Boiler combustion system for optimizing four-corner tangential combustion mode

Abstract

According to the boiler combustion system for optimizing the four-corner tangential combustion mode, the combustor nozzle adjusting device adopts a mechanical sliding mode, the adjusting device can be manually adjusted on site and can also be controlled by an automatic system, the direction of the combustor nozzle is easy to observe, a boiler can be conveniently adjusted in the operation process, and the boiler combustion efficiency is improved. And the adaptability of the coal-fired boiler during operation is improved. Technicians in the field can adaptively adjust the position and the angle of the burner according to actual operation conditions, so that the temperature of a water cooling wall and the temperature in a hearth are stable, and the safety and the stability of a boiler are further guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of boiler combustion, and in particular relates to a boiler combustion system which optimizes a four-corner tangential circle combustion mode. Background Art

[0002] Conventional coal-fired boilers currently use a tangential combustion method, where the burner nozzle can swing up and down. The size and position of the tangential circle are typically determined based on boiler capacity, coal composition, furnace size, and design experience. Once fixed, the burner nozzle cannot move laterally.

[0003] In the existing technology, when the coal type or combustion conditions change, the boiler operation cannot adapt accurately, and the size of the four-corner tangential combustion will change, resulting in problems such as water-cooled wall overheating, coking, and large temperature deviations in the furnace, affecting the safe and stable operation of the boiler. Utility Model Content

[0004] The purpose of this utility model is to provide a boiler combustion system that optimizes the four-corner tangential combustion method to solve the problem that coal-fired boilers in the prior art have poor adaptability during operation, which easily leads to water-cooled wall overheating, coking and large temperature deviation in the furnace, thereby affecting the safety and stability of the boiler.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A boiler combustion system for optimizing a four-corner tangential combustion method includes a furnace, wherein the furnace is a quadrangular prism-like structure, and the areas at the four corners of the furnace are connecting surfaces, each connecting surface being connected to a combustion device;

[0007] The combustion device includes a fixing frame, the side wall of the fixing frame contacting the connection surface is a connecting plate, a plurality of spray holes are vertically opened on the side wall of the connecting plate, and a through hole corresponding to the plurality of spray holes is opened on the connection surface;

[0008] A burner is provided inside the fixing frame, the nozzle of the burner can enter the corresponding nozzle hole and the central axis of each burner nozzle is tangent to the central circle of the furnace;

[0009] A side plate of the fixing frame adjacent to the connecting plate is a fixing plate, and a first guide groove extending longitudinally and corresponding to the height of the plurality of through holes is provided on the inner wall of the fixing plate; a second guide groove is provided at the bottom of the top plate of the fixing frame, and the second guide groove is an "L"-shaped guide groove extending in both the horizontal and vertical directions;

[0010] The burner is arranged inside the fixed frame through a connecting piece, and the connecting piece includes a longitudinal connecting rod and a vertical connecting rod;

[0011] The longitudinal connecting rod is connected to the burner, and the end of the longitudinal connecting rod can enter the first guide groove and move along the first guide groove;

[0012] The vertical connecting rod is a telescopic rod, the lower end of the vertical connecting rod is fixedly connected to the longitudinal connecting rod, and the upper part of the vertical connecting rod can enter the second guide groove and move along the second guide groove.

[0013] The utility model also has the following features:

[0014] Furthermore, a connecting sleeve is provided on the longitudinal connecting rod;

[0015] The longitudinal connecting rod is provided with a thread structure, and the inner wall of the connecting sleeve is provided with an internal thread corresponding to the thread structure; the longitudinal connecting rod is threadedly connected to the connecting sleeve through its own thread structure;

[0016] The burner is connected to the longitudinal connecting rod through a connecting sleeve.

[0017] Furthermore, the end of the longitudinal connecting rod is connected to a roller; the end of the longitudinal connecting rod can roll into the first guide groove through the roller;

[0018] The top end of the vertical connecting rod is connected with a ball, and the upper part of the vertical connecting rod can roll into the second guide groove through the ball.

[0019] Furthermore, the invention also includes direction sensors having the same number as the burners;

[0020] The direction sensors are arranged on the burners in a one-to-one correspondence.

[0021] Furthermore, it also includes a controller; the controller is connected to the external power device and all direction sensors respectively.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] This utility model optimizes the four-corner tangential combustion method of the boiler combustion system. The burner nozzle adjustment device adopts a mechanical sliding form. The adjustment device can be manually adjusted on site or controlled by an automated system. The direction of the burner nozzle is easy to observe, which facilitates the adjustment of the boiler during operation and improves the adaptability of coal-fired boiler operation. Those skilled in the art can adaptively adjust the burner position and angle according to actual operating conditions to ensure the stability of the water wall temperature and the air temperature in the furnace, thereby ensuring the safety and stability of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a boiler combustion system of the utility model that optimizes the four-corner tangential combustion mode;

[0025] Figure 2 This is a schematic diagram of the explosion structure in which the combustion device is connected to the fixing frame in the utility model;

[0026] Figure 3 It is a schematic diagram of the connection structure between the connector and the burner in the utility model.

