CN217179304U - Flue gas waste heat recovery device for soaking pit furnace - Google Patents

Abstract

The application relates to the technical field of soaking furnaces, and discloses a flue gas waste heat recovery device for a soaking furnace, which comprises a smoke outlet pipeline, a smoke exhaust pipeline, a hot air pipeline and a heat exchange mechanism for recovering the waste heat of smoke, the heat exchange mechanism comprises a heat exchange box, a heat exchange pipeline and a fan, the fan is fixedly connected on the heat exchange box, the air inlet of the fan is communicated with the atmosphere, the air outlet of the fan is communicated with the inside of the heat exchange box, the heat exchange pipeline is positioned in the heat exchange box, one end of the smoke outlet pipeline is communicated with the combustion chamber of the soaking pit furnace, the other end of the smoke outlet pipeline is communicated with the heat exchange pipeline, one end of the smoke exhaust pipeline is communicated with the heat exchange pipeline, the other end of the smoke exhaust pipeline is communicated with the chimney, one end of the hot air pipeline is communicated with the heat exchange box, and the other end of the hot air pipeline is communicated with a heat storage chamber of the soaking pit furnace. The application has the effect of improving the heat utilization rate in the soaking pit.

Description

Flue gas waste heat recovery device for soaking pit

Technical Field

The application relates to the field of soaking furnaces, in particular to a flue gas waste heat recovery device for a soaking furnace.

Background

The soaking pit furnace is used for heating and soaking steel ingots before rolling. The soaking furnace heats or keeps the temperature of the steel ingot for a certain time before the initial rolling, and the internal temperature of the steel ingot is uniform through thermal diffusion, so that the soaking furnace is suitable for metal plastic processing. The hearth is cuboid, and steel ingots are vertically placed in the furnace. The soaking pit furnace is mostly heated by gas fuel, and heavy oil can also be used. The soaking pit furnace is periodically operated, and the temperature system and the heat supply system of the soaking pit furnace change along with time. The soaking pit furnace is mainly used for soaking hot steel ingots after demoulding and can also be used for heating cold steel ingots.

At present, in the use process of a soaking pit furnace, most of smoke generated by combustion of gas fuel in a heating chamber is discharged to the external environment through a chimney.

In view of the above-mentioned related technologies, the inventor believes that the flue gas discharged from the chimney carries a large amount of heat, and the defect of heat waste in the soaking pit exists.

SUMMERY OF THE UTILITY MODEL

In order to alleviate the extravagant problem of heat in the soaking pit, this application provides a flue gas waste heat recovery device for soaking pit.

The application provides a pair of flue gas waste heat recovery device for soaking pit adopts following technical scheme:

the utility model provides a soaking pit is with flue gas waste heat recovery device, includes smoke outlet pipe way, exhaust pipe, hot-blast pipeline and is used for flue gas waste heat recovery's heat transfer mechanism, heat transfer mechanism includes heat transfer case, heat transfer pipeline and fan, fan fixed connection be in on the heat transfer case, the air inlet and the external environment intercommunication of fan, the gas outlet of fan with the inside intercommunication of heat transfer case, the heat transfer pipeline is located inside the heat transfer case, smoke outlet pipe way one end and soaking pit's combustion chamber intercommunication, smoke outlet pipe way other end with the heat transfer pipeline intercommunication, exhaust pipe one end with the heat transfer pipeline intercommunication, the exhaust pipe other end and chimney intercommunication, hot-blast pipeline one end with heat transfer case intercommunication, the hot-blast pipeline other end communicates with the regenerator of soaking pit.

Through adopting above-mentioned technical scheme, will go out tobacco pipe and heat transfer pipeline intercommunication, soaking pit exhaust flue gas is in going into the heat transfer pipeline of heat transfer incasement through going out tobacco pipe way, the fan inhales the heat transfer incasement with the outside air of heat transfer incasement, the air that gets into in the heat transfer incasement carries out the heat exchange with the flue gas in the heat transfer pipeline, the air after the heating is used in the heat accumulation chamber that enters into the soaking pit through hot-blast main, the flue gas after the cooling is discharged in the external environment after the exhaust pipe gets into the chimney, thereby alleviate soaking pit exhaust flue gas and take away a large amount of thermal problems, improve the thermal rate of utilization in the soaking pit.

Optionally, be provided with the reposition of redundant personnel mechanism on the play tobacco pipe, reposition of redundant personnel mechanism includes three-way valve and reposition of redundant personnel pipeline, the three-way valve intercommunication is in on the play tobacco pipe, reposition of redundant personnel pipeline one end with the three-way valve intercommunication, the reposition of redundant personnel pipeline other end with the discharge flue intercommunication, the three-way valve is right the flue gas in the play tobacco pipe is shunted.

Through adopting above-mentioned technical scheme, intercommunication three-way valve on going out the tobacco pipe way, three-way valve intercommunication have the reposition of redundant personnel pipeline, and the reposition of redundant personnel pipeline communicates with the exhaust pipe, and when the exhaust flue gas temperature of soaking pit is lower, heat exchange efficiency is lower, utilizes the three-way valve to communicate reposition of redundant personnel pipeline and soaking pit, makes the flue gas directly discharge through the chimney behind reposition of redundant personnel pipeline entering exhaust pipe, improves smoke exhaust efficiency.

Optionally, the three-way valve includes the valve body and is used for control the control lever of flue gas flow direction in the valve body, the A mouth and the B mouth of valve body all with go out tobacco pipe way intercommunication, the C mouth of valve body with go out tobacco pipe way intercommunication, the control lever with valve body threaded connection, reposition of redundant personnel mechanism still includes control assembly and temperature detection sensor, temperature detection sensor is located go out in the tobacco pipe way, temperature detection sensor is located one side that the three-way valve is close to the soaking pit, control assembly with the control lever is connected, temperature detection sensor with the control assembly electricity is connected.

By adopting the technical scheme, the temperature detection sensor is utilized to detect the temperature of the flue gas in the flue gas outlet pipeline, the temperature detection sensor is electrically connected with the control assembly, when the temperature detection sensor detects that the temperature of the flue gas is higher than the set temperature, the temperature detection sensor transmits a signal to the control assembly, and the control assembly drives the control rod to rotate, so that the port A and the port B of the valve body are communicated; when the temperature detection sensor detects that the temperature of the flue gas is lower than the set temperature, the temperature detection sensor transmits a signal to the control assembly, and the control assembly drives the control rod to rotate, so that the port A and the port C of the valve body are communicated.

Optionally, the control assembly includes motor and two limiting plates, two limiting plates parallel arrangement, two the limiting plate all with valve body fixed connection, two the limiting plate is located respectively the both sides of control lever, the output shaft of motor with the coaxial fixed connection of control lever, the motor is located two between the limiting plate, the shell and two of motor limiting plate sliding connection, the motor with the temperature detection sensor electricity is connected.

Through adopting above-mentioned technical scheme, two limiting plates of fixed connection on the valve body, sliding connection has the motor between two limiting plates, the coaxial fixed connection of main shaft and the control lever of motor, and temperature detect sensor transmits the signal to the motor, and the main shaft of motor rotates and drives the control lever and rotate to the realization is to the control of three-way valve.

Optionally, a heat insulation layer is arranged on the outer side of the smoke exhaust pipeline, and the heat insulation layer is fixedly connected with the smoke exhaust pipeline.

Through adopting above-mentioned technical scheme, at the outside fixed connection heat preservation of exhaust pipe, reduce the flue gas and remove the heat loss of in-process to the heat transfer incasement by the soaking pit.

Optionally, the heat exchange pipeline includes first connecting pipe, second connecting pipe and many heat exchange tubes, many the heat exchange tube intercommunication is in first connecting pipe with between the second connecting pipe, first connecting pipe with go out tobacco pipe intercommunication, the second connecting pipe with the exhaust pipe intercommunication, first connecting pipe is located and is close to the position at heat transfer case top, the second connecting pipe is located and is close to the position of heat transfer bottom of the case portion, first connecting pipe with the second connecting pipe all with heat transfer case fixed connection.

By adopting the technical scheme, the plurality of heat exchange tubes are communicated between the first connecting tube and the second connecting tube, smoke flowing into the first connecting tube through the smoke exhaust pipeline flows into the second connecting tube through the plurality of heat exchange tubes, and the smoke flows through the heat exchange tubes to exchange heat with air.

Optionally, the heat exchange tube is a serpentine coil.

Through adopting above-mentioned technical scheme, the removal route of extension flue gas in the heat transfer case makes the heat transfer between flue gas and the air more abundant, improves heat transfer mechanism's heat transfer effect.

Optionally, an electric control valve is arranged on the hot air pipeline, and the electric control valve is electrically connected with the temperature detection sensor.

Through adopting above-mentioned technical scheme, set up the automatically controlled valve on hot-blast main, when temperature detect sensor detected the flue gas temperature and is less than the settlement temperature, temperature detect sensor to the automatically controlled valve transmission signal, the automatically controlled valve seals hot-blast main, reduces the heat in the heat accumulation room through the hot-blast main ease to external possibility.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the combustion chamber of the soaking pit is communicated with the heat exchange pipeline through the smoke outlet pipeline, smoke enters the heat exchange pipeline in the heat exchange box through the smoke outlet pipeline, air outside the heat exchange box is sucked into the heat exchange box by the fan, the air entering the heat exchange box exchanges heat with the smoke in the heat exchange pipeline, the heated air enters the heat storage chamber of the soaking pit through the hot air pipeline for use, and the cooled smoke enters the chimney through the smoke exhaust pipeline and then is discharged to the external environment, so that the problem that a large amount of heat is taken away by the smoke exhausted by the soaking pit is solved, and the utilization rate of the heat in the soaking pit is improved;

2. the heat loss of the flue gas in the process of moving from the soaking pit to the heat exchange box is reduced by fixedly connecting the heat-insulating layer on the outer side of the smoke exhaust pipeline;

3. through setting up electric control valve on hot-blast main, when temperature detect sensor detected the flue gas temperature and is less than the settlement temperature, temperature detect sensor to electric control valve transmission signal, electric control valve seals hot-blast main, reduces the heat in the heat accumulation room through the hot-blast main ease outside possibility.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic diagram of a heat exchange pipeline section in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a shunt mechanism portion in an embodiment of the present application.

Reference numerals: 100. a smoke outlet pipeline; 200. a smoke exhaust duct; 300. a hot air duct; 400. a heat exchange mechanism; 410. a heat exchange box; 420. a heat exchange line; 421. a first connecting pipe; 422. a second connecting pipe; 423. a heat exchange pipe; 430. a fan; 500. a flow dividing mechanism; 510. a three-way valve; 511. a valve body; 512. a control lever; 520. a diversion pipeline; 530. a control component; 531. a motor; 532. a limiting plate; 540. a temperature detection sensor; 600. an electrically controlled valve; 700. soaking pit furnace; 710. a combustion chamber; 720. a regenerator; 800. and (4) a chimney.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a flue gas waste heat recovery device for soaking pit. Referring to fig. 1 and 2, the flue gas waste heat recovery device for the soaking pit furnace comprises a heat exchange mechanism 400, wherein the heat exchange mechanism 400 comprises a heat exchange box 410, the heat exchange box 410 is of a hollow cuboid structure, a heat exchange pipeline 420 is arranged inside the heat exchange box 410, a fan 430 is fixedly connected to the side wall of the heat exchange box 410, the air inlet of the fan 430 is communicated with the external environment, the air outlet of the fan 430 is communicated with the inside of the box body, and the fan 430 is used for guiding external air into the heat exchange box 410. The upper end of the heat exchange box 410 is fixedly connected with a smoke outlet pipeline 100, one end of the smoke outlet pipeline 100 is communicated with the heat exchange pipeline 420, and the other end of the smoke outlet pipeline 100 is communicated with a combustion chamber 710 of the soaking pit 700. The side wall of the heat exchange box 410 is fixedly connected with a smoke exhaust pipe 200, the smoke exhaust pipe 200 is located at a position close to the bottom of the heat exchange box 410, one end of the smoke exhaust pipe 200 is communicated with the heat exchange pipeline 420, and the other end of the smoke exhaust pipe 200 is communicated with the chimney 800. The side wall of the heat exchange box 410 is also fixedly connected with a hot air pipeline 300, the hot air pipeline 300 is positioned at a position close to the top of the heat exchange box 410, the hot air pipeline 300 is communicated with the inside of the heat exchange box 410, and one end of the hot air pipeline 300, which is far away from the heat exchange box 410, is communicated with a heat accumulation chamber 720 of the soaking pit 700.

Flue gas exhausted by the soaking pit 700 enters the heat exchange pipeline 420 in the heat exchange box 410 through the smoke outlet pipeline 100, the fan 430 sucks air outside the heat exchange box 410 into the heat exchange box 410, the air entering the heat exchange box 410 exchanges heat with the flue gas in the heat exchange pipeline 420, the heated air enters the heat storage chamber 720 of the soaking pit 700 through the hot air pipeline 300 for use, the cooled flue gas enters the chimney 800 through the smoke exhaust pipeline 200 and then is discharged into the external environment, the problem that a large amount of heat is taken away by the flue gas exhausted by the soaking pit 700 is solved, and the utilization rate of the heat in the soaking pit 700 is improved. The heat preservation is overlapped to the exhaust pipe 200 outside, and the outer wall fixed connection of heat preservation and exhaust pipe 200, the sponge heat preservation is chooseed for use to the heat preservation in this embodiment, utilizes the heat preservation to reduce the flue gas by soaking pit 700 to the heat transfer case 410 heat loss of removal in-process. The smoke outlet pipeline 100 is provided with the flow dividing mechanism 500, the flow dividing mechanism 500 is communicated with the smoke exhaust pipeline 200, when the temperature of smoke exhausted by the soaking pit 700 is low, the heat exchange efficiency is low, the smoke is directly guided into the smoke exhaust pipeline 200 by the flow dividing mechanism 500 and then is exhausted through the chimney 800, and the smoke exhaust efficiency is improved.

Referring to fig. 1 and 3, the diversion mechanism 500 includes a three-way valve 510, the three-way valve 510 is communicated with the smoke outlet pipe 100, the three-way valve 510 includes a valve body 511, the a button and the B port of the valve body 511 are both communicated with the smoke outlet pipe 100, a diversion pipeline 520 is fixedly connected to the valve body 511, one end of the diversion pipeline 520 is communicated with the C port of the valve body 511, and the other end of the diversion pipeline 520 is communicated with the smoke exhaust pipeline 200. A control rod 512 is screwed to the valve body 511, and the control rod 512 controls the conduction state in the valve body 511. The temperature detection sensor 540 is installed in the smoke outlet pipeline 100, the temperature detection sensor 540 is fixedly connected to the inner wall of the smoke outlet pipeline 100, and the temperature detection sensor 540 is located on one side of the three-way valve 510 close to the soaking pit 700. Install control assembly 530 on three-way valve 510, control assembly 530 includes two parallel arrangement's limiting plate 532, the equal fixed connection of two limiting plate 532 in the upper end of three-way valve 510, two limiting plate 532 are located the both sides of control lever 512 respectively, install motor 531 between two limiting plate 532, the main shaft and the coaxial fixed connection of control lever 512 of motor 531, the shell and the limiting plate 532 sliding connection of motor 531, motor 531 is connected with temperature detection sensor 540 electricity. The temperature detection sensor 540 is used for detecting the temperature of the smoke in the smoke outlet pipeline 100, the temperature detection sensor 540 is electrically connected with the motor 531, when the temperature detection sensor 540 detects that the temperature of the smoke is higher than a set temperature, the temperature detection sensor 540 transmits a signal to the motor 531, a main shaft of the motor 531 rotates to drive the control rod 512 to rotate, and the port A and the port B of the valve body 511 are communicated; when the temperature detecting sensor 540 detects that the temperature of the flue gas is lower than the set temperature, the temperature detecting sensor 540 transmits a signal to the motor 531, and the main shaft of the motor 531 rotates to drive the control rod 512 to rotate, so that the port a of the valve body 511 is communicated with the port C.

Referring to fig. 1 and 3, the hot-air duct 300 is communicated with an electric control valve 600, the electric control valve 600 is electrically connected with a temperature detection sensor 540, when the temperature detection sensor 540 detects that the temperature of the flue gas is lower than a set temperature, the temperature detection sensor 540 transmits a signal to the electric control valve 600, and the electric control valve 600 seals the hot-air duct 300, so that the possibility that the heat in the regenerator 720 is dissipated to the outside through the hot-air duct 300 is reduced.

Referring to fig. 1 and 2, heat exchange pipe 420 includes a first connection pipe 421, first connection pipe 421 is fixedly connected to an inner wall of heat exchange box 410, first connection pipe 421 is located near a top of heat exchange box 410, and first connection pipe 421 is communicated with smoke outlet pipe 100. The inner wall of the heat exchange box 410 is also fixedly connected with a second connecting pipe 422, the second connecting pipe 422 is positioned at a position close to the bottom of the heat exchange box 410, the second connecting pipe 422 is communicated with the smoke exhaust pipe 200, and the first connecting pipe 421 is parallel to the second connecting pipe 422. A plurality of heat exchange tubes 423 are communicated between the first connecting pipe 421 and the second connecting pipe 422, the plurality of heat exchange tubes 423 are arranged at equal intervals along the length direction of the first connecting pipe 421, and the heat exchange tubes 423 are serpentine coils. Through the plurality of heat exchange tubes 423 communicated between the first connecting tube 421 and the second connecting tube 422, the flue gas flowing into the first connecting tube 421 through the flue gas exhaust duct 200 flows into the second connecting tube 422 through the plurality of heat exchange tubes 423, and the flue gas exchanges heat with air in the process of flowing through the heat exchange tubes 423; by selecting the serpentine coil as the heat exchange tube 423, the moving path of the flue gas in the heat exchange box 410 is prolonged, so that the heat transfer between the flue gas and the air is more sufficient, and the heat exchange effect of the heat exchange mechanism 400 is improved.

The implementation principle of the flue gas waste heat recovery device for the soaking pit in the embodiment of the application is as follows: the combustion chamber 710 of the soaking pit 700 is communicated with the heat exchange pipeline 420 through the smoke outlet pipeline 100, smoke enters the heat exchange pipeline 420 in the heat exchange box 410 through the smoke outlet pipeline 100, the fan 430 sucks air outside the heat exchange box 410 into the heat exchange box 410, the air entering the heat exchange box 410 exchanges heat with the smoke in the heat exchange pipeline 420, the heated air enters the heat storage chamber 720 of the soaking pit 700 through the hot air pipeline 300 for use, the cooled smoke enters the chimney 800 through the smoke exhaust pipeline 200 and then is discharged to the external environment, therefore, the problem that a large amount of heat is taken away by the smoke exhausted from the soaking pit 700 is relieved, and the utilization rate of the heat in the soaking pit 700 is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a flue gas waste heat recovery device for soaking pit which characterized in that: including going out tobacco pipe (100), exhaust pipe (200), hot-blast pipeline (300) and being used for flue gas waste heat recovery's heat transfer mechanism (400), heat transfer mechanism (400) is including heat transfer case (410), heat transfer pipeline (420) and fan (430), fan (430) fixed connection in on heat transfer case (410), the air inlet and the external environment intercommunication of fan (430), the gas outlet of fan (430) with the inside intercommunication of heat transfer case (410), heat transfer pipeline (420) are located inside heat transfer case (410), it communicates with combustion chamber (710) of soaking pit (700) to go out tobacco pipe (100) one end, go out tobacco pipe (100) other end and heat transfer pipeline (420) intercommunication, exhaust pipe (200) one end with heat transfer pipeline (420) intercommunication, exhaust pipe (200) other end and chimney (800) intercommunication, one end of the hot air pipeline (300) is communicated with the heat exchange box (410), and the other end of the hot air pipeline (300) is communicated with a heat storage chamber (720) of the soaking pit furnace (700).

2. The flue gas waste heat recovery device for the soaking pit according to claim 1, characterized in that: be provided with reposition of redundant personnel mechanism (500) on smoke outlet pipe way (100), reposition of redundant personnel mechanism (500) are including three-way valve (510) and reposition of redundant personnel pipeline (520), three-way valve (510) intercommunication is in smoke outlet pipe says (100), reposition of redundant personnel pipeline (520) one end with three-way valve (510) intercommunication, reposition of redundant personnel pipeline (520) other end with discharge fume pipe (200) intercommunication, three-way valve (510) are right the flue gas in smoke outlet pipe way (100) is shunted.

3. The flue gas waste heat recovery device for the soaking pit according to claim 2, characterized in that: three-way valve (510) include valve body (511) and be used for control flue gas flow direction's in valve body (511) control lever (512), the A mouth and the B mouth of valve body (511) all with play tobacco pipe way (100) intercommunication, the C mouth of valve body (511) with play tobacco pipe way (100) intercommunication, control lever (512) with valve body (511) threaded connection, reposition of redundant personnel mechanism (500) still include control assembly (530) and temperature detection sensor (540), temperature detection sensor (540) are located in going out tobacco pipe way (100), temperature detection sensor (540) are located one side that three-way valve (510) are close to soaking pit (700), control assembly (530) with control lever (512) are connected, temperature detection sensor (540) with control assembly (530) electricity is connected.

4. The flue gas waste heat recovery device for the soaking pit according to claim 3, characterized in that: control assembly (530) includes motor (531) and two limiting plates (532), two limiting plate (532) parallel arrangement, two limiting plate (532) all with valve body (511) fixed connection, two limiting plate (532) are located respectively the both sides of control lever (512), the output shaft of motor (531) with the coaxial fixed connection of control lever (512), motor (531) are located two between limiting plate (532), the shell and two of motor (531) limiting plate (532) sliding connection, motor (531) with temperature detection sensor (540) electricity is connected.

5. The flue gas waste heat recovery device for the soaking pit according to claim 1, characterized in that: and a heat-insulating layer is arranged on the outer side of the smoke exhaust pipeline (200), and the heat-insulating layer is fixedly connected with the smoke exhaust pipeline (200).

6. The flue gas waste heat recovery device for the soaking pit according to claim 1, characterized in that: the heat exchange pipeline (420) comprises a first connecting pipe (421), a second connecting pipe (422) and a plurality of heat exchange pipes (423), the plurality of heat exchange pipes (423) are communicated between the first connecting pipe (421) and the second connecting pipe (422), the first connecting pipe (421) is communicated with the smoke outlet pipeline (100), the second connecting pipe (422) is communicated with the smoke exhaust pipeline (200), the first connecting pipe (421) is located at a position close to the top of the heat exchange box (410), the second connecting pipe (422) is located at a position close to the bottom of the heat exchange box (410), and the first connecting pipe (421) and the second connecting pipe (422) are fixedly connected with the heat exchange box (410).

7. The flue gas waste heat recovery device for the soaking pit according to claim 6, characterized in that: the heat exchange tubes (423) are coiled serpentine tubes.

8. The flue gas waste heat recovery device for the soaking pit according to claim 3, characterized in that: an electric control valve (600) is arranged on the hot air pipeline (300), and the electric control valve (600) is electrically connected with the temperature detection sensor (540).

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