CN111928273A - Organic waste liquid combustion system and method adopting oxygen-enriched combustion technology - Google Patents
Organic waste liquid combustion system and method adopting oxygen-enriched combustion technology Download PDFInfo
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- CN111928273A CN111928273A CN202010803883.5A CN202010803883A CN111928273A CN 111928273 A CN111928273 A CN 111928273A CN 202010803883 A CN202010803883 A CN 202010803883A CN 111928273 A CN111928273 A CN 111928273A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
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- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses an organic waste liquid combustion system and method adopting an oxygen-enriched combustion technology, relates to the technical field of waste liquid treatment, and solves the technical problem of insufficient incineration treatment of organic waste liquid. The system comprises a waste liquid unit, a hearth and an oxygen generation unit, wherein the waste liquid unit is connected with an atomizer, and the atomizer atomizes organic waste liquid in the waste liquid unit and then inputs the organic waste liquid into the hearth; the oxygen generation equipment inputs the generated oxygen into a hearth through an oxygen injection point; residual temperature flue gas generated after the organic waste liquid is combusted in the hearth is respectively conveyed to the atomizer and the oxygen injection point through pipelines. According to the invention, the organic waste liquid is atomized by the atomizer and then is input into the hearth, and then oxygen is input into the hearth by the oxygen generation equipment, so that the atomized organic waste liquid is fully contacted with the oxygen and is combusted under the oxygen-enriched condition, the oxygen-enriched combustion improves the combustion temperature of the organic waste liquid, the residual temperature flue gas after the organic waste liquid is combusted is circulated back to the atomizer, and the temperature and the air pressure of the residual temperature flue gas are utilized, so that the organic waste liquid can be better atomized.
Description
Technical Field
The invention relates to the technical field of waste liquid treatment, in particular to an organic waste liquid combustion system and method adopting an oxygen-enriched combustion technology.
Background
Tens of thousands of tons of high-concentration industrial waste liquid which is difficult to degrade is discharged in the industries of medicine, textile, petroleum, paper making and the like every year in China. In general, these waste liquids have the following characteristics:
(1)ρ(BOD)>100mg/L、ρ(COD)>2000mg/L；
(2) the components of the waste liquid are mostly high-concentration organic matters;
(3) the calorific value of the waste liquid is higher than 10500 kJ/kg.
In recent years, with the increasing appeal of energy conservation and environmental protection in society, how to treat industrial waste liquid efficiently and cleanly has become a research hotspot. Common waste liquid treatment methods include solvent extraction, membrane separation techniques, oxidation, adsorption, and incineration.
In the prior art, the treatment method of organic waste liquid mainly adopts an incineration method, and incineration treatment is carried out through an incinerator. Because the ignition temperature of the organic waste liquid is relatively high, the conventional incineration treatment technology is difficult to fully combust the organic waste liquid, so that not only can the energy in the organic waste liquid be not fully utilized, but also harmful smoke, such as carbon monoxide, dioxin and the like, can be generated due to insufficient combustion of the organic waste liquid, and thus, the environment is seriously influenced.
Disclosure of Invention
In view of the above, the present invention is directed to overcome the deficiencies of the prior art, and in a first aspect, provides an organic waste liquid combustion system using oxygen-enriched combustion technology to solve the technical problem of insufficient incineration treatment of organic waste liquid in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the utility model provides an adopt organic waste liquid combustion system of oxygen boosting combustion technique, includes waste liquid unit, furnace and system oxygen unit, wherein:
the waste liquid unit is connected with an atomizer, and the atomizer atomizes organic waste liquid in the waste liquid unit and then inputs the organic waste liquid into the hearth;
the oxygen generation unit comprises oxygen generation equipment and an oxygen injection point, and the oxygen generation equipment inputs the generated oxygen into the hearth through the oxygen injection point;
residual temperature flue gas after the organic waste liquid is burnt in furnace carries to the atomizer respectively through the pipeline in order to promote the atomizing of organic waste liquid, residual temperature flue gas still mixes in order to form the organic waste liquid after the combustion-supporting atomizing of oxygen-enriched gas with the oxygen of annotating oxygen point output.
