Decalcifying device and decalcifying method for crude oil

A crude oil and decalcifying agent technology, applied in the petroleum industry, treating hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of incomplete separation of water and crude oil, increased difficulty in crude oil treatment, large sewage discharge, etc., and achieve good removal Effect, reduce decalcification cost, reduce the effect of sewage discharge

Active Publication Date: 2017-09-26
CESTOIL IND SERVICES SHENZHEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This decalcification method usually only adopts batch process, which has heavy workload, low decalcification efficiency, high production cost, large sewage discharge, serious environmental pollution, and incomplete separation of water and crude oil, which affects the quality of crude oil and affects crude oil. Subsequent processing increases the difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Soak the hydrophilic molecular sieve in an aqueous solution of decalcifying agent made of 30wt% citric acid, 1wt% dodecylphenol polyoxyethylene ether and 69wt% water for 30 minutes, filter and drain, and then fill the loaded decalcifying agent Into the fixed bed, set the temperature of the fixed bed to 50°C, put the crude oil containing 46.0ppm calcium and 7.5ppm magnesium in 10h -1 The space velocity of the crude oil flows through the fixed bed, and the decalcification rate of crude oil after treatment is measured to be 80.3%, and the rate of magnesium removal to be 45.2%.

Embodiment 2

[0025] Soak the hydrophilic molecular sieve in an aqueous solution of decalcification agent made of 35wt% citric acid, 0.6wt% polyoxyethylene lauryl alcohol amide and 64.4wt% water for 60 minutes, filter and drain, then decalcify the load The agent is filled into the fixed bed, the temperature of the fixed bed is set at 55°C, and the crude oil containing 57.0ppm of calcium and 8.6ppm of magnesium is heated for 12h -1 The space velocity of the crude oil flows through the fixed bed, and the decalcification rate of crude oil after treatment is measured to be 85.0%, and the rate of magnesium removal to be 50.2%.

Embodiment 3

[0027] Soak the hydrophilic silica gel in an aqueous decalcifying agent solution made of 40wt% maleic acid, 1.5wt% lauryl alcohol polyoxyethylene ether ammonium carboxylate and 58.5wt% water for 90 minutes, filter and drain, and then Fill the loaded decalcifying agent into the fixed bed, set the temperature of the fixed bed to 60°C, add the crude oil containing 51.0ppm calcium and 7.7ppm magnesium for 9h -1 The space velocity of the crude oil flows through the fixed bed, and the decalcification rate of crude oil after treatment is measured to be 88.0%, and the rate of magnesium removal to be 60.9%.

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PUM

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Abstract

The invention discloses a decalcifying device and a decalcifying method for crude oil and relates to the technical field of crude oil pretreatment in the technical field of oil refining. The invention provides the following technical scheme that the decalcifying method comprises the following steps: loading an aqueous solution of a decalcifying agent into a hydrophilic carrier, and filling a fixed bed with the hydrophilic carrier; when the crude oil flows through the fixed bed, enabling metal ions such as calcium and magnesium in the crude oil to be in contact and be combined with active ingredients of the decalcifying agent on the surface of a water film loading the decalcifying agent and transferring a combined substance into the water film, thereby realizing decalcification of the crude oil; after the loaded decalcifying agent is sufficiently used, taking out the loaded decalcifying agent, leaching the loaded decalcifying agent with lightweight oil to remove the crude oil in the surface or pores of the loaded decalcifying agent; then putting the loaded decalcifying agent into the fresh aqueous solution of the decalcifying agent, and enabling a calcium complex in the carrier water film to be displaced, thereby realizing regeneration of the loaded decalcifying agent. The decalcifying device for the crude oil, provided by the invention, has the advantages of simple structure, convenience in operation and obvious economic benefits; continuous decalcification can be realized; the decalcifying agent can be regenerated and recycled, so that the decalcifying cost of the crude oil is greatly reduced; sewage discharge is reduced.

Description

technical field [0001] The invention relates to the technical field of crude oil pretreatment in the technical field of oil refining, and more specifically, relates to a crude oil decalcification device and a decalcification method. Background technique [0002] In recent years, with the heavy and inferior quality of crude oil and the deep exploitation of crude oil, the content of metal ions in crude oil is getting higher and higher, especially calcium and magnesium ions. Part of the calcium in crude oil exists in the form of water-soluble salts and slightly soluble salts such as calcium chloride, calcium bicarbonate, calcium sulfate, calcium phosphate, etc., and the other part exists in the form of calcium petroleum acid. In the process of electric desalting in refineries, most of the soluble salts and hydrophilic inorganic calcium salt particles can be generally removed; however, the lipophilic inorganic calcium salt particles and calcium petroleum acid present in the oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22
CPCC10G29/22C10G2300/202
Inventor 袁杰胡涛英严斌熊靓
Owner CESTOIL IND SERVICES SHENZHEN CO LTD
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