CN109230390B

CN109230390B - Coal conveying mechanism for thermal power plant

Info

Publication number: CN109230390B
Application number: CN201810913578.4A
Authority: CN
Inventors: 白凤学; 杨秀兰; 梁丽行
Original assignee: Huang Suhuan
Current assignee: Xinjiang Mahatma Energy Co ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-09-22
Anticipated expiration: 2038-08-10
Also published as: CN109230390A

Abstract

The invention discloses a coal conveying mechanism for a thermal power plant, and belongs to the technical field of coal conveying equipment. Mainly comprises a steel bracket, a coal conveying device, a shelter and a power supply device; a plurality of belt supporting pieces are arranged in the steel support, and each belt supporting piece comprises an adjusting limiting block, a rotating rod, a supporting piece and an adjusting piece; the coal conveying device comprises a coal conveying belt, a supporting carrier roller and an inclined carrier roller, and the coal conveying belt is connected with the left side and the right side of the steel bracket through the supporting piece; the canopy is arranged at the upper end of the steel bracket. When the raw coal is transported, the drying device can dry moisture in the raw coal, can treat dust in the coal transporting process, has a simple structure, is convenient to operate, and is suitable for large-scale popularization.

Description

Coal conveying mechanism for thermal power plant

Technical Field

The invention relates to the technical field of coal conveying equipment, in particular to a coal conveying mechanism for a thermal power plant.

Background

A thermal power plant, referred to as a thermal power plant, is a plant that produces electric energy using a combustible (e.g., coal) as a fuel. The thermal power plant can generate and supply heat, the boiler capacity is larger than that of the thermal power plant on the same scale, the thermal power plant needs to be additionally provided with the boiler capacity for standby compared with the common thermal power plant, and the water treatment capacity is large. The basic production process of the thermal power plant is as follows: the fuel heats water to generate steam when burning, the chemical energy of the fuel is converted into heat energy, the steam pressure pushes the steam turbine to rotate, the heat energy is converted into mechanical energy, then the steam turbine drives the generator to rotate, the mechanical energy is converted into electric energy, and the main working principle of the thermal power plant is that hot water generated by a thermal power plant is utilized to heat after being reheated.

The fuel used by the thermal power plant is raw coal, the raw coal is conveyed to a coal bunker chamber of a boiler room from a flat ground by using a fuel conveying device, the height drop of a conveying belt is about dozens of meters frequently, the raw coal can be conveyed to the coal bunker chamber of the boiler after being transferred for several times, and the fuel conveying device mainly depends on a belt conveyor. The belt conveyer is a continuous conveyer with conveyer belt as traction and bearing part, the conveyer belt is passed around the driving drum and various direction-changing drums, and is tensioned by tension device, and under the drive of driving device, the conveyer belt is driven by the driving device to run by means of friction force and tension force between the drums and conveyer belt, so that the material can be continuously fed onto the conveyer belt and can be moved together with the conveyer belt, and the conveyer belt has the advantages of long conveying distance, large conveying capacity, small working resistance, convenient installation, low power consumption and less wear.

Utilize band conveyer at the in-process of transportation raw coal, because moisture in the raw coal can get into the furnace burning along with the boiler air supply, can restrict the exhaust gas temperature of boiler, reduce the utilization ratio of coal-fired, moisture in the coal still can shadow increase coal pulverizer power consumption, in addition, the power plant can produce a large amount of heat waste at the operation in-process, so collect the waste heat of discharging in the power plant operation and reduce the moisture in the raw coal and have important meaning to coal fired system. In addition, because the raw coal produces dust during transportation, which is harmful to the environment and personnel to some extent, it is necessary to reduce the dust in the air during transportation.

In view of the problems, the invention provides a coal conveying mechanism for a thermal power plant.

The technical scheme of the invention is as follows: a coal conveying mechanism for a thermal power plant mainly comprises a steel support, a coal conveying device, a shelter and a power supply device; the belt conveyor comprises a steel support, a belt conveying device and a coal drying device, wherein the steel support is provided with a plurality of belt supporting pieces, the belt supporting pieces are uniformly and symmetrically distributed on the left side and the right side in the steel support respectively, and the left side of the upper end of the steel support is provided with the raw coal drying; the coal conveying device comprises a coal conveying belt, a supporting roller and an inclined roller; the awning is of a herringbone structure and is arranged at the upper end of the steel bracket, and a dust removal device is arranged in the awning;

the belt supporting piece comprises an adjusting limiting block, a rotating rod, a supporting piece and an adjusting piece, wherein the adjusting limiting block is in a regular hexagon shape, a plurality of limiting holes are formed in the adjusting limiting block, the limiting holes are uniformly distributed along six edges of the adjusting limiting block respectively, a rotating hole is formed in the central position of the adjusting limiting block, a rotating shaft and a positioning clamping rod are arranged on the rotating rod, the rotating shaft can rotate in the rotating hole, the rotating rod is connected with the adjusting limiting block through the rotating hole and the rotating shaft, the positioning clamping rod is positioned on the rotating rod and corresponds to the limiting holes, the positioning clamping rod comprises a fixed rod and a moving rod, a sliding groove is formed in the fixed rod, a spring is arranged in the sliding groove, a pushing block is arranged on the moving rod, the spring is connected with the pushing block, the moving rod is connected with the fixed rod through the sliding groove and the positioning clamping rod, the supporting piece is arranged at one end of the rotating rod, which is far away from the center of the adjusting limiting block, and the adjusting piece is connected with the bottom end of the adjusting limiting block;

the raw coal drying device comprises an upper drying cavity, a lower drying cavity, inlet pipes and a coal outlet, wherein three heating plates are arranged in the upper drying cavity, the three heating plates are sequentially arranged in a cross and inclined mode from top to bottom, the upper ends of the three heating plates are respectively connected to the left side wall and the right side wall of the upper drying cavity, heating wires are arranged in the heating plates, the lower drying cavity is arranged at the lower end of the upper drying cavity, the two inlet pipes are symmetrically arranged on the two sides of the lower drying cavity respectively, and the coal outlet is arranged at the bottom end of the lower drying cavity;

the two ends of the coal conveying belt are respectively connected with the supporting pieces, a plurality of supporting rollers are arranged, the supporting rollers are uniformly arranged at the bottom end of the coal conveying belt, a plurality of inclined supporting rollers are arranged at the two sides of the coal conveying belt respectively and symmetrically, the supporting rollers and the inclined supporting rollers are arranged in parallel, and the inclined supporting rollers and the supporting pieces are arranged alternately;

the dust removal device comprises an adsorption tank, a filter tank, an air outlet pipe and an air inlet pipe, wherein activated carbon is arranged in the adsorption tank, a discharge hole is formed in the upper end of the adsorption tank, a discharge hole is formed in the bottom end of the adsorption tank, the filter tank is located in the adsorption tank, a filter layer is arranged on the periphery of the filter tank, the air outlet pipe is arranged at the upper end of the filter tank and extends to the outer side of the adsorption tank, the air inlet pipe is arranged at the bottom end of the outer side of the adsorption tank, an air suction fan and a driving motor are arranged on the air inlet pipe, and the driving motor; and the power supply device is connected with the driving motor and the heating wires.

Furthermore, the adjusting part comprises an adjusting frame, a lifting rod, a threaded pipe and a hand crank, wherein the upper end of the lifting rod is arranged in the adjusting frame, the lower end of the lifting rod is in threaded connection with the threaded pipe, and the threaded pipe is connected with the inner side of the steel support; be provided with first bevel gear, second bevel gear in the regulation frame, first bevel gear center and lifter fixed connection, second bevel gear is connected with first bevel gear meshing, hand handle is connected with second bevel gear central rotation, and the junction is provided with the mounting, conveniently adjusts the height of adjusting the stopper, increases the support effect of holding up of belt support spare, avoids raw coal unrestrained.

Further, the length of the lower end thread of the lifting rod is equal to that of the threaded pipe, and the lifting height of the lifting rod is limited, so that the height of the limiting block is controlled and adjusted better, and the supporting effect of the belt supporting piece is improved.

Further, a plurality of coal breakage channels are uniformly arranged in the lower drying cavity, and when coal passes through the coal breakage channels, the degree of drying of the coal is increased.

Furthermore, a plurality of layers of filter screens are arranged in the filter layer and are parallel to each other, and a plurality of inclined screens are uniformly distributed on one side of each layer of filter screen in parallel, so that air entering the filter box is filtered for many times, and dust in the air is reduced.

Furthermore, the window is arranged at the upper end of the shelter and made of transparent materials, the windows are symmetrically and uniformly distributed and are provided with the wipers, the windows can increase the brightness in the coal conveying mechanism, when raining, accumulated water on the windows is swept by the wipers, and the influence of rainwater weather on the brightness in the coal conveying mechanism is avoided.

The working principle of the invention is as follows: before raw coal is transported, the raw coal passes through an upper drying cavity of a raw coal drying device, water in the raw coal is primarily dried by using three heating plates, then the raw coal slides to a coal breakage channel of a lower drying cavity from the heating plates, and collected waste heat is introduced from an introducing pipe to further dry the coal in the coal breakage channel; when carrying out the raw coal transportation, the raw coal after the drying falls to the coal conveying belt from the coal outlet, utilize the support bearing roller, oblique bearing roller supports the coal conveying belt, utilize the locator card pole to adjust the angle of holding up the support piece on adjusting the stopper joint, thereby hold up the support to the coal conveying belt, utilize the drain hole on the adsorption tank to put into active carbon in the adsorption tank, utilize active carbon to adsorb the dust that produces in the transportation, the active carbon after adsorbing is discharged from the discharge gate, the air after adsorbing filters through the filter layer, emit into the atmosphere from the outlet duct.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a coal conveying and conveying mechanism for a thermal power plant, which is characterized in that a raw coal drying device is used for drying raw coal before the raw coal is conveyed, so that the moisture in the raw coal is reduced, and the utilization rate of fire coal is increased; when raw coal is transported, the dust content generated in the transportation process is reduced by the dust removal device, the harm to the environment and personnel is reduced, and the brightness in the coal transporting and conveying mechanism is increased by the window.

Drawings

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

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic view of the construction of the belt support of the present invention;

FIG. 4 is a schematic structural view of the connection relationship between the adjusting stopper and the rotating rod according to the present invention;

FIG. 5 is a schematic view of the detent lever spring of the present invention in an uncompressed configuration;

FIG. 6 is a schematic view of the detent lever spring of the present invention in a compressed configuration;

FIG. 7 is a schematic view showing the internal structure of the drying apparatus of the present invention;

FIG. 8 is a schematic view showing the internal structure of the dust removing device of the present invention;

FIG. 9 is a top plan view of the shelter of the present invention;

FIG. 10 is a schematic diagram of the mechanism of the filter layer of the present invention;

wherein, 1-steel bracket, 10-belt supporting piece, 100-adjusting limiting block, 101-rotating rod, 1010-rotating shaft, 1011-positioning clamping rod, 102-supporting piece, 103-adjusting frame, 1031-first bevel gear, 1032-second bevel gear, 104-lifting rod, 105-threaded pipe, 106-hand crank, 11-raw coal drying device, 110-upper drying cavity, 1100-heating plate, 111-lower drying cavity, 112-introducing pipe, 113-coal outlet, 2-coal conveying device, 20-coal conveying belt, 21-supporting roller, 22-inclined roller, 3-canopy, 30-dust removing device, 300-adsorption box, 301-filter box, 3010-filter layer, 302-air outlet pipe, 303-air inlet pipe, 3030-suction fan, 3031-driving motor, 31-window, 32-wiper, 4-power supply device, 5-pushing block, 6-spring, 7-moving rod and 8-filter screen.

Detailed Description

Example (b): as shown in fig. 1 and 2, the coal conveying mechanism for the thermal power plant mainly comprises a steel support 1, a coal conveying device 2, a shelter 3 and a power supply device 4; the steel support 1 is provided with a plurality of belt supporting pieces 10, the belt supporting pieces 10 are respectively and uniformly and symmetrically distributed on the left side and the right side in the steel support 1, and the left side of the upper end of the steel support 1 is provided with a raw coal drying device 11; the coal conveying device 2 comprises a coal conveying belt 20, a supporting carrier roller 21 and an inclined carrier roller 22; the canopy 3 is of a herringbone structure, the canopy 3 is arranged at the upper end of the steel support 1, the dust removal device 30 is arranged in the canopy 3, as shown in fig. 9, a window 31 is arranged at the upper end of the canopy 3, the window 31 is made of transparent materials, a plurality of windows 31 are arranged, the windows 1 are respectively symmetrically and uniformly distributed, a windshield wiper 32 is arranged on each window 31, the window 31 can increase the brightness in the coal conveying mechanism, when raining, accumulated water on the window can be swept away by the windshield wipers 32, and the influence of rainwater weather on the brightness in the coal conveying mechanism is avoided;

as shown in figures 3 and 4, the belt supporting piece 10 comprises an adjusting limiting block 100, a rotating rod 101, a supporting piece 102 and an adjusting piece, wherein the adjusting limiting block 100 is a regular hexagon, 12 limiting holes are formed in the adjusting limiting block 100, the 12 limiting holes are uniformly distributed along six sides of the adjusting limiting block 100 respectively, a rotating hole is formed in the center position of the adjusting limiting block 100, a rotating shaft 1010 and a positioning clamping rod 1011 are arranged on the rotating rod 101, the rotating shaft 1010 can rotate in the rotating hole, the rotating rod 101 is connected with the adjusting limiting block 100 through the rotating hole and the rotating shaft 1010, the positioning clamping rod 1011 is positioned on the rotating rod 101 and corresponds to the limiting hole, as shown in figures 5 and 6, the positioning clamping rod 1011 comprises a fixed rod and a moving rod 7, a sliding groove is formed in the fixed rod, a spring 6 is arranged in the sliding groove, a pushing block 5 is arranged on the moving rod 7, the spring 6 is, The pushing block 5 is connected, the positioning clamp rod 1011 is clamped with the limiting hole through the moving rod 7, the supporting part 102 is arranged at one end of the rotating rod 101, which is far away from the center of the adjusting limiting block 100, the adjusting part is connected with the bottom end of the adjusting limiting block 100, as shown in fig. 3, the adjusting part comprises an adjusting frame 103, a lifting rod 104, a threaded pipe 105 and a hand crank 106, the upper end of the lifting rod 104 is arranged in the adjusting frame 103, the lower end of the lifting rod 104 is in threaded connection with the threaded pipe 105, and the threaded pipe 105 is connected with the inner side of the steel support; a first bevel gear 1031 and a second bevel gear 1032 are arranged in the adjusting frame 103, the center of the first bevel gear 1031 is fixedly connected with the lifting rod 104, the second bevel gear 1032 is meshed with the first bevel gear 1031, the crank handle 106 is rotatably connected with the center of the second bevel gear 1032, and a fixing piece is arranged at the joint, so that the height of the adjusting limit block 100 can be conveniently adjusted, the supporting effect of the belt supporting piece 10 is increased, and raw coal is prevented from being scattered; the length of the lower end thread of the lifting rod 104 is equal to the length of the threaded pipe 105, and the lifting height of the lifting rod 104 is limited, so that the height of the limiting block 100 is controlled and adjusted better, and the supporting effect of the belt supporting piece 10 is increased.

As shown in fig. 7, the raw coal drying device 11 includes an upper drying chamber 110, a lower drying chamber 111, an inlet pipe 112, and a coal outlet 113, wherein three heating plates 1100 are provided in the upper drying chamber 110, the three heating plates 1100 are respectively arranged in a sequentially crossing and inclined manner from top to bottom, the upper ends of the three heating plates 1100 are respectively connected to the left and right side walls of the upper drying chamber 110, heating wires are provided in the heating plates 1100, the lower drying chamber 111 is provided at the lower end of the upper drying chamber 110, a plurality of coal dropping passages are uniformly provided in the lower drying chamber 111, and when coal passes through the coal dropping passages, the degree of drying of the coal is increased; the number of the introducing pipes 112 is two, the two introducing pipes 112 are respectively and symmetrically arranged at two sides of the lower drying cavity 111, and the coal outlet 113 is arranged at the bottom end of the lower drying cavity 111;

as shown in fig. 2, two ends of the coal conveying belt 20 are respectively connected with the supporting parts 102, a plurality of supporting rollers 21 are provided, a plurality of supporting rollers 21 are uniformly arranged at the bottom end of the coal conveying belt 20, a plurality of inclined rollers 22 are provided, a plurality of inclined rollers 22 are respectively symmetrically arranged at two sides of the coal conveying belt 20, the supporting rollers 21 and the inclined rollers 22 are arranged in parallel, and the inclined rollers 22 and the supporting parts 102 are alternately arranged;

as shown in fig. 8, the dust removing device 30 includes an adsorption tank 300, a filter tank 301, an air outlet pipe 302, and an air inlet pipe 303, wherein activated carbon is arranged in the adsorption tank 300, a discharge hole is arranged at the upper end of the adsorption tank 300, a discharge hole is arranged at the bottom end of the adsorption tank 300, the filter tank 301 is located inside the adsorption tank 300, and a filter layer 3010 is arranged on the periphery of the filter tank 301, as shown in fig. 10, 5 layers of filter screens 8 are arranged in the filter layer 3010, the 5 layers of filter screens 8 are parallel to each other, and a plurality of inclined nets are uniformly distributed in parallel on one side of each layer of filter screen 8, so as to filter the air entering the; the air outlet pipe 302 is arranged at the upper end of the filter tank 301 and extends to the outer side of the adsorption tank 300, the air inlet pipe 303 is arranged at the bottom end of the outer side of the adsorption tank 300, the air inlet pipe 303 is provided with an air suction fan 3030 and a driving motor 3031, and the driving motor 3031 is connected with the air suction fan 3030 and provides power for the air suction fan 3030; the power supply device 4 is connected to the drive motor 3031 and the heater wire.

Before raw coal is transported, water in the raw coal is primarily dried by the three heating plates 401 through the upper drying cavity 40 of the raw coal drying device 4, then the raw coal slides from the heating plates 401 to the coal dropping hole of the lower drying cavity 41, and collected waste heat is introduced from the introducing pipe 42 to further dry the coal in the coal dropping hole; when raw coal is transported, the dried raw coal falls onto the coal conveying belt 20 from the coal outlet 43, the coal conveying belt 20 is supported by the supporting carrier roller 21 and the inclined carrier roller 22, the angle of the supporting piece 102 is adjusted by clamping the positioning clamping rod 1011 on the adjusting limiting block 100, so that the coal conveying belt is supported, activated carbon is put into the adsorption box 300 by the discharge port on the adsorption box 300, dust generated in the transportation process is adsorbed by the activated carbon, the adsorbed activated carbon is discharged from the discharge port, and the adsorbed air is filtered by the filter layer 3010 and then discharged into the atmosphere from the air outlet pipe 302.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A fortune coal transport mechanism for steam power plant which characterized in that: mainly comprises a steel support (1), a coal conveying device (2), a shelter (3) and a power supply device (4); a plurality of belt supporting pieces (10) are arranged on the steel support (1), the belt supporting pieces (10) are respectively and uniformly and symmetrically distributed on the left side and the right side in the steel support (1), and a raw coal drying device (11) is arranged on the left side of the upper end of the steel support (1); the coal conveying device (2) comprises a coal conveying belt (20), a supporting carrier roller (21) and an inclined carrier roller (22); the awning (3) is of a herringbone structure, the awning (3) is arranged at the upper end of the steel support (1), and a dust removal device (30) is arranged in the awning (3);

the belt supporting piece (10) comprises an adjusting limiting block (100), a rotating rod (101), a supporting piece (102) and an adjusting piece, wherein the adjusting limiting block (100) is a regular hexagon, a plurality of limiting holes are formed in the adjusting limiting block (100), the limiting holes are uniformly distributed along six sides of the adjusting limiting block (100), a rotating hole is formed in the center position of the adjusting limiting block (100), a rotating shaft (1010) and a positioning clamping rod (1011) are arranged on the rotating rod (101), the rotating shaft (1010) can rotate in the rotating hole, the rotating rod (101) is connected with the adjusting limiting block (100) through the rotating hole and the rotating shaft (1010), the positioning clamping rod (1011) is located at a position on the rotating rod (101) corresponding to the limiting holes, the positioning clamping rod (1011) comprises a fixed rod and a moving rod (7), a sliding groove is formed in the fixed rod, and a spring (6) is arranged in the sliding groove, a pushing block (5) is arranged on the moving rod (7), the spring (6) is connected with the pushing block (5), the moving rod (7) is connected with the fixed rod through a sliding groove and the pushing block (5), the positioning clamping rod (1011) is clamped with the limiting hole through the moving rod (7), the supporting piece (102) is arranged at one end, far away from the center of the adjusting limiting block (100), of the rotating rod (101), and the adjusting piece is connected with the bottom end of the adjusting limiting block (100);

the raw coal drying device (11) comprises an upper drying cavity (110), a lower drying cavity (111), three inlet pipes (112) and a coal outlet (113), wherein heating plates (1100) are arranged in the upper drying cavity (110), the three heating plates (1100) are sequentially arranged in a cross and inclined mode from top to bottom, the upper ends of the three heating plates (1100) are respectively connected to the left side wall and the right side wall of the upper drying cavity (110), heating wires are arranged in the heating plates (1100), the lower drying cavity (111) is arranged at the lower end of the upper drying cavity (110), the number of the inlet pipes (112) is two, the two inlet pipes (112) are respectively and symmetrically arranged on two sides of the lower drying cavity (111), and the coal outlet (113) is arranged at the bottom end of the lower drying cavity (111);

the two ends of the coal conveying belt (20) are respectively connected with the supporting pieces (102), a plurality of supporting rollers (21) are arranged, the supporting rollers (21) are uniformly arranged at the bottom end of the coal conveying belt (20), a plurality of inclined supporting rollers (22) are arranged, the inclined supporting rollers (22) are respectively and symmetrically arranged at two sides of the coal conveying belt (20), the supporting rollers (21) and the inclined supporting rollers (22) are arranged in parallel, and the inclined supporting rollers (22) and the supporting pieces (102) are alternately arranged;

the dust removal device (30) comprises an adsorption tank (300), a filter tank (301), an air outlet pipe (302) and an air inlet pipe (303), wherein activated carbon is arranged in the adsorption tank (300), a discharge hole is formed in the upper end of the adsorption tank (300), a discharge hole is formed in the bottom end of the adsorption tank (300), the filter tank (301) is located inside the adsorption tank (300), a filter layer (3010) is arranged on the periphery of the filter tank (301), the air outlet pipe (302) is arranged at the upper end of the filter tank (301) and extends to the outer side of the adsorption tank (300), the air inlet pipe (303) is arranged at the bottom end of the outer side of the adsorption tank (300), an air suction fan (3030) and a driving motor (3031) are arranged on the air inlet pipe (303), and the driving motor (3031) is connected with the air suction fan (3030); the power supply device (4) is connected with the driving motor (3031) and the heating wire.

2. The coal conveying mechanism for the thermal power plant is characterized in that the adjusting piece comprises an adjusting frame (103), a lifting rod (104), a threaded pipe (105) and a hand crank (106), the upper end of the lifting rod (104) is arranged in the adjusting frame (103), the lower end of the lifting rod (104) is in threaded connection with the threaded pipe (105), and the threaded pipe (105) is connected with the inner side of the steel support (1); be provided with first bevel gear (1031), second bevel gear (1032) in adjust frame (103), first bevel gear (1031) center and lifter (104) fixed connection, second bevel gear (1032) and first bevel gear (1031) meshing are connected, hand crank (106) are connected with second bevel gear (1032) center rotation, and the junction is provided with the mounting.

3. The coal conveying mechanism for the thermal power plant as claimed in claim 2, characterized in that the length of the lower end thread of the lifting rod (104) is equal to the length of the threaded pipe (105).

4. The coal conveying mechanism for the thermal power plant is characterized in that a plurality of coal dropping channels are uniformly arranged in the lower drying cavity (111).

5. The coal conveying mechanism for the thermal power plant as claimed in claim 1, wherein multiple layers of filter screens (8) are arranged in the filter layer (3010), the multiple layers of filter screens (8) are parallel to each other, and a plurality of inclined screens are uniformly distributed on one side of each layer of filter screen (8) in parallel.