CN104251900B - A kind of slurries quality measurement supervising device and measuring and monitoring method - Google Patents
A kind of slurries quality measurement supervising device and measuring and monitoring method Download PDFInfo
- Publication number
- CN104251900B CN104251900B CN201410417588.0A CN201410417588A CN104251900B CN 104251900 B CN104251900 B CN 104251900B CN 201410417588 A CN201410417588 A CN 201410417588A CN 104251900 B CN104251900 B CN 104251900B
- Authority
- CN
- China
- Prior art keywords
- slurries
- magnetic valve
- measuring cylinder
- absorption tower
- pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention provides a kind of slurries quality measurement supervising device, and fixed volume slurries in timing acquiring absorption tower are relatively isolated in space at one, and conversion is measured to serum density by volume Weighing method, it is accurate to calculate quick and numerical value；Device can carry the instruments such as weighing instrument, pH instrument, conductance analysis simultaneously, and to slurries, other compositions detect；The density of slurries is tested by automatic on-line device the real time measure, and by formula P=ρ gh, pulp level h=P/ ρ g in absorption tower are back-calculated to obtain, so as to control pulp level in absorption tower；The present apparatus installs PH, conductance, OPR above slurries measuring cylinder simultaneously（The oxidation-reduction potential of solution）Electrode can be taken out at any time, and it is rinsed, therefore avoid generation of the desulfurization slurry its surface scale phenomena such as after operation long-time, ensure that the accuracy of system, increase the life-span of electrode.
Description
Technical field
The present invention relates to being tested or the technical field of analysis of material by means of determining the chemically or physically property of material, tool
Body is related to a kind of slurries quality measurement supervising device and measuring and monitoring method.
Background technology
The absorption tower serosity density measurement method that power plant uses at present is that about 2 are opened in absorption tower bottom at a distance of 1 meter of height
The measured hole of difference is spent, slurry pressure at 2 measured holes is measured, according to liquid pressure formula P=ρ gh in PLC, calculates absorption
In good time density in tower, liquid pressure formula is packed into again further according to the density and absorption tower lower slurry pressure measuring value calculated
P=ρ gh, the in good time liquid level on absorption tower is calculated, is shown for host computer.
Said apparatus calculates to exist in precision, sensitivity, Measurement reliability and the plant maintenance of display in parameter measurement to be permitted
More defects and inconvenience：
1st, the measuring method precision directly depends on the measurement error of 2 pressure measurement points, because slurries are dense in absorption tower
Degree and slurries containing limestone serous and gypsum particle are bigger, the blocking of pressure samples mouth are often resulted in, to pressure measurement accuracy and sensitive
Degree influence is very big, causes operations staff to cause to judge by accident to serum density, liquid level in absorption tower, influences unit fume emission index
Control and equipment it is safe for operation；
2nd, the measuring method causes line clogging to down-sample formation lime stone or gypsum slurries deposition in pipeline, is
By the adherent installation on tower wall is absorbed of 2 pressure transmitters, an isolating door is not installed, if measured hole has exception, it is necessary to stop
Only unit operation, and slurries in absorption tower are emptied, can be handled, processing defect do homework it is extremely complex cumbersome, it is right
Repair and maintenance work brings sizable difficulty；
3rd, the measuring method can not carry out the real-time testing and prison of slurry pH value, OPR values and conductivity values effective and rapidly
Control.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of slurries quality measurement supervising device, the present apparatus can be at one
Fixed volume slurries in timing acquiring absorption tower are relatively isolated in space, serum density is surveyed by volume-Weighing method
Amount conversion, calculate fast and numerical value is accurate, be also convenient for overhauling equipment, while PH, OPR, conduction are carried out to collection slurries
Rate measures, and is uploaded to desulfurization PLC control system.
