CN213253074U - Improved 2-methylfuran rectification system - Google Patents
Improved 2-methylfuran rectification system Download PDFInfo
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- CN213253074U CN213253074U CN202021913263.9U CN202021913263U CN213253074U CN 213253074 U CN213253074 U CN 213253074U CN 202021913263 U CN202021913263 U CN 202021913263U CN 213253074 U CN213253074 U CN 213253074U
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Abstract
The utility model relates to a modified 2-methyl furan rectification system belongs to fine chemistry industry technical field, including 2-methyl furan crude tank, first charge pump, first heating cauldron, rectifying column, first condenser, 2-methyl furan finished product jar, backwash pump, first high boiling substance pump, flowmeter, first governing valve, first heating cauldron pressure gauge, second governing valve and rectifying column thermometer, high boiling substance crude tank, second charge pump, second heating cauldron, rectifier, second condenser, second high boiling substance pump, third governing valve, second heating cauldron pressure gauge, rectifier thermometer and fourth governing valve. The utility model discloses a modified 2-methyl furan rectification system, through relevant technological condition calculation, the selection and the automated control of equipment, adopt rectifying column and rectifier combined rectification, but both single line operation also series operation. Because the rectifier occupies a small area and the investment is relatively small, the 2-methylfuran rectification system has more flexibility, and the investment and the occupied area are reduced on the premise of ensuring the product quality.
Description
Technical Field
The utility model relates to a rectification system, in particular to modified 2-methyl furan rectification system belongs to fine chemistry industry technical field.
Background
2-methylfuran, alias sienna, is a colorless liquid, has an ether-like odor, and turns yellow to black in air or under sunlight. Slightly soluble in water, and miscible in ethanol, diethyl ether, acetone, etc. Is an intermediate of a pesticide pyrethroid insecticide.
The method is used for preparing medicines such as vitamin B1, chloroquine phosphate, primaquine phosphate and the like, synthesizing pyrethroid pesticides, essences and flavors, and is also a good solvent; as an organic solvent; 2-methylfuran is a raw material of allylic ketone serving as an intermediate of pyrethroid and propynethrin, and 2-methylfuran is a good solvent; the product is an organic synthesis intermediate, and can be used for preparing vitamin B1, chloroquine phosphate and primaquine phosphate in pharmaceutical industry. 2-methylfuran has anesthetic effect; organic synthesis intermediates, used in the pharmaceutical industry for the manufacture of vitamin B1, chloroquine phosphate and primaquine phosphate.
In the field of fine chemical production, the production of 2-methylfuran mainly comes from the byproduct of furfuryl alcohol production by furfural hydrogenation, and the production process is a high-pressure and high-temperature hydrogenation production process. Prepared by catalytic hydrogenation of furfural (or furfuryl alcohol). The hydrogenation catalyst adopts copper-aluminum alloy, alkali is used as a cocatalyst, the optimal condition of hydrogenation is that gas phase hydrogenation is carried out at the pressure of 300-500 kPa and the temperature of 200-210 ℃, and the molar ratio of hydrogen to furfural is 10: 1, the furfural feeding speed is 0.3 kg/(L.h). The reaction product is condensed, distilled to remove water and rectified to obtain the finished product. Raw material consumption quota: 1400kg/t of furfural (96%), 630m3kg/t of hydrogen and 114kg/t of copper-aluminum catalyst.
With the advent of new catalysts, the process has been replaced by atmospheric, low temperature gas phase hydrogenation to produce 2-methylfuran. The reaction products are mainly divided into two types, one type is a 2-methylfuran crude product, and the reaction product comprises 2-methylfuran, a small amount of water and high-boiling residues; the other is a crude product of high-boiling residues, which comprises the high-boiling residues, a small amount of water and 2-methylfuran. The ratio of the yield of the second crude high-boiling substance to the yield of the first crude 2-methylfuran is 1: 10.
the existing rectification process is to mix and distill two materials, for example, to distill off water in a high-boiling-point product, the requirement can be met only by double-tower rectification, and the investment and the occupied area are relatively large.
Therefore, the 2-methylfuran rectification system which has more flexibility, reduces investment and occupied area and can be operated in a single-line mode or in a series mode on the premise of ensuring the product quality is provided, and the technical problem which needs to be solved urgently in the technical field is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an improved 2-methyl furan rectification system, through relevant technology calculation, the selection and the automated control of equipment, adopt rectifying column and rectifier combined rectification, both can single line operation also series operation. Because the rectifier occupies a small area and the investment is relatively small, the 2-methylfuran rectification system has more flexibility, and reduces the investment and the occupied area on the premise of ensuring the product quality.
The above object of the utility model is achieved through the following technical scheme:
an improved 2-methylfuran rectification system comprises a 2-methylfuran crude product rectification system and a high-boiling-point substance crude product rectification system; the 2-methylfuran crude product rectifying system is connected with the high-boiling-point substance crude product rectifying system.
Preferably, the 2-methylfuran crude product rectification system comprises a 2-methylfuran crude product tank, a first feeding pump, a first heating kettle, a rectification tower, a first condenser, a 2-methylfuran finished product tank, a reflux pump, a first high-boiling-point substance pump, a flowmeter, a first regulating valve, a first heating kettle pressure gauge, a second regulating valve and a rectification tower temperature gauge; the inlet of the 2-methylfuran crude product tank is connected with the hydrogenation cooling system, and the outlet of the 2-methylfuran crude product tank is connected with the inlet of the first feeding pump; an outlet of the first feed pump is connected with a feed inlet of the rectifying tower through a pipeline, and the flow meter is positioned on the pipeline; the gas phase outlet of the first heating kettle is connected with the rectifying tower; a gas phase outlet of the rectifying tower is connected with a gas phase inlet of the first condenser; the outlet of the first condenser is connected with the 2-methylfuran finished product tank; the outlet of the 2-methyl furan finished product tank is connected with the inlet of the reflux pump, and the outlet of the 2-methyl furan finished product tank passes through the second regulating valve, part of the outlet is sent out of the device, and the other part of the outlet returns to the top of the rectifying tower; the other end of the first heating kettle is connected with a first high-boiling-point substance pump, a part of an outlet of the first high-boiling-point substance pump is sent out of the device, the first high-boiling-point substance pump is connected with the second heating kettle, and a first heating kettle pressure gauge is arranged on the first heating kettle; the upper end of the rectifying tower is provided with a rectifying tower thermometer.
Preferably, a steam inlet and a condensed water outlet of the first heating kettle are connected with a system pipe network, and the first heating kettle enters steam through a first regulating valve.
Preferably, the first condenser is provided with condensate water upper water and condensate water return water.
Preferably, the high-boiling-point substance crude product rectification system comprises a high-boiling-point substance crude product tank, a second feeding pump, a second heating kettle, a rectifier, a second condenser, a high-boiling-point substance pump, a third regulating valve, a second heating kettle pressure gauge, a rectifier temperature gauge and a fourth regulating valve; the inlet of the high-boiling-point crude product tank is connected with the hydrogenation cooling system, and the outlet of the high-boiling-point crude product tank is connected with the inlet of the second feeding pump; the outlet of the second feeding pump is connected with the second heating kettle; the gas phase outlet of the second heating kettle is connected with the rectifying machine; the gas phase outlet of the rectifier is connected with the second condenser; the second condenser is connected with a fourth regulating valve, part of the 2-methylfuran is sent out of the device, and part of the 2-methylfuran returns to the top of the rectifier; the bottom of the rectifier is connected with the second heating kettle; the second heating kettle is connected with a high-boiling-point substance pump, and an outlet of the high-boiling-point substance pump is sent out of the device to obtain a high-boiling-point substance; a second heating kettle pressure gauge is arranged on the second heating kettle; the upper end of the rectifier is provided with a temperature meter of the rectifier.
Preferably, a steam inlet and a condensed water outlet of the second heating kettle are connected with a system pipe network, and steam enters the second heating kettle through a third regulating valve.
Preferably, the second condenser is provided with condensate water upper water and condensate water return water.
Preferably, a first high-boiling-point substance pump in the 2-methylfuran crude product rectification system is connected with a second heating kettle in the high-boiling-point substance crude product rectification system.
Preferably, the system is also provided with explosion-proof electrical appliances.
Preferably, the system is also provided with a DCS system of a central control room.
Has the advantages that:
the utility model discloses a modified 2-methyl furan rectification system, through relevant technology calculation, the selection and the automated control of equipment, adopt rectifying column and rectifier to unite the rectification, but both single line operation also series operation. Because the rectifier occupies a small area and the investment is relatively small, the 2-methylfuran rectification system has more flexibility, and reduces the investment and the occupied area on the premise of ensuring the product quality.
The invention is further illustrated by the accompanying drawings and the detailed description, which are not meant to limit the scope of the invention.
Drawings
FIG. 1 is a schematic diagram of the improved 2-methylfuran rectification system of example 1 of the present invention.
Names of main parts:
12-methyl furan crude tank 2 first feeding pump
3 first heating kettle 4 rectifying tower
5 first condenser 62-methyl furan finished product tank
7 reflux pump 8 first high boiling substance pump
9 high-boiling residue crude product tank 10 second feeding pump
11 second heating kettle 12 rectifying machine
13 second condenser 14 second high boiling substance pump
15 flowmeter 16 first regulating valve
17 first heating kettle pressure gauge 18 second governing valve
19 distillation column thermometer 20 third regulating valve
21 second heating kettle pressure gauge and 22 rectifier temperature gauge
23 fourth regulating valve
Detailed Description
The present invention may be practiced, but is not limited to, in the following examples which are intended to be illustrative of the practice of the invention, and are not intended to limit the scope of the invention in any way, and in the following examples various procedures and methods not described in detail are conventional and well known in the art.
Example 1
As shown in fig. 1, the improved 2-methylfuran rectification system of embodiment 1 of the present invention is a schematic structural diagram, wherein 1 is a crude 2-methylfuran tank, 2 is a first feeding pump, 3 is a first heating kettle, 4 is a rectification tower, 5 is a first condenser, 6 is a finished 2-methylfuran tank, 7 is a reflux pump, 8 is a first high-boiling-point substance pump, 9 is a crude high-boiling-point substance tank, 10 is a second feeding pump, 11 is a second heating kettle, 12 is a rectification machine, 13 is a second condenser, 14 is a second high-boiling-point substance pump, 15 is a flow meter, 16 is a first regulating valve, 17 is a first heating kettle pressure meter, 18 is a second regulating valve, 19 is a rectification tower temperature meter, 20 is a third regulating valve, 21 is a second heating kettle pressure meter, 22 is a rectification machine temperature meter, and 23 is a fourth regulating valve; the improved 2-methylfuran rectification system of the utility model comprises a 2-methylfuran crude product rectification system and a high-boiling-point substance crude product rectification system which is connected in series with the 2-methylfuran crude product rectification system; the 2-methyl furan crude product rectification system comprises a 2-methyl furan crude product tank 1, a first feeding pump 2, a first heating kettle 3, a rectification tower 4, a first condenser 5, a 2-methyl furan finished product tank 6, a reflux pump 7, a first high-boiling-point substance pump 8, a flowmeter 15, a first regulating valve 16, a first heating kettle pressure gauge 17, a second regulating valve 18 and a rectification tower temperature gauge 19; the high-boiling-point substance crude product rectification system comprises a high-boiling-point substance crude product tank 9, a second feeding pump 10, a second heating kettle 11, a rectifier 12, a second condenser 13, a second high-boiling-point substance pump 14, a third regulating valve 20, a second heating kettle pressure gauge 21, a rectifier thermometer 22 and a fourth regulating valve 23; a first high-boiling-point substance pump 8 in the 2-methylfuran crude product rectification system is connected with a second heating kettle 11 in the high-boiling-point substance crude product rectification system;
the connection relation of the 2-methylfuran crude product rectification system is as follows: the inlet of the 2-methylfuran crude product tank 1 is connected with a hydrogenation cooling system, and the outlet is connected with the inlet of a first feeding pump 2; the outlet of the first feeding pump 2 is connected with the feeding hole of the rectifying tower 4 through a pipeline, and a flow meter 15 is positioned on the pipeline; the gas phase outlet of the first heating kettle 3 is connected with the rectifying tower 4; a gas phase outlet of the rectifying tower 4 is connected with a gas phase inlet of the first condenser 5; the outlet of the first condenser 5 is connected with a 2-methyl furan finished product tank 6; the outlet of the 2-methyl furan finished product tank 6 is connected with the inlet of the reflux pump 7, part of the outlet of the 2-methyl furan finished product tank 6 passes through the second regulating valve 18, and is sent out of the device, and the other part returns to the top of the rectifying tower 4; the other end of the first heating kettle 3 is connected with a first high-boiling-point substance pump 8, a part of the outlet of the first high-boiling-point substance pump 8 is sent out of the device, and the first high-boiling-point substance pump 8 is connected with a second heating kettle 11; a steam inlet and a condensed water outlet of the first heating kettle 3 are connected with a system pipe network, and steam enters the first heating kettle 3 through a first regulating valve 16; a first heating kettle pressure gauge 17 is arranged on the first heating kettle 3; a rectifying tower thermometer 19 is arranged at the upper end of the rectifying tower 4; the first condenser 5 is provided with condensate water upper water and condensate water return water;
the connection relationship of the high-boiling-point crude product rectification system is as follows: the inlet of the high-boiling-point crude product tank 9 is connected with a hydrogenation cooling system, and the outlet of the high-boiling-point crude product tank 9 is connected with the inlet of a second feeding pump 10; the outlet of the second feeding pump 10 is connected with a second heating kettle 11; the gas phase outlet of the second heating kettle 11 is connected with a rectifier 12; the gas phase outlet of the rectifier 12 is connected with a second condenser 13; the second condenser 13 is connected with a fourth regulating valve 23, part of 2-methylfuran is sent out of the device, and part of 2-methylfuran returns to the top of the rectifier 12; the bottom of the rectifier 12 is connected with the second heating kettle 11; the second heating kettle 11 is connected with a second high-boiling-point substance pump 14, and the outlet of the second high-boiling-point substance pump 14 is sent out of the device to obtain a high-boiling-point substance; a steam inlet and a condensed water outlet of the second heating kettle 11 are connected with a system pipe network, and steam enters the second heating kettle 11 through a third regulating valve 20; a second heating kettle pressure gauge 21 is arranged on the second heating kettle 11; a rectifier thermometer 22 is arranged at the upper end of the rectifier 12; the second condenser 13 is provided with condensate water upper water and condensate water return water.
The utility model discloses in, all consumer includes: the first feeding pump 2, the reflux pump 7, the first high boiling residue pump 8, the second feeding pump 10, the rectifying machine 12 and the second high boiling residue pump 14 are all provided with explosion-proof electric appliances.
All the meter devices include: a flowmeter 15, a first regulating valve 16, a first heating kettle pressure gauge 17, a second regulating valve 18, a rectifying tower temperature gauge 19, a third regulating valve 20, a second heating kettle pressure gauge 21, a rectifying machine temperature gauge 22 and a fourth regulating valve 23 all enter a central control room DCS system,
the utility model discloses a modified 2-methyl furan rectification system's theory of operation as follows:
2-methyl furan crude product in the 2-methyl furan crude product tank 1 enters a first heating kettle 3 through a first feeding pump 2 according to a certain flow rate; opening a first regulating valve 16, introducing steam for heating, and controlling the pressure of the first heating kettle 3 to be 0.01-0.05MPa through a first heating kettle pressure gauge 17; the distilled 2-methylfuran enters a rectifying tower 4; 2-methylfuran is evaporated from the top of the rectifying tower 4 and enters a first condenser 5 for condensation and cooling; the cooled 2-methylfuran enters a 2-methylfuran finished product tank 6; 2-methyl furan in the 2-methyl furan finished product tank 6 is pumped out through the reflux pump 7, one path of 2-methyl furan is sent out of the device, the other path of 2-methyl furan is used as reflux and returns to the top of the rectifying tower 4, and the purpose of controlling the reflux amount can be achieved by adjusting the sending amount through the second adjusting valve 18 due to the fact that the sending amount is relatively small and the reflux amount is relatively large, and then the temperature 19 of the rectifying tower is controlled. Controlling the temperature of a rectifying tower thermometer 19 to be 60-68 ℃; high-boiling-point substances at the bottom of the first heating kettle 3 are pumped out through a first high-boiling-point substance pump 8, one path of the high-boiling-point substances is sent out of the device, the other path of the high-boiling-point substances enters a second heating kettle 11, two paths of operation are either one of intermittent operation, when the quality index of the high-boiling-point substances at the bottom of the first heating kettle 3 meets the requirement, the high-boiling-point substances are sent out of the device, and when the quality index of the high-boiling-point substances at the bottom of the first heating kettle 3 does not meet the requirement, the high-boiling-point substances;
the crude product of the high-boiling-point substance in the crude product tank 9 enters a second heating kettle 11 through a second feeding pump 10; because the yield of the crude product of the high-boiling residue is low, intermittent feeding is adopted; opening a third regulating valve 20, introducing steam for heating, and controlling the pressure of the second heating kettle 11 to be 0.01-0.05MPa through a second heating kettle pressure gauge 21; the evaporated 2-methylfuran enters a rectifier 12; 2-methylfuran is evaporated from the rectifier 12, enters the second condenser 13, after condensation and cooling, one path is sent out of the device, and the other path is returned to the top of the rectifier 12 as reflux. Controlling the temperature of a temperature meter 22 of the rectifying machine to be 60-68 ℃; the high boiling substance at the bottom of the second heating kettle 11 is pumped out by a second high boiling substance pump 14 and sent out of the device.
The utility model discloses a modified 2-methyl furan rectification system, through relevant technological condition calculation, the selection and the automated control of equipment, adopt rectifying column and rectifier combined rectification, but both single line operation also series operation. Because the rectifier occupies a small area and the investment is relatively small, the 2-methylfuran rectification system has more flexibility, and the investment and the occupied area are reduced on the premise of ensuring the product quality.
Claims (10)
1. An improved 2-methylfuran rectification system is characterized in that: comprises a 2-methylfuran crude product rectification system and a high-boiling-point substance crude product rectification system; the 2-methylfuran crude product rectifying system is connected with the high-boiling-point substance crude product rectifying system.
2. The improved 2-methylfuran rectification system of claim 1, wherein: the 2-methyl furan crude product rectification system comprises a 2-methyl furan crude product tank, a first feeding pump, a first heating kettle, a rectification tower, a first condenser, a 2-methyl furan finished product tank, a reflux pump, a first high-boiling-point substance pump, a flowmeter, a first regulating valve, a first heating kettle pressure gauge, a second regulating valve and a rectification tower temperature gauge; the inlet of the 2-methylfuran crude product tank is connected with the hydrogenation cooling system, and the outlet of the 2-methylfuran crude product tank is connected with the inlet of the first feeding pump; an outlet of the first feed pump is connected with a feed inlet of the rectifying tower through a pipeline, and the flow meter is positioned on the pipeline; the gas phase outlet of the first heating kettle is connected with the rectifying tower; a gas phase outlet of the rectifying tower is connected with a gas phase inlet of the first condenser; the outlet of the first condenser is connected with the 2-methylfuran finished product tank; the outlet of the 2-methyl furan finished product tank is connected with the inlet of the reflux pump, and the outlet of the 2-methyl furan finished product tank passes through the second regulating valve, part of the outlet is sent out of the device, and the other part of the outlet returns to the top of the rectifying tower; the other end of the first heating kettle is connected with a first high-boiling-point substance pump, a part of an outlet of the first high-boiling-point substance pump is sent out of the device, the first high-boiling-point substance pump is connected with the second heating kettle, and a first heating kettle pressure gauge is arranged on the first heating kettle; the upper end of the rectifying tower is provided with a rectifying tower thermometer.
3. The improved 2-methylfuran rectification system of claim 2, wherein: and a steam inlet and a condensed water outlet of the first heating kettle are connected with a system pipe network, and the first heating kettle enters steam through a first regulating valve.
4. The improved 2-methylfuran rectification system of claim 3, wherein: the first condenser is provided with condensate water upper water and condensate water return water.
5. The improved 2-methylfuran rectification system of claim 4, wherein: the high-boiling-point substance crude product rectification system comprises a high-boiling-point substance crude product tank, a second feeding pump, a second heating kettle, a rectification machine, a second condenser, a second high-boiling-point substance pump, a third regulating valve, a second heating kettle pressure gauge, a rectification machine temperature gauge and a fourth regulating valve; the inlet of the high-boiling-point crude product tank is connected with the hydrogenation cooling system, and the outlet of the high-boiling-point crude product tank is connected with the inlet of the second feeding pump; the outlet of the second feeding pump is connected with the second heating kettle; the gas phase outlet of the second heating kettle is connected with the rectifying machine; the gas phase outlet of the rectifier is connected with the second condenser; the second condenser is connected with a fourth regulating valve, part of the 2-methylfuran is sent out of the device, and part of the 2-methylfuran returns to the top of the rectifier; the bottom of the rectifier is connected with the second heating kettle; the second heating kettle is connected with a second high-boiling-point substance pump, and an outlet of the second high-boiling-point substance pump is sent out of the device to obtain a high-boiling-point substance; a second heating kettle pressure gauge is arranged on the second heating kettle; the upper end of the rectifier is provided with a temperature meter of the rectifier.
6. The improved 2-methylfuran rectification system of claim 5, wherein: and a steam inlet and a condensed water outlet of the second heating kettle are connected with a system pipe network, and the second heating kettle is used for feeding steam through a third regulating valve.
7. The improved 2-methylfuran rectification system of claim 6, wherein: and the second condenser is provided with condensate water upper water and condensate water return water.
8. The improved 2-methylfuran rectification system of claim 7, wherein: and a first high-boiling-point substance pump in the 2-methylfuran crude product rectifying system is connected with a second heating kettle in the high-boiling-point substance crude product rectifying system.
9. The improved 2-methylfuran rectification system of claim 8, wherein: a first feeding pump, a reflux pump, a first high-boiling-point substance pump, a second feeding pump, a rectifying machine and a second high-boiling-point substance pump in the system are all provided with explosion-proof electric appliances.
10. The improved 2-methylfuran rectification system of claim 9, wherein: the system is also provided with a central control room DCS system, wherein the flow meter, the first regulating valve, the first heating kettle pressure gauge, the second regulating valve, the rectifying tower thermometer, the third regulating valve, the second heating kettle pressure gauge, the rectifying machine thermometer and the fourth regulating valve all enter the central control room DCS system.
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Effective date of registration: 20230901 Address after: 300203 202, Area B, No. 147, Guangrong Road, Hongqiao District, Tianjin Patentee after: Tianjin Jinruiyang Engineering Technology Co.,Ltd. Address before: 300200 9-36-1415 Fusheng garden, Fujian Road, Hexi District, Tianjin Patentee before: Wang Shuo |