CN115845425B - Energy-saving and environment-friendly rectifying tower for improving purity of lactic acid - Google Patents
Energy-saving and environment-friendly rectifying tower for improving purity of lactic acid Download PDFInfo
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- CN115845425B CN115845425B CN202310175311.0A CN202310175311A CN115845425B CN 115845425 B CN115845425 B CN 115845425B CN 202310175311 A CN202310175311 A CN 202310175311A CN 115845425 B CN115845425 B CN 115845425B
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Abstract
The invention relates to the technical field of rectifying towers, in particular to an energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid. Including the tower body, the internally mounted of tower body has auxiliary assembly, the inner wall of tower body rotates and is connected with the outer axle, the inner wall of outer axle rotates and is connected with interior axle, the upper portion fixed mounting of tower body has servo motor, outer axle and interior axle all drive through servo motor, the transmission of the week side of outer axle is connected with a membrane section of thick bamboo, the lower part fixed mounting of tower body separates a section of thick bamboo, the inside of separating a section of thick bamboo has offered anti-clear chamber and a dirty chamber from interior to exterior respectively, the internally mounted in anti-clear chamber is equipped with interior axle complex anti-clear subassembly, the pneumatic ring chamber has been seted up to the inside of separating a section of thick bamboo and corresponding anti-clear chamber and the position between the dirty chamber. The beneficial effects of the invention are as follows: according to the invention, through the arrangement of the structures such as the tower body, the stirring module, the condensing module and the like, the device can efficiently finish the rectification and purification operation of the lactic acid, and the device is additionally provided with a self-cleaning structure for separating the membrane cylinder on the basis of the traditional rectification tower.
Description
Technical Field
The invention relates to the technical field of rectifying towers, in particular to an energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid.
Background
Lactic acid is an organic acid, which can be used as food additive, high purity material grade lactic acid can be used as raw material for producing biodegradable material, and lactic acid ester is a new ester substance synthesized by adding other substances into lactic acid through chemical reaction.
Lactic acid can be produced by fermentation or chemical synthesis, but because of environmental problems, the use of renewable resources to replace petrochemical products for producing lactic acid has become the current main trend, in the prior art, the patent document with publication number CN111592458A discloses a method for separating and obtaining refined lactic acid from lactic acid fermentation broth, the method effectively combines solid-liquid separation, decolorization, membrane filtration, continuous ion exchange and concentration, and refined lactic acid is obtained from lactic acid fermentation broth by separation, the patent document with publication number CN113087615A discloses a method for separating lactic acid from lactic acid fermentation broth, the method introduces membrane rectification technology into the separation of lactic acid for the first time, the method effectively combines membrane separation, decolorization, electrodialysis and membrane rectification, and obtains refined lactic acid from lactic acid fermentation broth, and particularly adopts membrane rectification technology, so that the recovery rate of lactic acid is effectively improved, and energy consumption is reduced.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention provides the energy-saving and environment-friendly rectifying tower for improving the purity of the lactic acid, which solves the problems that the rectification technology of the lactic acid film used in the existing rectifying tower is used for separating and the outer cylinder surface of the filtering film cylinder is easy to adhere impurities when the rectification is carried out, and after the impurities are adhered to the film cylinder, the rectification efficiency of the lactic acid is influenced on one hand, the energy conservation of a rectifying device is reduced, the rectification purity of the lactic acid is reduced on the other hand, the condensation of the lactic acid is caused when the condenser shell is in contact with the external low-temperature environment when the external condenser of the existing rectifying tower works, and a small amount of water and other low-boiling-point impurities are mixed into a product after condensation, so that the purity of the lactic acid is reduced, and the quality of the lactic acid product is influenced.
The technical scheme for solving the technical problems is as follows: the utility model provides an energy-concerving and environment-protective rectifying column of improvement lactic acid purity, includes the tower body, the internally mounted of tower body has auxiliary assembly, the inner wall of tower body rotates and is connected with the outer axle, the inner wall of outer axle rotates and is connected with the interior axle, the upper portion fixed mounting of tower body has servo motor, outer axle and interior axle all drive through servo motor, the week side transmission of outer axle is connected with the membrane section of thick bamboo, the lower part fixed mounting of tower body has a section of thick bamboo that separates, the inside of separating the section of thick bamboo has offered anti-clear chamber and a dirty chamber respectively from interior to exterior, the internally mounted in anti-clear chamber has with interior axle complex anti-clear subassembly, the pneumatic ring chamber has been seted up to the position between the inside of separating the section of thick bamboo and corresponding anti-clear chamber and the dirty chamber, the week side and pneumatic ring chamber sliding connection of membrane section of thick bamboo, the inside and the position of corresponding membrane section of thick bamboo below install compression spring, the surface mounting of tower body has the pressure feed subassembly with pneumatic ring chamber intercommunication, the inside of tower body and the position fixed outside that separates the section of thick bamboo has seted up anti-clear chamber respectively, the inside of thick bamboo is equipped with the inside of rectifying module and the inside of rectifying module, the inside of rectifying module has.
The beneficial effects of the invention are as follows:
according to the invention, through the arrangement of the structures such as the tower body, the stirring module and the condensing module, the device can efficiently finish the rectification purification operation of the lactic acid, the self-cleaning structure for separating the membrane cylinder is additionally arranged on the basis of the traditional rectification tower, in the rectification process, when the surface of the membrane cylinder needs to be subjected to gas cleaning, the membrane cylinder reciprocates up and down along the direction of the pneumatic annular cavity under the action of the pressure-feeding component, in the process of the up and down reciprocating motion of the membrane cylinder along the pneumatic annular cavity, the inner shaft drives the blowing fan blade b to blow air in the direction of the reverse cleaning spray hole, the blowing fan blade a blows air in the direction of the blowing air flow channel, and after the reverse cleaning spray hole discharges air, the surface of the membrane cylinder is subjected to rapid gas cleaning through the backflushing principle, and finally, the impurities discharged from the gas are discharged through the pollution discharge cavity and the sewage discharge pipe.
In the prior art, lactic acid is vaporized after being heated to reach the boiling point, vaporized lactic acid steam is condensed when being cooled, the purity of the lactic acid can be improved under the controllable condensation state, when the external condenser works, the condenser shell is in contact with the external low-temperature environment, and meanwhile, a small amount of low-boiling-point impurities such as water are condensed and mixed into the product to reduce the purity of the lactic acid, so that the quality of the lactic acid product is influenced.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the auxiliary assembly respectively comprises a milk inlet pipe, a sundry discharge pipe and a blow-off pipe, wherein the milk inlet pipe is arranged on the upper portion of the tower body and is communicated with the rectification cavity, the sundry discharge pipe is arranged on the bottom of the tower body and is communicated with the rectification cavity, the blow-off pipe is arranged on the bottom of the separation barrel, valves are respectively arranged in the milk inlet pipe, the sundry discharge pipe and the blow-off pipe, and a spiral heating coil and a heat preservation and heat insulation layer are sequentially and fixedly arranged on the inner lower portion of the tower body from inside to outside.
The technical scheme has the beneficial effects that the heat preservation and insulation layer is made of heat preservation materials, when rectification operation is carried out, the spiral heating coil is used for heating the tower body in a set state, the impurity discharge pipe is used for discharging impurities after lactic acid purification, and the drain pipe is used for discharging the dirt adhered to the surface of the membrane cylinder.
Further, turn clear subassembly respectively including seting up in the air supply runner of interior axis position and being fixed in the tower body top and with the air supply runner rotation air supply section of thick bamboo of intercommunication, the upper portion equipartition of air supply section of thick bamboo has the air supply filtration pore, the inner wall rotation of air supply section of thick bamboo is connected with the pivot through servo motor driven, the periphery of pivot just corresponds the inside position of air supply section of thick bamboo and installs air-blast fan leaf a, the periphery of interior axle just corresponds the inside position of turn clear chamber and installs air-blast fan leaf b, a set of circular array distribution and the ventilation hole with air supply runner intercommunication have been seted up to the inside of interior just corresponding air-blast fan leaf a below the position of interior axle, a set of circular array distribution and the air-out direction just face to the anti clear orifice of dirty chamber and membrane section of thick bamboo of seting up of separating, the tail end and the anti clear chamber fixed intercommunication of turning back.
The technical scheme has the advantages that in the rectification process, when air cleaning is needed to be carried out on the surface of the film cylinder, the film cylinder reciprocates up and down along the direction of the pneumatic annular cavity under the action of the air feeding component, in the process that the film cylinder reciprocates up and down along the pneumatic annular cavity, the inner shaft drives the blowing fan blade b to blow towards the direction of the reversely cleaning spray hole, the blowing fan blade a blows air towards the direction of the blowing flow channel, and after the reversely cleaning spray hole blows air, the air cleaning is carried out on the surface of the film cylinder rapidly through the backflushing principle, and finally the air-cleaned impurities are discharged through the dirt discharging cavity and the blow-off pipe.
Further, send and press the subassembly including being fixed in the suction pump of tower body week side, the port fixed intercommunication of suction pump has accuse pressure pipe, the inside of accuse pressure pipe is installed pneumatic valve and air pressure probe respectively, the other end and the pneumatic ring chamber fixed intercommunication of accuse pressure pipe, the bottom surface fixed mounting of membrane section of thick bamboo has the piston ring with pneumatic ring chamber sliding connection, the week side fixed mounting of piston ring has the sealing washer.
The technical scheme has the beneficial effects that in the rectification process, when the surface of the membrane cylinder is required to be subjected to air cleaning, the suction pump controls the air quantity and air pressure in the air-pressure ring cavity, so that the membrane cylinder is driven to reciprocate up and down in a set stroke, and the air pressure probe is used for monitoring air pressure data in the air-pressure ring cavity in real time.
Further, the outer shaft is of a regular polygon structure, the membrane cylinder is of a hollow cylindrical structure with the top end closed and the lower end open, a transmission sleeve matched with the outer shaft in shape is fixedly arranged at the axial line position of the top surface of the membrane cylinder, and the transmission sleeve is of a hollow tubular structure with two open ends.
The film cylinder has the beneficial effects that when in use, the film cylinder can be continuously driven by the outer shaft through the structural arrangement of the outer shaft and the transmission sleeve in the up-and-down reciprocating motion process.
Further, the stirring module respectively comprises an outer gear ring, an inner gear ring, a shaft coupling, a rotating frame arranged on the peripheral side surface of the outer shaft, and a positive shaft and a reverse shaft which are symmetrically arranged, wherein the peripheral side surfaces of the positive shaft and the reverse shaft are rotationally connected with the rotating frame, the peripheral side surface of the outer gear ring and the top surface of the inner gear ring are fixedly connected with the tower body, an outer gear which is in transmission connection with the outer gear ring is fixedly arranged at the top of the positive shaft, a linkage gear which is in transmission connection with the inner gear ring is fixedly arranged at the top of the shaft coupling, an inner gear which is meshed with the linkage gear is fixedly arranged at the top of the reverse shaft, and a group of stirring sheets which are regularly distributed are fixedly arranged at the positions of the peripheral side surfaces of the positive shaft and the reverse shaft and the positions corresponding to the inner parts of the rectification cavities.
The technical scheme has the beneficial effects that during rectification operation, the positive shaft and the reverse shaft are opposite in rotation direction, and stirring operation is performed on liquid to be rectified, and the rectification efficiency of lactic acid is effectively improved through stirring.
Further, the condensation module is including setting up in the inside condensation chamber of tower, a set of being circumference array distribution and set up in the air vent of outer lower part and fixed mounting in tower upper portion and with the ring chamber of giving vent to anger of exhaust rotation intercommunication, the tail end and the ring chamber intercommunication of exhaust of air vent, the inside rotation of condensation chamber is connected with condensing coil, the top surface of ring chamber of giving vent to anger is fixed to be linked together has the air duct, condensing coil's upper portion rotation intercommunication has the air duct, the one end and the fixed intercommunication of air duct gas outlet, condensing coil's bottom mounting sets up smart breast discharge, the outside of tower is installed respectively with cooling water inlet tube and the heat transfer water exit tube of condensing chamber intercommunication.
The technical scheme has the advantages that the refined milk outlet is rotationally communicated with next stage treatment equipment of the rectified lactic acid during rectification operation, the cooling water inlet pipe and the heat exchange water outlet pipe are communicated with circulation feeding equipment of the cooling water, then the cooling liquid is continuously fed into the interior of the condensing cavity, the condensing coil rotates at a set speed during rectification operation, so that the heat exchange effect of the cooling water and the condensing coil is effectively improved, the condensing efficiency of the condensing cavity is improved, and the milk entering the interior of the film cylinder is subjected to heat exchange condensation treatment through the air vent hole, the exhaust ring cavity and the air outlet ring pipe during rectification operation, and the upper end and the lower end of the condensing coil are fixedly communicated with connecting joints;
in the prior art, lactic acid is vaporized after being heated to reach the boiling point, vaporized lactic acid steam is condensed when being cooled, the purity of the lactic acid can be improved under the controllable condensation state, when the external condenser works, the condenser shell is in contact with the external low-temperature environment, and meanwhile, a small amount of low-boiling-point impurities such as water are condensed and mixed into the product to reduce the purity of the lactic acid, so that the quality of the lactic acid product is influenced.
Further, servo motor is the double-end motor, the top rotation of tower body is connected with the differential axle, the differential axle passes through servo motor drive, the week side of differential axle is connected with pivot and condensing coil transmission respectively through the chain.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of an energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid;
FIG. 2 is a schematic cross-sectional view of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of a partial enlarged structure at A in FIG. 2 according to the present invention;
FIG. 4 is a schematic view of a partially enlarged structure of the present invention at B in FIG. 2;
FIG. 5 is a schematic view of a partially enlarged structure of the present invention at C in FIG. 2;
FIG. 6 is a schematic view of a partially enlarged structure of the present invention at D in FIG. 2;
FIG. 7 is a schematic view of a partial enlarged structure at E in FIG. 2 according to the present invention;
fig. 8 is a schematic cross-sectional view of a condensing chamber according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a tower body; 2. an outer shaft; 3. an inner shaft; 4. a servo motor; 5. a membrane cylinder; 6. a separation barrel; 7. reverse cavity cleaning; 8. a dirt outlet cavity; 9. a pneumatic ring cavity; 10. a compression spring; 11. a milk inlet pipe; 12. a sundry discharge pipe; 13. a blow-down pipe; 14. a spiral heating coil; 15. an air supply tube; 16. a rotating shaft; 17. a blower fan blade a; 18. a blower fan blade b; 19. ventilation holes; 20. reversely cleaning the spray hole; 21. a suction pump; 22. a pressure control tube; 23. an outer ring gear; 24. an inner gear ring; 25. coupling shaft; 26. a rotating frame; 27. a positive axis; 28. a counter shaft; 29. stirring; 30. a condensing chamber; 31. air-vent holes; 32. an air outlet ring pipe; 33. a condensing coil; 34. an air duct; 35. a cooling water inlet pipe; 36. a heat exchange water outlet pipe; 37. and a differential shaft.
Description of the embodiments
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The present invention provides the following preferred embodiments
As shown in fig. 1-8, an energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid comprises a tower body 1, wherein an auxiliary component is arranged in the tower body 1;
the inner wall of the tower body 1 is rotationally connected with an outer shaft 2, the inner wall of the outer shaft 2 is rotationally connected with an inner shaft 3, a servo motor 4 is fixedly arranged at the upper part of the tower body 1, the servo motor 4 is a double-headed motor, the outer shaft 2 and the inner shaft 3 are driven by the servo motor 4, driven bevel gears are fixedly arranged on the peripheral sides of the inner shaft 3 and the outer shaft 2, two transmission bevel gears are fixedly arranged at the output shaft end of the servo motor 4, and the peripheral sides of the two transmission bevel gears are respectively meshed with the two driven bevel gears;
the peripheral side face transmission of outer axle 2 is connected with membrane section of thick bamboo 5, and outer axle 2 is regular polygon structure, and membrane section of thick bamboo 5 is the hollow tubular structure of top closed lower extreme open-ended, and the top surface axis position fixed mounting of membrane section of thick bamboo 5 has the transmission sleeve pipe with outer axle 2 shape adaptation, and the transmission sleeve pipe is the hollow tubular structure of both ends open-ended.
When in use, the structure of the outer shaft 2 and the transmission sleeve is adopted, so that the outer shaft 2 can continuously transmit the film cylinder 5 in the process of up-and-down reciprocating motion of the film cylinder 5;
the lower part of the tower body 1 is fixedly provided with a separation barrel 6, the inside of the separation barrel 6 is provided with a reverse cleaning cavity 7 and a sewage outlet cavity 8 from inside to outside, and the inside of the reverse cleaning cavity 7 is provided with a reverse cleaning component matched with the inner shaft 3;
the anti-clear subassembly is including seting up in the air supply runner of interior 3 axis positions and being fixed in tower body 1 top and with air supply runner pivoted intercommunication's air-supply duct 15 respectively, air supply filtration pore is evenly distributed on the upper portion of air-supply duct 15, the inner wall of air-supply duct 15 rotates and is connected with the pivot 16 through servo motor 4 driven, the peripheral side of pivot 16 just corresponds the inside position of air-supply duct 15 and installs the fan leaf a17, the peripheral side of interior 3 just corresponds the inside position of anti-clear chamber 7 and installs the fan leaf b18, a set of circumference array distribution and with the air-permeable hole 19 of air supply runner intercommunication have been seted up to the inside of interior 3 just corresponding the position of fan leaf a17 below, a set of circumference array distribution and the anti-clear orifice 20 of air-out direction just to dirt outlet chamber 8 and membrane section of thick bamboo 5 have been seted up to the inside of separating section of thick bamboo 6, the tail end and the anti-clear chamber 7 fixed intercommunication of anti-clear orifice 20.
In the rectification process, when the surface of the film cylinder 5 needs to be subjected to air cleaning, the film cylinder 5 reciprocates up and down along the direction of the pneumatic annular cavity 9 under the action of the air feeding and pressing component, in the process that the film cylinder 5 reciprocates up and down along the pneumatic annular cavity 9, the inner shaft 3 drives the blowing fan blade b18 to blow air towards the direction of the anti-cleaning spray hole 20, the blowing fan blade a17 blows air towards the direction of the air feeding flow channel, and after the anti-cleaning spray hole 20 blows air, the surface of the film cylinder 5 is subjected to quick air cleaning through the backflushing principle, and finally the air-cleaned impurities are discharged through the dirt outlet cavity 8 and the blow-off pipe 13.
A pneumatic ring cavity 9 is arranged in the partition cylinder 6 and corresponds to the position between the reverse cleaning cavity 7 and the pollution discharge cavity 8, the peripheral side surface of the membrane cylinder 5 is in sliding connection with the pneumatic ring cavity 9, a compression spring 10 is arranged in the pneumatic ring cavity 9 and corresponds to the position below the membrane cylinder 5, and a pressure-transmitting assembly communicated with the pneumatic ring cavity 9 is arranged on the surface of the tower body 1;
the pressure sending component comprises a suction pump 21 fixed on the circumferential side surface of the tower body 1, a pressure control pipe 22 is fixedly communicated with a port of the suction pump 21, an air valve and an air pressure probe are respectively installed in the pressure control pipe 22, the other end of the pressure control pipe 22 is fixedly communicated with the pneumatic annular cavity 9, a piston ring which is in sliding connection with the pneumatic annular cavity 9 is fixedly installed on the bottom surface of the membrane cylinder 5, and a sealing ring is fixedly installed on the circumferential side surface of the piston ring.
In the rectification process, when the surface of the membrane cylinder 5 is required to be subjected to air cleaning, the suction pump 21 controls the air quantity and air pressure in the air-pressure ring cavity 9, so that the membrane cylinder 5 is driven to reciprocate up and down in a set stroke, and the air pressure probe is used for monitoring air pressure data in the air-pressure ring cavity 9 in real time.
The rectifying cavity is fixedly arranged in the tower body 1 and corresponds to the position of the outer side of the separation barrel 6, the stirring module matched with the rectifying cavity is fixedly arranged on the circumferential side surface of the outer shaft 2, and the condensing module is arranged in the tower body 1.
The auxiliary assembly comprises a milk inlet pipe 11 arranged on the upper portion of the tower body 1 and communicated with the rectification cavity, a sundry discharge pipe 12 arranged on the bottom of the tower body 1 and communicated with the rectification cavity, and a blow-off pipe 13 arranged on the bottom of the separation barrel 6, wherein valves are respectively arranged in the milk inlet pipe 11, the sundry discharge pipe 12 and the blow-off pipe 13, and a spiral heating coil 14 and a heat preservation and insulation layer are fixedly arranged on the inner lower portion of the tower body 1 from inside to outside in sequence.
The heat insulation layer is made of heat insulation materials, when rectification operation is carried out, the spiral heating coil 14 is used for heating the tower body 1 in a set state, the impurity discharge pipe 12 is used for discharging impurities after lactic acid purification, and the sewage discharge pipe 13 is used for discharging sewage adhered to the surface of the membrane cylinder 5.
The stirring module comprises an outer gear ring 23, an inner gear ring 24, a coupling 25, a rotating frame 26 arranged on the peripheral side surface of an outer shaft 2, a positive shaft 27 and a reverse shaft 28 which are symmetrically arranged, wherein the peripheral side surfaces of the positive shaft 27 and the reverse shaft 28 are rotationally connected with the rotating frame 26, the peripheral side surface of the outer gear ring 23 and the top surface of the inner gear ring 24 are fixedly connected with a tower body 1, an outer gear which is in transmission connection with the outer gear ring 23 is fixedly arranged at the top of the positive shaft 27, a linkage gear which is in transmission connection with the inner gear ring 24 is fixedly arranged at the top of the coupling 25, an inner gear which is meshed with the linkage gear is fixedly arranged at the top of the reverse shaft 28, and a group of stirring sheets 29 which are regularly distributed are fixedly arranged at the positions of the peripheral side surfaces of the positive shaft 27 and the reverse shaft 28 and corresponding to the inside of a rectification cavity.
During rectification operation, the forward shaft 27 and the reverse shaft 28 are opposite in rotation direction, and stirring operation is performed on liquid to be rectified, so that the rectification efficiency of lactic acid is effectively improved through stirring.
The condensing module comprises a condensing cavity 30 arranged in the tower body 1, a group of air-vent holes 31 which are distributed in a circumferential array and are arranged at the lower part of the outer shaft 2, and an air-vent ring pipe 32 which is fixedly arranged at the upper part of the tower body 1 and is communicated with the air-vent ring cavity in a rotating way, wherein the tail end of the air-vent hole 31 is communicated with the air-vent ring cavity, a condensing coil 33 is connected in the condensing cavity 30 in a rotating way, an air duct 34 is fixedly communicated with the top surface of the air-vent ring pipe 32, an air duct is communicated with the upper part of the condensing coil 33 in a rotating way, one end of the air outlet of the air duct 34 is fixedly communicated with the air duct, a fine emulsion discharge port is fixedly arranged at the bottom end of the condensing coil 33, and a cooling water inlet pipe 35 and a heat exchange water outlet pipe 36 which are communicated with the condensing cavity 30 are respectively arranged outside the tower body 1.
The refined milk discharging port is rotationally communicated with next-stage treatment equipment of the rectification liquid during rectification operation, the cooling water inlet pipe 35 and the heat exchange water outlet pipe 36 are communicated with circulation feeding equipment of the cooling water, then the cooling liquid is continuously fed into the interior of the condensation cavity 30, the condensation coil 33 rotates at a set speed during rectification operation, so that the heat exchange effect of the cooling water and the condensation coil 33 is effectively improved, the condensation efficiency of the condensation cavity 30 is improved, and during rectification operation, the milk gas entering the interior of the membrane cylinder 5 enters the condensation coil 33 for heat exchange condensation treatment through the air vent hole 31, the exhaust annular cavity and the air outlet annular pipe 32, and the upper end and the lower end of the condensation coil 33 are fixedly communicated with connecting joints;
in the prior art, lactic acid is vaporized after being heated to reach the boiling point, vaporized lactic acid steam is condensed when being cooled, the purity of the lactic acid can be improved under the controllable condensation state, when the external condenser works, the condenser shell is in contact with the external low-temperature environment, and meanwhile, a small amount of low-boiling-point impurities such as water are condensed and mixed into the product to reduce the purity of the lactic acid, so that the quality of the lactic acid product is influenced.
The top of the tower body 1 is rotationally connected with a differential shaft 37, the differential shaft 37 is driven by a servo motor 4, and the peripheral side surface of the differential shaft 37 is respectively in transmission connection with the rotating shaft 16 and the condensing coil 33 through chains.
To sum up: the beneficial effects of the invention are embodied in that
According to the invention, through the arrangement of the structures such as the tower body, the stirring module, the condensing module and the like, the device can efficiently finish the rectification and purification operation of the lactic acid, and the device is additionally provided with a self-cleaning structure for separating the membrane cylinder on the basis of the traditional rectification tower.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides an energy-concerving and environment-protective rectifying column of improvement lactic acid purity, includes tower body (1), the internally mounted of tower body (1) has auxiliary assembly, its characterized in that, the inner wall of tower body (1) rotates and is connected with outer axle (2), the inner wall of outer axle (2) rotates and is connected with interior axle (3), servo motor (4) are installed to the upper portion fixed mounting of tower body (1), outer axle (2) and interior axle (3) all drive through servo motor (4), the week side transmission of outer axle (2) is connected with membrane cartridge (5), the lower part fixed mounting of tower body (1) has a section of thick bamboo (6) that separates, anti-clear chamber (7) and play dirty chamber (8) have been seted up respectively from inside to outside to the inside of section of thick bamboo (6), anti-clear subassembly with the complex of thick bamboo (3) is rotated to the inside of anti-clear chamber (7), the position between anti-clear chamber (7) and the dirty chamber (8) of the corresponding of inner axle (6) has been seted up pneumatic chamber (9), pneumatic chamber (5) are connected with pneumatic chamber (9) and pneumatic chamber (9) of pneumatic chamber (9) side down, pneumatic chamber (9) are installed to the pneumatic chamber (9) and pneumatic chamber (9) are connected with the side of pneumatic chamber (5) side of the dynamic link-pressure-side of the tower body (1) respectively, the rectifying device is characterized in that a rectifying cavity is fixedly formed in the tower body (1) and corresponds to the outer side of the separation barrel (6), a stirring module matched with the rectifying cavity is fixedly arranged on the peripheral side face of the outer shaft (2), and a condensing module is arranged in the tower body (1);
the auxiliary assembly comprises a milk inlet pipe (11) which is arranged at the upper part of the tower body (1) and is communicated with the rectification cavity, a sundry discharge pipe (12) which is arranged at the bottom of the tower body (1) and is communicated with the rectification cavity, and a blow-off pipe (13) which is arranged at the bottom of the separation barrel (6), wherein valves are respectively arranged in the milk inlet pipe (11), the sundry discharge pipe (12) and the blow-off pipe (13), and a spiral heating coil (14) and a heat preservation and heat insulation layer are sequentially and fixedly arranged at the inner lower part of the tower body (1) from inside to outside;
the anti-clear subassembly is including seting up in the air supply runner of interior axle (3) axis position and being fixed in tower body (1) top and with air supply runner rotation blast dryer (15) of intercommunication respectively, the upper portion equipartition of blast dryer (15) has the air supply filtration pore, the inner wall rotation of blast dryer (15) is connected with pivot (16) through servo motor (4) driven, blow fan blade a (17) are installed to the week side of pivot (16) and the position that corresponds inside blast dryer (15), blow fan blade b (18) are installed to the week side of interior axle (3) and the position that corresponds the inside of anti-clear chamber (7), a set of ventilation hole (19) that are circumference array distribution and communicate with the air supply runner are seted up to the position of interior axle (3) and corresponding blow fan blade a (17) below, a set of circumference array distribution and the air-out direction just are just to dirt chamber (8) and anti-clear orifice (20) of membrane drum (5) are seted up to the inside of separating drum (6), the tail end and the anti-clear chamber (7) of anti-clear orifice (20) are fixed intercommunication.
2. The energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid according to claim 1, wherein the pressure-feeding assembly comprises a suction pump (21) fixed on the circumferential side surface of the tower body (1), a pressure control pipe (22) is fixedly communicated with a port of the suction pump (21), an air valve and an air pressure probe are respectively arranged in the pressure control pipe (22), the other end of the pressure control pipe (22) is fixedly communicated with a pneumatic ring cavity (9), a piston ring which is in sliding connection with the pneumatic ring cavity (9) is fixedly arranged on the bottom surface of the membrane cylinder (5), and a sealing ring is fixedly arranged on the circumferential side surface of the piston ring.
3. The energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid according to claim 1, wherein the outer shaft (2) is of a regular polygon structure, the membrane cylinder (5) is of a hollow tubular structure with a closed top end and an open lower end, a transmission sleeve matched with the outer shaft (2) in shape is fixedly arranged at the axial line position of the top surface of the membrane cylinder (5), and the transmission sleeve is of a hollow tubular structure with two open ends.
4. The energy-saving and environment-friendly rectifying tower for improving lactic acid purity according to claim 1, wherein the stirring module comprises an outer gear ring (23), an inner gear ring (24), a coupling (25), a rotating frame (26) arranged on the peripheral side surface of the outer shaft (2), a positive shaft (27) and a reverse shaft (28) which are symmetrically arranged, the peripheral side surfaces of the positive shaft (27) and the reverse shaft (28) are rotationally connected with the rotating frame (26), the peripheral side surfaces of the outer gear ring (23) and the top surface of the inner gear ring (24) are fixedly connected with a tower body (1), an outer gear in transmission connection with the outer gear ring (23) is fixedly arranged at the top of the positive shaft (27), a linkage gear in transmission connection with the inner gear ring (24) is fixedly arranged at the top of the coupling (25), and a group of stirring sheets (29) which are regularly distributed are fixedly arranged at the peripheral side surfaces of the positive shaft (27) and the reverse shaft (28) and correspond to the positions inside the rectifying cavity.
5. The energy-saving and environment-friendly rectifying tower for improving lactic acid purity according to claim 1, wherein the condensing module comprises a condensing cavity (30) formed in the tower body (1), a group of air-vent holes (31) distributed in a circumferential array and formed in the lower part of the outer shaft (2) and an air-vent ring pipe (32) fixedly mounted on the upper part of the tower body (1) and communicated with the air-vent ring cavity in a rotating mode, the tail end of the air-vent hole (31) is communicated with the air-vent ring cavity, a condensing coil (33) is rotationally connected to the inside of the condensing cavity (30), an air duct (34) is fixedly communicated with the top surface of the air-vent ring pipe (32), an air duct is rotationally communicated with the upper part of the condensing coil (33), one end of an air outlet of the air duct (34) is fixedly communicated with the air duct, a refined milk outlet is fixedly formed in the bottom end of the condensing coil (33), and a cooling water inlet pipe (35) and a heat exchange water outlet pipe (36) which are respectively mounted on the outer part of the tower body (1) and communicated with the condensing cavity (30).
6. The energy-saving and environment-friendly rectifying tower for improving the purity of lactic acid according to claim 5, wherein the servo motor (4) is a double-headed motor, the top of the tower body (1) is rotationally connected with a differential shaft (37), the differential shaft (37) is driven by the servo motor (4), and the peripheral side surface of the differential shaft (37) is respectively in transmission connection with a rotating shaft (16) and a condensing coil (33) through chains.
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| CN102989322B (en) * | 2011-09-16 | 2014-10-29 | 中国科学院生态环境研究中心 | Flat plate type membrane assembly for microwave vacuum membrane distillation operation |
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| CN110292861B (en) * | 2019-06-04 | 2021-07-30 | 常州大学 | Membrane module flushing device for treating hydrogen sulfide desulfurization solution through membrane distillation |
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