CN107300189B

CN107300189B - Coal burning equipment

Info

Publication number: CN107300189B
Application number: CN201710614485.7A
Authority: CN
Inventors: 沈伟军; 沈智慧; 陈欢; 施红华
Original assignee: Zhejiang Zheneng Shaoxing Binhai Thermal Power Co ltd
Current assignee: Zhejiang Zheneng Shaoxing Binhai Thermal Power Co ltd
Priority date: 2017-07-25
Filing date: 2017-07-25
Publication date: 2023-07-04
Anticipated expiration: 2037-07-25
Also published as: CN107300189A

Abstract

The invention discloses coal-fired combustion equipment, which comprises a boiler, a denitration device and a water supply device, wherein the boiler is connected with the denitration device, an economizer is arranged in the boiler, the economizer is communicated with the denitration device, the water supply device comprises a water inlet pipe, the denitration device comprises a catalyst, the water inlet pipe comprises a first water inlet section and a second water inlet section, one end of the first water inlet section is communicated with a water tank, the other end of the first water inlet section is communicated with the boiler, one end of the second water inlet section is communicated with the middle part of the first water inlet section, and the other end of the second water inlet section is communicated with the denitration device, so that the aim of improving the reaction efficiency is fulfilled.

Description

Coal burning equipment

Technical Field

The present invention relates to a thermal power plant, and more particularly to a coal burning plant.

Background

The coal-fired boiler is a boiler with fuel coal, and is a thermal energy power device for heating heat medium water or other organic heat carriers (such as heat conducting oil and the like) to a certain temperature (or pressure) by burning the fuel coal in a hearth to release heat.

After combustion of the coal in the boiler, a large amount of soot is generated. For environmental protection, these soot needs to be introduced into a denitration device. And adopting a Selective Catalytic Reduction (SCR) denitration device to denitration the soot. Since the boiler generates a large amount of heat during operation, the boiler needs to be cooled through the water inlet pipe, and water becomes steam when passing through the boiler and is then injected into the denitration device for cooling.

However, when the boiler is operated under high load, the flue gas temperature of the boiler is low because the coal is not fully combusted, and when the soot enters the denitration device, the reaction efficiency of the catalyst in the denitration device with the soot is low.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide coal burning equipment, which achieves the purpose of improving the reaction efficiency by dividing a water inlet pipe into a first water inlet section and a second water inlet section.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a coal-fired combustion apparatus, includes boiler, denitrification facility and water supply installation, boiler and denitrification facility be connected, the boiler in install the economizer, economizer and denitrification facility intercommunication, water supply installation include the water inlet pipe, denitrification facility include the catalyst, the water inlet pipe include first water section and second water section of intaking, first water section one end and water tank intercommunication other end and boiler intercommunication, the one end and the middle part intercommunication of first water section of intaking of second water section, the other end and denitrification facility intercommunication.

Through adopting above-mentioned technical scheme, pour into first water section and second and go into in the water section, the water yield of first water section in is less than the water yield of going into the water pipe, the degree of cooling to the boiler has been reduced, thereby can promote the temperature of boiler, make the burning of the fire coal in the boiler more abundant, can have higher temperature when the soot enters into denitrification facility, make the catalyst have higher reaction efficiency under this temperature, the vapor in the first water section and the water injection in the second water section are in denitrification facility, under vapor, the effect of catalyst, have higher reaction efficiency when the soot denitration, realize the denitration of soot.

The invention is further provided with: the water supply device also comprises a plurality of valves, the valves are respectively arranged on the first water inlet section and the second water inlet section, and the valve arranged on the first water inlet section is positioned at one end of the first water inlet section far away from the boiler.

Through adopting above-mentioned technical scheme, the setting of valve can control the break-make of second income water section and first income water section at any time, and the boiler of easy access, simultaneously, also can be convenient for adjust the flow of water.

The invention is further provided with: the valve comprises a valve body, a valve rod, a first valve clack, a second valve clack and a driving mechanism, wherein the driving mechanism comprises a driving rod and a transmission assembly, the first valve clack and the second valve clack are oppositely and slidably connected in the valve body and are hinged with the valve rod through a connecting rod, the transmission assembly is connected with the valve rod, and the driving rod drives the valve rod to move and be positioned along the length direction of the driving assembly.

Through adopting above-mentioned technical scheme, the actuating lever removes along self length direction, and through drive assembly drive first valve clack and second valve clack towards being close to or the direction removal of keeping away from each other, realize the break-make of valve, easy and simple to handle effectively promotes work efficiency.

