CN210465228U - Device for monitoring dynamic corrosion of industrial wastewater discharge pipe in real time - Google Patents
Device for monitoring dynamic corrosion of industrial wastewater discharge pipe in real time Download PDFInfo
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- CN210465228U CN210465228U CN201921041620.4U CN201921041620U CN210465228U CN 210465228 U CN210465228 U CN 210465228U CN 201921041620 U CN201921041620 U CN 201921041620U CN 210465228 U CN210465228 U CN 210465228U
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Abstract
The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time comprises a corrosion medium storage and updating system, an electrochemical workstation, a tested component, an infusion pump, a master control valve and a flowmeter. The corrosive medium storing and updating system consists of a first liquid storage tank, a second liquid storage tank, a first liquid outlet valve, a second liquid outlet valve, a first liquid return valve, a second liquid return valve, a first sampling valve, a second sampling valve and a pipe fitting for connection; the tested assembly consists of a rectangular annular tube and at least one set of electrode group arranged on the rectangular annular tube; the number of the electrochemical work stations is the same as that of the electrode groups, and the sample, the auxiliary electrode and the reference electrode in each set of the electrode groups are respectively connected with the corresponding electrochemical work stations through leads. The device can realize the monitoring of different structural parts of the industrial wastewater discharge pipe, improve the monitoring precision and replace the industrial wastewater under the condition of not closing the infusion pump.
Description
Technical Field
The utility model belongs to chemical industry equipment corrodes and corrodes dynamic process monitoring field, relates to a device that real-time supervision industrial waste water delivery pipe developments corrodes.
Background
A large amount of high-concentration salt-containing industrial wastewater is generated in the chemical production process, the salt-containing industrial wastewater seriously corrodes pipelines, if the salt-containing industrial wastewater is not discovered in time, a great safety accident is caused, and serious economic loss is caused, so that the real-time monitoring of the pipeline corrosion is necessary.
Regarding real-time monitoring of pipeline corrosion by industrial wastewater, the device cannot be separated, but the content disclosed in the prior art is not much. CN 201510024664.6 discloses a monitoring system for metal corrosion behavior in a flowing corrosive medium, which comprises a corrosive medium updating system, a circulating pipeline system, an electrochemical testing system and a weight loss experimental device. Although the monitoring system can be used for monitoring the corrosion condition of the metal material in the flowing corrosive medium, the following problems exist: (1) because the electrochemical testing pipe fitting is a glass straight pipe with a three-electrode testing device, the corrosion condition of the straight pipe of the industrial wastewater discharge pipe can be monitored only, and the corrosion condition of the corner or the pipe diameter change part of the industrial wastewater discharge pipe cannot be monitored; (2) because the top of one end of the working electrode extending into the glass straight tube is embedded with a prefabricated metal material test piece, the reference electrode is a saturated calomel electrode obliquely inserted into the glass straight tube, and the top end of the reference electrode is opposite to the lower end of the working electrode, the influence of the flow pattern change of a corrosive medium on a monitoring result is difficult to avoid, and the monitoring precision is reduced; (3) because only one water storage tank is arranged in the corrosive medium updating system, the circulating pipeline system is provided with a water outlet for draining liquid, and the circulating pump needs to be closed when the corrosive medium is replaced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a device of real-time supervision industrial waste water discharge pipe dynamic corrosion to can realize the monitoring at industrial waste water discharge pipe different structure positions, and improve the monitoring precision and carry out the change of industrial waste water under the condition that does not close the transfer pump.
