CN105333440A - Flue gas recirculation type garbage pyrolysis gasification oxygen-rich incinerator - Google Patents

Abstract

The invention discloses a flue gas circulation type garbage pyrolysis gasification oxygen-enriched incinerator, comprising an incinerator body, a flue gas circulation air supply system, a flue gas filtering device, an oxygen-enriched air supply system, and a flue gas waste heat heat exchanger , flue gas purification device; the main body of the incinerator includes a combustion chamber and a second combustion chamber, which are respectively used for pyrolysis gasification of waste and incineration of combustible substances; the circulating flue gas is injected into the incinerator through the flue gas circulation air supply system, improving The degree of turbulence in the furnace strengthens waste incineration, reduces the generation of incompletely burned pollutants such as dioxin precursors, and reduces pollutant emissions. The oxygen-enriched air supply system can increase the incineration temperature and reduce the consumption of auxiliary fuel. The flue gas filtering device and the flue gas purification device can further reduce pollutant emissions, and the flue gas waste heat heat exchanger can recover the waste heat of the flue gas. The invention can effectively solve the problems of low incineration temperature, poor combustion efficiency, high consumption of auxiliary fuel and substandard discharge of pollutants caused by low calorific value, high water content and low oxygen content in the air.

Description

A flue gas circulation type garbage pyrolysis gasification oxygen-enriched incinerator

technical field

The invention belongs to the field of incinerators, and more specifically relates to a garbage pyrolysis gasification oxygen-enriched incinerator adopting a flue gas circulation mode.

Background technique

With the development of the economy, people's material living standards have been greatly improved, accompanied by a large amount of garbage, which has caused serious pollution to the atmosphere, soil, water sources, etc., and has caused great harm to our living environment. It is urgent to solve the garbage problem. . Incineration treatment is currently recognized as a better treatment method for volume reduction and volume reduction. Except for the ash generated, the combustible substances are completely burned, and it is generally believed that it can reduce volume by 85-90%. Currently in developed countries, incineration is the mainstream waste terminal treatment technology. In recent years, my country's waste incineration industry has also achieved rapid development, but there is still a large gap between the level of waste incineration and developed countries, and there is a huge gap in advanced incineration equipment, especially small and compact incineration equipment that handles scattered waste. With the introduction of the latest "Pollution Control Standards for Domestic Garbage Incineration" GB18485-2014, the pollutant discharge limits have dropped significantly, and higher requirements have been placed on the incineration level. Therefore, it is urgent to develop new and efficient incineration equipment.

The effect of waste incineration mainly depends on the "3T" principle, "3T" refers to temperature, turbulence, and residence time. The higher the incineration temperature, the greater the turbulence in the furnace, and the longer the residence time of the flue gas in the furnace, the better the incineration effect and the more complete decomposition of pollutants such as dioxins. According to the regulations of the Ministry of Environmental Protection, the incineration temperature of domestic waste in the secondary combustion chamber in my country must be above 850 °C, hazardous waste must be above 1100 °C, and the residence time of flue gas in the secondary combustion chamber must be above 2S. Due to the complex composition of waste in my country, high water content and low calorific value, the following problems exist in the incineration process:

① It is difficult to achieve stable incineration and reach the specified incineration temperature. In order to meet the requirements, a large amount of auxiliary fuel must be invested, which increases the emission of pollutants such as dioxins and operating costs.

② In order to meet the residence time requirement of 2S, the flue gas travel in the furnace is long or the flue gas flow rate is too low, which may easily cause insufficient turbulence in the furnace, affect the incineration effect, and increase the emission of pollutants such as dioxins.

③Due to lack of oxygen during operation in plateau areas, the above problems will be more serious. In order to ensure combustion, more air needs to be blown into the plateau area than in the plain area, so that the incineration temperature is greatly reduced, and the flue gas flow rate is increased, which reduces the residence time in the furnace and significantly increases the emission of pollutants such as dioxins. .

