System and method for combined treatment and utilization of various solid wastes

Abstract

A system for combined treatment and utilization of various solid wastes comprises a solid waste storage module (1), a sorting and crushing module (2), a drying and incineration module (3), a resource utilization module (4), a curing agent configuration module (5) and a harmless landfill module (6). A material outlet of the drying incineration module (3) is respectively connected with a material inlet of the resource utilization module (4) and a material inlet of the harmless landfill module (6) through a second conveying device; and a material outlet of the curing agent configuration module (5) is connected with a material inlet of the resource utilization module (4) through a third conveying device. The system overcomes the limitation of single technical treatment in material balance and energy balance, fully utilizes the synergistic effect of components in various solid wastes, and has the characteristics of multiple types, low energy consumption and high efficiency. The invention also discloses a method for combined treatment and utilization of various solid wastes.

Description

technical field [0001] The invention relates to technical fields such as environmental protection, energy, and chemical industry, and more specifically relates to a system and method for joint disposal and utilization of various solid wastes. Background technique [0002] There are many kinds of solid waste, such as domestic garbage, biomass, general industrial solid waste, hazardous waste, construction waste, polluted soil, etc. are solid waste. According to different classification standards, general industrial solid waste can be further subdivided. According to environmental protection statistical standards, it can be divided into 10 categories such as smelting waste residue, tailings, sludge, red mud, phosphogypsum, desulfurized gypsum, and fly ash. [0003] Among the many solid wastes, domestic waste incineration, biomass blending and other processes are relatively mature, and have been used industrially in my country for many years. However, the disposal of general in...

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Problems solved by technology

[0004] General industrial solid waste, construction waste and polluted soil also have relatively feasible treatment and disposal technologies, but they all have the disadvantages of insufficient coordination and high cost of separate disposal

For example, steel slag and smelting waste slag in general industrial solid waste can be ground and blended into cement kilns for calcination, but the amount of blending is small and the disposal capacity is limited; municipal sludge can be dried and then burned or incinerated independently, but due to The characteristics of its high moisture content (generally the factory moisture content is as high as 80%) lead to the addition of a large amount of biomass or natural gas as auxiliary fuel when it is incinerated; in addition to concrete components, construction waste also contains a large amount of light substances (such as wood, packaging, fabrics, etc.) etc.), after sorting, the concrete blocks can be crushed and reused, but their light substances are still difficult to dispose of, and they are often sent to other incineration plants to be incinerated for a fee, and the cost is high; polluted soil contains some heavy metals, and high-temperature firing of building materials can reduce Heavy metals are solidified, but the contaminated soil cannot be calcined independently to form building materials such as ceramsite and ceramics, and it needs to be calcined together with steel slag, fly ash and other substances

[0005] To sum up, the disposal of solid waste such as general industrial solid waste, construction waste, and polluted soil by a single technology has great limitations, and its material balance and energy balance are often insufficient, which eventually leads to problems such as high disposal costs and insufficient resource utilization.

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