CN213810595U - External combustion type straw direct-fired boiler - Google Patents

Abstract

The utility model relates to an external combustion type straw direct-fired boiler, which belongs to a boiler using plant straws as fuel. Including the blevile of push device, push away the material speed reducer, the speed reducer of unloading, the tripper device, the material loading speed reducer, the material loading device, the traveling grate stoker, the flue export, air heater and slagging-off machine, a decline formula combustion chamber is add to boiler main part afterbody below, reciprocal grate speed reducer and reciprocal grate fixed connection are inside the decline formula combustion chamber, the combustion-supporting stove arch of oblique form sets up in the top of decline formula combustion chamber, and stretch into inside the furnace, set up overgrate air bellows in the place ahead of decline formula combustion chamber, there is the exhaust vent on this overgrate air bellows orientation decline formula combustion chamber's the side, overgrate air tuber pipe one end is connected with air heater, the other end is connected with overgrate air bellows. The advantage is novel structure, can utilize this kind of extensive heat energy resource of plant straw in a large number, and the effectual plant straw ash of collecting after the burning makes farmland fertilizer repayment society.

Description

External combustion type straw direct-fired boiler

Technical Field

The utility model belongs to a boiler using plant straws as fuel, in particular to an external combustion type straw direct-fired boiler.

Background

At present, the pollution of plant straws to the environment becomes a prominent problem for controlling the air environment quality in China, which is mainly caused by low reutilization rate of the plant straws. The best and most direct utilization mode of the plant straws is combustion, however, various existing boilers utilizing biomass combustion have the problems of high biomass reprocessing cost, incomplete combustion technology, low thermal efficiency, low environmental protection index and automation degree and the like, so that a large amount of plant straws cannot be fully utilized, and the biomass boilers are difficult to popularize.

Disclosure of Invention

The utility model provides an external combustion type straw direct-fired boiler, which solves the problem that a large amount of plant straws cannot be fully utilized and the biomass boiler is difficult to popularize.

The utility model adopts the technical proposal that: the boiler comprises a pusher device, a pushing speed reducer, an unloading speed reducer, an unloader device and a loading speed reducer, wherein the pusher device, the pushing speed reducer, the unloading speed reducer, the unloader device and the loading speed reducer are arranged in the loader device, the loading device is connected with a feeding port at the lower part of a boiler main body, a chain grate speed reducer and a base of a chain grate are arranged at the lower part of the boiler main body, a flue outlet is connected at the rear upper part of the boiler main body, an air preheater is connected with a flue outlet, a deslagging speed reducer is arranged at the top of a deslagging speed reducer, a deslagging speed reducer is arranged at the bottom of the boiler main body, a descending combustion chamber is additionally arranged below the tail part of the boiler main body, the reciprocating grate speed reducer and the reciprocating grate are fixedly connected inside the descending combustion chamber, an inclined combustion-supporting furnace arch is arranged above the descending combustion chamber and extends into a hearth, a secondary air bellow is arranged in front of the descending combustion chamber, an air outlet hole is arranged on the side surface of the secondary air bellow facing the descending combustion chamber, one end of the secondary air pipe is connected with the air preheater, The other end is connected with a secondary air bellow.

And a material guide plate is fixedly connected to the upper part outside the feeding hole.

The maintenance platform is connected to the upper part of the front surface of the boiler main body.

The utility model has the advantages of novel structure, not only being capable of utilizing a large amount of plant straws which are wide heat energy resources, avoiding the behavior that the plant straws are illegally combusted in the field, but also being capable of effectively collecting the plant straw ash after the combustion to prepare farmland organic fertilizer to feed back to the society, changing waste into valuable, preserving the limited coal resources, and the green environment protection concept runs through the whole process,

drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a left side view of fig. 1.

Detailed Description

The boiler comprises a pusher device 2, a pushing speed reducer 3, a discharging speed reducer 4, a discharger device 5 and a feeding speed reducer 6, wherein the pusher device 1 is arranged in the feeder device 1, the feeder device 1 is connected with a feed inlet 7 at the lower part of a boiler main body 9, a chain grate speed reducer 13 and a base of a chain grate 14 are arranged at the lower part of the boiler main body 9, a flue outlet is connected with the rear upper part of the boiler main body 9, an air preheater 12 is connected with a flue outlet 11 to form a smoke exhaust channel, the deslagging speed reducer 1 is arranged at the top of a deslagging machine 19, the deslagging machine 19 is arranged at the bottom of the boiler main body 9, a descending combustion chamber 20 is additionally arranged below the tail part of the boiler main body 9, a reciprocating grate speed reducer 15 and a reciprocating grate 17 are fixedly connected inside the descending combustion chamber, an inclined combustion-supporting arch 10 is arranged above the descending combustion chamber 20 and extends into a hearth 21, and a secondary air bellow 16 is arranged in front of the descending combustion chamber, the secondary air bellows is provided with an air outlet on the side facing the descending combustion chamber, one end of the secondary air pipe 22 is connected with the air preheater 12, and the other end is connected with the secondary air bellows.

And a material guide plate 23 is fixedly connected to the upper part of the outer part of the feeding hole 7.

The maintenance platform 8 is attached to the upper front portion of the boiler main body 9.

Principle of operation

The straw fuel package 24 is pushed into the unloader device 5 through the feeder device 1 and the pusher device 2, the straw fuel package 24 enters the boiler feed port 7 under the pushing of the feeding speed reducer 6, the outer diameter of the straw fuel package is the same as the inner diameter of the boiler feed port 7, after the previous straw fuel package enters the boiler body from the feed port, the next straw fuel package is immediately plugged into the feed port to stop the entering of oxygen, so that the normal combustion of the fuel package in the hearth is ensured, the generation of fly ash and broken slag in the process of feeding fuel into the hearth is avoided, and the clean environment of a boiler room is maintained;

the straw fuel package 24 is primarily combusted on the chain grate 14 at the bottom of the boiler main body 9, the chain grate is arranged on the base of the chain grate, the combustion is pushed by the chain grate reducer 13, the combusted straw fuel package 24 falls onto the reciprocating grate 17 of the descending combustion chamber 20, the core material area of the fuel package is completely opened under the action of gravity, the fuel package continues to be fully combusted under the action of the secondary air bellows 16 through the operation of the reciprocating grate reducer 15 until the fuel is completely combusted, the secondary air is preheated by the air preheater 12 through the secondary air duct 22, the flue gas is blocked by the lower wall of the furnace inner downward inclined furnace arch 10, the combustible substances which are not completely combusted in the flue gas are further combusted, the generation amount of pollutants is reduced, the flue gas enters the rear smoke chamber through the front smoke chamber and the threaded smoke tube and then enters the air preheater 12 through the flue outlet 11, and the flue gas is sent to the dust removal device by the draught fan, the purified flue gas is discharged into the ambient air through a chimney, the burnt flue gas enters a slag remover 19, and the flue gas is conveyed into a packaging bag, bagged and stored; the maintenance platform 8 is an operation platform for maintaining the boiler 9.

Claims (3)

1. The utility model provides an external combustion formula straw direct combustion boiler, pusher device, material pushing speed reducer, the speed reducer of unloading, the unloader device and material loading speed reducer are installed in the pusher device, and the feed inlet of feeder device and boiler main part lower part links to each other, and the pedestal mounting of chain grate speed reducer and chain grate is in boiler main part lower part, and upper portion behind the boiler main part is exported to the flue, and air heater links to each other with the flue export, and the slagging-off speed reducer is adorned at slagging-off machine top, and the slagging-off machine is installed in boiler main part bottom, its characterized in that: the boiler comprises a boiler body, a descending combustion chamber, a reciprocating grate speed reducer, a reciprocating grate, an inclined combustion-supporting furnace arch, a secondary air bellow, an air outlet, an air preheater and a secondary air bellow, wherein the descending combustion chamber is additionally arranged below the tail part of the boiler body, the reciprocating grate speed reducer and the reciprocating grate are fixedly connected inside the descending combustion chamber, the inclined combustion-supporting furnace arch is arranged above the descending combustion chamber and extends into a hearth, the secondary air bellow is arranged in front of the descending combustion chamber, one end of the secondary air bellow, facing the descending combustion chamber, is provided with an air outlet, one end of the secondary air pipe is connected with the air preheater, and the other end of the secondary air pipe is connected with the secondary air bellow.

2. The external combustion straw direct-fired boiler of claim 1, wherein: and a material guide plate is fixedly connected to the upper part outside the feeding hole.

3. The external combustion straw direct-fired boiler of claim 1, wherein: the maintenance platform is connected to the upper part of the front surface of the boiler main body.

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