CN218248699U - Filter system without backwashing pump - Google Patents

Abstract

The utility model discloses a no backwash pump filtration system belongs to filtration equipment technical field, backwash outlet header pipe, cross the outlet header pipe, filter inlet header pipe and four at least quartz sand filters of being connected through force (forcing) pump and sewage sedimentation tank, quartz sand filter's water inlet is equipped with respectively with filter inlet header pipe and the filtration inlet branch pipe and the backwash outlet branch pipe that backwash outlet header pipe is connected, be equipped with respectively on filtration inlet branch pipe and the backwash outlet branch pipe and filter water intaking valve and backwash outlet valve, quartz sand filter's delivery port is connected with filtration outlet header pipe through filtering outlet branch pipe, be equipped with on the outlet header pipe and can make its filtration outlet header valve as backwash inlet header pipe after closing. The system can realize the backwashing mode of the split-tank hedging by arranging at least four quartz sand filters without arranging a backwashing pump and a clean water tank, can effectively reduce the occupied area cost, ensure the backwashing strength and effectively reduce the cross sectional area of a single tank, and ensure the flushing effect.

Description

Filter system without backwashing pump

Technical Field

The utility model relates to a filtration equipment technical field especially relates to a no back flush pump filtration system.

Background

After the domestic sewage is subjected to biochemical treatment, the concentration of suspended matters in the effluent of the sedimentation tank is high (the content of the suspended matters is about 20 mg/L), and the concentration of the suspended matters is seriously higher than the national first-class A sewage discharge standard (the content of the suspended matters is about 10 mg/L), so that the discharge requirement can be met only by carrying out filtration treatment. At present, a commonly used quartz sand filter filters a sewage sedimentation tank, but most of suspended matters in biochemical effluent are activated sludge zoogles, so that the activated sludge zoogles have biological activity, can be attached to and grow on a filter medium to form slime, and can be combined with the medium to form a mud cake due to unclean flushing, so that the filter material is easy to harden in the using process, the filter area is reduced, and the treatment effect is deteriorated. Therefore, the utility model discloses a utility model patent of patent number "201410634639.5", the patent name "a back flush subsystem of filterable sewage treatment system of quartz sand" provides a filtration system with back flush function, including quartz sand filter, force (forcing) pump, pressure transmitter and back flush pump, quartz sand filter passes through force (forcing) pump and communicates with the sedimentation tank drain pipe, quartz sand filter's bottom and top are equipped with back flush inlet tube and back flush outlet pipe respectively, the back flush inlet tube passes through the back flush pump and is connected with the clean water basin, monitor the feedback of the pressure differential of inlet water pressure and outlet water pressure through pressure transmitter, start the back flush pump, back flush inlet tube is with the water suction in the clean water basin in the quartz sand filter, alright back flush. However, in the above patent of the filtering system with back flushing function, in order to provide clear water for back flushing, a clear water tank is additionally arranged, and the clear water tank will undoubtedly increase the occupied area of the whole system, resulting in an increase in the cost of land resources, and in order to ensure effective back flushing of the quartz sand filter, the back flushing flow rate is usually more than 4 times of the filtering flow rate, so as to ensure the back flushing effect, and the power of the general back flushing pump is difficult to achieve this requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem, the utility model provides a no back flush pump filtration system, through the mode that sets up four at least quartz sand filters, the novel back flush mode of branch jar offset has been realized, need not to set up back flush pump and clean water basin, can effectively reduce the land occupation cost of equipment, the drainage of many quartz sand filters simultaneously is the recoil for a quartz sand filter, make the flow of back flush be four times of filtration flow at least, can guarantee that washing strength satisfies the washing requirement, and filter under the condition of equal water yield, compare in adopting a quartz sand filter, adopt many quartz sand filters, can effectively reduce the volume of single quartz sand filter, thereby reduce its cross-sectional area, avoid too big because of the cross-sectional area, the washing strength that the edge washing strength leads to inadequately is inhomogeneous, and the not good problem of washing effect.

