KR102141236B1 - Various dredged soil purification system - Google Patents

Abstract

The present invention is intended to provide a purification system for various dredged soils capable of purifying contaminated soil or various dredged soils without heating and burning. The present invention provides a cylindrical type of contaminated soil or various dredged soils supplied from the dredged soil input hopper (2). A wet drum washer (3) configured to be cleaned with high-pressure sprinkling in the screen net (3), a sanding device (4) configured to float fine contaminants or organic matter by sanding and high-pressure bubbles, and the sanding device (4). The primary particle separator (5) and secondary particle separator (6) configured to be re-supplied to the sanding device (4) by inputting a mixture of treated water and dredged soil, washing and dehydrating if the indenter is large, and resupplying to the sanding device (4), and the sanding device A coagulant stirrer (7) configured to agitate the coagulant in the supernatant of (4), and the sedimentation tank (8) configured to discharge the supernatant water while supplying the sludge sinking to the bottom to the thickening tank (82), and to discharge floating contaminants from the supernatant water. Wow, it consists of a pressurized floatation tank 9 configured to float residual impurities such as oil in the supernatant water of the sedimentation tank 8 with high-pressure bubbles, and according to this, the soil contaminated using process water and air, not a heating and combustion method. It can be expected to maximize the purification efficiency, since secondary pollution caused by combustion can be prevented while being able to purify and discharge more cleanly.

Description

Various dredged soil purification system {Various dredged soil purification system}

The present invention is a purification system for various types of dredged soil, and if described in more detail, various types of dredged soil can be purified without heating or burning contaminated dredged soil generated when dredging contaminated soil, sewage, reservoir, ocean, etc. It's about the system.

In general, various harmful substances discharged from industrial activities accumulate in the soil, resulting in the production of agricultural and livestock products that are harmful to health or the growth of agricultural crops, contaminated soil, and sludge collected in sedimentation tanks of various water treatment facilities (= sludge) Wow, various types of dredged soil, such as waste sewage sludge discharged from construction works, contaminated dredged soil discharged during dredging after being settled on the bottom of reservoirs such as sea, rivers and lakes, and contaminated dredged soil discharged during dredging of various sewage. A large amount of pollutants are contained, and purification devices to purify contaminated dredged soil are being developed in great numbers as the prevention of environmental pollution has emerged as a worldwide issue.

The initial soil purification method was limited to washing or burning oil or various foreign substances contained in the soil, but it was not able to treat wastewater generated during washing and harmful gases and dust generated during combustion, thereby reducing water and air pollution. As a result, peripheral devices capable of treating such wastewater, oil gas, and dust were required.

As a conventional soil purification system, as published in Korean Patent Publication No. 19833 (published on April 15, 2000), a technique for washing contaminated soil by spraying washing water inside the drum has been developed. Purification of the soil by washing water had limitations in purifying various oils and heavy metals contained in the soil.

And, as published in Korean Patent Registration No. 864409 (announced on October 20, 2008), a technology that allows contaminated soil to be injected into the rotary kiln and supplied with heat from the ROT to desorb contaminants in the soil. Although it was developed, it is separately installed outside the rotary kiln where the soil contaminated with ROT that supplies the heat source and is supplied through the pipe, so it has a problem of heat loss and must be equipped as a separate facility. Because of the complex and bulky, equipment costs and manufacturing costs were soaring.

Accordingly, as published in Korean Patent Publication No. 120748 (published on November 5, 2013), a technology that combines a kiln drying furnace and a combustion furnace equipped with a burner has been developed, but this also has a complicated structure, which increases the manufacturing cost. There are a number of problems, such as deteriorating the purification efficiency of the soil due to the burning of the soil while having a considerable air purification facility in order to discharge it into the atmosphere because a large amount of harmful gases are generated because the contaminated soil is burned directly with the burner. There was.

