CN219713386U - Rotational flow mixed type waste gas incinerator - Google Patents

Abstract

The utility model provides a cyclone mixed type waste gas incinerator, which comprises an incinerator body and a combustor, wherein the incinerator body comprises an incinerator shell with a hearth, the combustor comprises a shell, a combustion flame path and a mixed gas fuel spray gun, the shell is provided with a secondary combustion air inlet, a secondary combustion air cavity is formed between the shell and the outer wall of the combustion flame path, the inlet of the secondary combustion air cavity is communicated with the secondary combustion air inlet, and the outlet of the secondary combustion air cavity is communicated with the hearth; the combustion area of the combustion flame path is communicated with the hearth, the furnace shell is provided with an exhaust gas input structure at one side close to the burner, the exhaust gas input structure comprises a plurality of exhaust gas spray pipes, and the exhaust gas spray pipes penetrate through the furnace shell in a beveling way with the furnace shell; the utility model ensures that the waste gas, the high-temperature flue gas and the secondary combustion air are simultaneously subjected to vertical cross type cyclone mixing, improves the mixing uniformity, avoids incomplete combustion caused by factors such as bias flow, uneven mixing and the like, and greatly reduces the reaction intermediate product CO.

Description

Rotational flow mixed type waste gas incinerator

Technical Field

The utility model relates to the technical field of petrochemical waste gas treatment, in particular to a cyclone mixed waste gas incinerator.

Background

In the industries of petroleum refining, chemical production and coal deep processing, various devices generate waste gas in the production process, and the waste gas contains a certain amount of hydrocarbons and trace H ₂ In order to prevent the toxic and harmful components such as S, HCN, S and the like from entering the atmosphere to pollute the environment, the waste gas generated in the production process is required to be burnt and decomposed into CO through high-temperature oxidation reaction ₂ 、H ₂ O、SO ₂ 、N ₂ And after the post-purification treatment, discharging.

In the prior art, the waste gas is burnt at high temperature through a waste gas incinerator and toxic and harmful components are oxidized and decomposed at high temperature, so that the aim of purifying treatment is fulfilled. However, the existing incinerator structure has defects, especially the spraying direction and the structural form of the existing waste gas entering the incinerator. The existing two forms are that the waste gas inlet is vertical to the hearth, the central extension line is intersected with the axis of the furnace, waste gas forms an air curtain in the furnace, and under the action of the air curtain formed in the waste gas furnace, high-temperature flue gas burnt by the burner is easy to periodically fluctuate in the furnace pressure, so that the furnace vibration occurs, and potential safety hazards are brought to the long-period operation of the furnace. The other is that the waste gas inlet is inclined to the rear part of the hearth by a certain angle, the central extension line is intersected with the axis of the furnace, the waste gas is seriously deviated in the furnace and is unevenly mixed with air and high-temperature flue gas, the reaction residence time is far lower than the theoretical reaction residence time, the burning is incomplete, the flue gas at the outlet of the furnace contains unburned toxic and harmful components, and a large amount of CO occurs. Not only causes the increase of the fuel consumption of the incineration device, but also seriously affects the stable operation of the whole device, thereby wasting energy and polluting the environment.

In order to solve the above problems existing in the current exhaust gas incineration process, it is necessary to develop a new exhaust gas incinerator.

Disclosure of Invention

In view of the above, the present utility model aims to provide a cyclone mixing type waste gas incinerator, so as to solve the problem of low mixing uniformity degree of waste gas, air and high temperature flue gas in the incinerator in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the swirl mixing type waste gas incinerator comprises an incinerator body and a combustor, wherein the combustor is arranged at the front end of the incinerator body, the incinerator body comprises an incinerator shell with a hearth, the combustor comprises a shell, a combustion flame path and a mixed gas fuel spray gun, the shell is provided with a secondary combustion air inlet, a secondary combustion air cavity is formed between the shell and the outer wall of the combustion flame path, the inlet of the secondary combustion air cavity is communicated with the secondary combustion air inlet, and the outlet of the secondary combustion air cavity is communicated with the hearth; the combustion area of the combustion flame path is communicated with the hearth, an exhaust gas input structure is arranged on one side, close to the burner, of the furnace shell, the exhaust gas input structure comprises a plurality of exhaust gas spray pipes, the exhaust gas spray pipes penetrate through the furnace shell in a beveling mode with the furnace shell, an included angle between the central axis of each exhaust gas spray pipe and the inner diameter of the furnace shell is recorded as A, and the included angle A is 15-25 degrees.

