CN115710029A - Garbage leachate recycling treatment device and method based on garbage incinerator - Google Patents
Garbage leachate recycling treatment device and method based on garbage incinerator Download PDFInfo
- Publication number
- CN115710029A CN115710029A CN202211503689.0A CN202211503689A CN115710029A CN 115710029 A CN115710029 A CN 115710029A CN 202211503689 A CN202211503689 A CN 202211503689A CN 115710029 A CN115710029 A CN 115710029A
- Authority
- CN
- China
- Prior art keywords
- reactor
- gas
- garbage
- garbage incinerator
- spraying
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Landscapes
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a garbage leachate recycling treatment device and method based on a garbage incinerator, which comprises a filtering device, a spraying reactor, a cyclone dust collector and the garbage incinerator, wherein garbage leachate is introduced into a liquid inlet of the filtering device, a liquid outlet of the filtering device is connected with a liquid inlet of the spraying reactor, a filter residue outlet of the filtering device is connected with a feed inlet of the garbage incinerator, a gas inlet of the spraying reactor is connected with the garbage incinerator, a gas outlet of the spraying reactor is connected with a gas inlet of the cyclone dust collector, and a gas outlet of the cyclone dust collector is connected with the garbage incinerator. The invention can carry out harmless treatment on the percolate, realize resource utilization of organic combustible components, salts and ammonia nitrogen in the percolate and realize control on the waste incineration temperature on the premise of not damaging the waste incineration process.
Description
Technical Field
The invention relates to a device and a method for recycling landfill leachate, in particular to a device and a method for recycling landfill leachate based on a garbage incinerator, and belongs to the technical field of garbage treatment.
Background
The landfill leachate has complex components, is rich in high-concentration organic matters, ammonia nitrogen, salts, heavy metals and solid suspended matters, and is a common pollutant associated with the disposal of household garbage. At present, common treatment methods for landfill leachate include biological treatment, physicochemical treatment, biochemical treatment, membrane separation and the like or a combination thereof, and the methods can perform harmless treatment on the landfill leachate to a certain extent, but have the problems of high treatment cost, long treatment time, high fluctuation of treatment effect, possibility of generating secondary pollution and the like. The organic components contained in the leachate have a certain calorific value, and the chlorine salt rich in the leachate is the main component of industrial salt, so the treatment technology cannot realize effective resource utilization of the useful components.
The direct back spraying of the garbage percolate into a garbage incinerator is also one of the means for disposing the percolate, the back spraying can not only completely burn the organic components in the percolate, but also reduce the generation of nitrogen oxides in the incinerator by ammonia nitrogen in the percolate under certain conditions, and domestic and foreign garbage incineration power plants are applied. However, the back spraying of the leachate also brings problems, for example, chlorine salt in the leachate can aggravate the generation of dioxin and corrode a furnace body and a heat exchange system; uneven spraying of the leachate can cause uneven distribution of a temperature field and a velocity field in a hearth, further influence the combustion stability and reduce the removal effect of nitrogen oxides; the leachate evaporates and absorbs heat, so that the combustion temperature in the hearth can be reduced, the generated energy is influenced, and the elimination of dioxin is hindered; in addition, because the leachate contains organic suspended matters, the leachate nozzle is easy to block. The popularization and the popularization of the leachate back-spraying technology are influenced by the problems.
On the other hand, the heat value of the garbage fed into the domestic garbage incinerator is continuously improved in China, so that the combustion temperature in the hearth is increased, the yield of nitrogen oxides in the combustion process is increased, the heat load of the boiler can be enhanced, high-temperature corrosion and coking risks of a heat exchange surface and a furnace wall are easily caused, and the safe operation of the system is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a garbage leachate recycling treatment device and method based on a garbage incinerator, which can perform harmless treatment on leachate and realize recycling of organic combustible components, salts and ammonia nitrogen in the leachate.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a landfill leachate resourceful treatment device based on waste incinerator which characterized in that: contain filter equipment, spray reactor, cyclone and waste incinerator, filter equipment's inlet lets in landfill leachate, filter equipment's liquid outlet and the inlet that sprays the reactor are connected, filter equipment's filter residue export is connected with waste incinerator's dog-house, and the air inlet that sprays the reactor is connected with waste incinerator, and the gas outlet that sprays the reactor is connected with cyclone's air inlet, and cyclone's gas outlet and waste incinerator are connected.
