CN202105479U - Pressure type air-water mutually flushing filter pool - Google Patents

Abstract

The utility model discloses a pressure-type air-water mutual flushing filter, which comprises a pool body, a water inlet branch pipe, an air intake branch pipe, a first water main pipe, a second water main pipe and an on-off control device, and the pool body includes at least Two closed filter grids, each filter grid is equipped with a filter material layer, corresponding to each filter grid is respectively arranged with a first water outlet and a second water outlet; the water inlet branch pipe is connected with each first water outlet, used to introduce Filter water; the first water outlet of each filter grid is connected with the first water main pipe through the first branch pipe; the second water outlet of each filter grid is connected with the second water main pipe through the second branch pipe; each second branch pipe is provided with an air inlet , connected to each air inlet through the intake branch pipe; the on-off control device is used to respectively control the on-off of each water inlet branch pipe, each first branch pipe, each second branch pipe and the second water main pipe. The filter tank reduces the overall height of the tank body and reduces the occupied space of the filter tank.

Description

Pressure air-water mutual flushing filter

technical field

The utility model relates to water treatment technology, in particular to a pressure type air-water mutual washing filter tank.

Background technique

At present, the commonly used filtration facilities for domestic surface water treatment include siphon filters, mobile hood filters, V-shaped filters, fast filters, valveless filters, etc. All kinds of filters can effectively reduce suspended solids in water. Among them, the siphon filter, the mobile cover filter and the V-shaped filter are mainly used in large-scale water purification plants, and the installation of the filter requires a lot of space.

Fast filters and valveless filters are widely used in coal mine water surface treatment systems. Fast filters use a large resistance water distribution system, and special flushing equipment or facilities must be configured to ensure the backwashing effect of the filter. Valveless filters The hydraulic siphon recoil system is adopted, and the height of the filter body plus the height of the huge siphon is usually more than 6 meters.

Therefore, the setting of existing filtering facilities all needs to take up a large space.

Utility model content

The utility model provides a pressure type air-water mutual flushing filter tank to reduce the occupied space of the filter tank.

The pressure type air-water mutual flushing filter provided by the utility model includes:

A pool body, the pool body includes at least two airtight filter grids, each filter grid is provided with a filter material layer, and a first water outlet and a second water outlet are respectively arranged on each of the filter grids;

The water inlet branch pipe is connected with each of the first water outlets, and is used to introduce the water to be filtered;

The first water main pipe, the first water outlet of each filter grid communicates with the first water main pipe through the first branch pipe;

The second water main pipe, the second water outlet of each filter grid communicates with the second water main pipe through the second branch pipe;

Air intake branch pipes, each of the second branch pipes is provided with an air inlet, and is connected to each air inlet through the air intake branch pipe;

The on-off control device is used to separately control the on-off of each water inlet branch pipe, each first branch pipe, each second branch pipe, air intake branch pipe and the second water main pipe.

The above-mentioned pressure-type air-water mutual flushing filter, wherein, the on-off control device is an on-off control valve, which is respectively arranged on each water inlet branch pipe, each first branch pipe, each second branch pipe, each air intake branch pipe and In the second water main.

The pressure-type air-water mutual flushing filter tank described above is further provided with a water inlet main pipe, and each water inlet branch pipe is in communication with the water inlet main pipe.

The pressure-type air-water mutual flushing filter tank described above is further provided with an air intake main pipe, and each of the air intake branch pipes is connected with the air intake main pipe.

As mentioned above, the pressure type air-water flushes the filter tank mutually, wherein,

Each of the filter grids is of the same size;

The first water outlet of each filter grid is respectively arranged on the top of the filter grid;

The second water outlets of each filter grid are arranged on the same side of the pool body, and each second water outlet is correspondingly arranged near the bottom of the filter grid;

The first water main pipe is arranged at the top of the pool body, and the second water main pipe is arranged adjacent to the bottom of the pool body.

As mentioned above, the pressure type air-water flushes the filter tank mutually, wherein,

An inspection hole is provided on the side wall of each filter grid, through which the inside of the filter grid can be inspected;

A vent valve is provided on the side wall of each filter grid and adjacent to the bottom of the filter grid.

The pressure-type air-water mutual flushing filter tank described above, wherein each filter grid is also provided with a supporting layer, a filter plate and a long handle filter head from top to bottom;

Wherein, the filter material layer is arranged above the supporting layer, the edge of the filter plate is fixed on the side wall of the filter grid, and the long handle filter head is fixed on the filter plate.

The pressure-type air-water mutual flushing filter provided by the utility model can be used to filter the water to be filtered, and when backwashing a certain filter grid, the gas backwashing is carried out by pressure gas first. After flushing, water backwashing is carried out, and the backwashing water comes from the filtered water of other filter grids to realize the mutual flushing between the filter grids. space occupied by the filter.

Description of drawings

Fig. 1 is the structural representation of the pressure-type air-water mutual flushing filter tank provided by the utility model embodiment;

Fig. 2 is the structural representation of the pressure-type air-water mutual flushing filter provided by another embodiment of the utility model;

Fig. 3 is a schematic diagram of the internal structure of the filter lattice of the pressure-type air-water mutual flushing filter provided by the embodiment of the utility model.

Reference signs:

1-pool body; 2-filter grid; 3-first water outlet;

4-the second water outlet; 5-inlet branch pipe; 6-the first water main pipe;

7-the first branch pipe; 8-the second water main pipe; 9-the second branch pipe;

10-water inlet valve; 11-water outlet valve; 12-backwash drain valve;

13-Water outlet main valve; 14-Intake port; 15-Intake valve;

16-intake main pipe; 17-intake branch pipe; 18-water inlet main pipe;

19-manhole; 20-filter material layer; 21-supporting layer;

22-filter plate; 23-long handle filter head; 24-air water chamber;

25-Water distribution board.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The embodiment of the utility model provides a pressure-type air-water mutual flushing filter, which can be used in water supply treatment, waste water treatment and sewage treatment, including two stages of filtration and backwashing.

In the filtration stage, the water to be filtered enters the filter grid from top to bottom. After filtering in the filter grid, the suspended solids, colloids and other substances in the water are trapped in the filter material layer in the filter grid, and then the filtered water flows out from the filter grid. The filtered water can meet the requirements of production water.

The backwash stage is to clean the filter material layer of the filter grid to restore the filtering function of the filter material layer.

Fig. 1 is the structural representation of the pressure type air-water mutual flushing filter provided by the embodiment of the utility model, as shown in Fig. Water main pipe 8, intake branch pipe 17 and on-off control device.

The pool body 1 includes at least two filter grids 2 , each filter grid 2 is provided with a filter material layer, and a first water outlet 3 and a second water outlet 4 are respectively arranged on each filter grid 2 .

Each water inlet branch pipe 5 is connected with each first water outlet 3 for introducing the water to be filtered. The first water outlet 3 of each filter grid 2 is connected with the first water main pipe 6 through the first branch pipe 7, and the second water flow of each filter grid 2 The port 4 communicates with the second water main pipe 8 through the second branch pipe 9 , each second branch pipe 9 is provided with an air inlet 14 , and is connected with each air inlet 14 through the air inlet branch pipe 17 .

The on-off of each water inlet branch pipe 5 , each first branch pipe 7 , each second branch pipe 9 , each air intake branch pipe 17 and the second water main pipe 8 is respectively controlled by an on-off control device.

The pool body includes at least two closed filter grids. The size and number of the filter grids depend on the amount of water to be filtered and the size of the space where the filter grids are located. The volume or quantity of the filter grids can be increased to increase the amount of water to be filtered. The airtight filter grid is used It can ensure the pressure of the backwash water when the backwash water flows through the filter grid to ensure the backwash effect.

The distribution of the filter grids depends on the space where the filter grids are located. A certain volume of space can be separated to form multiple filter grids and set side by side, or multiple filter grids can be scattered and arranged in a certain space. The grids together form the pool body.

Each filter grid is equipped with a filter material layer, which is used to intercept and absorb suspended solids, colloids and other substances in the water to be filtered. The filter material layer is composed of a certain thickness of filter material for filtration, which can be used as the material type of filter material There are many, which can be natural quartz sand, anthracite grains, marble grains, magnetite grains, dolomite grains and granite grains.

The filtered water formed by filtering the water to be filtered through the convective filter grid through the filter material layer can be used as production water.

Among them, single-layer fine sand gradation or double-layer coal and sand gradation filter material layer are especially suitable for filtering coal mine water with coal dust as the main suspended matter. After filtering, it can meet the standard of underground production water.

For the selection of the filter material layer, the filter material to be used can be selected according to the requirements and grades of filtration, which is not limited to this embodiment.

Each of the above-mentioned water inlet branch pipes is used as a passage for the filtered water to flow into the filter grid to guide the filtered water to flow into the filter grid from top to bottom; each first branch pipe is used as a passage for the backwash water to flow out of the filter grid, and the first water main pipe is used as a channel for the water to flow out of the filter grid. The backwash water of the filter grid is introduced into the external passage.

Each second branch pipe is used as a passage for filtered water to flow out of the filter grid, and is connected with each intake branch pipe as a passage for guiding pressure gas. The branch pipe enters the filter grid.

The second water main pipe is used as a passage to introduce the filtered water flowing out of the filter grid to the outside world, and when backwashing a certain filter grid, the second water outlet main pipe can guide the filtered water of other filter grids to flow into the backwash water to be reversed. Rinse the filter grid. The on-off control device is used to control the on-off of each branch pipe and the water main pipe. Valves can be used as the on-off control device to control the conduction or disconnection of each branch pipe and the water main pipe by opening or disconnecting the valve. Water inlet valve 10 is set in water inlet branch pipe 5, backwash drain valve 12 is set in each first branch pipe 7, water outlet valve 11 is set in each second branch pipe 9, air intake valve 15 is set in each air intake branch pipe 17, A water outlet valve 13 is arranged in the second water main pipe 8 .

Pistons can also be set in each branch pipe and water main pipe, and the conduction or disconnection of each branch pipe and water main pipe can be controlled by moving the position of the piston. Of course, other devices can also be used, as long as the control of each branch pipe and water main pipe can be realized. That is, it is not limited to the form of this embodiment.

The following describes the working process of the pressure-type air-water mutual flushing filter provided in this embodiment.

When filtering through the pressure-type air-water mutual flushing filter, the water inlet branch pipe, the second branch pipe and the second water main pipe of each filter grid are connected sequentially or simultaneously, and the first branch pipes and the first water main pipe are disconnected. When the water to be filtered enters each filter grid from top to bottom through the water inlet branch pipes, it flows into the filter material layer. Suspended solids, colloids and other substances in the water to be filtered are trapped in the filter material layer and filtered through the filter material layer to form a filter layer. The rear water flows out of each filter grid through each second branch pipe and enters the second water main pipe, and is introduced into the outside world through the second water main pipe as production water.

The filter material layer in each filter grid has been working for a long time. With the increase of the substances in the water to be filtered intercepted by the filter material layer, the filtering effect of the filter material layer will be reduced and the filtering function will be affected. Therefore, in order to restore the filtration of the filter material layer Function, it is necessary to backwash the filter grid regularly, and restore the filtering function of the filter material layer in the filter grid through backwashing. When backwashing, the gas backwashing is first performed by pressure gas, and then the water backwashing is performed by water.

In practical application, usually one of the multiple filter grids is firstly backwashed with gas and then backwashed with water, while the other filter grids are still filtered normally. rinse.

When backwashing a certain filter grid, disconnect the water inlet branch pipe and the second branch pipe of the filter grid to be backwashed sequentially or at the same time, the first branch pipe and the intake branch pipe leading to the filter grid, and pass through the intake branch pipe. The pressure gas flows into the filter grid from bottom to top through the inlet branch pipe of the filter grid to be backwashed, and forms an impact airflow in the filter grid, and impacts the filter material layer in the filter grid through the impact air flow, and the filter grid is gas-charged. Backwash to make the material trapped by the filter material layer fall off from the filter material layer.

After the gas backwash is finished, carry out water backwash, disconnect the water inlet branch pipe and the second water main pipe of the filter grid to be backwashed sequentially or simultaneously, and connect the second branch pipe of the filter grid. At this time, the remaining filter grids are still running normally. filter, but the filtered water flowing out of the remaining filter grids will flow into the filter grid through the second water main pipe through the second branch pipe of the filter grid to be backwashed as backwash water, and flow through the filter grid to be backwashed from bottom to top. Then, it flows out of the filter grid through the first branch pipe of the filter grid and flows out to the outside through the first water main pipe, so as to realize the backwashing of the filter grid, flush away the substances intercepted by the filter material layer, and at the same time backwash the gas Finally, the separated substances are taken away, and the backwash water flows out of the filter grid. After the above backwash, the substances intercepted by the filter material layer are removed to restore the filter function of the filter material layer.

After the backwashing of one filter grid is completed, the above-mentioned backwashing process can be repeated to backwash the other filter grids in turn. After the backwashing of all the filter grids is completed, each filter grid resumes normal filtration.

It can be known from the above technical scheme that the pressure type air-water mutual flushing filter tank can be used to filter the water to be filtered, and when backwashing a certain filter cell, the gas backwashing is first performed by the pressure gas and then the water backwashing is performed, and The backwashing water comes from the filtered water of other filter grids to realize the mutual flushing between the filter grids. Since the filter material layer in the filter grid is firstly backwashed by the pressure gas, the impact airflow generated by the pressure gas will impact the filter during the rising process. The disturbing effect of the layer makes the impurities trapped in the filter material layer fall off from the filter material particles, and then backwashed by water, and the substances separated by gas backwashing can be taken away by the backwashing water, which can reduce the cost of separate water Flush strength of backwash. And the filter grid is a closed filter grid, which can ensure the pressure of the filter pressure and the pressure of the backwash water and the pressure of the backwash water. Therefore, the height of the filter tank is reduced on the basis of ensuring the filtration and backwash effect, and the filter tank is reduced. occupied space.

And because the backwashing water comes from the filtered water of other filter grids during water backwashing, it saves the flushing water pump or high-level flushing water tower and pipeline system required for water backwashing in other fast filters, and does not require gravity-free The huge flushing water tank on the upper part of the valve filter reduces the overall height of the tank.

On the basis of the above embodiments, further, the pressure type air-water mutual flushing filter tank is also provided with a water inlet main pipe, and each water inlet branch pipe is connected with the water inlet main pipe. In addition, an air intake main pipe can also be provided, and each air intake branch pipe is connected with the air intake main pipe.

Since the filter usually includes a plurality of water inlet branch pipes, it is necessary to pass into the water to be filtered through a plurality of nozzles of the plurality of water inlet branch pipes, and by setting the water inlet main pipe, each water inlet branch pipe is connected with the water inlet main pipe. Connected, pass the water to be filtered through the mouth of one end of the main water inlet pipe, and then lead the water to be filtered into each filter grid through each water inlet branch pipe, which is convenient for introducing the water to be filtered into the filter grid. Similarly, there can also be set The air intake main pipe, each air intake branch pipe is connected with the air intake main pipe.

On the basis of the above technical solutions, the technical solutions provided by the embodiments of the present invention will be described in detail below through preferred solutions.

Fig. 2 is a structural schematic diagram of a pressure-type air-water mutual flushing filter provided by another embodiment of the utility model. As shown in Fig. 2 , the pressure-type air-water mutual flushing filter includes a pool body 1, which consists of Each filter grid 2 has the same size, and each filter grid 2 is a closed filter grid 2 to ensure the pressure of the pressure gas when the pressure gas is passed into the filter grid 2.

