CN213012997U

CN213012997U - Cold rolling annealing furnace with waste heat recovery effect

Info

Publication number: CN213012997U
Application number: CN202021718303.4U
Authority: CN
Inventors: 裴亚东; 吴雅培; 朱法务
Original assignee: Jiangsu Yuecheng Metal Technology Co ltd
Current assignee: Jiangsu Yuecheng Metal Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-04-20
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a cold rolling annealing stove with waste heat recovery effect, including cold rolling annealing stove main part, filter screen, inlet tube, outlet pipe, second outlet duct, heat exchange tube and second intake pipe, the water tank is installed on the right side of cold rolling annealing stove main part, the water tank top is connected with first intake pipe, the left side of water tank is connected with the check valve, the end-to-end connection of check valve has the heat preservation cover, the second outlet duct is connected with the heat exchange tube, the heat exchange tube is connected with the second intake pipe, and the second intake pipe is connected with cold rolling annealing stove main part, the second intake pipe is located first intake pipe. This cold rolling annealing stove with waste heat recovery effect is provided with the pipe of discharging fume, and the pipe end of discharging fume installs the fan, can collect the exhaust fume fast, and the union coupling of discharging fume has first intake pipe, and first intake pipe connection has the water tank, heats water with the heat that the exhaust fume of collecting contains to continuously give the heating of cold rolling annealing stove main part, effectively utilize residual heat through hydrologic cycle.

Description

Cold rolling annealing furnace with waste heat recovery effect

Technical Field

The utility model relates to a cold rolling annealing furnace waste heat recovery technical field specifically is a cold rolling annealing furnace with waste heat recovery effect.

Background

Annealing is a heat treatment process of metals in which a metal is slowly heated to a certain temperature for a sufficient time and then cooled at a suitable speed in order to soften a material or a workpiece by casting, forging, welding or cutting, improve plasticity and toughness, homogenize chemical components, remove residual stress, or obtain desired physical properties, and an annealing furnace is a container for completing the heat treatment process of metals.

The flue gas (tail gas) of the annealing furnace used in the market at present is directly discharged out of a factory building after being extracted by a fan, and cannot be recycled, and the flue gas of the annealing furnace is actually high-temperature flue gas with the temperature of more than 500 ℃, carries a large amount of heat energy, and is directly discharged, so that the waste of the heat energy is serious, and the method is not in line with the energy-saving and environment-friendly production concept of modern industry, and therefore a cold-rolling annealing furnace with the waste heat recycling effect is provided, and the problems provided in the method are solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cold rolling annealing stove with waste heat recovery effect to solve the annealing stove flue gas (tail gas) that uses on the existing market that above-mentioned background art provided and directly discharge the factory building after the fan is taken out, fail through any recovery processing, and the flue gas of annealing stove is the high temperature flue gas that the temperature is up to more than 500 ℃ in fact, carries a large amount of heat energy, direct exhaust processing method, makes the serious problem of waste of heat energy.

In order to achieve the above object, the utility model provides a following technical scheme: a cold rolling annealing furnace with a waste heat recovery effect comprises a cold rolling annealing furnace main body, a water inlet pipe, a water outlet pipe, a second air outlet pipe, a heat exchange pipe and a second air inlet pipe, wherein a water tank is installed on the right side of the cold rolling annealing furnace main body, an air tank is fixed on the right side of the water tank, a first air inlet pipe is connected above the water tank, a fan is installed at the joint of the first air inlet pipe and the water tank, the tail end of the first air inlet pipe is connected with a smoke exhaust pipe, the smoke exhaust pipe is connected with the cold rolling annealing furnace main body, the left side of the water tank is connected with a one-way valve, the tail end of the one-way valve is connected with a heat preservation cover, a vent is arranged above the heat preservation cover, a filter screen is installed in the vent, the left side of the water, the second air outlet pipe is connected with a heat exchange pipe, the heat exchange pipe is connected with a second air inlet pipe, the second air inlet pipe is connected with the cold rolling annealing furnace main body, and the second air inlet pipe is located in the smoke exhaust pipe.

Preferably, the diameter of the smoke exhaust pipe is smaller than that of the heat exchange pipe, and the first air inlet pipe is sleeved inside the heat exchange pipe.

Preferably, a hollow structure is arranged between the heat-insulating cover and the main body of the cold-rolling annealing furnace, and asbestos is selected as an internal filling material.

Preferably, the water inlet pipe and the water outlet pipe form a circular pipeline shaped like a Chinese character 'hui', the water inlet pipe and the water outlet pipe are both in a fan shape, and the water inlet pipe and the water outlet pipe are uniformly distributed on the main body of the cold rolling annealing furnace.

Preferably, the check valve is used between the water tank and the heat preservation cover, and the gas in the water tank flows into the heat preservation cover through the check valve.

Preferably, the gas output from the gas box is protective gas nitrogen, and the material of the filter screen is activated carbon.

Compared with the prior art, the beneficial effects of the utility model are that: this cold rolling annealing stove with waste heat recovery effect:

(1) the cold-rolling annealing furnace is provided with a smoke exhaust pipe, a fan is mounted at the tail end of the smoke exhaust pipe, waste smoke can be rapidly collected, the smoke exhaust pipe is connected with a first air inlet pipe, the first air inlet pipe is connected with a water tank, water is heated by heat contained in the collected waste smoke, the cold-rolling annealing furnace body is continuously heated through water circulation, and residual heat is effectively utilized;

(2) be provided with the heat preservation cover, make from the water tank combustion gas can not disappear fast after getting into the heat preservation cover its heat that contains, and the vent has been seted up to the heat preservation cover, and the filter screen is installed to the vent, and the pollution to the environment is reduced through filtering before the exhaust gas discharges.

Drawings

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

FIG. 2 is a schematic sectional view of the heat exchange tube of the present invention;

fig. 3 is the schematic view of the structure of the heat preservation cover of the utility model.

In the figure: 1. a cold rolling annealing furnace main body; 2. a water tank; 3. a gas tank; 4. a first intake pipe; 5. a fan; 6. a smoke exhaust pipe; 7. a one-way valve; 8. a heat-preserving cover; 9. a vent; 10. a filter screen; 11. a water inlet pipe; 12. a water outlet pipe; 13. a second air outlet pipe; 14. a heat exchange pipe; 15. a second intake pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described in 12 are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a cold rolling annealing furnace with a waste heat recovery effect comprises a cold rolling annealing furnace main body 1, a water tank 2, an air tank 3, a first air inlet pipe 4, a fan 5, a smoke exhaust pipe 6, a check valve 7, a heat preservation cover 8, a vent 9, a filter screen 10, a water inlet pipe 11, a water outlet pipe 12, a second air outlet pipe 13, a heat exchange pipe 14 and a second air inlet pipe 15, wherein the water tank 2 is installed on the right side of the cold rolling annealing furnace main body 1, the air tank 3 is fixed on the right side of the water tank 2, the first air inlet pipe 4 is connected above the water tank 2, the fan 5 is installed at the joint of the first air inlet pipe 4 and the water tank 2, the tail end of the first air inlet pipe 4 is connected with the smoke exhaust pipe 6, the smoke exhaust pipe 6 is connected with the cold rolling annealing furnace main body 1, the left side of the water tank 2 is connected, the left side of water tank 2 is connected with inlet tube 11, and inlet tube 11 is in the top of check valve 7, and the right side of water tank 2 is connected with

outlet pipe

12, and 3 tops of gas tank are connected with second outlet duct 13, and second outlet duct 13 is connected with heat exchange tube 14, and heat exchange tube 14 is connected with second intake pipe 15, and second intake pipe 15 is connected with cold rolling annealing stove main part 1, and second intake pipe 15 is located the pipe 6 of discharging fume.

The diameter of the smoke exhaust pipe 6 is smaller than that of the heat exchange pipe 14, the smoke exhaust pipe 6 is sleeved inside the heat exchange pipe 14, the heat exchange time of the smoke exhaust pipe 6 and the heat exchange pipe 14 is prolonged, and high-temperature waste gas in the smoke exhaust pipe 6 can heat nitrogen in the heat exchange pipe 14 more quickly.

The heat-insulating cover 8 and the cold-rolling annealing furnace main body 1 are of a hollow structure, and asbestos is selected as an internal filling material, so that the heat dissipation speed of high-temperature gas flowing into the heat-insulating cover 8 from the water tank 2 is reduced.

The water inlet pipe 11 and the water outlet pipe 12 form a circular pipeline in a shape of a Chinese character 'hui', the water inlet pipe 11 and the water outlet pipe 12 are both in a fan shape, and the water inlet pipe 11 and the water outlet pipe 12 are uniformly distributed on the cold-rolling annealing furnace main body 1, so that workpieces annealing in the cold-rolling annealing furnace main body 1 are uniformly heated.

The check valve 7 is used between the water tank 2 and the heat preservation cover 8, the air in the water tank 2 flows into the heat preservation cover 8 through the check valve 7, and when the air pressure in the water tank 2 is too high, the air in the water tank 2 flows into the heat preservation cover 8 through the check valve 7 and is discharged through the vent 9.

Protective gas nitrogen is selected for use to the gas of export in the gas tank 3, and activated carbon is selected for use to the material of filter screen 10, and the nitrogen gas of input is selected for use because nitrogen gas does not react with oxygen under the high temperature condition, and oxygen can be extruded to nitrogen gas, and the material of filter screen 10 is selected for use activated carbon and is filtered the harmful substance in the waste gas, reduces the destruction to the environment.

The working principle is as follows: when the cold rolling annealing furnace with the waste heat recovery effect is used, firstly, waste gas generated by the cold rolling annealing furnace main body 1 during working flows into the water tank 2 through the smoke exhaust pipe 6 under the action of the fan 5, a large amount of heat energy is contained in the waste gas, the heat energy heats water in the water tank 2, and the water circulates around the cold rolling annealing furnace main body 1 along the water outlet pipe 12 and returns to the water tank 2 from the water inlet pipe 11 to be heated again.

The nitrogen in the gas box 3 flows to the heat exchange tube 14 along the second air outlet tube 13, because the smoke exhaust tube 6 is arranged inside the heat exchange tube 14, the nitrogen and the waste gas in the smoke exhaust tube 6 generate heat exchange, and the hot nitrogen flows into the cold-rolling annealing furnace main body 1 through the second air inlet tube 15, so that the auxiliary heating can be realized, and the oxygen in the air can be discharged.

Because the water tank 2 is continuously filled with gas, the pressure in the water tank 2 is gradually increased, when certain strength is reached, the gas pushes the check valve 7 open and flows into the heat-insulating cover 8, asbestos materials filled in the heat-insulating cover 8 effectively absorb heat, the heat-insulating cover 8 is provided with the vent 9, the filter screen 10 is arranged in the vent 9, the gas is filtered by the filter screen 10 before flowing out and then is discharged into the air, the damage to the environment is greatly reduced, the working principle of the device is the above, and the contents which are not described in detail in the specification, such as the water tank 2, the gas tank 3, the first air inlet pipe 4 and the like, belong to the prior art known by professional technicians in the field.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a cold rolling annealing stove with waste heat recovery effect, includes cold rolling annealing stove main part (1), inlet tube (11), outlet pipe (12), second outlet duct (13), heat exchange tube (14) and second intake pipe (15), its characterized in that: the cold rolling annealing furnace is characterized in that a water tank (2) is installed on the right side of a cold rolling annealing furnace main body (1), a gas tank (3) is fixed on the right side of the water tank (2), a first air inlet pipe (4) is connected to the upper portion of the water tank (2), a fan (5) is installed at the joint of the first air inlet pipe (4) and the water tank (2), a smoke exhaust pipe (6) is connected to the tail end of the first air inlet pipe (4), the smoke exhaust pipe (6) is connected to the cold rolling annealing furnace main body (1), a check valve (7) is connected to the left side of the water tank (2), a heat insulation cover (8) is connected to the tail end of the check valve (7), a vent (9) is formed in the upper portion of the heat insulation cover (8), a filter screen (10) is installed in the vent (9), a water inlet pipe (11) is connected to the left side of the water tank (, the cold rolling annealing furnace is characterized in that a second air outlet pipe (13) is connected above the air box (3), the second air outlet pipe (13) is connected with a heat exchange pipe (14), the heat exchange pipe (14) is connected with a second air inlet pipe (15), the second air inlet pipe (15) is connected with the cold rolling annealing furnace main body (1), and the second air inlet pipe (15) is located in the smoke exhaust pipe (6).

2. The cold rolling annealing furnace with waste heat recovery effect according to claim 1, wherein: the diameter of the smoke exhaust pipe (6) is smaller than that of the heat exchange pipe (14), and the smoke exhaust pipe (6) is sleeved inside the heat exchange pipe (14).

3. The cold rolling annealing furnace with waste heat recovery effect according to claim 1, wherein: and a hollow structure is arranged between the heat-insulating cover (8) and the cold-rolling annealing furnace main body (1), and asbestos is selected as an internal filling material.

4. The cold rolling annealing furnace with waste heat recovery effect according to claim 1, wherein: the cold-rolling annealing furnace is characterized in that the water inlet pipe (11) and the water outlet pipe (12) form a circular pipeline in a shape of a Chinese character 'hui', the water inlet pipe (11) and the water outlet pipe (12) are both fan-shaped, and the water inlet pipe (11) and the water outlet pipe (12) are uniformly distributed on the cold-rolling annealing furnace main body (1).

5. The cold rolling annealing furnace with waste heat recovery effect according to claim 1, wherein: the check valve (7) is used between the water tank (2) and the heat preservation cover (8), and gas in the water tank (2) flows into the heat preservation cover (8) through the check valve (7).

6. The cold rolling annealing furnace with waste heat recovery effect according to claim 1, wherein: the gas output from the gas box (3) is protective gas nitrogen, and the material of the filter screen (10) is activated carbon.