A direct-flow boiler that is waterproof and cold-walled to prevent high-temperature corrosion

Abstract

The present invention relates to the technical field of boilers, and in particular to a direct current boiler which prevents high-temperature corrosion of water-cooled walls. The boiler comprises a boiler body, wherein a supporting mechanism, a combustion mechanism, a combustion-supporting mechanism and an air distribution mechanism are arranged on the boiler body, an adjusting mechanism is arranged on the combustion mechanism, and a closing mechanism is arranged on the combustion-supporting mechanism. The adjusting mechanism is arranged on the combustion mechanism, and the fuel injection direction of the combustion mechanism can be adjusted in advance to avoid direct collision of the flame and smoke generated by the fuel with the water-cooled wall, so as to reduce high-temperature corrosion of the water-cooled wall; through the cooperation of the combustion-supporting mechanism and the closing mechanism, it is convenient to add fuel oil to the furnace of the boiler body to assist combustion when the coal quality is poor, so as to avoid more smoke generated by insufficient combustion, thereby reducing the impact and corrosion of the water-cooled wall tubes; through the arranged air distribution mechanism, a parallel air film can be formed on the surface of the water-cooled wall, so as to reduce the impact of the smoke flow perpendicular to the surface of the water-cooled wall, and further reduce the high-temperature corrosion of the water-cooled wall.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, and in particular to a direct-flow boiler resistant to high-temperature corrosion of waterproof cold walls. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. A direct current boiler refers to a boiler that relies on the pressure of the feed water pump to pass the feed water through the economizer, water-cooled wall, and superheater in sequence and all of it is converted into superheated steam. It is mostly used in thermal power plants.

[0003] However, in the actual operation of traditional direct current boilers, after long-term use, the water-cooled wall heating surface is in contact with corrosive fuels containing high sulfur and high-temperature flue gas for a long time under high temperature and high pressure conditions, and is even impacted by the fuel and flue gas, which is prone to high-temperature corrosion. Furthermore, sometimes the coal quality is poor, which will affect the stability of combustion and cause incomplete combustion, thereby generating more flue gas particles, further increasing the high-temperature corrosion of the water-cooled wall tubes. After the water-cooled wall tubes are corroded, the tube walls are easily thinned, and there is even a risk of tube bursting, which ultimately affects the normal operation of the entire boiler. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a direct current boiler which is resistant to high-temperature corrosion of the water-cooled wall. By setting an adjusting mechanism, the fuel injection direction can be adjusted in advance to prevent the flame and smoke generated by the fuel from directly impacting the water-cooled wall, thereby reducing the high-temperature corrosion of the water-cooled wall. The combustion-supporting mechanism can add fuel oil to the furnace of the boiler body to assist combustion when the coal quality is poor, thereby preventing incomplete combustion from generating more smoke, thereby reducing the impact and corrosion on the water-cooled wall tubes. By setting an air distribution mechanism, a parallel air film is formed on the surface of the water-cooled wall, thereby reducing the impact of the smoke flow perpendicular to the surface of the water-cooled wall, and further reducing the high-temperature corrosion of the water-cooled wall.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a direct-flow boiler with waterproof cold wall high-temperature corrosion, comprising a boiler body, on which is installed:

[0006] A supporting mechanism, installed below the boiler body, for supporting the boiler body;

[0007] An air distribution mechanism, mounted on the support mechanism and extending into the interior of the boiler body, for introducing air flow into the boiler body to form an air film;

[0008] A combustion mechanism, installed at one end of the boiler body and in communication with the boiler body, for feeding fuel into the furnace of the boiler body;

[0009] The combustion assisting mechanism is installed on the pot body near the combustion mechanism and communicated with the boiler body, and is used for adding fuel to assist combustion to the boiler body;

[0010] The adjusting mechanism is installed on the combustion mechanism and is used for adjusting the injection direction of the combustion mechanism;

[0011] The closing mechanism is installed on the combustion assisting mechanism and is used for controlling the communication state between the combustion mechanism and the boiler body.

[0012] In some embodiments of the present application, the combustion mechanism includes a burner body, a connection frame and a nozzle which are communicated. One end of the burner body is connected to the connection frame through a flange. The connection frame is rotationally connected to the nozzle through a plurality of connecting shafts. The end of the burner body where the connection frame and the nozzle are installed is arranged inside the boiler body, and the adjusting mechanism is installed on the connection frame.

