Improved condenser for bromination reaction

Abstract

The utility model discloses an improved bromination reaction condenser which comprises a reaction kettle body, a stirrer is fixed at the top of the reaction kettle body, an anchor type stirring paddle is fixed at the center of the bottom of the stirrer, and a tower top thermometer is arranged on one side, close to the stirrer, of the top of the reaction kettle body. A water layer is arranged on the outer surface of the reaction kettle body, and the position, close to the edge of one side, of the top of the water layer is communicated with a water adding pipe. According to the reaction kettle, air enters the top of the first condenser and is emptied from the bottom of the first condenser, so that condensed raw materials can better flow back into the reaction kettle body, the loss of the raw materials is reduced, the yield is improved, the emptied gas phase is subjected to secondary condensation through the second condenser, organic raw materials can be condensed and recycled, and then the organic raw materials are recycled for production; the dropping speed of bromine can be accelerated, and the reaction time is reduced by half.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bromination reaction technical field especially relates to an improved condenser for bromination reaction. BACKGROUND

[0002] Bromination reaction is a kind of reaction that benzene (producing bromobenzene raw material) or n-hexanol (producing bromohexane raw material), n-octanol (producing bromooctane raw material) and corresponding catalyst are added into reaction kettle, and bromine is dropped under certain temperature.

[0003] The existing bromination reaction greatly increases the loss of raw materials and reduces the yield because of the air inlet from the bottom of the condenser and the air outlet from the top.The dropping speed of bromine is slow when the existing bromination reaction is carried out, and a large amount of gas will be produced and take away organic raw materials if the dropping speed is too fast, thereby greatly reducing the reaction time.The tail gas will take away a large amount of brominated alkyl raw materials when the existing alkali washing and water washing kettle is vented, which will waste raw materials.The existing heating and heat preservation by steam will make the heat preservation temperature unstable, which will make the reaction not perfect and cause the loss of raw materials. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides an improved condenser for bromination reaction.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: An improved condenser for bromo-substitution reaction, comprising a reaction kettle body, a stirrer is fixed on the top of the reaction kettle body, an anchor type stirring paddle is fixed at the bottom center of the stirrer, a tower top temperature table is arranged on one side of the top of the reaction kettle body close to the stirrer, and a pressure table is arranged on the other side close to the stirrer, a water layer is arranged on the outer surface of the reaction kettle body, a water adding pipe is communicated with the top of the water layer close to one side edge, a water outlet pipe is communicated with the bottom of the water layer close to one side edge, support seats are welded on the bottom of the reaction kettle body close to both end edges, a steam layer is arranged on the outer surface of the water layer, first, second and third reflux pipes are communicated with the top of the reaction kettle body close to one side edge at equal intervals, first and second condensers are communicated with one end of the first and second reflux pipes respectively, a third condenser is communicated with one end of the third reflux pipe through a short pipe, support rods are welded on both end edges of the bottom of the first, second and third condensers respectively, and the bottom end of the support rod is welded with the top of the reaction kettle body, circulating water inlet pipes are communicated with the outer surface of one side of the first, second and third condensers close to the bottom edge respectively, three circulating water inlet pipes are arranged, and one end of the three circulating water inlet pipes is communicated with a first pipeline, a first connecting pipe is communicated with the bottom of the first pipeline close to one end edge, a circulating water inlet valve is arranged on the outer surface of one side of the first connecting pipe close to the bottom edge, a water pump is connected to one end of the first connecting pipe, and a water tank is fixed on the bottom of the water pump.

[0006] As a further description of the above technical scheme:

[0007] The other outer surfaces of the first, second and third condensers close to the bottom edges are all communicated with circulating backwater pipes, three circulating backwater pipes are arranged, and one end of the three circulating backwater pipes is communicated with a second pipeline.

[0008] As a further description of the above technical scheme:

[0009] A second connecting pipe is communicated with the bottom center of the second pipeline, a circulating backwater valve is arranged on the outer surface of one side of the second connecting pipe, and one end of the second connecting pipe extends to the inside of the water tank.

[0010] As a further description of the above technical scheme:

[0011] A dropping tube is fixed on one side of the top of the reaction kettle body close to the third condenser, one end of the dropping tube extends to the inside of the reaction kettle body, a bromine tank is communicated with the top of the dropping tube, and a dropping speed valve is arranged on the outer surface of one side of the dropping tube close to the top edge.

[0012] As a further description of the above technical solutions:

[0013] One end of the third reflux pipe is communicated with a waste gas pipe, and one end of the waste gas pipe is communicated with a waste gas treatment device.

[0014] As a further description of the above technical solutions:

[0015] First, the second reflux pipe and the third reflux pipe are respectively provided with first, second and third automatic control valves at the center of the outer surface of one side.

[0016] As a further description of the above technical solutions:

[0017] The center of the outer surface of one side of the steam layer is communicated with a steam pipe, and the outer surface of one side of the steam pipe is provided with a steam valve near the edge of one end, one end of the steam pipe is connected with a heating medium conveying pump, and one end of the heating medium conveying pump is connected with a steam conveying pipe.

[0018] As a further description of the above technical solutions:

[0019] The bottom center of the first condenser, the second condenser and the third condenser is communicated with a hollow pipe, and one end of the hollow pipe extends to the inside of the reaction kettle body.

[0020] As described above, due to the adoption of the above technical solutions, the beneficial effects of the present application are:

[0021] 1: In the present application, the gas is introduced into the top of the first condenser and the bottom is vented, so that the condensed raw materials can be better returned to the inside of the reaction kettle body, reducing the loss of raw materials and improving the yield. The gas phase is condensed by the second condenser, and the organic raw materials can be recovered and used for production, which can speed up the dropping speed of bromine and reduce the reaction time by half. The third condenser can better condense the tail gas of the alkali washing and water washing kettle, better reduce the volatilization of brominated alkyl and improve the yield and the environment. By adopting three-stage condensation, energy can be better saved, and the product can be better cooled.

[0022] 2: The utility model discloses a top temperature table is set up in the top of the reation kettle body, can better carry out temperature automatic regulation according to the circulating water amount of condenser, saves the energy source, improves product quality again, is provided with first automatic control valve, second automatic control valve and third automatic control valve on the one side outer surface of first condenser, second condenser and third condenser respectively, links first automatic control valve, second automatic control valve and third automatic control valve according to the temperature set on the top of the reation kettle body, and the circulating water amount is automatically regulated, thereby adjusting the internal reflux amount, and the temperature of the top of the reation kettle body is adjusted, bromobenzene and dibromobenzene are separated well, and when distilling dibromobenzene, prevent condensing temperature from being too low and condensing into solid and blocking pipeline, cause danger, through water bath heating, steam interlock, the accurate stable control of hot water temperature, when bromobenzene synthesis reaction, the temperature, pressure and heating medium delivery pump safety interlock of the reation kettle body, when the temperature, pressure of the reation kettle body exceeds the set value, heating medium delivery pump is automatically powered off, stops the delivery heating medium, guarantees the safety of production. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The utility model provides a kind of reaction kettle of condenser for improved bromination reaction;

[0024] Fig. 2 The utility model provides a kind of front view of the top side of the reaction kettle of condenser for improved bromination reaction;

[0025] Fig. 3 A kind of front view of steam pipeline part for the utility model proposes a kind of condenser for improved bromination reaction.

[0026] In the drawing: 1, tower top temperature table;2, stirrer;3, pressure gauge;4, water pipe;5, reation kettle body;6, water layer;7, steam layer;8, support seat;9, water outlet pipe;10, anchor type stirring paddle;11, support rod;12, first automatic control valve;13, first reflux pipe;14, first condenser;15, second automatic control valve;16, second reflux pipe;17, second condenser;18, third automatic control valve;19, third reflux pipe;20, third condenser;21, bromine tank;22, drop speed valve;23, dropping tube;24, circulating water inlet pipe;241, first pipeline;242, circulating backwater pipe;243, second pipeline;244, water tank;245, water pump;25, waste gas pipe;26, waste gas treatment device;27, first connecting pipe;28, circulating water inlet valve;29, circulating backwater valve;30, second connecting pipe;31, steam pipeline;32, steam valve;33, heating medium delivery pump;34, steam delivery pipeline. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] With reference to Figs. 1-3The utility model provides an improved bromo reaction condenser, including reation kettle body 5, the top of reation kettle body 5 is fixed with stirrer 2, the bottom center of stirrer 2 is fixed with anchor type stirring paddle 10, the top of reation kettle body 5 is close to the side of stirrer 2 and is provided with tower top thermometer 1, and is close to the other side of stirrer 2 and is provided with pressure gauge 3, the outer surface of reation kettle body 5 is provided with water layer 6, the top of water layer 6 is close to one side edge and is connected with water adding pipe 4, the bottom of water layer 6 is close to one side edge and is connected with water outlet pipe 9, the bottom of reation kettle body 5 is close to both end edges and is welded with support seat 8, the outer surface of water layer 6 is provided with steam layer 7, the top of reation kettle body 5 is close to one side edge and is communicated with first reflux pipe 13, second reflux pipe 16 and third reflux pipe 19 at equal intervals, one end of first reflux pipe 13 and second reflux pipe 16 is connected with first condenser 14 and second condenser 17 respectively, the bottom of third reflux pipe 19 is close to one end edge and is connected with third condenser 20 through short tube, the bottom of first condenser 14, second condenser 17 and third condenser 20 is close to both end edges and is welded with support rod 11, and the bottom end of support rod 11 is welded with the top of reation kettle body 5, one side outer surface of first condenser 14, second condenser 17 and third condenser 20 is close to the bottom edge and is connected with circulating water inlet pipe 24, circulating water inlet pipe 24 is provided with three, and one end of three circulating water inlet pipes 24 is connected with first pipeline 241, the bottom of first pipeline 241 is close to one end edge and is connected with first connecting pipe 27, one side outer surface of first connecting pipe 27 is close to the bottom edge and is provided with circulating water valve 28, one end of first connecting pipe 27 is connected with water pump 245, water pump 245 adopts horizontal centrifugal pump SH high-flow industrial pump, the bottom of water pump 245 is fixed with water tank 244, by the air inlet of first condenser 14 top, bottom empty, so that the raw material under condensation can be better in reflux to the inside of reation kettle body 5, reduces the loss of raw material, improves the yield, by the secondary condensation of the gas phase emptying through second condenser 17, can condense and recover organic raw material, is recovered for production again, can accelerate the dropping speed of bromine, reduces half reaction time, by third condenser 20, can better condense the tail gas of caustic washing and water washing kettle, can better reduce the volatilization of bromoalkane, improves the yield, improves the environment, by adopting three-stage condensation, can better save energy, and better cooling product, the top of reation kettle body 5 is provided with tower top thermometer 1 according to the circulating water amount of condenser, can better carry out temperature automatic regulation, saves energy, and improves product quality, one side outer surface of first condenser 14, second condenser 17 and third condenser 20 is provided with first automatic control valve 12, second automatic control valve 15 and third automatic control valve 18 respectively, according to the temperature set at the top of reation kettle body 5 linkage first automatic control valve 12, second automatic control valve 15 and third automatic control valve 18, automatically regulate circulating water amount, thereby adjust internal reflux amount,Further adjust the temperature of the top of the reaction kettle body 5, so that bromine benzene and dibromobenzene get good separation, and in the distillation of dibromobenzene, prevent the condensation temperature is too low and condensation into solid block pipeline, cause danger, by using water bath heating, hot water temperature and steam interlock, hot water temperature can control the accurate and stable, in the bromobenzene synthesis reaction, the temperature of the reaction kettle body 5, pressure and heating medium delivery pump 33 safety interlock, when the temperature of the reaction kettle body 5, pressure exceeds the set value, heating medium delivery pump 33 automatic power off, stop delivery of heating medium, ensure the safety of production.

