国产成人精品久久,偷窥日本少妇撒尿com,少妇被粗大的猛烈进出免费视频,国产精品美女WWW爽爽爽视频

歡迎來到冀群(江蘇)儀器有限公司網(wǎng)站!
咨詢熱線

13236572657

當(dāng)前位置:首頁  >  技術(shù)文章  >  英國 Labplant 噴霧干燥儀在奶粉中的應(yīng)用

英國 Labplant 噴霧干燥儀在奶粉中的應(yīng)用

更新時間:2021-11-30  |  點擊率:1836

英國 Labplant 噴霧干燥儀在奶粉中的應(yīng)用

 

Labplant spray dryer tests

 

 

The milk used was reconstituted in the following way:

 

200g  milk powder

 

1.7L of tap water

 

giving 2L of milk with a measured density of 1.045 at 21’C.

 

We used a fixed flow, whatever the experiment ; pump flow set at 5, corresponding to

13.5mL/min.

 

Varying the injection temperature of the product

 

We did a first test with an injection temperature of 130’C and then a second test at 140’C.

 We saw that spray drying was achieved, apparently, comfortably at these two 

temperatures.Effectively no liquid ran along the walls of the main spray chamber, even at

130’C. This meant that we could work at 140’C or 130’C given the stipulated flow.

In theory it is preferable to work at 140’C, because the higher the temperature the better

the yield. We will try to prove this through our experiments.

 

Varying the compressed air ratio / feed flow

 

 

We worked with a flow set at 5 (13.5mL/min) and compressed air set at 3 bars

(constant air inlet valve opening).

 

In theory to increase the size of the agglomerate, it is necessary to favour the agglomeration

 mechanism over the drying process. One of the possible means is to decrease the spraying

 rate. In the case of this equipment, to decrease the spraying rate you can either decrease the

flow of compressed air through the injection nozzle (while keeping a constant pressure) or

you can decrease the pressure of the compressed air (while keeping a constant flow).

 

Therefore we tried two tests with constant air and liquid flows, varying the pressure from 2

to 3 bars.We observed the look of the powders we obtained ; it was difficult to decide just

with the naked eye, an additional granulometric(?) study would be necessary, but it did seem

that the powder obtained with 3 bars of pressure was effectively finer than that obtained with

 2 bars.

 

Research into the effective operational limits of the spray dryer

 

 

We retained the same solution of reconstituted milk.

 

At a given flow and pressure of air, we increased the flow of liquid from level 5

(13.5mL/min) to level 10 (28.8mL/min). We very quickly saw that the formation of the

spray in the atomisation tube was not good : in effect the quantity of liquid going through

the tube was too much and could not be vaporised on exiting the tube. This was why we had

some liquid that ran out of the tube, ran along the walls of the spray chamber, of the fan

chamber (cyclone?) and even in the recuperation chamber. Under these conditions the yield

of finished product would be bad.

 

QUANTITATIVE STUDY

 

 

The experiments carried out and the experiment details are given below.

 

Experiment 1 : starting from 100g/L of reconstituted milk

 

Amount of milk powder

 200g


Amount of water

  1700g


Volume of milk

2L


Density of milk

      1.045g/mL


Humidity of milk

        89.47 % mas


Injection temp (??)

  130’C


Injection flow

       13.5mL/min


Working time

  40 min


Compressed air pressure

 3 bars


Humidity of labo

     21.8 %HR

   6g vapour / m3 air

Ventilator flow

   70 m3/h


Gas exit temp

77’C


Air exit humidity

    18.8 %HR

    21.3g vapour / m3 air

Bottle size

339g


Bottle + wet milk

391.9


Bottle + dry milk

           390


 

From the experiment details we calculated the following:

 

humidity of the milk : 100 x water mass (water mass + powder mass)

 

numerical application : % humidity of the milk = 100 x 1700/(1700+200) = approx 89.5%

the mass of the wet milk we collected = 391.9 – 339 = 52.9g

 

the mass of the dry matter we collected = 390 – 339 = 51g

 

humidity of the solid = 100 x (52.9 – 51)/52.9 = approx 3.6%

 

Materials ‘balance sheet’ of the dry milk over the life of the experiment:

 

at the start : dry matter is the result of the solution to be tested

 

at the exit : dry matter of the solid that was obtained

 

Numerical application

 

a) at the start : 13.5mL/min x 1.045 g/mL x 40 min x (100-89.47)/100 = approx 59.4g

b) at the exit : 51g

 

c) solid yield = 100 x 51 / 59.4 = approx 85.9%

 

Materials ‘balance sheet’ of the water over the life of the experiment

 

b) at the start : (13.5mL/min x 1.045 g/mL x 40 min x 89.47 / 100) + 70 m3/h x 6 g/m3 x40/60 = 784.8 approx of water

 

c) at the exit : (52.9g x 3.6 /100) + (70m3/h x 21.3 g/m3 x 40/60) = approx 995.9

 

d) water yield = 100 x 995.9 / 784.8 = approx 127%

 


成人H动漫精品一区二区| 久久狠狠高潮亚洲精品| 强壮公把我一次次弄上高潮 | 99精品人妻无码专区在线视频| 婷婷色国产偷v国产偷v| 日本理伦片午夜理伦片| 天天爽夜夜爽夜夜爽精品视频| 99久久99久久精品免费看蜜桃 | 国产精品久久日日苍井空| 亚洲第一网色综合久久红第一| 国产50部艳色禁片无码| 人妻少妇精品久久久久久 | 寡妇玩XXXXXX猛男吃奶| 欧美巨鞭大战丰满少妇| 精品久久久噜噜噜久久久| 两个女人互添下身高潮| 国产精品久久久久久亚洲AV| av无码久久久久久不卡网站| 洗衣屋樱花未增删带翻译樱花| 色欲欲WWW成人网站| 国产JAZZ亚洲护士无码| 国产免费AV片无码永久免费| 99久久人妻精品免费二区| 最近2019年日本中文字幕免费 | 国产精品扒开腿做爽爽爽A片软件| 女上男下啪啪激烈高潮无遮盖| 欧美乱人伦人妻中文字幕| J8又粗又硬又大又爽又长A片| 亚洲AV综合色区无码另类小说| 宝贝胸罩脱了让我揉你的胸| 亚洲熟妇无码另类久久久| 久久99精品国产99久久6尤物| 成人性生交大片免费看中文| 在线电影你懂的| 天堂中文8资源在线8| 国产嫖妓一区二区三区无码| 农民人伦一区二区三区| 精品国产不卡一区二区三区| 奇米777四色欧美在线视频| 免费无码AV一区二区三区| 欧美变态深喉囗交XXXX|