Fluidized gas nozzle

Abstract

The utility model discloses a fluidizing gas nozzle. The nozzle includes a nozzle inflow tube and a nozzle cap. The nozzle inflow tube includes a first inflow tube end disposed outside the nozzle cap and a second inflow tube end disposed inside the nozzle cap. The nozzle cap includes a plurality of flow channels arranged alongside the second inflow tube end, the flow channels having a closed first end and an open second end opposite the first end. The first end portion is connected with the second inflow pipe end portion through the circulation hole, and the second end portion opens to a lower end portion of the nozzle cover which is open in a direction of the first inflow pipe end portion, thereby providing a gas flow path which flows through the circulation hole from the first end portion of the nozzle inflow pipe to the second end portion thereof in a first direction. The flow channel is then passed in a second direction from the first end of the flow channel to the open second end. Therefore, the gas flow capacity can be widely controlled without changing the external size of the fluidizing gas nozzle.

Description

Technical Field

[0001] The utility model relates to a fluidizing gas nozzle. Background Art

[0002] Fluidized bed apparatuses (e.g., fluidized bed reactors and furnaces) are commonly used for chemical reactions, such as combustion or gasification. There, a fluidizing gas (e.g., air) is supplied to the reactor through a bed material (usually comprising sand and fuel) so that the bed becomes fluidized and easily movable. The fluidizing gas may be supplied to the fluidized bed apparatus through a plurality of fluidizing gas nozzles. The desired capacity of the fluidizing gas nozzles to supply gas may vary widely, depending, for example, on the size of the fluidized bed apparatus, the number of nozzles in the fluidized bed apparatus, and the fuel to be burned.

[0003] A problem with known fluidizing gas nozzles relates to the need to provide nozzles with different gas volume flow capacities. A nozzle designed for feeding a lower gas volume flow is not suitable for feeding a much higher volume flow because the gas velocity will change greatly up to the point where the fast jet hits the bed particles and increases particle breakage. This is a problem with nozzle designs with a nozzle cover arranged on the nozzle inlet pipe, but the problem is even more pronounced in nozzles without a nozzle cover. The particle breakage produces fine particles, which in turn lead to low efficiency or undesirable product characteristics of the fluidized bed plant. The change in gas velocity can be avoided by making a larger nozzle, but this means complex processes in the manufacture and logistics of the nozzle and in the design of the fluidized bed plant. Utility Model Content

[0004] From a first aspect, a fluidizing gas nozzle can be provided, comprising a nozzle inlet pipe and a nozzle cover, wherein the nozzle inlet pipe comprises a first inlet pipe end arranged outside the nozzle cover and a second inlet pipe end arranged inside the nozzle cover, wherein the nozzle cover comprises a plurality of flow channels arranged alongside the second inlet pipe end, the flow channels having a closed first end and an open second end opposite to the first end, the closed first end being connected to the second inlet pipe end via a flow hole, and the open second end being open to a lower end of the nozzle cover which is open in the direction of the first inlet pipe end, so that a gas flow path is provided, the gas flow path being: along a first direction from the first end of the nozzle inlet pipe to its second end, through the flow hole, and then along a second direction, i.e., a direction at least substantially opposite to the first direction, from the first end of the flow channel to the open second end through the flow channel.

[0005] A fluidizing gas nozzle is thus provided in which the gas flow capacity can be widely controlled by sizing and coordinating a flow channel arranged in the nozzle cover and a flow hole for directing gas from the nozzle inlet pipe to the flow channel, without the need to change the external dimensions of the fluidizing gas nozzle.

[0006] Viewed from another aspect there may be provided a method for manufacturing a fluidising gas nozzle as defined above, the method comprising:

[0007] - providing a mold piece for shaping the outer shape of the nozzle,

[0008] - providing a set of inserts, which are shaped parts that shape the flow channel and the flow holes, the flow channel being arranged next to the end of the second inlet pipe,

[0009] - providing a core that shapes the inner shape of the nozzle inflow tube,

[0010] - assembling the mold by using the mold pieces, insert pieces and core pieces,

[0011] - filling the mould with molten metal, and

[0012] - allowing the metal to solidify,

[0013] - disassembling the mould, including removing the insert and releasing the cast product including the nozzle inlet tube (1) and the nozzle cover, and

[0014] - optionally subjecting the cast product to a finishing process for finishing the gas nozzle.

