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Refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation

A technology of waste incineration and waste incinerator, which is applied in the field of waste incineration system with flue gas deacidification and retardation of dioxin generation, can solve the problems that have not been popularized and applied in a large range, and there is no mature and reliable process, personal injury, etc. Health hazards and other problems, to achieve the effect of reducing dioxin emissions, reducing the amount of deacidification agent, and reducing the amount of renovation projects

Inactive Publication Date: 2012-10-31
BEIJING CHINA SCI GENERAL ENERGY & ENVIRONMENT CO LTD
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Problems solved by technology

If the discharge of dioxin-like substances from waste incineration facilities cannot be effectively controlled and treated, it will bring great damage to the natural environment and cause great harm to human health.
[0006] In addition, there are technologies to control the discharge of dioxins by installing metal catalyst degradation and ultraviolet photodegradation of PCDD / Fs devices at the tail, but they have not been widely used at present, and there is no mature and reliable process available for implementation.
Moreover, the composition of the garbage is extremely complex and unstable, and the incineration products contain a large amount of substances that can poison the catalyst. Whether metal catalysts and ultraviolet light degradation can be applied remains to be verified.
In addition, metal catalyst degradation and ultraviolet light degradation of PCDD / Fs technologies only target the part distributed in the gas phase, and have no effect on the digestion of PCDD / Fs adsorbed in fly ash

Method used

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  • Refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation
  • Refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation
  • Refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The mechanism of dioxin emission from waste incineration:

[0027] There are two reasons for the presence of dioxin-like substances in waste incineration emissions: one is that the dioxin-like substances mixed in the waste are not completely oxidized and decomposed during the incineration process, and the other is that the dioxin-like substances produced during the waste incineration process Evils. According to current research at home and abroad, there are three main mechanisms for the formation of dioxins during waste incineration:

[0028] (1) High temperature gas phase generation.

[0029] After the garbage enters the incinerator and starts to burn after drying and preheating, some garbage (large pieces) may be in a l...

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Abstract

The invention discloses a refuse burning system and method with functions of deacidifying flue gas and retarding dioxin generation. The system of the invention comprises an exhaust-heat boiler, a flue gas cleaning device, a calcium base retardant adding device, a flue gas pre-humidifying device and a control device, wherein the flue gas pre-humidifying device is arranged between the exhaust-heat boiler and the flue gas cleaning device; the retardant adding device is used for adding calcium base retardant to the refuse burning system; and the calcium base retardant adding device, the flue gas pre-humidifying device and the flue gas cleaning device are respectively connected with the control device. The invention can simultaneously reduce the emission of dioxin materials and acidic gas, andis suitable for various solid waste burning systems.

Description

technical field [0001] The invention relates to the technical field of garbage incineration, and in particular to a garbage incineration system and method capable of deacidifying flue gas and retarding the generation of dioxins. Background technique [0002] Incineration treatment of solid waste such as household garbage has the advantages of complete harmlessness, high reduction, and high utilization rate of resource (heat recovery), and is one of the technologies that best embodies the three principles of waste treatment. It has been widely used in developed countries and regions such as Europe, America and Japan. Since the end of the 1990s, waste incineration technology has also developed rapidly in my country, and large and medium-sized cities have built waste incineration (power generation, heating) plants one after another. It will increase by a large margin, and the proportion of domestic waste and other solid waste treated by incineration will also increase year by y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G5/00F23G5/30F23G5/44F23G5/50B01D53/81B01D53/72B01D53/40
Inventor 姜鸿安辛博栗明
Owner BEIJING CHINA SCI GENERAL ENERGY & ENVIRONMENT CO LTD
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