Contents of the invention

In view of the above problems, the present invention provides a waste pyrolysis gasification oxygen-enriched incinerator adopting the flue gas circulation mode. It can improve the incineration effect and the heat utilization efficiency of the incinerator, reduce the generation of pollutants such as dioxin, and the equipment is small in size, and can be manufactured as a small mobile equipment to facilitate the treatment of scattered garbage. The present invention proposes a garbage pyrolysis gasification oxygen-enriched incinerator adopting the flue gas circulation mode, including the main body of the incinerator and the flue gas circulation air supply system:

The main body of the incinerator includes a combustion chamber 2 and a second combustion chamber 3. The first combustion chamber 2 is used for pyrolysis and gasification of garbage, and the combustible gas produced is sent to the second combustion chamber 3; the first combustion chamber 2 is equipped with at least one first combustion chamber. The device 1 is used for the air supply of the first combustion chamber 2 and the injection of auxiliary fuel to realize the pyrolysis and gasification of the garbage in the first combustion chamber 2; the second combustion chamber 3 is used to incinerate the combustible gas generated by the first combustion chamber 2, It is equipped with a second burner 4 for the air supply of the second combustion chamber 3 and the injection of auxiliary fuel;

The flue gas circulation air supply system includes a heat exchanger 13, a flue gas booster fan 103 and a flue gas return pipeline 81; the flue gas outlet of the second combustion chamber 3 is connected to the heat exchanger 13 through the flue gas pipeline bus 8, and the heat exchanger 13 is connected to the incinerator through the flue gas return pipeline 81; the flue gas booster fan 103 is installed on the flue gas return pipeline 81;

During operation, the flue gas generated in the second combustion chamber 3 is sent to the heat exchanger 13 through the flue gas pipeline bus 8 for heat exchange, and one way is discharged out of the system through the flue gas discharge pipeline 82, and the other way is pressurized by the flue gas booster fan 103 , and return to the secondary combustion chamber 3 through the flue gas return pipeline 81.

Further, the flue gas return pipeline from the flue gas booster fan 103 of the waste pyrolysis gasification oxygen-enriched incinerator to the second combustion chamber 3 is connected to the second combustion chamber 3 in two ways, and one path passes through the first flue gas return pipeline The branch line 811 is connected to the second burner 4 of the second combustion chamber 3, and one path is connected to the circulating flue gas injection port 19 of the second combustion chamber through the second flue gas return pipeline branch line 812; the function of the flue gas return is to increase the turbulence in the second combustion chamber, Enhance the incineration effect, so that pollutants such as dioxin precursors are less generated and completely decomposed, reducing pollutant emissions.

Further, the waste pyrolysis gasification oxygen-enriched incinerator includes a flue gas filtering device 14, which is installed between the outlet of the heat exchanger 13 and the inlet of the flue gas return pipeline 81, and is used to filter the flue gas The particles are captured to reduce wear on the flue gas booster fan 103 and reduce heavy metal emissions.

Further, the waste pyrolysis gasification oxygen-enriched incinerator includes an oxygen-enriched air supply system, and the oxygen-enriched air supply system includes an oxygen-enriched air generating device 7 and an oxygen booster fan 101, and the two are connected and then connected To the heat exchanger 13; the oxygen outlet end of the heat exchanger 13 is connected with a hot oxygen main pipeline 9B, and the hot oxygen main pipeline 9B communicates with the second burner 4 of the second combustion chamber 3 through the second hot oxygen pipeline branch line 92; during work, The oxygen-enriched air generated by the oxygen-enriched air generating device 7 is pressurized by the oxygen booster fan 101 and preheated by the heat exchanger 13, and then sent to the second combustion chamber 3 through the thermal oxygen main pipeline 9B and the second thermal oxygen pipeline branch line 92 The second burner 4. On this basis, it can also be communicated with the first burner 1 of the first combustion chamber 2 through the first hot oxygen branch line 91; The temperature and oxygen concentration of the air supply in chamber 2 stabilize the pyrolysis and gasification process of the garbage in the first combustion chamber 2, and the combustible gas produced has a higher calorific value, which is beneficial to the incineration of the second combustion chamber 3, and the oxygen-enriched air supply system also improves The temperature and oxygen concentration of the gas sent to the second combustion chamber 3 are improved, the combustion temperature of the second combustion chamber 3 is increased, and the generation of pollutants such as dioxin precursors is reduced. The oxygen-enriched air supply system reduces the consumption of auxiliary fuel and improves the efficiency of the incinerator. heat utilization efficiency.

Further, in the above-mentioned garbage pyrolysis gasification oxygen-enriched incinerator, the flue gas exhaust pipeline 82 is a pipeline connecting the outlet of the flue gas filtering device 14 to the exhaust outlet of the system, including the flue gas purification device 16 and the exhaust gas outlet. Fan 102; the exhausted flue gas is cooled by the flue gas waste heat exchanger 15, and the pollutants in the flue gas are further removed by the flue gas purification device 16, and then discharged; the induced draft fan 102 is installed on the flue gas discharge pipeline 82 smoke outlet.

Further, the flue gas exhaust pipeline 82 of the waste pyrolysis gasification oxygen-enriched incinerator also includes a flue gas waste heat exchanger 15 and/or a cooling medium pipeline 17; the flue gas waste heat exchanger 15 It is used to cool down the exhausted flue gas for subsequent purification treatment of the flue gas; the cooling medium pipeline 17 is used to recover the waste heat of the exhausted flue gas to further improve the energy efficiency of the system.

Further, the operating temperature of the flue gas filtering device 14 in the oxygen-enriched pyrolysis gasification incinerator of waste is preferably 500-400°C, and trapping particles such as fly ash in this temperature range can avoid fly ash and Denovo heterogeneouslycatalysed reactions at 200-400°C for components in the flue gas reduce the catalytic synthesis of dioxins in the flue gas pipeline.

Further, the first thermal oxygen pipeline branch 91, the second thermal oxygen pipeline branch 92, the first flue gas return pipeline branch 811 and the second flue gas return pipeline branch in the waste pyrolysis gasification oxygen-enriched incinerator 812 is equipped with gauges and regulating valves.

Further, the preheating of the oxygen-enriched air in the waste pyrolysis gasification oxygen-enriched incinerator is realized through the heat exchanger 15, and the heat exchanger 13 is equipped with a cooling medium pipeline 17 for recovering smoke Air waste heat.

Further, the incinerator in the waste pyrolysis gasification oxygen-enriched incinerator also includes an air supply pipeline, and the air supply pipeline includes an air booster fan 104, a heat exchanger 13 and an air pipeline 18, and the air The booster fan 104 is used to pressurize the air into the heat exchanger 13 for heat exchange, and then send it into the combustion chamber 2 through the air pipeline 18 . The first combustion chamber 2 uses air instead of oxygen-enriched air, which can reduce operating costs.

Further, the flue gas exhaust pipeline 82 is a pipeline connecting the outlet of the flue gas filtering device 14 to the exhaust outlet of the system, including the flue gas purification device 16 and the induced draft fan 102; After cooling down, the pollutants in the flue gas are further removed by the flue gas purification device 16 and then discharged; the induced draft fan 102 is installed at the exhaust outlet of the flue gas discharge pipeline 82; The acidic components in the flue gas are neutralized, so that acidic substances such as HCl and SO ₂ in the flue gas are removed.

Further, in the above-mentioned waste pyrolysis gasification oxygen-enriched incinerator, the type of the oxygen-enriched air generating device 7 includes a gas tank type or an oxygen generating device using membrane separation method, pressure swing adsorption method or cryogenic method.

Further, in the above-mentioned waste pyrolysis gasification oxygen-enriched incinerator, the oxygen-enriched air supply system can cancel the branch line 91 of the oxygen-enriched air sent to the first burner 1 of the first combustion chamber 2, and can be pressurized by air The blower 104 sends the air preheated by the heat exchanger 13 to the first burner 1 of the first combustion chamber 2 through the air pipeline 18, so as to save operating costs.

Further, in the above-mentioned garbage pyrolysis gasification oxygen-enriched incinerator, the oxygen-enriched air can also be preheated through the flue gas waste heat heat exchanger 15; the heat exchanger 13 can also be equipped with a cooling medium pipeline for recovering smoke Air waste heat.

Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

1) The sensible heat in the flue gas is recovered, the heat utilization efficiency of the incinerator is improved, and the consumption of auxiliary fuel is reduced.

2) The air supply temperature of the incinerator is increased, which stabilizes the pyrolysis gasification incineration process, increases the calorific value of the combustible gas produced by pyrolysis gasification, and increases the incineration temperature.

3) The flue gas circulation improves the turbulence in the furnace, improves the incineration effect, and reduces the generation of pollutants such as dioxins.

4) The flue gas filter device is used to trap fly ash and other particles before the flue gas circulation, which reduces the wear of the fan, reduces the emission of particulate matter and heavy metals, and avoids the 200-400°C de novo generation of fly ash and flue gas Synthetic heterogeneous catalytic reaction reduces the catalytic synthesis of dioxins in the flue, making the generation of dioxins significantly reduced.

5) Solve the problem of clean and efficient incineration of high ash, high humidity, low calorific value garbage and garbage in plateau areas.

In short, the flue gas circulation type waste pyrolysis gasification oxygen-enriched incinerator can achieve better incineration effect and has energy-saving significance, can meet stricter emission standards, and has great technical advantages.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Names of main components in the figure: 1-first burner, 2-first combustion chamber, 3-second combustion chamber, 4-second burner, 51-regulating valve, 61-meter, 7-oxygen-enriched air generator , 101-oxygen booster fan, 11-release valve, 12-on-off valve, 13-heat exchanger, 14-flue gas filter device, 103-flue gas booster fan, 15-flue gas waste heat exchanger, 16- Flue gas purification device, 102-induced fan, 104-air booster fan, 19-circulating flue gas injection inlet;

Pipeline name: 9-oxygen pipeline bus, 9B-thermal oxygen pipeline bus, 91-first thermal oxygen pipeline branch line, 92-second thermal oxygen pipeline branch line, 8-flue gas pipeline bus, 81-flue gas return pipeline, 811- The first flue gas return pipeline branch line, 812-the second flue gas return pipeline branch line, 82-the flue gas discharge pipeline, 18-air pipeline, 17-cooling medium pipeline.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

Referring to Figure 1, a waste pyrolysis gasification oxygen-enriched incinerator adopting flue gas circulation is characterized in that it includes an incinerator main body, a flue gas circulation air supply system, a flue gas filtering device, an oxygen-enriched air supply system, a flue gas Gas waste heat exchanger, flue gas purification device:

The main body of the incinerator includes a combustion chamber 2 and a second combustion chamber 3. The first combustion chamber 2 is used for pyrolysis and gasification of garbage, and the combustible gas produced is sent to the second combustion chamber 3. The first combustion chamber is equipped with at least one first burner 1. It is used for the air supply of the first combustion chamber 2 and the injection of auxiliary fuel to realize the pyrolysis and gasification of the garbage in the first combustion chamber 2; the second combustion chamber 3 further incinerates the combustible gas produced by the first combustion chamber 2, which is equipped with The second burner 4 is used for the air supply of the second combustion chamber 3 and the injection of auxiliary fuel;

The flue gas circulation air supply system includes a flue gas booster fan 103, a heat exchanger 13, and a flue gas return pipeline 81; the heat exchanger 13 communicates with the flue gas outlet of the second combustion chamber through the flue gas pipeline bus; the flue gas The gas filter device 14 is installed at the flue gas outlet of the heat exchanger 13, and the flue gas return pipeline is a pipeline connected to the incinerator at the outlet of the flue gas filter device 14; wherein the flue gas booster fan 103 is installed on the flue gas return pipeline 81, Located at the beginning of the flue gas return pipeline; the flue gas generated by the second combustion chamber 3 is heat-exchanged by the heat exchanger 13, and then filtered by the flue gas filtering device 14 to remove particulate matter, and then discharged out of the system through the flue gas discharge pipeline 82 all the way. The other way is pressurized by the flue gas booster fan 103, and returned to the second combustion chamber 3 through the flue gas return pipeline 82. The function of the flue gas return is to increase the turbulence in the second combustion chamber 3, enhance the incineration effect, and make pollutants such as dioxin British precursors are less generated and completely decomposed, reducing pollutant emissions;

In this embodiment, the flue gas return pipeline 81 from the flue gas booster blower 103 to the second combustion chamber 3 is divided into two routes: one route 811 is returned to the second burner 4 in the second combustion chamber, and the meter 63 and Regulating valve 53; one route 812 is sent back to the circulating flue gas injection inlet 19 of the second combustion chamber, and there is a meter 64 and a regulating valve 54 on this pipeline 812;

In this embodiment, the flue gas exhaust pipeline 82 is a pipeline connecting the outlet of the flue gas filtering device 14 to the exhaust outlet of the system, including the flue gas purification device 16 and the induced draft fan 102; After the device 15 cools down, the pollutants in the flue gas are further removed by the flue gas purification device 16 and then discharged; the induced draft fan 102 is installed at the smoke exhaust outlet of the flue gas discharge pipeline 82;

In this embodiment, the flue gas waste heat heat exchanger 15 is located on the flue gas discharge pipeline 82 and before the flue gas purification device 16. The heat exchanger 15 is used for the cooling medium transported by the cooling medium pipeline 17 and the flue gas discharge. The heat exchange of the exhausted flue gas transported by the pipeline 82 cools the exhausted flue gas, and the heat obtained by the cooling medium can be recycled by facilities outside the system;

In this embodiment, an oxygen-enriched air supply system is also included, and the oxygen-enriched air supply system includes an oxygen-enriched air generating device 7, an oxygen booster fan 101 on the oxygen pipeline bus 9, an on-off valve 12, and a release valve 11; The air generating device 7 is connected to the oxygen booster fan 101 and then connected to the heat exchanger 13. The oxygen outlet end of the heat exchanger 13 is connected to a thermal oxygen main pipeline 9B, and the other ends of the thermal oxygen main pipeline 9B pass through the first thermal oxygen pipeline respectively. The branch line 91 communicates with the first burner 1 of the first combustion chamber 2, and communicates with the second burner 4 of the second combustion chamber 3 through the second thermal oxygen pipeline branch line 92; the oxygen-enriched air produced by the oxygen-enriched air generating device 7 passes through oxygen The pressurized fan 101 is pressurized and the heat exchanger 13 is preheated, and one path 91 is sent to the first burner 1 of the first combustion chamber 2 through the detection and adjustment of the meter 61 and the regulating valve 51, and the other path 92 is passed through the meter 62 and The detection and adjustment of the regulating valve 52 is sent to the second burner 4 of the second combustion chamber 3, and the oxygen-enriched air supply system improves the oxygen concentration in the air supply to the first combustion chamber 2 and the second combustion chamber 3, which can stabilize the first combustion chamber. The pyrolysis gasification process of the garbage in the second combustion chamber, and the combustible gas produced has a higher calorific value, which is beneficial to the incineration of the second combustion chamber 3. The oxygen-enriched air supply system also improves the combustion temperature of the second combustion chamber 3 and reduces pollutants such as secondary combustion. The production of oxin precursors, the oxygen-enriched air supply system reduces the consumption of auxiliary fuel and improves the heat utilization efficiency of the incinerator;

In this embodiment, the flue gas discharge pipeline also includes a flue gas purification device ₁₆ , which is used to neutralize the acidic components in the flue gas, so that acidic substances such as HCl and SO in the flue gas are removed;

In this embodiment, the type of the oxygen-enriched air generator 7 is a membrane separation oxygen generator;

In this embodiment, the operating temperature of the flue gas filtering device 14 is preferably 400°C. At this temperature, trapping fly ash and other particles can avoid the de novo synthesis of fly ash and components in the flue gas at 200-400°C. Heterogeneous catalytic reaction to reduce the catalytic synthesis of dioxins in the flue gas pipeline;

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, simplifications, equivalent replacements and improvements made within the spirit and principles of the present invention etc., should be included within the protection scope of the present invention.

Claims (10)

1. adopt a refuse pyrolysis gasification oxygen enrichment incinerator for flue gas recirculation mode, it is characterized in that, comprise incinerator main body and flue gas recirculation supply air system:

Described incinerator main body comprises a combustion room (2) and dual firing chamber (3), and combustion room (2) is for refuse pyrolysis gasification, and the fuel gas of generation delivers to dual firing chamber (3); At least one first burner (1) is equipped with in one combustion room (2), for an air-supply for combustion room (2) and spraying into of auxiliary fuel, realizes the pyrolytic gasification of combustion room (2) interior rubbish; Dual firing chamber (3) burns for the fuel gas produced combustion room (2), and it is equipped with the second burner (4), for the air-supply of dual firing chamber (3) and spraying into of auxiliary fuel;

Described flue gas recirculation supply air system comprises heat exchanger (13), flue gas booster fan (103) and flue gas loopback pipeline (81); Dual firing chamber (3) exhanst gas outlet is connected with heat exchanger (13) by flue gas pipeline bus (8), and heat exchanger (13) is connected to incinerator through flue gas loopback pipeline (81); Described flue gas booster fan (103) is arranged on flue gas loopback pipeline (81);

In work, the flue gas that dual firing chamber (3) produces is delivered to after heat exchanger (13) heat exchange through flue gas pipeline bus (8), one tunnel is outside outer comb line (82) the discharge system of flue gas, another road, through flue gas booster fan (103) pressurization, is recycled to dual firing chamber (3) through flue gas loopback pipeline (81).

2. refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1, it is characterized in that, flue gas booster fan (103) divides two-way to be connected to dual firing chamber (3) to the flue gas loopback pipeline of dual firing chamber (3), one tunnel first flue gas loopback pipeline branch line (811) is connected to second burner (4) of dual firing chamber (3), and road second flue gas loopback pipeline branch line (812) is connected to dual firing chamber's circulating flue gas entrance (19).

3. refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1, it is characterized in that, also comprise filtrating equipment of flue gas (14), filtrating equipment of flue gas (14) is arranged between heat exchanger (13) outlet and flue gas loopback pipeline (81) entrance, in minimizing flue gas, particle is to the wearing and tearing of flue gas booster fan (103), and/or the running temperature of filtrating equipment of flue gas (14) is preferably 500-400 DEG C, reduce catalyzing and synthesizing of flue Zhong bioxin.

4. refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1, is characterized in that, also comprise oxygen-enriched blasting system,

Described oxygen-enriched blasting system comprises oxygen-enriched air generating device (7) and oxygen booster fan (101), and both are switched to heat exchanger (13) after being connected; Heat exchanger (13) oxygen outlet end is connected with hot oxygen main pipe line (9B), and hot oxygen main pipe line (9B) is communicated with second burner (4) of dual firing chamber (3) by the second hot oxygen pipeline branch line (92);

During work, the oxygen-enriched air that oxygen-enriched air generating device (7) produces, through oxygen booster fan (101) pressurization and heat exchanger (13) preheating, through hot oxygen main pipe line (9B), by the second hot oxygen pipeline branch line (92), deliver to second burner (4) of dual firing chamber (3).

5. the refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1 or 3, it is characterized in that, the outer comb line (82) of described flue gas is the pipeline that filtrating equipment of flue gas (14) outlet is connected to system smoke evacuation outlet, comprises smoke eliminator (16) and air-introduced machine (102); Discharged gas fume, after smoke gas afterheat heat exchanger (15) cooling, is arranged outside after removing the pollutant in flue gas further through smoke eliminator (16); Described air-introduced machine (102) is arranged on the smoke evacuation outlet of the outer comb line (82) of flue gas.

6. refuse pyrolysis gasification oxygen enrichment incinerator according to claim 5, is characterized in that, also comprise smoke gas afterheat heat exchanger (15) and/or cooling medium pipeline (17); Described smoke gas afterheat heat exchanger (15) is for the flue gas cool-down by outer row, and described cooling medium pipeline (17) is for reclaiming discharged gas fume waste heat.

7. the refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1-7, it is characterized in that, the described first hot oxygen pipeline branch line (91), the second hot oxygen pipeline branch line (92), flue gas pipeline bus (8), the first flue gas loopback pipeline branch line (811) and the second flue gas loopback pipeline branch line (812) are provided with gauge table and control valve.

8. refuse pyrolysis gasification oxygen enrichment incinerator according to claim 4, it is characterized in that, described hot oxygen main pipe line (9B) also oxygen pipeline branch line (91) hot with first is connected, the first hot oxygen pipeline branch line other end is communicated with first burner (1) firing room (2), for by the oxygen-enriched air after heat exchanger (13) preheating, delivered to first burner (1) of a combustion room (2) by the first hot oxygen pipeline branch line (91).

9. the refuse pyrolysis gasification oxygen enrichment incinerator according to claim 4 or 6, it is characterized in that, described oxygen-enriched air preheating is realized by smoke gas afterheat heat exchanger (15), described heat exchanger (13) adds cooling medium pipeline (17), for Mist heat recovering.

10. the refuse pyrolysis gasification oxygen enrichment incinerator according to claim 1-9, it is characterized in that, described incinerator also comprises air supply line, described air supply line comprises supercharging air blower fan (104), heat exchanger (13) and air line (18), supercharging air blower fan (104), for after air pressurized being sent into heat exchanger (13) heat exchange, sends into combustion room (2) through air line (18).