CN215559798U - Sediment dehydration device is dredged in river course - Google Patents
Sediment dehydration device is dredged in river course Download PDFInfo
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- CN215559798U CN215559798U CN202122337649.0U CN202122337649U CN215559798U CN 215559798 U CN215559798 U CN 215559798U CN 202122337649 U CN202122337649 U CN 202122337649U CN 215559798 U CN215559798 U CN 215559798U
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Abstract
The utility model provides a river channel dredging sediment dehydration treatment device. The dehydration treatment device comprises a primary filtering unit, a secondary filtering unit, a precipitation unit, a conditioning unit and a filter pressing unit which are connected in sequence; the primary filtering unit is used for filtering first garbage and stones in the riverway dredging sediment to obtain first sediment; the secondary filtering unit is used for filtering second garbage and sand in the first bottom sediment to obtain second bottom sediment, and the secondary filtering unit is a 5-mesh steel wire screen; the precipitation unit is used for precipitating the second bottom sediment and obtaining third bottom sediment and supernatant; the conditioning unit is used for reducing the specific resistance of the third bottom sludge and obtaining sludge; the filter pressing unit is used for separating the sludge to obtain filtrate and filter cakes. The dehydration treatment device provided by the utility model has the advantages of rough treatment, chemical treatment and mechanical treatment of the sediment, has high automation degree, and can treat the river dredged sediment in a large scale, so that the water content of the finally obtained mud cake is reduced to 50-55%.
Description
Technical Field
The utility model belongs to the technical field of riverway sediment treatment, and particularly relates to a riverway dredging sediment dehydration treatment device.
Background
With the rapid development of industrialization, a large amount of industrial wastewater and domestic sewage are discharged into river channels, the self-cleaning function of natural water bodies is seriously weakened by the sediment of silt and pollutants entering the river, and even the basic function of the water bodies is lost, so that the comprehensive treatment engineering of the river channels becomes a research hotspot in environmental protection.
With the emphasis of China on water environment pollution treatment, the pollution of the riverway from the outside is controlled to a certain extent, namely, the exogenous pollution is reduced, but the pollutants deposited in the bottom mud are not treated correspondingly. Under the condition that the bottom sediment is disturbed, pollutants in the bottom sediment can be released to pollute the environment, namely, the pollution of the bottom sediment becomes an endogenous pollution source. And the ecological system of the water body is difficult to recover if the endogenous pollution source is not released. At present, two types of sediment disposal methods mainly comprise an in-situ remediation technology and an ex-situ remediation technology. The in-situ remediation technology is a control and remediation technology which directly adopts a physicochemical or biological method to reduce the volume of polluted sediment without dredging the sediment, reduce the amount of pollutants or reduce the solubility, toxicity or mobility of the pollutants, and reduce the release of the pollutants. The heterotopic remediation technology is to remove bottom mud from a river channel and transfer the bottom mud to a specific environment for corresponding treatment. The dredging method has the advantages of quick response and good effect, and can eliminate the influence of heavy metals and harmful refractory organic matters on the water body to a greater extent for the polluted bottom mud with higher content.
For the river channel with serious pollution, the in-situ remediation technology cannot meet the requirement of treatment, and the problem of bottom mud pollution can be effectively solved only by removing the bottom mud from the river channel and then disposing the bottom mud. At present, in the dredging of a river channel, the disposal method of bottom mud after dredging mainly comprises three methods of stacking, landfill and deep sea throwing; the method needs to occupy a large amount of land resources for stacking, takes long time, occupies a large amount of cultivated land for landfill, has high cost for deep sea disposal, and causes pollution to the ocean environment.
Therefore, it is highly desirable to provide a sludge dewatering treatment apparatus which can realize effective separation of sludge impurities and can rapidly dewater the sludge.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dehydration treatment device with the functions of rough treatment, chemical treatment and mechanical treatment of bottom mud, which has high automation degree, can treat the dredged bottom mud of a river channel in a large scale, reduces the water content of a finally obtained mud cake to 50-55%, and is convenient to recycle.
