CN209735104U - Backwashing device of micro-filter - Google Patents

Abstract

The utility model relates to a back washing unit of microstrainer, including the support, the upper portion of support is rotated and is connected with filter drum, and the position that is close to filter drum top on the support is provided with back washing unit, and back washing unit includes the flushing line that is connected with high-pressure back flush water pump, its characterized in that: the flushing pipe has the running water storage tank through first pipe connection, be provided with the first control flap that whether the control running water got into the flushing pipe on the first pipeline, be provided with the second control flap that whether the running water that gets into the flushing pipe got into filter drum on the flushing pipe, the one end of running water storage tank has the second pipeline that supplies the running water to get into, compares with prior art, the utility model has the advantages of in order to prevent to adopt the sea water after filtering as the water source, the sea water quantity is great, then utilizes the running water of running water storage tank as the water source that erodees filter drum for wash the solid filth on the filter drum, can practice thrift the water cost effectively.

Description

Backwashing device of micro-filter

Technical Field

The utility model belongs to the technical field of the aquatic products is bred, concretely relates to back washing unit of microfilter to crab breed circulating water.

Background

The rotating net of the micro-filter rotates to drive sewage when in work, water is thrown out of the rotating net and particulate matters are left in the rotating net and discharged under the action of the spiral mechanism due to the action of centrifugal force, so that the aim of solid-liquid separation is fulfilled. In the process, the mesh of the rotary net is always blocked, so that the treatment effect is influenced. The ideal effect is difficult to achieve by adopting the conventional net flushing method. In order to solve the problems, for example, a Chinese patent application No. 201510302126.9 (with publication No. CN104922964A) discloses a rotary net, a waterproof cover, strip-shaped board brushes, water inlet pipes, water spray outlets and a scouring support, wherein the waterproof cover is arranged on the outer side of the rotary net, two rows of scouring supports are arranged on the waterproof cover, the strip-shaped board brushes are respectively arranged on the scouring supports, the water inlet pipes are arranged between the strip-shaped board brushes, the water spray outlets are uniformly arranged at the bottom of the water inlet pipes, the device adopts a method that the rotary net rotates a front strip-shaped brush to brush up blocking objects of meshes, then the blocking objects are washed by 0.3-0.6MPa pressure water, and then the blocking objects are cleaned by a rear strip-shaped brush, because the cleaning is carried out by double brushes, the scouring alternation and the repeated circulation are realized, the cleaning effect is good, the cleaning is carried out while working, but the scouring process adopts filtered seawater as a water source, the dosage of seawater is larger, a large amount of seawater needs to be added into the system regularly, and the cost is high for a farm with a shortage of seawater resources.

Disclosure of Invention

The utility model aims to solve the technical problem that a micro-filter back washing device capable of effectively reducing the use amount of seawater in the washing and scouring process is provided aiming at the current situation of the prior art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the back washing device of the micro-filter comprises a support, wherein the upper part of the support is rotatably connected with a filtering roller, the position, close to the upper part of the filtering roller, on the support is provided with the back washing device, the back washing device comprises a washing pipeline connected with a high-pressure back washing water pump, and the back washing device is characterized in that: the flushing pipeline is connected with a tap water storage tank through a first pipeline, a first control valve for controlling whether tap water enters the flushing pipeline is arranged on the first pipeline, a second control valve for controlling whether the tap water entering the flushing pipeline enters the filtering roller is arranged on the flushing pipeline, and a second pipeline for the tap water to enter is arranged at one end of the tap water storage tank.

In order to facilitate the washing of the filtering roller, the washing pipeline is arranged in parallel with the axis of the filtering roller, and at least two spray heads facing the filtering roller are arranged at the bottom of the washing pipeline.

In order to facilitate the discharge of the sewage after the washing of the filtering roller out of the filtering roller, a sewage discharge barrel corresponding to the back washing device is arranged above the inside of the filtering roller, one end of the sewage discharge barrel is connected with a sewage discharge pipe, and the filtering roller is provided with a water inlet pipe for the sewage to enter.

In order to further reduce the pollution to the environment after the sewage is discharged, a descending channel for reducing the flow speed of the sewage is arranged at the position of the sewage discharge pipe, which is adjacent to the discharge port.

In order to further re-filter the sewage, the flow reducing channel comprises a pipe body, the pipe body is provided with a containing cavity capable of containing the sewage, a water inlet and a water outlet communicated with the containing cavity are formed in two ends of the pipe body respectively, a blocking frame is arranged in the pipe body and comprises at least two sliding sheets which are overlapped with each other and can rotate mutually, at least one opening is formed in the periphery of each sliding sheet, the openings of the sliding sheets can be overlapped with each other in the mutual rotation process of the sliding sheets, and meshes cover the openings.

further increase the filtration time of sewage and blow off pipe, the gleitbretter includes first gleitbretter and second gleitbretter, the second gleitbretter can rotate on the plane at first gleitbretter place, and the inside wall shaping of body has enables first gleitbretter is relative the rotatory first ring channel of body, correspondingly, the inside wall shaping of body enables the second gleitbretter is relative the rotatory second ring channel of body.

