KR101127507B1 - processing system for dredged soil - Google Patents

Abstract

The present invention relates to a dredged soil treatment system, wherein the dredged soil treatment system easily separates and removes coarse waste or aggregate contained in the dredged soil, and separates and removes organic suspended solids contained in dredged soil by cyclone and washing water. Such sludge is removed to be more easily treated with a dredged soil (sand) of a constant size washed in a clean state.
To this end, the dredged soil treatment system of the present invention is a sorting unit consisting of a high pressure water tank and a two-stage vibrating screen to separate and remove coarse waste and coarse aggregate from the dredged soil; The first and second sand tanks equipped with a first and second sand pumps, first and second cyclones, a rapid washing tank, and an air pump are provided to remove organic materials and organic rich substances from dredged soil sent from the sorting unit. An organic material treatment part comprising a fine air flotation device provided; The water treatment unit consisting of a water collecting tank, a sedimentation tank, a washing water tank, a sludge storage tank, and a sludge dehydrator to process the washing drainage to remove various sludge and fine dredged soil contained in the dredged soil in the organic material treatment unit.

Description

Dredging Soil Treatment System {processing system for dredged soil}

The present invention relates to a dredged soil treatment system, and more particularly, to easily separate and remove coarse waste or coarse aggregate contained in dredged soil, and to separate and remove organic suspended solids contained in dredged soil by cyclone and washing water. The present invention relates to a dredged soil treatment system for more easily treating the dredged soil having a constant size washed in a clean state by removing the sludge.

Generally, coarse wastes and coarse aggregates contained in dredged soils generated at construction sites such as river dredging and waste disposal sites are separated and removed to reuse the dredged soils from which the sludges are removed. do.

Here, in order to separate and remove the sludge contained in the dredged soil to remove the coarse waste (wood, plastic, etc.) and aggregates such as coarse gravel of the sludge manually by placing the dredged soil on the conveying conveyor.

Then, water is injected into the dredged soil from which the coarse waste and the coarse aggregate are removed, and the organic material or the organic rich substance contained in the dredged soil is removed from the dredged soil by the sprayed water.

However, the operation of separating and removing the sludge from the dredged soil according to the separation and removal of the sludge, that is, coarse waste or coarse aggregate, and organic matter, organic floating material, and the like in the dredged soil is made separately. This very uncomfortable, of course, there is a problem that the work efficiency is reduced, such as a lot of manpower and time.

In addition, it is very difficult to separate and remove coarse waste and coarse aggregate from the sludge contained in the dredged soil transported by using a conveying conveyor, and to remove organic substances or organic suspended solids from the sludge contained in the dredged soil. Even if water is sprayed into the dredged soil, there is a problem that it is not easy to remove the organic substances or organic rich substances contained in the dredged soil by the pressure of the sprayed water.

On the other hand, the separation and removal of coarse waste or coarse aggregate from the dredged soil and the operation of removing the organic material or organic suspended solids is performed separately, the work efficiency of removing the sludge contained in the dredged soil, as well as the dredged soil treatment efficiency There was also a problem of this deterioration.

The present invention has been proposed to solve the problems in the prior art as described above, and includes a dredged soil treatment system comprising a vibration screen device, a micro-air flotation device, a water treatment device, a plurality of cyclones, a plurality of water tanks, and the like. In the vibrating screen device of the dredged soil treatment system to separate and remove the sludge, that is, coarse waste, coarse aggregate, etc. contained in the dredged soil, and in the micro-air flotation device and water treatment device and each cyclone and In addition to the removal and treatment of sludge from the dredged soil more easily and easily, such as removing organic suspended solids, as well as to easily process the dredged soil of a constant size washed in a clean state to remove the sludge, as well as to wash the dredged soil Treatment of the dredged soil such as reuse of wash water The purpose is to improve the function of the system and to improve the dredged soil treatment efficiency.

