KR102056088B1 - Apparatus for Processing waste water concentration of wastewater reduction type with low temperature diffusion - Google Patents

Abstract

The present invention relates to a circulation low-temperature evaporative wastewater reduction type wastewater concentration treatment apparatus, capable of: purifying steam including chemicals and harmful materials generated from individual treatment tanks in a surface treatment process; at the same time, increasing the amount of reused wastewater by evaporating wastewater supplied to the inside of a vaporization tank and thus, generating the steam into saturated steam; reducing generation of the wastewater, condensing the steam, and reusing the same in each treatment tank for surface treatment; and reducing the supply of new treatment water and reducing the discharge of the wastewater. The circulation low-temperature evaporative wastewater reduction type wastewater concentration treatment apparatus comprises: a heat exchange unit heating through an outside heat source or waste heat of a heat treatment tank; a vaporization tank adsorbing chemicals and harmful materials inside steam by injecting the heated steam, and forming the steam into saturated steam; a condensation unit condensing the steam passing the vaporization tank in order to be formed into condensed water; a filter unit filtering the chemicals and harmful materials remaining inside the condensed water condensed in the condensation unit; a treatment tank receiving the input of the filtered condensed water and using the same in a surface treatment process for treating the surface of an object; a wastewater treatment unit purifying wastewater used in the treatment tank; a discharge unit filtering the wastewater treated in the wastewater treatment unit and discharging the same; and a storage unit storing the wastewater discharged through the discharge unit and injecting the same into the vaporization tank. Therefore, the wastewater concentration treatment apparatus can purify steam including chemicals and harmful materials generated from individual treatment tanks in a surface treatment process at the same time, can increase the amount of reused wastewater by evaporating wastewater supplied to the inside of a vaporization tank and thus, generating the steam into saturated steam, and can reduce condense the steam and reuse the same in each treatment tank for surface treatment.

Description

Apparatus for Processing waste water concentration of wastewater reduction type with low temperature diffusion

The present invention relates to a circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus, and more particularly, to purify steam containing chemicals and harmful substances generated in each treatment tank of the surface treatment process and simultaneously into the vaporization tank. By evaporating the supplied waste water to produce steam as saturated steam, it increases the reuse amount of the waste water, reduces the generation of waste water, and condenses the steam to be reused in each treatment tank of the surface treatment. The present invention relates to a circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus for reducing the discharge of wastewater.

In general, wastewater from industrial facilities, such as plating plants, is a problem because it contains a variety of heavy metals, apart from the high and low amount of wastewater.

In particular, in the plating process, since the plating object is immersed in a liquid in a plating tank or a washing tank, the wastewater generated may include heavy metals that may be fatal even in small amounts.

On the other hand, from the point of view of air pollution, even inhalation of a small amount of the vaporized copper compound in the copper plating bath may cause respiratory diseases or severe irritation to the eyes or skin.

Heavy metals such as lead also exist in the form of particles of about 1 micron in the atmosphere, which can be accumulated and introduced into the human body through the respiratory tract, causing various diseases.

In this way, in order to treat wastewater and polluted air generated in the plating plant, the plating plant is equipped with various facilities. A system for treating wastewater and polluted air generated in the conventional plating plant is used in the plating bath and the water washing tank. The polluting air generated is collected in the plating tank hood and the water tank hood, respectively, and is introduced into the vaporization tank through the duct to which the blower is connected.

The polluted atmosphere introduced into the vaporization tank through the inlet of the vaporization tank rises toward the exhaust hood, and is contacted with water sprayed through the nozzle when passing through the carrier tank, and is a cone which is a plurality of unit carriers included in the carrier tank. Alternatively, odors or contaminants are stored together with water in a lower reservoir while contacting a surface such as a porous medium, and the purified air is discharged into the atmosphere through an exhaust hood.

On the other hand, the wastewater generated in the plating bath is separately collected and sent to a specialized treatment device, the drying is treated, and the solids are treated by a separate discharge facility. Waste water generated in the water tank is sent to an external wastewater treatment unit through a drain pipe for treatment.