[0015] Thus, a method is provided for manufacturing a fluidizing gas nozzle whose gas flow capacity can be widely controlled by varying the dimensions of the inserts that shape the flow channels and flow holes, without having to change the mold pieces that shape the outer shape of the nozzle.

[0016] Viewed from another aspect there may be provided a method for manufacturing a fluidising gas nozzle as defined above, the method comprising:

[0017] - providing the nozzle inlet tube and the nozzle cover as separate components,

[0018] - producing said flow hole at said second inflow end of said nozzle inflow pipe,

[0019] - attaching the nozzle inlet tube to the nozzle cover so that the flow hole connects the flow channel to the second inlet end, and

[0020] - optionally performing a finishing operation for finishing the gas nozzle.

[0021] Thus, a method is provided for manufacturing a fluidizing gas nozzle whose gas flow capacity can be widely controlled by varying the size of the flow channels and flow holes without requiring changes to the external shape of the nozzle.

[0022] The fluidizing gas nozzle and the method are characterized by what is stated in the independent claims. Some other embodiments are characterized by what is stated in the other claims. Embodiments of the invention are also disclosed in the description and drawings of the present patent application. The invention content of the present patent application may also be defined in other ways than those defined in the following claims. The content of the invention may also be formed by several separate inventions, especially if the invention is examined in terms of expressed or implicit subtasks or in view of the benefits or groups of benefits obtained. Some of the definitions contained in the following claims may be unnecessary in view of the separate invention concepts. The features of different embodiments of the invention may be applied to other embodiments within the scope of the basic invention idea.

[0023] Various embodiments of the fluidizing gas nozzle and / or the method may include at least one feature from the following paragraphs:

[0024] In one embodiment, the outer circumference of the nozzle inlet tube is circular.

[0025] The advantage is that the shape is simple to manufacture, allows the fluidized bed material to flow similarly through the tube in all directions, and distributes the gas flow evenly in all directions around the nozzle.

[0026] In one embodiment, the flow area of ​​the nozzle inlet tube is circular.

[0027] The advantage is that this shape is simple to manufacture and efficiently conveys airflow.

[0028] In one embodiment, the nozzle cover includes a cover wall defining an outer circumference of the cover, the outer circumference being larger than an outer circumference of the inlet tube, and the plurality of flow channels are arranged around the second inlet tube end.

[0029] An advantage is that an equal air flow in all directions around the nozzle can be achieved.

[0030] In one embodiment, all flow channels have the same shape and size.

[0031] An advantage is that a nozzle structure with low manufacturing costs can be achieved.

[0032] In one embodiment, the flow area of ​​the flow channel is sector-shaped.

[0033] An advantage is that the combined flow area of ​​the flow channels in the circular nozzle cover arranged around the circular first end of the flow channels can be maximized and a uniform distribution of the air flow in all directions around the nozzle can be achieved.

[0034] In one embodiment, the cover wall has a constant length around its entire circumference.

[0035] An advantage is that a simple structure of the nozzle can be achieved.

[0036] In one embodiment, the cover wall has a wave shape in its lower end arranged toward the first inlet pipe end, the wave shape having wave troughs extending toward the first end of the flow channel and wave crests therebetween, and the open second end is aligned with the wave troughs.

[0037] An advantage is that local agglomeration of the fluidizing gas in the vicinity of the open second end can be reduced, ie the generation of large gas bubbles can be avoided.

[0038] In one embodiment, the flow holes are circular.

[0039] The advantage is that it is simple to manufacture and delivers airflow efficiently.

[0040] In one embodiment, the number of flow holes is the same as the number of flow channels, such that one flow hole is connected to one flow channel.

[0041] The advantage is that the structure is simple to manufacture.

[0042] In one embodiment, all flow holes have the same shape and size.

[0043] The advantage is that the structure is simple to manufacture and the same air flow can be fed into all flow channels.

[0044] In one embodiment, the gas nozzle is formed as a single piece, for example from a metal casting.

[0045] The advantage is that a structure can be obtained which can withstand the very high temperatures occurring in a fluidized bed.

