A dust-free cooling device for a slag crusher in a coal-fired power plant

Abstract

The present invention provides a dust-free cooling device for a slag crusher in a coal-fired power plant, and relates to the technical field of environmental protection equipment in coal-fired power plants, including: a slag crusher, a dust-free cooling box is provided at the bottom discharge port of the slag crusher, the bottom end of the dust-free cooling box is connected to a belt transmission assembly through a plurality of support rods, and a dust-free cooling mechanism is provided in the dust-free cooling box. The present invention provides a dust-free cooling mechanism, and then sprays water through a water mist nozzle onto the hot ash produced by the slag crusher through a plurality of spray branches, thereby effectively cooling the hot ash. This effectively improves the technical problem proposed in the background technology that the existing hot ash cannot be effectively cooled during transportation, and when the boiler is frequently coked, the slag volume is large, and the slag temperature is high, ash dust will be generated during the transportation and discharge of the hot ash, affecting the civilized hygiene on site and causing the risk of environmental pollution.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment of coal-fired power plants, in particular to a dust-free cooling device for a slag crusher in a coal-fired power plant. Background Art

[0002] The traditional slag removal technology for coal-fired power plant boilers adopts dry slag discharge: the hot ash falling from the boiler furnace falls onto the dry slag discharge machine conveyor belt through the boiler slag well, is sent out with the conveyor belt, falls into the slag crusher for crushing and enters the slag bin, and then passes through the humidifying feeder to the slag outlet for external transportation and comprehensive utilization. The hot ash cannot be completely cooled during the transportation process. When the boiler frequently cokes, the slag volume is large, and the slag temperature is high, ash dust will be generated during the transportation and slag discharge of the hot ash, affecting the on-site civilization and hygiene, and there is a technical problem of causing environmental pollution risks. Therefore, in view of the above situation, it is urgent to develop a dust-free cooling device for the slag crusher of coal-fired power plants to overcome the shortcomings in current practical applications. Summary of the invention

[0003] The present invention provides a dust-free cooling device for a slag crusher in a coal-fired power plant, which is used to solve the technical problems raised in the above-mentioned background technology: the existing hot ash slag cannot be effectively cooled during the transportation process, and when the boiler is frequently coked, the slag volume is large, and the slag temperature is high, ash slag dust will be generated during the transportation and discharge of the hot ash slag, affecting the on-site civilization and hygiene, and posing a risk of environmental pollution.

[0004] To solve the above technical problems, the present invention discloses a dust-free cooling device for a slag crusher in a coal-fired power plant, comprising: a slag crusher, a dust-free cooling box is arranged at the bottom discharge port of the slag crusher, the bottom end of the dust-free cooling box is connected to a belt transmission assembly through a plurality of support rods, and a dust-free cooling mechanism is arranged in the dust-free cooling box.

[0005] Preferably, the bottom discharge port of the slag crusher is fixedly connected to the top of the dust-free cooling box, and the dust-free cooling mechanism is symmetrically arranged on the left and right sides of the dust-free cooling box, and the dust-free cooling mechanism comprises: a long tube one, the long tube one is fixedly installed on the inner wall of the dust-free cooling box, one end of a plurality of spray branch pipes is connected to the long tube one, the other ends of the plurality of spray branch pipes pass through the partition and are fixedly connected to the water mist nozzle, and manual ball valves are installed on the plurality of spray branch pipes, the other end of the long tube one is connected to the water supply mechanism through a connecting tube one, a slag discharge port is arranged at the bottom end of the dust-free cooling box, and the partition is fixedly installed on the inner wall of the dust-free cooling box.

[0006] Preferably, the belt conveyor assembly is driven by a driving motor, and the conveying direction of the belt conveyor assembly is from left to right.

[0007] Preferably, the water mist nozzle is made by a chrome plating process.

[0008] Preferably, an ash cleaning box is fixedly installed on the right end of the dust-free cooling box, and a belt cleaning mechanism is arranged in the ash cleaning box, and the belt cleaning mechanism comprises: a water storage chamber, the water storage chamber is arranged at the left end of the ash cleaning box, and the top of the water storage chamber is connected to the connecting pipe 2, and a valve is fixedly installed on the connecting pipe 2, and a water pump is fixedly installed on the left bottom end of the water storage chamber, the input end of the water pump is connected with the water storage chamber, and the input end of the water pump is connected with the long tube 2 arranged inside the rack through a connecting hose, and the bottom end of the long tube 2 is connected with a plurality of nozzles, the bottom end of the nozzle 1 cooperates with the belt transmission assembly, and the other end of the rack is connected to the driving assembly.

