CN103652371A - Particle tryptophan premix and preparation method thereof - Google Patents
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- CN103652371A CN103652371A CN201310672254.3A CN201310672254A CN103652371A CN 103652371 A CN103652371 A CN 103652371A CN 201310672254 A CN201310672254 A CN 201310672254A CN 103652371 A CN103652371 A CN 103652371A
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Abstract
The invention relates to a particle tryptophan premix and a preparation method thereof. The preparation method comprises the following steps: step a, conveying a material solution containing tryptophan into an atomizer of a pelletizing device and introducing compressed air in the atomizer; step b, placing a carrier on the bottom of the pelletizing device and introducing hot air from the bottom of the pelletizing device, wherein the pressure difference in the pelletizing device ranges from minus 4.0 to minus 8.0 kPa. By virtue of the preparation method, a desired particle tryptophan premix can be prepared; the particles are even; meanwhile, steam consumption in the pelletizing process is reduced and the dust in tail gas is reduced; low-cost, low-energy consumption and clean production can be achieved.
Description
Technical field
The present invention relates to a kind of tryptophan premix, particularly a kind of particle tryptophan premix and preparation method thereof, belongs to field of feed.
Background technology
Amino acid has two type of one essential amino acid and nonessential amino acid.Eight kinds of essential amino acids are isoleucines, lysine, leucine, methionine, phenylalanine, valine, threonine and tryptophan.It is not because they are more important that these amino acid are called as essential reason, but organism itself can not produce.Therefore, these amino acid must be supplemented by daily feed.Nonessential amino acid is the amino acid that some organisms can oneself produce, so not necessarily leave no choice but be included in food.
Tryptophan is a kind of essential amino acid.In all amino acid, it is minimum that tryptophan is considered in food content.Although rare, tryptophan regulating animal appetite, maintain the aspects such as body health and play a very important role.
Premix is the abbreviation of additive premix, and it is by one or more microcomponents and carrier or diluent proportioning on request, the osculant compound feed products of making after evenly mixing.Microcomponent comprises the additives such as various trace quantity mineral substance elements, various vitamin, synthesizing amino acid.Carrier is the particulate that can carry or adsorb trace active adding ingredient.
CN102090516 discloses a kind of particle tryptophan premix, but the method does not disclose the technological parameter that affects tryptophan particle in mist projection granulating process, in actual production, if parameter is unreasonable, there will be the problems such as granulation is difficult, granular size is uneven, dust is many.
The preparation parameter that openly how not become output uniform particles during currently available technology is open, be easy to granulation, dust is few.
Prior art discloses following spraying granulation technique:
The 24th 2003 the 3rd phases of volume of < < chemical equipment technology > >, " optimization of fluidized-bed spray granulation parameters of technique process " is for FI-5 fluidized-bed spray granulation machine, by the liquid supply speed (factor A) of adhesive, the temperature of fluidized-bed layer (factor B), the concentration of binder solution (factor C) and four factors of compressed air air pressure (factor D) must be as drawn a conclusion to the impact analysis of granulation result: D, be that liquid supply speed is the strongest on the impact of granulation result, compression gas-pressure is the most weak on the impact of granulation result, the result the best of granulating under the combination condition that is 0.2MPa at liquid supply speed 25ml/min, 55 ℃ of bed temperatures, binder concn 7%, compression gas-pressure.
The 26th 2005 the 3rd phases of volume of < < chemical equipment technology > > " research that fluidized-bed spray granulation technical process is controlled ", fluidized-bed spray granulation technique is disclosed, wherein result of study is: (1), in the nodularization stage, is improved germination speed of fluidization air temperature and declined.(2), at drying stage, can suitably improve the temperature of fluidization air to reduce drying time and intergranular wearing and tearing.(3) when flow stream velocity is higher, particle formation and the speed of growth are very fast, but flow stream velocity rising abrasion of particles also has certain increase, thereby cause drying stage particle diameter to distribute, broaden, and show uniform particles variation.
