CN117990297A - Online leakage detection device and method for industrial furnace water cooling jacket - Google Patents
Online leakage detection device and method for industrial furnace water cooling jacket Download PDFInfo
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- 230000000630 rising effect Effects 0.000 claims description 3
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 238000003723 Smelting Methods 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of industrial furnace safety control, and in particular discloses an online leakage detection method for an industrial furnace water cooling jacket, which comprises the following steps of: s1, confirming whether a leakage point exists or not; if a leakage point exists, entering S2, otherwise entering S4; s2, confirming the position of the first leakage point, and then entering S3; s3, confirming the position of the leakage point for the second time, and then entering S4; s4, ending the leak detection operation. The online leakage detection method of the invention realizes the elimination of water leakage of the industrial furnace water cooling jacket under the condition of no furnace shutdown. The invention also discloses an online leakage detection device for the industrial furnace water cooling jacket.
Description
Technical Field
The invention relates to the technical field of industrial furnace safety control, in particular to an online leakage detection device and method for an industrial furnace water cooling jacket.
Background
The method is characterized in that an original water-cooling water jacket backwater manifold of an industrial furnace (such as a side-blown furnace, a smelting furnace and the like, which refers to a furnace kiln with longer furnace shutdown treatment time and larger difficulty) belongs to open-circuit circulation, and on the basis of configuring a water inlet flow and pressure monitoring alarm device on a water-cooling water jacket water inlet manifold, an adherence thermocouple temperature detection is also arranged on each water-cooling water jacket water outlet branch pipe and used for monitoring the water leakage condition of the water-cooling water jacket water manifold. The water-cooling water jacket header pipe comprises a water jacket which is in direct contact with the hearth of the industrial furnace, such as a furnace top water-cooling beam, a blanking port, a smoke outlet, a skirt cover water jacket and the like; if water leakage occurs in the water-cooling water jacket of the industrial furnace in the production operation process, the process parameters such as water supplementing amount of cooling water, process flue gas temperature, dry humidity of ash, cooling water discharge amount of flue gas purification washing and the like can be compared and analyzed, and comprehensive research and judgment on water leakage caused by steam and water leakage between water jacket seams of the furnace body can be performed.
The water leakage of the water cooling water jacket of the industrial furnace needs to be eliminated as soon as possible in the early stage, firstly, the water leakage point is corroded by corrosive gases such as high temperature, SO 2 and the like, the water leakage point is gradually increased, a large amount of cooling water directly enters the industrial furnace body after the water leakage point is increased, and the cooling water can explode when encountering high-temperature solution in the industrial furnace body, SO that safety accidents are caused.
Secondly, in order to ensure the performance of the furnace lining, the heating time of the furnace opening generally needs about 3 days; the cooling time of the furnace is generally about 3 days, and then the staff can check the furnace; the water leakage time of the water cooling water jacket is generally 7-9 days. Thus, the operation of starting and stopping the furnace and removing the water leakage of the water cooling water jacket takes a lot of time, which has great influence on the continuous production of the industrial furnace. Therefore, how to realize online leakage detection of the water-cooling water jacket under the condition of no furnace shutdown is an urgent problem to be solved at present.
Disclosure of Invention
In order to solve the technical problems of starting and stopping the furnace and taking a great deal of time to eliminate the water leakage operation of the water cooling water jacket and seriously reducing the production efficiency of the industrial furnace, the invention provides an on-line leakage detection device and method for the water cooling water jacket of the industrial furnace, which are used for implementing the water leakage detection under the condition of lower furnace temperature of the industrial furnace and reducing the safety risk (such as the heating and vaporization of cooling water in the water cooling water jacket, etc.) brought to the detection process by the heat conduction of the water cooling water jacket; and secondly, the leakage detection of each step is further implemented through the on-off matching of each part, so that the water leakage of the water cooling water jacket, the first pipeline, the second pipeline and the third valve is determined, the subsequent corresponding switching of the compressed air cooling mode of the water cooling water jacket is facilitated, and the maintenance operation is also facilitated.
The invention provides an online leakage detection device for a water cooling jacket of an industrial furnace, wherein a first water gap of the water cooling jacket is communicated with a first pipeline, a first valve is arranged on the first pipeline, the first pipeline is also communicated with a closed water tank, a first pressure gauge is arranged on the closed water tank, the online leakage detection device further comprises a first bypass pipeline and a second bypass pipeline, the second water gap of the water cooling jacket is communicated with the first bypass pipeline through the second pipeline, one end of the first bypass pipeline, which is far away from the water cooling jacket, is positioned above a backwater open water tank, a third valve is arranged on the first bypass pipeline, the second bypass pipeline is communicated with the first bypass pipeline and is positioned at the upstream of the third valve, and a second pressure gauge and the second valve are sequentially arranged on the second bypass pipeline. The first bypass pipeline, the second pressure gauge, the second valve and the third valve are installed at the second water gap of the water cooling jacket in a matched mode.
