CN209356016U - A kind of absorbing tower liquid-level height measuring device considering serum density difference - Google Patents
A kind of absorbing tower liquid-level height measuring device considering serum density difference Download PDFInfo
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- CN209356016U CN209356016U CN201920279102.XU CN201920279102U CN209356016U CN 209356016 U CN209356016 U CN 209356016U CN 201920279102 U CN201920279102 U CN 201920279102U CN 209356016 U CN209356016 U CN 209356016U
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- 239000007788 liquid Substances 0.000 title claims abstract description 128
- 210000002966 serum Anatomy 0.000 title abstract 4
- 239000002002 slurry Substances 0.000 claims abstract description 63
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 60
- 230000023556 desulfurization Effects 0.000 claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 claims abstract description 58
- 238000005259 measurement Methods 0.000 claims abstract description 53
- 239000006260 foam Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 21
- 230000003009 desulfurizing effect Effects 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model provides a kind of absorbing tower liquid-level height measuring device for considering serum density difference, the absorbing tower liquid-level height measuring device for considering serum density difference includes: several desulfurization level gauging pressure sensors, several desulfurization level gauging pressure sensors are equally spacedly installed on absorption tower side wall to absorbing tower bottom from the desulfurization level gauging pressure sensor of the top, to measure point position pressure, and the desulfurization level gauging pressure sensor of the top is set to liquid level of slurry maximum pressure point position.The absorbing tower liquid-level height measuring device of the consideration serum density difference provided by the utility model can accurately measure desulfurization liquid level, reduce the influence of desulfurization slurry foam falseness liquid level, so that measurement result is more representative.
Description
Technical Field
The utility model relates to a consider absorption tower liquid level height measurement device of thick liquid density difference belongs to flue gas desulfurization technical field.
Background
In order to meet the national ultra-low emission requirement of coal-fired units and the modification trend of coal-electricity peak regulation flexibility, the performance requirement of power plants on the desulfurization device of the thermal power unit is higher and higher. Generally, the absorption tower is in countercurrent contact, that is, sulfur-containing flue gas enters from the bottom of the tower, and absorbent enters from the top of the tower, so that the flue gas desulfurization process is completed. If the liquid level at the bottom of the absorption tower is too high, the flue gas enters the inlet of the desulfurization tower in a submerged mode, and the flue gas cannot enter the desulfurization tower. If the liquid level of the absorption tower is too low, the circulating pump is easy to evacuate, once the circulating pump is evacuated, the liquid at the bottom of the tower is not circulated, the liquid level rises rapidly, and the inlet of the flue gas can be submerged. Therefore, the accurate measurement of the liquid level of the desulfurization slurry has extremely important significance for guiding the operation of the absorption tower.
At present, the traditional liquid level measurement of the desulfurizing tower mainly adopts the form of a pressure transmitter. In actual operation, the situation that the vapor phase medium in the slurry of the desulfurization tower is increased sharply (namely, the bubbling phenomenon) occurs, but the measurement value P of the pressure transmitter is unchanged when the measurement position is below the bubbling position, and operating personnel cannot adjust the operation condition in time according to the liquid level fluctuation, so that the control error is caused.
Therefore, the liquid level measuring device of the existing desulfurizing tower needs to be improved and optimized, the measuring error is reduced, and the running production is guided better.
SUMMERY OF THE UTILITY MODEL
In order to solve the above disadvantages and shortcomings, an object of the present invention is to provide an absorption tower liquid level height measuring device considering the difference of slurry density.
In order to achieve the above object, the utility model provides an absorption tower liquid level height measuring device who considers thick liquid density difference, wherein, absorption tower liquid level height measuring device who considers thick liquid density difference includes: the absorption tower liquid level height measuring device considering the slurry density difference comprises: the device comprises a plurality of desulfurization liquid level measurement pressure sensors, wherein the desulfurization liquid level measurement pressure sensors are arranged on the side wall of the absorption tower at equal intervals from the uppermost desulfurization liquid level measurement pressure sensor to the bottom of the absorption tower and are used for measuring the position pressure of a measuring point, and the uppermost desulfurization liquid level measurement pressure sensor is arranged at the position of the highest pressure point of the slurry liquid level.
According to a specific embodiment of the present invention, in the apparatus, preferably, the interval is 1 to 2 m.
According to the utility model discloses a specific embodiment in the device in, preferably, the height ratio absorption tower theoretical highest liquid level height of the desulfurization liquid level measurement pressure sensor of the top is 1-2 m.
According to the specific embodiment of the present invention, in the device, the desulfurization liquid level measurement pressure sensor is conventional equipment in the field.
Device can be applicable to the method of multiple difference and carry out absorption tower liquid level height measurement, it is further right the utility model discloses a device explains, the utility model discloses still provide and use the utility model discloses a device carries out measuring method to absorption tower liquid level height, the method includes following step:
(1) determining the position of the highest pressure point of the liquid level of the slurry according to the theoretical highest liquid level height of the absorption tower;
(2) arranging the uppermost desulfurization liquid level measurement pressure sensor at the highest pressure point of the slurry liquid level on the side wall of the absorption tower, and then mounting a plurality of desulfurization liquid level measurement pressure sensors at equal intervals from the uppermost desulfurization liquid level measurement pressure sensor to the bottom of the absorption tower so as to obtain pressure and height data of each measuring point;
(3) and calculating the liquid level height of the slurry in the absorption tower.
According to a specific embodiment of the present invention, in the method, the height of the position of the highest pressure point of the slurry liquid level is 1 to 2m higher than the theoretical highest liquid level height of the absorption tower.
According to the specific embodiment of the present invention, in the method, the theoretical maximum liquid level height of the absorption tower is obtained by inquiring the design specification and the design drawing of the absorption tower.
According to the specific embodiment of the utility model, in the method, before calculating the slurry liquid level height of the absorption tower, the step (3) further comprises the operation of determining the position of the measuring point nearest to the slurry liquid level; the method specifically comprises the following steps:
comparing the pressure data of each measuring point position with the pressure data of the highest pressure point position of the slurry liquid level, wherein if the pressure difference between the position of the highest pressure point of the slurry liquid level and the position of the next measuring point adjacent to the position of the highest pressure point of the slurry liquid level is larger, the position of the highest pressure point of the slurry liquid level is the position of the nearest measuring point above the slurry liquid level;
and if the pressure at the position of the highest pressure point of the slurry liquid level is close to the pressure at the position of the next measuring point adjacent to the position of the highest pressure point of the slurry liquid level, continuously comparing the pressure at the position of the next measuring point with the pressure at the position of the next measuring point until the pressure data at the positions of two adjacent measuring points have a larger difference, stopping comparison, and setting the position with smaller pressure data at the position of two adjacent measuring points as the position of the nearest measuring point above the slurry liquid level.
For example, in embodiment 2 of the present invention, the pressure P10 at the highest pressure point of the slurry level is close to the pressure P9 at the next measurement point position adjacent to the highest pressure point of the slurry level, which can indicate that the two measurement point positions corresponding to P10 and P9 are both above the slurry level; at this time, P9 and P8 need to be continuously compared, and if the difference between P9 and P8 is large after comparison, it indicates that the point position corresponding to P9 is the closest point position above the slurry liquid level and the point position corresponding to P8 is below the slurry liquid level.
Wherein, the skilled person can judge whether the pressures at the two measuring points are close or greatly different.
According to a specific embodiment of the present invention, in the method, in the step (3), the absorption tower slurry liquid level height is calculated according to the following formula 1):
in the formula 1), H is the liquid level height of the slurry in the absorption tower and is m;
H1measuring the distance between the pressure sensor and the bottom of the absorption tower for the lowest desulfurization liquid level, wherein the unit is m;
H2-Hn-1measuring the distance between two adjacent desulfurization liquid level measurement pressure sensors, wherein the unit is m;
rho is the density of the slurry of the absorption tower and has the unit of kg/m3；
g is the acceleration of gravity in m/s2；
Pn and Pn-1The pressure of the position of the measuring point nearest to the upper part of the slurry liquid level and the position of the next measuring point nearest to the measuring point are respectively expressed in KPa.
According to a particular embodiment of the present invention, in the method, the absorption tower slurry level is comprised of two parts: liquid level (height H) of desulfurization liquid level fluctuation sectionJ) And the liquid level of the desulfurization liquid level fixed section (the height is H)G). Wherein, the numerical value of the liquid level of the desulfurization liquid level variation section is varied, and the liquid level of the desulfurization liquid level fixing section is determined by the distance of the pressure sensors.
