CN104897743A - Analytic determination method for ammonia in denitration flue dust of flue gas of thermal power plant boiler - Google Patents
Analytic determination method for ammonia in denitration flue dust of flue gas of thermal power plant boiler Download PDFInfo
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Abstract
The invention provides an analytic determination method for ammonia in denitration flue dust of flue gas of a thermal power plant boiler. The method comprises the following steps: 1)direct dissolving a flue dust sample with water, wherein the water is one selected from the group consisting of deionized water, desalted water and distilled water and a mass volume ratio of the flue dust sample to the water is 5-20: 100 g/mL; 2) adding an ionic strength adjustor into a water sample prepared by dissolving the flue dust sample in the water and carrying out stirring for 5 to 60 min, wherein a volume ratio of the ionic strength adjustor to the water sample is 1: 90-120; and 3) subjecting the stirred water sample to filtering and measuring and analyzing the content of ammonia in the water sample by using an ammonia gas-sensitive electrode. The method provided by the invention selects a reasonable solvent, determines influence of different dissolving conditions on the dissolution rate of ammonia, verifies stability of the flue dust sample, provides an analytic approach for ammonia in flue dust and guides safe, economic and environment-friendly operation of a denitration system through regular determination of the escape amount denitration ammonia and data accumulation.
Description
Technical field
The invention belongs to field tests, be specifically related to ammonia content analysis determining method in a kind of flyash.
Background technology
NOx is one of major pollutants of atmospheric environment, and its main source is thermal power generation unit.Rely on low-NO_x combustion technology, far do not reach emission request.Selective-catalytic-reduction denitrified (be called for short SCR) technology is most effective, the most ripe, most widely used power-plant flue gas denitration technology at present.At present, there are problems in online the escaping of ammonia monitoring technology, have impact on accuracy and the stability of the escaping of ammonia Monitoring Data.When the conditions such as fuel type, chamber structure, heating surface layout, excessive air amount, burner hearth air flow method and denitrating catalyst type are determined, controlling ammonia addition and escape amount thereof well is the key point ensureing NOx removal efficiency.Coal-burning boiler dedusting flying dust ammonia content can the situation of side reflection denitration the escaping of ammonia rate.According to external bibliographical information, under normal circumstances, in electro-precipitating dust ammonia content generally within the scope of 50mg/kg-100mg/kg.Due to the domestic assay method that there is no ammonia content in ash, also run the data accumulation on the impact of flying dust ammon amount without denitration.Herein by lot of experiments, determine ammonia dissolution conditions in ash (as dissolution time, stirring, cement-water ratio, ash sample amount and stability thereof etc.), formulated ammonia content assay method in ash.
At present, online the escaping of ammonia monitoring technology many employings laser method both at home and abroad, is mainly divided in site measurement method and extracts analytic approach two kinds.Due in site measurement instrument transmitting, accept probe be directly installed on SCR device outlet walling of flue on, measuring sonde is subject to the vibration of steel walling of flue, temperature variation, and the impact of the factor such as high dust, make in-situ study method measurement result instability or produce instruction drift, causing amount of ammonia slip measured value confidence level to reduce.Extraction method, due to the impact of the validity of sample position, representativeness and sample lines material, heat-insulating property etc., makes to extract the accuracy that analytic approach measures Ammonia result and is under suspicion.By the actual investigation of Duo Jiayizhuan SCR power plant, and on-the-spot three producers, five kinds of exemplary apparatus repetition test of 2 years, improvement, proves that the escaping of ammonia table is inaccurate online at present both at home and abroad.
Summary of the invention
For the weak point existed in art technology, the object of the invention is to the analysis determining method proposing ammonia in a kind of power plant boiler denitrating flue gas flue dust.
To the measurement of ammonia content in thermal power plant's flyash, particularly to the measurement of ammonia content in denitration unit flyash, measure the content of the ammonia adsorbed in flyash, understanding denitration the escaping of ammonia situation for denitration power plant provides foundation.
The technical scheme realizing the object of the invention is:
An analysis determining method for ammonia in power plant boiler denitrating flue gas flue dust, comprises the following steps:
1) directly dissolve ash sample with water, described water is the one in deionized water, demineralized water, distilled water; The mass volume ratio of ash sample and water is 5-20:100g/mL;
2) the water-soluble water sample made of ash sample adds ionic strength adjustor, and the volume ratio of ionic strength adjustor and water sample is 1:90-120; Stir 5-60min;
3) stir after water sample through filtration treatment, with the content of ammonia in ammonia gas-sensing electrode determination and analysis water sample.
Step 1) in water should meet II grade and the requirement of above reagent water of GB/T6903 regulation.Can be the demineralized water of factory's dispensing or the deionized water of distilled water or ion-exchange acquisition.
Preferably, described step 1) in the mass volume ratio of ash sample and water be 10:100g/mL.
Step 2) ionic strength correctives (ISA) adopt ammonia gas-sensing electrode be suitable for ionic strength adjustor, commercially available.Such as 951211.Wherein, described step 2) in, water sample stirs 8-15min.
Wherein, described step 3) in, the filter medium of filtration water sample is the one in quantitative filter paper, glass fiber filter paper, ultra filtration membrane.
Preferably, described step 3) in, be filter medium by glass fiber filter paper, negative pressure leaching water sample.The equipment of negative pressure leaching and parameter all can adopt conventional equipment and Common Parameters.
Wherein, described ash sample samples from coal-burning boiler flue, is sampled to step 3) time measured between ammonia content is 0-200min.
Preferably, step 3 is sampled to) time measured between ammonia content is 10-60min.
Further, described step 3) in, ammonia gas-sensing electrode is calibrated with ammonia standard solution before measuring ammonia content, and described ammonia standard solution ammonium chloride is prepared, and concentration is 0.0001-0.1mg/mL, and electrode slope is normal between-54mv to-60mv.
In practical operation, every three months uses ammonia titer to verify ammonia gas-sensing electrode, if when verify error is greater than 2%, changes ammonia gas-sensing electrode.
The method that the present invention proposes, according to boiler fired coal situation, can carry out the test of ash sample blank value, ensures measurement result accuracy.
Beneficial effect of the present invention is:
1, have selected rational solvent.
2, different dissolution conditions (as dissolution time, stirring, cement-water ratio, the ash sample amount etc.) impact on ammonia dissolution rate is determined; Demonstrate ash sample stability, sum up ammonia analytic method in ash discharge.
3, current, in the inaccurate situation of online the escaping of ammonia table, research, formulation " in ash ammonia content assay method ", by denitration amount of ammonia slip results of regular determination, data accumulation, instruct denitrating system safety, economy, environmental protection operation.
Accompanying drawing explanation
The comparison diagram of the dissolution rate of ammonia in ash when Fig. 1 is different cement-water ratio.
Fig. 2 is the comparison diagram of different dissolution time to ammonia dissolution rate in ash.
Fig. 3 is the comparison diagram of ammonia dissolution rate in ash before and after water sample pre-service.
Fig. 4 is ash sample holding time comparison diagram.
Embodiment
Now with following most preferred embodiment, the present invention is described, but is not used for limiting the scope of the invention.
In embodiment, the ammonium chloride of preparation ammonia stock solution is the pure ammonium chloride of top grade.High-performance ammonia gas-sensing electrode model is 9512HPBNWP (ORION Ao Lilong company of the U.S.).Electrode filling liquid is 951209, and electrode filling liquid is used in the electrodes; Ionic strength adjustor (ISA) is 951211, and filling liquid and ion regulating agent are all the products of Ao Lilong.
Reagent water is deionized water, meets II grade of GB/T6903 regulation and the requirement of above reagent water.
If no special instructions, the means in embodiment all adopt this area routine techniques means.
Embodiment 1: ash sample disposal route compares
In experimentation, we adopt mode that deionized water directly dissolves ash sample to study the dissolution rate of ammonia in ash, study different dissolution conditions (as: time, stirring, the cement-water ratio etc.) impact on ammonia dissolution rate simultaneously.Analytic process is as follows:
(1), the dissolution rate analysis of ammonia in ash during different cement-water ratio
Get three parts of different ash samples, getting 5g, 10g, 15g, 20g, 25g ash sample for every part is dissolved in 100ml deionized water respectively, be placed on magnetic stirring apparatus, middling speed stirs 10 minutes continuously, after glass fiber filter paper negative-pressure ward filter 23 0s, add 1mL ionic strength adjustor, with the content of ammonia in the ammonia gas-sensing electrode determination and analysis water sample after calibration, result is as shown in table 1 and Fig. 1:
The dissolution rate test of ammonia in ash during table 1 different cement-water ratio
As can be seen from Figure 1, get 10g ash sample when being dissolved in 100ml water, in water sample, in ash, the dissolution rate of ammonia is the highest.
(2), the dissolution rate analysis of ammonia in ash during different dissolution time
Get 10g ash sample to be dissolved in 100ml demineralized water, be placed on magnetic stirring apparatus, stir continuously and place 5min, 10min, 20min, 40min, 60min, after filtration, add 1mL ionic strength adjustor, with the content of ammonia in ammonia gas-sensing electrode determination and analysis water sample, test findings is as shown in table 2 and Fig. 2:
The different dissolution time of table 2 is on the impact of ammonia dissolution rate in ash
As can be seen from Figure 2, when stirring 10min continuously, in water sample, in ash, the dissolution rate of ammonia is the highest.
(3), the analysis of ammonia dissolution rate in ash before and after water sample pre-service
Getting 10g ash sample is dissolved in 100ml demineralized water, be placed on magnetic stirring apparatus, 5min, 10min, 20min, 40min, 60min are placed in continuous stirring, respectively (with glass fiber filter paper negative-pressure ward filter 23 0s) pre-service is filtered to water sample, add 1mL ionic strength adjustor, with the content of ammonia in ammonia gas-sensing electrode determination and analysis water sample, test findings is as shown in table 3 and Fig. 3:
The analysis of ammonia dissolution rate in ash before and after the pre-service of table 3 water sample
As can be seen from Figure 3, after sample filtering, water sample ammonia content slightly increases before filtering, and illustrates that the ammonia content in filter paper is partly transferred in water sample, so, the impact of background values should be considered in test findings.
(4), the research of ash sample stability
In process of the test, ash sample normal temperature after sampling being preserved to different time carries out ammonia content analysis, ammonia steadiness in research ash sample.
Get three parts of ash samples from coal-burning boiler flue after (sequence number 1,2,3), portion is divided by every 10g to ash sample, be stored in hard large mouth plastic sample bottle, respectively after sampling 10min, 30min, 60min, 90min, 120min, 150min, 180min time ammonia content analysis is carried out in ash to same ash sample measure and compare, test findings is as shown in table 4 and Fig. 4:
The research of table 4 ash sample stability
As can be seen from Figure 4, Storage of sample time lengthening, in ash sample, ammonia content can slightly reduce, and may be that the ammonia owing to being adsorbed on ash sample surface is unstable, slowly decomposition causes.Therefore, advise preferably controlling to complete detection time in 1h.
(5), filter paper is on the impact of analysis result
In the process analyzing ammonia content in ash, first we are dissolved in ash sample in a certain amount of demineralized water, the ammonia salt adsorbed in ash sample is allowed to transfer to fully in the middle of solution, buck sample contamination electrode filter membrane is directly measured in order to prevent electrode, grey water sample is carried out Separation of Solid and Liquid by the mode of filtering by us, filtering material should not adsorb the ammonia radical ion of stripping in water sample, and filtering material does not react with ash sample chemical reaction yet.The test preparatory stage, we first selected amount filter paper, glass fiber filter paper, ultra filtration membrane as the filter medium of ash sample, impact filtered fluid ammonia content detected by blank test analytical paper.Select optimum filtration medium.Experimental data is as shown in table 5:
Table 5 filtered gray water medium shaker test
Ammonia dissolution rate test figure as can be seen from ash, 10g ash sample is dissolved in 100ml demineralized water, is placed on magnetic stirring apparatus, stirs continuously when placing 10min and can obtain ammonia stripping water sample in maximum ash.And the stripping quantity of the larger ammonia of cement-water ratio is less, analyzes reason and estimate it is that solution viscosity is larger because cement-water ratio is larger, sample stirs dynamics to be reduced, and the interior ammonia adsorbed of ash sample particle can not fully and aqueous solution contact lysis, cause ammonia dissolution rate in the short time lower.Find in experimentation, if directly with the ammonia density in electrode measurement buck, the ventilated membrane of electrode tip weares and teares and pollutes more serious, affect electrode response time, so we carry out filtration pre-service to water sample, by the change of ammonia content before and after analyzing and processing, after result Graphics Processing, ammonia content is a little more than before process, but ammonia content entire change rule does not become.Therefore, when analyzing the content of ammonia in ash, should terminate to complete analytical test in 1h in sampling, also should consider the impact of background values simultaneously.
