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Pretreatment method for preparing biomass fuel by using restaurant garbage

A technology for biomass fuel and kitchen waste, applied in the field of pretreatment, can solve problems such as inability to remove and complex components of kitchen waste, and achieve the effects of low cost, avoidance of damage and simple process

Inactive Publication Date: 2012-09-12
CHONGQING ACADEMY OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the extremely complex composition of kitchen waste, the existing pretreatment process and sorting equipment such as CN200810226945.X announced a pretreatment equipment suitable for ethanol fermentation of kitchen waste, which consists of oil-water separation device, feed liquid storage tank , homogeneous device, but the equipment can remove and recycle the coarser debris and grease, but cannot remove the finer hard debris (metal, ceramic glass, meat, bone, etc.)

Method used

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  • Pretreatment method for preparing biomass fuel by using restaurant garbage
  • Pretreatment method for preparing biomass fuel by using restaurant garbage
  • Pretreatment method for preparing biomass fuel by using restaurant garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]The food waste collected and transported to the treatment plant is dumped on the coarse grid of 60mm*60mm or φ60mm. The coarse grid here has a larger aperture and area to ensure that the garbage is spread and only intercepts coarse debris, such as iron and plastic. Bags (boxes, bottles), big bone sticks, cardboard, etc., manually select the coarse debris (or design the grille as an oblique grille, the bottom of the grille is connected to the belt conveyor, and the coarse debris is sent through the conveyor The post-processing procedure is a prior art, and will not be described in detail here). The sieved garbage enters the vacuum suction filter tank, the vacuum suction filter is turned on, the filtrate enters the oil-water separation tank, the solids are washed with hot water, and the rinse filtrate is merged into the oil-water separation tank. The solids are sent to the shearer through the screw feeder. The liquid phase is stirred and heated to 60-80°C in the oil-water...

Embodiment 2

[0031] Turn on the 80mm*80mm or φ80mm coarse grid separator, dump the food waste collected and transported to the treatment plant into the grid separation tank, and intercept coarse debris, such as ironware, plastic bags (boxes, bottles), and large bone sticks , cardboard, etc., are taken out with the grid transmission, fall into the belt conveyor and sent to the subsequent processing process, the sieved garbage enters the automatic discharge centrifuge, the centrate enters the oil and water tank, rinses the solids with hot water, and the rinse filtrate is combined into the Oil-water separation tank. The solids are sent to the shearer through the screw feeder. The liquid phase is stirred and heated to 60-80°C in the oil-water tank, sent to the oil-water separator for high-speed centrifugation, the water phase is sent to the shearer, the oil phase is recovered and reused, the shearer is turned on, the speed is adjusted to 800rmp, and the shearing is broken for 15mins Finally, ...

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Abstract

The invention discloses a pretreatment method for preparing biomass fuel by using restaurant garbage. The pretreatment method is completed according to the steps as follows: (1) bulk sundries are separated from the collected and conveyed restaurant garbage via a thick grid; (2) materials are separated into a liquid phase and solid matters through solid-liquid separation, the liquid phase is subject to oil-water separation, an oil phase is sold as a primary product and used for preparing biodiesel, and a water phase is mixed with the solid matters; (3) a mixture of the water phase and the solid matters is sent into a shearer, the materials are shorn into half-pasty matters in the shearer, and the sundries difficult to separate, such as meat, bones, metal, ceramic glass, fruit stones, and the like cannot be shorn; and (4) the meat, the bones, the metal, the ceramic glass, the fruit stones, and the like are separated from the pasty materials obtained in the step (3) via a thin grid, and the separated pasty materials are pulped and used for being biologically fermented to prepare ethanol or biogas. Not only can relative thick sundries and oil be removed, but the meat, the metal, the ceramic glass, the bones and the like which are relatively thin can be removed at the same time. Therefore, an energy regeneration treatment technology and energy regeneration treatment equipment are efficient, simple, economic and practical.

Description

technical field [0001] The invention belongs to a pretreatment method for kitchen waste, in particular to a pretreatment method for preparing biomass fuels such as biogas and ethanol by using kitchen waste. Background technique [0002] Kitchen waste, also known as hogwash, mainly comes from hotels, restaurants, canteens of enterprises and institutions, families, and catering industries. Its quantity is large and there are many impurities. The main components are starch, cellulose, protein, and lipids, and a small amount of lunch boxes are mixed at the same time. , chopsticks, tableware fragments, plastic bottles (bags), meat, bones and other sundries. Due to its high moisture content, high organic matter content, and high salt content, it is not suitable for incineration, landfills are prone to corruption and odor, and produce a large amount of leachate. The high salt content limits the application of compost. At present, there are some reports on food waste methane fermen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08C12P5/02
CPCY02E50/30Y02P20/10Y02P20/59
Inventor 郭东平袁康
Owner CHONGQING ACADEMY OF SCI & TECH