A local oxygen-enriched combustion-supporting device for a steam boiler

Abstract

The invention relates to the technical field of local oxygen-enriched combustion-supporting technology, in particular to a local oxygen-enriched combustion-supporting device of a steam furnace, comprising: a boiler; a combustion chamber, wherein a feed port is arranged in the combustion chamber; an oxygen-enriched combustion-supporting device, comprising a platform, a first rotating shaft and a second rotating shaft, a bridge frame and an oxygen-enriched nozzle, wherein the first rotating shaft controls the opening of the oxygen-enriched nozzle when rotating, and the second rotating shaft drives the bridge frame to rotate as a whole to control the angle of the oxygen-enriched nozzle when rotating; an anti-blocking mechanism, comprising an arc scraper, which controls the flow direction of the airflow through the oxygen-enriched nozzle to prevent the influence on the flame direction and improve the combustion-supporting effect, wherein the directions of various oxygen-enriched nozzles are uniformly controlled to produce a circulating cyclone, and gas or water can be introduced to blow and clean other oxygen-enriched nozzles and the inside of the combustion chamber when the machine is shut down, wherein the opening is controlled by blades, and the rotation of the blades drives the arc scraper to scrape the inner wall, thereby realizing manual scraping by rotating the first rotating ring and automatic scraping by rotating the blades after the airflow is introduced, and at the same time, the arc scraper is realized to perform oscillation cleaning to improve the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of local oxygen-enriched combustion-supporting technology, in particular to a local oxygen-enriched combustion-supporting device of a steam furnace. Background Art

[0002] Local oxygen enrichment combustion technology is an industrial combustion technology that increases the oxygen concentration in a specific area to improve combustion efficiency. It is commonly used in boilers, furnaces, and other industrial heating equipment, especially steam boilers. The main purpose of this technology is to improve combustion efficiency, reduce fuel consumption, and reduce pollutant emissions.

[0003] The traditional combustion process relies on oxygen in the air for combustion, but the air only contains about 21% oxygen, and the rest is inert gases such as nitrogen. Local oxygen enrichment is to introduce high-concentration oxygen in the combustion area. Usually, oxygen nozzles or oxygen enrichment equipment are added to achieve local oxygen concentration. Oxygen-enriched combustion refers to the combustion of fuel mixed with oxygen with an oxygen content higher than that in the air. By increasing the oxygen concentration, the oxidation reaction of the fuel can be accelerated, the flame temperature can be increased, the incomplete combustion products can be reduced, and the energy conversion efficiency can be effectively improved. Especially in steam boilers, this can significantly increase the output and pressure of steam. Oxygen-enriched combustion not only makes the fuel burn more thoroughly, but also reduces the amount of fuel used. Under the same fuel conditions, oxygen-enriched combustion has higher thermal efficiency, can achieve the required heat output faster, and reduce pollutant emissions. In order to achieve the best effect, the selection of oxygen enrichment amount and oxygen enrichment area is very important. In the combustion chamber of a steam boiler, local oxygen enrichment is usually only carried out in key combustion areas to avoid excessive oxygen flow causing unnecessary cooling effects or local overheating, which requires a precise oxygen control system for dynamic adjustment.

[0004] The oxygen nozzle is the core component of the oxygen-enriched combustion device, which is used to introduce high-concentration oxygen into the combustion chamber. Due to the extremely high temperature in the combustion zone, the nozzle material needs to have good high-temperature resistance and oxidation resistance. Frequent high-temperature oxidation may cause the nozzle surface material to deteriorate, shorten the nozzle life, and affect the performance of the device, so it needs to be cleaned and replaced in time.

