Gasification furnace ignition burner

Abstract

The utility model provides an ignition burner of a gasification furnace. The ignition burner of the gasification furnace comprises a combustion chamber, an ignition device and an ignition device, wherein a combustion cavity is formed in the combustion chamber; the first shell is arranged outside the side wall of the combustion chamber in a sleeving mode, and the first shell and the side wall are arranged in a spaced mode so as to form an interlayer channel; the air cooling mechanism is communicated with the interlayer channel so as to introduce cooling air into the interlayer channel; the peripheral cooling air waist pipe penetrates through the side wall of the combustion chamber so as to communicate the combustion cavity with the interlayer channel and distribute cooling air in the interlayer channel to the combustion cavity; wherein a plurality of circumferential cooling air waist pipes are uniformly arranged in the circumferential direction of the combustion chamber; cooling air is introduced into the interlayer channel to cool the side wall of the combustion chamber; cooling air in the interlayer channel is shunted to the combustion cavity through the peripheral cooling air waist pipe, so that the temperature in the combustion cavity is reduced; and the peripheral cooling air waist pipes are uniformly arranged, so that the temperature of the side wall of the combustion chamber is more uniform, and the phenomena of redness, deformation, even cracking and falling of the side wall of the combustion chamber are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler ignition, and in particular to a gasifier ignition burner. BACKGROUND

[0002] A circulating fluidized bed boiler is a boiler using fluidized bed combustion. The gasifier ignition burner is used to generate fluidized air at a certain temperature, and the fluidized air is introduced into the hearth of the circulating fluidized bed boiler to ignite the furnace charge in the hearth, thereby starting the circulating fluidized bed boiler.

[0003] The gasifier ignition burner in the related art generally comprises a combustion chamber, an oil gun and an ignition gun. The oil gun has an oil injection end extending into the combustion chamber for injecting oil mist into the combustion chamber. The combustion chamber has a combustion cavity into which combustion-supporting air is introduced, and the ignition end of the ignition gun extends into the combustion cavity to ignite the oil mist. The oil mist is combusted in the combustion chamber to generate high-temperature flue gas, and the high-temperature flue gas is combined with the combustion-supporting air to form fluidized air at 1000-1100℃. The side wall of the combustion chamber is prone to redness, deformation or even cracking and falling off under the condition of long-time high-temperature bearing. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to provide a gasifier ignition burner to at least solve the problem of redness, deformation or even cracking and falling off of the side wall of the combustion chamber in the prior art.

[0005] To solve the above technical problems, the present application is implemented as follows:

[0006] The present application provides a gasifier ignition burner, which comprises:

[0007] a combustion chamber, wherein a combustion cavity is arranged in the combustion chamber;

[0008] a first shell, which is sleeved on the side wall of the combustion chamber and is arranged in a spaced manner with the side wall to form a sandwich channel;

[0009] a circumferential cooling air waist pipe, which penetrates the side wall of the combustion chamber to communicate the combustion cavity and the sandwich channel;

[0010] a wind cooling mechanism, which communicates with the sandwich channel to introduce cooling air into the sandwich channel;

[0011] The circumferential cooling air waist pipe is a plurality of circumferential cooling air waist pipes, and the plurality of circumferential cooling air waist pipes are uniformly distributed along the circumference of the combustion chamber. The circumferential cooling air waist pipe is used to divide the cooling air in the sandwich channel into the combustion cavity.

[0012] Optionally, the combustion chamber has a first end and a second end arranged away from each other along a first direction.

[0013] The gasifier ignition burner further comprises an oil gun, an ignition gun and a pusher, the oil injection end of the oil gun is inserted into the combustion cavity from the first end, the ignition end of the ignition gun is movably inserted into the first end, and the ignition end of the ignition gun is close to the oil injection end of the oil gun to ignite the oil mist sprayed from the oil injection end of the oil gun.

[0014] The peripheral cooling air waist pipe has a third end and a fourth end away from the setting, the third end is communicated with the interlayer channel, and the fourth end is communicated with the combustion cavity.

[0015] The peripheral cooling air waist pipe is inclinedly arranged relative to the side wall of the combustion chamber, and the fourth end extends away from the first end.

[0016] Optionally, along the first direction, the distance between the fourth end and the first end is a first distance, and the distance between the fourth end and the second end is a second distance, and the first distance is less than the second distance.

[0017] Optionally, along the first direction, the fourth end of the peripheral cooling air waist pipe has a spacing with the oil injection end of the oil gun, and the fourth end is located on the side of the oil injection end of the oil gun towards the second end.

[0018] Optionally, the peripheral cooling air waist pipe is connected with a guide pipe through a connecting pipe, and the guide pipe is located in the combustion cavity.

[0019] The guide pipe extends away from the first end along the first direction.

[0020] One end of the connecting pipe is connected with the guide pipe, and the other end is sleeved outside the peripheral cooling air waist pipe.

[0021] Optionally, the side wall of the combustion chamber is provided with an air outlet close to the second end, the air outlet is communicated with the interlayer channel, and the air outlet is used for discharging the cooling air in the interlayer channel.

[0022] The air outlet has an air outlet amount greater than that of the peripheral cooling air waist pipe.

[0023] Optionally, the ratio of the air outlet amount of the air outlet to the air outlet amount of the peripheral cooling air waist pipe is a target ratio, and the target ratio ranges from 1.8 to 2.2.

[0024] Optionally, the oil injection end of the oil gun is provided with a nozzle, and the atomizing angle of the nozzle ranges from 45° to 60°.

[0025] Optionally, the side wall of the combustion chamber comprises a second shell and a cast layer arranged in layers, and the cast layer is sleeved in the second shell.

[0026] The circumferential cooling air waist pipe penetrates through the second shell and the casting layer.

[0027] Optionally, the air cooling mechanism comprises a cooling air pipe;

[0028] The cooling air pipe is in communication with the interlayer channel to introduce cooling air into the interlayer channel;

[0029] The gasifier ignition burner further comprises a control unit, the control unit comprising a first temperature sensor, a first air door and a controller;

[0030] The first temperature sensor is located on the side wall of the combustion chamber, the first air door is located on the cooling air pipe, the controller is connected with the first temperature sensor, and the controller is connected with the first air door;

[0031] The controller is used for adjusting the opening degree of the first air door according to the temperature collected by the first temperature sensor.

[0032] In the above embodiment, by arranging the first shell outside the side wall of the combustion chamber at intervals, the interlayer channel is formed between the side wall of the combustion chamber and the first shell, the interlayer channel is communicated with the air cooling mechanism, and the cooling air is introduced into the interlayer channel, so that the side wall of the combustion chamber can be cooled to avoid redness, deformation or even cracking and falling off of the side wall of the combustion chamber; by arranging the circumferential cooling air waist pipe, the circumferential cooling air waist pipe penetrates through the side wall of the combustion chamber, so that the combustion chamber and the interlayer channel can be communicated, and the cooling air in the interlayer channel can be shunted into the combustion chamber, thereby reducing the temperature of the fluidized air flowing in the combustion chamber, and further avoiding the problems of redness, deformation or even cracking and falling off of the side wall of the combustion chamber; by uniformly arranging a plurality of circumferential cooling air waist pipes along the circumference of the combustion chamber, the cooling air in the interlayer channel can uniformly enter the combustion chamber, so that the temperature of the side wall of the combustion chamber is more uniform along the circumference of the combustion chamber, and the deformation of the side wall of the combustion chamber due to uneven temperature is avoided.

[0033] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a front view cross-sectional view of the gasifier ignition burner in the embodiment of the application;

[0035] Figure 2 is a front view cross-sectional view of the gasifier ignition burner in the embodiment of the application; Figure 1 is a B-B cross-sectional view of

[0036] Figure 3 is a front view cross-sectional view of the combustion chamber in the embodiment of the application;

[0037] Figure 4 is Figure 3 a C-C profile view of

[0038] Figure 5 is Figure 3 a close-up view of D in

[0039] Reference signs:

[0040] 1, combustion chamber; 11, combustion cavity; 12, first end; 13, second end; 14, air outlet; 15, second shell; 151, anchor nail; 16, cast layer; 2, first shell; 3, interlayer channel; 4, peripheral cooling air waist pipe; 41, third end; 42, fourth end; 43, guide pipe; 44, connecting pipe; 5, oil gun; 6, air cooling mechanism; 61, first air door; 62, second air door; 7, pusher; 8, ignition gun; 9, furnace. DETAILED DESCRIPTION

[0041] Embodiments of the present application will be described in detail below with reference to drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to drawings are exemplary only, and are used only for explanation of the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0043] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The following will be described in detail Figures 1-5 The gasification furnace ignition burner of the embodiment of the present application is described.

[0046] Reference Figure 1 The embodiment of the present application proposes a gasification furnace ignition burner, which comprises: a combustion chamber 1, a combustion chamber 1 is provided with a combustion cavity 11; a first shell 2, the first shell 2 is sleeved on the side wall of the combustion chamber 1, and is arranged with the side wall to form a sandwich channel 3; a circumferential cooling air waist pipe 4, the circumferential cooling air waist pipe 4 penetrates the side wall of the combustion chamber 1 to communicate the combustion cavity 11 and the sandwich channel 3; a wind cooling mechanism 6, the wind cooling mechanism 6 communicates with the sandwich channel 3 to pass cooling air into the sandwich channel 3; the circumferential cooling air waist pipe 4 is multiple, and the multiple circumferential cooling air waist pipes 4 are uniformly distributed along the circumference of the combustion chamber 1, and the circumferential cooling air waist pipe 4 is used for shunting the cooling air in the sandwich channel 3 to the combustion cavity 11.

[0047] In the above embodiment, by arranging the first shell 2 outside the side wall of the combustion chamber 1, the sandwich channel 3 is formed between the side wall of the combustion chamber 1 and the first shell 2, the sandwich channel 3 is communicated with the wind cooling mechanism 6, and the cooling air is passed into the sandwich channel 3, which can cool the side wall of the combustion chamber 1, avoid the side wall of the combustion chamber 1 from red, deformation or even cracking and falling off; by arranging the circumferential cooling air waist pipe 4, the circumferential cooling air waist pipe 4 penetrates the side wall of the combustion chamber 1, so that the combustion cavity 11 and the sandwich channel 3 can be communicated, so that the cooling air in the sandwich channel 3 can be shunted to the combustion cavity 11, thereby reducing the temperature of the fluidized air flowing in the combustion chamber 1, and avoiding the problem of red, deformation or even cracking and falling off of the side wall of the combustion chamber 1; by uniformly arranging multiple circumferential cooling air waist pipes 4 along the circumference of the combustion chamber 1, the cooling air in the sandwich channel 3 can enter the combustion cavity 11 uniformly, so that the temperature of the side wall of the combustion chamber 1 is more uniform along the circumference of the combustion chamber 1, and the deformation of the side wall of the combustion chamber 1 due to uneven temperature is avoided.

[0048] In the above embodiment, reference Figure 1The combustion chamber 1 can be a cylinder structure with both ends open, and the internal cavity of the cylinder structure is the combustion cavity 11. The combustion chamber 1 can also be a horn structure, a hollow circular table structure or other shapes, and the embodiments of the present application are not limited specifically. The first shell 2 is sleeved on the outer side wall of the combustion chamber 1, and the shape of the first shell 2 can be the same as or different from that of the combustion chamber 1.

[0049] In the above embodiments, with reference to Figure 1 Along the circumference of the first shell 2, the side wall of the first shell 2 and the side wall of the combustion chamber 1 can be connected, and a connecting piece can be arranged in the interlayer passage 3, one end of the connecting piece being connected with the side wall of the first shell 2 and the other end being connected with the side wall of the combustion chamber 1. The connection can also be in other forms, and the embodiments of the present application are not limited specifically as long as the cooling air can flow in the interlayer passage 3.

[0050] In the above embodiments, the air cooling mechanism 6 can be a wind cooling heat exchanger known to those skilled in the art, and an air outlet pipe is connected to the wind cooling heat exchanger and communicates with the interlayer passage 3. The air cooling mechanism 6 can also be other structures, and the above embodiments are not limited specifically.

[0051] In the above embodiments, the circumferential cooling air waist pipe 4 can be a circular pipe, a square pipe or other shaped pipes, and the embodiments of the present application are not limited specifically.

[0052] In the above embodiments, the number of circumferential cooling air waist pipes 4 can be 6, 8, 12, 16 or the like, and the embodiments of the present application are not limited specifically. With reference to Figure 1 、 Figure 2 Along the first direction A, the plurality of circumferential cooling air waist pipes 4 can be uniformly distributed at a certain position away from the first end 12, and along the first direction A, the plurality of circumferential cooling air waist pipes 4 can also be arranged at a plurality of different positions away from the first end 12 and along the circumference of the combustion chamber 1, and the embodiments of the present application are not limited specifically.

[0053] In the above embodiments, with reference to Figure 1The gasifier ignition burner can further comprise an oil gun 5, an ignition gun 8 and a propeller 7. The gasifier ignition burner is used to start up a circulating fluidized bed boiler. One end of the combustion chamber 1 is connected to a furnace 9 of the circulating fluidized bed boiler, and the ignition gun 8 ignites the oil mist sprayed by the oil gun 5 at the other end of the combustion chamber 1 to form high-temperature flue gas. The end of the combustion chamber 1 close to the oil gun 5 is also connected to a combustion-supporting air, which is combined with the high-temperature flue gas to form fluidizing air at a certain temperature. The fluidizing air flows into the furnace 9 of the circulating fluidized bed boiler through the combustion cavity 11, and the temperature of the furnace charge in the furnace 9 is raised to a certain temperature, so that the furnace charge can be ignited and the circulating fluidized bed boiler can be started up. The air cooling mechanism 6 introduces cooling air into the interlayer passage 3 to cool the side wall of the combustion chamber 1. Part of the cooling air in the interlayer passage 3 enters the combustion cavity 11 through the circumferential cooling air waist pipe 4, which reduces the temperature of the fluidizing air and helps to avoid the side wall of the combustion chamber 1 from being red, deformed or even falling off. The remaining cooling air in the interlayer passage 3 flows out of the interlayer passage 3 from the end away from the oil gun 5, so that the cooling air in the interlayer passage 3 can flow.

[0054] Optionally, referring to Figure 1 , the combustion chamber 1 has a first end 12 and a second end 13 arranged away from each other along a first direction A; the gasifier ignition burner further comprises an oil gun 5, an ignition gun 8 and a propeller 7, the oil injection end of the oil gun 5 extends into the combustion cavity 11 from the first end 12, the ignition end of the ignition gun 8 is movably arranged at the first end 12, and the ignition end of the ignition gun 8 is close to the oil injection end of the oil gun 5 to ignite the oil mist sprayed by the oil injection end of the oil gun 5; the circumferential cooling air waist pipe 4 has a third end 41 and a fourth end 42 arranged away from each other, the third end 41 is in communication with the interlayer passage 3, and the fourth end 42 is in communication with the combustion cavity 11; the circumferential cooling air waist pipe 4 is arranged obliquely relative to the side wall of the combustion chamber 1, and the fourth end 42 extends away from the first end 12.