In order to ensure that the tap water storage tank has sufficient water storage, a first water level sensor and a first controller in communication connection with the first water level sensor are arranged in the tap water storage tank.

In order to prevent the water level in the filtering roller from being too high, a second water level sensor and a second controller in communication connection with the second water level sensor are arranged in the filtering roller. When the water level rises to a set height, the situation that solid particles in a filtering roller of the micro-filter are more and block most of meshes is solved, so that the water level at the front end of water inlet rises, the second water level sensor outputs a signal, the second controller controls and starts the filtering roller driving motor and the back washing device, the filtering roller driving motor drives the filtering roller to drive the dirt on the filter screen to rotate, and when the dirt passes through the position right above the filtering roller, the back washing device washes the dirt into the dirt discharging barrel and flows out of the filtering roller.

Compared with the prior art, the utility model has the advantages of in order to prevent to adopt the sea water after the filtration as the water source, the sea water quantity is great, then utilizes the running water of running water storage water tank as the water source that erodees filter drum for wash the solid filth on the filter drum, can water economy cost effectively, in addition, the running water is different with the osmotic pressure of sea water, has the disinfection effect to filter drum's surface, can reduce the biological adhering to of filter drum surface, the life of extension equipment.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the blocking frame at position A of the present invention;

Fig. 3 is a cross-sectional view of the first sliding piece according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in FIGS. 1 to 3, the preferred embodiment of the present invention is described. The back washing device 3 of the micro-filter comprises a bracket 1, the upper part of the bracket 1 is rotatably connected with a filter roller 2, the position on the bracket, which is close to the upper part of the filter roller 2, is provided with the back washing device 3, the back washing device 3 comprises a washing pipeline 31 connected with a high-pressure back washing water pump, the washing pipeline 31 is connected with a tap water storage tank 5 through a first pipeline 4, the first pipeline 4 is provided with a first control valve 41 for controlling whether tap water enters the washing pipeline 31, the washing pipeline 31 is provided with a second control valve 42 for controlling whether tap water entering the washing pipeline 31 enters the filter roller 2, one end of the tap water storage tank 5 is provided with a second pipeline 6 for tap water entering, the washing pipeline 31 is arranged in parallel with the axis of the filter roller 2, the bottom of the washing pipeline 31 is provided with a plurality of spray nozzles 311 facing the filter roller 2, thus the cleaning of the filter roller 2 adopts a, the flushed suspended solid particles are discharged through a sewage drain 7. In order to ensure sufficient water storage of the tap water storage tank 5, a first water level sensor 51 and a first controller in communication connection with the first water level sensor 51 are disposed in the tap water storage tank 5, and in order to prevent the water level in the filtering drum 2 from being too high, a second water level sensor 21 and a second controller (not shown in the figure) in communication connection with the second water level sensor 21 are disposed in the filtering drum 2. When the water level rises to a set height, it is shown that more solid particles exist in the filtering roller 2 of the micro-filter, most meshes are blocked, the water level at the front end of the water inlet rises, at the moment, the second water level sensor 21 outputs a signal, the second controller controls and starts the filtering roller 2 driving motor and the backwashing device 3, the filtering roller 2 driving motor drives the filth on the filtering roller 2 to rotate, when the filth passes right above the filtering roller 2, the backwashing device 3 flushes the filth into the sewage discharge pipe 7, the filth flows out of the filtering roller 2, in order to discharge the sewage flushed out of the filtering roller 2, a sewage discharge barrel 30 corresponding to the backwashing device 3 is arranged above the inside of the filtering roller 2, one end of the sewage discharge barrel 30 is connected with the sewage discharge pipe 7, and the filtering roller 2 is provided with.

In order to re-filter the sewage, a position of the sewage discharge pipe 7 adjacent to the discharge port is provided with a flow reducing channel 9 for reducing the flow speed of the sewage, the flow reducing channel 9 comprises a pipe body 91, the pipe body 91 is provided with a containing cavity capable of containing the sewage, two ends of the pipe body 91 are respectively provided with a water inlet 911 and a water outlet 912 communicated with the containing cavity, a blocking frame is arranged in the pipe body 91 and comprises at least two sliding sheets which are mutually overlapped and can mutually rotate, each sliding sheet is provided with a plurality of openings 40 at the periphery, the openings 40 of the sliding sheets can be mutually overlapped in the mutual rotation process of the sliding sheets, the openings 40 are covered with a mesh 401, the embodiment takes two sliding sheets as an example for unfolding and comprises a first sliding sheet 10 and a second sliding sheet 20, the second sliding sheet 20 can rotate on the plane where the first sliding sheet 10 is located, and a first annular groove 101 which can enable the first sliding sheet 10 to rotate relative to the pipe body, correspondingly, the inside wall shaping of body 91 enables the relative rotatory second ring channel 201 of body 91 of second gleitbretter 20, utilizes the relative inside wall of body 91 of first gleitbretter 10 and second gleitbretter 20 to rotate, can increase sewage and blow off pipe 7's filter time when sewage passes through body 91 separation frame, and sewage discharges after the filtering action of separation frame again like this, can effectively reduce the pollution.

