CN219091278U - Large-flow river water multistage filtration system - Google Patents

Abstract

The utility model provides a large-flow river water multistage filtration system. The filtering system comprises two groups of working units, wherein each group of working units comprises a filter screen arranged at a water intake of a river, a drainage pipeline connected to the water intake of the river, and a cartridge filter, a water pump and a backwashing filter which are sequentially arranged on the drainage pipeline; the drainage pipelines of the two groups of working units are connected through a first back flushing pipeline and a second back flushing pipeline, each back flushing pipeline is respectively provided with two control valves, the two back flushing pipelines are connected through a connecting pipe, and the two groups of working units are used to form a parallel connection state and can mutually back flush. The utility model mainly solves the problems of unclean filtration, filter blockage, unsmooth filtration, difficult back flushing and the like of the water taking filter of the river water source heat pump at the present stage, the filtration pore diameter of the multistage filter is gradually reduced, and the river water can reach the cooling water quality requirement of the water source heat pump through multistage filtration, thereby achieving the purpose of long-term energy-saving and stable operation of equipment.

Description

Large-flow river water multistage filtration system

Technical Field

The utility model relates to the technical field of water resource treatment, in particular to a large-flow river water multistage filtering system which is used for treating a large amount of river water into a water source meeting the standard of water source heat pump use.

Background

Along with energy conservation and emission reduction becoming common knowledge, a water source heat pump which uses river water as a cold and heat source has great potential in reducing carbon emission of buildings. The river water is used as flowing water body, and the water body contains a large number of plankton and plants, various solid wastes, large and small fishes and the like, so that the long-term stable operation of the heat pump system is plagued; the existing filter is too simple, so that the requirement of the heat pump on water quality is difficult to ensure; or the system is too complicated, the operation energy consumption is high, and the maintenance and management are difficult; in addition, the filter in the existing filtering system is often blocked by dirt, bacteria are bred or the filtered water quantity is insufficient in the filtering process, and a large amount of manpower is required to be input for maintenance.

Disclosure of Invention

Aiming at the problems, the utility model provides a high-flow river multistage filtering system which has the characteristics of high filtering effect, simple structure and good stability, and the filter is easy to maintain, has high intelligent degree and can be unattended for a long time.

In order to achieve the above purpose, the present utility model provides a large-flow river water multistage filtration system, which is characterized in that: the filtering system comprises two groups of working units, wherein each group of working units comprises a filter screen arranged at a water intake of a river, a drainage pipeline connected to the water intake of the river, and a cartridge filter, a water pump and a backwashing filter which are sequentially arranged on the drainage pipeline; the drainage pipelines of the two groups of working units are connected through a first back flushing pipeline and a second back flushing pipeline, two ends of the first back flushing pipeline are respectively connected to the drainage pipeline between the cylinder type filter and the water pump of each group of working units, two ends of the second back flushing pipeline are respectively connected to the drainage pipeline between the water pump and the back flushing filter of each group of working units, an A control valve and a B control valve are respectively arranged on the first back flushing pipeline, a C control valve and a D control valve are respectively arranged on the second back flushing pipeline, the first back flushing pipeline is communicated with the second back flushing pipeline through a connecting pipe, one end of the connecting pipe is located between the A control valve and the B control valve, and the other end of the connecting pipe is located between the C control valve and the D control valve.

The utility model further adopts the technical scheme that: the back flushing filter comprises a filter cylinder and at least two filter screen units arranged in the filter cylinder, wherein the filter cylinder is internally divided into a lower water inlet cavity and an upper filter cavity, the at least two filter screen units are arranged in the filter cavity, each filter screen unit is independently provided with a first blow-off valve, and each filter screen unit is a cylindrical filter screen with two closed ends; the side surface of the water inlet cavity is provided with a water inlet, the water outlet is communicated with each filter screen unit, and the side surface of the filter cavity is provided with a water outlet communicated with one filter screen unit; the bottom of the filter cylinder is provided with a second blow-down valve.

The utility model has the preferable technical scheme that: each group of working units also comprises an online backwashing system arranged at the tail end of the drainage pipeline; the online self-cleaning system is an automatic cleaning system integrated in a main machine of the filtered river water reuse device.

The utility model has the preferable technical scheme that: the maximum diameter of particles allowed to pass through the filter screen is 40-80 mm.

The utility model has the preferable technical scheme that: the maximum diameter of the particles allowed to pass through the cartridge filter is 5 mm-30 mm.

The utility model has the preferable technical scheme that: the maximum diameter of the particles allowed to pass through the full-automatic back flushing filter is 0.2 mm-1 mm.

The utility model has the preferable technical scheme that: the full-automatic backwashing filter further comprises an automatic cleaning system, wherein the automatic cleaning system comprises a PLC control system arranged at the top of the filter cartridge, a differential pressure sensor arranged at the outer side of the filter cartridge and a water quality turbidity sensor arranged at the inner bottom of the filter cartridge, and signal output ends of the differential pressure sensor and the water quality turbidity sensor are connected with signal input ends of the PLC control system; the first blow-down valve and the second blow-down valve are electric valves, and the signal output end of the PLC control system is respectively connected with the control ends of the first blow-down valve and the second blow-down valve.

The utility model has the preferable technical scheme that: the filter screen holes of the filter screen units are wedge-shaped filter holes with small inlets and large outlets, and the inlets and the outlets of the filter holes are round chamfer angles; a first blow down valve, which is self-contained with each screen unit, is disposed on top of the filter cartridge.

The utility model has the preferable technical scheme that: when the diameter of the filter cylinder of the back flushing filter is larger than 400mm, a manual detection hole is formed in the filter cylinder body, and the aperture of the detection hole is not smaller than 200mm.

The filtering system is provided with the filter screen at the water pumping inlet and is used for filtering out larger suspended matters, fishes and the like in river water. The rear end of the filter screen is provided with a cartridge filter for filtering small fishes, leaves, algae and the like in river water, thereby providing guarantee for the safe operation of the water pump. The cylinder filter is followed by a river water taking pump, and a full-automatic back flushing filter is arranged after the water taking pump and is used for filtering sediment in river water, carcasses of small fishes caught by the water pump and the like. After fully automatic back flushing the filter, an on-line cleaning device is arranged at the condenser and the evaporator section to clean the fine mud sediment which is missed by the front-end filter.

Each group of working units comprises a water pump and two control valves, and the two working units are alternately opened and closed and back flush relative to the cylinder filter and the filter screen. The online self-cleaning system in the utility model can be an automatic cleaning system integrated in a host machine of the equipment, for example, the online self-cleaning system of an air conditioner condenser and other mature technologies and equipment can be selected.

The utility model has the beneficial effects that:

(1) The multistage water passing system has reasonable integral structure, high filtering efficiency, small resistance, high filtering speed, easy maintenance and popularization, and the river water passes through multistage filtering procedures, and a filter screen at a water intake is used for filtering large fishes, large suspended matters and the like in the river water; the cartridge filter filters small fish, shrimp and coarse particles in river water; the full-automatic back flush filter filters suspended fine sand in river water; through three-stage filtration, river water can meet the water quality requirement of cooling water of a water source heat pump, and an on-line cleaning system is arranged at the equipment end to clean the precipitated floating mud; the purpose of long-term energy-saving and stable operation of the equipment is achieved.

(2) The pressure sensors are arranged on the two sides of the filter screen of the backwashing filter, so that the filtering pressure difference of the filter screen of the filter can be sensed, and the filter screens are controlled to perform backwashing one by one or one; the bottom of the cylinder body is provided with a water quality turbidity sensor and an electric blow-down valve, and the PLC can open the electric blow-down valve according to collected sensor data or other fault conditions to discharge the dirt deposited at the bottom; the intelligent filter has the advantages of high overall filtering effect, simple structure, good stability, easy maintenance and high intelligent degree, and can be unattended for a long time.

(3) The filter screen of the back flushing filter can be a wedge-shaped filter screen, and has the characteristics of high structural strength, wear resistance and difficult adhesion of dirt.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic illustration of the normal operation of the backflushing filter of the present utility model;

FIG. 3 is a schematic representation of the backflushing condition of the backflushing filter of the present utility model;

FIG. 4 is a schematic view of the bottom blowdown of the backwash filter of the present utility model;

FIG. 5 is an expanded schematic view of the screen in the backflushing filter of the present utility model;

FIG. 6 is a schematic illustration of a screen filter Kong Fangda of a backflushing filter of the present utility model;

fig. 7 is a schematic diagram of a multi-stage filtration system in an embodiment.