Wherein,
absorption tower slurry level height H:
the device and the method for measuring the liquid level height of the absorption tower considering the slurry density difference can accurately measure the desulfurization liquid level and reduce the influence of the false liquid level of the desulfurization slurry foam; the method provided by the utility model adopts the sectional measurement, reduces the influence of the density difference of the slurry, and enables the measurement result to be more representative; specifically, the slurry density in the absorption tower is poor in uniformity, the upper layer has a low density, and the lower layer has a high density. The utility model discloses technical scheme is confirming the density that the used thick liquid density of thick liquid level height mainly is desulfurizing tower thick liquid upper portion, and by the distance that thick liquid density confirmed about 1m, the scope that the thick liquid density difference influences is less, like this alright make the measuring result have more the representative.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the absorption tower liquid level height measuring device considering slurry density difference provided in embodiment 1 of the present invention.
The main reference numbers illustrate:
100. an absorption tower;
1. a desulfurization liquid level measurement pressure sensor at the lowest part;
2. a second desulfurization liquid level measurement pressure sensor;
3. a third desulfurization liquid level measurement pressure sensor;
4. a fourth desulfurization liquid level measurement pressure sensor;
5. a fifth desulfurization liquid level measurement pressure sensor;
6. a sixth desulfurization liquid level measurement pressure sensor;
7. a seventh desulfurization liquid level measurement pressure sensor;
8. an eighth desulfurization liquid level measurement pressure sensor;
9. a ninth desulfurization liquid level measurement pressure sensor;
10. the uppermost desulfurization liquid level measuring pressure sensor.
Detailed Description
The following detailed description of the embodiments and the advantageous effects thereof will be provided by way of specific examples and accompanying drawings, which are provided to assist the reader in better understanding the nature and features of the present invention, and are not intended to limit the scope of the present invention.
Example 1
This embodiment provides a liquid level height measuring device of an absorption tower (desulfurizing tower) taking account of the density difference of slurry, wherein the structural schematic diagram of the device is shown in fig. 1, and as can be seen from fig. 1, the device comprises:
ten desulfurization liquid level measurement pressure sensors (wherein, the uppermost desulfurization liquid level measurement pressure sensor is denoted by 10, the lowermost desulfurization liquid level measurement pressure sensor is denoted by 1, and the other desulfurization liquid level measurement pressure sensors are called as ninth-second desulfurization liquid level measurement pressure sensors according to the direction from the top to the bottom of the tower, and are denoted by 9-2, respectively), the ten desulfurization liquid level measurement pressure sensors are installed on the side wall of the absorption tower 100 at equal intervals (the interval is 1m in the embodiment) from the uppermost desulfurization liquid level measurement pressure sensor 10 to the bottom of the absorption tower, so as to measure the pressure at each measurement point, and the uppermost desulfurization liquid level measurement pressure sensor 10 is arranged at the highest pressure point of the slurry liquid level.
The theoretical maximum liquid level height of the absorption tower is obtained by inquiring design specifications and design drawings of the absorption tower, in the embodiment, the theoretical maximum liquid level height Hym of the absorption tower is 9m, and the installation height of the uppermost desulfurization liquid level measurement pressure sensor 10 is 10 m.
Example 2
The present embodiment provides a method for measuring the liquid level height of an absorption tower (desulfurizing tower) in consideration of slurry density difference, wherein the method is implemented by using the device for measuring the liquid level height of an absorption tower in consideration of slurry density difference provided in embodiment 1, and comprises the following steps:
(1) inquiring design specifications and design drawings of an absorption tower to obtain that the height (Hym in figure 1) of the theoretical highest position of the desulfurization liquid level (slurry level) is 9m, and determining that the height (Hm in figure 1, corresponding pressure is Pm) of the position of the highest pressure point of the slurry level is 10m after adding a certain margin;
(2) a plurality of desulfurization liquid level measurement pressure sensors are arranged on the side wall of the absorption tower at equal intervals from the position of the highest pressure point of the slurry liquid level to the bottom of the absorption tower; to obtain pressure and height data of the measuring point positions, the distances from the bottom (near the tower bottom) to the top (near the tower top) are numbered as H1、H2、H3……H10Typically a pitch of 1 m; wherein H1Denotes the distance, H, of the No. 1 measuring point (i.e., the lowermost desulfurization level measurement pressure sensor) from the bottom of the desulfurization tower2Denotes the distance between measurement Point No. 2 and measurement Point No. 1, H3The distance between the measuring point No. 3 and the measuring point No. 2 is represented, and the rest distances are numbered in the same way. Correspondingly, the pressure number is P from bottom to top1、P2、P3……P10；
And when the system normally operates, obtaining the pressure P of the positions of the plurality of measuring points. Because the pressure measuring point at the uppermost layer is a smoke side pressure measuring point, the smoke side pressure measuring point is not related to the slurry position, and the slurry density is far higher than the smoke density, the pressure value of the pressure measuring point (the measuring point 9 in the embodiment) nearest above the slurry liquid level is similar to the pressure value of the pressure measuring point (the measuring point 10 in the embodiment) at the uppermost layer theoretically, and the pressure at the slurry liquid level is similar to the pressure nearest above the slurry liquid level theoretically.
