阅读说明：本技术 一种固体乳酸的制备方法 (Preparation method of solid lactic acid ) 是由 殷玲 孔瑞扬 华雅晴 于 2020-07-15 设计创作，主要内容包括：本发明涉及乳酸制备领域,具体的说是一种固体乳酸的制备方法,该制备方法中所使用反应釜,包括装置主体、支撑机构、出料管、进料机构、进料管、套管、密封塞、通槽、推块、搅拌机构、过滤机构、固定框和滤网,本发明当物料在装置主体的内部进行发酵的过程中,使用者可手动将密封塞进行按压,则密封塞带动套管朝底部移动,则套管移动带动推块同时移动,当推块朝底部移动时,会不断的将位于进料管内腔中的密封液油进行挤压,密封液油受到挤压后,就会通过通槽被挤出,则密封液油就会不断的被排入至进料管和套管之间,当套管完全滑进进料管内部后,密封液油也会逐渐的将密封塞进行淹没,从而在使用时能够保证装置主体内部良好的密封性。(The invention relates to the field of lactic acid preparation, in particular to a preparation method of solid lactic acid, wherein a reaction kettle used in the preparation method comprises a device main body, a supporting mechanism, a discharge pipe, a feeding mechanism, a feeding pipe, a sleeve pipe, a sealing plug, a through groove, a push block, a stirring mechanism, a filtering mechanism, a fixing frame and a filter screen, when materials are fermented in the device main body, a user can manually press the sealing plug, the sealing plug drives the sleeve pipe to move towards the bottom, the sleeve pipe moves to drive the push block to move simultaneously, when the push block moves towards the bottom, sealing liquid oil in an inner cavity of the feeding pipe can be continuously extruded, the sealing liquid oil can be extruded through the through groove after being extruded, the sealing liquid oil can be continuously discharged between the feeding pipe and the sleeve pipe, and when the sleeve pipe completely slides into the feeding pipe, the sealing liquid oil can gradually submerge the sealing plug, thereby ensuring good sealing performance inside the device main body when in use.)

1. A preparation method of solid lactic acid is characterized in that: the preparation method comprises the following steps:

s1: accurately weighing corn and sweet potato starch raw materials, wherein the ratio is required to be 1:1, then adding the weighed corn starch raw materials and sweet potato starch raw materials into a pretreatment device, adding water for cooking, and fully stirring after cooking to obtain a raw material mixture;

s2: then adding the raw material mixture obtained in the step S1 into a fermentation tank, simultaneously uniformly scattering lactic acid bacteria into the fermentation tank, and stirring while scattering, so that the lactic acid bacteria are fully and uniformly mixed with the raw material mixture;

s3: controlling the fermentation temperature to be 50 ℃, controlling the canning amount in the fermentation tank to be about 80%, controlling the pH to be 5.5-6.5 in the fermentation process, fully sealing, stirring by a stirring mechanism in the fermentation tank in the fermentation process, removing carbon dioxide generated by fermentation, promoting heat dissipation and homogenizing a fermentation solution, and obtaining a lactic acid stock solution after the fermentation is finished;

S4: adding the lactic acid stock solution obtained in the step S3 into a reaction kettle, simultaneously adding calcium lactate and fine silicon dioxide into the reaction kettle, heating to 85 ℃, fully mixing, and obtaining solid lactic acid after curing;

wherein reation kettle who uses in S4, including device main part (1), its characterized in that: the device is characterized in that a supporting mechanism (2) is arranged at the bottom of the device main body (1), a discharging pipe (3) is arranged at the bottom of the device main body (1), a feeding mechanism (4) is arranged on one side of the top of the device main body (1), the feeding mechanism (4) comprises a feeding pipe (41), a sleeve (42), a sealing plug (43), a through groove (45) and a pushing block (47), the feeding pipe (41) is fixed on one side of the top of the device main body (1), the sleeve sealing plug (42) is clamped in a side wall inner cavity of the feeding pipe (41) through the pushing block (47), the top end of the sleeve (42) is clamped with the sealing plug (43), the top end and the bottom of the side wall inner cavity of the feeding pipe (41) are communicated through the through groove (45), a stirring mechanism (5) is arranged in the device main body (1), and a filtering mechanism (6), filtering mechanism (6) are including fixed frame (61) and filter screen (62), be located on the inner wall of device main part (1) the bottom of rabbling mechanism (5) is equipped with fixed frame (61), the inside of fixed frame (61) is equipped with filter screen (62).

2. The method for preparing solid lactic acid according to claim 1, wherein: supporting mechanism (2) are including the lantern ring (21) and vaulting pole (22), cup joint on the bottom lateral wall of device main part (1) the lantern ring (21), be evenly fixed with threely on the lantern ring (21) vaulting pole (22).

3. The method for preparing solid lactic acid according to claim 1, wherein: feed mechanism (4) still include closing cap (44), be equipped with on the lateral wall that feed pipe (41) are close to the top closing cap (44), just closing cap (44) are the cake form.

4. The method for preparing solid lactic acid according to claim 1, wherein: the feeding mechanism (4) further comprises a clamping block (46), the feeding pipe (41) is fixedly provided with the clamping block (46) on the inner wall of the cavity at the position where the pushing block (47) is clamped, and the clamping block (46) is clamped on the side wall of the pushing block (47).

5. The method for preparing solid lactic acid according to claim 1, wherein: rabbling mechanism (5) include motor (51), bull stick (52), first stirring rake (53) and second stirring rake (55), install at the top of device main part (1) motor (51), the bottom of motor (51) is rotated and is connected with bull stick (52), bull stick (52) link up the top of device main part (1) extends to the inside of device main part (1), bull stick (52) are in lateral wall in device main part (1) inner chamber is fixed with first stirring rake (53) with second stirring rake (55), just first stirring rake (53) with the helical direction of second stirring rake (55) is opposite.

6. The method for preparing solid lactic acid according to claim 5, wherein: rabbling mechanism (5) still include fixed block (54), connecting rod (56) and scraper blade (57), the middle part of bull stick (52) is fixed with fixed block (54), the both sides of fixed block (54) are fixed with one respectively connecting rod (56), the other end of connecting rod (56) is connected with scraper blade (57), scraper blade (57) contradict in the inner wall of device main part (1).

7. The method for preparing solid lactic acid according to claim 1, wherein: filtering mechanism (6) still include spring (63), the bottom of fixed frame (61) both sides is fixed with one respectively spring (63), the bottom of spring (63) connect in on the inner wall of device main part (1).

Technical Field

The invention relates to the field of lactic acid preparation, in particular to a preparation method of solid lactic acid.

Background

Lactic acid (IUPAC scientific name: 2-hydroxypropionic acid) is a compound that plays a role in a variety of biochemical processes. It is a carboxylic acid with the molecular formula C3H6O 3. Lactic acid can be produced by chemical or microbial fermentation processes. The fermentation method mainly utilizes microorganisms to carry out anaerobic fermentation on carbohydrates (such as sucrose or starch sugar) to generate acid.

When the lactic acid is prepared by a fermentation method, the preparation device needs to be well sealed because the preparation is carried out under the anaerobic condition, however, when the existing equipment is used, the existing equipment still has a gap due to the fact that materials need to be added in the preparation process, and the fermentation process of the lactic acid is influenced because the gap is still left in the sealing; meanwhile, some impurities are generated in the preparation process, and the lactic acid product is influenced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a preparation method of solid lactic acid.

The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of solid lactic acid comprises the following steps:

s1: accurately weighing corn and sweet potato starch raw materials, wherein the ratio is required to be 1:1, then adding the weighed corn starch raw materials and sweet potato starch raw materials into a pretreatment device, adding water for cooking, and fully stirring after cooking to obtain a raw material mixture;

S2: then adding the raw material mixture obtained in the step S1 into a fermentation tank, simultaneously uniformly scattering lactic acid bacteria into the fermentation tank, and stirring while scattering, so that the lactic acid bacteria are fully and uniformly mixed with the raw material mixture;

s3: controlling the fermentation temperature to be 50 ℃, controlling the canning amount in the fermentation tank to be about 80%, controlling the pH to be 5.5-6.5 in the fermentation process, fully sealing, stirring by a stirring mechanism in the fermentation tank in the fermentation process, removing carbon dioxide generated by fermentation, promoting heat dissipation and homogenizing a fermentation solution, and obtaining a lactic acid stock solution after the fermentation is finished;

s4: adding the lactic acid stock solution obtained in the step S3 into a reaction kettle, simultaneously adding calcium lactate and fine silicon dioxide into the reaction kettle, heating to 85 ℃, fully mixing, and obtaining solid lactic acid after curing;

wherein the reaction kettle used in S4 comprises a device main body, the bottom of the device main body is provided with a supporting mechanism, a discharge pipe is arranged at the bottom of the device main body, a feeding mechanism is arranged at one side of the top of the device main body, the feeding mechanism comprises a feeding pipe, a sleeve, a sealing plug, a through groove and a pushing block, the feeding pipe is fixed on one side of the top of the device main body, the sleeve is clamped in the inner cavity of the side wall of the feeding pipe through the push block, the sealing plug is clamped at the top end of the sleeve, the top end and the bottom of the inner cavity of the side wall of the feeding pipe are communicated through the through groove, a stirring mechanism is arranged in the device body, the inner wall of the device main body is provided with a filtering mechanism which comprises a fixed frame and a filter screen, the device is characterized in that the inner wall of the device main body is provided with the fixing frame at the bottom of the stirring mechanism, and the filter screen is arranged inside the fixing frame.

Preferably, in order to conveniently play the fixed support effect to the device main part when using, supporting mechanism includes the lantern ring and vaulting pole, cup joint on the bottom lateral wall of device main part the lantern ring, be evenly fixed with three on the lantern ring the vaulting pole.

Preferably, in order to be convenient when using right the inside sealed fluid that adds of lateral wall of inlet pipe, feed mechanism still includes the closing cap, the inlet pipe is close to and is equipped with on the lateral wall on top the closing cap, just the closing cap is the cake form.

Preferably, in order to conveniently fix the pushing block in a non-use state when the feeding mechanism is used, the feeding mechanism further comprises a fixture block, the fixture block is fixed on the inner wall of the cavity where the pushing block is clamped on the feeding pipe, and the fixture block is clamped on the side wall of the pushing block.

Preferably, in order to advance the effect of stirring to the material when using, rabbling mechanism includes motor, bull stick, first stirring rake and second stirring rake, install at the top of device main part the motor, the bottom of motor is rotated and is connected with the bull stick, the bull stick link up the top of device main part extends to the inside of device main part, the bull stick is in lateral wall in the device main part inner chamber is fixed with first stirring rake with the second stirring rake, just first stirring rake with the spiral opposite direction of second stirring rake.

Preferably, it is right in order to be convenient when using the material that bonds on the device main part inner wall clears up, rabbling mechanism still includes fixed block, connecting rod and scraper blade, the middle part of bull stick is fixed with the fixed block, the both sides of fixed block are fixed with one respectively the connecting rod, the other end of connecting rod is connected with the scraper blade, the scraper blade contradict in the inner wall of device main part.

Preferably, in order to conveniently make when using the filter screen shakes, filtering mechanism still includes the spring, the bottom of fixed frame both sides is fixed with one respectively the spring, the bottom of spring connect in on the inner wall of device main part.

The invention has the beneficial effects that:

(1) the invention provides a preparation method of solid lactic acid, when the lactic acid is required to be prepared, when materials are fermented in the device main body, a user can manually press a sealing plug, the sealing plug can drive a sleeve to move towards the bottom under pressure, the sleeve moves to drive a push block to move simultaneously, when the push block moves towards the bottom, sealing liquid oil in an inner cavity of a feeding pipe can be continuously extruded, after the sealing liquid oil is extruded, the sealing liquid oil can be continuously discharged between the feeding pipe and the sleeve, and after the sleeve completely slides into the feeding pipe, the sealing liquid oil can gradually submerge the sealing plug, so that good sealing performance in the device main body can be ensured during use, and the anaerobic fermentation process of the lactic acid can be ensured.

