CN217288336U - Continuous flow pipeline hydrogenation device - Google Patents
Continuous flow pipeline hydrogenation device Download PDFInfo
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- CN217288336U CN217288336U CN202220869016.6U CN202220869016U CN217288336U CN 217288336 U CN217288336 U CN 217288336U CN 202220869016 U CN202220869016 U CN 202220869016U CN 217288336 U CN217288336 U CN 217288336U
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Abstract
The utility model provides a continuous flow pipeline hydrogenation device, which comprises a liquid feeding unit, a gas feeding unit, a mixing unit, a reaction unit and a separation unit; the liquid feeding unit and the gas feeding unit are respectively connected with the mixing unit; the mixing unit, the reaction unit and the separation unit are connected in sequence; the separation unit is also connected with the gas feeding unit; the reaction unit comprises a fixed bed pipeline reactor. The utility model discloses the reaction unit who utilizes fixed bed pipeline reactor design has simple structure, reaction material quantity is few, and mass transfer heat transfer is rapid, easy control, operation safety, hydrogen high-usage, characteristics such as product quality height have important meaning to industrial production.
Description
Technical Field
The utility model belongs to the technical field of chemical industry equipment, a continuous flow pipeline hydrogenation device is related to.
Background
The hydrogenation process is a process of adding hydrogen atoms to organic compound molecules. Hydrogenation process is mostly exothermic reaction, and is often carried out under high temperature and high pressure, which is one of the dangerous processes in the chemical industry field at present.
CN105085724A, which discloses a hydrogenation device and a hydrogenation method for polymer continuous hydrogenation, the device comprises a hydrogenation kettle, a hydrogen pipeline, a polymer glue solution feeding pipeline and a hydrogenation catalyst feeding pipeline which are respectively connected with the upper part of the hydrogenation kettle, the lower part of the hydrogenation kettle is connected with a polymer glue solution discharging pipeline, a jet reactor is arranged on the upper part of the inner cavity of the hydrogenation kettle, the inlet end of the jet reactor is connected with the outlet end of a circulating liquid heat exchanger outside the hydrogenation kettle through a backflow pipeline, the polymer glue solution discharging pipeline is provided with branches connected with the inlet end of the circulating liquid heat exchanger, and a circulating pump is arranged on the polymer glue solution discharging pipeline; and a polymer glue solution feeding pipeline and a hydrogenation catalyst feeding pipeline are connected to the return pipeline in parallel.
CN101906046A discloses a method and a device for producing o-phenylenediamine by a liquid continuous hydrogenation method, wherein the reaction is carried out in a first-stage hydrogenation reaction kettle and a second-stage hydrogenation reaction kettle which are connected in series, methanol which is 50-70% of the volume of the reaction kettle is added into the first-stage hydrogenation reaction kettle and the second-stage hydrogenation reaction kettle, a catalyst which is 0.5-1.5% of the weight of the methanol is added into the first-stage hydrogenation reaction kettle and the second-stage hydrogenation reaction kettle, and hydrogen is continuously introduced into the first-stage hydrogenation reaction kettle and the second-stage hydrogenation reaction kettle under the stirring state; and when certain pressure is reached in the first-stage hydrogenation reaction kettle and the second-stage hydrogenation reaction kettle, continuously adding methanol and o-nitroaniline into the first-stage hydrogenation reaction kettle, continuously keeping the pressure of the first-stage hydrogenation reaction kettle and the pressure of the second-stage hydrogenation reaction kettle, and simultaneously discharging from the first-stage hydrogenation reaction kettle to the second-stage hydrogenation reaction kettle and continuously discharging from the second-stage hydrogenation reaction kettle.
The device and the method mostly adopt the traditional hydrogenation equipment, namely a high-pressure hydrogenation reaction kettle, have the defects of more materials, large hydrogen consumption, repeated replacement, more hydrogen loss, easy leakage and the like, and have great potential safety hazard. Therefore, the method has important significance in finding a hydrogenation device which has simple structure, uses less materials and can ensure the safety.
The continuous flow pipeline reactor is a research hotspot in the field of chemical industry, has the advantages of simple structure, less reaction materials, rapid mass and heat transfer, easy control, safe operation and the like as a field of green chemistry, and is focused by the chemical industry. The method can be used in hydrogenation process, and the safety of reaction can be greatly improved.
CN202343171U discloses continuous hydrogenation of pipeline is reduced device, including batching jar, high pressure measuring pump and manometer, batching jar, high pressure measuring pump and manometer connect gradually through the pipeline, still include intermediate layer formula pipeline hydrogenation reduction reactor, temperature monitor, hydrogen feeding check valve, the hydrogen measuring pump, the discharge valve of sample, ejection of compact choke valve, the vapor phase balance valve, the material receiving tank, material receiving tank discharge valve, level gauge and bleeder valve, high pressure measuring pump and hydrogen measuring pump pass through the homonymy of tube connection to intermediate layer formula pipeline hydrogenation reduction reactor, sample discharge valve is connected respectively through the pipeline to intermediate layer formula pipeline hydrogenation reduction reactor opposite side, tank bottom and material receiving tank top are received to the material. Although the device avoids using a high-pressure hydrogenation reactor, the hydrogen utilization rate is low.
Therefore, how to provide a hydrogenation device which can realize continuous feeding of reaction substrates and continuous discharging of reaction products, reduce the safety risk of the hydrogenation process and save the cost becomes an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims to provide a continuous flow pipeline hydrogenation device, continuous flow pipeline hydrogenation device utilizes fixed bed pipeline reactor can realize the continuous feeding of reaction substrate and the continuous ejection of compact of reaction resultant, effectively promotes the security of reaction, has important meaning to industrial production.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a continuous flow pipeline hydrogenation device, which comprises a liquid feeding unit, a gas feeding unit, a mixing unit, a reaction unit and a separation unit;
the liquid feeding unit and the gas feeding unit are respectively connected with the mixing unit;
the mixing unit, the reaction unit and the separation unit are connected in sequence;
the separation unit is also connected with the gas feeding unit;
the reaction unit comprises a fixed bed pipeline reactor.
In the utility model, the hydrogenation device mixes hydrogen and liquid raw materials and then feeds the mixture to improve the mass transfer process of the reaction, and realizes the continuous feeding of reaction substrates and the continuous discharging of reaction products by using a fixed bed pipeline reactor, so that the raw material consumption is small, the safety risk of the hydrogenation process is effectively reduced, the product quality is improved, and the environmental pollution is reduced; moreover, the gas separated after the reaction is finished is returned to the gas feeding unit for cyclic utilization, so that the utilization rate of hydrogen is improved, and the industrial production is facilitated.
Following conduct the utility model discloses preferred technical scheme, nevertheless do not conduct the utility model provides a technical scheme's restriction, through following technical scheme, can reach and realize better the utility model discloses a technical purpose and beneficial effect.
As the utility model discloses preferred technical scheme, liquid feed unit is including the dissolving kettle, liquor pump, fluidflowmeter and the first heat exchanger that connect gradually.
The utility model discloses in, liquid raw materials mixes with hydrogen after preheating through first heat exchanger, can make the gas-liquid mixture more even, and the reaction is more abundant, and the accessory substance still less.
As the utility model discloses preferred technical scheme, gaseous feed unit is including the hydrogen steel bottle, hydrogen storage tank and the hydrogen flowmeter that connect gradually, just be provided with the relief pressure valve on the outlet line of hydrogen steel bottle.
As a preferred technical solution of the present invention, the mixing unit includes a gas-liquid mixer.
The utility model discloses in, gas-liquid mixer can make the gas-liquid mixture more even, and the reaction is more abundant, and the accessory substance is still less, and the product yield is higher.
As the utility model discloses preferred technical scheme, the separation element is including the second heat exchanger and vapour and liquid separator that connect gradually.
The utility model discloses in, the setting of second heat exchanger can be with the reaction after solution fall to the room temperature, makes things convenient for the aftertreatment.
As the utility model discloses preferred technical scheme, the second heat exchanger includes plate heat exchanger.
As the preferred technical proposal of the utility model, the continuous flow pipeline hydrogenation device also comprises a hydrogen booster pump.
As the preferred technical scheme of the utility model, the separating unit passes through the hydrogen booster pump with the hydrogen storage tank links to each other.
As the utility model discloses preferred technical scheme, vapour and liquid separator's bottom is provided with the product outlet, and is provided with the choke valve on the product outlet pipeline.
The utility model provides a continuous flow pipeline hydrogenation device's theory of operation as follows:
adding a hydrogenation catalyst into a fixed bed pipeline reactor with movable sintering plates arranged at the upper part and the lower part; after a liquid reaction substrate is dissolved in a dissolving kettle, the liquid reaction substrate is accurately metered through a liquid pump, a liquid control valve and a liquid flowmeter, then enters a gas-liquid mixer through heat exchange, meanwhile, hydrogen is also accurately metered through the hydrogen flowmeter and then enters the gas-liquid mixer, the hydrogen and liquid raw materials are uniformly mixed in the gas-liquid mixer and then enter a fixed bed pipeline reaction pipeline from the upper part, the reaction is carried out under the action of a hydrogenation catalyst, after the reaction is finished, a product is discharged from the lower part of a reaction pipe, after the temperature is reduced through a heat exchanger, the product enters a gas-liquid separation tank for gas-liquid separation, the separated gas is pressurized through a gas booster pump and then is recycled, and the liquid enters the next process for treatment.
Compared with the prior art, the utility model discloses following beneficial effect has:
the continuous flow pipeline hydrogenation device of the utility model can improve the mass transfer process of the reaction by mixing hydrogen with the liquid raw material and then feeding the mixture, and realizes the continuous feeding of reaction substrates and the continuous discharging of reaction products by using the fixed bed pipeline reactor, the consumption of the raw materials is small, the safety risk of the hydrogenation process is effectively reduced, the quality of the product is improved, and the environmental pollution is reduced; on the other hand, the gas separated after the reaction is finished is returned to the gas feeding unit for cyclic utilization, so that the utilization rate of hydrogen is improved, and the industrial production is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a continuous flow pipeline hydrogenation apparatus provided in embodiment 1 of the present invention.
The system comprises a dissolving kettle 1, a liquid pump 2, a liquid flow meter 3, a first heat exchanger 4, a hydrogen steel bottle 5, a hydrogen storage tank 6, a hydrogen flow meter 7, a pressure reducing valve 8, a gas-liquid mixer 9, a fixed bed pipeline reactor 10, a second heat exchanger 11, a gas-liquid separator 12, a throttling valve 13 and a hydrogen booster pump 14.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention will be further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.
Example 1:
the embodiment provides a continuous flow pipeline hydrogenation device, the schematic structural diagram of which is shown in fig. 1, the continuous flow pipeline hydrogenation device comprises a liquid feeding unit, a gas feeding unit, a mixing unit, a reaction unit and a separation unit;
the liquid feeding unit and the gas feeding unit are respectively connected with the mixing unit;
the mixing unit, the reaction unit and the separation unit are connected in sequence;
the separation unit is also connected to the gas feed unit.
Further, the liquid feeding unit comprises a dissolving kettle 1, a liquid pump 2, a liquid flow meter 3 and a first heat exchanger 4 which are connected in sequence.
Further, the gas feeding unit comprises a hydrogen gas steel cylinder 5, a hydrogen gas storage tank 6 and a hydrogen gas flowmeter 7 which are connected in sequence, and a pressure reducing valve 8 is arranged on an outlet pipeline of the hydrogen gas steel cylinder 5.
Further, the mixing unit includes a gas-liquid mixer 9.
Further, the reaction unit comprises a fixed bed pipe reactor 10.
Further, the separation unit comprises a second heat exchanger 11 and a gas-liquid separator 12 which are connected in sequence, the second heat exchanger 11 is a plate heat exchanger, a product outlet is formed in the bottom of the gas-liquid separator 12, and a throttle valve 13 is arranged on a product outlet pipeline.
Further, the continuous flow pipeline hydrogenation device further comprises a hydrogen booster pump 14, and the separation unit is connected with the hydrogen storage tank 6 through the hydrogen booster pump 14.
Comparative example 1:
this comparative example provides a continuous flow pipeline hydrogenation unit that differs from the hydrogenation unit of example 1 only in that: no mixing unit, i.e. no gas-liquid mixer 9, is provided.
In this comparative example, since the gas raw material and the liquid raw material were not sufficiently mixed in advance, but were directly introduced into the fixed bed pipe reactor 10 from the upper part, the gas and the liquid were introduced into the reactor, respectively, and the mixing was insufficient, resulting in increase and decrease of reaction impurities and decrease of yield.
Comparative example 2:
this comparative example provides a continuous flow pipeline hydrogenation unit that differs from the hydrogenation unit of example 1 only in that: the first heat exchanger 4 is not provided.
In the comparative example, the first heat exchanger 4 is not arranged, and the liquid raw material is directly fed into the gas-liquid mixer 9 after the flow is accurately measured, so that the temperature of the reaction liquid cannot meet the requirement, the reaction of reaction substrates is incomplete, the product yield is low, and the impurities are high.
Comparative example 3:
this comparative example provides a continuous flow pipeline hydrogenation unit that differs from the hydrogenation unit of example 1 only in that: the second heat exchanger 11 is not provided.
In this comparative example, since the second heat exchanger 11 was not provided, the product was directly introduced into the gas-liquid separator 12, so that the reaction liquid was not cooled, the gas-liquid temperature was high, and a large amount of the solvent entered the booster pump in the form of steam, and liquefied under pressurization by the booster pump, which caused a failure of the booster pump.
It can be seen from the above examples and comparative examples that, the continuous flow pipeline hydrogenation apparatus of the present invention mixes hydrogen with liquid raw materials and then feeds the mixture to improve the mass transfer process of the reaction, and by using the fixed bed pipeline reactor, realizes the continuous feeding of reaction substrates and the continuous discharging of reaction products, has small raw material usage, effectively reduces the safety risk of the hydrogenation process, improves the product quality, and reduces the environmental pollution; on the other hand, the gas separated after the reaction is finished is returned to the gas feeding unit for cyclic utilization, so that the utilization rate of hydrogen is improved, and the industrial production is facilitated.
The applicant states that the present invention is described in detail by the above embodiments, but the present invention is not limited to the above detailed structure, i.e. the present invention can be implemented only by relying on the above detailed structure. It should be clear to those skilled in the art that any improvement of the present invention, to the addition of the equivalent replacement of the structure and the auxiliary structure, the selection of the specific mode, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (9)
1. A continuous flow pipeline hydrogenation apparatus, characterized in that the continuous flow pipeline hydrogenation apparatus comprises a liquid feeding unit, a gas feeding unit, a mixing unit, a reaction unit and a separation unit;
the liquid feeding unit and the gas feeding unit are respectively connected with the mixing unit;
the mixing unit, the reaction unit and the separation unit are connected in sequence;
the separation unit is also connected with the gas feeding unit;
the reaction unit comprises a fixed bed pipeline reactor.
2. The continuous-flow pipeline hydrogenation apparatus of claim 1, wherein the liquid feed unit comprises a dissolution tank, a liquid pump, a liquid flow meter, and a first heat exchanger connected in series.
3. The continuous flow pipeline hydrogenation apparatus of claim 1, wherein the gas feeding unit comprises a hydrogen cylinder, a hydrogen storage tank and a hydrogen flow meter connected in sequence, and a pressure reducing valve is disposed on an outlet pipeline of the hydrogen cylinder.
4. The continuous-flow pipeline hydrogenation apparatus of claim 1, wherein the mixing unit comprises a gas-liquid mixer.
5. The continuous-flow pipeline hydrogenation apparatus of claim 1, wherein the separation unit comprises a second heat exchanger and a gas-liquid separator connected in series.
6. The continuous-flow conduit hydrogenation unit of claim 5, wherein the second heat exchanger comprises a plate heat exchanger.
7. The continuous-flow pipeline hydrogenation unit of claim 3, further comprising a hydrogen booster pump.
8. The continuous-flow pipeline hydrogenation apparatus of claim 7, wherein the separation unit is connected to the hydrogen storage tank via the hydrogen booster pump.
9. The continuous flow pipeline hydrogenation unit of claim 6, wherein the bottom of the gas-liquid separator is provided with a product outlet, and a throttling valve is provided on the product outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220869016.6U CN217288336U (en) | 2022-04-14 | 2022-04-14 | Continuous flow pipeline hydrogenation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220869016.6U CN217288336U (en) | 2022-04-14 | 2022-04-14 | Continuous flow pipeline hydrogenation device |
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| Publication Number | Publication Date |
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| CN217288336U true CN217288336U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220869016.6U Active CN217288336U (en) | 2022-04-14 | 2022-04-14 | Continuous flow pipeline hydrogenation device |
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| CN (1) | CN217288336U (en) |
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