KR 10-2000-0019833 A April 15, 2000. KR 10-0864409 B1 2008. 10. 20. KR 10-2013-0120748 A Nov. 5. 2013

In the present invention, in order to solve all the problems of the prior art, a new technology was created, and the present invention is to wash and sand the contaminated dredged soil in a non-heating method (using process water and air), and thereby vibrate. After washing and dehydration, it was completed with the task to be solved in the invention in order to provide a purification system for various dredged soils that could separate the sludge by mixing a coagulant and separate the oil to purify the dredged soil more cleanly.

In addition, it is possible to solve the problem of the invention to maximize the purification efficiency of the dredged soil by removing foreign substances and sorting according to specific gravity before washing the dredged soil.

In addition, the filtered water obtained by dewatering the sludge produced by mixing a coagulant can also be solved by separating oil by air to obtain cleaner soil.

In addition, although not separately described, other objects within the scope that can be inferred in consideration of the following inventions, claims, drawings, etc. for carrying out the following invention in detail the various dredged soil purification systems of the present invention are also present invention It is included in the overall task of

As a specific means for solving the problems of the above invention, in the present invention, various dredged soil purification systems are implemented, but the various dredged soil purification systems of the present invention collect contaminated soil or various dredged soil generated when dredging a reservoir or sewage. It is equipped with a dredged soil input hopper configured to input the perforated screen net into a cylindrical shape, and is configured to be washed by high pressure spraying through a number of nozzles inside, while gravel and impurities are automatically discharged to the conveyor, and the dredged soil of 10 mm or less is A wet drum washer configured to be stored in the lower hopper and transferred by a pump is provided, and four grit tanks are connected so that the dredged soil of 10 mm or less can be gritted through 4 stages, and the supernatant water flows to the next stage. A sanding device configured to float and discharge microscopic contaminants or organic matter dissolved in water by forming high-pressure bubbles inside the sanding tanks of the step and step 3 is provided, and the sanding treatment in the step 1 and step 2 of the sanding device A mixture of treated water and dredged soil is injected, and the washing water is sprayed through a nozzle installed at the top to wash gravel of 2 mm or more, and to be dewatered, while passing through an inclined mesh by vibration, stored in the lower hopper and supplied to the grit apparatus. A primary particle separator configured to be configured is provided, and a mixture of treated water and dredged soil treated in the 3rd and 4th steps of the sanding device is injected, and the washing water is sprayed through a nozzle installed at the top to collect sand of 0.075mm or more. A secondary particle separator configured to be washed and dehydrated and stored in the lower hopper through the inclined mesh body by vibration and supplied to the sanding device is provided, and a rotating stirrer is installed inside to stir the coagulant in the supernatant water flowing from the sanding device. A coagulant stirrer configured to supply and stir the coagulant supplied from the tank is provided, and the sludge settled on the bottom by sedimentation treatment of the wastewater diluted with the coagulant in the coagulant agitator is scraped with a scraper and supplied to the concentration tank while the supernatant floats upward. Is made to be discharged. A sedimentation tank configured to be discharged once more is provided, and a pressurization tank configured to float the oil of wastewater by introducing high-pressure bubbles supplied from the pressurization tank as supernatant water discharged from the sedimentation tank is introduced is provided.

In addition, the above-mentioned dredged soil input hopper consists of a reservoir dredged soil input hopper into which the dredged soil collected during the dredging of the reservoir is injected. Equipped with a motor, a fixed-quantity input conveyor installed so that one end is rotated at the bottom of the reservoir dredged soil input hopper is provided in order to quantitatively transfer the run-off dredged soil discharged from the hopper, and is transferred to the fixed-quantity input conveyor under the tip of the fixed-quantity input conveyor It may be characterized in that it is provided with a wet crusher installed to crush gravel or impurities contained in the reservoir dredged soil to a predetermined size and supply it to a wet drum washer.