In order to solve the above technical problems, the present invention relates to a kind of slurries quality measurement supervising device, including cabinet and setting
Measurement zone and control zone inside cabinet, the measurement zone include sampler and weighing device, set in the control zone
PLC, the PLC include logic unit and control unit, described control unit connection instrument, and the instrument includes exploring block
（That is the electrode of instrument）And display unit（Gauge outfit）；The sampler is cylindrical measuring cylinder, the exploring block of the instrument
Stretch into inside measuring cylinder, and do not contacted with measuring cylinder inwall at measuring cylinder upper opening；The weighing device is weighing and sensing
Device, measuring cylinder lower end set pillar, and it is fixed on weighing sensor by pillar；Pulp-inlet pipe road is set in the cabinet, entered
Waterpipe and discharge tube, each pipeline are connected with measuring cylinder respectively, the sampling pipe on pulp-inlet pipe road connection slurries absorption tower,
Inlet channel connects flushing water pipeline, and discharge tube connects absorption tower plasma discharge raceway groove, magnetic valve is set respectively on the pipeline；Institute
Weighing sensor and magnetic valve is stated to be connected with PLC control unit respectively；The measurement supervising device is arranged at outside absorption tower.
Overflow pipe is set in measuring cylinder, and liquid level is maintained at below the overflow pipe mouth of pipe in bucket.
Preferably, mobile protective cover is set above cabinet, and the protective cover is slab construction or triangular prism structure.Protection
The setting of cover can be with rain and snow, dust-proof, and protects internal unit, and be arranged to movable type facilitates staff according to working environment
Needs choose whether with protective cover close cabinet.
Preferably, instrument includes pH analyzers, OPR（The oxidation-reduction potential of solution）Analyzer and conductance analyzer,
Wherein pH analyzers include two.Because desulfurization exists using lime stone-gypsum wet desulfurization technology, bottom oxide regions
Run under low pH value, be advantageous to the dissolving of lime stone, be advantageous to the reaction of formation of by-produced gypsum, therefore plasm PH value in desulfurizing tower
It must control between 5.2 ~ 5.8, by measuring the electrode potential of slurries, calculate slurries aeration efficiency.
Preferably, control zone sets touch LCD screen, with PLC（S7-200PLC）Control unit is connected.Touch
Formula LCDs is installed on the spot in control zone, and the logic unit program that can carry out bit manipulation and the next S7-200PLC is compiled
Write, program therein is existing general controls technology.
Preferably, Backwash pipeline, the sampling pipe on Backwash pipeline connection slurries absorption tower, institute are set on pulp-inlet pipe road
State and backwashing solenoid valve is set in Backwash pipeline.The setting function of Backwash pipeline is when pulp-inlet pipe road blocks, and can be beaten
The back flush valves in Backwash pipeline are opened to be backwashed to pulp-inlet pipe road.
Present invention simultaneously provides a kind of slurries quality measurement monitoring method based on above-mentioned slurries quality measurement supervising device,
Comprise the following steps：
1）The magnetic valve of discharge tube is opened, after discharging 1 minute, gravimetric value C is read, passes through touch LCD screen
Input instruction；After running through, pulp-inlet pipe road magnetic valve is opened, starts to convey slurries from slurries absorption tower to measuring cylinder, simultaneously closes off
Backwash pipeline magnetic valve；
2）After entering slurries 20s, discharge tube magnetic valve is closed, collects slurries；
3）When slurries fill, close pulp-inlet pipe road magnetic valve, unnecessary slurries by overflow pipe with being back to absorption tower
Hole；
4）After static 2 minutes, after graduated cylinder to be measured is stable, reading weight signal A, pH value, conductivity values and OPR values, and
Computing is carried out in PLC logic unit and is shown on the touchscreen；
5）Present apparatus discharge tube magnetic valve is opened, after discharging 1 minute, inlet channel magnetic valve is opened, starts to measurement
Conveying clear water in cylinder；
6）Tank body is rinsed, is delayed after 20S, closes discharge tube magnetic valve, collects clear water, clear water fills, and closes water inlet pipe
Road magnetic valve；
7）After static 2 minutes, after graduated cylinder to be measured is stable, weight letter B is read, computing is carried out simultaneously in PLC logic unit
Shown on the touchscreen；
8）Calculating slurry density value, AO=（A – C） /（ B – C）, keep output to next detection cycle to refresh；Will
The AO calculated（Slurry density value）Show and be output to AO1, AO（Slurry density value）Refer to that S7-200PLC is counted in good time in this cabinet
Count evidence, and AO1 refers to first via analog output channel in this cabinet, and this AO1 output holdings finish new to next detection cycle
AO（Slurry density value）Refreshed after calculating；
9）System standby, be delayed 3min clock Posterior circles, starts next detection cycle.