The utility model discloses a device of real-time supervision industrial waste water discharge pipe dynamic corrosion, deposit and update the system including the corruption medium, the electrochemistry workstation, the tested subassembly, the transfer pump, the master control valve, the flowmeter and connect the liquid outlet main and the liquid return main that the corruption medium deposited and update the system, the feed liquor end of transfer pump is connected with the liquid outlet main that the connection corruption medium deposited and update the system, the liquid outlet end of transfer pump passes through the pipe fitting and is connected with the inlet of tested subassembly, the liquid outlet of tested subassembly is connected with the liquid return main that the connection corruption medium deposited and update the system, master control valve and flowmeter are installed on the pipe fitting of connecting transfer pump liquid outlet end and tested subassembly inlet;
the corrosive medium storing and updating system consists of a first liquid storage tank, a second liquid storage tank, a first liquid outlet valve, a second liquid outlet valve, a first liquid return valve, a second liquid return valve, a first sampling valve, a second sampling valve and a pipe fitting for connection; the first liquid storage tank and the second liquid storage tank are respectively provided with a liquid outlet, a liquid inlet and a sampling port, a first liquid outlet valve and a second liquid outlet valve are respectively arranged on pipe fittings connected with the liquid outlet of the first liquid storage tank and the liquid outlet of the second liquid storage tank, a first liquid return valve and a second liquid return valve are respectively arranged on pipe fittings connected with the liquid inlet of the first liquid storage tank and the liquid inlet of the second liquid storage tank, the first sampling valve and the second sampling valve are respectively arranged on pipe fittings connected with the sampling port of the first liquid storage tank and the sampling port of the second liquid storage tank, the pipe fitting connected with the liquid outlet of the first liquid storage tank and the pipe fitting connected with the liquid outlet of the second liquid storage tank are both connected with the liquid outlet main pipe, and the pipe fitting connected with the liquid inlet of the first liquid storage tank and;
the tested assembly consists of a rectangular annular pipe and at least one set of electrode group arranged on the rectangular annular pipe, the rectangular annular pipe is formed by combining an upper pipe, a lower pipe, a left pipe, a right pipe and four L-shaped bent pipes forming corners, the lengths of the right pipe and the left pipe are smaller than those of the upper pipe and the lower pipe, and a liquid inlet and a liquid outlet are respectively arranged on the right pipe and the left pipe; the electrode group consists of a sample, an auxiliary electrode and a reference electrode, wherein the sample and the auxiliary electrode are arranged in such a way that the bottom surfaces of the sample and the auxiliary electrode are in the same arc surface with the inner wall of the tube at the installation position, and the reference electrode is arranged in such a way that the lower end of the reference electrode is positioned in the inner hole of the tube;
the number of the electrochemical work stations is the same as that of the electrode groups, and the sample, the auxiliary electrode and the reference electrode in each set of the electrode groups are respectively connected with the corresponding electrochemical work stations through leads.
In the device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time, the right pipe and the left pipe of the rectangular annular pipe are equal-diameter pipes, the upper pipe of the rectangular annular pipe is a variable-inner-diameter pipe, and the lower pipe of the rectangular annular pipe is an equal-inner-diameter pipe, or the upper pipe of the rectangular annular pipe is an equal-inner-diameter pipe and the lower pipe of the rectangular annular pipe is a variable-inner-diameter pipe, wherein the equal-inner-diameter pipes mean that the inner diameters of the whole pipes are the same, and the variable-inner-diameter pipes mean that the inner diameters of the pipes are at least two different; the number of the electrode groups is not more than three, and when one electrode group is used, the electrode group is arranged on an L-shaped bent pipe of the rectangular annular pipe, or on an upper side pipe of the rectangular annular pipe, or on a lower side pipe of the rectangular annular pipe; when the number of the electrode groups is two, the two electrode groups are respectively arranged on the L-shaped bent pipe and the upper side pipe of the rectangular annular pipe, or are respectively arranged on the L-shaped bent pipe and the lower side pipe of the rectangular annular pipe; when the number of the electrode groups is three, the three electrode groups are respectively arranged on the L-shaped bent pipe, the upper side pipe and the lower side pipe of the rectangular annular pipe.
In the device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time, when the electrode group is arranged on the L-shaped bent pipe, the sample is positioned at the vertex of the outer corner of the L-shaped bent pipe, the reference electrode is positioned at the vertex of the inner corner of the L-shaped bent pipe, and the auxiliary electrode is positioned at the section where the L-shaped bent pipe is connected with the upper side pipe or the lower side pipe and is positioned on the pipe wall of the same side as the sample; when the electrode group is arranged on the upper side tube or the lower side tube, the sample and the auxiliary electrode are arranged on the same side tube wall, the reference electrode is arranged on the tube wall which is axially symmetrical with the sample and the auxiliary electrode, and the center lines of the reference electrode and the sample pass through the same straight line; the distance b between the sample and the auxiliary electrode is 5.0-20.0 mm, and the distance a between the lower end part of the reference electrode and the bottom surface of the sample is 2-5 mm.
In the device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time, the L-shaped bent pipe or/and the upper pipe or/and the lower pipe which are provided with the electrode group in the rectangular annular pipe are made of polytetrafluoroethylene, and the left pipe, the right pipe, the L-shaped bent pipe, the upper pipe and the lower pipe which are not provided with the electrode group are made of organic glass.
In the device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time, the first liquid outlet valve, the second liquid outlet valve, the first liquid return valve and the second liquid return valve are electromagnetic valves, and the first sampling valve and the second sampling valve are manual valves.
