Dry type anaerobic fermentation biogas slurry solid-liquid separation system and dry type anaerobic fermentation biogas slurry solid-liquid separation method for fruit and vegetable garbage

Abstract

The invention relates to a dry type anaerobic fermentation biogas slurry solid-liquid separation system and a dry type anaerobic fermentation biogas slurry solid-liquid separation method for fruit and vegetable garbage. The system comprises a mechanical grid, a cyclone sand precipitator, a flocculation pool and a centrifugal dewatering machine, wherein the mechanical grid is connected to the pipeline of the cyclone sand precipitator, the sewage outlet of the cyclone sand precipitator is connected to the pipeline of the flocculation pool, and the water outlet of the flocculation pool is connected to the pipeline of the centrifugal dewatering machine. The method comprises that S1 biogas slurry passes through the mechanical grid to intercept the large-block impurities in the biogas slurry; S2, the obtained biogas slurry flows into the cyclone sand precipitator, and is subjected to sand removal; S3, the sand removed biogas slurry is mixed with an agent through a tubular mixer, and the uniformly mixed biogas slurry is flocculated in the flocculation pool to form large-block suspended matters; and S4, the flocculated biogas slurry is conveyed to the centrifugal dewatering machine, and is dewatered, and the dewatered biogas slurry is temporarily stored in a biogas slurry pool, and then is sucked out by a pump.

Description

technical field [0001] The invention relates to the technical field of biogas slurry solid-liquid separation, in particular to a system and method for dry-type anaerobic fermentation biogas slurry solid-liquid separation of fruit and vegetable garbage. Background technique [0002] Biogas slurry is the leachate produced by the fermentation of organic matter. It is rich in various amino acids, vitamins, proteins, auxins, sugars, nucleic acids, and antibiotics. It can be used as a high-quality liquid organic fertilizer instead of chemical fertilizers. The dry anaerobic fermentation system has a high solid content and complex composition of raw materials, resulting in a large amount of solid content, debris, and sand in the biogas slurry after fermentation. However, many crops are irrigated by drip irrigation. Too much SS in the biogas slurry will lead to nozzle blockage and other problems. The concentration of the biogas slurry restricts its application in sprinkler irrigation...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a dry-type anaerobic fermentation biogas slurry solid-liquid separation system and method for fruit and vegetable garbage, which solves the problem of the previous biogas slurry solid-liquid separation system and method directly centrifuging solid-liquid Separation can easily lead to pump blockage and equipment wear and tear

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