噴霧干燥廣泛應(yīng)用在化工、食品、生物、制藥等工業(yè)，特別是食品加工業(yè)，如奶粉、飲料粉、淀粉等加工過(guò)程中，噴霧干燥利用干的熱空氣將微粒子化的液體瞬時(shí)脫去水分，得到干粉。
噴霧干燥三種常用方式
? 離心式
? 壓力式
? 二流體式
高壓噴嘴——作為噴霧干燥的關(guān)鍵點(diǎn)
在大豆蛋白噴霧干燥行業(yè)，一般使用壓力式的噴霧方式，其原理是將液體經(jīng)泵加壓到噴頭部分，在噴出噴嘴后壓力瞬時(shí)降低，液體達(dá)到微?；?，這時(shí)和經(jīng)過(guò)加熱的干空氣接觸后進(jìn)行熱交換，蒸發(fā)水分。
根據(jù)客戶的需求，改變噴粉條件如霧化方式、時(shí)間、壓力、溫度、工藝設(shè)備可以改變產(chǎn)品的粒度、密度、顏色、風(fēng)味，從而獲得不同性能的產(chǎn)品。 
噴嘴應(yīng)用
? 不同的蛋白廠使用的干燥塔需要選擇不同型號(hào)的噴嘴；
? 一般每把噴槍上安裝4-8個(gè)噴嘴，噴霧形狀：扇形；
? 噴嘴材質(zhì)：碳化鎢，使用壓力26-35Mpa；
使用壓力越高，噴嘴爆裂情況就越多，使用壽命就會(huì)越短，需要的更換噴嘴的時(shí)間就越快，對(duì)正常生產(chǎn)會(huì)造成一定的影響，作為一個(gè)易損耗配件，噴嘴的好壞直接影響噴霧干燥后產(chǎn)品的品質(zhì)。
選擇邁德樂(lè)品牌的噴嘴
? 精密的加工設(shè)備，噴霧均勻穩(wěn)定
? 進(jìn)口的碳化鎢材料，耐磨損、耐高壓
? 噴霧干燥
? 陶瓷噴釉
? 零件噴漆
? 表面噴涂、清洗
注：
由于大豆蛋白粘度較高，蛋白粉極易吸潮，干燥過(guò)程中塔壁極易粘粉，需要及時(shí)清掃，一般可以建議使用噴嘴進(jìn)行清洗。
Spray drying is widely used in the chemical, food, biological and pharmaceutical industries, especially in the food processing industry, such as milk powder, beverage powder, starch and other processing processes. Spray drying uses dry hot air to instantly remove the moisture from the micro articulated liquid to obtain a dry powder.
Three common methods of spray drying
- Centrifugal
- Pressure
- Air atomizing type
High pressure nozzles - as a key point in spray drying
In the soy protein spray drying industry, pressure-based spraying is generally used. The principle is that the liquid is pressurized by a pump to the nozzle section and the pressure is instantaneously reduced after spraying out of the nozzle and the liquid reaches particulation, at which point it comes into contact with heated dry air for heat exchange and evaporation of water.
Depending on the customer's needs, changing the spraying conditions such as atomization method, time, pressure, temperature and process equipment can change the particle size, density, colour and flavour of the product, thus obtaining different properties.
Nozzle applications
- Different types of nozzles are required for different drying towers used in different protein plants.
- Generally 4-8 nozzles installed on each gun, spray shape: fan-shaped.
- Nozzle material: tungsten carbide, operating pressure 26-35Mpa.
The higher the pressure, the more nozzles burst, the shorter the service life, the faster the time needed to replace the nozzles, which will have a certain impact on normal production, as a wear and tear accessories, the nozzles directly affect the quality of the products after spray drying.
Choose a Mideler brand nozzle
- Precision machining equipment for even and stable spraying
- Imported tungsten carbide material, resistant to wear and high pressure
High pressure nozzle applications
- Spray drying
- Ceramic glazing
- Painting of parts
- Surface spraying, cleaning
Notes.
Due to the high viscosity of soy protein, protein powder is very easy to absorb moisture, the drying process of the tower wall is very easy to stick to the powder, need to be cleaned in time, can generally recommend the use of nozzles for cleaning.
For more details about spray dry nozzles and tank cleaning nozzles, please feel free to contact Mideler engineers.