CN107797965A - A kind of update method and system of pulverizer outlet temperature secure setting - Google Patents

A kind of update method and system of pulverizer outlet temperature secure setting Download PDF

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Publication number
CN107797965A
CN107797965A CN201710994868.1A CN201710994868A CN107797965A CN 107797965 A CN107797965 A CN 107797965A CN 201710994868 A CN201710994868 A CN 201710994868A CN 107797965 A CN107797965 A CN 107797965A
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temperature
precipitation
coal
influence factor
concentration
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邢景伟
白德龙
张劲松
解冠宇
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INNER MONGOLIA DAIHAI ELECTRIC POWER GENERATION Co Ltd
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INNER MONGOLIA DAIHAI ELECTRIC POWER GENERATION Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/14Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/02Agriculture; Fishing; Mining

Abstract

The invention discloses a kind of update method and system of pulverizer outlet temperature secure setting.Methods described is specifically, determine the influence factor of coal pulverizer outlet CO concentration;According to the influence factor, drawn using method associated with thermogravimetric Fourier transform infrared spectroscopy on the graph of a relation between CO precipitation rates and influence factor;According to the graph of a relation between CO precipitation rates and influence factor, and field test measurement data is combined, update the secure setting of pulverizer outlet temperature, improve the outlet temperature of coal pulverizer.

Description

A kind of update method and system of pulverizer outlet temperature secure setting
Technical field
The present invention relates to coal pulverizer apparatus field, more particularly to a kind of renewal side of pulverizer outlet temperature secure setting Method and system.
Background technology
At present,《Power station coal pulverizer and pulverized coal preparation system type selecting directive/guide》(DL/T466-2004) with《Thermal power plant coal and system Powder system Explosion-proof Design technical regulation》(DL/T5203-2005) giving coal pulverizer outlet medium allows maximum temperature and combustion The relation of coal volatile matter content, and maximum temperature will be allowed to control in reduced levels.According to the difference of ature of coal, generally according to following Principle carries out outlet temperature control:High heating value bituminous coal is less than 82 DEG C, and low heat value bituminous coal is less than 77 DEG C, and ub-bituminous coal and lignite are less than 66 ℃。
Many scholars are studied medium-speed pulverizer heat transfer characteristic and coal dust Precipitation Characteristics, especially recently as relevant Research is carried out in a deep going way, and portion of techniques data shows, during the weight loss on heating of coal dust, what is separated out first in fuel gas is CO, and Precipitation Temperature is higher than weightless initial temperature, how to improve pulverizer outlet temperature, improves the economy of unit, into For a technical problem urgently to be resolved hurrily.
The content of the invention
The invention aims to improve pulverizer outlet temperature, the economy of unit is improved, there is provided a kind of coal pulverizer goes out The update method and system of mouth temperature safety setting value.
To achieve the above object, the invention provides following scheme:
A kind of update method of pulverizer outlet temperature secure setting, the pulverizer outlet temperature secure setting Update method comprises the following steps:
Determine the influence factor of coal pulverizer outlet CO concentration;
According to the influence factor, drawn using method associated with thermogravimetric-Fourier transform infrared spectroscopy and separated out on CO Graph of a relation between speed and influence factor;
According to the graph of a relation between CO precipitation rates and influence factor, and field test measurement data is combined, Update the secure setting of pulverizer outlet temperature.
Optionally, the influence factor of coal pulverizer outlet CO concentration is determined, is specifically included:
Establish the relational expression of coal pulverizer outlet CO concentration;
Establish the relational expression of the CO precipitation rates of the coal of unit mass;
The relation of the CO precipitation rates of the relational expression of CO concentration and the coal of the unit mass is exported according to the coal pulverizer Formula, determines the influence factor of coal pulverizer outlet CO concentration, and the influence factor of coal pulverizer outlet CO concentration includes coal pulverizer Air temperature of entrance, outlet at least one of air temperature and coal-air ratio.
Optionally, according to the influence factor, using method associated with thermogravimetric-Fourier transform infrared spectroscopy draw on Graph of a relation between CO precipitation rates and influence factor, is specifically included:
The coal dust sample of setting quality is obtained, simulated air environment, the temperature according to setting is started using thermogravimetric analyzer Scope and heating rate are heated up, while are tired out using the CO precipitation rates at each temperature of infrared spectrometric analyzer collection and CO Product amount of precipitation;
Amount of precipitation is accumulated as ordinate using temperature value as abscissa, CO precipitation rates and CO, show that temperature is analysed with CO Go out speed and accumulate the graph of a relation of amount of precipitation, and obtain temperature corresponding to the peak value of CO precipitation rates and separate out temperature as the first of CO Degree;
Using temperature value as abscissa, using the first differential of CO precipitation rates and CO precipitation rates as ordinate, obtain Temperature and the graph of a relation of the first differential of CO precipitation rates, and obtain temperature corresponding to the peak value of the first differential of CO precipitation rates The second Precipitation Temperature as CO.