In order to achieve the above object, the present invention provides a device for dewatering riverway dredging sediment, comprising:
the primary filtering unit is used for filtering first garbage and stones in the riverway dredging sediment to obtain first sediment;
the inlet end of the secondary filtering unit is connected with the outlet end of the first sediment of the primary filtering unit, the secondary filtering unit is used for filtering second garbage and gravel in the first sediment to obtain second sediment, the size of the first garbage and gravel is larger than that of the second garbage and gravel, and the secondary filtering unit is a 5-mesh steel wire screen;
the inlet end of the sedimentation unit is connected with the second bottom sediment outlet end of the secondary filtering unit, and the sedimentation unit is used for settling the second bottom sediment and obtaining third bottom sediment and supernatant;
the inlet end of the conditioning unit is connected with the third bottom mud outlet end of the precipitation unit, and the conditioning unit is used for reducing the specific resistance of the third bottom mud and obtaining sludge;
and the inlet end of the filter pressing unit is connected with the sludge outlet end of the conditioning unit, and the filter pressing unit is used for separating the sludge to obtain filtrate and filter cakes.
In a specific embodiment, the primary filtering unit is a grating machine, and the spacing between grating teeth of the grating machine is 15-20 mm.
In a specific embodiment, the filter press unit is a filter cloth crimping filter press.
In a specific implementation mode, the filter pressing device further comprises a sewage treatment unit, wherein a first liquid inlet of the sewage treatment unit is connected with a supernatant liquid outlet of the precipitation unit, and a second liquid inlet of the sewage treatment unit is connected with a filtrate liquid outlet of the filter pressing unit.
In a specific embodiment, a liquid outlet of the sewage treatment unit is connected with a liquid inlet of the filter pressing unit, and clear water obtained by purification of the sewage treatment unit is used for cleaning filter cloth of the filter pressing unit.
In a specific embodiment, the system further comprises a first horizontal screw conveyor, wherein the first horizontal screw conveyor is used for conveying the river dredged sediment to the primary filtering unit.
In a specific implementation mode, the system further comprises a second horizontal spiral conveyor, wherein a feed inlet of the second horizontal spiral conveyor is connected with a first sediment outlet end of the primary filtering unit, and a discharge outlet of the second horizontal spiral conveyor is connected with an inlet end of the secondary filtering unit.
In a specific embodiment, the device further comprises a sludge pump, wherein one end of the sludge pump is connected with the third sediment outlet end of the sedimentation unit, and the other end of the sludge pump is connected with the inlet end of the conditioning unit.
In a specific implementation mode, the device further comprises a screw pump, wherein one end of the screw pump is connected with the sludge outlet end of the conditioning unit, and the other end of the screw pump is connected with the inlet end of the filter pressing unit.
The beneficial effects of the utility model at least comprise:
the river channel dredging sediment dehydration treatment device comprises a primary filtering unit, a secondary filtering unit, a precipitation unit, a conditioning unit and a filter pressing unit which are sequentially connected, wherein the secondary filtering unit is a 5-mesh steel wire screen; the river channel dredging sediment is filtered through a primary filtering unit to obtain first garbage and stones with large sizes to obtain first sediment, the first sediment is filtered through a 5-mesh steel wire screen to obtain second sediment with small and uniform sizes, the second sediment is precipitated and separated to obtain third sediment and supernatant, the third sediment and a sludge conditioner are mixed to be chemically conditioned, and the third sediment is small in size, so that the contact area of the third sediment and the sludge conditioner is large and uniform in mixing, the chemical conditioning effect is better, the sludge specific resistance can be greatly reduced, the sludge filtering speed and the dehydration depth are remarkably improved, the water content of a filter cake obtained after the sludge conditioned by a conditioning unit is filtered by a filter pressing unit can be reduced to 50-55%, and subsequent resource utilization is facilitated.
The river channel dredging sediment dehydration treatment device provided by the utility model has the advantages of rough treatment, chemical treatment and mechanical treatment of the sediment, high automation degree and capability of treating the river channel dredging sediment in a large scale.
The first-stage filtering unit and the second-stage filtering unit which are connected in sequence are adopted to filter garbage, stones and stone sand, and the filter has the advantages of high filtering speed and good filtering effect.
The filter pressing unit provided by the utility model is a filter cloth rolling type filter press, the filter press has small floor area and high production efficiency, the single production cycle of the filter press is less than 1 hour, the mud discharging time is less than 1 minute, and the filter cloth cleaning time is less than 1 minute; and the filter cloth curling filter press can realize automatic mud discharging, automatic cleaning and automatic drying, has high automation degree, can realize unattended operation, avoids the contact of operating personnel and sludge, and has good safety performance.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic structural diagram of a device for dewatering dredged sediment in a river according to an embodiment of the present invention.
Description of reference numerals:
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100 | First- |
10 | Two- |
20 |
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30 | |
40 | |
50 |
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61 | Second |
62 | |
63 |
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70 |
Detailed Description
Embodiments of the utility model will be described in detail below with reference to the accompanying drawings, but the utility model can be defined and covered by the claims in many different embodiments.
As shown in fig. 1, the present invention provides a river dredging sediment dewatering device 100, comprising:
the primary filtering unit 10 is used for filtering first garbage and stones in the river dredging sediment to obtain first sediment;
the inlet end of the secondary filtering unit 20 is connected with the outlet end of the first sediment of the primary filtering unit 10, the secondary filtering unit 20 is used for filtering second garbage and gravel in the first sediment to obtain second sediment, the size of the first garbage and gravel is larger than that of the second garbage and gravel, and the secondary filtering unit 20 is a 5-mesh steel wire screen;
a sedimentation unit 30, an inlet end of the sedimentation unit 30 is connected with a second bottom sediment outlet end of the secondary filtration unit 20, and the sedimentation unit is used for settling the second bottom sediment and obtaining a third bottom sediment and a supernatant;
the inlet end of the conditioning unit 40 is connected with the third sediment outlet end of the precipitation unit 30, and the conditioning unit 40 is used for reducing the specific resistance of the third sediment and obtaining sludge;
the inlet end of the filter pressing unit 50 is connected with the sludge outlet end of the conditioning unit 40, and the filter pressing unit 50 is used for separating the sludge to obtain filtrate and filter cakes.
In the utility model, the river dredging sediment dehydration treatment device 100 comprises a primary filtering unit 10, a secondary filtering unit 20, a precipitation unit 30, a conditioning unit 40 and a filter pressing unit 50 which are sequentially connected, wherein the secondary filtering unit 20 is a 5-mesh steel wire screen; the river channel dredging sediment is filtered through a primary filtering unit to obtain first garbage and stones with large sizes to obtain first sediment, the first sediment is filtered through a 5-mesh steel wire screen to obtain second sediment with small and uniform sizes, the second sediment is precipitated and separated to obtain third sediment and supernatant, the third sediment and a sludge conditioner are mixed to be chemically conditioned, and the third sediment is small in size, so that the contact area of the third sediment and the sludge conditioner is large and uniform in mixing, the chemical conditioning effect is better, the sludge specific resistance can be greatly reduced, the sludge filtering speed and the dehydration depth are remarkably improved, the water content of a filter cake obtained after the sludge conditioned by a conditioning unit is filtered by a filter pressing unit can be reduced to 50-55%, and subsequent resource utilization is facilitated.
Preferably, the primary filtering unit 10 is a grating machine, and the distance between grating teeth of the grating machine is 15-20 mm.
In this embodiment, the river dredging bottom mud is conveyed to the first-stage filtering unit 10 by the first horizontal screw conveyor 61 for coarse filtering to filter out the first garbage and stone blocks with larger sizes to obtain the first bottom mud, the first bottom mud is conveyed to the second-stage filtering unit 20 by the second horizontal screw conveyor 62 to filter out the second garbage and sand blocks with smaller sizes, the two-stage filtering effect is better, and the second bottom mud obtained by filtering is smaller in size and more uniform; the second waste and sand filtered by the secondary filter unit 20 can be used for landfill.
Specifically, the first horizontal screw conveyor 61 is used for conveying the river dredged sediment to the primary filtering unit 10; the feed inlet of the second horizontal screw conveyer 62 is connected with the first sediment outlet end of the first-stage filtering unit 10, and the discharge outlet of the second horizontal screw conveyer 62 is connected with the inlet end of the second-stage filtering unit 20.
In this embodiment, adopt 5 mesh steel wire screen to carry out the secondary filter, have the advantage that screening efficiency is high, and can prevent the adhesion of moist fine material effectively, avoid stifled hole phenomenon.
In this embodiment, the settling time of the settling unit 30 is 1-2 h, so that the second bottom sludge is settled for a sufficient time to be separated into a third bottom sludge and a supernatant, the third bottom sludge is pumped into the conditioning unit 40 by a sludge pump 63, specifically, one end of the sludge pump 63 is connected with the outlet end of the third bottom sludge of the settling unit 30, and the other end is connected with the inlet end of the conditioning unit 40; the supernatant was purified in the next step.
The conditioning unit 40 reduces the specific resistance of the sludge by adding a sludge conditioner, the sludge conditioner is preferably an organic sludge conditioner, and the organic sludge conditioner has the characteristics of no hazardous chemical component, no increase of solid content, no reduction of the inherent calorific value of the sludge, small dosage, neutral PH and the like, and does not influence the subsequent sewage treatment.
In this embodiment, the conditioning unit 40 further includes a dosing port and a stirring device, the sludge conditioner is added through the dosing port, and the stirring device is used for uniformly mixing the third bottom sludge and the sludge conditioner, so as to sufficiently react, thereby greatly reducing the specific resistance of the sludge and significantly improving the filtering speed and the dewatering depth of the sludge.
It should be noted that the type of the sludge conditioner used by the conditioning unit 40 is determined according to actual production requirements, such as polyacrylamide, etc., and is prepared by a company or purchased by a third party, and the sludge conditioner is not within the protection scope of the present invention.
Preferably, the filter press unit 50 is a filter cloth crimping filter press.
The filter pressing unit provided by the utility model is a filter press with a curled filter cloth, the filter press has small floor area and high production efficiency, the single production cycle of the filter press is less than 1 hour, the mud discharging time is less than 1 minute, and the filter cloth cleaning time is less than 1 minute; and the filter cloth curling filter press can realize automatic mud discharging, automatic cleaning and automatic drying, has high automation degree, can realize unattended operation, avoids the contact of operating personnel and sludge, and has good safety performance.
In an embodiment, the sludge chemically conditioned by the conditioning unit 40 is sent to a filter cloth rolling filter press by a screw pump 64, wherein one end of the screw pump 64 is connected to the sludge outlet end of the conditioning unit 40, and the other end is connected to the inlet end of the filter press unit 50.
Preferably, the filter pressing device further comprises a sewage treatment unit 70, wherein a first liquid inlet of the sewage treatment unit 70 is connected with a supernatant liquid outlet of the precipitation unit 30, and a second liquid inlet of the sewage treatment unit 70 is connected with a filtrate liquid outlet of the filter pressing unit 50.
In this embodiment, the sewage treatment unit 70 is a CRHIC-SED integrated sewage treatment unit.
The CRHIC-SED integrated sewage treatment unit can adapt to the influence of sudden change of water quality and water quantity, and can be divided into different zones according to the environmental functions of the sites of projects, and the treated effluent can meet the requirements of the first-class A emission standard of pollutant emission standards of urban sewage treatment plants (GB 18918-.
Preferably, a liquid outlet of the sewage treatment unit 70 is connected with a liquid inlet of the filter pressing unit 50, and clean water obtained by purification of the sewage treatment unit is used for cleaning filter cloth of the filter pressing unit.
In this embodiment, the clean water purified by the sewage treatment unit 70 is used for cleaning the filter cloth of the filter pressing unit 50, and in other embodiments, the clean water can be directly discharged or recycled for use in other systems.
Taking the sediment of a certain section of the Liuyang river in Changsha city, Hunan province as an example, the dehydration process of the dredged sediment of the river channel is illustrated, and specifically:
the river dredging sediment desilting device is characterized in that river dredging sediment desilted by a dredger is pumped to a river dredging sediment dehydration treatment device on the bank side through a sediment pump, firstly, the river dredging sediment is conveyed to a mechanical grid through a first horizontal spiral conveyer to filter out stones, garbage and other substances with large particle sizes to obtain first sediment, then, the obtained first sediment is sieved through a 5-mesh steel wire screen by a second horizontal spiral conveyer and flows into a precipitation unit, the sieved substances with small particle sizes such as gravels, garbage and the like are transported out for landfill, the second sediment flowing into a sedimentation tank is precipitated for 1-2 hours, the precipitated supernatant is sent to CRHIC-SED integrated sewage treatment equipment through a water pump to purify sewage, the third sediment on the lower portion is pumped into a conditioning unit through a sludge pump, an organic sludge conditioner is added into the conditioning unit to condition, and then, the conditioned sludge is sent to a filter cloth curl type filter press to be dehydrated, and (3) transporting the dewatered mud cake out for resource utilization, sending filtrate of the filter press to CRHIC-SED integrated sewage treatment equipment for sewage purification, and conveying purified clear water back to the filter cloth rolling type filter press for filter cloth cleaning through a pipeline.
The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions and substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.
Claims (9)
1. The utility model provides a river course dredging sediment dehydration processing apparatus which characterized in that includes:
the primary filtering unit (10) is used for filtering first garbage and stones in the riverway dredging bottom mud and obtaining first bottom mud;
the inlet end of the secondary filtering unit (20) is connected with the outlet end of the first sediment of the primary filtering unit (10), the secondary filtering unit (20) is used for filtering second garbage and gravel in the first sediment to obtain second sediment, the size of the first garbage and gravel is larger than that of the second garbage and gravel, and the secondary filtering unit (20) is a 5-mesh steel wire screen;
a sedimentation unit (30), wherein the inlet end of the sedimentation unit (30) is connected with the second sediment outlet end of the secondary filtration unit (20), and the sedimentation unit (30) is used for settling the second sediment and obtaining a third sediment and supernatant;
the inlet end of the conditioning unit (40) is connected with the third sediment outlet end of the precipitation unit (30), and the conditioning unit (40) is used for reducing the specific resistance of the third sediment and obtaining sludge;
the filter pressing unit (50), the entrance point of filter pressing unit (50) with the mud exit end of recuperating unit (40) is connected, filter pressing unit (50) are used for separating mud obtains filtrating and filter cake.
2. The device for dehydrating the dredged sediment of the river channel according to claim 1, wherein the primary filtering unit (10) is a grating machine, and the distance between grating teeth of the grating machine is 15-20 mm.
3. The device for dehydrating the dredged sediment of the river according to claim 1, wherein the filter press unit (50) is a filter cloth crimping filter press.
4. The apparatus for dewatering dredged sediment according to claim 1, further comprising a sewage treatment unit (70), wherein a first liquid inlet of the sewage treatment unit (70) is connected to a supernatant liquid outlet of the sedimentation unit (30), and a second liquid inlet of the sewage treatment unit (70) is connected to a filtrate liquid outlet of the filter pressing unit (50).
5. The device for dehydrating the dredged sediment of the river according to claim 4, wherein the liquid outlet of the sewage treatment unit (70) is connected with the liquid inlet of the filter pressing unit (50), and the clean water purified by the sewage treatment unit (70) is used for cleaning the filter cloth of the filter pressing unit (50).
6. The apparatus for dehydrating riverway dredging sludge according to claim 1, further comprising a first horizontal screw conveyor (61), wherein the first horizontal screw conveyor (61) is used for conveying riverway dredging sludge to the primary filtering unit (10).
7. The apparatus for dehydrating the dredged sediment of a river according to claim 1, further comprising a second horizontal screw conveyor (62), wherein an inlet of the second horizontal screw conveyor (62) is connected to the first sediment outlet end of the primary filtering unit (10), and an outlet of the second horizontal screw conveyor (62) is connected to the inlet end of the secondary filtering unit (20).
8. The river dredged sediment dehydration treatment apparatus according to claim 1, further comprising a sludge pump (63), wherein one end of the sludge pump (63) is connected to the third sediment outlet end of the sedimentation unit (30), and the other end is connected to the inlet end of the conditioning unit (40).
9. The riverway dredging sediment dehydration treatment apparatus according to claim 1, further comprising a screw pump (64), wherein one end of the screw pump (64) is connected to the sludge outlet end of the conditioning unit (40), and the other end is connected to the inlet end of the filter pressing unit (50).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122337649.0U CN215559798U (en) | 2021-09-26 | 2021-09-26 | Sediment dehydration device is dredged in river course |
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| CN202122337649.0U CN215559798U (en) | 2021-09-26 | 2021-09-26 | Sediment dehydration device is dredged in river course |
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| CN215559798U true CN215559798U (en) | 2022-01-18 |
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