WO2010107263A2 - Sludge hydrolysis device, a sludge hydrolysis method using the same, and a contact type of heat exchange unit and steam type of heat exchange unit provided in the sludge hydrolysis device - Google Patents

Abstract

In the present invention sludge is continuously subjected to hydrolysis by being heated with steam and, in the hydrolysis process, heat exchange is carried out between the low temperature sludge and the hydrolysed high temperature sludge, thereby making it possible to reduce the energy used to heat the low temperature sludge and obviating the need for equipment to cool the high temperature sludge.

Description

Sludge hydrolysis device, sludge hydrolysis method using the same, contact heat exchange unit and steam heat exchange unit provided in the sludge hydrolysis device

The present invention relates to a sludge hydrolysis apparatus, a sludge hydrolysis method using the same, a contact heat exchange unit and a steam heat exchange unit provided in the sludge hydrolysis apparatus, and more specifically, the hydrolyzed hot sludge and the cold sludge to be hydrolyzed Regarding the sludge hydrolysis apparatus, the sludge hydrolysis method using the same, the contact heat exchange unit and the steam heat exchange unit provided in the sludge hydrolysis apparatus can reduce the energy required for the hydrolysis of the sludge by the heat exchange between the will be.

This application claims the priority based on Korea Patent Application No. 10-2009-23282, 10-2009-23283, 10-2009-23284 filed March 18, 2009, the contents disclosed in the specification and drawings of the three applications Are incorporated herein by this application.

In general, when organic sludge (hereinafter referred to as 'sludge') in sewage sludge and food waste and livestock wastewater is discharged as waste, it may cause environmental pollution such as leachate, odor and pest generation. On the other hand, the sludge contains a lot of energy of more than 3000 kcal per kg after drying, it would be very economically useful if the energy can be recovered in the process of sludge, but the water content of the sludge is high to 80% so far, The energy involved is not being used economically.

In other words, the sludge can recover energy by removing more than 80% of the water contained or decomposing it into microorganisms, and many technologies have been developed for this purpose. Or there is a problem such as odor occurrence. Therefore, up to now, most of the sludge has been treated by ocean dumping or compost utilization. However, ocean dumping causes a problem of marine pollution, the use of compost has a problem that generates a large amount of methane gas causing global warming in the decomposition process.

On the other hand, organic substances are mostly composed of carbohydrates, proteins, and lipids, which are high molecular compounds in which glucose, amino acids, and fatty acids are combined, and when these organic substances are heated to a high temperature of 200 ° C. or higher with water, they are decomposed into glucose or amino acids. It is called.

Various methods for treating sludge have been devised using the principle of hydrolysis. However, the conventional hydrolysis apparatus directly heats the sludge at room temperature to 200 ° C. or higher in order to hydrolyze the sludge introduced into the heating vessel. In addition to the excessive heat energy required, there was a problem in that a batch-type treatment of hydrolysis was made once by making a closed container.

Due to such a problem, the hydrolysis device has low energy efficiency because of less energy such as solids recovered than the input thermal energy, and thus, the sludge treatment method is not economical.

Therefore, a heat exchanger capable of exchanging heat with the hydrolyzed high temperature sludge and the low temperature sludge to be hydrolyzed to reduce the input energy by reusing the energy used for heating in the hydrolysis apparatus is required. There is a need for the development of a continuous hydrolysis device that can be continuously hydrolyzed to create a flow of heat exchange.

In addition, low-temperature sludge has extremely poor fluidity, so that heat transfer by convection is not performed, and thermal conductivity is very low, and thus heat transfer by contact is difficult.

Therefore, the development of new sludge hydrolysis apparatus and method, and heat exchanger apparatus for efficient hydrolysis by improving these problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the heat exchange is performed between the cold sludge to be hydrolyzed and the hydrolyzed hot sludge, thereby reducing the energy used for heating the cold sludge and requiring an apparatus for cooling the hot sludge. It is an object of the present invention to provide a continuous sludge hydrolysis apparatus, a sludge hydrolysis method using the same, a contact heat exchange unit and a steam heat exchange unit provided in the apparatus.

Still another object of the present invention is to use a steam pressure curve of water, using the principle of heating the cold sludge when the hot sludge is rapidly cooled while generating steam when the pressure is lowered and condensed by contact with the cold sludge. And it is to provide a steam heat exchange unit, a sludge hydrolysis apparatus having the same, and a sludge hydrolysis method using the same so that heat exchange is carried out through the movement of steam between the low temperature sludge and the low temperature sludge.

Another object of the present invention is to place a plurality of the steam heat exchange unit in series so that the steam heat exchange between the high temperature sludge and the low temperature sludge is performed a plurality of times to significantly reduce the heat energy required for hydrolysis of the low temperature sludge. It is to provide a sludge hydrolysis apparatus that can be, and a sludge hydrolysis method using the same.

It is still another object of the present invention to provide low-temperature sludge heat exchange heating in a temperature range in which heat exchange using water vapor is not effective due to low vapor pressure of water, and has poor fluidity on the outer surface of the high-temperature sludge tube through which high-temperature hydrolyzed sludge flows. A contact heat exchange unit for allowing heat exchange by contact between the hot sludge in contact with the hot sludge tube and the cold sludge by rotating the hot sludge tube while contacting the low temperature sludge with a thin thickness, a sludge hydrolysis apparatus having the same; It is to provide a sludge hydrolysis method using the same.

Still another object of the present invention is to provide a sludge hydrolysis apparatus and a sludge hydrolysis method using the same, in which the contact heat exchange is performed a plurality of times, thereby significantly reducing the thermal energy required for hydrolysis of low temperature sludge. .

Still another object of the present invention is to continuously inject low temperature sludge into a heating vessel of 210 ° C and 20 atm of high vapor pressure so that hydrolysis can be continuously performed by using fluidizing property when low temperature sludge having extremely poor fluidity is hydrolyzed. And a sludge hydrolysis apparatus using a continuous heating unit capable of continuously discharging sludge heated and hydrolyzed from a container, and a sludge hydrolysis method using the same.

In order to achieve the above object, the heating unit according to the present invention installs a partition wall in a pressure vessel so as to be horizontally partitioned into a hydrolysis vessel and a discharge vessel, and the hydrolysis vessel is vertically partitioned into a vapor space and a sludge space. . When the stirring member reciprocates the steam space and the sludge space, the low temperature sludge and the water vapor are mixed and heated, and the low temperature sludge is hydrolyzed to melt like water and discharged into the discharge vessel over the bulkhead to continuously hydrolyze the low temperature sludge.

In this way, a heating unit in which the low temperature sludge is continuously hydrolyzed at a constant speed is devised, and the low temperature sludge and the high temperature sludge are heated to heat the low temperature sludge continuously supplied to the heating unit and to cool the high temperature sludge discharged continuously from the heating unit. Heat exchange between cold sludge and hot sludge using the temperature difference of.

First, since the hydrolyzed hot sludge discharged from the heating unit has high temperature and pressure, high pressure steam having high energy density may be utilized as a medium for heat exchange. Therefore, the hot sludge is injected into a low pressure vessel to generate steam corresponding to the pressure difference, thereby cooling the hot sludge and sending the steam to the cold sludge container so as to contact the cold sludge to condense the steam so as to heat the cold sludge. A heat exchange unit is used to exchange heat between the cold sludge and the hot sludge.

First, hydrolyzed hot sludge through the steam heat exchanger unit is cooled to some degree to produce high pressure steam, but the hydrolysis process is used to improve the fluidity. The cold sludge to be cooled on contact and vice versa is heat exchanged using a contact heat exchange unit that is heated in contact with the outer surface of the cylinder.

In the sludge hydrolysis apparatus according to the present invention, low-temperature sludge having poor fluidity is sequentially passed through the contact heat exchanger and the steam heat exchanger, and the hydrolyzed high temperature sludge is sequentially applied to the steam heat exchanger and the contact heat exchanger. Make it through. Heat transfer between the hot sludge and the cold sludge during the contact heat exchanger and the steam heat exchanger minimizes the heating energy required to hydrolyze the cold sludge, as well as effectively cool and hydrolyze the hot sludge. The manufacturing cost of the device can also be reduced.

In addition, the steam heat exchange unit according to the present invention uses the principle of heating the low temperature sludge while condensing the water vapor when the low temperature sludge is in contact with the water vapor having a temperature and pressure on the vapor pressure curve. Specifically, water vapor with a temperature and pressure on the vapor pressure curve turns into water when it is only slightly cooled. In a steam heat exchange unit, the water vapor in this state is filled with water vapor, and when the cold sludge comes into contact with water vapor in this state, the contacted water vapor is cooled. Condensation proceeds as space is emptied as condensation draws water vapor into continuous contact with the sludge, and the surface of the cold sludge is heated by the heat of condensation of the steam, and the heat of condensation is transferred to the inside of the sludge to heat the cold sludge do.

The hydrolyzed hot sludge is discharged from the contact heat exchange unit and then separated into a solid concentrate and a liquid fraction by a solid-liquid separator. The solid concentrate is separated into a solid component and a liquid component using a conventional dehydrator such as a filter press or a centrifugal dehydrator. The liquid fraction discharged from the solid-liquid separator and the liquid fraction discharged from the dehydrator are subjected to anaerobic digestion to obtain methane gas, and the digestion liquid is treated with aerobic microorganisms to make clean water and then released. The sludge produced in this process is hydrolyzed again It is sent to the device and hydrolyzed.

Solids discharged from the dehydrator are thermally decomposed in an oxygen-free high temperature environment, and are made of gas and carbides to be energy resources.

1 is a graph showing a vapor pressure curve of water and a relationship between water temperature and thermal energy.

Figure 2 is a view showing the configuration of the sludge hydrolysis apparatus according to the present invention, and the treatment of the hot sludge discharged from the sludge hydrolysis apparatus.

Figure 3 is a view showing a cross section of the heating unit and the pressurized injection unit of the sludge hydrolysis apparatus according to the present invention.

Figure 4 (a) is a perspective view showing a pressure injection unit provided in the sludge hydrolysis apparatus according to the present invention.

Figure 4 (b) is a perspective view showing a pressure injection unit provided in the sludge hydrolysis apparatus according to the present invention.

Figure 5 is a perspective view showing a first embodiment of the steam heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention.

6 is a cross-sectional view showing the steam heat exchange unit of FIG.

FIG. 7 is a partial cutaway perspective view illustrating a hot sludge injection unit provided in the steam heat exchange unit of FIG. 5.

8 is an exploded perspective view showing the first and second rotors provided in the steam heat exchange unit of FIG. 5.

9 is a perspective view showing a second embodiment of the steam heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention.

10 is a perspective view showing a plurality of steam heat exchange unit of Figure 9 connected in series.

11 is a perspective view showing a first embodiment of the contact heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention.

FIG. 12 is a schematic view showing the longitudinal section of the contact heat exchange unit of FIG. 11. FIG.

FIG. 13 is a perspective view illustrating a unit member provided in the contact heat exchange unit of FIG. 11.

14 is a cross-sectional view taken along the line A-A 'of the unit member of FIG.

Figure 15 is a longitudinal cross-sectional view showing a second embodiment of the contact heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention.

16 is a view showing a power transmission configuration for driving the contact heat exchange unit of FIG.

