CN205035363U - High -effect big volume fermentation cylinder of high stable state - Google Patents
High -effect big volume fermentation cylinder of high stable state Download PDFInfo
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- CN205035363U CN205035363U CN201520782724.6U CN201520782724U CN205035363U CN 205035363 U CN205035363 U CN 205035363U CN 201520782724 U CN201520782724 U CN 201520782724U CN 205035363 U CN205035363 U CN 205035363U
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Abstract
The utility model discloses a high -effect big volume fermentation cylinder of high stable state, which comprises a tank body, central department of the internal portion of jar is equipped with hollow (mixing) shaft perpendicularly, evenly lay a plurality of agitators that make jar internal zymotic fluid axial flow on the hollow (mixing) shaft, intermediate shaft bearing and an intermediate shaft bearing leg joint are passed through to hollow (mixing) shaft lower part, the intermediate shaft bearing support pierces through a jar side wall and extends to a jar external portion, the internal portion of jar is along jar axon to laying the vertical tubulation cooler of multiunit, jar body bottom department is equipped with many bubble caps air distribute device. To anecdotes motivation frame, tank deck mechanical seal, (mixing) shaft, shaft coupling and the intermediate shaft bearing support and these mechanical units of resistant grinding shaft tile that constitutes the fermentation cylinder structure, greatly improved the operating stability of fermentation cylinder, for the high -efficient production of energy saving and consumption reduction provides abundant guarantee, have apparent economic benefits and demonstration effect.
Description
Technical field
The utility model relates to amino acids industry fermentation fermentor tank, is specifically related to existing glutamic acid fermentation enterprise 780m
3to ferment the serial innovative technique transformation of large tank, belong to bio-fermentation engineering field.
Background technology
L-glutamic acid (glutamicacid) through in alkali and after sodium salt be namely monosodium glutamate, along with improving constantly of people's living standard, delicate flavour taste compound-monosodium glutamate demand as seasonings is increasing, for meeting consumer market demand, the industrial scale of glutamate production enterprise is in continuous expansion, annual output hundreds of thousands of ton has several family to the enterprise of a hundred or so ten thousand tons in China, and output has accounted for about 85% of Gross World Product.The lifting of existing glutamic acid fermentation enterprise production capacity mainly realizes by strengthening fermenter volume, and obtain scale and benefit with this, thus the volume of glutamic acid fermentation tank is from little medium-sized 150-300m several years ago
3tank volume is gradually to 780m
3maximization future development, when ultimate production is constant, due to the minimizing of fermentor tank production quantity, relatively save equipment investment and maintenance cost, decreased artificial usage quantity, be more conducive to intensive manufacture, reduce production cost to a certain extent, add the competitiveness of product in market.
Fu Feng Group Co., Ltd is one of maximum enterprise of msg output in the world, and the hat of the equal row industry of the indices produced of glutamic acid fermentation, relies on own strength and the accumulation of abundant knowhow, in taking the lead in design and courageously have employed 780m several years ago
3l-glutamic acid produced by fermentor tank, 780m
3fermentor tank concrete structure is shown in Fig. 1.This fermentor tank basic parameter is: tank diameter: 7800mm, and cylindrical shell is high: 14000mm, power of motor: 630kw.Type of belt drive: belt transmission; Solid stir shaft 6: solid four sections, connected by clamping coupling 7; Tank inner support: upper and lower two-layer plummer-block support 5 and support plummer-block 4; Whipped form: two-layer six curved turbine type agitators 2, one deck four blade spindle flow type stirrer; Methods for cooling: three groups of radial sinuous coils form trombone cooler 3; Gas distribution form: concentration of local gas distributor 1; Outer frame: Plate Steel is curled into drum type brake frame 8 through processing; The rotary-type mechanical seal 9 of seal form: 204J.Be 150-300m with tank volume
3glutamic acid fermentation tank is compared, 780m
3it is low that large tank finds to there is production efficiency generally in production run process, the problems such as energy consumption is high, and fermentation parameter is not up to standard; In addition also have equipment operation unstable, tank body oscillating quantity reaches 50mm, swings the security incident also creating can seam cracking throughout the year; Secondly serviceability is poor, all want operator to enter in tank after each batch fermentation is complete to check, maintenance frequency is high, time and effort consuming is dangerous, often delay scheduling of production, by analyzing its reason, with regard to equipment fluctuation of service generation safety problem, all with transmission seal, the stir shaft concentricity of tank, stir bracing frame and arrange unreasonable relevant.Low with regard to production efficiency, energy consumption is high, and fermentation index is not up to standard, relevant with the problem such as agitator type, air inlet distribution, gas-liquid mixture phase, cooling heat transferring upper and lower temperature difference again, also can be summed up as between analogy amplification design and system element and there is structural issue and cause, can 780m be said
3fermentor tank glucose acid invert ratio, acid production rate two important indicators are combined cause not as good as middle-size and small-size tank but not certain single factors causes.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, there is provided a kind of high stable state high-effect large capacity fermenter, by innovating the technological transformation of the key structures such as original fermentor tank transmission, gas distribution, thus reach energy-saving and cost-reducing, reduce production cost, improve the object in glutamic acid yield and extension device work-ing life.
For achieving the above object, the utility model adopts following technical proposals:
The high-effect large capacity fermenter of high stable state, comprise tank body, described tank interior center is vertically provided with hollow stir shaft, described hollow stir shaft evenly lays three layer of six leaf air foil profile axial flow stirrer (making the agitator of fermented liquid axial flow in tank body), described hollow stir shaft bottom is connected with a plummer-block support by plummer-block, described plummer-block support penetrates tank wall and extends to tank body outside, hollow stir shaft provides upper fulcrum support by the mechanical sealing part being positioned at tank body top, and provide lower fulcrum to support by plummer-block support in tank body to hollow stir shaft, two fulcrum being aligneds ensure the concentricity that hollow stir shaft rotates, described tank interior axially lays many group vertical array tubular water coolers along tank body, described tank base place is provided with many bubble-caps air-distributing device, described many bubble-caps air-distributing device comprises main tracheae, described main tracheae is communicated to tank body outside, described main tracheae is communicated with many segmental bronchuses different in size, described bronchial end is equipped with round bubble cap, and gas is discharged by multiple round bubble cap and formed many blister form.
The inner side and outer side of described tank wall all with plummer-block support welding, described plummer-block support is groined type, and groined type center coordinates with plummer-block, eliminates channel-section steel support dead angle and to shelter evil people and countenance evil practices bad cleaning drawback; Groined type steel pipe support penetrates tank skin and carries out interior external welding, plummer-block support and tank body are combined into one, firmness strengthens, and is distributed to whole tank body preferably there being the oscillatory forces formed in load rotation process, can not tears by weld because of metal fatigue stir shaft.
The air foil profile axial flow stirrer outer cover at the middle and lower part place of described hollow stir shaft has guide shell, and described guide shell is fixedly connected by multiple supporting tube and inner tank wall; Air foil profile axial flow stirs the micro-bubble impelling axial linear movement with the combination of guide shell, and mandatory turning back forms complex curve motion, provides better dissolved oxygen effect.
Described many bubble-caps air-distributing device is positioned at tank base center; Air intake becomes small bubbles after bubble-cap dispersion, and from bottom, elegant lift velocity slows down small bubbles, is conducive to oxygen partial pressure transfer.
Described many segmental bronchuses different in size are uniformly distributed radially on main tracheae.
Further, the segmental bronchus of different lengths is separated by laying on main tracheae, and intervening gaps is equal; The segmental bronchus of same length is evenly laid on main tracheae.Gas enters in tank body by justifying bubble cap, and bubble diameter diminishes, and surface-area increases, gas liquid interfacial area expands, and distribution diffusion zone is wider, increases the dissolved oxygen content of fermented liquid, promote growing of glutamate-producing strain, favourable product acid environment is provided, reaches high yield object.
Described tank body tip exterior is provided with and stirs transmission mechanism frame and hollow stir shaft and fix, and described stirring transmission mechanism frame is four-column type frame, and resistance to overturning strengthens, and in four posts, space becomes greatly, is convenient to shaft coupling, the installation of mechanical seal and maintenance.
Described mechanical sealing part adopts silent oscillation axial double mechanical seal structure to seal, and because wear ring floatability is good in operation process, sealing effectiveness is given prominence to, and the degree of wear is little, work-ing life speciality.
Described hollow stir shaft is made up of two joints, and connected by flange-face coupling between the hollow stir shaft of two joints, flanged joint is machined piece, lightweight, balance is good, under equal conditions, the rotating speed of stir shaft can be improved, meet air-proof condition, prevent resonance from producing.
Be provided with carbon fiber tetrafluoroethylene bearing shell abrading block in described plummer-block, wear resistance is better, can adjust bearing shell and stir shaft gap at any time.
The high-effect large capacity fermenter of high stable state of the present utility model has the following advantages:
1. work-ing life: shaft seal adopts intersecting parallels bracket bearing in the mechanical seal of 204J silent oscillation, tank to use 4 years continuously, air tight, without maintenance, without changing.Support welds with tank skin and does not occur tearing security incident again.
2. ventilation: by original 14000m
3/ h, is reduced to 12000m
3/ h, pneumatics power savings is remarkable.
3. power of agitator: before and after improving, agitator motor is not changed, rated output 630kw, and rated current: 1134A, changes primary fermentation electric current 1100A, running at full capacity, improves after-current and drops to 900A, extend motor work-ing life.
4., in equal fermentation period, originally sterilization, cooling and tank inspection need about 7h, and improve due to cooling efficiency and remove the tank inspection time from, labour intensity obviously reduces, and without security incident generation, cooling efficiency improves more than 30%.
5. to ferment index: by the improvement of stir shaft and air-distributing device, glucose acid invert ratio brings up to 63.4% by 58.26%, amplification 5.23%, produces acid and brings up to 14.58% by 13.4%, amplification 8.1%, meet or exceed middle-size and small-size fermentor tank index.
The beneficial effects of the utility model are:
1, to forming the outside gear frame of fermentor tank structure, tank deck mechanical seal, stir shaft, shaft coupling and plummer-block support and these machine assemblies of abrasion-proof bearing bush, have employed some and overturn traditional jar structure unit manufacturing technology, these complex arts are applied to the texture improvement of large fermentation tank, greatly improve the operation stability of fermentor tank, producing for energy saving, consumption reduction and high efficiency provides abundant guarantee.This complex art is adapted to the transformation of the industry a hundred or so ton of tanks such as other amino acid fermentation, biological fermentation medicine, fermentation using enzyme and organic acid fermentation except L-glutamic acid equally, has significant economic benefit and demonstration effect.
2, by guide shell and air foil profile axial flow stirrer and the integrated application of many bubble-caps air-distributing device in large fermentation tank, can ventilation be reduced, obviously improve gas-liquid mixed effect, the product acid of favourable glutamic acid producer, to reach or higher than the fermentation and acid level of middle-size and small-size tank.
3, adopt vertical array tubular water cooler to substitute traditional trombone cooler, cooling area reduces, and cooling performance improves 30%, has baffle effect concurrently, has certain contribution to gas-liquid Homogeneous phase mixing.