[0013] In some embodiments of the present application, the adjusting mechanism includes a handwheel and a tooth groove, a gear and a slider arranged inside the connection frame. The tooth groove is opened inside the connection frame. The slider is slidably installed inside one of the connecting shafts. The gear is engaged with the tooth groove and fixedly connected to the slider. One end of the handwheel is connected to the gear, and the handwheel can drive the gear and the slider to move.

[0014] In some embodiments of the present application, an installation frame is further arranged outside the connection frame. The handwheel penetrates through the installation frame and extends into the connection frame to be connected to the gear. A first spring is sleeved on the part of the handwheel extending into the installation frame.

[0015] In some embodiments of the present application, the combustion assisting mechanism includes a storage tank and a push block slidably connected inside the storage tank. The storage tank is communicated with the boiler body through a plurality of drain pipes. A connecting rod is fixedly connected to the push block, and one end of the connecting rod extending outside the storage tank is connected with a handle.

[0016] In some embodiments of the present application, a limiting rod is connected between the storage tank and the handle, and the limiting rod is slidably connected inside the storage tank.

[0017] In some embodiments of the present application, the closing mechanism is installed on each of the plurality of drain pipes. The closing mechanism includes a cover in a "U" shape and limiting columns connected to both ends of the cover. The cover is slidably sleeved on one end of the drain pipe and is located inside the boiler body. Second springs are sleeved on both of the limiting columns and are located inside the storage tank.

[0018] In some embodiments of the present application, the supporting mechanism includes multiple support rods and multiple base plates, the boiler body is installed on the base plate through the multiple support rods, and multiple support rods are fixedly connected between the multiple base plates, and the air distribution mechanism is installed on the base plate.

[0019] In some embodiments of the present application, the air distribution mechanism includes an air inlet frame and a plurality of air inlet pipes installed on the supporting mechanism, a fan is installed in the air inlet frame, one ends of the plurality of air inlet pipes are evenly installed on the air inlet frame, and the other ends of the plurality of air inlet pipes extend into the interior of the boiler body, so as to introduce the wind in the air inlet frame into the interior of the boiler body.

[0020] In some embodiments of the present application, a screen is installed in the air inlet pipe, and one end of the air inlet pipe extending into the boiler body is fixedly connected to two fixing rods, and a "V"-shaped guide plate is connected to the fixing rods, and the guide plate passes through the screen.

[0021] The beneficial effects of a direct-flow boiler with waterproof cold wall high-temperature corrosion disclosed by the present invention are:

[0022] 1. By arranging the adjustment mechanism on the combustion mechanism, it is convenient to adjust the fuel injection direction of the combustion mechanism in advance according to the actual working conditions, so as to avoid the flame and smoke generated by the fuel from directly colliding with the water-cooled wall, thereby reducing the high-temperature corrosion of the water-cooled wall; that is, in actual operation, the user can remove the burner body in advance according to the actual working conditions, and then manually press the hand wheel, so that the hand wheel moves under pressure, thereby driving the gear to move together, and the slider slides on the connecting shaft accordingly, and the first spring is compressed at the same time until the gear is disengaged from the tooth groove. At this time, the hand wheel can be rotated, and the rotation of the hand wheel drives the rotation of the gear, and the rotation of the gear drives the rotation of the connecting shaft through the slider, thereby driving the rotation of the nozzle. When the nozzle rotates to the appropriate position, the hand wheel is released, and the gear will be re-engaged in the tooth groove under the action of the first spring to complete the fixation of the nozzle, so that the fuel is sprayed from a fixed direction, thereby avoiding the flame and smoke generated by the fuel from directly colliding with the water-cooled wall.

