CN111804723B - In-situ chemical oxidation repair monitoring and regulating system - Google Patents
In-situ chemical oxidation repair monitoring and regulating system Download PDFInfo
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- CN111804723B CN111804723B CN202010698961.XA CN202010698961A CN111804723B CN 111804723 B CN111804723 B CN 111804723B CN 202010698961 A CN202010698961 A CN 202010698961A CN 111804723 B CN111804723 B CN 111804723B
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Abstract
The invention provides an in-situ chemical oxidation remediation monitoring and regulating system, and belongs to the technical field of pollution control. In the in-situ chemical oxidation modification process, various geochemical parameters in soil, underground water and soil gas are comprehensively monitored, a normal data change interval and an expected data up-to-standard inflection point in the repair effect in the repair process are further set according to an early trial or pilot test result, actual monitored data are judged, if the monitored data exceed a normal range, an alarm is given, an adjustment suggestion of medicament injection is given, and after the adjustment suggestion is confirmed on site, a site repair medicament injection system is dynamically adjusted. The invention realizes the comprehensive monitoring of parameters, judges the final repair effect, timely feeds back an accurate adjustment suggestion signal to the in-situ injection control end, and adjusts the parameters such as the injection mode or the injection rate of the chemical repair agent. The invention realizes the aim of in-situ chemical oxidation accurate repair.
Description
Technical Field
The invention relates to the technical field of pollution treatment, in particular to an in-situ chemical oxidation remediation monitoring and regulating system.
Background
With the continuous improvement of the industrial modernization degree, the pollution degree of soil and underground water is more and more serious, and because the pollution of the soil and the underground water causes more and more harm to people, the method is also of great importance for repairing the pollution of the soil and the underground water besides enhancing the environmental awareness and reducing the emission of harmful substances.
In-situ chemical oxidation remediation is a relatively common soil and groundwater pollution remediation technology, namely, the soil or groundwater is remediated at the original position by adopting chemical oxidation reaction, and the toxicity of harmful pollutants in the soil or groundwater is reduced by using an oxidant. In situ chemical oxidation remediation is typically used to remediate primary drainage areas of soil and groundwater contamination sources. The pollution source area may contain pollutants which are not dissolved into the underground water, so that the in-situ remediation can reduce pollution at the source and better protect the underground water.
Typically, an entire in situ chemical oxidation repair system includes a monitoring system, including monitoring during the repair process and monitoring of the effect of the repair after the repair. The monitoring of the repair process is usually performed in a short time before, during and after the injection of the medicament, the monitoring parameters include medicament concentration, temperature, pressure and the like, and if a large amount of gas is generated in the repair process or the site is being used, parameters such as volatile organic pollutants, lower explosion limit LEL and the like also need to be monitored. The main purpose of the repair effect monitoring is to confirm the removal, release and migration of pollutants according to the background conditions before repair, and the monitoring parameters are pollutant concentration, byproduct concentration, metal concentration, pH, oxidation-reduction potential and dissolved oxygen. If the monitoring result shows that the concentration of the pollutants rises, the untreated pollutants exist in the field, and the supplementary injection is needed. At present, the repair process is monitored manually, and automation cannot be realized.