The present invention for achieving the object as described above, the high-pressure water tank for spraying high-pressure water to the dredged soil to decompose the aggregated dredged soil sent from the carry-in storage tank containing the dredged soil containing various sludge; Two stages of the coarse waste, coarse aggregate and small dredged soil of sludge included in the dredged soil sent from the high pressure water tank to vibrate and transport the coarse waste and coarse aggregate to the dredged soil to be carried out to the outside. Vibration screen; A first sand tank having a first sand pump through which the dredged soil having a small thickness passing through the two-stage vibrating screen is introduced; The dredged soil having a small thickness is introduced by the first sand pump of the first sand tank and installed on the first sand tank, thereby separating and removing the organic material contained in the dredged soil as primary. Primary cyclone to separate small dredged and fine dredged soil; A rapid washing tank for rapidly dividing dredged soil having a small thickness sent from the primary cyclone with washing water to separate and remove organic substances contained in the dredged soil in a secondary manner; A micro-air flotation device having an air pump for injecting ultra-fine foam into the dredged soil to float and remove the organic flocculant from the dredged soil in which the dredged soil and the coagulant are separated from the organic material sent from the rapid washing tank; A second sand tank having a secondary sand pump into which a dredged soil having a predetermined size (less than 5 mm) settled to the bottom of the micro air flotation device is introduced; The dredged soil of a predetermined size is introduced by the second sand pump of the second sand tank, which is installed on the second sand tank, and separates and removes the organic material contained in the dredged soil of the predetermined size. Secondary cyclone that is separated into a certain size of dredged soil and fine dredged soil; A water collecting tank containing washing and draining water so that the organic material and the fine dredged soil sent from the primary cyclone and the secondary cyclone are introduced and a coagulant is introduced to simultaneously condense the fine dredged soil and the organic material; A sedimentation tank separating fine dredged soil and supernatant water by a flocculation agent and a coagulation agent by being introduced into a washing drainage water containing fine dredged soil sent from the sump tank; A sludge storage tank in which fine dredged soil separated and sent from the sedimentation tank and organic rich substances sent from the fine air flotation device are introduced and a coagulant is introduced to condense the sludge by stirring; A sludge dehydrator for sending condensed sludge from the sludge storage tank to a dewatering filtrate generated by dewatering the introduced sludge to a washing tank and a collecting tank, respectively; Dredged soil treatment system characterized in that the supernatant water separated from the sedimentation tank is introduced, and the high pressure water tank and the second stage vibrating screen, a rapid washing tank, and a washing water tank containing the washing water to send the washing water to the air pump of the micro-air flotation device. This is provided.

In addition, the present invention, the two-stage vibrating screen, the primary mesh network is formed in the mesh size of the coarse waste can not pass while sprinkling, and installed in the lower portion of the primary mesh network to pass through the primary mesh network Coarse aggregate is not provided in the aggregate is provided dredged soil processing system characterized in that the secondary mesh network is formed that the mesh is formed to pass the size of the fine dredged soil is small.

The present invention also provides a dredged soil processing system, characterized in that the mesh of the primary mesh network is 30mm.

The present invention also provides a dredged soil processing system, characterized in that the mesh of the secondary mesh network is 5mm.

In addition, the present invention, the coarse waste that does not pass through the primary mesh network of the two-stage vibrating screen is carried out to the outside of the first mesh network, the coarse aggregate that does not pass through the secondary mesh network of the two-stage vibrating screen is 2 A dredged soil processing system is transported by a coarse aggregate conveying conveyor installed outside of the primary mesh network and is carried out of the secondary mesh network.

The present invention also provides a dredged soil treatment system, characterized in that the size of the ultra-fine air bubbles generated in the micro-air flotation device is 5 ~ 15㎛.

In another aspect, the present invention, there is provided a dredged soil treatment system characterized in that the organic floating material separated from the dredged soil by the ultra-fine air bubbles generated in the micro-air flotation device is sent to the sludge storage tank from the micro-air flotation device.

In addition, the present invention, the size of the fine dredged soil separated from the primary cyclone and sent to the sump tank and the size of the fine dredged soil separated from the secondary cyclone and sent to the sump tank is less than 0.075mm. Provided is a dredged soil treatment system characterized in that the configuration.

The present invention also provides a dredged soil treatment system below the secondary cyclone is provided with a dewatering screen to remove the water contained in the dredged soil of a certain size from which the organic material discharged to the lower portion of the secondary cyclone is removed. do.

In another aspect, the present invention, a flocculation agent is introduced between the sump tank and the sedimentation tank together with the washing drainage containing the fine dredged soil sent from the sump, and a line mix is installed to mix the washing drainage and the flocculant containing the introduced fine dredged soil. A dredged soil treatment system is provided.

The present invention also provides a dredged soil treatment system, characterized in that the sludge storage tank is provided with a stirrer for preventing the reduction of the effective capacity in the sludge storage tank due to the sludge settling sedimentation and mixing with the injected coagulant.

In another aspect, the present invention, the coagulant solution tank containing the coagulant solution to put the coagulant into the fine air flotation device and the water collection tank, and a coagulant soluble tank for dissolving the coagulant by the external water flows into the coagulant sent from the feed solution tank, A dewatering coagulant pump installed in the coagulant solution tank and having a pumping force to send the coagulant from the coagulant solution tank to the sludge storage tank, and installed in the coagulant solution tank to inject coagulant from the coagulant solution tank to the fine air flotation device and the collection tank. There is provided a dredged soil treatment system, further comprising a coagulant input unit comprising a coagulant solution pump to pump.