[0023] 2. By arranging the closing mechanism on the combustion-supporting mechanism, through the cooperation of the combustion-supporting mechanism and the closing mechanism, it is convenient to add fuel oil to the furnace of the boiler body to assist combustion when the coal quality is poor, so as to avoid more smoke generated by incomplete combustion, thereby reducing the impact and corrosion on the water-cooled wall tubes and alleviating the high-temperature corrosion of the water-cooled wall; that is, in actual operation, when the coal quality is poor and the combustion is incomplete, the user can first manually hold the handle and pull it, and the movement of the handle drives the connecting rod to move, and then drives the push block to move, until the push block is pulled to one end inside the storage box, and the limit rod moves inside the storage box accordingly, then the lid on the storage box is opened, and then the storage box is moved to the storage box. The corresponding fuel is added to the tank, and the lid is closed again after the adding is completed. After that, the user can hold the handle and push it. The movement of the handle drives the connecting rod and the push block to move, and the push block will push the fuel inside the tank. The fuel is pressurized and transmitted to the sealing cover through the discharge pipe. The sealing cover moves after being pressurized, and the limit column moves accordingly. The second spring is compressed at the same time. When the sealing cover is completely separated from the tank, the fuel inside the tank will be discharged through the discharge pipe and enter the furnace inside the boiler body, so as to facilitate the addition of fuel to the furnace of the boiler body for combustion assistance when the coal quality is poor, ensure sufficient combustion in the boiler body, and reduce the generation of smoke.

[0024] 3. By setting up an air distribution mechanism, the air flow is introduced into the boiler body to form a parallel air film on the surface of the water-cooled wall, reducing the impact of the flue gas flow perpendicular to the water-cooled wall surface, and further reducing the high-temperature corrosion of the water-cooled wall; that is: in actual operation, the user can connect the fan to the power supply, and the fan starts to work, blowing air into the air inlet frame, and the air flow enters the air duct, and then passes through the screen and guide plate. Under the action of the arc-shaped conical guide plate, the air flow will be ejected in a direction parallel to the water-cooled wall, thereby facilitating the formation of a parallel air film on the surface of the water-cooled wall to protect the surface of the water-cooled wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a direct-flow boiler with waterproof cold wall high-temperature corrosion according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the connection structure between the combustion mechanism and the regulating mechanism in an embodiment of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at B in FIG.

[0028] Figure 4 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0029] Figure 5 This is a structural schematic diagram of a combustion-supporting mechanism in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the connection structure between the combustion-supporting mechanism and the closing mechanism in an embodiment of the present invention;

[0031] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at position C in FIG.

[0032] Figure 8 Schematic diagram of the internal structure of the air distribution mechanism in an embodiment of the present invention.

[0033] In the figure: 1. boiler body; 2. supporting mechanism; 201. support rod; 202. bottom plate; 203. support rod; 3. combustion mechanism; 301. burner body; 302. flange; 303. bolt; 304. connecting frame; 305. nozzle; 306. connecting shaft; 4. adjusting mechanism; 401. hand wheel; 402. placement frame; 403. first spring; 404. gear; 405. slider; 406. tooth groove; 5. combustion-supporting mechanism; 501. storage box; 502. handle; 503. connecting rod; 504. limiting rod; 505. push block; 506. row pipe; 6. closing mechanism; 601. cover; 602. limiting column; 603. second spring; 604. sealing ring; 7. air distribution mechanism; 701. air inlet frame; 702, fan; 703, air duct; 704, fixing rod; 705, guide plate; 706, screen. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, a direct current boiler with waterproof cold wall and high temperature corrosion resistance includes a boiler body 1, on which a supporting mechanism 2, a combustion mechanism 3, a combustion-supporting mechanism 5 and an air distribution mechanism 7 are provided, the combustion mechanism 3 is provided with an adjusting mechanism 4, and the combustion-supporting mechanism 5 is provided with a closing mechanism 6; the supporting mechanism 2 is installed below the boiler body 1 for supporting the boiler body 1; the air distribution mechanism 7 is installed on the supporting mechanism 2 and extends into the boiler body 1 for introducing airflow into the boiler body 1 to form an air film; the combustion mechanism 3 is installed at one end of the boiler body 1 and is connected to the boiler body 1 for feeding fuel into the furnace of the boiler body 1, the adjusting mechanism 4 is installed on the combustion mechanism 3 for adjusting the injection direction of the combustion mechanism 3; the combustion-supporting mechanism 5 is installed on the boiler body 1 close to the combustion mechanism 3 and is connected to the boiler body 1 for adding fuel to the boiler body 1 for combustion support, and the closing mechanism 6 is installed on the combustion-supporting mechanism 5 for controlling the connection state between the combustion mechanism 3 and the boiler body 1.

