CN107986511A - Water process air supporting and sedimentation solid-liquid separation device and processing method - Google Patents

Abstract

The invention discloses an air flotation and precipitation solid-liquid separation device for water treatment. The separation zone and the sedimentation outlet zone are connected through the perforated flower wall of the sedimentation outlet zone. A sludge collection zone is set at the lower part of the separation zone. The flocculation zone is composed of four reaction sections and a transition section, and the reaction section is directly separated by a wall , the reaction section is composed of a shaft, and a small-hole grid grid is arranged in the shaft. The invention also discloses a water treatment air flotation and precipitation solid-liquid separation method. Through the above optimized structure, the present invention ensures that both the air flotation process and the sedimentation process can achieve a good treatment effect, and the water quality of the effluent reaches the best.

Description

Air flotation and sedimentation solid-liquid separation device and treatment method for water treatment

technical field

The invention relates to the technical field of water treatment, in particular to an air flotation and sedimentation solid-liquid separation device for water treatment and a treatment method.

Background technique

The publication number is CN1600695A (patent number 200410043895.3), and the invention patent titled "Air Flotation and Precipitation Solid-Liquid Separation Device" discloses a water purification device that can switch between two water treatment processes, air flotation and sedimentation. A water hole is opened at the middle and lower part of the baffle plate in the contact area, a connecting valve is arranged on the baffle plate of the contact area of the water hole, and a perforated water collection pipe is provided at the lower part of the shell at the separation area, and the outer end of the perforated water collection pipe Pass through the casing and be fixedly connected to one end of the air flotation water outlet valve, the other end of the air flotation water outlet valve is connected to an air flotation water outlet pipe, and a through hole is opened on the upper part of the perforated flower wall; a water hole is opened on the baffle plate of the contact area and A connecting valve is set, a perforated water collection pipe is set in the separation area, and the through hole of the perforated flower wall is opened on the upper part of the perforated flower wall, which takes into account the requirements of both air flotation and sedimentation. It has the advantages of reasonable structure, convenient operation, and the best water purification effect. The above technical solution only discloses the structural features of the air flotation and sedimentation solid-liquid separation device, without specifying the operation steps and methods for treating raw water.

The patent application number is 200910039626.2, and the patent name is "A Method for Removing Algae by Air Floatation and Precipitation Solid-liquid Separation", which discloses a method of air flotation and precipitation solid-liquid separation suitable for purifying raw water of rivers, rivers, lakes and reservoirs. The method for algae, the specific steps are as follows: the specific steps are as follows: (1) detect the raw water of rivers, lakes, and reservoirs; (2) add flocculants or flocculants and coagulants to the raw water according to the above detection results , and make it fully mixed and reacted; (3) introduce the raw water after fully mixed and reacted in step (2) into the air flotation and sedimentation solid-liquid separation device; (4) determine the operation of air flotation or sedimentation according to the water quality of the raw water. It has the technology of treating algae in raw water with high efficiency, wide application range and strong adaptability; at the same time, the removal rate of algae is increased to more than 90%. Although the above technical solution discloses the raw water quality conditions for removing algae and switching the operation of the air flotation process or the sedimentation process, it also discloses the dosage ratio, inclined plate spacing, dissolved air pressure, reflux ratio, and algae removal rate. However, the operation steps and methods for treating the raw water and removing impurities in the raw water during the overall process operation are not given; the dosing control and adjustment methods of the process operation chemicals are not given; the influence of key factors on the solid-liquid separation effect is not specified; there is no The specific indicators of raw water quality testing are given; the relationship between the addition and adjustment of flocculant or coagulant aids and water quality indicators is not given; the cycle of mud scraping and slag removal is not given; air flotation return water is not given The source requirements and the requirements for the installation location of the pressure dissolved gas tank.

Therefore, it is necessary to improve the above technical solution to improve the actual processing effect. Therefore, the (inventor) wants to further disclose the operation and steps of the air flotation and precipitation solid-liquid separation method for water treatment, and disclose the above technical conditions and parameters.

Contents of the invention

In view of the deficiencies in the prior art described above, the purpose of the present invention is to provide an air flotation and sedimentation solid-liquid separation device for water treatment that can effectively guarantee the water quality of the effluent, optimize the structural design of the existing equipment, and make the air flotation and sedimentation solid-liquid separation device effective. The operation effect of the sedimentation process is optimal, and the quality of the effluent water is guaranteed.

