CN101804261B

CN101804261B - Falling film type film evaporator

Info

Publication number: CN101804261B
Application number: CN201010168899XA
Authority: CN
Inventors: 吴利东; 沈军良; 魏东; 薛良妹
Original assignee: JIANGSU SHAJIABANG CHEMICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU SHAJIABANG CHEMICAL EQUIPMENT CO., LTD.
Priority date: 2010-05-06
Filing date: 2010-05-06
Publication date: 2011-09-07
Anticipated expiration: 2030-05-06
Also published as: CN101804261A

Abstract

The invention discloses a falling film type film evaporator, which belongs to the technical field of bio-medicinal and chemical equipment. The film evaporator comprises an evaporation barrel, a film-forming mechanism and a power transmission mechanism, wherein the film-forming mechanism comprises a rotating stand, a receiving pan and a film-forming rotating cage; the rotating stand is connected with the power transmission mechanism; and the film-forming rotating cage is fixed with the receiving pan and carried by the receiving pan to connect the rotating stand. The film evaporator is characterized in that the film-forming rotating cage comprises a middle fixed pan, a bottom fixed pan, a group of fixed rods, a group of knifing roller shafts and knifing rollers, wherein the group of fixed rods are distributed at intervals; the upper end of each fixed rod is fixed with the receiving pan, the middle part is penetrated and fixed on the middle fixed pan, while the lower end is fixed with the bottom fixed pan; the group of knifing roller shafts are longitudinally parallel to one another; the upper end of each knifing roller shaft is fixed with the receiving pan, the middle part is fixed with the middle fixed pan, while the lower end is fixed with the bottom fixed pan; and the knifing rollers are rotationally sleeved on the knifing roller shafts. The film evaporator improves the utilization rate of the equipment, lowers the using cost, improves the evaporation efficiency and reflects energy conservation.

Description

Falling film type film evaporator

Technical field

The invention belongs to the biology,drug and chemical industry equipment technical field, be specifically related to a kind of falling film type film evaporator, be used for material is forced the film forming evaporation, to realize concentrating material.

Background technology

Falling film type film evaporator is extensive use of already in biology,drug and chemical industry and even food additives processing industry etc., but, up to now, the film forming mechanism of the employed downward film evaporator of these industries of China is the scraper-type structure, and the technical scheme that this class formation also can disclosed by utility model patent Granted publication CN2155262Y " movable free outflow falling-film plate type evaporimeter " is seen in.Existing shortcoming has 3 points: the one, and evaporation effect is poor, because wear and tear easily as the scraper plate of drawing together membrane element, when by the scraper plate knifing newly enabled, still can obtain good knifing effect, it is even to be embodied in film forming, but As time goes on, promptly with the aggravation gradually of rubbing board wearing and tearing, the gap between the chamber wall of scraper plate and evaporation cavity increases gradually, and thickness of liquid film is thickening gradually correspondingly, evaporation effect is just faded, finally make the difficult quality guarantee of product, unless regularly or aperiodically change scraper plate, in addition, when scraper plate weares and teares when inconsistent, material or claim the thickness also inconsistent (film forming is inhomogeneous) of liquid film; The 2nd, the purity of product is affected, because the wearer that the scraper plate wearing and tearing are produced is understood contaminated material, thereby makes the difficult quality guarantee of material; The 3rd, the durability fragility of scraper plate is changed in the time of usually need be about 4-6 month, thereby has both influenced the service efficiency of equipment, increases use cost again.Except that above-mentioned shortcoming, the structure of the receiver of film forming mechanism is also lost reasonability, cause from the material (material to be evaporated) of feed pipe introducing comparatively concentrated, can't in time and equably shed the inwall of the evaporation cavity of evaporimeter, thereby material need be smeared down the scraping of long period of rubbing board, could form the uniform film of thickness in the inner wall surface of evaporation cavity is liquid film, so then can be significantly reduced to film speed, both prolonged film formation time, wasting the thermal source that is used for the heating of evaporimeter spacer again is the energy.

