CN105536348B - A kind of minute-pressure flushing type desilting filtration system facility and its application - Google Patents

Abstract

A micro-pressure flushing sand settling filter system facility and its application provided by the present invention include a settling tank, an overflow storage tank, an inner filtering pool, and an outer filtering pool. Set up a lateral overflow weir and lead to the overflow storage tank. The upper end of the side wall on the other side of the tail of the grit chamber connects the grit chamber and the filter inner tank through the water inlet pipe and the attached valve, and the end of the filter inner tank and the filter outer tank pass through a pipeline Connect with attached valve. The present invention adopts a brand-new system facility combining micro-pressure flushing sand settling and "soft filtration", adopts the self-weight principle of surface water and the comprehensive design of water head, and overcomes the easy blockage of filtration equipment caused by "hard filtration" , poor filtration, low filtration efficiency, high investment and operating costs, with high water and sand separation efficiency, small footprint, extremely low investment and operation costs, safe use, simple maintenance, green and environmental protection sand filtration system facilities, Has a wide range of practicability.

Description

A kind of micro-pressure flushing sand filtration system facility and its application

technical field

The invention belongs to the technical field of farmland water utilization water filtration system facilities, and more specifically, the invention relates to the technical field of a flushing sand sedimentation filtration facility suitable for farmland water utilization water.

Background technique

my country's per capita water resources are only 1/4 of the world's per capita, and the distribution of water resources is extremely uneven. The contradiction between the shortage of water resources and the incompatibility of economic development has become increasingly prominent. Drought and water shortage have seriously affected the development of my country's industry and agriculture. To ensure my country's water security, ecological security and food security, it is necessary to alleviate the contradiction between supply and demand of water resources. According to the country's most stringent water resource management requirements, groundwater has no potential to be used. In the future, surface water will become the main water source for new micro-irrigation projects. At present, most of the surface water comes from mountain rivers, which have the characteristics of high sediment content. It cannot be directly used for irrigation. How to reduce the cost of surface cement sand treatment has become a key factor in promoting efficient water-saving technologies.

At present, the methods for treating sediment in surface water mainly adopt various methods such as ordinary sedimentation tanks plus filters, river water drip irrigation gravity sedimentation filter tanks, etc., but mainly use the combination of electricity and machinery, which has high investment and operation costs and high maintenance costs. high cost. The filtration method is the most common "hard filtration", that is, the filtration facilities are made of fixed hard filter materials, such as steel, stainless steel and other materials, and the muddy water containing sediment is filtered through the fixed hard filter equipment. In the process, because the muddy water containing sediment enters the fixed hard filter material under the action of the water pump at a relatively high pressure, the filter network points of the hard filter material are easily blocked.

A film composed of sediment and biological lichen is formed on the inner surface of the hard filter equipment, thereby reducing the filtration efficiency; and the whole system has the disadvantages of small footprint, high investment, difficult maintenance, high energy consumption, and high operating cost. Therefore, it is necessary to upgrade and transform the existing sand filtration system to overcome existing problems and deficiencies, thereby saving manpower and material resources and ensuring water safety.

Contents of the invention

Aiming at the deficiencies and existing problems of the current state of the art, such as poor filtering effect, high input and operating costs, and difficult maintenance, the "hard filtration" method commonly used in domestic and foreign treatment of silt-containing surface water in farmland water conservancy irrigation, the present invention provides a The micro-pressure flushing sand sedimentation filtration system and its application adopts a new system facility combining micro-pressure flushing sand sedimentation and "soft filtration". Combining the self-weight principle and the comprehensive design of the water head, a micro-pressure flushing sand filtration system is provided, which overcomes the "hard filtration" that causes the filtration equipment to be easily blocked, the filtration is not smooth, the filtration efficiency is low, and the investment and operation costs High disadvantages, the system provided by the present invention has high water and sand separation efficiency, small footprint, extremely low investment and operating costs, safe use, simple maintenance, and green and environmentally friendly sand filtration system facilities.

The present invention solves its technical problem and adopts following technical scheme to realize:

The present invention provides a micro-pressure flushing sand filtration system facility, including a sand chamber, an overflow storage pool, an inner filter pool, and an outer filter pool. The inlet channel is connected to the sand chamber, and a lateral The overflow weir leads to the overflow storage tank. The upper end of the other side wall at the tail of the grit chamber connects the grit chamber and the filter inner tank through the water inlet pipe and the attached valve. The end of the filter inner tank and the filter outer pool pass through the pipe and the attached valve valve connection.

