CN211372399U

CN211372399U - Premixing low-nitrogen combustor

Info

Publication number: CN211372399U
Application number: CN201922020431.5U
Authority: CN
Inventors: 徐子逸; 陈继煌; 彭立虎
Original assignee: Zhejiang Tuff Boiler Co Ltd
Current assignee: Zhejiang Tefu Development Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-08-28
Anticipated expiration: 2029-11-20

Abstract

The utility model provides a mix formula low NOx burner in advance belongs to mechanical technical field. It has solved prior art and has had the poor problem of stability. This mix formula low NOx burner in advance is including being pipy outer tube and inner tube, inner tube one end is for being used for the interface section that is connected with the gas source, and the inner tube other end is for being used for spraying the nozzle of flame, the inner tube middle part has and is annular convex connecting portion, and above-mentioned outer tube inner has the protruding edge that keeps off to inboard annular, and above-mentioned outer pipe box is on the inner tube and keep off the edge and lean on in connecting portion department, the nozzle is located the outer tube inboard, the outer tube lateral part has rather than the communicating air intake of inner chamber. The premixing type low-nitrogen combustor is high in stability.

Description

Premixing low-nitrogen combustor

Technical Field

The utility model belongs to the technical field of machinery, a mix formula low NOx burner in advance is related to.

Background

The burner is an important component part in the boiler, and the existing burner generally directly carries out combustion ignition treatment on a gas medium.

In order to ensure the gas medium is fully combusted, it is necessary to ensure that the combustor has enough air.

In order to solve the problem in the existing boiler, the number of nozzles at a combustor is usually set to be more, and the large-area and large-number nozzles are adopted to ensure that the combustion of a gas medium is sufficient.

It can be seen that this structure is too complex and costly, and the nozzle is easily damaged by touch during actual use, and its stability is poor.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a high and compact structure's formula low NOx burner mixes in advance.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a mix formula low NOx burner in advance which characterized in that, is including being pipy outer tube and inner tube, inner tube one end is for being used for the interface section that is connected with the gas source, and the inner tube other end is for being used for spraying the nozzle of flame, the inner tube middle part has and is annular convex connecting portion, and above-mentioned outer tube inner has the inside annular convex fender edge, and above-mentioned outer pipe box is on the inner tube and keep off the edge and lean on in connecting portion department, the nozzle is located the outer tube inboard, the outer tube lateral part has rather than the communicating air intake of inner chamber.

The premixing type low-nitrogen combustor creatively forms a channel for conveying air between the inner pipe and the outer pipe. The inner pipe is used for conveying a gas medium, and in the combustion process of the gas medium at the nozzle, the gas medium can be fully combusted by the air input by the outer pipe.

Of course, the interface section is used for being connected with a gas source, and the air inlet is connected with the air blower through a connecting pipe.

In the premixed low-nitrogen burner, the connecting part is in threaded connection with the outer pipe.

Such a structure enables the outer pipe and the inner pipe to be stably coupled together.

In the premixed low-nitrogen burner, the width of the connecting part is 2/3-3/4 of the diameter of the inner pipe.

Such structure can guarantee that the inner tube can not become flexible with outer tube connection back between the two, guarantees connection stability.

In the premixed low-nitrogen burner, the end of the inner tube has a plurality of through injection holes, and the injection holes form the nozzle.

In the premixing type low-nitrogen burner, the end part of the inner pipe is fixedly connected with an electronic igniter, and the plurality of spray holes are close to the electronic igniter.

The electronic igniter can enable the gas medium at the nozzle to be stably combusted after the action.

In the premixed low-nitrogen burner, the air inlet is located in the middle of the outer pipe.

In the premixing type low-nitrogen combustor, the outer end of the outer pipe is fixedly connected with a flow guide piece, and air entering from the air inlet can enter the nozzle under the action of the flow guide piece.

In the premixed low-nitrogen burner, the flow guide member is annular, and the flow guide member is screwed at the outer end of the outer tube.

In the premixed low-nitrogen burner, the guide member has an inclined guide surface on a side close to the nozzle.

