阅读说明：本技术 可逆洗浮床式反向污水处理系统及其处理方法 (Reversible washing floating bed type reverse sewage treatment system and treatment method thereof ) 是由 胡鸣群 于 2020-05-21 设计创作，主要内容包括：本发明提供一种可逆洗浮床式反向污水处理系统及其处理方法,其主要应用轻质过滤砂及反向污水处理的构造与污水过滤程序的设计,使轻质过滤砂的比重小于水,能够上浮聚集在污水过滤槽顶部,用以过滤往上流动的污水,而污水中的固态杂质因比重大于水能与轻质过滤砂分离,并往下沉淀于污水过滤槽底部,达到长时间维持过滤效率、减少过滤材保养维护次数的目的。再者,通过一逆洗喷管与过滤砂清洗槽的构造及过滤砂逆洗程序,运用逆洗喷管喷入的清水,使轻质过滤砂进入过滤砂清洗槽,进而清洗轻质过滤砂,能够达到节能及降低维护成本的目的。(The invention provides a reversible washing floating bed type reverse sewage treatment system and a treatment method thereof, which mainly apply the structure of light filtering sand and reverse sewage treatment and the design of a sewage filtering program to ensure that the specific gravity of the light filtering sand is less than that of water and can float and gather at the top of a sewage filtering tank to filter the sewage flowing upwards, and solid impurities in the sewage are separated from the light filtering sand due to the specific gravity being more than that of water and settle at the bottom of the sewage filtering tank downwards, thereby achieving the purposes of maintaining the filtering efficiency for a long time and reducing the maintenance times of filtering materials. Furthermore, through the structure of a backwashing spray pipe and a filtering sand washing tank and a filtering sand backwashing program, the clean water sprayed by the backwashing spray pipe is used to make the light filtering sand enter the filtering sand washing tank so as to wash the light filtering sand, thereby achieving the purposes of saving energy and reducing maintenance cost.)

1. A reverse sewage treatment system of reversible washing and floating bed type for filtering and treating sewage into purified water, comprising:

a sewage filter tank which is a closed container with a sewage filter chamber inside, a sewage inlet pipe communicated with the sewage filter chamber is arranged near the bottom of the sewage filter tank, and a purified water drain pipe communicated with the sewage filter chamber is arranged near the top of the sewage filter tank;

a plurality of light filtering sands filled in the sewage filtering chamber and gathered upward above the sewage filtering chamber by buoyancy of water;

one end of the filtering sand cleaning tank is communicated with the top end of a sewage filtering chamber of the sewage filtering tank through a sand inlet pipe, and the other end of the filtering sand cleaning tank is communicated back to the sewage filtering chamber of the sewage filtering tank through a sand outlet pipe and is used for circularly cleaning the light filtering sand;

the backwashing spray pipe extends into the sewage filter chamber of the sewage filter tank, is positioned above the purified water drain pipe, and is used for inputting clean water to wash the light filter sand; and

and the sludge discharge device is arranged at the bottom of the sewage filtering tank and communicated with the sewage filtering chamber for discharging bottom deposited sludge.

2. The reverse sewage treatment system of claim 1 wherein the lightweight filter sand is a filter particle having a specific gravity less than that of water.

3. The reverse sewage treatment system of claim 1 wherein the sewage inlet pipe is provided with a first valve, the clean water outlet pipe is provided with a second valve, the sand inlet pipe is provided with a third valve, the sand outlet pipe is provided with a fourth valve, and the reverse washing nozzle is provided with a fifth valve.

4. The reverse sewage treatment system of claim 1, wherein the wall of the clean water drain pipe is provided with a plurality of meshes or screens for blocking the light filtering sand from entering and only allowing clean water to flow into the clean water drain pipe.

5. The reverse sewage treatment system of claim 1 wherein said reverse washing spout is provided with a plurality of meshes or screens that block said light filtered sand from entering while allowing only clean water to flow into said sewage filtration chamber.

6. The reverse sewage treatment system of claim 1, wherein the sludge discharging means comprises a sludge conveyor provided at the bottom of the sewage filtering tank, and a sludge discharging pipe communicating with the bottom of the sewage filtering chamber through the sludge conveyor.

7. The reverse sewage treatment system of claim 1, wherein a water level gauge is disposed at one side of the sewage filtering tank.

8. The reverse sewage treatment system of claim 7, wherein the water level meter is a water level transparent window opening a side wall of the sewage filtering tank, or a transparent water level pipe installed at one side of the sewage filtering tank, and the transparent water level pipe is communicated with the sewage filtering chamber.

9. A method of treatment using the reversible wash-and-float bed reverse sewage treatment system of any of claims 1-8, comprising a sewage filtration process, the steps of said sewage filtration process comprising:

(a) opening a purified water drain pipe of the sewage filter tank, and closing a sand inlet pipe, a sand outlet pipe, the backwashing spray pipe and the sludge discharge device of the filtering sand cleaning tank;

(b) opening a sewage inlet pipe of the sewage filtering tank to enable external sewage to enter the sewage filtering chamber;

(c) the sewage flows upwards to the purified water drainage pipe through water pressure; and

(d) the light filtering sand is gathered above the sewage filtering chamber through the buoyancy of the sewage and filters impurities in the sewage flowing upwards, and the sewage is filtered into purified water and is discharged through the purified water discharging pipe; and

(e) solid impurities adsorbed by the light filter sand settle to the bottom of the sewage filter chamber to form sludge to be discharged by using the sludge discharge device.

10. The method of claim 9, comprising a filtered sand backwash process, the steps of the filtered sand backwash process comprising:

(f) firstly, closing a sewage inlet pipe, a purified water drain pipe and the sand outlet pipe of the sewage filter tank, and opening a sand inlet pipe of the filtering sand cleaning tank;

(g) opening the reverse washing spray pipe to enable clean water to enter the sewage filtering chamber;

(h) the light filtering sand is washed by the clean water, so that the light filtering sand floats upwards and enters the filtering sand washing tank through the sand inlet pipe;

(i) under the state that the sand outlet pipe is closed, the filtering sand cleaning tank cleans the light filtering sand in the filtering sand cleaning tank and stores the light filtering sand in the filtering sand cleaning tank; and

(j) closing the sewage inlet pipe, the purified water drain pipe, the sand inlet pipe and the backwashing spray pipe, and opening the sand outlet pipe; and then starting the sludge discharge device to discharge the sludge deposited at the bottom of the sewage filtering chamber, so that the sewage filtering chamber forms a vacuum negative pressure state, and light filtering sand in the filtering sand cleaning tank is promoted to flow back to the sewage filtering chamber through the sand outlet pipe.

Technical Field

The invention relates to a sewage treatment system and a sewage treatment method, in particular to a reversible floating bed type reverse sewage treatment system and a sewage treatment method, which enable sewage to flow in a direction opposite to the deposition direction of impurity particles.

Background

At present, the sewage treatment equipment does not adopt filter cloth (filter screen and filter cotton) filtration or centrifugal filter element filtration or filtration by using a sand filtration gravity settling mode or a pressure squeezing mode. Above-mentioned filter cloth (filter screen, filter pulp) filtration mode lets sewage downflow pass through the filter cloth, makes solid-state impurity in the sewage and harmful substance gather and form mud on the surface (filter screen, filter pulp), in case when the mud on surface is too thick, will directly influence filterable efficiency, must often change filter cloth (filter screen, filter pulp) or dismantle the washing, leads to the maintenance procedure too much and with high costs. The gravity settling filtration method of filtering sand has the disadvantages of constructing a settling tank, thus causing large occupied area and time consumption for construction, and a large amount of flocculating agent must be used for accelerating the settling. As for the centrifugal filter element filtration and the pressure squeezing filtration, many power devices are needed, the device cost is high, the sewage treatment capacity is limited, and the sewage treatment cost is too high. Therefore, the present invention is to overcome the problem of depositing impurity particles in sewage on a filter material, and to separate the impurity particles from the sewage using a minimum amount of energy, so as to clean the filter material and remove sludge.