Further, the exhaust gas spray pipes penetrate through the furnace shell in a mode of circumferential array along the furnace shell, and on projection along the central axis direction of the incinerator body, the extension line of the central axis of any exhaust gas spray pipe in the direction of the hearth is tangential to the combustion flame path.

Further, the waste gas input structure comprises a waste gas collecting cavity, the waste gas collecting cavity is arranged on the outer wall of the furnace shell in a surrounding mode, a waste gas inlet is arranged at the inlet of the waste gas collecting cavity, and the outlet of the waste gas collecting cavity is communicated with the waste gas spray pipe.

Further, a baffle ring is arranged on the inner wall of the furnace shell and divides the furnace chamber into a front burning zone and a rear burning zone, the baffle ring is provided with a flue gas channel, the front burning zone is communicated with the rear burning zone through the flue gas channel, and the waste gas input structure is communicated with the front burning zone.

Further, the rear incineration area is far away from the front incineration area, and a flower wall is arranged at one end of the rear incineration area.

Further, the gas-mixing fuel spray gun is provided with a steam inlet and a fuel gas inlet, a first cyclone is arranged in the gas-mixing fuel spray gun, one side of the first cyclone is provided with the steam inlet, and the other side of the first cyclone is provided with the fuel gas inlet.

Further, the steam inlet is provided with a one-way valve.

Further, the burner comprises a startup gas lance which is arranged inside the gas-fuel mixture lance and is arranged coaxially with the gas-fuel mixture lance, and the first swirler is positioned between the outer wall of the startup gas lance and the inner wall of the gas-fuel mixture lance.

Further, a secondary combustion air cyclone is arranged at the outlet of the secondary combustion air cavity, and secondary combustion air is sprayed into the hearth through the secondary combustion air cyclone.

Further, an air distributor is arranged in the combustor, a first-stage combustion air inlet is formed in the shell, a first-stage combustion air cavity is formed between the shell and the air distributor, the inlet of the first-stage combustion air cavity is communicated with the first-stage combustion air inlet, and the outlet of the first-stage combustion air cavity is sequentially communicated with the air distributor and a first-stage combustion air cyclone arranged in the air distributor; the rotational flow directions of the primary combustion air swirler and the secondary combustion air swirler are consistent.

Compared with the prior art, the cyclone mixed type waste gas incinerator has the following advantages:

according to the cyclone mixed type waste gas incinerator, the waste gas spray pipe is arranged on one side close to the combustor, waste gas sprayed into a hearth through the waste gas spray pipe is enabled to form a radial cyclone flow field in the incinerator through a multi-pipe inclined structure, and a hollow air curtain is formed at the center of the flow field; in addition, the waste gas and the high-temperature flue gas (formed by fuel combustion) sprayed to the hearth by the combustion flame path and the secondary combustion air sprayed to the hearth by the secondary combustion air cavity are simultaneously subjected to vertical cross type cyclone mixing; the form can not only prevent the pressure fluctuation of the high-temperature flue gas at the outlet of the combustion flame path, but also improve the uniformity of mixing of the waste gas, the high-temperature flue gas and the secondary combustion air, avoid incomplete combustion caused by factors such as bias flow, uneven mixing and the like, and greatly reduce the CO as a reaction intermediate product.

In addition, the burner is provided with the supply of the secondary combustion air, so that the total amount of the combustion air can be flexibly adjusted, and the condition that the flame of the burner is unstable and even extinguishes due to the overlarge supply amount of the primary combustion air in a conventional supply mode is avoided. Meanwhile, the secondary combustion air surrounds the periphery of the combustion flame path, so that the temperature of the outer surface of the flame path can be reduced, the service life of the refractory material is prolonged, the secondary combustion air is preheated, and the impact on flame due to the fact that the temperature of the air is too low is reduced. For burning ammonia-containing tail gas, the secondary combustion air can also reduce the temperature of high-temperature flue gas generated by combustion flame, and reduce NH in the tail gas ₃ The oxidation reaction of (2) reduces the generation of fuel type NOx while controlling the generation of thermal type NOx during combustion, is beneficial to realizing the ultralow emission of NOx and meets the environmental protection requirement of burning the ammonia-containing tail gas.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a cyclone mixed type exhaust gas incinerator according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of an exhaust gas inlet swirl structure of a swirl-flow mixed exhaust gas incinerator according to an embodiment of the utility model.

