CN114877313A

CN114877313A - Water-cooling vibration grate direct-fired biomass boiler

Info

Publication number: CN114877313A
Application number: CN202210392063.0A
Authority: CN
Inventors: 陈战; 蓝晓剑; 覃喜; 成世龙; 韦家正; 陈正振; 罗宜春; 罗冠
Original assignee: Guangxi Puyuan Investment Holding Group Co ltd
Current assignee: Guangxi Puyuan Investment Holding Group Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-09
Anticipated expiration: 2042-04-14
Also published as: CN114877313B

Abstract

The invention discloses a water-cooled vibrating grate direct-fired biomass boiler, which relates to the technical field of biomass boilers and comprises a tank body, wherein the bottom of the inner side surface of the tank body is fixedly connected with an ash bridge prevention mechanism, the middle position of the inner side surface of the ash bridge prevention mechanism is fixedly connected with an overheating prevention mechanism, the ash bridge prevention mechanism comprises a combustion disc, the surface of the combustion disc is provided with a spiral groove, the middle position of the inner side surface of the combustion disc is fixedly connected with a mechanism wall, and the surface of the mechanism wall is fixedly connected with a motor. This water-cooling vibration grate direct-fired biomass boiler uses through the cooperation of preventing mechanism such as ash bridge mechanism, stirring subassembly, preventing overheated mechanism and cooling module, and it is lower to have solved the flue gas temperature of boiler bottom, contains the complex mixture of element constitution such as Cl, S, K and Na in the ash, has stronger cohesiveness and forms the ash bridge and blocks up to and how to improve water-cooling efficiency thereby ensure that the grate segment can not overheated and the problem of damage.

Description

Water-cooling vibration grate direct-fired biomass boiler

Technical Field

The invention relates to the technical field of biomass boilers, in particular to a water-cooling vibration grate direct-combustion biomass boiler.

Background

The biomass direct combustion is a technology mainly based on a water-cooling vibration grate boiler, and the biomass water-cooling vibration grate boiler has the structure that: the water-cooling vibration grate is arranged at the bottom of the hearth, the lower part of the grate is provided with 3 independent air chambers, the hearth is of a structure with a large lower part and a small upper part, the lower part is formed by flaring the upper part of the hearth, the cross section area is large and is a combustion area, the water-cooling vibration grate has the biggest characteristic of avoiding overheating of grate pieces, because biomass fuel ash is less, the combustion temperature is high, the grate pieces are easy to overheat, and therefore the water-cooling vibration grate is particularly suitable for the biomass fuel, and compared with other direct combustion processes, the process has the following characteristics: the device has long operation hours, the average time is more than 8000 hours, the fuel adaptability is strong, the variety of the processed fuel exceeds sixty types, the fuel with any proportion of ash-stalk yellow-stalk mixed combustion can be combusted, the boiler combustion is stable, the combustion efficiency is high, and the high-low temperature corrosion can be effectively relieved for the high-alkali metal fuel. Based on the above description, the present inventors found that the existing boiler mainly has the following disadvantages, for example:

the flue gas temperature at the bottom of the boiler is low, the ash contains a complex mixture composed of elements such as Cl, S, K and Na, the ash has strong cohesiveness, an ash bridge is formed to block the ash bridge, and the water cooling efficiency is improved, so that the fire grate segment is not damaged due to overheating.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a water-cooling vibration grate direct-fired biomass boiler, which solves the problems that the flue gas temperature at the bottom of the boiler is low, the ash contains a complex mixture composed of elements such as Cl, S, K and Na, the complex mixture has strong cohesiveness and forms an ash bridge to block, and the water-cooling efficiency is improved so as to ensure that a grate segment is not overheated and damaged.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a water-cooled vibration grate direct-fired biomass boiler comprises a tank body, wherein an ash-proof bridge mechanism is fixedly connected to the bottom of the inner side surface of the tank body, an anti-overheating mechanism is fixedly connected to the middle position of the inner side surface of the ash-proof bridge mechanism, the ash-proof bridge mechanism comprises a combustion disc, a spiral groove is formed in the surface of the combustion disc, a mechanism wall is fixedly connected to the middle position of the inner side surface of the combustion disc, a motor is fixedly connected to the surface of the mechanism wall, and a rotating shaft at the output end of the motor is fixedly connected with a stirring assembly;

prevent overheated mechanism including atomizer, atomizer's top and the bottom fixed connection of mechanism wall, the runner has been seted up to the inside of mechanism wall, the top position fixedly connected with cooling module on mechanism wall surface, in the device, the rotation of flight makes living beings raw and other materials carried the inside of mechanism wall, living beings raw and other materials carry jar internal combustion, the vibration exciter makes the grate segment do periodic vibration for raw and other materials burn ground is more abundant, combustion efficiency is higher, atomizer carries the liquid atomization processing of easy evaporation and spouts into in the runner, liquid cocurrent upwards cools off the grate segment, for directly letting in cooling water and cooling, the absorbed heat can be along with the air current band-off in the liquid evaporation process, need not to add cooling water system.

