CN109692508B - Gas-water back flushing system of sand filter - Google Patents
Gas-water back flushing system of sand filter Download PDFInfo
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- CN109692508B CN109692508B CN201910055788.9A CN201910055788A CN109692508B CN 109692508 B CN109692508 B CN 109692508B CN 201910055788 A CN201910055788 A CN 201910055788A CN 109692508 B CN109692508 B CN 109692508B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
- B01D24/105—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container downward filtration without specifications about the filter material supporting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
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Abstract
The invention discloses a sand filter air-water backwashing system, wherein an automatic control device changes the overflow direction of a water-driven three-way valve, the free switching between the filtering process and the backwashing process can be realized, an air-water mixing device is fixed on a pipeline through a connecting flange, an air-water mixing cavity is arranged in the air-water mixing device, a free turnover water separator, an umbrella-shaped water baffle, an annular air pipe and a metal net are sequentially arranged in the air-water mixing cavity from bottom to top, and the air-water mixing device is provided with an air lock quick connector and is connected with an automatic inflating device through an air pipe. On the basis of not changing the structure of the traditional sand filter, the invention rapidly realizes the air-water back flushing function by simply adding the air-water mixing device and the automatic air charging device, the back flushing water consumption and the power consumption are obviously reduced, and the back flushing effect is obviously improved, thereby ensuring the continuous and healthy operation of an irrigation system.
Description
Technical Field
The invention belongs to the technical field of filtering and back flushing systems in the field water conservancy industry, and particularly relates to a gas-water back flushing system of a sand filter.
Background
The sand filter is generally applied to head engineering of a micro-irrigation system and is mainly used for filtering organic matters, sediment, solid particles and other impurities in raw water so as to ensure that the quality of the filtered water meets the use requirement. The back flushing is to clean impurities adsorbed on the surface and trapped in pores of the filter material of the sand filter, water flows in the sand filter in a reverse direction from bottom to top, the filter material expands and rises under the action of water flow, collision and friction occur among filter material particles, and then the impurities fall off and are cleaned. The traditional back flushing mode of the sand filter, namely that the sand filter is independently flushed by clear water and applied to practical engineering for years, is a common back flushing mode. When the clear water is used for cleaning the filter material independently, the expansion height of the filter material is generally about 15-20 cm, and the flushing time is generally controlled to be about 8 minutes. The sand filter is usually used in combination, when the head loss of the sand filter reaches a preset value, the automatic control system starts the water-operated three-way valve to change the water flow direction in the sand filter, so that the cleaning of the filter material in the sand filter is completed.
The sand filter adopts the independent cleaning mode of traditional clear water, can guarantee the filter material cleanness to a certain extent, but the following problem exists in the use, and the filter material runs off easily to appear in the rivers intensity when back flush, and the intensity is too little can't accomplish the inside impurity of filter material and thoroughly clear away, and suitable back flush rivers intensity is significant to the sand filter. At present, the study of the sand filter by adopting air-water back flushing is mainly carried out in a laboratory, air is input into a water collecting cavity of the filter through an air compressor, and enters a filter material cavity through a filter cap after being mixed with water flow, so that under the combined action of gas and water flow, the collision friction probability of the filter material is enhanced, and the impurities in the filter material are removed. The air-water back flushing has the advantages that the water flow strength can be reduced, the water consumption is greatly reduced, the loss phenomenon of filter materials is controlled, and the cleanliness of the filter materials after back flushing is obviously better than that of the traditional clear water single flushing mode.
The inventor of the patent has found that the turbidity reduction rate of the sewage discharged by the air-water back flushing is faster, and the filter material cleaning can be completed in a shorter time. Under the condition of the same water flow intensity, the interior of the filter material is not thoroughly cleaned after the traditional back flushing, and a large amount of sewage is discharged after the back flushing intensity is increased. The cleanliness of the filter material after the air-water back flushing is higher, the new filtering cycle is obviously improved, and the back flushing frequency is reduced. At present, the air-water back-flushing air-filling mode is coarser, an air compressor is generally required to be equipped, the air distribution uniformity is poor, dead angles exist in back flushing, the sand filter air-water back-flushing system is designed aiming at the problems, the purpose of improving the distribution uniformity of air in a filter is achieved, and the full-automatic air-water back flushing of the existing sand filter is achieved through low-cost investment.
