Biomass Production Facilities

Biomass production and treatment is a crucial industry for implementing the concept of green and low-carbon development. Using agricultural and forestry waste, straw, and sawdust as raw materials, it can produce a variety of high-value-added products such as biochar, biogas, and bio-oil through a series of processing steps. These products are widely used in energy supply, chemical raw materials, and soil improvement. Tianli is deeply involved in the field of biomass resource utilization, having developed a complete set of standardized biomass production equipment. This equipment integrates supporting facilities such as biomass steam rotary pre-drying, rotary kiln pyrolysis, and volatile matter recovery, achieving closed-loop operation throughout the entire process. Relying on advanced technology and intelligent control, we provide customers with efficient, low-consumption, environmentally friendly, and intelligent production solutions, contributing to the resource utilization of agricultural and forestry waste and the green upgrading of industries.

I. Properties of Core Materials

The core materials of this production unit are biomass raw materials, intermediate products, and finished products. Biomass raw materials (straw, sawdust, agricultural and forestry waste, etc.) are pale yellow to brown solids, mainly composed of cellulose, hemicellulose, and lignin, with moisture content of 15%-30% and density of 0.3-0.5 g/cm³. They are flammable and easily degradable, making them the core raw material for production. Intermediate products include pyrolysis gas and bio-oil. Pyrolysis gas is combustible gas rich in methane and carbon monoxide, which can be recycled; bio-oil is dark brown liquid and is flammable. The finished product is mainly biochar, appearing as black granules with density of 0.8-1.0 g/cm³. It has well-developed pores and strong adsorption capacity with purity ≥90%. Strict control of temperature and humidity is required at each stage of the production process to ensure product quality and production safety.

II. Core Process Flow Introduction

Biomass production adopts fully closed-loop process flow of raw material pretreatment → steam rotary pre-drying → rotary kiln pyrolysis → volatile matter recovery → finished product refining, equipped with core equipment such as steam rotary dryers, rotary kilns, and volatile matter recovery devices. Each section is closely connected and the entire process is controllable. Specific details are as follows:

1. Raw material pretreatment: the biomass raw materials are crushed and screened to produce uniformly sized pellets (5-10mm) to remove impurities such as stones and metals to avoid damaging the equipment; then they are sent to the raw material storage silo for later use to ensure stable supply of raw materials.

2. Biomass steam rotary pre-drying section: raw materials are fed into a steam rotary pre-dryer, which uses the waste heat recovered during the production process to generate steam. The rotation of the rotary cylinder ensures that the raw materials are in full contact with the steam, and the drying temperature is controlled to reduce the moisture content of the raw materials to 8%-10%. This process removes excess moisture, improves pyrolysis efficiency, and enables the recycling of waste heat, thus saving energy and reducing consumption.

3. Pyrolysis section of the rotary kiln: the dried biomass pellets are fed into the rotary kiln. In the rotary kiln, the temperature is controlled in an oxygen-free or oxygen-deficient environment to carry out the pyrolysis reaction, which decomposes the biomass pellets into biochar, pyrolysis gas (volatile matter) and a small amount of bio-oil. The rotary kiln adopts a sealed design to prevent air from entering and causing the raw materials to burn, thus ensuring the stability of the pyrolysis reaction.

4. Volatile matter recovery section: the pyrolysis gas (volatile matter) generated by the rotary kiln is sent to the volatile matter recovery device through pipelines. After cooling, the bio-oil is separated. The bio-oil can be collected and used as chemical raw material or fuel. The remaining pyrolysis gas is purified to remove impurities. Part of it is used for heating the rotary kiln, and part of it can be recovered as clean energy, so as to achieve energy self-sufficiency and improve resource utilization.

5. Finished product refining: after calcination, the biochar is cooled and sieved to remove fine powder and impurities, resulting in finished biochar with uniform particle size. Depending on the requirements, it can be further crushed and shaped into products of different specifications, sealed and packaged, and then stored in the warehouse. The small amount of dust generated during the production process is treated by dust removal device and discharged to atmosphere after reaching the emission standard.

III. Core Technical Advantages

1. Technical advantages: the system integrates the entire process of steam rotary pre-drying, pyrolysis in the rotary kiln, and volatile matter recovery, with complete supporting equipment, mature and stable technology, and adaptability to different types of biomass raw materials. The steam rotary dryer provides uniform drying and high efficiency, the pyrolysis conversion rate in the rotary kiln is ≥95%, and the volatile matter recovery and utilization rate is ≥90%. The modular design of the equipment makes operation and maintenance convenient, enabling continuous and large-scale production and adapting to different production capacity requirements.

2. Energy consumption advantages: pre-drying section utilizes waste heat to realize energy recycling and significantly reduce external energy consumption. The energy consumption distribution of the entire process is optimized, and the overall energy consumption is reduced by more than 30% compared with traditional biomass production equipment, significantly reducing the production cost of enterprises.

3. Environmental advantages: the entire production process adopts a closed system. Dust is treated by dust removal device before being discharged, and exhaust gas is purified before being discharged into atmosphere. No harmful wastewater is generated during the production process. Biomass raw materials are renewable resources, realizing turning waste into resources. This aligns with the green, low-carbon and circular development concept and fully meets environmental emission requirements.

4. Product advantages: the finished biochar has purity of ≥90%, well-developed pores, and strong adsorption capacity, and it can be flexibly used in soil improvement, waste gas treatment, fuel and other fields. At the same time, it can recover by-products such as bio-oil and pyrolysis gas, thereby increasing the added value of the product. The product quality is stable for reaching industry standards with strong market competitiveness.

5. Control advantages: equipped with fully automatic DCS intelligent control system, it monitors key parameters such as temperature, humidity, pyrolysis rate, and volatile matter recovery efficiency in each process section in real time, achieving precise control of the entire process. It has automatic alarm and emergency shutdown functions, can be operated remotely, reduces manual intervention, ensures stable and safe operation of the equipment, and ensures uniform product quality.

Tianli focuses on the core needs of biomass production, creating efficient, environmentally friendly, and intelligent production facilities. Leveraging our comprehensive advantages in technology, energy consumption, and environmental protection, we provide complete biomass resource utilization solutions for various industries, helping enterprises reduce costs, increase efficiency, and achieve green development, thus promoting the high-quality upgrading of the agricultural and forestry waste resource utilization industry.