CN113019724A - Nozzle device and control method of nozzle head assembly size - Google Patents
Nozzle device and control method of nozzle head assembly size Download PDFInfo
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- CN113019724A CN113019724A CN202110190394.1A CN202110190394A CN113019724A CN 113019724 A CN113019724 A CN 113019724A CN 202110190394 A CN202110190394 A CN 202110190394A CN 113019724 A CN113019724 A CN 113019724A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
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Abstract
The invention provides a nozzle device and a control method of the assembly size of a nozzle head, wherein a nozzle comprises an inner pipe, an outer pipe, an inner spray head, an outer spray head, a positioning block, a connecting flange, a sealing flange and an elastic adjusting mechanism; the inner pipe and the inner spray head are arranged inside the outer pipe and the outer spray head, and a shaft shoulder is processed on the inner pipe; one end of the positioning block is welded on the outer wall surface of the inner spray head, and the other end of the positioning block is lapped on the positioning end surface of the outer spray head; the elastic adjusting mechanism is axially arranged in a cavity formed by the inner pipe and the outer pipe, one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange, the other end of the elastic adjusting mechanism is supported on a shaft shoulder of the inner pipe, downward axial elastic force is applied to the shaft shoulder, and the positioning block is driven to press the outer spray nozzle. According to the nozzle device and the control method, the spring element is arranged in the nozzle, the expansion amount or the contraction amount of each channel pipeline is compensated through the deformation amount of the spring element, the assembling ruler of the nozzle head is ensured by using the elastic force, and the spring element can be adjusted according to the requirement, so that the requirements of various different operating conditions can be met.
Description
Technical Field
The invention belongs to the technical field of energy chemical industry, and particularly relates to a nozzle device and a control method of nozzle head assembly size.
Background
The process burner (nozzle) is the core equipment of the processes of water coal (coke) slurry/multi-element slurry gasification, pulverized coal gasification, residual oil gasification and natural gas conversion, and the performance of the process burner directly influences the operation effect of the gasification (conversion) process.
Taking the currently commonly used Texaco (GE) gasification process burner as an example, the burner is formed by coaxially sleeving three layers of pipes and a nozzle from inside to outside, and the sleeves of the layers are connected with each other through a flange welded at the tail part. The size of the head of the burner is the core of the whole burner, the annular gap between the middle nozzle and the outer nozzle, and the retraction depth deviation of the middle nozzle or the inner nozzle are generally required to be controlled to be +/-0.1 mm as much as possible, but the overall length of the burner is 3-4 m, so that the very high requirement on the machining and assembling precision is provided. In the actual use process, because the high-temperature synthesis gas is arranged on the outer side of the outer pipe of the burner, the outer pipe is usually subjected to thermal expansion, so that the assembly size of the head of the burner is changed, and the problems of inconsistency of operation data with a design value, partial jetting of the burner, pressure difference fluctuation and the like are caused. To avoid these problems, some pulverized coal burners use bellows to compensate for the amount of deformation caused by changes in the duct temperature. But due to the limitations of the bellows structure, the strength is low, the use temperature and pressure are limited, the service life is short, and the adjustment amount is limited.
The invention patent with the application number of 200910023770.7 discloses a structure for compensating deformation of a burner due to thermal expansion, wherein an air interlayer is added between a burner cooling water system and a burner material supply system to realize independent expansion of a cooling water pipe and a material pipe, and although the deformation caused by temperature difference can be compensated, an additional pipeline is required to be added, so that the structure of the burner becomes more complicated; and each layer of channel becomes difficult after the nozzle head connects into a whole for the dismantlement of each layer of channel of nozzle becomes, when the inlayer passageway need be overhauld, must cut the outside passageway earlier, is unfavorable for nozzle maintenance work.
