Method for recycling reclaimed water in circulating cooling water system

A technology for circulating cooling water and reclaimed water, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve problems such as pipeline corrosion, reduce difficulty and reduce secondary pollution The effect of low risk and fouling risk

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that when the reclaimed water is reused in the circulating cooling water system at present, there is a problem that the reclaimed water corrodes the pipeline during the transportation process and the problem that a phosphorus-containing corrosion inhibitor needs to be added to the circulating cooling water, the purpose of the present invention is to provide an effective Method for inhibiting corrosion of reclaimed water delivery pipeline and circulating cooling water system, and reusing reclaimed water without phosphorus-containing corrosion inhibitor for circulating cooling water

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
  • Method for recycling reclaimed water in circulating cooling water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Take 1# reclaimed water as the test water, add quicklime to it, and calculate per liter of reclaimed water, quicklime (as CaCO 3 The input amount is 40mg / L, and the softened reclaimed water is obtained through solid-liquid separation. Add anhydrous sodium borate to the softened reclaimed water, so that the concentration of anhydrous sodium borate (calculated as B) in the softened reclaimed water is 140mg / L, and conduct the corrosion evaluation test of reclaimed water pipeline transportation. Concentrate the above-mentioned reclaimed water by 3 times, and simulate the state where the reclaimed water added with the aforementioned corrosion inhibitor in the production site is added to the recirculating cooling water in the recirculating cooling water system as replenishment water of the recirculating cooling water to obtain simulated recirculating cooling water. Add polymaleic acid (Changzhou Wujin Water Quality Stabilizer Factory, Nanjing Institute of Chemical Technology,...

Embodiment 2

[0049] Take 2# reclaimed water as the test water, add slaked lime thereinto, in terms of per liter of reclaimed water, the slaked lime in reclaimed water (as CaCO 3 The input amount is 110mg / L, and the softened reclaimed water is obtained through solid-liquid separation. Sodium borate decahydrate was added to the softened reclaimed water so that the concentration of sodium borate decahydrate (calculated as B) in the softened reclaimed water was 70 mg / L, and the corrosion evaluation test for reclaimed water pipeline transportation was carried out. Concentrate the above-mentioned reclaimed water by 4.5 times, and simulate the state where reclaimed water added with the aforementioned corrosion inhibitor in the production site is added to the recirculating cooling water in the recirculating cooling water system as replenishment water for recirculating cooling water to obtain simulated recirculating cooling water. Add polyepoxysuccinic acid (Changzhou Global Chemical Co., Ltd., bra...

Embodiment 3

[0051] Take 3# reclaimed water as the test water, add slaked lime thereinto, in terms of per liter of reclaimed water, the slaked lime in reclaimed water (as CaCO 3 The input amount is 220mg / L, and the softened reclaimed water is obtained through solid-liquid separation. Add anhydrous potassium borate to the softened reclaimed water, so that the concentration of anhydrous potassium borate (calculated as B) in the softened reclaimed water is 120mg / L, and conduct corrosion evaluation test for reclaimed water pipeline transportation. Concentrate the above-mentioned reclaimed water by 2.5 times, and simulate the state where reclaimed water added with the aforementioned corrosion inhibitor in the production site is added to the recirculating cooling water in the recirculating cooling water system as replenishment water for recirculating cooling water to obtain simulated recirculating cooling water. Add acrylic acid-hydroxypropyl acrylate-2-acrylamide-2-methylpropanesulfonic acid co...

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
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for recycling reclaimed water in a circulating cooling water system. The method comprises the following steps: (1) adding lime to the reclaimed water to carry out softening treatment and then carrying out solid-liquid separation; (2) adding borate corrosion inhibitors to the reclaimed water obtained after solid-liquid separation in the step (1); (3) adding the reclaimed water to which the borate corrosion inhibitors are added in the step (2) to circulating cooling water of the circulating cooling water system as replenished water of circulating cooling water; (4) adding polymer scale inhibitors and dispersants to the circulating cooling water to which the reclaimed water is added in the step (3). By adopting the method provided by the invention, safety of reclaimed water transport can be guaranteed, the circulating cooling water treatment difficulty is reduced and introduction of phosphorus is avoided in the whole process.

Description

technical field [0001] The invention relates to a method for recycling reclaimed water to a circulating cooling water system. Background technique [0002] Nowadays, water resources are increasingly scarce. In order to realize the sustainable use of water resources, reclaimed water, as a reliable and reusable second water source, has attracted more and more attention. Reclaimed water mainly refers to non-drinking water that can be reused within a certain range after urban sewage or domestic sewage has reached a certain water quality standard after treatment. standard. The reuse of reclaimed water has been implemented abroad for a long time, and the reuse scale is very large, showing obvious economic benefits. [0003] my country's industrial water consumption is huge, among which circulating cooling water accounts for the largest proportion, and the water quality requirements of the circulating cooling water system for its supplementary water are slightly lower than those ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/10
Inventor 王岽吴颖郦和生魏新王洪英
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap