CN216668379U - Silicon carbide heat exchanger - Google Patents

Abstract

The utility model discloses a silicon carbide heat exchanger, which relates to the technical field of heat exchangers. The utility model comprises a casing; a plurality of silicon carbide heat exchange tubes arranged in parallel horizontally are arranged in the casing, and a head is arranged at both ends of the casing; a plurality of baffles are vertically interspersed on the plurality of silicon carbide heat exchange tubes; A first sealing tube sheet and a second sealing sheet are arranged between the casing and the head, and the first sealing tube sheet is located on one side of the casing; the first sealing tube sheet and the second sealing sheet are detachably fixed by screw nuts It is installed between the casing and the head; the first sealing tube sheet and the second sealing sheet are both provided with sealing holes for inserting silicon carbide heat exchange tubes. The utility model has the advantages of simple structure between the first sealing tube sheet, the second sealing tube sheet and the silicon carbide heat exchange tube, and the manufacture and installation are convenient, the technical requirements for the staff are reduced, the work efficiency is improved, the tube sheet and the shell are The effective seal between them ensures that the medium will not be polluted under strong corrosive conditions.

Description

A silicon carbide heat exchanger

technical field

The utility model belongs to the technical field of heat exchangers, in particular to a silicon carbide heat exchanger.

Background technique

A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used. . With the continuous development of my country's industry, whether it is the requirements of the production process or the need for energy recovery, a large number of heat exchange equipment are used, but in the process of use, the problem of heat exchanger damage caused by corrosion is quite serious. The corrosion and damage of the heat exchanger not only causes the equipment to be scrapped and pays a lot of maintenance costs, but also directly affects the smooth progress of production. The losses caused by frequent shutdowns are immeasurable.

The heat exchangers in the prior art have the following defects:

(1) Metal heat exchangers have high thermal conductivity, but have poor corrosion resistance to strong acid and alkali media. For example, stainless steel heat exchangers have high heat exchange efficiency, but are easily eroded by chloride ions and fail.

(2) The glass heat exchanger has good corrosion resistance, but the pressure resistance is low, it is easy to break, leak, and the thermal conductivity is low.

(3) The PTFE heat exchanger is corrosive, but the thermal conductivity is low, the cost is high, and it is not easy to repair after damage.

(4) The thermal conductivity of the glass-lined heat exchanger is low, it is easy to explode, and the volume is huge.

(5) The graphite heat exchanger has low pressure resistance, low thermal conductivity and high cost. It has high requirements for heat exchange medium and is easy to corrode and leak.

If the material and form of the heat exchanger can be reasonably determined according to the requirements of the medium, the conditions of the production process, and the economic indicators, it will become an urgently needed product to improve the corrosion resistance of the heat exchanger and prolong its service life.

Utility model content

The purpose of this utility model is to provide a silicon carbide heat exchanger, which has the advantages of simple structure between the first sealed tube sheet, the second sealed tube sheet and the silicon carbide heat exchange tube, easy to manufacture and install, and reduces the technical requirements for the staff. Requirements, improve the work efficiency, the effective sealing between the tube sheet and the shell ensures that the medium is not polluted in the strong corrosion environment, and solves the existing problems.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions:

The utility model relates to a silicon carbide heat exchanger, which comprises a casing; a plurality of silicon carbide heat exchange tubes arranged in parallel horizontally are arranged in the casing, and both ends of the casing are provided with a head; A plurality of baffle plates are vertically inserted on the silicon carbide heat exchange tube; a first sealing tube sheet and a second sealing sheet layer are arranged between the casing and the head, and the first sealing tube sheet is located in the casing one side; the first sealing tube sheet and the second sealing sheet are detachably and fixedly installed between the casing and the head through a screw nut; the first sealing tube sheet and the Sealing holes for inserting silicon carbide heat exchange tubes are formed on the two sealing plate layers; the second sealing plate layer is provided with a threaded groove on one side of the head, and the threaded groove and the sealing hole are coaxially arranged; The end of the threaded groove is provided with a sealing groove; the threaded groove is threadedly connected with a nut for the inner hole of the outer wire for fixing the silicon carbide heat exchange tube; a set of seal grooves and the silicon carbide heat exchange tube are connected between the sealing groove and the silicon carbide heat exchange tube. The sealing part is sealed; the end of the nut is provided with a pressing ring for pressing a group of the sealing parts.

Further, a group of the sealing components includes three PTFE sealing flat gaskets arranged in sequence and an O-shaped rubber ring arranged between two adjacent PTFE sealing flat gaskets.

Further, the first sealing tube sheet comprises carbon steel plate or stainless steel plate; the sealing ring on the end of the sealing hole on the sealing tube sheet is provided with a sealing ring matched with the silicon carbide heat exchange tube.

Further, the material of the second sealing plate layer is a tetrafluoro plate.

Further, the first sealing tube sheet is fixedly connected to the flange provided outside the casing by bolts.

The utility model has the following beneficial effects:

1. The structure between the first sealed tube sheet, the second sealed tube sheet and the silicon carbide heat exchange tube of the present invention is simple, the manufacture and installation are convenient, the technical requirements for the staff are reduced, and the work efficiency is improved.

2. The silicon carbide heat exchanger of the utility model effectively ensures the effective sealing between the tube sheet and the silicon carbide heat exchange tube, and between the tube sheet and the shell, ensures that the medium is not polluted under the strong corrosion condition, and avoids the Damage to heat exchangers caused by corrosion meets the stringent standards of the pharmaceutical and food industries.

3. The thermal conductivity of the silicon carbide heat exchanger of the present utility model is much higher than that of other corrosion-resistant materials. With the same heat exchange efficiency, less heat exchange area is used, allowing a smaller size of the heat exchanger, greatly reducing the occupied space and reducing the use of cost.

Of course, any product implementing the present invention does not necessarily need to simultaneously achieve all of the above-mentioned advantages.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required to describe the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural representation of a kind of silicon carbide heat exchanger of the utility model;

FIG. 2 is a schematic diagram of the partial structure of the silicon carbide heat exchange tube and the second sealed tube sheet;

In the accompanying drawings, the list of components represented by each number is as follows:

1-shell, 2-silicon carbide heat exchange tube, 3-head, 4-first sealing tube sheet, 5-second sealing tube sheet, 6-baffle plate, 7-sealing hole, 8-thread groove, 9- Sealing groove, 10- Nut, 11- Sealing part, 12- Pressure ring, 13- PTFE sealing flat gasket, 14- O-type rubber ring.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Fig. 1-2, the utility model is a silicon carbide heat exchanger, comprising a casing 1; a plurality of silicon carbide heat exchange tubes 2 arranged in parallel horizontally are arranged in the casing 1, and both ends of the casing 1 Each is provided with a head 3; a plurality of silicon carbide heat exchange tubes 2 are vertically interspersed with a plurality of baffles 6; a first sealing tube plate 4 and a second sealing plate layer 5 are arranged between the shell 1 and the head 3 , the first sealing tube sheet 4 is located on the side of the casing 1; the first sealing tube sheet 4 and the second sealing sheet layer 5 are detachably fixed and installed between the casing 1 and the head 3 through the screw nut; the first sealing tube Both the plate 4 and the second sealing plate layer 5 are provided with sealing holes 7 for inserting the silicon carbide heat exchange tubes 2;

The second sealing plate layer 5 is provided with a threaded groove 8 on one side of the head 3, and the threaded groove 8 is coaxial with the sealing hole 7; the end of the threaded groove 8 is provided with a sealing groove 9; The nut 10 of the inner hole of the outer wire fixed by the heat pipe 2; the sealing groove 9 and the silicon carbide heat exchange tube 2 are sealed by a set of sealing parts 11; the end of the nut 10 is provided for pressing a set of sealing parts 11 the pressure ring 12.

Among them, a set of sealing members 11 includes three PTFE sealing flat gaskets 13 arranged in sequence and an O-shaped rubber ring 14 arranged between two adjacent PTFE sealing flat gaskets 13 .

Wherein, the first sealed tube sheet 4 comprises carbon steel plate or stainless steel plate; the end of the sealing hole 7 on the sealed tube sheet 4 is provided with a sealing ring matched with the silicon carbide heat exchange tube 2 .

Wherein, the material of the second sealing plate layer 5 is a tetrafluoro plate.

Wherein, the first sealing tube sheet 4 is fixedly connected to the flange provided outside the casing 1 by bolts.

The specific application of the silicon carbide heat exchanger of the utility model is as follows: the silicon carbide heat exchanger effectively ensures the effective sealing between the tube sheet and the silicon carbide heat exchange tube 2, and between the tube sheet and the shell, and ensures that the It does not pollute the medium in the working environment, avoids damage to the heat exchanger caused by corrosion, and can meet the harsh standards of the pharmaceutical and food industries. The thermal conductivity of the silicon carbide heat exchanger is much higher than that of other corrosion-resistant materials. With the same heat exchange efficiency, less heat exchange area is used, allowing a smaller heat exchanger size, greatly reducing the occupied space and reducing the cost of use. In addition, the structure between the tube sheet and the silicon carbide heat exchange tube 2 is simple, the manufacture and installation are convenient, the technical requirements for the staff are reduced, and the work efficiency is improved.

In the description of this specification, description with reference to the terms "one embodiment", "example", "specific example", etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in the present invention. in at least one embodiment or example. In this specification, schematic representations of the above terms 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 preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details, nor do they limit the invention to only the described embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. A silicon carbide heat exchanger comprising a housing (1); a plurality of silicon carbide heat exchange tubes (2) which are transversely arranged in parallel are arranged in the shell (1), and two ends of the shell (1) are respectively provided with an end socket (3); a plurality of baffle plates (6) are vertically inserted into the silicon carbide heat exchange tubes (2);

the method is characterized in that:

a first sealing tube plate (4) and a second sealing plate layer (5) are arranged between the shell (1) and the seal head (3), and the first sealing tube plate (4) is positioned on one side of the shell (1); the first sealing tube plate (4) and the second sealing plate layer (5) are detachably and fixedly arranged between the shell (1) and the seal head (3) through screw nuts;

the first sealing tube plate (4) and the second sealing plate layer (5) are respectively provided with a sealing hole (7) for inserting the silicon carbide heat exchange tube (2);

a thread groove (8) is formed in one side, located on the end socket (3), of the second sealing plate layer (5), and the thread groove (8) and the sealing hole (7) are arranged coaxially;

a sealing groove (9) is formed in the end part of the thread groove (8); a nut (10) of an outer screw inner hole for fixing the silicon carbide heat exchange tube (2) is connected to the thread groove (8) in a threaded manner;

the sealing groove (9) and the silicon carbide heat exchange tube (2) are sealed through a group of sealing parts (11);

the end part of the screw cap (10) is provided with a pressing ring (12) used for extruding the sealing component (11).

2. The silicon carbide heat exchanger according to claim 1, wherein one set of the sealing members (11) comprises three tetrafluoro sealing flat gaskets (13) arranged in sequence and an O-ring rubber (14) arranged between two adjacent tetrafluoro sealing flat gaskets (13).

3. A silicon carbide heat exchanger according to claim 1 wherein the first sealing tube sheet (4) comprises a carbon or stainless steel sheet; and a sealing ring matched with the silicon carbide heat exchange tube (2) is arranged at the end part of a sealing hole (7) in the sealing tube plate (4).

4. A silicon carbide heat exchanger according to claim 1, wherein the second sealing plate layer (5) comprises a tetrafluoro plate.

5. Silicon carbide heat exchanger according to claim 1, characterised in that the first sealing tube plate (4) is fixedly connected to a flange arranged outside the shell (1) by means of bolts.

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