CN1329950A - Process for comprehensive utilization of life garbage in urban area - Google Patents

Abstract

A process for comprehensive utilization of life garbage in city features that the combustibles substances separated from the life garbage can be made into solid particles, which are then delivered along with fuel coal into the fluidized-bed boiler of power plant for generating steam used for electric generation. Its advantages include simple process, less investment and no secondary pollution.

Description

The method of comprehensive utilization of domestic waste

Technical field

The present invention relates to the domestic waste comprehensive utilization technique, more particularly, is a kind of solid-fuelled manufacture method that contains the municipal wastes combustiblematerials.

Background technology

As everyone knows, modern humans's mode of life is not only consumed resource and energy in a large number, and also will discharge a large amount of solid waste every day and comprise domestic refuse, environment is caused seriously influence.Processing for domestic refuse; old treatment process is to adopt landfill and burning; landfill will account for a large amount of soils, and the developed country that has is because of seeking the more and more difficult crisis that causes municipal solid wastes to handle in solid waste landfill place: burning can produce high heat damage incinerator again and discharge obnoxious flavour and be difficult to handle.In order to solve municipal solid wastes, many effective solution are being studied and proposed in each state all.For example publication number acts as a fuel for the CN87102011A patent application proposes to form the rubbish coal by rubbish, coal, earth, lime, wood chip, iron rust slag, sodium bicarbonate, SODIUMNITRATE, the potassium permanganate of fermentation.

The objective of the invention is to propose a kind of solid-fuelled life refuse processing method of making the rubbish combustiblematerials and being used to generate electricity.

Main technical schemes of the present invention; Combustiblematerials in the domestic waste and fire coal are entered circular fluid bed by the different feeds mouth respectively by a certain percentage, the steam pushing turbine generating of generation.

The treatment process of domestic waste of the present invention may further comprise the steps:

(1) noncombustibles that comprises metal, glass in the domestic refuse is chosen recycling by magnetic method or air separating method that oneself knows, filter out and comprise that the combustiblematerials rubbish that contains organic matter rubbish, plastics, packing material, waste paper, the calorific value of this combustiblematerials rubbish are 2500-3000 kilocalorie/kilogram;

(2) the combustiblematerials rubbish to step (1) carries out fragmentation, drying, makes the rubbish solid particulate that particle diameter is 1-2cm by tablets press then;

(3) the rubbish solid particulate that step (2) is made enters the power station burning in circulating fluid bed boiler with coal dust or coal grain by different opening for feeds, produce the generating of steam pushing turbine, described rubbish solid particulate and coal dust or coal grain feed weight are than being 70-80: 20-30, and the best is 80: 20;

(4) flue gas that produces of step (3) boiler combustion purifying treatment according to a conventional method enters atmosphere after reaching emission standard.

The isolated noncombustibles of step (1) mixes after removing metal, glass, is used to make the material of construction that comprises terron, paving brick.

Tablets press of the present invention, circular fluid bed all are known devices.

Advantage of the present invention:

The present invention compares with prior art such as CN87102011A, treatment process is simple, used equipment all is known, the more important thing is and make the domestic refuse of contaminate environment obtain reasonable use, evidence, combustiblematerials in the domestic refuse can be used for generating fully with coal-fired the mixing, and do not need prior hybrid process, only needing that it is entered boiler respectively gets final product, when adding the fire coal that calorific value is 5500 kilocalories/more than the kilogram, this moment, the calorific value of compound can reach 2500 kilocalories/more than the kilogram, but so method save energy of the present invention, non-secondary pollution.In sum, method of the present invention is simple, reduced investment, and recoverable investment in 5 years after the technology popularization, therefore technology of the present invention has bigger social benefit and economic benefit.

The specific embodiment

Further specify characteristics of the present invention below by concrete example:

Example 1-2

Combustible rubbish and the coal dust weight ratio of example 1-2 see Table 1. Concrete preparation process:

With the fragmentation of rubbish combustible, the drying that filters out, make the rubbish that particle diameter is 1-2cm through comminutor The rubbish solid particle enters the ciculation fluidized of power plant with itself and coal dust by two different feeds mouths then Bed boiler burning, the Steam Actuation steam turbine power generation of generation enters big after the gas cleaning of boiler is processed Gas. The coal dust calorific value of described example 1-2 is 5500 kilocalorie/kilograms.

Table 1

Example	Rubbish combustible and coal dust weight ratio	Calorific value, kilocalorie/kilogram
			1	72∶28	3556
2	80∶20	3340

Claims (2)

1. domestic waste method of comprehensive utilization is characterized in that may further comprise the steps:

(1) noncombustibles that comprises metal, glass in the domestic refuse is chosen recycling, filters out and comprise the combustiblematerials rubbish that contains organic matter rubbish, plastics, packing material, waste paper,

(2) the combustiblematerials rubbish to step (1) carries out fragmentation, drying, makes the rubbish solid particulate that particle diameter is 1-2cm by tablets press then,

(3) the rubbish solid particulate that step (2) is made enters the power station burning in circulating fluid bed boiler with coal dust or coal grain by different opening for feeds, produce the generating of steam pushing turbine, described rubbish solid particulate and coal dust or coal grain feed weight are than being 70-80: 20-30

(4) flue gas that produces of step (3) boiler combustion purifying treatment according to a conventional method enters atmosphere after reaching emission standard.

2. in accordance with the method for claim 1, it is characterized in that the described rubbish solid particulate of step (3) and coal dust or coal grain feed weight ratio are 80: 20.