Optionally, it is described on the graph of a relation between CO precipitation rates and influence factor in basis, and combine field test Measurement data, before the secure setting for updating pulverizer outlet temperature, in addition to, by the way of the field test described in amendment On the graph of a relation between CO precipitation rates and influence factor.
Optionally, by the way of the field test described in amendment on the relation between CO precipitation rates and influence factor Figure, is specifically included:
Different coal-supplying amount operating modes is selected, it is under every kind of coal-supplying amount operating mode, pulverizer outlet temperature is stable less than original The different temperature of secure setting, at each temperature, surveyed respectively using CO in-line analyzers and Portable smoke analysis instrument Measure CO and separate out concentration, obtain the measured value that CO separates out concentration;
According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two The graph of a relation between CO precipitation rates and influence factor is modified.
Optionally, by the way of the field test described in amendment on the relation between CO precipitation rates and influence factor Figure, is specifically included:
Different coal-supplying amount operating modes is selected, under every kind of coal-supplying amount operating mode, coal pulverizer inlet is stablized in different temperature, And at each temperature, measure CO precipitation concentration respectively using CO in-line analyzers and Portable smoke analysis instrument, obtain CO Separate out the measured value of concentration;
According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two The graph of a relation between CO precipitation rates and influence factor is modified.
Optionally, according to the graph of a relation between CO precipitation rates and influence factor, and combine field test and survey Data are measured, the secure setting of pulverizer outlet temperature is updated, specifically includes:
Step 1, the desired temperature of increase coal pulverizer outlet, obtain and assume temperature value;
Step 2, calculate the hypothesis temperature value on the graph of a relation between CO precipitation rates and influence factor according to Under CO concentration theoretical value, and determine the theoretical value whether in safe range;If the theoretical value in safe range, Step 3 is then performed, if the theoretical value not in safe range, performs step 5;
Step 3, the numerical value of pulverizer outlet temperature is arranged to the hypothesis outlet temperature, and using online CO measurement dresses Measurement CO concentration is put, obtains the first measured value;CO concentration is measured using Portable smoke analysis instrument, obtains the second measured value;Sentence First measured value and the second measured value break whether in safe range, if first measured value and second measurement Value then performs step 4, if having one not exist in first measured value and second measured value in the safe range In the safe range, then step 5 is performed;
Step 4, using the hypothesis temperature as desired temperature, continue to hold step 1;
Step 5, outlet temperature secure setting is updated to the desired temperature.
A kind of more new system of pulverizer outlet temperature secure setting, it is characterised in that the raising coal pulverizer outlet The system of temperature safety setting value includes:
Influence factor determining module, for determining the influence factor of coal pulverizer outlet CO concentration;
On the graph of a relation determining module between CO precipitation rates and influence factor, for according to the influence factor, adopting The method associated with thermogravimetric-Fourier transform infrared spectroscopy is drawn on the graph of a relation between CO precipitation rates and influence factor;
Outlet temperature secure setting update module, it is described between CO precipitation rates and influence factor for basis Graph of a relation, and field test measurement data is combined, update the secure setting of pulverizer outlet temperature.
Optionally, the influence factor determining module, is specifically included:
Coal pulverizer exports the relation reality submodule of CO concentration, for establishing the relational expression of coal pulverizer outlet CO concentration;
The relation reality submodule of the CO precipitation rates of the coal of unit mass, the CO analysis of the coal for establishing unit mass Go out the relational expression of speed;
Influence factor determination sub-module, for exporting the relational expression of CO concentration and the unit mass according to the coal pulverizer Coal CO precipitation rates relational expression, determine the influence factor of coal pulverizer outlet CO concentration, the coal pulverizer exports CO concentration Influence factor including coal pulverizer air temperature of entrance, outlet at least one of air temperature and coal-air ratio.
