CN205879832U

CN205879832U - Online neutron activation rate of sulfur and alkali analytical equipment of transmission -type cement raw

Info

Publication number: CN205879832U
Application number: CN201620258960.2U
Authority: CN
Inventors: 张伟; 杨振龙
Original assignee: Dandong Dongfang Measurement and Control Technology Co Ltd
Current assignee: Dandong Dongfang Measurement and Control Technology Co Ltd
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2017-01-11
Anticipated expiration: 2026-03-31

Abstract

Online neutron activation rate of sulfur and alkali analytical equipment of transmission -type cement raw: its measuring device is that a gamma detector is fixed in the belt and down between the belt, and belt and cement raw's top is placed in to neutron source, the neutron shine downwards on the belt behind the cement raw with cement raw in the atomic nucleus have an effect, the gamma detector turns into pulse signal with the received ray and transmits for the processing of multichannel power spectrum analysis ware, the host computer is passed to on with the effective information to multichannel power spectrum analysis ware, by the rate of sulfur and alkali value of host computer according to corresponding formula computing play cement raw. Because the rate of sulfur and alkali value that obtains of final computation is a SO3 content and the ratio of K2O, na2O content sum concerns, so do not receive the influence of cement raw's total amount on the belt, two layer structures are adopted in the bulk shielding protection of instrument, and the inlayer is plumbous, and the skin is the polyethylene, reduces the use amount to lead, reduces the cost and the weight of instrument, detector shield body adopts two layer structures, and the skin is the polyethylene, and the inlayer is cadmium plate, drops the neutron to the influence of gamma detector minimumly, improves the analysis precision of instrument.

Description

Transmission-type cement slurry online neutron activation sulfurbased NPK analytical equipment

Technical field

The present invention relates to a kind of online neutron activation analysis device, in particular relate to a kind of transmission-type cement slurry online in Son activation sulfurbased NPK analytical equipment.

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 proposes a kind of transmission-type cement slurry online neutron activation sulfurbased NPK Analytical equipment.

The concrete technical scheme that the present invention is taked is:

Detector shield 13 is installed between the upper belt 2 of actual site of deployment and lower belt 1 by measurement bay 11, Shielding follower 5 passes through measurement bay 11 and is installed in upper belt 2 and the top of cement slurry of actual site of deployment.Measurement bay 11 Fixed by on-the-spot belt holder 10, protective cover 12 is installed outside measurement bay 11.Detector shield 13 is internal to be penetrated equipped with γ Line 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, and the neutron that neutron source 3 is sent shines downwards Penetrating, be radiated upper belt 2 and carry cement slurry thereon, 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 SO₃Content and K₂O、Na₂The ratio relation of O content sum, so 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 device 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 assembly of the invention structure and using method.

As shown in Figure 1:

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 reflective cement slurry online neutron activation sulfurbased NPK analytical equipment 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:

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=4.6725, B=8.5562, C=2.7314, D=10.1569, E=1.0547, F=0.1027.

Claims

1. transmission-type cement slurry online neutron activation sulfurbased NPK analytical equipment, is characterized by:

Described transmission-type cement slurry online neutron activation sulfurbased NPK analytical equipment includes: detector shield (13) is by surveying Amount frame (11) is installed between the upper belt (2) of actual site of deployment and lower belt (1), and shielding follower (5) is by measuring Frame (11) is installed in upper belt (2) and the top of cement slurry of actual site of deployment；Measurement bay (11) is by on-the-spot skin Tape holder (10) is fixed, and measurement bay (11) outside is provided with protective cover (12)；Detector shield (13) is internal to be visited equipped with gamma-rays Surveying 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.