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Sludge curing agent as well as preparation method and use method thereof

A sludge solidifying agent, sludge technology, applied in chemical instruments and methods, sludge treatment, fixed/solidified sludge treatment, etc. Improve compressive strength and dewatering performance, avoid re-pollution of the environment, and reduce the effect of sludge volume

Inactive Publication Date: 2017-02-15
SHANGHAI SHENYAO ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conditioning agent of this invention is an organic component, the cost is relatively high, it is difficult to degrade and has biological toxicity, and in addition, without the inorganic conditioning agent, it is difficult to form a strong network skeleton structure, which cannot improve the incompressibility of the sludge, and cannot improve the filtration efficiency
[0008] Chinese patent CN104926075A discloses a deep dehydration conditioner for excess sludge. The conditioner uses rice husk powder as a sludge dehydration conditioner, which can overcome the current FeCl 3 and CaO will corrode the incineration equipment, the reduction of organic matter is not conducive to incineration and other defects
The conditioning agent used in this invention cannot improve the dehydration of sludge, increase the compressive strength of sludge, and the water content of sludge cannot be significantly reduced after deep dehydration

Method used

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  • Sludge curing agent as well as preparation method and use method thereof

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Effect test

Embodiment 1

[0044] A kind of sludge curing agent, including liquid composition and solid composition, according to the amount of sludge dosage is 100 tons, the dosage of liquid composition is 4 tons, wherein, the liquid composition includes the following components by weight : 6 parts of sodium silicate, 40 parts of magnesium chloride, 30 parts of ferrous sulfate, 2 parts of organic flocculant, 6 parts of water reducer, 252 parts of water; the organic flocculant is octadecyltrimethylammonium chloride. The dosage of the solid composition is 5 tons, and the solid composition includes the following components in parts by weight: 3 parts of calcium oxide, 1 part of plant ash, 1 part of fly ash, and 2 parts of diatomaceous earth.

[0045] The preparation method of sludge solidification agent comprises the following steps:

[0046] 1) Heat and dry calcium oxide, plant ash, fly ash and diatomaceous earth at 105°C for 9 hours to reduce the moisture content to below 2%;

[0047] 2) Use a pulveriz...

Embodiment 2

[0055] A kind of sludge curing agent, including liquid composition and solid composition, according to the amount of sludge dosage is 100 tons, the dosage of liquid composition is 4 tons, wherein, the liquid composition includes the following components by weight : 4 parts of sodium silicate, 40 parts of magnesium chloride, 30 parts of ferrous sulfate, 2 parts of organic flocculant, 2 parts of water reducer, 200 parts of water; and the dosage of solid composition is 5 tons, and the solid composition includes the following Components in parts by weight: 4 parts of calcium oxide, 2 parts of plant ash, and 1 part of diatomaceous earth.

[0056] The preparation method of sludge solidification agent comprises the following steps:

[0057] 1) Heat and dry calcium oxide, plant ash and diatomaceous earth at 105°C for more than 8 hours to reduce the moisture content to below 2%;

[0058] 2) Use a pulverizer to crush calcium oxide, plant ash and diatomite step by step to less than 1mm ...

Embodiment 3

[0065] A kind of sludge curing agent, including liquid composition and solid composition, according to the amount of sludge dosage is 100 tons, the dosage of liquid composition is 4 tons, wherein, the liquid composition includes the following components by weight : 4 parts of sodium silicate, 30 parts of magnesium chloride, 20 parts of ferrous sulfate, 1 part of organic flocculant, 4 parts of water reducer, 220 parts of water; the dosage of solid composition is 5 tons, and the solid composition includes the following weight Parts of components: 4 parts of calcium oxide, 2 parts of plant ash.

[0066] The preparation method of sludge solidification agent comprises the following steps:

[0067] 1) heating and drying calcium oxide and plant ash at 110°C for 10 hours to reduce the moisture content to below 2%;

[0068] 2) Use a pulverizer to crush calcium oxide and plant ash step by step to less than 1mm respectively, use a ball mill to perform ball milling, crushing, and ball mi...

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Abstract

The invention provides a sludge curing agent as well as a preparation method and a use method thereof. The sludge curing agent comprises a liquid composition and a solid composition, wherein the dosage of the liquid composition accounts for 1-6% of the dosage of sludge; the dosage of the solid composition accounts for 1-6% of the dosage of sludge. The sludge curing agent provided by the invention can reduce the sludge water content from 75-85% to 45-60% via the synergistic effect of chemical modification and mechanical dehydration, reduces sludge size, lowers the transportation cost, and facilitates the disposal of the sludge in the later stage; toxic and side products cannot be introduced or generated in sludge dehydration-conditioning and dehydration processes in the invention, to avoid environmental pollution.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, and specifically discloses a sludge solidifying agent, a preparation method and a use method thereof. Background technique [0002] With the commissioning and operation of a large number of sewage treatment plants, sludge production will increase significantly. According to literature reports, in 2011, the total amount of sewage discharge in my country reached 48.24 billion tons, and 8.47 million tons of excess sludge (dry mass) was generated, and the amount of excess sludge discharged every year is increasing at an average annual rate of about 10%. In addition, in the process of sewage biological treatment, the microbiota contacts with the organic matter in the sewage and ingests the biodegraded components in the water to grow and reproduce. The remaining suspended solids, filamentous bacteria, fungi, protozoa, and divalent calcium and magnesium ions in the sludge aggregate together to...

Claims

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Application Information

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IPC IPC(8): C02F11/00
CPCC02F11/008
Inventor 陈良才潘涛唐秀华赵宁华陈辉洋
Owner SHANGHAI SHENYAO ENVIRONMENTAL PROTECTION ENG
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