CN217274215U

CN217274215U - Intelligent soot blowing system of air preheater

Info

Publication number: CN217274215U
Application number: CN202220842090.9U
Authority: CN
Inventors: 奚佳君; 蔡明坤; 薛佳立
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-08-23
Anticipated expiration: 2032-04-08

Abstract

The utility model provides an air preheater intelligence soot blowing system relates to the air preheater field, including heat transfer element jam detection module, soot blowing module and visual monitoring module, heat transfer element jam detection module for detect the specific position that air preheater heat transfer element takes place to block up, soot blowing module for blow the clearance to the jam in the heat transfer element, visual monitoring module for the jam and the loss condition of real-time supervision air preheater heat transfer element and heat transfer element surface temperature; automatic interlocking control is realized through the main control cabinet between the modules, when a heat transfer element blockage detection module detects that a certain region of the air preheater is blocked, the intelligent soot blowing system can timely control the soot blower to directly move to the blocked region and adopt a corresponding blowing mode for processing, compared with the existing manual integral blowing mode, the time effect is faster, the intelligent soot blowing system is more intelligent and more accurate in judgment, the using amount of blowing media is further reduced, and reliable guarantee is provided for the energy conservation and emission reduction green operation of the boiler.

Description

Intelligent soot blowing system of air preheater

Technical Field

The utility model belongs to the air preheater field especially relates to an air preheater intelligence soot blowing system.

Background

At present, the problem of air preheater jam has become the stubborn illness of commonality, the air preheater blocks up the pain point that is the unit operation always, its jam reason also is diversified, along with boiler denitrification facility popularizes in a large number and uses, ammonium bisulfate that residual ammonia and sulfur trioxide reaction produced in the flue gas will produce serious negative effects to rotary preheater, corruption and blocking phenomenon can appear in the preheater heat transfer element, finally lead to heat transfer element to take place the damage of different degree, produce important influence to the normal operating of preheater and boiler.

At present, the treatment scheme to air preheater heat transfer element jam mainly adopts and improves cold junction component height, and means such as high pressure water washing, and along with the decline of boiler coal quality and the unstability of spouting ammonia equipment operation, can cause ammonium bisulfate to take place the deposit in certain region of air preheater cold junction component, along with the continuous absorption of deposition, whole component can take place to block up for air preheater operating resistance constantly risees, and heat exchange efficiency progressively descends. Once the blockage is realized seriously, the measures such as integral high-pressure soot blowing and the like are not effective, and the elements can be damaged and have irreversible effect by adopting an online flushing mode and blindly increasing the flushing pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the concrete position that blocks up takes place for accurate location, detection air preheater heat transfer element, in time control soot blower removes to blockking up the region to take corresponding mode of sweeping to clear up.

In order to solve the technical problem, the utility model provides an air preheater intelligence soot blowing system, including heat transfer element jam detection module and soot blowing module, heat transfer element jam detection module for detect the specific position that air preheater heat transfer element takes place to block up, soot blowing module is used for sweeping the jam in the heat transfer element;

the soot blowing module comprises a soot blower, a blowing medium supply device and a main control cabinet, wherein the soot blower comprises a soot blowing gun barrel, an external telescopic pipe, an external roadster and a wall box, the wall box and the external roadster are positioned outside an air preheater shell, the external roadster is fixed on the external telescopic pipe, a first through hole is formed in the air preheater shell, one end of the external telescopic pipe is connected with the wall box, the other end of the external telescopic pipe is inserted into the first through hole to enter the interior of the air preheater shell, and the soot blowing gun barrel sequentially penetrates through the first through hole in the air preheater shell, and the external telescopic pipe is connected and fixed with an interface in the wall box; and the purging medium interface on the outer side of the wall box is connected with the purging medium supply equipment, a valve is arranged on the soot blowing gun barrel, and the main control cabinet controls the movement of an external roadster and the opening and closing of the valve.

The outer telescopic pipe is movable, the outer sports car is fixedly installed on the outer telescopic pipe and drives the outer telescopic pipe and the wall box to move back and forth, and the position of the outer telescopic pipe relative to the air preheater shell is changed, so that the wall box and the soot blowing gun barrel are driven to move to a blocking position along the moving direction of the outer telescopic pipe.

Further, when the purging medium provided by the purging medium supply device is steam, the steam is defined as a steam soot blowing module, and the purging medium supply device is specifically a steam source supply device; when the sweeping medium supplied by the sweeping medium supply device is high-pressure water, the blowing module is defined as a high-pressure water soot blowing module, and the high-pressure water is supplied by a high-pressure water pump.

Further, in the high-pressure water soot blowing module, the soot blower is arranged at the cold end of the air preheater, and the high-pressure water pump is connected with a power supply device, a water supply device and a main control cabinet; the number of the steam soot blowing modules is two, and the two soot blowers are respectively arranged at the cold end and the hot end of the air preheater.

Because the cold end of the air preheater is blocked and is difficult to clean than the hot end, a high-pressure water soot blowing module and a steam soot blowing module are preferably arranged at the cold end of the air preheater, so that the cleaning efficiency is improved.

Further, the heat transfer element blockage detection module comprises an air preheater heat transfer element blockage detection device, a proximity switch and a control module;

the blockage detection device for the heat transfer element of the air preheater comprises a full-pressure detection pipe, a static-pressure detection pipe, an external furnace telescopic pipe, an external furnace roadster and an electromagnetic valve box, wherein the electromagnetic valve box and the external furnace roadster are positioned outside an air preheater shell, the external furnace roadster is fixed on the external furnace telescopic pipe, a second through hole is formed in the air preheater shell, one end of the external furnace telescopic pipe is connected with the electromagnetic valve box, and the other end of the external furnace telescopic pipe is inserted into the second through hole to enter the air preheater shell. The full-pressure detection pipe and the static pressure detection pipe sequentially penetrate through a second through hole in the air preheater shell and an external telescopic pipe to be connected with the electromagnetic valve box, electromagnetic valves are arranged on the full-pressure detection pipe and the static pressure detection pipe, the electromagnetic valve box controls the opening and closing of the electromagnetic valves, and a pressure transmitter is arranged in the electromagnetic valve box;

the external extension tube of the furnace is movable, the external roadster is fixedly arranged on the external extension tube of the furnace and drives the external extension tube of the furnace and the electromagnetic valve box to move back and forth, and the position of the external extension tube of the furnace relative to the air preheater shell is changed, so that the full-pressure detection tube and the static-pressure detection tube are driven to move along the moving direction of the external extension tube of the furnace.

The full-pressure detection pipe and the static-pressure detection pipe are connected with the pressure transmitter, and the difference value between the full pressure and the static pressure is obtained through the pressure transmitter, so that the dynamic pressure value of the detection position is obtained;

the proximity switch is located the pivot side of air preheater rotor, the outside of pivot sets up the sheetmetal that corresponds with the storehouse check position of every rotor in the air preheater, the quantity of storehouse check with the quantity of sheetmetal is the same control module with air preheater heat transfer element blocks up detection device and proximity switch and is connected.

Proximity switch is fixed motionless, and air preheater rotor and pivot synchronous rotation set up a plurality ofly and the interior storehouse check position of every rotor of air preheater sheetmetal that corresponds through in the air preheater pivot outside, and at the rotatory in-process of rotor and pivot, when each sheetmetal in the pivot outside when proximity switch, proximity switch can be respectively proximity switch and take notes a numerical value, for the storehouse check number that corresponds.

Furthermore, one end of the full-pressure detection pipe is a 90-degree bent pipe and faces the direction of the airflow, so that the detection sensitivity is improved, and the influence of disturbance is small.

Furthermore, the air preheater heat transfer element blockage detection device also comprises a back-blowing pipe, and the back-blowing pipe is communicated with the full-pressure detection pipe and the static-pressure detection pipe.

Further, the running car outside the furnace moves on the carriage outside the furnace.

The running vehicle outside the furnace drives the telescopic pipe outside the furnace and the electromagnetic valve box to move back and forth together, so that the full-pressure detection pipe and the static-pressure detection pipe are driven to move, the full pressure and the static pressure at corresponding positions are detected, and the blockage condition of the air preheater is detected.

The system comprises a hot end camera device, a cold end camera and thermal imaging device and a monitoring screen control box, wherein the monitoring screen control box is connected with the hot end camera device and the cold end camera and thermal imaging device;

the hot end camera device is used for monitoring the operation conditions of the heat transfer element and the sealing sheet inside the hot end of the air preheater in real time on line, and the cold end camera and thermal imaging device is used for monitoring the operation conditions of the heat transfer element and the sealing sheet inside the cold end of the air preheater in real time and measuring the surface temperature of the heat transfer element inside the cold end.

Further, the control module is connected with the main control cabinet.

Furthermore, the hot-end camera device is a video camera, and the cold-end camera and thermal imaging device comprises a video camera and an infrared thermal imager.

Has the advantages that:

(1) the utility model provides an air preheater intelligence soot blowing system, block up detection module including heat transfer element, steam blows the soot module, high pressure water blows soot module and visual monitoring module, four operation modules realize automatic interlocking control through main control cabinet, when heat transfer element blocks up detection module and detects out that certain region of air preheater takes place to block up, intelligence blows soot system and can reach time control soot blower direct movement to blocking up the region, and take corresponding mode of sweeping to handle, it is faster to take artifical whole mode of sweeping its time effect at present, it is more intelligent, judge more accurately, the quantity that the medium was swept has also further been reduced, provide reliable guarantee for boiler energy saving and emission reduction green operation.

In the operation process, the situation that air preheater heat transfer element blockked up can progressively enlarge along with the operating duration increases, when taking place slight jam, the treatment effect is better, and this intelligence soot blower system just can in time judge the processing at the initial stage that air preheater took place to block up, and sensitivity is high, avoids the aggravation of follow-up jam condition to better preventing that air preheater from taking place to block up.

(2) The utility model provides a heat transfer element blocks up detection module adopts portable dynamic pressure to detect the principle, can carry out online removal and detect, detects the dynamic pressure numerical value in every heat transfer element package region, arranges in air preheater exhanst gas outlet position, sets for the dynamic pressure data and the original data contrast of position through detecting every heat transfer element and comes accurate positioning to block up the position, provides the judgement and sweeps the foundation for blowing of soot module. Compared with a fixed structure, the movable heat transfer element blockage detection module has the advantages that the detection area is larger, the number of detection pipelines is greatly reduced, equipment is more integrated, the operation is simple and flexible, the field installation workload is smaller, the detection of a certain specific area is more accurate, the detection data is more stable, the detection efficiency is higher, the detection can be rapidly repeated, and the occupied installation space is smaller and lighter.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic structural diagram of a blockage detection device for a heat transfer element of an air preheater;

FIG. 2 is a schematic diagram of the placement of the blockage detection device of the heat transfer element of the air preheater relative to the air preheater;

FIG. 3 is a schematic view of the placement of the proximity switch relative to the air preheater rotor;

FIG. 4 is a schematic view of FIG. 3 taken along line E;

FIG. 5 is a schematic view of a rotor compartment of the air preheater;

FIG. 6 is a schematic diagram of a sootblower configuration;

FIG. 7 is a schematic control diagram of a steam soot blowing module;

FIG. 8 is a schematic control diagram of a high pressure water soot blowing module;

FIG. 9 is a control schematic diagram of an intelligent soot blowing system of an air preheater;

reference numerals:

1. a full pressure detection tube; 2. a static pressure detection tube; 3. a blowback pipe; 4. a solenoid valve housing; 5. running outside the furnace; 6. a furnace outer bracket; 7. sealing a sleeve outside the furnace; 8. supporting a pipe in the furnace; 9. a proximity switch; 10. an extension tube outside the furnace; 11. an air preheater housing; 12. A bin is checked; 13. a first gun barrel; 14. a second gun barrel; 15. an inner barrel support; 16. an outer sealing sleeve; 17. an outer bracket; 18. an external sports car; 19. a wall box; 20. an external extension tube; 21. a soot blower; 22. a steam source supply device; 23. a main control cabinet; 24. a thermometer; 25. a pressure gauge; 26. a high pressure water pump; 27. a water supply device; 28. a power supply device; 29. the air preheater heat transfer element blockage detection device; 30. a control module; 31. a hot end camera device; 32. a cold-end camera and thermal imaging device; 33. a monitor screen control box; 34. a rotating shaft; 35. a rotor; 36. a metal sheet.

Detailed Description

The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

Example (b):

as shown in fig. 1 to 9, in a preferred embodiment, the utility model provides an air preheater intelligent soot blowing system, which comprises a heat transfer element blockage detection module, a soot blowing module and a visual monitoring module, wherein the heat transfer element blockage detection module is used for detecting the specific position of the air preheater heat transfer element where blockage occurs, the soot blowing module is used for cleaning the blockage in the heat transfer element, and the visual monitoring module is used for monitoring the blockage and loss conditions of the air preheater heat transfer element and the surface temperature of the heat transfer element in real time;

the soot blowing module comprises a soot blower 21, a blowing medium supply device and a main control cabinet 23, wherein the soot blower 21 comprises a soot blowing gun barrel, an external telescopic pipe 20, an external roadster 18, a wall box 19, an external sealing sleeve 16 and an internal gun barrel support 15, the wall box 19 and the external roadster 18 are positioned outside the air preheater shell 11, the external telescopic pipe 20 can move relative to the air preheater shell, and the external roadster 18 is fixed on the external telescopic pipe 20 and drives the external telescopic pipe 20 and the wall box 19 to move back and forth; a first through hole is formed in the shell of the air preheater, an external sealing sleeve 16 is welded at the first through hole, an internal gun barrel support 15 is located in the shell 11 of the air preheater and fixed on the shell 11 of the air preheater, one end of an external telescopic pipe 20 is connected with a wall box 19, the other end of the external telescopic pipe penetrates through the external sealing sleeve 16 to enter the internal gun barrel support 15, the external telescopic pipe 20 can move in the external sealing sleeve 16 and the internal gun barrel support 15, a gun barrel soot blower sequentially penetrates through the first through hole in the shell 11 of the air preheater, the external telescopic pipe 20 is fixedly connected with an internal interface of the wall box 19, an external purging medium interface on the wall box 19 is connected with a purging medium supply device, a valve is arranged on a soot blowing gun barrel, and a main control cabinet 23 controls the movement of an external roadster 18 and the opening and closing of the valve.

The outer telescopic pipe 20 is a hollow tubular structure, the outer roadster 18 is fixedly arranged on the outer telescopic pipe 20, and the outer telescopic pipe 20 and the wall box 19 are driven to move back and forth on the outer bracket 17 together, so that the soot blowing gun barrel is driven to move to a blocking position along the moving direction of the outer telescopic pipe 20, and the blocking position is blown and cleaned.

The soot blowing gun barrel comprises two gun barrels, namely a gun barrel I13 and a gun barrel II 14, nozzles are arranged on the gun barrel I13 and the gun barrel II 14 and can move, the nozzles are installed in an inner gun barrel support 15 and penetrate through an outer telescopic pipe 20 to be fixedly connected with an inner interface on a wall box 19, an outer purging medium interface of the wall box 19 is connected with a purging medium supply device without leakage, and the inner gun barrel support 15 is located inside the air preheater shell 11.

The inner barrel support 15 consists of channel steel and pipe clamps, the pipe clamps are arranged on the channel steel, the soot blowing barrel can slide in the inner barrel support 15 to prevent the soot blowing barrel from vibrating greatly during blowing,

when the gun barrel type air preheater is installed on site, the outer bracket 17 is firstly positioned and fixed on a corresponding position, a first through hole is formed in a corresponding position of the air preheater shell 11, the outer sealing sleeve 16 is welded in a sealing mode, the first gun barrel 13 and the second gun barrel 14 are inserted into the hole of the outer sealing sleeve 16 together, the inner gun barrel support 15 is installed, the first gun barrel 13 and the second gun barrel 14 are positioned and can move back and forth, the outer sealing sleeve 16 is welded with the air preheater shell 11 in a sealing mode, the first gun barrel 13 and the second gun barrel 14 penetrate through the outer telescopic pipe 20 and are fixedly connected with an inner purging medium interface on the wall box 19, the outer roadster 18, the outer telescopic pipe 20 and the wall box 19 are integrally assembled and then installed and positioned with the outer bracket 17, and the outer telescopic pipe 20 can move back and forth under the driving of the outer roadster 18.

When the purging medium supplied by the purging medium supply device is steam, the steam source supply device 22 is defined as a steam soot blowing module; the high pressure water sootblowing module is defined when the purging medium supplied from the purging medium supply device is high pressure water supplied by the high pressure water pump 26.

In the high-pressure water soot blowing module, a soot blower 21 is arranged at the cold end of an air preheater, and a high-pressure water pump 26 is connected with a power supply device 28, a water supply device 27 and a main control cabinet 23; the number of the steam soot blowing modules is two, and the two soot blowers 21 are respectively arranged at the cold end and the hot end of the air preheater.

As shown in fig. 7, a control schematic diagram of a steam soot blowing module is shown, a soot blower 21 is respectively installed at the cold end and the hot end of an air preheater, a soot blowing gun tube is connected with a steam source supply device 22, a thermometer 24, a pressure gauge 25 and valves are installed on a first gun tube 13 and a second gun tube 14 in the soot blower 21, and all the thermometers 24, the pressure gauge 25 and the valves are connected with a main control cabinet 23. When the heat transfer element blockage detection module detects that the inner side area of the air preheater is blocked, according to a set initial position, the main control cabinet 23 calculates a radial distance to a blockage position coordinate, the external roadster 18 drives the gun tube I13 and the gun tube II 14 to move together to reach the blocked area on the inner side of the heat transfer element, and only a valve on the gun tube I13 is opened for purging; when the area outside the air preheater is detected to be blocked, the external roadster 18 drives the first gun tube 13 and the second gun tube 14 to reach the blocked area, and only the valve on the second gun tube 14 is opened for corresponding purging, so that independent control of purging inside and outside the air preheater is realized.

The soot blowing gun barrel is provided with steam temperature and pressure detection, the steam temperature and pressure detection is judged through parameters of a thermometer 24 and a pressure gauge 25, if the steam parameters do not meet the blowing design requirements, the valve is closed to not blow soot, and the blowing damage of the heat transfer element is prevented.

As shown in fig. 8, which is a control schematic diagram of a high-pressure water soot blowing module, a soot blower 21 is installed at the cold end of an air preheater, the lance tube of the soot blower is connected with a high-pressure water pump 26, valves on the first lance tube 13 and the second lance tube 14 and the high-pressure water pump 26 are connected with a main control cabinet 23, and the high-pressure water pump 26 is connected with a water supply device 27 and a power supply device 28. When the heat transfer element blockage detection module detects that the area inside the air preheater is blocked, the first gun tube 13 and the second gun tube 14 move to corresponding positions to only open the valve on the first gun tube 13 for flushing, and if the blocked area is detected to exist outside the heat transfer element, the first gun tube 13 and the second gun tube 14 move to the blocked area to only open the valve on the second gun tube 14 for corresponding flushing operation. If a full overall purge is required, the valves on barrel one 13 are opened first, and then the valves on barrel two 14 are opened to gradually complete the full purge in an alternating purge manner.

The heat transfer element blockage detection module comprises an air preheater heat transfer element blockage detection device 29, a proximity switch 9 and a control module 30:

the blockage detection device 29 for the heat transfer element of the air preheater comprises three full-pressure detection tubes 1, a static pressure detection tube 2, an external expansion tube 10, an external roadster 5, an electromagnetic valve box 4, an external sealing sleeve 7, an internal supporting tube 8 and a back flushing tube 3, wherein the electromagnetic valve box 4 and the external roadster 5 are positioned outside an air preheater shell 11, the external expansion tube 10 can move relative to the position of the air preheater shell, and the external roadster 5 is fixedly arranged on the external expansion tube 10 and drives the external expansion tube 10 and the electromagnetic valve box 4 to move back and forth; a second through hole is formed in the air preheater shell, the second through hole is welded with an outer furnace sealing sleeve 7 in a sealing mode, an inner furnace supporting tube 8 is located in the air preheater shell 11 and sleeved on the outer side of an outer furnace telescopic tube and fixed on the air preheater shell 11, one end of the outer furnace telescopic tube 10 is connected with the electromagnetic valve box 4, the other end of the outer furnace telescopic tube penetrates through the outer furnace supporting tube 7 and the inner furnace supporting tube 8, the full-pressure detection tube 1 and the static pressure detection tube 2 sequentially penetrate through the inner furnace supporting tube 8, the through hole in the air preheater shell 11 and the outer furnace telescopic tube 10 and are connected with the electromagnetic valve box 4, electromagnetic valves are arranged on the full-pressure detection tube 1 and the static pressure detection tube 2, the electromagnetic valve box 4 controls the opening and closing of the electromagnetic valves, and a pressure transmitter is arranged in the electromagnetic valve box 4.

And the full-pressure detection pipe 1 and the static-pressure detection pipe 2 are connected with a pressure transmitter to obtain a dynamic pressure value of a detection position.

One end of the full-pressure detection tube 1 is a 90-degree bent tube and faces to the direction of the airflow, so that the detection sensitivity is improved.

The static pressure detection tube 2 is a straight tube and is used for measuring the air pressure in the whole space.

The blowback pipe 3 is communicated with the full-pressure detection pipe 1 and the static pressure detection pipe 2, and when the detection is not carried out, the electromagnetic valve of the blowback pipe 3 is opened, and compressed air is introduced for blowback to prevent the pipeline from being blocked.

The external furnace carriage 5 drives the external furnace extension pipe and the electromagnetic valve box 4 to move back and forth on the external furnace bracket 6, so as to drive the full-pressure detection pipe 1 and the static-pressure detection pipe 2 to move, detect the full pressure and the static pressure at corresponding positions and realize the detection of the blockage condition of the air preheater.

The external extension tube 10 of the furnace is of a hollow tubular structure, the full-pressure detection tube 1 and the static-pressure detection tube 2 are movably arranged in the internal support tube 8 of the furnace and penetrate through the external extension tube 10 of the furnace to be fixedly butted with a corresponding interface on the electromagnetic valve box 4 without leakage, the internal support tube 8 of the furnace is positioned in the air preheater shell 11, a strip-shaped groove is formed in the internal support tube 8 of the furnace, the length of the strip-shaped groove is consistent with the displacement of the moving end of a bent tube of the full-pressure detection tube, a certain allowance is reserved, and the bent tube end extends out of the strip-shaped groove, so that the full pressure at the corresponding position is detected.