The patent with the air-entrapping back-flushing function is disclosed in the patent with the publication number CN207203571U, and mainly comprises the steps of adding a porous rubber membrane on a supporting plate of the sand filter, inputting air into the porous rubber membrane by an air compressor, and then entering the sand filter through an air outlet to realize air-water back flushing. However, the prior sand filter supporting plate structure is required to be greatly changed, the air holes of the porous rubber diaphragm are easy to be blocked so as to influence the air distribution uniformity, and the air compressor occupies large space and has high energy consumption, so that the prior sand filter supporting plate structure has certain difficulty in the practical application process.
Disclosure of Invention
The invention solves the technical problem of providing a sand filter air-water back flushing system which is simple in structure and reasonable in design, and is used for effectively solving the problems existing in the existing sand filter air-water back flushing process, promoting the air and water to be fully mixed, realizing back flushing without dead angles, improving back flushing effect and continuously and stably providing safe water for a water conservancy irrigation system.
The invention adopts the following technical scheme for solving the technical problems, and is characterized by comprising a combined sand filter, a gas-water mixing device, an automatic inflating device and an automatic control device, wherein a water inlet of the combined sand filter is respectively connected with a water inlet pipe and a sewage draining pipe in parallel through a water-driven three-way valve, a water outlet of the combined sand filter is respectively connected with a water outlet pipe and a gas transmission pipe in parallel through the gas-water mixing device, and the sand filter comprises a supporting plate, a filter cap fixed on the supporting plate and a filter material filled on the filter cap;
the air-water mixing device is fixed on a pipeline through a flange, an air-water mixing cavity is arranged in the air-water mixing device, a freely-turnover water separator, an umbrella-shaped water baffle, an annular air pipe and a metal net are sequentially arranged in the air-water mixing cavity from bottom to top, water spraying holes are arranged on the surface of the water separator, an opening of the umbrella-shaped water baffle is downward and is arranged right above the water spraying holes of the water separator, the metal net and the annular air pipe are respectively fixed on the inner side wall of the air-water mixing cavity, and the annular air pipe penetrates through the side wall of the air-water mixing cavity in a sealing mode and is connected with an air pipe through an electromagnetic valve and an air lock quick connector;
the automatic inflation device is internally provided with a miniature air pump, a controller, an air tank and a pressure sensor, and the controller starts the miniature air pump to work according to the monitoring value of the pressure sensor, so that the automatic inflation process of the device is realized;
the automatic control device is used for controlling switching of electromagnetic valves in the parallel water-operated three-way valve and the parallel air-water mixing device, and free switching of the filtering and back flushing processes of the combined sand filter is realized.
Further preferably, the water separator is a circular water separator consisting of fan-shaped water separation units with an included angle of 60 degrees, the fan-shaped water separation units are fixed on the inner side wall of the air-water mixing cavity through included angle springs and can freely turn over the fan-shaped water separation units under the action of the included angle springs, the fan-shaped water separation units turn over vertically downwards in the filtering process, the fan-shaped water separation units turn over horizontally in the back flushing process, and water spraying holes are arranged on the surfaces of the water separator and used for improving the water flow speed by reducing the overflow area.
Further preferably, the air holes which are inclined horizontally downwards and aligned with the area in front of the water separator and the umbrella-shaped water baffle are arranged on the inner side of the annular air pipe.
Further preferably, the umbrella-shaped water baffle is opposite to the direction of the water spraying hole of the water distributor in a horizontal state, and the angle of the umbrella-shaped water baffle is 45 degrees downwards in an inclined manner, so that the turbulence degree of water flow is further improved, and the water is convenient to mix with gas fully.
Further preferably, the metal mesh is a 301 stainless steel metal sintering mesh, and the pore diameter is controlled to be 5mm.
Further preferably, the automatic inflating device monitors the pressure of the gas tank through a pressure sensor, and a low-energy miniature air pump is used for continuously and stably supplying gas to the gas tank.
