Polymer-containing sludge depolymerization agent and preparation method thereof

A depolymerization agent and sludge technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of increased amount of crude oil terminal sludge, no patent publications, and insufficient processing capacity, etc., to reduce emulsification, Good dehydration and lower production cost

Inactive Publication Date: 2015-09-16
CNOOC ENERGY TECH & SERVICES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The emergence of aggregated sludge has led to a sharp increase in the amount of sludge at the crude oil terminal, and insufficient processing capacity, and because the properties of aggregated sludge have changed greatly compared with ordinary sludge, conventional centrifugal separation equipment, plate a

Method used

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  • Polymer-containing sludge depolymerization agent and preparation method thereof
  • Polymer-containing sludge depolymerization agent and preparation method thereof
  • Polymer-containing sludge depolymerization agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of polymer-containing sludge depolymerization agent, its composition and parts by weight are:

[0032]

[0033] The preparation method of above-mentioned polymer-containing sludge depolymerization agent, the steps are as follows:

[0034] (1) Add 550kg of water to a 1.5-square reaction stirred tank.

[0035] (2) Slowly add 80kg of AMPS (powder) and 40kg of AM (powder) into the reaction stirring tank until they are completely dissolved.

[0036] (3) Add 280kg of DMDAAC into the reactor, slowly heat up to 40°C, and feed nitrogen (99.9%) into the reactor at a rate of 1m 3 / Hour.

[0037] (4) Add the initiator ammonium persulfate solution (40kg pure water+40g ammonium persulfate) dropwise, and drop it in 10 minutes.

[0038] (5) Add the cross-linking agent methylenebisacrylamide solution (10 kg of pure water + 6 g of methylenebisacrylamide) dropwise, and finish dropping in 30 minutes.

[0039] (6) Raise the temperature to 50°C to 55°C and stir for 4 hours to r...

Embodiment 2

[0057] A kind of polymer-containing sludge depolymerization agent, its composition and parts by weight are:

[0058]

[0059] The preparation method of above-mentioned polymer-containing sludge depolymerization agent, the steps are as follows:

[0060] (1) Add 662.5kg of water to a 1.5-square reaction stirred tank.

[0061] (2) Slowly add 60kg of AMPS (powder) and 30kg of AM (powder) into the reaction stirring tank until they are completely dissolved.

[0062](3) Add 280kg of DMDAAC into the reactor, slowly heat up to 40°C, and feed nitrogen (99.9%) into the reactor at a rate of 1m 3 / Hour.

[0063] (4) Add the initiator ammonium persulfate solution (30kg pure water+30g ammonium persulfate) dropwise, and finish dropping in 10 minutes.

[0064] (5) Add the cross-linking agent methylenebisacrylamide solution (7.5kg of pure water + 4.5g of methylenebisacrylamide) dropwise, and finish dropping in 30 minutes.

[0065] (6) Raise the temperature to 50°C to 55°C and stir for 4 ...

Embodiment 3

[0083] A kind of polymer-containing sludge depolymerization agent, its composition and parts by weight are:

[0084]

[0085] The preparation method of above-mentioned polymer-containing sludge depolymerization agent, the steps are as follows:

[0086] (1) Add 487.5kg of water to a 1.5-square reaction stirred tank.

[0087] (2) Slowly add 100kg of AMPS (powder) and 50kg of AM (powder) into the reaction stirring tank until they are completely dissolved.

[0088] (3) Add 350kg of DMDAAC into the reactor, slowly heat up to 40°C, and feed nitrogen (99.9%) into the reactor at a rate of 1m 3 / Hour.

[0089] (4) Add the initiator ammonium persulfate solution (50kg pure water+50g ammonium persulfate) dropwise, and finish dropping in 10 minutes.

[0090] (5) Add the cross-linking agent methylenebisacrylamide solution (12.5kg of purified water + 7.5g of methylenebisacrylamide) dropwise, and finish dropping in 30 minutes.

[0091] (6) Raise the temperature to 50°C to 55°C and stir...

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Abstract

The invention relates to a polymer-containing sludge depolymerization agent. The polymer-containing sludge depolymerization agent comprises, by weight, 6-10 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2-6 parts of acrylamide, 24-35 parts of dimethyldiallylammonium chloride, 56-70 parts of purified water, 0.002-0.006 parts of an initiator and 0.0004-0.0008 parts of a cross-linking agent. Raw materials used by the depolymerization agent are domestic resources, and have abundant sources and low prices; and the depolymerization agent can effectively remove polymers, is suitable for polymer-containing sludge, achieves removal of polymers in the polymer-containing sludge, mitigation of the emulsification phenomenon of oil sludge and promotion of high dehydration of the oil sludge, realizes the reduction and recycling of the polymer-containing sludge, solves the problems of much oil sludge, large processing difficulty, high processing cost and severe environment harms of the polymer-containing sludge of offshore oilfields in the production process, and provides an escort for long-term stable production of the oilfield.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, and relates to a sludge depolymerization agent, in particular to a depolymerization agent for aggregated sludge and a preparation method thereof. Background technique [0002] As some offshore oilfields have entered the secondary and tertiary production periods, polymer injection flooding is gradually adopted for production, but the polymers used in the production process cannot be completely removed, and some polymers enter the crude oil terminal along with the production fluid, and the A large amount of sludge containing polymers is gradually generated in the treatment unit. At present, there is little understanding of aggregated sludge in China. Compared with ordinary oily sludge, aggregated sludge has the characteristics of easy formation, high polymer content, serious emulsification degree, more difficult dehydration, and sharp increase in viscosity. A large...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F220/56C08F226/02C02F11/14
Inventor 宿辉郄振敏孟庭宇王玉唐翰徐菲李凤娟
Owner CNOOC ENERGY TECH & SERVICES
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