CN214249620U

CN214249620U - Secondary combustion chamber with combustion nozzle

Info

Publication number: CN214249620U
Application number: CN202023044284.4U
Authority: CN
Inventors: 司徒达志; 陈祎; 刘金和; 陆杰; 李晴; 周江; 颜丽媛
Original assignee: China General Nuclear Power Corp; China Nuclear Power Technology Research Institute Co Ltd; CGN Power Co Ltd
Current assignee: China General Nuclear Power Corp; China Nuclear Power Technology Research Institute Co Ltd; CGN Power Co Ltd; China Nuclear Power Institute Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-09-21
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a secondary combustion chamber with a combustion nozzle, which comprises a secondary combustion chamber and a combustion nozzle arranged on the secondary combustion chamber; the secondary combustion chamber comprises a furnace body, a smoke inlet arranged at the upper end of the furnace body, at least one secondary air pipe arranged on the side surface of the furnace body and a smoke outlet arranged at the lower end of the furnace body; the combustion nozzle comprises an air inlet cavity arranged at the periphery of the smoke inlet, at least one air inlet pipe arranged on the air inlet cavity and a plurality of spinning disks; the outlet of the air inlet chamber is communicated with the interior of the furnace body; the plurality of rotational flow sheets are arranged at the outlet at intervals along the circumferential direction of the air inlet chamber and change the airflow from the axial flow into rotational flow to enter the furnace body. The utility model discloses a take combustion nozzle's second combustion chamber sets up combustion nozzle in the import of second combustion chamber, makes the air get into with the whirl mode and form strong torrent with the flue gas mixture that gets into the second combustion chamber, greatly strengthens the mixing ability of air and flue gas, promotes the combustion effect, reduces harmful components's such as dioxin, CO content in the flue gas.

Description

Secondary combustion chamber with combustion nozzle

Technical Field

The utility model relates to a second combustion chamber especially relates to a second combustion chamber of area burning shower nozzle.

Background

At present, incineration is the best treatment means for harmlessness and reduction of solid wastes. The solid waste incineration treatment mainly comprises a grate type, a fluidized bed type, a rotary kiln type and the like, and a secondary combustion chamber is generally arranged behind the solid waste incineration treatment for completely combusting the flue gas, so that the emission of gas pollutants is reduced.

Because the solid waste is various in types and complex in components, when the fluctuation range of the heat value and the combustible content of the solid waste is large, the traditional secondary combustion chamber cannot achieve an ideal treatment effect, and the content of harmful components such as dioxin, CO and the like in smoke exceeds the standard, so that the environment is greatly harmed. The main reason for this is the insufficient mixing of air and combustible gas. Therefore, it is an urgent need to find a secondary combustion chamber structure with a wide processing range and enhanced air and combustible gas mixing capability.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that, to the above-mentioned prior art defect, a take combustion nozzle's second combustion chamber is provided.

The utility model provides a technical scheme that its technical problem adopted is: providing a secondary combustion chamber with a combustion nozzle, which comprises a secondary combustion chamber body and the combustion nozzle arranged on the secondary combustion chamber body; the secondary combustion chamber body comprises a furnace body, a smoke inlet arranged at the upper end of the furnace body, at least one secondary air pipe arranged on the furnace wall of the furnace body, and a smoke outlet arranged at the lower end of the furnace body;

the combustion nozzle comprises an air inlet cavity arranged at the periphery of the smoke inlet, at least one air inlet pipe arranged on the air inlet cavity and a plurality of spinning disks;

the outlet of the air inlet chamber is communicated with the interior of the furnace body; the plurality of the rotational flow sheets are arranged at the outlet at intervals along the circumferential direction of the air inlet chamber and change the airflow from the axial flow into rotational flow to enter the furnace body.

Preferably, the mounting angle of the swirl plate is inclined by 10 ° to 45 ° to the axial direction of the air inlet chamber.

Preferably, the incident angle of the secondary air pipe is eccentric 0-20 degrees relative to the center of the furnace body.

Preferably, the included angle between the secondary air pipe and the horizontal direction is +/-30 degrees.

Preferably, the spinning disk is a high-temperature resistant ceramic plate or a high-temperature resistant alloy plate.

Preferably, the outer wall of the air inlet chamber is built by refractory profiled bricks.

Preferably, the secondary combustion chamber body comprises a plurality of secondary air pipes; the plurality of secondary air pipes form at least one air inlet pipe layer;

and the secondary air pipes on the same air inlet pipe layer are uniformly distributed at intervals along the circumferential direction of the furnace body and are at the same height.

