CN218972901U

CN218972901U - Combustion type hot-blast stove capable of reducing positive pressure phenomenon in stove

Info

Publication number: CN218972901U
Application number: CN202223217397.9U
Authority: CN
Inventors: 王前胜; 王邓卫; 王成成
Original assignee: Dongguan Weisheng Machinery Equipment Technology Co ltd
Current assignee: Dongguan Weisheng Machinery Equipment Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-05
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a combustion type hot blast stove for reducing the positive pressure phenomenon in a stove, which relates to the technical field of hot blast stoves, wherein a screw conveyor is arranged below a feed opening of a storage bin, an inclined guide plate is arranged between a discharge opening of the screw conveyor and a fuel opening of a combustion cavity, a crushing assembly is arranged on a guide inclined surface of the guide plate, the crushing assembly comprises at least 2 layers of crushing cutter groups, each layer of crushing cutter group consists of a plurality of crushing cutters, a passing channel is formed between two adjacent crushing cutters, each crushing cutter comprises a cutter body formed on the guide inclined surface of the guide plate, crushing cutter edges are arranged at the upper part of the cutter body in a staggered manner, the crushing cutter edges of the crushing cutters of each two adjacent layers of crushing cutter groups are positioned in the passing channel of the last layer of crushing cutter group, and the fuel falling from the discharge opening of the screw conveyor is agglomerated into a dispersed powder after striking the cutter edges. Effectively avoiding the combustion and deflagration phenomenon caused by caking when the fuel powder is conveyed by the screw conveyor.

Description

Combustion type hot-blast stove capable of reducing positive pressure phenomenon in stove

Technical Field

The utility model relates to the technical field of hot blast stoves, in particular to a combustion type hot blast stove capable of reducing the phenomenon of positive pressure in the stove.

Background

The applicant filed for patent No. 201520178587.5 on day 3 and 28 of 2015 and issued the chinese utility model "automatic dedusting biological particle hot blast stove", proposes that "a screw conveyor 7 is disposed below the funnel 6, one end of the screw conveyor 7 is connected with the lower end of the funnel 6, and the other end sequentially penetrates through the partition plate 1 and the side wall of the combustion chamber 2 and extends into the bore of the combustion chamber 2", and automatic feeding can be performed by the screw conveyor 7.

On the basis, the applicant improves the structure, and applies for and grants the Chinese utility model 'an automatic dust removal biological particle hot blast stove' with patent number 201720222987.0 in 3/8 of 2017, and as can be seen from the fact that, in combination with fig. 1, the feeder 4 (spiral conveying type feeding) can convey the fuel powder on the storage bin 1, and a downward inclined plate between the feeder 4 and the combustion chamber 2 is used for guiding the fuel, namely, the positive pressure phenomenon in the stove is reduced by a feeding mode of spiral feeding and free sliding of the inclined plate of the feeder 4.

The applicant found that, due to the difference in the degree of dryness of the fuel dust, when the fuel dust with low partial dryness appears, the fuel dust is easy to agglomerate after being fed by the screw feeder (feeder), so that the fuel dust cannot scatter into powder when sliding on the inclined plate, deflagration can be generated when the fuel dust enters the combustion chamber to burn, the deflagration can cause the positive pressure phenomenon in the furnace, the positive pressure effect in the furnace is the smoke discharging effect to the greatest extent, and therefore, the hot blast stove needs to be improved to prevent the positive pressure phenomenon in the furnace caused by feeding, extrusion and agglomeration.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a protective sleeve automatic hemming device and a method thereof.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the combustion type hot blast stove for reducing the positive pressure phenomenon in the stove comprises a box body, wherein a feed bin, a combustion chamber and a heat exchange chamber are arranged in the box body, flue gas generated by combustion in the combustion chamber is finally fed into the heat exchange chamber through an air guide assembly, a smoke outlet is formed in the heat exchange chamber, a heat exchanger is arranged in the heat exchange chamber, the heat exchanger is provided with an air inlet connected to the outside of the box body and a hot air outlet connected to the outside of the box body, a screw conveyor is arranged below a feed opening of the feed bin, wherein the screw conveyor is horizontally arranged and enables a feed opening of the screw conveyor to correspond to a feed opening of the feed bin above, an inclined guide plate is arranged between a discharge opening of the screw conveyor and a fuel opening of the combustion chamber, and the discharge opening of the screw conveyor is higher than the fuel opening of the combustion chamber; a material guiding inclined plane of the material guiding plate is provided with a material crushing assembly, the material crushing assembly comprises at least 2 layers of material crushing cutter groups which are arranged from top to bottom, and the material crushing cutter group at the uppermost layer corresponds to a material outlet of the screw conveyor; each layer of crushing cutter group is formed by a plurality of crushing cutters which are arranged along the width direction of the material guide plate at intervals, wherein a material passing channel is formed between every two adjacent crushing cutters, each crushing cutter comprises a cutter body formed on the material guide inclined plane of the material guide plate, crushing blades corresponding to a discharge hole of the screw conveyor are arranged on the upper part of the cutter body, the crushing cutters of every two adjacent layers of crushing cutter groups are arranged in a staggered mode, and the crushing blades of the crushing cutters of the next layer of crushing cutter group are positioned in the material passing channel of the last layer of crushing cutter group.

As a further scheme of the utility model: the lower part of the cutter body is a material passing tip which is gradually reduced downwards, and the crushed aggregates cutting edges of the crushed aggregates cutters of the next layer of crushed aggregates cutter group are level with the material passing tip.

As a further scheme of the utility model: the relation between the number M of the crushing knives of the crushing knife set of the next layer and the number N of the crushing knives of the crushing knife set of the upper layer is m=n+1.

As a further scheme of the utility model: the upper part of the material guide plate is rotatably arranged in the box body through a rotating shaft, the lower part of the material guide plate is propped against the edge of the fuel port of the combustion chamber, and a vibrator for shaking the material guide plate is also arranged in the box body.

As a further scheme of the utility model: the air guide assembly comprises a cyclone dust collector, an air inlet of the cyclone dust collector is communicated with a smoke outlet of the combustion chamber through a pipeline, and an air outlet of the cyclone dust collector is communicated with a smoke inlet of the heat exchange chamber through a pipeline.

Compared with the prior art, the utility model has the following beneficial effects: the fuel caking that falls from screw conveyer's discharge gate forms the powder that collapses after striking the cutting edge, effectively avoids the burning deflagration phenomenon that the fuel forms the caking and leads to when being carried by screw conveyer.

Drawings

FIG. 1 is a front elevational view of the structure of the present utility model;

FIG. 2 is a side view of the structure of the present utility model, wherein the left-right direction of the guide plate in the drawing is the width direction of the guide plate;

fig. 3 is an enlarged schematic view of a partial structure at a in fig. 2.

Reference numerals and names in the drawings are as follows:

the box body-1 is provided with a box body,

a feed bin-2, a feed opening-21,

the combustion chamber-3, the fuel port-31,

a heat exchange cavity-4, a smoke outlet-41,

a heat exchanger-5, an air inlet-51, a hot air outlet-52,

screw conveyor-6, feeding port-61, discharging port-62,

guide plate-7, guide inclined plane-71, crushing cutter group-72, crushing cutter-73, cutter body-731, crushing blade-732, passing tip-733, passing channel-74,

a rotating shaft-8,

the vibrator-9 is provided with a vibrator,

a cyclone dust collector-10, which is arranged on the upper surface of the dust collector,

blower-11.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, a combustion type hot blast stove for reducing positive pressure in a furnace comprises a box body 1, wherein a storage bin 2, a combustion chamber 3 and a heat exchange chamber 4 are arranged in the box body 1, flue gas generated by combustion of the combustion chamber 3 is finally sent into the heat exchange chamber 4 through an air guide assembly, a smoke outlet 41 is arranged on the heat exchange chamber 4, a heat exchanger 5 is arranged in the heat exchange chamber 4, and the heat exchanger 5 is provided with an air inlet 51 connected to the outside of the box body 1 and a hot air outlet 52 connected to the outside of the box body 1.

As shown in fig. 1, the air guide assembly comprises a cyclone dust collector 10, wherein an air inlet of the cyclone dust collector 10 is communicated with a smoke outlet of the combustion chamber 3 through a pipeline, and an air outlet of the cyclone dust collector 10 is communicated with a smoke inlet of the heat exchange chamber 4 through a pipeline.

The fuel enters the combustion chamber 3 to obtain flue gas with larger heat after combustion, the flue gas enters the cyclone dust collector 10 immediately, the flue gas rotates under the flow guide of the spiral guide plate of the cyclone dust collector 10, when the flue gas rotates, the dust with larger mass is separated from and attached to the inner wall of the cyclone dust collector 10 through centrifugation, the dust on the inner wall of the cyclone dust collector 10 falls under the action of gravity so as to be convenient for collection and cleaning, cleaner flue gas is obtained through rotary dust removal, and then the flue gas enters the heat exchange chamber 4 to exchange heat with air in the heat exchanger 5, and finally is discharged from the smoke outlet 41 of the heat exchange chamber.

As shown in fig. 1, the combustion type hot blast stove can be further provided with a blower 11, and the blower 11 supplies air corresponding to the air inlet of the heat exchanger 5 so as to improve the hot blast conveying efficiency.

A screw conveyer 6 is arranged below the feed opening 21 of the storage bin 2, wherein the screw conveyer 6 is horizontally arranged, a feed opening 61 of the screw conveyer 6 corresponds to the feed opening 21 of the storage bin 2 above, an inclined guide plate 7 is arranged between a discharge opening 62 of the screw conveyer 6 and a fuel opening 31 of the combustion chamber 3, and the discharge opening 62 of the screw conveyer 6 is higher than the fuel opening 31 of the combustion chamber 3. The fuel powder on the bin 2 falls into the feed port 61 of the screw conveyor 6 from the feed port 21 of the bin 2, and is conveyed by the screw conveyor 6 to the guide plate 7 below the discharge port 62 of the screw conveyor 6, and the fuel powder can slide on the inclined guide plate 7 and finally is conveyed to the fuel port 31 of the combustion chamber 3.

A material guiding inclined plane 71 of the material guiding plate 7 is provided with a material crushing assembly, the material crushing assembly comprises at least 2 layers of material crushing cutter groups 72 arranged from top to bottom, and the material crushing cutter groups 72 at the uppermost layer correspond to the discharge holes 61 of the screw conveyor 6; each layer of crushing cutter group is composed of a plurality of crushing cutters 73 which are arranged at intervals along the width direction of the material guide plate 7, wherein a material passing channel 74 is formed between every two adjacent crushing cutters, each crushing cutter 73 comprises a cutter body 731 which is formed on the material guide inclined plane 71 of the material guide plate 7, the upper part of the cutter body 731 is provided with crushing blades 732 corresponding to the discharge hole 62 of the screw conveyor 6, the crushing cutters of every two adjacent layers of crushing cutter groups are arranged in a staggered mode, and the crushing blades of the crushing cutters of the next layer of crushing cutter group are positioned in the material passing channel of the previous layer of crushing cutter group.

The fuel caking that falls from screw conveyer's discharge gate forms the powder that collapses after striking the cutting edge, effectively avoids the burning deflagration phenomenon that the fuel forms the caking and leads to when being carried by screw conveyer.

Referring to fig. 2 specifically, preferably, the relation between the number M of the crushing blades of the crushing blade set of the next layer and the number N of the crushing blades of the crushing blade set of the previous layer is m=n+1, and the fuel powder can obtain a larger blanking width at the bottom edge of the material guiding plate after passing through the multi-layer crushing blade set, so as to avoid blanking concentration.

Further, the lower part of the blade body 731 is a passing tip 733 which is gradually reduced downwards, and the crushing blade of the next crushing blade set is flush with the passing tip, so that the fuel dust can more easily reach the next crushing blade set from the last crushing blade set.

In the embodiment of the utility model, the upper part of the material guiding plate 7 is rotatably arranged in the box body 1 through a rotating shaft 8, the lower part of the material guiding plate 7 is abutted against the edge of the fuel port 31 of the combustion chamber 3, and a vibrator 9 for shaking the material guiding plate 7 is also arranged in the box body 1. The vibrator 9 may be a conventional motor vibrator, and the fuel powder is not easily adhered to the guide slope 71 to form a blockage by vibration.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The combustion type hot blast stove for reducing the positive pressure phenomenon in the stove comprises a box body, wherein a stock bin, a combustion cavity and a heat exchange cavity are arranged in the box body, flue gas generated by combustion in the combustion cavity is finally sent into the heat exchange cavity through an air guide assembly, a smoke outlet is arranged on the heat exchange cavity, a heat exchanger is arranged in the heat exchange cavity, the heat exchanger is provided with an air inlet connected to the outside of the box body and a hot air outlet connected to the outside of the box body, and the combustion type hot blast stove is characterized in that,

a screw conveyer is arranged below the discharging opening of the storage bin, wherein the screw conveyer is horizontally arranged and enables the feeding opening of the screw conveyer to correspond to the discharging opening of the storage bin above, an inclined guide plate is arranged between the discharging opening of the screw conveyer and the fuel opening of the combustion chamber, and the discharging opening of the screw conveyer is higher than the fuel opening of the combustion chamber;

a material guiding inclined plane of the material guiding plate is provided with a material crushing assembly, the material crushing assembly comprises at least 2 layers of material crushing cutter groups which are arranged from top to bottom, and the material crushing cutter group at the uppermost layer corresponds to a material outlet of the screw conveyor;

each layer of crushing cutter group is formed by a plurality of crushing cutters which are arranged along the width direction of the material guide plate at intervals, wherein a material passing channel is formed between every two adjacent crushing cutters, each crushing cutter comprises a cutter body formed on the material guide inclined plane of the material guide plate, crushing blades corresponding to a discharge hole of the screw conveyor are arranged on the upper part of the cutter body, the crushing cutters of every two adjacent layers of crushing cutter groups are arranged in a staggered mode, and the crushing blades of the crushing cutters of the next layer of crushing cutter group are positioned in the material passing channel of the last layer of crushing cutter group.

2. The combustion type hot blast stove for reducing positive pressure in a furnace according to claim 1, wherein the lower part of the knife body is a passing tip which is gradually reduced downwards, and the crushing blade of the crushing knife set of the next layer is flush with the passing tip.

3. The combustion stove for reducing the positive pressure phenomenon in a furnace according to claim 1, wherein the relation between the number M of the crushing knives of the crushing knife group of the next layer and the number N of the crushing knives of the crushing knife group of the upper layer is m=n+1.

4. The combustion type hot blast stove for reducing positive pressure in a furnace according to claim 1, wherein the upper part of the material guiding plate is rotatably arranged in the box body through a rotating shaft, the lower part of the material guiding plate is abutted against the edge of a fuel port of the combustion cavity, and a vibrator for shaking the material guiding plate is further arranged in the box body.

5. The combustion type hot blast stove for reducing positive pressure in furnace according to claim 1, wherein the air guide assembly comprises a cyclone dust collector, the air inlet of the cyclone dust collector is communicated with the smoke outlet of the combustion chamber through a pipeline, and the air outlet of the cyclone dust collector is communicated with the smoke inlet of the heat exchange chamber through a pipeline.