Disclosure of Invention

In view of the above-mentioned shortcomings of the conventional technologies, the applicant is not perfected, and is therefore interested in studying and overcoming the shortcomings, and based on the accumulated experience of the applicant in the industry for many years, a reversible floating bed type reverse sewage treatment system and a treatment method thereof are developed, so as to achieve the purposes of maintaining the filtration efficiency for a long time, reducing the maintenance frequency of the filter material, saving energy, reducing the maintenance cost, facilitating the sludge treatment, simplifying the maintenance procedure, and the like.

The invention mainly aims to provide a reversible washing floating bed type reverse sewage treatment system and a treatment method thereof, which are mainly characterized in that the sewage flows in the direction opposite to the deposition direction of impurity particles through the structure of a sewage filter tank and the application of light filter sand, so that the problem of impurity particle deposition on a filter material is solved, and the effects of maintaining the filtering efficiency for a long time, reducing the maintenance times of the filter material, saving energy, reducing the maintenance cost, facilitating the sludge treatment, simplifying the maintenance program and the like are further achieved.

In order to achieve the above and other objects, the present invention provides a reverse sewage treatment system of a reversible washing floating bed type for filtering sewage into purified water, preferably comprising a sewage filter tank which is a closed container having a sewage filter chamber therein, a sewage inlet pipe communicating with the sewage filter chamber being provided near the bottom thereof, and a purified water outlet pipe communicating with the sewage filter chamber being provided near the top thereof; a plurality of light filtering sands filled in the sewage filtering chamber and gathered upward above the sewage filtering chamber by buoyancy of water; one end of the filtering sand cleaning tank is communicated with the top end of a sewage filtering chamber of the sewage filtering tank through a sand inlet pipe, and the other end of the filtering sand cleaning tank is communicated back to the sewage filtering chamber of the sewage filtering tank through a sand outlet pipe and is used for circularly cleaning the light filtering sand; the backwashing spray pipe extends into the sewage filter chamber of the sewage filter tank, is positioned above the purified water drain pipe, and is used for inputting clean water to wash the light filter sand; and a sludge discharge device which is arranged at the bottom of the sewage filter tank and communicated with the sewage filter chamber for discharging bottom deposited sludge.

In the above-mentioned reversible washing floating bed type reverse sewage treatment system, the light filter sand is filter particles having a specific gravity smaller than that of water.

In the above-mentioned reverse sewage treatment system of reversible washing bed formula of floating, this sewage inlet tube is equipped with a first valve, and this water purification drain pipe is equipped with a second valve, and this sand inlet pipe is equipped with a third valve, and this sand outlet pipe is equipped with a fourth valve, and the reverse washing spray tube is equipped with a fifth valve.

In the above-mentioned reversible washing floating bed type reverse sewage treatment system, the pipe wall of the purified water drainage pipe is provided with a plurality of meshes or screens for preventing the light filtering sand from entering and only allowing purified water to flow into the purified water drainage pipe.

In the above-mentioned reverse sewage treatment system, the reverse washing nozzle is provided with a plurality of meshes or screens for blocking the light filtering sand from entering the sewage filtering chamber and allowing only clear water to flow into the sewage filtering chamber.

In the above-mentioned reverse sewage treatment system of reversible washing floating bed formula, this sludge discharging equipment contains a sludge conveyer who sets up in this sewage filter tank bottom to reach a sludge discharge pipe through this sludge conveyer intercommunication this sewage filter chamber bottom.

In the above-mentioned reversible washing floating bed type reverse sewage treatment system, a water level gauge is arranged on one side of the sewage filtering tank.

In the above-mentioned reverse sewage treatment system of reversible washing floating bed formula, this water gage is for opening the water level perspective window of a lateral wall of this sewage filter tank, or a transparent water level pipe of installing in this sewage filter tank one side, this transparent water level pipe intercommunication this sewage filter chamber.

In order to achieve the above and other objects, the present invention provides a method for treating a reverse sewage treatment system of a reversible washing floating bed type, comprising a sewage filtration process, wherein the sewage filtration process comprises the steps of (a) opening a clean water drain pipe of a sewage filtration tank, and closing a sand inlet pipe, a sand outlet pipe, a reverse washing nozzle and a sludge discharge device of a sand filtration washing tank; (b) then opening the sewage inlet pipe of the sewage filter tank to make the external sewage enter the sewage filter chamber; (c) the sewage flows upwards to the purified water drain pipe through water pressure; (d) the light filtering sand is gathered above the sewage filtering chamber through the buoyancy of the sewage, the light filtering sand filters impurities in the sewage which flows upwards, and the sewage is filtered into purified water and is discharged through the purified water discharging pipe; and (e) solid impurities adsorbed by the light filtering sand settle to the bottom of the sewage filtering chamber to form sludge to be discharged by using the sludge discharge device.