[0027] The meanings of the numbers in the figure are: 1. furnace; 2. connecting surface; 3. fixing frame; 4. nozzle; 5. burner; 6. fixing plate; 7. top plate; 8. longitudinal connecting rod; 9. vertical connecting rod; 10. connecting sleeve; 11. controller. DETAILED DESCRIPTION

[0028] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the burner is a known and commonly used burner.

[0029] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the scope of protection of the present invention.

[0030] A boiler combustion system that optimizes the four-corner tangential combustion method, such as Figure 1 As shown, the furnace 1 includes a furnace 1, which is a quadrangular prism-like structure. The areas at the four corners of the furnace 1 are connecting surfaces 2, and each connecting surface 2 is connected to a group of combustion devices;

[0031] like Figure 2 As shown, the combustion device includes a fixing frame 3, the side wall of the fixing frame 3 close to the connecting surface 2 is a connecting plate, a plurality of nozzle holes 4 are vertically opened on the side wall of the connecting plate, and a through hole corresponding to the plurality of nozzle holes 4 is opened on the connecting surface 2;

[0032] A burner 5 is provided inside the fixed frame 3. The nozzle of the burner 5 can enter the corresponding nozzle hole 4 and the central axis of the nozzle of each burner 5 is tangent to the central circle of the furnace 1.

[0033] The side plate of the fixed frame 3 close to the connecting plate is a fixed plate 6, and the inner wall of the fixed plate 6 is provided with a first guide groove extending in the longitudinal direction corresponding to the multiple through holes; the bottom of the top plate 7 of the fixed frame 3 is provided with a second guide groove; the second guide groove is an "L"-shaped guide groove extending in both the horizontal and vertical directions;

[0034] The burner 5 is arranged inside the fixed frame 3 through a connecting piece, and the connecting piece includes a longitudinal connecting rod 8 and a vertical connecting rod 9;

[0035] The longitudinal connecting rod 8 can be connected to the burner 5, and the end of the longitudinal connecting rod 8 can enter the first guide groove and move along the first guide groove;

[0036] The vertical connecting rod 9 is a telescopic rod, the lower end of the vertical connecting rod 9 is fixedly connected to the longitudinal connecting rod 8, and the upper part of the vertical connecting rod 9 can enter the second guide groove and move along the second guide groove.

[0037] When the device is in use, the longitudinal connection rod 8 enables the burner 5 to move longitudinally. When vertical movement is required, the vertical connection rod 9 is first moved within the second guide groove, allowing the longitudinal connection rod 8 to escape from the current first guide groove. The expansion and contraction of the vertical connection rod 9 then drives the burner 5 to achieve vertical movement. This arrangement enables the nozzle of the burner 5 to enter different nozzle holes 4 for operation according to actual needs.

[0038] This device can be manually adjusted on site or controlled by an automated system, which can understand the direction of the burner nozzle, facilitate the adjustment of the boiler during operation, and improve the adaptability of the coal-fired boiler during operation. It is easy for technical personnel in this field to adaptively adjust the burner position and angle according to actual operating conditions to ensure the stability of the water-cooled wall temperature and the air temperature in the furnace, thereby ensuring the safety and stability of the boiler.

[0039] As a preferred solution, Figure 3 As shown, a connecting sleeve 10 is detachably provided on the longitudinal connecting rod 8;

[0040] The longitudinal connecting rod 8 is provided with a thread structure, and the inner wall of the connecting sleeve 10 is provided with an internal thread corresponding to the thread structure; the longitudinal connecting rod 8 is screwed to the connecting sleeve 10 through its own thread structure;

[0041] The burner 5 is connected to the longitudinal connecting rod 8 via a connecting sleeve 10 .

[0042] The burner 5 is connected to the connecting sleeve 10, and the relative positions of the longitudinal connecting rod 8 and the connecting sleeve 10 can be manually adjusted to change the up and down and left and right inclination angles of the burner 5. In this way, the time for the secondary air to mix with the primary air powder can be adjusted, and the ignition and combustion conditions of the coal powder airflow can be improved to adapt to changes in the type of coal; in addition, the center position of the flame and the flue gas temperature at the furnace outlet can be adjusted to further prevent problems such as water-cooled wall overheating, coking and large temperature deviation in the furnace.

[0043] Specifically, the end of the longitudinal connecting rod 8 is connected to a roller; the end of the longitudinal connecting rod 8 can roll into the first guide groove through the roller;

[0044] The top end of the vertical connecting rod 9 is connected to a ball, and the upper portion of the vertical connecting rod 9 can roll into the second guide groove through the ball.

[0045] As a preferred solution, the longitudinal connecting rod 8 and the vertical connecting rod 9 are respectively connected to an external power device. The external power device controls the movement of the longitudinal connecting rod 8 and the vertical connecting rod 9, thereby changing the position of the burner 5.

