CN111233291A - Sediment treatment method and system in dredging, dehydrating and drying engineering - Google Patents
Sediment treatment method and system in dredging, dehydrating and drying engineering Download PDFInfo
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- CN111233291A CN111233291A CN202010045336.5A CN202010045336A CN111233291A CN 111233291 A CN111233291 A CN 111233291A CN 202010045336 A CN202010045336 A CN 202010045336A CN 111233291 A CN111233291 A CN 111233291A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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Abstract
The invention provides a bottom mud treatment method and a system in dredging, dehydrating and drying engineering, wherein the bottom mud treatment method comprises the following steps: dredging the bottom sludge to a sedimentation tank, wherein in the process of dredging the bottom sludge to the sedimentation tank through a transmission system, an agent is added into the transmission system, and the bottom sludge and the agent are mixed in the transmission system, so that the bottom sludge is separated from water in the sedimentation tank; discharging supernatant obtained after mud-water separation in the sedimentation tank to the original river; and (4) dehydrating and drying the slurry precipitated in the precipitation tank. The invention can save the subsequent water treatment cost and improve the bottom mud treatment efficiency.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a bottom mud treatment method and a bottom mud treatment system in dredging, dehydrating and drying engineering.
Background
The river channel comprises an upper water body and bottom mud, wherein the water quality of the upper water body generally reaches the surface water index, however, the bottom mud of the river channel comprises various organic mineral components and can have all conditions of black and odorous bottom mud due to the decomposition of sewage, nitrogen and phosphorus fertilizers, other organic matters and the like discharged by human life. Generally, in a dredging project, the bottom sediment of a river channel needs to be dredged, and the dredging often disturbs the bottom sediment to release a large amount of harmful substances to be suspended in a water body, so that tail water in the dredging project does not reach the standard.
In the prior art, sediment is dredged to a sedimentation tank, the sediment naturally settles in the sedimentation tank, supernatant fluid naturally settled is directly discharged to an original river channel, the sediment is dehydrated, and squeezed water obtained by dehydration and drying is discharged to the original river channel after tail water treatment. This process is complicated and inefficient.
Disclosure of Invention
The invention solves the problems that the existing bottom mud treatment mode has complex flow and low bottom mud treatment efficiency.
In order to solve the problems, the invention provides a bottom mud treatment method in dredging, dehydrating and drying engineering, which comprises the following steps:
a. dredging the sediment to the sedimentation basin, wherein during dredging of the sediment to the sedimentation basin by means of the transport system, an agent is added to the transport system, in which the sediment and the agent are mixed such that the sediment is mud-water separated in the sedimentation basin;
b. discharging the supernatant obtained after mud-water separation in the sedimentation tank to the original river;
c. and dehydrating and drying the slurry precipitated in the precipitation tank.
Optionally, step c is followed by: d. and discharging tail water obtained by dehydrating and drying the slurry to the sedimentation tank.
Optionally, step c is followed by: e. and discharging the tail water obtained by dehydrating and drying the slurry to a tail water tank, and then discharging the tail water to the original river channel through the tail water tank, or directly discharging the tail water obtained by dehydrating and drying the slurry to the original river channel.
Optionally, the agent is used to enhance the sediment ion concentration.
Optionally, the agent is used to adsorb particulate matter in the substrate sludge into agglomerates.
Optionally, the agents include a first agent for enhancing the substrate sludge ion concentration and a second agent for adsorbing particulate matter in the substrate sludge into agglomerates; the step of adding a pharmaceutical agent to the delivery system, where the sludge and pharmaceutical agent are mixed comprises:
after the first agent is added to the substrate sludge, the second agent is added to the substrate sludge.
The invention also provides a bottom sediment treatment system suitable for the bottom sediment treatment method, which comprises the following steps: the device comprises a dosing device, a transmission system and a sedimentation tank; the dosing device is communicated to the transmission system, and the transmission system is communicated to the sedimentation tank.
Optionally, the conveying system includes mixing arrangement, pan feeding pipe and discharging pipe, the pan feeding pipe with mixing arrangement's pan feeding mouth is connected, the one end of discharging pipe with mixing arrangement's discharge gate is connected, the other end of discharging pipe with the sedimentation tank is connected.
