A multi-stage filtering system for acid-base liquid supply

Abstract

The utility model relates to a kind of multi-stage filtering system for acid-base liquid supply, including liquid inlet pipeline and liquid outlet pipeline;At least two liquid inlet branch pipelines independent of each other and in parallel are connected between liquid inlet pipeline and liquid outlet pipeline, and filter unit is provided on each liquid inlet branch pipeline;Filter unit includes at least two filter branch pipelines independent of each other and in parallel, and filter is installed on each filter branch pipeline, gas balance pipeline is connected with filter respectively through several air inlet branch pipelines, then filter is connected with emptying collection pipeline again through emptying branch pipeline.The utility model adopts two-stage parallel architecture of liquid inlet branch pipeline and filter branch pipeline, even if a certain liquid inlet branch pipeline or filter fails or is blocked, other parallel pipelines can still work, uninterrupted operation and online maintenance are realized, and system availability is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid transportation technology, and in particular to a multi-stage filtration system for supplying acid and alkali liquids. Background Technology

[0002] In the production and supply of organic liquids, filtration is often required to ensure the stability of subsequent processes (such as reaction and mixing) and product quality. Existing systems of this type typically suffer from the following problems: Its functions are relatively simple: it mainly focuses on liquid transportation and basic treatment (such as pressurization and simple filtration), and lacks the ability to adapt to complex working conditions (such as simultaneous treatment of different acid and alkali liquids and fine filtration).

[0003] Insufficient system flexibility: The fixed piping structure makes it difficult to flexibly configure or maintain different filter units online. When one filter needs maintenance, it may affect the operation of the entire system.

[0004] Limited monitoring and control capabilities: Although it may have basic monitoring points such as pressure, it lacks multi-point real-time monitoring of key liquid parameters (such as pH value, conductivity, and turbidity), and there is room for improvement in the degree of automation.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a multi-stage filtration system for acid and alkali liquid supply, making it more valuable for industrial applications. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a multi-stage filtration system for supplying acid and alkali liquids.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage filtration system for supplying acid and alkali liquids includes an inlet pipe and an outlet pipe. At least two independent and parallel inlet branch pipes are connected between the inlet pipe and the outlet pipe, and a filter unit is installed on each inlet branch pipe. The filtration unit includes at least two independent and parallel filtration branch lines, each of which is equipped with a filter. The gas balance line is connected to the filter through several intake branch lines, and the filter is then connected to the exhaust manifold through an exhaust branch line.

[0008] As a further improvement of this utility model, a detection branch pipe is installed on the liquid inlet branch pipe at the front end of the filter unit.

[0009] As a further improvement of this utility model, a detection branch pipe is installed on the liquid inlet branch pipe at the rear end of the filter unit.

[0010] As a further improvement of this utility model, a sensor unit is installed on the detection branch pipe. The sensor unit includes, but is not limited to, one or more combinations of temperature sensor, flow sensor, pressure sensor, pH sensor, conductivity sensor and turbidity sensor.

[0011] As a further improvement of this utility model, the gas balance pipeline is connected to an external gas generating device, and a pressure sensor is installed on the gas balance pipeline.

[0012] As a further improvement of this utility model, the gas generating device is a nitrogen generating device.

[0013] As a further improvement of this utility model, an air venting silencer is installed on the air venting collection pipeline.

[0014] As a further improvement of this utility model, it also includes a backwashing pipeline connected to the filter branch pipeline for backwashing the filter.

[0015] As a further improvement of this utility model, the filter is one of a bag filter, a cartridge filter, or a membrane filter.

[0016] As a further improvement of this utility model, automatic valves are installed on the inlet pipe, outlet pipe, inlet branch pipe, filter branch pipe, gas balance pipe, vent branch pipe, vent collection pipe and detection branch pipe respectively.

[0017] By means of the above solution, this utility model has at least the following advantages: This invention adopts a two-stage parallel architecture of liquid inlet branch pipeline and filter branch pipeline. Even if one of the liquid inlet branch pipelines or filters fails or becomes blocked, the other parallel pipelines can continue to work, realizing uninterrupted operation and online maintenance, and significantly improving system availability.

[0018] The multi-parallel design of this invention ensures that a single point of failure does not affect the overall operation of the system, enabling maintenance without shutting down.

[0019] This invention features a detection branch line equipped with various sensors, including those for temperature, pressure, pH, conductivity, and turbidity. Combined with a pressure sensor on the gas balance line, it can balance and regulate system pressure, ensuring balanced flow rates for each filter and optimizing filtration performance.