Preferably, the top fixedly connected with connecting pipe of the jar body, the one end fixedly connected with indirect heating equipment of the jar body is kept away from to the connecting pipe, the surface of burning dish and the below position fixed connection of the internal side face of jar, when the complex mixture deposit that element such as Cl, S, K and Na constitutes is in the boiler bottom, the middle part position undercut of burning dish, stir the subassembly and stir the gas of burning dish below position, the dust deposit is in the top position of helicla flute, for current slotted hole, the helicla flute has the continuity, when the bottom of burning dish is stirred to the flexure strip, because the complex mixture has the adhesion characteristic, drag each other between the dust and can effectively avoid forming the problem that the ash bridge leads to the jam.

Preferably, the bottom fixedly connected with ash collecting wall of the jar body, the middle part position undercut of burning dish, stir the subassembly and include stirring piece, the middle part position on stirring piece surface and the pivot fixed connection of motor output.

Preferably, the surface of the stirring piece is fixedly connected with a damping ball, the surface of the damping ball is provided with a through hole, the top of the stirring piece is fixedly connected with an elastic piece, the surface of the elastic piece is in close contact with the bottom of the combustion disc, the motor drives the stirring piece to rotate, when the air flow reaches the damping ball, the through hole on the surface of the damping ball enables the air flow to be blocked in cutting, so that the air flow is effectively stirred at the position of the damping ball, the top of the elastic piece and the bottom of the combustion disc have certain extrusion force, and the air can generate certain vibration in the stirring process of the elastic piece, so that the gray matter can fall from the spiral groove, and the stirring bar can promote the gray matter to be collected from the ash collecting wall, so that the dredging efficiency of the complex mixture gray matter is higher.

Preferably, the bottom of the stirring piece is fixedly connected with a stirring strip, the surface of the stirring strip is in close contact with the bottom of the inner side surface of the tank body, and a cutting strip is fixedly connected to the upper position of the inner side surface of the mechanism wall.

Preferably, the surperficial rotation of cutting the strip is connected with the flight, cooling module includes the stave, the surface of stave and the top position fixed connection on mechanism wall surface, through preventing grey bridge mechanism, stirring subassembly, preventing cooperation use of mechanisms such as overheated mechanism and cooling module, the flue gas temperature who has solved the boiler bottom is lower, contains the complex mixture of elementary constitution such as Cl, S, K and Na in the ash, has stronger cohesiveness and forms grey bridge and block up to and how to improve water-cooling efficiency thereby ensure that the grate segment can not be overheated and the problem of damage.

Preferably, the vibration exciter is fixedly connected to the inner side surface of the cooling wall, the grate segment is fixedly connected to the position, close to the vibration exciter, of the surface of the cooling wall, the cooling pipe is fixedly connected to the surface of the cooling wall, biomass raw materials are conveyed to the cutting bar, the cutting bar cuts and divides the raw materials and conveys the raw materials into the tank body for combustion, the vibration exciter enables fuel on the grate segment to obtain driving force, the fuel makes periodic jumping motion on the grate segment, and therefore the whole processes of preheating, drying, combustion and burnout of the fuel are completed.

Preferably, the inside of the cooling pipe is communicated with the inside of the flow channel, the bottom of the cooling wall is fixedly connected with a fog flow pipe, and the inner side surface of the fog flow pipe is fixedly connected with an air pump.

(III) advantageous effects

The invention provides a water-cooled vibrating grate direct-fired biomass boiler. The method has the following beneficial effects:

(1) this water-cooling vibration grate direct-fired biomass boiler uses through the cooperation of preventing mechanisms such as ash bridge mechanism, stirring subassembly, preventing overheated mechanism and cooling module, and the flue gas temperature who has solved the boiler bottom is lower, contains the complex mixture of element constitution such as Cl, S, K and Na in the ash, has stronger cohesiveness and forms the ash bridge and blocks up to and how to improve water-cooling efficiency thereby ensure that the grate segment can not overheated and the problem of damage.