[0009] Preferably, a belt drying mechanism is also provided in the ash cleaning box, and the belt drying mechanism comprises: a dryer, the dryer is fixedly mounted on the right inner wall of the ash cleaning box, and the output end of the dryer is connected to the pressurizing chamber through a connecting pipe three, and a piston is connected to the pressurizing chamber for left and right sliding, the left end of the piston is fixedly mounted on one end of a long rod, and the other end of the long rod is connected to a driving assembly, the right bottom end of the pressurizing chamber is connected to a long tube two through a connecting pipe four, the long tube two is fixedly mounted on the top of an opening provided at the bottom end of the pressurizing chamber, the bottom end of the long tube two is connected to a plurality of nozzles two, and a reverse flow valve is fixedly installed in the connecting pipe four.

[0010] Preferably, the slag crusher also includes:

[0011] A speed sensor, used to detect the rotation speed of the crushing roller in the slag crusher;

[0012] A controller and an alarm are electrically connected to the speed sensor and the alarm.

[0013] Preferably, the controller controls the alarm to work based on the speed sensor, comprising the following steps:

[0014] Step 1: According to formula (1), calculate the actual compressive strength K of the slag in the slag crusher:

[0015]

[0016] Wherein E is the Young's modulus of the ash in the slag crusher, L is the length of the feed port of the slag crusher, λ is the loose coefficient of the ash in the slag crusher, R is the width of the feed port of the slag crusher, r is the width of the discharge port of the slag crusher, H is the height of the slag crusher, θ is the meshing angle of the crushing roller in the slag crusher, and tan is the tangent;

[0017] Step 2: According to the following formula (2) and the speed sensor detection value, the actual output power W of the slag crusher drive motor is calculated. The controller compares the actual output power W of the slag crusher drive motor with the preset output power range. When the actual installed power is not within the preset output power range, the controller controls the alarm to sound an alarm:

[0018]

[0019] Where V is the detection value of the speed sensor, μ is the reserve coefficient of the driving motor in the slag crusher, δ is the filling coefficient of ash in the slag crusher, and η is the transmission efficiency of the driving motor in the slag crusher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A front view of the structure provided by an embodiment of the present invention;

[0022] Figure 2 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at point A in the middle;

[0023] Figure 3 The embodiment of the present invention provides Figure 1 Schematic diagram of the partially enlarged structure.

[0024] Reference numerals:

[0025] 1. Slag crusher; 2. Dust-free cooling box; 3. Support rod; 4. Belt transmission assembly; 5. Long pipe 1; 6. Spray branch pipe; 7. Partition; 8. Water mist nozzle; 9. Manual ball valve; 10. Connecting pipe 1; 11. Ash discharge port; 12. Driving motor 1; 13. Ash cleaning box; 14. Water storage chamber; 15. Connecting pipe 2; 16. Valve; 17. Water pump; 18. Connecting hose; 19. Rack; 20. Long pipe 2; 2 1. Nozzle 1; 22. Dryer; 23. Connecting pipe 3; 24. Pressurizing chamber; 25. Piston; 26. Long rod; 27. Connecting pipe 4; 28. Long pipe 2; 29. ​​Opening; 30. Nozzle 2; 31. Backflow valve; 32. Driving motor 2; 33. Cavity 1; 34. Gear; 35. Short rod; 36. Rectangular frame; 37. Slider 1; 38. Slide 1; 39. Return spring; 40. Slider 2; 41. Slide 2. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The present invention provides the following embodiments

[0029] Example 1

[0030] The embodiment of the present invention provides a dust-free cooling device for a slag crusher in a coal-fired power plant, such as Figure 1-2 As shown, a dust-free cooling device for a slag crusher in a coal-fired power plant comprises: a slag crusher 1, a dust-free cooling box 2 is arranged at the bottom discharge port of the slag crusher 1, the bottom end of the dust-free cooling box 2 is connected to a belt conveyor assembly 4 (the belt conveyor assembly can refer to the belt conveyor assembly in a brick and tile pad conveyor frame in CN103935678A) through a plurality of support rods 3 (the bottom ends of the plurality of support rods 3 are fixedly mounted on the front and rear ends of the belt conveyor assembly 4), and a dust-free cooling mechanism is arranged in the dust-free cooling box 2.

