Method and device for treating organic solid waste

Abstract

The invention discloses a method and device for treating organic solid waste. The method comprises the steps: (a) carrying out physico-chemical pretreatment, namely adding water and additives into the waste, and heating and stirring; (b) carrying out hydrolysis, namely hydrolyzing the waste which is subjected to physico-chemical pretreatment, so as to obtain a hydrolyzate; (c) carrying out oxidization, namely oxidizing the hydrolyzate, so as to obtain an oxidization product; (d) carrying out solid-liquid separation, namely carrying out solid-liquid separation on the oxidization product, so as to obtain a solid oxidization product and a liquid oxidization product; and (e) carrying out activation, namely activating the solid oxidization product in the case of heating, pressurizing, steaming and additive adding, thereby obtaining an activated product.

Description

technical field [0001] The invention relates to the field of waste treatment, in particular to a method and device for treating organic solid waste and turning it into high-quality activated organic fertilizer. Background technique [0002] Traditional waste recycling methods include incineration power generation method, biochemical composting method, biogas recovery method after sanitary landfill, pyrolysis gasification method, pyrolysis oil refining method, wet oxidation material or energy recovery method, anaerobic oxidation method, solidification Building Materials Law, etc. At present, incineration power generation and biochemical composting are the main methods of recycling urban waste such as garbage and sludge. Biogas recovery from landfills is only used as an auxiliary operation under pollution control of landfills, rather than as the main method of resource recovery. Although the above three methods of power generation, composting, and landfill biogas recovery ar...

AI Technical Summary

Problems solved by technology

[0006] Question 1: The HiROS method basically uses the same process to treat various types of organic solid wastes, and operates hydrolysis and oxidation in the same stable tank, so it may cause incomplete, failure or failure in the treatment of different types of organic solid wastes. Dealing with excess and reducing the production of organic fertilizers;

[0007] Problem 2: It is difficult to hydrolyze easily degradable organic matter in a very short period of time (for example, within two minutes) due to the thermal hydrolysis operating principle and parameters used, as well as the stabilized kettle unit operating equipment used;

[0008] Problem 3: It is difficult to achieve a balance between the thermal hydrolysis rate and the thermal oxidation rate in the high-speed stable kettle, resulting in incomplete decomposition of easily degradable organic matter;

[0009] Problem 4: It is difficult to balance the oxygen supply rate and oxygen demand rate in a high-speed stable kettle in a very short time, resulting in incomplete decomposition of easily degradable organic matter;

[0010] Question 5: If the heat released by the oxidation of easily degradable organic matter cannot be exported and collected in a short period of time, it may cause the inability to raise the temperature quickly and affect the effective recovery and reuse of energy and the progress of self-sustaining reactions;

[0011] Question 6: How to make the most effective application of the heat generated by the high-speed stabilizing kettle in the treatment plant, and how to avoid the solidification or carbonization of small organic particles in the kettle and prevent the transmission of heat energy;

[0012] Question 7: Solid-liquid separation method under high temperature and high pressure and how to avoid frequent maintenance problems;

[0013] Question 8

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