CN2049313U

CN2049313U - Rotary reciprocating grate

Info

Publication number: CN2049313U
Application number: CN 89206912
Authority: CN
Inventors: 李同德
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-05-09
Filing date: 1989-05-09
Publication date: 1989-12-13

Abstract

The utility model discloses a rotary reciprocating grate used for the burners of industrial vertical boilers or other industrial boilers. The main technical proposal of the rotary reciprocating grate is that the rotary reciprocating grate is divided into a main grate and an auxiliary grate which are driven by two non-circular gears; the grates are driven to do uniform speed rotation, and reciprocal motion is generated between the fire grate segments; the coal is caused to do inverse spinel motion from the outer edge of the grates to the central part of the grates. So, reasonable air distribution is easily achieved and a favorable condition is created for reasonable organizing combustion; hence, the combustion is sufficient and the phenomena of exhausting black smoke and wasting fuel are thoroughly changed. The utility model has the advantages of simple structure, long service life, convenient operation, etc.

Description

Rotary reciprocating grate

The utility model relates to a kind of rotary reciprocating fire grate.It is used for the burner of industrial vertical boiler or other Industrial Boiler.

The fire grate that present industrial vertical boiler is commonly used has three kinds: a kind of is fixed fire grate, this fire grate can not be equably according to drying in stove because of coal, destructive distillation, burning, the process of burnouting is carried out, thereby incomplete combustion, in large quantities over-emitting black exhaust, not only environment is caused severe contamination, but also wasted a large amount of energy.Second kind is naked light retro-combustion boiler, and this boiler is provided with, following two combustion chambers, and coal carries out drying, destructive distillation in upper combustion chamber, separates out to enter lower combustion chamber behind the fugitive constituent and burn away the intact journey after-flame stage.The shortcoming of this boiler is that the life-span is short, and operation requires high.Because the fire grate of upper combustion chamber (for the water-cooled pipe type fire grate) is in the high-temperature region of combustion chamber, fire grate very easily burns out, and has only half a year average life.And fire grate damages the back and repairs very difficulty.Two combustion phases of its upper and lower two combustion chambers are the conscientiously operations by the fireman, could finish preferably by rule of thumb, and most firemans do not reach above-mentioned requirements, thereby the burning of most boilers still can not be solved preferably.The level height of stoke hole of adding upper combustion chamber is all more than one meter, and coal is hard, and most fireman is reluctant from upper coal feeding hole coal, and directly coal is added lower combustion chamber, makes boiler room lose its due advantage entirely.The third is drawing plate lifting and retort(-type) stoker, and its scheme is that coal enters from bottom to top from the fire grate center, then to around diffusion combustion.Its shortcoming is the coal seam thickness inequality, the air distribution difficulty, and combustion conditions is bad.And the air intake direction is with to advance the coal direction consistent, makes the coal burning of facining the wind, and burning condition is poor.In addition, coal is diffusion around middle mind-set, and the volume of coal is dwindling in combustion process, and area is enlarging, and has converse phenomenon, can not form central combustion zone, makes the burning of coal difficulty, and efficiency of combustion is low, the difficulty of slagging tap.Therefore fail to obtain to promote always.

The purpose of this utility model is at above-mentioned weak point of the prior art, and a kind of rotary reciprocating fire grate is provided, it makes coal do down spiral motion by outer rim to the centre on fire grate, and can automatically keep firing layer thickness, thereby reach burning fully, not over-emitting black exhaust.

The utility model is achieved in that it comprises feeder down, transmission mechanism and fire grate, fire grate is circular, and fire grate is divided into the main row 5 and 4 two parts that send to the compositor, and its edge is equipped with the gear teeth, holding concurrently is driven pulley, main row 5 and send to the compositor and 4 go up on the axle 7 in being installed in, and central shaft 7 is a hollow-core construction.Main row 5 and sending to the compositor 4 is driven by two non-circular gears (driving wheel 3) respectively, and two driving wheels 3 are contained on the same axle, and makes it differ certain angle installing on the location.

Main row 5 and 4 the disc number of sending to the compositor equate, and interleaved arranges, and top is concordant, puts fire grate segment 2 so that install.

Fire grate segment 2 be installed in main row 5 and 4 the disc of sending to the compositor on, the vertical view of fire grate segment 2 is impeller shape curve, the cross section indentation of fire grate segment 2.One end of fire grate segment 2 be fixed on main row 5 or 4 the disc of sending to the compositor on, its outer fixing point adopts circumferential fixed form, interior fixing point employing hoop fixed form.The other end of fire grate segment 2 is overlapped on another fire grate segment 2, sees that on the whole fire grate segment 2 is from having an angle of crater to the center all around.

Feeder can adopt rotating manner, reciprocating manner or mode of vibration, and when adopting rotating manner, it and driving wheel 3 are contained on the same axle, by speed changer 6 transmissions.Feeder is installed in the edge of fire grate.