Furthermore, the inside upside of reactor that sprays is provided with the landfill leachate nozzle, and landfill leachate nozzle is connected with the inlet that sprays the reactor, and the air inlet setting that sprays the reactor is being sprayed reactor side lower extreme, and the air inlet that sprays the reactor is connected with waste incinerator through the pipeline and is provided with the air pump on the pipeline, and the gas outlet setting that sprays the reactor is in the upper end that sprays the reactor.
Further, the air inlet of the spraying reactor is connected with the upper part of the transition area of the main combustion section and the burnout section of the fire grate of the garbage incinerator through a pipeline.
Further, the temperature inside the spray reactor was maintained at 600 ± 50 ℃.
Further, the air outlet of the cyclone dust collector is connected with a secondary combustion chamber of the garbage incinerator through a pipeline.
A treatment method of a landfill leachate recycling treatment device based on a garbage incinerator is characterized by comprising the following steps:
s1, filtering the garbage leachate, putting filter residues into a garbage incinerator for incineration disposal, and using filtrate for later use;
s2, extracting high-temperature flue gas from the upper part of a fire grate of the garbage incinerator;
s3, spraying the filtrate obtained in the step S1 from the top of a spraying reactor, introducing the high-temperature flue gas obtained in the step S2 from the bottom of the spraying reactor, promoting the evaporation of water in the filtrate into water vapor by utilizing the countercurrent heat exchange of the filtrate and the high-temperature flue gas, carrying out pyrolysis and gasification reaction on organic components in the filtrate under the action of high temperature and the water vapor to generate synthesis gas, introducing ammonia nitrogen in the filtrate into a gas phase, separating out inorganic salts contained in the filtrate into solid particles carried in mixed gas, and regulating the heat absorption amount of evaporation by controlling the flow rate of the filtrate in the spraying reactor so as to control the temperature in the spraying reactor;
s4, introducing the mixed gas obtained in the step S3 into a cyclone dust collector, and separating and collecting solid particles carried in the mixed gas;
s5, spraying the gas subjected to dust removal in the step S4 into a secondary combustion chamber of the garbage incinerator, so that combustible components contained in the gas are fully combusted in the secondary combustion chamber, and ammonia nitrogen contained in the gas also enters the secondary combustion chamber and reacts with nitrogen oxide generated by combustion in the secondary combustion chamber;
s6, purifying the solid particles obtained in the step S4 to obtain industrial salt, and realizing resource utilization of inorganic salt in the leachate.
Further, in the step S1, the landfill leachate is concentrated, and the concentration of the landfill leachate is adjusted to control the ammonia nitrogen supply amount finally entering the secondary combustion chamber, so that the ammonia nitrogen supply amount is matched with the nitrogen oxide in the flue gas of the secondary combustion chamber of the refuse incinerator.
Furthermore, the air exhaust position of the high-temperature flue gas is positioned above the transition area of the main combustion section and the burnout section of the fire grate of the garbage incinerator.
Further, the temperature of the high-temperature flue gas is 800-1000 ℃, and the temperature of the mixed gas is 250-600 ℃.
Further, the gas after dust removal in the step S5 is mixed with secondary air and then is introduced into a secondary combustion chamber.
Compared with the prior art, the invention has the following advantages and effects:
1. the high-temperature flue gas pumped out by the invention is externally circulated, and as leachate is evaporated and reacts to absorb heat in the spraying reactor, the temperature of the flue gas is reduced, so that the problem that the combustion temperature exceeds standard possibly caused by overhigh heat value of garbage is avoided, and the temperature of the flue gas can be adjusted by the leachate supply, thereby being beneficial to stabilizing the combustion state in a secondary combustion chamber;
2. the ammonia nitrogen in the landfill leachate enters the secondary combustion chamber along with the circulating flue gas, so that the effect of reducing the yield of nitric oxide in the secondary combustion chamber is achieved. The ammonia nitrogen and the circulating flue gas are fully mixed in the spraying reactor and the dust removal device, so that the problem of poor nitrogen oxide removal effect caused by uneven spraying of percolate in direct back spraying is avoided;
3. the invention recovers the salts contained in the percolate through the cyclone dust collector, avoids the problems of corrosion of a heat exchange surface and a pipe wall, increase of generation amount of dioxin and the like caused by spraying chlorine salt into a secondary combustion chamber in a direct back spraying process, and can prepare industrial salt after processing the recovered salts to realize resource recycling;
4. combustible components in the leachate are gasified into combustible synthesis gas in the spray reactor and are fully combusted after being sent into the secondary combustion chamber, so that the resource utilization of the combustible components in the leachate is realized;
5. the flue gas after the reaction is mixed with the secondary air, so that the oxygen concentration of the secondary air is reduced, and the secondary air is heated, so that the combustion in the secondary combustion chamber is carried out under the conditions of high temperature and low oxygen, and the generation of nitrogen oxides from the source is inhibited.
