CN113028846A

CN113028846A - Natural gas melts aluminium heating furnace flue gas waste heat recovery system

Info

Publication number: CN113028846A
Application number: CN202110450702.XA
Authority: CN
Inventors: 张秀芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-06-25

Abstract

The invention relates to the technical field of flue gas treatment, and discloses a natural gas aluminum melting heating furnace flue gas waste heat recovery system which comprises a fixing frame, wherein sliding grooves are formed in two sides of the upper part of the fixing frame, a fixing block is fixedly connected to one side of the bottom surface of the upper end of the fixing frame, and supporting rods are fixedly connected to two sides of the inner wall of the bottom of the fixing frame. Through the bellows inner wall, the bellows outer wall, the setting of backup pad, make the flue gas can heat the inside cold water of bellows, the vapor that the heating produced can make the bellows upwards extend, it begins to extract cold water from the inlet tube and replenishes to produce the negative pressure, when termination electric switch contacted the metal dog in the backup pad, open through-hole and drain pipe, the inside hot water of bellows at this moment begins to compress the bellows under self action of gravity, hot water is discharged from drain pipe and outlet pipe, realize the bellows from going up and down and the self-suction of cavity interior liquid, need not extra energy drive, the while is to the utilization of the heat energy maximize of flue gas, energy-concerving and environment-protective.

Description

Natural gas melts aluminium heating furnace flue gas waste heat recovery system

Technical Field

The invention relates to the technical field of flue gas treatment, in particular to a flue gas waste heat recovery system of a natural gas aluminum melting heating furnace.

Background

The natural gas aluminum melting heating furnace is an energy converter, which is a device for heating aluminum materials to a certain temperature and melting the aluminum materials into liquid by utilizing heat energy released by combustion of natural gas fuel. The reasons for influencing the combustion consumption of the heating furnace in the operation of the heating furnace are many, the heat loss of the exhaust smoke is an important factor, the higher the exhaust smoke temperature is, the larger the heat loss of the exhaust smoke is, a large number of factories directly discharge the exhaust smoke to the outside after environment-friendly treatment, the heat of the exhaust smoke cannot be effectively utilized, while a small number of factories usually arrange a heat exchanger at the exhaust end of a boiler to secondarily utilize the heat energy of the exhaust smoke, but the natural gas is used as cleaner energy, the heat of the exhaust smoke is not completely utilized and is discharged into the atmosphere, the heat of the exhaust smoke cannot be recovered, so that great resource waste is caused, the waste heat of the exhaust smoke is the main research direction for improving the heat efficiency of the heating furnace, and the heat loss of the exhaust smoke after the exhaust smoke is discharged from the combustion furnace is low because the natural gas is mainly carbon dioxide and water vapor which are used as cleaner energy sources, therefore, the recycling value of the natural gas combustion flue gas is higher, and the heat recovery is more, so that the design of the natural gas aluminum melting heating furnace flue gas waste heat recovery device is urgently needed.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides a natural gas aluminum melting heating furnace flue gas waste heat recovery system which has the advantages of full utilization of flue gas waste heat and less heat loss, and solves the problems provided by the background technology.