Disclosure of Invention
The present inventors have made intensive studies in order to overcome the disadvantages of the prior art, and have provided a nozzle device with an elastic adjustment mechanism and a method for controlling the nozzle head assembly size, in which a spring member is built in a nozzle, the expansion amount or the contraction amount of each channel pipe is compensated by the deformation amount of the spring member, and the nozzle head assembly size is secured by using an elastic force, thereby completing the present invention.
The technical scheme provided by the invention is as follows:
in a first aspect, a nozzle device comprises an inner pipe, an outer pipe, an inner spray head, an outer spray head, a positioning block, a connecting flange, a sealing flange and an elastic adjusting mechanism;
the lower end of the outer pipe is connected with the outer spray head, the top end of the outer pipe is connected with the connecting flange, and the side wall of the outer pipe is provided with an outer ring medium inlet flange; the lower end of the inner pipe is connected with the inner spray head, the top end of the inner pipe is provided with a central medium inlet flange, and the upper part of the inner pipe, which is close to the connecting flange, is provided with a shaft shoulder; the inner pipe and the inner nozzle are arranged inside the outer pipe and the outer nozzle, and the connecting flange is matched with the sealing flange to seal the top end of the outer pipe;
the inner profile of the outer nozzle is in a convex structure, wherein the section with the larger inner diameter is in a cylindrical structure, the section with the smaller inner diameter is in a contracted conical structure, and a positioning end surface vertical to the central shaft is formed at the sudden change position of the inner diameter; one end of the positioning block is welded on the outer wall surface of the inner spray head, and the other end of the positioning block is lapped on the positioning end surface of the outer spray head, so that the inner spray head and the outer spray head are limited in the axial direction and the radial direction;
the elastic adjusting mechanism is axially arranged in a cavity formed by the inner pipe and the outer pipe, one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange, the other end of the elastic adjusting mechanism is supported on a shaft shoulder of the inner pipe, downward axial elastic force is applied to the shaft shoulder, and the positioning block is driven to press the outer spray nozzle.
In a second aspect, a method of controlling the assembly size of a nozzle head, the nozzle comprising an inner tube, an outer tube, an inner spray head, an outer spray head, a connecting flange and a sealing flange; the lower end of the outer pipe is connected with the outer spray head, the top end of the outer pipe is connected with the connecting flange, and the side wall of the outer pipe is provided with an outer ring medium inlet flange; the lower end of the inner pipe is connected with the inner spray head, and the top end of the inner pipe is provided with a central medium inlet flange; the inner pipe and the inner nozzle are arranged inside the outer pipe and the outer nozzle, and the connecting flange is matched with the sealing flange to seal the top end of the outer pipe; the control method comprises the following steps:
a sealing element is arranged between the inner pipe and the sealing flange;
processing the inner profile of the outer nozzle into a convex structure, wherein the section with larger inner diameter is of a cylindrical structure, the section with smaller inner diameter is of a contracted conical structure, and a positioning end surface vertical to a central shaft is formed at the sudden change position of the inner diameter; welding one end of a positioning block on the outer wall surface of the inner spray head, and lapping the other end of the positioning block on the positioning end surface of the outer spray head, so as to limit the inner spray head and the outer spray head in the axial direction and the radial direction;
an elastic adjusting mechanism is arranged in a cavity formed by the inner pipe and the outer pipe, a shaft shoulder is processed at the upper part of the inner pipe close to the connecting flange, one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange, the other end of the elastic adjusting mechanism is supported on the shaft shoulder of the inner pipe, the elastic adjusting mechanism is adjusted to apply axial elastic force to the shaft shoulder all the time, and the axial elastic force is transmitted through the shaft shoulder → the inner pipe → the inner spray head → the positioning block → the outer spray head in sequence, so that the positioning block is pressed against the positioning end face of the outer spray head, and the assembling.
According to the nozzle device and the control method of the nozzle head assembly size provided by the invention, the following beneficial effects are achieved:
(1) the nozzle device compensates the expansion amount or the contraction amount of each channel pipeline through the deformation amount of the spring element, and has a simple structure; the spring element can be adjusted according to the requirement, and the requirements of various different operating conditions can be met; and the channels of each layer are connected through flanges, can be independently disassembled, and are convenient to overhaul and maintain;
(2) according to the nozzle device, the nozzle head assembly size is ensured by using the elastic force, the requirement on processing and assembly is low, the head assembly size cannot be changed in the using process, and the nozzle is more stable in operation;
(3) according to the nozzle device, the spring element can counteract axial stress of the inner pipe center medium inlet flange caused by partial piping, so that damage to the nozzle caused by overlarge piping stress is avoided;
(4) the nozzle device has wide application range, and can be used for the technical processes of water coal (coke) slurry/multi-element slurry gasification, pulverized coal gasification, residual oil gasification, natural gas conversion, three-waste (waste liquid, waste gas and waste solid) treatment and the like.
Drawings
FIG. 1 is a schematic structural view of a nozzle device according to the present invention;
FIG. 2 is a cross-sectional view of a locating block of the present invention;
FIG. 3 is a schematic view of the support plate of the present invention, (a) is a schematic view showing the support plate with 2 holes uniformly added around the central axis; (b) the structure of the supporting plate is shown with 3 holes uniformly added around the central axis; (c) the structure diagram shows that 4 small holes are uniformly added on the support plate around the central shaft; (d) the structure of the support plate is shown with 6 holes uniformly added around the central axis.
Description of the reference numerals
1-a central media inlet flange; 2-sealing the flange; 3-a connecting flange; 4-inner tube; 5-an outer tube; 6-inner spray head; 7-positioning blocks; 8-outer spray head; 9-a seal; 10-a spring element; 11-a support plate; 12-a guide bar; 13-shaft shoulder; 14-outer ring media inlet flange.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
According to a first aspect of the present invention, there is provided a nozzle device with an elastic adjustment mechanism, as shown in fig. 1, comprising an inner tube 4, an outer tube 5, an inner nozzle 6, an outer nozzle 8, a positioning block 7, a connecting flange 3, a sealing flange 2 and an elastic adjustment mechanism;
the lower end of the outer pipe 5 is connected with an outer spray head 8, the top end of the outer pipe is connected with a connecting flange 3, and the side wall of the outer pipe is provided with an outer ring medium inlet flange 14; the lower end of the inner pipe 4 is connected with the inner spray head 6, the top end is provided with a central medium inlet flange 1, and the upper part of the inner pipe close to the connecting flange 3 is provided with a shaft shoulder 13; the inner pipe 4 and the inner spray head 6 are arranged inside the outer pipe 5 and the outer spray head 8, the connecting flange 3 is matched with the sealing flange 2, and the top end of the outer pipe 5 is sealed;
the inner profile of the outer nozzle 8 is in a convex structure, wherein the section with the larger inner diameter is in a cylindrical structure, the section with the smaller inner diameter is in a contracted conical structure, and a positioning end surface vertical to the central shaft is formed at the sudden change position of the inner diameter; one end of the positioning block 7 is welded on the outer wall surface of the inner spray head 6, and the other end is lapped on the positioning end surface of the outer spray head 8, so that the inner spray head 6 and the outer spray head 8 are limited in the axial direction and the radial direction;
the elastic adjusting mechanism is axially arranged in a cavity formed by the inner pipe 4 and the outer pipe 5, one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange 2, the other end of the elastic adjusting mechanism is supported on a shaft shoulder 13 of the inner pipe, downward axial elastic force is applied to the shaft shoulder 13, the positioning block 7 is driven to press the outer spray head 8, and the assembling size of the head of the spray nozzle is not changed.
In a preferred embodiment of the invention, a seal 9 is arranged between the inner tube 4 and the sealing flange 2; the seal 9 is a reciprocating type dynamic seal, since there will be relative axial movement between the inner tube 4 and the sealing flange 2 during use.