The treatment method of the reversible washing floating bed type reverse sewage treatment system comprises a filtering sand backwashing procedure, wherein the filtering sand backwashing procedure comprises the following steps of (f) closing a sewage inlet pipe and a purified water drain pipe of the sewage filtering tank, and opening a sand inlet pipe and a sand outlet pipe of the filtering sand washing tank; (g) opening the reverse washing spray pipe to make clear water enter the sewage filtering chamber; (h) the clean water washes the light filtering sand, so that the light filtering sand floats upwards and enters the filtering sand washing tank through the sand inlet pipe; (i) the filtering sand cleaning tank is used for cleaning the light filtering sand in the filtering sand cleaning tank; and (j) starting the sludge discharge device to discharge the sludge deposited at the bottom of the sewage filtering chamber, and promoting the light filtering sand of the filtering sand cleaning tank to flow back to the sewage filtering chamber through the sand outlet pipe.

The reversible washing floating bed type reverse sewage treatment system and the treatment method thereof can achieve the following effects:

the invention makes the specific gravity of the light filtering sand smaller than water, and can float and gather on the top of the sewage filtering tank to filter the sewage flowing upwards through the structure of the light filtering sand and the reverse sewage treatment and the design of the sewage filtering program; the solid impurities in the sewage are separated from the light filter sand due to the fact that the specific gravity of the solid impurities is larger than that of water energy, and most of the solid impurities automatically precipitate at the bottom of the sewage filter tank downwards, so that the effects of maintaining the filtering efficiency for a long time and reducing the maintenance times of the filter material are achieved.

The invention can utilize the structure of the backwashing spray pipe and the filtering sand washing tank and the backwashing program design of the filtering sand, and utilizes the clean water sprayed by the backwashing spray pipe to enable the light filtering sand to float upwards and enter the filtering sand washing tank through the sand inlet pipe, thereby further washing the light filtering sand, and the light filtering sand does not need to be taken out and pumped by a pump, thereby achieving the effects of saving energy and reducing the maintenance cost.

And thirdly, the sludge deposited at the bottom of the sewage filtering chamber is discharged through the sludge discharge device, so that the effects of conveniently treating the sludge and simplifying the maintenance procedure can be achieved.

Drawings

FIG. 1 is a perspective view of a preferred embodiment of the reverse sewage treatment system of the present invention.

FIG. 2 is a schematic view showing a sewage filtration process of the reversible wash-and-float bed type reverse sewage treatment system of the present invention.

FIG. 3 is a schematic diagram of a reverse filter sand washing procedure of the reverse floating bed type reverse sewage treatment system of the present invention.

Detailed Description

For a fuller understanding of the objects, features and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

referring to fig. 1 and 2, a reverse sewage treatment system of a reversible washing floating bed type according to the present invention for filtering and treating inputted sewage into purified water and outputting the purified water includes a sewage filter tank 10, which is a closed container having a sewage filter chamber 11 therein, and may be formed of a vertical cylindrical tank, having an upper tapered portion 12 at the top end thereof, a lower tapered portion 13 at the bottom end thereof, a sewage inlet pipe 14 communicating with the sewage filter chamber 11 at a position near the bottom thereof, and a purified water outlet pipe 15 communicating with the sewage filter chamber 11 at a position near the top thereof. A plurality of light filtering sands 20, which are light filtering particles having a specific gravity less than that of water (<1), filled in the sewage filtering chamber 11, gathered upward above the sewage filtering chamber 11 and the upper tapered portion 12 by buoyancy of water, for filtering impurities and harmful substances in the sewage. A filtering sand washing tank 30 for storing and washing the light filtering sand 20, wherein one end of the filtering sand washing tank 30 is communicated with the top end of the upper cone 12 of the sewage filtering chamber 11 of the sewage filtering tank 10 through a sand inlet pipe 31, and the other end of the filtering sand washing tank 30 is communicated back to the sewage filtering chamber 11 of the sewage filtering tank 10 through a sand outlet pipe 32, so that the filtering sand washing tank can be used for circularly washing the light filtering sand 20 and storing the light filtering sand 20 in the filtering sand washing tank 30. A backwashing nozzle 40 having one end extended into the sewage filtering chamber 11 of the sewage filtering tank 10 and positioned above the clean water discharging pipe 15 and the other end connected to a source of clean water for feeding clean water into the sewage filtering chamber 11 to wash the light filtering sand 20. And a sludge discharging device 50 which is provided at the bottom of the lower cone portion 13 of the sewage filtering tank 10 and communicated with the sewage filtering chamber 11 for discharging the settled sludge 80 at the bottom of the sewage filtering chamber 11.

