KR0144768B1 - Evaporative Wastewater Treatment System Using Electrode Heating Plate - Google Patents

Abstract

The present invention is a method of heating and evaporating wastewater, including industrial wastewater containing chemicals discharged from various factories, livestock wastewater or waste leachate from ranch, without using a separate flocculant of chemicals. After sludge), water vapor is condensed and reduced to water to be collected in the collecting tank, and the sludge can be collected in the sludge tank separately, so that the wastewater can be treated more efficiently. It is about.

The present invention is a heating evaporation means for the (+), (-) electrode heating plate alternately installed in a staircase to allow the evaporation of the waste water flows step by step, and the water vapor supplied from the heat evaporation means and the waste water supplied from the waste water storage tank Heat exchange means for heat exchange with each other, a vacuum pump for depressurizing both the heating evaporation chamber and the heat exchange chamber, and a pressure reducing means equipped with a blower to lower the boiling point of the waste water to promote evaporation of the waste water, and then condensate the water vapor by condensation. The sludge of the foreign substance, which is stored and discharged in the wastewater, is collected, stored in a sludge tank, and then disposed of in a sludge tank, so that the wastewater can be purified more completely.

Description

Evaporative Wastewater Treatment System Using Electrode Heating Plate

1 is a schematic diagram of an overall configuration for explaining the present invention.

2 is a wire connection configuration of an electrode heating plate which is an essential part of the present invention.

3 is a partially enlarged cross-sectional view showing an operating state of an electrode heating plate which is an essential part of the present invention.

4 is an enlarged cross-sectional view of the condensation tank of the present invention.

* Explanation of symbols for main parts of the drawings

1: heating evaporation means 2: (+) electrode heating plate

3: (-) electrode heating plate 4: control step

5: wastewater supply pipe 6: steam discharge pipe

7: sludge discharge pipe 8: connector

9: heat exchange means 10a, 10b: upper, lower support plate

11: heat exchange tube 12: wastewater storage tank

13: Wastewater circulation pipe 14: discharge guide plate

15a, 15b: connector 16a, 16b: cooling device

17a, 17b, 17c 17d: connection passage 18: pressure reducing means

19: condensate collection space 20a, 20b, 20c: condensate discharge pipe

21: condensate reservoir 22, 23, 26, 2734: valve

24, 28; pump 25: discharge pipe

29: current supply device 30a, 30b: (+), (-) electrode wire

31: blower 32: vacuum pump

33: sludge collection tank

The present invention is a method of heating and evaporating wastewater, such as industrial wastewater containing chemicals discharged from various Confucius, livestock wastewater or leachate leachate of a ranch, without using a separate chemical flocculant, the wastewater is steam and sludge ( After the separation by sludge, the water vapor is condensed and reduced to water to be collected in the collecting tank, and the sludge can be collected separately in the sludge tank, so that the wastewater treatment system using the electrode heating plate can be treated more efficiently. will be.

In general, as a method of purifying industrial wastewater or livestock wastewater, the wastewater is stored in one place, and thereafter, a flocculant is administered, whereby foreign substances such as suspended solids contained in the wastewater are entangled with each other and settle down, or the residue is filtered. The water treatment device has been mainly used to purify the waste water by the screen device.

However, the former method of the above water treatment methods is forcibly settling with a chemical coagulant to sediment the foreign matter contained in the wastewater. Even if the coagulant is administered, all the foreign matter contained in the wastewater does not aggregate or settle. Some of them remain suspended in the wastewater, which makes it difficult to obtain a good effect for the purification of the wastewater. Particularly, when the flocculant administered in the wastewater remains in the wastewater without sedimentation with sludge, it causes secondary pollution. The latter method is to filter and remove foreign substances contained in the waste water by flowing the waste water to the screen device. As there was disadvantage that we could not do, we see waste water In order to clarify the treatment, there is a problem that the secondary water treatment device must be operated in parallel, and thus the water treatment facility has been required to be enlarged.

However, the installation of a large-scale water treatment device was practically difficult in small and medium-sized enterprises or small businesses. In particular, all water treatment devices to date have a problem in that foreign substances cannot be more completely removed in purifying wastewater.

Accordingly, the present invention has been made with the object of providing a water treatment apparatus for completely purifying waste water continuously as a small-scale facility and solution to all problems appearing in the conventional water treatment apparatus as described above.

In order to achieve the above object, the present invention provides a heating evaporation means for the (+), (-) electrode heating plate alternately installed in a staircase so that the waste water flows down step by step, and steam generated by the heating evaporation means. And heat exchange means for exchanging waste water from the waste water storage tank, and a vacuum pump for depressurizing both the heating evaporation chamber and the heat exchange chamber, and a decompression means equipped with a blower to lower the boiling point of the waste water to promote evaporation of the waste water, and then evaporate. The condensed water vapor is condensed and stored in the condensate tank and then discharged.The sludge of the foreign substance from which water is completely removed is collected and stored in the sludge tank, and then disposed of. The invention will be described in detail with reference to the accompanying drawings.

1 is a system diagram showing the overall configuration for the present invention, the heating evaporation means (1) having an appropriate inclination (+), (-) electrode heating plate (2) (3) are alternately installed stepwise At the tip of the (+) electrode heating plate or (-) electrode heating plate (3), a control step (4) is formed to control the flow of waste water so that the waste water can be contacted with the (+) electrode heating plate (2). It is.

The (+) (-) electrode heating plate (2) (3) is composed of a nickel or chromium-based alloy used as a filament of carbon or a light bulb, such as a material having a good current and a large heat generating effect. The (+) (-) electrode heating plates of the (+) (-) electrode heating plate (2) allows the conduction of the (+) (-) electrode heating plates (2) and (3) when the wastewater supplied from the top of the heating evaporation means (1) flows down the steps The positive (+) electrode heating plates are configured to generate heat by the applied current to heat and evaporate the wastewater.

The upper part of the heating evaporation means (1) is formed with a wastewater supply pipe (5) for supplying wastewater and a steam discharge pipe (6) for discharging evaporated water vapor, and a sludge discharge pipe (7) and a connection pipe (8) for discharging sludge. ) Are formed respectively.

The heat evaporation means (1) consists of several heat exchange means (9) for condensing the supply of waste water and evaporated water vapor by heat exchange action, the upper and lower support plates (10a) (10b) sealing the upper and lower inside A plurality of heat exchange tubes 11 are installed, and the upper and lower ends of each heat exchange tube are inclined, and the material is made of acrylic resin having a good condensation effect. The inclined upper and lower ends of the heat exchange tubes 11 are configured to communicate with the inner and lower portions of the heat exchange means 9, and the waste water is circulated and supplied from the waste water storage tank 12 to the upper side of the first heat exchange means 9. The waste water circulation pipe 13 is connected, and between the upper and lower support plates 10a and 10b of each heat exchange means 9, the discharge passage 14a is zigzag-shaped so as to delay the flow of waste water. The discharge guide plate 14 to be formed is arranged in multiple stages.

The heat exchange means (9) is connected to the connecting pipe (15a, 15b) that can sequentially supply the waste water, each of the connection pipe is provided with a cooling device (16a, 16b) for cooling the waste water flowing through the connecting pipe The cooling device is preferably air-cooled using external air.

The heat exchange means 9 are connected to the upper and lower portions of the connecting passages 17a, 17b, 17c, and 17d. The first and second heat exchange means 9 are connected to the upper portion of the heat exchange means 9, and the pressure reducing means 18 Is connected to the bottom, and the connecting passage 17b on the lower side is provided with a condensate collecting space 19 to which the condensate discharge pipe 20b is connected while connecting the first and second heat exchange means 9, and the connecting passage 17c is connected to the second and the second heat exchange means 9, respectively. The upper part of the third heat exchange means 9 is connected. In addition, a vapor discharge pipe 6 and a condensate discharge pipe 20a are connected to the connection passage 17d formed on the lower side of the third heat exchange means, and the lower side of the decompression means 18 communicates with the heating evaporation means 1. The connecting pipe 8 and the condensate discharge pipe 20c are connected, and each of the condensate discharge pipes 20a, 20b, and 20c is connected to the filling water storage tank 21, and the valve 22 is installed respectively. It is.

The condensate storage tank 21 is provided with a discharge pipe 25 in which a valve 23 and a pump 24 are installed.

And the lower side of the third heat exchange means (9) is connected to the wastewater supply pipe (5) for supplying wastewater to the heating evaporation means (1), which is also provided with a valve 26, the first in the wastewater storage tank (12) The valve 27 and the pump 28 are also provided in the wastewater circulation pipe 13 which supplies wastewater to the heat exchange means 9.

In the current supply device 29 for supplying current to the heating evaporation means 1, the positive electrode line 30a is connected to the positive electrode heating plates 2 as shown in FIG. The electrode wire 30b is connected to the (-) electrode heating plate 3, and the ground wire 30c is grounded to the body of the heating evaporation means 1.

On the other hand, a blower 31 for forcibly circulating water vapor introduced into each of the heat exchanging means 9 is installed inside the decompression means 18, and the decompression means 18 as well as the heat evaporation means. (1) and a vacuum pump 32 for lowering the internal pressure of each of the heat exchange means 9 is provided, which lowers the pressure of the heating evaporation means 1 and the (+) (-) electrode heating plate 2 ( By lowering the boiling point of the heated wastewater due to the exothermic heat of 3), the wastewater can be heated and evaporated at a low temperature, and the condensation of the evaporated water vapor can be increased and the condensation of the heat exchange means 9 can be promoted. will be.

Reference numeral 33 denotes a sludge collection tank, and 34 denotes a valve installed at the sludge discharge port of the sludge collection tank.

Referring to the process and the effect of the purification of the wastewater with the present invention as a member as follows.

Even when the switch of the current supply device 29 is turned on without the waste water being supplied to the heating evaporation means 1, since the (+) (-) electrode heating plates 2 and 3 are short-circuited with each other, Will not flow.

When the pump 28 is operated after the valve 27 is opened while the current supply device 29 is operated as described above, the waste water stored in the waste water storage tank 12 is discharged through the waste water circulation pipe 13. The first heat exchange means 9 is introduced into the upper side, and the introduced waste water is slowly moved by the discharge guide plate 14 arranged in multiple stages and the discharge passage 14a formed in a zigzag shape. 9) the wastewater circulated to the upper part of the second heat exchange means through the connecting pipe 16a connecting the lower part and the upper part of the second heat exchange means, and the second heat exchange means is again brought to the top of the third heat exchange means. The waste water is circulated and supplied to the waste water supply pipe 5 connected to the lower portion of the third heat exchange means, and the (+) (-) electrode heating plate 2 (3) installed stepwise inside the heating evaporation means 1 is provided. At the top of the The (+) electrode heating plate (2) and the (-) electrode heating plate (3) are relatively narrowly spaced, and the (+) electrode heating plate (2) and (- The electrode heating plate 3 is in a grounded state, and the energized state is further ensured by the control step 4 protruding on the tip side of the negative electrode heating plate 3. Therefore, the current is applied to the (+) (-) electrode heating plate (2) and (3) to generate heat. The material of the (+) (-) electrode heating plate (2) and (3) is carbon or nickel having excellent heat generating effect. Alternatively, since it is made of chromium-based alloy, the exothermic action is performed within a short time and at the same time the exothermic temperature is maintained, and the waste water flowing slowly down the (+) (-) electrode heating plate (2) (3) is heated while the water vapor The foreign matter is sludgeized and moved to the bottom.

As described above, when the vacuum pump 32 of the decompression means 18 is operated during the process of heating the wastewater in the heating evaporation means 1 to evaporate the moisture and move the sludge underneath, Since the inside of the heating evaporation means (1) has a pressure drop, the boiling point of the waste water is lowered, and the waste water boils even at a low temperature, thereby improving the heating effect of the (+) (-) electrode heating plate (2) (3). From the top (+) electrode heating plate (2) to the bottom (-) electrode heating plate (3), the water in the waste water is almost evaporated, and the foreign matter is sludged down and discharged to the sludge discharge pipe (7). The effect of being collected and stored in the collection tank 33 can be obtained.

As described above, the water vapor heated and evaporated by the heating evaporation means 1 is introduced into the connection passage 17d through the vapor discharge pipe 6 and moved upward through the heat exchange tube 11 of the third heat exchange means 9. In this case, the heat exchanger pipes 11 of the second and first heat exchange means 9, in which the blower 31 of the decompression means 18 communicates with the connection passage 17a as well as the forced passages, suck the water vapor. The water vapor evaporated from the heating evaporation means 1 by the induction is smoothly discharged to the steam discharge pipe 6, and in this case, the water vapor flows into each heat exchange means 9 and is discharged by the discharge guide plate 14. Water vapor passing through each heat exchange tube 11 is condensed by contact with the heat exchange tube due to the cooling action by the waste water which is delayed in discharge, and as the condensation continues, the condensed droplets gradually increase. Flow down to be stored in the condensate tank 21.

That is, the condensed water condensed in the heat exchange pipe 11 of the third heat exchange means 9 flows into the condensed water storage tank 21 through the condensed water discharge pipe 20a while being collected in the connecting passage 17d, The water vapor passing through the heat exchange tube 11 passes through the heat exchange tube 11 of the second heat exchange means 9 from the top to the bottom through the connecting passage 17c on the upper side. After passing through the second heat exchange means, the water vapor passes through the heat exchange pipe 11 of the first heat exchange means 9 through the lower connection passage 17b, and some of the water condenses and falls down. Entering the decompression means 18 through the connecting passage (17a) of the condensate, which is condensed in the heat exchange tube 11 of the second and first heat exchange means and flows down to the condensate formed in the connecting passage (17b) Soon as it collected in the home space 19 at the same time take the condensate discharge pipe (20b) will be stored in a condensate storage tank 21.

As described above, the water vapor passing through the heat exchange tube 11 of the third heat exchange means 9 in the reverse order is well condensed by the cooling devices 16a and 16b. That is, since the cooling pipes 16a and 16b are installed in the connecting pipes 15a and 15b connecting the first and second, second and third heat exchange means, the wastewater moving from the first heat exchange means to the third heat exchange means. By moving while cooling, each of the heat exchange tubes 11 promotes condensation of water vapor, and the wastewater that has passed through the heat exchange tubes of the third heat exchange means is preheated to some extent in the process of condensing water vapor. In (1), the effect of heating and evaporating well is obtained.

Meanwhile, a small amount of water vapor introduced into the decompression means 18 through the connection passage 17a is condensed and liquefied in the decompression means, and is stored in the condensate storage tank 21 through the condensate discharge pipe 20c.

In the present invention, the (+) (-) electrode heating tube is alternately installed inside the heating evaporation means and installed in a step shape, and the wastewater is slowly flowed from the upper side to connect the (+) (-) electrode heating plate. In order to evaporate the waste water by applying a current to the heating plate, the positive and negative electrodes are heated to evaporate the heating evaporation means and each heat exchange means under reduced pressure by operating the vacuum pump of the pressure reducing means. In the process, the boiling point of the waste water is lowered, so that all the water is heated and evaporated while the waste water flowing down the stairs (+) (-) electrode heating plate leaves the electrode heating plate at the lowermost stage. The vaporized water vapor is gradually condensed and condensed in the course of passing through each of the heat exchange means under reduced pressure and the decompression means in turn. According to the present invention, it is possible to reliably classify and separate the water and foreign matters according to the present invention, so that there is a special effect of more perfecting the wastewater purification as well as the purification of the wastewater. Since the wastewater can be discharged and collected by separating the treated water and the sludge, it is an invention that has a special effect such as enhancing the advantages of the subsequent treatment after the wastewater purification treatment.

Claims (3)

A configuration of a heating evaporation means in which a plurality of (+) (-) electrode heating plates that generate current by being applied by the flowing action of the waste water are alternately installed in a stepped manner; Several heat exchange means for receiving waste water and supplying waste water to the heating evaporation means are connected to the connecting pipe so that the waste water can move sequentially, and the inside of the heat exchange means is sealed by upper and lower support plates, and a plurality of discharge guide plates are provided. Constitution of a heat exchange means having a plurality of heat exchanger pipes arranged in a zigzag shape and having a connection configuration with a steam discharge pipe of the heating evaporation means and a connection passage at upper and lower sides so that water vapor moves as opposed to movement of waste water. and; A blower that promotes the movement of water vapor evaporated from the heating evaporation means to each heat exchange means, and a vacuum pump that reduces the internal pressure of the heating evaporation means and each heat exchanger. And a decompression means for smoothly advancing the condensation of water vapor. The water of the wastewater is evaporated and then liquefied by condensation to be sent to the condensate storage tank, and the foreign matter contained in the wastewater is sludged and discharged separately. Evaporative pressure-type wastewater treatment apparatus using an electrode heating plate, characterized in that the purification treatment to be separated into foreign matter. The method of claim 1, wherein the heating evaporation means is provided with a plurality of (+) (-) electrode heating plates alternately installed in a stepped manner, while delaying the flow of waste water flowing down the (+) (-) electrode heating plate ( Pressure evaporative wastewater using an electrode heating plate, characterized in that a control step is formed at the tip of the (+) or (-) electrode heating plates to connect the current to be conducted by the wastewater flowing through the +) and (-) electrode heating plates. Processing unit. According to claim 1, wherein the heat exchange means for supplying the waste water to the heating evaporation means is a configuration in which a plurality of heat exchange tubes are supported by the upper, lower support plate and the discharge guide plate as the waste water is moved through the outer space of the heat exchange tubes It is supplied to the heating evaporation means, and the water vapor is condensed while moving through the heat exchange tube to be discharged to the condensate discharge pipe, the waste water and the water vapor is reduced pressure evaporation type wastewater using an electrode heating plate, characterized in that configured to move oppositely Processing unit.