Arsenic curing rate measuring method based on combustion temperature and ash fusion point temperature and application
A technology of combustion temperature and measurement method, which is applied in the direction of fuel oil test, measurement device, chemical property prediction, etc., and can solve the problems of rapid detection method without coal arsenic volatilization characteristics, many experimental steps, and slow detection speed, etc.
Active Publication Date: 2021-05-18
WUHAN UNIV OF SCI & TECH
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Problems solved by technology
Although it is theoretically possible to set the spray parameters according to the solidification rate of arsenic in coal samples from the source, according to the current measurement method of solidification rate of arsenic in coal samples, there are the following problems: the whole measurement process involves many experimental steps, and the whole measurement process It takes 4 to 5 hours, and the detection speed is slow
Due to the complexity of trace levels of arsenic and differences in coal quality, there is currently no rapid detection method that can accurately predict the arsenic volatilization characteristics of coal species
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[0025]The present invention uses A2, Gz, SJS coal species data to describe the technical solution.
[0026]The first step: collect basic data for calculating coal species. Coal species Industrial Analysis As shown in Table 2, the ash component analysis of coal species and other coal species of coal species are listed in Table 2 and Table 3, respectively.
[0027]Table 1 Coal type industrial analysis
[0028]
[0029]Table 2 Analysis of Ash Composition of Coal
[0030]
[0031]Those skilled in the art have known that the data in Table 2 can calculate the gray melting point temperature S for different coal types.TIt will not be described in this note.
[0032]Table 3 Other Calculated Coal Basic Data
[0033]
[0034]The initial content of arsenic in Table 3 and the arsenic curing rate experimental value / % were detected by standard GB / T 3058-2008 (DETERMINATION OF ARSENIC IN CAOL).
[0035]Step 2: Calculate the dry-ray-free base coal species volatilityDAF , VDAF = VAD * 100 / (100-mAD -AAD Classification by clas...
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The invention discloses an arsenic curing rate measurement method based on combustion temperature and ash fusion point temperature, which comprises the following steps: collecting coal type basic data for calculation, including coal type name, initial content data of arsenic in a coal sample, component analysis data of coal ash, coal sample ash fusion point temperature and industrial analysis data of coal type. According to industrial analysis of the coal types, volatile component calculation of the coal types under the dry basis is completed, and the coal quality types are judged; according to the coal sample combustion temperature, the coal sample ash melting point temperature and coal ash component analysis, the volatilization amount of arsenic in the coal sample at the temperature is calculated; meanwhile, difference correction on different coal qualities is performed according to industrial analysis of coal types; and after coal quality difference correction, the curing rate of arsenic in the coal sample is calculated at the temperature. The invention further provides application of adjusting the spraying amount of the arsenic removal spraying liquid based on the arsenic curing rate measuring method. The method is small in data collection amount and convenient to calculate; when different coal types are predicted, the result can be more accurate and reasonable by using the method.
Description
Technical field[0001]The present invention relates to trace element detection techniques in coal, and more particularly to a arsenic curing rate measurement method based on combustion temperature and gray melting point temperature, the present invention also relates to flue gas dehydration techniques, and specifically, a arsenic curing rate measurement method is adjusted. Application of detachment spray liquid spray volume.Background technique[0002]The coal-fired boiler contains a large amount of fine particles, enriches more toxic trace elements, such as arsenic, and the serious environmental pollution caused by the arsenic has caused great concern at home and abroad. Arsenic will be in a gaseous form or enriched in submicron particles after volatilizing in combustion, and existing flue gas dust removal equipment such as electrostatic precipitator and bag dust collectors are difficult to capture. In theory, by lowering the temperature, the arsenic in the flue gas can cause the flow...
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IPC IPC(8): G16C20/10G16C20/30G01N25/22G01N33/22
CPCG16C20/10G16C20/30G01N25/22G01N33/222
Inventor 韩军熊自江赵波
Owner WUHAN UNIV OF SCI & TECH