Drawings
Fig. 1 is a schematic diagram of a landfill leachate recycling treatment device based on a garbage incinerator.
Detailed Description
To elaborate on technical solutions adopted by the present invention to achieve predetermined technical objects, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, it is obvious that the described embodiments are only partial embodiments of the present invention, not all embodiments, and technical means or technical features in the embodiments of the present invention may be replaced without creative efforts, and the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.
As shown in fig. 1, the garbage leachate recycling device based on the garbage incinerator of the present invention comprises a filtering device 1, a spraying reactor 2, a cyclone dust collector 3 and a garbage incinerator 4, wherein the garbage leachate is introduced into a liquid inlet of the filtering device 1, a liquid outlet of the filtering device 1 is connected with a liquid inlet of the spraying reactor 2, a residue outlet of the filtering device 1 is connected with a material inlet of the garbage incinerator 4, a gas inlet of the spraying reactor 2 is connected with the garbage incinerator 4, a gas outlet of the spraying reactor 2 is connected with a gas inlet of the cyclone dust collector 3, and a gas outlet of the cyclone dust collector 3 is connected with the garbage incinerator 4.
The inside upside of reactor 2 that sprays is provided with landfill leachate nozzle, and landfill leachate nozzle is connected with the inlet that sprays reactor 2, and the air inlet setting that sprays reactor 2 is spraying 2 side lower extremes of reactor, and the air inlet that sprays reactor 2 is connected and is provided with the air pump on the pipeline through pipeline and waste incinerator 4, and the gas outlet setting that sprays reactor 2 is in the upper end that sprays reactor 2. The high-temperature flue gas in the garbage incinerator 4 is pumped out by an air pump and sent into the spraying reactor 2.
The air inlet of the spraying reactor 2 is connected with the upper part of the transition area of the main combustion section and the burnout section of the fire grate of the garbage incinerator 4 through a pipeline.
The temperature in the spray reactor 2 was maintained at 600. + -. 50 ℃. The air outlet of the cyclone dust collector 3 is connected with a second combustion chamber of the garbage incinerator 4 through a pipeline.
A treatment method of a landfill leachate recycling treatment device based on a garbage incinerator comprises the following steps:
s1, filtering the garbage leachate, putting filter residues into a garbage incinerator for incineration disposal, and using filtrate for later use. Solid particles mainly composed of organic components in the garbage leachate are separated out as filter residues through filtration and are put into a garbage incinerator for incineration to realize energy utilization.
In the invention, the landfill leachate can be original landfill leachate, and can also adopt concentrated solution of the concentrated landfill leachate. In this embodiment, landfill leachate is concentrated, and the concentration of landfill leachate is adjusted to control the ammonia nitrogen supply volume that finally gets into the second combustion chamber, make ammonia nitrogen supply volume and the nitrogen oxide in the second combustion chamber flue gas of waste incinerator match, thereby optimize the effect of getting rid of nitrogen oxide.
And S2, extracting high-temperature flue gas from the upper part of a fire grate of the garbage incinerator.
Preferably, the air exhaust position of the high-temperature flue gas is positioned above the transition region of the main combustion section and the burnout section of the grate of the garbage incinerator. So as to ensure that the extracted flue gas has higher temperature and simultaneously reduce the content of substances such as tar, soot and the like in the extracted flue gas as much as possible.
And S3, spraying the filtrate obtained in the step S1 from the top of the spraying reactor, introducing the high-temperature flue gas obtained in the step S2 from the bottom of the spraying reactor, promoting the water in the filtrate to be evaporated into water vapor by utilizing the countercurrent heat exchange of the filtrate and the high-temperature flue gas, carrying out pyrolysis and gasification reaction on organic components in the filtrate under the action of the high temperature and the water vapor to generate synthesis gas, introducing ammonia nitrogen in the filtrate into a gas phase, separating out inorganic salts contained in the filtrate into solid particles carried in mixed gas, and regulating the heat absorption amount of evaporation by controlling the flow of the filtrate in the spraying reactor so as to control the temperature in the spraying reactor.
