Pyridine chlorobromate production temperature control equipment

Abstract

The utility model discloses pyridine chlorobromate production temperature control equipment which comprises a reaction kettle main body and a heating pipe, a heat conduction sleeve is arranged between the heating pipe and the reaction kettle main body, a temperature adjusting jacket is arranged on the outer side of the heating pipe, and a refrigerant channel and a heat insulation cavity are arranged in the temperature adjusting jacket. A refrigerant inlet and a refrigerant outlet which are communicated with the refrigerant channel are formed in the outer end face of the temperature adjusting jacket, the heat conduction sleeve is fixedly installed on the outer end face of the reaction kettle body, a first positioning groove is formed in the outer end face of the heat conduction sleeve, the heating pipe is installed in the first positioning groove, and a second positioning groove corresponding to the first positioning groove is formed in the inner end face of the temperature adjusting jacket. And heat exchange sheets are arranged in the heating pipes. The spiral copper pipe is adopted as the heating pipe, and is in close contact with the heat conduction sleeve and the temperature adjusting jacket through the semicircular spiral notches, so that the contact area is increased, the heat conduction efficiency is improved, and the design is beneficial to improving the temperature rise rate of materials.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to temperature control equipment for producing pyridine chlorobromide. Background Art

[0002] Pyridine chlorobromide is an organic salt compound, which is formed by the combination of pyridine molecules and chlorobromate ions. The production process of pyridine chlorobromide includes halogenation reaction, neutralization reaction and crystal precipitation. Before the reaction starts, the reactor may need to be heated to the predetermined starting reaction temperature to ensure that all materials are in liquid state and can be quickly mixed evenly. Once the reaction temperature is reached, the system will maintain a constant temperature to ensure that the halogenation reaction is carried out under optimal conditions. During this period, it may be necessary to continuously monitor the temperature and fine-tune the heating medium input to cope with the reaction exotherm or ambient temperature changes. After the reaction is completed, the reaction mixture may need to be gradually cooled to precipitate pyridine chlorobromide crystals.

[0003] In the prior art, there is only a heat medium pipeline on the outside of the reactor. When the temperature reaches the optimum reaction temperature, the heat medium is stopped from being introduced, and the residual temperature of the heat medium in the pipeline will continue to heat the reactor, resulting in an excessively high temperature of the reactor. In addition, the contact area between the heat medium and the reactor is too small, resulting in a certain delay in the heating and cooling of the materials in the reactor, thereby causing temperature overshoot and control lag, affecting product quality and production efficiency. Therefore, a temperature control device for the production of pyridine chlorobromide is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a temperature control device for the production of pyridine chlorobromide, which has the advantages of sensitive temperature control reaction, energy saving and environmental protection, and solves the problem in the prior art that the contact area between the reactor and the heat medium is too small, resulting in too delayed heating and cooling of the reactor, which affects the product quality and production efficiency.

[0005] To achieve the above object, the utility model provides the following technical solution: a temperature control device for the production of pyridine chlorobromide, comprising a reactor body and a heating tube, a heat-conducting sleeve is arranged between the heating tube and the reactor body, and a temperature-adjusting jacket is arranged on the outside of the heating tube;

[0006] A refrigerant channel and an insulating cavity are provided in the temperature regulating jacket, a refrigerant inlet and a refrigerant outlet which are connected with the refrigerant channel are provided on the outer end surface of the temperature regulating jacket, the heat conducting sleeve is fixedly installed on the outer end surface of the reactor body, a first positioning groove is provided on the outer end surface of the heat conducting sleeve, the heating tube is installed in the first positioning groove, a second positioning groove corresponding to the first positioning groove is provided on the inner end surface of the temperature regulating jacket, a heat exchange plate is provided in the heating tube, a heat medium inlet is provided at the bottom of the heating tube, and a heat medium outlet is provided at the top of the heating tube.

[0007] As a preferred embodiment of the temperature control equipment for producing pyridine chlorobromide of the utility model, the heating tube is a spiral copper tube, the first positioning groove and the second positioning groove are semicircular spiral grooves, and the radius of the first positioning groove and the second positioning groove is equal to the outer diameter of the heating tube.

[0008] As a preferred embodiment of the temperature control equipment for producing pyridine chlorobromide of the utility model, the refrigerant channel is a spiral circular channel, and the diameter ratio of the refrigerant channel to the heating tube is 1:5.

[0009] As a preferred embodiment of the temperature control device for producing pyridine chlorobromide of the utility model, the heat-insulating cavity is two groups of spiral cavities, and the heat-insulating cavity is located at the upper and lower sides of the refrigerant channel.

[0010] As a preferred embodiment of the temperature control equipment for producing pyridine chlorobromide of the utility model, the temperature regulating jacket is composed of three groups of temperature regulating plates spliced ​​together, and adjacent temperature regulating plates are fixedly connected by bolts.

[0011] As a preferred embodiment of the temperature control equipment for producing pyridine chlorobromide of the utility model, a sealing strip is provided on the side of the temperature regulating plate.

[0012] As a preferred embodiment of the temperature control device for producing pyridine chlorobromide of the utility model, the heat exchange plate is a rectangular thin plate of a plurality of rotating shaft arrays.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The heating tube of the utility model adopts a spiral copper tube, and is in close contact with the heat-conducting sleeve and the temperature-adjusting jacket through a semicircular spiral groove, which increases the contact area and improves the heat conduction efficiency. This design helps to increase the heating rate of the material and achieve uniform heating of the reactor body through the heat-conducting sleeve, avoiding uneven heating of the material and affecting the product quality.

[0015] 2. The utility model sets a spiral refrigerant channel and two sets of spiral insulation chambers in the temperature regulating jacket. When the equipment reaches the set temperature, the refrigerant can be introduced through the refrigerant channel to cool the heating tube to prevent the residual heat from causing the temperature of the equipment to continue to rise. The refrigerant channel has a small diameter, which is conducive to accurately controlling the refrigerant flow rate and avoiding a sudden drop in temperature due to excessive cooling efficiency. When there is no refrigerant in the refrigerant channel, it forms an insulation chamber with the insulation chamber to enhance the thermal insulation effect of the heat medium, reduce heat loss, and improve the environmental protection performance of the equipment.

[0016] 3. The utility model increases the heat exchange area between the heat medium and the heating tube by arranging a plurality of circular array heat exchange plates in the heating tube, significantly improves the heating rate of the reactor, reduces the hysteresis time of temperature change, and improves the temperature control sensitivity.

[0017] 4. The temperature regulating jacket of the utility model is a modular design composed of three groups of temperature regulating plates. Adjacent temperature regulating plates are fixedly connected by bolts, which is convenient for installation, disassembly and maintenance, reduces the production cost and installation difficulty of the equipment, and improves the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is an exploded view of the matching state of the heat-conducting sleeve, the heating tube and the temperature-adjusting jacket of the utility model;

[0020] Figure 3 This is a front cross-sectional view of the heating tube of the utility model;

[0021] Figure 4 This is a front cross-sectional view of the temperature regulating jacket of the utility model;

[0022] Figure 5 For the utility model Figure 4 Enlarged view of point A in the middle.

[0023] In the figure: 1. Reactor body; 2. Heating tube; 201. Heat medium inlet; 202. Heat medium outlet; 203. Heat exchange plate; 3. Heat transfer sleeve; 301. First positioning groove; 4. Temperature control jacket; 401. Second positioning groove; 402. Refrigerant channel; 403. Insulation cavity; 404. Sealing strip; 410. Temperature control plate; 411. Refrigerant outlet; 412. Refrigerant inlet. DETAILED DESCRIPTION

[0024] See also Figure 1-Figure 5 A temperature control device for producing pyridine chlorobromide comprises a reactor body 1 and a heating tube 2, a heat-conducting sleeve 3 is arranged between the heating tube 2 and the reactor body 1, and a temperature-adjusting jacket 4 is arranged on the outer side of the heating tube 2;

[0025] A refrigerant channel 402 and an insulating cavity 403 are provided in the temperature regulating jacket 4, and a refrigerant inlet 412 and a refrigerant outlet 411 which are connected with the refrigerant channel 402 are provided on the outer end surface of the temperature regulating jacket 4. The heat conducting sleeve 3 is fixedly installed on the outer end surface of the reactor body 1, and a first positioning groove 301 is provided on the outer end surface of the heat conducting sleeve 3. The heating tube 2 is installed in the first positioning groove 301, and a second positioning groove 401 corresponding to the first positioning groove 301 is provided on the inner end surface of the temperature regulating jacket 4. A heat exchange plate 203 is provided in the heating tube 2, a heat medium inlet 201 is provided at the bottom of the heating tube 2, and a heat medium outlet 202 is provided at the top of the heating tube 2.

[0026] Furthermore, the heating tube 2 is a spiral copper tube, the first positioning groove 301 and the second positioning groove 401 are semicircular spiral grooves, and the radius of the first positioning groove 301 and the second positioning groove 401 is equal to the outer diameter of the heating tube 2 .

[0027] The heating tube 2 is in full contact with the heat-conducting sleeve 3, thereby greatly increasing the contact area between the heating tube 2 and the heat-conducting sleeve 3. The reactor body 1 is heated by the heat-conducting sleeve 3, which not only improves the heating rate of the material, but also the structure of the heat-conducting sleeve 3 further improves the uniformity of heating, thereby avoiding uneven heating of the material affecting the product quality.

[0028] Furthermore, the refrigerant channel 402 is a spiral circular channel, and the diameter ratio of the refrigerant channel 402 to the heating tube 2 is 1:5.

[0029] When the equipment reaches the expected temperature, refrigerant is introduced into the refrigerant channel 402, so that the refrigerant in the refrigerant channel 402 cools the heating tube 2, avoiding the residual temperature in the heating tube 2 causing the equipment temperature to continue to rise. The thinner refrigerant channel 402 can adjust the temperature more accurately, avoiding the refrigerant cooling efficiency being too high and causing the equipment temperature to drop suddenly.

[0030] Furthermore, the heat-insulating cavity 403 is two groups of spiral cavities, and the heat-insulating cavity 403 is located at the upper and lower sides of the refrigerant channel 402 .

