KR20030074098A - A wastewater treatment apparatus - Google Patents

Abstract

PURPOSE: Provided is a wastewater treatment apparatus for treating wastewater by low temperature vaporization using dry air, and increasing energy efficiency. CONSTITUTION: The apparatus comprises a wastewater storage tank for storing and supplying wastewater; an electrolysis and vaporization unit(3) including an electrolyzer(7) with a main electrode and a balance electrode, a condenser(9) installed on the electrolyzer(7), a transformer and a controller; a wastewater inlet pipe(15a) connected to a pump for transporting wastewater from the wastewater storage tank to the electrolyzer(7); a wastewater discharge pipe(15b) for discharging the concentrated wastewater from the electrolyzer(7) to the wastewater storage tank; a circulating inlet pipe(17a) connected to a pump for transporting the wastewater from the wastewater storage tank to the condenser(9); and a circulating discharge pipe(17b) for discharging the wastewater heated by the condenser(9) to the wastewater storage tank; a condensate water discharge pipe for discharging condensate water condensed in the electrolysis and vaporization unit(3); and a condensate water storage tank.

Description

Wastewater Evaporation Treatment System {A WASTEWATER TREATMENT APPARATUS}

The present invention relates to a wastewater evaporation treatment apparatus, and more particularly, to treat wastewater using an evaporator for inducing evaporation of wastewater and a condenser for condensing evaporated water, and the remaining wastewater uses an electrolysis and filtration method. It relates to a single process wastewater treatment apparatus for treatment by.

Generally, wastewater treatment can be divided into physical, chemical, and biological methods. However, among them, as a method of treating high concentration and hardly degradable wastewater, physical methods are frequently used. Evaporation is one of these physical methods, which separates nonvolatile contaminants and water by evaporating wastewater.

In the evaporation method as described above, a method of directly evaporating wastewater by evaporation, a method of vacuuming the wastewater to induce low temperature evaporation of the wastewater, and evaporating the wastewater using high-temperature steam generated by waste heat generated during other processes. It is a method to make it. This evaporation method can maintain a relatively stable treated water quality without being affected by the water quality fluctuations of raw water, can easily remove non-volatile hardly decomposable substances, and is simpler and easier to manage than chemical or biological methods.

However, the conventional evaporation apparatus according to the evaporation method has the following disadvantages. Since the flame direct heating device must continue to use fuel such as natural gas or oil, the process maintenance cost is high, and the vacuum decompression device has a constant treatment result according to the condition of the inflowed wastewater, and the vacuum must be continuously maintained. There is difficulty in managing this. Evaporator using waste heat needs to be connected with other processes that generate heat, so the installation conditions are difficult and the scale of construction is likely to increase.

In addition, the existing evaporators, in particular, have a common limitation that a single system evaporator cannot be completely treated with the incoming wastewater and a separate process must be added to treat the concentrated wastewater remaining after evaporation.

Accordingly, an object of the present invention is to provide a wastewater evaporation treatment apparatus which can improve energy efficiency by inducing low temperature evaporation by dry air by solving the above problems.

It is also an object of the present invention to provide a wastewater evaporation treatment apparatus equipped with an electrolysis and evaporation unit to enable complete purification of high concentrations of hardly degradable wastewater by a single process.

1 is a schematic view showing a wastewater evaporation treatment apparatus according to a first embodiment of the present invention,

2a to 2e show an embodiment of the electrolysis and evaporation unit of FIG.

3 is a schematic view showing a wastewater evaporation treatment apparatus according to a second embodiment of the present invention;

4 is a cross-sectional view of an embodiment of the evaporator of FIG. 3.

<Description of the symbols for the main parts of the drawings>

1,51: waste water storage tank 3,53: electrolysis and evaporation unit

5,55: condensate tank 7,57: electrolysis tank

9,58,59,60: condenser 52: evaporator

54 Steam Compressor 56 Disperser

62: separator separator 67: circulation pipe

A first embodiment of the wastewater evaporation treatment apparatus of the present invention for achieving the above object is a wastewater storage tank for collecting and supplying wastewater; An electrolysis and evaporation unit having an electrolysis tank composed of a main electrode and a balance electrode through which a current flows, and a condenser on the top thereof, and a transformer 13 for alternating current switching and a controller for control; A wastewater inlet pipe having a pump for supplying wastewater from the wastewater storage tank to the electrolysis water tank and a wastewater discharge pipe for discharging concentrated wastewater from the electrolysis water tank to the wastewater storage tank; A circulation inlet pipe having a pump and connected to the condenser for introducing wastewater from the wastewater storage tank to the condenser, and a circulating discharge pipe for discharging the heated wastewater to the wastewater storage tank while passing through the condenser; A condensate discharge tube for discharging condensed water condensed in the electrolysis and evaporation unit; Condensate storage tank for collecting the condensate discharged through the condensate discharge pipe.

The wastewater discharge pipe is preferably further provided with a membrane permeable filter for filtering the concentrated wastewater to be sent to the wastewater storage tank.

A second embodiment of the wastewater evaporation treatment apparatus of the present invention includes: a wastewater storage tank for collecting and supplying wastewater; A wastewater inlet pipe for supplying wastewater from the wastewater storage tank; Waste water inflow pipe is connected to one end of the lower part, and waste water is introduced, and dry air supply pipe is connected to the other end of the lower part, and dry air is introduced. At the upper end, wet steam formed by evaporation of the waste water is discharged. An evaporator connected to the wet steam discharge pipe; A steam compressor installed in the wet steam discharge pipe to increase the temperature of wet steam by adiabatic compression; A first condenser connected to the wet steam discharge pipe to condense the discharged wet steam by heat exchange; A first condensate discharge pipe configured to discharge the condensed water condensed by the first condenser; A water separator (62) disposed in the first condensate discharge pipe (55a) and connected to the dry air supply pipe (62a) to separate dry air and supply the dry air to the evaporator (52) through the dry air supply pipe (62a); Condensate storage tank 55 is the condensate discharged to the first condensate discharge pipe 55a is collected.

The evaporator is provided with a circulating tube for discharging the wastewater by the transfer pump and supplying the discharged wastewater back to the evaporator, and the circulating tube may be arranged to pass through the first condenser. Therefore, the waste water circulated through the circulation pipe is heated by heat exchange with the high temperature wet steam supplied to the first condenser through the wet steam discharge pipe, and is supplied to the upper portion of the evaporator with the high temperature waste water.

The upper part of the evaporator may be provided with a rotating disperser having a rotating motor, and a circulation pipe may be connected to the disperser, and the hot waste water heated while passing through the circulation pipe may be rotated and supplied through the disperser. . In addition, a filter medium may be filled in the central portion of the evaporator.

It may also be configured to further include the electrolysis and evaporation unit described in the first embodiment, wherein the circulation tube passes through the first condenser and then the condenser (second condenser) of the electrolysis and evaporation unit. Is disposed so as to pass through, the one end is connected to the bottom of the evaporator, the highly concentrated wastewater transfer pipe for transporting the highly concentrated hardly degradable wastewater at the bottom of the evaporator to the electrolysis tank and the concentrated wastewater not decomposed in the electrolysis tank A wastewater return pipe connected to the wastewater inlet pipe is connected, and the electrolysis and evaporation unit includes a second condensate discharge pipe for discharging the condensed water condensed in the second condenser into the condensate storage tank. It is characterized by.

The wastewater return pipe may be further provided with a membrane permeable filter for filtering the concentrated wastewater to be sent to the wastewater inlet pipe.

The first condensate discharge pipe is provided with a third condenser to condense steam that has not been condensed in the first condenser. Thereafter, while passing through the separator, condensate is discharged to the condensate storage tank through the first condensate discharge pipe, and only dry air is discharged to the dry air supply pipe.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a schematic diagram of a wastewater evaporation treatment apparatus according to a first embodiment of the present invention. As shown, the wastewater evaporation treatment apparatus according to the present embodiment includes a wastewater storage tank 1 for collecting and supplying wastewater, an electrolysis and evaporation unit 3, and a condensate storage tank 5 for collecting condensate. .

One embodiment of the electrolysis and evaporation unit 3 is shown in detail in FIGS. 2A-2E. 2A is a perspective view thereof, and FIG. 2B is a plan view thereof. As shown, the electrolysis and evaporation unit 3 consists of an upper condenser 9 and a lower electrolysis tank 7.

As the condenser may be a conventional condenser, an embodiment of the condenser 9 is illustrated in FIG. 2C. 2D and 2E are a plan view and a side view of the electrolysis tank 7, respectively. The interior of the electrolysis bath 7 is composed of a main electrode 7a and a balance electrode 7b through which current flows, so that decomposition occurs by electrochemical action of the electrode while the wastewater flows in the direction indicated by the dotted arrows in FIG. 2D. . The conventional general electrolytic wastewater treatment system is supplied with a direct current. However, the electrolysis and evaporation unit 3 of the present invention is connected to the transformer for alternating current (13, see Fig. 1) is supplied to supply an alternating current, since the heat generated during the electrolysis process by the alternating current is decomposed wastewater Will evaporate. The evaporated wastewater is condensed in the condenser 9 at the top. The electrolysis bath 7 may also be equipped with a controller 11 for control.

As shown in FIG. 1, the wastewater is supplied from the wastewater storage tank 1 to the electrolysis water tank 7 of the electrolysis and evaporation unit 3 through the wastewater inflow pipe 15a, wherein the wastewater inflow pipe ( 15a) is provided with a metering pump 15c to induce the supply of wastewater. The wastewater supplied and treated to the electrolysis water tank 7 is discharged to the wastewater storage tank 1 through the wastewater discharge pipe 15b. At this time, since the concentrated wastewater remaining without electrolysis and evaporation is discharged to the wastewater discharge pipe 15b, it is preferable to install the membrane permeable membrane filter 16 in the wastewater discharge pipe 15b to filter and discharge the wastewater.

In addition, wastewater is introduced into the condenser 9 of the electrolysis and evaporation unit 3 from the wastewater storage tank 1 through a circulation inlet pipe 17a, and the wastewater is evaporated from the electrolysis water tank 7. The heat is taken from the wet steam and heated and then discharged through the circulation discharge pipe 17b. The circulation inlet pipe 17a is provided with a circulation pump 17c to induce supply of wastewater to the condenser 9.

The condensed water condensed in the condenser 9 after being evaporated in the electrolysis water tank 7 of the electrolysis and evaporation unit 3 is discharged to the condensed water storage tank 5 through the condensed water discharge pipe 19.

Looking at the action of the wastewater evaporation treatment device configured as described above are as follows. First, the wastewater of the wastewater storage tank 1 is supplied to the electrolysis and evaporation unit 3 through the wastewater inlet pipe 15a and the circulation inlet pipe 17a. At this time, the wastewater introduced through the circulation inlet pipe 17a is supplied to the condenser 9, heated, and then recovered again to the wastewater storage tank 1. Therefore, the wastewater of the wastewater storage tank 1 rises to a certain temperature through the circulation pipes 17a and 17b passing through the condenser 9.

The wastewater introduced through the wastewater inlet pipe 15a is supplied to the electrolysis tank 7 of the electrolysis and evaporation unit 3 and electrically decomposed while passing through the electrolysis tank 7. At this time, an alternating current flows through the electrolysis water tank 7 to generate heat, and the decomposed waste water is heated to form wet steam and evaporate. The wet steam loses heat in the wastewater passing through the circulation pipes 17a and 17b in the condenser 9 and is condensed and collected in the condensate storage tank 5 through the condensate discharge pipe 19. The concentrated wastewater remaining without being decomposed and evaporated in the electrolysis water tank 7 is filtered by the filter 16 and then recovered to the wastewater storage tank 1 again.

Therefore, through the wastewater evaporation treatment device as described above, not only the treatment efficiency is improved by a single process of electrolysis and evaporation, but also the energy efficiency is improved by using the heat discharged by the wet steam condensation to heat the wastewater. You can.

3 is a schematic view showing a wastewater evaporation treatment apparatus according to a second embodiment of the present invention. As shown, the wastewater evaporation treatment apparatus according to the present embodiment includes a wastewater storage tank 51 for collecting and supplying wastewater, an evaporator 52, and a condensate storage tank 55 for collecting condensate.

An internal cross section of the evaporator 52 is shown in FIG. 4. As shown in the evaporator 52, the wastewater inlet pipe 51a is connected to one end of the lower portion so that the wastewater is introduced from the wastewater storage tank 51 (see FIG. 3), and the other part of the lower portion is a dry air supply pipe 62a. ) Is connected to dry air. Accordingly, the lower part of the evaporator 52 meets the dry air and the wastewater to cause low temperature evaporation. A spray nozzle 62b may be added to a supply end of the dry air supply pipe 62a to diffusely supply dry air, thereby improving low temperature evaporation efficiency.