On the basis of the technical scheme, the organic waste liquid combustion system adopting the oxygen-enriched combustion technology can be improved as follows.
Optionally, the waste liquid unit comprises a waste liquid tank and a waste liquid concentration device which are connected through a pipeline, the organic waste liquid in the waste liquid tank is input into the waste liquid concentration device through the pipeline for concentration, the concentrated organic waste liquid is input into the atomizer through the waste liquid concentration device through the pipeline, and the residual temperature flue gas generated after the organic waste liquid is combusted in the hearth is conveyed to the atomizer through the pipeline; alternatively, the first and second electrodes may be,
and residual temperature flue gas generated after the organic waste liquid is combusted in the hearth is conveyed to a pipeline between the waste liquid concentration device and the atomizer through a pipeline.
Optionally, the residual heat flue gas outlet of the hearth is connected with a first mass flow meter through a pipeline, the first mass flow meter is respectively connected with a condenser and a second mass flow meter through pipelines, and the condenser is connected with a CO through a pipeline2And the second mass flow meter is respectively connected with the atomizer and the oxygen injection point through pipelines.
Optionally, there is a purifier between the residual heat flue gas outlet of the furnace and the first mass flow meter through a pipeline, and the purifier purifies the residual heat flue gas.
Optionally, a heat exchanger is further connected between the residual temperature flue gas outlet of the furnace and the first mass flow meter through a pipeline, and the heat exchanger is arranged between the residual temperature flue gas outlet of the furnace and the purifier; or the heat exchanger is arranged between the purifier and the first mass flow meter.
Optionally, the first mass flow meter and the second mass flow meter are further respectively connected with a stop valve, a regulating valve and/or a bleed-off valve through pipelines.
Optionally, the oxygen injection points are connected with the hearth through a plurality of pipelines, and the pipelines are uniformly distributed around the atomizer.
In a second aspect, the present invention further provides an organic waste liquid combustion method using oxycombustion technology, in which the organic waste liquid combustion system using oxycombustion technology includes the following steps:
s1, inputting the atomized organic waste liquid into the hearth through the atomizer by the waste liquid unit, and simultaneously inputting oxygen into the hearth through the oxygen injection point by the oxygen making equipment;
s2, conveying the residual temperature flue gas after the organic waste liquid is combusted to an atomizer through a pipeline to promote the atomization of the organic waste liquid, and meanwhile conveying the residual temperature flue gas after the organic waste liquid is combusted to an oxygen injection point through the pipeline to enable the residual temperature flue gas to be mixed with oxygen to form the oxygen-enriched gas combustion-supporting atomized organic waste liquid.
On the basis of the technical scheme, the organic waste liquid combustion method adopting the oxygen-enriched combustion technology can be improved as follows.
Optionally, the oxygen content output by the oxygen production equipment through the oxygen injection point accounts for 24-35% of the volume of the oxygen-enriched gas, and the rest is waste heat flue gas generated after combustion of the waste liquid.
Optionally, the waste liquid unit carries the organic waste liquid to the atomizer after concentrating, the waste heat flue gas after the organic waste liquid burning atomizes the organic waste liquid after the concentration.
Compared with the prior art, the organic waste liquid combustion system adopting the oxygen-enriched combustion technology has the beneficial effects that:
according to the invention, the organic waste liquid is atomized by the atomizer and then is input into the hearth, and then oxygen is input into the hearth by the oxygen generation unit, so that the atomized organic waste liquid is fully contacted with the oxygen and is combusted under the oxygen-enriched condition, the oxygen-enriched combustion improves the combustion temperature of the organic waste liquid, the residual temperature flue gas after the organic waste liquid is combusted is circulated back to the atomizer, the temperature and the air pressure of the residual temperature flue gas are utilized, the atomizer can better atomize the organic waste liquid, and the problem of difficult combustion of the organic waste liquid is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view showing the structure of an organic waste liquid combustion system using an oxycombustion technology according to the present invention.
