Wall attachment air device, air distribution unit, and boiler system

Abstract

The utility model provides a kind of wall-attached air device, air distribution unit and boiler system, the structure of wall-attached air device is improved, the de-coking operation can be carried out to the nozzle part to avoid the nozzle part to be blocked. Wall-attached air device includes the nozzle part covered in one end in the hearth wall part, the air pipe of the other end communication with air source, the opening part for inserting de-coking member is provided in air pipe, opening part can be opened or closed. By the way of opening opening part in the lateral wall of air pipe to insert de-coking member, the de-coking operation can be carried out to the nozzle part, to avoid the nozzle part to be blocked.

Description

Technical Field

[0001] This utility model relates to the field of boiler combustion and heat exchange technology, specifically to a wall-mounted air device, an air distribution unit, and a boiler system. Background Technology

[0002] Wall-mounted air devices, as effective auxiliary combustion and protection equipment, are widely used in boiler systems. They are used to inject air with a certain velocity and flow rate (wall-mounted air) into the boiler furnace through wall-mounted air nozzles to improve the combustion environment.

[0003] However, during boiler operation, the furnace contains a large amount of high-temperature flue gas, fly ash particles, and unburned fuel particles. These substances, under the influence of airflow, easily adhere to the wall-mounted air nozzles, causing blockage. Utility Model Content

[0004] The purpose of this invention is to provide a wall-mounted air device, an air distribution unit, and a boiler system. By improving the structure of the wall-mounted air device, it is possible to perform a descaling operation on the nozzle, thereby avoiding nozzle blockage.

[0005] To achieve the above objectives, this utility model provides a wall-mounted air device, which includes an air duct with one end covering a nozzle portion formed in the furnace wall and the other end connected to an air source. The air duct has an opening for inserting a descaling component, and the opening is also equipped with a sealing component, which allows the opening to be opened or closed. By inserting the descaling component through an opening in the side wall of the air duct, descaling operations can be performed on the nozzle portion, thereby preventing nozzle blockage.

[0006] Optionally, the decoking component includes a decoking rod. By inserting a portion of the decoking rod into the air duct through the opening and breaking up the coke residue at the nozzle, the decoking operation at the nozzle can be performed quickly.

[0007] Optionally, a coke removal head is also provided at one end of the decoking rod located inside the air duct. By providing the decoking head, the coke residue can be crushed, thereby improving the crushing efficiency of the coke residue.

[0008] Optionally, the decoking component is a blowpipe connected to a gas source, where the pressure of the gas source is greater than that of the air source. The coke residue at the nozzle is blown out through the blowpipe connected to the high-pressure gas source, thereby performing a decoking operation at the nozzle.

[0009] Optionally, N openings are provided, where N is an integer greater than or equal to 2. This allows for coke removal around the circumference of the duct, avoiding dead zones in the coke removal process.

[0010] Optionally, the openings are evenly distributed along the duct wall. This multiple evenly distributed openings allow decoking personnel to flexibly select the most suitable opening for decoking operations based on the distribution of coke residue. There is no need to frequently adjust the position or angle of the decoking tools to adapt to decoking needs.

[0011] Optionally, the central axis of the duct is a continuous straight line along its length. When the central axis of the duct is a continuous straight line, the operating path of the descaling rod inside the duct becomes straight and unobstructed. The descaling rod can be smoothly advanced and withdrawn along the central axis of the duct without having to deal with the additional friction and resistance caused by the bending of the duct.

[0012] Optionally, the duct has a conical structure, with the larger diameter end covering the nozzle and the smaller diameter end connected to the air source. The conical structure allows the airflow to more effectively impact the coke residue, quickly peeling off and dispersing the coke residue adhering to the inner wall of the equipment or near the nozzle. Compared to traditional straight-tube ducts, the conical duct generates a stronger airflow impact, resulting in a more significant coke removal effect, greatly shortening the coke removal time and improving the coke removal efficiency.

[0013] Optionally, the sealing element is a door or plug capable of sealing the opening.

[0014] The air distribution unit includes an air source and a wall-mounted air device, with the air source connected to one end of the air duct. By inserting a descaling component through an opening in the side wall of the air duct, descaling can be performed on the nozzle, thus preventing nozzle blockage and improving the operational stability of the air distribution unit.

