CN112169437B

CN112169437B - Automatic filtering system and method for car washing water

Info

Publication number: CN112169437B
Application number: CN202011027896.4A
Authority: CN
Inventors: 牛寅龙; 邹洁朗; 王亮; 袁东辉; 王小林
Original assignee: First Construction Sichuan Co ltd Of China Construction Third Engineering Bureau; First Construction Co Ltd of China Construction Third Engineering Division
Current assignee: First Construction Sichuan Co ltd Of China Construction Third Engineering Bureau; First Construction Co Ltd of China Construction Third Engineering Division
Priority date: 2020-09-26
Filing date: 2020-09-26
Publication date: 2022-12-09
Anticipated expiration: 2040-09-26
Also published as: CN112169437A

Abstract

The invention discloses an automatic filtering system and method for car washing water, which comprises a primary filtering tank, a pretreatment filter, a clean water tank and a back washing filtering system; the pretreatment filter is arranged in the primary filter tank and is positioned below the water inlet of the primary filter tank, the pretreatment filter comprises a fixing piece, a pretreatment filter assembly and a buoyancy piece, and the pretreatment filter assembly comprises a bottom filter screen and a side wall filter screen which is folded along the circumferential direction of the bottom filter screen; the primary filter tank is communicated with the clean water tank through a back flush filter system; the back-flushing filtering system comprises a water inlet branch pipe, a water outlet branch pipe, a back-flushing branch pipe, a drain pipe and a back-flushing device. The beneficial effects of the invention are: the occupied area is small; the efficiency of sediment precipitation filtration is improved, back flush filtration system can realize the high efficiency filtration and the automatic discharge to silt when not influencing sediment filtration efficiency, guarantee to filterable continuation and the continuity of carwash water.

Description

Automatic car washing water filtering system and method

Technical Field

The invention relates to the technical field of vehicle washing water precipitation and filtration in construction sites, in particular to a vehicle washing water automatic filtration system and a vehicle washing water automatic filtration method.

Background

In the construction process of engineering such as buildings, municipal works and the like in China, a car washing groove is generally arranged at an entrance and an exit of a construction site for washing construction vehicles, so that the vehicles with mud are prevented from polluting municipal roads. In order to improve the recycling rate of the car washing water, a three-stage sedimentation tank and a water circulation system are generally arranged beside the car washing tank and used for collecting, settling and recycling the car washing water. But the third-stage sedimentation depends on a sediment self-sedimentation mode, so that not only is the filtering efficiency low, but also the occupied space is large. In addition, sediment deposited in the sedimentation tank is inconvenient to clean, the management pressure is high, especially in the project earthwork construction and driving stage, a large amount of sediment can be deposited in the three-level sedimentation tank when a large number of vehicles enter and exit, and the high-frequency cleaning of the three-level sedimentation tank can bring burden to the management of the project entrance and exit. In order to solve the problem, the mode that increases the silt pump in the sedimentation tank is usually adopted to carry out the clearance of sedimentation tank, take the chinese utility model patent that publication number is CN210409611U as an example, it discloses an automatic sediment desilting system that deposits of construction car washer, realize the desilting work of sedimentation tank through putting into a plurality of silt pumps in tertiary sedimentation tank, though this kind of mode can realize the automatic desilting of tertiary sedimentation tank, but the water flow can influence the precipitation effect of tertiary sedimentation tank around the silt pump during operation, especially when the precipitate is taken out, water in the sedimentation tank need fill should take out the original space of precipitate, lead to the water in the sedimentation tank to produce the vortex, influence the precipitation effect.

Disclosure of Invention

The invention aims to solve the problems that the existing construction site car washing water sedimentation tank is large in occupied area, sediment is inconvenient to clean and sedimentation and filtration efficiency is low, and provides an automatic car washing water filtration system which comprises a primary filtration tank, a pretreatment filter, a clean water tank and a backwashing filtration system;

the pretreatment filter is arranged in the primary filter tank and is positioned below a water inlet of the primary filter tank, and the pretreatment filter comprises a fixing piece, a pretreatment filter assembly and a buoyancy piece; the fixing piece is connected with the primary filtering tank; the buoyancy piece is arranged on the pretreatment filter assembly and is used for enabling the pretreatment filter assembly to suspend or float in the primary filter tank; the pretreatment filtering component is movably connected with the fixing piece and comprises a filter screen; the primary filter tank is communicated with the clean water tank through a back-flushing filter system.

Furthermore, the back-washing filtering system comprises a water inlet branch pipe, a water discharge branch pipe, a back-washing branch pipe, a drain pipe and a back-washing device; a first electromagnetic valve and a water suction pump are arranged on the water inlet branch pipe, one end of the water inlet branch pipe is communicated with the primary filter tank, and the other end of the water inlet branch pipe is communicated with the backwashing device; one end of the drainage branch pipe is communicated with the backwashing device, and the other end of the drainage branch pipe is communicated with the clean water tank; one end of the back washing branch pipe is communicated with the clean water tank, and the other end of the back washing branch pipe is communicated with the water inlet branch pipe between the first electromagnetic valve and the water suction pump; the sewage discharge pipe is communicated with the reverse flushing device.

Further, the fixing piece comprises a vertically arranged buoyancy channel for limiting the suspension or floating track of the pretreatment filter assembly and the buoyancy piece, and the pretreatment filter assembly is at least partially arranged in the buoyancy channel; the filter screen includes bottom filter screen and follows the lateral wall filter screen that bottom filter screen circumference was foldd.

Further, the pretreatment filter further comprises a spring and a support; the supporting piece is movably arranged in the buoyancy channel, and the buoyancy piece is arranged at the upper end of the supporting piece; the pretreatment filtering component is arranged at the upper end of the buoyancy piece; and two ends of the spring are respectively connected with the fixing piece and the supporting piece.

Further, the pretreatment filter also comprises a lifting rope connected with the pretreatment filter assembly.

Further, the back washing device comprises a shell, a multi-way valve, a central pipe, a filter disc and a filter material; the multi-way valve comprises a valve body, a valve core, a first channel, a second channel, a third channel and a fourth channel, wherein the valve body and the valve core are matched to control the on-off of the first channel, the second channel, the third channel and the fourth channel; the central tube is arranged in the shell; the lower end of the central pipe is provided with a filter disc, and the diameter of a filter hole of the filter disc is smaller than that of the filter material; a side chamber is arranged in the shell along the circumferential direction of the central pipe, and a filter material is filled in the side chamber; the first channel is communicated with the water inlet branch pipe and the side chamber, and the third channel is communicated with the central pipe and the water discharge branch pipe so as to realize forward filtration of flowing water; the second channel is communicated with the water inlet branch pipe and the central pipe, and the fourth channel is communicated with the side chamber and the sewage discharge pipe to realize the back flushing of the back flushing device.

Furthermore, the part of the water inlet branch pipe, which is positioned in the primary filter tank, is also communicated with a first bottom valve and a ball float valve.

Furthermore, a second bottom valve and a second electromagnetic valve are communicated with the back washing branch pipe; the second bottom valve is arranged in the clean water tank.

Furthermore, a pressure sensor used for monitoring the pressure value in the backwashing device is communicated with the water inlet branch pipe.

The invention also provides a method for automatically filtering the car washing water, which comprises the following steps:

s1: draining the car washing water into a primary filtering tank; wherein, a pretreatment filter containing a pretreatment filtering component and a buoyancy piece is arranged in advance below a water inlet of the primary filtering tank; the pretreatment filter is suspended or floats in the primary filtering tank and is used for primarily filtering the car washing water entering the primary filtering tank;

s2: communicating the primary filter tank with a clean water tank through a backwashing filter system; the backwashing filter system pumps water in the primary filter tank out, and the water flows through a backwashing device for secondary filtration and then is discharged into a clear water tank; when the backwashing device needs to be cleaned, the backwashing filter system pumps part of the water in the clean water tank into the backwashing device to clean the backwashing device.

