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Waste water zero discharge acrylic acid refining device and process

An acrylic acid, zero-discharge technology, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problem of not fundamentally achieving zero-discharge of wastewater and long-term cycle, and achieve the goal of saving consumption, reducing production costs and reducing losses. Effect

Inactive Publication Date: 2018-03-30
张华堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature of the tower kettle is still at 82-85°C, which has not decreased significantly, and the problem of too short operation period of the device has not been completely solved.
And, this application is the same with traditional processing method, still has aforementioned waste water problem
[0005] In summary, the existing acrylic acid devices and processes have not fundamentally achieved zero discharge of wastewater and long periods of device operation

Method used

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  • Waste water zero discharge acrylic acid refining device and process
  • Waste water zero discharge acrylic acid refining device and process
  • Waste water zero discharge acrylic acid refining device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a kind of acrylic acid refining device with zero discharge of waste water, said device includes absorption tower 1-0, dehydration tower 2-0, deacetic acid tower 3-0, weight removal tower 5-0, first circulation system and second Circulation system; the bottom outlet of the absorption tower 1-0 is connected to the inlet of the dehydration tower 2-0 through the first storage tank 2-1; the top outlet of the dehydration tower 2-0 is connected to the first circulation The system is connected; the bottom outlet of the dehydration tower 2-0 is connected with the inlet of the deacetic acid tower 3-0 through the second storage tank 3-1; the top outlet of the dehydration tower 3-0 is connected with the The second circulation system is connected; the bottom outlet of the deacetic acid tower 3-0 is connected with the weight removal tower 5-0 through the third storage tank 4-1.

[0036] The first circulation system includes a first condenser 2-2, a first s...

Embodiment 2

[0038] Such as figure 2 As shown, a kind of acrylic acid refining device with zero discharge of waste water, the device is the same as Example 1, the only difference is that the second circulation system also includes an acetic acid concentration tower 6-0, a third condenser 6-1, The third layerer 6-2 and the acetic acid deweighting tower 7-0; the water phase outlet of the second layerer 3-3 is connected with the inlet of the acetic acid concentration tower 6-0; the acetic acid extraction The top outlet of the concentrated tower 6-0 is connected with the inlet of the third condenser, the outlet of the third condenser 6-1 is connected with the inlet of the third stratifier 6-2, and the third condenser 6-1 is connected with the inlet of the third stratifier 6-2. The water phase outlet of the three stratifiers 6-2 is connected with the water phase storage tank 8-1, and the solvent phase outlet of the third stratifier 6-2 is connected with the acetic acid concentration tower 6-0 ...

Embodiment 3

[0040] Such as image 3 As shown, an acrylic acid refining device with zero discharge of waste water is the same as in Example 2, except that the first circulation system also includes a stripper 8-0 and a recovered water storage tank 8-2; The outlet of the water phase storage tank 8-1 is connected with the inlet of the stripping tower 8-0; the bottom outlet of the stripping tower 8-0 passes through the recovery water storage tank 8-2 and the absorption tower 1-0 for the central entrance to connect.

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Abstract

The invention relates to an acrylic acid refining device with zero discharge of waste water. The device includes an absorption tower, a dehydration tower, an acetic acid removal tower, a weight removal tower, a first circulation system and a second circulation system; the bottom outlet of the absorption tower is connected to the inlet of the dehydration tower through a first storage tank; The top outlet of the dehydration tower is connected with the first circulation system; the bottom outlet of the dehydration tower is connected with the inlet of the deacetic acid tower through the second storage tank; the top outlet of the dehydration tower is connected with the The second circulation system is connected; the bottom outlet of the deacetic acid tower is connected with the weight removal tower through the third storage tank. The invention also relates to a process for refining acrylic acid with zero discharge of waste water. Beneficial effects: the present invention can realize zero discharge of waste water in the true sense.

Description

technical field [0001] The invention relates to an acrylic acid refining device with zero discharge of wastewater, and also relates to a process for refining acrylic acid with zero discharge of wastewater. Background technique [0002] Acrylic acid is an important organic synthetic raw material and synthetic resin monomer. Acrylic acid and acrylate can be homopolymerized and copolymerized. Its polymers are used in synthetic resins, synthetic fibers, superabsorbent resins, building materials, coatings, etc. The production capacity of acrylic acid in China is growing rapidly, and most of the production processes used are derived from foreign technologies and have been improved, but there are still some technical bottlenecks that have not been solved well for many years, the most prominent of which are the waste water problem and the continuous operation of the device The problem of too short cycle time. The wastewater problem is specifically reflected in the difficulty and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/42C07C51/46C07C51/44C07C57/07
CPCC07C51/42C07C51/44C07C51/46C07C57/04
Inventor 张华堂
Owner 张华堂
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