Drainage system for bottom plate of converter gas holder

Abstract

The invention discloses a converter gas holder bottom plate drainage system which comprises a first water collecting pit arranged below a converter gas holder bottom plate, a base is arranged in the first water collecting pit, a bottom plate drainer is installed on the base, and the bottom plate drainer is communicated with the converter gas holder bottom plate through a connecting pipe; a second water collecting pit is arranged at the bottom of the first water collecting pit, a submersible sewage pump and a floating ball switch are arranged in the second water collecting pit, the floating ball switch is electrically connected with the submersible sewage pump, and the floating ball switch is used for controlling the submersible sewage pump to be started and stopped according to the water level in the second water collecting pit. The first water collecting pit and the bottom plate drainer are arranged, the deeper second water collecting pit and the submersible sewage pump controlled by the floating ball switch are matched, accumulated water is automatically drained, the bottom plate drainer is effectively prevented from being soaked and rusted, and the service life of equipment is prolonged; the bottom plate drainer and the submersible sewage pump are communicated in a centralized mode through the annular open trench to drain water, blockage, leakage and other abnormalities are found in time, the problem that a traditional concealed pipe is inconvenient to check is solved, and water can be drained more smoothly.

Description

Technical Field

[0001] This invention relates to the field of iron and steel metallurgical equipment technology, and in particular to a converter gas holder bottom plate drainage system. Background Technology

[0002] In the converter gas recovery process of iron and steel metallurgical enterprises, when a wet recovery method is adopted, a large amount of condensate will be continuously generated during the operation of the converter gas holder. This condensate needs to be discharged through the bottom plate drain and transported to the wastewater station for centralized treatment to ensure the normal operation of the converter gas holder.

[0003] In existing technology, the bottom plate drain of the converter gas holder is usually installed in a pit below ground level. This pit is prone to accumulating ambient water or condensate backflow, causing the bottom plate drain to be submerged in water for a long time. This submersion accelerates the corrosion and aging of the bottom plate drain, shortens its service life, and increases equipment maintenance costs and downtime risks. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a converter gas holder bottom plate drainage system, which aims to solve the problem that the bottom plate drainer is prone to corrosion and aging when immersed in water for a long time in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: a converter gas holder bottom plate drainage system, including a first water collection pit set below the converter gas holder bottom plate, a base set in the first water collection pit, and a bottom plate drainer installed on the base. The bottom plate drainer is connected to the converter gas holder bottom plate through a connecting pipe. A second water collection pit is set at the bottom of the first water collection pit, and a submersible pump and a float switch are set in the second water collection pit. The float switch is electrically connected to the submersible pump and is used to control the start and stop of the submersible pump according to the water level in the second water collection pit. By setting a second water collection pit at the bottom of the first water collection pit, and matching it with a submersible pump and a float switch and electrically connecting the two, the float switch can automatically control the start and stop of the submersible pump according to the water level in the second water collection pit, promptly draining accumulated water, continuously maintaining a dry working environment for the bottom plate drainer, keeping the bottom plate drainer away from the water at the bottom of the pit, avoiding long-term soaking, effectively delaying equipment corrosion, and extending service life. Through automated water level control and drainage design, frequent manual inspection of the drainage pit's water level is eliminated, reducing manual maintenance costs.

[0006] As a further improvement of the present invention: the float switch is used to control the start and stop of the submersible sewage pump according to the water level in the second sump, including: if the water level in the second sump rises to the high water level trigger height, the float switch triggers the submersible sewage pump to start; if the water level in the second sump drops to the low water level trigger height, the float switch controls the submersible sewage pump to stop working. By monitoring the high water level in the second sump and triggering the submersible sewage pump to start, the accumulated water can be discharged in time, avoiding water overflow and soaking the bottom drain, effectively delaying equipment corrosion; by controlling the submersible sewage pump to stop when the water level is low, the float switch can prevent the equipment from running idly, saving energy and reducing mechanical wear, extending the service life of the submersible sewage pump; the automatic start and stop design triggered by water level eliminates the need for manual operation, reduces manual inspection and control costs, and ensures timely response and stable operation of the drainage system.

