Basic Info.
Transport Package
Wooden Case
Product Description
Biomass carbon-vapor co-production is the process of producing carbonized materials and vapor with biomass materials, in which materials are heated in an air-isolation environment to reduce content of elements other than carbon. Main structure of the plant consists of a material bin, an elevator, a feeder, a furnace stack, refractories, a rotator, a temperature detector, a PLC cabinet, a cooler, a settling chamber, a waste heat boiler, a fan, and a deduster.
The carbonization process is an integration of material carbonization and vapor production based on end gas therefrom.
Carbonization Process
The carbonization process is actually a destructive distillation process at low temperature, in which materials are heated in a low-temperature and air-isolated environment to volatilize low molecular compounds, and then trigger a series of complicated physical and chemical changes in materials, which involves physical changes such as dehydration, degasification and drying. The process causes materials to discharge oxygen, hydrogen and other non-carbon substances, and recombine into substances in ordered graphite microcrystalline structure. Gaps among microcrystalline in these crystals formed with irregular hexagon carbon atomic planes are initial pores of the carbonized materials. Therefore, purposes of carbonization are changing materials into secondary pore structures adapted to activation, and rendering them with mechanical hardness required for undergoing the activation.
Requirements on carbonization of materials are obtained through carbonization.
Appearance of carbonized materials shall meet requirements in dimension
and shape. Inner structure of carbonized materials shall offer specific initial pores
and high mechanical hardness. The carbonization process may be divided into
the following sections.
(1) Drying section at a temperature below 150°C. External and internal
moisture of materials evaporate in external heat, and shape of materials
remains.
(2) Pyrolysis section at a temperature between 150-300°C. Materials
decompose and release gaseous products (CO, CO2, H2 S, etc.), changes of
chemical composition of material initiates. Pyrolysis temperature varies with
specific materials, which is lower for low- metamorphic grade materials.
(3) Carbonization section at a temperature between 300--600°C.
Polycondensation and thermolysis cause materials to separate volatile
components out. The majority of tar, methyl alcohol, ethylene and other
products are separated in this section. Materials are gradually softened and
melted in this section, forming a plastic mass mixed by gas, liquid and solid
substance, which will be converted into semi- cokes in needle-shape or bulk.
Constant temperature and heating rate are key operable conditions
for carbonization process.
Heating rate is critical for productive ratio of carbonized products.
A high heating rate can separate out more tars and coal gas, and thereby
reduce productive ratio of carbonization. A lower heating rate may prolong
the duration of materials in low-temperature section, offering more options of
pyrolytic reactions which break weaker bonds in molecular in initial pyrolysis,
and form structures with higher thermal-stability in parallel sequential thermal
polycondensation, and thus reduce volatile productive rate of pyrolysis in
the high-temperature section, and achieve higher productive rate of solid
carbonized products (carbonized materials).
Quality of carbonized materials output from carbonization process shall
be evaluated considering volatiles content, moisture content and hardness.
Qualified carbonized materials shall be with a volatiles content of 12%- 16%,
a moisture content of 15%-25%, and a ball-pan hardness of 90%.
As measurements of the above indexes are time-consuming, and
immediate evaluation on carbonized materials are required in on-site debugging
for further adjustments on parameters, visual inspection and evaluation are
acceptable. Qualified carbonized materials shall have smooth and crack- free
surfaces, high hardness and uniform sections.
Treatments on End Gas and Generation of Vapor with Waste Heat
Carbonized end gas of the carbonization process consists of
high-temperature heating gas generated from combustions of external fuels,
which including CO2. H20, N2 and a trace of SO2 and CO, and volatiles
generated from thermal decompositions, which including CO, H2, CH4, alkane,
olefin and tar. Traces of toxic matters in end gas of carbonization may cause
contamination without proper treatments.
With the burning method, end gas from carbonization are transfused into
a settling furnace at a high-temperature (800-950°C) environment with excess
air, in which combustible gases and toxic substances will be burnt into CO2
and dumped. Heat generated by the such combustions may be recycled by the
waste heat boiler for vapor production. It is a low-cost simple method which
could eliminate most of environmentally harmful substances, and generate vapor
required for carbonization, therefore, the method is widely used in production of
activated carbons.
A large amount of vapor could be produced with the heat generated by
fume combustions.
Address:
5/F, Building 4, No. 498 Guoshoujing Road, Pudong New District, Shanghai, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
Shanghai Activated Carbon Group Co., Ltd. Specializes in providing a superior range of high quality activated carbon production equipment, has over 10 years of industry experience. Our company has a high-quality team engaged in product R&D, production and processing, assembly commissioning, and after-sales service, professional team reached more than 100 staff. With professional strength and high market share, now our products go into markets around the world. Our company′s products and equipment cover Activation Production Line for Activated Carbon, Biomass Carbon-Vapor Co-production Plant, External Thermal Biomass Carbonization Plant, Hazardous Waste Activated Carbon Regeneration Plant, Crushing and Screening Plant, Garbage/Sludge Carbonization Weight-reduction Treatment Plant, and Hazardous Waste Gas Treatment Plant, etc, all the plants have received ISO9001 and ISO14001 accreditation. All the indices of our products exceed national standards.
We have more than 10 national patents and internal institute of environmental engineering which focuses on high-end technology research and development of activated carbon equipment. We have the know-how and expertise to deliver solutions for waste gas/water treatment. Our products are applied to various industries in China, moreover, we have undertaken several projects of automatic activated carbon production equipment in Thailand, Indonesia, Korea and Sri Lanka, Russia and other countries, the high quality products and excellent service have been unanimously praised by domestic and overseas clients.
In the future, we′ll continue to serve our customers with high-quality products, reasonable prices and excellent service, always adhere to "quality first, customer first"business philosophy.