Introduction to cleaning and descaling agents for heat exchanger plates in heat exchange stations

Introduction to cleaning and descaling agents for heat exchanger plates in heat exchange stations Introduction to cleaning and descaling agents for heat exchanger plates in heat exchange stations

1、 Introduction to cleaning agents

Heat exchanger cleaning agent is a chemical cleaning agent designed specifically for cleaning various types of heat exchangers. Heat exchangers are widely used in fields such as petroleum, chemical, power, and medicine. Due to various reasons, heat exchangers are often plagued by various dirt and deposits during use, affecting their normal operation. And heat exchanger cleaning agents are an important tool to solve this problem.

2、 Composition of cleaning agent formula

The formula for heat exchanger cleaning agents mainly consists of surfactants, organic acids, salts, corrosion inhibitors, complexing agents, and stabilizers. The following will introduce these main components one by one:

Surfactant: Surfactant is the main component of cleaning agents, which can reduce the surface tension of solutions, separate dirt from metal surfaces, and promote the dissolution of dirt. Common surfactants include fatty acid salts, sulfates, etc.

Organic acids and salts: These components can react with calcium, magnesium, and iron ions in dirt, causing the dirt to decompose and fall off. Common organic acids include citric acid, oxalic acid, and so on. Salts and other substances can also be used to enhance cleaning effectiveness.

Corrosion inhibitor: Corrosion inhibitors are used to prevent corrosion of metal surfaces during the cleaning process. It can adsorb onto metal surfaces, forming a protective film that prevents acidic substances from coming into contact with the metal, thereby protecting the metal from corrosion. Common corrosion inhibitors include benzotriazole and others.

Chelating agent: chelating agents are mainly used to chelate heavy metal ions in dirt, so that they no longer combine with acidic substances to form insoluble salts, thereby avoiding corrosion of metal surfaces. Common chelating agents include ethylenediaminetetraacetic acid salts.

Stabilizer: The function of stabilizers is to stabilize the chemical properties of cleaning agents and prevent them from deteriorating during storage and use.

3、 Preparation method of cleaning agent

The method of preparing heat exchanger cleaning agent is relatively simple, mainly by mixing the above components together in a certain proportion and thoroughly stirring them to fully dissolve and mix them. The specific preparation method is as follows:

Firstly, add the surfactant to clean water and stir evenly;

Then, add organic acids and salts and continue stirring;

Next, add corrosion inhibitors and complexing agents to ensure that all components are fully dissolved;

Add stabilizer and stir evenly again to obtain the cleaning agent.

4、 Instructions for using cleaning agents

When using a heat exchanger cleaning agent, it is first necessary to dilute the cleaning agent in a certain proportion in clean water, then pour it into the heat exchanger, soak it for a period of time, and then perform cyclic cleaning. During the cleaning process, attention should be paid to controlling temperature and pressure to avoid damage to the equipment. In general, the cleaning time varies depending on the degree of dirt on the equipment and the material of the equipment. After cleaning, it is necessary to rinse the equipment thoroughly with clean water to ensure that there are no residual cleaning agents left inside the equipment.

5、 Advantages and precautions of cleaning agents

Heat exchanger cleaning agents have advantages such as high efficiency, environmental friendliness, and safety. It can quickly and effectively remove dirt and sediment inside the equipment without causing corrosion or damage to the equipment. During use, it is important to control the concentration and temperature of the cleaning agent to avoid unnecessary damage to the equipment. In addition, suitable cleaning agent formulas and process conditions need to be selected for different heat exchanger materials and degrees of fouling.