In this embodiment, the temperature of the high temperature flue gas is 800-1000 ℃, and the temperature of the mixed gas is 250-600 ℃.
And S4, introducing the mixed gas obtained in the step S3 into a cyclone dust collector, and separating and collecting solid particles carried in the mixed gas. The main component of the solid particulate matter is an inorganic salt, especially a chloride salt, which can be further purified by subsequent steps.
And S5, spraying the gas subjected to dust removal in the step S4 into a secondary combustion chamber of the garbage incinerator, so that combustible components contained in the gas are fully combusted in the secondary combustion chamber, and ammonia nitrogen contained in the gas also enters the secondary combustion chamber and reacts with nitrogen oxide generated by combustion in the secondary combustion chamber, thereby achieving the purpose of eliminating the nitrogen oxide.
Preferably, the dedusted gas is mixed with secondary air and then introduced into a secondary combustion chamber to reduce the combustion temperature and inhibit the generation of nitrogen oxides from the source.
S6, purifying the solid particles obtained in the step S4 to obtain industrial salt, and realizing resource utilization of inorganic salt in the leachate.
Wherein, the air exhaust position of the high-temperature flue gas is positioned above the transition area of the main combustion section and the burnout section of the fire grate of the garbage incinerator.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a landfill leachate resourceful treatment device based on waste incinerator which characterized in that: contain filter equipment, spray reactor, cyclone and waste incinerator, filter equipment's inlet lets in landfill leachate, and filter equipment's liquid outlet is connected with the inlet that sprays the reactor, and filter equipment's filter residue export is connected with waste incinerator's dog-house, and the air inlet that sprays the reactor is connected with waste incinerator, and the gas outlet that sprays the reactor is connected with cyclone's air inlet, and cyclone's gas outlet and waste incinerator are connected.
2. The landfill leachate recycling treatment device based on the garbage incinerator according to claim 1, wherein: the inside upside of reactor that sprays is provided with landfill leachate nozzle, and landfill leachate nozzle is connected with the inlet that sprays the reactor, and the air inlet setting that sprays the reactor is spraying reactor side lower extreme, and the air inlet that sprays the reactor is connected with waste incinerator through the pipeline and is provided with the air pump on the pipeline, and the gas outlet setting that sprays the reactor is in the upper end that sprays the reactor.
3. The landfill leachate recycling treatment device based on the garbage incinerator according to claim 2, wherein: and the air inlet of the spraying reactor is connected with the upper part of a transition area of a main combustion section and an burnout section of a fire grate of the garbage incinerator through a pipeline.
4. The landfill leachate recycling treatment device based on the garbage incinerator according to claim 2, wherein: the temperature in the spray reactor was maintained at 600 ± 50 ℃.
5. The landfill leachate recycling treatment device based on the garbage incinerator according to claim 1, wherein: the air outlet of the cyclone dust collector is connected with a secondary combustion chamber of the garbage incinerator through a pipeline.
6. The treatment method of the landfill leachate recycling treatment device based on the garbage incinerator as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
s1, filtering the garbage leachate, putting filter residues into a garbage incinerator for incineration disposal, and using filtrate for later use;
s2, extracting high-temperature flue gas from the upper part of a fire grate of the garbage incinerator;
s3, spraying the filtrate obtained in the step S1 from the top of a spraying reactor, introducing the high-temperature flue gas obtained in the step S2 from the bottom of the spraying reactor, promoting the evaporation of water in the filtrate into water vapor by utilizing the countercurrent heat exchange of the filtrate and the high-temperature flue gas, carrying out pyrolysis and gasification reaction on organic components in the filtrate under the action of high temperature and the water vapor to generate synthesis gas, introducing ammonia nitrogen in the filtrate into a gas phase, separating out inorganic salts contained in the filtrate into solid particles carried in mixed gas, and regulating the heat absorption amount of evaporation by controlling the flow rate of the filtrate in the spraying reactor so as to control the temperature in the spraying reactor;
s4, introducing the mixed gas obtained in the step S3 into a cyclone dust collector, and separating and collecting solid particles carried in the mixed gas;
s5, spraying the gas subjected to dust removal in the step S4 into a secondary combustion chamber of the garbage incinerator, so that combustible components contained in the gas are fully combusted in the secondary combustion chamber, and ammonia nitrogen contained in the gas also enters the secondary combustion chamber and reacts with nitric oxide generated by combustion in the secondary combustion chamber;
s6, purifying the solid particles obtained in the step S4 to obtain industrial salt, and realizing resource utilization of inorganic salt in the leachate.
