CN210533020U

CN210533020U - Energy-saving gas crucible furnace

Info

Publication number: CN210533020U
Application number: CN201921542282.2U
Authority: CN
Inventors: 吴应勇
Original assignee: Ningbo Dongcheng Qunli Machinery Co ltd
Current assignee: Ningbo Dongcheng Qunli Machinery Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-15
Anticipated expiration: 2029-09-17

Abstract

The utility model relates to the technical field of metal melting equipment, in particular to an energy-saving gas crucible furnace, which comprises a furnace body, a fuel storage chamber, a combustion-supporting air conveying device and a flue gas treatment device, wherein a crucible is arranged in a hearth of the furnace body, and a combustion chamber for fuel combustion is formed between the crucible and the hearth; a feeding pipe is connected between the fuel storage chamber and the combustion chamber; the combustion air conveying device comprises a blower and an air supply pipe; the flue gas treatment device comprises a heat accumulation chamber, a heat exchanger is arranged in the heat accumulation chamber, an air supply pipe is communicated with the heat exchanger in the heat accumulation chamber, an air supply pipe, a smoke guide pipe and a smoke exhaust pipe are arranged on the heat accumulation chamber, and the air supply pipe and the smoke guide pipe are communicated with the combustion chamber respectively. After the high-temperature flue gas generated in the combustion process exchanges heat with air serving as a combustion improver in the heat exchanger, the temperature of the air is increased, and the air is conveyed into the combustion chamber to play a sufficient combustion-supporting role, so that the heat efficiency in the combustion chamber is greatly improved, and the energy consumption is reduced.

Description

Energy-saving gas crucible furnace

Technical Field

The utility model relates to a metal melting equipment technical field especially relates to an energy-conserving gas crucible furnace.

Background

The crucible furnace is a device for melting metal commonly used in metallurgical industry, is a furnace for melting or insulating metals such as aluminum, copper, lead and the like, and generally comprises a furnace body, a burner, a hearth, a crucible placed in the hearth, and a chimney for discharging waste gas after combustion to the atmosphere. When the furnace is in work, the combustion nozzle provides a heat source for the hearth to heat the crucible, and high-temperature flue gas generated during heating is discharged into the atmosphere from the chimney.

Crucible furnaces sold in the market and used in factories generally adopt a coke, diesel oil or a gas burner as an energy source, but in the crucible furnaces in the prior art, not only is harmful gas content in smoke generated when a crucible is heated, but also a large amount of high-temperature waste gas is discharged into the atmosphere in an unused state, the energy consumption is high, the environment burden is increased by the discharged high-temperature waste gas, the environment protection is not facilitated, and the energy-saving, environment-friendly and energy-saving society is not facilitated to be built.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving gas crucible furnace to realize the purpose of energy saving.

In order to achieve the above purpose, the basic scheme of the utility model is as follows: an energy-saving gas crucible furnace comprises a furnace body, a fuel storage chamber, a combustion air conveying device and a flue gas treatment device, wherein a crucible is arranged in a hearth of the furnace body, a combustion chamber for fuel combustion is formed between the crucible and the hearth, and an igniter is arranged in the combustion chamber; a feeding pipe is connected between the fuel storage chamber and the combustion chamber, and a feeding valve is installed on the feeding pipe; the combustion air conveying device comprises a blower and an air supply pipe; the flue gas processing device comprises a heat storage chamber, a heat exchanger is arranged in the heat storage chamber, the air supply pipe is communicated with the heat exchanger in the heat storage chamber, an air supply pipe, a smoke guide pipe and a smoke exhaust pipe are arranged on the heat storage chamber, the air supply pipe and the smoke guide pipe are communicated with the combustion chamber respectively, the air supply pipe is located below the smoke guide pipe, a first one-way valve used for enabling air to flow into the combustion chamber is arranged on the air supply pipe, and a second one-way valve used for enabling flue gas to flow into the heat exchanger is arranged on the smoke guide pipe.

Furthermore, the bottom of the combustion chamber is provided with an ash collecting groove, and an air supply channel and an ash removal channel which are communicated with the ash collecting groove are arranged in the furnace body.

By adopting the technical scheme, the ash collecting groove at the bottom of the combustion chamber can collect the furnace ash generated in the combustion process of the fuel.

Furthermore, the air supply pipe is provided with an air supply pipe communicated with the air supply pipe, the air supply pipe is communicated with the air supply channel, and the air supply pipe is provided with an air supply valve.

By adopting the technical scheme, the air supply pipe can bring air into the air supply channel communicated with the ash collection groove, and then the furnace ash in the ash collection groove is discharged out of the furnace body through the ash removal channel.

Furthermore, the ash removal channel extends to the outer wall of the furnace body, and a sealing cover for sealing the ash removal channel is arranged on the outer wall of the furnace body.

By adopting the technical scheme, air is sent into the air supply channel through the air supply pipe and the air supply pipe in sequence by utilizing the air blower, high-speed airflow is formed in the air supply channel by the air, and the furnace dust in the dust collection groove is blown into the dust cleaning channel, so that the furnace dust is removed from the furnace body through the dust cleaning channel.

Furthermore, a refractory brick layer is lined on the inner wall of the hearth, and the combustion chamber is formed by enclosing the refractory brick layer.

Through adopting above-mentioned technical scheme, the firebrick layer plays the high temperature in the combustion chamber and the mutual isolated effect of furnace body outer wall, makes the heat that the fuel burning produced all concentrate and supply to the crucible.

Further, the hearth is coated with a heat insulation layer, and the heat insulation layer consists of rock wool boards, steel wire mesh sandwich boards and polystyrene boards.

Through adopting above-mentioned technical scheme, the heat preservation can keep warm to the temperature in the furnace, reduces thermal loss to the energy has been saved.

Further, the igniter is a pulse igniter.

Through adopting above-mentioned technical scheme, pulsed point firearm can be used to the direct firing of gaseous fuel, liquid fuel combustor or torch, through setting up ignition time by oneself, realizes combustion system's stable ignition, convenient and fast, labour saving and time saving, the reliability is high.

Compared with the prior art, the scheme has the beneficial effects that: a large amount of high-temperature flue gas generated in the process of burning fuel in the combustion chamber is guided into the heat storage chamber through the smoke guide pipe to exchange heat with air serving as a combustion improver, so that waste heat in the flue gas is fully utilized, the temperature of the air serving as the combustion improver is increased under the action of the heat exchanger, and the air is conveyed into the combustion chamber to fully support combustion of the burning fuel, so that the heat efficiency in the combustion chamber is greatly improved, and the consumption of energy is reduced.

Drawings

FIG. 1 is a schematic structural view of an energy-saving gas crucible furnace of the present invention;

fig. 2 is a schematic view of the sectional structure of the energy-saving gas crucible furnace of the present invention.

Reference numerals in the drawings of the specification include: the furnace comprises a furnace body 1, a heat preservation layer 11, a fuel storage chamber 2, a feeding pipe 21, a feeding valve 22, a heat storage chamber 3, a heat exchanger 31, a crucible 4, a crucible cover 41, a combustion chamber 5, an igniter 51, an ash collecting groove 6, an air supply channel 61, an ash cleaning channel 62, a sealing cover 63, a blower 7, an air supply pipe 71, an air supply pipe 72, a first one-way valve 73, a smoke guide pipe 8, a second one-way valve 81, an exhaust pipe 82, an air supply pipe 9 and an air supply valve 91.

Detailed Description

The invention will be described in further detail by means of specific embodiments with reference to the accompanying drawings:

example (b):

the utility model provides an energy-conserving gas crucible furnace, as shown in fig. 1 and 2, including furnace body 1, fuel storage room 2, combustion air conveyor and flue gas processing apparatus, the outer wall of furnace body 1 is equipped with metal casing, is equipped with uncovered formula furnace in the furnace body 1, and the inside lining has the firebrick layer on the inner wall of furnace, is equipped with the heat preservation 11 that different insulation material of multilayer is constituteed between furnace's outer wall and the metal casing, and heat preservation 11 is rock wool board, wire net battenboard and polyphenyl board from inside to outside in proper order. An open crucible 4 is arranged in the hearth, a horizontal annular extension part is arranged at the open end of the crucible 4, the annular extension part is erected at the open end of the hearth, and a crucible cover 41 for sealing the crucible 4 is hinged on the annular extension part.

As shown in FIG. 2, a combustion chamber 5 is formed between the crucible 4 and the firebrick layer in the furnace, and a pulse type igniter 51 is provided in the combustion chamber 5. The fuel storage chamber 2 contains sufficient fuel, the fuel storage chamber 2 is connected with the combustion chamber 5 through a feeding pipe 21, a feeding valve 22 is arranged on the feeding pipe 21, and the fuel storage chamber 2 feeds the fuel into the combustion chamber 5 through the feeding pipe 21; the pulse type igniter 51 can burn the fuel from the fuel storage chamber 2, and the fuel is burned in the combustion chamber 5 to heat the crucible 4.

As shown in fig. 2, the combustion air delivery device includes a blower 7 and an air supply duct 71, and the blower 7 and the air supply duct 71 are connected to each other; the flue gas treatment device comprises a heat storage chamber 3, a heat exchanger 31 is arranged in the heat storage chamber 3, an air supply pipe 71 is communicated with the heat exchanger 31 in the heat storage chamber 3, an air supply pipe 72, a smoke guide pipe 8 and a smoke exhaust pipe 82 are arranged on the heat storage chamber 3, the air supply pipe 72 and the smoke guide pipe 8 are respectively communicated with the combustion chamber 5, a first one-way valve 73 for enabling air to flow into the combustion chamber 5 is arranged on the air supply pipe 72, and a second one-way valve 81 for enabling flue gas to flow into the heat exchanger 31 is arranged on the smoke guide pipe 8.

As shown in fig. 2, the bottom of the combustion chamber 5 is further provided with an ash collection groove 6, and the furnace body 1 is provided with an air supply channel 61 and an ash removal channel 62 which are communicated with the ash collection groove 6, the ash removal channel 62 extends to the outer wall of the furnace body 1, and the outer wall of the furnace body 1 is provided with a sealing cover 63 for sealing the ash removal channel 62. An air supply pipe 9 communicated with the air supply pipe 71 is arranged on the air supply pipe 71, an air supply valve 91 is arranged on the air supply pipe 9, and the other end of the air supply pipe 9 is communicated with the air supply channel 61.

The specific implementation mode of the scheme is as follows:

when the crucible is used, firstly, solid metal is put into the crucible 4, and the crucible cover 41 is covered on the crucible 4, so that the inside of the crucible 4 is in a relatively closed state.

The blower 7 is turned on, the first check valve 73 is opened, the blower 7 uses outside air as combustion improver, the outside air is continuously conveyed into the combustion chamber 5 sequentially through the air supply pipe 71, the heat accumulation chamber 3 and the air supply pipe 72, and sufficient air as combustion improver is ensured in the combustion chamber 5. Then, the feed valve 22 of the feed pipe 21 is opened, the fuel in the fuel storage chamber 2 is fed into the combustion chamber 5 through the feed pipe 21, the fuel is ignited by the pulse type igniter 51, the fuel is combusted in the combustion chamber 5, and the crucible 4 is heated, so that the metal in the crucible 4 is gradually melted.

During the combustion of the fuel in the combustion chamber 5, a large amount of high temperature flue gas is continuously generated. The second one-way valve 81 on the smoke guide pipe 8 is opened, so that the smoke in the combustion chamber 5 is guided into the heat accumulation chamber 3 through the smoke guide pipe 8, the heat exchanger 31 in the heat accumulation chamber 3 exchanges heat between a large amount of heat attached in the smoke and air serving as a combustion improver, the waste heat in the smoke is fully utilized, the smoke is discharged outwards through the smoke exhaust pipe 82 after being subjected to heat exchange through the heat exchanger 31, the temperature of the air serving as the combustion improver is increased under the action of the heat exchanger 31, and the air is conveyed into the combustion chamber 5 through the air supply pipe 72 to supply the combustion improver to the combusted fuel, so that the heat efficiency in the combustion chamber 5 is greatly improved, and the energy consumption is reduced.

When the solid metal in the crucible 4 is heated to a molten state, the feed valve 22 of the feed pipe 21 is closed, and the supply of the fuel into the combustion chamber 5 is stopped. During the combustion of the fuel in the combustion chamber 5, a large amount of furnace ash is generated, the furnace ash falls into the ash collecting groove 6 at the bottom of the combustion chamber 5, air is sent into the air supply channel 61 through the air supply pipe 71 and the air supply pipe 9 in sequence by the blower 7, the air forms high-speed airflow in the air supply channel 61, and the furnace ash in the ash collecting groove 6 is blown into the ash cleaning channel 62, so that the furnace ash is discharged out of the furnace body 1 through the ash cleaning channel 62.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. An energy-saving gas crucible furnace is characterized in that: the device comprises a furnace body (1), a fuel storage chamber (2), a combustion air conveying device and a flue gas treatment device, wherein a crucible (4) is arranged in a hearth of the furnace body (1), a combustion chamber (5) for fuel combustion is formed between the crucible (4) and the hearth, and an igniter (51) is arranged in the combustion chamber (5); a feeding pipe (21) is connected between the fuel storage chamber (2) and the combustion chamber (5), and a feeding valve (22) is installed on the feeding pipe (21); the combustion air delivery device comprises a blower (7) and an air supply pipe (71); the flue gas treatment device comprises a heat storage chamber (3), a heat exchanger (31) is arranged in the heat storage chamber (3), an air supply pipe (71) is communicated with the heat exchanger (31) in the heat storage chamber (3), an air supply pipe (72), a smoke guide pipe (8) and a smoke exhaust pipe (82) are arranged on the heat storage chamber (3), the air supply pipe (72) and the smoke guide pipe (8) are communicated with a combustion chamber (5) respectively, the air supply pipe (72) is located below the smoke guide pipe (8), a first one-way valve (73) used for enabling air to flow into the combustion chamber (5) is arranged on the air supply pipe (72), and a second one-way valve (81) used for enabling the flue gas to flow into the heat exchanger (31) is arranged on the smoke guide pipe (8).

2. An energy saving gas crucible furnace as claimed in claim 1, wherein: the bottom of the combustion chamber (5) is provided with an ash collecting groove (6), and an air supply channel (61) and an ash cleaning channel (62) which are communicated with the ash collecting groove (6) are arranged in the furnace body (1).

3. An energy saving gas crucible furnace as claimed in claim 2, wherein: and an air supply pipe (9) communicated with the air supply pipe (71) is arranged on the air supply pipe (71), the air supply pipe (9) is communicated with the air supply channel (61), and an air supply valve (91) is arranged on the air supply pipe (9).

4. An energy saving gas crucible furnace as claimed in claim 3, wherein: the ash removal channel (62) extends to the outer wall of the furnace body (1), and a sealing cover (63) used for sealing the ash removal channel (62) is arranged on the outer wall of the furnace body (1).

5. An energy saving gas crucible furnace as claimed in claim 1, wherein: the inner wall of the hearth is lined with a refractory brick layer, and the combustion chamber (5) is formed by enclosing the refractory brick layer.

6. An energy saving gas crucible furnace as claimed in claim 1, wherein: the furnace is coated with a heat insulation layer (11), and the heat insulation layer (11) is composed of rock wool boards, steel wire mesh sandwich boards and polystyrene boards.

7. An energy saving gas crucible furnace as claimed in claim 1, wherein: the igniter (51) is a pulse igniter (51).