Inorganic wet film humidification unit

GLASdek2 type wet film humidifier (pure type) features:

The wet film humidifier adopts GLASdek inorganic wet film material with good water absorption, long service life, and strong fire resistance

It has properties such as resistance to mold, bacteria, high temperature, and freezing.

The humidifying material can be cleaned and reused multiple times.

Humidifier materials have the ability to resist softening and deformation; Service life ≥ 5 years

Prevent water from splashing due to the airflow of the air conditioning unit, resulting in water overflow (or effective measures to prevent water overflow).

Ø Ensure the overall mechanical strength and membrane body of the wet film humidifier do not collapse, the frame is made of stainless steel material, and the overall mechanical strength is required to fully meet the air pressure requirements of the air conditioning unit;

Ø Configure automatic control and display

When using wet film, the humidity control range in the workshop is 55% ± 5%, and the humidity is independently controlled.

It can measure and display the relative humidity of the workshop air.

※ Water pump protection and water shortage protection. Fault alarm.

The humidity measurement and control system includes humidity sensors, measurement and control electrical control boxes, cable signal lines, and cable trays, etc

Ø Have safe hygiene measures in place

Wet materials have excellent antibacterial properties or effective antibacterial measures.

Ø Easy to repair

The circulating water pump is easy to maintain and install outside the air conditioning room, and the connection between the pipeline and the air conditioning must be sealed properly.

The humidified air has no adverse effects on the workshop.

Ø Circulating water tank

The circulating water pump is located outside the air conditioning room;

The water tank is made of stainless steel material with a thickness of ≥ 1.5mm;

The water tank level is controlled by a float valve, which automatically controls the water inlet;

The water tank is designed with automatic timed drainage, controlled by liquid level sensors and solenoid valves;

2、 Circulating water wet film humidifier

1. The principle of circulating water wet film humidifier

Clean tap water enters the circulating water tank through the inlet pipeline, and its high water level is controlled by the inlet switch; When the humidifier is working, the circulating water pump delivers the water in the water tank to the water sprayer at the top of the humidifier. The water sprayer ensures that the water is evenly distributed to the wet film material, and the water penetrates downwards from the top of the wet film material while being absorbed by the wet film material, forming a uniform water film; When dry air passes through a humidifier, a portion of the water comes into contact with the air, vaporizes and evaporates, making the air moist (i.e. increasing humidity); The other part of the water that has not evaporated flows back to the circulating water tank from the lower part of the humidifier; The water in the circulating water tank is repeatedly circulated by the circulating water pump, thereby humidifying the air passing through the wet film. When the water level in the circulating water tank drops, the water inlet switch is turned on to replenish water to the tank, ensuring that the water level in the tank is maintained within the set height range. When the water level in the circulating water tank drops to a certain height, the low water level switch in the tank works to ensure that the circulating water pump stops running in case of water shortage. After the water in the circulating water tank circulates for a certain period of time, the water is discharged through the drainage port of the tank to clean the tank and replace the clean water, ensuring that the circulating water and humidified air are not contaminated again.

2. Model of direct drainage wet film humidifier

SFMX—mm—W×H-L/R

SFMX: Wet Fu Direct Drainage Wet Film Humidifier

Mm: thickness of wet film material

W: Effective width of surface cooler (mm)

H: Effective height of surface cooler (mm)

L/R: L left type R right type

3. Wind resistance and saturation efficiency table of wet film humidifier

4. Calculation and selection of wet film humidifier

1) Select based on humidification capacity

Formula for calculating humidification amount

W=Q · P · 1.2 · (d2-d1) (fresh air)

W=Q · P · 1.2 · fresh air ratio · (d2-d1) (partial fresh air)

In the formula: W: effective humidification capacity (kg/h)

Q: Air conditioning unit air volume m3/h

P: Air capacity 1.2 kg/m3

D1: Moisture content of air before humidification kg/kg (enthalpy and humidity chart to be checked)

D2: Humidity content of humidified air kg/kg (enthalpy and humidity chart to be checked)

1.2: Safety factor

● Example

A certain working condition: Q=15000 m3/h (fresh air) t1=40 ℃ Φ 1=15% RH before humidification

The size of the surface cooler is 1000mm × 1600mm. After humidification, t2=28 ℃ and Φ 2=50% RH

5. Calculate the humidification amount according to the formula:

W=Q·P·1.2·(d2－d1)

W＝15000×1.2×1.2×（0.012－0.007）

＝108 kg/h

According to the calculation results, the corresponding wet film thickness in the eighth quick selection table is 200mm.

After selecting the wet film thickness, the head-on wind speed should also be calculated as follows:

V=Q ÷（S×3600）=15000÷（1.6×3600）=2.6m/s

V: Facing wind speed (m/s)

S: Effective area of humidifier (m2)

Note: The head-on wind speed (V) should be ≤ 2.8m/s. If it is>2.8m/s, a water deflector should be installed.

2. Select based on saturation efficiency

Formula for calculating saturation efficiency

η: Saturation efficiency

η=（d2－d1）÷（dmax－d1）×100%

D1: Humidity before humidification * * (kg/kg)

D2: Humidity after humidification * * (kg/kg)

Dmax: saturation * * humidity (kg/kg)

● Example

The operating conditions are the same as above. Calculate the saturation efficiency according to the formula:

d2－d1

η= （d2－d1）÷（dmax－d1）×100%

=（0.012－0.007）÷（0.013－0.007）×100%

=83%

According to the calculation results, the corresponding wet film thickness in the seventh item of wind resistance and saturation efficiency table is 200mm. After selecting the wet film thickness, the head-on wind speed should also be calculated using the same method as above.

6. Module structure of wet film vaporization humidifier

The production of wet film vaporization humidifiers is determined by the size of the heat exchanger area to determine the structure of the module. The module structure of a wet film humidifier is divided into:

Individual module structure; Single layer multi module structure; Multi layer and multi module structure.

Width of heat exchanger ≤ 1500mm; height ≤ 1800mm, individual module structure

Width of heat exchanger ≥ 1500mm; height ≤ 1800mm single-layer multi module structure

The width of the heat exchanger is ≥ 1500mm; the height is ≥ 1800mm, with a multi-layer and multi module structure

Double layer water tank structure with a height of ≥ 2500mm for heat exchangers

7. Precautions for the use and maintenance of wet film humidifiers

1. When using the circulating water supply method, an overflow valve is installed at the water separator. The opening amount of this valve and the water supply metering valve have been adjusted at the factory and cannot be adjusted arbitrarily, otherwise it may shorten the service life of the water pump or cause it to burn out.

2. Regularly clean the filter, water tank, and filter mesh in the water tank, especially the filter mesh in the water tank. If it gets clogged, it may cause the water pump to start frequently, resulting in a shortened or burnt life of the water pump.

3. After several years of use (usually around three years depending on the local water quality), if it is found that the humidification efficiency has decreased and the surface of the wet film has accumulated severe alkali, it can be removed and cleaned with high-pressure water, or contact the manufacturer for professional cleaning services. If using wet film of other materials, replacement may be considered. It can also be used in conjunction with water treatment equipment to extend its service life or cleaning cycle. You can contact the manufacturer to place an order.

4. It is recommended to use a circular water supply method, which can save more than 60% of water resources.

Case picture:

8. The usage conditions of wet film humidifier:

Sectional wind speed: ≤ 2.8m/s,>2.8m/s requires the addition of a water deflector.

Water quality: tap water or equivalent.

Water supply temperature: 3-45 ℃

Water supply pressure: 0.05-0.4Mpa

Inlet air temperature: 5-60 ℃