Composite burner

Abstract

The utility model discloses a composite burner, which relates to the technical field of coal chemical industry and comprises a burner body, the bottom of the burner body is provided with a burner opening communicated with a gasification furnace, and an ignition channel, a second oxygen channel, a feeding channel, a first oxygen channel and a high-pressure steam channel which are communicated with the burner opening are sequentially arranged in a cavity of the burner body from inside to outside. An igniter is arranged in the ignition channel, the first oxygen channel and the second oxygen channel are both used for introducing mixed gas of oxygen and steam, the feeding channel is used for introducing pulverized coal or organic waste liquid, and the high-pressure steam channel is used for introducing high-pressure steam; and the outlet of the first oxygen channel and the outlet of the second oxygen channel respectively have intersection angles with the outlet of the feeding channel. According to the composite burner, the technical problem that the integrated work of preheating and feeding can be achieved without switching burners is solved, and the technical effects that oxygen and steam consumption is reduced, and the working stability of the composite burner is improved are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal chemical industry, especially to a composite burner. BACKGROUND

[0002] The pulverized coal pressurized gasification device is an important facility in the modern coal chemical industry field, and the traditional pulverized coal pressurized gasification device comprises an independent preheating burner and a process burner. When running, the gasification furnace is first heated by fuel gas, and after the gasification furnace is heated to a certain temperature, the preheating burner is quickly replaced by the process burner to feed the coal water slurry and oxygen. However, in the actual operation process, the following defects exist:

[0003] Firstly, the preheating burner must ensure that the gasification furnace is in a negative pressure state during the ignition and temperature rising stage and the subsequent process burner replacement process to prevent the high-temperature flame in the furnace from accidentally spouting and causing safety hazards. Although the negative pressure furnace drying method can ensure the operation safety to a certain extent, it leads to a large consumption of fuel gas and steam and increases the production cost. At the same time, the process burner replacement speed is too slow, which can easily cause the gasification furnace temperature to be low and the coal slurry to be unable to be combusted after being fed.

[0004] Therefore, how to provide a composite burner that can realize preheating and feeding integration without switching the burner is a technical problem that needs to be solved by those skilled in the art at present. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a composite burner to solve the technical problem that preheating and feeding integration can be realized without switching the burner.

[0006] To achieve the above-mentioned purpose, the utility model provides a composite burner, which comprises:

[0007] A burner body is provided with a burner port communicated with a gasification furnace at the bottom, and a firing channel, a second oxygen channel, a feeding channel, a first oxygen channel and a high-pressure steam channel are sequentially arranged from inside to outside in the cavity of the burner body and communicated with the burner port. A igniter is arranged in the firing channel, the first oxygen channel and the second oxygen channel are both used for passing in the mixed gas of oxygen and steam, the feeding channel is used for passing in the coal powder or organic waste liquid, the high-pressure steam channel is used for passing in the high-pressure steam, the outlet of the feeding channel is between the outlet of the first oxygen channel and the outlet of the second oxygen channel in the height direction, and the outlet of the first oxygen channel and the outlet of the second oxygen channel respectively have an intersection angle with the outlet of the feeding channel.

[0008] Preferably, the utility model further comprises:

[0009] A firing tube is axially arranged in the firing channel.

[0010] a second oxygen pipe, which is sleeved on the outer periphery of the ignition pipe, and an annular gap between the second oxygen pipe and the ignition pipe forms the second oxygen passage;

[0011] a fuel pipe, which is sleeved on the outer periphery of the second oxygen pipe, and an annular gap between the fuel pipe and the second oxygen pipe forms the feeding passage;

[0012] a first oxygen pipe, which is sleeved on the outer periphery of the fuel pipe, and an annular gap between the first oxygen pipe and the fuel pipe forms the first oxygen passage;

[0013] a high-pressure steam pipe, which is sleeved on the outer periphery of the first oxygen pipe, and an annular gap between the high-pressure steam pipe and the first oxygen pipe forms the high-pressure steam passage.

