CN-224230725-U - Tail gas heat energy recovery system of heating furnace

Abstract

The utility model relates to a tail gas heat energy recovery system of a heating furnace, which comprises a heat collection module, wherein the heat collection module comprises a tube seat, a sealing tube vertically fixed at the top of the tube seat, a tube cover transversely fixed at an opening at the end part of the sealing tube, and a heat transfer tube concentrically arranged in the sealing tube, an annular cylindrical convection cavity is formed between the outer wall of the heat transfer tube and the inner wall of the sealing tube, the heat collection module further comprises an air guide tube vertically arranged in the annular cylindrical convection cavity and positioned in front of the heat transfer tube, an air inlet tube transversely inserted in the front of the sealing tube, and an air outlet tube transversely inserted in the front of the sealing tube and communicated with the inner part of the annular cylindrical convection cavity and lower than the air inlet tube.

Inventors

• WANG YICUN
• LU JINQI
• WANG WEITING

Assignees

• 台州天巧自动化科技有限公司

Dates

Publication Date

20260512

Application Date

20250509

Claims (7)

1. 1. The tail gas heat energy recovery system of the heating furnace is characterized by comprising a heat collection module, wherein the heat collection module comprises a tube seat, a sealing tube vertically fixed at the top of the tube seat, a tube cover transversely fixed at an opening at the end part of the sealing tube and a heat transfer tube concentrically arranged in the sealing tube; The upper end opening of the heat transfer tube penetrates through the tube cover and extends out to the upper side of the tube cover, the lower end opening of the heat transfer tube is fixed at the top of the tube seat, and an annular cylindrical convection cavity is formed between the outer wall of the heat transfer tube and the inner wall of the sealing tube; The heat collection module further comprises an air guiding pipe vertically arranged in the annular cylindrical convection cavity and positioned in front of the heat transfer pipe, an air inlet pipe transversely inserted into the front side of the sealing pipe, and an air outlet pipe transversely inserted into the front side of the sealing pipe and communicated with the interior of the annular cylindrical convection cavity and lower than the air inlet pipe; The heat collection module further comprises an air duct which is inserted and fixed in the tube seat, and the upper end of the air duct passes through the top of the tube seat in a sealing way and is communicated with the inside of the opening at the lower end of the heat transfer tube.
2. 2. The tail gas heat energy recovery system of a heating furnace according to claim 1, wherein the upper end of the induced duct is open and close to the duct cover, and the lower end of the induced duct is closed.
3. 3. The tail gas heat energy recovery system of a heating furnace according to claim 2, wherein the rear end opening of the air inlet pipe is in sealing connection with the lower end of the air guiding pipe and is communicated with the inside of the air guiding pipe.
4. 4. The exhaust heat energy recovery system of a heating furnace according to claim 1, wherein the root opening of the air outlet pipe is close to the top of the tube seat.
5. 5. A tail gas heat energy recovery system of a heating furnace according to claim 3, further comprising a high temperature fan, wherein an air outlet of the high temperature fan is connected with a front end opening of the air inlet pipe.
6. 6. The tail gas heat energy recovery system of a heating furnace according to claim 1, wherein the heat collecting module further comprises a cylindrical heat shield concentrically sleeved outside the sealing tube, the lower end opening of the cylindrical heat shield is fixed at the top of the tube seat, and the air inlet tube and the air outlet tube are both arranged through the cylindrical heat shield.
7. 7. The tail gas heat energy recovery system of a heating furnace according to claim 1, wherein the heat transfer tube is a metal bellows.

Description

Tail gas heat energy recovery system of heating furnace Technical Field The application relates to the technical field of metal material heating equipment, in particular to a tail gas heat energy recovery system of a heating furnace. Background The continuous heating furnace is divided into a fuel heating furnace, a resistance heating furnace, an induction heating furnace, a microwave heating furnace and the like according to heat sources, but no matter which heat source is adopted, the metal can be heated, certain waste gas is formed, and the waste gas is mixed with hot gas in the hearth to form high-temperature tail gas, and finally the waste gas is discharged outwards. The fuel heating furnace has the advantages of quick heating and low unit price, so the production cost is relatively low, and the gas fuel is the first choice because the solid fuel has poor fluidity, large volume and inconvenient feeding, such as liquefied petroleum gas (commonly known as coal gas), natural gas and the like. The combustion of gas fuel in a heating gun in a heating furnace is necessary to have the participation of air, the existing fuel heating furnace directly introduces room temperature air into the heating gun, because the basic temperature of the room temperature air is lower (calculated according to average 20 degrees), in order to enable blanks to reach the target temperature, the heating time of the heating gun is required to be prolonged, the feeding speed of metal section materials is reduced, more fuel is consumed because the difference between the air inlet temperature and the fire outlet temperature is large, meanwhile, the production efficiency is also influenced, in addition, the heat carried by high-temperature tail gas generated from a hearth of the heating furnace is lost in a direct discharging process, the temperature of a smoke discharging pipe is high, the energy waste is serious, and operators can be scalded by the smoke discharging pipe due to carelessness, so that potential safety hazards exist and the production efficiency is required to be further improved. Disclosure of utility model Aiming at the current state of the prior art, the utility model aims to provide the tail gas heat recovery system of the heating furnace, which can absorb most of heat carried in high-temperature tail gas in the process of discharging and transfer the heat to room temperature air which is about to enter the furnace gun to participate in fuel combustion, so as to effectively reduce the heating time of the furnace gun and accelerate the feeding speed of blanks, thereby greatly reducing the fuel consumption to achieve the effects of energy conservation and environmental protection, effectively avoiding the waste of energy, effectively improving the production efficiency, and reducing the temperature of a smoke exhaust pipe for discharging the high-temperature tail gas to eliminate the potential safety hazard. The tail gas heat energy recovery system of the heating furnace is characterized by comprising a heat collection module, wherein the heat collection module comprises a tube seat, a sealing tube vertically fixed at the top of the tube seat, a tube cover transversely fixed at an opening at the end part of the sealing tube and a heat transfer tube concentrically arranged in the sealing tube; The upper end opening of the heat transfer tube penetrates through the tube cover and extends out to the upper side of the tube cover, the lower end opening of the heat transfer tube is fixed at the top of the tube seat, and an annular cylindrical convection cavity is formed between the outer wall of the heat transfer tube and the inner wall of the sealing tube; The heat collection module further comprises an air guiding pipe vertically arranged in the annular cylindrical convection cavity and positioned in front of the heat transfer pipe, an air inlet pipe transversely inserted into the front side of the sealing pipe, and an air outlet pipe transversely inserted into the front side of the sealing pipe and communicated with the interior of the annular cylindrical convection cavity and lower than the air inlet pipe; The heat collection module further comprises an air duct which is inserted and fixed in the tube seat, and the upper end of the air duct passes through the top of the tube seat in a sealing way and is communicated with the inside of the opening at the lower end of the heat transfer tube. Preferably, the upper end of the induced air pipe is opened and is close to the pipe cover, and the lower end of the induced air pipe is closed. Preferably, the rear end opening of the air inlet pipe is in sealing connection with the lower end of the air guiding pipe and is communicated with the inside of the air guiding pipe. Preferably, the root opening of the air outlet pipe is close to the top of the tube seat. Preferably, the air inlet pipe also comprises a high-temperature fan, and an air outlet of the high-temperature fan is con