There is a water inlet sluice at the right side of the grit chamber. There is a certain vertical slope at the bottom of the grit chamber. There is a steady flow plate in front of the water inlet. A flush gate is set at the end of the grit chamber for sand discharge. There is a partition wall.

The filtering inner pool includes the inner pool filter net and the bracket, and the bracket is fixed on the bottom of the filtering inner pool by bolts, and the inner pool filter net is laid obliquely on the bracket along the water flow direction.

The filter outer pool includes a bracket, an outer pool filter screen and a water-permeable plate are arranged inside, the bracket is fixed on the bottom of the filter outer pool, the water-permeable plate is installed on both sides of the bracket in an open shape, and the outer pool filter screen is fixed in the middle of the water-permeable plate.

In the present invention, the water head from the free liquid surface of the grit chamber to the central line of the connecting pipe between the grit chamber and the filter inner pond is controlled within 20-100cm.

In the present invention, the distance between the central line of the connecting pipe between the grit chamber and the filter inner pond and the bottom of the grit chamber is controlled between 50-60cm.

In the present invention, the sediment deposition thickness at the bottom of the grit chamber is controlled between 30-40cm.

In the present invention, water outlet pipes are connected below the tails of the filtering inner pool and the filtering outer pool, and water meters are provided at the water outlets.

In the present invention, the water inlet gate of the grit chamber is provided with two gates for controlling the water inlet flow.

In the present invention, a number of drainage holes are evenly arranged on the steady flow plate for stabilizing the water flow.

In the present invention, the cross-section of the filter pool box is rectangular or trapezoidal.

In the present invention, the partition wall is 50cm high and 15cm wide.

In the present invention, the height of the overflow weir is 5-15 cm lower than the top of the grit chamber.

In the present invention, the apertures of the outer pool filter and the inner pool filter should be less than 0.015cm.

In the present invention, the vertical slope from the right side to the left side of the bottom of the grit chamber is 1/50-1/100.

In this field, in farmland water conservancy irrigation, the "hard filter" method is often used to treat the sediment in the surface water, that is, the filter facilities use fixed hard filter materials, and the muddy water containing sediment passes through the fixed hard filter equipment. Filtering is done.

The method of "soft filtration" is adopted in the present invention, that is, the filtering facilities adopt soft filtering materials, such as soft materials such as nylon mesh, nylon mesh, and soft stainless steel mesh. When the surface water containing sediment passes through the "soft filter" facility, under the action of micro-head, the sediment will continuously roll and move in the filter screen, and the filter screen will also change its shape continuously, so that the filter screen is not easy to be blocked, the filtration efficiency is improved, and the solution And it overcomes the problems of easy blockage of filter outlets and low filtration efficiency in the "hard filter" method.

In farmland water conservancy irrigation, the surface water containing sediment is treated by traditionally using water pumps and electric power facilities to pump the surface water containing sediment into the filtration facilities and equipment under the control of electric power under strong pressure. The present invention adopts a micro-pressure flushing sand filtration system, and combines the self-weight principle of surface water with the comprehensive design of the water head to provide a micro-pressure flushing sand filtration system. The water head is well known in the field, that is, the free liquid of the sand chamber From the surface to the height of the center line of the connecting pipe between the grit chamber and the filter inner tank, using the principle of water self-weight, abandoning the traditionally used water pumps and power facilities, and matching with the adopted "soft filtration" facilities, comprehensively solve the traditional problems. Under the action of the water pump, the surface water containing sediment enters the fixed hard filter material for filtration at a relatively high pressure, which can easily lead to blockage of the filter network points of the hard filter material, low filtration efficiency and high operating costs.

Further, the present invention provides the application of the micro-pressure flushing sand sediment filtration system facility in agricultural water conservancy and irrigation operations. The combination of micro-pressure flushing sand settling and "soft filtration" is used to treat surface water containing sediment. The whole system abandons traditional water pumps and power facilities and equipment, and uses the combination of the self-weight principle of surface water and the comprehensive design of water head to provide a A micro-pressure flushing sand filtration system, which overcomes the disadvantages of easy blockage of filter equipment caused by "hard filtration", poor filtration, low filtration efficiency, and high investment and operating costs. High separation efficiency, small footprint, extremely low input and operating costs, safe use, simple maintenance, green environmental protection sand filtration system facilities.

When using the present invention to provide the micro-pressure flushing type sedimentation filter system facility, first open the inlet gate of the sedimentation tank, after the water containing sediment passes through the steady flow plate, the large particle sediment is deposited on the bottom of the sedimentation tank, After preliminary sedimentation in the sand tank, the water flow enters the filter inner tank for filtration. After filtering through the inner tank filter, the water containing dirt enters the filter outer tank for re-filtering, and finally is discharged through the outlet pipe. When the water level in the sand settling tank is high, some The water flows through the overflow weir to the overflow storage tank.

When the grit chamber reaches the designed thickness of the sediment layer, lift the steady flow plate, alternately close the inlet gates on both sides of the grit chamber, and alternately open the flushing gates corresponding to the other side of the grit chamber to discharge the sand and discharge the air. In the sand discharge stage, the silted and dense sediment in the pool is carried out of the pool by the water flow. After most of the outer pool filter screen in the filter outer pool is blocked, it needs to be taken out to remove the floating matter and plankton in the filter screen, and then put it into the filter outer pool.

The beneficial effect that the present invention reaches:

The invention provides a kind of micro-pressure flushing sand filtration system facility, which uses the combination of micro-pressure flushing sand sedimentation and "soft filtration" to treat sediment-containing surface water. Combining the self-weight principle of surface water and the comprehensive design of the water head, a micro-pressure flushing sand filtration system is provided. This system overcomes the "hard filtration" that causes the filtration equipment to be easily blocked, the filtration is not smooth, and the filtration efficiency is low. And the drawbacks of high operating costs, the use of the system provided by the present invention has high water and sand separation efficiency, small footprint, extremely low investment and operating costs, safe use, simple maintenance, and green and environmentally friendly sand filtration system facilities to provide suitable for field irrigation. The clean water source has a wide range of practicability in the field of agricultural water conservancy irrigation, and has application and promotion value.

Description of drawings

Figure 1 shows a schematic diagram of the overall structure provided for the present invention.

Fig. 2 shows the A-A sectional view of the internal structure of the grit chamber of the present invention.

Fig. 3 shows the B-B sectional view of the grit chamber structure of the present invention.

Fig. 4 shows a C-C sectional view of the filter inner pool structure of the present invention.

Fig. 5 is a D-D sectional view of the filter outer pool structure of the present invention.

Fig. 6 is a front sectional view of the bracket structure of the present invention.

Fig. 7 is a left view structural schematic diagram of the bracket structure of the present invention.

FIG. 8 is a schematic top view of the bracket structure of the present invention.

Fig. 9 shows a schematic diagram of the water head (H) of the present invention.

In Figure 1-9: 1-settling tank, 2-stabilizing plate, 3-overflow storage tank, 4-overflow weir, 5-partition wall, 6-filter inner pool, 7-bracket, 8- Inner pool filter, 9-outer pool filter, 10-filter outer pool, 11-inlet pipe, 12-outlet pipe, 13-sand flushing gate, 14-bracket, 15-permeable plate, 16-inlet gate, H-indicates sinking The height from the free liquid surface of the grit tank to the center line of the connecting pipe between the grit chamber and the filter inner tank, that is, the water head.

specific embodiment

The specific implementation of the present invention will be further described in detail below in conjunction with accompanying drawings 1 to 9 and the embodiments, but the device of the present invention is not limited to the following embodiments.

In the present invention, the relative positional relationship of each component in a micro-pressure flushing type settling filter system facility is described according to the layout of Figure 1, such as: up, down, left, right, head, tail, etc. The relationship is determined according to the layout direction of Figure 1, the head is generally the right end, and the tail is the left end.

Embodiment one:

Referring to accompanying drawing 1, a kind of micro-pressure flushing type sedimentation filtering system facility provided by the present invention comprises a sedimentation tank (1), an overflow storage tank (3), an inner filter pond (6), and an outer filter pond (10), The inlet channel connects the grit chamber (1), and the side overflow weir (4) is arranged on one side of the tail of the grit chamber (1) and leads to the overflow storage tank (3), and the other side wall of the tail of the grit chamber (1) Connect and filter the inner pool (6) by the inner pool water inlet pipe, filter the inner pool (6) and filter the outer pool (10) by pipelines and attached valves.

Referring to accompanying drawing 2,3, grit chamber (1) head is provided with grit chamber inlet gate (16), and grit chamber inlet gate (16) front is provided with stabilizing plate (2), grit chamber (1) end A sand flushing gate (13) is provided, and a partition wall (5) is provided along the flow direction in the center of the grit chamber (1).

Referring to accompanying drawing 4, filtering inner pool (6) comprises inner pool filter screen (8), bracket (7), and bracket (7) adopts bolt to be fixed on filter inner pool (6) pool bottom, and inner pool filter screen (8) ) obliquely spread on the bracket (7) along the water flow direction.

Referring to accompanying drawing 5, filtering outer pond (10) comprises bracket (14), outer pond filter screen (9), permeable plate (15), and support (14) adopts bolt to be fixed on the bottom of filter outer pond (10), permeable plate (15) It is installed on both sides of the bracket (14) in an opening shape, and the outer pool filter screen (9) is placed in the middle of the permeable plate (15).

In the present invention, a water outlet pipe (12) is connected below the tail of the filter inner pool (6) and the filter outer pool (10), and the water outlet is provided with a water meter.

In the present invention, some drainage holes are evenly arranged on the steady flow plate (2), which are used to reduce the water flow velocity behind the steady flow plate and play the role of stabilizing the water flow.

In the present invention, the cross-section of the filter pool box is rectangular or trapezoidal.

Referring to accompanying drawing 6,7 and 8, among the present invention, respectively fix two filter screens (8) separately in the bracket in the filter inner pool (6).

In the present invention, the apertures of the outer pool filter and the inner pool filter should be less than 0.015cm.

Among the present invention, the longitudinal slope from the right side to the left side of the bottom of the grit chamber (1) is 1/50-1/100.

Embodiment two:

In the micro-pressure flushing type sand filtration system facility provided according to embodiment one, the overflow weir (4) height is lower than the top 5cm of the sand chamber (1), and the height of the partition wall is set in the middle of the sand chamber (1) along the flow direction. 50cm, wide 15cm; The longitudinal slope from the right side to the left side is 1/100 at the bottom of the grit chamber (1); referring to accompanying drawing 9, connecting pipe between the grit chamber (1) and the filter inner pond (6) The distance of the center line of the grit chamber (1) from the free surface of the grit chamber (1), that is, the head H is 20cm, and the center line of the connecting pipe between the grit chamber (1) and the filter inner pond (6) is far from the grit chamber (1) The distance at the bottom is 50cm, and the sedimentation silt thickness at the bottom of the grit chamber (1) is 30cm.

Embodiment three:

In the micro-pressure flushing type sand filtering system facility provided according to embodiment one, the overflow weir (4) height is lower than the top 15cm of the sand chamber (1), and the height of the partition wall is set along the water flow direction in the middle of the sand chamber (1). 50cm, wide 15cm; The vertical slope from the right side to the left side is 1/50 at the bottom of the pond of grit chamber (1); Referring to accompanying drawing 9, connecting pipe between grit chamber (1) and filter inner pond (6) The center line of the grit chamber (1) is the distance from the free surface of the grit chamber (1), that is, the head H is 100cm, and the center line of the connecting pipe between the grit chamber (1) and the filter inner pond (6) is far from the grit chamber (1) The distance at the bottom is 60cm, and the thickness of silt deposited at the bottom of the grit chamber (1) is 40cm.

Embodiment four:

In the micro-pressure flushing type sand filtering system facility provided according to embodiment one, the overflow weir (4) height is lower than the top 10cm of the sand chamber (1), and the height of the partition wall is set along the water flow direction in the middle of the sand chamber (1). 50cm, wide 15cm; The vertical slope from the right side to the left side is 1/70 at the bottom of the pond of grit chamber (1); Referring to accompanying drawing 9, connecting pipe between grit chamber (1) and filter inner pond (6) The centerline of the grit chamber (1) is the distance from the free liquid surface of the grit chamber (1), that is, the water head H is 60cm, and the centerline of the connecting pipe between the grit chamber (1) and the filter inner pond (6) is far from the grit chamber (1) The distance at the bottom is 55cm, and the sedimentation silt thickness at the bottom of the grit chamber (1) is 35cm.

Embodiment five:

In the micro-pressure flushing type sand filtering system facility provided according to embodiment one, the overflow weir (4) height is lower than the top 8cm of the sand chamber (1), and the height of the partition wall is set along the water flow direction in the middle of the sand chamber (1). 50cm, wide 15cm; The vertical slope from the right side to the left side is 1/60 at the bottom of the pond of grit chamber (1); Referring to accompanying drawing 9, connecting pipe between grit chamber (1) and filter inner pond (6) The center line of the grit chamber (1) is the distance from the free surface of the grit chamber (1), that is, the water head H is 30cm, and the center line of the connecting pipe between the grit chamber (1) and the filter inner pond (6) is far from the grit chamber (1) The distance at the bottom is 57cm, and the thickness of silt deposited at the bottom of the grit chamber (1) is 37cm.