The control voltage of each magnetic valve is 220V, and the feedback voltage of magnetic valve open and-shut mode is 24V.
Preferably, magnetic valve is divided into controls and automatically controls two kinds of mode of operations manually.Pass through touch LCD screen
It can realize and automatically and manually control, when " manual " pattern of selection, click on " valve opening " or " pass valve " button of any valve,
Action command can be handed down to S7-200PLC by touch LCD screen, and S7-200PLC can send " valve opening " or " pass valve " and refer to
Order, controls corresponding auxiliary reclay, valve is carried out " unlatchings " or " closing " and operates, when valve " unlatching " or " closing " in place
Afterwards, the limit switch on valve can act, while send " having turned on " or " being turned off " feedback command to S7-200PLC, and
The state of valve is shown on touch LCD screen, when " automatic " state of selection, S7-200PLC meeting bases are set
Program circuit is controlled to each valve, and records measurement data, and all surveys are shown and exported for touch LCD screen
Measure data.
Beneficial effects of the present invention are：Fixed volume slurries timing acquiring absorption tower in are relatively isolated in space at one,
Conversion is measured to serum density by volume-Weighing method, it is accurate to calculate quick and numerical value；Device can carry title simultaneously
The instruments such as weight instrument, pH instrument, conductance analysis, to slurries, other compositions detect；Pass through automatic on-line device the real time measure
Density, the original pressure transmitter in scene, and by formula P=ρ gh, pulp level h=P in absorption tower/ρ g are back-calculated to obtain, so as to
Pulp level in absorption tower can be controlled；The present apparatus installs PH, conductance, OPR above slurries measuring cylinder simultaneously（The oxygen of solution
Change reduction potential）Electrode can be taken out at any time, and it is rinsed, therefore desulfurization slurry is tied on its surface after avoiding operation long-time
The generation of phenomena such as dirty, the accuracy of system is ensured that, increase the life-span of electrode.
Brief description of the drawings
Fig. 1 is the overall structure diagram that supervising device is measured in the embodiment of the present invention；
Fig. 2 is Fig. 1 left view；
Fig. 3 is Fig. 1 top view.
Description of reference numerals
1- cabinets, 2- measuring cylinders, 3- overflow pipes, 4- measuring cylinders enter slurries and water inlet, 5- weighing sensors, 6- flushing waters
Pipeline, 7- pulp-inlet pipes road, 8- Backwash pipelines, 9- conductance analyzers, 10-OPR analyzers, 11,12-pH analyzers, 13- rows
Pipeline is put, 14- protective covers, A- measurement zones, B- control zones, M1- entering water electromagnetic valves, M2-, which enters, starches magnetic valve, M3- discharge solenoid valves,
M4- backwashing solenoid valves.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.It should be noted that below description in use word "front", "rear", "left", "right", " on " and
" under " direction in accompanying drawing is referred to, word " interior " and " outer " are referred respectively to towards or away from the side of particular elements geometric center
To.
Referring to Fig. 1-3, the present invention relates to a kind of slurries quality measurement supervising device, it is arranged at outside absorption tower, including cabinet
Body 1 and the measurement zone A and control zone B being arranged inside cabinet.Measurement zone A includes sampler and weighing device, sampler
For cylindrical measuring cylinder 2, weighing device is weighing sensor 5, and the lower end of measuring cylinder 2 sets pillar, and it is fixed on title by pillar
Retransmit on sensor 5
PLC control unit and connected instrument are set in the B of control zone, and instrument includes conductance analyzer 9, OPR
（The oxidation-reduction potential of solution）Analyzer 10 and two pH analyzers 11,12.Instrument includes exploring block and display unit, its
Exploring block is stretched into inside measuring cylinder 2 at the upper opening of measuring cylinder 2, and is not contacted with the inwall of measuring cylinder 2.
