CN212770513U

CN212770513U - Coal-to-ethylene glycol double-tower parallel heat recovery device

Info

Publication number: CN212770513U
Application number: CN202021450606.2U
Authority: CN
Inventors: 樊云龙; 王磊; 刘玉刚; 肖俊磊; 刘京; 郝富强; 荣庆聪; 贺丛
Original assignee: Puyang Yongjin Chemical Co ltd
Current assignee: Puyang Yongjin Chemical Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-03-23
Anticipated expiration: 2030-07-21

Abstract

A coal-to-ethylene-glycol double-tower parallel heat energy recovery device is a coal-to-ethylene-glycol rectification technology and solves the problems in the prior art, and comprises a dealcoholization tower, a heavy component discharge pump, a deesterification tower, a first condenser, a product rectification tower, a second condenser, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a gas phase extraction pipeline, wherein a heavy component kettle liquid pump is connected to a liquid outlet of a tower kettle of the dealcoholization tower; the heavy component kettle liquid pump is connected with the first condenser through a first pipeline, and the heavy component kettle liquid pump is connected with the second condenser through a second pipeline; the first condenser is connected with the deesterification tower through a sixth pipeline; the second condenser is connected with the product rectifying tower through a fifth pipeline; the dealcoholization tower is connected with the first condenser through a third pipeline; the second condenser is connected to the third tube by a fourth line.

Description

Coal-to-ethylene glycol double-tower parallel heat recovery device

Technical Field

The utility model relates to a coal system ethylene glycol rectification technology, especially the parallelly connected heat recovery unit of coal system ethylene glycol double tower.

Background

The rectification process is a complex process accompanied with heat transfer and mass transfer, is widely applied to the fields of petrochemical industry, fine chemical industry and the like, is a main energy consumption link in chemical production, and has the characteristics of multiple variables, complex mechanism and the like. According to statistics of relevant data, 40% -70% of energy consumption is used in the separation process in the chemical production process, and 95% of energy consumed by rectification is occupied. Under the condition of energy shortage at present, the research on the energy-saving technology in the rectification process has important social and practical significance. In the prior art, gas phase at the top of a rectifying tower is extracted through a gas phase extraction port and then is output after being cooled by a circulating water or chilled water condenser, and materials in a feeding pipeline are usually fed into the rectifying tower at a normal temperature and can be rectified only by heating the inside of the rectifying tower to a certain temperature. The condensation of the gas phase at the top of the tower needs to consume a certain cooling medium, and the feeding needs to consume a large amount of heat energy for temperature increase.

Disclosure of Invention

The utility model aims at providing a coal-based ethylene glycol double-tower parallel heat recovery device and an application method, which solve the problems of the prior art, and the utility model aims at realizing the purposes of the device and the method, which comprises a dealcoholization tower, a heavy component discharge pump, a deesterification tower, a first condenser, a product rectifying tower, a second condenser, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline, wherein the heavy component discharge pump is connected to the liquid outlet of the tower kettle of the dealcoholization tower; the heavy component discharge pump is connected with the first condenser through a first pipeline, and the heavy component discharge pump is connected with the second condenser through a second pipeline; the first condenser is connected with the deesterification tower through a sixth pipeline; and the second condenser is connected with the product rectifying tower through a fifth pipeline.

The dealcoholization tower is connected with the first condenser through a third pipeline; the second condenser is connected to the third tube by a fourth line.

The utility model discloses an application method, the material that comes out from the dealcoholization tower passes through the heavy ends discharge pump and inputs first condenser through the first pipeline, passes through the heavy ends discharge pump and inputs the second condenser through the second pipeline; inputting materials of the deesterification tower into a first condenser for condensation through a gas-phase extraction pipeline; the material of the product rectifying tower is input into a second condenser through a fifth pipeline for condensation; the material condensed by the first condenser is input into the dealcoholization tower through a third pipeline, and the material condensed by the second condenser is input into the third pipeline through a fourth pipeline and enters into the dealcoholization tower together.

The utility model discloses a few parameters, dealcoholize tower ejection of compact temperature 50-60 ℃, the condenser shell side temperature at the top of the dealcoholize tower 80-90 ℃, the condenser shell side temperature at the top of the product rectification tower 90-100 ℃, the hot cauldron material temperature of dealcoholize tower 90-95 DEG C

Further, the liquid pump lift and the flow of the heavy component kettle liquid connected with the kettle liquid outlet of the dealcoholization tower completely meet the heat exchange requirements of the two condensers.

Further, the temperature of the material in the liquid inlet pipeline of the dealcoholization tower meets the temperature required by the flash evaporation of the dealcoholization tower.

The invention has the beneficial effects that: after the materials in the cold kettle of the dealcoholization tower exchange heat with the condenser at the top of the product rectification tower through the dealcoholization tower, the temperature of the hot kettle is increased to 90-95 ℃, and about 10 tons of steam of 0.5Mpa is saved per hour under the full load state; the de-esterification tower and the condenser at the top of the product rectification tower can save a large amount of circulating water; the rectification device is provided with the double-tower parallel heat exchange system, so that the heat energy can be recycled, the energy is saved, and the production cost is reduced.

The invention has the beneficial effects that: after the materials in the cold kettle of the dealcoholization tower are subjected to heat exchange through the dealcoholization tower and a condenser at the top of the product rectification tower, the temperature of the hot kettle is increased to 90-95 ℃, and about 10 tons of steam of 0.5Mpa is saved per hour under the full load state. The deesterification tower and the product rectification tower top condenser can save a large amount of circulating water. The rectification device is provided with the double-tower parallel heat exchange system, so that the heat energy can be recycled, the energy is saved, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a coal-to-ethylene glycol double-tower parallel heat recovery device.

In the figure, the device comprises a dealcoholization tower 1, a dealcoholization tower 2, a heavy component discharge pump 3, a deesterification tower 4, a first condenser 5, a product rectification tower 6, a second condenser 7, a first pipeline 8, a second pipeline 9, a third pipeline 10, a fourth pipeline 11, a fifth pipeline 12 and a sixth pipeline.

Detailed Description

Embodiment 1, the utility model discloses a dealcoholization tower 1, heavy ends discharge pump 2, deesterification tower 3, first condenser 4, product rectifying column 5, second condenser 6, first pipeline 7, second pipeline 8, third pipeline 9, fourth pipeline 10, fifth pipeline 11, sixth pipeline 12, be connected with heavy ends discharge pump 2 on the dealcoholization tower 1 liquid outlet; the heavy component discharging pump 2 is connected with the first condenser 4 through a first pipeline 7, and the heavy component discharging pump 2 is connected with the second condenser 6 through a second pipeline 8; the first condenser 4 is connected with the deesterification tower 3 through a sixth pipeline 12; the second condenser 6 is connected with the product rectifying tower 5 through a fifth pipeline 11;

example 2, the dealcoholization column 1 was connected to the first condenser 4 by a third line 9; the second condenser 6 is connected to a third line 9 by a fourth line 10.

Embodiment 3, the utility model discloses an application method, the material that comes out from the dealcoholization tower 1 is input into the first condenser 4 through the heavy ends discharge pump 2 through the first pipeline 7, is input into the second condenser 6 through the heavy ends discharge pump 2 through the second pipeline 8; the material of the deesterification tower 3 is input into the first condenser 4 through a sixth pipeline 12 for condensation; the material of the product rectifying tower 5 is input into a second condenser 6 through a fifth pipeline 11 for condensation; the material condensed by the first condenser 4 is fed into the dealcoholization tower 1 through a third line 9, while the material condensed by the second condenser 6 is fed into the third line 9 through a fourth line 10 and fed into the dealcoholization tower 1 together.

Claims

1. Double-tower parallel heat energy recovery device for coal-to-ethylene glycol, comprising a dealcoholization tower (1), a heavy component discharge pump (2), a deesterification tower (3), a first condenser (4), a product rectifying tower (5), a second condenser (6), a first pipeline (7), a second pipeline (8), a third pipeline (9), a fourth pipeline (10), a fifth pipeline (11) and a sixth pipeline (12), and is characterized in that: a heavy component discharging pump (2) is connected to a liquid outlet of the dealcoholization tower (1); the heavy component discharge pump (2) is connected with the first condenser (4) through a first pipeline (7), and the heavy component discharge pump (2) is connected with the second condenser (6) through a second pipeline (8); the first condenser (4) is connected with the deesterification tower (3) through a sixth pipeline (12); and the second condenser (6) is connected with the product rectifying tower (5) through a fifth pipeline (11).

2. The coal-to-ethylene glycol double-tower parallel heat recovery device of claim 1, which is characterized in that: the dealcoholization tower (1) is connected with the first condenser (4) through a third pipeline (9); the second condenser (6) is connected to the third line (9) by a fourth line (10).