Such a conventional system for treating wastewater and polluted atmospheres is suitable for treating odors and the like in polluted atmospheres treated in a vaporization tank, but in the treatment of heavy metals in the atmosphere, traces of heavy metals still exist in the atmosphere discharged from the exhaust hood. There is a problem.

In order to remove the organic components in the waste liquid, biochemical methods, chemical oxidation methods, and coagulation precipitation methods have been used.

The biochemical method is a method of removing organic components using microorganisms.

The chemical oxidation method is a method of chemically oxidizing and removing organic substances in wastewater using an oxidizing agent such as hydrogen peroxide, tripotassium permanganate, etc., and the coagulation precipitation method is a method of flocculating and precipitation of organic substances in wastewater using aluminum salt or iron salt. to be.

However, such a conventional method has a problem in that a cost due to the chemical cost is generated by using a chemical such as a flocculant, the waste water treatment cost is increased, a large amount of sludge is generated, as well as a separate sludge to be treated.

Prior patents for resolving this are at least one plating bath, at least one washing tank; A vaporization tank and a waste liquid processor for treating the polluted atmosphere and waste liquid generated in the plating tank and the water washing tank; In order to transfer the waste liquid from which the heavy metal is adsorbed by the heavy metal adsorption composition applied to the surface of the waste liquid processor to the waste water treatment unit, the waste liquid is disposed between the plating bath, the water washing tank and the waste liquid treatment machine, and the waste liquid is disposed. The structure which removes the fats and oils contained in and decomposes | dissolves organic substance, and improves the adsorption capacity of heavy metals and improves water quality significantly is described.

However, in the case of the vaporization tank to purify the steam generated in the plating tank and the water washing tank maintains a constant purification amount corresponding to the limit capacity of the vaporization tank from the beginning, if the purification for a certain time, there is a problem that the efficiency is lowered, It is difficult to condense and reuse.

Prior Patent: Korean Patent Publication No. 10-1803646 (Nov. 24, 2017)

The present invention purifies the vapors containing chemicals and harmful substances generated in each treatment tank of the surface treatment process and at the same time evaporates the wastewater supplied into the vaporization tank to produce steam as saturated steam, thereby reducing the reuse amount of the wastewater. Circulating low-temperature evaporative wastewater reduction wastewater concentration treatment system which reduces the generation of wastewater and condenses steam to be reused in each treatment tank of the surface treatment, thereby reducing the supply of new treatment water and reducing the discharge of wastewater. The purpose is to provide.

According to an aspect of the present invention, there is provided a circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus, including: a heat exchanger for heating through heat of an external heat source; A vaporization tank into which the heated steam is injected to adsorb chemicals and harmful substances in the steam and form steam as saturated steam; A condensation unit condensing the steam passing through the vaporization tank to form condensed water; A filter unit for filtering chemicals and harmful substances remaining in the condensed water condensed in the condensation unit; A treatment tank receiving the filtered condensed water and used in a surface treatment process of treating a surface of an object; A wastewater treatment unit for purifying wastewater used in the treatment tank; Chemicals generated in each treatment tank of the surface treatment process, including a discharge unit for filtering and discharging the waste water treated by the waste water treatment unit and a storage unit for storing the waste water discharged through the discharge unit into the vaporization tank; It purifies the steam containing harmful substances and at the same time evaporates the waste water supplied into the vaporization tank to produce steam as saturated steam, increasing the reuse amount of the waste water, and condensing the steam to reuse in each treatment tank of the surface treatment. It is characterized by.

The vaporization tank, the steam is injected into the body, the body is formed in a cylindrical shape is formed a flow space therein; An inlet formed at a lower portion of the main body and into which steam heated by a heat exchanger is introduced; Filler for adsorbing chemicals and harmful substances of the vapor flowing through the inlet to rise; An injector for spraying wastewater supplied from a storage unit on the top of the filler to uniformly supply the filler; And a purifying body configured to discharge and purify the adsorbed water adsorbed with chemicals and harmful substances through a discharge port through which the vapor passing through the filler is discharged and a discharge port formed in the lower portion of the main body, and drain the purified adsorbed water to the wastewater treatment unit. It is characterized by.

