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Composite ceramsite prepared from water purification sludge and diatomite

A technology of diatomite and waste diatomite, which is applied in the production of clay products, ceramic products, ceramic materials, etc., can solve the problems of secondary environmental pollution, etc., and achieve low firing energy consumption, good strength, and high water absorption. Effect

Active Publication Date: 2017-03-22
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of secondary pollution to the environment caused by the water purification sludge of the water supply plant, and at the same time combine the waste diatomite produced by the brewery for solid waste resource utilization, and develop a water purification sewage Composite ceramsite prepared from clay and diatomite

Method used

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  • Composite ceramsite prepared from water purification sludge and diatomite

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Effect test

Embodiment 1

[0018] This embodiment provides a kind of composite ceramsite prepared from water purification sludge and diatomite, calculated by weight ratio, its raw materials include:

[0019] 80 parts of water purification sludge;

[0020] 20 parts of diatomaceous earth;

[0021] 10 parts of calcium oxide.

[0022] (1) Raw material preparation

[0023] Dry the purified water sludge at a temperature of 110°C.

[0024] If the diatomite is the waste diatomite recovered from the brewery for filter aid, hydrothermal treatment of the waste diatomite: mix the diatomite with water evenly, put it in the reaction kettle, and put the reaction kettle at a constant temperature Heating in a blast drying oven for 6 h at a temperature of 160 °C, taking out the diatomite after the reaction was completed, and cooling to room temperature naturally. The organic matter in it can be carbonized by hydrothermal method, and the organic matter can be condensed into small spherical particles, so that the spent...

Embodiment 2

[0033] This embodiment provides a kind of composite ceramsite prepared from water purification sludge and diatomite, calculated by weight ratio, its raw materials include:

[0034] 80 parts of water purification sludge;

[0035] 20 parts of diatomaceous earth;

[0036] 10 parts of calcium oxide.

[0037] Preparation steps:

[0038] (1) Raw material preparation

[0039] Dry the purified water sludge at a temperature of 110°C.

[0040] Diatomite is the waste diatomite recovered from the brewery for filter aid, and the waste diatomite is treated with hydrothermal method: the diatomite and water are evenly mixed, placed in the reactor, and the reactor is placed in a constant temperature drum Heat in an air drying oven for 6 h at a temperature of 160 °C. After the reaction is complete, take out the diatomite and let it cool down to room temperature naturally.

[0041] According to the above weight ratio, the pretreated water purification sludge, diatomaceous earth and calcium ...

Embodiment 3

[0049] This embodiment provides a kind of composite ceramsite prepared from water purification sludge and diatomite, calculated by weight ratio, its raw materials include:

[0050] 90 parts of water purification sludge;

[0051] 20 parts of diatomaceous earth;

[0052] 15 parts of calcium oxide.

[0053] Preparation steps:

[0054] (1) Raw material preparation

[0055] Dry the purified water sludge at a temperature of 110°C.

[0056] Diatomite is the waste diatomite recovered from the brewery for filter aid, and the waste diatomite is treated with hydrothermal method: the diatomite and water are evenly mixed, placed in the reactor, and the reactor is placed in a constant temperature drum Heat in an air drying oven for 6 h at a temperature of 160 °C. After the reaction is complete, take out the diatomite and let it cool down to room temperature naturally.

[0057] According to the above weight ratio, the pretreated water purification sludge, diatomaceous earth and calcium ...

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Abstract

The invention relates to composite ceramsite prepared from water purification sludge and diatomite and a preparation method of the composite ceramsite and belongs to the field of inorganic nonmetallic materials. The composite ceramsite is prepared from raw materials in parts by weight as follows: 60-90 parts of water purification sludge, 20-30 parts of diatomite and 10-20 parts of calcium oxide. The preparation method of the composite ceramsite comprises preparation steps of mixing, pelletizing, drying, preheating and roasting. The water purification sludge produced in the production process of a water supply plant and waste diatomite used for auxiliary filtration in a brewery are used as raw materials, the dispose problem of the two wastes can be effectively solved, and wastes are treated by wastes by recycling.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a composite ceramsite for sewage treatment prepared from water purification sludge and diatomite. Background technique [0002] Water purification sludge is a by-product produced in the process of purifying raw water in waterworks. It mainly comes from the backwash drainage of filters, sludge discharge from sedimentation tanks or clarification tanks. Due to the addition of coagulants and softening agents during the precipitation of raw water, the sludge will contain corresponding oxides and hydroxides, such as Fe 2 o 3 , SiO 2 , CaO, Mg(OH) 2 etc. Water purification sludge contains almost all the elements and compounds in the surface layer through which the raw water flows, mainly inorganic components, and less organic components such as humus. At present, the water purification sludge is mainly used as waste for landfill treatment, which not only i...

Claims

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Application Information

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IPC IPC(8): C04B38/08C04B33/132
CPCC04B33/1321C04B33/1324C04B38/009C04B2235/3208C04B2235/3418C04B38/08Y02P40/60
Inventor 冯芳崔荣煜王东田曹丰
Owner SUZHOU UNIV OF SCI & TECH
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