What is a heat exchanger?
A heat exchanger is a device common to exchange heat between one or more heat carriers. Heat sinks may be separated by tubes or plates to prevent mixing or direct contact between the heat carriers. Heat exchanger between two media:
- First, liquid-liquid.
- Second, gas (vapor)- gas (vapor).
- The last one is liquid
Heat exchanger application
The heat exchanger is an important piece of equipment and is widely common in many different fields. When compared to more traditional cooling systems, they utilize substantially less energy and emit pollutants. The following are common applications of heat exchangers:
- Firstly, steam heating,
- Secondly, vacuum condensing,
- Also, camshaft oil cooling,
- Seawater central cooling,
- Moreover, oil cooling.
Chemical technology of heat exchanger:
Heat exchangers are commonly employed in chemical plants and refineries to heat incoming feed for distillation towers. Heat exchangers are often common in power facilities that employ steam-driven turbines to boil water into steam.
- Common to make EO/EG heat exchanger, VOC condenser.
- High pressure and high-temperature waste heat recovery system.
- The ethanol condensing system heats cool and condenses a variety of liquids.
- For instance, sulfuric acid, nitric acid, acrylic acid, fatty acids.
Industrial refrigeration system and heat exchange
- Firstly, evaporating or condensing NH3, R32, R407 refrigerant gas.
- Central water heating system, equipment to create hot water quickly using steam.
- Also, the building depressurizes uses a heat exchanger.
- Chiller Heat Recovery System.
- Finally, solar system heat exchanger, heat pump.
More benefits of heat exchanger
Heat exchangers have quite a few different uses and functions so the possibilities for this device are endless.
- F Paper technology: Waste heat recovery, paper coloring, etc.
- Heat exchangers are commonly common in food and beverage technology.
- Also, it can be common for pasteurization, sterilization, and preservation of food.
- Textile technology: Heat recovery in the washing and washing process.
- Also, common for cooling of ammonia, benzene, heat recovery of CO2 evaporation.
- Power industry:heat exchanger common to cool turbine oil using lake water, spring water.
- Moreover, theheat exchanger in the solar system.
Common types of heat exchanger
Beam tube heat exchanger
As one of the most widely common forms of heat exchanger in all industries, an estimated 60% of the world's heat exchangers today are tubular heat exchangers. The device consists of a bundle of tubes inside through which a liquid needs to be heated or cooled.
Beam tube heat exchangers are commonly common for applications requiring high working pressures and temperatures. There are a lot of heat exchanger mediums. They can be liquid, gas, or vapor.
The beam tube heat exchanger depends on several factors:
- Firstly, Using small pipes will reduce costs, compact equipment.
- Secondly, it will be difficult to clean and dirty.
- Also, pipe thickness is decided on heat transfer coefficient and abrasion.
- Moreover, pipe length, the distance between pipes, baffles
- The flow in a beam tube heat exchanger can be unidirectional, horizontal, or helical.
Plate heat exchanger
This is a type of device that uses metal plates to transfer heat between two liquids. This has a major advantage over a conventional heat exchanger. The device offers large heat exchanger efficiency and small size compared to the beam tube type heat exchanger.
Plate heat exchangers are mainly common for liquids operating at low pressures (below 30bar). Some special plate heat exchangers using welded joints can be common for high-pressure applications where the medium is gas or steam.
Some types of plate heat exchanger
- Firstly, plate heat exchangers use gaskets.
- Secondly, a semi-welded plate heat exchanger.
- Also, a sealed plate heat exchanger.
- Moreover, spiral heat exchanger.
- Finally, a flat plate heat exchanger
Benefits of heat exchanger
A heat exchanger is a device common to exchange heat between one or more heat carriers. Heat carriers may be separated by plates to prevent mixing or direct contact between the heat carriers.
These devices are commonly common in heating equipment, refrigerators, air conditioners, power plants, chemical plants, petrochemical plants, oil refineries, natural gas processing sites, and processing plants.
Why is it necessary to clean and disinfect the heat exchanger?
- Cleaning the heat exchanger and cooling system is very important.
- Because it affects the working performance of the machine and fuel consumption.
- If the heat exchanger is not handled and cleaned properly, it will lead to damage.
- Cleaning prevents loose equipment, prolongs processing time, and increases costs.
- Cleaning the cooling system and heat exchangerdirectly affects production machinery.
- If the cooling system works well, the production machinery can work continuously.
- Also, it ensures the production schedule.
- It is required to clean the cooling system to ensure the best working performance.
Determining the cause of equipment damage
After a long period of use, the plate heat exchanger may have to change the gasket. In certain cases of high temperature or chemical operation, the heat exchanger plate is most likely to be punctured, and we need to replace the heat exchanger plate with a new one.
In the factory most of the installation space is limited. For small size models, only a handheld device is needed to dismantle, but for large devices, sometimes the whole assembly must be removed to clean outside the factory.
Steps to clean the heat exchanger
Step 1: Remove the bolts that tighten the two heat exchanger frame plates. With large equipment, special equipment may be required. In this case, please contact our company for advice.
Step 2: Remove each heat exchanger plate and gently lift the plate’s rubber gasket to avoid breaking. For multi plate heat exchangers, a special plate order must be marked.
Step 3: Use chemicals, a high-pressure hose, or a brush to clean the heat exchanger plate.
Note when cleaning the heat exchanger
Tighten the bolts so that the heat exchanger pack length is less than or equal to the pack size before opening. In addition, the shape of the heat exchanger plate from both sides must be a honeycomb.
To cool condense ensures that the equipment does not leak and operates under pressure. It is necessary to check the pressure after cleaning the heat exchanger. With the plate heat exchangers, the test pressure is up to 30kg/cm2.