(2) This water-cooling vibrating grate direct-fired biomass boiler, among the device, the rotation of flight makes living beings raw and other materials carried the inside of mechanism wall, living beings raw and other materials carry jar internal combustion, the vibration exciter makes the periodic vibration of grate segment, make raw and other materials burning ground more abundant, combustion efficiency is higher, the atomizer is handled and is spouted into the runner with the liquid atomization of easy evaporation, liquid cocurrent upwards cools off the grate segment, for directly letting in the cooling water and cooling, the absorptive heat can be along with the air current area from among the liquid evaporation process, need not to add cooling water system.

(3) This water-cooling vibration grate direct combustion biomass boiler, the cutting strip is carried to living beings raw and other materials, the cutting strip is shunted raw and other materials cutting and is carried jar body in and burn, the vibration exciter makes the fuel on the grate segment obtain the motive force, make the fuel make periodic jumping motion on the grate segment, thereby accomplish preheating of fuel is dry, the overall process of burning and burn out, when the fog flow in the runner during along with the air current rebound and get into the stave, cooling tube and grate segment direct contact, the intraduct fog of cooling tube flows and absorbs the heat of grate segment, the liquid of air pump work with gasification in time derives, thereby realize fluidic circulation, the refrigerated efficiency has been increased.

(4) This water-cooling vibration grate direct-fired biomass boiler, as Cl, S, the complex mixture deposit of element constitution such as K and Na when the boiler bottom, the middle part position undercut of burning dish, stir the subassembly and stir the gas of burning dish below position, the dust deposit is in the top position of helicla flute, for current slotted hole, the helicla flute has the continuity, when the flexure strip stirs the bottom of burning dish, because the complex mixture has the adhesion characteristic, drag each other between the dust and can effectively avoid forming the problem that the ash bridge leads to the jam.

(5) This water-cooling vibrating grate direct combustion biomass boiler, the motor drives and stirs the piece and rotate, when the air current reachd the damping ball, the through-hole on damping ball surface makes the air current blocked by the cutting, make the air current effectively stirred at the position of damping ball, the top of flexure strip and the bottom of burning dish have certain extrusion force, the in-process that stirs when the flexure strip can make the air produce certain vibration, thereby be favorable to the grey matter to drop from the helicla flute, stir the strip and can promote the grey matter and collect from the ash collecting wall, thereby make the efficiency of complicated mixture grey matter mediation higher.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a partial schematic view of the present invention;

FIG. 3 is a schematic structural diagram of the anti-ash bridge mechanism of the present invention;

FIG. 4 is a schematic view of the construction of the whipping assembly of the present invention;

FIG. 5 is a schematic structural view of the overheat prevention mechanism according to the present invention;

fig. 6 is a schematic structural view of the cooling module of the present invention.

In the figure: 1. heat exchange equipment; 2. a connecting pipe; 3. a tank body; 4. a dust bridge prevention mechanism; 41. a combustion tray; 42. a helical groove; 43. a dust collecting wall; 44. a motor; 45. a fog flow pipe; 5. an agitation assembly; 51. a stirring sheet; 52. a damping ball; 53. an elastic sheet; 54. the bar is stirred; 6. an anti-overheating mechanism; 61. a mechanism wall; 62. an atomizing spray head; 63. a flow channel; 64. cutting strips; 65. a spiral sheet; 7. a cooling assembly; 71. a stave; 72. fire grate segments; 73. a cooling tube; 74. a vibration exciter; 75. an air pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the present invention provides a technical solution: a water-cooled vibrating grate direct-fired biomass boiler comprises a tank body 3, an ash collecting wall 43 is fixedly connected to the bottom of the tank body 3, the middle position of a combustion disc 41 is recessed downwards, a stirring assembly 5 comprises a stirring sheet 51, a stirring bar 54 is fixedly connected to the bottom of the stirring sheet 51, the surface of the stirring bar 54 is in close contact with the bottom of the inner side face of the tank body 3, a cutting bar 64 is fixedly connected to the upper position of the inner side face of a mechanism wall 61, biomass raw materials are conveyed into the mechanism wall 61 through rotation of a spiral sheet 65 and are conveyed into the tank body 3 to be combusted, a grate sheet 72 is periodically vibrated through a vibration exciter 74, the raw materials are fully combusted, the combustion efficiency is higher, an atomizing nozzle 62 atomizes and sprays easily-evaporated liquid into a flow channel 63, the liquid particles flow upwards to cool the grate sheet 72, and are cooled relative to direct introduction of cooling water, the heat absorbed in the liquid evaporation process can be carried away along with the airflow, a cooling water system does not need to be added, the surface of the cutting bar 64 is rotatably connected with the spiral piece 65, the cooling assembly 7 comprises a cooling wall 71, the inner side surface of the cooling wall 71 is fixedly connected with a vibration exciter 74, the surface of the cooling wall 71, close to the vibration exciter 74, is fixedly connected with a fire grate segment 72, the surface of the cooling wall 71 is fixedly connected with a cooling pipe 73, the inside of the cooling pipe 73 is communicated with the inside of the flow channel 63, the bottom of the cooling wall 71 is fixedly connected with a fog flow pipe 45, the inner side surface of the fog flow pipe 45 is fixedly connected with an air pump 75, the surface of the cooling wall 71 is fixedly connected with the upper position of the surface of the mechanism wall 61, the surface of the stirring piece 51 is fixedly connected with a damping ball 52, and the surface of the damping ball 52 is provided with a through hole.

