CN216203297U

CN216203297U - Anti-coking device for low-nitrogen combustion boiler

Info

Publication number: CN216203297U
Application number: CN202122688233.3U
Authority: CN
Inventors: 杨明炎; 马飞虎; 马中德
Original assignee: Vinda Personal Care China Co Ltd
Current assignee: Vinda Personal Care China Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-04-05
Anticipated expiration: 2031-11-04

Abstract

The utility model discloses an anti-coking device for a low-nitrogen combustion boiler, which comprises a boiler main body; through jet head and horizontal jet head about setting up, the upper and lower jet head is located between afterburner and the main burner of burning then, the higher sharp wind of jet head input air speed makes progress down, and then the inner wall that is on a parallel with boiler body blows to afterburner and main burner of burning then under the effect of jet head about, and then prevent that the coal ash from accumulating and the coking between afterburner and main burner of burning then, to the slower slow wind of horizontal jet head input air speed, and then make the inside slow wind of horizontal jet head blow to boiler body's inside, and then prevent that the coal ash accumulation from the outside at horizontal jet head, thereby prevent that the coal ash accumulation from causing the coking between over-fired wind shower nozzle and afterburner, and then reached the effect that prevents the coking, can prevent to lead to spout direction deflection because the inside coking of boiler body.

Description

Anti-coking device for low-nitrogen combustion boiler

Technical Field

The utility model relates to the technical field of low-nitrogen combustion, in particular to an anti-coking device for a low-nitrogen combustion boiler.

Background

Low nitrogen combustion is the formation of nitrogen oxides as part of the combustion reaction: the nitrogen oxides formed by combustion being mainly NO and NO₂Collectively referred to as NO_x(ii) a Influencing fuel type NO_xThe generation factors are more and are related to temperature, oxygen content, reaction time and physical and chemical characteristics of the coal powder; the denitrification in the furnace adopts various combustion technical means to control NO in the combustion process_xFormation of (2), also known as Low NO_xCombustion technology.

Household paper need use the boiler to provide certain energy in process of production, at present, the low nitrogen burning of boiler air classification is reformed transform the back, the regional oxygen content of its main burner can sharply reduce and cause the boiler ash melting point step-down, be nitrogen oxide reducing zone between burn-out air and main burner, oxygen concentration is very low produces the coking problem in the weak wind district in four corners easily, coke breeze can slowly pile up between burn-out air and main burner when the coking takes place in the furnace corner, it causes spout jet direction deflection to block up the spout gradually, finally cause the large tracts of land coking of boiler, cause the overtemperature explosion tube to be forced to shut down the stove even, consequently, provide a low nitrogen combustion boiler and use anti-coking device.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that coke blocks are slowly accumulated between over-fired air and a main burner when the corners of a hearth are coked in the prior art, the jet direction of a nozzle is deflected due to the gradual blockage of the nozzle, and finally the large-area coking of a boiler is finally caused, and even the overtemperature pipe explosion is forced to stop the boiler.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low nitrogen burning is anti-coking device for boiler, includes boiler main body, the upper end fixedly connected with outlet duct in the boiler main body outside, outlet duct fixedly connected with lower jet head is kept away from in the boiler main body outside, the boiler main body outside is located down under the jet head fixedly connected with burn out air shower nozzle, after burner and main burning ware in proper order, the boiler main body outside is located after burner and main burning ware between fixedly connected with upper and lower jet head, the boiler main body outside is located the horizontal jet head of fixedly connected with between after burner shower nozzle and the after burner.

Preferably, an air inlet pipe is fixedly connected to the outer side of the main burner.

Preferably, a pulverized coal pipe is fixedly connected to the outer side of the secondary combustor.

Preferably, an over-fire air pipe is fixedly connected to the outer side of the over-fire air nozzle.

Preferably, the outer sides of the lower air nozzle and the upper air nozzle and the outer sides of the lower air nozzle and the upper air nozzle are fixedly connected with a sharp air pipe, and the air flow rate conveyed inside the sharp air pipe is 30-40 m/s.

Preferably, the outer side of the horizontal air nozzle is fixedly connected with an air buffering pipe, and the air flow rate conveyed by the air buffering pipe is 9-13 m/s.

Preferably, the bottom end of the lower jet head is provided with a downward vent, and the downward vent is parallel to the inner side of the boiler main body.

Preferably, the upper side and the lower side of the upper and the lower air nozzles are both provided with ventilation openings, and the upper and the lower ventilation openings are parallel to the inner side of the boiler main body.

Preferably, the horizontal air nozzle is kept away from one side of slow tuber pipe and has evenly seted up the ventilation hole, the ventilation hole is with the inboard parallel and level of boiler main part.

Preferably, the vent on lower jet head and the upper and lower jet heads all mutually supports with the inboard of boiler body, the vent is close to one side of boiler body and the inboard of boiler body parallel and level each other.

Compared with the prior art, the utility model provides an anti-coking device for a low-nitrogen combustion boiler, which has the following beneficial effects:

1. according to the utility model, the upper and lower air nozzles and the horizontal air nozzle are arranged, the upper and lower air nozzles are positioned between the secondary combustor and the primary combustor, and high-speed fast wind is input to the upper and lower air nozzles and then blown to the secondary combustor and the primary combustor in parallel to the inner wall of the boiler main body under the action of the upper and lower air nozzles, so that coal ash is prevented from accumulating between the secondary combustor and the primary combustor and coking is prevented;

2. according to the utility model, the lower air nozzle is arranged at the top end of the upper part of the over-fire air nozzle positioned in the boiler main body, and the sharp air with higher air speed is input into the lower air nozzle, so that the sharp air is blown to the over-fire air nozzle in parallel to the inner wall of the boiler main body under the action of the vent at the bottom end of the lower air nozzle, and coking caused by accumulation of coal ash on the inner wall of the boiler main body positioned above the over-fire air nozzle is further prevented.

The device has the advantages that the structure is scientific and reasonable, the use is safe and convenient, and great help is provided for people.

Drawings

FIG. 1 is a schematic view of an assembly structure of an anti-coking device for a low-nitrogen combustion boiler, which is provided by the utility model;

FIG. 2 is a schematic diagram of an explosion structure of an anti-coking device for a low-nitrogen combustion boiler, which is provided by the utility model;

FIG. 3 is a schematic structural diagram of a main view of an anti-coking device for a low-nitrogen combustion boiler according to the present invention;

fig. 4 is a schematic sectional view at a-a in fig. 3.

Description of the reference numerals

The boiler comprises a boiler body 1, an air outlet pipe 2, a lower air nozzle 3, an over-fire air nozzle 4, a secondary combustor 5, a main burner 6, an upper air nozzle 7, a lower air nozzle 7, a horizontal air nozzle 8, an air inlet pipe 9, a pulverized coal pipe 10, an over-fire air pipe 11, an acute air pipe 12 and a slow air pipe 13.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides a technical solution: an anti-coking device for a low-nitrogen combustion boiler comprises a boiler body 1, an air outlet pipe 2 is fixedly connected to the upper end of the outer side of the boiler body 1, a lower air nozzle 3 is fixedly connected to the outer side of the boiler body 1 far away from the air outlet pipe 2, an over-fire air nozzle 4, a secondary combustor 5 and a main burner 6 are fixedly connected to the outer side of the boiler body 1 under the lower air nozzle 3 in sequence, an upper air nozzle 7 and a lower air nozzle 7 are fixedly connected to the outer side of the boiler body 1 between the over-fire air nozzle 4 and the secondary combustor 5, a horizontal air nozzle 8 is fixedly connected to the outer side of the boiler body 1 between the over-fire air nozzle 4 and the secondary combustor 5, the upper air nozzle 7 and the lower air nozzle 7 are positioned between the secondary combustor 5 and the main burner 6 by arranging the upper air nozzle 7 and the horizontal air nozzle 8, a sharp air with higher air speed is input to the upper air nozzle 7 and the lower air nozzle 7, and then is blown to the secondary combustor 5 and the main burner 6 in parallel to the inner wall of the boiler body 1 under the action of the upper air nozzle 7, and then prevent that the coal ash from accumulating and the coking between afterburner 5 and main burner 6, to the slow wind that horizontal jet 8 input wind speed is slow, and then make the inside slow wind of horizontal jet 8 blow to boiler body 1's inside, and then prevent that the coal ash from accumulating in horizontal jet 8's the outside, thereby prevent that the coal ash accumulation from causing the coking between after-fire air shower nozzle 4 and afterburner 5, and then reached the effect that prevents the coking, can prevent to lead to spout efflux direction to deflect because the inside coking of boiler body 1.

In the present invention, preferably, an air inlet pipe 9 is fixedly connected to an outer side of the main burner 6, and air is introduced into the main burner 6 through the air inlet pipe 9, so that the main burner 6 burns pulverized coal.

In the present invention, it is preferable that a pulverized coal pipe 10 is fixedly connected to the outer side of the secondary combustor 5, and the treated ultrafine pulverized coal is introduced into the secondary combustor 5 through the pulverized coal pipe 10 to be combusted again.

In the present invention, preferably, an over-fire air pipe 11 is fixedly connected to the outer side of the over-fire air nozzle 4, and the over-fire air is input to the over-fire air nozzle 4 through the over-fire air pipe 11.

In the present invention, preferably, the outer sides of the lower and

upper nozzles

3 and 7 are fixedly connected with the fast air pipes 12, the air flow rate conveyed inside the fast air pipes 12 is 30m/s to 40m/s, and fast air with higher air speed is input to the lower and

upper nozzles

3 and 7 through the fast air pipes 12.

In the present invention, preferably, a slow air duct 13 is fixedly connected to the outer side of the horizontal air nozzle 8, the air flow rate conveyed inside the slow air duct 13 is 9m/s to 13m/s, and slow air with a relatively slow air speed is input to the horizontal air nozzle 8 through the slow air duct 13.

In the utility model, preferably, the bottom end of the lower jet head 3 is provided with a downward vent which is parallel to the inner side of the boiler body 1, and the blast is blown to the over-fire air nozzle 4 parallel to the inner wall of the boiler body 1 under the action of the vent at the bottom end of the lower jet head 3, thereby preventing the coking caused by the accumulation of coal ash on the inner wall of the boiler body 1 above the over-fire air nozzle 4.

In the present invention, it is preferable that the upper and lower sides of the upper and lower nozzles 7 are provided with ventilation openings, the upper and lower ventilation openings are parallel to the inner side of the boiler body 1, and the coal ash is blown to the secondary combustor 5 and the primary combustor 6 parallel to the inner wall of the boiler body 1 by the ventilation openings of the upper and lower sides of the upper and lower nozzles 7, thereby preventing the coal ash from accumulating between the secondary combustor 5 and the primary combustor 6 and coking.

In the utility model, preferably, vent holes are uniformly formed in one side of the horizontal air nozzle 8, which is far away from the air slow-release pipe 13, and the vent holes are flush with the inner side of the boiler main body 1, so that slow air in the horizontal air nozzle 8 is blown to the inner side of the boiler main body 1 under the action of the horizontal vent holes, and then coal ash is prevented from accumulating on the outer side of the horizontal air nozzle 8, thereby preventing coal ash from accumulating between the over-fire air nozzle 4 and the secondary combustor 5 to cause coking.

In the present invention, it is preferable that the ventilation openings of the lower and

upper nozzles

3 and 7 are fitted to the inside of the boiler body 1, and the side of the ventilation opening close to the boiler body 1 is flush with the inside of the boiler body 1.

