KR100820188B1 - Vacuum dissipating apparatus for dehydration and fuelization, and method for dehydration and solid fuel of organic waste water sludge cake using this - Google Patents

Abstract

A method for dehydrating organic sludge and generating fuel from the organic sludge is provided to dehydrate, dry, and burn the organic sludge efficiently, by using waste oil discharged from a vehicle maintenance shop. Waste oil and organic sludge are mixed. The mixed matter of waste oil and organic sludge is fried at a low temperature and a reduced pressure, thereby vaporizing moisture contained in the organic sludge and substituting the waste oil for the moisture. The organic sludge containing the substituted water oil is pulverized. The waste oil is separated from the organic sludge through centrifugation. The separated waste oil is reused for a frying process. The reduced pressure ranges from 646 mHg to 722 mHg.

Description

Vacuum dissipating apparatus for dehydration and fuelization, and method for dehydration and solid fuel of organic waste water sludge cake using this}

1 is a schematic view for explaining a pressure-reducing hot water apparatus according to an embodiment of the present invention.

Figure 2 is a graph showing the water content change of the organic sludge at 180 ℃ under reduced pressure.

3 is a graph showing a change in calorific value of organic sludge according to the time of boiling time for each temperature.

The present invention relates to a desulfurization apparatus for dewatering and fueling organic sludge and a method for dewatering and solidifying organic sludge using the same, and more particularly, to an organic sludge including a decompression device, a temperature controller, a pulverizer, and a centrifuge. The present invention relates to a vacuum dewatering device for dewatering and fueling, and a method for dewatering and solidifying organic sludge using the vacuum dewatering device.

In order to treat organic waste sludge (hereinafter referred to as 'organic sludge') generated in a wastewater treatment plant, the organic sludge is conventionally dried and then incinerated. Heat drying is used to dry organic sludge, which is inefficient due to high energy consumption. In addition, the dried organic sludge thus obtained has a low calorific value of 500 to 2,500 kW / kg, although it varies depending on the water content, so that it is difficult to use as an energy source alone, and auxiliary fuel is required even when incinerated. It is a state.

Accordingly, the present inventors have been devising a method to efficiently remove the high content of water contained in the organic sludge in a fast and timely manner, so that the waste oil is sufficiently infiltrated into the organic sludge instead of the organic sludge to dry during incineration. The present invention has been completed by solving the problem of treatment and disposal of organic sludge through the effect of reducing auxiliary fuel required for the purpose, and by developing an apparatus and a method that can use this as a solid fuel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure-reducing hot water apparatus that can efficiently dehydrate, dry and incinerate organic sludge using waste oil of an automobile maintenance factory that is also discharged as waste.

Still another object of the present invention is to provide a dewatering and solid fuelization method of organic sludge using the vacuum bath.

In order to achieve the above object, the present invention is a decompression device consisting of a decompression bath and a decompression pump connected to one end of the decompression bath, a temperature control device connected to a portion of the decompression bath, connected to one end of the decompression bath and lactation Provided is a depressurization apparatus for dewatering and fueling an organic sludge comprising a pulverizer for crushing a relatively large organic sludge, and a centrifuge connected to the pulverizer and separating the oil-treated organic sludge and waste oil.

In addition, the present invention comprises the steps of: i) mixing the waste oil and organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And iii) filtering the de-oiled waste oil and reusing it in the milking process to provide a method for dehydration and solid fuel of organic sludge.

Hereinafter, the present invention will be described in more detail.

In order to treat organic sludge by incineration, a process of drying about 80% of the moisture contained in the organic sludge is required. For this purpose, a large amount of energy is required. By applying the reduced pressure oil method and using the waste oil generated from the automobile maintenance factory as the heat medium used at this time, the solid fuel containing the high calorific value of the waste oil (dry organic sludge) By converting into waste oil, it is possible to greatly reduce the supplementary fuel cost required for incineration and to solve their disposal and disposal problems by using energy resources. That is, the present invention is to provide a pressure reduction apparatus for dehydration and drying of organic sludge having a high water content of about 80% and an operating technology for the dewatering and solid fueling method of organic sludge using the same.

