CN113848149A - Full-range sampling concentration tower slurry density measuring device and using method - Google Patents
Full-range sampling concentration tower slurry density measuring device and using method Download PDFInfo
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- CN113848149A CN113848149A CN202110755639.0A CN202110755639A CN113848149A CN 113848149 A CN113848149 A CN 113848149A CN 202110755639 A CN202110755639 A CN 202110755639A CN 113848149 A CN113848149 A CN 113848149A
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- 238000005070 sampling Methods 0.000 title claims abstract description 135
- 239000002002 slurry Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000001739 density measurement Methods 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 239000006260 foam Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- 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
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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Abstract
The invention relates to the technical field of density measurement of wastewater treatment systems, and provides a full-range sampling concentration tower slurry density measuring device and a using method thereof. The bearing metering unit comprises a bearing box, a bearing box liquid level meter, a pulley, a guide rail, a bearing telescopic spring, a travel switch and a bearing platform; the concentrated tower slurry enters the bearing box through a sampling gun, a sampling pipe, a sampling valve and a sampling pump of the full-range sampling unit, the bearing box compresses a bearing expansion spring to descend, the travel switch senses the descending position of the bearing box, the bearing box liquid level meter measures the height of liquid in the bearing box, and after the measurement is completed, the process water washes the sampling pipeline and the bearing box and discharges the liquid to a trench through the discharge unit for recovery. The invention overcomes the difficult problem that the density is difficult to measure due to large slurry disturbance and large density, improves the precision of measuring the slurry density of the concentration tower and has important significance.
Description
Technical Field
The invention belongs to the technical field of density measurement of wastewater treatment systems, and particularly relates to a full-range sampling concentration tower slurry density measuring device and a using method thereof.
Background
In a wastewater treatment system, the accurate measurement of the slurry density of a concentration tower relates to the safe and stable operation of the whole system, and the current commonly used online slurry density measurement method comprises a double-differential-pressure liquid level measurement mode and a mode of arranging an online density measuring instrument on a pipeline. The double-differential pressure liquid level measurement mode is influenced by disturbance of devices such as a stirrer and the like and foam, and measurement accuracy is influenced due to unstable measurement values. Because concentration tower thick liquid density is high, has strict restriction again to the velocity of flow of thick liquid on the linear density appearance, influences measurement accuracy when the velocity of flow is high, and the pipeline blocks up easily when the velocity of flow is low, can't stabilize accurate measurement. And density measurement in any mode is only aiming at the density in a certain slurry range, and the density measurement in a full-range sampling mode cannot be realized, so that the density measurement device is not representative, and the density measurement device for the slurry in the concentration tower, which can realize the full-range sampling mode, is provided, and has important significance for improving the operation stability and reliability of a wastewater treatment system.
Disclosure of Invention
The invention provides a full-range sampling concentration tower slurry density measuring device and a using method thereof, which are used for solving the technical problem that the concentration tower slurry cannot be stably and accurately measured.
In order to achieve the purpose, the invention adopts the following technical scheme: a full-range sampling concentration tower slurry density measuring device comprises a bearing metering unit, a full-range sampling unit and a discharging unit, wherein the bearing metering unit comprises a bearing box, a bearing box liquid level meter, a pulley, a guide rail, a plurality of bearing expansion springs, a travel switch and a bearing platform, the bearing expansion springs are arranged at the top end of the bearing platform, the bearing box is arranged at the top end of the bearing expansion springs, the guide rail is vertically fixed on one side of the bearing box at the top end of the bearing platform, the pulley is fixed on the bearing box and slides along the guide rail, the bearing box liquid level meter is installed on the bearing box, and the travel switch is installed on the guide rail and extends to the lower part of the bearing box; the full-range sampling unit comprises a concentration tower, a sampling gun, a sampling pipe, a sampling valve, a process water replenishing valve and a sampling pump, wherein the sampling gun penetrates through the concentration tower, the outer end of the sampling gun is communicated with the top end of a bearing box through the sampling pipe and the sampling valve, the process water replenishing valve is communicated with an inlet of the sampling pump, the sampling gun and the sampling pipe are positioned below the liquid level in the concentration tower, and the sampling gun is vertically telescopic and is electrically telescopic with controllable length and telescopic speed; the discharge unit comprises a bearing box discharge pipe communicated with the bottom end of the bearing box, a bearing box discharge valve arranged on the bearing box discharge pipe and a trench positioned at the tail end of the bearing box discharge pipe.
By adopting the technical scheme, the telescopic sampling gun is adopted, the length of the sampling gun can cover different heights of the concentration tower, the full-range sampling is realized, and the measured density is representative; one side of bearing box sets up travel switch, can stop the sample and indirect measurement concentration tower thick liquid density of mode of reading liquid level height after the quality in the weighing box reaches the standard, overcome because the influence of the disturbance of devices such as agitator and foam leads to measuring the unstable difficult problem of numerical value, also overcome because concentration tower thick liquid density is high, the unstable difficult problem that can't use online densimeter of reasons such as easy jam pipeline of velocity of flow, to improving waste water treatment system operating stability and reliability.
Preferably, the sampling gun includes the shell with the sampling tube intercommunication, with the telescopic joint of shell intercommunication, rotate the winding axle of installation in the shell, twine on the winding axle and through the stay cord of telescopic joint, fix the lifter at the stay cord end, the telescopic joint is along vertical setting, and the lifter is located the bottom of telescopic joint and length is greater than the diameter of telescopic joint bottom, the winding hub connection has the flexible motor that is located the shell outside.
Through adopting above-mentioned technical scheme, the telescopic joint has the trend of stretching out under the effect of gravity, and stay cord and lifter mention the telescopic joint to can be through the height of flexible motor control telescopic joint.
Preferably, the telescopic range of the sampling gun is 3-8m, and the telescopic joint is 3-7 sections.
By adopting the technical scheme, full-range sampling of the slurry of the concentrating tower can be realized, and the selected telescopic range in the embodiment is 4 m.
Preferably, the liquid level meter of the bearing box is a liquid level meter with a remote signal, the measuring range of the liquid level meter of the bearing box is 0.1-2 m, the data is accurate, and the operation is simple.
Preferably, the diameter of the bottom surface of the bearing box ranges from 0.2m to 2 m.
Through adopting above-mentioned technical scheme, the volume of bearing box is suitable, and easy measurement volume just discharges easily.
Preferably, the sampling valve and the process water replenishing valve are pneumatic valves.
By adopting the technical scheme, the adjustable ratio is large, the sealing effect is good, the adjusting performance is sensitive, the size is small, and the vertical and horizontal installation can be realized.
Preferably, the flow rate of the sampling pump ranges from 1m3/h to 20m 3/h.
Through adopting above-mentioned technical scheme, sampling efficiency and effect are better, and in this embodiment, the sampling pump is impeller pump and flow is 5m 3/h.
Preferably, the pipe diameter of the bearing box discharge pipe ranges from 100mm to 400 mm.
Through adopting above-mentioned technical scheme, emission efficiency and effect are better, and the diameter is 300mm in this embodiment.
Preferably, the number of the load-bearing expansion springs is 2-5.
Through adopting above-mentioned technical scheme, play better support and elasticity effect to the bearing box.
The application method of the full-range sampling concentration tower slurry density measuring device comprises the following steps,
s1: closing a discharge valve of the bearing box, and opening a process water replenishing valve to replenish water to the bearing box; setting an initial value M of the density measurement times to be 0; manually setting the measurement cycle number N;
s2: waiting until the travel switch acts, closing the process water replenishing valve, and recording the measurement value L1 of the liquid level meter of the bearing box;
s3: opening a drain valve of the bearing box, delaying the time T1 and ensuring that the liquid in the bearing box is emptied;
s4: closing a discharge valve of the bearing box, opening a sampling valve, starting a sampling pump, starting a sampling gun to extend, conveying slurry of the concentration tower to the bearing box, retracting the sampling gun to an initial shortest position when the sampling gun extends to the longest position, and performing next cycle of expansion and contraction if a travel switch does not act; setting the extension speed to enable the bearing box to descend to the travel switch to act in one telescopic period of the sampling gun;
s5: waiting until the travel switch acts, stopping the sampling pump, closing the sampling valve, shortening the sampling gun to the shortest, and recording the measurement value L2 of the liquid level meter of the bearing box;
s6: calculating the density of the slurry in the bearing box at the moment
S7: opening the load bearing tank drain valve for a time delay T2;
s8: opening a process water replenishing valve to flush the sampling pipeline and the bearing box, and delaying T3;
s9: closing the process water replenishing valve; the density measurement times M is M + 1;
s10: if M < N, returning to step S3; if M is equal to N, the process returns to step S1.
The invention has the beneficial effects that: the telescopic sampling gun is adopted, the length of the sampling gun can cover different heights of the slurry in the concentration tower, full-range sampling is realized, and the measured density is representative; one side of bearing box sets up travel switch, can stop the sample and indirect measurement concentration tower thick liquid density of mode of reading liquid level height after the quality in the weighing box reaches the standard, overcome because the influence of the disturbance of devices such as agitator and foam leads to measuring the unstable difficult problem of numerical value, also overcome because concentration tower thick liquid density is high, the unstable difficult problem that can't use online densimeter of reasons such as easy jam pipeline of velocity of flow, to improving waste water treatment system operating stability and reliability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic structural diagram of a full-range sampling concentrating tower slurry density measuring device and a use method thereof according to the present invention;
FIG. 2 is a schematic structural diagram of a sampling gun of a slurry density measuring device of a full-range sampling concentration tower.
Reference numerals: 1. a bearing box; 2. a load bearing tank level gauge; 3. a pulley; 4. a guide rail; 5. a load-bearing extension spring; 6. a travel switch; 7. a load-bearing platform; 8. a concentration tower; 9. a sampling gun; 91. a housing; 92. an expansion joint; 93. a winding shaft; 94. Pulling a rope; 95. lifting a rod; 96. a telescopic motor; 10. a sampling tube; 11. a sampling valve; 12. a process water replenishing valve; 13. a sampling pump; 14. a bearing box discharge pipe; 15. a load bearing tank drain valve; 16. and (4) digging a trench.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and illustrating the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
As shown in fig. 1, a full-range sampling concentration tower slurry density measuring device comprises a bearing metering unit, a full-range sampling unit and a discharging unit, wherein the bearing metering unit comprises a bearing box 1, a bearing box liquid level meter 1, a pulley 3, a guide rail 4, a plurality of bearing expansion springs 5, a travel switch 6 and a bearing platform 7, the bearing expansion springs 5 are arranged at the top end of the bearing platform 7, the bearing box 1 is arranged at the top end of the bearing expansion springs 5, the guide rail 4 is vertically fixed at one side of the bearing box 1 at the top end of the bearing platform 7, the pulley 3 is fixed on the bearing box 1 and slides along the guide rail 4, the bearing box liquid level meter 1 is installed on the bearing box 1, and the travel switch 6 is installed on the guide rail 4 and extends to the lower part of the bearing box 1; the full-range sampling unit comprises a concentration tower 8, a sampling gun 9, a sampling pipe 10, a sampling valve 11, a process water replenishing valve 12 and a sampling pump 13, wherein the sampling gun 9 penetrates through the concentration tower 8, the outer end of the sampling gun is communicated with the top end of a bearing box 1 through the sampling pipe 10 and the sampling valve 11, the process water replenishing valve 12 is communicated with an inlet of the sampling pump 13, the sampling gun 9 and the sampling pipe 10 are positioned below the liquid level in the concentration tower 8, and the sampling gun 9 is vertically telescopic and is electrically telescopic with controllable length and telescopic speed; the discharge unit comprises a bearing box discharge pipe 14 communicated with the bottom end of the bearing box 1, a bearing box discharge valve 15 arranged on the bearing box discharge pipe 14 and a trench 16 positioned at the tail end of the bearing box discharge pipe 14.
By adopting the telescopic sampling gun 9, the length of the sampling gun 9 can cover the slurries with different heights of the concentration tower 8, so that the full-range sampling is realized, and the measured density is representative; one side of bearing box 1 sets up travel switch 6, can stop the sample and the indirect measurement of 8 thick liquids density of concentration tower of mode of reading liquid level height again after the quality in the weighing box reaches the standard, overcome because the disturbance of devices such as agitator and the influence of foam lead to measuring the unstable difficult problem of numerical value, also overcome because 8 thick liquids density of concentration tower is high, the velocity of flow is unstable to block up the difficult problem that the online densimeter can't be used to reasons such as pipeline easily, have the significance to improvement waste water treatment system operating stability and reliability.
This embodiment provides a structure of sampling rifle 9, sampling rifle 9 includes shell 91 with the thief tube 10 intercommunication, telescopic joint 92 with shell 91 intercommunication, the winding axle 93 of installing in shell 91 rotates, twine on winding axle 93 and through telescopic joint 92's stay cord 94, fix at the terminal lifter 95 of stay cord, telescopic joint 92 is along vertical setting, lifter 95 is located telescopic joint 92's bottom and length is greater than the diameter of telescopic joint 92 bottom, winding axle 93 is connected with the flexible motor 96 that is located the shell 91 outside. The telescopic joint 92 is a telescopic pipe which is sleeved in multiple sections, the end part of each section of the telescopic joint is provided with a clamping section connected with an adjacent section, the telescopic joint 92 has the extending trend under the action of gravity, and the telescopic joint is lifted by the pull rope 94 and the lifting rod 95, so that the height of the telescopic joint 92 can be controlled by the telescopic motor 96. The telescopic range of the sampling gun 9 is 3-8m, the telescopic section is 3-7 sections, the full-range sampling of the slurry of the concentration tower 8 can be realized, and the telescopic range is 4m in the embodiment.
The bearing box liquid level meter 1 is a liquid level device with a remote transmission signal, such as a magnetic turning plate liquid level meter, a radar liquid level meter and the like, and has accurate data and simple operation. The measuring range of the bearing box liquid level meter 1 is 0.1 m-2 m, the data is accurate, the operation is simple, and the diameter range of the bottom surface of the bearing box 1 is 0.2 m-2 m. In this embodiment, the measuring range of the weighing tank liquid level meter is 2m, and the diameter of the bottom surface of the bearing tank 1 is 0.5 m.
The sampling valve 11 and the process water replenishing valve 12 are pneumatic valves, and have the advantages of large adjustable ratio, good sealing effect, sensitive adjusting performance, small volume and capability of being vertically and horizontally installed. The sampling pump 13 can be a positive displacement pump or an impeller pump, the flow rate range is 1m 3/h-20 m3/h, the sampling efficiency and the effect are good, in the embodiment, the sampling pump 13 is an impeller pump, and the flow rate is 5m 3/h.
The pipe diameter range of bearing box discharge pipe 14 is 100mm ~ 400mm, and discharge efficiency and effect are better, and the diameter is 300mm in this embodiment. The number of the bearing extension springs 5 is 2-5, which can support and stretch the bearing box 1 well, and 4 are selected in the embodiment.
The application method of the full-range sampling concentration tower slurry density measuring device comprises the following steps,
s1: closing a discharge valve 15 of the bearing box, and opening a process water replenishing valve 12 to replenish water to the bearing box 1; setting an initial value M of the density measurement times to be 0; manually setting the measurement cycle number N;
s2: waiting until the travel switch 6 acts, closing the process water replenishing valve 12, and recording the measured value L1 of the bearing box liquid level meter 1;
s3: opening the bearing box discharge valve 15, delaying for a time T1 to ensure that the bearing box 1 is emptied of liquid;
s4: closing a discharge valve 15 of the bearing box, opening a sampling valve 11, starting a sampling pump 13, starting extension of a sampling gun 9, conveying slurry of a concentration tower 8 to the bearing box 1, starting retraction to the initial shortest position when the sampling gun 9 extends to the longest position, and performing extension and retraction in the next period if a travel switch 6 does not act; setting the extension speed to enable the bearing box 1 to descend to the travel switch 6 to act in one expansion period of the sampling gun 9;
s5: waiting until the travel switch 6 acts, stopping the sampling pump 13, closing the sampling valve 11, shortening the sampling gun 9 to the shortest length, and recording a measured value L2 of the liquid level meter 1 of the bearing box;
s6: calculate the density of the slurry in the load bearing tank 1 at this time
S7: opening the load bearing tank drain valve 15 for a time delay T2;
s8: opening a process water replenishing valve 12 to flush the sampling pipe 10 and the bearing box 1, and delaying T3;
s9: closing the process water replenishing valve 12; the density measurement times M is M + 1;
s10: if M < N, returning to step S3; if M is equal to N, the process returns to step S1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a full range sample enrichment tower thick liquid density measurement device which characterized in that: the device comprises a bearing metering unit, a full-range sampling unit and a discharging unit, wherein the bearing metering unit comprises a bearing box (1), a bearing box liquid level meter (2), a pulley (3), a guide rail (4), a plurality of bearing expansion springs (5), a travel switch (6) and a bearing platform (7), the bearing expansion springs (5) are arranged at the top end of the bearing platform (7), the bearing box (1) is arranged at the top end of the bearing expansion springs (5), the guide rail (4) is vertically fixed on one side of the bearing box (1) at the top end of the bearing platform (7), the pulley (3) is fixed on the bearing box (1) and slides along the guide rail (4), the bearing box liquid level meter (2) is installed on the bearing box (1), and the travel switch (6) is installed on the guide rail (4) and extends to the lower part of the bearing box (1); the full-range sampling unit comprises a concentration tower (8), a sampling gun (9), a sampling pipe (10), a sampling valve (11), a process water replenishing valve (12) and a sampling pump (13), wherein the sampling gun (9) penetrates through the concentration tower (8) and the outer end of the sampling gun passes through the sampling pipe (10), the sampling valve (11) is communicated with the sampling pump (13) at the top end of a bearing box (1), the process water replenishing valve (12) is communicated with an inlet of the sampling pump (13), the sampling gun (9) and the sampling pipe (10) are positioned below the liquid level in the concentration tower (8), and the sampling gun (9) is vertically telescopic and is electrically telescopic with controllable length and telescopic speed; the discharge unit comprises a bearing box discharge pipe (14) communicated with the bottom end of the bearing box (1), a bearing box discharge valve (15) arranged on the bearing box discharge pipe (14) and a trench (16) positioned at the tail end of the bearing box discharge pipe.
2. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: sampling gun (9) include shell (91) with sampling tube (10) intercommunication, telescopic joint (92) with shell (91) intercommunication, rotate and install winding axle (93) in shell (91), twine on winding axle (93) and through stay cord (94) of telescopic joint (92), fix lifting lever (95) at the stay cord end, telescopic joint (92) are along vertical setting, and lifting lever (95) are located the bottom of telescopic joint (92) and the diameter that length is greater than telescopic joint (92) bottom, winding axle (93) are connected with flexible motor (96) that are located the shell (91) outside.
3. The full range sampling concentrating tower slurry density measuring device according to claim 2, wherein: the telescopic range of the sampling gun (9) is 3-8m, and the telescopic section is 3-7 sections.
4. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the load-bearing box liquid level meter (2) is a liquid level device with a remote transmission signal, and the measurement range of the load-bearing box liquid level meter (2) is 0.1-2 m.
5. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the diameter range of the bottom surface of the bearing box (1) is 0.2-2 m.
6. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the sampling valve (11) and the process water replenishing valve (12) are pneumatic valves.
7. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the flow range of the sampling pump (13) is 1m 3/h-20 m 3/h.
8. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the diameter range of the bearing box discharge pipe (14) is 100-400 mm.
9. The full range sampling concentrating tower slurry density measuring device according to claim 1, wherein: the number of the load-bearing expansion springs (5) is 2-5.
10. The use of the full range sampling concentrating tower slurry density measuring device according to any one of claims 1-9, wherein: comprises the following steps of (a) carrying out,
s1: closing a discharge valve (15) of the bearing box, and opening a process water replenishing valve (12) to replenish water to the bearing box (1); setting an initial value M of the density measurement times to be 0; manually setting the measurement cycle number N;
s2: waiting until the travel switch (6) acts, closing the process water replenishing valve (12), and recording the measured value L1 of the bearing box liquid level meter (2);
s3: opening a bearing box discharge valve (15) and delaying for a time T1 to ensure that the liquid in the bearing box (1) is emptied;
s4: closing a discharge valve (15) of a bearing box, opening a sampling valve (11), starting a sampling pump (13), starting a sampling gun (9) to extend, conveying concentrated tower slurry to the bearing box (1), retracting the sampling gun (9) to the initial shortest position when the sampling gun (9) extends to the longest position, and performing next cycle of expansion and contraction if a travel switch (6) does not act; setting the extension speed to enable the bearing box to descend to the travel switch (6) to act in one telescopic period of the sampling gun;
s5: waiting until the stroke switch (6) acts, stopping the sampling pump (13), closing the sampling valve (11), shortening the sampling gun (9) to the shortest, and recording a measured value L2 of the load-bearing box liquid level meter (2);
s6: calculating the density of the slurry in the bearing box at the moment
S7: opening the load bearing tank drain valve (15) for a time delay T2;
s8: opening a process water replenishing valve (12) to flush the sampling pipeline and the bearing box (1), and delaying T3;
s9: closing the process water replenishing valve (12); the density measurement times M is M + 1;
s10: if M < N, returning to step S3; if M is equal to N, the process returns to step S1.
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