CN112723608A - Drop-induced crystallization precipitation system - Google Patents

Drop-induced crystallization precipitation system Download PDF

Info

Publication number
CN112723608A
CN112723608A CN202110067838.2A CN202110067838A CN112723608A CN 112723608 A CN112723608 A CN 112723608A CN 202110067838 A CN202110067838 A CN 202110067838A CN 112723608 A CN112723608 A CN 112723608A
Authority
CN
China
Prior art keywords
water
induced crystallization
head loss
drop
crystal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110067838.2A
Other languages
Chinese (zh)
Inventor
潘章斌
孙韶华
贾瑞宝
李桂芳
朱小康
宋武昌
李梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG PROVINCE CITY WATER SUPPLY AND DRAINAGE WATER QUALITY MONITORING CENTER
Original Assignee
SHANDONG PROVINCE CITY WATER SUPPLY AND DRAINAGE WATER QUALITY MONITORING CENTER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG PROVINCE CITY WATER SUPPLY AND DRAINAGE WATER QUALITY MONITORING CENTER filed Critical SHANDONG PROVINCE CITY WATER SUPPLY AND DRAINAGE WATER QUALITY MONITORING CENTER
Priority to CN202110067838.2A priority Critical patent/CN112723608A/en
Publication of CN112723608A publication Critical patent/CN112723608A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218—Crystallization
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention discloses a drop-induced crystallization and precipitation system, which comprises a drop aeration device and an induced crystallization and precipitation tank, wherein the drop aeration device comprises a water tank, the induced crystallization and precipitation tank comprises a crystal inducing unit, the crystal inducing unit comprises a crystal inducing separation area and a crystal inducing contact precipitation area, the crystal inducing contact precipitation area is communicated with the crystal inducing separation area, the lower part of the crystal inducing contact precipitation area is filled with a quartz sand layer crystal nucleus, the water tank is connected with the bottom of the crystal inducing contact precipitation area, a sand and stone expansion control port is arranged at the position close to the connection position of the crystal inducing contact precipitation area and the crystal inducing separation area, a water outlet pipe is arranged at the upper part of the crystal inducing separation area, the lower part of the crystal inducing contact precipitation area is connected with a chemical feeding pipe, and a sand discharge port is arranged on the; drop aeration equipment includes a plurality of ponds, and a plurality of ponds highly reduce the setting in proper order, and rivers get into from the first pond of highest position, overflow and go out to the pond of following low position in proper order, and the last pond of lowest position passes through the inlet tube and lures brilliant contact settling zone to be connected.

