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A method for preparing sintered bricks from domestic waste

A technology for domestic waste and sintered bricks, applied in the field of sintered brick processing, can solve problems such as waste of resources, and achieve the effects of energy saving, good thermal insulation performance, and high waste recycling rate

Active Publication Date: 2016-01-20
XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the recycling of domestic domestic waste is mainly used for power generation and incineration, which will cause a great waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method that present embodiment utilizes house refuse to prepare sintered brick comprises the following steps:

[0022] Step 1. Sorting the household garbage, removing the heavy metal garbage and plastic garbage, and then performing dry-wet separation on the household garbage after removing the heavy metal garbage and plastic garbage, to obtain dry garbage and wet garbage;

[0023] Step 2, removing the incombustibles from the dry garbage described in step 1, and then transporting the dry garbage after the incombustibles have been removed to a pyrolysis gasifier for pyrolysis and gasification to obtain pyrolysis gas and pyrolysis slag;

[0024] Step 3. Transport the wet garbage described in step 1 to a fermenter for anaerobic fermentation for 48 hours to obtain fermented product and biogas, add flocculant to the fermented product, stir evenly, take sediment after standing for stratification, and then Dehydrating the sediment to obtain biogas residue; the amount of the...

Embodiment 2

[0031] This embodiment is the same as Embodiment 1, except that the ingredients are one, two, three, five or six of clay, bentonite, shale, silica sand, fly ash and coal gangue , or a mixture of three of coal gangue, shale, silica sand and clay with one of bentonite and fly ash, or a mixture of two of coal gangue, shale, silica sand and clay with bentonite and fly ash mixture.

[0032] The sintered brick prepared in this example has a microporosity of 16% to 19%, a thermal conductivity of 0.2W / m·K to 0.23W / m·K, and a compressive strength of 8MPa to 10MPa, which can be used for the enclosure of energy-saving buildings In the structure, it can meet the requirement of building energy saving of 65% or the requirement of load-bearing building structure, and has very good economic benefits.

Embodiment 3

[0034] The method that present embodiment utilizes house refuse to prepare sintered brick comprises the following steps:

[0035] Step 1. Sorting the household garbage, removing the heavy metal garbage and plastic garbage, and then performing dry-wet separation on the household garbage after removing the heavy metal garbage and plastic garbage, to obtain dry garbage and wet garbage;

[0036] Step 2, removing the incombustibles from the dry garbage described in step 1, and then transporting the dry garbage after the incombustibles have been removed to a pyrolysis gasifier for pyrolysis and gasification to obtain pyrolysis gas and pyrolysis slag;

[0037]Step 3: Transport the wet garbage described in step 1 to a fermenter for anaerobic fermentation for 72 hours to obtain fermented product and biogas, add a flocculant to the fermented product, stir evenly, take the sediment after standing for stratification, and then Dehydrating the sediment to obtain biogas residue; the amount o...

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Abstract

The invention discloses a method for preparing baked bricks from household garbage. The method comprises the steps: (1) sorting the household garbage so as to obtain dry garbage and wet garbage; (2) carrying out pyrolysis gasification on dry garbage with incombustibles removed, so as to obtain pyrolysis gas and pyrolysis residue; (3) carrying out anaerobic fermentation on the wet garbage, so as to obtain a fermented product and biogas, adding a flocculant into the fermented product, uniformly stirring, standing for layering, taking sediment, and then, dehydrating the sediment, so as to obtain biogas residue; (4) crushing ingredients; (5) uniformly mixing water, the pyrolysis residue, the biogas residue and the ingredients, so as to obtain mixed material; (6) carrying out ageing, extrusion molding and cutting and stacking on the mixed material, so as to obtain green bodies; and (7) drying the green bodies, so as to obtain unburnt bricks, and baking the unburnt bricks, thus obtaining finished baked bricks. The baked bricks prepared by the method have the advantages of high microporosity and good heat preservation and insulation performance, can be applied to building envelopes of energy-saving buildings and can meet the requirement for saving 65% of energy of buildings or the requirement of load-bearing building structures.

Description

technical field [0001] The invention relates to the technical field of sintered brick processing, in particular to a method for preparing sintered bricks from domestic garbage. Background technique [0002] Domestic garbage is an inevitable product in people's life. With the development of urbanization in China, more and more urban populations increase, and the amount of domestic garbage generated increases accordingly. The problem of domestic garbage disposal has begun to emerge. At present, for a long time, there are currently three domestic waste disposal methods in my country, landfill, incineration and composting. Most cities use open-air stacking, natural ditch filling and pit filling to eliminate urban waste, which is harmful to soil, groundwater, atmosphere, etc. The harmless disposal rate of domestic waste is less than 20%. At present, the amount of domestic waste accumulated over the years in the country has reached more than 6 billion tons, and the land area occup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B33/132C12P5/02
CPCY02E50/30Y02P40/60
Inventor 权宗刚肖慧宋心
Owner XIAN RES & DESIGN INST OF WALL & ROOF MATERIALS CO LTD
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