In addition, the upper end of the evaporator 52 is connected to the wet steam discharge pipe 52a for discharging the wet steam formed by evaporation of the waste water by the dry air. The wet steam discharge pipe 52a is provided with a steam compressor 54 that adiabaticly compresses the wet steam to increase the temperature, and is followed by a first condenser 58 for heat-condensing the wet steam.

A first condensate discharge pipe 55a is connected to the first condenser 58 to discharge the condensate to the condensate storage tank 55. In addition, a water separator (62) is disposed in the first condensate discharge pipe (55a), and the water separator (62) is connected to one end of the dry air supply pipe (62a). The condensed water discharged from the first condenser (58) passes through the water separator (62), separates the dry air, and supplies the condensed water to the condensate storage tank (55) through the dry air supply pipe (62a). Will be discharged.

Therefore, the wastewater of the wastewater storage tank 51 is supplied to the evaporator 52 through the wastewater inlet pipe 51a, and the wastewater is discharged to the wet steam discharge pipe 52a by low temperature evaporation by dry air, and the wet steam discharge pipe 52a. After the temperature is increased by adiabatic compression by the steam compressor 54 installed in the), it is transferred to the first condenser 58. The purified water condensed in the first condenser 58 is discharged through the first condensate discharge pipe 55a, wherein the air dried while passing through the water separator 62 installed in the first condensate discharge pipe 55a is separated and dried. It is supplied to the evaporator through the air supply pipe 62a, and only the condensate is discharged to the condensate storage tank 55.

The evaporator 52 may also be equipped with a circulation tube 67. The circulation pipe 67 is provided with a pump 67a, and the wastewater flows out from the evaporator 52, and the discharged waste water is supplied to the evaporator 52 through the circulation pipe 67 again. At this time, the circulation pipe 67 continues through the first condenser 58, and by this structure, the wet steam discharge pipe 52a while the wastewater circulating through the circulation pipe 67 passes through the first condenser 58. Heat is exchanged with the high temperature wet steam supplied to the first condenser 58 through the heating. Therefore, hot wastewater is supplied to the upper portion of the evaporator 52.

The circulation of the wastewater through the circulation pipe 67 and the supply of the heated wastewater to the evaporator 52 during this circulation promote the evaporation of the wastewater by cold and dry air and the formation of wet steam, and the first condenser 58 In this heat exchange between the wet steam and the circulating waste water occurs, thereby improving the energy efficiency.

An upper part of the evaporator 52 may be provided with a disperser 56 which is connected to the rotary motor 56a and rotates. Then, the circulation pipe 67 for supplying the heated wastewater to the evaporator 52 is connected to the disperser 56, and thus, through the distributor 56, the heated wastewater rotates while passing through the circulation pipe 67. It is supplied while being rotated and dispersed, which promotes evaporation of the wastewater by widening the contact area between the hot wastewater and the low temperature dry air.

In addition, the filter medium 65 may be filled in the central portion of the evaporator 52. This filter medium 65 is for filtering the concentrated wastewater which cannot be evaporated and descends among the high temperature wastewater supplied to the upper part of the evaporator 52.

The wastewater evaporation treatment apparatus according to the present embodiment may also include the electrolysis and evaporation unit 53 described above in FIGS. 1 and 2A-2E. As described above, the structure has an electrolysis bath 57 composed of a main electrode and a balance electrode through which a current flows, and a condenser 59 (hereinafter referred to as a second condenser) at the top.

In this case, the circulation pipe 67 may be disposed to pass through the second condenser 59 after passing through the first condenser 58 as shown in FIG. 3. Therefore, the wastewater circulating in the circulation pipe 67 is heated by heat exchange with the wet steam discharged from the evaporator 52 in the first condenser 58, and the electrolysis and evaporation unit 53 in the second condenser 59. Heat exchanged with the wet steam evaporated in the electrolysis tank 57 of the. As a result, the temperature of the circulating wastewater can be further increased, thereby improving energy efficiency and further promoting evaporation in the evaporator 52.

