Alkali dissolving and washing pump with PH value monitoring function

Abstract

The utility model discloses a kind of to have the function of monitoring PH value of dissolving alkali washing pump, including basic pump body system, PH monitoring system, mixed adjustment system and circulation buffer system;The basic pump body system includes pump shell, impeller, driving device and import-export pipeline interface, the impeller is arranged in the inside of pump shell, the driving device is connected with impeller and drives its rotation, the import-export pipeline interface is respectively arranged in the two sides of pump shell.The utility model is by setting PH sensor at export pipeline interface, and is matched with signal transmission module and display and data recording unit, realizes the real-time, accurate monitoring of dissolving alkali solution PH value.Operating personnel can obtain solution acidity and alkalinity data at any time, timely adjust according to production demand, effectively avoid product quality problem, chemical reaction anomaly and environmental protection risk caused by PH value deviation, significantly improve the controllability and stability of production process.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport and processing equipment technology, and in particular to a alkali-dissolving washing pump with pH value monitoring function. Background Technology

[0002] Alkali-dissolving washing pumps, as crucial fluid transport and processing equipment in industrial production, are widely used in numerous fields such as chemical engineering, environmental protection, and dyeing and printing. In chemical production processes, they play a vital role in precisely delivering alkaline solutions to reaction devices, ensuring that various chemical reactions can proceed efficiently in a suitable alkaline environment. In the environmental protection field, they can be used in the alkali treatment process of wastewater, helping to adjust the pH of the wastewater and laying the foundation for subsequent purification processes. In the dyeing and printing industry, they participate in the pretreatment stage of fabrics, using alkaline solutions to remove impurities and oil stains from the fabric surface, ensuring the dyeing and printing effect. Through the stable and efficient transport and processing of alkaline solutions, alkali-dissolving washing pumps play a key role in maintaining the continuity of production processes, improving product quality, and ensuring compliance with environmental standards.

[0003] The existing alkali-dissolving washing pump technology system faces several pressing problems. From a monitoring perspective, most traditional alkali-dissolving washing pumps lack real-time, accurate monitoring of the pH value of the delivered solution. This results in the inability to detect subtle changes in solution acidity or alkalinity during production. Once the solution pH deviates from the optimal range, it not only reduces chemical reaction efficiency but may also lead to product quality defects and even serious consequences such as non-compliance with emission standards in environmental treatment scenarios. Regarding mixing and adjustment, existing technologies suffer from poor mixing uniformity and slow adjustment response. When adjustments to the concentration or composition of the alkali-dissolving solution are needed, it is difficult to quickly and uniformly mix the new component with the existing solution, affecting production rhythm and product quality. In terms of the circulation buffer system, some equipment lacks sufficient circulation stability and buffering capacity. When faced with flow fluctuations, it cannot effectively maintain stable system operation, easily leading to unstable pipeline pressure, increasing the risk of equipment failure, and reducing production reliability and continuity. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a alkali-dissolving washing pump with pH monitoring function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pH-monitoring alkali-dissolving washing pump includes a basic pump body system, a pH monitoring system, a mixing and regulating system, and a circulation buffer system. The basic pump body system includes a pump casing, an impeller, a drive unit, and inlet / outlet pipe interfaces. The impeller is located inside the pump casing, and the drive unit is connected to and drives the impeller to rotate. The inlet / outlet pipe interfaces are located on opposite sides of the pump casing. The pH monitoring system includes a pH sensor, a signal transmission module, and a display and data recording unit. The pH sensor is located at the outlet pipe interface and is connected to the display and data recording unit via the signal transmission module. The mixing and regulating system includes a static mixer, a metering pump, and a regulating branch. The static mixer is located on the inlet pipe interface, and the regulating branch is connected to the inlet pipe interface via the metering pump, with the connection point located upstream of the static mixer. The circulation buffer system includes a circulation tank and circulation pipes. The circulation tank is connected to both the outlet and inlet pipe interfaces via circulation pipes.

[0007] Preferably, the pump casing and impeller are made of alkali-resistant materials, such as stainless steel or engineering plastics.

[0008] Preferably, the pH monitoring system further includes a temperature compensation module, which is connected to the pH sensor and is used to perform temperature compensation on the pH measurement value.

[0009] Preferably, the mixing and regulating system further includes a buffer mixing chamber, which is disposed on the pipeline at the outlet pipe interface, and is equipped with stirring blades.

[0010] Preferably, the driving device is a motor, and the power of the motor can be adjusted according to the flow rate requirement.

[0011] Preferably, a filter device is also provided on the pipeline of the inlet pipe interface, and the filter device is located upstream of the connection point between the regulating branch and the inlet pipe interface.

[0012] The beneficial effects of this utility model are:

[0013] 1. By installing a pH sensor at the outlet pipe interface, along with a signal transmission module and display and data recording unit, real-time and accurate monitoring of the pH value of the alkali solution is achieved. Operators can obtain the solution's acidity and alkalinity data at any time and adjust it promptly according to production needs, effectively avoiding product quality problems, abnormal chemical reactions, and environmental risks caused by pH deviations, significantly improving the controllability and stability of the production process.

