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20,000 Tons of Straw Biomass Pellet Production Line Project

Date: 12/25/2020 08:56:46 From: Clicks:

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This project is an annual production line of 20,000 tons of straw and rice husk sawdust biomass pellets, which is 8 tons of sawdust per hour, rice husk, rapeseed stalk and corn stalk pellet production line. The raw materials of the project are sawdust, rice husk, rapeseed stalk, corn stalk and other agricultural and forestry wastes. The biomass pellet machine is used to produce biomass pellet fuel. Let's look at the analysis of the sawdust rice husk biomass pellet production project. The main raw and auxiliary materials are shown in Table 1, and the main equipment is shown in Table 2. 

20,000 Tons of Straw Biomass Pellet Production Line Project
20,000 Tons of Straw Biomass Pellet Production Line Project

1. Consumption of Raw and Auxiliary Materials for the Production of Straw, Sawdust and Rice Husk Pellets

Straw Sawdust and Rice Husk Pellets
Straw Sawdust and Rice Husk Pellets

Table 1 Consumption of main raw and auxiliary materials of this project

Serial number name Annual consumption (t/a)
1 Sawdust 12000
2 rice husk 8000
3 Rapeseed stalk 5000
4 Corn stalk 5000

2. Equipment Required for the Production of Straw Sawdust and Rice Husk Pellets

Table 2 Main equipment of this project

Serial number Equipment name Model specification unit Quantity
1 Dryer 3600 station 1
2 Sawdust granulator MZLH420 station 3
3 Screening machine / station 1
4 Hoist / station 1
5 Belt conveyor custom made station 4
6 Dryer 3600 station 1
7 Automatic weighing and packing machine 25kg station 1
8 Weighbridge 100t station 1
9 Forklift / Vehicles 1
10 Catch the car / Vehicles 1
11 Forklift / Vehicles 1

3. Project Design of Straw Sawdust Rice Husk Pellet Production Project

Table 3 List of main product plans of this project

Serial number product name specification Design ability ( t/a ) Annual operating hours
1 Straw pellets According to order 20000 2400h/a

4. Production Quality Index of Straw Sawdust Rice Husk Pellets

Table 4 Product quality indicators of this project

project symbol unit index
Total moisture Mt % ≤15
Ash To % ≤15
Volatile Vd % ≥63
Total sulfur St,d % ≤0.05
Heat MJ/kg ≥14

5. The Content of the Straw Sawdust Rice Husk Pellet Production Line

The project covers an area of ​​4600m2 and the main building area is 4600m2. See Table 5 for details.

Table 5 List of construction contents of this project

category Building name Designing ability Remarks
structural work Manufacturing Plant Annual output of 20,000 tons of straw pellets Building area 2300m 2 , leased
Auxiliary engineering Office Daily administrative office Building area 200m 2 , brick concrete
Canteen, dormitory For staff accommodation Building area of ​​600m 2 , brick and concrete
Public works powered by Annual electricity consumption 1.5 million kWh Provided by the local power grid
Water supply Annual water consumption 300m 3 Provided by the local water pipe network
drain Mainly domestic sewage, the amount of wastewater generated is 240m 3 /a Rainwater and sewage diversion, rainwater from the factory area enters the rainwater pipe network of the park, and domestic sewage is regularly cleaned out after treatment in the septic tank and used as agricultural fertilizer
Storage and Transportation Engineering warehouse For storage of raw materials and finished products Building area 3256m 2 , leased
Off-site transportation Entrust social vehicles for transportation /
In-plant transportation Forklift, forklift /
Environmental Engineering Waste gas treatment Furnace flue gas, drying dust: Shakelong dust removal + water film spraying + three-stage precipitation + 20m high exhaust tube high-altitude discharge
Granulation: cyclone + bag filter
oil fume: oil fume purifier
Wastewater treatment Septic tank Used as fertilizer, not discharged
Solid waste treatment General solid waste temporary storage /
Noise processing Choose low-noise equipment and reasonable layout; local noise reduction and sound insulation; sound insulation of workshops, etc. /

6. Public Works of Straw Sawdust Rice Husk Pellet Production Line:

① Water supply and drainage

Water supply: The water for the project is provided by the local tap water pipe network, and the water consumption is 1m3/d (300m3/a).

Drainage: The wastewater of the project is mainly domestic sewage with a production volume of 0.8m3/d (240m3/a). After treatment in a septic tank, it is used as agricultural fertilizer and is not discharged.

② Power supply

The electricity used by the project is drawn from the power supply network of the park. The annual electricity consumption of the project is 1.5 million kWh, which can meet the electricity demand of the project.

③ Storage and transportation engineering

Set up a raw material/finished product warehouse with a construction area of ​​1200m2.

The transportation within the factory relies on manual handling or forklift, and the transportation outside the factory is commissioned by social vehicles.

7. Work System and Labor Quota

Work system: This project adopts a single-shift system, 8 hours per shift, 300 days of work per year, and 2400 hours per year.

Labor quota: 10 labor quotas for this project, including 3 administrative and management personnel.

8. Environmental Protection Investment in Straw Sawdust Rice Husk Pellet Production Line

The environmental protection investment of this project is 310,000 RMB, accounting for 3.1% of the total investment of 10 million RMB. See Table 6 for a list of environmental investment and facility budget estimates for this project.

Table 6 Environmental protection investment estimates

Pollutants Governance measures Treatment effect Investment
(ten thousand yuan)
Boiler flue gas, drying dust Shakron dust removal + water film spray + three-stage precipitation + 20m high exhaust cylinder high-altitude discharge Discharge 15 Designed, constructed and put into operation simultaneously with the main project
Granulating dust Cyclone + Bag Dust Collector 5
Lampblack Oil fume purifier Discharge 1
ammonia nitrogen, TP
Septic tank Used as fertilizer, not discharged 2
noise Vibration and sound insulation,
reasonable layout
Discharge 5
Employee household waste, screening impurities General solid waste yard and garbage bin Secure temporary storage 3
total 31  

9. Process Flow of Straw Rice Husk Pellet Production Line

(1) Screening: The raw materials used in this project are determined according to the order requirements and the market raw materials. The main types are sawdust, rice husk, rapeseed stalk, and corn stalk. Among them, rice husk, rapeseed stalk, and corn stalk are all crushed raw materials. . After the raw materials enter the factory, they enter the screening machine for screening to remove impurities, such as some large pieces of straw and bark. The main pollutants in this process are the filtered impurities and equipment noise.

(2) Drying: Sawdust mainly comes from wood processing plants. During the wood processing process, water will be carried out. Therefore, the moisture content of the produced sawdust is relatively high, about 60%-80%, and it cannot be directly fed into the pelletizer for granulation. , It needs to be dried first. After screening, it enters the horizontal dryer through a hoist. A steam boiler provides the heat source. After drying, the moisture drops to about 15%. The pollutants produced in this process are mainly drying waste gas and dust.

(3) Granulation: The dried sawdust or the sieved rice husk, rapeseed stalk, corn stalk, etc. are sent to the raw material warehouse by the conveyor belt, and then conveyed by the auger into the granulator for granulation. The pellets are made into finished products by extrusion molding. The extrusion process is a physical process, no adhesive is added, no chemical reaction occurs, and a small amount of dust is generated in this process.

(4) Cooling: The prepared straw particles enter the packaging machine through a hoist, and cool naturally during the hoisting process.

(5) Packaging: This project uses a fully automatic weighing and packaging machine for packaging.

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