[0055] Specifically, referring to Figure 1 , the first direction A is the axial direction of the combustion chamber 1.

[0056] In the above embodiment, referring to Figure 1 , since the circumferential cooling air waist pipe 4 is arranged obliquely relative to the side wall of the combustion chamber 1, the flow direction of the cooling air in the interlayer passage 3 that is divided into the circumferential cooling air waist pipe 4 is oblique relative to the side wall of the combustion chamber 1; and since the cooling air in the interlayer passage 3 close to the circumferential cooling air waist pipe 4 flows along the side wall of the combustion chamber 1, and the fluidizing air in the combustion cavity 11 close to the circumferential cooling air waist pipe 4 also flows along the side wall of the combustion chamber 1, compared with the case that the circumferential cooling air waist pipe 4 is arranged vertically relative to the side wall of the combustion chamber 1, the resistance is smaller when the cooling air in the interlayer passage 3 is divided into the combustion cavity 11 when the circumferential cooling air waist pipe 4 is arranged obliquely relative to the side wall of the combustion chamber 1. Referring to Figure 1Since the oil injection end of the oil gun 5 extends into the combustion chamber 11 by the first end 12, the fourth end 42 of the annular cooling air waist pipe 4 extends away from the first end 12, and the fourth end 42 also extends away from the oil gun 5, so the cooling air in the annular cooling air waist pipe 4 has a component along the flow direction of the fluidizing air, which helps the cooling air in the combustion chamber 11 to converge with the fluidizing air, avoids mutual collision of the cooling air and the fluidizing air, and can reduce interference with the fluidizing air.

[0057] In the above embodiment, referring to Figure 1 and Figure 2 , the third end 41 of the annular cooling air waist pipe 4 can be in communication with the interlayer passage 3 but not extend into the interlayer passage 3, that is, the third end 41 can be flush with the outer side wall of the combustion chamber 1, so as to avoid the third end 41 protruding from the outer side wall of the combustion chamber 1 to increase air resistance, and to make the cooling air in the interlayer passage 3 flow more smoothly into the annular cooling air waist pipe 4. The fourth end 42 of the annular cooling air waist pipe 4 can be in communication with the combustion chamber 11 but not extend into the combustion chamber 11, that is, the fourth end 42 can be flush with the inner side wall of the combustion chamber 1, so as to avoid the fourth end 42 protruding from the inner side wall of the combustion chamber 1 to increase air resistance, and to avoid the fourth end 42 affecting the flow direction of the fluidizing air.

[0058] In the above embodiment, referring to Figure 1 , the oil gun 5 can be mounted at the first end 12 of the combustion chamber 1, and the mounting mode can be fixed connection or detachable connection, which is not limited in the embodiment of the application.

[0059] In the above embodiment, referring to Figure 1 , the pusher 7 can be connected to one end of the ignition gun 8 away from the ignition end, for driving the ignition gun 8 to move, so as to switch the ignition gun 8 between the first position and the second position; when the ignition gun 8 is in the first position, the ignition end of the ignition gun 8 extends into the combustion chamber 11, and can ignite the oil mist sprayed by the oil gun 5; when the ignition gun 8 is in the second position, the ignition end of the ignition gun 8 moves out of the combustion chamber 11, and can avoid being burnt out. The pusher 7 can be driven by hydraulic pressure or electrically driven, which can be selected by those skilled in the art as needed. The pusher 7 and the ignition gun 8 are conventional technologies in the art, and will not be described here.

[0060] Optionally, referring to Figure 1 , in the first direction A, the distance between the fourth end 42 and the first end 12 is a first distance D1, and the distance between the fourth end 42 and the second end 13 is a second distance D2, and the first distance D1 is less than the second distance D2.

[0061] In the above embodiment, since the first distance D1 is smaller than the second distance D2, along the first direction A, the distance between the fourth end 42 and the first end 12 is smaller than the distance between the fourth end 42 and the second end 13. Compared with the case that the first distance D1 is not smaller than the second distance D2, the case that the first distance D1 is smaller than the second distance D2 can prolong the flow path and flow time of the cooling air in the combustion chamber 11, so as to more effectively reduce the temperature of the fluidized air in the combustion chamber 11, and improve the cooling effect on the side wall of the combustion chamber 1.

[0062] Specifically, the ratio D2 / D1 of the second distance D2 to the first distance D1 can be 2, or 1.5, 3, etc., which can be selected by those skilled in the art according to actual needs.

[0063] Optionally, referring to Figure 1 , along the first direction A, the fourth end 42 is spaced apart from the oil injection end of the oil gun 5, and the fourth end 42 is located on the side of the oil injection end of the oil gun 5 facing the second end 13.

[0064] In the above embodiment, since along the first direction A, the fourth end 42 is spaced apart from the oil injection end of the oil gun 5, and the fourth end 42 is located on the side of the oil injection end of the oil gun 5 facing the second end 13, under the action of the combustion-supporting air, the flue gas generated after the oil mist sprayed by the oil gun 5 is ignited needs to flow through the gap before it can be combined with the cooling air flowing out of the circumferential cooling air waist pipe 4 and exchange heat, avoiding the cooling air flowing out of the circumferential cooling air waist pipe 4 acting on the oil injection end of the oil gun 5, thereby avoiding affecting the ignition of the oil mist.

