CN110345505B

CN110345505B - Ultralow emission boiler system

Info

Publication number: CN110345505B
Application number: CN201910555872.7A
Authority: CN
Inventors: 周志杰; 郭建文
Original assignee: Changzhou Warren Thermal Power Co ltd
Current assignee: Changzhou Warren Thermal Power Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2021-01-05
Anticipated expiration: 2039-06-25
Also published as: CN110345505A

Abstract

The invention relates to an ultra-low emission boiler system, which comprises a boiler body, an air inlet pipe, an exhaust pipe and a stirring device arranged in the boiler body, wherein the stirring device comprises a rotating shaft arranged along the vertical direction and stirring rods arranged on the rotating shaft at intervals in the circumferential direction, the lower end of the stirring shaft extends out of the boiler body, and a stirring motor is arranged at the lower end of the stirring shaft; through opening the furnace gate, put into the furnace body with simple broken fritter coal, when coal began to burn, start agitator motor, the pivot drives the puddler and rotates, and the puddler reduces coal burning caking for the air can with pile and bury darker coal contact, and then reduces the discharge that C element incompletely burnt formation CO, and then avoids artificial contact furnace body, and realizes promoting the utilization ratio of coal simultaneously.

Description

Ultralow emission boiler system

Technical Field

The invention relates to the technical field of combustion power generation equipment, in particular to an ultra-low emission boiler system.

Background

The boiler is equipment frequently used in the industrial field or daily life, and the boiler is divided into a plurality of types according to the difference of fuel, and is a solar boiler using solar energy and an electric boiler using electric energy, but the most existing boiler is a coal-fired boiler which uses coal to heat the boiler as the name suggests.

The coal-fired boiler mostly comprises a boiler body and a boiler door, an air inlet pipe and an air outlet pipe are arranged on the boiler body, coal is put into the boiler body by opening and closing the boiler door, air is continuously introduced into the boiler body through the air inlet pipe during the combustion of the coal, so that enough oxygen and the coal are mixed and combusted, and finally flue gas is discharged from the air outlet pipe;

however, because coal is accumulated at the bottom in the furnace body, insufficient combustion of the coal often occurs in the combustion process of the coal, so that the combustion value of the coal is reduced and resources are wasted.

Disclosure of Invention

The invention aims to provide an ultra-low emission boiler system, and the reaction force generated by high-pressure air injection pushes a stirring assembly to rotate, so that coal and air are fully mixed, the utilization rate of the coal is improved, and meanwhile, operators are protected.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides an ultralow emission boiler system, includes furnace body, intake pipe and blast pipe, still including setting up the agitating unit in the furnace body, agitating unit includes that axis of rotation and circumference interval that set up along vertical direction are provided with the epaxial puddler of rotation, the lower extreme of (mixing) shaft extends to outside the furnace body, just the lower extreme of (mixing) shaft is provided with agitator motor.

Through adopting above-mentioned technical scheme, open the furnace gate, put into simple broken fritter coal into the furnace body, when coal began to burn, start agitator motor, the pivot drives the puddler and rotates, and the puddler reduces coal burning caking for the air can with pile and bury darker coal contact, and then reduce the discharge that C element did not burn completely and form CO, and then avoid artificial contact furnace body, and realize promoting the utilization ratio of coal simultaneously.

The invention is further configured to: the axis of rotation sets up with the equal cavity of puddler, the inside and inside intercommunication of puddler of axis of rotation, the puddler all sets up along the radial extension of axis of rotation, on the puddler and along its length direction spaced apart venthole that is equipped with, the venthole is seted up towards the horizontal direction, the axis of rotation is located the coaxial cover of the outer one end of furnace body and is equipped with the go-between, the cavity sets up in the go-between, set up in the pivot with the inlet port of the intercommunication in the go-between, the intake pipe sets up with the fixed intercommunication of go-between.

Through adopting above-mentioned technical scheme, when coal burning, to carrying high-pressure air through the intake pipe, high-pressure air gets into the go-between, again from the inlet port get into the pivot, discharge from the venthole on the puddler until high-pressure gas, when the coal in the furnace body is not caking completely, agitator motor can be closed, through the reaction force that high-pressure gas sprays the production, the rotation of direct drive stirring subassembly, while scattering coal, make the air fully mix with coal, and then promote coal combustion efficiency, reduce CO's emission simultaneously.

The invention is further configured to: the both ends of puddler just extend to the direction of keeping away from the venthole and have the otic placode, it is provided with the axostylus axostyle to rotate between the otic placode, the axis of rotation of axostylus axostyle is on a parallel with the puddler, just be provided with the stirring leaf around its axis circumference interval on the axostylus axostyle.