[0014] Preferably, the inner wall of the burner body cavity is provided with a cooling cavity, and the burner body is respectively provided with a cooling water inlet and a cooling water outlet communicating with the cooling cavity.

[0015] Preferably, the burner body is connected with the furnace body flange of the gasification furnace through a connecting piece.

[0016] Preferably, the ignition pipe and the second oxygen pipe are connected through a first flange seat to fix the relative positions of the two.

[0017] Preferably, the second oxygen pipe and the fuel pipe are connected through a second flange seat to fix the relative positions of the two.

[0018] Preferably, the fuel pipe and the first oxygen pipe are connected through a third flange seat to fix the relative positions of the two.

[0019] Preferably, the first oxygen pipe and the high-pressure steam pipe are connected through a fourth flange seat to fix the relative positions of the two.

[0020] Preferably, the first oxygen pipe and the second oxygen pipe are respectively provided with a first oxygen-steam mixed gas inlet and a second oxygen-steam mixed gas inlet.

[0021] Preferably, the fuel pipe is provided with a fuel inlet, and the high-pressure steam pipe is provided with a high-pressure steam inlet.

[0022] With respect to the above background, the composite burner provided by the utility model, the outlets of the second oxygen channel and the first oxygen channel are used for spraying mixed gas of oxygen and steam, combustion reaction occurs under the action of the igniter, and then combustion is carried out at the burner port, and then the heat load in the furnace body can be adjusted by increasing the flow of the mixed gas of oxygen and steam, so that the coal slurry gasifier can be preheated. When the preheating of the gasifier is completed, that is, when the temperature in the gasifier reaches the feeding temperature, the pulverized coal enters the furnace cavity of the gasifier through the feeding channel at this time.

[0023] The outlet of the feeding channel is above the outlet of the first oxygen channel and below the outlet of the second oxygen channel in the height direction, and the outlet of the first oxygen channel, the outlet of the second oxygen channel and the outlet of the feeding channel have an intersection angle, and then the two streams of mixed gas of oxygen and steam of the first oxygen channel and the second oxygen channel make the pulverized coal sprayed by the outlet of the feeding channel fully atomized by shearing and impacting, the contact area of the pulverized coal after atomization is greatly increased, so that the rate and efficiency of the combustion reaction are improved, and the high-pressure steam channel is arranged at the outlet (outside the first oxygen channel) of the burner port, so that the high-pressure steam stream sprayed not only helps the further atomization of the pulverized coal, but also ensures good use of the burner.

[0024] In summary, the composite burner provided by the application can realize preheating and feeding integration without switching the burner, and can solve the problems of oxygen and steam consumption and difficulty in temperature rising of the existing negative pressure oven, so as to shorten the starting time of the gasifier and improve the working stability of the composite burner. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0026] Figure 1 A front view of the composite burner provided by the embodiment of the utility model;

[0027] Figure 2 For Figure 1 The local enlarged schematic view.

[0028] Among them:

[0029] 1-burner body, 2-gasifier, 3-ignition channel, 4-second oxygen channel, 5-feeding channel, 6-first oxygen channel, 7-high pressure steam channel, 8-ignition tube, 9-second oxygen tube, 10-fuel tube, 11-first oxygen tube, 12-high pressure steam tube, 13-cooling cavity, 14-cooling water inlet, 15-cooling water outlet, 16-connector, 17-furnace body flange, 18-first flange seat, 19-second flange seat, 20-third flange seat, 21-fourth flange seat, 22-first oxygen and steam mixture inlet, 23-second oxygen and steam mixture inlet, 24-fuel inlet, 25-high pressure steam inlet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Embodiment 1

[0033] Referring to Figures 1-2 The present application provides a composite burner, which comprises a burner body 1, the bottom of the burner body 1 is provided with a burner port communicating with a gasifier 2, and the burner body 1 is provided with, from inside to outside, an ignition channel 3, a second oxygen channel 4, a feeding channel 5, a first oxygen channel 6 and a high pressure steam channel 7 in sequence and communicating with the burner port, the ignition channel 3 is provided with an igniter, the first oxygen channel 6 and the second oxygen channel 4 are both used for passing in mixed gas of oxygen and steam, the feeding channel 5 is used for passing in coal powder, and the high pressure steam channel 7 is used for passing in high pressure steam, the outlet of the feeding channel 5 is between the outlet of the first oxygen channel 6 and the outlet of the second oxygen channel 4 in the height direction, and the outlet of the first oxygen channel 6 and the outlet of the second oxygen channel 4 respectively have an intersection angle with the outlet of the feeding channel 5.