Description

Drop-induced crystallization precipitation system
Technical Field
The invention relates to the technical field of water treatment, in particular to a water drop-induced crystallization precipitation system for removing bicarbonate radical, iron, manganese, calcium, magnesium and other ions in water.
Background
Water is a source of life and also an important material basis for human survival and socioeconomic development. Hardness is an important water quality index, and is usually Ca in water2+、Mg2+Content characterization, Ca can be mixed with water2+、Mg2+The bound anion being predominantly HCO3 -And the like. Hardness is divided into carbonate hardness and non-carbonate hardness, the sum of which is the total hardness. The water for life and production has certain requirements on hardness indexes. In actual life, drinking hard water causes discomfort of intestines and stomach, diarrhea, abdominal distension and the like, and causes pathological changes of cardiovascular system, nervous system and urinary system, even carcinogenesis and teratogenesis. The industrial water has too high hardness, so that the quality of industrial products is reduced if the hardness of the industrial water is too high, and working condition accidents such as normal production and even explosion are influenced by blocking of equipment such as pipelines and heat exchangers due to scale formation if the hardness of the industrial water is too high, so that the removal of the hardness of the industrial water has important significance. Hardness removal in water is also known as softening of water. Currently, ion exchange methods, electrodialysis methods, membrane softening methods, and chemical agent softening methods are commonly used for removing hardness from water. Among them, the ion exchange method, the electrodialysis method and the membrane softening method have the disadvantages of high cost, high operation cost, high requirement on the quality of raw water and the like. The most used chemical softening method is lime softening. Lime softening method mostly adopts the process of lime softening and coagulant addition, but the process has the problems of complex flow, higher cost, complex operation and management, great influence of the quality of inlet water, easy occurrence of unstable outlet water and the like.
In addition, the water contains more iron and manganese which can cause harm. If the concentration of iron and manganese exceeds a certain limit, reddish brown precipitates can be generated, yellow spots can be left on white fabrics, water vessels and sanitary wares in life, and iron-extracting bacteria can be easily propagated to block pipelines; in industry, when the fabric is used in textile, printing and dyeing, knitting, papermaking and other industries, the fabric can be more shadowThe quality of the product is affected. Excessive intake of manganese can affect the central nerve of a human body, and can cause conditions such as inappetence, vomiting, diarrhea and the like, and serious manganese poisoning, wherein early symptoms of fatigue, hypodynamia, dizziness, headache, hypomnesis, muscle pain, emotional instability, depression or excitement can be caused. Studies by american, finnish scientists have demonstrated that iron overload in humans has an effect on the heart and is even more dangerous than cholesterol. Therefore, the high-iron and high-manganese water must be purified to be drunk. Ferrous iron has strong reducibility, and is easily oxidized into ferric iron by oxidants (such as oxygen, chlorine, potassium permanganate and the like). Fe3+Easily hydrolyzed in water to form a hardly soluble compound Fe (OH)3Precipitating and separating out, thereby achieving the aim of removing iron. Manganese ions can be oxidized to MnO2Precipitating out. The traditional aeration mode mainly comprises blast aeration and mechanical aeration, and the two aeration modes have the defects of high noise, high energy consumption, high equipment cost and the like during continuous operation, so that the application of the two aeration modes is greatly limited.
