COAL BOILER

Classification of coal quality are generally divided into two, namely the division in this scientifically based pembatubaraaan level, and the division based on the intended use.Based on sequence pembatubaraannya, coal is divided into a young coal (brown coal or lignite), sub-bituminous, bituminous, and anthracite. While based on the intended use, divided into coal steam coal (steam coal), coal coke (coking coal or metallurgical coal), and anthracite.Steam coal is coal which use the most extensive scale. Based on the method, be using steam coal consist of direct utilization of coal that meets certain specifications used immediately after going through the process of crushing (crushing...

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CHEMICAL RECOVERY BOILER

HEART OF A CHEMICAL PULP MILL The recovery boiler plays a central role in the chemical cycle of a modern pulp mill. The boiler produces energy for the mill. The spent liquor from the digesting plant goes first to the evaporation plant where the dry solids content of the liquor is increased. Then the evaporated liquor comes to the recovery boiler plant. Fly ash from electrostatic precipitators is mixed into the black liquor.  After additional concentration of the black liquor in the evaporation plant  the liquor is burned in the combustion chamber of the boiler. Feed water is pumped first to the economizers where it is preheated by flue gas. The water then enters the water circulation system of the boiler. During combustion...

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NCG (NON CONDENSIBLE GASES)

NCG Burning in Recovery Boilers This time i will explain about Non Condensible Gases or NCG in Power plant boiler.after yesterday I was talking about "How does a power plant boiler work?" NCG = Non Condensible Gases NCG are: the non-condensable gas, this gas has a very distinctive odor karesteristik. This odor is caused by a mixture of sulfur into TRS (Total Reduced Sulfur) Categories A.Composition and NCG NCG content include: Hydrogen sulfide (H2S) Mercaptan (CH3SH) Dimethyl sulfide (CH3) 2S Dimethyl disulfide (CH3) 2S2 Ethanol (C2H5OH) NCG gases are divided into two categories, namely: LVHC = Low Volume High Cocentration High Volume Low HVLC = Cocentration B. Sources of NCG NCG is the...

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WHAT IS THE BLACK LIQUOR

Concentrated black liquor contains organic dissolved wood residue in addition to sodium sulfate from the cooking chemicals added at the digester. Combustion of the organic portion of chemicals produces heat. In the recovery boiler heat is used to produce high pressure steam, which is used to generate electricity in a turbine. The turbine exhaust, low pressure steam is used for process heating. Combustion of black liquor in the recovery boiler furnace needs to be controlled carefully. High concentration of sulfur requires optimum process conditions to avoid production of sulfur dioxide and reduced sulfur gas emissions. In addition to environmentally clean combustion, reduction of inorganic...

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MECHANISMS OF STEAM SOOT BLOWER EROSION

There are many mechanisms that can cause steam soot blower erosion of boiler tubes at various heat transfer sections. Knowing the way these mechanisms contribute to erosion will help to prevent loss of availability of boiler. Soot blowers are provided in boilers at various locations like water-walls, superheaters, reheaters, economizers and air pre-heaters. Steam soot blowers have specific advantage and disadvantages over other types. The advantages being mainly their low capital cost, operating cost and the effectiveness of cleaning in areas like furnace, superheaters and reheaters. The major disadvantages are they need a higher level of maintenance; effectiveness is low in oil firing...

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FURNACE CAMERA

This day i will taking about Furnace Camera.As the current technological developments in power plant technology especially the use of recovery boiler is constantly innovating in order to complement the existing deficiencies in the means of production to facilitate the operation of the recovery boiler. Currently the power plant that uses a recovery boiler there is a lack of technology to the unavailability of a device to control the conditions inside the boiler (furnace). So far the recovery boiler operator can only monitor the condition of the inside of the furnace manually just by looking at the field by controlling the air of room pannel (dcs). but that's not enough data taken with...

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