In the figure: 1-filter screen, 2-drainage pipeline, 3-cartridge filter, 4-water pump, 5-back flushing filter, 500-filter cartridge, 501-filter screen unit, 502-water inlet cavity, 503-filter cavity, 504-water inlet, 505-water outlet, 506-first blowdown valve, 507-second blowdown valve, 508-PLC control system, 509-differential pressure sensor, 510-water quality turbidity sensor, 6-first back flushing pipeline, 7-second back flushing pipeline, 8-A control valve, 9-B control valve, 10-C control valve, 11-D control valve, 12-connecting pipe, 13-on-line back flushing system.

Detailed Description

The utility model is further described below with reference to the drawings and examples. Figures 1 through 6 are drawings of embodiments, which are drawn in a simplified manner, for the purpose of illustrating embodiments of the utility model in a clear and concise manner. The following technical solutions presented in the drawings are specific to embodiments of the present utility model and are not intended to limit the scope of the claimed utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

The embodiment provides a large-flow river water multistage filtering system, which is particularly shown in fig. 1, and comprises two groups of working units, wherein each group of working units comprises a filter screen 1 arranged at a river water intake, a drainage pipeline 2 connected to the river water intake, a barrel filter 3, a water pump 4, a back flushing filter 5 and an online back flushing system 13 which are sequentially arranged on the drainage pipeline 2; the online self-cleaning system 9 is an automatic cleaning system integrated in a main machine of the filtered river water reuse device. The maximum diameter of the particles allowed to pass through the filter screen 1 is 40-80 mm, the maximum diameter of the particles allowed to pass through the cylindrical filter 3 is 5-30 mm, and the maximum diameter of the particles allowed to pass through the fully automatic back flushing filter 5 is 0.2-1 mm. In the embodiment, each group of working units comprises three-stage filtration and one-stage self-cleaning devices, the filtering holes of the filter screen are gradually reduced, and each filtration level is provided with a back flushing device, so that the maintenance of the filtration system is facilitated. In specific application, the diameter of the filter holes of each stage of filter screen can be selected according to the water quality of river water and the requirement on the water quality. According to the diameter setting of the filtering holes, the Yangtze river water source can be treated to meet the use requirement of the river water source heat pump on water quality.

The embodiment provides a large-flow river multistage filtration system, which is particularly shown in fig. 1, drainage pipelines 2 of two groups of working units are connected through a first back flushing pipeline 6 and a second back flushing pipeline 7, two ends of the first back flushing pipeline 6 are respectively connected to the drainage pipelines 2 between a cylinder filter 3 and a water pump 4 of each group of working units, two ends of the second back flushing pipeline 7 are respectively connected to the drainage pipelines 2 between the water pump 4 and the back flushing filter 5 of each group of working units, an A control valve 8 and a B control valve 9 are respectively arranged on the first back flushing pipeline 6, a C control valve 10 and a D control valve 11 are respectively arranged on the second back flushing pipeline 7, the first back flushing pipeline 6 and the second back flushing pipeline 7 are communicated through a connecting pipe 12, one end of the connecting pipe 12 is positioned between the A control valve 8 and the B control valve 9, and the other end is positioned between the C control valve 10 and the D control valve 11.

The backwashing filter 5 in the embodiment, as shown in fig. 2 to 4, comprises an automatic cleaning system, a filter cartridge 500 and at least two filter screen units 501 arranged in the filter cartridge 500, wherein the filter cartridge 500 is internally divided into a lower water inlet cavity 502 and an upper filter cavity 503, the at least two filter screen units 501 are arranged in the filter cavity 503, each filter screen unit 501 is separately provided with a first blow-down valve 506, the first blow-down valve 506 is an automatic blow-down valve, and the first blow-down valve 506 is arranged at the top of the filter cartridge 500 and can control each filter screen to be in a normal working state or a backwashing state; when each filter screen is filtered or backwashed, the normal operation of other filter screen units is not affected. Each filter screen unit 501 is a cylindrical filter screen with two closed ends, a water inlet 504 is arranged on the side surface of the water inlet cavity 502, a water outlet is led to each filter screen unit 501, and a water outlet 505 communicated with one filter screen unit 501 is arranged on the side surface of the filter cavity 503. The filter screen can be divided into a plurality of parts as shown in fig. 5, and each back flushing is only carried out on a part or all of filter screen units, so that the normal use of other filters is not affected. As shown in fig. 6, the filtering holes of the filtering screen unit 501 are wedge-shaped filtering holes with small inlets and large outlets, and the filtering holes adopt small inlets for water inlet and large outlets for water outlet during operation; the inlet and the outlet of the filtering holes are round chamfers, so that dirt is easier to fall off during back flushing, and water resistance during filtering is reduced. When the diameter of the filter cylinder 500 of the backwashing filter 5 is larger than 400mm, a manual detection hole is formed in the cylinder body of the filter cylinder, the aperture of the detection hole is not smaller than 200mm, and the detection hole is convenient for a worker to perform fault detection on the filter or clean and repair internal components of the filter screen when the filter breaks down.

In the embodiment, as shown in fig. 2 to 4, the automatic cleaning system comprises a PLC control system 508 arranged at the top of the filter cartridge 500, a differential pressure sensor 509 arranged at the outer side of the filter cartridge 500, and a water turbidity sensor 510 arranged at the inner bottom of the filter cartridge 500, wherein the signal output ends of the differential pressure sensor 509 and the water turbidity sensor 510 are connected with the signal input end of the PLC control system 508; the bottom of the filter cylinder 500 is provided with a second blow-down valve 507, the second blow-down valve 507 is an electric valve, and the signal output end of the PLC control system 508 is respectively connected with the control ends of the first blow-down valve 506 and the second blow-down valve 507. The PLC control system 508 is a PLC or a control circuit board, and can receive instructions from an upper computer or an upper PLC through a 485 communication line or a network line, and control the filter screen to be in a normal working state or a back flushing state by operating the opening and closing of an automatic blow-down valve. When the water turbidity sensor 510 detects that the dirt at the bottom of the filter is excessive and exceeds a set limit value (which can be set according to the water filtered actually), the second blow-down valve 507 can be opened electrically by the PLC control system 508 to remove the dirt in the filter. When excessive dirt in the filter causes automatic back flushing failure, or a back flushing program is frequently started, or the filter is in a fault state, the second blow-down valve 507 can be electrically opened through the PLC control system 508 to remove the dirt in the filter; the PLC control system 508 may also choose to open the bottom second blow down valve 507 to attempt to automatically troubleshoot based on the particular fault conditions encountered by the filter. The differential pressure sensor 509 is arranged at two ends of the filter screen of the filter, mainly senses the blocking condition of the filter screen, can automatically judge and accurately control each filter screen to self-clean, and can also perform back flushing operation according to an upper computer control instruction. The back flushing filter can be programmed and controlled by a PLC control system 508, and the back flushing filter can be controlled by timing, constant pressure difference or compound control according to actual use scenes. The PLC control system 50 supports ModBusTCP, and can be connected to the internet of things system, so as to facilitate remote diagnosis by a worker.

The working process of the back flushing filter 5 of the utility model is shown in fig. 2 to 4 respectively, when the needle is in normal work, as shown in fig. 2, the second blow-down valve 507 is closed, river water enters the water inlet cavity 503 from the water inlet 504, passes through the filter screen through the wedge-shaped filter holes of the filter screen unit 501 for multiple times, and is discharged through the water outlet 505. During backwash, as shown in FIG. 3, the second drain valve 507 is closed and self-flushing drain may be performed through the first drain valve 506 of each screen unit 501. When the sewage is discharged through the second drain valve 507 at the bottom, as shown in fig. 4, the second drain valve 507 is only required to be opened electrically through the PLC control system 508, so that the sewage in the filter can be discharged.

The back flushing working process of the large-flow river water multi-stage filtration system in the embodiment is as follows: for convenience of description, the filter screens of the two groups of working units in the embodiment are named as 1a and 1b, the drainage pipelines are named as 2a and 2b, the cylinder filters are named as 3a and 3b, the water pumps are named as 4a and 4b, the back flushing filters are named as 5a and 5b, and the online back flushing systems 13a and 13b; by switching the control valve a to the control valve B, the water pumps 4a, 4B perform a back flushing operation of the filter screens 1a, 1B and the cartridge filters 3a, 3B. The backwashing of the filter screen 1B and the cartridge filter 3B by the water pump 4a is effected, for example, by turning on the water pump 4a and turning off the water pump 4B, while the B control valve and the C control valve are opened, and the a control valve and the D control valve are closed.

