Heat exchange device for reaction system

Abstract

The utility model provides a heat exchange device for a reaction system, which relates to the technical field of heat exchangers and comprises a lower shell, first flange pieces are fixedly connected to the outer surfaces of the two sides of the lower shell, and first connecting pieces are fixedly connected to the positions, close to the top, of the outer surfaces of the front side and the rear side of the lower shell. According to the utility model, when the device needs to be maintained and cleaned, the third flange piece and the second flange piece are separated by detaching the bolts on the third flange piece, the first tube box and the second tube box are detached, and then the bolts on the first connecting piece and the second connecting piece are detached, so that the first tube box and the second tube box are detached. The effect of separating the upper shell from the lower shell is achieved, then the heat exchange assembly is taken out upwards after the upper shell is taken down, the whole heat exchanger can be disassembled, the heat exchanger which is completely disassembled and disassembled is very convenient to clean and maintain, and the cleaning effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical heat exchange, in particular to a heat exchange device for a reaction system. Background Art

[0002] In the production process of petrochemical reaction system, unconverted oil needs to be heated to about 120℃ before it can be transported to the reactor through a high-pressure feed pump. The traditional way is to use the high temperature of the middle-section oil production to add a heat exchanger to heat the unconverted oil. The heat exchanger uses unconverted oil in the tube side and middle-section oil in the shell side. The production temperature of the middle-section oil is about 190℃, and the temperature of the unconverted oil from the tank area is about 45℃. The temperature of the unconverted oil can reach about 120℃-140℃ through heat exchange by the heat exchanger.

[0003] The cylindrical shell, tube sheet and heat transfer tube bundle in the traditional shell and tube heat exchanger are welded together to form a whole. When the heat exchanger needs to be cleaned, it is necessary to add cleaning liquid to the hot fluid inlet and outlet pipes to make it flow into the cylindrical shell for cleaning. Since the internal structure of the cylindrical shell cannot be disassembled, it is difficult to clean and the cleaning effect is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a heat exchange device for a reaction system, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat exchange device for a reaction system, comprising a lower shell, both side outer surfaces of the lower shell are fixedly connected with first flanges, front and rear outer surfaces of the lower shell are fixedly connected with first connecting members near the top, a middle oil input pipe is arranged at the bottom of the lower shell near the left edge, an upper shell is arranged at the top of the lower shell, both side outer surfaces of the upper shell are fixedly connected with second flanges, front and rear outer surfaces of the upper shell are fixedly connected with second connecting members near the bottom, a middle oil output pipe is arranged at the top of the upper shell near the right edge, and a heat exchange component is arranged between the inner surface walls of the lower shell and the upper shell.

[0006] Furthermore, the heat exchange assembly includes two tube sheets, a plurality of heat transfer tubes are arranged between the outer surfaces of the two tube sheets, and a baffle is arranged between the outer surfaces of the plurality of heat transfer tubes.

[0007] Furthermore, the baffles are arranged in a semicircular shape, and a plurality of the baffles are arranged in a staggered manner.

[0008] Furthermore, a first pipe box is disposed on the right side of the heat exchange assembly, and a second pipe box is disposed on the left side of the heat exchange assembly. The outer surfaces of the first pipe box and the second pipe box are both fixedly connected with a third flange.

[0009] Furthermore, an unconverted oil input pipe is disposed at the top of the first pipe box, and an unconverted oil output pipe is disposed at the bottom of the second pipe box.

[0010] Furthermore, the first connecting member and the second connecting member are fixedly installed by bolts, and the first flange member, the second flange member and the third flange member are fixedly installed by bolts.

[0011] The beneficial effects of the utility model are:

[0012] 1. In the utility model, when the device needs to be maintained and cleaned, the bolts on the third flange are first removed to separate the third flange, the second flange and the tube sheet, and the first tube box and the second tube box are removed. Then, the bolts on the first connecting member and the second connecting member are removed to separate the upper shell and the lower shell. Then, after removing the upper shell, the heat exchange assembly is taken out upward to complete the removal of the entire heat exchanger. The completely disassembled and disassembled heat exchanger is very convenient for cleaning and maintenance, and the cleaning effect is greatly improved.

[0013] 2. In the utility model, the heat exchange component supports the heat transfer tube by arranging the baffle plate outside the heat transfer tube, thereby improving the strength of the heat exchange component. In addition, the secondary contact area of ​​the cold and hot fluids is increased by arranging the baffle plate, thereby improving the heat transfer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the practical explosion structure;

[0016] Figure 3 It is a partial structural schematic diagram of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the heat exchange component of the utility model.

[0018] In the figure: 1, lower housing, 101, middle oil inlet pipe, 102, first connecting member, 103, first flange member;

[0019] 2. upper housing, 201. middle oil output pipe, 202. second connecting piece, 203. second flange;

[0020] 3. Second pipe box, 301, unconverted oil output pipe;

[0021] 4. First pipe box, 401, unconverted oil input pipe, 402, third flange;

[0022] 5. Heat exchange assembly, 501. tube sheet, 502. baffle, 503. heat exchange tube. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in conjunction with the drawings and embodiments.

[0024] Embodiment 1

[0025] like Figure 1-Figure 4 As shown, a heat exchange device for a reaction system is characterized in that it includes a lower shell 1, both sides of the lower shell 1 are fixedly connected with first flanges 103, the front and rear outer surfaces of the lower shell 1 are fixedly connected with first connecting members 102 near the top, a middle oil input pipe 101 is arranged at the bottom of the lower shell 1 near the left edge, an upper shell 2 is arranged at the top of the lower shell 1, both sides of the upper shell 2 are fixedly connected with second flanges 203, the front and rear outer surfaces of the upper shell 2 are fixedly connected with second connecting members 202 near the bottom, a middle oil output pipe 201 is arranged at the top of the upper shell 2 near the right edge, a heat exchange component 5, the heat exchange component 5 is arranged between the inner surface walls of the lower shell 1 and the upper shell 2, the heat exchange component 5 includes two tube sheets 501, a plurality of heat transfer tubes 503 are arranged between the outer surfaces of the two tube sheets 501, a baffle 502 is arranged between the outer surfaces of the plurality of heat transfer tubes 503, the baffle 502 is arranged in a semicircular shape, and the plurality of baffles 502 are arranged in a staggered manner.

[0026] In the embodiment, the middle section oil enters the lower shell 1 and the upper shell 2 through the middle section oil input pipe 101, and the unconverted oil enters the heat transfer tube 503 through the hole on the tube plate 501 after passing through the second tube box 3 through the unconverted oil input pipe 401. At this time, the outer surface of the heat transfer tube 503 contacts the middle section oil between the upper shell 2 and the lower shell 1, thereby completing the heat exchange. Then the middle section oil flows out through the middle section oil output pipe 201, and the unconverted oil flows out through the unconverted oil output pipe 301, completing the heat exchange operation. When the device needs maintenance and cleaning, the bolts on the third flange 402 are first removed to separate the third flange 402 and the second flange 203. The first pipe box 4 and the second pipe box 3 are dismantled, and then the bolts on the first connecting piece 102 and the second connecting piece 202 are removed, which plays a role in separating the upper shell 2 and the lower shell 1. Then, after removing the upper shell 2, the heat exchange component 5 is taken out upward to complete the dismantling of the entire heat exchanger. The completely dismantled and decomposed heat exchanger is very convenient for cleaning and maintenance, and the cleaning effect is greatly improved. Sealing gaskets are arranged between the first connecting piece 102 and the second connecting piece 202, and between the first flange piece 103, the tube sheet 501 and the third flange piece 402 in the device, which plays a sealing effect and avoids the problem of liquid leakage.

[0027] Embodiment 2

[0028] like Figure 1-Figure 4 As shown, a heat exchange device for a reaction system is provided, a first pipe box 4 is provided on the right side of a heat exchange component 5, a second pipe box 3 is provided on the left side of the heat exchange component 5, the outer surfaces of the first pipe box 4 and the second pipe box 3 are fixedly connected with a third flange 402, an unconverted oil input pipe 401 is provided on the top of the first pipe box 4, an unconverted oil output pipe 301 is provided on the bottom of the second pipe box 3, a first connecting member 102 and a second connecting member 202 are fixedly installed by bolts, and the first flange 103, the second flange 203, and the third flange 402 are fixedly installed by bolts.

[0029] In the embodiment, the baffle plate 502 is provided on the outside of the heat transfer tube 503 in the heat exchange component 5 to support the heat transfer tube 503, thereby improving the strength of the heat exchange component 5. In addition, the secondary contact area between the unconverted oil and the middle oil is increased by providing the baffle plate 502, thereby improving the heat transfer effect.

[0030] Working principle: When the device is in use, the middle section oil enters the lower shell 1 and the upper shell 2 through the middle section oil input pipe 101, and the unconverted oil passes through the unconverted oil input pipe 401 and then passes through the second pipe box 3 and enters the heat transfer tube 503 from the hole on the tube plate 501. At this time, the outer surface of the heat transfer tube 503 contacts the middle section oil between the upper shell 2 and the lower shell 1, thereby completing the heat exchange. Then the middle section oil flows out through the middle section oil output pipe 201, and the unconverted oil flows out through the unconverted oil output pipe 301, completing the heat exchange operation. When the device needs maintenance and cleaning, the bolts on the third flange 402 are first removed to separate the third flange 402, the second flange 203 and the tube plate 501, completing the removal of the first tube box 4 and the second tube box 3, and then the first connecting member 102 and the third connecting member 102 are removed. The bolts on the second connecting member 202 are removed to separate the upper shell 2 and the lower shell 1. Then, the upper shell 2 is removed and the heat exchange component 5 is taken out upward to complete the removal of the entire heat exchanger. The completely disassembled heat exchanger is very convenient for cleaning and maintenance, and the cleaning effect is greatly improved. In this device, sealing gaskets are provided between the first connecting member 102 and the second connecting member 202, and between the first flange member 103 and the third flange member 402, which have a sealing effect and avoid liquid leakage. In the heat exchange component 5, a baffle 502 is provided on the outside of the heat transfer tube 503 to support the heat transfer tube 503, thereby improving the strength of the heat exchange component 5. In addition, the baffle 502 is provided to increase the secondary contact area between the unconverted oil and the middle oil, thereby improving the heat transfer effect.

Claims

1. A heat exchange device for a reaction system, characterized in that: include: A lower housing (1), wherein first flanges (103) are fixedly connected to outer surfaces on both sides of the lower housing (1); A first connecting member (102), the first connecting member (102) being fixedly connected to a position close to the top of the front and rear outer surfaces of the lower housing (1); A middle section oil input pipe (101), wherein the middle section oil input pipe (101) is arranged at the right edge of the bottom of the lower housing (1); An upper shell (2), wherein the upper shell (2) is arranged on the top of the lower shell (1); A second connecting member (202), the second connecting member (202) being fixedly connected to a position close to the bottom of the front and rear outer surfaces of the upper housing (2); A second flange (203), wherein the second flange (203) is fixedly connected to the outer surfaces of both sides of the upper housing (2), A middle section oil output pipe (201), wherein the middle section oil output pipe (201) is arranged at the left edge of the top of the upper housing (2); A heat exchange component (5), wherein the heat exchange component (5) is arranged between the inner surface wall of the lower outer shell (1) and the upper outer shell (2).

2. A heat exchange device for a reaction system according to claim 1, characterized in that: The heat exchange component (5) comprises two tube sheets (501), a plurality of heat transfer tubes (503) are arranged between the outer surfaces of the two tube sheets (501), and a baffle (502) is arranged between the outer surfaces of the plurality of heat transfer tubes (503).

3. A heat exchange device for a reaction system according to claim 2, characterized in that: The baffles (502) are arranged in a semicircular shape, and a plurality of the baffles (502) are arranged in a staggered manner.

4. A heat exchange device for a reaction system according to claim 2, characterized in that: A first pipe box (4) is arranged on the right side of the heat exchange component (5), and a second pipe box (3) is arranged on the left side of the heat exchange component (5); and the outer surfaces of the first pipe box (4) and the second pipe box (3) are both fixedly connected with a third flange (402).

5. A heat exchange device for a reaction system according to claim 4, characterized in that: An unconverted oil input pipe (401) is arranged at the top of the first pipe box (4), and an unconverted oil output pipe (301) is arranged at the bottom of the second pipe box (3).

6. A heat exchange device for a reaction system according to claim 1, characterized in that: The first connecting member (102) and the second connecting member (202) are fixedly installed by means of bolts, and the first flange member (103), the second flange member (203) and the third flange member (402) are fixedly installed by means of bolts.

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