Moving bed heat exchanger

Moving bed heat exchanger

Moving bed heat exchangers (also moving bed coolers) are stationary heat exchangers for bulk materials for continuous processes in chemical engineering.



Moving bed heat exchangers essentially exist of a huge number of square tubes which are arranged in heat exchanger packages one above the other. The ends of the tubes are closed with end plates. Behind the plates are reversing chambers for the cooling or heating medium. The sides of the external tubes are equipped with steel plate strips which hold the product in the shaft. To protect the environments or the product quality, doors that close the side walls can be fitted. Above and under the heat exchanger are feed respectively discharge hoppers. Different conveyor facilities for bulk materials, as for example conveying screws, bucket conveyors or similar are downstream systems.


The cooling or warming of the bulk materials in the Moving bed Cooler happens indirectly; via water, thermal oil or steam. The heating or cooling medium flows through the square tubes. Medium and product flow in cross countercurrent to each other. The coolers work according to the Moving Bed Principle. I.e. the product forms a product column which flows continuously down between the cooling pipes. A discharge bottom with variable openings regulates dwell time and flow rate.


Moving bed heat exchangers can be used for cooling or warming of all free-flowing bulk materials which correspond to the requirements of the apparatus, concerning grain size and angle of repose. The heat exchangers often can be found after rotary kilns and dryers to cool e.g. mineral (quartz sand, Ilmentit etc.) or chemical products (fertilizer, soda etc.). The entry temperatures of the products can reach up to 1200 °C.

Technical specifications

Moving bed heat exchangers have a relatively compact construction. Because of the working principle they need only a small base. However, depending on their application they can build relatively high. Because of having only few moved parts they have low electrical requirements and are low-maintenance. Problems with noise or dust contamination of the environments do not occur.

See also

External links

Wikimedia Foundation. 2010.

См. также в других словарях:

  • Heat exchanger — An interchangeable plate heat exchanger Tubular heat exchan …   Wikipedia

  • Heat transfer — is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase change …   Wikipedia

  • Pebble bed reactor — Sketch of a pebble bed reactor in Italian …   Wikipedia

  • Conveyor system — Conveyor redirects here. For other uses, see Conveyor (disambiguation). This article is about conveyor systems. For information on conveyor belts, see conveyor belts. For information on overhead conveyors, see overhead conveyors. An overhead… …   Wikipedia

  • Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …   Wikipedia

  • Countercurrent exchange — Counter heat current exchange: Note the gradually declining differential and that the once hot and cold streams exit at the reversed temperature difference; the hotter entering stream becomes the exiting cooler stream and vice versa.… …   Wikipedia

  • Nuclear reactor — Core of CROCUS, a small nuclear reactor used for research at the EPFL in Switzerland This article is a subarticle of Nuclear power. A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Most commonly they are… …   Wikipedia

  • Nuclear reactor technology — This article is a subarticle of Nuclear power .A nuclear reactor is a device in which nuclear chain reactions are initiated, controlled, and sustained at a steady rate, as opposed to a nuclear bomb, in which the chain reaction occurs in a… …   Wikipedia

  • Ocean thermal energy conversion — Temperature differences between the surface and 1000m depth in the oceans Ocean Thermal Energy Conversion (OTEC) uses the difference between cooler deep and warmer shallow or surface ocean waters to run a heat engine and produce useful work,… …   Wikipedia

  • Nuclear meltdown — Three of the reactors at Fukushima I overheated, causing core meltdowns. This was compounded by hydrogen gas explosions and the venting of contaminated steam which released large amounts of radioactive material into the air.[1] …   Wikipedia

Поделиться ссылкой на выделенное

Прямая ссылка:
Нажмите правой клавишей мыши и выберите «Копировать ссылку»