Matching device and method of novel rectifying tower system with internal energy integration

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

Active Publication Date: 2019-08-30
TIANJIN UNIV
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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 ho

Method used

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  • Matching device and method of novel rectifying tower system with internal energy integration
  • Matching device and method of novel rectifying tower system with internal energy integration

Examples

Experimental program
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Example Embodiment

[0033] Example 1

[0034] The rectification tower separates benzene and toluene from the BTX system, adopts the process of the present invention, and the top feed of the rectification section of the rectification tower with internal energy integration is characterized by a mass flow rate of benzene and toluene feed of 100kg / hr and a mass flow rate of toluene feed. 100kg / hr, saturated liquid feed, the feed pressure is 1bar, the number of theoretical plates in the rectification section is 10, the working pressure is 4bar, the working pressure of the stripping section is 1bar, the working pressure is 1bar, and the feed position is the internal energy integration precision The first tray in the stripping section of the distillation column has a reflux ratio of 1.16 and a top gas temperature of 90°C. After compression, its pressure is 4 bar and the compressor outlet temperature is 145°C. When the device is started, the heat load of the heat exchanger at the bottom of the tower is 17.3...

Example Embodiment

[0035] Example 2

[0036] The overall process is the same as Example 1, but the difference is: benzene and toluene feed mass flow rate is 1000 kg / hr, toluene feed mass flow rate is 1000 kg / hr, saturated liquid feed, feed pressure is 1 bar, rectification section theory The number of plates is 10, the working pressure is 5bar, the working pressure of the stripping section is 1bar, the working pressure is 1bar, the feed position is the first plate of the stripping section of the internal energy integrated distillation column, the reflux ratio is 0.986, and the temperature of the top gas After compression, the pressure is 5bar and the compressor outlet temperature is 155℃. When the device is started, 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 condensation of the vapor 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 sa...

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Abstract

The invention relates to a novel rectifying tower system with internal energy integration. The rectifying tower system comprises a raw material preheater, a tower top condenser, a starting heater, a tower bottom heat exchanger, a rectifying tower, a compressor, a tower top reflux tank, a tower bottom buffer tank, a reflux pump, a tower bottom extraction pump and a tower bottom throttling valve; the energy integration rectifying tower is formed by coaxially connecting N tower sections in a sealing mode, wherein N is larger than or equal to 1; and a stripping section and a rectifying section which are in airtight separation with each other are formed in each tower section. The rectifying tower device is of a composite coupling structure, and then the rectifying sections and the stripping sections are coupled together, so that the effects of mass transfer and heat transfer are enhanced, the theoretically designed rectifying tower height is reduced, and cost is saved. The heat exchange area of the rectifying sections and the stripping sections is increased between a liquid descending pipe and a pipe bundle, the heat exchange effect is enhanced, energy consumption is saved, operation issimple, and safety and reliability are achieved.

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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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 TIANJIN UNIV
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