Inlet channel 6, pulp-inlet pipe road 7 and discharge tube 13 be set in cabinet 1, inlet channel 6 and pulp-inlet pipe road 7 collect to
Measuring cylinder enters slurries and water inlet 4, enters slurries by measuring cylinder and water inlet 4 is connected with measuring cylinder 2, discharge tube 13 also with survey
Graduated cylinder 2 is connected.Pulp-inlet pipe road 7 connects the sampling pipe on slurries absorption tower, and inlet channel 6 connects flushing water pipeline, discharge tube
13 connection absorption tower plasma discharge raceway grooves.Magnetic valve is set respectively on each pipeline, respectively including inlet channel magnetic valve M1, pulp-inlet pipe road
Magnetic valve M2 and discharge tube magnetic valve M3.
Weighing sensor and magnetic valve are connected with PLC control unit respectively.
Overflow pipe 3 is set in measuring cylinder 2, and liquid level is maintained at below the mouth of pipe of overflow pipe 3 in bucket.
As a preferred embodiment of the present invention, Backwash pipeline 8, the connection slurry of Backwash pipeline 8 are set on pulp-inlet pipe road 7
The sampling pipe and flushing water on liquid absorption tower, backwashing solenoid valve M4 is set in Backwash pipeline 8.The setting of Backwash pipeline 8
Function is when pulp-inlet pipe road 7 blocks, and can open Backwash pipeline and pulp-inlet pipe road 7 is backwashed.
Present invention simultaneously provides a kind of slurries quality measurement monitoring method based on above-mentioned slurries quality measurement supervising device,
Comprise the following steps：
1）The magnetic valve of discharge tube is opened, after discharging 1 minute, gravimetric value C is read, passes through touch LCD screen
Input instruction；After running through, pulp-inlet pipe road magnetic valve is opened, starts to convey slurries from slurries absorption tower to measuring cylinder, simultaneously closes off
Backwash pipeline magnetic valve；
2）After entering slurries 20s, discharge tube magnetic valve M3 is closed, collects slurries；
3）When slurries fill, closing pulp-inlet pipe road magnetic valve M2, unnecessary slurries are back to absorption tower by overflow pipe
Melt pit；
4）After static 2 minutes, after graduated cylinder to be measured is stable, reading weight signal A, pH value, conductivity values and OPR values, and
Computing is carried out in PLC logic unit and is shown on the touchscreen；
5）Open present apparatus discharge tube magnetic valve M3, discharge 1 minute after, open inlet channel magnetic valve M1, start to
Conveying clear water in measuring cylinder；
6）Tank body is rinsed, is delayed after 20S, closes discharge tube magnetic valve M3, collects clear water, clear water fills, and closes water inlet
Pipe electromagnetic valve M1；
7）After static 2 minutes, after graduated cylinder to be measured is stable, weight letter B is read, computing is carried out simultaneously in PLC logic unit
Shown on the touchscreen；
8）Calculating slurry density value, AO=（A – C） /（ B – C）, keep output to next detection cycle to refresh；
9）System standby, be delayed 3min clock Posterior circles, starts next detection cycle.
The control voltage of each magnetic valve is 220V, and the feedback voltage of magnetic valve open and-shut mode is 24V.
Magnetic valve is divided into controls and automatically controls two kinds of mode of operations manually.It can be realized by touch LCD screen
Automatically and manually control, when " manual " pattern of selection, click on " valve opening " or " pass valve " button of any valve, touch liquid
Action command can be handed down to S7-200PLC by crystal display screen, and S7-200PLC can send " valve opening " or " pass valve " instruction, control
Corresponding auxiliary reclay, valve is carried out " unlatchings " or " closing " and operate, when valve " unlatching " or " closing " in place after, valve
On limit switch can act, while send " having turned on " or " being turned off " feedback command to S7-200PLC, and touch
The state of liquid crystal display screen display valve, when " automatic " state of selection, S7-200PLC can be according to the program circuit set
Each valve is controlled, and records measurement data, all measurement data are shown and exported for touch LCD screen.
Above is the better embodiment of the present invention, but protection scope of the present invention not limited to this.It is any to be familiar with this area
Technical staff disclosed herein technical scope in, the conversion or replacement expected without creative work, should all cover
Within protection scope of the present invention.Therefore protection scope of the present invention should be defined by the protection domain that claim is limited.
