CN211402032U - Novel desulfurization system slurry density measuring device - Google Patents
Novel desulfurization system slurry density measuring device Download PDFInfo
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- CN211402032U CN211402032U CN201922367904.9U CN201922367904U CN211402032U CN 211402032 U CN211402032 U CN 211402032U CN 201922367904 U CN201922367904 U CN 201922367904U CN 211402032 U CN211402032 U CN 211402032U
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Abstract
The utility model provides a novel desulfurization system slurry density measuring device, which comprises a cabinet, an electric control unit and a measuring unit, wherein the electric control unit and the measuring unit are arranged in the cabinet, the measuring unit comprises two sets of redundant measuring components and a connecting pipe fitting for connecting the measuring components, and the two sets of measuring components are respectively a measuring component A and a measuring component B which have the same structure; the measuring component comprises a measuring cylinder and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder, and the measuring cylinder is provided with an overflow port, a pH meter interface, a measuring opening, a slurry introducing opening and a dredging pipe opening. The measuring device has the advantages of high measuring precision, automatic cleaning function, good stability, small maintenance amount, economy and practicality, and is suitable for all application occasions of slurry density measurement.
Description
Technical Field
The utility model relates to an environmental protection desulfurization technical field specifically is a novel desulfurization system thick liquid density measurement device.
Background
In a magnesium method, a sodium method, a calcium method and other desulfurization systems, the measurement of the slurry density directly affects the control of desulfurization efficiency and desulfurizer consumption, so that the method is a more critical measurement link. The currently popular measurement techniques can be categorized into three categories.
The first type is a radioactive densitometer, and the measurement principle is as follows: the density of the slurry is converted by measuring the nuclear radiation density dose passing through the slurry. The installation and application approval procedures of the radioactive instrument are complicated, and the radioactive instrument has certain radiation hazard to operators, so that the mainstream market is faded out at present, and the application occasions are few.
The second type is a mass flow meter, which is based on the coriolis measurement principle and changes the vibration frequency when the medium passes through a measuring tube with a fixed vibration frequency, and by measuring the vibration frequency, the density of the medium can be calculated. The installation requirements of the equipment are high, firstly, the measurement under the condition of full pipe must be ensured; secondly, because the measuring pipe diameter of the mass flowmeter is limited (generally between DN32 and DN 100), in order to prevent blockage caused by low flow rate, the mass flowmeter is usually considered to be arranged at the outlet of the pump in practical application, but the installation mode also brings negative effects, namely the measuring equipment is easy to wear, the damage rate is high, and the maintenance workload is large.
The third type is density measurement by a differential pressure method, and the measurement principle is Archimedes' law. The measurement mode is that a pressure difference delta P is measured by a pressure/pressure difference measuring instrument arranged on a tank, and then the slurry density rho is indirectly measured according to a formula rho ═ delta P/gh. At present, there are two kinds of applications. The first method comprises the following steps: the manometer was directly mounted on the tank for the slurry to be measured. For example, the measurement of the density of limestone slurry by a calcium method and the density of slurry by an absorption tower adopt the measurement mode, and the problems are that: this kind of measurement mode can receive the inside liquid of tank and rock the influence, like: the stirrer, the blowing-in of oxidizing air and the like can influence the liquid level height of the slurry, and the fluctuation of pressure difference is caused, so that the measurement accuracy and stability are not high; and the second method comprises the following steps: the model measurement, namely the measurement of draining the slurry out of the storage tank through a pipeline, avoids the disadvantages in the first case. However, the conventional sampling-type measurement method has the following defects: to ensure that the characteristics of the removed slurry are consistent with those of the source slurry being measured, it is necessary to continuously withdraw fresh slurry and measure, for example: at the time of T1, slurry at a source to be measured is extracted to a common sampling type measuring device for measurement, one measurement is completed at the time of T2, measurement data are uploaded, then, the slurry must be emptied before the next measurement, a measuring pipeline is flushed, new slurry is introduced again for re-measurement, the series of actions takes time T, in the time period T, real-time measurement is stopped, and in order to ensure the uninterrupted control of the desulfurization system, at the time of T2+ T, the control system can only maintain and utilize the measured value at the time of the last T2, therefore, the common sampling drainage measuring device has measurement hysteresis and is not monitored in real time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a novel desulfurization system thick liquid density measurement device based on differential pressure method density measurement principle to solve the problem that proposes in the above-mentioned background art.
The utility model provides a technical problem adopt following technical scheme to realize: a novel desulfurization system slurry density measuring device comprises a cabinet, an electric control unit and a measuring unit, wherein the electric control unit and the measuring unit are installed in the cabinet, the measuring unit comprises two sets of redundant measuring assemblies and a connecting pipe fitting for connecting the measuring assemblies, and the two sets of measuring assemblies are respectively a measuring assembly A and a measuring assembly B which are consistent in structure; the measuring component comprises a measuring cylinder and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder, and the measuring cylinder is provided with an overflow port, a pH meter interface, a measuring opening, a slurry introducing opening and a dredging pipe opening; the overflow port is positioned on the side edge of the upper end of the measuring cylinder, and an external connecting pipe of the overflow port inclines downwards so as to facilitate the liquid to flow out; the pH meter interface is positioned at the middle part of the measuring cylinder and is far away from one end of the overflow port, and an external connecting pipe of the pH meter interface inclines upwards; the measuring opening and the slurry introducing opening are arranged at the lower part of the measuring cylinder, the measuring opening is positioned at the upper end of the slurry introducing opening, an external connecting pipe of the measuring opening is respectively connected with the pressure transmitter and the flushing water electromagnetic valve through a three-way pipe, and the slurry introducing opening is connected with the feeding electromagnetic valve through the external connecting pipe; the opening of the drainage pipe is positioned at the bottom of the measuring cylinder, the outer end of the opening of the drainage pipe is connected with a drainage pipeline, and a drainage electromagnetic valve for controlling on-off is installed on the drainage pipeline.
The utility model discloses a further scheme does: the connecting pipe fitting comprises an overflow pipe connected with the slurry ditch, a water pipe for conveying process water and a liquid pipe for conveying the slurry to be detected; the overflow pipe is connected with an overflow port at the upper end of the measuring cylinder, the water pipe is connected with the flushing water electromagnetic valve and used for flushing the measuring cylinder and the measuring component pipeline, and the liquid pipe is connected with the feeding electromagnetic valve and used for controlling the slurry to enter the measuring cylinder from the source.
The utility model discloses a further scheme does: the measuring component A and the measuring component B are respectively connected with the overflow pipe, the water pipe and the liquid pipe, and drainage pipelines at the lower ends of the measuring component A and the measuring component B are converged to send the discharge into the drainage ditch.
The utility model discloses a further scheme does: the outer end of the pH meter interface is plugged by a stainless steel blind flange.
The utility model discloses a further scheme does: the pressure transmitter is a flange type pressure transmitter, and a diaphragm of the pressure transmitter, which is in contact with the slurry, is made of stainless steel.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a mode of sample drainage will be surveyed the thick liquid and introduce the measuring cylinder in the measuring unit, consequently does not receive any vibration equipment's influence in the measurement process, if contain the bubble in the thick liquid of introducing the measuring cylinder, also will release through the overflow mouth at measuring cylinder top, consequently guaranteed the stability of the measuring condition of thick liquid.
2. The utility model overcomes the drawback that ordinary sample measurement mode exists based on differential pressure method density measurement principle, in order to realize continuous incessant real-time supervision, introduced redundant switching measuring mode, two sets of measuring component A and the mutual alternate work of B of mutual redundancy, two sets of measuring component's control logic is unanimous, all includes program steps such as washing, measurement, data upload.
3. The measuring device has the advantages of high measuring precision, automatic cleaning function, good stability, small maintenance amount, economy and practicality, and is suitable for all application occasions of slurry density measurement.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the structure of the measuring unit of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the specific drawings.
As shown in FIGS. 1-2,
the embodiment provides a novel slurry density measuring device of a desulfurization system, which comprises a cabinet 1, an electric control unit 2 and a measuring unit 3, wherein the electric control unit 2 and the measuring unit 3 are installed in the cabinet 1, the measuring unit 3 comprises two sets of redundant measuring components and a connecting pipe fitting for connecting the measuring components, and the two sets of measuring components are respectively a measuring component A4 and a measuring component B5 which are consistent in structure; the measuring component comprises a measuring cylinder 31 and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder 31, and the measuring cylinder is provided with an overflow port 32, a pH meter interface 33, a measuring opening, a slurry introducing opening and a dredging pipe opening; the overflow port 32 is positioned on the side edge of the upper end of the measuring cylinder 31, and an external connecting pipe of the overflow port 32 inclines downwards so as to facilitate the liquid to flow out; the pH meter interface 33 is positioned at the middle part of the measuring cylinder 31 and is far away from one end of the overflow port 32, and an external connecting pipe of the pH meter interface 33 inclines upwards; the measuring opening and the slurry introducing opening are arranged at the lower part of the measuring cylinder 31, the measuring opening is positioned at the upper end of the slurry introducing opening, an external connecting pipe of the measuring opening is respectively connected with a pressure transmitter 35 and a flushing water electromagnetic valve 36 through a three-way pipe 34, and the slurry introducing opening is connected with a feeding electromagnetic valve 37 through the external connecting pipe; the opening of the drainage pipe is located at the bottom of the measuring cylinder 31, the outer end of the opening of the drainage pipe is connected with a drainage pipeline 38, and a drainage electromagnetic valve 39 for controlling on-off is installed on the drainage pipeline 38.
In this embodiment, the connecting pipe includes an overflow pipe 11 connected to the slurry channel, a water pipe 12 for conveying process water, and a liquid pipe 13 for conveying slurry to be measured; the overflow pipe 11 is connected with an overflow port 32 at the upper end of the measuring cylinder 31, the water pipe 12 is connected with a flushing water solenoid valve 36 and used for flushing the measuring cylinder 31 and the measuring assembly pipeline, and the liquid pipe 13 is connected with a feeding solenoid valve 39 and used for controlling the slurry to enter the measuring cylinder from a source.
In this embodiment, the measuring module a4 and the measuring module B5 are connected to the overflow pipe 11, the water pipe 12 and the liquid pipe 13, respectively, and the drainage pipes 38 at the lower ends of the measuring module a4 and the measuring module B5 are collected to send the drainage to the drainage ditch.
In this embodiment, the outer end of the pH meter port 33 is plugged by a stainless steel blind flange.
In this embodiment, the pressure transmitter 35 is a flange-type pressure transmitter, and a diaphragm of the pressure transmitter 35 in contact with the slurry is made of stainless steel.
Specifically, during measurement, the feeding solenoid valve 37 of the measuring cylinder 31 is opened, the measured slurry is injected into the measuring cylinder 31 under pressure until the slurry fills the entire measuring cylinder 31, the excess slurry is discharged through the overflow port 32 above the measuring cylinder 31, then the feeding solenoid valve 37 is closed, and after a period of time, the liquid in the cylinder 31 to be measured is in a static state, and then the measurement is started. The measurement principle is completely based on the derivation of Archimedes' law, namely, the pressure of the liquid is the product of the density, the height and the gravity acceleration of the liquid, and is expressed by a formula: Δ P is rho g h, wherein Δ P passes through the utility model discloses in install pressure transmitter 35 on measuring the section of thick bamboo 31 body and measure and obtain, h is the design measurement height, pressure transmitter's mounting hole is to the distance of overflow mouth promptly, g is acceleration by gravity, is constant, and the formula is out of shape the back, and rho is Δ P/gh, can conveniently obtain the density rho of being surveyed the thick liquid.
The embodiment provides a measuring method of a novel desulfurization system slurry density measuring device, which achieves the purpose of real-time measurement through a redundancy switching mode, and completes the measurement work through the mutual alternate work of two sets of mutually redundant measuring components A4 and B5; the method specifically comprises the following steps: and when the measurement component B5 finishes measurement, the measurement component B5 is switched to and uploads the measurement result of the measurement component B5, and then the measurement component A4 is put into the measurement component B5 during the continuous process of keeping uploading the measurement data, so that the two sets of measurement components work in a reciprocating mode to finish continuous monitoring of the density of the slurry.
Taking the measurement component a as an example, the control flows of cleaning, measurement, data uploading and the like are as follows:
after the measurement is started, the feed solenoid valve 37 is confirmed to be in a closed state, and then a cleaning step is performed, wherein the cleaning frequency n1 can be set in the PLC as required, and two times of flushing are performed by default. In the cleaning process, the drainage solenoid valve 39 at the bottom of the measuring cylinder 31 needs to be opened, the delay time for opening the valve is X1, X1 can be set in PLC, the time for emptying liquid in the measuring cylinder 31 is accurate, the valve is closed after the grout in the measuring cylinder 31 is discharged, the flushing water solenoid valve 36 is opened again to flush the measuring cylinder 31 with water, the water injection time is X2, X2 can be set in PLC, the measuring cylinder 31 is completely filled with clear water, and overflow is generated and discharged to a grout ditch.