7. A process according to claim 6, characterized in that: in the step S1, the landfill leachate is concentrated, and the concentration of the landfill leachate is adjusted to control the ammonia nitrogen supply amount finally entering the secondary combustion chamber, so that the ammonia nitrogen supply amount is matched with the nitrogen oxide in the flue gas of the secondary combustion chamber of the garbage incinerator.
8. A process according to claim 6, characterized in that: the air extraction position of the high-temperature flue gas is positioned above the transition area of the main combustion section and the burnout section of the fire grate of the garbage incinerator.
9. A process according to claim 8, characterized in that: the temperature of the high-temperature flue gas is 800-1000 ℃, and the temperature of the mixed gas is 250-600 ℃.
10. A processing method according to claim 6, characterized by: and (5) mixing the dedusted gas and secondary air and then introducing the mixture into a secondary combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211503689.0A CN115710029A (en) | 2022-11-29 | 2022-11-29 | Garbage leachate recycling treatment device and method based on garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211503689.0A CN115710029A (en) | 2022-11-29 | 2022-11-29 | Garbage leachate recycling treatment device and method based on garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115710029A true CN115710029A (en) | 2023-02-24 |
Family
ID=85235168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211503689.0A Pending CN115710029A (en) | 2022-11-29 | 2022-11-29 | Garbage leachate recycling treatment device and method based on garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115710029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118129158A (en) * | 2024-04-09 | 2024-06-04 | 江苏名兴环保科技有限公司 | Smoke purifying device for incinerator |
-
2022
- 2022-11-29 CN CN202211503689.0A patent/CN115710029A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118129158A (en) * | 2024-04-09 | 2024-06-04 | 江苏名兴环保科技有限公司 | Smoke purifying device for incinerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102997247B (en) | System and method for incineration treatment of saliferous waste residue, saliferous waste water and stink waste gas | |
| CN105757688A (en) | Method and system for treating VOCs gas in sewage treatment plant | |
| CN109945211B (en) | Burning treatment method and system for semi-coke pyrolysis waste gas and waste liquid | |
| WO2018192564A1 (en) | Flue gas purification system for domestic waste pyrolysis incinerator | |
| CN204338559U (en) | Municipal refuse and mud total system | |
| CN109161402A (en) | Solid waste plasma gasification processing unit and method | |
| CN202272751U (en) | Rapid desalting purification recycling device for high-concentration saliferous waste water of fuel gas washing tower of hazardous waste incinerator | |
| CN107879585B (en) | Sludge resource utilization device and method | |
| CN115710029A (en) | Garbage leachate recycling treatment device and method based on garbage incinerator | |
| CN108426250A (en) | A kind of domestic garbage gasification melting electricity generation system | |
| CN112919760B (en) | Municipal sludge and kitchen waste cooperative treatment method and device for household garbage | |
| CN108865267A (en) | A kind of solid, liquid, gas body nuisance gasification purification and energy utilization system and method | |
| CN111895424A (en) | Garbage disposal and generator set coupling power generation system | |
| CN216757629U (en) | Kitchen waste and household garbage coprocessing system | |
| CN216667681U (en) | Kitchen waste and household garbage pyrolysis treatment system in coordination | |
| CN211189753U (en) | Comprehensive treatment device for waste water and waste gas | |
| CN213599378U (en) | Domestic refuse incineration treatment equipment | |
| CN211232880U (en) | High, low calorific value hazardous waste burns melting innocent treatment system in coordination | |
| CN209857072U (en) | Mobile high-temperature anaerobic incineration/cracking device for household garbage | |
| CN210480860U (en) | High-efficient hydrogen manufacturing equipment of municipal sludge resourceization | |
| CN207936086U (en) | A kind of waste incineration purification system | |
| CN110732242A (en) | comprehensive treatment device and method for wastewater and waste gas | |
| CN214032097U (en) | Garbage leachate concentrated solution pyrolysis oxidation treatment and dry salt and heat energy recovery equipment | |
| CN212362044U (en) | Garbage disposal and generator set coupling power generation system | |
| CN218469096U (en) | Acrylic acid and acrylic ester waste liquid incineration treatment device |
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 |