Claims (3)
1. a kind of slurries quality measurement supervising device, including cabinet and the measurement zone being arranged inside cabinet and control zone, described
Measurement zone includes sampler and weighing device, sets PLC, the PLC to include logic unit and control in the control zone
Unit, described control unit connection instrument, the instrument include exploring block and display unit；The sampler is cylinder
Measuring cylinder, the exploring block of the instrument is stretched into inside measuring cylinder at measuring cylinder upper opening, and is not connect with measuring cylinder inwall
Touch；The weighing device is weighing sensor, and measuring cylinder lower end sets pillar, and it is fixed on weighing sensor by pillar；
Pulp-inlet pipe road, inlet channel and discharge tube, each pipeline is set to be connected respectively with measuring cylinder in the cabinet, pulp-inlet pipe road
Connect the sampling pipe on slurries absorption tower, inlet channel connection flushing water pipeline, discharge tube connection absorption tower plasma discharge raceway groove, institute
State and magnetic valve is set respectively on pipeline；The weighing sensor and magnetic valve are connected with PLC control unit respectively；The measurement
Supervising device is arranged at outside absorption tower, sets mobile protective cover above the cabinet, the protective cover be slab construction or
Triangular prism structure, it is characterised in that Backwash pipeline is set on the pulp-inlet pipe road, Backwash pipeline connection slurries absorption tower
Sampling pipe, sets backwashing solenoid valve in the Backwash pipeline, the instrument include pH analyzers, OPR analyzers and
Conductance analyzer, the control zone set touch LCD screen, are connected with PLC control unit.
2. a kind of slurries quality measurement monitoring method of the slurries quality measurement supervising device based on described in claim 1, it is special
Sign is, comprises the following steps：
1）The magnetic valve of discharge tube is opened, after discharging 1 minute, it is measuring cylinder weight to read gravimetric value C, C, passes through touch
Formula LCDs input instruction；After running through, pulp-inlet pipe road magnetic valve is opened, starts to convey slurry from slurries absorption tower to measuring cylinder
Liquid, simultaneously close off Backwash pipeline magnetic valve；
2）After entering slurries 20s, discharge tube magnetic valve is closed, collects slurries；
3）When slurries fill, closing pulp-inlet pipe road magnetic valve, unnecessary slurries pass through overflow pipe backflow absorption tower melt pit；
4）After static 2 minutes, after graduated cylinder to be measured is stable, weight signal A, pH value, the conduction of slurries with measuring cylinder now are read
Rate value and OPR values, and carry out computing in PLC logic unit and shown on the touchscreen；
5）Present apparatus discharge tube magnetic valve is opened, after discharging 1 minute, inlet channel magnetic valve is opened, starts to measuring cylinder
Interior conveying clear water；
6）Tank body is rinsed, is delayed after 20S, closes discharge tube magnetic valve, collects clear water, clear water fills, and closes inlet channel electricity
Magnet valve；
7）After static 2 minutes, after graduated cylinder to be measured is stable, clear water and the weight signal B of measuring cylinder now are read, in PLC
Logic unit in carry out computing and on the touchscreen on shown；
8）Calculating slurry density value AO=（ A – C） /（B – C）* 1000, and the AO calculated is shown and is output to
AO1, this AO1 output keep finishing after new AO is calculated to next detection cycle being refreshed；
9）System standby, be delayed 3min clock Posterior circles, starts next detection cycle.
