CN211514471U - Temperature regulating system in methylamine synthesis - Google Patents
Temperature regulating system in methylamine synthesis Download PDFInfo
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- CN211514471U CN211514471U CN201922100399.1U CN201922100399U CN211514471U CN 211514471 U CN211514471 U CN 211514471U CN 201922100399 U CN201922100399 U CN 201922100399U CN 211514471 U CN211514471 U CN 211514471U
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Abstract
The utility model provides a temperature regulating system in methylamine synthesis, which comprises a low temperature heat exchanger, wherein a low temperature first outlet of the low temperature heat exchanger is communicated with a medium temperature first inlet of an intermediate heat exchanger, and a medium temperature first inlet of the intermediate heat exchanger is communicated with a high temperature first inlet of a high temperature heat exchange device; the high-temperature first outlet of the high-temperature heat exchange device is communicated with the inlet at the top of the methylamine synthesis tower, the outlet at the bottom of the methylamine synthesis tower is communicated with the inlet of the crude product gas-liquid separation tank, the top end of the crude product gas-liquid separation tank is communicated with the condensing tank, the bottom end of the crude product gas-liquid separation tank is communicated with the rectification system, and the outlet of the rectification system is communicated with the medium-temperature second inlet of the intermediate. The system is used for heating the raw materials at the inlet of the methylamine reaction tower by recovering the temperature of the materials in the reaction process, so that the raw materials can reach the required initial temperature, and no additional energy and cost are consumed; the system can also control the temperature in the reaction tower in time, prevent the temperature from rising violently and effectively avoid the safety problem.
Description
Technical Field
The utility model belongs to the technical field of methylamine synthesis. In particular to a temperature regulating system in methylamine synthesis.
Background
In the prior art, methanol and liquid ammonia are generally used as raw materials for synthesizing methylamine. The initial reaction temperature of methylamine generated by the reaction of methanol and liquid ammonia is 330-350 ℃, but in the preparation process, even if a low-temperature heat exchanger and a series high-temperature heat exchanger are adopted to heat the raw materials at the same time, the highest temperature can only reach 310 ℃, the requirement of the initial reaction temperature cannot be met, the raw materials need to be heated by external forces such as an electric heater and the like, the consumption of a large amount of extra energy and cost is completed, and the cost is greatly increased in the process of large-scale synthesis.
When the synthesis reaction is carried out in a methylamine synthesis system, the reaction is a violent exothermic reaction, and the synthesis temperature is violently increased due to slight improper control in the reaction process, so that the synthesis catalyst is inactivated, and the synthesis tower is over-temperature and over-pressure and methanol is decomposed, thereby bringing about greater potential safety hazard. At present, the temperature in the synthesis process is controlled to rise sharply by increasing the nitrogen-carbon ratio or reducing the inlet temperature of the synthesis tower in normal production, but on one hand, the control means can influence the initial reaction due to low inlet temperature, and on the other hand, the control means can not realize efficient and timely control of the temperature in the reaction process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical problem be: in the process of producing methylamine by taking methanol and liquid ammonia as raw materials, the energy consumption and the cost are high by raising the temperature of the raw materials at the inlet of the reaction tower at present, and the production cost is greatly improved; meanwhile, the temperature in the reaction process is difficult to accurately and timely control and rises violently, so that a large amount of manpower and material resources are consumed in the temperature control process, and the safety problem caused by violent temperature rise also exists.
In order to solve the problems, the utility model provides a temperature regulating system in methylamine synthesis, which is used for heating the raw material at the inlet of a methylamine reaction tower by recovering the temperature of the material in the reaction process, so that the raw material can reach the required initial temperature without the consumption of extra energy and cost; the system can also control the temperature in the reaction tower in time, prevent the temperature from rising violently and effectively avoid the safety problem.
The utility model is produced by the following technical proposal
A temperature regulation system in the synthesis of methylamine, the system comprising:
a cryogenic heat exchanger having a cryogenic first inlet and a cryogenic first outlet;
the intermediate heat exchanger is provided with a medium-temperature first inlet and a medium-temperature first outlet, and the low-temperature first outlet is communicated with the medium-temperature first inlet;
the high-temperature heat exchange device is provided with a high-temperature first inlet and a high-temperature first outlet, and the medium-temperature first outlet is communicated with the high-temperature first inlet;
the high-temperature first outlet is communicated with an inlet at the top of the methylamine synthesis tower, an outlet at the bottom of the methylamine synthesis tower is communicated with an inlet of a crude product gas-liquid separation tank, the top end of the crude product gas-liquid separation tank is communicated with a condensing tank, the bottom end of the crude product gas-liquid separation tank is communicated with a rectification system, and an outlet of the rectification system is communicated with a medium-temperature second inlet of the intermediate heat exchanger.
The low-temperature heat exchanger also comprises a low-temperature second inlet and a low-temperature second outlet; the high-temperature heat exchange device also comprises a high-temperature second inlet and a high-temperature second outlet;
an outlet at the bottom of the methylamine synthesis tower is communicated with the high-temperature second inlet, the high-temperature second outlet is communicated with the low-temperature second inlet, the low-temperature second outlet is communicated with an inlet of a crude product gas-liquid separation tank, the top end of the crude product gas-liquid separation tank is communicated with a condensing tank, and the bottom end of the crude product gas-liquid separation tank is communicated with a rectification system.
In the temperature regulating system in the methylamine synthesis, the high-temperature heat exchange device comprises a high-temperature heat exchanger A, a high-temperature heat exchanger B and a high-temperature heat exchanger C;
the first inlet of the heat exchanger A is a high-temperature first inlet, the first outlet of the heat exchanger A is communicated with the first inlet of the heat exchanger B, the first outlet of the heat exchanger B is communicated with the first inlet of the heat exchanger C, and the first outlet of the heat exchanger C is a high-temperature first outlet; the second inlet of the heat exchanger C is a high-temperature second inlet, the second outlet of the heat exchanger C is communicated with the second inlet of the heat exchanger B, the second outlet of the heat exchanger B is communicated with the second inlet of the heat exchanger A, and the second outlet of the heat exchanger A is a high-temperature second outlet.
The temperature regulating system in methylamine synthesis further comprises a cooling pipeline, wherein an inlet of the cooling pipeline is communicated with a first outlet of a heat exchanger A of a high-temperature heat exchanger A, and an outlet of the cooling pipeline is communicated with a first outlet of a heat exchanger C.
The temperature regulating system in methylamine synthesis is characterized in that a flow regulating valve is arranged on the cooling pipeline.
The temperature regulation system in methylamine synthesis further comprises: the electric heating device is arranged between the high-temperature heat exchange device and the methylamine synthesis tower; the electric heating device is provided with an electric heating inlet and an electric heating outlet, the high-temperature first outlet is communicated with the electric heating inlet, and the electric heating outlet is communicated with the inlet at the top of the methylamine synthesis tower.
The temperature regulating system in the methylamine synthesis comprises an electric heating device and a temperature regulating device, wherein the electric heating device comprises a first electric heater and a second electric heater communicated with the first electric heater; the inlet of the first electric heater is an electric heating inlet, and the outlet of the second electric heater is an electric heating outlet.
The temperature regulating system in methylamine synthesis further comprises a start-up gasifier, wherein an inlet of the start-up gasifier is communicated with the low-temperature first outlet, and an outlet of the start-up gasifier is communicated with the medium-temperature first inlet.
Compared with the prior art, the utility model discloses following positive beneficial effect has
The system is connected with the intermediate heat exchanger and the high-temperature heat exchanger through the low-temperature heat exchanger, and can well preheat reaction raw materials, so that the reaction raw materials can reach reaction temperature when reaching an inlet of a synthesis tower, and efficient initial reaction is carried out.
The heat sources of the low-temperature heat exchanger and the high-temperature heat exchanger of the system are crude mixture materials synthesized by the methylamine synthesis tower, and the crude mixture materials are discharged after being subjected to heat exchange through the high-temperature heat exchanger and the low-temperature heat exchanger, so that the effect of cooling and recovering the materials is achieved, meanwhile, a heat source is provided for heating raw materials of the heat exchanger, the heat source is well recycled, the energy loss and the extra consumption are reduced, and the extra investment for reducing the temperature is reduced due to the influence of heat source discharge on the environment, and the good circulation effect is achieved; the intermediate heat exchanger heats the raw material (with the temperature of 110 ℃) discharged from the low-temperature heat exchanger by using the water tower kettle liquid (with the temperature of 160 ℃) discharged from the dehydration tower of the crude methylamine product rectification system, and then the raw material enters the high-temperature heater for heating after heating, so that the temperature of the raw material before reaction is obviously improved; meanwhile, the heat source of the rectification system is effectively recovered (the recovered water is safe and clean as the heat source), the whole system achieves a good circulation effect, and the production cost of the whole system is greatly reduced;
the system is also provided with an electric heater, and when the low-temperature heat exchanger, the intermediate heat exchanger and the high-temperature heat exchanger are heated by heat exchange and do not reach the initial temperature required by the reaction slightly, the electric heater is adopted to heat so as to reach the temperature required by the initial reaction and ensure the smooth proceeding of the reaction. The reactor heats the raw materials fully through the low-temperature heat exchanger, the intermediate heat exchanger and the high-temperature heat exchanger in the earlier stage, so that the large consumption of electric quantity of the electric heater due to low temperature is avoided, the consumption of an electric energy source is obviously reduced, and the production cost is reduced;
this system is still through setting up the pipeline that has the valve in first high temperature heat exchanger exit and third high temperature heat exchanger exit, can be with the material direct mixing in first high temperature discharge gate exhaust material (temperature is lower) and third high temperature heat exchanger exit, then directly enter into the reaction tower through this pipeline, play the effect of the interior temperature of quick reduction reaction tower, and temperature in the control tower that can be better, thereby the condition that the temperature suddenly risees in the better control reaction tower, can guarantee the security of system again, avoid the production of potential safety hazard. The control of rapid temperature rise of the reaction tower is realized through simple and easy-to-control operation, and the method has a good application prospect.
Drawings
FIG. 1 shows one of the schematic diagrams of a temperature regulation system in the synthesis of methylamine,
FIG. 2 shows a second schematic diagram of a temperature regulation system in the synthesis of methylamine,
FIG. 3 shows a third schematic diagram of a temperature regulation system in the synthesis of methylamine,
FIG. 4 shows a fourth schematic diagram of a temperature regulation system in the synthesis of methylamine,
FIG. 5 shows a fifth schematic diagram of a temperature regulation system in the synthesis of methylamine,
FIG. 6 shows a sixth schematic diagram of a temperature regulation system in the synthesis of methylamine,
the symbols in the drawings indicate that: 1 denotes a cryogenic heat exchanger, 1011 denotes a cryogenic first inlet, 1012 denotes a cryogenic first outlet, 1021 denotes a cryogenic second inlet, and 1022 denotes a cryogenic second outlet; 2, an intermediate heat exchanger, 2011, 2012, a medium-temperature first inlet, 2021, a medium-temperature second inlet, 3, a high-temperature heat exchanger, 3011, 3012, a high-temperature first outlet, 3021, a high-temperature second inlet, 3022, a high-temperature second outlet, 4 an electric heater, 4011, an electric heater, 4012, an electric heater, 5, a methylamine synthesis column, 5011, a top inlet of the methylamine synthesis column, 5012, a bottom outlet of the methylamine synthesis column, 6, a crude product gas-liquid separation tank, 6011, an inlet of the crude product gas-liquid separation tank, 7, a condensation tank, 8, a rectification system, 9, a start-up vaporizer, 10, a temperature reduction line, and 1001;
31 denotes a high temperature heat exchanger a, 32 denotes a high temperature heat exchanger B, 33 denotes a high temperature heat exchanger C, 3101 denotes a first outlet of heat exchanger a, 3102 denotes a second inlet of heat exchanger a, 3201 denotes a first inlet of heat exchanger B, 3202 denotes a first outlet of heat exchanger B, 3203 denotes a second inlet of heat exchanger B, 3204 denotes a second outlet of heat exchanger B, 3301 denotes a first inlet of heat exchanger C, 3302 denotes a second outlet of heat exchanger C, 41 denotes a first electric heater, and 42 denotes a second electric heater.
Detailed Description
The technical solution of the present invention is explained in more detail below through the specific embodiments, so as to facilitate the understanding of the technical solution of the present invention, but it is not used to limit the protection scope of the present invention.
The utility model provides a temperature regulation system in methylamine is synthetic, this system includes: a cryogenic heat exchanger 1 having a cryogenic first inlet 1011 and a cryogenic first outlet 1012; the intermediate heat exchanger 2 is provided with a medium-temperature first inlet 2011 and a medium-temperature first outlet 2012, and the low-temperature first outlet 1012 is communicated with the medium-temperature first inlet 2011; the high-temperature heat exchange device 3 is provided with a high-temperature first inlet 3011 and a high-temperature first outlet 3012, and the medium-temperature first outlet 2012 is communicated with the high-temperature first inlet 3011;
the high-temperature first outlet 3012 (305-350 ℃) is communicated with an inlet 5011 at the top of the methylamine synthesis tower (the temperature of the raw material is 330-350 ℃), the outlet 5012 at the bottom of the methylamine synthesis tower (410-420 ℃) is communicated with an inlet 6011 of a gas-liquid separation tank for crude products, the top end of the gas-liquid separation tank for crude products is communicated with a condensing tank 7, the bottom end of the gas-liquid separation tank for crude products is communicated with a rectification system 8, and the outlet of the rectification system 8 is communicated with a middle-temperature second inlet 2021 of an intermediate heat exchanger.
The raw materials prepared by the system are heated by a low-temperature heat exchanger, enter an intermediate heat exchanger to increase the temperature of the raw materials, then enter a high-temperature heat exchange device to be heated to the temperature required by the initial reaction of the raw materials, so that the raw materials are subjected to better reaction; wherein, a heat source inlet of the intermediate heat exchanger is communicated with the rectification system, and the rectification system conveys high-temperature water (160 ℃) generated in the process of processing the crude methylamine product to the intermediate heat exchanger to heat the raw material discharged from the low-temperature heat exchanger, so that the raw material can obtain higher temperature after entering the high-temperature heat exchanger, and the initial temperature required by the raw material reaction is reached.
Therefore, the system uses the recovered heat source for heating the system raw material, realizes the full utilization of the heat source, and simultaneously avoids the influence on the environment caused by the direct discharge of the heat source. And the raw materials can reach the temperature required by the initial reaction better after being heated by the intermediate heat exchanger, and an external power supply is not needed for heating, so that the consumption of an additional heat source and a large amount of power supply are reduced. The production cost of the whole system is reduced.
Further, the system also comprises an electric heating device 4 arranged between the high-temperature heat exchange device 3 and the methylamine synthesis tower 5; the electric heating device 4 is provided with an electric heating inlet 4011 and an electric heating outlet 4012 (330-350 ℃), the high-temperature first outlet 3012 is communicated with the electric heating inlet 4011, and the electric heating outlet 4012 is communicated with the top inlet 5011 of the methylamine synthesis tower. Preferably, the electric heating device 4 comprises a first electric heater 41 and a second electric heater 42 in communication with the first electric heater 41; the inlet of the first electric heater is an electric heating inlet, and the outlet of the second electric heater is an electric heating outlet.
Through the configuration of the electric heater, when the raw materials passing through the high-temperature heat exchanger do not reach the temperature required by the initial reaction, the raw materials are heated again through the electric heater to reach the reaction temperature, and the continuous and stable operation of the system is ensured. Because the raw materials are heated by the intermediate heat exchanger and the high-temperature heat exchanger in the earlier stage, the difference between the raw material temperature and the initial reaction temperature is reduced, the heat required to be provided by the electric heater is small, and the consumption is low.
The utility model also provides another temperature adjusting system in methylamine synthesis, the low temperature heat exchanger 1 also comprises a low temperature second inlet 1021 and a low temperature second outlet 1022; the high-temperature heat exchange device also comprises a high-temperature second inlet 3021 (410-420 ℃) and a high-temperature second outlet 3022 (150-160 ℃); an outlet 5012 at the bottom of the methylamine synthesis tower is communicated with a high-temperature second inlet 3021, the high-temperature second outlet 3022 is communicated with a low-temperature second inlet 1021 (150-160 ℃), a low-temperature second outlet 1022 (110-120 ℃) is communicated with an inlet 6011 of the crude product gas-liquid separation tank, the top end of the crude product gas-liquid separation tank 6 is communicated with a condensing tank 7, and the bottom end of the crude product gas-liquid separation tank is communicated with a rectification system 8. Namely, the material provides heat source for the high temperature heat exchanger and the low temperature heat exchanger.
Preferably, the high-temperature heat exchange device comprises a high-temperature heat exchanger A31, a high-temperature heat exchanger B32 and a high-temperature heat exchanger C33; a first inlet of the heat exchanger A is a high-temperature first inlet, a first outlet 3101 of the heat exchanger A is communicated with a first inlet 3201 of the heat exchanger B, a first outlet 3202 of the heat exchanger B is communicated with a first inlet 3301 of the heat exchanger C, and a first outlet of the heat exchanger C is a high-temperature first outlet; the second inlet of the heat exchanger C is a high-temperature second inlet, the second outlet 3302 of the heat exchanger C is communicated with the second inlet 3203 of the heat exchanger B, the second outlet 3204 of the heat exchanger B is communicated with the second inlet 3102 of the heat exchanger A, and the second outlet of the heat exchanger A is a high-temperature second outlet.
The method comprises the steps of discharging materials prepared by a methylamine synthesis tower from the methylamine synthesis tower, returning the materials to a high-temperature heat exchange device to be used as a heat exchange heat source of the high-temperature heat exchange device, continuously entering a low-temperature heat exchanger to be used as a heat exchange heat source of the low-temperature heat exchanger, discharging the materials from the low-temperature heat exchanger to enter a crude product gas-liquid separation tank for primary separation treatment, and then entering a rectification system for rectification treatment. The temperature of the reaction product is naturally and rapidly reduced, and the heat of the reaction product is well utilized, so that double effects are achieved, and a good practical application effect is achieved.
Preferably, the system further comprises a start-up gasifier 9, wherein an inlet of the start-up gasifier 9 is communicated with the low-temperature first outlet 1012, and an outlet of the start-up gasifier 9 is communicated with the medium-temperature first inlet 2011. The start-up gasifier enables the system to run smoothly when the system is started. When the vehicle is started, the raw material coming out of the low-temperature heat exchanger is gasified through the start-up gasifier and then enters the intermediate heat exchanger for heating.
The utility model also provides a temperature regulation system in another kind of methylamine is synthetic, this system still includes cooling pipeline 10, and cooling pipeline 10 entry is linked together with the first export 3101 of high temperature heat exchanger A's heat exchanger A, and cooling pipeline 10 export is linked together with the first export of heat exchanger C. Preferably, a flow regulating valve is arranged on the cooling pipeline.
The reaction for preparing methylamine by taking methanol and liquid ammonia as raw materials is a violent exothermic reaction, so the condition that the temperature in a synthesis tower needs to be controlled during the reaction process can not be rapidly increased. The material of this cooling pipeline in with high temperature heat exchanger A exit is directly linked together through the first export of high temperature heat exchanger C and methylamine synthetic tower, when the phenomenon that the temperature rises fast appears in the methylamine synthetic tower, opens cooling pipeline valve immediately, with the not too high material of temperature in the high temperature heat exchanger A (because the raw materials temperature of adding is low, can reduce the interior temperature of tower fast), mix with the material that comes out in the high temperature heat exchanger C, enter into in the tower. The temperature of the feeding material is reduced, the reaction is slowed down, and the temperature in the tower is also reduced. The cooling speed is fast, and the control temperature is fast, can reach better control effect, avoids the production of potential safety hazard.
The production of methylamine adopts the process of 'methanol continuous gas phase catalytic amination', takes methanol and liquid ammonia as raw materials, and obtains the primary, secondary and trimethylamine through gas phase catalytic reaction under the action of pressurization, high temperature and catalyst, and a series of primary and secondary reactions occur simultaneously.The main reaction is actually catalytic dehydration, ammonia (NH)3) The hydrogen atoms in the molecule are respectively substituted by one, two and three methyl (CH)3-) by a substituent.
The main reaction is as follows:
(1) CH3OH + NH3→ CH3NH2+ H2O + 20832J/mol
(2) 2CH3OH + NH3→ (CH3)2NH + 2H2O + 61152J/mol
(3) 3CH3OH + NH3→ (CH3)3N + 3H2O + 114912J/mol
because the difference of the reaction heat of the trimethylamine, the trimethylamine and the mono-amine is large, the prior art usually controls the proportion of products and the reaction temperature by material proportion. However, the adjustment of the raw material ratio cannot accurately control the temperature in the reaction process, and the temperature in the tower cannot be controlled any more when a fault occurs in the reaction process. When the temperature in the tower is higher than 450 ℃, a large amount of methanol is decomposed, and as a result, solid carbon particles or other substances are generated to block the pore surfaces of the catalyst, so that the pore distribution of the catalyst is changed, the activity of the catalyst is quickly reduced, and the service life is greatly shortened. The low-temperature heat exchanger, the intermediate heat exchanger, the high-temperature heat exchanger and the electric heating device of the system are all devices well known to those skilled in the art. The start-up gasifier is also a device well known to those skilled in the art.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity.
Exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above without departing from the concept of the present invention.
