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Process for reducing total nitrogen in methylamine wastewater and device and application thereof

A waste water and methylamine technology, applied in energy waste water treatment, water pollutants, chemical industry, etc., can solve problems such as difficult biochemical treatment, and achieve the effect of avoiding difficult waste liquid treatment and avoiding waste

Active Publication Date: 2020-07-28
LIAOCHENG YANSHAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the problems existing in the above-mentioned prior art, the present invention proposes a process for reducing the total nitrogen of methylamine wastewater and its device and application. The technical solution of the present invention solves the difficult problem of biochemical treatment of wastewater produced by the preparation of methylamine, and improves the water efficiency. Utilization efficiency reduces energy consumption

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  • Process for reducing total nitrogen in methylamine wastewater and device and application thereof
  • Process for reducing total nitrogen in methylamine wastewater and device and application thereof

Examples

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no. 1 example

[0042] refer to figure 1 , a device for reducing the total nitrogen of methylamine wastewater, comprising: a primary purification tower A1, a secondary purification tower A2, a primary purification tower B3, and a secondary purification tower B4, wherein the primary purification tower A1 and the primary purification tower B3 is filled with XDA-1G resin; secondary purification tower A2 and secondary purification tower B4 are filled with LXD-010 resin for adsorption and purification of wastewater.

[0043] Both the primary purification tower A1 and the primary purification tower B3 are provided with methanol inlets and methylamine waste water inlets. Both the secondary purification tower A2 and the secondary purification tower B are provided with hydrochloric acid inlets, and both the secondary purification tower A2 and the secondary purification tower B4 are provided with clean water outlets to discharge purified water obtained after treatment.

[0044] The water outlet of des...

no. 2 example

[0050] Same as the first embodiment, the difference is that the methanol inlet of the primary purification tower A1 and the methanol inlet of the primary purification tower B3 are both connected to the ethanol tank 8 to reuse methanol regenerated by rectification. The hydrochloric acid inlet on the secondary purification tower A2 and the hydrochloric acid inlet on the secondary purification tower B are both connected to the refined alcohol tank 8 to reuse the hydrochloric acid regenerated by rectification. By reusing the regenerated methanol and hydrochloric acid, the waste of methanol and hydrochloric acid is largely avoided, and at the same time, the large amount of waste liquid treatment caused by resin regeneration is avoided, which causes a large load on the enterprise.

no. 3 example

[0052] A process for reducing the total nitrogen of methylamine wastewater, using the attached figure 1 The shown device is carried out, comprising the following steps:

[0053] Use methanol solution with a mass concentration of 95% to soak the XDA-1G resin in the first-level purification tower A1 and the first-level purification tower B3 for 4 hours, and the methanol solution soaked in the resin is discharged into the regenerated methanol tank for temporary storage. The XDA-1G resin reaches standby and the methanol feed is turned off.

[0054] It is the LXD-010 resin in the secondary purification tower A2, secondary purification tower B4 that the hydrochloric acid solution flushing of 4% with mass concentration controls the hydrochloric acid solution flow velocity 1BVm 3 / h, the hydrochloric acid solution that has washed the resin is discharged into the hydrochloric acid tank after regeneration for temporary storage. After the above washing, the LXD-010 resin reaches a stand...

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Abstract

The invention relates to the technical field of methylamine wastewater treatment, in particular to a process for reducing total nitrogen in methylamine wastewater and a device and application of the process. The process comprises the following steps that: wastewater generated in methylamine production is sequentially subjected to adsorption treatment by a first-stage resin and a second-stage resinin a first treatment system, and obtained purified water is output; meanwhile, resin regeneration treatment is carried out on the first-stage resin of the second treatment system by adopting methanoluntil the requirements are met, and resin regeneration treatment is carried out on the second-stage resin of the second treatment system by adopting hydrochloric acid until the requirements are met;methanol obtained after the resin regeneration treatment is sequentially distilled and condensed and then used for first-stage resin regeneration; and hydrochloric acid obtained after the resin regeneration treatment is sequentially distilled and condensed and then used for second-stage resin regeneration. According to the technical scheme, the problem that biochemical treatment of wastewater generated from methylamine preparation is difficult is solved, the utilization efficiency of water is improved, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of methylamine wastewater treatment, in particular to a process for reducing the total nitrogen of methylamine wastewater, a device and an application thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Methylamine is an important chemical raw material. It is widely used in various sectors of the national economy, and is the basic raw material for industries such as pesticides, pharmaceuticals, rubber, leather, synthetic dyes, synthetic resins, chemical fibers, solvents, surfactants, dyes, and photographic materials. There are many ways to produce methylamine, but the method commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F101/30C02F101/38C02F103/36
CPCC02F1/285C02F2101/30C02F2101/38C02F2103/36C02F2301/08C02F2303/16Y02W10/37
Inventor 王德民刘玉伟薛琳静
Owner LIAOCHENG YANSHAN NEW MATERIAL TECH