The electrolysis tank 57 is connected to the lower end of the evaporator 52 through the highly concentrated wastewater conveyance pipe 57a and the wastewater return pipe 57b. That is, the highly concentrated hardly decomposable wastewater collected at the bottom of the evaporator 52 is transferred to the electrolysis tank 57 through the highly concentrated wastewater transfer pipe 57a, and the highly concentrated hardly decomposed wastewater is transferred from the electrolytic tank 57. Decomposes electrochemically. An electrode in the electrolysis bath 57 is supplied with an alternating current as described in the first embodiment, thus generating heat to evaporate the decomposed wastewater. The evaporated wet steam is condensed in the second condenser 59 and discharged to the condensate storage tank 55 through the second condensate discharge pipe 55b.

Then, the concentrated wastewater remaining without decomposition in the electrolysis water tank 57 is recovered to the evaporator 52 through the wastewater return pipe 57b. The wastewater return pipe (57b) may be further provided with a membrane permeable filter (66) so that the concentrated wastewater can be filtered and transferred to the evaporator (52).

A third condenser 60 may be further provided in the first condensate discharge pipe 55a for discharging the condensed water condensed by the first condenser 58. The third condenser 60 condenses the remaining water vapor which cannot be condensed by the first condenser 58 in the dry air. Then, the condensed water thus condensed while passing through the separator 62 is discharged to the condensate storage tank 55 through the first condensate discharge pipe 55a, and dry air is separated and the evaporator 52 through the dry air supply pipe 62a. Is supplied.

Looking at the action of the wastewater evaporation treatment device configured as described above are as follows. First, the wastewater of the wastewater storage tank 51 is supplied to the evaporator 52 through the wastewater inlet pipe 51a, is evaporated in the evaporator 52, formed as wet steam, and discharged into the wet steam discharge pipe 52a. The adiabatic compression is carried out while passing through the steam compressor 54, and the temperature is raised to flow into the first condenser 58. On the other hand, some of the wastewater introduced into the evaporator flows into the circulation pipe (67), and is heated by heat exchange with wet steam while passing through the first condenser (58) and the second condenser (59), and then the disperser (56) at the top of the evaporator is heated. Recovered to the evaporator 52 through. The hot waste water thus recovered meets the dry air and evaporates into wet steam as described above and flows back into the first condenser 58.

The wet steam introduced into the first condenser 58 is condensed and discharged through the first condensate discharge pipe 55a, and the steam not condensed in the first condenser 58 is recondensed in the third condenser. Thereafter, while passing through the water separator 62, the dry air is separated and supplied to the evaporator 52 through the dry air supply pipe 62a, and only the condensed water is discharged to the condensate storage tank 55.

On the other hand, the concentrated wastewater at the bottom of the evaporator 52 is supplied to the electrolysis tank 57 of the electrolysis and evaporation unit 53 through the highly concentrated wastewater transfer pipe 57a, and the electrolysis tank 57 is It is decomposed electrically during the process. At this time, an AC current flows through the electrolysis water tank 57, and the decomposed waste water is heated by this heat to form wet steam and evaporate. The wet steam loses heat in the wastewater passing through the circulation pipe 67 in the second condenser 59 and is condensed and collected in the condensate storage tank 55 through the second condensate discharge pipe 55b. The concentrated wastewater remaining without decomposition and evaporation in the electrolysis water tank 57 is filtered by the filter 66 and then returned to the evaporator 52.

The wastewater evaporation treatment apparatus configured as described above can not only completely treat the high concentration hardly degradable wastewater through a single circulation process, but also improve the energy efficiency by using the heat released by the wet steam condensation for heating the wastewater.

As described above, the wastewater evaporation treatment apparatus according to the present invention has an advantage of efficiently treating wastewater by a single process of circulation by evaporation by dry air and treatment of concentrated wastewater using an electrolysis and evaporation unit.

In addition, low-temperature evaporation is used to improve energy efficiency, maintain uniform quality of the treated water, and simplify maintenance and management.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the general knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with a variety of modifications are possible, of course, such modifications are within the scope of the claims.