The invention provides the following technical scheme: a natural gas aluminum melting heating furnace flue gas waste heat recovery system comprises a fixing frame, wherein sliding grooves are formed in two sides of the upper portion of the fixing frame, a fixing block is fixedly connected to one side of the bottom surface of the upper end of the fixing frame, supporting rods are fixedly connected to two sides of the inner wall of the bottom of the fixing frame, an air inlet pipe is fixedly connected to the other end of each supporting rod, a corrugated pipe outer wall and a corrugated pipe inner wall are fixedly connected to the upper end of each air inlet pipe respectively, a connecting pipe is fixedly connected to the bottom of the inner wall of each corrugated pipe, a water inlet pipe penetrating through the air inlet pipe is fixedly connected to one side of each connecting pipe, a liquid conveying pipe is movably sleeved in the middle of the bottom end of each connecting pipe, a thread blade is fixedly connected to, the upper part of the inner wall of the air inlet pipe is fixedly connected with a collecting tank positioned above the liquid collecting tank, the upper end of the inner wall of the corrugated pipe is fixedly connected with a supporting plate movably sleeved with a sliding groove, the middle part of the supporting plate is provided with a through hole, one side of the middle part of the through hole is provided with a hydraulic cavity, one end of the hydraulic cavity is fixedly connected with a supporting spring, the other end of the supporting spring is fixedly connected with a metal stop block, the inside of the supporting plate is fixedly provided with an electromagnet at one side of the hydraulic cavity, one side of the middle part of the upper end of the supporting plate is provided with an electric switch positioned right below the fixed block, one side of the upper part of the inner wall of the corrugated pipe is fixedly connected with a water discharge pipe penetrating through the outer wall of the corrugated, the connecting rod is close to the one end fixedly connected with rubber dog of outlet pipe, the other end fixedly connected with piston of connecting rod, the upper portion fixedly connected with of drain pipe is with the communicating pipe of hydraulic pressure chamber with the drain pipe intercommunication.

Preferably, the other end of the water inlet pipe is connected with a cold water pipe, and the middle part of the water inlet pipe is provided with a check valve.

Preferably, the bottom end of the infusion tube is positioned at the bottom of the liquid collecting tank, a communicated water tube is arranged between the liquid collecting tank and the collecting tank, and the upper end of the infusion tube is provided with a pressure one-way valve.

Preferably, one side of the upper end of the outer wall of the corrugated pipe is provided with an exhaust pipe.

Preferably, the hydraulic chamber is filled with hydraulic oil.

The invention has the following beneficial effects:

1. through the arrangement of the inner wall of the corrugated pipe, the outer wall of the corrugated pipe and the supporting plate, smoke can heat cold water in the corrugated pipe, steam can be generated after the cold water is heated to be boiled, a large amount of steam can enable the corrugated pipe to extend upwards, negative pressure is generated, cold water is extracted from the water inlet pipe to be supplemented, when the upper end of the supporting plate is connected with the electric switch to be in contact with the metal stop block, the through hole and the drain pipe are opened, hot water in the corrugated pipe begins to compress the corrugated pipe under the action of self gravity, the hot water is discharged from the drain pipe and the water outlet pipe, when the corrugated pipe is contracted to be minimum, the electromagnet is powered off, the metal stop block and the rubber stop block sequentially block the through hole and the drain pipe, when natural gas and waste gas are continuously introduced between the inner wall of the corrugated pipe and the outer wall of the corrugated pipe, the device does not need additional energy drive, simultaneously utilizes the heat energy of the flue gas to the maximum, and is energy-saving and environment-friendly.

2. Through the transfer line, the setting of collecting tank, make when the natural gas flue gas enters into the intake pipe, can blow the impeller rotation, can stir the inside water of bellows, it is even to guarantee the water to be heated, and can accelerate the evaporation of liquid, the flexible speed of bellows with higher speed, the efficiency is improved, meanwhile, bellows inner wall and bellows outer wall surface can condense a large amount of liquid drops, these liquid drops will flow in collecting vat and collecting tank, and finally assemble in the collecting tank, after the inside hot water of bellows discharges, rotatory transfer line can pour these comdenstion waters into inside the bellows through the screw thread leaf this moment, avoid causing the waste of water resource, and when the inside water level of bellows rises, the pressure check valve of transfer line upper end self-closing under its water pressure, can not cause the inside liquid of bellows to flow from the transfer line.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is an enlarged view of the structure A of the present invention;

fig. 4 is an enlarged view of the structure B of the present invention.

In the figure: 1. a fixed mount; 2. a chute; 3. a fixed block; 4. a support bar; 5. an air inlet pipe; 6. an outer wall of the bellows; 7. the inner wall of the corrugated pipe; 8. a connecting pipe; 9. a water inlet pipe; 10. a transfusion tube; 11. a thread leaf; 12. a rotating shaft; 13. an impeller; 14. a liquid collecting tank; 15. collecting tank; 16. a support plate; 17. a through hole; 18. a hydraulic chamber; 19. a support spring; 20. a metal stopper; 21. an electromagnet; 22. connecting a power switch; 23. a drain pipe; 24. a water outlet pipe; 25. a fixed block; 26. a connecting rod; 27. a rubber stopper; 28. a piston; 29. a communication pipe is provided.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a flue gas waste heat recovery system of a natural gas aluminum melting heating furnace comprises a fixing frame 1, sliding grooves 2 are respectively arranged at two sides of the upper part of the fixing frame 1, a fixing block 3 is fixedly connected to one side of the bottom surface of the upper end of the fixing frame 1, a support rod 4 is fixedly connected to two sides of the bottom inner wall of the fixing frame 1, an air inlet pipe 5 is fixedly connected to the other end of the support rod 4, a corrugated pipe outer wall 6 and a corrugated pipe inner wall 7 are respectively fixedly connected to the upper end of the air inlet pipe 5, a connecting pipe 8 is fixedly connected to the bottom of the corrugated pipe inner wall 7, a water inlet pipe 9 penetrating through the air inlet pipe 5 is fixedly connected to one side of the connecting pipe 8, a transfusion pipe 10 is movably sleeved in the middle of the bottom end of the connecting pipe 8, a, the upper part of the inner wall of the air inlet pipe 5 is fixedly connected with a collecting tank 15 positioned above a liquid collecting tank 14, the upper end of the inner wall 7 of the corrugated pipe is fixedly connected with a supporting plate 16 movably sleeved with a sliding groove 2, the middle part of the supporting plate 16 is provided with a through hole 17, one side of the middle part of the through hole 17 is provided with a hydraulic cavity 18, one end of the hydraulic cavity 18 is fixedly connected with a supporting spring 19, the other end of the supporting spring 19 is fixedly connected with a metal stop 20, the inside of the supporting plate 16 is fixedly provided with an electromagnet 21 at one side of the hydraulic cavity 18, one side of the middle part of the upper end of the supporting plate 16 is provided with an electric switch 22 positioned right below the fixed block 3, one side of the upper part of the inner wall 7 of the corrugated pipe is fixedly connected with a drain pipe, one end of the connecting rod 26 close to the water outlet pipe 24 is fixedly connected with a rubber stopper 27, the other end of the connecting rod 26 is fixedly connected with a piston 28, and the upper part of the water outlet pipe 23 is fixedly connected with a communicating pipe 29 for communicating the hydraulic cavity 18 with the water outlet pipe 23.

Wherein, the other end of the inlet tube 9 is connected with a cold water pipe, and the middle part of the inlet tube 9 is provided with a check valve, when the flue gas waste heat recovery device works, cold water is firstly injected into the connecting tube 8 through the inlet tube 9 until the cold water is full of the inner cavity of the corrugated tube, then natural gas flue gas waste gas is introduced from the bottom air inlet tube 5, so that the flue gas fills the cavity between the outer wall 6 of the corrugated tube and the inner wall 7 of the corrugated tube, the cold water in the corrugated tube can be heated by the flue gas, when the cold water is heated to boiling, steam can be generated, a large amount of steam causes the internal air pressure to be increased, the corrugated tube can extend upwards, the space in the corrugated tube is increased, the cold water is extracted from the inlet tube 9 to supplement by generating negative pressure until the corrugated tube extends, magnetic force is generated to attract the metal stop block 20 to move towards one side of the metal stop block, the through hole is opened, the interior of the corrugated pipe is communicated with the external atmospheric pressure, hydraulic oil in a hydraulic cavity is extruded when the metal stop block 20 moves, the rubber stop block 27 moves towards the outer side, a channel between the water discharging pipe 23 and the water discharging pipe 24 is opened at the same time, hot water in the corrugated pipe begins to compress the corrugated pipe under the action of self gravity, the hot water is discharged from the water discharging pipe 23 and the water discharging pipe 24 and flows to a place where the hot water needs to be used, when the corrugated pipe is contracted to the minimum, the electromagnet 21 is powered off, the metal stop block 20 and the rubber stop block 27 sequentially block the through hole 17 and the water discharging pipe 23, when natural gas and waste gas are continuously introduced between the inner wall 7 of the corrugated pipe and the outer wall 6 of the corrugated pipe, the actions can, the device does not need additional energy drive, simultaneously utilizes the heat energy of the flue gas to the maximum, and is energy-saving and environment-friendly.

Wherein, the bottom of the infusion tube 10 is located at the bottom of the liquid collecting tank 14, a water tube communicated with the liquid collecting tank 14 and the collecting tank 15 is arranged between the liquid collecting tank 14 and the collecting tank 15, the upper end of the infusion tube 10 is provided with a pressure one-way valve, when natural gas smoke enters the air inlet tube 5, the impeller 13 can be blown to rotate, the water inside the corrugated tube can be stirred, the water can be uniformly heated, the evaporation of liquid can be accelerated, the expansion speed of the corrugated tube is accelerated, the efficiency is improved, meanwhile, when water vapor in waste gas after the natural gas is combusted heats cold water, a large amount of liquid drops can be condensed on the surfaces of the inner wall 7 and the outer wall 6 of the corrugated tube, the liquid drops can flow into the collecting tank 15 and the liquid collecting tank 14 and finally converge in the liquid collecting tank 14, after the hot water inside the corrugated tube is discharged, the waste of water resources is avoided, and when the water level in the corrugated pipe rises, the pressure one-way valve at the upper end of the infusion pipe 10 is automatically closed under the action of the water pressure, so that the liquid in the corrugated pipe cannot flow out of the infusion pipe 10.

Wherein, the blast pipe has been seted up to one side of bellows outer wall 6 upper end, avoids the inside gas pressure of cavity that forms between bellows outer wall 6 and the bellows inner wall 7 too big, and can't realize the heating to the water, damages the bellows even. .

Wherein, hydraulic oil is filled in the hydraulic cavity 18, which can realize the simultaneous opening and closing of the through hole 17 and the drain pipe 23.