Chinese patent drug the 33rd the 6th phase of volume of June in 2011, " fluidized bed prilling legal system is for the process parameter optimizing of kouyanqing granules " discloses fluidized bed spray granulation technique: according to technological procedure, load weighted stream cream is added to appropriate binder preparation slurries; Dust bag is installed; glassware resets; open spray-drying pelleting machine preheating; while rising to 80 ℃ to temperature, vacuum sucks and has weighed the solid material of handling well; after boiling mixes, open peristaltic pump, start spraying granulation; every 3 ~ 5min, tremble bag once, the order that research affects sugar-free kouyanqing granules granulating result is by experiment: atomizing pressure > peristaltic pump rotating speed > binder concentration.
According to above-mentioned disclosed spraying granulation method, all cannot realize and prepare tryptophan premix uniform particles, be easy to granulation, and the Dust Capacity of tail gas is few.
Summary of the invention
The object of the present invention is to provide a kind of uniform particles, be easy to the preparation method of the particle tryptophan premix of granulation.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A spray pelleting process for particle tryptophan premix, the method comprises the steps:
Step a. is transported to the feed liquid containing tryptophan in the atomizer of Granulation Equipments, in atomizer, passes into compressed air; Carrier is placed in step b. Granulation Equipments bottom, and Granulation Equipments bottom passes into hot-air; It is characterized in that, in described Granulation Equipments, pressure reduction is-4.0 ~-8.0kPa.
Preferably, in step a with 0.06 ~ 0.20 m
3the flow velocity of/h is transported to the feed liquid containing tryptophan in the atomizer of Granulation Equipments;
Preferably, in step a, in atomizer, pass into 0.15 ~ 0.8MPa compressed air;
Preferably, in step a, compressed air and feed liquid enter atomizer from different pipelines respectively;
Preferably, in step a with 0.06 ~ 0.20 m
3when the flow velocity of/h is transported to the atomizer of Granulation Equipments by the feed liquid containing tryptophan, in atomizer, pass into 0.15 ~ 0.8MPa compressed air;
Preferably, in step b, Granulation Equipments bottom passes into 100 ~ 160 ℃ of hot-airs.
Containing dry biomass concentration in the feed liquid of tryptophan, be wherein 30 ~ 50%;
The described feed liquid containing tryptophan refers to: the mass concentration of tryptophan is 3 ~ 38%, and wherein dry comprises tryptophan and additive; Described additive comprises one or more of mineral element, vitamin, calcium carbonate, starch, corncob, wheat bran, wood chip, zeolite powder, and surplus is water.
Described carrier be in corncob, calcium carbonate, wheat bran, wood chip, zeolite powder any one or a few, this carrier is for atomization granulating.
As preferably, the dry biomass concentration of the feed liquid of described tryptophan is 38 ~ 45%.
As preferably, in described Granulation Equipments, pressure reduction is-5.0 ~-7.0kPa.
As preferably, described hot air temperature is controlled at 120 ~ 140 ℃.
As preferably, described in to pass into compressed-air actuated pressure be 0.2 ~ 0.4MPa.
As preferably, pressure when described feed liquid is transported to atomizer is 0.2 ~ 0.4MPa.
As preferably, described atomizer is two Fluid sprayers.
In granulation process, Granulation Equipments bottom drum has hot-air, and air inducing is arranged at top, is connected with compressed air and input material in atomizer simultaneously, hot-air, air inducing, compressed air, material input, and these factors make the inner pressure reduction that forms of Granulation Equipments.Prior art is not all instructed the mass formation significant impact that in Granulation Equipments, pressure reduction can be prepared particle tryptophan premix, the applicant surprisingly finds: in Granulation Equipments, pressure reduction is-4.0 ~-8.0kPa, can prepare desirable particle tryptophan premix, uniform particles not only, reduce the steam consumption of granulation process simultaneously, and reduce the Dust Capacity that enters tail gas.Realize low cost, low energy consumption, cleaned production.Following experimental example is used for further illustrating technique effect of the present invention, but does not form the restriction of protection domain of the present invention.
Accompanying drawing explanation
Accompanying drawing 1 spray granulating and drying device schematic diagram 1
Description of reference numerals: 1, two Fluid sprayers, 2, feed liquid input channel, 3, compressed air input channel, 4, heater, 5, hot-air air intake, 6, discharging opening, 7, granulating fluidized bed.