[0031] Optionally, the bottom discharge port of the slag crusher 1 is fixedly connected to the top of the dust-free cooling box 2, and the dust-free cooling mechanism is symmetrically arranged on the left and right sides of the dust-free cooling box 2, and the dust-free cooling mechanism includes: a long tube 5, the long tube 5 is fixedly installed on the inner wall of the dust-free cooling box 2, one end of a plurality of spray branch pipes 6 is connected to the long tube 5, the other ends of the plurality of spray branch pipes 6 pass through the partition 7 and are fixedly connected to the water mist nozzle 8, and manual ball valves 9 are installed on the plurality of spray branch pipes 6, the other end of the long tube 5 is connected to the water supply mechanism through a connecting pipe 10, and a slag discharge port 11 is arranged at the bottom end of the dust-free cooling box 2, and the partition 7 is fixedly installed on the inner wall of the dust-free cooling box 2.

[0032] Optionally, the belt conveyor assembly 4 is driven by a driving motor 12, and the conveying direction of the belt conveyor assembly 4 is from left to right.

[0033] Optionally, the water mist nozzle 8 is made by a chrome plating process.

[0034] The beneficial effects of the above technical scheme are as follows: the present invention sets a dust-free cooling mechanism, and then conveys water to the long tube 5 through the connecting pipe 10 through the water conveying mechanism, and then sprays water through a plurality of water mist nozzles 8 onto the hot ash produced by the slag crusher 1 through a plurality of spray branches 6, thereby effectively cooling the hot ash and preventing the fallen hot ash from generating dust. The processed ash will fall onto the belt conveyor assembly 4 for conveyance, and then the drive motor 12 is started, and the drive motor 12 drives the belt conveyor assembly 4 to rotate, thereby effectively conveying the ash. The present invention adopts a water mist nozzle 8 with a chrome plating process, which is not only corrosion-resistant and rust-resistant, but also has a large opening and a wide spraying range. By adding a manual ball valve 9 to the spray branch 6, the manual ball valve 9 has the effect of regulating the spraying dust reduction and cooling, thereby effectively reducing the ash temperature and the temperature of the large coke blocks in the boiler, and a small amount of humidification by spraying is beneficial to coke crushing and reducing the ash temperature. This effectively improves the technical problems raised in the background technology: the existing hot ash slag cannot be effectively cooled during the transportation process, the boiler frequently cokes, the slag volume is large, and the slag temperature is high, and ash slag dust will be generated during the transportation and discharge of the hot ash slag, affecting the civilized hygiene on site and posing a risk of environmental pollution.

[0035] Example 2

[0036] On the basis of Example 1, Figure 1-3 As shown, a dust-free cooling device for a slag crusher in a coal-fired power plant is described, wherein an ash cleaning box 13 is fixedly installed at the right end of the dust-free cooling box 2, and a belt cleaning mechanism is arranged in the ash cleaning box 13, and the belt cleaning mechanism comprises: a water storage chamber 14, wherein the water storage chamber 14 is arranged at the left end of the ash cleaning box 13, and the top end of the water storage chamber 14 is connected to a connecting pipe 15, and a valve 16 is fixedly installed on the connecting pipe 15, and a water pump 17 is fixedly installed at the bottom end of the left side of the water storage chamber 14, and the input end of the water pump 17 is connected to the water storage chamber 14, and the input end of the water pump 17 is connected to a long tube 20 arranged inside a rack 19 through a connecting hose 18, and the bottom end of the long tube 20 is connected to a plurality of nozzles 21, and the bottom end of the nozzle 21 cooperates with a belt transmission assembly 4, and the other end of the rack 19 is connected to a driving assembly.

[0037] Optionally, a belt drying mechanism is also provided in the ash cleaning box 13, and the belt drying mechanism includes: a dryer 22, the dryer 22 is fixedly mounted on the right inner wall of the ash cleaning box 13, and the output end of the dryer 22 is connected to the pressurizing chamber 24 through a connecting pipe three 23, and a piston 25 is connected to the pressurizing chamber 24 for sliding left and right, the left end of the piston 25 is fixedly mounted on one end of a long rod 26, and the other end of the long rod 26 is connected to a driving assembly, the right bottom end of the pressurizing chamber 24 is connected to a long tube two 28 through a connecting pipe four 27, the long tube two 28 is fixedly mounted on the top of an opening 29 provided at the bottom end of the pressurizing chamber 24, the bottom end of the long tube two 28 is connected to a plurality of nozzles two 30, and a reverse flow valve 31 is fixedly installed in the connecting pipe four 27.

[0038] Optionally, the driving component includes: a driving motor 2 32, the driving motor 2 32 is fixedly mounted on the rear end inner wall of a cavity 1 33 provided in the dust-free cooling box 2, and a gear 34 is fixedly mounted on the output end of the driving motor 2 32, a short rod 35 is fixedly mounted on the gear 34, the short rod 35 is movably connected in a rectangular frame 36, the right end of the rectangular frame 36 is fixedly connected to a long rod 26, a slider 37 is fixedly mounted on the top of the long rod 26, the slider 37 is slidably connected in a slide groove 1 38 provided at the top of the cavity 1 33, one end of a return spring 39 is fixedly mounted on the slider 1 37, and the other end of the return spring 39 is fixedly mounted on the inner wall of the right end of the cavity 1 33, the gear 34 is meshedly connected with the rack 19, and the bottom end of the rack 19 is slidably connected to the slide groove 2 41 provided at the bottom end of the cavity 1 33 through a slider 2 40.

[0039] The working principle of the above technical solution is as follows: since the surface of the belt conveyor assembly 4 after the cooling treatment will be stained with ash particles, it is estimated that agglomerates will be generated on the belt conveyor assembly 4 over time. When the belt conveyor assembly 4 needs to be cleaned, the drive motor 2 32 is first started, and the rotation of the drive motor 2 32 drives the gear 34 to rotate, and the rotation of the gear 34 drives the rack 19 to move left and right. At the same time, the water pump 17 is started, and the water in the water pump 17 is passed through the connecting hose 18 and the long tube 20, and then the water is sprayed onto the surface of the belt conveyor assembly 4 through a plurality of nozzles 21, so as to clean the planes of the belt conveyor assembly 4 at different positions (because when cleaning the belt conveyor assembly 4, a certain section of the belt conveyor assembly 4 needs to be moved to the bottom of the nozzle 21 , after the section is fully cleaned, the next section is used for cleaning again), after cleaning, the cleaned section is moved to the bottom end of the opening 29, and then the dryer 22 is started, and the gas generated by the dryer 22 will be transported to the pressurized chamber 24 through the connecting pipe three 23, and then the rotation of the gear 34 drives the rectangular frame 36 connected to the short rod 35 to move left and right, and the left and right movement of the rectangular frame 36 drives the long rod 26 to move left and right accordingly, and the left and right movement of the long rod 26 drives the piston 25 to move left and right in the pressurized chamber 24, so that the hot air in the pressurized chamber 24 passes through the connecting pipe four 27 and the long pipe two 28, and finally is sprayed to the surface of the belt transmission component 4 through the nozzle two 30, thereby drying the water on the belt surface of the belt transmission component 4.

[0040] The beneficial effects of the above technical solution are as follows: by setting the connecting pipe 2 15 and the valve 16, it is beneficial to add water to the water storage chamber 14; by setting the water pump 17, it is beneficial to spray water onto the surface of the belt transmission component 4 through the plurality of nozzles 21; by moving the rack 19 left and right, the plurality of nozzles 21 can be driven to effectively clean the belt surface; by setting the slider 2 40 and the slide groove 2 41, it is beneficial to achieve effective limiting treatment of the rack 19; by setting the gear 34, the short rod 35 and the rectangular frame 36, it is beneficial to achieve left and right movement of the piston 25, so as to pressurize the high-temperature hot air in the pressurization chamber 24; by setting the slider 1 37 and the reset spring 39, it is beneficial to achieve the reset treatment of the long rod 26; by setting the dryer 22, it is beneficial to provide hot air for the belt transmission component 4; by setting the backflow valve 31, it is beneficial to prevent gas backflow; by setting the plurality of nozzles 2 30, it is beneficial to achieve sufficient drying treatment of the belt surface, which is very convenient and practical.

[0041] Example 3

[0042] On the basis of Embodiment 1-2, a dust-free cooling device for a slag crusher in a coal-fired power plant, the slag crusher 1 (the slag crusher is referred to as a slag crusher for large slag strong crushing in CN208944213U boiler dry slag discharge) further comprises:

[0043] A speed sensor, used to detect the rotation speed of the crushing roller in the slag crusher 1;

[0044] A controller and an alarm are electrically connected to the speed sensor and the alarm.

[0045] Optionally, the controller controls the alarm to work based on the speed sensor, comprising the following steps:

[0046] Step 1: According to formula (1), calculate the actual compressive strength K of the slag in the slag crusher 1:

[0047]

[0048] Wherein, E is the Young's modulus of the ash in the slag crusher 1 (an important physical quantity that describes the ash's ability to resist deformation), L is the length of the feed port of the slag crusher 1, λ is the loose coefficient of the ash in the slag crusher 1 (indicating the ratio of the volume (or density) of the ash in a loose state to its volume (or density) in a tight or natural state, and this ratio can reflect the degree of voids and looseness between the ash particles, and the value range is 0.25-0.70), R is the width of the feed port of the slag crusher 1, r is the width of the discharge port of the slag crusher 1, H is the height of the slag crusher 1, θ is the meshing angle of the crushing roller in the slag crusher 1, and tan is the tangent;

[0049] Step 2: According to the following formula (2) and the speed sensor detection value, the actual output power W of the driving motor of the slag crusher 1 is calculated. The controller compares the actual output power W of the driving motor of the slag crusher 1 with the preset output power range. When the actual installed power is not within the preset output power range, the controller controls the alarm to sound an alarm:

[0050]

[0051] Wherein V is the detection value of the speed sensor, μ is the standby coefficient of the driving motor in the slag crusher 1 (the value range is 1.05-1.15), δ is the filling coefficient of the ash in the slag crusher 1 (the filling coefficient is a parameter used to measure the filling capacity of ash in a specific space or medium, and the value range is 0.75-0.96), and η is the transmission efficiency of the driving motor in the slag crusher 1 (the value range is 0.6-0.75).

[0052] The beneficial effects of the above technical solution are as follows: the controller calculates the actual compressive strength of the slag in the slag crusher 1 based on the formula (1), and by comprehensively considering the Young's modulus of the slag in the slag crusher 1, the length of the feed port of the slag crusher 1, the loose coefficient of the slag in the slag crusher 1, the width of the feed port of the slag crusher 1, the width of the discharge port of the slag crusher 1, the height of the slag crusher 1, and the meshing angle of the crushing roller in the slag crusher 1, the calculation result is more accurate and reliable;

[0053] Then, according to formula (2) and the speed sensor detection value, the actual output power of the driving motor of the slag crusher 1 is calculated, and the spare coefficient of the driving motor in the slag crusher 1, the filling coefficient of the ash in the slag crusher 1, and the transmission efficiency of the driving motor in the slag crusher 1 are comprehensively considered, so that the calculation result is more accurate and reliable;

[0054] The controller controls the operation of the speed sensor, and compares the actual output power of the driving motor of the slag crusher 1 with the preset output power range. When the actual output power is not within the preset output power range, the controller controls the alarm to sound an alarm, reminding the staff to promptly inspect or replace the driving motor in the slag crusher 1, thereby meeting the user's demand for a dust-free cooling device for the slag crusher in this coal-fired power plant.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dust-free cooling device for a slag crusher in a coal-fired power plant, characterized in that: include: A slag crusher (1), wherein a dust-free cooling box (2) is arranged at a bottom discharge port of the slag crusher (1), the bottom end of the dust-free cooling box (2) is connected to a belt conveyor assembly (4) via a plurality of support rods (3), and a dust-free cooling mechanism is arranged inside the dust-free cooling box (2).