[0031] When there is no refrigerant in the refrigerant channel 402 , the refrigerant channel 402 and the heat-insulating cavity 403 form a heat-insulating cavity 403 , thereby improving the heat preservation effect of the heat medium in the heating tube 2 , reducing heat loss and improving the environmental protection performance of the equipment.

[0032] Furthermore, the temperature regulating jacket 4 is composed of three groups of temperature regulating plates 410, and adjacent temperature regulating plates 410 are fixedly connected by bolts.

[0033] The spliced ​​installation structure facilitates the installation and maintenance of the temperature regulating jacket 4, reduces the production cost and installation difficulty of the equipment, and improves the convenience of maintenance.

[0034] Furthermore, a sealing strip 404 is provided on the side of the temperature regulating plate 410 .

[0035] The sealing strip 404 improves the sealing between adjacent temperature regulating plates 410 to prevent refrigerant leakage.

[0036] Furthermore, the heat exchange fins 203 are rectangular thin sheets in a circular array.

[0037] The heat exchange area between the heat medium and the heating tube 2 is increased by the heat exchange plate 203, thereby greatly improving the heating rate of the reactor, reducing the hysteresis time of the temperature change of the equipment, and improving the sensitivity of the temperature control.

[0038] When the device is in use, a preset type and amount of heat medium such as hot water, steam, etc. is injected into the heating tube 2 through the heat medium inlet 201. The heat medium flows through the heat exchange plate 203 in the heating tube 2 to heat the reactor, so that the material in the reactor body 1 is gradually heated to the target reaction temperature, and then the pyridine chlorobromate raw material is added to the reactor body 1 for halogenation reaction. The large contact area between the heat-conducting sleeve 3 and the heating tube 2 and the presence of the heat exchange plate 203 enable the heat to be efficiently transferred to the reactor body 1, achieving rapid and uniform heating. If there is In case of temperature overshoot, the refrigerant channel 402 can be activated, and a cooling medium such as cooling water can be injected through the refrigerant inlet 412, which circulates in the temperature regulating jacket 4 to absorb the residual heat of the heating tube 2 and prevent the temperature of the reactor body 1 from being too high. After the production is completed, if the material needs to be cooled quickly, the refrigerant flow rate can be increased, and the heating tube 2 can be quickly cooled through the refrigerant channel 402. At the same time, the insulation cavity 403 plays an insulating role at this time, reducing the heat loss of the heat medium and improving the cooling efficiency. In combination with the temperature monitoring technology in the prior art, the rapid temperature control of the reactor can be achieved.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control device for producing pyridine chlorobromide, comprising a reaction kettle body (1) and a heating tube (2), characterized in that: A heat-conducting sleeve (3) is arranged between the heating tube (2) and the reactor body (1), and a temperature-adjusting jacket (4) is arranged on the outside of the heating tube (2); The temperature regulating jacket (4) is provided with a refrigerant channel (402) and a heat-insulating cavity (403); the outer end surface of the temperature regulating jacket (4) is provided with a refrigerant inlet (412) and a refrigerant outlet (411) which are connected with the refrigerant channel (402); the heat-conducting sleeve (3) is fixedly mounted on the outer end surface of the reactor body (1); the outer end surface of the heat-conducting sleeve (3) is provided with a first positioning groove (301); the heating tube (2) is mounted in the first positioning groove (301); the inner end surface of the temperature regulating jacket (4) is provided with a second positioning groove (401) corresponding to the first positioning groove (301); the heating tube (2) is provided with a heat exchange plate (203); the bottom of the heating tube (2) is provided with a heat medium inlet (201); and the top of the heating tube (2) is provided with a heat medium outlet (202).

2. A temperature control device for producing pyridine chlorobromide according to claim 1, characterized in that: The heating tube (2) is a spiral copper tube, the first positioning groove (301) and the second positioning groove (401) are semicircular spiral grooves, and the radii of the first positioning groove (301) and the second positioning groove (401) are equal to the outer diameter of the heating tube (2).

3. A temperature control device for producing pyridine chlorobromide according to claim 1, characterized in that: The refrigerant channel (402) is a spiral circular channel, and the diameter ratio of the refrigerant channel (402) to the heating tube (2) is 1:

5.

4. A temperature control device for producing pyridine chlorobromide according to claim 3, characterized in that: The heat-insulating cavity (403) is two groups of spiral cavities, and the heat-insulating cavity (403) is located on the upper and lower sides of the refrigerant channel (402).

5. A temperature control device for producing pyridine chlorobromide according to claim 1, characterized in that: The temperature regulating jacket (4) is composed of three groups of temperature regulating plates (410) spliced ​​together, and adjacent temperature regulating plates (410) are fixedly connected by bolts.

6. A temperature control device for producing pyridine chlorobromide according to claim 5, characterized in that: A sealing strip (404) is provided on the side of the temperature regulating plate (410).

7. A temperature control device for producing pyridine chlorobromide according to claim 1, characterized in that: The heat exchange fins (203) are rectangular thin fins arranged in a circular array.

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