In view of the existing deficiency of above-mentioned prior art, the applicant thinks and is necessary to be improved that technical scheme described below produces under this background.

Summary of the invention

Task of the present invention is to provide a kind of and helps to ensure enduringly that film forming evenly uses the raising evaporation effect, help avoiding material to be polluted and use the guarantee product quality, be of value to and alleviate the wearing and tearing of drawing together membrane element and use the service efficiency of support equipment and save the falling film type film evaporator of use cost.

Of the present invention also have a task to be to provide the inwall of the evaporation cavity that a kind of material that feed pipe can be caused on the receiver in time is assigned to evaporimeter equably and use the falling film type film evaporator that improves film forming speed and energy savings.

Task of the present invention is finished like this, a kind of falling film type film evaporator, comprise an evaporation cylindrical shell, the charging and discharging pipe that this evaporation cylindrical shell has evaporation cavity, communicate with evaporation cavity, be located at evaporative cylinder external be used for the cover that the heating jacket to the evaporation cavity heating, being used for of communicating with evaporation cavity fit over the uncovered position at the top of evaporating cylindrical shell with evaporation cavity at the exhaust outlet and the lid of the steam discharge that evaporation process produced; One film forming mechanism is located in the described evaporation cavity with the state of suspending; One power drive mechanism, be located on the described cover, and mechanism is connected with film forming, described film forming mechanism comprises pivoted frame, the applied film forming rotating cage of material that is used to accept the receiver of the material introduced by described feed pipe and is used for to throw by receiver on the chamber wall of described evaporation cavity extremely, pivoted frame is connected with described power drive mechanism, film forming rotating cage and receiver are fixed, and taking the film forming rotating cage by receiver is connected with described pivoted frame, be characterised in that: described film forming rotating cage comprises the center fixed dish, end fixed disk, one group of fixed bar, one group of knifing Roller Shaft and be used for to the material drawout on the chamber wall of described evaporation cavity be liquid film draw together the film roller, one group of fixed bar is spaced apart from each other, the upper end of each fixed bar and described receiver are fixed, the middle part wears and is fixed on the center fixed dish, the lower end is then fixed with end fixed disk, one group of knifing Roller Shaft each interval and parallel longitudinal each other, the upper end and the receiver of each knifing Roller Shaft are fixed, the middle part is fixed with the center fixed dish, and lower end and end fixed disk are fixed, and the knifing roller completely is enclosed within on each knifing Roller Shaft rotationally.

Of the present invention also have a task to finish like this, and the rim of described receiver is provided with one and encloses the material weir, is enclosing the spaced apart cloth hole that is provided with on the material weir.

In a specific embodiment of the present invention, constitute a heat medium chamber between the outer wall of described heating jacket and described evaporation cylindrical shell, side on the top of heating jacket is connected with a heat medium that is used for heat medium is incorporated into described heat medium chamber and introduces interface, and the side in the bottom of heating jacket is connected with one and is used for the heat medium that the heat medium in heat medium chamber is drawn is drawn interface, and wherein: heat medium is introduced, outgoing interface forms angular dependence the position on heating jacket each other.

In another specific embodiment of the present invention, the outer wall of described heating jacket is provided with heat-insulation layer.

In another specific embodiment of the present invention, described heat medium is steam, hot water or conduction oil.

In another specific embodiment of the present invention, the outer wall of the bottom of described evaporation cylindrical shell constitutes a cylindrical shell lower flange, and the bottom of evaporation cylindrical shell has a taper discharge bucket, the upper edge of this taper discharge bucket has a discharge bucket flange along outwards expanding, described cylindrical shell lower flange is fixed by flange hold-down screw and discharge bucket flange, and described discharge nozzle is received the central authorities in the bottom of taper discharge bucket.

Also have in the specific embodiment of the present invention, described cloth hole be shaped as tri-angle-holed or circular port.

