CN215559033U - Energy-saving and consumption-reducing CO2 production device - Google Patents

Abstract

The utility model discloses an energy-saving and consumption-reducing CO2 production device in the technical field of carbon dioxide tail gas recycling, which comprises a duplex body preheater, a dealkylation preheater, an electric heater, a dealkylation reactor and a first connecting pipe, wherein the duplex body preheater, the dealkylation preheater, the electric heater and the dealkylation reactor jointly form a heat recycling system; the utility model has reasonable structural design, when in use, the gas at the outlet of the CO2 compressor directly enters the dealkylation duplex preheater, and fully exchanges heat with the high-temperature gas from the outlet of the dealkylation reactor in the duplex preheater A/B and the dealkylation preheater equipment in a reverse flow way through the heat exchange tubes, so that the inlet temperature of the dealkylation electric heater is greatly improved, thereby the running power of the dealkylation electric heater equipment is reduced, the energy consumption of a dealkylation device is greatly reduced, and simultaneously, the temperature of the gas at the outlet of the dealkylation device equipment is reduced to 120 ℃ from the original 200 ℃, and the energy consumption of the refrigeration equipment of a post system is also greatly reduced.

Description

Energy-saving and consumption-reducing CO2 production device

Technical Field

The utility model relates to the technical field of carbon dioxide tail gas recycling, in particular to an energy-saving and consumption-reducing CO2 production device.

Background

Carbon dioxide, a carbon oxide compound of the formula CO2, with the formula weight of 44.0095, is a colorless and odorless gas at normal temperature and pressure, and the aqueous solution of the gas is slightly sour, is also a common greenhouse gas, and is one of the components of air (accounting for 0.03-0.04% of the total volume of the atmosphere). In terms of physical properties, carbon dioxide has a melting point of-56.6 ℃ (527kPa), a boiling point of-78.5 ℃, a density greater than that of air (under standard conditions), and is soluble in water. In terms of chemical properties, carbon dioxide is inert in chemical properties, high in thermal stability (only 1.8% decomposition at 2000 ℃), incapable of combustion, generally incapable of combustion, belongs to an acidic oxide, has the general property of the acidic oxide, and is carbonic acid anhydride due to the fact that carbonic acid is generated by reaction with water;

when CO2 is produced, dealkylation is needed when food-grade liquid CO2 is prepared through recycling, a dealkylation catalytic reaction needs a heat source as a condition, the heat source comes from a 180KW electric heater in a system, and an original device dealkylation system has certain defects when CO2 tail gas is purified, so that the energy consumption of a production device is high, and the problem that the heat of the system is not completely recycled by the original dealkylation device, the high-load operation of refrigeration equipment of a rear system is caused, and the corrosion of the equipment is aggravated is also caused, so that an energy-saving and consumption-reducing CO2 production device is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving and consumption-reducing CO2 production device to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an energy saving and consumption reduction's CO2 apparatus for producing, includes doublet preheater, dealkylation preheater, electric heater, dealkylation reactor and first connecting tube, doublet preheater, dealkylation preheater, electric heater and dealkylation reactor constitute heat recycle system jointly, doublet preheater, dealkylation preheater, electric heater and dealkylation reactor arrange from a left side to the right side equidistance in proper order, doublet preheater includes preheater A and preheater B, the left top of preheater A communicates there is first intake pipe, the one end that preheater A was kept away from to first intake pipe is linked together with outside CO2 compressor, the top on preheater A right side and the left top of preheater B communicate through first connecting tube, the top on preheater B right side communicates there is first exhaust pipe, the left bottom of dealkylation preheater communicates there is the second intake pipe, the end, far away from the preheater B, of the first exhaust pipe is communicated with a second connecting pipe, the end, far away from the first exhaust pipe, of the second connecting pipe is communicated with a second air inlet pipe, the top, far away from the right side of the dealkylation preheater is communicated with the top, the left side of the electric heater is communicated with a third air inlet pipe, the left end of the third air inlet pipe is communicated with a fourth connecting pipe, one end, far away from the third air inlet pipe, of the fourth connecting pipe is communicated with the top, the right side of the electric heater is communicated with a second exhaust pipe, the bottom of the dealkylation reactor is communicated with a fourth air inlet pipe, the bottom of the fourth air inlet pipe is communicated with a fifth connecting pipe, one end, far away from the fourth air inlet pipe, of the fifth connecting pipe is communicated with the second exhaust pipe, the top of the dealkylation reactor is communicated with the third exhaust pipe, the right side of the dealkylation preheater and the top thereof are communicated with a first backflow pipe, and the right end of the first backflow pipe is communicated with a sixth connecting pipe, one end, far away from the first backflow pipe, of the sixth connecting pipe is communicated with a third exhaust pipe, the preheater A, the preheater B and the dehydrocarbon preheater are arranged in a row of pipes, and baffle plates are additionally arranged in the preheater A, the preheater B and the dehydrocarbon preheater.