The working principle and the using process of the utility model are as follows: when in use, air is input into the main burner 6 through the air inlet pipe 9, the main burner 6 burns pulverized coal, the processed superfine pulverized coal is input into the secondary burner 5 through the pulverized coal pipe 10 to be burnt again, the over-fire air nozzle 4 is arranged above the secondary burner 5, over-fire air is input into the over-fire air nozzle 4 through the over-fire air pipe 11, an upper air nozzle 7 and a lower air nozzle 7 are arranged between the main burner 6 and the secondary burner 5, the outer sides of the upper air nozzle 7 and the lower air nozzle 7 are fixedly connected with an emergency air pipe 12, the emergency air with higher air speed is input into the upper air nozzle 7 and the lower air nozzle 7 through the emergency air pipe 12, then the air is blown to the secondary burner 5 and the main burner 6 in parallel to the inner wall of the boiler main body 1 under the action of the ventilation openings at the upper side and the lower side of the upper air nozzle 7, thereby preventing coal ash from accumulating and coking between the secondary burner 5 and the main burner 6, and the lower air nozzle 3 is arranged at the top end, which is positioned inside the boiler main body 1, above the over-fire air nozzle 4, and the outside of the lower jet head 3 is fixedly connected with a fast air pipe 12, the fast air with higher wind speed is input to the lower jet head 3 through the fast air pipe 12, the fast air is parallel to the inner wall of the boiler body 1 and blows to the over-fire air nozzle 4 under the action of a vent at the bottom end of the lower jet head 3, thereby preventing the coking caused by the accumulation of coal ash on the inner wall of the boiler body 1 above the over-fire air nozzle 4, a horizontal jet head 8 is arranged between the over-fire air nozzle 4 and the secondary burner 5, the outside of the horizontal jet head 8 is fixedly connected with a slow air pipe 13, slow air with lower wind speed is input to the horizontal jet head 8 through the slow air pipe 13, further, the slow air in the horizontal jet head 8 is blown to the inside of the boiler body 1 under the action of a horizontal vent hole, thereby preventing the coal ash from accumulating on the outside of the horizontal jet head 8, thereby preventing the coking caused by the accumulation of coal ash between the over-fire air nozzle 4 and the secondary burner 5, thereby achieving the effect of preventing coking and preventing the deflection of the jet direction of the nozzle caused by the coking in the boiler body 1.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications can be made to the technical solution of the utility model, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the utility model, and all fall within the scope of the utility model.

Claims

1. The utility model provides a low nitrogen is anti-coking device for combustion boiler, includes boiler main part (1), its characterized in that: upper end fixedly connected with outlet duct (2) in boiler main part (1) outside, outlet duct (2) fixedly connected with lower jet (3) is kept away from in boiler main part (1) outside, fixedly connected with burns out wind shower nozzle (4), after burner (5) and main burning ware (6) in proper order under boiler main part (1) outside is located lower jet (3), jet (7) about being located fixedly connected with between after burner (5) and main burning ware (6) in the boiler main part (1) outside, fixed connection has horizontal jet (8) between boiler main part (1) outside is located and burns out wind shower nozzle (4) and after burner (5).

2. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that an air inlet pipe (9) is fixedly connected to the outer side of the main burner (6).

3. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that a pulverized coal pipe (10) is fixedly connected to the outer side of the secondary combustor (5).

4. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that an over-fire air pipe (11) is fixedly connected to the outer side of the over-fire air nozzle (4).

5. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that the outer sides of the lower jet head (3) and the upper and lower jet heads (7) are both fixedly connected with a fast air duct (12), and the air flow rate conveyed inside the fast air duct (12) is 30m/s-40 m/s.

6. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that a slow-release duct (13) is fixedly connected to the outer side of the horizontal jet head (8), and the air flow rate conveyed inside the slow-release duct (13) is 9m/s to 13 m/s.

7. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that the bottom end of the lower jet head (3) is provided with a downward vent which is parallel to the inner side of the boiler body (1).

8. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that the upper and lower sides of the upper and lower jet heads (7) are provided with ventilation openings, and the upper and lower ventilation openings are parallel to the inner side of the boiler body (1).

9. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that the horizontal air nozzle (8) is evenly provided with vent holes at one side far away from the slow-air pipe (13), and the vent holes are flush with the inner side of the boiler main body (1).

10. The anti-coking device for the low-nitrogen combustion boiler according to claim 1, characterized in that the ventilation openings of the lower and upper nozzles (3, 7) are matched with the inner side of the boiler body (1), and the side of the ventilation opening close to the boiler body (1) is flush with the inner side of the boiler body (1).