CN111157289B - Application method of connecting and sealing device - Google Patents
Application method of connecting and sealing device Download PDFInfo
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- CN111157289B CN111157289B CN201911046843.4A CN201911046843A CN111157289B CN 111157289 B CN111157289 B CN 111157289B CN 201911046843 A CN201911046843 A CN 201911046843A CN 111157289 B CN111157289 B CN 111157289B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses an application method of a connecting and sealing device, wherein the connecting and sealing device is used for automatic injection sampling monitoring of soil and underground water remediation, is arranged at the wellhead of an injection well and is connected with an injection hose corresponding to an injection pump, so that water or a medicament solution in the injection pump can be injected into the injection well, and meanwhile, the injection pressure and flow can be monitored and controlled in real time; the connecting and sealing device can be used for disconnecting the connecting port of the injection hose at any time, can realize the free combination of the connecting and sealing devices of different injection wells and different injection pumps, and can be repeatedly used for many times; when the monitoring equipment needs to collect the underground water sample, the connection sealing device does not need to be disassembled, can directly and quickly collect the underground water sample to a corresponding container, automatically monitors corresponding indexes on line in real time, and is used for setting and operating automatic injection parameters, so that the system effectively improves the working efficiency.
Description
Technical Field
The invention relates to an application method of a connecting and sealing device, and belongs to the technical field of soil and underground water remediation.
Background
Currently, the soil environmental pollution condition of China is generally serious. In 31.8.2018, the fifth meeting of thirteen nationwide general committees passes through the soil pollution prevention and treatment method, and marks milestones of soil treatment in China and legal obligations of soil environment protection and treatment.
The soil remediation technology in China is still in the initial stage, wherein the soil in-situ remediation technology is the soil remediation technology which is just emerging in China, and the in-situ injection technology is relatively more applied to the soil in-situ remediation technology. The in-situ injection technology is to inject water or a medicament into soil and underground water through corresponding injection wells and injection equipment, and to reduce the concentration of the pollutant and the distribution and influence range of the pollutant in the underground environment through the physical, chemical and biological actions between the medicament and the pollutant, so as to achieve the purpose of treating the soil and the underground water, such as in-situ chemical oxidation-reduction, in-situ microbial remediation and the like.
In the existing in-situ injection technology, the connection seal of the injection equipment and the injection well is mainly sealed and fixed by concrete sealing and fixing, glue sealing and fixing, hot melting method and the like, and the method cannot be flexibly disassembled or replaced; the sealed fixed mode of single mouthful of flange only has the injection medicament function, and unable high-speed joint and change pipeline can't gather the sample in real time and real-time supervision knows the operational aspect in the injection well, lacks the efficient operation of system.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a connecting and sealing device for automatic injection sampling monitoring of soil and underground water restoration, which has the functions of convenient replacement, disassembly, real-time monitoring, control and regulation and convenient underground water sample collection while injecting injection water or liquid medicament into an injection well, and can systematically and effectively improve the actual working efficiency.
The invention adopts the following technical scheme for solving the technical problems: the invention designs an application method of a connecting and sealing device, the connecting and sealing device is used for automatic injection sampling monitoring of soil and underground water restoration, and the connecting and sealing device comprises a flange, a flange cover, a first valve, a flowmeter, an injection pump, a water suction pump, a pressure sensor, a pressure release valve, an injection extension pipeline, a sampling extension pipeline and a third valve;
the caliber of the flange is matched with the caliber of the open mouth at the top of the injection well, the mouth of the flange is fixedly butted with the open mouth at the top of the injection well, and one circle of the edge of the flange mouth is hermetically connected with one circle of the open mouth at the top of the injection well; the shape and the size of the flange cover are matched with those of the flange, and the flange cover and the flange are movably connected with each other through bolts arranged on the edges of the flange cover and the flange to realize separation or butt joint;
an injection hole, an air pressure monitoring hole and a sampling hole which penetrate through the upper surface and the lower surface of the flange cover are respectively arranged in the area of the flange cover corresponding to the open opening of the injection well, a straight joint is respectively and fixedly arranged in each hole, each straight joint respectively penetrates through two ends of the hole arranged in the straight joint, the outer diameter of each straight joint is matched with the inner diameter of the hole arranged in the straight joint, the outer side surface of each straight joint is in sealing butt joint with the inner wall of the hole arranged in the straight joint, and the end part of the straight joint in each hole, which faces one side of the injection well, is positioned in the injection well;
the end part of the injection hole, which is directly on the head and is opposite to one side of the injection well, is fixedly butted with one end of a first valve, the other end of the first valve is connected with a flow meter in series through a pipeline and then butted with the output end of an injection pump, and the input end of the injection pump is butted with a container containing liquid medicament or water; the end part of the injection hole, which is directly overhead and faces one side of the injection well, is butted with one end of an injection extension pipeline, the injection extension pipeline is positioned in the injection well, and the other end of the injection extension pipeline is arranged below the water level in the injection well;
the end part of the air pressure monitoring hole, which is directly on the head and is back to one side of the injection well, is in serial connection with a pressure sensor through a pipeline and then is in butt joint with the inlet end of the pressure release valve;
the end part of one side of the sampling hole, which is directly overhead and back to the injection well, is fixedly butted with one end of a third valve, the other end of the third valve is butted with the inlet end of a water suction pump through a pipeline, the side surface of the end part of the pipeline connected with the inlet end of the water suction pump is provided with and communicated with a sampling port in the internal space of the pipeline, the end part of one side of the sampling hole, which is directly overhead and facing the injection well, is butted with one end of a sampling extension pipeline, the sampling extension pipeline is positioned in the injection well, and the other end of the sampling extension pipeline is arranged below the water surface in the injection well.
