CN106111671A - House refuse and changing food waste cooperative processing method - Google Patents

Abstract

The invention discloses one way of life rubbish and changing food waste cooperative processing method, in domestic garbage treatment plant or changing food waste treatment plant, all can both process house refuse, it is possible to collaborative process changing food waste.After house refuse is mixed in feed bin by domestic garbage treatment plant with changing food waste, it is separated into dry rubbish and wet refuse by separating dry space from moist space system, the dry rubbish separated is used as the raw material of burning electricity generation, the wet refuse separated is used as dry type anaerobism producing methane or makes the raw material of compost；Changing food waste treatment plant by changing food waste with mixed in feed bin by the isolated wet refuse of separating dry space from moist space system in domestic garbage treatment plant after, it is separated into solid refuse and serosity by solid-liquid separation system, the solid refuse separated is used as the raw material of domestic garbage treatment plant burning electricity generation, the serosity separated is used as the raw material of wet type anaerobism producing methane.The method makes full use of conventional garbage treatment plant process equipment, has treatment effeciency high, processes technique simple, the advantages such as processing cost is low.

Description

Collaborative treatment method of domestic waste and kitchen waste

technical field

The invention relates to the field of solid waste treatment, in particular to a method for co-processing domestic waste and kitchen waste.

Background technique

At present, many cities have established two separate waste collection and transportation systems: one is for domestic waste in residential areas, and has established a domestic waste treatment plant; the other is for restaurants, restaurants and canteens. Kitchen waste treatment plant. In the same city, it is often necessary to build these two waste collection and transportation systems, which not only requires a huge investment, but also tends to cause low-quality waste or insufficient supply in actual operation, which is not conducive to improving the effect of waste treatment and reducing treatment costs.

The Chinese patent "Method for Cooperative Disposal of Municipal Solid Waste" with publication number CN104668270A provides a method for co-processing municipal solid waste, that is, mixing kitchen waste sieves and dried sludge into domestic waste for incineration treatment , integrate and co-dispose a variety of urban solid wastes, and achieve the purpose of resource recycling through the rational use of flue gas. However, the processing process is complicated: the food waste needs to be pretreated, and the oversize is taken after natural settlement, bag breaking and sieving; the oversize of the food waste needs to be stirred and leached after being mixed with domestic waste.

Publication No. 102887736A's Chinese patent "Method for Making Special Fertilizer by Simultaneous Treatment of Food Waste and Sludge and Household Waste" provides a method for synergistic processing of food waste, sludge and house waste. After the solid impurities are crushed, the slurry, sludge and water of the kitchen waste enter the refining and beating machine to be mixed to make a fine homogenate, and then the organic fertilizer is prepared through several steps. However, domestic waste must be sorted out of solid organic matter, and food waste also needs to be pretreated, and a large amount of dilution water is added. The treatment process is complicated and can only be used to make a single product of organic fertilizer.

In addition, the Chinese patent of publication number CN103381420A "A comprehensive treatment device and method for collaborative resource utilization of sewage" is only applicable to the collaborative treatment of kitchen waste, landscaping waste and urban municipal sludge; Cooperative processing method of kitchen waste" only uses the waste heat steam in the waste incineration power plant as the heat source for the fermentation of food waste, and at the same time, the sundries and biogas residues generated in the pretreatment step are sent to the waste incineration power plant for incineration.

It can be seen that the existing technology has strong limitations, narrow application areas, and the process is too complicated, and cannot solve the problem of efficient and coordinated processing of domestic waste and kitchen waste.

Contents of the invention

Based on the problems existing in the above-mentioned prior art, the present invention provides a method for synergistic treatment of domestic waste and kitchen waste, which can efficiently and cooperatively process domestic waste and kitchen waste, avoiding repeated construction of facilities, complicated pretreatment process, and high treatment cost and shortage of raw materials. .

In order to solve the above technical problems, the present invention provides a co-processing method of domestic waste and kitchen waste, comprising the following steps:

When domestic waste treatment plants co-process food waste, after mixing domestic waste and food waste in the silo, they are separated into dry waste and wet waste through a dry-wet separation system, and the separated dry waste is used for incineration Raw materials for power generation, using the separated wet garbage as raw materials for dry anaerobic biogas production or composting;

When the food waste treatment plant co-processes domestic waste, the food waste and the wet waste separated by the dry-wet separation system in the domestic waste treatment plant are mixed in the silo, and then separated into solid waste and slurry by the solid-liquid separation system , using the separated solid waste as a raw material for incineration power generation in a domestic waste treatment plant, and using the separated slurry as a raw material for wet anaerobic biogas production.