[0005] The existing Chinese patent with authorization announcement number CN203421713U discloses an oxygen-enriched local oxygen-enriched jet combustion-aiding energy-saving and emission-reduction device for a refinery heating furnace; it includes multiple sets of oxygen-enriched nozzles installed near the burner, and shortens the distance between the oxygen-enriched nozzle and the burner, reduces the injection angle of the oxygen-enriched nozzle to the combustion flame, and reduces the injection speed of the oxygen-enriched gas so that the combustion flame causes a certain displacement to one side of the oxygen-enriched nozzle; the oxygen-enriched nozzle is installed between the burner and the bottom end of the material heating tube, so that the distance L1 between the center point of the oxygen-enriched nozzle mouth and the center point of the burner is 200mm~800mm, and the angle Q1 between the central axis of the burner and the central axis of the oxygen-enriched spray gun is 10°~80°, and the oxygen-enriched injection diffusion angle R1 is 15°~65°. At this time, the oxygen-enriched gas is directly jetted into the most oxygen-deficient area in the center of the combustion flame to assist combustion, so that the temperature in the center area of ​​the combustion flame reaches the highest.

[0006] However, in the case of multiple flames, the gas injection direction is skewed, causing the flames to approach each other, resulting in local overheating and uneven heating. When applied to a steam boiler scenario, this will affect the steam output rate balance and subsequent use. The injection direction of the oxygen-enriched nozzle cannot be adjusted in real time, forming circulating airflow routes such as annular flow. At the same time, this solution cannot directly adjust the gas flow of the oxygen-enriched nozzle and cannot clean the coal ash and carbon powder in time, which is prone to accumulation and blockage. Summary of the invention

[0007] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0008] In view of the above problems in the prior art, the present invention is proposed.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: A local oxygen-enriched combustion-supporting device for a steam boiler, comprising a boiler, wherein the boiler heats and produces water vapor by burning pulverized coal or fuel oil;

[0010] A combustion chamber, the combustion chamber is arranged inside the boiler, the combustion chamber is provided with a feed inlet, and pulverized coal or fuel oil enters the combustion chamber through the feed inlet and is ignited;

[0011] The oxygen-enriched combustion aid comprises a platform arranged on the inner wall of the combustion chamber, wherein the platform is provided with a first rotating shaft and a second rotating shaft for simultaneous rotation, a bridge frame is fixedly provided on the end face of the second rotating shaft, an oxygen-enriched nozzle is movably provided on the bridge frame, the first rotating shaft controls the opening of the oxygen-enriched nozzle when rotating, and the second rotating shaft drives the bridge frame to rotate as a whole to control the angle of the oxygen-enriched nozzle when rotating; the first rotating shaft and the second rotating shaft are respectively embedded with a first gear and a second gear at one end that rotates and passes through the outside of the platform, and the inner wall of the combustion chamber is also provided with a first rotating ring and a second rotating ring for simultaneous parallel rotation, and each of the first gear and the second gear is respectively meshed with the first rotating ring and the second rotating ring; a driven shaft is also rotatably provided in the bridge frame, a second bevel gear is fixedly provided on the outer wall of the driven shaft, a first bevel gear is provided at one end of the first rotating shaft extending into the bridge frame, and the first bevel gear and the second bevel gear are meshed with each other; an anti-blocking mechanism comprises an arc scraper rotatably provided in the oxygen-enriched nozzle, and the arc scraper rotates and scrapes the inner wall of the oxygen-enriched nozzle when gas passes through the oxygen-enriched nozzle.

[0012] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam boiler described in the present invention, a cavity is provided in the bridge frame, and the oxygen-enriched gas enters the oxygen-enriched nozzle through the cavity. A cylinder is also rotatably provided in the cavity, and an angle shaft is rotatably provided in the cylinder. The angle shaft passes through one end outside the cylinder and is embedded with blades.

[0013] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam boiler described in the present invention, the driven shaft extends into the cavity and is provided with a first disc, the angle shaft extends into one end of the cylinder and is provided with a second disc, a circular array of protrusions is provided on the first disc, and a circular array of grooves is provided on the second disc.

[0014] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam furnace described in the present invention, a one-way knot is provided between the driven shaft and the first disc, and the one-way knot includes a first upper tooth and a first lower tooth engaged therewith.

[0015] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam furnace of the present invention, the first upper tooth is engaged with the first lower tooth, and when the first lower tooth rotates, it drives the first upper tooth to rotate in one direction.

[0016] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam furnace of the present invention, wherein: the outer wall of the cylinder is provided with a hub, and the hub is rotatably arranged in the cavity.