Preferably, the left side of the dehydrocarbon preheater and the bottom of the second air inlet pipe are communicated with a second backflow pipe, the right side of the preheater B and the bottom of the first exhaust pipe are communicated with a third backflow pipe, the right end of the third backflow pipe is communicated with a seventh connecting pipe, and one end, away from the third backflow pipe, of the seventh connecting pipe is communicated with the second air inlet pipe.

Preferably, the top on the left side of the preheater B is communicated with an eighth connecting pipe, one end, far away from the preheater B, of the eighth connecting pipe is communicated with the top on the right side of the preheater A, and the bottom, on the left side of the preheater A and located in the first air inlet pipe, of the preheater A is communicated with a degassing pipe.

Preferably, the heat recycling system comprises three recycling heat exchange devices which are uniformly distributed along the horizontal direction at equal intervals.

Preferably, the outer surface of each communication pipeline is coated with 150mm silicate heat-insulating coating.

Preferably, the number of the baffles in the preheater a and the preheater B is sixteen, and the number of the baffles in the dealkylation preheater is four.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has reasonable structural design, when in use, the gas at the outlet of the CO2 compressor directly enters the dealkylation duplex body preheater, and fully exchanges heat with the high-temperature gas from the outlet of the dealkylation reactor in the duplex body preheater A/B and the dealkylation preheater equipment in a reverse flow way through the heat exchange tubes, so that the inlet temperature of the electric dealkylation heater is greatly improved, the running power of the electric dealkylation heater equipment is reduced, and the energy consumption of a dealkylation device is greatly reduced. Meanwhile, the temperature of the gas at the outlet of the hydrocarbon removing device is reduced to 120 ℃ from the original 200 ℃, so that the energy consumption of the refrigeration equipment of the rear system is greatly reduced, and the practicability of the device is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of the structure of the energy utilization key device of the present invention.

In the figure: 1. a duplex preheater; 111. a preheater A; 112. a preheater B; 2. a de-hydrocarbon preheater; 3. an electric heater; 4. a de-hydrocarbon reactor; 5. a first intake pipe; 6. a first connecting pipe; 7. a first exhaust pipe; 8. a second intake pipe; 9. a second connecting pipe; 10. a third intake pipe; 11. a fourth connecting pipe; 12. a second exhaust pipe; 13. a fourth intake pipe; 14. a fifth connecting pipe; 15. a third exhaust pipe; 16. a first reflux tube; 17. a sixth connecting pipe; 18. a second reflux tube; 19. a third reflux tube; 20. a seventh connecting pipe; 21. an eighth connecting pipe; 22. and a degassing pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a CO2 production device with energy saving and consumption reduction functions comprises a duplex body preheater 1, a dealkylation preheater 2, an electric heater 3, a dealkylation reactor 4 and a first connecting pipe 6, wherein the duplex body preheater 1, the dealkylation preheater 2, the electric heater 3 and the dealkylation reactor 4 jointly form a heat recycling system, the duplex body preheater 1, the dealkylation preheater 2, the electric heater 3 and the dealkylation reactor 4 are sequentially arranged from left to right at equal intervals, the duplex body preheater 1 comprises a preheater A111 and a preheater B112, the top of the left side of the preheater A111 is communicated with a first air inlet pipe 5, one end of the first air inlet pipe 5, which is far away from the preheater A111, is communicated with an external CO2 compressor, the top of the right side of the preheater A111 is communicated with the top of the left side of the preheater B112 through the first connecting pipe 6, the top of the right side of the preheater B112 is communicated with a first exhaust pipe 7, the bottom of the left side of the dealkylation preheater 2 is communicated with a second air inlet pipe 8, one end of the first exhaust pipe 7, which is far away from the preheater B112, is communicated with a second connecting pipe 9, one end of the second connecting pipe 9, which is far away from the first exhaust pipe 7, is communicated with a second air inlet pipe 8, the top of the right side of the dealkylation preheater 2 is communicated with a third air inlet pipe 10, the bottom of the left side of the electric heater 3 is communicated with a third air inlet pipe 10, the left end of the third air inlet pipe 10 is communicated with a fourth connecting pipe 11, one end of the fourth connecting pipe 11, which is far away from the third air inlet pipe 10, is communicated with the 23, the fixed protection of the right side of the electric heater 3 is communicated with a second exhaust pipe 12, the bottom of the dealkylation reactor 4 is communicated with a fourth air inlet pipe 13, the bottom of the fourth air inlet pipe 13 is communicated with a fifth connecting pipe 14, one end of the fifth connecting pipe 14, which is far away from the fourth air inlet pipe 13, is communicated with the second exhaust pipe 12, the top of the dealkylation reactor 4 is communicated with a third exhaust pipe 15, the right side of the dealkylation reactor 2, the top, which is positioned at the 23, is communicated with a first inverse flow pipe 16, and the right end of the first inverse flow pipe 16 is communicated with a sixth connecting pipe 17, one end of the sixth connecting pipe 17, which is far away from the first backflow pipe 16, is communicated with the third exhaust pipe 15, the interiors of the preheater A111, the preheater B112 and the dealkylation preheater 2 are all arranged in a row pipe manner, and baffle plates are additionally arranged in the interiors of the preheater A111, the preheater B112 and the dealkylation preheater 2.

Referring to fig. 1, a second backflow pipe 18 is communicated with the left side of the hydrocarbon removal preheater 2 and the bottom of the second inlet pipe 8, a third backflow pipe 19 is communicated with the right side of the preheater B112 and the bottom of the first exhaust pipe 7, a seventh connecting pipe 20 is communicated with the right end of the third backflow pipe 19, and one end of the seventh connecting pipe 20, which is far away from the third backflow pipe 19, is communicated with the second inlet pipe 8;

referring to fig. 1, the top of the left side of the preheater B112 is communicated with an eighth connecting pipe 21, one end of the eighth connecting pipe 21 away from the preheater B112 is communicated with the top of the right side of the preheater a111, and the bottom of the first air inlet pipe 5 at the left side of the preheater a111 is communicated with a degassing pipe 22;

referring to fig. 1, the heat recycling system includes three recycling heat exchange devices, and the three recycling heat exchange devices are uniformly distributed at equal intervals along the horizontal direction;

referring to fig. 1, the outer surface of each communicating pipe is coated with 150mm silicate heat-insulating paint;

referring to fig. 1, sixteen baffles are provided in preheater a and preheater B112, and four baffles are provided in the dealkylating preheater 2;

when in use, the raw material gas from the outlet of the CO2 compressor enters and exits from the tube side between the preheater A111 and the preheater B112, enters the tube side of the dealkylation preheater 2, enters the tube side of the electric heater 3, finally enters the dealkylation reactor 4, the high-temperature CO2 gas after purification reaction enters the shell side of the dealkylation reactor 4 after exiting from the dealkylation reactor 4, and fully exchanges heat with the raw material CO2 gas through the reverse flow of the shell sides of the preheater A111 and the preheater B112, so that the inlet temperature of the electric heater 3 is greatly improved, the operation power of the dealkylation electric heater equipment is greatly reduced, the energy consumption of the dealkylation device is greatly reduced, meanwhile, the temperature of the outlet gas of the dealkylation device is greatly reduced, the energy consumption of the rear system refrigeration equipment is also reduced, the practicability of the device is greatly improved, and the problem that the rear system refrigeration equipment runs under high load due to incomplete recovery of the original dealkylation device is effectively solved, and also causes a problem of increased corrosion of the equipment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an energy saving and consumption reduction's CO2 apparatus for producing, includes doublet pre-heater (1), takes off hydrocarbon pre-heater (2), electric heater (3), takes off hydrocarbon reactor (4) and first connecting pipe (6), doublet pre-heater (1), takes off hydrocarbon pre-heater (2), electric heater (3) and takes off hydrocarbon reactor (4) constitute heat recovery and utilize system jointly, its characterized in that: the double-body preheater (1), the dealkylation preheater (2), the electric heater (3) and the dealkylation reactor (4) are sequentially arranged at equal intervals from left to right, the double-body preheater (1) comprises a preheater A (111) and a preheater B (112), the left top of the preheater A (111) is communicated with a first air inlet pipe (5), one end, away from the preheater A (111), of the first air inlet pipe (5) is communicated with an external CO2 compressor, the right top of the preheater A (111) is communicated with the left top of the preheater B (112) through a first connecting pipe (6), the right top of the preheater B (112) is communicated with a first exhaust pipe (7), the left bottom of the dealkylation preheater (2) is communicated with a second air inlet pipe (8), one end, away from the preheater B (112), of the first exhaust pipe (7) is communicated with a second connecting pipe (9), one end, far away from the first exhaust pipe (7), of the second connecting pipe (9) is communicated with a second air inlet pipe (8), the top on the right side of the dehydrocarbon preheater (2) is communicated with a connecting pipe (23), the bottom on the left side of the electric heater (3) is communicated with a third air inlet pipe (10), the left end of the third air inlet pipe (10) is communicated with a fourth connecting pipe (11), one end, far away from the third air inlet pipe (10), of the fourth connecting pipe (11) is communicated with the connecting pipe (23), the fixed protection on the right side of the electric heater (3) is communicated with a second exhaust pipe (12), the bottom of the dehydrocarbon reactor (4) is communicated with a fourth air inlet pipe (13), the bottom of the fourth air inlet pipe (13) is communicated with a fifth connecting pipe (14), one end, far away from the fourth air inlet pipe (13), of the fifth connecting pipe (14) is communicated with the second exhaust pipe (12), and the top of the dehydrocarbon reactor (4) is communicated with a third exhaust pipe (15), the right side of the hydrocarbon removal preheater (2) and the top located in the (23) are communicated with a first backflow pipe (16), the right end of the first backflow pipe (16) is communicated with a sixth connecting pipe (17), one end, far away from the first backflow pipe (16), of the sixth connecting pipe (17) is communicated with a third exhaust pipe (15), the preheater A (111), the preheater B (112) and the hydrocarbon removal preheater (2) are arranged in a row of pipes, and baffle plates are additionally arranged in the preheater A (111), the preheater B (112) and the hydrocarbon removal preheater (2).

2. The energy-saving and consumption-reducing CO2 production device according to claim 1, wherein: the bottom intercommunication that the left side of dealkylation pre-heater (2) just is located second intake pipe (8) has second backflow pipe (18), the bottom intercommunication that the right side of pre-heater B (112) just is located first exhaust pipe (7) has third backflow pipe (19), the right-hand member intercommunication of third backflow pipe (19) has seventh connecting pipe (20), the one end and the second intake pipe (8) intercommunication that third backflow pipe (19) were kept away from in seventh connecting pipe (20).

3. The energy-saving and consumption-reducing CO2 production device according to claim 1, wherein: the top on the left side of the preheater B (112) is communicated with an eighth connecting pipe (21), one end, away from the preheater B (112), of the eighth connecting pipe (21) is communicated with the top on the right side of the preheater A (111), and the bottom, located on the left side of the preheater A (111), of the first air inlet pipe (5) is communicated with a degassing pipe (22).

4. The energy-saving and consumption-reducing CO2 production device according to claim 1, wherein: the heat recycling system comprises three recycling heat exchange devices, and the three recycling heat exchange devices are uniformly distributed at equal intervals in the horizontal direction.

5. The energy-saving and consumption-reducing CO2 production device according to claim 1, wherein: and 150mm silicate heat-insulating coating is coated on the outer surface of each communicating pipeline.

6. The energy-saving and consumption-reducing CO2 production device according to claim 1, wherein: the number of the baffles in the preheater A (111) and the preheater B (112) is sixteen, and the number of the baffles in the dealkylation preheater (2) is four.

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