The heat exchanger is equipped with a temperature sensor to measure the temperature of the steam flowing through the inlet portion is less than the temperature set in the control unit provided in the heat exchanger waste heat generated from the heat of the external heat source, treatment tank or heat treatment tank It is characterized in that the steam is heated through the heat exchange in the heat exchanger to a predetermined temperature or more to supply to the vaporization tank.

The present invention purifies steam containing chemicals and harmful substances generated in each treatment tank of the surface treatment process and simultaneously evaporates the waste water supplied into the vaporization tank to generate steam as saturated steam to increase the reuse amount of the waste water. It is effective to let.

In addition, the condensation of the vapor to reuse in each treatment tank of the surface treatment, there is an effect of reducing the discharge of waste water by reducing the supply of new treated water.

1 is an overall configuration diagram of a circulating low-temperature evaporation wastewater reduction wastewater concentration treatment apparatus according to an embodiment of the present invention.
Figure 2 is a graph that changes according to the temperature when steam is injected into the vaporization tank by using the circulating low-temperature evaporation wastewater reduction wastewater concentration treatment apparatus according to the present invention.

Hereinafter, specific embodiments for the practice of the present invention will be described with reference to the drawings. Embodiments of the present invention are intended to illustrate one invention, and the scope of the present invention is not limited to the illustrated embodiments, and the illustrated drawings are only limited to the drawings because only the essential contents are enlarged and additionally omitted for clarity of the invention. It is not to be interpreted.

The present invention is the inlet 50 is the steam generated in each treatment tank 40 of the surface treatment process is collected and introduced; A heat exchanger 80 installed on a flow tube through which the steam collected through the inlet 50 flows and heating the steam through a heat of an external heat source 81 at a predetermined temperature; A vaporization tank 10 in which the heated steam is injected to adsorb chemicals and harmful substances in the steam and form steam as saturated steam; A condensation unit 20 condensing steam passing through the vaporization tank 10 to form condensed water; A filter unit (30) for filtering chemicals and harmful substances remaining in the condensed water condensed in the condensation unit (20); A treatment tank 40 which is input to the filtered condensed water and used in a surface treatment process of treating a surface of an object; A wastewater treatment unit 60 for purifying wastewater used in the treatment tank 40; A discharge part 70 for filtering and discharging the waste water treated by the waste water treatment part 60 and a storage part 90 for storing the waste water discharged through the discharge part 70 and injecting it into the vaporization tank 10. In addition, the purification of the vapor containing the chemicals and harmful substances generated in each treatment tank 40 of the surface treatment process and at the same time to evaporate the waste water supplied into the vaporization tank 10 to generate steam as saturated steam. By increasing the reuse amount of the waste water, it is characterized in that the condensation of steam to reuse in each treatment tank 40 of the surface treatment.

The vaporization tank 10, the steam is injected into the inside, the main body 11 is formed in a cylindrical shape formed therein the flow space 12; An inlet 13 formed at a lower portion of the main body 11 and into which steam heated by the heat exchanger 80 is introduced; Filler 14 for adsorbing the chemicals and harmful substances of the vapor flowing through the inlet 13 to rise; An injector 15 spraying the wastewater supplied from the storage unit 90 on the filler 14 to uniformly supply the filler 14; Through the discharge port 16 through which the steam passing through the filler 14 is discharged and the discharge port 17 formed in the lower portion of the main body 11, the adsorbed water adsorbed with chemicals and harmful substances is discharged and purified, It characterized in that it comprises a purifying body 18 for draining the adsorbed water to the wastewater treatment unit (60).

The heat exchanger 80 is provided with a temperature sensor to measure the temperature of the steam flowing through the inlet 50 to the outside of the heat source 81 when the temperature is set to the control member provided in the heat exchanger 80 It is characterized in that the steam is heated through heat exchange in the heat exchanger 80 above the set temperature through waste heat generated in the heat, the treatment tank 40 or the heat treatment tank 82 to supply to the vaporization tank (10).

1 is an overall configuration diagram of a circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus according to an embodiment of the present invention, in which the steam generated in each treatment tank 40 in the surface treatment process is collected and introduced ( 50); A heat exchanger 80 installed on a flow tube through which the steam collected through the inlet 50 flows and heating the steam through a heat of an external heat source 81 at a predetermined temperature; A vaporization tank 10 in which the heated steam is injected to adsorb chemicals and harmful substances in the steam and form steam as saturated steam; A condensation unit 20 condensing steam passing through the vaporization tank 10 to form condensed water; A filter unit (30) for filtering chemicals and harmful substances remaining in the condensed water condensed in the condensation unit (20); A treatment tank 40 which is input to the filtered condensed water and used in a surface treatment process of treating a surface of an object; A wastewater treatment unit 60 for purifying wastewater used in the treatment tank 40; A discharge part 70 for filtering and discharging the waste water treated by the waste water treatment part 60 and a storage part 90 for storing the waste water discharged through the discharge part 70 and injecting it into the vaporization tank 10. Include.

Referring to FIG. 1, the inlet 50 has a single pipe for collecting steam through a duct and a duct for collecting steam containing chemicals and harmful substances generated in each treatment tank 40 of a surface treatment process. It consists of a collection pipe to be made to flow into the flow pipe.

In the duct, the steam generated in each treatment tank 40 of the surface treatment process is collected through the duct formed on the upper side of each treatment tank 40, and collected through the collecting pipe into the flow pipe and discharged.

To this end, a collecting fan may be formed in the collecting pipe so that steam collected through the duct can be quickly introduced into the flowing pipe.

When steam is introduced into the flow pipe through the inlet 50, the heat exchanger 80 formed on the flow pipe is heated to supply the vapor in the flow pipe below the set temperature to the vaporization tank 10.

At this time, the heat exchanger 80 senses the temperature of the heat exchanged steam through a temperature sensor provided, and if the temperature is less than the temperature set by the control member of the heat exchanger 80, the heat exchange to heat the steam inside the flow pipe, steam If the temperature is above the set temperature to allow steam to flow to the vaporization tank (10) without heating.

The heat exchange unit 80 is heated by using the heat of the external heat source 81 to connect the steam of the flow pipe, the waste heat of the treatment tank 40 or the heat treatment tank 82.

The heat exchange unit 80 performs heat exchange using waste heat generated in each treatment tank 40 when surface treatment or heat treatment in the treatment tank 40 or the heat treatment tank 82, and an external heat source 81. In the case where the heat of the heat treatment tank 82 or the treatment tank 40 is insufficient, a boiler or the like for separately supplying the heat source 81 can be used.

The steam passing through the heat exchange unit 80 is injected into the vaporization tank 10 to adsorb chemicals and harmful substances in the steam and form steam into saturated steam.

The temperature of the steam set in the heat exchange unit 80 is made of 50 ~ 60 ℃.

When the temperature of the steam heated in the heat exchanger 80 is less than 50 ° C., the injected waste water may not be sufficiently heated to be converted into steam. If the temperature exceeds 60 ° C., breakage of the filler 14 may occur due to high temperature. Problems may arise.

The vaporization tank 10, the steam is injected into the inside, the body 11 is formed in a cylindrical shape, the flow space 12 is formed therein, is formed in the lower portion of the body 11, the heat exchange unit 80 In the inlet 13 through which the heated steam flows in, the filler 14 adsorbing the chemicals and harmful substances of the vapor rising through the inlet 13, the storage unit 90 in the upper portion of the filler (14) An injector 15 for spraying the supplied waste water uniformly to the filler 14, a discharge port 16 through which the steam passed through the filler 14 is discharged, and a discharge port 17 formed below the main body 11. It includes a purifying body 18 for discharging the adsorbed water adsorbed chemicals and harmful substances through the purified water, and drained the purified adsorbed water to the wastewater treatment unit (60).

The main body 11 is formed in a cylindrical shape so that a flow space 12 is formed therein, and steam injected into the main body 11 flows upward through the inlet 13 through which gas is injected into the lower part. Chemicals and toxic substances contained in the steam are adsorbed to the waste water sprayed from the upper portion of the filler 14 through the filler 14 formed on the upper side to be stored in the lower portion of the main body 11.

At this time, the waste water is supplied to the waste water stored in the storage unit 90 outside the main body 11 is injected, and the filler material 14 is steam of a predetermined temperature in a wet state with the waste water sprayed through the injection body 15 As is passed, part of the wastewater is evaporated and at the same time chemicals and harmful substances in the vapor are adsorbed into the wastewater and fall.

The inside of the main body 11 may be formed in a vacuum state so that the waste water is easily evaporated through steam, which may be made through a vacuum unit that is separately connected to the outside of the main body 11.

Due to the vacuum part, the pressure inside the main body 11 decreases, so that the evaporation temperature of the wastewater evaporated from the filler 14 decreases, and the vapor may be easily saturated gas.

Wastewater evaporated by the steam in the filler 14 is saturated steam to flow to the condensation unit 20 through the outlet 16 in the absence of harmful substances and chemicals.

The storage unit 90 stores the treated wastewater supplied from the wastewater treatment unit 60 to be sprayed into the main body 11 through the injection body 15 inside the main body 11.

At this time, a pump is provided between the storage unit 90 and the main body 11 to supply wastewater from the storage unit 90 to the spraying body 15 inside the main body 11.

A discharge port 17 is formed in the lower portion of the main body 11 to drain the adsorbed water adsorbed with chemicals and harmful substances, and to purify the adsorbed water drained from the purifying body 18 and then purify the adsorbed water to the wastewater treatment unit 60. It is flowed again to the treatment, and is supplied back to the storage unit 90 with the waste water to be supplied to the vaporization tank (10).

At this time, the adsorbed water drained through the discharge port 17 may be transported to a separate treatment facility for treatment.

The vapor adsorbed with chemicals and harmful substances through the vaporization tank 10 is introduced into the condensation unit 20 in a saturated steam state and is formed as condensed water through condensation.

The condensate formed by condensation in the condensation unit 20 is flowed to the filter unit 30 to filter chemicals and harmful substances remaining in the condensate, and the filtered condensate is used for the surface treatment process of treating the surface of the object. It is re-introduced into the treatment tank 40 to be used and reused in the treatment process.

This may reduce the amount of newly introduced externally treated water and reduce the amount of externally discharged wastewater.

The wastewater used in the treatment process of the treatment tank 40 flows to the wastewater treatment part 60, and the steam generated in the treatment tank 40 flows back into the vaporization tank 10 through the inlet 50.

The wastewater flowing to the wastewater treatment unit 60 is purified by the wastewater treatment unit 60 and flows to the discharge unit 70, and the discharge unit 70 may remain of the wastewater purified by the wastewater treatment unit 60. Chemicals and harmful substances can be filtered again to drain to the outside or re-introduced into the reservoir to be sprayed into the vaporization tank 10.

2 is a graph that changes according to temperature when steam is heated and injected into a vaporization tank using a circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus according to the present invention.

Referring to FIG. 2, when the temperature of steam is increased to the above configuration and injected into the vaporization tank 10, the efficiency according to the temperature is shown in Table 1.

Temperature (℃) -20 -10 0 10 20 30 40 50 60 70 80 90 100 Air pressure One 3 6 12 23 42 74 123 199 312 475 705 1022 Weight (g) One 2 5 9 17 30 51 83 130 197 292 421 594

As shown in Table 1, the temperature of the wastewater used in the general vaporization tank 10 is 30 degrees, and the present invention, which heats it, is heated to 50 to 60 ° C, which is due to the pressure inside the vaporization tank 10. This is because the evaporation temperature is lowered from 100 ° C to 50 to 60 ° C.