Accompanying drawing 2 spray granulating and drying device schematic diagrames 2
Description of reference numerals: 1, two Fluid sprayers, 4, heater, 6, discharge chamber, 7, granulating fluidized bed, 8, ventilation terminal, 9, forge a knife.
The specific embodiment
The drying equipment adopting in following examples (shown in accompanying drawing 1):
Feed liquid is transported to two Fluid sprayers 1 by feed liquid input channel 2, compressed air is transported to two Fluid sprayers 1 by compressed air input channel 3 simultaneously, under compressed air effect, feed liquid is atomized into fine drop, (hot-air enters fluid bed from hot-air air intake 5 to be sprayed on equably the granulating fluidized bed 7 interior crystal grain for fluidized state surfaces, make crystal grain at the bottom of fluid bed in fluidized state), by reunion and coating effect, grow up gradually, be dried jointly the adding under effect of internal heater 4 in hot-air and granulating fluidized bed 7 simultaneously, from 6 dischargings of granulating fluidized bed discharging opening.
Experimental example 1
Experiment material:
Feed liquid 1 forms: containing the mixed liquor of tryptophan 8%, calcium carbonate 18%, starch 10%, moisture 64%.Dry substance concentration is 38% as calculated.
Method: 6 experimental group are set, investigate respectively: the impact of pressure reduction on granularity in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments.
Experimental group 1: with 0.14 m
3the flow velocity of/h is transported to feed liquid 1 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.4MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 160 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 1.
Experimental group 2: with 0.20 m
3the flow velocity of/h is transported to feed liquid 1 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.15MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 100 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.The results are shown in Table 1.
Experimental group 3: with 0.06 m
3the pressure of the flow velocity of/h is transported to feed liquid 1 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.8MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 130 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-5.0kPa.The results are shown in Table 1.
Experimental group 4: with 0.04 m
3the flow velocity of/h is transported to feed liquid 1 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.3MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even corncob and zeolite powder are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 140 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-3.0kPa.The results are shown in Table 1.
Experimental group 5: with 0.16 m
3the flow velocity of/h, by be transported to two Fluid sprayers of Granulation Equipments containing feed liquid 1, meanwhile, passes into 0.9MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 125 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-9.0kPa.。The results are shown in Table 1.
Experimental group 6: with 0.09 m
3the flow velocity of/h is transported to feed liquid 1 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.35MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 1 enter two Fluid sprayers from different pipelines respectively.Even corncob and wood chip are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 80 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-1.8kPa.The results are shown in Table 1.
Result: in Table 1.
The affect result of each factor of table 1 on granularity
Experimental example 2
Experiment material:
Feed liquid 2 forms: containing the mixed liquor of tryptophan 38%, calcium carbonate 5%, starch 7%, moisture 50%, dry substance concentration is 50% as calculated.
Method: 6 experimental group are set, investigate respectively: the impact of pressure reduction on granularity in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments.
Experimental group 7: with 0.14m
3the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.4MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 160 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 2.
Experimental group 8: with 0.20 m
3the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.15MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 100 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.The results are shown in Table 2.
Experimental group 9: with 0.06 m
3the pressure of the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.8MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 130 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.The results are shown in Table 2.
Experimental group 10: with 0.04 m
3the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.3MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even corncob and zeolite powder are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 140 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-3.0kPa.The results are shown in Table 2.
Experimental group 11: with 0.16 m
3the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.9MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 125 ℃ of hot-airs, and in Granulation Equipments, pressure reduction is-9.0kPa.The results are shown in Table 2.
Experimental group 12: with 0.09 m
3the flow velocity of/h is transported to feed liquid 2 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.35MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 2 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 80 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-1.8kPa.The results are shown in Table 2.
Result: in Table 2.
The affect result of each factor of table 2 on granularity
Experimental example 3
Experiment material:
Feed liquid 3 forms: containing the mixed liquor of tryptophan 3%, corncob 15%, zeolite powder 18%, moisture 64%, dry substance concentration is 36% as calculated.
Method: 6 experimental group are set, investigate respectively: the impact of pressure reduction on granularity in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments.