Claims (8)
1. A temperature regulation system in the synthesis of methylamine, characterized in that the system comprises:
a cryogenic heat exchanger (1) having a cryogenic first inlet (1011) and a cryogenic first outlet (1012);
the intermediate heat exchanger (2) is provided with a medium-temperature first inlet (2011) and a medium-temperature first outlet (2012), and the low-temperature first outlet is communicated with the medium-temperature first inlet;
the high-temperature heat exchange device (3) is provided with a high-temperature first inlet (3011) and a high-temperature first outlet (3012), and the medium-temperature first outlet is communicated with the high-temperature first inlet;
the high-temperature first outlet (3012) is communicated with an inlet (5011) at the top of a methylamine synthesis tower (5), an outlet (5012) at the bottom of the methylamine synthesis tower (5) is communicated with an inlet (6011) of a crude product gas-liquid separation tank (6), the top end of the crude product gas-liquid separation tank (6) is communicated with a condensing tank (7), the bottom end of the crude product gas-liquid separation tank (6) is communicated with a rectification system (8), and an outlet of the rectification system (8) is communicated with a middle-temperature second inlet (2021) of an intermediate heat exchanger.
2. A temperature regulation system in the synthesis of methylamine as claimed in claim 1, wherein the cryogenic heat exchanger further comprises a cryogenic second inlet (1021) and a cryogenic second outlet (1022);
the high-temperature heat exchange device (3) also comprises a high-temperature second inlet (3021) and a high-temperature second outlet (3022);
an outlet (5012) at the bottom of the methylamine synthesis tower is communicated with a high-temperature second inlet (3021), the high-temperature second outlet (3022) is communicated with a low-temperature second inlet (1021), a low-temperature second outlet (1022) is communicated with an inlet (6011) of a crude product gas-liquid separation tank (6), the top end of the crude product gas-liquid separation tank is communicated with a condensing tank (7), and the bottom end of the crude product gas-liquid separation tank is communicated with a rectification system (8).
3. A temperature regulation system in the synthesis of methylamine as claimed in claim 2,
the high-temperature heat exchange device (3) comprises a high-temperature heat exchanger A (31), a high-temperature heat exchanger B (32) and a high-temperature heat exchanger C (33);
a first inlet of the heat exchanger A is a high-temperature first inlet (3011), a first outlet (3101) of the heat exchanger A is communicated with a first inlet (3201) of the heat exchanger B, a first outlet (3202) of the heat exchanger B is communicated with a first inlet (3301) of the heat exchanger C, and a first outlet of the heat exchanger C is a high-temperature first outlet (3012);
the second inlet of the heat exchanger C is a high-temperature second inlet (3021), the second outlet (3302) of the heat exchanger C is communicated with the second inlet (3203) of the heat exchanger B, the second outlet (3204) of the heat exchanger B is communicated with the second inlet (3102) of the heat exchanger A, and the second outlet of the heat exchanger A is a high-temperature second outlet (3022).
4. A temperature regulation system in methylamine synthesis according to claim 3, wherein the system further comprises a cooling line (10), the inlet of the cooling line (10) is connected to the first outlet (3101) of the heat exchanger a of high temperature, and the outlet of the cooling line (10) is connected to the first outlet of the heat exchanger C.
5. The temperature regulating system in methylamine synthesis according to claim 4, wherein the cooling pipeline is provided with a flow regulating valve (1001).
6. A system for temperature regulation in the synthesis of methylamines as set forth in claim 1, further comprising: an electric heating device (4) arranged between the high-temperature heat exchange device (3) and the methylamine synthesis tower (5);
the electric heating device (4) is provided with an electric heating inlet (4011) and an electric heating outlet (4012), the high-temperature first outlet (3012) is communicated with the electric heating inlet (4011), and the electric heating outlet (4012) is communicated with a top inlet (5011) of the methylamine synthesis tower (5).
7. The temperature regulation system in methylamine synthesis according to claim 6, wherein the electric heating device (4) comprises a first electric heater (41) and a second electric heater (42) in communication with the first electric heater (41); the first electric heater inlet is an electric heating inlet (4011), and the second electric heater outlet is an electric heating outlet (4012).
8. The temperature regulation system in methylamine synthesis according to claim 2, wherein the system further comprises a start-up vaporizer (9), an inlet of the start-up vaporizer (9) is connected to the low temperature first outlet (1012), and an outlet of the start-up vaporizer (9) is connected to the medium temperature first inlet (2011).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110918022A (en) * | 2019-11-29 | 2020-03-27 | 安阳九天精细化工有限责任公司 | Temperature regulating system in methylamine synthesis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110918022A (en) * | 2019-11-29 | 2020-03-27 | 安阳九天精细化工有限责任公司 | Temperature regulating system in methylamine synthesis |
| CN110918022B (en) * | 2019-11-29 | 2024-07-26 | 安阳九天精细化工有限责任公司 | Temperature regulating system in methylamine synthesis |
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