[0020] This utility model features a comprehensive gas protection system and a centralized venting design with noise reduction, which improves operational safety and environmental friendliness.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a multi-stage filtration system for supplying acid and alkali liquids according to this utility model; Figure 2 yes Figure 1 A schematic diagram of the structure of the filter unit.

[0024] The meanings of the labels in the figures are as follows.

[0025] Liquid inlet pipe 1, liquid outlet pipe 2, liquid inlet branch pipe 3, filter unit 4, filter branch pipe 5, filter 6, gas balance pipe 7, air inlet branch pipe 8, vent branch pipe 9, vent summary pipe 10, detection branch pipe 11. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] The first embodiment of this utility model: like Figures 1-2 As shown in this embodiment A multi-stage filtration system for supplying acid and alkali liquids includes an inlet pipe 1 and an outlet pipe 2. At least two independent and parallel inlet branch pipes 3 are connected between the inlet pipe 1 and the outlet pipe 2. A filtration unit 4 is provided on each inlet branch pipe 3.

[0029] The filter unit 4 includes at least two independent and parallel filter branch pipes 5. A filter 6 is installed on each filter branch pipe 5. The gas balance pipe 7 is connected to the filter 6 through several air inlet branch pipes 8. Then the filter 6 is connected to the air outlet manifold 10 through the air outlet branch pipe 9. An air outlet silencer is installed on the air outlet manifold 10.

[0030] A detection branch pipe 11 is installed on the liquid inlet branch pipe 3 at the front end of the filter unit 4, and a detection branch pipe 11 is installed on the liquid inlet branch pipe 3 at the rear end of the filter unit 4.

[0031] A sensor unit is installed on the detection branch pipe 11. The sensor unit includes, but is not limited to, one or more combinations of temperature sensor, flow sensor, pressure sensor, pH sensor, conductivity sensor and turbidity sensor.

[0032] The gas balance line 7 is connected to an external gas generator, and a pressure sensor is installed on the gas balance line 7. The gas generator is a nitrogen generator.

[0033] The filter 6 is one of a bag filter, a cartridge filter, or a membrane filter. It also includes a backwashing line connected to the filter branch line 5 for backwashing the filter 6.

[0034] Automatic valves are installed on the inlet pipe 1, outlet pipe 2, inlet branch pipe 3, filter branch pipe 5, gas balance pipe 7, vent branch pipe 9, vent collection pipe 10, and detection branch pipe 11, respectively.

[0035] The improvements in this embodiment are summarized above: Parallel redundant flow path design: At least two independent and parallel inlet branch lines 3 are connected between the inlet line 1 and the outlet line 2. Each inlet branch line 3 is equipped with a filter unit 4. Each filter unit 4 includes at least two independent and parallel filter branch lines 5, and each filter branch line 5 is equipped with a filter 6. This dual parallel design at the system level and unit level constitutes the core redundancy architecture of the system.

[0036] Gas balancing and venting system: The gas balancing line 7 is connected to the top or appropriate location of each filter 6 via several inlet branch lines 8. The exhaust or drain ports of the filters 6 are connected to the venting manifold 10 via venting branch lines 9. The gas balancing line 7 is connected to an external gas generating device (such as a nitrogen generator) and may be equipped with a pressure sensor and regulating valve to maintain system pressure stability or create an inert environment.

[0037] Comprehensive online monitoring: Detection branch pipes 11 are installed on the inlet and outlet branch pipes 3 of the filter unit 4. Sensor units can be installed on the detection branch pipes 11, including but not limited to one or more of the following: temperature sensor, flow sensor, pressure sensor, pH sensor, conductivity sensor, and turbidity sensor, to achieve multi-point real-time monitoring of the liquid's physicochemical properties.

[0038] Automated control and execution: Automatic valves (such as pneumatic ball valves, solenoid valves, etc.) are installed at key nodes on the inlet pipeline 1, outlet pipeline 2, inlet branch pipeline 3, filter branch pipeline 5, gas balance pipeline 7, vent branch pipeline 9, vent collection pipeline 10, and detection branch pipeline 11. These valves, together with the sensor units, are connected to the central control system to realize the automated operation and remote control of the system.

[0039] Other auxiliary functional units: Backwash line: Connected to filter branch line 5, the medium flow direction is opposite to normal filtration, used to backwash filter 6 to remove filter cake or blockage.

[0040] Exhaust muffler: Installed at the end of the exhaust manifold 10 to reduce exhaust noise.

[0041] Filter type: Filter 6 can be selected from bag filters, cartridge filters or membrane filters, etc., depending on the characteristics of the liquid being processed.

[0042] The second embodiment of this utility model: like Figures 1-2 As shown, a multi-stage filtration system for supplying acid and alkali liquids in this embodiment mainly includes: Inlet pipe 1 and outlet pipe 2: made of acid and alkali resistant PVDF or stainless steel.

[0043] Inlet branch line 3: Two lines are set up, one line is online and the other line is on standby or used to divert liquids of different properties.

[0044] Filter unit 4 and filter branch lines 5: Each filter unit contains two filter branch lines. Filter 6 is a precision cartridge filter with a PTFE membrane, with an accuracy of up to 1μm.

[0045] Gas balance line 7: Connects to the nitrogen generator to maintain a slight positive pressure in the system and prevent air from entering.

[0046] Testing branch line 11: The inlet sensor monitors the pH, turbidity, and flow rate of the raw liquid; the outlet sensor monitors the pH and conductivity of the filtered liquid to ensure quality.

[0047] Automatic valves: Pneumatic diaphragm valves are used and can be controlled by PLC.

[0048] Backwashing line: Connect to a clean water or dedicated cleaning agent storage tank.

[0049] Drainage manifold 10: A stainless steel venting silencer is installed at the end.

[0050] A brief description of the working process of this embodiment: Normal filtration process: The acidic etching solution enters the system through the inlet pipe 1. The PLC controls the automatic valve to ensure that the liquid mainly enters its corresponding filter unit 4 through the first inlet branch pipe 3.

[0051] Within this filtration unit, liquid passes in parallel through filters 6 on two filtration branch pipes 5, solid particles are trapped, and the clean filtrate flows into the outlet pipe 2 and is sent to the point of use.

[0052] During the process, sensors at the inlet and outlet monitor data in real time and feed it back to the PLC. Gas balance pipeline 7 continuously supplies a trace amount of nitrogen.

[0053] Online switchover and maintenance process: When the pressure difference between the inlet and outlet of a certain filter 6 is too high (judged by a pressure sensor) or the filtration time reaches the set value, the PLC can automatically start the switching program.

[0054] Open the valves of the backup liquid inlet branch line 3 and the filter unit 4, and at the same time close the inlet and outlet valves of the unit to be maintained to achieve a seamless switching of the flow path.

[0055] For filter 6 that requires maintenance, the PLC can start the backwashing program: close its normal inlet and outlet valves, open the backwashing pipeline valve and the drain valve, use the reverse flow of cleaning medium to flush the filter element, and discharge the dirt through the drain pipeline.

[0056] Emptying process: When the system is shut down, maintained, or backwashed, the waste gas and waste liquid collected by each vent branch pipe 9 are merged into the vent collection pipe 10. After being reduced in noise by the vent silencer, they are safely discharged to the waste gas treatment system or waste liquid collection tank.

[0057] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-stage filtration system for supplying acid and alkali liquids, comprising an inlet pipe (1) and an outlet pipe (2). Its features are: At least two independent and parallel inlet branch pipes (3) are connected between the inlet pipe (1) and the outlet pipe (2), and a filter unit (4) is provided on each of the inlet branch pipes (3). The filter unit (4) includes at least two independent and parallel filter branch pipes (5), and a filter (6) is installed on each filter branch pipe (5). The gas balance pipe (7) is connected to the filter (6) through several air inlet branch pipes (8), and then the filter (6) is connected to the exhaust collection pipe (10) through the exhaust branch pipe (9).

2. The multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, A detection branch pipe (11) is installed on the liquid inlet branch pipe (3) at the front end of the filter unit (4).

3. The multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, A detection branch pipe (11) is installed on the liquid inlet branch pipe (3) at the rear end of the filter unit (4).

4. A multi-stage filtration system for supplying acid and alkali liquids as described in any one of claims 2 and 3, characterized in that, The detection branch pipe (11) is equipped with a sensor unit, which includes, but is not limited to, one or more combinations of temperature sensor, flow sensor, pressure sensor, pH sensor, conductivity sensor and turbidity sensor.

5. A multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, The gas balance pipeline (7) is connected to an external gas generating device, and a pressure sensor is installed on the gas balance pipeline (7).

6. The multi-stage filtration system for supplying acid and alkali liquids as described in claim 5, characterized in that, The gas generating device is a nitrogen generating device.

7. The multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, An air vent silencer is installed on the air venting manifold (10).

8. The multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, It also includes a backwashing pipeline connected to the filter branch pipeline (5) for backwashing the filter (6).

9. A multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, The filter (6) is one of a bag filter, a cartridge filter, or a membrane filter.

10. A multi-stage filtration system for supplying acid and alkali liquids as described in claim 1, characterized in that, Automatic valves are installed on the inlet pipe (1), outlet pipe (2), inlet branch pipe (3), filter branch pipe (5), gas balance pipe (7), vent branch pipe (9), vent collection pipe (10) and detection branch pipe (11).

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