Reference numerals illustrate:

1. starting a gas spray gun; 101. a startup gas inlet; 2. a gas-mixed fuel lance; 201. a steam inlet; 202. a fuel gas inlet; 203. a first cyclone; 3. a primary combustion air swirler; 301. a primary combustion air inlet; 302. a secondary combustion air inlet; 4. a housing; 5. an air distributor; 6. a tapered inlet; 7. a first-stage combustion-supporting air cavity; 8. a secondary combustion-supporting air cavity; 9. a combustion flame path; 10. a combustion zone; 11. a secondary combustion air cyclone; 12. an exhaust gas nozzle; 13. an exhaust gas collecting chamber; 1301. an exhaust gas inlet; 14. a front incineration zone; 15. a baffle ring; 16. a refractory layer; 17. a furnace housing; 18. a post-incineration zone; 19. and (5) flower walls.

Detailed Description

The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In order to solve the problem of low mixing uniformity of exhaust gas, air and high-temperature flue gas in the incinerator in the prior art, this embodiment provides a cyclone mixing type exhaust gas incinerator, as shown in fig. 1-2, the exhaust gas incinerator comprises an incinerator body and a burner, and the burner is arranged at the front end (inlet end) of the incinerator body.

The incinerator body comprises an incinerator shell 17 with a hearth, the combustor comprises a shell 4, a combustion flame path 9 and a gas-mixing fuel spray gun 2, steam and fuel gas are mixed in the gas-mixing fuel spray gun 2, the shell 4 is provided with a secondary combustion air inlet 302, a secondary combustion air cavity 8 is formed between the shell 4 and the outer wall of the combustion flame path 9, the inlet of the secondary combustion air cavity 8 is communicated with the secondary combustion air inlet 302, and the outlet of the secondary combustion air cavity 8 is communicated with the hearth of the incinerator body; the combustion zone 10 of the combustion flame path 9 is communicated with the hearth of the incinerator body, the side, close to the burner, of the incinerator shell 17 is provided with an exhaust gas input structure, the exhaust gas input structure comprises a plurality of exhaust gas spray pipes 12, the exhaust gas spray pipes 12 penetrate through the incinerator shell 17 in a beveling mode with the incinerator shell 17, the position of the exhaust gas spray pipes 12 is taken as a reference, and an included angle between the central axis of the exhaust gas spray pipes 12 and the inner diameter of the incinerator shell 17 is recorded as A, and the included angle A is 15-25 degrees. That is, any one of the exhaust gas nozzles 12 is beveled with the furnace housing 17 at an angle of 15 DEG to 25 DEG; accordingly, to avoid ambiguity, referring to FIG. 2, the "inside diameter" is understood to be the line along which the inside diameter of the furnace housing 17 corresponds to the position of the exhaust lance 12.

The exhaust gas spray pipe 12 is arranged at one side close to the burner, and the exhaust gas spray pipe 12 is in a multi-pipe inclined structure, so that the exhaust gas sprayed into a hearth through the exhaust gas spray pipe 12 can form a radial swirl flow field in the furnace, and a hollow air curtain is formed at the center of the flow field; in addition, the waste gas and the high-temperature flue gas (formed by fuel combustion) sprayed to the hearth by the combustion flame path 9 and the secondary combustion air sprayed to the hearth by the secondary combustion air cavity 8 are simultaneously subjected to vertical cross type cyclone mixing; the form can not only prevent the pressure fluctuation of the high-temperature flue gas at the outlet of the combustion flame path, but also improve the uniformity of mixing of the waste gas, the high-temperature flue gas and the secondary combustion air, avoid incomplete combustion caused by factors such as bias flow, uneven mixing and the like, and greatly reduce the CO as a reaction intermediate product.

In addition, the burner is provided with the supply of the secondary combustion air, so that the total amount of the combustion air can be flexibly adjusted, and the condition that the flame of the burner is unstable and even extinguishes due to the overlarge supply amount of the primary combustion air in a conventional supply mode is avoided. Meanwhile, the secondary combustion air surrounds the periphery of the combustion flame path, so that the temperature of the outer surface of the flame path can be reduced, the service life of the refractory material is prolonged, the secondary combustion air is preheated, and the impact on flame due to the fact that the temperature of the air is too low is reduced. For burning ammonia-containing tail gas, the secondary combustion air can also reduce the temperature of high-temperature flue gas generated by combustion flame, and reduce NH in the tail gas ₃ The oxidation reaction of (2) reduces the generation of fuel type NOx while controlling the generation of thermal type NOx during combustion, is beneficial to realizing the ultralow emission of NOx and meets the environmental protection requirement of burning the ammonia-containing tail gas.

The exhaust gas nozzles 12 extend through the furnace shell 17 in a circumferential array along the furnace shell 17; in addition, referring to the view angle of fig. 2, on the projection along the central axis direction of the incinerator body, the central axis of any one exhaust gas spray pipe 12 is tangential to the combustion flame path 9 (projection) towards the extension line in the hearth, and as the high-temperature flue gas is sprayed out from the combustion area 10 in the center of the combustion flame path 9, the secondary combustion air is sprayed out from the periphery of the combustion flame path 9, on the basis of the circumferential array, the central axis of the exhaust gas spray pipe 12 is tangential to the combustion flame path 9 (projection), so that the exhaust gas forms a swirling action with the high-temperature flue gas and the secondary combustion air simultaneously, and the exhaust gas is mixed with the high-temperature flue gas and the secondary combustion air in a more uniform vertical intersecting manner, thereby being beneficial to further improving the mixing uniformity degree among the exhaust gas, the high-temperature flue gas and the secondary combustion air. Preferably, the outlet flow rate of the exhaust gas nozzle 12 is 20m/s to 40m/s (i.e. the flow rate of the exhaust gas entering the hearth); the central axis of the exhaust gas lance 12 is illustrated in fig. 2 by the dashed line (centerline) in the exhaust gas lance 12.

The exhaust gas input structure comprises an exhaust gas collecting cavity 13, the exhaust gas collecting cavity 13 is arranged on the outer wall of the furnace shell 17 in a surrounding mode, an exhaust gas inlet 1301 is formed in the inlet of the exhaust gas collecting cavity 13, and the outlet of the exhaust gas collecting cavity 13 is communicated with the exhaust gas spray pipe 12, so that external exhaust gas can enter the hearth. In the utility model, the surrounding length and the number of the exhaust gas concentration chambers 13 are not excessively limited, and the exhaust gas concentration chambers can be a complete annular chamber which surrounds the furnace shell 17 for one circle at 360 degrees; the exhaust gas nozzle 12 may be provided with a plurality of independent chambers, each of which is in one-to-one correspondence and communicates with each other, or may be provided with one chamber which communicates with two or more exhaust gas nozzles 12, and each of which may be of any shape, such as approximately rectangular, square, annular, spherical, irregular, or the like. The utility model is preferably an annular cavity and has an arc length corresponding to any angle of 0-360 degrees of the circumference of the furnace housing 17. In the actual manufacturing process, steel plates with corresponding bending shapes can be welded on the outer wall of the furnace shell 17 and sealed to form the waste gas collecting cavity 13, or the waste gas collecting cavity 13 can be directly manufactured by adopting a pipe, and the pipe cavity is used as the corresponding waste gas collecting cavity 13.

The exhaust gas collecting chambers 13 may be arranged in a plurality of rows or in a single row on the circumferential wall of the furnace housing 17. Accordingly, the exhaust gas nozzles 12 may be arranged in a plurality of rows or a single row, and even in the same exhaust gas collecting chamber 13, a plurality of exhaust gas nozzles 12 may be arranged in a plurality of rows or a single row. It should be noted that a "multi-row" is also understood to mean a "multi-layer" arrangement in different cross sections.

