CN205749351U - Transmission-type neutron activation online cement slurry sulfurbased NPK analyser - Google Patents
Transmission-type neutron activation online cement slurry sulfurbased NPK analyser Download PDFInfo
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- CN205749351U CN205749351U CN201620258952.8U CN201620258952U CN205749351U CN 205749351 U CN205749351 U CN 205749351U CN 201620258952 U CN201620258952 U CN 201620258952U CN 205749351 U CN205749351 U CN 205749351U
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Abstract
Transmission-type neutron activation online cement slurry sulfurbased NPK analyser: its measurement apparatus is that neutron source is placed between upper belt and lower belt, one gamma detector is fixed on the top of upper belt and cement slurry, neutron exposure is had an effect with the atomic nucleus in cement slurry after cement slurry on belt, the ray received is converted into pulse signal transmission and processes to Multi channel spectrum analysis device by gamma detector, effective information is uploaded to host computer by Multi channel spectrum analysis device, host computer calculate the sulfurbased NPK value of cement slurry according to respective formula.Because final calculated sulfurbased NPK value is SO3Content and K2O、Na2The ratio relation of O content sum, so not affected by the total amount of cement slurry on belt；The bulk shielding protection of instrument uses two-layer structure, and internal layer is lead, and outer layer is polyethylene, reduces the usage amount to lead, reduces cost and the weight of instrument；Detector shield uses two-layer structure, and outer layer is polyethylene, and internal layer is cadmium plate, is down to minimum by neutron on the impact of gamma detector, improves the analysis precision of instrument.
Description
Technical field
The present invention relates to a kind of online cement slurry sulfurbased NPK analytical tool, in particular relate to a kind of neutron activation and divide online
The instrument of the sulfurbased NPK in analysis cement slurry.
Background technology
New dry process in manufacture of cement produces in calcination system, and the sulfur that raw material are brought into can close with alkalization and form sulphuric acid alkali,
And be fixed in grog and expel from kiln with grog, if but sulfur content exceeded alkali can the quantity of chemical combination, will with in raw material
CaO formed CaSO4Or and C2S forms sulfur calcium silicates (2C2S·CaSO4) thus cause skinning.This external calcination process produces
The part that raw sulfurous gas is not absorbed by alkaline components can be discharged with flue gas, also to environment.Therefore, cement is controlled
Necessary issues that need special attention during sulfur and the content of alkaline components are cement production process in raw material.Typically come with sulfurbased NPK
Weigh the aequum of sulfur and alkali.
And determining the sulfurbased NPK value of cement slurry at present, the mode of employing is artificial sampling from belt, then by sample
By chemico-analytic method, obtain wherein SO3And K2O、Na2The content of O, then by calculating SO3Content and K2O、Na2O contains
The ratio of amount sum obtains the sulfurbased NPK value of cement slurry.
And by manual sampling to laboratory through chemical analysis methods and the sulfurbased NPK value that is calculated cement slurry,
Also dry in process, grind, the operation such as screening, the most final basicity value result out, be several hours later
, having there is serious hysteresis quality in time in thing, production technology can only play the effect of quality inspection afterwards, do not have guidance
The effect of technique adjustment.
There is presently no the instrument that can directly cement slurry on belt be carried out on-line analysis sulfurbased NPK value.
Summary of the invention
The defect existed for original technology, the present invention propose a kind of can the instrument of sulfurbased NPK of on-line analysis cement slurry
Device.
The concrete technical scheme that the present invention is taked is:
Shielding follower 5 is installed between the upper belt 2 of actual site of deployment and lower belt 1 by measurement bay 11, visits
Survey device shield 13 and be installed in upper belt 2 and the top of cement slurry of actual site of deployment by measurement bay 11.Measurement bay
11 are fixed by on-the-spot belt holder 10, are provided with protective cover 12 outside measurement bay 11.Detector shield 13 is internal equipped with γ
Ray detector 6, gamma ray detector 6 couples with Multi channel spectrum analysis device 8, and Multi channel spectrum analysis device 8 couples with host computer 9.
Protective cover 12 is divided into two layers, and the material of protective cover internal layer 122 is lead, and the material of protective cover outer layer 121 is polyethylene.
Detector shield 13 is divided into two layers, and the material of detector shield internal layer 132 is cadmium, detector shield outer layer
The material of 131 is polyethylene.
Equipped with neutron source 3 in shielding follower 5, shielding follower 5 carries out shielding protection to neutron source 3.Shielding follower 5
Having the dovetail straight hole 4 that can close, when collimating aperture is opened, neutron ray can only irradiate in certain scope, works as standard
After straight hole is closed, entirety is radiationless to leak.In use, dovetail straight hole 4 opens wide, the neutron that neutron source 3 is sent upwards according to
Penetrating, radiation is at upper belt 2 and cement slurry thereon, and neutron interacts with the atomic nucleus in cement slurry, atom
Core is by neutron activation, from stable ground state transition to unstable excited state, is activated atomic nucleus from exciting when different elements
The Characteristic γ ray of different-energy can be discharged during state de excitation.
The gamma-rays received is converted into pulse signal transmission to Multi channel spectrum analysis device 8, multiple tracks by gamma ray detector 6
The pulse amplitude that gamma ray detector 6 transmission is come by energy spectrum analysis device 8 is identified, and forms transverse axis correspondence radial energy respectively
Amount, the power spectrum of longitudinal axis correspondence ray number, and from power spectrum, identify corresponding element sulphur Characteristic γ ray energy peak and potassium element
Characteristic γ ray energy peak, peak area S1 and S2, the S3 of sodium element Characteristic γ ray energy peak, Multi channel spectrum analysis device 8 will be with
Upper data S1, S2, S3 are transferred to host computer 9, and host computer 9 calculates sulfurbased NPK value P of cement slurry according to following formula:
In formula, S1 is the peak area of element sulphur Characteristic γ ray energy peak, and S2 is the peak of potassium element Characteristic γ ray energy peak
Area, S3 is the peak area of sodium element Characteristic γ ray energy peak, and A, B, C, D, E, F are undetermined coefficient, by known sulfur alkali
The different cement slurries of ratio measure, the sulfurbased NPK value of measurement result S1, the numerical value of S2, S3 and correspondence use the non-of routine
Linear regression processing obtains.
Beneficial effect:
Because final calculated sulfurbased NPK value is the ratio relation of SO3 content and K2O, Na2O content sum, so
Do not affected by the total amount of cement slurry on belt.
Instrument bulk shielding protection use two-layer structure, internal layer be lead for shielding gamma-rays, outer layer be polyethylene use
Shield neutron.Lead is placed in internal layer, the usage amount to lead can be reduced, reduce cost and the weight of instrument.
Detector shield uses two-layer structure, and detector shield outer layer is that polyethylene is for absorbing slow neutron and slowing down
Fast neutron, makes through the neutron energy after polyethylene less than 0.5eV；Detector shield internal layer is cadmium plate, is less than energy
The neutron of 0.5eV has extremely strong absorption effect.By the two-layer structure of detector shield, by the neutron impact on gamma detector
It is down to minimum, improves the analysis precision of instrument.
Accompanying drawing explanation
Fig. 1 is the structural representation of instrument of the present invention
Fig. 2 is the section of structure of protective cover
Fig. 3 is the section of structure of detector shield
In figure: 1 time belt, 2 upper belt, 3 neutron sources, 4 dovetail straight holes, 5 shielding followers, 6 gamma detectors,
8 Multi channel spectrum analysis devices, 9 host computers, 10 belt holders, 11 measurement bays, 12 protective covers, 13 detector shields, 121
Protective cover outer layer, 122 protective cover internal layers, 131 detector shield outer layers, 132 detector shield internal layers.
Detailed description of the invention
It is described with reference to the accompanying drawings instrument structure and the using method of the present invention.
As shown in Figure 1:
Shielding follower 5 is installed between the upper belt 2 of actual site of deployment and lower belt 1 by measurement bay 11, visits
Survey device shield 13 and be installed in upper belt 2 and the top of cement slurry of actual site of deployment by measurement bay 11.Measurement bay
11 are fixed by on-the-spot belt holder 10, are provided with protective cover 12 outside measurement bay 11.Detector shield 13 is internal equipped with γ
Ray detector 6, gamma ray detector 6 couples with Multi channel spectrum analysis device 8, and Multi channel spectrum analysis device 8 couples with host computer 9.
Equipped with neutron source 3 in shielding follower 5, shielding follower 5 carries out shielding protection to neutron source 3.Shielding follower 5
Having the dovetail straight hole 4 that can close, when collimating aperture is opened, neutron ray can only irradiate in certain scope, works as standard
After straight hole is closed, entirety is radiationless to leak.In use, dovetail straight hole 4 opens wide, the neutron that neutron source 3 is sent upwards according to
Penetrating, radiation is at upper belt 2 and cement slurry thereon, and neutron interacts with the atomic nucleus in cement slurry, atom
Core is by neutron activation, from stable ground state transition to unstable excited state, is activated atomic nucleus from exciting when different elements
The Characteristic γ ray of different-energy can be discharged during state de excitation.
As shown in Figure 2: protective cover 12 is divided into two layers, the material of protective cover internal layer 122 is lead, the material of protective cover outer layer 121
Matter is polyethylene.
As shown in Figure 3: detector shield 13 is divided into two layers, the material of detector shield internal layer 132 is cadmium, detector
The material of shield outer layer 131 is polyethylene.
