Particle tryptophan premix and preparation method thereof
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 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 required reason, but organism itself can not produce.Therefore, these amino acid must pass through daily feed and are supplemented.Nonessential amino acid is the amino acid that some organisms can oneself produce, so not necessarily have to be included in food.
Tryptophan is a kind of essential amino acid.In all amino acid, it is minimum that tryptophan is considered to content in food.Although rare, tryptophan plays a very important role in adjustment animal appetite, maintenance body health etc.
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 made after Homogeneous phase mixing.Microcomponent comprises the additives such as various trace quantity mineral substance element, 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 affecting tryptophan particle in mist projection granulating process, in actual production, if parameter is unreasonable, there will be the problems such as granulation difficulty, granular size is uneven, dust is many.
Openly during currently available technology is open how not become output uniform particles, be easy to granulation, preparation parameter that dust is few.
Prior art discloses following spraying granulation technique:
" chemical equipment technology " the 24th 2003 volume the 3rd phases, " optimization of fluidized-bed spray granulation parameters of technique process " is for FI-5 fluidized-bed spray granulation machine, must as drawn a conclusion to the impact analysis of granulation result by the liquid supply speed (factor A) of adhesive, the temperature (factor B) of fluidized-bed layer, the concentration (factor C) of binder solution and compressed air air pressure (factor D) four factors: D, namely liquid supply speed is the strongest on the impact of granulation result, and the impact of compression gas-pressure on granulation result is the most weak; Namely to granulate under being the combination condition of 0.2MPa result the best at liquid supply speed 25ml/min, bed temperature 55 DEG C, binder concn 7%, compression gas-pressure.
" chemical equipment technology " the 26th 2005 volume the 3rd phases " research to fluidized-bed spray granulation technical process control ", disclose fluidized-bed spray granulation technique, wherein result of study is: (1), at nodulizing stage, improves the then particle growth rate decline of fluidization air temperature.(2) at drying stage, the temperature of fluidization air can suitably be improved to reduce drying time and intergranular wearing and tearing.(3) when flow stream velocity is higher, particle formed and the speed of growth very fast, but flow stream velocity raises abrasion of particles also has certain increase, thus causes drying stage domain size distribution to broaden, and shows that particle uniformity is deteriorated.
Chinese patent drug volume the 6th phase June the 33rd in 2011, " fluidized bed prilling legal system is for the process parameter optimizing of kouyanqing granules " discloses fluidized bed spray granulation technique: load weighted stream cream is added appropriate binder preparation slurries according to technological procedure; Dust bag is installed; glassware resets; open spray-drying pelleting machine preheating; when rising to 80 DEG C to temperature, vacuum sucks and has weighed the solid material handled well; after boiling mixing, open peristaltic pump, start spraying granulation; tremble bag once every 3 ~ 5min, studying the order affecting sugar-free kouyanqing granules granulating result is by experiment: atomizing pressure > peristaltic pump rotating speed > binder concentration.
According to above-mentioned disclosed spray granulation processes, all cannot realize preparing tryptophan premix uniform particles, being 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:
Feed liquid containing tryptophan is transported to the atomizer of Granulation Equipments by step a., in atomizer, pass into compressed air; Place carrier bottom step b. Granulation Equipments, bottom Granulation Equipments, pass 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 ~ 0.20m
3feed liquid containing tryptophan is transported to the atomizer of Granulation Equipments by the flow velocity of/h;
Preferably, 0.15 ~ 0.8MPa compressed air is passed in atomizer in step a;
Preferably, in step a, compressed air and feed liquid enter atomizer from different pipelines respectively;
Preferably, in step a with 0.06 ~ 0.20m
3the flow velocity of/h passes into 0.15 ~ 0.8MPa compressed air while the feed liquid containing tryptophan is transported to the atomizer of Granulation Equipments in atomizer;
Preferably, 100 ~ 160 DEG C of hot-airs are passed into bottom Granulation Equipments in step b.
Wherein containing dry biomass concentration in the feed liquid of tryptophan is 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 comprise mineral element, vitamin, calcium carbonate, starch, corncob, wheat bran, wood chip, zeolite powder one or more, 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 being atomized 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 controls at 120 ~ 140 DEG C.