Preferably, the second combustion chamber body further comprises at least one auxiliary burner which is arranged on the furnace wall of the furnace body and communicated with the interior of the furnace body.

Preferably, the auxiliary burner is obliquely inserted on the furnace wall of the furnace body relative to the horizontal plane.

Preferably, the second combustion chamber body further comprises an ash discharge machine arranged below the furnace body, and an ash discharge port communicated with the ash discharge machine is arranged at the bottom of the furnace body.

The utility model discloses a take combustion nozzle's second combustion chamber sets up combustion nozzle in the import of second combustion chamber, makes the air get into with the whirl mode and form strong torrent with the flue gas mixture that gets into the second combustion chamber, greatly strengthens the mixing ability of air and flue gas, promotes the combustion effect, reduces harmful components's such as dioxin, CO content in the flue gas.

The utility model discloses compare in conventional two combustion chambers, under the same handling capacity, obviously reduce two combustion chambers's size, the structure is simple relatively, saves the cost, improves combustion efficiency.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic perspective view of a second combustion chamber with a burner head according to an embodiment of the present invention;

fig. 2 is a schematic sectional view of a second combustion chamber with a burner head according to an embodiment of the present invention;

FIG. 3 is a top view of the second combustion chamber of FIG. 2;

fig. 4 is an enlarged schematic view of a portion of a combustion nozzle in the second combustion chamber shown in fig. 2.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the second combustion chamber with a burner of the present invention includes a second combustion chamber body 10 and a burner 20 disposed on the second combustion chamber body 10.

The second combustion chamber body 10 comprises a furnace body 11, a smoke inlet 12 arranged at the upper end of the furnace body 11, at least one secondary air pipe 13 arranged on the wall of the furnace body 11, and a smoke outlet 14 arranged at the lower end of the furnace body 11.

The furnace body 11 may be a cylindrical or other polygonal cylindrical structure as a whole. The furnace body 11 can be positioned and supported on the ground through the bracket 110; the support 110 may be a frame structure, or may be composed of a plurality of support legs as shown in fig. 1. The structure layer of the furnace wall of the furnace body 11 sequentially comprises a steel layer, a heat insulation material layer and a refractory material layer from outside to inside.

The smoke inlet 12 is preferably arranged at the top of the furnace body 11 and is used for receiving smoke needing reburning treatment.

The secondary air pipe 13 is used for receiving combustion-supporting air and can be one or more than one. For the arrangement of the plurality of secondary air pipes 13, the plurality of secondary air pipes 13 can form at least one air inlet pipe layer on the furnace wall; the plurality of secondary air pipes 13 on the same air inlet layer are uniformly distributed at intervals along the circumferential direction of the furnace body 11 and are at the same height.

In order to make the introduced combustion-supporting air be fully and uniformly mixed with the flue gas of the furnace body 11, the secondary air pipe 13 is obliquely arranged, so that the included angle between the secondary air pipe and the horizontal direction is +/-30 degrees (the angle of upward or downward inclination). In addition, the secondary air pipe 13 can be inclined relative to the radial direction of the furnace body 11, so that the incident angle of the secondary air pipe 13 can be eccentric by 0-20 degrees relative to the center of the furnace body 11.

The smoke outlet 14 is arranged at the lower end of the furnace body 11 and used for outputting smoke after combustion treatment.

The combustion nozzle 20 is provided on the smoke inlet 12. Referring to fig. 2 to 4, the burner 20 includes an air inlet chamber 21 disposed at the periphery of the smoke inlet 12, at least one air inlet pipe 22 disposed on the air inlet chamber 21, and a plurality of swirl plates 23.

The inlet chamber 21 is closed at the top and has an outlet at the bottom, and the outlet is communicated with the inside of the furnace body 11. An intake pipe 22 is provided on an outer wall of the intake chamber 21 and communicates with the intake chamber 21 for introducing air into the intake chamber 21.

The outer wall of the air inlet chamber 21 is built by refractory special-shaped bricks.

A plurality of swirl plates 23 are arranged at the outlet at intervals along the circumferential direction of the air inlet chamber 21, and change the airflow from the axial flow into a swirl flow to enter the interior of the furnace body 11. The air that gets into 11 insides of furnace body mixes with the flue gas that gets into at 11 internal tops of furnace to the air of whirl mode has strengthened the mixing degree of air and flue gas, promotes combustion effect, is favorable to combustible component abundant burning in the flue gas, reduces the content of harmful ingredients such as dioxin, CO in the flue gas.

A plurality of swirl plates 23 are spaced apart at the outlet of the inlet chamber 21 and are each inclined with respect to the radial direction of the inlet chamber 22. Alternatively, the mounting angle of the swirl plates 23 is inclined by 10 to 45 to the axial direction of the inlet chamber 22.

The spinning disk 23 is made of high temperature resistant ceramic or high temperature resistant alloy.

Further, the second combustion chamber body 10 further comprises at least one auxiliary burner 15 arranged on the wall of the furnace body 11 and communicated with the inside of the furnace body 11, and an ash exhauster 16 arranged below the furnace body 11.

The auxiliary burner 15 is used as an auxiliary heat source and is started when the temperature in the furnace body 11 does not reach the required temperature, so as to raise the temperature in the furnace body 11. The auxiliary burner 15 can be inserted on the wall of the furnace body 11 in an inclined manner relative to the horizontal plane, and the inclination of the auxiliary burner 15 can be inclined upwards or downwards.

The ash discharger 16 is disposed below the furnace body 11 and is used for receiving the fly ash formed after combustion in the furnace body 11. Correspondingly, the bottom of the furnace body 11 is provided with an ash discharge port 17 which is communicated with an ash discharge machine 16.

The ash discharger 16 may be a collecting box or a collecting pipe.

The utility model discloses a take two combustion chambers during operation of burning shower nozzle, the gasifier perhaps burns the combustible tail gas that the burning furnace produced and in the furnace body 11 that the mouth 12 got into two combustion chambers body 10 through advancing the cigarette mouth, the air gets into the air intake cavity 21 of burning shower nozzle 20 through intake pipe 22 in, forms strong torrent with the combustible tail gas mixture at furnace body 11 internal top via whirl 23 evenly distributed, takes place abundant combustion reaction, later cooperates the secondary to give wind and carries out the postcombustion. When the temperature in the furnace body 11 is lower than 1100 ℃, the auxiliary burner 15 is started to heat up, the retention time of the mixed gas in the secondary combustion chamber is ensured to be more than 2 seconds, and the retained fly ash is discharged through an ash discharge machine 16 at the bottom of the secondary combustion chamber body 10.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A secondary combustion chamber with a combustion nozzle is characterized by comprising a secondary combustion chamber body and the combustion nozzle arranged on the secondary combustion chamber body; the secondary combustion chamber body comprises a furnace body, a smoke inlet arranged at the upper end of the furnace body, at least one secondary air pipe arranged on the furnace wall of the furnace body, and a smoke outlet arranged at the lower end of the furnace body;

2. The secondary combustion chamber with burner cap according to claim 1, wherein the mounting angle of the swirl plate is inclined by 10 ° to 45 ° with respect to the axial direction of the air intake chamber.

3. The secondary combustion chamber with the burner cap as set forth in claim 1, wherein the incident angle of the secondary air pipe is eccentric 0-20 ° with respect to the center of the furnace body.

4. The secondary combustion chamber with the combustion nozzle as set forth in claim 1, wherein the angle between the secondary air duct and the horizontal direction is ± 30 °.

5. The secondary combustion chamber with the combustion nozzle as set forth in claim 1, wherein the swirl plate is a high temperature resistant ceramic plate or a high temperature resistant alloy plate.

6. The secondary combustion chamber with a burner cap according to claim 1, characterized in that the outer wall of the intake chamber is constructed by refractory shaped bricks.

7. The secondary combustion chamber with the combustion nozzle as set forth in claim 1, wherein the secondary combustion chamber body includes a plurality of secondary air ducts; the plurality of secondary air pipes form at least one air inlet pipe layer;

8. The secondary combustion chamber with the combustion nozzle according to any one of claims 1 to 7, characterized in that the secondary combustion chamber body further comprises at least one auxiliary burner provided on the wall of the furnace body and communicating with the interior of the furnace body.

9. The secondary combustion chamber with the combustion nozzle as set forth in claim 8, wherein the auxiliary burner is inserted obliquely to the horizontal plane on the wall of the furnace body.

10. The secondary combustion chamber with the combustion nozzle as claimed in claim 8, wherein the secondary combustion chamber body further comprises an ash discharge machine arranged below the furnace body, and an ash discharge port communicated with the ash discharge machine is arranged at the bottom of the furnace body.