Reinforced mass transfer and efficient energy-saving type absorption stabilizing system

An absorption stabilization system, energy-saving technology, applied in the petroleum industry, hydroprocessing process, hydrocarbon oil treatment, etc., can solve the problem of reducing the energy consumption of the absorption stabilization system, and achieve the goal of reducing energy consumption, heat load, and load reduction Effect

Inactive Publication Date: 2011-04-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although researchers have proposed many modification schemes for the absorption stabilization system, there is still a certain potential in reducing the energy consumption of the absorption stabilization system and enhancing mass transfer.

Method used

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  • Reinforced mass transfer and efficient energy-saving type absorption stabilizing system
  • Reinforced mass transfer and efficient energy-saving type absorption stabilizing system
  • Reinforced mass transfer and efficient energy-saving type absorption stabilizing system

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this example, the absorption stabilization system of a 1.4Mt / a catalytic cracking unit in a petrochemical enterprise is used for calculation. The process flow is as follows figure 1 Shown: the flow rate of compressed rich gas is 46.2t / h, and the flow rate of naphtha is 65.8t / h. The compressed rich gas 1 is mixed with the absorption tower bottom oil 4 and then enters the circulating water cooler 7 with an outlet temperature of 60°C, and then enters the liquid separation tank 8 for gas-liquid separation. The liquid phase of the liquid separation tank is heated to 80°C by the heat exchanger 11 and enters the upper middle part of the desorption tower 15 as a hot feed. The heat exchanger 11 uses stable gasoline as a heat source. After the gas phase 6 of the liquid separation tank is mixed with the desorption gas 5, the temperature drops to 35°C through the circulating water cooler 9, and then enters the liquid separation tank 10 for gas-liquid separation, and the liquid p...

Embodiment 2

[0038] The absorption and stabilization system of a 1.0Mt / a delayed coking unit in a petrochemical enterprise is used for accounting. The process flow is as follows figure 1 As shown, the specific process flow of this example is the same as that of Example 1, and the operating conditions are: the flow rate of compressed rich gas is 11.3t / h, the flow rate of naphtha is 20.7t / h, the outlet temperature of the circulating water cooler 7 is 60°C, and the circulating water cooler 9 The outlet temperature is 40°C, and the outlet temperature of the feed heat exchanger 11 of the desorption tower is 80°C. Same as Example 1, the process quality control index is C in deethanized gasoline 2 4 3 + Content<1.5%(v).

[0039] Under the same feed and product quality, the combined process of this example is combined with cold feed, hot feed, cold feed-intermediate reboiler, hot feed-intermediate reboiler, two-stage condensation-intermediate reboiler The five processes were compared and analyz...

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Abstract

The invention provides a reinforced mass transfer and efficient energy-saving type absorption stabilizing system. The invention relates to absorption stabilizing system production technologies such as catalytic cracking, delay coking, hydrocracking and the like, in particular to a compound reinforced technology of secondary condensation and middle reboiler arrangement for the absorption stabilizing system. In the invention, a technology that adsorption tower bottom oil and compressed rich gas are mixed for primary condensation and the primarily condensed gas is mixed with desorption gas for secondary condensation is adopted, thereby avoiding the mix of the desorption gas with the adsorption tower bottom oil and the compressed rich gas, reducing primary condensation load and reinforcing the mass transfer of stepwise condensation processes while eliminating backmixing of a desorption tower. Primary condensation liquid is heated and then fed, and the middle reboiler is arranged in the desorption tower, so that the load of the reboiler in the desorption tower can be effectively reduced. Compared with a cold feeding technology, a hot feeding technology, a cold feeding-middle reboiler technology, a hot feeding-reboiler technology and secondary condensation-middle reboiler technology, energy consumption can be respectively reduced by 25-34%, 18-26%, 16-24%, 7-13% and 6-8% by using the reinforced compound technology in the invention. The novel technology has the advantages of reinforcing the mass transfer of the absorption stabilizing system, reducing the energy consumption of the system and relieving the load in the tower.

Description

technical field [0001] The invention relates to a petroleum refining process, especially a composite process for absorbing and stabilizing systems such as catalytic cracking, delayed coking, and hydrocracking. Background technique [0002] Catalytic cracking, delayed coking and hydrocracking are currently important heavy oil lightening processing devices, and they are also important high-energy-consuming devices in refineries. The absorption and stabilization system is a post-processing device for catalytic cracking, delayed coking and hydrocracking. Its main task is to separate the crude gasoline and rich gas from the top of the fractionation tower into liquefied gas and stable gasoline, and at the same time obtain dry gas as a by-product. The product quality and energy consumption level of the absorption stabilization system are directly related to the economic benefits of catalytic cracking, delayed coking and hydrocracking units. [0003] At present, the domestic absorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/00
Inventor 魏志强张冰剑陈清林雷杨
Owner SUN YAT SEN UNIV
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