Household garbage degradation recycling and reusing equipment and process

Abstract

The utility model relates to a kind of domestic waste degradation recycling equipment and process, and it relates to biomass resource application technical field.Pretreatment reaction pool outlet is connected with fermentation reaction pool by infusion pipeline, pretreatment reaction pool slag outlet is connected with first solid residue tank, fermentation reaction pool outlet is connected with separation tower, fermentation reaction pool slag outlet is connected with second solid residue tank, first solid residue tank is connected with second solid residue tank by residue conveying equipment, second solid residue tank is connected with collection tank, separation tower outlet is connected with collection tower, and separation tower waste outlet is connected with pretreatment reaction pool.Biomass chemical technology is used to recycle, degrade and reuse biomass resources in domestic waste, produce ethanol and degradable plastic, and acid and alkaline waste residue and waste liquid generated in industrial production are introduced into the domestic waste ethanol production technology process as catalyst and supplementary raw material, to achieve the effect of environmental protection and circular economy.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of domestic waste degradation recycling equipment and process, relate to biomass resource application technical field. BACKGROUND

[0002] The city domestic waste processing mainly uses landfill, composting, incineration and so on, wherein landfill technology occupies large area;Composting technology has the shortcomings of low degree of harmlessness with volume reduction and reduction;Using waste incineration technology, its reduction degree is high, but investment is huge.

[0003] Traditional garbage disposal methods have their own advantages and disadvantages, but at the same time, since the garbage is not well classified, mixed collection of garbage is often used, so when the garbage is disposed, it often causes secondary pollution to water and soil resources, resulting in high cost of garbage disposal. Most of the current city domestic waste disposal methods are not classified and reduced, but directly enter the final incineration and landfill link, so it is easy to cause serious pollution to the ecological environment, and also causes serious resource waste. In this process, not only can the recyclable resources be effectively utilized, but also some harmful substances can easily cause air, soil and water pollution and subsequent processing problems, which may cause harm to residents and ecological health, which is difficult to estimate. In order to improve the recycling effect of domestic waste and reduce the pollution caused in the process of garbage disposal, the existing technology uses the method of extracting and utilizing biomass resources in domestic waste, which can produce ethanol, xylose and lignin. However, the biomass raw material it can handle is relatively single, and when facing more and more complex city domestic waste, the processing difficulty is increasing, and the processing efficiency is decreasing, and the value produced is not proportional to the investment. SUMMARY

[0004] The present application aims to overcome the defects or deficiencies in the prior art, and provides a kind of domestic waste degradation recycling equipment and process, which can design wasteless recycling resource technology according to the environmental characteristics of different garbage landfill sites, not only can greatly improve the resource rate of domestic waste, but also can produce products with higher added value, so as to truly realize the effect of "changing waste into treasure".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a municipal solid waste degradation, recycling and reuse device, comprising a pretreatment reaction tank 3, a fermentation reaction tank 4, a first solid slag tank 5, a second solid slag tank 6, a separation tower 7, a collection tower 8, and a collection tank 9. The outlet of the pretreatment reaction tank 3 is connected to the fermentation reaction tank 4 via a liquid conveying pipe 11. The slag discharge port of the pretreatment reaction tank 3 is connected to the first solid slag tank 5. The outlet of the fermentation reaction tank 4 is connected to the separation tower 7. The slag discharge port of the fermentation reaction tank 4 is connected to the second solid slag tank 6. The first solid slag tank 5 is connected to the second solid slag tank 6 via a residue conveying device 12. The second solid slag tank 6 is connected to the collection tank 9. The outlet of the separation tower 7 is connected to the collection tower 8. The waste discharge port of the separation tower 7 is connected to the pretreatment reaction tank 3.

[0006] The pretreatment reaction tank 3 includes ultrasonic treatment equipment, a weak base or weak acid catalyst, and a microbial degradation equipment.

[0007] The fermentation reaction tank 4 is an enzyme hydrolysis fermentation reaction tank.

[0008] The first solid waste pool 5 is a plastic waste pool.

[0009] The second solid slag tank 6 is a by-product sedimentation tank.

[0010] The collection tower 8 is an ethanol collection tower.

[0011] The working principle of the present application is as follows: the household garbage is simply classified and recycled in the classification recycling device 1, and is transported to the raw material yard 2; the classified household garbage and the alkaline waste residue liquid containing cellulose are used as raw materials, and are transported from the raw material yard 2 to the pretreatment reaction tank 3 through the raw material conveying device 10; different pretreatment schemes are adopted for different types of garbage: ultrasonic wave, weak alkali or weak acid catalyst, microbial degradation; near-critical water composite pretreatment is adopted in the pretreatment process, so that the wood fiber raw material in the household garbage is decomposed into liquefied or liquid biomass cellulose, hemicellulose and lignin; some residues are also generated in the pretreatment process, and the main component of the solid-state residue is plastic, and a small amount of inorganic matter such as enriched salt and dust; the residue is transported to the first solid residue tank 5, and the plastic residue is left for purification to generate plastic products; the inorganic matter residue such as enriched salt and dust is transported to the second solid residue tank 6; the liquefied or liquid biomass cellulose, hemicellulose and lignin are transported to the fermentation reaction tank 4, and enzyme hydrolysis is carried out in the fermentation reaction tank 4, the main purpose of which is to hydrolyze the cellulose into monosaccharide, and to simultaneously saccharify and ferment the sugar into alcohol, so that ethanol is generated by fermentation; lactic acid bacteria and / or yeast are added in different batches at the beginning, middle and end of the fermentation process, so as to adjust the production ratio of ethanol and lactic acid, so as to achieve the optimal resource utilization effect of simultaneously producing ethanol and lactic acid; the ethanol mixed liquid and polylactic acid, i.e. the ethanol mixed liquid and degradable biological plastic, are finally generated in the fermentation reaction tank 4; the ethanol mixed liquid is transported to the separation tower 7 for rectification to obtain ethanol and waste liquid; the ethanol is collected to the collection tower 8, and the waste liquid is recycled to the pretreatment reaction tank 3; the polylactic acid generated in the fermentation reaction tank 4 is separated from the ethanol mixed liquid and is transported to the second solid residue tank 6; low-cost intermediate raw materials are added, and high-value biofuels and chemicals are generated through liquid-phase catalysis, which are uniformly recycled to the collection tank 9. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0013] Fig. 1 is a structural framework diagram of the present application;

[0014] Fig. 2 is a process flow diagram of the present application.

[0015] Marked explanation: classification recycling device 1, raw material yard 2, pretreatment reaction tank 3, fermentation reaction tank 4, first solid residue tank 5, second solid residue tank 6, separation tower 7, collection tower 8, collection tank 9, raw material conveying device 10, liquid conveying pipeline 11, residue conveying device 12. DETAILED DESCRIPTION

[0016] SUMMARY Figs. 1-2 As shown in the drawings, the technical solution adopted in the present embodiment is: a household garbage degradation recycling equipment, which comprises a pretreatment reaction tank 3, a fermentation reaction tank 4, a first solid residue tank 5, a second solid residue tank 6, a separation tower 7, a collection tower 8, and a collection tank 9. The liquid outlet of the pretreatment reaction tank 3 is connected to the fermentation reaction tank 4 through a liquid conveying pipeline 11. The residue discharge port of the pretreatment reaction tank 3 is connected to the first solid residue tank 5. The liquid outlet of the fermentation reaction tank 4 is connected to the separation tower 7. The residue discharge port of the fermentation reaction tank 4 is connected to the second solid residue tank 6. The first solid residue tank 5 is connected to the second solid residue tank 6 through a residue conveying device 12. The second solid residue tank 6 is connected to the collection tank 9. The liquid outlet of the separation tower 7 is connected to the collection tower 8. The waste discharge port of the separation tower 7 is connected to the pretreatment reaction tank 3.

