A boiler or steam generator is a device used to create steam by applying heat energy to water.
The circulating fluidized bed (CFB) boiler adopts the fluidized combustion;the main structure consists of two parts: the combustor (dense phase zone and dilute phase zone) and the circulation loop (the high temperature cyclone separator and return system).Nowadays,the circulating fluidized bed (CFB) boiler has well solved the basic problems on thermology,mechanics and materials science,becoming the advanced technology for energy utilization of non-flammable solid fuels such as coal gangue,oil shale,municipal refuse,sludge and other wastes.
A three-pass wetback design has a rear water wall, which separates the primary heating surface of the combustion chamber from the rear tube sheet.The water jacket eliminates the need for a refractory walland rear door swing space behind the boiler, as well as costly refractory maintenance.
The single drum boier refers to only one boiler drum in the boier. According to the placement of the boier drum, the single drum boier can be divided into vertical boier and horizontal boier. The common vertical single-drum boiers have WNS series boilers, and this boiers are widely used because of their high technical parameters and small footprint. The commonly used horizontal single drum boilers are DHL chain grate boilers. The fuel of this type of boier is mainly coal and biomass.
Double drum boiler can also be divided into vertical boier and horizontal boier. For the longitudinal double drum boier, they are SZL and SZS series boilers. In general, the structure is relative to the single drum and the horizontal boiler. This kind of boier is mainly suitable for industrial steam supply, central heating, peak load heat source and so on.
Chain grate boiler features: high in heat efficiency. Safe and reliable in running. Chain grate is a type of mechanical stoker for a boiler furnace, in which the grate consists of an endless chain that draws the solid fuel into the furnace as it rotates.
Bagasse fired boilers bum bagasse to produce heat fcr central heating and hot water. They are extremely good at doing this, boasting efficiency levels of over 90% which is comparable withmodem oil and gas fired boilers. Easy to operate and maintain, bagasse boilers are increasing in popularity in the world as they offer users currently on heating oil, significant savings on fuel costs, and a reduction in Carbon Dioxide emissions.
The ever-rising cost of fossil fuel has compelled the industries to research for alternative fuels, and biomass as the clean and low cost fuel comes into people’s eyes. The rice husk fired steam boiler in particular is considered a suitable candidate at first, while as the technology developing and taking advantage of the lower cost of rice husks, rice mills prefer to use rice husks as fuel in boilers for generating steam.
A steam generator is a form of low water-content boiler, similar to a flash steam boiler. The usual construction is as a spiral coil of water-tube, arranged as a single, or monotube, coil.
The flue gases or smoke travel inside the tubes at high velocities thereby transferring convective heat to water. Generally, tube passes are made in a boiler in order to achieve high heat transfer rates.
Wide range of uses in providing potable hot water to schools, apartments, institutions, hospitals, food processors, high tech facilities, and any facility requiring domestic hot water.
The purpose of a boiler in a heat transfer fluid system is obvious: it must provide the energy demanded by the consuming appliances at the temperature required by the production system.
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