System integrating reverse osmosis membrane component and self-adaptive bactericide conveying device

Abstract

The utility model belongs to the technical field of water treatment, and particularly relates to a system integrating a reverse osmosis membrane component and a self-adaptive bactericide conveying device. The medicament pool comprises three subareas, namely a low-concentration bactericide medicament pool, a medium-concentration bactericide medicament pool and a high-concentration bactericide medicament pool, so that medicaments with different concentrations can be provided. The conveying concentration and conveying time of the bactericide are automatically adjusted, and real-time monitoring of biological membrane pollution and automatic adjustment of the conveying amount of the bactericide are achieved. The formation and development of a biological membrane are effectively controlled, so that the service time of the reverse osmosis membrane assembly is prolonged, the cleaning frequency is reduced, the pollution problem of the biological membrane is solved, the water treatment efficiency is improved, the use of chemical agents is reduced, the labor cost is reduced, the service life of the reverse osmosis membrane assembly is prolonged, and the overall operation cost is reduced.

Description

Technical Field

[0001] This utility model patent belongs to the field of water treatment technology, and specifically relates to a system that integrates a reverse osmosis membrane component and an adaptive bactericide delivery device. Background Art

[0002] In the field of water treatment technology, reverse osmosis membrane modules are highly efficient water purification devices widely used in processes such as seawater desalination, wastewater reuse, and pure water production. However, reverse osmosis membranes are susceptible to biofilm contamination during operation. This occurs when microorganisms form a sticky layer on the membrane surface, leading to increased system pressure differentials, decreased water production, reduced salt rejection, and even severe damage to the membrane modules. Traditional treatment methods include regular chemical cleaning and physical scraping, but these methods are associated with chemical waste, difficulty in achieving precise control, high labor costs, and potential damage to the membrane modules. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the present invention aims to provide a system for automatically delivering medicines of different concentrations.

[0004] A system integrating a reverse osmosis membrane assembly and an adaptive bactericide delivery device comprises a security filter, a high-pressure pump, a reverse osmosis membrane assembly I and a reverse osmosis membrane assembly II, which are sequentially connected via pipelines. A reagent pool and a dosing pump are arranged in front of the security filter. The system also comprises a PLC controller. The reagent pool comprises three partitions: a low-concentration bactericide pool, a medium-concentration bactericide pool and a high-concentration bactericide pool. The three partitions are connected to the dosing pump via a low-concentration bactericide pipeline, a medium-concentration bactericide pipeline and a high-concentration bactericide pipeline, respectively. The dosing pump is electrically connected to the PLC controller. The PLC controller controls the dosing pump to connect to the low-concentration bactericide pipeline, the medium-concentration bactericide pipeline or the high-concentration bactericide pipeline of the reagent pool.

[0005] Furthermore, a flow sensor is arranged in front of the security filter, and a reagent tank and a dosing pump are also arranged between the flow sensor and the security filter. A pre-stage pressure sensor is also arranged between the high-pressure pump and the reverse osmosis membrane assembly I, an inter-stage pressure sensor is also arranged between the reverse osmosis membrane assembly I and the reverse osmosis membrane assembly II, and a post-stage pressure sensor is also arranged on the concentrated water pipe of the reverse osmosis membrane assembly II. The flow sensor, pre-stage pressure sensor, inter-stage pressure sensor and post-stage pressure sensor are all electrically connected to the PLC controller.

[0006] Furthermore, the flow sensor, pre-segment pressure sensor, inter-segment pressure sensor and post-segment pressure sensor transmit data once every hour. The PLC controller is responsible for summarizing and processing the data information returned by the flow, pre-segment pressure, inter-segment pressure and post-segment pressure sensors, and making judgments on the dosing pump based on the data.

[0007] Specifically:

[0008] 1. Do not start the chemical dosing pump.

[0009] ① P1 < M1#1, and P2 < M2#1.