In chinese patent application document CN208213934U, a soil in-situ chemical oxidation compaction injection repairing device is disclosed, which comprises a pharmaceutical unit, a reaction unit and a monitoring unit; the pharmacy unit comprises a pharmacy box, the pharmacy box is connected with a stamping pump, and the stamping pump is connected with the reaction unit through a medicine conveying pipe; the reaction unit comprises an anti-corrosion reactor; the monitoring unit comprises a pH meter, an oxidation-reduction potentiometer, a conductivity meter, an anti-corrosion flow meter, an anti-corrosion pressure meter and a photoionization detector. In the process of injecting the medicine, the flow of the injected medicine and the pressure of the system are adjusted through a medicine delivery valve, the real-time flow and the accumulated flow are measured through an anti-corrosion flowmeter, and the pressure of a compact medicine injection system is monitored through an anti-corrosion pressure gauge; the photoionization detector collects gas generated in the anti-corrosion reactor through the gas collecting pipe, and can monitor the change of VOC content in the reaction process in real time; the pH meter is used for monitoring the pH value in the anti-corrosion reactor, the oxidation-reduction potentiometer is used for monitoring the oxidation-reduction potential in the anti-corrosion reactor, and the conductivity meter is used for monitoring the conductivity in the anti-corrosion reactor; the pH meter, the oxidation-reduction potentiometer and the conductivity meter are respectively connected with the transmission controller, and real-time values of the pH, the oxidation-reduction potential and the conductivity in the reaction process are displayed and recorded on the transmission controller; the waste liquid that the reaction process produced discharges into base formula shallow through flowing back relief valve to through filtration liquid drainage pipe discharge filtration liquid collecting tank, through the analysis of detecting the filtration liquid, judge the degree and the effect of reaction.
The prior art has at least the following disadvantages:
1. all monitoring results need to be analyzed and judged manually, whether data are normal or not, the data need to be analyzed and judged manually, a lot of unnecessary operations are brought, manual adjustment is carried out according to the judging results, and automatic monitoring and regulation and control cannot be achieved.
2. The monitoring data is discrete, which results in a large amount of time for the field engineer to acquire and process the data.
3. The monitoring parameters are less and incomplete, and the accurate judgment of the effect of the in-situ repair process is difficult to effectively realize.
4. The monitoring result is not compared with the prior experience normal range, the monitoring result is directly used as the next operation to cause inaccuracy, and the injection amount is inaccurately adjusted according to the monitoring result.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an in-situ chemical oxidation repair monitoring and regulating system. After in-situ chemical oxidation, comprehensively monitoring various simple and easily-measured geochemical parameters such as temperature, oxidation-reduction potential, conductivity and pH value in soil, underground water and soil gas, which can be monitored on line, comparing actual monitored data with a set data normal change interval in the repair process and a set data up-to-standard expected inflection point in the repair effect according to a data normal change interval in the repair process preset by a system and the data up-to-standard expected inflection point in the repair effect, and alarming and giving an adjustment suggestion if the monitored data exceeds a normal range; if the data reaches the expected inflection point of the data reaching the restoration effect, giving an adjustment suggestion; and after the adjustment suggestion is confirmed or modified by a field engineer, transmitting the finally determined adjustment scheme to a field repair medicament injection system, and dynamically adjusting medicament injection by the field repair medicament injection system according to the adjustment scheme. The invention realizes automatic and comprehensive monitoring of parameters, comprehensively reflects whether the pollution repair process is normal or not and whether the stage effect reaches the repair inflection point (the injection amount of the repair agent in different stages can be optimally adjusted) in the underground complex medium environment (in a non-visible state), automatically judges the final repair effect, automatically feeds back an accurate adjustment suggestion signal to the in-situ injection control end in time, adjusts the injection mode and the injection interval of the chemical repair agent so as to adjust the injection amount of the agent, and achieves the aim of in-situ accurate repair. Not only the field pollution is efficiently and completely removed, but also the human health and the environmental safety are protected; but also realizes the purposes of saving the repair cost, avoiding the problems of secondary pollution such as corrosion caused by excessive medicament and the like, and greatly reducing the labor intensity of field engineers.
The invention provides an in-situ chemical oxidation repair monitoring and regulating system, which comprises:
the monitoring module is used for automatically monitoring parameters of soil, underground water and soil gas in the in-situ chemical oxidation repair process;
the analysis and judgment module judges whether the monitored data is normal or reaches the data standard expected inflection point in the repairing effect according to a data normal change interval in the repairing process preset by the system and the data standard expected inflection point in the repairing effect:
if the data exceeds the normal change interval, automatically sending an alarm to an operation monitoring room, and automatically giving an adjustment suggestion; if the data is in the normal data change interval, not sending an alarm; if the data reaches the expected inflection point of the data reaching the standard in the repairing effect, an adjustment suggestion is automatically given;
for example, if the online monitoring data shows that the early-stage in-situ reaction effect is good, the parameters such as oxidation-reduction potential, pH value and conductivity all reach the expected target, and the analysis and judgment module judges that the data reaches the expected inflection point of the repair effect, the adjustment suggestion of stopping the injection of the medicament is automatically given.