[0065] In the above embodiment, the gap can be selected by those skilled in the art according to actual needs.

[0066] Optionally, referring to Figures 3 to 5 , the circumferential cooling air waist pipe 4 is connected with a guide pipe 43 through a connecting pipe 44, the guide pipe 43 is located in the combustion chamber 11; the guide pipe 43 extends away from the first end 12 along the first direction A; one end of the connecting pipe 44 is connected with the guide pipe 43, and the other end of the connecting pipe 44 is sleeved outside the circumferential cooling air waist pipe 4.

[0067] In the above embodiment, referring to Figures 3 to 5 , since the circumferential cooling air waist pipe 4 is connected with the guide pipe 43 through the connecting pipe 44, and the guide pipe 43 extends away from the first end 12 along the first direction A, after the cooling air in the circumferential cooling air waist pipe 4 is discharged through the guide pipe 43, it enters the combustion chamber 11 along the first direction A, and its flow direction is substantially the same as that of the fluidized air, so as to avoid interfering with the flow direction of the fluidized air; and entering along the first direction A can make the cooling air entering the combustion chamber 11 closer to the side wall of the combustion chamber 1, thereby improving the cooling effect on the side wall of the combustion chamber 1.

[0068] Specifically, the guide pipe 43 and the connecting pipe 44 can be circular pipes or other shapes, which can be selected by those skilled in the art according to actual needs.

[0069] Optionally, with reference to Figure 1 、 Figure 3 , the side wall of the combustion chamber 1 is provided with an air outlet 14 near the second end 13, the air outlet 14 is in communication with the interlayer channel 3, and the air outlet 14 is used to discharge the cooling air in the interlayer channel 3; the air outlet amount of the air outlet 14 is less than the air outlet amount of the circumferential cooling air waist pipe 4.

[0070] In the above embodiment, with reference to Figure 1 、 Figure 3 , since the side wall of the combustion chamber 1 is provided with the air outlet 14 near the second end 13, the air outlet 14 is in communication with the interlayer channel 3, so that the air outlet 14 can discharge the cooling air in the interlayer channel 3. Since the second end 13 of the combustion chamber 1 is connected with the hearth 9 of the circulating fluidized bed boiler, the cooling air in the interlayer channel 3 is mixed with the fluidized air in the combustion cavity 11 after passing through the air outlet 14, and then enters the hearth 9 together, so as to avoid that the temperature in the hearth 9 is too high to damage the circulating fluidized bed boiler. Since the air outlet amount of the air outlet 14 is less than the air outlet amount of the circumferential cooling air waist pipe 4, most of the cooling air in the interlayer channel 3 enters the combustion cavity 11, which helps to reduce the temperature of the side wall of the combustion chamber 1; at the same time, the remaining small part of the cooling air in the interlayer channel 3 enters the hearth 9, which avoids that the cooling air in the combustion cavity 11 is excessive to cause that the temperature in the combustion cavity 11 is too low, so as to avoid that the oil mist is not fully combusted or cannot be ignited; the fluidized air, the fluidized air entering the combustion cavity 11, and the cooling air flowing out of the air outlet 14 are mixed in the hearth 9 to obtain air with a suitable temperature, which heats the furnace charge in the hearth 9 while avoiding damage to the circulating fluidized bed boiler.

[0071] In the above embodiment, the shape of the air outlet 14 can be a circular hole, an elliptical hole or other shapes, which is not limited in the embodiment of the application. The air outlet 14 can be multiple, and the multiple air outlets 14 can be uniformly distributed along the circumference of the side wall of the combustion chamber 1, so that the cooling air in the interlayer channel 3 can flow out uniformly.

[0072] Optionally, the ratio of the air outlet amount of the circumferential cooling air waist pipe 4 to the air outlet amount of the air outlet 14 is a target ratio K, and the target ratio K ranges from 1.8 to 2.2.

[0073] In the above embodiment, if the target ratio K is less than 1.8, the cooling air flow rate into the combustion chamber 11 is too small, which results in a too high temperature in the combustion chamber 11, and a too high temperature of the side wall of the combustion chamber 1, which easily causes the side wall to be red, deformed or cracked. If the target ratio K is greater than 2.2, the cooling air flow rate into the combustion chamber 11 is too large, which results in a too low temperature in the combustion chamber 11, and a too low temperature in the combustion chamber 11 when the oil mist sprayed by the oil gun 5 is ignited or shortly after the ignition, which can cause the oil mist to be difficult to ignite or difficult to fully burn. When the ratio of the air flow rate of the peripheral cooling air waist pipe 4 to the air flow rate of the air outlet 14 is in the range of 1.8-2.2, the temperature in the combustion chamber 11 is in an appropriate range, so that neither the ignition nor the full combustion of the oil mist is affected, and the temperature of the side wall of the combustion chamber 1 is also not too high to be red.

[0074] The inventor of the present application has tested the target ratio K to be different values, and measured the first temperature T1 of the side wall at the middle position of the combustion chamber 1 in the first direction A when the oil mist is ignited for 30 minutes, and measured the second temperature T2 near the oil injection end of the oil gun 5 in the combustion chamber 11 when the oil mist is ignited for 2 minutes. Table 1 shows the statistical results of the first temperature T1 and the second temperature T2 corresponding to the target ratio K at different values.

[0075] Table 1

[0076]

[0077] From the statistical results in Table 1, when the target ratio K is less than 1.8, the first temperature T1 is greater than 994℃ when the oil mist is ignited for 30 minutes, which causes the temperature of the side wall of the combustion chamber 1 to be too high, and the side wall is easily red. When the target ratio K is in the range of 1.8-2.2, the first temperature T1 is in the range of 807℃-994℃ when the oil mist is ignited for 30 minutes, which is within the temperature range that the side wall of the combustion chamber 1 can withstand, and the second temperature T2 is in the range of 67℃-102℃ when the oil mist is ignited for 2 minutes, which makes the oil mist easy to ignite and relatively fully burn. When the target ratio K is greater than 2.2, the second temperature T2 is less than 67℃, which causes the oil mist to be difficult to ignite or easy to be insufficiently burned. In summary, when the target ratio K is in the range of 1.8-2.2, the ignition of the oil mist and the full combustion of the oil mist can be better balanced, and the side wall of the combustion chamber 1 can be protected from being damaged.

[0078] Optionally, with reference to Figure 2 , the oil injection end of the oil gun 5 is provided with a nozzle, and the atomizing angle a of the nozzle is in the range of 45°-60°.

[0079] In the above embodiment, with reference to Figure 3When the atomization angle a of the nozzle is too large, the oil mist sprayed by the nozzle is easy to spray onto the side wall of the combustion chamber 1, and the combustion of the oil mist causes the temperature of the side wall of the combustion chamber 1 to rise, thereby easily exacerbating the problem of redness and deformation of the side wall of the combustion chamber 1. When the atomization angle a of the nozzle is too small, the oil mist sprayed by the nozzle is not within the ignition range of the ignition gun 8, thereby causing ignition failure. The inventors of the present application have found through experiments that, for the gasification furnace ignition burner in the embodiments of the present application, when the atomization angle a of the nozzle ranges from 45° to 60°, the oil mist sprayed by the nozzle is not easy to spray onto the side wall of the combustion chamber 1, and ignition failure is not easy to occur.

[0080] The atomization angle is also known as the atomization cone angle, which is a core parameter in the field of mechanical engineering for describing the atomization characteristics of a nozzle. The atomization angle is defined as the cone diffusion angle formed by the spray flow at the outlet of the nozzle, that is, the included angle formed by the tangent of the atomization boundary at the outlet of the nozzle or the outer envelope line of the spray.

[0081] Specifically, when the size of the combustion chamber 1 is different, the suitable atomization angle of the nozzle is different, and those skilled in the art can select within the range of 45° to 60° according to actual needs.

[0082] Optionally, with reference to Figure 3 , Figure 4 , the side wall of the combustion chamber 1 comprises a second shell 15 and a cast layer 16 arranged in layers, and the cast layer 16 is sleeved in the second shell 15; the circumferential cooling air waist pipe 4 penetrates through the second shell 15 and the cast layer 16.

[0083] In the above embodiment, since the side wall of the combustion chamber 1 comprises a second shell 15 and a cast layer 16 arranged in layers, and the cast layer 16 is sleeved in the second shell 15; the circumferential cooling air waist pipe 4 penetrates through the side wall of the combustion chamber 1, thereby connecting the interlayer channel 3 and the combustion cavity 11, so that the cooling air in the interlayer channel 3 can flow along the surface of the second shell 15 to reduce the temperature of the second shell 15; the cooling air enters the combustion cavity 11 through the circumferential cooling air waist pipe 4 to reduce the temperature in the combustion cavity 11, thereby reducing the temperature of the cast layer 16; by reducing the temperature of the second shell 15 and the cast layer 16, the problem of redness, deformation or even cracking and falling off of the side wall of the combustion chamber 1 is avoided.

[0084] In the above embodiment, with reference to Figure 3 , the second shell 15 can be made of a metal material, and the cast layer 16 can be formed by mixing high bauxite, corundum, silicon carbide and other materials into cast material and then cast on site. The second shell 15 can be provided with anchor nails 151, which are embedded in the cast layer 16 when the cast material is cast on site. The second shell 15 and the cast layer 16 are conventional technologies in the art, which will not be described here.

[0085] In the above embodiments, with reference to Figure 5 When the fourth end 42 of the peripheral cooling air waist pipe 4 is connected with the guide pipe 43, the guide pipe 43 and the peripheral cooling air waist pipe 4 can be connected through the connecting pipe 44. One end of the connecting pipe 44 is connected with the guide pipe 43, and the other end is sleeved outside the pipe wall of the peripheral cooling air waist pipe 4. The guide pipe 43 and the connecting pipe 44 can also be cast on site by the castable material, and can be integrally cast with the cast layer 16. The guide pipe 43 and the connecting pipe can also be prefabricated by the castable material. Before the cast layer 16 is cast on site, the prefabricated part is sleeved outside the pipe wall of the peripheral cooling air waist pipe 4 and integrally cast with the cast layer 16 on site. It can be understood that the peripheral cooling air waist pipe 4 and the guide pipe 43 can also be connected in other ways.

[0086] Optionally, with reference to Figure 1 The air cooling mechanism 6 comprises a cooling air pipe; the cooling air pipe is in communication with the interlayer channel 3 to introduce cooling air into the interlayer channel 3; the gasification furnace ignition burner further comprises a control unit, the control unit comprises a first temperature sensor, a first air door 61 and a controller; the first temperature sensor is located on the side wall of the combustion chamber 1, the first air door 61 is located on the cooling air pipe, the controller is connected with the first temperature sensor, and the controller is connected with the first air door 61; the controller is used to adjust the opening degree of the first air door 61 according to the temperature collected by the first temperature sensor.

[0087] In the above embodiments, since the controller can adjust the opening degree of the first air door 61 according to the temperature collected by the first temperature sensor, and the first temperature sensor is located on the side wall of the combustion chamber 1 and the first air door 61 is located on the cooling air pipe, the controller can adjust the flow of cooling air introduced into the interlayer channel 3 according to the temperature of the side wall of the combustion chamber 1, and the temperature of the side wall of the combustion chamber 1 can be prevented from being too high.

[0088] In the above embodiments, the first temperature sensor can be a temperature sensor with real-time monitoring function. The temperature range of the side wall of the combustion chamber 1 is a target temperature range. When the first temperature sensor detects that the temperature of the side wall of the combustion chamber 1 exceeds the target temperature range, the sensor sends a signal to the first air door 61 to adjust the opening degree of the first air door 61, so as to adjust the flow of the cooling air pipe and further adjust the flow of the cooling air introduced into the interlayer channel 3. The controller, the first air door 61, are conventional settings in the art, which will not be described here.

[0089] Optionally, with reference to Figure 1The circulating fluidized bed boiler has a furnace 9 connected with the gasification furnace ignition burner used for starting the circulating fluidized bed boiler; the circulating fluidized bed boiler is provided with a cold primary air mechanism; the air cooling mechanism 6 further comprises a combustion-supporting air pipe in communication with the combustion chamber 11; the cold primary air mechanism is connected with the air cooling mechanism 6 to pass cold air into the interlayer passage 3 through the cooling air pipe and pass combustion-supporting air into the combustion chamber 11 through the combustion-supporting air pipe.

[0090] Exemplarily, the cold primary air mechanism passes cold air into the interlayer passage 3 through the cooling air pipe and passes combustion-supporting air into the combustion chamber 11 through the combustion-supporting air pipe, so that the introduction of an additional air source can be avoided, the structure of the gasification furnace ignition burner is simplified, and energy is saved.

[0091] Specifically, in the technical field of circulating fluidized bed boilers, the primary air refers to air used for conveying fuel into the furnace of the circulating fluidized bed boiler and supporting combustion thereof in the combustion process. The primary air is divided into cold primary air and hot primary air. The heated hot air is partly sent into a coal mill for drying and conveying pulverized coal, and is referred to as hot primary air. The hot primary air is used for ensuring that the pulverized coal has a certain temperature when entering the circulating fluidized bed boiler, so as to improve energy utilization rate. The cold primary air is used for adjusting the temperature of the hot primary air, so as to ensure that the heat exchange rate effect reaches the maximum. The cold primary air mechanism refers to an air supply mechanism used for conveying cold primary air into the furnace of the circulating fluidized bed boiler. The cold primary air and the cold primary air mechanism are both common technical means for those skilled in the art, and will not be described herein.

[0092] In the above embodiment, with reference to Figure 1 The combustion-supporting air pipe can further be provided with a second air door 62. By adjusting the opening degree of the second air door 62, the flow of the combustion-supporting air into the combustion chamber 11 can be adjusted.

[0093] In the embodiment, the first shell 2 is arranged outside the side wall of the combustion chamber 1 at intervals, so that the interlayer passage 3 is formed between the side wall of the combustion chamber 1 and the first shell 2, the interlayer passage 3 is communicated with the air cooling mechanism 6, and the cooling air is passed into the interlayer passage 3, so as to cool the side wall of the combustion chamber 1 and avoid redness, deformation or even cracking and falling of the side wall of the combustion chamber 1. The circumferential cooling air waist pipe 4 penetrates through the side wall of the combustion chamber 1, so that the combustion chamber 11 and the interlayer passage 3 can be communicated, the cooling air in the interlayer passage 3 can be branched into the combustion chamber 11, the temperature of the fluidized air flowing in the combustion chamber 1 is reduced, and the problem of redness, deformation or even cracking and falling of the side wall of the combustion chamber 1 is avoided. By uniformly arranging a plurality of circumferential cooling air waist pipes 4 along the circumference of the combustion chamber 1, the cooling air in the interlayer passage 3 can be uniformly introduced into the combustion chamber 11, so that the temperature of the side wall of the combustion chamber 1 is more uniform along the circumference of the combustion chamber 1, and the deformation of the side wall of the combustion chamber 1 due to uneven temperature is avoided.

