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Heavy metal ion passivation stabilizer for flowback fluid treatment residues and preparation method

A technology for heavy metal ions and flowback liquid, which is applied in chemical instruments and methods, water/sewage treatment, mining wastewater treatment, etc. Activity, the effect of solving the toxicity and pollution of heavy metal ions, and the convenience of use

Active Publication Date: 2021-03-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the heavy metal ion toxicity and pollution problems caused by existing waste liquid residues to the environment, the present invention provides a heavy metal ion passivation stabilizer for flowback liquid treatment residues and the preparation method, the formula provided by the invention can effectively improve the heavy metal ion stabilization efficiency of oilfield measure flowback liquid treatment residue, effectively reduce the heavy metal activity in the waste liquid residue of the measure, and solve the heavy metal ion toxicity and pollution caused by the waste liquid residue to the environment question

Method used

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  • Heavy metal ion passivation stabilizer for flowback fluid treatment residues and preparation method
  • Heavy metal ion passivation stabilizer for flowback fluid treatment residues and preparation method
  • Heavy metal ion passivation stabilizer for flowback fluid treatment residues and preparation method

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Embodiment 1

[0021] In order to overcome the toxicity and pollution of heavy metal ions caused by the existing waste liquid residues to the environment, the present invention provides a heavy metal ion passivation stabilizer and preparation method for flowback liquid treatment residues. The formula provided by the present invention can effectively improve oil field measures The heavy metal ion stabilization efficiency of the flowback liquid treatment residue can effectively reduce the activity of heavy metals in the waste liquid residue, and solve the problem of heavy metal ion toxicity and pollution caused by the waste liquid residue to the environment.

[0022] A heavy metal ion passivation stabilizer for flowback liquid treatment residue, which is composed of the following components in weight ratio: 0.5-1% sodium sulfide, 20-30% potassium dihydrogen phosphate, 10-15% dithiocarbamate %, heavy metal adsorbent 55-65%.

[0023] Preferably, the heavy metal adsorbent includes lycyrrhizae and...

Embodiment 2

[0036] Based on the basis of Example 1, in this example, preferably, a heavy metal ion passivation stabilizer for flowback liquid treatment residue is composed of the following components in weight ratio: 0.6% sodium sulfide, 22.4% potassium dihydrogen phosphate %, dithiocarbamate 13.5%, heavy metal adsorbent 63.5%.

[0037] The preparation process of the heavy metal adsorbent in this example is as follows: pulverize lycyrrhizae and lycyrrhizae into powder, grind the mushroom residues of Pleurotus ostreatus and air-dry them in the sun for simple sterilization. The weight component of 42wt% oyster mushroom residue is stirred evenly. Take 0.6% of sodium sulfide, 22.4% of potassium dihydrogen phosphate, 13.5% of dithiocarbamate, and 63.5% of heavy metal adsorbent by weight of the formula, mix them in sequence, stir evenly; pack into bags and seal to form a finished product. Apply the heavy metal ion passivation stabilizer formula of the present invention to treat oilfield measur...

Embodiment 3

[0041] Based on the basis of Example 1, in the present example, a heavy metal ion passivation stabilizer for flowback liquid treatment residue is composed of the following components by weight ratio: sodium sulfide 0.5%, potassium dihydrogen phosphate 25%, dihydrogen phosphate Thiocarbamate 15%, heavy metal adsorbent 59.5%.

[0042] The preparation process of the heavy metal adsorbent in this example is as follows: pulverize lycyrrhizae and lycyrrhizae into powder, grind the pleurotus ostreatus slag and air-dry it in the sun for simple sterilization. After passing through an 80-mesh sieve, the The weight component of 43wt% oyster mushroom residue is stirred evenly. The sodium sulfide, potassium dihydrogen phosphate, dithiocarbamate, and heavy metal adsorbent are mixed in sequence by the weight of the formula, stirred evenly; bagged and sealed to form a finished product. Apply the formula of the heavy metal ion passivation stabilizer provided by the present invention to proces...

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Abstract

The invention provides a heavy metal ion passivation stabilizer for flowback fluid treatment residues and a preparation method. The stabilizer is prepared from the following components in percentage by weight: 0.5-1 percent of sodium sulfide, 20-30 percent of monopotassium phosphate, 10-15 percent of dithiocarbamate and 55-65 percent of a heavy metal adsorbent. Wherein the heavy metal adsorbent comprises lysimachia foenum-graecum and mushroom dregs. According to the heavy metal ion passivation stabilizer, the mobility of heavy metal ions in the environment can be reduced, the toxicity of the heavy metal ions to microorganisms is inhibited, the stabilizing efficiency of Cu, Zn, Cd, Pb, Hg and Ni reaches 88% or above to the minimum and the stabilizing efficiency of Cr reaches 83% or above tothe minimum after the heavy metal ion passivation stabilizer formula provided by the invention is applied to treatment of oil field measure flowback fluid treatment residues for 7 days.

Description

technical field [0001] The invention relates to the field of advanced treatment of bottom mud or residue after treatment of oilfield waste liquid, in particular to a preparation method of a heavy metal ion passivation stabilizer for flowback liquid treatment residue. Background technique [0002] During the production process of the oil field, various operational measures will be taken according to production needs, such as fracturing, acidizing, profile control, hot washing, etc. These measures make the reverse drainage fluid contain a large amount of chemical substances, such as pickling reverse drainage fluid contains a large amount of Surfactants and fracturing fluid contain high molecular substances such as guar gum; these chemicals entering the gathering and transportation system will seriously disrupt the normal operation of the production system. These chemical substances form a large amount of measure waste liquid, which enters the sewage treatment station for corre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F1/28B01J20/24C02F101/20C02F103/10
CPCC02F1/62C02F1/286B01J20/24C02F2101/20C02F2103/10
Inventor 杨琴张海玲周立辉穆谦益冀忠伦李岩蒋继辉任小荣任鹏赵敏薛建强
Owner PETROCHINA CO LTD
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