Operation principle of the present utility model is as follows: because it adopts the non-circular gear transmission mechanism, utilize the non-circular gear gearratio to be the rule that the cycle changes, the linear speed that can obtain driven pulley is cyclically-varying.According to this transmission principle, because two driving wheels 3 differ certain angle on the installation location, main row 5 and send to the compositor and 4 produced linear differential in rotary course has formed the cycle movement that relative speed replaces, and has just produced relative reciprocating motion like this between the fire grate segment 2.

Because fire grate is when being the uniform speed rotation, fire grate segment produces reciprocating motion each other, even the movement locus of coal on fire grate that evenly be sprinkling upon around the fire grate moved to the center along falling helix 8 for the 8(of falling helix coal), thus coal can be done in an orderly way according to needed four processes of burning (drying, dry distillation, burn, burnout) on fire grate.And can automatically keep firing layer thickness, and fiery phenomenon can not appear drawing, accomplish reasonable wind distribution easily, created good condition for reasonably organizing burning.

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the vertical view of fire grate

Fig. 3 is the vertical view of fire grate segment

Fig. 4 is the profile of fire grate segment

In Fig. 1, feeder 1 and two driving wheels 3 are installed on the same axle, by speed changer 6 transmissions.Two driving wheels 3 respectively with main row 5, sending to the compositor 4 is meshed.The fire grate overall fixed is on central shaft 7, and central shaft 7 is a hollow-core construction, the double mud hole of doing.

Two driving wheels 3 are non-circular gear, and they differ certain angle (as shown in Figure 1) when the location is installed.

Main row 5 and 4 the disc number of sending to the compositor equate, and interleaved arranges, and makes top concordant, sees Fig. 4 so that lay fire grate segment 2().

Fire grate segment 2 be installed in main row 5 and 4 the disc of sending to the compositor on, the vertical view of fire grate segment 2 is impeller shape curve (see figure 2).The cross section indentation (see figure 4) of fire grate segment 2.One end of fire grate segment 2 be fixed on main row 5 or 4 the disc of sending to the compositor on, get 2 fixing, its outer fixing point adopts circumferential fixed form, interior fixing point employing hoop fixed form.The other end of fire grate segment 2 freely is overlapped on (see figure 4) on another fire grate segment 2.See on the whole, fire grate segment 2 from around to the center the one face (see figure 1) of inclining is naturally arranged.

On fire grate segment 2, be provided with the ring-type air vent 9 that satisfies different combustion phases needs.Feeder 1 is installed in the auxiliary rafter of fire grate, by thumb wheel coal is dialled in fire grate (see figure 1) all around.

Its course of work is as follows:

Speed changer 6 drives driving wheel 3 simultaneously and feeder 1 rotates, coal will be sent into the fire grate edge equably, because of the rotation of fire grate, coal is distributed into the edge of fire grate, by the reciprocating motion of fire grate segment, make coal on fire grate, do down screw to the centre then by outward flange.According to the different phase of coal combustion, be provided with different air vent 9 on the fire grate segment.The reciprocating motion of fire grate segment can not only make coal move to the center, but also has played the effect that break pokes fire.Coal afterburnt lime-ash discharges out of the furnace through the mud hole of central shaft 7.

The utility model has the advantages that provides drying in the burning of coal process, destructive distillation, burning, the needed good condition of after-flame four-stage, and can carry out rational air distribution, therefore sufficient combustion will thoroughly change the phenomenon of over-emitting black exhaust and waste burning, to changing environmental pollution, will play obvious effect. Simultaneously it also have simple in structure, the life-span is long, cost is low, mechanization degree is high, the advantage such as easy to operate. It will become the desirable substitute products of fixed grate.

Claims

1, a kind of rotary reciprocating fire grate, it includes feeder, and transmission mechanism and fire grate is characterized in that:

A, fire grate are divided into main row 5 and secondary row's 4 two parts, its edge is equipped with the gear teeth, hold concurrently and be driven pulley, main row 5 and secondary row 4 are installed on the central shaft 7, central shaft is a hollow-core construction, main row 5 and secondary row 4 are driven by two non-circular gears (driving wheel 3) respectively, and two driving wheels 3 are contained on the same axle, and make it differ certain angle on the installation location;

B, master row 5 and secondary row's 4 disc number equates, and the interleaved arrangement, and top is concordant, so that lay fire grate segment 2;

C, fire grate segment 2 are installed on main row 5 and secondary row's 4 the disc, the vertical view of fire grate segment 2 is impeller shape curve, the cross section indentation of fire grate segment 2, one end of fire grate segment 2 is fixed on main row 5 and secondary row's 4 the disc, its outer fixing point adopts circumferential fixed form, and interior fixing point adopts the hoop fixed form, and the other end of fire grate segment is overlapped on another fire grate segment 2, see that on the whole fire grate segment is from having an angle of crater to the center all around.

2, fire grate according to claim 1 is characterized in that feeder can adopt rotating manner, reciprocating manner or mode of vibration, and when adopting rotating manner, it and driving wheel 3 are contained on the same axle, and by speed changer 6 transmissions, feeder is installed in fire grate edge.

3, fire grate according to claim 2 is characterized in that being provided with the ring-type air vent 9 that satisfies different combustion phases needs on fire grate segment 2.