In addition, the above-mentioned dredged soil input hopper consists of a lower level snow soil input hopper into which the dredged soil of sewage collected during the dredging of sewage is input, and when the lower level snow soil is introduced into the hopper above the lower level snow soil input hopper, it is included in the lower level snow soil. A foreign material remover installed to automatically remove gravel and impurities larger than the size is provided, and a specific gravity separator is installed in the front of the lower level snow soil input hopper to sort the gravel and impurities filtered by the foreign material removal device by the specific gravity by wind pressure. It is possible to wash the gravel and impurities separated by the specific gravity separator by spraying the washing water under high pressure, and store the dredged soil of 10 mm or less that passed through the inclined mesh under the vibration and put the mixture of treated water and the dredged soil into the grit apparatus. It may be characterized in that it is provided with a selective dehydration screen configured to be.

In addition, there is further provided a thickening tank consisting of a tank in which a conical hopper for storing the supplied sludge discharged from the settling tank is installed at the bottom, and the sludge transferred using a pump from the lower hopper of the thickening tank is transferred by a filter cloth installed on the filter plate. A filter press having a dehydration function configured to be discharged to the cake and the filtered water and configured to supply the filtered water discharged through the filter cloth to the pressurization tank may be further provided.

According to the specific means for solving the above-described problems, the purification system for various dredged soils of the present invention is not a combustion method in which thermal power such as a burner is directly injected to purify various types of dredged soil, but is washed in a drum using water and air. When dredging by sedimentation while passing through a number of hoppers, sorting and washing by vibration, separating sludge by mixing with coagulant, separating oil by high pressure bubble, etc. Contaminated soil can be purified more cleanly, and the dredged soil can be purged without burning flames, thereby preventing secondary pollution caused by combustion, thus purifying the dredged soil even more cleanly and air purification facilities by combustion. Since it is not necessary to equip, it is possible to reduce the cost of equipment, and for this reason, it has the effect of maximizing the purification efficiency even if the soil contaminated by non-combustion is purified by using water, air and a coagulant.

In the present invention, since the dredged soil is selected and washed by specific gravity, the purification efficiency can be further improved, thereby having an effect of obtaining a cleaner soil.

After sedimentation, even the sludge separated and discharged by mixing a coagulant is filtered and dehydrated, and the oil contained in the filtered water from which the cake is discharged is separated by a high-pressure bubble to purify the dredged soil. Since it can be reused as water, it also has the effect of reducing the waste of water.

In addition, in the purification system after sedimentation, the flocculant is mixed with the flocculant and the flotation contaminants after the separation of the sludge are re-precipitated, and the floating contaminants after the oil separation by the high-pressure bubble are circulated to re-sediment. The expected effect is a great invention.

1 is an exemplary view of the entire system showing a preferred example of the present invention
Figure 2 is an exemplary view extracting the configuration of the reservoir dredged soil input hopper of the present invention
Figure 3 is an exemplary view showing an excerpt of the configuration of the lower level sulphurous soil input hopper of the present invention
4 is an exemplary view showing the connection between the grit apparatus and the primary and secondary particle separators in the present invention
5 is an exemplary view showing an excerpt of a device associated with a coagulant stirrer in the present invention

The present invention is for various dredged soils that can be cleanly purified using water and air without heating various dredged soils (contaminated soil and dredged soil hereinafter collectively referred to as "dredged soil") such as contaminated soil or sewage, reservoir, and ocean As intended to provide a purification system, it will be described in more detail with the drawings in the following, but the accompanying drawings are only examples for easily explaining the content and scope of the technical idea of the present invention, and are not limited thereto. These terms are also intended to specifically describe the embodiments and should not be construed to be limited to the corresponding terms.

The various dredged soil purification system 1 of the present invention includes a dredged soil input hopper 2 for inputting various contaminated soil or dredged soil, and a wet drum cleaner 3 for the dredged soil transferred therefrom, Contaminated dredged soil by passing through the high-speed stirrer 41, the grit device (4), the primary and secondary particle separators (5) (6), the coagulant stirrer (7), the sedimentation tank (8) and the pressure flotation tank (9) in sequence. It is structured to be able to cleanse it.

