Report on Feasibility Analysis of Continuous Canned Device Extracting Carbon Black and Rubber Oil from Scrap Rubber
      I. Background and significance of project development
      With the increasing social modernization, on one hand, the rubber industry has been vigorously developing, and the rubber products have been widely used in all works of life; but on the other hand, more scrap articles are produced and accumulated to big amount as a result of erode-resistant characteristic of the rubber, thus posing a big public hazard to the environment and hygiene. What is worse, the problem has become more severe in recent years; hence, people vividly described it as “black pollution”. Compared with developed western countries, China are very inexperienced in handling the pollution of scrap rubber, besides, the fund and market are big problems too.
      China, today has leapfrogged to the third place in the world list of annual tire output, exceeding 0.13 billion. Waste tires left are over 65 million every year and the number will continue to rise by double digit yearly. 70% of waste tires are not reclaimed for use, besides, less than half of waste bias tires are reclaimed. China is currently suffering from an insufficient rubber source, which is mainly exported from outside countries. Hence, to improve the management of reclaiming waste tires has called an immediate action.
      A simplest method to handle rubber wastes is to produce reclaimed rubber powder and refine oil. Comparatively, producing reclaimed rubber restricts the future development of reusing rubber wastes as a result of its disadvantages like the high manufacturing cost, narrow sales channel and short service life of plastic runway and other products made. Oil refining has attracted people’s attention with its good sale, fast turnover speed on current fund and high margin. For instance, the average price for recycling waste tires in China is 1200 RMB/ton at present; the rate of oil refined from waste tires is up to 45% plus the production cost like fuel, labor, water and power expenses; therefore, to produce one ton of tire oil will only cost about 2600 RMB, compared with its current market price---3800RMB/ton.
The main engine of oil chemistry equipment with waste tires deployed in China mainland, mainly uses vertical fixed processor with processes below: first, the waste tire is put via the cracking processor top by the operator; second, seal the feed inlet and the processor bottom will slowly heat the tire with residues, coal or firewood left as the fuel. Generally, the cracking processor has a volume with 5 stere and one-ton feed. Thus, it usually takes 12 hours to refine once. After the process is completed, it is required to cease for another 12 hours. The open the taphole the bottom of the processor will be opened for dumping the dreg after the processor cools down; the material will be fed from the processor inlet and then enter to next circulation.
      The vertical oil-refining processor using waste tires in China cannot meet environmental protection requirements on its disposal of three wastes during manufacturing; besides, it has a low output and doesn’t have capability to produce continuously. Thus, to fulfill the economic benefits will require more oil-refining processors to work together.
      We have worked jointly with the expert team of Hangzhou Academy of Chemical and Medical Engineering Design to release a series of integrated device extracting carbon black and tire oil from waste tires, after the research of all experts and years of tackling key technological matters, based on the actual situation and national status.
      II. Main features of latest series of devices (take WJ-5 type for example)
      1. Dispose the waste rubber tires comprehensive to produce two products---carbon black and tire oil at the same time
      2.? Each set of device is comprised of ten parts.
            2.1. Pre-treatment device for raw materials
            2.2. Rapid and continuous feeder
            2.3. Integrated rotary cracking device
            2.4. Automatic slaging system with characteristics of safety and environmental protection
            2.5. Whirlwind dedusting device with oil steam
            2.6. Rapid condensation system
            2.7. Exhaust purification, recycle and combustion system
            2.8. Heat source supply system
            2.9. Environmental protection and exhaust system for heat source
            2.10. Central electric control system
      3. Domestic Initiation:
            3.1 This device has rapid, continuous and canned feeding and tapping system, and the maximum feeding capacity reaches to 20 tons per 24 hours. The efficiency is more than three times to the traditional Intermittent Operation Equipment.
            3.2 The matching pressure release device is capable of increasing the value added of oil product to a large degree through deeply processing the oil product.
            3.3 Manufacturing the whole set of device should be carried out in an environment of no smoking and no smell, thus the device having excellent safety and environmental protection property.
            3.4 The split treater of the key equipment for this achievement has a horizontal integrating revolving structure, and comparing this structure with the bygone old equipment, it is found the fuel for the new equipment is fuel oil, and the residue generated in the burning course of fuel oil can fully reach to the exhaust discharge standards of all countries in the world, thus it being able to be used in any countries.
            3.5 High effective fuel gas heat? ing system: when the temperature of the heated gas reaches to 150℃, a large amount of gases----methane to butane---that cannot be fluidified in common temperature and pressure will be generated. And these gases can generate a large amount of heating energy after being burned fully in our specially designed gas burner, thus saving energy to a large degree.
            3.6 The latest technology and the whole split and oil product collecting system developed by the company can be used for this device, and the produced fuel oil has some advantages such as high quality and high oil output rate.
