer tube 12 is metal, preferably stainless steel.It is 0.2~0.8W/ (m that the heat transfer buffer layer 11, which is thermal coefficient,
K insulating moulding coating layer), with a thickness of 2~10mm, preferably 5mm.For convenient for assembly and disassembly, the freeze concentration casing 1
Both ends are respectively equipped with a union valve 15, facilitate cleaning and cleaning after freeze concentration to tube wall ice sheet.
Two inner tubes 10 series connection in two groups of freeze concentration casings 1, the upper end are connected with each other by pipeline, and lower end passes through
Pipeline is connected with each other, and the pipeline between two inner tubes, 10 upper end is equipped with liquor inlet, and the pipeline between lower end is equipped with material
Liquid outlet.The material liquid outlet is equipped with material liquid outlet valve 101.
The bottom of the feed liquid bucket 2 offers feed liquid outlet, and the feed liquid outlet is by being equipped with feed liquid dump valve 201
Pipeline connect with the liquor inlet.The feed liquid circulation pump 8 is located on the pipeline between two inner tubes, 10 upper end.It is described
Two inner tubes 10 form the circulation loop of feed liquid circulation, and the feed liquid to be concentrated in the feed liquid bucket 2 relies on self gravity, by described
Liquor inlet between 10 upper end of feed liquid outlet and two inner tubes of 2 bottom of feed liquid bucket is flowed into two inner tube 10 and is recycled, institute
It states feed liquid circulation pump 8 and provides power for feed liquid circulation flowing, specifically select impeller pump, can provide for feed liquid not less than 3m/s
Flow velocity.
The batch box 3 is connected by the pipeline between an overflow pipe and two inner tube 10, on the overflow pipe
Equipped with feed liquid overflow valve 30.
Two outer tube 12 in two groups of freeze concentration casings 1 is in parallel, connects after in parallel with the cold carrier circulation pipe 4.
The upper end of two outer tube 12 is connected with each other by pipeline, and lower end is connected with each other by pipeline, and the upper end of two outer tube 12
Between pipeline exported equipped with cold carrier, the pipeline between lower end is equipped with cold carrier import.
As further preferred, the upper end of two outer tube 12 connects with the two of them interface of a tee pipe fitting a respectively
It connects, one interface of residue of the tee pipe fitting a is the cold carrier outlet；The lower end of two outer tube 12 respectively with one
The two of them interface of tee pipe fitting b connects, and one interface of residue of the tee pipe fitting b is the cold carrier import.
The cold carrier import is connect with cold carrier outlet by the cold carrier circulation pipe 4, and the cold carrier first follows
Ring pump 91 is located on the cold carrier circulation pipe 4.Two outer tube 12 and the cold carrier circulation pipe 4 composition cold carrier circulation
Circulation loop, the cold carrier first circulation pump 91 circulates for cold carrier provides power.
Specifically, the cold carrier circulation pipe 4 includes the first branch pipe 42 being arranged in parallel and the second branch pipe 43 and upper master
After one end of main pipe 44 and lower main pipe 45, one end of first branch pipe 42 and second branch pipe 43 is converged, by described
Upper main pipe 44 is connected with cold carrier outlet；The other end of the other end of first branch pipe 42 and second branch pipe 43
After converging, it is connect by the lower main pipe 45 with the cold carrier import.
The cold carrier first circulation pump 91 is located on first branch pipe 42, is cold carrier successively in two outer tube
12, offer power is circulated between upper main pipe 44, the first branch pipe 42 and lower main pipe 45.
The refrigeration system 5 and cold carrier second circulation pump 92 are respectively provided on second branch pipe 43, and described
The feed inlet of cold carrier second circulation pump 92 is connect with the refrigeration system 5, and discharge port is connect with the lower main pipe 45.Institute
Stating refrigeration system 5 includes cold carrier tank, refrigeration compressor and heat exchanger, is equipped with cold carrier tank temperature degree in the cold carrier tank and visits
Head, the cold carrier tank temp probe are used to detect the temperature of the cold carrier in the cold carrier tank；The heat exchanger difference
It is connect with the cold carrier tank and heat exchanger, specifically: the cold carrier in the cold carrier tank is passed through the heat exchanger
In heat medium passage, the low-temperature refrigerant that the refrigeration compressor generates is passed through the refrigerant passage in the heat exchanger, for heat
Cold carrier in matchmaker channel provides cooling capacity.The refrigeration system 5 is used to generate the cold carrier of low temperature and is stored at described cold
In carrier tank, then the cold carrier of low temperature is passed through in second branch pipe 43.