[0039] It should be noted that the regulating mechanism 4 is arranged on the combustion mechanism 3, and the fuel injection direction of the combustion mechanism 3 is adjusted in advance by the regulating mechanism 4 to avoid the flame and smoke generated by the fuel from directly colliding with the water-cooled wall, thereby reducing the high-temperature corrosion of the water-cooled wall; the combustion-supporting mechanism 5 is arranged on the boiler body 1, and the closing mechanism 6 is arranged on the combustion-supporting mechanism 5. Through the cooperation of the combustion-supporting mechanism 5 and the closing mechanism 6, fuel oil is added to the furnace of the boiler body 1 to assist combustion when the coal quality is poor, so as to avoid more smoke generated by insufficient combustion, thereby reducing the impact and corrosion on the water-cooled wall tubes and alleviating the high-temperature corrosion of the water-cooled wall; the air distribution mechanism 7 is arranged on the supporting mechanism 2 and placed in the boiler body 1, and a parallel air film is formed on the surface of the water-cooled wall by the air distribution mechanism 7, so as to reduce the impact of the smoke flow perpendicular to the surface of the water-cooled wall, and further reduce the high-temperature corrosion of the water-cooled wall.

[0040] like Figure 2As shown, in some embodiments of the present application, the combustion mechanism 3 includes a burner body 301, which is installed on the boiler body 1, and one end of the burner body 301 extends into the interior of the boiler body 1, and the end of the burner body 301 extending into the interior of the boiler body 1 is provided with a connecting frame 304, and the connecting frame 304 is rotatably connected to a nozzle 305 through two connecting shafts 306; the burner body 301 and the connecting frame 304 are fixedly connected by a flange 302, and the flange 302 between the burner body 301 and the connecting frame 304 is fixedly connected by bolts 303; when the boiler body 1 is working, the burner body 301 is operated in conjunction with the boiler powder feeder, and the burner body 301 is powered on, then the burner body 301 starts to work, and high-temperature and high-pressure air mixed with fuel pulverized coal is ejected, and then enters the furnace of the boiler body 1 through the connecting frame 304 and the nozzle 305, and the combustion process starts.

[0041] like Figure 2 and Figure 3 As shown, in some embodiments of the present application, the adjustment mechanism 4 includes a placement frame 402 and a hand wheel 401, the placement frame 402 is fixedly mounted on the connection frame 304, one end of the hand wheel 401 passes through the placement frame 402 and extends to the inside of the connection frame 304, a first spring 403 is wound around the hand wheel 401, and the first spring 403 is arranged between the hand wheel 401 and the placement frame 402; a tooth groove 406 is arranged inside the connection frame 304, a gear 404 is engaged with the tooth groove 406, one end of the hand wheel 401 extending into the connection frame 304 is connected to the gear 404, the gear 404 is hollow, and a slider 405 is fixedly connected to the gear 404, and the slider 405 is engaged with one of the connecting shafts 306; in actual operation, the user can remove the burner body 301 in advance according to the actual working conditions, and then manually press the hand wheel 401, so that the hand wheel 4 01 is pressed and moves, thereby driving the gear 404 to move together, the slider 405 slides on the connecting shaft 306 with the gear 404, and the first spring 403 is compressed until the gear 404 is disengaged from the tooth groove 406. At this time, the hand wheel 401 can be rotated, and the rotation of the hand wheel 401 drives the gear 404 to rotate. The gear 404 drives the connecting shaft 306 to rotate through the slider 405, and then drives the nozzle 305 to rotate. When the nozzle 305 rotates to a suitable position, the hand wheel 401 is released, and the gear 404 will be re-engaged in the tooth groove 406 under the action of the first spring 403, completing the fixation of the nozzle 305, so that the fuel is sprayed at the corresponding position, thereby avoiding the flame and smoke generated by the fuel from directly colliding with the water-cooled wall, thereby reducing the high-temperature corrosion of the water-cooled wall.

