KR20130040758A - The electrolysis system for the removal of slimes - Google Patents

Abstract

PURPOSE: A slime removing apparatus is provided to maintain a heat exchanger clean, to stably supply water to a water tank, and to reduce maintenance costs of the heat exchanger. CONSTITUTION: A slime removing apparatus with a heat exchanger comprises an electrolysis cell(310), a DC power supplying unit(320) and a flow control unit(330). The electrolysis cell has an anode and a cathode for generating fungicide. The flow control unit controls water containing fungicide through the heat exchanger. [Reference numerals] (AA) Neutralizing agent;

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic system for removing slime,

The present invention relates to a slime removal apparatus for bio-adhesion prevention for heat exchanger, and more particularly, by circulating a sterilant generated by electrolysis of salt water to a heat exchanger, to prevent organisms from adhering to the heat exchanger and to remove slime formed in the heat exchanger. The present invention relates to an anti-adhesion combined slime removal device for heat exchangers.

Live fish tanks that farm fresh or saltwater fish are used to farm live fish.

Figure 1 is a process configuration for farming freshwater fish and seawater fish is composed of a reservoir 110 and a heat exchanger (120, heat exchanger). Here, the heat exchanger 120 performs a heat transfer between the two fluids of the high temperature liquid and the low temperature liquid to serve to supply the water of the appropriate water temperature to the reservoir 110. The main problem with this configuration is the slime (microbial community) that occurs in the heat exchanger.

2 shows a process in which the organism is attached to the tube of the heat exchanger, looking at the process as follows. First, organic matter (protein) is attached to the surface of the heat exchanger (S210). On the basis of this organic material, bacteria grow and grow to form a bacterial layer (S220). Thereafter, organic matter or sludge (sludge) in seawater is attached to the bacterial layer to form a slime layer (S230). Up to this point, it takes several hours from the organic material (protein) attachment step to the slime layer formation step as the initial contamination step. Thereafter, algae grow on the slime layer (S240), and the larvae of living organisms are attached / reproduced / grown by using the algae as a scaffold (S250). When the organisms are attached in this way, the heat exchanger is closed and seawater cannot be smoothly supplied to the live fish tank, which causes a problem in that the live fish is dead due to a decrease in cooling (or temperature) efficiency. Therefore, it is important to manage to prevent organisms from adhering to the heat exchanger.

As a technique for preventing organisms from attaching to the heat exchanger, conventionally, chemical methods, physical methods, mechanical methods, and the like have been used. Chemical methods include oxidizing disinfectants such as chlorine and hydrogen peroxide, and physical methods include ultraviolet irradiation, ultrasonic methods, and high temperature water treatment methods. Mechanical methods include filters and cleaning robots. Method and the like. However, these conventional methods have problems such as ineffectiveness, short lifespan, and high cost.

As an electrochemical sterilization method to solve the problems of these conventional methods, instead of using chemicals, seawater is electrolyzed to produce chlorine disinfectants (hypochlorite, chlorine, sodium hypochlorite), or metals (copper and silver). A method of eluting ions has been proposed.

Publications describing methods of removing marine life by electrochemical methods include Japanese Patent Laid-Open No. 61-143587, Japanese Patent Laid-Open No. 61-213384, Japanese Patent Laid-Open No. 2-209696, and Japanese Patent Laid-Open No. 7-207645 Etc. In addition, a mixed type of electrochemical and electrical methods is Korean Patent Application No. 2006-65175. Korean Patent Application No. 2006-65175 is a technique for preventing marine organisms from attaching by using hypochlorous acid by electric shock and electrolysis. However, the above-described prior arts have a problem in that the configuration of the device is complicated and the potential must be precisely controlled.

In general, the principle of producing a disinfectant by electrolysis of brine and the generation of by-products generated from disinfection are as follows.

Generation of active substance (sterilizer)

Electrolysis of water with chloride ions in water causes the following reactions at the anode:

[Reaction Scheme 1]

_{^{2Cl - → Cl 2 + 2e -}} Eo = 1.359V at 25 ℃

[Reaction Scheme 2]

2H ₂ O → O ₂ + 4H ⁺ + 4e ^- Eo = 1.229V at 25 ℃

The electrode used for brine electrolysis suppresses the oxygen generation reaction (Scheme 2) and applies a catalyst that promotes the chlorine evolution reaction (Scheme 1). The cations Na ⁺ present in the brine and H ⁺ ions present in the water move to the cathode and the following reaction occurs.

Scheme 3

^{Na + + e - → Na Eo} = -2.71 V

[Reaction Scheme 4]

_{^{2H + + 2e - → H 2}} Eo = 0.0 v

Scheme 5

^{_{2H 2 O + 2e - → H}} 2 + 2OH - Eo = -0.828

Chlorine (Cl ₂ ) generated by Scheme 1 is a very water soluble chemical (0.64 ml / ml-H ₂ O). Dissolved chlorine in the water is Hypochlorous Acid (HClO), and digested with (hypochlorous acid) (Scheme 6), Hypochlorous Acid (HClO) is Hypochlorite ions hydrolysis ^- is a (hypochlorite ion) (Scheme 7) (ClO). Hypochlorite ions (ClO ⁻ ) also react with Na ⁺ ions in brine to form sodium hypochlorite (Scheme 8).

[Reaction Scheme 6]

_{Cl 2 (g) + H 2} O (l) → HOCl (aq) + H + (aq) + 2Cl - (aq)

[Reaction Scheme 7]

^{HOCl (aq) → H + (} aq) + ClO - (aq)

[Reaction Scheme 8]

^{Na + (aq) + ClO -} (aq) → NaClO (aq)

Hypochlorous Aacid (HClO) and Hypochlorite ion (ClO ^-) and the mixture is referred to as the FAC (free active chlorine).

The type of active substance present in the brine is determined by the pH. Natural water or to the artificial brine pH to about 8, present in the form of chlorine Hypochlorous Acid (HClO) or Hypochlorite ions (ClO ^-) is a.

Inorganic nitrogen and organic nitrogen exist in the water. Hypochlorous Acid (HClO) reacts with nitrogen compounds (eg, amines R-NH ₂ or ammonium NH ₄ ) to produce N-chloro compounds called halogenated amines. All halogenamines and FACs are measured in Total Available Oxidant or Total Residual Oxidant (TRO).

Generation of Disinfection Byproducts

Seawater or brine electrolysis systems produce disinfection by-products (DBPs). It is produced by the chemical reaction of organics with chlorine.

The main by-products produced during chlorine disinfection are THMs and Haloacetic acids (HAAs), as shown in Table 1, and are known to be produced by the following mechanisms.

(1) Trihalomethanes (THM)

Scheme 9

RCOCH ₃ + 3HOX → CHX ₃ + RCOOH + 2H ₂ O (X = Br or Cl)

(2) Halogenated acetic acids (HAAs)

[Reaction Scheme 10]

^{RCHO + HOX → RCOOH + H +} + X -

[Reaction Scheme 11]

RCOOH + HOX → RXCOOH + H ₂ O

[Reaction Scheme 12]

RXCOOH + HOX → RX ₂ COOH + H ₂ O

[Reaction Scheme 13]

RX ₂ COOH + HOX → RX ₃ COOH + H ₂ O

Table 1 Examples of Disinfection Byproducts

In the case of using the chlorine disinfectant produced using the electrochemical principle as described above, the chlorine disinfectant acts as a very strong sterilization function to prevent organisms from adhering to the heat exchanger, but when the concentration of the disinfectant is increased, the disinfection by-products and live fish There is a problem that can kill even fish in the tank and adversely affect the human body, so precise design is required.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by circulating the fungicide generated by the electrolysis of the brine to the heat exchanger to prevent the adhesion of organisms to the heat exchanger and remove the slime formed in the heat exchanger It is an object of the present invention to provide a slime removal device for a biological attachment prevention for heat exchangers.

Biological anti-adhesion combined slime removal device of the heat exchanger of the present invention for achieving the above object is an electrolysis cell having a positive electrode and a negative electrode so as to generate a disinfectant by electrolyzing seawater (salt water) which is a supply water, and DC power supply means for supplying DC power between the anode and the cathode of the electrolysis cell, and flow control means for flowing and controlling the supply water or sterilization water containing the sterilant generated in the electrolysis cell through a heat exchanger It is characterized by including.

In addition, the biological anti-adhesion combined slime removal device of the heat exchanger of the present invention for achieving the above object, the electrolysis cell having a positive electrode and a negative electrode so as to generate a sterilizing agent by electrolyzing salt water, DC power supply means for supplying DC power between the positive electrode and the negative electrode, salt water storage means for storing the brine for supplying to the electrolysis cell, and salt water in the salt water storage means or the sterilizer generated in the electrolysis cell It characterized in that it comprises a flow control means for flowing and controlling the sterilizing water contained in the heat exchanger.

According to the present invention, the flow control means further comprises neutralizing means for reacting the sterilizing water flowing through the heat exchanger with a neutralizing agent to remove the sterilizing agent in the sterilizing water and then discharging it to the outside.

In addition, according to the present invention, the flow control means is characterized in that it further has a branch line that does not pass through the electrolysis cell, and a valve installed in the branch line.

In addition, according to the present invention, the DC power supply means is a DC power supply between the positive electrode and the negative electrode of the electrolysis cell generated in the electrolysis cell to maintain the concentration of the sterilant 0.1 to 50 ppm flowing to the heat exchanger It is characterized by the supply.

In addition, according to the present invention, characterized in that it further comprises a dechlorination means for maintaining the concentration of the disinfectant in the discharge water generated in the electrolysis cell and discharged to the outside through the heat exchanger and the neutralizing means to 0.1 ppm or less. .

In addition, according to this invention, it characterized in that it further comprises a concentration maintaining means for maintaining the concentration of the brine at 1,000 ~ 40,000 ppm.

The present invention prevents organisms from adhering to the heat exchanger by circulating the sterilizer generated by electrolysis of the brine to the heat exchanger, and removes the slime formed in the heat exchanger, so that the heat exchanger can be managed cleanly so that the water can be smoothly stored in the water tank for a long time. It can be supplied, and there is an advantage that can save the cost spent on maintenance of the heat exchanger.

1 is a conceptual diagram illustrating a method of supplying water to an existing live fish tank,
2 is a flowchart illustrating a process of attaching a living organism to a heat exchanger,
Figure 3 is a schematic diagram of a biological attachment prevention slime removal device (in case of sea water) for a heat exchanger according to an embodiment of the present invention,
Figure 4 is a schematic diagram of a biological attachment prevention slime removal device (in case of fresh water) according to another embodiment of the present invention,
5 is a block diagram of a simulation apparatus according to the present invention,
6 is a photograph of a simulation apparatus according to the present invention.

In the following, with reference to the accompanying drawings, a preferred embodiment of the anti-adhesion combined slime removal device for a heat exchanger according to the present invention will be described in detail.

Figure 3 is a schematic diagram of a biofouling prevention slime removal device (in case of sea water) for a heat exchanger according to an embodiment of the present invention. As shown in FIG. 3, the bio-adhesion prevention slime removal device for a heat exchanger according to this embodiment includes an electrolysis cell 310 having a positive electrode and a negative electrode so as to generate a disinfectant by electrolyzing seawater (salt), which is a supply water. ), A DC power supply means 320 for supplying DC power between the positive electrode and the negative electrode of the electrolysis cell 310, and the sterilizing water containing TRO generated from the supply water or the electrolysis cell 310 is a heat exchanger. The flow control means 330 for flowing and controlling through the 120 and the sterilizing water flowing through the heat exchanger 120 by the flow control means 330 reacts with a neutralizing agent to remove TRO in the sterilizing water and then to the outside. The neutralizing means 340 is discharged.

Here, the electrolysis cell 310 performs a heat transfer between the two fluids of the high temperature liquid and the low temperature liquid, so that the water of the proper water temperature is supplied to the water storage tank 110 storing the live fish at the front end of the heat exchanger 120. Is installed. That is, the electrolysis cell 310 is installed in the main line constituting the flow control means 330, it is installed to be located in front of the heat exchanger (120).

Therefore, in the apparatus of this embodiment, when the DC power is supplied from the DC power supply unit 320 to the electrolysis cell 310, the reaction between the reaction schemes 1 to 8 occurs while the seawater passes. The TRO generated by the electrolysis in the electrolysis cell 310 is a germicide, and prevents organisms contained in the seawater supplied to the heat exchanger 120 from being attached to the heat exchanger 120 as well as being present in the heat exchanger. The slime is removed.

As described above, sterilized water containing TRO, which prevents biofouling and removes slime, is discharged to the outside through a neutralization process. The removal of NaOCl can be neutralized using a catalyst or chemicals. However, in this embodiment, the sterilized water containing TRO is reacted with the neutralizing agent in the neutralizing means 340 to remove the TRO and to discharge the TRO. Generally applicable neutralizing agents include sulfur dioxide (SO ₂ ), sodium bisulfite (NaHSO ₃ ), sodium sulfite (Na ₂ SO ₃ ), sodium thiosulfate (Na ₂ S ₂ O ₃₎ ). At this time, the reaction formula of the main compound and the effective chlorine is as follows.

[Reaction Scheme 14]

Na ₂ S ₂ O ₃ + Cl ₂ + H ₂ O → Na ₂ S0 ₄ + S + 2HCl

Hereinafter, a method of operating the biofouling prevention slime removing device for the heat exchanger according to this embodiment will be described.

Seawater supply mode

If no slime is formed, the seawater is supplied to the reservoir 110 through all the lines l ₁ → l ₂ → l ₃ → l ₄ → l ₅ → l ₁₀ , whereby the electrolysis cell 310 in the l ₄ line is provided. ) Operates in a mode that does not supply electricity. In FIG. 3, reference numeral 331 denotes a pump installed in the main line and constituting the flow control means 330, and reference numeral 332 denotes a branch line branched from the main line in order to repair and maintain the electrolysis cell 310. The valve is provided and constitutes the flow control means 330. Even when no slime is formed, the supply of seawater to the electrolysis cell 310 is to remove scales (accumulations such as calcium and magnesium) attached to the electrode during the electrolysis process.

Slime removal mode

To remove the slime, the path is blocked using the valve V1 and the valve V6 constituting the flow control means 330, and the sea water is circulated along the line l ₃ → l ₄ → l ₅ → l ₆ → l ₇ . At this time, the electrolysis cell 310 in line ₄ is supplied with direct current power through the direct current power supply means 320 to electrolyze seawater. At this time, the concentration of the disinfectant TRO operating in the circulation line l ₃ → l ₄ → l ₅ → l ₆ → l ₇ is suitably about 0.1 to 50 ppm. Here, the concentration lower than 0.1 ppm TRO is a concentration at which the microorganism to be sterilized does not die, and more than 50 ppm TRO is supplied with more chlorine than necessary to waste electric energy. That is, in this embodiment, the electrolytic cell 310 is supplied from the DC power supply unit 320 to a DC power source having a concentration of 0.1 to 50 ppm of the sterilant TRO generated in the electrolysis cell 310 and flowing to the heat exchanger 120. It may be controlled so as to be supplied between the positive electrode and the negative electrode.

Effluent Mode

When the removal of the slime is completed, the sea water is supplied to the neutralization means 340 along the lines l ₁ → l ₂ → l ₃ → l ₄ → l ₅ → l ₆ → l ₈ . Then, the neutralization means (340) reacts the seawater containing TRO with the neutralizing agent to remove the TRO, and then discharges it through the l ₉ line. The concentration of TRO emitted through this neutralization process should be 0.1 ppm or less, so as not to affect the ecosystem. That is, this embodiment is a dechlorination means (not shown) for maintaining the concentration of the disinfectant TRO in the discharge water generated in the electrolysis cell 310 and discharged to the outside through the heat exchanger 120 and the neutralizing means 340 (0.1 ppm or less). It is configured to have more).

Figure 4 is a schematic diagram of a biological attachment prevention slime removal device (in case of fresh water) for a heat exchanger according to another embodiment of the present invention. As shown in FIG. 4, the biodegradation combined slime removing device for a heat exchanger according to this embodiment includes an electrolysis cell 410 having a positive electrode and a negative electrode so as to generate a disinfectant by electrolyzing salt water, and an electrolysis cell. DC power supply means 420 for supplying DC power between the anode and the cathode of 410, salt water storage means 430 for storing the brine for supplying the electrolysis cell 410, and salt water storage means 430 Flow control means 440 for flowing and controlling the sterile water containing TRO generated in the brine or electrolysis cell 410 through the heat exchanger 120, and the flow control means 440 The sterilizing water flowing through 120 is reacted with a neutralizing agent to remove TRO in the sterilizing water and to discharge the neutralizing means 450 to the outside.

Here, the electrolysis cell 410 is a front of the heat exchanger 120 to perform a heat transfer between the two fluids of the hot liquid and the low temperature liquid to supply the water of the appropriate water temperature to the reservoir 110 for storing the live fish. Is installed. That is, the electrolysis cell 410 is installed in the main line constituting the flow control means 440, it is installed to be located in front of the heat exchanger (120).

Therefore, in the apparatus of this embodiment, when the direct current power is supplied from the direct current power supply means 420 to the electrolysis cell 410, sodium hypochlorite (NaOCl) is generated by the reaction formula 1 as in seawater, As a result, not only the organisms included in the fresh water supplied to the heat exchanger 120 are prevented from being attached to the heat exchanger 120, but also the slime present in the heat exchanger 120 is removed.

As described above, the effluent containing TRO, which prevents biofouling and removes slime, is discharged to the outside through the same neutralization process as seawater. The concentration of TRO emitted through this neutralization process should be 0.1 ppm or less, so as not to affect the ecosystem. That is, this embodiment is a dechlorination means (not shown) for maintaining the concentration of the disinfectant TRO in the discharge water generated in the electrolysis cell 410 and discharged to the outside through the heat exchanger 120 and the neutralizing means 450 (0.1 ppm or less). It is configured to have more).

Hereinafter, a method of operating the biofouling prevention slime removing device for the heat exchanger according to this embodiment will be described.

Freshwater Supply Mode

In the case where no slime is formed in the heat exchanger, fresh water is supplied to the reservoir 110 via the line l ₁ → l ₃ → l ₄ → l ₅ → l ₁₁ , where the electrolysis cell 410 in the l ₄ line is electrically It operates in a mode that does not supply. In FIG. 4, reference numeral 441 denotes a pump which is installed on the main line and constitutes the flow control means 440, and reference numeral 442 denotes a branch line branched from the main line to repair and maintain the electrolysis cell 410. The valve is provided and constitutes the flow control means 440. Even when no slime is formed, the supply of fresh water through the electrolysis cell 410 is to remove scales (accumulations such as calcium and magnesium) attached to the electrode during the electrolysis process.

Slime removal mode

To remove the slime, the valve V1 and the valve V6 constituting the flow control means 440 are blocked to block the fresh water supply path, and the brine from the brine storage means 430 is l ₃ → l ₄ → l ₆ → l ₇ → Circulate ₈ lines. At this time, the electrolysis cell 410 in the line ₄ is supplied with DC power through the DC power supply means 420. Here, the concentration of the sterilizer TRO operating in the line is suitable about 0.1 ~ 50 ppm. A concentration lower than 0.1 ppm is a concentration at which microorganisms to be sterilized are not killed, and more than 50 ppm is supplied with more chlorine than necessary to waste electrical energy. That is, in this embodiment, the electrolysis cell 410 is supplied from the DC power supply means 420 to a DC power supply generated in the electrolysis cell 410 and flowing into the heat exchanger 120 to maintain a sterilant TRO concentration of 0.1 to 50 ppm. It may be controlled so as to be supplied between the positive electrode and the negative electrode.

