Oxidizing agent for harmless treatment of drilling waste solid water-based mud, and preparation method and application thereof

An oxidant and mud technology, which is applied in mining wastewater treatment, oxidation treatment of sludge, etc., to achieve the effects of simple operation, improved oxidation activity, and strong oxidation effect.

Active Publication Date: 2020-06-12
CHENGDU KEHENG ENVIRONMENTAL PROTECTION TECH
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AI-Extracted Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an oxida...
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Abstract

The invention relates to treatment of drilling waste solid water-based mud, in particular to an oxidizing agent for harmless treatment of drilling waste solid water-based mud, and preparation method and application thereof. The oxidizing agent is prepared from the following components in parts by weight: 30 to 50 parts of active agent, 5 to 15 parts of dicalcium phosphate, 5 to 15 parts of sodiumpyrophosphate, 5 to 15 parts of methylene dithiocyanate and 20 to 40 parts of water. The oxidizing agent has good water solubility and strong oxidizing effect, can thoroughly decompose organic mattersin the waste solid water-based mud into inorganic matters, and effectively protects the environment.

Application Domain

Waste water treatment from quariesSludge treatment by oxidation

Technology Topic

Active agentEnvironmental chemistry +12

Image

  • Oxidizing agent for harmless treatment of drilling waste solid water-based mud, and preparation method and application thereof
  • Oxidizing agent for harmless treatment of drilling waste solid water-based mud, and preparation method and application thereof
  • Oxidizing agent for harmless treatment of drilling waste solid water-based mud, and preparation method and application thereof

Examples

  • Experimental program(3)
  • Effect test(1)

Example Embodiment

[0027] Example 1. Preparation of oxidant
[0028] The oxidant formula of the present invention: in parts by weight, 30-50 parts of active agent, 5-15 parts of dicalcium hydrogen phosphate, 5-15 parts of sodium pyrophosphite, 5-15 parts of methylene dithiocyanate, 20-40 parts of water.
[0029] In order to evaluate the performance of the oxidant of the present invention, the following oxidants 1-3 were prepared:
[0030] No. 1 oxidizer: in parts by weight, 30 parts of active agent, 15 parts of dicalcium hydrogen phosphate, 5 parts of sodium pyrophosphite, 15 parts of methylene dithiocyanate, and 20 parts of water.
[0031] No. 2 oxidizer: in parts by weight, 50 parts of active agent, 10 parts of dicalcium hydrogen phosphate, 10 parts of sodium pyrophosphite, 5 parts of methylene dithiocyanate, 25 parts of water.
[0032] No. 3 oxidant: in parts by weight, 40 parts of active agent, 5 parts of dicalcium hydrogen phosphate, 15 parts of sodium pyrophosphite, 10 parts of methylene dithiocyanate, 40 parts of water.
[0033] The preparation method of oxidant is as follows :
[0034] Step 1. Synthesis of active agent
[0035] The formulation of the active agent: in parts by weight, 5 parts urea, 15 parts glycolic acid, 15 parts nitrilotriacetic acid, 10 parts hydrogen peroxide (10%) and 5 parts water.
[0036] The synthetic steps of the active agent are:
[0037] (1) Dissolve 5 parts of urea in water to prepare an aqueous solution of urea with a mass fraction of 20% for use;
[0038] (2) Add 15 parts of glycolic acid, 15 parts of nitrilotriacetic acid, 10 parts of hydrogen peroxide (10%) and 5 parts of water into the reaction kettle, heating and stirring (stirring intensity 120-180 rpm), when the temperature rises Stir at a constant temperature at 120°C, stir and react for 2 hours, then slowly add the urea aqueous solution prepared in step (1), and continue to stir and react at 120°C for 1 hour. After the reaction is completed, the stirring is stopped, and the active agent is obtained after natural cooling.
[0039] Step 2. The compound of oxidant
[0040] Weigh each component according to the formula. Add dicalcium phosphate, sodium pyrophosphite, methylene dithiocyanate and water into the reaction kettle, stir at room temperature at a speed of 120 rpm, and add the active agent synthesized in step 1 after the dissolution is complete. Continue to stir at a speed of 120 revolutions per minute, and obtain a liquid product after evenly stirring. The liquid product can be further dried and crystallized at a temperature of 105°C to obtain the final product.

Example Embodiment

[0041] Example 2. Evaluation of water solubility of oxidant
[0042] The water solubility of the oxidant of the present invention is tested according to the following method: Take 3 glass beakers, each beaker is filled with 100ml of water, and respectively add the No.1-3 oxidant prepared in Example 1 into the 3 beakers. The dosage of the oxidant is 30 grams After shaking well, let it stand at room temperature for 5 minutes to observe the dissolution of oxidant. The results are shown in Table 1. The oxidizing agent Nos. 1-3 has good water solubility.
[0043] Table 1 Water solubility evaluation table of oxidant
[0044] Oxidant Solution appearance Dissolution rate (%) Oxidizer No. 1 Soluble 100 No. 2 oxidizer Soluble 100 No. 3 oxidizer Soluble 100

Example Embodiment

[0045] Example 3. Evaluation of the effect of oxidants
[0046] The No.1-3 oxidizer prepared in Example 1 was used to treat the waste solid water-based mud from drilling to evaluate the oxidation effect. The low-concentration solid water-based mud waste used in this experiment was taken from an oil field in Wuqia County, Xinjiang, and the high-concentration sulfonated water-based mud waste used was taken from the Xinjiang Tarim Oilfield.
[0047] The mud treatment method is: take a certain amount of waste solid water-based mud, weigh it and put it into a beaker, add 3%-10% of the total weight of the solid oxidant, stir evenly, make the oxidant and the mud fully mix, and keep the mud The moisture content of the beaker is above 30% (the method of maintaining the moisture content is sealing: after mixing the oxidant and water-based mud, wrap or sleeve the beaker with plastic wrap or a sealed bag the same size as the beaker, and then use rubber bands Tie it tightly), place it at room temperature for 3-5 days to fully react the oxidant and water-based mud, and finally take a sample to detect the organic content in the reaction product.

PUM

PropertyMeasurementUnit
Density1.84g/ml
Cod value<= 500.0mg/l

Description & Claims & Application Information

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