CN102455344B - Method for multi-connected sludge specific resistance measurement device - Google Patents
Method for multi-connected sludge specific resistance measurement device Download PDFInfo
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- CN102455344B CN102455344B CN201010516309.8A CN201010516309A CN102455344B CN 102455344 B CN102455344 B CN 102455344B CN 201010516309 A CN201010516309 A CN 201010516309A CN 102455344 B CN102455344 B CN 102455344B
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Abstract
The utility model discloses a multi-connected sludge specific resistance measurement device comprising an experiment table, the bottom of the experiment table is provided with casters, the interior of the experiment table is fixedly provided with a vacuum pump; a table top of the experiment table is fixed with a three-dimensional plate and a tree-form pipe; the table top of the experiment table is internally embedded with a filter flask as well as a plurality of grooves that are internally embedded with metering cylinders provided with Busher funnels; a raised filter nozzle is arranged above each metering cylinder; the filter nozzles of the metering cylinders are respectively connected on one branch pipe of the tree-form pipe by a rubber pipe and a control valve; a main pipe of the tree-form pipe is connected with the filter flask, a vacuum meter and a rotor flow meter; the vacuum meter and the rotor flow meter are fixed on the three-dimensional plate; and the filter flask is connected with the vacuum pump by a pipe. The multi-connected sludge specific resistance measurement device has the advantages of simultaneous conduction on a plurality of groups of data, integration, convenience in moving, high measurement precision, and automatic control.
Description
Technical field
The present invention relates to a kind of measurement mechanism, especially relate to the method for a kind of use eight multi pack sludge specific resistance measurement devices.
Background technology
Resistivity is a major parameter of reflection dewatering performance of sludge, and its physical significance is: when the mud of unit weight filters under a certain pressure, the resistance in unit filter area, the resistance that namely in unit filter area, filter cake per dry wt has.The influence factor that resistivity measures comprises: experimental pressure, solid content and other parameters etc., in this experiment, major parameter is the slope determining t/V ~ V linear regression.Therefore, each parameter of Accurate Determining also reduces experimental error, great on the accuracy impact of experimental result.
At present, the resistivity device that each enterprise, colleges and universities and R&D institution use is many to be assembled by assemblies such as Buchner funnel, metering cylinder, iron stand, tensimeter, bottle,suction and vacuum pumps temporarily, there is cracky, dismounting is consuming time, in suction filtration process, the vertical drip of filtrate very easily causes liquid fluctuating, the shortcomings such as reading error is large.And recently to produce or though the sludge specific resistance measurement device that uses need not be built temporarily, very flexible, and mostly a Buchner funnel and metering cylinder are only housed, single experiment can only be carried out, be unsuitable for many people and use or many group sample Simultaneously test.
Disclose a kind of sludge specific resistance measurement device in Chinese patent literature " sludge specific resistance measurement device " (Authorization Notice No. CN201203605), form cylinder by metering cylinder, Buchner funnel, vacuum meter, suction strainer cylinder, antiaircraft valve, vacuum pump, fixed mount and filter paper placer.Its deficiency is: 1. this device only achieves the integration of a set of suction filtration unit, is only applicable to single single sample independent experiment, and what more than being unfavorable for, group student tested simultaneously carries out, or many group Duplicate Samples are tested simultaneously.2. the swan-neck opening of Buchner funnel lower end is unlimited downward, when dewatering performance of sludge is good, when filtrate is extracted out too fast, very easily occurs dabbling and affects the phenomenon of liquid fluctuating, can not obtain desirable antidrip effect.3. in whole device, the dispersion of the critical piece such as Buchner funnel, suction strainer cylinder, vacuum pump on the table, does not form the device of removable integration, still there is the problem such as dismounting and carrying inconvenience.
Summary of the invention
For problem set forth above, the object of the invention is the method providing a kind of use eight multi pack sludge specific resistance measurement devices.
The present invention is realized by following technical measures, the method of a kind of use eight multi pack sludge specific resistance measurement devices, this eight multi packs sludge specific resistance measurement device comprises the experiment table that bottom is provided with four universal wheels, experiment table internal fixtion is provided with a vacuum pump, damping pad is provided with between experiment table and vacuum pump, the table top of experiment table is fixed with solid panel and a copper tree-like pipe, the table top of experiment table has been embedded in a bottle,suction, the table top of experiment table is also provided with 8 grooves, the base of 8 metering cylinders is fixedly embedded in groove by easily detachable silica gel ring, each metering cylinder nozzle is connected with Buchner funnel by cork, the suction filtration mouth of a protrusion is provided with above metering cylinder, 8 suction filtration mouths are connected to respectively by sebific duct and branch road spherical valve on each arm of copper tree-like pipe, the main of tree-like pipe connects bottle,suction by rubber tube pipe, vacuum meter and spinner-type flowmeter, vacuum meter and spinner-type flowmeter are fixed on solid panel, bottle,suction also connects vacuum pump by rubber tube pipe, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder that the lower end water outlet muzzle of Buchner funnel has plastic material to prepare, this bending guide cylinder is set to the inclination opening that metering cylinder inwall is close on inclined-plane,
First, number per sample, opens the same number of branch road spherical valve, closes other untapped branch road spherical valves, filter paper is put into Buchner funnel, with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile; Then, start vacuum pump, when regulating spinner-type flowmeter to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump; Then, be incorporated in respectively in different Buchner funnel by multiple mud sample to be measured, start vacuum pump and regulate vacuum pressure to measured value, this measured value is no more than 0.1MPa, after reaching this pressure, starts to start stopwatch, writes down the filtrate V in now metering cylinder
0; Every 10s or 15s, after filtering velocity slows down, every 30s or 60s, corresponding amount of filtrate in metering cylinder can be write down when starting to filter; When being filtered to vacuum breaking, turning off the branch road spherical valve of respective branch, regulating spinner-type flowmeter to ensure that the vacuum tightness of whole Analytical system is constant, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
The invention also discloses a kind of method using automatic control type eight multi pack sludge specific resistance measurement device, this automatic control type eight multi pack sludge specific resistance measurement device comprises the experiment table that bottom is provided with four universal wheels, experiment table internal fixtion is provided with a vacuum pump, damping pad is provided with between experiment table and vacuum pump, the table top of experiment table is fixed with solid panel and the tree-like pipe of an aluminium matter, the table top of experiment table has been embedded in a bottle,suction, the table top of experiment table is also provided with 8 grooves, the base of 8 metering cylinders is fixedly embedded in 8 grooves by easily detachable silica gel ring, each metering cylinder nozzle is connected with Buchner funnel by cork, the suction filtration mouth of a protrusion is provided with above metering cylinder, suction filtration mouth is connected on each arm of the tree-like pipe of aluminium matter by sebific duct and solenoid valve, solenoid valve and suction filtration mouth are provided with the baroceptor that is electrically connected solenoid valve, the main of tree-like pipe connects bottle,suction by rubber tube pipe, vacuum meter and spinner-type flowmeter, vacuum meter and spinner-type flowmeter are fixed on solid panel, bottle,suction also connects vacuum pump by rubber tube pipe, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder that the lower end water outlet muzzle of Buchner funnel has plastic material to prepare, this bending guide cylinder is set to the inclination opening that metering cylinder inwall is close on inclined-plane,
First, number per sample, opens the same number of solenoid valve, closes other untapped solenoid valves, filter paper is put into Buchner funnel, with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile; Then, start vacuum pump, when regulating spinner-type flowmeter to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump; Then, be incorporated in respectively in different Buchner funnel by multiple mud sample to be measured, start vacuum pump and regulate vacuum pressure to measured value, this measured value is no more than 0.1MPa, after reaching this pressure, starts to start stopwatch, writes down the filtrate V in now metering cylinder
0; Every 10s or 15s, after filtering velocity slows down, every 30s or 60s, corresponding amount of filtrate in metering cylinder can be write down when starting to filter; When a certain branch road metering cylinder inner filtration is to vacuum breaking, sensed by corresponding baroceptor, control corresponding closed electromagnetic valve, regulate spinner-type flowmeter to ensure that the vacuum tightness of whole Analytical system is constant simultaneously, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
The invention also discloses a kind of multi-connected sludge specific resistance measurement device, comprise the experiment table that bottom is provided with castor, described experiment table internal fixtion is provided with vacuum pump, the table top of described experiment table is fixed with solid panel and a tree-like pipe, the table top of described experiment table has been embedded in bottle,suction, the table top of described experiment table is also provided with multiple groove, each groove is embedded in the metering cylinder that is provided with Buchner funnel, the top of this metering cylinder is provided with the suction filtration mouth of a protrusion, the suction filtration mouth of each metering cylinder is connected on an arm of tree-like pipe respectively by sebific duct and an operation valve, the main pipe of tree-like pipe connects bottle,suction, vacuum meter and spinner-type flowmeter, described vacuum meter and spinner-type flowmeter are fixed on solid panel, described bottle,suction pipe connects vacuum pump.