The cold carrier second circulation pump 92 is cold carrier successively in two outer tube 12, upper main pipe 44, the second branch pipe
Offer power is circulated between 43 and lower main pipe 45.
The cold carrier equalized temperature case 6 is located on the lower main pipe 45, is internally provided with multilayer baffle.From described
The cold carrier of the higher cold carrier of temperature of first branch pipe 42 and the low temperature from the second branch pipe 43 inputs the cold carrier temperature
In tandem-driving bogie 6, by the way that turbulent flow can be formed when multilayer baffle in case, realize quickly, be sufficiently mixed, gained cold carrier after mixing
Temperature is uniform, then is passed through in two outer tube 12 through the cold carrier import.
Said inner tube temp probe 13 is located in the pipeline between two inner tubes, 10 lower end, for detecting the temperature of feed liquid
Degree.
The turbine flowmeter 14 is located on the pipeline between two inner tubes, 10 lower end, for detecting the flow velocity of feed liquid.
The cold carrier temp probe 40 is located in the lower main pipe 45, and be located at the cold carrier import with it is described cold
Between bed temperature tandem-driving bogie 6, it is discharged out of cold carrier equalized temperature case 6 for detecting, the cold loads of two outer tubes 12 will be inputted
The temperature of body.
The solenoid valve 41 is located on second branch pipe 43, and is located at the discharge port of cold carrier second circulation pump 92
Locate, the whether downward main pipe 45 of the second branch pipe 43 described in open and close control inputs cold carrier.
The operation control panel 7 pumps 91, cold carrier second with feed liquid circulation pump 8, cold carrier first circulation respectively
Circulating pump 92, inner tube temperature probe 13, turbine flowmeter 14, cold carrier temp probe 40, cold carrier tank temp probe and electromagnetism
Valve 41 is electrically connected.
The operation control panel 7 is provided with operating parameter management degree, can be set by the operation control panel 7 cold
Carrier tank temperature, temperature balance control box temperature degree, feed liquid temperature range and rate of pumping range of each pump etc..The operation control
The temperature that panel 7 processed can be fed back respectively according to inner tube temperature probe 13, cold carrier temp probe 40 and cold carrier tank temp probe
Parameter, and the flow parameter fed back according to turbine flowmeter 14 control the feed liquid circulation pump 8 respectively, cold carrier first follows
The working condition of the equipment such as the refrigeration compressor in ring pump 91, cold carrier second circulation pump 92, solenoid valve 41 and refrigeration system 5,
In the range of so that actual cold carrier tank temperature degree, temperature balance control box temperature degree is reached respectively setting, thus in freeze concentration mistake
It realizes that the temperature to cold carrier in the temperature of feed liquid in two inner tubes 10, two outer tubes 12 controls in journey, makes to expect in two inner tubes 10
In the range of the temperature of liquid reaches its setting, the freeze concentration to feed liquid is realized.
The quantity of freeze concentration casing described in the utility model is unrestricted, and the tubular circulation freezing concentrating device can
Freeze concentration casing including one group, two groups, three groups or more quantity, the connection type between the freeze concentration casing
It is unrestricted.
Preferably, the tubular circulation freezing concentrating device includes two groups or three groups of freeze concentration casings, and any two groups
Two inner tube serial or parallel connections of freeze concentration casing, two outer tube serial or parallel connections of any two groups of freeze concentration casings.Series connection is
Refer to that liquid is successively successively passed through in each pipeline, parallel connection refers to after separating liquid respectively while being passed through in each pipeline.
