CN104731122A - pH detection and adjustment method for ammonium nitrate solution for emulsion explosive production - Google Patents
pH detection and adjustment method for ammonium nitrate solution for emulsion explosive production Download PDFInfo
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- CN104731122A CN104731122A CN201410010939.6A CN201410010939A CN104731122A CN 104731122 A CN104731122 A CN 104731122A CN 201410010939 A CN201410010939 A CN 201410010939A CN 104731122 A CN104731122 A CN 104731122A
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Abstract
The invention discloses a pH detection and adjustment method for an ammonium nitrate solution for emulsion explosive production. A mode of lowering the temperature of a sampling solution is adopted, a condenser is additionally arranged, the sampled solution is contained in the condenser for heat exchanging and cooling, or pH automatic detection and pH automatic adjustment are carried out on the ammonium nitrate solution in the aqueous phase preparation link, systematic automatic detection and systematic automatic adjustment on the pH of the ammonium nitrate solution are achieved, the automation application level of the ammonium nitrate solution is improved, and it is guaranteed that the production process is safe.
Description
Technical field
The present invention relates to Emulsion Explosive Production technical field, particularly relate to a kind of ammonium nitrate solution pH and detect and control method.
Background technology
The environmental protection and energy saving in the production of emulsion explosive are applied to due to ammonium nitrate solution, the ammonium nitrate of current domestic application in Emulsion Explosive Production is changed to ammonium nitrate solution gradually, the ammonium nitrate solution used has high temperature (120 DEG C-145 DEG C), the feature of high concentration (91%-93%), ammonium nitrate solution in use, especially easily crystallization, cause ammonium nitrate solution pH in use procedure cannot realize automatically detecting and regulating, simultaneously because ammonium nitrate solution corrosivity is strong, adopt general electrode at high operating temperatures, serviceable life is extremely short, and at high temperature effect temperature compensation is bad, there is certain error in pH measurement, cause and ammonium nitrate solution can not be made quickly to reach the standard value of Emulsion Explosive Production in adjustment process.Above reason causes realizing the robotization in ammonium nitrate solution application process and serialization, and efficiency is low.
Summary of the invention
The object of the invention is to the deficiency overcome in background technology, detection and the control method of a kind of ammonium nitrate solution pH are provided, realize automatic detection and the adjustment of the ammonium nitrate solution pH in the production of emulsion explosive, lifting ammonium nitrate solution is applied to the gentle stability in use of Automated water in Emulsion Explosive Production system, guarantees production run essential safety.
A kind of ammonium nitrate solution pH for Emulsion Explosive Production of the present invention detects and control method, and comprise ammonium nitrate solution pH systems axiol-ogy and control method, described ammonium nitrate solution pH systems axiol-ogy and adjustment method comprise the following steps:
Step one, detection: between ammonium nitrate solution storage tank and surge tank, increasing condenser, described condenser being arranged the pH electrode for detecting ammonium nitrate solution pH value, described pH electrode signal connects converter; When ammonium nitrate solution flows in surge tank from ammonium nitrate solution storage tank after the condenser cooling passing into chilled water, pH electrode pair ammonium nitrate solution carries out continual pH flow detection, realizes the on-line checkingi of ammonium nitrate solution;
Step 2, regulate: tank used for storing ammonia and electric control valve are installed on surge tank, according to the weight of material in the pH value of step one on-line checkingi and ammonium nitrate solution storage tank, ammonium nitrate solution pH is regulated, operating personnel input the measuring-signal that ammonium nitrate solution weight and pH electrode send through converter in intelligent system, intelligent system calculates pH adjustment process automatically, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and automatically adds in surge tank by ammoniacal liquor, be pumped in ammonium nitrate solution storage tank, and jet mixing is carried out to ammonium nitrate solution storage tank, after stirring reaction, pH detection can be carried out to ammonium nitrate solution by the on-line measuring device of pH electrode, determine whether to meet the requirements, if detected value is higher than standard value, intelligent system calculates the weight of the required citric acid added automatically, manually add citric acid to surge tank, open jet mixing, add in ammonium nitrate solution storage tank after citric acid is dissolved, after stirring reaction, pH detection can be carried out by the on-line measuring device of pH electrode to ammonium nitrate solution, determine whether to meet the requirements.
Further, in described step one, when ammonium nitrate solution controls at 85 DEG C-95 DEG C, due to flowing and the rapidity of heat interchange from the temperature of the condenser cooling of ammonium nitrate solution storage tank through passing into chilled water, ammonium nitrate solution fails crystallization, and ammonium nitrate solution pH value is quick and precisely detected.
Above-mentioned ammonium nitrate solution pH detects automatically and control method also comprise Emulsion Explosive Production aqueous phase preparation system detect control method, described step is as follows:
Aqueous phase preparation tank installs tank used for storing ammonia, by the pH value of each dosage and ammonium nitrate solution storage tank on-line checkingi, pH needed for aqueous phase is regulated, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and is automatically added by ammoniacal liquor in aqueous phase preparation tank, and jet mixing is carried out to aqueous phase preparation tank, after stirring reaction, sampling detects pH, has determined whether to meet the requirements; If detected value is higher than standard value, intelligent system calculates the amount of the required citric acid added automatically, manually adds citric acid to aqueous phase preparation tank, open jet mixing, add in aqueous phase preparation tank after being dissolved by citric acid, after stirring reaction, sampling detects pH, has determined whether to meet the requirements.
Intelligent system described in above-mentioned two kinds of methods increases on-the-spot touch-screen and controls and SIEMENS PLC 200 module in existing ammonium nitrate solution control system; If some position is too much, access aqueous phase can be taked to prepare switch board, newly-increased S7-315, digital quantity and analog module, ammonium nitrate solution application and aqueous phase preparation related data are all incorporated to emulsion explosive production line control system.
Compared with prior art, the invention has the advantages that: adopt and reduce sampling solution temperature, guarantee the uncrystallized mode of ammonium nitrate solution simultaneously, increase condenser, sampling solution is placed and carries out heat interchange within the condenser, cooling, after cooling, temperature controls at about 90 DEG C, realize the automatic detection of pH, and automatically calculate adjustment by control system, or prepare link at emulsion explosive water phase and pH is carried out to ammonium nitrate solution automatically detect and regulate, realize automatic detection and the adjustment of ammonium nitrate solution pH being carried out to system, lifting ammonium nitrate solution is applied to the gentle stability in use of Automated water in Emulsion Explosive Production system, guarantee production run essential safety.
Accompanying drawing explanation
Fig. 1 is ammonium nitrate solution systems axiol-ogy of the present invention and the method for adjustment schematic diagram;
Fig. 2 is that aqueous phase preparation system of the present invention detects adjustment method.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Consult Fig. 1, a kind of ammonium nitrate solution pH for Emulsion Explosive Production controls detection system and control method automatically, comprises ammonium nitrate solution system and automatically detects and control method, and described ammonium nitrate solution pH systems axiol-ogy and adjustment method comprise the following steps:
Step one, detection: between ammonium nitrate solution storage tank and surge tank, increasing condenser, described condenser being arranged the pH electrode for detecting ammonium nitrate solution pH value, described pH electrode signal connects converter; When ammonium nitrate solution flows in surge tank from ammonium nitrate solution storage tank after the condenser cooling passing into chilled water, when temperature controls at 85 DEG C-95 DEG C through condenser by ammonium nitrate solution, pH electrode pair ammonium nitrate solution carries out continual pH flow detection, realizes the on-line checkingi of ammonium nitrate solution;
Step 2, regulate: tank used for storing ammonia and electric control valve are installed on surge tank, according to the weight of material in the pH value of step one on-line checkingi and ammonium nitrate solution storage tank, ammonium nitrate solution pH is regulated, operating personnel input the measuring-signal that ammonium nitrate solution weight and pH electrode send through converter in intelligent system, intelligent system calculates pH adjustment process automatically, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and automatically adds in surge tank by ammoniacal liquor, be pumped in ammonium nitrate solution storage tank, and jet mixing is carried out to ammonium nitrate solution storage tank, after stirring reaction, pH detection can be carried out to ammonium nitrate solution by the on-line measuring device of pH electrode, determine whether to meet the requirements, if detected value is higher than standard value, intelligent system calculates the weight of the required citric acid added automatically, manually add citric acid to surge tank, open jet mixing, add in ammonium nitrate solution storage tank after citric acid is dissolved, after stirring reaction, pH detection can be carried out by the on-line measuring device of pH electrode to ammonium nitrate solution, determine whether to meet the requirements.
