CN217675213U - Coal conveying device for blending and burning of power plant boiler - Google Patents

Abstract

The utility model relates to the technical field of coal-fired conveying devices, in particular to a coal-fired conveying device for blending and burning coal of a power plant boiler, which comprises a raw coal bunker shell, wherein a separation structure is arranged on the raw coal bunker shell, the bottom end of the separation structure is provided with a raw coal bunker shell, a driving structure is arranged on the separation structure, a manual structure is arranged on the driving structure, a blanking structure is arranged on the separation structure, and a discharging structure is arranged on the raw coal bunker shell; under the condition of not changing the original coal conveying and distributing system, the coal type entering the coal feeder is controlled only by the separation structure and the driving structure, so that the purpose of quickly changing the coal type is realized; the manual structure is used for driving the separation structure, so that the machine can still run when the driving structure is damaged, and the using effect of the device is improved; the raw coal in the raw coal bunker is controlled to be evenly discharged through the discharging structure, the internal blockage of the raw coal bunker is avoided, and the residual raw coal in the raw coal bunker is discharged through the discharging structure, so that the raw coal can be conveniently utilized next time.

Description

Coal conveying device for blending and burning of power plant boiler

Technical Field

The utility model relates to a coal conveyor technical field, specific coal conveyor that power boiler joined in marriage coal blending and burning usefulness that says so.

Background

Blending coal is one of important ways for meeting the shortage, complexity and changeability of fuel supply of the coal-fired power station boiler in China and improving the operation safety, economy and environmental protection of the unit; in general, the raw coal bins of the boiler are all provided with one coal grinding machine and one coal feeder, one raw coal bin only stores one kind of coal, and new coal on the coal can be burnt only after old coal in the bin is burnt, so that even if coal blending is carried out, the coal blending can only be carried out in a coal yard, and more than two kinds of coal can not be independently stored in one raw coal bin at all; research has been carried out for many years at home and abroad aiming at the mixed coal burning aspect, and abundant achievements are obtained; the existing coal blending and burning cannot well meet the requirements of real-time accurate and rapid combustion optimization and unit flexible operation; therefore, a set of rapid coal blending and burning technology based on raw coal bunker sub-bunker is provided, the existing equipment is slightly modified, rapid coal blending and burning of different coal types is achieved, accurate real-time online switching of the coal types is achieved, the requirement of rapid load change throughout the day is met, high-load burning of high-heat-value low-sulfur coal and low-load burning of low-heat-value high-sulfur coal are achieved, load response is improved, meanwhile, the blending and burning amount of inferior coal is increased, double high benefits of good load response and high economy are obtained, and the market competitiveness of enterprises is powerfully improved.

At present, the domestic coal-fired generating set mainly adopts two modes of 'mixing and blending before the furnace and mixing and burning in the furnace' and 'separately grinding and pulverizing and mixing and burning in the furnace' to carry out mixing and burning; the method is characterized in that different coal types are ground into coal powder by different coal mills and then sent into a furnace for mixed combustion, and has the advantages of small occupied space and convenient operation, but the flexibility of unit operation is influenced; when the unit design coal quality is high-calorific-value bituminous coal, if a certain proportion of low-calorific-value high-sulfur coal is doped, the output of the coal mill is increased when the unit is in full-load operation, the output of the coal mill exceeds the maximum output of the coal mill, and meanwhile, the environmental protection port parameter exceeds the standard, so that the load of the unit is influenced. In addition, the load-lifting rate of the unit is also influenced by the blending combustion of low-calorific-value high-sulfur coal; in recent years, with the increasing scale of new energy installation in China, the requirement of a power grid system on the deep peak regulation flexibility operation capacity of a coal-electric machine set is gradually increased; the coal-electric unit not only needs to be capable of rising to reach the rated load, but also needs to be capable of falling to be low enough to reach 30 percent or even 20 percent of the rated load, and also needs to rise and fall quickly; in the process, the characteristics of the coal types entering the furnace become important and are the key points of the flexible operation of the coal-electricity unit; therefore, the improvement of the flexibility of coal type switching in the process of blending combustion in the furnace has important significance for the flexible operation of the coal-fired generator set.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coal conveyor that power boiler joined in marriage coal and mix burning usefulness for solve coal conveyor among the prior art and can't satisfy the coal and mix the problem that the coal charge of burning process switches in a flexible way in the in-service use process.