In addition to the present embodiment, according to actual production requirement, the quantity and connection type of the freeze concentration casing have
Multiple combinations scheme, such as: altogether include two groups of freeze concentration casings, after two inner tube therein is in parallel with a feed liquid circulation pipe string
Connection, the circulation loop of two inner tube and the composition feed liquid circulation of feed liquid circulation pipe, and recycled after the parallel connection of two outer tubes with a cold carrier
Pipe series connection, the circulation loop of two outer tube and the composition cold carrier circulation of cold carrier circulation pipe；For another example: altogether including that two groups of freezings are dense
Heat-Shrinkable Tubings are connected after two inner tube therein is in parallel with a feed liquid circulation pipe, and two inner tube and the feed liquid circulation pipe form feed liquid
The circulation loop of circulation, and two outer tubes connect and to form closed circuit, which is the circulation loop of cold carrier circulation；Again
Such as: altogether including three groups of freeze concentration casings, three inner tube therein connects to form closed circuit, which is feed liquid circulation
Circulation loop, and connect after the parallel connection of three outer tubes with a cold carrier circulation pipe, three outer tube and cold carrier circulation pipe composition are cold
The circulation loop of carrier circulation；Or: altogether include three groups of freeze concentration casings, is followed after three inner tubes parallel connection shape therein with a feed liquid
Endless tube series connection, the circulation loop of three inner tube and feed liquid circulation pipe composition feed liquid circulation, and three outer tubes connect to form closure
Circuit, the closed circuit are the circulation loop, etc. of cold carrier circulation.
Embodiment 2: freezing and concentrating method
The operation of freeze concentration is carried out using the tubular circulation freezing concentrating device of the layer containing heat transfer buffer of the utility model
Method is as follows:
S1: the freezing point and undercooling point of feed liquid to be concentrated are measured.
S2: powering on, and the temperature range of first stage is arranged using operation control panel 7, i.e., in setting refrigeration system 5
The temperature range of cold carrier tank and the temperature range of cold carrier equalized temperature case 6.And it will using feed liquid bucket 2 and feed liquid circulation pump 8
Fresh water pump carries out multiple wash cycles into two inner tubes 10, to two inner tubes 10, then empties the ponding in two inner tubes 10, turns off
Material liquid outlet valve 101 opens feed liquid overflow valve 30.
S3: being added feed liquid to be concentrated in feed liquid bucket 2, opens feed liquid dump valve 201, the feed liquid to be concentrated in feed liquid bucket 2
Enter in two inner tubes 10 by self gravity, when there is feed liquid to be spilled over in batch box 3 by overflow pipe, shows feed liquid
Full of two inner tubes 10, feed liquid overflow valve 30 and feed liquid dump valve 201 are turned off, pays attention to the pipeline between feed liquid bucket 2 and inner tube 10
Do not remain bubble as far as possible inside.
S4: opening refrigeration system 5, starting cold carrier first circulation pump 91, make cold carrier successively two outer tubes 12 in parallel,
It is circulated between upper main pipe 44, the first branch pipe 42 and lower main pipe 45, while starting feed liquid circulation pump 8, make feed liquid two
It is circulated in inner tube 10, into the first stage of freeze concentration.
The flow velocity that feed liquid is detected using turbine flowmeter 14 passes through the flow velocity of 8 adjustment feed liquid of feed liquid circulation pump.If cold carrier
Temp probe 40 detect cold carrier temperature within the scope of the set temperature of cold carrier equalized temperature case 6, then solenoid valve 41 with it is cold
Carrier second circulation pump 92 simultaneously closes off；If the cold carrier temperature detected with cold carrier temp probe 40 is in cold carrier equalized temperature
Except the set temperature range of case 6, then solenoid valve 41 is opened simultaneously with cold carrier second circulation pump 92, makes cold carrier successively simultaneously
It is circulated between two outer tubes 12, upper main pipe 44, the second branch pipe 43 and the lower main pipe 45 joined.
S5: when the cold carrier temperature (i.e. the actual temperature of cold carrier in two outer tubes 12) that cold carrier temp probe 40 detects reaches
When to feed liquid freezing point, feed liquid overflow valve 30 is opened, the temperature range of setting second stage is lowered using operation control panel 7, i.e.,
The temperature range of cold carrier tank and the temperature range of cold carrier equalized temperature case 6 in setting refrigeration system 5 are lowered, it is dense into freezing
The second stage of contracting.