[0029] The other side of the first condenser 14, the second condenser 17 and the third condenser 20 outer surface near the bottom edge is communicated with circulating backwater pipe 242, and the circulating backwater pipe 242 is provided with three, and one end of the three circulating backwater pipe 242 is communicated with the second pipe 243, the bottom center of the second pipe 243 is communicated with the second connecting pipe 30, and the side surface center of the second connecting pipe 30 is provided with a circulating backwater valve 29, and one end of the second connecting pipe 30 extends to the inside of the water tank 244, the top of the reaction kettle body 5 near the side of the third condenser 20 is fixed with a dropping tube 23, and one end of the dropping tube 23 extends to the inside of the reaction kettle body 5, the top of the dropping tube 23 is communicated with a bromine tank 21, and the side surface of the dropping tube 23 near the top edge is provided with a dripping speed valve 22, one end of the third backflow pipe 19 is communicated with a waste gas pipe 25, and one end of the waste gas pipe 25 is communicated with a waste gas treatment device 26, the side surface center of the first backflow pipe 13, the second backflow pipe 16 and the third backflow pipe 19 is respectively provided with a first automatic valve 12, a second automatic valve 15 and a third automatic valve 18, the side surface center of the steam layer 7 is communicated with a steam pipe 31, and the side surface of the steam pipe 31 near one end edge is provided with a steam valve 32, one end of the steam pipe 31 is connected with a heating medium delivery pump 33, one end of the heating medium delivery pump 33 is connected with a steam conveying pipe 34, the heating medium delivery pump 33 adopts NYP high viscosity pump, the bottom center of the first condenser 14, the second condenser 17 and the third condenser 20 is communicated with a hollow pipe, and one end of the hollow pipe extends to the inside of the reaction kettle body 5.

[0030] Working principle: when the worker uses the reaction kettle body 5, the first reflux pipe 13 is used to introduce the gas into the top of the first condenser 14, so that the condensed raw materials can be better returned to the inside of the reaction kettle body 5 through the hollow pipe, the loss of the raw materials is reduced, the yield is improved, the gas phase is condensed again by the second condenser 17, the organic raw materials can be condensed and recovered, and the bromine dropping speed is accelerated, the reaction time is reduced by half, the tail gas of the alkali washing and water washing kettle can be better condensed by the third condenser 20, the volatilization of the brominated alkyl is better reduced, the yield is improved, the environment is improved, the tower top temperature table 1 is arranged at the top of the reaction kettle body 5, and the temperature can be better automatically adjusted according to the circulating water amount of the condenser, energy is saved, and the product quality is improved, the first automatic control valve 12, the second automatic control valve 15 and the third automatic control valve 18 are arranged on the outer surfaces of the first condenser 14, the second condenser 17 and the third condenser 20 respectively, the first automatic control valve 12, the second automatic control valve 15 and the third automatic control valve 18 are linked according to the temperature set at the top of the reaction kettle body 5, the circulating water amount is automatically adjusted, the internal reflux amount is adjusted, and then the temperature at the top of the reaction kettle body 5 is adjusted, so that the bromobenzene and the dibromobenzene are well separated, and when the dibromobenzene is distilled, the condensation temperature is prevented from being too low to condense into solid and block the pipeline, causing danger, the water bath heating is adopted, the hot water temperature is interlocked with steam, the hot water temperature can be accurately and stably controlled, when the bromobenzene is synthesized, the temperature and the pressure of the reaction kettle body 5 are interlocked with the heating medium conveying pump 33, when the temperature and the pressure of the reaction kettle body 5 exceed the set value, the heating medium conveying pump 33 is automatically powered off, the conveying of the heating medium is stopped, and the safety of production is ensured.

