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Phenol and ammonia wastewater recycling treatment method by using single tower for performing de-acidification and de-amination simultaneously

A technology of deacidification and deamination and treatment method, which is applied in the field of recovery and treatment of phenol ammonia wastewater using single tower deacidification and deamination at the same time, can solve the problems of high energy consumption and large equipment investment, and achieve simplified process flow and reduction of tower equipment , Reduce the effect of equipment investment

Inactive Publication Date: 2013-01-09
TIANJIN HAOYONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problems of large equipment investment and high energy consumption in the recovery and treatment of phenol ammonia wastewater in the coal gasification process, and invents a new process for the treatment of phenol ammonia wastewater with a single tower decomposing ammonia salt and deacidification and deamination at the same time

Method used

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  • Phenol and ammonia wastewater recycling treatment method by using single tower for performing de-acidification and de-amination simultaneously
  • Phenol and ammonia wastewater recycling treatment method by using single tower for performing de-acidification and de-amination simultaneously

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) After the 120t / h waste water is transported from the gas-water separator, the suspended solids, tar and light oil are removed, the temperature is 40°C, and the pressure is 1.0 MPa. The concentration is phenol 7g / L, ammonia 9g / L, carbon dioxide 3.8g / L, hydrogen sulfide 0.2g / L.

[0041] (2) The waste water containing phenol and ammonia from the gas-water separator is divided into two streams: one stream of 35t / h is cooled to room temperature by the raw material cooler (3) and then enters the top of the tower; the other stream passes through the secondary total condenser (23 ), preheater two (7), and preheater one (6) are heated to 95°C and enter the middle and upper part of the deacidification and deamination tower (4).

[0042] (3) The deacidification and deamination tower is a plate tower. The operating pressure of the deacidification and deamination tower is 500kPa(g) (gauge pressure), the temperature at the top of the tower is 85°C, and the temperature at the bot...

example 1

[0050] (1) The concentration of ammonia in the wastewater after deacidification and deamination is 95 mg / L.

[0051] (2) The solvent consumption is 1.25kg / t waste water.

[0052] (3) The phenol content in the treated wastewater is 200 mg / L.

[0053] (4) The mass concentration of the crude phenol product is 99.4%.

[0054] (5) The quality concentration of ammonia water at the bottom of the ammonia concentration tower is 12%, and the concentration of ammonia in the tail gas is 38 mg / m3.

[0055] (6) The steam consumption of the device is 170kg steam / t waste water.

Embodiment 3

[0057]

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Abstract

The invention relates to a treatment method for wastewater containing phenol and dissoluble amine salts produced in chemical industry production, and particularly relates to a phenol and ammonia wastewater recycling treatment method by using a single tower for performing de-acidification and de-amination simultaneously. By means of an energy-saving technology which uses a single device for decomposing amine salts and achieving separation and purification, the device investment is reduced; and the energy recycling is achieved by using a differential pressure rectification technology, so that the energy consumption is reduced. Specifically, a de-acidification and de-amination coupling tower is used, and side withdrawing and differential pressure rectification technologies are utilized for achieving a simultaneous de-acidification and de-amination process and recycling ammonia and phenol in coal gasification wastewater, and accordingly, the method is energy saving and emission reducing, the technological process is simplified simultaneously, and the operation difficulty is reduced. According to the phenol and ammonia wastewater recycling treatment method by using the single tower for performing de-acidification and de-amination simultaneously, technical problems of large device investment and high energy consumption in phenol and ammonia wastewater recycling in a coal gasification process are solved, the technological process is simplified through the coupling of devices, and high economic and social values are provided.

Description

technical field [0001] The invention relates to a method for treating waste water containing phenol and decomposable ammonia salt in coal chemical industry. Specifically, it is a deacidification and deamination coupling tower, which adopts side line extraction and differential pressure rectification technology to realize simultaneous deacidification in a single tower. Acid deammonification process, recovering ammonia and phenol in coal gasification wastewater, saving energy and reducing emissions while simplifying the process and reducing equipment investment. Background technique [0002] Coal gasification technology is an effective method for efficient utilization of coal, and is widely used in industries such as coal-to-natural gas, synthetic ammonia, methanol, and coal-based power generation. Coal gasification and coking will produce a large amount of wastewater, which contains a large amount of suspended solids, tar, light oil, fatty acid, carbon dioxide, hydrogen sulfi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/02C02F1/04C02F1/20C02F1/26
Inventor 刘景华郑松章张爱民
Owner TIANJIN HAOYONG CHEM TECH
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