Another object of the present invention is to provide a treatment method for air flotation and sedimentation solid-liquid separation for water treatment.

In order to achieve the above object, the technical solution adopted by the present invention to solve its technical problems is: an air flotation and sedimentation solid-liquid separation device for water treatment, including a flocculation area, a contact area, a separation area, a mud collection area and a sedimentation water outlet area. A contact zone is set between the separation zone and the separation zone. The separation zone and the sedimentation effluent zone are connected by a perforated flower wall in the sedimentation effluent zone. A sludge collection zone is set at the lower part of the separation zone. The flocculation zone is composed of four reaction sections and a transition section Composition, the reaction section is directly separated by the wall, and the reaction section is composed of a shaft, and a small-hole grid grid is arranged in the shaft.

The mesh size of the small-hole grid plate is 20-50mm×20-50mm, and the thickness of the small-hole grid plate is 16-10mm.

The small-hole grid plate is on the reaction section from the water inlet end to the water outlet end, and the reaction section is divided into 4 layers, 3 layers, 2 layers, and 1 layer, and the small-hole grid plate is arranged in the middle. The horizontal distance between layers is 0.6m~1.0m.

The transition section of the flocculation zone and the contact zone are connected by a perforated flower wall in the contact zone.

A contact zone baffle is set between the contact zone and the separation zone, and the height of the contact zone baffle is the same as that of the bottom of the inclined plate assembly.

The separation area is connected with the sedimentation water outlet area, the sedimentation water outlet area is wedge-shaped, and the bottom of the sedimentation water outlet area is slope-shaped. Slippery mud holes are set on the partition wall between the sedimentation effluent area and the separation area.

A scum flushing water pipe is arranged on the water surface at the top of the separation zone.

The mud collecting area has a flat bottom structure, a mud scraper is arranged on it, and a mud collecting pit is arranged at the end of the mud collecting area.

The air flotation outlet area is provided with an air flotation outlet channel and an air flotation water collection pipe, and the air flotation water collection pipe is arranged under the inclined plate group and connected with the air flotation outlet channel.

The air flotation outlet channel is located outside the sedimentation outlet channel, and the air flotation water collection pipe passes through the end pool wall of the separation zone along the bottom of the inclined plate assembly and is connected to the air flotation outlet channel.

The separation area is provided with a slanting plate assembly, and the slanting plate assembly is connected and fixed together by supporting rods, wherein the installation angle of the sloping plates is 45-65 degrees, and the distance between the sloping plates is 25-45mm.

The air flotation and precipitation solid-liquid separation method for water treatment is based on the above-mentioned air flotation and precipitation solid-liquid separation device for water treatment, which includes the following steps:

(1) Detect the raw water quality:

(2) When the raw water turbidity is higher than 80NTU, choose to run the sedimentation process; when the raw water turbidity is lower than 15NTU, choose to run the air flotation process; One process, determine to choose to run the air flotation process or the sedimentation process, preferably, the current operation mode can be run to avoid the problem of poor process stability caused by switching;

(3) Dosing agents: the dosage of flocculants containing iron or aluminum salts is 10-50mg/l, and the dosage of polymer flocculants containing iron or aluminum or iron and aluminum is 5-40mg/l l; the dosage of potassium permanganate is 0.5-2.0mg/l, and the dosage of sodium hypochlorite is 5-40mg/l; wherein, the flocculant is a salt or a polymer containing iron or aluminum or iron and aluminum, For example, aluminum sulfate, polyaluminum oxide, ferric chloride, ferrous sulfate sodium polyacrylate or carboxymethyl cellulose, etc.; potassium permanganate or sodium hypochlorite are coagulant aids;

(4) When running the air flotation process, when the raw water turbidity is less than 15NTU, the slag scraping cycle is 12 or 24 hours, that is, the operation time reaches 12 or 24 hours to scrape slag; when the raw water turbidity is 15-80NTU, run the air flotation process , the slag scraping cycle is 6 or 12 hours, that is, the running time reaches 6 or 12 hours to scrape slag;

When the sedimentation process is running, when the raw water turbidity is 15-80NTU, the mud scraping and mud removal cycle is 24 hours, that is, the operating time reaches 24 hours of mud scraping and mud removal; when the raw water turbidity is greater than 80NTU, run the sedimentation process and scrape mud , The mud discharge cycle is 6 or 12 hours, that is, the running time reaches 6 or 12 hours to scrape and discharge mud.