Embodiment 2:
Determined the assay method of ammonia content in thermal power plant's flyash by embodiment result, and measure the optimum parameter of ammonia content.Specific as follows:
1) configuration of ammonia standard solution
(1ml is containing 1mgNH for ammonia stock solution
3): accurately take the pure ammonium chloride of top grade that 0.3142g dries 2h at 110 DEG C, be quantitatively transferred in 100ml volumetric flask after dissolving with reagent water, be diluted to scale, shake up.
2) analytical procedure
Multi parameter analysis instrument is used to coordinate ammonia gas-sensing electrode.The check and correction of ammonia electrode is:
First the configuration of standard solution is carried out:
(1ml is containing 0.1mgNH for ammonia standard solution 1
3): get 10ml ammonia stock solution in 100ml volumetric flask with charger, be diluted to scale, shake up.
(1ml is containing 0.01mgNH for ammonia standard solution 2
3): get in 10ml ammonia standard solution 1 to 100ml volumetric flask with charger, be diluted to scale, shake up.
(1ml is containing 0.001mgNH for ammonia standard solution 3
3): get in 10ml ammonia standard solution 2 to 100ml volumetric flask with charger, be diluted to scale, shake up.
Then carry out the inspection of electrode slope: correct electrode with ammonia standard solution 1,2,3 three titers, electrode slope is normal between-54mv to-60mv.
Weigh 10.0g ash sample with balance, be dissolved in the beaker of 100ml demineralized water, be placed on magnetic stirring apparatus, stir continuously and place 10min, with glass fiber filter paper negative-pressure ward filter 23 0s.Get solution to be measured as on magnetic stirring apparatus, put into stirring magneton, add 1ml ion regulating agent with charger, rotate magneton, magneton rate guarantee liquid level of solution calmness to be measured is as the criterion.Be inserted into by ammonia gas-sensing electrode in solution to be measured, notice that electrode does not encounter magneton, when instrument counting is stablized, reading, counts ammonia content value in solution.
The calculating of ammonia content in ash
Ammonia content in ash: in ash, ammonia content refers to the quality of contained ammonia in 1kg flyash, unit: mg/kg.In ash, ammonia content is in the quality of ammonia in 1g ash:
X＝c×v/m
Ammonia content in X-ash, mg/kg;
C-electrode reading, mg/L
V-measurement sample volume, mL;
The ash sample quality of M-take, g.
Ash sample need seal preservation, completes test, prevent ammonia volatilization in ash sample from causing measurement result on the low side after sampling in 1h.
Every three months uses ammonia titer to verify ammonia gas-sensing electrode, if when verify error is greater than 2%, changes ammonia gas-sensing electrode.
According to boiler fired coal situation, need to carry out the test of ash sample blank value, ensure measurement result accuracy.
Embodiment 3, confirmatory experiment
For verifying that in ash, ammonia content measures accuracy, get ash sample and adopt thermogravimetry (TG) to carry out contrast test, with the Measures compare of embodiment 2, result is see table 6.Sampling boiler is system in Beijing Jing energy electric power incorporated company Shijingshan Power Plant No. 1 and No. 3 coal-burning boilers, and this boiler adopts the denitration of low nitrogen burning+SCR method, and sampling spot is positioned at boiler back end ductwork air preheater porch.
Ammonia content measurement result contrast in table 6 electrode method, thermogravimetry ash
Get the display of boiler air preheater entrance ash sample ammonia content analysis result, the test result deviation of two kinds of analytical approachs is little.Thermogravimetry (TG) measures 147 DEG C of ammonium sulfate thermal decomposition values, and the instrument of use is very expensive, and experimental period is long.Electrode method is simple to operate, has equipment investment few, and the advantage such as save time.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various modification that the common engineering technical personnel in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (8)
1. the analysis determining method of ammonia in power plant boiler denitrating flue gas flue dust, is characterized in that, comprise the following steps:
1) directly dissolve ash sample with water, described water is the one in deionized water, demineralized water, distilled water; The mass volume ratio of ash sample and water is 5-20:100g/mL;
2) the water-soluble water sample made of ash sample adds ionic strength adjustor, and the volume ratio of ionic strength adjustor and water sample is 1:90-120; Stir 5-60min;
3) stir after water sample through filtration treatment, with the content of ammonia in ammonia gas-sensing electrode determination and analysis water sample.