2. A dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 1, characterized in that The bottom discharge port of the slag crusher (1) is fixedly connected to the top of the dust-free cooling box (2), and the dust-free cooling mechanism is symmetrically arranged on the left and right sides of the dust-free cooling box (2). The dust-free cooling mechanism comprises: a long tube (5), the long tube (5) is fixedly installed on the inner wall of the dust-free cooling box (2), one end of a plurality of spray branch pipes (6) is connected to the long tube (5), the other end of the plurality of spray branch pipes (6) passes through the partition (7) and is fixedly connected to the water mist nozzle (8), and a manual ball valve (9) is installed on each of the plurality of spray branch pipes (6), the other end of the long tube (5) is connected to the water supply mechanism through a connecting pipe (10), and the bottom end of the dust-free cooling box (2) is provided with a slag discharge port (11), and the partition (7) is fixedly installed on the inner wall of the dust-free cooling box (2).

3. The dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 1 is characterized in that The belt conveyor assembly (4) is driven by a driving motor (12), and the conveying direction of the belt conveyor assembly (4) is from left to right.

4. The dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 2, characterized in that: The water mist nozzle (8) is made by chrome plating technology.

5. The dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 1, characterized in that: An ash cleaning box (13) is fixedly installed at the right end of the dust-free cooling box (2), and a belt cleaning mechanism is arranged in the ash cleaning box (13), and the belt cleaning mechanism comprises: a water storage chamber (14), the water storage chamber (14) is arranged at the left end of the ash cleaning box (13), and the top end of the water storage chamber (14) is connected to a second connecting pipe (15), and a valve (16) is fixedly installed on the second connecting pipe (15), and a water pump (17) is fixedly installed at the left bottom end of the water storage chamber (14), the input end of the water pump (17) is connected to the water storage chamber (14), and the input end of the water pump (17) is connected to a second long pipe (20) arranged inside the rack (19) through a connecting hose (18), and the bottom end of the second long pipe (20) is connected to a plurality of nozzles (21), the bottom end of the first nozzle (21) cooperates with the belt transmission component (4), and the other end of the rack (19) is connected to the driving component.

6. A dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 5, characterized in that: A belt drying mechanism is also provided in the ash cleaning box (13), and the belt drying mechanism comprises: a drying machine (22), the drying machine (22) is fixedly mounted on the right inner wall of the ash cleaning box (13), and the output end of the drying machine (22) is connected to the pressurizing chamber (24) through a connecting pipe (23), and a piston (25) is slidably connected to the pressurizing chamber (24) from left to right, the left end of the piston (25) is fixedly mounted on one end of a long rod (26), and the other end of the long rod (26) is connected to a driving component, the right bottom end of the pressurizing chamber (24) is connected to a long tube (28) through a connecting pipe (27), the long tube (28) is fixedly mounted on the top of an opening (29) provided at the bottom end of the pressurizing chamber (24), the bottom end of the long tube (28) is connected to a plurality of nozzles (30), and a reverse flow valve (31) is fixedly mounted in the connecting pipe (27).

7. The dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 1, characterized in that: The slag crusher (1) further comprises: A speed sensor, used for detecting the rotation speed of a crushing roller in the slag crusher (1); A controller and an alarm are electrically connected to the speed sensor and the alarm.

8. The dust-free cooling device for a slag crusher in a coal-fired power plant according to claim 7, characterized in that: The controller controls the alarm to work based on the speed sensor, including the following steps: Step 1: According to formula (1), calculate the actual compressive strength K of the slag in the slag crusher (1): Wherein E is the Young's modulus of the ash in the slag crusher (1), L is the length of the feed port of the slag crusher (1), λ is the loose coefficient of the ash in the slag crusher (1), R is the width of the feed port of the slag crusher (1), r is the width of the discharge port of the slag crusher (1), H is the height of the slag crusher (1), θ is the meshing angle of the crushing roller in the slag crusher (1), and tan is the tangent; Step 2: According to the following formula (2) and the speed sensor detection value, the actual output power W of the driving motor of the slag crusher (1) is calculated. The controller compares the actual output power W of the driving motor of the slag crusher (1) with the preset output power range. When the actual installed power is not within the preset output power range, the controller controls the alarm to sound an alarm: Wherein V is the detection value of the speed sensor, μ is the standby coefficient of the driving motor in the slag crusher (1), δ is the filling coefficient of the ash in the slag crusher (1), and η is the transmission efficiency of the driving motor in the slag crusher (1).

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