Through adopting above-mentioned technical scheme, when the pivot drove the puddler and rotates, the stirring leaf received the resistance inequality of coal for the rotation of axostylus axostyle and stirring leaf, and then realize that coal is in vertical reverse removal and mixing, makes the coal of lower floor turn to the upper strata, promotes the homogeneity of coal and air mixing, realizes the purpose of coal intensive combustion.

The invention is further configured to: and the end of the stirring blade, which is far away from the shaft lever, is provided with the shifting levers, and the shifting levers are arranged at intervals along the length direction of the shaft lever.

Through adopting above-mentioned technical scheme, when there is the situation of caking in coal, rotate along with the stirring leaf at the driving lever, the sharp-pointed end of driving lever pierces the coal of caking for the coal of caking is broken, further promotes the area of contact between coal and the realization coal fully burns's purpose, reduces harmful gas's emission.

The invention is further configured to: the periphery of puddler just has seted up the mounting groove with the venthole is coaxial, inlay in the mounting groove and be equipped with the screen cloth, just threaded connection has the fender ring of fixed screen cloth in the mounting groove.

Through adopting above-mentioned technical scheme, inlay the screen cloth and locate the mounting groove, will keep off ring threaded connection again in the mounting groove, keep off in the ring extrusion screen cloth fixed mounting groove, when filling coal, the screen cloth blocks the great coal of monoblock and imbeds the venthole, has guaranteed that the air passes through the venthole and has got into the furnace body.

The invention is further configured to: one end of the stirring rod, which is far away from the rotating shaft, is provided with a thread groove communicated with the inside of the stirring rod, and a thread cover is connected with the thread groove through threads.

Through adopting above-mentioned technical scheme, because there is the hole on the screen cloth, nevertheless can't block tiny ashes and pass through the screen cloth, can exist and continuously have the ashes to pass through in the screen cloth gets into the puddler, highly-compressed air blows the ashes to the inside one end of keeping away from the pivot of puddler and takes place to pile up, constantly accumulational ashes can be in the inside venthole that blocks up of puddler, through opening the screw cap, and to letting in highly-compressed air in the stirring subassembly, highly-compressed air blows off the puddler with accumulational ashes from the thread groove, realize the inside cleanness to the puddler, guarantee to furnace body delivered air's stability.

The invention is further configured to: the lower end of the furnace body is provided with an annular groove, the annular groove is coaxial with the rotating shaft, and a bearing matched with the rotating shaft is embedded in the annular groove.

By adopting the technical scheme, the bearing is embedded in the annular groove, so that the aim of stably rotating the rotating shaft on the furnace body is fulfilled.

The invention is further configured to: the upper end of the connecting ring coaxially extends to form a fixed pipe, the fixed pipe is communicated with the connecting ring, and the upper end of the fixed pipe is fixedly connected to the lower end of the furnace body.

By adopting the technical scheme, when coal is combusted, the high-pressure air in the connecting ring flows to the lower end of the furnace body through the connecting ring, and enters the furnace body from the gap between the rotating shaft and the furnace body and the gap of the bearing, so that slag is prevented from entering the gap between the rotating shaft and the furnace body, the rotating stability of the rotating shaft is ensured, and the environmental pollution caused by leakage of the slag from the lower end of the furnace body is avoided.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the stirring motor drives the stirring assembly to rotate, so that coal is crushed, the mixing success rate of the coal and air is improved, and the coal is fully combusted;

2. high-pressure air sprays and produces the reaction through stirring in the subassembly for stirring the subassembly and rotating, reduce the energy consumption that stirring motor drive stirring subassembly needs, and further promote the mixed degree of air and coal.

Drawings

FIG. 1 is a schematic diagram of an assembled structure of an ultra-low emission boiler system;

FIG. 2 is a schematic view for embodying the lower end structure of the furnace body;

FIG. 3 is an exploded view illustrating a structure for connecting the stirring assembly and the air inlet pipe;

fig. 4 is an exploded view for embodying the construction of the stirring rod.

In the figure, 1, a furnace body; 11. an annular groove; 12. a bearing; 2. a furnace door; 3. an exhaust pipe; 4. an air inlet pipe; 5. a stirring assembly; 6. a rotating shaft; 61. an air inlet; 7. a stirring rod; 71. an air outlet; 72. mounting grooves; 73. screening a screen; 74. a baffle ring; 75. a thread groove; 76. a threaded cap; 8. a stirring motor; 9. a connecting ring; 91. a fixed tube; 10. an ear plate; 13. a shaft lever; 14. stirring blades; 15. a deflector rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 3, an ultra-low emission boiler system comprises a furnace body 1 and a furnace door 2, wherein an exhaust pipe 3 is arranged at the top end of the furnace body 1, a stirring assembly 5 is arranged at the bottom of the furnace body 1, the stirring assembly 5 comprises a rotating shaft 6 and stirring rods 7, the rotating shaft 6 is arranged along the vertical direction and rotates around the axis of the rotating shaft, a plurality of stirring rods 7 are circumferentially fixed on the rotating shaft 6 at intervals, the lower end of the rotating shaft 6 extends to the outer side of the furnace body 1, and a stirring motor 8 is arranged at the lower end of the rotating shaft 6; open furnace gate 2, put into furnace body 1 with simple broken fritter coal, when coal began to burn, start agitator motor 8, pivot 6 drives puddler 7 and rotates, and puddler 7 reduces the coal burning caking for the air can with pile and bury darker coal contact, and then reduce the discharge that C element did not burn completely and form CO, realize promoting the utilization ratio of coal.