Optionally, the mixing device includes at least two mixers, and the dosing devices are equal in number to the mixers and connected in a one-to-one correspondence.
Alternatively, the mixers are connected to each other in series by connecting pipes.
According to the embodiment of the invention, the medicament is added into the transmission system, and the medicament and the bottom mud are stirred by the mixing device in the transmission system, so that the medicament and the bottom mud fully react, the bottom mud is precipitated in the sedimentation tank once out of the transmission system, harmful substances are precipitated out of a water body along with the mud, and the supernatant in the sedimentation tank or the tail water obtained by dewatering and drying the bottom mud reach the standard and can be directly discharged to an original river channel without tail water treatment.
Drawings
FIG. 1 is a schematic view of an embodiment of a method for treating bottom mud in a dredging, dewatering and drying process according to the present invention;
FIG. 2 is a schematic view of another embodiment of the method for treating bottom mud in the dredging, dewatering and drying process of the present invention;
FIG. 3 is a schematic view of another embodiment of the method for treating bottom mud in the dredging, dewatering and drying process of the invention
FIG. 4 is a schematic view of an embodiment of the bottom mud treatment system of the present invention;
FIG. 5 is a schematic view of another embodiment of the bottom mud treatment system of the present invention
FIG. 6 is a schematic view of another embodiment of the bottom mud treatment system of the present invention.
Description of reference numerals:
1-a mixing device; 2-a feeding pipe; 3, a discharge pipe; 4-a dosing device; 5-a sedimentation tank; 6-connecting pipe; 11-a feeding port of the mixing device; 12-discharge port of mixing device; 13-the dosing port of the mixing device.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the prior art, sediment is usually dredged to a sedimentation tank, naturally settled for a period of time, then the supernatant is discharged to the original river channel, the sediment is dehydrated, tail water obtained by dehydration is discharged to a tail water pool, tail water treatment operation is performed in the tail water pool, and the tail water is discharged to the original river channel after reaching the standard.
The tail water treatment operation may include two modes:
firstly, performing targeted removal treatment according to excessive components in tail water, for example, adding a nitrogen removal agent when nitrogen in the tail water exceeds the standard, and adding a phosphorus removal agent when phosphorus in the tail water exceeds the standard. It has the following problems: when one component is removed, the other component may exceed the standard, for example, when nitrogen is removed, the content of phosphorus in tail water may increase, and phosphorus needs to be further treated, and when phosphorus is treated, other harmful components may increase, and then the other harmful components need to be further treated, so that the working procedure of tail water treatment is increased, the flow is long, and the operation is more complicated.
Secondly, adding the medicament to precipitate the overproof components along with the mud. It has the following problems: after the medicament is added into the tail water tank, the supernatant is simply filtered and then discharged to the original river channel, and the precipitate needs to be dehydrated again, namely the whole process needs to be filtered twice and dehydrated twice, double equipment possibly needs to be prepared, so that the cost is high, and the process is complicated.
In addition to the above-mentioned disadvantages related to tail water treatment, after natural sedimentation, naturally sedimented supernatant is discharged to the original river, and the supernatant still contains a large amount of mud due to limited sedimentation effect of natural sedimentation, and the direct discharge of mud containing harmful substances can cause adverse effects on the original water ecosystem.
Therefore, the existing sediment treatment mode/flow is shown, the main treatment operation of the overproof components in the sediment is put into the tail water treatment step, and the engineering efficiency and the purification effect of the water discharged to the original river are not satisfactory.
In view of the above-mentioned drawbacks of the conventional sludge treatment method, in one embodiment of the present invention, the sludge and water are separated before the sludge is dewatered, so that the tail water contains only a small amount of harmful components, and the tail water treatment operation is not required. The inventor has found that when the concept of the scheme of the embodiment of the invention is carried out, it is better not to add chemical agents into the sedimentation tank for treatment operations such as sedimentation, because the sedimentation tank is generally large, if chemical agents are directly added into the sedimentation tank, the added chemical agents cannot be sufficiently mixed with the sediment, for the sedimentation tank, if a mixer/stirring device is added into the sedimentation tank, firstly, the sedimentation tank is not consistent with the function of sedimentation, and in the actual dredging engineering, the sediment cannot stay in the sedimentation tank for too long time for ensuring the dredging efficiency, if the chemical agents are added into the sedimentation tank for stirring for a certain time, then the stirring is stopped, and the sedimentation is carried out for a certain time, so that the sediment stays in the sedimentation tank for a long time, which is not consistent with the engineering efficiency requirement; secondly, because the quantitative analysis of the medicament quantity can not be carried out, the proper medicament quantity can not be determined, and the reasonable balance between the precipitation effect and the medicament cost can not be made, the operability on the engineering is poor.
