Three-stage sludge dewatering and drying system and method in domestic sewage treatment plant

A technology for domestic sewage and treatment plants, which is applied in the fields of water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., and can solve the problems of difficult direct connection of domestic sewage treatment plants and no energy recovery.

Pending Publication Date: 2020-10-30
北控水务(中国)投资有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the problems existing in the prior art, the purpose of the present invention is to provide a three-stage sludge dehydration and drying system and method in a domestic sewage treatment plant, w

Method used

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  • Three-stage sludge dewatering and drying system and method in domestic sewage treatment plant
  • Three-stage sludge dewatering and drying system and method in domestic sewage treatment plant
  • Three-stage sludge dewatering and drying system and method in domestic sewage treatment plant

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Embodiment

[0116] see Image 6 , this embodiment is a three-stage dehydration and drying sludge method using the above-mentioned three-stage sludge dehydration and drying system in a domestic sewage treatment plant, including:

[0117] 1) In a domestic sewage treatment plant, the remaining sludge with a water content of 99.2% is pumped into the short-time concentration tank, and the sludge enters from the central cylinder of the short-time concentration tank, and the remaining sludge is guided downward through the central cylinder with a reflector Under the action of gravity, the sludge is deposited on the bottom and side wall of the short-term thickening tank. Under the action of the liquid level difference, the concentrated sludge at the bottom of the tank passes through the suction pipe at the bottom of the sludge pipe, the branch pipe of the sludge pipe, and the sludge pipe. The valve is sent to the body of the concentrated sludge storage tank by pressure, and the tank body is equipp...

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PUM

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Abstract

The invention discloses a three-stage sludge dewatering and drying system and a method in a domestic sewage treatment plant. The system comprises: a short-time concentration tank, a dilute sludge conveying equipment, a high-pressure belt type machine conditioning tank, a high-pressure belt type dehydrator, a sludge cake conveying equipment, a heat recovery type hot air drying machine subsystem, aheat recovery type dry sludge conveying subsystem, a dry sludge bin, a high-pressure belt type machine flocculant dosing device, a high-pressure belt type machine coagulant aid dosing device, a hot air drying condensate water tank and a recycling pump. The system can be used for continuously dehydrating and drying residual sludge in a domestic sewage treatment plant, the three sections are respectively short-time concentration tank concentration, high-pressure belt type machine dehydration and hot air drying, and the sludge is dried until the water content is below 40%. The system is small inoccupied area and can be conveniently connected with a domestic sewage treatment plant, heat can be recycled in the drying process, and energy consumption and cost are effectively reduced.

Description

technical field [0001] The invention relates to the field of deep dehydration and drying in sludge treatment, in particular to a three-stage sludge dehydration and drying system and method in a domestic sewage treatment plant. Background technique [0002] At present, various water contents of sludge produced by domestic sewage treatment plants coexist. According to the requirements of GB18918-2002 "Pollutant Discharge Standards for Urban Wastewater Treatment Plants", sludge from urban sewage treatment plants should be dehydrated. After dehydration, the moisture content of sludge It should be less than 80%; according to the requirements of GB16889-2008 "Pollution Control Standards for Domestic Waste Landfill Sites", solid residues after biological treatment such as anaerobic biogas production, solid residues after feces treatment, and sludge from domestic sewage treatment plants After treatment, the moisture content is less than 60%, and it can be disposed of in domestic was...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/123C02F11/13C02F11/143C02F11/147
CPCC02F11/12C02F11/123C02F11/13C02F11/143C02F11/147
Inventor 陈云吴云生关春雨张宝林王艳曹天宇
Owner 北控水务(中国)投资有限公司
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