CN218510891U - Double-cyclone burner for cement clinker production - Google Patents

Abstract

The utility model discloses a double-cyclone burner for cement clinker production, which comprises a main pipeline, wherein a fuel pipe is arranged inside the main pipeline, an axial flow air channel is arranged near one end of the front side of the main pipeline, an outer cyclone air channel is arranged near the middle of the outer side of the main pipeline, a pulverized coal air channel is arranged near the middle of the top surface of the main pipeline, an inner cyclone air channel is arranged between the outer cyclone air channel and the main pipeline, an adjusting device is arranged at one end of the main pipeline, and the inner cyclone air channel comprises an inner cyclone at the head part and an inner cyclone connecting piece; a two cyclone burner for cement clinker production adopt two cyclone technique, the air current is rotatory on one side and drives the buggy diffusion and gos forward, buggy and air mixing degree are higher, change the burning, possess lower wind account for than, stronger coal quality adaptability, more regular flame shape, longer life, more stable heating power concentrate and lower NOx emission advantage.

Description

Double-cyclone burner for cement clinker production

Technical Field

The utility model relates to a combustor field, in particular to a double cyclone combustor for cement clinker production.

Background

Pulverized coal combustion is widely applied in various industries, and along with the requirements of national policies in recent years, a combustor which is more economical, more environment-friendly and longer in service life is required in the cement industry;

the swirl burner used in the cement burning process in China at present mainly adopts single-layer swirl, the space of a combustion chamber is difficult to be effectively utilized, the pulverized coal directly enters the combustion chamber, the flow field in the combustion chamber is distorted, the mixing of the pulverized coal and air is not facilitated, the combustion efficiency is influenced, and the results of unstable combustion, low combustion efficiency, irregular flame shape, high NOx emission and the like are caused.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a double cyclone burner for cement clinker production can effectively solve the technical problem who proposes in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a two cyclone burner for cement clinker production, includes the main line, the internally mounted of main line has the fuel pipe, the front of main line is close to one end and installs the axial flow wind channel, the outside of main line is close to the centre and installs outer whirl wind channel, the top surface of main line is close to the centre and installs the buggy wind channel, install outer whirl wind channel between outer whirl wind channel and the main line, adjusting device is installed to the one end of main line, interior whirl wind channel includes swirler and interior swirler connecting piece in the head, the buggy wind channel includes head buggy export and middle part buggy export, outer whirl wind channel includes outer swirler of head and outer swirler connecting piece, the axial flow wind channel includes head sprayer and sprayer connecting piece, the big urceolus in head and the big urceolus in middle part are installed in the outside of main line.

As a further proposal of the utility model, four air intakes have been seted up to the main line, are buggy wind channel mouth, axial compressor wind channel mouth, interior whirl wind channel mouth and outer whirl wind channel mouth respectively, stagger along axial direction simultaneously by muffjoint between four air intakes.

As a further proposal of the utility model, a rotational flow inclined hole plate is arranged in the inner cyclone of the head part and the outer cyclone of the head part, the inner rotational flow wind is sprayed out along the tangential direction of the inclined hole, the inner cyclone of the head part and the inner rotational flow wind channel are movably arranged, and the tangential angle change range of the nozzle is 40-50 degrees.

As a further aspect of the utility model, the angle between buggy wind channel and the main line is 15, and swirler and interior swirler connecting piece, head coal dust export and middle part coal dust export, the outer swirler of head and outer swirler connecting piece all are threaded connection setting with head sprayer and sprayer connecting piece in the head.

As a further scheme of the utility model, all be bolted connection between the big urceolus of head and the big urceolus in middle part and the main line and set up, all be between burning oil pipe, interior whirl wind channel, buggy wind channel, outer whirl wind channel and the axial flow wind channel and link up the setting, burn oil pipe, interior whirl wind channel, buggy wind channel, outer whirl wind channel and axial flow wind channel and all be threaded connection with the main line and set up.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model adopts the double-cyclone technology, the airflow rotates and drives the pulverized coal to diffuse and advance, the mixing degree of the pulverized coal and the air is higher, and the combustion is easier; the double-cyclone burner has the advantages of lower primary air ratio, stronger coal adaptability, more regular flame shape, longer service life, more stable heat concentration and lower NOx emission.

