Device and method for recycling low-concentration organic solvent

A technology for organic solvents and recovery devices, which is applied in organic chemistry methods, chemical instruments and methods, organic chemistry, etc., can solve the problems of low purity of organic solvents and high energy consumption, and achieve reduced dehydration burden, low energy consumption, and improved economy Effect

Active Publication Date: 2014-03-05
上一环保科技(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the deficiencies of the prior art, and aims to provide a low-concentration organic solvent recovery device and method, which solves the technical problems of high energy consumption and low purity of recovered organic solvents in the prior art.

Method used

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  • Device and method for recycling low-concentration organic solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw material liquid in the raw material liquid tank 1 is an ethanol aqueous solution with a mass concentration of 0.1% ethanol and 99.9% water. After being heated by the first heater 3 through the first delivery pump 2, it enters the pervaporation membrane module 4 for organic solvent separation and pervaporation The membrane module 4 is evacuated by the first vacuum pump 6, the permeated liquid is evacuated by the first condenser 5, the temperature of the first heater heating 3 is 40°C, the operating pressure of the first vacuum pump 6 is 800 Pa, and the permeated liquid has a mass concentration of 10 % of the ethanol aqueous solution and enter the separation liquid tank 7; the second delivery pump 8 beats the ethanol aqueous solution into the distillation tower 10 after being heated by the second heater 9 to carry out distillation and enrichment, the operating pressure of the distillation tower 10 is normal pressure, and the distillation temperature Control at 90°C...

Embodiment 2

[0045] The raw material liquid in the raw material liquid tank 1 is an acetone aqueous solution with a mass concentration of 10% acetone and 90% water. After being heated by the first heater 3 through the first delivery pump 2, it enters the pervaporation membrane module 4 for organic solvent separation and pervaporation. The membrane module 4 is evacuated by the first vacuum pump 6, the permeated liquid is evacuated by the first condenser 5, the temperature of the first heater heating 3 is 50°C, the operating pressure of the first vacuum pump 6 is 500 Pa, and the permeated liquid has a mass concentration of 40 % of the acetone aqueous solution and enter the separating liquid tank 7; the second delivery pump 8 beats the acetone aqueous solution into the distillation tower 10 after being heated by the second heater 9 to carry out distillation and enrichment, the operating pressure of the distillation tower 10 is normal pressure, and the distillation temperature Control at 99°C t...

Embodiment 3

[0047] The raw material liquid in the raw material liquid tank 1 is an aqueous solution of isopropanol with a mass concentration of 6.5% isopropanol and 93.5% water. After being heated by the first heater 3, it enters the pervaporation membrane module 4 for organic solvent Separation, pervaporation membrane module 4 is evacuated by the first vacuum pump 6, the permeated liquid is evacuated by the first condenser 5 condenser, the temperature of the first heater heating 3 is 45 °C, the operating pressure of the first vacuum pump 6 is 500 Pa, and the permeated liquid It is the isopropanol aqueous solution of mass concentration 30% and enters separation liquid tank 7; The second conveying pump 8 beats the acetone aqueous solution through the second heater 9 heating in the distillation tower 10 and carry out distillation enrichment, the operating pressure of the distillation tower 10 At normal pressure, the distillation temperature is controlled at 99°C to obtain an isopropanol conc...

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Abstract

The invention discloses a device and method for recycling a low-concentration organic solvent, belonging to the technical field of environmental protection and solving the technical problems of high energy consumption, low purity of the recycled organic solvent and the like of the prior art. The device comprises a separation system, a concentration system and a dehydration system, wherein the separation system comprises a raw material liquid tank, a first delivery pump, a first heater, a pervaporation membrane component, a first condenser and a first vacuum pump; the concentration system comprises a separation liquid tank, a second delivery pump, a second heater, a distillation tower and a second condenser; the dehydration system comprises a concentration liquid tank, a third delivery pump, a third heater, a vapor permeation membrane component, a third condenser, a second vacuum pump and a product tank. In the device and method disclosed by the invention, the energy consumption for recycling the low-concentration organic solvent is low, and a high-purity organic solvent can be recycled, thereby saving the energy, protecting the environment and realizing an effect on turning waste into wealth.

Description

technical field [0001] The invention relates to a device and method for recovering organic solvents, in particular to a device and method for recovering low-concentration organic solvents, and belongs to the technical field of environmental protection. Background technique [0002] With the rapid development of the economy, the requirements for environmental protection are getting higher and higher, and the available resources are getting less and less. In the process of industrial production, especially in petrochemical, fine chemical and other industries, a large number of industrial by-products are produced, among which waste organic solvents with great utilization value, such as low-concentration alcohol-containing solutions, etc. If these waste water and waste liquid are not properly treated and discharged directly, it will have a bad impact on the surrounding environment and affect human health. At the same time, the waste or discharge of such valuable organic solvent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B63/00C07C31/08C07C31/10C07C29/76C07C45/78C07C49/08
CPCY02P20/10
Inventor 叶舟曾淼
Owner 上一环保科技(杭州)有限公司
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