Method and continuous system for treating wet organic waste

A technology for organic waste and treatment methods, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. The effect of high efficiency and improved energy utilization efficiency

Pending Publication Date: 2016-09-28
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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Problems solved by technology

[0008] The purpose of the present invention is to: propose a treatment method and continuous treatment system for wet organic waste, the system is simple, and at the same time, the heat exc

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  • Method and continuous system for treating wet organic waste
  • Method and continuous system for treating wet organic waste
  • Method and continuous system for treating wet organic waste

Examples

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[0046] Example 1:

[0047] Using 82.21% sludge of a sewage treatment plant with water content as raw material and oxygen (99.99% oxygen + 0.01% nitrogen) as oxidant, the sludge hydrothermal oxidation reaction is carried out in a fully mixed flow reactor with a free liquid surface. The results of sludge industrial analysis, element analysis and calorific value analysis are shown in Table 1. The sludge treatment capacity is 10362.3kg / h, and the oxygen consumption is 2215kg / h. The sludge is pumped under pressure by a sludge pump, and the casing preheater on the outside of the conveying pipeline heats it from room temperature to about 150°C before sending it into the reactor. The liquid oxygen stored in the liquid oxygen tank is pressurized by the liquid oxygen pump, heated and gasified by the vaporizer, and then sent to the reactor to undergo hydrothermal oxidation reaction with the sludge. The excess factor of the oxidant in this process is 1.2.

[0048] The reaction temperature in...

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Abstract

The invention discloses a method and a continuous system for treating wet organic waste, and belongs to the field of environmental protection/sewage treatment/sludge treatment. The method includes steps of conveying and preheating raw materials; carrying out hydrothermal oxidation reaction; removing oxygen from oxidation reaction products; recycling reaction heat; carrying out flash dehydration; carrying out mechanical dehydration; treating filter liquid; treating tail gas. The continuous system comprises a wet organic waste raw material pump, a sleeve heater, a hydrothermal oxidation reactor, an oxygen remover, waste heat recycling heat exchangers, a byproduct steam plant, a flash plant, a dehydration plant and a tail gas treatment plant. The method and the continuous system have the advantages that the continuous system is simple, the wet organic waste can be directly treated without being dried, the reaction is easy to maintain under self-heating conditions without external heat, a large quantity of heat of the high-temperature materials can be recycled, the method and the continuous system are high in energy utilization rate, and a large quantity of economic byproducts (steam) can be generated; problems that existing raw material preheating heat exchangers are vulnerable to blocking and existing waste heat recycling heat exchangers are vulnerable to corrosion can be solved by the aid of the method and the continuous system.

Description

technical field [0001] The invention belongs to the fields of environmental protection / sewage treatment / sludge treatment, and in particular relates to the treatment of wet organic waste. Background technique [0002] The technical background of the present invention is the treatment of wet organic waste. Wet organic waste refers to waste containing a large amount of water and organic components, such as municipal sludge, livestock and poultry manure, kitchen waste, papermaking black liquor, high-concentration Organic wastewater, etc., especially but not limited to municipal sludge produced by urban sewage treatment plants. The typical moisture content of mechanically dewatered sludge produced by sewage treatment plants is about 80%, and further dewatering is very difficult. Sludge has a foul smell and contains heavy metals, pathogenic bacteria, parasites and some persistent organic poisons. It is easy to cause secondary pollution to groundwater and soil, threatening environ...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/18F22B33/18
CPCF22B33/18C02F11/12C02F11/121C02F11/18
Inventor 李维成覃小刚房慧文路杨欢王焕孙登科金黄
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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