Since the best efficiency range according to the evaporation temperature of the waste water is heated to 50 to 60 ° C., the temperature of steam heated by the heat exchanger 80 is set to 50 to 60 ° C.

Of course, the temperature of the steam may be heated to 60 ° C. or higher, but this does not heat the temperature above 60 ° C., as the efficiency is lowered compared to the fuel and heat heating temperature required for heating.

The present invention thus achieved purifies the vapors containing chemicals and harmful substances generated in each treatment tank of the surface treatment process and at the same time evaporates the wastewater supplied into the vaporization tank to produce steam as saturated steam to recycle the wastewater. Increasing the amount of use, has the effect of reducing the generation of waste water.

In addition, the condensation of the vapor to be reused in each treatment tank of the surface treatment, there is an effect of reducing the discharge of waste water by reducing the supply of new treatment water.

The side plate opening bolt and screw plating barrel structure as described above is not limited to the configuration and operation of the embodiments described above. The above embodiments may be configured such that various modifications may be made by selectively combining all or part of the embodiments.

10: vaporization tank 11: the body
12: flow space 13: inlet
14: Filler 15: Injector
16 discharge port 17 discharge port
18: Purifying body
20: condensation unit 30: filter unit
40: treatment tank 50: inlet
60: wastewater treatment unit 70: discharge unit
80: heat exchanger 81: heat source
82: heat treatment tank
90: storage

Claims (3)

An inlet 50 through which steam generated in each treatment tank 40 of the surface treatment process is collected and introduced;
A heat exchanger 80 installed on a flow tube through which the steam collected through the inlet 50 flows and heating the steam through a heat of an external heat source 81 at a predetermined temperature;
A vaporization tank 10 in which the heated steam is injected to adsorb chemicals and harmful substances in the steam and form steam as saturated steam;
A condensation unit 20 condensing steam passing through the vaporization tank 10 to form condensed water;
A filter unit (30) for filtering chemicals and harmful substances remaining in the condensed water condensed in the condensation unit (20);
A treatment tank 40 which is input to the filtered condensed water and used in a surface treatment process of treating a surface of an object;
A wastewater treatment unit 60 for purifying wastewater used in the treatment tank 40;
A discharge part 70 for filtering and discharging the waste water treated by the waste water treatment part 60;
Including a storage unit 90 for storing the waste water discharged through the discharge unit 70 and injected into the vaporization tank 10,
Purifying steam containing chemicals and harmful substances generated in each treatment tank 40 of the surface treatment process and simultaneously evaporating the waste water supplied into the vaporization tank 10 to generate steam as saturated steam to Increase the reuse amount, condensing the steam to reuse in each treatment tank 40 of the surface treatment circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus.
The method of claim 1,
The vaporization tank 10,
A main body 11 into which the steam is injected and formed in a cylindrical shape to form a flow space 12 therein;
An inlet 13 formed at a lower portion of the main body 11 and into which steam heated by the heat exchanger 80 is introduced;
Filler 14 for adsorbing the chemicals and harmful substances of the vapor flowing through the inlet 13 to rise;
An injector 15 spraying the wastewater supplied from the storage 90 on the filler 14 to uniformly supply the filler 14;
An outlet 16 through which the steam passed through the filler 14 is discharged;
The purifying body 18 discharges and purifies the adsorbed water adsorbed with chemicals and harmful substances through the discharge port 17 formed in the lower part of the main body 11, and drains the purified adsorbed water to the wastewater treatment unit 60. Circulating low-temperature evaporative wastewater reduction wastewater concentration treatment apparatus, characterized in that.
The method of claim 1,
The heat exchanger 80 is installed with a temperature sensor to measure the temperature of the steam flowing through the inlet 50 to the outside of the heat source 81 when the temperature is set to the control member provided in the heat exchanger 80 The heat, the heat through the waste heat generated in the treatment tank 40 or the heat treatment tank 82 is heated to the vaporization tank 10 by heating the heat exchange in the heat exchange unit 80 over a predetermined temperature to supply to the vaporization tank (10) Low-temperature evaporation wastewater reduction wastewater concentration treatment device.

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