And the regulation and control module automatically transmits the adjustment suggestions to the operation monitoring room in real time, and after the operation monitoring room engineers confirm or correct the received adjustment suggestions, the finally determined adjustment schemes are input into the regulation and control module again, and the adjustment and control module transmits the adjustment and control schemes to the on-site repair medicament injection system, and then the on-site repair medicament injection system automatically performs dynamic adjustment of medicament injection according to the received finally determined adjustment schemes.
The adjustment suggestion is based on a restoration process data normal change interval preset by a previous test result system and an expected inflection point in a restoration effect, and a recommended adjustment suggestion is given for possible adjustment actions, but an emergency may occur actually, so the adjustment suggestion sent by an alarm needs to be confirmed by a field engineer, and the adjustment suggestion is selected to be accepted, ignored or modified.
Preferably, the monitored soil parametersThe method comprises the following steps: the humidity, conductivity and temperature of the soil; parameters of the monitored groundwater include: dissolved oxygen DO, temperature, pH, conductivity, oxidation-reduction potential ORP, sulfate of groundwater; the monitored parameters of soil gas include: in soil gas CH4、CO2The concentration of (c).
The parameters are multi-parameter detection which can be realized by the multi-parameter monitoring probe, and the process of the underground in-situ chemical reaction can be comprehensively judged through multi-evidence comprising multiple media and multiple parameters.
Preferably, the parameters that are automatically monitored are measured by a multi-parameter monitoring probe.
Preferably, the adjustment recommendation comprises: stopping drug injection, increasing the drug injection rate, decreasing the drug injection rate, increasing the drug injection interval, and decreasing the drug injection interval.
Preferably, the confirming or correcting of the received adjustment suggestion includes accepting the adjustment suggestion, ignoring the adjustment suggestion, and modifying the adjustment suggestion.
Preferably, the dynamic adjustments made by the in situ remedial agent injection system include stopping the injection, adjusting the manner and rate of injection, and adjusting the agent injection interval.
Preferably, the dynamic adjustment is realized by controlling the in-situ remediation drug injection system to perform the following operations through the regulation module, and the operations specifically include: closing the valve switch, adjusting the injection mode to be pulse injection or continuous injection, adjusting the valve controlling the injection interval to increase or decrease the injection interval, and adjusting the valve controlling the injection rate to increase or decrease the injection rate.
Preferably, the normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect are set by the system through analysis according to the quantitative relation between the key control parameters in the early-stage small test and the test result and the reaction process.
Typically, this analysis process comprises the following steps:
determining key control parameters based on preliminary lab or pilot plant results in different oxidant reaction systems; the lab scale or pilot scale mainly determines the most important key control parameter influencing the repairing effect comprehensively through the quantitative relation between the injection amount of the medicament, the injection rate, the reaction time and the pollutant removal rate, and the later regulation and control mainly takes the key control parameter, for example, if the medicament amount is determined to be the most sensitive and most important control parameter, the later regulation and control mainly regulates and controls the medicament amount;
constructing a quantitative relation between the dynamic change of the key control parameter and the repair reaction process according to the time sequence change condition of the relevant test data in the early-stage lab scale or the pilot scale result;
determining a normal change interval of data in the repairing process and an inflection point of the data reaching the standard and expected in the repairing effect through curve fitting and parameter sensitivity analysis; and performing fitted curve and parameter sensitivity analysis according to the bench test and the pilot test results to obtain the normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect, and inputting the inflection point into the monitoring and control system of the invention to be used as a reference value of the actual monitoring value.
Preferably, the key control parameter is related to the oxidant used, and needs a thermally activated oxidant, and the key control parameter is temperature; an alkali-activated oxidant is needed, and the key control parameter is the pH value;
preferably, the result of the monitoring module is wirelessly transmitted to the analysis and judgment module, and the adjustment suggestion of the analysis and judgment module is wirelessly transmitted to the regulation and control module.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention realizes the automatic completion of monitoring and regulation by adopting the wireless automatic transmission among the monitoring module, the analysis and judgment module and the regulation and control module, reduces the workload of manually collecting samples, reduces the repeated unnecessary operation of manually paying attention to and analyzing normal data at any time, and reduces the manual work intensity.
(2) The invention monitors the humidity, conductivity and temperature of soil, dissolved oxygen DO of underground water, temperature, pH value, conductivity, oxidation-reduction potential ORP, sulfate and CH in soil gas4、CO2Variation of concentration of (2), parameterMore comprehensive, make follow-up adjustment suggestion more accurate.
(3) According to the method, the normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect are set according to the results of the preliminary small test and the preliminary test, and the normal change interval and the expected inflection point of the data reaching the standard in the repairing process are used for judging whether the monitored data are normal or not, so that comprehensive and accurate data are provided for subsequently giving accurate adjustment suggestions.
(4) According to the invention, the adjustment suggestion is given by the accurate judgment result, and the adjustment suggestion needs to be dynamically adjusted by the on-site repair medicament injection system after on-site confirmation, so that the test data can be combined with the experience of an on-site engineer, and the adjustment scheme is more optimal and reasonable.
Drawings
FIG. 1 is a block diagram of the process of the present invention;
FIG. 2 is a diagram of the field implementation of the present invention.
The specific meanings of the symbols in the drawings are as follows:
the system comprises a repairing agent injection system, a regulation and control module, an analysis and judgment module, a monitoring module (comprising a multi-parameter probe), an underground water level, repairing agent particles injected in 6, a repairing agent injection well screen 7 and pollution particles 8.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings 1-2.
The invention provides an in-situ chemical oxidation repair monitoring and regulating system, which comprises:
the monitoring module is used for automatically monitoring parameters in soil, underground water and soil gas in the in-situ chemical oxidation repair process;
the analysis and judgment module judges whether the monitored data is normal or reaches the data standard expected inflection point in the repairing effect according to a data normal change interval in the repairing process preset by the system and the data standard expected inflection point in the repairing effect:
if the data exceeds the normal change interval, automatically sending an alarm to an operation monitoring room, and automatically giving an adjustment suggestion; if the data is in the normal data change interval, not sending an alarm; if the data reaches the expected inflection point of the data reaching the standard in the repairing effect, an adjustment suggestion is automatically given;
for example, if the online monitoring data shows that the early-stage in-situ reaction effect is good, the parameters such as oxidation-reduction potential, pH value and conductivity all reach the expected target, and the analysis and judgment module judges that the data reaches the expected inflection point of the repair effect, the adjustment suggestion of stopping the injection of the medicament is automatically given.
When the monitored data exceeds the preset normal data change interval in the repair process, the abnormal condition is considered to occur, the system sends an alarm and sends an alarm signal to a field engineer, and an adjustment suggestion is given at the same time, so that the manual work of staring at a data screen at any time is replaced, the simple judgment work of the field engineer on a large amount of normal data can be reduced through automatic judgment and alarm, and the labor intensity of the field engineer is greatly reduced. And meanwhile, an adjustment suggestion is given, so that the judgment process of a field engineer can be simplified, whether the adjustment suggestion is accurate or not can be quickly judged and determined, and if the adjustment suggestion is not accurate, the adjustment suggestion can be corrected in time.
And the regulation and control module automatically transmits the adjustment suggestions to the operation monitoring room in real time, and after the operation monitoring room engineers confirm or correct the received adjustment suggestions, the finally determined adjustment schemes are input into the regulation and control module again, and the adjustment and control module transmits the adjustment and control schemes to the on-site repair medicament injection system, and then the on-site repair medicament injection system automatically performs dynamic adjustment of medicament injection according to the received finally determined adjustment schemes.
The adjustment suggestion is based on a restoration process data normal change interval preset by a previous test result system and an expected inflection point in a restoration effect, and a recommended adjustment suggestion is given for possible adjustment actions, but in an actual situation, an emergency may occur, so the adjustment suggestion sent by an alarm needs to be confirmed by a field engineer, and the adjustment suggestion is selected to be accepted, ignored or modified.
The regulation and control module transmits the regulation suggestion to a field engineer, confirms to execute a regulation scheme of stopping medicament injection after the regulation suggestion is confirmed to be correct by the data of the engineer, and inputs the regulation scheme so that the medicament injection control system executes an injection stopping command. However, the field engineer may also think that the in-situ repair reaction speed can be accelerated by "increasing the drug injection interval" at this time, and may select a modification adjustment suggestion that modifies the adjustment scheme to "increase the drug injection interval" and feed the modified adjustment scheme back to the drug injection control system, and the drug injection control system automatically executes the modified adjustment scheme to "increase the drug injection interval", and adjusts the valve that controls the drug injection interval, and increases the drug injection interval.
As a preferred embodiment, the monitored soil parameters include: the humidity, conductivity and temperature of the soil; parameters of the monitored groundwater include: dissolved oxygen DO, temperature, pH, conductivity, oxidation-reduction potential ORP, sulfate of groundwater; the monitored parameters of soil gas include: in soil gas CH4、CO2The concentration of (c).
The parameters are multiple parameters which can be detected by the multi-parameter monitoring probe, and the process of the underground in-situ chemical reaction can be comprehensively judged through multiple evidences comprising multiple media and multiple parameters.
In a preferred embodiment, the parameters that are automatically monitored are measured by a multi-parameter monitoring probe.
As a preferred embodiment, the adjustment suggestion includes: stopping drug injection, increasing the drug injection rate, decreasing the drug injection rate, increasing the drug injection interval, and decreasing the drug injection interval.
Preferably, the confirming or correcting of the received adjustment suggestion includes accepting the adjustment suggestion, ignoring the adjustment suggestion, and modifying the adjustment suggestion.
In a preferred embodiment, the dynamic adjustment by the in situ remediation agent injection system includes stopping the injection, adjusting the manner and rate of injection, and adjusting the agent injection interval.
As a preferred embodiment, the dynamic adjustment is implemented by the control module controlling the in-situ remediation drug injection system to perform the following operations, which specifically include: closing the valve switch, adjusting the injection mode to be pulse injection or continuous injection, adjusting the valve controlling the injection interval to increase or decrease the injection interval, and adjusting the valve controlling the injection rate to increase or decrease the injection rate.
As a preferred embodiment, the normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect are set by the system through analysis according to the quantitative relation between the key control parameters in the early-stage small test and the test result and the reaction process.
Typically, this analysis process comprises the following steps:
determining key control parameters based on preliminary lab or pilot plant results in different oxidant reaction systems; the lab scale or pilot scale mainly determines the most important key control parameter influencing the repairing effect comprehensively through the quantitative relation between the injection amount of the medicament, the injection rate, the reaction time and the pollutant removal rate, and the later regulation and control mainly takes the key control parameter, for example, if the medicament amount is determined to be the most sensitive and most important control parameter, the later regulation and control mainly regulates and controls the medicament amount;
constructing a quantitative relation between the dynamic change of the key control parameter and the repair reaction process according to the time sequence change condition of the relevant test data in the early-stage lab scale or the pilot scale result;
determining a normal change interval of data in the repairing process and an inflection point of the data reaching the standard and expected in the repairing effect through curve fitting and parameter sensitivity analysis; and performing fitted curve and parameter sensitivity analysis according to the bench test and the pilot test results to obtain the normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect, and inputting the inflection point into the monitoring and control system of the invention to be used as a reference value of the actual monitoring value. If the actual monitoring value is within the normal range, the repairing medicament injection system normally operates; if the normal range is exceeded, an alarm signal is sent out and adjustment advice is given. For example, the temperature preset by the system is in a normal range of 30-60 ℃, if the temperature rises rapidly to be above 65 ℃ in a short period, the system automatically judges that the operation is abnormal, gives an alarm and gives a suggestion of 'adjusting the injection rate'.
As a preferred embodiment, the key control parameter is related to the oxidant used, and needs a thermally activated oxidant, and the key control parameter is temperature; an alkali-activated oxidant is needed, and the key control parameter is the pH value;
in a preferred embodiment, the result of the monitoring module is wirelessly transmitted to the analysis and judgment module, and the adjustment suggestion of the analysis and judgment module is wirelessly transmitted to the regulation and control module.
Example 1
According to a specific embodiment of the present invention, the present invention provides an in situ chemical oxidation remediation monitoring and control system, comprising:
the monitoring module is used for automatically monitoring parameters in soil, underground water and soil gas in the in-situ chemical oxidation repair process; parameters in the monitored soil include: the humidity, conductivity and temperature of the soil; parameters in the monitored groundwater include: dissolved oxygen DO, temperature, pH, conductivity, oxidation-reduction potential ORP, sulfate of groundwater; parameters in the soil gas monitored include: in soil gas CH4、CO2The concentration of (c). The parameters are multi-parameter detection which can be realized by the multi-parameter monitoring probe, and the process of the underground in-situ chemical reaction can be comprehensively judged through multi-evidence comprising multiple media and multiple parameters.
The automatically monitored parameters are measured by a multi-parameter monitoring probe. And the result of the monitoring module is wirelessly transmitted to the analysis and judgment module.
For example, if the preliminary small test and the preliminary test indicate that the temperature in the repair process is an important monitoring index affecting whether the repair system normally operates, the main parameter of interest is the temperature, and of course, other judgment indexes are provided, but no temperature is more significantly represented.
The analysis and judgment module automatically judges whether the monitored data is normal or the data up-to-standard expected inflection point in the repairing effect is reached according to a data normal change interval in the repairing process preset by the system and the data up-to-standard expected inflection point in the repairing effect: if the data exceeds the normal change interval, automatically sending an alarm to an operation monitoring room, and automatically giving an adjustment suggestion; if the data is in the normal data change interval, not sending an alarm; if the data reaches the expected inflection point of the data reaching the standard in the repairing effect, an adjustment suggestion is automatically given; the adjustment suggestion of the analysis and judgment module is transmitted to the regulation and control module through wireless.
The normal change interval of the data in the repairing process and the expected inflection point of the data reaching the standard in the repairing effect are set by the system through analysis according to the quantitative relation between the key control parameters and the reaction process in the early-stage small test and the early-stage test result, the key control parameters are related to the adopted oxidant and need the thermally activated oxidant, and the key control parameters are temperature; an alkali-activated oxidant is required and the key control parameter is the pH.
The adjustment suggestion includes: stopping drug injection, increasing the drug injection rate, decreasing the drug injection rate, increasing the drug injection interval, and decreasing the drug injection interval.
If the online monitoring data show that the early-stage in-situ reaction effect is good, parameters such as oxidation-reduction potential, pH value and conductivity all reach the expected target, and the analysis and judgment module judges that the data reach the expected inflection point of the restoration effect, an adjustment suggestion of stopping medicament injection is automatically given.
When the monitored data exceeds the preset normal data change interval in the repair process, the abnormal condition is considered to occur, the system sends an alarm and sends an alarm signal to a field engineer, and an adjustment suggestion is given at the same time, so that the manual work of staring at a data screen at any time is replaced, the simple judgment work of the field engineer on a large amount of normal data can be reduced through automatic judgment and alarm, and the labor intensity of the field engineer is greatly reduced. And meanwhile, an adjustment suggestion is given, so that the judgment process of a field engineer can be simplified, whether the adjustment suggestion is accurate or not can be quickly judged and determined, and if the adjustment suggestion is not accurate, the adjustment suggestion can be corrected in time.
For example, if the preliminary trial and pilot trial results indicate that temperature is an important monitoring indicator and that the drug injection rate is a key control parameter for repairing the drug injection system, when the temperature is out of the normal range, the adjustment advice mainly adjusts the drug injection rate, i.e., increases the drug injection rate or decreases the drug injection rate, and different advice such as "stop drug injection", "maintain the original drug injection rate", or "decrease the drug injection rate by 50%" may be given. When the medicine injection system normally operates for 5 days, the sudden underground temperature monitoring data suddenly rises to a value outside the normal range in a short term, and the analysis and judgment module determines that the medicine injection is excessive and provides an adjustment suggestion of stopping the medicine injection.
And the regulation and control module automatically transmits the adjustment suggestions to the operation monitoring room in real time, and after the operation monitoring room engineers confirm or correct the received adjustment suggestions, the finally determined adjustment schemes are input into the regulation and control module again, and the adjustment and control module transmits the adjustment and control schemes to the on-site repair medicament injection system, and the on-site repair medicament injection system automatically performs dynamic adjustment of medicament injection according to the received finally determined adjustment schemes.
The confirming or correcting the received adjustment suggestion comprises accepting the adjustment suggestion, ignoring the adjustment suggestion, and modifying the adjustment suggestion. The dynamic adjustments made by the in situ remediation drug infusion system include stopping the infusion, adjusting the infusion regime and infusion rate, and adjusting the drug infusion interval.
The dynamic adjustment is realized by controlling the field repair medicament injection system to perform the following operations through a regulation module, and the operations specifically comprise: closing the valve switch, adjusting the injection mode to be pulse injection or continuous injection, adjusting the valve controlling the injection interval to increase or decrease the injection interval, and adjusting the valve controlling the injection rate to increase or decrease the injection rate. The adjustment suggestion is based on a restoration process data normal change interval preset by a previous test result system and an expected inflection point in a restoration effect, and a recommended adjustment suggestion is given for possible adjustment actions, but in an actual situation, an emergency may occur, so the adjustment suggestion sent by an alarm needs to be confirmed by a field engineer, and the adjustment suggestion is selected to be accepted, ignored or modified.
For example, in the analysis and judgment module, when the adjustment suggestion given by the analysis and judgment module is "stop drug injection", the suggestion is wirelessly transmitted to the regulation and control module, the regulation and control module transmits the adjustment suggestion of "stop drug injection" to a field engineer, after the engineer checks, if the adjustment suggestion given by the analysis and judgment module is reasonable, the adjustment suggestion of "stop drug injection" is confirmed to be executed, the determined adjustment suggestion of "stop drug injection" is transmitted to the repair injection system, and the repair injection system closes the injection valve according to the adjustment suggestion; alternatively, if the engineer integrates the change of other parameters, such as the data of the oxidation-reduction potential, etc., and considers that the injection rate of the chemical is reduced by 50% to solve the problem of the over-temperature, and the reaction speed is increased compared with the stopping of the chemical injection, the engineer modifies the adjustment suggestion to "reduce the injection rate of the chemical by 50%", and transmits the modification suggestion to the repair injection system, and the repair injection system adjusts the valve controlling the injection rate of the chemical to be 50% of the current injection rate according to the modification suggestion.
In the in-situ chemical oxidation process, the invention comprehensively monitors the geochemical parameters such as temperature, oxidation-reduction potential, conductivity, pH value and the like in soil, underground water and soil gas, sets a data normal change interval in the repair process and a data up-to-standard expected inflection point in the repair effect according to the early-stage pilot test and pilot test results, compares the actual monitoring data with the set data normal change interval in the repair process and the data up-to-standard expected inflection point in the repair effect, alarms and gives an adjustment suggestion if the monitoring data exceeds the normal range, and dynamically adjusts the in-situ repair medicament injection system after the adjustment suggestion is confirmed or corrected in the field. The invention realizes the comprehensive monitoring of parameters, judges the final repair effect, timely feeds back an accurate adjustment suggestion signal to the in-situ injection control end, adjusts the injection amount and the injection mode of the chemical repair agent and achieves the aim of in-situ accurate repair.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. An in-situ chemical oxidation remediation monitoring and regulation system, comprising:
the monitoring module is used for automatically monitoring parameters of soil, underground water and soil gas in the in-situ chemical oxidation repair process;
the analysis and judgment module judges whether the monitored data is normal or reaches the data standard expected inflection point in the repairing effect according to a data normal change interval in the repairing process preset by the system and the data standard expected inflection point in the repairing effect:
if the data exceeds the normal change interval, an alarm is automatically sent to an operation monitoring room, and an adjustment suggestion is automatically given according to key control parameters influencing the repair effect; if the data is in the normal data change interval, not sending an alarm; if the data reaches the expected inflection point of the data reaching the standard in the repairing effect, automatically giving an adjustment suggestion according to key control parameters influencing the repairing effect;
the data standard expected inflection point in the data normal change interval and the repairing effect is determined by the following method:
determining key control parameters and monitoring data influencing the repairing effect according to the quantitative relation among the injection amount, the injection rate, the reaction time and the pollutant removal rate of the medicament in the pilot plant test or the pilot plant test;
determining a normal data change interval and an expected inflection point of the data reaching the standard in the repairing effect according to the change interval of the monitored data;
the adjustment suggestion includes: stopping drug injection, increasing the drug injection rate, decreasing the drug injection rate, increasing the drug injection interval, and decreasing the drug injection interval;
the regulation and control module automatically transmits the adjustment suggestions to the operation monitoring room in real time, after the operation monitoring room engineers confirm or correct the received adjustment suggestions, the finally determined adjustment scheme is input into the regulation and control module again, the regulation and control module transmits the adjustment scheme to the on-site repair medicament injection system, and the on-site repair medicament injection system automatically performs dynamic adjustment of medicament injection according to the received finally determined adjustment scheme;
the dynamic adjustment by the in-situ remediation drug injection system comprises stopping drug injection, adjusting injection mode and injection rate, and adjusting drug injection interval;
the dynamic adjustment is realized by controlling the field repair medicament injection system to perform the following operations through a regulation module, and the operations specifically comprise: closing the valve switch, adjusting the injection mode to be pulse injection or continuous injection, adjusting the valve controlling the injection interval to increase or decrease the injection interval, and adjusting the valve controlling the injection rate to increase or decrease the injection rate.
2. The monitoring and control system of claim 1, wherein the monitored soil parameters comprise: the humidity, conductivity and temperature of the soil; parameters of the monitored groundwater include: dissolved oxygen DO, temperature, pH, conductivity, oxidation-reduction potential ORP, sulfate of groundwater; the monitored parameters of soil gas include: in soil gas CH4、CO2The concentration of (c).
3. The monitoring and control system of claim 1, wherein the automatically monitored parameters are measured by a multi-parameter monitoring probe.
4. The monitoring and control system of claim 1, wherein the confirmation or modification of the received adjustment recommendation comprises accepting the adjustment recommendation, ignoring the adjustment recommendation, and modifying the adjustment recommendation.
5. The system of claim 1, wherein the key control parameter is related to the oxidant employed, requiring a thermally activated oxidant, the key control parameter being temperature; an alkali-activated oxidant is required and the key control parameter is the pH.
6. The system of claim 1, wherein the results of the monitoring module are wirelessly transmitted to the analysis and judgment module, and the adjustment suggestions of the analysis and judgment module are wirelessly transmitted to the regulation and control module.
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| CN113655201B (en) * | 2021-08-12 | 2024-03-26 | 上海景观实业发展有限公司 | Wetland soil protection system |
| CN114904899B (en) * | 2022-05-09 | 2023-01-20 | 深圳市森斯环境艺术工程有限公司 | Polluted soil treatment method and system |
| CN116102100B (en) * | 2023-03-23 | 2023-06-20 | 厚普环保科技(苏州)有限公司 | Water quality restoration feedback control method and system based on Internet of things equipment |
| CN116794109B (en) * | 2023-08-25 | 2023-11-21 | 中国环境科学研究院 | Soil restoration monitoring system |
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