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Sludge deep dewatering treatment system and process

A technology of deep dehydration and treatment process, applied in the direction of dehydration/drying/concentrated sludge treatment, which can solve the problem of large heat loss and achieve the effect of high energy utilization value

Inactive Publication Date: 2013-08-21
SHANGHAI TECHASE ENVIRONMENT PROTECTION
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Problems solved by technology

[0011] In view of the existing sludge dehydration technology, the water content of the sludge after dehydration still cannot reach the national standard, and the problem of large heat energy loss, the present invention provides an integrated sludge deep dehydration treatment system and process, which can convert the raw sludge ( Sludge with a moisture content of about 99% to 97%) is processed into a mud cake with a moisture content of less than 50% by simple chemical conditioning and mechanical pressing

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  • Sludge deep dewatering treatment system and process

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Embodiment 1

[0032] Embodiment 1: adopt the sludge advanced dehydration treatment process of the present invention to process the sludge data as follows:

[0033] Sludge properties: residual sludge from municipal sewage treatment plants, sludge moisture content 99.2%

[0034] Processing scale: 5000 tons / day

[0035] Running time: three shifts a day, running time 20h

[0036] Treatment goal: reduce the moisture content of sludge to less than 60%, which is convenient for subsequent resource treatment.

[0037] Operating costs: mainly include pharmaceutical costs, electricity costs, labor costs, etc.

[0038] 1. Material cost: The cost of flocculant is about 30,000 yuan / t, the dosage is 4‰ of the absolute dry sludge, and the cost of chemicals per ton of sludge is 24 yuan / t. The cost of conditioning agent is about 800 yuan / t, the dosage is 5%, and the cost of agent for ton of sludge is 40 yuan / t.

[0039] 2. Electricity fee: The total installed power of the equipment is 79kW, and the pow...

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Abstract

Relating to the technical field of sludge treatment, the invention discloses a sludge deep dewatering treatment system and a process specific to the problems that the water content of dewatered sludge cannot reach the national standard and the heat energy loss is great in existing sludge dewatering technologies. The treatment system comprises a volute sludge dewatering device, a sludge wall breaking modification device, a high pressure elastic squeezing device, a sludge transportation device and a wastewater treatment discharge device that are connected in order. The treatment process includes the steps of: a. concentration: subjecting primary sludge to concentration by means of mechanical extrusion; b. modification: mixing the concentrated sludge with curing conditioners in the sludge wall breaking modification device uniformly to make the discharged sludge reach modification requirements; and c. filter pressing: carrying out filter pressing on the modified sludge so as to obtain a sludge cake with a water content of less than 60%-50%. The treatment system and process provided in the invention are especially suitable for deep dewatering on sludge.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge deep dehydration treatment system and a treatment process. Background technique [0002] At present, sewage treatment plants generally use landfill or simple stacking to dispose of sludge. As the country pays more attention to the supervision of sludge treatment, it is required that sludge treatment and disposal must be planned, constructed and operated simultaneously with sewage treatment plants. The market for standardized sludge treatment and disposal began to gradually form. The goal of sludge disposal is first to control pollution and ensure safety, then to rationally utilize it, and finally to develop clean energy. In order to unify the sludge disposal technology, the Ministry of Housing and Urban-Rural Development and the Ministry of Environmental Protection have successively issued a series of standard requirements for sludge disposal, stipulating that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 刘道广张文标田建强
Owner SHANGHAI TECHASE ENVIRONMENT PROTECTION
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