The utility model may be practiced or carried out in other embodiments and details within the scope and range of equivalents of the specific features disclosed herein are capable of modifications and variations in various respects, all without departing from the spirit of the present utility model. Other embodiments may be made by those of ordinary skill in the art without undue burden and without departing from the scope of the present utility model.

Claims (9)

1. A high-flow river water multistage filtration system is characterized in that: the filtering system comprises two groups of working units, wherein each group of working units comprises a filter screen (1) arranged at a water intake of a river, a drainage pipeline (2) connected to the water intake of the river, a barrel filter (3), a water pump (4) and a backwashing filter (5) which are sequentially arranged on the drainage pipeline (2); the drainage pipelines (2) of the two groups of working units are connected through a first back flushing pipeline (6) and a second back flushing pipeline (7), two ends of the first back flushing pipeline (6) are respectively connected to the drainage pipelines (2) between the cylinder type filter (3) and the water pump (4) of each group of working units, two ends of the second back flushing pipeline (7) are respectively connected to the drainage pipelines (2) between the water pump (4) and the back flushing filter (5) of each group of working units, an A control valve (8) and a B control valve (9) are respectively arranged on the first back flushing pipeline (6), a C control valve (10) and a D control valve (11) are respectively arranged on the second back flushing pipeline (7), the first back flushing pipeline (6) and the second back flushing pipeline (7) are communicated through a connecting pipe (12), one end of the connecting pipe (12) is located between the A control valve (8) and the B control valve (9), and the other end of the connecting pipe (12) is located between the C control valve (10) and the D control valve (11).

2. The high-flow river water multistage filtration system of claim 1 wherein: the back flushing filter (5) comprises a filter cartridge (500) and at least two filter screen units (501) arranged in the filter cartridge (500), wherein a lower water inlet cavity (502) and an upper filter cavity (503) are respectively arranged in the filter cartridge (500), the at least two filter screen units (501) are arranged in the filter cavity (503), each filter screen unit (501) is independently provided with a first blow-off valve (506), and each filter screen unit (501) is a cylindrical filter screen with two ends closed; a water inlet (504) is formed in the side face of the water inlet cavity (502), the water outlet is communicated with each filter screen unit (501), and a water outlet (505) communicated with one filter screen unit (501) is formed in the side face of the filter cavity (503); the bottom of the filter cylinder (500) is provided with a second blow-down valve (507).

3. A high flow river multistage filtration system according to claim 1 or 2 wherein: each group of working units also comprises an online backwashing system (13) arranged at the tail end of the drainage pipeline (2); the online back flushing system (13) is an automatic cleaning system integrated in a main machine of the filtered river water recycling device.

4. A high flow river multistage filtration system according to claim 1 or 2 wherein: the maximum diameter of particles allowed to pass through the filter screen (1) is 40-80 mm.

5. A high flow river multistage filtration system according to claim 1 or 2 wherein: the maximum diameter of the particles allowed to pass through the cartridge filter (3) is 5-30 mm.

6. A high flow river multistage filtration system according to claim 1 or 2 wherein: the maximum diameter of the particles allowed to pass through the back flushing filter (5) is 0.2 mm-1 mm.

7. The high-flow river water multistage filtration system of claim 2 wherein: the back flushing filter (5) further comprises an automatic cleaning system, the automatic cleaning system comprises a PLC control system (508) arranged at the top of the filter cartridge (500), a differential pressure sensor (509) arranged at the outer side of the filter cartridge (500) and a water quality turbidity sensor (510) arranged at the inner bottom of the filter cartridge (500), and signal output ends of the differential pressure sensor (509) and the water quality turbidity sensor (510) are connected with signal input ends of the PLC control system (508); the first blow-down valve (506) and the second blow-down valve (507) are electric valves, and the signal output end of the PLC control system (508) is respectively connected with the control ends of the first blow-down valve (506) and the second blow-down valve (507).

8. The high-flow river water multistage filtration system of claim 2 wherein: the filter screen holes of the filter screen unit (501) are wedge-shaped filter holes with small inlets and large outlets, and the inlets and the outlets of the filter holes are round chamfer angles; a first drain valve (506) on the self-contained unit (501) is disposed on top of the cartridge (500).

9. The high-flow river water multistage filtration system of claim 2 wherein: when the diameter of a filter cylinder (500) of the back flushing filter (5) is larger than 400mm, a manual detection hole is arranged on the filter cylinder body, and the aperture of the detection hole is not smaller than 200mm.

Images