CN209803051U - High-reliability automatic cleaning PH online real-time monitoring system - Google Patents

Abstract

The utility model discloses an automatic PH cleaning online real-time monitoring system with high reliability, which comprises a sample separating device, a measuring pool, a fluid energizing device, a PH online monitor, a PH electrode, a control module and a filter; a sample of the feeding channel enters a measuring cell provided with a PH electrode through a sample separating device, and the measuring cell is connected with a fluid energizing device; the PH electrode is connected with a PH on-line monitor; the feeding channel is divided into a clear water channel and a medium channel, the front end of the clear water channel is provided with a clear water inlet, one path of the tail end of the clear water channel is connected with the fluid energizer through a pneumatic angle seat valve, and the other path of the tail end of the clear water channel is connected with the measuring tank through another pneumatic angle seat valve; the front end of the medium channel is provided with a medium inlet, and the tail end of the medium channel is connected with the measuring pool through a pneumatic angle seat valve; in operation, the cleaning water and the medium to be measured are alternately present in the measuring cell. The utility model discloses can solve traditional PH on-line monitoring system reliability not high, the electrode life-span is shorter, and the trouble is higher, and measured data lags behind and is difficult to technical problem such as long period normal operating in fact.

Description

High-reliability automatic cleaning PH online real-time monitoring system

Technical Field

The utility model belongs to the technical field of PH on-line monitoring, in particular to PH on-line monitoring technique of high reliability.

Background

PH measurement belongs to galvanic reactions, which convert chemical energy into electrical energy. PH measurement is a widely used process monitoring tool in the industrial field, and although it has been developed over the last century, liquid-filled glass electrodes are currently most commonly used. The main part of the glass electrode is a sensitive glass film and the inner conductor consists of an internal reference solution and an internal reference electrode. The electrical path for the potential formed by the glass electrode is mainly dependent on the micro-osmotic pressure of the reference solution in the electrode. When the electric channel is blocked, for example, the electrode is positioned in a high-pressure environment or the concentration of a medium to be measured is too high, the liquid supplement of the internal reference solution is not smooth, or bubbles exist, and the like, the external seepage of the internal reference solution is blocked, so that the measurement is not accurate; in another case, the medium to be measured reversely permeates into the internal reference solution, so that the internal reference solution is polluted and even generates chemical reaction, and then the internal reference electrode is damaged, and finally, the measurement error is increased and even the electrode fails.

At present, the PH on-line measuring system is used in working conditions with low electrode pollution, such as electroplating wastewater, pharmaceutical wastewater, printing and dyeing wastewater, papermaking wastewater, pure water and the like, by being limited by the principle and the manufacturing process of the PH electrode. In the high-temperature, high-pressure and high-pollution environment of petrochemical enterprises, on-line pH measurement is extremely difficult, and is mainly obtained by an off-line sampling measurement method at present. The PH electrode has a general service life of only 1-2 weeks or even days in the working condition of a petrochemical enterprise, and a single PH electrode is extremely easy to damage and pollute and has very low reliability.

In order to prolong the service life of the electrode, the most fundamental method is to improve the working environment of the electrode. The existing PH on-line monitor directly installs an electrode into a medium to be measured, and when the electrode is under severe working conditions of high pollution, high voltage, high concentration and the like, the electrode can quickly lose efficacy. If the working time of the electrode under severe conditions can be greatly shortened and the electrode is cleaned at regular time, the electrode can be effectively protected and the service life of the electrode can be prolonged. The manual cleaning can solve the problem, but under the high-temperature and high-pressure dangerous environment of a petrochemical plant, the electrode is dangerous to disassemble under pressure, and is easy to cause artificial damage, and the manual cleaning is not easy to realize due to the loss of manpower. Even if a self-cleaning system and a PH on-line monitoring system in the market are realized, all the PH on-line monitoring systems are detected individually, and when more important devices of the PH on-line monitoring system break down or are calibrated and maintained on site, the system cannot work normally, and the reliability of the system is not high.

In summary, the traditional PH on-line monitoring system has low reliability. The traditional PH value on-line monitoring system has the advantages that the service life of an electrode is short, the fault is high, the measured data is lagged, the corrosion control problem of an on-line detection instrument in a fault state is not considered in the traditional control system, the technology anticorrosion filling automatic control is completely carried out by depending on the on-line PH instrument, and the engineering is difficult to normally run for a long period in practice.

Disclosure of Invention

The utility model aims at providing an automatic PH online real-time monitoring system washs that reliability is high to it is not high to solve traditional PH online monitoring system reliability, and the electrode life-span is shorter, and the trouble is higher, and measured data lags behind and is difficult to technical problem such as long period normal operating in fact.

