Product Description

First in our country, we have successfully developed commercial sized GP Biomass Gasification Plant for generation of electrical power as well as thermal energy from agro waste.

In GP system, solid biomass, a carbonaceous fuel is burnt under controlled air and water to produce a combustible (carbon–monoxide based) gas, generally known as producer gas. This gas is having calorific value of ***0–***0 Kcal/nM3 which is being utilized for generation of electrical power and/or thermal energy. However, before this gas is used, it is important to clean and cool it as it contains tar and other impurities.
 
GP Biomass Gasifier Plant is highly suitable as a decentralized power station– both for captive use in the industries as well as for rural electrification, where transmission of power through grid line is very expensive and growth of electrical load is minimal.
    
For generation of electrical power with producer gas, two types of engines can be used :-
Dual Fuel Engine: A dual fuel engine is basically a diesel engine with conversion kit to run the engine with diesel and any suitable gas having certain calorific value including producer gas. This works on the diesel cycle. Producer gas is added to the air, which is introduced to the engine before introducing it into the turbo-charger. This mixture of air and gas is compressed in the cylinder just as air is compressed in normal CI engine. After compression, the diesel is injected through a conventional fuel system. This diesel oil ignites first as pilot fuel and the heat released by its combustion leads to the combustion of the gas air mixture. In the process, consumption of diesel can be reduced to the extent of *5%**5%. Existing engine may also be retrofitted for dual-fuel operation.

Spark Ignition Engine : The producer gas is the sole fuel in the  Spark Ignition (SI) engine. A gas carburetor or mixer is used to prepare the air-gas mixture. The mixture is sucked into the engine during the suction stroke, compressed and then ignited by a spark from a spark plug in the cylinder head.

THERMAL ENERGY: 

Since producer gas is combustible in nature, the same can be fired with the help of a suitably designed burner. This is how the boiler, furnace, oven etc. can be gas fired to replace oil, coal or any other costly fuel. In this case, there will be no ash/fly ash or particulate in the exhaust gas.

Again, temperature up to ****0C can be achieved by burning the above gas. Hence, process heat for industrial applications namely, heating of water, air, fluid etc. is obtained from producer gas at a cheaper cost.


PROCESS TECHNOLOGY

The Gasification process technology is based on production of a highly combustible gas by controlled reactions of Biomass viz. rice husk, wood, palm nut shell etc. with air and water vapour.

In the Gasifier, the solid biomass fuel having moisture content not exceeding *0% and *5mm size is fed from the top, while the air and steam is fed from the bottom, and moves upward against the downward movement of the biomass fuel, and this process of gas generation is called the Updraft principle.

A number of chain chemical reactions take place in the gas generator from the bottom to the top, a proper mixture of air & water vapour pass through channel free compact fuel bed ensuring the following reactions to take place.

Oxidation Zone
C + O2    =    CO2 + Heat

Primary Reduction Zone
C + CO2    =    2CO ~ Heat
C + H2O    =    CO + H2 ~ Heat
C + 2H2O    =    CO2 + 2H2 ~ Heat

Secondary Reduction Zone
C + CO2    =    2CO ~ Heat
CO + H2O    =    CO2 + H2 ~ Heat

While the plant is under normal operation, following zones are believed to exist in the gasifier, as shown in the cross sectional view below:

Ash Zone : A flow of heat takes place from hot ash to the air and water vapour entering the system and thus the hot process air enters the oxidation zone and the cooled ash leaves the system at the bottom to the water seal, generally maintained at about **0 mm wg. 

Oxidation Zone : It is a thin zone having the highest temperature (***0C–****0C) in the Gasifier due to the exothermic reaction.

Primary Reduction Zone :  The heat released by the oxidation zone below is cooled down by the endothermic reactions in this zone with the formation of CO, H2 and CO2 by the interaction of C present in the fuel with O2 and H2O present in the process air.

Secondary Reduction Zone : It reduces further the temperature of the gas coming out of the zone below  due to the endothermic reactions with the production of CO by the interaction of C with CO2 and simultaneous water gas reaction.

Distillation Zone : The heat of the up moving gas from the secondary reduction zone helps the distillation of the volatile matters present in the fuel with the evolution of high volatile hydrocarbons which combine with the gas to enrich it in its calorific value and the temperature of the gas goes down further.

 
Composition of Gas : Though for different biomass fuels, there may be little variation in gas composition as well as the heating value, the gas composition and calorific value in general are as follows :-


CO2 = 8 - *0%,        O2 = Less than 1.0%,            CO = *4 - *6%,
CH4 = 1.5 - 2%,        N2 = *4 - *6%,                      H2 = *0 - *2%.


CV. (Gorss)    =    ***0 - ***0 Kcal/ Normal cubic meter
Sp. Gravity    =    0.*2
Yield of Gas : 1.*0 - 1.*0 Normal cubic meter per kg. of biomass.
Tar & Particulate concentration in gas :
•    Below *0 mg/ Nm3 (in case of Power generation)
•    Below *0 mg/ Nm3 (in case of Thermal application )


Specific advantages of GP Gasifier systems are highlighted below for ready reference:- 

Continuous Operation: GP Gasifier plant is designed for continuous operation of *4 hours a day and at least up to **0 days at a stretch, after which a brief shut down of *5 days is recommended for annual maintenance. The plant may again be put to operation there after. On-line stand-by for all mechanical items like blower, motor, pump etc. are provided for this
purpose.

Higher Flexibility: It is a multi-fuel system. The plant can run with any one of the biomasses from a wide range, whichever available locally. Beside rice husk, the same plant may also run with wood block, saw dust, wood bark, sun flower seed husk, ground nut shell, coconut shell, corn cob etc. 

Unique Gas Cleaning System : GP Gasifier is  coupled with  a unique Gas Cleaning System to clean and cool the gas in TEN STAGES to ensure virtually tar-free gas for the engine.

Uninterrupted Power Supply : The modified diesel generating set, which normally runs with dual fuel i.e. gas and diesel oil, can also run with **0% diesel oil in the absence of gas just by changing a knob. Hence, uninterrupted power supply is assured even when plant is shut down for any reason.

Low Cost Power : The capital investment as well as the cost for generation of power is very low in comparison to any other system.

True value for investment: Great care has been taken for ensuring safe operation and long life. GP Gasifier Plant is designed to have a life of at least *5 years.

Government Support : Since GP Gasifier is approved by the Ministry of Non-conventional Energy Sources, cash subsidy and income tax benefits are made available by the government against GP Gasifier.

 

Country:	India
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FOB Price:	(Negotiable) Get Latest Price
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Minimum Order Quantity:	1
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Product Group :	BIOMASS GASIFICATION PLANT