[0046] In one embodiment, the flow holes and the flow channel (5) are sized such that the gas exit velocity at the second end of the flow channel is in the range of 5 m / s - 30 m / s.

[0047] The advantage is that a fluidized bed with high performance can be obtained.

[0048] In one embodiment, in the method for manufacturing the fluidizing gas nozzle, a set of inserts is provided, which are shaped parts that shape the flow channel and the flow holes, wherein the flow channel is arranged next to the end of the second inlet pipe, wherein the inserts are solid parts of ceramic material.

[0049] The advantage is that a simple method for producing precise shapes of flow channels and flow holes can be achieved. In addition, the insert can be reused, which is advantageous in terms of cost-effectiveness and the environment. Furthermore, using the insert, a very smooth surface roughness of the flow channels and flow holes can be achieved.

[0050] In one embodiment, a method for manufacturing the fluidizing gas nozzle includes heating the cast product to expand it prior to removing the insert.

[0051] An advantage is that the insert can be removed from the cast product more easily without damage and thus the reuse of the insert can be simplified.

[0052] In one embodiment, the method includes manufacturing at least two nozzles having the same external nozzle dimensions but different flow areas in the flow channels and / or flow through holes by using inserts of different dimensions.

[0053] The advantage is that even when nozzles with different capacities are manufactured, the same mold piece for forming the outer shape of the nozzle can be utilized. Thus, a cost-effective and environmentally friendly manufacturing process can be achieved.

[0054] In one embodiment, the method includes providing a nozzle inlet tube and a nozzle cover as separate components, and changing the flow area of ​​the flow channel by changing the radial dimension and / or the circumferential dimension of the flow channel, thereby producing at least two nozzles having the same external nozzle dimensions but different flow areas in the flow channel.

[0055] The advantage is that a simple method can be realized for producing a nozzle suitable for lower temperatures, for example for cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Some embodiments of the present disclosure are described in more detail in the accompanying drawings, wherein

[0057] Figure 1 is a schematic side view of a partly cross-section of a fluidized bed apparatus including a fluidizing gas nozzle,

[0058] Figure 2 is a schematic diagram of the fluidizing gas nozzle,

[0059] Figure 3 is a schematic side view of a partial cross section of a fluidizing gas nozzle,

[0060] Figure 4 is a schematic top view of a partial cross section of a fluidizing gas nozzle,

[0061] Figure 5 is a schematic side view of a fluidizing gas nozzle,

[0062] Figure 6 is a schematic diagram of the embedded part.

[0063] Figure 7 A method for manufacturing a fluidizing gas nozzle is shown, and

[0064] Figure 8 Another method for making a fluidizing gas nozzle is shown.

[0065] In the accompanying drawings, some embodiments are simplified for clarity. In the accompanying drawings, similar components are represented by the same reference numerals. DETAILED DESCRIPTION

[0066] Figure 1 is a schematic side view, partly in cross section, of a fluidized bed apparatus including a fluidizing gas nozzle.

[0067] In this specification, fluidized bed equipment refers to all equipment that forms a fluidized bed. Some examples of fluidized bed equipment are fluidized bed reactors, fluidized bed furnaces, fluidized bed coolers, and fluidized bed seal tanks.

[0068] The working principle of the fluidized bed reactor 15 may be a so-called bubbling fluidized bed or circulating fluidized bed principle. In the fluidized bed reactor 15, a fluidizing gas (e.g., air A) is supplied to the reactor through a bed material (not shown) mainly comprising sand and fuel, so that the bed becomes a fluidized state that is easy to move. The fluidizing gas may also be another gas or a gas mixture such as air, e.g., nitrogen, or a mixture of air and another gas, such as a recycle gas, etc.

[0069] The fluidized bed reactor 15 includes a plurality of fluidizing gas nozzles 100, which supply and distribute the fluidizing gas in the fluidized bed reactor. The number of nozzles depends on, for example, the size and capacity of the fluidized bed reactor. Typically, several dozen gas nozzles 100 are arranged in the fluidized bed reactor.

[0070] The fluidizing nozzle 100 has a "mushroom-like" shape, including a nozzle inlet tube and a nozzle cover, which will be described in more detail later in this specification.

