Carbon fiber continuous carbonization furnace
Nov 30,2022
New energy to promote the rapid growth of carbon fiber demand
Carbon fiber is made of polyacrylonitrile, or pitch, viscose and other organic fibers in high temperature environment cracking carbonization of the formation of carbon content is higher90%The carbon main chain structure inorganic fiber has excellent mechanical properties and chemical stability, and has a series of other materials, such as light weight, high strength, high modulus, electrical conductivity, thermal conductivity, corrosion resistance, fatigue resistance, high temperature resistance, small expansion coefficient and so on.
With“double carbon”With the landing of the policy, the development of the domestic carbon fiber industry ushered in a golden moment. Wind power, electric vehicles, hydrogen energy, photovoltaic and other fields are all industries with comparative advantages in China, and they are also industries supported by the state. The demand for carbon fiber in related fields is growing rapidly and the market capacity is large, which can not only stimulate the demand for carbon fiber, but also better solve the serialization, differentiation and extension of the development of the carbon fiber industry.
Wind power installed capacity and large-scale fan blades drive up the demand for carbon fiber.
Carbon fiber blades have the advantage of high cost performance in large-scale blades. Under the premise of meeting the stiffness and strength, carbon fiber is lighter than FRP blades.30%Above. Current wind wheel diameter has broken through120m, blade weight up18Tons, carbon fiber blades reduce weight while improving power generation efficiency and reducing blade costs, especially with the background of the continuous decline in the price of wind power, carbon fiber blades in large-size blades in the cost-effective advantages highlighted.
Carbon fiber for wind turbine blades is mainly used at home and abroad.T300Level24K,48K,50Kand other products. Overseas is mainly Toray's Drotek (U. S.+Mexico+Hungary), Mitsubishi of Japan, Sigri of Germany and Formosa Plastics, TurkeyDowaksaJilin Carbon Valley in China+Baojing's products are also basically able to meet the needs of downstream customers.
We expect2030The global demand for carbon fiber for wind power blades will form.10The 10,000-ton market is the existing wind turbine blade market.3times,CAGRAbout13%.
Under the dual carbon strategy, a number of new energy tracks continue to drive the growth of carbon fiber demand.
Under the wave of energy change, the photovoltaic industry is developing rapidly, and hydrogen fuel cells are also gaining momentum. These emerging industries also drive a substantial expansion of carbon fiber demand.
Photovoltaic field:Carbon fiber is suitable for the thermal field of single crystal furnace by using its heat-resistant characteristics. As consumables, carbon fiber crucible has the advantages of low energy consumption and long service life compared with graphite crucible, and carbon fiber crucible is more suitable for large-size silicon wafers,2021Global carbon fiber demand for carbon thermal field in0.85Ten thousand tons, reference2021Annual PV Installed133GWto measure, we predict2030Global PV new installed capacity reached435GWThe corresponding carbon-carbon thermal field carbon fiber demand is approximately.2.6million tons.
Hydrogen energy field:Carbon fiber is an ideal material for high-pressure hydrogen cylinders, and China gives strong support to the hydrogen energy industry.2025The annual hydrogen energy vehicle is expected to reach10About ten thousand.
2021Global hydrogen vehicle sales in1.63According to the White Paper on China's Hydrogen Energy and Fuel Cell Industry (2019Version) "to calculate, assuming2025Global hydrogen vehicle shipments in5million,2030Annual hydrogen energy vehicle shipment100Ten thousand. If calculated according to the heavy truck, the bicycle needs10a hydrogen cylinder,35KPaThe mainstream hydrogen cylinder needs about carbon fiber40Kilograms.2021Global pressure vessel carbon fiber market in1.1According to our estimates, the demand for hydrogen vehicles is about2Thousands of tons, other traditional fields9Thousands of tons,2030Global hydrogen vehicle shipments in100Ten thousand vehicles will correspond to the pressure vessel carbon fiber market.13.410,000 tons, becoming the first major carbon fiber application after wind power blades.
In summary, according to our calculations, the global market demand for carbon fiber will benefit from the growth of the new energy industry.2030Annual growth38.2Tons, compared2020year,10Annual growth2.5times,CAGR=13.5%.
Carbonization furnace is the core equipment of carbon fiber preparation
midstream carbonization: the process again contains①Pre-oxidation,②carbonization (carbon fiber,90+%carbon content,1000-2000 ℃),③graphitization (graphite fiber,99+%carbon content,2000-3000 ℃),④Surface treatment (lifting and resin adhesion),⑤Crimp (finished products are generally sold by volume) and other links, after carbonization into black silk;
During the carbonization process, the pre-oxidation furnace and the low-temperature carbonization furnace are the key equipment for the carbonization process. in the process of manufacturing polyacrylonitrile-based carbon fiber,PANThe structure was transformed from organic precursor to inorganic carbon fiber after two major changes. One is to make it linear during the pre-oxidation process.PANThe molecular chain is transformed into a heat-resistant ladder-type structure of the pre-oxygen wire; the second is in the carbonization process, the ladder-type structure of the pre-oxygen wire is transformed into a carbon fiber straddling graphite structure.
Carbonization Furnace Realizing Inorganic Carbon Fiber with High Carbon Content
The organic pre-oxygen wire with heat-resistant ladder structure is converted into carbon content after high temperature heat treatment.92 %The above inorganic carbon fiber. The key equipment to achieve this conversion is the carbonization furnace. Engineering practice and research show that the core technology is wide mouth carbonization furnace and its supporting labyrinth seal, exhaust gas removal and drafting system. ForhtGrade carbon fiber production line, the furnace mouth width should be in.1 mAbove, and to positive pressure operation, you need a non-contact labyrinth seal device; in order to make the pyrolysis waste gas does not pollute the fiber, the removal system should be smooth and instantaneous discharge; drafting system is an important means to manufacture high-performance carbon fiber.
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