KR20110005184A - Apparatus for hydrolysis treatment of organic sludge and, methods of the same - Google Patents

Abstract

PURPOSE: An apparatus for hydrolysis treatment of organic sludge and, a method thereof are provided to improve the treatment efficiency of organic sludge by enabling continuous hydrolysis treatment. CONSTITUTION: A method for hydrolysis treatment of organic sludge comprises the steps of: supplying organic sludge to each arranged decomposition tubs while adjusting the supply amount of organic sludge to a sludge valve; heating the each decomposition tub by supplying steam to each decomposition tub; performing hydrolysis treatment for organic sludge by maintaining the pressure of the decomposition tub at 10-40 pressure of 180-250°C; performing heat exchange to cool the tub for hydrolysis treatment and heat another decomposition tub; and discharging the hydrolysis treated organic sludge from the cooled hydrolysis tub.

Description

Apparatus for hydrolysis treatment of organic sludge and, methods of the same

The present invention relates to an organic sludge hydrolysis apparatus and a method thereof.

In general, sludge is sediment from sewage treatment or water purification. In particular, the sludge generated during sewage treatment is a mixture of organic matter and water, the water content is about 60 ~ 99%. Organic waste treatment generates organic sludge containing organic matter such as household sewage, food waste, manure, agricultural and fishery waste, algae, and livestock wastewater generated from various washing and cleaning operations. Organic sludge decomposes organic matter inside after a certain period of time, causing odors and pests. Therefore, organic sludge is treated by ocean dumping, composting, or the like.

However, organic sludge, which has undergone the usual drying process, has more than 3000 kcal of energy per kg. Therefore, when the energy is recovered from the organic sludge that has been subjected to the usual drying process, the organic sludge that is disposed of in dumping and composting can be reused as a resource, thereby reducing the amount of waste and being used as a useful energy source.

However, organic sludge has a high water content of 80%, which requires a lot of energy in the usual drying process. That is, in order to dry organic sludge having a water content of 80%, more energy is required than organic sludge used as an energy source after drying, and thus energy contained in organic sludge is not economically utilized.

In other words, many technologies have been attempted to recover energy by removing a large amount of water contained in organic sludge or decomposing it into microorganisms.

On the other hand, organic sludge contains carbohydrates and proteins, which are nutrient organics, which are difficult to dissolve in organic polymer sludge because they are insoluble in water in the polymer state and physically combined with water so that water is not easily separated.

Recently, hydrolysis methods have been developed that can decompose nutritive organics into organic sludges by water solubility to separate insoluble solids and aqueous solutions and use them as energy sources. Hydrolysis is a phenomenon in which nutritive organic substances contained in organic sludge are decomposed into water-soluble substances such as glucose or amino acids by being combined with water molecules in the form of steam at a temperature of 180 to 250 ° C.

That is, when organic sludge is heated to high temperature and high pressure, nutrient organic matter is chemically combined with water at 180 ~ 250 ℃ temperature, the polymer ring is broken and hydrolyzed to glucose or amino acid, which is a water-soluble substance, dissolved in water contained in organic sludge to form an aqueous solution. To be separated. In other words, when organic sludge is hydrolyzed at 180 ~ 250 ℃, the nutritional organic matter that binds to water physically and binds to the movement of water is decomposed and changed to water solubility. It flows like water. The hydrolyzed organic sludge can be easily separated into an aqueous solution and a solid, and can be utilized as an energy source.

However, for this hydrolysis, organic sludge should be heated to 180 ~ 250 ℃, and since water turns into steam at 100 ℃ or higher at atmospheric pressure, organic sludge is maintained at 180 ~ 250 ℃ temperature for hydrolysis. Must be kept compressed at a high pressure of 10 to 40 atmospheres.

Conventional organic sludge hydrolysis device is to inject water vapor at a temperature of 180 ~ 250 ℃ into the organic sludge tube to be supplied so that the steam and organic sludges are in contact with each other and heated, and the heated organic sludge is stored in a hydrolysis vessel and hydrolyzed At this time, organic sludge and water vapor, which are poor in fluidity, do not mix well, and the heating temperature is 180 ° C. or less, so that the hydrolysis takes a long time and the decomposition is not performed properly.

According to the experiment, the hydrolysis temperature takes more than 90 minutes for hydrolysis at 180 ° C and the separation of water-soluble substances and solids is not well achieved at 170 ° C, but hydrolysis is completed within 30 minutes at 200 ° C.

In addition, the conventional organic sludge hydrolysis apparatus which hydrolyzes at a temperature of 200 ° C. or higher is configured in a batch manner, and hydrolysis is performed while organic sludge is supplied, and the separated nutrient organic solution and solids are discharged after hydrolysis. After the discharge, the organic sludge is supplied again and hydrolysis is performed. After one step is completed, the organic sludge is hydrolyzed after each step, thereby increasing the hydrolysis time of the organic sludge. The amount of organic sludge decomposed was small, there was a problem that productivity is lowered.

In addition, since the organic sludge hydrolysis device is configured to move organic sludge at high temperature and high pressure, it is difficult to construct a moving device at high temperature and high pressure. The device could not be configured.

SUMMARY OF THE INVENTION An object of the present invention is to provide an organic sludge hydrolysis apparatus and a method which can not only continuously hydrolyze organic sludge but also reduce heat energy by exchanging heat generated during hydrolysis. There is this.

In addition, the organic sludge is heated, hydrolyzed, and cooled at a high temperature and high pressure in a state in which the organic sludge is injected into the vessel or discharged to the outside without being discharged into the vessel. It is to provide an organic sludge hydrolysis device and a method easily formed in the.

The organic sludge hydrolysis apparatus according to an embodiment of the present invention is arranged in a plurality of sludge supply apparatus for supplying organic sludge, one side of the sludge supply apparatus, each connected to the sludge supply apparatus is supplied with sludge inside A decomposition tank having a decomposition space, disposed on one side of the decomposition tank, each connected to a plurality of the decomposition tanks to supply steam to the decomposition space, and a plurality of the decomposition tanks, respectively; A heat exchange tube communicating with the heat dissipation space so as to be heat-exchanged, and disposed at one side of the plurality of disassembly tanks, and an exchange valve connected to the heat exchange tube to open and close to selectively connect the plurality of disintegration spaces, and one side of the disassembly tank And organic sludge hydrolyzed in the digestion tank And a discharge pipe connecting the discharge body to be leaded, a plurality of the decomposition tanks and the discharge body, and discharging the discharge body of the hydrolyzed organic sludge discharged from each of the decomposition tanks, wherein the sludge supply device and the steam are discharged. The supply apparatus may supply the organic sludge and the steam to be selectively controlled according to the internal temperatures of the plurality of decomposition tanks, and the organic sludge supplied from the sludge supply apparatus is partially supplied to the decomposition space to supply the sludge. It is possible to divide the space supplied with the sludge and the space supplied with steam, wherein the heat exchange tube selectively connects the plurality of disassembly tanks arranged by the operation of the exchange valve, and the same temperature and pressure are reduced by mutual heat exchange. The decomposition spaces may be communicated with each other.

The apparatus may further include a temperature sensor disposed at one side of the decomposition tank and configured to sense a temperature of each of the decomposition spaces arranged in plural.

The sludge supply apparatus is configured to connect the sludge supply body in which the organic sludge is stored, the sludge supply body and the plurality of decomposition tanks, respectively, and to supply the organic sludge to the decomposition tank. A sludge supply pipe connected to the sludge supply body, one side of the sludge supply body, a pressurized pump connected to the sludge supply pipe to provide a pressing force for supplying the sludge, and a plurality of digestion tanks, respectively. And a sludge valve connected to a supply pipe to open and close the sludge supply pipe to supply the organic sludge to the plurality of decomposition tanks. The sludge supply pipe is accommodated in the sludge supply body and is supplied through the sludge supply pipe by a pressing force of the pressure pump. The organic sludge By operation of the sludge valve group it can be selectively supplied to the plurality of the decomposition tank is connected to the sludge feed pipe.

The apparatus may further include a stirring device disposed inside the decomposition tank to stir the organic sludge and the steam supplied to the decomposition space.

