Organic reaction kettle capable of automatically controlling temperature
By introducing reactor coils, coolant storage tanks, and variable frequency pumps into the organic reactor, combined with spray and circulating variable frequency pumps, automatic temperature control of the reactor is achieved, solving the problem of rapid temperature rise during the reaction of ethylene and bromine, and ensuring production safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-03-27
AI Technical Summary
In existing organic reactors, the rapid reaction rate of ethylene with bromine to produce 1,2-dibromoethane leads to a rapid increase in temperature, which may cause increased bromine volatilization, affecting yield and posing safety hazards.
The reactor uses a combination of a reactor coil, a coolant storage tank, and a coolant variable frequency pump. The temperature is controlled by high-level and low-level liquid outlet pipes. Combined with a circulating variable frequency pump and a spray plate for cooling, the system uses a temperature detector and a PLC controller to adjust the coolant and ethylene feed valves to achieve automatic temperature control.
Effectively controlling the temperature inside the reactor avoids safety hazards, improves production efficiency, and ensures safety.
Smart Images
Figure CN224040894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to organic reaction kettle technical field, concretely is automatic temperature control's organic reaction kettle. BACKGROUND
[0002] Ethylene reacts with bromine to generate 1,2-dibromoethane, which is an important intermediate for preparing various organic compounds when used as an organic synthesis raw material, and can be used for synthesizing drugs, spices, pesticides and the like. As a solvent, 1,2-dibromoethane is a good organic solvent that can dissolve various organic compounds. It can be used for dissolving oil, resin, rubber and the like, and has certain application in the paint, ink and the like industries.
[0003] When producing 1,2-dibromoethane through the organic reaction kettle, the existing device only performs cooling treatment on the reaction kettle through the temperature control sleeve outside the reaction kettle. Although the reaction can be performed at normal temperature and pressure, the reaction speed is relatively fast, and a certain amount of heat will be released. If the ethylene feeding speed is too fast, the reaction will be too violent, which may cause the solution temperature to rise rapidly, resulting in intensified bromine evaporation, affecting the reaction yield, and causing environmental pollution and safety hazards. SUMMARY
[0004] According to the deficiencies in the above prior art, the utility model aims to provide an automatic temperature control organic reaction kettle. Through the cooperation of the reaction kettle coil pipe, the cooling liquid storage tank and the cooling liquid frequency conversion pump, under normal circumstances, the high liquid outlet pipeline is used to discharge liquid to control the temperature of the reaction kettle. When the temperature rises rapidly, the low liquid outlet pipeline is used to discharge liquid, and the power of the cooling liquid frequency conversion pump is increased to rapidly cool down, thereby avoiding safety hazards. Through the cooperation of the circulating frequency conversion pump and the spraying disc, when the reaction kettle heats up rapidly, part of the liquid phase is circulated and sprayed through the spraying disc, so that the evaporated bromine is cooled down and returned to the reaction system again, thereby improving the production efficiency. Through the cooperation of the temperature detector and the PLC controller, when the temperature rises, the power of the cooling liquid frequency conversion pump frequency converter and the circulating frequency conversion pump frequency converter is increased, and the opening degree of the ethylene feeding control valve is controlled, thereby greatly reducing the temperature in the reaction kettle and ensuring production safety.
[0005] The utility model is implemented by adopting the following technical solutions:
[0006] The automatic temperature control organic reaction kettle comprises a reaction kettle, a preheating tank and a PLC controller, the preheating tank is connected with the reaction kettle through an ethylene feeding control valve, a reaction kettle coil pipe is arranged in the reaction kettle, the outlet of the reaction kettle coil pipe is connected with a cooling liquid storage tank through the preheating tank, the cooling liquid storage tank is connected with the inlet of the reaction kettle coil pipe through a cooling liquid frequency conversion pump, a cooling liquid frequency conversion pump frequency converter is arranged on the cooling liquid frequency conversion pump, a temperature detector is arranged at the bottom of the reaction kettle, the temperature detector is connected with the PLC controller, and the PLC controller is connected with the cooling liquid frequency conversion pump frequency converter.