Based on the consideration, the invention provides a bottom mud treatment method in dredging, dehydrating and drying engineering. FIG. 1 is a schematic view of a method for treating bottom mud according to an embodiment of the present invention.
As shown in fig. 1, the bottom mud treatment method comprises the following steps:
a. dredging the sediment to the sedimentation basin, wherein during dredging of the sediment to the sedimentation basin by means of the transport system, an agent is added to the transport system, in which the sediment and the agent are mixed such that the sediment is mud-water separated in the sedimentation basin;
b. discharging the supernatant obtained after mud-water separation in the sedimentation tank to the original river;
c. and dehydrating and drying the slurry precipitated in the precipitation tank.
In the sediment dredging process, the sediment dredged to the sedimentation tank becomes a mud-water mixture with high water content due to the disturbance of the sediment. When carrying the bed mud to the sedimentation tank through transmission system, through the blender among the transmission system in adding the bed mud of medicament addition transport through charge device for medicament and bed mud stirring mix, the intensive reaction, make the bed mud for with medicament intensive mixing in arriving the sedimentation tank, the bed mud just rapid mud-water separation when arriving the sedimentation tank, wherein, the suspended solid in the bed mud is condensed by the medicament effect, and subsides by the action of gravity.
The reagent and the sediment are fully mixed in the transmission system, so that the sediment can be quickly separated into mud and water after reaching the sedimentation tank, wherein the ammonia nitrogen, the phosphorus and other components are in the sediment, so that the ammonia nitrogen, the phosphorus and other components are precipitated along with the sediment, and the supernatant obtained after the mud and water separation only contains a small amount of sediment, namely only contains few ammonia nitrogen, phosphorus and other components, so that the supernatant in the sedimentation tank can be ensured to be water which reaches the standard in related indexes and can be directly discharged.
As the components such as ammonia nitrogen, phosphorus and the like exist in the mud, the water index can reach the standard only by separating the mud from the water. After the precipitated slurry is subjected to dehydration and drying treatment, mud-water separation is ensured due to the action of a medicament, through dehydration and drying, components such as ammonia nitrogen, nitrogen and phosphorus are left in the dehydrated dry sludge, and the water obtained through dehydration and drying only contains a small amount of sludge and further contains a small amount of components such as ammonia nitrogen, nitrogen and phosphorus, so that the water obtained through dehydration and drying is water which reaches the standard in related indexes and can be directly discharged.
Specifically, first, the bottom mud may be transported to the settling pond by a mud pump or a cutter suction vessel through a transport system. In the conveying process, the medicament is added into the bottom mud through a dosing device. One or more agents may be added.
Secondly, sediment is rapidly separated from water in a sedimentation tank, supernatant after mud-water separation is discharged to an original river channel, optionally, the supernatant can be directly discharged to the original river channel, the supernatant can also be conveyed to a tail water tank and then directly discharged to the original river channel through the tail water tank, wherein the tail water tank can only be a buffer tank for leading the supernatant to the original river channel, the supernatant is directly discharged to the original river channel after being not processed in the tail water tank, the tail water tank can also comprise a simple filtering function, large particles in the supernatant are filtered, and the supernatant after the large particles are filtered is discharged to the original river channel.
In addition, the sludge precipitated after mud-water separation is dehydrated, and the dehydration mode can be a plate-and-frame filter pressing mechanical dehydration mode, and other dehydration modes can also be adopted, and the dehydration mode is not limited here. Optionally, the step c specifically includes: and pumping the slurry precipitated in the sedimentation tank into a homogenization tank for conditioning, and dehydrating the conditioned slurry. After the slurry is conditioned, the water quantity and the water quality in the slurry can be homogenized, and the fluctuation of the water quantity and the water quality of the slurry subjected to dehydration treatment is reduced.
Optionally, as shown in fig. 2, step c further includes: d. and discharging tail water obtained by dehydrating and drying the slurry to the sedimentation tank.
