CN217843915U

CN217843915U - Pulverized coal adding device of thermal power generation equipment

Info

Publication number: CN217843915U
Application number: CN202221144205.3U
Authority: CN
Inventors: 刘军; 梁德勇; 李立人; 成伟东; 史大明; 曲堂明
Original assignee: Yingkou Power Plant of Huaneng Power International Inc
Current assignee: Yingkou Power Plant of Huaneng Power International Inc
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-11-18
Anticipated expiration: 2032-05-13

Abstract

The utility model discloses a device is added to buggy of thermal power equipment relates to the thermal power equipment field, including the blending tank, the outside of blending tank is provided with and divides the gas ring, the inner wall that divides the gas ring is provided with a plurality of nozzle, the nozzle is the tilt up setting, the bottom of blending tank is provided with the connecting pipe, the one end of connecting pipe is connected with the preheating pipe, the one end of preheating pipe is provided with the jar of keeping in. The utility model discloses an air compressor machine is to dividing gas ring internal gas transmission, and the air current gets into the blending tank with the mode of pulse by the nozzle in, the inner wall spiral shell screwing in of compressed air along the blending tank rises, and the buggy receives the impact of uplift, along with compressed gas spiral shell screwing in together expands, and the material subsides downwards after compressed air expands to a certain degree, and compressed gas makes the buggy take place to overturn and rolls, and the mixed effect is better, does not have the wearing and tearing of stirring unit and blade, life that can effectual improvement device.

Description

Pulverized coal adding device of thermal power generation equipment

Technical Field

The utility model relates to a thermal power equipment field specifically is a device is added to thermal power equipment's buggy.

Background

Thermal power generation is a power generation mode that heat energy generated by combustible materials during combustion is converted into electric energy through a power generation device, namely simply, fuel is used for heating water to form high-temperature high-pressure superheated steam, then the steam enters a steam turbine along a pipeline to continuously expand to do work to impact a steam turbine rotor to rotate at a high speed, so that a generator rotor is driven to rotate, and a stator coil cuts magnetic lines of force to generate electric energy.

Chinese patent with publication number CN113685836A discloses a pulverized coal adding device for thermal power generation equipment, which comprises a mixing chamber, an adding unit, an air compressor, a furnace body and an exhaust unit, wherein the mixing chamber is provided with an accommodating space, and comprises an upright post coaxially arranged with the mixing chamber, and the upright post is arranged in the accommodating space. The additive in the device can rotate along with the rotating seat and the air outlet pipe before entering the mixing chamber, so that the effect of quickly and uniformly mixing different additives is achieved, the additive and coal powder can be uniformly mixed when entering the furnace body, and the utilization rate of the additive is improved.

In the above-mentioned technique disclosed, the pulverized coal needs to mix the additive before the burning and guarantees combustion efficiency, and mixing mechanism comprises structures such as hang plate, stirring fan, can reach the effect that the stirring was mixed, but this kind of mechanical rotating part uses for a long time and need carry out maintenance many times, and structures such as axis of rotation need add lubricating oil promptly, and it is comparatively troublesome to maintain cleanness, and it is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a thermal power equipment's buggy adds device to solve general buggy and add the inconvenient technical problem of device inner mechanism maintenance.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a coal powder of thermal power equipment adds device, includes the blending tank, the outside of blending tank is provided with the branch gas ring, the inner wall that divides the gas ring is provided with a plurality of nozzle, the nozzle is the tilt up setting, the bottom of blending tank is provided with the connecting pipe, the one end of connecting pipe is connected with the preheating pipe, the one end of preheating pipe is provided with the jar of keeping in.

Through adopting above-mentioned technical scheme, compressed gas makes the buggy take place to overturn and rolls, and the mixing effect is better, does not have the wearing and tearing of stirring unit and blade, can effectual improvement device's life.

The utility model discloses further set up to, the bottom of blending tank is provided with the discharge gate, the internally mounted of discharge gate has the valve.

Through adopting above-mentioned technical scheme, open the valve, the buggy gets into in the connecting pipe by the discharge gate.

The utility model discloses further set up to, the one end that the connecting pipe inner wall is close to the preheating tube is provided with throws the flitch, and throws the flitch and be the downward sloping setting.

By adopting the technical scheme, the throwing plate can enable the pulverized coal to be impacted to be bent, and then the pulverized coal is dispersed and heat exchanged by high-speed airflow in the preheating pipe.

The utility model discloses further set up to, the blending tank is provided with filtering mechanism with the top of keeping in the jar.

Through adopting above-mentioned technical scheme, gaseous entering blending tank and the jar of keeping in after, can discharge through filtering mechanism filtration rear.

The utility model discloses further set up to, the internal diameter of connecting pipe is less than the internal diameter of preheater tube.

By adopting the technical scheme, the flow velocity of the air flow entering the preheating pipe can be increased, the flow velocity is-m/s, and the pulverized coal can be blown well.

The utility model discloses further set up as, the internal diameter of preheating tube inlet end to giving vent to anger between the end is by big change to little.

By adopting the technical scheme, the flow velocity of the air flow entering the preheating pipe can be increased, and the pulverized coal blowing effect is better.

The utility model discloses further set up to, the heat transfer chamber has been seted up to the pipe wall of preheater tube, the heat preservation chamber has been seted up to the jar wall of the jar of keeping in, and the heat transfer chamber is linked together with the heat preservation chamber.

Through adopting above-mentioned technical scheme, can further promote the preheating effect of preheating tube with the jar of keeping in, guarantee that the buggy is in the preheating state, the effect of combustion is better.

The utility model discloses further set up to, the one end of preheating tube is connected with boiler high temperature flue gas pipeline.

By adopting the technical scheme, high-temperature flue gas can enter the preheating pipe to preheat pulverized coal.

To sum up, the utility model discloses mainly have following beneficial effect:

1. the utility model discloses an air compressor machine is to gas transmission in the branch gas ring, and the air current gets into the blending tank by the nozzle in the pulsed mode, and compressed air current is along the inner wall spiral shell screwing in of blending tank, and the buggy receives the impact of lift, along with compressed gas spiral shell screwing in together expands, and the material subsides downwards after compressed air expands to certain degree, and compressed gas makes the buggy take place to overturn and roll, and the mixing effect is better, does not have the wearing and tearing of stirring unit and blade, can effectual improvement device's life;

2. the utility model discloses mixing the back that finishes at buggy and additive, the mixture preheats in getting into the preheater tube by the connecting pipe, and the preheater tube is connected with boiler flue gas pipeline, and the high temperature flue gas gets into the preheater tube, and under the impact of the fast-speed updraft of high temperature, the mixture turns over to go up along with the air current motion, and the mixture carries out abundant heat transfer with the flue gas in the motion process, accomplishes the work of preheating of buggy mixture.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a sectional view showing the structural connection between the connection tube and the preheating tube according to the present invention;

FIG. 3 is a cross-sectional view of the mixing tank of the present invention;

fig. 4 is a top view of the gas distribution ring of the present invention;

FIG. 5 is the movement diagram of the internal airflow of the present invention

Fig. 6 is a sectional view of the internal structure of the material separating cylinder of the present invention.

In the figure: 1. a mixing tank; 2. a sealing cover; 3. a feeding pipe; 4. a gas distribution ring; 5. an air inlet pipe; 6. a nozzle; 7. a discharge port; 8. a valve; 9. a connecting pipe; 10. a preheating pipe; 11. a temporary storage tank; 12. a material throwing plate; 13. a filtering mechanism; 14. a motor; 15. a material separating barrel; 16. a rotating shaft; 17. a partition plate; 18. a through groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes an embodiment of the present invention according to its overall structure.

A coal powder adding device of thermal power generation equipment is disclosed, as shown in figures 1-5, and comprises a mixing tank 1, wherein a sealing cover 2 is arranged at the top of the mixing tank 1, a plurality of feeding pipes 3 are arranged at the top of the sealing cover 2, coal powder and an additive enter the mixing tank 1 through the feeding pipes 3 to be mixed, a gas distribution ring 4 is arranged at the outer side of the mixing tank 1, a gas inlet pipe 5 is arranged at one side of the outer wall of the gas distribution ring 4, a plurality of nozzles 6 are arranged on the inner wall of the gas distribution ring 4, the nozzles 6 are arranged in an upward inclined manner, compressed gas sprayed out by an air compressor enters the gas distribution ring 4 through the gas inlet pipe 5, the nozzles 6 penetrate into the mixing tank 1, the compressed gas is sprayed into the mixing tank 1 in a pulse manner, the nozzles 6 are arranged in an upward circular array in an inclined manner of twenty degrees along the circumferential direction, the compressed gas sprayed out by the nozzles 6 spirally rises along the tank wall of the mixing tank 1, the coal powder is impacted by an upward lifting force, the compressed gas spirally rises and expands together with the compressed gas, the compressed air after the compressed air expands to a certain degree, the coal powder turns and subsides, the compressed gas, the coal powder is better mixing effect is better, no stirring unit and no abrasion of the stirring unit, and no effective stirring blade, and the service life of the device is prolonged;

the bottom of blending tank 1 is provided with connecting pipe 9, the one end of connecting pipe 9 is connected with preheating pipe 10, the one end of preheating pipe 10 is provided with the jar 11 of keeping in, the buggy finishes with the additive mixture after, the mixture preheats in getting into preheating pipe 10 by connecting pipe 9, preheating pipe 10 is connected with boiler flue gas pipeline, the high temperature flue gas gets into preheating pipe 10, under the impact of the fast-speed updraft of high temperature, the mixture turns over to upward along with the air current motion, the mixture carries out abundant heat transfer with the flue gas in the motion process, accomplish the preheating work of buggy mixture, buggy after preheating gets into and keeps in jar 11 and stores.

Further, please refer to fig. 5-6, a material separating cylinder 15 is arranged at the bottom of the temporary storage tank 11, through grooves 18 are formed in the top and the bottom of the material separating cylinder 15, a motor 14 is installed at one side of the material separating cylinder 15, the output end of the motor 14 is connected with a rotating shaft 16 through a coupler, a plurality of partition plates 17 are arranged on the outer wall of the rotating shaft 16, the rotating shaft 16 and the partition plates 17 rotate along with the rotation of the motor 14, so that pulverized coal falling from the through grooves 18 can be better separated, and the pulverized coal can conveniently enter a subsequent combustion mechanism.

Referring to fig. 1, a discharge port 7 is disposed at the bottom of the mixing tank 1, a valve 8 is disposed inside the discharge port 7, and after the coal powder in the mixing tank 1 is completely mixed, the valve 8 is opened, so that the coal powder can smoothly enter the connecting pipe 9.

Referring to fig. 2, a throwing plate 12 is disposed at an end of the inner wall of the connecting pipe 9 close to the preheating pipe 10, the throwing plate 12 is inclined downward, and the pulverized coal in the connecting pipe 9 impacts the throwing plate 12 before entering the preheating pipe 10, is dispersed and deflected, and is dispersed by the high-speed airflow in the preheating pipe 10 for heat exchange.

Referring to fig. 1, a filtering mechanism 13 is disposed on the top of the mixing tank 1 and the temporary storage tank 11, and after entering the mixing tank 1 and the temporary storage tank 11, the gas is filtered by the filtering mechanism 13 and then discharged, and the filtering mechanism 13 may be composed of filtering nets at different levels.

Referring to fig. 2, the inner diameter of the connection pipe 9 is smaller than the inner diameter of the preheating pipe 10, and the pulverized coal is blown away by the airflow from the connection pipe 9 into the preheating pipe 10 to perform heat exchange.

Referring to fig. 2, the inner diameter of the preheating pipe 10 from the inlet end to the outlet end changes from large to small, so that the flow velocity of the air entering the preheating pipe 10 is increased to 16-22m/s, and the pulverized coal can be blown up better.

Referring to fig. 2, a heat transfer cavity is formed on the wall of the preheating pipe 10, a heat preservation cavity is formed on the wall of the temporary storage tank 11, the heat transfer cavity is communicated with the heat preservation cavity, high-temperature flue gas enters the preheating pipe 10 and also enters the heat transfer cavity, and the heat transfer cavity is connected with the heat preservation cavity of the temporary storage tank 11, so that the preheating effect of the preheating pipe 10 and the temporary storage tank 11 can be further improved, pulverized coal is ensured to be in a preheating state, and the combustion effect is better.

The utility model discloses a theory of operation does: coal powder and additives enter a mixing tank 1 through a feeding pipe 3 to be mixed, compressed gas sprayed by an air compressor enters a gas distribution ring 4 through an air inlet pipe 5, a nozzle 6 penetrates into the mixing tank 1, the compressed gas is sprayed into the mixing tank 1 in a pulse mode, the nozzle 6 inclines twenty degrees along the circumferential direction and is arranged in an upward circular array mode, the compressed gas sprayed by the nozzle 6 can spirally ascend along the tank wall of the mixing tank 1 in the arrangement mode, the coal powder is impacted by ascending force and spirally ascends and expands along with the compressed gas, materials are downwards settled after the compressed air expands to a certain degree, and the compressed gas enables the coal powder to overturn and roll to be fully mixed;

after the coal powder and the additive are mixed, the mixture enters a preheating pipe 10 through a connecting pipe 9 to be preheated, the preheating pipe 10 is connected with a boiler flue gas pipeline, high-temperature flue gas enters the preheating pipe 10, the mixture turns upwards to move along with the air flow under the impact of high-temperature and high-speed ascending air flow, the mixture and the flue gas perform sufficient heat exchange in the moving process, and the preheating work of the coal powder mixture is completed.

While embodiments of the invention have been illustrated and described, it is not intended to limit the invention to the exact construction and operation illustrated and described, and that various other features, structures, materials, or characteristics may be substituted for those illustrated and described without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a coal powder of thermal power equipment adds device, includes blending tank (1), its characterized in that: the outside of blending tank (1) is provided with and divides gas ring (4), the inner wall that divides gas ring (4) is provided with a plurality of nozzle (6), nozzle (6) are the tilt up setting, the bottom of blending tank (1) is provided with connecting pipe (9), the one end of connecting pipe (9) is connected with preheating pipe (10), the one end of preheating pipe (10) is provided with temporary storage tank (11).

2. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: the bottom of blending tank (1) is provided with discharge gate (7), the internally mounted of discharge gate (7) has valve (8).

3. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: and a material throwing plate (12) is arranged at one end of the inner wall of the connecting pipe (9) close to the preheating pipe (10), and the material throwing plate (12) is arranged in a downward inclined mode.

4. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: and the top parts of the mixing tank (1) and the temporary storage tank (11) are provided with a filtering mechanism (13).

5. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: the inner diameter of the connecting pipe (9) is smaller than that of the preheating pipe (10).

6. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: the inner diameter of the preheating pipe (10) between the gas inlet end and the gas outlet end changes from large to small.

7. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: the pipe wall of the preheating pipe (10) is provided with a heat transfer cavity, the tank wall of the temporary storage tank (11) is provided with a heat preservation cavity, and the heat transfer cavity is communicated with the heat preservation cavity.

8. The pulverized coal adding device of a thermal power plant according to claim 1, characterized in that: one end of the preheating pipe (10) is connected with a high-temperature flue gas pipeline of the boiler.