A sand removal and homogenization device suitable for anaerobic fermentation slurry and its process

Abstract

The invention discloses a desanding and homogenizing device suitable for anaerobic fermentation slurry and its process, comprising a desanding tank (4), above which a driving device (1) is arranged, and a transmission shaft is connected under the driving device (1) (2), the transmission shaft (2) is provided with a swirling flow stirring paddle (5), and the swirling flow stirring paddle (5) is located in the middle of the desanding tank (4), and the top of the desandering tank (4) is connected with the The feed port (3) of the material valve group (17) is connected, and the center of the bottom of the sand removal tank (4) is provided with a filter screen (16), and the filter screen (16) is provided with a screen cleaner (6 ); the bottom of the filter screen (16) is provided with a slurry outlet (10) with a discharge valve group (12), and the rear end of the slurry outlet (10) is connected to the cyclone desanding section (20) by a pump (28) ), the cyclone desanding section (20) communicates with the sand removal tank (4) through the upper discharge port (23) and the return valve (26), and there is a Bypass with drain valve (27).

Description

technical field [0001] The invention relates to the technical field of kitchen waste homogenization and sand removal, in particular to a device and process for removing sand and pulping by utilizing high-concentration and high-fat organic wastewater before anaerobic fermentation. Background technique [0002] Anaerobic fermentation is a process of biodegrading organic matter under the condition of isolation from contact with air, relying on the biochemical action of facultative anaerobic bacteria and obligate anaerobic bacteria; improving the pulping quality of anaerobic fermentation and ensuring that the Impurities, especially those with a density (kg per cubic meter) greater than water, such as sand and gravel, can be removed to ensure the long-term stable operation of the anaerobic fermentation reactor, reduce the corrosion damage in the reactor tank, and reduce the effective volume of the tank. And pipeline blockage, prolong the service life of anaerobic fermentation rea...

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Problems solved by technology

[0004] The high-concentration sand-containing organic wastewater discharged from the kitchen waste leachate after preliminary separation contains denser substances such as fine sand, egg shells, broken glass, and bone ballast. And the delivery pump has a lot of wear and tear, which causes the pipeline to be easily blocked. At the same time, the particle size of organic matter is too large or too large, which will cause the accumulation of impurities in the anaerobic fermentation tank and reduce the volume, and the anaerobic biogas production rate at the back end will decrease or the risk of tank cleaning and shutdown.

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