Further, the online leak detection device further comprises a blind plate, a first flange plate is arranged on the first pipeline, a second flange plate is arranged on the first valve, the first flange plate is fixedly connected with the second flange plate through a first bolt, and the blind plate is arranged between the first flange plate and the second flange plate. The blind plate is clamped between the first flange plate and the second flange plate, and then the first flange plate and the second flange plate are connected through first bolts in a threaded mode, so that the blind plate is fixed between the first flange plate and the second flange plate.
Further, the online leak detection device further comprises a third bypass pipeline, and the third bypass pipeline is communicated with the first pipeline. The third bypass duct enables communication of the first duct with external compressed gas.
Further, the online leak detection device further comprises a fourth bypass pipeline, the fourth bypass pipeline is a rubber pipe, and the rubber pipe is communicated with the second bypass pipeline. The rubber tube can realize the communication between the second bypass pipeline and external compressed gas.
The invention also provides an online leakage detection method for the industrial furnace water cooling jacket, which uses the online leakage detection device to perform online leakage detection on the industrial furnace water cooling jacket and comprises the following steps: s1, confirming whether a leakage point exists or not; if a leakage point exists, entering S2, otherwise entering S4; s2, confirming the position of the first leakage point, and then entering S3; s3, confirming the position of the leakage point for the second time, and then entering S4; s4, ending the leak detection operation.
Further, the step S1 includes: s11, closing the first valve, the second valve and the third valve; s12, observing the numerical value displayed by the first pressure gauge and the numerical value displayed by the second pressure gauge, and comparing the numerical value displayed by the first pressure gauge with the numerical value displayed by the second pressure gauge; s13, judging the numerical value, and if the numerical value displayed by the second pressure gauge is smaller than the numerical value displayed by the first pressure gauge, entering S2; if the value displayed by the second pressure gauge is greater than the value displayed by the first pressure gauge, the process goes to S4.
Further, the step S2 includes: s21, opening the first valve and the third valve and keeping the second valve closed, and enabling cooling water of the closed water tank to sequentially pass through the first pipeline, the water cooling water jacket, the second pipeline and the first bypass pipeline and then reach the backwater open water tank; s22, opening the second valve, closing the first valve and the third valve again, and enabling external compressed gas to pass through the fourth bypass pipeline, the second bypass pipeline, the first bypass pipeline, the second pipeline and the water cooling water jacket to the first pipeline in sequence; s23, manually checking whether the first pipeline, the second pipeline and the third valve have leakage conditions of external compressed gas, if the first pipeline or/and the second pipeline or/and the third valve have leakage conditions, closing the second valve to carry out maintenance operation, and then entering S3; if the first pipeline, the second pipeline and the third valve all operate normally, S3 is also entered.
Further, the S23 includes: s231, if the first pipeline or/and the second pipeline is/are confirmed to have leakage conditions manually, manually clamping the leakage points of the first pipeline or/and the leakage points of the second pipeline, and then entering S3; s232, if the third valve is confirmed to have leakage, replacing the third valve manually, and then entering S3.
Further, the step S3 includes: s31, opening the first valve and the third valve and closing the second valve, and enabling cooling water of the closed water tank to sequentially pass through the first pipeline, the water cooling water jacket, the second pipeline and the first bypass pipeline and then reach the backwater open water tank; s32, setting a blind plate between the first flange plate and the second flange plate, opening the second valve, closing the first valve and the third valve again, and enabling an external water source to sequentially pass through the fourth bypass pipeline, the second bypass pipeline, the first bypass pipeline, the second pipeline, the water cooling water jacket and the blind plate from the first pipeline to the first valve; s33, observing whether the value displayed by the second pressure gauge has obvious rising conditions, if the value displayed by the second pressure gauge does not rise, the water-cooling water jacket is close to the inner side wall of the industrial furnace and has leakage points, and entering S4; if the value displayed by the second pressure gauge is obviously increased, no leakage point exists on the inner side wall of the water cooling water jacket close to the industrial furnace, and S4 is also entered.
Further, S5: opening the second valve, closing the first valve and the third valve, and enabling external compressed gas to sequentially pass through the second bypass pipeline, the first bypass pipeline and the second pipeline to the water cooling jacket; or opening the first valve and the second valve and closing the third valve, wherein one part of external compressed gas sequentially passes through the third bypass pipeline and the first pipeline to the water cooling water jacket, and the other part of external compressed gas sequentially passes through the fourth bypass pipeline, the second bypass pipeline, the first bypass pipeline and the second pipeline to the water cooling water jacket.
