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A kind of sludge degradation treatment method

A treatment method and sludge technology, which are applied in the fields of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of large amount of sludge, limited transportation and discharge, and high viscosity.

Active Publication Date: 2017-05-03
石家庄新奥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. Due to the sludge's high viscosity, high moisture content (above 80%), and high organic content And the characteristics of easy to rot and smell, in the process of sludge treatment, there are problems of difficult transportation and limited discharge
[0003] Therefore, it is urgent to find a sludge degradation treatment method to solve the problem of large amount of sludge, difficult to transport and limited discharge.

Method used

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  • A kind of sludge degradation treatment method
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  • A kind of sludge degradation treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1 of the present invention provides a kind of sludge degradation treatment method, see figure 2 Shown:

[0057] Step 1) mixing the sludge to be treated with oxygen-enriched gas, and treating it under subcritical conditions;

[0058] Specifically: the sludge is pretreated to prepare a sludge slurry that can be pumped, and oxygen-enriched gas is added to the sludge slurry, wherein the mass of oxygen in the amount of oxygen-enriched gas added is 3 times the theoretical oxygen demand of the sludge %, treated under subcritical conditions (22MPa, 373°C).

[0059] Step 2) separating the treated product to obtain combustible gas products, liquid products and solid products;

[0060] Specifically: a combustible gas product, a solid product (water content 20%) and a liquid product are obtained through one-step separation, wherein the combustible gas product can be directly burned, and the heavy metal content in the liquid product is relatively high and cannot be use...

Embodiment 2

[0065] Embodiment 2 of the present invention provides a kind of sludge degradation treatment method, see image 3 Shown:

[0066] Step 1) adding a heavy metal stabilizer to the sludge to be treated, mixing it with oxygen-enriched gas, and treating it under subcritical conditions;

[0067] Specifically: add calcium hydroxide solids to the sludge to be treated, dissolve the solids by stirring, and prepare sludge slurry. The concentration of calcium hydroxide in the sludge slurry is 100g / L, and the sludge slurry The material is mixed with oxygen-enriched gas after pressurized and preheated, wherein the mass of oxygen in the amount of oxygen-enriched gas added is 30% of the chemical oxygen demand of the sludge raw material, and it is treated under subcritical conditions (9MPa, 280°C).

[0068] Step 2) separating the treated product to obtain combustible gas products, liquid products and solid products;

[0069] Specifically: a combustible gas product, a solid product (20% water ...

Embodiment 3

[0071] Embodiment 3 of the present invention provides a kind of sludge degradation treatment method, see Figure 4 Shown:

[0072] Step 1) mixing the sludge to be treated with water to prepare sludge slurry, mixing the sludge slurry with oxygen-enriched gas and treating it under subcritical conditions;

[0073] The specific process is basically the same as that of Example 1, except that the subcritical condition is a pressure of 3 MPa and a temperature of 200°C.

[0074] Step 2) separating the treated sludge to obtain combustible gas products, solid products and liquid products;

[0075] Specifically:

[0076] Step 21) The treated sludge is depressurized and flashed to obtain flash steam and flash substrate, and the first part of liquid product (clean water) and the first part of combustible gas are obtained after the flash steam is cooled; wherein, the clean water can be Directly discharged or used for other purposes or for sludge pulping, the first part of combustible gas...

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Abstract

The invention relates to the field of sludge treatment, in particular to a sludge degradation treatment method. The method can degrade sludge to be combustible gas products, liquid products and solid products, the products are separately treated, and therefore large-scale treatment of the sludge is facilitated, and classified discharging after degradation is facilitated. The defects that in the prior art, sludge is difficult to transport, and large-scale treatment is inconvenient are overcome. According to the embodiment of the sludge degradation treatment method, the method includes the steps that step1, the sludge to be treated is mixed with enriched-oxygen gas, and the mixture is treated under the undercritical conditions; step2, the treated products are separated to obtain the combustible gas products, the liquid products and the solid products.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge degradation treatment method. Background technique [0002] At present, the amount of urban sewage treatment in my country is increasing day by day, and the amount of sludge generated in the process of sewage treatment in my country exceeds 30 million tons every year. Sludge is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. Due to the sludge's high viscosity, high moisture content (above 80%), and high organic content And the characteristics of easy to rot and smell, in the process of sludge treatment, there are problems of difficult transportation and limited discharge. [0003] Therefore, it is urgent to find a sludge degradation treatment method to solve the problems of large amount of sludge, difficulty in transportation and limited discharge. Contents of the invention [0004] The main purpose of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00
Inventor 程乐明王青刘扬宋成才
Owner 石家庄新奥环保科技有限公司
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