The beneficial effects of the present invention are: through the method of the present invention, it is no longer necessary for every city and county to simultaneously build a domestic waste treatment and disposal plant and a kitchen waste treatment plant, and all the garbage can be processed in the domestic waste treatment plant. Under this treatment method, there is no need to have "quality" and "quantity" constraints on the food waste collected and transported; for the food waste treatment plants that have been built, it is also possible to process the food waste after the dry-wet separation of domestic waste. Composition-based wet garbage, which can solve the shortage of raw materials in kitchen waste treatment plants; the planning and arrangement of co-processing kitchen waste and domestic waste in the present invention provides an economically feasible and effective model.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic flowchart of a processing method provided by an embodiment of the present invention.

detailed description

The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, an embodiment of the present invention provides a method for co-processing domestic waste and kitchen waste, including the following steps:

When domestic waste treatment plants co-process food waste, after mixing domestic waste and food waste in the silo, they are separated into dry waste and wet waste through a dry-wet separation system, and the separated dry waste is used for incineration Raw materials for power generation, using the separated wet garbage as raw materials for dry anaerobic biogas production or composting;

When the food waste treatment plant co-processes domestic waste, the food waste and the wet waste separated by the dry-wet separation system in the domestic waste treatment plant are mixed in the silo, and then separated into solid waste and slurry by the solid-liquid separation system , using the separated solid waste as a raw material for incineration power generation in a domestic waste treatment plant, and using the separated slurry as a raw material for wet anaerobic biogas production.

In the above treatment method, the weight ratio of domestic waste and kitchen waste is any proportion.

In the above treatment method, the moisture content of the dry garbage separated by the dry-wet separation system is lower than 40%, and the moisture content of the separated wet garbage is higher than 70%.

In the above treatment method, the water content of the solid waste separated by the solid-liquid separation system is lower than 50%, and the water content of the separated slurry is higher than 80%.

The present invention will be further described below in conjunction with specific embodiment

As shown in Figure 1, if domestic waste and kitchen waste are co-processed in the domestic waste treatment plant, the domestic waste and kitchen waste are transported to the domestic waste treatment plant separately, and they are all placed in the same silo. The proportion is not limited, and can be mixed in any proportion. The mixed material is transported to the dry-wet separation system for dry-wet separation, and is separated into dry garbage and wet garbage. Among them, the moisture content of dry garbage is lower than 40%, which has a relatively high calorific value, and it is transported to the incineration power plant for incineration to generate electricity; the wet garbage is mainly organic matter in the kitchen, with a moisture content higher than 70%, and a high organic matter content, suitable for It can be used for dry anaerobic biogas production or composting, and can also be transported to the food waste treatment plant for treatment.

For example, domestic waste and kitchen waste are co-processed in the food waste treatment plant, and the specially collected food waste and wet waste generated by the dry-wet separation system of the domestic waste treatment plant are also placed in the same silo. Its weight ratio is also not limited, and can be mixed in any ratio, and the mixed material is separated into solid waste and slurry through a solid-liquid separation system. Among them, the moisture content of solid waste is lower than 50%, has a certain calorific value, and can be used as raw material for waste incineration power plants; the moisture content of slurry is higher than 80%, and the organic matter content is high, which is suitable for use as raw material for wet anaerobic biogas production .

The processing method of the present invention makes it possible to process domestic waste and cooperatively process kitchen waste in the domestic waste treatment plant, and to process both food waste and cooperatively process domestic waste in the kitchen waste treatment plant. The treatment method of the present invention fully utilizes the process equipment of the existing garbage treatment plant to co-process domestic garbage and kitchen garbage, and has the advantages of high treatment efficiency, simple treatment process, and low treatment cost.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (4)

1. one way of life rubbish and changing food waste cooperative processing method, it is characterised in that comprise the following steps:

When domestic garbage treatment plant collaborative process changing food waste, after house refuse is mixed in feed bin with changing food waste, logical Cross separating dry space from moist space system and be separated into dry rubbish and wet refuse, isolated described dry rubbish is used as the raw material of burning electricity generation, will Isolated described wet refuse is used as dry type anaerobism producing methane or makes the raw material of compost；

When changing food waste treatment plant collaborative process house refuse, changing food waste is divided by dry and wet in domestic garbage treatment plant After the isolated wet refuse of system mixes in feed bin, it is separated into solid refuse and serosity by solid-liquid separation system, will divide The described solid refuse separated out is used as the raw material of domestic garbage treatment plant burning electricity generation, and isolated described serosity is used as wet type The raw material of anaerobism producing methane.

House refuse the most according to claim 1 and changing food waste cooperative processing method, it is characterised in that described life rubbish Rubbish is arbitrary proportion with the weight proportion of changing food waste.

House refuse the most according to claim 1 and changing food waste cooperative processing method, it is characterised in that described dry and wet is divided Moisture content from the isolated dry rubbish of system is less than 40%, and the moisture content of isolated wet refuse is higher than 70%.

House refuse the most according to claim 1 and changing food waste cooperative processing method, it is characterised in that described solid-liquid divides Moisture content from the isolated solid refuse of system is less than 50%, and isolated serosity moisture content is higher than 80%.