In addition, the stirring device is disposed inside the disassembly body, the stirring body is supported to be rotated in the interior of the decomposition space, is disposed outside one side of the decomposition tank, and inserted into the decomposition space direction A rotation motor rotated by an operation, and a power transmission device disposed in the disassembly tank, and connected to the stirring body and the rotary motor so as to rotate together, wherein the stirring body is the center of the decomposition space. Located in the organic sludge is supplied to the space and the steam is supplied by the rotation of the rotary motor in the space supplied with the agitation and the organic sludge and the steam can be stirred, the stirring body is in the space supplied with the steam Part of the organic material in a heated state in the steam supply The stirrer and the steam may be stirred, and the rotary motor may be connected to the stirring body located at the center and the power transmission device to rotate the stirring body so as to be inserted into the space where the steam is supplied to the decomposition space. Can be.

In addition, the steam supply device is disposed on one side of the cracking tank, and is connected to each of the steam generating body, the steam generating body and the plurality of cracking tanks to generate steam by heating water, in the steam generating body A steam supply pipe connected to supply the generated steam to each of the plurality of cracking tanks, and one side of the plurality of cracking tanks, respectively, and connected to the steam supply pipe to supply the steam to the plurality of cracking tanks, respectively. It may include a steam valve that is opened and closed to adjust the supply amount, the steam valve may selectively supply the steam in accordance with the temperature of the plurality of decomposition tanks.

In addition, each of the plurality of decomposition tanks is disposed on one side, it may be further provided with a discharge valve connected to the discharge pipe is opened and closed to control the discharge of the hydrolyzed organic sludge discharged from the decomposition tank.

In addition, surrounding the outer periphery of the sludge supply pipe, having a heat exchange space into which the sludge supply pipe is inserted, may further include a heat exchange body connected to the discharge pipe in the upper and lower, respectively, the heat exchange body is the discharge pipe The organic sludge supplied from the sludge supply pipe may be heated in a state in which latent heat of the hydrolyzed organic sludge discharged through the sludge is supplied.

In addition, the organic sludge hydrolysis method according to an embodiment of the present invention is the organic sludge as a sludge valve in each of the digestion tank arranged in a plurality of pressurized pressure of the pressure pump through the sludge supply pipe connected to one side of the sludge supply body containing the organic sludge. Supplying organic sludge while controlling the supply amount, step by step by supplying steam through the operation of the steam valve to each digester connected to the steam generating body and the steam supply pipe while sensing the temperature from the temperature sensor inside each of the plurality of digester arranged Heating each cracking tank with a temperature difference, and supplying steam to a cracking tank having the highest temperature among the plurality of cracking tanks so as to have a hydrolysis temperature of 10 to 40 atm of 180 to 250 ° C. Hydrolysing, temperature difference between steam used for heating after hydrolysis Accordingly, when the mutually selectively communicating with each other through the heat exchange tube by the operation of the exchange valve to the different heating tanks heated in stages, the heating tank of the hydrolysis tank is hydrolyzed and the cold tanks of each other decomposition tank are exchanged step by step to cool down. Heat-dissipating the other digestion tank to be heated; discharging the hydrolyzed organic sludge to the discharge body through the operation of the discharge valve through the discharge pipe connected to the digestion tank cooled by the heat exchange; and supplying the organic sludge to the discharged digestion tank. Hydrogen decomposes organic sludge in the other heat exchanger by supplying steam to the highest temperature decomposition tank heated by heat exchange to the 10-40 atmosphere of 180 ~ 250 ℃ hydrolysis temperature. After digestion, heat the individual digesters connected in parallel. Embodiment a ring, and after cooling by heat exchange is subjected to a step of discharging through a chulgwan times continuously for each decomposition tank includes the step of circulating the process.

In addition, in the step of supplying the organic sludge, a supply amount is controlled by each of the sludge valves disposed in each of the plurality of digestion tanks arranged in a plurality so as to partially supply the inside of the digestion tank to form a space in which steam is supplied into the digestion tank. Can be.

In addition, in the hydrolysis step, a stirring device is installed inside the decomposition tank, and the sludge and steam supplied by the operation of the stirring device may be stirred together to hydrolyze.

In addition, in the step of discharging the organic sludge, the heat exchange body surrounding the outer surface of the sludge supply pipe is connected to one side of the discharge pipe, so that when the hydrolyzed organic sludge is supplied through the discharge pipe, the organic material is supplied to the sludge supply pipe while passing through the heat exchange body. The sludge may be heated to reuse the latent heat remaining during hydrolysis.

According to an embodiment of the present invention, a plurality of decomposition tanks for hydrolyzing organic matter are connected in parallel so that steam having the pressure and temperature of hydrolysis remaining after hydrolysis of the organic sludge is cooled while heating another decomposition tank connected in parallel. As the heat exchange takes place, the thermal efficiency is increased, and no cooling device is required, thereby reducing the size of the device.

In addition, the plurality of cracking tanks connected in parallel are connected to the steam supply unit with organic sludge stored therein to supply steam to the cracking tanks so that the temperature and pressure are different from each other. As the organic sludge is hydrolyzed sequentially according to the pressure difference, the organic sludge is continuously hydrolyzed in each decomposition tank without moving, so that the hydrolysis is continuously performed, thereby providing an effect of improving the treatment efficiency of the organic sludge.

Further, the cracking tank continuously hydrolyzed is supplied with steam having a pressure and a temperature that is hydrolyzed while the sludge is supplied inward, and is hydrolyzed. By being discharged in a cooled state by heat exchange, the hydrolyzed organic sludge is discharged in a cooled state, and thus the organic sludge is not moved under high pressure, so the device can be easily configured and the injection and discharge efficiency is increased. To provide.

In addition, an organic sludge space and a steam in which the organic sludge is agitated are installed inside the decomposition tank, and a stirring device heated by supplying the steam to the organic sludge and steam increases the hydrolysis efficiency. To be effective.

In addition, the organic sludge is supplied to fill a portion of the space where the organic sludge is hydrolyzed so as to be divided into a space in which the steam is supplied and a space containing the organic sludge. The pressure cracking tank and the low temperature and pressure cracking tank are interconnected, so that the pressure is exchanged between the cracking tanks so that the steam moves and the heat exchanger is heated and cooled by the stirring of the stirring device, thereby improving the efficiency of heat exchange. .

In addition, a heat exchange vessel through which the separated solids discharged after hydrolysis and a nutrient solution are passed is installed on the organic sludge supply side of the decomposition tank connected in parallel, and a pipe is supplied to the organic sludge supplied in the center of the heat exchange vessel. Later, the latent heat of the heated solid and nutrient solution may be recovered by contacting the organic sludge, thereby providing an effect of increasing thermal efficiency as the supplied organic sludge is primarily heated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated by like reference numerals throughout the specification.

Looking at the thermal properties of water associated with the hydrolysis device of organic sludge, the temperature-pressure curve in which water changes from liquid to gas is called the vapor pressure curve of water. If the external pressure is higher than the vapor pressure curve at a certain temperature, water is a liquid. Low external pressures exist as gases. The pressure and temperature relationships in the vapor pressure curve of water are shown in Table 1.

Temperature
(℃) pressure
(atmospheric pressure) Temperature
(℃) pressure
(atmospheric pressure) Temperature
(℃) pressure
(atmospheric pressure) Temperature
(℃) pressure
(atmospheric pressure) 100 1.0 140 3.6 180 10.0 220 23.3 110 1.4 150 4.7 190 12.6 230 28.2 120 2.0 160 6.2 200 15.6 240 33.8 130 2.7 170 7.9 210 19.2 250 40.1

Therefore, at 180 ~ 250 ℃, the temperature at which organic sludge is hydrolyzed, since the pressure shows a high pressure of 10 to 40 atm and high steam pressure, nutrient organic matter in organic sludge can be hydrolyzed only when the pressure is maintained higher than this.

In addition, water absorbs 540 kW / kg at 100 ° C and 1 atm when the state changes to water vapor, and the volume expands by about 1700 times. . The rate of heat energy transfer due to the gas and liquid state changes in the heat pipe is faster than that of copper, which has the best thermal conductivity. By using the water property, the heating method and the heat exchange method necessary for hydrolysis of organic sludge can be used. A decomposition device was developed.