As a preferred technical scheme of the invention: the pipeline between the first valve and the flowmeter comprises a second valve, a section of flexible pipe and two sections of hard pipes, wherein the end part of one side, facing the flowmeter, of the first valve is fixedly butted with one end of one section of hard pipe, and the other end of the hard pipe is butted with one end of the flexible pipe through a quick connector; the other end of the hose is in butt joint with one end of another hard pipe through a quick connector, the other end of the other hard pipe is in butt joint with one end of a second valve, and the other end of the second valve is in butt joint with the output end of the injection pump after being connected with a flow meter in series through a pipeline.
As a preferred technical scheme of the invention: the pipeline between the third valve and the water pump comprises a hose and two hard pipes, wherein the end part of one side of the third valve, which is back to the injection well, is fixedly connected with one end of one hard pipe, and the other end of the hard pipe is butted with one end of the hose through a quick connector; the other end of the hose is butted with one end of another hard pipe through a quick joint, the other end of the other hard pipe is butted with the inlet end of a water suction pump, and the side surface of the end part of the hard pipe connected with the inlet end of the water suction pump is provided with and communicated with a sampling port of the internal space of the pipeline; and a liquid level meter is arranged in the injection well.
As a preferred technical scheme of the invention: and rubber sealing rings are arranged at the joint positions of the flange and the flange cover.
As a preferred technical scheme of the invention: the injection pump is a positive displacement pump or a vane pump;
the first valve, the second valve and the pressure release valve are respectively one of a ball valve, a stop valve, a gate valve, an electric valve or an electromagnetic valve;
the pressure sensor is one of a remote pressure gauge or a pressure transmitter; the water pump is one of a positive displacement pump or a blade pump, and the lift and the suction lift of the positive displacement pump are larger than the buried depth of underground water.
As a preferred technical scheme of the invention: the material of the straight joint, the material of the flange cover and the material of the flange are the same, and the material of the flange is one of PVC material, PPR material or stainless steel material;
the quick connector is made of PP (polypropylene) materials or stainless steel materials; the hose is one of a PVC hose, a steel wire hose, a fire fighting belt or a cowhells hose, and the hard pipe is one of a PVC water pipe, a PPR water pipe, a galvanized pipe or a steel pipe;
the injection extension pipeline is a hard pipe or a soft pipe; the sampling extension pipeline is one of a plastic pipe, a silicone tube or a rubber tube.
As a preferred technical scheme of the invention: the flow meters are a liquid flow meter, an instantaneous flow meter and an accumulative flow meter which are connected in series; or the flowmeter is one of an electromagnetic flowmeter and an ultrasonic flowmeter which are provided with instantaneous flow measurement and accumulated flow measurement at the same time.
As a preferred technical scheme of the invention: the instantaneous flowmeter is one of a float flowmeter or a rotor flowmeter, the accumulative flowmeter is a water meter, and if the liquid flowmeter is automatically controlled or signals are transmitted, the instantaneous flowmeter and the accumulative flowmeter have a signal remote transmission function.
As a preferred technical scheme of the invention: the sampling extension pipeline is characterized by further comprising a pneumatic pump, wherein the pump head of the pneumatic pump is arranged below the water level in the injection well, the end part, located in the injection well, of the sampling extension pipeline is in butt joint with the water outlet of the pneumatic pump, and the connection arrangement of a water suction pump is cancelled.
In view of the above, the technical problem to be solved by the present invention is to provide an application method based on a connection sealing device, which has the functions of convenient replacement, disassembly, real-time monitoring, control and regulation, convenient underground water sample collection and capability of systematically and effectively improving the actual working efficiency while accessing injection water or liquid medicament to an injection well.
The invention adopts the following technical scheme for solving the technical problems: the invention designs an application method of a connecting and sealing device, which comprises a connecting injection method, a sampling method and a monitoring method, wherein the method comprises the following steps of firstly dividing a target field to obtain each region in the target field, and then respectively executing the following steps aiming at each region in the target field:
step A, sequentially marking the wells in the region in the target field according to the direction from the upstream position to the downstream position, initializing the well mark i to be 1, and the iteration number n to be 1, then respectively installing and connecting sealing devices for the well mouths of injection wells in the region in the target field, and entering step B;
b, setting and updating the ith well as the injection well of the nth iteration, updating the (i + 1) th well as the monitoring well of the nth iteration, and entering the step C;
c, butting the injection pump with the corresponding connecting sealing device of the injection well, switching the connecting sealing device of the injection well to an injection mode, and then entering the step D;
d, controlling the injection pump to work, injecting water or medicament solution into the injection well, adjusting the flow rate of the injection pump to be a preset flow rate, and entering the step E;
e, monitoring the pressure in real time through a pressure sensor in a sealing device connected with the injection well, stopping injection to the injection well and giving an alarm if the monitoring result is not within the preset injection pressure range; otherwise, carrying out no further treatment and entering the step F;
step F, switching a sealing device connected with the monitoring well to a monitoring mode, continuously pumping the underground water out of the injection well, controlling the sealing device connected with the monitoring well to work when a stable flow state is formed in the pumping process, monitoring the temperature, the pH value and the conductivity parameter of the pumped underground water, and realizing the monitoring of the concentration of the target pollutant in the underground water in the region in the target site, wherein when the concentration of the target pollutant is higher than a preset concentration upper limit threshold value, the monitoring is continuously carried out according to a first preset period; when the concentration of the target pollutant is lower than the preset concentration lower limit threshold, continuously monitoring for three times according to a second preset period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold, entering the step G;
g, judging whether n is equal to 1, if so, stopping injecting and monitoring the sealing device connected in the region in the target site, and entering the step I; otherwise, setting and updating the i-1 th well as the current upstream monitoring well of the nth iteration, and entering the step H;
step H, if the sealing device connected with the current upstream monitoring well is monitored and the concentration of the target pollutant is lower than a preset concentration lower limit threshold value, continuously monitoring the current upstream monitoring well for three times according to a preset third period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold value, stopping injection and monitoring of the sealing device connected in the region in the target site, and entering the step I; if the concentration of the target pollutants is higher than the upper limit threshold of the preset concentration during monitoring of the sealing device connected with the current upstream monitoring well, continuously monitoring for three times according to a preset fourth period and each period, wherein if the concentrations of the target pollutants are higher than the upper limit threshold of the preset concentration, stopping injection and monitoring of the sealing device connected in the area in the target field, performing minus 1 updating aiming at the value of n, returning to the previous iteration, returning to the step C, and executing the operation of each operation well in the previous iteration;
i, judging whether the value of I +1 is equal to the number I of wells in the area in the target field, if so, finishing monitoring the concentration of target pollutants in groundwater in the area in the target field; otherwise, adding 1 for updating the value of i and the value of n at the same time, and then returning to the step B.
Compared with the prior art, the connecting and sealing device for automatic injection sampling monitoring for soil and underground water remediation and the application method have the following technical effects:
the connection sealing device for automatic injection sampling monitoring of soil and underground water remediation and the application method thereof can be conveniently disassembled while injecting water or liquid medicament into the injection well, can immediately disconnect and connect the connection ports of the injection well and the hose at any time, can replace different injection wells, and can be repeatedly used for many times; and the pressure and the flow in the injection well can be stably monitored and controlled in real time, and the underground water sample can be rapidly and synchronously collected. Therefore, the underground water sampling device has the functions of convenient replacement, disassembly, real-time monitoring, control and regulation, convenient underground water sample collection and capability of systematically and effectively improving the actual working efficiency.
Drawings
FIG. 1 is a side view of a joint sealing device designed for automated injection sampling monitoring of soil and groundwater remediation in accordance with the present invention;
fig. 2 is a top view of a joint sealing device of the present invention designed for automated injection sampling monitoring of soil and groundwater remediation.
Fig. 3 is a schematic diagram of region division in a target site according to an embodiment of the present invention.
