CN216431792U - Coal breakage pipe high temperature drying prevents stifled system - Google Patents

Abstract

The utility model discloses a high-temperature drying anti-blocking system for a coal dropping pipe, which comprises a coal dropping pipe, a baffle plate and a drying device; the inlet of the coal dropping pipe is connected with the upper-level material conveying device, the outlet of the coal dropping pipe is positioned above the lower-level material conveying device, the drying device is arranged at the outlet of the coal dropping pipe, and the drying device is connected with primary air of the boiler; the curved baffle sets up the entry at the coal pipe to the sunk area of baffle is just to higher level's material conveyer's output, and the baffle adopts the curve design, guarantees that the coal flows and restraint the contact angle of baffle at the optimum scope, guarantees the coal and flows the motion of gathering a bundle, reduces the impact, avoids the production of induced wind, simultaneously, sets up drying device on the coal breakage pipe, makes the coal flow obtain fully dry, has effectively avoided coal conveying system and powder process system's coal blockage phenomenon.

Description

Coal breakage pipe high temperature drying prevents stifled system

Technical Field

The utility model relates to a power generation facility technical field specifically is a coal breakage pipe high temperature drying prevents stifled system.

Background

Referring to fig. 1, the main components of the material transferring system of the transfer point of the traditional coal-fired power plant are as follows: the head blanking hopper, the three-way baffle, the coal dropping pipe, the buffering air locking device, the guide chute and the like, but the coal is too high in humidity, and particularly, the coal blockage phenomenon can occur when the moisture in the coal exceeds 13%, so that the coal blockage phenomenon easily occurs in a traditional coal conveying system in rainy seasons or when high-moisture coal types are conveyed, and meanwhile, the coal dropping pipe of a boiler coal pulverizing system can be blocked, so that the coal mill is broken, and the safety production of a coal-fired power plant is endangered.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a stifled system is prevented in coal breakage pipe high temperature drying reduces the coal pulverizer coal breakage problem that the stifled coal of feeder coal breakage pipe caused.

The utility model discloses a realize through following technical scheme:

a high-temperature drying anti-blocking system for a coal dropping pipe comprises the coal dropping pipe, a baffle and a drying device;

the inlet of the coal dropping pipe is connected with the upper-level material conveying device, the outlet of the coal dropping pipe is positioned above the lower-level material conveying device, the drying device is arranged at the outlet of the coal dropping pipe, and the drying device is connected with primary air of the boiler; the arc-shaped baffle is arranged at the inlet of the coal dropping pipe, the concave area of the baffle is over against the output end of the higher-level material conveying device, and the baffle is used for changing the moving track of the material output by the higher-level material conveying device so that the material falls downwards.

Preferably, the coal dropping pipe comprises a vertical leading-in section and a leading-out section, the lower end of the leading-in section is connected with the upper end of the leading-out section through a flow guide section, the inlet of the leading-in section is positioned on one side of the upper end and is opposite to a higher-level material conveying device, and the baffle is arranged in the inlet of the leading-in section.

Preferably, the center of the conveyor belt of the lower-level material conveying device is opposite to the center of the outlet of the leading-out section.

Preferably, the drying device is arranged on the derivation section of the coal dropping pipe and comprises a drying chamber and an air pipe, the drying chamber is coated on the outer wall of the derivation section, a drying air chamber is formed between the drying chamber and the outer wall of the derivation section, one end of the air pipe is communicated with the drying chamber, the other end of the air pipe is connected with primary air of the boiler, and a plurality of air holes are arranged in an array on the outer wall of the derivation section in the drying air chamber area.

Preferably, the air holes are arranged from outside to inside in an inclined and downward manner.

Preferably, the baffle includes curved spoiler and the drainage plate of being connected rather than the lower extreme, and the upper end of spoiler is located higher level material transfer device export top, and the drainage plate slope sets up.

Preferably, the included angle between the drainage plate and the leading-in section is 10-15 degrees.

Preferably, a vibration hammer is arranged on the coal dropping pipe.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model provides a pair of stifled system is prevented to coal breakage pipe high temperature drying, including coal breakage pipe, baffle and drying device, the coal stream collides the leading-in section that the baffle got into the coal breakage pipe, changes the coal stream orbit through the baffle, makes the coal stream change into according to the predetermined route landing by freely throwing down, guarantees that the coal stream concentrates, reduces the induced wind intensity that arouses by the coal stream motion, avoids the baffle box malleation too high. The baffle controls the conversion process between kinetic energy and gravitational potential energy of the coal flow in the falling process, and the coal dropping pipe avoids seams and folding angles, so that the coal flow slides downwards along an expected optimal route in the coal dropping pipe, and coal blockage is avoided. Meanwhile, the baffle adopts a curve design, so that the contact angle between the coal flow and the constraint baffle is in the optimal range, the coal flow cluster motion is ensured, the impact is reduced, the generation of induced wind is avoided, meanwhile, the drying device is arranged on the coal dropping pipe, the coal flow is fully dried, and the coal blockage phenomenon of a coal conveying system and a coal pulverizing system is effectively avoided.

Drawings

FIG. 1 is a schematic structural diagram of a conventional coal dropping pipe;

fig. 2 is a schematic structural view of the baffle of the air guide sleeve of the present invention;

FIG. 3 is a schematic structural view of the coal dropping pipe of the present invention;

FIG. 4 is a side view of FIG. 3;

fig. 5 is a schematic structural diagram of the drying device of the present invention.

In the figure: 1. a baffle plate; 2. a drum; 3. a conveyor belt; 4. a coal flow trajectory; 5. a drying bin; 6. a coal dropping pipe; 7. an air duct; 8. a valve; 9. and (5) vibrating the hammer.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.

Referring to fig. 2-5, a high-temperature drying anti-blocking system for a coal dropping pipe comprises a coal dropping pipe 6, a baffle plate 1 and a drying device.

The inlet of the coal dropping pipe 6 is connected with the upper-level material conveying device, the outlet of the coal dropping pipe 6 is positioned above the lower-level material conveying device, the drying device is arranged at the outlet of the coal dropping pipe 6, and the drying device is connected with primary air of the boiler; the arc-shaped baffle is arranged at the inlet of the coal dropping pipe 6, the concave area of the baffle is over against the output end of the higher-level material conveying device, and the baffle is used for changing the moving track of the material output by the higher-level material conveying device so as to enable the material to fall downwards.

Higher level material transfer device and subordinate material transfer device's structure is the same, including the gyro wheel 2 that a plurality of intervals set up and around the conveyer belt 3 of dress on a plurality of cylinders, the material is carried on conveyer belt 3, and subordinate material transfer device's conveyer belt's center is just to the center of 6 exports of coal breakage pipe, prevents the belt off tracking that arouses by the unbalance loading and the unrestrained of coal, guarantees that the belt effectively exerts power.

The coal dropping pipe 6 comprises a vertical leading-in section and a leading-out section, the lower end of the leading-in section is connected with the upper end of the leading-out section through a flow guide section, the inlet of the leading-in section is positioned on one side of the upper end and is opposite to a higher-level material conveying device, a baffle is arranged in the inlet of the leading-in section, and two sides of the baffle are fixedly connected with the side wall of the inlet of the leading-in section. The diversion section is obliquely arranged and used for enabling the diversion section to be arranged above the lower-level material conveying device, and the length and the inclination of the diversion section are arranged according to the position of the lower-level material conveying device.

Drying device sets up on the derivation section of coal breakage pipe, including dry storehouse 5, tuber pipe 7 and valve 8, 5 sealed cladding in dry storehouse are on the outer wall of derivation section, form the dry plenum between the outer wall of dry storehouse 5 and derivation section, the one end and the dry storehouse intercommunication of tuber pipe 7, the other end is connected with the wind of boiler, the derivation section is located the outer wall in dry plenum region and is arranged in array and is provided with a plurality of wind holes, the wind hole is from outer to the downthehole slope of inclining downwards, make dry hot-blast intraductal parcel of coal spin drying under the hands of the arms that falls. The primary air of the boiler is introduced into the coal conveying system through the air pipe and supplies air to the drying device, and meanwhile, the air pipe is provided with a valve 8.

The baffle 1 comprises an arc-shaped spoiler and a drainage plate connected with the lower end of the spoiler, the upper end of the spoiler is positioned above the outlet of the superior material conveying device, the drainage plate is obliquely arranged, and the included angle between the drainage plate and the leading-in section is 10-15 degrees. The coal flow collides with the flow blocking plate and then enters the leading-in section of the coal dropping pipe 6 along the flow guiding plate, the track of the coal flow is changed by the baffle plate, the coal flow is changed from free dropping to sliding off according to a preset route, the coal flow is ensured to be concentrated, the induced wind strength caused by the movement of the coal flow is reduced, and the over-high positive pressure of the guide chute is avoided. The conversion process between kinetic energy and gravitational potential energy of the coal flow in the falling process is controlled through structural design, seams and folding angles of the coal falling pipe are avoided, the coal flow slides downwards along an expected optimal route in the coal falling pipe, and coal blockage is avoided. Meanwhile, the baffle adopts a curve design, so that the contact angle between the coal flow and the constraint baffle is ensured to be in an optimal range, the coal flow cluster motion is ensured, the impact is reduced, and the generation of induced wind is avoided.

The outer wall of the splicing position of the leading-in section and the flow guide section of the coal dropping pipe is provided with a vibration hammer 9, the direction-changing position of the coal dropping pipe is shaken and beaten, and the coal powder is prevented from being accumulated at the outlet.

The coal dropping pipe is made of a mirror-surface wear-resistant composite steel plate, the surface of the coal dropping pipe is provided with a 6mm high-hardness wear-resistant layer, the surface hardness is HRC58-62, and a lining plate is not required to be additionally arranged. The design of the coal dropping pipe is combined with the coal parameters to carry out design calculation, and streamline design is adopted, so that the direct impact of the dropping on a receiving belt is avoided, the actual data coupling of the dynamic repose angle of the material is carried out, the final simulation parameters are determined, the operation performance index is met, and the functions of dust removal, blockage prevention, speed reduction and impact reduction are achieved.

The utility model provides a pair of stifled system is prevented in coal breakage pipe high temperature drying, baffle lead to the coal flow make coal flow whereabouts tied in a bundle and speed evenly moderate, effectively eliminate the coal breakage pipe blocking phenomenon that carries high water content material to cause. Secondly, the coal flow velocity direction which is originally vertical to the belt is decomposed into three directions of being vertical to the belt direction, being along the belt direction and being along the radial direction of the belt through the flow guide section which is obliquely arranged, so that the velocity in the vertical direction is reduced, and the impact and the abrasion to the lower-level equipment are reduced. The circular arc transition treatment is carried out on the connection part of the leading-in section and the flow guide section, so that the coal flow which is originally and directly impacted on the coal dropping pipe is changed into the coal flow which is contacted with the inner wall of the coal dropping pipe along the tangential direction and then falls down along the inner wall in a spiral curve form, the impact is reduced, the contact area of the coal flow and the pipe wall is increased, the sudden kinetic energy loss caused by the impact is changed into the slow kinetic energy loss caused by friction, the dust caused by the impact and the wet coal caused by the impact are reduced to be bonded with the pipe wall, and the speed of the coal flow can be controlled within a certain range by changing the circular arc parameters at the corners. And finally, the coal flow spirally falls under the dry hot air wrapped on the inner wall of the coal dropping pipe, so that the coal flow is fully dried, and the coal blockage phenomenon of a coal conveying system and a coal pulverizing system is effectively avoided.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (8)

1. A high-temperature drying anti-blocking system of a coal dropping pipe is characterized by comprising the coal dropping pipe (6), a baffle (1) and a drying device;

the inlet of the coal dropping pipe (6) is connected with the upper-level material conveying device, the outlet of the coal dropping pipe (6) is positioned above the lower-level material conveying device, the drying device is arranged at the outlet of the coal dropping pipe (6), and the drying device is connected with primary air of the boiler; the arc-shaped baffle is arranged at the inlet of the coal dropping pipe (6), the concave area of the baffle is over against the output end of the higher-level material conveying device, and the baffle is used for changing the moving track of the material output by the higher-level material conveying device so as to enable the material to fall downwards.

2. The high-temperature drying and anti-blocking system for the coal drop pipe as claimed in claim 1, wherein the coal drop pipe (6) comprises a vertical leading-in section and a leading-out section, the lower end of the leading-in section is connected with the upper end of the leading-out section through a flow guide section, the inlet of the leading-in section is positioned on one side of the upper end and is opposite to the superior material conveying device, and a baffle is arranged in the inlet of the leading-in section.

3. The high-temperature drying and anti-blocking system for the coal drop pipe as claimed in claim 2, wherein the center of the conveyor belt of the lower-level material conveying device is opposite to the center of the outlet of the leading-out section.

4. The high-temperature drying and anti-blocking system of the coal chute as claimed in claim 2, wherein the drying device is arranged on the leading-out section of the coal chute and comprises a drying chamber (5) and an air pipe (7), the drying chamber (5) is coated on the outer wall of the leading-out section, a drying air chamber is formed between the drying chamber (5) and the outer wall of the leading-out section, one end of the air pipe (7) is communicated with the drying chamber, the other end of the air pipe is connected with primary air of a boiler, and a plurality of air holes are arranged in the leading-out section in an array on the outer wall of the drying air chamber area.

5. The coal chute high-temperature drying anti-blocking system as claimed in claim 4, wherein the air holes are arranged from outside to inside in an inclined manner.

6. The high-temperature drying and anti-blocking system for the coal dropping pipe as claimed in claim 1, wherein the baffle (1) comprises an arc-shaped flow baffle and a flow guiding plate connected with the lower end of the flow baffle, the upper end of the flow baffle is positioned above the outlet of the superior material conveying device, and the flow guiding plate is obliquely arranged.

7. The high-temperature drying and anti-blocking system for the coal drop tube as claimed in claim 6, wherein the included angle between the flow guide plate and the leading-in section is 10-15 °.

8. The high-temperature drying and anti-blocking system for the coal dropping pipe as claimed in claim 1, wherein a vibration hammer (9) is arranged on the coal dropping pipe.

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