CN112595627A - Intelligent desulfurization slurry densimeter - Google Patents
Intelligent desulfurization slurry densimeter Download PDFInfo
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- CN112595627A CN112595627A CN202011093003.6A CN202011093003A CN112595627A CN 112595627 A CN112595627 A CN 112595627A CN 202011093003 A CN202011093003 A CN 202011093003A CN 112595627 A CN112595627 A CN 112595627A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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Abstract
The invention discloses an intelligent desulfurization slurry densimeter, which comprises a desulfurization slurry storage tank, a desulfurization slurry inlet pipe, a flushing water inlet pipe, an overflow slurry discharging pipe, a compressed air inlet pipe, a pressure sensor, a pressure density converter and a waste liquid discharging pipe, wherein the desulfurization slurry inlet pipe and the flushing water inlet pipe are connected to the top of the desulfurization slurry storage tank, the overflow slurry discharging pipe and the compressed air inlet pipe are connected to the upper part of the desulfurization slurry storage tank, the waste liquid discharging pipe is connected to the bottom of the desulfurization slurry storage tank, the pressure sensor is connected to the bottom of the desulfurization slurry storage tank, and the pressure density converter is connected with the pressure sensor. The invention utilizes the physical principle of the relation between the internal pressure of the liquid and the depth to convert the direct reading of the slurry density into the reading of pressure data, adopts a non-contact testing method to avoid the problems of blockage and abrasion of the existing desulfurization slurry densimeter, can effectively ensure the accuracy and stability of the desulfurization slurry densimeter, and has wide application and popularization values.
Description
Technical Field
The invention relates to an intelligent desulfurization slurry densimeter.
Background
In order to meet the requirements of the emission limit of sulfur dioxide of an atmospheric pollutant, large power station boilers at home and abroad basically adopt a limestone-gypsum wet desulphurization process. Two key parameters concerned in the process operation are the pH value and the density of the desulfurization slurry, the former determines the efficiency of the desulfurization slurry, namely the emission concentration of the sulfur dioxide of an atmospheric pollutant is directly influenced, the latter indirectly influences the desulfurization efficiency and simultaneously directly determines the gypsum emission of the desulfurization slurry, and the two key parameters accurately obtain the parameters which influence the safe, stable, environment-friendly and economic operation of a desulfurization system.
At present, in a limestone-gypsum wet desulphurization process adopted by a desulphurization process of a large power station, the operation requirement of a desulphurization system can be basically met at the initial stage of the operation of a desulphurization slurry densimeter, but the densimeter has the problems of blockage and abrasion in different degrees along with the increase of the operation time, and cannot accurately and timely provide data reference for the desulphurization operation. Therefore, in order to avoid the problems of blockage and abrasion of the slurry densimeter in the limestone-gypsum wet desulphurization process and improve the accuracy and stability of the density of the desulphurization slurry, a safe and stable limestone-gypsum wet desulphurization slurry densimeter is required to be found in the limestone-gypsum wet desulphurization process of the power station.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a desulfurization slurry densimeter aiming at solving the problems of abrasion, blockage and the like of the slurry densimeter in the limestone-gypsum wet desulfurization process of the coal-fired unit of the power station and influencing the accuracy of the density value of the desulfurization slurry, so that the accuracy and the reliability of the density data of the desulfurization slurry are improved.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides an intelligence desulfurization thick liquid densimeter, characterized by, arranges thick liquid pipe, compressed air inlet tube, pressure sensor, pressure density converter and waste liquid delivery pipe including desulfurization thick liquid holding vessel, desulfurization thick liquid inlet tube, sparge water inlet tube, overflow thick liquid, desulfurization thick liquid inlet tube and sparge water inlet tube connection are at the top of desulfurization thick liquid holding vessel, overflow thick liquid arranges thick liquid pipe and compressed air inlet tube connection on the upper portion of desulfurization thick liquid holding vessel, waste liquid delivery pipe connection is in the bottom of desulfurization thick liquid holding vessel, pressure sensor connects the bottom at desulfurization thick liquid holding vessel, pressure density converter is connected with pressure sensor.
Furthermore, the desulfurization slurry inlet pipe, the flushing water inlet pipe, the overflow slurry discharging pipe, the compressed air inlet pipe and the waste liquid discharging pipe are respectively provided with a desulfurization slurry inlet electric automatic valve, a flushing water inlet electric automatic valve, an overflow slurry discharging electric automatic valve, a compressed air inlet electric automatic valve and a waste liquid discharging electric automatic valve.
Furthermore, the intelligence desulfurization thick liquid densimeter is arranged in the desulfurization absorption tower outward, and the indirect reading desulfurization absorption tower inner slurry liquid data reads through pressure sensor and in the desulfurization thick liquid holding vessel desulfurization thick liquid pressure data, utilizes the inside pressure of liquid and degree of depth relation to carry out data conversion, reads desulfurization thick liquid density through the pressure density converter.
Furthermore, each electric automatic valve ensures that the volume of the slurry stored in the desulfurization slurry storage tank is constant, namely the height of the stored slurry is constant through an electric automatic program control design coordination switch, so that the data change read by the pressure sensor is only caused by the slurry density change, and the accuracy of conversion between the data of the pressure density converter is ensured.
Furthermore, during the process of supplying and cleaning the desulfurization slurry in the desulfurization slurry storage tank, the electric automatic valve for discharging the overflow slurry is opened at the same time, so that the air in the desulfurization slurry storage tank is discharged and the excess desulfurization slurry is prevented; after the desulfurization slurry density finishes pressure data reading and the slurry in the desulfurization slurry storage tank is discharged, opening a washing water inlet electric automatic valve to clean the desulfurization slurry storage tank, and ensuring that no slurry remains in the desulfurization slurry storage tank; after the washing of desulfurization thick liquid holding vessel is accomplished to the sparge water, close overflow thick liquid and arrange the electronic automatic valve of thick liquid, open the electronic automatic valve of waste liquid discharge to open the electronic automatic valve of compressed air entry, compressed air sweeps desulfurization thick liquid holding vessel inner space, ensures that desulfurization thick liquid holding vessel does not have the waste liquid to remain, ensures the accuracy of follow-up desulfurization thick liquid density test data.
Compared with the prior art, the invention has the following advantages and effects:
1. the method is used for on-line limestone-gypsum wet desulphurization density test, can accurately feed back the density of the desulphurization slurry by utilizing the physical principle of the relation between the internal pressure and the depth of the liquid, and lays a foundation for realizing the numerical control technology of the desulphurization system to provide stable data.
2. The invention adopts the high-precision pressure sensor, can effectively reflect the tiny change of pressure data, provides high-precision pressure data for the pressure-density converter and provides an effective data source for density data.
3. The intelligent desulfurization slurry densimeter is externally arranged on the desulfurization absorption tower, the amount of the discharged slurry is small, and the influence of the desulfurization slurry inlet pipe on the strength of a material of a leading joint is small.
4. The invention introduces the slurry into the desulfurization slurry storage tank, is not influenced by impact force, waves, concentration gradient and turbulence in the desulfurization absorption tower during mechanical stirring in the measurement process, the liquid level of the desulfurization slurry storage tank is stable, and the measured value is always a stable average value.
5. The washing water and the compressed air can ensure the cleaning effect of the desulfurization slurry storage tank after each measurement, avoid the residue of the desulfurization slurry and ensure the accuracy of test data.