During the dehydration and drying of the slurry, the medicament in the slurry can be filtered out along with water, and tail water containing the medicament is discharged to the sedimentation tank, so that the medicament promotes the mud-water separation of bottom mud in the sedimentation tank again, the recycling of the medicament is realized, the mud-water separation in the sedimentation tank is more thorough, and the water discharged to the original river channel is cleaner.
Optionally, as shown in fig. 3, step c further includes: e. and discharging the tail water obtained by dehydrating and drying the slurry to a tail water tank, and then discharging the tail water to the original river channel through the tail water tank, or directly discharging the tail water obtained by dehydrating and drying the slurry to the original river channel.
After the precipitated slurry is subjected to dehydration and drying treatment, mud-water separation is ensured due to the action of a medicament, through dehydration and drying, components such as ammonia nitrogen, nitrogen and phosphorus are left in the dehydrated dry sludge, and the water obtained through dehydration and drying only contains a small amount of sludge and further contains a small amount of components such as ammonia nitrogen, nitrogen and phosphorus, so that the water obtained through dehydration and drying is up to the standard of related indexes and can be directly discharged, and the tail water obtained through dehydration and drying can be discharged to the original river channel without performing tail water treatment operation on the tail water.
The tail water pool can be only a buffer pool for leading tail water to the original river channel, and the tail water is directly discharged to the original river channel after being not treated.
According to the embodiment of the invention, the medicament is added into the transmission system, and the medicament and the bottom mud are stirred by the mixing device in the transmission system, so that the medicament and the bottom mud fully react, the bottom mud is precipitated in the sedimentation tank once out of the transmission system, harmful substances are precipitated out of a water body along with the mud, and the supernatant in the sedimentation tank or the tail water obtained by dewatering and drying the bottom mud reach the standard and can be directly discharged to an original river channel without tail water treatment.
Optionally, an agent for enhancing the ion concentration of the sediment is added in the step a.
The river sediment is changed into a mud-water mixture with higher water content after dredging and disturbance, the surface of the solid colloidal particles is of an electric double layer structure, the concentration of counter ions at the surface of the solid colloidal particles is the largest under the electric double layer structure, and the concentration of the counter ions is lower along with the larger outward distance of the surface of the colloidal particles and is finally equal to the concentration of ions in the solution. After the medicament for enhancing the concentration of the sediment ions is added into the colloidal particles, the thickness of the diffusion layer is reduced, when the two colloidal particles are close to each other, the thickness of the diffusion layer is reduced, and the potential is reduced, so that the repulsion among the colloidal particles is reduced, the resultant force of the repulsion and the suction among the colloidal particles is changed from the repulsion to the suction, and the colloidal particles are rapidly condensed.
Optionally, the agent can also enhance the concentration of particles with different charges such as different-sign ions and different-sign colloidal particles in the sediment (the particles with different charges refer to particles with different charges from the original solid colloidal particles of the sediment), and neutralize partial charges of the solid colloidal particles by the adsorption effect of the original solid colloidal particles and the particles with different charges in the sediment, so that electrostatic repulsion is reduced, and the solid colloidal particles are easy to approach other particles and adsorb each other.
Optionally, the agent added in step a is used to adsorb particulate matter in the substrate sludge into agglomerates.
The drug can be a high polymer, the high polymer has chemical groups which can act with certain parts on the surface of the colloidal particles, when the high polymer is contacted with the colloidal particles, the groups can generate special reaction with the surface of the colloidal particles to be adsorbed mutually, the rest parts of the high polymer molecules extend in the solution and can be adsorbed with the colloidal particles with vacant positions on the other surface, so that the polymer plays a role of bridging connection, the colloidal particles and the colloidal particles are mutually connected and aggregated, high polymer molecular chains are fixed on the surfaces of different particles, polymer bridges are formed among the particles, the high polymer molecular chains are mutually connected together through various mechanical, physical and chemical actions to form a net shape, suspended fine particles are further caught, and finally, the suspended fine particles are sunk and dropped under the action of gravity.
Optionally, the charge of the agent added in step a is opposite to the surface charge of the sediment particles.
The electrokinetic potential of the surface of the sediment particles is one of the reasons for particle aggregation resistance, and the agent with charges opposite to those of the surface of the sediment particles is added, so that the electrokinetic potential can be reduced, and the sediment particles are condensed. Here the sediment particles are sediment middle micelles.
Optionally, the agent comprises a first agent for enhancing the substrate sludge ion concentration and a second agent for adsorbing particulate matter in the substrate sludge into agglomerates. When adding transmission system with the medicament, at first add first medicament to reduce the repulsion between the bed mud particulate matter, reduce the suction between bed mud particulate matter and the water, make particulate matter and separation of water in the bed mud, add the second medicament again, adsorb the particulate matter of suspension in the bed mud and connect, and form netted, take the winding in the lump with tiny particulate matter and deposit.
Alternatively, as shown in fig. 4, the substrate sludge treatment system comprises two dosing devices, the two dosing devices are respectively connected with the dosing ports of two mixers connected in series, the substrate sludge flows from the former mixer to the latter mixer, wherein the dosing device connected with the dosing port of the former mixer is used for adding a first medicament, and the dosing device connected with the dosing port of the latter mixer is used for adding a second medicament. Wherein, first medicament is the medicament that can strengthen sediment ion concentration, and the second medicament is arranged in adsorbing the particle in the sediment and agglomerates, because of preceding blender is fixed with the latter blender order, and the sediment flows through preceding blender earlier and flows to the latter blender again, so, under the condition that two charge device add the medicament simultaneously, first medicament is actually added earlier, adds behind the second medicament, so, can guarantee that medicament and sediment stirring are abundant, the reaction is abundant.
With respect to the agents described in the various embodiments of the present invention, one skilled in the art can select suitable existing products based on the teachings of the inventive concept.
Optionally, the bottom mud flow rate in the conveying system is determined through a mud pump for extracting the bottom mud and a relay pump for conveying the bottom mud, and the adding amount of the medicament is determined based on the bottom mud flow rate.
As each slurry pump and each relay pump leave a factory and have corresponding indexes including lift, power, design flow and the like, the dredging flow of the bottom mud can be calculated through the parameters of the pumps.
The embodiment of the invention takes the river sediment as an example for explanation, but the sediment treatment system and the method in the dredging, dehydrating and drying engineering of the invention are not limited to be applied to the treatment of the river sediment, and can also be applied to the treatment of water areas such as reservoirs, lakes, seas and the like.
The present invention provides a bottom mud treatment system suitable for the bottom mud treatment method described in the above embodiments, and fig. 5 is a schematic view of an embodiment of the bottom mud treatment system according to the present invention.
As shown in fig. 5, the bottom mud treatment system comprises: a dosing device 4, a transmission system and a sedimentation tank 5; the dosing device 4 is communicated to the transmission system, and the transmission system is communicated to the sedimentation tank 5.
Wherein, transmission system is used for transmitting the bed mud, and transmission system one end pipeline and 5 intercommunications of sedimentation tank to the bed mud that will extract from the river course bottom transports to sedimentation tank 5. Medicine device 4 and transmission system intercommunication add the medicament in transmission system for realize the mixture of medicament and bed mud in the bed mud transmission process, and then after the mixture of bed mud and medicament reachd sedimentation tank 5, mud-water separation rapidly.
So, both can make full use of the kinetic energy of bed mud transmission course for bed mud and medicament intensive mixing mix, practiced thrift the time that is used for bed mud and medicament stirring to mix specially again, make bed mud higher in sedimentation tank 5 mud-water separation's degree, quality of water is more pure, has also practiced thrift the treatment time simultaneously, has improved engineering efficiency.
Optionally, as shown in fig. 5 and fig. 6, the conveying system includes a mixing device 1, a feeding pipe 2 and a discharging pipe 3, the feeding pipe 2 is connected to a feeding port 11 of the mixing device 1, one end of the discharging pipe 3 is connected to a feeding port 12 of the mixing device 1, and the other end of the discharging pipe 3 is connected to the sedimentation tank 5.
The medicament is added into the sediment through the transmission system, the medicament is further added into the sediment, the pipe diameter of a transmission pipeline in the transmission system is small, the flow rate of the sediment flowing through the transmission system is relatively small within a certain time, the smaller the flow rate of the sediment is, the more the medicament can be fully mixed, compared with a large amount of sediment in the sedimentation tank 5, the sediment transmitted in the transmission system naturally has better mixing conditions, the mixing device 1 is arranged in the transmission system, the sediment transmitted in the transmission system is stirred and mixed with the medicament in the mixing device 1, the sediment and the medicament are ensured to be fully mixed, the sediment-medicament mixture after stirring and mixing is transported to the sedimentation tank 5 through the transmission pipeline, the sediment-medicament mixture reaching the sedimentation tank 5 is a mixture of the sediment and the medicament, and the mud and water can be rapidly separated after the sediment and the medicament reach the sedimentation tank 5, thereby achieving better coagulation effect.
Alternatively, the mixing device 1 is one or at least two mixers, which may be unpowered mixers or dynamic mixers.
Optionally, the dynamic mixer includes a mixing chamber, a driving motor and a stirring device, the stirring device is disposed in the mixing chamber, the stirring device includes a stirring impeller (the stirring impeller may include a helical impeller) and a stirring shaft, the mixing chamber is shaped as a cylindrical barrel with two open ends, one open end of the mixing chamber is a feeding port 11, the other end of the mixing chamber is suitable for the stirring shaft to partially penetrate out, and the penetrating part of the stirring shaft is connected with the driving motor.
The power mixer comprises a speed reducer, wherein the stirring shaft penetrates through the speed reducer and is connected with the driving motor, a discharge hole and a dosing hole are formed in the side wall of the mixing chamber, and the discharge hole is located at one side of the speed reducer, which is close to the mixing chamber.
In one embodiment, the mixing device is a mixer, and the inlet of the mixer is the inlet of the mixing device, and the outlet of the mixer is the inlet of the mixing device.
In another embodiment, the mixing device 1 is at least two mixers connected in series by a connecting pipe, specifically, the discharge port of the previous mixer is connected with the feed port of the next mixer by a connecting pipe, wherein the front and back sequence of the mixers is consistent with the conveying direction of the bottom mud, and the bottom mud flows from the discharge port of the previous mixer to the feed port of the next mixer. In the plurality of mixers connected in series, the inlet of the first mixer closest to the front is the inlet 11 of the mixing device 1, and the outlet of the last mixer closest to the rear is the inlet 12 of the mixing device 1.
The conveying pipeline in the conveying system comprises a feeding pipe 2 and a discharging pipe 3, wherein the feeding pipe 2 is directly connected with the cutter suction boat or the slurry pump or is indirectly connected with the cutter suction boat or the slurry pump through a relay pump and the like, and bottom mud pumped out from the bottom of the river channel is conveyed to the mixing device 1, then discharged from the mixing device 1 and enters the sedimentation tank 5 through the discharging pipe 3.
Optionally, the dosing device 4 is connected to a dosing port 13 of the mixing device 1.
The dosing port 13 of the mixing device 1 may be disposed on a sidewall of the mixing device 1, and specifically may be disposed on a side close to the feeding port of the mixing device 1. The medicine adding opening of the mixing device 1 can be one or more, optionally, the mixing device 1 comprises one or at least two mixers, one medicine adding opening is arranged on each mixer, the medicine adding opening of each mixer is arranged on the side of the material inlet, and the side wall between the stirring impellers in the material inlet and the mixer can be arranged specifically, so that the sediment and the medicament can enter the stirring impellers together to be stirred and mixed, and the sufficient mixing of the sediment and the medicament is promoted. Medicine adding device 4 is connected with mixing arrangement 1's medicine adding mouth to mixing arrangement 1 is added with the medicament to medicine adding device 4, and then makes sediment and medicament at mixing arrangement 1 intensive mixing.
Optionally, the mixing device 1 includes at least two mixers, and the dosing devices 4 are equal in number to the mixers and connected in a one-to-one correspondence.
The dosing devices 4 are connected with the mixers in a one-to-one correspondence manner, and one dosing device 4 is connected to the dosing port of the mixer in one-to-one correspondence. So, different charge devices 4 can be used to add different medicaments, and its mixer that corresponds is used for mixing this kind of medicament and bed mud, and because of the mixer has the front and back order, so, different medicaments are added to the different charge devices 4 of accessible control, and then the order of addition of control medicament to obtain better medicament reaction effect.