In the present invention, the dredged soil input hopper 2 is made of a reservoir dredged soil input hopper 21 into which the dredged soil collected during the dredging of the reservoir is introduced, and such a reservoir dredged soil input hopper ( 21) is configured such that the vibration motor 22 is fixedly installed on one side of the casing so that the reservoir dredged soil injected into the reservoir dredged soil input hopper 21 is smoothly moved downward.

Along with this, in order to quantitatively transfer the reservoir dredged soil discharged from the reservoir dredged soil input hopper 21, a quantitative input conveyor 23 is installed at the bottom of the reservoir dredged soil input hopper 21 so that one end is rotated to the position, and a quantitative input conveyor Under the tip of (23), gravel or impurities contained in the reservoir dredged soil transferred to the fixed-quantity conveyor (23) are supplied from the air tank (A) and crushed to a predetermined size together with the sprayed water, and then transferred to the wet drum washer (3). A supply wet crusher 24 is installed.

In the present invention, the dredged soil input hopper (2) may be made of a low-level snow soil input hopper 25 into which the dredged soil of sewage collected during the dredging of sewage is input, as shown in FIG. 25) A foreign material remover (26) is installed to automatically remove gravel and impurities of a predetermined size or more contained in the lower level snow soil when the lower level snow soil is introduced into the hopper, and together with the lower level snow soil input hopper (25) A specific gravity separator 27 is installed in front of the debris remover 26 to sort the gravel and impurities filtered by the wind pressure by specific gravity.

Gravel and impurities that have passed through the specific gravity separator 27 are washed by spraying the washing water at high pressure from the selective dewatering screen 28, and a vibration unit is installed to generate vibration by rotating the main shaft made of eccentric at high speed, and downward from the vibration unit. While the discharge is made without clogging through the mesh of steel mesh installed at an angle of 8 to 10 degrees, the dredged soil of 10 mm or less that has passed through the mesh is stored in the hopper under the vibrating part and used with a wet drum washer (3). It is configured to be put in.

In the present invention, the wet drum washer (3) is a screen in which a perforated hole having a diameter of 10 mm, which is transferred to the front by rotation by flowing in the dredged soil supplied from the reservoir dredged soil input hopper 21 or the lower level snow soil input hopper 25, is formed The screen (3) is composed of a cylindrical shape, and the gravel and impurities of 10 mm or more are discharged through the conveyor (32), and a sorting discharger (33) that sorts by specific gravity discharged by wind pressure at the tip of the conveyor (32) and discharges it. Is installed, and the dredged soil of 10 mm or less is stored in the storage hopper 34 at the bottom together with the washing water, and then is configured to be discharged to the high-speed agitator 41 or the grit apparatus 4 by a pump.

The present invention is provided with a grit device (4) for grit treatment of the dredged soil and washing water washed in the wet drum washer (3), as shown in Fig. 4, the reservoir dredged soil input hopper 21 and the lower level snow soil input hopper In (25), the dredged reservoir soil and the lower level snow soil are simultaneously supplied to the wet drum washer (3), and are not directly supplied to the grit apparatus (4) when washing, and contamination by stirring the reservoir dredged soil and the lower level snow soil at high speed by the agitator installed inside. A high-speed stirrer 41 configured to separate and wash the soil and contaminated water can be installed, and the stirrer in the high-speed stirrer 41 is coated with a rubber material and is configured to withstand abrasion by the soil, and each stirrer is Eggplants are configured such that the three chambers 42 are arranged in series so that the mixture raised due to high-speed agitation passes to the next chamber 42, passes through the third chamber 42, and then is transferred to the grit apparatus 4.

Such a grating device 4 is configured to be grit-treated through four stages of the reservoir dredged soil of 10 mm or less and the lower level grit soil, and the four grating tanks 43 with a narrow lower and a wide upper part are connected to each other to form a four-stage grit. The bubble spraying device 44 is configured to be processed and connected from the air tank A to the inside of the 2nd and 3rd grit tank 43 to inject high-pressure bubbles to float fine impurities and organic matter. It is installed, and a scraper 45 is installed on the top of the grit tank 43 to remove fine contaminants and organic matter floating to the water surface by the bubble spray device 44 to the support tank 46, and to the scraper 45 The microscopic impurities or organic matters rolled into the support tank 46 are configured to be discharged through the discharge conveyor 47,

Of the four grit tanks 43 in the grit apparatus 4, the first stage grit tank 43 and the second stage grit tank 43 are connected by a primary particle separator 5, and the third stage grit tank 43 and The fourth-stage grit tank 43 is connected with a secondary particle separator 6.

The primary particle separator 5 injects a mixture of treated water and dredged soil treated in the first and second steps of the grit tank 43 and sprays washing water through a nozzle installed at the top to wash gravel of 2 mm or more and dehydrate. It is configured to process, and is configured to pass through the inclined mesh body by vibration and stored in the lower hopper to be supplied to the grit apparatus 4, and by rotating the eccentric main shaft at high speed, the vibration is generated at a downward angle of 8 to 10 While discharge is smoothly carried out through the mesh body installed in an inclined manner, the mixture of dredged soil of 2 mm or less that has passed through the mesh is stored in the hopper under the vibrating unit, and is then recycled to the grit apparatus (4) through the cyclone (50) by a pump. It is configured to be put in.

The secondary particle separator 6 injects a mixture of treated water and dredged soil treated in the 3rd and 4th steps of the grit tank 43 and sprays the washing water through a nozzle installed at the top to wash gravel of 0.075mm or more. It is configured to be dewatered, and is configured to pass through an inclined mesh body by vibration and stored in a lower hopper to be supplied to the grit apparatus 4, and the eccentric main shaft is rotated at high speed to generate vibration at a downward angle of 8~ A mixture of dredged soil of 0.075mm or less that has passed through the mesh is stored in the hopper below the vibration unit while the discharge is smoothly carried out through the mesh body installed at an inclination of 10 degrees, and the grit device (4) passes through the cyclone (60) by a pump. It is configured to be reintroduced.

In the present invention, as shown in Fig. 5, the supernatant water (water that is not sedimented by mixing the reservoir dredged soil or the lower level snow soil with the treated water) flowing from the grit apparatus 4 is a coagulant stirrer 7 and a sedimentation tank 8 associated therewith. It is configured to separate and wash by coagulating fine dredged soil dissolved in supernatant water by providing a pair of each.

The coagulant stirrer 7 is configured to supply a predetermined amount of coagulant supplied from the coagulant agitation tank 71 to the supernatant water flowing from the sanding device 4 to stir it, and inside the casing of the coagulant stirrer 7 A rotating stirrer 72 made of rotating blades rotated by an upper motor is installed.

The sedimentation tank 8 is configured to settle on the floor by sedimenting the coagulant and diluted wastewater in the coagulant agitator 7, and this sludge is scraped with a scraper 81 and supplied to the concentration tank 82 through a discharge pump. It is made, and the supernatant water is transferred to the next device, the pressurized floating tank 9, through the receiving tank 83, and the floating material discharge port on one side of the upper side of the settling tank 8 so that the floating material contained in the supernatant can be discharged and stored. 84) is installed, and the flotation storage tank 85 is connected to the flotation storage tank 85 to be transported and stored therein, and the wounded soil stored in the flotation storage tank 85 is configured to be resupplied to the grit apparatus 4.

At this time, the thickening tank 82 consists of a tank in which a conical hopper for storing sludge discharged from the settling tank 8 is installed at the bottom, and after the sludge is supplied and concentrated for a certain period of time, it is pumped from the lower hopper of the thickening tank 82. A filter press 86 transferred by the filter press 86 is provided, and the filter press 86 is a filter cloth having a dehydration function to be divided into cake and filtered water by press-fitting a pump that transfers sludge from the thickening tank 82. A filter plate is installed, and the cake compressed between the filter cloths installed on the filter plate is automatically discharged, and the filtered water filtered through the filter cloth and discharged is supplied to the pressurization tank 9.