[0017] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam furnace described in the present invention, a driving shaft is slidably provided on the lower end surface of the arc-shaped scraper, and a one-way knot is also provided between the driving shaft and the first disc, and the one-way knot includes a second upper tooth and a second lower tooth.

[0018] As a preferred solution of the local oxygen-enriched combustion-supporting device of the steam boiler described in the present invention, wherein: the outer wall of the driving shaft is provided with a second lower tooth, the hub is provided with a rectangular rod, the end face of the rectangular rod is provided with a second upper tooth, and the second upper tooth is engaged with the second lower tooth; the second upper tooth includes a right-angle surface and an inclined surface, the second lower tooth is consistent with the tooth shape of the second upper tooth and is distributed in a centrally symmetrical manner, and when the second lower tooth rotates, it drives the second upper tooth to rotate unidirectionally.

[0019] The beneficial effects of the present invention are as follows: the flow direction of the oxygen-enriched airflow is controlled by the oxygen-enriched nozzles distributed in a circular array to prevent the flame direction from being affected and to improve the combustion-supporting effect; a circulating cyclone is created by uniformly controlling the direction of each oxygen-enriched nozzle and when the machine is shut down, gas or water can be introduced to blow and clean other oxygen-enriched nozzles and the inside of the combustion chamber; the opening is controlled by the blades and the rotation of the blades drives the arc scraper to scrape the inner wall, thereby realizing manual scraping by rotating the first rotating ring and automatic scraping by rotating the blades after the airflow is introduced; at the same time, the arc scraper is realized to perform oscillation cleaning to improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 It is an overall schematic diagram of the local oxygen-enriched combustion-supporting device of the steam boiler in the present invention.

[0022] Figure 2 This is an enlarged view of the combustion chamber area in the present invention.

[0023] Figure 3 It is a schematic diagram of the platform area structure in the present invention.

[0024] Figure 4 It is a schematic diagram of the bridge structure in the present invention.

[0025] Figure 5 It is a schematic diagram of the connection between the oxygen-enriched nozzle and the bridge in the present invention.

[0026] Figure 6 It is a schematic diagram of the enlarged structure of region A in the present invention.

[0027] Figure 7 Schematic diagram of the internal structure of the cavity in the present invention.

[0028] Figure 8 It is a schematic diagram of the enlarged structure of region B in the present invention.

[0029] Fig. 9 It is a schematic diagram of the enlarged structure of the C region in the present invention.

[0030] Reference numerals: 100, boiler; 1001, cavity; 1002, first disc; 1003, cylinder; 1004, angle shaft; 1005, blade; 1006, second disc; 1007, bump; 1008, groove; 1009, one-way knot; 1011, second upper tooth; 1012, second lower tooth; 1013, right-angle surface; 1014, inclined surface; 1022, drive shaft;

[0031] 200, combustion chamber; 2001, wheel hub; 2002, rectangular rod; 201, feed port;

[0032] 300, platform; 3001, first gear; 3002, second gear; 3003, first rotating ring; 3004, second rotating ring; 3005, driven shaft; 3006, first bevel gear; 3007, second bevel gear; 301, first rotating shaft; 302, second rotating shaft; 303, bridge; 304, oxygen-enriched nozzle;

[0033] 400. Curved scraper. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figure 1 to Figure 9, which is the first embodiment of the present invention, provides a local oxygen-enriched combustion-supporting device for a steam boiler, including a boiler 100, a combustion chamber 200, an oxygen-enriched combustion-supporting device and an anti-blocking mechanism. The flow direction of the oxygen gas flow is controlled by the oxygen-enriched nozzles 304 distributed in a circular array to prevent the flame direction from being affected and improve the combustion-supporting effect. The directions of the oxygen-enriched nozzles 304 are uniformly controlled to create a circulating cyclone and gas or water can be introduced to purge and clean other oxygen-enriched nozzles 304 and the inside of the combustion chamber 200 when the machine is shut down.

[0039] Specifically, it includes: a boiler 100, which heats and produces water vapor by burning pulverized coal or fuel oil; a combustion chamber 200, which is arranged inside the boiler 100, and has a feed inlet 201, through which the pulverized coal or fuel oil enters the combustion chamber 200 and is ignited;

[0040] The oxygen-enriched combustion aid comprises a platform 300 arranged on the inner wall of the combustion chamber 200, a first rotating shaft 301 and a second rotating shaft 302 are rotatably arranged on the platform 300, a bridge 303 is fixedly arranged on the end surface of the second rotating shaft 302, an oxygen-enriched nozzle 304 is movably arranged on the bridge 303, the first rotating shaft 301 controls the opening of the oxygen-enriched nozzle 304 when rotating, and the second rotating shaft 302 drives the bridge 303 to rotate as a whole to control the angle of the oxygen-enriched nozzle 304 when rotating;

[0041] The anti-blocking mechanism includes an arc scraper 400 rotatably arranged in the oxygen-enriched nozzle 304 . The arc scraper 400 rotates and scrapes the inner wall of the oxygen-enriched nozzle 304 when gas passes through the oxygen-enriched nozzle 304 .

[0042] Among them, the platforms 300 are two trapezoidal plates arranged in parallel, the trapezoidal plates are perpendicular to the axis direction of the combustion chamber 200, and are fixedly arranged on the inner wall of the combustion chamber 200. There are six platforms 300 and they are distributed in a circular array along the inner wall of the combustion chamber 200. There are three feed ports 201 and they are staggered with the six oxygen-enriched nozzles 304, so that the disturbance of the flame by the gas ejected from each oxygen-enriched nozzle 304 offsets each other, avoiding local overheating caused by the concentration of combustion flames and uneven overall heating.

[0043] Preferably, the first rotating shaft 301 and the second rotating shaft 302 rotate and penetrate one end of the outside of the platform 300 and are respectively embedded with a first gear 3001 and a second gear 3002, and the inner wall of the combustion chamber 200 is also simultaneously and parallelly rotated with a first rotating ring 3003 and a second rotating ring 3004, and each first gear 3001 and second gear 3002 is respectively engaged with the first rotating ring 3003 and the second rotating ring 3004.

[0044] More preferably, the first rotating ring 3003 and the second rotating ring 3004 are driven and controlled by motors and have teeth on the inner walls, so as to mesh with the first gear 3001 and the second gear 3002 distributed in a circular array. The bridge 303 is in a gate shape, and the two arms are parallel to the two sides of the platform 300.

[0045] The first rotating shaft 301 rotates to penetrate into the bridge frame 303 and is rotatably connected to the inner wall of the bridge frame 303. In this embodiment, a valve is provided in the oxygen-enriched nozzle 304, and the flow rate through the oxygen-enriched nozzle 304 changes when the valve rotates.

[0046] A driven shaft 3005 is rotatably disposed in the bridge frame 303, a second bevel gear 3007 is fixedly sleeved on the outer wall of the driven shaft 3005, a first bevel gear 3006 is disposed at one end of the first rotating shaft 301 extending into the bridge frame 303, and the first bevel gear 3006 and the second bevel gear 3007 are meshed with each other.

[0047] Furthermore, the first rotating shaft 301 and the second rotating shaft 302 are coaxial, the driven shaft 3005 is arranged perpendicular to the axis direction of the first rotating shaft 301 and the second rotating shaft 302 , and the first bevel gear 3006 is vertically meshed with the second bevel gear 3007 .

[0048] Among them, in this embodiment, the driven shaft 3005 extends to one end inside the oxygen-enriched nozzle 304 and is connected to the valve. When oxygen-enriched combustion is carried out, oxygen is introduced into the oxygen-enriched nozzle 304. At this time, the first rotating shaft 301 is rotated, and the second bevel gear 3007 and the driven shaft 3005 are driven to rotate through the first bevel gear 3006, thereby adjusting the oxygen flow rate in the oxygen-enriched nozzle 304. The accuracy of oxygen-enriched combustion is achieved through quantitative adjustment of the oxygen rate.

[0049] More preferably, by adjusting the directions of the oxygen-enriched nozzles 304 so that the airflow directions of the oxygen-enriched nozzles 304 form a hexagonal line, a cyclone is generated, and oxygen flows evenly to all parts of the combustion chamber 200 with the cyclone, greatly enhancing the oxygen-enriched combustion effect of this part.

