Anti-coking distillation reaction kettle with in-line circulating cooling jacket

Abstract

The utility model discloses a prevent coking distillation reation kettle of taking in -line circulation cooling jacket, relate to chemical equipment technical field. The utility model discloses a reation kettle body, install the combination cooling jacket of reation kettle body outside to the pipeline subassembly of setting in the reation kettle body top, the reation kettle body includes the kettle body, the end cover of the locking bolt sealing installation in the kettle body top to the heating jacket of setting in the kettle body bottom outer ring, the combination cooling jacket includes the upper jacket and lower jacket of setting around the kettle body, and the exchange pipe of intercommunication has between upper jacket and lower jacket, the pipeline subassembly includes the main pipeline of intercommunication installation in the end cover top to the liquid feed pipe and the steam exhaust pipe of intercommunication installation in the main pipeline periphery side. The utility model discloses in -line circulation cooling jacket adopts the parallel flow circulation arrangement of upper jacket and lower jacket cooperation multiple circumferential distribution exchange pipe, makes the cooling medium in the kettle body upper portion and form even, efficient annular flow path, improves the heat exchange area and heat transfer efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, and in particular relates to an anti-coking distillation reactor with an internal circulation cooling jacket. Background Technology

[0002] In the chemical, pharmaceutical, and fine chemical industries, distillation reactors are common heat treatment equipment widely used in material separation, purification, and reaction processes. However, during high-temperature distillation, especially when processing high-boiling-point, heat-sensitive, or easily polymerizable materials, the inner wall of the reactor, particularly near the heating zone, is prone to coking, caking, or even carbonization of the material due to localized excessively high temperatures or uneven heat distribution. This not only reduces product yield and purity but also decreases equipment heat transfer efficiency, makes cleaning difficult, and in severe cases, can even lead to blockages, corrosion, or safety accidents.

[0003] Traditional distillation reactors are typically equipped only with bottom or full-enclosure heating jackets, lacking the ability to differentiate the temperature of different areas of the reactor. Although some improved equipment has added external cooling devices, they mostly use single-channel, non-circulating or local spraying methods, which have problems such as low cooling efficiency, lag in temperature response, and high medium consumption, making it difficult to achieve effective temperature gradient control of the gas phase rising path during distillation.

[0004] To address this issue, we provide a coking-resistant distillation reactor with an internal circulation cooling jacket. Utility Model Content

[0005] The purpose of this invention is to provide a coking-resistant distillation reactor with an internal circulation cooling jacket. By setting a closed internal circulation cooling system consisting of an upper jacket, a lower jacket, and multiple circumferentially distributed exchange pipes in the upper part of the reactor body, and working in conjunction with the bottom heating jacket, a controllable axial temperature gradient is formed, thereby effectively avoiding the problems of coking, coking, or thermal decomposition caused by the material remaining in the high-temperature area for a long time.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to an anti-coking distillation reactor with an internal circulation cooling jacket, comprising a reactor body, a combined cooling jacket installed outside the reactor body, and a pipeline assembly disposed on the top of the reactor body; the reactor body includes a vessel body, an end cap sealed and installed on the top of the vessel body by locking bolts, a heating jacket disposed on the outer ring of the bottom of the vessel body, and support feet fixed to the outside of the heating jacket; the combined cooling jacket includes an upper jacket and a lower jacket disposed around the vessel body, and an exchange pipe connecting the upper jacket and the lower jacket; the pipeline assembly includes a main pipeline connected to the top of the end cap, and a liquid feed pipe and a steam discharge pipe connected to the periphery of the main pipeline.

[0007] The present invention is further configured such that a plurality of instruments are mounted on the top of the end cap, and the sensing end of each instrument extends into the interior of the vessel body.

[0008] The present invention is further configured such that the liquid feed pipe is equipped with a liquid control valve and the steam discharge pipe is equipped with a steam discharge valve.

[0009] The present invention is further configured such that the upper jacket is connected to an inlet pipe, the lower jacket is connected to an outlet pipe, and the inlet pipe and the outlet pipe are connected to a circulating water tank via an external pipeline.

[0010] The present invention is further configured such that multiple exchange pipes are arranged at equal intervals along the circumference of the vessel body, with one end connected to the lower side wall of the upper jacket and the other end connected to the upper side wall of the lower jacket, forming a multi-channel parallel cooling medium flow path.

[0011] The present invention is further configured such that there are multiple locking bolts, which are evenly distributed along the circumference of the end cover. Each locking bolt passes through the flange hole on the edge of the end cover and is threadedly engaged with the flange on the top of the vessel body, thereby realizing a detachable and sealed connection between the end cover and the vessel body.

[0012] The present invention is further configured such that the heating jacket, the upper jacket, and the lower jacket are all annular cavity structures, and the three are coaxially sleeved on the outer wall of the vessel.

[0013] This utility model has the following beneficial effects: 1. The combined cooling jacket in this utility model adopts an upper and lower jacket with multiple circumferentially distributed exchange pipes in parallel flow arrangement, so that the cooling medium forms a uniform and efficient annular flow path in the upper part of the vessel, which greatly improves the heat exchange area and heat transfer efficiency, effectively suppresses local overheating, and fundamentally reduces the coking, coking or decomposition caused by the retention of materials in high temperature areas. It is especially suitable for the fine distillation of heat-sensitive, high-boiling-point or easily polymerizable materials.

[0014] 2. The cooling system of this utility model adopts a closed internal circulation structure. The inlet pipe and outlet pipe are connected to an external circulating water tank, which not only realizes the reuse of the cooling medium and reduces energy consumption and operating costs, but also facilitates flexible adjustment of cooling intensity according to process requirements, and improves the response speed and accuracy of temperature control. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of a coking-resistant distillation reactor with an internal circulation cooling jacket.

[0017] Figure 2This is an overall side view of an anti-coking distillation reactor with an internal circulation cooling jacket.

[0018] Figure 3 This is an overall top view of an anti-coking distillation reactor with an internal circulation cooling jacket.

[0019] Figure 4 This is a front view of the overall structure of an anti-coking distillation reactor with an internal circulation cooling jacket.

[0020] The attached diagram lists the components represented by each number as follows: 1. Reactor body; 11. Reactor body; 12. End cap; 13. Heating jacket; 14. Support legs; 15. Locking bolts; 2. Combined cooling jacket; 21. Upper jacket; 22. Lower jacket; 23. Exchange pipe; 24. Liquid inlet pipe; 25. Liquid outlet pipe; 3. Piping assembly; 31. Main pipeline; 32. Liquid feed pipe; 32a. Liquid control valve; 33. Steam exhaust pipe; 33a. Steam exhaust valve; 4. Instruments. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0022] Please see Figure 1-4 This utility model relates to an anti-coking distillation reactor with an internal circulation cooling jacket, comprising a reactor body 1, a combined cooling jacket 2 installed outside the reactor body 1, and a pipeline assembly 3 disposed on the top of the reactor body 1; the reactor body 1 includes a vessel body 11, an end cap 12 sealed and installed on the top of the vessel body 11 by locking bolts 15, a heating jacket 13 disposed on the outer ring of the bottom of the vessel body 11, and a support leg 14 fixed to the outside of the heating jacket 13; the combined cooling jacket 2 includes an upper jacket 21 and a lower jacket 22 disposed around the vessel body 11, and an exchange pipe 23 connecting the upper jacket 21 and the lower jacket 22; the pipeline assembly 3 includes a main pipeline 31 connected to the top of the end cap 12, and a liquid feed pipe 32 and a steam discharge pipe 33 connected to the periphery of the main pipeline 31.

[0023] This embodiment effectively solves the problem of easy coking of materials during high-temperature reaction by constructing a distillation reactor that integrates internal circulation cooling and external heating dual temperature control mechanisms. This reactor precisely controls the temperature gradient in the reaction zone: a heating jacket 13 is installed at the bottom of the reactor body 11 to provide the heat energy required for distillation; simultaneously, a combined cooling jacket 2, consisting of an upper jacket 21, a lower jacket 22, and multiple circumferentially distributed exchange pipes 23, is arranged around the upper part of the reactor body 11, forming a closed-loop internal cooling circuit; after the cooling medium enters the upper jacket 21 through the inlet pipe 24, it is diverted to the lower jacket 22 through multiple parallel exchange pipes 23, and then returns to the external circulating water tank through the outlet pipe 25. This not only enhances the uniformity of the cooling medium flow within the jacket, but also significantly improves the heat exchange efficiency, preventing local overheating that could lead to material decomposition or coking; the top piping assembly 3 integrates feeding and steam discharge functions and is equipped with an independent control valve to ensure operational flexibility and process safety; the overall structure, through the spatial separation and functional synergy of the heating and cooling zones, ensures distillation efficiency while minimizing the occurrence of coking side reactions.

[0024] Specifically, the upper jacket 21 is connected to the liquid inlet pipe 24, and the lower jacket 22 is connected to the liquid outlet pipe 25. The liquid inlet pipe 24 and the liquid outlet pipe 25 are connected to the circulating water tank via external pipelines. Multiple exchange pipes 23 are provided and are arranged at equal intervals around the circumference of the vessel body 11. One end of each pipe is connected to the lower side wall of the upper jacket 21, and the other end is connected to the upper side wall of the lower jacket 22, forming a multi-channel parallel cooling medium flow path.

[0025] Furthermore, there are multiple locking bolts 15, evenly distributed around the circumference of the end cover 12. Each locking bolt 15 passes through the flange hole on the edge of the end cover 12 and is threaded into the top flange of the vessel body 11, realizing a detachable sealed connection between the end cover 12 and the vessel body 11, which facilitates maintenance and cleaning. Multiple instruments 4 are installed on the top of the end cover 12, and the sensing end of each instrument 4 extends into the interior of the vessel body 11. The multiple built-in instruments 4 can monitor key parameters inside the vessel in real time, providing data support for precise temperature control. The liquid feed pipe 32 is equipped with a liquid control valve 32a, and the steam discharge pipe 33 is equipped with a steam discharge valve 33a. The heating jacket 13, the upper jacket 21, and the lower jacket 22 are all annular cavity structures, and the three are coaxially sleeved on the outer wall of the vessel body 11.

[0026] The operation process of this embodiment is as follows: First, the reactor body 11 is fixed on the support leg 14, and an annular heating jacket 13 is installed on its bottom outer ring for subsequent introduction of heat transfer oil or electric heating medium to provide the heat required for distillation; then, a combined cooling jacket 2 is installed on the upper outer wall of the reactor body 11. This jacket consists of an upper jacket 21 located above and a lower jacket 22 located below. The two are connected vertically by multiple exchange pipes 23 arranged equidistantly along the circumference, forming a multi-channel parallel cooling circuit around the reactor body 11; next, the liquid inlet pipe 24 is connected to the side wall of the upper jacket 21, and the liquid outlet pipe 25 is connected to the side wall of the lower jacket 22. The two are connected to the same circulating water tank through external pipelines to form a closed internal circulation system, ensuring that the cooling medium can flow continuously and evenly through the entire combined cooling jacket 2; then, the end cap 12 is placed on the top of the reactor body 11, and multiple locking bolts 15 evenly distributed along the flange edge are screwed into the reactor body 11. The top has a threaded hole to achieve a detachable sealed connection between the end cap 12 and the vessel body 11. A main pipeline 31 is installed on the top of the end cap 12, and a liquid feed pipe 32 with a liquid control valve 32a and a steam discharge pipe 33 with a steam discharge valve 33a are respectively connected to its periphery to control the material input and gas phase product output respectively. At the same time, multiple process instruments 4 are integrated on the end cap 12, and their sensor probes extend into the vessel to monitor key parameters such as temperature, pressure or liquid level in real time. When the equipment is started, the heating jacket 13 is turned on first to raise the temperature to the set distillation temperature. At the same time, according to the material characteristics and reaction process, the cooling circulation system is started in time to make the cooling medium flow in the combined jacket to accurately cool the upper part of the vessel body 11, thereby forming a reasonable temperature gradient from high temperature to low temperature from bottom to top in the vessel, effectively preventing high boiling point components from staying in the high temperature zone for a long time and causing coking, and finally achieving efficient, stable and coking-proof continuous distillation operation.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A coking-resistant distillation reactor with an internal circulation cooling jacket, comprising a reactor body (1), a combined cooling jacket (2) installed outside the reactor body (1), and a pipeline assembly (3) disposed on the top of the reactor body (1); characterized in that: The reactor body (1) includes a reactor body (11), an end cap (12) sealed and installed on the top of the reactor body (11) by locking bolts (15), a heating jacket (13) disposed on the outer ring of the bottom of the reactor body (11), and a support foot (14) fixed to the outside of the heating jacket (13); the combined cooling jacket (2) includes an upper jacket (21) and a lower jacket (22) disposed around the reactor body (11), and an exchange pipe (23) is connected between the upper jacket (21) and the lower jacket (22); the pipeline assembly (3) includes a main pipeline (31) connected to the top of the end cap (12), and a liquid feed pipe (32) and a steam discharge pipe (33) connected to the periphery of the main pipeline (31).

2. The anti-coking distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, Multiple instruments (4) are mounted on the top of the end cap (12), and the sensing end of each instrument (4) extends into the interior of the vessel body (11).

3. The anti-coking distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, The liquid feed pipe (32) is equipped with a liquid control valve (32a), and the steam discharge pipe (33) is equipped with a steam discharge valve (33a).

4. The anti-coking distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, The upper jacket (21) is connected to the inlet pipe (24), and the lower jacket (22) is connected to the outlet pipe (25). The inlet pipe (24) and the outlet pipe (25) are connected to the circulating water tank via external pipelines.

5. A coking-resistant distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, The exchange pipe (23) is provided in multiple ways and is arranged at equal intervals around the circumference of the vessel body (11). One end of the pipe is connected to the lower side wall of the upper jacket (21) and the other end is connected to the upper side wall of the lower jacket (22), forming a multi-channel parallel cooling medium flow path.

6. The anti-coking distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, The locking bolts (15) are multiple and evenly distributed around the end cover (12). Each locking bolt (15) passes through the flange hole on the edge of the end cover (12) and is threaded into the top flange of the vessel body (11) to achieve a detachable sealed connection between the end cover (12) and the vessel body (11).

7. A coking-resistant distillation reactor with an internal circulation cooling jacket according to claim 1, characterized in that, The heating jacket (13), upper jacket (21) and lower jacket (22) are all annular cavity structures, and the three are coaxially sleeved on the outer wall of the vessel body (11).

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