The top of the stirring sheet 51 is fixedly connected with an elastic sheet 53, the surface of the elastic sheet 53 is in close contact with the bottom of the combustion disc 41, the middle position of the surface of the stirring sheet 51 is fixedly connected with a rotating shaft at the output end of the motor 44, the top of the tank body 3 is fixedly connected with a connecting pipe 2, one end of the connecting pipe 2 far away from the tank body 3 is fixedly connected with a heat exchange device 1, the surface of the combustion disc 41 is fixedly connected with the lower position of the inner side surface of the tank body 3, the bottom of the inner side surface of the tank body 3 is fixedly connected with an ash-proof bridge mechanism 4, the middle position of the inner side surface of the ash-proof bridge mechanism 4 is fixedly connected with an overheating-proof mechanism 6, through the matching use of the ash-proof bridge mechanism 4, a stirring component 5, the overheating-proof mechanism 6, a cooling component 7 and other mechanisms, the problems that the flue gas temperature at the bottom of a boiler is low, the ash contains a complex mixture composed of elements such as Cl, S, K, Na and the like are solved, and the ash has strong caking property to form an ash bridge, and how to improve the water-cooling efficiency thereby ensure that grate segment 72 can not be overheated and the problem of damage, prevent that ash bridge mechanism 4 includes burning plate 41, spiral groove 42 has been seted up on the surface of burning plate 41, the middle part fixedly connected with mechanism wall 61 of burning plate 41 medial surface, the fixed surface of mechanism wall 61 is connected with motor 44, the pivot fixedly connected with of motor 44 output stirs subassembly 5, prevent that overheated mechanism 6 includes atomizer 62, atomizer 62's top and the bottom fixed connection of mechanism wall 61, runner 63 has been seted up to the inside of mechanism wall 61, the top fixedly connected with cooling module 7 on mechanism wall 61 surface.

When in use: this water-cooling vibration grate direct-fired biomass boiler is through preventing that the cooperation of mechanisms such as grey bridge mechanism 4, stirring subassembly 5, prevent overheated mechanism 6 and cooling module 7 uses, has solved the flue gas temperature of boiler bottom and has been lower, contains the complex mixture of element constitution such as Cl, S, K and Na in the ash, has stronger cohesiveness and forms the ash bridge and block up to and how to improve water-cooling efficiency thereby ensure that grate segment 72 can not overheated and the problem of damage.

In the device, the rotation of the spiral plate 65 enables biomass raw materials to be conveyed to the inside of the mechanism wall 61, the biomass raw materials are conveyed to the tank body 3 to be combusted, the vibration exciter 74 enables the grate plate 72 to vibrate periodically, the raw materials are combusted more sufficiently, the combustion efficiency is higher, the atomization nozzle 62 atomizes the easily evaporated liquid and sprays the easily evaporated liquid into the flow channel 63, liquid particles flow upwards to cool the grate plate 72, compared with the mode that cooling water is directly introduced for cooling, the heat absorbed in the liquid evaporation process can be carried away along with airflow without adding a cooling water system, the biomass raw materials are conveyed to the cutting strip 64, the cutting strip 64 cuts and divides the raw materials and conveys the raw materials into the tank body 3 for combustion, and the vibration exciter 74 enables the fuel on the grate plate 72 to obtain driving force, so that the fuel makes periodic jumping motion on the grate plate 72, and preheating and drying of the fuel are completed, In the whole process of combustion and burnout, when the mist flow in the flow channel 63 moves upwards along with the airflow and enters the cooling wall 71, the cooling pipe 73 is in direct contact with the fire grate segment 72, the heat of the fire grate segment 72 is absorbed by the mist flow in the cooling pipe 73, and the gasified liquid is led out in time by the operation of the air pump 75, so that the circulation of the fluid is realized, and the cooling efficiency is increased.

When a complex mixture composed of elements such as Cl, S, K and Na is deposited at the bottom of the boiler, the middle position of the combustion disc 41 is sunken downwards, the stirring component 5 stirs gas at the position below the combustion disc 41, dust is deposited at the position above the spiral groove 42, and compared with the existing groove hole, the spiral groove 42 has continuity, when the elastic sheet 53 stirs the bottom of the combustion disc 41, due to the adhesion characteristic of the complex mixture, the dust is mutually dragged to effectively avoid the problem of blockage caused by dust bridge formation, the motor 44 drives the stirring sheet 51 to rotate, when the air flow reaches the damping ball 52, the through hole on the surface of the damping ball 52 enables the air flow to be cut and blocked, so that the air flow is effectively stirred at the position of the damping ball 52, the top of the elastic sheet 53 has certain extrusion force with the bottom of the combustion disc 41, and when the elastic sheet 53 stirs, the air can generate certain vibration, thereby facilitating the falling of the ash from the spiral groove 42, the toggle bar 54 can promote the ash to be collected from the ash collecting wall 43, thereby the dredging efficiency of the ash of the complex mixture is higher.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a water-cooling vibrating grate direct combustion biomass boiler, includes jar body (3), its characterized in that: the bottom of the inner side face of the tank body (3) is fixedly connected with an ash-proof bridge mechanism (4), the middle position of the inner side face of the ash-proof bridge mechanism (4) is fixedly connected with an overheating-proof mechanism (6), the ash-proof bridge mechanism (4) comprises a combustion disc (41), a spiral groove (42) is formed in the surface of the combustion disc (41), the middle position of the inner side face of the combustion disc (41) is fixedly connected with a mechanism wall (61), the surface of the mechanism wall (61) is fixedly connected with a motor (44), and a rotating shaft at the output end of the motor (44) is fixedly connected with a stirring assembly (5);

prevent overheated mechanism (6) including atomizer (62), the bottom fixed connection of the top of atomizer (62) and mechanism wall (61), runner (63) have been seted up to the inside of mechanism wall (61), the top position fixed connection on mechanism wall (61) surface has cooling module (7).

2. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 1, characterized in that: the top fixedly connected with connecting pipe (2) of the jar body (3), the one end fixedly connected with indirect heating equipment (1) of the jar body (3) is kept away from in connecting pipe (2), the surface of burning dish (41) and the below position fixed connection of the jar body (3) medial surface.

3. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 2, characterized in that: the bottom fixedly connected with ash collection wall (43) of the jar body (3), the middle part position undercut of burning dish (41), stir subassembly (5) including stirring piece (51), the middle part position on stirring piece (51) surface and the pivot fixed connection of motor (44) output.

4. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 3, characterized in that: the surface of the stirring piece (51) is fixedly connected with a damping ball (52), the surface of the damping ball (52) is provided with a through hole, the top of the stirring piece (51) is fixedly connected with an elastic piece (53), and the surface of the elastic piece (53) is in close contact with the bottom of the combustion disc (41).

5. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 4, characterized in that: the bottom of the stirring piece (51) is fixedly connected with a stirring strip (54), the surface of the stirring strip (54) is in close contact with the bottom of the inner side surface of the tank body (3), and a cutting strip (64) is fixedly connected to the upper position of the inner side surface of the mechanism wall (61).

6. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 5, characterized in that: the surface of the cutting strip (64) is rotatably connected with a spiral sheet (65), the cooling assembly (7) comprises a cooling wall (71), and the surface of the cooling wall (71) is fixedly connected with the upper position of the surface of the mechanism wall (61).

7. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 6, characterized in that: the inner side surface of the cooling wall (71) is fixedly connected with a vibration exciter (74), the surface of the cooling wall (71) close to the vibration exciter (74) is fixedly connected with a fire grate segment (72), and the surface of the cooling wall (71) is fixedly connected with a cooling pipe (73).

8. The water-cooled vibrating grate direct-fired biomass boiler as claimed in claim 7, characterized in that: the inside of cooling tube (73) is linked together with the inside of runner (63), the bottom fixed connection of stave (71) has fog flow pipe (45), the medial surface fixed connection of fog flow pipe (45) has air pump (75).