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A new type of internal energy integrated rectification column system supporting device and method

A technology of internal energy and rectification tower, which is applied in the field of rectification tower, can solve the problems of high operating cost, close boiling point of rectification separation, high energy consumption, etc., and achieve the effect of cost saving, energy saving and increase of heat exchange area

Active Publication Date: 2021-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the existing rectification separation with similar boiling points, high operating costs, large energy consumption, and how to couple the high-pressure rectification section and the atmospheric pressure stripping section together, and provide a new type of integrated internal energy Distillation column and method

Method used

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  • A new type of internal energy integrated rectification column system supporting device and method
  • A new type of internal energy integrated rectification column system supporting device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The rectification tower separates the BTX substance system benzene and toluene, adopts the process described in the present invention, and the top feed of the rectification tower stripping section with internal energy integration is characterized by 100kg / hr of benzene and toluene feed mass flow rate, and 100kg / hr of toluene feed mass flow rate 100kg / hr, saturated liquid feed, the feed pressure is 1 bar, the number of theoretical plates in the rectification section is 10, the working pressure is 4 bar, the working pressure of the stripping section is 1 bar, the working pressure is 1 bar, and the feeding position is the internal energy integration refining The first tray in the stripping section of the distillation tower has a reflux ratio of 1.16, a gas temperature at the top of the tower of 90°C, and after compression, its pressure is 4 bar, and the outlet temperature of the compressor is 145°C. When the device starts up, the heat load of the heat exchanger at the botto...

Embodiment 2

[0036] Overall flow process is identical with embodiment 1, but difference is: benzene and toluene feed mass flow rate 1000 kg / hr, toluene feed mass flow rate 1000kg / hr, saturated liquid feed, feed pressure is 1bar, rectifying section theory The number of plates is 10, the working pressure is 5 bar, the working pressure of the stripping section is 1 bar, the working pressure is 1 bar, the feed position is the first tray of the stripping section of the internal energy integrated rectification tower, the reflux ratio is 0.986, and the gas temperature at the top of the tower is After compression, its pressure is 5bar, and the outlet temperature of the compressor is 155°C. When the device starts up, the heat load of the heat exchanger at the bottom of the tower is 145KW / hr, the power of the compressor is 105.2kw, and the latent heat of steam condensation at the top of the tower is 120.6KW. The heat flux exchanged by each theoretical plate is 730.86kcal / hr.m 2 .k Under the same se...

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Abstract

The invention relates to a novel rectification tower system with internal energy integration, including a raw material preheater, a tower top condenser, a start-up heater, a tower bottom heat exchanger, a rectification tower, a compressor, a tower top reflux tank, a tower Bottom buffer tank, reflux pump, tower bottom extraction pump, tower bottom throttling valve, among which the energy integrated rectification tower is composed of N tower sections coaxially sealed and connected, N≥1; Stripping section and rectifying section; this rectifying tower device adopts a composite coupling structure, which makes the rectifying section and stripping section coupled together, which strengthens the effect of mass transfer and heat transfer, and reduces the theoretical design of the rectifying tower. The height saves the cost. Between the downcomer and the tube bundle, the heat exchange area of ​​the rectification section and the stripping section is increased, the heat exchange effect is enhanced, energy consumption is saved, the operation is simple, safe and reliable.

Description

technical field [0001] The patent of the invention relates to a new rectification tower with integrated internal energy, which belongs to the technical field of petroleum and chemical industry. Background technique [0002] Distillation technology is the most widely used unit operation in the chemical industry. Although it has many advantages, it is also a part of high energy consumption and investment in industrial processes. more than half. Conventional distillation towers take heat from the top condenser and supply heat to the bottom reboiler at the same time. Usually, the heat taken by the top condenser is about 90% of the heat added to the bottom reboiler. Energy utilization Very unreasonable, ordinary rectification device consumes a lot of energy. Internally Heat Integrated Distillation Column (HIDiC for short) is a new type of distillation technology that has been actively researched internationally in recent years. It combines the energy-saving features of heat pum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/32B01D3/14B01D3/42
CPCB01D3/14B01D3/32B01D3/324B01D3/42Y02P20/10
Inventor 李凭力刘宏李英栋赵雅静
Owner CHINA PETROLEUM & CHEM CORP
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