[0015] The boiler system includes an air distribution unit. By employing the wall-mounted air device in this solution, slag removal can be performed at the nozzle, thereby ensuring the stable operation of the boiler system.

[0016] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0018] Figure 1 This is a structural schematic diagram and side view of a wall-mounted ventilation device according to an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram and side view of another wall-mounted ventilation device in this embodiment of the present invention;

[0020] Figure 3 This is a structural diagram of the opening area.

[0021] Figure label:

[0022] 101-Furnace chamber; 101-1-Opening area; 101a-Nozzle section; 101a-1-First nozzle; 101a-2-Second nozzle; 101a-3-Third nozzle; 102-Air duct; 102a-Opening section; 102a-1-First opening; 102a-2-Second opening; 102a-3-Ridge section; 102-1-Large diameter end; 102-2-Small diameter end; 103a-Coke removal rod; 103b-Coke removal head; 104-Blowbox; s-Central axis. Detailed Implementation

[0023] This utility model provides a wall-mounted air device, an air distribution unit, and a boiler system. By improving the structure of the wall-mounted air device, it is possible to perform a descaling operation on the nozzle, thereby avoiding nozzle blockage.

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0026] Please refer to Figures 1 to 3 , Figure 1 This is a structural schematic diagram and side view of a wall-mounted ventilation device according to an embodiment of this utility model; Figure 2 This is a schematic diagram and side view of another wall-mounted ventilation device in this embodiment of the present invention; Figure 3 This is a structural diagram of the opening area.

[0027] like Figure 1 and Figure 2 As shown, this utility model provides a wall-mounted air device, which includes a nozzle 101a with one end covering a portion of the furnace wall 101, and an air duct 102 with the other end directly or indirectly connected to an air source. The air source provides high-pressure airflow to the wall-mounted air device and can be a centrifugal fan or a compressed air system. The air duct 102 forms an air channel, serving as an airflow delivery channel, connecting the nozzle 101a to the air source, ensuring stable and efficient airflow delivery to the nozzle 101a. The air duct 102 can be made of high-pressure resistant and high-temperature resistant steel pipe (such as stainless steel 310S or alloy steel).

[0028] Nozzle portions 101a are formed in a portion of the wall of the furnace 101 to spray airflow provided by the air source at a specific direction and speed near the wall of the furnace 101, forming a protective air curtain (wall-mounted air). The cross-section of the nozzle portion 101a can be rectangular or circular. Rectangular nozzle portions 101a facilitate the formation of a flat air curtain, while circular nozzle portions 101a are suitable for localized enhanced cooling. In the example shown in the figure, the cross-section of the nozzle portion 101a is rectangular, and three nozzle portions 101a are grouped together. The example shown in the figure is an illustrative example; those skilled in the art can choose the cross-sectional shape, arrangement, and size of the nozzle portions 101a as needed.

[0029] In this way, the air source generates a high-pressure airflow, which is then transported to the nozzle 101a through the air duct 102. The airflow is then sprayed onto the wall of the furnace 101 at a specific angle, forming a wall-mounted air curtain that isolates the high-temperature flue gas.

[0030] The duct 102 is provided with an opening 102a for inserting a descaling component, and the opening 102a can be opened or closed. When a descaling operation is required, the opening 102a is switched to the open state, and the descaling component is inserted into the duct 102. When the descaling operation is completed, the opening 102a is switched to the closed state.

[0031] The following example illustrates how the opening 102a is opened and closed.

[0032] The wall-mounted ventilation device in this solution also includes a sealing element, which can be a door hinged to the duct 102; or, the sealing element can be a door slidably connected to the duct 102. In the closed state, the door wraps around the outer wall of the duct 102 and covers the opening 102a while forming a sealed connection with the opening 102a.

[0033] The sealing connection can be achieved by setting a sealing ring on the part of the sealing element that presses against the side wall of the duct 102, with the sealing ring surrounding the opening 102a.

[0034] The sealing component can also be a plug, which is inserted into the opening 102a.

[0035] Other sealing components may also be used, as long as they can enable the opening and closing of the opening 102a.

[0036] In addition, those skilled in the art may choose other methods to open and close the opening 102a.

[0037] By inserting a descaling component through an opening 102a in the side wall of the duct 102, the nozzle 101a can be descaled, thereby preventing the nozzle 101a from becoming clogged.

[0038] In the aforementioned technical solution, one end of the duct 102 is indirectly connected to the air source. Specifically, a bellows 104 connects the air source and the duct 102. The bellows 104 serves to even out the airflow and also facilitates the installation of the air source.

[0039] In the above embodiment, the coke removal component includes a coke removal rod 103a. The coke removal rod 103a can crush the coke residue under the drive of an external force, and the crushed coke residue is blown out of the air duct 102 through the nozzle 101a under the action of the high-pressure airflow from the air source.

[0040] By inserting a portion of the decoking rod 103a into the air duct 102 through the opening 102a and breaking up the coke residue in the nozzle 101a, the decoking operation of the nozzle 101a can be performed quickly.

[0041] Optionally, a coke removal head 103b is also provided at one end of the coke removal rod 103a located inside the air duct 102. By providing the coke removal head 103b, the coke residue can be crushed, improving the crushing efficiency. The coke removal head 103b can be a sphere, cone, etc., and it protrudes outward from the coke removal rod 103a. Both the coke removal rod 103a and the coke removal head 103b can be made of high-temperature resistant stainless steel.

[0042] In other embodiments, the decoking component is a blowpipe connected to a gas source, where the pressure of the gas source is greater than that of the air source. The gas source can also be a centrifugal fan or a compressed air system, but the pressure of the airflow within the gas source must be greater than that within the air source. Alternatively, the pressure of the airflow used for decoking can be adjusted by changing the diameter of the blowpipe. The goal is to ensure that the pressure of the gas ejected from the blowpipe is greater than the pressure within the air duct 102. The decoking operation is performed on the nozzle 101a by blowing away the coke deposits at the nozzle 101a through the blowpipe connected to the high-pressure gas source.

[0043] In other embodiments of this solution, the side wall of the duct 102 is provided with N openings 102a, where N is an integer greater than or equal to 2. This ensures that the coking of each wall-mounted air nozzle 101a is within the working range of the nozzle 101a anti-clogging system, enabling coking removal operations to be performed around the circumference of the duct 102, thus avoiding the existence of dead zones in the coking removal process.

[0044] In the example shown, four openings 102a are provided, namely the first opening 102a-1, the second opening 102a-2, the third opening, and the fourth opening. The openings 102a are evenly distributed on the wall of the duct 102. The openings 102a are located approximately in the middle of the duct 102 along the extension direction of the central axis 's'. The openings 102a can be processed by cutting or stamping.

[0045] Therefore, the multiple evenly distributed openings 102a allow decoking personnel to flexibly select the most suitable opening 102a for decoking operations based on the distribution of coke residue. This eliminates the need for frequent adjustments to the position or angle of the decoking tools to suit decoking requirements.

[0046] In some other embodiments of this solution, the central axis s of the duct 102 is a continuous straight line along its length. That is, the air source and the furnace 101 are arranged opposite each other along the central axis s of the duct 102. When the central axis s of the duct 102 is a continuous straight line, the operating path of the descaling rod 103a inside the duct 102 becomes straight and unobstructed. The descaling rod 103a can be smoothly advanced and withdrawn along the central axis s of the duct 102 without having to deal with the additional friction and resistance caused by the bending of the duct 102.

[0047] In the aforementioned embodiments, the duct 102 has a conical structure, and its cross-section can be circular, triangular, or rectangular. The larger diameter end 102-1 covers the nozzle 101a, while the smaller diameter end 102-2 connects to the air source. The conical structure of the duct 102 allows the airflow to more effectively impact the coke residue, quickly peeling off and dispersing the coke residue adhering to the inner wall of the equipment or near the nozzle 101a. Compared to the traditional straight-tube duct 102, the conical duct 102 generates a stronger airflow impact force, resulting in a more significant coke removal effect, greatly shortening the coke removal time and improving the coke removal efficiency.

[0048] Combination Figure 1 , Figure 2 as well as Figure 3 As shown in this embodiment, the large-diameter end 102-1 of the tapered duct 102 with a rectangular cross-section covers the outer wall of the furnace 101, forming an opening region 101-1. The opening region 101-1 is rectangular. Within the opening region 101-1, a first nozzle 101a-1, a second nozzle 101a-2, and a third nozzle 101a-3 are provided. All three nozzles are rectangular and are spaced apart along the length of the opening region 101-1. In the width direction, the first nozzle 101a-1, the second nozzle 101a-2, and the third nozzle 101a-3 are also spaced apart from the edge of the opening region 101-1.