In order to solve the problems, the water drop-induced crystallization precipitation process and system are developed and used for removing bicarbonate radical, iron, manganese, calcium, magnesium and other ions in water.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a drop-induced crystallization and precipitation system. The water drop aeration device comprises a plurality of water pools, the heights of the water pools are sequentially reduced, and water flow enters from the first water pool at the highest position.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a water drop-induced crystallization and sedimentation system comprises a water drop aeration device and an induced crystallization and sedimentation tank, wherein the water drop aeration device comprises a water pool, the induced crystallization and sedimentation tank comprises a plurality of induced crystal units, each induced crystal unit comprises an induced crystal separation area at the upper part and an induced crystal contact sedimentation area at the lower part, the upper part of each induced crystal contact sedimentation area is communicated with the lower part of each induced crystal separation area, the lower part of each induced crystal contact sedimentation area is filled with a quartz sand layer crystal nucleus, the water pool is connected with a water inlet at the bottom of each induced crystal contact sedimentation area through a water inlet pipe, a sand stone expansion control port is arranged at the position close to the connection position of each induced crystal contact sedimentation area and the corresponding induced crystal separation area, a water outlet pipe is arranged at the upper part of each induced crystal separation area, the water outlet pipe is provided with an open-close water outlet valve, a medicine feeding pipe is connected onto the side wall of the lower part of, controlling the discharge of the crystallized product through a valve;
drop aeration equipment includes a plurality of ponds, and a plurality of ponds highly reduce the setting in proper order, and rivers get into from the first pond of highest position, overflow and go out to the pond of following low position in proper order, and the last pond of lowest position passes through the inlet tube and lures brilliant contact settling zone to be connected.
The crystal inducing contact precipitation zone adopts a cone cavity structure with a large opening upwards, the chemical feeding pipe is connected with the cone cavity structure, the lower part of the cone cavity structure is connected with the cylinder cavity mechanism, and the water inlet pipe is connected with the bottom water inlet of the cylinder cavity mechanism.
The height difference between every two adjacent water pools is 0.3-0.6 m.
The induced crystallization sedimentation tank adopts the liquid level pressure difference between the aeration device and the induced crystallization separation zone to maintain operation, and the water level height difference h required by the start of the induced crystallization sedimentation tank is calculated according to the induced crystallization sedimentation tank1And the water level difference h required by operation2。
The height difference of the water surface required by the start of the induced crystallization sedimentation tank is h1When the crystal inducing softening tank runs, the volume of the particles in the tank is gradually increased and expanded, and when the filter material layer reaches the sand expansion control in the graphSlag is discharged during the opening process, h1The maximum water surface height difference is larger than the maximum water surface height difference required by starting the crystal inducing sedimentation tank in the process from the beginning to slag discharging; h is1Obtained by the following formula:
ρwater (W)g(h1+h3+h4)VBottom＝(ρSandgh3+ρWater (W)gh4)VBottomTo obtain:
Figure BDA0002904823430000031
in the formula, ρSandThe stacking density of the filter material layer particles is shown;
h1the water level difference required for starting the induced crystallization sedimentation tank;
h3the height of the sand and stone during the sand discharge.
The inlet tube adopts the bellmouth that outside opening is big, takes the pipeline of two 90 degrees elbows for getting into the end, the induced crystallization sedimentation tank maintains the required water level difference of operation and is h2Obtained by the following formula: h is2(total filter layer head loss + on-way head loss + local head loss) k,
namely, it is obtained by the following formula:
Figure BDA0002904823430000041
in the formula: h isjFor head loss of the entire filtering layer, hfIn order to achieve the on-the-way head loss,
Figure BDA0002904823430000042
in order to enter the end head loss,
Figure BDA0002904823430000043
is the local head loss of two 90-degree elbows of the water inlet pipe,
Figure BDA0002904823430000044
and k is a correction coefficient and is 1, wherein k is the local head loss at the joint of the water inlet pipe and the water inlet.2～1.5；
Wherein, 1) the head loss of the whole filtering layer is hjThe formula is as follows:
Figure BDA0002904823430000045
wherein the dynamic viscosity coefficient of mu-water, the surface shape coefficient of Pa s, alpha-cleaning filter layer, the epsilon-porosity, de-an equivalent diameter;
2) considering the water flow in the water pipe as laminar flow and the head loss h along the wayjCalculated by the Darcy-Weisbach formula:
Figure BDA0002904823430000046
in the formula (I), the compound is shown in the specification,
Figure BDA0002904823430000047
v-flow velocity of water flow in the pipeline, rho-density of water, mu-viscosity coefficient of water, and d-diameter of the pipeline;
3) local head loss
According to a local head loss formula listed in a water supply and drainage design manual, calculating the head lost in the water flow process, wherein the inlet end of a water inlet pipe is an inlet with a bell mouth and extending into a water pool, and the head loss is as follows:
Figure BDA0002904823430000048
the epsilon is 0.3 of the total number,
Figure BDA0002904823430000049
wherein Q is the flow rate of water flow and d is the inner diameter of the water pipe;
the local head loss of two 90-degree elbows of the inlet tube is:
Figure BDA0002904823430000051
taking 1.1 as epsilon;
the local head loss at the junction of the water inlet pipe and the water inlet is as follows:
Figure BDA0002904823430000052
ε is taken as 1, v is the flow rate of water in the water pipe.
The invention has the beneficial effects that:
1. the water drop aeration device comprises a plurality of water pools, the heights of the water pools are sequentially reduced, and water flow enters from the first water pool at the highest position.
2. The power of the filtration is derived from the water surface difference, and after the filtration is started, the operation of the induced crystallization sedimentation tank can be maintained through the water pressure caused by the water surface difference between the outside and the induced crystallization sedimentation tank; the water outlet valve of the water outlet pipe on the right side of the tank wall is kept in an open state before the induced crystallization sedimentation tank is started, the water outlet valve of the water outlet pipe is closed after the induced crystallization sedimentation tank is started, the liquid level rises, and the liquid level is maintained at the height required by the process due to the action of the overflow weir on the upper part of the induced crystallization separation zone, so that the hardness of water is removed, and the softening of the water is realized to meet the specified requirements.
3. The invention overcomes the defects of high noise, high energy consumption and high equipment cost in continuous operation in the prior art by adopting blast aeration and mechanical aeration modes, and greatly expands the application range of the invention. Meanwhile, the invention also solves the problems of complex process flow, higher cost, complex operation management, great influence of the quality of inlet water and easy occurrence of unstable outlet water in the prior art by adopting a lime softening method.
4. Calculating the water surface height difference h required by starting the induced crystallization sedimentation tank according to the induced crystallization sedimentation tank1And the water level difference h required by operation2Under the condition that the water pressure of the filtering power is ensured to maintain the operation of the induced crystallization sedimentation tank and meet the technological requirements, the equipment height of the whole system can be reduced, the equipment manufacturing cost and the occupied space are reduced, the equipment is convenient to maintain, and the use and maintenance cost is reduced.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure, 1 is a drop aeration device, 2 is a water outlet, 3 is a crystal inducing separation area, 4 is a sand and stone expansion control port, 5 is a chemical feeding pipe, 6 is a crystal inducing contact settling area, 7 is a sand discharging port, and 8 is a water inlet pipe.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments.
As shown in figure 1, a water drop-induced crystallization and precipitation system comprises a water drop aeration device 1 and an induced crystallization and precipitation tank, wherein the water drop aeration device 1 comprises a water tank, the induced crystallization and precipitation tank comprises a plurality of crystal inducing units, each crystal inducing unit comprises a crystal inducing separation area 3 at the upper part and a crystal inducing contact and precipitation area 6 at the lower part, the upper part of the crystal inducing contact and precipitation area 6 is communicated with the lower part of the crystal inducing separation area 3, quartz sand layer crystal nuclei are filled at the lower part of the crystal inducing contact and precipitation area 6, the water tank is connected with a water inlet at the bottom of the crystal inducing contact and precipitation area 6 through a water inlet pipe 8, a sand and stone expansion control port 4 is arranged at the connecting position of the crystal inducing contact and precipitation area 6 and the crystal inducing separation area 3, a water outlet pipe 2 is arranged at the upper part of the crystal inducing separation area 3, the water outlet pipe 2 is provided with an open-close water outlet valve, a medicine adding pipe 5 is connected to the side, the pipeline of the sand outlet 7 is connected with a valve, and the discharge of the crystallized product is controlled by the valve.
Drop aeration equipment 1 includes a plurality of ponds, and a plurality of ponds highly reduce the setting in proper order, and rivers get into from the first pond of highest position, overflow and go out to the pond of following low position in proper order, and the last pond of lowest position passes through inlet tube 8 and lures brilliant contact settling zone 6 to be connected.
The crystal inducing contact settling zone 6 adopts a cone cavity structure with a large opening upwards, the chemical feeding pipe 5 is connected with the cone cavity structure, the lower part of the cone cavity structure is connected with the cylinder cavity mechanism, and the water inlet pipe is connected with the water inlet at the bottom of the cylinder cavity mechanism.
The height difference between every two adjacent water pools is 0.3-0.6 m.
The water drop aeration device of the sedimentation tank provided by the embodiment of the invention can be composed of 4-7 water tanks with sequentially reduced heights, the height drop between every two water tanks is 0.3-0.6 m, water flow enters from the first water tank and sequentially overflows backwards to perform continuous aeration, the contact area of the water flow and air is increased in the falling process of the water flow, the internal disturbance of the water flow is caused, the dissolution amount of oxygen in water is increased, the oxidation reaction of iron and manganese ions is enhanced, and the iron and manganese ions are precipitated or adsorbed and removed in a subsequent induced crystallization sedimentation tank. In addition, the violent disturbance generated by the water drop aeration can also increase the dissolved amount of carbon dioxide in water, enhance the reaction of the carbon dioxide and the water, increase the concentration of carbonate radical and bicarbonate radical in the water, the bicarbonate radical can react with sodium hydroxide added from a dosing pipe and is converted into carbonate radical, and the carbonate radical and calcium and magnesium ions generate precipitates which are attached to a filter material of an induced crystallization sedimentation tank, so that the calcium and magnesium ions are removed. The last water tank at the lowest position is communicated with the induced crystallization sedimentation tank through a water pipe with a bell mouth, and the bell mouth is always positioned below the water surface. The aeration mode of the invention which enables the water flow to generate disturbance through overflowing one by one water tank solves the defects and problems of high noise, high energy consumption, high equipment cost and the like in the continuous operation of the traditional blast aeration and mechanical aeration in the prior art.
When the device works, raw water enters from the bottom of the crystal inducing unit through the water inlet pipe, supernatant liquid flows out through the water outlet pipe after full reaction, and sediment is discharged through the sand discharge pipe. The filtering power is derived from the water surface difference, and after the water surface difference is started, the operation of the induced crystallization sedimentation tank can be maintained through the water pressure caused by the water surface difference between the outside and the induced crystallization sedimentation tank. And (3) the water outlet valve of the water outlet pipe on the right side of the tank wall before the start of the induced crystallization sedimentation tank is kept in an open state, the water outlet valve of the water outlet pipe is closed after the start, the liquid level rises, and the liquid level is maintained at the required process height in the next figure under the action of the overflow weir.
The induced crystallization sedimentation tank of the invention adopts the liquid level pressure difference between the aeration device and the crystal inducing separation zone to maintain the operation, and calculates the water level height difference h required by the start of the induced crystallization sedimentation tank aiming at the induced crystallization sedimentation tank1And the water level difference h required by operation2。
