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Technology for manufacturing technological bricks by utilizing sludge

A manufacturing process and sludge technology, which is applied in the field of sludge harmless treatment and resource utilization and building materials, can solve the problems affecting the quality of bricks and waste of resources, etc.

Inactive Publication Date: 2018-01-09
NANJING LVZHICHENG PATENT TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sludge itself contains a large amount of organic debris and bacterial cells, which will produce stench. Urban sludge also contains a large amount of phosphorus. Phosphorus is the main material for making phosphate fertilizer. According to calculations by different authoritative organizations around the world, only 60% of the world's phosphorus resources can be used. -130 years, so it is very necessary to recycle phosphorus in sludge. In the existing sludge brick-making process, the above-mentioned substances are rarely separated and treated, and the sludge is directly dried to make bricks, which will affect the bricks made. block quality and cause waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A process for manufacturing technical bricks using sludge, which is characterized in that it includes the following steps: a. Carry out ozone treatment to raw sludge: put the sludge into an ozone treatment tank, and the ozone treatment tank is blown into the ozone treatment tank through the supply sludge The carrier gas containing ozone makes the sludge foam, and the phosphorus in the sludge is adsorbed by the adsorbent obtained by roasting at 350 °C for 3 hours through the hydrotalcite-like sorbent with a molar ratio of Zn to Al of 2.5:1;

[0019] b. Dehydration and drying treatment of the sludge after ozone treatment: adding 35mg / L hydrated lime to the sludge for dehydration, destroying the stable structure of the sludge colloid, expanding the particle gap, and then using an independent heat source to dry, said The drying temperature of the independent heat source is 260°C. After the moisture evaporated from the sludge is heated and dried together with the carrier gas ...

Embodiment 2

[0023] A process for manufacturing technical bricks using sludge, which is characterized in that it includes the following steps: a. Carry out ozone treatment to raw sludge: put the sludge into an ozone treatment tank, and the ozone treatment tank is blown into the ozone treatment tank through the supply sludge The carrier gas containing ozone makes the sludge foam, and the phosphorus in the sludge is adsorbed by the adsorbent obtained by roasting at 350 °C for 3 hours through the hydrotalcite-like sorbent with a molar ratio of Zn to Al of 2.5:1;

[0024] b. Dehydration and drying treatment of the sludge after ozone treatment: adding 40mg / L slaked lime to the sludge for dehydration, destroying the stable structure of the sludge colloid, expanding the particle gap, and then using an independent heat source to dry. The drying temperature of the independent heat source is 280°C. After the moisture evaporated from the sludge is heated and dried together with the carrier gas in step...

Embodiment 3

[0028] A process for manufacturing technical bricks using sludge, which is characterized in that it includes the following steps: a. Carry out ozone treatment to raw sludge: put the sludge into an ozone treatment tank, and the ozone treatment tank is blown into the ozone treatment tank through the supply sludge The carrier gas containing ozone makes the sludge foam, and the phosphorus in the sludge is adsorbed by the adsorbent obtained by roasting at 350 °C for 3 hours through the hydrotalcite-like sorbent with a molar ratio of Zn to Al of 2.5:1;

[0029] b. Dehydration and drying treatment of the sludge after ozone treatment: add 45 mg / L hydrated lime to the sludge for dehydration, destroy the stable structure of the sludge colloid, expand the particle gap, and then use an independent heat source to dry. The drying temperature of the independent heat source is 300°C. After the moisture evaporated from the sludge is heated and dried together with the carrier gas in step a, it i...

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PUM

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Abstract

The invention provides a technology for manufacturing technological bricks by utilizing sludge. The technology comprises the following steps: carrying out ozone treatment, dehydration and drying treatment, heavy metal curing treatment and sludge fermentation and deodorization treatment on raw material sludge; after carrying out the treatment on the raw material sludge, mixing the treated sludge with clay and an additive and stirring; then conveying a mixture into an ageing tank and ageing for 12h; finally, after preparing a blank, carrying out color matching and drying, sintering; cooling to room temperature after carrying out sectional-temperature sintering, so as to finish firing of the technological bricks manufactured by the sludge. According to the technology provided by the invention, the technological bricks are manufactured by utilizing the sludge as the raw material, so that the reduction and reclamation of the sludge are realized, the pollution to the environment is reduced,and resources are recycled.

Description

technical field [0001] The invention belongs to the technical field of sludge harmless treatment and resource utilization and building materials, and in particular relates to a technique for manufacturing technical bricks using sludge. Background technique [0002] Sludge is a solid sedimentary substance produced in the process of water and sewage treatment. It is a colloidal substance with high water content and strong water retention. If sludge is used to make bricks, the sludge must first be dried and dehydrated so that the water content in the sludge meets the requirements for making sludge raw materials. Generally, a dryer is used when drying and dehydrating the sludge. High energy consumption. [0003] Sludge itself contains a large amount of organic debris and bacterial cells, which will produce stench. Urban sludge also contains a large amount of phosphorus. Phosphorus is the main material for making phosphate fertilizer. According to calculations by different autho...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/13C04B33/32C02F11/00C02F11/02C02F11/06C02F11/14C02F101/20
CPCY02P40/60
Inventor 张玥
Owner NANJING LVZHICHENG PATENT TECH DEV CO LTD