CN217132546U - Air preheater heat transfer element blocks up detection device and detecting system - Google Patents

Abstract

The utility model provides a blockage detection device and a detection system for a heat transfer element of an air preheater, which relate to the field of air preheaters and comprise a full-pressure detection tube, a static-pressure detection tube, an external telescopic tube, an external roadster, an electromagnetic valve box, a proximity switch and a control module, wherein a pressure transmitter is arranged in the electromagnetic valve box; the running vehicle outside the furnace drives the telescopic pipe outside the furnace and the electromagnetic valve box to move back and forth on the bracket outside the furnace, so as to drive the full-pressure detection pipe and the static-pressure detection pipe 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 detection device adopts a movable dynamic pressure detection principle, can carry out online movement detection, detects the dynamic pressure value in each heat transfer element packet area, is arranged at the smoke outlet position of the air preheater, accurately positions the blocking position by detecting the dynamic pressure data of the set position of each heat transfer element and comparing the dynamic pressure data with the original data, and provides judgment and purging basis for purging in the later period.

Description

Air preheater heat transfer element blocks up detection device and detecting system

Technical Field

The utility model belongs to air preheater field especially relates to an air preheater heat transfer element blocks up detection device and detecting system.

Background

At present, the air preheater blocks up and is the pain point of unit operation always, and its jam reason also is manifold, along with boiler denitrification facility popularizes in a large number and uses, and the ammonium bisulfate that residual ammonia and sulfur trioxide reaction produced in the flue gas will produce serious negative effects to rotary preheater, and corruption and blocking phenomenon can appear in preheater heat transfer element.

In the near phase, the blockage problem of the air preheater is intelligently processed, the specific position of the blockage of the heat transfer element of the air preheater needs to be detected, the initial judgment is mainly carried out by adopting modes such as camera shooting visualization and the like at present, the judgment result is greatly interfered by the depth of the running environment and the blockage condition, the accurate positioning cannot be realized, and the difficulty is brought to the subsequent processing.

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 order to solve the technical problem, the utility model provides an air preheater heat transfer element blocks up detection device, including total pressure detecting tube, static pressure detecting tube, the flexible pipe outside the stove, sports car outside the stove and solenoid valve case, the solenoid valve case with the sports car outside the stove is located the outside of air preheater casing, the sports car outside the stove is fixed on the flexible pipe outside the stove, set up the through-hole on the air preheater casing, the flexible pipe outside the stove one end with the solenoid valve case is connected, and the other end inserts the inside that the through-hole got into the air preheater casing, total pressure detecting tube with the static pressure detecting tube passes in proper order through-hole on the air preheater casing, the flexible pipe outside the stove with the solenoid valve case is connected, total pressure detecting tube with all set up the solenoid valve on the static pressure detecting tube, the switch of solenoid valve case control solenoid valve, set up pressure transmitter in the solenoid valve case.

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.

Further, 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.

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.

And further, the device also comprises a back-blowing pipe, wherein the back-blowing pipe is communicated with the full-pressure detection pipe and the static-pressure detection pipe, and when the device is not detected, an electromagnetic valve of the back-blowing pipe is opened, and compressed air is introduced for back-blowing to prevent the pipeline from being blocked.

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 utility model provides an air preheater heat transfer element blocks up detecting system, block up detection device, proximity switch and control module including air preheater heat transfer element, proximity switch is located the pivot side of air preheater rotor, the outside of pivot set up with the air preheater in the storehouse check position of every rotor all correspond the sheetmetal, 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 connects.

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 take notes a numerical value respectively, for the storehouse check number that corresponds.

Has the advantages that:

the utility model provides an air preheater heat transfer element blocks up detection device, including the total pressure detecting tube, the static pressure detecting tube, the flexible pipe outside the stove, sportsman and solenoid valve case outside the stove, solenoid valve case and the outside roadster of stove are located the outside of air preheater casing, the sportsman outside the stove is fixed on the flexible pipe outside the stove, set up the through-hole on the air preheater casing, the one end and the solenoid valve case of the flexible pipe outside the stove are connected, the inside that the other end is movably inserted the through-hole and gets into the air preheater casing, total pressure detecting tube and static pressure detecting tube pass the through-hole on the air preheater casing in proper order, the flexible pipe outside the stove is connected with the solenoid valve case, all set up the solenoid valve on total pressure detecting tube and the static pressure detecting tube, set up pressure transmitter in the solenoid valve case. The heat transfer element blockage detection system comprises an air preheater heat transfer element blockage detection device, a proximity switch and a control module, wherein the proximity switch is positioned on the side edge of a rotating shaft of a rotor of the air preheater, a metal sheet corresponding to the bin position of each rotor in the air preheater is arranged on the outer side of the rotating shaft, and the control module is connected with the air preheater heat transfer element blockage detection device and the proximity switch.

The detection device adopts a movable dynamic pressure detection principle, can carry out online movement detection, detects the dynamic pressure value in each heat transfer element packet area, is arranged at the smoke outlet position of the air preheater, accurately positions the blocking position by detecting the dynamic pressure data of the set position of each heat transfer element and comparing the dynamic pressure data with the original data, and provides judgment and purging basis for purging in the later period. Compared with a fixed structure, the movable heat transfer element blockage detection system 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;

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 rotating shaft; 14. a rotor; 15. 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. 1-2, in a preferred embodiment, the present invention provides a blockage detection device for a heat transfer element of an air preheater, comprising three full-pressure detection tubes 1, a static pressure detection tube 2, an external extension tube 10, an external carriage 5, an electromagnetic valve box 4, an external sealing sleeve 7, an internal supporting tube 8 and a back-blowing tube 3, wherein the electromagnetic valve box 4 and the external carriage 5 are located outside an air preheater housing 11, the external extension tube 10 is movable relative to the air preheater housing, the external carriage 5 is fixedly mounted on the external extension tube 10 to drive the external extension tube 10 and the electromagnetic valve box 4 to move back and forth; a through hole is formed in an air preheater shell 11, an outer furnace sealing sleeve 7 is welded at the through hole in a sealing mode, a supporting tube 8 in a furnace is located in the air preheater shell 11 and sleeved on the outer side of an outer furnace extension tube and fixed on the air preheater shell 11, one end of an outer furnace extension tube 10 is connected with an electromagnetic valve box 4, the other end of the outer furnace extension tube penetrates through the outer furnace sealing sleeve 7 and enters the supporting tube 8 in the furnace, the outer furnace extension tube 10 can move in the outer furnace sealing sleeve 7 and the supporting tube 8 in the furnace, a full-pressure detection tube 1 and a static pressure detection tube 2 sequentially penetrate through the supporting tube 8 in the furnace, the through hole in the air preheater shell 11 and the outer furnace extension 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 tube 10 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 tube 1 and the static-pressure detection tube 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 through hole is arranged at the corresponding position of the shell 11 of the air preheater and the external sealing sleeve 7 of the furnace is sealed and welded, the full pressure detection tube 1 and the static pressure detection tube 2 penetrate through the external extension tube 10 of the furnace and are connected and fixed 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 sealed and fixed by the external sealing sleeve 7 of the furnace, and the external extension tube 10 of the furnace is used for 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 10 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 utility model provides an air preheater heat transfer element blocks up detecting system, block up detection device including air preheater heat transfer element, proximity switch 9 and control module, proximity switch 9 is located air preheater rotor 14's pivot 13 side, the outside of pivot 13 sets up a plurality of and the interior 12 position of storehouse check of every rotor 14 of air preheater sheetmetal 15 that correspond, the quantity of storehouse check is the same with the quantity of sheetmetal, control module blocks up detection device and proximity switch 9 with air preheater heat transfer element and is connected, the removal of control module control off-furnace sports car 5 with open and stop, like the direction of removal, the displacement volume.

In the embodiment, the blockage detection device for the heat transfer element of the air preheater is arranged at the position of a flue of an 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 area. The element bag is placed in the bin 12; the proximity switch 9 is fixed, the metal sheet 15 is fixed with the rotating shaft 13, the air preheater rotor 14 and the rotating shaft rotate synchronously, the position of the bin 12 of each rotor 14 in the air preheater corresponds to one metal sheet 15, in the rotating process of the rotor 14 and the rotating shaft, when one metal sheet 15 on the outer side of the rotating shaft passes through the proximity switch, the proximity switch 9 records one numerical value, and the corresponding bin number of the rotor 14 is recorded through the proximity switch 9. As shown in fig. 3 to 5, one air preheater rotor 14 is divided into 48 sector areas, the number of the bin areas 12 is 48 as the same as the number of the metal sheets 15, each sector area is also divided into small bin areas from a to F, A, B, C is defined as an inner area, D, E, F is defined as an outer area, the rotor 14 rotates continuously when the air preheater operates, when the element blockage detection device starts to operate, the proximity switches 9 start to count continuously at the same time, at a certain time, when the air preheater heat transfer element blockage detection device detects the blockage of the B area of the bin areas 12, the proximity switches send the recorded bin numbers 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 bin areas 12 detection processes are completed, the blockage detection device can converge the dynamic pressure values and the corresponding coordinate values of all the bin areas 12 of the air preheater heat transfer element into the movement of the whole bin rotor 12 And (4) pressure data distribution.

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.

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 (6)

1. The blockage detection device for the heat transfer element of the air preheater is characterized by comprising a full-pressure detection tube (1), a static-pressure detection tube (2), an external telescopic tube (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 tube (10), a through hole is formed in the air preheater shell (11), one end of the external telescopic tube (10) is connected with the electromagnetic valve box (4), the other end of the external telescopic tube is inserted into the through hole to enter the air preheater shell (11), the full-pressure detection tube (1) and the static-pressure detection tube (2) sequentially penetrate through the through hole in the air preheater shell (11), the external telescopic tube (10) is connected with the electromagnetic valve box (4), and the static-pressure detection tube (1) and the static-pressure detection tube (2) are respectively provided with an electromagnetic valve, and a pressure transmitter is arranged in the electromagnetic valve box (4).

2. The air preheater heat transfer element clogging detection apparatus according to claim 1, wherein the full pressure detection tube (1) and the static pressure detection tube (2) are connected to the pressure transmitter to obtain a dynamic pressure value at a detection position.

3. The air preheater heat transfer element clogging detection device according to claim 2, wherein one end of the full pressure detection tube (1) is a 90 ° bend.

4. The air preheater heat transfer element clogging detection device according to claim 3, further comprising a blowback pipe (3), wherein the blowback pipe (3) communicates with the full pressure detection pipe (1) and the static pressure detection pipe (2).

5. The air preheater heat transfer element clogging detection apparatus according to claim 4, wherein said running outside furnace (5) moves on a furnace outside carriage (6).

6. An air preheater heat transfer element blockage detection system is characterized by comprising the air preheater heat transfer element blockage detection device, a proximity switch (9) and a control module according to claim 5, wherein the proximity switch (9) is arranged on the side edge of a rotating shaft (13) of an air preheater rotor (14), metal sheets (15) corresponding to the positions of bin lattices (12) of each rotor (14) in an air preheater are arranged on the outer side of the rotating shaft (13), the number of the bin lattices (12) is the same as that of the metal sheets (15), and the control module is connected with the air preheater heat transfer element blockage detection device and the proximity switch (9).

Images