The pressurized flotation tank 9 is configured to be supplied from the pressurizing tank 91 as supernatant water discharged from the settling tank 8 flows in and to float the oil by high-pressure bubbles generated inside the pressurizing flotation tank 9, The pressurization tank 91 discharges the wastewater from the pressurization tank 9 to the pressurization pump 92 and passes it through an ejector so that external air is introduced to generate air and is purified to the pressurized flotation tank 9. It is configured, and the floating matter such as oil floated by the high pressure bubble is automatically discharged to the floating material storage tank 94 by the scraper 93, and the floating impurities such as oil discharged to the floating material storage tank 94 It is configured to be resupplied to 4).

And finally, the purified treated water obtained by discharging residual contaminants such as oil by high-pressure bubbles in the pressurized floating tank 9 is discharged and stored in the treated water storage tank 10 to be used in the purification system 1 of the present invention to be described later. The process water can be supplied to the process water storage tank (W) where process water is stored and connected to a pipe for reuse, or a pipe can be installed to discharge it as sewage.

In addition, various dredged soil purification systems 1 of the present invention are purified by only process water and air, which are water, without heating, and such process water filters the water in the make-up water storage tank (W1) storing tap water or nearby river water. One water is stored in the process water storage tank (W) and then supplied to the wet drum washer (3), the primary particle separator (5), the secondary particle separator (6), and the selective dewatering screen (28) using process water. A pipe is connected to control the supply amount, and the air is a wet shredder (24), a wet drum washer (3), and a grit device (4) that stores the air produced by the compressor in the air tank (A) and uses the air. The pipes are connected so as to be supplied to the bubble spraying device 44, the primary particle separator 5, the secondary particle separator 6, and the selective dewatering screen 28 respectively, and the supply amount is controlled together with pressure.

The various dredged soil purification system 1 of the present invention configured as described above is a wet crusher through a quantitative supply conveyor 32 before collecting contaminated soil or putting dredged soil of a reservoir or sewage into a wet drum washer (3). It is crushed and supplied to the wet drum washer (3) through (24), and only the dredged soil of 10 mm or less through the foreign matter remover (26), the specific gravity separator (27) and the selective dewatering screen (28) for the lower level snow soil is a wet drum washer (3). To supply it.

While supplying process water and air from the wet drum washer (3) and cleaning, the dredged soil of 10 mm or less is transferred to the grit apparatus (4) together with the washing water, but when the reservoir dredged soil and the lower level snow soil are injected at the same time, the high-speed agitator (41) It is mixed and separated into contaminated soil and contaminated water, passing through the four grit tanks 43 in the grit apparatus 4, and floating fine contaminants and organic materials by bubbles by the bubble spray apparatus 44 of the 2nd and 3rd stages. The mixture is removed and discharged with a scraper 45, and the mixture deposited in the 1st and 2nd stage sedimentation tanks 43 is washed and dewatered in the primary particle separator 5 to discharge gravel of 2 mm or more while the dredged soil mixture of 2 mm or less is again The mixture is supplied to the grit apparatus 4, and the mixture deposited in the 3rd and 4th stage grit tank 43 is washed and dewatered in the secondary particle separator 6 to discharge the sand of 0.075mm or less while the dredged soil mixture of 0.075mm or less is It is supplied to the Saadi grit apparatus (4).

Afterwards, the supernatant water transferred from the sedimentation device 4 is mixed with the coagulant in the coagulant agitator 7 and then the sludge settled on the floor in the sedimentation tank 8 is scraped with a scraper 81 and supplied to the thickening tank 82. The floating supernatant water is discharged to the pressurized flotation tank (9), while the flotation impurities in the supernatant are discharged to the flotation tank to be resupplied to the grit apparatus (4).

The sludge discharged from the sedimentation tank (8) is supplied by a pump from the concentration tank (82) to the filter press (86), and the cake is automatically discharged by the filter cloth installed on the filter plate, and the filtered water is discharged to pressurize the filtered water. ) To supply.

Finally, the supernatant water discharged from the sedimentation tank (8) and the filtered water discharged from the filter press (86) are supplied to the pressure flotation tank (9) and air is injected from the pressure tank (91) to float residual impurities such as oils that are still remaining. However, residual floating impurities such as oil floating on the top of the pressurized flotation tank (9) are discharged to the floating material storage tank (94) to be resupplied to the grit apparatus (4), and the finally purified treated water is the treated water storage tank. It can be stored in (10) and sent to the process water storage tank (W) to be reused as the process water of the present invention, or discharged to a sewage relay pumping station, etc. for water treatment and then discharged.

The present invention constructed and operated as described above is not a heating and combustion method that directly injects thermal power such as a burner, but uses water (= process water) and air to purify and discharge contaminated soil more cleanly. Since the dredged soil is not burnt by flame, secondary pollution by combustion can be prevented, so it can be purged more cleanly, and equipment costs can be reduced since it is not necessary to have an air purification facility by combustion. Even if a coagulant is used to purify contaminated soil by non-combustion, purification efficiency can be maximized.

In addition, in the present invention, since the dredged soil is sorted and washed by specific gravity, the purification efficiency can be further improved, thereby obtaining a cleaner soil, and even the sludge separated and discharged by mixing a coagulant after sedimentation is filtered and dehydrated to discharge the cake. By separating the oil contained in the filtered water with a high pressure bubble, even the treated water after purifying the dredged soil can be purified cleanly, and the purified water can be reused as process water to prevent waste of water.

As described above, in the detailed description of the present invention, the most preferred embodiments of the present invention have been described, but various modifications may be implemented within the scope not departing from the technical scope of the present invention. It is not limited to the examples, and the scope of protection from the technologies in the claims to be described later and from these technologies to equivalent technical means should be recognized.

1: Purification system
2: Dredged soil input hopper 21: Reservoir dredged soil input hopper 22: Vibration motor 23: Quantitative input conveyor 24: Wet shredder 25: Lower level sulphur input hopper 26: Foreign matter remover 27: Specific gravity separator 28: Selective dewatering screen
3: Wet drum washer 31: Screen net 32: (discharge of impurities) Conveyor 33: Sorting discharger 34: Storage hopper
4: Grit apparatus 41: High-speed stirrer 42: Chamber 43: Grit tank 44: Bubble spray apparatus 45: Scraper 46: Support tank 47: Discharge conveyor
5: primary particle separator 50: cyclone
6: secondary particle separator 60: cyclone
7: coagulant stirrer 71: coagulation stirrer tank 72: rotary stirrer
8: settling tank 81: scraper 82: thickening tank 83: receiving tank 84: floating material outlet 85: floating material storage tank 86: filter press
9: Pressurized flotation tank 91: Pressurized tank 92: Pressurized pump 93: Scraper 94: Float storage tank
10: treated water storage tank
A: Air tank
W: process water storage tank W1: supplementary water storage tank

Claims (6)