Referring to fig. 1 and 2, in order to realize automatic control for filtering and cleaning sewage, the preferred embodiment of the present invention comprises a first valve 16 disposed on the sewage inlet pipe 14 of the sewage filtering tank 10, and a second valve 17 disposed on the purified water outlet pipe 15; the sand inlet pipe 31 of the filtering sand cleaning tank 30 is provided with a third valve 33, and the sand outlet pipe 32 is provided with a fourth valve 34; the back washing spray pipe 40 is provided with a fifth valve 41; the first to fifth valves are electrically operated valves, and can open and close the pipeline through an automatic controller. The wall of the clean water discharge pipe 15 is provided with a barrier structure or device such as a plurality of meshes 151 or a screen for blocking the light filtering sand 20 from entering the pipe and allowing only clean water to flow into the clean water discharge pipe 15; the backwash nozzle 40 is also provided with a plurality of mesh openings 42 or a screen or other blocking structure or device for blocking the light filtering sand 20 from entering the pipe and allowing only clean water to flow into the sewage filter chamber 11.

Referring to fig. 1 and 2, one of the preferred embodiments of the sludge discharging apparatus 50 comprises a sludge conveyer 51 disposed at the bottom of the lower cone portion 13 of the sewage filtering tank 10, and a sludge discharging pipe 52 connected to the bottom of the sewage filtering chamber 11 through the sludge conveyer 51; the sludge conveyor 51 may be a screw conveyor, a pump-in pipe conveyor, or the like, and any mechanism that can suck up and convey the sludge 80 to the outside can be applied to the present invention. In addition, a water level meter 60 may be further disposed on one side of the sewage filtering tank 10, and the water level meter 60 may be a water level transparent window 61 formed on one side wall of the sewage filtering tank 10, or a transparent water level pipe (not shown) disposed on one side of the sewage filtering tank 61 and communicated with the sewage filtering chamber 11 to display the water level in the sewage filtering chamber 11 and the height of the light filtering sand 20.

Referring to fig. 2, the present invention provides a treatment method of a reversible floating bed type reverse sewage treatment system, wherein the treatment method comprises a sewage filtration process, and the implementation steps of the sewage filtration process comprise:

(a) first opening the second valve 17 of the clean water drain pipe 15 of the sewage filter tank 10, closing the third valve 33 of the sand inlet pipe 31 and the fourth valve 34 of the sand outlet pipe 32 of the filtered sand cleaning tank 30, closing the fifth valve 41 of the backwash nozzle 40, and closing the sludge discharge device 50;

(b) then the first valve 16 of the sewage inlet pipe 14 of the sewage filtering tank 10 is opened, so that the external sewage enters the sewage filtering chamber 11 through the sewage inlet pipe 14;

(c) the sewage flows upward toward the clean water drain pipe 15 (as shown by the solid arrows of fig. 2) in the sewage filter chamber 11 by the injected water pressure, and floats the light filter sand 20;

(d) the light filtering sand 20 is gathered above the sewage filtering chamber 11 by the buoyancy of the sewage, the light filtering sand 20 filters impurities and harmful substances in the sewage flowing upwards, the flowing sewage is filtered into purified water, and then the purified water is discharged outwards through the purified water discharging pipe 15; and

(e) the solid impurities 70 adsorbed by the light filtering sands 20 settle to the bottom of the sewage filtering chamber 11 (as shown by the dotted arrow of fig. 2) because of the specific gravity greater than that of water, and are then deposited to form sludge 80 to be discharged using the sludge discharging apparatus 50.

Therefore, the reversible washing floating bed type reverse sewage treatment system and the treatment method thereof can float and gather at the top of the sewage filter tank 11 by the light filtering sand 20 with the specific gravity smaller than that of water so as to filter the sewage flowing upwards; the solid impurities 70 in the sewage are naturally separated from the light filtering sand 20 due to the specific gravity of the water being greater than that of the water, and are deposited at the bottom of the sewage filtering tank 10, so that the effects of maintaining the filtering efficiency for a long time and reducing the maintenance times of the filtering material can be achieved.

Referring to fig. 3, the present invention provides a treatment method of a reversible-bed-washing reverse sewage treatment system, wherein the treatment method comprises a sand filtration backwashing procedure, and the sand filtration backwashing procedure preferably comprises the following steps:

(f) firstly closing the first valve 16 of the sewage inlet pipe 14 of the sewage filter tank 10, the second valve 17 of the clean water discharge pipe 15 and the fourth valve 34 of the sand outlet pipe 32, and opening the third valve 33 of the sand inlet pipe 31 of the filtered sand cleaning tank 30;

(g) then the fifth valve 41 of the back washing nozzle 40 is opened, so that the external clean water enters the sewage filter chamber 11;

(h) the clean water washes the light filtering sand 20 in the sewage filtering chamber 11, so that the light filtering sand 20 floats upwards through the sand inlet pipe 31 to enter the filtering sand washing tank 30 under the action that the specific gravity is smaller than that of water;

(i) in a state that the fourth valve 34 of the sand outlet pipe 32 is closed, the filtered sand wash tank 30 washes the light filtered sand 20 therein and stores the washed light filtered sand in the filtered sand wash tank 30; and

(j) closing the first valve 16 of the sewage inlet pipe 14, the second valve 17 of the clean water outlet pipe 15, the third valve 33 of the sand inlet pipe 31 and the fifth valve 41 of the backwash spray pipe 40, and opening the fourth valve 34 of the sand outlet pipe 32; then the sludge discharging device 50 is started to discharge the sludge 80 deposited at the bottom of the sewage filtering chamber 11, the sewage filtering chamber 11 is formed into a vacuum negative pressure state by the effect of the sludge 80 discharged by the sludge discharging device 50, the light filtering sand 20 in the filtering sand cleaning tank 30 is sucked and returned to the sewage filtering chamber 11 through the sand outlet pipe 32, and the cleaning process of the light filtering sand 20 is performed circularly.

According to the invention, the light filter sand 20 used for a period of time can be cleaned through the structures of the backwashing spray pipe 40 and the filter sand cleaning tank 30 and the backwashing program of the filter sand, and the light filter sand 20 does not need to be taken out in the cleaning process and other pumps do not need to be used for pumping, so that the effects of saving energy and reducing the maintenance cost can be achieved; meanwhile, the sludge discharging device 50 discharges the sludge 80 deposited at the bottom of the sewage filtering chamber 11, so that the light filtering sand 20 in the filtering sand cleaning tank 30 flows back to the sewage filtering chamber 11 through negative pressure, and the effects of saving energy, facilitating sludge treatment and simplifying maintenance procedures can be achieved.

While the invention has been described in terms of preferred embodiments, it will be understood by those skilled in the art that the embodiments are illustrative only and should not be taken as limiting the scope of the invention. It should be noted that equivalent variations and substitutions to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be determined by the claims.

[ notation ] to show

10 sewage filter tank

11 sewage filtering chamber

12 upper taper part

13 lower cone part

14 sewage inlet pipe

15 clean water drain pipe

151 mesh

16 first valve

17 second valve

20 light filtering sand

30 filtering sand cleaning tank

31 sand inlet pipe

32 sand outlet pipe

33 third valve

34 fourth valve

40 reverse washing spray pipe

41 fifth valve

42 mesh

50 sludge discharge device

51 sludge conveyer

52 sludge discharge pipe

60 water level meter

61 water level perspective window

70 solid impurities

80 sludge