In the above-mentioned device of real-time supervision industrial waste water discharge pipe dynamic corrosion, the internal diameter of rectangular ring pipe and play liquid house steward, return the liquid house steward, connect the transfer pump and go out the liquid end and the pipe fitting by the test assembly inlet, the pipe fitting of being connected with first reservoir liquid outlet and the pipe fitting of being connected with second reservoir liquid outlet, the internal diameter size of the pipe fitting of being connected with first reservoir liquid inlet and the pipe fitting of being connected with second reservoir liquid inlet should satisfy when the industrial waste water velocity of flow through intraductal is 0.1 ~ 2.2m/s, the reynolds number is between 4 ~ 100.
The utility model discloses following beneficial effect has:
1. because the device in by the test assembly by the rectangle ring form pipe and install one set at least electrode group on the rectangle ring form pipe and constitute, and the upper limit pipe of rectangle ring form pipe be for becoming internal diameter pipe, lower limit pipe for waiting internal diameter pipe, perhaps the upper limit pipe of rectangle ring form pipe be for waiting internal diameter pipe, lower limit pipe for becoming internal diameter pipe, therefore can monitor the not industrial waste water discharge pipe's of isostructure corrosion situation.
2. Because the electrode group consists of the sample, the auxiliary electrode and the reference electrode, the installation of the sample and the auxiliary electrode leads the bottom surface of the sample and the inner wall of the pipe at the installation position to be in the same cambered surface, thereby avoiding the influence of the industrial wastewater flow pattern on the test result and being beneficial to improving the monitoring precision.
3. Because the internal diameter size of pipe fitting in the device should satisfy through intraductal industrial waste water velocity of flow when 0.1 ~ 2.2m/s, the reynolds number is between 4 ~ 100, therefore industrial waste water under the low reynolds number is very little to the formation influence of electrode group electric current and voltage, is favorable to further improving monitoring accuracy.
4. Because the L-shaped bent pipe or/and the upper side pipe or/and the lower side pipe which is provided with the electrode group in the rectangular annular pipe is made of polytetrafluoroethylene, and the left side pipe, the right side pipe, the L-shaped bent pipe, the upper side pipe and the lower side pipe which are not provided with the electrode group are made of organic glass, current and voltage signals formed by the electrode group can be more stable during monitoring, and the condition in the pipe can be observed conveniently.
5. The structure of the corrosive medium storage and update system and the loop formed by connecting the corrosive medium storage and update system with the infusion pump, the control main valve and the tested assembly can replace industrial wastewater under the condition of not closing the infusion pump, and can keep the tube filled with liquid to reduce the influence of bubbles during sampling and sample replacement.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for monitoring dynamic corrosion of an industrial wastewater discharge pipe in real time according to the present invention;
FIG. 2 is a schematic structural diagram of a tested component in the device for monitoring dynamic corrosion of the industrial wastewater discharge pipe in real time according to the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged partial view of the L-bend of FIG. 2 with the electrode assembly installed;
FIG. 5 is an enlarged partial view of the varied inner diameter upper tube of FIG. 2 with the electrode assembly installed;
FIG. 6 is a schematic diagram showing the connection of the first liquid outlet valve, the second liquid outlet valve, the first liquid return valve and the second liquid return valve with the relay in the corrosive medium storing and renewing system.
In the figure, 1-sample, 2-auxiliary electrode, 3-reference electrode, 4-upper side tube, 5-lower side tube, 6-L-shaped bent tube, 7-flange, 8-liquid outlet of tested component, 9-liquid inlet of tested component, 10-left side tube, 11-right side tube, 12-liquid return main tube, 13-first liquid outlet valve, 14-second liquid outlet valve, 15-first liquid return valve, 16-second liquid return valve, 17-first sampling valve, 18-second sampling valve, 19-total control valve, 20-infusion pump, 21-electrochemical workstation, 22-flowmeter, 23-first liquid storage tank, 24-second liquid storage tank, 25-liquid outlet main tube.
Detailed Description
The structure and the application method of the device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to the present invention will be further described by the following embodiments with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example 1
In this embodiment, the apparatus for real-time monitoring dynamic corrosion of industrial wastewater discharge pipe is shown in fig. 1, and comprises a corrosion medium storing and renewing system, an electrochemical workstation 21, a tested component, an infusion pump 20, a master control valve 19, a flow meter 22, a liquid outlet manifold 25 and a liquid return manifold 12.