[0050] Furthermore, the oxygen-enriched nozzles 304 are adjusted to be arranged in a staggered manner of 120°, and air is continuously introduced after the flame is turned off to purge the coal fly ash accumulated outside the oxygen-enriched nozzles 304 to prevent agglomeration and accumulation on the surface of the oxygen-enriched nozzles 304 after cooling, thereby corroding or clogging the nozzles and affecting the jet direction.

[0051] In summary, when local oxygen-enriched combustion is required, each oxygen-enriched nozzle 304 is adjusted toward the axis of the combustion chamber 200, so as to be staggered with the flames formed by ignition of each feed port 201, and a set proportion of oxygen is introduced into the oxygen-enriched nozzle 304, and the oxygen proportion is determined by the actual combustion value. At this time, the control motor rotates the first rotating ring 3003, thereby driving the first gear 3001 and the first rotating shaft 301 to rotate, and drives the second bevel gear 3007 meshing therewith to rotate through the first bevel gear 3006, and the second bevel gear 3007 and the driven shaft 3005 connected thereto rotate to control the valve to rotate, thereby adjusting the opening of the oxygen-enriched nozzle 304, and the opening of the oxygen-enriched nozzle 304 is determined by the real-time combustion situation. By adjusting the opening, the distance between the flames in the combustion chamber 200 is maintained without deflection to cause local overheating, thereby improving the combustion effect of local oxygen enrichment and combustion assistance;

[0052] At the same time, the second rotating ring 3004 and the second rotating shaft 302 are rotated to make the bridge 303 rotate as a whole, thereby driving the oxygen-enriched nozzle 304 to rotate around the axis of the second rotating shaft 302, and then the nozzle opening is adjusted to the set value by rotating the first rotating ring 3003, thereby changing the injection direction of the oxygen-enriched nozzle 304, adjusting the internal airflow direction, forming a circulating airflow vortex, ensuring uniform oxygen distribution, and improving the local oxygen enrichment and combustion-supporting effect. After the local oxygen enrichment and combustion-supporting is completed, each oxygen-enriched nozzle 304 is adjusted to face the adjacent oxygen-enriched nozzle 304 and air is introduced, so that the coal fly ash accumulated outside the oxygen-enriched nozzle 304 can be purged to prevent agglomeration and accumulation on the surface of the oxygen-enriched nozzle 304 after cooling, corroding the nozzle or clogging the nozzle, and affecting the injection direction.

[0053] Example 2

[0054] Reference Figure 1 to Figure 9 , which is the second embodiment of the present invention, is based on the previous embodiment, except that the opening is controlled by a blade 1005 instead of a valve, and at the same time, the blade 1005 rotates to drive the arc scraper 400 to scrape the inner wall.

[0055] Specifically, a cavity 1001 is provided in the bridge 303, and the oxygen-enriched gas enters the oxygen-enriched nozzle 304 through the cavity 1001. A cylinder 1003 is also rotatably provided in the cavity 1001, and an angle shaft 1004 is rotatably provided in the cylinder 1003. The angle shaft 1004 penetrates to one end outside the cylinder 1003 and is embedded with a blade 1005.

[0056] The driven shaft 3005 extends into the cavity 1001 and is provided with a first disc 1002 , the angle shaft 1004 extends into one end of the cylinder 1003 and is provided with a second disc 1006 , the first disc 1002 is provided with a circumferential array of bumps 1007 , and the second disc 1006 is provided with a circumferential array of grooves 1008 .

[0057] The first disk 1002 and the second disk 1006 are vertically arranged and the protrusion 1007 and the groove 1008 are meshed with each other, so that when the first disk 1002 rotates, the second disk 1006 meshed therewith is driven to rotate.

[0058] More preferably, there are six second discs 1006 and blades 1005 and they are distributed in an array along the circumference of the cylinder 1003. The blades 1005 are fan-shaped. When the six blades 1005 are laid flat, they form a circle and seal the cavity 1001 to prevent the gas from flowing.

