CN210953876U - Flux adding control system based on X-ray diffraction analysis - Google Patents
Flux adding control system based on X-ray diffraction analysis Download PDFInfo
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Abstract
The utility model discloses a fluxing agent adds control system based on X-ray diffraction analysis belongs to coal gasification control technical field. The device comprises a coal ash sampler, a coal ash sample injector, an X-ray diffractometer, an X-ray diffraction pattern spectrum analyzer, a server and a fluxing agent feeder; the coal ash sampler samples and then sends the samples into an X-ray diffractometer through a coal ash sampler sample preparation device to perform online detection to generate an X-ray diffraction pattern, an X-ray diffraction pattern analyzer is adopted to analyze the obtained X-ray diffraction pattern, a server generates a flux addition amount adjusting strategy in real time according to data obtained by analysis, a flux feeder determines the flux feeding amount according to the flux addition amount adjusting strategy transmitted by the server to perform addition, online real-time control of flux addition can be realized, normal slag hanging on a film water-cooled wall of the gasification furnace is realized, long-period safe and stable operation of the gasification furnace is ensured, the application range is wide, and the method is suitable for large-scale popularization.
Description
Technical Field
The utility model belongs to the technical field of coal gasification control, concretely relates to fluxing agent adds control system based on X-ray diffraction analysis.
Background
With the increasing shortage of domestic primary energy supply, the efficient utilization of the low-grade coal with high ash fusion temperature (ash melting point) more than 1500 ℃ is of great concern. The entrained flow bed gasification technology has strong adaptability to coal types, widens the utilization range of the coal types, and particularly can gasify the coal types with higher ash content. At present, the coal gasification technology develops towards high temperature and high pressure, the slag tapping gasification technology gradually takes the leading position to ensure that the gasification furnace can smoothly tap slag, and the operation temperature of the gasification furnace is higher than the flowing temperature of raw material coal in principle. Therefore, the carbon conversion rate cannot be reduced, normal slag adhering to the membrane water wall of the gasification furnace is smoothly realized, and the long-period safe and stable operation of the gasification furnace is ensured. The reserves of high ash point coal resources in China are large, wherein coal with an ash melting point of more than 1500 ℃ accounts for 50 percent of the total coal resources. In order to meet the requirement of the slagging-off gasification technology on ash melting point, a fluxing agent must be added to coal with high ash melting point temperature to effectively reduce the ash melting point.
The melting point of coal ash is an important index of coal for gasification, and guides the addition of a specific gasifier fluxing agent. The melting point of coal ash depends largely on the chemical composition of the coal ash and its content. Therefore, the amount of flux to be added needs to be determined by studying the chemical composition of the coal ash in detail. Alumina, silica are generally called as acid oxides, the content of which is higher, the melting point temperature of coal ash is higher, magnesia, calcium oxide and iron oxide are generally called as alkaline oxides, the content of which is higher, the melting point temperature of coal ash is lower, but in view of the complexity of chemical components of coal ash in the actual production process and certain fluctuation of the content of each chemical component, a rapid coal ash chemical component analysis method is needed for real-time online analysis, and the adding type and adding amount of the fluxing agent are determined according to the analysis method.
The existing method for analyzing elements such as Ca, Mg and the like in coal ash mainly adopts a titration analysis method, has complicated steps and long time consumption, and cannot realize on-line measurement. The kind and amount of flux added cannot be adjusted on-line according to actual conditions.
Disclosure of Invention
In order to solve the defects existing in the prior art, the utility model aims to provide a flux adding control system and method based on X-ray diffraction analysis, which can quickly and accurately detect the components of coal ash, thereby guiding the adding of the flux of the gasification furnace.
The utility model discloses a following technical scheme realizes:
the utility model discloses a fluxing agent addition control system based on X-ray diffraction analysis, which comprises a coal ash sampler, a coal ash sample injector, an X-ray diffractometer, an X-ray diffraction pattern spectrum analyzer, a server and a fluxing agent feeder;
the coal ash sampler is arranged at the outlet of the gasification furnace and is used for collecting coal ash and preparing the coal ash into a coal ash sample;
the coal ash sample injector is used for sending a coal ash sample to the X-ray diffractometer;
the X-ray diffractometer is connected with the X-ray diffraction pattern spectrum analyzer and is used for generating an X-ray diffraction pattern of the coal ash sample and sending the X-ray diffraction pattern to the X-ray diffraction pattern spectrum analyzer;
the coal ash sampler, the coal ash injector, the X-ray diffraction pattern analyzer and the fluxing agent feeder are respectively connected with the server.
