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System and method suitable for sludge coupling fire coal burning disposal

A sludge and coal-burning technology, applied in combustion methods, sludge treatment, biological sludge treatment, etc., can solve the problems of low calorific value of wet sludge and high treatment cost of self-built incineration system, achieve low moisture content, reduce The effect of improving steam consumption and dehydration performance in power plants

Inactive Publication Date: 2019-12-03
NANJING CEC ENVIRONMENTAL ENGINEERING CO LTD
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Problems solved by technology

[0004] Due to the low calorific value of wet sludge, it needs to be dried before incineration, and the cost of self-built incineration system is too high

Method used

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  • System and method suitable for sludge coupling fire coal burning disposal

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Embodiment Construction

[0035] The implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The embodiment discloses a system (hereinafter referred to as the system) suitable for sludge coupled with coal-fired incineration, which is used for hydrothermal treatment of sludge, such as figure 1 As shown, the system mainly includes a receiving and storage unit 1 , a hydrothermal unit 2 , a circulating cooling unit 3 , a dehydration unit 4 , a drying unit 5 , an anaerobic digestion unit 6 , an incineration unit 7 , and a digestive liquid treatment unit 8 .

[0037] The receiving and storage unit 1 mainly includes a wet sludge bin 11 and a wet sludge conveying device 12 . The exported wet sludge is stored in the wet sludge bin 11. The wet sludge is transported to the hydrothermal unit 2 through the wet sludge conveying equipment 12 arranged at the bottom of the wet sludge silo 11 .

[0038] The hydro...

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Abstract

The invention discloses a system and a method suitable for sludge coupling fire coal burning disposal. The system comprises a hydrothermal unit, a cooling unit, a dewatering unit, a drying unit, an incineration unit and a water treatment unit, wherein the sludge outlet of the hydrothermal unit is connected with the cooling unit, and the sludge outlet of the cooling unit is connected with the dewatering unit; the sludge outlet of the dewatering unit is connected with the drying unit; the filtrate outlet of the dewatering unit is connected with the water treatment unit; and the sludge outlet ofthe drying unit is connected with the incineration unit. According to the system, a hydro-thermal treatment technology is coupled with a fire coal thermal power generating unit, so that the final treatment of the sludge is rapidly and thoroughly realized, the energy utilization of the sludge is also realized, the coal consumption of the power plant is reduced, and the system plays an important role in cracking the sludge treatment problem and improving the energy structure.

Description

technical field [0001] The invention relates to the technical field of sludge treatment and disposal, in particular to a system and method suitable for sludge coupled with coal-fired incineration and disposal. Background technique [0002] As a derivative of water treatment, sludge production has been on the rise in recent years. my country produces 30 million to 40 million tons of municipal sludge with a water content of about 80% every year. It is estimated that by 2020, my country's municipal sludge output will reach 60 million tons to 90 million tons. Contrary to the increasing trend of sludge production year after year, the sludge disposal rate in my country is low, and a large amount of sludge cannot be disposed of safely and reasonably, directly causing secondary pollution to water bodies, soil and the atmosphere, and posing a serious threat to the ecological environment. In addition, the direct discharge of sludge also causes a great waste of resources. How to dea...

Claims

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Application Information

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IPC IPC(8): C02F11/13C02F11/10C02F11/04C02F11/122F23G7/00F23G5/02F23G7/06F23J15/02
CPCC02F11/04C02F11/10C02F11/122C02F11/13F23G5/02F23G7/00F23G7/06F23J15/022
Inventor 刘政艳祁本武张烨
Owner NANJING CEC ENVIRONMENTAL ENGINEERING CO LTD
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