When the sewage treatment device works, sewage naturally flows into the filtering roller 2 through the water inlet flange, and flows out after being filtered by two layers of filter screens, solid sewage in the sewage can be retained on the filter screen of the sewage discharge barrel 30, when the water level rises to a set height, the situation that solid particles on the inner side of the filter screen of the micro-filter are more and block most of meshes is solved, so that the water level at the front end of the water inlet rises, the first water level sensor 51 outputs a signal at the moment, the PLC controller controls and starts the driving motor of the filtering roller 2 and the high-pressure back-flushing water pump, the driving motor of the filtering roller 2 drives the filtering roller 2 to drive the sewage on the sewage discharge barrel 30 to rotate, when the sewage passes through the position right above the filtering roller 2, the back-flushing device 3 flushes the sewage into the sewage discharge barrel 30 and flows out of the filtering roller 2 through the sewage discharge, the energy is saved, so that the sea and fresh water back flushing can be freely switched, when the sea water is needed to be flushed, the tap water storage tank 5 stops supplying tap water, the first control valve 41 can be closed, and the second control valve 42 can be closed; when fresh water flushing is needed, the tap water storage tank 5 can supply tap water, and at the moment, the first control valve 41 is opened, and the second control valve 42 is opened; when it is desired to use fresh water to enter the flush line 31 of the backwash assembly 3, but no fresh water flush is required, the first control valve 41 may be opened and the second control valve 42 may be closed.

Claims (8)

1. The utility model provides a back flush unit of microstrainer, is including support (1), the upper portion of support (1) rotates and is connected with filter drum (2), the position that is close to filter drum (2) top on the support is provided with back flush unit (3), back flush unit (3) include wash pipeline (31) that are connected with high-pressure back flush water pump, its characterized in that: wash pipeline (31) and be connected with running water storage tank (5) through first pipeline (4), be provided with control running water on first pipeline (4) and whether get into first control valve (41) that wash pipeline (31), it gets into second control valve (42) that filter drum (2) whether to be provided with the running water that gets into wash pipeline (31) on wash pipeline (31), the one end of running water storage tank (5) has second pipeline (6) that supply the running water to get into.

2. The microfiltration machine back-flushing device of claim 1, wherein: the flushing pipeline (31) is arranged in parallel with the axis of the filtering roller (2), and at least two spray heads (311) facing the filtering roller (2) are arranged at the bottom of the flushing pipeline (31).

3. The microfiltration machine back-flushing device of claim 2, wherein: a sewage discharge barrel (30) corresponding to the backwashing device (3) is arranged above the inner part of the filtering roller (2), one end of the sewage discharge barrel (30) is connected with a sewage discharge pipe (7), and a water inlet pipe (8) for sewage to enter is arranged on the filtering roller (2).

4. The microfiltration machine back-flushing device of claim 3, wherein: and a flow reducing channel (9) for reducing the flow speed of sewage is arranged at the position, adjacent to the discharge port, of the sewage discharge pipe (7).

5. The microfiltration machine back-flushing device of claim 4, wherein: the utility model discloses a sewage treatment device, including falling flow channel (9) and falling flow channel, including body (91), body (91) have the appearance chamber that can hold sewage, the both ends of body (91) open respectively have with hold communicating water inlet (911) and outlet (912) of chamber, be provided with the separation frame in body (91), the separation frame includes at least two mutual overlap and can the gleitbretter of mutual rotation to every gleitbretter is provided with an opening (40) at least at the periphery, and opening (40) of each gleitbretter can overlap each other in the mutual rotation process of gleitbretter, opening (40) coats and is stamped net piece (401).

6. The microfiltration machine back-flushing device of claim 5, wherein: the gleitbretter includes first gleitbretter (10) and second gleitbretter (20), second gleitbretter (20) can rotate on the plane at first gleitbretter (10) place, and the inside wall shaping of body (91) has the ability to make first gleitbretter (10) are relative body (91) rotatory first ring channel (101), correspondingly, the inside wall shaping of body (91) can make second gleitbretter (20) are relative body (91) rotatory second ring channel (201).

7. The back washing device of a micro-filter according to any one of claims 1 to 6, characterized in that: a first water level sensor (51) and a first controller in communication connection with the first water level sensor (51) are arranged in the tap water storage tank (5).

8. The back washing device of a micro-filter according to any one of claims 1 to 6, characterized in that: and a second water level sensor (21) and a second controller in communication connection with the second water level sensor (21) are arranged in the filtering roller (2).