Thermal power plant boiler bottom slag treatment device and method

Abstract

The invention relates to the technical field of slag treatment, in particular to a thermal power plant boiler bottom slag treatment device and method.The thermal power plant boiler bottom slag treatment device comprises a supporting box, a feeding hopper is arranged on one side of the upper end of the supporting box, a conveying belt is arranged at the bottom of the supporting box, a discharging opening located in the side, in the conveying direction, of the conveying belt is formed in the supporting box, and a conveying cooler is arranged in the supporting box; the conveying cooler comprises an arc-shaped supporting frame arranged on the supporting box, and a gap is reserved between the end, deviating from the feeding hopper, of the arc-shaped supporting frame and the supporting box. When boiler bottom slag is treated, small granular bottom slag can penetrate through a plurality of slag discharging holes formed in the arc-shaped supporting frame to fall on the conveying belt and then is discharged from an opening; large blocky bottom slag can be pushed by the spiral blade to be conveyed to the gap, the blocky bottom slag falling down from the gap can enter the space between the first crushing rollers arranged on the two first crushing shafts, and the blocky bottom slag is extruded, sheared and crushed under the action of the first crushing rollers.

Description

Technical Field

[0001] The present application relates to the technical field of slag treatment, and in particular to a device and method for treating bottom slag of a boiler in a thermal power plant. Background Art

[0002] The boiler of a thermal power plant is one of the core equipment of a thermal power plant. Its main function is to convert chemical energy into thermal energy by burning fossil fuels (such as coal, natural gas or oil), and then heat water to produce high-temperature and high-pressure steam. These steams drive the steam turbine to generate electricity, and finally realize the process of converting thermal energy into electrical energy. The boiler of a thermal power plant is usually composed of a combustion system, an evaporation system, a superheating system, a reheating system, an economizer and an air preheater. The combustion system is responsible for mixing the fuel and air and burning them to release a large amount of heat energy. The evaporation system heats the water into steam through equipment such as water-cooled walls. The superheater and reheater further increase the temperature and pressure of the steam to improve the power generation efficiency.

[0003] During the operation of the boiler in a thermal power plant, the combustion of fuel will produce a large amount of solid residues, which mainly include bottom ash and fly ash. Bottom ash refers to solid particles that have not been completely burned during the combustion of the fuel and the ash after combustion, which are mainly deposited at the bottom of the boiler furnace.

[0004] By rationally cooling, conveying, screening and utilizing the bottom ash as resources, the impact of the bottom ash on the environment can be effectively reduced and the recycling of resources can be achieved. For example, a bottom ash treatment device for a thermal power plant boiler with publication number CN110302870A relates to the field of coal ash technology. The prior art includes a box body, a motor is fixedly installed at the center of the top of the box body through an installation frame, the output shaft of the motor is fixedly sleeved with a rotating shaft, the bottom of the rotating shaft passes through the top of the box body and extends to the inside of the box body, and both ends of the surface of the rotating shaft extending to the inside of the box body are fixedly welded with fixed frames, the surface of the rotating shaft is fixedly sleeved with a driving wheel located inside the fixed frame, and both sides of the driving wheel are meshingly connected with driven wheels.

[0005] However, the above-mentioned prior art still has some defects when treating boiler bottom ash:

[0006] 1. When the above-mentioned prior art is used, the coal slag is poured from the feed hopper into the interior of the box body, and the coal slag is crushed under the action of the crushing knife. At the same time, the rotating shaft drives the second fixed shaft to rotate to realize the crushing of the coal slag from different directions. In the actual process, the boiler will not stop burning during the discharge of the boiler bottom slag, which causes the temperature of the bottom slag produced from the boiler to be very high. After the high-temperature bottom slag enters the crushing device, it will heat up rapidly. The crushing knife is prone to softening, deformation or even breaking at high temperature. The softening of the crushing knife will cause its sharpness to decrease, and the crushing efficiency will be significantly reduced. At the same time, the crushing knife is repeatedly subjected to force and wear at high temperature, and its service life will be greatly shortened.

[0007] The density of boiler bottom ash is relatively high, generally 2.0-2.5g / cm 3 This makes the bottom slag have good wear resistance and compressive strength. The bottom slag with high wear resistance and high compressive strength will produce a large reaction force on the crushing knife during the crushing process, resulting in increased wear of the crushing knife and even chipping or breakage of the crushing knife.

[0008] 2. In the above-mentioned prior art, coal slag is poured from the feed hopper into the interior of the box body, and the coal slag is crushed under the action of the crushing knife, and a large amount of dust will be generated during the crushing process of the bottom slag, which will not only affect the working environment, but also cause harm to the health of the operators.

[0009] Moreover, boiler bottom ash is often in irregular granular form. Some of the bottom ash will form larger irregular blocks under high-temperature calcination in the boiler. The irregular block bottom ash is easily stuck between the crushing knife and the box during the crushing process, causing the crushing knife to be unable to rotate normally, and even causing the equipment to be stuck or damaged. The crushing of block bottom ash requires greater crushing force and longer crushing time, which further increases the load and wear of the crushing knife.

[0010] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for slag treatment. Summary of the invention

[0011] In order to solve the above technical problems, the present application provides a device and method for treating bottom ash of a thermal power plant boiler, which adopts the following technical solutions:

[0012] In a first aspect, a boiler bottom ash treatment device for a thermal power plant comprises a support box, a feeding funnel is arranged on one side of the upper end of the support box, a conveyor belt is arranged at the bottom of the support box, a discharge port is opened on the support box and is located on one side of the conveying direction of the conveyor belt, and a conveying cooler is arranged in the support box;

[0013] The conveying cooler includes an arc-shaped support frame arranged on a support box, a gap is reserved between the end of the arc-shaped support frame away from the feed funnel and the support box, and a conveying shaft is symmetrically and rotatably penetrated on both sides of the support box. The conveying shaft is located in the arc-shaped support frame, and spiral blades are arranged on the conveying shaft, and the rotation directions of the two spiral blades are opposite.

[0014] Preferably, the conveying cooler also includes a plurality of slag discharge holes opened on the arc-shaped support frame 5, sliding grooves are symmetrically opened on both sides of the support box, sliding blocks are slidably arranged in the sliding grooves, and the conveying shaft rotates and passes between the two sliding blocks on the same side.

[0015] Preferably, the two sliding blocks on the same side are both provided with connecting blocks, and an adjusting rod threadedly connected to the two connecting blocks is rotatably passed through the two connecting blocks.

[0016] Preferably, a driving gear is provided at one end of the conveying shaft, a connecting ring is rotatably provided at one end of the conveying shaft, a telescopic pull rod is provided on the connecting ring, a driven shaft is rotatably provided on the telescopic ends of the two telescopic pull rods, and a driven gear meshing with the driving gear is provided on the driven shaft.

[0017] Preferably, the arc-shaped support frame includes an upper frame arranged in a support box, the upper frame is provided with a plurality of upper holes, a lower frame is slidably arranged at the lower end of the upper frame, the lower frame is provided with lower holes corresponding to the upper holes one by one, and the upper holes and the lower holes are connected to each other to form a slag discharge hole.

[0018] Preferably, a sliding groove is provided on the support box, a sliding block connected to the lower frame is slidably arranged in the sliding groove, and an adjusting screw threadedly connected to the sliding block is rotatably arranged on the support box through a bracket.

[0019] Preferably, a cooling element is provided on the conveying shaft;

[0020] The cooling element comprises a water inlet hole opened on the conveying shaft, and a plurality of circumferentially distributed water outlet holes are opened on the conveying shaft, and the water outlet holes are located in the arc-shaped supporting frame.

[0021] Preferably, the support box is provided with a crusher located inside the support box;

[0022] The crusher comprises a crushing shaft 1 which is symmetrically and rotatably arranged on a support box, and the crushing shaft 1 is located below the gap, and a crushing roller 1 is arranged on the crushing shaft 1.