Preferably, when the air flotation process is in operation, after the flocculated water and dissolved air water are mixed in the contact area, they enter the separation area and then enter the slant plate gap of the inclined plate assembly, and the water adhered by the tiny bubbles formed by the dissolved air water is flocculated The impurity particles, which are impurity particles, float up to the water surface along the bottom surface of the inclined plate to form air flotation scum, which is removed by regular scraping; the clarified water after treatment enters the air flotation water collection pipe down the gap of the inclined plate and flows into the air flotation outlet channel, air flotation The outlet channel flows out into the next process (such as a filter).

Preferably, when the sedimentation process is in operation, the flocculated water enters the separation zone and then enters the slant plate gap of the slant plate assembly, and the flocs in the water, that is, the impurity particles, settle to the upper surface of the slant plate and slide down to the mud collection along the upper surface of the slant plate. The clear water after treatment flows horizontally along the crevices of the inclined plates to the perforated flower wall in the sedimentation water outlet area, and enters the sedimentation water outlet area of the sedimentation triangular weir catchment tank through the perforated flower wall in the sedimentation water outlet area, and the sedimentation water collection tank Flow into the sedimentation drain.

Preferably, the reflux water of the air flotation process must be taken from the effluent of the subsequent filter to avoid impurities in the water from clogging the dissolved air releaser.

Among them, the pressure dissolved air tank of the air flotation process must be installed close to the contact area to ensure the air flotation effect of the dissolved air water.

Compared with the prior art, the present invention has the beneficial effects: the flocculation area is changed to a mesh flocculation tank, small-hole grids are arranged in the vertical shaft, and the water flow through the small-hole grids can form good flocculation hydraulic conditions , to promote the flocculation reaction to form a good floc, which can achieve a good match with both the air flotation and sedimentation processes, and promote the best effect of the two processes; the end of the flocculation zone is equipped with a perforated flower wall, which can make the water and dissolved air after flocculation The water is evenly mixed and contacted, which reduces the disturbance and damage to the flocs, promotes the further fusion and growth of the flocs, and promotes the best treatment effect of the air flotation and sedimentation process. The dispersion of the baffle is uniform, which is conducive to the best effect of air flotation; the unicom valve is canceled on the baffle in the contact area, and the height of the baffle in the contact area is adjusted to be equal to the height of the bottom of the inclined plate assembly. It solves the problem that the connecting valve on the contact area causes difficulty in operation, affects the effect, construction and installation is difficult, and the connecting rod passes through the pool wall and is easy to leak water, which is easy to cause water cut-off maintenance accidents; , especially the sedimentation process, which produces a large obstacle, affects the flow of water into the inclined plate assembly, affects the water distribution conditions, and affects the treatment effect of the air flotation and sedimentation process; cancel the slag scraper at the top of the separation area and replace it with hydraulic slag discharge, using The water flow ejected from the scum flushing water pipe arranged on the top inner wall of the separation area pushes the scum on the water surface to move to the slag discharge tank, and then flows into the slag discharge tank for discharge. The reduction of mechanical equipment solves the problem that there are many parts of the slag scraper, which is prone to failure during operation, which affects the air flotation slag discharge and the operation of the air flotation process. The operation is simple and easy to realize automatic control; the redundant space at the bottom of the sedimentation water area is canceled And the perforated sludge discharge pipe is changed to a wedge-shaped sedimentation outlet area, and a slippery hole is set at the bottom, which is conducive to the sludge in the sedimentation outlet area falling naturally into the sludge collection area to avoid the problem of poor sludge discharge; The weir plate set inside controls the water level on the weir to control the water level in the separation area, so as to ensure that the operation of the air flotation process is not affected by the water level of the next process, and can ensure the normal and stable operation of the air flotation process; these improvement measures can further improve the operation of the air flotation and sedimentation process. The treatment effect ensures stable and efficient operation and achieves the best treatment effect.

