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Definition of water treatment

Water treatment refers to the process of improving water quality by adopting physical, chemical, biological and other methods in order to make water quality meet certain standards for use. Traditionally, water treatment mainly includes water supply treatment and wastewater treatment. The treatment of taking water from water sources such as rivers, lakes, and reservoirs for drinking is called water supply treatment. The treatment of used water is called wastewater treatment. With the increasingly serious water pollution, natural clean water resources are becoming more and more limited. From the perspective of comprehensive recycling and utilization of water resources, the boundary between water supply treatment and wastewater treatment is no longer very clear. Wastewater can be used as a water source, and after treatment, it can be used for industrial water or even domestic water. The emergence of terms such as reclaimed water, recycled water, etc. reflects this situation.

Categories of water treatment

On the whole, water treatment methods can be divided into two categories: physical chemical methods and biological methods (also known as biochemical methods). Among them, the physicochemical method usually includes three situations: (1) only physical changes occur during the treatment process; (2) only chemical changes occur during the treatment process; (3) both physical and chemical changes occur during the treatment process. Among the common water treatment technologies, coagulation sedimentation, filtration, air flotation, membrane separation, adsorption, ion exchange, magnetic separation, etc. are all physical and chemical methods; breakpoint chlorination, ozone oxidation, advanced oxidation, zero-valent iron reduction, etc. Belonging to chemical redox methods: activated sludge method, biofilm, membrane bioreactor, biological filter, etc. are all biological methods. In addition, most of the biochemical treatment technologies will produce excess sludge due to the use of activated sludge. The treatment and disposal of sludge belongs to the associated field of water treatment, especially sewage biochemical treatment.

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With the wide application of heat shrink packaging machines in various industries, it is becoming more and more popular. Its packaging efficiency and high-end packaging technology are deeply loved by various industries. Therefore, the demand for heat shrink packaging machines is increasing. Therefore, how to choose the right heat shrink packaging machine is also very important! As the pioneer of heat shrink packaging machine, we teaches you how to choose the right heat shrink packaging machine for you!

1. Determine the size of your item.

Different models of shrink wrapping machines have different sizes of shrink furnaces, so you can choose the most suitable one after determining your own size.

2. Determine the form of the items you want to pack.

Generally speaking, there are two types of packaging, one is fully enclosed and the other is cuff type. The closed type is all wrapped, such as milk or cosmetic boxes on a plate, and the cuff type is a small opening on both sides, which is generally used for beverages, mineral water, beer, etc. These two shrinking machines are different, so be sure to determine the packaging form of your items.

3. Determine the packaging film you use.

There are generally three kinds of packaging films, POF, PE, and PVC. Generally speaking, PE film is the thickest and is generally used in beverages. POF and PVC are generally used in cosmetics, gift boxes, mobile phone boxes and other items. The price of the PE film shrinking machine is relatively high, and the others are relatively cheap. The PE film shrinking machine can shrink other films, but it cannot be sent, because when the PE film shrinks other films, the temperature can be lowered and the speed can be accelerated. But in turn, not only affects the speed, the effect is not ideal.

4. Heating method.

The heating method of the shrinking machine is different, some are quartz tube heating, and some are steel pipe heating. The former is cheaper and the latter more expensive, but the quartz tube is a wearing part in the shrinking machine, and it is easier to damage, but the steel pipe is not easy to damage.

5. Look at the load-bearing capacity of the shrinking machine.

According to the different items to be shrunk, the load-bearing capacity of the shrinking machine is also different. Some are up to 20KG and some are 50KG. Therefore, you must pay attention to the problem of load-bearing when purchasing. If the load-bearing is too light, the service life of the machine will be greatly shortened, or even impossible to use, if it is too heavy, the cost will increase.

6.Shrinkage effect.

If you can, you can bring your own items to our factory for a test to see if the effect is ideal.

Of course, the specific situation is analyzed in detail, and the situation varies from person to person. Therefore, according to the industry you are in and the products to be packaged and the output, it is recommended to go to the manufacturer to inspect the entity to see if it can meet your own requirements!

In packaging machinery and equipment, shrink packaging machines are more and more widely used, such as large-scale heat shrinkable film forming packaging in catering, biscuits, pharmaceuticals, beverages, digital, food, hardware and other industries. After the shrink packaging machine is used, it is very important to do effective maintenance work, which can effectively reduce the unnecessary loss of the equipment, and prolong the life of the machine, bringing greater benefits to the enterprise. The following is the daily maintenance and maintenance method of the shrink packaging machine.

1. Lubricate all parts of the equipment during the work of the shrink packaging machine, regular cleaning of the parts and daily basic maintenance can effectively reduce the friction of the parts and prolong the service life of the equipment;

2. In the working parts of the shrink packaging machine, the reducer is an important component of the equipment. The reducer is strictly prohibited from running without oil. After the first 300 hours of operation, clean the interior and replace it with new oil, and then change the oil every 2500 hours of operation;

3. During the handling process of the shrink packaging machine, it is not allowed to be tilted and impacted, and it cannot be tipped down for handling. There must be a reliable grounding device during installation.

4. Regular inspection of the shrinking machine: After the end of each day’s work, the blade and peeling agent must be cleaned with a wire brush, and the moving parts must be lubricated frequently. It should be checked regularly, and parts with serious aging should be replaced as appropriate.

5. Power value: Pay attention to the indications on the nameplate of the heat shrinking machine. The input power must be greater than or equal to the indications on the nameplate during actual operation to prevent the internal circuits or machine parts of the heat shrinking machine from being burned.

6. The power-on environment of the heat shrinkable machine: when working, first ventilate and then power on, and when shutting down, first cut off the gas and then power off.

7. Environmental conditions: The heat shrinking machine should be used in an environment where the temperature is -10°C-50°C, the relative humidity does not exceed 85%, and there is no corrosive gas in the surrounding air, no dust, and no explosion hazard.

8. Placement position: It must be placed horizontally during installation to protect the normal operation of the electric heater and ensure its service life. If the installation angle of the mesh belt conveyor is not good, the center will be offset.

9. the clean environment of the shrinking machine: the heating strip and the silicone strip should be kept clean, and no foreign matter should be stuck, so as not to affect the sealing quality.

Production efficiency and quality are the keys for enterprises to obtain more profits, so enterprises have relatively high requirements for the stability of shrink packaging machines. We are a domestic manufacturer of automatic packaging equipment. The packaging equipment produced by high-tech products has a wide range of products, complete specifications, quality and thoughtful service. It provides high-quality products to domestic and foreign users and wins praise from users at home and abroad.

Problem 1: Wrong sealing and cutting position

The position of the sealing line should be at the general position of the package height

Solution: 1. The height of the conveyor belt of the sealing machine is incorrect, and the height of the conveyor belt can be adjusted to the appropriate position; 2. The height of the sealing frame is incorrect, and the height of the sealing frame can be adjusted to the appropriate position; 3. The circulating air direction of the shrink packaging machine is incorrect , the circulating air direction can be readjusted; the shrink bag of the 4-wrapped package is too large, and the size of the shrink bag can be reduced a little.

Problem 2. Crush the package

The packaging is pressed to the shrink film to deform or crush

Solution: 1. The temperature of the shrink packaging machine is too high, and the temperature can be lowered; 2. The speed of the conveyor belt of the shrinking machine is too slow, and the speed of the conveyor belt can be increased; 3. The size of the shrink bag is enlarged a little; 4 The shrink film used in 4 has too much shrink tension and is not suitable for the package, so use a shrink film with a lower shrink tension.

Problem 3. Zipper-shaped hole

There are zipper-like intermittent holes on the surface of the shrink film

Solution: 1. Tear the shrink film by the venting device, check the venting device of the sealing machine; 2. The number of venting holes is not enough, and the number of venting holes can be increased.

Problem 4. The sealing and cutting position becomes filamentous

Filaments appear at the sealing and cutting position

Solution: 1. The temperature of the heat-sealing knife of the sealing machine is too low, and the temperature of the heat-sealing knife can be increased; 2. The sealing and cutting time is too short, and the sealing and cutting time can be increased.

Looking for premium shrink wrap packaging machine?

We are not only a machine manufacturer, we can also supply turnkey project according to customers’ request, including workshop design, machine layout design, water, gas, electic cable layout design, label and bottle design. We can provide you with a filling and packaging solution. If you have any solution for shrink wrap packaging machine, please do not hesitate to contact us.