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Method for preparing environment-friendly hollow sintered brick from mixed sludge and slag

A technology of mixing sludge and sintered bricks, applied in clay products, applications, household appliances, etc., can solve the problems of difficult biogas slurry treatment, poor control of fermentation conditions, high investment costs, etc., achieve high dehydration efficiency and expand the range of utilization types , the effect of less investment

Inactive Publication Date: 2019-08-02
广东金宇环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anaerobic fermentation needs to build a large biogas digester, the investment cost is high, the fermentation conditions are not easy to control, biogas slurry treatment is also a problem, and the treated sludge still has a certain odor

Method used

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  • Method for preparing environment-friendly hollow sintered brick from mixed sludge and slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] as attached figure 1 Shown, a kind of method utilizing mixed sludge and slag to prepare environment-friendly hollow sintered brick, comprises the following steps:

[0042] S1, select raw materials, including 2 parts by weight of printing and dyeing sludge, 5 parts of municipal sludge, 10 parts of furnace slag, 25 parts of ceramic polishing slag, and 40 parts of river sludge. When transporting, use a fully sealed sludge transport vehicle to transport it into the sludge storage tank, and store it in a fully enclosed form to avoid odor leakage.

[0043] S2, modification adjustment, place the printing and dyeing sludge and municipal sludge in the corresponding closed biochemical tanks, add water or press filtrate to the printing and dyeing sludge and municipal sludge, control the total solid content to 20%, and then stir evenly , and then add a 30% sodium hydroxide solution to adjust the pH value to 7.5, carry out oxygen aeration to the printing and dyeing sludge and munic...

Embodiment 2

[0055] A method for preparing environmentally friendly hollow sintered bricks by using mixed sludge and slag, comprising the following steps:

[0056] S1, select raw materials, including 5 parts by weight of printing and dyeing sludge, 7 parts of municipal sludge, 12 parts of furnace slag, 35 parts of ceramic polishing slag, and 50 parts of river sludge. When transporting, use a fully sealed sludge transport vehicle to transport it into the sludge storage tank, and store it in a fully enclosed form to avoid odor leakage.

[0057] S2, modification and adjustment, place the printing and dyeing sludge and municipal sludge in the corresponding closed biochemical tanks, add water or press filtrate to the printing and dyeing sludge and municipal sludge, control the total solid content to 15%, and then stir evenly , then add a 30% sodium hydroxide solution, adjust the pH value to 8.0, carry out oxygen aeration to the printing and dyeing sludge and municipal sludge, and produce a stro...

Embodiment 3

[0067] A method for preparing environmentally friendly hollow sintered bricks by using mixed sludge and slag, comprising the following steps:

[0068] S1, select raw materials, including 7 parts by weight of printing and dyeing sludge, 9 parts of municipal sludge, 15 parts of furnace slag, 40 parts of ceramic polishing slag, and 60 parts of river sludge. When transporting, use a fully sealed sludge transport vehicle to transport it into the sludge storage tank, and store it in a fully enclosed form to avoid odor leakage.

[0069] S2, modification adjustment, place the printing and dyeing sludge and municipal sludge in corresponding closed biochemical pools, add water or press filter fluid to the printing and dyeing sludge and municipal sludge, control the total solid content to 10%, and then stir Evenly, then add 30% sodium hydroxide solution, adjust the pH value at 8.5, carry out oxygen aeration to the printing and dyeing sludge and municipal sludge, and produce a strong aero...

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Abstract

The invention discloses a method for preparing an environment-friendly hollow sintered brick from mixed sludge and slag. The method comprises the following steps: selecting 2-7 parts of printing and dyeing sludge, 5-9 parts of municipal sludge, 10-15 parts of furnace slag, 25-40 parts of ceramic polishing slag and 40-60 parts of river flow sludge; firstly, performing modification adjustment and treatment on the printing and dyeing sludge and the municipal sludge, controlling the pH value to 7.5-8.5, carrying out extrusion dewatering treatment till the water content of the printing and dyeing sludge and the municipal sludge is 45-50% and the water content of the river flow sludge is 25-30%, performing biological drying treatment on the printing and dyeing sludge and the municipal sludge, adjusting the carbon-hydrogen ratio within (25-35):1, adding a fermentation agent till the water content of the printing and dyeing sludge and the municipal sludge is 25-30%, finally mixing all raw materials, crushing with two-stage pair rollers, aging, making brick blanks, drying the brick blanks, and sintering in a tunnel kiln, thereby obtaining a finished product. As wastes are adopted as raw materials, not only are remarkable effects of amount reduction and harmlessness of sludge and slag achieved, but also multiple wastes can be comprehensively utilized as resources.

Description

technical field [0001] The invention belongs to the technical field of preparation of sintered bricks, in particular to a method for preparing environment-friendly hollow sintered bricks by mixing various kinds of sludge and slag. Background technique [0002] In recent years, with the needs of economic development and urban construction process, there is a greater demand for new environmentally friendly bricks, especially the "Banning Order" issued by the People's Government of Guangdong Province, which stipulates that the use of clay solid bricks in new residential projects is completely prohibited, and requires New construction, expansion and reconstruction projects must adopt the energy-saving design standards for composite buildings. A series of tax reduction and tax exemption preferential policies have been promulgated to encourage the development of new environmentally friendly bricks and prohibit the use of clay solid bricks, creating good policy conditions and devel...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/135
CPCC04B33/132C04B33/1321C04B33/1324C04B33/1328C04B33/135C04B33/1352C04B2235/656C04B2235/6567Y02P40/60
Inventor 唐映红周济
Owner 广东金宇环境科技股份有限公司