Corn Stalk Biomass Gasification Power Plant

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Description

Corn Stalk Biomass Gasification Power Plant

Corn Stalk Biomass Gasification Power Plant

This project use corn cob as fuel. Project begins to run in the early of 2013 which can produce electricity 500KW/h.

Raw material / feed stock/ fuel:

Biomass gasification means incomplete combustion of biomass resulting in production of combustible gases, including Carbon monoxide (CO), Hydrogen (H2), Methane (CH4), CmHn, this mixture is called pyrolysis gas that can be used to run internal combustion engines, and generate CHP. The production of pyrolysis gas called gasification is partial combustion of biomass (such as rice husk, woodchips, saw dust, crop stalk, coconut hull, bagasse, olive pomace etc.). The reactor is called biomass gasifier.

Elementary content of syngas, biomass gas, biogas

Syngas composition from feedstock corn cobs:

 

 

Component

CO

H2

CH4

CmHn

H2S

CO2

O2

N2

 

Percentage

23.5%

7.68%

5.32%

0.75%

—

10%

0.11%

52.4%

 

 

 

 

 

 

Remark: Normally, After Our gasification system, the caloricity is more than 5.83MJ/Nm3, tar and dust less than 23mg/Nm3, temperature after treated less than 45 degree centigrade.

 

 

C + O2 = CO2

2H2 + O2 = 2H2O

C + CO2= 2CO

C + H2O = CO + H2

CO + H2O = CO + H2

C + 2H2 = CH4

CO2 + H2 = CO + H2O

Water for gas cleaning and cooling can be used in a circulating way without environmental pollution after it’s treated througffh water treatment facilities such as sediment pond, and a little of making-up water required. The water pond for each unit of 200kw plant only covers about 50m2.

2.Biomass Gasification for Power generation

Power generation by using biomass gas from rice husk, wood chips, saw dust, coconut husk, bagasse, crop stalks and olive pomace can not only save electricity expenses in the production cost for rice mills, timber processing mills, farm and plantations etc., but also get benefits from selling surplus electric power to the power grid.

The engines and generator, electrical equipments should be put indoors, and other equipments could be put outdoors. The construction area for each 200kw generator set is approximate 40~50m2.

The self-consumption power rate of full set of equipment is only 5~8% of the generated power. Therefore, such a project is an ideal one with significant benefits for the area where there is plenty of biomass resources but is short of electric power supply or with higher electricity expense.

In general, the investment for major equipment can be taken back from power generation benefits within first two years. The equipment can be safe and reliable operated with operational technology that’s easy to be mastered by workers, and the maintenance and repair work is similar to ordinary diesel generators.

3.FENGYU Fluid-bed Gasifier

FENGYU’s fluid-bed biomass gasifier (patented product of Fengyu Group) gets high conversion efficiency, by taking rice husk as an example, each KWH power generation consumes only 1.6~1.8kg rice husk, the unit fuel consumption will be still lower by using wood chips or crop stalks as fuel. When operation temperature is 800, the tar production ratio in fluid bed gasification furnace is about 2.5%. Tar content after decoking treatment is less than 50mg/Nm3, through strict cleaning and thermal cracking, the dust & tar content of biomass gas are very tiny, which can meet the requirement for the internal-combustion engine and steam turbine normal operation.

Biomass Gasification System series Specifications:

Parameter/Type

LHC-200

LHC-400

LHC-600

LHC-800

LHC-1000

LHC-1200

Generator rated output power(KW)

200

400

600

800

1000

1200

Productio Volume of Biomass gas(Nm3/hr)

800

1500

2250

3000

3650

4500

Gas temperature of gasification furnace outlet (°C)

700~800

700~800

700~800

700~800

700~800

700~800

Gas temperature of the outlet after cooling and cleaning (°C)

< 45

< 45

< 45

< 45

< 45

< 45

Consumption of biomass fuel (ton/hr)

0.3~0.36

0.6~0.72

0.9~1.08

1.2~1.44

1.5~1.8

1.8~2.16

Volume of circulating water flow (m3/hr)

6~8

12~15

18~23

24~30

30~37

36~45

Gross weight of gasification furnace (ton)

21.8

26.7

30.8

34.8

38.7

42.5

Ash removing manner

Wet or dry type (screw conveyer collection & discharger) 

Device of gas cooling & cleaning system

 cyclone separator+spray scrubber+venturi scrubber +spray cruber+ spray filter+roots blower+alkali water washer+ gas water separator

 

 Note:

Main components and caloricity of biomass gas are subject to characteristic of biomass fuel and gasification method.

The caloricity of biomass gasification gas is normally 1100-1500kcal/Nm3.(4.6~6.3MJ/Nm3)

For example, main component of rice husk gasified gas are as follows:

Component

CO

H2

CH4

CmHn

H2S

CO2

O2

N2

Percentage

17.2

4.05

6.82

1.24

—

15.1

0.8

54.7

(The caloricity is:1393kcal/ m3 (5.83 MJ/Nm3)

When operation temperature is 800°C, the tar production ratio in fluid bed gasification furnace(patented product of Fengyu Group) is about 2.5%. Tar content after treatment is less than 50mg/m3, through strict cleaning and thermal cracking, the dust & tar content of biomass gas are very tiny, which can meet the requirement for the internal-combustion engines normal operation.


 

 

 

Additional information

Brand Name:

FENGYU

Model Number:

LHC-500

Place of Origin:

Chongqing, China

Application:

Electricity

Calory (J):

6000

Hydrogen Content (%):

4.05

Methane Content (%):

6.82

Nitrogen Content (%):

52.4%, 54.7