2. analysis determining method according to claim 1, is characterized in that, described step 1) in the mass volume ratio of ash sample and water be 10:100g/mL.
3. analysis determining method according to claim 1, is characterized in that, described step 2) in, water sample stirs 8-15min.
4. analysis determining method according to claim 1, is characterized in that, described step 3) in, the filter medium of filtration water sample is the one in quantitative filter paper, glass fiber filter paper, ultra filtration membrane.
5. analysis determining method according to claim 4, is characterized in that, described step 3) in, be filter medium by glass fiber filter paper, negative pressure leaching water sample.
6., according to the arbitrary described analysis determining method of claim 1-5, it is characterized in that, described ash sample samples from coal-burning boiler flue, is sampled to step 3) time measured between ammonia content is 0-200min.
7. analysis determining method according to claim 6, is characterized in that, is sampled to step 3) time measured between ammonia content is 10-60min.
8. according to the arbitrary described analysis determining method of claim 1-5, it is characterized in that, described step 3) in, ammonia gas-sensing electrode is calibrated with ammonia standard solution before measuring ammonia content, described ammonia standard solution ammonium chloride is prepared, concentration is 0.0001-0.1mg/mL, and electrode slope is normal between-54mv to-60mv.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198860A (en) * | 2016-06-28 | 2016-12-07 | 盐城工学院 | A kind of method and system of the escaping of ammonia detection |
| CN106483156A (en) * | 2016-09-30 | 2017-03-08 | 安徽新力电业科技咨询有限责任公司 | A kind of method that utilization XRF obtains SCR denitration ammonia in flue gas escapement ratio |
| CN107300601A (en) * | 2017-08-08 | 2017-10-27 | 盐城工学院 | A kind of assay method of flyash ammonium ion content |
| CN112710532A (en) * | 2020-12-24 | 2021-04-27 | 清华大学 | Flying ash ammonia analytical equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2270484A1 (en) * | 1994-04-21 | 2011-01-05 | NGK Insulators, Ltd. | Electrochemical NOx sensor |
| CN203941133U (en) * | 2014-07-02 | 2014-11-12 | 华北电力科学研究院有限责任公司 | Ammonia content on-line monitoring system in a kind of boiler water of electric power plant |
| CN104458869A (en) * | 2014-11-10 | 2015-03-25 | 深圳泽峰环保技术有限公司 | Online ammonia escape monitoring and analyzing method and online ammonia escape monitoring and analyzing instrument |
-
2015
- 2015-03-27 CN CN201510142140.7A patent/CN104897743A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2270484A1 (en) * | 1994-04-21 | 2011-01-05 | NGK Insulators, Ltd. | Electrochemical NOx sensor |
| CN203941133U (en) * | 2014-07-02 | 2014-11-12 | 华北电力科学研究院有限责任公司 | Ammonia content on-line monitoring system in a kind of boiler water of electric power plant |
| CN104458869A (en) * | 2014-11-10 | 2015-03-25 | 深圳泽峰环保技术有限公司 | Online ammonia escape monitoring and analyzing method and online ammonia escape monitoring and analyzing instrument |
Non-Patent Citations (1)
| Title |
|---|
| 钟智坤 等: "电极法检测灰中氨的样品处理研究", 《华北电力技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198860A (en) * | 2016-06-28 | 2016-12-07 | 盐城工学院 | A kind of method and system of the escaping of ammonia detection |
| CN106483156A (en) * | 2016-09-30 | 2017-03-08 | 安徽新力电业科技咨询有限责任公司 | A kind of method that utilization XRF obtains SCR denitration ammonia in flue gas escapement ratio |
| CN107300601A (en) * | 2017-08-08 | 2017-10-27 | 盐城工学院 | A kind of assay method of flyash ammonium ion content |
| CN112710532A (en) * | 2020-12-24 | 2021-04-27 | 清华大学 | Flying ash ammonia analytical equipment |
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