Dredged soil input hopper (2) configured to collect and input contaminated soil or various types of dredged soil from dredging;
The perforated screen net 31 is formed in a cylindrical shape and is configured to be washed with high pressure spraying through a plurality of nozzles inside, and gravel and impurities are automatically discharged to the conveyor 32, while the dredged soil is stored in the lower hopper together with the washing water. A wet drum cleaner 3 configured to be conveyed by a pump;
Four grit tanks 43 are connected so that the dredged soil can be sanded through four steps, so that supernatant water flows to the next step, and high-pressure bubbles are formed inside the grit tanks 43 of the second and third steps. A sedimentation device 4 configured to be discharged separately by floating microscopic impurities or organic matter dissolved in;
It is configured to wash gravel and dewater by spraying the washing water through a nozzle installed at the top by injecting a mixture of treated water and dredged soil in the grating tank 43 of the 1st and 2nd steps of the grit apparatus 4. , A primary particle separator 5 configured to pass through the inclined mesh body by vibration and be stored in the lower hopper and supplied to the grit apparatus 4;
A mixture of treated water and dredged soil in the 3rd and 4th steps of the sandblasting device 4 is injected and the washing water is sprayed through a nozzle installed at the top to wash the sand and dewatering. , A secondary particle separator 6 configured to pass through the inclined mesh body by vibration and be stored in the lower hopper and supplied to the grit apparatus 4;
Various dredged soil purification system, characterized in that it contains.
The method according to claim 1;
A coagulant stirrer 7 configured to supply and stir the coagulant supplied from the coagulant agitation tank 71 to the supernatant water flowing from the sanding device 4 with a rotating stirrer 72 installed inside;
The sludge settled on the floor by sedimentation treatment of the wastewater diluted with the coagulant in the coagulant stirrer (7) is collected by a scraper (81) and supplied to the thickening tank (82), and the supernatant water floating on the top is made to be discharged. A sedimentation tank (8) configured to discharge the floating impurities once more;
A pressurized floatation tank 9 configured to float the oil of the wastewater by introducing the high-pressure bubbles supplied from the pressure tank 91 as the supernatant water discharged from the sedimentation tank 8 flows in;
Various dredged soil purification system, characterized in that further included.
The method according to claim 1;
The dredged soil input hopper 2 consists of a reservoir dredged soil input hopper 21 into which the dredged soil collected during the dredging of the reservoir is injected;
A vibration motor 22 fixedly installed on one side of the casing so that the dredged soil is smoothly moved to the bottom of the dredged soil input hopper 21;
A fixed-quantity input conveyor 23 installed at one end of the reservoir dredged soil input hopper 21 to be rotated so that one end is positioned at the bottom of the reservoir dredged soil input hopper 21 in order to quantitatively transfer the reservoir dredged soil discharged from the reservoir dredged soil input hopper;
A wet crusher 24 installed to crush gravel or impurities contained in the reservoir dredged soil transferred to the fixed-quantity input conveyor 23 to a predetermined size and supply it to the wet drum washer (3) under the tip of the quantitative input conveyor 23;
Various dredged soil purification system, characterized in that it contains.
The method according to claim 1;
The dredged soil input hopper (2) is made of a low-level snow soil input hopper (25) into which the dredged soil of sewage collected during the dredging of sewage is input;
A foreign material remover 26 installed to automatically remove gravel and impurities of a predetermined size or more contained in the lower level snow soil when the lower level snow soil is introduced into the lower level snow soil input hopper 25 on the upper side;
A specific gravity separator 27 installed in front of the lower level snow soil input hopper 25 to sort the gravel and impurities filtered by the foreign material remover 26 by the specific gravity by wind pressure;
Washing water is sprayed on the gravel and impurities separated by the specific gravity separator (27) by high-pressure spraying, and the dredged soil that has passed through the inclined net by vibration is stored in the lower part, and the mixture of the treated water and the dredged soil is injected into the grit apparatus (4). Selective dehydration screen 28 configured to be able to;
Various dredged soil purification system, characterized in that it is included.
The method according to claim 1;
A sorting discharger 33 installed to sort gravel and impurities automatically discharged from the wet drum washer 3 to the conveyor 32 by specific gravity by wind pressure;
Various dredged soil purification system, characterized in that further included.
The method according to claim 2;
A thickening tank 82 in which a conical hopper for storing the supplied sludge discharged from the settling tank 8 is installed in a lower portion thereof;
Dehydration function configured to discharge the sludge transferred from the lower hopper of the thickening tank 82 using a pump to the cake and filtered water by a filter cloth installed on the filter plate, and supply the filtered water discharged through the filter cloth to the pressurization tank 9 A filter press 86 having a;
Various dredged soil purification system, characterized in that further included.

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