heat exchanger - Industrial purification heat recovery

how does a heat exchanger work in a boiler

A heat exchanger in a boiler transfers heat from the combustion gases to the water circulating in the system. Here's how it works step by step:

Combustion occurs: The boiler burns a fuel source (like natural gas, oil, or electricity), creating hot combustion gases.
Heat transfer to the heat exchanger: These hot gases flow through a heat exchanger—typically a coiled or finned metal tube or series of plates made of steel, copper, or aluminum.
Water circulation: Cold water from the central heating system is pumped through the heat exchanger.
Heat absorption: As the hot gases pass over the surfaces of the heat exchanger, heat is conducted through the metal into the water inside.
Hot water delivery: The now-heated water is circulated through radiators or to hot water taps, depending on the boiler type (combi or system boiler).
Gas expulsion: The cooled combustion gases are vented out through a flue.

In condensing boilers, there's an extra stage:

After the initial heat transfer, the remaining heat in the exhaust gases is used to preheat incoming cold water, extracting even more energy and improving efficiency. This process often creates condensate (water), which is drained from the boiler.

Does a heat exchanger remove humidity?

A standard air-to-air heat exchanger primarily transfers heat between two airstreams and does not directly remove humidity. The airstreams remain separate, so moisture (humidity) in one airstream typically stays within that airstream. However, there are nuances depending on the type of heat exchanger:

Sensible Heat Exchangers: These (e.g., most plate or heat pipe exchangers) only transfer heat, not moisture. Humidity levels in the incoming and outgoing air remain unchanged, though relative humidity may shift slightly due to temperature changes (warmer air can hold more moisture, so heating incoming air may lower its relative humidity).
Enthalpy (Total Energy) Exchangers: Some advanced designs, like rotary wheel or certain membrane-based exchangers, can transfer both heat and moisture. These are called hygroscopic or enthalpy recovery ventilators (ERVs). The core material or wheel absorbs moisture from the humid airstream (e.g., warm, humid indoor air) and transfers it to the drier airstream (e.g., cold, dry outdoor air), effectively managing humidity levels to some extent.
Condensation Effects: In certain conditions, if the heat exchanger cools humid air below its dew point, condensation may occur on the exchanger’s surfaces, removing some moisture from that airstream. This is incidental, not a primary function, and requires a drainage system.

So, a standard heat exchanger doesn’t remove humidity unless it’s an enthalpy-type ERV designed for moisture transfer or if condensation occurs. If humidity control is a goal, you’d need an ERV or a separate dehumidification system.

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Application of Air-to-Air Heat Recovery Exchanger in Livestock Ventilation

The Air-to-Air Heat Recovery Exchanger plays a vital role in the livestock ventilation industry by enhancing energy efficiency and maintaining optimal indoor conditions. Designed to recover waste heat from exhaust air, this exchanger transfers thermal energy from the warm, stale air expelled from livestock facilities to the incoming fresh, cooler air without mixing the two streams. In poultry houses, pig barns, and other breeding environments, where consistent temperature control and air quality are critical, it reduces heating costs in winter by pre-warming fresh air and mitigates heat stress in summer through effective thermal regulation. Typically constructed with corrosion-resistant materials like aluminum or stainless steel, it withstands the humid and ammonia-rich conditions common in livestock settings. By integrating into ventilation systems, the exchanger not only lowers energy consumption but also supports sustainable farming practices, ensuring animal welfare and operational efficiency. Its application is particularly valuable in large-scale breeding operations aiming to balance cost-effectiveness with environmental responsibility.

Plate heat exchanger for drying linen in hotels and laundry industry

Application principle:
During the washing and drying process of linen, steam or hot water enters one side of the plate heat exchanger as a high-temperature fluid, while the air to be heated (for drying) enters the other side as a low-temperature fluid. Through a plate heat exchanger, the high-temperature fluid transfers heat to the low-temperature fluid, causing the air temperature to rise and achieving the purpose of preheating.
Plate heat exchangers have good thermal conductivity and can effectively transfer the heat of steam to linen, improving thermal efficiency. This means that the drying process of linen can be completed faster or energy consumption can be reduced with the same energy consumption.
Structural design: The plate heat exchanger is composed of multiple thin metal plates that form sealed channels between them. Metal plates are usually made of materials with good thermal conductivity, such as aluminum foil, copper foil, or stainless steel foil.
Energy saving and environmental protection: By recycling and reusing heat energy, plate heat exchangers can reduce steam consumption, lower energy consumption, and protect the environment. This is particularly important for places such as hotels, guesthouses, hospitals, and the laundry industry that require a large amount of washing and drying of linen.
The application principle of the plate heat exchange core of the linen washing and drying heat exchanger is based on the basic principles of heat conduction and convection, and efficient heat exchange is achieved through reasonable structural design and material selection.

Heat exchanger for sludge drying

Air heat exchangers play a crucial role in the low-temperature drying process of sludge. Based on the thermal conductivity and corrosion resistance of epoxy aluminum foil material, efficient low-temperature drying of sludge is achieved by optimizing the heat exchange process.

working principle:
It uses a heat pump system to cool and dehumidify the humid air from the drying chamber through an evaporator, while heating and reheating it through a condenser to produce dry hot air that is sent into the drying chamber.
Application effect:
Epoxy aluminum foil, as a material for heat exchangers, has efficient thermal conductivity that helps to quickly transfer heat and improve heat exchange efficiency. Meanwhile, due to its corrosion resistance, it can effectively resist the erosion of corrosive gases and substances that may be generated during the sludge drying process, extending the service life of the equipment.
The application principle of the low-temperature sludge dryer heat exchanger is mainly based on the thermal conductivity and corrosion resistance of epoxy aluminum foil material. By optimizing the heat exchange process, efficient low-temperature sludge drying can be achieved.

Plate heat exchanger for drying beef and pork

working principle:
During the drying process of beef and pork, the high-temperature moisture (exhaust gas) generated is transferred to the fresh air entering the system through the heat exchange core. In this way, fresh air is preheated before entering the drying area, thereby reducing the energy consumption required to heat the fresh air.
Structural features:
High quality hydrophilic aluminum foil is commonly used as a heat transfer conductor, with good heat transfer efficiency and a long service life (generally up to 8-10 years)
The channels for fresh air and exhaust gases are arranged in a cross pattern, separated by aluminum foil to ensure the cleanliness of the fresh air and prevent the spread of any odors and moisture.
All connections are sealed with sealant and treated with biting edge flowing adhesive to ensure the airtightness of the heat exchanger.
Performance advantages:
The heat exchange efficiency can reach up to 90%, which can significantly reduce energy consumption.
Compact structure, small volume, suitable for installation and use in various occasions.
Easy to maintain, easy to clean, can be directly cleaned with tap water or neutral detergent.

Total heat recovery ventilation technology for home decoration fresh air system

The fresh air system is a common air treatment equipment in modern homes and commercial buildings, which can provide a continuous supply of fresh air and discharge indoor polluted air. In the fresh air system, heat recovery efficiency is a key indicator, and high heat recovery efficiency means that the system can more effectively recover energy during the ventilation process, thereby reducing energy consumption. Total heat exchange technology can recover heat and humidity while ventilating, reducing energy loss caused by ventilation and achieving energy conservation and consumption reduction.

Total heat recovery ventilation technology
Total heat recovery refers to the process in which a fresh air system, while introducing fresh outdoor air, recovers the heat and humidity from the discharged indoor air through a heat exchanger for heating or cooling the incoming fresh air. A total heat exchanger is an energy-saving device in a fresh air system that can exchange heat and humidity without mixing fresh air and exhaust air.
The application of total heat exchange technology not only reduces reliance on air conditioning and heating equipment, but also lowers overall energy consumption, in line with the concept of sustainable development. Choosing a suitable fresh air system can not only improve living comfort, but also achieve the goals of energy conservation, emission reduction, and carbon neutrality.

Rotations-/Rad-Energierückgewinnungswärmetauscher

Es gibt zwei Arten rotierender Energierückgewinnungswärmetauscher: den Vollwärmetyp und den sensiblen Wärmetyp. Als Wärmespeicherkern strömt die Frischluft durch einen Halbkreis des Rades, während die Abluft durch einen anderen Halbkreis des Rades strömt Auf diese Weise strömen abwechselnd Frischluft und Abluft durch das Rad.
Im Winter absorbiert der regenerative Radkörper Wärme aus dem Abgas (nass), wenn er auf die Frischluftseite bewegt wird, würde der regenerative Kernkörper aufgrund der schlechten Temperatur (nass) eine Menge Wärme (nass) abgeben, wenn er auf die Abgasseite gelangt und absorbieren weiterhin die Wärme in der Abgasmenge (nass). Die Energierückgewinnung wird durch einen solchen wiederholten Zyklus erreicht, und das Funktionsprinzip ist in der Abbildung dargestellt. Während des Sommerkühlbetriebs ist der Prozess umgekehrt.
Wenn das volle Wärmerad läuft, werden Wassermoleküle in der Luft von der Molekularsiebbeschichtung auf der Oberfläche der Wabe absorbiert und bei der Übertragung auf die andere Seite aufgrund des Druckunterschieds zwischen den Wassermolekülen freigesetzt.

Der All-Heat-Läufer nutzt die Frischluft zum Austausch von sensibler und latenter Wärme, um Energie zu sparen und eine gute Belüftung im Raum aufrechtzuerhalten. Die Frischluft kann im Sommer vorgekühlt und entfeuchtet und im Winter vorgewärmt und befeuchtet werden.

Luft-Luft-Gesamtplattenwärmetauscher der BQC-Serie

Strukturelle Merkmale von
·Der Vollwärmetauscher vom Typ BQC verfügt über eine Kreuz-Gegenstrom-Struktur, bei der die Luft teilweise quer und teilweise umgekehrt strömt. Die neue Abluft wird vollständig getrennt, um jegliche Geruchs- und Feuchtigkeitsübertragung zu vermeiden.
·Der All-Wärmetauscher VERWENDET einen ABS-Kunststoffrahmen, der schön ist, eine hohe Festigkeit aufweist, nicht leicht beschädigt werden kann, eine lange Lebensdauer hat, umweltfreundlich ist und über eine gute Abdichtung verfügt, die die strukturelle Festigkeit und Dichtheit der Wärme gewährleistet Wärmetauscher und reduziert die Vermischung neuer Abluft;
· Das vollständige Wärmeaustauschpapier besteht aus importiertem, nicht porösem Folienpapier (ER-Papier) und wird in einem speziellen Verfahren verarbeitet. Es zeichnet sich durch gute Luftdichtheit, hohe Wärmeübertragungseffizienz, Reißfestigkeit, Alterungsbeständigkeit, Korrosionsbeständigkeit und antibakterielle Eigenschaften aus.
·Alle Anschlüsse des Wärmetauscherchips sind mit Dichtmittel abgedichtet, um die Luftdichtheit des Wärmetauschers zu gewährleisten;
· Es kann mit einem Staubsauger und Druckluft gereinigt werden und ist leicht zu verwenden und zu warten.
·Wärmetauscher verschiedener Spezifikationen und Größen können je nach Benutzeranforderungen entwickelt werden.

Anwendung und Anwendungsmodus
·AC-Belüftungssystem
·Raumlüftungssystem
·Industrielles Lüftungssystem
·Wärmepumpen-Trocknungssystem
·Indirektes Verdunstungskühlsystem
·Großangelegtes wissenschaftliches Zuchtsystem
· Frischluftsystem der Klimaanlage reinigen
· Indirektes Luft-Luft-Kühlsystem für Windgeneratoren
·Wärmerückgewinnung im Winter
·Kälteerholung im Sommer

Wärmerückgewinnung aus der industriellen Reinigung

Schlagwort-Archiv Wärmetauscher