CN211620638U - Safety monitoring system for electrolytic device - Google Patents

Abstract

The utility model relates to a chemical industry safety in production technical field provides an electrolytic device safety monitoring system, include: the electrolytic cell is connected with an overflow pipe; and the thermal imager is fixed on one side of the electrolytic cell and faces the overflow pipe used for leading out combustible materials, and the thermal imager is higher than the electrolytic cell. The utility model provides an electrolysis unit safety monitoring system detects the condition of a fire through thermal imaging technique, carries out safety monitoring to the electrolysis trough to discover and control the condition of a fire as early as possible. The one side of electrolysis trough derivation combustible material is located to the thermal imaging appearance, and the thermal imaging appearance carries out holistic thermal imaging scanning to electrolysis trough upper portion, and its heat distribution field that corresponds the region is surveyed to the thermal imaging appearance, and combustible gas flows upwards and flame upwards burns, and the electrolysis trough top is located to the thermal imaging appearance, is convenient for quick, the accurate change that obtains the heat distribution field.

Description

Safety monitoring system for electrolytic device

Technical Field

The utility model relates to a chemical industry safety in production technical field especially relates to electrolytic device safety monitoring system.

Background

In the existing chlor-alkali production system, the ion membrane electrolytic workshop has a high automation level, and in the normal production process, the interior of the workshop is generally unattended except for occasional patrol personnel. The monitoring of the workshop is mainly carried out in a central control room for monitoring process parameters and common visible light video monitoring.

The ionic membrane electrolytic cell is mainly characterized in that brine is fed into each unit cell through a hose at the bottom of the cell, and a large current is dispersed to a cathode and an anode electrode of each unit cell through a busbar to electrolyze the brine; hydrogen and chlorine are generated in the electrolysis process, and respectively overflow from hoses at the upper parts of two sides of the electrolysis bath along with the return brine. The electrolytic cell is also provided with a unit cell and a main pipe which are connected with the electrolytic cell through hoses on two sides. If the hose is broken or the connector/gasket is broken, gas can easily leak out of it. If hydrogen gas is leaked, a fire is easily caused. The ignition temperature of hydrogen is 400 deg.C (pure hydrogen), the explosion limit in air is 4.1-74.2% (volume concentration), and the minimum ignition energy is 0.019 mJ. The leaked hydrogen gas may be ignited by an overheated part of the upper part of the electrolytic bath (e.g., a partially short-circuited electrode), an arc (between electrodes), or an electrostatic discharge, etc.

Water (steam) is produced due to hydrogen combustion, there is no smoke, and the hydrogen flame is pale blue or pale yellow. Therefore, when hydrogen leakage occurs in an electrolysis plant and a fire occurs by combustion, the fire is not easily detected if the flame does not ignite other components to generate a bright fire or a dense smoke. In modern electrolytic workshops which are patrolled by few people, larger fire can easily be generated, and great loss is caused.

At present, no related art is available to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an electrolytic device safety monitoring system detects the condition of a fire through thermal imaging technique, carries out safety monitoring to the electrolysis trough to discover and control the condition of a fire as early as possible.

According to the utility model discloses electrolysis unit safety monitoring system of first aspect embodiment includes: the electrolytic cell is connected with an overflow pipe; and the thermal imager is fixed on one side of the electrolytic cell and faces the overflow pipe used for leading out combustible materials, and the thermal imager is higher than the electrolytic cell.

According to the utility model discloses an embodiment, thermal imaging system upper shield is equipped with explosion-proof cover, be equipped with import and export on the explosion-proof cover, the thermal imaging system is located the import with between the export, the import is used for letting in the refrigerant.

According to an embodiment of the present invention, the inlet communicates with the instrument gas line.

According to an embodiment of the present invention, the inlet and the outlet all communicate with the instrument gas line.

According to the utility model discloses an embodiment, be equipped with the fixed slot in the explosion-proof cover, the fixed slot internal fixation thermal imaging system.

According to one embodiment of the present invention, the thermal imaging system is fixed to the wall and/or the column at one end of the electrolytic cell.

According to an embodiment of the present invention, the thermal imaging system is located at a height 1.1 to 1.5 times the height of the electrolytic cell.

According to an embodiment of the utility model, still include control system, control system connects thermal imaging system and chain parking system, so that the electrolysis trough shuts down.

According to an embodiment of the invention, the control system is provided with an audio alarm and/or a photo-electric alarm.

According to an embodiment of the utility model, still include the camera, the camera is located the top of electrolysis trough.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

the utility model discloses an embodiment, thermal imaging system locates the electrolysis trough and derives one side of combustible material, and thermal imaging system carries out holistic thermal imaging scanning to electrolysis trough upper portion, and thermal imaging system surveys its heat distribution field that corresponds the region, and combustible gas upflow is and flame upwards burns, and the electrolysis trough top is located to thermal imaging system, is convenient for quick, the accurate change that obtains the heat distribution field. The device is suitable for detecting various flames which are not easy to be captured and found through visible light, is particularly suitable for detecting flames caused by hydrogen leakage of an electrolysis device in a chlor-alkali production system, can accurately judge the leaked smokeless and colorless hydrogen flames, can find the leaked smokeless and colorless hydrogen flames in the early stage of a fire disaster inoculation process and a fire disaster, and avoids the occurrence and expansion of ignition accidents of an electrolysis bath.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a safety monitoring system of an electrolyzer provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure between a thermal imaging instrument and an explosion-proof cover of the safety monitoring system of the electrolysis device provided by the embodiment of the present invention;

fig. 3 is a schematic view of a connection structure between a thermal imaging camera and a control system of an electrolysis device safety monitoring system provided in an embodiment of the present invention.

Reference numerals:

1: an electrolytic cell; 2: a column; 3: a wall body; 4: a thermal imager; 41: a first thermal imager; 42: a second thermal imager; 5: a base; 6: an explosion-proof cover; 61: an inlet; 62: an outlet; 63: an installation position; 7: an on-site explosion-proof area; 8: between the instrument cabinets; 9: a control room; 10: an alarm console; 11: a first power converter; 12: a first switch; 13: a first fiber optic transceiver; 14: a workstation; 15: an alarm operating cabinet; 16: a second power converter; 17: a second switch; 18: a PLC controller; 19: a chain parking cabinet; 20: a third power converter; 21: a third switch; 22: a second fiber optic transceiver; 23: a field junction box; 24: an optical cable.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Referring to fig. 1 to 3, in an embodiment of the present invention, there is provided an electrolysis apparatus safety monitoring system, including: the electrolytic cell 1 is connected with an overflow pipe; and the thermal imager 4 is fixed on one side of the electrolytic cell 1 and faces an overflow pipe for leading out combustible materials, and the thermal imager 4 is higher than the electrolytic cell 1.

The electrolytic cell 1 can be used for electrolysis of various solutions, gas and residual liquid generated in the electrolysis process are discharged through overflow pipes, and the overflow pipes are arranged at the cathode and the anode of the electrolytic cell 1; an overflow pipe on at least one side of the electrolytic cell 1 is used for discharging combustible materials (cathode or anode), such as combustible gas. The thermal imaging instrument 4 is arranged at one side of the electrolytic cell 1 from which the combustible material is led out, the thermal imaging instrument 4 performs integral thermal imaging scanning on the upper part of the electrolytic cell 1, and the thermal imaging instrument 4 measures a thermal distribution field of a corresponding area; wherein the data of the thermal distribution field comprises temperature data and image data. In general, the combustible gas flows upwards and the flame burns upwards, and the thermal imaging instrument 4 is arranged above the electrolytic cell 1, so that the change of the thermal distribution field can be rapidly and accurately obtained.

When the combustible material is heated and combusted, the heat distribution field measured by the thermal imager 4 is changed, and then the staff can obtain whether the fire occurs according to the change of the heat distribution field, so that the fire can be found in time, the fire hidden danger can be eliminated in advance, the fire at the initial stage can be found and alarmed in time, the accident can be prevented from being enlarged, and the problem that the fire can not be found in time in the prior art can be solved.

Wherein, the overflow pipe generally selects the hose for use, and the hose is convenient for location and installation.

In combination with the above, the embodiment is suitable for detecting various flames which are not easily captured and found through visible light, and is particularly suitable for detecting flames caused by hydrogen leakage of an electrolysis device in a chlor-alkali production system, and can accurately judge the leaked smokeless and colorless hydrogen flames, so that the flames can be found in the early stage of a fire inoculation process and a fire, and the occurrence and expansion of ignition accidents of the electrolytic cell 1 are avoided.

The thermal imager 4 is an infrared thermal imager which converts invisible infrared energy emitted by an object into a visible thermal image, so that the observation of workers is facilitated.

In another embodiment, as shown in fig. 1 and fig. 2, the thermal imager 4 is covered with an explosion-proof cover 6, and the explosion-proof cover 6 plays a role in protecting the thermal imager 4, so as to prevent the thermal imager 4 from being damaged when a fire occurs, and ensure the accuracy of monitoring the fire by the thermal imager 4. Moreover, the explosion-proof cover 6 also plays a role in isolating heat inside the thermal imager 4, and combustible gas combustion caused by local overheating of the thermal imager 4 is avoided.

Further, an inlet 61 and an outlet 62 are arranged on the explosion-proof cover 6, the thermal imaging system 4 is arranged between the inlet 61 and the outlet 62, and the inlet 61 is used for introducing a refrigerant. The coolant that lets in explosion-proof cover 6 through import 61 cools down thermal imaging system 4, and the coolant after the heat transfer is discharged through export 62, avoids appearing blue screen or red screen phenomenon because of thermal imaging system 4 is overheated.

The inlet 61 and the outlet 62 can be communicated through a pipeline or through the inner space of the explosion-proof cover 6, and the structure is various. The refrigerant may be in a gaseous or liquid state.

In another embodiment, the inlet 61 is communicated with an instrument gas pipeline, cold air is introduced into the inlet 61 through the instrument gas pipeline so as to carry out heat exchange and temperature reduction on the thermal imager 4, and the instrument gas is directly discharged from the outlet 62 after being subjected to heat exchange with the thermal imager 4, so that the structure is simple.

In another embodiment, the inlet 61 and the outlet 62 are both communicated with an instrument gas pipeline, the instrument gas pipeline provides cold air to the inlet 61, the cold air flows back to the instrument gas pipeline from the outlet 62 after heat exchange and temperature rise, the heated cold air is cooled in the instrument gas pipeline and then provides the cold air to the explosion-proof cover 6, and the air in the instrument gas pipeline is recycled, so that the influence of the external environment on the surrounding environment of the electrolysis device is reduced.

Wherein, the one end of explosion-proof cover 6 sets up installation position 63 for install on the installation face, and import 61 is close to installation position 63 and sets up, namely position thermal imaging camera 4's rear, and export 62 is located the place ahead of thermal imaging camera 4. The front and the back are distinguished according to the imaging direction of the thermal imager 4, and the imaging direction of the thermal imager 4 is the front.

In another embodiment, a fixing groove (not shown) is formed in the explosion-proof cover 6, the thermal imager 4 is fixed in the fixing groove, and the fixing groove is arranged to facilitate fixing and installation of the thermal imager 4. Wherein, the explosion-proof cover 6 is connected with the thermal imager 4 as a whole and then is installed on the installation surface, thereby simplifying the field installation process.

In another embodiment, the explosion-proof cover 6 and the thermal imager 4 are not directly connected, and the explosion-proof cover 6 and the thermal imager 4 are both fixed on the installation surface, so that the explosion-proof cover 6 covers the thermal imager 4, and the explosion-proof cover 6 and the thermal imager 4 are conveniently and independently arranged.

In another embodiment, as shown in fig. 1, the thermal imaging camera 4 is fixed to the wall 3 and/or the column 2 at one end of the electrolytic cell 1. Specifically, a first thermal imager 41 is mounted on the wall 3, and a second thermal imager 42 is mounted on the column 2. When two thermal imaging cameras 4 are installed at the same time, the measuring range is wider, and the monitoring accuracy is improved. When only one thermal imager 4 is arranged on the wall 3 or the upright post 2, the cost is low; preferably, the thermal imager 4 is installed on the wall 3, and the installation position 63 on the wall 3 is higher, so that the measurement range is wider. Wherein, the electrolytic cell 1 is fixed on the base 5, the upright post 2 is also connected on the base 5, the wall 3 is positioned on one side of the base 5, and the height is set according to the requirement.

In another embodiment, the plurality of thermal imaging cameras 4 are positioned at a height 1.1 to 1.5 times the height of the electrolytic cell 1. The experiment shows that the height of hydrogen combustion around the electrolytic cell 1 is generally 1.1-1.5 times of the height of the electrolytic cell 1, and the hydrogen monitoring device is suitable for hydrogen monitoring.

Specifically, when the height of the electrolytic cell 1 is 4m, the thermal imaging camera 4 is arranged at a position 1m above the electrolytic cell, so that the fire can be detected, and the installation is convenient.

In another embodiment, as shown in fig. 1 and 3, the electrolyzer safety monitoring system further comprises a control system, which is connected with the thermal imaging camera 4 and the chain stopping system to stop the electrolyzer 1. The thermal imager 4 sends the data of the thermal distribution field to the control system, and the control system receives the data of the thermal distribution field. Wherein, the control system can be internally provided with a temperature limit value, when the highest temperature or the average temperature measured by the thermal imager 4 reaches the temperature limit value, the control system sends a shutdown instruction to the chain parking system, and the chain parking system is started to stop the electrolytic cell 1. Whether the control system sends a shutdown instruction to the chain parking system can be realized through the comparator.

In addition, the control system may also include a display through which the worker may view the thermal distribution field. When the staff finds that the thermal distribution field is in a fire state detected by the thermal imager 4, the chain parking system is started, the electrolytic cell 1 is stopped, the fire state is rapidly processed, and the fire state is restrained from expanding.

In another embodiment the control system is provided with an audio alarm and/or a photo alarm so that the staff member obtains the alarm signal by means of hearing or vision.

In another embodiment, as described in connection with fig. 3, the control system includes a first control system and a second control system, both of which are connected to the thermal imaging camera 4, the first control system is located at the alarm console 10 of the control room 9, and the second control system is located at the alarm console cabinet 15 of the instrumentation cabinet 8. The control room 9 and the instrument cabinet 8 simultaneously monitor the production site of the electrolytic cell 1.

Specifically, the field explosion-proof area 7 (i.e., the production field of the electrolytic cell 1) is provided with a field junction box 23, and the field junction box 23 has an explosion-proof function. The on-site wiring box 23 is connected with the thermal imager 4, a third power converter 20, a third switch 21 and a second optical fiber transceiver 22 are arranged in the on-site wiring box 23, the third power converter 20 is connected with a 220V power supply and supplies power to the thermal imager 4, the third switch 21 is connected with the thermal imager 4 through a network cable, and the third switch 21 is connected with the second optical fiber transceiver 22.

The alarm console 10 comprises a first power converter 11, a first switch 12 and a first optical fiber transceiver 13, wherein the first power converter 11 is connected with a 220V power supply, the first optical fiber transceiver 13 is connected with a second optical fiber transceiver 22 of a field junction box 23 through an optical cable 24, and the thermal distribution field signals collected by the thermal imager 4 are transmitted to the alarm console 10 of the control room 9. The alarm console 10 also includes a workstation 14 for data storage and the like.

The alarm operation cabinet 15 comprises a second power converter 16, a second switch 17 and a PLC (programmable logic controller) 18, the second power converter 16 is connected with a 220V power supply, the second switch 17 is connected with a third switch 21 through a network cable, the second switch 17 is connected with the PLC 18 to transmit a heat distribution field signal collected by the thermal imager 4 to the PLC 18, the PLC 18 is connected with a chain parking cabinet 19, and a chain parking system is arranged in the chain parking cabinet 19. The chain parking system can adopt a DCS system, namely a distributed control system.

Wherein, 2-core cable connection is adopted among all the power converters. The optical cable 24 is a 4-core optical cable 24.

Further, alarms (audio alarms and/or photoelectric alarms) are provided on the alarm console 10 and the alarm console cabinet 15, so that the staff in the control room 9 and the meter cabinet 8 can quickly obtain alarm signals.

In another embodiment, the safety monitoring system for the electrolysis device further comprises a camera (not shown in the figure), wherein the camera is arranged above the electrolysis bath 1 and is matched with the thermal imager 4 to monitor visible light and invisible light simultaneously so as to discover the fire in time. Wherein, the camera can shoot the image information above the electrolytic cell 1 so that the staff can accurately distinguish the fire.

The operation of this embodiment will be described in detail below, taking as an example the case where the ion membrane electrolyzer electrolyzes brine and generates hydrogen.

The electrolytic cell 1 conveys the brine to each unit cell and electrolyzes the brine therein to generate hydrogen and chlorine, the hydrogen overflows along with the return brine from an overflow pipe at the cathode of the electrolytic cell 1, and the chlorine overflows along with the return brine from an overflow pipe at the anode of the electrolytic cell 1. When the overflow pipe on the hydrogen gas discharge side is broken or the connector/gasket is broken, hydrogen gas easily leaks from the broken portion and flows upward. If the hydrogen is ignited, fire occurs, the operation parameters of the chlor-alkali production system are not abnormal, the hydrogen flame is blue, the hydrogen flame is difficult to find, dense smoke cannot be generated, and the fire is difficult to find if no staff visits.

At this time, by using the safety monitoring system of the electrolysis device of the embodiment, the thermal imager 4 is fixed on the upright column 2 or the wall 3 at the cathode liquid outlet end of the electrolysis bath 1 and is provided with the explosion-proof cover 6 and the control system, the thermal imager 4 performs integral thermal imaging scanning on the upper part of the electrolysis bath 1 to obtain a hydrogen discharge side thermal distribution field, and the staff in the control room 9 or the instrument cabinet room 8 can obtain the thermal distribution field at the position of the electrolysis bath 1 in time, so that the fire condition can be obtained according to the change of the thermal distribution field, the pre-investigation of the fire hazard is realized, and the timely discovery and alarm at the initial stage of the fire condition are realized, so as to make emergency treatment.

Specifically, the thermal imaging system 4 transmits the signal of the thermal distribution field to the display of the control room 9 or the instrument cabinet 8 through the local area network, and when an abnormal condition occurs, the display performs screen display alarm, and simultaneously outputs an audio alarm signal and an optical alarm signal, and stores the thermal distribution field information and the picture of the abnormal process according to time nodes so as to check the file.

In the embodiment, the information technology and the depth fusion of the safety control of the modern chemical production are implemented, the thermal imager 4 is used for collecting the temperature, and the image recognition technology is used for accurately judging the fire species and the comburent, so that the aims of sending out an alarm and an instruction in the fire breeding process and the early stage of the fire are fulfilled; is suitable for the smokeless and colorless gas combustion process, is particularly suitable for solving the problems of catching and discovering the hydrogen leakage and combustion condition of the ion membrane electrolyzer 1 and preventing the accident from expanding. And the system is simple and safe to operate.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims (10)

1. An electrolyzer safety monitoring system, comprising:

the electrolytic cell is connected with an overflow pipe;

and the thermal imager is fixed on one side of the electrolytic cell and faces the overflow pipe used for leading out combustible materials, and the thermal imager is higher than the electrolytic cell.

2. The safety monitoring system for the electrolysis device according to claim 1, wherein the thermal imaging system is provided with an explosion-proof cover, the explosion-proof cover is provided with an inlet and an outlet, the thermal imaging system is arranged between the inlet and the outlet, and the inlet is used for introducing a cooling medium.

3. The electrolyzer safety monitoring system of claim 2 wherein the inlet communicates with an instrument gas line.

4. The electrolyzer safety monitoring system of claim 2 wherein both the inlet and the outlet communicate with an instrument gas line.

5. The electrolyzer safety monitoring system of claim 2 wherein a securing slot is provided in the explosion proof enclosure, said securing slot securing the thermal imager therein.

6. The electrolyzer safety monitoring system of claim 1 wherein the thermal imager is affixed to a wall and/or a column at one end of the electrolyzer.

7. The electrolyzer safety monitoring system of claim 1 wherein several of the thermal imagers are located at a height 1.1-1.5 times the height of the electrolyzer.

8. The electrolyzer safety monitoring system of claim 1 further comprising a control system connecting the thermal imager and a chain shutdown system to shutdown the electrolyzer.

9. The electrolyzer safety monitoring system of claim 8 wherein the control system is provided with an audio alarm and/or a photoelectric alarm.

10. The electrolyzer safety monitoring system of claim 1 further comprising a camera positioned above the electrolyzer.

Images