The water inlet branch pipe 5 is connected with each first flow port 3, the first flow port 3 of each filter grid 2 is communicated with the first water main pipe 6 through the first branch pipe 7, and the second flow port 4 of each filter grid 2 is connected with the first water flow port 4 through the second branch pipe 9. The second running water main pipe 8 communicates, and each second branch pipe 9 is provided with an air inlet 14, which is connected with each air inlet 14 by an air inlet branch pipe 17 and each air inlet branch pipe 17 is connected with the air inlet main pipe 16, and each air inlet The branch pipe 17 is provided with an on-off control valve, and is provided with a water inlet main pipe 18 , and each water inlet branch pipe 5 communicates with the water inlet main pipe 18 .

The first water outlet 3 of each filter grid 2 is respectively arranged on the top of the filter grid 2, and the second water outlet 4 of each filter grid 2 is arranged on the same side of the pool body 1, and each second water outlet 4 is respectively arranged correspondingly Near the bottom of the filter grid 2; the first water main pipe 6 is arranged at the top of the pool body 1, and the second water main pipe 8 is arranged adjacent to the bottom of the pool body 1.

Set on-off control valves in each water inlet branch pipe, each first branch pipe, each second branch pipe, second water main pipe and each intake branch pipe, which can be manual valves, pneumatic valves, hydraulic valves, etc. Specifically, in each A water inlet valve 10 is arranged in the water inlet branch pipe 5, a backwash drain valve 12 is arranged in each first branch pipe 7, a water outlet valve 11 is arranged in each second branch pipe 9, and a water outlet master valve 13 is arranged in the second water main pipe 8, An intake valve 15 is provided in each intake branch pipe 17 .

Setting the first water outlet on the top of the filter grid is more conducive to making the water to be filtered flow into the filter grid from top to bottom through the water inlet branch pipes, and the second water outlets are respectively arranged at the bottom of the filter grid to make the water flowing out of the filter grid The filtered water flows out of the filter grid more easily, and the backwash water flows into the filter grid from bottom to top through the second flow port.

The first water main pipe is set on the top of the filter grid, which is more conducive to guiding the backwash water flowing out of the filter grid to the outside world, and the second water main pipe is set near the bottom, so as to guide the filtered water flowing out of the filter grid to flow out to the outside world , and it is beneficial to guide the backwash water to flow into the filter grid from bottom to top.

The following describes the working process of the pressure-type air-water mutual flushing filter provided by the embodiment of the preferred solution.

When the filter tank is performing normal filtration, open the water inlet valve in the water inlet branch pipe of each filter grid, the water outlet valve in the second branch pipe, the water outlet valve in the second water main pipe, and close the water inlet valve in each inlet branch pipe sequentially or simultaneously. At this time, the water to be filtered flows into the water inlet branch pipes of each filter grid through the water inlet main pipe, and then flows into the filter grid from top to bottom, and passes through the filter material layer The water to be filtered is filtered, then flows out of the filter grid through the second branch pipe, and flows out to the outside through the second water main pipe, and the filtered water can be reused as production water.

When a filter grid needs to be backwashed, the gas backwashing is carried out by pressure gas first, and then the water backwashing is carried out.

Close the water inlet valve in the water inlet branch pipe and the water outlet valve in the second branch pipe of the filter grid to be backwashed sequentially or at the same time, open the backwash drain valve in the first branch pipe of the filter grid and the intake valve in the inlet branch pipe , the pressure gas is introduced through the intake main pipe, and the pressure gas flows into the filter grid from bottom to top through the intake branch pipe of the filter grid to be backwashed, and forms an impact airflow in the filter grid, and impacts the filter material layer in the filter grid through the impact airflow , so that the substances intercepted by the filter material layer fall off from the filter material layer, and perform gas backwashing on the filter grid.

After the gas backwashing is over, close the air intake valve in the inlet branch pipe of the filter grid after the gas backwashing, open the water outlet valve in the second branch pipe of the filter grid, and close the main water outlet valve. At this time, the filtered water flowing out of the remaining filter grids Water, as backwash water, enters the filter grid reversely from bottom to top through the second water main pipe, and flows through the filter material layer, flushing away the substances intercepted by the filter material layer, and can also remove the separated substances after being backwashed by the gas. Take it away, the backwash water flows out of the filter grid through the first branch pipe, and then flows out to the outside through the first water main pipe to complete the water backwashing of the filter grid.

After the above-mentioned gas backwashing and water backwashing processes, the substances trapped by the filter material layer are removed to restore the filtering function.

In order to facilitate the maintenance of the inside of the filter grid, on the basis of the above-mentioned embodiments, further, each filter grid is provided with an inspection hole 19 on the side wall, and the inside of the filter grid 2 can be inspected through the inspection hole 19 .

Moreover, a vent valve is provided on the side wall of each filter grid and adjacent to the bottom of the filter grid.

When it is necessary to overhaul the inside of the filter grid, close all the inlet valves, outlet valves, backwash drain valves, and air intake valves of the filter grid to be repaired, and then open the vent valve at the bottom of the filter grid to drain the water in the filter grid. After emptying, maintenance personnel enter the filter grid through the inspection hole for maintenance.

The pressure-type air-water mutual flushing filter provided by the embodiment of the utility model is usually used in water supply treatment, waste water treatment or sewage treatment. The inside of the filter grid is mainly provided with a filter material layer to filter the water to be filtered, as shown in Figure 3 The internal structural diagram of the filter lattice of the pressure-type air-water mutual flushing filter provided by the embodiment of the utility model is shown in Figure 3. In the pressure-type air-water mutual flushing filter, filter lattice 2 is arranged from top to bottom. Material layer 20, supporting layer 21, filter plate 22 and long handle filter head 23, filter material layer 20 is arranged on the top of supporting layer 21, filter plate 22 edge is fixed on the side wall of filter lattice 2, long handle filter head 23 It is fixed on the filter plate 22, and a supporting layer 21 is arranged above the filter plate 22.

The filter plate 22 plays the role of fixing the long-handle filter head 23 and carrying the filter material layer 20. The support layer 21 is arranged on the filter plate 22, and the filter material layer 20 is arranged above the support layer 21. The support layer 21 is usually a filter material. The gravel layer laid under the layer is used to prevent the loss of filter material when filtering the water to be filtered, and it can play a certain role in evenly distributing water when backwashing the filter grid.

The space formed by the lower end surface of the filter plate 22 and the wall surface of the filter grid 2 constitutes the air-water chamber 24, and the long-handle filter head 23 is fixed on the filter plate 22 as a backwashing device, and the filter grid 2 is backwashed with gas and water. At this time, the pressure gas or backwash water first enters the air-water chamber 24, and enters the filter material layer 20 after passing through the long-handle filter head 23, so that the pressure gas or backwash water after passing through the long-handle filter head 23 is evenly distributed, effectively flushing The material intercepted by the filter material layer 20 can be released, so that the filter material layer 20 can restore the filtering function, and can make there is no dead water corner area between the filter plates, and no mud accumulation. The long-handle filter head is mainly used for gas backwashing or air-water backwashing The pressure-type air and water flush each other in the filter tank.

In order to reduce the siphon force in the second water main pipe, the water outlet height of the second water main pipe 8 should be higher than the upper surface of the filter material layer 20 .

In order to make the water to be filtered flowing into the filter grid 2 through the water inlet branch pipe 5 pass through the filter material layer 20 more evenly, a water distribution plate 25 can be fixed at the outlet of the filtered water of the water inlet branch pipe 5 of each filter grid 2 .

The water distribution plate is a flat plate with water inlet holes evenly distributed on it. When the water to be filtered passes through the nozzle of the water inlet pipe and then passes through the water inlet holes uniformly distributed on the water distribution plate, the water to be filtered will pass through the filter material layer evenly to avoid the water to be filtered. The water passes through the mouth of the water inlet branch pipe and scours a certain position of the filter material layer concentratedly, thereby destroying the filter material layer.

In the pressure type air-water flushing filter tank provided by the embodiment of the utility model, the height of each filter grid is generally no more than 3 meters. The flushing intensity relation is:

In the above-mentioned formulas (1) and (2), among them, v _normal means the normal filtration rate, the unit is m/h, v _forced means the forced filtration speed, the unit is m/h, n means the number of filter grids, q means water reverse Washing intensity, unit is L/(m ² ·s).

According to formulas (1) and (2), when the pressure-type air-water mutual flushing filter is used to remove general suspended solids, the number of filter grids can be set to 4, and when the normal filtration rate is 7.2-9m/h, the forced filtration The speed is 9.6~12m/h, and the water backwash intensity is 8~10L/(m ² s) when the gas backwash is performed first and then the water backwash; when the filter is used for groundwater iron removal, the filter grid can be set as 5. When the normal filtration rate is 6m/h, the mandatory filtration rate is 7.5m/h, and the water backwash intensity is 8.3L/(m ² ·s) when the gas backwash is performed first and then the water backwash is performed.

The external air source is used as the pressure gas during gas backwashing, the gas backwashing intensity is 15-20L/(m ² s), and the flushing time is 3-1min. The sum of the filtered water volume of the remaining filter grids. When the filter tank is composed of 4 filter grids, the water backwashing intensity is 8-10L/(m ² ·s), and the water backwashing time is 6-5min. When the filter tank is composed of 5 filter grids, the water backwash intensity is 8.3L/(m ² ·s), and the water backwash time is 6-5min.

To sum up, the pressure-type air-water mutual flushing filter provided by the utility model adopts gas backwashing first, then water backwashing, and adopts a closed filter grid, which reduces the filtration rate on the basis of ensuring the filtering and backwashing effects. The height of the pool reduces the space occupied by the filter. Moreover, the filter tank can reduce the flushing intensity of backwashing alone, ensure the effect of backwashing, improve the efficiency of backwashing, avoid hardening of the filter material in the filter material layer, and save the amount of water required for backwashing.

Mutual backwashing between the filter grids eliminates the need for backwashing pumps, water towers or high-level pools and flushing pipes required for conventional backwashing. Low, thus saving the engineering cost.

Moreover, the internal and external structure of the filter is simple, so the maintenance workload is small, and it is especially suitable for places with medium and medium processing scales and small spaces. Since the coal mine underground roadway is usually 5 meters wide and 4 meters high, the pressure The air-water mutual flushing filter is especially suitable for the cross-section size and working environment of the coal mine underground roadway, and is used to filter the mine water of the coal mine as the underground production water.

The pressure-type air-water mutual flushing filter can be used when the water treatment volume of a single filter tank is 400m ³ ~8000m ³ /d, and multiple sets of filters can be used in parallel operation when the water volume is large.

The embodiment of the utility model also provides a filtering method, using the pressure-type air-water mutual flushing filter provided by the embodiment of the utility model, when filtering the water to be filtered, it includes:

Connect each water inlet branch pipe by operating the on-off control device in each water inlet branch pipe;

Conducting each second branch pipe by operating the on-off control device in each second branch pipe;

Conducting the second water main pipe by operating the on-off control device in the second water main pipe;

Each first branch pipe is disconnected by operating the on-off control device in each first branch pipe.

After the above-mentioned method is used to filter the filtered water, the filtered water can meet the requirements of production water.

In order to restore the filtering function of the filter material layer, it is necessary to regularly backwash the filter grid, and restore the filtering function of the filter material layer in the filter grid by backwashing. Therefore, on the basis of the above-mentioned embodiments, further, in this filtering method, when Water backwashing of the filter grid to be backwashed includes:

disconnecting the second water main by operating the on-off control device in the second water main;

Disconnect the water inlet branch pipe by operating the on-off control device in the water inlet branch pipe corresponding to the filter grid to be backwashed;

The first branch pipe and the second branch pipe are connected by operating the on-off control device corresponding to the first branch pipe and the second branch pipe of the filter grid to be backwashed.

In order to improve the efficiency of backwashing the filter material layer in the filter grid and ensure the effect of backwashing, before water backwashing, the filter grid is firstly backwashed with pressure gas. In this filtration method, the Gas backwashing includes:

Disconnect the water inlet branch pipe by operating the on-off control device in the water inlet branch pipe corresponding to the filter grid to be backwashed;

By operating the on-off control device in the intake branch pipe, the first branch pipe and the second branch pipe corresponding to the filter grid to be backwashed, the intake branch pipe, the first branch pipe and the second branch pipe are connected;

The second water main is disconnected by operating the on-off control device in the second water main.

The filtration method provided by the embodiment of the utility model adopts the pressure-type air-water mutual flushing filter tank provided by the embodiment of the utility model, which can filter the water to be filtered and backwash the filter material layer in the filter lattice, firstly through the pressure gas Gas backwashing is followed by water backwashing, and the backwashing water comes from the filtered water of other filter grids, which realizes the mutual flushing between the filter grids, improves the efficiency of backwashing while ensuring the backwashing effect, and avoids the filter layer The medium filter material is hardened, and at the same time saves the water required for backwashing. Adopting this filtering method can reduce the height of the filter tank and reduce the occupied space of the filter tank.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (7)

1. a pressure type air water washes the filter tank each other, it is characterized in that, comprising:

Pond body, said pond body comprise at least two airtight filter lattice, are provided with filter material layer in each said filter lattice, are furnished with the first-class mouth of a river and the second flowing water mouth respectively on corresponding each said filter lattice;

The water inlet arm links to each other with each said first-class mouth of a river, is used to import water to be filtered;

First-class supply mains, each first-class mouth of a river of filtering lattice is communicated with said first-class supply mains through first arm;

The second flowing water house steward, each second flowing water mouth of filtering lattice is communicated with the said second flowing water house steward through second arm;

Air intake branch offers air inlet on said each second arm, links to each other with each air inlet through said air intake branch;

The break-make control device is used for controlling respectively the arm of respectively intaking, each first arm, each second arm, each air intake branch and the second flowing water house steward's break-make.

2. pressure type air water according to claim 1 washes the filter tank each other, it is characterized in that:

Said break-make control device is an on-off control valve, is separately positioned among the arm of respectively intaking, each first arm, each second arm, each air intake branch and the second flowing water house steward.

3. pressure type air water according to claim 1 and 2 washes the filter tank each other, it is characterized in that: also be provided with water inlet manifold, each arm of intaking all is communicated with said water inlet manifold.

4. pressure type air water according to claim 1 and 2 washes the filter tank each other, it is characterized in that: also be provided with the inlet manifold, said each air intake branch all links to each other with said inlet manifold.

5. pressure type air water according to claim 1 and 2 washes the filter tank each other, it is characterized in that:

Each said filter lattice size is identical;

The corresponding respectively top that is arranged at said filter lattice, the first-class mouth of a river of each said filter lattice;

The second flowing water mouth of each said filter lattice all is arranged at body the same side, said pond, and each second flowing water mouth is corresponding respectively is arranged at the near said filter lattice;

First-class supply mains is arranged at place, body top, said pond, and the second flowing water house steward is adjacent to body bottom, said pond and is provided with.

6. pressure type air water according to claim 1 and 2 washes the filter tank each other, it is characterized in that:

Be provided with manhole on the sidewall of each said filter lattice, said filter lattice inside overhauled through said manhole;

On the sidewall of each said filter lattice and contiguous filter lattice bottom position be provided with atmospheric valve.

7. pressure type air water according to claim 1 and 2 washes the filter tank each other, it is characterized in that:

Each said filter lattice also is provided with supporting layer, filter plate and strainer head from top to bottom;

Wherein, said filter material layer is arranged at said supporting layer top, and said filter plate edge is fixed on the sidewall of said filter lattice, and said strainer head is fixed on the said filter plate.

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