Hybrid circulating fluidized bed boiler

Abstract

The present application discloses a mixed circulating fluidized bed boiler, which relates to the field of boilers; the present application includes a boiler body, which has a combustion chamber therein; a feed pipe with an opening at one end, which passes through and is connected to the boiler body and whose open end extends into the combustion chamber, wherein the inner bottom wall of the feed pipe at one end located in the combustion chamber is provided with a first discharge port, and the top of the feed pipe at one end located outside the boiler body is provided with a second discharge port; the present application arranges a feed pipe and a feed box slidably arranged therein, utilizes the interlacing of the port of the guide pipe and the second discharge port, the interlacing of the port of the feed box and the first discharge port, and the blocking or unblocking of the port of the feed box by the lower sealing plate, so that after each feeding, the feed channel is blocked, and heat overflow and loss will not be caused. At the same time, flue gas can only enter the inner wall of the feed pipe opening. As the feed box slides back and forth, the feed box will scrape the inner wall of the feed pipe without causing blockage, thereby improving practicality.

Description

Technical Field

[0001] The present application relates to the technical field of boilers, and in particular to a mixed circulating fluidized bed boiler. Background Art

[0002] A fluidized bed boiler is a boiler that uses a fluidized bed combustion method. Fluidized bed boilers can be divided into bubbling fluidized bed boilers and circulating fluidized bed boilers according to the fluid dynamic characteristics. Fluidized bed boilers can be divided into atmospheric fluidized bed boilers and pressurized fluidized bed boilers according to the flue gas pressure in the furnace. Circulating fluidized bed boiler desulfurization is an in-furnace combustion desulfurization process. Limestone is used as the desulfurization absorbent. Coal and limestone are fed into the boiler combustion chamber. The limestone is heated and decomposed into calcium oxide and carbon dioxide. The airflow causes the coal and lime particles to be strongly disturbed in the combustion chamber to form a fluidized bed. The sulfur dioxide in the coal-fired flue gas contacts the calcium oxide to undergo a chemical reaction and is removed. In order to improve the utilization rate of the absorbent, the unreacted calcium oxide, desulfurization products and fly ash are returned to the combustion chamber for recycling.

[0003] When the existing fluidized bed boiler is being loaded, since the storage hopper is connected to the loading pipe, the heat and unburned particles in the fluidized bed boiler are easily caused to overflow with the flue gas during the discharge process, which not only causes heat loss, but also the flue gas burned in the boiler will adhere to the loading pipe. After long-term use, the flue gas and impurities will adhere and form scabs, which can easily cause blockage of the loading pipe. Therefore, the present application proposes a hybrid circulating fluidized bed boiler. Summary of the Invention

[0004] The purpose of this application is to solve the problem that in the existing boiler, heat and unburned particles in the boiler are easily overflowed with the flue gas during the discharge process, which not only causes heat loss, but also the flue gas burned in the boiler will adhere to the feeding pipe and easily cause blockage of the feeding pipe. This application provides a hybrid circulating fluidized bed boiler.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] Hybrid circulating fluidized bed boiler, including:

[0007] a boiler body having a combustion chamber therein;

[0008] A feed pipe with an opening at one end is connected to the boiler body and extends into the combustion chamber. A first discharge port is formed through the inner bottom wall of the end of the feed pipe located in the combustion chamber, and a second discharge port is formed through the top of the end of the feed pipe located outside the boiler body.

[0009] A storage hopper is provided on the boiler body, wherein the discharge end of the storage hopper is connected to the second discharge port via a discharge pipe, and a discharge mechanism is provided on the discharge pipe;

[0010] A feeding box with an opening at the bottom is slidably arranged in the feeding tube, one side of the feeding box is connected to a material guide tube, a partition is provided in the feeding box and above the communicating port of the material guide tube, a guide rod is slidably passed through the partition, and the upper and lower ends of the guide rod are respectively connected to an upper support plate and a lower sealing plate that slide in the feeding box, and an adjusting member for adjusting the sliding of the guide rod is provided in the feeding tube;

[0011] The driving mechanism is arranged on the boiler body and is used for driving the feeding box to slide back and forth along the feeding pipe.

[0012] Furthermore, the adjusting member includes:

[0013] Two guide grooves are respectively provided on opposite sides of the inner wall of the feeding pipe, and the guide grooves have a first transverse groove, an oblique groove and a second transverse groove which are connected to each other;

[0014] The guide rod is arranged on the upper support plate, and a through groove is opened on the opposite side of the inner wall of the feeding box and above the partition. The two ends of the guide rod slide through the two through grooves and are slidably inserted in the two guide grooves.

[0015] Furthermore, a spring is connected between the upper support plate and the inner top wall of the feeding box.

[0016] Furthermore, bearing wheels are respectively sleeved on both ends of the guide rod, and the two bearing wheels are respectively inserted and rolled in the two guide grooves.

[0017] Furthermore, the driving mechanism includes:

[0018] A bracket is provided on the boiler body, a screw rod is rotatably provided on the bracket, and one end of the screw rod is connected to a motor provided on the bracket;

[0019] The first connecting rod is U-shaped, with one end threadedly sleeved on the screw rod and the other end movably passing through the closed end of the feeding tube and connected to the feeding box.

[0020] Furthermore, the discharge mechanism includes:

[0021] A material control plate, wherein opposite sides of the inner wall of the discharge pipe are penetrated with through grooves, the material control plate slides through the two through grooves, and one end of the material control plate is penetrated with a material passing groove;

[0022] The second connecting rod is L-shaped, one end of which is connected to the material control plate, and the other end of which is movable through the closed end of the feeding tube and connected to the feeding box.

[0023] Furthermore, a rotating shaft is rotated through the opposite side of the inner wall of the discharge pipe, and a plurality of shift rods are arranged in an array on the outer surface of the rotating shaft. A linkage is provided between the rotating shaft and the screw rod. When the screw rod rotates, the linkage drives the rotating shaft to rotate synchronously.

[0024] Furthermore, the linkage comprises:

[0025] A rotating rod is rotatably arranged on the bracket;

[0026] Two bevel gears are fixed on the screw rod and the rotating rod respectively, and the teeth of the two are meshed;

[0027] The pulley assembly is connected to the rotating rod and the rotating shaft.

[0028] Furthermore, a blower is provided on the bracket, an air outlet of the blower is connected to the boiler body via an air pipe, and a one-way valve is provided on the air pipe.

[0029] Furthermore, the feed pipe is provided with a guide cylinder connected to the first discharge port, and two bulk material ports are opened through one side of the guide cylinder. The blower has two air outlets, and the number of the air pipes is two. One end of the two air pipes is connected to the two air outlets respectively, and the other ends of the two air pipes are connected to the guide cylinder and correspond one-to-one to the two bulk material ports respectively.

[0030] The beneficial effects of this application are as follows:

[0031] 1. In the present application, by setting up a feeding pipe and a feeding box slidably arranged therein, utilizing the interlacing of the port of the guide pipe and the second discharge port, the interlacing of the port of the feeding box and the first discharge port, and the blocking or unblocking of the port of the feeding box by the lower sealing plate, the feeding channel is blocked each time feeding is performed, and heat overflow and loss will not be caused. At the same time, the smoke can only enter the inner wall of the opening of the feeding pipe. However, with each reciprocating conveying of the feeding box, the feeding box will scrape the inner wall of the feeding pipe, and will not cause blockage, thereby improving practicality.

[0032] 2. In the present application, a guide groove is provided on the inner wall of the feed pipe, and a guide rod that slides with the guide groove is provided on the upper support plate. The guide groove is constructed into a first transverse groove, an oblique groove and a second transverse groove that are connected to each other, so that it becomes a stepped slide groove. When the feed box slides along the feed pipe, it can drive the lower sealing plate to move up and down, which can effectively seal the port of the feed box after unloading, and at the same time does not affect the normal loading of the fuel during loading, thereby improving practicality.

[0033] 3. In the present application, a material control plate is slidably inserted on the discharge pipe, and a material passing trough is opened on the material control plate. When the feed box moves along the feed pipe, the material control plate also slides along the two through grooves. When the port of the guide pipe is connected with the second discharge port, the material passing trough is also connected with the discharge pipe. When the guide pipe is staggered with the second discharge port, the material passing trough is also staggered with the discharge pipe. When the feed box slides back and forth for loading or unloading, the discharge pipe is also discharged or blocked. The two are carried out simultaneously, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural diagram of this application;

[0035] Figure 2 It is a sectional view of the three-dimensional structure of this application;

[0036] Figure 3 This is a three-dimensional structural diagram of the feeding tube of this application;

[0037] Figure 4 This is a sectional view of the three-dimensional structure of the feeding tube of the present application;

[0038] Figure 5 This is another three-dimensional structural cross-sectional view of the feeding tube of the present application;

[0039] Figure 6 This is a three-dimensional structural diagram of the feeding box of this application;

[0040] Figure 7 This is a sectional view of the three-dimensional structure of the feeding box of the present application;

[0041] Figure 8 This application Figure 1 Enlarged view of point A in the middle;

[0042] Figure 9 This application Figure 2 Enlarged view of point B in the middle;

[0043] Figure 10 This application Figure 2 Enlarged view of point C in the middle;

[0044] Reference numerals: 1, boiler body; 2, feed pipe; 3, first discharge port; 4, second discharge port; 5, storage hopper; 6, discharge pipe; 7, discharge mechanism; 8, feed box; 9, guide pipe; 10, partition; 11, guide rod; 12, upper support plate; 13, lower sealing plate; 14, adjustment member; 15, driving mechanism; 16, spring; 17, bearing wheel; 18, rotating shaft; 19, shift lever; 20, linkage member; 21, blower; 22, air pipe; 23, guide cylinder; 2 4. Bulk material outlet; 701. Material control plate; 702. Through slot; 703. Material chute; 704. Second connecting rod; 1401. Guide slot; 1402. Guide rod; 1403. Through slot; 14011. First transverse slot; 14012. Inclined slot; 14013. Second transverse slot; 1501. Bracket; 1502. Screw rod; 1503. Motor; 1504. First connecting rod; 2001. Rotating rod; 2002. Bevel gear; 2003. Pulley assembly. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0046] like Figures 1-10As shown, a mixed circulating fluidized bed boiler proposed in one embodiment of the present application comprises: a boiler body 1, which has a combustion chamber therein; a feed pipe 2 for burning fuel in the combustion chamber, one end of which is an opening, which passes through and is connected to the boiler body 1 and whose open end extends into the combustion chamber, the inner bottom wall of the end of the feed pipe 2 located in the combustion chamber passes through and is provided with a first discharge port 3, and the top of the end of the feed pipe 2 located outside the boiler body 1 passes through and is provided with a second discharge port 4; a storage hopper 5 is arranged on the boiler body 1, and the discharge end of the storage hopper 5 is connected to the second discharge port 4 through a discharge pipe 6, and a discharge mechanism 7 is provided on the discharge pipe 6; the storage hopper 5 is used for placing particulate fuel, and the fuel in the storage hopper 5 can be transported from the discharge pipe 6 to the second discharge port 4 through the discharge mechanism 7, and the bottom of the feed box 8 is an open. Preferably, the bottom of the feed box 8 The opening size is the same as the first discharge port 3, and it is slidably arranged in the feeding tube 2. The outer wall of the feeding box 8 fits the inner wall of the feeding tube 2. One side of the feeding box 8 is connected with a guide tube 9. Preferably, the guide tube 9 is inclined, and the opening size of the free end of the guide tube 9 is the same as the second discharge port 4. A partition 10 is provided in the feeding box 8 and above the communicating port of the guide tube 9. A guide rod 11 slides through the partition 10. The upper and lower ends of the guide rod 11 are respectively connected to an upper support plate 12 and a lower sealing plate 13 that slide in the feeding box 8. Preferably, the outer wall of the lower sealing plate 13 fits the inner wall of the feeding box 8. When the guide rod 11 slides and the upper support plate 12 fits the partition 10, the lower sealing plate 13 is just flush with the open end of the feeding box 8 and blocks its open end. An adjusting member 14 for adjusting the sliding of the guide rod 11 is provided in the feeding tube 2;The driving mechanism 15 is provided on the boiler body 1 and is used to drive the feeding box 8 to slide back and forth along the feeding pipe 2. In actual use, the pellet fuel is placed in the storage hopper 5. When it is necessary to deliver fuel to the combustion chamber in the boiler body 1, the feeding box 8 is driven by the driving mechanism 15 to slide along the feeding pipe 2. When the feeding box 8 slides away from the boiler body 1 and the free end of the guide pipe 9 corresponds to the second discharge port 4, the feeding box 8 stops sliding, and the port of the feeding box 8 is staggered with the first discharge port 3, and it cooperates with the inner bottom wall of the feeding pipe 2 to form a storage space for temporarily storing fuel. The discharge mechanism 7 discharges the fuel in the storage hopper 5, and the fuel slides from the discharge pipe 6 and the second discharge port 4 into the guide pipe 9. Since the guide pipe 9 is tilted, the fuel slides from the guide pipe 9 into the storage space. When the discharge mechanism 7 has discharged a certain amount of fuel, the discharge is stopped (preferably, the fuel is lower than the connecting port of the guide pipe 9 after it is in the storage space). At this time, the guide rod 11 slides downward, and the lower sealing plate 13 overlaps the top of the fuel. The driving mechanism 15 drives the feeding box 8 to slide along the feeding pipe 2 and approach the boiler body 1 again. When the port of the feeding box 8 is close to the first discharge port, the fuel box 8 is opened. When the fuel is fed into the fuel box 8 and the fuel is discharged from the first discharge port 3, the fuel in the storage space is discharged from the port of the fuel box 8 and the first discharge port 3. When the fuel is fed into the fuel box 8 and the fuel is burned, when the port of the fuel box 8 is completely aligned with the first discharge port 3, the fuel in the storage space is completely discharged, and the lower sealing plate 13 is completely moved down without the obstruction of the fuel and blocks the port of the fuel box 8, thereby completing a fuel delivery. When the driving mechanism 15 drives the fuel box 8 to slide back and forth along the feeding pipe 2, a cyclic reciprocating feeding is realized. After the fuel box 8 completes the unloading, the lower sealing plate 13 will immediately block the port of the fuel box 8. Therefore, the fuel in the combustion chamber Flue gas heat and unburned fuel particles do not enter the feed box 8, thus preventing spillage. The staggered arrangement of the port of the guide tube 9 and the second discharge port 4, the staggered arrangement of the port of the feed box 8 and the first discharge port 3, and the blocking of the port of the feed box 8 by the lower sealing plate 13 ensure that the feed channel is sealed during each feeding, preventing heat from spilling out. Furthermore, flue gas can only enter the inner wall of the opening of the feed pipe 2. However, with each reciprocating movement of the feed box 8, the feed box 8 scrapes the inner wall of the feed pipe 2, preventing blockage and thus improving practicality.

[0047] like Figure 5 and Figure 6As shown, in some embodiments, the adjusting member 14 includes: two guide grooves 1401, which are respectively opened on opposite sides of the inner wall of the feeding pipe 2, and the guide groove 1401 has a first transverse groove 14011, an oblique groove 14012 and a second transverse groove 14013 that are connected; preferably, the width of the second transverse groove 14013 is greater than the width of the first transverse groove 14011 and the oblique groove 14012, and the guide rod 1402 is arranged on the upper support plate 12, and a through groove 1403 is penetrated on the opposite side of the inner wall of the feeding box 8 and located above the partition 10, and the two ends of the guide rod 1402 slide through the two through grooves 1403 respectively and are slidably inserted into the two guide grooves 1401 respectively. When the end of the guide pipe 9 corresponds to the second discharge port 4 14, and the fuel is discharged from the feed box 8. When the feed box 8 slides along the feed pipe 2, the guide rod 1402 slides along the first transverse groove 14011. When the port of the feed box 8 is connected with the first discharge port 3, the guide rod 1402 slides into the inclined groove 14012. After the guide rod 1402 enters the inclined groove 14012, it will drive the guide rod 11 to slide through the upper support plate 12, thereby driving the lower sealing plate 13 to move. At this time, the fuel begins to be discharged from the port of the feed box 8 and the first discharge port 3. When the feed box 8 continues to move, the port of the feed box 8 and the first discharge port 3 are connected. 3 gradually increases, the unloading continues, the fuel in the feeding box 8 gradually decreases, so that when the lower sealing plate 13 is gradually affected by the fuel, the guide rod 1402 slides along the inclined groove 14012 into the second transverse groove 14013, and the lower sealing plate 13 gradually moves downward. It should be noted that the distance of the inclined groove 14012 is very short, and the guide rod 1402 quickly slides into the second transverse groove 14013. Since the second transverse groove 14013 has a certain width, when the guide rod 1402 slides into the second transverse groove 14013, the second transverse groove 14013 no longer limits the guide rod 1402, and the lower sealing plate 13 will only move downward in real time according to the reduction of fuel unloading. During actual unloading, as the fuel The lower sealing plate 13 follows up in real time during the unloading. When the fuel is unloaded, the lower sealing plate 13 blocks the port of the feed box 8. After the lower sealing plate 13 blocks the feed box 8 and the feed box 8 slides and resets away from the boiler body 1, at this time, the guide rod 1402 is in the second transverse groove 14013, and the lower sealing plate 13 will not move. Only after the port of the feed box 8 is completely offset from the first discharge port 3, the guide rod 1402 will slide from the second transverse groove 14013 to the inclined groove 14012. When the guide rod 1402 slides along the inclined groove 14012, the lower sealing plate 13 will gradually rise. When the guide rod 1402 is located in the first transverse groove 14011, the lower sealing plate 13 is completely in contact with the partition 10, so as to facilitate loading into the feed box 8 again.

[0048] like Figure 7As shown, in some embodiments, a spring 16 is connected between the upper support plate 12 and the inner top wall of the feed box 8. By arranging the spring 16 between the upper support plate 12 and the feed box 8, the elastic force of the spring 16 is utilized to resist, so that the lower sealing plate 13 can effectively fit the fuel. As the unloading of the fuel decreases, the lower sealing plate 13 exerts a certain extrusion force on the fuel in conjunction with the elastic force of the spring 16, so that the fuel unloading is faster, and the lower sealing plate 13 has a better sealing effect on the open end of the feed box 8, thereby improving practicality.

[0049] like Figure 6 As shown, in some embodiments, bearing wheels 17 are respectively provided at both ends of the guide rod 1402, and the two bearing wheels 17 are respectively rolled and inserted into the two guide grooves 1401. By rotating the bearing wheels 17 on the guide rod 1402, the rolling of the bearing wheels 17 is used to reduce the friction resistance of the guide rod 1402 sliding along the first transverse groove 14011, the inclined groove 14012 and the second transverse groove 14013, so that the guide rod 1402 slides more smoothly and the movement of the lower sealing plate 13 is smoother, thereby improving practicality.

[0050] like Figure 1 、 Figure 2 and Figure 8 As shown, in some embodiments, the driving mechanism 15 includes: a bracket 1501, which is arranged on the boiler body 1, and a screw rod 1502 is rotatably arranged on the bracket 1501. Preferably, the actual thread length of the screw rod 1502 is consistent with the distance between the first discharge port 3 and the second discharge port 4. One end of the screw rod 1502 is connected to a motor 1503 arranged on the bracket 1501; a first connecting rod 1504, which has a U-shaped structure, one end of which is threadedly sleeved on the screw rod 1502, and the other end of which is movable through the closed end of the feeding pipe 2 and connected to the feeding box 8. 1503 works, and its output shaft drives the screw rod 1502 to rotate, and under the engagement of the thread, the first connecting rod 1504 is driven to move, thereby driving the feeding box 8 to move. When the end of the first connecting rod 1504 moves to one end of the screw rod 1502, the port of the guide tube 9 is aligned with the second discharge port 4. When the end of the first connecting rod 1504 moves to the other end of the screw rod 1502, the port of the feeding box 8 is aligned with the first discharge port 3. The motor 1503 rotates forward or reverse, thereby driving the feeding box 8 to slide back and forth along the feeding tube 2.

[0051] like Figure 2 and Figure 9As shown, in some embodiments, the discharge mechanism 7 includes: a material control plate 701, a through slot 702 is formed on the opposite side of the inner wall of the discharge pipe 6, the material control plate 701 slides through the two through slots 702, and one end of the material control plate 701 is penetrated by a feeding groove 703; preferably, the size of the notch of the feeding groove 703 is consistent with the size of the notch of the discharge pipe 6, and the position of the notch of the feeding groove 703 is consistent with the position of the port of the guide pipe 9, and the second connecting rod 704 is L-shaped, one end of which is connected to the material control plate 701, and the other end movably passes through the closed end of the feeding pipe 2 and is connected to the feeding box 8. When the feeding box 8 moves along the feeding pipe 2, the control plate 701 also slides along the two through grooves 702. When the port of the guide pipe 9 is connected with the second discharge port 4, the feed chute 703 is also connected with the discharge pipe 6, thereby realizing discharge. When the guide pipe 9 is staggered with the second discharge port 4, the feed chute 703 is also staggered with the discharge pipe 6, and the control plate 701 blocks the discharge pipe 6. The overall structure of the discharge mechanism 7 enables the discharge pipe 6 to be discharged or blocked when the feeding box 8 slides back and forth for loading or unloading, and the two are carried out synchronously, thereby improving practicality.

[0052] like Figure 9 As shown, in some embodiments, a rotating shaft 18 is rotated and penetrated on the opposite side of the inner wall of the discharge pipe 6, and a plurality of shift rods 19 are arranged in an array on the outer surface of the rotating shaft 18. A linkage 20 is provided between the rotating shaft 18 and the screw rod 1502. When the screw rod 1502 rotates, the linkage 20 drives the rotating shaft 18 to rotate synchronously. Since a certain amount of fuel is stored in the storage hopper 5, the fuel will squeeze each other, making the discharge pipe 6 prone to blockage. Through the provided rotating shaft 18 and the shift rod 19, when the screw rod 1502 rotates, the linkage 20 will drive the rotating shaft 18 to rotate synchronously, so that the shift rod 19 stirs the fuel. As the loading and unloading are reciprocated, the rotating shaft 18 rotates in real time, and the shift rod 19 stirs in real time, so that the fuel in the discharge pipe 6 is in an active state in real time, making it less likely to be blocked, thereby improving practicality.

[0053] like Figure 8 As shown, in some embodiments, the linkage member 20 includes: a rotating rod 2001, which is rotatably set on the bracket 1501; two bevel gears 2002, which are respectively fixed on the screw rod 1502 and the rotating rod 2001 and the teeth of the two are meshed; a pulley assembly 2003, which is connected to the rotating rod 2001 and the rotating shaft 18. When the screw rod 1502 rotates, the teeth of the two bevel gears 2002 are meshed, thereby driving the rotating rod 2001 to rotate synchronously, and utilizing the linkage of the pulley assembly 2003 to achieve the effect of driving the rotating shaft 18 to rotate synchronously.

[0054] like Figure 1 and Figure 2As shown, in some embodiments, a blower 21 is provided on the bracket 1501, and an air outlet of the blower 21 is connected to the boiler body 1 through an air pipe 22, and a one-way valve is provided on the air pipe 22. When the blower 21 works, it draws in and pressurizes the external air, and transports it to the combustion chamber of the boiler body 1 through the air pipe 22. When the fuel falls from the first discharge port 3, the wind flow will blow the fuel. Under the action of the wind, the fuel will be evenly blown into the combustion chamber, so as to increase the combustion specific surface area of ​​the fuel and the flame, so that the fuel burns more fully, thereby improving practicality.

[0055] like Figure 2 and Figure 10 As shown, in some embodiments, the feed pipe 2 is provided with a guide cylinder 23 connected to the first discharge port 3, and two bulking ports 24 are opened on one side of the guide cylinder 23. The two bulking ports 24 are distributed up and down, the bulking port 24 located at the top is a weak air port, and the bulking port 24 located at the bottom is a strong air port. The blower 21 has two air outlets, and the number of the air pipes 22 is two. One end of the two air pipes 22 is connected to the two air outlets respectively. The two air pipes 22 are divided into a weak air pipe and a strong air pipe. The wind pressure and wind speed of the weak air pipe are lower than those of the strong air pipe. The other ends of the two air pipes 22 are connected to the guide cylinder 23 and correspond to the two bulking ports 24 one by one. The weak air pipe and the strong air pipe correspond to the weak air port and the strong air port one by one respectively. Since the fuel is directly put into the bottom of the combustion chamber, the lower and middle areas of the combustion chamber The temperature of the fuel is higher than that of the middle and upper areas, and the fuel particles are also divided into different sizes. When the fuel falls from the first discharge port 3 into the guide cylinder 23, the fuel will first pass through the weak wind blowing area during the falling process. Under the blowing of weak wind, the fuel with smaller particles will be directly blown into the combustion chamber from the weak wind port, while the fuel with large particles will continue to fall downward. When passing through the strong wind blowing area, the strong wind will blow the large particles of fuel into the combustion chamber from the strong wind port. The fuel is screened and stripped by using two air flows with different wind pressures, and the fine particles are transported to the upper area of ​​the combustion chamber. The fuel with small particles burns quickly, which can increase the temperature of the upper area of ​​the combustion chamber, thereby avoiding the situation where the fuel is sent to the bottom of the furnace body of the boiler body 1 together, resulting in the furnace temperature at the bottom of the furnace body of the boiler body 1 being too high, thereby improving practicality.

[0056] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Hybrid circulating fluidized bed boiler, characterized in that: include: A boiler body (1) having a combustion chamber therein; A feed pipe (2) with an opening at one end is connected to the boiler body (1) and its open end extends into the combustion chamber, a first discharge port (3) is provided through the inner bottom wall of one end of the feed pipe (2) located in the combustion chamber, and a second discharge port (4) is provided through the top of one end of the feed pipe (2) located outside the boiler body (1); A storage hopper (5) is provided on the boiler body (1); a discharge end of the storage hopper (5) is connected to the second discharge port (4) via a discharge pipe (6); and a discharge mechanism (7) is provided on the discharge pipe (6); A feeding box (8) with an opening at the bottom is slidably arranged in the feeding tube (2), one side of the feeding box (8) is connected to a guide tube (9), a partition (10) is arranged in the feeding box (8) and above the communication opening of the guide tube (9), a guide rod (11) is slidably passed through the partition (10), and the upper and lower ends of the guide rod (11) are respectively connected to an upper support plate (12) and a lower sealing plate (13) that slide in the feeding box (8), and an adjusting member (14) for adjusting the sliding of the guide rod (11) is arranged in the feeding tube (2); A drive mechanism (15) is provided on the boiler body (1) for driving the feed box (8) to slide reciprocally along the feed pipe (2); The regulating member (14) comprises: Two guide grooves (1401) are respectively provided on opposite sides of the inner wall of the feeding pipe (2), and the guide groove (1401) has a first transverse groove (14011), an inclined groove (14012) and a second transverse groove (14013) that are connected to each other; A guide rod (1402) is provided on the upper support plate (12), and a through-groove (1403) is provided through the inner wall of the feed box (8) on the opposite side and above the partition (10), and both ends of the guide rod (1402) slide through the two through-grooves (1403) and are respectively slidably inserted into the two guide grooves (1401); The discharge mechanism (7) comprises: A material control plate (701) is provided, and through grooves (702) are provided on opposite sides of the inner wall of the discharge pipe (6). The material control plate (701) slides through the two through grooves (702), and a material passing groove (703) is provided on one end of the material control plate (701); The second connecting rod (704) is L-shaped, one end of which is connected to the material control plate (701), and the other end of which is movable through the closed end of the feeding tube (2) and connected to the feeding box (8).

2. The hybrid circulating fluidized bed boiler according to claim 1, characterized in that: A spring (16) is connected between the upper support plate (12) and the inner top wall of the feeding box (8).

3. The hybrid circulating fluidized bed boiler according to claim 1, characterized in that: Bearing wheels (17) are respectively sleeved on both ends of the guide rod (1402), and the two bearing wheels (17) are respectively rolled and inserted into the two guide grooves (1401).

4. The hybrid circulating fluidized bed boiler according to claim 1, characterized in that: The driving mechanism (15) comprises: A bracket (1501) is provided on the boiler body (1); a screw rod (1502) is rotatably provided on the bracket (1501); one end of the screw rod (1502) is connected to a motor (1503) provided on the bracket (1501); The first connecting rod (1504) is U-shaped, with one end threadedly sleeved on the screw rod (1502) and the other end movably passing through the closed end of the feeding tube (2) and connected to the feeding box (8).

5. The hybrid circulating fluidized bed boiler according to claim 4, characterized in that: A rotating shaft (18) is provided on the opposite side of the inner wall of the discharge pipe (6) for rotation. A plurality of shifting rods (19) are arranged in an array on the outer surface of the rotating shaft (18). A linkage member (20) is provided between the rotating shaft (18) and the screw rod (1502). When the screw rod (1502) rotates, the linkage member (20) drives the rotating shaft (18) to rotate synchronously.

6. The hybrid circulating fluidized bed boiler according to claim 5, characterized in that: The linkage member (20) comprises: A rotating rod (2001) is rotatably mounted on the bracket (1501); Two bevel gears (2002) are respectively fixed on the screw rod (1502) and the rotating rod (2001) and the teeth of the two are meshed; The pulley assembly (2003) is connected to the rotating rod (2001) and the rotating shaft (18).

7. The hybrid circulating fluidized bed boiler according to claim 6, characterized in that: A blower (21) is provided on the bracket (1501), an air outlet of the blower (21) is connected to the boiler body (1) via an air pipe (22), and a one-way valve is provided on the air pipe (22).

8. The hybrid circulating fluidized bed boiler according to claim 7, characterized in that: The feeding pipe (2) is provided with a guide cylinder (23) connected to the first discharge port (3), and two bulk material ports (24) are provided on one side of the guide cylinder (23). The blower (21) has two air outlets. There are two air pipes (22), one end of each of the two air pipes (22) is connected to the two air outlets respectively, and the other end of each of the two air pipes (22) is connected to the guide cylinder (23) and corresponds to the two bulk material ports (24) respectively.

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