CN111872048A - A kind of wet garbage humidity control fermentation power generation system and process - Google Patents

Abstract

The invention discloses a wet garbage humidity control fermentation power generation system and a process. The system includes wet garbage humidity control equipment, anaerobic fermentation equipment and an incineration power generation boiler; the wet garbage space of the wet garbage humidity control equipment is connected to the wet garbage source, and the wet garbage adjustment The garbage outlet of the wet equipment is connected to the garbage inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, the flue gas outlet of the incineration power generation boiler is connected to the flue gas inlet of the wet garbage humidity control equipment, and the wet garbage humidity control The flue gas outlet of the equipment is connected to the flue gas inlet of the anaerobic fermentation equipment. The process is: heating the wet garbage to adjust the humidity to remove part of the water in the wet garbage, then anaerobic fermentation of the wet garbage after humidity adjustment, incineration of the biogas after anaerobic fermentation to generate electricity, and the flue gas of the incineration power generation to the wet garbage. The temperature of anaerobic fermentation is adjusted by using the flue gas after humidity adjustment.

Description

A kind of wet garbage humidity control fermentation power generation system and process

technical field

The invention relates to the technical field of wet garbage disposal, in particular to a wet garbage humidity control fermentation power generation system and process.

Background technique

The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

my country has a large population and complex eating habits. The amount of garbage generated is huge and the water content of the garbage is also very large. With the implementation of garbage classification in my country, garbage is divided into recyclable garbage, dry garbage, wet garbage and hazardous garbage. Among them, wet waste refers to also known as kitchen waste, organic waste, or perishable waste, which refers to food waste, leftovers, expired food, melon peel and fruit pits, flowers and green plants, traditional Chinese medicine dregs and other perishable raw materials. Material domestic waste. At present, household kitchens, restaurants, restaurants, canteens, markets and other industries related to food processing are the main sources of wet waste. According to the research of the inventors of the present invention, it is found that the classified wet waste has a higher water content. The amount of wet garbage is huge. If it is not disposed of in time, it will produce serious odors, breed bacteria, and eventually pollute the environment. The fastest way to dispose of large amounts of wet waste is incineration. However, through further research by the inventors of the present invention, it is found that when such wet waste is used for incineration to generate electricity, the water content will limit the utilization efficiency and power generation of the boiler.

SUMMARY OF THE INVENTION

In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a wet waste humidity control fermentation power generation system and process, which can avoid the problem of limiting the utilization efficiency and power generation of the boiler existing in the wet waste incineration power generation, and has the advantages of energy saving, high efficiency, environmental protection, High energy utilization characteristics.

In order to achieve the above object, the technical scheme of the present invention is:

On the one hand, a wet waste humidity control and fermentation power generation system includes wet waste humidity control equipment, anaerobic fermentation equipment and an incineration power generation boiler;

The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space, and the flue gas channel and the wet garbage space make the flue gas indirectly contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage;

The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas indirectly contact with the fermentation raw materials, and realize the use of the low-temperature waste heat of the flue gas to adjust the fermentation temperature;

The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device.

On the other hand, a wet waste conditioning and fermentation power generation process, the wet waste is heated and humidified to remove part of the water in the wet waste, and then the wet waste after humidity conditioning is subjected to anaerobic fermentation, and the biogas after anaerobic fermentation is subjected to anaerobic fermentation. Incineration power generation, the flue gas of incineration power generation is used to heat the wet garbage and adjust the humidity, and the flue gas after humidity adjustment is used to adjust the temperature of anaerobic fermentation.

The beneficial effects of the present invention are:

1. The present invention utilizes high-temperature flue gas to adjust the humidity of wet garbage, so that the humidity of wet garbage can reach the most suitable humidity for anaerobic fermentation, and uses low-temperature flue gas to promote anaerobic fermentation, shorten fermentation time, and increase fermentation products. The waste heat of the flue gas is fully utilized, which greatly improves the utilization rate of energy.

2. The present invention utilizes the biogas and biogas residues from the anaerobic fermentation of garbage to generate electricity, which is environmentally friendly, energy-saving and efficient.

3. In the present invention, the humidity of garbage can be adjusted through the humidity control device, so that the humidity is most suitable for the fermentation of garbage bacteria.

4. In the present invention, the biogas slurry produced by anaerobic fermentation can be collected and used as fertilizer, feed, and control of diseases and insect pests.

5. The biogas residue produced by the anaerobic fermentation of the present invention can not only be used for incineration in boilers to generate electricity, but also can be used as chemical fertilizer.

6. The wet garbage of the present invention does not directly incinerate to generate electricity after dehumidification, and uses it to ferment to produce biogas with better quality, which is beneficial to improve resource utilization.

Description of drawings

The accompanying drawings forming a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation of the present invention.

Fig. 1 is the process flow diagram of the wet garbage humidity control fermentation power generation of the present invention;

Among them, 1. Wet garbage storage, 2. Wet garbage humidity control equipment, 3. Garbage with suitable humidity, 4. Anaerobic fermentation equipment, 5. Biogas, 6. Incineration boiler, 7. High temperature flue gas, 8. Low temperature flue gas , 9, flue gas, 10, biogas slurry, 11, biogas residue.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

In view of the problems of low utilization efficiency and low power generation of boilers caused by direct incineration of wet waste for power generation, the present invention proposes a system and process for power generation by humidity control and fermentation of wet waste.

A typical embodiment of the present invention provides a wet waste humidity control and fermentation power generation system, including wet waste humidity control equipment, anaerobic fermentation equipment and an incineration power generation boiler;

The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space. The flue gas channel and the wet garbage space make the flue gas indirectly contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage, and the smoke is avoided at the same time. Gas mixed with water vapor and garbage odor;

The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas indirectly contact with the fermentation raw materials, and realize the use of the low-temperature waste heat of the flue gas to adjust the fermentation temperature;

The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device.

In one or more examples of this embodiment, the biogas residue outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler.

In one or more examples of this embodiment, a biogas slurry collection tank is included, and the biogas slurry outlet of the anaerobic fermentation equipment is connected to the biogas slurry collection tank.

In one or more examples of this embodiment, a fertilizer preparation device is included, and the biogas slurry outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device.

In one or more examples of this embodiment, a fertilizer preparation device is included, and the biogas residue outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device.

Another embodiment of the present invention provides a process for generating electricity by humidity control and fermentation of wet waste. The wet waste is heated and humidified to remove part of the water in the wet waste. The biogas after anaerobic fermentation is incinerated for power generation, the flue gas from incineration and power generation is used to heat the wet garbage and adjust the humidity, and the flue gas after humidity adjustment is used to adjust the temperature of anaerobic fermentation.

In one or more examples of this embodiment, the wet garbage is adjusted to a humidity of 24-40% for anaerobic fermentation.

In one or more embodiments of this embodiment, the biogas residue after anaerobic fermentation is incinerated to generate electricity.

In one or more embodiments of this embodiment, the anaerobic fermentation of the digestate is used for fertilizer production.

In one or more examples of this embodiment, the biogas slurry after anaerobic fermentation is used for fertilizer production.

In order to enable those skilled in the art to understand the technical solutions of the present invention more clearly, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.

Example 1

A wet garbage humidity control fermentation power generation system includes wet garbage humidity control equipment, anaerobic fermentation equipment, an incineration power generation boiler, and a biogas slurry collection tank.

The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space. The flue gas channel and the wet garbage space make the flue gas come into indirect contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage.

The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas come into indirect contact with the fermentation raw materials, so that the low-temperature waste heat of the flue gas can be used to adjust the fermentation temperature.

The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device.

The biogas residue outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler.

The biogas slurry outlet of the anaerobic fermentation equipment is connected to the biogas slurry collection tank.

The wet waste humidity control fermentation power generation process, as shown in Figure 1, the process includes:

1. Garbage process: the wet garbage transported by the garbage truck is first stored in the wet garbage warehouse 1, and then transported to the wet garbage humidity conditioning equipment 2, adjust the temperature to 60 ℃ for humidity adjustment, and then adjust the humidity to the appropriate (24-40%) The waste is transported to the anaerobic fermentation equipment 4 for anaerobic fermentation.

2. Biogas process: The biogas 5 produced by the anaerobic fermentation 4 is collected, and then enters the incineration boiler 6 for incineration and power generation.

3. Biogas residue process: The biogas residue 11 produced by the anaerobic fermentation 4 is sent to the incineration boiler 6 for incineration and power generation.

4. Biogas slurry process: The biogas slurry 10 produced by the anaerobic fermentation 4 is collected and reused.

5. Flue gas process: The high temperature flue gas 7 (~200℃) generated by the boiler incineration power generation 6 enters the wet garbage humidity control equipment, and after cooling down, it becomes a low temperature flue gas 8 (~100℃), and then enters the garbage storage to promote the waste to be depleted. oxygen fermentation.

Example 2

A wet garbage humidity control fermentation power generation system includes wet garbage humidity control equipment, anaerobic fermentation equipment, an incineration power generation boiler, a biogas slurry collection tank, and a fertilizer preparation device.

The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space. The flue gas channel and the wet garbage space make the flue gas come into indirect contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage.

The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas come into indirect contact with the fermentation raw materials, so that the low-temperature waste heat of the flue gas can be used to adjust the fermentation temperature.

The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device.

The biogas residue outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device.

The biogas slurry outlet of the anaerobic fermentation equipment is connected to the biogas slurry collection tank.

Example 3

A wet garbage humidity control fermentation power generation system includes wet garbage humidity control equipment, anaerobic fermentation equipment, an incineration power generation boiler, a biogas slurry collection tank, and a fertilizer preparation device.

The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space. The flue gas channel and the wet garbage space make the flue gas come into indirect contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage.

The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas come into indirect contact with the fermentation raw materials, so that the low-temperature waste heat of the flue gas can be used to adjust the fermentation temperature.

The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device.

The biogas residue outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler.

The biogas slurry outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a wet garbage humidity control fermentation power generation system, is characterized in that, comprises wet garbage humidity control equipment, anaerobic fermentation equipment and incineration power generation boiler; The wet garbage humidity conditioning equipment is provided with a flue gas channel and a wet garbage space, and the flue gas channel and the wet garbage space make the flue gas indirectly contact with the wet garbage, so that the high temperature waste heat of the flue gas can be used to adjust the humidity of the wet garbage; The anaerobic fermentation equipment is provided with a flue gas channel and a fermentation space. The flue gas channel and the fermentation space make the flue gas indirectly contact with the fermentation raw materials, and realize the use of the low-temperature waste heat of the flue gas to adjust the fermentation temperature; The wet waste space of the wet waste humidity conditioning equipment is connected to the wet waste source, the waste outlet of the wet waste humidity conditioning equipment is connected to the waste inlet of the anaerobic fermentation equipment, the biogas outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler, and the smoke of the incineration power generation boiler is connected. The gas outlet is connected to the flue gas inlet of the wet waste humidity conditioning device, and the flue gas outlet of the wet waste humidity conditioning device is connected to the flue gas inlet of the anaerobic fermentation device. 2 . The wet waste humidity control and fermentation power generation system according to claim 1 , wherein the biogas residue outlet of the anaerobic fermentation equipment is connected to the fuel inlet of the incineration power generation boiler. 3 . 3. The wet waste humidity control and fermentation power generation system according to claim 1, characterized in that it comprises a biogas slurry collection tank, and the biogas slurry outlet of the anaerobic fermentation equipment is connected to the biogas slurry collection tank. 4 . The wet waste humidity control and fermentation power generation system according to claim 1 , wherein, it comprises a fertilizer preparation device, and the biogas slurry outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device. 5 . 5 . The wet waste humidity control and fermentation power generation system according to claim 1 , comprising a fertilizer preparation device, and the biogas residue outlet of the anaerobic fermentation equipment is connected to the fertilizer preparation device. 6 . 6. A process for power generation by humidity-conditioning and fermentation of wet waste, characterized in that the wet waste is heated and conditioned to remove part of the water in the wet waste, and then the wet waste after the humidity-conditioning is subjected to anaerobic fermentation, and the anaerobic fermentation The biogas is incinerated to generate electricity, the flue gas of the incineration and electricity generation is used to heat the wet garbage and adjust the humidity, and the flue gas after the humidity adjustment is used to adjust the temperature of anaerobic fermentation. 7 . The wet garbage humidity-adjusting fermentation power generation process according to claim 6 , wherein the wet garbage is adjusted to a humidity of 24-40% for anaerobic fermentation. 8 . 8. The wet waste humidity control fermentation power generation process according to claim 6, wherein the biogas residue after anaerobic fermentation is incinerated for power generation. 9 . The power generation process of wet waste humidity control and fermentation according to claim 6 , wherein the biogas residue after anaerobic fermentation is used for fertilizer production. 10 . 10 . The wet waste humidity control fermentation power generation process according to claim 6 , wherein the biogas slurry after anaerobic fermentation is used for fertilizer production. 11 .

Images