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%

 


亚洲AV日韩AV永久无码色欲| 最近2019年日本中文字幕免费| 粗大挺进尤物人妻中文字幕 | 中文字幕乱码一区二区欧美| 午夜亚洲AV永久无码精品| 山村最原始的肉欲伦情| 国产色婷亚洲99精品AV | 精品丝袜av在线观看视频| 国产亚洲精品久久久久久无码下载 | 麻豆国产av国片精品有毛| 两个男用舌头到我的蕊花| 揉捏新婚少妇高耸的双乳| 欧美日韩国产精品| 国产农村熟妇出轨videos| 单亲与子的性关系A片| 精品人妻系列无码人妻免费视频 | 国产最猛性XXXX69交| 狠狠色噜噜狠狠狠狠色综合久| 99精品国产兔费观看久久99| 亚洲精品中文字幕乱码三区 | AV无码精品一区二区三区| 少妇乱子伦精品无码| 97久久精品人人槡人妻人| 扒开粉嫩小泬白浆20P| 精品一区高潮喷吹在线播放 | 国产欧美日韩精品丝袜高跟鞋| 狠狠人妻久久久久久综合九色| 7777色鬼XXXX欧美色妇| 国产免费观看黄a片又黄又硬小说| 一本大道AV伊人久久综合| 国产偷抇久久精品A片蜜臀A | 亚洲欧美日本| 成人毛片100免费观看| 久久久久波多野结衣高潮| 最近中文字幕免费MV视频7| 国产精品爽爽VA在线观看 | 午夜精品久久久久久久99热蜜桃| 欧美人伦禁忌DVD放荡欲情| 娇妻被朋友日出白浆H| 男女裸体做爰爽爽全过程| 大秦赋全集1-78集免费观看 |