[0010] 2. Start the chemical dosing pump, connect the pipeline of the low-concentration chemical agent pool, and adjust the starting time of the chemical dosing pump according to the data.

[0011] ① M1#1 ≤ P1 ≤ M2#1, and M1#2 ≤ P2 ≤ M2#2.

[0012] 3. Start the chemical dosing pump, connect the pipeline of the high-concentration chemical agent pool, and adjust the starting time of the chemical dosing pump according to the data.

[0013] ① M2#1 < P1 ≤ M3#1;

[0014] ② M2#2 < P2 ≤ M3#2.

[0015] 4. Alarm to remind of membrane cleaning.

[0016] ① M3#1 < P1;

[0017] ② M3#2 < P2.

[0018] In the formula:

[0019] P1 - differential pressure of the first stage, P1 = pressure before the stage - pressure between the stages. The data of the pressure before the stage comes from the pressure sensor before the stage, and the data of the pressure between the stages comes from the pressure sensor between the stages;

[0020] P2 - differential pressure of the second stage, P2 = pressure between the stages - pressure after the stage. The data of the pressure between the stages comes from the pressure sensor (10) between the stages, and the data of the pressure after the stage comes from the pressure sensor after the stage;

[0021] M1#1 - safety pressure of the reverse osmosis membrane module I;

[0022] M2#1 - warning pressure of the reverse osmosis membrane module I;

[0023] M3#1 - alarm pressure of the reverse osmosis membrane module I;

[0024] M1#2 - safety pressure of the reverse osmosis membrane module II;

[0025] M2#2 - warning pressure of the reverse osmosis membrane module II;

[0026] M3#2 - alarm pressure of the reverse osmosis membrane module II;

[0027] In cases 2 and 3, the starting time of the chemical dosing pump each time

[0028] In the formula:

[0029] Q-current water inlet flow obtained by the flow sensor;

[0030] Q0-rated inlet flow of water treatment plant;

[0031] 10 minutes is empirical data and should be adjusted according to the actual operation of the water plant equipment.

[0032] The utility model comprises three partitions: a low-concentration fungicide pool, a medium-concentration fungicide pool and a high-concentration fungicide pool, which can provide fungicides of different concentrations.

[0033] Furthermore, by installing flow and pressure sensors to monitor the reverse osmosis membrane's operating status in real time, a PLC controller automatically adjusts the biocide delivery concentration and timing based on changes in influent flow, first-stage differential pressure, and second-stage differential pressure, enabling real-time monitoring of biofilm contamination and automatic adjustment of biocide delivery volume. This effectively controls the formation and development of biofilms, thereby extending the life of the reverse osmosis membrane components and reducing cleaning frequency to address biofilm contamination. This improves water treatment efficiency, reduces chemical use, lowers labor costs, extends the life of the reverse osmosis membrane components, and reduces overall operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a system schematic diagram of an integrated reverse osmosis membrane assembly and an adaptive bactericide delivery device of the utility model.

[0035] Figure 2 This is a PLC control schematic diagram of a system integrating a reverse osmosis membrane assembly and an adaptive bactericide delivery device in the utility model.

[0036] Figure 3 Changes in pressure difference between the first-stage reverse osmosis sections in the power plant water treatment system before use.

[0037] Figure 4 During the experimental phase of this utility model, the pressure difference between the first-stage reverse osmosis sections of the power plant water treatment system was changed after use (two sets of equipment were randomly selected).

[0038] Among them: 1-flow sensor; 2-reagent tank; 3-dosing pump; 4-butterfly valve; 5-PLC controller (commercially available PLC model: Siemens S7-1200); 6-safety filter; 7-high-pressure pump; 8-pre-stage pressure sensor; 9-reverse osmosis membrane assembly I; 10-inter-stage pressure sensor; 11-reverse osmosis membrane assembly II; 12-post-stage pressure sensor. DETAILED DESCRIPTION

[0039] The following is a detailed description of the present invention in conjunction with the accompanying drawings, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figure 1 A system integrating a reverse osmosis membrane assembly and an adaptive biocide delivery device includes a security filter 6, a high-pressure pump 7, a reverse osmosis membrane assembly I9, and a reverse osmosis membrane assembly II11, which are sequentially connected by pipelines. A flow sensor 1 is provided in front of the security filter 6. A reagent tank 2 and a dosing pump 3 are also provided between the flow sensor 1 and the security filter 6. A pre-stage pressure sensor 8 is also provided between the high-pressure pump 7 and the reverse osmosis membrane assembly I9. An inter-stage pressure sensor 10 is also provided between the reverse osmosis membrane assembly I9 and the reverse osmosis membrane assembly II11. A post-stage pressure sensor 12 is also provided in the concentrate pipe of the reverse osmosis membrane assembly II11. The reagent tank 2 is divided into three areas: a low-concentration biocide tank 21, a medium-concentration biocide tank 22, and a high-concentration biocide tank 23, each containing low-concentration biocide, medium-concentration biocide, and high-concentration biocide, respectively. The three subareas are connected to the dosing pump 3 via a low-concentration biocide pipeline, a medium-concentration biocide pipeline, and a high-concentration biocide pipeline, respectively. The dosing pump 3 is mechanically connected to the butterfly valve 4 , and the PLC controller 5 can control the dosing pump 3 to connect to the low-concentration fungicide pipeline, the medium-concentration fungicide pipeline or the high-concentration fungicide pipeline of the reagent pool 2 .

[0041] The flow sensor 1 , the pre-stage pressure sensor 8 , the inter-stage pressure sensor 10 , and the post-stage pressure sensor 12 are all electrically connected to the PLC controller 5 .

[0042] In a system integrating a reverse osmosis membrane assembly and an adaptive bactericide delivery device of the utility model, the water to be treated flows through the security filter 6 and is pumped to the reverse osmosis membrane assembly I9 by the high-pressure pump 7. The treated fresh water enters the fresh water pipe, and the concentrated water flows into the reverse osmosis membrane assembly II11. After further treatment, the fresh water enters the fresh water pipe, and the concentrated water flows out for downstream treatment.

[0043] like Figure 2 The flow sensor 1, the pre-stage pressure sensor 8, the inter-stage pressure sensor 10, and the post-stage pressure sensor 12 transmit data to the PLC controller 5 every hour. The PLC controller 5 is responsible for summarizing and processing the data information returned by the flow, pre-stage pressure, inter-stage pressure, and post-stage pressure sensors, and making a judgment on the dosing pump 3 based on the data:

[0044] 1. Do not turn on the dosing pump 3.

[0045] ①P1 < M1#1, and P2 < M2#1.

[0046] 2. Start the chemical dosing pump 3, connect the pipeline of the low-concentration chemical agent pool, and adjust the opening time of the chemical dosing pump 3 according to the data.

[0047] ①M1#1 ≤ P1 ≤ M2#1, and M1#2 ≤ P2 ≤ M2#2.

[0048] 3. Start the chemical dosing pump 3, connect the pipeline of the high-concentration chemical agent pool, and adjust the opening time of the chemical dosing pump 3 according to the data.

[0049] ①M2#1 < P1 ≤ M3#1;

[0050] ②M2#2 < P2 ≤ M3#2.

[0051] 4. Alarm to remind membrane cleaning.

[0052] ①M3#1 < P1;

[0053] ②M3#2 < P2.

