CN205528545U - Preparation chitosan oligosaccharides's natural vibration cavitation device - Google Patents
Preparation chitosan oligosaccharides's natural vibration cavitation device Download PDFInfo
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- CN205528545U CN205528545U CN201620096552.1U CN201620096552U CN205528545U CN 205528545 U CN205528545 U CN 205528545U CN 201620096552 U CN201620096552 U CN 201620096552U CN 205528545 U CN205528545 U CN 205528545U
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Abstract
The utility model relates to a preparation chitosan oligosaccharides's natural vibration cavitation device, include the pipeline of water bath with thermostatic control circulation tank, basin, pump, natural vibration cavitation ware and transmission shell polysaccharide solution and install manometer, the valve on the pipeline, natural vibration cavitation ware is the tubular structure that has hollow portion, and along the flow direction of material, the hollow portion of natural vibration cavitation ware is first round hole section, second round hole section, third round hole section, horn mouth section and fourth round hole section respectively, first round hole section diameter D1 is 1.5~3.5 with second round hole section D2's ratio, and second round hole section D2 is 1.5~5 with third round hole section D3's ratio. Adopt the utility model discloses an at least improvement is compared more than 40% to the degradation rate with the current degradation rate that adopts hydrodynamic cavitation device ( venturi ) preparation chitosan oligosaccharides, have characteristics such as simple accurate, energy consumption are low, efficient, the advantage that has extensive industrial application.
Description
Technical field
This utility model relates to a kind of self-vibration cavitation apparatus preparing oligo-chitosan.
Background technology
The general chitosan molecule amount prepared by de-acetyl chitin is very big, and has close crystal structure, insoluble in usual vehicle, can only be dissolved in some acid medium, and this makes the application of chitosan be extremely limited.It addition, research shows: the chitosan nature difference of different relative molecular masses is very big, the most even can show diametrically opposite characteristic, and many specific function of chitosan only are reduced to the most just show at relative molecular mass.Chitosan through the low-molecular water-soluble chitosan that obtains of degraded, has uniqueness, superior physiologically active and physico-chemical property, has a wide range of applications field and Development volue, thus receive much attention.
At present, degradation of chitosan method mainly has chemical method, enzyme process and Physical.
(1) chemical method is to be degraded chitosan by the method for chemistry, mainly has: acid degradation method, NaNO2Edman degradation Edman, oxidation degradation method etc..Chemical degradative processes reacts bad control, and relative molecular mass distribution width, easily to environment, product colour is deeper.
(2) enzymic degradation is the method utilizing specificity or non-specific enzyme to degrade chitosan.The relative molecular mass of enzymatic degradation method degradation process and catabolite is easily controlled, and directly carries out under the conditions of relatively mild, it is not necessary to add other chemical reaction reagent, and environmental pollution is few.But, the enzymic degradation cycle is long, and enzyme easily inactivates, and production cost is high, is the most also difficult to industrialization.
(3) physical degradation methods is presently mainly radiation method, microwave method and supercritical ultrasonics technology.Radiation degradation utilizes radioactive ray degraded chitosan, but radiation degradation is the highest to equipment requirements, may produce poisonous and harmful substance simultaneously.Microwave method is to be degraded chitosan by microwave radiation, but microwave degradation chitosan the most still rests on intermittently operated, it is difficult to continuous prodution.Chitosan is mainly degraded by ultrasonic degradation by ultrasound cavitation effect, its Degradation is fairly obvious, the most homogeneous available low relative molecular mass chitosan, and sonication acid amount significantly reduces, last handling process is greatly simplified, and the pollution to environment is greatly reduced.But, owing to, in total power consumption of ultrasonic cavitation, only 5%-10% is used for cavitation effect, and remaining 90%-95% makes system heat up with the form of heat energy.This intensification not only causes the waste of energy, is unfavorable for the process to heat-sensitive materials (the most biological, medical etc. industry) simultaneously；Another serious problems of ultrasonic cavitation, are its directivity and locality.Cavitation effect only occurs near ultrasonic generator very in zonule, does not occur bulk migration to move due to cavity, and the formation of cavity, develop and crumble and fall process, is confined within this finite region, thus,The problems such as it is relatively low that ultrasonic cavitation exists capacity usage ratio, and cavitation effect region is little, owing to sonication chitosan yield is the lowest, cause production cost too high, it is difficult to industrial applications.
The Chinese invention patent of Patent No. ZL2010101787923 is being applied for and obtained to present applicant not long ago, this patent is to utilize equipment of Hydrodynamic Cavitation (Venturi tube) to prepare oligo-chitosan, but in follow-up R&D process, it is found by the applicant that: Hydrodynamic cavitation degraded is crumbled and fall by cavitation bubble and is being produced localized hyperthermia and high pressure about, and with strong shock wave and microjet occur, these physical conditions are that in solution, degradation of chitosan provides a favourable physicochemical environment, achieve and pass through free-radical oxidation, high temperature pyrolysis and supercritical water oxidation make chitosan molecule generation Degradation.But cavitation bubble is crumbled and fall rapidly, can not crumble and fall again after fully growing up, it is difficult to realize the efficient utilization of energy.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of self-vibration cavitation apparatus preparing oligo-chitosan, utilizes this device to be degraded chitosan by chitosan solution self-vibration cavitation effect own, have simple and easy to do, energy consumption is low, efficiency high；There is the advantage of large-scale industrial application.
The technical scheme solving above-mentioned technical problem is: a kind of self-vibration cavitation apparatus preparing oligo-chitosan, including water bath with thermostatic control cyclic water tank, basin, pump, self-vibration cavitation device and the pipeline of conveying chitosan solution and the Pressure gauge being arranged on pipeline, valve, described pump is connected with basin, self-vibration cavitation device respectively by pipeline, and self-vibration cavitation device is connected with basin by pipeline.
Described self-vibration cavitation device is the tubular structure with hollow space, flow direction along material, the hollow space of self-vibration cavitation device is respectively the first circular hole portion, the second circular hole portion, the 3rd circular hole portion, oared segrne pii and the 4th circular hole portion, the ratio of described first circular hole portion diameter D1 and the second circular hole portion D2 is 1.5～3.5, and the ratio of the second circular hole portion D2 and the 3rd circular hole portion D3 is 1.5～5.
A kind of self-vibration cavitation apparatus preparing oligo-chitosan of this utility model provides the benefit that: utilize this device to dissolve the chitosan solution made self-vibration cavitation effect own in solvent by being added by high molecular weight chitosan high molecular weight chitosan is carried out degraded prepare oligo-chitosan, have simple and easy to do, energy consumption is low, efficiency high；Use degradation rate of the present utility model to be significantly improved compared with the degradation rate that existing equipment of Hydrodynamic Cavitation (Venturi tube) prepares oligo-chitosan, at least improve more than 40%, there is the advantage of large-scale industrial application.
Its principle is as follows: the generation of self-vibration cavitation is to be connected with the incoming flow pipe of a diameter of D1 as monofier, resonator cavity entrance with the organ tubular type resonator cavity of an a length of L, a diameter of D2, (D1/D2)2Constitute the entrance necked-down section of resonator cavity.The bottom of resonator cavity is connected with the Outlet Section of a diameter of D3, (D2/ D3)2Constitute the exit constriction section of resonator cavity.Exit constriction section is autoexcitation mechanism, is again feedback mechanism.When stabilized fluid passes through, it is exciting that its contraction front can make fluid produce initial pressure, and pressure excitement can feed back to again resonator cavity, forms feedback pressure vibration.Theoretical according to transient flow, if the frequency of pressure excitement is mated with the natural frequency of resonator cavity, the pressure oscillation of feedback can be amplified, thus in resonator cavity, produce fluid resonant, forming standing wave, in jet shear layer, eddy current becomes big structure separating cyclic eddy current, and the cavitation bubble that cavitation produces can sufficiently be grown up in such a case, the energy produced when crumbling and fall is higher, thus effectively strengthens cavitation.And the shear action of jet also contributes to the degraded of chitosan, the Hydrodynamic cavitation of efficiency ratio has greatly improved.
Accompanying drawing explanation
The self-vibration cavitation apparatus structural representation of Fig. 1: this utility model.
The self-vibration cavitation device structural representation of Fig. 2: this utility model.
In figure: 1-basin, 2-pump, 3-Pressure gauge, 4-self-vibration cavitation device, 41-the first circular hole portion, 42-the second circular hole portion, 43-the 3rd circular hole portion, 44-oared segrne pii, 45-the 4th circular hole portion, 5-water bath with thermostatic control cyclic water tank, 6-valve.
Detailed description of the invention
Embodiment: a kind of self-vibration cavitation apparatus preparing oligo-chitosan, as Figure 1-Figure 2, including water bath with thermostatic control cyclic water tank 5, basin 1, pump 2, self-vibration cavitation device 4 and the pipeline of conveying chitosan solution and the Pressure gauge 3 being arranged on pipeline, valve 6, described pump is connected with basin 1, self-vibration cavitation device 4 respectively by pipeline, and self-vibration cavitation device is connected with basin by pipeline.Described self-vibration cavitation device 4 is the tubular structure with hollow space, flow direction along material, the hollow space of self-vibration cavitation device is respectively first circular hole portion the 41, second circular hole portion the 42, the 3rd circular hole portion 43, oared segrne pii 44 and the 4th circular hole portion 45, the ratio of described first circular hole portion diameter D1 and the second circular hole portion D2 is 1.5～3.5, preferred value is 2.2, the ratio of the second circular hole portion D2 and the 3rd circular hole portion D3 is 1.5～5, and preferred value is 3.
Subordinate list 1: several concrete size of this utility model self-vibration cavitation device.
Subordinate list 1 is only several embodiments of this utility model concrete size of self-vibration cavitation device, in actual application, can carry out suitable zooming in or out according to practical situation.
Described chitosan solution carries out the technological process of self-vibration cavitation technology in this utility model: be placed in basin by chitosan solution, and carry out constant temperature by cyclic water tank, chitosan solution carries out cavitation technology by being pumped into self-vibration cavitation device, by valve regulated inlet pressure, and monitoring pressure by Pressure gauge, the chitosan solution after self-vibration cavitation technology is back in basin；
Contrast test: the method using Chinese patent ZL2010101787923, uses and uses this utility model and Venturi tube to do contrast test, and concrete technological parameter and experimental result are as follows.
Contrast test 1: in degradation process, 40 ° of C, pH 4.4 of temperature, pressure 0.4 MPa, time 30 min, chitosan solution concentration is different, result of the test such as subordinate list 2.
Subordinate list 2: contrast test 1 result.
Contrast test 2: in degradation process, chitosan solution concentration 3g/L, pH 4.4, pressure 0.4 MPa, time 30 min, temperature is different, result of the test such as subordinate list 3.
Subordinate list 3: contrast test 2 result.
Contrast test 3: in degradation process, chitosan solution concentration 3g/L, 40 ° of C of temperature, pressure 0.4 MPa, time 30 min, pH are different, result of the test such as subordinate list 4.
Subordinate list 4: contrast test 3 result.
Contrast test 4: in degradation process, chitosan solution concentration 3g/L, 40 ° of C, pH 4.4 of temperature, time 30 min, pressure is different, result of the test such as subordinate list 5.
Subordinate list 5: contrast test 4 result.
Contrast test 5: in degradation process, chitosan solution concentration 3g/L, 40 ° of C, pH 4.4 of temperature, pressure 0.4 MPa, the time is different, result of the test such as subordinate list 6.
Subordinate list 6: contrast test 5 result.
Can be seen that from the result of above-mentioned contrast experiment, degradation rate of the present utility model is used at least to improve more than 40% compared with the degradation rate that existing equipment of Hydrodynamic Cavitation (Venturi tube) prepares oligo-chitosan, most cases can improve more than 50%, has individual cases even can improve more than 100%.Visible, this utility model is compared with the method that existing equipment of Hydrodynamic Cavitation (Venturi tube) prepares oligo-chitosan, and efficiency is substantially higher a lot.
Claims (2)
1. the self-vibration cavitation apparatus preparing oligo-chitosan, it is characterized in that: include water bath with thermostatic control cyclic water tank (5), basin (1), pump (2), self-vibration cavitation device (4) and the pipeline of conveying chitosan solution and the Pressure gauge (3) being arranged on pipeline, valve (6), described pump is connected with basin (1), self-vibration cavitation device (4) respectively by pipeline, and self-vibration cavitation device is connected with basin by pipeline.
A kind of self-vibration cavitation apparatus preparing oligo-chitosan the most according to claim 1, it is characterized in that: described self-vibration cavitation device (4) is the tubular structure with hollow space, flow direction along material, the hollow space of self-vibration cavitation device is respectively the first circular hole portion (41), the second circular hole portion (42), the 3rd circular hole portion (43), oared segrne pii (44) and the 4th circular hole portion (45), the ratio of described first circular hole portion diameter D1 and the second circular hole portion D2 is 1.5～3.5, and the ratio of the second circular hole portion D2 and the 3rd circular hole portion D3 is 1.5～5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620096552.1U CN205528545U (en) | 2016-01-29 | 2016-01-29 | Preparation chitosan oligosaccharides's natural vibration cavitation device |
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| CN201620096552.1U CN205528545U (en) | 2016-01-29 | 2016-01-29 | Preparation chitosan oligosaccharides's natural vibration cavitation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459190A (en) * | 2017-09-21 | 2017-12-12 | 北京工业大学 | A kind of advanced oxidation organic wastewater treating system and its efficacy test method |
| CN113617494A (en) * | 2021-07-26 | 2021-11-09 | 江苏大学 | Ball milling and cavitation cooperative two-dimensional nanosheet material preparation device and method |
-
2016
- 2016-01-29 CN CN201620096552.1U patent/CN205528545U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459190A (en) * | 2017-09-21 | 2017-12-12 | 北京工业大学 | A kind of advanced oxidation organic wastewater treating system and its efficacy test method |
| CN113617494A (en) * | 2021-07-26 | 2021-11-09 | 江苏大学 | Ball milling and cavitation cooperative two-dimensional nanosheet material preparation device and method |
| CN113617494B (en) * | 2021-07-26 | 2022-09-16 | 江苏大学 | Ball milling and cavitation cooperative two-dimensional nanosheet material preparation device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20190129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |