KR200262830Y1 - System for treating waste water - Google Patents

Abstract

The present invention can be carried out together with the wastewater treatment process for heating the wastewater and the deodorization process for removing the odor component contained in the steam generated when the wastewater is heated, and the high temperature steam generated by the heating of the wastewater is supplied. The present invention relates to a water treatment system that can be used to preheat the wastewater that is continuously introduced, thereby saving energy, and the present invention provides a separate combustion chamber in the internal space to heat the wastewater in the internal space, and An evaporation tank in which secondary heating is made; A cyclone connected to the evaporator to separate liquid components contained in the introduced steam and reflow into the evaporator; Heat between the steam entering from the cyclone and the hot steam exiting the combustion chamber, including a heat radiation line connected between the cyclone and the combustion chamber in the evaporator, one end of which is connected to the discharge end of the combustion chamber and an endothermic line connected to the cyclone and the inlet of the combustion chamber. A heat exchanger in which the exchange takes place; And heat exchange between the hot steam discharged from the heat dissipation line and the externally supplied waste water by being connected to the other end of the heat dissipation line of the heat exchanger, thereby condensing the hot steam and supplying the heated waste water to the internal space of the evaporator. It includes a condenser.

Description

System for treating waste water

The present invention relates to a water treatment apparatus, and more particularly, to a water treatment system capable of treating wastewater with drinkable water by using high temperature steam generated by heating wastewater to preheat the incoming wastewater and condensing the steam directly after heating.

In the process of treating wastewater, such as leachate generated from garbage and livestock wastewater discharged from the barn, the process of removing the odor component contained in the wastewater after the wastewater treatment process is performed separately. Direct combustion method and catalytic oxidation method are used as the deodorizing method to remove odor components. However, the direct combustion method has excellent deodorizing effect and can remove a wide range of odor components such as flammable odor components, hydrogen sulfide and ammonia, and so on. It has the advantage of being applied overall.

The direct combustion method is a method of oxidizing and decomposing a gas (or steam) containing an odor component under high temperature (600 to 800 ° C) to carbon dioxide and water (steam). Depending on the composition ratio or content of the malodorous component, the set temperature in the furnace and the residence time of the gas vary, but in general, the gas containing the malodorous component passes through a heating device at 700 to 800 ° C. over 0.5 seconds.

However, the main disadvantages of this direct combustion method are the high fuel consumption and the release of harmful (toxic) gases of nitrogen oxides (NO _X ) and sulfur oxides (SO _X ) or chlorine compounds containing chlorine into the atmosphere. In addition, in the direct combustion method, when the malodorous component is burned unsafely, another compound which is not oxidatively decomposed is formed, which causes other malodors. Another problem is that the deodorization process must be performed separately from the wastewater treatment process, and the wastewater treatment device and the deodorization device must be separately installed and operated.

The present invention can be carried out together with the wastewater treatment process for heating the wastewater and the deodorization process for removing the odor component contained in the steam generated when the wastewater is heated, and the high temperature steam generated by the heating of the wastewater is supplied. It is an object of the present invention to provide a water treatment system that can save energy by using for preheating the waste water continuously introduced.

The present invention for realizing the above object is an evaporation tank configured to heat the waste water in the internal space is configured with a separate combustion chamber in the internal space, the steam in the secondary chamber; A cyclone connected to the evaporator to separate liquid components contained in the introduced steam and reflow into the evaporator; Heat between the steam entering from the cyclone and the hot steam exiting the combustion chamber, including a heat radiation line connected between the cyclone and the combustion chamber in the evaporator, one end of which is connected to the discharge end of the combustion chamber and an endothermic line connected to the cyclone and the inlet of the combustion chamber. A heat exchanger in which the exchange takes place; And heat exchange between the hot steam discharged from the heat dissipation line and the externally supplied waste water by being connected to the other end of the heat dissipation line of the heat exchanger, thereby condensing the hot steam and supplying the heated waste water to the internal space of the evaporator. It includes a condenser.

In the present invention, an overflow tank is provided between the evaporation tank and the cyclone to supply compressed oxygen, and thus the steam flow can be smoothly maintained throughout the entire system by applying pressure to the steam introduced into the overflow tank.

On the other hand, the condenser in which the condensation action of the steam is composed of a pair of two connected to each other to condense the hot steam introduced from the heat exchanger and the heat exchange between the low temperature wastewater and the hot steam introduced from the outside twice.

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

1 is a schematic configuration diagram of a water treatment system according to the present invention.

1 is a schematic configuration diagram showing a water treatment system according to the present invention, the water treatment system according to the present invention is an evaporation tank 10 equipped with a combustion chamber 11, an overflow tank connected to the evaporation tank 10 (overflow) tank 20, the first and second cyclones 30A and 30B sequentially connected to the overflow tank 20, the heat exchanger 40 and the heat exchanger connected to the second cyclone 30B and the evaporator 10 40) and installed condenser 50A, 50B connected to the evaporator 10, respectively. The connection relationship and function of each member will be described as follows. On the other hand, in the following description, the water to be treated, that is, plant wastewater, leachate, livestock wastewater, seawater, river water and the like, is called "wastewater".

In addition, in the figure, the flow of the wastewater is shown by the solid line, the flow of the first heat-treated steam by the dotted line, and the flow of the second heat-treated steam by the dashed-dotted line, respectively.

Evaporation Tank (10)

In the evaporation tank 10, a combustion chamber 11 connected to a burner 12 using fuel of combustion heat generated when incineration of oil, gas, electricity or waste tires is installed, and the evaporation tank 10 will be described later. Waste water supplied from the first condenser 50A is introduced, and the combustion chamber 11 is supplied with a primary heated increase in the heat exchanger 40 which will also be described later. The wastewater introduced into the evaporation tank 10 is heated and vaporized due to the heat generated in the combustion chamber 11, and the steam is introduced into the overflow tank 20 together with the unvaporized liquid component.

Overflow Tank (20)

The overflow tank 20 is connected to the above-mentioned evaporation tank 10 and the 1st cyclone 30A, respectively, and the oxygen of constant pressure is supplied in the inside. The steam supplied from the evaporation tank 10 (with a liquid component included) is introduced into the first cyclone 30A by the supplied pressurized oxygen.

First and second cyclones 30A, 30B

The first and second cyclones 30A and 30B are sequentially connected to the overflow tank 20, and the vapor flowing by the high pressure oxygen gas (untreated state, in which the liquid component is included) is removed. It will pass sequentially through the first and second cyclones 30A and 30B. As the steam passes through the first and second cyclones 30A and 30B, the liquid component present with the steam is condensed, and the condensate is returned to the space inside the evaporator 10 through the overflow tank 20. Inflow.

Heat exchanger (40)

The heat exchanger 40 which performs heat exchange with respect to the steam discharged | emitted from the 2nd cyclone 30B between the 2nd cyclone 30B and the evaporation tank 10 is provided. That is, the heat exchanger 40 is provided with an endothermic line 41 through which the steam discharged from the second cyclone 30B flows, and a heat dissipation line 42 through which the hot steam discharged from the combustion chamber 11 flows. have. The endothermic line 41 has one end connected to the second cyclone 30B, the other end connected to the heating line 11A in the combustion chamber 11, and one end of the heat dissipation line 42 connected to the combustion chamber 11. Another end is connected to the first condenser 50A, which will be described later, on the heating line 11A.

First and Second Condenser 50A and 50B

Among the first and second condensers 50A and 50B connected in series, one end of the flow line 50A-1 installed in the first condenser 50A is the discharge end of the heat exchanger 40 heat dissipation line 42 described above. Another end is connected to one end of the flow line 50B-1 installed in the second condenser 50B. Meanwhile, wastewater (sewage, wastewater, seawater, etc.) to be treated is introduced into the inner space of the second condenser 50B, and the wastewater then flows into the evaporator 10 through the first condenser 50A. do.

Hereinafter, the wastewater treatment and deodorization process using the present invention will be described according to the flow of wastewater, and the characteristic functions of each member will be described together.

As described above, the wastewater introduced into the second condenser 50B through the pump 60 flows into the evaporator 10 through the first condenser 50A. By operation of the burner 12, the temperature in the evaporation tank 10 rises (about 100 degreeC) by the combustion chamber 11 in which the internal temperature becomes high, and waste water is vaporized. The vaporized vapor and liquid components enter the overflow tank 20 and then pass through the first and second cyclones 30A and 30B sequentially with high pressure oxygen.

Here, the reason for supplying the high pressure oxygen to the overflow tank 20 is that the steam discharged from the evaporation tank 10 effectively flows to the evaporation tank 10 through each of the cyclones 30A and 30B and the heat exchanger 40. And to condense the unvaporized liquid component in each flow line.

As the vapor and liquid components pass through the first and second cyclones 30A and 30B, the liquid components condense, and the condensate is reintroduced into the evaporator 10 through the condensate line W and fully vaporized. Only steam enters the endothermic line 41 of the heat exchanger 40. In the course of passing through the endothermic line 41, the steam absorbs the heat released from the heat dissipating line 42 (the reason for heat dissipation will be described later), and the temperature thereof increases (about 400 to 450 ° C). The steam whose temperature has risen is discharged from the heat exchanger 40 and then flows into the heating line 11A installed in the combustion chamber 11 in the evaporator 10, and in the course of passing through the heating line 11A, the steam is removed. The temperature will rise further (about 600 to 700 ° C).

As a result, the temperature of the steam rapidly rises in the course of passing through the endothermic line 41 of the heat exchanger 40 and the heating line 11A of the combustion chamber 11, and thus the volatile organic compound (VOC) contained in the steam. : volatile organic compounds) are completely burned, and as a result, odor and carcinogens are completely eliminated.

The steam heated in the heating line 11A of the combustion chamber 11 flows into the heat radiation line 42 of the heat exchanger 40, and flows through the heat absorption line 41 in the course of passing through the heat radiation line 42. Heat exchange with relatively low temperature steam (steam discharged from the second cyclone 30B) takes place, and thus, as described above, the steam discharged from the second cyclone 30B is heated in the heat exchanger 40 and then the evaporation tank. It flows into the combustion chamber 11 of (10).

The hot steam, which has undergone heat exchange in the heat exchanger 40, passes through the first condenser 50A and the second condenser 50B. In the course of passing through the first condenser 50A and the second condenser 50B, the high temperature steam exchanges heat with the low temperature wastewater introduced into each condenser 50A, 50B by the pump 60 to condense (liquefy). Therefore, water of high temperature (about 40 ° C.) is finally discharged through the second condenser 50B. In the present invention, two condensers 50A and 50B are used to condense the steam, which of course is for more complete condensation of the steam.

On the other hand, waste water whose temperature is increased by heat exchange with high temperature steam flows into the evaporation tank 10 to undergo the above-described process.

Effects of the present invention having the above structure and function are as follows.

1. In the present invention, by supplying compressed air to the overflow tank 20, it is possible to maintain a smooth flow of steam over the whole system,

2. After separating the liquid components using two cyclones 30A and 30B, the efficiency of heat exchange can be improved by introducing only pure steam into the heat exchanger 40.

3. In addition, the vapor in which the liquid component is removed is preheated through heat exchange with the steam discharged from the combustion chamber 11 in a heated state, and then reintroduced into the combustion chamber 11 of the evaporator 10 to set the steam. The consumption of fuel required to rise to the temperature (600-700 ° C.) can be greatly reduced.

4. In addition, since the volatile organic compounds contained in the steam are completely burned by direct combustion in the combustion chamber 11, the water (condensed water) obtained after the condensation process of the steam can be completely purified to a drinking level.

5. Meanwhile, before the wastewater is introduced into the evaporator 10, the low temperature wastewater is passed through the condensers 50A and 50B where the high temperature steam is condensed, and thus, due to the heat exchange between the high temperature steam and the low temperature wastewater. The effect of preheating the wastewater flowing into the evaporation tank 10 can also be obtained.

Claims (3)

In a water treatment system, An evaporation tank configured to have a separate combustion chamber in the internal space to heat the wastewater in the internal space, and to perform secondary heating of steam in the combustion chamber; A cyclone connected to the evaporator to separate liquid components contained in the introduced steam and reflow into the evaporator; In the combustion chamber and the steam introduced from the cyclone is connected between the cyclone and the combustion chamber in the evaporator, one end of the heat radiation line connected to the discharge end of the combustion chamber and the endothermic line connected to the cyclone and the inlet of the combustion chamber A heat exchanger for performing heat exchange between the discharged hot steam; The heat exchanger is connected to the other end of the heat dissipation line of the heat exchanger to exchange heat between the hot steam discharged from the heat dissipation line and the wastewater supplied from the outside, thereby condensing the hot steam, and the heated waste water flows into the evaporator internal space. A water treatment system comprising a condenser for feeding. The water treatment system of claim 1, wherein an overflow tank is provided between the evaporation tank and the cyclone to apply pressure to the introduced steam to smoothly maintain the flow of steam throughout the entire system. The water treatment system as claimed in claim 1, wherein the condenser is formed in a pair of two connected to each other so that the condensing action of the hot steam introduced from the heat exchanger and the heat exchange between the low temperature wastewater and the hot steam introduced from the outside are twice.