WO2014127600A1 - Method for comprehensive regeneration and utilization of urban household garbage and sludge - Google Patents

Abstract

Disclosed is a method for comprehensive regeneration and utilization of urban household garbage and sludge. The garbage is manually sorted, then transferred into a bag breaking machine to carry out bag breaking treatment. The bag broken garbage is screened in a roller, and the undersize products are subjected to magnetic separation and crushing to obtain crushed undersize products. The oversize products are separated into organic substances, inorganic substances and waste plastic through dry blowing. The inorganic substances are used for preparing building materials after magnetic separation, manual sorting and crushing. The waste plastic is cracked at high temperature to recover crude oil refined to obtain renewable diesel. The organic substances are subjected to magnetic separation, manual sorting and crushing to obtain crushed organic substances. The crushed organic substances, the crushed undersize products and sludge are mixed to obtain sludge mixture which is subjected to dewatering, drying and shaping to obtain charcoal products. Waste gas fuel generated from high-temperature cracking of waste plastics is used as a fuel for drying sludge mixture. Residual carbon black generated from high-temperature cracking of waste plastic is added into the sludge mixture to obtain charcoal products.

Description

 Method for comprehensive recycling of municipal solid waste and sludge

 The invention belongs to a method for treating municipal solid waste, and particularly relates to a method for comprehensive recycling of urban domestic waste and sludge.

Background technique

 In order to protect the living environment and ecological environment of human beings, the treatment of garbage has become more and more important. This year, with the rapid development of the economy, people's material and cultural living standards have improved, and urban domestic garbage has become more serious in both quality and quantity. Variety. In the past, waste was mainly based on food and organic waste. Nowadays, a large amount of paper and waste plastics have been added, and a large proportion of the waste is recyclable. This year, a variety of waste treatment technologies have been developed, including recycling, landfill technology, incineration technology and composting technology. Such as:

 Chinese patent application 03150530. 9 discloses a domestic garbage treatment process. Domestic garbage is divided into organic matter, inorganic matter and waste plastic after crushing and air separation, and inorganic materials are used for making building materials, and waste plastic cups are sent to waste plastics for treatment. System, organic matter is sent to the fertilizer system. At present, the treatment of waste plastics is mostly used for the preparation of regenerative diesel oil by pyrolysis. When waste plastics are cracked at high temperature, waste black, exhaust gas, etc. will be generated, which will cause environmental pollution.

Chinese patent application 200610122822. 2 discloses a municipal solid waste comprehensive office According to the method, the sieved material after sieving is used for fermentation, but the sieved material is not treated well. At present, the treatment method for such undersize is also carried out by landfill. In short, there is a problem of incomplete disposal of waste treatment technology, which leads to re-contamination of the environment.

 In addition, most sewage treatment plants all over the country produce large quantities of sludge every day (here sludge refers to solid, semi-solid and liquid wastes produced by sewage treatment; contains certain organic matter, heavy metals and germs, etc.) The sludge treatment mainly adopts the methods of landfill, fertilization and incineration. Due to the high water content of the sludge (65%-80%) and the poisonous heavy metals, the landfill treatment not only occupies a large amount of land, but also seriously pollutes the groundwater resources; As a fertilizer, it will cause secondary pollution. The safety of agricultural products caused by fertilization and human health events have occurred, and it has become a factor that can not be ignored influencing agricultural production, people's health and social stability.

Summary of the invention

 In order to solve the above technical problems, an object of the present invention is to provide a method for completely processing urban living garbage, without re-contamination, and at the same time capable of driving urban sewage sludge.

 The object of the invention is achieved in this way:

A method for comprehensive recycling of municipal solid waste and sludge, characterized in that: domestic garbage is manually inspected, and large stones, cloth, bamboo, and glass are detected, and then the garbage is sent to a bag breaking machine for bag breaking treatment. The waste after the bag breaking treatment is sieved by a drum, and the sieved material is magnetically selected and pulverized to obtain a crushed sieved object; the sieved matter is divided into organic matter, inorganic matter and waste plastic by air separation, and the inorganic matter is magnetically Selection, manual sorting, crushing, used to make building materials The waste plastic is subjected to pyrolysis, recovery of crude oil, and refining to obtain regenerated diesel; the organic matter is subjected to magnetic separation, manual sorting, and pulverization to obtain pulverized organic matter, pulverized organic matter, and pulverized sieved material. Mixing with sludge to obtain a sludge mixture, the sludge mixture is dehydrated, dried, and shaped into a finished carbon product, and the exhaust gas fuel generated in the process of pyrolyzing waste plastic is used as a fuel for drying the sludge mixture, the high temperature The waste carbon black generated when the waste plastic is cracked is added to the mixture of sludge for preparing the finished carbon product.

 By adopting the above technical scheme, the domestic garbage is comprehensively classified and processed, and the carbon sieve product prepared by the sieve sieve and the organic matter and the sludge are effectively prepared, and the produced carbon can reach a combustion value of 3500-3800. card. At the same time, the waste carbon black produced during the pyrolysis of waste plastics is also used to prepare carbon, which avoids secondary pollution of waste carbon black. At the same time, the waste gas fuel generated during the cracking process is used to dry the sludge, so that the exhaust gas fuel is reused, thereby achieving the purpose of saving energy, and also avoiding environmental pollution of the exhaust gas fuel, achieving zero emission and zero of the project. Pollution.

 In the above technical solution, the sludge has a water content after dewatering in the sewage treatment plant is less than that in the above technical solution, the weight ratio of the crushed organic matter, the crushed sieve material to the sludge is per ton of sludge. Add 0. 4-0. 6 tons of pulverized organic matter and crushed undersize.

 In the above technical solution, the sludge mixture is first dehydrated to a water content of less than 40%, and then dried to a moisture content of 10% to 15%.

In the above technical solution, the inorganic substance is used for making an unfired brick after magnetic separation, manual sorting, and pulverization. Advantageous Effects: The invention comprehensively sorts and regenerates domestic garbage, and simultaneously drives the recycling of urban domestic sludge, avoids secondary pollution, and achieves zero discharge and zero pollution of the project.

DRAWINGS

 Figure 1 is a process flow diagram of the present invention.

detailed description

Example 1 As shown in Fig. 1: The domestic garbage is manually inspected, and large stones, cloth, bamboo, and glass are detected, and then the garbage is sent to the bag breaking machine for bag breaking treatment, and the garbage after the bag breaking treatment is passed through the roller. Screening, sifting the material by magnetic separation, then pulverizing to 0-3mm to obtain the pulverized sieve; metal recovery, the sieve is divided into organic matter, inorganic matter and waste plastic by air separation, the inorganic The object is magnetically selected to recover metal, and then manually sorted out large stones, sticks, etc., and finally pulverized to 0-3 mm for use in making building materials; for example, for making burn-free bricks. The waste plastic is subjected to pyrolysis, recovery of crude oil, refining to produce regenerative diesel for industrial, agricultural or civil fuel; the organic material is subjected to magnetic separation to select metal recovery, and then manually sort out light plastic such as waste plastic bottles. Finally, the pulverized organic matter is obtained by pulverizing to 0-3 mm, and the pulverized organic matter and the pulverized sieved material are mixed with the sludge having a water content of less than 80% after dewatering in a sewage treatment plant to obtain a sludge mixture, and the sludge mixture is obtained. After being dehydrated to a water content of less than 40%, and then dried to a water content of 10% to 15%, and finally formed into a finished carbon product, the carbon product is used for industrial, agricultural or civil alternative coal fuel. The exhaust gas fuel produced during the pyrolysis of waste plastics is used as a fuel for drying the sludge mixture. The waste carbon black produced by the pyrolysis is added to the sludge mixture for preparation of the finished carbon product. The burning value of the produced charcoal Reach a 3,500-3,800 kcal. The weight ratio of the pulverized organic matter, the pulverized undersize to the sludge is 0.4-0.6 tons of pulverized organic matter and the pulverized sieved material per ton of sludge.

Claims

claims 1. A method for the comprehensive recycling of municipal domestic waste and sludge, which is characterized by: the domestic waste is manually sorted to detect large stones, cloth, bamboo, and glass, and then the garbage is sent to a bag breaking machine for crushing Bag treatment, the garbage after the bag breaking treatment is screened by a drum screen, and the undersized materials are magnetically separated and crushed to obtain the crushed undersized materials; the materials in the screen are divided into organic matter, inorganic matter and waste plastic through air separation, and the inorganic matter is divided into organic matter, inorganic matter and waste plastic. The materials are used to make building materials after magnetic separation, manual sorting, and crushing; the waste plastics are processed through high-temperature cracking, crude oil recovery, and refining to obtain regenerated diesel; the organic matter is crushed after magnetic separation, manual sorting, and crushing The crushed organic matter, the crushed organic matter, the crushed undersize and the sludge are mixed to obtain a sludge mixture. The sludge mixture is dehydrated, dried, and molded into finished carbon products. The sludge produced during the high-temperature cracking of waste plastics The waste gas fuel is used as the fuel for drying the sludge mixture, and the waste carbon black produced during the high-temperature cracking of waste plastics is added to the sludge mixture to prepare finished carbon products. 2. The method for comprehensive regeneration and utilization of municipal solid waste and sludge according to claim 1, characterized in that: the sludge is sludge with a moisture content of less than 80% after dehydration in a sewage treatment plant. 3. The method for comprehensive regeneration of municipal solid waste and sludge according to claim 2, characterized in that: the weight ratio of the crushed organic matter, the crushed undersize and the sludge is 0.01% per ton of sludge. 0. 4-0. 6 tons of crushed organic matter and crushed sieve 4. The method for comprehensive regeneration of municipal solid waste and sludge according to claim 1 or 2 or 3, characterized in that: the sludge mixture is first dehydrated to a water content of less than 40%, Then dry it until the moisture content is 10%-15%. 5. The method for comprehensive regeneration and utilization of municipal solid waste and sludge according to claim 1, characterized in that: the inorganic materials are used for making non-burning bricks after being magnetically separated, manually sorted, and crushed.