Compared with the prior art, the invention has the following technical effects:
1. The online leak detection device has a simple structure, can be installed after being prefabricated in advance, and is rapid in installation process.
2. The online leak detection method of the invention is that an open water-cooling water jacket is simulated into a closed state, a first bypass pipeline, a second bypass pipeline and a second pressure gauge are additionally arranged by utilizing the principle that the expansion of a cooling water closed heated volume in the water-cooling water jacket will cause pressure change, and the numerical change of the second pressure gauge is used as the basis for judging the water leakage of the water-cooling water jacket; meanwhile, a second valve and a third valve are additionally arranged, and the second valve is used as an inlet for switching compressed gas outside the water cooling water jacket and an external water source interface for on-line detection.
The invention realizes the purpose of removing the water leakage of the water cooling jacket of the industrial furnace under the condition of no furnace shutdown, firstly, the water leakage detection is implemented under the condition of lower furnace temperature of the industrial furnace (in the slag discharging period of the industrial furnace), and the safety risk brought to the detection process by the heat conduction of the water cooling jacket (such as the heating and vaporization of cooling water in the water cooling jacket and the like) is reduced; and secondly, the leakage detection of each step is further implemented through the on-off matching of each part, so that the water leakage of the water cooling water jacket, the first pipeline, the second pipeline and the third valve is determined, the subsequent corresponding switching of the compressed air cooling mode of the water cooling water jacket is facilitated, and the maintenance operation is also facilitated.
Drawings
FIG. 1 is a schematic diagram of an on-line leak detection device for an industrial furnace water cooling jacket;
FIG. 2 is a schematic diagram II of an on-line leak detection method for an industrial furnace water cooling jacket;
the reference numerals in the drawings are:
1. A water-cooling water jacket; 11. an inner sidewall; 12. a first pipe; 13. a second pipe; 2. a first valve; 3. a closed water tank; 4. a first pressure gauge; 5. a first bypass conduit; 6. a second bypass conduit; 7. a second pressure gauge; 8. a second valve; 9. and a third valve.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1, the on-line leakage detection device for the water cooling jacket of the industrial furnace is characterized in that a first water gap (water inlet) of the water cooling jacket 1 is communicated with a first pipeline 12, a first valve 2 is arranged on the first pipeline 12, the first pipeline 12 is communicated with a closed water tank 3, a first pressure gauge 4 is arranged on the closed water tank 3, the on-line leakage detection device further comprises a first bypass pipeline 5, a second bypass pipeline 6, a second pressure gauge 7, a second valve 8 and a third valve 9, a second water gap (water outlet) of the water cooling jacket 1 is communicated with the first bypass pipeline 5 through a second pipeline 13, one end, far away from the water cooling jacket 1, of the first bypass pipeline 5 is located above a backwater open water tank, the third valve 9 is arranged on the first bypass pipeline 5, the second bypass pipeline 6 is communicated with the first bypass pipeline 5 and is located upstream of the third valve 9, and the second pressure gauge 7 and the second valve 8 are sequentially arranged on the second bypass pipeline 6. In specific application, the online leak detection device of the embodiment is arranged on one water cooling jacket 1 of the industrial furnace; if leakage detection is required for a plurality of water-cooling water jackets 1, the online leakage detection device of the embodiment needs to be installed on each water-cooling water jacket 1. Normally, the second pipe 13 is disposed above the backwater open tank, so that only the second pipe 13 (the backwater pipe) needs to be cut off when the on-line leak detection apparatus is installed. The first bypass pipeline 5 and the second bypass pipeline 6 are welded to a notch formed by cutting the second pipeline 13 on site, and the second pressure gauge 7, the second valve 8 and the third valve 9 are matched and installed, so that the installation of the online leak detection device is completed, wherein the first bypass pipeline 5 and the second bypass pipeline 6 can be integrally formed. The structure and opening and closing manners of the first valve 2, the second valve 8 and the third valve 9 are in the prior art, and will not be described in any more detail herein.
The online leak detection device of the embodiment has a simple structure, can be installed after being prefabricated in advance, and is rapid in installation process. The problem of water leakage of the industrial furnace water cooling jacket 1 can be solved under the condition of no furnace shutdown, firstly, water leakage detection (leakage detection) is implemented under the condition of low furnace temperature of the industrial furnace (in the slag discharging period of the industrial furnace), and the safety risk (such as heating vaporization of cooling water in the water cooling jacket 1 and the like) brought by heat conduction of the water cooling jacket 1 to the detection process is reduced; secondly, the leak detection is realized through the on-off matching of all parts, and the determination of which part of the water cooling water jacket 1, the first pipeline 12, the second pipeline 13 and the third valve 9 is in particular leaked is realized, so that corresponding maintenance operation can be carried out later.
As an implementation manner, the online leak detection device further comprises a blind plate, a first flange is arranged on the first pipeline 12, a second flange is arranged on the first valve 2, the first flange and the second flange are fixedly connected through a first bolt, and the blind plate is arranged between the first flange and the second flange. The blind plate is clamped between the first flange plate and the second flange plate, and then the first flange plate and the second flange plate are connected through first bolts in a threaded mode, so that the blind plate is fixed between the first flange plate and the second flange plate.
The blind plate is arranged to avoid the safety risk caused by the lack of cooling water in the water-cooling water jacket 1 when an external water source of an external water tank is adopted. Meanwhile, when the second valve 8 is opened and the first valve 2 and the third valve 9 are closed, the external water source sequentially passes through the second bypass pipeline 6, the first bypass pipeline 5, the second pipeline 13, the water cooling water jacket 1 and the first pipeline 12 to the blind plate of the first valve 2, and the external water source is equivalent to entering the closed pipeline for subsequent leak detection.
As an embodiment, the online leak detection device further includes a third bypass pipe (not shown in the figure), which is in communication with the first pipe 12; when the first conduit 12 is in communication with the third bypass conduit, the first valve 2 is located at the junction of the first conduit 12 and the third bypass conduit. The third bypass duct communicates with the machine for generating compressed gas, facilitating the passage of external compressed gas to the first duct 12.
As an embodiment, the online leak detection device further comprises a fourth bypass pipe (not shown in the figure), which is a rubber pipe, the rubber pipe being in communication with the second bypass pipe 6, and the rubber pipe being in communication with a machine or an external water tank that generates compressed gas; when the second bypass duct 6 is in communication with a fourth bypass duct (i.e. a hose), the second valve 8 is located at the junction of the second bypass duct 6 and the fourth bypass duct. The hose communicates with the machine or external water tank which generates the compressed gas, facilitating the passage of external compressed gas or external water source to the second bypass conduit 6.
As shown in fig. 2, an online leakage detection method for an industrial furnace water cooling jacket, which uses the online leakage detection device described in any one of the above to perform online leakage detection on the industrial furnace water cooling jacket, comprises the following steps:
S1, confirming whether a leakage point exists or not, wherein the method specifically comprises the following steps of:
s11, after the first pipeline 12 is communicated with the closed water tank 3, the first valve 2, the second valve 8 and the third valve 9 are closed;
s12, observing the numerical value displayed by the first pressure gauge 4 and the numerical value displayed by the second pressure gauge 7, and comparing the numerical value displayed by the first pressure gauge 4 with the numerical value displayed by the second pressure gauge 7;
S13, judging the value, if the value displayed by the second pressure gauge 7 is smaller than the value displayed by the first pressure gauge 4, a leakage point exists, and entering S2; if the value displayed by the second pressure gauge 7 is larger than the value displayed by the first pressure gauge 4, entering S4;
S2, confirming the position of the first leakage point, which specifically comprises the following steps:
S21, opening the first valve 2 and the third valve 9 and keeping the second valve 8 closed, and enabling cooling water of the closed water tank 3 to sequentially pass through the first pipeline 12, the water cooling water jacket 1, the second pipeline 13 and the first bypass pipeline 5 and then to reach a backwater open water tank;
S22, as the second bypass pipeline 6 is filled with external compressed gas (the fourth bypass pipeline is communicated with a machine for generating compressed gas, so that the external compressed gas is filled into the second bypass pipeline 6), the second valve 8 is opened, the first valve 2 and the third valve 9 are closed again, and the external compressed gas sequentially passes through the fourth bypass pipeline (namely a rubber pipe), the second bypass pipeline 6, the first bypass pipeline 5, the second pipeline 13, the water-cooling water jacket 1, the first pipeline 12 and the first valve 2;
S23, manually checking whether the first pipeline 12, the second pipeline 13 and the third valve 9 have leakage conditions of external compressed gas, if the first pipeline 12 or/and the second pipeline 13 or/and the third valve 9 have leakage conditions, closing the second valve 8 to carry out maintenance operation, and then entering S3; if the first pipe 12, the second pipe 13 and the third valve 9 all operate normally, S3 is entered;
S3, confirming the position of the second leakage point, which specifically comprises the following steps:
S31, opening the first valve 2 and the third valve 9, closing the second valve 8, and enabling cooling water of the closed water tank 3 to sequentially pass through the first pipeline 12, the water cooling water jacket 1, the second pipeline 13 and the first bypass pipeline 5 and then to reach a backwater open water tank;
s32, a blind plate is arranged between the first flange plate and the second flange plate, at the moment, an external water source is introduced into the second bypass pipeline 6 (the fourth bypass pipeline is communicated with an external water tank, the second bypass pipeline 6 is communicated with the external water source), the second valve 8 is opened, the first valve 2 and the third valve 9 are closed again, and the external water source sequentially passes through the blind plate of the fourth bypass pipeline (namely a rubber pipe), the second bypass pipeline 6, the first bypass pipeline 5, the second pipeline 13, the water cooling jacket 1 and the first pipeline 12 to the first valve 2;
S33, observing whether the value displayed by the second pressure gauge 7 has obvious rising conditions, if the value displayed by the second pressure gauge 7 does not rise, the water cooling water jacket 1 has leakage points close to the inner side wall 11 of the industrial furnace, and entering S4; if the value displayed by the second pressure gauge 7 is obviously increased, the water cooling water jacket 1 is close to the inner side wall 11 of the industrial furnace, no leakage point exists, and S4 is also entered; s4, ending the leak detection operation.
The leak detection process of this embodiment: the leakage detection is carried out on one water-cooling water jacket 1 of the industrial furnace by utilizing the lower furnace temperature in the slag discharge period (the slag discharge period refers to the period that the natural gas concentration is reduced by 25 percent, the oxygen concentration is reduced by 40 percent and the coal stopping and feeding are stopped) of the industrial furnace. Firstly, whether leakage points exist or not is confirmed, after the first pipeline 12 is communicated with the closed water tank 3, the first valve 2, the second valve 8 and the third valve 9 are closed, and at the moment, a closed pipeline is formed, which becomes a basis for judging whether water leakage exists in the water-cooling water jacket 1 (the water-cooling water jacket 1 is close to the inner side wall 11 of the furnace body and is positioned in the furnace body shell, and workers cannot directly observe the water-cooling water jacket by naked eyes) and whether water leakage exists in the first pipeline 12, the second pipeline 13 and the third valve 9 or not. The closed pipeline can cause the second pressure gauge 7 to rise under the effect of heat radiation (high-temperature radiation expansion) of a furnace body hearth, and the first pressure gauge 4 is connected to the closed water tank 3, so that the value displayed by the first pressure gauge 4 is the pressure value in the closed water tank 3; the values displayed by the first pressure gauge 4 are compared with the values displayed by the second pressure gauge 7. If the value displayed by the second pressure gauge 7 is greater than the value displayed by the first pressure gauge 4, it indicates that there is no leakage point, that is, the water-cooling water jacket 1 and the first pipe 12, the second pipe 13 and the third valve 9 are all in normal operation states, and the leakage detection operation can be directly ended (S4). If the value displayed by the second pressure gauge 7 is smaller than the value displayed by the first pressure gauge 4, it indicates that a leakage point exists, that is, a leakage point exists in at least one of the water-cooling water jacket 1 and the first pipe 12, the second pipe 13, and the third valve 9, and then the next detection step is performed (S2).
When the next detection step (S2) is carried out, the first valve 2 and the third valve 9 are firstly opened, the second valve 8 is closed, and the cooling water of the closed water tank 3 sequentially passes through the first pipeline 12, the water-cooling water jacket 1, the second pipeline 13 and the first bypass pipeline 5 and then reaches the backwater open water tank so as to recover the circulation of the cooling water of the water-cooling water jacket 1, so that the water-shortage vaporization of the water-cooling water jacket 1 is avoided. Then, the second bypass pipeline 6 is filled with external compressed gas, the second valve 8 is opened, the first valve 2 and the third valve 9 are closed again, and the external compressed gas sequentially passes through the rubber pipe, the second bypass pipeline 6, the first bypass pipeline 5, the second pipeline 13, the water cooling water jacket 1 and the first pipeline 12 to the first valve 2 to form a closed pipeline again, so that the switching of the cooling of the reverse compressed air is completed. Because the first pipeline 12 and the second pipeline 13 are positioned outside the furnace body, and one end of the first bypass pipeline 5 far away from the water-cooling water jacket 1 is positioned above the backwater open water tank, and the third valve 9 is arranged at one end of the first bypass pipeline 5 in the later stage, namely, the third valve 9 is positioned above the backwater open water tank, a worker can directly observe whether compressed gas, cooling water or a mixture of the compressed gas and the cooling water leaks on the first pipeline 12, the second pipeline 13 and the third valve 9 by naked eyes. If the first pipe 12, the second pipe 13 and the third valve 9 are all operating normally, the next detection step is directly entered (S3). If there is leakage in the first pipe 12 or/and the second pipe 13 or/and the third valve 9, after the second valve 8 is closed, maintenance is performed, and then the next detection step is performed (S3).