After the cleaning step is completed, before the measuring step is started, the liquid in the measuring cylinder is completely drained by opening the drainage solenoid valve 39 to prepare for introducing the slurry, and then the feeding solenoid valve 37 in the measuring assembly a4 is opened to wait for the slurry to enter and fill the whole cylinder and generate overflow, wherein the purpose of generating overflow is to ensure that the slurry can fill the whole measuring cylinder 31 to reach the designed measuring height h2, the waiting time is the measuring delay time X3, and the X3 is usually determined by actual product debugging and is an adjustable parameter.
When the feed solenoid valve 37 is closed, in order to satisfy stable pressure measurement, it is necessary to wait for the liquid in the measuring cylinder 31 to be not fluctuated after being stationary, and the waiting time is a measurement delay time X4, and X4 is usually determined by actual product debugging and is an adjustable parameter.
After the X4 time period ends, the pressure transducer 35 measures the pressure of the slurry in the cartridge 31, and the logic programmed controller (PLC) receives the pressure value, converts it to a density value according to the built-in formula ρ Δ P/gh2, and uploads it to the remote control system. The hold time for data upload to the remote control system is X5.
After the time period of X4 is over, the measurement module B5 is put into operation, the operation control flow is consistent with that of the measurement module A4, the measurement result of the measurement module B5 is switched and uploaded when the time period of X5 is over, and the measurement module A4 starts to enter a new round of cleaning, measurement and data uploading.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a novel desulfurization system thick liquid density measurement device, includes the rack and installs automatically controlled unit and the measuring element in the rack, its characterized in that: the measuring unit comprises two sets of redundant measuring assemblies and a connecting pipe fitting for connecting the measuring assemblies, wherein the two sets of measuring assemblies are respectively a measuring assembly A and a measuring assembly B with the same structure; the measuring component comprises a measuring cylinder and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder, and the measuring cylinder is provided with an overflow port, a pH meter interface, a measuring opening, a slurry introducing opening and a dredging pipe opening; the overflow port is positioned on the side edge of the upper end of the measuring cylinder, and an external connecting pipe of the overflow port inclines downwards so as to facilitate the liquid to flow out; the pH meter interface is positioned at the middle part of the measuring cylinder and is far away from one end of the overflow port, and an external connecting pipe of the pH meter interface inclines upwards; the measuring opening and the slurry introducing opening are arranged at the lower part of the measuring cylinder, the measuring opening is positioned at the upper end of the slurry introducing opening, an external connecting pipe of the measuring opening is respectively connected with the pressure transmitter and the flushing water electromagnetic valve through a three-way pipe, and the slurry introducing opening is connected with the feeding electromagnetic valve through the external connecting pipe; the opening of the drainage pipe is positioned at the bottom of the measuring cylinder, the outer end of the opening of the drainage pipe is connected with a drainage pipeline, and a drainage electromagnetic valve for controlling on-off is installed on the drainage pipeline.
2. The novel desulfurization system slurry density measuring device according to claim 1, characterized in that: the connecting pipe fitting comprises an overflow pipe connected with the slurry ditch, a water pipe for conveying process water and a liquid pipe for conveying the slurry to be detected; the overflow pipe is connected with an overflow port at the upper end of the measuring cylinder, the water pipe is connected with the flushing water electromagnetic valve and used for flushing the measuring cylinder and the measuring component pipeline, and the liquid pipe is connected with the feeding electromagnetic valve and used for controlling the slurry to enter the measuring cylinder from the source.
3. The novel desulfurization system slurry density measuring device according to claim 2, characterized in that: the measuring component A and the measuring component B are respectively connected with the overflow pipe, the water pipe and the liquid pipe, and drainage pipelines at the lower ends of the measuring component A and the measuring component B are converged to send the discharge into the drainage ditch.
4. The novel desulfurization system slurry density measuring device according to claim 1, characterized in that: the outer end of the pH meter interface is plugged by a stainless steel blind flange.
5. The novel desulfurization system slurry density measuring device according to claim 1, characterized in that: the pressure transmitter is a flange type pressure transmitter, and a diaphragm of the pressure transmitter, which is in contact with the slurry, is made of stainless steel.
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| CN201922367904.9U CN211402032U (en) | 2019-12-25 | 2019-12-25 | Novel desulfurization system slurry density measuring device |
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| CN201922367904.9U CN211402032U (en) | 2019-12-25 | 2019-12-25 | Novel desulfurization system slurry density measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
| CN113552019B (en) * | 2021-05-25 | 2024-03-22 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
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