CN211784319U - System for detecting production safety of analysis tower - Google Patents
System for detecting production safety of analysis tower Download PDFInfo
- Publication number
- CN211784319U CN211784319U CN202020024085.8U CN202020024085U CN211784319U CN 211784319 U CN211784319 U CN 211784319U CN 202020024085 U CN202020024085 U CN 202020024085U CN 211784319 U CN211784319 U CN 211784319U
- Authority
- CN
- China
- Prior art keywords
- gas
- monitoring point
- tower
- pipeline
- srg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
A system for detecting the production safety of a desorption tower comprises the desorption tower; a heating section, an SRG section and a cooling section are arranged in the desorption tower from top to bottom. And an SRG gas outlet is formed in the side wall of the SRG section. An SRG gas conveying pipeline leading out of the SRG gas outlet is connected to the water washing device. The gas outlet of the water washing device is connected to the drying device via a first conduit. Gas outlet from the drying apparatusThe second pipeline is connected to the conversion system. The gas outlet of the conversion system is connected to the dry suction system via a third pipeline. And a gas outlet of the dry absorption system is connected with a tail gas conveying pipeline. The second pipeline is connected with an air pipeline. The first pipeline is provided with a first monitoring point. Wherein: by detecting O in the first gas2Or CO2The content of (2) judges the working state of the analysis tower. The utility model discloses a to O2Or CO2And the content detection is used for early warning the working state of the analysis tower in advance and providing guidance for stable production of the system.
Description
Technical Field
The utility model relates to a detect analytic tower operating condition's system, concretely relates to detect analytic tower production security's system belongs to active carbon and handles flue gas technical field.
Background
The activated carbon flue gas purification technology has the advantage of multi-pollutant synergistic high-efficiency purification, and is suitable for complex sintering flue gas components (SO)2、NOxDust, O2Water vapor, heavy metal) and large temperature fluctuation (110-.
The activated carbon flue gas purification system is provided with a plurality of subsystems such as an adsorption system, an analysis system and an acid making system, flue gas is purified after passing through the activated carbon adsorption unit, activated carbon particles circularly flow between the adsorption unit and the analysis unit, and cyclic utilization of 'pollutant adsorption → pollutant heating analysis activation (pollutant escape) → cooling → pollutant adsorption' is realized. The adsorption system is a process of adsorbing pollutants in sintering flue gas by using active carbon, and the desorption system is used for heating and regenerating the active carbon adsorbed with the pollutants, so that the activity of the active carbon is ensured to be recovered. The main chemical reactions taking place in the stripper are as follows:
H2SO4·H2O＝SO3+2H2O (Ⅰ)；
SO3+1/2C＝SO2+1/2CO2(Ⅱ)。
the structure of the desorption tower is mainly divided into a heating section, an SRG section and a cooling section, wherein the heating section is used for heating and regenerating the active carbon adsorbed with pollutants, the SRG section is used for taking the regenerated gas out of the tower, the cooling section is used for cooling the regenerated active carbon, and the cooling temperature is required to be below 120 ℃. The active carbon is led out of the tube, the air is led out of the tube, and nitrogen is introduced into the tube, so that the desorption efficiency and the working safety of the desorption tower play an important role in an active carbon flue gas purification system. The operating environment of the desorption tower is severe, the heating section is in a high-temperature high-corrosivity high-water-vapor environment, the temperature difference is extremely large from the upper part to the lower part of the desorption tower, the requirement on the production process preparation level in the desorption tower is extremely high, and particularly the requirement on the sealing property of the tower body is extremely strict.
In the activated carbon flue gas purification process, the influence of the working state of the desorption tower on the whole system is very important, if the phenomenon that air leaks to the tube array occurs in the desorption tower, high-temperature activated carbon in the tube array can react with oxygen in the air to generate a high-temperature combustion phenomenon, great hidden danger is caused on the safety of the whole desorption tower, meanwhile, the temperature of the activated carbon discharged from the system of the desorption tower is also high, the high-temperature activated carbon enters the adsorption tower, and the combustion phenomenon can also occur under the action of the oxygen in the sintering flue gas to cause greater harm, so that the real-time and accurate judgment on the operating state of the desorption tower is very important.
The working state of the analytical tower can be judged by two methods at present, namely measuring the temperature in the tower and measuring the gas components in the tower. At present, the safe operation of the desorption tower in engineering mainly adopts a multipoint temperature measurement mode, detection points are positioned on activated carbon layers such as a heating section outlet, a cooling section outlet and the like, and the working state in the desorption tower is judged through temperature change. However, the temperature measurement by adopting the thermometer can only measure the point position, but can not measure a plane, if the active carbon of a certain high-temperature point misses the temperature detection point, the active carbon enters the adsorption tower through the conveying system, the adsorption tower is in an aerobic state, the high-temperature active carbon is very likely to burn, and great hidden trouble exists in the safe operation of the adsorption system. Alternatively, the gas CO in the desorption tower can be used2/CO/O2And detecting the content, and judging whether the analysis tower has an air leakage phenomenon or not through the change of the gas content. However, the following problems also exist at present: firstly, the conditions in the analytic tower are severe, the corrosivity is strong, the sealing property in the tower must be ensured, and the tower cannot be directly measuredInternal gas composition changes; secondly, aiming at the SRG gas outlet position, the temperature is high (about 400 ℃), the water content is large (about 30 percent), and the SO content is large2High content (about 25%), and CO2Gas analysis devices for continuous measurement operation in such an environment are not commercially available at present.
SUMMERY OF THE UTILITY MODEL
At present, the SRG gas is generally recycled to prepare 98% concentrated sulfuric acid, and an acid making system mainly comprises three systems of a purification process, conversion and dry absorption. The purification process mainly comprises spray washing and demisting, and is mainly used for removing impurities such as moisture, fluorine, ammonia, chlorine, dust and the like in the flue gas and the SRG gas. The dry absorption section of the sulfuric acid adopts the conventional processes of primary drying, secondary absorption and cooling after a circulating acid pump, and is mainly used for absorbing SO3And sulfuric acid is produced. The conversion section adopts a four-section 3+1 type double-contact process to mainly realize SO2High efficiency oxidation.
To the problem that above-mentioned prior art exists, based on the analysis of full process flow, the utility model discloses from the sour process flow angle of system, provide a method and system for detecting analytic tower production security. The utility model discloses gas to possessing the detection condition in the sour technology of system detects, all installs gas analysis appearance at a plurality of check points, detects the safety and stability operation to the analytic tower through gas analysis and judges, guides industrial production.
According to the utility model discloses a first embodiment provides a method for detecting analytical tower production security.
A method for detecting the production safety of a desorption tower comprises the following steps:
1) conveying the activated carbon adsorbed with the pollutants to a feed inlet of an analytical tower, wherein the activated carbon adsorbed with the pollutants sequentially passes through a heating section, an SRG section and a cooling section in the analytical tower;
2) SRG gas is discharged from an SRG gas outlet of an SRG section of the desorption tower, and is conveyed to a water washing device for water washing through an SRG gas conveying pipeline; conveying the first gas obtained after washing to a drying device through a first pipeline for drying; the second gas obtained after drying is added with air and then is sent to a conversion system through a second pipeline for conversion; the third gas obtained after conversion is sent to a dry absorption system through a third pipeline for dry absorption; discharging the acid making tail gas subjected to dry absorption treatment through a tail gas conveying pipeline;
3) the active carbon cooled by the cooling section is discharged from a discharge port of the desorption tower;
wherein: by detecting O in the first gas or the second gas2The content of (2) judges the working state of the analysis tower.
In the present invention, by detecting O in the first gas2The working state of the analysis tower is judged, and the method specifically comprises the following steps:
a first monitoring point is arranged on the first pipeline, and a first gas analyzer is arranged at the first monitoring point. If the first gas analyzer detects O in the first gas in the first pipeline2The content of (b) is 0, which indicates that the analytical tower is operating normally. If the first gas analyzer detects O in the first gas in the first pipeline2If the content of (b) is greater than 0, judging that the gas leakage phenomenon exists in the analysis tower. And when the working state of the analysis tower is judged to be abnormal, stopping the analysis tower for inspection.
In the present invention, by detecting O in the second gas2The working state of the analysis tower is judged, and the method specifically comprises the following steps:
and a second monitoring point is arranged at the position before the second pipeline is mixed with air, and a second gas analyzer is arranged at the second monitoring point. If the second gas analyzer detects O in the second gas in the second pipeline2The content of (b) is 0, which indicates that the analytical tower is operating normally. If the second gas analyzer detects O in the second gas in the second pipeline2If the content of (b) is greater than 0, judging that the gas leakage phenomenon exists in the analysis tower. And when the working state of the analysis tower is judged to be abnormal, stopping the analysis tower for inspection.
According to the utility model discloses a second embodiment provides a method for detecting analytical tower production security.
A method for detecting the production safety of a desorption tower comprises the following steps:
1) conveying the activated carbon adsorbed with the pollutants to a feed inlet of an analytical tower, wherein the activated carbon adsorbed with the pollutants sequentially passes through a heating section, an SRG section and a cooling section in the analytical tower;
2) SRG gas is discharged from an SRG gas outlet of an SRG section of the desorption tower, and is conveyed to a water washing device for water washing through an SRG gas conveying pipeline; conveying the first gas obtained after washing to a drying device through a first pipeline for drying; the second gas obtained after drying is added with air and then is sent to a conversion system through a second pipeline for conversion; the third gas obtained after conversion is sent to a dry absorption system through a third pipeline for dry absorption; discharging the acid making tail gas subjected to dry absorption treatment through a tail gas conveying pipeline;
3) the active carbon cooled by the cooling section is discharged from a discharge port of the desorption tower;
wherein: by detecting CO in any one of the first gas, the second gas, the gas mixed with air in the second gas, the third gas and the tail gas of acid production2And (4) judging the working state of the analysis tower.
In the present invention, the CO in the gas mixed with the air by detecting the first gas, the second gas or the second gas2The working state of the analysis tower is judged, and the method specifically comprises the following steps:
a first monitoring point is arranged on the first pipeline, and a first gas analyzer is arranged at the first monitoring point. And a second monitoring point is arranged at the position before the second pipeline is mixed with air, and a second gas analyzer is arranged at the second monitoring point. And a third monitoring point is arranged at the position, after the air is mixed into the second pipeline, and a third gas analyzer is arranged at the third monitoring point.
Calculating CO in unit time2Yield of (a):
under normal working conditions, the yield of sulfuric acid per unit time in the acid making process is m1Kg, available CO per unit time2Yield m of2Comprises the following steps:
wherein: m1Is a phase of sulfuric acidFor molecular mass, M2Is CO2Relative molecular mass of (2).
The main chemical reaction in the desorption column indicates CO in the gas in the acid production process2Derived from decomposition reactions of sulfuric acid, and thus CO in the gas2The amount of the acid can be reversely deduced from the yield of the sulfuric acid obtained in the acid production step.
② calculating CO2Volume under operating conditions:
a) calculating CO2Volume under standard condition QSign boardL/h, has:
b) measuring the temperature t of the gas at the nth monitoring pointnDEG C, according to an ideal gas state equation, the CO at the monitoring point in unit time can be obtained2Volume Q under operating conditionsGong nComprises the following steps:
wherein n is 1,2 or 3; qI1. theExpressed as CO at the first monitoring Point2Volume under operating conditions, QWorker 2Expressed as CO at the second monitoring point2Volume under operating conditions, QI3Expressed as CO at the third monitoring Point2Volume under operating conditions; t is t1Expressed as the temperature of the gas at the first monitoring point, t2Expressed as the temperature of the gas at the second monitoring point, t3Indicated as the temperature of the gas at the third monitored point.
Calculating CO2Volume fractions of different monitoring points in the acid preparation process are as follows:
measuring the flow Q of the gas at the nth monitoring pointnL/h, can yield CO2Volume fraction phi of different monitoring points in acid making processnComprises the following steps:
wherein: n is 1,2 or 3;Φ1expressed as CO at the first monitoring Point2Volume fraction of (phi)2Expressed as CO at the second monitoring point2Volume fraction of (phi)3Expressed as CO at the third monitoring Point2Volume fraction of (a); q1Expressed as the volume of gas, Q, at the first monitoring point2Expressed as the volume of gas, Q, at the second monitoring point3Expressed as the volume of gas at the third monitoring point.
