CN105540821B - A kind of slow filter processing system of hybrid biology of stop-off - Google Patents

Abstract

The invention discloses an intermittent biological sand filter treatment system, which belongs to the field of biological purification treatment of slightly polluted water sources. The system includes: the water storage container communicates with the upper water inlet tank through a pipeline equipped with a water pump, a water level control gauge is installed in the upper water inlet tank, and the water outlet of the upper water inlet tank is connected to the oxygen increasing unit through a pipeline with a flow meter. The aeration unit is equipped with a splash plate, and the aeration unit is connected to the water inlet at the upper end of the sand-filling hybrid slow biological filter device through the flange, and the lower end of the sand-filling hybrid biological slow filter device is provided with a drain, and the drain is connected to clean water through the drain pipe tank; the water supply automatic control device is electrically connected with the water pump and the water level control gauge, and can control the start and stop of the water pump according to the signal of the water level control gauge, and replenish water to the upper water inlet tank. Because the treatment system adopts the sand filling hybrid biological slow filter device, the number of sand filling times can be 3 to 5 times per year, and the treatment efficiency can be improved by using the biological flora, and the surface layer of the filter material can be shoveled off the surface of the filter material for multiple additions of clean filter. The maintenance of materials prolongs the maintenance period.

Description

A kind of sand filling hybrid biological slow filter treatment system

technical field

The invention relates to the field of biological purification treatment of slightly polluted water sources such as rainwater or natural water, in particular to a sand-filling hybrid biological slow filtration treatment system.

Background technique

At present, in the vast arid areas and remote mountainous areas of our country, rainwater, mountain spring water, surface water, etc. will be used as domestic drinking water sources. The slightly polluted water is injected into the centralized water supply pool, and then distributed to various water cellars through pipelines, and the water is taken by households for use. For crop irrigation, livestock and people drinking.

Slightly polluted water has a long service life and even needs to be stored for several months. The water is usually boiled and then drunk. Living standards are not improved.

Biological slow filtration technology has broad application prospects in arid areas and remote mountainous areas due to its advantages of low equipment cost, easy operation, and low operating cost. However, the biological slow filtration technology has a short operating period (2-5 months) and frequent maintenance. It is necessary to stop the water filtration, scrape off the surface layer of the filter material by 10-30mm, and then backfill the clean filter material. After the water flow is restored, it takes 4-7 days to restore the water. The water quality is up to standard, the maintenance operation is complicated, the shutdown is required, and the water quality recovery period is long, which restricts the practical application of biological slow filtration technology.

Contents of the invention

Based on the problems existing in the above-mentioned prior art, the present invention provides a sand-replenishing hybrid biological slow filtration treatment system, which can solve the problems of short operation period and frequent maintenance and maintenance operations in the traditional biological slow filtration technology currently used to purify slightly polluted water. Complicated and require downtime to interrupt water filtration and other issues.

In order to solve the above technical problems, the present invention provides a sand filling hybrid biological slow filtration system, comprising:

Water storage container, upper water inlet tank, oxygenation unit, sand supplement mixed type biological slow filter device, clean water tank, water pump, water level control meter, flow meter and water replenishment automatic control device; among them,

The water storage container communicates with the upper water inlet tank through a pipeline provided with a water pump, and a water level control gauge is installed in the upper water inlet tank, and the water outlet of the upper water inlet tank communicates with the upper water inlet tank through a pipeline equipped with a flow meter. The aeration unit is connected, the aeration unit is provided with a splash plate, and the aeration unit is connected with the sand-filling hybrid slow biological filter device through a flange, and the sand-filling hybrid biological slow filter device The water outlet is connected to the clean water tank through the drain pipe;

The water replenishment automatic control device is electrically connected with the water pump and the water level control gauge, and can control the start or stop of the water pump according to the signal of the water level control gauge, and replenish water to the upper water inlet tank.

The beneficial effect of the present invention is: by adopting the upper water inlet tank provided with the water level control gauge inside it, it is connected with the sand filling mixed type biological slow filter device through the pipeline provided with the water pump, so that the water level control gauge can be utilized through the automatic water replenishment control device. The signal control water pump realizes the automatic replenishment of raw water to the upper water inlet tank, so that the system can run continuously and automatically without being on duty; and due to the sand filling hybrid biological slow filter device, it can be used without stopping after each operation cycle , by adding clean filter material and mixing it with the original filter material, the normal filtering state can be restored, which is not only more convenient to use and maintain, but also can make full use of the biological flora in the sand-filling hybrid biological slow filter device, effectively improving the protection of cellar water The processing efficiency can be increased by about 10%, and the maintenance period of the whole system is also extended.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural diagram of a sand filling mixed type biological slow filtration treatment system provided by an embodiment of the present invention.

Detailed ways

The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, the embodiment of the present invention provides a sand-filling hybrid biological slow filtration treatment system, which can extend the maintenance period and improve the treatment efficiency of cellar water, including:

Water storage container 15, upper water inlet tank 13, oxygenation unit 3, sand supplement mixed type biological slow filter device 10, clean water tank 8, water pump 9, water level control meter 1, flow meter 12 and water replenishment automatic control device 14;

Wherein, the water storage container 15 (water cellar or water tank can be used) communicates with the upper water inlet tank 13 through a pipeline provided with a water pump 9, and the water outlet of the upper water inlet tank 13 communicates with the oxygenation unit through a pipeline provided with a flow meter 12 3 connection, the aeration unit 3 is equipped with a splash plate 11, and the aeration unit 3 is provided with an overflow port 2; the aeration unit 3 is connected to the sand-filling hybrid biological slow filter device 10 through the flange 4, and the sand-filling hybrid type The lower end of the biological slow filter device 10 is provided with a drain, and the drain is connected to the clear water pool 8 through the drain pipe 7;

The replenishment automatic control device 14 is electrically connected with the water pump and the water level control meter 1 and the water pump 9, and the start and stop of the water pump is controlled by the signal of the water level control meter to replenish water for the upper water tank 13. Water replenishment automatic control device 14 can adopt conventional electronic control device or programmable controller etc.

In the above-mentioned processing system, the sand-filling mixed type biological slow filter device 10 adopts a sand-filling mixed type biological slow filter tank or is a sand-filling mixed type biological slow filter column, which is provided with a fine sand layer 5, a gravel layer from top to bottom. 6 composed of filter material; wherein, the thickness of the fine sand layer 5 is 600-900mm, the thickness of the gravel layer 6 is 100-200mm, the fine sand particle size of the fine sand layer 5 is 0.25-0.5mm, and the gravel particle size of the gravel layer 5 is 15-25mm.

In the above treatment system, the filtration rate of the sand replenishment hybrid biological slow filter device 10 is 0.1-0.3m/h, and the frequency of sand replenishment is designed to be 3-5 times per year according to the water quality of the influent, and maintenance is performed once a year.

In the above treatment system, the splash plate 11 provided in the oxygenation unit 3 is located above the liquid surface in the oxygenation unit 3, 100mm away from the top of the oxygenation unit 3, and is located at the water inlet of the oxygenation unit 3 and the sand filling mixed type. Between the filter material layers of the biological slow filter device 10, the splash plate 11 set in this way can make the water flow in the upper water inlet tank 13 enter the aeration unit 3 and hit the splash plate 11, increase the contact area between water and air, and improve Influent oxygen content. The aeration unit 3 is provided with an overflow port that is convenient for overflowing after it is full.

In the above treatment system, the sand replenishment hybrid biological slow filter device 10 has 3 to 5 sand replenishment cycles per year; the sand replenishment method for each sand replenishment cycle is: add 20 to 40 mm of clean filter material directly in the running state, And the supplementary filter material is mixed evenly with the 10-30mm thick filter material on the surface of the original filter material, and the recovery period for the effluent to meet the standard water quality is 2-5 days.

In the above processing system, the sand filling hybrid slow biological filter device 10 is operated for 3 to 5 sand filling cycles and is a maintenance period, and the maintenance method of each maintenance period is: shovel the sand filling hybrid biological slow filter device 10 The surface layer of the inner filter material is added to the filter material several times during each sand filling cycle between this maintenance period and the last maintenance period, and the clean filter material with a thickness of 10-30mm is added, and it will run normally after a recovery period of 4-7 days.

In the above treatment system, the sand-filling hybrid biological slow filter device 10 adopts a transparent shell made of transparent materials, which is conducive to sunlight penetration.

When the treatment system of the present invention is working, the raw water in the water storage container enters the upper water inlet tank through the control of the water replenishment automatic control device, and after the raw water flows through the sand replenishment hybrid biological slow filter device to form a biolayer normally, it will run stably for 2 to 4 After one month, the resistance of the system increases and the water output decreases. Directly add 20-40mm thick clean filter material under the running state, and mix the supplemented filter material evenly with the 10-30mm thick surface layer of the original filter material to make full use of it. The original biological flora in the sand replenishment hybrid biological slow filter device is accelerated to form a biological layer on the surface of the filter layer, and the water quality of the effluent is restored to the standard. The recovery period is 2 to 5 days. This is a sand replenishment cycle. The sand replenishment hybrid biological slow filter The filter treatment system has increased the treatment efficiency of cellar water by about 10%. The sand filling hybrid biological slow filter device has 3 to 5 sand filling cycles per year, that is, the number of sand filling times is 3 to 5 times. Then do a maintenance, shovel off the surface of the filter material and add the amount of filter material several times, add clean filter material with a thickness of 10-30mm, and run normally after a recovery period of 4-7 days, which is a complete operation cycle. And then go round and round. The sand replenishment and maintenance cycle of the sand replenishment hybrid biological slow filter device is the sand replenishment and maintenance cycle of the treatment system, which makes the sand replenishment hybrid biological slow filter treatment system of the present invention shorten the process compared with the traditional biological slow filter device. The recovery period has been shortened and the maintenance period has been extended.

The processing system of the present invention will be further described below in conjunction with specific embodiments.

The preferred embodiment of the sand filling hybrid biological slow filter treatment system of the present invention includes:

Water cellar (or water tank) as water storage container 15, top water inlet tank 13, aeration unit 3, sand filling mixed type biological slow filter device 10 (what adopted in the present embodiment is sand filling mixed type biological slow filter tank) , clean water tank 8, water pump 9, water level controller 1 and replenishment automatic control device 14; Wherein, water storage container 15 is connected with upper water inlet tank 13 by the pipeline that is provided with water pump 9, and the water outlet of upper water inlet tank 13 is provided with flow rate The pipeline of meter 12 is connected with the oxygenation unit 3, and the oxygenation unit 3 is provided with a splash plate 11, and the oxygenation unit 3 is connected with the sand filling mixed type biological slow filter device 10 through the flange, and enters the raw water impacting the oxygenation unit 3. After the splash plate 11 is oxygenated, it flows into the sand-replenishing hybrid biological slow filter device 10. The bottom of the sand-replenishing hybrid biological slow filter device 10 is provided with a drain outlet, which is connected to the clean water tank 8 through the drain pipe 7, and stored in the clean water tank 8. After filtering the clear water, the replenishment automatic control device 14 is electrically connected with the water pump 9 and the water level control meter 1, and can control the start and stop of the water pump 9 according to the signal of the water level control meter 1, and automatically replenishes water to the upper water inlet tank 13, and the water replenishment automatic control device 14 and the water pump 9. The synergistic effect of the water level controller 1 realizes automatic water replenishment according to the water level in the upper water inlet tank 13 .

The filter material in the sand-replenishing hybrid biological slow filter device is composed of a fine sand layer 5 with a thickness of 600-900 mm and a gravel layer 6 with a thickness of 100-200 mm from top to bottom. The fine sand particle size of the fine sand layer 5 is 0.25 ~0.5mm, the gravel particle size of the gravel layer 5 is 15-25mm. An overflow port 2 is set at 50 mm from the top of the aeration unit 3 to facilitate overflow. The upper opening of the aeration unit 3 and the sand-filling hybrid slow biological filter device 10 is connected by a flange 4, which can be easily and quickly disassembled and assembled, and the two units can be separated, so that the mixing of the new filter material and the original biological layer will not be affected. operate.

The shell of the sand filling hybrid slow biological filter device 10 in the above treatment system is made of transparent material, which is a transparent shell. This transparent shell is easy to observe the water level and is also sunny.

At the end of one operation cycle, the above-mentioned treatment system does not need to scrape off the 10-30mm thick filter material surface layer in the sand-replenishing hybrid biological slow filter device 10, but adds 20-40mm thick clean filter material, and the supplemented The clean filter material is evenly mixed with the 10-30mm thick surface layer of the original filter material, so that not only does not need to stop, but also can make full use of the biological flora in the sand-filling hybrid biological slow filter device 10, and restore the effluent water quality in 4-7 days The time for reaching the standard is shortened to 2 to 5 days, and the efficiency of the sand-filling hybrid biological slow filter treatment system for cellar water is increased by about 10%. This kind of processing system can replenish sand 3 to 5 times a year, do maintenance once a year, remove the surface layer of filter material and add clean filter material many times, prolonging the maintenance period.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (7)

1. A sand replenishment mixed biological slow filtration system comprising:

a water storage container (15), an upper water inlet tank (13), an oxygenation unit (3), a sand-supplementing mixed biological slow filter device (10), a clear water tank (8), a water pump (9), a water level control meter (1), a flow meter (12) and a water supplementing automatic control device (14); wherein,

the water storage container (15) is communicated with an upper water inlet tank (13) through a pipeline provided with a water pump (9), a water level controller (1) is arranged in the upper water inlet tank (13), a water outlet of the upper water inlet tank (13) is connected with the oxygen increasing unit (3) through a pipeline provided with a flow meter (12), a water splashing plate (11) is arranged in the oxygen increasing unit (3), the oxygen increasing unit (3) is connected with a water inlet at the upper end of the sand supplementing mixed type biological slow filtering device (10) through a flange (4), a water outlet is arranged at the lower end of the sand supplementing mixed type biological slow filtering device (10), and the water outlet is connected into the clean water tank (8) through a water outlet pipe (7);

the water replenishing automatic control device (14) is electrically connected with the water pump (9) and the water level control meter (1), and can control the start or stop of the water pump according to a signal of the water level control meter (1) to replenish water to the upper water inlet tank (13);

the sand-replenishing mixed biological slow filter device (10) has 3-5 sand-replenishing cycles per year; the sand filling mode of each sand filling period is as follows: and directly supplementing and adding 20-40 mm of clean filter material in an operating state, uniformly mixing the supplemented filter material with the thickness of 10-30 mm on the surface layer of the original filter material, and recovering the effluent to reach the standard for 2-5 days.

2. The sand-supplementing hybrid biological slow filter system according to claim 1, wherein the sand-supplementing hybrid biological slow filter device (10) adopts a sand-supplementing hybrid biological slow filter or a sand-supplementing hybrid biological slow filter column, and a filter material consisting of a fine sand layer (5) and a gravel layer (6) is arranged in the sand-supplementing hybrid biological slow filter column from top to bottom.

3. The sand-supplementing hybrid biological slow filter system according to claim 2, wherein the thickness of the fine sand layer (5) in the sand-supplementing hybrid biological slow filter device (10) is 600-900 mm, the thickness of the gravel layer (6) is 100-200 mm, the particle size of the fine sand layer (5) is 0.25-0.5 mm, and the particle size of the gravel layer (6) is 15-25 mm.

4. The sand replenishment hybrid biological slow filtration system according to claim 1, wherein the splash plate (11) in the aeration unit (3) is located above the liquid level in the aeration unit (3) and is 100mm from the inner top of the aeration unit (3);

an overflow port is arranged on the oxygenation unit (3).

5. The sand replenishment mixed type biological slow filter system according to any one of claims 1 to 3, wherein the filtering speed of the sand replenishment mixed type biological slow filter device (10) is 0.1 to 0.3m/h, the sand replenishment period is 2 to 4 months, and the operation period is one year.

6. A sand replenishment hybrid biological slow filtration system according to any one of claims 1 to 3, wherein the sand replenishment hybrid biological slow filtration device (10) employs a transparent housing.

7. A sand replenishment mixed type biological slow filter system according to any one of claims 1 to 3, wherein the sand replenishment mixed type biological slow filter device (10) is operated for 3 to 5 sand replenishment cycles and then is subjected to a maintenance period, and the maintenance manner of each maintenance period is as follows: and (3) shoveling filter materials added for multiple times in each sand supplementing period between the current maintenance period and the last maintenance period on the surface layer of the filter material in the sand supplementing mixed type biological slow filtering device (10), supplementing 10-30 mm thick clean filter materials, and normally operating after a recovery period of 4-7 days.