When in field installation, firstly, the external bracket 6 of the furnace is positioned and fixed, a second through hole is arranged at the corresponding position of the shell 11 of the air preheater and is welded with the external sealing sleeve 7 of the furnace in a sealing way, the full pressure detection tube 1 and the static pressure detection tube 2 penetrate into the external extension tube 10 of the furnace and are fixedly connected with a detection interface reserved on the electromagnetic valve box 4, the external extension tube 10 of the furnace is sealed by the external sealing sleeve 7 of the furnace, then, the full pressure detection tube 1, the static pressure detection tube 2 and one end of the external extension tube 10 of the furnace, which is far away from the electromagnetic valve box 4, penetrate through the external sealing sleeve 7 of the furnace and are inserted into the air preheater, the internal support tube 8 of the furnace is arranged, the internal support tube 8 of the furnace is sleeved outside the external extension tube 10 of the furnace and is fixed on the shell 11 of the air preheater, the diameter of the internal support tube 8 of the furnace is slightly larger than that of the external extension tube 10 of the furnace, and is fixed by the external sealing way of the external sealing sleeve 7 of the furnace, so as to play the roles of limiting and supporting the full pressure detection tube 1, the static pressure detection tube 2 and the external extension tube 10 of the furnace, so that the utility model can only move back and forth and can not swing left and right. The external extension tube 10, the external roadster 5 and the electromagnetic valve box 4 are welded and fixed to form an integral structure and are installed on the external bracket 6 so that the external extension tube can move back and forth and cannot swing left and right, the external roadster 5 drives the external extension tube and the electromagnetic valve box 4 to move back and forth together so as to drive the full-pressure detection tube 1 and the static pressure detection tube 2 to move, the electromagnetic valve box 4 controls the opening and closing of the electromagnetic valve on the detection tube, the electromagnetic valve on the corresponding pipeline is opened during detection, the back-flushing tube 3 is communicated with the full-pressure detection tube 1 and the static pressure detection tube 2, and the electromagnetic valve of the back-flushing tube 3 is opened during non-detection, compressed air is introduced for back flushing, and pipeline blockage is prevented.

The proximity switch 9 is located at the side of a rotating shaft 34 of a rotor 35 of the air preheater, a plurality of metal sheets 36 corresponding to the positions of bin grids 12 of each rotor 35 in the air preheater are arranged at the outer side of the rotating shaft 34, the number of the bin grids is the same as that of the metal sheets, a control module 30 is connected with the blockage detection device 29 of the heat transfer element of the air preheater and the proximity switch 9, and the control module 30 controls the movement and starting and stopping of the running car 5 outside the furnace. The direction and displacement of the movement are controlled.

Proximity switch 9 is the fixed transfixion, and air preheater rotor 35 and pivot synchronous rotation, through set up a plurality of sheetmetals 36 that correspond with the storehouse check 12 position of every rotor 35 in the air preheater pivot 34 outside, at rotor 35 and the rotatory in-process of pivot 34, when each sheetmetal 36 in the pivot 34 outside passes through proximity switch 9, proximity switch 9 can be respectively proximity switch and record a numerical value, for the storehouse check number that corresponds. The coordinates and distribution positions of the clogged area are collected in synchronization with the dynamic pressure data detected by the air preheater heat transfer element clogging detecting device 29.

In this embodiment, the air preheater heat transfer element blockage detection device 29 is arranged at the flue position of the air outlet at the hot end of the air preheater, the movable range of one full-pressure detection tube 1 is the distance between two or more element packages, and two points can be detected in one element package region. The element bag is placed in the bin 12; the proximity switch 9 is fixed, the metal sheet 36 is fixed with the rotating shaft 34, the air preheater rotor 35 and the rotating shaft rotate synchronously, one metal sheet 36 corresponding to the position of the bin 12 of each rotor 35 in the air preheater is arranged, when the rotor 35 rotates, one metal sheet 36 on the outer side of the rotating shaft passes through the proximity switch 9, the proximity switch 9 records one numerical value, and the corresponding bin number of the rotor 35 is recorded through the proximity switch 9. As shown in fig. 3 to 5, one air preheater rotor compartment 12 is divided into 48 sector areas, the number of the compartment 12 is 48 as the same as the number of the metal sheets 36, each sector area is also divided into small compartments 12 from a to F, A, B, C is defined as the inner area, D, E, F is the outer area, when the air preheater operates, the rotor 35 rotates endlessly, when the component blockage detection device starts to operate, the proximity switches 9 start to count endlessly at the same time, at a certain moment, when the air preheater heat transfer component blockage detection device detects that the B area of the compartment 12 is blocked, the proximity switches send the recorded compartment number to the control module together, and finally the blocked area coordinate information, such as (B, 10), is formed in the control module, and after all the compartment 12 detection processes are finished, the blockage detection device can converge the dynamic pressure values and the corresponding coordinate values of all the compartments 12 of the air preheater heat transfer component into the whole rotor compartment 12 12, provide coordinates for subsequent sootblowers 21 to perform purging.

During detection, the running car 5 outside the furnace drives the telescopic pipe 10 outside the furnace, the electromagnetic valve box 4, the full-pressure detection pipe 1 and the static pressure detection pipe 2 to move together in the axial direction and detect the full pressure and the static pressure of the corresponding positions, the innermost detection pipe of the full-pressure detection pipe 1 detects A, B bins, the middle detection pipe detects C, D area, the outermost detection pipe detects E, F area, the electromagnetic valve box 4 controls the opening and closing of the electromagnetic valve on the corresponding detection pipe, the pressure transmitter in the electromagnetic valve box 4 obtains the dynamic pressure value of the detection position, when the detection is not performed, the electromagnetic valve of the back-flushing pipe 3 is opened, compressed air is introduced for back flushing, and pipeline blockage is prevented.

The visual monitoring module comprises a hot end camera device 31, a cold end camera and thermal imaging device 32 and a monitoring screen control box 33, wherein the monitoring screen control box 33 is connected with the hot end camera device 31 and the cold end camera and thermal imaging device 32;

the hot end camera device 31 is a camera and is used for monitoring the operation conditions of a heat transfer element and a sealing sheet in the hot end of the air preheater in real time on line and has the function of measuring the gap by pixels to detect the radial sealing gap; the cold-end camera and thermal imaging device 32 comprises a camera and an infrared thermal imager, and is used for monitoring the running conditions of the internal cold-end heat transfer element and the sealing sheet of the air preheater in real time and measuring the surface temperature of the internal cold-end heat transfer element, and has a fire overtemperature alarm function.

The monitoring screen control box 33 can conveniently realize local and remote video monitoring, and transmits temperature data to the monitoring screen control box 33 to judge whether the temperature is ultrahigh, and the DCS judges whether to perform fire alarm.

And the heat transfer element blockage detection module comprises an air preheater heat transfer element blockage detection device 29, a proximity switch 9 and a control module 30. The air preheater heat transfer element blockage detection device 29 detects the dynamic pressure value of each heat transfer element, the proximity switch 9 synchronously records the current rotor bin number, finally, all test data are collected through the control module 30, the blockage situation distribution schematic diagram of the whole rotor 35 can be obtained, the control module 30 is connected with the main control cabinet 23, and the coordinates of the area needing to be processed are transmitted to the main control cabinet 23.

The steam soot blowing module mainly comprises two soot blowers 21 at a cold end and a hot end, a steam source supply device 22 and a main control cabinet 23. When the main control cabinet 23 receives the coordinate signal of the heat transfer element blockage detection module, the soot blower 21 at the corresponding position is started to directly reach the blockage area for steam purging.

The high-pressure water soot blowing module mainly comprises a soot blower 21, a high-pressure water pump 26, a power supply device 28, a water supply device 27 and a main control cabinet 23. High-pressure water is generated by the high-pressure water pump 26, the highest washing pressure can reach 35MPa, and when the main control cabinet 23 receives a coordinate signal of the heat transfer element blockage detection module, the soot blower 21 is controlled to directly reach the blockage area and is blown by corresponding media.

This air preheater intelligence soot blowing system need not artifical judgement and location, judges by system automated inspection completely, and precision and sensitivity are high, utilizes heat transfer element to block up the signal of detection module output, and the regional distribution map of jam is gathered automatically to the scope coordinate that will sweep passes through control module 30 and transmits for main control cabinet 23, and then control soot blower 21, according to the data that the comparison system is predetermine, the mode of sweeping that the intelligent judgement needs to adopt is handled.

This air preheater intelligence soot blowing system sweeps comprehensively regularly on a large scale than traditional and possesses full intelligent judgement and processing, adapts to the soot blowing of various operating condition, and the treatment effeciency is high, and the ageing is fast, just can in time handle when detecting out certain position and take place local jam, has avoided the accumulation and the aggravation of the jam condition, owing to adopt inside and outside subregion to sweep, has also reduced the medium quantity of sweeping simultaneously, has reduced the energy consumption of whole soot blowing system.

Finally, it should be noted that: the present invention is not limited to the above embodiments, and all the equivalent structures or equivalent processes that are used in the specification and the attached drawings are transformed or directly or indirectly used in other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The intelligent soot blowing system of the air preheater is characterized by comprising a heat transfer element blockage detection module and a soot blowing module, wherein the heat transfer element blockage detection module is used for detecting the specific position of the heat transfer element of the air preheater, and the soot blowing module is used for blowing and cleaning the blockage in the heat transfer element;

the soot blowing module comprises a soot blower (21), a blowing medium supply device and a main control cabinet (23), the soot blower (21) comprises a soot blowing gun barrel, an external telescopic pipe (20), an external roadster (18) and a wall box (19), the wall box (19) and the external roadster (18) are positioned outside an air preheater shell (11), the external roadster (18) is fixed on the external telescopic pipe (20), a first through hole is formed in the air preheater shell (11), one end of the external telescopic pipe (20) is connected with the wall box (19), the other end of the external telescopic pipe is inserted into the first through hole to enter the air preheater shell (11), the soot blowing gun barrel sequentially penetrates through the first through hole in the air preheater shell (11), the blowing medium interface on the external telescopic pipe (20) and the wall box (19) to be connected with the blowing medium supply device, and a valve is arranged on the soot blowing gun barrel, the main control cabinet (23) controls the movement of the external sports car (18) and the opening and closing of the valve.

2. The air preheater intelligent soot blowing system as set forth in claim 1, wherein a steam soot blowing module is defined when the purge medium supplied by the purge medium supply device is steam, the purge medium supply device being specifically a steam source supply device (22); when the purging medium supplied by the purging medium supply device is high-pressure water, the high-pressure water is defined as a high-pressure water soot blowing module, and the high-pressure water is supplied by a high-pressure water pump (26).

3. The intelligent soot blowing system of the air preheater as recited in claim 2, wherein in the high-pressure water soot blowing module, the soot blower (21) is arranged at a cold end of the air preheater, and the high-pressure water pump (26) is connected with a power supply device (28), a water supply device (27) and a main control cabinet (23); the number of the steam soot blowing modules is two, and the two soot blowers (21) are respectively arranged at the cold end and the hot end of the air preheater.

4. The air preheater intelligent soot blowing system of claim 1, wherein the heat transfer element blockage detection module comprises an air preheater heat transfer element blockage detection device (29), a proximity switch (9) and a control module (30);

the blockage detection device (29) for the heat transfer element of the air preheater comprises a full-pressure detection pipe (1), a static-pressure detection pipe (2), an external telescopic pipe (10), an external roadster (5) and an electromagnetic valve box (4), wherein the electromagnetic valve box (4) and the external roadster (5) are positioned outside an air preheater shell (11), the external roadster (5) is fixed on the external telescopic pipe (10), a second through hole is formed in the air preheater shell (11), one end of the external telescopic pipe (10) is connected with the electromagnetic valve box (4), the other end of the external telescopic pipe is inserted into the second through hole to enter the air preheater shell (11), the full-pressure detection pipe (1) and the static-pressure detection pipe (2) sequentially penetrate through the second through hole in the air preheater shell (11), the external telescopic pipe (10) is connected with the electromagnetic valve box (4), and electromagnetic valves are arranged on the full-pressure detection pipe (1) and the static-pressure detection pipe (2), a pressure transmitter is arranged in the electromagnetic valve box (4);

the full-pressure detection pipe (1) and the static-pressure detection pipe (2) are connected with the pressure transmitter to obtain a dynamic pressure value of a detection position;

the air preheater heat transfer element blocking detection device is characterized in that the proximity switch (9) is located on the side edge of a rotating shaft (34) of a rotor (35) of the air preheater, metal sheets (36) corresponding to positions of bin grids (12) of each rotor (35) in the air preheater are arranged on the outer side of the rotating shaft (34), the number of the bin grids (12) is the same as that of the metal sheets (36), and the control module (30) is connected with the air preheater heat transfer element blocking detection device (29) and the proximity switch (9).

5. The intelligent soot blowing system of an air preheater as claimed in claim 4, wherein one end of the full pressure detection tube (1) is a 90 ° bent tube.

6. The intelligent soot blowing system of an air preheater as claimed in claim 5, wherein the air preheater heat transfer element blockage detection device (29) further comprises a blowback pipe (3), and the blowback pipe (3) is communicated with the full pressure detection pipe (1) and the static pressure detection pipe (2).

7. The intelligent soot blowing system of the air preheater as claimed in claim 1, further comprising a visual monitoring module, wherein the visual monitoring module comprises a hot-end camera device (31), a cold-end camera and thermal imaging device (32) and a monitoring screen control box (33), and the monitoring screen control box (33) is connected with the hot-end camera device (31) and the cold-end camera and thermal imaging device (32);

the hot end camera device (31) is used for monitoring the operation conditions of the heat transfer element and the sealing sheet inside the hot end of the air preheater in real time on line, and the cold end camera and thermal imaging device (32) is used for monitoring the operation conditions of the heat transfer element and the sealing sheet inside the cold end of the air preheater in real time and measuring the surface temperature of the heat transfer element inside the cold end.

8. The intelligent soot blowing system of an air preheater as claimed in claim 7, wherein a control module (30) is connected with the main control cabinet (23).

9. The intelligent soot blowing system of the air preheater as recited in claim 8, wherein the hot-end camera (31) is a camera, and the cold-end camera and thermal imaging device (32) comprises a camera and an infrared thermal imager.