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

Method for reducing ammonia nitrogen in industrial wastewater

A technology for industrial wastewater and ammonia nitrogen, applied in chemical instruments and methods, ion exchange water/sewage treatment, cation exchange, etc., can solve the problems of complex preparation process, high investment and operating costs, and achieve simple process, no secondary pollution, The effect of mature technology

Active Publication Date: 2013-12-04
EAST CHINA UNIV OF SCI & TECH +1
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN86106921A takes natural clinoptilolite or mordenite as the main raw material, adds a certain amount of aluminum hydroxide, potassium chloride, sodium hydroxide and water to mix and crystallize for a long time to synthesize an adsorbent to treat ammonia nitrogen wastewater, and its preparation process more complicated
Regardless of the use of large adsorption capacity adsorbents or the regeneration and reuse of adsorbents, the investment and operating costs are quite high

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 reducing ammonia nitrogen in industrial wastewater
  • Method for reducing ammonia nitrogen in industrial wastewater
  • Method for reducing ammonia nitrogen in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Adopt the in-situ crystallization NaY molecular sieve material identical with comparative example 1, each consumption 100 grams (dry basis), simulate zeolite molecular sieve in Buchner funnel and suction filter flask three sections countercurrent adsorption exchange on belt filter, as figure 1 shown. The vacuum degree of the filter bottle is 0.04MPa, and the thickness of the filter cake is 15mm. Mix the in-situ crystallized NaY molecular sieve material with 3 times deionized water for beating, pour it into a Buchner funnel, filter with suction, discard the waste water, and obtain the filter cake W 0 , add 1000 milliliters and be taken from Shanghai Nake Auxiliary Co., Ltd. catalytic cracking catalyst production process containing ammonia nitrogen wastewater (concentration of ammonia nitrogen is 4050mg / L, Na 2 O content is 0.12%; denoted as E 0 ), suction filtration, the filter cake and filtrate are used for subsequent adsorption exchange, until the filter cake W corre...

Embodiment 2

[0066] NaY molecular sieve synthesized by gel method (NaY crystallinity: 91%; silicon-aluminum ratio: 5.2; NaY 2 O content: 13.5%; taken from Shanghai Naco Auxiliary Co., Ltd.) simulated zeolite molecular sieve in Buchner funnel and suction filter flask on three-stage countercurrent adsorption exchange on belt filter, such as figure 1 As shown, each NaY molecular sieve consumption (dry basis) is 32 grams, the vacuum degree of the suction filter bottle is 0.07MPa, and the filter cake thickness is 8 millimeters. Mix NaY molecular sieve and 3 times deionized water for slurry, pour it into a Buchner funnel, filter with suction, discard the waste water, and obtain the filter cake W 0 , add 300 milliliters and get from Shandong Zibo Ganoderma Lucidum Rare Earth Co., Ltd. rare earth production process containing ammonia nitrogen wastewater (the concentration of ammonia nitrogen is 11200mg / L; denoted as E 0 ), suction filtration, the filter cake and filtrate are used for subsequent a...

Embodiment 3

[0068] A cross-baked ReNaY molecular sieve (La 2 o 3 : 16.1%, Na 2 O content: 4.8%; taken from Shanghai Naco Auxiliary Co., Ltd.) simulated zeolite molecular sieves in the Buchner funnel and suction filter flask and three-stage countercurrent adsorption exchange on the belt filter, such as figure 1 As shown, the dosage (dry basis) of ReNaY molecular sieve for cross-baking each time is 36 grams, the vacuum degree of the suction filter bottle is 0.07 MPa, and the thickness of the filter cake is 7 mm. Mix molecular sieves and 3 times deionized water for beating, pour into a Buchner funnel, filter with suction, discard waste water, and obtain filter cake W 0 , add 1500 milliliters and be taken from Shanghai Nake Auxiliary Co., Ltd. catalytic cracking catalyst production process containing ammonia nitrogen wastewater (the concentration of ammonia nitrogen is 2100mg / LNa 2 O content is 0.8%; denoted as E 0 ), suction filtration, the filter cake and filtrate are used for subsequen...

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 a method for reducing ammonia nitrogen pollution in industrial wastewater, which comprises a step of performing N (N is an integer more than or equal to 3) times of contact exchanges between a Na type zeolite molecular sieve to be modified through ammonium exchange and industrial wastewater containing ammonia nitrogen and / or a fresh solution containing ammonium ions, preferably performing counter current contact exchanges, and more preferably, performing multi-segment counter current ammonium ion exchanges by a band filter. The method reclaims the ammonia nitrogen in the industrial wastewater containing the ammonia nitrogen so that the wastewater can be discharged after reaching standards; and simultaneously, the natrium content in the zeolite molecular sieve is reduced to the technological requirement level through the exchanges; besides, the method has the advantages of simple flow and low operation cost.

Description

technical field [0001] The invention relates to a method for reducing ammonia nitrogen in industrial wastewater by using Na-type molecular sieves, and more specifically relates to a method capable of meeting the requirements of sodium removal of Na-type zeolite molecular sieves to be modified by ammonium exchange and at the same time making the concentration of ammonia nitrogen in industrial wastewater reach environmental protection method of emission requirements. Background technique [0002] Na-type molecular sieves, including faujasite, beta zeolite, mordenite, ZSM series zeolites, especially Y-type molecular sieves in the production of catalytic cracking catalysts. Catalyst activity and stability. To make the sodium content of zeolite molecular sieves and catalysts containing molecular sieve active components meet the requirements of use, it is often necessary to use excessive ammonium salt exchange modification, thus producing process wastewater containing a large amo...

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 Patents(China)
IPC IPC(8): B01J47/10B01J39/14C02F1/42
Inventor 陆善祥孙道斌陈辉李明照雷芳芳冯水利金玲
Owner EAST CHINA UNIV OF SCI & TECH