CN216282921U

CN216282921U - Heat exchanger and hot-blast stove

Info

Publication number: CN216282921U
Application number: CN202122201584.7U
Authority: CN
Inventors: 胡彪; 徐燕; 张小华; 曾晶
Original assignee: Fogang Ming Yang Machinery Co ltd
Current assignee: Fogang Ming Yang Machinery Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-04-12
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a heat exchanger and a hot blast stove, wherein the heat exchanger is provided with a fluid inlet and a fluid outlet and comprises at least two heat exchange units, each heat exchange unit comprises at least one heat exchange tube, the diameter of the heat exchange tube in the rear heat exchange unit is less than or equal to that of the heat exchange tube in the front heat exchange unit along the sequence of the fluid flowing through each heat exchange unit; the fluid inlet and the fluid outlet are respectively arranged at two sides of the heat exchanger. According to the heat exchanger provided by the utility model, the fluid inlet and the fluid outlet are respectively arranged at two sides of the heat exchanger, so that the fluid can be fully circulated in the heat exchanger to realize heat exchange, and the heat exchange efficiency is improved. Simultaneously, the technical scheme sets the pipe diameters of the heat exchange pipes of different heat exchange units differently, so that the heat exchange pipes can be effectively prevented from being blocked by scale when full heat exchange is realized, and the service life of the heat exchanger is prolonged.

Description

Heat exchanger and hot-blast stove

Technical Field

The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchanger and a hot blast stove.

Background

The hot blast stove is a device for increasing the temperature of process materials and high-temperature flue gas through heat exchange of a heat exchanger. The hot blast stove has special operation condition, the medium heated by high-temperature flue gas achieves the purpose of high-temperature vaporization, but the medium is easy to generate coking condition due to overhigh temperature, and the heat exchanger is blocked, thereby reducing the heat exchange efficiency and increasing the cleaning frequency and the use cost.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, the utility model provides a heat exchanger and a hot blast stove, which adopt the following technical scheme:

the heat exchanger provided by the utility model is provided with a fluid inlet and a fluid outlet and comprises at least two heat exchange units, each heat exchange unit comprises at least one heat exchange tube, the tube diameter of the heat exchange tube in the rear heat exchange unit is less than or equal to that of the heat exchange tube in the front heat exchange unit in the sequence that the fluid flows through each heat exchange unit; the fluid inlet and the fluid outlet are respectively arranged at two sides of the heat exchanger.

In some embodiments of the present invention, when the heat exchange unit includes a plurality of heat exchange tubes, the tube diameters of the plurality of heat exchange tubes are kept constant or gradually reduced along the fluid flowing direction.

In some embodiments of the utility model, the heat exchange tube is a stainless steel heat exchange tube.

In certain embodiments of the present invention, the heat exchanger comprises a first heat exchange unit disposed at the fluid inlet and a second heat exchange unit disposed at the fluid outlet.

In some embodiments of the present invention, the outer wall of the heat exchange tube of the second heat exchange unit is provided with a heat dissipation fin.

In some embodiments of the present invention, heat exchange boxes are disposed at both sides of the heat exchange unit to allow fluid to flow sufficiently.

In some embodiments of the utility model, the heat exchange box comprises a dust cleaning port for periodically cleaning dust impurities.

In some embodiments of the utility model, the heat exchanger includes a heat probe for measuring the temperature of the fluid.

In some embodiments of the utility model, the heat probe is disposed at the fluid inlet.

The utility model also provides a hot blast stove which comprises the heat exchanger.

The embodiment of the utility model has at least the following beneficial effects: according to the heat exchanger provided by the utility model, the fluid inlet and the fluid outlet are respectively arranged at two sides of the heat exchanger, so that the fluid can be fully circulated in the heat exchanger to realize heat exchange, and the heat exchange efficiency is improved. Simultaneously, the technical scheme sets the pipe diameters of the heat exchange pipes of different heat exchange units differently, so that the heat exchange pipes can be effectively prevented from being blocked by scale when full heat exchange is realized, and the service life of the heat exchanger is prolonged.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a heat exchanger;

fig. 2 is a schematic distribution diagram of heat exchange tubes of the heat exchanger.

Reference numerals: 10. a first heat exchange unit; 20. a second heat exchange unit; 30. a heat exchange box; 31. cleaning the ash hole; 40. a heat probe.

Detailed Description

Embodiments of the utility model, examples of which are illustrated in the accompanying drawings, are described in detail below with reference to fig. 1-2, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., are used in an orientation or positional relationship indicated based on the drawings, it is merely for convenience of description and simplicity of description, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, is not to be considered as limiting the present invention. The features defined as "first" and "second" are used to distinguish feature names rather than having a special meaning, and further, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model relates to a heat exchanger provided with a fluid inlet and a fluid outlet. Specifically, the fluid inlet and the fluid outlet are respectively arranged on two sides of the heat exchanger, so that the fluid can be fully circulated in the heat exchanger to realize heat exchange, and the heat exchange efficiency of the heat exchanger is improved. The heat exchanger comprises at least two heat exchange units, each heat exchange unit comprises at least one heat exchange tube, the fluid flows through the heat exchange units in sequence, and the diameter of the heat exchange tube in the rear heat exchange unit is smaller than or equal to that of the heat exchange tube in the front heat exchange unit. With reference to the attached drawings, the fluid flows through each heat exchange unit in turn along an S-shaped route in the heat exchanger. Through the pipe diameter difference setting with the heat exchange tube, can effectively prevent heat exchange tube scaling jam when realizing abundant heat transfer, extension heat exchanger life.

Further, when the heat exchange unit comprises a plurality of heat exchange tubes, the tube diameters of the plurality of heat exchange tubes are kept constant or gradually reduced along the sequence of fluid flowing through. When the heat exchange unit includes many heat exchange tubes, can set up to many heat exchange tubes that the pipe diameter is the same, also can set up to many heat exchange tubes that the pipe diameter is different, the heat exchange tube pipe diameter in back is less than or equal to preceding heat exchange tube in order to optimize heat exchange efficiency.

In this embodiment, the heat exchanger includes a first heat exchange unit 10 and a second heat exchange unit 20, specifically, the first heat exchange unit 10 is disposed at the fluid inlet, the second heat exchange unit 20 is disposed at the fluid outlet, and a heat exchange pipe diameter of the second heat exchange unit 20 is smaller than a heat exchange pipe diameter of the first heat exchange unit 10. According to different use requirements, more groups of heat exchange units can be arranged in the heat exchanger, and the fluid inlet and the fluid outlet are sequentially communicated through the plurality of groups of heat exchange units to finish heat exchange.

When the number of the heat exchange units is set to three groups, the heat exchange tubes of the three groups of the heat exchange units are at least set to be two different tube diameters, and the tube diameter of the heat exchange tube close to the fluid outlet is smaller than that of the heat exchange tube close to the fluid inlet, so that the fluid flows through the heat exchange tubes with the two different tube diameters to realize sufficient heat exchange.

Further, the heat exchange tube is a stainless steel heat exchange tube. The stainless steel pipe has good processing performance and heat exchange performance, better strength and excellent corrosion resistance. The stainless steel pipe is adopted as the heat exchange pipe, so that the production cost, the maintenance and replacement cost of the heat exchanger can be reduced, and the heat exchange efficiency of the heat exchange pipe can be improved. It can be understood that, according to different use conditions, the first heat exchange unit 10 and the second heat exchange unit 20 may respectively adopt different types of stainless steel to meet different requirements of high temperature resistance and the like.

Further, the outer wall of the second heat exchange unit 20 is provided with heat dissipation fins. The heat exchange area of the heat exchanger can be effectively increased by arranging the radiating fins on the outer wall of the heat exchange tube, and the heat exchange efficiency is improved. In the embodiment, the heat dissipation fins are stainless steel fins, so that the heat dissipation fins have good heat exchange performance, are low in cost and are easy to process.

Referring to the drawings, heat exchange boxes 30 are provided at both sides of the heat exchange unit to allow fluid to flow sufficiently. Compared with the traditional heat exchanger adopting the U-shaped pipe fitting to communicate with the heat exchange pipes, the heat exchange boxes 30 are arranged on the two sides of the heat exchange unit to be connected with the heat exchange pipes, so that sufficient space for fluid flowing heat exchange can be provided, the heat exchange efficiency is effectively improved, and the space is fully utilized for heat exchange. Specifically, the heat exchange tank 30 is provided in plurality depending on the use condition. In this embodiment, the heat exchanger top is provided with four heat transfer casees, and the bottom is provided with three heat transfer casees.

Further, the heat exchange box 30 includes a dust cleaning port 31 for periodically cleaning dust impurities. With reference to the attached drawings, the heat exchange boxes at the two ends of the heat exchange unit are provided with ash cleaning ports 31. High-temperature flue gas generated in a hot blast stove flows through the heat exchanger, and faults such as a coking structure and the like easily occur, so that the heat exchanger needs to be cleaned and maintained regularly. Through setting up deashing mouth 31, the staff can more conveniently regularly clear up the deposition etc. of heat exchanger, ensures the result of use of heat exchanger.

With reference to the figures, the heat exchanger includes a probe 40 for measuring the temperature of the fluid. Further, a heat sensing needle 40 is provided at the fluid inlet to monitor the temperature of the fluid flowing into the heat exchanger in real time. It will be appreciated that the probe 40 may also be positioned at the heat exchange box 30 or at the fluid outlet to monitor the real-time temperature of the fluid at different locations, depending on the application.

Further, the pipe diameter of the heat exchange pipe of the first heat exchange unit 10 is 100mm, and the pipe diameter of the heat exchange pipe of the second heat exchange unit 20 is 60 mm. In this embodiment, the first heat exchange unit 10 is provided with 95 heat exchange tubes, and the second heat exchange unit 20 is provided with 43 heat exchange tubes, and the fluid exchanges heat through the great first heat exchange unit 10 of pipe diameter earlier and in circulation in-process deposit impurity such as dust to the heat transfer case 30, then further abundant heat transfer through the second heat exchange unit 20 that is provided with radiating fin, improves the heat exchange efficiency of heat exchanger. The impurity when the fluid circulates through first heat exchange unit 10 deposits, can effectively avoid the scale deposit to block up the heat exchange tube when the less second heat exchange unit 20 of pipe diameter circulates, guarantees the smooth and easy operation of heat exchanger.

The utility model relates to a hot blast stove which comprises a heat exchanger as described above. By adopting the heat exchanger, the heat exchange efficiency of the hot blast stove can be effectively improved, and the production cost is reduced.

In the description herein, references to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A heat exchanger provided with a fluid inlet and a fluid outlet, characterized in that: the heat exchange unit comprises at least two heat exchange units, each heat exchange unit comprises at least one heat exchange tube, fluid flows through the heat exchange units in sequence, and the diameter of the heat exchange tube in the rear heat exchange unit is smaller than or equal to that of the heat exchange tube in the front heat exchange unit; the fluid inlet and the fluid outlet are respectively arranged at two sides of the heat exchanger.

2. The heat exchanger of claim 1, wherein: when the heat exchange unit comprises a plurality of heat exchange tubes, the tube diameters of the heat exchange tubes are kept unchanged or gradually reduced along the sequence of fluid flowing through.

3. The heat exchanger of claim 1, wherein: the heat exchange tube is a stainless steel heat exchange tube.

4. The heat exchanger of claim 1, wherein: the heat exchanger comprises a first heat exchange unit (10) and a second heat exchange unit (20), wherein the first heat exchange unit (10) is arranged at a fluid inlet, and the second heat exchange unit (20) is arranged at a fluid outlet.

5. The heat exchanger of claim 4, wherein: and heat radiating fins are arranged on the outer wall of the heat exchange tube of the second heat exchange unit (20).

6. The heat exchanger of claim 1, wherein: and heat exchange boxes (30) are arranged on two sides of the heat exchange unit and are used for full circulation of fluid.

7. The heat exchanger of claim 6, wherein: the heat exchange box (30) comprises a dust cleaning opening (31) for periodically cleaning dust and impurities.

8. The heat exchanger of claim 1, wherein: the heat exchanger comprises a heat probe (40) for measuring the temperature of the fluid.

9. The heat exchanger of claim 8, wherein: the heat probe (40) is disposed at the fluid inlet.

10. A hot blast stove is characterized in that: comprising a heat exchanger according to any of claims 1-9.