The invention is further provided with: the driving assembly comprises a positioning sleeve, a first sliding block, a second sliding block and a guide rod, wherein the positioning sleeve is fixed on the valve body, the first sliding block and the second sliding block are slidably connected in the positioning sleeve, a first inclined plane is formed in one side of the first sliding block, which faces the second sliding block, a second inclined plane which is used for abutting against the first inclined plane is formed in one side of the second sliding block, the guide rod is fixed on the side wall of the second sliding block, a sliding groove for placing the guide rod is formed in the side wall of the positioning sleeve, a third inclined plane which is used for abutting against the guide rod is formed in one end, away from the driving rod, of the positioning sleeve, the second sliding block is connected with the valve body through an elastic piece, and the valve rod is rotationally connected onto the second sliding block.

By adopting the technical scheme, the driving rod is pressed, the first sliding block moves towards the direction close to the second sliding block, the second sliding block is separated from the positioning sleeve, the valve rod moves along with the movement of the second sliding block, the second inclined surface rotates by a certain angle under the action of the first inclined surface and the second inclined surface, the guide rod corresponds to the third inclined surface, after the driving rod is loosened, the guide rod is embedded on the third inclined surface under the elastic action of the elastic piece, the guide rod is limited, at the moment, the first valve clack and the second valve clack are separated, and the valve is opened; similarly, the driving rod is pressed, the second sliding block is separated from the positioning sleeve, the second sliding block rotates for a certain angle under the action of the first inclined plane and the second inclined plane, after the driving rod is loosened, the guiding rod is placed in the sliding groove under the elastic action of the elastic piece, and at the moment, the first valve clack and the second valve clack are in contact, and the valve is closed; therefore, the on-off of the valve can be realized only by pressing the driving rod, and the efficiency is higher.

The invention is further provided with: the one end that is close to the second valve clack of first valve clack be fixed with the sealing block, the one end of second valve clack towards first valve clack set up and be used for inlaying and establish the mounting groove of sealing block.

Through adopting above-mentioned technical scheme, when first valve clack and second valve clack conflict, the sealing block inlays and locates in the mounting groove for water is difficult for spilling from between first valve clack and the second valve clack.

The invention is further provided with: the driving mechanism further comprises a labor-saving rod, the labor-saving rod is hinged to the valve body through a pin shaft, the labor-saving rod is abutted against one end, far away from the valve rod, of the driving rod, a pressing plate is connected to the other end of the labor-saving rod, and the distance from the pin shaft to the driving rod is smaller than that from the pin shaft to the pressing plate.

Through adopting above-mentioned technical scheme, because the water pressure in the water inlet pipe is great, through the setting of laborsaving pole, can increase the arm of force that drives the actuating lever and remove for it is more convenient to drive the actuating lever and remove, further promotes production efficiency.

The invention is further provided with: the denitration device comprises a catalyst and a denitration frame, wherein the catalyst is arranged in the denitration frame, a plurality of supporting frames are fixed in the denitration frame, the catalyst is arranged on the supporting frames, and a plurality of supporting frames are distributed along the height direction of the denitration frame.

Through adopting above-mentioned technical scheme, in the soot enters into denitration frame, through placing the catalyst on the support frame, arrange the support frame along the direction of height of denitration frame, can more fully promote the soot denitration efficiency.

The invention is further provided with: the support frame include a plurality of bracing pieces that are the V-arrangement, the catalyst locate on the bracing piece.

Through adopting above-mentioned technical scheme, the bracing piece is the setting of V-arrangement, can produce the trend that gathers with the catalyst toward the interior concave part that is close to the bracing piece, is convenient for change the catalyst.

In summary, the invention has the following beneficial effects:

the water inlet pipe injects water into the first water inlet section and the second water inlet section, so that the water quantity flowing through the boiler is smaller than the total water quantity of the water inlet pipe, when the boiler runs under high load, the temperature of the soot is increased, the soot passes through the boiler and enters the denitration device, the temperature is higher, the activity of the catalyst is higher, the denitration efficiency of the soot is higher, and meanwhile, the water quantity flowing through the boiler and the denitration device can be conveniently adjusted through the arrangement of the valve, so that the denitration device has higher production efficiency.

Drawings

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

FIG. 2 is a schematic diagram of a valve;

FIG. 3 is a schematic diagram showing the connection of a valve stem to a drive mechanism;

FIG. 4 is a schematic diagram of a structure embodying a driving structure;

fig. 5 is a schematic structural diagram showing a denitration frame.

Reference numerals: 1. a boiler; 2. a water inlet pipe; 21. a first water inlet section; 22. a second water inlet section; 31. a water storage tank; 32. a water pump; 4. a valve; 41. a valve body; 411. a mounting hole; 42. a valve stem; 43. a first valve flap; 431. a sealing block; 44. a second valve flap; 441. a mounting groove; 45. a connecting rod; 5. a driving mechanism; 51. a driving rod; 52. a transmission assembly; 521. a positioning sleeve; 522. a first slider; 523. a second slider; 524. a guide rod; 53. a first inclined surface; 54. a second inclined surface; 55. a third inclined surface; 56. a chute; 57. a guide bar; 58. a guide groove; 59. an elastic member; 6. a labor-saving rod; 61. a pin shaft; 71. a denitration rack; 72. a support frame; 721. a support rod; 722. a cross bar.

Detailed Description

The invention is further described with reference to the accompanying drawings.

As shown in fig. 1, a coal-fired combustion apparatus includes a boiler 1 for combusting coal. An economizer (not shown in the drawings) is installed in the boiler 1. The water supply device comprises a water inlet pipe 2, and the water inlet pipe 2 comprises a first water inlet section 21 and a second water inlet section 22. The first water inlet section 21 and the second water inlet section 22 are integrally provided. One end of the first water inlet section 21 is communicated with the water storage tank 31, and the other end is communicated with an inlet of the denitration device after passing through the boiler 1. One end of the second water inlet section 22 is communicated with the middle part of the first water inlet section 21, and the other end is communicated with an inlet of the denitration device. After the boiler 1 burns the coal, the generated soot is discharged from the boiler 1 and enters the denitration device.

A water pump 32 is installed on the first water inlet section 21, and the water pump 32 is arranged at one end of the first water inlet section 21 close to the water storage tank 31. Water is injected into the water storage tank 31.

The valve 4 is arranged on the first water inlet section 21 and the second water inlet section 22. The valve 4 located on the first water inlet section 21 is placed between the water pump 32 and the second water inlet section 22. As shown in fig. 2 and 3, the valve 4 includes a valve body 41, a valve stem 42, a first valve flap 43, a second valve flap 44, and a drive mechanism 5. The valve body 41 is provided with a water outlet. The first valve flap 43 and the second valve flap 44 are each provided in a rectangular parallelepiped shape. The first and second valve flaps 43 and 44 are disposed at left and right sides of the water outlet hole, respectively, and are slidably coupled to the valve body 41. The valve stem 42 is cylindrically disposed. Both connecting rods 45 are elongated. One end of a connecting rod 45 is hinged with the lower end of the valve rod 42, and the other end is hinged with the first valve clack 43; one end of the other connecting rod 45 is hinged with the lower end of the valve stem 42, and the other end is hinged with the second valve flap 44.

The valve body 41 is provided with a driving mechanism 5 for driving the valve rod 42 to move up and down and to be positioned. As shown in fig. 2 and 4, the driving mechanism 5 includes a driving lever 51 and a transmission assembly 52. The transmission assembly 52 includes a positioning sleeve 521, a first slider 522, a second slider 523, and a guide bar 524. The valve body 41 is provided with a mounting hole 411 having a circular cross section. A cylindrical positioning sleeve 521 is fixed to the mounting hole 411. The disk-shaped first slider 522 and second slider 523 are placed in the positioning sleeve 521 and slide along the length direction of the positioning sleeve 521. One end of the cylindrical driving rod 51 is placed in the positioning sleeve 521 and fixedly connected with the first slider 522, and the other end protrudes from the positioning sleeve 521. The outer wall of the driving rod 51 is fixed with a guide bar 57, and the inner wall of the mounting hole 411 is provided with a guide groove 58 for sliding connection with the guide bar 57. So that the driving lever 51 can move in the longitudinal direction of itself without being easily rotated in the circumferential direction.

The first slider 522 is provided with a plurality of first inclined surfaces 53 on a side facing the second slider 523. The first inclined surfaces 53 are uniformly distributed along the axis of the first slider 522. A plurality of second inclined surfaces 54 for abutting against the first inclined surfaces 53 are provided on a side of the second slider 523 facing the first slider 522, and the second inclined surfaces 54 are uniformly distributed along the axis of the second slider 523. The first inclined surface 53 and the second inclined surface 54 are arranged in a staggered manner. A plurality of guide rods 524 are fixed to the side walls of the second slider 523, and the guide rods 524 are uniformly distributed along the axis of the second slider 523. The elastic member 59 is a spring, and one end of the elastic member 59 is fixed to the valve body 41, and the other end abuts against a side of the second slider 523 away from the first slider 522. The elastic member 59 always applies elastic force to the second slider 523 in a direction approaching the first slider 522.

The end of the second slider 523 remote from the first slider 522 is rotatably coupled to the valve stem 42 by a bearing (not shown). The valve stem 42 is disposed coaxially with the second slider 523.

The end surface of the positioning sleeve 521 opposite to the end of the driving rod 51 is provided with a plurality of Z-shaped third inclined surfaces 55, and the plurality of third inclined surfaces 55 are uniformly distributed along the axis of the positioning sleeve 521. A plurality of sliding grooves 56 are formed in the side wall of the positioning sleeve 521, the sliding grooves 56 are uniformly distributed along the axis of the positioning sleeve 521, and the length direction of the sliding grooves 56 is parallel to the length direction of the positioning sleeve 521.

Pressing the driving rod 51, moving the driving rod 51 in a direction approaching the first slider 522, moving the first slider 522 and the second slider 523 in a direction separating from the positioning sleeve 521, separating the second slider 523 and the guiding rod 524 from the positioning sleeve 521, rotating the second slider 523 by a certain angle in the mounting hole 411 by the action of the first inclined surface 53 and the second inclined surface 54, associating the guiding rod 524 with the third inclined surface 55, releasing the driving rod 51, moving the second slider 523 in a direction approaching the first slider 522 by the elastic force of the elastic member 59, embedding the guiding rod 524 on the third inclined surface 55, and positioning the second slider 523; at this time, the valve rod 42 moves in a direction approaching the water outlet hole with the movement of the second slider 523, and the first valve flap 43 and the second valve flap 44 are pushed away from each other by the action of the two connecting rods 45, so that water can flow through the valve body 41.

Similarly, the driving rod 51 is pressed again, the first slider 522 ejects the second slider 523 from the positioning sleeve 521, and the second slider 523 rotates by a certain angle under the action of the first inclined surface 53 and the second inclined surface 54, the guiding rod 524 is taken out from the third inclined surface 55 and corresponds to the sliding groove 56, the driving rod 51 is released, and the guiding rod 524 is placed in the sliding groove 56 under the action of the elastic force of the elastic member 59. At this time, the valve rod 42 moves in a direction away from the water outlet hole with the movement of the second slider 523, and the first valve flap 43 and the second valve flap 44 are moved in a direction approaching each other by the action of the two connecting rods 45. And the first valve clack 43 and the second valve clack 44 are in contact with each other to seal the water outlet. Water is not likely to pass through the valve body 41.

In order to increase the tightness, a sealing block 431 is fixed on one side of the first valve clack 43 facing the second valve clack 44, a mounting groove 441 is formed on one side of the second valve clack 44 facing the first valve clack 43, and when the first valve clack 43 and the second valve clack 44 are in contact, the sealing block 431 is embedded in the mounting groove 441. Making it difficult for water to flow out from between the first flap 43 and the second flap 44.

Since the water generates a large pressure on the first and second valve flaps 43 and 44, it is laborious to press the driving lever 51. The drive mechanism 5 further comprises a labor saving lever 6. The labor-saving rod 6 is in a strip shape. The labor-saving lever 6 is hinged to the valve body 41 through a pin 61 and abuts against an end of the driving lever 51 remote from the first slider 522. The pin 61 is located at one end of the effort-saving lever 6 near the driving lever 51. The labor-saving rod 6 is pulled to be far away from one end of the driving rod 51, and the driving rod 51 can be moved more labor-saving through the lever principle.

As shown in fig. 5, the denitration device includes a catalyst and a denitration frame 71. The first water inlet section 21 and the second water inlet section 22 are injected into the denitration frame 71, and the denitration frame 71 is cooled. A plurality of support frames 72 for placing the catalyst are fixed in the denitration frame 71. Each support frame 72 includes two crossbars 722 and a plurality of support bars 721 arranged in a V-shape. The support bar 721 is positioned between the two crossbars 722 and is fixedly connected to the support bar 721, and the crossbars 722 are horizontally disposed. When the catalyst is placed on the support rod 721, it is able to be converged toward the inner recess of the support rod 721 by the action of gravity so as to facilitate the replacement of the catalyst. The plurality of support frames 72 are uniformly arranged along the height direction of the denitration frame 71.

In summary, in use, the water pump 32 is started to inject water into the first water inlet section 21 and the second water inlet section 22, the water flow of the first water inlet section 21 is reduced by the diversion effect of the second water inlet section 22, when the boiler 1 is operated under high load, the fire coal in the boiler 1 is not fully combusted, the temperature of the generated soot can be increased, the temperature of the generated soot is higher when the generated soot is introduced into the denitration frame 71, the reaction efficiency of the catalyst is higher, the water vapor in the first water inlet section 21 and the water in the second water inlet section 22 are injected into the denitration frame 71, and the denitration frame 71 is fully cooled; meanwhile, the labor-saving rod 6 is pulled, so that the on-off of the first water inlet section 21 and the second water inlet section 22 can be controlled, and the water inlet amount of the boiler 1 and the denitration frame 71 can be conveniently adjusted.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims

1. The utility model provides a coal-fired combustion apparatus, includes boiler (1), denitrification facility and water supply installation, boiler (1) be connected with denitrification facility, boiler (1) in install the economizer, economizer and denitrification facility intercommunication, water supply installation include water inlet pipe (2), denitrification facility include catalyst, characterized by: the water inlet pipe (2) comprises a first water inlet section (21) and a second water inlet section (22), one end of the first water inlet section (21) is communicated with the water tank, the other end of the first water inlet section is communicated with the boiler (1), one end of the second water inlet section (22) is communicated with the middle part of the first water inlet section (21), and the other end of the second water inlet section is communicated with the denitration device;

the water supply device also comprises a plurality of valves (4), wherein the valves (4) are respectively arranged on the first water inlet section (21) and the second water inlet section (22), and the valve (4) arranged on the first water inlet section (21) is positioned at one end of the first water inlet section (21) far away from the boiler (1);

the valve (4) comprises a valve body (41), a valve rod (42), a first valve clack (43), a second valve clack (44) and a driving mechanism (5), wherein the driving mechanism (5) comprises a driving rod (51) and a transmission assembly (52), the first valve clack (43) and the second valve clack (44) are oppositely and slidably connected in the valve body (41) and are hinged with the valve rod (42) through a connecting rod (45), the transmission assembly (52) is connected with the valve rod (42), and the driving rod (51) drives the valve rod (42) to move and be positioned along the length direction of the driving rod (52);

the transmission assembly (52) comprises a positioning sleeve (521), a first sliding block (522), a second sliding block (523) and a guide rod (524), wherein the positioning sleeve (521) is fixed on the valve body (41), the first sliding block (522) and the second sliding block (523) are slidably connected in the positioning sleeve (521), a first inclined surface (53) is formed in one side of the first sliding block (522) facing the second sliding block (523), a second inclined surface (54) for abutting against the first inclined surface (53) is formed in one side of the second sliding block (523) facing the first sliding block (522), the guide rod is fixed on the side wall of the second sliding block (523), a sliding groove (56) for accommodating the guide rod (524) is formed in the side wall of the positioning sleeve (521), a third inclined surface (55) for abutting against the guide rod (524) is formed in one end of the positioning sleeve (521) far away from the driving rod (51), the second sliding block (523) is connected with the valve body (41) through an elastic piece (59), and the guide rod (42) is connected to the second sliding block (523).

2. A coal burning apparatus according to claim 1, wherein: one end of the first valve clack (43) close to the second valve clack (44) is fixed with a sealing block (431), and one end of the second valve clack (44) facing the first valve clack (43) is provided with a mounting groove (441) for embedding the sealing block (431).

3. A coal burning apparatus according to claim 2, characterized in that: the driving mechanism (5) further comprises a labor-saving rod (6), the labor-saving rod (6) is hinged to the valve body (41) through a pin shaft (61), the labor-saving rod (6) is abutted against one end, far away from the valve rod (42), of the driving rod (51), the other end of the driving rod is connected with a pressing plate, and the distance from the pin shaft (61) to the driving rod (51) is smaller than the distance from the pin shaft (61) to the pressing plate.

4. A coal burning apparatus according to claim 3, wherein: the denitration device comprises a catalyst and a denitration rack (71), the catalyst is arranged in the denitration rack (71), a plurality of support frames (72) are fixed in the denitration rack (71), the catalyst is arranged on the support frames (72), and a plurality of support frames (72) are distributed along the height direction of the denitration rack (71).

5. A coal burning apparatus according to claim 4, wherein: the support frame (72) comprises a plurality of V-shaped support rods (721), and the catalyst is arranged on the support rods (721).