KR102240349B1 - Painting wastewater evaporation system - Google Patents

Abstract

The present invention relates to a painting wastewater evaporation system capable of evaporating various volatile organic substances contained in painting wastewater by heating the painting wastewater. The painting wastewater evaporation system according to the present invention comprises: a storage tank (20) for storing painting wastewater; a first heat exchanger (30) for preheating the paint wastewater of the storage tank (20); an evaporation tank (60) for heating the painting wastewater of the first heat exchanger (30) to evaporate the painting wastewater and evaporating harmful volatile organic substances contained in the coating wastewater; and a treatment water tank (70) for collecting the painting wastewater discharged from the evaporation tank (60); wherein the heat of the painting wastewater of the treatment water tank (70) is transmitted to a heat medium oil of the first heat exchanger (30), and the painting wastewater is cooled and discharged.

Description

Painting wastewater evaporation system

The present invention relates to a coating wastewater evaporation system capable of removing residual volatile organic matter after physicochemical treatment of wastewater generated during a coating process.

Painting wastewater is wastewater that is used in the painting process and is drained, and contains various volatile organic substances such as methanol, ethanol, thinner, etc., and must be discharged after removing them or drained to the associated wastewater treatment facility for secondary treatment.

Typically, coating wastewater is treated through a coagulation and precipitation process using physicochemical treatments such as chemicals, activated carbon, air bubbles, and agitation, but this physicochemical treatment has a problem in that it is not possible to remove volatile organic matter present in the wastewater. .

For reference, the following prior art documents have listed four recent prior art documents searched for "painting wastewater" as a keyword through the Patent Information Net Keyprise, and the technical fields related to the present invention with reference to the following prior art documents You will be able to grasp the background technology and its development status.

Patent registration publication 1017956940000. Patent registration publication 1016625210000. Patent registration publication 1015659470000. Patent registration publication 1009862560000.

The present invention has been developed to solve the conventional problems mentioned in the background art, and in particular, it is an object of the present invention to heat paint wastewater to evaporate and remove volatile organic matter.

The present invention is a means for solving the problem, the collection tank for collecting the coating wastewater; A storage tank for pumping and storing the painting wastewater of the collection tank; A first heat exchanger that pumps and preheats the coating wastewater of the storage tag; A second heat exchanger that pumps and heats the painting wastewater of the first heat exchanger; A boiler for heating the heat medium oil of the second heat exchanger; The painting wastewater of the second heat exchanger is reheated by a heater and at the same time, bubbles are generated so that the evaporation reaction occurs actively, and a climbing bulkhead is installed in the moving channel so that the toxic substances contained in the painting wastewater are evaporated. Evaporation tank; A treated water tank for collecting coating wastewater from the evaporation tank; A coating wastewater evaporation system is proposed, wherein the ceramic is cooled and drained while replacing the coating wastewater of the treated water tank with the heat medium oil of the first heat exchanger.

According to the means of the present invention, the coating wastewater is preheated, heated, reheated and evaporated, and the treated coating wastewater is collected and used for preheating, and then cooled and drained to save heating energy that rapidly increases the temperature of the coating wastewater. In addition to being able to do so, it has the effect of remarkably reducing preheating costs, cooling costs, and operating costs, and reheating during the reheating process while slowly and continuously increasing the temperature of the painting wastewater, and delayed transfer of the reheated painting wastewater. At the same time, by generating air bubbles, the evaporation reaction is actively performed, thereby having the effect of completely removing volatile organic matter from the coating wastewater.

1 is an exemplary view of the present invention
2 is a detailed view of the heat exchanger of FIG. 1
3 is a detailed view of the evaporation tank of FIG. 1
4 to 6 are application diagrams of the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the accompanying drawings may be exaggerated, omitted, or schematically illustrated for convenience of explanation of the main parts, and terms and names used in the description are implicitly defined by the shape, function, role, etc. of the composition, rather than a dictionary meaning. The description of the direction is determined based on the direction initially presented from the drawing initially presented, and the description of the location is determined inside and outside the center of each component or the center of the circle. In addition, since detailed descriptions of pre-registered known technologies and conventional technologies may obscure the subject matter, they are omitted or replaced with simple symbols or names. In addition, the detailed structure, shape, shape, arrangement, size, and the like of the configuration that can be identified through the drawings, the operation of the configuration that can be inferred through the drawings, and the resulting effects may also obscure the subject, so a detailed description will be omitted. In addition, bolts, welds, holes, etc. that are applied for bonding between configurations may be omitted from the drawing because the subject matter may be blurred, and the shape of the plane is circular or square unless the shape of the configuration is specifically specified. In this case, the plan view may be omitted.

Hereinafter, the present invention will be described with reference to FIG. 1.

As described in the city and the solution means of the problem, the present invention includes a collection tank for collecting coating wastewater; A storage tank for pumping and storing the painting wastewater of the collection tank; A first heat exchanger that pumps and preheats the coating wastewater of the storage tag; A second heat exchanger that pumps and heats the painting wastewater of the first heat exchanger; A boiler for heating the heat medium oil of the second heat exchanger; The painting wastewater of the second heat exchanger is reheated by a heater and at the same time, bubbles are generated so that the evaporation reaction occurs actively, and a climbing bulkhead is installed in the moving channel so that the toxic substances contained in the painting wastewater are evaporated. Evaporation tank; A treated water tank for collecting coating wastewater from the evaporation tank; A coating wastewater evaporation system is proposed, wherein the ceramic is cooled and drained while replacing the coating wastewater of the treated water tank with the heat medium oil of the first heat exchanger.

In this way, as described in the effect of the invention, the painting wastewater is preheated, heated, reheated and evaporated, and the treated painting wastewater is collected and used for preheating, then cooled and drained to rapidly increase the temperature of the painting wastewater. In addition to saving energy, it has the effect of remarkably reducing preheating costs, cooling costs, and operating costs.It is reheated during the reheating process while slowly and continuously increasing the temperature of the painting wastewater. It has the effect of completely removing volatile organic matter from coating wastewater by causing the evaporation reaction to occur actively by generating air bubbles at the same time as the delayed transport.

Below, Fig. 1 And Fig. 2 To Figure 3 Each component included in the present invention will be described in detail with reference to the following.

First, the collection tank 10 is smaller than the storage tank 20 as shown, and a pump P is installed therein, and it is capable of pumping the coating wastewater collected by the pump and supplying it to the storage tank 20. It consists of a composition.

In this way, there is an effect that coating wastewater can be easily collected by vehicles or continuously collected until it reaches a certain amount, and there is an effect of facilitating independent utilization of the storage tank 20 by handing over the collected coating wastewater at once. , There is an effect of stably supplying the coating wastewater without interrupting the continuous supply or reducing the speed.

On the other hand, the collection tank 10 is preferably present as much as possible to obtain the above-described effect, but it is not a necessary component when the device of the present invention is connected to the wastewater drainage line of a painting factory, but the device of the present invention is a painting factory. If it is not installed inside or is not connected to the wastewater drainage line, it is preferable that it is configured and equipped to have a size and height that can be injected into a vehicle or the like.

Next, as shown, the storage tank 20 is larger than the collection tank 10 and is made in a large size, and an inclined recessed part 21 is formed at the bottom of the inside, and the discharge pipe 22 is formed at the inclined recessed part. It consists of a connected configuration.

In this way, not only can the painting wastewater be stored in a large amount, but also when the painting wastewater is treated with such mass storage, it can be supplied stably as well as continuous supply.In particular, the stagnation time of the painting wastewater is long and foreign substances such as heavy metals settle. It has the effect of being able to filter out foreign matter by discharging it.

Next, as shown in the first heat exchanger 30, the inlet is connected to the storage tank 20, the outlet is connected to the second heat exchanger 40, and the painting wastewater by the first pump P1. Is continuously transferred, and the heat medium oil inlet of the body is connected to the treated water tank 70, and the outlet is configured to be connected to the drain pipe 80.

In this way, there is an effect of preheating the coating wastewater of the storage tank 20 with the waste heat of the treated water tank 70 and the coating wastewater, and by doing so, not only the preheating energy can be saved, but also the discharge regulation temperature of the final effluent water is reduced. There is an effect that can be cooled and discharged without mobilizing a separate cooling means.

Meanwhile, the first heat exchanger 30 and the second heat exchanger 40 to be described below are filled with heat medium oil 31 in the interior of the enclosure as shown, and the interior of the enclosure is filled with coating wastewater in a zigzag form. The transfer pipe 32 is connected to pass through, and the diaphragm 33 is installed in a zigzag shape so that the heat medium oil passes between the transfer pipes inside the enclosure.

In this way, the heating medium oil is filled in the interior of the enclosure for delayed transfer, and the coating wastewater is delayed and transferred in a zigzag form, and the coating wastewater is easily heated by the heat of the heating medium oil, and the heating medium oil is relatively easily cooled by the coating wastewater. It works.

Next, as shown in the second heat exchanger 40, the inlet is connected to the first heat exchanger 30, the outlet is connected to the evaporation tank 60, and the coating wastewater by the first pump P1. Is continuously transferred, and the heat medium oil inlet and outlet of the body are configured to be connected to the boiler 50.

In this way, there is an effect of heating the coating wastewater transferred from the first heat exchanger 30, and since the passing coating wastewater has already been preheated, it is easy to heat up to the desired temperature, and the heat loss of the heat medium oil is remarkable. There is an effect of saving.

Next, the boiler 50 is filled with the heat medium oil in the tank as shown, the heat medium oil may be heating oil or water, and a plurality of heaters 51 for heating the heat medium oil are installed, and a second heat exchanger It is connected to the body heat medium oil inlet and outlet of the body 40, is configured to be circulated by the second pump (P2), and consists of a configuration in which an electric stirring blade 52 capable of agitating the heat medium oil in the tank is installed.

In this way, by independently circulating and heating the heat medium oil of the second heat exchanger 40, there is an effect of facilitating heating of the coating wastewater preheated from the second heat exchanger 40, and at the same time, the second heat exchanger 40 ), since the coating wastewater is preheated, heat loss of the heat medium oil is reduced, so it is easy to maintain the temperature of the heat medium oil, as well as the effect of reducing the power consumption of the heater 63. In addition to stabilizing the condition, there is an effect of equalizing the temperature of the heating medium oil by evenly mixing the heating medium oil in the tank.

Next, as shown in the evaporation tank 60, the inlet is connected to the second heat exchanger 40, the outlet is connected to the treated water tank 70, and the coating wastewater is It is supplied, and the height of the outlet is higher than the inlet of the treated water tank 70, so that the coating wastewater is discharged to the treated water tank 70 by a drop, and the transport path inside the tank is made up of a double layer, and the upper end of the upper layer of the double layer The coating wastewater is inputted into the furnace, and the coating wastewater is discharged to the lower end of the lower layer of the duplex layer, and a vertical supply pipe 61 is installed from the upper rear end of the upper layer to the rear end of the lower layer so that the coating wastewater climbs from the upper layer to the lower layer. It is transferred, and the bulkhead 62 is arranged at regular intervals with an upper and lower step on the transfer path of each floor, and the painting wastewater of each floor is transported by climbing beyond the step of the bulkhead 62, while being caught by the bulkhead 62 and congested. And, a bubble generating pipe capable of generating a plurality of heaters 63 and bubbles 64 is installed at the bottom of each floor, and the bubbles 64 of the bubble generating pipe are air installed outside the evaporation tank 60. It consists of a configuration generated by the blower (65).

In this way, there is an effect that the coating wastewater in the tank can stay for a long time by the double layer, and the bulkhead 62 is installed with an upper and lower step in each layer of the double layer, so that the coating wastewater can be climbed and transported and is further delayed. In addition to being effective, it is easy to increase and maintain the reheating temperature by reheating it by the heater 63 in a thinly spread state, and since the painting wastewater is introduced in a pre-heated state, it reaches the desired reheating temperature. It is not only easy to raise it with the heater 63, but also has the effect of saving the heat energy of the heater 63, and the diffusion of the air bubbles 64 by continuously supplying the air bubbles 64 in the state where the coating wastewater is spread. Not only is the reaction active, but also the evaporation reaction of the coating wastewater and the effect of causing harmful volatile gas to occur actively. Especially, in the case of dichloromethane, while maintaining the evaporation temperature for a long time, it is also decomposed with water by acting as a bubble (64) reaction The action takes place actively and has the effect of making this happen perfectly.

Next, the treated water tank 70 is connected to the evaporation tank 60 and the inlet as shown, and is introduced by an outlet drop of the evaporation tank 60, and the outlet is the body of the first heat exchanger 30 It consists of a configuration that is connected to the drain pipe 80 through the heat medium oil inlet and outlet.

In this way, there is an effect of collecting and storing the painting wastewater discharged from the evaporation tank 60, as well as using the waste heat reheated from the evaporation tank 60, as described in the first heat exchanger (30). ), there is an effect of preheating the coating wastewater, and at the same time, since the ceramic is cooled, there is an effect that it can be cooled and discharged without using a separate cooling means.

Although not described above, each tank includes a water level sensor, a temperature sensor, and a water quality sensor, and includes a separate control panel for operating each tank. Accordingly, by controlling the running speed of the pump, it is possible to control the transfer speed of coating wastewater and the heating temperature of the boiler and the heater of the evaporation tank.

Less, again Figure 1 The method of use of the present invention will be described with reference to the following.

As shown in the present invention, when the water level of the storage tank 20 taken over from the collection tank 10 reaches a satisfactory water level, the coating wastewater stored in the storage tank 20 is continuously transferred from the operation of the first pump P1. Typical operation starts, and the coating wastewater is preheated through the first heat exchanger (30), heated through the second heat exchanger (40), and then evaporated volatile organic matter through the evaporation tank (60), and then treated. After being collected in the water tank 70, it is operated in such a manner that it is drained through the first heat exchanger 30 in a cooled state.

In this way, as well as continuous treatment is possible, there is an effect of efficiently adjusting the transfer speed, desired heating temperature, etc. according to the state of the coating wastewater, and there is an effect of enabling efficient treatment with small heat energy.

Below, Figure 3 The application of the present invention will be described with reference to the following.

As shown, in the present invention, a water quality sensor 71 for detecting the water quality of painting wastewater is installed in the treated water tank 70, and a pipe is provided in the heat medium oil drain pipe 80 of the first heat exchanger 30. A recovery pipe 72 is installed to diverge and be re-introduced into the storage tank 20, and a branch valve (V) is installed in the branch to paint the treated water tank 70 according to the detection of the water quality sensor. It may include recovering the wastewater and allowing it to be re-introduced into the storage tank 20.

In this way, when the quality of the final treated coating wastewater is not satisfied, the coating wastewater can be re-introduced into the storage tank 20 for reprocessing, and thus the water quality treatment capacity is further improved, as well as the desired treatment. It has the effect of discharging the water according to the perfect quality.

Below, Figure 4 The application of the present invention will be described with reference to the following.

As shown, in the present invention, a heat exchange pipe 90 is installed in a zigzag shape under the storage tank 20, and the inlet and outlet of the heat exchange pipe are from the treated water tank 70 to the first heat exchanger 30. It is connected to the drain pipe 80 that is drained through, and preheats the coating wastewater of the storage tank 20 to the coating wastewater drained to the first heat exchanger 30 and is drained through the first heat exchanger 30 at the same time. It may include re-cooling the coating wastewater to be drained.

In this way, there is an effect of increasing the temperature of the coating wastewater stored in the storage tank 20 to preheat initially, and at the same time, there is an effect that the temperature of the final coating wastewater can be cooled even lower. It has the effect of making it easier to heat as well as to cool.

In other words, in this way, the coating wastewater is preheated, re-preheated, heated, reheated and evaporated, and the treated coating wastewater is used for re-preheating, cooling, preheating, and recooled and drained, so the overall operation method is different. As it loses, it has the effect of improving more and more efficiently.

Below, Figure 5 The application of the present invention will be described with reference to the following.

As shown in the present invention, as shown in FIG. 4, the water quality sensor 71 is installed in the treated water tank 70 to detect the water quality of the coating wastewater, and in the drain pipe 80 of the heat exchange pipe 90, FIG. As described above, a recovery pipe 72 for branching the pipe to be re-introduced into the storage tank 20 is installed, and a branch valve V is installed in the branch, and the treated water tank ( It may include recovering the painting wastewater of 70) and re-introducing it to the storage tank 20.

In this way, when the quality of the final coating wastewater is not satisfied, as shown in FIG. 4, the coating wastewater can be re-introduced into the storage tank 20 to be reprocessed. There is an effect that can guarantee the water quality.

Below, Figure 6 The application of the present invention will be described with reference to the following.

The present invention most preferably satisfies all of the above-described components, but it can be configured to obtain the effects of the present invention while minimizing the components included in the present invention in consideration of the conditions and expenses of the field.

To this end, the present invention includes a storage tank 20 for storing coating wastewater as shown; A first heat exchanger (30) for preheating the coating wastewater of the storage tank (20); An evaporation tank 60 for heating the painting wastewater of the first heat exchanger 30 to evaporate the painting wastewater and evaporate harmful volatile organic matter contained in the painting wastewater; A treated water tank 70 for collecting coating wastewater discharged from the evaporation tank 60; It may be configured to allow the ceramic to be cooled and drained while being replaced by the heat medium oil of the first heat exchanger 30 as the coating wastewater of the treated water tank 70.

That is, the configuration is minimized by removing the collection tank 10, the second heat exchanger 40, and the boiler 50 from Fig. 1, and it is used to preheat and heat the painting wastewater to evaporate and preheat the painting wastewater. It can be drained by utilizing the cooling method.

In this way, by minimizing the configuration of the present invention, it is possible to significantly reduce installation costs, space, and operating costs, as well as effective treatment of coating wastewater. It can be used as a claim of.

On the other hand, when FIG. 5 is to increase its capability, the expansion cost can be reduced by first adopting the configurations of FIGS. 4 and 5 before expanding to the configuration of FIG. 1.

As described above, the description of the present invention has been completed, and the present invention is a drawing of the configuration of the present invention and specific components included in the configuration in order to help understand the principle of the configuration to be pursued in the present invention. Based on the description, the structure, shape, shape, arrangement, direction, and quantity are determined in consideration of the principle to be pursued, and the configuration and its specific components included in the present invention can be variously changed as necessary. There will be. The configuration and its specific components presented in the present invention illustrate the effect that a person skilled in the art wants to obtain from the present invention and which principle is most preferable to apply in order to obtain a better effect from the effect. I did it. Accordingly, the present invention is most preferable to complete the present invention including all of the above-described configurations, but can be completed by selecting or excluding some of the above-described configurations according to cost reduction, convenience of manufacturing, environmental conditions, or necessity. In addition, one or part of the composition can be separated and merged with another composition to complete. In addition, each configuration described above may be independently applied to other technical fields other than this technical field in consideration of principles, uses, functions, roles, actions, effects, and the like. Based on this, the scope of the rights of the present invention was specified in the range that encompasses the claims of the present invention as possible, and the order was determined from the claims having broad rights, and through this, if a person having ordinary knowledge in the technical field, the above It seems that the gist to be pursued in the present invention can be sufficiently grasped through one specific content and the claims to be described below, and the effect on the part which is illustrated but not described will be sufficiently inferred through the drawings. Accordingly, a person of ordinary skill in the art will be able to apply various modifications and changes in this technical field based on the contents mentioned in the present invention, thereby further increasing the efficiency in use as well as the development of the technical field.

Claims (3)

A storage tank 20 for storing painting wastewater; A first heat exchanger (30) for preheating the painting wastewater of the storage tank (20); An evaporation tank 60 for heating the coating wastewater of the first heat exchanger 30 to evaporate the coating wastewater and evaporate harmful volatile organic matter contained in the coating wastewater; A treated water tank 70 for collecting coating wastewater discharged from the evaporation tank 60; Including that the painting wastewater of the treated water tank 70 is replaced with the heat medium oil of the first heat exchanger 30, and the porcelain is cooled and drained,
A collection tank 10 installed at the front end of the storage tank 20 to collect painting wastewater and supply the collected painting wastewater to the storage tank 20; The second heat exchanger (40) is connected and installed between the first heat exchanger (30) and the evaporation tank (60), and heats the coating wastewater drained through the first heat exchanger (30) and supplies it to the evaporation tank (60). ); A boiler 50 installed on one side of the second heat exchanger 40, connected to the heat medium oil inlet and outlet of the second heat exchanger 40, and heating the heat medium oil of the second heat exchanger 40; Including any one or two or more of,
The first and second heat exchangers (30, 40) are filled with heat medium oil (31) in the interior of the enclosure, and the transfer pipe (32) is connected so that the coating wastewater passes through the interior of the enclosure in a zigzag form, and the enclosure It consists of a configuration in which the diaphragm 33 is installed in a zigzag shape so that the heat medium oil passes between the transfer pipes therein;
In the evaporation tank 60, the transport path within the tank is made of a double layer, and a vertical supply pipe 61 is installed from the upper rear end of the upper layer to the rear end of the lower layer, so that the paint wastewater is transported ascending from the upper layer to the lower layer, Bulkheads 62 are arranged at regular intervals on the transfer path of each floor, and the painting wastewater of each floor is transported by climbing beyond the step of the bulkhead 62 and is trapped by the bulkhead 62, and each It consists of a configuration in which a plurality of heaters 63 and bubble generating pipes capable of generating bubbles 64 are installed at the bottom of the floor;
A water quality detection sensor 71 for detecting the water quality of the coating wastewater is installed in the treated water tank 70, and a pipe is branched to the heat medium oil drain pipe 80 of the first heat exchanger 30, and the storage tank 20 A recovery pipe 72 to be re-introduced into the furnace is installed, and a branch valve (V) is installed in the branch to recover the coating wastewater from the treated water tank 70 according to the detection of the water quality sensor, and the storage tank 20 ) To be re-introduced;
A heat exchange pipe 90 is installed in a zigzag form under the storage tank 20, and the inlet and outlet of the heat exchange pipe are drained from the treated water tank 70 through the first heat exchanger 30. ), preheating the painting wastewater of the storage tank 20 to the painting wastewater drained to the first heat exchanger 30, and recooling the painting wastewater drained through the first heat exchanger 30 to drain the water. What to do;
A water quality sensor 71 that detects the water quality of the painting wastewater is installed in the treated water tank 70, and the pipe is branched into the drain pipe 80 of the heat exchange pipe 90 to be reintroduced into the storage tank 20. A recovery pipe 72 is installed, and a branch valve (V) is installed in the branch to recover the coating wastewater from the treated water tank 70 according to the detection of the water quality sensor, and return to the storage tank 20. Allowing reintroduction;
Painting wastewater evaporation system comprising any one or two or more of. delete delete

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