CN201255558Y

CN201255558Y - Spray drying apparatus

Info

Publication number: CN201255558Y
Application number: CNU2008200419744U
Authority: CN
Inventors: 蒋中昕
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-05
Filing date: 2008-08-05
Publication date: 2009-06-10
Anticipated expiration: 2018-08-05

Abstract

The utility model relates to a spray drying device, which comprises a drying tower and a cyclone separator; wherein, an atomizer is arranged at a top part of the drying tower and an internal fluidized bed is arranged at a bottom part of the drying tower; a discharge port of the internal fluidized bed is connected with an external fluidized bed through a charge pipe. By combining the drying technology of the fluidized beds and the spray drying technology, the utility model causes the shapes and sizes of granules to be easily controlled and can finish the drying process as well as keep lower powder temperatures and can be applied to the drying and forming of thermo-sensitive products; the fine powders collected by the cyclone separator are recycled into the drying tower to greatly increase the dust concentration in the drying tower, and the dusts are mixed with atomized droplets which are not fully dried to achieve agglomeration and granulation, which reduces the dust content of products to the smallest extent, greatly reduces the material loss and improves the rate of finished products and saves the cost. An anti-wall sticking device successfully solves the problem of material wall sticking. The utility model is simple in structure, reduces the difficulty of equipment cleaning and improves the utilization efficiency of materials.

Description

Spray-drying installation

Technical field

The utility model relates to a kind of spray-drying installation.

Background technology

Spray-drying installation is a kind of multi-functional special equipments such as spray-drying, granulation that integrate, and is widely used in food, pharmacy, agriculture chemical manufacture.The spray-drying installation of prior art mainly is made up of spray drying tower, atomizer, cyclone separator, firing equipment and air filter unit.Spray-drying process can be processed as fine powder (containing a large amount of dust) with the liquid that pump is carried continuously with nearly all.In order to reduce thermal energy consumption, liquid can be preheated earlier, and by fog-spray nozzle material is atomized, the atomizing material in hothouse after, moisture is evaporated rapidly, shaping material fine powder is collected, can carry out next step necessary processing, overall process need not artificial treatment.

Yet this equipment product processed particle diameter is little, narrow particle size distribution, do not form the fine powder more (accounting for more than 50～100%) of particle in the finished product, and material is easy to generate sticking wall problem in the drying tower, cause material loss bigger, product yield is very low, directly has influence on production efficiency of products, quality and energy resource consumption; Simultaneously, because the spray-drying of prior art is just passed through the material convection drying of the convection current of hot-air in the drying tower with atomizing, relative temperature is higher, at some thermally sensitive liquid of processing, there is certain problem in the processing of extracting concentrate etc. as amino acid, yeast, vegetable fat powder, milk, plant or Chinese herbal medicine.

The utility model content

The purpose of this utility model is to provide a kind of the loss late of processing materials is reduced significantly, product is produced the efficient height, powder dust content is few, can the free flowing granule product, and can when keeping low powder temperature, finish the drying process with atomizing of dry run.

The technical scheme that realizes the utility model purpose is: the utlity model has drying tower and cyclone separator, described drying tower top is provided with atomizer; Described drying tower bottom is provided with built-in fluid bed, and the logical charge tube of the discharging opening of built-in fluid bed connects external fluid bed.

Above-mentioned built-in fluid bed and external fluid bed are orifice plate or mesh structure fluid bed.

The feedback outlet of above-mentioned cyclone separator is arranged on the middle part of drying tower.

Be provided with antiseized wall mechanism in the above-mentioned drying tower, described antiseized wall mechanism has the bull stick that matches with the drying tower inner wall shape and drives the driven unit that bull stick moves along the drying tower inwall, described bull stick is a hollow tube, its lower end is connected with compressed air hose, and body is provided with fumarole near a side of drying tower inwall.

The utlity model has following characteristics:

(1) the utlity model has two fluid beds, built-in fluid bed can be delivered to external fluid bed by the logical charge tube of discharging opening with shaping and granularity and the satisfactory material particles of humidity and further process processing, unfashioned material fine powder, the material particles that particle diameter is too small and compactness is not enough can fully contact bonding with liquid droplet once more, form satisfactory particle, it is few to have guaranteed that product contains Dust Capacity, thereby reach the dustless requirement of product, yield rate is higher, and granulating efficiency is good.

(2) owing to spray-drying and fluidized bed drying processing technology be combined in the drying tower carry out, so can in the big excursion of relevant particle size, moisture and drying air temperature, operate drying tower, thereby better control the degree and the effect of particle agglomeration or granulation, the temperature that can guarantee particle in whole dry run remains lower, therefore is particularly suitable for dry thermal sensitivity product.

(3) the cyclone separator feedback outlet in the utility model is arranged on the drying tower middle part, and the material dust that cyclone separator is collected directly enters and carries out granulation process in the drying tower, need not to atomize through atomizer once more, saves cost.

(4) be provided with antiseized wall device in the drying tower of the present utility model, this device is pressed close to the inwall place and is constantly stirred in spray-drying process, prevent the generation of the sticking wall of wet stock, the compressed air that sprays in the fumarole of bull stick can be clean with the drying tower inner wall blowing simultaneously, solved the sticking wall problem of material, reasonable in design ingenious.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

(embodiment 1)

See Fig. 1, the utlity model has drying tower 1 and cyclone separator or bag hose 2, the air outlet on drying tower 1 top is connected with the import of cyclone separator by pipeline; Drying tower 1 top is provided with atomizer 3, the bottom is provided with built-in fluid bed 4, the logical charge tube 5 of the discharging opening of built-in fluid bed 4 connects external fluid bed 6, built-in fluid bed 4 and external fluid bed 6 are orifice plate or mesh structure fluid bed, have built-in fluid bed orifice plate 41 and external fluid bed orifice plate 61 respectively, built-in fluid bed 4 and external fluid bed 6 bottoms all are connected with air line 8; Be provided with antiseized wall mechanism 7 in the drying tower 1, described antiseized wall mechanism 7 has the bull stick 71 that matches with drying tower 1 inner wall shape and drives the driven unit 72 that bull stick 71 moves near drying tower 1 inwalls, described bull stick 71 is a hollow tube, its lower end is connected with compressed air, and body is provided with row's fumarole near a side of drying tower 1 inwall; The feedback outlet of cyclone separator 2 is arranged on the middle part of drying tower 1.

When spray-drying installation of the present utility model is worked, heated material liquid is sprayed onto in the drying tower 1 through atomizer 3 atomizings by feed pipe 9, atomized drop moisture in drying tower is evaporated rapidly, form material particles, drop down onto afterwards in the built-in fluid bed 4, through entering external fluid bed 6 fluidized dryings and cooling by the logical charge tube 5 of discharging opening after the fluidized drying of built-in fluid bed 4, because blowing of built-in fluid bed 4 bottom hot-airs, make the material dust of carrying secretly in the material particles rise to drying tower 1 middle part with hot-air, contact the formation material particles with the atomized drop of ejection in the fog-spray nozzle 3, and also can leading to charge tube, the material dust in material dust in the external fluid bed 6 and cyclone separator or the bag hose 2 reenters in the drying tower 1, contact the formation material particles with the atomized drop of ejection in the fog-spray nozzle 3, thereby it is few to make that product contains Dust Capacity, has improved the loss late and the production efficiency of processing materials simultaneously; And the bull stick 71 of antiseized wall mechanism 7 moves at the driving lower edge of driven unit 72 drying tower 1 inwall, prevent the generation of the sticking wall of wet stock, when bull stick 71 moves along drying tower 1 inwall, compressed air in bull stick 71 bodys blows out from fumarole, can the drying tower inner wall blowing is clean, solve the sticking wall problem of material, reduced the loss of material.

Claims

1, a kind of spray-drying installation has drying tower (1) and cyclone separator (2), and described drying tower (1) top is provided with atomizer (3); It is characterized in that: described drying tower (1) bottom is provided with built-in fluid bed (4), and the logical charge tube (5) of the discharging opening of built-in fluid bed (4) connects external fluid bed (6).

2, spray-drying installation according to claim 1 is characterized in that: described built-in fluid bed (4) and external fluid bed (6) are orifice plate or mesh structure fluid bed.

3, spray-drying installation according to claim 2 is characterized in that: the feedback outlet of described cyclone separator (2) is arranged on the middle part of drying tower (1).

4, spray-drying installation according to claim 1, it is characterized in that: be provided with antiseized wall mechanism (7) in the described drying tower (1), described antiseized wall mechanism (7) has the bull stick (71) that matches with drying tower (1) inner wall shape and drives the driven unit (72) that bull stick (71) moves along drying tower (1) inwall, described bull stick (71) is a hollow tube, its lower end is connected with compressed air hose (8), and body is provided with fumarole near a side of drying tower (1) inwall.