Spray granulation dryer principle and process
Main products: drying equipment, mixing dryer , spray granulation dryer , vibrating fluidized bed dryer , air stream flash dryer , belt dryer
Spray granulation dryer works:
Granulation refers to the addition of a certain amount of binder to the ground powder, which is uniformly blended to form a granulated powder. The powder has good fluidity and calendering properties, so that it can be used in the tableting process. A sheet having better strength and less delamination cracking can be obtained. In the industrial production, the spray granulation dryer method is adopted. The basic principle is that the powder with binder is sprayed into the granulation tower by atomizer to atomize, and the droplets in the tower are dried by the hot gas in the tower. The granulated powder is then discharged from the bottom of the drying tower.
The pressure spray granulation dryer mainly consists of a feeding system, a drying system, a dust removal system, a heating system and an electrical system, and each system includes some related equipment.
The feeding system consists of a mixing tank, a filter, a diaphragm pump and a spray gun. The ball-milled secondary slurry is transferred from the ball mill to the mixing drum, pumped by a diaphragm pump and conveyed, and then passed through a spray gun into the drying tower.
Spray granulation dryer process:
The slurry enters the drying tower from the nozzle of the spray gun and begins the spray granulation drying process. The specific process is divided into three stages:
(1) slurry atomization. The slurry is pressed into the drying tower from the nozzle by a diaphragm pump in the feeding system, and the energy of the pressure is converted into kinetic energy. The slurry is ejected from the nozzle from the bottom to the top to form a high-speed liquid film, and the liquid film is then split into Droplet. The droplet size produced by atomization is inversely proportional to the pressure, and the throughput of the nozzle is proportional to the square of the pressure.
(2) The mist particles are dried into balls. Fog particles mixed with the hot air stream in a working manner, the hot air is generated an air flow downward through the flow line on the top cover of hot air into the tower dispenser, hot air distributor, the hot injected upwardly from the mist droplets Air flow. The droplets form a spherical shape due to the surface tension, and at the same time, since the droplets have a large surface area, the moisture rapidly evaporates and dries, and the Zui eventually shrinks to form a dry spherical particle.
Granulated powder.
(3) The granule powder is discharged. The formed spherical particulate powder gradually settles in the drying tower and is separated from the hot air, and the funnel cavity in the lower portion of the tower collects the particulate material and discharges it from the discharge port. The finer pellets are drawn together with the dry air by an extractor connected to the funnel-shaped upper portion into the dedusting system.
Hormone:
A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control. Many hormones, such as neurotransmitters, are active in more than one physical process.
Endocrine:
Pertaining to hormones and the glands that make and secrete them into the bloodstream through which they travel to affect distant organs. The endocrine sites include the hypothalamus, pituitary gland, pineal gland, thyroid, parathyroids, heart (which makes atrial-natriuretic peptide), the stomach and intestines, islets of Langerhans in the pancreas, the adrenal glands, the kidney (which makes renin, erythropoietin, and calcitriol), fat cells (which make leptin). the testes, the ovarian follicle (estrogens) and the corpus luteum in the ovary). Endocrine is as opposed to exocrine. (The exocrine glands include the salivary glands, sweat glands and glands within the gastrointestinal tract.)
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