Mixed reaction device of shell-and-tube heat exchanger tube box

Abstract

The utility model discloses a mixed reaction device of a shell-and-tube heat exchanger tube box, which belongs to the technical field of chemical heat exchange equipment and comprises a tank horizontally mounted on the side of the heat exchanger tube box, and a gas-phase material inlet tube and a liquid-phase material inlet tube are mounted on the side wall of the tank. Two baffle plates, two perforated baffle plates and a buffer baffle plate are arranged in the tank body, the two baffle plates are positioned between the two perforated baffle plates, and the buffer baffle plate is mounted on one side close to the heat exchanger tube box. According to the mixed reaction device of the tube box of the shell-and-tube heat exchanger, two or more strands of materials enter the tank body through the baffle plate, the perforated baffle plate and the buffer baffle plate which are specially designed in the tank body, are fully mixed and then are fully reacted through the baffle plate, the perforated baffle plate and the buffer baffle plate; and then entering the shell side of the heat exchanger to exchange heat with a shell pass cold (hot) medium, so that a series of problems such as tube bundle pull-off, tube bundle thinning, non-uniform mixing and incomplete conversion are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chemical heat exchange equipment technical field especially relates to a mixed reaction device of shell and tube heat exchanger tube box. BACKGROUND

[0002] In the field of chemical and material processing, reaction and heat exchange of materials are two important process links. At present, the reaction and heat exchange of materials are mostly carried out in two different equipment devices, and multiple equipment devices can increase the comprehensive cost of equipment and personnel and consume more, but the same equipment device can cause the following problems:

[0003] 1. First, if the heat released in the reaction process is not properly controlled, it can be too intense, causing thermal shock to downstream equipment, leading to equipment expansion, damage to welded areas, and even serious problems such as pipe bundle shedding;

[0004] 2. Secondly, the strong reaction heat flushing effect can accelerate the wear of the heat exchanger tube bundle, shortening the service life of the equipment;

[0005] 3. Finally, if the reaction materials cannot be uniformly mixed in a single equipment, it will directly affect the conversion rate of the reaction, causing part of the materials to fail to participate in the reaction effectively, thereby reducing the overall process efficiency and resource utilization.

[0006] Therefore, we propose a mixed reaction device of shell and tube heat exchanger tube box to solve the above problems. INVENTION CONTENTS

[0007] The utility model aims at solving the above problems, and proposes a mixed reaction device of shell and tube heat exchanger tube box.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A mixed reaction device of shell and tube heat exchanger tube box, comprising a tank body horizontally installed on the side of the heat exchanger tube box, the tank body side wall is provided with a gas phase material inlet pipe and a liquid phase material inlet pipe, and the tank body is provided with two baffles, two perforated baffles and a buffer baffle, the two baffles are located between the two perforated baffles, and the buffer baffle is installed on the side close to the heat exchanger tube box; The tank body is provided with a gas-liquid mixing structure, the installation position of the gas-liquid mixing structure corresponds to the gas phase material inlet pipe and the liquid phase material inlet pipe, the gas-liquid mixing structure is driven by the density difference of the gas phase material and the liquid phase material, and is used for initial mixing with the gas phase material and the liquid phase material.

[0010] Further, the gas-liquid mixing structure comprises two annular plates arranged in parallel, the two annular plates are connected through a plurality of equidistantly distributed connecting shafts, the connecting shafts are rotationally connected with the annular plates, arc-shaped plates are fixedly arranged on the connecting shafts, the arc-shaped plates are attached to the annular plates, and a deflection limiting mechanism is arranged between the movable ends of the arc-shaped plates and the annular plates.

[0011] Further, the deflection limiting mechanism comprises a limiting shaft fixedly arranged at the movable end of the arc-shaped plate, a limiting groove is formed in the annular plate, the limiting shaft is located in the limiting groove, and the limiting groove is arc-shaped with the axis of the connecting shaft as the center.

[0012] Further, the gas-phase material inlet pipe is installed below the tank body, the liquid-phase material inlet pipe is installed above the tank body, and the gas-phase material inlet pipe and the liquid-phase material inlet pipe are both vertically installed along the tangent direction of the tank body.

[0013] Further, the baffle plates are provided in an up-down staggered manner through the baffle openings between the baffle plates and the inner wall of the tank body.

[0014] Further, the edge of the perforated baffle plate is fixed to the inner wall of the tank body, and a plurality of small holes with a distribution of sparseness in the upper portion and denseness in the lower portion are formed in the perforated baffle plate.

[0015] Further, the buffer baffle plate is installed on the lower side in the tank body, an overflow opening is formed above the buffer baffle plate, and a plurality of overflow holes are uniformly formed in the buffer baffle plate.

[0016] The utility model has the following beneficial technical effects:

[0017] The mixing reaction device of the shell-and-tube heat exchanger tube box is provided with special baffle plates, perforated baffle plates and buffer baffle plates in the tank body, two or more materials enter the tank body, are fully mixed, and then are fully reacted through the baffle plates, the perforated baffle plates and the buffer baffle plates, and then enter the shell side of the heat exchanger to exchange heat with the shell-side cold (hot) medium, the mixing reaction device is arranged on the tube side of the heat exchanger, the reaction device is built-in in the tube box, the reaction and heat exchange are organically combined together, the material mixing is more sufficient, the reaction time is increased, and then the conversion rate and the reaction effect are improved, and a series of problems such as tube bundle pull-out, tube bundle thinning, uneven mixing and incomplete conversion are solved.

[0018] The utility model is provided with a plurality of small holes with a distribution of sparseness in the upper portion and denseness in the lower portion on the perforated baffle plate, one-time mixing is carried out, heat balance and material balance are achieved, and the adverse effects of thermal reaction on tube plate welding and tube bundle pull-out are solved.

[0019] The two baffles are arranged as first lower and then upper, which is beneficial to full reaction of the material, the liquid-phase material flows from lower to upper through the first baffle and continues to mix and react with the gas-phase material flowing out of the second baffle, the mixed material and new material for reaction reach the lower part along the second baffle, and through the turbulence effect of the two baffles, secondary mixing is carried out, the reaction intensity can be reduced, the average reaction rate is achieved, and the reaction is moderate and orderly.

[0020] The overflow port is formed above the buffer baffle, and overflow holes are evenly arranged on the buffer baffle, so that the material passing through the buffer baffle can avoid directly washing the heat exchange tube, and part of the material flows to the upper side, so that the material is relatively uniformly passed through the tube plate into the shell side for heat exchange.

[0021] The mixed reaction device of the shell-and-tube heat exchanger tube box is provided with a gas-liquid mixing structure, the density difference between the gas-phase material and the liquid-phase material is used as power, so that the input gas-phase material and liquid-phase material are preliminarily and efficiently mixed, the reaction time is increased, and the conversion rate and reaction effect are improved, and the passive driving mode can effectively save equipment expenditure, and the structure is simple and the maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a whole structure schematic view of the utility model.

[0023] Fig. 2 It is an internal structure schematic view of the utility model.

[0024] Fig. 3 It is a sectional structure schematic view of the utility model.

[0025] Fig. 4 It is a structure schematic view of the gas-liquid mixing structure in the utility model.

[0026] Fig. 5 It is a working principle structure schematic view of the gas-liquid mixing structure in the utility model.

[0027] Fig. 6 It is a structure schematic view of the arc-shaped plate in the utility model.

[0028] The meanings of the reference signs are as follows: 1. tank body; 11. gas-phase material inlet pipe; 12. liquid-phase material inlet pipe; 13. side liquid-phase material connecting pipe; 2. baffle; 3. perforated baffle; 31. small hole; 4. buffer baffle; 41. overflow hole; 5. gas-liquid mixing structure; 51. annular plate; 52. connecting shaft; 53. arc-shaped plate; 54. limiting shaft; 55. limiting groove; 6. safety valve; 7. liquid outlet. DETAILED DESCRIPTION

[0029] The technical scheme of the utility model will be described clearly and completely in connection with the drawings.

[0030] As Figs. 1-3 A mixed reaction device of a tube box of a shell-and-tube heat exchanger, comprising a tank body 1 horizontally installed at the side of the tube box of the heat exchanger, and a gas-phase material inlet pipe 11 and a liquid-phase material inlet pipe 12 are installed on the side wall of the tank body 1.

[0031] As Figs. 1-3 The gas-phase material inlet pipe 11 is installed below the tank body 1, the liquid-phase material inlet pipe 12 is installed above the tank body 1, and the gas-phase material inlet pipe 11 and the liquid-phase material inlet pipe 12 are both installed vertically along the tangent direction of the tank body 1, because the density of the liquid-phase material is much greater than that of the gas-phase material, the liquid-phase material moves downward and the gas-phase material moves upward, so that the gas-phase material enters from below and the liquid-phase material enters from above, and a side liquid-phase material connecting pipe 13 is arranged at the end of the tank body 1, the side liquid-phase material connecting pipe 13 causes the liquid-phase material to enter the tank body 1 by a certain amount of impact, thereby causing a local vacuum, which is more conducive to mixing.

[0032] Two baffle plates 2, two perforated baffles 3 and a buffer baffle 4 are arranged in the tank body 1, the two baffle plates 2 are located between the two perforated baffles 3, the edges of the perforated baffles 3 are fixed to the inner wall of the tank body 1, and the buffer baffle 4 is installed on the side close to the tube box of the heat exchanger, after the material enters, it is first mixed by the first perforated baffle 3a, then the mixed material passes through the two baffle plates 2, and the material is mixed again by the turbulence of the two baffle plates 2, so that the reaction intensity is reduced and the average reaction rate is improved, then the material passes through the second perforated baffle 3 again, the second perforated baffle 3b is also a whole piece, the small holes 31 on the second perforated baffle 3b are also distributed in a sparse upper and dense lower manner, the main purpose is to mix the material for the third time, so that the unreacted material is fully reacted, the conversion rate is further improved, the material is fully converted, and finally the material passes through the buffer baffle 4, and can avoid the material passing through the buffer baffle 4 directly washing the heat exchange tube, and part of the material flows around to the upper side, so that the material passes through the tube plate and enters the shell side to exchange heat more uniformly.

[0033] In order to ensure the safe operation of the reaction, the temperature difference of two or more materials cannot be too large, otherwise a large amount of heat will be generated, which will threaten the safe operation of the equipment, and the equipment is provided with a safety valve 6 and a liquid discharge port 7 to ensure the safe and stable operation of the equipment.

[0034] As Figs. 4-6 A gas-liquid mixing structure 5 is arranged in the tank body 1, the installation position of the gas-liquid mixing structure 5 corresponds to the gas-phase material inlet pipe 11 and the liquid-phase material inlet pipe 12, the gas-liquid mixing structure 5 is driven by the density difference between the gas-phase material and the liquid-phase material, and is used for initial mixing of the gas-phase material and the liquid-phase material.

[0035] As Figs. 4-6, the gas-liquid mixing structure 5 includes two annular plates 51 arranged in parallel, the two annular plates 51 are connected through a plurality of equidistantly distributed connecting shafts 52, the connecting shaft 52 is rotationally connected with the annular plate 51, an arc-shaped plate 53 is fixedly arranged on the connecting shaft 52, the arc-shaped plate 53 can form a coaxial state with the annular plate 51, in the coaxial state, the arc-shaped plate 53 is close to the inner wall of the tank body 1, the arc-shaped plate 53 is attached to the annular plate 51, the arc-shaped plate 53 can be deflected, so that the arc-shaped plate 53 and the two annular plates 51 form a cavity, and a deflection limiting mechanism is arranged between the movable end of the arc-shaped plate 53 and the annular plate 51, under the action of the deflection limiting mechanism, the deflection range of the arc-shaped plate 53 is limited to not more than the annular plate 51, the arc-shaped plate 53 located on the upper side is deflected downward to a limit position under the action of gravity, forming a cavity, when liquid material is input, the liquid material inlet pipe 12 moves along the tangent direction of the tank body 1 downward, enters the cavity, and causes impact on the arc-shaped plate 53, at the same time, the downward pressure of the liquid material on the arc-shaped plate 53 in the cavity makes the annular plate 51 start to rotate, the liquid material covers the arc-shaped plate 53 located on the lower side, the gas-phase material inlet pipe 11 is arranged at the center symmetric position of the liquid material inlet pipe 12, after the gas-phase material enters, bubbles are generated in the liquid material, and under the action of the bubble buoyancy, the arc-shaped plate 53 is deflected upward to overcome the gravity, and the action force direction of the liquid material on the annular plate 51 is consistent, so that the annular plate 51 is continuously driven to rotate, the preliminary efficient mixing of the gas-phase material and the liquid material is promoted, the reaction time is increased, and then the conversion rate and the reaction effect are improved, and the passive driving mode can effectively save equipment expenditure, the structure is simple, and the maintenance cost is low.

[0036] The annular plate 51 close to the opening baffle 3 is provided with a flow discharge port, so that the gas-phase material and the liquid material are discharged from the cavity, and the material cannot exist in the cavity for a long time and cannot be discharged.

[0037] The deflection limiting mechanism includes a limiting shaft 54 fixedly arranged at the movable end of the arc-shaped plate 53, a limiting groove 55 is formed in the annular plate 51, the limiting shaft 54 is located in the limiting groove 55, and the limiting groove 55 is in the shape of an arc with the axis of the connecting shaft 52 as the center, the limiting shaft 54 slides in the limiting groove 55, and stops when reaching the limit position of the limiting groove 55, and the position is the limit position of the deflection of the arc-shaped plate 53.

[0038] The working principle of the utility model is as follows:

[0039] In use, the gas-phase material enters through the gas-phase material inlet pipe 11, and the liquid-phase material enters through the liquid-phase material inlet pipe 12. The arc-shaped plate 53 located at the top deflects downward to the limit position under the action of gravity, forming a cavity. When the liquid-phase material enters, it moves downward along the tangent direction of the tank 1 through the liquid-phase material inlet pipe 12 into the cavity, and impacts the arc-shaped plate 53. At the same time, the downward pressure of the liquid material on the arc-shaped plate 53 in the cavity causes the annular plate 51 to start rotating. The liquid material covers the arc-shaped plate 53 located at the bottom. The gas-phase material inlet pipe 11 is arranged at the center symmetric position of the liquid-phase material inlet pipe 12. After the gas-phase material enters, it generates bubbles in the liquid-phase material and is pushed by the buoyancy of the bubbles to deflect upward against gravity. The direction of the force of the liquid-phase material on the annular plate 51 is consistent with the direction of the force of the gas-phase material, driving the annular plate 51 to rotate continuously, promoting the initial efficient mixing of the gas-phase and liquid-phase materials.

[0040] After the material enters, it first passes through the first perforated baffle 3a, and is mixed for the first time through the small holes 31 in the perforated baffle 3a, achieving thermal equilibrium and material balance. Subsequently, the mixed material passes through two baffles 2. The liquid-phase material flows from bottom to top through the first baffle 2a and continues to mix with the gas-phase material flowing out of the second baffle 2b. The mixed material and the newly reacted material reach the lower part along the second baffle 2b. Through the turbulent action of the two baffles 2, the material is mixed for the second time, which can reduce the degree of reaction, average the reaction rate, and make the reaction mild and orderly. Subsequently, the material passes through the second perforated baffle 3 again, mainly for the third mixing, so that the unreacted material can fully react, further improving the conversion rate and making the material conversion complete. Finally, the material passes through the buffer baffle 4. Through the overflow hole 41, the material passing through the buffer baffle 4 can avoid directly washing the heat exchange pipe, and part of the material flows around to the upper side, so that the material passes through the tube plate to the shell side for heat exchange more uniformly.

Claims

1. A mixed reactor device for a shell-and-tube heat exchanger tube box, comprising a tank body (1) horizontally mounted on the side of the heat exchanger tube box, characterized in that: The tank body (1) is provided with a gas-phase material inlet pipe (11) and a liquid-phase material inlet pipe (12), and is provided with two baffles (2), two perforated baffles (3) and a buffer baffle (4) inside, the two baffles (2) are located between the two perforated baffles (3), and the buffer baffle (4) is installed on the side close to the heat exchanger tube box; the tank body (1) is provided with a gas-liquid mixing structure (5) corresponding to the installation positions of the gas-phase material inlet pipe (11) and the liquid-phase material inlet pipe (12), and the gas-liquid mixing structure (5) is used for initial mixing of the gas-phase material and the liquid-phase material.

2. A mixed reactor for a tube sheet heat exchanger tube side according to claim 1, characterized in that: The baffle (2) and the inner wall of the tank body (1) are provided with a baffle opening.

3. A mixed reaction apparatus for a tube sheet heat exchanger tube side according to claim 2, characterized in that: The edge of the perforated baffle (3) is fixed to the inner wall of the tank body (1), and a plurality of small holes (31) with sparse upper and dense lower are formed in the perforated baffle (3).

4. A shell-and-tube heat exchanger tube side mixing reactor according to claim 3, characterized in that: The buffer baffle (4) is installed on the lower side of the tank body (1), and an overflow opening is formed above the buffer baffle (4), and a plurality of uniformly distributed overflow holes (41) are formed in the buffer baffle (4).

5. A mixed reactor for a tube sheet heat exchanger tube side according to claim 1 or 4, characterized in that: The gas-liquid mixing structure (5) comprises two parallel annular plates (51), the two annular plates (51) are connected by a plurality of equidistant connecting shafts (52), the connecting shaft (52) is rotatably connected with the annular plate (51), an arc-shaped plate (53) is fixedly arranged on the connecting shaft (52), the arc-shaped plate (53) is attached to the annular plate (51), and a deflection limiting mechanism is arranged between the movable end of the arc-shaped plate (53) and the annular plate (51).

6. A mixed reaction apparatus for a tube sheet heat exchanger tube side according to claim 5, characterized in that: The deflection limiting mechanism comprises a limiting shaft (54) fixedly arranged on the movable end of the arc-shaped plate (53), a limiting groove (55) is formed in the annular plate (51), the limiting shaft (54) is located in the limiting groove (55), and the limiting groove (55) is in the form of an arc with the axis of the connecting shaft (52) as the center.

7. A mixed reactor for a tube sheet heat exchanger as defined in claim 1, wherein: The gas-phase material inlet pipe (11) is installed below the tank body (1), the liquid-phase material inlet pipe (12) is installed above the tank body (1), and the gas-phase material inlet pipe (11) and the liquid-phase material inlet pipe (12) are both installed vertically along the tangent direction of the tank body (1).

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