An energy-saving acrylic acid preparation method with two sets of oxidation and one set of refining
An acrylic acid and propylene technology, which is applied in the field of energy-saving acrylic acid preparation systems, can solve the problems of large use of steam in a refining unit, which is not conducive to energy saving, and the scale limitation of a single set of rectification devices, and achieves the effect of saving the amount of use.
Active Publication Date: 2015-12-30
TAIXING JURONG CHEM CO LTD
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Problems solved by technology
[0002] At present, in the field of acrylic acid preparation technology, the acrylic acid production unit is designed with a set of oxidation device and a set of refining unit. There is a problem that the volume of the oxidizer is limited by the production load of acrylic acid, and the scale of a single rectification device is limited.
And in the refining production process, the use of steam in the refining unit is large, which is not conducive to energy saving
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[0024] Example: such as figure 1 As shown, an energy-saving acrylic acid production system with two sets of oxidation and one set of refining. The acrylic acid unit is designed with two sets of oxidation devices and one set of refining unit. It is used for the first time in the production of acrylic acid, which solves the problem of the volume of the oxidizer on the production load of acrylic acid. , using two sets of 80,000 tons / year oxidation reactors and a set of 160,000 tons / year rectification device, forming the largest single-scale production device in China. Compared with one set of oxidation and one set of refining process, the two-to-one configuration is more conducive to energy saving. Under the condition of the same production volume, the use of steam in the refining unit is saved.
[0025] The acrylic acid production system is mainly composed of two sets of parallel first-stage oxidation system and second-stage oxidation system, and a set of acrylic acid separation...
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The invention discloses an energy-saving acyclic acid preparation system having two sets of oxidation devices and one set of refining unit, which mainly comprises two sets of parallelly-connected first-section oxidation system and second-section oxidation system and a set of acrylic acid separating and refining system. The preparation system is characterized in that the first-section oxidation system is composed of a first-section propylene evaporator, a first-section first reactor, a first-section second reactor, a first-section effluent cooler, a first-section absorption tower and a first-section stripping tower which are sequentially connected by a pipeline; the acrylic acid separating and refining system comprises a water separation tower system, a solvent recovery tower system, an exhaust gas deodorization tower system and a refining part, wherein the refining part comprises a light component removal tower system, an acetic acid separating tower system, a heavy component removal tower system and a maleic acid separating tower. The preparation method of acrylic acid comprises the steps of oxidation and acrylic acid separating and refining. The invention provides an energy-saving acyclic acid preparation system having two sets of oxidation devices and one set of refining unit, and an acyclic acid unit is designed by using two sets of oxidation devices in cooperation with one set of refining unit, so that the problem that the volume of an oxygenizer limits the acrylic acid production load is solved, the scale is relatively large, and the application amount of steam is saved.
Description
technical field [0001] The invention relates to the technical field of acrylic acid preparation, in particular to an energy-saving acrylic acid preparation system with two sets of oxidation and one set of refining and its method. Background technique [0002] At present, in the field of acrylic acid preparation technology, the acrylic acid production unit is designed with a set of oxidation device and a set of refining unit. There is a problem that the volume of the oxidizer is limited by the production load of acrylic acid, and the scale of a single rectification device is limited. And in the refined production process, the use of steam in the refining unit is large, which is not conducive to energy saving. Therefore, there is a need for a system and method for producing acrylic acid that increases the scale of a rectification unit and saves energy. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings and deficiencies of ...
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IPC IPC(8): C07C57/05C07C51/25
CPCC07C51/252C07C51/42C07C57/04
Inventor 孙立平黄立勇
Owner TAIXING JURONG CHEM CO LTD