Setting CO at each monitoring point in the acid making process under the normal working condition2Has a volume fraction of phin mark；
Calculating CO at different monitoring points in acid making process2Volume fraction change value ofn：
Wherein the content of the first and second substances,1indicating CO at the first monitoring Point2The value of the change in volume fraction of (c),2indicating CO at the second monitoring point2The value of the change in volume fraction of (c),3indicating CO at the third monitoring Point2A volume fraction change value of; phi1 LabelIs CO at the first monitoring point under the normal working condition2Volume fraction of (phi)2 labelIs CO at the second monitoring point under the normal working condition2Volume fraction of (phi)3 LabelIs CO at the third monitoring point under the normal working condition2Volume fraction of (a);
when the content is less than or equal to 0 percentnWhen the concentration is less than 10 percent, the operation of the analysis tower is normal;
when in usenWhen the concentration is more than or equal to 10 percent, the phenomenon of air leakage in the desorption tower is illustrated; preferably, when the concentration is 10% or lessnWhen the temperature is less than 20 percent, stopping the operation of the heating section of the analysis tower, and continuing to operate the cooling section of the analysis tower; when in usenAnd when the gas leakage phenomenon is more than or equal to 20 percent, the gas leakage phenomenon is serious because more gaps exist in the desorption tower, and the whole flue gas purification system is stopped at the moment.
In the utility model, CO is generated by acid production and regeneration of the desorption tower2The time of the gas has hysteresis, and the activated carbon is considered to be used for CO in the sintering flue gas2Has a very small content of adsorbedCapacity and CO in SRG gas2Can be slightly dissolved in water during washing, thus introducing the condition coefficient eta, and the formula (4) is converted into:
wherein: eta is a working condition coefficient, and the value of eta is 0.5-0.99, preferably 0.6-0.98, and more preferably 0.7-0.95; phi1' expressed as CO at the first monitoring point under specific working conditions2Volume fraction of (phi)2' expressed as CO at the second monitoring point under specific conditions2Volume fraction of (phi)3' expressed as CO at the third monitoring point under specific working conditions2Volume fraction of (a);
calculating CO under specific working conditions at different monitoring points in acid making process2Volume fraction change value ofn’：
Wherein the content of the first and second substances,1' indicates CO at the first monitoring point under specific conditions2The value of the change in volume fraction of (c),2' indicating CO at specific operating conditions at the second monitoring point2The value of the change in volume fraction of (c),3' indicates CO at the third monitoring Point under specific conditions2A volume fraction change value of; phi1 LabelIs CO at the first monitoring point under the normal working condition2Volume fraction of (phi)2 labelIs CO at the second monitoring point under the normal working condition2Volume fraction of (phi)3 LabelIs CO at the third monitoring point under the normal working condition2Volume fraction of (a);
when the content is less than or equal to 0 percentnWhen the concentration is less than 10 percent, the operation of the analytical tower is normal;
when in usen' when the content is more than or equal to 10 percent, the phenomenon of air leakage in the desorption tower is illustrated; preferably, when the concentration is 10% or lessnWhen the temperature is less than 20 percent, stopping the operation of the heating section of the desorption tower, and continuing to operate the cooling section of the desorption tower; when in usen' when the gas leakage is larger than or equal to 20 percent, the gas leakage phenomenon is serious because more gaps exist in the desorption tower, and the whole smoke is stopped at the momentA gas purification system.
In the utility model, the detection of CO in the third gas or the tail gas of acid production2The working state of the analysis tower is judged, and the method specifically comprises the following steps:
and a fourth monitoring point is arranged on the third pipeline, and a fourth gas analyzer is arranged at the fourth monitoring point. And a fifth monitoring point is arranged on the tail gas conveying pipeline, and a fifth gas analyzer is arranged at the fifth monitoring point.
Measuring the volume fraction X of CO at the third monitoring point3Gas flow Q of the third monitoring point3L/h, CO newly added at the fourth monitoring point after the conversion process2Volume V of4Comprises the following steps:
V4＝Q3*X3…………(6)；
according to equations (5) and (6), CO at the fourth monitoring point can be obtained2Volume fraction of (phi)4Comprises the following steps:
in the acid making process, the gas flow of the third monitoring point, the fourth monitoring point and the fifth monitoring point is basically unchanged, namely Q3≈Q4≈Q5Q, so equation (7) can be simplified as:
CO at the fourth monitoring Point2Volume fraction of (2)
CO at fifth monitoring Point2Volume fraction of (2)
Namely:
calculating CO in the third gas or the tail gas of the acid production in the acid production process2Volume fraction change value ofn：
Wherein n is 4 or 5;4indicating CO at the fourth monitoring Point2The value of the change in volume fraction of (c),5indicating CO at the fifth monitoring Point2A volume fraction change value of; phi4 labelIs CO at the fourth monitoring point under the normal working condition2Volume fraction of (phi)5 BiaoIs CO at the fifth monitoring point under the normal working condition2Volume fraction of (a);
when the content is less than or equal to 0 percentnWhen the concentration is less than 10 percent, the operation of the analysis tower is normal;
when in usenWhen the concentration is more than or equal to 10 percent, the phenomenon of air leakage in the desorption tower is illustrated; preferably, when the concentration is 10% or lessnWhen the temperature is less than 20 percent, stopping the operation of the heating section of the analysis tower, and continuing to operate the cooling section of the analysis tower; when in usenAnd when the gas leakage phenomenon is more than or equal to 20 percent, the gas leakage phenomenon is serious because more gaps exist in the desorption tower, and the whole flue gas purification system is stopped at the moment.
In the utility model, the detection of CO in the third gas or the tail gas of acid production2The working state of the analysis tower is judged, and the method specifically comprises the following steps:
and a fourth monitoring point is arranged on the third pipeline, and a fourth gas analyzer is arranged at the fourth monitoring point. And a fifth monitoring point is arranged on the tail gas conveying pipeline, and a fifth gas analyzer is arranged at the fifth monitoring point.
Measuring the volume fraction X of CO at the second monitoring point2Gas flow Q of the second monitoring point2L/h, CO newly added at the fourth monitoring point after the conversion process2Volume V of4' is:
V4’＝Q2*X2…………(11)；
according to equations (5) and (11), CO at the fourth monitoring point can be obtained2Volume fraction of (phi)4' is:
similarly, the CO at the fifth monitoring point can be obtained2Volume fraction of (phi)5' is:
in the acid making process, the gas flow of the fourth monitoring point and the fifth monitoring point is basically unchanged, namely Q4≈Q5Q, there is:
calculating CO in the third gas or the tail gas of the acid production in the acid production process2Volume fraction change value ofn’：
Wherein n is 4 or 5;4' denotes CO at the fourth monitoring Point2The value of the change in volume fraction of (c),5' denotes CO at the fifth monitoring Point2A volume fraction change value of; phi4 labelIs CO at the fourth monitoring point under the normal working condition2Volume fraction of (phi)5 BiaoIs CO at the fifth monitoring point under the normal working condition2Volume fraction of (a);
when the content is less than or equal to 0 percentnWhen the concentration is less than 10 percent, the operation of the analytical tower is normal;
when in usen' when the content is more than or equal to 10 percent, the phenomenon of air leakage in the desorption tower is illustrated; preferably, when the concentration is 10% or lessnWhen the temperature is less than 20 percent, stopping the operation of the heating section of the desorption tower, and continuing to operate the cooling section of the desorption tower; when in usen' when the gas leakage is more than or equal to 20 percent, the gas leakage phenomenon is serious because more gaps exist in the desorption tower, and the whole flue gas purification system is stopped at the moment.
According to the utility model discloses a third kind of embodiment provides a system for detect analytic tower production security.
A system for detecting the production safety of a desorption tower comprises the desorption tower; a heating section, an SRG section and a cooling section are arranged in the desorption tower from top to bottom. And an SRG gas outlet is formed in the side wall of the SRG section. An SRG gas conveying pipeline leading out of the SRG gas outlet is connected to the water washing device. The gas outlet of the water washing device is connected to the drying device via a first conduit. A second conduit leading from the gas outlet of the drying device is connected to the conversion system. The gas outlet of the conversion system is connected to the dry suction system via a third pipeline. And a gas outlet of the dry absorption system is connected with a tail gas conveying pipeline. The second pipeline is connected with an air pipeline. The first pipeline is provided with a first monitoring point.
Preferably, a second monitoring point is provided on the second conduit upstream of the location where the air conduit connects to the second conduit.
Preferably, a third monitoring point is provided on the second duct downstream of the location where the air duct connects to the second duct.
Preferably, a fourth monitoring point is arranged on the third pipeline; and a fifth monitoring point is arranged on the tail gas conveying pipeline.
Preferably, the first monitoring point is provided with a first gas analyzer.
Preferably, the second monitoring point is provided with a second gas analyzer.
Preferably, the third monitoring point is provided with a third gas analyzer.
Preferably, the fourth monitoring point is provided with a fourth gas analyzer.
Preferably, the fifth monitoring point is provided with a fifth gas analyzer.
Preferably, the system further comprises a gas analyzer, and the gas analyzer is respectively connected with the first monitoring point, the second monitoring point, the third monitoring point, the fourth monitoring point and the fifth monitoring point.
The utility model discloses in, detect O in the first gas through first gas analysis appearance2The content of (2) judges the working state of the analysis tower.
The utility model discloses in, detect O in the second gas through the second gas analysis appearance2The content of (2) judges the working state of the analysis tower.
In the utility model, the first gas and/or the second gas are detected by the gas analyzerO in two gases2The content of (2) judges the working state of the analysis tower.
The utility model discloses in, detect CO in the first gas through first gas analysis appearance2And (4) judging the working state of the analysis tower.
In the utility model, the second gas analyzer is used for detecting CO in the second gas2And (4) judging the working state of the analysis tower.
The utility model discloses in, detect the gaseous CO in the gas after the air is mixed into to the second gas through the third gas analysis appearance2And (4) judging the working state of the analysis tower.
The utility model discloses in, detect CO in the third gas through the fourth gas analysis appearance2And (4) judging the working state of the analysis tower.
The utility model discloses in, detect CO in the system acid tail gas through the fifth gas analyzer2And (4) judging the working state of the analysis tower.
The utility model discloses in, detect gaseous, third gas, make sour tail gas in any kind of gas CO after the air is mixed into to first gas, second gas through gas analysis appearance2And (4) judging the working state of the analysis tower.
In the utility model, because the SRG gas does not contain O2O in the first gas at the first monitoring point can thus be detected by the first gas analyzer2Or by a second gas analyzer, or detecting O in the second gas at the second monitoring point2The operating state of the analytical tower is judged according to the content of the (D). When detecting O in the first gas and the second gas2When the content of (b) is 0, the operation of the analytical tower is normal at the moment. When O is detected in either of the first gas or the second gas2In particular in the detection process, O is greater than 02The content of (b) is also gradually increased, which indicates that there is a gas leakage phenomenon in the analytical tower at this time. When the working state in the analysis tower is judged to be abnormal, the analysis tower is stopped for inspection, or the safest measure is taken to stop the whole flue gas purification system.
In the utility modelAnd the second gas after the drying process replenishes air on the second pipeline. The purpose of the make-up air is to introduce O2Promoting SO2By oxidation to SO3. Wherein the amount of air supplemented is determined by SO in the second gas2Is determined to satisfy O2With SO2The molar ratio of (A) is more than or equal to 0.5: 1. CO in air2The volume fraction was 0.03%.
The utility model discloses in, the main chemical reaction that takes place in the desorption tower is as follows:
H2SO4·H2O＝SO3+2H2O (Ⅰ)；
SO3+1/2C＝SO2+1/2CO2(Ⅱ)。
from the above reaction formula, CO in the gas in the acid production step can be known2Originating from the decomposition reaction of sulfuric acid. Generally, under the conditions of stable feeding speed of the desorption tower and sufficient desorption, CO is generated2Will be substantially stable, and therefore, CO in the gas at each monitoring point in the acid production process can be measured2The working state of the analysis tower is judged according to the content fluctuation.
In the actual process, CO2There are two sources, sulfuric acid decomposition and C oxidation. The CO resolved (decomposed) by the sulfuric acid can be deduced from the yield of the sulfuric acid2Content (c); excess CO2Originating from the oxidation of C. If there is a leak in the stripper, oxidation of C will occur in the stripper: c + O2→CO2(ii) a This in part leads to increased production costs and risks by comparing actual CO2And theoretical CO2The difference between the values (under normal process) can be used to deduce the health status of the analytical tower.
The utility model discloses in, to first monitoring point, second monitoring point or third monitoring point department CO in the gas2The content detection method comprises the following steps: firstly, the CO in the gas in unit time is reversely deduced through the yield of sulfuric acid in unit time in the acid making process under normal working conditions2Produced in amounts of CO2Calculating the amount of CO produced2Volume under standard conditions; simultaneously, the gas flow sum of each monitoring point is measured by a gas analyzerThe temperature, and then the CO at the corresponding monitoring point is calculated2Volume under operating conditions; final CO by measured gas flow and calculation2Determining CO at each monitoring point according to volume under working condition2Volume fraction of (phi)n：
CO is generated due to acid production and regeneration of the desorption tower2The time of the gas has hysteresis, and the activated carbon is considered to be used for CO in the sintering flue gas2Has small content of CO in SRG gas and has small adsorption capacity2Can be slightly dissolved in water in the washing process, so that the working condition coefficient eta is introduced according to the practical process experience, and CO at each monitoring point is obtained through conversion2Volume fraction of (phi)n’：
Wherein: eta is a working condition coefficient, and the value of eta is 0.5-0.99, preferably 0.6-0.98, and more preferably 0.7-0.95.
For CO in gas at the fourth monitoring point or the fifth monitoring point2The content detection method comprises the following steps: firstly, measuring the volume fraction of CO and the volume of gas at a third monitoring point by a gas analyzer, thereby obtaining the newly added CO in the gas at a fourth monitoring point after a conversion process2The volume amount of (a); newly added CO2And the calculated CO at the third monitoring point2The sum of the volumes under the working condition is CO at the fourth monitoring point2Volume under operating conditions; simultaneously, the gas flow at the fourth monitoring point is measured by a gas analyzer, and finally the CO at the fourth monitoring point is obtained2Volume fraction of (a). Between the fourth monitoring point and the fifth monitoring point, the gas is subjected to a dry absorption process, and CO is generated after the dry absorption process2The volume of the third monitoring point, the fourth monitoring point and the fifth monitoring point is basically unchanged, so that the CO at the fifth monitoring point can be obtained in a simplified mode2Is equal to the fourth monitorCO at the measuring point2Volume fraction of (a):
wherein, between the third monitoring point and the fourth monitoring point, the gas passes through a conversion process, and CO and O in the gas2Conversion to CO by reaction2，SO2And O2Conversion to SO by reaction3I.e. from the third monitoring point to the fourth monitoring point, the total gas volume is mainly reduced by O2Volume of (b), and O2Is small relative to the volume of the whole gas, so that O can be omitted2The volume reduction, i.e. the gas flow at the third and fourth monitoring points, is substantially constant. And between the fourth monitoring point and the fifth monitoring point, the gas is subjected to a dry absorption process, sulfuric acid is prepared after the dry absorption process, and the gas flow is basically unchanged. Thus, the gas flow rates of the third, fourth, and fifth monitoring points are substantially constant.
In addition, CO in the gas at the fourth monitoring point or the fifth monitoring point2The content detection method can also comprise the following steps: firstly, the volume fraction of CO at the second monitoring point and the volume of the gas are measured by a gas analyzer, so that the newly added CO in the gas at the fourth monitoring point after the conversion process is solved2The volume amount of (a); newly added CO2And the calculated CO at the second monitoring point2The sum of the volumes under the working condition is CO at the fourth monitoring point2Volume under operating conditions; simultaneously, the gas flow at the fourth monitoring point is measured by a gas analyzer, and finally the CO at the fourth monitoring point is obtained2Volume fraction of (a). The same way can be used to obtain CO at the fifth monitoring point2Volume fraction of (a):
setting CO at each monitoring point in the acid making process under normal working conditions2Volume fraction of (a). CO at each monitoring point obtained by comparing actual calculation2Volume fraction of (2) andCO at each monitoring point under set normal working condition2The volume fraction of the liquid is used for judging the working state of the analysis tower. When in actual production process, the CO obtained by actual calculation2Is not equal to the set CO under the normal working condition2Volume fraction of (or actually calculated CO)2Is greater than the set CO under normal working conditions2The volume fraction of the gas is within a certain range), judging that the phenomenon of gas leakage exists in the analysis tower, and judging that the working state of the analysis tower is abnormal; when in actual production process, the CO obtained by actual calculation2Is equal to the set CO under normal working conditions2Volume fraction of (or actually calculated CO)2Is CO under the set normal working condition2Within a certain range of volume fraction), the operating state of the analytical tower is judged to be normal.
The utility model discloses a further preferred scheme is through calculating each monitoring point department CO2The volume fraction change value (i.e. the deviation) of the analysis tower is used for judging the working state of the analysis tower. CO 22Can be set to a range if the actual calculated CO is2If the volume fraction change value is in the set range, the working state of the analysis tower is normal; if actual calculated CO2If the volume fraction change value exceeds the set range, the working state of the analysis tower is abnormal. CO 22The range of the volume fraction change value of (a) is set according to actual engineering experience. For example, CO is calculated at each monitoring point in the acid production process2Has a volume fraction change value ofn(ii) a When the content is less than or equal to 0 percentnWhen the concentration is less than 10 percent, the operation of the analysis tower is normal; when in usenWhen the concentration is more than or equal to 10 percent, the phenomenon of air leakage in the desorption tower is illustrated; preferably, when the concentration is 10% or lessnWhen the temperature is less than 20 percent, stopping the operation of the heating section of the analysis tower, and continuing to operate the cooling section of the analysis tower; when in usenAnd when the gas leakage phenomenon is more than or equal to 20 percent, the gas leakage phenomenon is serious because more gaps exist in the desorption tower, and the whole flue gas purification system is stopped at the moment.