Preferably, the coal ash sampler comprises a sample loading device and a flattening device, wherein the sample loading device is used for containing the collected coal ash, and the flattening device is used for flattening the coal ash in the sample loading device.
Preferably, the scanning speed of the X-ray diffractometer is 2 DEG/min, the scanning range is 10 DEG-60 DEG, and the scanning step is 0.02 deg.
Preferably, the soot injector is connected to a cooling system.
Preferably, the system further comprises a temperature measuring device for measuring the temperature of the coal ash sample.
Further preferably, the temperature measuring device is an infrared temperature detector.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a flux adds control system based on X-ray diffraction analysis, coal ash sampler is sent into X-ray diffractometer through coal ash injector system appearance after the sample and is carried out on-line measuring and generation X-ray diffraction map, and the precision is high, and is fast; the obtained X-ray diffraction pattern is analyzed by adopting an X-ray diffraction pattern analyzer, a server generates a flux addition amount adjusting strategy in real time according to data obtained by analysis, a flux feeder determines flux feeding amount according to the flux addition amount adjusting strategy transmitted by the server for adding, online real-time control of flux addition can be realized, normal slag hanging on a gasifier membrane water wall is realized, and long-period safe and stable operation of the gasifier is ensured. The method is applicable to various coals with the coal ash melting point within 1000-1500 ℃, is applicable to various entrained flow gasification technologies such as Shell, GSP, HT-L and GE, has wide application range and is suitable for large-scale popularization.
Furthermore, the coal ash discharged from the gasification furnace is collected through the sample loading device and the flattening device, and a coal ash sample with a flat surface is prepared, so that the data obtained by scanning of the X-ray diffractometer is more accurate.
Furthermore, the coal ash sample injector is connected with a cooling system, so that the coal ash sample can be rapidly cooled to the working temperature of the X-ray diffractometer, and the online detection efficiency of the system is improved.
Further, the system is provided with the temperature measuring device who is used for measuring coal ash sample temperature, can detect the real-time temperature of coal ash sample and send to the server, starts X-ray diffractometer when reaching X-ray diffractometer's operating temperature, and degree of automation is high, and the data that record are accurate.
Furthermore, the temperature measuring device adopts an infrared temperature measurer, can remotely measure the temperature of the surface of the coal ash sample, and has the advantages of quick response time, non-contact, safe use, long service life and the like.
Drawings
Fig. 1 is a schematic overall structure diagram of a flux addition control system based on X-ray diffraction analysis according to the present invention;
fig. 2 is a schematic view of the work flow of the flux addition control system based on X-ray diffraction analysis according to the present invention.
In the figure: 1-coal ash sampler, 2-coal ash injector, 3-X-ray diffractometer, 4-X-ray diffractometer analyzer, 5-server and 6-fluxing agent feeder.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:
fig. 1 is a fluxing agent addition control system based on X-ray diffraction analysis of the present invention, which includes a coal ash sampler 1, a coal ash sample injector 2, an X-ray diffractometer 3, an X-ray diffraction pattern spectrum analyzer 4, a server 5 and a fluxing agent feeder 6;
the coal ash sampler 1 is arranged at an outlet of the gasification furnace, the coal ash sampler 1 comprises a sample loading device and a flattening device, the sample loading device is used for containing collected coal ash, the sample loading device is a round container with a certain depth, and the flattening device is used for flattening the coal ash in the sample loading device to prepare a round cake-shaped coal ash sample.
The coal ash sample injector 2 is used for delivering the coal ash sample prepared by the coal ash sample injector 1 to the X-ray diffractometer 3, and the coal ash sample injector 2 can adopt a conveying device commonly used in an automatic system, such as a conveying belt, a conveying table, a mechanical arm and the like; the coal ash injector 2 is connected with a cooling system, and the cooling system is connected with the server 5. The system also comprises a temperature measuring device for measuring the temperature of the coal ash sample, the temperature measuring device is connected with the server 5, and an infrared temperature measurer is preferably selected as the temperature measuring device.
The X-ray diffractometer 3 is connected with the X-ray diffraction pattern spectrum analyzer 4, the X-ray diffractometer 3 is used for generating an X-ray diffraction pattern of the coal ash sample and sending the X-ray diffraction pattern to the X-ray diffraction pattern spectrum analyzer 4, and the parameters of the X-ray diffractometer 3 are preferably as follows: the scanning speed is 2 degrees/min, the scanning range is 10 degrees to 60 degrees, and the scanning step is 0.02 degrees;
the coal ash sampler 1, the coal ash injector 2, the X-ray diffractometer 3, the X-ray diffraction pattern analyzer 4 and the flux feeder 6 are respectively connected to a server 5.
As shown in fig. 2, the method for controlling the flux addition by using the flux addition control system based on the X-ray diffraction analysis comprises the following steps:
1) setting m1The initial amount of the flux is generally m1When the gasification reaction starts, the server 5 controls the coal ash sampler 1 to collect coal ash at the outlet of the gasification furnace and prepare the coal ash sample 1;
2) the server 5 controls the coal ash sample injector 2 to send the coal ash sample 1 to the X-ray diffractometer 3;
3) detecting the coal ash sample 1 by using an X-ray diffractometer 3, selecting 3-5 points on the surface of the coal ash sample, scanning each point for 3-5 times to obtain an X-ray diffraction pattern of the coal ash sample 1, and sending the X-ray diffraction pattern to an X-ray diffraction pattern spectrum analyzer 4;
4) an X-ray diffraction pattern analyzer 4 analyzes the X-ray diffraction pattern of the coal ash sample 1 to obtain the characteristic peaks of anorthite, forsterite and magnesia spinel in the X-ray diffraction pattern of the coal ash sample 1, and calculates the ratio a of the characteristic peak areas to the total peak area of the anorthite, forsterite and magnesia spinel1A is to1Sending to the server 5;
5) the server 5 adjusts the amount of flux added to the flux feeder 6 to m2，m2＝2m1The server 5 controls the coal ash sampler 1 to collect coal ash at the outlet of the gasification furnace and prepare a coal ash sample 2;
6) repeating the steps 2) to 4) to obtain the ratio a of the characteristic peak areas and the total peak area of anorthite, forsterite and magnesia spinel in the X-ray diffraction spectrum of the coal ash sample 22A is to2Sending to the server 5;
7) server 5 to a1And a2Making a comparison if a2≤1.05a1Maintaining the amount of the flux added m in the time period T2(ii) a If a2＞1.05a1Repeating the steps 5) and 6) until an≤1.05a1(n is 2,3,4 … …), the amount of flux added m is maintained during the time period Tn＝nm1(n＝2,3,4……)；
8) And repeating the steps 1) to 7) at intervals of a time period T, wherein T is usually 30-120 min.
A above1，a2……an(n-2, 3 … …) is calculated by the X-ray diffraction pattern analyzer 4 by a1＝an＝IAnorthite+IOlivine stone+ISpinel(n-2, 3 … …) wherein the peak area ratio IAnorthite＝SCalcium feldspar-SGeneral assembly，IOlivine stone＝SOlive stone/liver and/or kidney combinationSGeneral assembly，ISpinel＝SSpinel-SGeneral assemblyIn which S isAnorthiteThe characteristic peak area of anorthite at 2 theta of 26.9-27.9 DEG, SOlivine stoneThe characteristic peak area of the olivine at 2 theta of 36.3-35.3 DEG, SSpinelThe characteristic peak area of the spinel at 2 theta of 36.6-36.95 DEG is calculated to obtain the peak area ratio IAnorthite＝SCalcium feldspar-SGeneral assembly，IOlivine stone＝SOlive stone/liver and/or kidney combinationSGeneral assembly，ISpinel＝SSpinel-SGeneral assembly. Wherein S isGeneral assembly＝SAnorthite+SOlivine stone+SSpinel。
The invention is further explained below with reference to several exemplary embodiments:
example 1
Taking a certain 1500-ton/day shell gasification furnace as an example, the shell coal gasification technology is adopted, and the feeding amount of the coal powder is 60 tons/h.
1) Determining m1The coal is gasified with the coal amount of 1 percent, namely 600kg/h, and the method adoptsThe coal ash sampler 1 obtains a coal ash sample 1;
2) sending the coal ash sample 1 to an X-ray diffractometer 3 by using a coal ash sample injector 2;
3) performing X-ray diffraction test on a coal ash sample 1 to be detected by using an X-ray diffractometer 3, selecting 5 points, and scanning each point for 5 times to obtain an X-ray diffraction map of the coal ash sample 1;
4) reading the characteristic peaks of anorthite, forsterite and magnesia spinel in the X-ray diffraction pattern of the coal ash sample 1 obtained in the step 3) by adopting an X-ray diffraction pattern analyzer 4, and calculating the ratio a of the characteristic peak areas of the anorthite, the forsterite and the magnesia spinel to the total peak area1。a1，a2……an(n-2, 3 … …) is calculated by a1＝an＝IAnorthite+IOlivine stone+ISpinel(n-2, 3 … …) wherein the peak area ratio IAnorthite＝SAnorthite/SGeneral assembly，IOlivine stone＝SOlivine stone/SGeneral assembly，ISpinel＝SSpinel/SGeneral assemblyFirstly, baseline correction and peak separation treatment are carried out, and automatic integration is carried out to calculate the total peak area SGeneral assemblyAnd anorthite SAnorthiteOlivine SOlivine stoneAnd spinel SSpinelCharacteristic peak area S ofTotal ═ totalSAnorthite+SOlivine stone+SSpinelIn which S isAnorthiteThe characteristic peak area of anorthite at 2 theta of 26.9-27.9 DEG, SOlivine stoneThe characteristic peak area of the olivine at 2 theta of 36.3-35.3 DEG, SSpinelThe characteristic peak area of the spinel at 2 theta of 36.6-36.95 DEG is calculated to obtain the peak area ratio IAnorthite＝SCalcium feldspar-SGeneral assembly，IOlivine stone＝SOlive stone/liver and/or kidney combinationSGeneral assembly，ISpinel＝SSpinel-SGeneral assembly。SGeneral assembly＝SAnorthite+SOlivine stone+SSpinel。
5) The amount of the flux added was defined as m2＝2*m1Carrying out gasification reaction at 1200kg/h to obtain coal ash sample 2;
6) repeating the steps 2) to 4) to obtain the characteristic peaks of anorthite, forsterite and magnesia spinel in the coal ash sample 2X-ray diffraction spectrum, and calculating the ratio a of the characteristic peak areas of the anorthite, the forsterite and the magnesia spinel to the total peak area2，a2The calculation method is the same as a1；
7) A flux addition amount adjustment policy is generated by comparison using the server 5, a2＝1.15a1Then, the amount of the flux added is continuously increased to m3；
8) Repeating the steps 2) to 7) until the ratio a of the peak areas of anorthite, forsterite and magnesia spinel to the total peak area in the coal ash sample 5X-ray diffraction spectrum is obtained5＝1.01a4The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m5＝5*m1＝3000kg/h。
Repeating the steps after 30min until the ratio a of the peak areas of anorthite, forsterite and magnesia spinel to the total peak area in the 3X-ray diffraction spectrum of the coal ash sample is obtained3＝1.02a3The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m2＝3*m1＝1800kg/h。
Example 2
Taking a certain 1200 ton/day coal water slurry gasification furnace as an example, the coal water slurry gasification technology is adopted, and the coal powder feeding amount is 40 ton/h.
1) Determining m1The coal is gasified with the coal feeding amount of 0.75 percent, namely 300kg/h, and a coal ash sample 1 is obtained by adopting a coal ash sampler 1;
2) sending the coal ash sample 1 to an X-ray diffractometer 3 by using a coal ash sample injector 2;
3) performing X-ray diffraction test on a coal ash sample 1 to be detected by using an X-ray diffractometer 3, selecting 3 points, and scanning each point for 3 times to obtain an X-ray diffraction map of the coal ash sample 1;
4) reading the characteristic peaks of anorthite, forsterite and magnesia spinel in the X-ray diffraction pattern of the coal ash sample 1 obtained in the step 3) by adopting an X-ray diffraction pattern analyzer 4, and calculatingThe ratio a of the characteristic peak areas to the total peak area of anorthite, forsterite and magnesium spinel1，a1The calculation method is the same as that of example 1;
5) the amount of the flux added was defined as m2＝2*m1Carrying out gasification reaction at 600kg/h to obtain coal ash sample 2;
6) repeating the steps 2) to 4) to obtain the characteristic peaks of anorthite, forsterite and magnesia spinel in the coal ash sample 2X-ray diffraction spectrum, and calculating the ratio a of the characteristic peak areas of the anorthite, the forsterite and the magnesia spinel to the total peak area2，a2The calculation method is the same as a1；
7) Comparison is carried out using the server 5, a2＝1.01a1The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m2＝2*m1＝600kg/h。
Repeating the steps after 120min until the ratio a of the peak areas of anorthite, forsterite and magnesia spinel in the 4X-ray diffraction spectrum of the coal ash sample to the total peak area is obtained4＝1.01a3The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m4＝4*m1＝1200kg/h。
Example 3
Taking a moving bed gasification furnace of 1000 tons/day as an example, the BGL gasification technology is adopted, and the feeding amount of the pulverized coal is 400 tons/h.
1) Determining m1The coal is gasified with the coal feeding amount of 0.5 percent, namely 200kg/h, and a coal ash sample 1 is obtained by adopting a coal ash sampler 1;
2) sending the coal ash sample 1 to an X-ray diffractometer 3 by using a coal ash sample injector 2;
3) performing X-ray diffraction test on a coal ash sample 1 to be detected by using an X-ray diffractometer 3, selecting 4 points, and scanning each point for 4 times to obtain an X-ray diffraction map of the coal ash sample 1;
4) reading the characteristic peaks of anorthite, forsterite and magnesia spinel in the coal ash sample 1X-ray diffraction spectrum obtained in the step 3) by adopting an X-ray diffraction spectrum analyzer, and calculating the characteristic peak areas of anorthite, forsterite and magnesia spinelRatio a to total peak area1，a1The calculation method is the same as that of example 1;
5) the amount of the flux added was defined as m2＝2*m1Carrying out gasification reaction at 400kg/h to obtain coal ash sample 2;
6) repeating the steps 2) to 4) to obtain the characteristic peaks of anorthite, forsterite and magnesia spinel in the coal ash sample 2X-ray diffraction spectrum, and calculating the ratio a of the characteristic peak areas of the anorthite, the forsterite and the magnesia spinel to the total peak area2，a2The calculation method is the same as a1；
(7) A flux addition amount adjustment policy is generated by comparison using the server 5, a2＝1.21a1The amount of the flux added is continuously increased to m3；
(8) Repeating the steps (2) to (7) until the ratio a of the peak areas of anorthite, forsterite and magnesium spinel to the total peak area in the 6X-ray diffraction spectrum of the coal ash sample is obtained6＝1.01a5The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m6＝6*m1＝1200kg/h。
Repeating the steps after 60min until the ratio a of the peak areas of anorthite, forsterite and magnesia spinel to the total peak area in the coal ash sample 5X-ray diffraction spectrum is obtained5＝1.02a4The requirement of slag tapping gasification technology on the melting point of the coal ash is met, and the addition amount of the fluxing agent is kept to be m5＝5*m1＝1000kg/h。
It should be noted that the above description is only one of the embodiments of the present invention, and all equivalent changes made by the system described in the present invention are included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.
Claims (6)
1. A flux addition control system based on X-ray diffraction analysis is characterized by comprising a coal ash sampler (1), a coal ash injector (2), an X-ray diffractometer (3), an X-ray diffraction pattern spectrum analyzer (4), a server (5) and a flux feeder (6);
the coal ash sampler (1) is arranged at the outlet of the gasification furnace and is used for collecting coal ash and preparing the coal ash into a coal ash sample;
the coal ash sample injector (2) is used for sending the coal ash sample prepared by the coal ash sample injector (1) to the X-ray diffractometer (3);
the X-ray diffractometer (3) is connected with the X-ray diffraction pattern spectrum analyzer (4), and the X-ray diffractometer (3) is used for generating an X-ray diffraction pattern of the coal ash sample and sending the X-ray diffraction pattern to the X-ray diffraction pattern spectrum analyzer (4);
the coal ash sampler (1), the coal ash sample injector (2), the X-ray diffractometer (3), the X-ray diffractogram spectrum analyzer (4) and the fluxing agent feeder (6) are respectively connected with the server (5).
2. The flux addition control system based on X-ray diffraction analysis according to claim 1, wherein the coal ash sampler (1) comprises a sample loading device and a flattening device, wherein the sample loading device is used for containing collected coal ash, and the flattening device is used for flattening the coal ash in the sample loading device.
3. The flux addition control system based on X-ray diffraction analysis according to claim 1, characterized in that the scanning speed of the X-ray diffractometer (3) is 2 °/min, the scanning range is 10 ° to 60 °, and the scanning step is 0.02 °.
4. The system for controlling flux addition based on X-ray diffraction analysis according to claim 1, wherein the soot injector (2) is connected to a cooling system, and the cooling system is connected to the server (5).
5. The flux addition control system based on X-ray diffraction analysis according to claim 1, characterized in that the system further comprises a temperature measuring device for measuring the temperature of the soot sample, the temperature measuring device being connected to the server (5).
6. The flux addition control system according to claim 5, wherein the temperature measuring device is an infrared temperature measuring device.
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| WO2021083235A1 (en) * | 2019-10-29 | 2021-05-06 | 中国华能集团有限公司 | X-ray diffraction analysis-based fluxing agent addition control system and method |
| CN110632108B (en) * | 2019-10-29 | 2023-08-22 | 中国华能集团有限公司 | Flux addition control system and method based on X-ray diffraction analysis |
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