3. slurries quality measurement monitoring method as claimed in claim 2, it is characterised in that the magnetic valve is divided into manual control
Make and automatically control two kinds of mode of operations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417588.0A CN104251900B (en) | 2014-08-22 | 2014-08-22 | A kind of slurries quality measurement supervising device and measuring and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417588.0A CN104251900B (en) | 2014-08-22 | 2014-08-22 | A kind of slurries quality measurement supervising device and measuring and monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104251900A CN104251900A (en) | 2014-12-31 |
| CN104251900B true CN104251900B (en) | 2018-01-12 |
Family
ID=52186989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410417588.0A Active CN104251900B (en) | 2014-08-22 | 2014-08-22 | A kind of slurries quality measurement supervising device and measuring and monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104251900B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467954B (en) * | 2015-11-20 | 2018-09-18 | 华北电力大学（保定） | A kind of method and device of desulfurization method of limestone-gypsum ORP and pH double controls |
| CN106823761A (en) * | 2016-12-07 | 2017-06-13 | 湖南华电常德发电有限公司 | A kind of desulfuration absorbing tower liquid level of slurry failure emergency processing method |
| CN111595376A (en) * | 2020-05-15 | 2020-08-28 | 中国矿业大学 | Intelligent digital detection system and method for roadway anchor rod and cable grouting parameters |
| CN113281217A (en) * | 2021-03-30 | 2021-08-20 | 华电电力科学研究院有限公司 | Continuous online automatic measurement device and method for slurry density |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201765167U (en) * | 2010-09-03 | 2011-03-16 | 杨玉娟 | Slurry densitometer |
| CN102384884A (en) * | 2010-09-03 | 2012-03-21 | 杨玉娟 | Sampling type size density measuring method |
| CN202793960U (en) * | 2012-07-30 | 2013-03-13 | 昆明理工大学 | Ore pulp density detection device |
| CN204044133U (en) * | 2014-08-22 | 2014-12-24 | 华能南京金陵发电有限公司 | A kind of slurries quality measurement supervising device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203778418U (en) * | 2014-04-19 | 2014-08-20 | 山西兰花科技创业股份有限公司 | Automatic pipeline backwashing device |
-
2014
- 2014-08-22 CN CN201410417588.0A patent/CN104251900B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201765167U (en) * | 2010-09-03 | 2011-03-16 | 杨玉娟 | Slurry densitometer |
| CN102384884A (en) * | 2010-09-03 | 2012-03-21 | 杨玉娟 | Sampling type size density measuring method |
| CN202793960U (en) * | 2012-07-30 | 2013-03-13 | 昆明理工大学 | Ore pulp density detection device |
| CN204044133U (en) * | 2014-08-22 | 2014-12-24 | 华能南京金陵发电有限公司 | A kind of slurries quality measurement supervising device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104251900A (en) | 2014-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104251900B (en) | A kind of slurries quality measurement supervising device and measuring and monitoring method | |
| CN101657701A (en) | valve leakby diagnostics | |
| CN206248652U (en) | Real-time in-situ water quality monitor | |
| CN104764874A (en) | Device and method for detecting air content in concrete mixture | |
| CN201254989Y (en) | On-line detection device for water content of oil well | |
| CN207051141U (en) | The multi-functional on-line analysis system of wet desulphurization slurry | |
| CN101368917B (en) | Automatic ore slurry grade control instrument | |
| CN110426477A (en) | The simulator of Zero-valent Iron hydrodynamic seepage pressure | |
| CN108444856B (en) | Rapid tester and testing method for gas content and pressure of underground coal seam of coal mine | |
| CN204044133U (en) | A kind of slurries quality measurement supervising device | |
| CN1225647C (en) | Apparatus for continuous and automatic measurement of radial flow sediment content | |
| CN204944978U (en) | Novel grouting automatic recorder proportion monitoring device | |
| CN103276713B (en) | Environmental piezocone penetration test (CPTU) probe capable of evaluating permeability characteristic of saturated soil in site | |
| CN201322729Y (en) | Automatically controlled mash grade analyzer | |
| CN204831954U (en) | Nonmetal pulp density detection device of environment -friendly | |
| CN107290396A (en) | Coal petrography adsorption-desorption integral resistance rate measurement apparatus | |
| CN108507648A (en) | Continuous weighing metering device | |
| CN107589101B (en) | Online oily sewage detection device based on ultraviolet fluorescence method | |
| CN106018172A (en) | Method and apparatus for online detecting water and oil content in petroleum | |
| CN202421014U (en) | Slurry density-measuring unit | |
| CN210514293U (en) | Automatic coal seam gas content measuring device | |
| CN201072407Y (en) | On-line detecting instrument for minute oil-hydrocarbon in water | |
| CN207366409U (en) | A kind of instrument for measuring permeability coefficient | |
| CN113107403A (en) | Drilling fluid overflow early warning monitoring system and early warning monitoring method | |
| CN206648826U (en) | Closet gravity type flushometer comprehensive test machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |