Industrial naphthalene vaporization condensation cooler and working method thereof

Abstract

The present invention relates to an industrial naphthalene vaporization condensation cooler and a working method thereof. The industrial naphthalene vaporization condensation cooler comprises an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; a connecting part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition is arranged in the connecting part, a connecting hole is arranged on the partition, and an exhaust cap is arranged at the connecting hole. In the present invention, the water vapor condensation cooler adopts an air condensation cooler to replace a conventional circulating water condensation cooler, effectively reducing the amount of circulating water, thereby achieving the purpose of energy saving.

Description

Technical Field

[0001] The invention relates to the technical field of industrial naphthalene distillation, in particular to an industrial naphthalene vaporization condensation cooler and a working method thereof. Background Art

[0002] Naphthalene is the main product of coal tar processing, accounting for about 10% to 12% of coal tar. It is an important basic raw material for organic chemical industry and is widely used in the production of dyes, medicines and other products. Naphthalene produced from coal tar includes industrial naphthalene and refined naphthalene. The crystallization point of industrial naphthalene is not less than 78℃, and the naphthalene content is ≥95%. The crystallization point of refined naphthalene is not less than 79.6℃, and the naphthalene content of refined naphthalene is ≥99%. The separation and refining of naphthalene is an important link in the coal tar processing process and an important way to obtain naphthalene. At present, industrial naphthalene distillation is the conventional method for producing industrial naphthalene.

[0003] The distillation of industrial naphthalene is divided into three process routes: vacuum distillation, atmospheric distillation and pressure distillation. Since the crystallization point of industrial naphthalene is not lower than 78°C, in order to prevent industrial naphthalene from crystallizing during the cooling process, industrial naphthalene products usually choose industrial naphthalene vaporization condensation cooler as the cooling equipment.

[0004] The industrial naphthalene vaporization condensation cooler consists of two parts, the upper part is a water vapor condensation cooler, and the lower part is an industrial naphthalene condensation cooler. During the cooling process of the industrial naphthalene in the lower part, water is heated and vaporized, and the water vapor enters the water vapor condensation cooler in the upper part and is condensed and cooled into condensate by circulating water, and returns to the lower part, forming a closed-loop circulation of water and water vapor. The industrial naphthalene is equivalent to being cooled by hot water, and no crystallization will occur and blockage will occur.

[0005] The water vapor condensation cooler on the top of the industrial naphthalene vaporization condensation cooler uses circulating water as the cooling medium. Since the cooling object of the industrial naphthalene vaporization condensation cooler is the industrial naphthalene vapor coming out of the top of the industrial naphthalene distillation tower, it is usually arranged at the top of the frame. Therefore, an air condensation cooler can also be selected for condensation cooling of water vapor, which can save a certain amount of circulating water. It can be selected or used as a backup in the northern region. Using air cooling instead of water cooling is also an important measure for northern production enterprises to achieve energy saving. Summary of the invention

[0006] The invention provides an industrial naphthalene vaporization condensation cooler and a working method thereof. The water vapor condensation cooler adopts an air condensation cooler to replace a conventional circulating water condensation cooler, thereby effectively reducing the amount of circulating water, thereby achieving the purpose of energy saving.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An industrial naphthalene vaporization condensation cooler comprises an air condensation cooler arranged at an upper part and an industrial naphthalene condensation cooler arranged at a lower part; a communication part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition is arranged in the communication part, a communication hole is arranged on the partition, and an exhaust cap is arranged at the communication hole; the industrial naphthalene condensation cooler is a shell and tube condensation cooler, comprising a shell, a heat exchange tube, an upper tube plate and a lower tube plate, a plurality of heat exchange tubes are vertically arranged in the shell, the upper end of the heat exchange tube is connected to the shell through the upper tube plate, and the lower end of the heat exchange tube is connected to the shell through the lower tube plate; a naphthalene vapor inlet is arranged on one side of the upper part of the shell, and a naphthalene oil outlet is arranged on the other side of the lower part of the shell; a supplementary water inlet is arranged on one side of the communication part below the partition.

[0009] The industrial naphthalene condensation cooler also includes a lower tube box; the space between the upper tube plate and the partition is equivalent to the upper tube box; a steam condensate outlet is provided on one side of the connecting portion above the partition, and a steam condensate inlet is provided on the same side of the lower tube box, and the steam condensate outlet and the steam condensate inlet are connected through a steam condensate drain pipe; a vent pipe is provided at the lower part of the other side of the lower tube box, and an inclined plate is provided at the bottom of the lower tube box, and an end of the inclined plate corresponding to the steam condensate inlet is higher than an end corresponding to the vent pipe.

[0010] An exhaust hole is arranged on one side of the upper part of the shell of the industrial naphthalene condensation cooler, and a steam purge pipe is arranged on the other side of the lower part.

[0011] The shell-and-tube condenser cooler is a fixed tube sheet type steam-water heat exchanger, wherein the upper tube sheet is connected to the connecting portion via a flange, and the lower tube sheet is connected to the lower tube box via a flange.

[0012] The air condensing cooler is composed of an upper air collecting shell and a plurality of fin tubes. Two exhaust holes are arranged on the top of the upper air collecting shell. The bottom of the upper air collecting shell is connected with the top of each fin tube. The space between the fin tube and the partition is equivalent to the lower air collecting shell. The bottom end of each fin tube is connected with the lower air collecting shell.

[0013] A working method of an industrial naphthalene vaporization condensation cooler, comprising:

[0014] 1) In the industrial naphthalene condenser cooler, hot water flows through the tube side, and industrial naphthalene flows through the shell side; naphthalene vapor at 200-240° C. enters from the naphthalene vapor inlet at the upper part of the shell, exchanges heat with the hot water at 80-100° C. in the tube side, and is condensed and cooled into liquid industrial naphthalene, which flows out from the naphthalene oil outlet at the lower part of the shell; the hot water in the tube side is vaporized after heat exchange, and the water vapor flows upward into the connecting part, and enters the air condenser cooler above after passing through the exhaust cap;

[0015] 2) After the water vapor enters the air condensation cooler, it exchanges heat with the air in a plurality of finned tubes, is condensed and cooled by the air into steam condensate, falls on the baffle below, passes through the steam condensate outlet, through the steam condensate drain pipe, enters the lower tube box from the steam condensate inlet, and enters the tube process of the industrial naphthalene condensation cooler;

[0016] 3) In the air condensation cooler and industrial naphthalene condensation cooler, water and water vapor form a closed loop.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The water vapor condensation cooler uses an air condensation cooler instead of a conventional circulating water condensation cooler, effectively reducing the amount of circulating water, thereby achieving the purpose of energy saving;

[0019] 2) The upper air condensation cooler and the lower industrial naphthalene condensation cooler are separated by a partition, and an exhaust cap is provided on the partition to allow water vapor to pass through and prevent the condensate from flowing back;

[0020] 3) A make-up water inlet is provided for adding boiler feed water before starting work, exhaust hole 1 and exhaust hole 2 are provided for discharging non-condensable gases from corresponding parts, and a vent pipe is provided for venting boiler feed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an industrial naphthalene vaporization condensation cooler according to the present invention.

[0022] In the figure: 1. Naphthalene vapor inlet 2. Naphthalene oil outlet 3. Exhaust cap 4. Steam condensate outlet 5. Steam condensate inlet 6. Steam purge pipe 7. Exhaust hole 1 8. Exhaust hole 2 9. Vent pipe 10. Fin tube 11. Heat exchange tube 12. Partition 13. Upper tube sheet 14. Lower tube sheet 15. Steam condensate drain pipe 16. Make-up water inlet DETAILED DESCRIPTION

[0023] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0024] like Figure 1 As shown, an industrial naphthalene vaporization condensation cooler of the present invention comprises an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; a communication part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition 12 is arranged in the communication part, a communication hole is arranged on the partition 12, and an exhaust cap 3 is arranged at the communication hole; the industrial naphthalene condensation cooler is a shell and tube condensation cooler, comprising a shell, a heat exchange tube 11, an upper tube plate 13 and a lower tube plate 14, a plurality of heat exchange tubes 11 are vertically arranged in the shell, the upper end of the heat exchange tube 11 is connected to the shell through the upper tube plate 13, and the lower end of the heat exchange tube 11 is connected to the shell through the lower tube plate 14; a naphthalene vapor inlet 1 is arranged on one side of the upper part of the shell, and a naphthalene oil outlet 2 is arranged on the other side of the lower part of the shell; a make-up water inlet 16 is arranged on one side of the communication part below the partition 12.

[0025] The industrial naphthalene condensation cooler also includes a lower tube box; the space between the upper tube plate 13 and the partition 12 is equivalent to the upper tube box; a steam condensate outlet 4 is provided on one side of the connecting portion above the partition 12, and a steam condensate inlet 5 is provided on the same side of the lower tube box, and the steam condensate outlet 4 and the steam condensate inlet 5 are connected through a steam condensate drain pipe 15; a vent pipe 9 is provided at the lower part of the other side of the lower tube box, and an inclined plate is provided at the bottom of the lower tube box, and the end of the inclined plate corresponding to the steam condensate inlet 5 is higher than the end of the corresponding vent pipe 9.

[0026] An exhaust hole 7 is arranged on one side of the upper part of the shell of the industrial naphthalene condenser cooler, and a steam purge pipe 6 is arranged on the other side of the lower part.

[0027] The shell-and-tube condenser cooler is a fixed tube sheet type steam-water heat exchanger, wherein the upper tube sheet 13 is connected to the connecting portion via a flange, and the lower tube sheet 14 is connected to the lower tube box via a flange.

[0028] The air condensing cooler is composed of an upper air collecting shell and a plurality of fin tubes 10. An exhaust hole 8 is provided at the top of the upper air collecting shell. The bottom of the upper air collecting shell is connected to the top of each fin tube 10. The space between the fin tube 10 and the partition 12 is equivalent to the lower air collecting shell. The bottom end of each fin tube 10 is connected to the lower air collecting shell.

[0029] The working method of the industrial naphthalene vaporization condensation cooler of the present invention comprises:

[0030] 1) In the industrial naphthalene condenser cooler, hot water flows through the tube side, and industrial naphthalene flows through the shell side; naphthalene vapor at 200-240° C. enters from the naphthalene vapor inlet 1 at the upper part of the shell, exchanges heat with the hot water at 80-100° C. in the tube side, and is condensed and cooled into liquid industrial naphthalene, which flows out from the naphthalene oil outlet 2 at the lower part of the shell; the hot water in the tube side is vaporized after heat exchange, and the water vapor enters the connecting part upward, and enters the air condenser cooler above after passing through the exhaust cap 3;

[0031] 2) After the water vapor enters the air condensation cooler, it exchanges heat with the air in the multiple fin tubes 10, is condensed and cooled by the air into steam condensate, falls on the baffle 12 below, passes through the steam condensate outlet 4, through the steam condensate drain pipe 15, enters the lower pipe box from the steam condensate inlet 5, and enters the pipe process of the industrial naphthalene condensation cooler;

[0032] 3) In the air condensation cooler and industrial naphthalene condensation cooler, water and water vapor form a closed loop.

[0033] In the industrial naphthalene condensation cooler, the height of the hot water level used for heat exchange is determined by the full flow height of the process pipeline.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An industrial naphthalene vaporization condensation cooler, characterized in that: The invention comprises an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; a communication part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition is arranged in the communication part, a communication hole is arranged on the partition, an exhaust cap is arranged at the communication hole, and a supplementary water inlet is arranged on one side of the communication part below the partition; the industrial naphthalene condensation cooler is a shell and tube condensation cooler, comprising a shell, a heat exchange tube, an upper tube plate and a lower tube plate, a plurality of heat exchange tubes are vertically arranged in the shell, the upper end of the heat exchange tube is connected to the shell through the upper tube plate, and the lower end of the heat exchange tube is connected to the shell through the lower tube plate; a naphthalene vapor inlet is arranged on one side of the upper part of the shell, and a naphthalene oil outlet is arranged on the other side of the lower part of the shell; an exhaust hole is arranged on one side of the upper part of the shell, and a steam purge pipe is arranged on the other side of the lower part; the industrial naphthalene condensation cooler The condenser cooler also includes a lower tube box; the space between the upper tube plate and the partition is equivalent to the upper tube box; a steam condensate outlet is provided on one side of the connecting part above the partition, and a steam condensate inlet is provided on the same side of the lower tube box, and the steam condensate outlet and the steam condensate inlet are connected through a steam condensate drain pipe; a vent pipe is provided at the lower part of the other side of the lower tube box, and an inclined plate is provided at the bottom of the lower tube box, and one end of the inclined plate corresponding to the steam condensate inlet is higher than one end of the corresponding vent pipe; the air condenser cooler is composed of an upper air collecting shell and a plurality of fin tubes, and two exhaust holes are provided at the top of the upper air collecting shell, and the bottom of the upper air collecting shell is connected to the top of each fin tube, and the space between the fin tube and the partition is equivalent to the lower air collecting shell, and the bottom end of each fin tube is connected to the lower air collecting shell.

2. An industrial naphthalene vaporization condensation cooler according to claim 1, characterized in that: The shell-and-tube condenser cooler is a fixed tube sheet type steam-water heat exchanger, wherein the upper tube sheet is connected to the connecting portion via a flange, and the lower tube sheet is connected to the lower tube box via a flange.

3. A method for operating the industrial naphthalene vaporization condensation cooler as claimed in claim 1, characterized in that: include: 1) In the industrial naphthalene condenser cooler, hot water flows through the tube side, and industrial naphthalene flows through the shell side; naphthalene vapor at 200-240° C. enters from the naphthalene vapor inlet at the upper part of the shell, exchanges heat with the hot water at 80-100° C. in the tube side, and is condensed and cooled into liquid industrial naphthalene, which flows out from the naphthalene oil outlet at the lower part of the shell; the hot water in the tube side is vaporized after heat exchange, and the water vapor flows upward into the connecting part, and enters the air condenser cooler above after passing through the exhaust cap; 2) After the water vapor enters the air condensation cooler, it exchanges heat with the air in a plurality of finned tubes, is condensed and cooled by the air into steam condensate, falls on the baffle below, passes through the steam condensate outlet, through the steam condensate drain pipe, enters the lower tube box from the steam condensate inlet, and enters the tube process of the industrial naphthalene condensation cooler; 3) In the air condensation cooler and industrial naphthalene condensation cooler, water and water vapor form a closed loop.

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