The corrosive medium storing and updating system is shown in fig. 1 and comprises a first liquid storage tank 23, a second liquid storage tank 24, a first liquid outlet valve 13, a second liquid outlet valve 14, a first liquid return valve 15, a second liquid return valve 16, a first sampling valve 17, a second sampling valve 18 and a pipe fitting for connection; the first liquid outlet valve 13, the second liquid outlet valve 14, the first liquid return valve 15 and the second liquid return valve 16 are electromagnetic valves controlled by relays (see fig. 6), and the first sampling valve 17 and the second sampling valve 18 are manual valves; first reservoir 23 and second reservoir 24 all are provided with the liquid outlet, inlet and sample connection, first liquid valve 13, the second goes out liquid valve 14 and installs respectively on the pipe fitting of being connected with first reservoir 23 liquid outlet, 24 liquid outlets of second reservoir, first liquid valve 15, second liquid valve 16 is returned and is installed respectively on the pipe fitting of being connected with first reservoir 23 liquid inlet, 24 liquid inlets of second reservoir, first sample valve 17, second sample valve 18 is installed respectively on the pipe fitting of being connected with first reservoir 23 sample connection, 24 sample connections of second reservoir.
As shown in fig. 2, 3, 4 and 5, the tested assembly comprises a rectangular annular tube and an electrode group mounted on the rectangular annular tube; the rectangular annular pipe is formed by combining an upper pipe 4, a lower pipe 5, a left pipe 10, a right pipe 11 and four L-shaped bent pipes 6 forming corners through a flange 7, a sealing ring and screws, wherein the right pipe 11 and the left pipe 10 are equal-diameter pipes, the lengths of the right pipe 11 and the left pipe 10 are smaller than those of the upper pipe 4 and the lower pipe 5, a liquid inlet 9 and a liquid outlet 8 are respectively arranged on the right pipe 11 and the left pipe 10, the upper pipe 4 is a variable-inner-diameter pipe, the inner diameter of the left section of the upper pipe is D1, the inner diameter of the right section of the upper pipe is D2(D2 is smaller than D1), and the lower pipe 5 is an equal-inner; the L-shaped bent pipe forming the left upper corner, the upper side pipe 4 and the lower side pipe 5 are made of polytetrafluoroethylene, and the left side pipe 10, the right side pipe 11 and the L-shaped bent pipes forming the left lower corner, the right upper corner and the right lower corner are made of organic glass; the electrode sets are three, each set of electrode set consists of a test sample 1, an auxiliary electrode 2 and a reference electrode 3, the test sample 1 is determined according to the material of the industrial wastewater discharge pipe, the auxiliary electrode 2 is made of metal platinum, the reference electrode 3 is a saturated calomel electrode, and the three sets of electrode sets are respectively arranged on an L-shaped bent pipe 6 forming the left upper corner of the rectangular annular pipe, and an upper pipe 5 and a lower pipe 5 at the left part of the upper pipe 4 with the inner diameter of D1; the electrode group is arranged on the L-shaped bent pipe 6, a sample 1 is positioned at the vertex of an outer corner of the L-shaped bent pipe, the bottom surface of the sample 1 is positioned in the same arc surface with the inner wall of the pipe at the installation position, a reference electrode 3 is positioned at the vertex of an inner corner of the L-shaped bent pipe, the lower end of the reference electrode is positioned in an inner hole of the pipe, an auxiliary electrode 2 is positioned at the joint section of the L-shaped bent pipe and the upper side pipe 4, the bottom surface of the auxiliary electrode is positioned in the same arc surface with the inner wall of the pipe at the installation position, the distance b between the sample 1 and the auxiliary electrode 2 is 10mm, and the distance a between; the electrode group is arranged on the left section of the upper pipe 4 with the inner diameter of D1, a sample 1 and the inner wall of the pipe at the installation position are in the same arc surface, an auxiliary electrode 2 and the sample 1 are positioned on the same side of the pipe wall, the bottom surface of the auxiliary electrode and the inner wall of the pipe at the installation position are in the same arc surface, a reference electrode 3 is positioned on the pipe wall which is axially symmetrical to the sample 1 and the auxiliary electrode 2, the lower end of the reference electrode is positioned in an inner hole of the pipe, the center lines of the reference electrode 3 and the sample 1 pass through the same straight line, the distance b between the sample 1 and the auxiliary electrode 2 is 10mm, and the distance a between the end part of; install the electrode group on lower limit pipe 5, its sample 1 is in same cambered surface with the inner wall of installation department pipe, and auxiliary electrode 2 is located same one side pipe wall and its bottom surface and the inner wall of installation department pipe in same cambered surface with sample 1, and reference electrode 3 is located and is located the hole of pipe with sample 1 and auxiliary electrode 2 be axisymmetric pipe wall and lower extreme, and reference electrode 3 crosses same straight line with the central line of sample 1, the interval b between sample 1 and the auxiliary electrode 2 is 10mm, and the interval a between 3 lower extreme tip of reference electrode and the sample 1 bottom surface is 5 mm.