For the hearth, a baffle ring 15 is arranged on the inner wall of the furnace shell 17 to divide the hearth into a front burning zone 14 and a rear burning zone 18, the baffle ring 15 is provided with a flue gas channel, the front burning zone 14 is communicated with the rear burning zone 18 through the flue gas channel, and the waste gas input structure is communicated with the front burning zone 14, so that the waste gas spray pipe 12 can spray waste gas directly into the front burning zone 14. Therefore, by arranging the baffle ring 15, after the waste gas, the high-temperature flue gas and the secondary combustion air are mixed by the cyclone in the front burning zone 14, the waste gas, the high-temperature flue gas and the secondary combustion air flow to the rear burning zone 18 after passing through the baffle ring 15 in the hearth, the mixing strength is further improved under the turbulent flow effect of the baffle ring 15, and the mixing uniformity degree among the waste gas, the high-temperature flue gas and the secondary combustion air is further improved.

The cross-sectional shape of the baffle ring 15 may be square, rectangular or other shapes, and in the present utility model, the cross-sectional shape of the baffle ring 15 is a wedge shape with a wide end and a narrow end, and the narrow end of the wedge shape is one end close to the central axis of the incinerator body. The flue gas channel cross section area at the baffle ring 15 is smaller than the cross section area of the front incineration zone 14, so that the warm flue gas, the secondary combustion air and the waste gas in the front incineration zone can be fully stopped and fully combusted as far as possible.

The end of the rear incineration zone 18 far away from the front incineration zone 14 is provided with a patterned wall 19 so that the flue gas is discharged uniformly, and the flue gas can enter the subsequent process equipment more uniformly through the patterned wall 19. The patterned wall 19 is a cylindrical shaped refractory material stacking structure or a rectangular shaped refractory material stacking structure.

In addition, the length of the furnace shell 17, the specific setting positions of the baffle ring 15 and the exhaust gas input structure are suitable for meeting the design requirement of 'more than 1 second' in the theoretical design of the reaction residence time in the furnace so as to meet the requirement of full reaction of the exhaust gas, ensure that toxic and harmful gases in the exhaust gas can be completely decomposed, reduce the combustion temperature to a certain extent, and be beneficial to controlling the generation amount of thermal NOx for the incineration of nitrogen-containing substances.

The inner wall of the furnace shell 17 is a refractory layer 16 which is made of conventional refractory materials so as to meet the requirements of fire resistance and high temperature resistance of the incinerator. Accordingly, the inner cavity of the combustion flame 9 is also made of refractory material.

For the burner, the gas-mixed fuel spray gun 2 is provided with a steam inlet 201 and a fuel gas inlet 202, a first cyclone 203 is arranged in the gas-mixed fuel spray gun 2, one side of the first cyclone 203 is provided with the steam inlet 201, and the other side is provided with the fuel gas inlet 202; therefore, by arranging the mixed gas fuel spray gun 2, steam and fuel gas are fully mixed in the mixed gas fuel spray gun 2 in advance, so that the heat value of the mixed gas fuel is reduced, the adiabatic combustion temperature is reduced, the combustion flame temperature is low, and for burning nitrogen-containing substances, the generation of thermal NOx during combustion can be effectively controlled.

In the case of providing the steam inlet 201, the fuel gas inlet 202, and the first cyclone 203, the steam inlet 201, the first cyclone 203, and the fuel gas inlet 202 may be provided in this order, or the fuel gas inlet 202, the first cyclone 203, and the steam inlet 201 may be provided in this order, along the entire flow direction of the material medium in the gas-mixed fuel lance 2. The present utility model does not impose excessive limitations thereon.

As a preferred embodiment of the present utility model, considering the channeling of the fuel gas, for the gas-mixing fuel spray gun 2, the steam inlet 201, the first cyclone 203, and the fuel gas inlet 202 are sequentially disposed along the overall flow direction of the material medium, so that the steam is actively mixed with the fuel gas under the driving of the first cyclone 203. In addition, the steam inlet 201 is provided with a one-way valve to prevent fuel gas from entering the steam pipe network through the steam inlet 201 when the steam pipe is not in steam.

In the present utility model, a mixture of steam and fuel is sprayed from a gas-mixed fuel spray gun 2, contacts primary combustion air in a combustion flame path 9, and starts combustion. For the supply of the primary combustion air, a conventional combustion air supply structure in the prior art can be adopted, and a primary combustion air related structure further proposed by the utility model can also be adopted.

Specifically, the combustor is internally provided with an air distributor 5, the shell 4 is provided with a primary combustion air inlet 301, a primary combustion air cavity 7 is formed between the shell 4 and the air distributor 5, the inlet of the primary combustion air cavity 7 is communicated with the primary combustion air inlet 301, and the outlet of the primary combustion air cavity 7 is sequentially communicated with the air distributor 5 and the primary combustion air cyclone 3 arranged in the air distributor 5. For the specific structure of the air distributor 5 and the specific arrangement in the burner, reference is made directly to the prior art, and will not be repeated here. Preferably, the first-stage combustion-supporting air cavity 7 and the second-stage combustion-supporting air cavity 8 are adjacently arranged, an annular partition plate is arranged between the first-stage combustion-supporting air cavity 7 and the second-stage combustion-supporting air cavity 8, and space separation is carried out through the annular partition plate, so that the compactness of the structure of the burner is improved, and the overall occupied space of the burner is reduced.

The outlet of the secondary combustion air cavity 8 is provided with a secondary combustion air cyclone 11, and secondary combustion air is sprayed into the hearth through the secondary combustion air cyclone 11; the rotational flow directions of the primary combustion air swirler 3 and the secondary combustion air swirler 11 are consistent.

In the normal combustion process, taking the incineration of ammonia-containing tail gas as an example, the secondary combustion air wraps the outer side of high-temperature flue gas sprayed out of the combustion flame path 9, so that the full degree of fuel combustion can be improved. And simultaneously, the temperature of the high-temperature flue gas is reduced. The temperature of the high-temperature flue gas is reduced to below 1000 ℃, and when the high-temperature flue gas is mixed and contacted with ammonia-containing tail gas sprayed from the incinerator body, the temperature is controlled below 1000 ℃ and the optimal control temperature is 900 ℃. The lower the temperature, the lower the rate of the ammoxidation reaction and the less converted to fuel-type NOx.

Considering the operation requirement of the burner in the start-up phase, the burner comprises a start-up gas lance 1, the start-up gas lance 1 is arranged inside a mixed gas fuel lance 2 and is coaxially arranged with the mixed gas fuel lance 2, and the first swirler 203 is positioned between the outer wall of the start-up gas lance 1 and the inner wall of the mixed gas fuel lance 2. The startup gas spray gun 1 is only used in the startup heating and baking stage of the device, startup fuel gas is supplemented into the startup gas spray gun 1 through the startup gas inlet 101, the incinerator temperature is low in the startup baking stage, the fuel consumption is small, the gap between the incinerator temperature and the normal working condition is large, and the gas mixing fuel spray gun 2 cannot meet the startup requirement. Therefore, the startup gas spray gun 1 is additionally arranged, the startup heating baking furnace of the device is considered, the operation elasticity ratio of the burner can be improved, and the full-working-condition coverage is achieved.

The combustion flame path 9 is arranged in the shell 4, the combustion flame path 9 is formed by pouring or building refractory materials, an internal cavity of the combustion flame path 9 is a combustion area 10, a space is provided for fuel combustion, and a primary combustion-supporting air cavity 7 and a secondary combustion-supporting air cavity 8 are arranged outside the combustion flame path 9. The combustion flame path 9 is provided with a tapered inlet 6, the tapered inlet 6 is tapered, and the sectional area of the tapered inlet 6 is gradually reduced along the whole flow direction of the material medium in the gas-mixing fuel spray gun 2.

The discharge port of the start-up gas lance 1 and the discharge port of the gas-fuel mixture lance 2 are both located in the conical inlet 6 for injecting the respective substances into the combustion zone 10 via the conical inlet 6.

The primary combustion air enters the primary combustion air cavity 7 through the primary combustion air inlet 301, enters the primary combustion air cyclone 3 through the air distributor 5, and enters the combustion zone 10 in the combustion flame path 9 through the conical inlet 6 of the combustion flame path to be mixed with fuel gas for combustion. The secondary combustion air enters the secondary combustion air cavity 8 through the secondary combustion air inlet 302 and is sprayed into the hearth through the secondary combustion air cyclone 11.

In addition, the burner may be further provided with a pilot burner (not shown), and for fixing the gas-mixed fuel spray gun 2 and the pilot burner, the fixing manner of the conventional spray gun and the pilot burner may be directly referred to, and the gas-mixed fuel spray gun 2 and the pilot burner may be fixedly provided at the head of the housing 4.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a whirl mixed type waste gas incinerator, includes incinerator body and combustor, and the combustor is established in the front end of incinerator body, its characterized in that, incinerator body includes stove outer covering (17) that have the furnace, the combustor includes casing (4), burning flame path (9), gas mixing fuel spray gun (2), casing (4) set up second grade combustion air entry (302), form second grade combustion air chamber (8) between the outer wall of casing (4) and burning flame path (9), the entry and the second grade combustion air entry (302) of second grade combustion air chamber (8) communicate, the export and the furnace of second grade combustion air chamber (8) communicate; the combustion zone (10) of the combustion flame path (9) is communicated with a hearth, the furnace shell (17) is provided with an exhaust gas input structure at one side close to the burner, the exhaust gas input structure comprises a plurality of exhaust gas spray pipes (12), the exhaust gas spray pipes (12) penetrate through the furnace shell (17) in a beveling mode with the furnace shell (17), an included angle between the central axis of the exhaust gas spray pipes (12) and the inner diameter of the furnace shell (17) is recorded as A, and the included angle A is 15-25 degrees.

2. A swirl-mixing type exhaust gas incinerator according to claim 1, characterized in that the exhaust gas nozzles (12) extend through the furnace housing (17) in a circumferential array along the furnace housing (17), and that the extension of the central axis of any exhaust gas nozzle (12) towards the furnace chamber is tangential to the combustion flame path (9) in the projection along the direction of the central axis of the incinerator body.

3. A swirl-mixing type exhaust gas incinerator according to claim 1, characterized in that the exhaust gas input structure comprises an exhaust gas collecting chamber (13), the exhaust gas collecting chamber (13) is arranged around the outer wall of the furnace shell (17), an exhaust gas inlet (1301) is arranged at the inlet of the exhaust gas collecting chamber (13), and the outlet of the exhaust gas collecting chamber (13) is communicated with the exhaust gas spray pipe (12).

4. The cyclone mixed type waste gas incinerator according to claim 1, wherein a baffle ring (15) is arranged on the inner wall of the incinerator shell (17) to divide a hearth into a front incineration zone (14) and a rear incineration zone (18), the baffle ring (15) is provided with a flue gas channel, the front incineration zone (14) is communicated with the rear incineration zone (18) through the flue gas channel, and the waste gas input structure is communicated with the front incineration zone (14).

5. A swirl-mixing type waste gas incinerator according to claim 4, characterised in that the rear incineration zone (18) is provided with a wall (19) at the end remote from the front incineration zone (14).

6. The cyclone mixed type waste gas incinerator according to claim 1, wherein the gas mixing fuel spray gun (2) is provided with a steam inlet (201) and a fuel gas inlet (202), a first cyclone (203) is arranged inside the gas mixing fuel spray gun (2), one side of the first cyclone (203) is provided with the steam inlet (201), and the other side of the first cyclone is provided with the fuel gas inlet (202).

7. A swirl mixing type exhaust gas incinerator according to claim 6, characterised in that the steam inlet (201) is provided with a one-way valve.

8. The swirling-type exhaust gas incinerator according to claim 6, characterized in that the burner comprises a start-up gas lance (1), the start-up gas lance (1) being arranged inside the gas-fuel mixture lance (2) and being arranged coaxially to the gas-fuel mixture lance (2), the first swirler (203) being located between the outer wall of the start-up gas lance (1) and the inner wall of the gas-fuel mixture lance (2).

9. A swirl mixing type exhaust gas incinerator according to claim 1, characterized in that the outlet of the secondary combustion air chamber (8) is provided with a secondary combustion air swirler (11), and that secondary combustion air is injected into the furnace via the secondary combustion air swirler (11).

10. The cyclone mixed type waste gas incinerator according to claim 9, wherein an air distributor (5) is arranged in the combustor, a primary combustion air inlet (301) is formed in the shell (4), a primary combustion air cavity (7) is formed between the shell (4) and the air distributor (5), the inlet of the primary combustion air cavity (7) is communicated with the primary combustion air inlet (301), and the outlet of the primary combustion air cavity (7) is sequentially communicated with the air distributor (5) and a primary combustion air cyclone (3) arranged in the air distributor (5); the rotational flow direction of the primary combustion air swirler (3) is consistent with that of the secondary combustion air swirler (11).