In a preferred embodiment of the present invention, the inner pipe 4, the outer pipe 5, the inner nozzle 6, the outer nozzle 8, the elastic adjustment mechanism and the sealing member 9 are coaxial.
In a preferred embodiment of the invention, the outlet section of the inner nozzle 6 is of a convergent cone structure; the outer wall surface of the inner spray head 6 is uniformly provided with M positioning blocks 7 around a central shaft, wherein M is more than or equal to 3, the positioning blocks 7 are in a wedge shape facing the flow direction, the back flow direction is a straight surface, and the lower end surface shown in figure 2 is a straight surface; the M evenly distributed positioning blocks 7 are mutually matched with the inner arc surface of the section with the larger inner diameter of the outer spray head 8 in the circumferential direction through the outer arc surface, and are mutually matched with the positioning end surface of the outer spray head 8 in the axis direction through the straight surface.
In a preferred embodiment of the present invention, the elasticity adjusting device comprises spring elements 10, guide rods 12 and support plates 11, wherein the guide rods 12 and the spring elements 10 share N groups and are uniformly arranged around a central shaft, and N small holes, N is more than or equal to 2, are uniformly added around the central shaft in the corresponding support plates 11, as shown in fig. 3; one end of the guide rod 12 is fixed on the inner end face of the sealing flange 2, and the other end of the guide rod penetrates through the small hole in the support plate 11 to be a free end; the spring element 10 is sleeved outside the guide rod 12, and two ends of the spring element are respectively supported on the end surfaces of the sealing flange 2 and the supporting plate 11; the lower end face of the support plate 11 is supported on a shoulder 13 of the inner tube 4.
The installed spring element 10 is always in a compressed state, the positioning end faces of the positioning block 7 and the outer spray head 8 are pressed tightly by axial elastic force, and the interaction force on the contact faces is larger than zero.
In a preferred embodiment of the present invention, in order to prolong the service life of the nozzle, the nozzle device with the elastic adjustment mechanism provided by the present invention is provided with a cooling water protection device at the outer side of the outer tube 5 and the outer nozzle 8, for cooling the outer tube 5 and the outer nozzle 8; the cooling water protection device may be a water jacket or coil type cooling.
In a preferred embodiment of the present invention, the nozzle device with the elastic adjustment mechanism provided by the present invention can be used in processes such as water coal (coke) slurry/multi-slurry gasification, pulverized coal gasification, residual oil gasification, natural gas conversion, and three-waste (waste liquid, waste gas, waste solid) treatment. The central medium introduced into the central medium inlet flange 1 can be gas such as natural gas, coke oven gas, water vapor, chemical waste gas and the like, or liquid such as water-coal-coke slurry, residual oil, water, multicomponent slurry, organic waste liquid, chemical waste water and the like, or solid such as flowing coal powder and the like. The outer ring medium introduced into the outer ring medium inlet flange 14 is oxygen, air, natural gas, synthetic gas, steam and other gases. Specifically, the method comprises the following steps:
when the device is applied to the water-coal-coke slurry/multi-component slurry gasification process, the central medium inlet flange 1 supplies water-coal-coke slurry/multi-component slurry, and the outer ring medium inlet flange 14 supplies oxygen; or when the invention is only used for the atomization of the coal water slurry, the central medium inlet flange 1 feeds the coal water slurry, and the outer ring medium inlet flange 14 feeds the synthesis gas;
when the device is applied to a pulverized coal gasification process, the central medium inlet flange 1 supplies carbon dioxide or pulverized coal conveyed by nitrogen, and the outer ring medium inlet flange 14 supplies oxygen and water vapor;
when the device is applied to a residual oil gasification process, the central medium inlet flange 1 is used for supplying residual oil and water, and the outer ring medium inlet flange 14 is used for supplying oxygen;
when the device is applied to a natural gas conversion process, the central medium inlet flange 1 supplies natural gas and water vapor, and the outer ring medium inlet flange 14 supplies oxygen and water vapor; or the central medium inlet flange 1 is supplied with oxygen + water vapor, and the outer ring medium inlet flange 14 is supplied with natural gas + water vapor.
