CN111536546A

CN111536546A - Uniform feeding device of biomass boiler

Info

Publication number: CN111536546A
Application number: CN202010515995.0A
Authority: CN
Inventors: 曹希新; 刘红斌; 周跃兵; 牛庆好; 刘玉葵; 邹友民
Original assignee: Hunan Chang Hong Boiler Technology Co ltd
Current assignee: Hunan Chang Hong Boiler Technology Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2020-08-14

Abstract

The utility model provides a biomass boiler uniform feeding device, relate to the boiler technology field, it includes the feeder hopper, connect the feed bin of feeder hopper and connect the play hopper of feed bin, it is used for connecting the boiler to go out the hopper, the feeder hopper is connected in the rear portion on feed bin top, it connects in the front portion of feed bin bottom to go out the hopper, be equipped with conveyer belt and homocline ware in the feed bin, the conveyer belt transmission is connected with the driving roller, the driving roller is connected with conveying motor through the speed reducer transmission, the homocline ware is located between conveyer belt and the feeder hopper, be equipped with the spray pipe in the feed bin, the spray pipe is located the upper portion of feed bin front side, the spray pipe is parallel with the width direction of conveyer belt, evenly laid a plurality of nozzles. The invention has better feeding uniformity and can prevent the situations of material blockage and backfire combustion in the feeding device to the maximum extent.

Description

Uniform feeding device of biomass boiler

Technical Field

The invention relates to the technical field of boilers, in particular to a uniform feeding device of a biomass boiler.

Background

The biomass boiler is a novel energy-saving device. The equipment uses cheap biomass with wide sources as fuel, has the advantages of high thermal efficiency, no pollution, low emission and reasonable structure, and can save 30 to 60 percent of running cost compared with fuel oil, fuel electricity and fuel gas, thereby being widely used in various power plants, chemical industry, smelting and other industries.

Because biomass fuel possesses the characteristics that size, shape are different, cause biomass boiler feed inhomogeneous easily, the insufficient problem of burning, in the use, the card material, the unstable condition of feed speed take place occasionally, can influence the normal operating of boiler when serious.

For some large boilers, the non-uniformity of the feed material seriously affects the thermal efficiency of the boiler and causes serious emission of atmospheric pollutants, and also degrades the quality of the boiler steam. Some existing boiler manufacturing enterprises adopt a spiral feeding system to feed large biomass boilers, but users often complain about the problems of high manufacturing cost and high failure rate of the spiral feeding system. In addition, because the temperature in the hearth is higher, the connecting part of the feeding device and the boiler can be in a higher-temperature environment, and the hidden danger of backfire combustion in the feeding device is further formed.

Disclosure of Invention

The invention aims to provide a uniform feeding device of a biomass boiler, which has better feeding uniformity and can prevent the situations of material blockage and tempering combustion in the feeding device to the greatest extent.

In order to solve the technical problems, the invention adopts the following technical scheme: a biomass boiler uniform feeding device comprises a feeding hopper, a storage bin connected with the feeding hopper and a discharge hopper connected with the storage bin, wherein the discharge hopper is used for being connected with a boiler, the feeding hopper is connected to the rear part of the top end of the storage bin, the discharge hopper is connected to the front part of the bottom end of the storage bin, a conveying belt and a material homogenizer are arranged in the storage bin, the conveying belt is in transmission connection with a driving roller, the driving roller is in transmission connection with a conveying motor through a speed reducer, the material homogenizer is positioned between the conveying belt and the feeding hopper, the material homogenizer comprises a material homogenizing roller, a plurality of scraping cards arranged on the outer wall of the material homogenizing roller and a material homogenizing motor driving the material homogenizing roller to rotate, a water spray pipe is arranged in the storage bin, the water spray pipe is positioned on the upper part of the front side of the storage bin, the water spray pipe is parallel to the width direction, the water-cooling jacket is provided with a water inlet and a water outlet.

Further, the feeder hopper is hollow quadrangular prism, the antetheca and the back wall of feeder hopper are the slope form and are parallel to each other, the top of feeder hopper antetheca medial surface is equipped with the striker plate, the striker plate is located the top of homocline ware, the striker plate is the slope form and the incline direction is opposite with the incline direction of feeder hopper back wall.