The invention has the beneficial effects that: the primary sedimentation and the secondary filtration of the car washing water are realized through a pretreatment filter and a backwashing filtration system, and only two pool bodies, namely a primary filtration pool and a clean water pool, are used, so that the occupied area is small compared with the existing three-stage sedimentation pool; the height of the pretreatment filter assembly can be adaptively adjusted along with the water level height of the primary filter tank under the action of the buoyancy piece of the pretreatment filter, so that the field space of the primary filter tank cannot be extruded, the sediment precipitation and filtration efficiency is improved, and because the pretreatment filter assembly is in a suspension or floating state, the sediment in the pretreatment filter assembly can be conveniently and quickly cleaned, and the integral precipitation quality of the water body in the primary filter tank is not influenced; the back flush filtration system can realize the high-efficient filtration and the automatic discharge to silt when not influencing sediment filtration efficiency, guarantee to filterable continuation and the continuity of carwash water, and back flush filtration system need not to introduce outside water source, and water resource utilization rate is high.

Drawings

FIG. 1 is a schematic structural diagram of an automatic filtration system for car washing water according to the present invention.

FIG. 2 is an enlarged schematic view of the pretreatment filter of FIG. 1.

FIG. 3 is a schematic view of the flow direction of water in the forward filtration of water flowing through the backwash assembly of FIG. 1.

Fig. 4 is a schematic view of the structure of the flow direction of water in the backwashing device in fig. 3.

In the figure, 1-water inlet; 2-pre-treatment filter; 2.1-a fixture; 2.2-pre-treatment of the filter assembly; 2.3-buoyancy element; 2.4-spring; 2.5-a support; 2.6-lifting rope; 2.7-buoyancy channel; 3-a primary filtering tank; 4-a ball float valve; 5-a first foot valve; 6-water inlet branch pipe; 7-a first solenoid valve; 8-a water pump; 9-a pressure sensor; 10-a backwashing device; 11-a multi-way valve; 12-filtering material; 13-a filter disc; 14-a sewage draining pipe; 15-a clean water tank; 16-a second foot valve; 17-a second solenoid valve; 18-backwash legs; 19-a drain leg; 20-a valve core; 21-a valve body; 22-a central tube; 23-side chamber; 24-a housing; 25-a first channel; 26-a second channel; 27-a third channel; 28-fourth channel.

Detailed Description

The invention is described in further detail below with reference to the figures and specific embodiments.

As shown in fig. 1, 2, 3 and 4, the automatic filtering system for the car washing water comprises a primary filtering tank 3, a pretreatment filter 2, a clean water tank 15 and a backwashing filtering system;

the pretreatment filter 2 is arranged in the primary filter tank 3 and is positioned below the water inlet 1 of the primary filter tank, and the pretreatment filter 2 comprises a fixing piece 2.1, a pretreatment filter component 2.2, a buoyancy piece 2.3, a spring 2.4, a supporting piece 2.5 and a lifting rope 2.6; the fixing part 2.1 is connected with the primary filter tank 3, preferably the fixing part 2.1 is in a circular tube shape which is communicated with the primary filter tank 3 up and down, and the fixing part 2.1 is arranged at the bottom of the primary filter tank 3 and keeps a certain distance with the bottom of the primary filter tank 3. The buoyancy piece 2.3 is arranged on the pretreatment filter assembly 2.2 and is used for enabling the pretreatment filter assembly 2.2 to suspend or float in the primary filter tank 3; pretreatment filtering component 2.2 and mounting 2.1 swing joint, pretreatment filtering component 2.2 include bottom filter screen and the lateral wall filter screen that folds along bottom filter screen circumference, and the lateral wall filter screen is the pipe form. The method specifically comprises the following steps: the fixing piece 2.1 comprises a buoyancy channel 2.7 which is vertically arranged and used for limiting the suspension or floating track of the pretreatment filter assembly 2.2 and the buoyancy piece 2.3, the support piece 2.5 is movably arranged in the buoyancy channel 2.7, at least part of the pretreatment filter assembly 2.2 is arranged in the buoyancy channel 2.7, the buoyancy piece 2.3 is completely arranged in the buoyancy channel 2.7, the buoyancy piece 2.3 is movably arranged at the upper end of the support piece 2.5, and of course, the buoyancy piece 2.3 can also be connected with the support piece 2.5; the pretreatment filtering component 2.2 is arranged at the upper end of the buoyancy piece 2.3; two ends of the spring 2.4 are respectively connected with the fixing piece 2.1 and the supporting piece 2.5; the buoyancy element 2.3 in this embodiment is preferably a buoyancy block or a floating ball. The lifting rope 2.6 is connected with the pretreatment filter assembly 2.2 and is used for lifting the pretreatment filter assembly 2.2 out of the fixing piece 2.1 or the buoyancy channel 2.7 thereof so as to clean silt settled in the pretreatment filter assembly 2.2.

