Industry information - Page 9 - Industrial purification heat recovery

Working principle of plate air-to-air heat exchanger

Plate air-to-air heat exchanger is a commonly used heat exchange equipment, and its working principle is as follows:

The plate air-to-air heat exchanger is composed of a series of parallel metal plates, and a series of channels are formed between the plates. The heat medium flows in these channels. When the heat medium flows in the plate air-to-air heat exchanger, the heat medium transfers heat to the plate, and then the plate transfers heat to the other side of the heat medium, thereby achieving heat transfer and heat exchange.

The working principle of the plate air-to-air heat exchanger can be divided into two ways: direct heat transfer and indirect heat transfer.

Direct heat transfer: Direct heat transfer refers to the heat medium flowing directly through the plate, transferring heat to the other side of the heat medium. This method is suitable for situations where the temperature difference between the two sides of the heat medium is small.

Indirect heat transfer: Indirect heat transfer refers to the heat medium transferring heat to the other side of the heat medium through the plate. This method is suitable for situations where the temperature difference between the two sides of the heat medium is large.

In the plate air-to-air heat exchanger, the flow of the heat medium has two ways: one-way flow and two-way flow. One-way flow means that the heat medium flows in only one direction, while two-way flow means that the heat medium can flow in two directions. Plate air-to-air heat exchangers with two-way flow have higher heat exchange efficiency, but they are also more complex and expensive.

In summary, the plate air-to-air heat exchanger achieves heat transfer and heat exchange between heat media through the channels between plates. Its working principle can be divided into direct heat transfer and indirect heat transfer, and the flow of the heat medium has one-way flow and two-way flow.

The economic value of heat exchangers is mainly reflected in the following aspects

The economic value of heat exchangers is mainly reflected in the following aspects:

Energy saving and consumption reduction: Heat exchangers can convert waste heat or excess heat into usable heat energy, thereby reducing energy consumption and energy costs.

Improving production efficiency: By recovering waste heat or excess heat, heat exchangers can improve the thermal efficiency of the production process, thereby improving production efficiency and product quality.

Extending equipment life: Heat exchangers can reduce the thermal stress of equipment, reduce the degree of thermal fatigue of equipment, and thus extend the service life of equipment.

Reducing environmental pollution: By recovering waste heat or excess heat, heat exchangers can reduce environmental pollution and reduce the environmental protection costs of enterprises.

Improving enterprise competitiveness: With the advantages of energy saving and consumption reduction, improving production efficiency, extending equipment life, and reducing environmental pollution, heat exchangers can improve the competitiveness of enterprises and enhance their sustainable development capabilities.

Therefore, for enterprises that require a large amount of heat energy, installing heat exchangers is very economically valuable.

Air filtration box and air heat recovery box

An air filtration box and an air heat recovery box are two common air handling devices used to improve indoor air quality and enhance energy efficiency.

Air Filtration Box: An air filtration box is a device used to filter and purify indoor air. It typically includes a filtration system that effectively removes particles, dust, pollen, bacteria, viruses, and other pollutants from the air. The air filtration box is usually installed in the ventilation system, where the air passes through the filter before being distributed into the indoor space, providing clean and healthy indoor air.

Air Heat Recovery Box: An air heat recovery box is a device used to recover and utilize the heat energy from indoor air. The heat energy in the indoor air is typically expelled outdoors through exhaust. The air heat recovery box employs a heat exchanger to transfer the expelled indoor air's heat to fresh outside air. This allows for the recovery of heat energy while expelling waste air, thereby improving the efficiency of air heating and reducing energy consumption.

Air filtration boxes and air heat recovery boxes are often used in combination to achieve comprehensive air treatment. The air filtration box ensures clean and purified indoor air, while the air heat recovery box provides energy recovery and energy-saving benefits. These devices play a vital role in providing comfortable and healthy indoor environments, particularly in terms of efficient energy utilization and environmental preservation.

Several types of air waste heat recovery heat exchangers

There are several types of air waste heat recovery heat exchangers:

Plate heat exchanger: This type of heat exchanger uses a series of metal plates to transfer heat between two fluids. The plates are arranged in a way that allows the fluids to flow in opposite directions, maximizing heat transfer efficiency.

Shell and tube heat exchanger: This type of heat exchanger consists of a series of tubes inside a larger shell. One fluid flows through the tubes while the other flows around the tubes in the shell. Heat is transferred between the two fluids through the tube walls.

Heat pipe heat exchanger: This type of heat exchanger uses a sealed pipe filled with a working fluid that evaporates and condenses to transfer heat between two fluids. The working fluid absorbs heat from one fluid, evaporates, and then condenses to release the heat to the other fluid.

Run-around coil heat exchanger: This type of heat exchanger uses two separate coils, one in each fluid stream, connected by a pump and a heat exchanger. Heat is transferred between the two fluids as they flow through their respective coils and the heat exchanger.

Rotary heat exchanger: This type of heat exchanger uses a rotating wheel with a heat-absorbing material to transfer heat between two fluids. One fluid flows through the wheel while the other flows around the wheel. Heat is transferred between the two fluids as the wheel rotates.

What are the application scenarios of air waste heat recovery heat exchangers

The application scenarios of air waste heat recovery heat exchangers are quite extensive, mainly including the following aspects:

Industrial production: In the process of industrial production, many devices generate a large amount of waste heat, such as dryers, heat treatment furnaces, melting furnaces, etc. This waste heat can be recovered and utilized through air waste heat recovery heat exchangers to reduce energy consumption and improve production efficiency.

Commercial buildings: The air conditioning systems, ventilation systems, etc. in commercial buildings also generate a large amount of waste heat. By using air waste heat recovery heat exchangers for recovery and utilization, energy consumption can be reduced and operating costs can be lowered.

Medical and health care: Operating rooms, disinfection rooms, and other facilities in hospitals need to maintain a certain temperature and humidity. The waste heat generated by these devices can be recovered and utilized through air waste heat recovery heat exchangers to improve energy utilization efficiency.

Agriculture and animal husbandry: In the process of livestock and poultry breeding, a certain temperature and humidity need to be maintained. The waste heat generated by these devices can be recovered and utilized through air waste heat recovery heat exchangers to improve energy utilization efficiency and reduce breeding costs.

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Factory customized production of fresh air filter

Kunshan Aifeige Purification Equipment is a company engaged in the manufacturing, sales, and research and development of air filtration products. Its main products include: primary efficiency filters, medium efficiency filters, high-efficiency filters, oil mist filters, suspension blower filters, FFu filters, and other air filtration products.
The company is located in Kunshan High tech Zone, and currently has efficient production lines, efficiency, wind speed, and other complete sets of testing instruments. The entire production process is conducted in a Class 10000 clean room. The junior and junior high efficiency filters are all pipelined. Multiple products, providing one-stop service for customers' entire factory filter screen configuration. At the same time, we undertake OEM ODM and import and export trade business.

Heat recovery of ventilation and ventilation in piggery

Ventilation is an important means to control the environment of piggery. Ventilation in different seasons and different areas need different schemes due to different outdoor temperatures. One is to increase the air flow to make pigs feel comfortable under high temperatures, so as to mitigate the adverse effects of high temperatures on pigs; Under the condition of suitable outdoor temperature, it is sufficient to introduce an appropriate amount of fresh air to discharge the dirty air and moisture in the pig house, so as to improve the air environment of the pig house and reduce the number of microorganisms in the air in the pig house. The third is the outdoor cold season, so it is necessary to increase the temperature of the introduced fresh air to prevent the cold air from blowing directly into the pig house. The first is to conduct heat recovery of the discharged air in the pig house, The heat of exhaust air and fresh air in the house is exchanged by air-air plate heat exchanger or runner heat exchanger. In addition, in extreme cold conditions, it is necessary to use heat coils to properly heat the fresh air.

Wind Generator Air to Air Indirect Cooling System

Wind power system background

Wind power is a kind of clean energy, with the characteristics of renewable, pollution-free, large energy and broad prospects. The development of clean energy is the strategic choice of all countries in the world.

However, if the air is directly fed into the generator cabin for cooling, the dust and corrosive gas will be brought into the cabin (Especially wind turbines installed offshore).

Indirect cooling system solution

The indirect cooling method can make the air from inside and outside perform indirect heat exchange to achieve the effect of cooling the wind generator cabin without bringing dust and corrosive gases from outside into the cabin.

The main component of the indirect cooling system is the BXB plate heat exchanger. In the BXB plate heat exchanger, two channels are separated by aluminum foil. The air in the cabin is closed circulation, and the outside air is open circulation. The two airs are doing heat exchange. The air in the cabin transfers heat to the outside air, which reduces the temperature in the wind generator. In addition, the air inside and outside the cabin will not be mixed due to the isolation of aluminum foil, which prevents dust and corrosive gases outside the cabin from being brought into the cabin.

Air plate heat exchanger for air waste heat recovery

The air-gas plate heat exchanger for air waste heat recovery is made of seawater corrosion-resistant hydrophilic aluminum plate, epoxy resin aluminum plate or stainless steel foil. The heat transfer surface of the heat exchanger is subject to enhanced heat transfer stamping forming treatment. The heat exchanger adopts enhanced stamping undercut technology, which has higher strength, better sealing performance and less than 1% air leakage rate; The air passage is supported by a conductor convex cylinder, and the capacity to withstand the new exhaust pressure difference is 2500 Pa; The normal use temperature of ordinary aluminum foil is not higher than 100 ℃, the temperature resistance of special sealing material can reach 200 ℃, and the temperature resistance of stainless steel material can reach 350 ℃; It can be cleaned directly with tap water or neutral detergent, which is convenient to use and easy to maintain; Provide different plate spacing (2.0mm-10.0mm) and any combination length.
The products are widely used in commercial central air conditioners, industrial purification air conditioners, healthy and green residences, data center heat exchange, 5G base stations, medical purification, wind power heat exchange, large-scale breeding energy-saving ventilation, new energy vehicles, printing machines, coating machines, sizing machines, charging pile heat exchange, printing, food, tobacco, sludge drying and other fields,

Industrial purification heat recovery

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