CN215637293U

CN215637293U - Air preheater

Info

Publication number: CN215637293U
Application number: CN202121086513.0U
Authority: CN
Inventors: 金生祥; 徐义巍; 张劲松; 李前宇; 何川; 李俊; 潘作为; 张宏元; 李大明; 王永刚; 白秀春; 孙志坚; 康正文; 邢景伟; 孙树春; 张鹏飞; 王科; 吴鑫瑞; 高立业
Original assignee: Inner Mongolia Daihai Electric Power Generation Co ltd; Beijing Jingneng Power Co Ltd
Current assignee: Inner Mongolia Daihai Electric Power Generation Co ltd; Beijing Jingneng Power Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-25
Anticipated expiration: 2031-05-19

Abstract

The utility model relates to an air preheater, comprising: the dust cleaning assembly comprises a water spraying device, a high-pressure water supply device and an adjusting mechanism, wherein the water spraying device is located below the air preheater body, the adjusting mechanism is used for adjusting the horizontal position of the water spraying device, and a water outlet of the high-pressure water supply device is communicated with a water inlet of the water spraying device. The air preheater disclosed by the utility model can be used for cleaning the interior of the air preheater through the ash removal component, is convenient to operate, saves time and labor and has high safety.

Description

Air preheater

Technical Field

The utility model belongs to the technical field of heat exchangers, and particularly relates to an air preheater.

Background

The air preheater is a heating surface for preheating air before entering the boiler to a certain temperature by smoke in a flue at the tail part of the boiler through internal radiating fins, is equipment for improving the heat exchange performance of the boiler and reducing energy consumption, and is often used for power station boilers. The rotary air preheater can slowly rotate during operation, smoke can enter the smoke side of the air preheater and then is discharged, heat carried in the smoke can be absorbed by radiating fins in the air preheater, then the air preheater slowly rotates, the radiating fins move to the air side, heat is transferred to air in front of a boiler, the air side is reached, and then the heat is transferred to the air in front of the boiler. On one hand, in the ignition starting process of the boiler, because the temperature of a hearth at the initial stage is lower, the combustion efficiency of fuel oil and coal powder is lower, the burnout is poor, a large amount of unburned coal powder and oil mist flow along with smoke and can be accumulated on a heat storage sheet of an air preheater, the ignition of the air preheater can be possibly caused, and the safe operation of the boiler is influenced; on the other hand, because the air preheater rotor is continuous pivoted at the operation process, the temperature rises gradually when the heat accumulation board rotates the flue gas side, and the heat accumulation board gets into the air side afterwards, is cooled off in the air side, and the temperature descends gradually, when the heat accumulation was arrived the flue gas side again, vapor, buggy and the oil mist in the flue gas condensed on cold junction heat exchange element, and the adhesion ash content aggravates the deposition.

The existing rotary air preheater generally adopts a soot blowing mode to clean a heat storage device, the cleaning effect is poor, the dirt on the heat storage device can still be obviously increased along with the prolonging of the running time of an air preheater, so that the heat exchange efficiency of the air preheater is directly influenced and the blockage is formed, and the resistance of the smoke side and the air side of the air preheater is increased due to the blockage of the air preheater, so that the following problems are derived: 1) the resistance of the air preheater rises to seriously affect the running safety of the unit, and the non-stop occurrence probability of the unit is greatly increased; 2) the resistance of the air preheater is increased to cause insufficient allowance of a draught fan and reduce the load carrying capacity of the unit; 3) the power consumption of a primary fan, a blower and a draught fan is increased due to the increase of the resistance of the air preheater; 4) the ash blockage of the air preheater causes the surface pollution of a heat exchange element to reduce the heat exchange capacity of the air preheater. 5) The cold end wall of the air preheater is too low in temperature, so that the cold end heat exchange element of the air preheater generates a low-temperature corrosion problem, and the normal operation of the air preheater is influenced. Therefore, in the prior art, in order to avoid serious blockage, after the air preheater runs for a period of time, the air preheater is often washed by manually holding a pipe on the spot, so that the operation is inconvenient, time and labor are wasted, and the safety problem exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air preheater to solve the technical problem that a smoke channel of an air preheater is blocked in the prior art.

The specific solution provided by the utility model is as follows:

the utility model provides an air preheater, comprising: the dust cleaning component comprises a water spraying device and an adjusting mechanism, wherein the water spraying device is located below the air preheater body, and the adjusting mechanism is used for adjusting the horizontal position of the water spraying device.

Based on the air preheater provided by the utility model, the water spraying device 31 is arranged at the cold end of the air preheater body (namely below the air preheater body), so that the air preheater can be used for online washing of the air preheater and offline washing of the air preheater, the problem that a person can enter for washing when the temperature in the air preheater is lowered during the prior offline washing is solved, the time is saved, the safety is ensured, the manpower is saved, and the whole washing efficiency and the washing safety are improved; and can be to water jet equipment's horizontal position through adjustment mechanism, when needs wash, can be with water jet equipment water spray needs adjust water jet equipment's position, make it be located under the air preheater body cold end, then open high pressure water supply installation and wash slowly rotatory air preheater inside, and can adjust water jet equipment's position as required, change the position that washes, improve abluent effect, it is convenient to wash, the cleaning efficiency is high.

On the basis of the scheme, the utility model can be further improved as follows:

furthermore, the water spraying device is a high-pressure washing water gun and is communicated with a water outlet of the high-pressure water pump through a high-pressure hose. .

Use current high pressure resistant high pressure to wash squirt, high-pressure hose and high-pressure water pump and wash, simple structure, sturdy and durable, convenient to use and wash effectually, from this, when needs wash, adjust the horizontal position of high-pressure squirt rifle head, the rifle head is to the inside water spray of air preheater, washs.

Optionally, the water spraying device comprises a nozzle and a steel pipe, wherein the nozzle is arranged at one end of the steel pipe, and the other end of the steel pipe is connected with the high-pressure water pump through a high-pressure hose.

The inside of the air preheater can be cleaned by spraying water through the nozzle and the steel pipe.

Furthermore, the adjusting mechanism comprises a support frame, a sliding block and a driving mechanism, the sliding block is connected with the support frame in a sliding mode along the horizontal direction, the driving mechanism drives the sliding block to slide, the water spraying device is fixed on the sliding block, and the driving mechanism is arranged on the support frame.

Therefore, the driving mechanism drives the sliding block to slide along the horizontal direction, the sliding block drives the water spraying device 31 to move towards the air preheater body until the water spraying device enters the lower part of the air preheater body, the water spraying device starts to wash, and after the water spraying device finishes washing, the driving mechanism drives the sliding block to move in the opposite direction, so that the water spraying device 31 is driven to be far away from the air preheater body.

Further, the driving mechanism is a slider-crank mechanism, the slider-crank mechanism comprises a crank, a first driving device for driving the crank to rotate, and a first connecting rod, one end of the first connecting rod is hinged to the slider, and the other end of the first connecting rod is hinged to the crank.

The crank is driven to rotate through the first driving device, the crank drives the first connecting rod to rotate around the hinged position of the first connecting rod and the hinged position of the crank and the first connecting rod, and the first connecting rod drives the sliding block to move, so that the water spraying device is driven to move, and the position of the water spraying device is adjusted.

Specifically, the first driving device is a motor or a rotating handle.

Specifically, the motor is fixed in on the support frame, on the crank was fixed in the motor shaft, the motor shaft rotated to drive the crank rotation and rotate.

Optionally, actuating mechanism includes pivot, connecting block, second connecting rod and drive pivot pivoted second drive arrangement, the pivot rotates with the support frame to be connected, the connecting block with the pivot spiro union, the one end of second connecting rod with the slider is articulated, the other end of second connecting rod with the connecting block is articulated.

Based on the air preheater provided by the utility model, the rotating shaft can also be driven to rotate through the second driving mechanism, so that the connecting block in threaded connection with the rotating shaft is driven to move along the axial direction of the rotating shaft, the sliding block is driven to move, and the position of the water spraying device is adjusted.

Further, the second driving device is a motor or a rotating handle.

Specifically, the second driving device is a forward and reverse rotating motor. Therefore, the position of the water spraying device can be adjusted by rotating the handle or opening the positive and negative motors.

Specifically, the bottom of the air preheater is provided with an ash bucket, and cleaned dust flows out of the bottom of the ash bucket along with water flow.

Drawings

Fig. 1 is a schematic view of the structure of an embodiment of the present invention when no flushing is performed.

Fig. 2 is a schematic structural view of a flushing operation according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram according to another embodiment of the present invention.

In the accompanying fig. 1-3, the components represented by the respective reference numerals are as follows:

1. an air preheater body;

2. an ash hopper;

3. a soot cleaning assembly; 31. a water spraying device; 32. a high pressure water pump; 33. a high pressure hose;

4. a support frame; 41. a first link; 42. a slider; 43. a crank; 44. a first driving device; 45. a rotating shaft; 46. a second link; 47. connecting blocks; 48. a second driving device.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The utility model is described below with reference to specific embodiments in conjunction with fig. 1-3.

Referring to fig. 1, an air preheater according to the present invention includes: the dust cleaning device comprises an air preheater body 1 and a dust cleaning component 3, wherein the dust cleaning component 3 comprises a water spraying device 31 positioned below the air preheater body 1 and an adjusting mechanism for adjusting the horizontal position of the water spraying device 31. Based on the air preheater provided by the utility model, the water spraying device 31 is arranged at the cold end of the air preheater body, namely below the air preheater body, so that the air preheater can be used for online washing of the air preheater and offline washing of the air preheater, and the problem that only a person can enter the air preheater to wash when the temperature in the air preheater is reduced during the prior offline washing is solved, so that the time is saved, the safety is ensured, the manpower is saved, and the whole washing efficiency and the washing safety are improved; and can be to water jet equipment's horizontal position through adjustment mechanism, when needs wash, can be with water jet equipment water spray needs adjust water jet equipment's position, as shown in fig. 2, make it be located air preheater body cold end under, then open high pressure water supply installation and wash the inside heat accumulation device of slow rotatory air preheater, and can adjust water jet equipment's position as required, change the position of washing, improve abluent effect, it is convenient to wash, the cleaning efficiency is high.

Based on the air preheater provided by the embodiment of the utility model, the water spraying device 31 is a high-pressure washing water gun, and the water spraying device 31 is communicated with a water outlet of a high-pressure water pump 32 through a high-pressure hose 33.

Use current high pressure resistant high pressure to wash squirt, high-pressure hose 33 and high-pressure water pump 32 and wash, simple structure, sturdy and durable, convenient to use and wash effectually, from this, when needs wash, adjust the horizontal position of high-pressure squirt rifle head, the rifle head is to the inside water spray of air preheater, washs.

Optionally, the water spraying device 31 includes a nozzle and a steel pipe, the nozzle is disposed at one end of the steel pipe, and the other end of the steel pipe is connected to the high-pressure water pump through a hose. The inside of the air preheater can be cleaned by spraying water through the nozzle and the steel pipe.

As shown in fig. 1, according to the air preheater of the embodiment of the present invention, the adjusting mechanism includes a supporting frame 4, a sliding block 42 slidably connected to the supporting frame 4 along a horizontal direction, and a driving mechanism for driving the sliding block 42 to slide, the water spraying device 31 is fixed on the sliding block 42, and the driving mechanism is disposed on the supporting frame. The driving mechanism drives the sliding block to slide along the horizontal direction, the sliding block drives the water spraying device 31 to move towards the air preheater body until the water spraying device enters the lower portion of the air preheater body 1, then the water spraying device starts to wash, and after the water spraying device finishes washing, the driving mechanism drives the sliding block to move in the opposite direction, so that the water spraying device 31 is driven to be far away from the air preheater body.

As shown in fig. 1, according to the air preheater of an embodiment of the present invention, the driving mechanism is a slider-crank mechanism, the slider-crank mechanism includes a crank 43, a first driving device 44 for driving the crank 43 to rotate, and a first link 41, one end of the first link 41 is hinged to the slider 42, and the other end of the first link 41 is hinged to the crank 43. The crank is driven to rotate through the first driving device, the crank drives the first connecting rod to rotate around the hinged position of the first connecting rod and the second connecting rod (namely the hinged position of the crank and the first connecting rod rotates), and the first connecting rod drives the sliding block to move, so that the water spraying device is driven to move, and the position of the water spraying device is adjusted.

Specifically, the first driving device is a motor or a rotating handle.

Optionally, as shown in fig. 3, based on the air preheater according to another embodiment of the present invention, the driving mechanism includes a rotating shaft 45, a connecting block 47, a second connecting rod 46, and a second driving device 48 for driving the rotating shaft 45 to rotate, the rotating shaft 45 is rotatably connected to the supporting frame 4, the connecting block 47 is screwed with the rotating shaft 45, one end of the second connecting rod 46 is hinged to the sliding block 42, and the other end of the second connecting rod 46 is hinged to the connecting block 47. Based on the air preheater provided by the utility model, the rotating shaft can also be driven to rotate through the second driving mechanism, so that the connecting block in threaded connection with the rotating shaft is driven to move along the axial direction of the rotating shaft, the sliding block is driven to move, and the position of the water spraying device is adjusted.

According to the air preheater provided by the embodiment of the utility model, the second driving device is a motor or a rotating handle. Specifically, the second driving device is a forward and reverse rotating motor. Therefore, the position of the water spraying device can be adjusted by rotating the handle or opening the positive and negative motors.

Specifically, the bottom of the air preheater is provided with an ash bucket 2, and cleaned dust flows out from the bottom of the ash bucket along with water flow.

Preferably, the ash bucket and the support frame 4 are integrally and fixedly connected.

Although embodiments of the present invention have been described in detail above, those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An air preheater, comprising: the air preheater comprises an air preheater body (1) and an ash removal component (3), wherein the ash removal component (3) comprises a water spraying device (31) located below the air preheater body (1) and an adjusting mechanism for adjusting the horizontal position of the water spraying device (31).

2. The air preheater according to claim 1, wherein the water spray device (31) is a high-pressure flushing water gun, and the water spray device (31) is communicated with a water outlet of a high-pressure water pump (32) through a high-pressure hose (33).

3. The air preheater according to claim 1, wherein the adjusting mechanism comprises a support frame (4), a sliding block (42) connected with the support frame (4) in a sliding manner along a horizontal direction, and a driving mechanism for driving the sliding block (42) to slide, the water spraying device (31) is fixed on the sliding block (42), and the driving mechanism is arranged on the support frame.

4. The air preheater according to claim 3, wherein the driving mechanism is a crank-slider mechanism, the crank-slider mechanism comprises a crank (43), a first driving device (44) for driving the crank (43) to rotate, and a first connecting rod (41), one end of the first connecting rod (41) is hinged with the slider (42), and the other end of the first connecting rod (41) is hinged with the crank (43).

5. The air preheater according to claim 3, wherein the driving mechanism comprises a rotating shaft (45), a connecting block (47), a second connecting rod (46) and a second driving device (48) for driving the rotating shaft (45) to rotate, the rotating shaft (45) is rotatably connected with the support frame (4), the connecting block (47) is in threaded connection with the rotating shaft (45), one end of the second connecting rod (46) is hinged with the sliding block (42), and the other end of the second connecting rod (46) is hinged with the connecting block (47).

6. Air preheater according to claim 5, characterized in that the second drive means (48) is a motor or a rotary handle.