6. The intelligent desulfurization slurry densimeter of the invention adopts an external type and has less slurry introduction amount, thereby effectively avoiding the problems of abrasion, blockage and the like, prolonging the service life and ensuring the measurement accuracy.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: the desulfurization slurry storage tank 1, the desulfurization slurry inlet pipe 2, the desulfurization slurry inlet electric automatic valve 3, the washing water inlet electric automatic valve 4, the washing water inlet pipe 5, the overflow slurry discharge pipe 6, the overflow slurry discharge electric automatic valve 7, the compressed air inlet pipe 8, the compressed air inlet electric automatic valve 9, the pressure sensor 10, the pressure density converter 11, the waste liquid discharge electric automatic valve 12, and the waste liquid discharge pipe 13.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in this embodiment, an intelligent desulfurization slurry densimeter includes a desulfurization slurry storage tank 1, a desulfurization slurry inlet pipe 2, a washing water inlet pipe 5, an overflow slurry discharging pipe 6, a compressed air inlet pipe 8, a pressure sensor 10, a pressure density converter 11 and a waste liquid discharging pipe 13, wherein the desulfurization slurry inlet pipe 2 and the washing water inlet pipe 5 are connected to the top of the desulfurization slurry storage tank 1, the overflow slurry discharging pipe 6 and the compressed air inlet pipe 8 are connected to the upper part of the desulfurization slurry storage tank 1, the waste liquid discharging pipe 13 is connected to the bottom of the desulfurization slurry storage tank 1, the pressure sensor 10 is connected to the bottom of the desulfurization slurry storage tank 1, and the pressure density converter 11 is connected to the pressure sensor 10; the desulfurization slurry inlet pipe 2, the washing water inlet pipe 5, the overflow slurry discharge pipe 6, the compressed air inlet pipe 8 and the waste liquid discharge pipe 13 are respectively provided with a desulfurization slurry inlet electric automatic valve 3, a washing water inlet electric automatic valve 4, an overflow slurry discharge electric automatic valve 7, a compressed air inlet electric automatic valve 9 and a waste liquid discharge electric automatic valve 12.
The process of the present invention and the specific embodiments of the entire densitometer for measuring density are described in detail below:
1. the invention adopts the limestone-gypsum wet desulphurization tower to be arranged outside, an electric automatic valve 3 at a desulphurization slurry inlet and an electric automatic valve 7 for overflowing slurry discharge are opened, an electric automatic valve 9 at a compressed air inlet and an electric automatic valve 12 for waste liquid discharge are closed, and the desulphurization slurry is introduced into a desulphurization slurry storage tank 1 through a desulphurization slurry inlet pipe 2.
2. After the desulfurization slurry storage tank 1 reaches the set liquid volume, the desulfurization slurry inlet electric automatic valve 3 and the overflow slurry discharging electric automatic valve 7 are closed, the desulfurization slurry in the desulfurization slurry storage tank 1 is stable, the pressure sensor 10 reads pressure data, the pressure sensor 10 transmits the pressure data to the pressure density converter 11, and the density of the separated slurry is deduced according to the physical principle calculation formula P = rho gh of the relation between the internal pressure and the depth of the liquid.
3. After the test, the waste liquid discharge electric automatic valve 12 and the washing water inlet electric automatic valve 4 are opened, the slurry with the tested density is discharged through the waste liquid discharge pipe 13, and simultaneously washing water enters the desulfurization slurry storage tank 1 from the washing water inlet pipe 5 to wash the desulfurization slurry.
4. And after the washing water is washed, closing the washing water inlet electric automatic valve 4, opening the compressed air inlet electric automatic valve 9, and allowing compressed air to enter the desulfurization slurry storage tank 1 through the compressed air inlet pipe 8 to perform air purging on the desulfurization slurry storage tank 1.
5. And repeating the steps to test the density of the desulfurized slurry.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. An intelligent desulfurization slurry densimeter is characterized by comprising a desulfurization slurry storage tank (1), a desulfurization slurry inlet pipe (2), a washing water inlet pipe (5), an overflow slurry discharging pipe (6), a compressed air inlet pipe (8), a pressure sensor (10), a pressure-density converter (11) and a waste liquid discharging pipe (13), the desulfurization slurry inlet pipe (2) and the flushing water inlet pipe (5) are connected to the top of the desulfurization slurry storage tank (1), the overflow slurry discharging pipe (6) and the compressed air inlet pipe (8) are connected with the upper part of the desulfurization slurry storage tank (1), the waste liquid discharge pipe (13) is connected with the bottom of the desulfurization slurry storage tank (1), the pressure sensor (10) is connected with the bottom end of the desulfurization slurry storage tank (1), the pressure density converter (11) is connected with the pressure sensor (10); desulfurization slurry inlet pipe (2), sparge water inlet pipe (5), overflow slurry discharge pipe (6), compressed air inlet pipe (8), waste liquid discharge pipe (13) are gone up and are installed desulfurization slurry entry electric automatic valve (3), the electronic automatic valve of sparge water entry (4), overflow slurry discharge electric automatic valve (7), the electronic automatic valve of compressed air entry (9), waste liquid discharge electric automatic valve (12) respectively.
