What to do to prevent moisture in refrigerated warehouses 2012

Now the newly built cold storage is how many assembled cold storage, that is, the cold storage is assembled into the cold storage body with the cold storage board. The main materials of cold storage board are polyurethane and polystyrene. The moisture-proof ability of polystyrene board is not good, so it is recommended to use polyurethane library board.

The polyurethane library board is made of polyurethane as the core and then clamped with two layers of protective plates, and has the ability of heat preservation, moisture resistance, steam resistance and corrosion resistance. The cold storage assembled with polyurethane can be moisture-proof as long as the storage body is protected, the library board is damaged or deformed, and the cold storage door is sealed. The construction of the cold storage body is also made of polyurethane or polystyrene foam spraying, but the construction is cumbersome and the cost is high, so it is better to use the library board.

1. Due to the humid air, it is difficult to dry anything, so the warehouse should be cleaned with wet rags and wet mops according to the situation, and dry rags and dry mops should be used more.

2. Because the water vapor in the air is easy to condense into water droplets when it encounters tiny particles, it is necessary to keep the goods and the ground clean, without more dust, and reduce the formation of water droplets on the surface.

3. Humidity observation should be carried out outside the warehouse, when the humidity in the warehouse is higher than 15 degrees outside the warehouse, the ventilation window and ventilation groove should be opened in time for ventilation, otherwise the warehouse must be closed.

4. Lime is an adsorbent, 1 kg of quicklime can adsorb about kg of moisture in the air. On rainy days, quicklime can be wrapped in cloth or sacks and placed in various places in the warehouse to keep the indoor air dry.

Precautions for the use of warehouses.

The storage scheme of the warehouse determines the placement of the storage shelves, the placement of different storage shelves is related to the pattern of different warehouses, the ventilation of the rainy season is also an important part of moisture-proof, and the good warehouse shelves can have a good ventilation effect, so that the warehouse can have better ventilation conditions to avoid warehouse mildew.

The warehouse is used to place a variety of different goods, and the placement of goods is also related to the moisture-proof of the warehouse. Heavy-duty beam shelves need to use shelves, which need to be placed neatly when placing goods, and the bottom layer also needs to use beams, which cannot be placed directly on the ground.

The basement wall should be built with cement mortar, the ash joints must be full, and two horizontal moisture-proof layers of the wall should be set up on the basement floor and the first floor, and the outer perimeter of the basement wall should be backfilled with poor permeability of the soil layered and tamped.

1.When the design maximum groundwater level is higher than the top surface of the basement floor, it must be waterproofed, and internal waterproofing is generally used for repair works.

2.During the construction of membrane waterproofing, the waterproofing of the basement floor should be done first, and then the membrane should be continuously pasted to the outer surface of the wall along the basement floor. Basement floor waterproofing begins with a C10 concrete cushion poured at the base with a thickness of about 100mm.

Then paste the coil, then wipe 20 thick 1:3 cement mortar on the coil, and finally pour the reinforced concrete bottom plate.

3.The outer surface of the wall is first smeared with 20mm thick 1:3 cement mortar, cold bottom oil, and then pasted with coil, the paste of the coil should be staggered, and the lap width of the adjacent coil is not less than 100mm. The top part of the membrane should be about 500mm higher than the highest water level, and the outer side should be built with half a brick parapet.

Humid air will cause different degrees of damage to the materials and finished products in the warehouse, and will cause the goods to be scrapped in serious cases.

When the weather is rainy or humid, the warehouse should be cleaned with a wet rag and a wet mop according to the situation, and more chicken feather sweeps, dry rags and dry mops should be used.

Because the water vapor in the air is easy to condense into water droplets when it encounters tiny particles, it is necessary to keep the goods and the ground clean, and regularly organize and arrange the dust removal of warehouse goods and shelves for 5S and check the implementation of the implementation.

Humidity observation inside and outside the warehouse, when the humidity inside the warehouse is higher than 15 degrees outside the warehouse, open the ventilation window, ventilation groove and other ventilation in time, if it is lower than 15 degrees, the warehouse doors and windows must be closed to reduce the outdoor humidity gas into the warehouse.

Please store some moisture-proof and water-absorbing lime powder in each warehouse to absorb moisture in the air. Avoid moisture in materials, especially in wooden box warehouses.

For the electronic warehouse, a powerful fan can be turned on, and there are currently two to strengthen the air convection in the electronic warehouse and reduce the condensation of water droplets.

For wooden box materials, the outer packaging or film must be sealed when storing the warehouse, and whether there is mold should be checked regularly, and if there is, rework should be arranged immediately and pulled to the dehumidification room for drying.

When the humidity is high, warehouses with exhaust fans should keep the fans on.

For heavier goods in the box, the stacking height should be reduced as much as possible, such as the stacking is higher, the outer box becomes soft due to moisture, and the bearing capacity decreases, which is very easy to cause the corner of the outer box to crack due to heavy pressure. For example, the finished product E-9A10 was stacked too high due to the storage capacity. Causes the lowest layer to deform.

When inspecting the goods at ordinary times, the sealing tape of the outer box of the goods should be carefully checked, and the surface of the goods is damp and the sealing tape will first condense very fine water droplets, once found, employees must be organized to wipe and other dehumidification measures.

All materials and finished products must be loaded with pallets and cannot be stacked directly on the ground.

The moisture-proof and air-insulating materials commonly used in cold storage design include petroleum asphalt, linoleum, asphalt waterproof plastic and polyethylene plastic film. Among them, petroleum asphalt has good waterproof vapor performance, and has certain elasticity, low temperature resistance, and stable moisture-proof and gas-proof performance. If used in combination with linoleum, it can achieve a good moisture-proof and air-insulating effect.

Plastic film has good air permeability, low water absorption, high mechanical strength and good flexibility, but poor aging resistance and low temperature resistance. At present, most cold storage is still designed with asphalt and linoleum as moisture-proof air barriers.

1. Asphalt and linoleum moisture-proof and air-insulating materials.

Petroleum asphalt is a kind of moisture-proof and air-insulating color material with stable performance, strong adhesion and excellent moisture-proof performance, and often forms one felt and two oils or two felt and three oils with linoleum. The moisture-proof and air-insulating material of the cold storage floor is generally selected as No. 60 petroleum asphalt, and the exterior wall and roof are selected as No. 10 30 petroleum asphalt. Linoleum choose 350 500 g of petroleum asphalt linoleum.

2. Moisture-proof and air-insulating materials such as plastic films.

There are polyethylene (PE) and polyvinyl chloride (PVC) films. The performance of polyethylene films depends on the resin density, melt flow rate, and molding method. The film used in the cold storage design must have high tensile strength, tear strength, impact strength and excellent air tightness.

Polyethylene films are generally bonded using polyvinyl chloride adhesives. Polyvinyl chloride is a kind of moisture-proof and air-insulating color material with excellent luster, transparency, anti-odor penetration, and air tightness, usually using a thick PVC transparent film.

Warehouse moisture-proof method: control the temperature and humidity, water droplets and water vapor will be formed indoors, because the indoor humidity is about 15 degrees higher than the outdoor humidity. Because it is necessary to control and monitor the humidity in the room.

Two humidity measuring instruments are placed on both sides of the room for easy monitoring. Warehouse moisture-proof method: Placing lime, as we all know, lime has an adsorption capacity to absorb moisture placed in the air.

Spread moisture-proof foam on the floor and you'll be fine.

If the warehouse wants to prevent moisture, one is to add herbicides, and the other can be padded with some moisture-proof boards at the bottom layer, and so on.