CN216159040U

CN216159040U - Novel low-nitrogen combustor

Info

Publication number: CN216159040U
Application number: CN202122241512.5U
Authority: CN
Inventors: 邱丽娟; 袁梦霞; 张静静; 张博
Original assignee: Atea (shanghai) Environmental Ltd
Current assignee: Atea (shanghai) Environmental Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-04-01
Anticipated expiration: 2031-09-16

Abstract

The application discloses novel low nitrogen combustor, including combustor body, secondary bellows, bushing type gas spray gun and an at least waste gas spray gun. The burner body is provided with an air inlet chamber communicated with a hearth of the combustion furnace and a primary air port communicated with the air inlet chamber. The secondary air box is arranged around the burner body. The secondary air box is provided with a secondary air chamber, a secondary air port communicated with the secondary air chamber and an air channel communicated with the secondary air chamber and the hearth, and a secondary air valve is arranged at the position of the secondary air port. The gas spray gun penetrates through the burner body and extends into the hearth, and gas and steam are conveyed into the hearth. The waste gas spray gun is arranged in the secondary air box, and a waste gas conveying pipe is arranged in the waste gas spray gun to convey waste gas to the hearth. The combustor can reasonably adjust the temperature of gas flame by providing steam in the hearth in the combustion process, thereby effectively treating waste gas.

Description

Novel low-nitrogen combustor

Technical Field

The utility model relates to the technical field of combustor equipment, in particular to a novel low-nitrogen combustor.

Background

A burner is a general term for a device that performs mixed combustion by ejecting fuel and air into a furnace of a combustion furnace in a predetermined manner.

At present, the burner generally burns combustible components in a hearth by means of graded air supply and graded fuel supply, wherein the graded air supply is as follows: the combustion-supporting air is divided into primary combustion-supporting air and secondary combustion-supporting air, wherein the primary combustion-supporting air is subjected to anoxic combustion in a hearth, so that a large amount of carbon monoxide is generated during combustion of waste gas, nitrogen oxides formed by nitrogen elements are inhibited, and most of nitrogen is converted into nitrogen; wherein, the secondary combustion-supporting air carries out sufficient aerobic combustion in the hearth, and ensures that the generated organic matters such as carbon monoxide and the like are fully burnt. The staged fuel supply is as follows: set up a plurality of fuel spray guns, with the fuel share, avoid forming powerful flame to reduce the temperature in flame zone.

However, the discharge of the waste gas is generally irregular, and meanwhile, the components of the waste gas are more and more complex and diversified, and the flow rate, the components and the like of the waste gas have large fluctuation, so that the existing burner is difficult to effectively treat the waste gas, namely the treated waste gas is difficult to reach the standard.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a novel low-nitrogen combustor, which provides steam into a hearth through a first steam channel during combustion, reasonably adjusts the temperature of gas flame according to the flow of fuel gas in a first inner pipe, thereby effectively treating the incineration of waste gas and being suitable for the low-nitrogen combustion emission of the waste gas with different waste gas components and different waste gas flows.

The utility model mainly aims to provide a novel low-nitrogen combustor, which can effectively and conveniently control the flow of primary air in a primary air port, the flow of secondary air in a secondary air port and the flow of steam in a first steam channel respectively by arranging a primary air valve, a secondary air valve and a first steam control valve, thereby realizing reasonable delivery of primary combustion-supporting air respectively and enabling fuel to be subjected to effective anoxic combustion; the secondary air is reasonably conveyed, so that the flue gas is effectively and sufficiently combusted in the hearth in an aerobic manner; the reasonable conveying of the steam is realized, and the temperature of the gas flame is reasonably regulated, so that the device is suitable for effectively treating waste gas with different waste gas components and different waste gas flow rates.

Another objective of the present invention is to provide a novel low-nitrogen burner, wherein the air channels are symmetrically distributed in a frustum shape along the circumferential direction of the secondary air box, so that the secondary air is circularly conveyed around the flame in a vortex manner, thereby promoting the smoke turbulence in the furnace, and further improving the control accuracy and control effect on the flame temperature.

Another object of the present invention is to provide a novel low-nitrogen burner, wherein the air ducts are distributed at intervals along the same inclined direction along the circumferential direction of the secondary air box, so that the air ducts can form a swirling effect in the furnace, internal flue gas circulation transversely surrounding the flame is formed in the furnace, and the control precision and the control effect on the flame temperature are further improved.

To achieve at least one of the above objects, the present invention provides a novel low-nitrogen burner for supplying gas and air to a combustion furnace, wherein the novel low-nitrogen burner comprises:

the burner body is provided with an air inlet chamber communicated with a hearth of the combustion furnace, a primary air port communicated with the air inlet chamber and a primary air valve at the primary air port;

the secondary air box is arranged around the burner body, is provided with a secondary air chamber, is provided with a secondary air port communicated with the secondary air chamber and an air channel communicated with the secondary air chamber and the hearth, and is provided with a secondary air valve at the position of the secondary air port;

the gas spray gun comprises a first inner pipe and a first outer pipe, wherein a gas outlet is formed in the end part of the tail end of the first inner pipe so as to convey gas into the hearth, a first steam channel is formed between the first outer pipe and the first inner pipe so as to provide steam for the hearth, and a first steam control valve is arranged at a channel inlet of the first steam channel; and

at least one waste gas spray gun, wherein the waste gas spray gun is set up in the secondary bellows, just be provided with the exhaust duct in the waste gas spray gun, in order to furnace carries waste gas.

According to an embodiment of the present invention, the burner body is provided with a swirl plate and an adjustment guide in the air inlet chamber to promote a swirl of the primary air from the primary air inlet, wherein the swirl plate is adjustably connected to the adjustment guide.

According to an embodiment of the present invention, the exhaust gas spray gun is a sleeve type spray gun, and the exhaust gas spray gun further includes a second steam delivery pipe sleeved on the exhaust gas delivery pipe to deliver steam to the furnace.

According to an embodiment of the present invention, a second steam control valve is disposed at a pipeline inlet of the second steam delivery pipe, so as to automatically adjust a delivery steam flow of the second steam delivery pipe according to a calorific value of the exhaust gas delivered by the exhaust gas delivery pipe.

According to an embodiment of the present invention, the first outer pipe is provided with an air inlet communicated with the first steam channel, and an end portion of the first outer pipe close to the furnace chamber is matched with the first inner pipe to form an air outlet of the first steam channel.

According to an embodiment of the present invention, the exhaust gas ejection guns have a plurality, and the plurality of exhaust gas ejection guns are uniformly arranged in the secondary air box along the circumferential direction of the secondary air box.

According to an embodiment of the present invention, the air duct has a plurality of air ducts, and the plurality of air ducts are distributed along the circumferential direction of the secondary air box in a predetermined regular manner.

According to an embodiment of the utility model, the air channels are symmetrically distributed in a frustum shape along the annular circumference of the secondary air box, and one end of each air channel, which is close to the hearth, is close to the outer side of the secondary air box.

According to an embodiment of the utility model, the air channels are distributed at intervals along the annular circumference of the secondary air box along the same inclination direction, and one end of each air channel, which is close to the hearth, is close to the outer side of the secondary air box.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.

Drawings

Fig. 1 is a schematic partial sectional view of a novel low-nitrogen burner according to a preferred embodiment of the present application.

Fig. 2 is a schematic partial sectional view of a novel low-nitrogen burner according to another preferred embodiment of the present application.

Detailed Description

The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

It will be understood by those skilled in the art that in the disclosure of the specification, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience in describing the utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms are not to be construed as limiting the utility model.

Referring to fig. 1 of the drawings, a novel low-nitrogen burner according to a preferred embodiment of the present invention is provided for supplying gas and air to a combustion furnace, wherein the novel low-nitrogen burner includes a burner body 10, a secondary air box 20, a sleeve-type gas injection lance 30, and at least one waste gas injection lance 40.

The burner body 10 has an air inlet chamber 11. The burner body 10 is communicated with the hearth 50 of the combustion furnace through the air inlet chamber 11. The burner body 10 is provided with a primary air port 12 communicated with the air inlet chamber 11 to provide primary combustion-supporting air, and a primary air valve 13 is arranged at the primary air port 12 to accurately control the flow of the primary combustion-supporting air. According to the fuel quantity in the hearth 50 of the incinerator, the primary air valve 13 is used for controlling the flow of primary combustion-supporting air in the primary air port 12, primary combustion-supporting air is reasonably provided, waste gas can be effectively subjected to anoxic combustion, and the influence of the waste gas quantity and the waste gas components of the waste gas is less limited.

The secondary windbox 20 is disposed around the burner body 10, wherein preferably, the secondary windbox 20 is disposed near the upper portion of the burner body 10, and the primary tuyere 12 is disposed near the lower portion of the burner body 10, so as to facilitate respective anoxic and aerobic combustion at different portions of the furnace 50. The secondary air box 20 is provided with a secondary air chamber, and is provided with a secondary air port 21 communicating the secondary air chamber to provide secondary combustion air, and an air duct 23 communicating the secondary air chamber and the furnace 50, so that the flue gas can be subjected to sufficient aerobic combustion in the furnace 50 by the action of the secondary combustion air.