Firstly, the height difference of the water surface required by the start of the induced crystallization sedimentation tank is h1When the filtering material layer reaches the sand expansion control port 4 in the picture, the slag is discharged, and h is the time when the filtering material layer reaches the sand expansion control port 4 in the picture1Is larger than the maximum water level difference required by starting the crystal inducing sedimentation tank in the process from the beginning to the slag discharge.
The sand and stone particles filled in the filter material, namely the crystal inducing contact settling zone are equivalent to liquid with the same density, and the pressure generated by the liquid is rhoSandgh，ρSandThe porosity among the particles is increased in the process of increasing the volume of the filter material layer for the stacking density of the particles of the filter material layer, and rhoSandThe particle size is reduced, so that the stacking density of the particles is the maximum density when the filter material is cleaned, the h is the maximum height when the slag is discharged, and the generated pressure is rhoSandIn gh ρSandAnd h is maximum when taking the two values, namely rhoSandgh3Due to h1The height difference of the water surface is larger than the maximum height difference of the water surface required by starting the crystal inducing sedimentation tank in the process from the beginning to slag discharge, and h is calculated1Pressure produced by the time filter material layer is rhoSandgh3Recording, and carrying out pressure analysis on the bottom surface of the filter material layer:
ρwater (W)g(h1+h3+h4)VBottom＝(ρSandgh3+ρWater (W)gh4)VBottom
Figure BDA0002904823430000081
ρSandThe stacking density of the filter material layer particles is shown;
h1the water level difference required for starting the induced crystallization sedimentation tank;
h3the height of the sand and stone during the sand discharge.
The water inlet pipe adopts a horn mouth with a large external opening and a pipeline with two 90-degree elbows for the inlet end, and the height difference of the water level required by the operation of the induced crystallization sedimentation tank is h2Obtained by the following formula: h is2(total filter layer head loss + on-way head loss + local head loss) k,
namely, it is obtained by the following formula:
Figure BDA0002904823430000091
in the formula: h isjFor head loss of the entire filtering layer, hfIn order to achieve the on-the-way head loss,
Figure BDA0002904823430000092
in order to enter the end head loss,
Figure BDA0002904823430000093
is the local head loss of two 90-degree elbows of the water inlet pipe,
Figure BDA0002904823430000094
taking 1.2-1.5 as a correction coefficient for the local head loss at the joint of the water inlet pipe and the water inlet and k as a correction coefficient;
wherein, 1) the head loss of the whole filtering layer is hj：
Figure BDA0002904823430000095
In the formula, mu is the dynamic viscosity coefficient of water, Pa.s;
alpha is the surface shape coefficient of the cleaning filter layer;
ε -porosity;
de-equivalent diameter.
2) Loss of on-way head hjCalculated by the Darcy-Weisbach formula,
Figure BDA0002904823430000096
considering the flow of water in the water tubes as laminar flow,
Figure BDA0002904823430000097
v-the flow rate of water in the pipe;
ρ -density of water;
μ — viscosity coefficient of water;
d-pipe diameter.
2. Local head loss
According to a local head loss formula listed in a water supply and drainage design manual, a lost head in a water flow process can be calculated, an inlet end of a red water pipe is an inlet with a bell mouth and extending into a water pool, and the head loss is as follows:
Figure BDA0002904823430000098
the epsilon is 0.3 of the total number,
Figure BDA0002904823430000101
in the formula, Q is the flow rate of water flow,
d is the inner diameter of the water pipe.
The local head loss of two 90-degree elbows of the red water pipe is as follows:
Figure BDA0002904823430000102
ε was 1.1.
The local head loss at the joint of the red water pipe and the filter material layer is as follows:
Figure BDA0002904823430000103
ε is taken as 1, v is the flow rate of water in the water pipe.
In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for the purpose of describing the present invention but do not require that the present invention must be constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be interpreted broadly, and may be connected or disconnected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.
The above description is of the preferred embodiment of the present invention, and the description of the specific embodiment is only for better understanding of the idea of the present invention. It will be appreciated by those skilled in the art that various modifications and equivalents may be made in accordance with the principles of the invention and are considered to be within the scope of the invention.

Claims (6)

1. The utility model provides a drop-induced crystallization sedimentation system, includes drop aeration equipment, induced crystallization sedimentation tank, characterized by, drop aeration equipment includes the pond, and induced crystallization sedimentation tank includes that a plurality of lures brilliant unit, lure brilliant contact sedimentation zone including the luring brilliant disengagement zone of upper portion, lower part in the brilliant unit of luring, lures brilliant contact sedimentation zone upper portion and lures brilliant disengagement zone lower part intercommunication, lure brilliant contact sedimentation zone lower part to fill quartz sand layer crystal nucleus, the pond is connected with luring brilliant contact sedimentation zone bottom water inlet through the inlet tube, is equipped with grit expansion control mouth near luring brilliant contact sedimentation zone and luring brilliant disengagement zone hookup location, is equipped with the outlet pipe on luring brilliant disengagement zone upper portion, and the outlet pipe is equipped with the outlet valve, connects the dosing pipe on the lateral wall of the lower part of luring brilliant contact sedimentation zone, is equipped with the sand discharge mouth on the lateral wall near luring brilliant, the sand discharge port pipeline is connected with a valve, and the discharge of the crystallized product is controlled through the valve;
drop aeration equipment includes a plurality of ponds, and a plurality of ponds highly reduce the setting in proper order, and rivers get into from the first pond of highest position, overflow and go out to the pond of following low position in proper order, and the last pond of lowest position passes through the inlet tube and lures brilliant contact settling zone to be connected.
2. The drop-induced crystallization and precipitation system as claimed in claim 1, wherein the crystal inducing contact precipitation zone is in a cone cavity structure with a large opening facing upwards, the chemical feeding pipe is connected with the cone cavity structure, the lower part of the cone cavity structure is connected with the cylinder cavity mechanism, and the water inlet pipe is connected with the water inlet at the bottom of the cylinder cavity mechanism.
3. The drop-induced crystallization precipitation system of claim 1, wherein the height drop between each two adjacent water ponds is 0.3 to 0.6 m.
4. The drop-induced crystallization and sedimentation system according to claim 1, wherein the induced crystallization and sedimentation tank is maintained to operate by using a liquid level pressure difference between the aeration device and the crystal inducing and sedimentation zone, and the water level difference h required for starting the induced crystallization and sedimentation tank is calculated according to the induced crystallization and sedimentation tank1And the water level difference h required by operation2。
5. The drop-induced crystallization precipitation system according to claim 4, wherein the difference in water level required for starting the crystallization-inducing precipitation tank is h1Along with the operation of the crystal inducing softening tank, the volume of the particles in the tank is gradually increased and expanded,when the filter material layer reaches the sand expansion control port in the drawing, the slag is discharged, h1The maximum water surface height difference is larger than the maximum water surface height difference required by starting the crystal inducing sedimentation tank in the process from the beginning to slag discharging; h is1Obtained by the following formula:
ρwater (W)g(h1+h3+h4)VBottom＝(ρSandgh3+ρWater (W)gh4)VBottomTo obtain:
Figure FDA0002904823420000021
in the formula, ρSandThe stacking density of the filter material layer particles is shown;
h1the water level difference required for starting the induced crystallization sedimentation tank;
h3the height of the sand and stone during the sand discharge.
6. The drop-induced crystallization precipitation system of claim 5, wherein the water inlet pipe is a pipe with two 90-degree elbows and a flared opening with a large external opening at the inlet end, and the water level difference required by the operation of the induced crystallization precipitation tank is h2Obtained by the following formula: h is2(total filter layer head loss + on-way head loss + local head loss) k,
namely, it is obtained by the following formula:
Figure FDA0002904823420000022
in the formula: h isjFor head loss of the entire filtering layer, hfIn order to achieve the on-the-way head loss,
Figure FDA0002904823420000023
in order to enter the end head loss,
Figure FDA0002904823420000024
is the local head loss of two 90-degree elbows of the water inlet pipe,
Figure FDA0002904823420000025
taking 1.2-1.5 as a correction coefficient for the local head loss at the joint of the water inlet pipe and the water inlet and k as a correction coefficient;
wherein, 1) the head loss of the whole filtering layer is hjThe formula is as follows:
Figure FDA0002904823420000026
wherein the dynamic viscosity coefficient of mu-water, the surface shape coefficient of Pa s, alpha-cleaning filter layer, the epsilon-porosity, de-an equivalent diameter;
2) considering the water flow in the water pipe as laminar flow and the head loss h along the wayjCalculated by the Darcy-Weisbach formula:
Figure FDA0002904823420000027
in the formula (I), the compound is shown in the specification,
Figure FDA0002904823420000028
v-flow velocity of water flow in the pipeline, rho-density of water, mu-viscosity coefficient of water, and d-diameter of the pipeline;
3) local head loss
According to a local head loss formula listed in a water supply and drainage design manual, calculating the head lost in the water flow process, wherein the inlet end of a water inlet pipe is an inlet with a bell mouth and extending into a water pool, and the head loss is as follows:
Figure FDA0002904823420000031
the epsilon is 0.3 of the total number,
Figure FDA0002904823420000032
in the formula, Q is the flow rate of water flow, and d is the inner diameter of a water pipe;
the local head loss of two 90-degree elbows of the inlet tube is:
Figure FDA0002904823420000033
taking 1.1 as epsilon;
the local head loss at the junction of the water inlet pipe and the water inlet is as follows:
Figure FDA0002904823420000034
ε is taken as 1, v is the flow rate of water in the water pipe.
CN202110067838.2A 2021-01-19 2021-01-19 Drop-induced crystallization precipitation system Pending CN112723608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110067838.2A CN112723608A (en) 2021-01-19 2021-01-19 Drop-induced crystallization precipitation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110067838.2A CN112723608A (en) 2021-01-19 2021-01-19 Drop-induced crystallization precipitation system

Publications (1)

Publication Number Publication Date
CN112723608A true CN112723608A (en) 2021-04-30

Family

ID=75592264

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110067838.2A Pending CN112723608A (en) 2021-01-19 2021-01-19 Drop-induced crystallization precipitation system

Country Status (1)

Country Link
CN (1) CN112723608A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09276883A (en) * 1996-04-11 1997-10-28 Hitachi Chem Co Ltd Purifying tank
CN107032470A (en) * 2017-06-13 2017-08-11 重庆市铜梁区宝山源矿泉水厂 A kind of drinking water ferrimanganic removes system
CN108609750A (en) * 2018-07-05 2018-10-02 山东省城市供排水水质监测中心 Novel remove of one kind luring brilliant sedimentation basin and technique firmly
CN112142235A (en) * 2020-10-23 2020-12-29 扬州大学 Coagulating sedimentation water treatment device and method for driving over-saturated gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09276883A (en) * 1996-04-11 1997-10-28 Hitachi Chem Co Ltd Purifying tank
CN107032470A (en) * 2017-06-13 2017-08-11 重庆市铜梁区宝山源矿泉水厂 A kind of drinking water ferrimanganic removes system
CN108609750A (en) * 2018-07-05 2018-10-02 山东省城市供排水水质监测中心 Novel remove of one kind luring brilliant sedimentation basin and technique firmly
CN112142235A (en) * 2020-10-23 2020-12-29 扬州大学 Coagulating sedimentation water treatment device and method for driving over-saturated gas

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
朱月海等: "《工业给水处理》", 30 September 2016, 同济大学出版社 *
程银才等: "《水力学》", 31 January 2019, 华中科技大学出版社 *

Similar Documents

Publication Publication Date Title
US4724085A (en) Method for the clarification of sewage and other wastes
CN108128961A (en) Brine waste zero emission method and system
CN107047444A (en) A kind of oxygen-enriching method
CN106630074A (en) Flocculation, magnetic adsorption and filtration all-in-one machine
CN112723608A (en) Drop-induced crystallization precipitation system
CN204767720U (en) Automatic dry sediment device of backwash surface filter
CN110240332B (en) Crystallization filtering type underground water softening and scale reducing treatment device
CN206008114U (en) A kind of improved rectangular sedimentation tank
CN202214263U (en) Drinking water treatment equipment used for stabilizing water quality
CN208345997U (en) A kind of advanced oxidation water treatment system based on light electrolysis
CN106186451A (en) A kind of processing system containing heavy metal metallurgy waste water
JPH0734911B2 (en) Water filtering device and method for removing impurities
JP3659383B2 (en) Method and apparatus for treating manganese-containing water
CN109678282A (en) A kind of groundwater treatment technique and device for not only going hardness but also drop basicity
CN212076664U (en) Mine underground water iron and manganese removing system
CN206843279U (en) Pasture Waste Water Treatment
CN205740581U (en) A kind of processing means of chlor-alkali industry mercury-containing waste water
CN112142235B (en) Coagulating sedimentation water treatment device and method for driving over-saturated gas
CN212315567U (en) Incinerator ash treatment system
CN208413999U (en) A kind of device suitable for high rigidity wastewater hardness removing
JP5351406B2 (en) Aggregation filtration treatment method and aggregation filtration treatment apparatus
CN206814518U (en) Concurrent swash plate Airfloat filtering pond
CN112897712B (en) Crystal-inducing elastic filler, fixed bed softening reactor and using method
CN209338257U (en) The processing unit of hardness in multistep combined removal water
CN112897737B (en) Drop induced crystallization softening combination matching system and use method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210430

RJ01 Rejection of invention patent application after publication