Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Catalyst production wastewater treatment method

A technology for producing waste water and treatment methods, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of low cost, only mixed salt crystals can be obtained, and high cost of catalyst production waste water treatment

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 2 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 existing technology containing NH4+, SO42-, Cl- and Na+ have a high cost of waste water treatment and can only obtain mixed salt crystals. Provides a low-cost and environmentally friendly NH4+, SO42-, >- and Na+ catalyst production wastewater treatment methods, which can recover ammonium, sodium chloride, and sodium sulfate in wastewater, and reuse resources in wastewater to the greatest extent

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
  • Catalyst production wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Such as figure 1 As shown, the catalyst production wastewater (containing NaCl 155g / L, Na 2 SO 4 75g / L, NH 4 Cl 37g / L, (NH 4 ) 2 SO 4 18.2g / L, pH is 6.3) by the first circulation pump 71 with feed rate is 5m 3 The speed of / h is sent into the pipeline of the treatment system, and the sodium hydroxide aqueous solution that imports concentration is 45.16 mass % in the pipeline is carried out the pH value adjustment for the first time, by the first pH value measuring device 61 (pH meter) after adjusting The pH value is monitored (the measured value is 7.1), and a part of the catalyst production wastewater (4.0m 3 / h) Send it to the first heat exchange device 31 (plastic plate heat exchanger) and perform the first heat exchange with the recovered first ammonia-containing steam condensate to raise the temperature of the catalyst production wastewater to 48°C, and send the other part to the fifth heat exchange The device 35 (duplex stainless steel plate heat exchange...

Embodiment 2

[0134] Carry out the treatment of catalyst production waste water according to the method for embodiment 1, difference is: to containing NaCl 178g / L, NaCl 2 SO 4 22g / L, NH 4 Cl 31.8g / L, (NH 4 ) 2 SO4 4.0g / L, pH is 6.6 catalyst production waste water is processed, a part (5.0m 3 / h) Sending to the first heat exchange device 31 to carry out the first heat exchange with the recovered first ammonia-containing steam condensate to raise the temperature of the catalyst production wastewater to 50°C, and the remainder is sent to the fifth heat exchange device 35 and recovered with the recovered second The ammonia-containing steam condensate is subjected to the first heat exchange to raise the temperature of the catalyst production wastewater to 48°C, and then the catalyst production wastewater is combined and mixed with the second mother liquor to obtain the wastewater to be treated (the SO contained therein 4 2- and Cl - The molar ratio is 1:14.818).

[0135] The evaporation...

Embodiment 3

[0142] Carry out the treatment of catalyst production waste water according to the method for embodiment 1, difference is: to containing NaCl 51g / L, NaCl 2 SO 4 99g / L, NH 4 Cl 22g / L, (NH 4 ) 2 SO 4 43.4g / L, pH of 6.8 catalyst production wastewater for treatment, a part (2.7m 3 / h) send into the first heat exchange device 31 and carry out the first heat exchange with the recovered first ammonia-containing steam condensate to raise the temperature of the catalyst production wastewater to 51 ° C, and send the other part into the fifth heat exchange device 35 and recover the second The ammonia-containing steam condensate is subjected to the first heat exchange to raise the temperature of the catalyst production wastewater to 49°C, and then mixed with the second mother liquor to obtain the wastewater to be treated (the SO contained therein 4 2- and Cl - The molar ratio is 1:11.178).

[0143] The evaporation conditions of the multi-effect evaporator 2 are: the evaporation ...

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

No PUM Login to View More

Abstract

The invention relates to the field of wastewater treatment and discloses a catalyst production wastewater treatment method. The wastewater contains NH4<+>, SO4<2->, Cl<-> and Na<+>. The method comprises the following steps: 1) sending wastewater to be treated into all effect evaporators of a multi-effect evaporation device to be primarily evaporated to obtain first steam containing ammonia and first concentrated liquor containing sodium chloride crystal, wherein the wastewater to be treated contains the catalyst production wastewater; 2) performing first solid-liquid separation on the first concentrated liquor containing the sodium chloride crystal and sending a liquid phase obtained in the first solid-liquid separation into an MVR evaporation device to be secondarily evaporated to obtainsecond steam containing ammonia and second concentrated liquor containing sodium sulfate crystal; 3) performing second solid-liquid separation on the second concentrated liquor containing the sodium sulfate crystal. The method can be used for respectively recycling ammonia, sodium sulfate and sodium chloride in the wastewater, and resources in the wastewater can be reutilized to the maximum extent.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating wastewater produced by catalysts, in particular to a method containing NH 4 + , SO 4 2- , Cl - and Na + Catalyst production wastewater treatment method. Background technique [0002] In the production process of oil refining catalysts, 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 chloride, sodium sulfate 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, removi...

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
IPC IPC(8): C02F1/04C01D3/04C01D5/00C01C1/02C02F101/10C02F101/12C02F101/16C02F103/34
CPCC01C1/022C01D3/04C01D5/00C02F1/048C02F2101/101C02F2101/12C02F2101/16C02F2103/34C02F2209/06C02F2301/08
Inventor 殷喜平李叶苑志伟
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com