In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

A highly reliable automatic PH cleaning online real-time monitoring system mainly comprises a PH measuring system consisting of a sample separating device, a measuring pool, a fluid energizing device, a PH online monitor, a PH electrode, a control module and a filter; a sample of a feeding channel of the PH measuring system enters a measuring cell provided with a PH electrode through a sample separating device, one end of the measuring cell is connected with the feeding channel, and the other end of the measuring cell is connected with a fluid energizing device; the PH electrode is connected with a PH on-line monitor, and the PH on-line monitor is connected with the control module; the PH electrode and the measuring cell are installed in a static sealing mode; the feeding channel is divided into a clear water channel and a medium channel, a clear water inlet is arranged at the front end of the clear water channel, the clear water channel passes through a filter, one path of the tail end of the clear water channel is connected with the fluid energizing device through a pneumatic angle seat valve, and the other path of the tail end of the clear water channel is connected with the measuring pool through the other pneumatic angle seat valve; the front end of the medium channel is provided with a medium inlet, and the tail end of the medium channel is connected with a measuring pool through a filter and a pneumatic angle seat valve; the fluid energizing device is connected with the liquid outlet; the pneumatic angle seat valves are controlled by respective electromagnetic valves, and the electromagnetic valves are connected with the control module; when the device works, the control module controls the opening and closing of the corresponding pneumatic angle seat valve through the explosion-proof electromagnetic valve, so that the cleaning water and the medium to be measured alternately appear in the measuring pool.

The PH measurement systems connected in parallel form a standby dual-PH measurement system, and through the time sequence cooperation of all valves, when one PH electrode breaks down or one PH measurement pipeline and a pipe fitting are blocked, the system directly starts the other PH measurement system.

The fluid energizer consists of a jet or pump.

The pH values measured by the pH on-line monitor are respectively transmitted to the control module, and after the control module obtains the pH values, data are transmitted to the data server in an RS485 mode.

The utility model has the advantages that: the control module controls the on-off of the corresponding pneumatic angle seat valve through the explosion-proof solenoid valve, so that the cleaning water and the medium to be measured are alternately present in the measuring pool, when one PH electrode breaks down or one PH measuring pipeline and the pipe fitting are blocked, the system directly opens the other PH measuring system, and the high-reliability operation of the system is realized. The system has the advantages of double-path monitoring, automatic sampling, periodic data acquisition and PH electrode cleaning and maintenance. The utility model discloses stop the electrode pollution, reduce the electrode poisoning probability, reach the efficiency of online PH monitoring and extension PH electrode life-span. Additionally, the utility model discloses can effectual improvement whole equipment the reliability, also prolonged the life of equipment simultaneously.

Drawings

Fig. 1 is a schematic diagram of the system of the present invention.

The labels in the figure are: the device comprises a clean water inlet 1, a medium inlet 2, a liquid outlet 3, filters 4, 5, 6 and 7, electromagnetic valves 8, 9, 10, 11, 12 and 13, pneumatic angle seat valves 14, 15, 16, 17, 18 and 19, measuring tanks 20 and 21, pH electrodes 22 and 23, ejectors 24 and 25, pH on-line monitors 26 and 27 and control modules 28 and 29.

Detailed Description

The technical scheme of the utility model is that: the utility model provides an automatic clear PH online real-time monitoring system that reliability is high, mainly includes the parallelly connected binary channels that sample device, measuring cell, fluid energizing device, PH on-line monitoring appearance, PH electrode, control module and filter are constituteed. The system has the functions of automatically separating samples, sampling, measuring, cleaning and maintaining the electrodes, and outputs data in an RS485 communication mode. A sample of the feeding channel enters a measuring cell provided with a PH electrode through a sample separating device, one end of the measuring cell is connected with the feeding channel, and the other end of the measuring cell is connected with a fluid energizing device; the PH electrode is connected with a PH on-line monitor, and the PH on-line monitor is connected with the control module; the PH electrode and the measuring cell are installed in a static sealing mode. The feeding channel is divided into a clear water channel and a medium channel, a clear water inlet is arranged at the front end of the clear water channel, the clear water channel passes through a filter, one path of the tail end of the clear water channel is connected with the fluid energizing device through a pneumatic angle seat valve, and the other path of the tail end of the clear water channel is connected with the measuring pool through the other pneumatic angle seat valve; the fluid energizing device is connected with the liquid outlet; the front end of the medium channel is provided with a medium inlet, and the tail end of the medium channel is connected with a measuring pool through a filter and a pneumatic angle seat valve; the pneumatic angle seat valves are controlled by respective electromagnetic valves, and the electromagnetic valves are connected with the control module.

The utility model discloses the during operation, control module pass through the switch and the closure of the corresponding pneumatic angle seat valve of explosion-proof solenoid valve control, make washing water and the medium that awaits measuring appear in the measuring cell in turn to through the chronogenesis cooperation of each valve, when a PH electrode breaks down or a PH measures pipeline, pipe fitting are blockked up, another PH measurement system is directly opened to the system, realizes the high reliability operation of system. The system has the advantages of double-path monitoring, automatic sampling, periodic data acquisition and PH electrode cleaning and maintenance. The utility model discloses stop the electrode pollution, reduce the electrode poisoning probability, reach the efficiency of online PH monitoring and extension PH electrode life-span. In addition, the utility model discloses utilize the principle of "one with one and be equipped with", effectively fuse two self-cleaning PH, when PH equipment was maintained all the way, was washd, was markd again and equipment pipe fitting breaks down and is blockked up, another way PH monitoring system can continue to operate to provide real-time field data. The reliability of the whole equipment can be effectively improved, and the service life of the equipment is prolonged.