[0007] As a further improvement of the present invention: the high water level trigger height of the float switch is 100-150mm from the top of the second sump, and the low water level trigger height of the float switch is 50-80mm from the bottom of the second sump. By setting the high water level trigger height of the float switch to 100-150mm from the top of the second sump, sufficient water level buffer space can be reserved, effectively preventing water from overflowing and soaking the bottom drain, and ensuring a dry working environment for the equipment; by setting the low water level trigger height to 50-80mm from the bottom of the second sump, both dry running and wear of the submersible pump are prevented, and residual water in the pit is reduced, thus reducing the risk of corrosion; by clearly defining a specific trigger height range that is suitable for the working conditions, the float switch can be precisely controlled, the start and stop timing of the submersible pump can be reasonable, and the drainage system can be stably responded to.

[0008] As a further improvement of the present invention: four first water collection pits are provided, which are evenly distributed below the bottom plate of the converter gas holder, and the bottom plate drain in each first water collection pit is connected to the bottom plate of the converter gas holder through a connecting pipe. By setting four evenly distributed first water collection pits, condensate from various parts of the converter gas holder bottom plate can flow into the corresponding bottom plate drain nearby, avoiding local water accumulation and improving the comprehensiveness of drainage coverage; by connecting the bottom plate drain in each first water collection pit to the bottom plate of the gas holder, the condensate discharge path is dispersed, the load on a single bottom plate drain is reduced, the probability of blockage is reduced, and smooth drainage is ensured; the evenly distributed layout design makes the converter gas holder bottom plate more evenly stressed, and the drainage efficiency of each area is consistent, effectively maintaining the overall dry environment of the bottom plate and further delaying equipment corrosion.

[0009] As a further improvement of the present invention: the depth of the first collection pit is less than the depth of the second collection pit. By setting the depth of the first collection pit to be less than that of the second collection pit, the second collection pit forms a lower water collection point, which can efficiently collect water from the surrounding environment and possible leakage water, and prevent water from flowing back into the first collection pit; the depth difference allows the bottom plate drain in the first collection pit to be in a relatively higher position, away from water erosion, maintaining a dry working environment and delaying equipment corrosion; the deeper second collection pit provides sufficient water level buffer space, reducing the start and stop of the submersible pump due to frequent water level fluctuations, reducing mechanical wear, and ensuring the stable operation of the drainage system.

[0010] As a further improvement of the present invention, it also includes an annular open ditch, which is arranged around the bottom plate of the converter gas holder, and the outlet of the annular open ditch is connected to the wastewater station. The bottom plate drainer is connected to the annular open ditch through a first drain pipe, and the submersible pump is connected to the annular open ditch through a second drain pipe. By arranging the annular open ditch around the bottom plate of the converter gas holder and centrally connecting the drainage of the bottom plate drainer and the submersible pump, the drainage path is unified and orderly, avoiding the chaotic arrangement of scattered pipes and improving the centralized discharge efficiency of condensate and accumulated water. The open structure of the annular open ditch allows staff to directly observe the drainage flow and status, promptly detecting abnormalities such as blockages and leaks, solving the problem of inconvenient inspection of traditional concealed pipes. The direct connection of the annular open ditch to the wastewater station eliminates the need for intermediate transfer links in drainage, reducing the risk of stagnation and ensuring smooth drainage.

[0011] As a further improvement of the present invention, the annular open ditch is covered with a grating plate. By covering the annular open ditch with a grating plate, it is possible to effectively prevent personnel from accidentally falling into the ditch, while also preventing debris and waste from falling into the ditch and causing blockages, thus ensuring operational safety and smooth drainage. The perforated structure of the grating plate does not obstruct observation of the drainage flow and status within the open ditch, preserving the visibility advantage of the annular open ditch and facilitating timely detection of abnormalities by staff. The protective function of the grating plate makes the inner wall of the annular open ditch less susceptible to damage from the external environment, and the grating plate is easy to disassemble, facilitating subsequent cleaning and maintenance of the annular open ditch, reducing maintenance difficulty, and improving the safety and convenience of system operation and maintenance.

[0012] As a further improvement of the present invention, the grating is made of stainless steel. By using stainless steel, the grating can resist the erosion of condensation and environmental moisture, is not prone to rust and corrosion, extends its service life, and reduces the maintenance costs associated with frequent replacements. The high strength of stainless steel allows the grating to stably withstand the impact of workers stepping on it and minor heavy objects, without easily deforming or breaking.

[0013] As a further improvement of the present invention: the width of the annular open ditch is 300-500mm, and the depth of the annular open ditch is 400-600mm. By setting the width of the annular open ditch to 300-500mm, it can fully adapt to the drainage flow of the bottom plate drain and the submersible pump, avoiding drainage congestion caused by narrow channels, while reserving sufficient operating space for workers to carry out dredging and maintenance; by setting the depth to 400-600mm, the annular open ditch has sufficient water accumulation buffer volume, which can cope with concentrated drainage in a short period of time and prevent water from overflowing and soaking surrounding equipment.

[0014] As a further improvement of the present invention, the inner wall of the annular open ditch is treated with cement mortar plastering. This cement mortar plastering creates a dense and smooth protective layer on the inner wall, effectively blocking condensate seepage, preventing moisture erosion of the surrounding soil and equipment foundations, and ensuring site dryness and structural stability. The smooth plastering surface reduces water flow resistance, facilitates smoother condensate drainage, and prevents the adhesion of dirt and debris, reducing the risk of siltation and blockage in the annular open ditch and decreasing the frequency of dredging. Furthermore, the reinforcement effect of the cement mortar enhances the structural strength of the inner wall of the annular open ditch, making it less susceptible to damage from external impacts and long-term water erosion, thus extending the service life of the annular open ditch.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention involves setting a second sump at the bottom of the first sump, and connecting it with a submersible pump and a float switch. The float switch automatically controls the start and stop of the submersible pump based on the water level in the second sump, promptly draining accumulated water and maintaining a dry working environment for the bottom plate drain. This keeps the bottom plate drain away from the water at the bottom of the sump, preventing long-term immersion, effectively delaying equipment corrosion, and extending its service life. Through automated water level control and drainage design, frequent manual inspections of the drainage sump are no longer required, reducing manual maintenance costs. At the same time, it ensures the stable operation of the drainage system and prevents water accumulation from affecting the efficiency of condensate drainage.

[0016] 2. This invention uses an annular open ditch surrounding the bottom plate of the converter gas holder, centrally connecting the bottom plate drainer and the submersible sewage pump. This ensures a unified and orderly drainage path, avoiding the chaotic layout of scattered pipes and improving the centralized discharge efficiency of condensate and accumulated water. The open structure of the annular open ditch allows staff to directly observe the drainage flow and status, promptly detecting abnormalities such as blockages and leaks, solving the problem of inconvenient inspection of traditional concealed pipes. The annular open ditch is directly connected to the wastewater station, eliminating the need for intermediate transfer links in drainage, reducing the risk of stagnation, simplifying the system layout, reducing the difficulty of pipe maintenance, and ensuring smooth drainage. Attached Figure Description

[0017] Figure 1 This is a plan view of a converter gas holder bottom plate drainage system according to the present invention.

[0018] Figure 2 This is a partial elevation view of a converter gas holder bottom plate drainage system according to the present invention.

[0019] Attached reference numerals: 1. Converter gas holder bottom plate; 2. Circular open ditch; 3. Connecting pipe; 4. First sump; 5. Bottom plate drain; 6. First drain pipe; 7. Submersible pump; 8. Second drain pipe; 9. Base; 10. Second sump; 11. Float switch; 12. Wastewater station. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and embodiments: Please see Figure 1-2A converter gas holder bottom plate drainage system includes a first water collection pit 4 located below the converter gas holder bottom plate 1. The first water collection pit 4 has a base 9 inside, and a bottom plate drainer 5 is installed on the base 9. The bottom plate drainer 5 is connected to the converter gas holder bottom plate 1 through a connecting pipe 3. A second water collection pit 10 is located at the bottom of the first water collection pit 4. The second water collection pit 10 has a submersible pump 7 and a float switch 11 inside. The float switch 11 is electrically connected to the submersible pump 7 and is used to control the start and stop of the submersible pump 7 according to the water level in the second water collection pit 10.

