CN117109357A - Online high-pressure steam automatic cleaning device of air preheater - Google Patents

Online high-pressure steam automatic cleaning device of air preheater Download PDF

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Publication number
CN117109357A
CN117109357A CN202311006322.2A CN202311006322A CN117109357A CN 117109357 A CN117109357 A CN 117109357A CN 202311006322 A CN202311006322 A CN 202311006322A CN 117109357 A CN117109357 A CN 117109357A
Authority
CN
China
Prior art keywords
pipe
fixed
steam
air preheater
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311006322.2A
Other languages
Chinese (zh)
Inventor
袁福计
盖科成
曹昱冲
梁红超
朱红伟
张斐
吕中
石天军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Pingliang Power Generation Co Ltd
Original Assignee
Huaneng Pingliang Power Generation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Pingliang Power Generation Co Ltd filed Critical Huaneng Pingliang Power Generation Co Ltd
Priority to CN202311006322.2A priority Critical patent/CN117109357A/en
Publication of CN117109357A publication Critical patent/CN117109357A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • 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
    • 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
    • F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
    • F28G13/005—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00 cleaning by increasing the temperature of heat exchange surfaces
    • 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
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Abstract

The application relates to the technical field of cleaning of air pre-heaters, and particularly discloses an online high-pressure steam automatic cleaning device of an air pre-heater, which comprises a frame mechanism: the device is arranged at the cold end flue side of the flue gas side of the three-compartment air preheater; steam delivery mechanism: one end of the steam pipe connector is communicated with the steam pipe connector and is arranged at the outer side of the fan-shaped outer frame and used for outputting high-temperature steam into the steam-liquid main pipe; nozzle mechanism: the device comprises a nozzle assembly arranged on a nozzle connecting head and a booster gauge assembly arranged inside the nozzle assembly; a water filtering mechanism: the device is communicated with the bottom of the water pipe connector and is used for filtering an introduced water source, the hardened deposited ash in the gaps between the corrugated plates is softened through high-pressure high-temperature steam, the adhesiveness of the deposited ash is reduced, and meanwhile, the cleaning force of the air preheater is improved by being matched with clear water flushing; the nozzle mechanism has normal pressure and high pressure modes, the water flow speed is prevented by changing the pipe diameter, high-pressure water flow is formed, and the flushing efficiency of the air preheater can be improved by utilizing the impact of the high-pressure water flow.

Description

Online high-pressure steam automatic cleaning device of air preheater
Technical Field
The application relates to the technical field of cleaning of air pre-heaters, and particularly discloses an online high-pressure steam automatic cleaning device of an air pre-heater.
Background
The air preheater is also called an air preheater for short, is mainly used for a boiler of a thermal power plant, is preheating equipment for improving the heat exchange performance of the boiler and reducing the heat loss, and has the functions of conducting heat carried in flue gas exhausted from a tail flue of the boiler to air before entering the boiler through cooling fins and preheating the air to a certain temperature;
the air preheater can appear blockking up in the use, and the main reason that the air preheater blockked up is that NH4HSO4 that denitration ammonia escaped to cause adheres at air preheater cold junction wall, and the factor that ammonia escaped control is bad mainly has: inaccurate measurement of the flue gas quantity causes inaccurate total amount of NOX in raw flue gas, and the ammonia injection quantity is overlarge; the operation time of the unit is increased, and the activity of the catalyst is reduced; at low load, the temperature of the flue gas at the inlet of the SCR is lower, and the activity of the catalyst is reduced; the factors such as frequent change of unit load, change of coal types, soot blowing of the air preheater and adjustment of operators have certain influence on the blockage of the air preheater;
the corrosion in the air preheater usually occurs in the area with the lowest temperature of a flue gas bin in the low-temperature-level air preheater, the low-temperature corrosion and the accumulated ash are often promoted mutually, the corrosion aggravates the accumulated ash, the blocked ash can increase the flow resistance and weaken the heat transfer of a heating surface, the wall temperature of the heating surface is reduced, the accumulated ash can further attract sulfur oxides to accelerate the corrosion, thereby forming a vicious circle which is promoted mutually in the corrosion and the ash blocking process.
Therefore, the flue gas side of the air preheater needs to be cleaned, at present, the air pipe is adopted for blowing cleaning, but the mode is poor in effect, the hardened accumulated ash in the gaps between the corrugated plates cannot be effectively cleaned, and the cleaning efficiency is low.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above-mentioned problems with the existing online high-pressure steam automatic cleaning device for air pre-heaters.
Therefore, the application aims to provide an on-line high-pressure steam automatic cleaning device for an air preheater.
In order to solve the technical problems, the application provides the following technical scheme: an on-line high-pressure steam automatic cleaning device of an air preheater comprises,
a frame mechanism: the air preheater comprises a fan-shaped outer frame arranged on the flue side of the cold end of the flue side of the three-compartment air preheater, a fixed plate fixed on the inner side of the fan-shaped outer frame, a vapor-liquid mother pipe fixed on the fixed plate, a water pipe connector communicated with the bottom of the vapor-liquid mother pipe and vertically penetrating through the fixed plate, a vapor pipe connector communicated with the bottom of the vapor-liquid mother pipe and vertically penetrating through the fixed plate, and a plurality of nozzle connectors fixed on the upper surface of the vapor-liquid mother pipe at equal intervals;
steam delivery mechanism: one end of the steam pipe connector is communicated with the steam pipe connector and is arranged at the outer side of the fan-shaped outer frame and used for outputting high-temperature steam into the steam-liquid main pipe;
nozzle mechanism: the device comprises a nozzle assembly arranged on a nozzle connecting head and a booster gauge assembly arranged inside the nozzle assembly;
a water filtering mechanism: the water pipe connector is communicated with the bottom of the water pipe connector and used for filtering the introduced water source.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the steam conveying mechanism comprises a high-temperature steam conveying pipe communicated with an external steam generator, a pressure reducing valve arranged in the middle section of the high-temperature steam conveying pipe and used for setting the pressure of the introduced high-temperature steam, a steam conveying pump arranged at the other end, a fixing frame fixedly arranged on the outer side of the fan-shaped outer frame, a steam control valve arranged in the fixing frame and one end of which is connected with the air outlet end of the steam conveying pump, and a steam connecting pipe communicated with the air outlet end of the steam control valve and the air inlet end of which is communicated with a steam pipe connector.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the nozzle assembly comprises a nozzle shell, a threaded pipe, a nozzle plate, a plurality of spray holes and a water collecting cover, wherein the threaded pipe is fixed at one end of the nozzle shell, the other end of the threaded pipe is in threaded connection with the nozzle connector, the nozzle plate is fixed at the other end of the nozzle shell, the spray holes are formed in the axis of the nozzle plate in a dispersed mode, and the water collecting cover is fixed at the inner side of the nozzle plate and covers the outer side of the spray holes.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the booster assembly comprises a reducer pipe, a pipe diameter adjusting piece fixed on the outer side of one end of the reducer pipe, and an adjusting driving piece fixed inside the nozzle shell and used for driving the pipe diameter of the reducer pipe to be adjusted through the pipe diameter adjusting piece.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the reducer comprises a pipe body fixed at one end of the inner side of the nozzle shell, five notches formed in one end of the pipe body at equal intervals, reducing sheets with five arc-shaped sections and formed by dividing one end of the pipe body into five sections through the five notches, folds formed at the outer side of the pipe body and corresponding to the ends of the five reducing sheets, and sealing rubber strips fixed on the two sides of each reducing sheet through bolts.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the gap is isosceles triangle, and two opposite sealing rubber strips are right triangle.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: five groups of pipe diameter adjusting parts are arranged in total and are respectively fixed on the outer sides of one ends of the five reducing sheets;
the pipe diameter adjusting piece comprises a fixing piece fixed on the inner wall of the nozzle shell, an adapter seat fixed on one end of the outer side of the variable-diameter piece, a guide block fixed on the bottom of the fixing piece, a guide groove formed in the surface of the guide block, a linkage rod rotatably mounted on the inner side of the adapter seat, a notch formed in the other end of the linkage rod, and a guide roller fixed on the inner side of the notch and penetrating through the guide groove.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the adjusting driving piece comprises a ring sleeve fixed inside the nozzle shell and attached to the end part of the water collecting cover, a servo motor fixedly mounted on one side of the ring sleeve, a limiting groove equidistantly formed in the other side of the ring sleeve and corresponding to the position of the pipe diameter adjusting piece, a telescopic rod fixed on the outer side of the linkage rod and extending to the inside of the ring sleeve through the limiting groove, helical teeth formed in the other end of the telescopic rod, a rotating ring rotatably arranged inside the ring sleeve, worm-shaped teeth formed on one side of the rotating ring and meshed with the helical teeth, teeth arranged on the outer ring of the rotating ring, and a gear meshed on one side of the teeth and fixedly connected with a driving shaft of the servo motor.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the water filtering mechanism comprises a water pipe fixedly communicated with the water pipe connector, a filter drum fixed at the other end of the water pipe, a hollow pipe fixed inside the water pipe, a filtering cavity formed by a gap between the hollow pipe and the inner wall of the water pipe, through holes equidistantly formed in the surface of the hollow pipe and used for communicating the water pipe and the filtering cavity, a filtering membrane sleeved on the outer side of the hollow pipe, and a water inlet pipe in threaded communication with one end of the filter drum far away from the water pipe.
As a preferable scheme of the online high-pressure steam automatic cleaning device of the air preheater, the application comprises the following steps: the filtering membrane comprises a reverse osmosis membrane sleeved outside the through hole and a vermiculite membrane sleeved outside the reverse osmosis membrane.
The application has the beneficial effects that: the cleaning device provided by the application softens the hardened deposited ash in the gaps between the corrugated plates through high-pressure high-temperature steam, reduces the adhesion of the deposited ash, and simultaneously improves the cleaning force of the air preheater by being matched with clear water flushing;
the nozzle mechanism is provided with a normal pressure mode and a high pressure mode, when the pressure is high, the five reducing sheets are gathered inwards along the crease direction to form a conical structure, the water flow speed is prevented by changing the pipe diameter, so that the water flow is extruded at the position to gradually increase the pressure, the pressure of the water flow is further increased rapidly when the water flow flows through the reducing pipe to form high-pressure water flow, and the flushing efficiency of the air preheater can be improved by utilizing the impact of the high-pressure water flow;
the water filtering mechanism can prevent impurities in water from blocking the nozzle mechanism, so that the smoothness of flushing is improved, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic diagram of the overall structure of the on-line high-pressure steam automatic cleaning device of the air preheater.
Fig. 2 is a schematic structural view of a frame mechanism in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 3 is a schematic structural view of a steam delivery mechanism in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 4 is a schematic structural view of a nozzle mechanism in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 5 is a schematic structural view of a nozzle assembly in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 6 is a schematic structural view of a booster gauge assembly in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 7 is a schematic structural view of a reducer pipe in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 8 is a schematic structural view of a pipe diameter adjusting member in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 9 is a schematic structural view of an adjusting driving member in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Fig. 10 is a schematic view showing an internal structure of an adjusting driving part in the on-line high pressure steam automatic cleaning device of the air preheater of the present application.
FIG. 11 is a schematic structural view of a water filtering mechanism in the on-line high-pressure steam automatic cleaning device of the air preheater of the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present application in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1, there is provided an overall structural schematic diagram of an on-line high pressure steam automatic cleaning device of an air preheater, as shown in fig. 1 to 8, comprising,
frame mechanism 100: the air preheater comprises a fan-shaped outer frame 101 arranged on the flue side of the cold end of the flue side of the three-compartment air preheater, a fixed plate 102 fixed on the inner side of the fan-shaped outer frame 101, a vapor-liquid mother pipe 103 fixed on the fixed plate 102, a water pipe connector 104 communicated with the bottom of the vapor-liquid mother pipe 103 and vertically penetrating through the fixed plate 102, a vapor pipe connector 105 communicated with the bottom of the vapor-liquid mother pipe 103 and vertically penetrating through the fixed plate 102, and a plurality of nozzle connectors 106 equidistantly fixed on the upper surface of the vapor-liquid mother pipe 103;
specifically, one end of the fan-shaped outer frame 101 is provided with a rotating shaft hole, and the rotating shaft hole is rotationally sleeved on the rotating shaft of the three-compartment air preheater, so that the overall stability is improved;
vapor delivery mechanism 200: one end of the steam pipe connector 105 is communicated with the outside of the fan-shaped outer frame 101 and is used for outputting high-temperature steam into the steam-liquid main pipe 103;
nozzle mechanism 300: including a nozzle assembly 301 mounted on the nozzle connection head 106, and a booster gauge assembly 302 mounted inside the nozzle assembly 301;
water filtration mechanism 400: and is communicatively installed at the bottom of the water pipe connector 104, for filtering the introduced water source.
Further, the steam delivery mechanism 200 includes a high temperature steam delivery pipe 201 connected to an external steam generator, a pressure reducing valve 202 installed in the middle section of the high temperature steam delivery pipe 201 for setting the pressure of the high temperature steam, a steam delivery pump 203 installed at the other end, a fixing frame 204 fixedly installed at the outer side of the fan-shaped outer frame 101, a steam control valve 205 installed in the fixing frame 204 and having one end connected to the air outlet end of the steam delivery pump 203, and a steam connecting pipe 206 connected to the air outlet end of the steam control valve 205 and having the air inlet end connected to the steam pipe connector 105.
Specifically, the high-temperature steam delivery pipe 201 is a double-layer vacuum pipe, and the outside is wrapped with a rock wool sleeve, so that the heat preservation effect can be achieved, and the loss during heat transmission is reduced.
Further, the nozzle assembly 301 includes a nozzle housing 301a, a threaded pipe 301b fixed to one end of the nozzle housing 301a and having the other end screwed to the nozzle connector 106, a nozzle plate 301c fixed to the other end of the nozzle housing 301a, a plurality of nozzle holes 301d formed in a dispersed manner at the axial center of the nozzle plate 301c, and a water collecting cover 301e fixed to the inside of the nozzle plate 301c and covering the outside of the nozzle holes 301 d.
Specifically, the water collecting cover 301e is in a horn shape, so that water flow can be collected and guided.
Further, the booster assembly 302 includes a reducer 302a, a pipe diameter adjusting member 302b fixed to the outside of one end of the reducer 302a, and an adjusting driving member 302c fixed to the inside of the nozzle housing 301a for driving the reducer 302a to adjust the pipe diameter size through the pipe diameter adjusting member 302 b.
Further, the reducer 302a includes a tube 302a-1 fixed to one end of the inner side of the nozzle housing 301a, five notches 302a-2 equidistantly formed on one end of the tube 302a-1, five reducing pieces 302a-3 having arc-shaped cross sections and formed by dividing one end of the tube 302a-1 into five sections by the five notches 302a-2, folds 302a-4 formed on the outer side of the tube 302a-1 and corresponding to the ends of the five reducing pieces 302a-3, and sealing strips 302a-5 fixed to two sides of each reducing piece 302a-3 by bolts.
Further, the notch 302a-2 is isosceles triangle, two opposite sealing rubber strips 302a-5 are right triangle, the two right triangle sealing rubber strips 302a-5 can form isosceles triangle after being combined, the five reducing sheets 302a-3 gather inwards along the direction of the crease 302a-4 to form a conical structure, the water flow speed is prevented by changing the pipe diameter, so that the water flow is extruded at the position to increase the water pressure, the pressure of the water flow when flowing through the reducing pipe 302a can be further increased, and the flushing efficiency of the air preheater can be improved by utilizing the impact of high-pressure water flow.
Further, five groups of pipe diameter adjusting members 302b are provided, and the five groups of pipe diameter adjusting members 302b are respectively fixed on the outer sides of one ends of the five reducing plates 302 a-3;
the pipe diameter adjusting member 302b includes a fixing piece 302b-1 fixed to an inner wall of the nozzle housing 301a, a adapter 302b-2 fixed to one end of an outer side of the variable diameter piece 302a-3, a guide block 302b-3 fixed to a bottom of the fixing piece 302b-1, a guide groove 302b-4 opened on a surface of the guide block 302b-3, a link lever 302b-5 rotatably installed inside the adapter 302b-2, a notch 302b-6 opened at the other end of the link lever 302b-5, and a guide roller 302b-7 fixed inside the notch 302b-6 and passing through the guide groove 302 b-4.
The operation process comprises the following steps: the frame mechanism 100 is pre-installed at the cold end flue side of the flue gas side of the three-compartment air preheater, when the air preheater is cleaned, the pressure value is firstly regulated by the pressure reducing valve 202 (the temperature of high-pressure steam is 200-300 ℃ and the pressure is 3-5 MPa), when the pressure reaches the set pressure value, the high-pressure steam is conveyed by the high-temperature steam conveying pipe 201 under the action of the steam conveying pump 203, and is opened by the steam control valve 205, the high-temperature steam enters the steam-liquid main pipe 103 through the steam pipe connector 105 and is sprayed to the cold end flue side of the flue gas side of the air preheater by the plurality of nozzle assemblies 301, the hardened accumulated ash adhered in the gap between the corrugated plates is softened, the adhesiveness of the accumulated ash is reduced, and the three-compartment air preheater can operate and rotate when cleaned, so that the high-pressure steam can completely cover the whole heated surface of the air preheater;
after the accumulated ash is softened, the steam control valve 205 is closed to stop steam delivery, a water source is introduced, the water source enters the steam-liquid main pipe 103 through the water pipe connector 104, and then the water source is sprayed out by the nozzle mechanism 300 for flushing, wherein the flushing has two modes of normal pressure and high pressure;
high pressure regulation: the driving piece 302 is adjusted to drive the five reducing sheets 302a-3 to gather inwards along the direction of the crease 302a-4 to form a conical structure, meanwhile, when the two sides of the five reducing sheets 302a-3 are combined, the sealing rubber strips 302a-5 seal the air preheater, the water flow speed is prevented by changing the pipe diameter, so that the water flow is extruded at the place to increase the water pressure, the pressure of the water flow when flowing through the reducing pipe 302a can be further increased, and the flushing efficiency of the air preheater can be improved by utilizing the impact of high-pressure water flow.
At normal pressure: the five reducing sheets 302a-3 are driven to outwards turn along the direction of the crease 302a-4 by adjusting the driving piece 302, so that the diameters of the two ends of the reducing pipe 302a are consistent, water flow is smooth, normal-pressure flushing is realized, and deposited dust splashed after high-pressure flushing can be flushed, so that the cleaning force is improved.
Example 2
Referring to fig. 9-10, this embodiment differs from the first embodiment in that: the adjusting driving member 302c includes a collar 302c-1 fixed inside the nozzle housing 301a and attached to the end of the water-collecting cap 301e, a servo motor 302c-2 fixedly installed on one side of the collar 302c-1, a limiting groove 302c-3 equidistantly provided on the other side of the collar 302c-1 and corresponding to the position of the pipe diameter adjusting member 302b, a telescopic rod 302c-4 fixed outside the link rod 302b-5 and extending into the collar 302c-1 through the limiting groove 302c-3, a bevel gear 302c-5 provided on the other end of the telescopic rod 302c-4, a rotating ring 302c-6 rotatably provided inside the collar 302c-1, worm teeth 302c-7 provided on one side of the rotating ring 302c-6 and meshed with the bevel gear 302c-5, teeth 302c-8 provided on the outer ring of the rotating ring 302c-6, and a gear 302c-9 meshed on one side of the teeth 302c-8 and having a rotating shaft fixedly connected to the driving shaft of the servo motor 302 c-2.
The rest of the structure is the same as in embodiment 1.
The operation process comprises the following steps: the servo motor 302c-2 is controlled to operate to drive the gear 302c-9 to rotate, the gear 302c-6 is driven to rotate by the teeth 302c-8 in a meshing relationship, meanwhile, the helical teeth 302c-5 at one end of the telescopic rod 302c-4 are meshed with the worm teeth 302c-7 at one side of the rotary ring 302c-6, the helical teeth 302c-5 at one end of the telescopic rod 302c-4 move along the rotating direction of the worm teeth 302c-7 due to the limitation of the limiting groove 302c-3 and can only be forced to move along the limiting groove 302c-3, the linkage rod 302b-5 is driven to move downwards, the linkage rod 302b-5 moves along the direction of the guide groove 302b-4 when moving downwards, the five variable diameter sheets 302a-3 are respectively driven to gather inwards along the direction of the crease 302a-4 to form a conical structure, meanwhile, the water flow speed is prevented by changing the sealing rubber strip 302a-5 when two sides are combined, the water flow is extruded and increased in the water pressure, and the water flow can be further increased by the extrusion pressure at the water flow, and the water flow can be further high in the air flushing efficiency of the pre-pressure impulse device when the variable diameter tube 302a flows through the variable diameter tube.
Example 3
Referring to fig. 11, this embodiment differs from the above embodiment in that: the water filtering mechanism 400 comprises a water pipe 401 fixedly communicated with the water pipe connector 104, a filter cartridge 402 fixed at the other end of the water pipe 401, a hollow pipe 403 fixed inside the water pipe 401, a filtering cavity 404 formed by a gap between the hollow pipe 403 and the inner wall of the water pipe 401, through holes 405 equidistantly formed on the surface of the hollow pipe 403 and used for communicating the water pipe 401 and the filtering cavity 404, a filtering membrane 406 sleeved on the outer side of the hollow pipe 403, and a water inlet pipe 407 screwed on one end, far away from the water pipe 401, of the filter cartridge 402.
Further, the filter membrane 406 includes a reverse osmosis membrane 406a fitted over the through hole 405, and a vermiculite membrane 406b fitted over the reverse osmosis membrane 406 a.
The rest of the structure is the same as in embodiment 2.
The operation process comprises the following steps: the water source enters the filter cartridge 402 through the water inlet pipe 407, and the pressure is increased as the water source in the filter cartridge 402 is increased, so that the water source permeates the vermiculite membrane 406b and the reverse osmosis membrane 406a to enter the water pipe 401 through the through holes 405, and impurities in the water are blocked by the vermiculite membrane 406b and the reverse osmosis membrane 406a and cannot enter the nozzle mechanism 300, so that the blockage of the impurities in the water to the nozzle mechanism 300 can be prevented, the flushing smoothness is improved, and the maintenance cost is reduced;
the water inlet pipe 407 is in threaded connection with the filter cartridge 402, so that the filter cartridge is convenient to detach and replace and clean the filter membrane 406.
It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.

Claims (10)

1. An on-line high-pressure steam automatic cleaning device of an air preheater is characterized in that: comprising the steps of (a) a step of,
frame mechanism (100): the air preheater comprises a fan-shaped outer frame (101) arranged on the flue side of the cold end of the flue gas side of the three-compartment air preheater, a fixed plate (102) fixed on the inner side of the fan-shaped outer frame (101), a vapor-liquid main pipe (103) fixed on the fixed plate (102), a water pipe connector (104) communicated with the bottom of the vapor-liquid main pipe (103) and vertically penetrating through the fixed plate (102), a vapor pipe connector (105) communicated with the bottom of the vapor-liquid main pipe (103) and vertically penetrating through the fixed plate (102), and a plurality of nozzle connectors (106) fixed on the upper surface of the vapor-liquid main pipe (103) at equal intervals;
vapor delivery mechanism (200): one end of the steam pipe connector (105) is communicated with the outer side of the fan-shaped outer frame (101) and is used for outputting high-temperature steam into the steam-liquid main pipe (103);
nozzle mechanism (300): comprises a nozzle assembly (301) arranged on a nozzle connector (106), and a booster gauge assembly (302) arranged inside the nozzle assembly (301);
water filtration mechanism (400): and the filter is communicated with the bottom of the water pipe connector (104) and is used for filtering the introduced water source.
2. The on-line high-pressure steam automatic cleaning device of an air preheater as set forth in claim 1, wherein: the steam conveying mechanism (200) comprises a high-temperature steam conveying pipe (201) communicated with an external steam generator, a pressure reducing valve (202) arranged in the middle section of the high-temperature steam conveying pipe (201) and used for setting the pressure of the introduced high-temperature steam, a steam conveying pump (203) arranged at the other end, a fixing frame (204) fixedly arranged on the outer side of the fan-shaped outer frame (101), a steam control valve (205) arranged in the fixing frame (204) and one end of which is connected with the air outlet end of the steam conveying pump (203), and a steam connecting pipe (206) communicated with the air outlet end of the steam control valve (205) and the air inlet end of which is communicated with the steam pipe connector (105).
3. The on-line high-pressure steam automatic cleaning device of the air preheater as set forth in claim 2, wherein: the nozzle assembly (301) comprises a nozzle shell (301 a), a threaded pipe (301 b) fixed at one end of the nozzle shell (301 a) and the other end of the threaded pipe is in threaded connection with the nozzle connector (106), a nozzle plate (301 c) fixed at the other end of the nozzle shell (301 a), a plurality of spray holes (301 d) formed in the axis of the nozzle plate (301 c) in a dispersed mode, and a water collecting cover (301 e) fixed at the inner side of the nozzle plate (301 c) and covered at the outer side of the spray holes (301 d).
4. An on-line high pressure steam automatic cleaning device for an air preheater as set forth in claim 3, wherein: the booster gauge assembly (302) comprises a reducer pipe (302 a), a pipe diameter adjusting piece (302 b) fixed on the outer side of one end of the reducer pipe (302 a), and an adjusting driving piece (302 c) fixed inside the nozzle shell (301 a) and used for driving the reducer pipe (302 a) to adjust the pipe diameter through the pipe diameter adjusting piece (302 b).
5. The on-line high-pressure steam automatic cleaning device of the air preheater as set forth in claim 4, wherein: the reducer pipe (302 a) comprises a pipe body (302 a-1) fixed at one end of the inner side of a nozzle shell (301 a), five notches (302 a-2) equidistantly arranged at one end of the pipe body (302 a-1), reducing sheets (302 a-3) with five arc-shaped sections and formed by dividing one end of the pipe body (302 a-1) into five sections through the five notches (302 a-2), folds (302 a-4) arranged at the outer side of the pipe body (302 a-1) and corresponding to the ends of the five reducing sheets (302 a-3), and sealing rubber strips (302 a-5) fixed at two sides of each reducing sheet (302 a-3) through bolts.
6. The on-line high-pressure steam automatic cleaning device of the air preheater as set forth in claim 5, wherein: the notch (302 a-2) is isosceles triangle, and two opposite sealing rubber strips (302 a-5) are right triangle.
7. The on-line high-pressure steam automatic cleaning device of the air preheater as set forth in claim 6, wherein: five groups of pipe diameter adjusting pieces (302 b) are arranged in total, and the five groups of pipe diameter adjusting pieces (302 b) are respectively fixed on the outer sides of one ends of the five reducing pieces (302 a-3);
the pipe diameter adjusting piece (302 b) comprises a fixing piece (302 b-1) fixed on the inner wall of the nozzle shell (301 a), a switching seat (302 b-2) fixed on one end of the outer side of the variable-diameter piece (302 a-3), a guide block (302 b-3) fixed on the bottom of the fixing piece (302 b-1), a guide groove (302 b-4) formed in the surface of the guide block (302 b-3), a linkage rod (302 b-5) rotatably mounted on the inner side of the switching seat (302 b-2), a notch groove (302 b-6) formed on the other end of the linkage rod (302 b-5), and a guide roller (302 b-7) fixed on the inner side of the notch groove (302 b-6) and penetrating through the guide groove (302 b-4).
8. An on-line high pressure steam automatic cleaning device for an air preheater as set forth in claim 4 or 7, wherein: the adjusting driving piece (302 c) comprises a ring sleeve (302 c-1) fixed inside a nozzle shell (301 a) and attached to the end part of the water collecting cover (301 e), a servo motor (302 c-2) fixedly installed on one side of the ring sleeve (302 c-1), limit grooves (302 c-3) equidistantly formed in the other side of the ring sleeve (302 c-1) and corresponding to the position of the pipe diameter adjusting piece (302 b), a telescopic rod (302 c-4) fixed on the outer side of the linkage rod (302 b-5) and extending to the inside of the ring sleeve (302 c-1) through the limit grooves (302 c-3), helical teeth (302 c-5) formed on the other end of the telescopic rod (302 c-4), a rotating ring (302 c-6) rotatably arranged inside the ring sleeve (302 c-1), worm teeth (302 c-7) formed on one side of the rotating ring (302 c-6) and meshed with the helical teeth (302 c-5), teeth (302 c-8) arranged on the outer ring of the rotating ring (302 c-6), and a rotating shaft (302 c-2) fixedly connected with the servo motor (302 c-8).
9. The on-line high-pressure steam automatic cleaning device of an air preheater as set forth in claim 8, wherein: the water filtering mechanism (400) comprises a water pipe (401) fixedly communicated with the water pipe connector (104), a filter drum (402) fixed at the other end of the water pipe (401), a hollow pipe (403) fixed inside the water pipe (401), a filter cavity (404) formed by a gap between the hollow pipe (403) and the inner wall of the water pipe (401), through holes (405) formed in the surface of the hollow pipe (403) at equal intervals and used for communicating the water pipe (401) and the filter cavity (404), a filter membrane (406) sleeved on the outer side of the hollow pipe (403) and a water inlet pipe (407) in threaded communication with one end, far away from the water pipe (401), of the filter drum (402).
10. The on-line high-pressure steam automatic cleaning device of an air preheater as set forth in claim 9, wherein: the filtering membrane (406) comprises a reverse osmosis membrane (406 a) sleeved outside the through hole (405), and a vermiculite membrane (406 b) sleeved outside the reverse osmosis membrane (406 a).
CN202311006322.2A 2023-08-10 2023-08-10 Online high-pressure steam automatic cleaning device of air preheater Pending CN117109357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311006322.2A CN117109357A (en) 2023-08-10 2023-08-10 Online high-pressure steam automatic cleaning device of air preheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311006322.2A CN117109357A (en) 2023-08-10 2023-08-10 Online high-pressure steam automatic cleaning device of air preheater

Publications (1)

Publication Number Publication Date
CN117109357A true CN117109357A (en) 2023-11-24

Family

ID=88803155

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311006322.2A Pending CN117109357A (en) 2023-08-10 2023-08-10 Online high-pressure steam automatic cleaning device of air preheater

Country Status (1)

Country Link
CN (1) CN117109357A (en)

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