CN113996237A - Various switching allotment mechanism in two coal bunkers - Google Patents
Various switching allotment mechanism in two coal bunkers Download PDFInfo
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- CN113996237A CN113996237A CN202111296484.5A CN202111296484A CN113996237A CN 113996237 A CN113996237 A CN 113996237A CN 202111296484 A CN202111296484 A CN 202111296484A CN 113996237 A CN113996237 A CN 113996237A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
Abstract
The invention discloses a double-bunker multiple-switching and allocating mechanism. Including first coal bunker and second coal bunker, it is equipped with the batching pipe to be connected between first coal bunker and the second coal bunker, the batching pipe sets up for the slope, be equipped with spiral reamer feed mechanism in the batching pipe, spiral reamer feed mechanism includes driving motor and spiral guide reamer, the last speed governing that connects of spiral reamer feed mechanism turns to the receiver, the junction of batching pipe and second coal feeding pipe is equipped with prevents stifled knocker, first coal feeding pipe and second coal feeding pipe are connected with the coal feeder, the coal feeder is connected to the coal pulverizer through the coal breakage union coupling be equipped with blanking flashboard door in the middle of the coal breakage pipe. The gain effect of the invention is as follows: the invention has simple and reliable structural modification scheme, less early investment and great benefit generation, can realize rapid coal type allocation and co-combustion of different coal types through the coal feeder, can better realize in-furnace co-combustion, reduces the problems of uneven thermal load, slagging on the pipe wall, over-temperature of the wall and the like in the furnace, and improves the efficiency of the boiler and the safety of equipment.
Description
Technical Field
The invention relates to the technical field of coal blending of coal bunkers of a thermal power plant, in particular to a double-coal-bunker multi-switching blending mechanism.
Background
The electric power market is characterized by strong real-time performance, particularly along with the development of the spot market, the difficulty that a power plant must face is how to respond to external real-time load change under the condition of reducing the power generation cost, and the multiple peak power generation and the reduction of load limitation examination are also important profit growth points.
With the continuous upgrading and improvement of the energy-saving technology of the thermodynamic system, the energy-saving space deeply excavated on equipment is less and less, the investment is extremely large, the cost of fuel in a thermal power plant is close to 70%, and the search for new profit breakthrough points on the fuel is a great trend and large space, which is an important problem for cost reduction and efficiency improvement of the coal-fired power plant and even a key for determining the survival and death of the power plant. The main factors influencing the price of the fuel are the calorific value of the fuel and the sulfur content. Therefore, the reduction of fuel cost in coal-fired thermal power plants mainly reduces the calorific value of purchased fuel and improves the sulfur content of the fuel.
The continuous reduction of the heat value of the fuel fed into the boiler of the power plant causes the load carrying capacity of the unit to be reduced, the powder making system loses standby equipment and even cannot meet the dispatching requirement of a power grid, so that the income of the thermal power plant is reduced, the output is limited to be checked, the profit of the power plant is reduced, and the image of the power plant is damaged.
The increase of the sulfur content of the fuel exceeds the disposal capability of environmental protection equipment of a power plant, and the environmental protection index exceeds the standard, so that the benefits of the power plant and the society are damaged. The middle buffering function of the coal bunker of the coal pulverizing system causes that the fuel adjustment can not meet the real-time change requirement of the load. The design capacity specification of the coal bunker is to meet the 10-hour consumption of the unit. Even if the operating personnel operate at the low coal level of 150-300 tons by controlling part of coal bunkers so as to adjust the coal blending in time according to the load change and meet the load requirement, the replacement of the coal stored in the coal bunkers can be basically adjusted in place within more than 4 hours each time, the real-time change requirement and the environmental protection requirement of the load are difficult to meet, and the operation safety, the environmental protection and the economy are also reduced.
The power plant has to face the dilemma of responding to the external real-time load change under the condition of reducing the power generation cost; at present, seawater is mainly adopted for desulfurization treatment, the process has weak desulfurization capacity and high sulfur sensitivity, the sulfur content exceeds the limit, no effective and rapid adjustment means is provided except that the load is greatly reduced, and the environmental protection index control pressure is extremely high; the design capacity of the existing coal bunker is 660 tons, the consumption of 10 hours is met, but the replacement of coal stored in the coal bunker in each time can be basically adjusted in place within more than 4 hours, the real-time change requirement and the environmental protection requirement of the load are difficult to meet, and the operation safety, the environmental protection property and the economical efficiency are reduced.
Based on the above points, a new technical scheme which is convenient to modify and low in cost and can realize flexible switching and allocation of coal type blending of each coal bunker is urgently needed by a coal-fired thermal power plant, so that the current situation of serious mismatching between the inherent large buffer change characteristic of fuel blending and the real-time change characteristic of external load is changed in a regulating and controlling manner.
Disclosure of Invention
The invention aims to provide a coal blending flexibility improvement idea, eliminate the great buffer memory characteristic of a coal bunker of a coal pulverizing system, enable a fuel system to respond to load requirements with zero time lag, utilize the characteristics of equipment to the maximum extent, blend and burn economic coal types to the maximum extent, and create great economic benefits for a power plant.
In order to solve the technical problems, the invention adopts the technical scheme that:
a double-bunker diverse switching and blending mechanism comprises a first bunker and a second bunker, wherein a blending guide pipe is connected between the first bunker and the second bunker, a first coal feeding pipe is connected to the bottom of the first bunker, a second coal feeding pipe is connected to the bottom of the second bunker, a first gate plate door is arranged between the bottom of the first bunker and the first coal feeding pipe, a second gate plate door is arranged between the bottom of the second bunker and the second coal feeding pipe, the blending guide pipe is arranged in an inclined manner, a spiral reamer blending mechanism is arranged in the blending guide pipe and comprises a transmission motor and a spiral guide reamer, the axis of the spiral guide reamer is coincided with the axis of the blending guide pipe, a speed-regulating steering receiver is connected to the spiral reamer blending mechanism, the material supplementing end of the blending guide pipe is connected below the conical side wall of the first bunker and is positioned above the first gate plate door, the batching end of the batching pipe is connected to the outer wall of the second coal feeding pipe and located below the second flashboard door, an anti-blocking vibrator is arranged at the joint of the batching pipe and the second coal feeding pipe, the first coal feeding pipe and the second coal feeding pipe are connected with a coal feeder, the coal feeder is connected to a coal pulverizer through a coal dropping pipe, and a blanking flashboard door is arranged in the middle of the coal dropping pipe.
Preferably, a feed opening of the first coal feeding pipe is mounted on a first coal feeder, a feed opening of the second coal feeding pipe is mounted on a second coal feeder, a first coal dropping pipe at the lower end of the first coal feeder is connected to a first coal mill, a third gate plate door is arranged in the middle of the first coal dropping pipe, a second coal dropping pipe at the lower end of the second coal feeder is connected to a second coal mill, and a fourth gate plate door is arranged in the middle of the second coal dropping pipe.
Preferably, the first coal feeding pipe and the second coal feeding pipe are connected with a double-belt coal feeder, two-way coal feeding conveying belts are symmetrically arranged in the double-belt coal feeder, a distributing coal dropping pipe and a mixing coal dropping pipe are arranged below the double-belt coal feeder, the distributing coal dropping pipe is arranged on two sides below the double-belt coal feeder, a receiving port of the distributing coal dropping pipe is arranged below a blanking side outside the two-way coal feeding conveying belts, the distributing coal dropping pipe is connected with a distributing coal mill, a distributing gate is arranged in the middle of the distributing coal dropping pipe, the mixing coal dropping pipe is arranged in the middle of the distributing coal dropping pipe, a receiving port of the mixing coal dropping pipe is arranged below a blanking side in the middle of the two-way coal feeding conveying belts, the mixing coal dropping pipe is connected to the mixing coal mill, and a mixing gate is arranged in the middle of the mixing coal dropping pipe.
Preferably, the upper end of spiral guide reamer flushes with the feed supplement mouth of batching pipe, the lower extreme discharge end setting of spiral guide reamer is in the batching mouth top of batching pipe.
Preferably, the batching pipe is a stainless steel pipe with a large-caliber smooth and wear-resistant inner wall, a gap of 1-2cm is reserved between the outer edge of the spiral guide reamer and the inner wall of the batching pipe, the edge of the spiral guide reamer is kept from colliding with the inner wall of the batching pipe, and the safety during batching switching is ensured.
Preferably, prevent stifled rapping device setting at the lower extreme batching mouth outer wall of batching pipe, set up and can utilize the gravity action better in the below for pile up the coal cinder at the discharge gate and drop down more fast, reach better clear stifled sediment effect of arranging.
Preferably, the feeding port of the material mixing conduit is arranged at a position higher than that of the material mixing port, and the inclined angle of the material mixing conduit is set to be 50-80 degrees so as to keep necessary smooth conveying of the coal mixing communicating pipe.
Preferably, the lower end of the second coal feeding pipe is connected with the feed end of the coal feeder through a step-shaped discharge hole, and the caliber of the feed port at the upper end of the step-shaped discharge hole is smaller than that of the discharge hole at the lower end.
Preferably, the ingredient conduit is provided with CO2The safe inerting system is characterized in that a fault access hole and CO are formed in the pipe wall of the batching guide pipe2The arrangement of the safe inerting system ensures that the coal stored in the pipe does not have the risk of spontaneous combustion, and meets the long-time storage requirement; the trouble shooting hole is used for blockage clearing operation when coal blockage occurs inside the trouble shooting hole.
Preferably, the transmission motor is connected with a speed-regulating steering receiver, and the speed-regulating steering receiver controls the work start-stop, the rotation direction and the rotation speed of the transmission motor.
Further, the transmission motor is a variable frequency driving motor.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple and reliable structural modification scheme, less early investment and huge benefit generation, the invention is realized by modifying the outer part of the raw coal bunker of the coal-fired thermal power plant, the system modification amount is very small, if the units of the plant operate for 7000 hours per year, each unit modifies two paths of raw coal bunker connecting lines, the real-time rapid switching and blending of high-quality and low-quality fuels in 4 raw coal bunkers between B/C coal bunkers and E/F coal bunkers is realized, and the new benefit increase of each modified unit is estimated to be about 2045.66 ten thousand yuan per year; the rapid coal type allocation can be realized, the complex communication coordination work among multiple departments which is performed in advance to meet the load curve is reduced, and the efficiency is improved; the coal demand requirement caused by the change of the load curve can be responded in real time and quickly, the time of waiting for at least 4 hours for the replacement of the coal stored in the raw coal bunker is eliminated, the most economical coal is combusted to the maximum extent, and the economic benefit is improved; different coal types are combusted through the coal feeder, so that the mixed combustion in the boiler can be better realized, the problems of non-uniform heat load in the boiler, slagging on the pipe wall, over-temperature of the wall temperature and the like are reduced, and the boiler efficiency and the equipment safety are improved; the invention has strong transformation safety, does not change the original system structure, has strong applicability, and is suitable for the transformation of newly built and built old power plants; the invention can solve the problems of frequent daily peak regulation and large peak regulation amplitude of the current thermal power plant, achieve the purpose of coal type blending in real time and meet the social power utilization requirement; the unit can be used for maximally blending and burning various economic coal types in each load section, and the power generation cost is reduced; the complex communication cooperation of multiple departments for meeting the load, environmental protection and economic requirements is reduced, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 4 of the present invention.
The graphic symbols are illustrated as follows:
a first coal bunker-1, a second coal bunker-2, a proportioning guide pipe-3, a first coal feeding pipe-4, a second coal feeding pipe-5, a first gate plate door-6, a second gate plate door-7, a spiral reamer proportioning mechanism-8, a transmission motor-9, a spiral guide reamer-10, a speed-regulating steering receiver-11, an anti-blocking vibrator-12, a first coal feeder-13, a second coal feeder-14, a first coal drop pipe-15, a first coal mill-16, a third gate plate door-17, a second coal drop pipe-18, a second coal mill-19, a fourth gate plate door-20, a double belt coal feeder-21, a bidirectional coal feeding conveyer belt-22, a distributing coal drop pipe-23, a mixing coal drop pipe-24, a distributing coal mill-25, a distributing gate plate door-26, a mixing coal mill-27, a mixing gate-28, a ladder-shaped discharge port-29 and a fault access hole-30.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
To further clarify the objects, features and functions of the present invention, a review board will be provided by referring to the following description taken in conjunction with the accompanying drawings of an embodiment in which:
referring to fig. 1-2, which are schematic structural views of the present invention, the present invention is a dual-bunker multiple-switching blending mechanism, including a first bunker 1 and a second bunker 2, a blending conduit 3 is connected between the first bunker 1 and the second bunker 2, a first coal supply pipe 4 is connected to the bottom of the first bunker 1, a second coal supply pipe 5 is connected to the bottom of the second bunker 2, a first gate door 6 is disposed between the bottom of the first bunker 1 and the first coal supply pipe 4, a second gate door 7 is disposed between the bottom of the second bunker 2 and the second coal supply pipe 5, the blending conduit 3 is disposed in an inclined manner, a helical reamer blending mechanism 8 is disposed in the blending conduit 3, the helical reamer blending mechanism 8 includes a driving motor 9 and a helical reamer 10, an axis of the helical reamer 10 coincides with an axis of the blending conduit 3, connect the speed governing and turn to receiver 11 on the spiral reamer feed mechanism 8, the feed supplement end of batching pipe 3 is connected in the toper lateral wall below of first coal bunker 1 and is located first flashboard door 6 top, the batching end of batching pipe 3 is connected at 5 outer walls of second coal feeding pipe and is located 7 below of second flashboard door, the junction of batching pipe 3 and second coal feeding pipe 5 is equipped with prevents stifled knocker 12, first coal feeding pipe 4 reaches second coal feeding pipe 5 is connected with the coal feeder, the coal feeder is connected to the coal pulverizer through the coal breakage pipe be equipped with blanking flashboard door in the middle of the coal breakage pipe.
Preferably, the feed opening of the first coal feeding pipe 4 is installed on a first coal feeder 13, the feed opening of the second coal feeding pipe 5 is installed on a second coal feeder 14, a first coal dropping pipe 15 at the lower end of the first coal feeder 13 is connected to a first coal mill 16, a third gate door 17 is arranged in the middle of the first coal dropping pipe 15, a second coal dropping pipe 18 at the lower end of the second coal feeder 14 is connected to a second coal mill 19, and a fourth gate door 20 is arranged in the middle of the second coal dropping pipe 18.
Preferably, the first coal feeding pipe 4 and the second coal feeding pipe 5 are connected with a double-belt coal feeder 21, a bidirectional coal feeding conveyer belt 22 is symmetrically arranged in the double-belt coal feeder 21, a material distributing coal dropping pipe 23 and a material mixing coal dropping pipe 24 are arranged below the double-belt coal feeder 21, the distributing coal dropping pipe 23 is arranged at two sides below the double-belt coal feeder 21, the material receiving port of the distributing coal dropping pipe 23 is arranged below the blanking side at the outer side of the bidirectional coal feeding conveyer belt 22, the distributing coal dropping pipe 23 is connected with a distributing coal mill 25, a distributing gate 26 is arranged in the middle of the distributing coal dropping pipe 23, the mixing coal dropping pipe 24 is arranged in the middle of the distributing coal dropping pipe 23, a material receiving port of the mixing coal dropping pipe 24 is arranged below the blanking side in the middle of the two bidirectional coal feeding conveyer belts 22, the mixing coal dropping pipe 24 is connected to a mixing coal mill 27, and a mixing gate 28 is arranged in the middle of the mixing coal dropping pipe 24.
Preferably, the upper end of the spiral material guiding reamer 10 is flush with the material supplementing opening of the material mixing conduit 3, and the lower end discharge end of the spiral material guiding reamer 10 is arranged above the material mixing opening of the material mixing conduit 3.
Preferably, the batching pipe 3 is a large-caliber stainless steel pipe with a smooth and wear-resistant inner wall, and a gap of 1-2cm is reserved between the outer edge of the spiral guide reamer 10 and the inner wall of the batching pipe 3.
Preferably, the anti-blocking rapper 12 is arranged on the outer wall of the lower dosing port of the dosing conduit 3.
Preferably, the lower end of the second coal feeding pipe 5 is connected with the feed end of the coal feeder through a step-shaped discharge hole 29, and the caliber of the upper end feed hole of the step-shaped discharge hole 29 is smaller than that of the lower end discharge hole.
Preferably, the feeding port of the material mixing pipe 3 is arranged at a position higher than that of the material mixing port, the inclination angle of the material mixing pipe 3 is 50-80 degrees, wherein the preferable angle is 70 degrees, and the necessary smooth conveying angle of the material mixing pipe 3 is maintained, so that the necessary smooth conveying of the coal mixing connecting pipe is maintained.
Preferably, said ingredient conduit 3 is provided with CO2The safe inerting system is characterized in that a fault access hole 30 and CO are formed in the pipe wall of the ingredient guide pipe 32The safe inerting system ensures that the coal stored in the pipe does not have the risk of spontaneous combustion, and meets the long-time storage requirement; the manhole 30 is used for cleaning when coal clogging occurs inside.
Preferably, the transmission motor 9 is connected with a speed-regulating steering receiver 11, and the speed-regulating steering receiver 11 controls the operation start, stop, rotation direction and rotation speed of the transmission motor 9.
Further, the transmission motor 9 is a variable frequency driving motor, and can more accurately control the start, stop, rotation and rotation speed of the spiral reamer batching mechanism 8.
The first embodiment:
when the blending combustion of the coal is not needed, the control center does not send a blending signal to the spiral reamer batching mechanism 8, the spiral reamer batching mechanism 8 does not work, the first coal bunker 1 and the second coal bunker 2 are mutually independent, the control center controls the first flashboard door 6 below the first coal bunker 1 to be opened, so that the coal in the first coal bunker 1 falls into the first coal feeder 13 through the first coal feeding pipe 4, then the third flashboard door 17 is opened, the first coal feeder 13 sends the coal species into the first coal mill 16 through the first coal dropping pipe 15 for coal milling and then sends the coal species to the boiler for combustion, meanwhile, a second flashboard door 7 below the second coal bunker 2 is opened, so that the coal in the second coal bunker 2 falls into a second coal feeder 14 through a second coal feeding pipe 5, then, the fourth shutter door 20 is opened, and the second coal feeder 14 sends the coal species into the second coal mill 19 through the second coal dropping pipe 18 for coal milling, and then sends the coal species to the boiler for combustion.
Second embodiment:
when the coal quantity of the first coal bunker 1 needing blending and mixing is less than that of the second coal bunker 2, a control person sends a blending signal to a speed regulation steering receiver 11 of a spiral reamer batching mechanism 8 through a control center, the speed regulation steering receiver 11 sets the rotating speed of a transmission motor 9 according to the coal quantity needing blending, the spiral guide reamer 10 is controlled to be started to blend the coal in the first coal bunker 1 into a second coal supply pipe 5, a second gate door 7 is opened, the coal in the second coal bunker 2 falls down along the second coal supply pipe 5, is mixed with the coal in the first coal bunker 1 and falls into a second coal supply machine 14, then a fourth gate door 20 is opened, and the blended and mixed coal is sent into a second coal mixing mill 19 through a second coal falling pipe 18 to be mixed and ground and then sent to a boiler for burning.
When coal blending starts, the anti-blocking vibrator 12 is started at the same time, so that the problem that the blending guide pipe 3 is blocked due to the fact that coal at the bottom of the blending guide pipe 3 is not piled up and aggregated into blocks is solved, and the smoothness of coal blending is ensured.
The third embodiment:
when the blending combustion of the coal types in the first coal bunker 1 needs to be accelerated, a control person sends a blending signal to the speed-regulating steering receiver 11 of the spiral reamer batching mechanism 8 through the control center, and controls the first gate plate door 6 to be opened and the second gate plate door 7 to be closed, the coal types in the first coal bunker 1 simultaneously fall into the first coal feeder 13 and the second coal feeder 14 through the first coal feeder pipe 4 and the second coal feeder pipe 5, and are simultaneously sent into the first coal mill 16 and the second coal mill 19 for rapid coal grinding, so that the coal grinding supply blending combustion amount of the coal types in the first coal bunker 1 is increased, and the required combustion efficiency is achieved.
The fourth embodiment:
as shown in fig. 2, the present embodiment is similar to the first and second embodiments, except that the present embodiment adopts a structure that the helical reamer burdening mechanism 8 is combined with a double-belt coal feeder 21, so as to improve the efficiency of switching blended coal burning.
When the blending coal is not needed to be blended and burnt, the control center does not send a blending signal to the spiral reamer batching mechanism 8, the spiral reamer batching mechanism 8 does not work, the first coal bunker 1 and the second coal bunker 2 are mutually independent, the control center controls the first gate plate door 6 and the second gate plate door 7 to be opened, coal types in the first coal bunker 1 and the second coal bunker 2 simultaneously fall onto the bidirectional coal feeding conveying belt 22 of the double-belt coal feeder 21 through the first coal feeding pipe 4 and the second coal feeding pipe 5, the bidirectional coal feeding conveying belt 22 rotates towards the distributing coal falling pipes 23 on two sides in opposite directions, the coal types on the bidirectional coal feeding conveying belt 22 are respectively conveyed to the distributing coal falling pipes 23 on two sides, and fall onto the corresponding distributing coal grinding mill 25 to grind coal and then carry out blending and burning.
When the coal type quantity of the first coal bunker 1 needing to be blended and burned is larger than that of the second coal bunker 2, a control person sends a blending signal to a speed-regulating steering receiver 11 of a spiral reamer batching mechanism 8 through a control center, the speed-regulating steering receiver 11 sets the rotating speed of a transmission motor 9 according to the coal type quantity needing to be blended, a spiral guide reamer 10 is controlled to start to blend the coal type in the first coal bunker 1 into a second coal supply pipe 5, a first gate door 6 and a second gate door 7 are opened together, the coal type in the second coal bunker 2 falls down along the second coal supply pipe 5, the coal type mixed with the coal type in the first coal bunker 1 and the coal type in the first coal bunker 1 fall onto a bidirectional coal supply conveyer belt 22 of a double-belt coal feeder 21 at the same time, the bidirectional coal supply conveyer belt 22 rotates towards the middle in the opposite direction, and the coal type of the first coal bunker 1 falling on the bidirectional coal supply conveyer belt 22 and the mixed coal type are subjected to secondary coal blending, and the mixing damper door 28 opens the re-mixing coal dropping pipe 24 to send the mixed coal to the mixing coal mill 27 for final mixing and coal grinding.
In the embodiment of the invention, the spiral reamer batching mechanism 8 and the double-belt coal feeder 21 are arranged, and the control center regulates and controls the coal feeding rotating speed of the spiral reamer batching mechanism 8, the coal conveying rotating speed and the coal conveying rotating direction of the bidirectional coal feeding conveying belt 22 of the double-belt coal feeder 21 according to production requirements, so that the coal feeding and mixing efficiency of the first coal bunker 1 and the second coal bunker 2 can be quickly adjusted. When the coal type in the first coal bunker 1 needs to be allocated to the distributing coal mill 25 on the corresponding side of the second coal bunker 2, the control center sends a regulation instruction, the coal feeding rotating speed of the spiral guide reamer 10 and the bidirectional coal feeding conveyer belt 22 is controlled according to the coal feeding amount of the spiral guide reamer 10 and the bidirectional coal feeding conveyer belt 22, and the coal type in the first coal bunker 1 is quickly allocated to the distributing coal mill 25 for coal milling treatment; when the coal in the first coal bunker 1 needs to be allocated to the coal in the second coal bunker 2 for coal mixing and coal grinding, the control center sends a regulation instruction, the spiral reamer batching mechanism 8 simultaneously drops the coal in the first coal bunker 1 and the coal in the second coal bunker 2 for coal mixing, the single-side bidirectional coal feeding conveyer belt 22 is opened to convey the mixed coal to the mixing coal mill 27 for coal grinding, and the purpose of accurately regulating and controlling the coal mixing amount is achieved; when the coal in the first coal bunker 1 needs to be allocated to the coal in the second coal bunker 2 for coal blending and coal grinding, and the required blending amount of the coal in the first coal bunker 1 is greater than that of the coal in the second coal bunker 2, the control center sends a regulation instruction, except for the spiral reamer batching mechanism 8, the first gate plate door 6 is opened to simultaneously drop the coal type of the first coal bunker 1 and the coal type of the second coal bunker 2, so that the coal type in the first coal bunker 1 simultaneously falls onto the two-way coal feeding conveying belt 22 on the other side of the double-belt coal feeder 21, the two-way coal feeding conveying belts 22 on the two sides simultaneously convey the coal type to the middle, the primarily mixed coal type is mixed with the coal type in the first coal bunker 1 again to reach a required coal mixing proportion, the material mixing gate plate door 28 is opened to be sent to the material mixing coal grinding machine 27 for coal grinding, and the purpose of mixing and grinding the coal type in the first coal bunker 1 and the coal type in the second coal bunker 2 according to a required proportion is achieved.
The invention can realize the establishment of the simple conveying device between the coal bunkers, achieve the aim of coal blending switching in different modes and meet the aim of coal burning requirements under different conditions.
When the coal types in the first coal bunker 1 cannot be supplemented in time, an action instruction can be sent to the speed-regulating steering receiver 11 through the control center, the speed-regulating steering receiver 11 controls the transmission motor 9 to rotate reversely, the residual coal types in the blending guide pipe 3 are conveyed to the first coal bunker 1 in the direction, and emergency coal feeding and grinding processing are carried out.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a two various switching of coal bunker allotment mechanism which characterized in that: the coal blending device comprises a first coal bunker and a second coal bunker, wherein a blending guide pipe is connected between the first coal bunker and the second coal bunker, a first coal feeding pipe is connected to the bottom of the first coal bunker, a second coal feeding pipe is connected to the bottom of the second coal bunker, a first gate plate door is arranged between the bottom of the first coal bunker and the first coal feeding pipe, a second gate plate door is arranged between the bottom of the second coal bunker and the second coal feeding pipe, the blending guide pipe is arranged in an inclined mode, a spiral reamer batching mechanism is arranged in the blending guide pipe and comprises a transmission motor and a spiral guide reamer, the axis of the spiral guide reamer coincides with the axis of the blending guide pipe, a speed-regulating steering receiver is connected to the spiral reamer batching mechanism, the material supplementing end of the blending guide pipe is connected below the tapered side wall of the first coal bunker and located above the first gate plate door, the batching end of the blending guide pipe is connected to the outer wall of the second coal feeding pipe and located below the second gate plate door, the anti-blocking vibrator is arranged at the joint of the batching guide pipe and the second coal feeding pipe, the first coal feeding pipe and the second coal feeding pipe are connected with the coal feeder, the coal feeder is connected to the coal mill through a coal dropping pipe, and a blanking flashboard door is arranged in the middle of the coal dropping pipe.
2. The dual-bunker multiple-switching blending mechanism of claim 1, wherein a feed opening of the first coal supply pipe is installed on a first coal supply machine, a feed opening of the second coal supply pipe is installed on a second coal supply machine, a first coal drop pipe at the lower end of the first coal supply machine is connected to a first coal mill, a third gate door is arranged in the middle of the first coal drop pipe, a second coal drop pipe at the lower end of the second coal supply machine is connected to the second coal mill, and a fourth gate door is arranged in the middle of the second coal drop pipe.
3. The multiple switching and allocating mechanism of dual coal bunkers according to claim 1, the first coal feeding pipe and the second coal feeding pipe are connected with a double-belt coal feeder, bidirectional coal feeding conveying belts are symmetrically arranged in the double-belt coal feeder, a distributing coal dropping pipe and a mixing coal dropping pipe are arranged below the double-belt coal feeder, the distributing coal dropping pipes are arranged at two sides below the double-belt coal feeder, the material receiving opening of the distributing coal dropping pipe is arranged below the blanking side at the outer side of the bidirectional coal feeding conveyer belt, the distributing coal dropping pipe is connected with a distributing coal mill, a material distributing gate is arranged in the middle of the material distributing coal dropping pipe, the material mixing coal dropping pipe is arranged in the middle of the material distributing coal dropping pipe, the material receiving opening of the material mixing coal dropping pipe is arranged below the blanking side in the middle of the two bidirectional coal feeding conveying belts, the mixing coal dropping pipe is connected to a mixing coal mill, and a mixing gate plate door is arranged in the middle of the mixing coal dropping pipe.
4. The multiple switching mechanism of claim 1, wherein the upper end of the helical feeding reamer is flush with the material charging opening of the material charging duct, and the lower discharge end of the helical feeding reamer is disposed above the material charging opening of the material charging duct.
5. The multiple switching and matching mechanism of double coal bunkers according to claim 1, wherein the matching conduit is a stainless steel tube with a large caliber and a smooth and wear-resistant inner wall, and a gap of 1-2cm is left between the outer edge of the spiral guide reamer and the inner wall of the matching conduit.
6. The multiple switching mechanism of a pair of coal bunkers according to claim 1, wherein said anti-blocking vibrator is disposed on the outer wall of the lower end of the dispensing opening of the dispensing conduit.
7. The multiple switching and blending mechanism of a double-bunker as claimed in claim 1, wherein the lower end of the second coal supply pipe is connected with the feed end of the coal feeder through a step-shaped discharge hole, and the caliber of the upper end feed port of the step-shaped discharge hole is smaller than that of the lower end discharge hole.
8. The multiple switching and mixing mechanism with double coal bunkers according to claim 1, wherein the feeding port of the mixing conduit is arranged at a position higher than that of the mixing port, and the inclination angle of the mixing conduit is set to be 50-80 °.
9. The multiple switching and blending mechanism of claim 1, wherein said blending conduit is provided with a plurality of openingsCO2And the safety inerting system is characterized in that a fault access hole is formed in the pipe wall of the ingredient guide pipe.
10. The mechanism of claim 1, wherein the driving motor is connected to a speed-adjusting steering receiver, the speed-adjusting steering receiver controls the start/stop, rotation direction and rotation speed of the driving motor, and the driving motor is a variable frequency driving motor.
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| CN202111296484.5A CN113996237A (en) | 2021-11-03 | 2021-11-03 | Various switching allotment mechanism in two coal bunkers |
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Application publication date: 20220201 |