Description of drawings

Fig. 1 is a schematic structural diagram of the air flotation and precipitation solid-liquid separation device for water treatment of the present invention; in the figure: 1 is a small hole mesh grid plate, 2 to 5 are flocculation reaction sections, 6 is a transition section, and 7 is a dissolution section. Air pipe, 8 is the inclined plate assembly, 9 is the mud hole, 10 is the slag discharge tank, 11 is the bottom of the sedimentation outlet area, 12 is the sedimentation outlet channel, 13 is the air flotation outlet channel, 14 is the air flotation water collection pipe, 15 is Mud discharge pipe, 16 is mud discharge valve, 17 is mud collection pit, 18 is mud scraper, 19 is contact area, 20 is contact area baffle, 21 is releaser, 22 is perforated mud discharge pipe, 23 is perforation in contact area Flower wall, 24 is the sedimentation outlet tank, 25 is the scum flushing water pipe, 26 is the perforated flower wall in the sedimentation outlet area, 19 is the mud collection area, 30 is the air flotation outlet area, 31 is the separation area, and 32 is the sedimentation outlet area.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Accompanying drawing has shown the concrete structure of preferred embodiment of the present invention. The structural characteristics of each component, if there is a description of the direction (up, down, left, right, front and rear), it is described with reference to the structure shown in Figure 1, where the arrow is the direction of water flow or sludge discharge, But the actual application direction of the present invention is not limited to this.

The air flotation and sedimentation solid-liquid separation device for water treatment, as shown in Figure 1, includes a flocculation zone, a contact zone 19, a separation zone 31, a mud collection zone 19 and a sedimentation water outlet zone 32, and the flocculation zone and the separation zone are arranged between The contact area 27, the separation area 31 is connected with the sedimentation water outlet area 32 through the perforated flower wall 26 of the sedimentation water outlet area, and the mud collection area 19 is set at the lower part of the separation area 31. The flocculation zone is composed of four reaction sections (the first reaction section 2, the second reaction section 3, the third reaction section 4, the first four reaction sections 5) and a transition section 6, and the reaction section is composed of a shaft , a small-hole mesh grid plate 1 is arranged in the shaft. The mesh size of the small-hole grid plate 1 is 20-50mm×20-50mm, and the thickness of the small-hole grid plate is 10-16mm. Preferably, the mesh diameter of the small-hole grid plate is 20 mm, and the thickness is 15 mm. The small-hole grid plate 1 is descended from the water inlet to the water outlet in the reaction section according to 4 layers, 3 layers, 2 layers, and 1 layer. The small-hole grid plate 1 is arranged in the center, and the layers are horizontal The spacing is 0.6m to 1.0m; the preferred horizontal spacing between layers is 0.8m. Perforated sludge discharge pipes 22 are arranged at the bottom of the four reaction sections (the first reaction section 2 , the second reaction section 3 , the third reaction section 4 , and the first four reaction sections 5 ) and one transition section 6 .

The transition section 6 of the flocculation zone and the contact zone 27 are connected by a perforated flower wall 23 in the contact zone; the water flow velocity of the perforated flower wall 23 in the contact zone is consistent. The touch area 27 is provided with a releaser 21 at the perforated flower wall 23 , and the releaser 21 is connected with the air-dissolving pipeline 7 .

The height of the baffle plate 20 set on the contact area 27 is consistent with the height of the bottom of the swash plate assembly 8 . The sedimentation outlet area 32 is wedge-shaped, and the bottom 11 of the sedimentation outlet area is slope-shaped, with an included angle of 50-55 degrees with the horizontal plane, preferably, an included angle of 53 degrees with the horizontal plane. Slippery mud holes 9 are arranged on the partition wall between the sedimentation outlet area 32 and the separation area 31 . A scum flushing water pipe 25 is provided around the top water surface of the separation zone 31 .

The mud collection area 19 has a flat bottom, and is provided with a mud scraper 18 and a mud collection pit 17 at the end. The mud collection pit 17 is connected to a mud discharge pipe 15, and a mud discharge valve 16 is arranged on the mud discharge pipe 15.

The separation area 31 is provided with a slagging tank 10 , and the clear water after the floc impurities are precipitated passes through the perforated flower wall 26 of the sedimentation water area, enters the sedimentation water area 32 , and flows into the sedimentation water channel 12 through the sedimentation water collection tank 24 . The air flotation outlet area 30 includes an air flotation outlet channel 13 and an air flotation water collection pipe 14 . The air flotation outlet channel 13 is located outside the sedimentation outlet channel 12 , and the air flotation water collection pipe 14 passes through the end pool wall of the separation zone 31 along the bottom of the inclined plate assembly 8 and is connected to the air flotation outlet channel 13 .

The separation area 31 is provided with a slant plate assembly 8, the slant plate assembly 8 connects and fixes the slant plates together through support rods, the installation angle of the slant plates is 50-55 degrees, and the distance between the slant plates is 30-40mm. Preferably, the installation angle of the inclined plate is 53 degrees (the included angle with the horizontal direction), and the distance between the inclined plates is 35mm, which is more coordinated with the overall system and has a better treatment effect.

When the air flotation process is running, the raw water enters the flocculation zone after being dosed with flocculation agents, and flows through the flocculation reaction section (2, 3, 4, 5) and the transition section 6 in sequence, and passes through the small hole grid plate (1) during the flow process. , and then flow through the perforated flower wall 23 in the contact area, and after mixing with the dissolved air water released by the releaser 23, flow into the separation area. In the contact zone, the tiny air bubbles released by the dissolved air water adhere to the flocs in the flocculated water, enter the separation zone and the inclined plate assembly 8, and rise to the water surface to form scum, which is sprayed by the scum flushing water pipe 25 The action of the water flow sweeps the scum on the water surface to the slag discharge tank 10 for discharge. The clear water after the floc impurities are removed enters the air flotation water collection pipe 14 and flows into the air flotation outlet channel 13 to enter the subsequent process.

When the sedimentation process is running: the raw water enters the flocculation zone after adding the flocculation agent, flows through the flocculation reaction section (2, 3, 4, 5) and the transition section 6 in turn, passes through the small hole grid plate 1 during the flow process, and then flows through the The contact area perforates the flower wall 23, and then flows into the separation area and the inclined plate assembly. In the separation area and the sloping plate gap of the sloping plate assembly, the floc impurity particles in the water settle on the sloping plate, slide down along the surface of the sloping plate to the mud collection area, and are scraped into the mud collection pit 17 by the mud scraper 18, and then pass through the drainage The mud pipe 15 is discharged. The clear water after the floc impurities are precipitated passes through the perforated flower wall 26 of the sedimentation outlet area, enters the sedimentation outlet area, and flows into the sedimentation outlet channel 12 through the sedimentation water collection tank 24 .

The air flotation and precipitation solid-liquid separation method for water treatment is based on the above-mentioned air flotation and precipitation solid-liquid separation device for water treatment, which includes the following steps:

(1) To test the raw water quality, the test items include turbidity, algae, permanganate index, ammonia nitrogen, iron, manganese, pH, temperature;

(2) According to the raw water quality, that is, the test result of step (1), choose to run the air flotation process or the sedimentation process. When the raw water turbidity is higher than 80NTU, choose to run the sedimentation process; when the raw water turbidity is lower than 15NTU, choose to run the air flotation process Floatation process; when the raw water turbidity is 15-80NTU, the two processes can be compared according to the treatment effect and operation requirements, and the air flotation process or the sedimentation process can be selected for operation;

(3) According to the test results of step (1), add chemicals to the raw water; determine the dosage of chemicals, use the raw water quality indicators detected in step (1), compare them with the historical raw water quality indicators in the past, and choose the closest The historical dosage corresponding to the historical raw water quality index is used as the current dosage, and then the dosage is adjusted according to the water effluent effect after flocculation, air flotation or sedimentation treatment, so as to achieve The best water effect. Record the dosage with the best water effluent effect as historical dosage data.

(4) Dosing agents: the dosage of flocculants containing iron or aluminum salts is 10-50mg/l, and the dosage of polymer flocculants containing iron or aluminum or iron and aluminum is 5-40mg/l l; the dosage of potassium permanganate is 0.5-2.0mg/l, and the dosage of sodium hypochlorite is 5-40mg/l; wherein, the flocculant is a salt or a polymer containing iron or aluminum or iron and aluminum, For example, such as aluminum sulfate, polyaluminum oxide, ferric chloride, ferrous sulfate sodium polyacrylate or carboxymethyl cellulose, etc.; potassium permanganate or sodium hypochlorite is a coagulant; preferably, the flocculation of iron-containing or aluminum-containing salts The dosage of flocculant is 20-30mg/l, the dosage of polymer flocculant containing iron or aluminum or iron and aluminum is 10-20mg/l; the dosage of potassium permanganate is 0.8-1.5mg/l The dosage of sodium hypochlorite is 15-25mg/l; more optimally, the dosage of flocculant containing iron or aluminum salts is 25mg/l, and the dosage of polymer flocculant containing iron or aluminum or iron and aluminum The dosage is 15mg/l; the dosage of potassium permanganate is 1.2mg/l, and the dosage of sodium hypochlorite is 20mg/l;

(5) When the air flotation process is running, after the flocculated water and dissolved air water are mixed in the contact area, they enter the separation area and then enter the slant plate gap of the inclined plate assembly, and the water adhered by the tiny bubbles formed by the dissolved air water is flocculated The impurity particles float up to the water surface along the bottom surface of the sloping plate to form air flotation scum, which is removed by regular scraping; the clarified water after treatment enters the air flotation water collection pipe 14 down the slant plate gap and flows into the air flotation outlet channel 13, The air flotation outlet channel 13 flows out and enters the next step process (such as a filter tank).

(6) When the sedimentation process is running, the flocculated water enters the separation zone and then enters the gap of the inclined plate assembly, and the flocs in the water, that is, impurity particles, settle to the upper surface of the inclined plate and slide down to the mud collection along the upper surface of the inclined plate The clear water after treatment flows horizontally along the crevice of the inclined plate to the perforated flower wall 26 in the sedimentation water outlet area, and enters the sedimentation water outlet area of the sedimentation triangular weir catchment tank through the perforated flower wall 26 in the sedimentation water outlet area, and the sedimentation The sump 24 flows into the sedimentation outlet channel 12 .

(7) Determine the slag scraping cycle of the air flotation process and the mud scraping and discharge cycle of the sedimentation process according to the raw water quality. Run the air flotation process, when the raw water turbidity is less than 15NTU, the scraping cycle is 12 or 24 hours, that is, the operation time reaches 12 or 24 hours to scrape the slag; when the raw water turbidity is 15-80NTU, run the air flotation process, the scraping cycle It is 6 or 12 hours, that is, the running time reaches 6 or 12 hours to scrape slag.

When the sedimentation process is running, when the raw water turbidity is 15-80NTU, the mud scraping and mud removal cycle is 24 hours, that is, the operating time reaches 24 hours of mud scraping and mud removal; when the raw water turbidity is greater than 80NTU, run the sedimentation process and scrape mud , The mud discharge cycle is 6 or 12 hours, that is, the running time reaches 6 or 12 hours to scrape and discharge mud.

(8) The reflux water of the air flotation process must be taken from the effluent of the subsequent filter tank to prevent impurities in the water from clogging the dissolved air releaser.

(9) Air flotation process The pressure dissolved air tank must be installed close to the contact area to ensure the air flotation effect of dissolved air water.

The invention detects a number of raw water quality indicators, which are used to determine the type and method of adding chemicals, compares the water quality indicators of raw water with the historical raw water quality indicators, takes the historical drug dosage as the current drug dosage, and performs drug dosage. Plus, it can improve the accuracy of the dosage, improve the treatment effect and save the consumption of medicine. The operation method and steps given are the method of using the overall process to treat various impurities in water, not a single treatment of algae, which improves the application range of the process and facilitates the effective use of the process. Especially for raw water with long-term low turbidity, low temperature and low turbidity, which is difficult to treat, and accompanied by high turbidity, this kind of raw water which is difficult to treat provides a good method.

For the selection and switching conditions of the air flotation process and the sedimentation process, further optimization and clarification of the parameters, further optimization and determination of the chemical dosage in the process operation, and the determination, control and adjustment methods of the chemical dosage in the process operation are given. The further optimization of the plate angle and spacing gives the mud scraping and slag scraping cycle during the process operation. These specific parameters and operation methods can further improve the processing effect of the process operation, ensure the stable and efficient operation of the process, and ensure the process treatment The subsequent water quality is further improved.

Effect verification

Verification example 1 Treatment of river raw water (operating air flotation process)

Detect the quality of the raw water, determine the selection of the air flotation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. The dosage of polyaluminum chloride is 30mg/L, and potassium permanganate is added at the same time 0.6mg/L; the reflux ratio is 5.5%, the dissolved air pressure is 0.35MPa; the scraping cycle is determined to be 12 hours.

After testing, the influent water quality: turbidity 23NTU, algae 28 million/L, organic matter content (permanganate index) 5.7mg/L; effluent water quality: turbidity 0.5NTU, algae 460,000/L, organic matter (high Manganate index) content of 2.2mg/L.

Verification example 2 treatment of river raw water (operating air flotation process)

Detect the quality of the raw water, determine the selection of the air flotation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. The dosage of ferric chloride is 5mg/L, and potassium permanganate is added at the same time 0.5mg/L; the reflux ratio is 6%, and the dissolved gas pressure is 0.38MPa. The scraping period is determined to be 12 hours.

After testing, the influent water quality: turbidity 5.5NTU, 47 million algae/L, organic matter content (permanganate index) 2.7mg/L; effluent water quality: turbidity 0.38NTU, 520,000 algae/L, organic matter content 1.2mg/L.

Verification example 3 treatment of lake raw water (operating air flotation process)

Detect the quality of the raw water, determine the selection of the air flotation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. The dosage of ferric chloride is 7mg/L; the reflux ratio is 6%, the dissolved air pressure is 0.40MPa; the scraping cycle is determined to be 12 hours.

After testing, the influent water quality: turbidity 2.5NTU, 74 million algae/L, organic matter content (permanganate index) 1.8mg/L; effluent water quality: turbidity 0.45NTU, 950,000 algae/L, organic matter ( Permanganate index) content 0.9mg/L.

Verification example 4 treatment of lake raw water (operating air flotation process)

Detect the quality of the raw water, determine the selection of the air flotation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. Polyaluminum chloride 24mg/L, at the same time dosing 3mg/L sodium hypochlorite; reflux ratio 6%, dissolved air pressure 0.38MPa; slag scraping cycle is determined to be 12 hours.

After testing, the influent water quality: turbidity 5.3NTU, algae 48.1 million/L, organic matter content 2.3mg/L; effluent water quality: turbidity 0.51NTU, algae 980,000/L, organic matter content 1.0mg/L.

Verification Example 5 Treatment of River Raw Water (Operating Sedimentation Process)

Detect the quality of the raw water, determine the selection of the sedimentation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. The dosage of polyaluminum chloride is 35mg/L, and potassium permanganate is added at the same time 0.8mg/L; the period of scraping and discharging mud is determined to be 6 hours.

After testing, the influent water quality: turbidity 610NTU, algae 15 million/L, organic matter content (permanganate index) 5.6mg/L; effluent water quality: turbidity 2.0NTU, algae 2.2 million/L, organic matter (high Manganate index) content of 2.3mg/L.

Verification Example 6 Treatment of Lake Raw Water (Operating Sedimentation Process)

Detect the quality of the raw water, determine the selection of the sedimentation process according to the test results of the raw water quality indicators, and determine the type and method of dosage; compare the historical raw water quality to select the historical dosage with similar water quality. The dosage of polyaluminum chloride is 40mg/L, and sodium hypochlorite is added at the same time 4.5mg/l; the mud scraping and mud discharge cycle is determined to be 12 hours.

After testing, the influent water quality: turbidity 250NTU, algae 59.4 million/L, organic matter content (permanganate index) 2.1mg/L; effluent water quality: turbidity 0.73NTU, algae 3.5 million/L, organic matter (high Manganate index) content 0.8mg/L.

The above are only preferred embodiments of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the description of the invention are still the same. It belongs to the scope covered by the patent of the present invention.

