CN209878801U - Filter backwash tester and its filter backwash test system - Google Patents

Abstract

The utility model discloses a filter backwash tester and a filter backwash test system thereof. The tester is fixed on a support above the filter, and the tester is provided with an air collection chamber, a gas pipe, and a flow rate from bottom to top. A plurality of test ports are provided side by side for the gas collection chambers. The bottom end of each gas collection chamber is open and inserted below the liquid level of the filter, and the top of each gas collection chamber is connected to an independent Each of the flow rate test ports is provided with a flow rate detector, and the flow rate test port is provided with a gas outlet for discharging the gas collected in the gas collection chamber. The utility model has the advantages of being able to reliably monitor the backwash, obtain accurate data parameters, facilitate the staff to adjust the backwash pressure in real time, ensure the quality of the backwash, and thus indirectly improve the filtering effect of the filter pool.

Description

Filter backwash tester and its filter backwash test system

technical field

The utility model relates to the field of water treatment, in particular to a test device for backwashing a filter in water treatment.

Background technique

Modern water plants basically use filter tank filtration technology to treat water. There is a filter port at the bottom of the filter tank. The filter port is usually connected to the backwash pipeline. The filter material is laid above the filter port. The filter material will absorb and retain impurities in the water. The filter tank is used for a period of time. After that, the filtration will stop, and the backwashing pipe will supply water to the filter port, and the filter will spray water from bottom to top for backwashing, which is used to wash away the adsorbed impurities in the filter material.

At present, there is no special test equipment for backwashing, and it is impossible to detect the quality and effect of backwashing. Therefore, the current water supply pressure for backwashing is determined according to experience. If the momentum is too large, the filter material will be lost, and the momentum will not be flushed if it is too small. Impurities in the filter material, experience obviously cannot accurately control backwashing.

Utility model content

The technical problem to be solved by the utility model is to realize an instrument capable of accurately monitoring and testing the backwashing condition of the filter tank.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a filter backwash tester, the tester is fixed on the bracket above the filter, and the tester is provided with an air collection chamber, a trachea, and a flow rate tester from bottom to top. There are several gas-collecting chambers arranged side by side. The bottom end of each gas-collecting chamber is open and inserted below the liquid level of the filter. The top of each gas-collecting chamber is connected to an independent Each of the flow rate test ports is provided with a flow rate detector, and the flow rate test port is provided with a gas outlet for discharging the gas collected in the gas collection chamber.

Each of the flow rate detectors sends the collected parameters to a processor, and the processor stores the obtained data and/or sends them to a display screen for display.

The width of the air-collecting chambers arranged side by side is slightly smaller than the width of the filter tank, and the upper part of the air-collecting chambers is connected to the trachea through an air outlet, and the gas outlet is a structure whose diameter gradually decreases from the air-collecting chamber to the trachea.

The flow rate test port is a tubular structure arranged horizontally. The flow rate detector includes fins and stress sensors. The fins are fixed above the inner wall of the flow rate test port and extend vertically downward. The stress sensors are fixed on the fins. On-chip, the stress sensor outputs fin deformation parameter values to the processor.

A filter backwash test system, the system includes a bracket and the filter backwash tester;

The bracket is provided with bilateral step counting tracks fixed on both sides of the filter tank, the truss sliding group is located above the filter tank and supported on the bilateral step counting tracks by the step counting wheel, and the driving step counting track is fixed on the truss sliding group The power unit that rotates the wheel, and the filter backwash tester is suspended under the truss sliding group.

A lifting mechanism moving in the vertical direction is fixed on the truss sliding group, and the filter backwash tester is fixed on the lifting mechanism of the truss sliding group.

A sonar device is fixed along the air collecting cavity, and the sonar device collects distance data from the filter material to a processor, and the processor outputs a driving signal to the lifting mechanism and the power unit.

The utility model has the advantages of being able to reliably monitor backwashing, obtain accurate data parameters, facilitate staff to adjust backwashing pressure in real time, ensure backwashing quality, and thus indirectly improve the filtering effect of the filter pool.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Fig. 1 is the structural representation of filter backwash tester;

Fig. 2 is a schematic diagram of the structural support of the filter backwashing test system;

Fig. 3 is the structural representation of flow rate detector;

The direction of the arrow in Figure 1 and Figure 3 is the air flow direction;

The marks in the above pictures are: 1. Truss sliding group; 2. Filter tank; 3. Bilateral pedometer track; 4. Pedometer wheel; 5. Lifting mechanism; 6. Flow rate detector; 7. Flow rate test port; 8 , trachea; 9, air outlet; 10, gas collection cavity; 11, fins; 12, stress sensor.

Detailed ways

The utility model utilizes the backwashing air bubbles to be converted into airflow during blasting, and the gas in the air bubbles is collected to form a continuous airflow through the air bubble collection device, and the backwashing condition of the detection surface can be detected by detecting the airflow state, and then the air bubbles are driven by the sliding table moving device When the collector moves, the backwashing state of the entire filter tank 2 can be detected. Finally, the cleaning condition of the entire filter tank 2 can be obtained through microcomputer processing.

The working principle of the filter 2 backwash tester: when the filter 2 is backwashed, the air bubbles from the bottom of the pool reach the water surface and then burst, the gas in the bubbles is collected by the air bubble collector, and the gas collection end of the air bubble collector is placed in the water Next, when multiple air bubbles burst in the collector, air flow will be generated, and the gas will flow along the pipeline through the hydraulic pressure, and the flow state of the air flow will be detected through the detection chamber, so as to know the washing intensity and washing effect of the current area. The air bubble collector is composed of multiple The collection chambers are combined to measure the flushing effect of single point and multiple points at the same time.

As shown in Figure 1, the filter tank 2 backwash tester is fixed on the bracket above the filter tank 2, and can adopt the method of line scanning, that is, a plurality of gas collection chambers 10 are arranged side by side, and the number of gas collection chambers 10 depends on the width of the filter tank 2 Depending on the situation, the width of the air-collecting chambers 10 arranged side by side is slightly smaller than the width of the filter tank 2, so as to avoid interference with the tank wall when scanning along the filter tank 2. The tester is equipped with an air collection chamber 10, a trachea 8, and a flow rate test port 7 from bottom to top. Each air collection chamber 10 is equipped with an independent air pipe 8 and a flow rate test port 7. The test port 7 constitutes a pipe structure that runs through up and down. In order to ensure the measurement efficiency, the inner diameter of the air pipe 8 is smaller than that of the gas collection chamber 10, and the inner diameter of the flow rate test port 7 is smaller than that of the air pipe 8, which can increase the impact force of the gas flow formed by collecting air bubbles. The upper part of the gas collection chamber 10 communicates with the gas pipe 8 through the gas outlet 9, and the gas outlet 9 is a structure whose diameter gradually decreases from the gas collection chamber 10 to the gas pipe 8, which can help to increase the flow rate of the collected gas.

Each flow rate test port 7 is provided with a flow rate detector 6, and the flow rate test port 7 is provided with the gas outlet 9 that the gas collected by the gas collection chamber 10 is discharged. The pressure device, for example, can adopt the mechanism shown in Figure 3, the flow rate test port 7 is a tubular structure arranged horizontally, the flow rate detector 6 includes fins 11 and stress sensors 12, and the fins 11 are fixed above the inner wall of the flow rate test port 7 And extend vertically downward, the bottom of the fin 11 is not in contact with the bottom of the inner wall of the flow rate test port 7, and there is a gap for the fin 11 to bend, and the vertical arrangement of the fin 11 can prevent the fin 11 from bending due to its own gravity , to reduce the difficulty of conversion, the stress sensor 12 is fixed on the fin 11, and the stress sensor 12 senses the curvature of the fin 11. When the airflow is large, the curvature of the fin 11 is large; when the airflow is small, the curvature of the fin 11 is small, and the stress The sensor 12 outputs the deformation parameter value of the fin 11 to the processor.

Each flow rate detector 6 transmits the collected parameters to the processor, which constitutes the collection of backwash parameters in different areas on a line. When the filter 2 backwash tester moves along the filter 2, it can test the entire The flushing uniformity of the pool and the flushing intensity of each position. The processor stores and/or transmits the acquired data to the display screen for display.

Based on the filter 2 backwash tester, a filter 2 backwash test system can also be designed, which includes a bracket and a filter 2 backwash tester. As shown in Figure 2, the bracket is provided with bilateral step counting tracks 3 fixed on both sides of the filter tank 2, and the truss sliding group 1 is positioned above the filter tank 2 and is supported on the bilateral step counting tracks 3 by the step counting wheel 4, and the step counting wheel 4. Accurate walking can be performed to obtain the position (coordinate) information of the filter tank 2 backwashing tester. A power unit that drives the pedometer wheel 4 to rotate is fixed on the truss sliding group 1. The power unit can be a gear box connected to a stepping motor, and the filter tank 2 backwash tester is suspended below the truss sliding group 1.

A depth measuring device is installed on the side of the bubble collector. After the washing is completed, the entire pool can be scanned under the drive of the sliding table. The uniformity of the filter material can be known under the computer processing. At the same time, the measuring device can be used before and after washing The deep device scans to obtain the height difference before and after washing, and the expansion rate of the filter material can be obtained through numerical calculation. Expansion ratio = (height after flushing - height before flushing) / height before flushing *%.

The sounding device can use sonar equipment, which is fixed along the air collection chamber 10, and adopts the filter material spacing in the area below the truss sliding group 1. When the sonar equipment is working, it will collect the distance data from the filter material to the processor, and the processor will simultaneously The drive signal is output to the lifting mechanism 5 and the power unit to coordinate the work of the entire filter tank 2 backwashing test system.

In order to prevent the filter tank 2 backwash test system from affecting the normal operation of the filter tank 2, a lifting mechanism 5 moving vertically is fixed on the truss sliding group 1, and the filter tank 2 backwashing tester is fixed on the lifting mechanism 5 of the truss sliding group 1 , when the filter tank 2 is working normally, the filter tank 2 backwash tester can be raised, which can prevent the filter tank 2 backwash tester from affecting its work, and can also prevent sewage from corroding the filter tank 2 backwash tester.

Based on the test method of the above-mentioned filter tank 2 backwash test system:

In the initial state, the pedometer wheel 4 supports the truss sliding group 1 at one end of the filter tank 2, and the lifting mechanism 5 is in a rising state, and the sonar equipment and the gas collection chamber 10 are located above the liquid level of the filter tank 2;

Before backwashing, the lifting mechanism 5 is lowered, the sonar equipment and the air collection chamber 10 are placed below the liquid level of the filter tank 2, and the pedometer wheel 4 is driven to walk along the bilateral pedometer track 3 so that the truss sliding group 1 travels to the other side of the filter tank 2 At one end, the pedometer wheel 4 walks and starts the sonar device at the same time, and transmits the obtained filter material height information to the processor;

Start the backwash, drive the pedometer wheel 4 to walk along the bilateral pedometer track 3 so that the truss sliding group 1 travels to the initial end of the filter tank 2, the pedometer wheel 4 walks, and the flow velocity detector 6 transmits the acquired flow velocity information to the processor;

After the backwash is finished, drive the pedometer wheel 4 to walk along the bilateral pedometer track 3 so that the truss sliding group 1 travels to the other end of the filter tank 2, and the pedometer wheel 4 walks and starts the sonar device at the same time, and then transmits the obtained filter material height information to processor;

Finally, the lifting mechanism 5 rises to lift the sonar equipment and the gas collection chamber 10 above the liquid level of the filter tank 2 .

When the sonar device is working, it collects the height information of the filter material in the area below the truss sliding group 1 of the filter tank 2, and the sonar device transmits the obtained filter material height information to the processor with the current position information of the pedometer wheel 4;

When the flow velocity detector 6 is working, the average value of the flow velocity within the set time is sent to the processor, along with the current position information of the pedometer wheel 4 .

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (7)

1. The back flush tester of the filter tank, its characteristic lies in: the tester is fixed on the support above the filter tank, the tester is equipped with gas collection chamber, trachea, velocity of flow test mouth from bottom to top, the gas collection chamber is equipped with a plurality ofly side by side, every the bottom opening in gas collection chamber inserts the liquid level below in filter tank, every gas collection chamber top communicates an independent velocity of flow test mouth, every through independent trachea all be equipped with a velocity of flow detector in the velocity of flow test mouth, and the velocity of flow test mouth is equipped with the gas outgoing's that collects the gas collection chamber gas outlet.

2. The filter backwash tester according to claim 1, wherein: each flow rate detector transmits the acquired parameters to a processor, and the processor stores and/or transmits the acquired data to a display screen for display.

3. A filter backwash tester as claimed in claim 1 or 2, wherein: the width of the gas collection cavities arranged side by side is slightly smaller than that of the filter, the upper parts of the gas collection cavities are communicated with the gas pipe through the gas outlet, and the gas outlet is of a structure that the caliber of the gas pipe is gradually reduced from the gas collection cavity.

4. A filter backwash tester as claimed in claim 3, wherein: the flow velocity testing port is of a horizontally arranged tubular structure, the flow velocity detector comprises a fin and a stress sensor, the fin is fixed above the inner wall of the flow velocity testing port and vertically extends downwards, the stress sensor is fixed on the fin, and the stress sensor outputs a fin deformation parameter value processor.

5. The utility model provides a filtering pond back flush test system which characterized in that: the system comprises a bracket and the filter backwashing tester as recited in any one of claims 1 to 4;

the support is provided with bilateral step counting tracks fixed on two sides of the filter, the truss sliding group is positioned above the filter and supported on the bilateral step counting tracks through step counting wheels, a power unit for driving the step counting wheels to rotate is fixed on the truss sliding group, and the filter backwashing tester is suspended below the truss sliding group.

6. The filter backwash test system of claim 5 wherein: and a lifting mechanism moving in the vertical direction is fixed on the truss sliding group, and the filter chamber backwashing tester is fixed on the lifting mechanism of the truss sliding group.

7. The filter backwash test system of claim 6 wherein: fix sonar equipment along the gas collection chamber, sonar equipment gathers apart from the distance data of filter material to treater, treater output drive signal is to elevating system and power pack.