The system comprises a flange cover 1, an injection hole 2, a monitoring hole 3, a sampling hole 4, a hard pipe 5, a pressure sensor 6, a bolt 7, a pressure release valve 8, a quick joint 9, a hose 10, a first valve 11, a flowmeter 12, an injection pump 13, a water suction pump 14, a flange 15, a second valve 16, an injection extension pipeline 17, a sampling extension pipeline 18 and a third valve 19.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention designs a connecting and sealing device for automatic injection sampling monitoring for soil and underground water remediation, which is used for realizing the operation of injecting liquid medicament or water into an injection well; as shown in fig. 1 and fig. 2, in practical application, the system specifically includes a flange 15, a flange cover 1, a first valve 11, a flow meter 12, a syringe pump 13, a suction pump 14, a pressure sensor 6, a pressure relief valve 8, an injection extension line 17, a sampling extension line 18, a third valve 19, a liquid level meter, and a pneumatic pump.
The caliber of the flange 15 is adapted to the caliber of the open mouth at the top of the injection well, the mouth of the flange 15 is fixedly butted with the open mouth at the top of the injection well, and one circle of the edge of the mouth of the flange 15 is hermetically connected with one circle of the open mouth at the top of the injection well; the shape and the size of the flange cover 1 are matched with those of the flange 15, the flange cover 1 and the flange 15 are movably connected with each other through bolts 7 arranged on the edges of the flange cover 1 and are separated or butted, rubber sealing rings are arranged at the butted positions of the flange 15 and the flange cover 1, in practical application, the inner diameter of the flange 15 is 50-300 mm, 4-6 screw ports are arranged on the outer side of the flange 15 and are used for fixing the flange 15 and the flange cover 1, and the rubber sealing rings with the inner diameter of 50-300 mm are arranged between the flange 15 and the flange cover 1 and are used for sealing an injection well.
An injection hole 2, an air pressure monitoring hole 3 and a sampling hole 4 which penetrate through the upper surface and the lower surface of the flange cover 1 are respectively arranged in the area corresponding to the open mouth of the injection well, a straight joint is respectively and fixedly arranged in each hole, each straight joint respectively penetrates through two ends of the hole arranged in the straight joint, the outer diameter of each straight joint is adapted to the inner diameter of the hole arranged in the straight joint, the outer side surface of each straight joint is in sealing butt joint with the inner wall of the hole arranged in the straight joint, and the end part of one side, facing the injection well, of each hole, above the straight joint is positioned in the injection well.
The end part of the injection hole 2 directly above the head and at one side back to the injection well is fixedly butted with one end of a first valve 11, the other end of the first valve 11 is butted with the output end of an injection pump 13 after being connected with a flowmeter 12 in series through a pipeline, and the input end of the injection pump 13 is butted with a container filled with liquid medicament or water; in practical application, the injection pump 13 is specifically designed as a positive displacement pump or a vane pump; the pipeline between the first valve 11 and the flowmeter 12 comprises a second valve 16, a section of flexible pipe 10 and two sections of hard pipes 5, wherein the end part of the first valve 11 facing the flowmeter 12 is fixedly butted with one end of one section of hard pipe 5, and the other end of the hard pipe 5 is butted with one end of the flexible pipe 10 through a quick coupling 9; the other end of the hose 10 is butted with one end of another hard pipe 5 through a quick coupling 9, the other end of the another hard pipe 5 is butted with one end of a second valve 16, and the other end of the second valve 16 is butted with the output end of the injection pump 13 after being connected with the flowmeter 12 in series through a pipeline; the end part of the injection hole 2, which is directly overhead and faces one side of the injection well, is butted with one end of an injection extension pipeline 17, the injection extension pipeline 17 is positioned in the injection well, and the other end of the injection extension pipeline 17 is arranged below the water level in the injection well.
The end part of the air pressure monitoring hole 3 directly above the head and back to one side of the injection well is connected with a pressure sensor 6 in series through a pipeline and then is butted with the inlet end of a pressure release valve 8.
The end part of the sampling hole 4 directly on the head and on one side back to the injection well is fixedly butted with one end of a third valve 19, the other end of the third valve 19 is butted with the inlet end of a water pump 14 through a pipeline, and the side surface of the end part of the pipeline connected with the inlet end of the water pump 14 is provided with a sampling port communicated with the internal space of the pipeline; the pipeline between the third valve 19 and the water pump 14 comprises a hose 10 and two hard pipes 5, wherein the end part of the third valve 19 on the side opposite to the injection well is fixedly connected with one end of one hard pipe 5, and the other end of the hard pipe 5 is butted with one end of the hose 10 through a quick coupling 9; the other end of the hose 10 is butted with one end of another hard pipe 5 through a quick connector 9, the other end of the another hard pipe 5 is butted with the inlet end of a water pump 14, and the side surface of the end part of the hard pipe 5 connected with the inlet end of the water pump 14 is provided with a sampling port communicated with the inner space of the pipeline; the end part of the sampling hole 4 which is directly overhead and faces one side of the injection well is butted with one end of a sampling extension pipeline 18, the sampling extension pipeline 18 is positioned in the injection well, and the other end of the sampling extension pipeline 18 is arranged below the water surface in the injection well.
In the above sampling design, it can also be realized by a pneumatic pump, and the specific design scheme is as follows: the connection arrangement of a water suction pump 14 is omitted, the pump head of the pneumatic pump is arranged below the water level in the injection well, and the end part, positioned in the injection well, of the sampling extension pipeline 18 is butted with the water outlet of the pneumatic pump; a level gauge is disposed in the injection well.
For the application of the pneumatic pump, the pumping of a common ground sampling pump is generally 5-7m at most and rarely exceeds 10m, so that the common ground sampling pump is not suitable for sampling with lower water surface burial depth, and the pneumatic pump can collect water with the burial depth of more than 100 m; and ordinary ground sample pump generally produces the negative pressure with centrifugation or evacuation mode and takes a sample of drawing water, produces certain disturbance to the volatile substances in aqueous, and the immersible pump is also centrifugal pump structure in essence, directly contacts with the water to the velocity of flow is very fast, also can produce great disturbance. The flow rate of the pneumatic pump can be set to be very low, and the air pressure of the pump head is not directly contacted with a water body, so that the disturbance is small.
In practical application, the first valve 11, the second valve 16 and the pressure release valve 8 are respectively one of a ball valve, a stop valve, a gate valve, an electric valve or an electromagnetic valve; the pressure sensor 6 is one of a remote pressure gauge or a pressure transmitter, and in practical application, the pressure sensor 6 adopts a pressure sensor with a measuring range of 0-1.0 Mpa; the water suction pump is one of a positive displacement pump or a blade pump, and the lift and the suction lift of the water suction pump are greater than the buried depth of underground water; the material of the straight joint, the material of the flange cover 1 and the material of the flange 15 are the same, and the material of the flange is one of PVC material, PPR material and stainless steel material; the quick connector 9 is made of PP (polypropylene) materials or stainless steel materials; the hose 10 is one of a PVC hose, a steel wire hose, a fire fighting belt or a beef tendon hose, and the hard pipe 5 is one of a PVC water pipe, a PPR water pipe, a galvanized pipe or a steel pipe; the injection extension pipeline 17 is a hard pipe 5 or a soft pipe 10; the sampling extension pipeline 18 is one of a plastic pipe, a silicone tube or a rubber tube; as a preferred technical scheme of the invention: the flowmeter 12 is a liquid flowmeter, an instantaneous flowmeter and an accumulative flowmeter which are connected in series; or the flowmeter 12 is one of an electromagnetic flowmeter and an ultrasonic flowmeter having both instantaneous flow rate measurement and integrated flow rate measurement; the instantaneous flowmeter is one of a float flowmeter or a rotor flowmeter, the accumulative flowmeter is a water meter, and if the liquid flowmeter is automatically controlled or signals are transmitted, the instantaneous flowmeter and the accumulative flowmeter have a signal remote transmission function; the diameter of the quick connector 9 is 5-50 mm; the diameter of the hose 10 is 5-50 mm.
The connection sealing device for the automatic injection sampling monitoring of the soil and groundwater remediation is specifically applied to an actual working site and comprises a connection injection, sampling and monitoring method, firstly, a target site is divided to obtain each area in the target site, in the specific practical application, 21 wells such as the target site are injected and monitored from outside to inside in an annular mode, the areas are divided into 12 areas, each area comprises 3 wells including an outer upstream, a middle and an inner downstream, the wells in the middle part are shared, the areas in the target site are divided as shown in figure 3, and when the target site runs, the flow of injection wells is set to be 0.1-10m3H is used as the reference value. When the monitoring well collects a water sample, the pneumatic pump is started, the flow is 50-500mL/min, and the concentration of pollutants in the underground water is monitored after the temperature, the pH value and the conductivity parameter of the water sample are stable within 1 min.
Then, aiming at each area in the target site, the following steps are executed:
and step A, sequentially marking the wells in the region in the target field according to the direction from the upstream position to the downstream position, initializing the well mark i to be 1, and the iteration number n to be 1, respectively installing and connecting sealing devices for the well heads of the injection wells in the region in the target field, and entering the step B.
And B, setting and updating the ith well as the injection well of the nth iteration, updating the (i + 1) th well as the monitoring well of the nth iteration, and entering the step C.
And C, butting the injection pump 13 with the corresponding connecting sealing device of the injection well, switching the connecting sealing device of the injection well to an injection mode, and then entering the step D.
And D, controlling the injection pump 13 to work, injecting water or medicament solution into the injection well, adjusting the flow rate of the injection pump 13 to be a preset flow rate, and then entering the step E.
E, monitoring the pressure in real time through a pressure sensor 6 in a sealing device connected with the injection well, stopping injection to the injection well and giving an alarm if the monitoring result is not within a preset injection pressure range; otherwise no further processing is done and step F is entered.
Step F, switching a sealing device connected with the monitoring well to a monitoring mode, continuously pumping the underground water out of the injection well, controlling the sealing device connected with the monitoring well to work when a stable flow state is formed in the pumping process, monitoring the temperature, the pH value and the conductivity parameter of the pumped underground water, and realizing the monitoring of the concentration of the target pollutant in the underground water in the region in the target site, wherein when the concentration of the target pollutant is higher than a preset concentration upper limit threshold value, the monitoring is continuously carried out according to a first preset period; and when the concentration of the target pollutant is lower than the preset concentration lower limit threshold, continuously monitoring for three times according to a second preset period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold, entering the step G.
G, judging whether n is equal to 1, if so, stopping injecting and monitoring the sealing device connected in the region in the target site, and entering the step I; and otherwise, setting and updating the i-1 th well as the current upstream monitoring well of the nth iteration, and entering the step H.
Step H, if the sealing device connected with the current upstream monitoring well is monitored and the concentration of the target pollutant is lower than a preset concentration lower limit threshold value, continuously monitoring the current upstream monitoring well for three times according to a preset third period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold value, stopping injection and monitoring of the sealing device connected in the region in the target site, and entering the step I; and if the concentration of the target pollutants is higher than the upper limit threshold of the preset concentration, continuously monitoring for three times according to a preset fourth period and each period, and if the concentration of the target pollutants is higher than the upper limit threshold of the preset concentration, stopping injection and monitoring of the sealing device connected in the area in the target field, performing minus 1 update on the value of n, returning to the previous iteration, returning to the step C, and executing the operation of each operation well in the previous iteration.
I, judging whether the value of I +1 is equal to the number I of wells in the area in the target field, if so, finishing monitoring the concentration of target pollutants in groundwater in the area in the target field; otherwise, adding 1 for updating the value of i and the value of n at the same time, and then returning to the step B.
The connection sealing device for automatic injection sampling monitoring of soil and groundwater remediation designed by the technical scheme has the advantages that when injection water or liquid medicament is connected into the injection well, the connection sealing device is convenient to replace, disassemble, monitor in real time, control and regulate, and conveniently collect groundwater sample, the actual working efficiency can be systematically and effectively improved, the connection sealing device can be conveniently disassembled, connectors of the injection well and the hose can be immediately disconnected and connected at any time, different injection wells can be replaced, and repeated use is achieved.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (9)
1. An application method of a connecting and sealing device, which is used for automatic injection sampling monitoring of soil and underground water remediation, is characterized in that: the connecting and sealing device comprises a flange (15), a flange cover (1), a first valve (11), a flowmeter (12), an injection pump (13), a water suction pump (14), a pressure sensor (6), a pressure release valve (8), an injection extension pipeline (17), a sampling extension pipeline (18) and a third valve (19);
the caliber of the flange (15) is adapted to the caliber of the open mouth at the top of the injection well, the mouth of the flange (15) is fixedly butted with the open mouth at the top of the injection well, and one circle of the edge of the mouth of the flange (15) is hermetically connected with one circle of the open mouth at the top of the injection well; the shape and the size of the flange cover (1) are matched with those of the flange (15), and the flange cover (1) and the flange (15) are movably connected with each other through bolts (7) arranged at the edges of the flange cover to realize separation or butt joint;
an injection hole (2), an air pressure monitoring hole (3) and a sampling hole (4) which penetrate through the upper surface and the lower surface of the flange cover (1) and correspond to the open opening of the injection well are respectively arranged in the flange cover (1), a straight joint is respectively and fixedly arranged in each hole, each straight joint respectively penetrates through two ends of the hole arranged in the straight joint, the outer diameter of each straight joint is adapted to the inner diameter of the hole arranged in the straight joint, the outer side surface of each straight joint is in sealing butt joint with the inner wall of the hole arranged in the straight joint, and the end part of one side, facing the injection well, of each hole, above the straight joint is positioned in the injection well;