In order to achieve the above object, the utility model provides a following scheme: the utility model discloses a no backwash pump filtration system, including backwash outlet header pipe, filtration outlet header pipe, the filtration inlet header pipe and four at least quartz sand filters that are connected through force (forcing) pump and sewage sedimentation tank, quartz sand filter's water inlet be equipped with filter inlet manifold that filter inlet header pipe connects and with the backwash outlet header pipe that backwash outlet header pipe connects, filter inlet manifold with be equipped with respectively on the backwash outlet header pipe and filter water intaking valve and backwash outlet valve, quartz sand filter's delivery port through filter outlet header pipe with filter outlet header pipe connects, it can make after closing to be equipped with on the outlet header pipe filter outlet header pipe as backwash inlet header pipe's filtration outlet header valve.

Preferably, a pressure transmitter is arranged on the quartz sand filter.

Preferably, the backwash water outlet main pipe is connected with a sewage adjusting tank.

Preferably, the filtering water inlet main pipe is respectively provided with a first maintenance valve and a second maintenance valve which are used for being connected with a water inlet and a water outlet of the booster pump.

Preferably, the device comprises an intermediate tank, wherein a water inlet of the intermediate tank is connected with a sewage sedimentation tank, and a water outlet of the intermediate tank is connected with a filtering water inlet main pipe.

Preferably, still include and add medicine circulating line, the top of middle pond is equipped with the medicine mouth, add the inlet of medicine circulating line with filter water inlet manifold connects, add the liquid outlet of medicine circulating line with it connects to add the medicine mouth, it is connected with coagulant charge device to add between the inlet of medicine circulating line and the liquid outlet.

Preferably, a circulating liquid inlet valve is arranged at a liquid inlet of the dosing circulating pipeline.

Preferably, a metering pump is arranged at a liquid outlet of the coagulant dosing device.

The utility model discloses for prior art gain following technological effect:

1. the filter system without the backwashing pump of the utility model abandons the backwashing mode of the traditional backwashing system by adopting the backwashing pump, provides a brand-new backwashing mode of separated tank backwashing, utilizes the filtered water of the rest quartz sand filters as backwashing water to wash a certain quartz sand filter, does not need to additionally arrange a clean water tank to provide the backwashing water, and saves the occupied space; the system is at least provided with four quartz sand filters, when the rest quartz sand filters provide filtered water for one of the quartz sand filters, the backwashing flow is at least four times of the filtering flow, the backwashing strength meets the design requirement, the capacity of cleaning quartz sand filter materials is strong, and the problems that the backwashing flow is insufficient and the flow is difficult to be four times of the backwashing flow due to power attenuation after the backwashing pump is used for a long time can be effectively solved; and this system is because set up four at least quartz sand filters, under the condition of handling equal water yield, compare in adopting single quartz sand filter, four quartz sand filter's monomer volume can reduce relatively, thereby the filterable cross-sectional area of single quartz sand can effectively reduce, filter area has little 1/4 to traditional quartz sand filter, novel filter filters the cross-sectional area little, it is cleaner to wash the filter material during back flush, the back flush filter area who has solved traditional filter is big, during the back flush, the back flush is inhomogeneous, the problem of washing unclean.

2. The utility model discloses in still be equipped with between pond and the filtration inlet main pipe in the middle of and add medicine circulating line and coagulant charge device, add the coagulant through coagulant charge device in to coagulant charge device, the coagulant can effectively make the suspended solid in the middle of the pond form large granule alum blossom, be favorable to holding back of follow-up quartz sand filter to get rid of, add the effect that the medicine circulating line has then played hydraulic stirring, can make the water in middle pond 1 have the better mixture of coagulant, guarantee coagulation reaction's abundant.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a backwash-free pump filtration system.

Description of the reference numerals: 1. an intermediate tank; 2. a pressure pump; 3. filtering the water inlet main pipe; 4. a first quartz sand filter; 5. a second quartz sand filter; 6. a third quartz sand filter; 7. a fourth quartz sand filter; 8. filtering out a water outlet main pipe; 9. backwashing a water outlet main pipe; 10. filtering the water inlet branch pipe; 11. backwashing the water outlet branch pipe; 12. filtering out a water main valve; 13; filtering the water inlet valve; 14. backwashing a water outlet valve; 15. filtering out the water branch pipe; 16. a first maintenance valve; 17. repairing the valve in a second dimension; 18. a dosing circulation pipeline; 19. a coagulant adding device; 20. a circulating liquid inlet valve; 21. a metering pump; 22. a raw water pipeline for biochemical effluent.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment provides a backwash-free pump filtration system, as shown in fig. 1, comprising a pressure pump 2, a filtration water inlet main pipe 3, a filtration water outlet main pipe 8, a backwash water outlet main pipe 9 and at least four quartz sand filters (referring to fig. 1, which is a schematic diagram of four quartz sand filters, including a first quartz sand filter 4, a second quartz sand filter 5, a third quartz sand filter 6 and a fourth quartz sand filter 7), wherein the filtration water inlet main pipe 3 is connected with a sewage sedimentation tank through the pressure pump 2. The water inlet of each quartz sand filter is provided with a filtering water inlet branch pipe 10 and a backwashing water outlet branch pipe 11, and the water outlet of each quartz sand filter is provided with a filtering water outlet branch pipe 15. The filtering water inlet branch pipe 10 at the water inlet of each quartz sand filter is communicated with the filtering water inlet main pipe 3, the backwashing water outlet branch pipe 11 at the water inlet of each quartz sand filter is communicated with the backwashing water outlet main pipe 9, and the filtering water outlet branch pipe 15 at the water outlet of each quartz sand filter is communicated with the filtering water outlet main pipe 8. Each filtering water inlet branch pipe 10 is provided with a filtering water inlet valve 13, each backwashing water outlet branch pipe 11 is provided with a backwashing water outlet valve 14, the filtering water outlet main pipe 8 is provided with a filtering water outlet main valve 12, after the filtering water outlet main valve 12 is closed, the filtering water inlet valve 13 of the quartz sand filter to be backwashed is only needed to be closed, the backwashing water outlet valve 14 is opened, the filtering water outlet main pipe 8 can be used as a backwashing water inlet main pipe, and the filtered water of the rest of the quartz sand filters is sent into the quartz sand filter to be backwashed from the water outlet of the quartz sand filter to be backwashed through the filtering water outlet main pipe 8 for backwashing, so that the principle of tank separation and hedging is realized.

The working principle is as follows:

(1) And (4) normal working process: firstly, completely closing backwashing water outlet valves 14 on all quartz sand filters; then, the filtered water main valve 12 is opened; and finally, starting the pressure pump 2, pumping the water to be filtered in the sewage sedimentation tank into the filtering water inlet main pipe 3, respectively conveying the water to each quartz sand filter through the filtering water inlet branch pipe 10, filtering, and collecting the filtered water into the filtering water outlet main pipe 8 through the filtering water inlet branch pipe 10 and discharging the filtered water.