The infusion pump 20 is a low pressure pump, the master control valve 19 is a manual valve, and the flow meter 22 is a rotameter.
The connection mode of the components or assemblies is as follows:
in the corrosive medium storing and updating system, a pipe connected with a liquid outlet of the first liquid storage tank 23 and a pipe connected with a liquid outlet of the second liquid storage tank 24 are both connected with the liquid outlet main pipe 25, and a pipe connected with a liquid inlet of the first liquid storage tank 23 and a pipe connected with a liquid inlet of the second liquid storage tank 24 are both connected with the liquid return main pipe 12; the liquid inlet end of transfer pump 20 is connected with the liquid outlet total pipe 25 that is connected the corrosive medium and deposits and update the system, and the liquid outlet end of transfer pump 20 passes through the pipe fitting and is connected by test element's inlet 9, and by test element's liquid outlet 8 with be connected corrosive medium and deposit and update the system return liquid total pipe 12 and be connected, total control valve 19 and flowmeter 22 install on connecting transfer pump liquid outlet end and the pipe fitting by test element inlet, the quantity of electrochemistry workstation 21 is the same with the set number of electrode group, and sample 1, auxiliary electrode 2 and reference electrode 3 in each set of electrode group are connected with corresponding electrochemistry workstation 21 through the wire respectively.
In order to monitor the dynamic corrosion of the industrial wastewater discharge pipe under the low reynolds number, in this embodiment, except that the inner diameter D2 of the right section of the upper edge pipe 4 of the rectangular annular pipe in the tested component is 30mm, and the inner diameter of the part of the L-shaped bent pipe connected with the right section of the upper edge pipe, which forms the right upper corner, is 30mm, the inner diameters of other parts of the rectangular annular pipe, the liquid outlet header pipe 25, the liquid return header pipe 12, the pipe connecting the liquid outlet end of the infusion pump and the liquid inlet of the tested component, the pipe connecting the liquid outlet of the first liquid storage tank 23, the pipe connecting the liquid outlet of the second liquid storage tank 24, the pipe connecting the liquid inlet of the first liquid storage tank 23, and the pipe connecting the liquid inlet of the second liquid storage tank 24.
Example 2
This example uses the apparatus described in example 1 to monitor dynamic corrosion of an industrial wastewater discharge pipe in real time at low reynolds numbers. The composition of the industrial wastewater is shown in Table 1, and the dynamic viscosity of the industrial wastewater is measured by an Ubbelohde viscometer and is 1.02 centipoises (25 ℃).
TABLE 1 composition of Industrial waste Water
The material of the sample in the electrode group is determined according to the material of the industrial wastewater discharge pipe, and the material of the sample is 304 stainless steel.
In this example, the flow rate of the industrial wastewater was controlled to 2.512X 10 by monitoring at 25 ℃-3m3The flow rate is 0.5m/s, and the Reynolds number for representing the flowing condition of the industrial wastewater is between 4 and 100 due to the dynamic viscosity of the industrial wastewater and the inner diameter of each pipe in the device in the embodiment 1, and belongs to a low Reynolds number.