[0059] Furthermore, in this embodiment, a one-way knot 1009 is provided between the driven shaft 3005 and the first disc 1002. The one-way knot 1009 in this embodiment includes a first upper tooth and a first lower tooth engaged therewith. The first upper tooth is engaged with the first lower tooth and when the first lower tooth rotates, the first upper tooth is driven to rotate in one direction.

[0060] In the present invention, the one-way knot 1009 is used for one-way rotation transmission. Technical personnel in this field can select one-way knots 1009 of different specifications according to the size of the matching workpiece when using it. In other embodiments, the one-way knot 1009 can also adopt a one-way ratchet structure to achieve one-way rotation through the ratchet located on the first upper tooth and the pawl on the first lower tooth, or use a one-way transmission knot to achieve one-way transmission.

[0061] More preferably, in this embodiment, the angle shaft 1004 is rotatably connected to the cylinder 1003 via a thread, and the angle shaft 1004 and the blade 1005 can be driven to rotate through the second disc 1006 only when the first disc 1002 rotates clockwise. When the blade 1005 is flipped at a certain angle and blown by the airflow to rotate counterclockwise, it drives the first disc 1002 to rotate clockwise, and through the one-way knot 1009, the entire first disc 1002 can be driven to rotate independently without affecting the driven shaft 3005.

[0062] In summary, in the initial state, the six blades 1005 are laid flat to form a circle and fit the inner wall of the cavity 1001, preventing the high-temperature gas from flowing through the cavity 1001 and preventing heat loss. When oxygen-enriched combustion is required, the first rotating ring 3003 is rotated so that the driven shaft 3005 drives the first disc 1002 to rotate clockwise but cannot drive it to rotate counterclockwise. The rotation of the first disc 1002 drives the second disc 1006 and the angle shaft 1004 to rotate, so that the blades 1005 slide from the inside of the second disc 1006 to the outside while rotating at a certain angle. When the blades 1005 rotate 45°, the first disc 1002 rotates counterclockwise and the second disc 1006 rotates counterclockwise. The oxygen flow drives each blade 1005 to rotate counterclockwise synchronously, and drives the first disc 1002 to rotate clockwise through each meshing second disc 1006, and drives the entire first disc 1002 to rotate independently without affecting the driven shaft 3005 through the one-way knot 1009. At the same time, in this embodiment, the arc scraper 400 is connected to the end face of the first disc 1002, so that the arc scraper 400 rotates while the first disc 1002 rotates, so as to timely scrape off the coal fly ash and accumulated carbon powder on the inner wall of the nozzle, so as to prevent the accumulation of impurities on the inner wall of the oxygen-enriched nozzle 304.

[0063] Example 3

[0064] Reference Figure 1-Figure 9 , which is the third embodiment of the present invention, is based on the previous embodiment, but is different in that it can simultaneously realize manual scraping by rotating the first rotating ring 3003 and automatic scraping by rotating the blades 1005 after the airflow is introduced, and at the same time realize oscillating cleaning of the arc scraper 400 to improve the cleaning effect.

[0065] Specifically, a hub 2001 is provided on the outer wall of the cylinder 1003, and the hub 2001 is rotatably arranged in the cavity 1001. A driving shaft 1022 is slidably arranged on the lower end surface of the arc scraper 400. A one-way knot 1009 is also provided between the driving shaft 1022 and the first disc 1002, and the one-way knot 1009 includes a second upper tooth 1011 and a second lower tooth 1012.

[0066] Among them, the driving shaft 1022 and the first disk 1002 are arranged coaxially, and the two are also connected by a one-way knot 1009. The two one-way knots 1009 have the same structure, but the size of the one-way knot 1009 between the two is larger than the one-way knot 1009 between the first disk 1002 and the driven shaft 3005.

[0067] In this embodiment, the two one-way knots 1009 on both sides of the first disk 1002 rotate in the same direction, so that when the driven shaft 3005 rotates, the driving shaft 1022 can be driven to rotate through the two one-way knots 1009. When the first disk 1002 is driven to rotate by the second disk 1006, it drives the driving shaft 1022 to rotate without affecting the driven shaft 3005.

[0068] Furthermore, in this scenario, the first rotating ring 3003 can be rotated to cause the driven shaft 3005 to rotate, driving the drive shaft 1022 and the arc scraper 400 to rotate unidirectionally for scraping. The airflow during operation can also be used to drive the blades 1005 to rotate, so that the first disc 1002 rotates, driving the drive shaft 1022 and the arc scraper 400 to rotate unidirectionally for scraping.

[0069] Preferably, the outer wall of the driving shaft 1022 is provided with a second lower tooth 1012 , the wheel hub 2001 is provided with a rectangular rod 2002 , the end surface of the rectangular rod 2002 is provided with a second upper tooth 1011 , and the second upper tooth 1011 is engaged with the second lower tooth 1012 .

[0070] The second upper tooth 1011 includes a right-angled surface 1013 and an inclined surface 1014 , the second lower tooth 1012 has the same tooth shape as the second upper tooth 1011 and is centrally symmetrically distributed, and the second lower tooth 1012 drives the second upper tooth 1011 to rotate unidirectionally when rotating.

[0071] Among them, the arc scraper 400 and the drive shaft 1022 are slidably connected by a flat key, and a spring is also provided between the drive shaft 1022 and the arc scraper 400. When the drive shaft 1022 slides into the deepest part of the arc scraper 400, it pushes the arc scraper 400 to move, and generates friction and collision with the oxygen-enriched nozzle 304, and removes the adsorbed coal ash and carbon powder through high-frequency vibration to reduce the possibility of accumulation and blockage. When the arc scraper 400 cannot be pushed, the drive shaft 1022 cannot move, the entire first rotating ring 3003 is stuck, and the air outlet flow rate is reduced, which indicates internal blockage. At this time, the first arc scraper 400 is manually driven to scrape and remove the agglomerated coal ash.

[0072] Furthermore, the driving shaft 1022 can extend and slide up and down for a certain distance while driving the arc scraper 400 to rotate. The right-angle surfaces 1013 and the inclined surfaces 1014 of the second upper teeth 1011 and the second lower teeth 1012 are arranged and distributed in directions opposite to the other two one-way knots 1009.

[0073] In summary, the drive shaft 1022 is pulled outward to move upward and disengage the one-way knot 1009 between the first disk 1002, and the second lower tooth 1012 on the drive shaft 1022 moves and engages with the second upper tooth 1011. Neither the driven shaft 3005 nor the first disk 1002 can drive the drive shaft 1022 to rotate, but the second upper tooth 1011 slides along the inclined surface 1014 and the right-angle surface 1013 of the second lower tooth 1012, and the drive shaft 1022 moves up and down accordingly. Reset under pressure, the faster the cylinder 1003 rotates, the faster the frequency of the up and down reciprocating movement of the drive shaft 1022. In this embodiment, the size specifications of the second upper tooth 1011 and the second lower tooth 1012 here are much larger than those of the other two places, so that the amplitude of the up and down reciprocating frequency increases. After the scraping is completed, the arc scraper 400 contacts and collides with the inner wall of the oxygen-enriched nozzle 304 to generate oscillation, and the dust and coal ash after scraping are oscillated and fall, thereby cleaning the oxygen-enriched nozzle 304 and preventing blockage.

[0074] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0075] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0076] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A local oxygen-enriched combustion-supporting device for a steam boiler, characterized in that: include: A boiler (100), wherein the boiler (100) produces steam by heating through burning pulverized coal or fuel oil; A combustion chamber (200), the combustion chamber (200) being arranged inside the boiler (100), the combustion chamber (200) being provided with a feed inlet (201), and pulverized coal or fuel oil entering the combustion chamber (200) through the feed inlet (201) and being ignited; The oxygen-enriched combustion aid comprises a platform (300) arranged on the inner wall of the combustion chamber (200), a first rotating shaft (301) and a second rotating shaft (302) being rotatably arranged on the platform (300), a bridge frame (303) being fixedly arranged on the end surface of the second rotating shaft (302), an oxygen-enriched nozzle (304) being movably arranged on the bridge frame (303), the first rotating shaft (301) controlling the opening of the oxygen-enriched nozzle (304) when rotating, and the second rotating shaft (302) driving the bridge frame (303) to rotate as a whole to control the angle of the oxygen-enriched nozzle (304) when rotating; The first rotating shaft (301) and the second rotating shaft (302) are respectively embedded with a first gear (3001) and a second gear (3002) at one end thereof which rotate and penetrate the outside of the platform (300); the inner wall of the combustion chamber (200) is also provided with a first rotating ring (3003) and a second rotating ring (3004) which rotate in parallel at the same time; each of the first gear (3001) and the second gear (3002) is respectively meshed with the first rotating ring (3003) and the second rotating ring (3004); A driven shaft (3005) is rotatably disposed in the bridge frame (303); a second bevel gear (3007) is fixedly sleeved on the outer wall of the driven shaft (3005); a first bevel gear (3006) is disposed at one end of the first rotating shaft (301) extending into the bridge frame (303); the first bevel gear (3006) and the second bevel gear (3007) are meshed with each other; The anti-blocking mechanism comprises an arc-shaped scraper (400) rotatably arranged in the oxygen-enriched nozzle (304); the arc-shaped scraper (400) rotates when gas passes through the oxygen-enriched nozzle (304) and scrapes the inner wall of the oxygen-enriched nozzle (304).

2. The local oxygen-enriched combustion-supporting device for a steam boiler as claimed in claim 1, characterized in that: A cavity (1001) is provided in the bridge frame (303), and oxygen-enriching gas enters the oxygen-enriching nozzle (304) via the cavity (1001). A cylinder (1003) is also rotatably provided in the cavity (1001), and an angle shaft (1004) is rotatably provided in the cylinder (1003). A blade (1005) is embedded at one end of the angle shaft (1004) that passes through the outside of the cylinder (1003).

3. The local oxygen-enriched combustion-supporting device for a steam boiler as claimed in claim 2, characterized in that: The driven shaft (3005) extends into the cavity (1001) and is provided with a first disc (1002); one end of the angle shaft (1004) extending into the cylinder (1003) is provided with a second disc (1006); a circumferential array of protrusions (1007) is provided on the first disc (1002); and a circumferential array of grooves (1008) is provided on the second disc (1006).

4. The local oxygen-enriched combustion-supporting device for a steam furnace as claimed in claim 3, characterized in that: A one-way knot (1009) is provided between the driven shaft (3005) and the first disc (1002), the one-way knot (1009) comprising a first upper tooth and a first lower tooth engaged therewith, the first upper tooth being engagedly connected with the first lower tooth and when the first lower tooth rotates, the first upper tooth is driven to rotate in one direction.

5. The local oxygen-enriched combustion-supporting device for a steam furnace as claimed in claim 4, characterized in that: The outer wall of the cylinder (1003) is provided with a hub (2001), and the hub (2001) is rotatably disposed in the cavity (1001).

6. The local oxygen-enriched combustion-supporting device for a steam boiler as claimed in claim 5, characterized in that: A driving shaft (1022) is slidably provided on the lower end surface of the arc-shaped scraper (400), and a one-way knot (1009) is also provided between the driving shaft (1022) and the first disc (1002), the one-way knot (1009) comprising a second upper tooth (1011) and a second lower tooth (1012).

7. The local oxygen-enriched combustion-supporting device for a steam furnace as claimed in claim 6, characterized in that: The outer wall of the driving shaft (1022) is provided with the second lower teeth (1012), the wheel hub (2001) is provided with a rectangular rod (2002), the end surface of the rectangular rod (2002) is provided with second upper teeth (1011), and the second upper teeth (1011) are engaged with the second lower teeth (1012).

8. The local oxygen-enriched combustion-supporting device for a steam furnace as claimed in claim 7, characterized in that: The second upper tooth (1011) comprises a right-angled surface (1013) and an inclined surface (1014); the second lower tooth (1012) has a consistent tooth shape with the second upper tooth (1011) and is centrally symmetrically distributed; when the second lower tooth (1012) rotates, it drives the second upper tooth (1011) to rotate in one direction.

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