(2) The invention provides a preparation method of solid lactic acid, wherein after materials enter the interior of a device main body, a motor is powered on, the motor rotates to drive a rotating rod to rotate, and the rotating rod rotates to drive a first stirring paddle and a second stirring paddle to rotate, so that the materials are stirred, the reaction is more sufficient, and meanwhile, a scraper plate also continuously rotates to scrape the materials adhered to the inner wall of the device main body.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic view of the overall structure of a reaction vessel used in the present invention;

FIG. 3 is a schematic view of the connection structure between the main body and the stirring mechanism shown in FIG. 2;

FIG. 4 is a schematic structural view of the feeding mechanism shown in FIG. 2;

FIG. 5 is an enlarged view of portion A of FIG. 2;

FIG. 6 is an enlarged view of the portion B shown in FIG. 3;

fig. 7 is an enlarged view of the portion C shown in fig. 4.

In the figure: 1. the device comprises a device body, 2, a supporting mechanism, 21, a sleeve ring, 22, a supporting rod, 3, a discharge pipe, 4, a feeding mechanism, 41, a feeding pipe, 42, a sleeve pipe, 43, a sealing plug, 44, a sealing cover, 45, a through groove, 46, a clamping block, 47, a pushing block, 5, a stirring mechanism, 51, a motor, 52, a rotating rod, 53, a first stirring paddle, 54, a fixing block, 55, a second stirring paddle, 56, a connecting rod, 57, a scraping plate, 6, a filtering mechanism, 61, a fixing frame, 62, a filter screen, 63 and a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a method for preparing solid lactic acid includes the following steps:

s1: accurately weighing corn and sweet potato starch raw materials, wherein the ratio is required to be 1:1, then adding the weighed corn starch raw materials and sweet potato starch raw materials into a pretreatment device, adding water for cooking, and fully stirring after cooking to obtain a raw material mixture;

s2: then adding the raw material mixture obtained in the step S1 into a fermentation tank, simultaneously uniformly scattering lactic acid bacteria into the fermentation tank, and stirring while scattering, so that the lactic acid bacteria are fully and uniformly mixed with the raw material mixture;

s3: controlling the fermentation temperature to be 50 ℃, controlling the canning amount in the fermentation tank to be about 80%, controlling the pH to be 5.5-6.5 in the fermentation process, fully sealing, stirring by a stirring mechanism in the fermentation tank in the fermentation process, removing carbon dioxide generated by fermentation, promoting heat dissipation and homogenizing a fermentation solution, and obtaining a lactic acid stock solution after the fermentation is finished;

S4: adding the lactic acid stock solution obtained in the step S3 into a reaction kettle, simultaneously adding calcium lactate and fine silicon dioxide into the reaction kettle, heating to 85 ℃, fully mixing, and obtaining solid lactic acid after curing;

wherein the reaction kettle used in S4 comprises a device main body 1, a supporting mechanism 2 is arranged at the bottom of the device main body 1, a discharge pipe 3 is arranged at the bottom of the device main body 1, a feeding mechanism 4 is arranged at one side of the top of the device main body 1, the feeding mechanism 4 comprises a feeding pipe 41, a sleeve 42, a sealing plug 43, a through groove 45 and a push block 47, the feeding pipe 41 is fixed at one side of the top of the device main body 1, the sleeve 42 is clamped in an inner cavity of a side wall of the feeding pipe 41 through the push block 47, the sealing plug 43 is clamped at the top end of the sleeve 42, the top end and the bottom of the inner cavity of the side wall of the feeding pipe 41 are communicated through the through groove 45, a stirring mechanism 5 is arranged inside the device main body 1, a filtering mechanism 6 is arranged on the inner wall of the device main body 1, the filtering mechanism 6 comprises a fixed frame 61 and a filter screen 62, the fixed frame 61, the filter screen 62 is arranged inside the fixing frame 61.

As a technical optimization scheme of the present invention, the supporting mechanism 2 includes a collar 21 and supporting rods 22, the collar 21 is sleeved on a bottom end side wall of the device main body 1, three supporting rods 22 are uniformly fixed on the collar 21, and in order to conveniently play a role of fixing and supporting the device main body 1 when in use.

As a technical optimization scheme of the present invention, the feeding mechanism 4 further includes a sealing cover 44, the sealing cover 44 is disposed on a side wall of the feeding pipe 41 near the top end, and the sealing cover 44 is in a round cake shape, so that sealing oil is conveniently added into the side wall of the feeding pipe 41 when the feeding mechanism is used, and a good sealing effect is achieved.

