KR100251344B1 - Method and system for purifying rivers - Google Patents

Abstract

PURPOSE: A river purifying method and a system thereof are provided, which can treat deposits such as sludge, contaminated water, gravel and sand and red earth by mechanically and physically continuously. The system is small and portable and can be easily transferred to a place required to treat river. CONSTITUTION: The system comprises the followings: (i) a first collecting device for collecting contaminated deposits (12) from river, lake and swamp and for feeding; (ii) chemical tanks; (iii) storage tanks for storing washing water to clean deposits and for feeding; (iv) a washer (18) for primary washing the contaminated deposits at the washing tank (20), for secondary washing and for transferring to outside; (v) a first reaction tank (30) for receiving contaminants including hydrophilic particles and for converting to hydrophobic particles by chemicals; (vi) a concentration tank (32) for separating sludge containing hydrophobic particles and supernatant and for discharging to outside; (vii) a centrifuge (34) for dewatering the sludge to form sludge cake; and (vii) a filtrate tank (50) for the sludge water separated from the sludge at the centrifuge (34).

Description

METHOD AND SYSTEM FOR PURIFYING RIVERS

The present invention relates to a stream purification method and a stream purification system, and more particularly, to purify sludge and muddy water, sludge and sand contaminated by sludge, and red soil in a river or lake, and a swamp. It relates to a method and a river purification system.

Lakes, swamps, and rivers are becoming increasingly polluted as populations grow and concentrations of production activity. This pollution originates from the deposition of sludge that is harmful to the environment, and is further expanded by eutrophication of water and pollution of heavy metals. Therefore, the problem of treating sludge is indispensable for the purification of rivers.

Conventional methods for treating sludge include a method of dredging and removing deposited sludge and a method of encapsulating and treating sludge in a deposited state. The method of dredging and removing the sludge deposited is the method of natural sedimentation or sun-drying the dredged sludge and sewage water, and the method of dewatering in a dehydrator. However, natural sedimentation or sun-drying methods require treatment paper for accommodating sludge and muddy water, making it difficult to secure treated paper, and it is difficult to manage odor, sludge and muddy water, and the like. The dehydration method using a dehydrator requires precipitation, concentration, and crude pretreatment, and the sludge cake, which is a dehydrated sludge material, has a water content of 80% -90%, so that the sludge cake is dried and incinerated again. Need processing. In addition, since the water separated by the dehydrator is sludge water containing a large amount of fine particles, a separate post-treatment is also required, so a large-scale facility is required to treat sludge and muddy water in large quantities. On the other hand, the method of encapsulating and treating sludge in a deposited state covers the surface layer of the deposited sludge with concrete. Since this method is a work performed underwater, the problem is that the polluted water is expanded and the contaminated area is spread. In addition, since it is a method of covering the bottom of the river, there is a problem of destroying the ecosystem, there is a problem that can not be treated with filthy water.

The present invention is to solve such a conventional problem, the object of the stream or lake, and sludge such as swamp and sludge, and a new type of stream that can efficiently and stably clean the sediment contaminated by sludge To provide a purification method and a river purification system.

1 is a block diagram of a stream purification system for purifying contaminated sediments and heads such as rivers, lakes, and swamps according to an embodiment of the present invention;

FIG. 2 is a flow chart showing the process of purifying contaminated sediment with heads in the system of FIG. 1;

3 is a schematic diagram of a system for purifying a modified head furnace in the system of FIG. 1;

4 is a flow chart showing the process of purifying the headway in the system of FIG. 3.