[0031] Finally, it should be pointed out that: the above only preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still be modified to the technical solutions recorded in the foregoing embodiments, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. An improved condenser for bromination reactions comprising a reactor body (5) characterized by: The top of the reactor body (5) is fixed with a stirrer (2), the bottom center of the stirrer (2) is fixed with an anchor stirring paddle (10), the top of the reactor body (5) is provided with a tower top thermometer (1) near one side of the stirrer (2), and a pressure gauge (3) is arranged near the other side of the stirrer (2), the outer surface of the reactor body (5) is provided with a water layer (6), the top of the water layer (6) is communicated with a water adding pipe (4) near one side edge, the bottom of the water layer (6) is communicated with a water outlet pipe (9) near one side edge, the bottom of the reactor body (5) is welded with a supporting seat (8) near both end edges, the outer surface of the water layer (6) is provided with a steam layer (7), the top of the reactor body (5) is communicated with a first reflux pipe (13), a second reflux pipe (16) and a third reflux pipe (19) at equal intervals near one side edge, one end of the first reflux pipe (13) and the second reflux pipe (16) is communicated with a first condenser (14) and a second condenser (17) respectively, the bottom of the third reflux pipe (19) is communicated with a third condenser (20) through a short pipe near one end edge, the bottom of the first condenser (14), the second condenser (17) and the third condenser (20) is welded with a supporting rod (11) near both end edges, and the bottom end of the supporting rod (11) is welded with the top of the reactor body (5), the outer surface of one side of the first condenser (14), the second condenser (17) and the third condenser (20) is communicated with a circulating water inlet pipe (24) near the bottom edge, the first condenser (14), the second condenser (17) and the third condenser (20) are provided with three circulating water inlet pipes (24), and one end of the three circulating water inlet pipes (24) is communicated with a first pipeline (241), the bottom of the first pipeline (241) is communicated with a first connecting pipe (27) near one end edge, the outer surface of one side of the first connecting pipe (27) is provided with a circulating water inlet valve (28) near the bottom edge, one end of the first connecting pipe (27) is connected with a water pump (245), and the bottom of the water pump (245) is fixed with a water tank (244).

2. An improved condenser for bromination reactions as claimed in claim 1, wherein: The outer surface of the other side of the first condenser (14), the second condenser (17) and the third condenser (20) is communicated with a circulating backwater pipe (242) near the bottom edge, and the circulating backwater pipe (242) is provided with three, and one end of the three circulating backwater pipes (242) is communicated with a second pipeline (243).

3. An improved condenser for bromination reactions as claimed in claim 2, wherein: The bottom center of the second pipeline (243) is communicated with a second connecting pipe (30), the outer surface of one side of the second connecting pipe (30) is provided with a circulating backwater valve (29), and one end of the second connecting pipe (30) extends to the inside of the water tank (244).

4. An improved condenser for bromination reactions as claimed in claim 1, wherein: The top of the reactor body (5) is fixed with a dropping tube (23) near one side of the third condenser (20), and one end of the dropping tube (23) extends to the inside of the reactor body (5), the top of the dropping tube (23) is communicated with a bromine tank (21), and the outer surface of one side of the dropping tube (23) is provided with a dropping speed valve (22) near the top edge.

5. An improved condenser for bromination reactions as claimed in claim 1, wherein: One end of the third reflux pipe (19) is communicated with a waste gas pipe (25), and one end of the waste gas pipe (25) is communicated with a waste gas treatment device (26).

6. An improved condenser for bromination reactions as claimed in claim 1, wherein: First, the second reflux pipe (13), (16) and the third reflux pipe (19) one side of the outer surface center are provided with first automatic valve (12), second automatic valve (15) and third automatic valve (18) respectively.

7. An improved condenser for bromination reactions as claimed in claim 1, wherein: One side of the outer surface center of the steam layer (7) is communicated with a steam pipe (31), and one side of the outer surface of the steam pipe (31) is provided with a steam valve (32) near one end edge, one end of the steam pipe (31) is connected with a heating medium conveying pump (33), one end of the heating medium conveying pump (33) is connected with a steam conveying pipe (34).

8. An improved condenser for bromination reactions as claimed in claim 1, wherein: The bottom center of the first condenser (14), the second condenser (17) and the third condenser (20) are all communicated with a hollow pipe, and one end of the hollow pipe extends to the inside of the reaction kettle body (5).

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