Calculating the liquid level height of the slurry of the absorption tower according to the following formula 1):
in the formula 1), H is the liquid level height of the slurry in the absorption tower and is m;
H1measuring the distance between the pressure sensor and the bottom of the absorption tower for the lowest desulfurization liquid level, wherein the unit is m;
H2-Hn-1measuring the distance between two adjacent desulfurization liquid level measurement pressure sensors, wherein the unit is m;
rho is the density of the slurry of the absorption tower and has the unit of kg/m3；
g is the acceleration of gravity in m/s2；
Pn and Pn-1The pressure of the position of the measuring point closest to the upper part of the slurry liquid level and the pressure of the position of the next measuring point closest to the measuring point are respectively expressed in KPa;
in the embodiment, in the actual measurement process, the liquid level of the absorption tower is between 8m and 9m, and P is measured10Is 1.824KPa, P9Is 1.823KPa, P84.474KPa, due to P9And P10Pressure value is close and P9And P8The pressure values are greatly different, so that P can be judged9And P10Two measuring points above the slurry level, P8The corresponding station is below the slurry level and the station corresponding to P9 is the closest station position above the slurry level. In addition, the slurry density between points 8 and 9 was 1081kg/m3The gravity acceleration is 9.81m/s2. Fixed segment height (i.e. H)1+H2+……Hn-1) At 8m, the calculated range height was 0.25 m. Therefore, the slurry level height determined in this example was 8.25 m.
Comparative example
The present comparative example provides a method for measuring the liquid level height of an absorption tower, wherein the method adopts a traditional desulfurizing tower liquid level measuring mode, and comprises the following steps:
the traditional liquid level measurement of the desulfurizing tower adopts a pressure transmitter for measurement. Assuming the conventional method of pressure changeThe transmitter was mounted at a 2m position where the pressure was 68.102KPa and the level pressure was 1.823 KPa. Since the average density of the slurry in the absorption tower with the height of more than 2m is larger than that between the measuring points 8 and 9, the density value required by the traditional method is 1100kg/m3. The liquid level height determined by this method is:
therefore, the liquid level heights of the absorption towers determined by the two methods are different, and obviously, the method for measuring the liquid level height of the absorption tower (desulfurizing tower) considering the slurry density difference has more practical guiding significance.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent.
Claims (3)
1. An absorption tower liquid level height measuring device taking into account a difference in slurry density, characterized by comprising: the device comprises a plurality of desulfurization liquid level measurement pressure sensors, wherein the desulfurization liquid level measurement pressure sensors are arranged on the side wall of the absorption tower at equal intervals from the uppermost desulfurization liquid level measurement pressure sensor to the bottom of the absorption tower and are used for measuring the position pressure of a measuring point, and the uppermost desulfurization liquid level measurement pressure sensor is arranged at the position of the highest pressure point of the slurry liquid level.
2. The apparatus of claim 1, wherein the spacing is 1-2 m.
3. The apparatus according to claim 1 or 2, wherein the height of the uppermost desulfurization level measurement pressure sensor is 1-2m higher than the theoretical maximum liquid level height of the absorption tower.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724668A (en) * | 2019-03-05 | 2019-05-07 | 华北电力科学研究院有限责任公司 | A kind of absorbing tower liquid-level height measuring device and method considering serum density difference |
| CN113137995A (en) * | 2020-07-31 | 2021-07-20 | 李凯 | Liquid level measuring method of desulfurization absorption tower |
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2019
- 2019-03-05 CN CN201920279102.XU patent/CN209356016U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724668A (en) * | 2019-03-05 | 2019-05-07 | 华北电力科学研究院有限责任公司 | A kind of absorbing tower liquid-level height measuring device and method considering serum density difference |
| CN109724668B (en) * | 2019-03-05 | 2024-06-25 | 华北电力科学研究院有限责任公司 | Absorption tower liquid level height measuring device and method considering slurry density difference |
| CN113137995A (en) * | 2020-07-31 | 2021-07-20 | 李凯 | Liquid level measuring method of desulfurization absorption tower |
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