Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for treating ammonium-salt-containing wastewater

A wastewater treatment and wastewater technology, applied in the field of ammonium-containing high-salt wastewater treatment and ammonium-containing wastewater treatment, can solve the problem of high cost of ammonium-containing high-salt wastewater treatment, reduce treatment costs, reduce environmental pollution, and achieve near-zero emissions Effect

Active Publication Date: 2018-07-24
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of high cost of ammonium-containing high-salt wastewater treatment in the prior art, and provide a low-cost and environmentally friendly ammonium-containing high-salt wastewater treatment method, which can recycle ammonium and salt in the wastewater, maximize Reuse resources in waste water efficiently, and can achieve near-zero discharge

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating ammonium-salt-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Such as figure 1 As shown, the waste water (containing NaCl 150g / L, Na 2 SO 4 56g / L, NH 4 Cl 27g / L, (NH 4 ) 2 SO 4 10.24g / L) with a feed rate of 120m 3 The speed of / h is passed into the vacuum degassing tank 4 for degassing (the vacuum degree of the gauge pressure gauge is-70kPa), and the waste water after the degassing is sent to the first heat exchange device 3 (titanium alloy plate heat exchanger) Introduce the sodium hydroxide aqueous solution that concentration is 45.16 mass % in the pipeline and carry out the pH value adjustment for the first time, and the adjusted pH value is monitored by the first pH value measuring device 61 (pH meter) (measured value is 8.0), will The waste water adjusted by the first pH value is sent to the first heat exchange device 31 through the first circulating pump 71, and performs a first heat exchange with the recovered first ammonia-containing steam condensate water to raise the temperature of the waste water to 63°C; then, i...

Embodiment 2

[0096] Carry out the treatment of waste water according to the method for embodiment 1, difference is, to containing NaCl 221g / L, NH 4 Cl 40g / L wastewater for treatment. The first evaporation conditions of the MVR evaporation device 2 include: the temperature is 90°C, the gauge pressure is -47.89kPa, and the evaporation capacity is 26m 3 / h. The second evaporation conditions of the multi-effect evaporator 1 include: the evaporation conditions of the first effect evaporator 1a include: a temperature of 140°C, a gauge pressure of 193.83kPa, and an evaporation capacity of 33.6m 3 / h; the evaporation conditions of the second effect evaporator 1b include: the temperature is 125°C, the gauge pressure is 130.69kPa, and the evaporation capacity is 33.6m3 / h; the evaporation conditions of the third effect evaporator 1c include: the temperature is 85°C, the gauge pressure is -57.65kPa, and the evaporation capacity is 33.8m 3 / h.

[0097] MVR evaporator 2 gets 77.05m per hour 3 Conta...

Embodiment 3

[0100] Carry out the treatment of waste water according to the method for embodiment 1, difference is, to containing Na 2 SO 4 130g / L, (NH 4 ) 2 SO 4 20g / L of wastewater for treatment. The first evaporation conditions of the MVR evaporation device 2 include: the temperature is 120°C, the gauge pressure is 56.97kPa, and the evaporation volume is 22.43m 3 / h. The second evaporation conditions of the multi-effect evaporator 1 include: the evaporation conditions of the first effect evaporator 1a include: the temperature is 155°C, the pressure in gauge pressure is 349.43kPa, and the evaporation capacity is 33.1m 3 / h; the evaporation conditions of the second effect evaporator 1b include: the temperature is 135°C, the gauge pressure is 211.6kPa, and the evaporation capacity is 33.1m 3 / h; the evaporation conditions of the third effect evaporator 1c include: the temperature is 100°C, the gauge pressure is -22.82kPa, and the evaporation capacity is 33.1m 3 / h.

[0101] MVR ev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of sewage treatment, and discloses a method for treating ammonium-salt-containing wastewater; the method is as follows: introducing the wastewater into a MVR evaporation device for first evaporation to obtain a first ammonia-containing vapor and a first concentrated liquid, sequentially introducing the first concentrated liquid into various effect evaporators ofa multi-effect evaporation device for second evaporation to obtain second ammonia-containing vapors in the various effect evaporators and finally obtain a second concentrated liquid in the last-effectevaporator; before the wastewater is introduced into the MVR evaporation device, the pH of the wastewater is adjusted to be greater than 9; before the wastewater is introduced into the MVR evaporation device and the multi-effect evaporation device, the nia-containing vapor is exchanged with the wastewater to obtain ammonia water; the first evaporation causes the solid content in the first concentrated liquid is 50% by mass or less. The method is a low-cost and environment-friendly ammonium-containing high-salt wastewater treatment method, the method can recover ammonium and salts in the wastewater, maximizes the reuse of resources in the wastewater, and can achieve near-zero emission.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating ammonium-containing salt wastewater, in particular to a method for treating ammonium-containing high-salt wastewater. Background technique [0002] In the production process of oil refining catalyst, a large amount of inorganic acid-base salts such as sodium hydroxide, hydrochloric acid, sulfuric acid, ammonium salt, sulfate, hydrochloride, etc. are required, and a large amount of ammonium, sodium sulfate, sodium chloride and aluminosilicate are produced Salt mixed sewage. For such sewage, the usual practice in the prior art is to first adjust the pH value to the range of 6-9, remove most of the suspended solids, and then use biochemical methods, stripping methods or stripping methods to remove ammonium ions. In addition, after adjusting the pH value of the salty sewage, removing most of the suspended matter, removing hardness, removing silicon and some orga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04
CPCC02F1/04
Inventor 殷喜平顾松园杨凌李叶周岩王晓文伊红亮
Owner CHINA PETROLEUM & CHEM CORP