The present invention also relates to a coagulant stock solution tank containing a coagulant stock solution so that a coagulant is introduced into a settling tank, a coagulant dissolving tank for dissolving a coagulant by external water which is contained in a coagulant sent from the coagulant stock solution tank, and the coagulant dissolving tank. A dredged soil treatment system is further provided, comprising a coagulant injector comprising a coagulant solution pump having a pumping force to send a coagulant to a line mixer at the front of the sedimentation tank.

In addition, the present invention, a replenishment water tank containing the external water supplied from the outside to replenish the water used in the dredged soil treatment system is installed, the outside of the replenishment tank is pumped to cool the dehydrator pump in the replenishment water tank A cooling water pump having a force is installed, and a supplementary water pump having a pumping force is installed outside the supplementary water tank to send the discharged external water to the coagulant dissolving tank and the coagulant dissolving tank, respectively. do.

According to the present invention made as described above, the high-pressure water tank and the vibrating screen is composed of a sorting unit, a plurality of cyclones, micro-air flotation device and organic matter treatment unit consisting of a rapid washing tank, a collection tank, a settling tank and a washing tank including a plurality of tanks By providing a dredged soil treatment system including a water treatment unit and a number of other devices, the sorting unit of the dredged soil treatment system not only easily and easily separates and removes sludge, that is, coarse waste or coarse aggregate, included in the dredged soil. The organic material treatment unit has an effect of smoothly removing the organic substances and organic rich substances contained in the dredged soil.

In addition, the organic oxygen and fine dredged soil contained in the water used to remove the sludge and organic substances, etc. contained in the dredged soil, as well as increase the dissolved oxygen concentration in the water by the micro-bubbles generated in the micro-air flotation device. By recycling the water into the dredged soil treatment system, not only can it be reused to remove organic substances and organic rich substances contained in the dredged soil, but also reduce the waste of resources by the reused water as well as environmental pollution. It also has the effect of preventing.

Therefore, the dredged soil treating apparatus more easily removes sludge such as coarse waste, coarse aggregate, and organic material from dredged soil, and the sludge removal operation is not only made of one process system but also the dredged soil is cleaned and cleaned. As a result, the treatment efficiency of treating the dredged soil is improved.

In addition, the coarse waste or coarse aggregate separated from the dredged soil treatment apparatus is discharged to the outside and collected and removed at a predetermined place, and the sludge is made into a dewatered cake in which the water is removed from the sludge dehydrator to facilitate the treatment. In addition, the dredged soil of a certain size washed in a clean state in which the sludge has been removed, that is, by extracting sand and reusing the sand, it is easy to process the dredged soil by the dredged soil treatment device as well as the function and performance of the dredged soil treatment device is improved. There is also an effect.

1 is a block diagram showing a dredged soil treatment system of the present invention.
Figure 2 is a dredged soil treatment system diagram of the present invention dredged soil treatment system.

Hereinafter, the dredged soil treatment system according to the present invention will be described in more detail with reference to FIGS. 1 and 2.

1 is a block diagram showing a dredged soil treatment system of the present invention, Figure 2 is a schematic diagram of a dredged soil treatment system of the present invention dredged soil treatment system.

The present invention is provided with a dredged soil treatment system for separating and removing coarse waste and coarse aggregate, and sludge such as organic substances and organic suspended solids contained in the dredged soil generated in construction sites such as river dredging and waste treatment sites.

1 and 2, the dredged soil treatment system, as shown in Figure 1 and 2, the sorting unit to separate and remove the coarse waste and coarse aggregate (gravel) in the dredged soil containing various sludge, and is sent from the sorting unit Organic material treatment unit for removing organic substances and organic rich substances contained in dredged soil, and washing used to separate and remove various sludges, that is, coarse waste, coarse aggregate and organic material, fine dredged soil, etc. It is largely composed of a water treatment unit for treating wastewater.

The sorting unit is composed of a carry-in storage tank 10, a high pressure water tank 20, and a two-stage vibrating screen 30, the organic material treatment unit primary cyclone (50) and rapid washing tank (60), and fine air Floating device 70, secondary cyclone 90, dehydration screen (91), the water treatment unit 100, sedimentation tank 110 and washing tank 120 and sludge storage tank 130, sludge dehydrator It consists of 140.

Here, if the configuration of each of the sorting unit in more detail, the loading storage tank 10 is provided with a dredged soil containing various sludges, that is, coarse waste and coarse aggregate, organic materials and the like is stored from the outside.

Agglomerated dredged soil sent from the import storage tank 10 is introduced, as well as a high pressure water tank 20 for spraying high-pressure water into the agglomerated dredged soil to break down the agglomerated dredged soil finely.

As a method of sending the dredged soil agglomerated into the high pressure water tank 20 in the import storage tank 10, there are a variety of methods and methods using a device such as a fork lane, or using a conveying conveyor.

When the high-pressure water is injected into the dredged dredged soil introduced into the high pressure water tank 20 from the import storage tank 10, the agglomerated dredged soil is crushed into a predetermined size and the broken dredged soil is coarse waste (wood, plastic, etc.). ), And is separated into fine dredged soil with a small thickness and aggregate (gravel) of 5 mm or thicker.

Here, the fine dredged soil is accumulated sludge containing a considerable amount of organic material, the surface of the aggregate of 5mm or more is attached to facilitate the separation of fine dredged soil and organic material.

Below the high pressure water tank 20, a two-stage vibrating screen for spraying and spraying the sludge so as to separate the coarse waste and coarse aggregate from the finely divided dredged soil sent from the high pressure water tank 20 into coarse waste and small aggregate, respectively. 30 is provided.

The two-stage vibrating screen 30 is composed of a primary mesh network 31 having a mesh size of 30 mm and a secondary mesh network 32 having a mesh size of 5 mm.

Therefore, the coarse waste contained in the finely divided dredged soil sent to the upper portion of the primary mesh network 31 of the two-stage vibrating screen 30 is filtered in the primary mesh network 31 so that the filtered coarse waste is 2 However, while being transported along the primary mesh network 31 of the vibrating screen 30, the outside of the primary mesh network 31, that is, is sent to the yard formed on the outside of the second stage vibrating screen 30.

In addition, various aggregates and dredged soil which have passed through the primary mesh network 31 of the second stage vibrating screen 30 are sent to the upper portion of the secondary mesh network 32, and in the secondary mesh network 32, 5 mm or less. The dredged soil of the secondary mesh network 32 is sent to the lower portion of the aggregate and dredged soil of a certain size (more than 5mm) caught on the secondary mesh network 32 is the secondary of the two-stage vibrating screen (30) It is conveyed along mesh network 32.

Aggregate of a predetermined size, dredged soil transported along the secondary mesh network 32 is discharged to the outside of the secondary mesh network 32, that is, the second stage vibrating screen 30, the discharge of the constant size Aggregate, dredged soil is sent to the yard while being transported by the coarse aggregate conveying conveyor (33).

In other words, the dredged soil sent from the high pressure water tank 20 to the two-stage vibrating screen 30 is coarse by vibrating and upper sprinkling of the first and second mesh networks 31 and 32 of the two-stage vibrating screen 30. Waste and a certain size, that is, separated into more than 5mm and less than aggregate, dredged soil, and the coarse waste and more than 5mm aggregate is carried out to the outside of the two-stage vibrating screen 30 and piled up in the yard.

Here, when the respective components of the organic material treatment unit will be described in more detail, the outside of the two-stage vibrating screen 30 passes through the first and second mesh networks 31 and 32 of the two-stage vibrating screen 30. Primary sand tank (40) into which the dredged soil is introduced is small (5 mm or less), and the primary sand tank (41) is installed in the primary sand tank (40) to pump the dredged soil introduced therein. .

In the upper part of the primary sand tank 40, a series of power cyclones and non-powered cyclones into which dredged soil having small thickness pumped by the pumping force of the primary sand pump 41 of the primary sand tank 40 is introduced. However, the configured primary cyclone 50 is installed.

The primary cyclone 50 separates and removes the organic material contained in the dredged soil having a small thickness from the dredged soil first, as well as separating the dredged soil into a fine size (0.075mm) or more.

The fine dredged soil separated into the fine size, that is, less than 0.075 mm is introduced into the sump tank 100, and the small dredged soil between the constant size (less than 5 mm) and the fine size (greater than 0.075 mm) is rapidly washed (60). ) Flows into.

The outer side of the primary cyclone 50 is provided with a rapid washing tank 60 into which dredged soil sent from the primary cyclone 50 flows, and the rapid washing tank 60 flows into the rapid washing tank 60. The stirrer 61 which is rotated by the driving force of a motor (not shown) is rotatably coupled while rapidly dredging the dredged soil and washing water with a special wing.

The small dredged soil having a predetermined size (less than 5mm) and fine size (more than 0.075mm) containing the organic material introduced into the rapid washing tank 60 and is sent from the washing tank 120 into the rapid washing tank 60 The washing water is rapidly floated and mixed by the rotating stirrer 61, and the dredged soil is washed, as well as the organic material contained and adhered to the dredged soil is secondarily separated and removed.

The dredged soil having a small thickness sent from the quick wash tank 60, that is, less than 5 mm of dredged soil is introduced into the outer side of the rapid washing tank 60, as well as a flocculant is introduced to float and remove the organic suspended solids contained in the dredged soil. The fine air flotation device 70 is installed.