Accompanying drawing explanation
Fig. 1 is the 780m mentioned in background technology
3the structural representation of fermentor tank;
Fig. 2 is the structural representation of the high-effect large capacity fermenter of the utility model high stable state;
Fig. 3 is the connection diagram of guide shell and fermentor tank tank wall;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the structural representation of many bubble-caps air-distributing device;
Fig. 6 is the vertical view of Fig. 5;
In figure, 1 is concentration of local gas distributor, 2 is turbine type agitator, 3 is trombone cooler, 4 is plummer-block, 5 is plummer-block support, 6 is solid stir shaft, 7 is clamping coupling, 8 is drum type brake frame, 9 is the rotary-type mechanical seal of 204J, 10 is many bubble-caps air-distributing device, 11 is air foil profile axial flow stirrer, 12 is vertical array tubular water cooler, 13 is plummer-block, 14 is plummer-block support, 15 is hollow stir shaft, 16 is flange-face coupling, 17 is four-column type frame, 18 is the mechanical seal of 204J silent oscillation, 19 is tank wall, 20 is supporting tube, 21 is guide shell, 22 is main tracheae, 23 is tracheae of drawing money on credit, 24 is short segmental bronchus, 25 is circle bubble cap.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 2, the high-effect large capacity fermenter of high stable state, comprise two portions in the outer and tank of tank, tank is outward except tank body, outside motor cabinet, belt pulley are identical with before transformation, stir transmission mechanism frame and adopt four-column type frame 17, resistance to overturning strengthens, in post, space becomes large, is convenient to shaft coupling, the installation of mechanical seal and maintenance.Drum type brake frame originally because of internal space little, the installation of shaft coupling, mechanical seal and maintenance, disassembling section is very inconvenient;
The mechanical sealing part that tank body top is arranged in upper cover center be adopt application number be 201520013895.2 204J silent oscillation mechanical seal 18, because wear ring floatability is good in operation process, sealing effectiveness is given prominence to, and the degree of wear is little, work-ing life speciality;
Flange-face coupling 16 has one in tank deck four-column type frame 17, and its position is positioned at the top of the tank deck support of bearing; Flange-face coupling 16 hollow stir shaft 15 in tank has upper and lower two, and a position on top is carried to pot body closing end welding line top, and a following position does not become, two shaft coupling countershaft extended length.Folder coupling is originally cast member, and appearance is generally irregular, has eccentric mass, and operation process is uneven, and adopt flanged joint 16 for machined piece, lightweight, balance is good, under equal conditions, the rotating speed of stir shaft can be improved, meet air-proof condition, prevent resonance from producing.The support of bearing has one in tank deck frame, and its position is positioned at the below of shaft coupling, has shortened belt and has taken turns to shaft length between shaft coupling.The exchange of the support of bearing and shaft coupling position increases lower shaft torque resistant effect, is conducive to the run stability that maintenance 2 supports situation lower shaft.
Adopt above structure, core--the reliability of potting head top mechanical seal and the work-ing life of the stability, particularly this system stirring actuator system can be ensured.
Tank inner structure:
Hollow stir shaft 15 is Hollow Steel tubular axis, and be that two joint hollow steel pipes make stir shaft, its diameter of axle is a bit larger tham former solid shaft, and after adopting tubular shaft, overall weight alleviates 40%, greatly reduces the pressure load of plummer-block support 14 in tank; Compared with solid shaft, the rigidity of tubular shaft and torsional performance are all much higher, and not easily deformation occur in transport and installation process, practical;
Plummer-block support 14 is the individual layer support of bearing, only be located at one, bottom in tank body, owing to adopting a plummer-block support 14, the hollow stir shaft of entire body 15 becomes upper and lower two fulcrums from upper, middle and lower three fulcrums, eliminate the often perishable plummer-block of wearing and tearing and bracing frame, two points make a line ensure that the concentricity that hollow stir shaft 15 rotates; Plummer-block support 14 arrangement form: adopt groined type steel pipe support, by groined type steel pipe through tank wall 19 carry out inside and outside be welded, support and tank body are combined into one, firmness strengthens, whole tank body can be distributed to preferably there being the oscillatory forces formed in load rotation process to axle, can not tear by weld because of metal fatigue, eliminate simultaneously channel-section steel with dead angle to shelter evil people and countenance evil practices bad cleaning drawback;
Plummer-block 13, is fixed on plummer-block support 14, includes wear-resisting, that gap is adjustable carbon fiber tetrafluoroethylene bearing shell, and wear resistance is better, can adjust bearing shell and stir shaft gap at any time; Carbon fiber tetrafluoroethylene bearing shell employing application number is the bearing bush structure in 201220044289.3.
Vertical array tubular water cooler 12, totally 16 groups, highly more former coiled pipe decreases, and cooling area reduces, and changes rear cold front thermal cycling Inlet and outlet water mode, and heat exchanger effectiveness improves, and overcomes tank temperature difference drawback up and down; Many groups vertical array tubular also serves baffle effect, changes radial flow into axial flow, and increasing non-stirred region mixed effect, is the optimum growth temperature that glutamic acid fermentation bacterium provides high acid to need;
As shown in Fig. 5-Fig. 6, many bubble-caps air-distributing device, comprises main tracheae, the sidewall of described main tracheae is communicated with many segmental bronchuses different in size, the bottom of described main tracheae is inlet mouth, and the top of main tracheae connects end socket, and main tracheae is connected with external admission pipe through fermentor tank lower cover bottom; Described bronchial end is equipped with round bubble cap, and gas is discharged by multiple round bubble cap and formed many blister form.Described many segmental bronchuses different in size are uniformly distributed radially on main tracheae.
Further, the segmental bronchus of different lengths is separated by laying on main tracheae, and intervening gaps is equal.The segmental bronchus of same length is evenly laid on main tracheae.Gas enters in tank body by justifying bubble cap, and bubble diameter diminishes, and surface-area increases, and gas liquid interfacial area expands, and horizontal distribution diffusion zone is wider, increases the dissolved oxygen content in tank body.
Described segmental bronchus is two sections of formations, and two sections by Flange joint, are carried out disassembly, cleaning after convenient so long-time use, ensures that many bubble-caps are given vent to anger the unimpeded of aperture.
Preferably, described main tracheae and end socket are integral type structure.
Preferably, the segmental bronchus of different lengths is positioned at the Different Plane vertical with main tracheae.After gas is discharged by bronchial round bubble cap, in different heights, form bubble, make bubble wider at solid region internal diffusion area.
Described segmental bronchus comprises straight tube, and one end of described straight tube is communicated with main tracheae, and the other end of straight tube is connected with the inlet end of swan neck, and described round bubble cap is positioned at the outlet side of swan neck.
In the present embodiment, many bubble-caps air-distributing device 10 is made up of 8 little bubble-caps, and air is assigned in each little bubble-cap by segmental bronchus after entering from air intake house steward at the bottom of tank, and overflow with small bubbles, its cross section is almost suitable with tank body internal diameter; Because bubble diameter diminishes, surface-area increases, gas liquid interfacial area expands, distribution diffusion zone is wider, and small bubbles are from bottom, and elegant lift velocity slows down, and is conducive to oxygen partial pressure transfer, increase the dissolved oxygen content of fermented liquid, promote growing of glutamate-producing strain, favourable product acid environment is provided, reaches high yield object;
As Figure 3-Figure 4, air foil profile axial flow type stirrer 11 and guide shell 21, air foil profile axial flow type stirrer 11 is kept off by upper, middle and lower three and forming, often gear is six leaves settings, stirrer diameter does not change, blade designs with certain angle, have good shearing action concurrently, guide shell 21 is positioned at middle gear agitator position, six roots of sensation supporting tube 20 is had to be fixedly attached on tank wall 19, middle gear agitator is positioned at guide shell middle and lower part, limits by flared structure and central space, can be formed on fountain and gush pump circulation effect; Originally the setting of turbine type agitator at the bottom of tank is just in order to smash bubble, there is provided radial flow, have benefited from the setting of many bubble-caps air-distributing device in the utility model, air foil profile six vane axial-flow agitator action and function changes, be not used to smash bubble, and the axial flow of fermented liquid in tank is mainly provided.For reaching strengthening dissolved oxygen object, adapted guide shell, makes fermented liquid in tank, carry out the circulation of mandatory repeatedly axial flow, promotes that in tank, gas-liquid carries out abundant oxygen exchange, reduces the spilling speed of bubble.The stirring of air foil profile six vane axial-flow is combined with guide shell the micro-bubble impelling axial linear movement, and enforceable turning back forms complex curve motion, provides better dissolved oxygen effect.Stir and relate to cloth wind the core technology that this large fermentation tank is energy-efficient, improve glucose acid invert ratio productive capacity.
Above-mentioned vertical array tubular water cooler 12, many bubble-caps air-distributing device 10, air foil profile axial flow type stirrer 11 and guide shell 21 form circulation system in tank, are the necessary component units realizing macrotype glutamic acid fermenter stable high yield.
Fermentor tank employing of the present utility model is a set of to be comprised transmission and sealing, air-distributing device and stirs the Trinitarian solution of heat exchange, it is the core technology of new and effective large volume glutamic acid fermentation tank, connect each other to each other, indivisible, single use all can not produce ideal effect.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (10)
1. the high-effect large capacity fermenter of high stable state, it is characterized in that, comprise tank body, described tank interior center is vertically provided with hollow stir shaft, described hollow stir shaft evenly lays multiple agitator making fermented liquid axial flow in tank body, described hollow stir shaft bottom is connected with a plummer-block support by plummer-block, and described plummer-block support penetrates tank wall and extends to tank body outside; Described tank interior axially lays many group vertical array tubular water coolers along tank body; Described tank base place is provided with many bubble-caps air-distributing device.
2. the high-effect large capacity fermenter of high stable state as claimed in claim 1, is characterized in that, the inner side and outer side of described tank wall all with plummer-block support welding, described plummer-block support is groined type, and groined type center coordinates with plummer-block.
3. the high-effect large capacity fermenter of high stable state as claimed in claim 1, is characterized in that, the agitator outer cover at the middle and lower part place of described hollow stir shaft has guide shell, and described guide shell is fixedly connected by multiple supporting tube and inner tank wall.
4. the high-effect large capacity fermenter of high stable state as claimed in claim 1, is characterized in that, described many bubble-caps air-distributing device is positioned at tank base center; Described many bubble-caps air-distributing device comprises main tracheae, and described main tracheae is communicated to tank body outside, and described main tracheae is communicated with many segmental bronchuses different in size, described bronchial end is equipped with round bubble cap, and gas is discharged by multiple round bubble cap and formed many blister form.
5. the high-effect large capacity fermenter of high stable state as claimed in claim 4, is characterized in that, described many segmental bronchuses different in size are uniformly distributed radially on main tracheae.
6. the high-effect large capacity fermenter of high stable state as claimed in claim 5, is characterized in that, the segmental bronchus of different lengths is separated by laying on main tracheae, and intervening gaps is equal; The segmental bronchus of same length is evenly laid on main tracheae.
7. the high-effect large capacity fermenter of high stable state as claimed in claim 1, is characterized in that, described tank body tip exterior is provided with stirring transmission mechanism frame and hollow stir shaft fixes, and described stirring transmission mechanism frame is four-column type frame.
8. the high-effect large capacity fermenter of high stable state as claimed in claim 1, it is characterized in that, described hollow stir shaft provides upper fulcrum support by the mechanical sealing part being positioned at tank body top, and providing lower fulcrum to support by plummer-block support in tank body to hollow stir shaft, two fulcrum being aligneds ensure the concentricity that hollow stir shaft rotates; Described mechanical sealing part adopts silent oscillation axial double mechanical seal structure to seal.
9. the high-effect large capacity fermenter of high stable state as claimed in claim 1, is characterized in that, described hollow stir shaft is made up of two joints, is connected between the hollow stir shaft of two joints by flange-face coupling.
10. the high-effect large capacity fermenter of high stable state as claimed in claim 9, is characterized in that, is provided with carbon fiber tetrafluoroethylene bearing shell abrading block in described plummer-block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520782724.6U CN205035363U (en) | 2015-10-10 | 2015-10-10 | High -effect big volume fermentation cylinder of high stable state |
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|---|---|---|---|
| CN201520782724.6U CN205035363U (en) | 2015-10-10 | 2015-10-10 | High -effect big volume fermentation cylinder of high stable state |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861276A (en) * | 2016-04-07 | 2016-08-17 | 江苏浩特隆搅拌设备有限公司 | Clean intermediate bearing supporting bracket device for fermentation tanks |
| CN106566769A (en) * | 2015-10-10 | 2017-04-19 | 淄博三田化工装备有限公司 | High-steady-state, high-effect, and large-volume fermenting tank |
-
2015
- 2015-10-10 CN CN201520782724.6U patent/CN205035363U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566769A (en) * | 2015-10-10 | 2017-04-19 | 淄博三田化工装备有限公司 | High-steady-state, high-effect, and large-volume fermenting tank |
| CN106566769B (en) * | 2015-10-10 | 2019-03-22 | 淄博三田化工装备有限公司 | The high high-effect big capacity fermenter of stable state |
| CN105861276A (en) * | 2016-04-07 | 2016-08-17 | 江苏浩特隆搅拌设备有限公司 | Clean intermediate bearing supporting bracket device for fermentation tanks |
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