阅读说明：本技术 一种低灰分的猪血浆蛋白粉的制备工艺及其装置 (Preparation process and device of low-ash porcine plasma protein powder ) 是由 吴明华 许剑 钱程 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种低灰分的猪血浆蛋白粉的制备工艺及其装置,包括以下步骤S01使用一级离心机对猪血进行离心分离,S02使用分离机对离心分离后的猪血进行血浆分离,S03使用二级离心机对血浆进行充分离心分离,S04对充分离心分离后的血浆进行低温加热,对低温加热后的血浆进行超滤浓缩,S05将超滤浓缩后的血浆进行喷雾干燥,S06将喷雾干燥后的血浆粉末维持干燥,S07对维持干燥后的蛋白粉进行色度振筛,使蛋白粉的色度保持在标准线上,本发明中,通过一集离心分离、分离机分离,二级离心分离可以充分的将血浆蛋白从血液中分离出来,通过超滤浓缩可以充分提高血浆蛋白的纯度,并且降低血浆蛋白粉的灰度,通过喷雾干燥可以使血浆蛋白粉呈均匀的粉末状。(The invention discloses a preparation process of low-ash pig plasma protein powder and a device thereof, which comprises the following steps of S01, using a primary centrifuge to centrifugally separate pig blood, S02, using a separator to separate the plasma of the centrifugally separated pig blood, S03, using a secondary centrifuge to fully centrifugally separate the plasma, S04, carrying out low-temperature heating on the fully centrifugally separated plasma, carrying out ultrafiltration concentration on the plasma after low-temperature heating, S05, carrying out spray drying on the plasma after ultrafiltration concentration, S06, maintaining the plasma powder after spray drying, and S07, carrying out chroma vibration screening on the protein powder after maintenance drying, so that the chroma of the protein powder is kept on a standard line. And the gray level of the plasma protein powder is reduced, and the plasma protein powder can be in a uniform powder shape through spray drying.)

1. A preparation process of low-ash pig plasma protein powder and a device thereof comprise the following steps:

step S01, using a primary centrifuge (2) to centrifugally separate the pig blood;

step S02, using a separator (4) to carry out plasma separation on the centrifuged pig blood;

step S03 is to fully centrifuge and separate the plasma by using a secondary centrifuge (5);

step S04, low-temperature heating is carried out on the plasma after full centrifugal separation, and ultrafiltration concentration is carried out on the plasma after low-temperature heating;

step S05 spray drying the plasma after ultrafiltration concentration;

step S06 keeping the plasma powder after spray drying dry;

and step S07, carrying out chroma vibration screening on the dried protein powder to keep the chroma of the protein powder on a standard line.

2. The preparation process of low-ash porcine plasma protein powder and the device thereof according to claim 1, which comprises a base (1), and is characterized in that: the base (1) is fixedly arranged on one side of the top end of the primary centrifugal machine (2), the primary centrifugal machine (2) is fixedly arranged on the top end of the primary centrifugal machine (21), the primary centrifugal machine (2) is movably arranged inside the primary centrifugal machine (23), the primary centrifugal machine (2) is fixedly arranged on the bottom end of the primary centrifugal machine (23), the primary centrifugal machine is fixedly arranged on the discharge port (23) of the primary centrifugal machine (4), the separation membrane (41) is fixedly arranged inside the separation machine, the separator (4) is fixedly connected with the secondary centrifugal machine (5) through the feeding pump (3), the secondary centrifugal machine (5) is movably arranged inside the secondary centrifugal machine (51), the secondary centrifugal machine is fixedly connected with the ultrafiltration concentrator (6) through the feeding pump (3) in the middle of the bottom end of the secondary centrifugal machine (51), the top end of the inner cavity of the ultrafiltration concentrator (6) is fixedly installed with the feeding main pipe (61), the bottom end of the feeding main pipe (61) is fixedly installed with a plurality of feeding branch pipes (62), the bottom end of the feeding branch pipes (62) is fixedly installed with the ultrafiltration concentrator pipe (63), the bottom end of the ultrafiltration concentrator pipe (63) is fixedly installed with the discharging branch pipes (64), the bottom end of the discharging branch pipes (64) is fixedly installed with the discharging main pipe (65), the middle of the inner cavity of the ultrafiltration concentrator pipe (63) is fixedly installed with the filter pipes (67), the outer surfaces of the filter pipes (67) are uniformly installed with the heating wires (66), the two sides of the discharging branch pipes (65) are fixedly installed with the water outlets (68), the bottom end of the ultrafiltration concentrator (6) is fixedly connected with the spray dryer (7) through the feeding pump (3), and the top of the inner cavity of the spray dryer (7, the inner cavity of the spray dryer (7) is fixedly arranged on two sides of the partition plate (74), the inner side of the partition plate (74) is fixedly arranged on the heating plate (73), one side of the inner cavity of the spray dryer (7) is fixedly arranged on the separator (71), the bottom end of the spray dryer (7) is fixedly connected with the heating bin (8) through the feed pump (3), the top end of the inner cavity of the heating bin (8) is fixedly arranged on the heater (81), the bottom end of the heating bin (8) is fixedly connected with the sieving machine (9) through the feed pump (3), two sides of the top of the inner cavity of the sieving machine (9) are fixedly arranged on the scanning plate support (93), one end of the scanning plate support (93), which is far away from the inner surface of the sieving machine (9), is fixedly arranged on the scanning plate (91), the bottom end of the scanning plate (91) is movably connected with the movable isolation plate (92), and the finished product cover (94) is, the middle of the finished product cover (94) is provided with the finished product inlet (95).

3. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: and S01, adding the pig blood into the primary centrifuge rotor (22) through the primary centrifuge feed inlet (21), centrifuging the pig blood by using the primary centrifuge (2), and entering S02 after the separation is finished.

4. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: the plasma after the first-stage centrifugation in the step S02 enters a separator (4) through a feeding pump (3), the pig blood after the first-stage centrifugation is subjected to plasma separation by the separator (4), the plasma substance with higher density is separated by the separator (4) through precipitation separation, and the separated plasma substance enters the step S03.

5. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: and S03, fully centrifuging the plasma by using a two-stage centrifuge (5), feeding the fully centrifuged plasma into an ultrafiltration concentrator (6) through a feeding pump (3), and then feeding the plasma into S04.

6. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: the step S04 is that when the plasma enters the ultrafiltration concentration pipe (63), the heating wire (66) heats the plasma in the ultrafiltration concentration pipe (63) for the first time, the temperature is kept at 30 ℃, the time lasts for 20 minutes, the heated plasma filters out the internal water and substances influencing the protein color through the filter pipe (67), and the concentration of the protein in the plasma is increased, and the step S05 is carried out after the ultrafiltration concentration is finished.

7. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: the plasma after ultrafiltration concentration in the step S06 enters a spray head (72) through a feeding pump (3), the plasma is sprayed into a mist shape through the spray head (72), a heating plate (73) is used for drying the plasma, and simultaneously, the moisture dried by the separator (71) is pumped out of a spray dryer (7), and the temperature of the heating plate is kept at 210 ℃. The time lasts for 1.5-2 minutes, the dried protein powder enters a heating bin (8) through a feeding pump (3), and the step S06 is carried out.

8. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: and S06, keeping the temperature of the heating bin at 85 ℃, keeping the heating time at 3 minutes, feeding the heated protein powder into a vibrating screen (9) through a feeding pump (3), and then, feeding into S07.

9. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 1 are characterized in that: and in the step S07, a scanning plate (91) is arranged in the vibrating screen (9) to scan the whiteness of the protein powder entering the vibrating screen (9), the protein powder with the whiteness reaching the standard naturally enters a finished product bin through a finished product inlet (95) through a movable isolation plate (92), and the protein powder without the whiteness standard is processed again, so that the chromaticity of the protein powder is kept on a standard line.

10. The preparation process and the device of the low-ash porcine plasma protein powder according to claim 2 are characterized in that: the discharging pipe (31) is fixedly installed on one side of the feeding pump (3), and the feeding pipe (32) is fixedly installed on one side, far away from the discharging pipe (31), of the feeding pump (3).

Technical Field

The invention belongs to the field of biological resource production, and particularly relates to a preparation process and a preparation device of low-ash porcine plasma protein powder.

Background

The pig blood protein powder is a novel biological protein substance produced by utilizing blood resources in modern society, the domestic preparation of plasma protein is in the middle level of the world, the plasma protein can not be well utilized, and has great defects on the processing production of plasma protein, such as the processing of plasma, namely whole blood drying, has great nutritional defects, and adding a large amount of anticoagulant in the raw material collection process to prevent blood coagulation, so that the ash content of the plasma protein powder is high, low protein content, poor solubility, low total quality and the like, and particularly, the color of the plasma protein can not reach the normal standard, so that the application range of the plasma protein is greatly reduced, thus wasting huge pig blood resources in China, causing great loss of national invisible economy, therefore, in order to solve the problems, the preparation process of the low-ash porcine plasma protein powder and the device thereof are provided.

Disclosure of Invention

The present invention provides a solution to the above problem of xxxxx.

The invention is realized in this way, a preparation method and its apparatus of low-ash pig plasma protein powder, including the following steps:

step S01, using a primary centrifuge to centrifugally separate the pig blood;

step S02 is to perform plasma separation on the centrifuged pig blood using a separator;

step S03 is to fully centrifuge the plasma using a secondary centrifuge;

step S04, low-temperature heating is carried out on the plasma after full centrifugal separation, and ultrafiltration concentration is carried out on the plasma after low-temperature heating;

step S05 spray drying the plasma after ultrafiltration concentration;

step S06 keeping the plasma powder after spray drying dry;

and step S07, carrying out chroma vibration screening on the dried protein powder to keep the chroma of the protein powder on a standard line.

A preparation process and a device of low-ash pig plasma protein powder comprise a base, wherein one side of the top end of the base is fixedly provided with a primary centrifugal machine, the top end of the primary centrifugal machine is fixedly provided with a feed inlet of the primary centrifugal machine, the primary centrifugal machine is movably provided with a rotor of the primary centrifugal machine, the bottom end of the primary centrifugal machine is fixedly provided with a discharge outlet of the primary centrifugal machine, the discharge outlet of the primary centrifugal machine is fixedly connected with a separator through a feed pump, the separator is fixedly provided with a separation diaphragm, the bottom end of the separator is fixedly connected with a secondary centrifugal machine through the feed pump, the secondary centrifugal machine is movably provided with the rotor of the secondary centrifugal machine, the middle of the bottom end of the rotor of the secondary centrifugal machine is fixedly connected with an ultrafiltration concentrator through the feed pump, the, the bottom of the feeding main pipe is fixedly provided with a plurality of feeding branch pipes, the bottom of each feeding branch pipe is fixedly provided with an ultrafiltration concentration pipe, the bottom of each ultrafiltration concentration pipe is fixedly provided with a discharge branch pipe, the bottom of each discharge branch pipe is fixedly provided with a discharge main pipe, the middle of the inner cavity of each ultrafiltration concentration pipe is fixedly provided with a filter pipe, the outer surface of each filter pipe is uniformly provided with the heating wire, the two sides of each discharge branch pipe are fixedly provided with the water outlets, the bottom of each ultrafiltration concentration machine is fixedly connected with the spray dryer through a feeding pump, the top of the inner cavity of the spray dryer is fixedly provided with the spray head, the two sides of the inner cavity of the spray dryer are fixedly provided with the partition plates, the inner sides of the partition plates are fixedly provided with the heating plates, one side of the inner cavity of the spray dryer is fixedly provided, the heating chamber inner chamber top fixed mounting the heater, the heating chamber bottom is through delivery pump fixed connection the sieving machine, sieving machine inner chamber top both sides fixed mounting the scanning board support, the scanning board support is kept away from the one end fixed mounting of sieving machine internal surface the scanning board, scanning board bottom swing joint the movable isolation board, fixed mounting in the middle of the sieving machine inner chamber the finished product lid, it has to open in the middle of the finished product lid the finished product import.

Further, in the step S01, the pig blood is added into the rotor of the primary centrifuge through the feed inlet of the primary centrifuge, the primary centrifuge is used for centrifugal separation of the pig blood, and the step S02 is performed after the separation is completed.

Further, the plasma after the primary centrifugation in the step S02 is fed into a separator through a feed pump, the plasma of the pig blood after the primary centrifugation is separated by the separator, the plasma substance with a high density is separated by the separator through precipitation by using a precipitation separation method, and the separated plasma substance is fed into the step S03.

Further, the step S03 is to fully centrifuge the plasma by using a two-stage centrifuge, and the fully separated plasma is fed into the ultrafiltration concentrator by the feeding pump, and then the step S04 is performed.

Further, in step S04, when the plasma enters the ultrafiltration concentration tube, the heating wire heats the plasma in the ultrafiltration concentration tube for the first time, the temperature is maintained at 30 ℃, the time lasts for minutes, the heated plasma filters out the water and substances affecting the protein color inside through the filter tube, and the concentration of the protein in the plasma is increased, and the step S05 is performed after the ultrafiltration concentration is completed.

Further, the plasma after ultrafiltration concentration in step S06 is fed into a nozzle through a feeding pump, the plasma is sprayed out through the nozzle to be atomized, the plasma is dried by a heating plate, and the water dried by the separator is pumped out of the spray dryer, and the temperature of the heating plate is kept at 210 ℃. The time lasts for 1.5-2 minutes, the dried protein powder enters a heating bin through a feeding pump, and the step S06 is carried out.

Further, the temperature of the heating bin is kept at 5 ℃ in the step S06, the heating time is 3 minutes, and after heating is completed, the protein powder enters a vibrating screen machine through a feeding pump and enters the step S07.

Further, a scanning plate is installed in the step S07, and the whiteness of the protein powder entering the sieving machine is scanned, the protein powder with the whiteness reaching the standard naturally enters the finished product bin through the movable isolation plate through the finished product inlet, and the protein powder without the whiteness standard is processed again, so that the chromaticity of the protein powder is kept on the standard line.

Furthermore, the discharge pipe is fixedly installed on one side of the feeding pump, and the feeding pipe is fixedly installed on one side, far away from the discharge pipe, of the feeding pump.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the plasma subjected to sufficient centrifugal separation can be ensured not to contain other substances except plasma protein, the water in the plasma can be partially evaporated by primary heating, so that the subsequent ultrafiltration concentration is smoother, colored substances in the plasma can be removed by ultrafiltration concentration, the pig blood protein powder is kept at higher whiteness, the pig blood protein powder is made into uniform powdery substances by spray drying, the quality of the pig blood protein powder can be ensured, and the whole production process can be seamlessly connected through the feeding pump.

Drawings

FIG. 1 is a process flow diagram of a preparation process of low-ash porcine plasma protein powder and a device thereof;

FIG. 2 is a schematic view of the preparation process of low-ash porcine plasma protein powder and the shell structure of the device thereof;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 illustrating the process and apparatus for preparing low ash porcine plasma protein powder of the present invention;

FIG. 4 is an enlarged schematic view of the structure at B in FIG. 2 illustrating the process and apparatus for preparing low ash porcine plasma protein powder of the present invention;

FIG. 5 is an enlarged schematic view of the structure at C in FIG. 2 illustrating the process and apparatus for preparing low ash porcine plasma protein powder of the present invention;

FIG. 6 is an enlarged view of the process and apparatus for preparing low-ash porcine plasma protein powder of the present invention, and the structure of the ultrafiltration concentration tube in FIG. 2.

In the figure: 1. a base; 2. a primary centrifuge; 21. a feed inlet of a primary centrifuge; 22. a primary centrifuge rotor; 23. a discharge port of a first centrifuge; 3. a feed pump; 31. a discharge pipe; 32. a feed pipe; 4. a separator; 41. a separation membrane; 5. a secondary centrifuge; 51. a secondary centrifuge rotor; 6. an ultrafiltration thickener; 61. a feeding main pipe; 62. feeding and pipe distribution; 63. an ultrafiltration concentration tube; 64; a discharge main pipe 65 and discharge branch pipes; 66. heating wires; 67. a filter tube; 68. a water outlet; 7. a spray dryer; 71. a separator; 72. a spray head; 73. heating plates; 74. a partition plate; 8. a heating chamber; 81. a heater; 9. a vibrating screen machine; 91. a scanning plate; 92. a movable isolation plate; 93. a scan plate support; 94. a finished product cover; 95. and (6) finished product import.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-6, a process for preparing low-ash porcine plasma protein powder and an apparatus thereof includes the following steps:

step S01, using a primary centrifuge 2 to centrifugally separate the pig blood;

step S02 is to perform plasma separation on the centrifuged pig blood using the separator 4;

step S03 is to fully centrifuge the plasma using the secondary centrifuge 5;

step S04, low-temperature heating is carried out on the plasma after full centrifugal separation, and ultrafiltration concentration is carried out on the plasma after low-temperature heating;

step S05 spray drying the plasma after ultrafiltration concentration;

step S06 keeping the plasma powder after spray drying dry;

and step S07, carrying out chroma vibration screening on the dried protein powder to keep the chroma of the protein powder on a standard line.

A preparation process of low-ash pig plasma protein powder and a device thereof comprise a base 1, wherein one side of the top end of the base 1 is fixedly provided with a primary centrifugal machine 2, the top end of the primary centrifugal machine 2 is fixedly provided with a primary centrifugal machine feed inlet 21, the inside of the primary centrifugal machine 2 is movably provided with a primary centrifugal machine rotor 23, the bottom end of the primary centrifugal machine 2 is fixedly provided with a primary centrifugal machine discharge outlet 23, the primary centrifugal machine discharge outlet 23 is fixedly connected with a separator 4 through a feed pump 3, the inside of the separator is fixedly provided with a separation membrane 41, the bottom end of the separator 4 is fixedly connected with a secondary centrifugal machine 5 through the feed pump 3, the inside of the secondary centrifugal machine 5 is movably provided with a secondary centrifugal machine rotor 51, the middle of the bottom end of the secondary centrifugal machine rotor 51 is fixedly connected, the top end of the inner cavity of the ultrafiltration concentrator 6 is fixedly provided with the feeding main pipe 61, the bottom end of the feeding main pipe 61 is fixedly provided with a plurality of feeding branch pipes 62, the bottom end of each feeding branch pipe 62 is fixedly provided with the ultrafiltration concentrator 63, the bottom end of the ultrafiltration concentrator 63 is fixedly provided with the discharging branch pipe 64, the bottom end of each discharging branch pipe 64 is fixedly provided with the discharging main pipe 65, the middle of the inner cavity of the ultrafiltration concentrator 63 is fixedly provided with the filter pipe 67, the outer surface of the filter pipe 67 is uniformly provided with the heating wire 66, the two sides of the discharging branch pipe 65 are fixedly provided with the water outlet 68, the bottom end of the ultrafiltration concentrator 6 is fixedly connected with the spray dryer 7 through the feeding pump 3, the top of the inner cavity of the spray dryer 7 is fixedly provided with the spray head 72, the two sides of the inner cavity of the spray dryer 7 are fixedly provided with the, 7 inner chamber one side fixed mounting of spray dryer separator 71, 7 bottoms of spray dryer pass through feed pump 3 fixed connection heating chamber 8, 8 inner chamber top fixed mounting of heating chamber heater 81, 3 fixed connection of feed pump are passed through to 8 bottoms of heating chamber the sieving machine 9, 9 inner chamber tops both sides fixed mounting of sieving machine scan board support 93, the one end fixed mounting of sieving machine 9 internal surface is kept away from to scan board support 93 scan board 91, scan board 91 bottom swing joint movable separator 92, fixed mounting in the middle of the sieving machine 9 inner chamber finished product lid 94, open in the middle of the finished product lid 94 finished product import 95.

In the invention, the pig blood is added into the primary centrifuge rotor 22 through the primary centrifuge inlet 21 in the step S01, the primary centrifuge 2 is used for carrying out centrifugal separation on the pig blood, and the step S02 is carried out after the separation is finished.

In the present invention, the plasma after the primary centrifugation in step S02 is introduced into the separator 4 through the feed pump 3, the pig blood after the primary centrifugation is subjected to plasma separation using the separator 4, the plasma substance having a relatively high density is separated by precipitation using the separator 4, and the separated plasma substance is introduced into step S03.

In the present invention, the plasma is fully centrifuged in the step S03 by using the two-stage centrifuge 5, and the fully centrifuged plasma enters the ultrafiltration concentrator 6 through the feeding pump 3, and then enters the step S04, so that the fully centrifuged plasma is ensured to contain no other substances except plasma protein.

In the invention, when the plasma enters the ultrafiltration concentration pipe 63 in the step S04, the heating wire 66 primarily heats the plasma in the ultrafiltration concentration pipe 63, the temperature is kept at 30 ℃, the time lasts for 20 minutes, the heated plasma filters out the internal water and substances influencing the protein color through the filter pipe 67, and the concentration of the protein in the plasma is improved, when the ultrafiltration concentration is completed, the step S05 is carried out, the primary heating can evaporate part of the water in the plasma, so that the subsequent ultrafiltration concentration is carried out more smoothly, the ultrafiltration concentration can remove the colored substances in the plasma, and the porcine blood protein powder can keep higher whiteness.

In the present invention, the plasma after ultrafiltration concentration in step S06 is fed into the nozzle 72 through the feed pump 3, sprayed in mist form through the nozzle 72, and dried by the heating plate 73, and the water dried by the separator 71 is pumped out of the spray dryer 7, and the temperature of the heating plate is maintained at 210 ℃. The time lasts for 1.5-2 minutes, the dried protein powder enters a heating bin 8 through a feeding pump 3, and the step S06 is carried out, and the pig blood protein powder is made into uniform powdery substances through spray drying.

In the invention, the temperature of the heating bin is kept at 85 ℃ in the step S06, the heating time is 3 minutes, and after the heating is finished, the protein powder enters a sieving machine 9 through a feeding pump 3 and then enters the step S07.

In the invention, the scanning plate 91 is arranged in the sieving machine 9 in the step S07 to scan the whiteness of the protein powder entering the sieving machine 9, the protein powder with the whiteness reaching the standard naturally enters the finished product bin through the finished product inlet 95 through the movable isolation plate 92, and the protein powder without the whiteness standard is processed again, so that the chromaticity of the protein powder is kept on the standard line, and the quality of the pig blood protein powder can be ensured.

In the invention, the discharge pipe 31 is fixedly arranged on one side of the feeding pump 3, the feeding pipe 32 is fixedly arranged on one side of the feeding pump 3 far away from the discharge pipe 31, and the whole production process can be connected seamlessly through the feeding pump 3.

The working principle of the invention is as follows:

firstly, pig blood is added into a rotor 22 of a primary centrifuge through a feed inlet 21 of the primary centrifuge, the pig blood is centrifugally separated by using a primary centrifuge 2, when the separated plasma enters a separator 4 through a feed pump 3, the pig blood after the primary centrifugal separation is subjected to plasma separation by using the separator 4, plasma substances with higher density are separated by using a precipitation separation method through the separator 4, the separated plasma substances enter a secondary centrifuge 5 to fully centrifugally separate the plasma, the fully separated plasma enters an ultrafiltration concentrator 6 through the feed pump 3, when the plasma enters an ultrafiltration concentration pipe 63, the plasma in the ultrafiltration concentration pipe 63 is primarily heated by a heating wire 66, the temperature is kept at 30 ℃, the time lasts for 20 minutes, the heated plasma filters out water and substances influencing protein color through a filter pipe 67, and the concentration of protein in the plasma is increased, then the plasma after ultrafiltration concentration enters a spray head 72 through a feeding pump 3, the plasma is sprayed into a mist shape through the spray head 72, the plasma is dried by using a heating plate 73, and simultaneously the moisture dried by the separator 71 is pumped out of a spray dryer 7, and the temperature of the heating plate is kept at 210 ℃. The time lasts for 1.5-2 minutes, the dried protein powder enters a heating bin 8 through a feeding pump 3, the temperature of the heating bin is kept at 85 ℃, the heating time is 3 minutes, the heated protein powder enters a vibrating screen machine 9 through the feeding pump 3, then a scanning plate 91 is used for scanning the whiteness of the protein powder entering the vibrating screen machine 9, the protein powder with the standard whiteness naturally enters a finished product bin through a movable isolation plate 92, the protein powder does not pass the whiteness standard, the protein powder is processed again, and the chromaticity of the protein powder is kept on a standard line.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.