For ensureing that liquid level is along under inwall steady flow, makes filtrate face steadily rise, improve the precision of reading.At the bending guide cylinder that the lower end water outlet muzzle of described Buchner funnel has plastic material to prepare, this bending guide cylinder is set to the inclination opening that metering cylinder inwall is close on inclined-plane.
A kind of mode automatically controlling the switch of each detection branch according to air pressure, operation valve is the solenoid valve that porch is electrically connected with baroceptor, when the filter of this branch road is to vacuum breaking, respective branch can be closed by automatic control electric magnet valve, thus can ensure that other branch road works on when vacuum tightness is constant.
A kind of manually operated concrete mode, described operation valve is ball valve.
For convenience of the dismounting of metering cylinder, described metering cylinder base is fixedly embedded in groove by easily detachable silica gel ring.
The hollow tubular that the hard such as the preferred copper pipe of described tree-like pipe, aluminum pipe, stainless-steel tube, compo pipe or ebonite pipe are non-friable.
For reducing the impact of vacuum pump work on experiment, between described experiment table and vacuum pump, be provided with damping pad.
Concrete, the bottom of described experiment table is provided with four universal wheels.
Concrete, described Buchner funnel is connected to the nozzle of metering cylinder by cork.
The course of work of the present invention is as follows:
First, number per sample, opens the same number of branch road operation valve, closes other untapped branch road operation valves, filter paper is put into Buchner funnel, with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile.Then, start vacuum pump, when regulating spinner-type flowmeter to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump.Then, multiple mud sample to be measured is incorporated in different Buchner funnel respectively, starts vacuum pump and regulate vacuum pressure to measured value (being no more than 0.1MPa), after reaching this pressure, starting to start stopwatch, write down the filtrate V in now metering cylinder
0.After this at regular intervals (can every 10s or 15s when starting to filter, after filtering velocity slows down can every 30s or 60s) writes down corresponding amount of filtrate in metering cylinder.When being filtered to vacuum breaking, the automatic or manual operation valve turning off respective branch, regulates spinner-type flowmeter to ensure that the vacuum tightness of whole Analytical system is constant, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
The feature of specific resistance measurement device of the present invention is: 1. because branch road is provided with operation valve, often overlaps suction filtration system and does not interfere with each other, and can arrange many cover mud suction filtration resistivity unit in parallel as required, be applicable to the various situations such as single or many people's experiments; 2. baroceptor is utilized automatically to control the mode of the electromagnetic valve switch of each detection branch according to air pressure, when the filter of this branch road is to vacuum breaking, automatically can control this closed electromagnetic valve respective branch, thus can ensure that other branch road works on when vacuum tightness is constant; 3. achieve the integration of package unit all component, effectively make use of the space shared by experimental stand, use carrying flexible; 4. Buchner funnel lower end water outlet muzzle has self-control bending guide pipe, and metering cylinder inwall is close on the inclined-plane of its inclination opening, ensure that liquid level is along under inwall steady flow, makes filtrate face steadily rise, and improves the precision of reading.Meanwhile, because metering cylinder adopts groove and movable silica gel ring to fix, easy accessibility, and this integrated apparatus also can be used for sludge vacuum suction filtration and mass balance measures.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present invention;
Fig. 2 is the structural representation of Buchner funnel of the present invention and metering cylinder;
Fig. 3 is the schematic top plan view of the embodiment of the present invention 1;
Fig. 4 is the schematic top plan view of the embodiment of the present invention 2.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
A kind of eight multi pack sludge specific resistance measurement devices, the main TV structure schematic diagram of Fig. 1, Fig. 3 is schematic top plan view, comprise the experiment table 2 that bottom is provided with four universal wheels 1, experiment table 2 internal fixtion is provided with a vacuum pump 13, damping pad 14 is provided with between experiment table 2 and vacuum pump 13, the table top of experiment table 2 is fixed with solid panel 10 and a copper tree-like pipe 9, the table top of experiment table 2 has been embedded in a bottle,suction 19, the table top of experiment table 2 is also provided with 8 grooves 18, the base of 8 metering cylinders 5 is fixedly embedded in groove 18 by easily detachable silica gel ring, each metering cylinder 5 nozzle is connected with Buchner funnel 7 by cork 6, the suction filtration mouth 15 of a protrusion is provided with above metering cylinder 5, 8 suction filtration mouths 15 are connected to respectively by sebific duct 16 and branch road spherical valve 17 on each arm of copper tree-like pipe 9, the main of tree-like pipe 9 connects bottle,suction 19 by rubber tube pipe, vacuum meter 11 and spinner-type flowmeter 12, vacuum meter 11 and spinner-type flowmeter 12 are fixed on solid panel 10, bottle,suction 19 also connects vacuum pump 13 by rubber tube pipe.Fig. 2 is the structural representation of Buchner funnel 7 and metering cylinder 5, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder 8 that the lower end water outlet muzzle of Buchner funnel 7 has plastic material to prepare, this bending guide cylinder 8 is set to the inclination opening that metering cylinder 5 inwall is close on inclined-plane.
During work, first, number per sample, opens the same number of branch road spherical valve 17, closes other untapped branch road spherical valves, filter paper is put into Buchner funnel 7, with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile.Then, start vacuum pump 13, when regulating spinner-type flowmeter 12 to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump 13.Then, multiple mud sample to be measured is incorporated in different Buchner funnel 7 respectively, starts vacuum pump 13 and regulate vacuum pressure to measured value (being no more than 0.1MPa), after reaching this pressure, starting to start stopwatch, write down the filtrate V in now metering cylinder 5
0.After this at regular intervals (can every 10s or 15s when starting to filter, after filtering velocity slows down can every 30s or 60s) writes down corresponding amount of filtrate in metering cylinder 5.When being filtered to vacuum breaking, turning off the branch road spherical valve 17 of respective branch, regulating spinner-type flowmeter 12 to ensure that the vacuum tightness of whole Analytical system is constant, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
Embodiment 2
A kind of automatic control type eight multi pack sludge specific resistance measurement device, the main TV structure schematic diagram of Fig. 1, Fig. 4 is schematic top plan view, comprise the experiment table 2 that bottom is provided with four universal wheels 1, experiment table 2 internal fixtion is provided with a vacuum pump 13, damping pad 14 is provided with between experiment table 2 and vacuum pump 13, the table top of experiment table 2 is fixed with solid panel 10 and the tree-like pipe 9 of an aluminium matter, the table top of experiment table 2 has been embedded in a bottle,suction 19, the table top of experiment table 2 is also provided with 8 grooves 18, the base of 8 metering cylinders 5 is fixedly embedded in 8 grooves 18 by easily detachable silica gel ring, each metering cylinder 5 nozzle is connected with Buchner funnel 7 by cork 6, the suction filtration mouth 15 of a protrusion is provided with above metering cylinder 5, suction filtration mouth 15 is connected on each arm of the tree-like pipe of aluminium matter 9 by sebific duct 16 and solenoid valve 20, solenoid valve 20 and suction filtration mouth 15 are provided with the baroceptor 21 that is electrically connected solenoid valve 20, the main of tree-like pipe 9 connects bottle,suction 19 by rubber tube pipe, vacuum meter 11 and spinner-type flowmeter 12, vacuum meter 11 and spinner-type flowmeter 12 are fixed on solid panel 10, bottle,suction 19 also connects vacuum pump 13 by rubber tube pipe.Fig. 2 is the structural representation of Buchner funnel 7 and metering cylinder 5, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder 8 that the lower end water outlet muzzle of Buchner funnel 7 has plastic material to prepare, this bending guide cylinder 8 is set to the inclination opening that metering cylinder 5 inwall is close on inclined-plane.
During work, first, number per sample, opens the same number of solenoid valve 20, closes other untapped solenoid valves, filter paper is put into Buchner funnel 7, with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile.Then, start vacuum pump 13, when regulating spinner-type flowmeter 12 to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump 13.Then, multiple mud sample to be measured is incorporated in different Buchner funnel 7 respectively, starts vacuum pump 13 and regulate vacuum pressure to measured value (being no more than 0.1MPa), after reaching this pressure, starting to start stopwatch, write down the filtrate V in now metering cylinder 5
0.After this at regular intervals (can every 10s or 15s when starting to filter, after filtering velocity slows down can every 30s or 60s) writes down corresponding amount of filtrate in metering cylinder 5.When a certain branch road metering cylinder 5 inner filtration is to vacuum breaking, sensed by corresponding baroceptor 21, control corresponding solenoid valve 20 to close, regulate spinner-type flowmeter 12 to ensure that the vacuum tightness of whole Analytical system is constant simultaneously, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
More than that multi-connected sludge specific resistance measurement device of the present invention is set forth; the present invention is understood for helping; but embodiments of the present invention are not restricted to the described embodiments; any do not deviate from the principle of the invention under do change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. one kind uses the method for eight multi pack sludge specific resistance measurement devices, this eight multi packs sludge specific resistance measurement device comprises the experiment table (2) that bottom is provided with four universal wheels (1), experiment table (2) internal fixtion is provided with a vacuum pump (13), damping pad (14) is provided with between experiment table (2) and vacuum pump (13), the table top of experiment table (2) is fixed with solid panel (10) and a copper tree-like pipe (9), the table top of experiment table (2) has been embedded in a bottle,suction (19), the table top of experiment table (2) is also provided with 8 grooves (18), the base of 8 metering cylinders (5) is fixedly embedded in groove (18) by easily detachable silica gel ring, each metering cylinder (5) nozzle is connected with Buchner funnel (7) by cork (6), the suction filtration mouth (15) of a protrusion is provided with in the top of metering cylinder (5), 8 suction filtration mouths (15) are connected to respectively by sebific duct (16) and branch road spherical valve (17) on each arm of copper tree-like pipe (9), the main of tree-like pipe (9) connects bottle,suction (19) by rubber tube pipe, vacuum meter (11) and spinner-type flowmeter (12), vacuum meter (11) and spinner-type flowmeter (12) are fixed on solid panel (10), bottle,suction (19) also connects vacuum pump (13) by rubber tube pipe, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder (8) that the lower end water outlet muzzle of Buchner funnel (7) has plastic material to prepare, this bending guide cylinder (8) is set to the inclination opening being close to metering cylinder (5) inwall in inclined-plane,
It is characterized in that, first, number per sample, open the same number of branch road spherical valve (17), close other untapped branch road spherical valves, filter paper is put into Buchner funnel (7), with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile; Then, start vacuum pump (13), when regulating spinner-type flowmeter (12) to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump (13); Then, multiple mud sample to be measured is incorporated in respectively in different Buchner funnel (7), start vacuum pump (13) and regulate vacuum pressure to measured value, this measured value is no more than 0.1MPa, after reaching this pressure, start to start stopwatch, write down the filtrate V in now metering cylinder (5)
0; Every 10s or 15s, after filtering velocity slows down, every 30s or 60s, corresponding amount of filtrate in metering cylinder (5) can be write down when starting to filter; When being filtered to vacuum breaking, turn off the branch road spherical valve (17) of respective branch, regulate spinner-type flowmeter (12) to ensure that the vacuum tightness of whole Analytical system is constant, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
2. one kind uses the method for automatic control type eight multi pack sludge specific resistance measurement device, this automatic control type eight multi pack sludge specific resistance measurement device comprises the experiment table (2) that bottom is provided with four universal wheels (1), experiment table (2) internal fixtion is provided with a vacuum pump (13), damping pad (14) is provided with between experiment table (2) and vacuum pump (13), the table top of experiment table (2) is fixed with solid panel (10) and the tree-like pipe of an aluminium matter (9), the table top of experiment table (2) has been embedded in a bottle,suction (19), the table top of experiment table (2) is also provided with 8 grooves (18), the base of 8 metering cylinders (5) is fixedly embedded in 8 grooves (18) by easily detachable silica gel ring, each metering cylinder (5) nozzle is connected with Buchner funnel (7) by cork (6), the suction filtration mouth (15) of a protrusion is provided with in the top of metering cylinder (5), suction filtration mouth (15) is connected on each arm of the tree-like pipe of aluminium matter (9) by sebific duct (16) and solenoid valve (20), solenoid valve (20) and suction filtration mouth (15) are provided with the baroceptor (21) that is electrically connected solenoid valve (20), the main of tree-like pipe (9) connects bottle,suction (19) by rubber tube pipe, vacuum meter (11) and spinner-type flowmeter (12), vacuum meter (11) and spinner-type flowmeter (12) are fixed on solid panel (10), bottle,suction (19) also connects vacuum pump (13) by rubber tube pipe, for ensureing that liquid level is along under inwall steady flow, filtrate face is made steadily to increase, improve the precision of reading, at the bending guide cylinder (8) that the lower end water outlet muzzle of Buchner funnel (7) has plastic material to prepare, this bending guide cylinder (8) is set to the inclination opening being close to metering cylinder (5) inwall in inclined-plane,
It is characterized in that, first, number per sample, open the same number of solenoid valve (20), close other untapped solenoid valves, filter paper is put into Buchner funnel (7), with water-wet and be adjacent to week the end, whether leak gas between testing fixture respectively connects meanwhile; Then, start vacuum pump (13), when regulating spinner-type flowmeter (12) to make vacuum pressure be approximately 2/3 of experimental pressure, turn off vacuum pump (13); Then, multiple mud sample to be measured is incorporated in respectively in different Buchner funnel (7), start vacuum pump (13) and regulate vacuum pressure to measured value, this measured value is no more than 0.1MPa, after reaching this pressure, start to start stopwatch, write down the filtrate V in now metering cylinder (5)
0; Every 10s or 15s, after filtering velocity slows down, every 30s or 60s, corresponding amount of filtrate in metering cylinder (5) can be write down when starting to filter; When a certain branch road metering cylinder (5) inner filtration is to vacuum breaking, sensed by corresponding baroceptor (21), control corresponding solenoid valve (20) to close, regulate spinner-type flowmeter (12) to ensure that the vacuum tightness of whole Analytical system is constant simultaneously, as filter cake does not chap for a long time, then can stop after filtering 20min measuring.
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| CN103063817B (en) * | 2012-12-20 | 2015-07-01 | 华南理工大学 | System of measuring sludge dewatering performance |
| CN103230689A (en) * | 2013-04-02 | 2013-08-07 | 广州市刑事科学技术研究所 | Vacuum pumping filtration instrument |
| CN104258610B (en) * | 2014-09-28 | 2015-12-02 | 国家电网公司 | A kind of heavy metal-containing waste water batch filter and method |
| CN106990017B (en) * | 2017-05-19 | 2023-04-07 | 河南工程学院 | Automatic sludge specific resistance measuring device and measuring method |
| CN113634027B8 (en) * | 2021-07-04 | 2023-03-14 | 林哲鑫 | Suction filtration experimental device and method |
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| CN201083667Y (en) * | 2007-09-24 | 2008-07-09 | 浙江林学院 | Porous material density measurement apparatus |
| CN201203605Y (en) * | 2008-05-15 | 2009-03-04 | 同济大学 | Apparatus for measuring sludge specific resistance |
| CN201828559U (en) * | 2010-10-22 | 2011-05-11 | 宇星科技发展(深圳)有限公司 | Multi-connected sludge specific resistance measurement device |
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