CN212870796U

CN212870796U - Cupola flue gas waste heat utilization system

Info

Publication number: CN212870796U
Application number: CN202021614460.0U
Authority: CN
Inventors: 余成林; 谭本国
Original assignee: Hunan Xinyuan Cylinder Liner Co ltd
Current assignee: Hunan Xinyuan Cylinder Liner Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-02
Anticipated expiration: 2030-08-05

Abstract

The utility model relates to a cupola flue gas waste heat utilization system, which comprises a heat exchange device, an air blower and a dust remover, wherein a cold air inlet of the heat exchange device is connected with the air blower, a hot air outlet is connected with an air box of the cupola, a high-temperature flue gas inlet is connected with a chimney of the cupola, and a low-temperature flue gas outlet is connected with the dust remover; heat transfer device includes casing, cold collection wind package, hot collection wind package and a plurality of heat exchange tube, high temperature flue gas inlet is located the top of casing, low temperature exhanst gas outlet locates one side of casing bottom, cold collection wind package, hot collection wind package are located respectively between the high temperature flue gas inlet and the low temperature exhanst gas outlet of casing, cold wind import is located cold collection wind package, hot air exitus is located hot collection wind package, it is a plurality of in the casing is located to the heat exchange tube, and its both ends communicate respectively cold collection wind package, hot collection wind package. The utility model discloses a waste heat utilization of cupola furnace exhaust high temperature flue gas has reduced the energy consumption of cupola furnace simultaneously.

Description

Cupola flue gas waste heat utilization system

Technical Field

The utility model relates to an energy-concerving and environment-protective technical field especially relates to a cupola flue gas waste heat utilization system.

Background

The high-temperature flue gas discharged from a chimney of the existing cupola furnace is directly discharged into the atmosphere, so that great energy waste is caused, and simultaneously, a large amount of raised dust is discharged, thereby seriously influencing the ecological environment. Therefore, it is necessary to provide a system for utilizing the residual heat of the flue gas of the cupola furnace, which can recover the heat energy of the high-temperature flue gas discharged from the cupola furnace.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a cupola flue gas waste heat utilization system which can recover heat energy of high-temperature flue gas exhausted by a cupola.

The utility model provides a technical scheme that its technical problem adopted is: the cupola furnace flue gas waste heat utilization system comprises a heat exchange device, an air blower and a dust remover, wherein a cold air inlet of the heat exchange device is connected with the air blower, a hot air outlet of the heat exchange device is connected with an air box of the cupola furnace, a high-temperature flue gas inlet of the heat exchange device is connected with a chimney of the cupola furnace, and a low-temperature flue gas outlet of the heat exchange device is connected with the dust remover;

heat transfer device includes casing, cold collection wind package, hot collection wind package and a plurality of heat exchange tube, high temperature flue gas inlet is located the top of casing, low temperature exhanst gas outlet locates one side of casing bottom, cold collection wind package, hot collection wind package are located respectively between the high temperature flue gas inlet and the low temperature exhanst gas outlet of casing, cold wind import is located cold collection wind package, hot air exitus is located hot collection wind package, it is a plurality of in the casing is located to the heat exchange tube, and its both ends communicate respectively cold collection wind package, hot collection wind package.

The utility model provides a cupola flue gas waste heat utilization system's a preferred embodiment, cold collection wind package and hot collection wind package all encircle the casing sets up, just cold collection wind package is located the below of hot collection wind package.

The utility model provides a better embodiment of cupola flue gas waste heat utilization system, the heat exchange tube is equipped with multiunit, multiunit the heat exchange tube annular array in the casing.

The utility model provides a cupola flue gas waste heat utilization system's a preferred embodiment, each group the heat exchange tube includes the heat exchange tube of a plurality of different length specifications that radial direction set up layer by layer.

The utility model provides a cupola flue gas waste heat utilization system's a preferred embodiment, the heat exchange tube adopts copper heat exchange tube.

In the utility model provides a cupola flue gas waste heat utilization system's a preferred embodiment, the bottom of casing still is equipped with the ash discharge mouth, the ash discharge valve is installed to the ash discharge mouth.

In the preferred embodiment of the cupola furnace flue gas waste heat utilization system provided by the utility model, the shell is located be equipped with the telescopic joint between cold air collection bag and the hot air collection bag.

The utility model provides a cupola flue gas waste heat utilization system's a preferred embodiment, be located in the casing the top of hot collection wind package still is equipped with the grid plate, the grid plate is the conical cover type of invering, is equipped with the ventilation hole of a plurality of equipartitions on it, just the middle part of grid plate is equipped with the ash discharge mouth.

Compared with the prior art, the utility model provides a cupola flue gas waste heat utilization system's beneficial effect is:

the utility model utilizes the heat exchange device to heat the high-temperature flue gas exhausted by the cupola furnace to the inlet air of the cupola furnace, thereby realizing the utilization of the waste heat of the exhausted high-temperature flue gas and simultaneously reducing the energy consumption of the cupola furnace;

two heat transfer device's structure not only has good heat transfer performance, still has the effect of dust removal simultaneously concurrently, and high temperature flue gas is through a plurality of most dust in the flue gas can be gone out to the heat exchange tube, and the dust can be discharged by unloading the ash mouth, and the exhaust low temperature flue gas of heat transfer device is being further removed dust by the dust remover and is being discharged simultaneously, can not cause environmental pollution.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural view of a cupola flue gas waste heat utilization system provided by the present invention;

FIG. 2 is a schematic structural diagram of the heat exchange device provided in FIG. 1;

fig. 3 is a sectional view a-a of the heat exchange device provided in fig. 2.

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 described embodiments 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 efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1, the system 1 for utilizing the residual heat of the flue gas of the cupola furnace in the embodiment includes a heat exchange device 11, an air blower 12 and a dust remover 13, wherein a cold air inlet 1101 of the heat exchange device 11 is connected to the air blower 12, a hot air outlet 1102 is connected to an air box of the cupola furnace, a high-temperature flue gas inlet 1103 is connected to a chimney of the cupola furnace, a low-temperature flue gas outlet 1104 is connected to the dust remover 13, and a bag-type dust remover is preferably used for the dust remover 13 in the embodiment.

The embodiment utilizes the heat exchange device to heat the inlet air of the cupola furnace by the high-temperature flue gas exhausted by the cupola furnace, thereby realizing the utilization of the waste heat of the exhausted high-temperature flue gas and reducing the energy consumption of the cupola furnace.

Preferably, referring to fig. 2 and 3, the heat exchanging device 11 of this embodiment includes a housing 111, a cold air collecting bag 112, a hot air collecting bag 113, and a plurality of heat exchanging pipes 114, the high temperature flue gas inlet 1103 is disposed at the top of the housing 11, the low temperature flue gas outlet 1104 is disposed at one side of the bottom of the housing 11, the cold air collecting bag 112 and the hot air collecting bag 113 are respectively disposed between the high temperature flue gas inlet 1103 and the low temperature flue gas outlet 1104 of the housing 111, the cold air inlet 1101 is disposed in the cold air collecting bag 112, the hot air outlet 1102 is disposed in the hot air collecting bag 113, and the plurality of heat exchanging pipes 114 are disposed in the housing 111, and two ends of the heat exchanging pipes are respectively communicated with the cold air collecting bag 112 and the hot air collecting bag 113.

The heat exchange device of the embodiment utilizes high-temperature flue gas exhausted by the cupola to heat the heat exchange tube, indirectly heats cold air, improves the temperature of air fed into an air box of the cupola to about 200 ℃, and can approximately improve the melting speed of substances in the cupola by more than 20%.

Preferably, in order to reduce the heat energy loss of the hot air transportation, heat preservation cotton (not shown in the figure) is arranged on the hot air collecting bag and the hot air delivery pipe.

Example two

On the basis of the first embodiment, the cold air collecting bag 112 and the hot air collecting bag 113 of the present embodiment both surround the casing 111, and the cold air collecting bag 112 is disposed below the hot air collecting bag 113, so that the cold air and the high temperature flue gas are arranged in a countercurrent manner, and the heat exchange effect is better.

EXAMPLE III

On the basis of the first or second embodiment, the heat exchange tubes 114 of this embodiment are provided with a plurality of sets, and the plurality of sets of heat exchange tubes 114 are annularly arrayed on the shell 111, as shown in fig. 3.

Preferably, each group of the heat exchange tubes 114 comprises a plurality of heat exchange tubes with different length specifications, which are arranged layer by layer in the radial direction, as shown in fig. 2.

The heat exchange tube structure of this embodiment can play the effect of dust removal, can remove most large granule dust in the flue gas.

Preferably, the heat exchange tube 114 is a copper heat exchange tube, which has high heat exchange efficiency, and may also be a heat exchange tube made of other materials, such as a steel tube.

Example four

On the basis of the third embodiment, in the present embodiment, the bottom of the housing 111 is further provided with a dust discharge port 1105, the dust discharge port 1105 is provided with a dust discharge valve 14, and the dust discharge valve can adopt an electric dust discharge valve to discharge dust in the heat exchange device at regular time.

EXAMPLE five

Based on any of the above embodiments, the shell 111 is provided with the expansion joint 1110 between the cold wind collecting bag 112 and the hot wind collecting bag 113, and the expansion joint can solve the problem that the weld joint is damaged due to temperature change.

EXAMPLE six

Based on any of the above-mentioned embodiment, this embodiment is located in casing 111 the top of hot air collection package 113 still is equipped with air distribution plate 15, can be with the periphery of high temperature flue gas distribution and casing, air distribution plate is the awl cover type of invering, is equipped with the ventilation hole of a plurality of equipartitions on it, just air distribution plate 15's middle part is equipped with dust exhaust port 150, the air distribution plate and the dust exhaust port of the awl cover type of invering, the dust of being convenient for is discharged.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the present specification can be changed, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The utility model provides a cupola flue gas waste heat utilization system which characterized in that: the device comprises a heat exchange device, an air blower and a dust remover, wherein a cold air inlet of the heat exchange device is connected with the air blower, a hot air outlet is connected with an air box of the cupola furnace, a high-temperature flue gas inlet is connected with a chimney of the cupola furnace, and a low-temperature flue gas outlet is connected with the dust remover;

2. The cupola furnace flue gas waste heat utilization system according to claim 1, wherein: the cold air collecting bag and the hot air collecting bag are all surrounded on the shell, and the cold air collecting bag is arranged below the hot air collecting bag.

3. The cupola furnace flue gas waste heat utilization system according to claim 1, wherein: the heat exchange tubes are provided with a plurality of groups which are annularly arrayed on the shell.

4. The cupola furnace flue gas waste heat utilization system according to claim 3, wherein: each group of heat exchange tubes comprises a plurality of heat exchange tubes with different length specifications, which are arranged layer by layer in the radial direction.

5. The cupola furnace flue gas waste heat utilization system according to claim 3, wherein: the heat exchange tube adopts a copper heat exchange tube.

6. The cupola furnace flue gas waste heat utilization system according to claim 1, wherein: the bottom of the shell is also provided with an ash discharge port, and an ash discharge valve is installed at the ash discharge port.

7. The cupola furnace flue gas waste heat utilization system according to claim 1, wherein: the shell is positioned between the cold air collecting bag and the hot air collecting bag and is provided with an expansion joint.

8. The cupola furnace flue gas waste heat utilization system according to claim 2, wherein: the shell is internally provided with an air distribution plate above the heat air collection bag, the air distribution plate is in an inverted conical cover shape, a plurality of uniformly distributed ventilation holes are formed in the air distribution plate, and the middle of the air distribution plate is provided with an ash discharge port.