Experimental group 13: with 0.14m
3the flow velocity of/h is transported to feed liquid 3 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.4MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 160 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 3.
Experimental group 14: with 0.2 m
3the flow velocity of/h is transported to feed liquid 3 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.15MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 100 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.The results are shown in Table 3.
Experimental group 15: with 0.06 m
3the pressure of the flow velocity of/h is transported to feed liquid 3 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.8MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even rice bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 130 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-6.0kPa.The results are shown in Table 3.
Experimental group 16: with 0.04 m
3the flow velocity of/h is transported to feed liquid 3 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.3MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even corncob and zeolite powder are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 140 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-9.0kPa.The results are shown in Table 3.
Experimental group 17: with 0.16 m
3the flow velocity of/h, by be transported to two Fluid sprayers of Granulation Equipments containing feed liquid 3, meanwhile, passes into 0.9MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even wheat bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 125 ℃ of hot-airs. and in Granulation Equipments, pressure reduction is-2.0kPa.The results are shown in Table 3.
Experimental group 18: with 0.09 m
3the flow velocity of/h is transported to feed liquid 3 two Fluid sprayers of Granulation Equipments, meanwhile, passes into 0.35MPa compressed air in two Fluid sprayers.Wherein, compressed air and feed liquid 3 enter two Fluid sprayers from different pipelines respectively.Even corncob is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 80 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-2.0kPa.The results are shown in Table 3.
Result: in Table 3.
The affect result of each factor of table 3 on granularity
Embodiment 1
With 0.14 m
3the flow velocity of/h consists of the mixed liquor containing tryptophan 25%, calcium carbonate 5%, sodium carboxymethylcellulose 10% by feed liquid 4(feed liquid 4, and dry substance concentration is 40%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, in two Fluid sprayers, pass into 0.25MPa compressed air.Wherein, compressed air and feed liquid 4 enter two Fluid sprayers from different pipelines respectively.Even rice bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 110 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-5.0kPa.Result granulation is normal, uniform particles, and dust is few.
Embodiment 2:
With 0.13 m
3the flow velocity of/h is by the mixture containing the zymotic fluid of 8% tryptophan, calcium carbonate 21%, corncob 11% that consists of of feed liquid 5(feed liquid 5, dry substance concentration is 40%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, in two Fluid sprayers, pass into 0.35MPa compressed air.Wherein, compressed air and feed liquid 5 enter two Fluid sprayers from different pipelines respectively.Even maize cob meal is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 130 ℃ of hot-airs.Pressure reduction is-6. 1kPa in Granulation Equipments.Result granulation is normal, uniform particles, and dust is few.
Embodiment 3:
With 0.09 m
3the flow velocity of/h is by zymotic fluid, the corncob 26% containing tryptophan 4% that consist of of feed liquid 6(feed liquid 6, and dry substance concentration is 30%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, in two Fluid sprayers, pass into 0.8MPa compressed air.Wherein, compressed air and feed liquid 6 enter two Fluid sprayers from different pipelines respectively.Even wheat bran and calcium carbonate are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 100 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.Result granulation is normal, uniform particles, and dust is few.
Embodiment 4:
With 0.18 m
3the flow velocity of/h is the zymotic fluid containing tryptophan 6% that consists of of feed liquid 7(feed liquid 7, and wheat bran 30%, dry substance concentration is 36%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, in two Fluid sprayers, pass into 0.23MPa compressed air.Wherein, compressed air and feed liquid 7 enter two Fluid sprayers from different pipelines respectively.Even calcium carbonate is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 160 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.Result granulation is normal, uniform particles, and dust is few.
Embodiment 5:
With 0.16m
3the flow velocity of/h is by the mixed liquor containing tryptophan 38%, sodium carboxymethylcellulose 4%, moisture 58% that consists of of feed liquid 8(feed liquid 8, dry substance concentration is 42%) be transported to two Fluid sprayers of Granulation Equipments, simultaneously, in two Fluid sprayers, pass into 0.60MPa compressed air, wherein, compressed air and feed liquid 8 enter two Fluid sprayers from different pipelines respectively.Even corncob and zeolite powder are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 140 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.Result granulation is normal, uniform particles, and dust is few.
