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Heavy feed mixer

A feed and mixture technology, applied in chemical instruments and methods, separation methods, hydrocarbon oil treatment products, etc., can solve problems such as increasing capital costs

Active Publication Date: 2012-09-05
STONE & WEBSTER PROCESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device requires a very long evaporation length to substantially completely evaporate the hydrocarbon feed
This increases capital cost and requires a valuable piece of space within the convection section of the furnace

Method used

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Embodiment Construction

[0038] The above and other objects of the present invention will appear in the following description and illustrated embodiments, which are described in detail with reference to the accompanying drawings. Similar elements in each figure are denoted by similar reference numerals, and therefore the following detailed description may be omitted for brevity.

[0039] In one embodiment, the present invention relates to an improved heavy feed mixer (1), as attached figure 1 Shown in. The heavy feed mixer (1) can be located in the convection section of the furnace or outside the furnace, and is in fluid communication with the convection section of a conventional pyrolysis furnace, and is designed to receive a mixture including hydrocarbon feed and dilution steam The two-phase liquid vapor mixture. After the mixture passes through the heavy feed mixer (1), substantially all / completely vaporized hydrocarbon feed fluid is output and sent to the radiant heating section for pyrolysis and cr...

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Abstract

An apparatus designed to completely vaporize an intake of heavy hydrocarbon feedstock is described. The apparatus, a so-called heavy feed mixer, is comprised of pipes being disposed coaxially about a common longitudinal axis. The inner tubular section delivers a two-phase liquid-vapor mixture of hydrocarbon feedstock and dilution steam to the apparatus. The converging / diverging tubular section has a unique structure which converges to a throat section and then diverges to an outlet section. The converging section directs a uniform shroud of superheated steam onto the hydrocarbon stream delivered by the inner tubular section. Impingement of the superheated steam with the intake stream initiates mixing and further vaporization within the throat section. The mixture traverses the converging / diverging tubular section and passes into the outlet section where vaporization is completed. The completely vaporized stream is directed out of the apparatus for further processing downstream.

Description

Technical field [0001] The present invention generally relates to an apparatus and method for vaporizing heavy hydrocarbon feedstock. In particular, the present invention relates to a device and method for substantially completely vaporizing heavy hydrocarbon feed mixed with steam. The invention also relates to the use of the device and method in the production of gas-liquid products, such as olefins from heavy hydrocarbon feeds. Background technique [0002] Thermal cracking for converting hydrocarbon feedstocks into more useful gas-liquid by-products is a well-known method. The fission process, also known as pyrolysis, breaks the carbon-carbon bonds in longer hydrocarbons to form shorter chain hydrocarbons. The overall reaction rate and the final product depend on the processing temperature, pressure and residence time. Thermal cracking is commonly used to produce olefins, such as ethylene, propylene, or butene, from many types of relatively light hydrocarbon feedstocks, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/14C10G9/36
CPCC10G9/40B01B1/06C10G2300/1033C10G2300/1074C10G2300/807C10G9/14C10G2400/20B01D1/14
Inventor W·A·拉森G·E·小达布尼J·R·墨菲三世K·J·小非尤尔王泳
Owner STONE & WEBSTER PROCESS TECH
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