Efficient, energy-saving and multipurpose sludge recycling device and efficient energy-saving multipurpose sludge recycling method

A sewage treatment device, high-efficiency and energy-saving technology, applied in the direction of sludge treatment, sludge treatment, biological sludge treatment, etc., can solve the problem of incomplete utilization of effective resources, to save the amount of alkali added, simplify the process, and reduce the cost of chemicals low effect

Inactive Publication Date: 2017-01-04
TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a high-efficiency and energy-saving sludge multi-purpose resource treatment device and method, which solves the problem of incomplete utilization of effective resources in sludge treatment in the prior art

Method used

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  • Efficient, energy-saving and multipurpose sludge recycling device and efficient energy-saving multipurpose sludge recycling method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The sludge in a certain city has 35% organic content in dry matter. It is stored anaerobic in the sludge anaerobic silo for 2 days. The anaerobic black sludge is pickled with dilute sulfuric acid in the pickling tank, and the pickling pH=0.5 , The acid-washed sludge solution is washed and sedimented, and the pH of the washing sedimentation tank is 0.7; the sludge precipitated in the washing sedimentation tank enters the organic sludge storage tank, and CaO turbid liquid is added for neutralization, and the neutralized sludge Organic sludge is obtained by dehydration, and the organic content of the organic sludge is 75%; the supernatant of the washing sedimentation tank enters the inorganic solution storage tank, and NaOH solution is added to neutralize the precipitation, and the inorganic sludge is obtained after dehydration. The organic matter in the inorganic sludge content <3%; After the sewage in the system is treated by the sewage treatment device, the effluent reach...

Embodiment 2

[0056] The sludge in a certain city has 35% organic content in dry matter. It is stored anaerobic in the sludge anaerobic silo for 2 days. The anaerobic black sludge is pickled with dilute sulfuric acid in the pickling tank, and the pickling pH=0.5 , The solid content of the sludge solution in the pickling tank is 10%. All the pickling water comes from the supernatant of the washing sedimentation tank. The amount of acid added saves 80%; the sludge solution after pickling is washed and precipitated, and the sedimentation tank is washed with water. All water comes from the effluent of the system sewage physical device, the pH of the washing sedimentation tank is 0.9, and the supernatant of the washing sedimentation tank is partially returned to the acid washing tank; the sludge settled in the washing sedimentation tank enters the organic sludge storage tank, and NaOH is added The turbid liquid is neutralized, and the neutralized sludge is dehydrated to obtain organic sludge; the ...

Embodiment 3

[0058] The sludge in a certain city has an organic content of 42% in dry matter. It is stored anaerobic in the sludge anaerobic silo for 10 days. The anaerobic black sludge is pickled with dilute acetic acid in the pickling tank, and the pickling pH=4 , The solid content of the sludge solution in the pickling tank is 7%, all the pickling water comes from the supernatant of the washing sedimentation tank; the sludge solution after the acid washing is washed and sedimented, and the water used in the washing sedimentation tank is all from the system sewage physical device After the water is discharged, the supernatant of the washing sedimentation tank is partially returned to the pickling tank; the sludge settled in the washing sedimentation tank enters the organic sludge storage tank, and CaO turbid liquid is added for neutralization, and the neutralized sludge is dehydrated. Organic sludge, the organic content of the organic sludge is 68%; the supernatant of the washing sedimenta...

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Abstract

The invention provides an efficient, energy-saving and multipurpose sludge recycling device and an efficient, energy-saving and multipurpose sludge recycling method. The device and the method can be used for solving the problem that effective resources can not be completely utilized during sludge treatment in the prior art. The efficient, energy-saving and multipurpose sludge recycling device comprises a sludge anaerobic cabin, a pickling tank, a washing settling tank, an inorganic solution storage tank, an inorganic sludge storage tank, an inorganic sludge dewatering device, an organic sludge storage tank, an organic sludge dewatering device and a sewage treatment device. Organic sludge and inorganic sludge are separated and then are respectively utilized, so that the device and the method are capable of not only ensuring that the content of heavy metals in the organic sludge reaches the requirement, but also recycling the removed inorganic salts, and realizing complete recycling of sludge. The metal ion extraction efficiency is high, the chemical cost is low, and water in the system can be recycled, so that the device and the method belong to an efficient, energy-saving and multipurpose novel sludge treatment technology.

Description

Technical field [0001] The invention belongs to the field of sludge treatment, and specifically relates to a device and method that can separate organic and inorganic components in sludge. Background technique [0002] Sludge is a solid waste produced in the process of sewage treatment, with high water content and high organic content. Untreated sludge contains a large number of pathogens, parasite eggs, and metal elements such as copper, zinc, chromium, and iron. [0003] The disposal methods of sludge mainly include sanitary landfill, incineration, land use and building materials utilization. Due to the limited landfill space of sludge and easy air pollution caused by incineration, the application of sludge landfill and incineration is gradually reduced. Land use is one of the most effective ways to use sludge as a resource with development potential. The treated sludge is returned to the land for land use. Because it conforms to the concept of resource recycling, and is easy t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/00C02F11/12
CPCC02F11/00C02F11/04C02F11/12Y02W10/20
Inventor 王学科范磊穆童
Owner TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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