The drying equipment adopting in following examples (shown in accompanying drawing 2):
That drying equipment comprises is granulating fluidized bed 7, be arranged on granulating fluidized bed 7 sidewalls forge a knife 9,9 the bilateral symmetry of forging a knife is provided with twin fluid atomization spray gun 1, in twin fluid atomization spray gun 1, be provided with compressed air inlet and feed liquid entrance, granulating fluidized bed bottom is provided with ventilation terminal 8, in granulating fluidized bed, be provided with heater 4, ventilation terminal 8 belows are provided with discharge chamber 6.
Embodiment 6
With 0.14 m
3the flow velocity of/h consists of the mixed liquor containing tryptophan 25%, calcium carbonate 5%, sodium carboxymethylcellulose 10% by feed liquid 4(feed liquid 4, and dry substance concentration is 40%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, in two Fluid sprayers, pass into 0.25MPa compressed air.Wherein, compressed air and feed liquid 4 enter two Fluid sprayers from different pipelines respectively.Even rice bran is placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 110 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.Result granulation is normal, uniform particles, and dust is few.
Embodiment 7:
With 0.16m
3the flow velocity of/h is by the mixed liquor containing tryptophan 38%, sodium carboxymethylcellulose 4%, moisture 58% that consists of of feed liquid 8(feed liquid 8, dry substance concentration is 42%) be transported to two Fluid sprayers of Granulation Equipments, simultaneously, in two Fluid sprayers, pass into 0.60MPa compressed air, wherein, compressed air and feed liquid 8 enter two Fluid sprayers from different pipelines respectively.Even corncob and zeolite powder are placed in Granulation Equipments bottom, and Granulation Equipments bottom passes into 140 ℃ of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.Result granulation is normal, uniform particles, and dust is few.
Claims (10)
1. a spray pelleting process for particle tryptophan premix, the method comprises the steps:
Step a. is transported to the feed liquid containing tryptophan in the atomizer of Granulation Equipments, in atomizer, passes into compressed air; Carrier is placed in step b. Granulation Equipments bottom, and Granulation Equipments bottom passes into hot-air; It is characterized in that, controlling pressure reduction in Granulation Equipments is-4.0 ~-8.0kPa.
2. the method for claim 1, is characterized in that, containing dry biomass concentration in the feed liquid of tryptophan, is 30 ~ 50%.
3. method as claimed in claim 2, is characterized in that, the mass concentration of tryptophan is 3 ~ 38%, and dry comprises tryptophan and additive; Described additive comprises one or more of mineral element, vitamin, calcium carbonate, starch, corncob, wheat bran, wood chip, zeolite powder.
4. method as claimed in claim 2, is characterized in that, carrier be in corncob, calcium carbonate, wheat bran, wood chip, zeolite powder any one or a few.
5. method as claimed in claim 4, is characterized in that, the dry biomass concentration of the feed liquid of tryptophan is 38-45%.
6. the method for claim 1, is characterized in that, in Granulation Equipments, pressure reduction is-5.0 ~-7.0kPa.
7. the method for claim 1, is characterized in that, in step b, hot air temperature is controlled at 100 ~ 160 ℃.
8. the method for claim 1, is characterized in that, it is 0.15 ~ 0.8MPa that step b passes into compressed-air actuated pressure.
9. the method for claim 1, is characterized in that, in step a, atomizer is two Fluid sprayers.
10. the method for claim 1, is characterized in that, in step a with 0.06 ~ 0.20 m
3when the flow velocity of/h is transported to the atomizer of Granulation Equipments by the feed liquid containing tryptophan, in atomizer, pass into 0.15 ~ 0.8MPa compressed air.
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| CN102090516A (en) * | 2010-12-20 | 2011-06-15 | 浙江升华拜克生物股份有限公司 | Particle tryptophan premix and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102090516A (en) * | 2010-12-20 | 2011-06-15 | 浙江升华拜克生物股份有限公司 | Particle tryptophan premix and preparation method thereof |
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| Title |
|---|
| 刘殿宇: "喷雾干燥塔内生产负压应注意的几个问题", 《发酵科技通讯》 * |
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