CN215723161U

CN215723161U - Rice hull burning biomass boiler

Info

Publication number: CN215723161U
Application number: CN202122220622.3U
Authority: CN
Inventors: 刘小云; 李江平; 何楚
Original assignee: Hengyang Dacheng Boiler Co ltd
Current assignee: Hengyang Dacheng Boiler Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-01
Anticipated expiration: 2031-09-14

Abstract

A rice hull biomass fired boiler relates to the technical field of boilers and comprises an upper boiler barrel, a lower boiler barrel, a hearth, a feeding device and a grate device, wherein the upper part and the lower part of an inner cavity of the hearth are respectively provided with a radiation heated tube, the feeding device comprises a feeding hopper and a distributor, the distributor is connected with the hearth, a feeding roller is arranged in the feeding hopper, a sealing plate is arranged on the left side of the feeding roller, a discharging plate is arranged on the right side of the feeding roller, the discharging plate is rotatably connected on the feeding hopper and can be close to or far away from the feeding roller, a flashboard is arranged at an outlet at the bottom of the distributor and is connected on a rotating shaft arranged above the right side of the feeding hopper through a chain, a hand wheel which can control the rotation of the rotating shaft to drive the flashboard to lift is arranged at the left side of the feed hopper, the grate device is a scale type grate, and comprises a fire grate driven by a driving shaft and a driven shaft, wherein the rear end of the fire grate is provided with a slag stopper, and the right side of the slag stopper is provided with a slag outlet and an ash removal port. The technical scheme can improve the output of the boiler and the slag discharge capacity and can prevent tempering.

Description

Rice hull burning biomass boiler

Technical Field

The utility model relates to the technical field of boilers, in particular to a rice hull-burning biomass boiler.

Background

The rice husk has the characteristics of high ash content (7-9%) and high silica content (about 20%), and its combustible material is up to above 70%, and it has higher heat productivity, so that it is a convenient and cheap energy source. Because the raw material cost of the rice hulls is low, if the rice hulls are used as combustion raw materials of a boiler, the cost can be saved, and compared with coal, the rice hulls are more environment-friendly. However, the existing boiler still has the problems of insufficient combustion, insufficient slag discharge capacity, fuel tempering and the like at present, and the rice husk has the characteristics of large slag discharge amount, much ash and the like after being combusted, so that the existing boiler is obviously not suitable for the rice husk as the fuel.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rice hull-fired biomass boiler, which is used for improving the output and slag discharge capacity of the boiler and preventing tempering.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a rice hull biomass fired boiler comprises a boiler body, wherein the boiler body comprises an upper boiler barrel, a lower boiler barrel, a hearth, a feeding device and a grate device, the lower boiler barrel is shorter than the upper boiler barrel and is positioned at the right lower part of the upper boiler barrel, the hearth is positioned at the left lower part of the upper boiler barrel, a first radiation heated pipe is arranged at the upper part of a hearth inner cavity, a second radiation heated pipe is arranged at the lower part of the hearth inner cavity, the feeding device is arranged at the left side of the hearth, the feeding device comprises a feeding hopper and a distributor arranged below the feeding hopper, the distributor is connected with the hearth, a feeding roller is arranged inside the feeding hopper, a sealing plate used for preventing material leakage is arranged at the left side of the feeding roller, a material discharging plate used for controlling the size of a discharging opening is arranged at the right side of the feeding roller, the material discharging plate is rotatably connected on the feeding hopper and can be close to or far away from the feeding roller, the tripper is provided with the flashboard that can go up and down in the bottom exit of connecting furnace, the flashboard passes through the chain connection in the pivot of locating feeder hopper right side top to be provided with in the left side of feeder hopper and control the pivot and rotate the hand wheel in order to drive the flashboard lift, the grate device sets up the below at feeder and furnace, the grate device is the scale formula grate to including the grate by driving shaft and driven shaft driven, the rear end of grate is provided with the slag stopper, the right side of slag stopper is provided with slag notch and deashing mouth.

Preferably, the feeding hopper is provided with an observation opening for observing feeding conditions.

Preferably, the bottom of the distributor is provided with a baffle plate for blocking fuel from falling into the front side of the grate.

Preferably, the outer surface of the boiler body is coated with an aluminum silicate heat insulation plate.

