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Waste incinerator fly ash disposal solution

Number of visits: Date:8/1/2016

  "Our country has run 231 incinerators in less than 40% of the total number of national key monitoring enterprise, public information platform of monitoring information by enterprises themselves poor performance." Recently released "231 life incinerators information public and pollutant emission report for waste incineration questions once again become a focus of recent. The report pointed out that the incinerator pollutant emission is common behavior.

  Various pollutants in waste incineration, fly ash as may contain dioxins can be water leaching is a high concentration of Cd (Cr), Pb (lead), Cu (Cu), zinc (Zn) and Cr (Cd), Hg (mercury) and salt and other harmful heavy metal material, is considered to be waste incineration needs to be focused on during the operation of the object. With waste incineration project horse, fly ash handling problems also need to be solved.

  Problem a: produce and asymmetric, given concerns

  As of April 2015, the preparation and signing, under construction and has been put into production in our country the garbage FenShaoChang total planning process nearly 467000 tons of garbage a day, a total of 171 million tonnes per year, 112.11 million tons a year than the 12th five-year plan had expected exceeded more than 50%. It is reported that in 2014 the country's 2014 city urban living garbage QingYunLiang 179 million tons, if data regardless of the city, as of May 2015, the national planning burning ratio has reached 95.8% (1.71/1.79).

  Accompanied by increasing waste incineration project, amount of fly ash is also growing. Last year, according to statistics, capacity of 68.11 million tons of garbage burned GESEP, amount of fly ash has been as high as 3.95 million tons. , director of the ministry of environmental health engineering technology research center, wen-long xu pointed out that our country of waste incineration fly ash discharge capacity and serious, there are at least 50% of fly ash has not been disposed of properly. Fly ash has become a living garbage incineration process of pollution control and risk management is the most weak link.

  Inner Mongolia is tang Wei Xiuling environmental protection industry co., LTD., general manager, said: "the municipal solid waste incineration technology in China is still on the stage of grope and the accumulation of experience, for the state of innoxious disposal of incineration fly ash has not been enough attention, lack of independent intellectual property rights with its national conditions, the fly ash disposal technology and equipment." At present, the cured into waste landfill and sanitary landfill stabilization after is two kinds of processing technology is widely used. But waste landfill capacity for only about 50% of the amount of fly ash, the sanitary landfill has just built around 50% in the seams. Therefore, properly handling of fly ash, waste landfill and sanitary landfill in the future will be limited. Production and processing capacity of the fly ash treatment in six to one is one of the difficulties.

  Problem two: cost problem is outstanding, processing

  Discharge of waste incineration fly ash in to swell, but according to the survey, only a handful of cities in our country is in the process of MSW fly ash. Why such a large amount of nobody tube? On the one hand, because the market is not standard, regulation does not reach the designated position, has the problem of vicious competition; On the other hand is high processing cost.

  According to the priority of fly ash, waste incineration supervision, according to a report on the international garbage incineration is extremely expensive, high cost to ensure the burning process of pollution control. Garbage disposal cost per ton, the world bank in 2005, the average data is given $150 (RMB 1041.66), the Netherlands is 160 euros (1184 yuan), Germany is 200 euros (1480 yuan), and the living garbage incineration in China won the bid price is generally 60 yuan to 80 yuan per ton. And offer garbage incineration in China in recent years has been falling, in June 2015 xintai garbage burning power projects reported 48 yuan/ton, followed by waste incineration field won the bid prices continued to decline.

  In August 2015, bengbu living garbage incineration power generation project 26.8 yuan/ton, in October 2015, jiangsu gaoyou living garbage incineration power generation project 26.5 yuan/ton, zhejiang shaoxing project in December 2015 with 18 yuan/ton quotation again break the bottom line. Only a few months time, the bid the lowest price from 48 yuan/ton dropped to 18 yuan/ton, down 62%. Such a low processing cost, it is the pollution control of the waste incineration effect.

  The fly ash treatment in "the biggest problem is that most incinerators are not for fly ash disposal to set aside special processing costs, lead to treatment difference is very big." East Shanghai trade co., LTD., marketing manager of prosthodontic cao said the basic only look at the current sales price, a lot of poisonous and harmful volatile or treatment effect is very poor, not lasting agents are in sales, market is disordered. And the above relationship between the low bid price and incinerator is great, most of the incinerators bid don't consider fly ash handling budgets, the same is true of the local government.

  One sound environment in tianjin science and technology co., LTD., chairman of JiTao also said that fly ash processing market is the main problem is the good market mechanism has not yet formed. MSW project and bidding stage, especially in the way of fly ash and real costs often enough good, project to undertake the project units to get burned at blindly down the garbage, the local government and from the actual low bid, the fly ash, leachate and waste incineration secondary pollution governance lack the necessary economic foundation. He stressed that at present, most of the garbage power plant fly ash simple source of curing stabilization landfill costs are a problem, let alone a relatively high resource utilization.

  "Much starker choices-and graver consequences-in" period, the amount of waste incineration will continue to grow, fly ash quantity will increase, E20 institute believes that the environmental protection standard progressively tighter against the background of domestic waste incineration power plant flue gas treatment standard or subsequently tighter, under the current technology, fly ash handling cost will be increased accordingly. How to break through the low cost and efficient fly ash processing technology, will become the focus of future development, the research in this field.

  Problem three: regulatory disconnect, need policy to fill

  Last year there is a non-governmental organization says "121 incinerators refused to fly ash". Monitoring, supervision and couldn't keep up with, is no management. , JiTao also points out that the actual processing effect of fly ash and effective supervision and control of disconnect problem is also one of the main confusion now fly ash processing enterprises.

  For processing of MSW fly ash, policy support and attention is necessary, in the recently released "the national hazardous waste list" (2016 edition) explicitly, by landfill of MSW fly ash and cement kiln coordination treatment methods, the exemption according to the regulations. China environmental science research institute of solid waste pollution control technology research institute britain-based authority said the exemption list was part of the exemptions for certain parts of hazardous waste management requirements, such as landfill before, when receiving fly ash landfill waste disposal relevant licence is required, in this file, equivalent to the landfill to waive a certificate formalities, enhances the enterprise the enthusiasm of fly ash processing. Due to the exemption conditions of fly ash disposal facilities set up, in fact the whereabouts and control. Due to handling and processing standards were also made specific provision, in fact, the environmental impact of fly ash has very good control.

  The New Deal, also caused widespread concern in the industry and discussed. JiTao believes that policies for fly ash melting technologies to reduce the threshold, is bound to increase cement enterprises to participate in the enthusiasm of fly ash treatment market, make the market competition more fully. But there are also concerns, prosthodontic is pointed out that there is no relevant detailed rules, there may be a large number of illegal disposal of gaming companies.

  Four seasons fire refractory think, if the list to fly ash disposal link regulation strength degradation, pollution enterprises admittance threshold is reduced, fly ash handling market expanding. Enterprise can use the existing technology for comprehensive utilization of fly ash, reduce the fly ash. But the country has not yet been issued to its processing standards, can't can depend on, needs to be a national technical standards. JiTao also said that the key to the smooth implementation of the New Deal also is to form a complete set of regulatory measures to follow up and put in place.

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