The main working process of the invention is as follows:
after assembly, the spring element is in a compressed state, and the elastic force in the axial direction is transmitted sequentially through the support plate → the shaft shoulder → the inner pipe → the inner spray head → the positioning block → the outer spray head, so that the positioning block is pressed against the positioning end face of the outer spray head. Therefore, during machining, the axial relative position of the inner spray head and the outer spray head is adjusted only by properly turning the flat end face of the positioning block, and the assembling size of the nozzle head can be ensured.
When the nozzle head assembly is in work, when the thermal expansion amount of the outer pipe is larger than that of the inner pipe, the sealing flange moves upwards relative to the inner pipe, the axial distance between the shaft shoulder of the inner pipe and the sealing flange is increased, the compression amount of the spring element is reduced, but the elastic force is still larger than zero, and the positioning block and the positioning end face of the outer nozzle can still be pressed tightly, so that the assembly size of the nozzle head is ensured to be unchanged; when the thermal expansion amount of the outer pipe is smaller than that of the inner pipe, the sealing flange moves downwards relative to the inner pipe, the axial distance between the shaft shoulder of the inner pipe and the sealing flange is reduced, the compression amount of the spring element is increased, the elastic force is increased, the acting force on the positioning end face of the positioning block and the positioning end face of the outer spray head is increased, and the assembling size of the head of the spray nozzle cannot be changed. Therefore, a spring element with reasonable performance parameters and initial compression amount must be selected to ensure that the acting force on the positioning end faces of the positioning block and the outer spray head is always greater than zero.
Because the channels of all layers are connected through the flange and the assembly size of the nozzle head is ensured by utilizing the elastic force of the spring element, the requirements on processing and assembly are lower; and the elastic adjusting mechanism ensures that the assembly size of the nozzle head can not change all the time in the using process, so the nozzle runs more stably.
According to a second aspect of the present invention, there is provided a control method of a nozzle head assembly size, the nozzle comprising an inner tube 4, an outer tube 5, an inner nozzle 6, an outer nozzle 8, a connecting flange 3 and a sealing flange 2; the lower end of the outer pipe 5 is connected with an outer spray head 8, the top end of the outer pipe is connected with a connecting flange 3, and the side wall of the outer pipe is provided with an outer ring medium inlet flange 14; the lower end of the inner pipe 4 is connected with an inner spray head 6, and the top end is provided with a central medium inlet flange 1; the inner pipe 4 and the inner spray head 6 are arranged inside the outer pipe 5 and the outer spray head 8, the connecting flange 3 is matched with the sealing flange 2, and the top end of the outer pipe 5 is sealed; the control method comprises the following steps:
a sealing element 9 is arranged between the inner pipe 4 and the sealing flange 2, and the sealing element 9 is a reciprocating dynamic seal because the inner pipe 4 and the sealing flange 2 have axial relative movement in the use process;
the inner profile of the outer nozzle 8 is processed into a convex structure, wherein the section with larger inner diameter is of a cylindrical structure, the section with smaller inner diameter is of a contracted conical structure, and a positioning end surface vertical to the central shaft is formed at the sudden change position of the inner diameter; one end of a positioning block 7 is welded on the outer wall surface of the inner spray head 6, and the other end is lapped on the positioning end surface of the outer spray head 8, so that the inner spray head 6 and the outer spray head 8 are limited in the axial direction and the radial direction;
an elastic adjusting mechanism is arranged in a cavity formed by the inner pipe 4 and the outer pipe 5, a shaft shoulder 13 is processed at the upper part of the inner pipe 4 close to the connecting flange 3, one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange 2, the other end of the elastic adjusting mechanism is supported on the shaft shoulder 13 of the inner pipe, the elastic adjusting mechanism is adjusted to apply axial elastic force to the shaft shoulder 13 all the time, and the axial elastic force is transmitted through the shaft shoulder → the inner pipe → the inner spray head → the positioning block → the outer spray head in sequence, so that the positioning end face of the positioning block 7 and the positioning end face of the outer spray head 8 are.