When the car washing water enters the primary filtering tank 3 from the water inlet 1, the car washing water firstly enters the pretreatment filtering component 2.2, after the filtration of the bottom filtering net and the side wall filtering net, the water precipitated by the primary filtration enters the primary filtering tank 3, and the precipitate obtained by the primary filtration stays in the pretreatment filtering component 2.2. Because the water level entering the primary filter tank 3 rises continuously, the pretreatment filter assembly 2.2 floats upwards along with the water level under the action of the buoyancy piece 2.3, thereby ensuring that the water entering the primary filter tank 3 can be effectively filtered; meanwhile, after the water entering the primary sedimentation tank is subjected to the buffering action of the pretreatment filtering component 2.2, the flow velocity of the water is reduced, and a more powerful condition is provided for water body sedimentation at the lower part of the primary filtering tank 3.

The method for automatically filtering the car washing water by using the filtering system of the embodiment comprises the following steps:

s1: draining the car washing water into a primary filtering tank; wherein, a pretreatment filter 2 comprising a pretreatment filter component 2.2 and a buoyancy piece 2.3 is arranged in advance below a water inlet 1 of the primary filter tank 3; the pretreatment filter 2 is suspended or floated in the primary filtering tank 3 and is used for primarily filtering the car washing water entering the primary filtering tank 3;

s2: the primary filtering tank 3 is communicated with a clean water tank 15 through a backwashing filtering system; wherein, the back washing filtering system pumps out the water in the primary filtering tank 3, and discharges the water into the clean water tank 15 after the water passes through the back washing device 10 for secondary filtering; when the backwashing device 10 needs to be cleaned, the backwashing filter system pumps part of the water in the clean water tank 15 into the backwashing device 10 to clean the backwashing device.

The method specifically comprises the following steps: the primary filter tank 3 is communicated with the clean water tank 15 through a back flush filter system; the backwashing filter system comprises a water inlet branch pipe 6, a water outlet branch pipe 19, a backwashing branch pipe 18, a sewage discharge pipe 14 and a backwashing device 10; a first electromagnetic valve 7 and a water pump 8 are arranged on the water inlet branch pipe 6, one end of the water inlet branch pipe 6 is communicated with the primary filter tank 3, and the other end is communicated with a back washing device 10; one end of the drainage branch pipe 19 is communicated with the backwashing device 10, and the other end is communicated with the clean water tank 15; one end of the back washing branch pipe 18 is communicated with the clean water tank 15, and the other end is communicated with the water inlet branch pipe 6 between the first electromagnetic valve 7 and the water suction pump 8; the waste pipe 14 communicates with a back flushing device.

