20 T/H Miscanthus Grass Pellet Production Line In USA

Various forms of new energy come directly or indirectly from the heat energy generated by the sun or the interior of the earth. Including energy generated from solar energy, wind energy, biomass energy, geothermal energy, nuclear fusion energy, water energy and ocean energy, as well as biofuels and hydrogen derived from renewable energy sources.

With the development of the economy, biomass will be valued and favored as a clean energy source, and biomass power plants will continue to expand. Grass and straw pellets can replace raw coal and fuel oil, and are widely used in biomass power plant gasification boilers, domestic boilers, heating stoves, hotels, restaurants and other industries.

It can be directly used in traditional coal-fired boiler equipment in cities and can replace traditional coal. Therefore, the demand for biomass pellets will continue to grow.

In this context, this American customer invested US$550,000 to build this grass pellet production line project. This project is of great practical significance to the local society. While achieving social and economic benefits, it also minimizes the impact on the surrounding environment through pollution control measures.

• Annual output: 50,000 tons of grass pellets
• Annual operating hours: 2400
• Hourly production: 20 tons per hour
• Total investment: US$550,000
• Number of employees: 10 people
• Working system: Production adopts a single-shift system, each shift works 8 hours, and the annual working time is 300 days.
• Annual electricity consumption: 600,000 kw·h.

This project is currently the largest output project established by RICHI in the United States. Other pellet production line projects include 10t/h hemp feed production line in USA, 10t/h wood pellet plant in USA, etc.

Project construction content and scale

The 20t/h grass pellet production line in USA project is planned to have a construction area of 5,000 square meters, including a production workshop of 3,200 square meters, a warehouse of 1,500 square meters, and a comprehensive office area of 300 square meters.

The factory is equipped with 1 forage grinder, 1 crusher, 4 grass pellet machines, fans, dust collectors and other production equipment. Equipped with the construction of auxiliary facilities such as power supply and distribution, water supply and drainage, and forming an annual production capacity of 50,000 tons of biomass pellets. The main engineering contents of the proposed project are shown in the table below:

Main raw and auxiliary materials and their consumption

The raw material consumption of new 20t/h grass pellet production line in USA project is shown in the table below.

Note: The moisture content of miscanthus and straw is 20-40%, and it is dried by natural drying. The moisture content of grass and straw used for biomass pellet processing is controlled at about 15-20%.

If the raw material is too dry, carbonization and cracking on the particle surface during the compression process may cause spontaneous combustion; if the raw material moisture is too high, the water vapor generated during the heating process cannot be discharged smoothly, which will increase the volume and reduce the mechanical strength.

According to information provided by the owner, the moisture content of grass and straw will be controlled when purchasing grass and straw for this project, so there is no need to set up a drying process.

Equipment of 20 t/h grass pellet production line in USA

Process flow of 20 t/h grass pellet production line in USA

1. 1st Crushing and screening: Put the purchased miscanthus, hay, flax straw into the grass cutter and grass crusher in proportion for crushing, so that the raw materials become smaller particles. A strong magnet is placed in the sealed conveyor belt to remove the metal impurities mixed in the miscanthus grass and straw material is absorbed cleanly.
2. 2nd Crushing: The smaller particles obtained after crushing are transported into the hammer mill crusher using a conveyor belt to be crushed into powder, so that the raw and auxiliary materials can be more fully granulated.
3. Granulation: The material is transported to the grass pellet mill through a sealed conveyor belt. The friction between the machine and the biomass raw material generates heat, and is extruded from the die hole to obtain a solid molded fuel of a certain shape and scale.
4. Cooling and packaging: The cooling method of this project is natural cooling. The discharged grass pellets enter the finished product area through a belt conveyor for packaging.

Floor layout design

The 20t/h grass pellet production line in USA project has an advantageous geographical location, convenient transportation, complete basic supporting facilities such as water supply, power supply and drainage, and the client company has good development prospects.

On the premise of meeting the technological process, this 20t/h grass pellet plant in USA project considers transportation, fire protection, safety, sanitation and other requirements, combines the natural terrain conditions of the project site, and divides and combines various facilities according to different functions.

It strives to have a compact and reasonable layout, save land, and benefit production and convenient management. The specific contents are as follows:

• Production area: The cutting, crushing, granulation and screening areas of this project are mainly located on the east side of the factory area and are laid out according to the production process to reduce intermediate material transportation links.
• Product warehouse: Located on the east side of the production workshop, it is connected to the production workshop to facilitate the transfer and storage of products.
• Raw material storage yard: Located on the west side of the factory area, it is used for the temporary storage of purchased raw materials.
• Office: Located on the north side of the factory, it is an independent building to reduce the impact of the production plant on itself.

Generally speaking, the factory layout of 20t/h grass fuel pellet production line in USA is reasonable, logistics is smooth, and sanitary conditions, transportation, safety, and fire protection all meet the needs of the enterprise and the requirements of the industry and competent authorities.

Environmental management

Exhaust gas

The main source of waste gas pollution in this 20t/h grass pellet production line in USA project is the waste gas generated during the crushing, crushing and granulation processes. The waste gas emissions meet the "Comprehensive Emission Standards for Air Pollutants".