The using method of instrument is as follows:
The gamma-rays received is converted into pulse signal transmission to Multi channel spectrum analysis device 8, multiple tracks by gamma ray detector 6
The pulse amplitude that gamma ray detector 6 transmission is come by energy spectrum analysis device 8 is identified, and forms transverse axis correspondence radial energy respectively
Amount, the power spectrum of longitudinal axis correspondence ray number, and from power spectrum, identify corresponding element sulphur Characteristic γ ray energy peak and potassium element
Characteristic γ ray energy peak, peak area S1 and S2, the S3 of sodium element Characteristic γ ray energy peak.Formed power spectrum automatic peak-seeking,
Calculating peak area is the own function of Multi channel spectrum analysis device 8, and its technology is well known in industry.Multi channel spectrum analysis device 8 will
Data above S1, S2, S3 are transferred to host computer 9, and host computer 9 calculates sulfurbased NPK value P of cement slurry according to following formula:
In formula, S1 is the peak area of element sulphur Characteristic γ ray energy peak, and S2 is the peak of potassium element Characteristic γ ray energy peak
Area, S3 is the peak area of sodium element Characteristic γ ray energy peak, and A, B, C, D, E, F are undetermined coefficient, by known sulfur alkali
The different cement slurries of ratio measure, the sulfurbased NPK value of measurement result S1, the numerical value of S2, S3 and correspondence use the non-of routine
Linear regression processing obtains.
Application example:
The Cf-252 isotopic source that neutron source 3 selects activity to be 10 micrograms；
NaI (Tl) scintillator detector that gamma detector 6 selects crystalline size to be Ф 100 × 100mm；
The high-speed figure multiple tracks power spectrum that Dandong Dongfang Measurement & Control Technology Co., Ltd. develops selected by Multi channel spectrum analysis device 8
Analyzer；
Host computer 9 selects conventional industrial computer；
The material of protective cover internal layer 122 is lead, and thickness is 2 millimeters；
The material of protective cover outer layer 121 is polyethylene, and thickness is 10 centimetres；
The material of detector shield internal layer 132 is cadmium, and thickness is 0.5 millimeter；
The material of detector shield outer layer 131 is polyethylene, and thickness is 5 centimetres；
Measurement bay 11 entrusts machining factory to make；
Use instrument model machine that the cement slurry of 20 kinds of known sulfurbased NPK values is measured, obtained by nonlinear regression
The numerical value of A, B, C, D, E is respectively as follows: A=4.2568, B=6.2428, C=4.9871, D=5.2159, E=7.2858, F=0.01092.
Claims (1)
1. transmission-type neutron activation online cement slurry sulfurbased NPK analyser, it is characterised in that:
Described transmission-type neutron activation online cement slurry sulfurbased NPK analyser includes: measurement bay is passed through in shielding follower (5)
(11) being installed between the upper belt (2) of actual site of deployment and lower belt (1), detector shield (13) passes through measurement bay
(11) upper belt (2) and the top of cement slurry of actual site of deployment it are installed in；Measurement bay (11) is by on-the-spot belt
Frame (10) is fixed, and measurement bay (11) outside is provided with protective cover (12)；Detector shield (13) is internal equipped with gamma-ray detection
Device (6), gamma ray detector (6) couples with Multi channel spectrum analysis device (8), and Multi channel spectrum analysis device (8) joins with host computer (9)
Connect；
Equipped with neutron source (3) in shielding follower (5), shielding follower (5) carries out shielding protection to neutron source (3)；Shield defeated
Going out device (5) and have the dovetail straight hole (4) that can close, when collimating aperture is opened, neutron ray can only be in certain scope
Irradiating, after collimating aperture is closed, entirety is radiationless to leak；
Protective cover (12) is divided into two layers, and the material of protective cover internal layer (122) is lead, and thickness is 2 millimeters；Protective cover outer layer (121)
Material be polyethylene, thickness is 10 centimetres；
Detector shield (13) is divided into two layers, and the material of detector shield internal layer (132) is cadmium, and thickness is 0.5 millimeter；Visit
The material surveying device shield outer layer (131) is polyethylene, and thickness is 5 centimetres.
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| CN201620258952.8U CN205749351U (en) | 2016-03-31 | 2016-03-31 | Transmission-type neutron activation online cement slurry sulfurbased NPK analyser |
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| CN201620258952.8U CN205749351U (en) | 2016-03-31 | 2016-03-31 | Transmission-type neutron activation online cement slurry sulfurbased NPK analyser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107062A (en) * | 2017-12-14 | 2018-06-01 | 东莞理工学院 | A kind of detection device of neutron radiation shield concrete |
| CN108535300A (en) * | 2018-05-11 | 2018-09-14 | 南京航空航天大学 | A kind of built-in neutron Atomic Absorption SpectrophotometerICP |
-
2016
- 2016-03-31 CN CN201620258952.8U patent/CN205749351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107062A (en) * | 2017-12-14 | 2018-06-01 | 东莞理工学院 | A kind of detection device of neutron radiation shield concrete |
| CN108535300A (en) * | 2018-05-11 | 2018-09-14 | 南京航空航天大学 | A kind of built-in neutron Atomic Absorption SpectrophotometerICP |
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