When the next detection step (S3) is performed, first, the first valve 2 and the third valve 9 are opened, and the second valve 8 is closed, and the cooling water of the closed water tank 3 sequentially passes through the first pipeline 12, the water-cooling water jacket 1, the second pipeline 13 and the first bypass pipeline 5 and then reaches the backwater open water tank, so as to restore the circulation of the cooling water of the water-cooling water jacket 1, which is to avoid the water shortage vaporization of the water-cooling water jacket 1. A blind plate is arranged between the first flange plate and the second flange plate, an external water source is introduced into the second bypass pipeline 6 through a fourth bypass pipeline (namely a rubber pipe), the second valve 8 is opened, the first valve 2 and the third valve 9 are closed again, and the external water source sequentially passes through the rubber pipe, the second bypass pipeline 6, the first bypass pipeline 5, the second pipeline 13, the water cooling water jacket 1 and the blind plate of the first pipeline 12 to the first valve 2. Firstly, because the time for loading and unloading the blind plate is longer, after the water cooling water jacket 1 is in lack of water and is gasified, water in the water cooling water jacket 1 can be outwards splashed at high temperature and the potential safety hazard exists in site operation, so that an external water source (standby water source) is introduced into the second bypass pipeline 6 through a fourth bypass pipeline (namely a rubber pipe), and the external water source is used for reversely supplying water to reduce the temperature of cooling water in the water cooling water jacket 1, thereby better eliminating the potential safety hazard.
After the second valve 8 is opened, the first valve 2 and the third valve 9 are closed, a closed pipeline is formed again, whether the numerical value displayed by the second pressure gauge 7 is obviously increased or not is observed, if the numerical value displayed by the second pressure gauge 7 is obviously increased, the water cooling water jacket 1 is close to the inner side wall 11 of the industrial furnace, no leakage point exists, and the leakage detection operation is directly finished (S4). If the value displayed by the second pressure gauge 7 does not rise obviously, the water cooling water jacket 1 is close to the inner side wall 11 of the industrial furnace, and the leakage detection operation is finished (S4).
The online leak detection method of the embodiment is that an open water-cooling water jacket 1 is simulated into a closed state, a first bypass pipeline 5, a second bypass pipeline 6 and a second pressure gauge 7 are additionally arranged by utilizing the principle that the expansion of a cooling water closed heated volume in the water-cooling water jacket 1 will cause pressure change, and the numerical change of the second pressure gauge 7 is used as a basis for judging the water leakage of the water-cooling water jacket 1; meanwhile, a second valve 8 and a third valve 9 are additionally arranged, and the second valve 8 is used as an inlet for switching compressed gas outside the water-cooling water jacket 1 and an external water source interface for on-line detection, so that the safety and feasibility of the operation of the water-cooling water jacket are ensured.
The invention can realize the elimination of the water leakage of the industrial furnace water cooling jacket 1 under the condition of no furnace shutdown, firstly, the leakage detection is implemented under the condition of lower temperature of the industrial furnace (the slag discharging period of the industrial furnace), and the safety risk (such as the heating vaporization of cooling water in the water cooling jacket 1, etc.) brought by the heat conduction of the water cooling jacket 1 to the detection process is reduced; secondly, through the on-off matching of each part, the leak detection of each step is further implemented, and the purpose of determining which part of the water cooling water jacket 1, the first pipeline 12, the second pipeline 13 and the third valve 9 is in particular leaked is achieved, so that the subsequent corresponding switching of the compressed air cooling mode of the water cooling water jacket 1 is facilitated, and the maintenance operation is also facilitated.
As an embodiment, S5: since the fourth bypass pipe is introduced with external compressed gas (i.e., the second bypass pipe 6 is introduced with external compressed gas), the second valve 8 is opened and the first valve 2 and the third valve 9 are closed, and the external compressed gas sequentially passes through the fourth bypass pipe, the second bypass pipe 6, the first bypass pipe 5, the second pipe 13 and the water-cooling water jacket 1;
or the third bypass pipeline and the fourth bypass pipeline are both filled with external compressed gas (namely, the first pipeline 12 is filled with external compressed gas, the second bypass pipeline 6 is filled with external compressed gas), the first valve 2 and the second valve 8 are opened, the third valve 9 is closed, one part of external compressed gas sequentially passes through the third bypass pipeline, the first pipeline 12 and the water-cooling water jacket 1, and the other part of external compressed gas sequentially passes through the fourth bypass pipeline, the second bypass pipeline 6, the first bypass pipeline 5 and the second pipeline 13 and then passes through the water-cooling water jacket 1.