2. The intelligent desulfurization slurry densimeter of claim 1, wherein the intelligent desulfurization slurry densimeter is externally arranged on the desulfurization absorption tower, the data of the slurry in the desulfurization absorption tower is indirectly read, the pressure data of the desulfurization slurry in the desulfurization slurry storage tank (1) is read through the pressure sensor (10), the data conversion is carried out by utilizing the relation between the internal pressure and the depth of the liquid, and the density of the desulfurization slurry is read through the pressure density converter (11).
3. The intelligent desulfurization slurry densitometer of claim 1, wherein each electric automatic valve is coordinated by an electric automatic program control design to ensure constant volume of slurry stored in the desulfurization slurry storage tank (1), i.e. constant height of slurry stored, so that the data change read by the pressure sensor (10) is only caused by slurry density change, and the accuracy of conversion between the data of the pressure density converter (11) is ensured.
4. The intelligent desulfurization slurry densimeter according to claim 1, wherein during the slurry supply and cleaning of the desulfurization slurry storage tank (1), the electric automatic valve (7) for discharging the overflow slurry is opened simultaneously to ensure the air discharge of the desulfurization slurry storage tank (1) and prevent the excess desulfurization slurry; after the desulfurization slurry density finishes pressure data reading and the slurry in the desulfurization slurry storage tank (1) is discharged, opening a washing water inlet electric automatic valve (4) to wash the desulfurization slurry storage tank (1) so as to ensure that no slurry remains in the desulfurization slurry storage tank (1); after the washing water finishes the cleaning of the desulfurization slurry storage tank (1), the overflow slurry discharging electric automatic valve (7) is closed, the waste liquid discharging electric automatic valve (12) is opened, the compressed air inlet electric automatic valve (9) is opened, the compressed air sweeps the inner space of the desulfurization slurry storage tank (1), the desulfurization slurry storage tank (1) is ensured to have no waste liquid residue, and the accuracy of the density test data of the subsequent desulfurization slurry is ensured.
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| CN202011093003.6A CN112595627A (en) | 2020-10-13 | 2020-10-13 | Intelligent desulfurization slurry densimeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147379A (en) * | 2023-08-10 | 2023-12-01 | 四川维泰科创石油设备制造有限公司 | Intelligent viscosity monitoring method and system thereof |
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| CN104614281A (en) * | 2014-12-25 | 2015-05-13 | 江苏一环集团有限公司 | Integrated device for measuring slurry density and pH(potential of hydrogen) in lime(stone)-plaster wet desulphurization tower |
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2020
- 2020-10-13 CN CN202011093003.6A patent/CN112595627A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614281A (en) * | 2014-12-25 | 2015-05-13 | 江苏一环集团有限公司 | Integrated device for measuring slurry density and pH(potential of hydrogen) in lime(stone)-plaster wet desulphurization tower |
| CN206057130U (en) * | 2016-09-21 | 2017-03-29 | 江苏德义通环保科技有限公司 | A kind of serosity composite measurement tank |
| CN207850864U (en) * | 2017-12-20 | 2018-09-11 | 华润电力（常熟）有限公司 | A kind of slurry density of desulfurizing absorption column measuring device |
| CN108444866A (en) * | 2018-06-22 | 2018-08-24 | 华润电力登封有限公司 | Slurry density measurement device |
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| CN210293973U (en) * | 2019-03-18 | 2020-04-10 | 安徽陆海石油助剂科技有限公司 | Liquid density measuring device |
| CN210742049U (en) * | 2019-07-17 | 2020-06-12 | 昆岳互联环境技术(江苏)有限公司 | Ammonia process desulfurization slurry density on-line testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147379A (en) * | 2023-08-10 | 2023-12-01 | 四川维泰科创石油设备制造有限公司 | Intelligent viscosity monitoring method and system thereof |
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