Air Preheater For Boiler

Rotary Air preheater recovers the heat from the flue gas from the boiler going to the chimney and transfers the same to the combustion air to the boiler thus reducing the fuel consumption of the boiler. The efficiency of Rotary Air preheater is very high compared to the Tubular air preheater and also it occupies less space for the same heat recovery when compared with the Tubular Air preheater.

Air preheater rotor is divided into compartments in which the heating elements are packed. Heating elements in the Air preheater plays a major role for the heat transfer from the flue gas to the combustion air. The leakage from the flue gas to the combustion air is reduced by Radial, Axial and Circumferential seals thus reducing the fan loading.

1. The preheater tubes are not easily broken enamel surface, no crack, acid and alkali resistance, resistance to gas erosion, smooth and high, gas flow resistance, easy Fouling;

2. As the flue gas across tube, the flue gas side of the heat capacity of exile to strengthen, under the same heat transfer coefficient (enamel thickness ratio of thermal conductivity with very small, about 0.0002, the calculation is negligible), wall temperature vertical preheater than ordinary steel increased 10-30 Degree Celsius, the overall heat transfer coefficient of about 20.3-24.2W;

3. two horizontal enamel sealing tube box, the sealed tube box structure welded high strength, pipe damaged or the overall change can only block, and heat-packing seal, can only replace the damaged pipe tube, easy maintenance;

4. The preheater is mainly used for boiler preheater, the low temperature.

ASME standard boiler air preheater for industry.welding heat exchanger industrial boiler membrane water wall are membrane walls that are made of tubes welded together with or without a strip of metal in between. These walls form the enclosure of the coal combustion chamber. Water wall tubes are also referred to as the evaporator section; they contain water mostly in liquid form which gradually evaporates as it rises in the boiler. This is about the ASME standard boiler water wall for industry.

Counted on our professional knowledge, we cater to the needs from customers in renovation and modernization of their exsiting boilers. We have undertaken boiler air preheater and economzier replacement service for many years.

Low temperature corrosion and ash fouling exists for boiler air preheater, especially if burning coal with high sulfur content. The users have to replace the parts or stop the machine to clean the ash, which takes cost for users. We adopted the enamel coated air preheater, which has the function of anti-corrosion, wear resistance, anti-ash fouling, and long service life.

Air preheater, or boiler preheater, is an important boiler part. It can be divided into two kinds, Tubular type air preheater and Vertical type air preheater.
Air preheater pipe type, mainly using industrial furnaces or smoke waste heat boiler combustion air preheating furnace enter, such not only improves the thermal efficiency of the stove and reduce the environment pollution. Due to the gas - gas combustion on both sides of the heat exchanger, in order to strengthen small coefficient of heat transfer, usually installs the fin-root on both sides. Typical of the air preheater, its shape is commonly, main components for vascular cuboid, shell and partition.

An air preheater (APH) is a general term used to describe any device designed to heat air before another process (for example, combustion in a boiler) with the primary objective of increasing the thermal efficiency of the process. They may be used alone or to replace a recuperative heat system or to replace a steam coil.
Normal air preheater exist the problem of collection of ash,worn down,low temperature corrosion to effect the safe and economical operation for the boiler unit. So HTEG established the exclusive enamel research and development center to supply the complete solution and organize the scientific reserach personnel to tacle key problems and develop the new heat transfer parts-enameld tubes air preheater
The purpose of the boiler heat exchanger parts air preheater is to recover the heat from the boiler flue gas which increases the thermal efficiency of the boiler by reducing the useful heat lost in the flue gas. As a consequence, the flue gases are also conveyed to the flue gas stack (or chimney) at a lower temperature, allowing simplified design of the conveyance system and the flue gas stack. It also allows control over the temperature of gases leaving the stack (to meet emissions regulations, for example).
Advantages of our product GB3274 enameled tube air preheater

a).Improve and strengthen the combustion when crosses air preheater then enters the furnace, accelerates the fuel drying,the ignition and combustion process, ensures stable combustion in the furnace, and it is good for improving, strengthening the combustion effect.
b). strengthen heat transfer due to improved and intensified combustion furnance and the hot air temperature in the furnace is improved, the average temperature level in the furnace is improved, thereby strengthening the furnace radiation heat transfer.

Bronze Relief Valve

Rating : Max. Working Pressure 10.34 Bar Water or Air

Material : Bronze

Description : Right Angle, Enclosed Discharge

Ends : Inlet Screwed Male to BS:21, Outlet Screwed Female to BS:21

Specials : Suitable for Water, Air

Item Code : BM000016

Size : 15mm

Notes :

Available Valve Size : 15mm to 80mm

Bronze Relief Valve

Rating : Max. Working Pressure 10.34 Bar Water or Air

Material : Bronze

Description : Straight Type, Open Discharge

Ends : Screwed Male to BS:21

Specials : Suitable for Water, Air

Item Code : BM000014

Size : 15mm

Notes :

Available Valve Size : 15mm to 80mm