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Method for adsorbing and removing ammonia and nitrogen in wastewater by zeolite and adsorption denitrification device

An adsorption denitrification, adsorption device technology, applied in adsorption water/sewage treatment, chemical instruments and methods, natural water treatment, etc., can solve the problems of reducing the total nitrogen treatment load, difficult to reach the standard of total nitrogen depth, etc., to reduce consumption , high adsorption efficiency, simple method

Inactive Publication Date: 2018-09-07
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The analysis of the denitrification capacity of the conventional sewage treatment process shows that the existing petroleum refining sewage treatment process is difficult to achieve the total nitrogen depth standard, and the total nitrogen treatment load needs to be reduced

Method used

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  • Method for adsorbing and removing ammonia and nitrogen in wastewater by zeolite and adsorption denitrification device
  • Method for adsorbing and removing ammonia and nitrogen in wastewater by zeolite and adsorption denitrification device
  • Method for adsorbing and removing ammonia and nitrogen in wastewater by zeolite and adsorption denitrification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a small-scale test method and device for removing ammonia nitrogen in wastewater by dynamic zeolite adsorption.

[0039] Experimental material: Liaoning Beipiao natural clinoptilolite was selected as the experimental material, with a density of 1.97g / cm 3 , bulk density 0.96g / cm 3 , porosity 40%-55%, silicon-aluminum ratio 4.10-4.22. Use a sieve to screen out zeolites with particle sizes of 0.5-1.5mm, 1.5-2.5mm, 2.5-3.5mm, and 3.5-4.5mm, wash them with ultrapure water, and dry them for later use. The elemental composition of this natural zeolite is shown in Table 1, and the scanning (BEM) photograph of physical figure and surface is shown in respectively figure 1 with figure 2 .

[0040] Table 1

[0041] element

C

O

Na

Mg

Al

Si

K

Ca

Fe

content(%)

14.92

0.27

0.31

0.76

4.24

15.86

0.45

2.93

0.33

[0042] The device used in this dynamic adsorption experiment is as...

Embodiment 2

[0045] This embodiment provides a pilot test method and device for removing ammonia nitrogen in wastewater by dynamic zeolite adsorption.

[0046] Experimental material: the zeolite of Example 1 was selected as the experimental material. The device used in this dynamic adsorption pilot experiment is as follows: Figure 4 shown.

[0047]Zeolite regeneration conditions are the key to the zeolite adsorption denitrification method. The conditions of zeolite regeneration determined in the laboratory are difficult to simulate the working conditions of industrial equipment. Therefore, the pilot plant constructed in this example is mainly used to determine the regeneration conditions and regeneration conditions of zeolite. The final adsorption capacity provides scientific data support for the industrial application of this technology. Such as Figure 4 As shown, the inner diameter of the adsorption column is D=350mm, the total height is 3300mm, the effective height is 2.75m (the ra...

Embodiment 3

[0049] This embodiment studies the main factors affecting the adsorption and desorption of ammonia nitrogen by zeolite. The specific experiments are as follows:

[0050] ① Static adsorption experiment

[0051] Content 1: The effect of zeolite particle size on the adsorption effect was studied:

[0052] Weigh 10g of zeolite with different particle sizes (0.5-1.5mm, 1.5-2.5mm, 2.5-3.5mm, 3.5-4.5mm) into a 500ml Erlenmeyer flask, add 200mL of NH with an ammonia nitrogen concentration of 200.00mg / L 4 Cl solution was shaken at a constant temperature of 60 ° C, and samples were taken every 0.5 h to determine the concentration of ammonia nitrogen. And according to formula (1) calculate the equilibrium adsorption capacity of zeolite (q e , mg / g):

[0053] q e =V(C 0 -C e ) / m (1)

[0054] Among them: C 0 is the initial concentration of ammonia nitrogen (mg / L), C e is the remaining ammonia nitrogen concentration (mg / L) in the zeolite adsorption equilibrium solution, m is the do...

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Abstract

The invention provides a method for adsorbing and removing ammonia and nitrogen in wastewater by zeolite and an adsorption denitrification device. The method for adsorbing and removing ammonia and nitrogen in wastewater comprises the following steps of allowing wastewater containing ammonia and nitrogen to flow through an adsorption device filled with zeolite to undergo adsorption denitrificationtreatment, wherein the temperature for adsorption denitrification treatment is 30-75 DEG C, and the wastewater containing ammonia and nitrogen stays in the adsorption device for 15-30 minutes; and discharging the purified wastewater containing ammonia and nitrogen to an integrated sewage treatment plant and discharging the water with standard level, wherein the saturated zeolite material is regenerated through a method of alkali liquor reverse cycle plus blasting plus steam stripping, and the renewed alkali liquor is recycled as alkali water of a high-ammonia and nitrogen sewage steam stripping treatment device.

Description

technical field [0001] This specification belongs to the technical field of refinery and chemical purification water treatment, and relates to a method for removing ammonia nitrogen in wastewater by zeolite adsorption and an adsorption denitrification device. Background technique [0002] The nitrogen in the oil product is converted and migrated to the water phase during the primary and secondary processing of crude oil to form a large amount of high-nitrogen point source sewage (acidic water). Purified water is extracted, part of the stripped purified water is reused as water injection to the electric desalination device and discharged to the sewage treatment plant, and part of it is directly discharged to the sewage treatment plant. The analysis of nitrogen discharge in the source sewage showed that the steam stripped purified water was the largest contributor to the total nitrogen load of the sewage treatment plant. The analysis of the denitrification capacity of the con...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F103/36
CPCC02F1/281C02F2103/365C02F2303/16
Inventor 相养冬郭绍辉李长刚阎光绪刘维功于洋刘海澄曾海方力张华姜晓艳翁艺斌杨振兴
Owner PETROCHINA CO LTD
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