[0042] like Figure 4 and Figure 5As shown, in some embodiments of the present application, two combustion assisting mechanisms 5 are provided on both sides of the combustion mechanism 3 respectively. The combustion assisting mechanism 5 includes a storage tank 501 fixedly installed on the boiler body 1. A push block 505 is slidably connected inside the storage tank 501. One end of the push block 505 is conical, and the other end of the push block 505 is fixedly connected to a connecting rod 503. The connecting rod 503 extends outside the storage tank 501 and is connected to a handle 502. A limiting rod 504 is also fixedly connected to the handle 502. The other end of the limiting rod 504 is slidably connected inside the storage tank 501. A plurality of drain pipes 506 are fixedly connected to the storage tank 501. The storage tank 501 is in communication with the inside of the boiler body 1 through the drain pipes 506. In actual operation, when the coal quality is poor and the combustion is insufficient, the user can first manually hold the handle 502 and pull it. When the handle 502 moves, it drives the connecting rod 503 to move, and then drives the push block 505 to move until the end of the push block 505 inside the storage tank 501 is pulled. The limiting rod 504 moves inside the storage tank 501 accordingly. Then, open the lid on the storage tank 501, add the corresponding fuel into the storage tank 501, close the lid again after adding. After that, the user can hold the handle 502 and push it. The handle 502 moves to drive the connecting rod 503 and the push block 505 to move, and then the push block 505 will push the fuel inside the storage tank 501. The fuel is pressured and enters the furnace of the boiler body 1 through the drain pipes 506.

[0043] As Figure 6 and Figure 7 shown, in some embodiments of the present application, a closing mechanism 6 is installed on each drain pipe 506. The closing mechanism 6 includes a cover 601 in a "U" shape and a limiting post 602. The cover 601 is arranged inside the boiler body 1 and is slidably connected to the drain pipe 506. A sealing ring 604 is fixedly connected inside the cover 601, and the whole cover 601 is in a "U" shape. Two limiting posts 602 are fixedly connected to both ends of the cover 601. The limiting posts 602 are slidably connected inside the storage tank 501. A second spring 603 is wound around the limiting posts 602. The second spring 603 is arranged between the limiting posts 602 and the storage tank 501. When adding fuel into the furnace of the boiler body 1 through the combustion assisting mechanism 5, the fuel is transmitted to the cover 601 after passing through the drain pipe 506. The cover 601 moves under pressure, and the limiting posts 602 move accordingly. The second spring 603 is compressed at the same time. When the cover 601 completely disengages from the inside of the storage tank 501, the fuel inside the storage tank 501 will be discharged through the drain pipe 506 and enter the furnace inside the boiler body 1, enabling the fuel in the boiler to burn sufficiently, thus avoiding more flue gas generated by insufficient combustion, and further reducing the impact and corrosion on the water wall tubes, and alleviating the high-temperature corrosion of the water wall.

[0044] As Figure 1As shown, in some embodiments of the present application, the supporting mechanism 2 includes a plurality of support rods 201 and a plurality of bottom plates 202. Two bottom plates 202 are provided at the bottom of the boiler body 1. Two support rods 201 are fixedly connected to each bottom plate 202. The support rods 201 are fixedly connected to the boiler body 1. Two support rods 203 are fixedly connected between the two bottom plates 202. When in use, the support rods 201 and the bottom plates 202 support and place the entire device, and the support rods 203 strengthen the supporting force of the bottom plates 202.

[0045] like Figure 1 and Figure 8 As shown, in some embodiments of the present application, an air distribution mechanism 7 is installed on the bottom plate 202, and the air distribution mechanism 7 includes an air inlet frame 701 and a plurality of air inlet pipes 703. The air inlet frame 701 is fixedly connected to the bottom plate 202, and a fan 702 is installed on the air inlet frame 701. One end of the plurality of air pipes 703 is evenly installed on the air inlet frame 701, and the other end extends to the inside of the boiler body 1. Two fixing rods 704 are fixedly connected to each air pipe 703 located inside the boiler body 1, and guide plates 705 are fixedly connected to the two fixing rods 704. A screen 706 is installed inside the air pipe 703, and the guide plate 705 passes through the screen 706. In actual operation, the user can connect the fan 702 to the power supply, and the fan 702 starts to work and blows air toward the air inlet frame 701. Air is blown inside and enters the air duct 703, then passes through the screen 706 and the guide plate 705. Under the action of the arc-shaped conical guide plate 705, the air flow will be ejected in a direction parallel to the water-cooled wall, thereby forming a parallel air film on the surface of the water-cooled wall, reducing the impact of the flue gas flow perpendicular to the surface of the water-cooled wall, so as to further reduce the high-temperature corrosion of the water-cooled wall.