[0054] In the formula:

[0055] P1 - pressure difference of the first stage, P1 = pressure before the stage - pressure between the stages, the data of the pressure before the stage comes from the pressure sensor 8 before the stage, and the data of the pressure between the stages comes from the pressure sensor 10 between the stages;

[0056] P2 - pressure difference of the second stage, P2 = pressure between the stages - pressure after the stage, the data of the pressure between the stages comes from the pressure sensor 10 between the stages, and the data of the pressure after the stage comes from the pressure sensor 12 after the stage;

[0057] M1#1 - safety pressure of the reverse osmosis membrane module I 9;

[0058] M2#1 - warning pressure of the reverse osmosis membrane module I 9;

[0059] M3#1 - alarm pressure of the reverse osmosis membrane module I 9;

[0060] M1#2 - safety pressure of the reverse osmosis membrane module II 11;

[0061] M2#2 - warning pressure of the reverse osmosis membrane module II 11;

[0062] M3#2 - alarm pressure of the reverse osmosis membrane module II 11;

[0063] In cases 2 and 3, the opening time of the chemical dosing pump 3 each time

[0064] In the formula:

[0065] Q - current influent flow rate obtained by the flow sensor;

[0066] Q0-rated inlet flow of water treatment plant;

[0067] 10 minutes is empirical data and should be adjusted according to the actual operation of the water plant equipment.

[0068] Before the trial of the device in this application, the pressure difference between the first-stage reverse osmosis membranes basically kept rising, and the membrane had to be cleaned once every two weeks (such as Figure 3 ), the machine cannot work during cleaning, which wastes manpower, material resources and time, greatly affecting production capacity and efficiency.

[0069] After trying out the device in this application, two sets of devices were randomly selected for evaluation. Figure 4 Although the pressure difference between the sections of the first-stage reverse osmosis membrane fluctuates, it can be automatically adjusted, and there is no need to clean the membrane within a month, which saves a lot of manpower and material resources and generates considerable benefits.

Claims

1. A system integrating a reverse osmosis membrane assembly and an adaptive bactericide delivery device, comprising a security filter (6), a high-pressure pump (7), a reverse osmosis membrane assembly I (9) and a reverse osmosis membrane assembly II (11) connected in sequence through pipelines, a reagent tank (2) and a dosing pump (3) being provided in front of the security filter (6), characterized in that: The invention also includes a PLC controller (5), and the reagent pool (2) includes three partitions: a low-concentration fungicide reagent pool (21), a medium-concentration fungicide reagent pool (22), and a high-concentration fungicide reagent pool (23) filled with low-concentration fungicide, medium-concentration fungicide, and high-concentration fungicide respectively. The three partitions are connected to the dosing pump (3) through the low-concentration fungicide pipeline, the medium-concentration fungicide pipeline, and the high-concentration fungicide pipeline respectively. The dosing pump (3) is electrically connected to the PLC controller (5), and the PLC controller (5) controls the dosing pump (3) to connect the low-concentration fungicide pipeline, the medium-concentration fungicide pipeline, or the high-concentration fungicide pipeline of the reagent pool (2).

2. The system according to claim 1, wherein: A flow sensor (1) is provided in front of the safety filter (6); a pre-stage pressure sensor (8) is provided between the high-pressure pump (7) and the reverse osmosis membrane assembly I (9); an inter-stage pressure sensor (10) is provided between the reverse osmosis membrane assembly I (9) and the reverse osmosis membrane assembly II (11); and a post-stage pressure sensor (12) is provided on the concentrated water pipe of the reverse osmosis membrane assembly II (11). The flow sensor (1), the pre-stage pressure sensor (8), the inter-stage pressure sensor (10) and the post-stage pressure sensor (12) are all electrically connected to the PLC controller (5).

3. The system according to claim 2, wherein: The flow sensor (1), the pre-stage pressure sensor (8), the inter-stage pressure sensor (10) and the post-stage pressure sensor (12) transmit data back every hour. The PLC controller (5) summarizes and processes the data information transmitted by the flow, pre-stage pressure, inter-stage pressure and post-stage pressure sensors, and makes a judgment on whether the dosing pump (3) is connected to the low-concentration fungicide pipeline, the medium-concentration fungicide pipeline or the high-concentration fungicide pipeline of the reagent pool (2) according to the data, and adjusts the time.

4. The system according to claim 1, wherein: The dosing pump (3) is mechanically connected to a butterfly valve (4).

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