Reverse osmosis device capable of precisely dosing

Abstract

The utility model provides a reverse osmosis device capable of accurately dosing, which comprises a reverse osmosis device, a water inlet pipe connected with the reverse osmosis device, a water outlet pipe connected with the reverse osmosis device and a medicine dissolving box, one end of the first connecting pipe is connected with the medicine dissolving box, the other end of the first connecting pipe is connected with the water inlet pipe, and the first connecting pipe is sequentially provided with a metering pump and a flow meter in the medicine flowing direction; the second connecting pipe is used for connecting the medicine dissolving box with the first connecting pipe, a first connecting point at the connecting position of the second connecting pipe and the first connecting pipe is located between the medicine dissolving box and the metering pump, and a flow calibration column is installed on the second connecting pipe; and the ORP meter is mounted on the water outlet pipe. Through parameters fed back by the flow meter and the ORP meter and in combination with the flow calibration column, the stroke length or stroke frequency of the metering pump is controlled so as to control the dosing amount, and finally accurate dosing can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely relates to a precision dosing reverse osmosis device. BACKGROUND

[0002] The traditional dosing device for sewage treatment plant treating sewage on the market is all set with a metering pump according to the amount of reagent provided by the reverse osmosis membrane supplier, and always adds the reagent according to the preset metering.

[0003] In actual use, the actual reagent consumption of the reverse osmosis device, the water treatment capacity and the environmental temperature are always fluctuating. If the fluctuation is ignored, the microorganisms (bacteria, viruses and algae) in the membrane element cannot be completely removed, and the inactivated microorganisms will be blocked in the water production end of the membrane element. Specifically, too much reducing agent is added, which not only wastes reagent, but also oxidizes the membrane element, seriously reducing the service life of the membrane element; too little microorganism is added, which will be adsorbed in the membrane element, affecting the water production capacity of the system, and even polluting the subsequent treatment system. UTILITY MODEL CONTENTS

[0004] The utility model aims at the defects of the prior art, and provides a reverse osmosis device for precise dosing, which dynamically adjusts the dosing amount through the feedback parameters of the flow meter, the test metering pump and the ORP meter.

[0005] The utility model provides a reverse osmosis device for precise dosing, which comprises a reverse osmosis device, a water inlet pipe connected with the reverse osmosis device, a water outlet pipe connected with the reverse osmosis device, and further comprises: a reagent dissolving tank, which is used for uniformly mixing the added reagent with the solvent; a first connecting pipe, one end of which is connected with the reagent dissolving tank, the other end of which is connected with the water inlet pipe, and the first connecting pipe is sequentially provided with a metering pump and a flow meter along the direction of reagent flow, the flow meter being used for monitoring the total amount of reagent entering the water inlet pipe from the first connecting pipe; a second connecting pipe, which connects the reagent dissolving tank with the first connecting pipe, a first connecting point of the second connecting pipe connected with the first connecting pipe being located between the reagent dissolving tank and the metering pump, and a flow calibration column being installed on the second connecting pipe, the flow calibration column being used for testing the actual flow of reagent after adjustment of the metering pump; and an ORP meter, which is installed on the water outlet pipe and is used for monitoring the oxidation-reduction potential of water treated by the reagent in the water outlet pipe.

[0006] Further, one end of the first connecting pipe is connected with the bottom of the medicine dissolving tank, and a section between the end and the first connecting point is in a horizontal state, one end of the second connecting pipe is connected with the top of the medicine dissolving tank, and the flow calibration column is vertically installed.

[0007] Further, a Y-type filter is further installed between the medicine dissolving tank and the first connecting point.

[0008] Further, a third connecting pipe is further included, and a fifth valve is further installed on the third connecting pipe.

[0009] Further, a pulse damper is further installed between the metering pump and the flow meter.

[0010] Further, a back pressure valve is further installed between the metering pump and the flow meter.

[0011] Further, a third valve is further installed between the back pressure valve and the flow meter.

[0012] Further, a stirrer is further installed on the medicine dissolving tank.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The stroke length or stroke frequency of the metering pump is controlled to control the medicine dosage by combining the parameters fed back by the flow meter and the ORP meter with the flow calibration column, so that the medicine can be accurately dosed, the membrane element of the reverse osmosis device is not damaged, and excessive accumulation of microorganisms is avoided.

[0015] 2. The third connecting pipe is arranged to complete the backflow of the medicine when needed, so that the medicine will not be retained in the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the utility model embodiment is shown in the figure.

[0017] Fig. 1 is a structure diagram of the utility model embodiment. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0019] Reference Figure 1 A precise drug delivery reverse osmosis device, comprising:

[0020] A medicine dissolving tank 1 is used to mix the medicine and solvent evenly, and a stirrer 11 is also installed on the medicine dissolving tank 1, which is composed of a motor and a stirring paddle. When adding medicine, only the top cover of the medicine dissolving tank 1 is opened, and the prepared medicine and solvent can be added. The medicine is the medicine for treating sewage.

[0021] A first connecting pipe 2 is connected to the bottom of the medicine dissolving tank 1 at one end, and connected to the water inlet pipe 5 at the other end. A metering pump 21 and a flow meter 22 are installed in the first connecting pipe 2 along the direction of the flow of the medicine. The flow meter 22 is used to monitor the total amount of the medicine from the first connecting pipe 2 into the water inlet pipe 5, and the metering pump 21 is used to discharge the medicine in the medicine dissolving tank 1 and adjust the flow rate. A pulse damper 24 is also installed between the metering pump 21 and the flow meter 22 in the first connecting pipe 2. The pulse damper 24 is used to alleviate the pipe vibration caused by the metering pump 21. A fourth valve A4 is also installed between the pulse damper 24 and the first connecting pipe 2. The fourth valve A4 serves as an on-off switch for the medicine entering the pulse damper 24. A back pressure valve 25 is also installed between the metering pump 21 and the flow meter 22 in the first connecting pipe 2. The back pressure valve 25 is used to adjust the pressure of the medicine before entering the water inlet pipe 5 from the first connecting pipe 2. A third valve A3 is also installed between the back pressure valve 25 and the flow meter 22 in the first connecting pipe 2. The third valve A3 serves as a control switch for the medicine entering the water inlet pipe 5 from the first connecting pipe 2.

[0022] A reverse osmosis device 3 is used to filter impurities from the sewage to be purified in the water inlet pipe 5.

[0023] Second connecting pipe 4, the second connecting pipe 4 connects the medicine dissolving tank 1 with the first connecting pipe 2, the first connecting point L1 where the second connecting pipe 4 connects with the first connecting pipe 2 is located between the medicine dissolving tank 1 and the metering pump 21, a flow calibration column 41 is installed on the second connecting pipe 4, the flow calibration column 41 is used to test the actual flow of the medicine after being adjusted by the metering pump 21, the end of the first connecting pipe 2 which connects with the bottom of the medicine dissolving tank 1 is in a horizontal state between the end and the first connecting point L1, one end of the second connecting pipe 4 connects with the top of the medicine dissolving tank 1, the flow calibration column 41 is installed vertically, a first valve A1 is installed between the first connecting point L1 and the medicine dissolving tank 1, a second valve A2 is installed between the first connecting point L1 and the flow calibration column 41, a Y-type filter 23 is also installed between the medicine dissolving tank 1 and the first connecting point L1.

[0024] The water inlet pipe 5 is connected with the reverse osmosis device 3, the sewage to be treated is discharged into the reverse osmosis device 3 through the water inlet pipe 5;

[0025] The water outlet pipe 6 is connected with the reverse osmosis device 3, an ORP meter 61 is installed on the water outlet pipe 5, the ORP meter 61 is used to monitor the oxidation-reduction potential of the water treated by the medicine in the water outlet pipe 6.

[0026] The third connecting pipe 7, a fifth valve A5 is also installed on the third connecting pipe 7, the third connecting pipe 7 is used to return the medicine, and the fifth valve A5 is used as a switch to control the conduction of the third connecting pipe 7. When returning the medicine, the third valve A3 is closed, and the fifth valve A5 is opened.

[0027] Open the first valve A1 and the second valve A2 to make the medicine enter the flow calibration column 41, record the initial scale of the liquid level, then close the first valve A1, start the metering pump 21 for a period of time, then close it, observe the liquid level scale in the flow calibration column 41 again, calculate the flow according to the difference between the two liquid level scales, adjust the stroke length or stroke frequency of the metering pump 21 according to the flow, and finally get the required flow. Through the parameters fed back by the flow meter 22 and the ORP meter 61, combined with the flow calibration column 41, the stroke length or stroke frequency of the metering pump 21 is controlled to control the dosage, and finally the medicine can be accurately dosed, without damaging the membrane elements of the reverse osmosis device, and without causing excessive accumulation of microorganisms.

[0028] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A reverse osmosis device for precise dosing, comprising a reverse osmosis unit (3), an inlet pipe (5) connected to the reverse osmosis unit (3), and an outlet pipe (6) connected to the reverse osmosis unit (3), characterized in that, Also includes: A dissolving tank (1) is used to mix the added drug with the solvent evenly; The first connecting pipe (2) has one end connected to the dissolving tank (1) and the other end connected to the water inlet pipe (5). The first connecting pipe (2) is equipped with a metering pump (21) and a flow meter (22) in sequence along the direction of drug flow. The flow meter (22) is used to monitor the total amount of drug entering the water inlet pipe (5) from the first connecting pipe (2). The second connecting pipe (4) connects the dissolving tank (1) to the first connecting pipe (2). The first connection point (L1) at the connection between the second connecting pipe (4) and the first connecting pipe (2) is located between the dissolving tank (1) and the metering pump (21). A flow calibration column (41) is installed on the second connecting pipe (4). The flow calibration column (41) is used to test the actual flow rate of the drug after the metering pump (21) is adjusted. ORP meter (61), which is installed on the outlet pipe (6), is used to monitor the oxidation-reduction potential of the water treated with chemicals in the outlet pipe (6).

2. The reverse osmosis device for precise drug dosing according to claim 1, characterized in that: One end of the first connecting pipe (2) is connected to the bottom of the dissolving tank (1), and the section between this end and the first connection point (L1) is horizontal. One end of the second connecting pipe (4) is connected to the top of the dissolving tank (1), and the flow calibration column (41) is installed vertically.

3. The reverse osmosis device for precise drug dosing according to claim 2, characterized in that: The second connecting pipe (4) has a first valve (A1) installed between the first connection point (L1) and the dissolving tank (1), and a second valve (A2) installed between the first connection point (L1) and the flow calibration column (41).

4. The reverse osmosis device for precise drug dosing according to claim 1, characterized in that: A Y-type filter (23) is also installed between the dissolving tank (1) and the first connection point (L1), and a stirrer (11) is also installed on the dissolving tank (1).

5. The reverse osmosis device for precise drug dosing according to claim 1, characterized in that, Also includes: The third connecting pipe (7) is also equipped with a fifth valve (A5). The first connecting pipe (2) is also equipped with a back pressure valve (25) between the metering pump (21) and the flow meter (22). The first connecting pipe (2) is also equipped with a third valve (A3) between the back pressure valve (25) and the flow meter (22). The first connecting pipe (2) is also equipped with a pulse damper (24) between the metering pump (21) and the flow meter (22).

6. The reverse osmosis device for precise drug dosing according to claim 5, characterized in that: A fourth valve (A4) is also installed between the pulse damper (24) and the first connecting pipe (2).

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