[0046] In summary, the present invention provides a direct current boiler with waterproof cold wall and high temperature corrosion resistance. The support rod 201 and the bottom plate 202 play a supporting role for the entire device. The support rod 203 strengthens the supporting force of the bottom plate 202. When the boiler body 1 starts to work, the burner body 301 is operated in coordination with the boiler powder feeder, and the burner body 301 is powered on. Then, the burner body 301 starts to work, and the high-temperature and high-pressure air mixed with the fuel pulverized coal is sprayed into the furnace of the boiler body 1 through the connecting frame 304 and the nozzle 305 to start the combustion process. At the same time, in actual operation, the user can adjust the burner body 301 in advance according to the actual working conditions. After the hand wheel 401 is disassembled, the hand wheel 401 is manually pressed, and the hand wheel 401 moves under pressure, thereby driving the gear 404 to move together, and the slider 405 slides on the connecting shaft 306, and the first spring 403 is compressed at the same time, until the gear 404 is disengaged from the tooth groove 406. At this time, the hand wheel 401 can be rotated, and the rotation of the hand wheel 401 drives the gear 404 to rotate, and the rotation of the gear 404 drives the connecting shaft 306 to rotate through the slider 405, and then drives the nozzle 305 to rotate. When the nozzle 305 rotates to a suitable position, the hand wheel 401 is released, and the first spring 403 is pressed. Under the action of the gear 404, the gear 404 will be re-engaged into the tooth groove 406 to complete the fixation of the nozzle 305, so that it is convenient to adjust the injection direction of the nozzle 305 in advance according to the actual working conditions, so as to avoid the flame smoke generated by the fuel from directly colliding with the water-cooled wall, thereby reducing the high-temperature corrosion of the water-cooled wall; further, the user can also connect the fan 702 to the power supply, and the fan 702 starts to work, blowing air toward the inside of the air inlet frame 701, and the airflow enters the air duct 703, and then passes through the screen 706 and the guide plate 705. Under the action of the arc-shaped conical guide plate 705, the airflow is ejected in a direction parallel to the water-cooled wall, thereby forming a parallel air film on the surface of the water-cooled wall, reducing the impact of the smoke flow perpendicular to the surface of the water-cooled wall, so as to further reduce the high-temperature corrosion of the water-cooled wall;In addition, when the coal quality is poor and the combustion is incomplete, the user can first manually hold the handle 502 and pull it. The movement of the handle 502 drives the connecting rod 503 to move, and then drives the push block 505 to move, until the push block 505 is pulled to one end inside the tank 501, and the limit rod 504 moves inside the tank 501. Then, the lid on the tank 501 is opened, and the corresponding fuel is added to the tank 501. After the addition is completed, the lid is closed again. After that, the user can hold the handle 502 to When the handle 502 is pushed, the connecting rod 503 and the push block 505 move, and the push block 505 pushes the fuel inside the tank 501. The fuel is pressurized and transferred to the cover 601 through the discharge pipe 506. The cover 601 moves after being pressurized, and the limit column 602 moves accordingly. The second spring 603 is compressed at the same time. When the cover 601 is completely separated from the tank 501, the fuel inside the tank 501 will be discharged through the discharge pipe 506 and enter the furnace inside the boiler body 1, so that it is convenient to add fuel to the furnace of the boiler body 1 to assist combustion when the coal quality is not good, avoid incomplete combustion to produce more smoke, thereby reducing the impact and corrosion on the water-cooled wall tube, and further alleviating the high-temperature corrosion of the water-cooled wall. ;