The invention relates to an operation method of a sand filter air-water backwashing system, which is characterized by comprising the following specific processes: raw water to be filtered enters the sand filter through the water inlet pipe, impurities in the water are intercepted in filter material pores or adsorbed on the surface of the filter material, and filtered water enters the water collecting cavity through the filter cap and then enters the field pipe network; along with the continuous increase of the inside impurity of grit filter, when head loss reaches the default, automatic control device control starts the back flush process, accomplish the cleaning work of grit filter one by one, the water-operated three-way valve changes inside rivers passageway according to automatic control device instruction, other grit filters filter back water reverse direction gets into to wait to wash inside the grit filter, the filter material takes place to expand under the rivers effect, impurity is along with filter material collision friction and drops, discharge through the drain afterwards, through setting up air-water mixing arrangement at grit filter delivery port, realize the filter material inflation under the effect of gas, strengthen the expansion friction between the filter material, improve back flush efficiency and guarantee the filtration water quality of water, adopt low energy consumption miniature air pump to aerify for the gas pitcher, accomplish the gas-filled process of gas pitcher during the filtration, automatic control device starts air-water mixing arrangement side solenoid valve during back flush, gas and water are through air-water mixing arrangement intensive mixing, get into inside the grit filter later and accomplish the back flush process.
Further preferably, the air-water mixing device is connected with the pipeline in a flange mode, the electromagnetic valve is opened by the automatic control device during back flushing through a signal line output instruction, gas in the automatic air charging device enters the air-water mixing device through the gas transmission pipe, the gas is sprayed out through the gas holes on the annular gas pipe, the gas hole holes incline downwards, back flushing water flow enters the air-water mixing device from bottom to top, the water separator is in a horizontal state under the action of the included angle spring, water flow is sprayed out through the water spraying holes on the water separator, the flow state of the water flow is changed from pipe flow to jet flow, the water spraying holes are uniformly distributed on four concentric circles, the water flow collides with the umbrella-shaped water baffle right above after passing through the water spraying holes, the umbrella-shaped water baffle realizes the turbulent state of the water spraying flow, the gas enters the area between the umbrella-shaped water baffle and the water separator through the gas holes, the gas and the water realize full mixing under the complex turbulent flow, the water flow carries the gas to pass through the metal net, the water is further improved and stabilizes the gas distribution uniformity in the water, the system is in the vertical downward direction under the action of the gravity effect of the water flow, the water separator is in the horizontal direction under the action of the included angle spring and upward water flow gravity, the water distributor is in the horizontal direction under the action of the water flow when the back flushing is filtered, the water flow is in the horizontal state under the action of the effect of the water flow and the water flow distribution is turned from the water separator under the action of the water flow valve due to the effect.
Compared with the prior art, the invention has the following beneficial effects: through setting up gas-water mixing arrangement, improve the misce bene degree of gas and water, filter material collision friction reinforcing under the gaseous effect, the impurity on filter material hole and surface drops more easily, promotes the cleanliness of back flush back filter material, and filtration cycle obtains the extension, and back flush water consumption and power consumption obviously decline play important role to maintaining the healthy operation of irrigation system.
Drawings
FIG. 1 is a schematic diagram of the filtration process of the present invention;
FIG. 2 is a schematic structural view of the backwash process of the present invention;
FIG. 3 is a schematic structural view of a gas-water mixing device according to the present invention;
FIG. 4 is a schematic view of the structure of the annular trachea;
FIG. 5 is a schematic view of the structure of the water separator;
FIG. 6 is a schematic view of the structure of the water separator and umbrella-shaped water baffle;
fig. 7 is a schematic structural view of a metal net.
In the figure: 1-water inlet pipe, 2-water driven three-way valve, 3-sand filter, 4-automatic control device, 5-filter material, 6-filter cap, 7-water collecting cavity, 8-gas-water mixing device, 801-flange, 802-screw hole, 803-gas-water mixing cavity, 804-metal mesh, 805-included angle spring, 806-water separator, 807-annular air pipe, 808-water spraying hole, 809-air hole, 810-umbrella-shaped water baffle, 9-electromagnetic valve, 10-water outlet pipe, 11-signal line, 12-air lock quick connector, 13-air pipe, 14-automatic charging device, 15-controller, 16-miniature air pump, 17-pressure sensor, 18-air tank and 19-blow off pipe.
