Customized manufacturer of heat exchanger cleaning agent

Customized manufacturer of heat exchanger cleaning agent

Cleaning methods for heat exchangers

【 1. Mechanical cleaning method 】

The mechanical cleaning method relies on the flow of fluid or mechanical action to provide a force greater than the adhesion force of dirt, causing the dirt to detach from the heat exchange surface.

There are two types of mechanical cleaning methods:

One type is the strong cleaning method, such as water spray cleaning, steam spray cleaning, sandblasting cleaning, drill bit descaling, etc;

Another type is soft mechanical cleaning, such as wire brush cleaning and rubber ball cleaning.

Below are several types of methods:

Spray cleaning is a descaling method using high-pressure water spraying or mechanical impact. When using this method, the water pressure is generally 20~50MPa. Now there are also higher pressures of 50-70Mpa being used.

Spray cleaning, similar in design and operation to spray cleaning, is a device that sprays steam into the tube and shell sides of a heat exchanger to remove dirt through impact and heat.

Sandblasting cleaning is the process of using compressed air (300-350kPa) through a spray gun to generate a linear velocity of * on sieved quartz sand (usually with a particle size of 3-5mm), flushing the inner wall of the heat exchanger tube, removing dirt, and restoring the original heat transfer characteristics of the tube.

Drill bit descaling, this cleaning machine is only suitable for cleaning dirt inside pipes or cylinders. Install a descaling drill bit at the top of the flexible rotating shaft, and rotate the drill bit by compressed air or electricity (some also use water or steam).

Rubber ball cleaning is carried out using a shot blasting cleaner. The shot blasting cleaner is composed of a sponge ball and a fluid spray gun that pushes the ball into the inside of the pipe to be cleaned. The ball is shaped like a shell and is extruded from a semi hard foam polyurethane sponge, which is elastic.

Customized manufacturer of heat exchanger cleaning agent【 2. Chemical cleaning method 】

The chemical cleaning method involves adding descaling agents, acids, enzymes, etc. to the fluid to reduce the adhesion between dirt and the heat exchange surface, causing it to peel off from the heat exchange surface.

The current chemical cleaning methods used are:

Circulation method: Use a pump to force the cleaning solution to circulate for cleaning.

Immersion method: Fill the equipment with cleaning solution and let it stand for a certain period of time.

Surge method: Fill the equipment with cleaning solution, discharge a portion of the cleaning solution from the bottom at regular intervals, and then reinstall the discharged liquid into the equipment to achieve the purpose of stirring and cleaning.

The advantages of chemical cleaning compared to mechanical cleaning are:

It is not necessary to disassemble the equipment to clean areas that cannot be mechanically cleaned. Chemical cleaning is uniform and even, and even small gaps can be cleaned without leaving any deposited particles. The formation of new scale cores can avoid damage to the metal surface.