Composite burner

Abstract

The invention discloses a composite burner, and relates to the technical field of coal chemical industry, the composite burner comprises a burner body, the bottom of the burner body is provided with a burner port communicated with a gasification furnace, and a cavity of the burner body is sequentially provided with 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 port 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 invention relates to the technical field of coal chemical industry, in particular to a composite burner. Background Art

[0002] The pulverized coal pressurized gasification device is an important facility in the field of modern coal chemical industry. The traditional pulverized coal pressurized gasification device includes independent preheating burners and process burners. During operation, the gasifier is first heated with fuel gas. After the gasifier reaches a certain temperature, the preheating burner is quickly replaced with the process burner to feed water-coal slurry and oxygen. However, in the actual operation process, there are the following defects:

[0003] First, during the ignition and heating stage of the preheating burner, as well as the subsequent replacement of the process burner, the gasifier must be kept in a negative pressure state to prevent the accidental ejection of the high-temperature flame in the furnace, which would cause safety hazards. Although the negative pressure furnace drying method ensures operational safety to a certain extent, it leads to a large consumption of fuel gas and steam, increasing production costs. At the same time, if the process burner is replaced too slowly, it is easy to cause the gasifier temperature to be low, which may cause the gasifier to fail to burn after the coal slurry is added.

[0004] Therefore, how to provide a composite burner that can achieve integrated preheating and feeding without switching the burner is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a composite burner, which solves the technical problem of realizing integrated work of preheating and feeding without switching the burner.

[0006] To achieve the above object, the present invention provides a composite burner, comprising:

[0007] A burner body, wherein a burner port connected to the gasifier is provided at the bottom of the burner body, an ignition channel, a second oxygen channel, a feeding channel, a first oxygen channel and a high-pressure steam channel connected to the burner port are provided in the burner body cavity from the inside to the outside, an igniter is provided in the ignition channel, the first oxygen channel and the second oxygen channel are both used to pass a mixed gas of oxygen and steam, the feeding channel is used to pass coal powder or organic waste liquid, the high-pressure steam channel is used to pass 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, it also includes:

[0009] An ignition tube, wherein the ignition passage is axially arranged in the ignition tube;

[0010] a second oxygen pipe, wherein the second oxygen pipe is sleeved on the outer periphery of the ignition pipe, and an annular gap between the second oxygen pipe and the ignition pipe constitutes the second oxygen channel;

[0011] A fuel pipe, wherein the fuel pipe is sleeved on the outer circumference of the second oxygen pipe, and an annular gap between the fuel pipe and the second oxygen pipe constitutes the feeding channel;

[0012] a first oxygen pipe, wherein the first oxygen pipe is sleeved on the outer circumference of the fuel pipe, and an annular gap between the first oxygen pipe and the fuel pipe is a first oxygen channel;

[0013] A high-pressure steam pipe is sleeved on the outer circumference of the first oxygen pipe, and an annular gap between the high-pressure steam pipe and the first oxygen pipe is a high-pressure steam channel.

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

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

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

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

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

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

[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] Compared with the above background technology, the composite burner provided by the present invention has the outlets of the second oxygen channel and the first oxygen channel used to spray a mixed gas of oxygen and steam, a combustion reaction occurs under the action of the igniter, and then combustion occurs at the burner mouth, and then the heat load in the furnace body can be adjusted by increasing the flow rate of the mixed gas of oxygen and steam, thereby preheating the coal slurry gasification furnace. When the preheating of the gasification furnace is completed, that is, when the temperature in the gasification furnace reaches the feeding temperature, the coal powder enters the furnace chamber of the gasification furnace through the feeding channel.

[0023] The outlet of the feeding channel is located above the outlet of the first oxygen channel and below the outlet of the second oxygen channel in the height direction, and the outlets of the first oxygen channel and the second oxygen channel respectively have an intersection angle with the outlet of the feeding channel, so that the two streams of oxygen and steam mixed gas from the first oxygen channel and the second oxygen channel fully atomize the pulverized coal sprayed from the outlet of the feeding channel by shearing and impacting. After the pulverized coal is atomized, its contact area with oxygen is greatly increased, thereby improving the rate and efficiency of the combustion reaction, and a high-pressure steam channel is arranged at the burner mouth (outside the first oxygen channel), so that the ejected high-pressure steam flow not only helps to further atomize the pulverized coal, but also ensures a good burner use condition.

[0024] In summary, the composite burner provided in the present application can realize integrated preheating and feeding without switching the burner, and can solve the problems of oxygen and steam consumption and heating difficulty of the existing negative pressure drying furnace, thereby shortening the start-up time of the gasification furnace and improving the working stability of the composite burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A front view of a composite burner provided by an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A partial enlarged schematic diagram of .

[0028] in:

[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 chamber, 14-cooling water inlet, 15-cooling water outlet, 16-connecting piece, 17-furnace body flange, 18-first flange seat, 19-second flange seat, 20-third flange seat, 21-fourth flange seat, 22-first oxygen-steam mixed gas inlet, 23-second oxygen-steam mixed gas inlet, 24-fuel inlet, 25-high-pressure steam inlet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Embodiment 1:

[0033] See also Figure 1-Figure 2 A composite burner provided in the present application comprises a burner body 1, a burner port connected to a gasifier 2 is provided at the bottom of the burner body 1, 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 connected to the burner port are provided in the cavity of the burner body 1 from inside to outside, an igniter is provided in the ignition channel 3, the first oxygen channel 6 and the second oxygen channel 4 are both used to introduce a mixed gas of oxygen and steam, the feeding channel 5 is used to introduce pulverized coal, and the high-pressure steam channel 7 is used to introduce high-pressure steam, and 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 have an intersection angle with the outlet of the feeding channel 5 respectively.

[0034] That is, the outlets of the second oxygen channel 4 and the first oxygen channel 6 are used to spray a mixed gas of oxygen and steam, a combustion reaction occurs under the action of the igniter, and then combustion occurs at the burner mouth, and then the heat load in the furnace body can be adjusted by increasing the flow rate of the mixed gas of oxygen and steam, thereby preheating the coal slurry gasifier. When the preheating of the gasifier is completed, that is, when the temperature in the gasifier reaches the feeding temperature, the coal powder enters the furnace chamber of the gasifier through the feeding channel 5.

[0035] The outlet of the feeding channel 5 is located 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 respectively have an intersection angle with the outlet of the feeding channel 5, so that the two streams of oxygen and steam mixed gas from the first oxygen channel 6 and the second oxygen channel 4 fully atomize the coal powder sprayed from the outlet of the feeding channel 5 by shearing and impacting. After the coal powder is atomized, its contact area with oxygen is greatly increased, thereby improving the rate and efficiency of the combustion reaction, and a high-pressure steam channel 7 is arranged at the burner mouth (outside the first oxygen channel 6), so that the ejected high-pressure steam flow not only helps to further atomize the coal powder, but also ensures a good burner use condition.

[0036] In summary, the composite burner provided in the present application can realize integrated preheating and feeding without switching the burner, and can solve the problems of oxygen and steam consumption and heating difficulty of the existing negative pressure drying furnace, thereby shortening the start-up time of the gasification furnace and improving the working stability of the composite burner.

[0037] On the basis of the above embodiment, it includes an ignition tube 8, and the ignition channel 3 is axially arranged in the ignition tube 8; a second oxygen tube 9, 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 a second oxygen channel 4; a fuel tube 10, 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 a feeding channel 5; a first oxygen tube 11, 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 a first oxygen channel 6; a high-pressure steam tube 12, 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 is a high-pressure steam channel 7.

[0038] That is to say, the ignition channel 3 is axially arranged in the ignition tube 8, and then the igniter is located inside the ignition tube 8, which is used to ignite 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, and the gap constitutes the second oxygen channel 4. The second oxygen channel 4 is used to pass the mixed gas of oxygen and steam to support the combustion process; the fuel pipe 10 is sleeved on the outer periphery of the second oxygen tube 9, and an annular gap is also formed between the second oxygen tube 9, and the gap constitutes the feeding channel 5, and the feeding channel 5 is used to pass the pulverized coal. When the pulverized coal passes through the outlet of the feeding channel 5, it will be affected by the mixed gas of oxygen and steam from the second oxygen channel 4 and the first oxygen channel 6 to achieve atomization.

[0039] The first oxygen pipe 11 is sleeved on the outer circumference of the fuel pipe 10, and the annular gap between the first oxygen pipe 11 and the fuel pipe 10 is the first oxygen channel 6. The first oxygen channel 6 is also used to pass a mixed gas of oxygen and steam. There is an intersection angle between its outlet and the outlet of the feeding channel 5 to further promote the atomization of 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 high-pressure steam pipe 12 and the first oxygen pipe 11 is the high-pressure steam channel 7. The high-pressure steam channel 7 is used to pass high-pressure steam, and the high-pressure steam flow ejected from the high-pressure steam pipe 12 not only helps the atomization of the coal powder, but also forms a stable airflow field at the burner mouth.

[0041] On the basis of the above-mentioned embodiment, a cooling cavity 13 is provided on the inner wall of the cavity of the burner body 1, and a cooling water inlet 14 and a cooling water outlet 15 connected to the cooling cavity 13 are provided on the burner body 1, that is, the cooling cavity 13 is arranged on the inner wall of the cavity of the burner body 1, forming 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 respectively arranged on the left and right sides of the burner body 1, for injecting and discharging 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 cavity wall, absorbs and takes away the heat generated by the burner body, and then is discharged through the outlet, forming a continuous cooling cycle.