17 is a partial cutaway and partially exploded perspective view showing a third embodiment of the contact heat exchanger unit provided in the sludge hydrolysis apparatus according to the present invention.

18 is a partially cut away and partially exploded perspective view showing a fourth embodiment of the contact heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: organic sludge storage tank

200a, 200b, 200c, 200d: contact heat exchange unit

300, 300a: steam heat exchange unit

400: heating unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

Referring first to the thermal characteristics of the water with reference to Figure 1 as follows.

When water absorbs energy, the temperature rises or the state changes from liquid to gas, while the temperature pressure curve is called the water vapor pressure curve. At a certain temperature, water is present as a liquid if the external pressure is higher than the vapor pressure curve pressure and as a gas when the external pressure is low.

In particular, water vapor having a temperature and pressure on the vapor pressure curve immediately turns into water, and water having a temperature and pressure on the vapor pressure curve turns into water vapor even when the pressure is slightly lowered to maintain the equilibrium of the vapor pressure curve.

When water changes its state to water vapor, it absorbs 540 kcal / kg of energy at 1 atm of 100 ° C and expands approximately 1700 times in volume, and releases and condenses the same energy when changing from water vapor to water. The pressure and temperature relationships in the vapor pressure curve of water are shown in Table 1.

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

The heat energy required to raise the temperature of water is 100cal up to 100 ℃, 151cal up to 150 ℃, 203cal up to 200 ℃, 259cal up to 250 ℃, and 321cal up to 300 ℃. The temperature-energy relationship is similar at low and high temperatures, but for temperature and pressure As shown in Table 1, the pressure-to-pressure relationship rapidly rises at 1 ° C at 100 ° C, 4.7 atm at 150 ° C, 15.6 at 200 ° C, 40.1 at 250 ° C, and 86.5 at 300 ° C. The temperature-energy relationship and the temperature-pressure relationship are shown in FIG. 1.

On the other hand, the sludge may be heated through direct heating or may be heated through heat exchange heating. Here, direct heating is a method of heating the sludge by supplying heat energy from the outside, heat exchange heating is a method of heating the low temperature sludge by heat exchange between the hot sludge and low temperature sludge without external heat energy supply.

Comparing the costs for direct heating and heat exchange heating, heat exchange heating is more economical because direct heating requires both energy and equipment costs, but heat exchange heating requires no equipment costs and only equipment costs.

Heat exchange heating is a technology that uses the natural phenomenon of heat transfer in which medium sludge is made by using the temperature difference between high temperature sludge and low temperature sludge. Therefore, heat energy of hydrolyzed high temperature sludge is transferred to low temperature sludge to be hydrolyzed. After this heat exchange heating, the final heating up to the hydrolysis temperature should be directly heated.

Contact heat exchange is a method in which heat sludge and low temperature sludge are not mixed with each other in order to heat low temperature sludge, which is poor in fluidity, and heat exchanges with each other through heat conduction by contact and stirring through intermediate metals.

The steam heat exchange is cooled while generating hot steam when the hot sludge is exposed to a pressure lower than the vapor pressure, and the steam is transferred to the cold sludge container and condensed while contacting the cold sludge injected into the container, thereby heating the cold sludge. That's the way.

The sludge hydrolysis apparatus according to the present invention exchanges heat in a heat exchange method with a low temperature sludge while the hydrolyzed high temperature sludge is discharged, so that the heat of the high temperature sludge is reused, so that 1/3 to 1/5 of the sludge hydrolysis apparatus is not used. It is possible to hydrolyze low temperature sludge with only thermal energy, and no separate cooling device is required to cool the high temperature sludge.

On the other hand, in the sludge, components such as starch or protein exist in the polymer state, and when the heat is applied, the polymer stretches long and water is trapped in between, and the water is solidified so as not to be physically separated from the water. However, when more heat is applied and heated to 180 ° C. or more, the long starch and protein in the polymer state are decomposed into glucose or amino acid while being inserted into water molecules by hydrolysis at high temperature and high pressure, and the glucose or amino acid is well dissolved in water, It is separated into solids that do not hydrolyze and change to.

At this time, when the temperature increases, the time for hydrolysis is shortened, but it usually takes about 90 minutes at 180 degrees, but it is faster to 30 minutes to 60 minutes at 200 degrees, 30 minutes or less at 210 degrees, and the degree of hydrolysis is different. Accordingly, other hydrolysis temperatures may be selected and used according to the hydrolysis target organic substance, and the present invention will be described using a hydrolysis temperature of 210 degrees.

In general, the sludge has poor fluidity, so no convection circulation by heating occurs, which results in poor heat transfer and very low thermal conductivity, so that the sludge in contact with the container is heated even when the container is heated to a high temperature, but the sludge inside the container is not heated well. Do not. Therefore, for effective heating, steam heating in which hot steam is brought into direct contact with sludge and heated by condensation of water vapor is preferred.

For this purpose the present invention utilizes "vapor contact heating". In steam-contact heating, objects that come into contact with water vapor are first heated to the temperature of water vapor. First, heat from the heated surface is sequentially transferred to the inside by heat transfer. It is made continuously, it means that the heating by the condensation of water vapor is continuously made until the same temperature as the water vapor to the inside of the object. In particular, when the sludge and water vapor are mixed and stirred, the rate of sludge heating due to the condensation of water vapor increases very rapidly, thereby overcoming the low thermal conductivity of the sludge and heating the sludge.

When a cold object moves into saturated water vapor, the water vapor that comes into contact with the object is cooled and instantly turns into water by the vapor pressure of the water. When this water is turned into water, the volume changes to 1/1700. The water vapor is cooled and turns into water, rapidly absorbing the nearby water vapor, and condensation proceeds rapidly until the side where the water vapor contacts is heated to equal the temperature of the water vapor.

The steam contact heating technology is applied to the hydrolysis vessel of the heating unit and the low temperature heat exchanger vessel of the steam heat exchanger unit. The temperature of the object to be heated and the steam to be heated may be the same, but in reality, the heating time is improved to improve the efficiency of the apparatus. To some extent a temperature difference occurs. Due to this feature, in the hydrolysis apparatus using steam contact heating technology, the supply and control of water vapor can be controlled at the measured pressure, so the configuration of the apparatus is very convenient and all other problems of the heating apparatus can be solved.

On the other hand, the sludge dehydrates as much as possible, but the fluidity is extremely poor, but after 80% of the water present in the cell solution is hydrolyzed, the solids present in the aqueous solution and hindering the fluidity are finely pulverized and the hydrolyzed sludge is rapidly improved. do. Therefore, the hydrolyzed sludge flows almost like water, and thus, the high-temperature sludge movement and heat exchanger configuration after hydrolysis are configured in consideration of the fluidity change.

In particular, the method of controlling the discharge device of the hydrolysis vessel or the discharge device of the high temperature heat exchange vessel by using a water level sensor takes into account the fluidity characteristics of the hydrolyzed hot sludge.

In addition, in the contact heat exchange unit, a configuration in which the hot sludge passes through the inside of the rotating cylindrical hot sludge tube and the low temperature sludge is in contact with the outside of the hot sludge tube for heat exchange is also a technology utilizing the change in fluidity.

That is, when the fluidity is increased, the heat transfer of the fluid by convection is made, so that the heat transfer of the hot sludge inside the high temperature sludge tube is smooth, so that the temperature of the hot sludge is kept the same, so that the high temperature sludge tube can be kept at a high temperature.

With reference to FIG. 2, the sludge hydrolysis apparatus which concerns on this invention is demonstrated.

The sludge hydrolysis apparatus includes a heating unit 400, a steam heat exchange unit 300, and a contact heat exchange unit 200.

The heating unit 400 heats and hydrolyzes the low-temperature sludge injected from the low-temperature heat exchange vessel 310 by using steam supplied from the boiler 640 to make high-temperature sludge and discharges the sludge. It is not batchwise but continuously at a constant speed. The cold sludge is injected into the heating unit 400 by the pressure injection unit 420.

The steam heat exchange unit 300 includes a low temperature heat exchange vessel 310 and a high temperature heat exchange vessel 350. The hot sludge discharged from the heating unit 400 is injected into the high temperature heat exchange vessel 350, and the cold sludge discharged from the contact heat exchange unit 200 is injected into the low temperature heat exchange vessel 310.

In the high temperature heat exchange vessel 350, water vapor is generated in the high temperature sludge due to a difference between the vapor pressure of the injected hot sludge and the internal pressure of the high temperature heat exchange vessel 350. At this time, since the steam is generated in the hot sludge, the hot sludge is cooled due to the heat of vaporization of the steam.

In addition, the steam moves from the high temperature heat exchange vessel 350 to the low temperature heat exchange vessel 310, and then condenses by contact with the low temperature sludge injected into the low temperature heat exchange vessel 310, and condenses heat generated by the condensation of the water vapor. The cold sludge is thereby heated. The cold sludge heated in this way is pressurized by the pressure injection unit 420 and injected into the heating unit 400 having a high pressure. Meanwhile, the low temperature sludge injected into the low temperature heat exchange vessel 310 is supplied from the contact type heat exchange unit 200. The low temperature sludge is pressurized by the pressure injection unit 380 and injected into the low temperature heat exchange vessel 310.

The low temperature sludge is injected from the organic sludge tank 100 and the high temperature sludge discharged from the vapor type heat exchange unit 300 is injected into the contact heat exchange unit 200. The contact heat exchange unit 200 passes through the interior of the high temperature sludge pipes 210 and 220 in which the hot sludge rotates, and makes contact with the low temperature sludge to the outer surface of the high temperature sludge pipes 210 and 220 so that the low temperature sludge and the high temperature sludge are heated. The sludge is mutually heat exchanged. At this time, the cold sludge is supplied to the contact heat exchange unit 200 by the pressure injection unit 270.

On the other hand, the steam heat exchange unit 300 may be connected in series in plurality to increase the heat exchange efficiency between the cold sludge and the hot sludge. Likewise, a plurality of contact heat exchange units 200 may be connected in series. Since the heat exchange units 200 and 300 are connected in series, the heat exchange of the hot sludge and the cold sludge may be repeated several times, thereby maximizing the reuse of thermal energy, thereby efficiently increasing the temperature of the cold sludge.

On the other hand, the hot sludge is hydrolyzed is discharged from the contact heat exchange unit 200, and then separated by the solid-liquid separator 610 into a solid concentrate and a liquid component by gravity. The solid concentrate is separated into a solid component and a liquid component using a conventional dehydrator 620 such as a filter press or a centrifugal dehydrator. The liquid component discharged from the solid-liquid separator 610 and the liquid component discharged from the dehydrator 620 may be subjected to anaerobic digestion (650) to obtain methane gas, and the digested liquid is again treated with aerobic microorganisms to make clean water and then discharged. The sludge produced in this process is sent back to the hydrolysis unit for hydrolysis. In addition, the solids discharged from the dehydrator 620 are pyrolyzed 640 in a high-temperature environment without oxygen, and are made of gas and carbides to be energy resources.

The sludge hydrolysis apparatus according to the present invention is not limited to the above description, and may be composed of only the heating unit 400 and the pressure injection unit 420. In addition, only one of the steam heat exchange unit 300 and the contact heat exchange unit 200 may be used as the heat exchange unit. That is, the sludge hydrolysis apparatus may be composed of only the heating unit 400 and the contact heat exchange unit 200, or may consist only of the heating unit 400 and the steam heat exchange unit 300.

When the sludge hydrolysis device is composed of only the heating unit 400 and the contact heat exchange unit 200, the cold sludge discharged from the contact heat exchange unit 200 is immediately injected into the heating unit 400, and the heating unit 400 is applied. The hot sludge discharged from) is immediately injected into the contact heat exchange unit 200.

On the other hand, when the sludge hydrolysis device is composed only of the heating unit 400 and the steam heat exchange unit 300, the low temperature sludge discharged from the steam heat exchange unit 300 is injected into the heating unit 400, the heating unit ( The hot sludge discharged from 400 is injected into the steam heat exchange unit 300, cooled by heat exchange with the cold sludge, and then discharged into the organic sludge storage tank 100.

Such configurations will be readily apparent to those skilled in the art upon reading this specification.

3, an embodiment of a heating unit 400 according to the present invention will be described.

The heating unit 400 includes a hydrolysis vessel 450 which is hydrolyzed by contact with the water vapor in a space filled with the introduced sludge, and a discharge container 440 which forms a passage through which the hydrolyzed sludge is discharged. And a partition wall 453 installed to distinguish the hydrolysis vessel 450 and the discharge vessel 440.

The hydrolysis vessel 450 is separated from the discharge vessel 440 by the partition wall 453. The cold sludge injected through the inlet 401 is hydrolyzed while mixing and heating with water vapor, and is converted into hot sludge with good fluidity, thereby filling the lower portion of the hydrolysis vessel 450. The hydrolyzed hot sludge in the same amount as the cold sludge injected thereafter flows into the discharge vessel 440 beyond the partition 453 and is "continuously" injected and discharged.

Water vapor having a pressure higher than the vapor pressure of the hydrolysis temperature is supplied to the hydrolysis vessel 450 through the steam injection portion 482, which vaporizes the internal space by heating all internal devices including the vessels 450, 440. Filled up.

A sludge inlet 401 is formed at the inlet of the hydrolysis vessel 450, and a pressurized injection unit 420 for injecting sludge into the hydrolysis vessel 450 is formed at the sludge inlet 401. It is provided. The pressure injection unit 420 presses and injects the cold sludge at a pressure higher than the internal pressure of the hydrolysis vessel 450 in order to inject the cold sludge into the hydrolysis vessel 450 filled with steam of high temperature and high pressure.

The pressurized injection unit 420 includes injection means for preventing suction pressure from occurring in the cold sludge, and pressurizing means for pressurizing the sludge via the injection means, as shown in FIGS. 4 (a) and 4 (b). (423). Of course, a separate sludge pump for transferring the cold sludge to the pressure injection unit 420 may be included.

The injection means has a case 421 having an inlet 421b for allowing the sludge to flow downward by its own load and an outlet 421a for discharging the sludge, and an inlet rotating while being installed inside the case 421 and engaging with each other. And a pair of rotors 422 for pushing the sludge introduced from 421b toward the outlet 421a.

Here, since the inlet 421b is wide, even the low-temperature sludge having poor fluidity, the sludge's own load has a greater force than the sludge's viscous resistance. Therefore, even low temperature sludge having poor fluidity is moved downward by the self load of the sludge.

Two rotating bodies 422 may be provided to form a pair, and each of the rotating bodies 422 is gear-coupled with each other so as to rotate in the inner center direction of the case 421. The rotating body 421 may be made of a rubber material having a high elastic force so that the low temperature sludge can move more smoothly.

It is preferable that the pressing means 423 is provided below the injection means, and the pressing means 423 may be formed of a gear pump or a mono pump. The drive motor 425 transmits a driving force to the pressing means 423 and the rotating body 422.

Here, the upper portion of the pressing means 423 is connected to the lower side of the outlet 421a, the pressure discharge portion 423a is provided on one side of the pressing means 423. The pressurized discharge part 423a is connected to the sludge inlet 401. Accordingly, the low temperature sludge discharged from the low temperature heat exchange vessel 310 is supplied into the hydrolysis vessel 450 by the pressure injection unit 420.

In the process of injecting low-temperature sludge having poor fluidity by the injection means, suction pressure is not generated, and the low-pressure sludge can be smoothly and easily injected in one direction by the pressurizing means 423.

In addition, the interior of the hydrolysis vessel 450 is divided into a sludge space 451b and a water vapor space 451a by the partition 453 and gravity. The steam space 451a is positioned above the sludge space 451b. The cold sludge injected into the hydrolysis vessel 450 is contained in the sludge space 451b and steam is accommodated in the steam space 451a.

The upper surface of the sludge accommodated in the sludge space 451b keeps in contact with water vapor to maintain the temperature of the sludge, and when the height of the sludge becomes higher than the partition 453, the sludge flows over the partition 453 to the discharge container 440. .

The hydrolysis vessel 450 may be provided as one cylindrical tube, but may be installed by connecting two cylindrical tubes horizontally to each other in order to increase the section in which the sludge is hydrolyzed or shorten the length of the hydrolysis vessel.

Preferably, the stirring member 455 is installed inside the hydrolysis vessel 450. The stirring member 455 stirs and mixes the sludge while reciprocating the sludge space 451b and the steam space 451a, and is heated by steam condensation in the steam space 451a to store thermal energy and then heat the sludge space 451b. It discharges the sludge and moves the sludge toward the discharge container 440.

As a result, the sludge inside the hydrolysis vessel 450 comes into contact with the water vapor and is heated by the heat of condensation of the water vapor to be hydrolyzed. That is, the heat of condensation generated by condensation of water vapor in a large area such as the surface of the sludge or the stirring member 455 and the hydrolysis vessel 450 causes the sludge to be hydrolyzed at a high speed.

The hydrolyzed sludge is conveyed toward the partition 453 by gravity and the stirring member 455 in the state of improved fluidity. Thereafter, when the sludge is higher than the partition 453, the sludge flows into the discharge container 440 beyond the partition 453. The sludge in the hydrolysis vessel 450 is automatically transferred to the discharge vessel 440 by the partition 453, so that the sludge can be continuously injected, heated, and discharged.

In addition, the hydrolysis vessel 450 is provided with a pressure sensor 457 capable of measuring the water vapor pressure inside the hydrolysis vessel 450. Of course, the pressure sensor 457 may be installed in the discharge container 440. In addition, the discharge vessel 440 is provided with a water level sensor 447 for measuring the level of sludge. Further, a sludge discharge part 481 is provided at the lower end of the discharge container 440 to adjust the discharge of the sludge. The sludge discharge portion 481 may be configured as a valve.

The heating unit 400 is provided with a control member (not shown) for controlling the amount of water vapor flowing into the hydrolysis vessel 450 by controlling the water vapor injection unit 482 based on the measured value measured by the pressure sensor 457. . Specifically, the control member controls the supply amount of the steam to maintain a constant internal pressure of the hydrolysis vessel (450).

Since the discharge vessel 440 and the hydrolysis vessel 450 are in communication with each other, the steam moves freely through the discharge vessel 440 and the hydrolysis vessel 450. Therefore, the steam inlet 482 may be installed at any one of the hydrolysis vessel 450 and the discharge vessel 440.

In addition, the control member controls the sludge discharge unit 481 based on the measured value measured by the water level sensor 447 to adjust the discharge of the sludge. In addition, the control member may adjust the injection amount of the sludge injected into the hydrolysis vessel 450 based on the measured value measured by the water level sensor 447.

On the other hand, the heating unit is not limited to the above embodiment can be modified. For example, the heating unit may directly discharge the hot sludge from the hydrolysis vessel 450 without the discharge vessel 440. In this case, the discharge of the hot sludge can be controlled using a valve or the like provided at the outlet. If the sludge hydrolysis apparatus does not include the steam heat exchange unit 300 but only the heating unit and the contact heat exchange unit 200a, a valve installed at the hot sludge discharge port of the contact heat exchange unit 200a may be used. To control the hot sludge discharge from the heating unit.

In addition, a portion of the hot sludge contained in the hydrolysis vessel 450 may be moved to the sludge inlet 401 and then injected into the hydrolysis vessel 450 through the sludge inlet 401 together with the low temperature sludge. That is, a portion of the hot sludge contained in the hydrolysis vessel 450 is moved to the sludge inlet 401 by using the pipe 490 and the pump 491 connecting the hydrolysis vessel 450 and the sludge inlet 401. Then, when the low-temperature sludge is injected into the hydrolysis vessel 450 through the sludge inlet 401, the low-temperature sludge is injected into the hydrolysis vessel 450 while the temperature and fluidity of the injected low-temperature sludge are increased to increase the efficiency of hydrolysis. Can be.

The steam heat exchange unit 300 generates steam from the hot sludge to cool the hot sludge, and heats the low temperature sludge using the generated steam. As shown in FIGS. 5 and 6, the steam heat exchange unit 300 communicates the low temperature heat exchange vessel 310, the high temperature heat exchange vessel 350, and the high temperature heat exchange vessel 350 and the low temperature heat exchange vessel 310. The unit 340 is included. The interior of the heat exchange vessels 310 and 350 and the communicating portion 340 is filled with steam that maintains the temperature and pressure on the vapor pressure curve of the cooled hot sludge.

The high temperature heat exchange container 350 includes a high temperature sludge injecting unit 360, a container body 351, and a high temperature sludge discharge unit 370.

The hot sludge injection part 360 is provided in the injection hole 352 to adjust the injection amount of the hot sludge injected through the injection hole 352. The high temperature sludge injection unit 360 may control the internal pressure of the high temperature heat exchange container 350 by adjusting the opening and closing degree of the ball valve.

As shown in FIG. 7, the ball valve has a worm gear 361 rotated by a driving force transmitted from a driving motor (not shown), a worm wheel gear 362 engaged with the worm gear 361, and a worm wheel gear 362. It is preferable to include a ball 365 connected to the injection hole 352 to adjust the injection cross-sectional area. The ball 365 has a spherical shape and a through hole 366 is formed at the center thereof and is connected by the worm wheel gear 362 and the connecting rod 367. When the driving motor is operated, the ball 365 rotates. When the through hole 366 and the injection hole 352 are aligned in a line, hot sludge can be injected through the injection hole 352 and the through hole 366 and the injection hole ( When the 352 is 90 degrees, the injection hole 352 is blocked and hot sludge cannot be injected. Therefore, the amount of sludge passing through the opening 366 and the injection hole 352 may be adjusted by changing the area to pass therethrough.

The hot sludge injected by the hot sludge injection unit 360 is cooled at a high speed while hot steam is instantaneously generated by a difference between a vapor pressure thereof and an internal pressure of the high temperature heat exchange vessel 350.

The high temperature water vapor generated in the high temperature heat exchange vessel 350 moves to the low temperature heat exchange vessel 310 through the communicating portion 340, contacts with the low temperature sludge conveyed from the low temperature heat exchange vessel 310, and rapidly changes into water. . The amount of steam generated in the high temperature heat exchange vessel 350 and the amount of water vapor condensation used in the low temperature heat exchange vessel 310 are balanced so that the internal pressure of the vessels 310 and 350 is kept constant.

On the other hand, the hot sludge cooled while passing through the container body 351 is discharged to the outside through the outlet 357. The hot sludge discharge part 370 controls the discharge of the hot sludge, and has the same structure as the hot sludge injection part 360. Therefore, the high temperature sludge discharge part 370 may control whether the hot sludge is discharged and the discharge amount by adjusting the opening and closing degree of the ball valve.

Preferably, the hot sludge injection unit 360 and the hot sludge discharge unit 370 are controlled by the control member. The control member receives a signal from a pressure sensor (not shown) for detecting the pressure in the high temperature heat exchange vessel 350 and a water level sensor (not shown) for detecting the level of the hot sludge, so that the hot sludge injection unit 360 and the hot sludge The discharge unit 370 is controlled. Since the control member controls the high temperature sludge injection unit 360 and the high temperature sludge discharge unit 370, the pressure inside the container body 351 may be kept constant.

As such, the pressure difference between the pressure (high pressure) of the hot sludge continuously injected into the high temperature heat exchange container 350 and the internal pressure (low pressure) of the container 355 by continuously maintaining the internal pressure of the high temperature heat exchange container 350 are maintained. Water vapor may be generated continuously in the hot sludge injected by.

The steam produced while the high temperature sludge is cooled is moved to the low temperature heat exchange vessel 310 through the communicating portion 340. The water vapor transferred to the low temperature heat exchange vessel 310 contacts the low temperature sludge and rapidly condenses to change into water. The internal pressure of 310 and 350 is kept constant.

As a method of condensing the water vapor in the low temperature heat exchange vessel 310, filling the water vapor into the vessel 310 first, injecting the low temperature sludge into the water vapor, and the low temperature sludge is moved by the low temperature sludge transfer unit 330 to be in contact with the water vapor. There are two types of sludge injection method for condensing water vapor and steam injection method for filling the vessel 310 with cold sludge first and injecting water vapor into the cold sludge to condense the water vapor.

First, in the sludge injection method, the low temperature heat exchange container 310 is a pressurized injection unit 380 connected to the first injection hole 311, a distribution member 320 dispersing the injected low temperature sludge, and a lower side of the distribution member 320. It is installed in the cold sludge transport unit for transporting the cold sludge down 330, and the cold sludge discharge unit 390 connected to the outlet 318. Since the pressure injection unit 380 and the cold sludge discharge unit 390 have substantially the same configuration as the pressure injection unit 420 described above, the description of the pressure injection unit 380 and the cold sludge discharge unit 390 is described here. Will be omitted.

The distribution member 320 disperses the low temperature sludge thinly so that the low temperature sludge can be mixed with the water vapor and supplies it to the low temperature sludge transport unit 330.

Dispensing member 320 is connected to the fixed injection tube 312, the fixed injection tube 312 is injected into the cold sludge, the rotating distribution tank 325, connecting the fixed injection tube 312 and the distribution tank 325 Connection portion 313 for, and the nozzle 326 is installed in a position spaced apart from the central axis of the distribution tank 325.

The fixed injection pipe 312 communicates with the pressure discharge port of the pressure injection unit 380. Therefore, the cold sludge flows in through the fixed injection tube 312. Sludge passing through the fixed injection pipe 312 is introduced into the distribution tank (325). The cold sludge introduced into the distribution tank 325 is discharged to the cold sludge conveying unit 330 by the nozzle 326.

At this time, the connection portion 313, for example, a rotary joint connects the fixed fixed injection tube 312 and the rotating distribution tank 325. On the outer circumferential surface of the connecting portion 313, a worm wheel gear for rotating the distribution tank 325 is formed. The worm wheel gear is rotated by the worm gear 314. Therefore, when the connection portion 313 is rotated by the worm gear 314 and the worm wheel gear, the distribution tank 325 is rotated, so that the low temperature sludge can be evenly distributed.

As shown in FIGS. 6 and 8, the low temperature sludge conveying unit 330 includes a first rotating body 331 and a low temperature sludge container for conveying the low temperature sludge downward while pulling the sludge in the center direction of the container 310. And a second rotating body 335 for moving downward while being pushed in the inner wall direction of the 310, and a rotating shaft 339 for rotating the first rotating body 331 and the second rotating body 335.

The first rotating body 331 is fixed to the inner surface of the container 310 and is rotated on the rotating shaft 339 on the first pedestal 332 and the upper surface of the first pedestal 332, the first discharge port 334 is formed in the center It is installed so as to include a first rotary blade 333 formed to draw the cold sludge toward the first discharge port 334.

The second rotating body 335 is fixed to the inner surface of the container 310 and the second pedestal 336 having a second discharge port 338 formed on the outer portion thereof, and the rotating shaft 339 on the upper surface of the second pedestal 336. It is rotatably installed and includes a second rotary blade 337 formed to push the cold sludge to the second discharge port 338. A plurality of first rotating bodies 331 and second rotating bodies 335 are alternately formed to form a layer.

The first rotary blade 333 and the second rotary blade 337 are rotated in the same direction by the same rotary shaft 339, but are the bent direction of the blades 333, 337. In addition, the rotation shaft 339 is connected to the lower surface of the distribution member 320 to rotate together with the distribution member 320.

Looking at the flow of cold sludge in the low temperature heat exchange vessel 310, the cold sludge is injected through the injection port 311 by the pressure injection unit 380, after which the cold sludge is distributed through the distribution member 320 and the cold sludge It is transported while being agitated by the transfer unit 330, and is heated by the condensation of water vapor in contact during the stirring and transfer, and then discharged through the low temperature sludge discharge unit 390.

On the other hand, the steam heat exchange unit 300 according to the present invention may be arranged such that a plurality of steam heat exchange unit 300 is connected in series to increase the heat efficiency by making the heat exchange temperature in several stages. Since a plurality of steam heat exchange units 300 are arranged in series, heat exchange between the hot sludge and the cold sludge may be repeated, and thus, required for hydrolysis of the cold sludge in the heating unit 400 for heating and hydrolyzing the cold sludge. The supply of thermal energy can be significantly reduced.

Then, the operation of the steam heat exchange unit 300 will be described.

The hot sludge injected into the high temperature heat exchange vessel 350 through the inlet 352 is cooled while generating steam due to the pressure difference. The water vapor is moved to the low temperature heat exchange vessel 310 through the communicating portion 340.

The cooled hot sludge is discharged to the contact heat exchange unit 200 through the hot sludge discharge unit 370 or moved to the inlet 352 of the other steam heat exchange unit 300.

On the other hand, the cold sludge is injected through the injection hole 311 and dispersed by the distribution member 320, it is moved down by the cold sludge transport unit 330.

The distribution member 320 allows the low temperature sludge to be evenly distributed to the low temperature sludge transport unit 330. The first and second rotating bodies 331 and 335 of the low temperature sludge transport unit 330 may stir the low temperature sludge so that the water vapor and the low temperature sludge contact each other.

The cold sludge moved downward while being heated by steam is discharged to the heating unit 400 by the cold sludge discharge unit 390 or moved to the inlet 311 of the other steam type heat exchange unit 300.

Figure 9 is a perspective view showing a second embodiment of the steam heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention. The steam heat exchange unit 300a uses a steam injection method.

The steam heat exchange unit 300a includes a high temperature heat exchanger container 350a through which hot sludge flows in and stored therein, and a low temperature heat exchanger container 310a in which a stirring member for stirring and storing the low temperature sludge is introduced therein. And a communicating unit for supplying the water vapor of the high temperature heat exchange vessel 350a to the low temperature heat exchange vessel 310a.

The high temperature heat exchange container 350a is installed in the container body 351a, the high temperature sludge supply pipe 352a for supplying the hot sludge to the container body 351a, and the high temperature sludge supply pipe 352a to control the supply of the hot sludge. A sludge injection unit 360a and a high temperature sludge discharge pipe 357a for discharging hot sludge from the container body 351a are provided. Since the high temperature sludge injection unit 360a has the same configuration as the above-described high temperature sludge injection unit 360, a detailed description thereof will be omitted.

On the other hand, when a plurality of steam heat exchange unit (300a) is connected in series as shown in FIG. 10, the hot sludge supply pipe (352a) is connected to the hot sludge discharge pipe (357a) of the neighboring steam heat exchange unit (300a) or heated It is connected to the unit 400, the hot sludge discharge pipe (357a) is connected to the hot sludge supply pipe (352a) of another neighboring steam heat exchange unit (300a) or the contact heat exchange unit (200).

The hot sludge discharged from the heating unit 400 is supplied to the container body 351a through the hot sludge supply pipe 352a. At this time, due to the difference between the high pressure of the hot sludge and the internal pressure of the container body 351a, the hot sludge is cooled while generating steam. The water vapor is supplied to the low temperature heat exchange vessel 310a via the communicating portion.

Preferably, the container body 351a is provided with a water level sensor (not shown) for measuring the level of hot sludge, and a pressure sensor (not shown) for measuring the pressure. The water level sensor transmits a signal to a control member (not shown) when the water level of the hot sludge reaches a predetermined height in the container body 351a, and the control member discharges the hot sludge by opening the valve of the hot sludge discharge pipe 357a. do. The discharged hot sludge is moved to the contact heat exchange unit 200. Meanwhile, the high temperature sludge discharged when a plurality of steam heat exchange units 300a are connected in series moves to a hot sludge supply pipe 352a of a neighboring steam heat exchange unit 300a or to a contact heat exchange unit 200. do.

The pressure sensor reduces or stops the inflow of high temperature sludge by adjusting the opening and closing degree of the hot sludge injection part 360a when the internal pressure of the container body 351a is high, and high temperature sludge when the internal pressure of the container body 351a is low. The inflow of the hot sludge is increased by adjusting the opening and closing degree of the injection part 360a. In the steam injection method, since the pressure of the generated steam must be higher than the pressure of the cold sludge container 310 to condense, the internal pressure of the hot container is controlled to maintain the vapor pressure of the hot container corresponding to the pressure required for steam injection.

The low temperature heat exchange vessel 310a is a vessel body 312a, a pressure regulating auxiliary vessel 319a for maintaining a low temperature sludge pressure of the vessel body 312a and providing a compression space for the cold sludge required for steam injection, and a vessel body ( And a low temperature sludge supply pipe 311a for supplying the low temperature sludge to the 312a), and a low temperature sludge discharge tube 318a for discharging the low temperature sludge from the container body 312a. The low temperature sludge supply pipe 311a may be provided with a pressure pump 380a for pressurizing the low temperature sludge for injection of the low temperature sludge.

The container body 312a is filled with cold sludge, and the water vapor is injected into the cold sludge contained in the container body 312a by the nozzle 320a. The low temperature sludge may be rapidly heated by increasing the amount of the nozzle 320a to increase the contact area between the injected steam and the sludge, and stirring the inside to increase the mixing speed.

The stirring member is rotated by the driving motor 315a to stir the cold sludge while reciprocating the cold sludge space and the steam space.

On the other hand, when a plurality of steam heat exchange unit (300a) is connected in series as shown in Figure 10, the cold sludge supply pipe (311a) is connected to or contact with the cold sludge discharge pipe (318a) of the neighboring steam heat exchange unit (300a) It is connected to the heat exchange unit 200, the cold sludge discharge pipe (318a) is connected to the cold sludge supply pipe (311a) of another neighboring steam heat exchange unit (300a) or connected to the heating unit (400).

The communicating unit includes a connecting pipe 340a for connecting the container bodies 351a and 312a to each other, and a nozzle 320a installed at the predetermined intervals at the connecting pipe 340a to spray water vapor into the container body 312a. do. The connecting pipe 340a may be provided with an opening / closing valve 341a for opening and closing the connecting pipe 340a, and a control valve 342a for controlling a supply amount of steam.

The pressure regulating auxiliary container 319a has a diaphragm in its inner space, and compressed air is filled inside the diaphragm. The diaphragm may be moved by sliding according to the internal pressure of the container body 312a. That is, the diaphragm buffers a change in the internal pressure of the container body 312a generated due to the inflow or discharge of water vapor into the container body 312a. In other words, when the internal pressure of the container body 312a increases in the process of securing a space for the water vapor to be introduced, the diaphragm moves to the inside of the pressure regulating auxiliary container 319a to buffer the increase in the internal pressure.

Then, the operation of the steam heat exchange unit 300a will be described.

The hot sludge discharged from the heating unit 400 is injected into the container body 351a through the hot sludge supply pipe 352a. At this time, the hot sludge injection unit 360a controls the injection and injection amount of the hot sludge. The hot sludge injection unit 360a adjusts the injection and injection amount of the hot sludge according to the signals transmitted from the pressure sensor and the water level sensor.

The hot sludge injected into the container body 351a is cooled while generating steam due to the pressure difference, and the generated steam is injected into the low temperature sludge of the container body 312a through the connection pipe 340a and the nozzle 320a. do. The cooled hot sludge is discharged through the hot sludge discharge pipe 357a when the predetermined temperature is reached. The discharged hot sludge is moved to the neighboring steam heat exchange unit 300a or the contact heat exchange unit 200.

Meanwhile, the low temperature sludge is injected into the container body 312a through the low temperature sludge supply pipe 311a. At this time, since the low temperature sludge has poor fluidity, it is preferable to use the pressure pump 380a. The cold sludge injected into the container body 312a is heated while being in contact with water vapor. The stirring member stirs the cold sludge so that the cold sludge is heated quickly. The cold sludge heated by the steam contact heating is discharged through the cold sludge discharge pipe 318a. The discharged low temperature sludge is moved to a neighboring neighboring steam heat exchange unit 300a or to a heating unit 400.

On the other hand, the steam heat exchange unit 300, 300a according to the present invention is not limited to the first and second embodiments can be variously modified within the scope that can implement the technical idea of the present invention. For example, in the low temperature sludge transport unit of the first embodiment, one end thereof is installed at a position corresponding to the inlet 311 of the low temperature heat exchange vessel 310, and the other end thereof is disposed with the outlet 318 of the low temperature heat exchange vessel 310. It may include a conveyor belt installed at a corresponding position.

As the cold sludge is transported on the conveyor belt, it comes into contact with water vapor generated from the hot sludge. At this time, the water vapor in contact with the cold sludge is condensed, the temperature of the cold sludge is increased due to the condensation of the steam. The hot sludge is cooled due to the generation of steam, and the cold sludge is heated by the heat of condensation of the steam.

11 to 14 show a first embodiment of a contact heat exchange unit.

The contact heat exchange unit 200 includes a rotating high temperature sludge tube through which the hydrolyzed hot sludge moves, and a low temperature sludge moving unit through which the low temperature sludge to be hydrolyzed moves.

The high temperature sludge tube includes first and second high temperature sludge tubes 210a and 220a and rotation means for rotating the first and second high temperature sludge tubes 210a and 220a. The hot sludge may be discharged from the steam type heat exchange unit 300, and in general, when discharged at a high temperature of more than 100 degrees, the high temperature sludge is injected at its own pressure by a high vapor pressure, and when the temperature is low, it is injected into the injection pump 219a. By the first and second high temperature sludge pipes 210a and 220a, respectively.

First and second protrusions 211a and 221a are formed on the outer surfaces of the first and second high temperature sludge pipes 210a and 220a, and the first and second high temperature sludge pipes 210a and 220a are first and second. The protrusions 211a and 221a may rotate while being engaged with each other. The first and second high temperature sludge tubes 210a and 220a are preferably made of a metal having good thermal conductivity.

The first and second protrusions 211a and 221a accommodate the low temperature sludge between the first and second protrusions 211a and 221a when the first and second high temperature sludge pipes 210a and 220a are rotated. The cold sludge is heated in one state and effectively moved from the cold sludge inlet 261a toward the outlet 262a. Where the first and second high temperature sludge tubes 210a and 220a meet each other, the first and second protrusions 211a and 221a are engaged with each other, and in this process, the first and second protrusions 211a and 221a are engaged. When the cold sludge accommodated between the first protrusion 211a and the low temperature sludge accommodated between the second protrusion 221a is pushed out in the discharge direction, the first and second protrusions 211a and 221a are When falling, suction pressure is formed between the first protrusion 211a and the second protrusion 221a so that the low temperature sludge is received between the protrusions 211a and 221a. Through this process, the cold sludge is heated in close contact with the first and second high temperature sludge pipes 210a and 220a between the protrusions 211a and 221a.

Inner walls of the first and second high temperature sludge pipes 210a and 220a are repeatedly formed with recesses and protrusions, which are advantageous for stirring and heat conduction of the high temperature sludge.

The rotating means is respectively provided in the worm wheel gear 240a installed in the first high temperature sludge pipe 210a, the worm gear 242a rotated by the driving motor 241a, and the first and second high temperature sludge 210a and 220a. The engaging gear 243a provided is provided.

Worm gear 242a is installed vertically to rotate a plurality of worm wheel gear (240a) at the same time. The worm gear 242a is rotated by the driving motor 241a, and the worm wheel gear 240a is rotated in engagement with the worm gear 242a to rotate the first high temperature sludge pipe 210a. When the first high temperature sludge tube 121 is rotated, the first and second high temperature sludge tubes 210a and 220a are rotated together by the engagement gear 243a.

When the first and second high temperature sludge pipes 210a and 220a are rotated together, the first and second high temperature sludge pipes 210a and 220a are cooled by the first and second protrusions 211a and 221a from the low temperature sludge inlet 261a via the moving space 264a. It is moved toward the sludge outlet 262a.

Preferably, the upper and lower first high temperature sludge pipes 210a are connected to each other, and the upper and lower second high temperature sludge pipes 220a are connected to each other.

That is, the end of the first high temperature sludge pipe 210a passing through the lower unit member 260a is the end of the first high temperature sludge pipe 210a passing through the upper unit member 260a and the first connection pipe 270a. Are connected to each other.

In addition, an end of the second high temperature sludge pipe 220a passing through the lower unit member 260a may be connected to an end of the second high temperature sludge pipe 220a passing through the upper unit member 260a and the second connection pipe 280a. Are connected to each other.

A rotary joint is installed between the first connection pipe 270a and the first high temperature sludge pipe 210a, and a rotary joint is also installed between the second connection 280a and the second high temperature sludge pipe 220a.

Since the rotary joint is widely used as a device used to connect a rotating tube and a fixed tube to each other, description thereof will be omitted.

As such, since the upper and lower first high temperature sludge tubes 210a are connected to each other, and the upper and lower second high temperature sludge tubes 220a are connected to each other, the high temperature sludge injected by the injection pump 219a is It is moved from the bottom up. The high temperature sludge discharged from the first and second high temperature sludge tubes 210a and 220a at the uppermost stage is moved to the solid-liquid separator 610.

The low temperature sludge moving unit includes a plurality of unit members 260a stacked vertically, and the unit member 260a includes a low temperature sludge inlet 261a, a low temperature sludge outlet 262a, and a moving space 264a.

A space is formed inside the unit member 260a, and the first and second high temperature sludge pipes 210a and 220a are installed in the space. Low temperature sludge is introduced through the cold sludge inlet 261a, and heated cold sludge is discharged through the cold sludge outlet 262a.

The contact type heat exchange unit 200a is a unit for thermally contacting heat-exchanging sludge having a high viscosity at a temperature of less than 100 degrees (ie, less than 1 atm). 2, the contact heat exchange occurs between the hot sludge and the low temperature sludge inside the first and second high temperature sludge pipes 210a and 220a while moving using the protrusions 211a and 221a.

The cold sludge inlet 261a is connected to the cold sludge outlet 262a of the unit member 260a installed on the upper side, and the cold sludge outlet 262a is connected to the cold sludge inlet 261a of the unit member 260a installed on the lower side. The low temperature sludge introduced through the low temperature sludge inlet 261a is heated by the first and second high temperature sludge pipes 210a and 220a while being moved to the low temperature sludge outlet 262a via the moving space 264a.

The moving space 264a is a narrow gap between the inner wall of the unit member 260a and the first high temperature sludge tube 210a and a narrow gap between the inner wall of the unit member 260a and the second high temperature sludge tube 220a. The cold sludge becomes thinner while passing through the narrow gap, so that even cold sludge with poor heat transfer can be sufficiently heated.

After the low temperature sludge is supplied from the organic sludge storage tank 100, the low temperature sludge is introduced through the low temperature sludge inlet 261a of the unit member 260a located at the top thereof. Subsequently, the low temperature sludge is heated by heat exchange via the moving space 264a and the low temperature sludge discharge port 262a, and moves to the unit unit 260a below.

The cold sludge discharged through the cold sludge discharge port 262a of the lowermost unit member 260a is moved to the steam heat exchange unit 300 by the discharge pump 290a.

As described above, the hot sludge is injected from the lowermost first and second high temperature sludge tubes 210a and 220a and then discharged from the uppermost first and second high temperature sludge tubes 210a and 220a while being cooled step by step. The cold sludge is preferably injected from the uppermost unit member 126 and then discharged through the lowermost unit member 126 while being heated step by step. Because it can be moved.

In addition, when the hot sludge and the low temperature sludge move in opposite directions, heat exchange may be performed well because the temperature difference required for the heat exchange may be kept constant.

Then, the operation of the contact heat exchange unit 200a will be described.

The high temperature sludge is injected into the first and second high temperature sludge tubes 210a and 220a at the lowermost stage by the injection pump 219a, respectively. The hot sludge is discharged from the steam heat exchange unit 300. If a plurality of contact heat exchange units 200a are connected in series, the high temperature sludge is discharged from another contact heat exchange unit 200a or from a steam heat exchange unit 300.

The first and second high temperature sludge pipes 210a and 220a are rotated by receiving the rotational force of the driving motor 241a. The first and second high temperature sludge pipes 210a and 220a are rotated to engage the first and second protrusions 211a and 221a formed on the outer circumferential surface thereof.

Since the first high temperature sludge tube 210a is connected to the upper first hot sludge tube 210a and the second high temperature sludge tube 220a is connected to the upper second high temperature sludge tube 220a, the high temperature sludge After moving upwards from the bottom, the first hot sludge pipe 210a and the second high temperature sludge pipe 220a at the top are respectively discharged. The high temperature sludge discharged from the first and second high temperature sludge tubes 210a and 220a at the uppermost stage is moved to the solid-liquid separator 610.

While moving through the first and second high temperature sludge pipes 210a and 220a, the hot sludge is cooled by heat exchange with the low temperature sludge outside the first and second high temperature sludge pipes 210a and 220a.

On the other hand, the low temperature sludge is introduced through the inlet 261a of the uppermost unit member 260a and then moved through the moving space 264a to exchange heat with the first and second high temperature sludge pipes 210a and 220a, It moves to the inlet 261a of the lower unit member 260a through the outlet 262a. As described above, when the low temperature sludge is accommodated between the first protrusion 211a and the second protrusion 221a and the first and second protrusions 211a and 221a are engaged with each other, the low temperature sludge is discharged in the discharge direction. Through this process, the cold sludge accommodated between the first protrusions 211a and the second protrusions 221a is heated.