More of the present invention and in specific embodiment, described pivoted frame comprises a rotating disk, one group of connecting rod and a fixed disk, rotating disk is connected with the described power drive mechanism that is located on the cover, one group of connecting rod is provided with at interval around rotating disk, the upper end and the rotating disk of each connecting rod are fixed, lower end and fixed disk are fixed, and fixed disk is fixed by the central authorities of clamping ring and described receiver, and the central authorities of this clamping ring have one and are used for upwards drawing the through hole of discharging for described exhaust outlet for the steam of described evaporation cavity.

In of the present invention and then specific embodiment, described power drive mechanism comprises motor and speed reducer, motor and reductor are matched and take motor by reductor and be located on the reductor supporting base, and the reductor supporting base is located at the central authorities of described cover, and the central authorities of the speed reducer output shaft of described reductor and the rotating disk of described pivoted frame are fixed.

Of the present invention again more and in specific embodiment, the global shape of described film forming rotating cage is the mouse cage shape.

Technical scheme provided by the invention is owing to abandoned the scraper plate in the prior art, use is located at knifing roller on the Roller Shaft and the material on the chamber wall of evaporation cavity is rolled draws together evenly, because the film forming roller not only can rotate with the rotation of knifing Roller Shaft, but also but self rotates, revolution and rotation are got both, avoid material is polluted, embody film forming enduringly evenly and guarantee evaporation effect thereby can alleviate wearing and tearing, both help to improve the utilization rate of equipment, can alleviate use cost again.In addition, shed the chamber wall of evaporation cavity equably and form the even liquid film that causes of thickness fast, both helped improving evaporation efficiency, can embody energy-conservation again by the material that the cloth hole of material on the weir will come from feed pipe of enclosing of receiver.

Description of drawings

Fig. 1 is a specific embodiment structure chart of the present invention.

Fig. 2 is the cutaway view of Fig. 1.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

Please provide columnar evaporation cylindrical shell 1 referring to Fig. 1 and Fig. 2, this evaporation cylindrical shell 1 has an evaporation cavity 11, and the chamber wall (inwall, as follows) in material spontaneous evaporation chamber 11 to be evaporated is from top to bottom wandered.Top at the outer wall that evaporates cylindrical shell 1 is connected to a feed pipe 12, the bottom of outer wall is connected to discharge nozzle 13, in addition, top side portion at evaporation cylindrical shell 1 is connected to an exhaust outlet 15, the effect of exhaust outlet 15 is that the steam of light component that evaporation cavity 11 is produced in evaporation process is discharged, for outside condenser condenses, heavy ends are then discharged by the aforesaid discharge nozzle 13 that is positioned at evaporation cylindrical shell 1 bottom, realize the separation that promptly realizes light component that concentrates of material.By the figure finding, bottom at evaporation cylindrical shell 1 has a taper discharge bucket 18, this taper discharge bucket 18 has a discharge bucket flange 181, and the lower edges of evaporation cylindrical shell 1 is formed with an abducent cylindrical shell lower flange 17, and is with flange hold-down screw 171 that cylindrical shell lower flange 17 is fixing with discharge bucket flange 181.Preferred scheme also can be offered the recessed road 1811 of a circle towards a side of cylindrical shell lower flange 17 at discharge bucket flange 181, therewith adaptably, convex with the chimeric bead 172 of a circle at cylindrical shell lower flange 17 towards a side of discharge bucket flange 181, should chimeric bead 172 embed in the aforesaid recessed road 1811.If recessed road 1811 is set on the cylindrical shell lower flange 17, simultaneously chimeric bead 172 is transferred to discharging to the orchid 181 of using stratagems, then be fine equally, because two kinds of schemes are equivalent.Aforesaid discharge nozzle 13 is received the centre in the bottom of taper discharge bucket 18.The uncovered position at the top of evaporation cylindrical shell 1 is provided with cover 16, specifically is with the uncovered position sealing and fixing of cover 16 with evaporation cylindrical shell 1 with one group of cover hold-down screw 161.Outer wall at evaporation cylindrical shell 1, more particularly, be provided with heating jacket 14 at outer wall corresponding to aforesaid evaporation cavity 11, the upper lateral part of this heating jacket 14 is connected to a heat medium and introduces interface 141, and the following side has been received a heat medium and has been drawn interface 142, heat medium is introduced interface 141 and heat medium and is drawn interface 142 and be the diagonal angle each other relation is set, and all communicates with heat medium chamber 143.Energy-conservation in order to embody, prevent thermal loss, therefore the outer wall at heating jacket 14 has additional heat-insulation layer 144.Central authorities in the outside of aforesaid cover 16 are provided with a power drive mechanism 3, power drive mechanism 3 comprises motor 31 and reductor 32 (also can claim gearbox or reduction box), motor 31 connects with known docked mode and reductor 32, and taking motor 31 by reductor 32 is fixed on the reductor supporting base 322 by bearing block 3211, and reductor supporting base 322 is fixed on the cover 16, and the speed reducer output shaft 321 of reductor 32 is stretched in the evaporation cavity 11 and is connected with film forming mechanism 2.