The material baffle is a strip-shaped plate with a triangular cross section, and the length of the material baffle is matched with the width of the front wall of the feed hopper.

Preferably, the spray pipe is positioned right above the discharge hopper.

More preferably, a funnel for collecting excess materials is further arranged below the rear end of the conveying belt.

More preferably, the bin is mounted on a support.

More preferably, the side wall of the storage bin is provided with a viewing window.

More preferably, the rear side of the stock bin is provided with a hand staircase, and the outside of the stock bin is provided with an overhaul platform connected with the hand staircase.

The invention has the beneficial effects that: biomass fuel can fall on the conveyer belt after the feeding from the feeder hopper, and the conveyer belt can evenly be kicked open accumulational biomass fuel through the stirring effect of homocline ware toward the in-process of carrying biomass fuel forward to because the homocline ware sets up between conveyer belt and feeder hopper, make a considerable part biomass fuel just can be stirred evenly before falling to the conveyer belt and open, thereby prevent to take place card material to very big degree.

The running speed of the conveying belt can be controlled by the speed reducer, so that the feeding speed can be adjusted according to the steam pressure and the gas consumption of the boiler, and the feeding uniformity of the feeding device is relatively better by combining the material stirring effect of the material homogenizer.

Because the upper portion of front side is equipped with the spray pipe in the feed bin, its spun water smoke can effectively reduce the inside temperature of feeder front end, and the temperature that reduces out the hopper is carried out the heat exchange by cold water and play hopper by water-cooling jacket again to can prevent the inside tempering burning's of feeder the condition to a great extent, the water supply system of boiler can be connected to the water inlet and the delivery port of water-cooling jacket in addition, thereby preheat for the water that sends into in the boiler, reach the effect of make full use of energy consumption.

Drawings

FIG. 1 is a schematic overall structure diagram in an embodiment of the present invention;

FIG. 2 is a front perspective schematic view of the overall structure in an embodiment;

FIG. 3 is a schematic view of the homogenizer in the embodiment;

FIG. 4 is a schematic view of the structure of the sprinkler pipe in the embodiment.

The reference signs are:

1-feed hopper 2-storage bin 3-discharge hopper

4-conveyer belt 4 a-driving roller 4 b-speed reducer

4c conveying motor 5 homogenizer 5a homogenizing roller

5b scraping clamp 6 spray pipe 6a nozzle

7-water cooling jacket 8-striker plate 9-funnel

10-bracket 11-observation window 12-escalator.

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 invention.

As shown in figures 1-4, a uniform feeding device of a biomass boiler comprises a feed hopper 1, a storage bin 2 connected with the feed hopper 1 and a discharge hopper 3 connected with the storage bin 2, wherein the discharge hopper 3 is used for connecting a boiler, the feed hopper 1 is connected with the rear part of the top end of the storage bin 2, the discharge hopper 3 is connected with the front part of the bottom end of the storage bin 2, a conveyer belt 4 and a material equalizer 5 are arranged in the storage bin 2, the conveyer belt 4 is in transmission connection with a driving roller 4a, the driving roller 4a is in transmission connection with a conveyer motor 4c through a speed reducer 4b, the material equalizer 5 is positioned between the conveyer belt 4 and the feed hopper 1, the material equalizer 5 comprises an equalizing roller 5a, a plurality of scraping cards 5b arranged on the outer wall of the material equalizing roller 5a and an equalizing motor for driving the material equalizing roller 5a to rotate, a water spray pipe 6 is arranged in the storage bin 2, a plurality of nozzles 6a are uniformly distributed on the pipe wall of the spray pipe 6, the outer wall of the discharge hopper 3 is coated with a water-cooling jacket 7, and the water-cooling jacket 7 is provided with a water inlet and a water outlet.

The even feeder apparatus of biomass boiler that above-mentioned embodiment provided is at the during operation, biomass fuel gets into and falls on conveyer belt 4 from feeder hopper 1, and conveyer belt 4 can evenly be stirred piled up biomass fuel through the stirring effect of homocline 5 in the in-process of carrying biomass fuel forward to because homocline 5 sets up between conveyer belt 4 and feeder hopper 1 for a considerable portion of biomass fuel just can be stirred evenly before falling to conveyer belt 4 and is opened, thereby prevents to take place the card material to very big degree. In the feeding process, the running speed of the conveying belt 4 can be controlled by the speed reducer 4b, so that the feeding speed can be adjusted according to the steam pressure and the gas consumption of the boiler, and the feeding uniformity of the feeding device is relatively better by combining the material stirring effect of the material homogenizer 5.

Because the upper portion of front side is equipped with spray pipe 6 in feed bin 2, nozzle 6a on the spray pipe 6 can set up to 10, its spun water smoke can effectively reduce the inside temperature of feeder front end, carry out the heat exchange by water-cooling jacket 7 with play hopper 3 and reduce the temperature of play hopper 3 again, thereby can prevent the inside condition of backfire burning of feeder in the very big degree, and the water supply system of boiler can be connected to the water inlet and the delivery port of water-cooling jacket 7, thereby preheat for the water that sends into the boiler, reach the effect of make full use of energy consumption.

It should be noted that, as those skilled in the art should know, the temperature of the furnace in the boiler can reach one thousand degrees, so the discharge hopper 3 in the above embodiment can make itself and the front part of the bunker 2 have higher internal environment temperature due to the connection with the boiler, and then the water continuously sprayed from the nozzle 6a of the spray pipe 6 can be rapidly atomized, so that the biomass fuel can hardly be wetted to affect the quality of the fuel, and meanwhile, the inside of the front end of the bunker 2 can be effectively cooled, on this basis, the position of the spray pipe 6 can be set right above the discharge hopper 3, and this enables the cooling effect range formed by the water mist to be also applied to the discharge hopper 3 to a certain extent.

In fact, the feeding device provided by the embodiment is mainly directed to biomass fuel with relatively large volume, such as biomass fuel in the form of wood strips and the like, but not granular biomass fuel, so that there is no worry about the easy humidifying effect of water mist on the fuel.

Further, feeder hopper 1 is hollow quadrangular prism, the antetheca and the back wall of feeder hopper 1 are the slope form and are parallel to each other, the top of 1 antetheca medial surface of feeder hopper is equipped with striker plate 8, striker plate 8 is located the top of equalizer 5, striker plate 8 is slope form and the incline direction is opposite with the incline direction of 1 back wall of feeder hopper, through setting up striker plate 8, make partly fuel among the feeding process can strike on striker plate 8 and fall down again, can make the feed rate on feeder hopper 1 upper portion a little slower like this, and make the fuel amount that gets into 1 lower part of feeder hopper can be a little relatively, feed rate can be a little relatively fast, thereby prevent that the junction area between feeder hopper 1 and feed bin 2 from taking place the card material.

It should be understood by those skilled in the art that because there are different lengths and sizes of the biomass fuel used in the present embodiment, when a large amount of biomass fuel is fed at a faster speed, it will directly fall between the feeding hopper 1 and the storage bin 2 and form a phenomenon that a large amount of fuel is accumulated on the homogenizer 5, so that there is a certain probability that the homogenizer 5 will be jammed, and after the baffle plate 8 is added, and the baffle plate 8 is disposed above the homogenizer 5, the feeding speed and the material passing amount can be locally limited, so that the lower portion of the feeding hopper 1 can not only feed at a relatively faster speed, but also reduce a certain feeding amount, so as to play a more obvious role of preventing jamming, and because the shape design of the feeding hopper 1 is a form in which the front wall and the rear wall are inclined towards the same direction, the feeding speed and the feeding amount of the lower portion of the feeding hopper 1 can also slide to the homogenizer 5 even though they are slowed down, let the homocline ware 5 play the effect of stirring to the fuel in the feeder hopper 1 (promptly the homocline ware 5 still can possess the effect of stirring to the fuel in the feeder hopper 1), compare in not setting up striker plate 8, the phenomenon of card material or homocline ware 5 jamming will reduce a lot, and feed speed and efficiency are more stable.

And boiler feed system among the prior art adopts the structure of spiral feed form more, its card material phenomenon is comparatively common, it is higher to lead to the fault rate, some conveyer belt's that can see on the market feed system is then because the position that does not set up homocline ware or homocline ware is far away apart from with the position of feeder hopper, thereby make and still not reach the feed device that this application provided in the effect of homogenizing fuel and realizing even feed, this is because the homocline ware that sets up in the feed device of this application can both carry out more obvious stirring to falling before the conveyer belt and the fuel that falls onto the conveyer belt on the one hand, on the other hand also can effectively reduce the card material phenomenon that takes place between feeder hopper 1 and the feed bin 2 through striker plate 8's structure.

On the basis, the material baffle plate 8 is a strip-shaped plate with a triangular cross section, and the length of the material baffle plate 8 is matched with the width of the front wall of the feed hopper 1.

Preferably, a funnel 9 for collecting the residual materials is arranged below the rear end of the conveying belt 4, and the residual materials which do not fall into the discharging hopper 3 are collected by the funnel 9 to be used for the subsequent use, so that the resources are saved sufficiently.

In addition, in this embodiment, as more preferably, the feed bin 2 is installed on the support 10, and the lateral wall of the feed bin 2 is provided with the observation window 11, makes things convenient for the staff to observe the condition in the feed bin 2. The rear side of feed bin 2 is equipped with hand staircase 12, and the outside of feed bin 2 is equipped with the maintenance platform of connecting hand staircase 12, can make things convenient for the staff to overhaul whole feeder and maintain.

In addition, as shown in fig. 2, the feeding devices provided in this embodiment may also be arranged in two groups in parallel, the top ends of the adjacent sides of the two feeding hoppers 1 are tightly secured to make the blanking smooth, and one escalator 12 is provided.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.

Claims

1. The utility model provides a biomass boiler uniform feeding device, includes feed hopper (1), connects feed bin (2) of feed hopper (1) and goes out hopper (3) of connecting feed bin (2), go out hopper (3) and be used for connecting the boiler, its characterized in that: the feed hopper (1) is connected to the rear part of the top end of the feed bin (2), the discharge hopper (3) is connected to the front part of the bottom end of the feed bin (2), a conveying belt (4) and a material equalizer (5) are arranged in the feed bin (2), the conveying belt (4) is in transmission connection with a transmission roller (4 a), the transmission roller (4 a) is in transmission connection with a conveying motor (4 c) through a speed reducer (4 b), the material equalizer (5) is positioned between the conveying belt (4) and the feed hopper (1), the material equalizer (5) comprises a material equalizing roller (5 a), a plurality of scraping cards (5 b) arranged on the outer wall of the material equalizing roller (5 a) and a material equalizing motor for driving the material equalizing roller (5 a) to rotate, a water spray pipe (6) is arranged in the feed bin (2), the water spray pipe (6) is positioned on the upper part of the front side of the feed bin (2), and the water spray pipe (6) is parallel, the spray pipe is characterized in that a plurality of nozzles (6 a) are uniformly distributed on the pipe wall of the spray pipe (6), the outer wall of the discharge hopper (3) is coated with a water-cooling jacket (7), and the water-cooling jacket (7) is provided with a water inlet and a water outlet.

2. The biomass boiler uniform feeding device according to claim 1, characterized in that: feeder hopper (1) is hollow quadrangular prism, the antetheca and the back wall of feeder hopper (1) are the slope form and are parallel to each other, the top of feeder hopper (1) antetheca medial surface is equipped with striker plate (8), striker plate (8) are located the top of homocline ware (5), striker plate (8) are the slope form and the incline direction is opposite with the incline direction of feeder hopper (1) back wall.

3. The biomass boiler uniform feeding device according to claim 2, characterized in that: striker plate (8) are the transversal strip shaped plate who personally submits triangle-shaped, the length of striker plate (8) and the width phase-match of feeder hopper (1) antetheca.

4. The biomass boiler uniform feeding device according to claim 1, characterized in that: the water spray pipe (6) is positioned right above the discharge hopper (3).

5. The biomass boiler uniform feeding device according to claim 1, characterized in that: a funnel (9) for collecting excess materials is further arranged below the rear end of the conveying belt (4).

6. The biomass boiler uniform feeding device according to claim 1, characterized in that: the storage bin (2) is arranged on the support (10).

7. The biomass boiler uniform feeding device according to claim 6, characterized in that: the lateral wall of feed bin (2) is equipped with observation window (11).

8. The biomass boiler uniform feeding device according to claim 7, characterized in that: the rear side of the stock bin (2) is provided with a hand staircase (12), and the outside of the stock bin (2) is provided with an overhaul platform connected with the hand staircase (12).