When the content is less than or equal to 10 percentnLess than 20 percent, which indicates that the small leak seam appears in the tube array in the desorption tower at the moment, the desorption heating process needs to be stopped, the cooling section of the desorption tower continues to operate, the temperature of the desorption tower is reduced, and the desorption tower is stoppedPreparation is made for inspection. When in usen≥20％，CO2The volume fraction change value of (2) is more than the set range, which shows that more gaps are formed in the tube array in the analysis tower at the moment, a large amount of air leaks into the analysis tower, the whole flue gas purification system needs to be stopped immediately, the conveying system stops running, the system is filled with nitrogen for protection, and after the temperature of the analysis tower is reduced, activated carbon is emptied and the condition of pipeline connection is checked. In addition, when CO is present2The volume fraction change value of (2) exceeds the set range, and the temperature change of a cold air outlet of a cooling section of the analysis tower needs to be considered synchronously, because high-temperature flue gas in the analysis tower inevitably enters the cold air outlet after leaked air enters the analysis tower.
Under normal working conditions, CO at each monitoring point2Volume fraction of (A) and O2The contents of (A) are shown in the following table:
in the acid making process, CO is derived from CO in the flue gas adsorbed by the activated carbon, and the CO adsorption amount of the activated carbon to the flue gas is small. Therefore, the utility model discloses in, the CO content is comparatively stable, and is about 1% under the normal conditions, big fluctuation can not appear generally, behind fourth monitoring point, fifth monitoring point, the CO content is extremely low, and normal conditions is about 100ppm, can ignore. In addition, the acid making process is relatively complex, only the main flow unit in the acid making process is detected in the application, and actually, more detection points can be provided.
In the present invention, the height of the desorption column is 8 to 80m, preferably 12 to 60m, more preferably 14 to 40m, and still more preferably 16 to 36 m.
Compared with the prior art, the utility model discloses following beneficial technological effect has:
1. the method and the system of the utility model detect a plurality of positions in the acid making process through the gas analyzer, and the O position is detected2The fluctuation of the content can early warn the working state of the analytical tower in advance and provide guidance for the stable production of the system;
2. the method and the system of the utility model are in processMultiple detection positions in the acid process, and CO is quantified2Normal fluctuation of the content by CO2The fluctuation of the content can early warn the working state of the analytical tower in advance and provide guidance for the stable production of the system;
3. the utility model discloses do not rely on temperature measuring device, do not receive influence such as temperature measuring device quantity or damage, on prior art temperature detection's basis, provide multiple guarantee for whole gas cleaning system's normal steady operation.
Drawings
Fig. 1 is a schematic structural diagram of a system for detecting the safety of the analytical tower in production according to the present invention;
FIG. 2 is a process flow diagram of a method for testing safety in the production of a desorption tower according to the present invention;
fig. 3 is a schematic diagram of another arrangement of a gas analyzer in the system of the present invention.
Reference numerals: a: a resolution tower; 1: a heating section; 2: an SRG segment; 201: an SRG gas outlet; 3: a cooling section; 4: a water washing device; 5: a drying device; 6: a conversion system; 7: a dry suction system; 8: a first gas analyzer; 9: a second gas analyzer; 10: a third gas analyzer; 11: a fourth gas analyzer; 12: a fifth gas analyzer; 13: a gas analyzer;
l0: an SRG gas delivery line; l1: a first conduit; l2: a second conduit; l3: a third pipeline; l4: a tail gas conveying pipeline; l5: an air duct;
p1: a first monitoring point; p2: a second monitoring point; p3: a third monitoring point; p4: a fourth monitoring point; p5: and a fifth monitoring point.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed invention includes but is not limited to the following embodiments.
According to the utility model provides an embodiment provides a system for detect analytic tower production security.
A system for detecting the production safety of a resolving tower comprises a resolving tower A; the heating section 1, the SRG section 2 and the cooling section 3 are arranged in the desorption tower A from top to bottom. The side wall of the SRG section 2 is provided with an SRG gas outlet 201. An SRG gas delivery line L0 leading from the SRG gas outlet 201 is connected to the water washing apparatus 4. The gas outlet of the water washing device 4 is connected to the drying device 5 via a first conduit L1. A second conduit L2 leading from the gas outlet of the drying device 5 is connected to the conversion system 6. The gas outlet of the reforming system 6 is connected to the dry suction system 7 via a third pipe L3. And a gas outlet of the dry absorption system 7 is connected with a tail gas conveying pipeline L4. An air duct L5 is connected to the second duct L2. The first pipeline L1 is provided with a first monitoring point P1.
Preferably, a second monitoring point P2 is provided on the second conduit L2 upstream of the point at which the air conduit L5 connects to the second conduit L2.
Preferably, a third monitoring point P3 is provided on the second conduit L2 downstream of the point where the air conduit L5 connects to the second conduit L2.
Preferably, a fourth monitoring point P4 is arranged on the third pipeline L3; and a fifth monitoring point P5 is arranged on the tail gas conveying pipeline L4.
Preferably, the first monitoring point P1 is provided with a first gas analyzer 8; the second monitoring point P2 is provided with a second gas analyzer 9.
Preferably, the third monitoring point P3 is provided with a third gas analyzer 10.
Preferably, the fourth monitoring point P4 is provided with a fourth gas analyzer 11.
Preferably, the fifth monitoring point P5 is provided with a fifth gas analyzer 12.
Preferably, the system further comprises a gas analyzer 13, and the gas analyzer 13 is connected to the first monitoring point P1, the second monitoring point P2, the third monitoring point P3, the fourth monitoring point P4 and the fifth monitoring point P5 respectively.
The utility model discloses in, detect O in the first gas through first gas analysis appearance 82The content of (b) is judged and analyzed the operating condition of the tower A.
