CN214745870U

CN214745870U - Flue gas waste heat recovery device

Info

Publication number: CN214745870U
Application number: CN202121186961.8U
Authority: CN
Inventors: 金国桦; 何红海; 叶宏
Original assignee: Huzhou South Tai Lake Thermoelectricity Co ltd
Current assignee: Huzhou South Tai Lake Thermoelectricity Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-16
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a flue gas waste heat recovery device, including one-level heat recovery device, one-level heat recovery device's exhanst gas outlet is equipped with the first three-way pipe of Y type, the top of first three-way pipe is equipped with the second three-way pipe of the shape of falling Y, the upside port of second three-way pipe is equipped with the pipe of discharging fume, one of them port of second three-way pipe downside passes through one of them port of first three-way pipe upside of first pipe connection, be equipped with first commentaries on classics board in the first pipeline, another port of second three-way pipe downside passes through another port of first three-way pipe upside of second pipe connection, be equipped with second grade heat recovery device on the second pipeline, be equipped with in the second pipeline with first commentaries on classics board vertically second commentaries on classics board, the second commentaries on classics board passes through actuating mechanism and connects first commentaries on classics board. The utility model has the advantages of the ash removal workload is less and the use cost is lower.

Description

Flue gas waste heat recovery device

Technical Field

The utility model belongs to a flue gas waste heat recovery device for a thermal power plant.

Background

Contain a large amount of waste heat in thermal power plant's the burning furnace exhaust flue gas, use flue gas waste heat recovery device to retrieve usually, for the rate of recovery that improves the waste heat as far as, flue gas waste heat recovery device has the waste heat recovery function more than the two-stage usually, like application number 201821932583.1's a flue gas waste heat recovery device, including one-level heat recovery device and second grade heat recovery device, has carried out secondary recovery to the waste heat, has improved the recovery efficiency of waste heat.

The existing flue gas waste heat recovery device has the advantages of high waste heat recovery efficiency, but has some defects, mainly lies in that the difference of the flue gas volume discharged by a thermal power plant day and night is large, in daytime, the power generation of the thermal power plant is large, the fuel consumption of an incinerator is fast, the discharge amount of the flue gas is large, the waste heat content in the flue gas is high, at this time, the high recovery rate of the waste heat can be recovered only by using two stages of heat recovery devices, but at night, the power generation of the thermal power plant is small, the fuel consumption of the incinerator is slow, the discharge amount of the flue gas is small, and the waste heat content in the flue gas is small, at this time, the waste heat can be better recovered only by using one stage of heat recovery device, the secondary heat recovery device does not actually recover much waste heat, but the flue gas still passes through the secondary heat recovery device, so that the soot in the flue gas still adheres to the secondary heat recovery device, the heat exchange capability of the secondary heat recovery device can be reduced, and the corrosion to the secondary heat exchange device can be aggravated, the ash removal frequency and the service life of the secondary heat recovery device are basically consistent with those of the primary heat recovery device, but actually, the secondary heat recovery device really has far shorter acting time than the primary heat recovery device, and the flue gas can be directly discharged without passing through the secondary heat recovery device when the secondary heat recovery device does not act, so that the ash removal frequency of the secondary heat recovery device is reduced, the service life of the secondary heat recovery device is prolonged, and the ash removal workload and the use cost of the flue gas waste heat recovery device are equivalently reduced.

Therefore, a flue gas waste heat recovery device with less ash removal workload and lower use cost is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flue gas waste heat recovery device. The utility model has the advantages of the ash removal workload is less and the use cost is lower.

The technical scheme of the utility model: the utility model provides a flue gas waste heat recovery device, including one-level heat recovery device, one-level heat recovery device's exhanst gas outlet is equipped with the first three-way pipe of Y type, the top of first three-way pipe is equipped with the second three-way pipe of the shape of falling Y, the upside port of second three-way pipe is equipped with the pipe of discharging fume, one of them port of second three-way pipe downside passes through one of them port of first three-way pipe upside of first pipe coupling, be equipped with first commentaries on classics board in the first pipeline, another port of second three-way pipe downside passes through another port of first three-way pipe upside of second pipe coupling, be equipped with second grade heat recovery device on the second pipeline, be equipped with in the second pipeline with first commentaries on classics board vertically second commentaries on classics board, the second commentaries on classics board passes through actuating mechanism and connects first commentaries on classics board.

In the flue gas waste heat recovery device, the first rotating plate is located on the horizontal side of the second rotating plate, first rotating shafts connected with the first pipeline are arranged on two sides of the first rotating plate, and second rotating shafts connected with the second pipeline are arranged on two sides of the second rotating plate;

the driving mechanism comprises a motor located between the first pipeline and the second pipeline, the motor is fixed between the first pipeline and the second pipeline through the rack, the output end of the motor is provided with a first bevel gear, two sides of the first bevel gear are respectively meshed with a second bevel gear and a third bevel gear, the second bevel gear is fixed with one of the first rotating shafts, and the third bevel gear is fixed with one of the second rotating shafts.

In the above flue gas waste heat recovery device, the motor is a speed reduction motor.

In the flue gas waste heat recovery device, the upper edge of the first rotating plate and the upper edge and the lower edge of the second rotating plate are provided with chamfers.

Among the aforementioned flue gas waste heat recovery device, still including being fixed in the digital display thermometer in the first tee bend outside, be connected with temperature probe on the digital display thermometer, temperature probe stretches into in the first tee bend.

Compared with the prior art, the utility model has the advantages that two pipelines are arranged at the rear end of the flue gas of the primary heat recovery device, the rotating plates are arranged in the two pipelines, one of the pipelines is provided with the secondary heat recovery device, when the generated energy of the thermal power plant is large and the smoke discharge of the incinerator is large, the flue gas discharged from the primary heat recovery device is subjected to waste heat recovery again through the secondary heat recovery device, so that the high recovery efficiency of the waste heat is ensured; when thermal power plant generated energy is little, burn the burning furnace and discharge fume when little, change the angle of two pipeline internal rotation boards through actuating mechanism, can make the exhaust flue gas of following one-level heat recovery device directly discharge through second grade heat recovery device discharge, thereby avoid the increase of cigarette ash in the second grade heat recovery device, the deashing frequency that has reduced second grade heat recovery device and the corruption that alleviates second grade heat recovery device, the deashing frequency that makes second grade heat recovery device needs is low, long service life, this deashing work load and the use cost who has increased flue gas waste heat recovery device in other words. Therefore, the utility model has the advantages of the deashing work load is less and use cost is lower.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The labels in the figures are: 1-first-stage heat recovery device, 2-first three-way pipe, 3-second three-way pipe, 4-smoke exhaust pipe, 5-first pipeline, 6-first rotating plate, 7-second pipeline, 8-second-stage heat recovery device, 9-second rotating plate, 10-first rotating shaft, 11-second rotating shaft, 12-motor, 13-frame, 14-first bevel gear, 15-second bevel gear, 16-third bevel gear, 17-chamfer, 18-digital display thermometer and 19-temperature probe.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Examples are given. The utility model provides a flue gas waste heat recovery device, as shown in figure 1, including one-level heat recovery device 1, the exhanst gas outlet of one-level heat recovery device 1 is equipped with the first three-way pipe 2 of Y type, the top of first three-way pipe 2 is equipped with the second three-way pipe 3 of the shape of falling Y, the upside port of second three-way pipe 3 is equipped with smoke pipe 4, one of them port of second three-way pipe 3 downside passes through one of them port of first pipeline 5 connection 2 upside of first three-way pipe, be equipped with the first rotor 6 of level direction in the first pipeline 5, another port of second three-way pipe 3 downside passes through another port of second pipeline 7 connection 2 upside of first three-way pipe, be equipped with second grade heat recovery device 8 on the second pipeline 7, be equipped with the second rotor 9 with first rotor 6 vertically in the second pipeline 7, second rotor 9 passes through actuating mechanism and connects first rotor 6.

The first rotating plate 6 is positioned on the horizontal side of the second rotating plate 9, a first rotating shaft 10 connected with the first pipeline 5 is arranged on each of two sides of the first rotating plate 6, and a second rotating shaft 11 connected with the second pipeline 7 is arranged on each of two sides of the second rotating plate 9;

the driving mechanism comprises a motor 12 located between the first pipeline 5 and the second pipeline 7, the motor 12 is fixed between the first pipeline 5 and the second pipeline 7 through a rack 13, a first bevel gear 14 is arranged at the output end of the motor 12, two sides of the first bevel gear 14 are respectively meshed with a second bevel gear 15 and a third bevel gear 16, the second bevel gear 15 is fixed with one of the first rotating shafts 10, and the third bevel gear 16 is fixed with one of the second rotating shafts 11.

The motor 12 is a reduction motor.

And the upper edge of the first rotating plate 6 and the upper edge and the lower edge of the second rotating plate 9 are provided with chamfers 17.

The three-way pipe type temperature measuring device further comprises a digital display thermometer 18 fixed on the outer side of the first three-way pipe 2, a temperature probe 19 is connected to the digital display thermometer 18, and the temperature probe 19 extends into the first three-way pipe 2. The model WSS-481 of the digital display thermometer is provided with a temperature probe 19, and the temperature detection range is-80 ℃ to 500 ℃.

The smoke exhaust pipe 4 enables the smoke subjected to waste heat recovery to have only one final exhaust port, so that the smoke is convenient to recover and reprocess. Because all inevitablely because of flue gas adhesion cigarette ash on the inner wall of first pipeline 5 and second pipeline 7, make correspond the pipeline and correspond to change between the board adhesion together, lead to corresponding the turning resistance who changes the board can the grow, motor 12 adopts gear motor, is for improving motor 12's output torque, makes to correspond to change the board and can overcome the turning resistance, normal rotation, thereby reduces the utility model discloses a fault rate. The chamfer 17 on the rotating plate makes the rotating plate thick inside and thin outside, and the diameter of the rotating plate can be enlarged while the strength of the rotating plate is kept, so that the gap between the rotating plate and the pipeline is reduced, and the sealing property is improved.

The working principle is as follows: on daytime, thermal power plant generated energy is big, when burning furnace discharge fume is big, first commentaries on classics board 6 keeps the horizontality, make the shutoff of first pipeline 5, second commentaries on classics board 9 keeps vertical, second pipeline 7 is unblocked, burn burning furnace exhaust flue gas through one-level heat reclamation device 1, carry out the waste heat recovery of first-level, again through first three-way pipe 2, second pipeline 7, second grade heat reclamation device 8, second three-way pipe 3 and discharge fume pipe 4 discharge, the flue gas carries out the waste heat recovery of second grade at second grade heat reclamation device 8.

At night, when the generated energy of a thermal power plant is small and the smoke discharge of an incinerator is small, a motor 12 is started, the motor 12 drives a second bevel gear 15 and a third bevel gear 16 to rotate at a constant speed through a first bevel gear 14, the second bevel gear 15 and the third bevel gear 16 drive a first rotating plate 6 and a second rotating plate 9 to rotate respectively until the first rotating plate 6 is in a vertical state and the second rotating plate 9 is in a horizontal state, at the moment, a first pipeline 5 is smooth, a second pipeline 7 is blocked, and after smoke is discharged from a primary heat recovery device 1, the smoke is discharged from a first three-way pipe 2, the first pipeline 5, a second three-way pipe 3 and a smoke discharge pipe 4 and does not pass through a secondary heat recovery device 8, and the discharge path of the smoke is changed.

Detect the temperature from 1 exhaust flue gas of one-level heat recovery device through temperature probe 19 to show the temperature on digital display thermometer 18, only when the temperature of 1 exhaust flue gas of one-level heat recovery device is less than a certain value, just make the flue gas from first pipeline 5 process, can in time avoid waste heat loss, can in time reduce second grade heat recovery device 8's operating time again, thereby further reduce second grade heat recovery device 8's deashing frequency and improve life, thereby make the utility model discloses a deashing work load is less and use cost is lower.

Claims

1. The utility model provides a flue gas waste heat recovery device which characterized in that: the smoke-gas heat recovery device comprises a first-level heat recovery device (1), a smoke-gas outlet of the first-level heat recovery device (1) is provided with a first Y-shaped three-way pipe (2), a second Y-shaped three-way pipe (3) is arranged above the first three-way pipe (2), a smoke exhaust pipe (4) is arranged at the port on the upper side of the second three-way pipe (3), one port on the lower side of the second three-way pipe (3) is connected with one port on the upper side of the first three-way pipe (2) through a first pipeline (5), a first rotating plate (6) is arranged in the first pipeline (5), the other port on the lower side of the second three-way pipe (3) is connected with the other port on the upper side of the first three-way pipe (2) through a second pipeline (7), a second-level heat recovery device (8) is arranged on the second pipeline (7), a second rotating plate (9) vertical to the first rotating plate (6) is arranged in the second pipeline (7), and the second rotating plate (9) is connected with the first rotating plate (6) through a driving mechanism.

2. The flue gas waste heat recovery device according to claim 1, characterized in that: the first rotating plate (6) is positioned on the horizontal side of the second rotating plate (9), a first rotating shaft (10) connected with the first pipeline (5) is arranged on each of two sides of the first rotating plate (6), and a second rotating shaft (11) connected with the second pipeline (7) is arranged on each of two sides of the second rotating plate (9);

the driving mechanism comprises a motor (12) located between a first pipeline (5) and a second pipeline (7), the motor (12) is fixed between the first pipeline (5) and the second pipeline (7) through a rack (13), first bevel gears (14) are arranged at the output ends of the motor (12), two sides of the first bevel gears (14) are respectively meshed with second bevel gears (15) and third bevel gears (16), the second bevel gears (15) are fixed with one of the first rotating shafts (10), and the third bevel gears (16) are fixed with one of the second rotating shafts (11).

3. The flue gas waste heat recovery device according to claim 2, characterized in that: the motor (12) is a reduction motor.

4. The flue gas waste heat recovery device according to claim 1, characterized in that: and the upper edge of the first rotating plate (6) and the upper edge and the lower edge of the second rotating plate (9) are provided with chamfers (17).

5. The flue gas waste heat recovery device according to claim 1, characterized in that: the three-way pipe is characterized by further comprising a digital display thermometer (18) fixed on the outer side of the first three-way pipe (2), the digital display thermometer (18) is connected with a temperature probe (19), and the temperature probe (19) extends into the first three-way pipe (2).