the end part of the injection hole (2) directly on the head and back to one side of the injection well is fixedly butted with one end of a first valve (11), the other end of the first valve (11) is connected with a flow meter (12) in series through a pipeline and then butted with the output end of an injection pump (13), and the input end of the injection pump (13) is butted with a container filled with liquid medicament or water; the end part of the injection hole (2) which is directly overhead and faces one side of the injection well is butted with one end of an injection extension pipeline (17), the injection extension pipeline (17) is positioned in the injection well, and the other end of the injection extension pipeline (17) is arranged below the water level in the injection well;
the end part of the air pressure monitoring hole (3) directly above the head and at one side back to the injection well is connected with a pressure sensor (6) in series through a pipeline and then is butted with the inlet end of a pressure release valve (8);
the end part of one side of the sampling hole (4) which is directly overhead and back to the injection well is fixedly butted with one end of a third valve (19), the other end of the third valve (19) is butted with the inlet end of a water pump (14) through a pipeline, the side surface of the end part of the pipeline connected with the inlet end of the water pump (14) is provided with a sampling port communicated with the internal space of the pipeline, the end part of one side of the sampling hole (4) which is directly overhead and faces the injection well is butted with one end of a sampling extension pipeline (18), the sampling extension pipeline (18) is positioned in the injection well, and the other end of the sampling extension pipeline (18) is arranged below the water level in the injection well;
the application method comprises a connection injection method, a sampling method and a monitoring method, firstly, a target site is divided to obtain each area in the target site, and then the following steps are executed respectively for each area in the target site:
step A, sequentially marking the wells in the region in the target field according to the direction from the upstream position to the downstream position, initializing the well mark i to be 1, and the iteration number n to be 1, then respectively installing and connecting sealing devices for the well mouths of injection wells in the region in the target field, and entering step B;
b, setting and updating the ith well as the injection well of the nth iteration, updating the (i + 1) th well as the monitoring well of the nth iteration, and entering the step C;
c, butting the injection pump (13) with a connecting sealing device corresponding to the injection well, switching the connecting sealing device of the injection well to an injection mode, and then entering the step D;
d, controlling the injection pump (13) to work, injecting water or medicament solution into the injection well, adjusting the flow rate of the injection pump (13) to be a preset flow rate, and entering the step E;
e, monitoring the pressure in real time through a pressure sensor (6) in a sealing device connected with the injection well, stopping injection to the injection well if the monitoring result is not within a preset injection pressure range, and alarming; otherwise, carrying out no further treatment and entering the step F;
step F, switching a sealing device connected with the monitoring well to a monitoring mode, continuously pumping the underground water out of the injection well, controlling the sealing device connected with the monitoring well to work when a stable flow state is formed in the pumping process, monitoring the temperature, the pH value and the conductivity parameter of the pumped underground water, and realizing the monitoring of the concentration of the target pollutant in the underground water in the region in the target site, wherein when the concentration of the target pollutant is higher than a preset concentration upper limit threshold value, the monitoring is continuously carried out according to a first preset period; when the concentration of the target pollutant is lower than the preset concentration lower limit threshold, continuously monitoring for three times according to a second preset period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold, entering the step G;
g, judging whether n is equal to 1, if so, stopping injecting and monitoring the sealing device connected in the region in the target site, and entering the step I; otherwise, setting and updating the i-1 th well as the current upstream monitoring well of the nth iteration, and entering the step H;
step H, if the sealing device connected with the current upstream monitoring well is monitored and the concentration of the target pollutant is lower than a preset concentration lower limit threshold value, continuously monitoring the current upstream monitoring well for three times according to a preset third period, and if the concentrations of the target pollutant are lower than the preset concentration lower limit threshold value, stopping injection and monitoring of the sealing device connected in the region in the target site, and entering the step I; if the concentration of the target pollutants is higher than the upper limit threshold of the preset concentration during monitoring of the sealing device connected with the current upstream monitoring well, continuously monitoring for three times according to a preset fourth period and each period, wherein if the concentrations of the target pollutants are higher than the upper limit threshold of the preset concentration, stopping injection and monitoring of the sealing device connected in the area in the target field, performing minus 1 updating aiming at the value of n, returning to the previous iteration, returning to the step C, and executing the operation of each operation well in the previous iteration;
i, judging whether the value of I +1 is equal to the number I of wells in the area in the target field, if so, finishing monitoring the concentration of target pollutants in groundwater in the area in the target field; otherwise, adding 1 for updating the value of i and the value of n at the same time, and then returning to the step B.