Embodiment six:

Referring to accompanying drawing 1, when applying a kind of micro-pressure flushing type settling filter system facility provided by the above-mentioned embodiment 1 to embodiment 5, first open the inlet gate (16) of the settling tank, and the water containing silt passes through the stabilizing plate ( 2) after, the large particle silt is deposited in the bottom of the grit chamber (1), after preliminary sedimentation in the grit chamber (1), the current enters the filter inner pond (6) to filter, and passes through the inner pond filter screen (8 ) after filtration, the water flow containing dirt enters the filter outer pool (10) to be filtered again, and finally discharged through the outlet pipe (12). In the overflow storage tank (3).

When the grit chamber (1) reaches the designed sediment layer thickness, lift the steady flow plate (2), alternately close the inlet gates (16) on both sides of the grit chamber (1), and alternately open the corresponding other side of the grit chamber ( 1) The flushing sluice (13) carries out emptying and sand discharging, and in the stage of emptying and sand discharging, the dense silt accumulated in the pool is carried out of the pool by the water flow. After most of the outer pool filter screen (9) in the filter outer pool (10) is blocked, it needs to be taken out, and the floating matter and plankton in the filter screen are removed, and then it is put into the filter outer pool (10).

The micro-pressure flushing sand filtration system facility provided by the above series of embodiments is a brand-new system facility that combines micro-pressure flushing sand sedimentation with "soft filtration". Water pumps and power facilities with high consumption and high operating costs overcome the disadvantages of "hard filtration" that cause easy blockage of filter equipment, poor filtration, low filtration efficiency, high investment and operating costs, and adopt the principle of water self-weight and water head The comprehensive design of the water and sand filtration system has invented a sand filtration system facility with high water and sand separation efficiency, small footprint, low investment and operating costs, safe use, simple maintenance, and environmental protection.

As mentioned above, the present invention can be better realized. The above-mentioned embodiment is only a description of the preferred implementation of the present invention, and does not limit the scope of the present invention. Various modifications and improvements made by technicians to the technical solution of the present invention shall fall within the scope of protection determined by the present invention.

Claims (10)

1. a kind of minute-pressure flushing type desilting filtration system facility, it is characterised in that system facility includes settling pit, overflow water storage Pond, the outer pond of filtering in pond, filtering, inlet channel are connected to settling pit, and settling pit afterbody side sets side overflow weir and leads to overflows Stream tank, settling pit afterbody opposite side sidewall upper is connected pond in settling pit and filtering by water inlet pipe and the valve set up Connect, filtering Nei Chi ends are connected with outer pond is filtered by pipeline and the valve set up；

Settling pit right-hand end is provided with intake gate, and intake gate front is provided with stabilier, and settling pit end is provided with scouring sluice, settling pit Middle setting have partition wall；The bottom of pond of settling pit from the longitudinal slope in right side to left side be 1/50-1/100；

Pond includes interior pond screen pack, bracket in filtering, and, using pond bottom of pond in filtering is bolted to, interior pond screen pack is along water for bracket Stream direction is tiltedly layered on bracket；

The outer pond of filtering includes that support, inside are provided with outer pond screen pack, porous disc, and support is fixed on the outer pond bottom of pond of filtering, porous disc It is opening-like installed in support both sides, outer pond screen pack is fixed in the middle of porous disc.

2. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described settling pit Free surface to settling pit and filtering between pond the head of connecting tube center line control between 20-100cm.

3. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described settling pit With in filtering between pond connecting tube center line from settling pit bottom distance controlling between 50-60cm.

4. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that in described filtering Pond and the outer pond afterbody lower section of filtering are respectively connected with outlet pipe, and delivery port is provided with water meter.

5. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described settling pit Intake gate is provided with twice gate.

6. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described stabilier On be uniformly arranged some osculums.

7. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described filtering ponds Pond railway carriage or compartment cross section rectangular and trapezoidal shapes.

8. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described partition wall wall 50cm high, wall 15cm wide.

9. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described downflow weir Highly less than settling pit top 5-15cm.

10. a kind of minute-pressure flushing type desilting filtration system facility as claimed in claim 1, it is characterised in that described outer pond Screen pack and interior pond screen pack aperture should be less than 0.015cm.