After the water cooling water jacket 1 is determined to be close to the inner side wall 11 of the industrial furnace, the fourth bypass pipeline is selected to be used for introducing external compressed gas, and the external compressed gas enters the water cooling water jacket 1 through the second bypass pipeline 6 to cool the water cooling water jacket. Or the third bypass pipeline and the fourth bypass pipeline are both filled with external compressed gas, one part of external compressed gas enters the water-cooling water jacket 1 through the second bypass pipeline 6, and the other part of external compressed gas enters the water-cooling water jacket 1 through the first pipeline 12 to cool the water-cooling water jacket.
The water cooling water jacket 1 is cooled by external compressed gas, so that the situation that cooling water leaks from a leakage point of the water cooling water jacket 1 and encounters high-temperature solution in an industrial furnace body to explode, and safety accidents are caused is avoided. After the water cooling water jacket 1 of the embodiment has water leakage points, the industrial furnace does not need to be immediately shut down for maintenance, and the cooling mode is directly replaced, namely, an external compressed air cooling mode is adopted, so that the safety risk of water leakage of the water cooling water jacket 1 can be better eliminated, and the quick high-temperature ablation of dry burning of the water cooling water jacket 1 is reduced. After the third bypass pipeline and the fourth bypass pipeline are both filled with external compressed gas, the first pipeline 12 and the second bypass pipeline 6 are both filled with external compressed gas, so that the two sides of the inlet and the outlet of the water-cooling water jacket 1 are filled with air, and the compressed gas leaked by the leakage point is directly introduced into the furnace in an air cooling mode, so that explosion is not caused, and the cooling effect of the water-cooling water jacket 1 is better.
As an embodiment, the S23 includes: s231, if the first pipeline 12 or/and the second pipeline 13 are manually confirmed to have leakage, manually clamping the leakage point of the first pipeline 12 or/and the leakage point of the second pipeline 13, and then entering S3; s232, if the third valve 9 is confirmed to have leakage manually, replacing the third valve 9 manually, and then entering S3. The clamp operation, the clamp includes through the last clamp of second bolt fixed connection at the leak source and lower clamp to set up the rubber between leak source, last clamp and the lower clamp, go up clamp and lower clamp and rubber realization and carry out the shutoff to the leak source on the first pipeline 12 or/and the second pipeline 13. The clamp not only can realize the blocking of the leakage point, but also can not influence the leakage detection of the subsequent step. After the third valve 9 has a leakage point, the worker can directly replace the valve.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, but other embodiments can be easily made by those skilled in the art through substitution or modification according to the technical disclosure in the present specification, so that all changes and modifications made in the principle and process conditions of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides an online leak hunting device for industrial furnace water cooling jacket, the first mouth of a river and first pipeline (12) intercommunication of water cooling jacket (1), be provided with first valve (2) on first pipeline (12), first pipeline (12) still communicate with airtight water tank (3), be provided with first manometer (4) on airtight water tank (3), a serial communication port, online leak hunting device still includes first bypass pipeline (5) and second bypass pipeline (6), the second mouth of a river of water cooling jacket (1) through second pipeline (13) with first bypass pipeline (5) intercommunication, the one end that water cooling jacket (1) was kept away from to first bypass pipeline (5) is located the top of backwater open water tank, be provided with third valve (9) on first bypass pipeline (5), second bypass pipeline (6) with first bypass pipeline (5) intercommunication and be located the upper reaches of third valve (9), second bypass pipeline (6) are provided with second valve (7) in proper order.
2. The online leak detection device according to claim 1, further comprising a blind plate, wherein a first flange is arranged on the first pipe (12), a second flange is arranged on the first valve (2), the first flange and the second flange are fixedly connected through a first bolt, and the blind plate is arranged between the first flange and the second flange.
3. The on-line leak detection apparatus as defined in claim 1, further comprising a third bypass conduit in communication with the first conduit (12).
4. An in-line leak detection apparatus as defined in claim 3, further comprising a fourth bypass conduit, the fourth bypass conduit being a rubber hose, the rubber hose being in communication with the second bypass conduit (6).
5. An online leakage detection method for an industrial furnace water cooling jacket, which uses the online leakage detection device of any one of claims 1-4 to perform online leakage detection on the industrial furnace water cooling jacket, and is characterized by comprising the following steps:
S1, confirming whether a leakage point exists or not; if a leakage point exists, entering S2, otherwise entering S4;
s2, confirming the position of the first leakage point, and then entering S3;
s3, confirming the position of the leakage point for the second time, and then entering S4;
s4, ending the leak detection operation.
