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Coal-fired unit synergized municipal sludge drying system

A technology for urban sludge and coal-fired units, applied in dewatering/drying/concentrating sludge treatment, lighting and heating equipment, steam/steam condensers, etc. The effect of reducing boiler efficiency and improving boiler efficiency

Active Publication Date: 2018-10-16
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above problems, the present invention provides a system for coal-fired units to co-dry and treat low-calorific-value municipal sludge. Harmless treatment has been carried out to solve the problem of environmental pollution caused by exhaust gas discharge after sludge drying

Method used

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  • Coal-fired unit synergized municipal sludge drying system
  • Coal-fired unit synergized municipal sludge drying system

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Embodiment Construction

[0028] like figure 1 As shown, a coal-fired unit cooperative drying urban sludge system includes a coal-fired boiler 1 using a dry slag removal system, an air preheater 2, a dryer 4, a first heat exchanger 51 and a second heat exchanger 52. Coal-fired boilers using a dry slag removal system belong to the prior art and will not be repeated here.

[0029] When the boiler 1 is working, it needs to pass air into the boiler 1 through the combustion-supporting gas inlet of the boiler 1. In order to improve the combustion efficiency of the boiler 1, the air passing into the boiler 1 generally needs to be preheated. The air preheater 2 It is a device for exchanging heat between the flue gas discharged from the boiler 1 and the air passing into the boiler 1 , which belongs to the prior art and will not be repeated here.

[0030] The drying machine 4 includes a fuselage body, a wet sludge inlet 41 is arranged on the upper side of the fuselage body, and a dry sludge outlet 46 is arrang...

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Abstract

The invention discloses a coal-fired unit synergized municipal sludge drying system, which comprises a boiler, an air pre-heater, a drying machine, a first heat exchanger and a second heat exchanger.An air side outlet of the air pre-heater is connected with an air inlet of the boiler and a drying medium inlet of the drying machine, a drying medium outlet of the drying machine is connected with anair side inlet of the first heat exchanger, and an air side outlet of the first heat exchanger is connected with the tail of a bottom dry-type deslagging system of the boiler. A circulating water side of the first heat exchanger and a circulating water side of the second heat exchanger form a first circulating pipeline through a pipeline, a second fan is arranged at an air side inlet of the second heat exchanger, and an air side outlet of the second heat exchanger is connected with an air side inlet of the air pre-heater. The system has advantages that service lives of the a blower and the heat exchangers at the rear end of the drying machine are prolonged while harmless treatment of tail gas is realized, and the problem of tail gas emission after sludge drying is solved.

Description

technical field [0001] The invention relates to the technical field of urban sludge treatment equipment, in particular to a coal-fired unit cooperative drying urban sludge system. Background technique [0002] In recent years, my country has paid more and more attention to sewage treatment. Sewage treatment has reached a fairly high level, but the level of sludge treatment and disposal still needs to be improved. According to reports, by the end of 2014, the harmless disposal rate of sludge produced by sewage treatment plants nationwide was only 56%, and my country's sludge disposal methods are relatively backward. According to the statistics of the China Environmental Yearbook and the E20 Environmental Platform, landfill is still the main method of sludge disposal in my country, which can easily cause subsequent soil or marine pollution. [0003] The moisture content of municipal sludge is often above 80%, and after preliminary drying treatment, the water content can still r...

Claims

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Application Information

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IPC IPC(8): C02F11/12F28B9/08
CPCC02F11/12F28B9/08
Inventor 张利孟董信光胡志宏侯凡军郭新根崔福兴刘科段传俊
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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