In a preferred embodiment of the invention, the positioning block 7 is processed into a wedge shape against the flow direction, so that the wind resistance is reduced; the back flow direction is processed into a straight surface which is used for being matched with the positioning end surface of the outer spray head 8 in the axis direction through the straight surface; and the outer arc surface is processed in the circumferential direction and is matched with the inner arc surface of the section with the larger inner diameter of the outer spray head 8.
In a preferred embodiment of the present invention, the elastic adjustment device is mounted as follows: the elastic adjusting device comprises spring elements 10, guide rods 12 and supporting plates 11, wherein N groups of guide rods 12 and spring elements 10 are uniformly arranged around a central shaft, N small holes are uniformly formed in the corresponding supporting plates around the central shaft of the supporting plates 11, and N is more than or equal to 2, as shown in FIG. 3; one end of a guide rod 12 is fixed on the inner end face of the sealing flange 2, and the other end of the guide rod passes through a small hole in the support plate 11 to be a free end; the spring element 10 is sleeved outside the guide rod 12, and two ends of the spring element are respectively supported on the end faces of the sealing flange 2 and the support plate 11; the lower end face of the support plate 11 is supported on a shoulder 13 of the inner tube 4.
And selecting a spring element and an initial compression amount with reasonable performance parameters, and ensuring that the acting force on the positioning end faces of the positioning block and the outer spray head is always greater than zero when the thermal expansion amount of the outer pipe is greater than that of the inner pipe or the thermal expansion amount of the outer pipe is less than that of the inner pipe, so that the assembling size of the head of the spray nozzle cannot be changed.
Examples
Example 1
When the nozzle device is applied to the gasification of coal water slurry of a project, the central medium inlet flange 1 supplies the coal water slurry, and the outer ring medium inlet flange 14 supplies oxygen; the outer side is provided with a water jacket cooling water protection device; the number M of the positioning blocks 7 is equal to 4, and the number N of the groups of the spring elements 10 is equal to 2. The specific operating parameters are shown in table 1 below:
TABLE 1
After the coal water slurry heater is put into operation (working condition 2), the temperature of the coal water slurry is increased by 132.5 ℃ compared with the working condition 1, and the corresponding inner pipe 4 for conveying the coal water slurry can expand by about 5mm by heating. In the traditional nozzle structure, the expansion amount of the inner pipe directly influences the matching size of the outer nozzle 5 and the inner nozzle 6, so that the oxygen flow sectional area of the nozzle is reduced by 15 percent, and the oxygen pressure drop is increased by 30 percent. The nozzle device of the invention has no obvious change in oxygen pressure drop and water-coal-slurry pressure drop before and after the operation of the water-coal-slurry heater, thereby ensuring the operation stability of the device. Through on-site actual measurement, before and after the coal water slurry heater is put into operation, the axial distance between the end face of the central medium inlet flange 1 and the end face of the sealing flange 2 is increased by 4.6mm, which shows that the inner pipe can freely expand after being heated, and the expansion amount does not influence the head matching size of the nozzle.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. A nozzle device with an elastic adjusting mechanism is characterized by comprising an inner pipe (4), an outer pipe (5), an inner spray head (6), an outer spray head (8), a positioning block (7), a connecting flange (3), a sealing flange (2) and the elastic adjusting mechanism;
the lower end of the outer pipe (5) is connected with an outer spray head (8), the top end of the outer pipe is connected with a connecting flange (3), and an outer ring medium inlet flange (14) is arranged on the side wall of the outer pipe; the lower end of the inner pipe (4) is connected with the inner spray head (6), the top end of the inner pipe is provided with a central medium inlet flange (1), and the upper part of the inner pipe, which is close to the connecting flange (3), is provided with a shaft shoulder (13); the inner pipe (4) and the inner spray head (6) are arranged inside the outer pipe (5) and the outer spray head (8), the connecting flange (3) is matched with the sealing flange (2) to seal the top end of the outer pipe (5);
the inner profile of the outer spray head (8) is in a convex structure, wherein the section with the larger inner diameter is in a cylindrical structure, the section with the smaller inner diameter is in a contracted conical structure, and a positioning end face vertical to the central shaft is formed at the sudden change position of the inner diameter; one end of the positioning block (7) is welded on the outer wall surface of the inner spray head (6), and the other end of the positioning block is lapped on the positioning end surface of the outer spray head (8) to limit the inner spray head (6) and the outer spray head (8) in the axial direction and the radial direction;
the elastic adjusting mechanism is axially installed in a cavity formed by the inner pipe (4) and the outer pipe (5), one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange (2), the other end of the elastic adjusting mechanism is supported on a shaft shoulder (13) of the inner pipe, downward axial elastic force is applied to the shaft shoulder (13), and the positioning block (7) is driven to compress the outer spray head (8).
2. Nozzle device according to claim 1, characterized in that a seal (9) is arranged between the inner tube (4) and the sealing flange (2), said seal (9) being a reciprocating dynamic seal.
3. Nozzle device according to claim 2, wherein the inner tube (4), the outer tube (5), the inner spray head (6), the outer spray head (8), the elastic adjustment mechanism and the seal (9) are coaxial.
4. The nozzle device according to claim 1, wherein M positioning blocks (7) are uniformly arranged on the outer wall surface of the inner nozzle (6) around a central axis, M is more than or equal to 3, wherein the positioning blocks (7) are wedge-shaped towards the flow direction, and the back flow direction is a straight surface; m evenly distributed positioning blocks (7) are mutually matched with the inner arc surface of the section with the larger inner diameter of the outer spray head (8) in the circumferential direction through the outer arc surface, and are mutually matched with the positioning end surface of the outer spray head (8) through the straight surface in the axis direction.
5. The nozzle device according to claim 1, wherein the elastic adjusting device comprises spring elements (10), guide rods (12) and support plates (11), the guide rods (12) and the spring elements (10) are N groups in total and are uniformly arranged around a central shaft, N small holes are uniformly formed in the corresponding support plates (11) around the central shaft, N is more than or equal to 2, one end of each guide rod (12) is fixed on the inner end face of each sealing flange (2), and the other end of each guide rod penetrates through the small holes in the support plates (11) to be a free end; the spring element (10) is sleeved outside the guide rod (12), and two ends of the spring element are respectively supported on the end surfaces of the sealing flange (2) and the support plate (11); the lower end face of the supporting plate (11) is supported on a shaft shoulder (13) of the inner tube (4).
6. Nozzle device according to claim 1, characterized in that it is equipped with a cooling water protection device, either water jacket or coil type cooling, on the outside of the outer pipe (5) and outer spray head (8).
7. The nozzle device according to claim 1, wherein the central medium introduced into the central medium inlet flange (1) in the nozzle device comprises natural gas, coke oven gas, water vapor, chemical waste gas, or water-coal-coke slurry, residual oil, water, multicomponent slurry, organic waste liquid, chemical waste water, or pulverized coal in a flowing state; the outer ring medium introduced into the outer ring medium inlet flange (14) comprises oxygen, air, natural gas, synthetic gas and steam.
