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

Pretreatment method for high-acid inferior crude oil processing wastewater

A crude oil processing and acid-degraded technology, which is applied to the treatment field of wastewater discharged from an electric desalination device during the processing of high-acid and poor-quality crude oil, can solve the problems of inability to meet the expected purpose of reusing oily wastewater and salty wastewater to meet standards, and inability to effectively treat wastewater, etc.

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the survey, based on the same reason as above, it is generally difficult for the COD of the effluent of the oily sewage treatment series to be lower than 100mg / L, while the COD of the effluent of the saline sewage treatment series is as high as 200mg / L or more, which cannot meet the requirements of oily sewage reuse and salty sewage. Expected purpose of wastewater compliance
[0004] As mentioned above, the existing wastewater treatment methods cannot effectively treat the wastewater produced by high-acid crude oil production units, and wastewater treatment has become one of the obstacles restricting the use of high-acid crude oil, especially in areas where water resources are scarce and wastewater discharge standards are strict. The main obstacle for enterprises to process high-acid crude oil

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
  • Pretreatment method for high-acid inferior crude oil processing wastewater
  • Pretreatment method for high-acid inferior crude oil processing wastewater
  • Pretreatment method for high-acid inferior crude oil processing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The treatment method of the present invention is used to treat the wastewater discharged from the electric desalting device of a domestic high-acid and low-quality crude oil refining and chemical enterprise. The main pollutants in wastewater are COD 5400mg / L (chromium method, the same below), petroleum 600mg / L, total oil 2000mg / L, ammonia nitrogen 60mg / L, volatile phenol 50mg / L, sulfide 10.0mg / L, pH 8.5 .

[0028] Adopt oil separation-acidification demulsification-dissolved air flotation-UASB-SBR-filtration combined process of the present invention to carry out laboratory treatment test on the above-mentioned wastewater, the wastewater treatment scale is 200mL / h, the main experimental devices of each treatment unit are composed and operated The conditions and treatment effects are shown in Table 1. After being treated by the method of the present invention, the COD in the electric desalination wastewater can be reduced to below 300 mg / L, the petroleum can be reduced to...

Embodiment 2～3

[0035] Using the treatment device of Example 1 to treat the same sewage as in Example 1, the wastewater treatment effects obtained by changing the operating conditions of each treatment unit are shown in Table 2 and Table 3, respectively.

[0036] Main processing unit constitution and processing effect of table 2 embodiment 2

[0037]

[0038]

[0039] Main processing unit composition and processing effect of table 3 embodiment 3

[0040]

[0041]

Embodiment 4

[0043] The treated effluent of Example 1 is sent continuously to the sewage treatment plant, the displacement accounts for 30% of the treated water volume of the sewage treatment plant, the sewage treatment plant can operate normally and stably, and the drainage of the sewage treatment plant can reach the discharge standard (COD value is lower than 60mg / L) .

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 sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a pretreatment method for high-acid inferior crude oil processing wastewater. The method comprises the following steps of: treating electric desalting wastewater in the process of refining the high-acid inferior crude oil by using an oil removal-demulsification-gas dissolving floatation-up-flow anaerobic sludge bed reactor-intermittent activated sludge process combined process; and performing biochemical treatment on effluent obtained through treatment, or treating the effluent obtained through treatment by an additionally built secondary biochemical treatment unit, and discharging the treated effluent after the treated effluent reaches a discharge standard, wherein the demulsification is carried out under the condition that the pH value is 5-6. In the method, thehigh-acid inferior crude oil electric desalting wastewater is effectively treated by a proper treatment method, the treatment of sewage of other sources is not impacted, a benefit is brought to the stable operation of oil removal, floatation, biochemical and advanced treatment units in the finally sewage field, and the method is favorable for stably reaching the standard, and treating and recycling the high-acid inferior crude oil processing wastewater.

Description

technical field [0001] The invention relates to a pretreatment method for processing waste water of high-acid low-quality crude oil, which is suitable for treating waste water discharged from an electric desalting device in the process of processing high-acid low-quality crude oil. Background technique [0002] With the continuous development and utilization of crude oil, the output of heavy crude oil is increasing, and its density, viscosity, sulfur content, and acid value increase accordingly. According to preliminary statistics on the crude oil market in recent years, the global production of high-acid crude oil (acid value ≥ 0.5mg KOH / g) has accounted for 5.5% of the total development, and is increasing at an average annual rate of 0.3%. Due to the increasing shortage of crude oil resources and the obvious price advantage of high-acid crude oil, the centralized or large-scale processing of high-acid crude oil has become the development trend of refining and chemical indu...

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): C02F9/14C02F3/30C02F1/24
Inventor 郭宏山许谦刘淑鹤朱卫
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