S6: the excessive material liquid volume collected in close observation batch box 3 is scaled table in the tube wall of each inner tube 10
The ice layer thickness in face.When the ice layer thickness of the inner surface of tube wall of each inner tube 10 reaches 2mm, operation control panel is continued to use
7 lower the temperature range of setting phase III, that is, lower the temperature range and cold carrier temperature of cold carrier tank in setting refrigeration system 5
The temperature range for spending tandem-driving bogie 6, into the phase III of freeze concentration.
Specifically, the temperature upper limit of cold carrier tank and lower limit value can divide on the basis of second stage in refrigeration system 5
It repeatedly lowers, lower modulation is 4 DEG C every time；The temperature upper limit and lower limit value of cold carrier equalized temperature case 6 can be in second stage
On the basis of lower several times, lower modulation is 4 DEG C every time.
S7: continue the excessive material liquid volume collected in close observation batch box 3, be scaled the tube wall of each inner tube 10
The ice layer thickness of inner surface can be evaluated whether the concentration situation of feed liquid, a small amount of feed liquid can also be taken directly to measure from material liquid outlet valve 101
Its concentration value.
S8: when the feed liquid in two inner tubes 10 reaches aimed concn, can terminate freeze concentration, close feed liquid circulation pump 8, beat
Sawing sheet liquid outlet valve 101 is discharged and collects the concentrated mother liquor in two inner tubes 10, is then shut off refrigeration system 5.
S9: using operation control panel 7 reset cold carrier equalized temperature case 6 temperature upper limit and lower limit value it is high
In 0 DEG C, the cold carrier in two outer tubes 12 is continued cycling through, the temperature that control is passed through the cold carrier of two outer tube 12 is greater than 0 DEG C, makes
Ice sheet on the inner surface of tube wall of two inner tubes 10 thaws and falls off, and then dismantles the union valve 15 on two groups of freeze concentration casings 1,
Ice sheet is further taken out, using tepidarium to ice sheet quick-thawing outside device.It is right after having re-assemblied two groups of freeze concentration casings 1
The freeze concentration operation of next group feed liquid is cleaned or carried out to two inner tubes 10.
Specifically, in each stage of freeze concentration, the temperature difference range of the set temperature of cold carrier tank is in refrigeration system 5
± 1 DEG C, the temperature difference range of the set temperature of cold carrier equalized temperature case 6 is ± 2 DEG C；Meanwhile cold carrier equalized temperature case 6 is set
The lower limit value for determining temperature is equal to the upper limit value of the set temperature of cold carrier tank in refrigeration system 5.In the first stage of freeze concentration,
The upper limit value of the set temperature of cold carrier tank will be lower than 2 DEG C of feed liquid freezing point in refrigeration system 5, and subsequent per stage gradually reduces 4 DEG C.
The set temperature in per stage adjusts foundation are as follows: the first stage makes the inner surface of tube wall of inner tube 10 start to generate ice crystal；
The ice sheet that second stage forms the inner surface of tube wall of inner tube 10 is thickened to 2mm；Phase III makes the inner surface of tube wall of inner tube 10
The ice sheet of formation continues to thicken to about 5mm.
Embodiment 3: the freeze concentration application to clarification type original juice of red bayberry
The tubular circulation freezing concentrating device and method for concentration of the layer containing heat transfer buffer of the utility model are applied to clear
The freeze concentration of the food feed liquid of clear bright no suspended particulate specifically carries out freeze concentration to clarification type original juice of red bayberry.
The weight of clarification type original juice of red bayberry to be concentrated is 7.5kg, and initial soluble solid content is 8.9%, freezing point
It is -2.0 DEG C, undercooling point is -3.2 DEG C.The concrete technology operating parameter of freeze concentration is as shown in table 1.
The Process operating parameters of 1 original juice of red bayberry freeze concentration setting stepwise of table
The freeze concentration first stage is that cranberry juice temperature is down to close to its freezing point temperature, and in the tube wall of inner tube in table 1
Surface starts to generate the stage of ice crystal；Freeze concentration second stage gradually forms ice in the inner surface of tube wall of inner tube for cranberry juice
Layer, and ice sheet thickens the stage of 2mm；The freeze concentration phase III be cranberry juice the inner surface of tube wall of inner tube continue to thicken to
The stage of about 5mm (reach concentration requirement, 19.2%) after this stage, collects the cranberry juice concentrate in inner tube.