* Explanation of symbols for the main parts of the drawings

10: sewage purification system 12: sediment

14 Hopper 16,40 Belt Conveyor

18,18 ': Washing machine 20,20': Washing tank

22,22 ': Washing water supply line 24,24': Washing water

30,30 ': first reactor 32,32': concentration tank

33,33 ': Supernatant 34,34': Centrifuge

36,36 ': Conveyor Unit 38,38': Screw Conveyor

50,50 ': filtrate 52: second reactor

54 filter 60 reservoir

Chemical tank: 70-1, 70-2, 70-3, 70-4, 70-5, 70-6, 70-7

Chemical tank: 70-1 ', 70-2', 70-3 ', 70-4', 70-5 ', 70-6'

80: head purification system 82: river

84: head to 90: pump

92: drum screen 94: contaminants

According to a feature of the present invention for achieving the above object, the stream purification system comprises: first means for collecting and supplying contaminated sediments (sand, gravel and red soil, etc.) in a river or lake, and a swamp; A medicine tank for containing and supplying a predetermined medicine; A reservoir for receiving and supplying washing water for cleaning the contaminated deposits; A washing machine for first washing the contaminated sediment supplied from the first collecting means in a washing tank containing washing water, second washing using the washing water supplied from the storage tank, and transferring the washed washing to the outside; ; A first reactor for accommodating contaminants including hydrophilic properties particles supplied from said washing tank and for converting hydrophilic particles of said contaminants into hydrophobic property particles by a chemical supplied from said chemical tank; A concentrating tank for separating the contaminants including the hydrophobic particles into sludge and supernatant, and discharging the supernatant to the outside; A centrifuge for dewatering the sludge transferred from the concentrating tank to form a sludge cake; A conveyor device for conveying the sludge cake to the outside; And a filtrate tank for receiving the sludge number separated from the sludge in the centrifuge.

The stream purification system of the present invention may further include a second means for collecting contaminants (head furnace) including hydrophilic particles from a river, a lake, a swamp, and the like, and supplying them to the first reactor. The river purification system includes a second reactor for receiving and receiving the sludge water of the filtrate tank and purifying the slurry water with a predetermined medicine supplied from the medicine tank; A filter for separating the sludge and the treated water by filtering the slurry number of the second reactor may be further included.

According to another aspect of the present invention for achieving the above object, the stream purification system comprises: means for collecting and supplying contaminants including hydrophilic particles in rivers, lakes, and swamps; A medicine tank for containing and supplying a predetermined medicine; A reaction tank for accommodating the contaminants supplied from the sampling means and converting the hydrophilic particles of the contaminants into hydrophobic particles by a chemical supplied from the chemical tank; A concentrating tank for separating the contaminants including the hydrophobic particles into sludge and supernatant and discharging the supernatant to the outside; A centrifugal separator for dewatering the sludge conveyed from the concentration tank to form a sludge cake; A conveyor device for conveying the sludge cake to the outside; And a filtrate tank for receiving the sludge number separated from the sludge in the centrifuge.

The stream purification system of the present invention as described above may further include a feedback device for supplying the sludge water contained in the filtrate tank to the reactor. The conveyor apparatus may comprise a screw conveyor.

According to yet another aspect of the present invention for achieving the above object, the stream purification method comprises the steps of transferring the contaminated sediments (sand, gravel and red soil, etc.) in the river to the cleaner; Supplying the washing water to the washing machine to wash the contaminated sediment and transferring the washed washing to the outside; Transferring contaminants including hydrophilic particles from the wash bath to a first reactor; Supplying a chemical to the first reactor to change the hydrophilic particles of the contaminant into hydrophobic particles; Allowing contaminants containing the hydrophobic particles to be transferred to a concentration tank and separated into sludge and supernatant water; Discharging the supernatant to the outside and transferring the sludge to a centrifuge; Dewatering the sludge to form a sludge cake, and transferring the sludge cake to the outside; Purifying the sludge water separated from the sludge in the centrifuge.

In addition, the stream purification method of the present invention may further comprise the step of transferring the contaminants containing hydrophilic particles in the stream to the first reactor. The chemicals supplied to the first reactor are at least one of an organic matter treatment agent, a heavy metal insoluble agent, and an aggregation aid. The sludge cake is solidified by a solidifying agent in the step of being transferred to the outside. In the stream purification method, the supernatant is accommodated in a reservoir and then used as the wash water. Purifying the slurry water may include transferring the slurry water to a second reactor; Supplying a predetermined chemical to the second reactor; Filtering the slurry number of the second reactor into sludge and treated water; Discharging the treated water to the outside, it may include the step of transferring the sludge to the outside. In the stream purification method, the treated water separated by the filtering is accommodated in a storage tank and then used as the washing water.

According to yet another aspect of the present invention for achieving the above object, the stream purification method comprises the steps of transferring a contaminant (head to head) containing hydrophilic particles in the river to the reaction tank; Supplying a chemical to the reactor, converting the hydrophilic particles of the contaminants into hydrophobic particles; Allowing contaminants containing the hydrophobic particles to be transferred to a concentration tank and separated into sludge and supernatant water; Discharging the supernatant to the outside and transferring the sludge to a centrifuge; Dewatering the sludge to form a sludge cake, and transferring the sludge cake to the outside; Purifying the sludge water separated from the sludge in the centrifuge. The chemicals supplied to the reactor are at least one of an organic matter treatment agent, a heavy metal insoluble agent, and a coagulation aid. The sludge cake is solidified by a solidifying agent in the step of being transferred to the outside. The stream purification method may further include transferring the sludge water to the reactor to perform a purification process.

By the stream purification method and the stream purification system of the present invention, sewage and sludge water such as streams, lakes, and swamps, and sediments such as gravel, sand, and red soil are continuously added, and mechanical and physical properties are applied to continuously purify them. You can. This stream purification method and system, when purifying sludge or sludge, facilitates management of sludge and sludge discharge, or countermeasures against their odors, and prevents secondary pollution caused by sludge and sludge. Can be. In particular, the system can be installed in a narrow space, and can be moved according to the contaminated local situation, it is possible to easily perform the purification of rivers, lakes, swamps, etc. with a small facility.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. In addition, in these drawings, the same reference numerals are denoted together for components that perform the same function.

1 is a block diagram of a stream purification system for purifying sediment contaminated by sludge and sludge such as a stream or a lake and a swamp according to an embodiment of the present invention. 2 is a flow chart showing a process for purifying sludge in the system of FIG.

1 and 2, the river purification system 10 according to the embodiment of the present invention may purify the sediment 12 such as sand, gravel and red soil contaminated by sludge. The system can also purify the head 84. As will be described in detail later, this purification system may comprise a separate portion for purifying contaminated deposits 12 and a portion for purifying headway 84. The headway 84 refers to contaminated mud and the like deposited on the bottom of a river or lake, and a swamp.

On the other hand, the problem in treating sludge is that there are many hydrophilic colloids in the sludge. Since this hydrophilic colloid worsens sludge drainage, it is difficult to process sludge. That is, sludge is generally composed of organic fine particles such as proteins, carbohydrates, fatty acids, and hydrocarbons in micron or angstrom units. Since these organic fine particles are colloidal in water such as lakes, streams and swamps, they are usually negatively charged and most of them are hydrophilic. Here, the hydrophilicity of the microparticles refers to a state in which water molecules adhere to the microparticles and the organic microparticles are covered with water shells, and the microparticles bind the water molecules so that the water molecules cannot freely escape. The particles in this state are called hydrophilic particles. In addition, the hydrophobicity of microparticles | fine-particles means the state in which microparticles | fine-particles do not restrain water molecules. The particles in this state are called hydrophobic particles. Large particles are naturally precipitated and deposited under water to form a so-called sludge layer, but small particles are suspended forever without sedimentation. This is known to be because the hydrophilic particles make the hydrophobic particles difficult to settle and float together by inserting the hydrophobic particles, so that the hydrophobic particles have a dispersed state due to mutual repulsion of copper wire charges. Therefore, the heavy metal is changed into a stable insoluble by the complex salt reaction, and the material having a positive charge is loaded with a coagulating material (CGX), which causes the repulsive force between the fine particles to be changed to aspiration by electric neutralization. The hydrophilic fine particles (to the head) contaminated can be removed. In other words, depending on the degree of pollution of the river and the use of some preparation in addition to ORS, CGX will be able to achieve a complete purification effect.

On the other hand, the purification method and system of the present invention can be classified into two types. The first is a method and system for purifying head furnaces, which are contaminants containing hydrophilic particles, deposited in water, and the second is sludge and filthy water and heavy metals deposited and adhered to gravel or sand in the bed, and to red soil. And a method and system for purifying the back. These two methods can be built as a single system and can be configured separately. In addition, the purifying method and system of the present invention collects contaminated sediment or head furnace by the equipment, and then continuously inputs a certain amount so that the washing is continuously performed by applying mechanical and physical properties. Moreover, a purification system is comprised by the mobile type so that a movement process may be performed according to the situation of a processing plant.

Referring again to FIGS. 1 and 2, the stream purification system 10 according to an embodiment of the present invention may include a first collecting means, a second collecting means, and chemical tanks 70-1, 70-2, and 70-3. , 70-4, 70-5, 70-6, 70-7), washer 18, first reactor 30, concentration tank 32, centrifuge 34, conveyor device 36, filtrate tank ( 50), the second reactor 52, the filter 54, the reservoir 60, and the like. The system is capable of purifying sludge and muddy water and heavy metals deposited and attached to gravel or sand on the bed and in the bed, and contaminants containing hydrophilic particles. The first collecting means collects deposits 12, such as gravel or sand on the bottom, and red soil, and supplies them to the hopper 14. The deposit 12 is fed to the washers 18, 18 ′ via a belt conveyor 16. The cleaners 18 and 18 'mix well the sediments 12 of different specific gravity and size to completely purify the contaminants attached to the contaminated sediments 12. In addition, in order to remove contaminants, contaminated sediments 12 are subjected to strong abrasion between each other, and the washing water washed in the washing tanks 20 and 20 'may be washed water supply lines 22 and 22 to prevent secondary contamination. Secondary cleaning is performed by the wash water supplied through '). The cleaning product 24 which has undergone the secondary cleaning is transferred to the outside. At this time, the washing tank (20, 20 '), in order to completely deal with the degassed contaminants, to take a high concentration of contaminants as the minimum washing water. The contaminants generated in the washing tanks 20 and 20 'are contaminants such as headro, which are contaminants containing hydrophilic particles. The second collecting means comprises a pump 90 for collecting the 84 from the stream 82 to the head and a drum screen 92 for separating the contaminants 94 containing hydrophilic particles. The contaminant 94 is supplied to the first reactor 30. Therefore, the contaminants generated in the washing tanks 20, 20 'are chemical tanks 70-2, 70-3, 70- in the first reaction tank 30, such as heads supplied by the second collecting means. 4, 70-5, 70-6). The contaminants of the first reactor 30 are transferred to the concentration tank 32 to be precipitated. The supernatant 33 separated from the contaminant in the concentration tank 32 is accommodated in the storage tank 60 and constitutes a purification system for returning to the washing water. The sludge precipitated in the concentration tank 32 is sludge caked in the centrifuge (34). At this time, the sludge number separated by the centrifuge 34 is accommodated in the filtrate tank 50, the sludge number is the second chemical supply from the chemical tanks (70-5, 70-6, 70-7) It is first purified in the reactor (52), and completely purified through the filter (54) is received in the reservoir (60). The chemical tanks 70-2, 70-3, 70-4, 70-5, 70-6, and 70-7 contain organic substance treatment agent, heavy metal insoluble agent, flocculent aid, PH regulator, coagulant, and polymer. do. The first reactor 30 is supplied with an organic substance treatment agent, a heavy metal insoluble agent, a coagulation aid, a pH regulator, a coagulant, and the like, and the second reactor 52 is supplied with a PH regulator, a coagulant, a polymer, and the like. One chemical tank 70-1 contains a solidifying agent. This solidifying agent is fed to the conveyor apparatus 36, which transfers the sludge cake to a designated yard, so that the sludge cake is solidified. The conveyor device 36 is composed of a screw conveyor 38 and a belt conveyor 40. The sludge cake is solidified and crushed in the screw conveyor 38 and transferred to the landfill or the yard through the belt conveyor 40.