The back washing device 10 comprises a shell 24, a multi-way valve 11, a central pipe 22, a filter disc 13 and a filter material 12; the multi-way valve 11 comprises a valve body 21, a valve core 20, a first channel 25, a second channel 26, a third channel 27 and a fourth channel 28, wherein the valve body 21 and the valve core 20 are matched to control the on-off of the first channel 25, the second channel 26, the third channel 27 and the fourth channel 28; the center tube 22 is disposed within the housing 24; the lower end of the central tube 22 is provided with a filter disc 13, and the diameter of the filter hole of the filter disc 13 is smaller than that of the filter material 12; a side chamber 23 is arranged in the shell 24 along the circumferential direction of the central tube 22, and the side chamber 23 is filled with filter materials 12; as shown in fig. 3, the first channel 25 communicates with the inlet manifold 6 and the side chamber 23, and the third channel 27 communicates with the central tube 22 and the outlet manifold 19 to achieve forward filtration of the water flowing therethrough. As shown in FIG. 4, a second passage 26 communicates the inlet manifold 6 with the center pipe 22, and a fourth passage 28 communicates the side chamber 23 with the waste pipe 14 to effect back flushing of the backwash assembly 10.

The part that inlet branch pipe 6 is located elementary filtering ponds 3 still communicates first bottom valve 5 and ball-cock assembly 4, under ball-cock assembly 4's effect, makes first bottom valve 5 keep the well upper strata in 3 waters of elementary filtering ponds to when taking out from the water, it is less to the vortex influence of bottom precipitate, more does benefit to the sediment of the interior water of elementary settling ponds. The back washing branch pipe 18 is communicated with a second bottom valve 16 and a second electromagnetic valve 17; the second foot valve 16 is located in the clean water basin 15. The water inlet branch pipe 6 is also communicated with a pressure sensor 9 for monitoring the pressure value in the backwashing device 10. When the pressure sensor 9 detects that the pressure in the backwashing device 10 is too high and reaches a threshold value, the first battery valve and the first bottom valve 5 are closed, the second battery valve and the second bottom valve 16 are opened, water in the clean water tank 15 is pumped into the backwashing device 10, the water enters the central pipe 22 from the water inlet branch pipe 6 through the second channel 26, then enters the side chamber 23 from the lower end of the central pipe 22 after passing through the filter disc 13, reversely washes the filter material 12 in the side chamber 23, and sediments are flushed out to the sewage discharge pipe 14 from the fourth channel 28 to realize the automatic discharge of the sediments and the washing of the backwashing device 10. After the reverse flushing is finished, the second electromagnetic valve 17 and the second bottom valve 16 are closed, the first electromagnetic valve 7 and the first bottom valve 5 are opened, the water in the primary filter tank 3 is continuously pumped into the side chamber 23 and is discharged into the clean water tank 15 after being filtered, specifically, the water in the primary filter tank 3 enters the side chamber 23 through the first channel 25 via the water inlet branch pipe 6, passes through the filter disc 13 after being filtered by the filter material 12, enters the central pipe 22 and enters the water discharge branch pipe 19 from the third channel 27, and the water in the water discharge branch pipe 19 is discharged into the clean water tank 15, so that the forward filtering of the water in the primary filter tank 3 is realized. In the present embodiment, the opening and closing of the first passage 25, the second passage 26, the third passage 27, and the fourth passage 28 are controlled by the valve element 20 and the valve body 21 in cooperation.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims

1. The utility model provides a car wash automatic filtration system which characterized in that: comprises a primary filter tank (3), a pretreatment filter (2), a clean water tank (15) and a backwashing filter system;

the pretreatment filter (2) is arranged in the primary filter tank (3) and is positioned below the water inlet (1) of the primary filter tank, and the pretreatment filter (2) comprises a fixing piece (2.1), a pretreatment filter assembly (2.2) and a buoyancy piece (2.3); the fixing piece (2.1) is connected with the primary filtering tank (3); the buoyancy piece (2.3) is arranged on the pretreatment filtering component (2.2) and is used for enabling the pretreatment filtering component (2.2) to suspend or float in the primary filtering tank (3); the pretreatment filtering component (2.2) is movably connected with the fixing part (2.1), and the pretreatment filtering component (2.2) comprises a filter screen; the fixing piece (2.1) comprises a vertically arranged buoyancy channel (2.7) for limiting the suspension or floating track of the pretreatment filter assembly (2.2) and the buoyancy piece (2.3), and the pretreatment filter assembly (2.2) is at least partially arranged in the buoyancy channel (2.7); the filter screen comprises a bottom filter screen and a side wall filter screen which is folded along the circumferential direction of the bottom filter screen;