[0007] The reaction kettle is internally provided with a stirring paddle driven by a stirring motor, and the reaction kettle coil pipe is located outside the stirring paddle.
[0008] A dispersion disc is arranged below the stirring paddle, the dispersion disc is connected with the ethylene feeding control valve, and a dispersion gas outlet is arranged on the dispersion disc.
[0009] The reaction kettle is internally provided with a spraying disc, the spraying disc is located above the reaction kettle coil pipe, and the reaction kettle is connected with the spraying disc through a circulating frequency conversion pump.
[0010] The circulating frequency conversion pump is connected with a circulating frequency conversion pump frequency converter, the circulating frequency conversion pump frequency converter is connected with the PLC controller, and the reaction kettle is connected with a feeding pump.
[0011] The preheating tank and the cooling liquid storage tank are connected through a refrigerator, and the preheating tank and the refrigerator are connected through an out-preheating tank pipeline.
[0012] The bottom of the cooling liquid storage tank is connected with the cooling liquid frequency conversion pump through a low-position liquid outlet pipeline, and the cooling liquid storage tank is connected with the low-position liquid outlet pipeline through a high-position liquid outlet pipeline.
[0013] The connecting position of the high-position liquid outlet pipeline and the cooling liquid storage tank is located on the upward 2 / 3-3 / 5 vertical wall of the bottom surface of the cooling liquid storage tank. In the case that the power of the refrigerator is unchanged, the cooling liquid storage tank can always store part of the cooling liquid for standby.
[0014] The inside of the preheating tank is provided with a preheating tank coil pipe, the preheating tank coil pipe is connected with an ethylene gas inlet pipeline, the preheating tank coil pipe is connected with the ethylene feeding control valve, and the cooling liquid frequency conversion pump is connected with the reaction kettle coil pipe through an inlet reaction kettle coil pipe pipeline.
[0015] The cooling liquid with a temperature increased in the reaction kettle coil pipe is used for heating ethylene through the preheating tank, so that the production efficiency is improved.
[0016] The bromine-containing liquid phase enters a reaction kettle through a feed pump, a stirring motor drives a stirring paddle to start rotating, ethylene enters a dispersion disc through a preheating tank and an ethylene feed control valve, and then reacts with bromine in the reaction kettle; when the temperature detector temperature rises sharply, the cooling liquid storage tank discharges liquid through the low liquid outlet pipeline, the control circulating variable frequency pump starts to work, the feed rate is reduced through the ethylene feed control valve, and the reaction temperature is reduced.
[0017] Compared with the prior art, the automatic temperature control organic reaction kettle has the following beneficial effects:
[0018] The automatic temperature control organic reaction kettle has the following beneficial effects: under normal circumstances, the high liquid outlet pipeline discharges liquid to control the temperature of the reaction kettle, when the temperature rises rapidly, the low liquid outlet pipeline discharges liquid to increase the power of the cooling liquid variable frequency pump to rapidly cool down, and the safety hazard is avoided; when the reaction kettle rapidly heats up, the circulating variable frequency pump and the spraying disc are used in cooperation to circulate part of the liquid phase, spray out through the spraying disc, make the volatilized bromine cool down again and return to the reaction system, and the production efficiency is improved; when the temperature rises, the temperature detector and the PLC controller are used in cooperation to control the power of the cooling liquid variable frequency pump and the circulating variable frequency pump, and the opening of the ethylene feed control valve is controlled, so that the temperature in the reaction kettle is greatly reduced, and the production safety is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a structure schematic view of the automatic temperature control organic reaction kettle of the utility model;
[0020] Figure 2 It is a structure schematic view of the dispersion disc of the utility model;
[0021] In the drawing: 1, reaction kettle; 2, cooling liquid storage tank; 3, refrigeration machine; 4, preheating tank; 5, stirring motor; 6, stirring paddle; 7, dispersion disc; 8, spraying disc; 9, feed pump; 10, PLC controller; 11, cooling liquid variable frequency pump; 12, circulating variable frequency pump; 13, cooling liquid variable frequency pump frequency converter; 14, circulating variable frequency pump frequency converter; 15, reaction kettle coil pipe; 16, temperature detector; 17, ethylene gas inlet pipeline; 18, preheating tank coil pipe; 19, ethylene feed control valve; 20, high liquid outlet pipeline; 21, low liquid outlet pipeline; 22, preheating tank inlet pipeline; 23, preheating tank outlet pipeline; 24, reaction kettle coil pipe inlet pipeline; 25, dispersion gas outlet. DETAILED DESCRIPTION
[0022] In order to make the utility model purposes, technical schemes more clearly, below, combining with the drawings, make further detailed description to the utility model.
[0023] Embodiment 1
[0024] As Figure 1 shown, the automatic temperature control organic reaction kettle, including reaction kettle 1, preheating tank 4, PLC controller 10, preheating tank 4 is connected with reaction kettle 1 through ethylene feed control valve 19, reaction kettle 1 inside is equipped with reaction kettle coil pipe 15, and the outlet of reaction kettle coil pipe 15 is connected with cooling liquid storage tank 2 through preheating tank 4, and cooling liquid storage tank 2 is connected with the inlet of reaction kettle coil pipe 15 through cooling liquid frequency conversion pump 11, and cooling liquid frequency conversion pump 11 is equipped with cooling liquid frequency conversion pump frequency converter 13, and the bottom of reaction kettle 1 is equipped with temperature detector 16, and temperature detector 16 is connected with PLC controller 10, and PLC controller 10 is connected with cooling liquid frequency conversion pump frequency converter 13.Reaction kettle 1 inside is equipped with stirring paddle 6 driven by stirring motor 5, and reaction kettle coil pipe 15 is located at the outside of stirring paddle 6.As Figure 2 shown, the lower portion of stirring paddle 6 is equipped with dispersion disc 7, and dispersion disc 7 is connected with ethylene feed control valve 19, and dispersion disc 7 is equipped with dispersion outlet 25.Gas outlet is arranged upwards.Reaction kettle 1 inside is equipped with spray disc 8, and spray disc 8 is located above reaction kettle coil pipe 15, and reaction kettle 1 is connected with spray disc 8 through circulating frequency conversion pump 12.Circulating frequency conversion pump 12 is connected with circulating frequency conversion pump frequency converter 14, and circulating frequency conversion pump frequency converter 14 is connected with PLC controller 10, and reaction kettle 1 is connected with feed pump 9.Reaction kettle coil pipe 15 and preheating tank 4 are equipped with preheating tank pipeline 22, and preheating tank 4 and cooling liquid storage tank 2 are equipped with refrigerating machine 3, and preheating tank 4 and refrigerating machine 3 are equipped with out preheating tank pipeline 23.Cooling liquid storage tank 2 bottom is connected with cooling liquid frequency conversion pump 11 through low-level liquid outlet pipeline 21, and cooling liquid storage tank 2 is connected with low-level liquid outlet pipeline 21 through high-level liquid outlet pipeline 20.The connection of high-level liquid outlet pipeline 20 and cooling liquid storage tank 2 is located on the vertical wall of the upper 2 / 3 of the bottom surface of cooling liquid storage tank 2.The inside of preheating tank 4 is equipped with preheating tank coil pipe 18, and preheating tank coil pipe 18 is connected with ethylene gas inlet pipeline 17, and preheating tank coil pipe 18 is connected with ethylene feed control valve 19, and cooling liquid frequency conversion pump 11 is connected with reaction kettle coil pipe 15 through preheating tank pipeline 24.
