Continuous deep dewatering and low temperature drying cooperation method for sludge

A deep dehydration and sludge drying technology, which is applied in the directions of dehydration/drying/concentrated sludge treatment, sludge treatment through temperature control, refrigeration and liquefaction, etc. It can solve the problems of limited efficiency, limited processing capacity and high energy consumption.

Active Publication Date: 2017-05-31
上海中耀环保实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can reduce the moisture content of the sludge to 60%, but the method is complicated and the cost is high
[0006] Chinese patent CN200920067632.4 provides a system for drying sludge using solar energy. It first collects solar energy through the insulation shed, and then transfers the heat to the sludge drying rotary kiln through the solar heat collecting air duct to realize sludge drying. There are

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  • Continuous deep dewatering and low temperature drying cooperation method for sludge
  • Continuous deep dewatering and low temperature drying cooperation method for sludge
  • Continuous deep dewatering and low temperature drying cooperation method for sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0112] The primary dewatered sludge with a moisture content of 75-85% after the sewage treatment plant is dewatered by a filter press, such as figure 1 As shown, the primary dewatered sludge storage bin passes through the conveyor in turn through the sludge modification mixer and the sludge deep dehydrator for continuous deep dehydration treatment. The continuous deep dehydration treatment of primary dewatered sludge includes 2 processes:

[0113] (1) Sludge modification: the primary dewatered sludge enters the sludge modification mixer from the primary dewatered sludge storage bin, and adds Shanghai Shenyao Environmental Engineering Co., Ltd. with a sludge mass of 1-6%, preferably 2-5%. The sludge composite modifier produced, the primary dewatered sludge and the sludge composite modifier are mixed and reacted in the sludge modification mixer for 1 to 5 minutes, preferably 2 to 4 minutes, and the power of the sludge modification mixer is 4-7.5 kW.

[0114] (2) Squeeze dehydr...

Embodiment 2

[0122] The moisture content of the primary dewatered sludge after the excess sludge of a city sewage treatment plant in Jiangsu is dewatered by a belt filter press is 82%, and the output of the primary dewatered sludge is 100t / d. Such as figure 1 As shown, the primary dewatered sludge storage bin passes through the belt conveyor in turn through the sludge modification mixer and the sludge deep dehydrator for continuous deep dehydration treatment. The continuous deep dehydration treatment of primary dewatered sludge includes 2 processes:

[0123] (1) Sludge modification: the primary dewatered sludge enters the sludge modification mixer from the primary dewatered sludge storage bin, and adds the sludge composite modifier produced by Shanghai Shenyao Environmental Protection Engineering Co., Ltd. which is 1% of the sludge mass , the primary dewatered sludge and the sludge compound modifier are mixed and reacted in the sludge modification mixer for 3.5 minutes, and the power of t...

Embodiment 3

[0129] The moisture content of the primary dewatered sludge after dewatering by a plate and frame filter press in a city sewage treatment plant in Shaanxi is 80%, and the output of the primary dewatered sludge is 50t / d. Such as figure 1 As shown, the primary dewatered sludge storage bin passes through the belt conveyor sequentially through the sludge modification mixer and the sludge deep dewatering machine for continuous deep dehydration treatment. The continuous deep dehydration treatment of primary dewatered sludge includes 2 processes:

[0130] (1) Sludge modification: the primary dewatered sludge enters the sludge modification mixer from the primary dewatered sludge storage bin, and adds the sludge composite modifier produced by Shanghai Shenyao Environmental Protection Engineering Co., Ltd. which is 3% of the sludge mass , the primary dewatered sludge and the sludge compound modifier are mixed and reacted in the sludge modification mixer for 3 minutes, and the power of ...

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Abstract

The invention provides a continuous deep dewatering and low temperature drying cooperation system for sludge. The continuous deep dewatering and low temperature drying cooperation system comprises a preliminarily dewatered sludge storage bin, a sludge modification mixing machine, a sludge dewatering machine, a dewatered sludge cache bin and low temperature drying equipment, wherein the preliminarily dewatered sludge storage bin, the sludge modification mixing machine, the sludge dewatering machine and the dewatered sludge cache bin are connected in sequence through a conveyer; the low temperature drying equipment is located below the dewatered sludge cache bin. The invention further provides a continuous deep dewatering and low temperature drying cooperation method for the sludge. The continuous deep dewatering and low temperature drying cooperation method and the continuous deep dewatering and low temperature drying cooperation system which are provided by the invention can be widely applied to deep dewatering and drying treatment of preliminarily dewatered sludge in a sewage treatment plant, so as to reduce the moisture content of the preliminarily dewatered sludge from 75 to 85 percent to 10 to 45 percent, and finally realize reduction, stabilization and recycling of the sludge; meanwhile, the investment cost of the equipment and the operation cost of the system are reduced.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment and disposal, and relates to a method and system for continuous deep dehydration and low-temperature sludge drying. Background technique [0002] With the construction and operation of a large number of sewage treatment plants across my country, the sewage treatment rate has increased significantly, and the sludge output has also increased simultaneously. Based on a moisture content of 80%, by the end of 2012, the total annual sludge output in China had exceeded 30 million tons. According to forecasts, by 2020, the amount of sludge will exceed 60 million tons per year. Sewage plant sludge is rich in organic matter, heavy metals, pathogenic microorganisms and other toxic and harmful substances contained in sewage, which has greater biological toxicity. On the other hand, the "Water Ten Measures" issued in April 2015 further stipulates the promotion of sludge treatment and disposal: "The ...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/14C02F11/18F25B1/00
Inventor 陈良才李建赵宁华李超唐秀华魏宏斌
Owner 上海中耀环保实业有限公司
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