3 is a schematic diagram of a modified system for purifying a headway in the system of FIG. 1. 4 is a flow chart showing the process of purifying the headway in the system of FIG.

As described above, the purification system according to the embodiment of the present invention may separately configure a portion for purifying the contaminated sediment and a portion for purifying the head furnace.

3 and 4, the head purification system 80 separately constitutes a portion for purifying the contaminant 94 in the above-described purification system 10. Of course, those skilled in the art will appreciate that a system for purifying contaminated sediments can also be readily configured like this system 80. The head purification system 80 includes a pump 90, drum screen 92, chemical tanks 70-1 ', 70-2', 70-3 ', 70-4', 70-5 ', 70 -6 '), first reactor 30', concentrator 32 ', centrifuge 34', conveyor device 36 ', and filtrate tank 50'. The pump 90 collects the head 84 from the stream 82. The drum screen 92 separates contaminants 94 including hydrophilic particles from the head 84. This contaminant 84 is supplied to the first reactor 30 '. The contaminants 94 transferred to the reactor 30 'are BOD, COD supplied from the chemical tanks 70-2', 70-3 ', 70-4', 70-5 ', 70-6'. The hydrophilic particles are modified into hydrophobic particles by chemicals for removing heavy metals and the like. And it transfers to the concentration tank 32 'by free fall. In this concentration tank 32 ', contaminants are separated between hydrophobic particles and water molecules, and the separated supernatant 33' is discharged or recycled through an upper wall pipe. The sludge sedimented at the bottom of the concentration tank 32 'is sludge caked in the centrifugal dehydrator 34' and automatically discharged to the outside of the dehydrator. This discharged sludge cake is solidified by the solidifying agent supplied from the chemical tank 70-1 'in the screw conveyor 38' of the conveyor apparatus 36 'and transferred to the yard designated by the belt conveyor 40'. It will be reformed to solidify with time. On the other hand, in the slurry water separated and discharged from the centrifugal dehydrator 34 ', a small amount of fine particles and visual discrimination turbidity may be caused. Reuse it.

By applying the present invention, sediment and sludge such as rivers or lakes and swamps, and sediments such as gravel and sand, and red soil can be continuously added, and mechanical and physical properties can be added to purify them continuously. This stream purification method and system, when purifying sludge or sludge, facilitates management of sludge and sludge discharge, or countermeasures against their odors, and prevents secondary pollution caused by sludge and sludge. Can be. In particular, the system can be installed in a narrow space, and can be moved according to the contaminated local situation, it is possible to easily perform the purification of rivers, lakes, swamps, etc. with a small facility.

Claims (13)

In the river purification system, First means for collecting and supplying contaminated sediments (sand, gravel and red soil, etc.) in rivers, lakes, and swamps; A medicine tank for containing and supplying a predetermined medicine; A reservoir for receiving and supplying washing water for cleaning the contaminated deposits; A washing machine for first washing the contaminated sediment supplied from the first collecting means in a washing tank containing washing water, second washing using the washing water supplied from the storage tank, and transferring the washed washing to the outside; ; A first reactor for accommodating contaminants including hydrophilic properties particles supplied from said washing tank and for converting hydrophilic particles of said contaminants into hydrophobic property particles by a chemical supplied from said chemical tank; A concentrating tank for separating the contaminants including the hydrophobic particles into sludge and supernatant, and discharging the supernatant to the outside; A centrifuge for dewatering the sludge transferred from the concentrating tank to form a sludge cake; A conveyor device for conveying the sludge cake to the outside; And a filtrate tank for receiving the sludge water separated from the sludge in the centrifuge. The method of claim 1, The stream purification system further includes a second means for collecting contaminants (head paths) including hydrophilic particles from a stream, a lake, a swamp, and the like, and supplying the contaminants to the first reactor. The method according to claim 1 or 2, The river purification system includes a second reactor for receiving and receiving the sludge water of the filtrate tank and purifying the slurry water with a predetermined medicine supplied from the medicine tank; And a filter for filtering the number of slurries supplied from the second reactor to separate the sludge and the treated water. In the river purification system, Means for collecting and supplying contaminants (headways) containing hydrophilic properties particles in rivers, lakes, and swamps; A medicine tank for containing and supplying a predetermined medicine; A reaction tank for accommodating the contaminants supplied from the sampling means and converting the hydrophilic particles of the contaminants into hydrophobic property particles by the chemicals supplied from the chemical tank; A concentrating tank for separating the contaminants including the hydrophobic particles into sludge and supernatant, and discharging the supernatant to the outside; A centrifuge for dewatering the sludge transferred from the concentrating tank to form a sludge cake; A conveyor device for conveying the sludge cake solidified by the solidifying agent supplied from the medicine tank to the outside; And a filtrate tank for receiving the sludge water separated from the sludge in the centrifuge. The method of claim 4, wherein The stream purification system further comprises a feedback device for supplying the sludge water contained in the filtrate tank to the reactor. In the river purification method, Transferring contaminated sediments (sand, gravel and red soil, etc.) from the stream to the scrubber; Supplying the washing water to the washing machine to wash the contaminated sediment and transferring the washed washing to the outside; Transferring contaminants containing hydrophilic properties particles from the wash bath to a first reactor; Supplying a chemical to the first reactor to change the hydrophilic particles of the contaminant into hydrophobic property particles; Allowing contaminants containing the hydrophobic particles to be transferred to a concentration tank and separated into sludge and supernatant water; Discharging the supernatant to the outside and transferring the sludge to a centrifuge; Dewatering the sludge to form a sludge cake, and transferring the sludge cake to the outside; And purifying the sludge water separated from the sludge in the centrifuge. The method of claim 6, The stream purification method further comprises the step of transferring a contaminant (head to) containing hydrophilic properties particles in the stream to the first reactor. The method according to claim 6 or 7, The chemicals supplied to the first reactor are at least one of an organic matter treatment agent, a heavy metal insoluble agent, and an aggregation aid, The sludge cake is a stream purification method characterized in that the solidified by the solidifying agent in the step of being transferred to the outside. The method according to claim 6 or 7, Purifying the slurry water may include transferring the slurry water to a second reactor; Supplying a predetermined chemical to the second reactor; Filtering the slurry number of the second reactor into sludge and treated water; And discharging the treated water to the outside and transferring the sludge to the outside. The method of claim 9, The stream purification method is a stream purification method characterized in that the supernatant and the treated water separated by the filtering is accommodated in a storage tank and then used as the wash water. In the river purification method, Transporting contaminants (head to head) containing hydrophilic properties particles in a stream into the reactor; Supplying a chemical to the reactor to convert the hydrophilic particles of the contaminant into hydrophobic property particles; Allowing contaminants containing the hydrophobic particles to be transferred to a concentration tank and separated into sludge and supernatant water; Discharging the supernatant to the outside and transferring the sludge to a centrifuge; Dewatering the sludge to form a sludge cake, and transferring the sludge cake to the outside; And purifying the sludge water separated from the sludge in the centrifuge. The method of claim 11, The chemicals supplied to the reactor are at least one of an organic substance treatment agent, a heavy metal insoluble agent, and a coagulation aid, The sludge cake is a stream purification method characterized in that the solidified by the solidifying agent in the step of being transferred to the outside. The method of claim 11, The stream purification method further comprises the step of transferring the sludge water to the reaction tank to perform a purification process.