The present invention is a decompression device consisting of a decompression bath and a decompression pump connected to one end of the decompression bath, a temperature control device connected to a portion of the decompression bath, grinding a relatively large organic sludge connected to one end of the decompression bath and lacquered To provide a depressurization apparatus for dewatering and fueling the organic sludge comprising a crusher, and a centrifugal separator for separating the waste oil and the organic sludge treated with the crusher (see Fig. 1). The vacuum bath apparatus removes about 80% of the water contained in the organic sludge to less than 20% in an efficient and fast time, and instead allows the waste oil to sufficiently penetrate into the organic sludge. In the present invention, the decompression bath is equipped with a decompression pump and a temperature control device capable of sufficient decompression, and a pressure gauge capable of measuring the decompression degree is preferably attached to one end of the decompression bath.

In addition, the present invention comprises the steps of: i) mixing the waste oil and organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And iii) filtering the de-oiled waste oil and reusing it in the milking process to provide a method for dehydration and solid fuel of organic sludge.

In the method for dewatering and solidifying the organic sludge of the present invention, it is preferable that the waste oil is filtered out of the waste oil generated in the automobile maintenance process.

In addition, in the dewatering and solid fuelization method of the organic sludge of the present invention, the reduced pressure is preferably in the range of 646 to 722 mmHg. In addition, the low temperature is preferably in the range of 95 to 180 ° C, more preferably in the range of 120 to 140 ° C. In addition, in the dewatering and solid fuelization method of the organic sludge of the present invention, it is preferable that the time of the milking is 10 minutes to 20 minutes. In addition, the centrifugation is preferably made in the range of 2,000 to 3,000 RPM.

In addition, in the dewatering and solid fuelization method of the organic sludge of the present invention, it is preferable to further include the step of removing inorganic components such as metals from the organic sludge before operating the vacuum bath.

The dewatering and solid fueling method of the organic sludge of the present invention efficiently dehydrates and dries water contained in the organic sludge by applying a depressurization method to a dehydration and drying process which is essential for incineration of organic sludge having a high water content. At the same time, the present invention relates to a method of reducing auxiliary fuel required for the incineration process or using it as a separate fuel by converting it into flammable waste oil instead of water and converting it into a solid material having a high calorie content.

The most important factor in the incineration or fueling of organic sludge is the efficient and economical removal of high content of water around 80% for incineration. To this end, the present invention applies a reduced pressure lactation method. The basic concept in developing this process is the phenomenon that the boiling temperature of water is lowered below 100 ℃ under reduced pressure, and organic sludge is produced by using waste oil generated as waste medium to evaporate water contained in organic sludge as a heat medium. Heat it. At this time, as the water evaporates, the waste oil penetrates into the organic sludge and is replaced with water. In addition, the heat treatment is a so-called synerisis in which a large amount of moisture is separated through the breakdown of the gel structure due to heat of protein components contained in the organic sludge and a part of the organic material is hydrolyzed by heat. The solubilization and liquefaction that occur during the high efficiency dehydration proceeds quickly.

Based on the above basic concept, the present invention is a process for heating the organic sludge having a water content of about 80% obtained through a mechanical dehydration method at a pressure of 646 to 722 mmHg under reduced pressure at a temperature of 95 to 180 ° C. A 30 minute application provides a process for obtaining oil-substituted organic sludge with a water content of 20% or less. The oil-substituted organic sludge obtained at this time has a greater heat content than a simple dry organic sludge using heat treatment because of the oil contained therein, and can be used as a non-corrosive solid fuel having good storage properties and completely killing pathogens.

In order to reduce the degree of decompression in operating the decompression bath, the boiling point of water is lowered. Therefore, water contained in the organic sludge can be evaporated at a high speed. The degree of decompression and the temperature and time were set as the conditions for the milking.