Then, the organic sludge hydrolysis apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 is a perspective view showing an organic sludge hydrolysis apparatus according to an embodiment of the present invention, Figure 2 is a block diagram showing an organic sludge hydrolysis apparatus of Figure 1, Figure 3 is a view of the organic sludge hydrolysis apparatus of Figure 1 It is a use state diagram which shows a use state, and FIG. 4 is a side cross-sectional view which shows the hydrolysis part and stirring apparatus which are main components of the organic substance sludge hydrolysis apparatus of FIG.

1 to 4, the organic sludge hydrolysis apparatus 100 according to an embodiment of the present invention is a sludge supply apparatus 110, a steam supply apparatus 120, a hydrolysis unit 130, and a discharge unit. 140.

The sludge supply apparatus 110 includes a sludge supply body 111 in which the organic sludge 1 is accommodated, a sludge supply pipe 112, a pressure pump 113, and a sludge valve 114. The sludge supply body 111 contains organic sludge 1 such as sewage sludge, food waste, and livestock wastewater generated during sewage treatment.

Sludge supply pipe 112 is one side is connected to the sludge supply body 111, the other side is connected to the hydrolysis unit 130. The sludge supply pipe 112 is connected to allow the organic sludge 1 accommodated in the sludge supply body 111 to be supplied to the hydrolysis unit 130. The sludge supply pipe 112 may be branched so that the organic sludge 1 may be supplied to each hydrolysis unit 130 when a plurality of hydrolysis units 130 are installed.

The pressure pump 113 is disposed on one side of the sludge supply body 111 and is connected to the sludge supply pipe 112. The pressure pump 113 is difficult to move because the organic matter is mixed with the sludge, and the organic matter increases the water content and viscosity of the sludge. It provides a pressure supplied to the organic sludge 1, which is difficult to move due to high moisture content and viscosity. That is, the organic sludge 1 accommodated in the sludge supply body 111 is supplied to the hydrolysis unit 130 through the sludge supply pipe 112 at the pressing force of the pressure pump 113.

The sludge valve 114 is disposed between the sludge supply body 111 and the hydrolysis part 130 and is connected to the sludge supply pipe 112. The sludge valve 114 opens and closes the sludge supply pipe 112 so that the supply amount of the organic sludge 1 supplied by the pressing force of the pressure pump 113 can be adjusted. The sludge valve 114 may be installed according to the branched position of the sludge supply pipe 112 connected to each hydrolysis unit 130 when a plurality of hydrolysis units 130 are installed.

In the present specification, the first sludge valve (eg, the sludge valve 114 for adjusting the supply amount of the organic sludge 1 to be distributed and supplied by setting the quantity of the hydrolysis unit 130 which may be arranged in plural to four is installed). 114a), the second sludge valve 114b, the third sludge valve 114c, and the fourth sludge valve 114d. This is for convenience of description. The sludge valve 114 is determined according to the number of hydrolysis units 130 that can be installed in plurality. That is, the hydrolysis unit 130 may be installed in plural or two or more, and the sludge valve 114 may be installed in two or more according to the quantity of the hydrolysis unit 130. In other words, the quantity of the sludge valve 114 may be determined according to the quantity of the hydrolysis unit 130, and it is apparent to those skilled in the art that the number of sludge valves 114 is not limited to four.

The steam supply device 120 includes a steam generating body 121, a steam supply pipe 122, and a steam valve 123 in which steam is generated by heating water. The steam generating body 121 is disposed at one side of the hydrolysis part 130 and steam is generated by heating the supplied water. Water is vaporized when heated to 100 ° C or higher, and pressure increases as the temperature increases. The steam generating body 121 heats water to generate steam. The vapor increases in pressure as the temperature of the water vaporizes. In other words, when the water is heated to a high temperature, the pressure of the steam also increases as the temperature increases.

In addition, since the pressure-increasing steam can be moved by the pressure difference with other devices of low pressure, the device is reduced because the moving is performed only by opening and closing the valve without the need for any other moving device. In addition, when the vapor moved due to the pressure difference contacts the organic sludge at low temperature, the volume decreases while condensing, and the pressure decreases. As the organic sludge 1 is heated by the heat of condensation, the heating efficiency increases.

The steam supply pipe 122 connects the steam generating body 121 and the hydrolysis part 130, and is connected to supply steam generated in the steam generating body 121 to the hydrolysis part 130. The steam generated in the steam generating body 121 is supplied to the hydrolysis unit 130 through the steam supply pipe 122. The steam supply pipe 122 may be branched so that steam may be supplied to each hydrolysis unit 130 when a plurality of hydrolysis units 130 are installed.

The steam valve 123 is disposed between the steam generating body 121 and the hydrolysis part 130 and is connected to the steam supply pipe 122. The steam valve 123 opens and closes the steam supply pipe 122 to adjust the supply amount of the steam supplied to the hydrolysis unit 130. When the plurality of hydrolysis units 130 are installed, the steam valve 123 may be installed at branched positions of the steam supply pipes 122 to which each hydrolysis unit 130 is connected.

In the present specification, the first steam valve 123a and the first steam valve 123 are installed to set the quantity of the hydrolysis unit 130, which may be arranged in plural, to be set to four, respectively, so that the steam valve 123 for controlling the supply amount of the steam supplied is distributed. The second steam valve 123b, the third steam valve 123c, and the fourth steam valve 123d are included. This is for convenience of description. The steam valve 123 is determined according to the number of hydrolysis units 130 that can be installed in plurality. That is, the hydrolysis unit 130 may be installed in plural, two or more, and the steam valve may be installed in two or more according to the number of hydrolysis. In other words, the quantity of the steam valve 123 may be determined according to the quantity of the hydrolysis part 130, and it is apparent to those skilled in the art that the number of steam valves 123 is not limited to four.

The hydrolysis unit 130 is a decomposition tank 131, the heat exchange tube 133, the exchange valve 134, the temperature sensor 135, and the stirring device 136, which is supplied with organic sludge 1 and steam is hydrolyzed. It includes. The sludge tank 131 is connected to the sludge supply body 111 and the steam generating body 121, respectively, are arranged in parallel in plurality. Inside the cracking tank 131, the organic sludge 1 and steam are supplied with a cracking space 132 to hydrolyze. One side of the digestion tank 131 is connected to the sludge supply pipe 112 is in communication with the decomposition space 132 so that the organic sludge 1, the supply amount is controlled by the sludge valve 114 is connected. The other side of the decomposition tank 131 is connected to the steam supply pipe 122 is in communication with the decomposition space 132 so that the steam is controlled to supply the steam valve 123. The organic sludge 1 is partially supplied to the decomposition space 132 through the sludge supply pipe 112 and is supplied while the supply amount of the organic sludge 1 is controlled to supply steam to the remaining part. That is, the organic sludge 1 is supplied to the decomposition space 132 so that only about half of the organic sludge 1 is filled, and the space in which the organic sludge 1 is filled and the space supplied with steam are divided.

When the decomposition space 132 is divided into a vapor space and a sludge space, the vapor space has good compressibility so that the pressure can be easily changed by supplying or discharging steam, and when supplying or discharging steam at a high pressure through the vapor space, The pressure in the space is controlled to facilitate the steam mixing heating of the sludge or the cooling of the steam release.

In this specification, four disassembly tanks 131 arrange | positioned in multiple numbers so that it may become a parallel form are arrange | positioned. That is, the decomposition tank 131 is provided with the 1st decomposition tank 131a, the 2nd decomposition tank 131b, the 3rd decomposition tank 131c, and the 4th decomposition tank 131d, respectively. This is for convenience of description. That is, the decomposition tank 131 may be arranged in a plurality of parallel form may be provided with two or more. In other words, it is apparent to those skilled in the art that the decomposition tank 131 is not limited to four.

The first to fourth decomposition tanks 131a, 131b, 131c, and 131d are connected to sludge supply pipes 112 branched to be connected to the sludge supply body 111, respectively. Sludge valves 114 are provided at portions branched to the sludge supply pipes 112, respectively. That is, the first sludge valve 114a is installed on the side to which the first disassembling tank 131a is connected, and the second sludge valve 114b is installed on the side to which the second disassembling tank 131b is connected, and the third disassembling tank is installed. The third sludge valve 114c is provided on the side to which 131c is connected, and the fourth sludge valve 114d is provided on the side to which the fourth decomposition tank 131d is connected. Therefore, the organic sludge 1 supplied from the sludge supply pipe 112 has the first to fourth digestion tanks 131a, 131b, and 131c adjusting the supply amount from the first to fourth sludge valves 114a, 114b, 114c, and 114d. , 131d) may be supplied with the organic sludge (1). By the operation of the sludge valve 114, a space in which the organic sludge 1 is supplied and a space in which steam is supplied are divided into the decomposition spaces 132 of the first to fourth decomposition tanks 131a, 131b, 131c, and 131d. It supplies while adjusting the supply amount of the organic sludge 1 so that it may become.

In addition, the first to fourth decomposition tanks 131d are connected to steam supply pipes 122 branched to be connected to the steam generating body 121. Steam valves 123 are respectively provided at portions branched to the steam supply pipe 122. That is, the first steam valve 123a is installed at the side to which the first decomposition tank 131a is connected, and the second steam valve 123b is installed at the side to which the second decomposition tank 131b is connected to the third decomposition tank. The third steam valve 123c is installed on the side where the 131c is connected, and the fourth steam valve 123d is installed on the side where the fourth decomposition tank 131d is connected. Therefore, the steam supplied from the steam supply pipe 122 is controlled by the first to fourth steam valves 123a, 123b, 123c, and 123d, respectively, and the first to fourth decomposition tanks 131a, 131b, 131c, and 131d, respectively. Steam can be supplied. By operating the steam valve 123, steam is supplied to the organic sludge 1 supplied to the interior of each decomposition space 132 of the first to fourth decomposition tanks 131a, 131b, 131c, and 131d to form organic sludge 1. ) Can be heated. In addition, the steam is supplied at a temperature and a pressure at which the organic sludge 1 is hydrolyzed inside the decomposition tank 131 selected from among the plurality of decomposition tanks 131 arranged by the operation of the user's steam valve 123. Decomposition may proceed.

As described above, the first to fourth decomposition tanks 131a, 131b, 131c, and 131d are connected to the sludge supply pipe 112 and the steam supply pipe 122, respectively, so that the organic sludge (hydrogen sludge) may be hydrolyzed into the decomposition space 132. 1) and steam can be supplied. In addition, the sludge supply pipes 112 connected to the first to fourth digestion tanks 131a, 131b, 131c, and 131d are provided with first to fourth sludge valves 114a, 114b, 114c, and 114d, respectively. The amount of supply of the organic sludge 1 to the tank 131 can be selectively adjusted by the user. In addition, the first to fourth steam valves 123a, 123b, 123c, and 123d are installed in the steam supply pipes 122 connected to the first to fourth decomposition tanks 131a, 131b, 131c, and 131d, respectively. The amount of steam supplied to the tank 131 can be selectively adjusted by the user.

The heat exchange tube 133 connects each decomposition tank 131 arranged in plural, and is connected so that the water vapor space of each decomposition space 132 may communicate with each other. The heat exchanger tube 133 is a steam flow passage connecting the dissociation tanks having different pressures to generate steam in the high pressure disassembling tank and connecting the generated steam to the low pressure disassembling tank. The heat exchange tube 133 is branched and connected so that each decomposition tank 131 arranged in a plurality in parallel form can be connected to each other. That is, the first to fourth decomposition tanks 131a, 131b, 131c, and 131d may be connected to the heat exchange tubes 133 so that the respective decomposition spaces 132 may communicate with each other.

The exchange valve 134 is disposed at one side of each of the plurality of digestion tanks 131 arranged in a plurality, and is connected to the heat exchange tube 133 to open and close the heat exchange tube 133 in communication with the vapor space of each decomposition space 132. It is operated to selectively connect each decomposition tank 131 arranged in plurality. Optionally, the decomposition tank 131 connected to the heat exchange pipe 133 by the operation of the exchange valve 134 is a decomposition tank 131 where the steam generated in the decomposition tank 131 having a high temperature and pressure is low in temperature and pressure. The steam is generated, moved, and condensed so that the temperature and pressure of the decomposition tanks 131 are the same while moving to the condenser. The organic sludge in the decomposition tank is cooled and decomposed at high temperature by the generation, movement, and condensation of steam by changing the pressure of the decomposition tank by opening and closing the heat exchange tube by operating the exchange valve without moving the organic sludge in the decomposition tank. Organic sludge in the bath undergoes a heated heat exchange.

In the present specification, the exchange valve 134 is disposed in each of the first to fourth decomposition tanks 131a, 131b, 131c, and 131d, and is connected to the first decomposition tank 131a to the heat exchange tube 133 to provide a first exchange valve ( The second exchange valve 134b is installed in the heat exchange tube 133 connected to the second decomposition tank 131b and the third exchanger is installed in the heat exchange tube 133 connected to the third decomposition tank 131c. The valve 134c may be installed, and the fourth exchange valve 134d may be installed in the heat exchange tube 133 connected to the fourth decomposition tank 131d. In other words, the steam heated and pressurized after hydrolysis in one decomposition tank 131 among the first to fourth decomposition tanks 131a, 131b, 131c, and 131d is supplied to the first to fourth exchange valves 134a, 134b, and 134c. , 134d may be supplied to another digestion tank 131 connected to the mutual heat exchange tube 133 to be cooled and decompressed. In addition, one heat dissipation tank 131 which is heat exchanged is sequentially connected by operation of another disassembling tank 131 and the exchange valve 134, and is hydrolyzed while being heat-exchanged with each other by the connection of each dissolution tank 131. The bath 131 is cooled and depressurized.

As such, the high temperature and pressure steam remaining in the organic sludge at high temperature and high pressure after the hydrolysis heats up the internal temperature and pressure of the decomposition tanks 131 connected while being heat-exchanged with other decomposition tanks 131. That is, the high temperature and high pressure steam of the decomposition tank 131 hydrolyzed by heat exchange moves to the vapor space inside the other decomposition tank 131 to heat and pressurize the organic sludge of the decomposition tank while the hydrolyzed decomposition tank is cooled and Decompression Therefore, the thermal energy used for hydrolysis may be converted into steam to heat and pressurize other decomposition tanks 131 to improve thermal efficiency.

The temperature sensor 135 is disposed inside the decomposition tank 131, and the temperature of the decomposition space 132 is sensed. The temperature sensor 135 may be installed inside each decomposition tank 131 arranged in plural to sense a temperature of the decomposition space 132. That is, the first to fourth decomposition sensors 131a, 131b, 131c, and 131d are provided with the first to fourth temperature sensors 135a, 135b, 135c, and 135d, respectively, according to respective decomposition tank 131 temperatures. The organic sludge 1 of each decomposition tank 131 may be hydrolyzed by adjusting the supply amount of steam. In addition, the exchange valve 134 may be operated by measuring the respective temperatures at the time of heat exchange of each digestion tank 131 to check the cycle of heat exchange. As mentioned above, temperature is correlated with pressure due to the physical properties of steam. That is, as the temperature of the steam rises, the pressure also rises as shown in Table 1. Therefore, the pressure of the steam can also be measured according to the measured temperature value. In other words, the pressure measured at the installation position of the temperature sensor 135 can also check the state of the decomposition tank 131 in accordance with the correlation between the temperature and the pressure, thereby providing the installation position of the temperature sensor 135. The pressure sensor may be installed at.

 The stirring device 136 is disposed inside the cracking tank 131 and is installed to stir the organic sludge 1 and the steam contained in the cracking space 132. The stirring device 136 may include a stirring body 136a, a stirring motor 136b, and a power transmission device 136c for stirring the organic sludge 1 and steam by rotation. The stirring body 136a is supported to be rotatable in the inner center of the decomposition space 132 and can stir the organic sludge 1 and the steam by the rotation. The stirring body 136a is located in the divided space inward in the decomposition space 132, which is divided into a sludge space in which the organic sludge 1 is accommodated and a steam space in which steam is supplied, and can be stirred by rotation. . In addition, the stirring body 136a may primarily heat the organic sludge 1 by heat transfer by contact when the upper portion is heated between the organic sludge 1 by rotation in a state where the upper part is heated in a space where steam is supplied. Efficiency can be increased. In addition, when heat exchange is performed while the stirring body 136a is rotated inside the cracking tank 131, a high pressure steam flows into the low pressure steam space due to the pressure difference between the cracking tanks 131 being heat-exchanged and the pressure is increased. While the steam temperature of the digestion tank 131 rises and the stirring body 136a is rotated, the organic sludge of high temperature is rapidly contacted with the organic sludge of high temperature by stirring, so that the organic sludge can be rapidly heated by condensation of steam. The heat exchange efficiency can be increased.

Here, the stirring body 136a may be any conventional stirring body capable of stirring the organic sludge 1 and steam.

The stirring motor 136b is disposed at an outer side of the decomposition tank 131 and is inserted into the upper steam space of the decomposition space 132. The stirring motor 136b is inserted in the steam space to which steam in the decomposition space 132 is supplied, and is disposed outside the decomposition tank 131. The rotating part of the stirring motor 136b is inserted into a steam space, which is a space to which steam of the decomposition space 132 is supplied, and a portion on which the rotation is operated is provided outside the decomposition tank 131. The stirring motor 136b may be inserted into a steam space to which steam is supplied to prevent foreign matter from entering the insertion portion. That is, when the stirring motor 136b is inserted into the portion where the organic sludge 1 is in contact, the organic sludge 1 is introduced into the insertion portion of the stirring motor 136b to generate rotational interference of the stirring motor 136b. The organic sludge 1 may be discharged to the outside. Therefore, the rotating portion of the stirring motor 136b can be inserted into the steam space to which steam is supplied to prevent rotational interference and sludge discharge.

Here, the insertion portion of the stirring motor 136b inserted into the steam space to which steam is supplied is formed in a sealed structure so that steam is not discharged to the outside. That is, a hermetically sealed body may be installed at a portion at which the stirring motor 136b is rotated.

The power transmission device 136c connects one end of the stirring body 136a and the rotating part of the stirring motor 136b, and transmits power so that the stirring body 136a can be rotated by the operation of the stirring motor 136b. Let's do it. The power transmission device 136c connects the stirring body 136a rotatably disposed in the center of the decomposition space 132 with the stirring motor 136b disposed above, which is a space for supplying steam. When the stirring motor 136b is operated, the stirring body 136a connected to the power transmission device 136c is rotated to stir the organic sludge 1 and the steam inside the decomposition space 132 to promote steam contact heating to hydrolyze. Improve speed. Here, the power transmission device 136c may include any device to which normal power is transmitted. That is, the gear transmission, the chain, etc. may be used for the power transmission device 136c.

The discharge unit 140 is connected to the lower portion of the decomposition tank 131, the discharge pipe 141, the discharge valve 142, the discharge body 143, and the heat exchange body (14) through which the hydrolyzed organic sludge 1 is discharged. 144). The discharge pipe 141 is connected to the lower portion of each decomposition tank 131 arranged in plurality, and is installed so that the hydrolyzed organic sludge 1 is discharged to the outside. The discharge pipe 141 is branched and connected to each decomposition tank 131 arranged in plurality. When the organic sludge 1 is hydrolyzed, the organic organic sludge 1 is hydrolyzed by converting all the nutrient organic substances physically confining water into water-soluble substances. The organic sludge 1 can be easily discharged to the discharge pipe 141 as the fluidity can be freely moved and the fluidity is greatly improved.

The discharge valve 142 is disposed below each decomposition tank 131 arranged in plural, and is connected to the discharge pipe 141. The discharge valve 142 is connected to the discharge pipe 141 to discharge the organic sludge 1 hydrolyzed in the decomposition tank 131. The first to fourth discharge valves 142 are installed in the discharge pipes 141 connected to the first to fourth decomposition tanks 131a, 131b, 131c, and 131d, so that the user has selectively hydrolyzed the organic sludge ( Open and close the discharge pipe 141 so that 1) is discharged to the outside. The hydrolyzed organic sludge 1 is discharged through the discharge pipe 141 by the operation of the discharge valve 142 disposed in the lower portion of the hydrolyzed decomposition tank 131.

Discharge body 143 is disposed on one side of the decomposition tank 131, it is connected to the discharge pipe (141). The discharge body 143 has the hydrolyzed organic sludge 1 discharged to the discharge pipe 141 is stored therein.

The heat exchange body 144 surrounds the sludge supply pipe 112 and has a heat exchange space 145 into which the sludge supply pipe 112 is inserted. In the upper portion of the heat exchange body 144 is formed a heat exchange supply port 146 in communication with the discharge pipe 141 connected to the decomposition tank 131 is supplied with the hydrolyzed organic sludge (1). Under the heat exchange body 144 is hydrolyzed organic sludge 1, which is in communication with the discharge pipe 141 connected to the discharge body 143, supplied from the heat exchange supply port 146 and passed through the heat exchange space 145, The heat exchange outlet 147 is discharged. The latent heat remaining in the hydrolyzed organic sludge 1 heats the sludge supply pipe 112 inserted therein while passing through the heat exchange body 144. That is, as the organic sludge 1 supplied to the sludge supply pipe 112 is supplied to the decomposition tank 131 in a heated state by the latent heat remaining of the hydrolyzed organic sludge 1, the thermal efficiency is improved.

In addition, the organic sludge hydrolysis method according to an embodiment of the present invention will be described with reference to FIG.

5 is a process chart showing the organic sludge hydrolysis method according to an embodiment of the present invention.

Referring to Figure 5, the organic sludge hydrolysis method according to an embodiment of the present invention, organic sludge supply step (S1), decomposition tank heating step (S2), sludge hydrolysis step (S3), heat exchange step (S4), discharge Step S5, and process circulation step S6. In this specification, it is limited to four decomposition tanks 131, and the temperature heated in each decomposition tank 131 will be presented. This is for convenience of description. The decomposition tank 131 may be installed in plural and may be installed in two or more. In addition, since the temperature of the decomposition tank 131 may have a variety of temperature range that can reach the hydrolysis temperature, it is apparent to those skilled in the art that the temperature range of the present specification is only one example and does not limit the claims. .

In addition, as described in Table 1, the temperature and the pressure are correlated with each other in terms of the water vapor pressure characteristics, so that the pressure increases as the temperature increases. For example, when the temperature of 210 ° C., at which the organic sludge is hydrolyzed, has a vapor pressure of 19.2 atm, and when cooled to 140 ° C. by heat exchange, the vapor pressure is reduced to 3.6 atm. That is, the water has a vapor pressure according to the temperature and in the present invention uses a vaporized condensation occurring on the vapor pressure curve, so that even if described as any one of the temperature or pressure, the corresponding pressure or temperature is presented on the vapor pressure curve accordingly. It will be apparent to those skilled in the art.

First, the organic sludge supply step (S1) is a plurality of decomposition is arranged by the pressing force of the pressure pump 113 through the sludge supply pipe 112 connected to one side of the sludge supply body 111 in which the organic sludge 1 is accommodated. It is a step of supplying the organic sludge 1 to each tank 131 by adjusting the organic sludge supply amount to the sludge valve 114.

The organic sludge 1 containing organic matters such as sewage sludge, food waste, and livestock waste water is supplied to be accommodated in the sludge supply body 111, and when the pressure pump 113 is operated, the sludge supply pipe 112 connected to the lower part is supplied. It supplies to the 1st-4th decomposition tank 131a, 131b, 131c, and 131d arrange | positioned in parallel via each other. The first to fourth sludge valves 114a, 114b, 114c, and 114d which are connected to the sludge supply pipe 112 at the time of supply and are disposed on one side of the first to fourth digestion tanks 131a, 131b, 131c, and 131d, respectively. By controlling the supply amount of the organic sludge (1) by the operation of). By the operation of the 1st-4th sludge valves 114a, 114b, 114c, 114d, it supplies in part inside 1st-4th decomposition tank 131a, 131b, 131c, 131d. That is, the sludge space in which the organic sludge 1 is supplied inside the first to fourth decomposition tanks 131a, 131b, 131c, and 131d by operating the first to fourth sludge valves 114a, 114b, 114c, and 114d. Organic sludge (1) is supplied to be divided into steam space where steam and steam are supplied.

The organic sludge 1 surrounds the outer side of the sludge supply pipe 112, and is connected to the first to fourth decomposition tanks 131a, 131b, 131c, and 131d and the discharge pipe 141 to the hydrolyzed organic sludge 1. As it passes through the heat exchange body 144 that is heat exchanged to recover latent heat, it may be supplied with primary heating. That is, the organic sludge 1 having a normal temperature of about 20 ° C. is heated to 1 ° C. at 70 ° C. while passing through the heat exchange body 144 through the sludge supply pipe 112, so that the first to fourth decomposition tanks 131a, 131b, and 131c are heated. 131d).

The cracking tank heating step (S2) is a cracking tank connected to the steam generating body 121 and the steam supply pipe 122 while sensing a temperature by the temperature sensor 135 inside each of the cracking tanks 131 arranged in plurality. By supplying steam to the operation of the steam valve 123 to the step 131 is a step of heating each decomposition tank 131 while having a mutual temperature difference step by step.

The steam generating body 121 is connected to the steam supply pipe 122 so that steam is supplied to the first to fourth decomposition tanks 131a, 131b, 131c, and 131d. In the steam supply pipe 122, the first to fourth steam valves 123a, 123b, 123c, and 123d are supplied to the first to fourth decomposition tanks 131a, 131b, 131c, and 131d so that the respective steam is supplied with a controlled supply amount. It is installed. According to the operation of the first to fourth steam valves (123a, 123b, 123c, 123d) to the first to fourth decomposition tanks (131a, 131b, 131c, 131d) in accordance with the steam supply amount, the temperature is heated The temperature is measured by the 1st-4th temperature sensors 135a, 135b, 135c, and 135d arrange | positioned inside the 4th-4th decomposition tank 131a, 131b, 131c, and 131d.

The steam is activated by the operation of the first steam valve 123a while sensing the temperature of the first to fourth decomposition tanks 131a, 131b, 131c, and 131d by the first to fourth temperature sensors 135a, 135b, 135c, and 135d. To maintain the temperature of the organic sludge supplied to the first decomposition tank 131a at 1 atm of 70 ° C, and the temperature sensed by the second temperature sensor 135b by the operation of the second steam valve 123b is Steam is supplied to the second decomposition tank 131b so as to be 1.2 atm of 105 ° C, and the temperature sensed by the third temperature sensor 135c by the operation of the third steam valve 123c is 3.6 atm of 140 ° C. The fourth decomposition tank 131d is supplied with steam to the third decomposition tank 131c so that the temperature sensed by the fourth temperature sensor 135d by the operation of the fourth steam valve 123d becomes 8.9 atm of 175 ° C. To supply steam.

Therefore, the first to fourth steam valves 123a, 123b, 123c, and 123d are operated on the first to fourth decomposition tanks 131a, 131b, 131c, and 131d to be heated to have different temperatures and pressures.

In the sludge hydrolysis step (S3), the organic sludge (1) inside the digestion tank (131) is supplied by supplying high-temperature, high-pressure steam at a hydrolysis temperature to the decomposition tank (131) having the highest temperature among the plurality of digestion tanks (131). ) Is hydrolyzed by heating to a hydrolysis temperature and maintaining the temperature for a suitable time.

The heated fourth cracking tank 131d is heated to 210 ° C. and hydrolyzed at 210 ° C. for 20 to 30 minutes while mixing steam and organic sludge 1 at 19.2 atmospheres of 210 ° C. At this time, the stirring apparatus 136 is provided inside the 1st-4th decomposition tank 131a, 131b, 131c, and 131d. The stirring device 136 may increase the hydrolysis efficiency by promoting steam mixing heating by stirring the organic sludge 1 and the steam, which are respectively supplied inside the decomposition space 132.

In addition, the stirring device 136 is a sludge organic sludge, while the stirring body 136a disposed in the space supplied with the sludge organic matter and the space supplied with steam is rotated by the operation of the stirring motor 136b connected to the power transmission device 136c. (1) and steam are stirred. The stirring motor 136b is connected to the power transmission device 136c and is installed in the steam space to which steam is supplied so that the organic sludge 1 is not discharged to the outside. By rotating the stirring body 136a connected to the power transmission device 136c by the operation of the stirring motor 136b, the organic sludge 1 and the steam are stirred. At this time, the stirring body 136a passes through the steam space to which the steam is supplied and is in contact with the organic sludge 1 in a heated state by steam, thereby improving heating efficiency.

Therefore, the organic sludge 1 is heated to the hydrolysis temperature by the supplied steam to perform a hydrolysis action in which the organic sludge 1 is separated into an organic aqueous solution and a solid component.

The heat exchange step (S4) converts thermal energy used for heating after hydrolysis into steam of high temperature and high pressure, and converts the steam into another decomposition tank 131 heated step by step according to the temperature difference. By the operation of the heat dissipation tank 133 and the mutually communicating with each other through the heating and pressurized steam of the decomposition tank 131 which is hydrolyzed step by step is supplied to each of the different decomposition tank 131 having a low temperature decomposition tank ( The heat exchanger 131 is cooled and the other digestion tank 131 is heated.

When the hydrolysis is completed at 210 ° C. 19.2 atm in the fourth decomposition tank 131d, the fourth exchange valve 134d of the fourth decomposition tank 131d and the third decomposition tank 131c heated at 3.6 atm 140 ° C. 3 Exchange valve 134c is opened, and mutual heat exchange is carried out through the heat exchange tube 133. When the fourth cracking tank 131d and the third cracking tank 131c are heat-exchanged with each other, it becomes 8.9 atm of 175 ° C. which is an intermediate temperature between the two cracking tanks 131c and 131d. That is, the fourth decomposition tank 131d hydrolyzed by heat exchange is cooled, and the third decomposition tank 131c is heat-exchanged so as to be heated.

After the heat exchange, the third exchange valve 134c is closed to maintain the temperature of the third decomposition tank 131c, and the fourth decomposition tank 131d cooled to 8.9 atmospheres of 175 ° C is heated to 1.2 atmospheres of 105 ° C. The fourth exchange valve 134d and the second exchange valve 134b are opened to be connected to the second disassembly tank 131b. The fourth cracking tank 131d and the second cracking tank 131b are heat-exchanged with each other, resulting in a 3.6 atm of 140 ° C. which is an intermediate temperature between the two cracking tanks 131b and 131d. That is, the 4th decomposition tank 131d is cooled by heat exchange, and the 2nd decomposition tank 131b is heat-exchanged so that it may be heated.

After the heat exchange, the third exchange valve 134c is closed to maintain the temperature of the second decomposition tank 131b, and the fourth decomposition tank 131d cooled to 3.6 atmospheres of 140 ° C maintains a temperature of 70 ° C and 1 atmosphere. The first exchange valve 134a and the fourth exchange valve 134d are opened so as to be connected to the first decomposition tank 131a. The fourth cracking tank 131d and the first cracking tank 131a are heat exchanged to each other to 1.2 atmospheres of 105 ° C. which is an intermediate temperature between the two cracking tanks 131a and 131d. That is, the fourth decomposition tank 131d is cooled by heat exchange, and the first decomposition tank 131a is heat-exchanged so as to be heated.

Therefore, after hydrolysis in the fourth decomposition tank 131d, the first decomposition tank 131c, the second decomposition tank 131b, and the first decomposition tank 131a, which are heated to differentially heat, are sequentially The fourth to fourth exchange valves 134a, 134b, 134c, and 134d are operated to cool, and the hydrolysis heat of the fourth decomposition tank 131d is heated to each decomposition tank 131 to improve thermal efficiency.

In addition, the fourth decomposition tank 131d and the third to first decomposition tanks 134c, 134b, and 134a are sequentially connected to each other according to temperature and pressure to be heat exchanged. The steam of 131d is sequentially supplied to the low pressure third to first cracking tanks 134c, 134b, and 134a, and the supplied steam is equal to each other and the low pressure cracking tank 131 to which steam is supplied. The pressure rises inside of). Each decomposition tank 131 which is heat-exchanged according to the above-mentioned pressure rise is generated by the heat of condensation, and is heated by the heat of condensation. At this time, the stirring apparatus 136 is stirred to improve the heating rate. That is, by the connection of the decomposition tanks 131, the high temperature sludge is cooled by the movement of steam due to the difference in the vapor pressure at different temperatures, and the low temperature sludge is simultaneously heated and cooled by heat exchange. To improve the rate of continuous hydrolysis.

The discharge step (S5) is the organic sludge (1) hydrolyzed toward the discharge body 143 by the operation of the discharge valve 142 through the discharge pipe 141 is connected to the decomposition tank 131 cooled by heat exchange. It is a step of discharging.

The hydrolyzed organic sludge 1 cooled in the fourth decomposition tank 131d is discharged to the discharge body 143 through the discharge pipe 141 connected to the lower portion by the operation of the first discharge valve 142a. When the organic sludge 1 is heated and hydrolyzed, all of the insoluble nutrients that constrain the movement of water in the organic sludge 1 are decomposed into water-soluble substances, are dissolved in water, and are easily converted into aqueous solutions. Thus, the hydrolyzed organic sludge 1 can be easily moved without the pressure supplied.

At this time, the discharge pipe 141 is connected to the heat exchange body 144 surrounding the sludge supply pipe 112 to heat the organic sludge 1 supplied to the sludge supply pipe 112 while passing through the inside of the heat exchange body 144. As the organic sludge 1 is supplied to each decomposition tank 131 in a heated state, thermal efficiency may be improved.

Therefore, the latent heat of the hydrolyzed organic sludge 1 having heat after hydrolysis can be reused for heating the supplied organic sludge 1.

In the process circulation step S6, the organic sludge 1 is supplied to the discharged decomposition tank 131, and the hydrolysis temperature is supplied to the decomposition tank 131 having the highest temperature among other decomposition tanks 131 heated by heat exchange. The steam is supplied from the steam supply device 120 so as to have a pressure of 10 to 40 at a temperature of 180 to 250 ° C., and the organic sludge 1 is heated to be hydrolyzed, and after the hydrolysis, each decomposition tank 131 connected in parallel with each other in stages. The heat exchange is carried out in), and after cooling by heat exchange, the process of discharging through the discharge pipe 141 is continuously performed for each decomposition tank 131 to circulate the process.

The fourth sludge valve 114d is opened in the fourth decomposition tank 131d to supply the organic sludge 1 by the pressing force of the pressure pump 113. The organic sludge 1 heated at a temperature of 70 ° C. 1 atm by latent heat of the hydrolyzed organic sludge 1 is supplied to the fourth decomposition tank. Temperature which is hydrolyzed by opening the third steam valve 123c and operating the stirring device 136 so that the steam is supplied from the steam supply device 120 to the third decomposition tank 131c maintaining 9 atmospheres of 175 ° C. It heats so that it may be set to 19.2 atmospheres of 210 degreeC which is phosphorus, and the organic matter sludge 1 is hydrolyzed inside the 3rd decomposition tank 131c. After hydrolysis, the third decomposition tank 131c is sequentially cooled by heat exchange with the second decomposition tank 131b, the first decomposition tank 131a, and the fourth decomposition tank 131d, and the cooled hydrolyzed organic matter. The sludge 1 is discharged to the discharge body 143 through the discharge pipe 141 by the operation of the third discharge valve 142c while recovering the latent heat through the heat exchange body 144.

As described above, looking at the repeated process of the process in which the organic sludge 1 is hydrolyzed and discharged in detail through Table 2 as follows.

In the following, Table 2 describes the first to fourth decomposition tanks 134a, 134b, 134c, and 134d as ①, ②, ③, ④, and the process is briefly described.

step condition Temperature pressure ① ② ③ ④ One hydrolysis
Sludge supply 70 ℃
1 atmosphere 105
1.2 atmospheres 140
3.6 atmospheres 210
19.2 atmospheres 2 ④③ connection
Heat exchanger 70
1 atmosphere 105
1.2 atmospheres 175
9 atmospheres 175
9 atmospheres 3 ④② connection
Heat exchanger 70
1 atmosphere 140
3.6 atmospheres 175
9 atmospheres 140
3.6 atmospheres 4 ④① Connection
Heat exchanger 105
1.2 atmospheres 140
3.6 atmospheres 175
9 atmospheres 105
1.2 atmospheres 5 ④ discharge
③ Steam heating 105
1.2 atmospheres 140
3.6 atmospheres 210
19.2 atmospheres exhaust 6 ③ Hydrolysis
④ Sludge Supply 105
1.2 atmospheres 140
3.6 atmospheres 210
19.2 atmospheres 70
1 atmosphere 7 ③② connection
Heat exchanger 105
1.2 atmospheres 175
9 atmospheres 175
9 atmospheres 70
1 atmosphere 8 ③① Connection
Heat exchanger 140
3.6 atmospheres 175
9 atmospheres 140
3.6 atmospheres 70
1 atmosphere 9 ③④ Connection
Heat exchanger 140
3.6 atmospheres 175
9 atmospheres 105
1.2 atmospheres 105
1.2 atmospheres 10 ③ Discharge
② Steam heating 140
3.6 atmospheres 210
19.2 atmospheres exhaust 105
1.2 atmospheres 11 ② Hydrolysis
③ Sludge Supply 140
3.6 atmospheres 210
19.2 atmospheres 70
1 atmosphere 105
1.2 atmospheres 12 ②①Connection
Heat exchanger 175
9 atmospheres 175
9 atmospheres 70
1 atmosphere 105
1.2 atmospheres 13 ②④ Connection
Heat exchanger 175
9 atmospheres 140
3.6 atmospheres 70
1 atmosphere 140
3.6 atmospheres 14 ②③ connection
Heat exchanger 175
9 atmospheres 105
1.2 atmospheres 105
1.2 atmospheres 140
3.6 atmospheres 15 ② discharge
① Steam heating 210
19.2 atmospheres exhaust 105
1.2 atmospheres 140
3.6 atmospheres 16 ① Hydrolysis
② Sludge Supply 210
19.2 atmospheres 70
1 atmosphere 105
1.2 atmospheres 140
3.6 atmospheres 17 ①④ Connection
Heat exchanger 175
9 atmospheres 70
1 atmosphere 105
1.2 atmospheres 175
9 atmospheres 18 ①③ Connection
Heat exchanger 140
3.6 atmospheres 70
1 atmosphere 140
3.6 atmospheres 175
9 atmospheres 19 ①② Connection
Heat exchanger 105
1.2 atmospheres 105
1.2 atmospheres 140
3.6 atmospheres 175
9 atmospheres 20 ① Discharge
④ Steam heating exhaust 105
1.2 atmospheres 140
3.6 atmospheres 210
19.2 atmospheres

As shown in Table 2 above, the four digestion tanks 131 arranged in the present specification are hydrolyzed by continuously performing hydrolysis, heat exchange, and discharge processes of organic sludge while repeating a 20 step process. do. This is described with respect to the four decomposition tanks of the present specification, for convenience of description. Therefore, it is apparent to those skilled in the art that a plurality of decomposition tanks may be installed at least two or more, and the present invention does not limit the number of decomposition tanks.

Therefore, the organic sludge is continuously discharged as the hydrolyzed sludge is continuously discharged by cyclically performing the supply, hydrolysis, heat exchange, and discharge process of the above-described organic sludge 1 for each decomposition tank 131 sequentially. The hydrolysis efficiency of (1) is increased.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a perspective view showing an organic sludge hydrolysis apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an organic sludge hydrolysis device of FIG. 1. FIG.

3 is a use state diagram illustrating a use state of the organic sludge hydrolysis apparatus of FIG. 1.

4 is a side cross-sectional view showing a hydrolysis part and a stirring device which are main components of the organic sludge hydrolysis device of FIG. 1.