As shown in fig. 2 and 3, the rotating shaft 6 and the stirring rod 7 are both hollow, the inside of the rotating shaft 6 is communicated with the inside of the stirring rod 7, air outlet holes 71 are arranged on one side of the stirring rod 7 in the horizontal direction and spaced along the length direction of the stirring rod, air inlet holes 61 are arranged at intervals in the circumferential direction of the lower end of the rotating shaft 6, a connecting ring 9 is sleeved on the rotating shaft 6, the connecting ring 9 is hollow, the inner side of the connecting ring 9 is communicated with the air inlet holes 61, and an air inlet pipe 4 is fixedly connected to the connecting ring 9;

when coal burns, through intake pipe 4 to carrying high-pressure air, high-pressure air gets into go-between 9, in getting into pivot 6 again from inlet port 61, until high-pressure gas discharges from venthole 71 on puddler 7, when the coal in furnace body 1 is not caking completely, agitator motor 8 can be closed, through the reaction force that high-pressure gas sprays the production, the rotation of direct drive stirring subassembly 5, while scattering coal, make the air fully mix with coal, and then promote coal combustion efficiency, reduce the emission of CO simultaneously.

As shown in fig. 3 and 4, an annular groove 11 is formed at the lower end of the furnace body 1, the annular groove 11 is coaxially arranged with the rotating shaft 6, a bearing 12 is embedded in the annular groove 11, the purpose of stable rotation of the rotating shaft 6 on the furnace body 1 is achieved, meanwhile, a fixed pipe 91 extends from the upper end of the connecting ring 9, the upper end of the fixed pipe 91 extends to the lower end of the furnace body 1, so that the fixed pipe 91 is coaxially sleeved outside the rotating shaft 6, and the diameter of the annular groove 11 is smaller than that of the fixed pipe 91; when coal is combusted, the high-pressure air in the connecting ring 9 flows to the lower end of the furnace body 1 through the connecting ring 9 and enters the furnace body 1 from the gap between the rotating shaft 6 and the furnace body 1 and the gap between the bearings 12, so that slag is prevented from entering the gap between the rotating shaft 6 and the furnace body 1, the rotating stability of the rotating shaft 6 is ensured, and the environmental pollution caused by leakage of the slag from the lower end of the furnace body 1 is avoided.

As shown in fig. 3 and 4, a pair of parallel ear plates 10 are provided at both ends of the stirring rod 7, the ear plates 10 extend in a direction away from the air outlet 71, a shaft 13 is provided between the ear plates 10, the shaft 13 is parallel to the stirring rod 7, both ends of the shaft 13 are rotatably provided on the ear plates 10 around the axis thereof, and stirring blades 14 are provided on the shaft 13 at intervals in the circumferential direction; when the rotating shaft 6 drives the stirring rod 7 to rotate, the stirring blades 14 are different in resistance of coal, so that the shaft rod 13 and the stirring blades 14 rotate, the coal is vertically and reversely moved and mixed, the coal on the lower layer is turned to the upper layer, the uniformity of mixing of the coal and air is improved, and the purpose of fully burning the coal is achieved.

And a plurality of driving levers 15 are arranged at the end of the stirring blade 14 far away from the shaft rod 13 at intervals, the driving levers 15 are in a long and thin rod shape, the driving levers 15 are arranged in a bending mode, the end of the driving levers 15 far away from the stirring blade 14 is arranged in a pointed angle shape, when coal is caked, the driving levers 15 rotate along with the stirring blade 14, the pointed ends of the driving levers 15 penetrate into the caked coal, the caked coal is broken, the contact area between the coal and the shaft rod is further improved, the purpose of full combustion of the coal is achieved, and the emission of harmful gas is reduced.

As shown in fig. 3 and 4, a mounting groove 72 is provided on the outer side of the stirring rod 7 and coaxially with the air outlet 71, a screen 73 and a baffle ring 74 are provided in the mounting groove 72, the screen 73 is embedded in the mounting groove 72, the baffle ring 74 is screwed into the mounting groove 72, the baffle ring 74 extrudes the screen 73 to fix the mounting groove 72, and when coal is charged, the screen 73 blocks the large coal block from being embedded into the air outlet 71, thereby ensuring that air enters the furnace body 1 through the air outlet 71.

And be provided with thread groove 75 in the one end of puddler 7 that is kept away from axostylus axostyle 13, thread groove 75 communicates with the inside of puddler 7, and threaded connection has screw cap 76 in thread groove 75, because there is the hole on the screen cloth 73, but can't block that tiny ashes pass through screen cloth 73, can exist and continuously have the ashes to pass through screen cloth 73 and get into puddler 7, high-pressure air blows the ashes to the inside one end of keeping away from pivot 6 of puddler 7 and takes place to pile up, the ash that constantly piles up can block up venthole 71 in the inside of puddler 7, through opening screw cap 76, and let in high-pressure air in stirring subassembly 5, high-pressure air blows off the accumulational ashes from thread groove 75 puddler 7, realize the inside cleanness of puddler 7, guarantee the stability of air feed to furnace body 1.

The implementation principle of the embodiment is as follows:

when coal is combusted, high-pressure air is introduced into the air inlet pipe 4, enters the stirring assembly 5 through the connecting ring 9 and is discharged from the air outlet hole 71 on the stirring assembly 5, reaction force is generated when the high-pressure air is discharged, the stirring assembly 5 rotates, the stirring rod 7 and the stirring blade 14 in the stirring assembly 5 enable the coal to be fully mixed with the air, the reaction sufficiency of the coal and oxygen is improved, the discharge of harmful gas is reduced, and the purpose of improving the utilization rate of the coal is achieved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides an ultralow emission boiler system, includes furnace body (1), intake pipe (4) and blast pipe (3), its characterized in that: the furnace body is characterized by further comprising a stirring device arranged in the furnace body (1), wherein the stirring device comprises a rotating shaft (6) arranged in the vertical direction and stirring rods (7) arranged on the rotating shaft (6) at intervals in the circumferential direction, the lower end of the rotating shaft (6) extends out of the furnace body (1), and a stirring motor (8) is arranged at the lower end of the rotating shaft (6);

the rotating shaft (6) and the stirring rod (7) are both arranged in a hollow mode, the interior of the rotating shaft (6) is communicated with the interior of the stirring rod (7), the stirring rod (7) is arranged along the radial extension of the rotating shaft (6), air outlet holes (71) are formed in the stirring rod (7) at intervals along the length direction of the stirring rod, the air outlet holes (71) are formed in the horizontal direction, a connecting ring (9) is coaxially sleeved at one end, located outside the furnace body (1), of the rotating shaft (6), the connecting ring (9) is arranged in a hollow mode, an air inlet hole (61) communicated with the interior of the connecting ring (9) is formed in the rotating shaft (6), and the air inlet pipe (4) is fixedly communicated with the connecting ring (9);

ear plates (10) extend from two ends of the stirring rod (7) in the direction far away from the air outlet hole (71), a shaft lever (13) is rotatably arranged between the ear plates (10), the rotating shaft line of the shaft lever (13) is parallel to the stirring rod (7), and stirring blades (14) are arranged on the shaft lever (13) and are circumferentially spaced around the shaft line;

one end of the stirring blade (14) far away from the shaft lever (13) is provided with deflector rods (15), and the deflector rods (15) are arranged at intervals along the length direction of the shaft lever (13);

the deflector rod (15) is in a shape of a long and thin rod, the deflector rod (15) is arranged in a bending mode, and one end, far away from the stirring blade (14), of the deflector rod (15) is arranged in a pointed angle shape;

the periphery of puddler (7) and with venthole (71) coaxial mounting groove (72) of having seted up, inlay in mounting groove (72) and be equipped with screen cloth (73), just threaded connection has fender ring (74) of fixed screen cloth (73) in mounting groove (72).

2. An ultra-low emission boiler system according to claim 1, wherein: one end of the stirring rod (7) far away from the rotating shaft (6) is provided with a thread groove (75) communicated with the inside of the stirring rod, and a thread cover (76) is connected in the thread groove (75) in a threaded manner.

3. An ultra-low emission boiler system according to claim 1, wherein: the lower end of the furnace body (1) is provided with an annular groove (11), the annular groove (11) and the rotating shaft (6) are coaxially arranged, and a bearing (12) matched with the rotating shaft (6) is embedded in the annular groove (11).

4. An ultra-low emission boiler system according to claim 3, wherein: the upper end of the connecting ring (9) coaxially extends to form a fixed pipe (91), the fixed pipe (91) is communicated with the connecting ring (9), and the upper end of the fixed pipe (91) is fixedly connected to the lower end of the furnace body (1).