Preferably, a convection bank is arranged between the upper drum and the lower drum, and an ash removing door for removing ash is arranged on the outer side of the convection bank.

Preferably, the biomass boiler further comprises a fixing bracket in which the boiler body is installed, the fixing bracket comprises a plurality of mounting plates detachably mounted on the outer surface of the boiler body, and each mounting plate corresponds to one of the components on the boiler body.

According to the rice hull biomass fired boiler, the upper part and the lower part of the inner cavity of the hearth are respectively provided with the radiation heating pipes, so that the radiation heating surface of the hearth is increased, the boiler output can be increased, fuel ignition and smoke flowing are facilitated, the residence time of biomass in a main combustion area in the middle of the hearth is prolonged, the biomass is burnt out, and the heat efficiency is improved. Through set up the flashboard of liftable on feeder's tripper, control opening and closing in tripper exit, can put down the flashboard when the boiler draught fan is closed in order to prevent the emergence of tempering phenomenon, simultaneously, under the cooperation of feed cylinder and blowing board, can control feed rate and feed speed well to the closing plate can avoid fuel to fall into the left side of feed cylinder and influence the control to feed rate and feed rate. This boiler is through setting up the scale formula grate, and the interval of grate segment is less, can adapt to the less rice husk of granule well to set up pushing off the slag ware, slag notch, deashing mouth in the rear end of grate, can effectively improve the sediment ability, and make things convenient for the deashing.

Drawings

FIG. 1 is a front cross-sectional view of a rice hull-fired biomass boiler in an example.

Fig. 2 is an enlarged view of a portion D in fig. 1.

FIG. 3 is a side sectional view of the rice hull-burning biomass boiler in the embodiment, wherein the left half is a section along the direction A-A, and the right half is a section along the direction B-B.

FIG. 4 is a sectional view of the rice hull-burning biomass boiler in the embodiment in the C-C direction.

FIG. 5 is a front view of the upper body of the rice hull-burning biomass boiler in the embodiment.

In the figure:

1-boiler body 2-upper drum 3-lower drum

4-hearth 5-feeding device 6-fire grate device

7-first radiant heated tube 8-second radiant heated tube 9-feed hopper

10-distributor 11-feeding roller 12-sealing plate

13-discharge plate 14-gate plate 15-chain

16-rotating shaft 17-hand wheel 18-driving shaft

19-driven shaft 20-fire grate 21-slag stopper

22-slag outlet 23-ash cleaning outlet 24-observation outlet

25-striker plate 26-convection bank 27-ash-removing door

28-platform staircase 29-pipeline valve instrument 30-rear smoke box

31-flue gas duct 32-economizer 33-ash falling device

34-sootblower.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the utility model.

As shown in fig. 1-5, a rice hull-burning biomass boiler comprises a boiler body 1, wherein the boiler body 1 comprises an upper boiler barrel 2, a lower boiler barrel 3, a hearth 4, a feeding device 5 and a fire grate device 6, the biomass boiler further comprises a platform staircase 28 and a pipeline valve instrument 29 which are arranged at the top of the boiler body 1, a rear smoke box 30 which is arranged between the tail parts of the upper boiler barrel 2 and the lower boiler barrel 3, a smoke air duct 31 which is connected with the rear smoke box 30, a coal economizer 32 which is arranged on the smoke air duct 31, a dust falling device 33 which is arranged below the lower boiler barrel 3, a dust blowing device 34 which is arranged at the rear side of the boiler body 1 and the like.

Wherein, the lower drum 3 is shorter than the upper drum 2 and is positioned at the lower right part of the upper drum 2, the hearth 4 is positioned at the lower left part of the upper drum 2, a first radiation heating pipe 7 is arranged at the upper part of the inner cavity of the hearth 4, and a second radiation heating pipe 8 is arranged at the lower part of the inner cavity of the hearth 4.

Wherein, feeder 5 sets up on 4 left sides of furnace, feeder 5 includes feeder hopper 9 and the tripper 10 of setting in feeder hopper 9 below, tripper 10 connects furnace 4, feeder hopper 9 is inside to be provided with feed cylinder 11, and be equipped with the closing plate 12 that is used for preventing to leak the material on the left side of feed cylinder 11, be equipped with the blowing board 13 that is used for controlling ejection of compact opening size on the right side of feed cylinder 11, blowing board 13 rotatable coupling is on feeder hopper 9 and can be close to or keep away from feed cylinder 11, tripper 10 is provided with the flashboard 14 that can go up and down in the bottom exit of connecting furnace 4, flashboard 14 connects on the pivot 16 of locating feeder hopper 9 right side top through chain 15, and be provided with the hand wheel 17 that can control pivot 16 and rotate in order to drive flashboard 14 and go up and down in the left side of feeder hopper 9.

The fire grate device 6 is arranged below the feeding device 5 and the hearth 4, the fire grate device 6 is a scale type fire grate and comprises a fire grate 20 driven by a driving shaft 18 and a driven shaft 19, a slag stopper 21 is arranged at the rear end of the fire grate 20, and a slag outlet 22 and an ash removal port 23 are arranged on the right side of the slag stopper 21.

It should be noted that the slag stopper 21 of the scale-type grate is placed on the shelf behind the driven shaft 19, the head of the slag stopper 21 presses on the grate 20 by its own weight, and the slag stopper mainly functions to scoop up ash, prevent the ash from falling into the grate 20, protect the rear shaft rollers, and secondly, add obstacles to the ash travel, increase the burning time of combustible materials in the ash on the grate 20, so that the ash is burned out, the remaining ash after complete burning falls into the slag outlet 22 from the slag stopper 21, and the slag outlet 22 is connected with external slag discharging equipment and is sent out of the room. And the ash cleaning opening 23 is also arranged, so that dust generated at the rear side of the slag stopper 21 can be conveniently and effectively cleaned, and the phenomenon that the excessive dust falls into the fire grate device 6 to cause failure is avoided. The fire grate 20 comprises a plurality of scale-shaped fire grate segments, the fire grate segments are connected in series into a belt through a sleeve or a roller, and gaps among the fire grate segments are small and can adapt to rice hulls with small particles.

According to the rice hull biomass fired boiler, the radiation heating surface of the hearth 4 is increased by arranging the radiation heating pipes at the upper part and the lower part of the inner cavity of the hearth 4, so that the boiler output can be increased, fuel ignition and smoke gas flowing are facilitated, the residence time of biomass in a main combustion area in the middle of the hearth 4 is prolonged, the biomass is burnt out, and the heat efficiency is improved. The lifting gate plate 14 is arranged on the distributor 10 of the feeding device 5 to control the opening and closing of the outlet of the distributor 10, the gate plate 14 can be put down when a boiler induced draft fan is closed so as to prevent the phenomenon of backfire, meanwhile, the feeding amount and the feeding speed can be well controlled under the matching of the feeding roller 11 and the discharging plate 13, and the sealing plate 12 can avoid fuel from falling into the left side of the feeding roller 11 to influence the control of the feeding speed and the feeding amount. The boiler is provided with the scale type fire grate, the distance between fire grate pieces is small, the boiler can be well adapted to rice husks with small particles, and the rear end of the fire grate 20 is provided with the slag stopper 21, the slag outlet 22 and the ash cleaning port 23, so that the slag discharging capability can be effectively improved, and ash cleaning is convenient.

In the present embodiment, the feeding hopper 9 is provided with an observation port 24 for observing feeding conditions, so that the adding condition of the fuel can be observed conveniently to control feeding.

In this embodiment, the bottom of the distributor 10 is provided with a baffle 25 for blocking the fuel from falling into the front side of the grate 20, so as to provide a certain blocking effect on the fuel and prevent the fuel from falling into the front side of the grate 20. Wherein, the striker plate 25 is arranged at the left side of the bottom of the distributor 10 and above the front end of the grate 20.

In this embodiment, the cladding of 1 surface of boiler body has the aluminium silicate heated board, can reduce boiler surface's heat dissipation loss, improves the heat preservation effect and the thermal efficiency of boiler.

In this embodiment, be provided with convection bank 26 between last boiler barrel 2 and the lower boiler barrel 3 to be provided with the deashing door 27 that is used for the deashing in convection bank 26's the outside, make the convection section of boiler can obtain timely effectual deashing, avoid because rice husk fuel ash and slag are many and cause stifled ash accident, make the boiler can not normal operating. Wherein, be provided with a plurality of deashing doors 27 that are used for the deashing on the surface of boiler body 1, wherein just including the deashing door 27 who sets up in convection bank 26 outside, can conveniently the deashing.

In this embodiment, biomass boiler still includes installs boiler body 1 the fixed bolster wherein, and the fixed bolster includes a plurality of mounting panels of demountable installation at boiler body 1 surface to each mounting panel corresponds one of them part on the boiler body 1, can make things convenient for dismouting and maintenance. Wherein, the adjustment of design and mounted position is carried out to different parts on the boiler to every mounting panel, is similar to the modularized design, can conveniently maintain when changing to certain part on the boiler and can pertinence dismantlement corresponding mounting panel, saves maintenance time.

In addition, the inclination angle of the front arch of the boiler can be kept at about 25 degrees, fuel can be burnt more quickly, the height of the front arch can be poured to about 80cm by taking the fire grate 20 as a reference surface, the height of the rear arch can be poured to about 70cm, the height of the rear arch is lower than that of the front arch, the space behind the hearth 4 can be reduced, and the fuel moving to the rear of the hearth 4 along with the fire grate 20 can be burnt out better.

Although the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the utility model.

Claims

1. A fire rice husk biomass boiler which characterized in that: comprises a boiler body (1), wherein the boiler body (1) comprises an upper boiler barrel (2), a lower boiler barrel (3), a hearth (4), a feeding device (5) and a fire grate device (6), the lower boiler barrel (3) is shorter than the upper boiler barrel (2) and is positioned at the right lower part of the upper boiler barrel (2), the hearth (4) is positioned at the left lower part of the upper boiler barrel (2), a first radiation heated pipe (7) is arranged at the upper part of an inner cavity of the hearth (4), a second radiation heated pipe (8) is arranged at the lower part of the inner cavity of the hearth (4), the feeding device (5) is arranged at the left side of the hearth (4), the feeding device (5) comprises a feeding hopper (9) and a distributor (10) arranged below the feeding hopper (9), the distributor (10) is connected with the hearth (4), a feeding roller (11) is arranged inside the feeding hopper (9), and a sealing plate (12) for preventing material leakage is arranged at the left side of the feeding roller (11), be equipped with on the right side of feed cylinder (11) and be used for controlling the blowing board (13) of ejection of compact opening size, blowing board (13) rotatable coupling can be close to or keep away from feed cylinder (11) on feeder hopper (9), tripper (10) are provided with flashboard (14) that can go up and down in the bottom exit of connecting furnace (4), flashboard (14) are connected on pivot (16) of locating feeder hopper (9) right side top through chain (15) to be provided with hand wheel (17) that can control pivot (16) and rotate in order to drive flashboard (14) lift in the left side of feeder hopper (9), grate device (6) set up the below at feeder (5) and furnace (4), grate device (6) are the scale formula grate to including grate (20) by driving shaft (18) and driven shaft (19), the rear end of grate (20) is provided with pushing off the sediment ware (21), the right side of the slag stopper (21) is provided with a slag outlet (22) and an ash cleaning port (23).

2. The rice hull-fired biomass boiler according to claim 1, characterized in that: an observation opening (24) for observing the feeding condition is arranged on the feeding hopper (9).

3. The rice hull-fired biomass boiler according to claim 1, characterized in that: the bottom of the distributor (10) is provided with a material baffle plate (25) used for preventing fuel from falling into the front side of the grate (20).

4. The rice hull-fired biomass boiler according to claim 1, characterized in that: the outer surface of the boiler body (1) is coated with an aluminum silicate heat-insulating plate.

5. The rice hull-fired biomass boiler according to claim 1, characterized in that: a convection bank (26) is arranged between the upper drum (2) and the lower drum (3), and an ash cleaning door (27) for cleaning ash is arranged on the outer side of the convection bank (26).

6. The rice hull-fired biomass boiler according to claim 1, characterized in that: the boiler comprises a boiler body (1) and is characterized by further comprising a fixed support for installing the boiler body (1) therein, wherein the fixed support comprises a plurality of mounting plates which are detachably arranged on the outer surface of the boiler body (1), and each mounting plate corresponds to one of the components on the boiler body (1).