5 is a process chart showing the organic sludge hydrolysis method according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: hydrolysis device 110: sludge supply device

111: sludge supply body 112: sludge supply pipe

113 pressure pump 114 sludge valve

114a: first sludge valve 114b: second sludge valve

114c: third sludge valve 114d: fourth sludge valve

120: steam supply unit 121: steam generating body

122: steam supply pipe 123: steam valve

123a: first steam valve 123b: second steam valve

123c: third steam valve 123d: fourth steam valve

130: hydrolysis unit 131: decomposition tank

131a: first decomposition tank 131b: second decomposition tank

131c: third decomposition tank 131d: fourth decomposition tank

132: decomposition space 133: heat exchanger tube

133a: first heat exchanger tube 133b: second heat exchanger tube

133c: third heat exchange tube 133d: fourth heat exchange tube

134: exchange valve 134a: first exchange valve

134b: second exchange valve 134c: third exchange valve

134d: fourth exchange valve 135: temperature sensor

135a: first temperature sensor 135b: second temperature sensor

135c: third temperature sensor 135d: fourth temperature sensor

136: stirring device 136a: stirring body

136b: Stirring Motor 136c: Power Train

140: discharge part 141: discharge pipe

142: discharge valve 142a: first discharge valve

142b: second discharge valve 142c: third discharge valve

142d: fourth discharge valve 143: discharge body

144: heat exchanger body 145: heat exchange space

146: heat exchange supply port 147: heat exchange outlet

Claims (12)

Disintegration tank equipped with steam supply, sludge supply, sludge discharge pipe, Half of the sludge and steam are introduced into the decomposition tank to form a sludge space and a vapor space. The digester is arranged in plurality It is equipped with a heat exchange tube and an exchange valve connecting the steam spaces of the cracking tanks with each other Make the digesters at different temperatures in stages Among the cracking tanks, a cracking tank having the highest temperature is heated to the hydrolysis temperature with the heating device to form a high temperature cracking tank containing hydrolyzed hot sludge. Opening the exchange valve of the decomposition tank having the highest temperature among the exchange valve of the high temperature decomposition tank and the other low temperature decomposition tanks causes the high temperature of the high temperature decomposition tank to change due to the pressure change of the steam space caused by the difference in steam pressure according to the temperature difference. Steam is generated in the sludge and cooled and the generated steam is transferred to the low temperature cracking tank and condensed in the low temperature cracking tank to heat exchange the low temperature sludge to be heated. When the heat exchange is completed, the exchange valve of the low temperature side decomposition tank is blocked and the exchange valve of the decomposition tank having the temperature of the next stage is opened to exchange heat. Proceed to this in sequence to increase the temperature of all the remaining decomposition tanks by one step while hydrolyzed hot sludge is cooled and discharged New sludge is introduced into the discharged digestion tank to form the lowest temperature digestion tank to construct a plurality of the digestion tanks having different temperatures in stages. The organic sludge hydrolysis apparatus which repeats the heat exchange process by heating and hydrolyzing the decomposition tank of the highest temperature again to form a new high temperature decomposition tank. The method of claim 1, Is disposed on one side of the decomposition tank, the organic sludge hydrolysis apparatus further comprises a temperature sensor for sensing the temperature of each of the plurality of decomposition space arranged. The method of claim 1, The sludge supply device, A sludge supply body in which the organic material sludge is stored, A sludge supply pipe connecting the sludge supply body and the plurality of digestion tanks, respectively, to connect the stored sludge to the digestion tank, respectively; A pressure pump disposed on one side of the sludge supply body and connected to the sludge supply pipe to provide a pressing force to which the sludge is supplied; Sludge valves disposed on one side of the plurality of digestion tanks and connected to the sludge supply pipe to open and close the sludge supply pipe to supply the organic sludge to the plurality of digestion tanks. Including; The organic sludge stored in the sludge supply body and supplied through the sludge supply pipe by the pressing force of the pressure pump may be selectively supplied to the plurality of decomposition tanks connected to the sludge supply pipe by the operation of the sludge valve. Organic sludge hydrolysis device. The method of claim 1, The organic material sludge hydrolysis apparatus which is arrange | positioned inside the said decomposition tank, and further provided with the stirring apparatus which stirs the said organic material sludge and the said steam supplied to the said decomposition space. The method of claim 4, wherein The stirring device, A stirring body disposed inside the disassembly body and supported to be rotated in the disassembly space; Is disposed outside one side of the decomposition tank, the rotary motor is inserted into the decomposition space direction and rotated by the operation, and It is disposed inside the decomposition tank, the power transmission device is connected to rotate the stirring body and the rotary motor together. Including; The stirring body may be positioned in the center of the decomposition space to rotate the organic sludge and the steam while the organic sludge is supplied by the rotation of the operation of the rotary motor in the space and the space supplied with the steam, The stirring body is partially located in the space in which the steam is supplied can be stirred of the organic sludge and the steam in a heated state when the steam supply, The rotary motor is connected to the stirring body and the power transmission device located in the center to be inserted into the space in which the steam is supplied to the decomposition space to rotate the stirring body Organic sludge hydrolysis device. The method of claim 1, The steam supply device, Is disposed on one side of the decomposition tank, the steam generating body to generate steam by heating the water, A steam supply pipe connecting the steam generating body and each of the plurality of decomposition tanks, the steam supply pipe being connected to supply the steam generated from the steam generating body to each of the plurality of decomposition tanks, and A steam valve disposed on one side of the plurality of cracking tanks, the steam valve being connected to the steam supply pipe and opened and closed to adjust a supply amount of the steam respectively supplied to the plurality of cracking tanks; Including; The steam valve is capable of selectively supplying the steam in accordance with the temperature of the plurality of decomposition tanks Organic sludge hydrolysis device. The method of claim 1, Organic sludge hydrolysis apparatus disposed on one side of the plurality of decomposition tank, further comprising a discharge valve connected to the discharge pipe to open and close the discharge of the hydrolyzed organic sludge discharged from the decomposition tank. The method of claim 1, Wrapped around the outer periphery of the sludge supply pipe, having a heat exchange space into which the sludge supply pipe is inserted, and further comprising a heat exchange body connected to the discharge pipe at the top and the bottom, respectively, The heat exchange body may be supplied in a state in which the organic sludge supplied from the sludge supply pipe is heated with latent heat of the hydrolyzed organic sludge discharged through the discharge pipe. Organic sludge hydrolysis device. Supplying organic sludge while adjusting the sludge supply amount with a sludge valve to each of the digestion tanks arranged in plural through pressurized pump pressure through a sludge supply pipe connected to one side of the sludge supply body in which organic sludge is stored, A step of heating each digester while having a temperature difference step by step by supplying steam by the operation of a steam valve to the digester connected to the steam generating body and the steam supply pipe while sensing the temperature in each digester arranged in a plurality , Hydrolyzing organic sludge in the digestion tank by supplying steam to a decomposition tank having the highest temperature among the plurality of digestion tanks so as to have a pressure of 10 to 40 atm of 180 to 250 ° C., After the hydrolysis, the steam used for heating is selectively communicated with each other through the heat exchange tube by the operation of an exchange valve to the different digesters heated in stages according to the temperature difference. Heat exchange such that the digester that is hydrolyzed as the cold air exchanges is cooled and the other digester is heated; Discharging the hydrolyzed organic sludge to the discharge body by the operation of the discharge valve through the discharge pipe connected to the digester cooled by heat exchange, and The organic sludge is supplied to the discharged digestion tank, and the steam is supplied to the highest decomposition tank heated by heat exchange to supply 10 to 40 atm of hydrolysis temperature of 180 to 250 ° C. After hydrolysis, the organic sludge is hydrolyzed, and after the hydrolysis, heat exchange is carried out in each decomposition tank connected in parallel, and after cooling by heat exchange, the process of discharging through the discharge pipe is continuously performed for each decomposition tank to circulate the process. step Organic sludge hydrolysis method comprising a. 10. The method of claim 9, In the step of supplying the organic sludge, a supply amount is controlled by each of the sludge valves disposed in each of the digestion tanks arranged in plural, and a part of the organic sludge is supplied to the inside of the digestion tank to form a space in which steam is supplied. Organic sludge hydrolysis method. 10. The method of claim 9, In the hydrolysis step, an organic sludge hydrolysis method for agitating the sludge and steam supplied by the operation of the stirring device is installed inside the decomposition tank to hydrolyze each other. 10. The method of claim 9, In the step of discharging the organic sludge, the heat exchanger body surrounding the outer surface of the sludge supply pipe is connected to one side of the discharge pipe. When the hydrolyzed organic sludge is supplied through the discharge pipe, the organic sludge supplied to the sludge supply pipe passes through the heat exchange body. A method for hydrolyzing organic sludge which can be heated to reuse latent heat remaining during hydrolysis.

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