On the other hand, since the energy consumption is rapidly increased when electrolyzing fresh water, it is preferable to maintain NaCl concentration in the line of about 1,000 ~ 40,000 ppm in order to effectively generate TRO. That is, this embodiment may be configured to further have a concentration maintaining means (not shown) for maintaining the concentration of the brine at 1,000 to 40,000 ppm.

Effluent Mode

After the slime is removed, the brine is discharged through the lines l ₁ → l ₂ → l ₄ → l ₅ → l ₆ → l ₇ → l ₉ → l ₁₀ . On the other hand, since the brine of the l ₉ line contains TRO, it is mixed in the neutralizing agent and the neutralizing means 450 to remove the TRO to 0.1 ppm and then discharged to the outside.

[Experimental Example]

1. Device and operating conditions

Simulated experimental apparatus for the evaluation of the invention has a treatment capacity of the sea water 2m ³ / hr, was configured as shown in FIG. 5 is a block diagram of a simulation apparatus according to the present invention, Figure 6 is a photograph of the simulation apparatus according to the present invention. The design criteria of this simulation apparatus are shown in Table 2, and the specifications of the electrolysis cell are shown in Table 3, respectively. The concentration of oxidant produced in the electrolyzer was controlled by the current value supplied from the DC rectifier.

[Table 2] Design data

[Table 3] Electrolysis Cell Specifications

2. Driving and Evaluation

end. Sterilization Stage

The microbial colonies were adjusted to the microbial water tank (T1) and moved to the sampling tank (T3) of the main line through the P1 pump. At this time, seawater was supplied to the electrolyzer through the P2 pump as a branch line branched from the main line, and current was applied to the electrolyzer to adjust the concentration of the main line. The seawater conditions used in the experiment are shown in Table 4 below, and Table 5 shows the types of microorganisms in the T1 microbial water tank (T1).

[Table 4] Conditions of Seawater

[Table 5] Microorganism types in the microbial water tank (T1) used in the experiment

I. Discharge stage

The oxidizing agent present in the seawater was neutralized while moving from the sampling tank T3 to the sampling tank T5 through the P3 pump.

All. sampling

Sampling was performed at six locations S1 to S6. Samples were used for chemical and performance analysis. S2 is a microorganism analysis in a control tank (T2) used as a control for performance evaluation, S3 is a concentration analysis of TRO produced in the electrolytic cell, S4 is a TRO concentration analysis after mixing in the main line, S5, S6 is a performance evaluation and Sampling location for by-product analysis.

3. Results

end. Microbial removal

Table 6 shows the microorganisms measured in the sampling tank (T3) after sterilizing the microorganisms in the microbial water tank (T1) in the seawater conditions PSU 33 and PSU 20 standards with a concentration of 20 ppm of TRO produced by electrolysis. It is. It was found that microbial removal was able to kill completely at 20 ppm of TRO.

[Table 6] Microbial killing evaluation

I. Effluent Analysis

Table 7 below shows the results of chemical analysis of by-product DBPs obtained from the sampling tank (T5) after seawater was neutralized. For reference, the regulation values of major countries of the world are compared with the experimental results. As a result, it was confirmed that by-products below the drinking water level were produced.

Table 7 Comparison of Regulatory Concentrations in the World Health Organization and the US

All. Acute Toxicity Assessment

After neutralization, seawater was collected from sampling tank (T5) to evaluate the ecological impacts of the discharged water. Table 8 shows the microorganisms used for the toxicity assessment and the evaluation methods. The treated water is evaluated by diluting the medium 0.0, 6.25, 12.5, 25.0, 50.0 and 100%, the evaluation time is up to 4 days.

[Table 8] Microorganisms and organisms used for evaluation

Acute toxicity results are shown in Table 9 and Table 10. As shown in the table, it was found that it is harmless even if it is neutralized and discharged to external system.

Table 9 Acute Toxicity Assessment in 33 PSUs

Table 10 Acute Toxicity Assessment at 20 PSU

4. Conclusion

(1) As a result of evaluation with simulated microorganisms instead of slime of heat exchanger, it was found that design of electrolysis cell for slime removal of heat exchanger and design without affecting the ecosystem of effluent were possible.

(2) It was found that 20 ppm of TRO concentration was a bactericide concentration based on 1 hour, and high concentration treatment of 20 ppm or more for short time treatment and low concentration treatment for longer than 1 hour treatment were possible.

(3) In the neutralization process, if the concentration of TRO was maintained at 0.1 ppm, it could be seen that there was no effect on the suppression of by-products and the marine ecosystem of the effluent.

In the above description, the technical idea of the anti-adhesion combined slime removing device for a heat exchanger according to the present invention has been described together with the accompanying drawings, but this is by way of example and not by way of limitation. In addition, it is a matter of course that various modifications and variations are possible without departing from the scope of the technical idea of the present invention by anyone having ordinary skill in the art.

110: reservoir 120: heat exchanger
310: electrolysis cell 320: DC power supply means
330 flow control means 340 neutralization means

Claims (8)

An electrolysis cell having a positive electrode and a negative electrode so as to generate a disinfectant by electrolyzing seawater (salt water), which is a supply water,
DC power supply means for supplying DC power between the anode and the cathode of the electrolysis cell, and
And a flow control means for flowing and controlling the sterilizing water containing the sterilizing agent generated in the supply water or the electrolysis cell through a heat exchanger. An electrolysis cell having a positive electrode and a negative electrode so as to generate a bactericide by electrolyzing the brine,
DC power supply means for supplying DC power between the anode and the cathode of the electrolysis cell;
Brine storage means for storing the brine for supplying the electrolysis cell, and
Biological attachment prevention slime removal apparatus for heat exchanger comprising a flow control means for flowing and controlling the sterilized water containing the sterilizing agent generated in the brine or the electrolysis cell in the brine storage means through a heat exchanger. The method according to claim 1 or 2,
The biological control device slime removal for heat exchanger further comprises a neutralizing means for reacting the sterilizing water flowing through the heat exchanger by the flow control means with a neutralizing agent to remove the sterilizing agent in the sterilizing water and then discharge it to the outside. Device. The method according to claim 1 or 2,
The flow control means further includes a branch line that does not pass through the electrolysis cell, and a slime removal device for a biological attachment prevention heat exchanger, characterized in that it further comprises a valve installed in the branch line. The method according to claim 1 or 2,
The DC power supply means is a heat exchange, characterized in that for supplying a DC power between the positive electrode and the negative electrode of the electrolysis cell generated in the electrolysis cell and the concentration of the sterilant flowing in the heat exchanger is 0.1 ~ 50 ppm Anti-adherent combined slime removal device. The method according to claim 3,
Biodegradation combined slimes for heat exchangers further comprises a dechlorination means for maintaining the concentration of the disinfectant in the discharged water generated in the electrolysis cell and discharged to the outside through the heat exchanger and the neutralizing means to 0.1 ppm or less. Removal device. The method of claim 6,
The DC power supply means is a heat exchange, characterized in that for supplying a DC power between the positive electrode and the negative electrode of the electrolysis cell generated in the electrolysis cell and the concentration of the sterilant flowing in the heat exchanger is 0.1 ~ 50 ppm Anti-adherent combined slime removal device. The method according to claim 1 or 2,
Biological attachment prevention slime removal device for heat exchanger further comprises a concentration maintaining means for maintaining the concentration of the brine to 1,000 ~ 40,000 ppm.

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