CN218154300U

CN218154300U - Coal blending and blending combustion device for thermal power plant

Info

Publication number: CN218154300U
Application number: CN202222789586.7U
Authority: CN
Inventors: 甄成刚; 孙晗旭
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2022-12-27
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to a coal blending and blending combustion device of thermal power plant, including casing and inside combustion chamber and heat recovery mechanism, the casing top is provided with purifying box and inside clarifier and the pipe of discharging fume of inside, and heat recovery mechanism includes the backup pad of combustion chamber top, and the backup pad top is fixed with two flue pipes, and the intraductal fixed mounting of flue has first heat pipe, and first heat pipe has a set of heat exchanger through heat conduction ring and second heat union coupling. This device is burnt in blending coal of thermal power plant, through installing first heat pipe in the flue pipe, retrieve the heat that coal ash produced in the flue pipe, advance the transmission to heat energy through the cooperation of second heat pipe and heat exchanger, make heat energy resource reuse, reduced the waste of heat resource in the coal ash of thermal power plant, promoted thermal power plant's economic benefits.

Description

Coal blending and blending combustion device for thermal power plant

Technical Field

The utility model relates to a thermal power plant joins in marriage coal technical field specifically is a thermal power plant joins in marriage coal and mixes burning device.

Background

The coal blending technology is characterized in that different coal types are blended according to a certain proportion according to a certain principle before pulverized coal enters a hearth to form blended coal combustion, so that important coal quality parameters such as calorific value, volatile components, sulfur components and the like of coal as fired can be effectively controlled, the requirements of constraint conditions such as boiler load, slagging, emission and the like are met, and the economical efficiency and the safety of the operation of a boiler of a power plant are ensured.

Although most of thermal power plants adopt a coal blending combustion technology at present, the advantages of coal quality of each kind of coal are fully exerted, the boiler efficiency is improved as much as possible, the coal consumption is reduced, and the purposes of energy conservation and emission reduction are achieved. However, for a large amount of coal ash generated during the combustion of pulverized coal, power plants are usually cleaned by wet and dry discharging methods and then collected for reuse. The coal ash discharged by the power plant has higher temperature and heat after being combusted, so that the coal ash is directly purified, the temperature and the heat of the coal ash are wasted, and the waste of resources and economic loss is great for the power plant.

Therefore, in order to solve the problem of waste of heat resources in the coal ash discharged by the power plant at present, a coal blending and co-combustion device of the thermal power plant is provided.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a device is mixed to thermal power plant's blending coal possesses advantages such as the utilization ratio that improves the resource, a large amount of coal ashes that appear when having solved the burning of thermal power plant's blending coal, and direct purification treatment can cause the problem of heat wasting of resources.

In order to achieve the above object, the utility model provides a following technical scheme: a coal blending combustion device of a thermal power plant comprises a shell, a combustion chamber and a heat recovery mechanism, wherein the combustion chamber and the heat recovery mechanism are arranged in the shell;

the heat recovery mechanism comprises a supporting plate fixedly mounted on the inner wall of the shell, the combustion chamber is located below the supporting plate, two flue pipes are fixedly mounted at the top of the supporting plate, the bottoms of the two flue pipes penetrate through the supporting plate and are communicated with the interior of the combustion chamber, the tops of the two flue pipes are fixedly connected with the inner wall of the top of the shell, fixing rings are fixedly mounted at the two ends of each flue pipe respectively, a first heat pipe is fixedly mounted in the middle of the two fixing rings in each flue pipe, heat conducting rings are fixedly mounted at the two ends of each first heat pipe respectively, a second heat pipe is fixedly mounted at the periphery of each heat conducting ring, the four second heat pipes on the two heat conducting rings penetrate through the side wall of each flue pipe respectively and are connected with a group of heat exchangers together, the outer sides of the flue pipes are fixedly mounted with fixing sleeves arranged in parallel respectively, the inner parts of the fixing sleeves are rotatably connected with lead screws in a rotating mode, one ends of the heat conducting pipes are fixedly connected with driving motors, the peripheries of the lead screws are in threaded connection with moving blocks, one side of the moving blocks are fixedly connected with lantern rings through connecting rods, the annular inner parts of the cleaning rings are coaxially and are connected with the first heat conducting pipes, the first pipe sleeves are connected with the purification box, the top of the purification box, and the top of the purification box are arranged on the side walls of the flue pipes, and the purification box.

Furthermore, the fixing ring is hollowed or latticed, so that smoke such as coal ash generated by combustion can conveniently pass through the flue pipe.

Furthermore, be provided with the clearance between the lantern ring and the clearance ring, just a plurality of connecting blocks of fixedly connected with between the lantern ring and the clearance ring, a plurality of connecting blocks are followed the circumferencial direction equipartition of the lantern ring sets up.

Furthermore, the lantern ring and the cleaning ring are located between the two heat conduction rings on the first heat conduction pipe sleeved with the lantern ring, the moving range of the lantern ring is limited between the two heat conduction rings at the top and the bottom, the inner diameter of the cleaning ring is larger than the outer diameter of the first heat conduction pipe, and the gap between the annular inner wall of the cleaning ring and the outer wall of the first heat conduction pipe is smaller than or equal to 1mm.

Furthermore, the connecting rod both sides between the movable block and the lantern ring are fixedly connected with the shutoff strip respectively, the shutoff strip outside still slides and has cup jointed the extension strip, extension strip sliding connection with inside the lateral wall of flue pipe.

Furthermore, the position of having seted up the spout on the flue pipe lateral wall in the hole has been seted up on the lateral wall at spout both ends, the hole with the cross-sectional dimension phase-match of extension strip, extend the strip with hole sliding connection, the extension strip is the cavity board, the cross-sectional dimension of the inside cavity position of extension strip with the cross-sectional dimension phase-match of shutoff strip, just the shutoff strip with the inner wall sliding connection of extension strip.

Further, the width dimension of the blocking strip and the extension strip is the same as that of the sliding groove on the side wall of the flue pipe.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

this coal blending of thermal power plant mixes device that burns, and the power plant boiler inner furnace's among the prior art function is similar, has improved on the function basis of ordinary furnace and inner structure thereof. The utility model discloses an install first heat pipe in the flue pipe, retrieve the heat that coal ash produced in the flue pipe, advance the transmission to heat energy through the cooperation of second heat pipe and heat exchanger, make heat energy resource reuse, reduced the waste of heat energy resource in the coal ash of thermal power plant, promoted thermal power plant's economic benefits. Additionally, the utility model discloses an extension strip and blocking strip prevent that coal ash from getting into fixed sleeving's inside from leading to the fact certain influence to the lead screw, and the cooperation through clearance ring and lead screw will be attached the coal ash on first heat pipe and clear up, have strengthened the heat-sinking capability of first heat pipe, have improved the utilization ratio of resource.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the connection structure between the collar and the cleaning ring in the drawing of the present invention.

In the figure: 1. a housing; 2. a combustion chamber; 3. a purification box; 4. a purifier; 5. a smoke exhaust pipe; 6. a heat recovery mechanism; 601. a support plate; 602. a flue pipe; 603. a fixing ring; 604. a first heat conductive pipe; 605. a heat conducting ring; 606. a second heat conductive pipe; 607. a heat exchanger; 608. fixing the sleeve; 609. a screw rod; 610. a moving block; 611. a collar; 612. connecting blocks; 613. cleaning a ring; 614. an extension bar; 615. a plugging strip; 616. a smoke conveying pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the coal blending and co-combustion device of the thermal power plant in the embodiment includes a casing 1, a combustion chamber 2 and a heat recovery mechanism 6 inside the casing 1, a purification box 3 is disposed on the top of the casing 1, and a purifier 4 and a smoke exhaust pipe 5 are disposed in the purification box 3. In this embodiment, the outer wall of the right side of the combustion chamber 2 is provided with a coal inlet.

Heat recovery mechanism 6 includes backup pad 601 of fixed mounting on casing 1 inner wall, combustion chamber 2 is located backup pad 601 below, two flue pipe 602 of top fixed mounting of backup pad 601, backup pad 601 is run through to the bottom of two flue pipe 602, and be linked together with combustion chamber 2 is inside, the top of two flue pipe 602 and casing 1's top inner wall fixed connection, in flue pipe 602, in its both ends respectively fixed mounting have solid fixed ring 603, gu fixed ring 603 is fretwork or latticed, flue gas such as the coal ash of being convenient for the burning production passes through from the flue pipe.

A first heat conduction pipe 604 is fixedly mounted between the two fixing rings 603 in each flue pipe 602, heat conduction rings 605 are fixedly mounted at the two ends of the first heat conduction pipe 604 respectively, second heat conduction pipes 606 are fixedly mounted on the peripheries of the heat conduction rings 605, and the four second heat conduction pipes 606 on the two heat conduction rings 605 penetrate through the side wall of the flue pipe 602 respectively and are connected with a group of heat exchangers 607 together. The heat exchanger 607 in this embodiment is fixedly connected with a heat energy transmission pipe for transmitting heat energy for use.

The outer side of each flue pipe 602 is fixedly provided with a fixed sleeve 608 arranged in parallel, the inside of the fixed sleeve 608 is rotatably connected with a screw 609, one end of the screw 609 is fixedly connected with a driving motor, and the screw 609 is driven by the motor to rotate. The outer periphery of the lead screw 609 is connected with a moving block 610 in a threaded manner, one side of the moving block 610 is fixedly connected with a lantern ring 611 through a connecting rod, a cleaning ring 613 is coaxially and fixedly connected inside the annular shape of the lantern ring 611, and the cleaning ring 613 is sleeved outside the first heat conduction pipe 604 on the same side. The lead screw 609 can drive the moving block 610 and the sleeve ring 611 to move synchronously, and the coal ash adsorbed on the first heat conducting pipe 604 is cleaned through the matching of the sleeve ring 611 and the cleaning ring 613, so that the heat absorptivity of the first heat conducting pipe 604 is ensured.

In this embodiment, a gap is formed between the collar 611 and the cleaning ring 613, a plurality of connecting blocks 612 are fixedly connected between the collar 611 and the cleaning ring 613, and the connecting blocks 612 are uniformly arranged along the circumferential direction of the collar 611. In this embodiment, four connecting blocks 612 are connected between the collar 611 and the cleaning ring 613. The lantern ring 611 and the cleaning ring 613 are located between the two heat-conducting rings 605 on the first heat-conducting pipe 604 sleeved with the lantern ring 611, the moving range of the lantern ring 611 is limited between the two heat-conducting rings 605 at the top and the bottom, the inner diameter of the cleaning ring 613 is larger than the outer diameter of the first heat-conducting pipe 604, and the gap between the annular inner wall of the cleaning ring 613 and the outer wall of the first heat-conducting pipe 604 is less than or equal to 1mm.

The side walls of the flue pipe 602 adjacent to the fixing sleeve 608 are provided with sliding grooves for the connecting rods to pass through. Two sides of the connecting rod between the moving block 610 and the lantern ring 611 are respectively and fixedly connected with a blocking strip 615, the outer part of the blocking strip 615 is further sleeved with an extending strip 14 in a sliding mode, and the extending strip 614 is connected with the inner portion of the side wall of the flue pipe 602 in a sliding mode. The flue pipe 602 has a chute formed in the sidewall thereof, and inner holes formed in the sidewalls at both ends of the chute, wherein the inner holes are matched with the cross-sectional dimension of the extension strips 614, and the extension strips 614 are slidably connected to the inner holes. The extension bar 614 is a hollow plate, the cross-sectional dimension of the hollow position inside the extension bar 614 is matched with the cross-sectional dimension of the blocking bar 615, and the blocking bar 615 is connected with the inner wall of the extension bar 614 in a sliding manner.

In this embodiment, the blocking strip 615 and the extension strip 614 are the same width as the chute in the sidewall of the flue tube 602. The blocking strip 615 is only a sliding connection inside the extension strip 614, and the blocking strip 615 can move outside the extension strip 614.

In this embodiment, the extension bar 614, the blocking bar 615, the moving block 610 and the fixing ring 603 are made of heat-resistant material.

The top of the flue pipe 602 is further provided with a smoke-transporting pipe 616, and the smoke-transporting pipe 616 penetrates the top of the housing 1 and the bottom of the purification box 3 and communicates the flue pipe 602 and the purifier 4. In this embodiment, the top of the smoke delivery pipe 616 is fixedly connected to the outer wall of the bottom of the purifier 4, and the coal ash after absorbing heat is treated by the purifier 4 and then discharged through the smoke discharge pipe 5, thereby reducing the pollution to air.

The working principle of the above embodiment is as follows:

this coal blending co-combustion device of thermal power plant, the function with the internal structure of power plant's boiler in prior art is similar, has improved on the function basis of ordinary furnace and internal structure, has increased the heat recovery mechanism 6 that utilizes heat in the coal ash. When the blended coal is combusted, the coal ash is discharged into the flue pipe 602, at this time, the heat released by the coal ash is recovered through the first heat conduction pipe 604, and the heat energy is transmitted through the cooperation of the heat conduction ring 605, the second heat conduction pipe 606 and the heat exchanger 607. In addition, when the amount of coal ash attached to the outer wall of the first heat pipe 604 is large, the moving block 610 is driven by the lead screw 609 to move up and down, the cleaning ring 613 is driven by the moving block 610, the sleeve ring 611 and the connecting block 612 to move synchronously, so that the coal ash on the outer wall of the first heat pipe 604 is cleaned, and the cleaned coal ash is discharged into the purifier 4 through the upward hot air flow in the flue pipe 602 and then discharged through the smoke exhaust pipe 5.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a thermal power plant joins in marriage coal and mixes burning device which characterized in that: the device comprises a shell (1), a combustion chamber (2) and a heat recovery mechanism (6) which are arranged in the shell, wherein a purification box (3) is arranged at the top of the shell (1), and a purifier (4) and a smoke exhaust pipe (5) are arranged in the purification box (3);

the heat recovery mechanism (6) comprises a support plate (601) fixedly mounted on the inner wall of the shell (1), the combustion chamber (2) is located below the support plate (601), two flue pipes (602) are fixedly mounted at the top of the support plate (601), the bottoms of the two flue pipes (602) penetrate through the support plate (601) and are communicated with the interior of the combustion chamber (2), the tops of the two flue pipes (602) are fixedly connected with the inner wall of the top of the shell (1), fixing rings (603) are respectively fixedly mounted at the two ends of the flue pipes (602) in the flue pipes, a first heat pipe (604) is fixedly mounted between the two fixing rings (603) in each flue pipe (602), heat conduction rings (605) are respectively and fixedly mounted at the two ends of the first heat pipe (604), second heat pipes (606) are respectively and fixedly mounted at the periphery of the heat conduction rings (605), four second heat pipes (606) on the two heat conduction rings (605) penetrate through the side wall of the flue pipes (602) and are connected with a group of heat conduction rings (607) together, a screw mandrel (609) is fixedly mounted at the outer side of each flue pipe (602), a screw rod (609) is connected with a motor (608) fixedly mounted at the outer side of the heat exchanger (610), one side of the moving block (610) is fixedly connected with a sleeve ring (611) through a connecting rod, a cleaning ring (613) is coaxially and fixedly connected with the inside of the ring of the sleeve ring (611), the cleaning ring (613) is sleeved outside a first heat-conducting pipe (604) on the same side, a sliding groove for the connecting rod to pass through is formed in the side wall of the flue pipe (602) adjacent to the fixing sleeve (608), a smoke conveying pipe (616) is further arranged at the top of the flue pipe (602), and the smoke conveying pipe (616) penetrates through the top of the shell (1) and the bottom of the purification box (3) and is communicated with the flue pipe (602) and the purifier (4).

2. The thermal power plant coal blending co-combustion device as claimed in claim 1, wherein: the fixing ring (603) is hollow or latticed.

3. The coal blending and co-combustion device of the thermal power plant as claimed in claim 1, wherein: a gap is formed between the lantern ring (611) and the cleaning ring (613), a plurality of connecting blocks (612) are fixedly connected between the lantern ring (611) and the cleaning ring (613), and the connecting blocks (612) are uniformly distributed along the circumferential direction of the lantern ring (611).

4. The coal blending and co-combustion device of the thermal power plant as claimed in claim 1, wherein: the lantern ring (611) and the cleaning ring (613) are positioned between the two heat conducting rings (605) on the first heat conducting pipe (604) sleeved with the lantern ring (611), the inner diameter of the cleaning ring (613) is larger than the outer diameter of the first heat conducting pipe (604), and the gap between the annular inner wall of the cleaning ring (613) and the outer wall of the first heat conducting pipe (604) is less than or equal to 1mm.

5. The coal blending and co-combustion device of the thermal power plant as claimed in claim 1, wherein: the two sides of the connecting rod between the moving block (610) and the lantern ring (611) are respectively and fixedly connected with a blocking strip (615), the outside of the blocking strip (615) is further sleeved with an extending strip (614) in a sliding mode, and the extending strip (614) is connected with the inside of the side wall of the flue pipe (602) in a sliding mode.

6. The coal blending and co-combustion device of the thermal power plant as claimed in claim 5, wherein: the position of having seted up the spout on flue pipe (602) lateral wall, in the hole has been seted up on the lateral wall at spout both ends, the hole with the cross sectional dimension phase-match of extending strip (614), extend strip (614) with hole sliding connection, it is the cavity board to extend strip (614), extend the cross sectional dimension of the inside cavity position of strip (614) with the cross sectional dimension phase-match of shutoff strip (615), just shutoff strip (615) with the inner wall sliding connection of extending strip (614).

7. The coal blending and blending device of the thermal power plant as claimed in claim 6, wherein: the blocking strip (615) and the extension strip (614) are the same as the width dimension of the chute on the side wall of the flue pipe (602).