[0025] By setting a second collection pit 10 at the bottom of the first collection pit 4, and connecting it with a submersible pump 7 and a float switch 11, the float switch 11 can automatically control the start and stop of the submersible pump 7 according to the water level of the second collection pit 10, so as to discharge the accumulated water in time and maintain a dry working environment for the bottom plate drain 5. This keeps the bottom plate drain 5 away from the water at the bottom of the pit, avoids long-term soaking, effectively delays equipment corrosion, and extends its service life. Through automated water level control and drainage design, there is no need for frequent manual inspection of the water accumulation in the drainage pit, reducing manual maintenance costs, while ensuring the stable operation of the drainage system and preventing water accumulation from affecting the efficiency of condensate drainage.

[0026] In some embodiments, the float switch 11 is used to control the start and stop of the submersible sewage pump 7 according to the water level in the second sump 10, including: if the water level in the second sump 10 rises to the high water level trigger height, the float switch 11 triggers the submersible sewage pump 7 to start; if the water level in the second sump 10 drops to the low water level trigger height, the float switch 11 controls the submersible sewage pump 7 to stop working.

[0027] The float switch 11 monitors the high water level of the second collection pit 10 and triggers the submersible sewage pump 7 to start, ensuring timely drainage of accumulated water and preventing water overflow that could soak the bottom plate drain 5, thus effectively delaying equipment corrosion. When the water level is low, the float switch 11 controls the submersible sewage pump 7 to stop, preventing the equipment from running idle, saving energy, reducing mechanical wear, and extending the service life of the submersible sewage pump 7. The automatic start-stop design triggered by water level eliminates the need for manual operation, reducing manual inspection and control costs, ensuring timely response and stable operation of the drainage system, and ensuring that the bottom plate drain 5 is always in a dry working environment.

[0028] In some embodiments, the high water level trigger height of the float switch 11 is 100-150mm from the top of the second water collection pit 10, and the low water level trigger height of the float switch 11 is 50-80mm from the bottom of the second water collection pit 10.

[0029] By setting the high water level trigger height of the float switch 11 to 100-150mm from the top of the second collection pit 10, sufficient water level buffer space can be reserved to effectively prevent water from overflowing and soaking the bottom drain 5, ensuring a dry working environment for the equipment. By setting the low water level trigger height to 50-80mm from the bottom of the second collection pit 10, both dry running and wear of the submersible pump 7 can be prevented, and residual water in the pit can be reduced, thus reducing the risk of corrosion. By clearly defining the specific trigger height range that is suitable for the working conditions, the float switch 11 can be precisely controlled, the start and stop timing of the submersible pump 7 can be reasonable, the drainage system can be stably responded to, and both equipment protection and drainage efficiency can be taken into account.

[0030] In some embodiments, there are four first water collection pits 4, which are evenly distributed below the bottom plate 1 of the converter gas holder, and the bottom plate drain 5 in each first water collection pit 4 is connected to the bottom plate 1 of the converter gas holder through a connecting pipe 3.

[0031] By setting up four evenly distributed first water collection pits 4, condensate from various parts of the converter gas holder bottom plate 1 can be collected into the corresponding bottom plate drain 5 nearby, avoiding local water accumulation and improving the comprehensiveness of drainage coverage. Since the bottom plate drain 5 in each first water collection pit 4 is connected to the gas holder bottom plate, the condensate discharge path is dispersed, the load on a single bottom plate drain 5 is reduced, the probability of blockage is reduced, and smooth drainage is ensured. Through the evenly distributed layout design, the converter gas holder bottom plate 1 is subjected to more balanced stress, and the drainage efficiency of each area is consistent, effectively maintaining the overall dry environment of the bottom plate, further delaying equipment corrosion, and improving the stability of system operation.

[0032] In some embodiments, the depth of the first water collection pit 4 is less than the depth of the second water collection pit 10.

[0033] By setting the depth of the first collection pit 4 to be less than that of the second collection pit 10, the second collection pit 10 forms a lower water collection point, which can efficiently collect water from the surrounding environment and possible leakage water, and prevent water from flowing back into the first collection pit 4. The depth difference allows the bottom plate drain 5 in the first collection pit 4 to be in a relatively higher position, away from water erosion, to maintain a dry working environment and delay equipment corrosion. The deeper second collection pit 10 provides sufficient water level buffer space, reducing the start and stop of the submersible pump 7 due to frequent water level fluctuations, reducing mechanical wear, ensuring stable operation of the drainage system, and extending the overall service life.

[0034] In the existing technology, after the condensate is discharged from the bottom plate drain, it is usually transported to the centralized water tank through the drainage pipe and then discharged to the wastewater station. Because the drainage pipe is concealed, it is difficult to quickly find the blockage location once it is blocked, and the cleaning operation is difficult and inefficient, which can easily lead to obstruction of condensate discharge and affect the safe and stable operation of the converter gas holder.

[0035] To address the aforementioned issues, some embodiments of the present invention further include an annular open ditch 2, which is arranged around the bottom plate 1 of the converter gas holder, and the outlet of the annular open ditch 2 is connected to the wastewater station 12. The bottom plate drainer 5 is connected to the annular open ditch 2 through a first drain pipe 6, and the submersible sewage pump 7 is connected to the annular open ditch 2 through a second drain pipe 8.

[0036] The annular open ditch 2 is set around the bottom plate 1 of the converter gas holder and centrally connects the drainage of the bottom plate drainer 5 and the submersible sewage pump 7, so that the drainage path is uniform and orderly, avoiding the messy layout of scattered pipes and improving the centralized discharge efficiency of condensate and accumulated water. The open structure of the annular open ditch 2 allows the staff to directly observe the drainage flow and status, and promptly detect abnormalities such as blockages and leaks, solving the problem of inconvenience in the inspection of traditional concealed pipes. The annular open ditch 2 is directly connected to the wastewater station 12, so that drainage does not require intermediate transfer links, reducing the risk of stagnation, simplifying the system layout, reducing the difficulty of pipe maintenance, and ensuring smooth drainage.

[0037] In some embodiments, the annular open ditch 2 is covered with a grating plate.

[0038] By covering the annular open ditch 2 with a grating plate, it is possible to effectively prevent personnel from accidentally falling into the annular open ditch 2, while also preventing debris and waste from falling into the ditch and causing blockages, thus ensuring operational safety and smooth drainage. The perforated structure of the grating plate does not obstruct the observation of the drainage flow and status within the open ditch, preserving the visibility advantage of the annular open ditch 2, making it easy for staff to detect abnormalities in a timely manner. The protective function of the grating plate makes the inner wall of the annular open ditch 2 less susceptible to damage from the external environment, and the grating plate is easy to disassemble, facilitating subsequent cleaning and maintenance of the annular open ditch 2, reducing maintenance difficulty, and improving the safety and convenience of system operation and maintenance.

[0039] In some embodiments, the grating is made of stainless steel.

[0040] By using stainless steel for the grating, it can resist the erosion of condensation and environmental moisture, is not easy to rust and corrode, extends its service life, and reduces the maintenance cost of frequent replacements. The high strength of stainless steel allows the grating to withstand the trampling of workers and the impact of light heavy objects without easily deforming or breaking. The smooth and easy-to-clean surface of stainless steel makes it difficult for debris and dirt to adhere to the grating, making cleaning convenient and preventing dirt accumulation from aggravating corrosion. At the same time, it maintains the transparency of the perforated structure and does not affect the observation of the drainage status in the open ditch.

[0041] In some embodiments, the width of the annular open ditch 2 is 300-500mm, and the depth of the annular open ditch 2 is 400-600mm.

[0042] By setting the width of the annular open ditch 2 to 300-500mm, it can fully adapt to the drainage flow of the bottom plate drain 5 and the submersible pump 7, avoiding drainage blockage caused by narrow ditch, while reserving enough operating space to facilitate dredging and maintenance by staff; by setting the depth to 400-600mm, the annular open ditch 2 has sufficient water accumulation buffer volume to cope with concentrated drainage in a short period of time and prevent water from overflowing and soaking surrounding equipment.

[0043] In some embodiments, the inner wall of the annular open ditch 2 is treated with cement mortar plaster.

[0044] By applying cement mortar to the inner wall of the annular open ditch 2, a dense and smooth protective layer is formed, effectively blocking the penetration of condensate water, preventing moisture erosion of the surrounding soil and equipment foundations, and ensuring site dryness and structural stability. The smooth surface reduces water flow resistance, facilitates smoother condensate drainage, and prevents the adhesion of dirt and debris, reducing the risk of siltation and blockage in the annular open ditch 2 and decreasing the frequency of dredging. The reinforcement effect of cement mortar increases the structural strength of the inner wall of the annular open ditch 2, making it less prone to damage from external impacts and long-term water erosion, extending the service life of the annular open ditch 2. At the same time, the surface treatment is simple to apply and has low maintenance costs.

[0045] Working principle of the invention: The condensate generated in the converter gas holder flows into the bottom plate drain 5 through the connecting pipe 3, then into the annular open ditch 2 through the first drain pipe 6, and finally into the wastewater station 12. When the water level in the second collection pit 10 rises to the high water level trigger height, the float switch 11 triggers the submersible pump 7 to start, draining the accumulated water into the annular open ditch 2, ensuring that the bottom plate drain 5 is not submerged; when the water level drops to the low water level trigger height, the float switch 11 controls the submersible pump 7 to stop working.

[0046] The main functions of this invention are: This invention features a first water collection pit and a bottom plate drain, paired with a deeper second water collection pit and a submersible sewage pump controlled by a float switch. This automatically drains accumulated water, effectively preventing the bottom plate drain from immersing and corroding, thus extending the equipment's service life. A circular open ditch centrally connects the bottom plate drain and the submersible sewage pump, allowing for timely detection of blockages and leaks, solving the problem of inconvenient inspection of traditional concealed pipes and facilitating smoother drainage. Covering the circular open ditch with a stainless steel grating prevents people from falling in and debris from entering and clogging the ditch, while still allowing for better observation.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A drainage system for the bottom plate of a converter gas holder, characterized in that: The system includes a first water collection pit located below the bottom plate of the converter gas holder. The first water collection pit contains a base, on which a bottom plate drainer is installed. The bottom plate drainer is connected to the bottom plate of the converter gas holder via a connecting pipe. A second water collection pit is located at the bottom of the first water collection pit. The second water collection pit contains a submersible pump and a float switch. The float switch is electrically connected to the submersible pump and is used to control the start and stop of the submersible pump according to the water level in the second water collection pit.

2. The converter gas holder bottom plate drainage system according to claim 1, characterized in that: The float switch is used to control the start and stop of the submersible sewage pump according to the water level in the second sump, including: if the water level in the second sump rises to the high water level trigger height, the float switch triggers the submersible sewage pump to start; if the water level in the second sump drops to the low water level trigger height, the float switch controls the submersible sewage pump to stop working.

3. The converter gas holder bottom plate drainage system according to claim 2, characterized in that: The high water level trigger height of the float switch is 100-150mm from the top of the second sump, and the low water level trigger height of the float switch is 50-80mm from the bottom of the second sump.

4. The converter gas holder bottom plate drainage system according to claim 1, characterized in that: There are four first water collection pits, which are evenly distributed below the bottom plate of the converter gas holder. The bottom plate drain in each first water collection pit is connected to the bottom plate of the converter gas holder through a connecting pipe.

5. The converter gas holder bottom plate drainage system according to claim 1, characterized in that: The depth of the first water collection pit is less than the depth of the second water collection pit.

6. The converter gas holder bottom plate drainage system according to claim 1, characterized in that: It also includes an annular open ditch, which is set around the bottom plate of the converter gas holder and the outlet of the annular open ditch is connected to the wastewater station. The bottom plate drain is connected to the annular open ditch through a first drain pipe, and the submersible sewage pump is connected to the annular open ditch through a second drain pipe.

7. A converter gas holder bottom plate drainage system according to claim 6, characterized in that: The annular open ditch is covered with a grating plate.

8. A converter gas holder bottom plate drainage system according to claim 7, characterized in that: The grating is made of stainless steel.

9. A converter gas holder bottom plate drainage system according to claim 6, characterized in that: The width of the annular open ditch is 300-500mm, and the depth of the annular open ditch is 400-600mm.

10. A converter gas holder bottom plate drainage system according to claim 6, characterized in that: The inner wall of the annular open ditch is treated with cement mortar plaster.

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