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Method and device for treating oil refining salt-containing sewage by using oil refining waste catalyst and ozone

A technology for oil refinery waste catalyst and ozone treatment, which is applied in chemical instruments and methods, special compound water treatment, oxidized water/sewage treatment, etc. It can solve the problems of poor catalyst technical economy, heterogeneous catalyst compaction, unfavorable ozone-catalyst-pollutant Mass transfer and other issues, to achieve the effect of promoting clean production and circular economy, improving ozone utilization rate, and low treatment cost

Active Publication Date: 2015-02-25
北京中实奥杰石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical and economical evaluation of the above-mentioned patented technology found the following main problems: (1) The overall process flow is too complicated, mostly centered on the ozone catalytic oxidation method, supplemented by activated carbon adsorption, microbial enhanced treatment and other technologies, which greatly reduces the Feasibility of technical engineering application; (2) mainly fixed bed reactors, the fouling tendency of salty sewage can easily cause heterogeneous catalyst hardening and affect stable operation, and it is also not conducive to the ozone-catalyst-pollutant relationship Mass transfer; (3) The technical economy of the catalyst is poor, mostly granular activated carbon and γ-Al 2 o 3 The preparation of heterogeneous catalysts for supporting metal / noble metal / rare earth oxides is not only complicated and costly, but also has the problem of loss of active components during the process.
However, in the field of ozone catalytic oxidation sewage treatment technology, the three-phase fluidized bed reactor technology has not been adopted precedent

Method used

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  • Method and device for treating oil refining salt-containing sewage by using oil refining waste catalyst and ozone
  • Method and device for treating oil refining salt-containing sewage by using oil refining waste catalyst and ozone
  • Method and device for treating oil refining salt-containing sewage by using oil refining waste catalyst and ozone

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Effect test

Embodiment 1

[0041] This embodiment provides a device for treating oil refinery salty sewage by utilizing spent refinery catalyst and ozone, such asfigure 1 and figure 2 As shown, the device includes a fluidized bed reactor 1, a vertical flow sedimentation tank 2 and an air source ozone generator 3; the fluidized bed reactor 1 includes a reactor outer cylinder 101, and is located outside the reactor The inner lifting cylinder 102 in the cylinder 101; the top of the reactor outer cylinder 101 is provided with a liquid outlet 103 and an ozone tail gas outlet 104, and the bottom is provided with a sewage inlet 105, an ozone inlet 106, a vent 107, a sight glass or a manhole 108, and the reaction The upper part of the inner wall of the outer cylinder 101 is provided with an overflow cofferdam 109; the upper part of the inner lifting cylinder 102 is provided with a shroud 110, the lower part is provided with an ozone microporous aeration disc 111, and the inner lower end of the inner lifting cyl...

Embodiment 2

[0045] This example provides a spent oil refinery catalyst after activation treatment, which is prepared by the following method: put the spent FCC catalyst into a NaOH or KOH solution with a mass concentration of 5m%-10m% at 40°C-90°C for cleaning 1-2 hours; after taking it out, dry it at room temperature for 24-48 hours, and then dry it in an oven at 80°C-120°C for 2-4 hours; after drying, the spent FCC catalyst is roasted at 550°C-650°C for 2-3 hours. The spent oil refinery catalyst after activation treatment is obtained. The main components of the prepared catalyst are as follows: NiO is 2.0m%, Fe 2 o 3 2.3m%, V 2 o 5 1.57m%, SiO 2 38.46m%, Al 2 o 3 It is 49.48m%. The total specific surface area of ​​the activated refinery waste catalyst is 84.4m 2 / g, the pore volume is 0.22cm 3 / g, the average pore diameter is 7.58nm. The surface X-ray energy spectrum analysis diagram and scanning electron microscope diagram of the spent oil refinery catalyst after the activati...

Embodiment 3

[0047] In this example, a gas-liquid-solid three-phase fluidized bed reactor is used to catalyze and oxidize the salty sewage of oil refinery, and the spent oil refinery catalyst after the activation treatment of "cleaning-drying-roasting" is used as an ozone synergistic catalyst to provide a method for utilizing waste oil refining Catalyst and ozone treatment method for oil refinery saline sewage, specifically adopt the device provided in embodiment 1 and the catalyst provided in embodiment 2, the steps are: make the oil refinery salty sewage to be treated and ozone-containing gas flow in the fluidized bed reactor 1 The bottom of the inner lifting cylinder 102 is input, and under the joint action of the upwardly flowing water and the ozone-containing gas, the "cleaning-drying-roasting" activation treatment in the inner lifting cylinder 102 (fluidized reaction zone 11) The spent refining catalyst particles are in a fluidized state, and undergo sufficient mass transfer and react...

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Abstract

The invention provides a method and device for treating oil refining salt-containing sewage by using an oil refining waste catalyst and ozone. According to the method, the oil refining salt-containing sewage is subjected to catalytic oxidation treatment of internal circulation in a fluidized bed reactor by using ozone-containing gas and an activated oil refining waste catalyst, and the treated sewage flows through a vertical sedimentation basin and then is discharged outwards, wherein the CODcr (chemical oxygen demand) value of the effluent satisfies the primary standard A of Chinese Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The device is used for implementing the method, and at least comprises a fluidized bed reactor and a vertical sedimentation basin. According to the method and the device disclosed by the invention, the oil refining waste catalyst is used as a sewage ozone treatment cooperating catalyst, so that a utilization direction of 'waste control by waste' is provided for solid wastes of oil refining plants, and the problem of relatively high cost of a catalyst is solved; and the mass transfer effect among ozone, a catalyst and organic pollutants is strengthened by using a fluidization technology, and the problems that the utilization rate of ozone is relatively low and the catalyst is easy to scale are solved.

Description

technical field [0001] The invention relates to a method and a device for treating oil refinery sewage, in particular to a method and a device for treating oil refinery salty sewage by utilizing waste refinery catalyst and ozone, and belongs to the technical field of oil refinery sewage treatment. Background technique [0002] According to the sewage classification method and treatment system commonly used in oil refineries, all point source sewage discharged during the oil refining process can be divided into two types: salty sewage and oily sewage. classification processing. Saline sewage comes from crude oil tank dehydration and electric desalination sewage. Inorganic ions and polar organic substances in crude oil will be distributed in a large proportion in the water body, so its salt content (conductivity > 4000μs / cm) and organic load are high. Moreover, the pollution composition is complex, and the biodegradability is poor. After the "physicochemical-biochemical" p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78
CPCC02F1/78C02F2201/002C02F2201/78C02F2301/00C02F2305/00C02F2305/023
Inventor 陈春茂王刚李敏余稷韩超阎光绪郭绍辉
Owner 北京中实奥杰石油科技有限公司
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