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Method for preparing baked bricks from household garbage

A technology of domestic waste and sintered bricks, which is applied in the field of sintered bricks processing, can solve the problems of waste of resources, etc., and achieve the effects of energy saving, high garbage recycling rate, and high microporosity

Active Publication Date: 2015-02-11
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 for preparing sintered bricks using domestic waste in this embodiment includes the following steps:

[0022] Step 1. Sort the domestic garbage, remove the heavy metal garbage and plastic garbage, and then separate the domestic garbage after removing the heavy metal garbage and plastic garbage to obtain dry garbage and wet garbage;

[0023] Step 2: Remove the incombustibles in the dry garbage described in Step 1, and then transport the dried garbage after removing the incombustibles 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 the fermentor for anaerobic fermentation for 48 hours to obtain the fermented product and biogas. Add flocculant to the fermented product, stir evenly, stand for layering and take the sediment, then The sediment is dehydrated to obtain biogas residue; the amount of the flocculant is 5% of the mass of the fermented material, an...

Embodiment 2

[0031] This embodiment is the same as embodiment 1, and the difference is 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 kinds of coal gangue, shale, silica sand and clay with one of bentonite and fly ash, or two kinds 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 65% or the requirement of load-bearing building structure, and has good economic benefits.

Embodiment 3

[0034] The method for preparing sintered bricks using domestic waste in this embodiment includes the following steps:

[0035] Step 1. Sort the domestic garbage, remove the heavy metal garbage and plastic garbage, and then separate the domestic garbage after removing the heavy metal garbage and plastic garbage to obtain dry garbage and wet garbage;

[0036] Step 2: Remove the incombustibles in the dry garbage described in Step 1, and then transport the dried garbage after removing the incombustibles 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 the fermentor for anaerobic fermentation for 72 hours to obtain fermented product and biogas. Add flocculant to the fermented product, stir evenly, stand for stratification and take the sediment, then Dewatering the sediment to obtain biogas residue; the amount of the flocculant is 3% of the fermented product mass, the mass pe...

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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 waste. Background technique [0002] Domestic waste is an inevitable product in people's lives. With the development of urbanization in China, more and more urban populations increase, and the generated domestic waste increases, and the problem of domestic waste disposal begins to emerge. At present, for a long time, there are currently three types of domestic waste disposal methods in my country: landfill, incineration and composting. Most cities adopt open-air stacking, natural trench filling and pit filling methods to dispose of municipal waste, which affects the soil, groundwater, and atmosphere. Cause actual impact and potential harm, and the harmless treatment rate of domestic garbage is less than 20%. At present, the amount of domestic garbage stored in the country over the years has reached more than 6 bill...

Claims

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Application Information

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