Above-mentioned condenser is arranged the pH electrode for detecting pH, can install according to prior art as those skilled in the art and realize measuring ability, but those skilled in the art cannot obtain in the experiment of not paying creative work on condenser, install the enlightenment that pH electrode detection is convenient to accurately detect pH value.
Further, in described step one, when ammonium nitrate solution controls 90 DEG C, due to flowing and the rapidity of heat interchange from the temperature of the special construction condenser cooling of ammonium nitrate solution storage tank through passing into chilled water, ammonium nitrate solution fails crystallization, and ammonium nitrate solution pH is quick and precisely detected.
As Fig. 2, above-mentioned ammonium nitrate solution pH detects automatically and control method also comprise Emulsion Explosive Production aqueous phase preparation system detect control method, described step is as follows:
Aqueous phase preparation tank installs tank used for storing ammonia, by each dosage and ammonium nitrate solution storage tank on-line checkingi value, pH needed for aqueous phase is regulated, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and is automatically added by ammoniacal liquor in aqueous phase preparation tank, and jet mixing is carried out to aqueous phase preparation tank, after stirring reaction, sampling detects pH, has determined whether to meet the requirements; If detected value is higher than standard value, intelligent system calculates the amount of the required citric acid added automatically, manually adds citric acid to aqueous phase preparation tank, open jet mixing, add in aqueous phase preparation tank after being dissolved by citric acid, after stirring reaction, sampling detects pH, has determined whether to meet the requirements.
Intelligent system described in above-mentioned two kinds of methods increases on-the-spot touch-screen and controls and SIEMENS PLC 200 module in existing ammonium nitrate solution control system; If some position is too much, access aqueous phase can be taked to prepare switch board, newly-increased S7-315, digital quantity and analog module, ammonium nitrate solution application and aqueous phase preparation related data are all incorporated to emulsion explosive production line control system.
In this case, controlled variable pH is converted to electric signal by pH electrode, pass to transmitter, the shaping of transmitter settling signal and amplification, then the 4-20mA current signal of standard is delivered to SIEMENS PLC 300 through shielded cable and process, machine WINCC intelligent system shows in real time as calculated.
Transmitter selects Rosemount binary channels pH analyser: 1056-01-22-32-A, band two-way isolation and amplifier: 4-20mA.
Potential electrode selects Rosemount3900-2-10, measurement range: 0-14.
Although reference embodiment automatically controls detection system to the disclosed a kind of ammonium nitrate solution pH for Emulsion Explosive Production related to and control method has carried out special description; embodiment described above is illustrative and not restrictive; without departing from the present invention, all changes and amendment are all within protection scope of the present invention.
Claims (4)
1. the ammonium nitrate solution pH for Emulsion Explosive Production detects and a control method, comprises ammonium nitrate solution pH system and automatically detects and control method, it is characterized in that:
Described ammonium nitrate solution pH systems axiol-ogy and adjustment method comprise the following steps:
Step one, detection: between ammonium nitrate solution storage tank and surge tank, increasing condenser, described condenser being arranged the pH electrode for detecting ammonium nitrate solution pH value, described pH electrode signal connects converter; When ammonium nitrate solution flows in surge tank from ammonium nitrate solution storage tank after the condenser cooling passing into chilled water, pH electrode pair ammonium nitrate solution carries out continual pH flow detection, realizes the on-line checkingi of ammonium nitrate solution;
Step 2, regulate: tank used for storing ammonia and electric control valve are installed on surge tank, according to the weight of material in the pH value of step one on-line checkingi and ammonium nitrate solution storage tank, ammonium nitrate solution pH is regulated, operating personnel input the measuring-signal that ammonium nitrate solution weight and pH electrode send through converter in intelligent system, intelligent system calculates pH adjustment process automatically, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and automatically adds in surge tank by ammoniacal liquor, be pumped in ammonium nitrate solution storage tank, and jet mixing is carried out to ammonium nitrate solution storage tank, after stirring reaction, pH detection can be carried out to ammonium nitrate solution by the on-line measuring device of pH electrode, determine whether to meet the requirements, if detected value is higher than standard value, intelligent system calculates the weight of the required citric acid added automatically, manually add citric acid to surge tank, open jet mixing, add in ammonium nitrate solution storage tank after citric acid is dissolved, after stirring reaction, pH detection can be carried out by the on-line measuring device of pH electrode to ammonium nitrate solution, determine whether to meet the requirements.
2. the ammonium nitrate solution pH for Emulsion Explosive Production according to claim 1 detects and control method, it is characterized in that: in described step one, when ammonium nitrate solution from ammonium nitrate solution storage tank through pass into chilled water condenser cooling temperature control at 85 DEG C-95 DEG C, due to flowing and the rapidity of heat interchange, ammonium nitrate solution fails crystallization, and ammonium nitrate solution pH value is quick and precisely detected.
3. the ammonium nitrate solution pH for Emulsion Explosive Production according to claim 1 detects and control method, it is characterized in that: the aqueous phase preparation system pH also comprising Emulsion Explosive Production detects and control method, and described step is as follows:
Aqueous phase preparation tank installs tank used for storing ammonia, by the pH value of each dosage and ammonium nitrate solution storage tank on-line checkingi, pH needed for aqueous phase is regulated, if when detected value is lower than standard value, intelligent system calculates the required ammonia vol added automatically, electric control valve controls tank used for storing ammonia and is automatically added by ammoniacal liquor in aqueous phase preparation tank, and jet mixing is carried out to aqueous phase preparation tank, after stirring reaction, sampling detects pH, has determined whether to meet the requirements; If detected value is higher than standard value, intelligent system calculates the amount of the required citric acid added automatically, manually adds citric acid to aqueous phase preparation tank, open jet mixing, add in aqueous phase preparation tank after being dissolved by citric acid, after stirring reaction, sampling detects pH, has determined whether to meet the requirements.
4. the ammonium nitrate solution pH for Emulsion Explosive Production according to claim 1 and 2 detects and control method, it is characterized in that: described intelligent system increases on-the-spot touch-screen and controls and SIEMENS PLC 200 module in existing ammonium nitrate solution control system; If some position is too much, access aqueous phase can be taked to prepare switch board, newly-increased S7-315, digital quantity and analog module, ammonium nitrate solution application and aqueous phase preparation related data are all incorporated to emulsion explosive production line control system.
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Cited By (5)
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| CN105183026A (en) * | 2015-08-26 | 2015-12-23 | 宁波金和锂电材料有限公司 | Automatic adjustment system for adjusting pH value of crystallization reaction |
| CN107703254A (en) * | 2017-09-14 | 2018-02-16 | 中国神华能源股份有限公司 | A kind of whether qualified method of ammonium nitrate solution pH value in detection emulsion |
| CN111272971A (en) * | 2020-03-10 | 2020-06-12 | 鞍钢矿业爆破有限公司 | Automatic detection system and method for water phase performance of on-site mixed emulsion explosive |
| CN114699985A (en) * | 2022-03-31 | 2022-07-05 | 神华准格尔能源有限责任公司 | Aqueous solution preparation method, apparatus and computer readable storage medium |
| CN115308376A (en) * | 2022-08-19 | 2022-11-08 | 河北冀衡赛瑞化工有限公司 | Method and equipment for online detection of PH of high-concentration and high-temperature ammonium nitrate solution |
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Cited By (7)
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| CN105183026A (en) * | 2015-08-26 | 2015-12-23 | 宁波金和锂电材料有限公司 | Automatic adjustment system for adjusting pH value of crystallization reaction |
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| CN115308376A (en) * | 2022-08-19 | 2022-11-08 | 河北冀衡赛瑞化工有限公司 | Method and equipment for online detection of PH of high-concentration and high-temperature ammonium nitrate solution |
| CN115308376B (en) * | 2022-08-19 | 2023-09-12 | 河北冀衡赛瑞化工有限公司 | Method and equipment for online detection of PH of high-concentration and high-Wen Xiaosuan ammonium solution |
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