Jacketed reaction kettle for chemical industry

Abstract

The utility model provides a chemical jacketed reaction kettle which comprises a reaction kettle body and a jacket, the jacket is arranged on the outer side of the reaction kettle body, an inlet pipe is arranged on the upper portion of the side face of the jacket, an outlet pipe is arranged at the bottom of the side face of the jacket, and an annular uniform distributor is arranged in the jacket and communicated with the inlet pipe. The annular uniform distributor surrounds the reaction kettle body, first small holes are uniformly distributed in the upper side of the annular uniform distributor, second small holes are uniformly distributed in the lower side of the annular uniform distributor, and the number of the second small holes is 2-4 times that of the first small holes. The annular distributor has the beneficial effects that the air holes are formed in the upper side and the lower side of the annular distributor, so that steam is radially and uniformly diffused when flowing through the annular cavity, and then a uniform steam curtain is formed through dense micropores in the upper layer, so that a local overheated area caused by traditional single-point steam admission is effectively eliminated, and the thermal field consistency in the reaction process is remarkably improved; and an environment with a uniform heat source is created for temperature-sensitive chemical reaction.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically a jacketed reactor for chemical applications. Background Technology

[0002] In chemical production, jacketed reactors are core equipment in temperature-sensitive unit operations. Their temperature control performance directly determines product purity, reaction efficiency, and energy consumption. However, due to inherent defects in structural design and temperature control logic, traditional jacketed reactors have long faced problems such as uneven temperature distribution, energy waste, and system complexity, urgently requiring breakthroughs through technological innovation.

[0003] Especially in reactions that require settling and separation after stirring, the uneven distribution of the introduced heat medium steam due to the prolonged stagnant material inside the reactor can cause localized overheating. In traditional jacketed reactors, steam enters directly from the bottom of the jacket, and the high-temperature steam quickly accumulates in the lower part of the jacket due to density differences, creating a localized overheated zone in the lower half of the reactor. Meanwhile, in the upper half, the heat transfer efficiency decreases after steam condensation, resulting in a temperature significantly lower than the set value. This vertical temperature difference leads to regional coking or reaction stagnation during the reaction process.

[0004] When the reaction needs to switch to the cooling stage, the refrigerant is usually injected from the top of the jacket. This counter-current flow pattern of "hot medium from bottom to top, cold medium from top to bottom" causes the hot and cold fluids to oppose each other within the jacket, further hindering the uniform diffusion of heat. Especially in rapid exothermic reactions, the refrigerant cannot cover the high-temperature area in time, leading to localized overheating and potential safety accidents. Furthermore, frequent switching between hot and cold media requires cumbersome operations involving purging residual liquid from the jacket with compressed gas, and is prone to cross-contamination risks due to valve misoperation. Utility Model Content

[0005] To address the issue of uneven distribution of the hot medium vapor, causing localized overheating, in some reactions that require settling and separation after stirring, where the material inside the reactor remains stagnant for an extended period;

[0006] This utility model provides a jacketed reactor for chemical use, including a reactor body and a jacket. The jacket is disposed on the outside of the reactor body. An inlet pipe is disposed on the upper part of the side of the jacket and an outlet pipe is disposed on the bottom. An annular distributor is disposed inside the jacket and connects to the inlet pipe. The annular distributor surrounds the reactor body and has a first small hole evenly distributed on the upper side and a second small hole evenly distributed on the lower side. The number of the second small holes is 2 to 4 times the number of the first small holes.

[0007] As a preferred embodiment, the second hole is staggered from the first hole.

[0008] As a preferred embodiment, the diameter of the second small hole is 3 to 5 mm, and the diameter of the first small hole is 1 to 3 mm.

[0009] As a preferred embodiment, the jacket sidewall is fixedly provided with multiple supports, and the annular distributor is disposed on the supports.

[0010] As a preferred embodiment, the inlet pipe is provided with a tee pipe connecting the steam inlet and the circulating water outlet respectively, and the outlet pipe is provided with a tee pipe connecting the steam outlet and the circulating water inlet respectively, so that the flow directions of the cold medium and the hot medium in the jacket layer are opposite.

[0011] As a preferred embodiment, the tee pipe is provided with a flange connection to the inlet or outlet pipe.

[0012] As a preferred embodiment, the reactor body has a stirrer inlet at the top and a material outlet at the bottom.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model opens air holes on the upper and lower sides of the annular distributor, so that the steam completes radial uniform diffusion when flowing through the annular cavity. Then, a uniform steam curtain is formed through the dense micropores in the upper layer, which effectively eliminates the local overheating zone caused by traditional single-point steam inlet, significantly improves the thermal field consistency of the reaction process, and creates a uniform heat source environment for temperature-sensitive chemical reactions.

[0015] 2. In this invention, the hot medium steam is evenly distributed at the top and flows vertically downward, while the cold medium circulating cooling water is forcibly transported upward from the bottom. This flow method maintains a high temperature difference driving force, greatly increases the effective heat exchange per unit time, significantly reduces the consumption of medium, and achieves a step-by-step leap in overall energy utilization efficiency. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partially enlarged schematic diagram of the present invention.

[0019] The numbers in the attached diagram are:

[0020] 1. Reactor body; 2. Jacket; 3. Inlet pipe; 4. Outlet pipe; 5. Annular distributor; 51. First small hole; 52. Second small hole; 6. Support; 7. Agitator port; 8. Material outlet. Detailed Implementation

[0021] To illustrate the features of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further explain this utility model.

[0022] Example:

[0023] Please see Figures 1 to 2 This utility model provides a jacketed reactor for chemical applications with enhanced heat transfer efficiency. Its structure includes a cylindrical reactor body 1 and a jacket 2 coaxially sleeved around it. The top of the jacket 2 is connected to a steam inlet and a circulating water outlet via flanges, and the bottom is connected to a steam outlet and a circulating water inlet via flanges, enabling reverse flow of hot and cold media. Two stainless steel supports 6 are welded circumferentially to the inner wall of the jacket 2, supporting an annular distributor 5. The distributor's inner diameter is flush with the outer wall of the reactor body 1, and its outer diameter is 50mm from the inner wall of the jacket 2. The annular distributor 5 has 10 first small holes 51 with a diameter of 2mm on its upper side and 30 second small holes 52 with a diameter of 4mm distributed at a staggered angle on its lower side, forming a gradient distribution of hole density and hole diameter ratio. A stirrer port 7 is provided at the top of the reactor body 1 to install a frame-type stirrer, and a material outlet 8 is provided at the bottom conical head to be equipped with a pneumatic bottom valve.

[0024] During operation, in the exothermic reaction stage: high-temperature steam is input from the steam inlet at the top of the jacket 2 at a pressure of 0.8MPa. 30% of the steam volume is vertically sprayed onto the upper wall of the reactor body 1 through the first small hole 51 on the upper side of the annular distributor 5. At the same time, 70% of the steam volume is swept at high speed through the second small hole 52 on the lower side to flush the middle and lower wall. The condensate is collected and discharged from the bottom steam outlet. When switching to the endothermic reaction, 5℃ circulating cold water is injected in reverse from the bottom circulating water inlet. The water flow forms a vortex below the annular distributor 5 and rises slowly, prolonging the heat exchange time.

[0025] In this embodiment, air holes are opened on the upper and lower sides of the annular distributor, so that the steam can complete radial uniform diffusion when flowing through the annular cavity. Then, a uniform steam curtain is formed through the dense micropores in the upper layer, which effectively eliminates the local overheating zone caused by traditional single-point steam inlet, significantly improves the thermal field consistency of the reaction process, and creates a uniform heat source environment for temperature-sensitive chemical reactions.

[0026] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A jacketed reactor for chemical applications, comprising a reactor body (1) and a jacket (2), wherein the jacket (2) is disposed outside the reactor body (1), and an inlet pipe (3) is disposed on the upper part of the side of the jacket (2) and an outlet pipe (4) is disposed on the bottom, characterized in that: The jacket (2) is provided with an annular distributor (5) connected to the inlet pipe (3). The annular distributor (5) surrounds the reactor body (1) and has a first small hole (51) evenly distributed on the upper side and a second small hole (52) evenly distributed on the lower side. The number of the second small holes (52) is 2 to 4 times the number of the first small holes (51).

2. The jacketed reactor for chemical applications according to claim 1, characterized in that: The second small hole (52) is misaligned with the first small hole (51).

3. The jacketed reactor for chemical applications according to claim 1, characterized in that: The second small hole (52) has a diameter of 3 to 5 mm, and the first small hole (51) has a diameter of 1 to 3 mm.

4. A jacketed reactor for chemical applications according to claim 1, characterized in that: Multiple supports (6) are fixedly installed on the side wall of the jacket (2), and the annular distributor (5) is installed on the supports (6).

5. A jacketed reactor for chemical applications according to claim 1, characterized in that: The inlet pipe (3) is equipped with a three-way pipe to connect the steam inlet and the circulating water outlet respectively, and the outlet pipe (4) is equipped with a three-way pipe to connect the steam outlet and the circulating water inlet respectively, so that the flow direction of the cold medium and the hot medium in the jacket layer is opposite.

6. A jacketed reactor for chemical applications according to claim 5, characterized in that: The tee pipe is provided with a flange connection to the inlet pipe (3) or the outlet pipe (4).

7. A jacketed reactor for chemical applications according to claim 1, characterized in that: The reactor body (1) has a stirrer port (7) at the top and a material outlet (8) at the bottom.

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