Dry slag discharger for coal-fired power plant

Abstract

The present invention relates to a dry slag discharger for a coal-fired power plant. The dry slag discharger comprises: a steel belt conveyor, a cleaning chain and a spraying unit, wherein a first transition section is provided in the middle of the steel belt conveyor, and a first climbing section is provided at one end of the steel belt conveyor and is used for conveying slag discharged from a boiler into a slag collecting hopper, a slag well or a slag crusher. The whole cleaning chain is arranged below the steel belt conveyor, a second transition section is provided in the middle of the cleaning chain, and a second climbing section is provided at the end of the cleaning chain close to the first climbing section and is used for conveying ash falling from the steel belt conveyor onto the cleaning chain into the slag collecting hopper, the slag well or the slag crusher. The spraying unit is arranged between the first transition section and the second transition section and between the first climbing section and the second climbing section, and can generate fog droplets. The fog droplets are combined with rising ash, thereby increasing the weight of the ash. When the volume of air flowing into an air inlet is too large, fine ash located on a climbing section of the cleaning chain will no longer be suctioned back to a horizontal section of the cleaning chain, thereby avoiding excessive ash accumulation in a local area of the cleaning chain, solving the problem of ash return, and improving the operating load capacity of the dry slag discharger.

Description

Coal-fired power plant dry slag discharger Technical Field

[0001] The present invention relates to the technical field of dry-type slag dischargers, and in particular to a dry-type slag discharger for a coal-fired power plant. Background Art

[0002] A dry slag conveyor, installed below the boiler's bottom slag discharge system, primarily utilizes a steel belt to transport and cool hot slag. This eliminates the need for a slag water treatment system and reduces environmental pollution. Existing dry slag conveyors consist of a steel belt conveyor and a sweeping chain, each with a horizontal section, a transition section, and a climbing section with a specific slope. The steel belt conveyor and sweeping chain are housed within a housing. The steel belt conveyor transports boiler slag to a slag collection hopper, slag pit, or slag crusher. The sweeping chain is installed below the steel belt conveyor. A portion of the ash falls from the steel belt conveyor onto the sweeping chain, which then conveys this portion of ash to the slag collection hopper, slag pit, or slag crusher. The housing has a horizontal section at one end, a transition section in the middle, and a climbing section at the other end. Air inlets are located at the end of the horizontal section facing away from the transition section and at the end of the climbing section facing away from the transition section. These inlets draw cold air to cool the steel belt conveyor's slag.

[0003] As the demand for cost reduction increases, the quality of incoming coal gradually decreases, and the sulfur content in the coal increases. During periods of high boiler load, coal consumption increases, coking in the furnace intensifies, the amount of slag dropping significantly increases, and the carrying load of the dry slag discharger also increases. Due to the increase in slag dropping and the limited driving force of the drive motor, the number of scrapers on the cleaning chain cannot be increased indefinitely. Furthermore, due to the actual operating space of the cleaning chain, the height of the scrapers on the cleaning chain cannot be increased. When the air volume flowing into the air inlet is too large, the fine ash on the climbing section of the cleaning chain is affected by the negative pressure in the furnace, resulting in a phenomenon similar to a sandstorm. These fine ashes will be drawn back to the horizontal section of the cleaning chain and form hilly deposits, causing excessive localized ash accumulation on the cleaning chain, which can easily block the rotating parts of the cleaning chain, lift up the transmission chains, derail them, and ultimately force the equipment to stop operating.

[0004] Therefore, how to prevent the fine dust on the climbing section of the cleaning chain from being drawn back to the horizontal section of the cleaning chain when the air volume flowing into the air inlet is too large has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In order to solve the problem that when the air volume flowing into the air inlet is too large, the fine ash on the climbing section of the cleaning chain is easily drawn back to the horizontal section of the cleaning chain due to the negative pressure in the furnace, the present invention provides a dry slag discharger for a coal-fired power plant.

[0006] To achieve the purpose of the present invention, a dry slag discharger for a coal-fired power plant is provided, comprising:

[0007] The steel belt conveyor has a first transition section in the middle and a first climbing section at one end;

[0008] The cleaning chain is arranged as a whole below the steel belt conveyor, with a second transition section in the middle and a second climbing section at one end close to the first climbing section;

[0009] The spray unit is arranged between the first transition section and the second transition section and between the first climbing section and the second climbing section, and can generate mist droplets.

[0010] In some specific embodiments, the spray unit includes:

[0011] A lower spray section, disposed between the first transition section and the second transition section, capable of generating mist droplets;

[0012] The middle spray section is provided between an end of the first climbing section close to the first transition section and an end of the second climbing section close to the second transition section, and is also capable of generating mist droplets;

[0013] The upper spray portion is arranged between an end of the first climbing section away from the first transition section and an end of the second climbing section away from the second transition section, and can also generate mist droplets.

[0014] In some specific embodiments, the lower spray portion includes:

[0015] The axis of the liquid delivery pipe is perpendicular to the length direction of the steel belt conveyor;

[0016] There are multiple atomizing nozzles, which are evenly fixed on the infusion tube along the axial direction of the infusion tube;

[0017] The structure of the lower spray portion is the same as that of the middle spray portion and the structure of the upper spray portion.

[0018] In some specific embodiments, the axis of each atomizing nozzle is arranged horizontally.

[0019] In some specific embodiments, the axial distance between each two adjacent atomizing nozzles is 20 cm-50 cm;

[0020] The axial distance between the infusion pipe of the lower spray part and the infusion pipe of the middle spray part is 50cm-100cm; the axial distance between the infusion pipe of the middle spray part and the infusion pipe of the upper spray part is 50cm-100cm.

[0021] In some specific embodiments, it also includes:

[0022] Liquid storage cylinder, used to store water;

[0023] The pump is respectively connected with the liquid storage cylinder, the liquid infusion pipe of the lower spray part, the liquid infusion pipe of the middle spray part and the liquid infusion pipe of the upper spray part.

[0024] In some specific embodiments, the first transition section includes an upper steel belt transition section and a lower steel belt transition section; the second transition section includes an upper sweeper chain transition section and a lower sweeper chain transition section;

[0025] Also includes:

[0026] There are two first rollers, which are rotatably arranged below the upper steel belt transition section and the lower steel belt transition section respectively, and the side walls of the first rollers are respectively in contact with the bottom surface of the upper steel belt transition section and the bottom surface of the lower steel belt transition section;

[0027] There are two second rollers, which are rotatably arranged below the upper cleaning chain transition section and the lower cleaning chain transition section respectively, and their side walls are respectively in contact with the bottom surface of the upper cleaning chain transition section and the bottom surface of the lower cleaning chain transition section.

[0028] In some specific embodiments, it also includes:

[0029] There are two first pressing rollers, which are rotatably arranged above the upper steel strip transition section and above the lower steel strip transition section, and whose side walls are respectively in contact with the top surface of the upper steel strip transition section and the top surface of the lower steel strip transition section;

[0030] There are two second pressure rollers, which are rotatably arranged above the upper cleaning chain transition section and the lower cleaning chain transition section, and their side walls are respectively in contact with the top surface of the upper cleaning chain transition section and the top surface of the lower cleaning chain transition section.

[0031] In some specific embodiments, it also includes:

[0032] There are two deviation-correcting wheels, which are rotatably arranged on opposite sides of the steel belt conveyor, and the side walls thereof are respectively in contact with the opposite side edges of the steel belt conveyor.

[0033] In some specific embodiments, it also includes:

[0034] The box body is provided with a horizontal box section at one end, a transition box section in the middle, and a climbing box section at the other end; an air inlet is provided at the end of the horizontal box section away from the transition box section and at the end of the climbing box section away from the transition box section respectively;

[0035] The first transition section of the steel belt conveyor and the second transition section of the cleaning chain are arranged in the transition box section;

[0036] The first climbing section of the steel belt conveyor and the second climbing section of the cleaning chain are arranged in the climbing box section;

[0037] The opposite ends of the liquid delivery pipe of the lower spray part are detachably connected to the opposite sides of the transition box section respectively;

[0038] The opposite ends of the liquid infusion pipe of the middle spray part are detachably connected to the opposite sides of the climbing box section respectively;

[0039] The opposite ends of the liquid infusion pipe of the upper spray part are detachably connected to the opposite two sides of the climbing box section.

[0040] Beneficial effects of the present invention: The dry slag discharger of the coal-fired power plant of the present invention is provided with a steel belt conveyor, which is used to transport the slag discharged from the boiler to a slag collecting hopper, a slag pit or a slag crusher. The cleaning chain is used to transport the ash that has fallen from the steel belt conveyor to the cleaning chain to a slag collecting hopper, a slag pit or a slag crusher. The spray unit is provided between the first transition section and the second transition section and between the first climbing section and the second climbing section, and is capable of generating droplets. The droplets combine with the rising ash to increase the weight of the ash. When the air volume flowing into the air inlet is too large, the fine ash on the climbing section of the cleaning chain is affected by the negative pressure in the furnace and will no longer be drawn back to the horizontal section of the cleaning chain, thereby avoiding excessive local ash accumulation on the cleaning chain, solving the ash return problem, and improving the operating load capacity of the dry slag discharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic structural diagram of some specific embodiments of a dry-type slag discharger for a coal-fired power plant according to the present invention;

[0042] FIG2 is a schematic structural diagram of some specific embodiments of the spray unit in the dry slag discharger of the coal-fired power plant shown in FIG1 .

[0043] In the accompanying drawings, 110, steel belt conveyor; 120, cleaning chain; 130, spray unit; 131, lower spray part; 1311, infusion pipe; 1312, atomizing nozzle; 132, middle spray part; 133, upper spray part; 140, liquid storage cylinder; 150, pump; 161, first roller; 162, second roller; 171, first pressure roller; 172, second pressure roller; 181, horizontal box section; 182, transition box section; 183, climbing box section. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “top”, “bottom”, “inside”, “outside”, “axis”, and “circumferential” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0048] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," "fixed," "joined," and "hinge" should be understood in a broad sense. For example, these terms may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0049] As mentioned in the background technology, due to the increase in the amount of slag falling and the limited driving force of the drive motor, it is impossible to increase the number of scrapers on the cleaning chain indefinitely. Moreover, due to the actual operating space of the cleaning chain, the height of the scrapers on the cleaning chain cannot be increased. When the air volume flowing into the air inlet is too large, the fine ash on the climbing section of the cleaning chain is affected by the negative pressure in the furnace, resulting in a phenomenon similar to a sandstorm. These fine ash will be drawn back to the horizontal section of the cleaning chain and form a hilly deposition, causing excessive dust accumulation in some parts of the cleaning chain, which can easily block the rotating parts of the cleaning chain, lift up the transmission chains, derail them, and eventually force the equipment to stop operating.

[0050] To address the aforementioned issues, a dry slag discharger for a coal-fired power plant is provided, with reference to Figures 1 and 2. The dry slag discharger comprises a steel belt conveyor 110, a cleaning chain 120, and a spray unit 130. The steel belt conveyor 110 has a first transition section in the middle and a first ascending section at one end, which are used to convey slag discharged from the boiler to a slag hopper, slag pit, or slag crusher. The cleaning chain 120 is positioned entirely below the steel belt conveyor 110. It has a second transition section in the middle and a second ascending section at one end near the first ascending section, which is used to convey ash that has fallen from the steel belt conveyor 110 onto the cleaning chain 120 to the slag hopper, slag pit, or slag crusher. It should be noted that the slope angle of the first ascending section is greater than that of the second ascending section. The spray unit 130 is located between the first and second transition sections, and between the first and second ascending sections, and is capable of generating mist droplets. The mist droplets combine with the rising ash, increasing its weight. When the air volume flowing into the air inlet is too large, the fine ash on the climbing section of the cleaning chain 120 will be affected by the negative pressure in the furnace and will no longer be drawn back to the horizontal section of the cleaning chain 120, thereby avoiding excessive ash accumulation in the local area of ​​the cleaning chain 120, solving the ash return problem, and improving the operating load capacity of the dry slag discharger.

[0051] Specifically, in the exemplary embodiment, the spray unit 130 includes a lower spray portion 131, a middle spray portion 132, and an upper spray portion 133. The lower spray portion 131 is located between the first transition section and the second transition section and is capable of generating mist droplets that act on the ash rising from the second transition section. The middle spray portion 132 is located between the end of the first climbing section near the first transition section and the end of the second climbing section near the second transition section and is capable of generating mist droplets that act on the ash rising from the end of the second climbing section near the second transition section. The upper spray portion 133 is located between the end of the first climbing section away from the first transition section and the end of the second climbing section away from the second transition section and is also capable of generating mist droplets that act on the ash rising from the end of the second climbing section away from the second transition section. The layered formation of the mist droplets significantly improves the weighting effect on the ash, thereby preventing fine ash on the climbing section of the cleaning chain 120 from being drawn back to the horizontal section of the cleaning chain 120. Preferably, the lower spray section 131 includes a liquid delivery tube 1311 and atomizing nozzles 1312. The axis of the liquid delivery tube 1311 is perpendicular to the length of the steel strip conveyor 110. There are three to six atomizing nozzles 1312, evenly fixed to the liquid delivery tube 1311 along its axial direction. The structure of the lower spray section 131 is identical to that of the middle spray section 132 and the upper spray section 133. It should be noted that the atomizing nozzles 1312 can be rotatable 360°.

[0052] Preferably, in this exemplary embodiment, the axis of each atomizing nozzle 1312 is horizontally arranged. The distance between the axes of two adjacent atomizing nozzles 1312 is 20-50 cm. The distance between the liquid delivery tube 1311 of the lower spray section 131 and the liquid delivery tube 1311 of the middle spray section 132 is 50-100 cm; and the distance between the liquid delivery tube 1311 of the middle spray section 132 and the liquid delivery tube 1311 of the upper spray section 133 is 50-100 cm. This ensures that the weight of the ash is increased.

[0053] Preferably, in the exemplary embodiment, the dry slag discharger of a coal-fired power plant further includes a liquid reservoir 140, a pump 150, a temperature sensor, and a processor. The liquid reservoir 140 is used to store water. The pump 150 is fixed to the housing and is connected to the interior of the liquid reservoir 140, one end of the liquid infusion pipe 1311 of the lower spray section 131, one end of the liquid infusion pipe 1311 of the middle spray section 132, and one end of the liquid infusion pipe 1311 of the upper spray section 133 via hoses. This allows water to be delivered to the liquid infusion pipes 1311 of the lower spray section 131, the liquid infusion pipe 1311 of the middle spray section 132, and the liquid infusion pipe 1311 of the upper spray section 133. It should be noted that a hose can also be used to directly connect the on-site boiler, the pump 150, and the spray section, making water collection more convenient. A humidity sensor is mounted on the inner wall of the climbing box section 183 and is capable of detecting the humidity of the ash on the second climbing section of the cleaning chain 120 and transmitting the detected humidity value to the processor. The processor is electrically connected to the humidity sensor and pump 150, respectively. It compares the received humidity value with a preset humidity value and, based on the comparison result, sends a spray command to pump 150. Pump 150 intermittently delivers water to the liquid delivery tube 1311 of the lower spray section 131, the liquid delivery tube 1311 of the middle spray section 132, and the liquid delivery tube 1311 of the upper spray section 133 according to the spray command, with each delivery lasting 2-10 seconds. This ensures that the humidity of the ash on the second ascending section of the cleaning chain 120 is moderate, not too high to render it liquid. The ash also remains compacted, preventing it from clogging the subsequent production equipment.

[0054] Specifically, in the exemplary embodiment, the first transition section includes an upper steel belt transition section and a lower steel belt transition section. The second transition section includes an upper cleaning chain 120 transition section and a lower cleaning chain 120 transition section. The dry slag discharger of a coal-fired power plant also includes two first rollers 161, two second rollers 162, two first pressure rollers 171, two second pressure rollers 172, and two correcting wheels. The two first rollers 161 are rotatably disposed below the upper steel belt transition section and below the lower steel belt transition section, and their side walls respectively abut against the bottom surface of the upper steel belt transition section and the bottom surface of the lower steel belt transition section, for supporting the load-bearing steel belt. The two second rollers 162 are rotatably disposed below the upper cleaning chain 120 transition section and below the lower cleaning chain 120 transition section, and their side walls respectively abut against the bottom surface of the upper cleaning chain 120 transition section and the bottom surface of the lower cleaning chain 120 transition section, for supporting the load-bearing cleaning chain 120. The two first pressure rollers 171 are rotatably mounted above the upper and lower steel strip transition sections, respectively, and their side walls abut against the top surfaces of the upper and lower steel strip transition sections, respectively, to redirect the conveying direction of the steel strip. The two second pressure rollers 172 are rotatably mounted above the upper and lower sweeping chain transition sections, respectively, and their side walls abut against the top surfaces of the upper and lower sweeping chain transition sections, respectively, to redirect the conveying direction of the sweeping chain 120. The two deviation correction wheels are rotatably mounted on opposite sides of the steel strip conveyor 110, and their side walls abut against the opposite side edges of the steel strip conveyor 110, respectively, to achieve the purpose of forced deviation correction of the steel strip.

[0055] It should be noted that first rollers 161 are also provided below the horizontal section of the steel belt and below the climbing section of the steel belt to support the corresponding parts of the bearing steel belt.

[0056] Specifically, in the exemplary embodiment, the dry slag discharger of a coal-fired power plant further includes a housing, one end of which is provided with a horizontal housing section 181, the middle portion is provided with a transition housing section 182, and the other end is provided with a climbing housing section 183. An air inlet is provided at the end of the horizontal housing section 181 away from the transition housing section 182 and at the end of the climbing housing section 183 away from the transition housing section 182. Cooling air is introduced into the housing through the air inlet to cool the steel strip. The first transition section of the steel strip conveyor 110 and the second transition section of the cleaning chain 120 are provided in the transition housing section 182. The first climbing section of the steel strip conveyor 110 and the second climbing section of the cleaning chain 120 are provided in the climbing housing section 183. The opposite ends of the liquid delivery pipe 1311 of the lower spray section 131 are detachably connected to the opposite sides of the transition housing section 182 by mounting plates and bolts, respectively, to facilitate the disassembly, replacement, cleaning, and installation and use of the lower spray section 131. The opposite ends of the fluid delivery tube 1311 of the middle spray section 132 are detachably connected to opposite sides of the climbing section 183 via mounting plates and bolts, facilitating removal, replacement, cleaning, and installation of the lower spray section 131. The opposite ends of the fluid delivery tube 1311 of the upper spray section 133 are detachably connected to opposite sides of the climbing section 183 via mounting plates and bolts. Accordingly, a first mounting hole for receiving the fluid delivery tube 1311 of the lower spray section 131 is defined in at least one side wall of the transition section. Second mounting holes for receiving the fluid delivery tubes 1311 of the middle spray section 132 and the fluid delivery tubes 1311 of the upper spray section 133 are defined in at least one side wall of the climbing section 183. The opposite ends of each first roller 161 are rotatably connected to opposite sides of the transition section 182 via bearings. The opposite ends of each second roller 162 are rotatably connected to opposite sides of the transition section 182 via bearings. The opposite ends of each first pressure roller 171 are rotatably connected to opposite sides of the transition box section 182 via bearings. The opposite ends of each second pressure roller 172 are rotatably connected to opposite sides of the transition box section 182 via bearings. Two corrective wheels are rotatably connected to opposite inner walls of the transition box section 182 via brackets and bearings.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "example," "specific example," "a specific embodiment," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solution and the concept of the invention, which should be covered by the scope of protection of the present invention.

Claims

1. A dry slag discharger for a coal-fired power plant, characterized in that: include: The steel belt conveyor has a first transition section in the middle and a first climbing section at one end; A cleaning chain is disposed as a whole below the steel belt conveyor, with a second transition section in the middle and a second climbing section at one end close to the first climbing section; The spray unit is arranged between the first transition section and the second transition section and between the first climbing section and the second climbing section, and can generate mist droplets.

2. The dry slag discharger for coal-fired power plants according to claim 1, characterized in that: The spray unit comprises: a lower spray section, disposed between the first transition section and the second transition section, capable of generating mist droplets; A middle spray section, which is disposed between one end of the first climbing section close to the first transition section and one end of the second climbing section close to the second transition section, and is also capable of generating mist droplets; The upper spray portion is arranged between an end of the first climbing section away from the first transition section and an end of the second climbing section away from the second transition section, and can also generate droplets.

3. The dry slag discharger for coal-fired power plants according to claim 2, characterized in that: The lower spraying part comprises: A liquid infusion pipe, the axis of which is perpendicular to the length direction of the steel belt conveyor; A plurality of atomizing nozzles are evenly fixed on the infusion tube along the axial direction of the infusion tube; The structure of the lower spray portion is the same as that of the middle spray portion and that of the upper spray portion.

4. The dry slag discharger for coal-fired power plants according to claim 3, characterized in that: The axis of each atomizing nozzle is arranged horizontally.

5. The dry slag discharger for coal-fired power plants according to claim 3, characterized in that: The axial distance between each two adjacent atomizing nozzles is 20cm-50cm; The axial distance between the infusion tube of the lower spray part and the infusion tube of the middle spray part is 50cm-100cm; the axial distance between the infusion tube of the middle spray part and the infusion tube of the upper spray part is 50cm-100cm.

6. The dry slag discharger for coal-fired power plants according to claim 3, characterized in that: Also includes: A reservoir for storing water; The pump is respectively connected with the liquid storage cylinder, the liquid infusion pipe of the lower spray part, the liquid infusion pipe of the middle spray part, and the liquid infusion pipe of the upper spray part.

7. The dry slag discharger for coal-fired power plants according to any one of claims 1 to 6, characterized in that: The first transition section includes an upper steel belt transition section and a lower steel belt transition section; the second transition section includes an upper sweeping chain transition section and a lower sweeping chain transition section; Also includes: Two first rollers are rotatably disposed below the upper steel belt transition section and below the lower steel belt transition section, and the side walls thereof are respectively in contact with the bottom surface of the upper steel belt transition section and the bottom surface of the lower steel belt transition section; There are two second rollers, which are rotatably arranged below the upper cleaning chain transition section and the lower cleaning chain transition section, and the side walls are respectively in contact with the bottom surface of the upper cleaning chain transition section and the bottom surface of the lower cleaning chain transition section.

8. The dry slag discharger for coal-fired power plants according to any one of claims 1 to 6, characterized in that: Also includes: There are two first pressing rollers, which are rotatably disposed above the upper steel belt transition section and above the lower steel belt transition section, and whose side walls abut against the top surface of the upper steel belt transition section and the top surface of the lower steel belt transition section respectively; There are two second pressure rollers, which are rotatably arranged above the upper cleaning chain transition section and above the lower cleaning chain transition section, and their side walls are respectively in contact with the top surface of the upper cleaning chain transition section and the top surface of the lower cleaning chain transition section.

9. The dry slag discharger for coal-fired power plants according to any one of claims 1 to 6, characterized in that: Also includes: There are two deviation-correcting wheels, which are rotatably arranged on opposite sides of the steel belt conveyor, and the side walls are respectively in contact with the opposite side edges of the steel belt conveyor.

10. The dry slag discharger for coal-fired power plants according to claim 3, characterized in that: Also includes: The box body has a horizontal box section at one end, a transition box section in the middle, and a climbing box section at the other end; an air inlet is respectively provided at one end of the horizontal box section away from the transition box section and at one end of the climbing box section away from the transition box section; The first transition section of the steel belt conveyor and the second transition section of the cleaning chain are arranged in the transition box section; The first climbing section of the steel belt conveyor and the second climbing section of the cleaning chain are arranged in the climbing box section; The opposite ends of the liquid delivery pipe of the lower spray part are detachably connected to the opposite sides of the transition box section respectively; The opposite ends of the liquid infusion tube of the middle spray section are detachably connected to the opposite sides of the climbing box section respectively; The opposite ends of the liquid infusion tube of the upper spray part are detachably connected to the opposite sides of the climbing box section respectively.

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