To clean out the middle and small impurity from wheat. e.g., dust, stone, magnetic material, rye was bitten by insect and so on. Includes beating, screening, destoner, magnetic separator and dampening. This section is to prepare for milling part and to protect the machinery as well.
2. Milling part
The second step, to mill the grain and separate the flour, bran and other by-product:
(1) Mill: mill the grain to break the integrity by the roller moving.
(2) Sifter: to separate the flour,bran and other by-product, also separate large size and small size to ensure flour quality.
3. Packing part
The third step, the packing machine can be manual or automatic weighting and packing.
4. PLC controlling system
To controlling the whole set of machinery to work well and showing the process of working.
1.Introduction for technology:
1.1 The 180T/24H refined rye flour processing plant below is specially designed according to the rye which belongs to hard rye type.
1.2 This design adopts long technical flow in rye flour processing plant, and equips 10 sets of MME/D25/100 auto-pneumatic roller mills to form the 5B.7M.2S.2T technology which is full-blown in Europe. The 3rd B, 4th B and 5th B are classified by fineness and coarseness. The bran stock is dealt with bran scourer to shorten the B mills flow. Smooth roller is used in M mills, S mills and 1T, and combined with impact detacher to reduce the power of final grinding stages. Smooth roller is also used in 2T to deal with the T mill material specially. That will have the important function of ash controlling. Specified roll surface: 11.11mm/100Kg.wheat.24h;
Specified sifter surface: 0.95M2/100Kg. wheat.24h;
Sieve of purifier surface: 0.046m2/100Kg.wheat.24h;
1.3Considering the requirement of environment pretending, we suggest the drying cleaning system which is popular in Europe. At the same time, intensive dampener，which one controlled by PLC for dampening is used to get the average moisture for milling. The technology is 2 sieves, 2 scourers, 1 destoner, 2 dampeners, 3 magnetic separators. The clean rye has the cleaning flow of air channel to ensure the purity of the wheat. All of the machines above are of blocking type.
1.4In the tropic with wet climate. The clean rye needs less than 18hours’tempering before going to the mills.
In the tropic with dry climate. The clean rye needs more than 18hours’tempering before going to the mills.
1.5Economic technology guideline: If producing 1 grade of flour, the extraction rate is75%, cumulative ash content is 0.54-0.62%. If producing both 2 grades of flour, the extraction rate of grade 1 flour is 50%, and ash 0.43-0.54%; and the extraction rate of grade 2 flour is 28%, and ash 0.62-0.65%. The ash content above is on wet basis. The power cost is no more than 65kw.h/t flour if conventional operation.
This data is based on the rye better than grade 2 from America or Australia.
1.6Flour is blowed to the packing store which is 120 meters far away. And there is a store for small bag packing which is 20 meters from flour workshop, an electric valve is to distribute the flour to the small bag packing store or 120 meters big bag packing store.
Flour is blowed to flour store to pack for keeping workshop clean.
1.7Pollard and bran are directly push to packed, and all of the by-products which came from cleaning section goes into bran after crushing.
1.8Total power: 610 KW
1.9Flour blowing system is equipped with Worm egg killer, the principle is: adopt High Rotary Speed of machine to break the worm eggs hidden in the flour. After worm egg killer, flour safekeeping time will increase 3 and 5 times than before.
2.Preparing work of customer:
The physiognomy drawing of the land for workshop is required in order to help us to do adjustment of the workshop accordingly.
3.Requirements for crude wheat:
This technology is designed according to the customer’s requirement of the crude rye and flour, so analysis of crude rye is required. The sample of the crude rye is required for our testing in order to give the more reasonable design. No less than 1.5kg of each type of crude rye is suggested to supply for our testing.
4.Capacity of product and by-product, and disposal of byproduct:
4.1The first week after installation is commissioning period, the capacity is 160T/24h.
The second week, the capacity testing is up to 200T/24h.
The normal capacity is 180T/24h.
4.2The production getting rate: read 1,1,1.5; the production disposal: read 1,1,1.6.
5.Technical flow chart (refer to drawings)
II Equipment part
1.The customer should be responsible for the civil engineering and the groundwork. Water and 3 phase electricity for construction and installation, hoist and fork vehicle for load and unload of the machines, 8-10 installing technicians who can speak frequently English should be prepared by the customer.
We will be responsible for 1 installing engineer, 3 installing technicians and installing tools, installing stuff, tools for welding and cutting which is necessary for the installation of the machine.
2.The quotation includes whole set of main equipment, accessory equipment, and the cables, wires and pipes belongs to machines. We are responsible for the cables between grade 2 switchboard and machines, not for the cables between grade 2 switchboard to grade 1 switchboard and to transformer.
3.Controlling system: adopting PLC system together with electrical cabinet:
Automatically display raw wheat, clean wheat, flour, pollard, bran instant flowing quantity.
Automatically display raw wheat, clean wheat, flour, pollard, bran instant flowing percentage.
Automatically display raw wheat, clean wheat, flour, pollard, bran add up flowing percentage in a fixed time.
With working history checking system.
With fault alarm system.
4.Equipment list and the technical reference for the main equipment.
III Basis part
1.Dimension of the workshop: read drawing
2.Material warehouse and product storage: design and install by the buyer
3.Water capacity of factory required: 9T/D
4.Worker: every shift(8 hours)----1 worker in PLC controlling room, 1 worker in flour section, 1 worker in cleaning section,2 workers for packing. Other workers for transfer of crude rye and product is not including in this