Preheating equipment for power plant furnaces

Abstract

A preheating device for a furnace of a power plant, comprising: a heating bottle, a contact rod, a varicose traction part, a nickel-chromium electric furnace wire, and a folding part; a heating chamber is arranged inside the heating bottle; a plurality of nickel-chromium electric furnace wires are installed inside the heating bottle; an exhaust passage is arranged on one side of the top of the heating bottle, and an air supply passage with an exhaust fan arranged on the bottom of the heating bottle; the contact rod 4 is installed at the bottom of the heating bottle; a plurality of contact passages are equidistantly arranged on the contact rod and are penetrated through the top and the bottom; combined with other structures, the defects of poor heating efficiency and high power loss in the preheating mode of the boiler furnace in the prior art are effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of heating up a power plant, and in particular relates to a pre-heating device for a furnace of a power plant. Background Art

[0002] Thermal power generation is the use of heat energy obtained from burning fuel (coal, petroleum and its products, natural gas, etc.) to generate electricity. There are two main forms of thermal power generation units: using boilers to generate high-temperature and high-pressure steam to drive steam turbines to rotate and traction generators to generate electricity, which is called a steam turbine generator set; fuel enters the gas turbine to directly convert heat energy into mechanical energy to traction generators to generate electricity, which is called a gas turbine generator set. Power plants usually refer to power plants that mainly use steam turbine generator sets.

[0003] A power plant is mainly composed of four key components, namely boiler, steam turbine, condenser and generator. Fuel combustion converts chemical energy into thermal energy to heat the water in the boiler into steam, and then the steam heat energy drives the steam turbine to do work, converting thermal energy into mechanical energy, and then the mechanical energy is converted into electrical energy through the generator, thus completing the entire power generation process.

[0004] When the boiler of a power plant is put into operation again after a period of time, it is often necessary to preheat before it can be put into use. The current preheating mode of the boiler furnace is often through a vertical bottle part, in which a high-efficiency heater is placed. On one side of the bottle part is an air supply passage with an exhaust fan, and on the other side of the bottle part is an exhaust passage. The incoming air from the exhaust fan passes horizontally through the bottle part to heat the heater. The heating efficiency of this structure is poor, resulting in a high power loss. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a pre-heating device for a power plant furnace, which effectively avoids the defects of the prior art pre-heating mode for the boiler furnace, such as poor heating efficiency and high power loss.

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a solution for a preheating device for a furnace of a power plant, which is as follows:

[0007] A preheating device for a furnace of a power plant, comprising:

[0008] A heating bottle 2, a contact rod 4, a varicose traction part 6, a nickel-chromium electric furnace wire 10, and a folding part 5; a heating chamber 22 is arranged inside the heating bottle 2; a plurality of nickel-chromium electric furnace wires 10 are installed inside the heating bottle 2; an exhaust passage 24 is arranged on the top side of the heating bottle 2, and an air supply passage 23 with an exhaust fan installed on the bottom side of the heating bottle 2; the contact rod 4 is installed at the bottom of the heating bottle 2; a plurality of contact passages 42 are arranged equidistantly on the contact rod 4 and are penetrated through the top and bottom thereof; the folding part 5 is installed inside the heating bottle 2; the folding part 5 is installed on the contact rod 4; the folding part 5 has a plurality of An arched piece 52 for traction; the plurality of arched pieces 52 for traction are cross-arranged on both sides of the temperature-raising bottle 2 from low to high; the top of the arched piece 52 for traction is tilted toward the inner surface of the temperature-raising bottle 2, and the bottom of the arched piece 52 for traction is tilted toward the center line of the temperature-raising bottle 2; the varicose traction part 6 pulls the plurality of arched pieces 52 for traction to move; the arched pieces 52 for traction on both sides of the temperature-raising bottle 2 from low to high move back and forth in sequence in the direction of moving toward the midpoint of the cross-section of the temperature-raising bottle 2; the varicose traction part 6 is assembled on the outer surface of one side of the temperature-raising bottle 2; the varicose traction part 6 pulls the contact rod 4 to move back and forth vertically.

[0009] Preferably, the folding portion 5 also includes a plurality of moving rods 54, a plurality of spiral beryllium copper wires 57, a plurality of follower sheets 55, a flexible traction ring 53, and a plurality of traction sheets 56; the outer surface of each of the arched sheets 52 for traction is connected to a moving rod 54 one by one; the moving rod 54 is flexible and installed on the temperature-raising bottle 2 in a transparent manner; one end of the moving rod 54 is fixedly connected to the outer surface of the arched sheet 52 for traction, and the other end extends to the outer surface of the temperature-raising bottle 2; the other end of each of the moving rods 54 is connected to a follower sheet 55 one by one; spiral beryllium copper wires 57 are respectively wound around the moving rods 54; the spiral beryllium copper wires 57 are installed between the follower sheet 55 and the temperature-raising bottle in a contractible manner 2 outer surfaces; the expandable traction ring 53 is hoop-connected to the outer surface of the temperature-raising bottle 2 and is located on the outer surfaces of a plurality of follower sheets 55; a plurality of traction sheets 56 are installed inside the expandable traction ring 53; the traction sheets 56 are cross-arranged on both sides of the expandable traction ring 53 from low to high; the traction sheets 56 and the follower sheets 55 are respectively connected one by one; when the traction sheet 56 moves vertically, the follower sheet 55 is pulled back and forth in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2; the follower sheet 55 pulls the moving rod 54 and the arched sheet 52 for traction to move back and forth in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2; the expandable traction portion 6 pulls the expandable traction ring 53 to move back and forth vertically.

[0010] Preferably, a linkage contact type inclined wall 552 is provided on the outer surface of the follower plate 55; a traction contact type inclined wall 562 is provided on the inner surface of the traction plate 56; the traction plate 56 is connected to the linkage contact type inclined wall 552 of the follower plate 55 via the traction contact type inclined wall 562; when the traction contact type inclined wall 562 of the traction plate 56 moves vertically, the linkage contact type inclined wall 552 of the traction follower plate 55 moves in the direction toward the midpoint of the cross section of the temperature-raising bottle 2, and pushes the follower plate 55 toward the outer surface via the spiral beryllium copper wire 57, so that the follower plate 55 is restored to the outer surface.

[0011] Preferably, the vertical spacing U between the traction piece 56 and the follower piece 55 that are pressed against each other on the outer surfaces of the arched pieces 52 for traction that are cross-distributed from low to high increases sequentially from low to high.

[0012] Preferably, the varicose traction part 6 comprises a traction piston 62, a traction bar 64, and a transition bar 65;

[0013] The traction piston 62 is mounted on the outer surface of the bottom of the thermos bottle 2; the top of the traction piston 62 is flexibly connected to the traction bar 64;

[0014] One end of the traction strip 64 is vertically and expandably disposed in the temperature-increasing bottle 2 and connected to one side of the contact rod 4 ; the other end of the traction strip 64 is fixedly connected to a transition strip 65 ; the transition strip 65 is connected to one side of the bottom of the expandable traction ring 53 .

[0015] Preferably, a rubber material closed ring 642 is arranged around the traction strip 64; an opening 25 is arranged on the heating bottle 2; the traction strip 64 is penetrated to the opening 4 of the heating bottle 2; the inner ring of the rubber material closed ring 642 is closed and connected to the traction strip 64, and the outer ring of the rubber material closed ring 642 is closed and connected to the periphery of the opening 25.

[0016] Preferably, a rubber material closing ring 542 is provided around the periphery of the moving rod 54; a plurality of openings 26 are provided on the heating bottle 2; the moving rod 54 is penetrated to the openings 26 of the heating bottle 2; the inner ring of the rubber material closing ring 542 is closed and connected to the moving rod 54, and the outer ring of the rubber material closing ring 542 is closed and connected to the periphery of the openings 26; the heating chamber 22 is a cylindrical structure; a contact ring 44 is provided on the peripheral outer surface of the bottom of the contact rod 4; the contact rod 4 is screwed onto the peripheral inner surface of the heating bottle 2 via the contact ring 44 around the bottom.

[0017] Preferably, the contact ring 44 is made of propylene.

[0018] The beneficial effects of the present invention are:

[0019] The present invention uses the varicose traction part to pull the contact rod to move back and forth vertically, so that the air from the exhaust fan initially causes the contact passage in the contact rod to be disassembled into tributaries and heated up. Then, due to the back and forth vertical movement of the contact rod, the air from the exhaust fan and the contact passage of the contact rod 4 will perform contact-type relative movement, so that the contact rod and the air from the exhaust fan are in close contact and heated up, thereby increasing the temperature increase of the air from the exhaust fan. When the air from the exhaust fan continues to move upward, because of the plurality of traction parts, the air from the exhaust fan is heated up. The arched pieces are arranged crosswise from low to high on both sides of the temperature-raising bottle, and the arched pieces used for traction from low to high move back and forth in the direction of the midpoint of the cross section of the temperature-raising bottle, so as to form a method of moving the air from the exhaust fan upward in a meandering shape, so that the air from the exhaust fan moves upward in a meandering shape inside the temperature-raising bottle, and the air from the exhaust fan allows the arched pieces used for traction to perform variable excitation dispersion, which greatly increases the heating time and heating effect of the air from the exhaust fan. It effectively avoids the defects of poor heating efficiency and high power loss in the pre-heating mode of the boiler furnace in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the preheating device for the furnace of a power plant according to the present invention.

[0021] Figure 2 It is a partial structural diagram of the warming bottle, contact rod, and varicose traction part of the present invention.

[0022] Figure 3 It is a structural diagram of the folding section of the present invention.

[0023] Figure 4 It is a projection diagram of the folding portion of the present invention.

[0024] Figure 5 Schematic diagram of the motion bar of the present invention.

[0025] Figure 6 Schematic diagram of the arched sheet of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-Figure 6 As shown, a preheating device for a furnace of a power plant comprises:

[0028] A heating bottle 2, a contact rod 4, a varicose traction part 6, a nickel-chromium electric furnace wire 10, and a folding part 5; a heating chamber 22 is arranged inside the heating bottle 2; a plurality of nickel-chromium electric furnace wires 10 are installed inside the heating bottle 2; an exhaust passage 24 is arranged on the top side of the heating bottle 2, and an air supply passage 23 on which an exhaust fan is installed is arranged on the bottom side of the heating bottle 2; the contact rod 4 is installed at the bottom of the heating bottle 2; the contact rod 4 is a rod-shaped structure; a plurality of contact passages 42 are equidistantly arranged on the contact rod 4 and are penetrated through the top and bottom thereof; the folding part 5 is installed inside the heating bottle 2; the folding part 5 is installed on the contact rod 4; the folding part The row part 5 has a plurality of arched pieces 52 for traction; the plurality of arched pieces 52 for traction are cross-arranged on both sides of the temperature-raising bottle 2 from low to high; the top of the arched piece 52 for traction is tilted toward the inner surface of the temperature-raising bottle 2, and the bottom of the arched piece 52 for traction is tilted toward the center line of the temperature-raising bottle 2; the varicose traction part 6 pulls the plurality of arched pieces 52 for traction to move; the arched pieces 52 for traction on both sides of the temperature-raising bottle 2 from low to high move back and forth in sequence in the direction of moving toward the midpoint of the cross-section of the temperature-raising bottle 2; the varicose traction part 6 is assembled on the outer surface of one side of the temperature-raising bottle 2; the varicose traction part 6 pulls the contact rod 4 to move back and forth vertically.

[0029] Preferably, the folding portion 5 also includes a plurality of moving rods 54, a plurality of spiral beryllium copper wires 57, a plurality of follower sheets 55, a flexible traction ring 53, and a plurality of traction sheets 56; the outer surface of each of the arched sheets 52 for traction is connected to a moving rod 54 one by one; the moving rod 54 is flexible and installed on the temperature-raising bottle 2 in a transparent manner; one end of the moving rod 54 is fixedly connected to the outer surface of the arched sheet 52 for traction, and the other end extends to the outer surface of the temperature-raising bottle 2; the other end of each of the moving rods 54 is connected to a follower sheet 55 one by one; spiral beryllium copper wires 57 are respectively wound around the moving rods 54; the spiral beryllium copper wires 57 are installed between the follower sheet 55 and the temperature-raising bottle in a contractible manner 2 outer surfaces; the expandable traction ring 53 is hoop-connected to the outer surface of the temperature-raising bottle 2 and is located on the outer surfaces of a plurality of follower sheets 55; a plurality of traction sheets 56 are installed inside the expandable traction ring 53; the traction sheets 56 are cross-arranged on both sides of the expandable traction ring 53 from low to high; the traction sheets 56 and the follower sheets 55 are respectively connected one by one; when the traction sheet 56 moves vertically, the follower sheet 55 is pulled back and forth in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2; the follower sheet 55 pulls the moving rod 54 and the arched sheet 52 for traction to move back and forth in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2; the expandable traction portion 6 pulls the expandable traction ring 53 to move back and forth vertically.

[0030] Preferably, a linkage contact type inclined wall 552 is provided on the outer surface of the follower plate 55; a traction contact type inclined wall 562 is provided on the inner surface of the traction plate 56; the traction plate 56 is connected to the linkage contact type inclined wall 552 of the follower plate 55 via the traction contact type inclined wall 562; when the traction contact type inclined wall 562 of the traction plate 56 moves vertically, the linkage contact type inclined wall 552 of the traction follower plate 55 moves in the direction toward the midpoint of the cross section of the temperature-raising bottle 2, and pushes the follower plate 55 toward the outer surface via the spiral beryllium copper wire 57, so that the follower plate 55 is restored to the outer surface.

[0031] Preferably, the vertical spacing U between the traction piece 56 and the follower piece 55 that are pressed against each other on the outer surfaces of the cross-distributed arched pieces 52 for traction from low to high is increased in sequence from low to high, and the two pairs of arched pieces 52 for traction in the present application are respectively set as 52W, 52X, 52Y, and 52Z from low to high. There are two pairs of arched pieces 52 for traction in the present application, and each arched piece 52 for traction has a pair of traction pieces 56 and a follower piece 55 that are pressed against each other on the outer surface. 6 and the follower sheet 55, so there are four pairs of traction sheets 56 and the follower sheet 55, so there are two pairs of vertical spacing sizes U, and the two pairs of vertical spacing sizes U increase in order from low to high, that is, the vertical spacing sizes U of the traction sheets 56 and the follower sheet 55 on the outer surfaces of 52W, 52X, 52Y, and 52Z increase in order; when the flexible traction ring 53 moves upward, 52W, 52X, 52Y, and 52Z are pulled by the flexible traction ring 53. The two pairs of traction plates 56 on the outer surface move upward together, and then the traction plates 56 on the outer surface of the arched plate 52 used for traction of 52W initially push against the following plate 55, so that the following plate 55 on the outer surface of the traction plate 52W moves inward in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2, so that the arched plate 52 used for traction of 52W moves in the direction of the pointed line, and then the expandable traction ring 53 continues to move upward, so that the traction plates 56 on the outer surface of the arched plate 52 used for traction of 52X then push against the following plate 55, so that the arched plate 52 used for traction of 52X moves in the direction of the pointed line, and the sequence is like this, the arched plates 52 used for traction of 52Y and 52Z are executed in sequence to move in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle 2, so that the arched plates 52 used for traction of 52W, 52X, 52Y, and 52Z move crosswise from high to low in sequence, and the air intake from the traction exhaust fan is a winding vertical movement.

[0032] Preferably, the varicose traction part 6 comprises a traction piston 62, a traction bar 64, and a transition bar 65;

[0033] The traction piston 62 is mounted on the outer surface of the bottom of the thermos bottle 2; the top of the traction piston 62 is flexibly connected to the traction bar 64;

[0034] One end of the traction strip 64 is vertically and flexibly installed in the thermos bottle 2 and connected to one side of the contact rod 4; the other end of the traction strip 64 is fixedly connected to a transition strip 65; the transition strip 65 is connected to one side of the bottom of the flexibly traction ring 53. In this way, the contact rod 4 and the folding part 5 can be pulled simultaneously through the flexibly traction part 6.

[0035] Preferably, a rubber material closed ring 642 is arranged around the traction strip 64; an opening 25 is arranged on the heating bottle 2; the traction strip 64 is penetrated to the opening 4 of the heating bottle 2; the inner ring of the rubber material closed ring 642 is closed and connected to the traction strip 64, and the outer ring of the rubber material closed ring 642 is closed and connected to the periphery of the opening 25.

[0036] Preferably, a rubber material closing ring 542 is provided around the periphery of the moving rod 54; a plurality of openings 26 are provided on the heating bottle 2; the moving rod 54 is penetrated to the openings 26 of the heating bottle 2; the inner ring of the rubber material closing ring 542 is closed and connected to the moving rod 54, and the outer ring of the rubber material closing ring 542 is closed and connected to the periphery of the openings 26; preferably, the heating chamber 22 is a cylindrical structure; a contact ring 44 is provided on the peripheral outer surface of the bottom of the contact rod 4; the contact rod 4 is screwed onto the peripheral inner surface of the heating bottle 2 via the contact ring 44 around the bottom.

[0037] Preferably, the contact ring 44 is made of propylene.

[0038] The present application uses the varicose traction part 6 to pull the contact rod 4 to move back and forth vertically, so that the air from the exhaust fan initially causes the contact passage 42 in the contact rod 4 to be disassembled into branch flows for heating, and then because of the back and forth vertical movement of the contact rod 4, the air from the exhaust fan and the contact passage 42 of the contact rod 4 will perform contact-type relative movement, so that the contact rod 4 and the air from the exhaust fan are in close contact and heated, thereby increasing the temperature increase of the air from the exhaust fan; when the air from the exhaust fan continues to move upward, because of the plurality of traction parts, the air from the exhaust fan is heated by the contact passage 42 of the contact rod 4. The arched pieces 52 are cross-arranged on both sides of the temperature-raising bottle 2 from low to high, and the arched pieces 52 used for traction move back and forth in the direction of the midpoint of the cross section of the temperature-raising bottle 2 from low to high. This constitutes an operation method for moving the incoming air from the exhaust fan upward in a winding shape, so that the incoming air from the exhaust fan moves upward in a winding shape in the temperature-raising bottle 2. In addition, the incoming air from the exhaust fan allows the arched pieces 52 used for traction to perform variable excitation dispersion, which greatly increases the heating time and heating effect of the incoming air from the exhaust fan.

[0039] The present invention has been described above in an illustrative manner using embodiments. Those skilled in the art should understand that the present disclosure is not limited to the embodiments described above, and that various changes, modifications and substitutions may be made without departing from the scope of the present invention.

Claims

1. A preheating device for a furnace of a power plant, characterized in that: include: A heating bottle, a contact rod, a varicose traction part, a nickel-chromium electric furnace wire, and a folding part; a heating chamber is arranged inside the heating bottle; a plurality of nickel-chromium electric furnace wires are installed inside the heating bottle; an exhaust passage is arranged on the top side of the heating bottle, and an air supply passage with an exhaust fan arranged on the bottom side of the heating bottle; the contact rod is installed at the bottom of the heating bottle; a plurality of contact passages penetrating the top and the bottom of the contact rod are arranged at equal intervals; the folding part is installed inside the heating bottle; the folding part is installed on the contact rod; the folding part has a plurality of The arched pieces for traction are arranged crosswise on both sides of the temperature-raising bottle from low to high; the top of the arched piece for traction is tilted toward the inner surface of the temperature-raising bottle, and the bottom of the arched piece for traction is tilted toward the center line of the temperature-raising bottle; the varicose traction part pulls the arched pieces for traction to move; the arched pieces for traction on both sides of the temperature-raising bottle from low to high move back and forth in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle; the varicose traction part is assembled on the outer surface of one side of the temperature-raising bottle; the varicose traction part pulls the contact rod to move back and forth vertically; The folding part also includes a plurality of moving rods, a plurality of spiral beryllium copper wires, a plurality of follower sheets, a flexible traction ring, and a plurality of traction sheets; the outer surface of each of the arched sheets for traction is connected to a moving rod in a corresponding manner; the moving rod is flexible and installed on the temperature-raising bottle in a transparent manner; one end of the moving rod is fixedly connected to the outer surface of the arched sheet for traction, and the other end extends to the outer surface of the temperature-raising bottle; the other end of each of the moving rods is connected to a follower sheet in a corresponding manner; spiral beryllium copper wires are respectively wound around the moving rods; the spiral beryllium copper wires are installed between the follower sheet and the outer surface of the temperature-raising bottle in a shrinking manner The flexible traction ring is connected to the outer surface of the temperature-raising bottle and is located on the outer surface of a plurality of follower plates; a plurality of traction plates are installed inside the flexible traction ring; the traction plates are cross-arranged on both sides of the flexible traction ring from low to high; the traction plates and the follower plates are respectively connected one by one; when the traction plate moves vertically, the follower plate is pulled back and forth in the direction of the midpoint of the cross section of the temperature-raising bottle; the follower plate pulls the moving rod and the arched plate for traction to move back and forth in the direction of the midpoint of the cross section of the temperature-raising bottle; the flexible traction part pulls the flexible traction ring to move back and forth vertically; The outer surface of the following piece is provided with a linkage contact inclined wall; the inner surface of the traction piece is provided with a traction contact inclined wall; the traction piece is connected to the linkage contact inclined wall of the following piece via the traction contact inclined wall; when the traction contact inclined wall of the traction piece moves vertically, the linkage contact inclined wall of the traction following piece moves in the direction of moving toward the midpoint of the cross section of the temperature-raising bottle, and the spiral beryllium copper wire pushes the following piece toward the outer surface, so that the following piece is restored toward the outer surface; The vertical spacing U between the traction plates and the follower plates, which are pressed against each other by the outer surfaces of the arched plates for traction and which are cross-distributed from low to high, increases in sequence from low to high.

2. The preheating device for the furnace of a power plant according to claim 1, characterized in that: The varicose traction part comprises a traction piston, a traction bar, and a transition bar; The traction piston is mounted on the outer surface of the bottom of the temperature-raising bottle; the top of the traction piston is flexibly connected to the traction bar; One end of the traction strip is vertically and expandably arranged in the heating bottle and connected to one side of the contact rod; the other end of the traction strip is fixedly connected to a transition strip; the transition strip is connected to one side of the bottom of the expandable traction ring.

3. The preheating device for the furnace of a power plant according to claim 2 is characterized in that: A rubber material closed ring is arranged around the traction strip; an opening is arranged on the heating bottle; the traction strip is penetrated to the opening of the heating bottle; the inner ring of the rubber material closed ring is closed and connected to the traction strip, and the outer ring of the rubber material closed ring is closed and connected to the periphery of the opening.

4. The preheating device for the furnace of a power plant according to claim 1, characterized in that: The periphery of the movement rod is provided with two rubber material closed rings; the heating bottle is provided with a plurality of openings; the movement rod is penetrated to the two openings of the heating bottle; the inner ring of the two rubber material closed rings is closed and connected to the movement rod, and the outer ring of the two rubber material closed rings is closed and connected to the periphery of the two openings; the heating chamber is a cylindrical structure; the peripheral outer surface of the bottom of the contact rod is provided with a contact ring; the contact rod is screwed onto the peripheral inner surface of the heating bottle via the contact ring at the bottom periphery.

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