[0017] Further, the pretreatment reaction tank 3 comprises an ultrasonic treatment device, a weak alkali or weak acid catalyst, and a microbial degradation device.

[0018] Further, the fermentation reaction tank 4 is an enzyme hydrolysis fermentation reaction tank.

[0019] Further, the first solid residue tank 5 is a plastic residue tank, and the second solid residue tank 6 is a byproduct residue tank.

[0020] Further, the collection tower 8 is an ethanol collection tower.

[0021] A household garbage degradation recycling process comprises the following steps:

[0022] Step one: The household garbage is simply classified and recycled in a classification recycling device 1 and then transported to a raw material yard 2.

[0023] Step two: The classified household garbage and the alkali residue liquid containing cellulose are used as raw materials and transported from the raw material yard 2 to the pretreatment reaction tank 3 through a raw material conveying device 10. Different pretreatment schemes are adopted for different types of garbage, including ultrasonic treatment, weak alkali or weak acid catalyst, and microbial degradation. Near-critical water composite pretreatment is adopted in the pretreatment process, so as to decompose the wood fiber raw material in the household garbage into cellulose, hemicellulose, and lignin.

[0024] Step three: The liquid cellulose, hemicellulose, and lignin are conveyed to the fermentation reaction tank 4 through a liquid conveying pipeline 11. The remaining solid residue mainly comprises plastic and some enriched salt and dust inorganic matter residues. The plastic residue is conveyed to the first solid residue tank 5, and the enriched salt and dust inorganic matter residues are conveyed to the second solid residue tank 6 through a residue conveying device 12. The enriched salt and dust inorganic matter are used as raw materials for producing building materials.

[0025] Step four, enzyme hydrolysis is carried out in the fermentation reaction tank 4, and simultaneous saccharification and fermentation of the sugar into alcohol is carried out;

[0026] Step five, lactic acid bacteria and / or yeast are added in different batches at the beginning, middle and end of the fermentation process according to the needs of by-products, so as to adjust the production ratio of ethanol and lactic acid, so as to achieve the optimal resource utilization effect of simultaneously producing ethanol and lactic acid;

[0027] Step six, the final ethanol mixture and polylactic acid in the fermentation reaction tank 4, i.e. the ethanol mixture and biodegradable plastic, are generated, the ethanol mixture is transported to the separation tower 7 for rectification to obtain ethanol and waste liquid, the ethanol is collected to the collection tower 8, and the waste liquid is recycled to the pretreatment reaction tank 3;

[0028] Step seven, after the polylactic acid and the ethanol mixture generated in the fermentation reaction tank 4 are separated, they are transported to the second solid residue tank 6, low-cost intermediate raw materials are added, high-value biofuels and chemicals are generated through liquid phase catalysis, and they are recycled to the collection tank 9;

[0029] Step eight, the plastic raw materials in the first solid residue tank 5 are simply purified to generate plastic products.

[0030] After the above technical scheme is adopted, the present application has the beneficial effects that: through biomass chemical technology, the biomass resources in household garbage are recycled, degraded and reused to produce ethanol and biodegradable plastic, and the acid and alkaline waste residues and waste liquid generated in industrial production are introduced into the household garbage ethanol production technology process as catalysts and supplementary raw materials, so as to realize the effects of environmental protection and circular economy.

[0031] The above description is only used to explain the technical scheme of the present application but not limit the present application, and other modifications or equivalent replacements to the technical scheme of the present application made by those skilled in the art should be covered in the scope of claims of the present application, as long as they do not deviate from the spirit and scope of the present application.

Claims

1. A household garbage degradation recycling process, characterized in that: a household garbage degradation recycling equipment is used, which comprises a pretreatment reaction tank (3), a fermentation reaction tank (4), a first solid residue tank (5), a second solid residue tank (6), a separation tower (7), a collection tower (8), and a collection tank (9); the liquid outlet of the pretreatment reaction tank (3) is connected with the fermentation reaction tank (4) through a liquid conveying pipeline (11); the residue discharge port of the pretreatment reaction tank (3) is connected with the first solid residue tank (5); the liquid outlet of the fermentation reaction tank (4) is connected with the separation tower (7); the residue discharge port of the fermentation reaction tank (4) is connected with the second solid residue tank (6); the first solid residue tank (5) is connected with the second solid residue tank (6) through a residue conveying device (12); the second solid residue tank (6) is connected with the collection tank (9); the liquid outlet of the separation tower (7) is connected with the collection tower (8); and the waste discharge port of the separation tower (7) is connected with the pretreatment reaction tank (3). The household garbage degradation recycling process comprises the following steps: Step one: the household garbage is simply classified and recycled in a classification recycling device (1) and is transported to a raw material yard (2); Step two: the classified household garbage and the alkali-containing residue and waste liquid containing cellulose are used as raw materials, which are transported from the raw material yard (2) to the pretreatment reaction tank (3) through a raw material conveying device (10); different pretreatment schemes are used for different types of garbage, including ultrasonic wave, weak alkali or weak acid catalyst, and microbial degradation; near-critical water composite pretreatment is used in the pretreatment process, so that the wood fiber raw material in the household garbage is decomposed into cellulose, hemicellulose, and lignin; Step three: the liquid cellulose, hemicellulose, and lignin are conveyed to the fermentation reaction tank (4) through the liquid conveying pipeline (11); the remaining solid residue mainly contains plastic and some enriched salts and dust; the plastic sediment is conveyed to the first solid residue tank (5); the enriched salts and dust are conveyed to the second solid residue tank (6) through the residue conveying device (12); and the inorganic substances such as the enriched salts and dust are used as raw materials to produce building materials; Step four: enzyme hydrolysis is carried out in the fermentation reaction tank (4) to simultaneously saccharify and ferment the sugar into alcohol; Step five: according to the demand for by-products, lactic acid bacteria and / or yeast are added in different batches at the beginning, middle, and end of the fermentation process to adjust the production ratio of ethanol and lactic acid, so as to achieve the optimal resource utilization effect of simultaneously producing ethanol and lactic acid; Step six: the final ethanol mixture and polylactic acid generated in the fermentation reaction tank (4) are separated, i.e., the ethanol mixture and the degradable bioplastic; the ethanol mixture is conveyed to the separation tower (7) for rectification to obtain ethanol and waste liquid; the ethanol is collected in the collection tower (8); and the waste liquid is recycled to the pretreatment reaction tank (3); Step seven: after the polylactic acid and the ethanol mixture generated in the fermentation reaction tank (4) are separated, they are conveyed to the second solid residue tank (6); low-cost intermediate raw materials are added; high-value biofuels and chemicals are generated through liquid-phase catalysis; and they are uniformly recycled to the collection tank (9); Step eight: the plastic raw materials in the first solid residue tank (5) are simply purified to generate plastic products. ​ 2. The household garbage degradation recycling process according to claim 1, characterized in that: The pretreatment reaction tank (3) comprises ultrasonic treatment equipment, weak alkali or weak acid catalyst, and microbial degradation equipment.

3. The household garbage degradation recycling process according to claim 1, characterized in that: The fermentation reaction tank (4) is an enzyme hydrolysis fermentation reaction tank.

4. The household garbage degradation recycling process according to claim 1, characterized in that: The first solid residue tank (5) is a plastic residue tank.

5. The household garbage degradation recycling process according to claim 1, characterized in that: The second solid residue tank (6) is a byproduct sedimentation tank.

6. The household garbage degradation recycling process according to claim 1, characterized in that: The collection tower (8) is an ethanol collection tower.

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