Principle And Structure of Steam Boiler

As is known to all, industrial boilers have many forms, steam boiler for sale in many models, tonnage is different. Today, let me talk about an ordinary fast-installed 4ton steam boiler. The principle of the steam boiler is that water is heated into steam in the drum and fire emits heat in the furnace.

Steam boilers are mainly machines that produce steam. Nowadays, more and more people use it, but many people don’t know much about its structure and how it works. It is to use coal, oil, natural gas and other water tube steam boiler capacity and pressure are less limited, there is a lot of want to space, and easy to arrange, the form of the steam boiler is diverse. Water is heated in a pot to become steam, and the heat from a fire in the furnace is the principle of a steam boiler.

 

Steam boiller for sale

 

Say the boiler first “pot”. This boiler is a drum-type boiler with a water-cooled wall, and two return fireworks are arranged in the left and right sections of the drum, which are folded back in the front smoke box at the front of the drum. Between the boiler tube and the lower connecting box, there is a downcomer and a water-cooled tube to form the frame of the combustion chamber. There is a steam-water separator in the upper part of the drum to reduce the water brought out by the steam. The heating surface of the pot body is the lower part of the pot barrel, water-cooled tube and pyrotechnic tube.

Structural Features of Steam Boiler For Sale

This series of boiler body welding: the main welding seam adopts the advanced submerged arc automatic welding technology to ensure the welding quality.
The body adopts the structure of horizontal internal combustion with full wet back and three return passes.
The sealing of the front and rear smoke boxes is made of high temperature resistant asbestos-graphite material, which ensures the steam boiler will not leak when running under micro-positive pressure.
Threaded pipe: in the second return convection heating surface of the steam boilers, we use threaded pipe to facilitate efficient heat transfer. Strengthen heat transfer, make steam boiler heat efficiency is high.

The combustion part is composed of a chain grate and a driving device, plus a combustion chamber formed by the pot body frame on the grate frame. Refractory materials are protected around. Coal is fired from the coal hopper, and coal gates control the thickness of the coal seam while sealing the front air. The lower part of the combustion chamber is where the blast enters. This kind of boiler has a large resistance and requires forced blast.

 

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The cinder-burning coal slag is discharged through the “eagle mouth” at the rear of the grate, and is sent out of the furnace by the slag discharger. The flue gas travels from the back of the boiler through the one-pass smoke pipe of the boiler tube, returns to the rear from the two-pass smoke pipe, enters the dust collector to separate the ash. And then is discharged from the chimney through the induced draft fan. The induced draft fan not only exhausts the flue gas, but is also necessary for the negative pressure operation of the boiler. Steam boilers are power containers, and safety devices are necessary.

Steam boiler for sale necessary water level gauge, pressure gauge, safety valve, thermometer, as well as electric water supply pump that can make up water under pressure. And steam pump that can also be used when power is off. This series of boilers water must be softened, as well as water treatment equipment.

 

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