Through such a process, the cold sludge is moved to the lowermost unit member 260a and then discharged by the discharge pump 290a. The discharged cold sludge moves to the steam heat exchange unit 300. If a plurality of contact heat exchange units 200a are connected in series, the low temperature sludge is moved to another contact heat exchange unit 200a or to a steam heat exchange unit 300.

FIG. 15 is a cross sectional view showing a second embodiment of the contact heat exchange unit, and FIG. 16 is a view showing a power transmission configuration for driving the contact heat exchange unit.

The contact heat exchange unit 200b includes a hermetically sealed frame 210b having a low temperature sludge inlet 211b and a low temperature sludge outlet 212b, a pair of first high temperature sludge tubes 220b interlocked with each other, and a pair of A pair of second high temperature sludge tubes 230b that rotate in a direction opposite to the rotation direction of the first high temperature sludge tube 220b is provided. At this time, it is preferable that there is a sufficient distance between the frame 210b and the first high temperature sludge tube 220b and between the frame 220b and the second high temperature sludge tube 220b to allow the low temperature sludge to move freely under pressure. Do.

The frame 210b has a hollow connecting the inlet 211b and the outlet 212b therein along the longitudinal direction. First and second high temperature sludge tubes 220b and 230b are installed in the hollow. Low temperature sludge is introduced through the inlet 211b, and heat exchanges with the first and second high temperature sludge tubes 220b and 230b while moving through the hollow, and is discharged through the outlet 212b. A separate pump (not shown) may be provided for the discharge.

The high temperature sludge is moved into the first and second high temperature sludge tubes 220b and 230b. The pair of first high temperature sludge tubes 220b are rotated such that the protrusions 221b formed on the outer surfaces thereof mesh with each other. In addition, the pair of second high temperature sludge pipes 230b are rotated such that the protrusions 231b formed on the outer surface thereof mesh with each other. Preferably, the pair of first high temperature sludge tubes 220b and the pair of second high temperature sludge tubes 230b are alternately arranged to neighbor each other.

Cold sludge is accommodated in the grooves between the protrusions 221b and the grooves between the protrusions 231b and the low temperature sludge is moved to perform contact heat exchange with the first and second high temperature sludge tubes 220b and 230b. As indicated by arrows 222b and 232b in the drawing, the low-temperature sludge because the direction of rotation of the pair of first high temperature sludge tubes 220b and the direction of rotation of the pair of second high temperature sludge tubes 230b are opposite to each other. High pressure and low pressure will exist. For example, the point indicated by H is a place where the cold sludge is discharged from the groove as the protrusions 221b and 231b are engaged, so the pressure of the cold sludge is relatively high, and the point indicated by the L is the protrusion 221b. As the mesh 231b is engaged, the cold sludge pressure is relatively lower because the cold sludge is accommodated in the groove.

More specifically, the arrow 225b indicates that the cold sludge received and moved in the groove of the protrusion 221b exits from the protrusion 221b as the protrusion 221b is engaged and thus escapes from the groove of the protrusion 221b. The heated, cold sludge coming out is dispersed to the surroundings as shown by arrow 227b, increasing the pressure of the portion. Arrow 235b indicates that the cold sludge that has been received and moved in the groove of the protrusion 231b exits from the protrusion 231b as the protrusion 231b is engaged, and thus the cold sludge that has escaped from the groove of the protrusion 231b is It is distributed around as shown by arrow 237b.

On the contrary, at the point indicated by L where engagement of the protrusions 221b and 231b occurs, the low temperature sludge is received between the grooves of the protrusions 221b and 231b due to the engagement of the protrusions 221b and 231b. Will be lowered. Accordingly, the low temperature sludge inside the frame 210b moves from the high H to the low L, and the low temperature sludge which is not heated in this process is sequentially inserted into the grooves of the protrusions 221b and 231b to perform the circulation movement. Is heated.

The rotation of the first and second high temperature sludge tubes 220b and 230b may be achieved by installing a driving motor in each of the first high temperature sludge tube 220b and the second high temperature sludge tube 230b, but shown in FIG. As described above, the sprockets 225b and 235b connected to the first and second high temperature sludge tubes 220b and 230b may be rotated together using the chain 250b. That is, the sprocket 225b is connected to the first high temperature sludge tube 220b and the sprocket 235b is connected to the second high temperature sludge tube 230b using the chain 250b and the driving sprocket 252b. The sprockets 225b and 235b may be rotated at once.

As described above, since the high pressure H and the low pressure L of the low temperature sludge are repeatedly present, the low temperature sludge is circulated and agitated to heat the first and second high temperature sludge pipes 220b and 230b to be heated. do. The cold sludge introduced through the inlet 211b is discharged by being moved to the outlet 212b while performing the heat exchange, and controlling the discharge and residence time through the outlet 212b by adjusting the inflow of the cold sludge through the inlet 211b. do. In particular, increasing the rotational speed of the hot sludge tubes 220b and 230b increases the circulation of the cold sludge and increases the number of times of heat exchange in the grooves of the hot sludge tubes 220b and 230b, thereby increasing the length of the frame 210b. Even if short, heat exchange can be made sufficiently.

The high temperature sludge pipes 220b and 230b are preferably connected to each other. Accordingly, the end of the lower hot sludge tube is connected to the end of the upper hot sludge tube. As described above, the connection may be made by the first and second connection pipes 270a and 280a and the rotary joint. By the connection, the hot sludge is injected into the lowermost hot sludge tube and then moved to the uppermost hot sludge tube and discharged.

At this time, the valve is installed at the outlet 212b through which the hot sludge is discharged, and the opening and closing amount of the valve is adjusted to discharge the hot sludge while maintaining a high pressure inside the hot sludge tube.

Meanwhile, the case where the contact heat exchange unit 200b is installed vertically is described above, but the contact heat exchange unit 200b may be installed horizontally. The construction of the contact heat exchange unit 200b horizontally installed will be apparent to those skilled in the art with reference to the above description, and thus description thereof will be omitted.

Then, the operation of the contact heat exchange unit 200b will be described.

The hot sludge is injected into the lowest hot sludge tube. The hot sludge is discharged from the steam heat exchange unit 300. If a plurality of contact heat exchange units 200b are connected in series, the hot sludge is discharged from another contact heat exchange unit 200b or from a steam heat exchange unit 300.

The first and second high temperature sludge tubes 220b and 230b are rotated by receiving the rotational force of the driving sprocket 252b. The pair of first high temperature sludge tubes 220b is rotated so that the protrusions 221b formed on the outer circumferential surface are engaged with each other, and the pair of second high temperature sludge tubes 230b is rotated so that the protrusions 231b formed on the outer circumferential surface are engaged with each other. do.

Meanwhile, the low temperature sludge is heated in heat exchange with the first and second high temperature sludge tubes 220b and 230b while being accommodated and moved in the groove between the protrusions 221b and the groove between the protrusions 231b. The hot sludge inside the sludge tubes 220b and 230b is cooled.

The pair of first high temperature sludge tubes 220b and the pair of second high temperature sludge tubes 230b rotate in opposite directions, and the pair of first high temperature sludge tubes 220b and the pair of second high temperature sludge tubes 220b are rotated in opposite directions. 230b are alternately arranged.

Where the projections 221b are engaged with each other, since the cold sludge stored in the grooves is discharged, the pressure of the cold sludge becomes relatively high, and where the engagement of the projections 221b occurs, the cold sludges flow into the grooves so that the cold sludges are introduced. Pressure is relatively low.

That is, when the pair of protrusions 221b rotate while being engaged with each other, the cold sludge that is received and moved in the groove of the protrusion 221b moves in the same direction as the arrows 225b and 227b, and the pair of protrusions 231b is moved. When rotated while being engaged with each other, the cold sludge received and moved in the groove of the protrusion 231b moves in the same direction as the arrows 235b and 237b. Accordingly, the inside of the frame 210b has a high pressure H and a low pressure L alternately, and the cold sludge moves to the outlet 212b while repeatedly dispersing and concentrating. 2 Heat exchange with the high temperature sludge tube (220b) (230b).

On the other hand, the low temperature sludge is supplied from the organic sludge storage tank (100). if. When a plurality of contact heat exchange units 200b are connected in series, the low temperature sludge is discharged from another contact heat exchange unit 200b or from the organic sludge storage tank 100.

After the heat exchange, the cold sludge is discharged from the discharge port 212b. The discharged cold sludge is moved to the steam heat exchange unit 300 or to another contact heat exchange unit 200b. A separate discharge pump (not shown) may be provided for the discharge.

On the other hand, Figure 17 is a view showing a third embodiment of the contact heat exchange unit.

The contact heat exchange unit 200c includes a sealed cylindrical frame 210c having a low temperature sludge inlet 211c and a low temperature sludge outlet 212c, and a pair of first high temperature sludge tubes 220c and 221c which rotate in engagement with each other. And a pair of second high temperature sludge tubes 230c and 231c which rotate in a direction opposite to the rotation direction of the pair of first high temperature sludge tubes 220c and 221c. The first and second high temperature sludge tubes 220c, 221c, 230c and 231c are installed along the longitudinal direction of the cylindrical frame 210c inside the cylindrical frame 210c.

The hollow is formed in the cylindrical frame 210c along the longitudinal direction. The cold sludge introduced through the inlet 211c is heat-exchanged with the first and second high temperature sludge pipes 220c, 221c, 230c and 231c while moving along the hollow and then discharged through the outlet 212c. . Since the frame 210c is cylindrical, it can withstand even a high internal pressure. Therefore, the cylindrical frame 210c may be used even when the temperature of the cold sludge is 100 degrees or more.

Protrusions are formed on the outer surfaces of the first high temperature sludge tubes 220c and 221c. As the protrusions engage with each other, the pair of first high temperature sludge tubes 220c and 221c are rotated. As in the above-described embodiment, as the protrusions are engaged with each other, the cold sludge received in the grooves between the protrusions is discharged, and as the engagement of the protrusions is opened, the cold sludge is introduced into the grooves between the protrusions.

One end of the pair of first high temperature sludge tubes 220c and 221c is connected to each other. The connection may be made by a connection pipe 240c and a rotary joint 241c. The rotary joint has been described above.

The hot sludge discharged from the steam heat exchange unit 300 is introduced through the other end of the first high temperature sludge tube 221c, and the other end of the first high temperature sludge tube 220c is the second high temperature sludge tube 230c. ). The connection may also be made by a connection pipe 240c and a rotary joint 241c. Arrows shown in the figure indicate the path through which the hot sludge is moved.

On the other hand, a plurality of contact heat exchange unit 200c may be connected to each other in series, in this case, the hot sludge discharged from the neighboring contact heat exchange unit 200c is connected to the other end of the first high temperature sludge tube 220c. It flows through.

Protrusions are formed on the outer surfaces of the second high temperature sludge tubes 230c and 231c. A pair of second high temperature sludge tubes 230c and 231c are rotated while the protrusions are engaged with each other, and a pair of second high temperature sludge tubes 230c and 231c is a pair of first high temperature sludge tubes 220c and 221c. ) Is rotated in a direction opposite to the direction in which it is rotated. As in the above-described embodiment, as the protrusions are engaged with each other, the cold sludge received in the grooves between the protrusions is discharged, and as the engagement of the protrusions is opened, the cold sludge is introduced into the grooves between the protrusions.