[0046] As a preferred solution, it also includes direction sensors with the same number as the burners 5;

[0047] The direction sensors are arranged on the burners 5 in a one-to-one correspondence.

[0048] Further preferably, the controller 11 is connected to the external power device and all direction sensors respectively; the direction sensor detects the deflection direction of the corresponding burner 5 nozzle, and then measures the lateral deflection angle θ and longitudinal deflection angle α of the burner 5 nozzle and transmits the detection results to the controller.

[0049] The adjustment range of the lateral deflection angle θ is 0-20°, and the adjustment range of the longitudinal deflection angle α is 0-10°.

[0050] It should be noted that the controller 11 , the external power device and all the direction sensors are all known existing devices, and the signal transmission between the components also adopts known existing methods.

[0051] For boiler systems with burners arranged in a four-corner tangential circular arrangement, long-term operation and fluctuating combustion conditions can cause the deflection angles of burner nozzles on the same layer to deviate from the set value. This causes flue gas to deviate to one side, rather than being centered, leading to temperature deviations and corrosion of the heated surfaces. In actual applications, the lateral deflection angle θ and longitudinal deflection angle α of the burner nozzles 5 are measured based on temperature data obtained from temperature measurement points and the detection and controller 11. The test results are sent to the controller 11, and technicians skilled in the art can make corrections based on the burner nozzle orientation required under actual operating conditions, ultimately achieving a stable tangential circle center and consistent temperature.

[0052] According to the detection results, those skilled in the art can manually control the burner nozzle adjustment device to adjust the direction of the burner 5 nozzle to optimize the combustion conditions in the furnace 1.

Claims

1. A boiler combustion system that optimizes the four-corner tangential combustion method, characterized in that: The furnace (1) comprises a furnace (1), wherein the furnace (1) is a quadrangular prism-like structure, the areas at the four corners of the furnace (1) are connecting surfaces (2), and each connecting surface (2) is connected to a combustion device; The combustion device comprises a fixing frame (3), a side wall of the fixing frame (3) contacting the connection surface (2) being a connection plate, a plurality of spray holes (4) being vertically provided on the side wall of the connection plate, and a through hole corresponding to the plurality of spray holes (4) being provided on the connection surface (2); A burner (5) is provided inside the fixing frame (3), the nozzle of the burner (5) can enter the corresponding nozzle hole (4), and the central axis of the nozzle of each burner (5) is tangent to the central circle of the furnace (1); A side plate of the fixing frame (3) adjacent to the connecting plate is a fixing plate (6), and a first guide groove extending in the longitudinal direction and corresponding to the height of the plurality of through holes is provided on the inner wall of the fixing plate (6); a second guide groove is provided at the bottom of the top plate (7) of the fixing frame (3), and the second guide groove is an "L"-shaped guide groove extending in both the horizontal and vertical directions; The burner (5) is arranged inside the fixed frame (3) through a connecting piece, and the connecting piece includes a longitudinal connecting rod (8) and a vertical connecting rod (9); The longitudinal connecting rod (8) is connected to the burner (5), and the end of the longitudinal connecting rod (8) can enter the first guide groove and move along the first guide groove; The vertical connecting rod (9) is a telescopic rod, the lower end of the vertical connecting rod (9) is fixedly connected to the longitudinal connecting rod (8), and the upper part of the vertical connecting rod (9) can enter the second guide groove and move along the second guide groove.

2. The boiler combustion system with optimized tangential combustion method according to claim 1, characterized in that: The longitudinal connecting rod (8) is provided with a connecting sleeve (10); The longitudinal connecting rod (8) is provided with a thread structure, and the inner wall of the connecting sleeve (10) is provided with an internal thread corresponding to the thread structure; the longitudinal connecting rod (8) is threadedly connected to the connecting sleeve (10) through its own thread structure; The burner (5) is connected to the longitudinal connecting rod (8) via a connecting sleeve (10).

3. The boiler combustion system with optimized tangential combustion method according to claim 1, characterized in that: The end of the longitudinal connecting rod (8) is connected to a roller; the end of the longitudinal connecting rod (8) can roll into the first guide groove through the roller; The top end of the vertical connecting rod (9) is connected to a ball bearing, and the upper portion of the vertical connecting rod (9) can roll into the second guide groove through the ball bearing.

4. The boiler combustion system with optimized tangential combustion method according to claim 1, characterized in that: The longitudinal connecting rod (8) and the vertical connecting rod (9) are respectively connected to an external power device.

5. The boiler combustion system with optimized tangential combustion method according to claim 1, characterized in that: Also includes direction sensors having the same number as the burners (5); The direction sensors are arranged on the burners (5) in a one-to-one correspondence.

6. The boiler combustion system with optimized tangential combustion method according to claim 1, characterized in that: Also includes a controller (11); The controller (11) is connected to the external power device and all direction sensors respectively.

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