[0034] That is, the outlets of the second oxygen channel 4 and the first oxygen channel 6 are used for spraying mixed gas of oxygen and steam, which burns under the action of the igniter, and then burns at the burner port, and then the heat load in the furnace body can be adjusted by increasing the flow of the mixed gas of oxygen and steam, so that the coal slurry gasifier can be preheated. When the gasifier is preheated, that is, when the temperature in the gasifier reaches the feeding temperature, the coal powder enters the furnace cavity of the gasifier through the feeding channel 5 at this time.

[0035] The outlet of the feeding channel 5 is above the outlet of the first oxygen channel 6 and below the outlet of the second oxygen channel 4 in the height direction, and the outlets of the first oxygen channel 6 and the second oxygen channel 4 and the outlet of the feeding channel 5 have intersection angles, respectively. Then, the mixed gas of the two oxygen and steam of the first oxygen channel 6 and the second oxygen channel 4 can fully atomize the coal powder sprayed from the outlet of the feeding channel 5 by shearing and impacting, and the contact area of the coal powder after atomization is greatly increased, thereby improving the rate and efficiency of the combustion reaction. In addition, the high-pressure steam channel 7 is arranged outside the first oxygen channel 6 at the burner port, and the high-pressure steam flow sprayed out not only helps the further atomization of the coal powder, but also ensures the good use of the burner.

[0036] In summary, the composite burner provided by the application can realize the integration of preheating and feeding without switching the burner, and can solve the problems of oxygen and steam consumption and difficulty in temperature rising of the existing negative pressure oven, thereby shortening the start-up time of the gasifier and improving the working stability of the composite burner.

[0037] On the basis of the above-mentioned embodiment, the ignition channel 3 is axially arranged in the ignition tube 8; the second oxygen tube 9 is sleeved on the outer periphery of the ignition tube 8, and the annular gap between the second oxygen tube 9 and the ignition tube 8 constitutes the second oxygen channel 4; the fuel tube 10 is sleeved on the outer periphery of the second oxygen tube 9, and the annular gap between the fuel tube 10 and the second oxygen tube 9 constitutes the feeding channel 5; the first oxygen tube 11 is sleeved on the outer periphery of the fuel tube 10, and the annular gap between the first oxygen tube 11 and the fuel tube 10 constitutes the first oxygen channel 6; and the high-pressure steam tube 12 is sleeved on the outer periphery of the first oxygen tube 11, and the annular gap between the high-pressure steam tube 12 and the first oxygen tube 11 constitutes the high-pressure steam channel 7.

[0038] That is, the ignition channel 3 is axially arranged in the ignition tube 8, and the igniter is located in the interior of the ignition tube 8 for igniting the mixed gas of oxygen and steam; the second oxygen tube 9 is sleeved on the outer periphery of the ignition tube 8, and an annular gap is formed between the second oxygen tube 9 and the ignition tube 8, which constitutes the second oxygen channel 4. The second oxygen channel 4 is used for introducing the mixed gas of oxygen and steam to support the combustion process; the fuel tube 10 is sleeved on the outer periphery of the second oxygen tube 9, and an annular gap is also formed between the fuel tube 10 and the second oxygen tube 9, which constitutes the feeding channel 5. The feeding channel 5 is used for introducing the coal powder, and the coal powder will be atomized when passing through the outlet of the feeding channel 5 by the action of the mixed gas of oxygen and steam from the second oxygen channel 4 and the first oxygen channel 6.

