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Method and device for recycling C4 by-product obtained in gasoline production

A production device and by-product technology, which is applied in the field of C4 by-product recycling devices obtained from gasoline production, can solve problems that affect the acquisition of gasoline production devices, cannot obtain sufficient reaction, reduce the actual conversion rate of raw materials, etc., and achieve reduction in processing costs, The effect of reducing energy consumption and improving conversion rate

Pending Publication Date: 2017-12-29
WUHAN KAISHUN PETROCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

40-50% of these unconverted C4 components are alkane structures, which cannot be fully reacted in gasoline unit reactors
The continuous accumulation of C4 components of these alkane structures in the raw material tank will affect the gasoline production unit to obtain more target products and reduce the actual conversion rate of raw materials

Method used

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  • Method and device for recycling C4 by-product obtained in gasoline production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Reference figure 1 , A device for recycling C4 by-products from gasoline production, including gasoline production device 1 and stabilization tower 2. The bottom end of stabilization tower 2 is equipped with a reboiler 11 to provide heat to stabilization tower 2; The top is equipped with a bleed air pipe 3, the end of the bleed pipe 3 is connected to the input end of the water cooler 4, the output end of the water cooler 4 is connected to the input end of the reflux tank 5 through a pipe, and the output end of the reflux tank 5 is provided with a return pipe 7, The reflux pipe 7 is provided with a reflux pump 6, and the reflux tank 5 is also connected to the cold box 10.

[0027] The return pipe 7 is divided into return branch pipe A 701, return branch pipe B 702, return branch pipe C 703, return branch pipe A 701 is connected to stabilization tower 2, return branch pipe B 702 is connected to the input end of C4 storage tank 9, and the output end of C4 storage tank 9 is co...

Embodiment 2

[0029] A method for reusing C4 by-products from gasoline production, the method steps are as follows:

[0030] S1: The C1-C12 by-products produced by the gasoline production device are separated into the stabilization tower. The temperature of the gasoline production device is 390°C and the pressure is 0.7MPa;

[0031] S2: C1-C4 by-products are output from the bleed air pipe at the top of the stabilization tower and enter the water cooler;

[0032] S3: The C1-C3 by-products output from the water cooler enter the cold box in a gaseous state, and the C4 by-products enter the return pipeline in a liquid state;

[0033] S4: The C4 by-products entering the reflux pipeline are respectively transported to the aromatization reaction device, C4 storage tank and stabilization tower for recycling, where the temperature of the aromatization reaction device is 490°C and the pressure is 0.5MPa.

Embodiment 3

[0035] A method for reusing C4 by-products from gasoline production, the method steps are as follows:

[0036] S1: The C1-C12 by-products produced by the gasoline production unit are separated into the stabilization tower. The temperature of the gasoline production unit is 420°C and the pressure is 0.7MPa;

[0037] S2: C1-C4 by-products are output from the bleed air pipe at the top of the stabilization tower and enter the water cooler;

[0038] S3: The C1-C3 by-products output from the water cooler enter the cold box in a gaseous state, and the C4 by-products enter the return pipeline in a liquid state;

[0039] S4: The C4 by-products entering the reflux pipeline are respectively transported to the aromatization reaction device, C4 storage tank and stabilization tower for recycling, wherein the temperature of the aromatization reaction device is 530°C and the pressure is 0.5MPa.

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Abstract

The invention discloses a method and a device for recycling a C4 by-product obtained in gasoline production. The device comprises a gasoline production device and a stabilizer and is characterized in that a gas guide pipeline is arranged at the top of the stabilizer, the tail end of the gas guide pipeline is connected with an input end of a water cooler, an output end of the water cooler is connected with an input end of a reflux tank through a pipeline, an output end of the reflux tank is provided with a reflux pipeline, and a separated C4 component is delivered to the stabilizer, a C4 storage tank and an aromatization reaction device respectively. Continuous accumulation, in a raw material tank area, of unconverted alkane C4 component in the gasoline production device is reduced, the conversion rate of C4 component raw materials used by the gasoline production device is increased, the C4 component conversion rate is increased from 55-65% to 75-80%, energy consumption in unconverted C4 component separation is reduced, and accordingly processing cost is reduced.

Description

Technical field [0001] The present invention relates to the technical field of chemical industry, in particular to a device and method for reusing C4 by-products obtained from gasoline production. Background technique [0002] The existing gasoline production equipment uses C4 liquefied gas and low-sulfur naphtha as raw materials. After the reaction, the raw materials are not 100% converted into the target product. The unconverted C4 component accounts for about 35-45 of the C4 component feed amount. %. 40-50% of these unconverted C4 components are of alkane structure, which cannot be fully reacted in the gasoline plant reactor. These C4 components of alkane structure continue to accumulate in the raw material tank, which will affect the gasoline production device to obtain more target products and reduce the actual conversion rate of the raw material. Summary of the invention [0003] Based on the technical problems existing in the background art, the present invention proposes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/68C10G53/02B01J19/24B01J8/00
CPCB01J8/00B01J19/24C10G45/68C10G53/02C10G2300/1037
Inventor 王小进姚小军
Owner WUHAN KAISHUN PETROCHEM TECH CO LTD
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