One end of the pair of second high temperature sludge pipes 230c and 231c is connected to each other. The connection can also be made by the connection pipe 240c and the rotary joint. The hot sludge is discharged through the other end of the second high temperature sludge tube 231c. When the plurality of contact heat exchange units 200c are connected to each other in series, the hot sludge discharged through the other end of the second high temperature sludge tube 231c is discharged to the neighboring contact heat exchange unit 200c.

The pair of first high temperature sludge tubes 220c and 221c and the pair of second high temperature sludge tubes 230c and 231c may be rotated by respective driving motors, but the chain 250b and the sprocket 225b may be rotated. 235b and drive sprocket 252b may be used to rotate. This point will be readily apparent to those skilled in the art with reference to FIGS. 19, 20 and 21.

The protrusions of the pair of first high temperature sludge tubes 220c and 221c are engaged with each other and then open, and the protrusions of the pair of second high temperature sludge tubes 230c and 231c are mutually engaged and then open again. When the inside of the cylindrical frame (210c) has a high and low pressure of the low temperature sludge, there is a low temperature sludge is circulated while stirring and the first and second high temperature sludge tube (220c) (221c) (230c) (231c) (231c) ) Is heated by heat exchange.

The contact heat exchange unit 210c may not include a separate moving means for moving the cold sludge. By adjusting the amount of cold sludge introduced through the inlet 211c, the time for which the cold sludge stays in the cylindrical frame 210c and the discharge and residence time through the outlet 212c can be adjusted.

Then, the operation of the contact heat exchange unit 210c will be described.

The hot sludge flows through the other end of the first hot sludge tube 221c and then moves along the path indicated by the arrow. That is, the hot sludge passes through the first high temperature sludge tube 221c, the first high temperature sludge tube 220c, the second high temperature sludge tube 230c, and the second high temperature sludge tube 231c in sequence, and exchanges heat with the low temperature sludge. do.

On the other hand, the low temperature sludge is introduced through the inlet 211c and heat-exchanged with the first and second high temperature sludge tubes 220c, 221c, 230c and 231c, and then is discharged through the outlet 212c. At this time, the protrusions of the pair of first high temperature sludge pipes 220c and 221c are engaged with each other and then open, and the protrusions of the pair of second high temperature sludge pipes 230c and 231c are engaged with each other. What is happening is repeated, and at the same time, when the pair of first high temperature sludge tubes 220c and 221c and the pair of second high temperature sludge tubes 230c and 231c are rotated opposite to each other, the inside of the cylindrical frame 210c has a low temperature. The high and low pressure of the sludge is present, and thus the cold sludge is stirred while being circulated, and is heated by heat exchange with the first and second high temperature sludge tubes 220c, 221c, 230c and 231c.

18 is a view showing a fourth embodiment of the contact heat exchange unit provided in the sludge hydrolysis apparatus according to the present invention. In the figure, both sides of the cylindrical frame 210d are open, but are sealed by a cover (not shown) in actual use.

The contact heat exchange unit 200d includes a cylindrical frame 210d and first and second high temperature sludge tubes 220d and 230d which rotate while being engaged with each other.

The cylindrical frame 210d includes a hollow formed therein, an inlet 211d through which the cold sludge flows, and an outlet 212d through which the cold sludge is discharged. Since the frame 210d is cylindrical, it can be used even when the internal pressure is large. Therefore, the cylindrical frame 210d can be used even when the cold sludge is 100 degrees or more.

The first high temperature sludge tube 220d has a protrusion 221d formed around it. The low temperature sludge is received and moved in the grooves between the protrusions 221d to exchange heat with the first high temperature sludge tube 220d. Arrow 222d indicates the rotation direction of the first high temperature sludge tube 220d.

The second high temperature sludge tube 230d has a protrusion 231d formed around the second hot sludge tube 230d. The low temperature sludge is accommodated and moved in the groove between the protrusions 231d to exchange heat with the second high temperature sludge tube 230d. An arrow 232d indicates a rotation direction of the second hot sludge tube 230d.

 The first and second high temperature sludge tubes 220d and 230d are preferably made of a metal having excellent thermal conductivity.

A hot sludge inlet is formed at one end of the first high temperature sludge tube 220d. The other end of the first high temperature sludge tube 220d communicates with the other end of the second high temperature sludge tube 230d, and a high temperature sludge discharge port is formed at one end of the second high temperature sludge tube 230d. In order to connect the other end of the first high temperature sludge tube 220d and the other end of the second high temperature sludge tube 230d to each other, a connection pipe 270a and a 280a and a rotary joint are used. The connection pipes 270a and 280a and the rotary joint have been described above.

When the protrusions 221d and 231d are engaged with each other, the cold sludge contained in the grooves of the protrusions 221d and 231d is discharged outward, and arrows 223d and 233d indicate that the cold sludge is discharged from the grooves. Where the discharge is made, the pressure of the cold sludge becomes high. The cold sludge discharged from the groove moves outward, with arrows 224d, 234d, 225d and 235d indicating the movement. On the other hand, when the interlocking protrusions 221d and 231d are opened, the cold sludge flows into the grooves of the protrusions 221d and 231d, whereby the pressure of the cold sludge is lowered so that the cold sludge is circulated.

Through this process, the cold sludge is circulated and heated while stirring. Therefore, even if the length of the cylindrical frame 210d is not long, it can be sufficiently heated because the low temperature sludge can stay for a sufficient time by the circulation and stirring.

The heated cold sludge is discharged through the discharge port 212d. Preferably, the discharge through the outlet 212d is adjusted by adjusting the amount of cold sludge introduced through the inlet 211d. That is, the discharge is controlled by adjusting the inflow of the cold sludge through the inlet 211d without using a separate pump (not shown) for discharging the cold sludge.

Then, the operation of the contact heat exchange unit 200d will be described.

Cold sludge is injected through inlet 211d. The low temperature sludge is supplied from the organic sludge storage tank (100). When a plurality of contact heat exchange units 200d are connected in series, the low temperature sludge is supplied from the organic sludge storage tank 100 or discharged from another contact heat exchange unit 200d.

After the hot sludge is injected through the hot sludge inlet, the hot sludge is cooled while sequentially passing through the first hot sludge tube 220d and the second hot sludge tube 230d, and then discharged through the hot sludge outlet.

The first and second high temperature sludge pipes 220d and 230d are cold sludges such as arrows 223d, 233d, 224d, 234d, 225d and 235d because the protrusions 221d and 231d rotate while being engaged with each other. A stream of is formed so that the cold sludge is circulated and stirred.

The cold sludge cooled by the stirring and heat exchange is discharged through the outlet 212d.

The present invention has the following effects.

First, by reusing the heat energy required for hydrolysis through heat exchange while continuously hydrolyzing the sludge, it provides a highly economical sludge treatment technology that significantly reduces fuel costs and does not require a device for cooling the hot sludge.

Second, all odor components contained in the sludge are removed through hydrolysis, so that the sludge treatment facility can be installed without any complaints.

Third, by converting sludge, which is a waste, into an energy source through hydrolysis, renewable energy can be made to replace fossil fuels, which are the cause of global warming.

Fourth, it is possible to replace sludge ocean dumping or land dumping, and to protect the environment by preventing marine pollution and methane emission.

Fifth, the production of a variety of devices such as a heating unit, a steam heat exchange unit, a contact heat exchange unit and a pyrolysis unit and an aerobic fire extinguishing unit of the continuous sludge hydrolysis unit suitable for the sludge treatment technology.

Sixth, by using a pressurized injection unit, by applying high pressure to the low temperature sludge, which is extremely poor in fluidity and heat transfer, the heat transfer can be performed well, and the high pressure of 20 atm generated at 210 degrees, where hydrolysis proceeds effectively. Sludge can be injected into the vessel in the vapor pressure environment, and the sludge heated in the heat exchange unit can be discharged from the vessel.

Claims (26)

1. A heating unit in which the cold sludge is heated by the heated steam and hydrolyzed to discharge the hot sludge; And

   Heat exchange is performed by using a cylindrical tube rotating so that the low temperature sludge and the hot sludge discharged from the heating unit do not mix with each other, and the high temperature sludge passes through the inside of the cylindrical tube and the low temperature sludge passes outside the cylindrical tube. And a heat exchange unit contacting the heat exchanger through heat conduction while contacting the cylindrical tube;

   The low temperature sludge is heated in a contact heat exchange unit and then hydrolyzed in a heating unit, and the high temperature sludge is made in a heating unit and cooled in a contact heat exchange unit, and the sludge hydrolysis apparatus is characterized in that the heating and heat exchange are performed continuously. .
2. The method of claim 1,

   After the low temperature sludge discharged from the contact heat exchange unit is injected and the high temperature sludge discharged from the heating unit is injected, the high temperature sludge is cooled while generating water vapor due to the pressure difference, and the low temperature sludge comes into contact with the water vapor to condense heat of the water vapor. Sludge hydrolysis apparatus further comprising a steam heat exchange unit to be heated by.
3. The method according to claim 1 or 2,

   The contact heat exchange unit,

   The low temperature sludge moving part to which the low temperature sludge moves may be installed to be in contact with the cylindrical tube so that heat of the high temperature sludge may be transferred to the low temperature sludge.

   The cylindrical tube has first and second high temperature sludge tubes,

   The low temperature sludge moving unit includes a plurality of unit members installed to be connected to each other,

   The unit member,

   Inlet through which cold sludge is introduced;

   An outlet through which cold sludge is discharged; And,

   And a moving space formed between the inlet and the outlet and installed with the first and second high temperature sludge pipes.

   The inlet is connected to the outlet of the unit member installed on one side and the outlet is connected to the inlet of the unit member installed on the other side, the cold sludge introduced through the inlet is in contact with the first and second hot sludge pipes while moving to the outlet Sludge hydrolysis apparatus, characterized in that heated by.
4. The method of claim 3,

   A protrusion 211a formed along the longitudinal direction of the first high temperature sludge tube on an outer circumferential surface of the first high temperature sludge tube;

   A protrusion 221a formed along the longitudinal direction of the second high temperature sludge tube on an outer circumferential surface of the second high temperature sludge tube; And

   Includes; Rotating means for rotating the first and second high temperature sludge tube,

   Low temperature sludge is accommodated in the grooves between the protrusions 211a and the grooves between the protrusions 221a to exchange heat with the first and second high temperature sludge tubes, and when the protrusions 211a and 221a are engaged with each other, the low temperature sludge contained in the grooves is Sludge hydrolysis apparatus, characterized in that the cold sludge is introduced into the groove when discharged out of the groove and the engagement is opened.
5. The method according to claim 1 or 2,

   Contact heat exchanger unit,

   A closed frame in which a cold sludge inlet and a cold sludge outlet are formed;

   It includes; and

   The cylindrical tube,

   A first high temperature sludge tube installed in the frame and having high temperature sludge moved therein and having a protrusion 221 d formed on an outer circumferential surface thereof;

   And a second high temperature sludge tube installed in the frame and having high temperature sludge moved therein, and having a protrusion 231b formed at an outer circumferential surface thereof to be engaged with the protrusion 221d.

   The low temperature sludge introduced through the low temperature sludge inlet exchanges heat with the first and second high temperature sludge pipes while being accommodated in the grooves between the protrusions 221d and the grooves between the protrusions 231d, and the low temperature sludge contained in the grooves. When the protrusions 221d and 231d are engaged, they are discharged from the grooves, and when the engagement is opened, the cold sludge flows into the grooves, and the cold sludge is discharged from the grooves and the cold sludge flows into the grooves. Sludge hydrolysis apparatus, characterized in that there is a high and low pressure of the cold sludge.
6. The method of claim 2,

   The steam heat exchange unit includes a high temperature heat exchanger container into which hot sludge is injected, a low temperature heat exchanger container into which low temperature sludge is injected, and a communicating portion communicating the high temperature heat exchanger container and the low temperature heat exchanger container,

   The hot sludge injected from the heating unit is cooled and discharged while generating steam by a relatively low pressure inside the hot heat exchange vessel, and the cold sludge injected into the low temperature heat exchange vessel is heated by contact with the steam. And the water vapor is moved from the high temperature heat exchange vessel to the low temperature heat exchange vessel through a communication unit.
7. The method of claim 6,

   The inside of the low temperature heat exchange vessel further includes a low temperature sludge transfer unit for moving the low temperature sludge to the discharge port,

   Low Temperature Sludge Transfer Unit,

   A first rotating body for transferring the cold sludge downward while drawing the cold sludge toward the center of the cold heat exchange vessel;

   A second rotating body for transferring the cold sludge downward while pushing the cold sludge toward the inner wall of the cold heat exchange vessel; And,

   Sludge hydrolysis apparatus comprising a; rotating shaft for rotating the first and second rotating body.
8. The method of claim 2,

   The steam heat exchange unit,

   A high temperature heat exchange container in which hot sludge is introduced and stored and then discharged;

   A low temperature heat exchange container in which cold sludge is introduced and stored and discharged, and a stirring member for stirring the low temperature sludge is installed; And,

   And a communication unit for supplying steam of the high temperature heat exchanger container to the low temperature heat exchanger container, wherein the low temperature heat exchanger container is filled with low temperature sludge, and the water vapor is injected into the low temperature sludge contained in the low temperature sludge container by a nozzle. Sludge hydrolysis apparatus.
9. The method of claim 1,

   The heating unit has a hydrolysis vessel that is hydrolyzed by contact with the water vapor in a space filled with the introduced sludge with water vapor,

   The hydrolysis vessel is sludge hydrolysis apparatus, characterized in that the sludge containing the sludge space and the steam space filled with the steam filled.
10. The method of claim 1,

    The heating unit,

    A hydrolysis vessel in which the introduced sludge is hydrolyzed by contact with the water vapor in a space filled with water vapor;

    A discharge container forming a passage through which the hydrolyzed sludge is discharged;

    A partition wall separating the hydrolysis vessel and the discharge vessel; And

    A stirring member provided in the hydrolysis vessel;

    The hydrolysis vessel is a sludge space in which the sludge is filled and the water vapor can pass through the inner space of the hydrolysis vessel by allowing the hydrolyzed sludge to flow over the partition wall to the discharge vessel. Compartment into the vapor space,

    The stirring member rotates the sludge space and the steam space, stirs the water vapor and the sludge and simultaneously moves the sludge to the discharge container, wherein the sludge is heated by the steam. .
11.  The method of claim 9 or 10,

    Sludge hydrolysis apparatus, characterized in that the hot sludge contained in the hydrolysis vessel is moved to the sludge inlet 401, and then injected into the hydrolysis vessel through the sludge inlet 401 together with the cold sludge.
12. Hot sludge pipe is moved to the inside, the hot sludge tube rotates; And

    And a low temperature sludge moving unit configured to move while exchanging heat with an outer surface of the high temperature sludge tube so that the low temperature sludge is not mixed with the high temperature sludge.

    The low temperature sludge is heated by heat exchange with the hot sludge while moving in contact with the outer surface of the hot sludge tube, the hot sludge is cooled by heat exchange with the low temperature sludge.
13. The method of claim 12,

    The high temperature sludge tube is composed of the first and second high temperature sludge tubes rotated while engaging the projections formed on the outer surface,

    The low temperature sludge moving unit includes a plurality of unit members installed to be connected to each other,

    The unit member,

    An inlet through which low temperature organic sludge is introduced;

    An outlet through which low temperature organic sludge is discharged; And,

    And a moving space formed between the inlet and the outlet, and having first and second high temperature sludge pipes installed therein.

    The inlet is connected to the outlet of the unit member installed on one side and the outlet is connected to the inlet of the unit member installed on the other side, the cold sludge introduced through the inlet is in contact with the first and second hot sludge pipes while moving to the outlet Heated by

    Cold sludge is accommodated in the groove between the projections, the cold sludge accommodated in the groove is discharged out of the groove when the projections are engaged with each other, the contact heat exchange unit, characterized in that the cold sludge flows into the groove when the engagement is opened.
14. The method of claim 12,

    Further comprising a pressurized injection unit for supplying the cold sludge to the cold sludge moving unit by applying pressure to the cold sludge,

    Pressurized injection unit,

    A contact heat exchange unit comprising: an injection unit for preventing suction pressure from being generated in the cold sludge, and a pressurizing unit for pressurizing the cold sludge via the injection unit.
15. The method of claim 12,

    A closed frame in which a cold sludge inlet and a cold sludge outlet are formed;

    A pair of first high temperature sludge tubes installed in the frame, wherein the hot sludge is moved, and the protrusions formed on the outer surface are engaged with each other to rotate;

    A pair of second high temperature sludges installed in the frame, the high temperature sludge is moved therein, and the protrusions formed on the outer surface rotate in engagement with each other, and rotate in a direction opposite to the rotation direction of the pair of first high temperature sludge tubes. Including;

    The pair of first high temperature sludge tubes and the pair of first high temperature sludge tubes are arranged to be adjacent to each other, and the cold sludge introduced through the low temperature sludge inlet is accommodated in the grooves between the protrusions and rotates in the first and second high temperature sludge tubes. Heat exchanged with the first and second high temperature sludge pipe while moving to the low temperature sludge outlet by

    The low temperature sludge accommodated in the groove is discharged out of the groove when the protrusions are engaged with each other, and when the engagement is made, the low temperature sludge flows into the groove, and the pair of first high temperature sludge tubes and the pair of second high temperature sludge tubes rotate to form a frame. Contact heat exchange unit, characterized in that the low temperature sludge is stirred by generating a pressure difference of the low temperature sludge.
16. The method of claim 12,

    A closed frame in which a cold sludge inlet and a cold sludge outlet are formed;

    A first hot sludge tube installed in the frame, the hot sludge is moved therein, and a protruding portion formed on an outer surface thereof;

    A second hot sludge tube installed in the frame, the inside of which is heated hot sludge, and an outer side of which is formed a protrusion to be engaged with the protrusion, and the protrusions are engaged with each other to rotate together with the first hot sludge tube. Including,

    The low temperature sludge introduced through the low temperature sludge inlet is accommodated in the groove between the protrusions and is moved to the low temperature sludge outlet by the rotation of the first and second high temperature sludge tubes, thereby exchanging heat with the first and second high temperature sludge tubes.

    The low temperature sludge accommodated in the groove is discharged out of the groove when the protrusions are engaged with each other, and when the engagement occurs, the low temperature sludge is introduced into the groove, and the low temperature sludge has a high pressure inside the frame due to the rotation of the first and second high temperature sludge tubes. Contact heat exchange unit, characterized in that there is a place and a low place.
17. The method according to claim 15 or 16,

    First and second high temperature sludge tube is installed in the longitudinal direction of the frame, the contact heat exchange unit, characterized in that the frame is cylindrical to withstand high pressure.
18. A high temperature heat exchanger container into which the hot sludge is injected, a low temperature heat exchanger container into which the low temperature sludge is injected, and a communicating portion communicating the high temperature heat exchanger container and the low temperature heat exchanger container,

    The hot sludge which is hydrolyzed in the heating unit and supplied to the high temperature heat exchange vessel is cooled and discharged while generating water vapor by a relatively low pressure inside the high temperature heat exchange vessel, and the low temperature sludge injected into the low temperature heat exchange vessel is combined with the water vapor. And is discharged after being heated by contact, wherein the water vapor is moved from the high temperature heat exchange vessel to the low temperature heat exchange vessel through a communicating portion.
19. The method of claim 18,

    Inside the low temperature heat exchange vessel includes a low temperature sludge transfer unit for moving the low temperature sludge to the discharge port,

    Low Temperature Sludge Transfer Unit,

    A first rotating body for moving the cold sludge downward while drawing the cold sludge toward the center of the cold heat exchange vessel;

    A second rotating body for moving the low temperature sludge downward while pushing the low temperature sludge toward the inner wall of the low temperature heat exchange vessel; And,

    Steam heat exchange unit comprising a; rotating shaft for rotating the first rotating body and the second rotating body.
20. The method of claim 18,

    The low temperature heat exchange vessel is provided with a stirring member for stirring the low temperature sludge, the low temperature heat exchange vessel is filled with the low temperature sludge, and the water vapor is injected into the inside of the low temperature sludge contained in the low temperature sludge container by a nozzle installed in the communication unit. Steam heat exchanger unit.
21. (a) a hydrolysis step of heating and hydrolyzing the cold sludge using steam to produce hot sludge;

    (b) a contact heat exchange step in which the hot sludge contacts the tube inside the tube so that the cold sludge and the hydrolyzed hot sludge do not mix with each other and the cold sludge contacts the tube at the outside of the tube to exchange heat by heat conduction; Including,

    The hot sludge is cooled by heat exchange with the cold sludge in the contact heat exchange step after the hydrolysis step, and the cold sludge is heated through the contact heat exchange step and the hydrolysis step sequentially, and the hydrolysis step and the contact heat exchange step are Sludge hydrolysis method, characterized in that made continuously.
22. The method of claim 21,

    Further comprising a steam heat exchange step between the step (a) and (b),

    Steam heat exchange stage,

    The hydrolyzed hot sludge is injected into the hot heat exchange vessel, the cold sludge that has undergone the contact heat exchange step is injected into the cold heat exchange vessel, and the hot sludge injected into the hot heat exchange vessel is vaporized by relatively low pressure inside the hot heat exchange vessel. When it is generated to be cooled, the sludge hydrolysis method characterized in that for supplying the steam to the low temperature heat exchange vessel to contact the low temperature sludge inside the low temperature heat exchange vessel to heat the low temperature sludge.
23. The method of claim 21 or 22,

    Sludge hydrolysis method characterized in that the low temperature sludge in the hydrolysis step and steam heat exchange step is heated by steam contact heating.
24. The method of claim 23, wherein

    When heating the low temperature sludge by using the steam or steam, the sludge hydrolysis method characterized in that for controlling the supply amount of steam or steam by measuring the pressure of the steam or steam.
25. The method of claim 21 or 22,

    After step (b),

    Sludge hydrolysis method characterized by separating solid content from solid components and liquid component among the components of high temperature sludge, and anaerobic digesting the liquid component to obtain methane gas.
26. The method of claim 21 or 22,

    After step (b),

    Sludge hydrolysis method characterized by separating solid content from solid component and liquid component among components of high temperature sludge, and pyrolyzing the said solid content to obtain pyrolysis gas and carbide.

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