Claims (9)

A wastewater storage tank 1 for collecting and supplying wastewater; It has an electrolysis bath (7) consisting of a main electrode (7a) and a balance electrode (7b) through which current flows, and a condenser (9) at the top, and a transformer (13) for alternating current and control. An electrolysis and evaporation unit 3 to which the controller 11 is connected; A wastewater inlet pipe 15a for supplying wastewater from the wastewater storage tank 1 to the electrolysis water tank 7 with a pump 15c and concentrated wastewater from the electrolysis water tank 7 to the wastewater storage tank 1 Waste water discharge pipe (15b) for discharging; The pump 17c is connected to the condenser 9 and the waste water heated while passing through the circulation inlet pipe 17a and the condenser 9 for introducing the wastewater from the wastewater storage tank 1 to the condenser 9. A circulation discharge pipe 17b discharged to the waste water storage tank 1; A condensate discharge pipe (19) for discharging the condensed water condensed in the electrolysis and evaporation unit (3); Wastewater evaporation treatment apparatus comprising a condensate storage tank (5) for collecting the condensate discharged through the condensate discharge pipe (19). The wastewater evaporation treatment apparatus according to claim 1, wherein the wastewater discharge pipe (15b) further includes a filter (16) for filtering concentrated wastewater and transporting the wastewater to the wastewater storage tank. A wastewater storage tank 51 for collecting and supplying wastewater; A wastewater inlet pipe 51a for supplying wastewater from the wastewater storage tank 51; Waste water inflow pipe (51a) is connected to one end of the lower flows in, waste water is introduced, the dry air supply pipe (62a) is connected to the other end of the lower flows into the dry air, the upper end of the waste water evaporated by the dry air An evaporator 52 to which a wet steam discharge pipe 52a through which the formed wet steam is discharged is connected; A steam compressor (54) installed in the wet steam discharge pipe (52a) to increase the temperature of wet steam by adiabatic compression; A first condenser 58 connected to the wet steam discharge pipe 52a to condense the discharged wet steam by heat exchange; A first condensate discharge pipe (55a) for discharging the condensed water condensed by the first condenser (58); A water separator (62) disposed in the first condensate discharge pipe (55a) and connected to the dry air supply pipe (62a) to separate dry air and supply the dry air to the evaporator (52) through the dry air supply pipe (62a); Wastewater evaporation treatment apparatus comprising a condensate storage tank 55 for collecting the condensate discharged to the first condensate discharge pipe (55a). According to claim 3, The evaporator 52 is provided with a circulating tube (67) for supplying wastewater discharged out of the waste water by the pump (67a) back to the evaporator (52), the circulating tube (67) The waste water circulated through the first condenser 58 and circulated through the circulation pipe 67 is heated by heat exchange with the high temperature wet steam supplied to the first condenser 58 through the wet steam discharge pipe 52a. Waste water evaporation treatment apparatus characterized in that the supply of high temperature wastewater to the evaporator. The disperser 56 which rotates with the rotating motor 56a is installed in the upper part of the said evaporator, and the circulation pipe 67 is connected to the disperser 56, and passes through the circulation pipe 67. Waste water evaporation treatment apparatus characterized in that the hot waste water heated while being supplied by rotating dispersion through the disperser (56). 6. The wastewater evaporation treatment apparatus according to claim 4 or 5, wherein a filter material (65) is filled in the central portion of the evaporator (52). 4. The transformer (63) according to claim 3, further comprising an electrolysis tank (57) consisting of a main electrode and a balance electrode through which current flows, and a second condenser (59) at the top, and a transformer (63) for alternating current and control. It is configured to further include an electrolysis and evaporation unit 53 to which the controller 61 is connected, The circulation tube 67 is arranged to pass through the second condenser 59 after passing through the first condenser 58, One end of the electrolysis tank 57 is connected to the lower end of the evaporator 52, and the highly concentrated wastewater transfer pipe 57a and the electrolysis tank for transferring the highly concentrated hardly decomposable wastewater at the bottom of the evaporator to the electrolysis tank 57. A wastewater return pipe 57b for returning the concentrated wastewater not decomposed at 57 to the evaporator 52 is connected, The electrolysis and evaporation unit 53 has a second condensate discharge pipe (55b) for discharging the condensed water condensed in the second condenser 59 to the condensate storage tank 55, the vapor evaporated in the electrolysis water tank (57) Wastewater evaporation treatment apparatus characterized in that it is provided. The wastewater evaporation treatment apparatus according to claim 5, wherein the wastewater return pipe (57b) is further provided with a filter (66) for filtering the concentrated wastewater and transporting it to the wastewater inlet pipe. According to claim 3, wherein the first condensate discharge pipe (55a) is provided with a third condenser (60) condensed steam not condensed in the first condenser 58, the condensate is extended while passing through the separator Discharged to the condensate storage tank 55 through the first condensate discharge pipe (55a), and only dry air is discharged to the dry air supply pipe (62a).