Slag discharging system
By using the wastewater generated by the boiler in the slag discharge system to form a second water seal, the problem of high costs resulting from the use of industrial water is solved, and effective water sealing and cost reduction are achieved.
Patent Information
- Application Number
- CN202420652866.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In thermal power plants, the slag discharge system uses industrial water to form a furnace bottom water seal, resulting in higher costs.
The wastewater generated by the boiler is collected in the aeration tank and transported to the slag retrieval chamber through the water pump and water pipes to form a second water seal to avoid the use of industrial water.
The use of industrial water by the second water seal is reduced, thereby reducing costs, and at the same time, an effective water seal at the connection of the hydraulic shutdown door and the slag retrieval machine case is achieved.
Smart Images
Figure CN222597757U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of engineering machinery, and specifically relates to a slag discharge system. Background Art
[0002] In a thermal power plant, boilers are generally divided into solid slag discharge and liquid slag discharge according to the different slag discharge forms. When the slag discharge form is solid slag discharge, the high-temperature slag ash falls from the transition slag well into a slag picker filled with water, so that the slag ash is granulated due to cooling. A hydraulic shut-off door is movably connected to the outlet of the transition slag well. A furnace bottom water seal needs to be formed at the connection between the hydraulic shut-off door and the slag picker to cool the high-temperature slag ash while preventing outside air from entering the boiler through the transition slag well and affecting the pressure in the boiler. In related technologies, the source of water for forming the furnace bottom water seal is industrial water. However, industrial water has a high water production cost, which leads to a high cost for forming the furnace bottom water seal. Utility Model Content
[0003] The purpose of the embodiments of the present application is to disclose a slag discharge system, which can solve the problem of high cost caused by using industrial water to form a furnace bottom water seal in the slag discharge system described in the background art.
[0004] In order to solve the above technical problems, this application is implemented as follows:
[0005] In a first aspect, the present application discloses a slag discharge system, which comprises a transition slag well, a hydraulic shut-off door, a slag scoop machine, an aeration tank, a first water pump and a first water pipe, wherein: the transition slag well is provided with a first slag discharge port, the hydraulic shut-off door is movably connected to the first slag discharge port, the slag scoop machine comprises a slag scoop machine casing, the first slag discharge port is opposite to the slag inlet port of the slag scoop machine casing, at least part of the hydraulic shut-off door is located in the slag scoop machine casing, one end of the first water pipe is connected to the aeration tank, and the other end of the first water pipe is connected to the slag scoop machine casing, the first water pump is arranged in the first water pipe, the first water pump is used to transport the wastewater in the aeration tank to the slag scoop machine casing through the first water pipe, and submerge at least part of the hydraulic shut-off door, and the wastewater forms a second water seal at the connection between the hydraulic shut-off door and the slag scoop machine casing.
[0006] The technical solution adopted in this application can achieve the following beneficial effects:
[0007] The slag discharge system disclosed in the embodiment of the present application is a technical improvement on the structure of the slag discharge system in the related art. The wastewater generated by the boiler in the process is collected in the aeration tank, and the wastewater in the aeration tank is transported to the slag scooping machine housing through the first water pump and the first water pipe, and a second water seal is formed at the connection between the slag scooping machine housing and the hydraulic shut-off door. Therefore, in the present application, the source of the water used for the second water seal is the wastewater stored in the aeration tank, not industrial water, so that the present application can reduce the cost of the second water seal for the use of industrial water. Therefore, the technical solution adopted in the present application can solve the problem of high cost caused by using industrial water to form the furnace bottom water seal in the slag discharge system described in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figures 1 to 3 They are respectively partial structural schematic diagrams of the slag discharge system disclosed in the embodiments of the present application.
[0009] Description of reference numerals:
[0010] 100-transition slag pit, 110-first slag discharge port, 120-water-cooled wall, 130-cold ash hopper;
[0011] 200-Hydraulic shut-off door;
[0012] 300-slag scavenger, 310-slag scavenger housing, 320-scraper chain, 321-horizontal section, 322-inclined section, 330-slag discharge pipe, 331-slag discharge main pipe, 332-first slag discharge branch pipe, 333-second slag discharge branch pipe;
[0013] 400- aeration tank;
[0014] 510 - first water pump, 520 - second water pump, 530 - third water pump;
[0015] 610 - first water pipe, 611 - first valve, 612 - second valve, 620 - second water pipe, 621 - second main water pipe, 622 - first branch water pipe, 623 - second branch water pipe, 624 - third branch water pipe, 630 - third water pipe;
[0016] 710-electric regulating valve, 720-first water return pipe, 730-three-way valve;
[0017] 810-slag water recovery pool, 820-industrial water pool;
[0018] 900-slag bin, 910-first slag bin, 920-second slag bin, 930-one-way conveyor. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0020] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.
[0021] The slag discharge system disclosed in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.
[0022] like Figures 1 to 3 As shown, an embodiment of the present application discloses a slag discharge system, which includes a transition slag well 100 , a hydraulic shut-off door 200 , a slag scoop 300 , an aeration tank 400 , a first water pump 510 and a first water pipe 610 .
[0023] The transition slag well 100 is a transition device for the boiler to discharge slag ash into the external environment. The transition slag well 100 and the boiler are connected by a mechanical seal to ensure that the boiler expands freely when heated. The transition slag well 100 is provided with a first slag discharge port 110, and the hydraulic shut-off door 200 is movably connected to the first slag discharge port 110. The hydraulic shut-off door 200 relies on a hydraulic cylinder to open and close the first slag discharge port 110. When the slag material handling equipment located downstream of the transition slag well 100 is overhauled, in this application, the slag scoop 300 is the slag material handling equipment downstream of the transition slag well 100, that is, when the slag scoop 300 is overhauled and temporarily unable to operate normally, the hydraulic shut-off door 200 can be closed, that is, the hydraulic shut-off door 200 can block the first slag discharge port 110. At this time, the slag ash discharged from the boiler temporarily falls onto the hydraulic shut-off door 200 through the transition slag well 100, so that the hydraulic shut-off door 200 in the closed state can play the storage function of slag ash in a short time.
[0024] The slag scraper 300 can cool and transport the high-temperature slag ash discharged from the boiler. The slag scraper 300 includes a slag scraper case 310. The first slag discharge port 110 is opposite to the slag inlet of the slag scraper case 310. At least part of the hydraulic shut-off door 200 is located in the slag scraper case 310, so that when the hydraulic shut-off door 200 is in an open state, in the vertical direction, at least part of the structure of the hydraulic shut-off door 200 can overlap with at least part of the structure of the slag scraper case 310.
[0025] One end of the first water pipe 610 is connected to the aeration tank 400, and the other end of the first water pipe 610 is connected to the slag removal machine housing 310. The first water pump 510 is provided in the first water pipe 610. The first water pump 510 is used to transport the wastewater in the aeration tank 400 to the slag removal machine housing 310 through the first water pipe 610, and submerge at least part of the hydraulic shut-off door 200. The wastewater forms a second water seal at the connection between the hydraulic shut-off door 200 and the slag removal machine housing 310. That is, the wastewater in the slag removal machine housing 310 submerges at least part of the hydraulic shut-off door 200, so that the connection between the slag removal machine housing 310 and the hydraulic shut-off door 200 is water-sealed by the wastewater, and the environment in the boiler is isolated from the environment outside the boiler by the wastewater. Compared with the related art, in which the source of water for the second water seal is industrial water, in the present application, the waste water generated in the boiler is collected in an aeration tank, and the waste water in the aeration tank is transported to the slag removal machine case 310 through the first water pump 510 and the first water pipe 610 to realize the second water seal, thereby reducing the amount of industrial water used in the second water seal in the present application, and further reducing the cost of using industrial water in the slag discharge system.
[0026] It should be noted that the wastewater in the aeration tank in the present application can be the discharge water in the absorption tower during the flue gas desulfurization process in the boiler. Of course, the source of the wastewater can also be the process generated in other processes in the boiler that does not affect the water seal effect. The source of the wastewater is not specifically restricted in the present application. Since the secondary water seal is formed at the bottom of the boiler, the secondary water seal in the present application is the furnace bottom water seal in the background technology.
[0027] The slag discharge system disclosed in the embodiment of the present application is a technical improvement on the structure of the slag discharge system in the related art. The wastewater generated by the boiler in the process is collected in the aeration tank 400, and the wastewater in the aeration tank 400 is transported to the slag scooping machine housing 310 through the first water pump 510 and the first water pipe 610, and a second water seal is formed at the connection between the slag scooping machine housing 310 and the hydraulic shut-off door 200. Therefore, in the present application, the source of the water used in the second water seal is the wastewater stored in the aeration tank 400, rather than industrial water, so that the present application can reduce the cost of the second water seal for the use of industrial water. Therefore, the technical solution adopted in the present application can solve the problem of high cost caused by using industrial water to form the furnace bottom water seal in the slag discharge system described in the background technology.
[0028] In the slag discharge system disclosed in the embodiment of the present application, the slag discharge system may further include a first valve 611 and a second valve 612 provided on the first water pipe 610, wherein the first valve 611 is located between the aeration tank 400 and the first water pump 510, and the second valve 612 is located between the first water pump 510 and the slag scooping machine housing 310. In this case, the first valve 611 can control the on-off between the aeration tank 400 and the first water pump 510, and the second valve 612 can control the on-off between the first water pump 510 and the slag scooping machine housing 310, so that the staff can control the first valve 611 and the second valve 612 to be in an open or closed state as needed.
[0029] Specifically, when a fault occurs in the aeration tank 400 and needs to be repaired, the first valve 611 can be set to a closed state; similarly, when a fault occurs in the first water pump 510 and needs to be repaired, the second valve 612 can be set to a closed state. Of course, when the first aeration tank 400 and the first water pump 510 can both operate normally, the first valve 611 and the second valve 612 can be set to an open state, that is, in a non-maintenance state, the first valve 611 and the second valve 612 are normally open valves, which is conducive to reducing the workload of the staff to operate the first valve 611 and the second valve 612 to switch the working state.
[0030] Optionally, when the first valve 611 and the second valve 612 are normally open valves, the first valve 611 and the second valve 612 can be manual valves, which is beneficial to saving costs; or, in order to improve the convenience of controlling the first valve 611 and the second valve 612, the first valve 611 and the second valve 612 can be set as electric valves.
[0031] In the present application, if the actual water level of the second water seal is low, the slag scooping machine housing 310 and the hydraulic shut-off door 200 cannot be sealed by the slag washing water in the slag scooping machine housing 310, which causes the air in the external environment to enter the boiler through the hydraulic shut-off door 200, which has an adverse effect on the pressure environment in the boiler. If the actual water level of the second water seal is high, too much water will overflow from the edge of the slag scooping machine housing 310, resulting in a waste of slag washing water. In other words, in order to avoid the actual water level of the second water seal from having an adverse effect on the boiler or causing a waste of slag washing water, the actual water level of the second water seal needs to be set within a preset water level range.
[0032] In an optional technical solution, the slag discharge system may further include an electric regulating valve 710, a water level detector and a controller. The electric regulating valve 710 is arranged on the first water pipe 610 and is located between the second valve 612 and the slag scooping machine housing 310. The electric regulating valve 710 and the water level detector are both electrically connected to the controller. The water level detector is used to detect the actual water level of the second water seal. When the water level detector detects that the actual water level of the second water seal is less than or equal to the first preset water level, the controller controls the electric regulating valve 710 to open. When the water level detector detects that the actual height of the second water seal is greater than the second preset water level, the controller controls the electric regulating valve 710 to close, and the second preset water level is greater than the first preset water level. In this case, through the cooperation between the electric regulating valve 710, the water level detector and the controller, the working state of the electric regulating valve 710 can be remotely controlled, that is, the electric regulating valve 710 can be switched between the open state and the working state, which is conducive to the purpose of automatically replenishing water to the second water seal and automatically stopping replenishing water through the electric regulating valve 710.
[0033] In the slag discharge system disclosed in the embodiment of the present application, the slag discharge system may further include a slag water recovery pool 810 and a first water return pipe 720, one end of the first water return pipe 720 is connected to the slag water recovery pool 810, the other end of the first water return pipe 720 is connected to the slag scooping machine housing 310, and the height of the position where the first water return pipe 720 is connected to the slag scooping machine housing 310 is the second preset water level. In this case, when the actual water level in the slag scooping machine housing 310 is greater than or equal to the second preset water level, the slag washing water in the slag scooping machine housing 310 will overflow into the slag water recovery pool 810 through the first water return pipe 720, thereby realizing the collection and storage of the slag washing water overflowing from the slag scooping machine housing 310 to avoid waste.
[0034] In order to realize the recycling of slag washing water in the slag water recovery pool 810, optionally, the slag discharge system may also include a third water pump 530 and a third water pipe 630, one end of the third water pipe 630 is connected to the slag water recovery pool 810, and the other end of the third water pipe 630 is connected to the slag scooping machine case 310, the third water pump 530 is arranged on the third water pipe 630, the third water pump 530 is used to transport the slag washing water in the slag water recovery pool 810 to the slag scooping machine case 310 through the third water pipe 630, and the second preset water level height is greater than the height of the connection between the third water pipe 630 and the slag scooping machine case 310. In this case, when the actual water level in the slag scooping machine housing 310 is low, that is, when the actual water level in the slag scooping machine housing 310 is less than or equal to the first preset water level, the third water pump 530 can drive the slag washing water in the slag water recovery pool 810 to be replenished into the slag scooping machine housing 310, so as to realize the recycling of the slag washing water in the slag water recovery pool 810. In addition, in order to improve the efficiency of replenishing water in the slag water recovery pool 810 to the slag scooping machine housing 310, the number of the third water pipe 630 and the third water pump 530 can be multiple, and each third water pipe 630 is arranged in a one-to-one correspondence with each third water pump 530.
[0035] In the slag discharge system disclosed in the embodiment of the present application, the transition slag well 100 may further include a cold ash hopper 130, the outlet of the cold ash hopper 130 is a first slag discharge port 110, the hydraulic shut-off door 200 includes a box body and a door panel that are movably connected, at least a portion of the door panel can extend into the slag scoop machine box body 310, an annular water trough is provided at one end of the box body close to the cold ash hopper 130, and one end of the cold ash hopper 130 is plugged into the annular water trough. The slag discharge system may further include an industrial water pool 820, a second water pump 520 and a second water pipe 620, one end of the second water pipe 620 is connected to the industrial water pool 820, and the other end of the second water pipe 620 is connected to the annular water trough, the second water pump 520 is arranged in the second water pipe 620, and the second water pump 520 is used to transport the industrial water in the industrial water pool 820 to the annular water trough through the second water pipe 620, and the industrial water in the annular water trough forms a first water seal at the connection between the cold ash hopper 130 and the box body.
[0036] In the above technical solution, the second water pump 520 can drive the industrial water in the industrial water pool 820 to be transported to the annular water tank. Since the annular water tank is the connection between the cold ash hopper 130 and the hydraulic shut-off door 200, the industrial water in the annular water tank can form a first water seal at the connection between the cold ash hopper 130 and the hydraulic shut-off door 200, which is used to prevent the air in the external environment from entering the boiler through the connection between the cold ash hopper 130 and the hydraulic shut-off door 200 and causing adverse effects on the pressure environment in the boiler.
[0037] At the same time, the ash in the boiler has a relatively high temperature. In order to cool the high-temperature ash, the transition slag shaft 100 may also include a water-cooled wall 120 disposed at one end of the cold ash hopper 130 away from the hydraulic shut-off door 200. The water-cooled wall 120 can absorb the heat of the high-temperature ash, thereby facilitating cooling of the high-temperature ash.
[0038] In the present application, the wastewater in the aeration tank 400 is desulfurized wastewater as an example. The desulfurized wastewater contains a high concentration of chloride ions, which makes the pH of the desulfurized wastewater acidic, which may cause corrosion to the water-cooled wall 120. Although the desulfurized wastewater is contained in the slag scooping machine housing 310 in the present application, the distance between the slag scooping machine housing 310 and the water-cooled wall 120 is relatively far, so the use of the desulfurized wastewater will not cause corrosion to the water-cooled wall 120. Compared with the slag scooping machine housing 310, the distance between the annular water tank and the water-cooled wall 120 is relatively close. Therefore, in the present application, non-corrosive industrial water is introduced into the annular water tank to avoid corrosion to the water-cooled wall 120.
[0039] In an optional technical solution, the second water pipe 620 may include a second main water pipe 621 and a first branch water pipe 622 and a second branch water pipe 623 connected to the second main water pipe 621. The second water pump 520 is arranged on the second main water pipe 621. The first branch water pipe 622 and the second branch water pipe 623 are both provided with switch valves. The end of the first branch water pipe 622 away from the second main water pipe 621 is connected to the annular water trough, and the end of the second branch water pipe 623 away from the second main water pipe 621 is connected to the slag scavenging machine casing 310. In this case, the industrial water in the industrial water pool 820 can be transported to the annular water tank through the first water pipe 622, and can also be transported to the slag removal machine case 310 through the second water pipe 623. When a failure occurs in the aeration water pool 400 and water cannot be replenished in time to the slag removal machine case 310, the staff can transport the industrial water in the industrial water pool 820 to the slag removal machine case 310 through the second water pump 520, so as to ensure the sealing effect of the second water seal on the connection between the hydraulic shut-off door 200 and the slag removal machine case 310 and the cooling effect on the high-temperature slag ash.
[0040] In the slag discharge system disclosed in the embodiment of the present application, the slag discharge system may further include a slag bin 900, and the slag picker 300 may further include a scraper chain 320, the scraper chain 320 is movably connected to the bottom of the slag picker housing 310, and the scraper chain 320 is used to scrape the slag in the slag picker housing 310 to the slag bin 900. In this case, the scraper chain 320 includes a chain that can move relative to the slag picker housing 310 and a scraper connected to the chain, so that the chain can drive the scraper to move relative to the bottom of the slag picker housing 310, so that the scraper chain 320 can scrape the slag deposited in the slag picker housing 310 to the slag bin 900, and the slag bin 900 can store the slag. When the slag in the slag bin 900 is stored to a preset amount, the staff can open the discharge port of the slag bin to discharge the slag to the truck, so that the truck can transport the slag in the sales process.
[0041] The scraper chain 320 carries a large amount of slag washing water on the slag material scraped from the slag scooping machine housing 310, making it difficult to transport and store the slag material. In order to dehydrate the slag material carrying a large amount of slag washing water, in an optional technical solution, the scraper chain 320 may include a connected horizontal section 321 and an inclined section 322, the horizontal section 321 is connected to the slag scooping machine housing 310, and the horizontal height of the end of the inclined section 322 away from the horizontal section 321 is greater than the horizontal height of the horizontal section 321. In this case, when the slag material is transported to the inclined section 322, the large amount of slag washing water contained in the slag material will automatically seep out due to gravity, and the automatically seeped slag washing water will return to the slag scooping machine housing 310 along the inclined section 322 and the horizontal section 321 to realize the recycling of the slag washing water.
[0042] After a long period of use, the scrapers in the scraper chain 320 may be adhered to the sticky slag, and the scrapers with slag attached to them will affect the scraper's efficiency in scraping the slag in the slag removal machine case 310. Therefore, in an optional technical solution, the second water pipe 620 may also include a third branch water pipe 624 connected to the second main water pipe 621, and the outlet of the third branch water pipe 624 at one end away from the second main water pipe 621 is directed toward the scraper on the inclined section 322, so that the industrial water in the third branch water pipe 624 can flush the scraper running on the inclined section 322, thereby flushing away the slag attached to the scraper, thereby preventing the slag attached to the scraper from having an adverse effect on the subsequent scraping efficiency of the scraper.
[0043] In the slag discharge system disclosed in the embodiment of the present application, the slag scoop 300 may further include a slag discharge pipe 330, which may include a slag discharge main pipe 331 and a plurality of slag discharge branch pipes respectively connected to the slag discharge main pipe 331, the inlet of the slag discharge main pipe 331 is opposite to the outlet of the scraper chain 320, the number of slag bins 900 is multiple, and the outlets of the plurality of slag discharge branch pipes are respectively opposite to the openings of the plurality of slag bins 900. In this case, the staff can discharge the slag into the plurality of slag bins through the plurality of slag discharge branch pipes respectively, so as to realize the storage of a large amount of slag. Of course, each slag discharge branch pipe and the corresponding slag bin 900 form a storage unit, and the staff can also discharge the slag into the plurality of storage units alternately, so that the scraper chain 320 can continuously discharge the slag into the storage unit, so as to avoid suspending the transportation of the slag by the scraper chain 320 when the storage unit cannot continue to store the slag, which may cause an adverse effect on the slag discharge efficiency of the entire slag discharge system.
[0044] In order to avoid wasting equipment by setting up too many storage units, in an optional technical solution, the number of slag bins 900 can be two, the two slag bins 900 include a first slag bin 910 and a second slag bin 920, the slag discharge branch pipe can include a first slag discharge branch pipe 332 and a second slag discharge branch pipe 333, the outlet of the first slag discharge branch pipe 332 is opposite to the first slag bin 910, the slag discharge system can also include a one-way conveyor 930, the material receiving end of the one-way conveyor 930 is opposite to the outlet of the second slag discharge branch pipe 333, and the material discharge end of the one-way conveyor 930 is opposite to the second slag bin 920, and the slag discharge pipeline can also include a three-way valve 730, which is arranged at the connection point between the slag discharge main pipe and the first slag discharge branch pipe 332 and the second slag discharge branch pipe 333. In this case, the first slag discharge branch pipe 332 and the first slag bin 910 form a first material storage unit, and the second slag discharge branch pipe 333, the one-way conveyor 930 and the second slag bin 920 form a second material storage unit. The staff can realize the connection between the slag discharge main pipe 331 and the first slag discharge branch pipe 332 through the three-way valve 730, or realize the connection between the slag discharge main pipe 331 and the second slag discharge branch pipe 333, so that the staff can realize the coordination of the scraper chain 320 with the first material storage unit or the second material storage unit through the three-way valve 730, that is, in this application, the scraper chain 320 can be continuously operated by alternating the use of the first slag bin 910 and the second slag bin 920.
[0045] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0046] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.
Claims
1. A slag discharge system, characterized in that: The invention comprises a transition slag pit (100), a hydraulic shut-off door (200), a slag scooping machine (300), an aeration tank (400), a first water pump (510) and a first water pipe (610), wherein: The transition slag well (100) is provided with a first slag discharge port (110), the hydraulic shut-off door (200) is movably connected to the first slag discharge port (110), the slag scooping machine (300) comprises a slag scooping machine casing (310), the first slag discharge port (110) is opposite to a slag inlet of the slag scooping machine casing (310), and at least a portion of the hydraulic shut-off door (200) is located in the slag scooping machine casing (310). One end of the first water pipe (610) is in communication with the aeration tank (400), and the other end of the first water pipe (610) is in communication with the slag scooping machine housing (310). The first water pump (510) is disposed on the first water pipe (610). The first water pump (510) is used to transport wastewater in the aeration tank (400) to the slag scooping machine housing (310) through the first water pipe (610) and to submerge at least part of the hydraulic shut-off door (200). The wastewater forms a second water seal at the connection between the hydraulic shut-off door (200) and the slag scooping machine housing (310).
2. The slag discharge system according to claim 1, characterized in that: The slag discharge system further comprises a first valve (611) and a second valve (612) provided on the first water pipe (610), wherein the first valve (611) is located between the aeration tank (400) and the first water pump (510), and the second valve (612) is located between the first water pump (510) and the slag scooping machine casing (310).
3. The slag discharge system according to claim 2, characterized in that: The slag discharge system further comprises an electric regulating valve (710), a water level detector and a controller, wherein the electric regulating valve (710) is arranged on the first water pipe (610) and is located between the second valve (612) and the slag scooping machine housing (310); The electric regulating valve (710) and the water level detector are both electrically connected to the controller, the water level detector is used to detect the actual water level height of the second water seal, and when the water level detector detects that the actual water level height of the second water seal is less than or equal to the first preset water level height, the controller controls the electric regulating valve (710) to open; When the water level detector detects that the actual height of the second water seal is greater than the second preset water level, the controller controls the electric regulating valve (710) to close, and the second preset water level is greater than the first preset water level.
