Desulfurizing absorption tower pH measuring device
By setting up a flow outlet and introduction tube at the bottom of the desulfurization absorption tower, the slurry flows naturally to the pH electrode measurement cell, which solves the problem that the existing pH measurement device cannot take samples uninterrupted for 24 hours and has high power consumption, achieving high accuracy and long electrode life.
Patent Information
- Application Number
- CN202420820174.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In the existing flue gas wet desulfurization treatment, the pH measuring device cannot take samples uninterruptedly for 24 hours, with high power consumption, short service life of the pH electrode, and high error in the manual sampling system.
A pH measuring device for desulfurization absorption tower is designed. By setting a flow outlet and introduction tube at the bottom of the desulfurization absorption tower, the slurry flows naturally to the pH electrode measuring cell, achieving uninterrupted sampling for 24 hours, and controlling the liquid level and flow rate through the diaphragm valve to reduce power consumption and electrode impact.
24-hour uninterrupted sampling is achieved, which reduces power consumption, extends the service life of the pH electrode, and eliminates system errors caused by manual sampling, improving measurement accuracy.
Smart Images
Figure CN222618547U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wet flue gas desulfurization treatment, and in particular to a pH measuring device for a desulfurization absorption tower. Background Art
[0002] The wet limestone / gypsum desulfurization device is a common flue gas desulfurization equipment currently used in domestic thermal power plants. Its advantages are high desulfurization efficiency, stable operation, and high adaptability to coal types. The pH measurement of the slurry in the absorption tower is a key link in the wet flue gas desulfurization treatment process of thermal power plants. The accuracy of its measurement is particularly important. The unstable pH value of the slurry or the unreasonable operating range will cause a series of adverse effects such as scaling, corrosion, and poor gypsum quality.
[0003] The current pH measurement scheme for the absorption tower is: add a branch pipe to the outlet pipe of the gypsum discharge pump at the bottom of the absorption tower and introduce it into the absorption tower. Install two pH electrodes on the horizontal section of the branch pipe, and use the outlet pressure of the discharge pump to supply the absorption tower slurry to the pH measurement device. After the measurement is completed, it is sent to the absorption tower. Only when the gypsum discharge pump is running can the real-time measurement accuracy of the slurry be guaranteed.
[0004] However, in the prior art, the outlet pressure of the discharge pump is relatively high, and the slurry flows at a relatively fast speed. The fine suspended matter and solid crystals in the slurry have a relatively large impact on the glass bulb measuring element of the pH electrode, which can easily damage the electrode and shorten its service life. In addition, in order to ensure continuous and real-time measurement of the pH value, the discharge pump needs to run uninterruptedly, which consumes a lot of energy. In addition, the discharge pump needs to be shut down when calibrating a single electrode, causing both pH electrodes to fail to work and unable to continuously monitor the pH value of the slurry. At the same time, when the desulfurization system is operating normally, a portable pH meter is required to manually compare the pH value of the gypsum slurry every day. The temperature difference between the slurry sample taken from the outlet pipe of the discharge pump and the slurry in the pipe is more than 10 degrees Celsius, which will cause systematic errors in manual comparison and automatic measurement, which cannot be eliminated. Summary of the invention
[0005] In order to solve the problems that the existing pH measuring device cannot sample continuously for 24 hours, has high power consumption, short service life of the pH electrode, and high error of the manual sampling system, the present application provides a desulfurization absorption tower pH measuring device.
[0006] To achieve the purpose of this application, this application provides the following technical solutions:
[0007] A desulfurization absorption tower pH measurement device, comprising: a desulfurization absorption tower and a pH electrode measurement cell, wherein the desulfurization absorption tower is connected to the pH battery measurement cell through an introduction pipe;
[0008] A pH electrode is provided in the pH battery measuring cell, and the pH electrode is fixed on the top of the pH electrode measuring cell and inserted into the slurry of the pH electrode measuring cell;
[0009] The bottom wall of the desulfurization absorption tower is provided with an outflow port, and the inlet pipe is obliquely led downward from the outflow port into the inlet port on one side wall of the pH battery measuring cell;
[0010] The level of the outflow port is higher than the inlet port;
[0011] The other side wall of the pH battery measuring cell is provided with an overflow port.
[0012] In a possible implementation manner, the overflow port is communicated with an overflow pipe, the overflow pipe leads to a drainage ditch, and the overflow pipe is an L-shaped pipe.
[0013] In a possible implementation manner, the measuring height of the pH electrode is lower than the overflow port, and the level of the overflow port is higher than the introduction port.
[0014] In a possible implementation manner, a measuring height of the pH electrode is higher than the introduction port.