[0039] The first oxygen pipe 11 is sleeved on the outer periphery of the fuel pipe 10, and the annular gap between the fuel pipe 10 and the first oxygen pipe 11 is the first oxygen channel 6. The first oxygen channel 6 is also used for passing in the mixed gas of oxygen and steam, and the outlet of the first oxygen channel 6 is intersected with the outlet of the feeding channel 5 to further promote the atomization of the coal powder.

[0040] The high-pressure steam pipe 12 is sleeved on the outer periphery of the first oxygen pipe 11, and the annular gap between the first oxygen pipe 11 and the high-pressure steam pipe 12 is the high-pressure steam channel 7. The high-pressure steam channel 7 is used for passing in high-pressure steam. The high-pressure steam flow sprayed out not only helps the atomization of the coal powder, but also forms a stable airflow field at the burner port.

[0041] On the basis of the above embodiment, the burner body 1 is provided with a cooling cavity 13 in the inner wall of the cavity. The burner body 1 is provided with a cooling water inlet 14 and a cooling water outlet 15 respectively connected to the cooling cavity 13. That is, the cooling cavity 13 is arranged on the inner wall of the cavity of the burner body 1 to form an annular cooling channel. The material of the cooling cavity 13 should be selected from high-quality alloy materials that can withstand high temperature and high pressure to ensure its stability and durability in a long-term high-temperature environment. The cooling water inlet 14 and the cooling water outlet 15 are arranged on the left and right sides of the burner body 1 respectively, and are used to inject and discharge cooling water into and out of the cooling cavity 13. After the cooling water enters the cooling cavity through the inlet, it flows along the wall surface of the cavity, absorbs and carries away the heat generated by the burner body, and then is discharged through the outlet to form a continuous cooling cycle.

[0042] On the basis of the above embodiment, the burner body 1 is connected to the furnace body flange 17 of the gasification furnace 2 through the connecting piece 16. That is, the connecting piece 16 can be a connecting plate, and the connecting piece 16 and the furnace body flange 17 are connected by bolts to ensure the stability of the connection.

[0043] On the basis of the above embodiment, the ignition pipe 8 and the second oxygen pipe 9 are connected by the first flange seat 18 to fix the relative positions of the two; the second oxygen pipe 9 and the fuel pipe 10 are connected by the second flange seat 19 to fix the relative positions of the two; the fuel pipe 10 and the first oxygen pipe 11 are connected by the third flange seat 20 to fix the relative positions of the two; and the first oxygen pipe 11 and the high-pressure steam pipe 12 are connected by the fourth flange seat 21 to fix the relative positions of the two.

[0044] That is, the first flange seat 18, the second flange seat 19, the third flange seat 20 and the fourth flange seat 21 each include an upper flange plate and a lower flange plate, and the two flange plates are connected together by bolts and nuts. Take the first flange seat 18 as an example:

[0045] The outer peripheral surface of the ignition tube 8 is fixedly provided with an upper flange plate, and the upper end of the second oxygen pipe 9 is fixedly provided with a lower flange plate, then the flange plates of the ignition tube 8 and the second oxygen pipe 9 are aligned, the through holes of the flange plates correspond to each other, and the two flange plates are connected together by using bolts, nuts fasteners.

[0046] On the basis of the above embodiment, the first oxygen pipe 11 and the second oxygen pipe 9 are correspondingly provided with a first oxygen and steam mixed gas inlet 22 and a second oxygen and steam mixed gas inlet 23; the fuel pipe 10 is provided with a fuel inlet 24, and the high-pressure steam pipe 12 is provided with a high-pressure steam inlet 25.

[0047] That is, the first oxygen and steam mixed gas inlet 22 is arranged on the first oxygen pipe 11, which is used to introduce the mixture of oxygen and steam, and the mixture of oxygen and steam can improve the combustion efficiency and help to stabilize the flame; the second oxygen and steam mixed gas inlet 23 is arranged on the second oxygen pipe 9, which is also used to introduce the mixture of oxygen and steam. Compared with the first oxygen and steam mixed gas inlet 22, the combustion effect is further enhanced; the pulverized coal inlet is arranged on the fuel pipe 10, which is used to introduce the pulverized coal. The pulverized coal serves as the main fuel source, and its introduction amount can be adjusted through the pulverized coal inlet to meet different combustion requirements and load changes. By accurately controlling the supply amount of the pulverized coal, the combustion process can be optimized, and the combustion efficiency and stability can be improved. The high-pressure steam inlet 25 is arranged on the high-pressure steam pipe 12, which is used to introduce high-pressure steam, and the introduction amounts of the above-mentioned mixture of oxygen and steam, the pulverized coal and the high-pressure steam can be adjusted through the control valve.

[0048] Embodiment 2:

[0049] The difference between this embodiment and embodiment 1 is that the feeding channel 5 is used to introduce organic waste liquid.

[0050] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0051] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above embodiment is only used to help understand the method and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A composite burner, characterized in that, include: The burner body (1) has a burner port at the bottom that communicates with the gasifier (2). The burner body (1) has an ignition channel (3), a second oxygen channel (4), a feeding channel (5), a first oxygen channel (6), and a high-pressure steam channel (7) that communicate with the burner port in sequence from the inside to the outside. The ignition channel (3) is equipped with an igniter. The first oxygen channel (6) and the second oxygen channel (4) are used to introduce a mixture of oxygen and steam. The feeding channel (5) is used to introduce pulverized coal or organic waste liquid. The high-pressure steam channel (7) is used to introduce high-pressure steam. The outlet of the feeding channel (5) is located in the height direction between the outlet of the first oxygen channel (6) and the outlet of the second oxygen channel (4). The outlets of the first oxygen channel (6) and the second oxygen channel (4) have an intersection angle with the outlet of the feeding channel (5).

2. The composite burner according to claim 1, characterized in that, Also includes: Ignition tube (8), the ignition channel (3) is axially disposed inside the ignition tube (8); The second oxygen tube (9) is sleeved on the outer periphery of the ignition tube (8), and the annular gap between the second oxygen tube (9) and the ignition tube (8) forms the second oxygen channel (4). Fuel pipe (10) is sleeved on the outer periphery of the second oxygen pipe (9), and the annular gap between the fuel pipe (10) and the second oxygen pipe (9) forms the feeding channel (5). The first oxygen tube (11) is sleeved on the outer periphery of the fuel tube (10), and the annular gap between the first oxygen tube (11) and the fuel tube (10) is the first oxygen channel (6). High-pressure steam pipe (12) is sleeved on the outer periphery of the first oxygen pipe (11), and the annular gap between the high-pressure steam pipe (12) and the first oxygen pipe (11) is a high-pressure steam channel (7).

3. A composite burner according to claim 2, characterized in that, The burner body (1) has a cooling chamber (13) on its inner wall, and the burner body (1) has a cooling water inlet (14) and a cooling water outlet (15) that are connected to the cooling chamber (13).

4. A composite burner according to claim 3, characterized in that, The burner body (1) is connected to the furnace flange (17) of the gasifier (2) via a connector (16).

5. A composite burner according to claim 2, characterized in that, The ignition tube (8) and the second oxygen tube (9) are connected by a first flange seat (18) to fix their relative positions.

6. A composite burner according to claim 5, characterized in that, The second oxygen pipe (9) and the fuel pipe (10) are connected by a second flange (19).

7. A composite burner according to claim 6, characterized in that, The fuel pipe (10) and the first oxygen pipe (11) are connected by a third flange (20).

8. A composite burner according to claim 7, characterized in that, The first oxygen pipe (11) and the high-pressure steam pipe (12) are connected by a fourth flange (21).

9. A composite burner according to claim 2, characterized in that, The first oxygen pipe (11) and the second oxygen pipe (9) are respectively provided with a first oxygen-vapor mixture inlet (22) and a second oxygen-vapor mixture inlet (23).

10. A composite burner according to claim 9, characterized in that, The fuel pipe (10) is provided with a fuel inlet (24), and the high-pressure steam pipe (12) is provided with a high-pressure steam inlet (25).

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