JPS61293596A - Cooling and circulating water, water quality-controlling agent - Google Patents

Abstract

PURPOSE:To prevent the undermentioned equipment from sticking algae, fur, iron rust, carbonate, etc., onto said equipment by mixing the aqueous solution of stabilized chlorine dioxide with a metallic ion-sealing agent and a rust- preventing agent to make a mixture as the circulating water for a cooling tower and the heat-exchanger of a refrigerator. CONSTITUTION:0.5-30%, preferably 5% aqueous solution of stabilized chlorine dioxide or chlorite is added with 0.5-10%, preferably 3% water-soluble rust- preventing agent and 0.1-10%, preferably 5% metallic ion-sealing agent to make an aqueous solution, which is added into the circulating water for a cooling tower and the heat-exchanger of a refrigerator. As a result, cooling water is extremely effective for removing algae and preventing its growth, for removing fur and iron rust and preventing their generation and for removing carbonate, etc., and preventing their sticking.

Description

Detailed Description of the Invention (A) Industrial Application Field Stabilized chlorine dioxide or chlorite from 0.5% to 30%
% Preferably 0.5% to 5% water-soluble rust inhibitor in a 5% aqueous solution
10% preferably 3% sequestering agent 0.1-1
By adding 0.1 to 2% (depending on the water quality and degree of pollution) of an aqueous solution containing 0%, preferably 5%, to the total amount of circulating water for cooling, you can remove and prevent the generation of water algae and reduce water scale. It is particularly effective in removing and preventing the occurrence of iron chains, and in removing and preventing carbonates from adhering to heat exchangers.

(B) Conventional technology Conventionally used additives are used to remove water algae and water scale iron chains, but because they are highly acidic, regular use can seriously damage the joints of iron piping. (C) Problems to be solved by the invention The additives of the new invention were adjusted to a pH of around 7 to 8, and were added to the circulating water. In this case, the circulating water becomes almost neutral, making it possible to use it constantly.

Furthermore, carbonates stubbornly attached to the steel pipes inside the heat exchanger, which could never be removed using conventional additives, can be completely removed in just one week after addition.

(D) Effects of the Invention Next, the effects of the present invention will be described. As described in C), there is an effect by removing carbonate deposits that could not be removed with conventional additives.

1. The condensation temperature of the refrigerant gas in the refrigerator is lowered, resulting in significant savings in electricity costs.

2. The life of the refrigerator is significantly extended because the pressure on the high pressure side of the refrigerator is reduced.

3. As the condensing temperature decreases, the liquid refrigerant temperature also decreases, so the refrigeration capacity increases significantly.

4. Since the cooling water is neutral, the progress of rust on steel pipes and other iron piping parts is less than in the past, significantly extending the lifespan.

5. Like conventional additives, it removes and prevents the formation of water algae, blue powder, water scale, iron rust, etc.

(4) Example 1. Added from cooling tower water layer in March (CJ!02 content in cooling water 1001) [) III) A Cooling water temperature B Refrigerator high pressure C Refrigerator current 2, 59 years
Month 60 ABCABC 420,4c 11,5 256kw 22.
8 10. (L 2465 25.2 13,0
288 26,8 10,5 2606 2
8.6 16,0 314 32,1 10,
5 2737 32.9 17,5 329
35,2 12.0 2998 34.7 17
,5 346 36,4 12,0 3149
33.9 17.5 331 35.1 1
2.0 31110 23.8 14,0 29
3 26,9 10,0 27711 17.3
12,5 272 20,8 9,0 2
4412 12.5 12,0 282 14.
8 9,5 2691 9.9 10,0
249 12.0 8.5 2322 9.7
10,0 245 10,2 8.5 2
353 15.8 10,5 251 18,3
9.0 2363, A The measured value of the cooling water temperature is the average value measured 10 times in one month.

B. The high pressure value of the refrigerator is a monthly average value measured once a day.

C total current is a monthly average value measured once a week.

Masako Fukuoka

Claims (1)

[Claims] Stabilized chlorine dioxide aqueous solution, (ClO_2 and NaClO
Addition to remove and prevent deposits from circulating water in cooling towers, heat exchangers for refrigerators, etc. by mixing metal ion sequestering agents (chelating agents) and rust preventive agents (including __2) agent.