Optionally, the graph of a relation determining module between CO precipitation rates and influence factor, is specifically included:
DATA REASONING submodule, for obtaining the coal dust sample of setting quality, simulated air environment, using thermogravimetric analyzer Start to be heated up according to the temperature range and heating rate of setting, while gathered using infrared spectrometric analyzer at each temperature CO precipitation rates and CO accumulation amount of precipitation;
On the graph of a relation determination sub-module between CO precipitation rates and influence factor, for using temperature value as horizontal seat Mark, CO precipitation rates and CO accumulation amount of precipitations draw temperature and CO precipitation rates and the relation of accumulation amount of precipitation as ordinate Figure, and obtain first Precipitation Temperature of the temperature corresponding to the peak value of CO precipitation rates as CO;, will using temperature value as abscissa The first differential of CO precipitation rates and CO precipitation rates obtains temperature and the pass of the first differential of CO precipitation rates as ordinate System's figure, and obtain second Precipitation Temperature of the temperature corresponding to the peak value of the first differential of CO precipitation rates as CO.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
The invention discloses a kind of update method and system of pulverizer outlet temperature secure setting, with thermogravimetric-Fu Leaf transformation infrared spectrum combination (TG-FTR) method measure combines on the graph of a relation between CO precipitation rates and influence factor Theory analysis and field test, judge the safe range of pulverizer outlet temperature, improve the outlet temperature of coal pulverizer.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, accompanying drawing required in embodiment will be briefly described below. It is clear that drawings discussed below is only one embodiment of the present of invention, for those of ordinary skill in the art, On the premise of not paying creative work, other accompanying drawings can also be obtained according to this accompanying drawing.
Fig. 1 is a kind of flow chart of the update method of pulverizer outlet temperature secure setting provided by the invention;
Fig. 2 is the CO precipitation rates provided by the invention obtained under 5 DEG C/min heating rates and accumulation amount of precipitation with temperature The graph of a relation of the change of degree;
Fig. 3 is CO precipitation rates provided by the invention and CO precipitation rates to the first differential of temperature and the relation of temperature Figure;
Fig. 4 be A coal pulverizers provided by the invention when coal-supplying amount is 50t/h, coal pulverizer outlet CO concentration go out with coal pulverizer The relation curve of mouth temperature;
Fig. 5 is that A pulverizer outlet temperatures provided by the invention are stable at 75 DEG C, and the relation for exporting CO concentration and coal-supplying amount is bent Line;
Fig. 6 is that A pulverizer outlet temperatures provided by the invention are stable at 95 DEG C, and the relation for exporting CO concentration and coal-supplying amount is bent Line;
Fig. 7 be B coal pulverizers provided by the invention when coal-supplying amount is 50t/h, coal pulverizer outlet CO concentration enter with coal pulverizer The relation curve of mouth temperature;
Fig. 8 is that B provided by the invention mills and C are ground when inlet temperature is essentially identical, coal pulverizer outlet CO concentration and wind coal The relation curve of ratio;
Fig. 9 is a kind of structured flowchart of the more new system of pulverizer outlet temperature secure setting provided by the invention.
Embodiment
It is an object of the present invention to provide a kind of update method and system of pulverizer outlet temperature secure setting, to improve mill Coal machine outlet temperature, improve the economy of unit.
To enable above-mentioned purpose of the present invention, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and specific implementation Mode is described in further detail to this technology invention.
As shown in figure 1, the invention provides a kind of update method of pulverizer outlet temperature secure setting, the coal-grinding The update method of machine outlet temperature secure setting comprises the following steps:
Step 101, the influence factor of coal pulverizer outlet CO concentration is determined;
Step 102, according to the influence factor, pass is drawn using method associated with thermogravimetric-Fourier transform infrared spectroscopy Graph of a relation between CO precipitation rates and influence factor;
Step 103, according to the graph of a relation between CO precipitation rates and influence factor, and combine field test and survey Data are measured, update the secure setting of pulverizer outlet temperature.
Optionally, the influence factor of coal pulverizer outlet CO concentration is determined described in step 101, is specifically included:
Establish the relational expression of coal pulverizer outlet CO concentration;
Establish the relational expression of the CO precipitation rates of the coal of unit mass;
The relation of the CO precipitation rates of the relational expression of CO concentration and the coal of the unit mass is exported according to the coal pulverizer Formula, determines the influence factor of coal pulverizer outlet CO concentration, and the influence factor of coal pulverizer outlet CO concentration includes coal pulverizer Air temperature of entrance, outlet at least one of air temperature and coal-air ratio.
Specifically, determine concretely comprising the following steps for the influence factor of coal pulverizer outlet CO concentration:
According to the calculation formula of CO concentration, the derivation of equation is carried out, establishes the relational expression of coal pulverizer outlet CO concentration:
Wherein, c (CO) is the concentration that coal pulverizer exports CO, and M (CO) is CO in the precipitation volume of unit interval, ml/h; MairFor the volume of air flow of unit time, m3/h;V (CO) be unit quality coal CO precipitation rates, ml/g-min;Qc For the real quality flow of mill drying recycle stock, t/h;N is circulating ratio, takes 8;TpIt is that dry particle is warm in balance The mean residence time of degree, takes 1.1s;QairFor the air quality of unit time;ρairFor atmospheric density, kg/m3;Y is wind coal Than.
It is the single function of an equilibrium temperature, mean temperature and wind powder equilibrium temperature, coal-grinding according to CO precipitation rates v (CO) Air temperature of machine entrance, coal pulverizer outlet First air temperature line relationship, establish the CO precipitation rates of the coal of unit mass Relational expression:
V (CO)=f (Ts)=f (Tair0,T0,Y) (2)
Wherein, f (Ts) it is function, T corresponding to CO precipitation rate curvessFor wind powder equilibrium temperature, DEG C;Tair0Coal pulverizer Air temperature of entrance, DEG C;T0Coal pulverizer is taken to export an air temperature, DEG C;
Obtained according to formula (1) and (2), CO precipitation concentration influence factor includes:Air temperature of entrance of coal pulverizer, go out Mouth at least one of air temperature and coal-air ratio.
Optionally, according to the influence factor described in step 102, using associated with thermogravimetric-Fourier transform infrared spectroscopy Method is drawn on the graph of a relation between CO precipitation rates and influence factor, is specifically included:
The coal dust sample of setting quality is obtained, simulated air environment, the temperature according to setting is started using thermogravimetric analyzer Scope and heating rate are heated up, while are tired out using the CO precipitation rates at each temperature of infrared spectrometric analyzer collection and CO Product amount of precipitation;
Amount of precipitation is accumulated as ordinate using temperature value as abscissa, CO precipitation rates and CO, show that temperature is analysed with CO Go out speed and accumulate the graph of a relation of amount of precipitation, and obtain temperature corresponding to the peak value of CO precipitation rates and separate out temperature as the first of CO Degree.
Using temperature value as abscissa, using the first differential of CO precipitation rates and CO precipitation rates as ordinate, obtain Temperature and the graph of a relation of the first differential of CO precipitation rates, and obtain temperature corresponding to the peak value of the first differential of CO precipitation rates The second Precipitation Temperature as CO.
Specifically, the present invention takes thermogravimetric-Fourier transform infrared spectroscopy combination (TG-FTR) method, draw coal dust in sky Under compression ring border on the graph of a relation between CO precipitation rates and influence factor.Experiment is carried out under simulated air environment, is tested Preceding purging 1h, then claim sample, sample quality 15mg with crucible.According to the temperature range and heating rate of test requirements document, heat is set Remeasurement software, the initial temperature that sample is risen to setting keep constant temperature.Transmission line and gas cell are heated.Carry out infrared Software design patterns, and gather background.After constant temperature 20min, thermogravimetric analyzer starts to raise temperature by the temperature program(me) of setting, and starts Measurement and record data, while infrared spectrometer starts to gather infrared data.
Using measured temperature as abscissa, CO precipitation rates and CO accumulation amount of precipitations are used as ordinate, draw temperature and The relation of CO precipitation rates and accumulation amount of precipitation, obtains the peak value of CO precipitation rates;Using measured temperature as abscissa, CO analysis Go out speed and its first differential as ordinate, draw CO Precipitation Temperatures (the first Precipitation Temperature), flex point occurs in precipitation rate Precipitation rate is substantially accelerated (the second Precipitation Temperature) afterwards.
As shown in Fig. 2 the CO precipitation rates and accumulation amount of precipitation variation with temperature that are obtained under 5 DEG C/min heating rates Graph of a relation, CO adds up the ratio of amount of precipitation in figure, is that the integration of time is obtained with CO precipitation rates.CO precipitation rates Peak value is appeared near 450 DEG C, and before 450 DEG C, CO precipitation rates are all elevated with temperature rise, because temperature Higher, chemical reaction is more violent;And after 450 DEG C, CO precipitation rates are all to raise and reduce with temperature, because 450 DEG C when, CO accumulative amount of precipitation alreadys exceed 50%, and now chemical reactant is greatly reduced, that is, elevates the temperature, product CO Generating rate also progressively decay.
As shown in figure 3, CO precipitation rates and CO precipitation rates can be seen to the first differential of temperature and the graph of a relation of temperature Go out, micro CO precipitations before 150 DEG C be present and precipitation rate is extremely unstable, it is believed that now without precipitation.When temperature is up to 150 DEG C When, precipitation rate now is 0.01ml/g-min, and is also raised with the rise CO precipitation rates of temperature, but precipitation rate First derivative is but first raised and reduced afterwards, and at 340 DEG C, first derivative obtains minimum.After temperature is more than 340 DEG C, CO is separated out Speed, the first differential (to temperature) of CO precipitation rates raise gradually increase with temperature.
Optionally, in step 103 according to the graph of a relation between CO precipitation rates and influence factor, and combine existing Test measurement data, before the secure setting for updating pulverizer outlet temperature, in addition to, repaiied by the way of field test The just described graph of a relation between CO precipitation rates and influence factor.
Optionally, by the way of the field test described in amendment on the relation between CO precipitation rates and influence factor Figure, is specifically included:
Different coal-supplying amount operating modes is selected, it is under every kind of coal-supplying amount operating mode, pulverizer outlet temperature is stable less than original The different temperature of secure setting, at each temperature, surveyed respectively using CO on-line detectors and Portable smoke analysis instrument Measure CO and separate out concentration, obtain the measured value that CO separates out concentration;The former secure setting is coal pulverizer when coal pulverizer is run The secure setting of outlet temperature.
According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two The graph of a relation between CO precipitation rates and influence factor is modified.
Optionally, by the way of the field test described in amendment on the relation between CO precipitation rates and influence factor Figure, is specifically included:
Different coal-supplying amount operating modes is selected, under every kind of coal-supplying amount operating mode, coal pulverizer inlet is stablized in different temperature, And at each temperature, measure CO precipitation concentration respectively using CO in-line analyzers and Portable smoke analysis instrument, obtain CO Separate out the measured value of concentration;
According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two The graph of a relation between CO precipitation rates and influence factor is modified.
Optionally, according to the graph of a relation between CO precipitation rates and influence factor, and combine field test and survey Data are measured, the secure setting of pulverizer outlet temperature is updated, specifically includes:
Step 1, the desired temperature of increase coal pulverizer outlet, obtain and assume temperature value;
Step 2, calculate the hypothesis temperature value on the graph of a relation between CO precipitation rates and influence factor according to Under CO concentration theoretical value, and determine the theoretical value whether in safe range;If the theoretical value in safe range, Step 3 is then performed, if the theoretical value not in safe range, performs step 5;
Step 3, the numerical value of pulverizer outlet temperature is arranged to the hypothesis outlet temperature, and using online CO measurement dresses Measurement CO concentration is put, obtains the first measured value;CO concentration is measured using Portable smoke analysis instrument, obtains the second measured value;Sentence First measured value and the second measured value break whether in safe range, if first measured value and second measurement Value then performs step 4, if having one not exist in first measured value and second measured value in the safe range In the safe range, then step 5 is performed;
Step 4, using the hypothesis temperature as desired temperature, continue to hold step 1;
Step 5, outlet temperature secure setting is updated to the desired temperature.
As a specific real-time example, coal pulverizer coal-supplying amount is set as tri- typical conditions of 35t/h, 50t/h, 65t/h, Coal pulverizer exports the situation that CO is separated out before and after monitoring pulverizer outlet temperature rise respectively.Under each coal-supplying amount operating mode, it will grind Coal machine outlet temperature is stable in 75 DEG C, 85 DEG C, 95 DEG C of 3 operating modes.Control coal pulverizer inlet heating rate no more than 10 DEG C/ Min, and often rise 10 DEG C and stablize 5 minutes, observation CO separates out change in concentration.After each stable conditions 20min, coal pulverizer is gone out The wind powder mixed gas of mouth carries out CO Concentration Testings with CO on-line detectors and Portable smoke analysis instrument respectively.
Fig. 4 be A coal pulverizers when coal-supplying amount is 50t/h, coal pulverizer outlet CO concentration and pulverizer outlet temperature relation Curve.It can be seen that in the case of coal-supplying amount identical, with the raising of pulverizer outlet temperature, the CO concentration of coal pulverizer outlet is in finger Number increases (being straight line under logarithmic coordinates system).But coal pulverizer outlet CO maximum is divided into:19.1mg/m3, numerically very It is low.
Fig. 5 and Fig. 6 is that A pulverizer outlet temperatures are stable under 75 DEG C and 95 DEG C of two states, and outlet CO concentration is with giving coal The relation curve of amount, portable measured value and calculated value are very close.It can be seen that in disintegrating outlet temperature one regularly, with coal-supplying amount Increase, coal pulverizer outlet CO concentration be also exponentially increased, maximum 19.1mg/m3
Fig. 7 be B coal pulverizers when coal-supplying amount is 50t/h, the relation of coal pulverizer outlet CO concentration and coal pulverizer inlet temperature Curve.In the case of coal-supplying amount identical, with the raising of coal pulverizer inlet temperature, the CO concentration of coal pulverizer outlet exponentially increases Long (being straight line under logarithmic coordinates system).But the maximum of two coal pulverizers is respectively:19.3mg/m3、20.9mg/m3, numerically Still it is very low.
Fig. 8 is the two kinds of operating modes of B coal pulverizers and C coal pulverizers when inlet temperature is essentially identical, it can be seen that identical During inlet temperature, with the increase of coal-air ratio, coal pulverizer outlet CO concentration is consequently increased, but amount of increase is little.
By changing the parameters such as coal pulverizer inlet wind-warm syndrome, outlet temperature, a coal-air ratio, it was demonstrated that:By A coal pulverizers, B coal-grindings It is safe and feasible that machine, C pulverizer outlet temperatures, which are improved to 95 DEG C,.
After pulverizer outlet temperature integrally improves, boiler furnace negative pressure, furnace exit temperature etc. keep stable, First air Machine total current improves 5.1A, and pressure fan total current is unchanged, and air-introduced machine total current increase 1.9A, coal pulverizer total current reduces 11.2A, furnace side major pant item general power reduce about 38.8KW.Exhaust gas temperature is reduced to 115 DEG C from 124 DEG C, boiler efficiency Improve 0.45%.
As shown in figure 9, present invention also offers a kind of more new system of pulverizer outlet temperature secure setting, its feature It is, the system for improving pulverizer outlet temperature secure setting includes:
Influence factor determining module 901, for determining the influence factor of coal pulverizer outlet CO concentration;
On the graph of a relation determining module 902 between CO precipitation rates and influence factor, for according to the influence factor, Drawn using method associated with thermogravimetric-Fourier transform infrared spectroscopy on the relation between CO precipitation rates and influence factor Figure;
Outlet temperature secure setting update module 903, for according to it is described on CO precipitation rates and influence factor it Between graph of a relation, and combine field test measurement data, update the secure setting of pulverizer outlet temperature.
Optionally, the influence factor determining module 901, is specifically included:
Coal pulverizer exports the relation reality submodule of CO concentration, for establishing the relational expression of coal pulverizer outlet CO concentration;
The relation reality submodule of the CO precipitation rates of the coal of unit mass, the CO analysis of the coal for establishing unit mass Go out the relational expression of speed;
Influence factor determination sub-module, for exporting the relational expression of CO concentration and the unit mass according to the coal pulverizer Coal CO precipitation rates relational expression, determine the influence factor of coal pulverizer outlet CO concentration, the coal pulverizer exports CO concentration Influence factor including coal pulverizer air temperature of entrance, outlet at least one of air temperature and coal-air ratio.
Optionally, the graph of a relation determining module 902 between CO precipitation rates and influence factor, is specifically included:
DATA REASONING submodule, for obtaining the coal dust sample of setting quality, simulated air environment, using thermogravimetric analyzer Start to be heated up according to the temperature range and heating rate of setting, while gathered using infrared spectrometric analyzer at each temperature CO precipitation rates and CO accumulation amount of precipitation;
On the graph of a relation determination sub-module between CO precipitation rates and influence factor, for using temperature value as horizontal seat Mark, CO precipitation rates and CO accumulation amount of precipitations draw temperature and CO precipitation rates and the relation of accumulation amount of precipitation as ordinate Figure, and obtain first Precipitation Temperature of the temperature corresponding to the peak value of CO precipitation rates as CO;, will using temperature value as abscissa The first differential of CO precipitation rates and CO precipitation rates obtains temperature and the pass of the first differential of CO precipitation rates as ordinate System's figure, and obtain second Precipitation Temperature of the temperature corresponding to the peak value of the first differential of CO precipitation rates as CO.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
The invention discloses a kind of update method and system of pulverizer outlet temperature secure setting, first, it is determined that mill Coal machine exports the influence factor of CO concentration;Secondly, according to the influence factor, joined using thermogravimetric-Fourier transform infrared spectroscopy Method is drawn on the graph of a relation between CO precipitation rates and influence factor;Finally, according to described on CO precipitation rates Graph of a relation between influence factor, and field test measurement data is combined, the secure setting of pulverizer outlet temperature is updated, Under the conditions of coal pulverizer inlet temperature is less than limit value, the outlet temperature of coal pulverizer is further improved.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to technical principle, embodiment, and the explanation of above example is In order to help to understand the technology of the present invention method and core concept, the embodiment of description is only the individual example of the present invention, is not all of Embodiment.Based on the embodiment of the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made Every other embodiment, belongs to the scope of the present invention.

Claims (10)

  1. A kind of 1. update method of pulverizer outlet temperature secure setting, it is characterised in that the pulverizer outlet temperature peace The update method of full setting value comprises the following steps:
    Determine the influence factor of coal pulverizer outlet CO concentration;
    According to the influence factor, drawn using method associated with thermogravimetric-Fourier transform infrared spectroscopy on CO precipitation rates Graph of a relation between influence factor;
    According to the graph of a relation between CO precipitation rates and influence factor, and field test measurement data is combined, renewal The secure setting of pulverizer outlet temperature.
  2. 2. the update method of a kind of pulverizer outlet temperature secure setting according to claim 1, it is characterised in that really Determine the influence factor of coal pulverizer outlet CO concentration, specifically include:
    Establish the relational expression of coal pulverizer outlet CO concentration;
    Establish the relational expression of the CO precipitation rates of the coal of unit mass;
    The relational expression of the CO precipitation rates of the relational expression of CO concentration and the coal of the unit mass is exported according to the coal pulverizer, really Determine the influence factor of coal pulverizer outlet CO concentration, the influence factor of coal pulverizer outlet CO concentration includes the entrance one of coal pulverizer Secondary air temperature, outlet at least one of air temperature and coal-air ratio.
  3. A kind of 3. update method of pulverizer outlet temperature secure setting according to claim 1, it is characterised in that root According to the influence factor, drawn using method associated with thermogravimetric-Fourier transform infrared spectroscopy on CO precipitation rates with influenceing Graph of a relation between factor, is specifically included:
    The coal dust sample of setting quality is obtained, simulated air environment, the temperature range according to setting is started using thermogravimetric analyzer And heating rate is heated up, while using the CO precipitation rates at each temperature of infrared spectrometric analyzer collection and CO accumulation analysis Output;
    Amount of precipitation is accumulated as ordinate using temperature value as abscissa, CO precipitation rates and CO, show that temperature separates out speed with CO The graph of a relation of rate and accumulation amount of precipitation, and obtain first Precipitation Temperature of the temperature corresponding to the peak value of CO precipitation rates as CO;
    Using temperature value as abscissa, using the first differential of CO precipitation rates and CO precipitation rates as ordinate, temperature is obtained With the graph of a relation of the first differential of CO precipitation rates, and temperature conduct corresponding to the peak value of the first differential of CO precipitation rates is obtained CO the second Precipitation Temperature.
  4. A kind of 4. update method of pulverizer outlet temperature secure setting according to claim 1, it is characterised in that According to the graph of a relation between CO precipitation rates and influence factor, and field test measurement data is combined, update coal-grinding Before the secure setting of machine outlet temperature, in addition to, by the way of the field test described in amendment on CO precipitation rates with Graph of a relation between influence factor.
  5. 5. the method according to claim 4 for improving pulverizer outlet temperature safety value, it is characterised in that using scene examination On the graph of a relation between CO precipitation rates and influence factor described in the mode amendment tested, specifically include:
    Different coal-supplying amount operating modes is selected, it is under every kind of coal-supplying amount operating mode, pulverizer outlet temperature is stable less than former safety The different temperature of setting value, at each temperature, CO is measured using CO in-line analyzers and Portable smoke analysis instrument respectively Concentration is separated out, obtains the measured value that CO separates out concentration;
    According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
    The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two to institute State and be modified on the graph of a relation between CO precipitation rates and influence factor.
  6. 6. the update method of a kind of pulverizer outlet temperature secure setting according to claim 4, it is characterised in that adopt On the graph of a relation between CO precipitation rates and influence factor described in the mode amendment of field test, specifically include:
    Different coal-supplying amount operating modes is selected, it is under every kind of coal-supplying amount operating mode, coal pulverizer inlet is stable in different temperature, and At each temperature, CO precipitation concentration is measured respectively using CO in-line analyzers and Portable smoke analysis instrument, obtain CO and separate out The measured value of concentration;
    According to the graph of a relation between CO precipitation rates and influence factor, the theoretical value that CO separates out concentration is obtained;
    The measured value that the CO is separated out to the theoretical value and CO precipitation concentration of concentration is contrasted, and according to the difference of the two to institute State and be modified on the graph of a relation between CO precipitation rates and influence factor.
  7. A kind of 7. update method of pulverizer outlet temperature secure setting according to claim 1, it is characterised in that root According to the graph of a relation between CO precipitation rates and influence factor, and field test measurement data is combined, update coal pulverizer The secure setting of outlet temperature, is specifically included:
    Step 1, the desired temperature of increase coal pulverizer outlet, obtain and assume temperature value;
    Step 2, calculated according on the graph of a relation between CO precipitation rates and influence factor under the hypothesis temperature value The theoretical value of CO concentration, and determine the theoretical value whether in safe range;If the theoretical value is held in safe range Row step 3, if the theoretical value not in safe range, performs step 5;
    Step 3, the numerical value of pulverizer outlet temperature is arranged to the hypothesis outlet temperature, and using the measurement of CO in-line analyzers CO concentration, obtain the first measured value;CO concentration is measured using Portable smoke analysis instrument, obtains the second measured value;Described in judgement Whether the first measured value and the second measured value are in safe range, if first measured value and second measured value exist In the safe range, then step 4 is performed, if having one in first measured value and second measured value not in the peace In gamut, then step 5 is performed;
    Step 4, using the hypothesis temperature as desired temperature, continue to hold step 1;
    Step 5, outlet temperature secure setting is updated to the desired temperature.
  8. A kind of 8. more new system of pulverizer outlet temperature secure setting, it is characterised in that the raising coal pulverizer outlet temperature The system of degree secure setting includes:
    Influence factor determining module, for determining the influence factor of coal pulverizer outlet CO concentration;
    On the graph of a relation determining module between CO precipitation rates and influence factor, for according to the influence factor, using heat Method associated with weight-Fourier transform infrared spectroscopy is drawn on the graph of a relation between CO precipitation rates and influence factor;
    Outlet temperature secure setting update module, it is described on the relation between CO precipitation rates and influence factor for basis Figure, and field test measurement data is combined, update the secure setting of pulverizer outlet temperature.
  9. A kind of 9. more new system of pulverizer outlet temperature secure setting according to claim 8, it is characterised in that institute Influence factor determining module is stated, is specifically included:
    Coal pulverizer exports the relation reality submodule of CO concentration, for establishing the relational expression of coal pulverizer outlet CO concentration;
    The relation reality submodule of the CO precipitation rates of the coal of unit mass, for establishing the CO precipitation rates of unit mass coal Relational expression;
    Influence factor determination sub-module, for exporting the relational expression of CO concentration and the unit mass coal according to the coal pulverizer The relational expression of CO precipitation rates, determine the influence factor of coal pulverizer outlet CO concentration, the influence of coal pulverizer outlet CO concentration Factor includes air temperature of entrance of coal pulverizer, outlet at least one of air temperature and coal-air ratio.
  10. A kind of 10. more new system of pulverizer outlet temperature secure setting according to claim 8, it is characterised in that The graph of a relation determining module between CO precipitation rates and influence factor, specifically include:
    DATA REASONING submodule, for obtaining the coal dust sample of setting quality, simulated air environment, started using thermogravimetric analyzer Heated up according to the temperature range and heating rate of setting, while the CO at each temperature is gathered using infrared spectrometric analyzer Precipitation rate and CO accumulation amount of precipitations;
    On the graph of a relation determination sub-module between CO precipitation rates and influence factor, for using temperature value as abscissa, CO Precipitation rate and CO accumulation amount of precipitations are used as ordinate, draw temperature and CO precipitation rates and the graph of a relation of accumulation amount of precipitation, and Obtain first Precipitation Temperature of the temperature as CO corresponding to the peak value of CO precipitation rates;Using temperature value as abscissa, CO is analysed Go out the first differential of speed and CO precipitation rates as ordinate, obtain temperature and the relation of the first differential of CO precipitation rates Figure, and obtain second Precipitation Temperature of the temperature corresponding to the peak value of the first differential of CO precipitation rates as CO.
CN201710994868.1A 2017-10-23 2017-10-23 A kind of update method and system of pulverizer outlet temperature secure setting Pending CN107797965A (en)

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* Cited by examiner, † Cited by third party
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CN109374153A (en) * 2018-12-25 2019-02-22 湖南科技大学 A method of oxidation of coal temperature rise is calculated based on underground actual measurement gas concentration value
CN110906360A (en) * 2019-11-28 2020-03-24 安诺克斯(北京)环境科技有限公司 Working condition control system and method and main control unit

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CN109374153A (en) * 2018-12-25 2019-02-22 湖南科技大学 A method of oxidation of coal temperature rise is calculated based on underground actual measurement gas concentration value
CN110906360A (en) * 2019-11-28 2020-03-24 安诺克斯(北京)环境科技有限公司 Working condition control system and method and main control unit

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