Built-in tubular heat exchanger of esterification reaction kettle
By building a shell-and-tube heat exchanger into the esterification reactor and combining it with a stirring blade design, the problems of insufficient heating area and low heat transfer efficiency in traditional esterification reactors are solved, achieving more uniform heating and higher heat transfer efficiency, and improving the production capacity and efficiency of the reactor.
Patent Information
- Application Number
- CN202422937364.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-29
AI Technical Summary
When traditional esterification reactors are heated by coil heat exchangers, the heating area is insufficient and the heat transfer efficiency is low, which limits the reactor's production capacity and reaction efficiency.
A shell-and-tube heat exchanger is placed at the bottom of the esterification reactor, and combined with stirring blades to squeeze the material downward, and then flow back to the top through the shell-and-tube heat exchanger, so that the heating method is more uniform; baffles are set in the heat exchanger to extend the contact area between the heat transfer medium and the material, and mirror heat exchange tubes made of stainless steel or titanium alloy are used to reduce flow resistance.
It improves the heating effect and uniformity of the material, ensures that the heated material quickly enters the interlayer, avoids heat being absorbed by new material, and enhances the heat transfer efficiency and the production capacity of the reactor.
Smart Images
Figure CN223417254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of esterification reaction kettle, specifically relates to a built-in column tube type heat exchanger of esterification reaction kettle. BACKGROUND
[0002] In chemical production, esterification reaction is one of the key steps, and its efficiency directly affects the quality and production cost of products. The traditional esterification reaction kettle usually adopts coil heating mode, but this mode has problems of insufficient heating area and low heat transfer efficiency, which limits the production capacity and reaction efficiency of the reaction kettle. In addition, the coil type heat exchanger also has inconvenience in manufacturing, transportation and maintenance. INVENTION CONTENTS
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a built-in column tube type heat exchanger of esterification reaction kettle, which is used to solve the technical problems of insufficient heating area and low heat transfer efficiency of the esterification reaction kettle in the prior art.
[0004] The technical scheme for solving the above technical problem is as follows: a built-in column tube type heat exchanger of esterification reaction kettle, comprising:
[0005] The column tube type heat exchanger is arranged inside and below the esterification reaction kettle, and the column tube type heat exchanger is fixedly connected with the inner wall of the esterification reaction kettle;
[0006] The column tube type heat exchanger is provided with a low-level inlet and a high-level outlet on the side surface;
[0007] The upper tube plate and the lower tube plate of the column tube type heat exchanger are annular, and the stirring paddle of the esterification reaction kettle is arranged in the middle part of the column tube type heat exchanger.
[0008] The utility model places the column tube type heat exchanger inside and below the esterification reaction kettle, and combines the stirring paddle to extrude the material downward, and then the material is returned to the upper part of the esterification reaction kettle through the column tube type heat exchanger. Compared with the traditional coil heating, this heating mode has better and more uniform heating effect on the material.
[0009] Further, baffles are arranged between the heat exchange tubes of the column tube type heat exchanger.
[0010] The beneficial effects of the utility model are as follows: the baffles make the heat conducting medium in the column tube type heat exchanger have a spiral upward movement track, which can prolong the contact area (not direct contact) of the heat conducting medium and the material for heat exchange, and improve the heating effect.
[0011] Furthermore, an inner tube is provided above the shell-and-tube heat exchanger, a notch is provided on the wall of the inner tube, a sealing plate is provided on one side of the notch, and the sealing plate connects the outer side of the wall of the inner tube and the inner wall of the esterification reactor.
[0012] The beneficial effect of adopting this step is that under the action of the stirring blades, the material in the middle of the esterification reactor will be squeezed into the ring center of the shell and tube heat exchanger. After the backflow material comes out of the shell and tube heat exchanger, it rises along the wall of the inner tube until the notch enters the interlayer between the inner tube and the esterification reactor.
[0013] Furthermore: the material of the heat exchange tube is stainless steel or titanium alloy, and the inner wall of the heat exchange tube is a mirror surface.
[0014] The beneficial effects of this step are: stainless steel or titanium alloy materials are corrosion-resistant, wear-resistant, and have good thermal conductivity. The mirror surface can reduce the flow resistance of the heat-conducting medium and keep the interior clean.
[0015] Furthermore: a plurality of support blocks are provided between the esterification reaction kettle and the inner cylinder.
[0016] The beneficial effect of adopting this step is that the support block can strengthen the installation strength of the inner tube and prevent the inner tube from deforming and causing the interlayer to become thinner.
[0017] The beneficial effects of the utility model are:
[0018] 1. The shell and tube heat exchanger is placed inside the esterification reactor, which has a larger contact area with the material than the coil heat exchanger, and the heat exchange of the material is more uniform;
[0019] 2. Combined with the inner cylinder, the heated material can enter the interlayer as quickly as possible to avoid excessive mixing with the material in the center, and to ensure that the heat of the heated material is not excessively absorbed by the newly added material. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is a vertical cross-sectional view of a shell-and-tube heat exchanger built into an esterification reactor provided by the utility model;
[0022] Figure 2 This is a transverse cross-sectional view of a shell-and-tube heat exchanger built into an esterification reaction kettle provided by the utility model;
[0023] Figure 3 This is a structural diagram of the inner cylinder of a shell-and-tube heat exchanger built into an esterification reaction kettle provided by the utility model;
[0024] Figure 4 The utility model provides a schematic diagram of the top view of the inner cylinder of a shell-and-tube heat exchanger built into an esterification reaction kettle.
[0025] Figure 1 and Figure 4 The dotted line with an arrow in the figure represents the flow path of the materials in the esterification reactor.
[0026] Reference numerals:
[0027] 1-esterification reactor; 2-shell-and-tube heat exchanger; 3-inner cylinder; 4-stirring blade;
[0028] 11-discharge flange; 21-low-position inlet; 22-high-position outlet; 23-heat exchange tube; 24-baffle; 31-slot; 32-sealing plate; 33-support block. DETAILED DESCRIPTION
[0029] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.
[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.
[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0032] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.
[0033] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0035] Example
[0036] like Figures 1 to 4 As shown, the utility model provides an esterification reaction kettle with a built-in shell and tube heat exchanger, comprising:
[0037] a shell-and-tube heat exchanger 2, the shell-and-tube heat exchanger 2 being placed below the interior of the esterification reaction kettle 1 and fixedly connected to the inner wall of the esterification reaction kettle 1;
[0038] The side of the shell and tube heat exchanger 2 is provided with a low-position inlet 21 and a high-position outlet 22;
[0039] The upper tube sheet and the lower tube sheet of the shell-and-tube heat exchanger 2 are both annular, and the stirring blade 4 of the esterification reaction kettle 1 is arranged in the middle of the shell-and-tube heat exchanger 2 .
[0040] The upper tube plate and the lower tube plate of the shell-and-tube heat exchanger 2 are provided with a plurality of through holes, in which heat exchange tubes 23 are arranged. Figure 1 The dot-dash line in FIG. 2 represents the center line of the heat exchange tube 23 , and the excessive heat exchange tubes 23 are not drawn in the figure.
[0041] The utility model places the shell and tube heat exchanger 2 at the bottom of the esterification reactor 1, and combines the stirring blade 4 to squeeze the material downward, and then flows back to the top of the esterification reactor 1 through the shell and tube heat exchanger 2. Compared with the traditional coil heating, this heating method has a better and more uniform heating effect on the material; the specific flow path of the material is referred to Figure 1 and Figure 4 A dotted line with an arrow.
[0042] On the basis of the above technical solutions, the heat exchange tubes 23 of the column tube heat exchanger 2 are provided with baffles 24.
[0043] The baffle 24 makes the heat conducting medium in the column tube heat exchanger 2 have a spiral upward movement track, which can prolong the contact area (non-direct contact) of the heat conducting medium and the material, and can improve the heating effect.
[0044] On the basis of the above technical solutions, the column tube heat exchanger 2 is provided with an inner cylinder 3, the cylinder wall of the inner cylinder 3 is provided with a slot 31, one side of the slot 31 is provided with a sealing plate 32, the sealing plate 32 is connected to the outer side of the cylinder wall of the inner cylinder 3 and the inner wall of the esterification reactor 1, so that the material entering the interlayer (between the esterification reactor 1 and the inner cylinder 2) from the slot 31 can only rotate once along the outer circumferential surface of the inner cylinder 3, and then flow out from the discharge flange 11 of the reactor wall of the esterification reactor 1.
[0045] Under the action of the stirring paddle 4, the material in the middle is extruded to the ring center of the column tube heat exchanger 2, and the backflow material rises along the cylinder wall of the inner cylinder 3 after coming out of the column tube heat exchanger 2, and enters the interlayer between the inner cylinder 3 and the esterification reactor 1 until the slot 31.
[0046] On the basis of the above technical solutions, the material of the heat exchange tube 23 is stainless steel or titanium alloy, and the inner wall of the heat exchange tube 23 is a mirror surface.
[0047] The material of stainless steel or titanium alloy is corrosion-resistant, wear-resistant, and has good heat conduction performance, and the mirror surface can reduce the flow resistance of the heat conducting medium and will not retain the heat conducting medium, so that the inside is kept clean and the heat conducting medium can participate in the heat conduction cycle completely.
[0048] On the basis of the above technical solutions, a plurality of support blocks 33 are arranged between the esterification reactor 1 and the inner cylinder 3.
[0049] The support block 33 can strengthen the installation strength of the inner cylinder 3, avoid deformation of the inner cylinder 3, and cause the interlayer to be thinned, and can ensure that the interlayer has enough space for the heated material to be stored and circulated.
[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An esterification reactor with a built-in shell and tube heat exchanger, characterized in that: include: a shell-and-tube heat exchanger, the shell-and-tube heat exchanger being placed below the interior of the esterification reaction kettle and fixedly connected to the inner wall of the esterification reaction kettle; The side of the shell and tube heat exchanger is provided with a low-position inlet and a high-position outlet; The upper tube plate and the lower tube plate of the shell-and-tube heat exchanger are both annular, and the stirring blades of the esterification reaction kettle are arranged in the middle of the shell-and-tube heat exchanger.
2. The esterification reaction kettle according to claim 1 is equipped with a shell and tube heat exchanger, characterized in that: Baffles are provided between the heat exchange tubes of the shell-and-tube heat exchanger.
3. The esterification reaction kettle according to claim 1 is equipped with a shell and tube heat exchanger, characterized in that: An inner tube is provided above the shell-and-tube heat exchanger, a notch is provided on the wall of the inner tube, a sealing plate is provided on one side of the notch, and the sealing plate connects the outer side of the wall of the inner tube and the inner wall of the esterification reactor.
4. The esterification reaction kettle according to claim 1 is equipped with a shell and tube heat exchanger, characterized in that: The heat exchange tubes of the shell-and-tube heat exchanger are made of stainless steel or titanium alloy, and the inner walls of the heat exchange tubes of the shell-and-tube heat exchanger are mirror-finished.
5. The esterification reaction kettle according to claim 3 is equipped with a shell and tube heat exchanger, characterized in that: A plurality of supporting blocks are provided between the esterification reaction kettle and the inner cylinder.