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A direct-flow boiler with waterproof cold wall high temperature corrosion protection, comprising a boiler body (1), characterized in that: The following are installed on the boiler body (1): A support mechanism (2), installed below the boiler body (1) for supporting the boiler body (1); An air distribution mechanism (7), installed on the support mechanism (2) and extending into the boiler body (1) for introducing air flow into the boiler body (1) to form an air film; A combustion mechanism (3), installed at one end of the boiler body (1) and communicating with the boiler body (1) for injecting fuel into the furnace of the boiler body (1); An auxiliary combustion mechanism (5), installed on the boiler body (1) near the combustion mechanism (3) and communicating with the boiler body (1) for adding fuel oil to assist combustion of the boiler body (1); An adjustment mechanism (4), installed on the combustion mechanism (3) for adjusting the injection direction of the combustion mechanism (3); A closing mechanism (6), installed on the auxiliary combustion mechanism (5) for controlling the communication state between the combustion mechanism (3) and the boiler body (1); The auxiliary combustion mechanism (5) includes a storage tank (501) and a push block (505) slidably connected in the storage tank (501). The storage tank (501) is communicated with the boiler body (1) through a plurality of exhaust pipes (506). A connecting rod (503) is fixedly connected to the push block (505), and one end of the connecting rod (503) extending outside the storage tank (501) is connected with a handle (502); A limiting rod (504) is connected between the storage tank (501) and the handle (502), and the limiting rod (504) is slidably connected in the storage tank (501); The closing mechanism (6) is installed on each of the plurality of exhaust pipes (506). The closing mechanism (6) includes a cover (601) in a "U" shape and limiting columns (602) connected to both ends of the cover (601). The cover (601) is slidably sleeved on one end of the exhaust pipe (506) and located inside the boiler body (1). Second springs (603) are sleeved on both of the limiting columns (602) and located inside the storage tank (501).

2. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 1 is characterized in that: The combustion mechanism (3) includes a connected burner body (301), a connecting frame (304) and a nozzle (305). One end of the burner body (301) is connected to the connecting frame (304) through a flange (302). The connecting frame (304) is rotatably connected to the nozzle (305) through a plurality of connecting shafts (306). The end of the burner body (301) where the connecting frame (304) and the nozzle (305) are installed is arranged inside the boiler body (1). The adjustment mechanism (4) is installed on the connecting frame (304).

3. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 2 is characterized in that: The adjusting mechanism (4) comprises a hand wheel (401), a tooth groove (406), a gear (404) and a slider (405) arranged in the connecting frame (304); the tooth groove (406) is arranged in the connecting frame (304); the slider (405) is slidably mounted inside one of the connecting shafts (306); the gear (404) is engaged with the tooth groove (406) and fixedly connected with the slider (405); one end of the hand wheel (401) is connected to the gear (404); and the hand wheel (401) can drive the gear (404) and the slider (405) to move.

4. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 3 is characterized in that: A placement frame (402) is also provided outside the connection frame (304); the hand wheel (401) passes through the placement frame (402) and extends into the connection frame (304) to be connected with the gear (404); and a first spring (403) is sleeved on the portion of the hand wheel (401) extending into the placement frame (402).

5. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 1 is characterized in that: The support mechanism (2) comprises a plurality of support rods (201) and a plurality of bottom plates (202); the boiler body (1) is mounted on the bottom plate (202) via the plurality of support rods (201); a plurality of support rods (203) are fixedly connected between the plurality of bottom plates (202); and the air distribution mechanism (7) is mounted on the bottom plate (202).

6. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 1, characterized in that: The air distribution mechanism (7) comprises an air inlet frame (701) and a plurality of air inlet pipes (703) mounted on the support mechanism (2); a fan (702) is mounted in the air inlet frame (701); one ends of the plurality of air inlet pipes (703) are evenly mounted on the air inlet frame (701); the other ends of the plurality of air inlet pipes (703) extend into the interior of the boiler body (1), so as to introduce the air in the air inlet frame (701) into the interior of the boiler body (1).

7. The once-through boiler with waterproof cold wall and high temperature corrosion resistance according to claim 6, characterized in that: A screen (706) is installed in the air inlet pipe (703), and one end of the air inlet pipe (703) extending into the boiler body (1) is fixedly connected to two fixing rods (704), and a "V"-shaped guide plate (705) is connected to the fixing rods (704), and the guide plate (705) passes through the screen (706).

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