Bag dust collector is a dry dust collector, suitable for collecting fine, dry, non-fibrous dust. Bag dust collection has the following advantages:

• High dust removal efficiency, it can capture fine dust with a particle size greater than 0.3 microns, and the dust removal efficiency can reach 99%;
• Flexible in use, with a wide range of air handling volume;
• The structure is relatively simple and the operation is relatively stable. Compared with the electrostatic precipitator, the initial investment is less and the maintenance is easy.
  Bag dust collectors have excellent processing effects on dust-containing gases and are widely used in the mechanical processing industry. Compared with the use effects of general processes, the dust removal efficiency can reach more than 99%. Therefore, the use of bag dust collectors in this project is technically feasible.

The waste gas prevention and control measures in this project mainly consist of gas collection devices, bag dust collectors and fans. Exhaust gas prevention and control facilities account for 0.75% of the total investment, so the project’s exhaust gas prevention and control measures are economically feasible.

In summary, the exhaust gas treatment facilities of this 20t/h grass pellet production line in USA project fully take into account economy and environmental protection, and set up exhaust gas treatment facilities to meet the needs of technical and economic feasibility and accessibility of pollutant emissions. From this, it can be concluded that the exhaust gas treatment facilities The project’s exhaust gas treatment plan is reasonable.

Noise control

After the 20t/h grass pellet production line in USA project is completed and put into operation, the noise emission at the factory boundary will meet the "Environmental Noise Emission Standard for Industrial Enterprises at the Factory Boundary", and the overlay value of environmental protection targets will meet the requirements of the "Acoustic Environment Quality Standard".

Therefore, this project will not change the current status of its acoustic environment. In order to further reduce project noise, the project takes the following measures:

• When selecting equipment, we select environmentally friendly equipment with lower noise values for our customers, and install vibration isolation devices and sound isolation rooms for such equipment;
• The high-noise equipment in the project workshop is arranged in the middle, away from retail investors. Reduce the impact of project operation noise on factory boundary environmental noise from the aspects of noise sources and noise transmission channels;
• It is recommended that customers strengthen management, improve employees’ environmental awareness education, promote civilized production, and reduce man-made noise;
• Establish a management system for regular equipment maintenance and upkeep to prevent abnormal production noise caused by equipment failure;
• For mobile sound sources (cars) in the factory, the traffic management system should be strengthened. It is strictly prohibited to blow horns, drive at a limited speed in the factory area, etc. At the same time, strengthen the management and maintenance of transportation vehicles to keep the vehicles in good condition. Motor vehicle drivers are required to Limit vehicle speed when passing through noise-sensitive areas and try to avoid night transportation;
• For workers, on-duty personnel or maintenance personnel who are frequently exposed to high noise sources, personal protection should be strengthened and they should wear noise-proof earplugs, earmuffs and other labor protection supplies.

Solid waste management

The solid waste generated by the 20t/h grass pellet production line in USA project mainly includes employees' domestic garbage, dust collected by bag dust collectors, rejected metal objects, unqualified products, waste lubricating oil, etc.

Employee domestic waste is collected centrally by the enterprise and handed over to the local environmental sanitation department for processing; dust and unqualified products collected by bag dust collectors are collected centrally by the enterprise and reused in production; rejected metal objects are collected and sold outside.

Waste lubricating oil is collected as hazardous waste Temporarily stored in the warehouse and handed over to qualified units for processing on a regular basis.

General solid waste storage sites take the following measures:

• In order to prevent rainwater runoff from entering the storage and disposal sites and avoid increasing the amount of leachate, diversion channels should be installed around the storage and disposal sites. Build leachate collection and drainage facilities.
• Take shielding measures at temporary storage points to prevent dust.
• Environmental protection graphic signs need to be set up at the storage site.
• In general industrial solid waste storage and disposal sites, it is prohibited to mix hazardous waste and domestic garbage.
• Establish an inspection and maintenance system. Regularly inspect and maintain facilities such as embankments, dams, retaining walls, diversion channels, etc. If possible damage or abnormalities are found, necessary measures should be taken promptly to ensure normal operation.

The collection and storage of hazardous waste generated by the 20t/h grass pellet production line in USA project must meet the following requirements:

• Detailed operating procedures should be formulated for the collection of hazardous wastes, which should at least include the scope of application, operating procedures and methods, special equipment and tools, transfer and handover, safety assurance and emergency protection, etc.
• Hazardous waste collection and transfer workers should be equipped with necessary personal protective equipment according to work needs, such as gloves, protective glasses, protective clothing, gas masks or masks, etc.
• During the collection and transfer of hazardous wastes, corresponding safety protection and pollution prevention measures should be taken, including explosion prevention, fire prevention, poisoning prevention, infection prevention, leakage prevention, flying prevention, rain prevention or other measures to prevent environmental pollution.
• When collecting hazardous waste, the packaging form should be determined based on the type, quantity, hazardous characteristics, physical form, transportation requirements and other factors of hazardous waste.
• When collecting hazardous waste, a record form should be filled in and properly kept as an important file for hazardous waste management.
• After collection, the collection operation area should be cleaned and restored to ensure that the environment in the operation area is clean and safe.
• When containers, equipment, facilities, places and other items that have collected hazardous waste are converted to other uses, contamination should be eliminated to ensure their safety.
• Special tools should be used for the internal transfer of hazardous waste. The internal transfer of hazardous waste should refer to the "Hazardous Waste In-plant Transfer Record Form".

To sum up, the solid waste generated by the proposed project has been properly treated and disposed, and the impact on the external environment will be small.

Currently, in addition to this 20t/h grass pellet production line in USA project, Richi Machinery's projects in the United States also cover wood pellet processing, ruminant feed processing, organic fertilizer pellet processing, etc. If you are interested in our projects and equipment, please contact Richi Machinery for details!