As preferably, described in 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, bottom Granulation Equipments, drum has hot-air, and air inducing is arranged at top, and be connected with compressed air and input material in atomizer, hot-air, air inducing, compressed air, material input simultaneously, and these factors make Granulation Equipments inside form pressure reduction.Prior art does not all instruct the quality that in Granulation Equipments, pressure reduction can be prepared particle tryptophan premix to produce significant impact, the applicant surprisingly finds: in Granulation Equipments, pressure reduction is-4.0 ~-8.0kPa, desirable particle tryptophan premix can be prepared, not only uniform particles, reduce the steam consumption of granulation process simultaneously, and reduce the Dust Capacity entering tail gas.Achieve low cost, low energy consumption, cleanly production.Following experimental example is used for further illustrating technique effect of the present invention, but does not form the restriction of scope.
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 diagram 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.
Detailed description of the invention
The drying equipment (shown in accompanying drawing 1) adopted in following examples:
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 the granulating fluidized bed 7 interior crystal grain surfaces for fluidized state equably, the crystal grain at the bottom of fluid bed is made to be in fluidized state), grown up gradually by reunion and coating effect, dried under the effect that jointly adds of the internal heater 4 simultaneously in hot-air and granulating fluidized bed 7, from granulating fluidized bed discharging opening 6 discharging.
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: arrange 6 experimental group, investigates: in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments, pressure reduction is on the impact of granularity respectively.
Experimental group 1: with 0.14m
3feed liquid 1 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even wheat bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 160 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 1.
Experimental group 2: with 0.20m
3feed liquid 1 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 100 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.The results are shown in Table 1.
Experimental group 3: with 0.06m
3feed liquid 1 is transported to two Fluid sprayers of Granulation Equipments by the pressure of the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 130 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-5.0kPa.The results are shown in Table 1.
Experimental group 4: with 0.04m
3feed liquid 1 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob and zeolite powder bottom Granulation Equipments, bottom Granulation Equipments, pass into 140 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-3.0kPa.The results are shown in Table 1.
Experimental group 5: with 0.16m
3the flow velocity of/h, by being 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.Place even wheat bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 125 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-9.0kPa.。The results are shown in Table 1.
Experimental group 6: with 0.09m
3feed liquid 1 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob and wood chip bottom Granulation Equipments, bottom Granulation Equipments, pass into 80 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-1.8kPa.The results are shown in Table 1.
Result: in table 1.
The each factor of table 1 affects result to granularity
Experimental example 2
Experiment material:
Feed liquid 2 forms: containing the mixed liquor of tryptophan 38%, calcium carbonate 5%, starch 7%, moisture 50%, and dry substance concentration is 50% as calculated.
Method: arrange 6 experimental group, investigates: in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments, pressure reduction is on the impact of granularity respectively.
Experimental group 7: with 0.14m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even wheat bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 160 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 2.
Experimental group 8: with 0.20m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 100 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.The results are shown in Table 2.
Experimental group 9: with 0.06m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the pressure of the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 130 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.The results are shown in Table 2.
Experimental group 10: with 0.04m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob and zeolite powder bottom Granulation Equipments, bottom Granulation Equipments, pass into 140 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-3.0kPa.The results are shown in Table 2.
Experimental group 11: with 0.16m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even wheat bran bottom Granulation Equipments, pass into 125 DEG C of hot-airs bottom Granulation Equipments, in Granulation Equipments, pressure reduction is-9.0kPa.The results are shown in Table 2.
Experimental group 12: with 0.09m
3feed liquid 2 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 80 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-1.8kPa.The results are shown in Table 2.
Result: in table 2.
The each factor of table 2 affects result to granularity
Experimental example 3
Experiment material:
Feed liquid 3 forms: containing the mixed liquor of tryptophan 3%, corncob 15%, zeolite powder 18%, moisture 64%, and dry substance concentration is 36% as calculated.
Method: arrange 6 experimental group, investigates: in charging flow velocity, compressed air pressure, hot air temperature, Granulation Equipments, pressure reduction is on the impact of granularity respectively.
Experimental group 13: with 0.14m
3feed liquid 3 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even wheat bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 160 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.The results are shown in Table 3.
Experimental group 14: with 0.2m
3feed liquid 3 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 100 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.The results are shown in Table 3.
Experimental group 15: with 0.06m
3feed liquid 3 is transported to two Fluid sprayers of Granulation Equipments by the pressure of the flow velocity of/h, 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.Place even rice bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 130 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-6.0kPa.The results are shown in Table 3.
Experimental group 16: with 0.04m
3feed liquid 3 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob and zeolite powder bottom Granulation Equipments, bottom Granulation Equipments, pass into 140 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-9.0kPa.The results are shown in Table 3.
Experimental group 17: with 0.16m
3the flow velocity of/h, by being 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.To place even wheat bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 125 DEG C of hot-airs. in Granulation Equipments, pressure reduction is-2.0kPa.The results are shown in Table 3.
Experimental group 18: with 0.09m
3feed liquid 3 is transported to two Fluid sprayers of Granulation Equipments by the flow velocity of/h, 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.Place even corncob bottom Granulation Equipments, bottom Granulation Equipments, pass into 80 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-2.0kPa.The results are shown in Table 3.
Result: in table 3.
The each factor of table 3 affects result to granularity
Embodiment 1
With 0.14m
3feed liquid 4(feed liquid 4 is consisted of the mixed liquor containing tryptophan 25%, calcium carbonate 5%, sodium carboxymethylcellulose 10% by the flow velocity of/h, 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.Place even rice bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 110 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-5.0kPa.Result granulation is normal, and uniform particles, dust is few.
Embodiment 2:
With 0.13m
3the flow velocity of/h is by the mixture consisted of containing the zymotic fluid of 8% tryptophan, calcium carbonate 21%, corncob 11% of feed liquid 5(feed liquid 5, dry substance concentration is 40%) be transported to two Fluid sprayers of Granulation Equipments, meanwhile, 0.35MPa compressed air is passed in two Fluid sprayers.Wherein, compressed air and feed liquid 5 enter two Fluid sprayers from different pipelines respectively.Place even maize cob meal bottom Granulation Equipments, bottom Granulation Equipments, pass into 130 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-6.1kPa.Result granulation is normal, and uniform particles, dust is few.
Embodiment 3:
With 0.09m
3the flow velocity of/h is by the zymotic fluid, the corncob 26% that consist of containing tryptophan 4% 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.Place even wheat bran and calcium carbonate bottom Granulation Equipments, bottom Granulation Equipments, pass into 100 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-7.0kPa.Result granulation is normal, and uniform particles, dust is few.
Embodiment 4:
With 0.18m
3the flow velocity of/h is by the zymotic fluid consisted of containing tryptophan 6% 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.Place even calcium carbonate bottom Granulation Equipments, bottom Granulation Equipments, pass into 160 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.Result granulation is normal, and uniform particles, dust is few.
Embodiment 5:
With 0.16m
3the flow velocity of/h is by the mixed liquor consisted of containing tryptophan 38%, sodium carboxymethylcellulose 4%, moisture 58% of feed liquid 8(feed liquid 8, dry substance concentration is 42%) be transported to two Fluid sprayers of Granulation Equipments, simultaneously, 0.60MPa compressed air is passed in two Fluid sprayers, wherein, compressed air and feed liquid 8 enter two Fluid sprayers from different pipelines respectively.Place even corncob and zeolite powder bottom Granulation Equipments, bottom Granulation Equipments, pass into 140 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.Result granulation is normal, and uniform particles, dust is few.
The drying equipment (shown in accompanying drawing 2) adopted in following examples:
Drying equipment comprise granulating fluidized bed 7, be arranged on granulating fluidized bed 7 sidewalls forge a knife 9, forge a knife 9 bilateral symmetry be provided with twin fluid atomization spray gun 1, compressed air inlet and feed liquid port is provided with in twin fluid atomization spray gun 1, granulating fluidized bed bottom is provided with ventilation terminal 8, be provided with heater 4 in granulating fluidized bed, below ventilation terminal 8, be provided with discharge chamber 6.
Embodiment 6
With 0.14m
3feed liquid 4(feed liquid 4 is consisted of the mixed liquor containing tryptophan 25%, calcium carbonate 5%, sodium carboxymethylcellulose 10% by the flow velocity of/h, 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.Place even rice bran bottom Granulation Equipments, bottom Granulation Equipments, pass into 110 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-4.0kPa.Result granulation is normal, and uniform particles, dust is few.
Embodiment 7:
With 0.16m
3the flow velocity of/h is by the mixed liquor consisted of containing tryptophan 38%, sodium carboxymethylcellulose 4%, moisture 58% of feed liquid 8(feed liquid 8, dry substance concentration is 42%) be transported to two Fluid sprayers of Granulation Equipments, simultaneously, 0.60MPa compressed air is passed in two Fluid sprayers, wherein, compressed air and feed liquid 8 enter two Fluid sprayers from different pipelines respectively.Place even corncob and zeolite powder bottom Granulation Equipments, bottom Granulation Equipments, pass into 140 DEG C of hot-airs.In Granulation Equipments, pressure reduction is-8.0kPa.Result granulation is normal, and uniform particles, dust is few.