As such, the present invention provides a method for efficiently removing about 80% of the water contained in the organic sludge to 20% or less in an efficient and fast time, and instead allowing the waste oil to sufficiently penetrate into the organic sludge. To this end, the present inventors put the organic sludge in an appropriately depressurized oil bath and heat the waste oil as a heat medium. At this time, as the pressure is increased, the boiling point of water can be greatly reduced, so that it is possible to dehydrate at low temperature. For this purpose, it is necessary to determine an appropriate decompression level, heating temperature and heating time, and centrifugal separation rate for separating oil and sludge, because it causes unnecessary power and waste of time and complicated configuration of the device. The technical content to be presented is to determine the appropriate process operating factors in the application of the reduced pressure frying process to provide a method for dewatering organic sludge and solidifying fuel.

The process technology for operating the reduced pressure oil apparatus of the present invention first removes inorganic components such as unnecessary metals from organic sludge having a water content of about 80%. Then, the waste oil generated in an auto repair shop, etc., was filtered in a depressurized oil bath, mixed with the selected organic sludge, and mixed with 10 to 30 at a temperature of 95 to 180 ° C. under a reduced pressure of 646 to 722 mmHg. By heating for a minute, the water contained in the sludge is dropped to 20% or less, and the organic sludge is replaced with waste oil. Then, the organic sludge lump is pulverized relatively small by a pulverizer and then centrifuged to deoil and the separated waste oil is filtered and reused in a depressurization process, and the obtained solid is incinerated without a separate drying process or auxiliary fuel, or a separate fuel. Use as.

The present inventors measured the degree of dehydration and solid fuelization of the organic sludge discharged from the end-of-end treatment plant in Suncheon-si using the vacuum bath.

The moisture content of organic sludge was about 41% at about 15 minutes after application of the milking method at a temperature of 180 ° C under normal pressure (760 mmHg), and about 23% at 684 mmHg. There was a large difference of 35% and 16%, respectively (see FIG. 2).

In addition, the milking method was performed at the temperature of 180 degreeC, 160 degreeC, and 140 degreeC in normal pressure and reduced pressure (684 mmHg). As a result, at a normal pressure and 180 ° C, when the time of the milking was 15 minutes or more, the organic sludge was carbonized due to the high temperature and volatilization of organic substances in the components constituting the organic sludge showed a tendency to decrease the calorific value. When milking at 140 ° C. under reduced pressure, carbonization does not occur even when milking for 20 minutes or more, and the amount of heat is increased as the amount of dehydration increases due to the increase in the time of milking (see FIG. 3). .

Hereinafter, the present invention will be described in detail by way of examples.

However, the following examples are merely to illustrate the invention is not limited to the contents of the present invention.

Example 1 Manufacture of Pressure Reducing Melting Apparatus

The present inventors pulverize a relatively large organic sludge, which is connected to one end of the decompression bath and a temperature control device consisting of a decompression bath and a decompression pump connected to one end of the decompression bath, a temperature controller connected to a part of the decompression bath. A depressurization apparatus for dewatering and fueling an organic sludge, including a pulverizer and a centrifuge separating the waste oil and the organic sludge treated with the pulverizer, was manufactured (FIG. 1).

In the present invention, the depressurization oil apparatus is equipped with a decompression pump and a pressure gauge and a temperature control device capable of sufficient decompression, and the oil used as a heating medium is waste oil generated in an automobile repair shop. The reduced pressure water heater operates automatically according to the set internal pressure, temperature and operating time. When the set operation time elapses, the pressure of the pressure reducing pump stops, and when the pressure is released, the organic sludge is removed from the waste oil, pulverized and centrifuged to separate from the oil used in the milk bath. The oil separated from the organic sludge is filtered and used again in the process.

Example 2 Treatment of Organic Sludge Using Pressure Reducing Oil Strainer

The present inventors measured the degree of dehydration and solid fuelization of the organic sludge discharged from the end-of-end treatment plant in Suncheon-si using the vacuum bath. Specifically, as a result of measuring the amount of heat generated after drying the organic sludge discharged from the end-of-season treatment plant of Suncheon-si, it showed about 500 ~ 2,500 ㎉ / ㎏, and the waste oil collected from the auto repair shop was about 7,200 ㎉ / ㎏. Indicated. However, since the water content of the organic sludge is about 80% and a large amount of heat is consumed to dry it, the water contained in the organic sludge is evaporated using the reduced-pressure milking method used in the present invention, and the oil replacement action in which waste oil is soaked is performed.

<2-1> Moisture Content Change of Organic Sludge with Decompression Melting Time

The temperature at which the water boils under reduced pressure is about 100 ° C at normal pressure (760 mmHg), about 98 ° C at 722 mmHg, about 97 ° C at 684 mmHg, and about 95 ° C at 646 mmHg. The moisture content of organic sludge was about 41% at about 15 minutes when the milking method was applied at a temperature of 180 ° C under normal pressure (760 mmHg), while the moisture content was about 23% at 684 mmHg. Showed 35% and 16%, respectively (Fig. 2).

<2-2> Calorific Value of Organic Sludge by Temperature of Bath Time

The milking method was performed at a temperature of 180 ° C., 160 ° C. and 140 ° C. under normal pressure and reduced pressure (684 mmHg). As a result, at a normal pressure and 180 ℃, when the time of the milking is more than 15 minutes, the organic sludge is carbonized due to the low temperature, the organic material in the component volatilized tended to decrease the calorific value.

On the other hand, when milking at 140 ° C. under reduced pressure, dehydration and substitution proceed at a rapid rate, and carbonization does not occur even after 20 minutes of milking. The heat generation tended to increase. Moreover, the calorific value of 6,000 kPa / kg was shown in about 20 minutes of milking time (FIG. 3).

As described above, the treatment of organic sludge by applying the reduced pressure bath method of the present invention efficiently removes about 80% of the moisture contained therein and at the same time, the oil replacement process of allowing high calorie waste oil to soak in the organic sludge instead of moisture. By increasing the thermal energy content of organic sludge by mixing waste oil with dehydration, it is possible to greatly reduce the amount of auxiliary fuel used for incineration and to use it as a separate fuel. The present invention solves the problem of treating the organic sludge discharged as waste and the disposal of waste oil generated in the automobile repair shop in the situation that the disposal and disposal of organic sludge has been banned as a social problem. It is expected that many effects such as waste water reclamation, waste recycling, natural environment preservation and energy saving will be achieved.

As described above, the decompression bath of the present invention efficiently dehydrates about 80% of the water contained in the organic sludge using solid waste oil, such as an automobile maintenance plant, which is also generated as a waste and has a high calorific value. Fueling will solve the problem of disposal and disposal of organic sludge, and will contribute to greatly reducing the cost of incineration through the effect of reducing the auxiliary fuel required for drying and incineration.

Claims (10)

Iii) mixing the waste oil and the organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And Iii) a method for dewatering and solidifying an organic sludge comprising the step of filtering the deoiled waste oil and reusing it in a milking process, The decompression is a method of dehydration and solid fuel of organic sludge, characterized in that the range of 646 to 722 mmHg. Iii) mixing the waste oil and the organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And Iii) a method for dewatering and solidifying an organic sludge comprising the step of filtering the deoiled waste oil and reusing it in a milking process, The low temperature is in the range of 95 to 180 ℃ organic sludge dehydration and solid fuel method. Iii) mixing the waste oil and the organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And Iii) a method for dewatering and solidifying an organic sludge comprising the step of filtering the deoiled waste oil and reusing it in a milking process, Step ii) is a dewatering and solid fuel method of organic sludge, characterized in that made for 10 to 30 minutes. Iii) mixing the waste oil and the organic sludge; Ii) evaporating the mixed waste oil and the organic sludge at reduced pressure and low temperature to evaporate the water contained in the organic sludge and to replace the waste oil with waste oil; Iii) pulverizing the organic sludge substituted with the waste oil and deoiling by centrifugation; And Iii) a method for dewatering and solidifying an organic sludge comprising the step of filtering the deoiled waste oil and reusing it in a milking process, The centrifugation is dewatering and solid fuelization method of organic sludge, characterized in that at 2,000 to 3,000 RPM. delete delete delete delete delete delete

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