2. The method of claim 1, wherein the sealing device is applied by: the pipeline between the first valve (11) and the flowmeter (12) comprises a second valve (16), a section of flexible pipe (10) and two sections of hard pipes (5), wherein the end part of one side of the first valve (11) facing the flowmeter (12) is fixedly butted with one end of one section of hard pipe (5), and the other end of the hard pipe (5) is butted with one end of the flexible pipe (10) through a quick connector (9); the other end of the hose (10) is in butt joint with one end of another hard pipe (5) through a quick connector (9), the other end of the other hard pipe (5) is in butt joint with one end of a second valve (16), and the other end of the second valve (16) is in butt joint with the output end of an injection pump (13) after being connected with a flowmeter (12) in series through a pipeline.
3. The method of claim 2, wherein the step of applying the joint sealing device comprises: the pipeline between the third valve (19) and the water pump (14) comprises a hose (10) and two sections of hard pipes (5), wherein the end part of one side of the third valve (19), which is back to the injection well, is fixedly connected with one end of one section of hard pipe (5), and the other end of the hard pipe (5) is butted with one end of the hose (10) through a quick joint (9); the other end of the hose (10) is butted with one end of another hard pipe (5) through a quick joint (9), the other end of the another hard pipe (5) is butted with the inlet end of a water pump (14), and the side surface of the end part of the hard pipe (5) connected with the inlet end of the water pump (14) is provided with a sampling port communicated with the inner space of the pipeline; and a liquid level meter is arranged in the injection well.
4. The method of claim 1, wherein the sealing device is applied by: and rubber sealing rings are arranged at the butt joint positions of the flange (15) and the flange cover (1).
5. The method of claim 3, wherein the step of applying the joint sealing device comprises: the injection pump (13) is a positive displacement pump or a vane pump;
the first valve (11), the second valve (16) and the pressure release valve (8) are respectively one of a ball valve, a stop valve, a gate valve, an electric valve or an electromagnetic valve;
the pressure sensor (6) is one of a remote pressure gauge or a pressure transmitter; the water pump is one of a positive displacement pump or a blade pump, and the lift and the suction lift of the positive displacement pump are larger than the buried depth of underground water.
6. The method of claim 3, wherein the step of applying the joint sealing device comprises: the material of the straight joint, the material of the flange cover (1) and the material of the flange (15) are the same, and the material of the flange is one of a PVC material, a PPR material and a stainless steel material;
the quick connector (9) is made of PP (polypropylene) materials or stainless steel materials; the hose (10) is one of a PVC hose, a steel wire hose, a fire fighting belt or a cowhells hose, and the hard pipe (5) is one of a PVC water pipe, a PPR water pipe, a galvanized pipe or a steel pipe;
the injection extension pipeline (17) is a hard pipe (5) or a hose (10); the sampling extension pipeline (18) is one of a plastic pipe, a silicone tube or a rubber tube.
7. The method of claim 3, wherein the step of applying the joint sealing device comprises: the flowmeter (12) is a liquid flowmeter, an instantaneous flowmeter and an accumulative flowmeter which are connected in series; or the flowmeter (12) is one of an electromagnetic flowmeter and an ultrasonic flowmeter having both instantaneous flow rate measurement and integrated flow rate measurement.
8. The method of claim 7, wherein the step of applying the joint sealing device comprises: the instantaneous flowmeter is one of a float flowmeter or a rotor flowmeter, the accumulative flowmeter is a water meter, and if the liquid flowmeter is automatically controlled or signals are transmitted, the instantaneous flowmeter and the accumulative flowmeter have a signal remote transmission function.
9. The method of claim 1, wherein the sealing device is applied by: the connecting and sealing device further comprises a pneumatic pump, wherein the pump head of the pneumatic pump is arranged below the water level in the injection well, the end part of the sampling extension pipeline (18) positioned in the injection well is in butt joint with the water outlet of the pneumatic pump, and the connecting arrangement of a water suction pump (14) is omitted.
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| CN201911046843.4A CN111157289B (en) | 2019-10-30 | 2019-10-30 | Application method of connecting and sealing device |
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| CN201911046843.4A CN111157289B (en) | 2019-10-30 | 2019-10-30 | Application method of connecting and sealing device |
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| CN111157289B true CN111157289B (en) | 2021-09-07 |
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