Please continue to see Fig. 1 and Fig. 2, the applicant provide preferably but not the structure of the film forming mechanism 2 that definitely is limited to is as follows: comprise pivoted frame 21, receiver 22 and film forming rotating cage 23, pivoted frame 21 comprises rotating disk 211, one group of connecting rod 212 and fixed disk 213, rotating disk 211 is fixedlyed connected with aforesaid speed reducer output shaft 321, one group of connecting rod 212 is between rotating disk 211 and fixed disk 213, and spaced apart, the upper end of each connecting rod 212 and rotating disk 211 are fixing, and lower end and fixed disk 231 are fixing.When power drive mechanism 3 work, then drive pivoted frame 21 and rotate, and then drive connected film forming rotating cage 23 rotations by pivoted frame 21 by speed reducer output shaft 321.Central authorities at fixed disk 213 have a clamping ring 2131, be connected by clamping ring 2131 and film forming rotating cage 23, and, the central authorities of clamping ring 2131 constitute through hole 21311, this through hole 21311 communicates with evaporation cavity 11, evaporation cavity 11 light component steam that produced and that mentioned in the above (coming from the material) in evaporation process is upwards drawn by through hole 21311, causes the condenser condenses that is connected with exhaust outlet 15 pipelines for aforesaid exhaust outlet 15.Shown in figure, receiver 22 is corresponding to the below of fixed disk 213, and feed pipe discharging opening 121 corresponding (Fig. 2 shows) with aforesaid feed pipe 12, the material that feed pipe 12 is introduced is fed on the receiver 22 by feed pipe discharging opening 121, under the state that receiver 22 rotates with pivoted frame 21, get rid of and on the wall of the chamber of evaporation cavity 11, for film forming rotating cage 23 film forming according to the principle of centrifugal force.

As one of design main points of the present invention program, constitute one at the dish edge position of receiver 22 and enclose material weir 231, this encloses the stack limit that material weir 231 also can be described as receiver 22, enclose the material weir 221 around (circumferencial direction) spaced apart cloth hole 2211 that is provided with, so under buildup dish 22 rotary states material is being shed equably on the chamber wall of evaporation cavity 11, help to improve film forming speed, energy savings.The shape in cloth hole 2211 is preferably tri-angle-holed or circular port, but does not repel the hole of other shape.

Main design main points as the present invention program, show as the Rational structure that is film forming rotating cage 23, global shape is squirrel-cage, specifically comprise center fixed dish 231, end fixed disk 232, one group of fixed bar 233, one group of knifing Roller Shaft 234 and knifing roller 235, one group of fixed bar 233 longitudinal separation distribution each other, and mutual spacing distance is identical, the upper end of each fixed bar 233 and aforesaid receiver 22 are fixing, wear and all center fixed dish 231 and fixing with center fixed dish 231 at the middle part, and lower end and end fixed disk 232 are fixing, one group of knifing Roller Shaft 234 same each interval and parallel longitudinal, the upper end of each knifing Roller Shaft 234 and receiver 22 are fixing, the middle part is placed through equally on the center fixed dish 231 and with center fixed dish 231 and fixes, the lower end is then fixing with end fixed disk 232, and knifing roller 235 completely is enclosed within on each knifing Roller Shaft 234 rotationally.Aforesaid knifing roller 235 also can be described as knifing roller or knifing roller, can freely rotate around knifing Roller Shaft 234, this rotation can be referred to as rotation, and the situation that drives 235 rotations of knifing roller under the state that whole film forming rotating cage 23 rotates can be described as revolution, therefore, knifing roller 235 has the rotating effect that revolution gets both with rotation.More particularly, numerous knifing rollers 235 are pressed to the material that flows down along the inwall of evaporation cavity 11 by centrifugal force, can ensure the even effect of film forming, and the revolution of knifing roller 235 and rotation can greatly reduce wear.Simultaneously, because knifing roller 235 has rotation function, the continuous conversion of its outer surface contacts with the inwall of evaporation cavity 11, makes the ultimate attainment prolongation of life-span of knifing roller 235.Also have, whole film forming rotating cage 23 is just as a huge rolling bearing, thereby the bottom of evaporation cavity 11 need not to be provided with bearing, makes film forming mechanism 2 be arranged in evaporation cavity 11 with (suspensions) state that suspends, and avoided the generation of material in evaporation cavity 11 bottoms accumulation situation.

When use is of the present invention, by feed pipe 11 material to be evaporated is caused receiver 22 from feed pipe discharging opening 121, start motor 31 work of power drive mechanism 3, open the valve on the pipeline that joins with exhaust outlet 15, open the discharging valve on the pipeline that joins with discharge nozzle 13, and the heat medium on the pipeline of the heat medium introducing interface 141 of unlatching heating jacket 14 is introduced valve, heat medium both can be a steam, also can be hot water, can also be conduction oil or other equivalent medium, present embodiment be selected steam for use.Under the work of power drive mechanism 3, drive pivoted frame 21 by it, and and then by pivoted frame 21 drive receiver 22 and film forming rotating cages 23, in this process, material on the receiver 22 is shed (spilling) chamber wall (inwall) to evaporation cavity 11 from the cloth hole 2211 of enclosing on the material weir 221 under action of centrifugal force, by heating jacket 14 heating evaporations, simultaneously by the knifing roller 235 of film forming rotating cage 23 with the material drawout film forming on the chamber wall of evaporation cavity 11, the light component steam that the material evaporation produces drains into condenser condenses by exhaust outlet 15, and the heavy ends material is drawn from discharge nozzle 13, realizes concentrating of material.

In sum, technical scheme provided by the invention has reached goal of the invention, has eliminated the existing shortcoming of prior art, has embodied the applicant at the technique effect described in the advantageous effect hurdle, thereby to can yet be regarded as be a ultimate attainment technical scheme.

Claims

1. falling film type film evaporator, comprise an evaporation cylindrical shell (1), this evaporation cylindrical shell (1) has evaporation cavity (11), the charging and discharging pipe that communicates with evaporation cavity (11), be located at evaporation cylindrical shell (1) outer being used for the cover (16) that the heating jacket (14) to evaporation cavity (11) heating, being used for of communicating with evaporation cavity (11) fit over the uncovered position at the top of evaporating cylindrical shell (1) with evaporation cavity (11) at the exhaust outlet (15) and the lid of the steam discharge that evaporation process produced; One film forming mechanism (2) is located in the described evaporation cavity (11) with the state of suspending; One power drive mechanism (3), be located on the described cover (16), and be connected with film forming mechanism (2), described film forming mechanism (2) comprises pivoted frame (21), the applied film forming rotating cage (23) of material that is used for accepting the receiver (22) of the material introduced by described feed pipe (12) and is used for to throw by receiver (22) on the chamber wall of described evaporation cavity (11) extremely, pivoted frame (21) is connected with described power drive mechanism (3), film forming rotating cage (23) is fixing with receiver (22), and taking film forming rotating cage (23) by receiver (22) is connected with described pivoted frame (21), it is characterized in that: described film forming rotating cage (23) comprises center fixed dish (231), end fixed disk (232), one group of fixed bar (233), one group of knifing Roller Shaft (234) and be used for to the material drawout on the chamber wall of described evaporation cavity (11) be liquid film draw together film roller (235), one group of fixed bar (233) is spaced apart from each other, upper end of each fixed bar (233) and described receiver (22) are fixing, the middle part wears and is fixed on the center fixed dish (231), the lower end is then fixing with end fixed disk (232), one group of knifing Roller Shaft (234) each interval and parallel longitudinal each other, the upper end of each knifing Roller Shaft (234) and receiver (22) are fixing, the middle part is fixing with center fixed dish (231), and lower end and end fixed disk (232) are fixing, and knifing roller (235) completely is enclosed within on each knifing Roller Shaft (234) rotationally.

2. falling film type film evaporator according to claim 1, the rim that it is characterized in that described receiver (22) are provided with one and enclose material weir (221), go up the spaced apart cloth hole (2211) that is provided with enclosing material weir (221).

3. falling film type film evaporator according to claim 1, it is characterized in that constituting a heat medium chamber (143) between the outer wall of described heating jacket (14) and described evaporation cylindrical shell (1), side on the top of heating jacket (14) is connected with a heat medium that is used for heat medium is incorporated into described heat medium chamber (143) and introduces interface (141), and the side in the bottom of heating jacket (14) is connected with one and is used for the heat medium that the heat medium of heat medium chamber (143) is drawn is drawn interface (142), and wherein: heat medium is introduced, the outgoing interface position on heating jacket (14) each other forms angular dependence.

4. according to claim 1 or 3 described falling film type film evaporators, it is characterized in that the outer wall of described heating jacket (14) is provided with heat-insulation layer (144).

5. falling film type film evaporator according to claim 3 is characterized in that described heat medium is steam, hot water or conduction oil.

6. falling film type film evaporator according to claim 1, the outer wall that it is characterized in that the bottom of described evaporation cylindrical shell (1) constitutes a cylindrical shell lower flange (17), and the bottom of evaporation cylindrical shell (1) has a taper discharge bucket (18), the upper edge of this taper discharge bucket (18) has a discharge bucket flange (181) along outwards expanding, described cylindrical shell lower flange (17) is fixing by flange hold-down screw (171) and discharge bucket flange (181), and described discharge nozzle (13) is received the central authorities in the bottom of taper discharge bucket (18).

7. falling film type film evaporator according to claim 2, what it is characterized in that described cloth hole (2211) is shaped as tri-angle-holed or circular port.

8. falling film type film evaporator according to claim 1, it is characterized in that described pivoted frame (21) comprises a rotating disk (211), an one group of connecting rod (212) and a fixed disk (213), rotating disk (211) is connected with the described power drive mechanism (3) that is located on the cover (16), one group of connecting rod (212) is provided with at interval around rotating disk (211), upper end of each connecting rod (212) and rotating disk (211) are fixing, lower end and fixed disk (213) are fixing, and fixed disk (213) is fixed with the central authorities of described receiver (22) by clamping ring (2131), and the central authorities of this clamping ring (2131) have one and are used for upwards drawing the through hole (21311) of discharging for described exhaust outlet (15) for the steam of described evaporation cavity (11).

9. falling film type film evaporator according to claim 8, it is characterized in that described power drive mechanism comprises motor (31) and reductor (32), motor (31) and reductor (32) are matched and take motor (31) by reductor (32) and be located on the reductor supporting base (322), and reductor supporting base (322) is located at the central authorities of described cover (16), and the speed reducer output shaft (321) of described reductor (32) is fixed with the central authorities of the rotating disk (211) of described pivoted frame (21).

10. falling film type film evaporator according to claim 1 is characterized in that the global shape of described film forming rotating cage (23) is the mouse cage shape.