Claims (10)

1. water process air supporting and sedimentation solid-liquid separation device, including flocculation zone, contact zone, Disengagement zone, mud collection area and it is settled out Pool, it is characterised in that contact zone is set between the flocculation zone and Disengagement zone, and it is heavy that the Disengagement zone passes through with deposit exhalant region Shallow lake exhalant region perforation tracery wall connection, the Disengagement zone lower part set mud collection area, and the flocculation zone is by four conversion zones and one Transition forms, and the conversion zone directly by wall interval, is made of vertical shaft in the conversion zone, is set in the vertical shaft Fine-structure mesh flase floor.

2. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that the fine-structure mesh The mesh size of flase floor is 20~50mm × 20~50mm, 16~10mm of thickness of the fine-structure mesh flase floor.

3. water process air supporting according to claim 2 and sedimentation solid-liquid separation device, it is characterised in that the fine-structure mesh Described in flase floor from water inlet end to water outlet on conversion zone, the conversion zone successively decreases by 4 layers, 3 layers, 2 layers, 1 layer, the fine-structure mesh Flase floor is centrally arranged, and interlayer level interval is 0.6m~1.0m.

4. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that described to be settled out Pool is wedge shape, and deposit exhalant region bottom is in ramped shaped, and slip hole is set on the division wall of deposit exhalant region and Disengagement zone.

5. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that the mud collection area For flat construction, mud scraper is set thereon, collection mud pit is set in mud collection area end.

6. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that air supporting exhalant region The upper setting gentle float assembly water pipe of air supporting outlet canal, air supporting collector pipe are arranged on below inclined plate group and are connected with air supporting outlet canal.

7. water process air supporting according to claim 6 and sedimentation solid-liquid separation device, it is characterised in that the air supporting goes out For water channel positioned at the outside of precipitation outlet canal, air supporting collector pipe passes through Disengagement zone end pool wall along type sloping plate component bottom, and is connected to Air supporting outlet canal.

8. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that the Disengagement zone Type sloping plate component is set, and the plate component is by supporting roofbolt that inclined plate is connected and fixed, wherein the installation of the inclined plate Angle is 45~65 degree, and inclined plate spacing is 25-45mm.

9. the air supporting of water process and precipitation solid-liquid separating method, based on any water process air supportings of claim 1-8 with sinking The step of shallow lake equipment for separating liquid from solid, it includes, is as follows：

(1) raw water quality is detected：

(2) when raw water turbidity is higher than 80NTU, selection operation depositing technology；When raw water turbidity is less than 15NTU, selection operation Air-float technology；

(3) medicament is added：The dosage of the flocculant of iron content or aluminium containing salt class is 10-50mg/l, iron content or aluminium or iron and aluminium The dosage of polymer flocculants is 5-40mg/l；Potassium permanganate dosage is 0.5-2.0mg/l, sodium hypochlorite dosage is 5- 40mg/l；

(4) when running air-float technology, when raw water turbidity is less than 15NTU, when scum period is 12 or 24 small；Work as raw water turbidity During 15-80NTU, when running air-float technology, when scum period is 6 or 12 small；

Run depositing technology when, as raw water turbidity 15-80NTU, scrape mud, sludge discharging period for 24 it is small when；When raw water turbidity is more than During 80NTU, run depositing technology, scrape mud, sludge discharging period for 6 or 12 it is small when.

10. water process air supporting according to claim 1 and sedimentation solid-liquid separation device, it is characterised in that operation air supporting During technique, after the water after flocculation is mixed with dissolved air water in contact zone, into Disengagement zone after enter type sloping plate component inclined plate gap in, Floccule body, that is, impurity particle in the water that the micro-bubble formed by dissolved air water adheres to, the water surface is floated up to along inclined plate basal surface, is formed Air-flotation scum, is removed by periodically scraping slag；The clear water clarified after processing is downwardly into air supporting collector pipe along inclined plate gap and flows into gas Emersion water channel；When running depositing technology, the water after flocculation enters in the inclined plate gap of type sloping plate component after entering Disengagement zone, in water Floccule body, that is, impurity particle is settled down to the upper surface of inclined plate, mud collection area is snapped down to along inclined plate upper surface, by periodically scraping mud, spoil disposal Remove；The clear water clarified after processing flows to deposit exhalant region perforation tracery wall along inclined plate gap horizontal direction, through deposit exhalant region Tracery wall of perforating enters the deposit exhalant region of precipitation triangular-notch weir catch basin, and precipitation catch basin flows into precipitation outlet canal.