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High-pressure water flushing type rotating circulating water electrolysis scale removal device and scale removal method

A high-pressure water and circulating water technology, applied in descaling and water softening, water/sewage treatment, chemical instruments and methods, etc., can solve the problem of reducing the working efficiency of electrolytic descaling equipment, insufficient scaling efficiency of cathode plates, and hard scale damage. and other problems, to achieve the effect of improving the working efficiency of electrolysis and descaling effect, improving the scaling efficiency of electrolysis, and enhancing the effect of mass transfer.

Active Publication Date: 2017-05-31
LIAONING DATANG INTERNATIONAL JINZHOU THERMAL POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for industrial circulating water, the application range of electrolytic descaling technology is increasing day by day, but in the actual application process, there are often problems such as insufficient scaling efficiency of the cathode plate and difficulty in completely removing hard scale with physical scrapers. For the actual treatment of circulating water systems with electrolytic descaling equipment The water retention time is greatly extended, and in severe cases, the actual descaling efficiency is difficult to offset the impact of the water replenishment on the circulating water system, which makes the total hardness of the industrial circulating water system rise, and eventually leads to scaling of heat exchangers and pipes
At the same time, the physical scraper has insufficient ability to remove hard scale, and it is easy to damage the scraper or block the scraper due to local hard scale, especially in some areas with high total hardness of water replenishment. The amount of scaling in 2-4 hours is enough to fill the distance between the cathode and the anode. The amount of scaling often blocks the scraper, causing the scraper motor to burn out, and significantly reducing the actual working efficiency of the electrolytic descaling equipment

Method used

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  • High-pressure water flushing type rotating circulating water electrolysis scale removal device and scale removal method
  • High-pressure water flushing type rotating circulating water electrolysis scale removal device and scale removal method
  • High-pressure water flushing type rotating circulating water electrolysis scale removal device and scale removal method

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Effect test

Embodiment 1

[0034] see Figure 1-2, a high-pressure water flushing type rotary circulating water electrolysis descaling device, the device includes a water outlet pipe 1, a head 2, a casing 3, a scraper 4, an equipment support 5, a slag discharge port 6, a water outlet 7, a first single-type rotary Joint 8, conductive slip ring 9, anode plate 10, anode plate and water pipe support rod 11, branch water pipe 12, central water pipe 13, normal reaction circulating water inlet pipe 14, second single rotary joint 15, two-position two-way solenoid valve 16. Water distribution nozzle 17, slag discharge control valve 18, bolt 19, scraper high-pressure water nozzle 20, anode plate and support rod fixing point 21, high-pressure flushing water pipe 22, high-pressure water pump 23, ordinary water pump 24, control system 25, water outlet Control valve 26, cathode terminal 27, anode terminal 28 and rib 29;

[0035] The upper part of the casing 3 is fixed with the head 2, a central water pipe 13 is arra...

Embodiment 2

[0048] The difference from Embodiment 1 is that the number of the scrapers 4 is two, the number of anode plates 10 is two, and the scraper 4 is fixed on the top and bottom ends of the central water pipe 13 by four ribs 29 respectively. Eight anode plates and water pipe support rods 11 are divided into four layers for fixed connection between anode plates 10 .

[0049] The current density of the electrolytic scaling process is 160A / m 2 , the electrolytic reaction time is 48h, and the descaling time is 15 minutes.

[0050] The test of the electrolytic descaling device and descaling method of this embodiment is selected in the 207 factory of Dongyao Group, and the circulating water volume of its circulating water system is 3000 m 3 / h, the water retention is 280m 3 , The temperature difference between the inlet and outlet of the circulating water cooling tower is 5 °C, and the water hardness is 250ppm. When the electrolysis device is not used, the total hardness of the circula...

Embodiment 3

[0052] The difference from Embodiment 1 is that the number of scrapers 4 is 8, the number of anode plates 10 is 8, and the scraper 4 is fixed on the top and bottom ends of the central water pipe 13 by 8 ribs 29 respectively. Between the anode plates 10, 32 anode plates and the water pipe support rods 11 are equally divided into four layers for fixed connection;

[0053] The current density of the electrolytic scaling process is 100A / m 2 , the electrolytic reaction time is 20h, and the descaling time is 10 minutes.

[0054] The test of the electrolytic descaling device and descaling method of this embodiment is selected in the 207 factory of Dongyao Group, and the circulating water volume of its circulating water system is 3000 m 3 / h, the water retention is 280m 3 , The temperature difference between the inlet and outlet of the circulating water cooling tower is 5°C, and the water hardness is 220ppm. When the electrolysis device is not used, the total hardness of the circul...

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Abstract

The invention discloses a high-pressure water flushing type rotating circulating water electrolysis scale removal device and a scale removal method, which are applicable to the technical field of circulating water treatment. The problems that a scraping knife is damaged, the work efficiency is obviously reduced and the like caused by insufficient scale removal capacity of the scraping knife of the existing electrolysis scale removal equipment to hard scale are solved. The electrolysis scale removal device comprises a water outlet pipe (1), a seal head (2), a shell (3), the scraping knife (4), an equipment bracket (5), a deslagging opening (6), a water outlet (7), a first single rotating connector (8), a conductive sliding ring (9), an anode plate (10), an anode plate and water pipe supporting rod (11), a branch water pipe (12), a central water pipe (13) and the like. The invention also provides the scale removal method of the high-pressure water flushing type rotating circulating water electrolysis scale removal device, which mainly comprises an electrolysis scale removal process and a cleaning scale removal process. The scale removal device disclosed by the invention has the characteristics that the energy consumption is low, scale is scraped cleanly; the electrolysis work efficiency and the scale removal effect can be effectively improved by the scale removal method disclosed by the invention.

Description

technical field [0001] The invention relates to the technical field of circulating water treatment, in particular to a high-pressure water flushing type rotary circulating water electrolysis descaling device and a descaling method. Background technique [0002] At present, for industrial circulating water, the application scope of electrolytic descaling technology is increasing day by day, but in the actual application process, there are often problems such as insufficient cathode plate fouling efficiency and the difficulty of physical scraper to completely remove hard scale. The retention time of water is greatly prolonged, and in severe cases, the actual descaling efficiency is difficult to offset the influence of the replenishment water on the circulating water system, which makes the overall hardness of the industrial circulating water system tend to rise, which eventually leads to scaling of heat exchangers and pipes. At the same time, the physical scraper has insuffici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00
CPCC02F1/46104C02F5/00C02F2303/20C02F2303/04C02F2303/22C02F2201/461C02F2001/46138Y02E60/36
Inventor 潘良郭占吉杨絮胡义明郭帝康艳超
Owner LIAONING DATANG INTERNATIONAL JINZHOU THERMAL POWER CO LTD