[0015] In a possible implementation manner, a first diaphragm valve is provided on the overflow pipe, and a second diaphragm valve is provided on the inlet pipe;
[0016] The first diaphragm valve and the second diaphragm valve are both connected by flanges.
[0017] In a possible implementation manner, the outflow outlet has a height of 1 m.
[0018] Furthermore, the outlet is selected at a position where the liquid flowability on the side wall of the desulfurization absorption tower is good, the position is at an appropriate distance from the limestone slurry replenishment point of the desulfurization absorption tower and can fully react with the slurry, and a hole is opened.
[0019] In a possible implementation, a pH meter box is installed at zero meters from the bottom of the desulfurization absorption tower.
[0020] In a possible implementation, the pH electrode measuring cell is made of a semi-closed structure and anti-corrosion material.
[0021] In a possible implementation, a measuring hole is reserved on the top of the pH electrode measuring cell, and an online pH meter or a portable pH meter for manual analysis is installed in the measuring hole.
[0022] The beneficial effects of this application are:
[0023] The present application not only realizes 24-hour uninterrupted sampling without generating unnecessary power consumption, avoids the erosion and wear of the pH electrode glass bulb caused by the high outlet pressure of the gypsum removal pump, and prolongs the service life of the electrode, but also realizes the consistency of time, space, and temperature between manual sampling and system automatic sampling, eliminates system errors, and ensures the accuracy of measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.
[0025] Figure 1 A schematic diagram of the structure of a desulfurization absorption tower pH measurement device provided in an embodiment of the present application;
[0026] Among them, 1-desulfurization absorption tower, 2-outlet, 3-inlet pipe, 4-inlet, 5-pH electrode measurement tank, 6-pH electrode, 7-overflow port, 8-overflow pipe, 9-first diaphragm valve, 10-drainage ditch, 11-second diaphragm valve. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.
[0029] Example 1
[0030] See also Figure 1 , Figure 1 The structure diagram of the desulfurization absorption tower pH measuring device provided in the embodiment of the present application, the desulfurization absorption tower pH measuring device comprises: a desulfurization absorption tower 1 and a pH electrode measuring cell 5, the desulfurization absorption tower 1 is connected with the pH battery measuring cell 5 through an introduction pipe 3;
[0031] The pH battery measuring cell 5 is provided with a pH electrode 6, which is fixed on the top of the pH electrode measuring cell 5 and inserted into the slurry of the pH electrode measuring cell 5;
[0032] The bottom wall of the desulfurization absorption tower 1 is provided with an outflow port 2, and the inlet pipe 3 is obliquely downwardly connected from the outflow port 2 to the inlet port 4 on the side wall of the pH battery measuring cell 5;
[0033] An overflow port 7 is formed on the other side wall of the pH battery measuring cell 5 .
[0034] In a possible implementation manner, the overflow port 7 is communicated with an overflow pipe 8 , the overflow pipe 8 leads to the drainage ditch 10 , and the overflow pipe 8 is an L-shaped pipe.
[0035] In a possible implementation, the level of the outflow port 2 is higher than that of the inlet 4 .
[0036] Specifically, the slurry flows into the pH battery measuring cell 5 through the outflow port 2 due to the pressure difference between the static pressure generated by the slurry itself and the atmospheric pressure.
[0037] In a possible implementation manner, the measuring height of the pH electrode 6 is lower than the overflow port 7 , and the level of the overflow port 7 is higher than the introduction port 4 .
[0038] Specifically, the pH electrode 6 can work normally to measure the pH value of the slurry in the pH battery measuring cell 5; it can also ensure that the slurry in the pH electrode measuring cell 5 flows smoothly, and overflows from the overflow port 7 when the slurry reaches a certain height, so that the measured slurry is introduced into the drain ditch 10 through the overflow pipe 8.
[0039] In a possible implementation, the measuring height of the pH electrode 6 is higher than the introduction port 4 .
[0040] Specifically, when in use, the slurry is first stored in the pH battery measuring cell 5. When the slurry reaches a certain height, the pH electrode 6 measures the slurry in the pH electrode measuring cell 5, while further avoiding the impact of the turbulent slurry on the pH electrode 6.
[0041] In a possible implementation manner, the outflow port 2 has a height of 1 m.
[0042] Specifically, the outlet 2 is selected based on the condition that the liquid flow performance on the side wall of the desulfurization absorption tower 1 is good, and a hole is opened at a position that is at an appropriate distance from the limestone slurry replenishment point of the desulfurization absorption tower 1 and can fully react with the slurry.
[0043] In a possible implementation, the pH electrode measuring cell 5 is made of a semi-enclosed structure and anti-corrosion material.
[0044] In a possible implementation manner, a first diaphragm valve 9 is provided on the overflow pipe 8 , and a second diaphragm valve 11 is provided on the inlet pipe 3 .
[0045] Specifically, the two diaphragm valves are both connected by flanges and used as medium partition doors. The openings of the two diaphragm valves can be adjusted according to the liquid level height during use, thereby controlling the flow rate and liquid level of the slurry in the pH electrode measurement pool 5 to ensure the best characteristics of pH measurement.
[0046] In a possible implementation manner, a measurement hole is reserved on the top of the pH electrode measurement cell 5 .
[0047] Specifically, an online pH meter or a portable pH meter for manual analysis can be installed in the measuring hole, and manual sampling is selected as the sampling method. When in use, sampling is performed at the same time, space, and temperature as automatic measurement sampling, eliminating the system error caused by sampling and ensuring the accuracy of the measurement.
[0048] In a possible implementation, a pH meter box is installed at zero meters from the bottom of the desulfurization absorption tower 1 .
[0049] Specifically, when the device is operating normally, the online pH electrode is fixed on the top of the pH electrode measuring tank 5, and the electrode is inserted into the slurry. The pH meter instrument box ensures the normal operation of the online pH electrode, so that the online pH electrode measures the pH value of the slurry before the slurry flows out from the overflow port 7.
[0050] Specifically, since the pH electrode measuring cell 5 can store slurry, when a single pH electrode is calibrated, the other pH electrode can work normally to measure the slurry stored in the pH electrode measuring cell 5 .
[0051] The advantages of this embodiment are:
[0052] The slurry in the desulfurization absorption tower 1 flows by itself to the pH electrode measuring pool 5 due to the height difference and the atmospheric static pressure principle, thus achieving 24-hour uninterrupted sampling, getting rid of the reliance on the gypsum removal pump in the prior art, not generating unnecessary power consumption, and avoiding the scouring and wear of the pH electrode glass bulb by the high outlet pressure of the gypsum removal pump, thereby extending the service life of the electrode.
[0053] This embodiment also achieves consistency in time, space, and temperature between manual sampling and system automatic sampling, eliminates system errors, and ensures measurement accuracy.
[0054] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.
Claims
1. A desulfurization absorption tower pH measuring device, characterized in that: include: A desulfurization absorption tower and a pH electrode measuring cell, wherein the desulfurization absorption tower is connected to the pH battery measuring cell via an introduction pipe; A pH electrode is provided in the pH battery measuring cell, and the pH electrode is fixed on the top of the pH electrode measuring cell and inserted into the slurry of the pH electrode measuring cell; The bottom wall of the desulfurization absorption tower is provided with an outflow port, and the inlet pipe is obliquely led downward from the outflow port into the inlet port on one side wall of the pH battery measuring cell; The level of the outflow port is higher than the inlet port; The other side wall of the pH battery measuring cell is provided with an overflow port.
2. A desulfurization absorption tower pH measuring device according to claim 1, characterized in that: The overflow port is communicated with an overflow pipe, the overflow pipe leads to a drainage ditch, and the overflow pipe is an L-shaped pipe.
3. A desulfurization absorption tower pH measuring device according to claim 1 or 2, characterized in that: The measuring height of the pH electrode is lower than the overflow port, and the level of the overflow port is higher than the introduction port.
4. The desulfurization absorption tower pH measuring device according to claim 1, characterized in that: The measuring height of the pH electrode is higher than the introduction port.
5. The desulfurization absorption tower pH measuring device according to claim 2, characterized in that: The overflow pipe is provided with a first diaphragm valve, and the inlet pipe is provided with a second diaphragm valve; The first diaphragm valve and the second diaphragm valve are both connected by flanges.
6. The desulfurization absorption tower pH measuring device according to claim 1, characterized in that: The outflow outlet height is 1 m.
7. The desulfurization absorption tower pH measuring device according to claim 6, characterized in that: The outlet is selected from a position on the side wall of the desulfurization absorption tower where the liquid flow performance is good, which is at an appropriate distance from the limestone slurry replenishment point of the desulfurization absorption tower and can fully react with the slurry, and is opened.
8. The desulfurization absorption tower pH measuring device according to claim 1, characterized in that: A pH meter box is installed at zero meter of the bottom of the desulfurization absorption tower.
9. The desulfurization absorption tower pH measuring device according to claim 1, characterized in that: The pH electrode measuring cell is made of a semi-enclosed structure and anti-corrosion material.
10. The desulfurization absorption tower pH measuring device according to claim 1, characterized in that: A measuring hole is reserved on the top of the pH electrode measuring pool, and an online pH meter or a portable pH meter for manual analysis is installed in the measuring hole.