Drawings

FIG. 1 is a schematic view of the overall structure of a dual cyclone burner for cement clinker production according to the present invention;

FIG. 2 is a schematic view of the dual cyclone burner for cement clinker production according to the present invention after adjusting the cyclone angle of the cyclone inside the head;

FIG. 3 is an expanded view of the swirler inclined hole in the head of the dual cyclone burner for cement clinker production according to the present invention;

FIG. 4 is a schematic view of a dual cyclone burner for cement clinker production according to the present invention;

FIG. 5 is a schematic structural diagram of a pulverized coal inlet of a dual cyclone burner for cement clinker production according to the present invention.

In the figure: 1. a big outer barrel at the head; 2. a head sprayer; 3. an outer head swirler; 4. a head pulverized coal outlet; 5. a head inner swirler; 6. an inner swirler connection; 7. a middle coal powder outlet; 8. an outer swirler connection; 9. an injector connection; 10. a middle large outer cylinder; 11. a fuel pipe.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-5, a double-cyclone burner for cement clinker production, which comprises a main pipeline, wherein a fuel pipe 11 is arranged inside the main pipeline, an axial flow air channel is arranged near one end of the front surface of the main pipeline, an outer cyclone air channel is arranged near the middle of the outer side of the main pipeline, a pulverized coal air channel is arranged near the middle of the top surface of the main pipeline, an outer cyclone air channel is arranged between the outer cyclone air channel and the main pipeline, an adjusting device is arranged at one end of the main pipeline, the inner cyclone air channel comprises a head inner cyclone 5 and an inner cyclone connecting piece 6, the pulverized coal air channel comprises a head pulverized coal outlet 4 and a middle pulverized coal outlet 7, the outer cyclone air channel comprises a head outer cyclone 3 and an outer cyclone connecting piece 8, the axial flow air channel comprises a head injector 2 and an injector connecting piece 9, and a head large outer cylinder 1 and a middle large outer cylinder 10 are arranged outside the main pipeline.

In this embodiment, in order to adjust the pressure in the combustor conveniently, the main pipeline is provided with four primary air inlets, which are a pulverized coal air duct opening, an axial flow air duct opening, an inner rotational flow air duct opening and an outer rotational flow air duct opening respectively, and the four primary air inlets are connected by a sleeve and staggered along the axial direction.

In this embodiment, in order to change the direction of the wind flow, swirl inclined hole plates are installed in both the head inner swirler 5 and the head outer swirler 3, the inner swirl wind is ejected along the tangential direction of the inclined holes, the head inner swirler 5 and the inner swirl wind channel are movably arranged, and the tangential angle change range at the nozzle is 40-50 °.

In this embodiment, in order to reduce the wear of pulverized coal when entering the burner body and improve the service life of the device, the angle between the pulverized coal air duct and the main pipeline is 15 °, and the head inner swirler 5 and the inner swirler connecting piece 6, the head pulverized coal outlet 4 and the middle pulverized coal outlet 7, the head outer swirler 3 and the outer swirler connecting piece 8 are all in threaded connection with the head injector 2 and the injector connecting piece 9.

In this embodiment, in order to ensure the stability of the burner, the large head outer barrel 1 and the large middle outer barrel 10 are connected to the main pipeline by bolts, the fuel pipes 11, the inner swirling air ducts, the pulverized coal air ducts, the outer swirling air ducts and the axial flow air ducts are connected to each other by a through manner, and the fuel pipes 11, the inner swirling air ducts, the pulverized coal air ducts, the outer swirling air ducts and the axial flow air ducts are connected to the main pipeline by threads.

It should be noted that, the utility model relates to a double cyclone burner for cement clinker production, when using, at first, the buggy passes through buggy wind channel entering pipeline, the buggy entry is through wear-resisting treatment, simultaneously through calculation simulation, make buggy wind channel entry and trunk line angle be 15, reduce the wearing and tearing that the buggy produced when entering the burner body, improve equipment's life, the buggy is spout from the head buggy export 4 of burner, form axial wind through head sprayer 2 after the primary air gets into axial flow wind channel, mix with the buggy that head buggy export 4 spun, bring the buggy to carry out axial motion, simultaneously because axial wind speed is too big, the secondary wind in the combustion chamber is drawn into the combustion head and continues to participate in the burning, through optimal design and reasonable matching of amount of wind, axial wind speed is greater than 300m/s, outer cyclone 160-180m/s, coal air and inner rotational flow air 140-160 m/s, because the axial flow air speed is large, the pressure difference of the combustion chamber is also increased, the stronger the ability of the burner to suck secondary air, the lower the proportion of the primary air to 6-7%, more cost saving and environmental protection, in addition, the primary air enters the rotational flow air duct and the outer rotational flow air duct respectively after entering the rotational flow air duct opening, the inner and outer rotational flow air duct openings are provided with valves which can control the air quantity of the inner and outer rotational flow air, the primary air of the inner rotational flow air duct passes through the inner swirler 5 at the head part, because the inner swirler 5 at the head part is provided with the rotational flow inclined hole plate with variable rotational flow angle, the rotational flow air is formed under the action of the rotational flow air and forms clamp belt with the coal powder entering at constant speed, the coal powder is fully dispersed in the combustion chamber to be fully mixed and rotated forwards, and the primary air entering the outer rotational flow air duct passes through the outer swirler 3 at the head part, because the outer swirler 3 at the rotational flow head part is provided with the rotational flow inclined hole plate with a certain angle, the rotary airflow is formed under the action of the double-swirl air, the rotating direction is the same as that of the inner swirl air, the pulverized coal and the inner swirl air are subjected to enhanced rotating trend at the outlet of the combustor and are mixed with the same for supporting combustion, and due to the action of the double-swirl air, the flame of the combustor is relatively regular and strong and has adjustable shape, the pulverized coal can be fully combusted, the coal quality adaptability is stronger, the utilization rate of fuel gas is improved, more stable thermal power concentration is realized, meanwhile, the generation and emission of NOx can be effectively inhibited by combining the oxygen-deficient combustion.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A double cyclone burner for cement clinker production is characterized in that: including the main line, the internally mounted of main line has fuel pipe (11), the front of main line is close to one end and installs the axial flow wind channel, the outside of main line is close to the centre and installs outer whirl wind channel, the top surface of main line is close to the centre and installs the buggy wind channel, install interior whirl wind channel between outer whirl wind channel and the main line, adjusting device is installed to the one end of main line, interior whirl wind channel includes swirler (5) and interior swirler connecting piece (6) in the head, the buggy wind channel includes head buggy export (4) and middle part buggy export (7), outer whirl wind channel includes outer swirler (3) of head and outer swirler connecting piece (8), the axial flow wind channel includes head sprayer (2) and sprayer connecting piece (9), the big urceolus (1) of head and the big urceolus (10) in middle part are installed in the outside of main line.

2. The dual cyclone burner for cement clinker production according to claim 1, wherein: four primary air inlets are formed in the main pipeline and respectively comprise a pulverized coal air duct opening, an axial flow air duct opening, an inner rotational flow air duct opening and an outer rotational flow air duct opening, and the four primary air inlets are connected through a sleeve and are staggered in the axial direction.

3. A dual cyclone burner for cement clinker production according to claim 1, characterized in that: the head inner swirler (5) and the head outer swirler (3) are both internally provided with swirl inclined hole plates, inner swirl air is sprayed out along the tangential direction of the inclined holes, the head inner swirler (5) and the inner swirl air duct are movably arranged, and the tangential angle change range of the nozzle is 40-50 degrees.

4. A dual cyclone burner for cement clinker production according to claim 1, characterized in that: the angle between the pulverized coal air duct and the main pipeline is 15 degrees, and the head inner swirler (5), the inner swirler connecting piece (6), the head pulverized coal outlet (4), the middle pulverized coal outlet (7), the head outer swirler (3), the outer swirler connecting piece (8), the head ejector (2) and the ejector connecting piece (9) are in threaded connection.

5. A dual cyclone burner for cement clinker production according to claim 1, characterized in that: the large outer barrel (1) at the head part and the large outer barrel (10) at the middle part are in bolted connection with the main pipeline, the fuel oil pipe (11), the inner rotational flow air channel, the pulverized coal air channel, the outer rotational flow air channel and the axial flow air channel are in through connection, and the fuel oil pipe (11), the inner rotational flow air channel, the pulverized coal air channel, the outer rotational flow air channel and the axial flow air channel are in threaded connection with the main pipeline.

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