The utility model discloses in, detect O in the second gas through second gas analysis appearance 92The content of (b) is judged and analyzed the operating condition of the tower A.
The utility model disclosesDetecting O in the first gas and/or the second gas by the gas analyzer 132The content of (b) is judged and analyzed the operating condition of the tower A.
The utility model discloses in, detect CO in the first gas through first gas analysis appearance 82The working state of the analysis tower A is judged.
The utility model discloses in, detect CO in the second gas through second gas analysis appearance 92The working state of the analysis tower A is judged.
In the utility model, the third gas analyzer 10 is used for detecting CO in the gas after the second gas is mixed into the air2The working state of the analysis tower A is judged.
In the utility model, the fourth gas analyzer 11 is used for detecting CO in the third gas2The working state of the analysis tower A is judged.
The utility model discloses in, detect CO in the system acid tail gas through fifth gas analyzer 122The working state of the analysis tower A is judged.
The utility model discloses in, detect gaseous, third gas, make sour tail gas in any kind of gas CO after the air is mixed into to first gas, second gas through gas analysis appearance 132The working state of the analysis tower A is judged.
Example 1
As shown in fig. 1, a system for detecting the production safety of a desorption tower comprises a desorption tower A; the heating section 1, the SRG section 2 and the cooling section 3 are arranged in the desorption tower A from top to bottom. The side wall of the SRG section 2 is provided with an SRG gas outlet 201. An SRG gas delivery line L0 leading from the SRG gas outlet 201 is connected to the water washing apparatus 4. The gas outlet of the water washing device 4 is connected to the drying device 5 via a first conduit L1. A second conduit L2 leading from the gas outlet of the drying device 5 is connected to the conversion system 6. The gas outlet of the reforming system 6 is connected to the dry suction system 7 via a third pipe L3. And a gas outlet of the dry absorption system 7 is connected with a tail gas conveying pipeline L4. An air duct L5 is connected to the second duct L2. The first pipeline L1 is provided with a first monitoring point P1, and the first monitoring point P1 is provided with a first gas analyzer 8.
Example 2
Example 1 was repeated except that a second monitoring point P2 was provided on the second conduit L2 upstream of the point where the air conduit L5 was connected to the second conduit L2; the second monitoring point P2 is provided with a second gas analyzer 9.
Example 3
Example 1 was repeated except that a third monitoring point P3 was provided on the second conduit L2 downstream of the point where the air conduit L5 was connected to the second conduit L2, and the third monitoring point P3 was provided with the third gas analyzer 10.
Example 4
Example 1 was repeated except that the third line L3 was provided with the fourth monitoring point P4 and the fourth monitoring point P4 was provided with the fourth gas analyzer 11.
Example 5
Example 1 was repeated except that the exhaust gas duct L4 was provided with a fifth monitoring point P5 and the fifth monitoring point P5 was provided with a fifth gas analyzer 12.
Example 6
A system for detecting the production safety of a resolving tower comprises a resolving tower A; the heating section 1, the SRG section 2 and the cooling section 3 are arranged in the desorption tower A from top to bottom. The side wall of the SRG section 2 is provided with an SRG gas outlet 201. An SRG gas delivery line L0 leading from the SRG gas outlet 201 is connected to the water washing apparatus 4. The gas outlet of the water washing device 4 is connected to the drying device 5 via a first conduit L1. A second conduit L2 leading from the gas outlet of the drying device 5 is connected to the conversion system 6. The gas outlet of the reforming system 6 is connected to the dry suction system 7 via a third pipe L3. And a gas outlet of the dry absorption system 7 is connected with a tail gas conveying pipeline L4. An air duct L5 is connected to the second duct L2. The first pipeline L1 is provided with a first monitoring point P1. A second monitoring point P2 is provided on the second conduit L2 upstream of the point at which the air conduit L5 connects to the second conduit L2. A third monitoring point P3 is provided on the second conduit L2 downstream of the point where the air conduit L5 connects to the second conduit L2. A fourth monitoring point P4 is arranged on the third pipeline L3; and a fifth monitoring point P5 is arranged on the tail gas conveying pipeline L4.
Example 7
Example 6 is repeated except that the system further comprises a gas analyzer 13, the gas analyzer 13 being connected to the first monitoring point P1, the second monitoring point P2, the third monitoring point P3, the fourth monitoring point P4 and the fifth monitoring point P5, respectively.
Example 8
Example 1 was repeated except that O in the first gas was detected by the first gas analyzer 82The content of (b) is judged and analyzed the operating condition of the tower A.
Example 9
Example 2 was repeated except that O in the second gas was detected by the second gas analyzer 92The content of (b) is judged and analyzed the operating condition of the tower A.
Example 10
Example 7 was repeated except that CO in the first gas was detected by the first gas analyzer 82The working state of the analysis tower A is judged.
Example 11
Example 2 was repeated except that CO in the second gas was detected by the second gas analyzer 92The working state of the analysis tower A is judged.
Example 12
Example 3 was repeated except that the CO in the air-admixed gas of the second gas was detected by the third gas analyzer 102The working state of the analysis tower A is judged.
Example 13
Example 4 was repeated except that CO in the third gas was detected by the fourth gas analyzer 112The working state of the analysis tower A is judged.
Example 14
Example 5 was repeated except that CO in the acid production off-gas was detected by the fifth gas analyzer 122The working state of the analysis tower A is judged.
Example 15
Example 7 was repeated except that the gas analyzer 13 was used to detect CO in any of the first gas, the second gas, the gas obtained by blending the second gas with air, the third gas, and the acid production tail gas2The working state of the analysis tower A is judged.
Claims (12)
1. A system for monitoring the safety of a production in a desorption tower, the system comprising a desorption tower (a); a heating section (1), an SRG section (2) and a cooling section (3) are arranged in the resolving tower (A) from top to bottom; an SRG gas outlet (201) is arranged on the side wall of the SRG section (2); the method is characterized in that: an SRG gas conveying pipeline (L0) led out from the SRG gas outlet (201) is connected to the water washing device (4); the gas outlet of the water washing device (4) is connected to the drying device (5) via a first pipeline (L1); a second duct (L2) leading from the gas outlet of the drying device (5) is connected to the conversion system (6); the gas outlet of the conversion system (6) is connected to the dry absorption system (7) via a third pipeline (L3); a gas outlet of the dry absorption system (7) is connected with a tail gas conveying pipeline (L4); an air pipeline (L5) is connected to the second pipeline (L2); a first monitoring point (P1) is arranged on the first pipeline (L1).