[0071] The fluidizing gas nozzle 100 is fixedly mounted to the base 20. In one embodiment, the base 20 forms the bottom of the fluidized bed reactor. In one embodiment, the fluidizing gas nozzle 100 is welded to the base 20. In one embodiment, the fluidizing gas nozzle 100 is attached to the base 20 by fastening means, such as screws or bolts.

[0072] In one embodiment, for example, Figure 1 As shown, there is a gas chamber 19 below the susceptor 20. A nozzle inlet pipe is connected to the gas chamber. Gas is first introduced into the gas chamber 19 and then passes through the fluidizing gas nozzle 100 in the fluidized bed reactor.

[0073] In one embodiment, the fluidized bed reactor is a furnace for burning a fuel.The furnace may comprise gas openings above the bed for feeding secondary air and optionally even higher order air into the furnace.

[0074] Figure 2 Schematic diagram of a fluidizing gas nozzle. The nozzle 100 comprises a nozzle inlet pipe 1 and a nozzle cover 2.

[0075] In one embodiment, the nozzle inlet pipe 1 and the nozzle cover 2 both have a cylindrical outer shape, so that their outer circumference is circular. However, this is not required. For example, the nozzle inlet pipe and / or the nozzle cover may have a tapered or conical outer shape, and their outer circumference may be, for example, polygonal or elliptical.

[0076] The nozzle cover 2 includes a cover wall ( Figure 3 ), which defines an outer circumference OC of the cover measured at the lower end 9 of the nozzle cover, the lower end being the end on the side of the first inlet pipe end 3. The outer circumference OC is larger than the outer circumference OP of the inlet pipe. This means that in an embodiment where the nozzle cover and the inlet pipe are circular, the outer diameter DC of the cover measured at the lower end 9 is larger than the outer diameter DP of the inlet pipe.

[0077] In one embodiment, cover wall 12 has a constant length LC around its entire circumference.

[0078] In one embodiment, the first inlet pipe end 3 of the nozzle inlet pipe is provided with an attachment feature or element that helps or facilitates the attachment of the nozzle to the furnace. The feature or element may include an attachment hole, a mounting flange, or the like.

[0079] In one embodiment, the fluidizing gas nozzle 100 is formed as a single piece. In one embodiment, the single piece structure is manufactured by casting.

[0080] Figure 3is a schematic side view of a partial cross section of a fluidizing gas nozzle. The fluidizing gas nozzle 100 comprises a nozzle inlet pipe 1 and a nozzle cover 2. In one embodiment, such as shown in the drawings, the nozzle inlet pipe 1 and the nozzle cover 2 are arranged concentrically.

[0081] The nozzle inlet pipe 1 includes a first inlet pipe end 3 arranged outside the nozzle cover 2 and a second inlet pipe end 4 arranged inside the nozzle cover 2 .

[0082] In one embodiment, the flow area 11 of the nozzle inlet tube is round, straight, and has a constant diameter. However, there may be variations in these features: for example, the flow area may have a polygonal cross-sectional shape, the diameter or cross-sectional area may vary, etc.

[0083] The nozzle cover 2 comprises at least two flow channels 5 which are arranged alongside the second inlet pipe end 4. According to one aspect, the number of the flow channels 5 is selected in the range of 2-14 and they are arranged around the second inlet pipe end 4.

[0084] The flow channel 5 comprises a closed first end 6 and an open second end 7 opposite to the first end. The closed first end 6 is connected to the second inlet pipe end 4 of the nozzle inlet pipe via at least one flow hole 8. In one embodiment, each flow channel 5 has one flow hole 8. In other words, the number of flow holes 8 is the same as the number of flow channels 5, so that one flow hole 8 is connected to one flow channel 5. Preferably, all flow holes 8 have the same shape and size.

[0085] In one embodiment, the flow holes 8 are circular. In one embodiment, the flow holes 8 are polygonal. In one embodiment, the flow holes 8 have an elliptical shape.

[0086] The shape of the flow channel 5 can be realized in many ways. In one embodiment, the flow area of ​​the flow channel 5 is circular. In one embodiment, the flow area of ​​the flow channel 5 is polygonal. In one embodiment, for example Figure 4 As shown, the flow area of ​​the flow channel 5 is sector-shaped. In one embodiment, the flow area of ​​the flow channel 5 has a constant cross-sectional shape and area.

[0087] In one embodiment, for example, Figure 3 As shown, the flow channel 5 is parallel to the nozzle inlet tube 1. However, this is not always the case. In one embodiment, the flow channel is expanded so that the distance between the second end 7 of the flow channel and the centerline X of the nozzle is greater than the distance between the first end 6 and the centerline X of the nozzle.

[0088] The open second end 7 is arranged to be open in the direction of the first inlet pipe end 3. Thus, a gas flow path A is provided, in which the gas enters the first inlet pipe end 3, flows in a first direction from the first end toward the second inlet pipe end 4, reaches the first end 6 of the flow channel through the flow hole 8, and then reaches the open second end 7 through the flow channel 5 in a second direction (i.e., a direction at least substantially opposite to the first direction) and flows out of the nozzle 100.

[0089] The gas leaving the nozzle 100 should have a desired nozzle exit velocity. According to one aspect, the exit velocity is in the range of 5m / s-30m / s (meters per second). In the nozzle 100, the most important features defining the exit velocity are the flow area of ​​the flow holes 8 and the flow area of ​​the flow channel 5.

[0090] In one embodiment, the nozzle cover 2 comprises a cover wall 12 defining an outer circumference OC of the cover. The cover wall 12 may have a constant thickness across the flow channel 5, or alternatively, the thickness may vary. In one embodiment, the thickness varies such that it has a maximum value at the first end 6 of the flow channel and a minimum value at the second end 7 of the flow channel.

[0091] Figure 4 is a schematic top view of a partial cross section of a fluidizing gas nozzle. This embodiment comprises four flow channels 5 arranged around the second inlet pipe end 4. All flow channels 5 have the same shape and size. The flow area of ​​the flow channels 5 is sector-shaped. Dividing walls 14 are arranged between the flow channels.

[0092] According to one aspect, the flow area of ​​the flow channel 5 can be selected independently of the outer diameter DC of the cover. In other words, the dimension C in the circumferential direction and the dimension R in the radial direction of the nozzle cover can be selected as desired without changing the outer diameter DC of the cover. Since the size of the flow hole 8 can also be selected independently of the outer diameter DC of the cover, it is possible to manufacture nozzles 100 having the same outer dimensions but changing their air flow capacity and thereby changing the nozzle outlet velocity.

[0093] Figure 5 is a schematic side view of a fluidizing gas nozzle. In one embodiment, the length LC of the cover wall 12 is not constant, but varies in a determined manner. In one embodiment, the cover wall 12 has a wave shape at its lower end 9 (i.e., the end on the side of the first inlet pipe end 3). The wave shape has a trough 16 extending toward the first end 6 of the flow channel and a wave crest 17 arranged between the troughs. In one embodiment, for example, Figure 5 As shown, the open second end 7 of the flow channel is aligned with the wave valley 16 .

[0094] As mentioned before, the nozzle cover 2 may have a tapered or conical outer shape. Figure 5 An embodiment is shown in which the diameter of the nozzle cover 2 has its maximum value at its lower end 13 (i.e. at the end closer to the first inlet pipe end). It should be noted that, of course, the tapered or conical outer shape can also exist in embodiments in which the length LC of the cover wall 12 is constant; and embodiments in which the outer shape is cylindrical can exist with a cover wall of varying length LC.

[0095] Figure 6 1 is a schematic diagram of an insert. According to one aspect, the fluidizing gas nozzle 100 is manufactured as a single piece by casting. In one embodiment, the flow channels 5 and the flow holes 8 are formed with inserts 18. The inserts 18 are formed solid pieces that are usually made of ceramic material. The number of inserts 18 in the casting mold corresponds to the number of flow channels 5.

[0096] In one embodiment, the insert 18 includes a flow channel portion that shapes the flow channel, a flow hole portion 22 that shapes the flow hole connected to the flow channel, and a base portion 23, which can shape at least a portion of the lower end of the nozzle cover and / or serve as a base for grasping or grabbing when the insert must be removed from the cast product.

[0097] In one embodiment, the nozzle inlet tube 11 is also formed with one or more inserts. However, the flow area is usually formed by using a core made of, for example, bonded sand.

[0098] Figure 7 A method for manufacturing fluidizing gas nozzles is shown. Before implementing the method, the desired gas volume flow rate for each nozzle is defined. The desired gas volume flow rate depends mainly on the characteristics of the fluidized bed reactor and the fuel to be burned therein. Based on the desired gas volume flow rate, elements or devices such as inserts are defined and their dimensions are locked (closed).

[0099] According to one aspect, the fluidizing gas nozzle 100 is manufactured by casting. The method comprises providing 200 a mold piece which shapes the outer shape of the nozzle, i.e. the outer surface of the nozzle inlet pipe 1 and the nozzle cover 2. The mold piece can be made of a material such as metal, ceramic, etc., which can withstand the temperatures reached in casting. Preferably, the mold pieces are reusable, i.e. they can be reused in several molding processes.

[0100] The method comprises providing 201 a set of inserts 18 , as already described in this specification, which are shaped parts that shape the flow channel 5 and the flow holes 8 , the flow channel being arranged next to the second inlet pipe end 4 .

[0101] The method comprises providing 202 a core that shapes the inner shape of the nozzle inflow tube. In one embodiment, the core comprises at least one insert. In one embodiment, the core is made of bonded sand.

[0102] The method includes assembling 203 a mold by using the mold pieces, the insert pieces, and the core pieces.

[0103] The mold is filled 204 with molten metal. The metal is allowed to solidify 205, i.e., it is allowed to cool.

[0104] After the metal solidifies, the mold is disassembled 206. This includes removing the inserts and core pieces and releasing the cast product including the nozzle inlet tube 1 and the nozzle cover 2 from the mold.

[0105] In one embodiment, releasing the cast product includes heating 206a the cast product so that the cast product expands due to thermal expansion, which simplifies removing the insert.

[0106] In one embodiment, the insert is at least partially fractured to simplify removal of the insert from the cast product.

[0107] The method optionally includes performing a finishing process 207 on the cast product for finishing the gas nozzle. The finishing process may include, for example, grinding, sandblasting, cutting or any known finishing process.

[0108] In one embodiment, at least two fluidizing gas nozzles 100 are manufactured, which have the same external nozzle dimensions, but have different flow areas in the flow channel 5 and / or flow holes 8. This is achieved by using exactly the same mold piece that forms the external shape of the nozzle, but using inserts of different dimensions. In one embodiment, by using a different radial dimension R of the flow channel 5 (see Figure 4 ) insert to change the flow area of ​​the flow channel 5. In one embodiment, by using a circumferential dimension C (see Figure 4 ) insert to change the flow area of ​​the flow channel 5.

[0109] Figure 8 Another method for manufacturing a fluidizing gas nozzle is shown. In the method, 250 the nozzle inlet pipe 1 and the nozzle cover 2 are provided as separate components. For example, the separate components can be manufactured by casting, machining, assembling together to one or more sub-components, etc. 251 The flow hole 8 is manufactured at the second inlet end 4 of the nozzle inlet pipe, for example by machining (e.g., by drilling).

[0110] 252 attaches the nozzle inlet tube 1 to the nozzle cover 2 so that the flow hole 8 connects the flow channel 5 to the second inlet end 4. In one embodiment, welding is used to attach the nozzle inlet tube to the nozzle cover. In one embodiment, it uses a fastening device such as a screw or a bolt.

[0111] Then, 253, an optional finishing process is performed on the cast product for finishing the gas nozzle.

[0112] In one embodiment, at least two fluidizing gas nozzles 100 are manufactured, having the same external nozzle dimensions, but having different flow areas in the flow channel 5 and / or flow holes 8. In one embodiment, this is achieved by varying the flow area of ​​the flow channel by varying the radial dimension R and / or the circumferential dimension C without varying the external dimensions of the nozzle cover and selecting the dimensions of the flow holes accordingly, so as to achieve the desired nozzle gas exit velocity.

[0113] The utility model is not limited to the above-mentioned embodiments, but on the contrary, many variations are possible within the scope of the utility model concept defined by the appended claims. Within the scope of the utility model concept, the characteristics of different embodiments and applications can be used in combination or in place of the characteristics of another embodiment or application.

[0114] The drawings and the related description are intended only to illustrate the idea of ​​the present invention. The present invention can be modified in detail within the scope of the idea of ​​the present invention as defined in the appended claims.