Optionally, the delivery system includes a flow meter for detecting the flow rate of the sediment in the delivery system, and further determining the amount of the chemical added by the chemical adding device.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A bottom mud treatment method in dredging, dehydrating and drying engineering is characterized by comprising the following steps:
a. dredging the bottom sludge to a sedimentation basin, wherein during dredging of the bottom sludge to the sedimentation basin through a transport system, an agent is added to the transport system, wherein the bottom sludge and the agent are mixed in the transport system such that the bottom sludge is mud-water separated in the sedimentation basin;
b. discharging the supernatant obtained after mud-water separation in the sedimentation tank to the original river;
c. and dehydrating and drying the slurry precipitated in the precipitation tank.
2. The substrate sludge treatment method of claim 1, further comprising after step c:
d. and discharging tail water obtained by dehydrating and drying the slurry to the sedimentation tank.
3. The substrate sludge treatment method of claim 1, further comprising after step c:
e. and discharging the tail water obtained by dehydrating and drying the slurry to a tail water tank, and then discharging the tail water to the original river channel through the tail water tank, or directly discharging the tail water obtained by dehydrating and drying the slurry to the original river channel.
4. A substrate sludge treatment process according to any one of the claims 1 to 3 wherein the agent is used to enhance the substrate sludge ion concentration.
5. A method for treating bottom sludge according to any of the claims 1-3, wherein said agent is used for adsorbing particulate matter in the bottom sludge into agglomerates.
6. A substrate sludge treatment method according to any one of the claims 1 to 3, wherein the agent comprises a first agent for enhancing the substrate sludge ion concentration and a second agent for adsorbing particulate matter in the substrate sludge into agglomerates; the step of adding a pharmaceutical agent to the delivery system, where the sludge and pharmaceutical agent are mixed comprises:
after the first agent is added to the substrate sludge, the second agent is added to the substrate sludge.
7. A bottom sludge treatment system to which the bottom sludge treatment method according to any one of claims 1 to 6 is applied, comprising: a dosing device (4), a transmission system and a sedimentation tank (5); the dosing device (4) is communicated to the transmission system, and the transmission system is communicated to the sedimentation tank (5).
8. A bottom sludge treatment system according to claim 7, wherein the transfer system comprises a mixing device (1), a feeding pipe (2) and a discharging pipe (3), the feeding pipe (2) is connected with a feeding port (11) of the mixing device (1), one end of the discharging pipe (3) is connected with a discharging port (12) of the mixing device (1), and the other end of the discharging pipe (3) is connected with the sedimentation tank (5).
9. A substrate processing system according to claim 8, wherein the mixing device comprises at least two mixers, and the dosing devices (4) are in equal number and connected in a one-to-one correspondence with the mixers.
10. A substrate processing system according to claim 9, wherein the mixers (1) are connected in series to each other by means of a connecting pipe (6).
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| CN202010045336.5A CN111233291A (en) | 2020-01-16 | 2020-01-16 | Sediment treatment method and system in dredging, dehydrating and drying engineering |
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| CN202010045336.5A Pending CN111233291A (en) | 2020-01-16 | 2020-01-16 | Sediment treatment method and system in dredging, dehydrating and drying engineering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582503A (en) * | 2021-07-28 | 2021-11-02 | 长三角(义乌)生态环境研究中心 | Sediment precipitation and concentration device, sediment treatment system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010003390A (en) * | 1999-06-23 | 2001-01-15 | 장영호 | Apparatus for removing sludge in rever, and method for processing thereof |
| CN109422441A (en) * | 2017-08-31 | 2019-03-05 | 宁波弘海众创空间服务有限公司 | A kind of dredged sediment dehydration and drying integral treatment method |
-
2020
- 2020-01-16 CN CN202010045336.5A patent/CN111233291A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010003390A (en) * | 1999-06-23 | 2001-01-15 | 장영호 | Apparatus for removing sludge in rever, and method for processing thereof |
| CN109422441A (en) * | 2017-08-31 | 2019-03-05 | 宁波弘海众创空间服务有限公司 | A kind of dredged sediment dehydration and drying integral treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 吴桐: "《中国城市垃圾、污水处理技术实务》", 31 July 2001, 世界知识出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582503A (en) * | 2021-07-28 | 2021-11-02 | 长三角(义乌)生态环境研究中心 | Sediment precipitation and concentration device, sediment treatment system and method |
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