2. The system of claim 1, wherein: a second monitoring point (P2) is arranged on the second pipeline (L2) and is positioned upstream of the connecting position of the air pipeline (L5) and the second pipeline (L2).
3. The system according to claim 1 or 2, characterized in that: a third monitoring point (P3) is arranged on the second pipeline (L2) and is positioned at the downstream of the connecting position of the air pipeline (L5) and the second pipeline (L2).
4. The system according to claim 1 or 2, characterized in that: a fourth monitoring point (P4) is arranged on the third pipeline (L3); and a fifth monitoring point (P5) is arranged on the tail gas conveying pipeline (L4).
5. The system of claim 3, wherein: a fourth monitoring point (P4) is arranged on the third pipeline (L3); and a fifth monitoring point (P5) is arranged on the tail gas conveying pipeline (L4).
6. The system of claim 5, wherein: the first monitoring point (P1) is provided with a first gas analyzer (8); and/or
The second monitoring point (P2) is provided with a second gas analyzer (9).
7. The system of claim 6, wherein: a third gas analyzer (10) is arranged at a third monitoring point (P3); and/or
A fourth gas analyzer (11) is arranged at the fourth monitoring point (P4); the fifth monitoring point (P5) is provided with a fifth gas analyzer (12).
8. The system of claim 5, wherein: the system further comprises a gas analyzer (13), wherein the gas analyzer (13) is respectively connected with the first monitoring point (P1), the second monitoring point (P2), the third monitoring point (P3), the fourth monitoring point (P4) and the fifth monitoring point (P5).
9. The system of claim 7, wherein: detecting O in a first gas by a first gas analyzer (8)2Judging the working state of the analysis tower (A) according to the content of the (A); and/or detecting O in the second gas by means of a second gas analyzer (9)2The content of (b) is determined and analyzed.
10. The system of claim 8, wherein: detecting O in the first and/or second gas by means of a gas analyzer (13)2The content of (b) is determined and analyzed.
11. The system of claim 7, wherein:
detecting CO in the gas mixed with the second gas into the air by a third gas analyzer (10)2Judging the working state of the analysis tower (A); and/or
Detecting CO in the third gas by a fourth gas analyzer (11)2Judging the working state of the analysis tower (A); and/or
Detecting CO in the tail gas of acid making by a fifth gas analyzer (12)2Determining the working state of the analysis tower (A).
12. According to the rightThe system of claim 8, wherein: detecting CO in any one of the first gas, the second gas, the gas mixed with the air of the second gas, the third gas and the tail gas of acid making by a gas analyzer (13)2Determining the working state of the analysis tower (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020024085.8U CN211784319U (en) | 2020-01-07 | 2020-01-07 | System for detecting production safety of analysis tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020024085.8U CN211784319U (en) | 2020-01-07 | 2020-01-07 | System for detecting production safety of analysis tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211784319U true CN211784319U (en) | 2020-10-27 |
Family
ID=72888874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020024085.8U Active CN211784319U (en) | 2020-01-07 | 2020-01-07 | System for detecting production safety of analysis tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211784319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403234A (en) * | 2020-04-21 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and system for detecting production safety of analytic tower and acid making system |
-
2020
- 2020-01-07 CN CN202020024085.8U patent/CN211784319U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403234A (en) * | 2020-04-21 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and system for detecting production safety of analytic tower and acid making system |
| CN112403234B (en) * | 2020-04-21 | 2022-12-06 | 中冶长天国际工程有限责任公司 | Method and system for detecting production safety of analytic tower and acid making system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105547388B (en) | A kind of flue gas flow online calibration method for desulphurization denitration control | |
| CN103675203B (en) | A kind of oxides of nitrogen measuring method and system | |
| CN211784319U (en) | System for detecting production safety of analysis tower | |
| CN112403183B (en) | Method and system for detecting production safety of analytical tower | |
| Thomas et al. | Nitrogen oxides scrubbing with alkaline solutions | |
| CN102662028B (en) | Device and method for detecting capability of catalyst in denitration system of coal-fired power plant to oxidize elemental mercury | |
| CN103230743B (en) | A kind of nitrogen oxide tail gas emission method | |
| US20140199771A1 (en) | METHOD AND APPARATUS FOR ANALYSIS AND SELECTIVE CATALYTIC REDUCTION OF NOx-CONTAINING GAS STREAMS | |
| CN114018847A (en) | Device and method for measuring total sulfur content in solid sample | |
| CN204065045U (en) | Denitration demercuration catalyst activity assessment device | |
| CN112403234B (en) | Method and system for detecting production safety of analytic tower and acid making system | |
| CN205850551U (en) | Fire coal boiler fume denitrating system | |
| CN101561374B (en) | Purifying and detecting method of carbon black smoke and device thereof | |
| CN206531829U (en) | A kind of SCR catalyst Performance Test System | |
| CN206587600U (en) | A kind of removing means of adipic acid nitrogen oxide in tail gas | |
| CN206146886U (en) | Ammonia analytic system | |
| CN216046889U (en) | Laboratory is with gaseous feeding device of nitric oxide | |
| Weisweiler et al. | Absorption of NO2/N2O4 in nitric acid | |
| CN210665651U (en) | Inhale desorption testing platform | |
| CN108187445B (en) | Flue gas purification method and device comprising flue gas temperature control | |
| CN108096989B (en) | Flue gas purification method and device comprising flue gas temperature control | |
| CN210604543U (en) | Test device capable of simultaneously testing desulfurization and denitration performance of active coke | |
| CN110124441B (en) | Method and system for treating air leakage of rotary valve | |
| CN217473191U (en) | Automatic gas mixture generating device of ratio | |
| CN201425563Y (en) | Portable carbon black flue gas purification and detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |