CN211739155U - Fin tubular air preheater - Google Patents
Fin tubular air preheater Download PDFInfo
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- CN211739155U CN211739155U CN201921626548.1U CN201921626548U CN211739155U CN 211739155 U CN211739155 U CN 211739155U CN 201921626548 U CN201921626548 U CN 201921626548U CN 211739155 U CN211739155 U CN 211739155U
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- abrasion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to a fin tubular air preheater, there is air preheater channel case in the shell, the shell is equipped with flue gas inlet and outlet pipeline from top to bottom, the middle of the side middle lower part is equipped with air inlet pipeline, the middle of the side upper part is equipped with air outlet pipeline, the middle of the inside middle lower part is the air internal inlet channel, the air preheater channel case is equipped with around the air internal inlet channel, the middle of the upper part of the shell is the air internal outlet channel, the air preheater channel case is equipped around the air internal outlet channel; the air preheater tube box comprises fin preheating tubes, and an anti-abrasion and anti-corrosion device is arranged on the fin preheating tubes. The gap between the upper preheater tube box and the lower preheater tube box is a flue gas channel. The upper part and the lower part of the air internal inlet channel and the air internal outlet channel are respectively composed of clapboards. An air preheating device is arranged in the air internal inlet channel. The utility model has the advantages of no air leakage, good heat transfer effect, wear resistance, low temperature corrosion resistance, no ash blockage, convenient installation and maintenance, etc.
Description
Technical Field
The utility model relates to an air heater equipment, specifically say and relate to a fin tubular air heater.
Background
The air preheater is a device for improving the heat exchange performance of the boiler and reducing the energy consumption, namely preheating the air before entering the boiler to a certain temperature by the smoke in the tail flue of the boiler through the internal radiating fins. Currently available air preheaters are generally classified into tubular air preheaters and rotary air preheaters.
1. Tubular air preheater
The flue gas passes through the inside of the pipe, and the air passes through the outside of the pipe, so that heat exchange is realized. The flue gas erodes the inside of the pipe to cause abrasion leakage, and the pipe leakage is caused by low-temperature flue gas corrosion of the pipe type air preheater at a low-temperature section, and the air leakage rate is particularly high. The pipe has serious dust deposition, causes blockage and has poor heat transfer effect.
2. Rotary air preheater
The rotary air preheater has one rotary heating surface, large rotor diameter and flue gas and air passage. The air side is divided into a primary air channel and a secondary air channel, when the flue gas flows through the rotor, the flue gas releases heat to the heat storage elements in the bin, and the temperature of the flue gas is reduced; when the heat storage element is rotated to the air side, heat is released again to the air, and the air temperature rises. The heat exchange between the smoke and the air is realized by the repeated circulation. The rotary air preheater is generally adopted by large-scale thermal power generating units due to the characteristics of high heat transfer density, compact structure and the like. However, the rotary air preheater has the problems of abrasion of the heat storage sheet, low-temperature corrosion of the heat storage sheet, air leakage, dust leakage carried by smoke, and the like, and the subsequent equipment, namely the pulverized coal burner and the oil gun, are seriously abraded due to the dust leakage.
Disclosure of Invention
The utility model aims to solve the technical problem that a fin tubular air preheater who does not leak wind, heat transfer effect is good, stand wear and tear, anti low temperature corrosion, not stifled grey, be convenient for installation and maintenance is provided.
In order to solve the technical problem, the utility model discloses a technical scheme does: a fin tube type air preheater comprises a shell, wherein an air preheater tube box is arranged in the shell, smoke inlet and outlet pipelines are arranged at the upper and lower parts of the shell, an air inlet pipeline is arranged in the middle of the middle lower part of the side surface of the shell, an air outlet pipeline is arranged in the middle of the upper part of the side surface of the shell, an air internal inlet channel is arranged in the middle of the middle lower part of the inner part of the shell, the air preheater tube box is arranged at two sides of the air internal inlet channel, an air internal outlet channel is arranged in the middle of the upper part of the inner; the air preheater tube boxes comprise fin preheating tubes, the fin preheating tubes are provided with anti-abrasion and anti-corrosion devices, the upper and lower adjacent air preheater tube boxes are communicated with each other, and the fin preheating tubes of the upper and lower adjacent air preheater tube boxes are communicated with each other; the upper part and the lower part of the air internal inlet channel are respectively provided with a partition plate group, the upper part and the lower part of the air internal outlet channel are respectively provided with a partition plate, and the air internal inlet channel is internally provided with an air preheating device.
Preferably, the flue gas inlet and outlet pipeline comprises a flue gas inlet pipeline arranged on the upper part of the shell and a flue gas outlet pipeline arranged on the lower part of the shell, the air preheating device comprises a plurality of steam-water heating pipes, one ends of the steam-water heating pipes penetrate through a partition plate below an air internal inlet channel and are communicated with a steam-water header arranged at the flue gas outlet pipeline, and the steam-water header is communicated with a steam-water supply system.
Preferably, the steam-water make-up water supply system comprises a water tank, a water supply pipe, a water level meter, a communication valve, a water make-up valve and a water supply valve, wherein the water supply pipe is provided with the water make-up valve and the water supply valve, one end of the water supply pipe is communicated with the water tank, the other end of the water supply pipe is communicated with the steam-water header, the water tank is provided with the water level meter, and the water level meter is communicated with the water.
Preferably, the air preheating device comprises a plurality of U-shaped heating pipes, and the plurality of U-shaped heating pipes pass through an upper partition plate of the air internal inlet channel.
Preferably, a communicating air channel is arranged in the middle of the inside of the shell, a partition plate below an air internal outlet channel is arranged on the upper side of the communicating air channel, a partition plate above an air internal inlet channel is arranged on the lower side of the communicating air channel, one part of the U-shaped heating pipe is positioned in the communicating air channel, and the other part of the U-shaped heating pipe is positioned in the air internal inlet channel.
Preferably, the shell outside still is provided with hot air recirculation system, hot air recirculation system includes fan and circulation hot-blast main, and circulation hot-blast main connects the fan, and circulation hot-blast main wind inlet passes through the inside exit passage of air outlet pipe intercommunication air, and circulation hot-blast main wind export passes through the inside entering passage of air inlet pipe intercommunication air, and circulation hot-blast main wind inlet department is provided with electronic picture peg door.
Preferably, the air preheater tube box comprises a plurality of fin preheating tubes, a box plate and tube plates, the fin preheating tubes are arranged side by side, the box plate is arranged in a front-back symmetrical mode, the tube plates are arranged in a left-right symmetrical mode, the fin preheating tubes are arranged in a space defined by the box plate and the tube plates in a left-right direction, two ends of each fin preheating tube are respectively and correspondingly located at two tube plates, and two ends of each fin preheating tube respectively penetrate through the tube plates.
Preferably, the air preheater tube boxes are divided into two rows from left to right, more than two rows are arranged in the front-back direction, more than three layers are arranged in the up-down direction, adjacent air preheater tube boxes are connected in a sealing mode through U-shaped corrugated expansion joints, a communicating air box is arranged outside the shell, and one end of a fin preheating tube of each air preheater tube box is communicated through the communicating air box.
Preferably, the anti-abrasion and anti-corrosion device on the fin preheating pipe in the air preheater pipe box on two sides of the air internal inlet channel comprises fins, an anti-abrasion cover and a connecting anti-abrasion cover, the fins are arranged on two sides of the fin preheating pipe, hanging ports are arranged on the fins, the anti-abrasion cover is C-shaped, the anti-abrasion cover is respectively buckled between the two fins on the outer side of the fin preheating pipe, the fins are fixedly connected with the anti-abrasion cover through the hanging ports, and the arc-shaped side of the connecting anti-abrasion cover is buckled on the side edges of the two anti-abrasion covers.
Preferably, the anti-abrasion and anti-corrosion device on the fin preheating pipe in the air preheater pipe box on two sides of the air internal outlet channel comprises a long-strip fin, an anti-abrasion tile and a connecting anti-abrasion tile, the long-strip fin penetrates through the fin preheating pipe, two sides of the long-strip fin are exposed outside the fin preheating pipe, hanging openings are formed in two outer edges of the long-strip fin, the anti-abrasion tile is buckled on the fin preheating pipe, the long-strip fin is fixedly connected with the anti-abrasion tile through the hanging openings, and one side of the connecting anti-abrasion tile is buckled on the side edges of the two anti-abrasion tiles.
According to the technical scheme, the fin tube type air preheater adopts the fin tubes to assemble the air preheater tube box, smoke flows outside the fin preheating tube, air flows inside the fin preheating tube, low-temperature corrosion and erosion abrasion of the smoke are avoided through the anti-abrasion tile and the anti-corrosion cover, the smoke flows outside the tube, the smoke speed is low, abrasion of the tube wall of the air preheater is reduced, the air flows inside the fin preheating tube, heat exchange is carried out between the air and the fins inside the tube, the air temperature is rapidly increased, and low-temperature corrosion of the smoke is avoided.
The heat transfer performance of the flue gas and the air is improved by the internal and external of the long fins through the preheating pipe.
The wear-resistant tile is arranged on the long-strip fin tube of the wear-resistant and corrosion-resistant device of the preheater tube box at the second-level, the third-level and the fourth-level high-temperature sections, so that the pipe wall of the pipe is prevented from being eroded, worn and corroded by flue gas, and leakage is avoided.
The anti-abrasion and anti-corrosion protective cover layer is arranged on the circumference of the fin preheating pipe and is enclosed by fins, an anti-abrasion cover and a connecting anti-abrasion cover, so that low-temperature corrosion of smoke is prevented.
The installed U-shaped heating pipe absorbs heat in the communicating air duct, releases heat in the air internal inlet channel, heats the inlet air temperature of the air internal inlet channel, and prevents low-temperature corrosion of the fin preheating pipes in the first-level air preheater pipe box.
The steam-water heating pipe on the upper part heats inlet air temperature of an air inlet channel inside, so that low-temperature corrosion of a preheating pipe in a primary air preheater pipe box is prevented.
The hot air in the air internal outlet channel is sent into the air internal inlet channel through the circulating hot air pipe air inlet by the fan through the circulating hot air pipe air outlet, the inlet air temperature of the air internal inlet channel is heated, and the low-temperature corrosion of the fin preheating pipe in the first-level air preheater pipe box is prevented.
As a whole, the air preheater pipe box of the module is assembled by the preheating pipes, so that the modular production and installation are facilitated, and the design of a smoke and air system is facilitated.
Drawings
The utility model is described in further detail below with reference to the attached drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of FIG. 1 in partial cutaway;
FIG. 3 is a schematic view of the bottom air preheater channel;
FIG. 4 is a schematic structural view of an air preheater tube box;
FIG. 5 is a schematic diagram of a steam-water make-up system;
FIG. 6 is a schematic structural view of a U-shaped heating tube;
FIG. 7 is a schematic view of a wear and corrosion prevention device on a fin preheating tube;
FIG. 8 is a schematic view of a wear cover of FIG. 7;
FIG. 9 is a schematic diagram of a structure of the fin of FIG. 7;
fig. 10 is another schematic diagram of the wear prevention device on the fin preheater tube;
FIG. 11 is a schematic view of one construction of the wear shoe of FIG. 10;
fig. 12 is a schematic structural view of the elongated fin of fig. 10;
FIG. 13 is a schematic view of a U-shaped bellows expansion joint;
FIG. 14 is a schematic view of a portion of an air preheater tube box connected by a U-shaped corrugated expansion joint.
The reference numbers in the figures illustrate: the air conditioner comprises a shell 1, a communicating air box 101, an air preheater channel box 2 (2A, 2B), U-shaped heating pipes 3, a steam-water header 4, an air inlet pipeline 5, a flue gas inlet pipeline 6, a box cover 601, a flue gas outlet pipeline 7, a flue gas outlet 701, an air outlet pipeline 8, an air internal inlet channel 9, an air internal outlet channel 10, a fin preheating pipe 11, a partition plate 12, a steam-water heating pipe 13, a three-way connecting pipe 14, a U-shaped corrugated expansion joint 15, a communicating air duct 16, a fan 17, a circulating hot air pipe 18, a circulating hot air pipe air inlet 19, a circulating hot air pipe air outlet 20, an electric plugboard door 21, a water tank 22, a water supply pipe 23, a water level meter 24, a communicating valve 25, a water replenishing valve 26, a water supply valve 27, a box board 28, a tube board 29, fins 30, a hanging port 300, an anti-wear cover 31, a connecting anti-wear cover 32, an anti, The hanging opening 351.
Detailed Description
With reference to fig. 1 to 14, a finned tube air preheater, air preheater channel 2 sets up in shell 1, shell 1 upper portion is equipped with flue gas inlet pipe 6, the lower part is equipped with exhanst gas outlet pipe 7, be equipped with air inlet pipe 5 in the middle of the lower part in the shell 1 leading flank, be equipped with air outlet pipe 8 in the middle of the shell 1 leading flank upper portion, be the inside access way 9 of air in the middle of the lower part in the shell 1 inside, air preheater channel 2A is equipped with to the inside access way 9 both sides of air, be the inside exit way 10 of air in the middle of the inside upper portion of shell 1, air preheater channel 2B is equipped with to the inside exit way 10 both sides of air. The air inlet channel 9 is formed by a partition 12 above and below the air inlet channel, and the air outlet channel 10 is formed by a partition 12 above and below the air outlet channel.
The air preheater tubes 2A and 2B are composed of tube plates 29 disposed in left and right directions, box plates 28 disposed in front and rear directions, and fin preheating tubes 11 disposed in left and right directions, wherein both ends of the fin preheating tubes 11 are respectively located at the two tube plates 29, and both ends of the fin preheating tubes 11 respectively penetrate through the tube plates 29. The air preheater tube boxes 2A, 2B are divided into two rows in the left and right direction, two rows are provided in the front and rear direction, it is needless to say that a plurality of rows may be provided according to actual conditions, four layers are provided in the up and down direction, the air preheater tube boxes 2A, 2B in the up and down relationship in position are communicated with each other, and the fin preheating tubes 11 of the adjacent air preheater tube boxes 2A, 2B in the up and down relationship in position are communicated with each other through the communicating air boxes 101. The air preheater tube boxes 2A and 2B between the upper and lower parts are hermetically communicated through U-shaped corrugated expansion joints 15, and the air preheater tube boxes 2A and 2B at the positions communicated with the air boxes 101 are hermetically communicated with the shell 2 through the U-shaped corrugated expansion joints 15.
The air enters the air preheating device in the channel 9 from the inside, and the air preheating device is divided into two parts, wherein one part is as follows: one end of each of the steam-water heating pipes 13 penetrates through a partition plate 12 below an air internal inlet channel 9 and is communicated with a steam-water header 4 arranged at a flue gas outlet pipeline 7, the upper end of each of the steam-water heating pipes 13 is fixedly connected with a three-way connecting pipe 14, a water supplementing valve 26 and a water supply valve 27 are arranged on each water supply pipe 23, one end of each water supply pipe 23 is communicated with the water tank 22, the other end of each water supply pipe 23 is communicated with the steam-water header 4, a water level meter 24 is arranged on each water tank 22, and each water level meter; one part is as follows: a plurality of U-shaped heating pipes 3, and a plurality of U-shaped heating pipes 3 pass through an upper partition plate 12 of the air internal inlet passage 9.
The middle inside the shell 1 is provided with a communicating air duct 16, the upper side of the communicating air duct 16 is a partition plate 12 below the air internal outlet channel 10, the lower side of the communicating air duct 16 is a partition plate 12 above the air internal inlet channel 9, the left side and the right side of the communicating air duct 16 are second and third layers of air preheater tube boxes 2B, one part of the U-shaped heating tube 3 is located in the communicating air duct 16, and the other part of the U-shaped heating tube is located in the air internal inlet channel 9.
The outer part of the shell 1 is provided with a hot air recirculation system consisting of a fan 17 and a circulating hot air pipe 18, one end of the circulating hot air pipe 18 is a circulating hot air pipe air inlet 19, and the other end is a circulating hot air pipe air outlet 20. The circulating hot air pipe air inlet 19 is communicated with the air internal outlet channel 10 through the air outlet pipeline 8, the circulating hot air pipe air outlet 20 is communicated with the air internal inlet channel 9 through the air inlet pipeline 5, the circulating hot air pipe air inlet 19 is provided with an electric spile door 21, and the electric spile door is an electromechanical control switch door for switching the circulating hot air pipe air inlet 19.
The anti-abrasion and anti-corrosion device on the fin preheating pipe 11 in the air preheater pipe box 2A on two sides of the air internal inlet channel 9 comprises fins 30, an anti-abrasion cover 31 and a connecting anti-abrasion cover 32, wherein the fins 30 are arranged on two sides of the fin preheating pipe 11 along the fin preheating pipe 11 and can be symmetrically arranged, a hanging port 300 is arranged on each fin 30, the anti-abrasion cover 31 is C-shaped, the anti-abrasion covers 31 are respectively buckled between the two fins 30 on the outer side of the fin preheating pipe 11, the fins 30 are fixedly connected with the anti-abrasion cover 32 through the hanging ports 300, a special connecting lug can be arranged on the connecting anti-abrasion cover 32 and hung into the hanging port 300 by the connecting lug or can be directly welded, the arc-shaped side of the connecting anti-abrasion cover 32 is buckled on the side edges of the two anti-abrasion covers 31, and the connecting anti-abrasion cover.
The anti-abrasion and anti-corrosion device on the fin preheating pipe 11 in the air preheater pipe box 2B on two sides of the air internal outlet channel 10 is a long strip fin 35, an anti-abrasion tile 33 and a connecting anti-abrasion tile 34, the long strip fin 35 penetrates through the fin preheating pipe 11, two sides of the long strip fin 35 are exposed outside the fin preheating pipe 11, hanging openings 351 are formed in two outer edges of the long strip fin 35, the anti-abrasion tile 33 is buckled on the fin preheating pipe 11, the long strip fin 35 is fixedly connected with the anti-abrasion tile 34 through the hanging openings 351, and one side of the connecting anti-abrasion tile 34 is buckled on the side edges of the two anti-abrasion tiles 33.
The fin 30, the wear-resistant cover 31, the connecting wear-resistant cover 32, the strip fin 35, the wear-resistant tile 33 and the connecting wear-resistant tile 34 can be made of corrosion-resistant and high-temperature-resistant materials, such as alloy plates containing rare earth elements.
In the working process, high-temperature flue gas enters the box cover 601 through the flue gas inlet pipeline 6, then sequentially enters the air preheater tube boxes 2B and 2A on the fourth layer, the third layer, the second layer and the bottom layer from top to bottom, namely gaps among the fin preheating tubes 11 in the air preheater tube boxes 2B and 2A are also formed, the air preheater tube boxes 2B and 2A are hermetically connected through the U-shaped corrugated expansion joints 15, the flue gas is prevented from leaking, and the flue gas flows out from the flue gas outlet 701 of the flue gas outlet pipeline 7 and enters other components. Air passes from the air inlet pipe 5 to the air inlet passage 9 from the air inlet pipe 5, enters the fin preheating pipes 11 of the first layer of air preheater pipe box 2A, then enters the fin preheating pipes 11 in the second layer of air preheater pipe box 2B through the lower communicating bellows 101 at one side of the shell 1 and enters the communicating duct 16, hot air in the communicating duct 16 enters the fin preheating pipes 11 of the third layer of air preheater pipe 2B, then enters the fin preheating pipes 11 in the fourth layer of air preheater pipe box 2B through the communicating bellows 101 at one side of the shell 1, and finally enters the air inner outlet passage 10 and flows out through the air outlet pipe 8. In the whole process, the hot air flows from top to bottom, the air flows from bottom to top, the hot air and the hot air are exchanged in the air preheater pipe boxes 2A and 2B, and the air is heated.
In the process, the wear-resistant tile 33 on the long-strip fin 35 on the fin preheating pipe 11 in the second to fourth layers of air preheater pipelines 2B and the connecting wear-resistant tile 34 can block the scouring and frictional corrosion of high-temperature flue gas, reduce the wear corrosion to the fin preheating pipe 11, and simultaneously, the long-strip fin 35 can better heat the air in the fin preheating pipe 11 as penetrating through the fin preheating pipe 11; the wear-resistant cover 31 and the connecting wear-resistant cover 32 on the fins 30 on the fin preheating pipe 11 in the first-layer air preheater pipe box 2A can prevent the high-temperature flue gas from scouring and wearing the preheating pipe 11 and can also prevent the flue gas from contacting the low-temperature preheating pipe wall to cause low-temperature flue gas corrosion.
In the working process, in order to preheat the air entering the air inner entering channel 9 and reduce the corrosion influence of cold air on the fin preheating pipe 11, water in the steam-water heating pipe 13 is heated through the flue gas outlet pipeline 7, then the water becomes steam and rises, the steam on the upper part of the steam-water heating pipe 13 heats the pipe wall, the pipe wall preheats the air entering the air inner entering channel 9, and the arranged three-way connecting pipe 14 is more beneficial to the emission of hot gas conduction. The U-shaped heating pipe 3 transfers heat in the communicating air duct 16 to the air internal inlet passage 9. The water in the steam-water heating pipe 13 is adjusted according to the water level gauge 24, and certainly, an air leakage pipe is led out of the three-way connecting pipe 14, so that the steam-water heating pipe 13 can be supplemented with water conveniently. The water replenishing valve 26 and the water supplying valve 27 arranged on the water inlet pipe 23 are convenient for replenishing and releasing water, and the system is convenient to maintain after releasing.
In addition, the fan 17 can also circulate the hot air in the air internal outlet channel 10 to the air internal inlet channel 9 through the circulating hot air pipe 18, so as to further preheat and heat the air in the air internal inlet channel 9, thereby reducing the corrosion influence of the cold air on the fin preheating pipe 11. The electric inserting plate door 21 arranged at the air inlet 19 of the circulating hot air pipe can be electrically controlled, and is convenient to operate and automatically adjusted. The soot dust which is floated and accumulated on the fin preheating pipes 11 in the pipeline of the air preheater after the air preheater works for a section can be blown by the soot blowers arranged on each layer of the empty preheater pipe box 2, so that the soot dust is blown off. The soot blower is a common air soot blower or a steam soot blower which is composed of a soot blowing pipe, an operation valve and the like, and a soot blowing nozzle of the soot blower arranged on each layer of the hollow preheater pipe box 2 jets high-pressure gas or high-pressure steam to the fin preheating pipe 11 at a high speed to achieve the effect of clearing accumulated dust.
Claims (10)
1. The utility model provides a fin tubular air heater, includes shell (1), is provided with air heater pipe case (2A, 2B) in shell (1), its characterized in that: the smoke inlet and outlet pipelines are arranged on the upper and lower sides of the shell (1), an air inlet pipeline (5) is arranged in the middle of the middle lower part of the side surface of the shell (1), an air outlet pipeline (8) is arranged in the middle of the upper part of the side surface of the shell (1), an air internal inlet channel (9) is arranged in the middle of the middle lower part in the shell (1), air preheater pipe boxes (2A) are arranged on two sides of the air internal inlet channel (9), an air internal outlet channel (10) is arranged in the middle of the upper part in the shell (1), and air preheater pipe boxes (2B) are arranged on two; the air preheater tube boxes (2A, 2B) comprise fin preheating tubes (11), the fin preheating tubes (11) are provided with anti-abrasion and anti-corrosion devices, the upper and lower adjacent air preheater tube boxes (2A, 2B) are communicated with each other, and the fin preheating tubes (11) of the upper and lower adjacent air preheater tube boxes (2A, 2B) are communicated with each other; the upper part and the lower part of the air internal inlet channel (9) are respectively provided with a clapboard (12), the upper part and the lower part of the air internal outlet channel (10) are respectively provided with a clapboard (12), and the air internal inlet channel (9) is internally provided with an air preheating device.
2. A finned tube air preheater as set forth in claim 1, wherein: the flue gas import and export pipeline include set up in flue gas import pipeline (6) on shell (1) upper portion and set up in flue gas outlet pipe way (7) of shell (1) lower part, air preheating device includes a plurality of soda heating pipe (13), below baffle (12) that a plurality of soda heating pipe (13) one end passed the inside access way of air (9) and communicate in installing soda collection box (4) of flue gas outlet pipe way (7) department, soda collection box (4) intercommunication soda makeup water system.
3. A finned tube air preheater as set forth in claim 2, wherein: the steam-water supply system comprises a water tank (22), a water supply pipe (23), a water level meter (24), a communication valve (25), a water supply valve (26) and a water supply valve (27), wherein the water supply pipe (23) is provided with the water supply valve (26) and the water supply valve (27), one end of the water supply pipe (23) is communicated with the water tank (22), the other end of the water supply pipe is communicated with a steam-water header (4), the water tank (22) is provided with the water level meter (24), and the water level meter (24) is communicated with the water tank (22) through the communication valve (25.
4. A finned tube air preheater as set forth in claim 1, wherein: the air preheating device comprises a plurality of U-shaped heating pipes (3), and the plurality of U-shaped heating pipes (3) penetrate through an upper partition plate (12) of the air internal inlet channel (9).
5. A finned tube air preheater according to claim 4, wherein: the utility model discloses a heat exchanger, including shell (1), upside in the middle of the inside of shell (1) is intercommunication wind channel (16), and the upside in intercommunication wind channel (16) is baffle (12) of inside export passageway (10) below of air, and the downside is baffle (12) of inside access way of air (9) top, partly be located intercommunication wind channel (16) of U type heating pipe (3), partly be located inside access way of air (9).
6. A finned tube air preheater as set forth in claim 1, wherein: the outside of shell (1) still is provided with hot air recirculation system, hot air recirculation system includes fan (17) and circulation hot-blast main (18), and fan (17) is connected in circulation hot-blast main (18), and circulation hot-blast main wind entry (19) pass through air outlet pipeline (8) intercommunication air inside outlet passage (10), and circulation hot-blast main wind export (20) are through air admission pipeline (5) intercommunication air inside inlet passage (9), and circulation hot-blast main wind entry (19) department is provided with electronic picture peg door (21).
7. A finned tube air preheater as set forth in claim 1, wherein: the air preheater tube box (2A, 2B) comprises a plurality of fin preheating tubes (11) arranged side by side, box plates (28) and tube plates (29), the box plates (28) are symmetrically arranged front and back, the tube plates (29) are symmetrically arranged left and right, the fin preheating tubes (11) are arranged in the space enclosed by the box plates (28) and the tube plates (29) in the left and right direction, and two ends of the fin preheating tubes (11) are respectively and correspondingly located at the two tube plates (29) and respectively penetrate through the tube plates (29).
8. A finned tube air preheater as set forth in claim 1, wherein: divide into two rows about air heater pipe case (2A, 2B), set up more than two lines in the fore-and-aft direction, set up more than the three-layer on the upper and lower direction, through U-shaped ripple expansion joint (15) sealing connection between adjacent air heater pipe case (2A, 2B), the outside of shell (1) is provided with intercommunication bellows (101), and fin preheating tube (11) one end of air heater pipe case (2A, 2B) is through intercommunication bellows (101) intercommunication.
9. A finned tube air preheater as set forth in claim 1, wherein: the anti-abrasion and anti-corrosion device on the fin preheating pipe (11) in the air preheater pipe box (2A) on two sides of the air internal inlet channel (9) comprises fins (30), an anti-abrasion cover (31) and a connecting anti-abrasion cover (32), the fins (30) are arranged on two sides of the fin preheating pipe (11), a hanging connector (300) is arranged on each fin (30), the anti-abrasion cover (31) is C-shaped, the anti-abrasion covers (31) are respectively buckled between the two fins (30) on the outer side of the fin preheating pipe (11), the fins (30) are fixedly connected with the anti-abrasion cover (31) through the hanging connector (300), and the arc-shaped side of the connecting anti-abrasion cover (31) is buckled on the side edges of the two anti-abrasion covers (31).
10. A finned tube air preheater as set forth in claim 1, wherein: the anti-abrasion and anti-corrosion device on the fin preheating pipe (11) in the air preheater pipe box (2B) on two sides of the air internal outlet channel (10) comprises strip fins (35), anti-abrasion tiles (33) and connecting anti-abrasion tiles (34), wherein the strip fins (35) penetrate through the fin preheating pipe (11) and two sides of the strip fins (35) are exposed outside the fin preheating pipe (11), hanging openings (321) are formed in two outer edges of the strip fins (35), the anti-abrasion tiles (33) are buckled on the fin preheating pipe (11), the strip fins (35) are fixedly connected with the anti-abrasion tiles (34) through the hanging openings (351), and one side of the connecting anti-abrasion tiles (34) is buckled on the side edges of the two anti-abrasion tiles (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921626548.1U CN211739155U (en) | 2019-09-25 | 2019-09-25 | Fin tubular air preheater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921626548.1U CN211739155U (en) | 2019-09-25 | 2019-09-25 | Fin tubular air preheater |
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| CN211739155U true CN211739155U (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513716A (en) * | 2019-09-25 | 2019-11-29 | 杨学让 | A kind of fin tubular air preheater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513716A (en) * | 2019-09-25 | 2019-11-29 | 杨学让 | A kind of fin tubular air preheater |
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