what is the installation experience for wheat flour mill machine?
Wheat flour mill machine is numerous now. In order to improve work efficiency and the quality of the project, it is necessary to carefully read the drawings and investigate the site before installation in order to determine a better construction plan. In the operation process, it is necessary to fully integrate the actual conditions at the site, rather than blindly carrying out the blanking and wheat flour mill machine layout according to the design drawings. At the same time, attention must be given to the safety of personnel and wheat flour mill machine during construction and installation.
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| wheat flour mill machine installing |
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| steel stainless pipes in wheat milling section |
As you kown, in China, we have so many wheat flour mill machine plants. The "Twelfth Five-year Development Plan for the Food Industry" issued by the National Development and Reform Commission and the Ministry of Industry and Information Technology anticipates that by 2015, the proportion of the output of the enterprises of wheat flour mill machine above 400t/d will increase to more than 65%, compared to 2010. With an increase of 15 percentage points, for me, processing capacity of the single-line wheat flour mill machine that has participated in the installation and commissioning for these years has reached a minimum of 400 t/d, and at least two production lines of wheat flour milling machines have been started at the same time. This trend of development of wheat flour mill machine has brought tremendous development opportunities to the flour equipment installation industry. At the same time, it also raises higher requirements and challenges for installation.
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| wheat milling section installing |
1. Wheat flour mill machine Installation Requirements and Difficulty.
The quality of the installation project must not only meet the general standards of the country and industry, such as: GB50300-2013 "Unified Standard for Acceptance of Construction Quality of Construction Projects", GB 50231-2009 "General Specification for Construction and Acceptance of Machinery Installation Engineering", etc., but also to meet the construction Special requirements of the unit. In the premise of ensuring the use of functions, operation and maintenance convenience, companies will also put forward strict requirements on the overall external appearance. We may unilaterally believe that the installation of the wheat flour mill machine is nothing more than fixing the main and auxiliary equipment in place according to the floor plan, and determining the direction and elevation of the pipeline according to the section and elevation drawings. In fact, it is not entirely true that since there are no specific standards and specifications for the installation of food machine equipment, many practices in the installation process are based on the experience of other projects. This requires practitioners to have a wealth of experience in installation and commissioning. In addition, because every equipment in the flour mill does not exist in isolation, its related equipment is matched with its front, rear, top, bottom, and right sides. This requires the installer to have a holistic view and establish the overall thinking before proceeding with the installation. Clear the connection between the equipment and must not start blindly. The difficulties in the installation of flour mills are mainly concentrated on the following two aspects: First, the process is complicated and the pipelines are numerous. The modern milling process advocates subdivision and reinforcement of grading, especially for the high-sift sieves of powders. It is not an exaggeration to describe it as “many as a cow's hair”, but also adds a large number of tees and buckets. It is easy to pick up mistakes, and there may be spatial conflicts between the pipes. The other major reason is that the pipes in the flour mill have installation angle requirements. Since the raw materials, work-in-process, finished products and by-products of the flour mill all have their own self-slip angles (27 to 31 degrees for wheat, 37 to 44 degrees for intermediate milling, 40 to 44 degrees for standard powder, and 37 to 40 degrees for bran) Therefore, the first task of pipeline installation is to ensure that the materials can be smoothly circulated, and secondly, consider beauty.
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| plan sifter |
2. Wheat flour mill machine Installation Example.
1) Installation of the screw conveyor under the warehouse in the warehouse of the cleaning section (see Figure 1)
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| drawing fro cleaning section of wheat flour mill |
2）The installation height and installation position of the conveyor are often marked on the construction drawings. This is understandable and is also indispensable for a complete design drawing. However, during construction, the installer may prepare the conveyor bracket in advance according to the dimensions indicated on the section and elevation drawings, ignoring the actual situation at the site. The size on the drawing sheet is an ideal case, but the civil construction will inevitably produce some changes in the construction process (floor thickness error, ground floor elevation error, etc.), and sometimes even large changes, giving Subsequent equipment installations have caused difficulties. In order to prevent the automatic grading of the materials when they flow out, the cleaning warehouses are often designed as multiple outlets. All the outlet chutes are collected into one bucket and then flow into the screw conveyor through the feeders, so the upper end of the conveyor must be adequate The height is used to install the collecting bucket and the feeder, but the conveyor cannot be installed too low because it also feeds down the elevator. Therefore, the exit height of the conveyor can be installed as low as possible under the premise of satisfying the self-skidding angle of wheat, so as to leave enough space for collecting buckets and feeders, as well as convenient daily management and overhaul, but not necessarily complete. Make and install according to the height of the drawing.
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| wheat flour milling pipes |
2) Installation of the top-level warehouse scraper at the top of the vertical silo for wheat flour mill machine factory. (see Figure 2)
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| silo |
The roof of the general storehouse is open air, and the reserved holes must not be arbitrarily changed. After the change, it may cause water in the storehouse, resulting in mildew in the food. On the other hand, today's vertical storage capacity is in the direction of large-scale development, with a capacity of 10,000 tons at a time. Due to the large number of target warehouses and long transportation distances, squeegee machines are often arranged in sections. The previous squeegee feeds the back one, and the material of the same squeegee may have to enter two or even more rows. In order to save material, the scraper is often installed in an inclined manner, the feed inlet is low and the discharge outlet is low, and each discharge outlet is provided with a slide deformation member and a pneumatic shutter. The technical requirements and characteristics mentioned above for the scraper completely determine its minimum installation height. Below the minimum installation height, the self-slip angle of wheat cannot be guaranteed. Therefore, when determining the installation height of the scraper, it is necessary to know in advance the actual situation on the site (reserve the correct hole position, what targets the material in the scraper should enter, etc.), rather than blindly according to the profile, elevation The brackets on the dimensions indicated above may cause changes in the actual installation height if there are errors or errors in the construction of the civil works. This results in wasted material and labor during rework.
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| cleaning section |
3) Precautions for Installation of Certain Specific Wheat Flour Milling Machine.
Due to the structural characteristics and working principles of the equipment itself, during installation, it is not possible to damage its vulnerable parts. Second, it is necessary to ensure the basic conditions required for its normal and stable operation. Some precision equipment, such as weighing scales, gravity feeders, balers, and water controllers, are equipped with sensing devices. When installing, they must avoid strong electric fields, magnetic fields, and high temperature environments. Welding or gas cutting Pay attention to protection. In addition, the installation must be adjusted horizontally, firmly installed to avoid shaking, to ensure the accuracy of its measurement, the device's bracket or base should be self-contained, can not be shared or connected with other brackets in order to ensure the accuracy of the sensor operation, such equipment requires upstream The incoming flow is stable, so the upper end generally requires the installation of buffer buckets or buffer elbows to reduce the impact of incoming materials and ensure the stability of the flow. Take the water controller as an example (Figure 3)
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| flow chart for water controller |
It is the flow chart for water moisture.
The traditional process between wheat is to remove the hairy wheat from the lifter to the top floor after being cleared by a lifter, and then enter the water control instrument to measure the real-time flow and initial moisture content of the wheat. The control instrument is then set according to the artificially set target. The water content determines the amount of water added to the machine. From the controller's test, it was found that there was a time difference between the change of the wheat flow rate and the instruction of the solenoid valve to change the amount of water added. If the flow rate of the incoming material is unstable, the amount of water added will be inaccurate, which will affect the grinding and screening effect during milling. In addition, when the water control instrument detects the initial moisture content of the wheat, it requires the material level of the wheat in the hopper to be maintained at a certain height so that the detection probe can detect it. If the material level is too high or too low, the gate below the hopper will be correspondingly Adjust the degree of opening to maintain the level of wheat in the hopper. If the upstream incoming flow cannot be maintained at a stable level, the opening degree of the gate will change frequently. The change of the gate opening degree will be recognized by the probe first. Information feedback to the microjet space may cause the hoist to block material, causing the system to stop. Details such as these are easily overlooked and it is difficult to fully express them on the drawings. This places high demands on the quality of managers and installers.
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| cyclone and air seal |
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| pipes |
3. Safety issues during construction for the wheat flour mill machine.
The last and most important thing is the safety during installation, including the safety of people and equipment. When welding or gas cutting, pay attention to the personnel and equipment below the operating point. When leaving the site, the personnel must cut off the power and air supply in time, and arrange full-time personnel to visit after work. Personal safety is a top priority. Even if the installation of the project is flawless, it will be a one-vote veto if there is a security incident. Especially in the initial stage of installation, equipment and pipelines are still not in place, and many holes are reserved. It is imperative that holes and edge protection and warning work be done. At the same time, training should be strengthened to provide safety education for construction workers and improve their performance. Its own safety awareness.
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| air seal |
The installation of flour equipment requires practitioners to have a holistic view and clear ideas, and be able to flexibly adjust the construction plan according to the actual situation on the site. It is by no means mechanically based on the design drawings to carry out equipment and pipe connections. Under the basic premise of fulfilling the function, it is necessary to strive to achieve a rational arrangement of equipment and a beautiful pipeline. Problems not found and resolved during the installation process will be exposed during the debugging process, especially when debugging with tape. Because there are materials in the pipeline when carrying materials, the changes at this time will take more time and effort. Therefore, it must be taken seriously during installation, problems that can be found and solved, and they should be handled during installation as much as possible. Only when you are debugging can you be confident and comfortable.
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| flow balancer |
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| automatic roller mill |
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| pipes |
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| steel stainless pipes |
if you want to buy the wheat flour milling machines, most welcome come our factory (Hongdefa Machinery )we can show you the running wheat flour mill plant for you, you can see all the machines running and all the final products quality.
my contact is
Mrs. Jane Liu for flour milling machines.
M: +86 132 2344 2174 (whatsapp/viber/imo/wechat)
www.hdfmill.com
waiting for your inquiry!
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