CN114576643B - Flue gas preheater with smoke dust purging device - Google Patents

Flue gas preheater with smoke dust purging device Download PDF

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Publication number
CN114576643B
CN114576643B CN202210186648.7A CN202210186648A CN114576643B CN 114576643 B CN114576643 B CN 114576643B CN 202210186648 A CN202210186648 A CN 202210186648A CN 114576643 B CN114576643 B CN 114576643B
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CN
China
Prior art keywords
pipe
smoke
flue gas
gas preheater
printing
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Active
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CN202210186648.7A
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Chinese (zh)
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CN114576643A (en
Inventor
商少华
赵乃闯
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Beijing Relizhongda Heat Exchange Equipment Co ltd
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Beijing Relizhongda Heat Exchange Equipment Co ltd
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Priority to CN202210186648.7A priority Critical patent/CN114576643B/en
Publication of CN114576643A publication Critical patent/CN114576643A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/36—Water and air preheating systems
    • F22D1/38—Constructional features of water and air preheating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/003—Control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/04—Feeding and driving arrangements, e.g. power operation
    • F28G15/06—Automatic reversing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)

Abstract

The application discloses a flue gas preheater with a smoke dust purging device, which comprises a strip-shaped printing mold, wherein a pressure pipe cavity is arranged in the printing mold; the upper end surface of the printing mould is provided with a plurality of strip-shaped printing matrices, one end of each printing matrix is a printing surface, the printing matrices penetrate through the upper end surface of the printing mould, and the printing surfaces are positioned on the inner wall of the pressure pipe cavity; the length extension direction of the pressure pipe cavity is parallel to the length extension direction of the printing mold, and openings at two ends of the pressure pipe cavity are respectively arranged on end faces at two ends of the printing mold; and a pressing plate is arranged on the upper end surface of the printing mold and is in pressing contact with one end, far away from the printing surface, of the printing matrix. According to the technical scheme, the marking information can be printed on the surface of the rubber tube, and the printed marking information is firm, clear in handwriting and not easy to fall off.

