Method for treating wastewater in 2-propyl heptanol production device

A technology of propyl heptanol and production equipment, which is applied in the field of wastewater treatment in the production equipment of 2-propyl heptanol, can solve the problems of large load of wastewater treatment plants, and achieve low energy consumption, good treatment effect and good technical effect Effect

Inactive Publication Date: 2018-06-08
SINOPEC SHANGHAI ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of large load of wastewater treatment plant in the wastewater treatment process in the prior art, and a new wastewater treatment method in a 2-propylheptanol production device is provided

Method used

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  • Method for treating wastewater in 2-propyl heptanol production device

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Effect test

Embodiment 1

[0022] Waste water treatment method in a kind of 2-propyl heptanol production unit, such as figure 1 Shown, 1000kg / h, 95 ℃ of 2-propylheptanol waste lye wastewater (COD is 30000mg / L, NaOH 1.0wt% in the waste water, sodium pentanoate 4.5wt%, valeraldehyde 0.2wt%, amyl alcohol 0.15 wt%) into the concentration bag equipment, the concentration bag equipment is a multi-effect evaporator, the operating pressure of the evaporator is 0.1bar, the operating temperature is 103°C, the shell side of the evaporator is heated by 3barg low-pressure steam, and the waste water is evaporated and concentrated by self-circulation in the evaporator , 85kg / h of water vapor is evaporated from the top of the evaporator, and after cooling, it becomes water with a COD of 300mg / L and sent to the biochemical treatment plant for treatment; 15kg / h, 103°C concentrated liquid is discharged from the bottom of the evaporator and enters the cooler for cooling To 15°C, the cooled concentrated solution enters the ...

Embodiment 2

[0025] Waste water treatment method in a kind of 2-propyl heptanol production unit, such as figure 1 Shown, 1000kg / h, 95 ℃ of 2-propylheptanol waste lye wastewater (COD is 30000mg / L, NaOH 1.0wt% in the waste water, sodium pentanoate 4.5wt%, valeraldehyde 0.2wt%, amyl alcohol 0.15 wt%) into the concentration bag equipment, the concentration bag equipment is a multi-effect evaporator, the operating pressure of the evaporator is 0.1bar, the operating temperature is 103°C, the shell side of the evaporator is heated by 3barg low-pressure steam, and the waste water is evaporated and concentrated by self-circulation in the evaporator , 85kg / h of water vapor is evaporated from the top of the evaporator, and after cooling, it becomes water with a COD of 300mg / L and sent to the biochemical treatment plant for treatment; 15kg / h, 103°C concentrated liquid is discharged from the bottom of the evaporator and enters the cooler for cooling To 15°C, the cooled concentrated solution enters the ...

Embodiment 3

[0028] Waste water treatment method in a kind of 2-propyl heptanol production unit, such as figure 1Shown, 1000kg / h, 95 DEG C of 2-propylheptanol waste lye wastewater (COD is 50000mg / L, NaOH 1.0wt% in the wastewater, sodium pentanoate 5.1wt%, valeraldehyde 0.2wt%, pentanol 0.15 wt%) into the concentration bag equipment, the concentration bag equipment is a multi-effect evaporator, the operating pressure of the evaporator is 0.1bar, the operating temperature is 104°C, the shell side of the evaporator is heated by 3barg low-pressure steam, and the waste water is evaporated and concentrated by self-circulation in the evaporator , 84kg / h of water vapor is evaporated from the top of the evaporator, and after cooling, it becomes water with a COD of 300mg / L and sent to the biochemical treatment plant for treatment; 16kg / h, 104°C concentrated liquid is discharged from the bottom of the evaporator and enters the cooler for cooling After reaching 60°C, the cooled concentrated solution e...

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Abstract

The invention relates to a method for treating wastewater in a 2-propyl heptanol production device, and mainly solves the problem of great load of a wastewater treatment plant in the wastewater treatment process in the prior art. The method for treating wastewater in the 2-propyl heptanol production device comprises the following steps that (1) wastewater enters concentration bag equipment; concentrated liquid obtained by the concentration bag equipment is cooled by a cooler and then enters an acidification tank; water concentrated by the concentration bag equipment enters a biochemical treatment plant for biochemical treatment; (2) the concentrated liquid at an outlet of the acidification tank enters a chromatography device to obtain an organic phase and a water phase; (3) the organic phase enters a rectifying tower; valeric acid is obtained at the top of the rectifying tower; heavy ingredients of a rectification tower kettle enter an incinerator; the water phase enters an evaporativecrystallization device to obtain water and solid salts, wherein the water returns to the concentration bag equipment for reuse. The technical scheme better solves the problems, and can be used for wastewater treatment in the 2-propyl heptanol production device.

Description

technical field [0001] The invention relates to a wastewater treatment method in a 2-propylheptanol production device. Background technique [0002] my country's existing 2-propylheptanol production process is mainly butene oxo synthesis. In the method, valeraldehyde is firstly synthesized by using butene and synthesis gas as raw materials, and then undergoes aldol condensation reaction of valeraldehyde under the catalysis of 2% sodium hydroxide to generate decenal (PBA). PBA is hydrogenated to 2-propylheptanol. During the aldol condensation reaction, water will be generated and the concentration of lye will decrease, and the sodium valerate produced by the side reaction will accumulate in the system, so a certain amount of high-concentration fresh lye must be added, and part of the lye must be discharged at the same time. Produced 2-propylheptanol spent lye. [0003] The salient features of waste lye are high pH value, high organic content, high chemical oxygen demand (C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14F23G7/04C07C51/42C07C53/126C02F103/36
CPCC02F1/04C02F1/66C02F3/00C02F9/00C02F2103/36C02F2209/02C02F2209/03C02F2209/06C02F2209/08C02F2301/046C02F2301/08C07C51/42F23G7/04C07C53/126
Inventor 裴凯凯印立峰陈迎吕睿刘肖肖张艺徐曼
Owner SINOPEC SHANGHAI ENG
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