On the outside of the rapid cleaning tank 60 is a rapid pump 62 having a pumping force pumped to send the dredged soil having a small thickness of the organic material separated in the rapid washing tank 60 to the micro-air flotation device (70) One side of the micro-air flotation device 70 is provided with an air pump 71 for injecting ultra-fine foam into the dredged soil so as to float the organic floating material contained in the dredged soil.

The air pump 71 supplies air together with the washing water sent from the washing water tank 120 into the micro-air flotation device 70 to form bubbles in an extremely fine shape, that is, 5 to 15 in the micro-air floating device 70. Ultra-micro-strength foam having a size of μm is injected and sprayed into the dredged soil introduced into the micro-air flotation device (70).

Then, the organic floating material contained in the dredged soil is separated from the dredged soil by the spraying ultra-fine air bubbles to rise to the upper portion in the micro-air flotation device 70, the separated organic floating material is fine air floating device ( 70 is discharged to the outside of the sludge storage tank 130 is removed.

As the dissolved oxygen concentration in the water is increased by the ultra-fine air bubbles sprayed from the micro-air flotation device 70, it is possible to more effectively remove the organic material and the organic floating material in the dredged soil treatment system.

On the outside of the micro-air flotation device 70, a secondary sand tank 80, into which a dredged soil of a predetermined size (less than 5 mm), which descends and descends in the micro-air flotation device 70, is introduced, is installed. A secondary sand pump 81 is installed in the secondary sand tank 80 to pump the dredged soil of a predetermined size to the outside of the secondary sand tank 80.

On the upper part of the secondary sand tank 80, a series of power cyclones into which dredged soil of a predetermined size (less than 5 mm) pumped by the pumping force of the secondary sand pump 81 of the secondary sand tank 80 is introduced; A secondary cyclone 90 composed of two stages of non-powered cyclones is provided.

The secondary cyclone 90 not only removes and removes residual organic matter contained in the dredged soil of a predetermined size (less than 5 mm), but also dredged soil and fine (less than 0.075 mm) dredged soil of the predetermined size (less than 5 mm). Separate.

The fine (less than 0.075mm) dredged soil separated from the secondary cyclone (90) is introduced into the sump (100), the dredged soil of the predetermined size (less than 5mm) is discharged to the outside through the lower portion of the secondary cyclone (90) do.

A dehydration screen 91 is installed at a lower portion of the secondary cyclone 90, and a dredged soil having a predetermined size (less than 5 mm) discharged to the outside through the lower portion of the secondary cyclone 90 is a dehydration screen 91. The dehydration screen (91) is sent to remove the water contained in the dredged soil of a certain size (less than 5mm), and the dredged soil, that is, sand of a predetermined size (less than 5mm) washed in a clean state from which the water is removed. The tow conveyor 92 transports the yard to the yard.

Here, when the configuration of the water treatment unit in more detail, the fine (less than 0.075mm) dredged soil and coagulant sent from the primary cyclone 50 and the secondary cyclone 90 and the coagulant dissolution tank 152 and A water collecting tank 100 in which a washing drainage water into which a dehydration liquid sent from the sludge dehydrator 140 is introduced is installed, and the water collecting tank 100 first condenses the fine dredged soil as a coagulant.

A sedimentation tank 110 is installed outside of the sump tank 100, and in the sedimentation tank 110, a washing drainage sent from the sump tank 100, that is, a washing drainage containing organic material and fine dredged soil is introduced. The flocculant sent from the flocculant dissolution tank 162 is input, and the organic material and the fine dredged soil are chemically aggregated by the flocculant, and are separated from the supernatant by the gravity settling process which precipitates to the lower side while flocculating.

Between the sump tank 100 and the settling tank 110 is provided with a line mix 111 for mixing the washing drainage and the flocculant, in the line mix 111 by the sump pump 101 in the sump tank 100 The pumped washing drainage flows in and the flocculant sent from the flocculant dissolution tank 162 is introduced to agglomerate fine dredged soil and the organic material included in the washing drainage with the flocculant.

In the sump tank 100, a sump pump 101 for pumping the washing drainage to send the washing drainage including fine dredged soil and organic material to the line mix 111 through the washing drainage line 102 is installed. The bypass line 103 is provided at a predetermined position of the washing drain line 102 to send the washing drain flowing through the washing drain line 102 back into the water collecting tank 100.

The outer side of the settling tank 110 is provided with a washing water tank 120 in which the supernatant separated from the settling tank 110 is introduced. The supernatant water sent from the settling tank 110 to the washing water tank 120 is a supernatant flow line ( A discharge line 123 is introduced to discharge the supernatant water flowing in the upper supernatant flow path 122 into a dredged soil treatment system at a predetermined position of the upper superflux flow path 122.

The washing water tank 120 is introduced into the supernatant is sent from the sedimentation tank 110 and the dehydration filtrate sent from the sludge dehydrator 140 is introduced and the external water is introduced from the replenishment tank 171 to be described later.

In addition, the washing water in the washing tank 120 is sent to the air pump 71 of the high pressure spray tank 20 and the two-stage vibrating screen 30, the rapid washing tank 60 and the micro-air flotation device 70, A washing water pump 121 having a pumping force is installed in the washing water tank 120 to pump the washing water sent to the high pressure water tank 20 and the rapid washing tank 60.

The washing water line 124 is connected to the washing water pump 121 and is a flow path of the washing water sent to the high pressure water tank 20, the second stage vibrating screen 30, and the rapid washing tank 60, and the washing water line ( At a predetermined position of the 124, a bypass line 125 is installed to send the washing water flowing in the washing water line 124 back into the washing water tank 120.

Therefore, the washing water in the washing tank 120 through the washing water line 124 is introduced into the high pressure water tank 20, the two-stage vibrating screen 30 and the rapid washing tank 60, through the bypass line 125 As the washing water flowing in the washing water line 124 flows back into the washing water tank 120, the washing water is used more efficiently.

In addition, the washing water in the washing tank 120 sent to the micro-air flotation device 70 is sent to the micro-air flotation device 70 to the washing tank 120 by the pumping force of the air pump (71).

As described above, the washing water in the washing tank 120 is sent to each device of the dredged soil treatment system and then used again and then the washing water in the washing tank 120 is recycled.

In the sludge storage tank 130, the dredged soil containing the organic material precipitated to the lower part in the sedimentation tank 110 is introduced, and the organic rich material sent from the micro-air flotation device 70 is introduced and the sludge and the organic rich material are introduced. The sludge storage tank 130 is provided with a stirrer to which the coagulant sent from the coagulant melting tank 152 is added to coagulate.

In the sludge storage tank 130, the sludge is reformed while being flocculated by coagulant and agitation in which organic material-containing dredged soil and organic flotation are added and floated in the sludge storage tank 130.

The coagulant feedstock is introduced into the sludge storage tank 130 by the dehydration coagulant pump 153 as necessary. This is to increase the dewatering efficiency by condensing more organic materials and organic floating substances in the sludge storage tank 130. to be.

On the outside of the sludge storage tank 130, the condensed sludge sent from the sludge storage tank 130 flows through the sludge flow path 131 to dehydrate the water contained in the introduced sludge to form the sludge as a dehydration cake. The sludge dehydrator 140 is installed.

Since the dehydrator pump 132 is installed at a predetermined position of the sludge flow line 131 installed between the sludge storage tank 130 and the sludge dehydrator 140, the dehydrator pump 132 is a sludge dehydrator in the sludge storage tank 130. Pump (140) to send the condensation sludge.

On the other hand, there is provided a coagulant input unit for introducing a coagulant into the micro-air flotation device 70 and the sump tank 100, the coagulant input unit is provided with a coagulant stock solution tank 151 containing the coagulant stock solution, the coagulant The stock solution tank 151 contains a coagulant sent from the coagulant stock solution tank 151, as well as a coagulant dissolving tank 152 that is mixed with external water that is sent from the replenishment water tank 171 to dissolve the coagulant. It is installed.

In addition, a dewatering coagulant pump 153 having a pumping force is provided to send the coagulant from the coagulant solution tank 151 to the sludge storage tank 130, and the coagulant dissolving tank 152 has the coagulant dissolving tank 152. A coagulant solution pump 154 is installed to pump the coagulant into the fine air flotation device 70 and the sump tank 100.

That is, the flocculant dissolved by mixing the coagulant stock solution with the external water is introduced into the micro-air flotation apparatus 70 and the water collecting tank 100, and the organic flocculant and the water collecting tank in the dredged soil having a small thickness in the micro-air flotation apparatus 70. At 100, fine dredged soil is condensed and separated.

Meanwhile, the flocculant is introduced into the line mix 111 of the settling tank 100 to agglomerate the coagulated organic material and the fine dredged soil sent from the sump 100 to the line mix 111 and settle in the settling tank 100. A flocculant inlet is provided.

The coagulant input unit is provided with a coagulant stock solution tank 161 containing the coagulant stock solution, and the coagulant sent from the coagulant stock solution tank 161 is contained in the outer side of the coagulant stock solution tank 161 as well as a supplement water tank ( The coagulant dissolution tank 162 is mixed with the external water sent from the 171 to dissolve the coagulant is installed, the coagulant dissolution tank 162 is settled in the flocculant dissolution tank 162 in the settling tank 100 And a coagulant solution pump 163 having a pumping force for pumping the coagulant into the line mix 111.

That is, the coagulant stock solution is mixed with external water, and the dissolved coagulant is introduced into the line mix 111 to coagulate and separate the organic material and the fine dredged soil sent from the water collecting tank 100 to the line mix 111.

Here, in order to replenish water used in the dredged soil treatment system, that is, to the coagulant dissolution tank 152 and the coagulant dissolution tank 162 to dissolve the coagulant and the flocculant, and to the washing tank 120 to send the washing tank 120 Replenishing the washing water in the), is provided with an external water replenishment for replenishing the water used when cooling the dehydrator pump 132 pumped from the sludge storage tank 130 to the sludge dehydrator 140.

The external water supplement part is provided with a replenishment water tank 171 to receive the external water supplied and supplied from the outside from the outside, the replenishment water tank 171 in the dehydrator pump 132 in the replenishment water tank 171 A cooling water pump 172 having a pumping force to be sent through the external water flow channel 174 is connected and installed, and the cooling water pump 172 is installed at a predetermined position of the external water flow channel 174. .

In addition, a supplementary water pump having a pumping force to send external water discharged from the supplemental water tank 171 to the coagulant dissolving tank 152 and the coagulant dissolving tank 162 on the outside of the supplemental water tank 171 ( 173) is installed.

Then, the external water flowing in the external water flow path line 174 is replenished at a predetermined position of the external water flow path line 174 discharged from the supplement water tank 171 and pumped by the cooling water pump 172. The bypass line 175 is installed to be sent back to the water tank 171, the replenishment tank 171 in the replenishment tank 171 by the external water introduced into the replenishment tank 171. An overflow line 176 is provided to allow the external water to flow from the supplemental water tank 171 to the washing water tank 120 in order to prevent the external water from overflowing.

Therefore, the supplementary water tank 171 is continuously supplied with external water from the outside as well as the supplied external water is not only used to dissolve the coagulant and flocculant, but also continuously supplied to prevent the lack of washing water in the washing water tank 120. And, it is used for cooling the dehydrator pump 132 pumped from the sludge storage tank 130 to the sludge dehydrator 140.

In this case, a surfactant may be added to the rapid washing tank 60 as necessary, in order to separate the organic material from the dredged soil having a small thickness in the rapid washing tank 60.

As described above, the sludge included in the dredged soil introduced into the dredged soil treatment system, that is, coarse waste, coarse aggregate and organic matter, and organic suspended solids can be easily and easily separated, thereby removing unnecessary sludge from the dredged soil. All of the above processes are continuously sequentially circulated in order to extract the small sized dredged soil (sand) that can be used, and to reuse the water (wash water, washing drainage, etc.) used for sludge removal and sand extraction from the dredged soil. By this, the dredged soil is treated more efficiently in the dredged soil treatment system.

As such, the dredged soil treatment system according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings described herein, and various modifications may be made by those skilled in the art within the technical scope of the present invention. Since it may be made, it should not be understood individually from the technical spirit or prospect of the present invention.

10: carry-on storage tank 20: high pressure water tank
30: two-stage vibration screen 40: the first sand tank
50: primary cyclone 60: rapid wash bath
70: fine air flotation device 80: secondary sand tank
90: secondary cyclone 100: sump
110: sedimentation tank 120: washing water tank
130: sludge reservoir 140: sludge dehydrator

Claims (14)

A high pressure water sprayer spraying high-pressure water into the dredged soil to decompose the dredged soil sent from an import storage tank into which dredged soil containing various sludges is loaded and stored;
Two stages of the coarse waste, coarse aggregate and small dredged soil of sludge included in the dredged soil sent from the high pressure water tank to vibrate and transport the coarse waste and coarse aggregate to the dredged soil to be carried out to the outside. Vibration screen;
A first sand tank having a first sand pump through which the dredged soil having a small thickness passing through the two-stage vibrating screen is introduced;
The dredged soil having a small thickness is introduced by the first sand pump of the first sand tank and installed on the first sand tank, thereby separating and removing the organic material contained in the dredged soil as primary. Primary cyclone to separate small dredged and fine dredged soil;
A rapid washing tank for rapidly dividing dredged soil having a small thickness sent from the primary cyclone with washing water to separate and remove organic substances contained in the dredged soil in a secondary manner;
A micro-air flotation device having an air pump for injecting ultra-fine foam into the dredged soil to float and remove the organic flocculant from the dredged soil in which the dredged soil and the coagulant are separated from the organic material sent from the rapid washing tank;
A second sand tank having a secondary sand pump into which a dredged soil having a predetermined size (less than 5 mm) settled to the bottom of the micro air flotation device is introduced;
The dredged soil of a predetermined size is introduced by the second sand pump of the second sand tank, which is installed on the second sand tank, and separates and removes the organic material contained in the dredged soil of the predetermined size. Secondary cyclone that is separated into a certain size of dredged soil and fine dredged soil;
A water collecting tank containing washing and draining water so that the organic material and the fine dredged soil sent from the primary cyclone and the secondary cyclone are introduced and a coagulant is introduced to simultaneously condense the fine dredged soil and the organic material;
A sedimentation tank separating fine dredged soil and supernatant water by a flocculation agent and a coagulation agent by being introduced into a washing drainage water containing fine dredged soil sent from the sump tank;
A sludge storage tank in which fine dredged soil separated and sent from the sedimentation tank and organic rich substances sent from the fine air flotation device are introduced and a coagulant is introduced to condense the sludge by stirring;
A sludge dehydrator for sending condensed sludge from the sludge storage tank to a dewatering filtrate generated by dewatering the introduced sludge to a washing tank and a collecting tank, respectively;
Dredged soil treatment system characterized in that the supernatant water separated from the sedimentation tank is introduced and the washing water containing the washing water to send the washing water to the high pressure water tank and the two-stage vibrating screen, the rapid washing tank and the air pump of the micro-air flotation device; . The method of claim 1,
Two stage vibrating screen,
A primary mesh network that sprays and forms a mesh of a size that coarse waste cannot pass through,
The secondary mesh network is installed in the lower portion of the primary mesh network is passed through the primary mesh network, the coarse aggregate does not pass, the secondary mesh network is formed to form a size of the mesh passing only small fine dredged soil small Dredge Soil Treatment System. The method of claim 2,
Dredge soil treatment system, characterized in that the mesh of the primary mesh network is 30mm. The method of claim 2,
Dredge soil treatment system, characterized in that the mesh of the secondary mesh network is 5mm. The method according to claim 1 or 2,
Coarse waste that has not passed through the primary mesh of the second stage vibrating screen is taken out of the primary mesh network, and coarse aggregate that fails to pass through the secondary mesh of the second stage vibrating screen is outside of the secondary mesh network. Dredged soil processing system characterized in that the conveyed by the coarse aggregate conveying conveyor installed in the transported to the outside of the secondary mesh network. The method of claim 1,
Dredged soil treatment system, characterized in that the size of the ultra-fine air bubbles generated in the micro-air flotation device is 5 ~ 15㎛. The method of claim 1,
Dredged soil treatment system characterized in that the organic floating material separated from the dredged soil by the ultra-fine air bubbles generated in the micro air flotation device is sent to the sludge storage tank from the micro air flotation device. The method of claim 1,
The fine dredged soil separated from the primary cyclone and sent to the sump and the dredged soil separated from the secondary cyclone and sent to the sump are less than 0.075mm.The cyclone is composed of two stages, a series of power cyclones and a non-powered cyclone. Dredged soil processing system. The method of claim 1,
Underneath the secondary cyclone is a dredged soil treatment system characterized in that the dewatering screen is installed to remove the water contained in the dredged soil of a predetermined size from which the organic material discharged to the lower portion of the secondary cyclone is installed. The method of claim 1,
Dredging soil treatment system, characterized in that the flocculant is introduced between the sump and the sedimentation tank with a washing drain containing the fine dredged soil sent from the sump, and a line mix for mixing the washing drainage and the flocculant containing the introduced fine dredged soil is installed. . The method of claim 1,
The sludge storage tank is dredged soil treatment system characterized in that the stirrer is installed to prevent the reduction of the effective capacity in the sludge storage tank due to the sludge settling sedimentation and mixing with the injected coagulant. The method of claim 1,
A coagulant solution tank containing the coagulant feed solution to input the coagulant into the micro-air flotation device and the water collection tank, a coagulant dissolving tank for dissolving the coagulant by the external water introduced by containing the coagulant sent from the feed solution tank, and installed in the coagulant solution tank And a dewatering coagulant pump having a pumping force to send the coagulant from the coagulant solution tank to the sludge storage tank, and a coagulant solution pump installed in the coagulant dissolving tank to pump the coagulant from the coagulant dissolving tank to a fine air flotation device and a collecting tank. Dredged soil processing system characterized in that it further comprises a coagulant input portion. The method of claim 1,
Line of coagulant stock solution containing coagulant stock solution to inject coagulant into the settling tank, coagulant dissolving tank for dissolving coagulant by external water which is contained in the coagulant sent from the coagulant stock tank, Dredged soil treatment system characterized in that it further comprises a coagulant input unit consisting of a coagulant solution pump having a pumping force to send a coagulant to the mixer. The method of claim 1,
In order to replenish the water used in the dredged soil treatment system, a replenishment water tank containing external water supplied from the outside is installed, and a coolant pump having a pumping force to cool the dehydrator pump in the replenishment tank outside the replenishment water tank. Is installed, the dredged soil treatment system, characterized in that the replenishment water pump having a pumping force is installed to send the external water discharged to the coagulant dissolution tank and the coagulant dissolution tank, respectively.

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