Latest Municipal Waste Recycling Line
1. The background and significance of the development of domestic garbage disposal projects
Domestic garbage refers to solid waste generated in activities that are provided in daily life or for daily life, as well as solid waste that is regarded as domestic garbage by laws and administrative regulations. Urban domestic waste disposal is an important part of urban environmental sanitation. It directly serves the creation of a clean, beautiful and comfortable environment, which is beneficial to people's physical and mental health, urban economic development and spiritual civilization construction. It is also environmental protection and social sustainability. Important content of development.
With the improvement of people's living standards, environmental awareness has gradually increased, and the requirements for the harmless treatment of domestic garbage have become stricter. Before 1990, the national municipal solid waste treatment rate was less than 2%. With the development of the economy, the level of urban domestic waste treatment continued to increase. In 1994, there were 99.52 million tons of municipal solid waste in the country, and there were 609 urban domestic garbage treatment plants (fields). The urban domestic garbage disposal rate was 35.8%. In 2000, there were 118 million tons of municipal solid waste in the country, and there were 660 domestic garbage treatment plants (fields). The garbage disposal capacity reached 232,200 tons/day, and the harmless treatment rate of domestic garbage reached 60.23%. During the period from 1986 to 2000, the average annual growth rate of urban domestic garbage removal was 6.5%, and the growth of urban domestic waste was basically synchronized with urban population growth. Among them, 95% of urban domestic waste was land-filled.
In recent years, the achievements and progress in the treatment of municipal solid waste in China are obvious, especially the advanced waste treatment technology has gradually been applied. For example, in many landfills recently built, in order to improve the anti-seepage level of domestic waste landfills, high-density polyethylene film is used as anti-seepage material for horizontal anti-seepage; to improve the efficiency of landfill operations, some large-scale The landfill uses a dedicated garbage compactor, and so on.
Wtih continuous efforts, Shangqiu Zhongqing Company has developed a cracking equipment specially designed for the treatment of domestic garbage. After being processed by the equipment, it can obtain about 20% of oil profit from domestic garbage, and in the process of treatment, the domestic garbage is sterilized after high temperature to ensure environmental protection and health. Before introducing our processing equipment, we will analyze the current common treatment methods.
2. Common treatment methods for domestic garbage
2.1-Landfill treatment
Landfill is an effective method for massaging urban domestic waste, and it is also the final treatment method for all waste treatment process residues. At present, direct landfill method is widely used in China. The so-called direct landfill method is to fill the prepared pits with compacted materials to make biological, physical and chemical changes, and to decompose organic matter to achieve the purpose of reduction and harmlessness. Most of the garbage in many cities in China is still open-air stacked without any protective measures. Every garbage dump has become a source of pollution. Mosquitoes are breeding, mice are plagued, and odors are raging. A large amount of waste water seeps into the ground from the surface, causing serious pollution to the urban environment and groundwater sources. Shenyang City once drilled and sampled 10 of the 35 landfills to analyze the waste fault samples and groundwater quality. The analysis found that:
a. The groundwater quality deteriorated, the pollution was serious, the water was turbid and smelly, and the anaerobic large intestine was detected in the water. Bacillus;
b. toxic and harmful substances were detected in the waste fault samples. Every day, 10,000 tons of garbage is transported to the seaside in the suburbs of Shanghai. A garbage mountain with a height of 20 to 30 meters rises and rises, causing serious pollution to the surrounding environment. The landfill treatment method is one of the most common waste treatment methods. Its biggest feature is low treatment cost and simple method, but it is easy to cause secondary pollution of groundwater resources. As the amount of urban waste increases, the number of suitable landfill sites close to the city is becoming less and less. Opening up long-distance landfill sites has greatly increased the cost of garbage discharge, which is unaffordable.
2.2-Incineration treatment
There are two common types of incineration methods, one is open burning. As shown in FIG. There is no cost to this method. In the vast rural areas or in slightly remote places, even large-scale garbage dumping sites have many methods of using such open burning. However, the pollution is particularly serious, and the cost of plastic in the garbage will also generate a large amount of dioxins when burned in the open air, which seriously affects human health. Moreover, it will cause great damage to the land at the accumulation site when incinerated.
Another application that is increasingly used is to place waste in a high-temperature furnace, a method in which the combustible components are fully oxidized, and the heat generated is used for power generation and heating. The advantage of incineration treatment is that the reduction effect is good (the residue volume after incineration is reduced by more than 90%, the weight is reduced by more than 80%), and the treatment is thorough. However, the construction and production costs of incineration plants are extremely expensive. In most cases, the value of the electrical energy generated by these equipments is much lower than the expected sales, leaving the local government with huge economic losses. Since the garbage contains certain metals, incineration is highly toxic and causes secondary environmental hazards. Incineration requires that the calorific value of the waste be greater than 3.35 MJ/kg. Otherwise, a combustion improver must be added, which will increase the operating cost to an unacceptable level in the general city.
2.3-Composting treatment
The domestic garbage is piled up in piles, stored at 70 ° C for storage and fermentation, and the organic matter is decomposed into inorganic nutrients by the ability of microorganisms to be decomposed in the garbage. After composting, the domestic garbage becomes a hygienic, tasteless humus. It not only solves the way out of garbage, but also achieves the goal of re-recycling. However, the amount of compost is large and the nutrient content is low. The long-term use is likely to cause soil compaction and groundwater quality deterioration. Therefore, the scale of composting is not too large. Regardless of landfill, incineration or composting of municipal solid waste, pretreatment must be carried out. The most common process of pretreatment is garbage crushing. The garbage is crushed, the volume can be reduced for landfill, the burning can be made more complete, and the compost can make the garbage more quickly. However, the composting treatment cycle is long and covers a large area. It is necessary to classify the garbage in advance and pre-separate the indecomposable components: rubber, metal, glass, and the like.
2.4- Sorting method
Separation pretreatment is one of the fastest rising methods in current application selection. Domestic waste can be sorted to obtain different substances. Plastics, metals, glass, etc. are recycled. Other non-recyclable parts are filled in or other. deal with. However, this sorting equipment has high production costs, higher operating and maintenance costs, and a large footprint. Since the mechanical parts and motors of the sorting equipment are many, and the domestic garbage is corrosive, the equipment is easily damaged or the failure rate is high during the sorting process. Therefore, the sorting project requires that all sorting equipment be used in one preparation to prevent accumulation of equipment failure. However, in the sorting process, it is inevitable that there will be bad smells and overflowing, which will bring pollution to the surrounding environment.
One sorting method uses water sorting, but the water consumption is large, and the corrosion rate of mechanical parts in the water is greatly increased.
2.5: the treatment we choose is just to compressing to remove water, and then pyrolysis into oil, fertilizer base and other solid waste.
Compressing and Packaging integrated Machine
Function: squeeze out most of the water in the household garbage,
Reduced and packaged into blocks for later cracking
Save energy and facilitate large feeds.
Coverage: 8 m* 9 m
Finished product size: 1 meter * 1 meter * 1 meter block
Rated power: 22Kwh.
Composition: conveyor belt, extruder, baler
3. The national policy of domestic waste disposal
According to national requirements, the proportion of urban domestic waste resource utilization will reach 30% in 2015, and the municipalities and provincial capital cities and planned cities will reach the target of 50%. By 2030, the domestic garbage collection and disposal targets will be fully implemented. This requires the full promotion of all parties. In particular, as urban domestic waste treatment facilities and services extend to small towns and villages, it is particularly necessary to further improve laws and regulations so that the problem of solving garbage can be promoted in an orderly manner and promote the healthy development of the municipal solid waste treatment industry.
At present, there are still many problems with the laws and regulations on the disposal of domestic garbage. In terms of resource utilization, the guiding ideology of past legislation is biased. In the past, domestic waste was often treated as a solid waste in the classification of domestic waste. In fact, there are many ingredients that can be comprehensively used in domestic garbage. The Law on the Prevention and Control of Environmental Pollution by Solid Waste focuses on pollution prevention and end treatment, and fails to encourage the comprehensive utilization of domestic waste from the legal level.
In addition, there are many general expressions in the content of current laws and regulations, and the operability is not strong. The current laws and regulations have many regulations on the treatment of municipal solid waste, and there are few regulations on the treatment of rural domestic waste; there are many activities related to the cleaning, collection, transportation, disposal and management of domestic garbage, and there are few classifications for waste. For more information on the latest waste processor industry policy, please refer to the "13th Five-Year Waste Processor Industry Research and Industry Strategic Planning Analysis Report" published in the China Report Hall.
Therefore, it is recommended to consider the development of comprehensive laws such as the Waste Restriction Treatment Act at the national level. The second is to formulate supporting regulations and corresponding implementation rules, such as the "Container Packaging Recycling Law" and "Food Recycling Law", to make detailed provisions on the recycling of different objects. The third is to introduce the economic policy of domestic garbage disposal, and clearly use various economic means to promote the development of industrialization of domestic waste treatment.
4: Pyrolysis Process (semi-continuous) - autoloading at high temperature, discharging at high temperature
4.1-Pyrolysis Introduction
- Function: Extracting the fuel gas from the packaged garbage, partially storing as fuel oil, partially purifying and recovering the non-condensable gas, and then serving as fuel for the whole equipment;
- Power: 22KWH
- Single processing capacity: about 20 tons;
- Operating area: 15 meters * 25 meters, the height of the plant requires not less than 6.5 meters;
- Main components: cracking main furnace, gas distribution package, condenser, storage tube, flue purification, etc.
4.2-The pyrolysis Process Introduction:
- General introduction: The sorted combustible materials including but not limited the plastic, the rubber, etc. will be packed into bundles, and feed into reactor directly, then close tightly the reactor door, The feeding totally take about 1~3hours accordingly.
- Then begin heating. The first 1.6~2.1hours can be called as pre-heating period, and the auxiliary fuel (can be fuel oil, gas or wood) is necessary.
- When the gas separator temperature rise up to about 100°C, the oil gas will generate and flow through the gas separator. The heavier content falls down and pushed back to reactor again, the light oil gas part goes up to the condensers and turned into liquid oil stored in oil tanks. The uncondensed sync gas will be purified to remove acid part and the odor, then back to furnace burned as fuel to heat reactor.
- Together with temperature rises up, then sync gas will take place of auxiliary fuel gradually till completely replace auxiliary fuel. The whole heating process taking about 10hours (according to experience, usually 1Mt tire will take about 1.1hours heating time).
- When all oil cracked out, stop heating and cool down the reactor to about 80°C, then open the discharger, begin discharging carbon black.
- Sync Gas:The sync gas generated about 3~8% totally according to the water content of tires, it is pollution gas, but with huge heating value, cannot be emitted directly. We adopt gas purification and recycling technology, all such gas will be purified first to remove the Sulphur and Chlorine content, and then recycled to the burning room burned as fuel to save operation cost as well as prevent gas pollution. If buyer need, also can collected and pressed such gas into tank to generate electricity or sold to market.
- The principle we use is low temperature pyrolysis, the normal operation temperature not more than 420ºC, and the pressure in the whole process is not higher than 0.02 MPa. We also use smoke purifying system, after purifying, the emissions is cleaner, which is more environment friendly. In a word, our machines are safe, energy-saving, environment friendly and easy to operate.
- Due to the pyrolysis process is completely closed, so the cracking process is anaerobic, rubber and plastic will not produce harmful gases such as dioxins during the pyrolysis process.
If you are intereasted in our machinery and the green solution, please contact
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