Method and device for high-efficiency energy-saving desolvation of fossilized animal/plant wax-containing solution

A high-efficiency energy-saving, animal and plant technology, applied in the field of coal processing, can solve the problems of large heat energy consumption and large proportion of steam consumption

Active Publication Date: 2012-06-13
QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The evaporation process consumes a lot of heat energy. Throughout the leaching process of petrochemical animal and plant waxes at home and abroad, ste

Method used

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  • Method and device for high-efficiency energy-saving desolvation of fossilized animal/plant wax-containing solution
  • Method and device for high-efficiency energy-saving desolvation of fossilized animal/plant wax-containing solution

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0020] In the step A, the petrified animal and plant wax solution needs to be preheated before entering the primary and secondary evaporators; in the steps C and D, it needs to be preheated before entering the continuous stripping device and the continuous cooking device.

[0021] In the step A, the first and fourth stages of evaporation adopt falling film evaporation, and the second and third stages of evaporation adopt rising film evaporation.

[0022] Such as figure 1 As shown, the device of the present invention includes an evaporator 6 connected to a negative pressure system, a stripper 16 and a desolventization tower 15. The evaporator 6 is four stages, and the evaporator 6 of the first stage is connected to the residual coal removal Dissolved steam pipeline and evaporative feed pump 11, the evaporator 6 of the latter stage is connected through the process of evaporative feed pump 11 in turn; the outlet end of the solvent vapor of the first and second evaporator 6 is pas...

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Abstract

The invention discloses a method and a device for high-efficiency energy-saving desolvation of a fossilized animal/plant wax-containing solution. The method provided by the invention comprises the following steps of continuous four-stage evaporation, continuous steam stripping and continuous steaming, wherein the steps are carried out under negative pressure conditions, and realizes recovery of asolvent in non-condensable gas and comprehensive utilization of energy. The device provided by the invention comprises a four-stage evaporator, a stripping tower, a desolvation tower, an auxiliary feed pump, a heater, an economizer and a condenser, wherein the four-stage evaporator, the stripping tower and the desolvation tower are connected to a negative pressure system. The method and the device have the advantages that under negative pressure conditions, the steps of continuous four-stage evaporation, continuous steam stripping and continuous steaming are adopted and waste heat produced bythe steps is utilized fully so that desolvation efficiency is high; a wax heating temperature is low so that improvement of a wax acid value and a wax saponification value is promoted; and multipath recovery of a solvent and non-condensable gas is realized and thorough solvent recovery is realized so that a production cost is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of coal processing, and in particular relates to a high-efficiency, energy-saving desolventization method and a device thereof for a solution containing fossilized animal and plant waxes with high desolventization efficiency and energy saving. Background technique [0002] At present, the extraction of fossilized animal and plant waxes (such as peat wax, montan wax, and oil shale wax) is done by solvent leaching. Through leaching operations, the fossilized animal and plant waxes in the raw materials are dissolved in the solvent, and then The solvent containing fossilized animal and vegetable waxes is desolvated to obtain fossilized animal and vegetable waxes. In the leaching process, the solvent used to extract wax is recycled. The separation of solvent, wax and coal is an important link, and more than 80% of the solvent is recovered here. Therefore, this process is not only related to solvent consumption. ...

Claims

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Application Information

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IPC IPC(8): C11B11/00
CPCY02W30/74
Inventor 刘长胜罗国林
Owner QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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