Gas-phase formaldehyde extraction system
An extraction system and formaldehyde technology, applied in the field of gas-phase formaldehyde extraction system, can solve the problems of high difficulty and high extraction cost, and achieve the effects of low production cost, high purity and stable system operation.
Pending Publication Date: 2021-06-04
邢台旭阳科技有限公司
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Problems solved by technology
However, since formaldehyde is easily soluble in water, and the boiling point of formaldehyde is relatively close to that of water, it is difficult to extract gas-phase formaldehyde from aqueous formaldehyde solution, and the extraction cost is relatively high.
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[0067] Various aspects and features of the present application are described herein with reference to the accompanying drawings.
[0068] It should be understood that various modifications may be made to the embodiments applied for herein. Accordingly, the above description should not be viewed as limiting, but only as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
[0069] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the general description of the application given above and the detailed description of the embodiments given below, serve to explain the embodiments of the application. principle.
[0070] These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment given as non-limiting examp...
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The invention discloses a gas-phase formaldehyde extraction system comprising a condensation system, a first-stage concentration system, a second-stage concentration system, a pyrolysis separation system, a vacuumizing system and a control system; the condensation system is connected with a first feeding pipeline used for feeding a formaldehyde aqueous solution and a second feeding pipeline used for feeding alcohol; the first-stage concentration system is connected with the condensation system; the second-stage concentration system is connected with the first-stage concentration system; the pyrolysis separation system is connected with the second-stage concentration system; the vacuumizing system is respectively connected with the first-stage concentration system and the second-stage concentration system; and the control system is respectively connected with the condensation system, the first-stage concentration system, the second-stage concentration system, the pyrolysis separation system and the vacuumizing system and is used for controlling the condensation system, the first-stage concentration system, the second-stage concentration system, the pyrolysis separation system and the vacuumizing system to operate. The gas-phase formaldehyde extracted by the system is relatively high in purity, and the system is stable in operation, relatively high in production efficiency and relatively low in production cost.
Description
technical field [0001] The present application relates to the technical field of gas-phase formaldehyde extraction, in particular to a gas-phase formaldehyde extraction system. Background technique [0002] Formaldehyde is an organic chemical substance with the formula HCHO or CH2O. Soluble in water and ethanol. The concentration of formaldehyde solution can reach up to 55%, generally 35%-40%, usually 37%, called formaldehyde water, commonly known as formalin (formalin). As an important chemical product, formaldehyde can be used as a raw material for phenolic resins, urea-formaldehyde resins, vinylon, urotropine, pentaerythritol, dyes, pesticides and disinfectants. At present, the industry usually uses methanol to dehydrogenate or oxidize under the catalysis of silver, copper and other metals, and absorb formaldehyde through water spraying, so as to obtain formaldehyde aqueous solution. However, since formaldehyde is easily soluble in water, and the boiling point of forma...
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Login to View More IPC IPC(8): C07C47/058C07C45/85C07C45/81C07C45/78
CPCC07C45/85C07C45/81C07C45/78C07C47/04
Inventor 赵文会杨洪庆李建莉胡方元范娟娟李哲张永德姚永存
Owner 邢台旭阳科技有限公司