[0014] 2. The static mixer works in conjunction with the metering pump, and the regulating branch precisely inputs the regulating medium, enabling rapid and uniform mixing and adjustment of the alkali solution. It can respond quickly to frequent adjustments to solution composition and concentration during production processes, ensuring mixing effectiveness, improving production efficiency, and meeting diverse production needs.

[0015] 3. The circulation buffer system constructed by the circulation tank and circulation pipeline can effectively buffer flow fluctuations and stabilize pipeline pressure. During the operation of the alkali washing pump, even in the face of instantaneous changes in flow, the system can maintain stability, reduce the probability of equipment failure due to unstable pressure, extend equipment service life, and ensure the continuity and reliability of production.

[0016] 4. The filter device installed upstream of the inlet pipe interface can effectively intercept impurities, prevent them from entering the pump body and subsequent systems, reduce equipment wear, ensure smooth system operation, and reduce the risk of equipment failure caused by impurity blockage. Attached Figure Description

[0017] Figure 1 The basic pump system and pH monitoring system;

[0018] Figure 2 It is based on the pump body system and the mixing and regulating system;

[0019] Figure 3 It is the basic pump system and the circulating buffer system. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A alkali-dissolving washing pump with pH monitoring function is characterized by comprising a basic pump body system, a pH monitoring system, a mixing and regulating system, and a circulating buffer system. Each system forms a closed-loop control system through fluid pipelines and signal links. The basic pump body system is the core power unit, the pH monitoring system is the parameter sensing unit, the mixing and regulating system is the execution and regulating unit, and the circulating buffer system is the dynamic balancing unit. The four systems work together to achieve stable delivery and quality control of alkaline solutions.

[0022] The basic pump system includes a pump casing, impeller, drive unit, and inlet / outlet pipe interfaces. The impeller is located inside the pump casing, and the drive unit is connected to and drives the impeller to rotate. The inlet / outlet pipe interfaces are located on both sides of the pump casing. The pump casing adopts a volute structure, and its hydraulic model is optimized by CFD flow field simulation. The gap between the impeller and the inner wall of the pump casing is controlled at 0.1-0.3mm to reduce volumetric loss. The output shaft of the drive unit is connected to the impeller shaft through a rigid coupling, with a coaxiality error not exceeding 0.05mm. The inlet / outlet pipe interfaces adopt a flange connection, and the flange sealing surface has a tongue and groove structure, with matching nitrile rubber sealing rings to achieve media sealing.

[0023] The pH monitoring system includes a pH sensor, a signal transmission module, and a display and data recording unit. The pH sensor is installed at the outlet pipe interface and is connected to the display and data recording unit via the signal transmission module. The pH sensor adopts a glass electrode structure, with a measurement range covering 0-14 pH, an accuracy of ±0.01 pH, and a response time ≤2s. The signal transmission module has a built-in signal amplification circuit and an A / D converter, which converts the sensor's mV-level signal into a 4-20mA standard current signal. The display and data recording unit is equipped with a 7-inch touch screen, supporting real-time data refresh (refresh rate 1Hz) and historical data query, with a data storage capacity of no less than 16GB.

[0024] The mixing and regulating system includes a static mixer, a metering pump, and a regulating branch. The static mixer is installed on the pipeline at the inlet pipe interface. The regulating branch is connected to the pipeline at the inlet pipe interface via the metering pump, with the connection point located upstream of the static mixer. The static mixer adopts an SK-type unit combination structure, with each mixing unit having a length 10 times the pipe diameter and built-in left-hand and right-hand alternating helical blades. The metering pump has a plunger-type structure with a flow regulation ratio of 1:10 and a repeatability of ≤±0.5%. The regulating branch is made of 316L stainless steel, with a pipe diameter matching the rated flow of the metering pump, and a one-way valve is installed on the pipeline to prevent media backflow.

[0025] The circulating buffer system includes a circulating tank and circulating pipelines. The circulating tank is connected to both the outlet and inlet pipe interfaces via the circulating pipelines. The effective volume of the circulating tank is 1.5 times the rated flow rate of the pump. The bottom of the tank has a conical structure for easy drainage, and the top is equipped with a breather valve to balance the air pressure. The flow velocity in the circulating pipeline is controlled between 1.5 and 2.5 m / s. The pipeline is equipped with a manual regulating valve and an electromagnetic flow meter, which can achieve 0-100% range adjustment of the circulating flow rate.

[0026] The pump casing and impeller are made of alkali-resistant materials, which are stainless steel or engineering plastics. When conveying NaOH solutions with a concentration ≤20%, 316 stainless steel (containing 2-3% molybdenum) is selected; when conveying alkaline solutions containing fluorides, polyvinylidene fluoride (PVDF) engineering plastic is selected, with a temperature resistance range of -40℃ to 120℃ and a tensile strength ≥35MPa.

[0027] The pH monitoring system also includes a temperature compensation module, which is connected to the pH sensor and used to compensate for the pH measurement value due to temperature. The temperature compensation module integrates a Pt100 platinum resistance temperature sensor with a measurement range of 0-100℃ and an accuracy of ±0.1℃. Through a built-in Nernst equation temperature correction algorithm, it automatically compensates for the effect of temperature on the slope of the pH electrode, ensuring that the measurement error is ≤±0.02pH within the range of 5-60℃.

[0028] The mixing and regulating system also includes a buffer mixing chamber, which is installed on the pipeline at the outlet pipe interface. The buffer mixing chamber contains stirring blades. The volume of the buffer mixing chamber is five times the volume of the pipeline. The stirring blades are three-bladed propellers, installed at a height of one-third of the inner diameter of the chamber, and have an adjustable rotation speed range of 50-300 rpm. The chamber is equipped with four baffles (at a 45° angle to the axis), which can increase the Reynolds number to 10. 4 The above results in turbulent mixing.

[0029] The drive unit is a motor, and the power of the motor can be adjusted according to the flow demand. The drive unit adopts a YE3 series high-efficiency three-phase asynchronous motor, and the energy efficiency level meets the GB18613-2020 Class II standard; it is equipped with a vector frequency converter to achieve stepless speed regulation from 0-50Hz, with a speed regulation accuracy of ±0.5% of the rated speed, and realizes closed-loop speed regulation control by receiving 4-20mA flow signals.

[0030] A filter device is also installed on the inlet pipe interface, located upstream of the connection point between the regulating branch and the inlet pipe interface. The filter device has a basket structure, and the filter screen material is the same as that of the pipe. The filtration accuracy can be selected as 50 mesh, 100 mesh, or 200 mesh. A differential pressure transmitter is installed to monitor the pressure difference before and after the filter screen. When the pressure difference is ≥0.1MPa, an alarm signal is output. The filter screen adopts a quick-opening structure design, and the replacement time is ≤5 minutes.

[0031] When this alkali-dissolving washing pump is in operation, the drive unit (motor) of the basic pump system drives the impeller to rotate at high speed inside the pump casing, generating a strong suction force. The alkali-dissolving solution is drawn into the pump casing through the inlet pipe interface, and then the centrifugal force generated by the high-speed rotation of the impeller forces the solution out from the outlet pipe interface. During solution output, the pH monitoring system begins to function. The pH sensor at the outlet pipe interface detects the pH value of the solution in real time and transmits the data to the display and data recording unit via a signal transmission module, providing operators with intuitive pH data. If the pH value becomes abnormal, this signal is fed back to the mixing and adjustment system. In the mixing and adjustment system, the medium in the adjustment branch is precisely metered by the metering pump and then enters the static mixer to fully mix with the alkali-dissolving solution from the inlet pipe interface, thereby adjusting the composition and concentration of the solution. The circulation buffer system operates continuously. A portion of the solution flowing out from the outlet pipe interface enters the circulation tank and then flows back to the inlet pipe interface through the circulation pipeline, buffering flow fluctuations and stabilizing pressure. This ensures that the entire alkali-dissolving washing pump system can operate continuously in a stable and efficient state, meeting the stringent requirements of various industrial production processes for alkali-dissolving solution processing.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A alkali-dissolving washing pump with pH monitoring function, characterized in that, The system comprises a basic pump body system, a pH monitoring system, a mixing and regulating system, and a circulation buffer system. The basic pump body system includes a pump casing, an impeller, a drive unit, and inlet / outlet pipe interfaces. The impeller is located inside the pump casing, and the drive unit is connected to and drives the impeller to rotate. The inlet / outlet pipe interfaces are located on opposite sides of the pump casing. The pH monitoring system includes a pH sensor, a signal transmission module, and a display and data recording unit. The pH sensor is located at the outlet pipe interface and is connected to the display and data recording unit via the signal transmission module. The mixing and regulating system includes a static mixer, a metering pump, and a regulating branch. The static mixer is located on the inlet pipe interface, and the regulating branch is connected to the inlet pipe interface via the metering pump, with the connection point upstream of the static mixer. The circulation buffer system includes a circulation tank and circulation pipes. The circulation tank is connected to both the outlet and inlet pipe interfaces via circulation pipes.

2. The alkali-dissolving washing pump with pH monitoring function according to claim 1, characterized in that, The pump casing and impeller are made of alkali-resistant corrosion-resistant materials, which are stainless steel or engineering plastics.

3. The alkali-dissolving washing pump with pH monitoring function according to claim 1, characterized in that, The pH monitoring system also includes a temperature compensation module, which is connected to the pH sensor and is used to compensate the pH measurement value for temperature.

4. The alkali-dissolving washing pump with pH monitoring function according to claim 1, characterized in that, The mixing and regulating system also includes a buffer mixing chamber, which is located on the pipeline at the outlet pipe interface and is equipped with stirring blades.

5. A alkali-dissolving washing pump with pH monitoring function according to claim 1, characterized in that, The driving device is a motor, and the power of the motor can be adjusted according to the flow rate requirement.

6. A alkali-dissolving washing pump with pH monitoring function according to claim 1, characterized in that, A filter device is also installed on the pipeline of the inlet pipe interface, and the filter device is located upstream of the connection point between the regulating branch and the inlet pipe interface.

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