[0094] In the description of the application, reference has been made to descriptive terms such as "some embodiments", "other embodiments", "exemplarily", "specifically", or "some examples" etc. It is intended that individual features, structures, materials or characteristics described in relation to any one of the embodiments or examples should not be limited to that embodiment or example only. The fact that separate embodiments or examples have been described in relation to any individual feature, structure, material or characteristic does not prevent that individual feature, structure, material or characteristic from also being in combination with one or more features, structures, materials or characteristics described in relation to any other embodiment or example. The illustrative description of the above terms does not necessarily indicate that the terms refer to the same embodiment or example. Moreover, the individual features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0095] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A gasifier ignition burner, characterized in that: include: A combustion chamber (1), wherein a combustion chamber (11) is provided in the combustion chamber (1); A first shell (2), the first shell (2) being sleeved outside the side wall of the combustion chamber (1) and spaced apart from the side wall to form an interlayer channel (3); A peripheral cooling air waist pipe (4), the peripheral cooling air waist pipe (4) passing through the side wall of the combustion chamber (1) to connect the combustion cavity (11) and the interlayer channel (3); An air cooling mechanism (6), the air cooling mechanism (6) being in communication with the interlayer channel (3) so as to introduce cooling air into the interlayer channel (3); There are a plurality of circumferential cooling air waist tubes (4), and the plurality of circumferential cooling air waist tubes (4) are evenly distributed along the circumference of the combustion chamber (1). The circumferential cooling air waist tubes (4) are used to divert the cooling air in the interlayer channel (3) to the combustion chamber (11).

2. The gasifier ignition burner according to claim 1, characterized in that: The combustion chamber (1) has a first end (12) and a second end (13) arranged in opposite directions along a first direction; The gasifier ignition burner further comprises an oil gun (5), an ignition gun (8) and a propeller (7), wherein the oil spray end of the oil gun (5) extends from the first end (12) into the combustion chamber (11), the ignition end of the ignition gun (8) is movably inserted into the first end (12), and the ignition end of the ignition gun (8) is close to the oil spray end of the oil gun (5) to ignite the oil mist sprayed from the oil spray end of the oil gun (5); The circumferential cooling air waist pipe (4) has a third end (41) and a fourth end (42) that are arranged in a manner opposite to each other, the third end (41) is in communication with the interlayer channel (3), and the fourth end (42) is in communication with the combustion chamber (11); The circumferential cooling air waist pipe (4) is arranged obliquely relative to the side wall of the combustion chamber (1), and the fourth end (42) extends in a direction away from the first end (12).

3. The gasifier ignition burner according to claim 2, characterized in that: Along the first direction, the distance between the fourth end (42) and the first end (12) is a first distance, and the distance between the fourth end (42) and the second end (13) is a second distance, and the first distance is smaller than the second distance.

4. The gasifier ignition burner according to claim 3, characterized in that: Along the first direction, the fourth end (42) of the circumferential cooling air waist pipe (4) is spaced from the oil spraying end of the oil gun (5), and the fourth end (42) is located on the side of the oil spraying end of the oil gun (5) facing the second end (13).

5. The gasifier ignition burner according to claim 2, characterized in that: The peripheral cooling air waist pipe (4) is connected to a guide pipe (43) via a connecting pipe (44), and the guide pipe (43) is located in the combustion chamber (11); The guide tube (43) extends along the first direction away from the first end (12); One end of the connecting pipe (44) is connected to the guide pipe (43), and the other end is sleeved outside the peripheral cooling air waist pipe (4).

6. The gasifier ignition burner according to claim 2, characterized in that: An air outlet (14) is provided on the side wall of the combustion chamber (1) near the second end (13), the air outlet (14) being in communication with the interlayer channel (3), and the air outlet (14) being used to discharge cooling air in the interlayer channel (3); The air output of the air outlet (14) is smaller than the air output of the peripheral cooling air waist pipe (4).

7. The gasifier ignition burner according to claim 6, characterized in that: The ratio of the air volume of the peripheral cooling air waist pipe (4) to the air volume of the air outlet (14) is a target ratio, and the range of the target ratio is 1.8-2.

2.

8. The gasifier ignition burner according to claim 2, characterized in that: The oil spraying end of the oil gun (5) is provided with a nozzle, and the atomization angle of the nozzle is in the range of 45°-60°.

9. The gasifier ignition burner according to claim 1, characterized in that: The side wall of the combustion chamber (1) comprises a second shell (15) and a casting layer (16) which are stacked, and the casting layer (16) is sleeved inside the second shell (15); The peripheral cooling air waist pipe (4) passes through the second shell (15) and the casting layer (16).

10. The gasifier ignition burner according to claim 1, characterized in that: The air cooling mechanism (6) comprises a cooling air duct; The cooling air duct is in communication with the interlayer channel (3) so as to introduce cooling air into the interlayer channel (3); The gasifier ignition burner further comprises a control unit, which comprises a first temperature sensor, a first air door (61) and a controller; The first temperature sensor is located on a side wall of the combustion chamber (1), the first damper (61) is located on the cooling air duct, the controller is connected to the first temperature sensor, and the controller is connected to the first damper (61); The controller is used to adjust the opening of the first damper (61) according to the temperature collected by the first temperature sensor.

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