In the figure:
1-filling waste liquid; 2-a waste liquid concentration device; 3-an atomizer; 4, a molten pool; 5, a hearth; 6, a heat exchanger; 7-a purifier; 8-a first mass flow meter; 9-a condenser; 10-CO2A storage tank; 11-a second mass flow meter; 12-an oxygen generating plant; 13-oxygen injection point.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention and are not to be taken as a comprehensive embodiment. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
the invention provides an organic waste liquid combustion system adopting an oxygen-enriched combustion technology, which comprises a waste liquid unit, a hearth 5 and an oxygen generation unit as shown in figure 1, wherein the oxygen generation unit also comprises an oxygen generation device 12 and an oxygen injection point 13. The waste liquid unit is connected with atomizer 3, and the organic waste liquid in the waste liquid unit passes through 3 atomizes of atomizer and inputs furnace 5, and atomizer 3 includes but not limited to two fluid atomization equipment or ultrasonic atomization equipment. An oxygen generating device 12 inputs the generated oxygen into the furnace 5 through an oxygen injection point 13, and the oxygen generating device 12 comprises but is not limited to an air separation device, an oxygen generator or an oxygen tank. The hearth 5 is respectively connected with the atomizer 3 and the oxygen injection point 13 through pipelines.
The atomized organic waste liquid is fully contacted with oxygen in the hearth 5 and is combusted. On the one hand, the organic waste liquid forms the droplet after atomizing, easily burns after fully contacting with oxygen, and on the other hand, the content of oxygen is higher for the oxygen content in the air in furnace 5, and the temperature that the organic waste liquid burnt in furnace 5 is higher than the temperature of burning in the air to make organic waste liquid can fully burn in furnace 5, avoided producing the problem of harmful flue gas because the burning is insufficient.
The residual heat flue gas after the organic waste liquid burning passes through the pipeline and introduces atomizer 3 respectively and annotates oxygen point 13, and the atmospheric pressure of residual heat flue gas can promote organic waste liquid to atomize through the aperture of atomizer 3, and simultaneously, the temperature of residual heat flue gas can increase the mobility of organic waste liquid to be favorable to the abundant atomizing of organic waste liquid, reduced the energy consumption of organic waste liquid atomization process. On the other hand, the oxygen-enriched gas formed by mixing the residual-temperature flue gas and the oxygen can fully combust the organic waste liquid. Optionally, the oxygen-enriched gas is maintained at an economic oxygen content of 24-35%, avoiding excessive consumption of oxygen and increasing the cost of oxygen production.
As shown in fig. 1, the waste liquid unit comprises a waste liquid tank 1 and a waste liquid concentration device 2, the waste liquid tank 1 inputs organic waste liquid into the waste liquid concentration device 2 through a pipeline for concentration, and the waste liquid concentration device 2 inputs the concentrated organic waste liquid into an atomizer 3 through a pipeline for atomization. The waste liquid concentrating device 2 includes, but is not limited to, an evaporation concentrating device or a membrane concentrating device. Residual heat flue gas after the furnace 5 burns organic waste liquid is carried to atomizer 3 through the pipeline to promote the atomizing of organic waste liquid in atomizer 3. Certainly, the waste heat flue gas after the organic waste liquid is burnt in the furnace 5 can also be conveyed to the pipeline between the waste liquid concentration device 2 and the atomizer 3 through the pipeline, and the effect of air pressure pushing and mobility increasing can be also played to the organic waste liquid.
After the organic waste liquid is concentrated, the heat value of the organic waste liquid can be improved, so that the combustion efficiency of the organic waste liquid is improved. However, the concentrated organic waste liquid is viscous and not easy to atomize. The invention heats the concentrated organic waste liquid by the residual temperature flue gas after burning the organic waste liquid through the hearth 5, and can play a role of increasing the fluidity of the concentrated organic waste liquid, thereby being beneficial to the atomization of the concentrated organic waste liquid.
As shown in fig. 1, the residual temperature flue gas outlet of the furnace 5 is connected with a first mass flow meter 8 through a pipeline, and the first mass flow meter 8 is respectively connected with a condenser 9 and a second mass flow meter 11 through pipelines. The condenser 9 is connected with CO through a pipeline2The storage tank 10 and the second mass flow meter 11 are respectively connected with the atomizer 3 and the oxygen injection point 13 through pipelines. The bottom of the hearth 5 is provided with a molten pool 4 for collecting the residual oxide after the organic waste liquid is combusted. Of course, the first mass flow meter 8 and the second mass flow meter 11 may also be connected to valve structures such as a stop valve, an adjusting valve and/or a bleeding valve through pipelines, respectively, for controlling the residual heat flue gas, the circulation and the closing, the flow rate and the safety flow rate.
Initially, the residual-temperature flue gas is circulated back to the furnace 5 from the residual-temperature flue gas outlet through the first mass flow meter 8, the second mass flow meter 11, the atomizer 3 and the oxygen injection point 13, so that the organic waste liquid is fully combusted in the furnace 5, and the CO is reduced2And heat loss of the residual temperature flue gas. When the flue gas recycling rate reaches 70%, CO is recycled through the condenser 92Cooling is carried out, finally CO2The storage tank 10 collects.
As shown in fig. 1, a purifier 7 is connected between the residual temperature flue gas outlet of the furnace 5 and the first mass flow meter 8 through a pipeline, and the purifier 7 includes, but is not limited to, a desulfurization and denitrification device, a dust remover, or a waste gas treatment device, and is used for removing harmful substances such as nitrogen oxides or sulfur oxides in the residual temperature flue gas. And a heat exchanger 6 is connected between the residual temperature flue gas outlet of the hearth 5 and the first mass flow meter 8 through a pipeline, and the heat exchanger 6 is arranged between the residual temperature flue gas outlet of the hearth 5 and the purifier 7. Of course, the heat exchanger 6 can also be arranged between the purifier 7 and the first mass flow meter 8. The heat exchanger 6 can be used in a waste heat boiler to convert water into steam, or alternatively, can be used for heating in winter. The organic waste liquid combustion system adopting the oxygen-enriched combustion technology makes full use of the heat of the residual temperature flue gas through the heat exchanger 6, and improves the heat energy utilization rate of organic waste liquid combustion.
Particularly, the oxygen injection points 13 are connected with the hearth 5 through a plurality of pipelines which are uniformly distributed around the atomizer 3, so that the contact area of the oxygen-enriched gas and the atomized organic waste liquid is increased, and the full combustion of the organic waste liquid is facilitated.
Example 2:
the invention also provides an organic waste liquid combustion method adopting the oxygen-enriched combustion technology, and an organic waste liquid combustion system adopting the oxygen-enriched combustion technology. First, the organic waste liquid in the waste liquid tank 1 is atomized by the atomizer 3 and then fed into the furnace 5, and in order to increase the calorific value of the organic waste liquid, the organic waste liquid may be atomized after being concentrated by the waste liquid concentrating device 2. Meanwhile, oxygen is input into the hearth 5 through the oxygen injection point 13, and the method for generating oxygen by the oxygen generating device 12 comprises but is not limited to a membrane separation method, a pressure swing adsorption method or a cryogenic method, and an air separator can be selected. Then, the organic waste liquid is subjected to oxygen-enriched combustion in the hearth 5, and the burnt residual-temperature flue gas is conveyed to the atomizer 3 or a pipeline between the waste liquid concentration device 2 and the atomizer 3 through a pipeline. The temperature of waste heat flue gas can improve the mobility of organic waste liquid to the atmospheric pressure of waste heat flue gas can promote organic waste liquid and pass through 3 atomizers of atomizer, thereby promotes the atomizing of organic waste liquid. Meanwhile, oxygen-enriched gas formed by mixing waste heat flue gas and oxygen can support combustion of organic waste gas, so that organic waste liquid is fully combusted.
The heat exchanger 6 is used for absorbing the heat energy of the residual temperature flue gas, and is used for converting boiler steam or warming in winter so as to improve the combustion heat energy utilization rate of the organic waste liquid. When the residual heat flue gas circulation utilization rate reaches 70%, the flue gas is cooled by a condenser 9 and passes through CO2The storage tank 10 collects CO after combustion of the organic waste liquid2Byproduct, used in industrial production.
The invention utilizes the circulation of residual temperature by recycling residual temperature flue gas after the organic waste liquid is combusted back to the atomizer 3 and the oxygen injection point 13The ring flue gas promotes the atomization of the organic waste liquid, and the combustion of the organic waste liquid is enhanced by improving the oxygen concentration, so that the problem of difficult combustion of the organic waste liquid is solved. Meanwhile, the heat energy of the residual heat flue gas is used for the heat exchanger 6, so that the heat energy utilization rate of the residual heat flue gas is improved. CO prepared by the invention2Byproducts, and can also be used in industrial production.
Example 3:
as shown in figure 1, a part of residual temperature flue gas generated after organic waste liquid is combusted in a hearth 5 of the invention is input into a condenser 9 through a first mass flow meter 8, and the other part of residual temperature flue gas is input into a second mass flow meter 11 through the first mass flow meter 8 for circulation. The residual temperature flue gas volume for circulation is A, and a pipeline of the second mass flow meter 11 is provided with valve structures such as a stop valve and/or an adjusting valve for controlling the residual temperature flue gas volume and the flow direction. The residual temperature flue gas with the concentration of 24 percent A flows into the atomizer 3, heats the organic waste liquid in the atomizer 3 and promotes atomization. Meanwhile, the residual 76% A of residual temperature flue gas flows into the oxygen injection point 13, the residual 76% A of residual temperature flue gas is mixed with oxygen to form oxygen-enriched gas, and the oxygen-enriched gas is input into the hearth 5, so that the atomized organic waste liquid is fully combusted under the oxygen-enriched condition.
The invention can adjust the oxygen content in the oxygen-enriched gas through the valve structures such as a stop valve and/or an adjusting valve, namely, when the oxygen quantity output by the oxygen making equipment 12 through the oxygen injection point 13 is constant, the proportion of the residual temperature flue gas respectively input into the atomizer 3 and the oxygen injection point 13 is changed. The oxygen content in the oxygen-enriched gas can also be adjusted through the oxygen production device 12, that is, when the amount of the residual temperature flue gas input to the oxygen injection point 13 is a certain amount, the amount of the oxygen output by the oxygen production device 12 through the oxygen injection point 13 is changed.
Example 4:
as shown in figure 1, residual temperature flue gas generated after organic waste liquid is combusted in a hearth 5 is completely input into a second mass flow meter 11 through a first mass flow meter 8 for circulation. The residual temperature flue gas volume for circulation is B, and a pipeline of the second mass flow meter 11 is provided with valve structures such as a stop valve and/or an adjusting valve for controlling the residual temperature flue gas volume and the flow direction. The residual temperature flue gas with the temperature of 35% B flows into the atomizer 3, the organic waste liquid in the atomizer 3 is heated and atomization is promoted, meanwhile, the residual temperature flue gas with the temperature of 65% B flows into the oxygen injection point 13, the residual temperature flue gas with the temperature of 65% B and oxygen are mixed to form oxygen-enriched gas, the oxygen-enriched gas is input into the hearth 5, and the atomized organic waste liquid is fully combusted under the oxygen-enriched condition. And the residual temperature flue gas after multiple cycles and complete combustion is input into a condenser 9 through a first mass flow meter 8 to be condensed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. The utility model provides an adopt organic waste liquid combustion system of oxygen boosting combustion technology which characterized in that, includes waste liquid unit, furnace (5) and system oxygen unit, wherein:
the waste liquid unit is connected with an atomizer (3), and the atomizer (3) atomizes the organic waste liquid in the waste liquid unit and then inputs the organic waste liquid into a hearth (5);
the oxygen generation unit comprises an oxygen generation device (12) and an oxygen injection point (13), wherein the oxygen generation device (12) inputs generated oxygen into the hearth (5) through the oxygen injection point (13);
the residual heat flue gas after furnace (5) burning organic waste liquid passes through the pipeline and carries to atomizer (3) in order to promote the atomizing of organic waste liquid, the residual heat flue gas still mixes in order to form the organic waste liquid after the combustion-supporting atomizing of oxygen-enriched gas with the oxygen of annotating oxygen point (13) output.
2. An organic waste liquid combustion system adopting an oxygen-enriched combustion technology as claimed in claim 1, wherein the waste liquid unit comprises a waste liquid tank (1) and a waste liquid concentration device (2) which are connected by a pipeline, the organic waste liquid in the waste liquid tank (1) is input into the waste liquid concentration device (2) through a pipeline for concentration, the waste liquid concentration device (2) inputs the concentrated organic waste liquid into the atomizer (3) through a pipeline, and the residual temperature flue gas generated after the organic waste liquid is combusted in the hearth (5) is conveyed to the atomizer (3) through a pipeline; alternatively, the first and second electrodes may be,
waste heat flue gas after the organic waste liquid is combusted in the hearth (5) is conveyed to a pipeline between the waste liquid concentration device (2) and the atomizer (3) through a pipeline.
3. An organic waste liquid combustion system adopting an oxygen-enriched combustion technology as claimed in claim 1, wherein the residual-temperature flue gas outlet of the furnace chamber (5) is connected with a first mass flow meter (8) through a pipeline, the first mass flow meter (8) is respectively connected with a condenser (9) and a second mass flow meter (11) through pipelines, and the condenser (9) is connected with a CO through a pipeline2And the second mass flow meter (11) is respectively connected with the atomizer (3) and the oxygen injection point (13) through pipelines.
4. An organic waste liquid combustion system adopting an oxygen-enriched combustion technology as claimed in claim 3, wherein a purifier (7) is connected between the residual-temperature flue gas outlet of the furnace chamber (5) and the first mass flow meter (8) through a pipeline, and the purifier (7) purifies residual-temperature flue gas.
5. An organic waste liquid combustion system adopting an oxygen-enriched combustion technology as claimed in claim 4, wherein a heat exchanger (6) is further connected between the residual-temperature flue gas outlet of the furnace (5) and the first mass flow meter (8) through a pipeline, and the heat exchanger (6) is arranged between the residual-temperature flue gas outlet of the furnace (5) and the purifier (7); or the heat exchanger (6) is arranged between the purifier (7) and the first mass flow meter (8).
6. An organic waste liquid combustion system adopting an oxycombustion technology according to claim 5, characterized in that the first mass flow meter (8) and the second mass flow meter (11) are further connected with a stop valve, a regulating valve and/or a bleed valve, respectively, through a pipeline.
7. An organic waste liquid combustion system adopting an oxycombustion technology according to any one of claims 1 to 6, characterized in that the oxygen injection points (13) are connected with the furnace (5) through a plurality of pipes, which are evenly distributed around the atomizer (3).
8. A method for combusting organic waste liquid by oxycombustion technology, characterized in that, the organic waste liquid combustion system by oxycombustion technology of any one of claims 1 to 7 is used, comprising the following steps:
s1, inputting the atomized organic waste liquid into the hearth (5) through the atomizer (3) by the waste liquid unit, and simultaneously inputting oxygen into the hearth (5) by the oxygen making equipment (12) through the oxygen injection point (13);
s2, conveying the residual temperature flue gas after the organic waste liquid is combusted to the atomizer (3) through a pipeline to promote the atomization of the organic waste liquid, and meanwhile conveying the residual temperature flue gas after the organic waste liquid is combusted to an oxygen injection point (13) through a pipeline to enable the residual temperature flue gas and oxygen to be mixed to form the organic waste liquid after oxygen-enriched gas combustion-supporting atomization.
9. A method for combusting organic waste liquid by an oxycombustion technology according to claim 8, characterized in that the oxygen content outputted from the oxygen generating equipment (12) through the oxygen injection point (13) accounts for 24-35% of the volume of the oxygen-enriched gas, and the rest is the residual temperature flue gas after the combustion of the organic waste liquid.
10. An organic waste liquid combustion method adopting an oxygen-enriched combustion technology as claimed in claim 8, wherein the waste liquid unit is used for concentrating the organic waste liquid and then conveying the organic waste liquid to the atomizer (3), and the residual temperature flue gas after the organic waste liquid combustion atomizes the concentrated organic waste liquid.
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