4. The slag discharge system according to claim 3, characterized in that: The slag material discharge system further comprises a slag water recovery tank (810), a first water return pipe (720), a third water pump (530) and a third water pipe (630), one end of the first water return pipe (720) is connected to the slag water recovery tank (810), the other end of the first water return pipe (720) is connected to the slag scooping machine casing (310), and the height of the position where the first water return pipe (720) is connected to the slag scooping machine casing (310) is the second preset water level height; One end of the third water pipe (630) is in communication with the slag water recovery pool (810), and the other end of the third water pipe (630) is in communication with the slag scooping machine housing (310). The third water pump (530) is disposed on the third water pipe (630), and the third water pump (530) is used to transport the slag washing water in the slag water recovery pool (810) to the slag scooping machine housing (310) through the third water pipe (630); The second preset water level is greater than the height of the connection between the third water pipe (630) and the slag scooping machine casing (310).
5. The slag discharge system according to claim 1, characterized in that: The transition slag pit (100) further comprises a cold ash hopper (130), the outlet of the cold ash hopper (130) being the first slag discharge port (110), the hydraulic shut-off door (200) comprising a box body and a door panel movably connected, at least a portion of the door panel being able to extend into the slag scooping machine box body (310), an annular water trough being provided at one end of the box body close to the cold ash hopper (130), one end of the cold ash hopper (130) being plug-fitted into the annular water trough, The slag discharge system also includes an industrial water pool (820), a second water pump (520) and a second water pipe (620), one end of the second water pipe (620) is connected to the industrial water pool (820), and the other end of the second water pipe (620) is connected to the annular water tank. The second water pump (520) is arranged on the second water pipe (620), and the second water pump (520) is used to transport the industrial water in the industrial water pool (820) to the annular water tank through the second water pipe (620). The industrial water in the annular water tank forms a first water seal at the connection between the cold ash hopper (130) and the box body.
6. The slag discharge system according to claim 5, characterized in that: The second water pipe (620) comprises a second main water pipe (621) and a first branch water pipe (622) and a second branch water pipe (623) connected to the second main water pipe (621); the second water pump (520) is arranged on the second main water pipe (621); the first branch water pipe (622) and the second branch water pipe (623) are both provided with switch valves; one end of the first branch water pipe (622) away from the second main water pipe (621) is connected to the annular water trough; and one end of the second branch water pipe (623) away from the second main water pipe (621) is connected to the slag scooping machine casing (310).
7. The slag discharge system according to claim 1, characterized in that: The slag discharge system further comprises a slag bin (900), and the slag scooping machine (300) further comprises a scraper chain (320), wherein the scraper chain (320) is movably connected to the bottom of the slag scooping machine casing (310), and the scraper chain (320) is used to scrape the slag in the slag scooping machine casing (310) into the slag bin (900).
8. The slag discharge system according to claim 7, characterized in that: The scraper chain (320) comprises a connected horizontal section (321) and an inclined section (322); the horizontal section (321) is connected to the slag removal machine housing (310); and the horizontal height of one end of the inclined section (322) away from the horizontal section (321) is greater than the horizontal height of the horizontal section (321).
9. The slag discharge system according to claim 8, characterized in that: The slag scooping machine (300) further comprises a slag discharge pipe (330), wherein the slag discharge pipe (330) comprises a slag discharge main pipe (331) and a plurality of slag discharge branch pipes respectively connected to the slag discharge main pipe (331), wherein the inlet of the slag discharge main pipe (331) is opposite to the outlet of the scraper chain (320), and the number of the slag bins (900) is multiple, and the outlets of the multiple slag discharge branch pipes are respectively opposite to the openings of the multiple slag bins (900).
10. The slag discharge system according to claim 9, characterized in that: The number of the slag bins (900) is two, the slag bins (900) include a first slag bin (910) and a second slag bin (920), the slag discharge branch pipe includes a first slag discharge branch pipe (332) and a second slag discharge branch pipe (333), the outlet of the first slag discharge branch pipe (332) is opposite to the first slag bin (910), The slag material discharge system further comprises a one-way conveyor (930), wherein a receiving end of the one-way conveyor (930) is opposite to an outlet of the second slag discharge branch pipe (333), and a discharging end of the one-way conveyor (930) is opposite to the second slag bin (920). The slag discharge pipeline comprises a three-way valve (730), and the three-way valve (730) is arranged at the connection point between the slag discharge main pipe (331) and the first slag discharge branch pipe (332) and the second slag discharge branch pipe (333).