The utility model provides a technical scheme that its technical problem adopted discloses a coal fired conveyor that power boiler joined in marriage coal and mix burning usefulness.

The coal bunker comprises a raw coal bunker shell and a separation structure arranged in the raw coal bunker shell, wherein the separation structure divides the inner space of the raw coal bunker shell into two parts.

The separation structure is provided with a driving structure, and the driving structure is used for driving the separation structure to move, so that the flexible switching of the coal and the coal materials is realized.

Raw coal bunker shell bottom is provided with ejection of compact structure, and the structural discharge opening of having seted up of ejection of compact, and ejection of compact structure is used for empting the inside remaining raw coal of raw coal bunker shell, and raw coal bunker shell bottom sets up raw coal bunker shell in addition, and raw coal bunker shell position corresponds with the separation structure position.

And a blanking structure is arranged on the separation structure and controls the uniform blanking of the coal in the raw coal bunker.

In some embodiments of the present application, the separation structure includes a partition plate, the partition plate is disposed inside a raw coal bunker housing, one end of the raw coal bunker housing is provided with an insertion plate, the inside of the insertion plate is slidably connected with two symmetrically disposed sliding plates, the inside of the sliding plates is in threaded connection with a screw rod, and the screw rod is rotatably connected with the sliding plates;

wherein the end of the screw is fixed to the drive structure.

In some embodiments of the present application, two guide rods are slidably connected to the inside of the slide plate, the guide rods are arranged parallel to the screw rod, and one end of each guide rod is fixed to the inside of the insert plate.

In some embodiments of the application, the driving structure includes a connecting rod, the outside of the connecting rod is slidably connected with a mounting sleeve, a first gear is fixed outside the mounting sleeve, a second gear is meshed with one side of the first gear, the first gear and the second gear are helical gears, one side of the second gear is provided with a first motor, and the first motor is perpendicular to the direction of the connecting rod.

In some embodiments of the application, the driving structure is further provided with a manual structure, the manual structure includes a first rotating shaft, the first rotating shaft is slidably connected to the inserting plate, a third gear is fixed outside the first rotating shaft, a fourth gear is arranged at an end of the connecting rod on one side of the third gear, the third gear and the fourth gear are helical gears, an end of the first rotating shaft is rotatably connected to a push rod, the push rod is slidably connected to the inserting plate, and the end of the push rod is rotatably connected to the outside of the mounting sleeve.

In some embodiments of the present application, a handwheel is disposed at an end of the first rotating shaft, and the handwheel is detachably connected to the first rotating shaft.

In some embodiments of the application, the blanking structure includes mounting frames symmetrically arranged on two sides of the partition board, the cross section of the mounting frame is a U-shaped structure, a second motor is arranged inside the mounting frame, a second rotating shaft is arranged at the end of the second motor, the second rotating shaft is rotatably connected with the mounting frame, and a spirally arranged lower material sheet is arranged outside the second rotating shaft.

In some embodiments of this application, the both sides of former coal bunker shell are located to the discharge opening symmetry, and the inside of discharge opening is equipped with the installation lid, and the inside of installation lid is equipped with the third pivot, and the both ends of third pivot are rotated and are connected in the inside of former coal bunker shell.

In some embodiments of this application, the inside sliding connection of the raw coal bunker shell of installation lid bottom has the fixture block, and the one end sliding connection of fixture block is in the inside of fixture block, and one side of fixture block is equipped with spacing, and spacing and the cross-section of fixture block constitute T-shaped structure jointly.

In some embodiments of this application, one side of fixture block is equipped with reset spring, and reset spring's one end is fixed in the inside of raw coal bunker shell.

The beneficial effects of the utility model are that:

the coal blending combustion method has the advantages that the rapid coal blending combustion of different coal types is realized, the accurate real-time on-line coal type switching is realized, the requirement of rapid load variation all day is met, high-load combustion high-calorific-value coal is realized, low-load combustion low-calorific-value coal is realized, the load response is improved, the blending combustion amount of low-calorific-value coal is increased, the dual high benefits of good load response and high economy are obtained, and the market competitiveness of enterprises is powerfully improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of the overall structure of a preferred embodiment of a coal conveyor for blending coal with a boiler of a power plant according to the present invention;

fig. 2 is a schematic view of the connection structure of the separation structure, the driving structure and the manual structure of the present invention;

FIG. 3 is a schematic view of the connection structure of the raw coal bunker housing, the blanking structure and the discharging structure of the present invention;

fig. 4 is a schematic view of the connection structure of the blanking structure, the partition plate, the raw coal bunker housing, the discharging structure and the blanking structure of the present invention;

FIG. 5 is an enlarged view of the part A shown in FIG. 1;

FIG. 6 is an enlarged view of the part B shown in FIG. 1;

FIG. 7 is an enlarged view of the structure of the portion C shown in FIG. 2;

FIG. 8 is an enlarged view of the structure of the portion D shown in FIG. 3;

fig. 9 is an enlarged view of the structure of the portion E shown in fig. 4.

In the figure: 1. a raw coal bunker housing; 2. a raw coal hopper shell; 3. a partition structure; 301. a partition plate; 302. inserting plates; 303. a slide plate; 304. a screw; 305. a guide bar; 401. a connecting rod; 402. installing a sleeve; 403. a first gear; 404. a second gear; 405. a first motor; 5. a manual structure; 501. a hand wheel; 502. a first rotating shaft; 503. a third gear; 504. A fourth gear; 505. a push rod; 601. a mounting frame; 602. a second motor; 603. a second rotating shaft; 604. feeding a material sheet; 7. a discharging structure; 701. a discharge hole; 702. installing a cover; 703. a third rotating shaft; 704. a clamping block; 705. a return spring; 706. and (7) a limiting strip.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-9, the utility model discloses a coal conveying device for blending and burning coal of a power plant boiler, which comprises a raw coal bunker shell 1 and a separation structure 3 arranged in the raw coal bunker shell 1, wherein the separation structure 3 divides the internal space of the raw coal bunker shell 1 into two parts.

The separation structure 3 is provided with a driving structure, and the driving structure is used for driving the separation structure 3 to move;

the discharging structure 7 is arranged at the bottom of the raw coal bin shell 1, a discharging hole 701 is formed in the discharging structure, and the discharging structure 7 is used for dumping the residual raw coal in the raw coal bin shell;

the bottom of the raw coal bunker housing 1 is also provided with a raw coal bunker housing 2, and the position of the raw coal bunker housing 2 corresponds to the position of the separation structure 3;

the separation structure 3 is provided with a blanking structure which controls the uniform blanking of the coal in the raw coal bunker housing 1.

It should be noted that, the application provides a coal-fired conveyor that power boiler blending coal of power plant was used jointly burns, through implementing a small amount of transformation to current equipment, add separation structure 3 in the inside of raw coal bunker shell 1, through the motion of drive structure control separation structure, simultaneously, ejection of compact structure 7 is used for leading different coal charges into the furnace by raw coal scuttle shell 2, the quick coal blending of different coal types has been realized, realize accurate real-time online switching coal type, meet the requirement of the quick variable load of whole day, high load burns high calorific value coal, low-load burns low calorific value, improve the load response, increase the volume of mixing burning of low-heat coal simultaneously, the double high profit that load response is good and economic nature is high has been obtained, the market competitiveness of strong promotion enterprise.

Meanwhile, the workload of the existing coal bunker reconstruction is small, the investment is small, the change of a boiler powder-making system is not large, a coal hopper bin is not required to be added, a coal feeder and a coal pulverizer are not required to be added, the coal feeding system is not required to be changed at all, the existing raw coal bunker is used for storing two different coal types, a necessary monitoring means is used for realizing the purpose of changing the coal types on line in real time, the raw coal bunker can be used for blending two coal types after the reconstruction is finished, and meanwhile, the raw coal bunker of a single coal type can be used.

In a specific embodiment of the present application, as shown in fig. 1 to 9, the partition structure 3 includes a partition plate 301, the partition plate 301 is disposed inside the raw coal bunker housing 1, an insertion plate 302 is disposed at an end of the raw coal bunker housing 2, two sliding plates 303 symmetrically disposed are slidably connected inside the insertion plate 302, a screw 304 is threadedly connected inside the sliding plate 303, the screw 304 is rotatably connected with the sliding plates 303, and a driving structure is disposed at an end of the screw 304; two guide rods 305 are slidably connected to the inside of the slide plate 303, the guide rods 305 are arranged parallel to the screw 304, and one end of each guide rod 305 is fixed to the inside of the insert plate 302.

It should be noted that, the setting of guide bar 305 greatly improves the stability of slide 303 when sliding, and the drive structure drive of being convenient for separates structure 3, and then realizes that one coal bunker and one coal feeder supply two kinds of different coal simultaneously, realizes the needs that change boiler blending in real time, satisfies the requirement of boiler different loads to the coal quality and realizes that one coal bunker and one coal feeder supply two kinds of different coal simultaneously, realizes the needs that change boiler blending in real time, satisfies the requirement of boiler different loads to the coal quality.

In one embodiment of the present application, as shown in fig. 1 to 9, the driving structure includes a connecting rod 401, a mounting sleeve 402 is slidably connected to an outer portion of the connecting rod 401, a first gear 403 is fixed to an outer portion of the mounting sleeve 402, a second gear 404 is engaged with one side of the first gear 403, the first gear 403 and the second gear 404 are both helical gears, a first motor 405 is disposed on one side of the second gear 404, and the first motor 405 is perpendicular to the connecting rod 401.

It should be noted that, according to the technical scheme of the application, one coal bunker and one coal feeder can simultaneously supply two different coal types, the requirement of changing the coal blending of the boiler is realized in real time, the requirement of different loads of the boiler on the coal quality is met, the requirement of changing the coal blending of the boiler is realized, and the requirement of different loads of the boiler on the coal quality is met.

In other embodiments of the present application, as shown in fig. 1-9, the drive arrangement further comprises a manual arrangement 5.

The manual structure 5 comprises a first rotating shaft 502, the first rotating shaft 502 is slidably connected to the inserting plate 302, a third gear 503 is fixed outside the first rotating shaft 502, a push rod 505 is rotatably connected to an end portion of the first rotating shaft 502, the push rod 505 is slidably connected to the inserting plate 302, and an end portion of the push rod 505 is rotatably connected to an outside of the mounting sleeve 402; a fourth gear 504 is provided at an end of the connecting rod 401 on the third gear 503 side, and both the third gear 503 and the fourth gear 504 are helical gears.

Based on the above description, in other embodiments of the present application, a handwheel 501 is disposed at an end of the first rotating shaft 502, and the handwheel 501 is detachably connected to the first rotating shaft 502.

It should be noted that, through 5 drive division structures 3 of manual structure, can't accurate regulation and control the input volume of the inside good coal in raw coal bunker and inferior coal when having avoided the damage of the inside subassembly of drive structure, when the setting up of manual structure 5 has guaranteed that drive structure damages or changes, the machine still can operate, has improved the result of use of device greatly.

In one embodiment of the present application, as shown in fig. 1 to 9, the blanking structure includes mounting brackets 601, two mounting brackets 601 are symmetrically disposed on two sides of the partition 301, a cross section of each mounting bracket 601 is a U-shaped structure, a second motor 602 is disposed inside each mounting bracket 601, an end of each second motor 602 is provided with a second rotating shaft 603, the second rotating shaft 603 is rotatably connected to the mounting brackets 601, and a spirally disposed lower material sheet 604 is disposed outside each second rotating shaft 603.

In a specific embodiment of the present application, two discharge holes 701 are provided, and the two discharge holes 701 are symmetrically provided at two sides of the raw coal bunker housing 1.

An installation cover 702 is arranged inside the discharge hole 701, a third rotating shaft 703 is arranged inside the installation cover 702, and two ends of the third rotating shaft 703 are rotatably connected inside the raw coal bin shell 1; a clamping block 704 is connected to the inside of the raw coal bunker housing 1 at the bottom end of the mounting cover 702 in a sliding manner, one end of the clamping block 704 is connected to the inside of the clamping block 704 in a sliding manner, a limiting strip 706 is arranged on one side of the clamping block 704, and the limiting strip 706 and the clamping block 704 form a T-shaped structure together.

One side of the fixture block 704 is provided with a return spring 705, and one end of the return spring 705 is fixed inside the raw coal bunker housing 1.

In practical application, when coal is discharged, the second motor 602 inside the mounting frame 601 is started, the second motor 602 rotates to drive the second rotating shaft 603 to rotate, the second rotating shaft 603 rotates to drive the lower material sheet 604 to rotate, the lower material sheet 604 is spirally arranged, coal is uniformly conveyed to the bottom end of the raw coal bin, when residual raw coal inside the raw coal bin needs to be drawn out, the limiting strips 706 are pushed, the limiting strips 706 further drive the fixture block 704 to slide, the reset spring 705 compresses, the fixture block 704 slides out of the mounting cover 702, the mounting cover 702 is rotated, the mounting cover 702 drives the third rotating shaft 703 to rotate, the discharge hole 701 is opened, the lower material sheet 604 discharges the raw coal to one side of the discharge hole 701, and the raw coal directly slides out of the discharge hole 701 due to centrifugal action.

It should be noted that the discharging structure is used for controlling the uniform discharging of the coal in the raw coal bunker, so that the internal blockage of the raw coal bunker is avoided, and the discharging structure 7 is used for pouring out the raw coal to be abandoned in the raw coal bunker, so that the raw coal can be utilized next time.

The actual use process of the solution of the present application (as shown in fig. 1-9) includes an automatic process and a manual process.

(1) An automatic process:

a partition plate 301 is used for separating a raw coal bin inside a raw coal bin shell 1, half of the separated raw coal bin is filled with coal, and the other half of the separated raw coal bin is filled with inferior coal;

according to the requirements of different loads and depth peak regulation, the first motors 405 at two ends of the plug board 302 are automatically started, the first motors 405 further drive the second gears 404 to rotate, the second gears 404 rotate and further drive the first gears 403 to rotate, and the first gears 403 rotate and further drive the mounting sleeves 402 to rotate;

the installation sleeve 402 rotates to drive the connecting rod 401 to rotate, the connecting rod 401 rotates to drive the screw 304 to rotate, the screw 304 rotates to drive the sliding plate 303 to slide in the inserting plate 302, the sliding plate 303 slides, the raw coal bin is communicated with the raw coal hopper, and raw coal adaptive to load is provided for the coal feeder in real time.

(2) Manual process

When the first motor 405 of the driving structure cannot be used normally, or the first motor 405 needs to be replaced, the bolt on the insertion plate 302 is detached, the bolt is disconnected with the push rod 505, the push rod 505 can slide between the insertion plate 302, two holes are formed in the push rod 505, after the push rod 505 is adjusted to a proper position, the bolt is limited, the hand wheel 501 is pushed, the hand wheel 501 further drives the first rotating shaft 502 to slide, the third gear 503 outside the first rotating shaft 502 is further meshed with the fourth gear 504 at the end of the connecting rod 401, meanwhile, the push rod 505 at the end of the first rotating shaft 502 slides to further push the mounting sleeve 402 to slide outside the connecting rod 401, the mounting sleeve 402 further drives the first gear 403 to slide, the first gear 403 further disengages from the meshing state with the second gear 404, the hand wheel 501 rotates to further drive the first rotating shaft 502 to rotate, the first rotating shaft 502 further drives the third gear 503 to rotate, the third gear 503 rotates to further drive the fourth gear 504 to rotate, the fourth gear 504 rotates to further drive the connecting rod 401 to rotate, the connecting rod 304 to further drive the sliding plate 303 to slide to open or close the original coal bunker.

Based on the operation process, the raw coal bunker of the technical scheme has the advantages of low modification cost, simple and convenient overall operation and reliable operation, and can completely change the defects of time lag, incapability of timely changing coal types and incapability of coping with the precise coal blending situation when the load is changed rapidly by responding to the change of the unit load rapidly, thereby realizing the 'high peak top and low valley top' of the unit load and fundamentally solving the contradiction between the unit load response and the precise coal blending.

In addition, the boiler combustion is accurately adjusted, the flexibility requirement of the thermal power generating unit is met, the requirement for exerting auxiliary service of the unit is met, the advantages of the thermal power generating unit are exerted on the aspects that the thermal power generating unit participates in auxiliary service, frequency modulation and the like of a power grid, the competitiveness of the thermal power generating unit is improved, and huge benefits are brought to the enterprises for increasing the income and saving the expenditure; the blending combustion amount of the low-quality coal is improved, the requirement of rapid load change all day is flexibly met, powerful guarantee is provided for the torsion loss increase, the quality improvement and the efficiency improvement of enterprises, and the market competitiveness of the enterprises is further improved.

Calculated by the current market, 7000 calorie high-calorific value low-sulfur standard coal is about 1350 yuan/t to the plant price, low-calorific value high-sulfur coal is about 1250 yuan/t to the plant price, 50t/h of output is given to each coal feeder, half of loads are taken, operating hours in the year are 5000h, the low-calorific value high-sulfur coal accounts for 50% in the whole year, the investment rate of sub-warehouse operation is considered according to 40%, and the annual income is as follows: (50 t/h-25 t/h) × 5000 hx (1350 yuan/t-1250 yuan/t) × 50% >, 40% =250 ten thousand yuan.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A coal-fired conveying device for blending and burning coal of a power plant boiler is characterized by comprising a raw coal bunker shell and a separation structure arranged in the raw coal bunker shell;

the separation structure divides the internal space of the raw coal bunker shell into two parts;

the separation structure is provided with a driving structure, and the driving structure is used for driving the separation structure to move;

a discharging structure is arranged at the bottom of the raw coal bunker shell, a discharging hole is formed in the discharging structure, and the discharging structure is used for dumping the residual coal in the raw coal bunker shell;

a raw coal hopper shell is arranged at the bottom of the raw coal bunker shell, and the position of the raw coal hopper shell corresponds to the position of the separation structure;

and a blanking structure is arranged on the separation structure and used for controlling the blanking of the coal in the raw coal bunker.

2. The coal conveying device for blending and burning coal of the power plant boiler according to claim 1, characterized in that: the separation structure comprises a partition plate, and the partition plate is arranged inside the raw coal bin shell;

an inserting plate is arranged at one end of the raw coal hopper shell, two sliding plates which are symmetrically arranged are connected to the inner portion of the inserting plate in a sliding mode, a screw rod is connected to the inner portion of each sliding plate in a threaded mode, and the screw rod is rotatably connected with the sliding plates;

wherein the end of the screw is fixed to the driving structure.

3. The coal conveying device for blending coal with power plant boiler of claim 2, characterized in that: the inside sliding connection of slide has two guide bars, guide bar and screw rod parallel arrangement, the one end of guide bar is fixed in the inside of picture peg.

4. The coal conveying device for blending and burning coal of the power plant boiler according to claim 1, characterized in that: the driving structure comprises a connecting rod;

the outer sliding connection of connecting rod has the installation cover, the outside of installation cover is fixed with first gear, one side meshing of first gear has the second gear, first gear is the helical gear with the second gear, one side of second gear is equipped with first motor, first motor is perpendicular with the connecting rod direction.

5. The coal conveying device for blending and burning of power plant boiler coal according to claim 4, characterized in that: a manual structure is also arranged on the driving structure;

the manual structure comprises a first rotating shaft, the first rotating shaft is connected to the inserting plate in a sliding mode, and a third gear is fixed to the outer portion of the first rotating shaft;

a fourth gear is arranged at the end part of the connecting rod at one side of the third gear, and the third gear and the fourth gear are both helical gears;

the tip of first pivot rotates and is connected with the push rod, sliding connection between push rod and the picture peg, the tip of push rod rotates to be connected in the outside of installation cover.

6. The coal conveying device for blending and burning coal of the power plant boiler according to claim 5, characterized in that: the end part of the first rotating shaft is provided with a hand wheel, and the hand wheel is detachably connected with the first rotating shaft.

7. The coal conveying device for blending and burning coal of the power plant boiler according to claim 2, characterized in that: the blanking structure comprises mounting frames symmetrically arranged on two sides of the partition plate;

the cross-section of mounting bracket is the U-shaped structure, the inside of mounting bracket is equipped with the second motor, the tip of second motor is equipped with the second pivot, rotate between second pivot and the mounting bracket and be connected, the outside of second pivot is equipped with spiral arrangement's lower tablet.

8. The coal conveying device for blending and burning coal of the power plant boiler according to claim 1, characterized in that: the both sides of former coal bunker shell are located to the discharge opening symmetry, the inside of discharge opening is equipped with the installation lid, the inside of installation lid is equipped with the third pivot, the both ends of third pivot are rotated and are connected in the inside of former coal bunker shell.

9. The coal conveying device for blending and burning coal of the power plant boiler according to claim 8, characterized in that: the coal bunker mounting structure is characterized in that a clamping block is slidably connected to the inner portion of the raw coal bunker housing at the bottom end of the mounting cover, one end of the clamping block is slidably connected to the inner portion of the clamping block, a limiting strip is arranged on one side of the clamping block, and the limiting strip and the clamping block form a T-shaped structure together.

10. The coal conveying device for blending coal with power plant boiler of claim 9, characterized in that: and one side of the clamping block is provided with a return spring, and one end of the return spring is fixed in the raw coal bin shell.

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