[0115] Reference numerals

[0116] 1 Nozzle inlet pipe

[0117] 2 Nozzle Covers

[0118] 3. End of the first inlet pipe

[0119] 4 Second inlet pipe end

[0120] 5 Flow channels

[0121] 6 First end of the flow channel

[0122] 7 Second end of the flow channel

[0123] 8 Flow holes

[0124] 9 End of cover wall

[0125] 10 Nozzle flows into the outer surface of the pipe

[0126] 11 Flow area of ​​nozzle inlet pipe

[0127] 12 Cover the wall

[0128] 13 Lower end of nozzle cover

[0129] 14 Partition wall

[0130] 15 Fluidized Bed Reactor

[0131] 16 Trough

[0132] 17 Crest

[0133] 18 Inserts

[0134] 19 Gas Chamber

[0135] 20 base

[0136] 21 Flow channel part

[0137] 22 Flow hole part

[0138] 23 base part

[0139] 100 Fluidizing gas nozzle

[0140] 200 Methods and Steps

[0141] A Gas flow path

[0142] C Circumference

[0143] DC cover outer diameter

[0144] DP Inlet pipe outer diameter

[0145] LC cover wall length

[0146] OC cover outer circumference

[0147] OP Outer circumference of the inlet pipe

[0148] R Radial size

[0149] X Center Line

Claims

1. A fluidizing gas nozzle (100), characterized in that: include The nozzle flows into the pipe (1), and The nozzle cover (2) includes: The nozzle inflow pipe (1) comprises: a first inlet pipe end (3), which is arranged outside the nozzle cover, and A second inlet pipe end (4), which is arranged inside the nozzle cover (2), wherein: The nozzle cover (2) comprises: A plurality of flow channels (5), the plurality of flow channels being arranged beside the second inlet pipe end (4), the flow channels (5) having: a closed first end (6), and an open second end (7) opposite to the first end, The closed first end (6) is connected to the second inlet pipe end (4) via a flow hole (8), and The open second end (7) is open toward a lower end (13) of the nozzle cover which is open in the direction of the first inlet pipe end (3), The following gas flow path (A) is provided: - along a first direction from a first end of the nozzle inflow tube to a second end of the nozzle inflow tube, - through the flow hole, and then - passing through the flow channel in a second direction at least opposite to the first direction, from a first end of the flow channel to an open second end.

2. The fluidizing gas nozzle according to claim 1, characterized in that - The outer circumference (10) of the nozzle inlet pipe is circular.

3. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: - The flow area (11) of the nozzle inlet pipe is circular.

4. The fluidizing gas nozzle according to claim 1, characterized in that - the nozzle cover (2) comprises a cover wall (12) defining an outer circumference (OC) of the nozzle cover, the outer circumference of the nozzle cover being larger than the outer circumference (OP) of the nozzle inlet pipe.

5. The fluidizing gas nozzle according to claim 1, characterized in that The plurality of flow channels (5) are arranged around the second inlet pipe end (4).

6. The fluidizing gas nozzle according to claim 1, characterized in that - All said flow channels (5) have the same shape and size.

7. The fluidizing gas nozzle according to claim 1, characterized in that - The flow area of ​​the flow channel (5) is sector-shaped.

8. The fluidizing gas nozzle according to claim 4, characterized in that - The cover wall (12) has a constant length (LC) around its entire circumference.

9. The fluidizing gas nozzle according to claim 4, characterized in that the cover wall (12) has a wave shape in its lower end (9) facing the first inlet pipe end (3), the wave shape having wave troughs (16) extending toward the first end (6) of the flow channel and wave peaks (17) located therebetween, and wherein - the open second end (7) is aligned with the wave valley (16).

10. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: The flow hole (8) is circular.

11. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: The number of the flow holes (8) is the same as the number of the flow channels (5), so that one flow hole (8) is connected to one flow channel (5).

12. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: - All of the flow holes (8) have the same shape and size.

13. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: - The gas nozzle is formed in one piece.

14. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: - The gas nozzle is made of metal casting.

15. The fluidizing gas nozzle according to claim 1 or 2, characterized in that: The dimensions of the flow holes (8) and the flow channel (5) are designed so that the gas exit velocity at the second end of the flow channel is in the range of 5 m / s - 30 m / s.

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