The air input from the blower can stably enter the nozzle through the gap between the outer pipe and the inner pipe through the flow guide piece, and the gas medium at the nozzle can be fully combusted.

Compared with the prior art, the premixing type low-nitrogen combustor can enable air to stably enter the nozzle, so that a gas medium can be fully combusted, and the stability is high.

Meanwhile, the inner pipe is positioned in the outer pipe, and the flow guide piece is connected to the outer end of the outer pipe, so that the whole combustor is simple and compact in structure and has high practical value.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the premix low-nitrogen burner.

In the figure, 1, an outer tube; 1a, blocking edges; 1b, an air inlet; 2. an inner tube; 2a, an interface section; 2b, a nozzle; 2c, a connecting part; 3. an electronic lighter; 4. a flow guide member; 4a and a flow guide surface.

Detailed Description

As shown in fig. 1, the premix low-nitrogen burner comprises a tubular outer tube 1 and an inner tube 2, wherein one end of the inner tube 2 is a connector section 2a used for being connected with a gas source, the other end of the inner tube 2 is a nozzle 2b used for spraying flame, a connecting part 2c protruding in an annular shape is arranged in the middle of the inner tube 2, a blocking edge 1a protruding in an annular shape towards the inner side is arranged at the inner end of the outer tube 1, the outer tube 1 is sleeved on the inner tube 2, the blocking edge 1a abuts against the connecting part 2c, the nozzle 2b is arranged on the inner side of the outer tube 1, and an air inlet 1b communicated with the inner cavity of the outer tube.

The connecting portion 2c is screwed with the outer tube 1.

The width dimension of the connecting part 2c is 2/3-3/4 of the diameter dimension of the inner pipe 2.

The end of the inner tube 2 is provided with a plurality of penetrating spray holes which form the nozzle 2 b.

The end part of the inner tube 2 is fixedly connected with an electronic lighter 3, and the plurality of spray holes are close to the electronic lighter 3.

The air inlet 1b is positioned in the middle of the outer pipe 1.

The outer end of the outer pipe 1 is fixedly connected with a flow guide part 4, and air entering from the air inlet 1b can enter the nozzle 2b under the action of the flow guide part 4.

The flow guide piece 4 is in a ring shape, and the flow guide piece 4 is in threaded connection with the outer end of the outer pipe 1.

The guide element 4 has an inclined guide surface 4a on the side close to the nozzle 2 b.

Claims

1. The utility model provides a mix formula low NOx burner in advance which characterized in that, is including being pipy outer tube and inner tube, inner tube one end is for being used for the interface section that is connected with the gas source, and the inner tube other end is for being used for spraying the nozzle of flame, the inner tube middle part has and is annular convex connecting portion, and above-mentioned outer tube inner has the inside annular convex fender edge, and above-mentioned outer pipe box is on the inner tube and keep off the edge and lean on in connecting portion department, the nozzle is located the outer tube inboard, the outer tube lateral part has rather than the communicating air intake of inner chamber.

2. The premixed low-nitrogen burner according to claim 1, wherein the connection portion is screwed with the outer tube.

3. The premixed low-nitrogen burner according to claim 2, wherein the width dimension of the connecting portion is 2/3-3/4 of the inner tube diameter dimension.

4. The premixed low-nitrogen burner according to claim 3, wherein the inner tube end has a plurality of injection holes therethrough, the plurality of injection holes forming the nozzle.

5. The pre-mixing type low-nitrogen burner according to claim 4, wherein an electronic igniter is fixed at the end of the inner tube, and the plurality of injection holes are close to the electronic igniter.

6. The premixed low-nitrogen burner according to claim 5, wherein the air inlet is located at the middle of the outer tube.

7. The premix low-nitrogen burner as in claim 6, wherein a flow guide member is fixedly connected to an outer end of the outer tube, and air entering from the air inlet can enter the nozzle under the action of the flow guide member.

8. The premix low-nitrogen burner as in claim 7, wherein the flow guide member is annular and is screwed to the outer end of the outer tube.

9. The premixed low-nitrogen burner according to claim 8, wherein the side of the flow guide member adjacent to the nozzle has an inclined flow guide surface.