Actively establish a long-term mechanism for cement kiln collaborative disposal of solid waste

Date: 2019-08-16 Views:

With the increasing production of various kinds of waste, the drawbacks of the traditional landfill method have been revealed, and now it is gradually replaced by the waste incineration power generation method.At the same time, in view of the advantages of high temperature calcining of cement kilns, the use of cement kilns to coordinate the disposal of solid waste has become another new way of waste incineration, which is favored in the industry.
 

1. Basic mature policies of the industry provide support


As a new method of waste disposal proposed by cement industry, the cooperative disposal of solid waste by cement kiln means that solid waste which meets or meets the requirements of kiln after pretreatment is put into cement kiln to realize harmless disposal of solid waste while producing cement clinker.It can not only realize the reduction and recycling of solid waste, but also promote the development of cement industry to green environmental protection industry.

In China, the use of cement kiln co-disposal of waste was first started in Beijing cement factory in 1995.At present, the overall situation, in the technology, equipment, standards, pollution control levels and other aspects have been basically mature and perfect, with the conditions for popularization and application.

In recent years, the state has issued a series of support policies.In May 2014, the national development and reform commission, together with the ministry of environmental protection and other seven ministries and commissions, issued the opinions on promoting collaborative resource treatment of urban and industrial waste in the production process, which fully affirmed the significance of cement kiln incineration.In 2015, the ministry of industry and information technology after arduous work, finally the combination of housing and urban-rural development, development and reform commission, ministry of environmental protection and so on six ministries jointly issued "on to cement kiln for coordination of the pilot living garbage notice, then jointly issued a cement kiln collaborative disposal of domestic waste list of pilot enterprises;In October 2016, the ministry of industry and information technology issued the building materials industry development plan (2016-2020), which explicitly proposed to support the collaborative disposal of household waste, municipal sludge, contaminated soil and hazardous waste by existing new dry cement kilns, and listed them in key promotion projects.In May 2017, the guidelines for the review of the operating license for the cooperative disposal of hazardous waste in cement kilns (trial) was also officially released.The national conference on industry and information technology held in 2018 also clearly pointed out that cement kilns should be promoted to jointly dispose of municipal waste and industrial waste and strive to improve the level of green development.

In addition, the ministry of housing and urban-rural development has included "the use of cement kilns to coordinate the disposal of household waste" in the 13th five-year plan for municipal infrastructure construction, and called for pilot projects such as cement kilns to be carried out in qualified areas.

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2. Establish and improve long-term mechanism to help green development of the industry


Strong policy support provides development soil for cement kiln collaborative disposal of solid waste.In recent years, joint disposal projects of cement kilns around the country have been frequently implemented.Conch, huaxin, jinyu, shaanxi coal and other traditional cement manufacturers have been involved in solid waste disposal, using cement kilns to coordinate the disposal of household waste.

Compared with the traditional waste treatment method, cement kiln collaborative treatment of solid waste technology has prominent advantages: the process is relatively simple, ultra-low emissions, water is evaporated, waste gas into the cement plant purification system, ash residue into cement products, one-stop terminal treatment is more convenient than ordinary waste power plant;Can use existing industrial facilities, do not increase land, environmental disturbance is small, construction investment is relatively small;Cement kiln has high temperature calcining and strong alkaline atmosphere, and can effectively inhibit the generation of secondary pollutants.

However, the use of cement kiln coordinated disposal of solid waste although obvious advantages, but not universal solid waste disposal plant.Its processing process has strong selectivity and pertinence, if not properly handled, will bring unexpected safety and quality problems.In addition, cement plant scale, existing technology, processing costs are factors restricting its development.

As a matter of fact, the collaborative disposal of solid waste in cement kilns is a systematic project. Only by starting from all involved links, continuous innovation and active implementation, can the efficient and orderly development of the whole system project be promoted.Relevant governments, associations, research institutes and enterprises should assist each other, strengthen overall planning, make full use of digital, networking, intelligent and other means to carry out intelligent manufacturing transformation of the whole process of collaborative disposal;We will actively improve the relevant policy system, study and promulgate industrial, fiscal, tax and financial support policies, improve the standard system for coordinated disposal, and establish a sound long-term development mechanism to facilitate the green and circular development of the cement industry.

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