In this embodiment, the monitoring operation is as follows:
(1) the second liquid outlet valve 14, the second liquid return valve 16, the second sampling valve 18, the first sampling valve 17, the master control valve 19 and the infusion pump 20 are in a closed state, the first liquid outlet valve 13 and the first liquid return valve 15 are in an open state, and fresh industrial wastewater is added into the first liquid storage tank 23;
(2) starting the infusion pump 20, enabling the industrial wastewater in the first liquid storage tank 23 to enter the infusion pump through a pipe connected with a liquid outlet of the first liquid storage tank and a liquid outlet header pipe 25, starting a master control valve 19 after the infusion pump 20 reaches working pressure, enabling the industrial wastewater to enter a rectangular annular pipe of a tested component through a pipe connected with a liquid outlet end of the infusion pump 20 and a liquid inlet 9 of the rectangular annular pipe of the tested component under the action of the infusion pump 20, then enabling the industrial wastewater to return to the first liquid storage tank through a liquid outlet 8 of the rectangular annular pipe, a liquid return header pipe 12 and a pipe connected with a liquid inlet of the first liquid storage tank 23, and starting three electrochemical work stations after the industrial wastewater fills the whole pipeline of the device and runs stably;
(3) when the voltage and the current displayed by the electrochemical workstation are stable, timing is started, and required data are measured;
(4) in the monitoring process, sampling is carried out through the first sampling valve 17, after the obtained industrial wastewater sample is analyzed, if the industrial wastewater needs to be replaced, fresh industrial wastewater is added into the second liquid storage tank 24, then the first liquid outlet valve 13 and the first liquid return valve 15 are closed, the second liquid outlet valve 14 and the second liquid return valve 16 are opened while the first liquid outlet valve 13 and the first liquid return valve 15 are closed, and the used industrial wastewater in the first liquid storage tank 23 is emptied;
(5) in the continuous monitoring process, sampling is carried out through the second sampling valve 18, after the obtained industrial wastewater sample is analyzed, if the industrial wastewater needs to be replaced, fresh industrial wastewater is added into the first liquid storage tank 23, then the second liquid outlet valve 14 and the second liquid return valve 16 are closed, the first liquid outlet valve 13 and the first liquid return valve 15 are opened while the second liquid outlet valve 14 and the second liquid return valve 16 are closed, and the used industrial wastewater in the second liquid storage tank 24 is emptied;
and (5) replacing the subsequent industrial wastewater in the monitoring process according to the steps (4) and (5).
In this example, electrochemical measurements were performed every 0.5 hour, and from the third time, the average of the three measurements was used as the final monitor value, and the measurement results are shown in table 2.
TABLE 2 electrochemical measurement results of the samples
Note: r1 is impedance, Rs is internal resistance of industrial wastewater, CPE is phase-angle bit element, n is corresponding CPE index
The operation of the apparatus was stopped by monitoring for 10 hours from the start of the timing, and a sample was taken out for the mass loss detection, and the detection results are shown in Table 3.
TABLE 3 test results of sample quality loss
From the electrochemical measurement results and the mass loss detection results, it can be seen that the samples installed at three positions on the rectangular ring pipe are severely corroded, but the corrosion of the sample positioned at the left section with the inner diameter D1 of the upper edge pipe of the rectangular ring pipe is more than the corrosion of the sample positioned on the L-shaped bent pipe forming the upper left corner of the rectangular ring pipe is more than the corrosion of the sample positioned at the lower edge pipe with the same inner diameter of the rectangular ring pipe, namely the industrial wastewater corrodes the pipeline with the changed inner diameter most seriously, the pipeline with the same inner diameter corrodes lightest, and the corrosion to the pipeline at the corner is between the two.
Claims (10)
1. The utility model provides a device of real-time supervision industrial waste water discharge pipe developments corruption, the device is deposited and the renewal system including the corruption medium, electrochemistry workstation (21), by the test subassembly, transfer pump (20), total control valve (19), flowmeter (22) and connect the corruption medium deposit with the liquid outlet main pipe (25) and the liquid return main pipe (12) of renewal system, the inlet end of transfer pump (20) is connected with the liquid outlet main pipe (25) of connecting the corruption medium and depositing with the renewal system, the liquid outlet end of transfer pump (20) is connected with the inlet of by the test subassembly through the pipe fitting, the liquid outlet of being tested the subassembly with be connected the liquid return main pipe (12) of corruption medium and depositing with the renewal system and be connected, total control valve (19) and flowmeter (22) are installed on the pipe fitting of transfer pump connection liquid outlet end and tested the subassembly inlet, its characterized in that:
the corrosive medium storing and updating system is composed of a first liquid storage tank (23), a second liquid storage tank (24), a first liquid outlet valve (13), a second liquid outlet valve (14), a first liquid return valve (15), a second liquid return valve (16), a first sampling valve (17), a second sampling valve (18) and a pipe fitting for connection; the first liquid storage tank (23) and the second liquid storage tank (24) are provided with liquid outlets, liquid inlets and sampling ports, a first liquid outlet valve (13) and a second liquid outlet valve (14) are respectively installed on pipe fittings connected with the liquid outlets of the first liquid storage tank (23) and the liquid outlet of the second liquid storage tank (24), a first liquid return valve (15) and a second liquid return valve (16) are respectively installed on pipe fittings connected with the liquid inlets of the first liquid storage tank (23) and the second liquid storage tank (24), a first sampling valve (17) and a second sampling valve (18) are respectively installed on pipe fittings connected with the sampling ports of the first liquid storage tank (23) and the sampling ports of the second liquid storage tank (24), pipe fittings connected with the liquid outlets of the first liquid storage tank (23) and pipe fittings connected with the liquid outlets of the second liquid storage tank (24) are respectively connected with the liquid outlet header pipe (25), pipe fittings connected with the liquid inlets of the first liquid storage tank (23) and pipe fittings connected with the liquid inlet of the second liquid storage tank (24) are respectively (ii) a
The tested assembly consists of a rectangular annular pipe and at least one set of electrode group arranged on the rectangular annular pipe, the rectangular annular pipe is formed by combining an upper side pipe (4), a lower side pipe (5), a left side pipe (10), a right side pipe (11) and four L-shaped bent pipes (6) forming corners, the lengths of the right side pipe (11) and the left side pipe (10) are smaller than those of the upper side pipe (4) and the lower side pipe (5), and a liquid inlet (9) and a liquid outlet (8) are respectively arranged on the right side pipe (11) and the left side pipe (10); the electrode group consists of a sample (1), an auxiliary electrode (2) and a reference electrode (3), wherein the sample (1) and the auxiliary electrode (2) are arranged in such a way that the bottom surfaces of the sample and the auxiliary electrode are positioned on the same cambered surface with the inner wall of the tube at the installation position, and the lower end of the reference electrode (3) is positioned in the inner hole of the tube;
the number of the electrochemical work stations (21) is the same as that of the electrode groups, and the sample (1), the auxiliary electrode (2) and the reference electrode (3) in each electrode group are respectively connected with the corresponding electrochemical work stations (21) through leads.
2. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to claim 1, wherein the right pipe (11) and the left pipe (10) of the rectangular annular pipe are equal-diameter pipes, the upper pipe (4) of the rectangular annular pipe is a variable-diameter pipe, the lower pipe (5) of the rectangular annular pipe is an equal-diameter pipe, or the upper pipe (4) of the rectangular annular pipe is an equal-diameter pipe, and the lower pipe (5) of the rectangular annular pipe is a variable-diameter pipe;
the number of the electrode groups is not more than three, and when one electrode group is used, the electrode group is arranged on an L-shaped bent pipe (6) of the rectangular annular pipe, or on an upper side pipe (4) of the rectangular annular pipe, or on a lower side pipe (5) of the rectangular annular pipe; when the number of the electrode groups is two, the two electrode groups are respectively arranged on the L-shaped bent pipe (6) of the rectangular annular pipe and the upper side pipe (4), or are respectively arranged on the L-shaped bent pipe (6) of the rectangular annular pipe and the lower side pipe (5); when the number of the electrode groups is three, the three electrode groups are respectively arranged on the L-shaped bent pipe (6), the upper side pipe (4) and the lower side pipe (5) of the rectangular annular pipe.
3. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to the claim 2 is characterized in that when the electrode group is installed on the L-shaped bent pipe (6), the sample (1) is positioned at the vertex of the outer corner of the L-shaped bent pipe, the reference electrode (3) is positioned at the vertex of the inner corner of the L-shaped bent pipe, and the auxiliary electrode (2) is positioned at the section of the L-shaped bent pipe connected with the upper side pipe (4) or the lower side pipe (5) and is positioned on the same side pipe wall as the sample (1);
when the electrode group is arranged on the upper side tube (4) or the lower side tube (5), the sample (1) and the auxiliary electrode (2) are arranged on the same side tube wall, the reference electrode (3) is arranged on the tube wall which is axially symmetrical with the sample (1) and the auxiliary electrode (2), and the central lines of the reference electrode (3) and the sample (1) pass through the same straight line;
the distance (b) between the sample (1) and the auxiliary electrode (2) is 5.0-20.0 mm, and the distance (a) between the lower end of the reference electrode (3) and the bottom surface of the sample (1) is 2-5 mm.
4. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to any one of claims 1 to 3, characterized in that the L-shaped bent pipe (6) or/and the upper pipe (4) or/and the lower pipe (5) provided with the electrode group in the rectangular annular pipe are made of polytetrafluoroethylene, and the left pipe (10), the right pipe (11), the L-shaped bent pipe (6), the upper pipe (4) and the lower pipe (5) which are not provided with the electrode group are made of organic glass.
5. Device for real-time monitoring of dynamic corrosion of industrial wastewater discharge pipes according to any of claims 1 to 3, characterized in that the first tapping valve (13), the second tapping valve (14), the first liquid return valve (15) and the second liquid return valve (16) are solenoid valves and the first sampling valve (17) and the second sampling valve (18) are manual valves.
6. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to claim 4, wherein the first liquid outlet valve (13), the second liquid outlet valve (14), the first liquid return valve (15) and the second liquid return valve (16) are electromagnetic valves, and the first sampling valve (17) and the second sampling valve (18) are manual valves.
7. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time according to any one of claims 1 to 3, wherein the inner diameter of the rectangular annular pipe, the liquid outlet header pipe (25), the liquid return header pipe (12), the pipe connecting the liquid outlet end of the infusion pump with the liquid inlet of the tested component, the pipe connecting the liquid outlet of the first liquid storage tank (23) and the pipe connecting the liquid outlet of the second liquid storage tank (24), and the inner diameter of the pipe connecting the liquid inlet of the first liquid storage tank (23) and the pipe connecting the liquid inlet of the second liquid storage tank (24) are such that the Reynolds number is between 4 and 100 when the flow rate of the industrial wastewater passing through the pipe is between 0.1 and 2.2 m/s.
8. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time as claimed in claim 4, wherein the inside diameter of the rectangular annular pipe, the liquid outlet header pipe (25), the liquid return header pipe (12), the pipe fitting connecting the liquid outlet end of the infusion pump with the liquid inlet of the tested component, the pipe fitting connected with the liquid outlet of the first liquid storage tank (23), and the pipe fitting connected with the liquid outlet of the second liquid storage tank (24), wherein the inside diameter of the pipe fitting connected with the liquid inlet of the first liquid storage tank (23) and the inside diameter of the pipe fitting connected with the liquid inlet of the second liquid storage tank (24) are such that the Reynolds number is 4-100 when the flow rate of the industrial wastewater passing through the pipe is 0.1-2..
9. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time as claimed in claim 5, wherein the inside diameter of the rectangular annular pipe, the liquid outlet header pipe (25), the liquid return header pipe (12), the pipe fitting connecting the liquid outlet end of the infusion pump with the liquid inlet of the tested component, the pipe fitting connected with the liquid outlet of the first liquid storage tank (23), and the pipe fitting connected with the liquid outlet of the second liquid storage tank (24), wherein the inside diameter of the pipe fitting connected with the liquid inlet of the first liquid storage tank (23) and the inside diameter of the pipe fitting connected with the liquid inlet of the second liquid storage tank (24) are such that the Reynolds number is 4-100 when the flow rate of the industrial wastewater passing through the pipe is 0.1-2..
10. The device for monitoring the dynamic corrosion of the industrial wastewater discharge pipe in real time as claimed in claim 6, wherein the inner diameter of the rectangular annular pipe, the liquid outlet header pipe (25), the liquid return header pipe (12), the pipe fitting connecting the liquid outlet end of the infusion pump with the liquid inlet of the tested component, the pipe fitting connected with the liquid outlet of the first liquid storage tank (23), and the pipe fitting connected with the liquid outlet of the second liquid storage tank (24), wherein the inner diameter of the pipe fitting connected with the liquid inlet of the first liquid storage tank (23) and the inner diameter of the pipe fitting connected with the liquid inlet of the second liquid storage tank (24) are such that the Reynolds number is 4-100 when the flow rate of the industrial wastewater passing through the pipe is 0.1-2..
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921041620.4U CN210465228U (en) | 2019-07-05 | 2019-07-05 | Device for monitoring dynamic corrosion of industrial wastewater discharge pipe in real time |
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| CN201921041620.4U CN210465228U (en) | 2019-07-05 | 2019-07-05 | Device for monitoring dynamic corrosion of industrial wastewater discharge pipe in real time |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146438A (en) * | 2019-07-05 | 2019-08-20 | 宁夏大学 | A kind of device of real-time monitoring industrial wastewater discharge pipe Dynamic Corrosion |
| CN114062178A (en) * | 2021-12-17 | 2022-02-18 | 宁夏大学 | Evaluation equipment for dynamic erosion corrosion of mine water to horizontal heat exchange tube of evaporator and use method |
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2019
- 2019-07-05 CN CN201921041620.4U patent/CN210465228U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146438A (en) * | 2019-07-05 | 2019-08-20 | 宁夏大学 | A kind of device of real-time monitoring industrial wastewater discharge pipe Dynamic Corrosion |
| CN110146438B (en) * | 2019-07-05 | 2024-06-25 | 宁夏大学 | Device for monitoring dynamic corrosion of industrial wastewater discharge pipe in real time |
| CN114062178A (en) * | 2021-12-17 | 2022-02-18 | 宁夏大学 | Evaluation equipment for dynamic erosion corrosion of mine water to horizontal heat exchange tube of evaporator and use method |
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