As a technical optimization scheme of the present invention, the feeding mechanism 4 further includes a fixture block 46, the fixture block 46 is fixed on an inner wall of a cavity where the pushing block 47 is fastened to the feeding pipe 41, the fixture block 46 is fastened to a side wall of the pushing block 47, and when the feeding mechanism is used, the pushing block 47 is conveniently fixed in a non-use state, so that the overall safety is good.

As a technical optimization scheme of the present invention, the stirring mechanism 5 includes a motor 51, a rotating rod 52, a first stirring paddle 53 and a second stirring paddle 55, the motor 51 is installed on the top of the apparatus main body 1, the rotating rod 52 is rotatably connected to the bottom of the motor 51, the rotating rod 52 penetrates through the top of the apparatus main body 1 and extends to the inside of the apparatus main body 1, the first stirring paddle 53 and the second stirring paddle 55 are fixed to the side wall of the rotating rod 52 in the inner cavity of the apparatus main body 1, and the first stirring paddle 53 and the second stirring paddle 55 have opposite spiral directions, so as to perform a good stirring function on the material.

As a technical optimization scheme of the invention, the stirring mechanism 5 further comprises a fixed block 54, a connecting rod 56 and a scraper 57, the fixed block 54 is fixed in the middle of the rotating rod 52, the connecting rod 56 is fixed on each of two sides of the fixed block 54, the scraper 57 is connected to the other end of the connecting rod 56, the scraper 57 abuts against the inner wall of the device main body 1, the rotating rod 52 is driven by the rotation of the motor 51 to rotate, the rotating rod 52 drives the first stirring paddle 53 and the second stirring paddle 55 to rotate, so that materials are stirred, the reaction is more sufficient, and meanwhile, the scraper 57 continuously rotates to scrape the materials adhered to the inner wall of the device main body 1.

As a technical optimization scheme of the present invention, the filtering mechanism 6 further comprises a spring 63, the springs 63 are respectively fixed at the bottom of the two sides of the fixing frame 61, the bottom end of the spring 63 is connected to the inner wall of the device main body 1, when in use, the filter screen 62 is conveniently shaken to screen out some large-particle impurities, so that the impurities generated in the reaction process can be conveniently removed, and the preparation quality of lactic acid can be improved.

When the device is used, firstly, the device main body 1 is fixedly arranged at a required proper position through the supporting mechanism 2, and the preparation work before the device is used is finished; when lactic acid needs to be prepared, a user opens the sealing plug 43, then raw materials needed for preparing lactic acid are injected into the device main body 1 through the feeding pipe 41 and the sleeve 42, after materials enter the device main body 1, the motor 51 is powered on, the motor 51 rotates to drive the rotating rod 52 to rotate, the rotating rod 52 rotates to drive the first stirring paddle 53 and the second stirring paddle 55 to rotate, so that the materials are stirred, the reaction is more sufficient, meanwhile, the scraper plate 57 also rotates continuously to scrape off the materials adhered to the inner wall of the device main body 1, after fermentation is finished, large-particle impurities are screened out through the filtering action of the filter screen 62, so that the impurities generated in the reaction process are removed conveniently, the preparation quality of lactic acid is improved, and the large-particle impurities are finally discharged through the discharging pipe 3; in the process, when the material is subjected to fermentation reaction in the device main body 1, a user can manually press the sealing plug 43, the sealing plug 43 is pressed to drive the sleeve 42 to move towards the bottom, the sleeve 42 moves to drive the push block 47 to move simultaneously, when the push block 47 moves towards the bottom, the sealing liquid oil in the inner cavity of the feeding pipe 41 can be continuously extruded, after being extruded, the sealing liquid oil can be extruded through the through groove 45, the sealing liquid oil can be continuously discharged between the feeding pipe 41 and the sleeve 42, after the sleeve 42 completely slides into the feeding pipe 41, the sealing liquid oil can also gradually submerge the sealing plug 43, so that the good sealing performance in the device main body 1 can be ensured when the device is used, the anaerobic fermentation process of lactic acid can be ensured, and the whole using process of the device can be finally completed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.