The working principle is that when the flue gas waste heat recovery device works, cold water is firstly injected into a connecting pipe 8 through a water inlet pipe 9 until the cold water is full of an inner cavity of a corrugated pipe, then natural gas flue gas is introduced from a bottom air inlet pipe 5, the flue gas is filled in a cavity between an outer wall 6 of the corrugated pipe and an inner wall 7 of the corrugated pipe, the cold water in the corrugated pipe can be heated by the flue gas, water vapor can be generated after the cold water is heated to be boiled, the internal air pressure of the corrugated pipe is increased due to a large amount of water vapor, the corrugated pipe can be extended upwards, the space in the corrugated pipe is increased, negative pressure is generated, the cold water is extracted from the water inlet pipe 9 for supplement until the corrugated pipe is extended to the maximum value, an electric switch 22 connected to the metal stopper 20 on the upper end of a supporting plate 16 at the moment, an electromagnet, because the hydraulic oil in the hydraulic cavity is squeezed when the metal stop block 20 moves, the rubber stop block 27 moves outwards, a channel between the drain pipe 23 and the water outlet pipe 24 is opened, at the moment, hot water in the corrugated pipe starts to compress the corrugated pipe under the action of self gravity, the hot water is discharged from the drain pipe 23 and the water outlet pipe 24 and flows to a place where the hot water is needed to be used, when the corrugated pipe is contracted to the minimum, the electromagnet 21 is powered off, at the moment, the through hole 17 and the drain pipe 23 are sequentially blocked by the metal stop block 20 and the rubber stop block 27, when natural gas and waste gas are continuously introduced between the inner wall 7 of the corrugated pipe and the outer wall 6 of the corrugated pipe, the actions can be carried out again, a cycle is realized, the self-lifting of the corrugated pipe and the self-suction of liquid in the cavity are realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a natural gas melts aluminium heating furnace flue gas waste heat recovery system, includes mount (1), spout (2), its characterized in that have all been seted up to both sides on mount (1) upper portion: one side of the bottom surface of the upper end of the fixing frame (1) is fixedly connected with a fixing block (3), two sides of the inner wall of the bottom of the fixing frame (1) are fixedly connected with supporting rods (4), the other end of each supporting rod (4) is fixedly connected with an air inlet pipe (5), the upper end of each air inlet pipe (5) is respectively and fixedly connected with a corrugated pipe outer wall (6) and a corrugated pipe inner wall (7), the bottom of each corrugated pipe inner wall (7) is fixedly connected with a connecting pipe (8), one side of each connecting pipe (8) is fixedly connected with an air inlet pipe (9) penetrating through the air inlet pipe (5), the upper end of each corrugated pipe inner wall (7) is fixedly connected with a supporting plate (16) movably sleeved with a sliding groove (2), a through hole (17) is formed in the middle of each supporting plate (16), a hydraulic cavity (18) is formed in one, the other end of the supporting spring (19) is fixedly connected with a metal stop block (20), an electromagnet (21) on one side of a hydraulic cavity (18) is fixedly installed inside the supporting plate (16), a power connection switch (22) which is positioned under the fixed block (3) is arranged on one side of the middle part of the upper end of the supporting plate (16), a drain pipe (23) which penetrates through the outer wall (6) of the corrugated pipe is fixedly connected to one side of the upper part of the inner wall (7) of the corrugated pipe, a water outlet pipe (24) is fixedly connected to the middle part of the drain pipe (23), a fixed block (25) is fixedly connected to one side of the middle part of the inner cavity of the drain pipe (23), a connecting rod (26) is movably sleeved at the middle part of the fixed block (25), a rubber stop block (27) is fixedly connected to one end, the upper part of the drain pipe (23) is fixedly connected with a communicating pipe (29) which communicates the hydraulic cavity (18) with the drain pipe (23).

2. The natural gas aluminum melting heating furnace flue gas waste heat recovery system of claim 1, characterized in that: transfer line (10) have been cup jointed in the middle part activity of connecting pipe (8) bottom, the inside fixedly connected with screw thread leaf (11) of transfer line (10), the middle part fixedly connected with pivot (12) of screw thread leaf (11), the bottom fixedly connected with impeller (13) of pivot (12), the bottom fixedly connected with collecting tank (14) of connecting pipe (8), the upper portion fixedly connected with of intake pipe (5) inner wall is located collecting vat (15) of collecting tank (14) top, the bottom of transfer line (10) is located the bottom of collecting vat (14), be provided with the water pipe of intercommunication between collecting vat (14) and collecting vat (15), the upper end of transfer line (10) is provided with the pressure check valve.

3. The natural gas aluminum melting heating furnace flue gas waste heat recovery system of claim 1, characterized in that: the other end of the water inlet pipe (9) is connected with a cold water pipe, and the middle part of the water inlet pipe (9) is provided with a check valve.

4. The natural gas aluminum melting heating furnace flue gas waste heat recovery system of claim 1, characterized in that: an exhaust pipe is arranged on one side of the upper end of the corrugated pipe outer wall (6).

5. The natural gas aluminum melting heating furnace flue gas waste heat recovery system of claim 1, characterized in that: the hydraulic cavity (18) is filled with hydraulic oil.