[0049] In order to ensure that the desiccant 103a can cover each nozzle 101a within its swing range, the length dimension of each nozzle 101a depends on the swing range of the desiccant 103a. Of course, it is also possible to exceed the swing range of a single desiccant 103a, which can be achieved by opening a number of openings 102a around the periphery of the air duct 102.

[0050] In the example shown, the first opening 102a-1 and the second opening 102a-2 are visible in the side view, while the third and fourth openings are not shown. The first opening 102a-1, the second opening 102a-2, the third opening, and the fourth opening are all located at the corner positions of the duct 102.

[0051] That is, the tapered structure duct 102 with a rectangular cross section has four ridges 102a-3 on its outer side, and each opening 102a is set on the ridge 102a-3.

[0052] This solution also provides an air distribution unit, including an air source and a wall-mounted air device, with the air source connected to one end of the air duct 102. By inserting a descaling component through an opening 102a in the side wall of the air duct 102, descaling of the nozzle 101a can be performed, thereby preventing the nozzle 101a from becoming blocked and improving the stability of the air distribution unit's operation.

[0053] In a third aspect of this solution, a boiler system is also provided, including an air distribution unit. By employing the wall-mounted air device in this solution, slag removal can be performed on the nozzle section 101a, thereby ensuring the stable operation of the boiler system.

[0054] Compared with existing technical solutions on the market, the advantages of this solution are:

[0055] First, the wall-adhering air device in this solution has a simple and reasonable structure and is easy to install. It can form an air film on the inner surface of the water-cooled wall to alleviate high-temperature corrosion, and it can also avoid coking at the wall-adhering air nozzle 101a, which would affect the wall-adhering air effect, thus improving the boiler's operational safety and stability.

[0056] Secondly, by inserting a portion of the decoking rod 103a into the air duct 102 through the opening 102a and breaking up the coke residue in the nozzle 101a, the decoking operation of the nozzle 101a can be performed quickly.

[0057] Third, the coke deposit at the nozzle 101a is blown out through a blowpipe connected to a high-pressure gas source, thereby performing a coke removal operation on the nozzle 101a.

[0058] Fourth, the multiple evenly distributed openings 102a allow decoking personnel to flexibly select the most suitable opening 102a for decoking operations based on the distribution of coke residue. This eliminates the need for frequent adjustments to the position or angle of the decoking tools to meet decoking requirements.

[0059] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A wall-mounted ventilation device, characterized in that, It includes an air duct (102) with one end covering the nozzle (101a) and the other end connected to an air source, wherein the air duct (102) is provided with an opening (102a) for inserting a descaling component. It also includes a sealing member for sealing the opening (102a), which is capable of being opened or closed.

2. The wall-mounted ventilation device according to claim 1, characterized in that, It also includes a desiccant removal component, which includes a desiccant removal rod (103a).

3. The wall-mounted ventilation device according to claim 2, characterized in that, The descaling rod (103a) is also provided with a descaling head (103b) at one end located inside the air duct (102).

4. The wall-mounted ventilation device according to claim 1, characterized in that, The decoking component is a blowpipe connected to the gas source, and the pressure of the gas ejected from the blowpipe is greater than the pressure inside the air duct (102).

5. The wall-mounted ventilation device according to claim 1, characterized in that, The duct has N openings (102a), where N is an integer greater than or equal to 2; the openings (102a) surround the duct (102) and are evenly distributed on the wall of the duct (102).

6. The wall-mounted ventilation device according to any one of claims 1-5, characterized in that, Along the length of the duct (102), the central axis (s) of the duct (102) is a continuous straight line.

7. The wall-mounted ventilation device according to claim 6, characterized in that, The duct (102) has a conical structure, with the large-diameter end (102-1) covering the nozzle (101a) and the small-diameter end (102-2) connected to the air source.

8. The wall-mounted ventilation device according to any one of claims 1-5, characterized in that, The sealing element is a door or plug capable of sealing the opening (102a).

9. An air distribution unit, characterized in that, Includes an air source and a wall-mounted air device as described in any one of claims 1-8, wherein the air source is connected to one end of the air duct (102).

10. A boiler system, characterized in that, Includes the air distribution unit as described in claim 9.

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