6. The online leak detection method according to claim 5, wherein S1 comprises:
s11, closing the first valve (2), the second valve (8) and the third valve (9);
S12, observing the numerical value displayed by the first pressure gauge (4) and the numerical value displayed by the second pressure gauge (7), and comparing the numerical value displayed by the first pressure gauge (4) with the numerical value displayed by the second pressure gauge (7);
S13, judging the numerical value, and if the numerical value displayed by the second pressure gauge (7) is smaller than the numerical value displayed by the first pressure gauge (4), entering S2; if the value displayed by the second pressure gauge (7) is larger than the value displayed by the first pressure gauge (4), the process goes to S4.
7. The online leak detection method according to claim 5, wherein S2 comprises:
S21, opening a first valve (2) and a third valve (9) and keeping a second valve (8) closed, wherein cooling water of the closed water tank (3) sequentially passes through a first pipeline (12), a water cooling jacket (1), a second pipeline (13) and a first bypass pipeline (5) and then reaches a backwater open water tank;
S22, opening the second valve (8) and closing the first valve (2) and the third valve (9) again, wherein external compressed gas sequentially passes through the fourth bypass pipeline, the second bypass pipeline (6), the first bypass pipeline (5), the second pipeline (13) and the water cooling water jacket (1) to the first pipeline (12);
s23, manually checking whether the first pipeline (12), the second pipeline (13) and the third valve (9) have leakage conditions of external compressed gas, if the first pipeline (12) or/and the second pipeline (13) or/and the third valve (9) have leakage conditions, closing the second valve (8) to perform maintenance operation, and then entering S3; if the first pipeline (12), the second pipeline (13) and the third valve (9) all operate normally, the process also enters S3.
8. The online leak detection method according to claim 7, wherein S23 includes:
S231, if the first pipeline (12) or/and the second pipeline (13) are manually confirmed to have leakage conditions, manually clamping the leakage points of the first pipeline (12) or/and the second pipeline (13), and then entering S3;
S232, if the third valve (9) is confirmed to have leakage, replacing the third valve (9) manually, and then entering S3.
9. The online leak detection method according to claim 5, wherein S3 comprises:
S31, opening a first valve (2) and a third valve (9) and closing a second valve (8), wherein cooling water of the closed water tank (3) sequentially passes through a first pipeline (12), a water cooling jacket (1), a second pipeline (13) and a first bypass pipeline (5) and then reaches a backwater open water tank;
s32, setting a blind plate between the first flange plate and the second flange plate, opening the second valve (8) and closing the first valve (2) and the third valve (9) again, and enabling an external water source to sequentially pass through a fourth bypass pipeline, a second bypass pipeline (6), a first bypass pipeline (5), a second pipeline (13), a water cooling water jacket (1) and a blind plate from the first pipeline (12) to the first valve (2);
S33, observing whether the value displayed by the second pressure gauge (7) has obvious rising conditions, if the value displayed by the second pressure gauge (7) does not rise, the water cooling water jacket (1) is close to the inner side wall (11) of the industrial furnace and has leakage points, and entering S4; if the value displayed by the second pressure gauge (7) is obviously increased, the water cooling water jacket (1) is close to the inner side wall (11) of the industrial furnace, no leakage point exists, and S4 is also entered.
10. The online leak detection method of claim 5, further comprising S5:
Opening the second valve (8) and closing the first valve (2) and the third valve (9), wherein external compressed gas sequentially passes through the fourth bypass pipeline, the second bypass pipeline (6), the first bypass pipeline (5) and the second pipeline (13) to the water cooling water jacket (1); or the first valve (2) and the second valve (8) are opened, the third valve (9) is closed, a part of external compressed gas sequentially passes through the third bypass pipeline and the first pipeline (12) to the water cooling water jacket (1), and the other part of external compressed gas sequentially passes through the fourth bypass pipeline and the second bypass pipeline (6), the first bypass pipeline (5) and the second pipeline (13) to the water cooling water jacket (1).
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|---|---|---|---|
| CN202410003096.0A CN117990297A (en) | 2024-01-02 | 2024-01-02 | Online leakage detection device and method for industrial furnace water cooling jacket |
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| CN202410003096.0A CN117990297A (en) | 2024-01-02 | 2024-01-02 | Online leakage detection device and method for industrial furnace water cooling jacket |
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| CN117990297A true CN117990297A (en) | 2024-05-07 |
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| CN (1) | CN117990297A (en) |
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