Process and device for efficiently treating mixed raw material biogas slurry

A technology of mixing raw materials and biogas slurry, which is applied in filtration treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems such as the inability of flocs to float completely, the cost is high, and the requirements cannot be met, and the treatment cost can be reduced. , Long shelf life, the effect of meeting the needs of environmental protection

Pending Publication Date: 2021-07-27
常州思特恩节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment methods of mixed biogas slurry generally include biochemical method and air flotation method. The biochemical method is PM dosing, which is to reduce the content of COD and SS in the mixed biogas slurry, and the COD in the mixed biogas slurry is 8000 ~15000mg/L, SS content is 9000~16300mg/L, need to use more dosage, so the cost of using PM dosing is higher; the air flotation method is to flocculate the mixed biogas slurry by filling air bubbles The final solid particles are carried to the surface of the biog

Method used

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  • Process and device for efficiently treating mixed raw material biogas slurry
  • Process and device for efficiently treating mixed raw material biogas slurry

Examples

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Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Using a device for efficient treatment of mixed raw material biogas slurry to treat pig manure biogas slurry with the following process, the process steps include:

[0042] S1. Primary filtration, the filtration accuracy of S1 primary filtration is 1mm, which is used to filter impurities such as hair, plant fiber, food residue, sand and gravel in biogas slurry;

[0043] S2. Ultrasonic dispersal. In S2 ultrasonic dispersal, the ultrasonic frequency is 20KHz and the wavelength is 0.0179m, which is used to break the large particle colloid in the biogas slurry and prepare for the subsequent flocculation and air flotation;

[0044] S3. Dosing flocculation for the first time: add flocculant to the biogas slurry delivery pipeline, the flocculant added for the first time to the biogas slurry is fully mixed in the pipeline, the mixing time is 10s, the volume of the flocculant is 1.2% of the volume of the biogas slurry, The concentration of the flocculant is 0.08%, whi...

Embodiment 2

[0048] Example 2: Use the device for efficient treatment of mixed raw material biogas slurry to treat pig manure biogas slurry with the following process, the process steps include:

[0049] S1. Primary filtration, the filtration accuracy of S1 primary filtration is 1mm, which is used to filter impurities such as hair, plant fiber, food residue, sand and gravel in biogas slurry;

[0050] S2. Ultrasonic dispersal. In S2 ultrasonic dispersal, the ultrasonic frequency is 40KHz and the wavelength is 0.009m, which is used to break the large particle colloid in the biogas slurry and prepare for the subsequent flocculation and air flotation;

[0051] S3. Dosing flocculation for the first time: add flocculant to the biogas slurry delivery pipeline, the flocculant added for the first time in the biogas slurry is fully mixed in the pipeline, the mixing time is 15s, the volume of the flocculant is 1.8% of the volume of the biogas slurry, The concentration of the flocculant is 0.12%, whic...

Embodiment 3

[0055] Embodiment 3: Use the device for high-efficiency treatment of mixed raw material biogas slurry to treat pig manure biogas slurry with the following process, and the process steps include:

[0056] S1. Primary filtration, the filtration accuracy of S1 primary filtration is 1mm, which is used to filter impurities such as hair, plant fiber, food residue, sand and gravel in biogas slurry;

[0057] S2. Ultrasonic dispersal. In S2 ultrasonic dispersal, the ultrasonic frequency is 30KHz and the wavelength is 0.011m, which is used to break the large particle colloid in the biogas slurry and prepare for the subsequent flocculation and air flotation;

[0058] S3. Dosing flocculation for the first time: add flocculant to the biogas slurry delivery pipeline, the flocculant added for the first time in the biogas slurry is fully mixed in the pipeline, the mixing time is 12s, the volume of the flocculant is 1.5% of the volume of the biogas slurry, The concentration of the flocculant i...

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Abstract

The invention discloses a process and a device for efficiently treating mixed raw material biogas slurry. The process for efficiently treating the mixed raw material biogas slurry comprises the following steps: S1, primary filtration; S2, ultrasonic scattering; S3, primary dosing and flocculation; S4, secondary dosing and flocculation; S5, efficient air flotation; and S6, efficient filter pressing. The device for the process for efficiently treating the mixed raw material biogas slurry comprises a grille dirt cleaner, an ultrasonic generator, a doser, an air floater and a filter press, wherein the output end of the ultrasonic generator is connected with the water inlet of the air floater through a dosing pipeline, the doser is communicated with the middle of the dosing pipeline through a first branch, and the doser is communicated with the dosing port of the air floater through a second branch. According to the invention, the diameter of suspended matter particles in the treated biogas slurry is controlled to be 63 microns or below, the indexes of the biogas slurry meet the requirements of various indexes of NY/T2596-2014 biogas manure, the requirement for using the biogas slurry by using a drip irrigation pipe network is met, and the national call about drip irrigation development is complied with.

Description

technical field [0001] The invention relates to the technical field of biogas slurry treatment, in particular to a process and a device for efficiently treating mixed raw material biogas slurry. Background technique [0002] Mixed biogas slurry refers to the mixed waste liquid obtained after the feces produced by animal husbandry and planting industry (straw and plant pressing residues, etc.) are mixed to prepare biogas through anaerobic fermentation. The color of the mixed biogas slurry is usually dark brown or black, has an odor, and is rich in nitrogen, phosphorus, potassium and other beneficial ingredients for crops, and can be used for farmland irrigation. Returning the biogas slurry to the field for flood irrigation will pollute the environment of the planting area and the irrigation efficiency is low. Therefore, before using the mixed biogas slurry to irrigate the farmland, it is necessary to treat the mixed biogas slurry to make the content of COD and SS in the mixed...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCC02F9/00C02F1/001C02F1/36C02F1/24C02F1/52C02F1/54C02F1/5236C02F1/5281
Inventor 梁立军周华赟刘毅
Owner 常州思特恩节能科技有限公司
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