Detailed Description
The technical scheme of the invention is described in detail with reference to the accompanying drawings, the air-water backwashing system of the sand filter comprises a combined sand filter 3, an air-water mixing device 8, an automatic air charging device 14 and an automatic control device 4, wherein a water inlet of the combined sand filter 3 is respectively connected with a water inlet pipe 1 and a drain pipe 19 in parallel through a water-operated three-way valve 2, a water outlet of the combined sand filter 3 is respectively connected with a water outlet pipe 10 and a gas pipe 13 in parallel through the air-water mixing device 8, the sand filter 3 comprises a supporting plate, a filter cap 6 fixed on the supporting plate and a filter material 5 filled on the filter cap 6, and a water collecting cavity 7 is arranged at the lower part of the supporting plate; the gas-water mixing device 8 is fixed on a pipeline through a flange 801 and a connecting screw hole 802, a gas-water mixing cavity 803 is arranged in the gas-water mixing device 8, a free turnover water separator 806, an umbrella-shaped water baffle 810, an annular air pipe 807 and a metal net 804 are sequentially arranged in the gas-water mixing cavity 803 from bottom to top, wherein water spraying holes 808 are arranged on the surface of the water separator 806, the umbrella-shaped water baffle 810 is downward opened and is arranged right above the water spraying holes 808 of the water separator 806, the metal net 804 and the annular air pipe 807 are respectively fixed on the inner side wall of the gas-water mixing cavity 803, and the annular air pipe 807 penetrates through the side wall of the gas-water mixing cavity 803 in a sealing mode and is connected with the gas transmission pipe 13 through an electromagnetic valve 9 and an air lock quick connector 12; the automatic inflation device 14 is internally provided with a micro air pump 16, a controller 15, an air tank 18 and a pressure sensor 17, wherein the controller 15 starts the micro air pump 16 to work according to the monitoring value of the pressure sensor 17, so that the automatic inflation process of the device is realized; the automatic control device 4 controls the switching of the electromagnetic valve 9 in the parallel water-operated three-way valve 2 and the parallel air-water mixing device 8 through the signal line 11, thereby realizing the free switching of the filtering and back flushing processes of the combined sand filter 3.
The water separator 806 is a circular water separator composed of fan-shaped water separation units with an included angle of 60 degrees, the fan-shaped water separation units are fixed on the inner side wall of the air-water mixing cavity 803 through included angle springs 805, free overturning of the fan-shaped water separation units can be achieved under the action of the included angle springs 805, the fan-shaped water separation units are overturned vertically downwards in the filtering process, the fan-shaped water separation units are overturned horizontally in the backwashing process, and water spraying holes 808 are arranged on the surface of the water separator 806 and used for improving the water flow speed by reducing the overflow area. Inside the annular air duct 807 is arranged an air hole 809 inclined horizontally downwards and aligned with the area in front of the water separator 806 and the umbrella-shaped water deflector. The umbrella-shaped water baffle 810 is opposite to the water spraying hole 808 of the water separator 806 in the horizontal state, and the angle of the umbrella-shaped water baffle is 45 degrees downwards in an inclined manner, so that the turbulence degree of water flow is further improved, and the water is convenient to fully mix with gas. The metal mesh 804 adopts a 301 stainless steel metal sintering mesh, and the aperture is controlled to be 5mm. The automatic inflator 14 monitors the pressure of the gas tank 18 through the pressure sensor 17, and continuously and stably supplies gas to the gas tank 18 by using the low-power miniature gas pump 16.
The invention relates to an operation method of a sand filter air-water backwashing system, which comprises the following specific operation processes: the first stage is that the sand filter 3 filters, raw water to be filtered enters the water inlet pipe 1 after being pressurized by the water pump, enters the sand filter 3 through the water-operated three-way valve 2, impurities are trapped in the holes of the filter material 5 or adsorbed on the surface of the filter material, filtered water enters the water collecting cavity 7 through the filter cap 6, enters the field pipe network through the connecting pipeline, and finally is conveyed to the root zone soil of field crops, and the specific process is shown in figure 1. The second stage is back flushing of the sand filter 3, with the continuous increase of the trapped impurities of the filter material 5, the continuous increase of the head loss of the sand filter 3, when the preset value is reached, the back flushing of the system is started, the back flushing is sequentially carried out on each sand filter 3 according to the program, the water-operated three-way valve 2 is started through the automatic control device 4, the internal circulation channel is adjusted, the back flushing process is shown in fig. 2, part of filtered water enters a field pipe network, part of filtered water enters the sand filter 3 needing back flushing, water firstly enters the water collecting cavity 7 through the connecting pipeline, enters the sand filter 3 through the filter cap 6, the expansion of the filter material 5 occurs under the action of water flow, the adsorbed and trapped impurities of the filter material 5 begin to fall off, and the sewage carrying impurities is discharged through the sewage discharging pipe 19 after passing through the water-operated valve 2. The system is provided with the air-water mixing device 8, the water flow direction in the air-adding back flushing process is the same as that in the traditional pure water back flushing process, the difference is the source of the air and the air distribution mode, and the system is characterized in that the automatic air charging device 14 monitors the internal pressure of the air tank 18 through the pressure sensor 17, and the controller 15 starts the micro air pump 16 to work according to the set pressure range value, so that the stable flow of air is provided for the air-adding back flushing. The air-water mixing device 8 is connected with a pipeline in a flange 801 mode, the electromagnetic valve 9 is opened by the automatic control device 4 during back flushing, air in the automatic air charging device 14 enters the air-water mixing device 8 through the air pipe 13, the air is sprayed out through the air hole 809 on the annular air pipe 807, the opening angle of the air hole 809 and the horizontal included angle are 45 degrees, back flushing water flow enters the air-water mixing device 8 from bottom to top, the water separator 806 is in a horizontal state under the action of the included angle spring 805, the water flow passes through the water spraying holes 808 on the water separator 806, the water flow speed is rapidly improved due to the reduction of the water flow section, the water flow state is changed into jet flow from pipe flow, the water spraying holes 808 are uniformly distributed on four concentric circles, the water flow collides with the umbrella-shaped water baffle 810 right above after passing through the water spraying holes 808, the umbrella-shaped water baffle 810 can better realize the turbulent state of the jet water flow through the air hole 809, the air enters between the umbrella-shaped water baffle 810 and the water separator 806, the air and the water are fully mixed under the complex water flow turbulent state, the water flow carries the air through the metal net 804, and the distribution uniformity of the air in the water is further improved and stabilized; when the system filters, the water separator 806 is in a vertical downward direction under the action of water flow gravity, and when in back flushing, the water separator 806 is in a horizontal direction under the action of the included angle spring 805 and upward water flow, and because the number of water spraying holes 808 on the water separator 806 is small, the water flow state is changed from pipe flow to jet flow, so that the water separator 806 can receive water flow thrust, and the water separator can freely turn up and down.
While the basic principles of the invention have been shown and described, there are various changes and modifications to the invention, which fall within the scope of the invention as hereinafter claimed, without departing from the spirit and scope of the invention.
Claims (6)
1. The air-water backwashing system of the sand filter is characterized by comprising a combined sand filter, an air-water mixing device, an automatic air charging device and an automatic control device, wherein a water inlet of the combined sand filter is respectively connected with a water inlet pipe and a sewage discharge pipe in parallel through a water-driven three-way valve, a water outlet of the combined sand filter is respectively connected with a water outlet pipe and a gas transmission pipe in parallel through the air-water mixing device, and the sand filter comprises a supporting plate, a filter cap fixed on the supporting plate and a filter material filled on the filter cap;
the air-water mixing device is fixed on a pipeline through a flange, an air-water mixing cavity is arranged in the air-water mixing device, a freely-turnover water separator, an umbrella-shaped water baffle, an annular air pipe and a metal net are sequentially arranged in the air-water mixing cavity from bottom to top, water spraying holes are arranged on the surface of the water separator, an opening of the umbrella-shaped water baffle is downward and is arranged right above the water spraying holes of the water separator, the metal net and the annular air pipe are respectively fixed on the inner side wall of the air-water mixing cavity, and the annular air pipe penetrates through the side wall of the air-water mixing cavity in a sealing mode and is connected with an air pipe through an electromagnetic valve and an air lock quick connector;
the water separator is a circular water separator consisting of fan-shaped water separation units with an included angle of 60 degrees, the fan-shaped water separation units are fixed on the inner side wall of the air-water mixing cavity through included angle springs and can realize free overturning of the fan-shaped water separation units under the action of the included angle springs, the fan-shaped water separation units are overturned to be vertical and downward in the filtering process, the fan-shaped water separation units are overturned to be horizontal in the backwashing process, and water spraying holes are arranged on the surfaces of the water separator and used for improving the water flow speed by reducing the overflow area;
the inner side of the annular air pipe is provided with an air hole which is inclined horizontally downwards and is aligned to the area in front of the water separator and the umbrella-shaped water baffle;
the automatic inflation device is internally provided with a miniature air pump, a controller, an air tank and a pressure sensor, and the controller starts the miniature air pump to work according to the monitoring value of the pressure sensor, so that the automatic inflation process of the device is realized;
the automatic control device is used for controlling switching of electromagnetic valves in the parallel water-operated three-way valve and the parallel air-water mixing device, and free switching of the filtering and back flushing processes of the combined sand filter is realized.
2. The sand filter air water backwash system of claim 1 wherein: the umbrella-shaped water baffle is opposite to the direction of the water spraying hole of the water distributor in a horizontal state, and the angle of the umbrella-shaped water baffle is 45 degrees downwards in an inclined mode and is used for further improving the turbulence degree of water flow and facilitating the thorough mixing with gas.
3. The sand filter air water backwash system of claim 1 wherein: the metal net adopts a 301 stainless steel metal sintering net, and the aperture is controlled to be 5mm.
4. The sand filter air water backwash system of claim 1 wherein: the automatic inflating device monitors the pressure of the gas tank through the pressure sensor, and a low-energy-consumption miniature air pump is used for continuously and stably supplying gas to the gas tank.
5. A method of operating a sand filter air water backwash system as claimed in claim 1, comprising the steps of: raw water to be filtered enters the sand filter through the water inlet pipe, impurities in the water are intercepted in filter material pores or adsorbed on the surface of the filter material, and filtered water enters the water collecting cavity through the filter cap and then enters the field pipe network; along with the continuous increase of the inside impurity of grit filter, when head loss reaches the default, automatic control device control starts the back flush process, accomplish the cleaning work of grit filter one by one, the water-operated three-way valve changes inside rivers passageway according to automatic control device instruction, other grit filters filter back water reverse direction gets into to wait to wash inside the grit filter, the filter material takes place to expand under the rivers effect, impurity is along with filter material collision friction and drops, discharge through the drain afterwards, through setting up air-water mixing arrangement at grit filter delivery port, realize the filter material inflation under the effect of gas, strengthen the expansion friction between the filter material, improve back flush efficiency and guarantee the filtration water quality of water, adopt low energy consumption miniature air pump to aerify for the gas pitcher, accomplish the gas-filled process of gas pitcher during the filtration, automatic control device starts air-water mixing arrangement side solenoid valve during back flush, gas and water are through air-water mixing arrangement intensive mixing, get into inside the grit filter later and accomplish the back flush process.
6. The method of operating a sand filter air water backwash system of claim 5 wherein: the automatic control device outputs an instruction through a signal line to open the electromagnetic valve during back flushing, gas in the automatic inflating device enters the gas-water mixing device through the gas transmission pipe, the gas is sprayed out through the gas hole on the annular gas pipe, the hole opening of the gas hole is inclined horizontally downwards, back flushing water flow enters the gas-water mixing device from bottom to top, the water separator is in a horizontal state under the action of the included angle spring, water is sprayed out through the water spraying holes on the water separator, the flow speed of the water flow is rapidly improved due to the reduction of the water cross section, the flow state of the water flow is changed into jet flow from pipe flow, the water spraying holes are uniformly distributed on three concentric circles, the water flow collides with the umbrella-shaped water baffle right above after passing through the water spraying holes, the umbrella-shaped water baffle realizes the turbulent flow state of the water spraying, the gas enters the area between the umbrella-shaped water baffle and the water separator through the gas hole, the gas and the water are fully mixed under the complex water turbulent flow, the water flow carries the gas to pass through the metal net, the water distribution uniformity is further improved and stabilized, the water distribution uniformity in the water is in the water system is in the vertical downward direction under the action of the water flow gravity, the water distributor is in the horizontal direction under the action of the water flow gravity, and the water flow distribution of the water separator is in the horizontal direction under the action of the effect of the included angle spring and the upward water flow when the water distributor is in the system is in the direction due to the free flow state due to the fact that the number of the water flow distribution of the water flow from the water flow state is turned over from the water flow state to the water flow state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910055788.9A CN109692508B (en) | 2019-01-19 | 2019-01-19 | Gas-water back flushing system of sand filter |
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| CN201910055788.9A CN109692508B (en) | 2019-01-19 | 2019-01-19 | Gas-water back flushing system of sand filter |
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| CN109692508A CN109692508A (en) | 2019-04-30 |
| CN109692508B true CN109692508B (en) | 2023-09-19 |
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| CN112794498B (en) * | 2020-12-28 | 2022-08-30 | 中科洁力（福州）环保技术有限公司 | Intelligent efficient water purification system |
| CN113413685A (en) * | 2021-07-12 | 2021-09-21 | 江苏核工业格林水处理有限责任公司 | Filter filler external recovery system |
| CN115108596A (en) * | 2022-07-04 | 2022-09-27 | 广东大禹水利建设有限公司 | Artificial wetland flow pipeline arrangement method based on gas-water mixing |
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