A specific embodiment of the present invention can be seen in fig. 1. The embodiment comprises the following steps: the device comprises a clean water inlet 1, a medium inlet 2, a liquid outlet 3, filters 4, 5, 6 and 7, electromagnetic valves 8, 9, 10, 11, 12 and 13, pneumatic angle seat valves 14, 15, 16, 17, 18 and 19, measuring tanks 20 and 21, pH electrodes 22 and 23, ejectors 24 and 25, pH on-line monitors 26 and 27 and control modules 28 and 29.

The fluid energizer may be composed of an ejector, a pump or other components capable of increasing the fluid kinetic energy, and the ejector 24 or 25 is selected in this embodiment. The pH electrodes 22 and 23 are respectively arranged in the measuring cells 20 and 21, meanwhile, the pH electrodes 22 and 23 are respectively connected with pH on-line monitors 26 and 27, and the pH on-line monitors 26 and 27 are respectively connected with control modules 28 and 29; the pneumatic angle seat valves 14, 15, 16, 17, 18 and 19 are respectively controlled by electromagnetic valves 8, 9, 10, 11, 12 and 13, wherein the electromagnetic valves 8, 9 and 10 are connected with a control module 28, and the electromagnetic valves 11, 12 and 13 are connected with a control module 29; the ejectors 24, 25 are also connected by a conduit to the liquid outlet 3 for discharge of medium or clear water.

When the device works, when the pneumatic angle seat valves 15 and 16 and the pneumatic angle seat valves 18 and 19 are opened, and the pneumatic angle seat valve 14 and the pneumatic angle seat valve 17 are closed, the clear water channel is communicated with the measuring tanks 20 and 21, the cleaning water is in the measuring tanks 20 and 21, the pH value is not measured, and the pH electrode is cleaned and protected at the moment; when the pneumatic angle seat valves 14 and 16, the pneumatic angle seat valves 17 and 19 are opened, and the pneumatic angle seat valve 15 and the pneumatic angle seat valve 18 are closed, the medium channel is communicated with the measuring pools 20 and 21, the media are in the measuring pools 20 and 21, the pH on-line monitors 26 and 27 start to measure the pH value through the pH electrodes 22 and 23 respectively, after the measurement is finished, the pneumatic angle seat valve 14 and the pneumatic angle seat valve 17 are closed, the pneumatic angle seat valve 15 and the pneumatic angle seat valve 18 are opened simultaneously, the pH electrodes 22 and 23 are respectively flushed, and after the measuring pools 20 and 21 are filled with cleaning water, all the pneumatic angle seat valves are closed. The pH values measured by the pH on-line monitors 26 and 27 are respectively transmitted to the on-line control modules 28 and 29. After the online control module obtains the pH value, data are transmitted to the data server in a 4-20 mA or RS485 mode.

Claims (4)

1. A high-reliability automatic cleaning PH online real-time monitoring system is characterized by mainly comprising a sample separation device, a measuring pool, a fluid energizing device, a PH online monitor, a PH electrode, a control module and a filter; a sample of a feeding channel of the PH measuring system enters a measuring cell provided with a PH electrode through a sample separating device, one end of the measuring cell is connected with the feeding channel, and the other end of the measuring cell is connected with a fluid energizing device; the PH electrode is connected with a PH on-line monitor, and the PH on-line monitor is connected with the control module; the PH electrode and the measuring cell are installed in a static sealing mode; the feeding channel is divided into a clear water channel and a medium channel, a clear water inlet is arranged at the front end of the clear water channel, the clear water channel passes through a filter, one path of the tail end of the clear water channel is connected with the fluid energizing device through a pneumatic angle seat valve, and the other path of the tail end of the clear water channel is connected with the measuring pool through the other pneumatic angle seat valve; the front end of the medium channel is provided with a medium inlet, and the tail end of the medium channel is connected with a measuring pool through a filter and a pneumatic angle seat valve; the fluid energizing device is connected with the liquid outlet; the pneumatic angle seat valves are controlled by respective electromagnetic valves, and the electromagnetic valves are connected with the control module; when the device works, the control module controls the opening and closing of the corresponding pneumatic angle seat valve through the explosion-proof electromagnetic valve, so that the cleaning water and the medium to be measured alternately appear in the measuring pool.

2. The on-line real-time PH monitoring system for automatic cleaning with high reliability as claimed in claim 1, wherein the dual PH measuring systems connected in parallel form a dual PH measuring system for standby use, and through the time sequence coordination of each valve, when one PH electrode is failed or one PH measuring pipeline and pipe are blocked, the system directly starts the other PH measuring system.

3. The on-line real-time PH monitoring system for automatic cleaning with high reliability as claimed in claim 1, wherein the fluid energizing device is composed of a jet device or a pump.

4. The automatic PH cleaning online real-time monitoring system with high reliability as claimed in claim 1, wherein the pH values measured by the online pH monitor are respectively transmitted to the control module, and after the control module obtains the pH values, the data are transmitted to the data server in an RS485 mode.