HUMIDIFICATION WITH MISTING
Moisturize using high pressure fogging is applicable to any field, whether it is an open space, indoors or hydration in the duct. Flexibility of the system allows its use in any desired form, with much smaller investments, as compared to conventional techniques of humidification.
Benefits of humidified air
Many industries require the maintenance of the required level of relative humidity in living and working areas for a comfortable location is required to maintain the humidity at 40-60%. Humidified air contains less dust and static electricity. This improves the quality of products in printing, textile , wood, tobacco, brewing, tanning industries. Humidified air reduces losses during storage of vegetables in the production of eggs and poultry breeding , when growing plants in greenhouses , with wine storage in barrels , increases the reliability of equipment in computer rooms. In the living and working areas humidification can improve human well-being, increase productivity, reduce the number of respiratory diseases.
Economic indicators misty moisture
The principle of high pressure mist humidification used in systems, allows you to quickly raise and maintain the humidity in the premises of any size. Fogging systems allow humidify the air with very low energy consumption per 1 kg of evaporated water - up to 100 times lower in comparison with steam humidifiers, up to 10 times lower in comparison with ultrasonic humidifiers and up to 7 times lower in comparison with vacuum nozzles. Fogging High pressure nozzles are cheaper than vacuum injector, wherein the injector further introduced into finished humidification system without significant cost. In general, the cost of installing misting systems is below 1.5-2 times and lower operating costs 8-10 times, due to the lack of powerful and voracious air compressors, fewer pipelines, fast and qualitative hydration. And pumps technology VAR can respond to changes in water consumption by increasing or decreasing the speed, saving energy and water.
One sprinkler can spray from 2.76 to 12.12 liters of water per hour, which consists of millions of small water droplets. Drops quickly evaporates and turns into steam. The standard system humidification nozzles evenly distribute moisture around the room or area. The system can be easily divided into several zones using the controller with humidity sensors. It is advisable to use water filtration systems before entering the high-pressure line.It will be increased nozzles.
Most woodworking begins with kiln-dried lumber containing 6% to 11% moisture content. Wood is hydroscopic in nature, readily absorbing and releasing moisture, depending on humidity levels. Wood that is stored and worked on in environemnts with stable humidity levels, ensures that the wood stays dimensionally stable and should give you relatively few manufacturing problems. However, retaining 11% moisture content in kiln-dried wood requires an RH level of 55% to 60%.
When air is heated, humidity levels often drop to as little as 10% RH or less. RH levels under 40% reduce moisture content in wood and lead to changes in wood dimensions, including shrinking or swelling, cupping or warping, and checking or splitting. Once the damage is done, it is usually impossible to correct it.
Static electricity problems in a woodworking environment occur when dry air causes surfaces to become charged with static electricity. It causes a variety of problems including dust fires and static explosions. In some cases, static electricity can also affect the way paints and finishes adhere to wood.
Gluing and laminating issues are common. Glues often do not cure as completely and uniformly in dry conditions. Ill-fitting pieces also are frequently subject to gluing problems. Dry air can often lead to glue joints separating or veneers popping off the base wood as dimensions change or pieces twist or “pop.”.
All of the above mentioned problems can be avoided or minimized by maintaining humidity levels at 40% to 60% RH in your woodworking environment including your office, warehouse, and manufacturing and finishing departments.
1. Lentelė. Medienos drėgnumo priklausomybė nuo aplinkos santykinės drėgmės.
Paiskeitus oro sąlygoms (temperatūrai, santykinei drėgmei) per tam tikrą laiką medienos drėgnumas pasiekia toms oro sąygoms būdingą drėgnumą. Šaltuoju metų laiku, kai naudojamos šildymo sistemos patalpos išsausėja ir dažnai pasiekia mažesnį nei 25% santykinė drėgmę. Medienoje vyksta desorbciniai procesai, dėl to atsiranda anskčiau minėtos problemos.
Paper & pulp, printing
Humidity control in the paper industry is essential to control the moisture loss of the paper after drying. Once produced and reeled, the paper can be exposed to ambient conditions at the end of the paper machine for considerable periods of time. Exposed surfaces of the paper will change in moisture content dependent on the ambient humidity, leading to problems during the slitting and wrapping processes.
Low humidity, below 50%, causes the paper to shrink, curl and lose dimensional stability making the reel of paper unusable and in turn very costly to the manufacturer. To stop this from occurring, the typical humidity level required is 55%rH. When this level is maintained the moisture in the paper maintains not only the flexibility of the product but also its stability during production and packing.
When humidity is below 45%RH static electricity will be generated, which can cause packing issues and prevent a risk to staff from unexpected shocks.
If the atmosphere around printing presses and paper storage areas becomes dry, the paper's exposed edges will suffer dimensional change, causing it to curl. A low humidity also increases static build-up, which can cause paper to stick together and not feed or stack correctly.
Static build-up in manufacturing environments often causes a reduction in productivity, a drop in product quality, safety issues with uncontrolled sparks, and physical damage to equipment, especially electronics and PCBs..
In order for friction to produce a static charge the air must be below 45%RH. Between 45-55%RH static will still build-up but at a reduced level as it leaks to ground through the moisture content of the air. Keeping the air at above 55%RH ensures static never builds-up.
Where this is the case, localised spray systems can be employed to raise the humidity in the local area. Individual nozzles located directly on machines can ensure temperature gains don’t encourage dry air and therefore static build-up..
It is important to keep a constant air humidity all year round, this ensures an homogeneous and optimum quality of the production materials, less stops in the production, less wastage and a better indoor clima.
For large environments like manufacturing lines, direct room humidifiers present an effective and economical solution. Atomising nozzles are mounted in the ceiling space and release a fine spray which raises the humidity to the required level.
Static problems are particularly prevalent in industries like packaging, printing, paper, plastics, textiles, electronics, automotive manufacturing and pharmaceuticals..
Humidification in textile manufacturing has many benefits that will enhance profitability:
preventing moisture loss during a textile’s processing and storage can reduce weight loss from a typical 4% to just 0.5%.
correct humidification will maintain yarn strength and elasticity, producing a better quality product with higher margins. Wastage is also reduced through a reduction in shedding.
Static can cause reduced productivity and product quality due to lint and fly attraction, machine jams and employee discomfort or even accidents. Higher humidity naturally dissipates static charges alleviating these problems.
optimal humidification reduces yarn breakages in weaving, reducing machine downtime as well as loom stop marks and weavers knots in the finished product.
humidifiers can deliver around 5°C of evaporative cooling to a textile production facility, while suppressing dust, fly and lint. This creates a healthier and more productive atmosphere for employees.
Food & beverage
Air humidity ensures a consistent quality level of goods in storage. As an example, fresh food remains crisp and attractive in storage and therefore sellable if circulating air is correctly humidified.
Optimal conditions vary according to the specific type of fruit, vegetables, flowers or other food product being stored but, typically, a humidity of around 95% RH at a temperature just above freezing is needed but, even produce stored in warmer conditions benefit from a humidity level around 75% RH. The required moisture is introduced directly into the air, evenly throughout the store
For the crop to reach the customer it has to be kept fresh and, in order to do this, the crop is cooled very rapidly to between 2 and 4°C. If the crop has been harvested at >20°C, the degree of cooling required to bring the crop to storage temperature will damage the crop.
To counter this, moisture is added during the chill down period.
By raising the humidity of the air around the carcasses to between 90-95% RH moisture loss from the meat is inhibited and weight losses can be reduced to less than 1%.
This will have an immediate impact on the profitability of an abattoir operation, as it can stop around 4kg of product evaporating from a typical side of beef during the chill down process.
Mushrooms love dark and humid environments. To cultivate mushrooms humidifiers are used to maintain an optimum air humidity of 95% RH
Humidifiers are required in data centres to prevent electrostatic discharge damaging servers and offer high capacity, low cost evaporative cooling.
For existing data centres ASHRAE recommends a humidity level of 5.5°C dew point to 60%RH and an allowable range of between 20-80%RH. In most parts of the world, at some time in the year, humidification will be needed to meet these internal conditions.
In colder locations, such as those where many new build data centres are being located, adiabatic humidifiers can be used to economically add huge volumes of moisture to the incoming air. Heat from the data halls is used to warm the incoming air prior to humidification increasing the moisture content and reducing the temperature to the necessary supply condition
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