Description

Flue gas preheater with smoke dust purging device
Technical Field
The invention relates to a flue gas preheater with a smoke dust purging device, and belongs to the field of boiler equipment.
Background
The combustion-supporting air of various combustion equipment directly absorbs external cold air which is not beneficial to combustion and can consume certain heat energy, particularly when low-calorific-value fuel is used, the temperature cannot meet the use requirement and the energy-saving effect cannot be achieved, and the flue gas of the combustion equipment generally contains a large amount of heat energy which is wasted if not used. Therefore, in the prior art, the combustion equipment can be provided with the flue gas preheater, the flue gas is used for preheating air and water, and the heat of the flue gas is recovered, so that the energy utilization rate of the heat energy is greatly improved. Contain a large amount of burning ash, dust in the flue gas, at the heat exchange process that the flue gas preheats, the dust in the flue gas can subside the bottom in the flue gas preheater stove outer covering, and the dust accumulation of bottom in the flue gas preheater stove outer covering is too thick, can influence flue gas preheater's work efficiency, so will regularly clear up. The cleaning of the dust at the bottom in the furnace shell of the flue gas preheater needs manual cleaning after the shutdown of the flue gas preheater, which wastes time and energy and affects the working efficiency of the flue gas preheater.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the flue gas preheater with the smoke dust blowing device, which can automatically blow on line without stopping, and reduces the problem of low heat exchange efficiency caused by excessive dust deposition.
The invention adopts the technical scheme that the smoke preheater with the smoke sweeping device comprises a smoke preheater furnace shell, wherein a plurality of heat exchange tubes are arranged in the smoke preheater furnace shell at intervals; a smoke dust sweeping device is arranged at the bottom in the furnace shell of the smoke preheater; the smoke dust purging device comprises an air inlet pipe, a transition chamber and a plurality of flow dividing pipes, wherein an air inlet of the transition chamber is communicated with the air inlet pipe, the flow dividing pipes are arranged at the bottom end inside the furnace shell of the smoke preheater and positioned between two adjacent heat exchange pipes, and the end parts of the flow dividing pipes are communicated with the inside of the transition chamber; the high-pressure spray heads are arranged on the flow dividing pipes and communicated with the interior of the flow dividing pipes.
Preferably, the gas inlet pipe of the flue gas preheater with the smoke dust blowing device is connected with an air compressor, and the control end of the air compressor is connected with a controller; and a plurality of high-temperature pressure sensing devices are arranged on the shunt pipe, and the signal output ends of the high-temperature pressure sensing devices are electrically connected with the signal input end of the controller.
Preferably, the smoke preheater with the smoke dust blowing device is characterized in that an inner rotating pipe is sleeved in the shunt pipe, and the inner rotating pipe and the shunt pipe are coaxially arranged and rotate relative to each other; one end of the high-pressure spray head is fixed with the internal rotating pipe and is communicated with the inside of the internal rotating pipe; the surface of the shunt pipe is provided with a plurality of rotating grooves, and the high-pressure spray head penetrates through the rotating grooves and slides in the rotating grooves.
Preferably, in the flue gas preheater with the smoke dust blowing device, the middle section of the flow dividing pipe is provided with a bend, and the bent part of the middle section of the flow dividing pipe is provided with a communicating cavity; the inner rotating pipe is provided with a communicating port, the inner rotating pipe is communicated with the communicating cavity through the communicating port, and the communicating cavity is communicated with the transition chamber.
Preferably, one end of the internal rotating pipe penetrates through the side wall of the bent part of the middle section of the flow dividing pipe and is connected with a reciprocating rotation power mechanism; and a rotary sealing ring is arranged on the side wall of the bending part of the middle section of the flow dividing pipe, and the inner rotary pipe is rotationally sealed with the flow dividing pipe through the rotary sealing ring.
Preferably, the reciprocating rotation power mechanism of the flue gas preheater with the smoke dust purging device comprises a shell, and a middle rack, a driving motor, a driving gear and a plurality of driven gear rings are arranged in the shell; a driven gear ring is fixedly sleeved at the end part of the inner rotating pipe, and driving teeth are respectively arranged on two sides of the middle rack in the length extending direction; a power shaft of the driving gear is in transmission connection with a power output end of the driving motor, the driving gear is meshed with driving teeth on one side of the middle rack, and all driven gear rings are meshed with driving teeth on the other side of the middle rack; and two ends of the middle rack are respectively sleeved with a sliding limiting ring, and the sliding limiting rings are fixed in the shell of the reciprocating rotation power mechanism.
Preferably, the reciprocating rotation power mechanism of the flue gas preheater with the smoke dust purging device comprises a shell, and a middle rack, a driving motor, a reciprocating driving swing rod, a main driving wheel and a plurality of driven gear rings are arranged in the shell; one end of the reciprocating driving swing rod is provided with an active driving gear ring, the other end of the reciprocating driving swing rod is provided with a driving groove, and the driving groove is a strip-shaped groove and is arranged along the length extension direction of the reciprocating driving swing rod;
the end part of each internal rotating pipe is fixedly sleeved with a driven gear ring, and the two sides of the middle rack in the length extension direction are provided with driving teeth respectively; the driving gear ring at the end part of the reciprocating driving swing rod is meshed with the driving gear at one side of the middle rack, and all the driven gear rings are meshed with the driving gear at the other side of the middle rack;
the main driving wheel is fixedly sleeved at the power output shaft end of the driving motor; the main driving wheel is provided with a driving head, and the driving head is arranged in the driving groove and is in sliding fit with the driving groove.
Preferably, the shell of the flue gas preheater with the smoke dust purging device is also provided with an inverted T-shaped support piece, two ends of the middle rack are respectively sleeved with a sliding limiting ring, and the sliding limiting rings are fixed on the support piece; the oscillating shaft of the reciprocating drive oscillating bar is positioned between the drive groove and the driving drive gear ring, and the shaft end of the oscillating shaft of the reciprocating drive oscillating bar is rotatably connected with the support piece.
Preferably, in the flue gas preheater with the smoke dust purging device, the high-pressure nozzle is an L-shaped bent pipe, one end of the high-pressure nozzle is connected with the inner rotating pipe, and the other end of the high-pressure nozzle is inclined and faces to the bottom end face of the inner bottom of the furnace shell of the flue gas preheater.
Preferably, the smoke preheater with the smoke purging devices is characterized in that two groups of smoke purging devices are arranged at the bottom in the furnace shell of the smoke preheater, the two groups of smoke purging devices are respectively arranged at two sides of the bottom in the furnace shell of the smoke preheater, and the air outlet directions of the high-pressure nozzles of the two groups of smoke purging devices are opposite.
The application has the advantages that:
in the technical scheme of this application, admit air through the intake pipe to distribute highly-compressed air to each shunt tubes through transition room, finally blow out highly-compressed air through high pressure nozzle, sweep the sedimentary dust of bottom in the flue gas preheater stove outer covering. The scheme of this application can realize sweeping on line, and the bottom deposit's dust is too much in the flue gas preheater, can sweep at any time, need not to shut down, has guaranteed flue gas preheater's operating efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is an enlarged view of FIG. 1 at B;
FIG. 5 is a schematic view of the gas supply structure of the shunt tube;
fig. 6 is a schematic structural view of a mechanism for reciprocating rotational power according to embodiment 1;
fig. 7 is a schematic structural view of the mechanism for reciprocating rotational power according to embodiment 2.
Detailed Description
The technical features of the invention are further explained in the following with reference to the accompanying drawings and specific embodiments.
The flue gas preheater with the smoke dust blowing device in the embodiment comprises a flue gas preheater furnace shell 1, wherein a plurality of heat exchange tubes 2 are arranged in the flue gas preheater furnace shell 1, and the heat exchange tubes 2 are arranged at intervals; a smoke dust blowing device is arranged at the bottom in the furnace shell 1 of the smoke preheater; the smoke dust purging device comprises an air inlet pipe 3, a transition chamber 4 and a plurality of flow dividing pipes 5, wherein an air inlet of the transition chamber 4 is communicated with the air inlet pipe 3, the flow dividing pipes 5 are arranged at the bottom end inside the furnace shell 1 of the smoke preheater and positioned between two adjacent heat exchange pipes 2, and the end parts of the flow dividing pipes 5 are communicated with the inside of the transition chamber 4; the shunt pipe 5 is provided with a plurality of high-pressure nozzles 6, and the high-pressure nozzles 6 are communicated with the interior of the shunt pipe 5. The air inlet pipe 3 is connected with an air compressor 7, and the control end of the air compressor 7 is connected with a controller 16; the shunt pipe 5 is provided with a plurality of high-temperature pressure sensing devices 8, and the signal output ends of the high-temperature pressure sensing devices 8 are electrically connected with the signal input end of the controller 16.
In this embodiment, the air is fed through the air inlet pipe 3, and the high-pressure air is distributed to each shunt pipe 5 through the transition chamber 4, and finally the high-pressure air is sprayed out through the high-pressure spray head 6, so as to sweep the dust deposited at the bottom in the furnace shell 1 of the flue gas preheater. The scheme of this application can realize sweeping on line, and the bottom deposit's dust is too much in the flue gas preheater, can sweep at any time, need not to shut down, has guaranteed flue gas preheater's operating efficiency.
The high-temperature pressure sensing device 8 can sense the thickness of deposited ash, when the pressure sensed by the high-temperature pressure sensing device 8 is too high, the thickness of the deposited ash on the surface of the high-temperature pressure sensing device 8 is indicated to be too thick, and the high-temperature pressure sensing device 8 outputs a control signal to start purging, so that automatic control is realized. An observation window can be arranged, manual observation and timely cleaning are facilitated, the observation window is arranged at any position, so that observation is facilitated as a criterion, and the observation window can be arranged on the wall of the flue gas preheater. The high-temperature pressure sensors 8 can be arranged at the bottom in the flue gas preheater or on the shunt tubes 5, and the specific quantity and distribution are carried out according to actual detection requirements.
An inner rotating pipe 9 is sleeved in the shunt pipe 5, and the inner rotating pipe 9 and the shunt pipe 5 are coaxially arranged and rotate relative to the shunt pipe 5; one end of the high-pressure nozzle 6 is fixed with the inner rotating pipe 9 and is communicated with the inside of the inner rotating pipe 9; the surface of the shunt pipe 5 is provided with a plurality of rotating grooves 17, and the high-pressure spray head 6 penetrates through the rotating grooves 17 and slides in the rotating grooves 17.
The high-pressure spray head 6 is driven to swing through the inner rotating pipe 9, different areas can be swept in the swing process of the high-pressure spray head 6, the sweeping range is expanded, and the bottom ash removal effect in the flue gas preheater is improved.
A bend is arranged at the middle section of the flow dividing pipe 5, and a communicating cavity 5-1 is arranged at the bend position of the middle section of the flow dividing pipe 5; the inner rotating pipe 9 is provided with a communicating opening 9-1, the inside of the inner rotating pipe 9 is communicated with a communicating cavity 5-1 through the communicating opening 9-1, and the communicating cavity 5-1 is communicated with the transition chamber 4.
Compressed air enters the communicating opening 9-1 from the communicating cavity 5-1 of the shunt tube 5 and enters the inner rotating tube 9, so that the inner rotating tube 9 and the shunt tube 5 are rotated and communicated, and the inner rotating tube 9 can effectively supply air in the rotation process.
One end of the internal rotating pipe 9 penetrates through the side wall of the bending part of the middle section of the shunt pipe 5 and is connected with a reciprocating rotating power mechanism 18; and a rotary sealing ring is arranged on the side wall of the bending part of the middle section of the shunt pipe 5, and the inner rotary pipe 9 is rotationally sealed with the shunt pipe 5 through the rotary sealing ring.
The reciprocating rotation power mechanism 18 comprises a shell, and a middle rack 10, a driving motor 11, a driving gear 12 and a plurality of driven gear rings 13 are arranged in the shell; the end part of the inner rotating pipe 9 is fixedly sleeved with a driven gear ring 13, and two sides of the middle rack 10 in the length extension direction are respectively provided with a driving gear; a power shaft of the driving gear 12 is in transmission connection with a power output end of the driving motor 11, the driving gear 12 is meshed with driving teeth on one side of the middle rack 10, and all the driven gear rings 13 are meshed with driving teeth on the other side of the middle rack 10; two ends of the middle rack 10 are respectively sleeved with a sliding limiting ring 14, and the sliding limiting ring 14 is fixed in a shell of a reciprocating rotation power mechanism 18.
The internal rotating pipe 9 is driven to rotate in a reciprocating mode through the reciprocating rotation power mechanism 18, so that the high-pressure spray head 6 swings in a certain range, and the full-range uniform blowing of the bottom in the flue gas preheater is achieved. The driving motor 11 adopts a stepping motor and is provided with an encoder to control the rotation angle of the driving motor 11, so that the control accuracy of the swing range of the high-pressure spray head 6 is ensured.
The high-pressure spray nozzle 6 is an L-shaped bent pipe, one end of the high-pressure spray nozzle 6 is connected with the inner rotating pipe 9, and the other end of the high-pressure spray nozzle 6 inclines and faces to the bottom end face of the inner bottom of the furnace shell 1 of the flue gas preheater.
The L-shaped bent pipe is used as a high-pressure spray head, the end part of the L-shaped bent pipe can be inclined downwards to sweep the bottom end face in the furnace shell 1 of the flue gas preheater, and the sweeping efficiency of compressed air is guaranteed.
The bottom in the flue gas preheater stove outer covering 1 is provided with two sets of smoke and dust and sweeps the device, and two sets of smoke and dust sweep the device and set up respectively in the both sides of bottom in the flue gas preheater stove outer covering 1, and the direction of giving vent to anger of two sets of smoke and dust sweep the high pressure nozzle 6 of device sets up relatively. In this embodiment, can set up two sets of smoke and dust and sweep the device, two sets of smoke and dust sweep the device and sweep relatively, work in turn, improve and sweep the effect.
Example 2
This embodiment differs from the embodiment in that: the reciprocating rotation power mechanism 18 comprises a shell, wherein a middle rack 10, a driving motor 11, a reciprocating driving swing rod 12-1, a main driving wheel 14-1 and a plurality of driven gear rings 13 are arranged in the shell; one end of the reciprocating drive swing rod 12-1 is provided with an active drive gear ring 12-2, the other end of the reciprocating drive swing rod 12-1 is provided with a drive groove 12-3, and the drive groove 12-3 is a strip-shaped groove and is arranged along the length extension direction of the reciprocating drive swing rod 12-1;
the end part of each internal rotating pipe 9 is fixedly sleeved with a driven gear ring 13, and the two sides of the middle rack 10 in the length extension direction are provided with driving teeth; the driving gear ring 12-2 at the end part of the reciprocating driving swing rod 12-1 is meshed with the driving teeth at one side of the middle rack 10, and all the driven gear rings 13 are meshed with the driving teeth at the other side of the middle rack 10;
the main driving wheel 14-1 is fixedly sleeved at the power output shaft end of the driving motor 11; the main driving wheel 14-1 is eccentrically provided with a driving head which is arranged in the driving groove 12-3 and is in sliding fit with the driving groove 12-3.
In this embodiment, the reciprocating swing mechanism is adopted to control the reciprocating rotation of the inner rotating tube 9, the reciprocating swing can be realized without the need of the driving motor to perform forward rotation and reverse rotation conversion, the motion continuity is high, and the service life of the driving motor 11 can be effectively prolonged.
The shell is also provided with an inverted T-shaped support piece 15, two ends of the middle rack 10 are respectively sleeved with a sliding limiting ring 14, and the sliding limiting rings 14 are fixed on the support piece 15; the oscillating shaft 12-4 of the reciprocating drive oscillating bar 12-1 is positioned between the driving groove 12-3 and the driving drive gear ring 12-2, the shaft end of the oscillating shaft 12-4 of the reciprocating drive oscillating bar 12-1 is rotatably connected with the supporting piece 15, and the reciprocating drive oscillating bar 12-1 can oscillate around the rotation center of the oscillating shaft 12-4.
It will be understood that the present invention is not limited to the above description, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the invention may be made by those skilled in the art.

Claims (5)

1. A flue gas preheater with a smoke dust sweeping device comprises a flue gas preheater furnace shell (1), wherein a plurality of heat exchange tubes (2) are arranged in the flue gas preheater furnace shell (1), and the heat exchange tubes (2) are arranged at intervals; the method is characterized in that: a smoke dust sweeping device is arranged at the bottom in the furnace shell (1) of the smoke preheater; the smoke dust purging device comprises an air inlet pipe (3), a transition chamber (4) and a plurality of flow dividing pipes (5), wherein an air inlet of the transition chamber (4) is communicated with the air inlet pipe (3), the flow dividing pipes (5) are arranged at the bottom end inside the furnace shell (1) of the smoke preheater and positioned between two adjacent heat exchange pipes (2), and the end parts of the flow dividing pipes (5) are communicated with the interior of the transition chamber (4); a plurality of high-pressure nozzles (6) are arranged on the shunt pipe (5),
an inner rotating pipe (9) is sleeved in the shunt pipe (5), and the inner rotating pipe (9) and the shunt pipe (5) are coaxially arranged and rotate relative to the shunt pipe (5); the high-pressure spray head (6) is an L-shaped bent pipe, one end of the high-pressure spray head (6) is fixed with the inner rotating pipe (9) and is communicated with the inside of the inner rotating pipe (9), and the other end of the high-pressure spray head (6) is inclined and faces to the bottom end face of the inner bottom of the smoke preheater furnace shell (1); a plurality of rotating grooves (17) are arranged on the surface of the shunt pipe (5), the high-pressure spray head (6) passes through the rotating grooves (17) and slides in the rotating grooves (17),
a bend is arranged at the middle section of the flow dividing pipe (5), and a communicating cavity (5-1) is arranged at the bend position of the middle section of the flow dividing pipe (5); the inner rotating pipe (9) is provided with a communicating opening (9-1), the inner part of the inner rotating pipe (9) is communicated with a communicating cavity (5-1) through the communicating opening (9-1), and the communicating cavity (5-1) is communicated with the transition chamber (4).
2. A flue gas preheater with a smoke purge as set forth in claim 1, wherein: the air inlet pipe (3) is connected with an air compressor (7), and the control end of the air compressor (7) is connected with a controller (16); the shunt pipe (5) is provided with a plurality of high-temperature pressure sensing devices (8), and the signal output ends of the high-temperature pressure sensing devices (8) are electrically connected with the signal input end of the controller (16).
3. A flue gas preheater with a smoke purge as set forth in claim 1, wherein: one end of the internal rotating pipe (9) penetrates through the side wall of the bending part of the middle section of the flow distribution pipe (5) and is connected with a reciprocating rotation power mechanism (18); the side wall of the bending part of the middle section of the shunt pipe (5) is provided with a rotary sealing ring, and the inner rotary pipe (9) is rotationally sealed with the shunt pipe (5) through the rotary sealing ring.
4. A flue gas preheater with a smoke purge device as set forth in claim 3, wherein: the reciprocating rotation power mechanism (18) comprises a shell, and a middle rack (10), a driving motor (11), a driving gear (12) and a plurality of driven gear rings (13) are arranged in the shell; a driven gear ring (13) is fixedly sleeved at the end part of the inner rotating pipe (9), and driving teeth are respectively arranged on two sides of the middle rack (10) in the length extension direction; a power shaft of the driving gear (12) is in transmission connection with a power output end of the driving motor (11), the driving gear (12) is meshed with driving teeth on one side of the middle rack (10), and all driven gear rings (13) are meshed with driving teeth on the other side of the middle rack (10); and two ends of the middle rack (10) are respectively sleeved with a sliding limiting ring (14), and the sliding limiting ring (14) is fixed in a shell of a reciprocating rotation power mechanism (18).
5. A flue gas preheater with a smoke purge as set forth in claim 1, wherein: the bottom in the flue gas preheater stove outer covering (1) is provided with two sets of smoke and dust purging devices, the two sets of smoke and dust purging devices are respectively arranged on two sides of the bottom in the flue gas preheater stove outer covering (1), and the air outlet directions of the high-pressure spray heads (6) of the two sets of smoke and dust purging devices are opposite.
CN202210186648.7A 2022-02-28 2022-02-28 Flue gas preheater with smoke dust purging device Active CN114576643B (en)

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CN202210186648.7A CN114576643B (en) 2022-02-28 2022-02-28 Flue gas preheater with smoke dust purging device

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CN114576643B true CN114576643B (en) 2022-09-20

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