(2) Back washing flow: when a certain quartz sand filter needs backwashing (usually judged by the water inlet and outlet pressure difference of the quartz sand filter), firstly closing a filter water inlet valve 13 of the quartz sand filter to be treated, and opening a backwashing water outlet valve 14; then, closing the filtering water outlet main valve 12, continuously operating the pressure pump 2, collecting the filtered water from other quartz sand filters into the filtering water outlet main pipe 8 along the filtering water inlet branch pipes 10 to serve as backwashing water, continuously sending the filtered water from the filtering water inlet branch pipes 10 of the quartz sand filter to be backwashed into the water outlet of the quartz sand filter to be backwashed, and sending the filtered water into the quartz sand filter to be backwashed from the water outlet, flushing the filter material with the backwashing water and then flowing out from the top water inlet of the quartz sand filter, wherein at the moment, because the filtering water inlet valve 13 is closed, the backwashing water can only flow out from the filtering water inlet branch pipes 10 with the backwashing water outlet valve 14 opened and flows into the backwashing water outlet main pipe 9 for discharging, and after the step is operated for 10-15 minutes, the backwashing can be basically cleaned; finally, after the back flushing step is finished, closing the filter back flushing water outlet valve 14, opening the filter water inlet valve 13 of the quartz sand filter and the filter water outlet main valve 12 on the filter water outlet main pipe 8, and entering the normal work flow again.

The filter system without the backwashing pump adopts a split-tank backwashing operation mode, backwashing is a filter to be backwashed by water reaction of at least three working filters, backwashing flow is at least four times of filtering flow, backwashing strength meets design requirements, the capacity of cleaning quartz sand filter materials is strong, filtering capacity is recovered thoroughly, good filtering effect on effluent of biochemical treatment of domestic sewage is ensured, and when the filter materials in the filter fail, the filter materials can recover filtering activity thoroughly.

Furthermore, in the present embodiment, as shown in fig. 1, since the filtering quality of the quartz sand filter is hardened, the flow rate of the filtered water is reduced, so as to avoid that two or more quartz sand filters are hardened at the same time, which results in that one hardened quartz sand filter is closed, and then the filtered water of the other one or more hardened quartz sand filters and the filtered water of the rest uncored quartz sand filters are used as backwash water, so that the flow rate of the filtered water is insufficient, several spare quartz sand filters can be additionally arranged in the system, which do not work together with the normal quartz sand filter, and only perform flow supplement when the flow rate of the filtered water is insufficient.

In this embodiment, as shown in fig. 1, a pressure transmitter is disposed on the quartz sand filter, and the pressure difference between the water pressure in the quartz sand filter and the water pressure in the quartz sand filter can be constantly monitored by the pressure transmitter, so as to determine in time whether the quartz sand filter needs to be backwashed, and usually, when the pressure difference between the water pressure in the quartz sand filter and the water pressure in the quartz sand filter reaches 0.2Mpa, the quartz sand filter can be prepared for backwashing.

In this embodiment, as shown in fig. 1, the backwash water outlet main pipe 9 may be connected to a sewage adjusting tank, that is, returned to the original sewage treatment system, so that the backwash pump-free filtration system and the sewage treatment system form a local circulation to perform a secondary treatment on backwash water until reaching the discharge standard.

In this embodiment, as shown in fig. 1, the first maintenance valve 16 and the second maintenance valve 17 for connecting with the water inlet and the water outlet of the pressure pump 2 are separately arranged on the filtering water inlet main pipe 3, and when the pressure pump 2 is damaged and needs to be maintained or replaced, the damaged pressure pump 2 can be detached and a new pressure pump 2 can be replaced by only closing the first maintenance valve 16 and the second maintenance valve 17 to cut off the circulation of the water to be filtered in the filtering water inlet main pipe 3.

In this embodiment, as shown in fig. 1, the backwash-pump-free filtration system further comprises an intermediate tank 1 as a transition between the pressure pump 2 and the sewage sedimentation tank, a water inlet of the intermediate tank 1 is connected to a raw water pipeline 22 for biochemical effluent of the sewage sedimentation tank, and a water outlet of the intermediate tank 1 is connected to a main filtration water inlet pipe 3.

Further, in this embodiment, as shown in fig. 1, the backwash-pump-free filtration system further includes a dosing circulation pipeline 18, a dosing port is disposed at the top of the intermediate tank 1, a liquid inlet of the dosing circulation pipeline 18 is connected to the filtration water inlet main pipe 3, a liquid outlet of the dosing circulation pipeline 18 is connected to the dosing port, and a coagulant dosing device 19 is connected between the liquid inlet and the liquid outlet of the dosing circulation pipeline 18. During the filtering process, most of water in the filtering water inlet main pipe 3 flows into the quartz sand filter, and also part of water is fed back to the intermediate tank 1 through the dosing circulating pipeline 18, the coagulant dosing device 19 can add a coagulant into the dosing circulating pipeline 18, the water fed back to the intermediate tank 1 by the dosing circulating pipeline 18 can be mixed with the coagulant and brings the coagulant into the intermediate tank 1 to be fully mixed with the water to be filtered in the intermediate tank 1, and the part of water carrying the reagent can play a role of hydraulic stirring to promote the coagulant to fully contact with the water to be filtered in the intermediate tank 1 so as to ensure that the coagulation reaction is fully performed to form large-particle alum flocs, thereby being beneficial to the interception and removal of the subsequent quartz sand filter.

Further, in this embodiment, as shown in fig. 1, a circulation liquid inlet valve 20 is disposed at the liquid inlet of the chemical feeding circulation pipeline 18.

Further, in this embodiment, as shown in fig. 1, a metering pump 21 is provided at the liquid outlet of the coagulant adding device 19 so as to meter how much coagulant is added.

Further, in this embodiment, as shown in fig. 1, the main filtered water valve 12, the filtered water inlet valve 13, the backwash water outlet valve 14, and the circulating liquid inlet valve 20 in the system all adopt automatic control valves, and can automatically operate, and the operation is simple without human intervention.

The principle and the implementation mode of the utility model are explained by applying a specific embodiment, and the explanation of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (8)

1. A backwash pump-free filtration system is characterized by comprising a backwash water outlet main pipe, a filtration water inlet main pipe connected with a sewage sedimentation tank through a pressure pump and at least four quartz sand filters, wherein a water inlet of each quartz sand filter is provided with a filtration water inlet branch pipe connected with the filtration water inlet main pipe and a backwash water outlet branch pipe connected with the backwash water outlet main pipe, the filtration water inlet branch pipe and the backwash water outlet branch pipe are respectively provided with a filtration water inlet valve and a backwash water outlet valve, a water outlet of each quartz sand filter is connected with the filtration water outlet main pipe through the filtration water outlet branch pipe, and the filtration water outlet main pipe is provided with a filtration water outlet main valve capable of enabling the filtration water outlet main pipe to serve as the backwash water inlet main pipe after being closed.

2. The backwash-free pump filtration system as claimed in claim 1, wherein the quartz sand filter is provided with a pressure transmitter.

3. The backwash-free pump filtration system as claimed in claim 2, wherein the backwash water outlet header pipe is connected to a sewage conditioning tank.

4. The backwash-free pump filter system as claimed in claim 1, wherein the filter inlet manifold is provided with a first maintenance valve and a second maintenance valve for connecting with the inlet and outlet of the pressure pump.

5. The backwash-free pump filtration system as claimed in claim 1, comprising an intermediate tank, wherein the water inlet of the intermediate tank is connected to the sewage sedimentation tank, and the water outlet of the intermediate tank is connected to the filtration water inlet manifold.

6. The backwash-free pump filtration system as claimed in claim 5, further comprising a dosing circulation pipeline, wherein a dosing port is provided at the top of the intermediate tank, a liquid inlet of the dosing circulation pipeline is connected to the filtration water inlet manifold, a liquid outlet of the dosing circulation pipeline is connected to the dosing port, and a coagulant dosing device is connected between the liquid inlet and the liquid outlet of the dosing circulation pipeline.

7. The backwash-free pump filtration system as claimed in claim 6, wherein a circulation inlet valve is provided at an inlet of the chemical feed circulation line.

8. The system of claim 7, wherein the liquid outlet of the coagulant dosing device is provided with a metering pump.

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