CN111197739A

CN111197739A - Rice husk combustion device

Info

Publication number: CN111197739A
Application number: CN201811378125.2A
Authority: CN
Inventors: 李金政
Original assignee: Yichang Jinzheng Rice Industry Co ltd
Current assignee: Yichang Jinzheng Rice Industry Co ltd
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2020-05-26

Abstract

A rice hull combustion device comprises a pulverizer, a first screw conveyor, a powder injector, a combustion furnace and a heat exchange box which are sequentially communicated; the powder shooting device comprises a first storage bin, a powder inlet pipe, an air inlet pipe and a first fan, wherein the first fan is communicated with one end of the powder inlet pipe through the air inlet pipe; still include rice husk drying device, rice husk drying device includes drying cabinet, dust remover, second screw conveyer and third screw conveyer, and the drying cabinet lower extreme passes through discharge tube intercommunication second screw conveyer feed end, and second screw conveyer discharge end intercommunication rubbing crusher feed inlet has annular steam pipe outside the drying cabinet, and annular steam pipe passes through many steam branch pipes and drying cabinet intercommunication, and exhaust pipe intercommunication steam branch pipe, third screw conveyer discharge end intercommunication drying cabinet, and the dust remover passes through pipeline intercommunication drying cabinet. The invention is used for solving the problem of insufficient combustion of the rice hulls.

Description

Rice husk combustion device

Technical Field

The invention relates to a rice husk combustion device.

Background

At present, most of rice hulls are directly burnt, so that not only is a large amount of resources wasted, but also air pollution is caused, in order to solve the problem, a combustion furnace is generally adopted for burning, for example, the patent number is 'CN 205447767U', the name is 'a burner which takes the rice hulls as fuel to heat a boiler', the rice hulls are directly burned, but because the grain size of the rice hulls is large, the contact area with flame is small, the rice hulls cannot be quickly burned out, some rice hulls which are not burned out exist in discharged smoke, and therefore the burning is insufficient.

Disclosure of Invention

The invention aims to solve the technical problem of a rice hull combustion device, which is used for solving the problem of insufficient combustion of rice hulls.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a rice hull combustion device comprises a pulverizer, a first screw conveyor, a powder injector, a combustion furnace and a heat exchange box which are sequentially communicated;

the powder shooting device comprises a first storage bin, a powder inlet pipe, an air inlet pipe and a first fan, wherein the first fan is communicated with one end of the powder inlet pipe through the air inlet pipe;

the combustion furnace comprises a furnace body, a burner is arranged at the bottom of the furnace body, a housing is arranged outside the furnace body, a heat insulation layer is arranged between the housing and the furnace body, one end of the powder inlet pipe, which is far away from the first fan, is communicated with the furnace body along the tangential direction of the furnace body, and the upper end of the furnace body is communicated with an exhaust pipe;

the heat exchange box comprises a box body, a water tank is arranged in the box body, the two ends of the water tank are respectively communicated with a water inlet pipe and a water outlet pipe, a plurality of heat exchange pipes are arranged in the water tank, the two ends of each heat exchange pipe are respectively communicated with the upper end surface and the lower end surface of the water tank, gaps are respectively arranged between the upper end surface and the lower end surface of the water tank and the inner wall surface of the box body, a plurality of partition plates are respectively arranged in each gap, each partition plate separates the gap into a plurality of cavities, a labyrinth type air passing channel is formed in the box body by each cavity and each heat exchange pipe, one.

Still include rice husk drying device, rice husk drying device includes drying cabinet, dust remover, second screw conveyer and third screw conveyer, and the drying cabinet lower extreme passes through discharge tube intercommunication second screw conveyer feed end, and second screw conveyer discharge end intercommunication rubbing crusher feed inlet has annular steam pipe outside the drying cabinet, and annular steam pipe passes through many steam branch pipes and drying cabinet intercommunication, and exhaust pipe intercommunication steam branch pipe, third screw conveyer discharge end intercommunication drying cabinet, and the dust remover passes through pipeline intercommunication drying cabinet.

A furnace bridge is arranged at the lower part of the furnace body, and a furnace body cavity below the furnace bridge is communicated with the second fan through a pipeline.

The invention has the beneficial effects that: the rice hulls are refined into powder by a pulverizer, and the rice hull powder is uniformly dispersed in a furnace body in an air blowing mode, so that the contact area between the rice hulls and flame and air is enlarged, the combustion effect of the rice hulls is greatly improved, the pollution to the air is reduced, and the combustion heat can be recycled by a heat exchanger; on the other hand, the rice hull drying device can utilize hot flue gas generated by burning rice hulls to dry and preheat the rice hulls, remove redundant moisture in the rice hulls, avoid agglomeration of rice hull powder, improve the burning effect of the rice hulls and purify the flue gas.

Drawings

The invention is further described below with reference to the accompanying drawings:

figure 1 is a schematic structural view of the present invention,

FIG. 2 is a schematic view of a partially enlarged structure of the present invention,

FIG. 3 is a schematic sectional view of the furnace body according to the present invention,

fig. 4 is a schematic cross-sectional view of the drying box according to the present invention.

In the figure: the device comprises a pulverizer 1, a powder injector 3, a combustion furnace 4, a heat exchange box 5, a rice hull drying device 6, a second fan 7, a first screw conveyor 21, a second screw conveyor 22, a third screw conveyor 23, a first bin 31, a powder inlet pipe 32, an air inlet pipe 33, a first fan 34, a first discharger 35, a furnace body 41, a cover shell 42, a heat insulation layer 43, an exhaust pipe 44, a combustor 45, a box body 51, a water tank 52, a heat exchange pipe 53, a partition plate 54, a cavity 55, a water outlet pipe 56, a water inlet pipe 57, a smoke exhaust pipe 58, a drying box 61, a dust remover 62, a hot air pipe 63, a hot air branch pipe 64 and a furnace bridge 71.

Detailed Description

As shown in fig. 1 to 4, a rice husk burning device comprises a pulverizer 1, a first screw conveyor 21, a powder injector 3, a burning furnace 4 and a heat exchange box 5 which are communicated in sequence;

the powder shooting device 3 comprises a first storage bin 31, a powder inlet pipe 32, an air inlet pipe 33 and a first fan 34, wherein the first fan 34 is communicated with one end of the powder inlet pipe 32 through the air inlet pipe 33, the first storage bin 31 is communicated with the middle part of the air inlet pipe 33 through a discharging pipe, and a first discharger 35 is arranged on the discharging pipe;

the combustion furnace 4 comprises a furnace body 41, a burner 45 is arranged at the bottom of the furnace body 41, the fire outlet direction of the burner 45 faces upwards, a cover 42 is arranged outside the furnace body 41, a heat insulation layer 43 is arranged between the cover 42 and the furnace body 41, one end of the powder inlet pipe 32, which is far away from the first fan 34, is communicated with the furnace body 41 along the tangential direction of the furnace body 41, and an exhaust pipe 44 is communicated with the upper end of the furnace body 41;

the heat exchange box 5 comprises a box body 51, a water tank 52 is arranged in the box body 51, two ends of the water tank 52 are respectively communicated with a water inlet pipe 57 and a water outlet pipe 56, a plurality of heat exchange pipes 53 are arranged in the water tank 52, two ends of each heat exchange pipe 53 are respectively communicated with the upper end surface and the lower end surface of the water tank 52, gaps are respectively arranged between the upper end surface and the lower end surface of the water tank 52 and the inner wall surface of the box body 51, a plurality of partition plates 54 are respectively arranged in each gap, each partition plate 54 divides the gap into a plurality of cavities 55, each cavity 55 and each heat exchange pipe 53 form a labyrinth type air passing channel in the box body 51, one end of the air passing channel is communicated with the exhaust pipe 44, the other end of the air passing channel is communicated with the.

The working principle and the working process of the invention are as follows:

the first step is as follows: firstly, pouring rice hulls into the pulverizer 1, pulverizing the rice hulls by using the pulverizer 1, then starting the first screw conveyor 21, conveying pulverized rice hull powder into the first storage bin 31 of the powder shooting device 3 by using the first screw conveyor 21, and introducing cooling water into the water tank 52.

The second step is that: open first fan 34, first tripper 35 and combustor 45, the air that first fan 34 blew out blows the rice husk and sends to furnace body 41 in, because the powder pipe is along 41 tangential direction of furnace body and furnace body 41 intercommunication, consequently the rice husk powder that enters into in the furnace body 41 is rotatory at furnace body 41 round combustor 45 spun flame along 41 outer walls of furnace body, and the rice husk powder is evenly lighted by flame, and the rice husk powder of being agglomerated is broken up simultaneously, causes the area of contact of rice husk powder and oxygen and flame to improve, makes the rice husk burning more thorough.

The third step: the ash and hot gas formed by combustion pass through the labyrinth air passage along the exhaust pipe 44 and are exhausted by the exhaust pipe 58, and when the hot gas passes through the heat exchange pipe 53, the heat of the hot gas is exchanged by the cooling water introduced into the water tank 52, so that the cooling water forms hot water or hot steam for recycling.

Still include rice husk drying device 6, rice husk drying device 6 includes drying cabinet 61, dust remover 62, second screw conveyer 22 and third screw conveyer 23, drying cabinet 61 lower extreme passes through discharge tube intercommunication second screw conveyer 22 feed end, 1 feed inlet of second screw conveyer 22 discharge end intercommunication rubbing crusher, it has annular steam pipe 63 to be equipped with outside drying cabinet 61, annular steam pipe 63 communicates with drying cabinet 61 through many hot gas branch pipes 64, pipe 58 intercommunication hot gas branch pipe 64 of discharging fume, third screw conveyer 23 discharge end intercommunication drying cabinet 61, dust remover 62 passes through pipeline intercommunication drying cabinet 61.

During the use, can utilize third screw conveyer 23 to pour the rice husk into drying cabinet 61, and then utilize annular hot-gas pipe 63 and hot gas branch pipe 64, fill the hot-gas that smoke exhaust pipe 58 discharged into the rice husk, utilize hot gas to carry out the drying and preheating to the rice husk, remove unnecessary moisture in the rice husk, avoid the rice husk powder agglomeration after the smashing, further improve burning and crushing effect.

A furnace bridge 71 is arranged at the lower part of the furnace body 41, and the cavity 55 of the furnace body 41 below the furnace bridge 71 is communicated with the second fan 7 through a pipeline. During the use, can open second fan 7 and blow to grate 71 to will drop the rice husk powder on grate 71 and blow up and participate in the burning, make the rice husk burning more thorough.

Claims

1. A rice husk burning device is characterized in that: comprises a pulverizer (1), a first screw conveyor (21), a powder injector (3), a combustion furnace (4) and a heat exchange box (5) which are communicated in sequence;

the powder shooting device (3) comprises a first storage bin (31), a powder inlet pipe (32), an air inlet pipe (33) and a first fan (34), wherein the first fan (34) is communicated with one end of the powder inlet pipe (32) through the air inlet pipe (33), the first storage bin (31) is communicated with the middle part of the air inlet pipe (33) through a discharging pipe, and a first discharger (35) is arranged on the discharging pipe;

the combustion furnace (4) comprises a furnace body (41), a burner (45) is arranged at the bottom of the furnace body (41), a cover (42) is arranged outside the furnace body (41), a heat insulation layer (43) is arranged between the cover (42) and the furnace body (41), one end of the powder inlet pipe (32) far away from the first fan (34) is communicated with the furnace body (41) along the tangential direction of the furnace body (41), and the upper end of the furnace body (41) is communicated with an exhaust pipe (44);

the heat exchange box (5) comprises a box body (51), a water tank (52) is arranged in the box body (51), two ends of the water tank (52) are respectively communicated with a water inlet pipe (57) and a water outlet pipe (56), a plurality of heat exchange pipes (53) are arranged in the water tank (52), two ends of each heat exchange pipe (53) are respectively communicated with the upper end surface and the lower end surface of the water tank (52), gaps are respectively arranged between the upper end surface and the lower end surface of the water tank (52) and the inner wall surface of the box body (51), a plurality of partition plates (54) are arranged in each gap, each gap is divided into a plurality of cavities (55) by each partition plate (54), each cavity (55) and each heat exchange pipe (53) form a labyrinth type air passing channel in the box body (51), one end of each air passing channel is communicated with an;

the rice husk drying device comprises a drying box (61), a dust remover (62), a second screw conveyor (22) and a third screw conveyor (23), wherein the lower end of the drying box (61) is communicated with the feed end of the second screw conveyor (22) through a discharge pipe, the discharge end of the second screw conveyor (22) is communicated with the feed inlet of a pulverizer (1), an annular hot air pipe (63) is arranged outside the drying box (61), the annular hot air pipe (63) is communicated with the drying box (61) through a plurality of hot air branch pipes (64), a smoke exhaust pipe (58) is communicated with the hot air branch pipes (64), the discharge end of the third screw conveyor (23) is communicated with the drying box (61), and the dust remover (62) is communicated with the drying box (61) through a pipeline;

a furnace bridge (71) is arranged at the lower part of the furnace body (41), and a cavity (55) of the furnace body (41) below the furnace bridge (71) is communicated with the second fan (7) through a pipeline.