Mud and sludge sintered brick and preparation method thereof

A technology of sintered bricks and sludge, which is applied in the direction of biological sludge treatment, pyrolysis sludge, clay products, etc., can solve the problems of occupying large fields, secondary pollution, etc., and achieve improved volume load, good physical and mechanical properties, shortened The effect of volume loading

Inactive Publication Date: 2017-05-31
上海同济普兰德生物质能股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, a large amount of river silt has been cleaned up in recent years. If it is not disposed of effectively, it will occupy a large amount of fields and cause secondary pollution.

Method used

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  • Mud and sludge sintered brick and preparation method thereof
  • Mud and sludge sintered brick and preparation method thereof
  • Mud and sludge sintered brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] Such as figure 1 Shown, a kind of above-mentioned sludge and the preparation method of mud sintered brick of the present invention specifically comprise the following steps:

[0036] (1) Pretreatment of municipal sludge

[0037] Add water to the dewatered sludge in the municipal sewage treatment plant, adjust the TS to about 10%, pump it to the slurry tank of the thermal hydrolysis section for slurry treatment, and then transport it to the thermal hydrolysis flash integrated tank through the screw pump, and Inject saturated steam of 1.8-2.3MPa from the steam boiler from the upper part of the reaction kettle, stop injecting saturated steam when the temperature rises to 160-180°C, and keep it for 20min, exhaust steam and pressure and discharge the mud, the sludge is passed through After cooling, transport it to the anaerobic digestion system for medium-temperature anaerobic digestion T=35°C, SRT=20d, and then directly enter the digested mud into the plate and frame filte...

Embodiment 1

[0050]Embodiment 1: The preparation method of a kind of sludge and silt fired brick of present embodiment 1 specifically comprises the following steps:

[0051] (1) Pre-treatment of municipal sludge: add water to the dewatered sludge (TS=20%) of the municipal sewage treatment plant to adjust the TS to about 10%, pump it to the slurry tank for slurry treatment, and then transport it to the Thermal hydrolysis flash integrated tank, and inject saturated steam of 1.8-2.3MPa from the steam boiler from the upper part of the reactor, stop injecting saturated steam when the temperature rises to 160-180°C, and keep it for 20min, exhaust The pressure is released and the mud is discharged. After cooling, the sludge is transported into the anaerobic digestion system for mesophilic anaerobic digestion (T=35°C, SRT=20d). The above mud directly enters the plate and frame filter press to achieve solid-liquid separation. The moisture content of the solid phase after separation is reduced to ab...

Embodiment 2

[0060] Embodiment 2: the preparation method of a kind of sludge and silt fired brick of present embodiment 2 specifically comprises the following steps:

[0061] (1) Pre-treatment of municipal sludge: Add water to the dewatered sludge (TS=20%) of the municipal sewage treatment plant to adjust the TS to about 10%, pump it to the slurry tank for slurry treatment, and then transport it to the Thermal hydrolysis flash integrated tank, and inject saturated steam of 1.8-2.3MPa from the steam boiler from the upper part of the reactor, stop injecting saturated steam when the temperature rises to 160-180°C, and keep it for 20min, exhaust The pressure is released and the mud is discharged, and the sludge is cooled and transported into an anaerobic digestion system for mesophilic anaerobic digestion (T=35°C, SRT=20d). The above mud directly enters the plate and frame filter press to realize solid-liquid separation, and the moisture content of the solid phase after separation is reduced t...

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Abstract

The invention discloses a mud and sludge sintered brick, which is prepared from the following sintering raw materials in mass fraction according to the oven dry weight: 30 percent to 45 percent of municipal mud sequentially subjected to pyrohydrolysis pretreatment and anaerobic digestion treatment, 35 percent to 60 percent of river sludge with the solid content being 60 to 70 percent, 5 percent to 10 percent of pulverized fuel ash and 5 percent and 10 percent of additive. The invention also discloses a preparation method of the mud and sludge sintered brick. The preparation method comprises the steps of pretreating the municipal mud, pretreating the river sludge, preparing a mixture, forming a green brick, drying, roasting to obtain a finished product, and the like. According to the mud and sludge sintered brick and the preparation method thereof provided by the invention, the digested mud and the dried river sludge are mixed to prepare the sintered brick, so that not only are the problems of the two kinds of sludge solved, but also the secondary pollution problem produced by stacking of the two kinds of sludge is solved, and the resource utilization of the mud and the sludge is realized. The sintered brick prepared through the invention has no crack, no unfilled corner and no pressing marks on the appearance, and has better physical and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of brick making, and in particular relates to a sludge and sludge fired brick and a preparation method thereof. Background technique [0002] With the continuous advancement of large-scale civil engineering construction in my country, the completed area of ​​housing in the construction industry reached 4.208 billion m2 in 2015 alone. 2 , The demand for bricks as building envelope materials is also increasing. Due to the use of clay as a material for traditional clay fired bricks, a large amount of land has been destroyed and the cultivated land resources have been seriously damaged. In order to protect cultivated land resources, the state has issued repeated orders to prohibit and use clay fired bricks. With the in-depth implementation and implementation of the national policy of "banning and restricting stickiness", the production and adoption of clay fired bricks will be restricted. The development and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C02F11/10C02F11/04
CPCC02F11/04C02F11/10C04B33/132C04B33/1321C04B33/1328C04B33/1352C04B2235/77C04B2235/9607Y02E50/30Y02P40/60
Inventor 戴晓虎薛勇刚鲁骎刘文静
Owner 上海同济普兰德生物质能股份有限公司
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