[0025] The above-mentioned automatic temperature control organic reaction kettle, when working, includes the following steps:
[0026] (1) The bromine-containing liquid phase enters the reaction kettle 1 through the feed pump 9, the stirring motor 5 drives the stirring paddle 6 to start rotating, ethylene enters the dispersion disc 7 through the preheating tank 4 and the ethylene feed control valve 19, and then reacts with bromine in the reaction kettle 1; (2) When the temperature detector 16 detects a sudden temperature rise, the cooling liquid variable frequency pump 11 power is raised through the PLC controller 10, the cooling liquid storage tank 2 discharges through the low-level liquid outlet pipeline 21, the control circulating variable frequency pump 12 starts to work, and the feed rate is reduced by controlling the ethylene feed control valve 19, which is used to reduce the reaction temperature.
Claims
1. An automatic temperature-controlled organic reaction kettle, characterized in that, The utility model relates to a kind of reaction kettle, which comprises reaction kettle (1), preheating tank (4), PLC controller (10), preheating tank (4) is connected with reaction kettle (1) by ethylene feed control valve (19), reaction kettle (1) is equipped with reaction kettle coil pipe (15) inside, reaction kettle coil pipe (15) outlet is connected with cooling liquid storage tank (2) by preheating tank (4), cooling liquid storage tank (2) is connected with the inlet of reaction kettle coil pipe (15) by cooling liquid frequency conversion pump (11), cooling liquid frequency conversion pump (11) is equipped with cooling liquid frequency conversion pump frequency converter (13), the bottom of reaction kettle (1) is equipped with temperature detector (16), temperature detector (16) is connected with PLC controller (10), and PLC controller (10) is connected with cooling liquid frequency conversion pump frequency converter (13); The reaction kettle (1) is equipped with a spraying disc (8) inside, and the spraying disc (8) is located above the reaction kettle coil pipe (15). The reaction kettle (1) is connected with a feed pump (9).
2. The temperature-controlled organic reaction kettle of claim 1, wherein, The reaction kettle (1) is equipped with a stirring paddle (6) driven by a stirring motor (5), and the reaction kettle coil pipe (15) is located outside the stirring paddle (6).
3. The temperature-controlled organic reaction kettle of claim 2, wherein, The stirring paddle (6) is equipped with a dispersion disc (7) below, and the dispersion disc (7) is connected with the ethylene feed control valve (19).
4. The temperature-controlled organic reaction kettle of claim 1, wherein, The reaction kettle coil pipe (15) and the preheating tank (4) are equipped with an inlet preheating tank pipeline (22) therebetween, the preheating tank (4) and the cooling liquid storage tank (2) are equipped with a refrigerator (3) therebetween, and the preheating tank (4) and the refrigerator (3) are equipped with an outlet preheating tank pipeline (23) therebetween.
5. The temperature-controlled organic reaction kettle of claim 1, wherein, The cooling liquid storage tank (2) is connected with the cooling liquid frequency conversion pump (11) by a low-position liquid outlet pipeline (21) at the bottom, and the cooling liquid storage tank (2) is connected with the low-position liquid outlet pipeline (21) by a high-position liquid outlet pipeline (20).
6. The temperature-controlled organic reaction kettle of claim 5, wherein, The high-position liquid outlet pipeline (20) is connected with the cooling liquid storage tank (2) at a position located on a vertical wall upwardly by 2 / 3-3 / 5 of the bottom surface of the cooling liquid storage tank (2).
7. The temperature-controlled, automated organic reaction kettle of claim 1, wherein, The preheating tank (4) is equipped with a preheating tank coil pipe (18) inside, the preheating tank coil pipe (18) is connected with an ethylene gas inlet pipeline (17), the preheating tank coil pipe (18) is connected with the ethylene feed control valve (19), and the cooling liquid frequency conversion pump (11) is connected with the reaction kettle coil pipe (15) by an inlet reaction kettle coil pipe pipeline (24).