8. A control method for the assembly size of a nozzle head is characterized in that the nozzle comprises an inner pipe (4), an outer pipe (5), an inner spray head (6), an outer spray head (8), a connecting flange (3) and a sealing flange (2); the lower end of the outer pipe (5) is connected with an outer spray head (8), the top end of the outer pipe is connected with a connecting flange (3), and an outer ring medium inlet flange (14) is arranged on the side wall of the outer pipe; the lower end of the inner pipe (4) is connected with an inner spray head (6), and the top end is provided with a central medium inlet flange (1); the inner pipe (4) and the inner spray head (6) are arranged inside the outer pipe (5) and the outer spray head (8), the connecting flange (3) is matched with the sealing flange (2) to seal the top end of the outer pipe (5); the control method comprises the following steps:
a sealing element (9) is arranged between the inner pipe (4) and the sealing flange (2);
the inner profile of the outer spray head (8) is processed into a convex structure, wherein the section with larger inner diameter is of a cylindrical structure, the section with smaller inner diameter is of a contracted conical structure, and a positioning end face vertical to the central shaft is formed at the sudden change position of the inner diameter; one end of a positioning block (7) is welded on the outer wall surface of the inner spray head (6), the other end of the positioning block is lapped on the positioning end surface of the outer spray head (8), and the inner spray head (6) and the outer spray head (8) are limited in the axial direction and the radial direction;
an elastic adjusting mechanism is arranged in a cavity formed by the inner pipe (4) and the outer pipe (5), a shaft shoulder (13) is processed at the upper part of the inner pipe (4) close to the connecting flange (3), one end of the elastic adjusting mechanism is fixed with the inner end face of the sealing flange (2), the other end of the elastic adjusting mechanism is supported on the shaft shoulder (13) of the inner pipe, the elastic adjusting mechanism is adjusted to enable the elastic adjusting mechanism to always apply axial elastic force to the shaft shoulder (13), and the axial elastic force is transmitted through the shaft shoulder → the inner pipe → the inner spray head → the positioning block → the outer spray head in sequence, so that the positioning end face of the positioning block (7) and the positioning end face of the outer spray head (8).
9. The control method according to claim 8, characterized in that the positioning block (7) is machined into a wedge shape against the flow direction; the back flow direction is processed into a straight surface, and the straight surface is matched with the positioning end surface of the outer spray head (8); the outer arc surface is processed in the circumferential direction and is mutually matched with the inner arc surface of the section with larger inner diameter of the outer spray head (8).
10. The control method according to claim 8, wherein the elastic adjustment device is installed as follows: the elastic adjusting device comprises spring elements (10), guide rods (12) and supporting plates (11), wherein N groups of guide rods (12) and spring elements (10) are uniformly distributed around a central shaft, N small holes are uniformly formed in the corresponding supporting plates around the central shaft of the supporting plates (11), and N is more than or equal to 2; one end of a guide rod (12) is fixed on the inner end face of the sealing flange (2), and the other end of the guide rod penetrates through a small hole in the support plate (11) to be a free end; the spring element (10) is sleeved outside the guide rod (12), and two ends of the spring element are respectively supported on the end faces of the sealing flange (2) and the support plate (11); the lower end face of the supporting plate (11) is supported on a shaft shoulder (13) of the inner tube (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN209027315U (en) * | 2018-11-04 | 2019-06-25 | 佛山市科皓燃烧设备制造有限公司 | A kind of two-stage exchanges heat low NOx self preheating burner |
| CN209495357U (en) * | 2018-11-27 | 2019-10-15 | 中国东方电气集团有限公司 | A kind of high pressure visable burner |
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| US5791563A (en) * | 1995-02-06 | 1998-08-11 | Alcatel Na Cable Systems, Inc. | Gas burner having a fixed head burner with a quartz nozzle, a spring and an end cap |
| CN201015755Y (en) * | 2007-03-12 | 2008-02-06 | 国电科技环保集团山东龙源环保有限公司 | Impact inner-mixing type air bubble atomizing nozzle |
| CN102260533A (en) * | 2011-06-30 | 2011-11-30 | 神华集团有限责任公司 | Gasifying nozzle |
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| CN209495357U (en) * | 2018-11-27 | 2019-10-15 | 中国东方电气集团有限公司 | A kind of high pressure visable burner |
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| CN113019724B (en) | 2022-10-14 |
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