the pre-treatment filter (2) further comprises a spring (2.4) and a support (2.5); the supporting piece (2.5) is movably arranged in the buoyancy channel (2.7), and the buoyancy piece (2.3) is arranged at the upper end of the supporting piece (2.5); a filter screen of the pretreatment filter assembly (2.2) is arranged at the upper end of the buoyancy piece (2.3); two ends of the spring (2.4) are respectively connected with the fixing piece (2.1) and the supporting piece (2.5);

the primary filter tank (3) is communicated with the clean water tank (15) through a back flush filter system.

2. The automatic filtering system for car washing water according to claim 1, characterized in that: the backwashing filter system comprises a water inlet branch pipe (6), a water discharge branch pipe (19), a backwashing branch pipe (18), a sewage discharge pipe (14) and a backwashing device (10); a first electromagnetic valve (7) and a water suction pump (8) are arranged on the water inlet branch pipe (6), one end of the water inlet branch pipe (6) is communicated with the primary filter tank (3), and the other end of the water inlet branch pipe is communicated with the backwashing device (10); one end of the drainage branch pipe (19) is communicated with the back washing device (10), and the other end of the drainage branch pipe is communicated with the clean water tank (15); one end of the back washing branch pipe (18) is communicated with the clean water tank (15), and the other end of the back washing branch pipe is communicated with the water inlet branch pipe (6) between the first electromagnetic valve (7) and the water suction pump (8); the drain pipe (14) is communicated with the back washing device.

3. The automatic filtering system for vehicle washing water according to claim 1, characterized in that: the pretreatment filter (2) further comprises a lifting rope (2.6) connected with the pretreatment filter assembly (2.2).

4. The automatic filtering system for car washing water according to claim 2, characterized in that: the backwashing device (10) comprises a shell (24), a multi-way valve (11), a central pipe (22), a filter disc (13) and a filter material (12); the multi-way valve (11) comprises a valve body (21), a valve core (20), and a first channel (25), a second channel (26), a third channel (27) and a fourth channel (28) which are controlled to be switched on and off by the valve body (21) and the valve core (20) in a matching way; the central tube (22) is arranged in the shell (24); the lower end of the central pipe (22) is provided with a filter disc (13), and the diameter of a filter hole of the filter disc (13) is smaller than that of the filter material (12); a side chamber (23) is arranged in the shell (24) along the circumferential direction of the central pipe (22), and a filter material (12) is filled in the side chamber (23); the first channel (25) is communicated with the water inlet branch pipe (6) and the side chamber (23), and the third channel (27) is communicated with the central pipe (22) and the water outlet branch pipe (19) to realize forward filtration of flowing water; the second channel (26) is communicated with the water inlet branch pipe (6) and the central pipe (22), and the fourth channel (28) is communicated with the side chamber (23) and the sewage discharge pipe (14) to realize the back flushing of the back flushing device (10).

5. The automatic filtering system for car washing water according to claim 2, characterized in that: the part of the water inlet branch pipe (6) positioned in the primary filtering tank (3) is also communicated with a first bottom valve (5) and a ball float valve (4).

6. The automatic filtering system for car washing water according to claim 2, characterized in that: the back washing branch pipe (18) is communicated with a second bottom valve (16) and a second electromagnetic valve (17); the second bottom valve (16) is arranged in the clean water tank (15).

7. The automatic filtering system for car washing water according to claim 2, characterized in that: the water inlet branch pipe (6) is also communicated with a pressure sensor (9) for monitoring the internal pressure value of the backwashing device (10).

8. A method for automatically filtering car washing water by using the car washing water automatic filtering system of any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:

s1: draining the car washing water into a primary filtering tank; wherein, a pretreatment filter containing a pretreatment filter component and a buoyancy piece is arranged in advance below a water inlet of the primary filter tank; the pretreatment filter is suspended or floats in the primary filtering tank and is used for primarily filtering the car washing water entering the primary filtering tank;