It is 5.3h that the present embodiment, which carries out freeze concentration total time-consuming to 7.5kg clarification type original juice of red bayberry,.Specific freeze concentration
The results are shown in Table 2.
2 original juice of red bayberry freeze concentration effect of table is compared with being concentrated preceding stoste
For fruit juice, the variation of its fragrant flavor of concentration front and back is the important indicator of concentrated effect, utilizes gas
The cranberry juice concentrate to the original juice of red bayberry before concentration and after concentration carries out inner mark method ration to phase chromatograph-mass spectrometer respectively
Analysis, as shown in figure 4, analysis the result shows that: the cranberry juice concentrate after concentration is compared with the original juice of red bayberry before concentration, aromatic substance
Matter total loss rate is only 5.12%, and there was no significant difference.
Embodiment 4: the freeze concentration application to clarification type apple vinegar
The tubular circulation freezing concentrating device and method for concentration of the layer containing heat transfer buffer of the utility model are applied to clear
The freeze concentration of the food feed liquid of clear bright no suspended particulate specifically carries out freeze concentration to apple vinegar.
The weight of clarification type apple vinegar to be concentrated be 7.5kg, initial soluble solid content be 5.0%, freezing point be-
3.0 DEG C, undercooling point is -4.4 DEG C.The concrete technology operating parameter of freeze concentration is as shown in table 3.
The Process operating parameters of 3 apple vinegar freeze concentration setting stepwise of table
The freeze concentration first stage is that apple vinegar temperature is down to close to its freezing point temperature, and in the tube wall of inner tube in table 3
Surface starts to generate the stage of ice crystal；Freeze concentration second stage gradually forms ice in the inner surface of tube wall of inner tube for apple vinegar
Layer, and ice sheet thickens the stage of 2mm；The freeze concentration phase III be apple vinegar the inner surface of tube wall of inner tube continue to thicken to
The stage of about 5mm (reach concentration requirement, 19.2%) after this stage, collects the apple vinegar concentrate in inner tube.
It is 7.0h that the present embodiment, which carries out freeze concentration total time-consuming to 7.5kg clarification type apple vinegar,.Specific freeze concentration knot
Fruit is as shown in table 4.
4 apple vinegar freeze concentration effect of table is compared with being concentrated preceding stoste
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.
Claims (10)
1. a kind of tubular circulation freezing concentrating device of layer containing heat transfer buffer, it is characterised in that: including at least one set of freeze concentration
Casing, the freeze concentration casing are made of the outer tube of the inner tube of a stainless steel, a heat transfer buffer layer and a stainless steel, institute
The outer surface of tube wall that heat transfer buffer layer is coated on said inner tube is stated, the outer tube sleeve is set to outside said inner tube, and table in its tube wall
There are spaces between face and the heat transfer buffer layer；Feed liquid circulation to be concentrated is passed through in said inner tube, and cold carrier circulation is passed through institute
State the space between the inner surface of tube wall of outer tube and the heat transfer buffer layer.
2. the tubular circulation freezing concentrating device of the layer according to claim 1 containing heat transfer buffer, it is characterised in that: the biography
Heat buffered layer with a thickness of 2~10mm.
3. according to claim 1 or the tubular circulation freezing concentrating device of 2 described in any item layers containing heat transfer buffer, feature exist
In: including two groups or three groups of freeze concentration casings, and two inner tube serial or parallel connections of any two groups of freeze concentration casings, any two
Two outer tube serial or parallel connections of group freeze concentration casing.
4. the tubular circulation freezing concentrating device of the layer according to claim 3 containing heat transfer buffer, it is characterised in that: include altogether
Two groups of freeze concentration casings further include feed liquid bucket, feed liquid circulation pump, cold carrier circulation pipe, cold carrier first circulation pump；Described two
Group freeze concentration casing is vertically to ground setting, and the feed liquid bucket is located at the top of two groups of freeze concentration casings；
Two inner tubes series connection in two groups of freeze concentration casings, the upper end are connected with each other by pipeline, and lower end passes through pipeline phase
It connects, and the pipeline between two upper end of inner tube is equipped with liquor inlet, the pipeline between lower end is equipped with material liquid outlet；Institute
It states feed liquid bucket to connect with the liquor inlet, the feed liquid circulation pump is located on the pipeline between two upper end of inner tube；It is described
Two inner tubes form the circulation loop of feed liquid circulation；
Two outer tubes in two groups of freeze concentration casings are in parallel, and the upper end is connected with each other by pipeline, and lower end passes through pipeline phase
It connects, and the pipeline between the upper end of two outer tube is exported equipped with cold carrier, the pipeline between lower end is equipped with cold carrier
Import；The cold carrier import is exported with cold carrier and is connect by the cold carrier circulation pipe, the cold carrier first circulation pump
It is located on the cold carrier circulation pipe；The circulation loop of two outer tube and cold carrier circulation pipe composition cold carrier circulation.
5. the tubular circulation freezing concentrating device of the layer according to claim 4 containing heat transfer buffer, it is characterised in that: further include
Batch box, refrigeration system and cold carrier second circulation pump；The batch box is located above two groups of freeze concentrations casing, and with
Pipeline connection between two upper end of inner tube；
The cold carrier circulation pipe includes the first branch pipe being arranged in parallel and the second branch pipe and upper main pipe and lower main pipe,
After one end of first branch pipe and one end of second branch pipe are converged, exported by the upper main pipe and the cold carrier
Connection is formed；After the other end of the other end of first branch pipe and second branch pipe converges, by the lower main pipe with
The cold carrier import connection；
The cold carrier first circulation pump is located on first branch pipe, the refrigeration system and cold carrier second circulation pump
It is respectively provided on second branch pipe, and the feed inlet of cold carrier second circulation pump is connect with the refrigeration system, is gone out
Material mouth is connect with the lower main pipe.
6. the tubular circulation freezing concentrating device of the layer according to claim 5 containing heat transfer buffer, it is characterised in that: further include
Cold carrier equalized temperature case, the cold carrier equalized temperature case are located on the lower main pipe, are internally provided with multilayer baffle.
7. the tubular circulation freezing concentrating device of the layer according to claim 6 containing heat transfer buffer, it is characterised in that: further include
Operate control panel, inner tube temperature probe, cold carrier temp probe and solenoid valve；The operation control panel respectively with it is described cold
Bed temperature probe, the solenoid valve and cold carrier second circulation pump electrical connection；Said inner tube temp probe is located at described
In pipeline between the lower end of two inner tubes；The cold carrier temp probe is located in the lower main pipe, and is located at the cold load
Between body import and the cold carrier equalized temperature case；The solenoid valve is located on second branch pipe, and is located at the cold load
The discharge outlet of body second circulation pump.
8. the tubular circulation freezing concentrating device of the layer according to claim 3 containing heat transfer buffer, it is characterised in that: further include
Turbine flowmeter, the turbine flowmeter are located on the pipeline between two inner tube lower end.
9. the tubular circulation freezing concentrating device of the layer according to claim 3 containing heat transfer buffer, it is characterised in that: the material
Liquid circulating pump is impeller pump.
10. the tubular circulation freezing concentrating device of the layer according to claim 1 containing heat transfer buffer, it is characterised in that: described
The both ends of freeze concentration casing are respectively equipped with a union valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820624354.7U CN208340156U (en) | 2018-04-27 | 2018-04-27 | The tubular circulation freezing concentrating device of the layer containing heat transfer buffer |
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| CN201820624354.7U CN208340156U (en) | 2018-04-27 | 2018-04-27 | The tubular circulation freezing concentrating device of the layer containing heat transfer buffer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108283824A (en) * | 2018-04-27 | 2018-07-17 | 韶关学院 | The tubular circulation freezing concentrating device and its freezing and concentrating method of the layer containing heat transfer buffer |
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2018
- 2018-04-27 CN CN201820624354.7U patent/CN208340156U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108283824A (en) * | 2018-04-27 | 2018-07-17 | 韶关学院 | The tubular circulation freezing concentrating device and its freezing and concentrating method of the layer containing heat transfer buffer |
| CN108283824B (en) * | 2018-04-27 | 2023-10-20 | 韶关学院 | Tube-type circulating freeze concentration device containing heat transfer buffer layer and freeze concentration method thereof |
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