[0042] Based on the above embodiment, the burner body 1 is connected to the furnace body flange 17 of the gasifier 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 tube 8 and the second oxygen tube 9 are connected by the first flange seat 18 to fix the relative positions of the two; the second oxygen tube 9 and the fuel tube 10 are connected by the second flange seat 19 to fix the relative positions of the two; the fuel tube 10 and the first oxygen tube 11 are connected by the third flange seat 20 to fix the relative positions of the two; the first oxygen tube 11 and the high-pressure steam tube 12 are connected by the fourth flange seat 21 to fix the relative positions of the two.

[0044] That is to say, the first flange seat 18, the second flange seat 19, the third flange seat 20 and the fourth flange seat 21 all include an upper flange and a lower flange, and the two flanges are connected together using bolts and nuts. The first flange seat 18 is specifically described as follows:

[0045] An upper flange is fixedly provided on the outer peripheral surface of the ignition tube 8, and a lower flange is fixedly provided on the upper end of the second oxygen tube 9. Then, the flanges of the ignition tube 8 and the second oxygen tube 9 are aligned so that the through holes of the flanges correspond to each other, and the two flanges are connected together using bolts and nuts.

[0046] Based on the above embodiment, the first oxygen pipe 11 and the second oxygen pipe 9 are respectively provided with a first oxygen-steam mixed gas inlet 22 and a second oxygen-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 to say, the first oxygen-steam mixed gas inlet 22 is arranged on the first oxygen pipe 11, and is used to introduce a mixture of oxygen and steam. The mixture of oxygen and steam can improve the combustion efficiency and help stabilize the flame. The second oxygen-steam mixed gas inlet 23 is arranged on the second oxygen pipe 9, and is also used to introduce a mixture of oxygen and steam. Compared with the first oxygen-steam mixed gas inlet 22, the combustion effect is further enhanced; the coal powder inlet is arranged on the fuel pipe 10, and is used to introduce coal powder. As the main fuel source, the amount of coal powder introduced can be adjusted through the coal powder inlet to meet different combustion requirements and load changes. By accurately controlling the supply amount of coal powder, 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, and is used to introduce high-pressure steam. The inlet amount of the above-mentioned mixture of oxygen and steam, coal powder and high-pressure steam can be adjusted by 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 this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0051] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A composite burner, characterized in that: include: A burner body (1), wherein a burner port connected to a gasifier (2) is provided at the bottom of the burner body (1), and 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) connected to the burner port are provided in the cavity of the burner body (1) from the inside to the outside in sequence, wherein an igniter is provided in the ignition channel (3), the first oxygen channel (6) and the second oxygen channel (4) are both used to pass a mixed gas of oxygen and steam, the feeding channel (5) is used to pass coal powder or organic waste liquid, and the high-pressure steam channel (7) is used to pass high-pressure steam, and the outlet of the feeding channel (5) is located 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).

2. A composite burner according to claim 1, characterized in that: Also includes: An ignition tube (8), wherein the ignition passage (3) is axially arranged in the ignition tube (8); A second oxygen tube (9), the second oxygen tube (9) being sleeved on the outer circumference of the ignition tube (8), the annular gap between the second oxygen tube (9) and the ignition tube (8) forming the second oxygen channel (4); a fuel pipe (10), the fuel pipe (10) being sleeved on the outer circumference of the second oxygen pipe (9), the annular gap between the fuel pipe (10) and the second oxygen pipe (9) constituting the feeding channel (5); a first oxygen pipe (11), the first oxygen pipe (11) being sleeved on the outer circumference of the fuel pipe (10), the annular gap between the first oxygen pipe (11) and the fuel pipe (10) being a first oxygen channel (6); A high-pressure steam pipe (12), the high-pressure steam pipe (12) being sleeved on the outer circumference of the first oxygen pipe (11), and an annular gap between the high-pressure steam pipe (12) and the first oxygen pipe (11) being a high-pressure steam channel (7).

3. A composite burner according to claim 2, characterized in that: A cooling cavity (13) is provided on the inner wall of the burner body (1) cavity, and a cooling water inlet (14) and a cooling water outlet (15) which are connected to the cooling cavity (13) are respectively provided on the burner body (1).

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

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

6. A composite burner according to claim 5, characterized in that: The second oxygen pipe (9) and the fuel pipe (10) are connected via a second flange seat (19) to fix the relative positions of the two.

7. A composite burner according to claim 6, characterized in that: The fuel pipe (10) and the first oxygen pipe (11) are connected via a third flange seat (20) to fix the relative positions of the two.

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 via a fourth flange seat (21) to fix the relative positions of the two.

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

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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