      4. The company’s promise:
      All series of equipments sold by our company can be enjoyed the perfect after-selling service and the free repair service for one year as well as the maintenance service for the whole service life, thus completely resolving the customers’ troubles after buying.
      III. Product and Raw Material Market
      With the rapid advance of the global economy, the demands of rubber market to carbon black become more and more. And among the numerous rubber products, the market price of the cheapest N330 carbon black is 2600 RMB/ton, however, the carbon black produced by our revolving response treater can be the raw material to produce N330 carbon black except being able to be fuel, thus it having a large market demands and a wide prospect.
      Energy source has been the main factor limiting the economic development of each country since the 1990s with the daily increasing trend of petroleum in short supply, the petroleum explored in the whole land of the globe will be exploited out in 15 years! Seeking new energy sources has become the question all countries in the world focus on. China has a broad tract and a large population, and with the rapid development of the market economy and the popularization of vehicles and machinery, the demands to petroleum is increasing continuously and China has changed from a petroleum exporting country to an importing country. In the first half year of 2006, we still need to import 80 million buckets of crude oil from foreign countries to be able to meet the demands of domestic market except the domestically produced crude oil in accordance with the news publicized by China Petroleum & Chemical Corporation. Since 2006, the international price of crude oil increases time and again, and the price of each bucket of crude oil has exceeded 80 dollars (quotation from OPEC in August 2006).
      Then whether the sources of the raw materials for refining oil can be guaranteed?
      At present, China annually output on tire ranks to the third in the world with an output of more than 0.13 billion pieces, and the number of annually brought waste and old tires is more than 65 million pieces and still is increasing with a double-digit speed annually. Therefore, it is not anxious to find raw materials for the one factory in each country to process 65000 pieces of tires annually so as to extract carbon black and tire oil.
      IV. Main Technological Characteristics
      1.This device has rapid, continuous and canned feeding and tapping system, and the maximum feeding capacity reaches to 20 tons per 24 hours. The efficiency is more than three times to the traditional Intermittent Operation Equipment.
      1. The heating method of the new equipment is indirect heating method, and the advantages of this method are as follows:
            ①. When some problems occur in the system, closing the induced draught fan can cut the heating source in sudden to ensure the system’s safety.
            ②. The heat exchange distance is more than that of the old equipment by 5-7 times, thus having a higher thermal efficiency.
            ③. Extend greatly the service life of main equipment, and the service life of the new equipment is longer than that of the old one by 2-3 times.
      2. Equipment’s Shape: beautiful and decent, and economic and practical.
      3. Catalyzing heat split technology and chemical extracting technology for product
      4. The equipped environmental protection fittings are more perfect, such as waste gas burner, and flue dust chamber.
      5. The equipment has reasonable design and advanced manufacturing technologies and a high automation degree and complete safety facilities.
      V. Products and Industries Applicable for Revolving Response Treater
      1. Waste and old rubber tire
      2. Waste industrial mixed plastics, and allow multi-kind flotsams exist at the same time, but PET is an exception.
      3. Waste oils. For example: waste diesel and engine oil, waste engine oil, and waste oil residue, etc.
      4. Waste cable skin (suggests dechlorination treatment first and then oil refining)
      5. Waste crude oil
      6. Regeneration of waste PMMA (polymethyl methacrylate)
      ?XI. Technological Process
      Pretreat and crush waste tires and send them to split processor with no break negative pressure order to catalyze and heat in order to filter out oil steam; oil steam shall pass light and heavy components separation device; light component shall enter the condenser and meanwhile residues shall be discharged automatically in succession. But the liquefied part shall be condensed to rubber oil; and the part that cannot be liquefied shall be input into heating supply system for burning by way of combustion gas purification system.
      Schematic Drawing of Technological Process: (including medium control system)

 

      VII. Security
      The security of main device, the main components of the exhaust gas that cannot be liquefied are alkenes class from C1to C4, whose direct burning is dangerous. Therefore, we shall first make them pass water seal of the first safety device before burning up them as fuels, and further make them pass the gas burner of the second safety device; then the complete safe production shall be realized.
      VIII. Environmental Protection
      Treatment of the three wastes in the course of production.
      1. Exhaust gas
      By means of full combustion in water seal and gas burner of safety devices, the pollution of exhaust gas shall be eliminated and a large amount of fuel shall be saved. Zaoqiang ZTC series desulfurization dust collector shall be used to discharge smoke and dust; the discharge of smoke and dust shall meet related standards of —2001
      2. Waste liquid
      Faintly acid waste water shall produce in the course of treatment of oil products (about 50 kg waste water each ton oil, small volume and tracable); after neutralization by adding faintly alkaline liquor, the neutral waste water shall be harmless with three-grade filtration and be discharged into special evaporation processor to vapor (heat source is the flue residual heat of main processor).
      3. Waste solid
      The residue left from catalysis and split of waste tires is carbon black; there is no waste solid left.