CN112856427A - Wet garbage fermentation gas pretreatment method - Google Patents
Wet garbage fermentation gas pretreatment method Download PDFInfo
- Publication number
- CN112856427A CN112856427A CN202011519725.3A CN202011519725A CN112856427A CN 112856427 A CN112856427 A CN 112856427A CN 202011519725 A CN202011519725 A CN 202011519725A CN 112856427 A CN112856427 A CN 112856427A
- Authority
- CN
- China
- Prior art keywords
- fermentation
- gas
- fermentation gas
- wet garbage
- garbage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
Abstract
The invention discloses a pretreatment method of wet garbage fermentation gas, which comprises the following steps: step one, removing inorganic impurities such as glass and metal from collected wet garbage through a sorting machine, then sending the wet garbage into a fermentation tank for centralized storage and anaerobic fermentation for 5-7 days, and controlling the temperature in the fermentation tank to be not more than 80 ℃; step two, pumping out gas generated in the fermentation process from a fermentation area through a draught fan; step three, sending the extracted fermentation gas into a steam-water separator, separating liquid drops in the fermentation gas, and then carrying out heat exchange and cooling on the fermentation gas from which the formed liquid drops are primarily removed through a water-cooling heat exchanger; and step five, feeding the dewatered fermentation gas into an incinerator through a blower to supplement combustion-supporting gas. Through the mode, the unit heat value of the fermentation gas entering the incinerator can be improved, the environment pollution caused by harmful gas generated in garbage disposal can be effectively prevented, meanwhile, combustion-supporting gas in incineration is partially replaced, and the power generation cost is reduced.
Description
Technical Field
The invention relates to the field of garbage power generation, in particular to a pretreatment method of wet garbage fermentation gas.
Background
In order to solve the problem, the general method is to ferment the wet garbage, generate combustible gas mainly containing methane during fermentation and simultaneously emit a large amount of heat, heat the wet garbage, evaporate a large amount of moisture in the wet garbage and mix the water with the combustible gas, and the mixed gas can cause local instability of the furnace temperature when being introduced into the incinerator.
Disclosure of Invention
The invention mainly solves the technical problem of providing a pretreatment method of wet garbage fermentation gas, which can reduce the content of water vapor in the fermentation gas and improve the combustion-supporting effect.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a wet garbage fermentation gas pretreatment method, which comprises the following steps:
step one, removing inorganic impurities such as glass and metal from the collected wet garbage through a sorting machine, and then sending the wet garbage into a fermentation tank for centralized storage and anaerobic fermentation for 5-7 days;
step two, pumping out gas generated in the fermentation process from a fermentation area through a draught fan;
step three, sending the extracted fermentation gas into a steam-water separator, separating liquid drops in the fermentation gas, and then carrying out heat exchange and cooling on the fermentation gas from which the formed liquid drops are primarily removed through a water-cooling heat exchanger;
and step five, feeding the dewatered fermentation gas into an incinerator through a blower to supplement combustion-supporting gas.
In a preferred embodiment of the invention, the condition for starting the induced draft fan in the second step is that the temperature of the fermentation tank exceeds 40 ℃.
In a preferred embodiment of the invention, the liquid separated in the steam-water separator in the third step is sent to a leachate collecting tank.
In a preferred embodiment of the invention, the heat exchange temperature of the water-cooled heat exchanger is not more than 15 ℃, and the temperature of the fermentation gas after heat exchange is not more than 25 ℃.
In a preferred embodiment of the present invention, after heat exchange by the water-cooled heat exchanger, the condensed water in the heat exchange pipeline is collected and sent to a leachate collection pool.
In a preferred embodiment of the present invention, before the fermentation gas enters the incinerator in the fifth step, solid particles are removed through a gas filter.
In a preferred embodiment of the invention, the solid particles filtered out by the gas filter are periodically cleaned and then sent into the fermented garbage to be incinerated together with the fermented garbage.
In a preferred embodiment of the invention, the fermentation gas in the fifth step needs to be preheated before entering the incinerator, and the heat source for preheating the fermentation gas is waste heat tail gas.
The invention has the beneficial effects that: combustible gas mixed with a large amount of impurities and generated in garbage fermentation is treated, redundant impurities and moisture are removed, and then the combustible gas is supplemented to an incinerator instead of combustion-supporting gas, so that the silting probability of a connecting pipeline is reduced, the unit heat value of fermentation gas entering the incinerator is improved, on one hand, harmful gas is effectively prevented from escaping into the surrounding environment to cause pollution in garbage treatment, and on the other hand, the consumption of the combustion-supporting gas in incineration is reduced, and the cost in power generation is reduced.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The embodiment of the invention comprises the following steps:
example 1
In summer, the environmental temperature is higher, and the garbage fermentation efficiency is higher, and at this moment, the wet garbage fermentation gas pretreatment method comprises the following contents:
step one, removing inorganic impurities such as glass, metal and the like from collected wet garbage through a sorting machine, then sending the wet garbage into a fermentation tank for centralized storage and anaerobic fermentation for 5 days, controlling the temperature of a fermentation area not to exceed 80 ℃, preventing overhigh temperature from influencing the activity of microorganisms, and reducing the decomposition speed;
step two, when the temperature in the fermentation tank exceeds 40 ℃, starting an induced draft fan to pump out gas generated in the fermentation process from a fermentation area;
step three, sending the extracted fermentation gas into a steam-water separator, separating liquid drops in the fermentation gas, enabling the separated liquid drops to enter a leachate collecting pool through a pipeline, purifying the liquid drops together with leachate, then cooling the fermentation gas with the formed liquid drops removed preliminarily through a water-cooling heat exchanger, enabling the heat exchange temperature of the water-cooling heat exchanger to be not more than 15 ℃, enabling the temperature of the fermentation gas after heat exchange to be not more than 25 ℃, automatically condensing and separating out supersaturated water in the fermentation gas along the water-cooling heat exchange pipeline due to the temperature reduction of the fermentation gas, and sending the condensed and separated water into the leachate collecting pool after the condensed and separated water is collected through a drainage pipeline to be used as leachate purification treatment;
and step five, removing solid particles in the fermentation gas after cooling and dewatering through a gas filter, and then feeding the fermentation gas into an incinerator through a blower to supplement combustion-supporting gas.
Wherein the purpose of removing the solid particles in the fourth step is to prevent the solid particles from adhering to the inside of the pipe and blocking the nozzle during the long-term operation of injecting the fermentation gas into the incinerator. Since the solid particles are generally organic particles, the solid particles filtered from the gas filter can be periodically cleaned and then sent into the fermented garbage to be incinerated together with the fermented garbage, so that the treatment cost is reduced.
And in the fifth step, before the fermentation gas enters the incinerator, waste heat tail gas of the incinerator is used for preheating so as to reduce the stirring of the fermentation gas to the ambient temperature when the fermentation gas enters the incinerator.
Example 2
In winter, the environmental temperature is lower, the garbage fermentation efficiency is lower, and the wet garbage fermentation gas pretreatment method comprises the following steps:
step one, removing inorganic impurities such as glass, metal and the like from collected wet garbage through a sorting machine, then sending the wet garbage into a fermentation tank for concentrated storage and anaerobic fermentation for 7 days, controlling the temperature of a fermentation area not to exceed 80 ℃, preventing overhigh temperature from influencing the activity of microorganisms, and reducing the decomposition speed;
step two, when the temperature in the fermentation tank exceeds 40 ℃, starting an induced draft fan to pump out gas generated in the fermentation process from a fermentation area;
step three, sending the extracted fermentation gas into a steam-water separator, separating liquid drops in the fermentation gas, enabling the separated liquid drops to enter a leachate collecting pool through a pipeline, purifying the liquid drops together with leachate, then cooling the fermentation gas with the formed liquid drops removed preliminarily through a water-cooling heat exchanger, enabling the heat exchange temperature of the water-cooling heat exchanger to be not more than 15 ℃, enabling the temperature of the fermentation gas after heat exchange to be not more than 25 ℃, automatically condensing and separating out supersaturated water in the fermentation gas along the water-cooling heat exchange pipeline due to the temperature reduction of the fermentation gas, and sending the condensed and separated water into the leachate collecting pool after the condensed and separated water is collected through a drainage pipeline to be used as leachate purification treatment;
and step five, removing solid particles in the fermentation gas after cooling and dewatering through a gas filter, and then feeding the fermentation gas into an incinerator through a blower to supplement combustion-supporting gas.
Wherein the purpose of removing the solid particles in the fourth step is to prevent the solid particles from adhering to the inside of the pipe and blocking the nozzle during the long-term operation of injecting the fermentation gas into the incinerator. Since the solid particles are generally organic particles, the solid particles filtered from the gas filter can be periodically cleaned and then sent into the fermented garbage to be incinerated together with the fermented garbage, so that the treatment cost is reduced.
And in the fifth step, before the fermentation gas enters the incinerator, waste heat tail gas of the incinerator is used for preheating so as to reduce the stirring of the fermentation gas to the ambient temperature when the fermentation gas enters the incinerator.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A pretreatment method of wet garbage fermentation gas is characterized by comprising the following steps:
step one, removing inorganic impurities such as glass and metal from collected wet garbage through a sorting machine, then sending the wet garbage into a fermentation tank for centralized storage and anaerobic fermentation for 5-7 days, and controlling the temperature in the fermentation tank to be not more than 80 ℃;
step two, pumping out gas generated in the fermentation process from a fermentation area through a draught fan;
step three, sending the extracted fermentation gas into a steam-water separator, separating liquid drops in the fermentation gas, and then carrying out heat exchange and cooling on the fermentation gas from which the formed liquid drops are primarily removed through a water-cooling heat exchanger;
and step five, feeding the dewatered fermentation gas into an incinerator through a blower to supplement combustion-supporting gas.
2. The pretreatment method of the wet garbage fermentation gas according to claim 1, wherein the condition for starting the induced draft fan in the second step is that the temperature of the fermentation tank exceeds 40 ℃.
3. The method for pretreating fermentation gas of wet garbage according to claim 1, wherein the liquid separated in the steam-water separator in the third step is sent to a leachate collecting tank.
4. The wet garbage fermentation gas pretreatment method according to claim 1, wherein the heat exchange temperature of the water-cooled heat exchanger is not more than 15 ℃ and the temperature of the fermentation gas after heat exchange is not more than 25 ℃.
5. The wet garbage fermentation gas pretreatment method according to claim 1, wherein the water condensed in the heat exchange pipeline after heat exchange by the water-cooled heat exchanger is collected and sent to a leachate collection tank.
6. The wet garbage fermentation gas pretreatment method of claim 1, wherein in the fifth step, solid particles are removed by a gas filter before the fermentation gas enters the incinerator.
7. The method as claimed in claim 6, wherein the solid particles filtered out by the gas filter are periodically cleaned and then fed into the fermented garbage to be incinerated together with the fermented garbage.
8. The pretreatment method of the fermentation gas of wet garbage according to claim 1, wherein the fermentation gas in the fifth step needs to be preheated before entering the incinerator, and the heat source for preheating the fermentation gas is the waste heat tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519725.3A CN112856427A (en) | 2020-12-21 | 2020-12-21 | Wet garbage fermentation gas pretreatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519725.3A CN112856427A (en) | 2020-12-21 | 2020-12-21 | Wet garbage fermentation gas pretreatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112856427A true CN112856427A (en) | 2021-05-28 |
Family
ID=75997810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011519725.3A Pending CN112856427A (en) | 2020-12-21 | 2020-12-21 | Wet garbage fermentation gas pretreatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112856427A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1857802A (en) * | 2006-06-09 | 2006-11-08 | 张志霄 | Integrated biological and incinerating treatment process for dewatered city domestic garbage |
| CN101062825A (en) * | 2007-04-19 | 2007-10-31 | 浙江大学 | Rubbish comprehensive processing method adapted for village and small town |
| CN107008728A (en) * | 2017-04-12 | 2017-08-04 | 杨国强 | A kind of processing method and its device of rubbish |
| CN111059540A (en) * | 2019-12-24 | 2020-04-24 | 常熟浦发第二热电能源有限公司 | Household garbage incineration power generation process |
-
2020
- 2020-12-21 CN CN202011519725.3A patent/CN112856427A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1857802A (en) * | 2006-06-09 | 2006-11-08 | 张志霄 | Integrated biological and incinerating treatment process for dewatered city domestic garbage |
| CN101062825A (en) * | 2007-04-19 | 2007-10-31 | 浙江大学 | Rubbish comprehensive processing method adapted for village and small town |
| CN107008728A (en) * | 2017-04-12 | 2017-08-04 | 杨国强 | A kind of processing method and its device of rubbish |
| CN111059540A (en) * | 2019-12-24 | 2020-04-24 | 常熟浦发第二热电能源有限公司 | Household garbage incineration power generation process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106746468B (en) | Sludge treatment system and treatment process | |
| CN103641272B (en) | High concentrated organic wastewater and percolate zero-discharge treatment system | |
| CN111925087A (en) | Harmless and recycling integrated treatment method and system for oil sludge | |
| RU2531400C2 (en) | Method and installation for obtaining non-rotting sediment and energy | |
| JP4510782B2 (en) | Sludge recycling method and apparatus. | |
| CN102134139A (en) | Comprehensive control process of black liquor | |
| CN105038822A (en) | Sludge clean treatment method and device | |
| JP2008212860A (en) | Waste disposal facility | |
| CN107473303B (en) | Leachate zero-discharge collaborative ultralow system and method based on waste incineration power generation | |
| CN113175675B (en) | Organic waste comprehensive treatment production line and method | |
| CN112944368B (en) | Industrial wastewater incineration treatment system and process | |
| CN113354242A (en) | Sludge treatment system and treatment method | |
| CN210313974U (en) | Sludge reduction treatment system | |
| CN211111624U (en) | Cement kiln of biological mummification mud deals with system in coordination | |
| CN204918477U (en) | Clean processing apparatus of mud | |
| CN112856427A (en) | Wet garbage fermentation gas pretreatment method | |
| CN212269766U (en) | Leachate and dry garbage collaborative full-scale treatment process system | |
| CN205442935U (en) | Concentrated processing system of waste lye | |
| CN105481192B (en) | A kind of dyeing and printing sewage handles recovery method | |
| CN214693342U (en) | Mixed salt processing system of industrial salt that contains organic matter | |
| CN212356998U (en) | Sludge treatment system | |
| JP2008036560A (en) | Methane fermentation method | |
| CN210505926U (en) | Acrylic acid effluent disposal system | |
| CN211946922U (en) | Solid waste pretreatment system matched with plasma gasification process | |
| Zhang et al. | Status quo and resource utilization technology of sludge treatment and disposal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210528 |