In addition, the secondary air box 20 is further provided with a secondary air valve 22 at the secondary air opening 21. According to the factors such as the amount of waste gas and the components of the waste gas in the hearth 50 of the incinerator, the air volume of secondary combustion air in the secondary air port 21 is reasonably controlled through the secondary air valve 22 to provide reasonable amount of secondary combustion air, then the secondary combustion air is conveyed to the hearth 50 through the air duct 23 to carry out sufficient aerobic combustion, the waste gas with various waste gas amounts and waste gas components can be more sufficiently combusted, the application range is wider, the control and the operation are easy, and the cost is low.

The gas lance 30 extends through the burner body 10 into the furnace 50. The gas lance 30 is of a sleeve type design and comprises a first inner pipe 31 and a first outer pipe 32, wherein a gas outlet is arranged at the end of the tail end of the first inner pipe 31 to convey gas to the hearth 50. A first steam channel 33 is formed between the first outer pipe 32 and the first inner pipe 31 to provide steam to the furnace 50 for the purpose of reducing nitrogen oxides, wherein a first steam control valve is further disposed at a channel inlet of the first steam channel 33. According to the flow of the fuel gas, the steam flow in the first steam channel 33 is automatically adjusted at any time through the first steam control valve, so that the temperature of flame at the fuel gas outlet is properly reduced under the action of steam, the stability of the flame is ensured, the flue gas is ensured to be subjected to good anoxic combustion in the hearth 50, and the aim of reducing the content of nitrogen oxides is fulfilled.

The exhaust gas spray gun 40 is arranged in the secondary air box 20, and an exhaust gas delivery pipe 41 is arranged in the exhaust gas spray gun 40 to deliver exhaust gas to the hearth 50.

Aiming at the treatment of waste gases with different waste gas components and different waste gas flow rates, the utility model controls the air volume of primary combustion air through the primary air port 12 and the primary air valve 13, feeds fuel gas into the hearth 50 through the gas outlet of the first inner pipe 31 on the gas spray gun 30, and simultaneously conveys the waste gases to the hearth 50 through the waste gas conveying pipe 41 of the waste gas spray gun 40, thereby carrying out anoxic combustion in the hearth 50. In addition, through the first steam channel 33 between the first inner pipe 31 and the first outer pipe 32 provides steam around gas flame, comes the temperature of reasonable regulation gas flame, can effectively burn any component distribution ratio, flow size and the big or small waste gas of velocity of flow, has very extensive adaptability, and simple structure, convenient operation, and is with low costs, is suitable for using widely on a large scale.

In order to improve the conveying effect of the primary combustion-supporting air, a swirl plate and an adjusting guide rod are arranged in the air inlet chamber 11 of the burner body 10 to promote the swirl of the primary combustion-supporting air from the primary air inlet 12, wherein the swirl plate is adjustably connected to the adjusting guide rod.

Preferably, the first outer pipe 32 is provided with an air inlet 321 communicated with the first steam channel 33, and the end of the first outer pipe 32 close to the furnace 50 is matched with the first inner pipe 31 to form an air outlet 331 of the first steam channel 33.

Further preferably, the exhaust gas lance 40 is also a sleeve lance. The exhaust gas spray gun 40 further comprises a second steam delivery pipe 42 sleeved on the exhaust gas delivery pipe 41 to deliver steam to the furnace 50. In addition, the pipe inlet of the second steam conveying pipe 42 is provided with a second steam control valve so as to automatically adjust the conveying steam flow of the second steam conveying pipe 42 according to the heat value of the exhaust gas conveyed by the exhaust gas conveying pipe 41.

Further preferably, the second steam delivery pipe 42 is provided with an air inlet 421, and the second steam delivery pipe 42 is matched with the exhaust gas delivery pipe 41 in the furnace 50 to form an air outlet of the second steam delivery pipe 42.

Specifically, when the exhaust gas in the tank area is irregularly discharged, the fuel gas with the corresponding amount is introduced according to the fluctuation range of the amount of the exhaust gas discharged by the tank area, the components of the exhaust gas and the like, and then the steam flow in the second steam conveying pipe 42 is automatically adjusted at any time through the second steam control valve according to the heat value of the exhaust gas in the exhaust gas conveying pipe 41, so that the temperature of the flame at the exhaust gas outlet is properly reduced, the stability of the flame is ensured, and the aim of reducing nitrogen oxides is fulfilled. Experiments prove that the novel low-nitrogen combustor passes through the gas spray gun 30 and the automatic adjustment of the steam quantity in the first steam channel 33 at any time, and the waste gas spray gun 40 and the automatic adjustment of the steam in the second steam conveying pipe 42 at any time can effectively treat waste gas which is discharged discontinuously or is discharged unstably and irregularly by a plurality of storage tanks for storing different media, so that the flue gas generated after the waste gas is burnt reaches the standard of the content of nitrogen oxides in the waste gas, and the treated flue gas can be directly discharged at high altitude. Through increasing the mode of steam in order to reduce flame temperature not only can effectively handle waste gas, the while operation is very simple, can also effectively reduce the exhaust-gas treatment cost of enterprise.

Preferably, the exhaust gas spray guns 40 have a plurality, and the plurality of exhaust gas spray guns 40 are uniformly arranged on the secondary wind box 20 along the circumferential direction of the secondary wind box 20, so as to uniformly supply the exhaust gas to the furnace 50.

Preferably, the air duct 23 is provided with a plurality of air ducts 23, and the air ducts 23 are distributed along the circumference of the secondary air box 20 according to a predetermined rule, so that the secondary combustion air entering the furnace 50 through the air ducts 23 simultaneously can fully stir the gas (including fuel gas, combustion air and waste gas) in the furnace 50, thereby facilitating the full aerobic combustion of the waste gas in the furnace 50 and improving the incineration efficiency and the incineration effect.

More preferably, a plurality of wind channel 23 is followed the annular circumference of secondary bellows 20 becomes frustum form symmetric distribution, and is a plurality of wind channel 23 is close to furnace 50's one end is close to the outside of secondary bellows 20 to make the secondary combustion-supporting wind energy carry out the even transport of vortex formula from outside to inside form the vortex formula inner loop that encircles flame in furnace 50, it is better to the control effect of burning flame, and control accuracy is higher, and can ensure the stability of burning flame, better stability to the incineration disposal effect of waste gas.

As another preferred embodiment of this application, the difference with the above-mentioned embodiment lies in, combine fig. 2, a plurality of wind channel 24 is followed the annular circumference of secondary bellows 20 is along same incline direction interval distribution, and is a plurality of wind channel 24 is close to the one end of furnace 50 is close to the outside of secondary bellows 20 to make secondary combustion-supporting wind can follow the inner wall of furnace 50 encircles the transport, forms the whirl effect, thereby form the inside flue gas circulation that transversely encircles flame in furnace 50, reach the purpose that evenly reduces flame temperature, its control flame temperature's precision is higher, and control effect is better.

It should be noted that the terms "first and second" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be interpreted as names.

It will be appreciated by persons skilled in the art that the embodiments of the utility model shown in the foregoing description are by way of example only and are not limiting of the utility model. The objects of the utility model have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A novel low-nitrogen burner for providing gas and air to a combustion furnace, wherein said novel low-nitrogen burner comprises:

2. The new low-nitrogen burner as claimed in claim 1, wherein the burner body is provided with a swirl plate and an adjustment guide in the air inlet chamber to promote the swirl of the primary air from the primary air port, wherein the swirl plate is adjustably connected to the adjustment guide.

3. The novel low-nitrogen burner as claimed in claim 2, wherein the exhaust gas lance is a sleeve type lance, and the exhaust gas lance further comprises a second steam delivery pipe sleeved on the exhaust gas delivery pipe to deliver steam to the furnace.

4. The novel low-nitrogen burner as claimed in claim 3, wherein the pipe inlet of the second steam delivery pipe is provided with a second steam control valve to automatically adjust the delivery steam flow of the second steam delivery pipe according to the calorific value of the exhaust gas delivered by the exhaust gas delivery pipe.

5. The novel low-nitrogen burner as claimed in claim 1, wherein the first outer tube is provided with an air inlet communicated with the first steam passage, and the end of the first outer tube near the hearth is matched with the first inner tube to form an air outlet of the first steam passage.

6. The novel low-nitrogen burner as claimed in any one of claims 1 to 5, wherein the exhaust gas ejection guns have a plurality, and a plurality of the exhaust gas ejection guns are arranged uniformly in the secondary windbox in the circumferential direction of the secondary windbox.

7. The novel low-nitrogen burner as claimed in claim 6, wherein the air duct has a plurality of air ducts, and the plurality of air ducts are distributed in a predetermined regular pattern along the circumferential direction of the secondary windbox.

8. The novel low-nitrogen burner as claimed in claim 7, wherein a plurality of the air channels are symmetrically distributed in a frustum shape along the annular circumference of the secondary wind box, and one end of the air channels, which is close to the hearth, is close to the outer side of the secondary wind box.

9. The novel low-nitrogen burner as claimed in claim 7, wherein a plurality of the air channels are distributed at intervals along the annular circumference of the secondary air box along the same inclination direction, and one end of the air channels close to the hearth is close to the outer side of the secondary air box.