CN209926974U - Heat exchanger - Google Patents

Abstract

The utility model discloses a heat exchanger, which comprises a cylinder body, an upper air chamber, a lower air chamber, an expanding opening and a clamping sleeve, wherein the upper air chamber is arranged at the upper part of the cylinder body, the lower air chamber is arranged at the lower part of the cylinder body, the upper air chamber is communicated with the lower air chamber, a discharge pipe is arranged between the upper air chamber and the lower air chamber, and the discharge pipe runs through the two sides of the cylinder body; the upper air chamber transversely penetrates through and is provided with a flaring, the lower air chamber transversely penetrates through and is provided with a jacket, a rotational flow screen plate is fixedly arranged in the barrel, the top of the rotational flow screen plate is fixed in the flaring, the bottom of the rotational flow screen plate is fixed in the jacket, and a plurality of gas distribution plates are fixedly arranged in the rotational flow screen plate. The utility model provides the high intraductal velocity of flow, intraductal for the thermal coefficient high, the physique resistance is little, hinders to decrease and decreases lowly, and the total coefficient of heat transfer of heat exchanger is high, and heat transfer area saves nearly 50% on original basis about, has improved the efficiency of work.

Description

Heat exchanger

Technical Field

The utility model relates to a chemical industry equipment technical field especially relates to the heat exchanger.

Background

In the production of sulfuric acid by a contact method, most of common gas-gas heat exchangers are fixed tube plate shell-and-tube heat exchangers, and the shell of the gas-gas heat exchanger is divided into a segmental baffle plate heat exchanger, a ring-disk baffle plate heat exchanger and a heat exchanger without baffle plates due to different baffle plate types. The defects of the old heat exchanger are that the heat exchanger for sulfuric acid production has the main defect of low total heat transfer coefficient in the middle 70 s, and the reasons are mainly that: 1. the flow rate in the tubes is too low, typically in the transition flow range, and the heat transfer coefficient in the tubes is low. 2. When segmental baffles are used, the shell side design is not reasonable and the tubes are almost full on the tube sheet. The design of the baffle plate is irregular, and the plate holes are too large, for example, 50% of the baffle plate is cut off; also, if the distance between the centers of the baffle plates is too small, for example, 22% of the distance is cut off, the selected range is narrow, and the selected fouling coefficient value is generally too large because of the inaccuracy of the calculation method. After the heat exchanger operates for a period of time, due to reasons such as corrosion, entrainment and the like, the pipe and the pipe gap are blocked, the total heat transfer coefficient is obviously reduced, the total heat transfer coefficient is only compensated by increasing the fouling coefficient, and a novel efficient heat exchanger is developed aiming at the defects of the old heat exchanger.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a heat exchanger improves intraductal velocity of flow, intraductal for the thermal coefficient high, the physique resistance is little, hinders to decrease and decreases lowly, and the total coefficient of heat transfer of heat exchanger is high, and heat transfer area saves nearly 50% on original basis about, has improved the efficiency of work.

The heat exchanger comprises a cylinder body, an upper air chamber, a lower air chamber, a flaring and a jacket, wherein the upper air chamber is arranged at the upper part of the cylinder body, the lower air chamber is arranged at the lower part of the cylinder body, the upper air chamber is communicated with the lower air chamber, a pipe is placed between the upper air chamber and the lower air chamber, and the pipe runs through two sides of the cylinder body;

the utility model discloses an in some embodiments, the lower air chamber transversely runs through and is provided with the clamp cover, the inside fixed mounting of barrel has the whirl otter board, whirl otter board top is fixed in the flaring, and whirl otter board bottom is fixed in the clamp cover, fixed mounting has a plurality of gas distribution boards in the whirl otter board.

In other embodiments of the present invention, the first inlet has been opened at the top of the upper air chamber, the first outlet has been opened to the side of the flaring, the second inlet has been opened to the side of the jacket, the connecting pipe is connected to the side of the lower air chamber, and the second outlet is provided to one end of the connecting pipe.

In other embodiments of the present invention, a zoom tube is fixedly installed in the swirling screen plate.

In other embodiments of the present invention, a manhole is disposed on the side of the upper air chamber.

In other embodiments of the present invention, an i-shaped supporting frame is fixedly installed at the bottom of the cylinder.

The utility model provides a beneficial effect is: the flow velocity in the pipe is improved to be within the range of (Re >10000), and the heat supply coefficient in the pipe is high; adopting a rotational flow net plate type; the rotational flow length of the turbulent SO3 gas in the tube and the reverse rotational flow SO2 gas outside the tube bundle can reach 10 times of the equivalent diameter of the flow channel; the mode of the temperature gradient at the position close to the wall is increased, and the synergistic effect of the heat transfer field is enhanced; the mode of the flow velocity vector near the wall is increased, and the field synergy of heat transfer is enhanced; the body resistance is small, and the resistance loss is low; the heat transfer coefficient of the traditional heat exchanger is low and K is less than or equal to 17W/(m 2K), and the total heat transfer coefficient of the novel heat exchanger is as high as 36W/(m 2K); the heat exchange area is saved by about 50 percent on the original basis.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the heat exchanger provided by the present invention.

In the figure: 1-upper air chamber, 2-cylinder, 3-lower air chamber, 4-zoom tube, 5-swirl screen, 6-gas distribution plate, 7-jacket, 8-flaring, 9-connecting tube, 10-second outlet, 11-second inlet, 12-first inlet, 13-zoom tube, 14-manhole, 15-first outlet and 16-I-shaped support frame.

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.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, the heat exchanger comprises a cylinder 2, an upper air chamber 1, a lower air chamber 3, a flaring 8 and a jacket 7, wherein the upper air chamber 1 is arranged at the upper part of the cylinder 2, the lower air chamber 3 is arranged at the lower part of the cylinder 2, the upper air chamber 1 is communicated with the lower air chamber 3, a discharge pipe 13 is arranged between the upper air chamber 1 and the lower air chamber 3, and the discharge pipe 13 penetrates through two sides of the cylinder 2;

the lower air chamber 3 is transversely provided with a jacket 7 in a penetrating way, the inside of the cylinder 2 is fixedly provided with a rotational flow screen plate 5, the top of the rotational flow screen plate 5 is fixed in the flaring 8, the bottom of the rotational flow screen plate 5 is fixed in a jacket 7, a plurality of gas distribution plates 6 are fixedly arranged in the rotational flow screen plate 5, the top of the upper gas chamber 1 is provided with a first inlet 12, the first inlet 12 is used for introducing SO3 gas, the side surface of the flaring 8 is provided with a first outlet 15, the first outlet 15 is used for discharging the SO2 gas after reaction, the side surface of the jacket 7 is provided with a second inlet 11, the second inlet 11 is used for introducing SO2 gas, the side surface of the lower gas chamber 3 is connected with a connecting pipe 9, and one end of the connecting pipe 9 is provided with a second outlet 10, the second outlet 10 is used for discharging SO3 gas after reaction, a zoom pipe 134 is fixedly arranged in the rotational flow net plate 5, a manhole 14 is arranged on the side surface of the upper air chamber 1, and an I-shaped support frame 16 is fixedly arranged at the bottom of the cylinder 2.

The working principle is as follows: the purpose of heat exchange of two fluids is achieved through the matching of the rotational flow net plate 5 and the gas distribution plate 6 and the jacket 7 and the flaring opening 8;

aiming at the defects of the old heat exchanger, the novel efficient heat exchanger has the design characteristics that:

1. the flow velocity in the pipe is improved to be within the range of (Re >10000), and the heat supply coefficient in the pipe is high;

2. adopting a rotational flow screen plate 5 type;

3. the rotational flow length of the turbulent SO3 gas in the tube and the reverse rotational flow SO2 gas outside the tube bundle can reach 10 times of the equivalent diameter of the flow channel;

4. the mode of the temperature gradient at the position close to the wall is increased, and the synergistic effect of the heat transfer field is enhanced;

5. the mode of the flow velocity vector near the wall is increased, and the field synergy of heat transfer is enhanced;

6. the included angle of the heat transfer vectors is less than 90 degrees;

7. the body resistance is small, and the resistance loss is low;

8. the heat transfer coefficient of the traditional heat exchanger is low [ K is less than or equal to 17W/(m 2K) ]; the total heat transfer coefficient of the novel heat exchanger is as high as 36W/(m 2K);

9. the heat exchange area is saved by about 50 percent on the original basis.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. 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.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (5)

1. The heat exchanger, its characterized in that: the device comprises a cylinder body, an upper air chamber, a lower air chamber, a flaring and a jacket, wherein the upper air chamber is arranged at the upper part of the cylinder body, the lower air chamber is arranged at the lower part of the cylinder body, the upper air chamber is communicated with the lower air chamber, a discharge pipe is arranged between the upper air chamber and the lower air chamber, and the discharge pipe penetrates through the two sides of the cylinder body;

the upper air chamber transversely penetrates through and is provided with a flaring, the lower air chamber transversely penetrates through and is provided with a jacket, a rotational flow screen plate is fixedly arranged in the barrel, the top of the rotational flow screen plate is fixed in the flaring, the bottom of the rotational flow screen plate is fixed in the jacket, and a plurality of gas distribution plates are fixedly arranged in the rotational flow screen plate.

2. The heat exchanger of claim 1, wherein: the top of the upper air chamber is provided with a first inlet, the side surface of the flaring is provided with a first outlet, the side surface of the jacket is provided with a second inlet, the side surface of the lower air chamber is connected with a connecting pipe, and one end of the connecting pipe is provided with a second outlet.

3. The heat exchanger of claim 1, wherein: and a zoom tube is fixedly arranged in the rotational flow screen plate.

4. The heat exchanger of claim 1, wherein: a manhole is formed in the side face of the upper air chamber.

5. The heat exchanger of claim 1, wherein: an I-shaped support frame is fixedly arranged at the bottom of the cylinder body.

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