[0023] Preferably, a transmission shaft is symmetrically and rotatably provided on the support box, and a conveying roller is provided on the transmission shaft.

[0024] In a second aspect, a method for treating bottom ash of a thermal power plant boiler comprises the following steps:

[0025] S1: When processing the boiler bottom ash, first connect the feed funnel provided on one side of the upper end of the support box to the boiler slag discharge port, then open the boiler slag discharge port, and the bottom ash discharged from the discharge port enters the arc-shaped support frame along the feed funnel;

[0026] S2: Then, the two conveying shafts are driven to rotate relative to each other through the existing driving technology, and the bottom slag is conveyed to the gap through the spiral blades. The small granular bottom slag passes through the slag discharge hole and falls on the conveyor belt, and then is discharged from the discharge port, while the large block bottom slag is conveyed to the gap under the push of the spiral blades;

[0027] S3: The block bottom slag falling from the gap enters between the two crushing rollers arranged on the crushing shafts, and the block bottom slag is squeezed, sheared and crushed under the action of the crushing rollers;

[0028] S4: During the conveying process of the spiral blades, small granular bottom slag passes through the slag discharge hole and falls on the conveying rollers arranged on the two transmission shafts. The two crushing rollers 1 apply extrusion and shearing forces to the block bottom slag during relative rotation to crush it into smaller particles. At the same time, the bottom slag crushed by the crushing shaft 1 is discharged from between the crushing rollers 1 and also falls on the two conveying rollers to be squeezed and crushed;

[0029] S5: The bottom slag is squeezed and crushed between the two conveyor rollers, then falls onto the conveyor belt and is discharged from the discharge port.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. When the present invention processes the boiler bottom ash, small granular bottom ash will pass through a plurality of slag discharge holes on the arc-shaped support frame and fall onto the conveyor belt, and then be discharged from the outlet, while large block bottom ash will be transported to the gap under the push of the spiral blades, and the block bottom ash falling from the gap will enter between the crushing rollers 1 arranged on the two crushing shafts 1, and the block bottom ash will be squeezed, sheared and crushed under the action of the crushing rollers 1.

[0032] 2. The conveying roller of the present invention will drive the spiral rolling groove, and the bottom slag will be squeezed and crushed between the two conveying rollers, and then fall on the conveyor belt and be discharged from the discharge port. At the same time, the spiral rolling groove and the conical cylindrical conveying roller will transport the remaining block bottom slag to the gap, and the remaining block bottom slag falling from the gap will enter between the two crushing rollers. The block bottom slag is fully squeezed, sheared and crushed under the action of the crushing roller, and then falls on the conveyor belt and is discharged from the discharge port.

[0033] 3. The adjusting screw of the present invention drives the sliding block to move in the sliding groove through a threaded connection. The movement of the sliding block drives the lower frame to move on the upper frame. The movement of the lower frame changes the position of the lower hole, thereby changing the overlapping degree between the upper hole and the lower hole. When the lower hole overlaps with the upper hole, the slag discharge hole is larger in size and can pass through large block bottom slag. When the lower hole and the upper hole are staggered with each other, the slag discharge hole is smaller in size and can only pass through small block bottom slag.

[0034] 4. The water outlet of the present invention is located in the arc-shaped support frame and sprays water evenly on the bottom slag as the conveying shaft rotates, so as to cool the bottom slag and reduce the temperature of the bottom slag. The sprayed water can also cool the spiral blades, effectively reducing the temperature of the bottom slag and the spiral blades, preventing high temperature from damaging subsequent equipment and facilities, and improving the service life and cutting efficiency of the spiral blades. At the same time, part of the water sprayed from the water outlet will pass through the slag discharge hole and fall on the conveying roller, further cooling the bottom slag, and then pass through the conveying roller and fall on the bottom of the conveyor belt and the support box to be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 It is a schematic diagram of the structure between the discharge port and the conveyor belt of the present invention.

[0037] Figure 3 It is a cross-sectional view of the present invention.

[0038] Figure 4 It is a schematic structural diagram of the conveying cooler of the present invention.

[0039] Figure 5 It is a partial structural schematic diagram of the conveying cooler of the present invention.

[0040] Figure 6 The present invention Figure 5 A partial enlarged view of point A in the middle.

[0041] Figure 7 It is a schematic structural diagram of the cooling element of the present invention.

[0042] Figure 8 It is a schematic structural diagram of the crusher of the present invention.

[0043] Fig. 9 It is a cross-sectional view of a crusher of the present invention.

[0044] Fig.10 It is a top view between the transmission shaft and the conveying roller of the present invention.

[0045] Fig.11 It is a plane schematic diagram of the present invention

[0046] Fig.12 It is a schematic diagram of the structure between the arc-shaped supporting frames of the present invention.

[0047] Fig.13 The invention comprises a sliding groove, a sliding block and an adjusting screw;

[0048] Fig.14 The present invention Fig.13 A partial enlarged view of point B in the middle.

[0049] Explanation of reference numerals: 1, support box; 11, discharge port; 2, feed hopper; 3, conveyor belt; 4, conveyor cooler; 41, gap; 42, conveyor shaft; 43, spiral blade; 44, sliding groove; 45, sliding block; 451, connecting block; 46, adjusting rod; 47, driving gear; 48, connecting ring; 481, telescopic pull rod; 482, driven shaft; 49, driven gear; 5, arc-shaped support frame; 51, row Slag hole; 52, upper frame; 53, upper hole; 54, lower frame; 55, lower hole; 56, sliding groove; 57, sliding block; 58, adjusting screw; 6, cooling part; 61, water inlet hole; 62, water outlet hole; 7, crusher; 71, crushing shaft one; 72, crushing roller one; 73, transmission shaft; 74, conveying roller; 75, spiral rolling groove; 76, gap; 77, crushing shaft two; 78, crushing roller two; 79, guide inclined plate. DETAILED DESCRIPTION

[0050] The following is combined with Figures 1 to 14 This application is described in further detail.

[0051] The embodiment of the present application discloses a device and method for processing bottom ash of a thermal power plant boiler, which separates small granular bottom ash from large block bottom ash and breaks the large block bottom ash into smaller particles.

[0052] Embodiment 1:

[0053] Reference Figure 1 , Figure 2 and Figure 3 As shown, during the operation of the thermal power plant boiler, the combustion of fuel will produce a large amount of solid residues, which accumulate to form bottom ash. During the treatment of the bottom ash, the thermal power plant boiler will not operate, so the temperature of the bottom ash discharged from the slag outlet of the thermal power plant boiler is very high.

[0054] A boiler bottom ash treatment device for a thermal power plant comprises a support box 1. A feed hopper 2 is arranged on one side of the upper end of the support box 1.

[0055] When processing the boiler bottom ash, first connect the feed funnel 2 set on one side of the upper end of the support box 1 to the boiler slag outlet, and then open the boiler slag outlet. The bottom ash discharged from the slag outlet will enter the conveying cooler 4 set in the support box 1 along the feed funnel 2. The conveying cooler 4 will separate the small granular bottom ash from the large block bottom ash. The small granular bottom ash will directly fall onto the conveyor belt 3 set at the bottom of the support box 1, and then be discharged from the discharge port 11 opened on the support box 1 on the side of the conveying direction of the conveyor belt 3.

[0056] The large block bottom ash will be conveyed by the conveying cooler 4 to the crusher 7 arranged in the supporting box 1. The crusher 7 will crush the large block bottom ash into smaller particles, which will then fall onto the conveyor belt 3 and be discharged from the discharge port 11. At the same time, water is sprayed on the bottom ash during the transportation process to reduce the temperature of the bottom ash and prevent the high-temperature bottom ash from damaging subsequent equipment and facilities.

[0057] Reference Figure 4 , Figure 5 and Figure 6 As shown, specifically, the conveying cooler 4 includes an arc-shaped support frame 5 arranged on the support box 1, a gap 41 is reserved between the end of the arc-shaped support frame 5 away from the feed hopper 2 and the support box 1, and a conveying shaft 42 is symmetrically and rotatably penetrated on both sides of the support box 1, and the conveying shaft 42 is located in the arc-shaped support frame 5.

[0058] When the boiler bottom ash is processed, the bottom ash discharged from the slag discharge port will enter the arc-shaped support frame 5 along the feed funnel 2, and then the two conveying shafts 42 are driven to rotate relative to each other through the existing driving technology. The rotating driving shaft will drive the spiral blades 43 set on the conveying shaft 42, and the bottom ash will be transported to the gap 41 through the two spiral blades 43 with opposite rotation directions.

[0059] During this process, small granular bottom slag will pass through a plurality of slag discharge holes 51 opened on the arc-shaped support frame 5 and fall onto the conveyor belt 3, and then be discharged from the discharge port 11, while large block bottom slag will be transported to the gap 41 under the push of the spiral blades 43, and then enter the crusher 7 to be crushed into smaller particles.

[0060] At the same time, during the conveying process of the spiral blades 43, the two spiral blades 43 with opposite rotation directions will squeeze the large block bottom slag, so that the large block bottom slag is initially squeezed and cut by the two spiral blades 43, reducing the load of the subsequent crusher 7 and improving the crushing efficiency.

[0061] The two sides of the support box 1 are symmetrically provided with sliding grooves 44 , in which sliding blocks 45 are slidably arranged, and connecting blocks 451 are arranged on the two sliding blocks 45 on the same side.

[0062] By rotating the adjustment rod 46 that rotates and passes between the two connecting blocks 451, the adjustment rod 46 will force the connecting block 451 to move through the threaded connection with the two connecting blocks 451, and the moving connecting block 451 will drive the sliding block 45 connected to it. Since the conveying shaft 42 rotates and passes between the two sliding blocks 45 on the same side, the movement of the sliding block 45 will drive the two conveying shafts 42 to move closer to or away from each other, thereby changing the distance between the two spiral blades 43, which can adapt to bottom slag with different particle sizes and hardness and optimize the crushing effect.

[0063] That is, by rotating the adjusting rod 46, the adjusting rod 46 will force the connecting blocks 451 to move away from each other through the threaded connection with the two connecting blocks 451, so that the two connecting blocks 451 drive the sliding block 45 to move away from each other, thereby causing the conveying shaft 42 to drive the two spiral blades 43 to move away from each other, and the distance between the two spiral blades 43 increases to accommodate larger block bottom slag; conversely, that is, by rotating the adjusting rod 46, the adjusting rod 46 will force the connecting blocks 451 to move closer to each other through the threaded connection with the two connecting blocks 451, so that the two connecting blocks 451 drive the sliding block 45 to move closer to each other, thereby causing the conveying shaft 42 to drive the two spiral blades 43 to move closer to each other, and the distance between the two spirals decreases to accommodate smaller block bottom slag.

[0064] In order to adapt to the movement of the conveying shaft 42, a driving gear 47 is provided at one end of the conveying shaft 42. A connecting ring 48 is rotatably provided at one end of the conveying shaft 42. A telescopic pull rod 481 is provided on the connecting ring 48. The telescopic end of the telescopic pull rod 481 has the potential energy to always retract inward.

[0065] Through the existing driving technology, the driven shaft 482 that is jointly arranged on the telescopic ends of the two telescopic pull rods 481 is driven to rotate, and the rotating driven shaft 482 will drive the driven gear 49 arranged thereon to rotate together. The rotating driven gear 49 will drive the two conveying shafts 42 to rotate relative to each other by meshing with the driving gear 47.

[0066] When the conveying shafts 42 are moved closer to or farther from each other by rotating the adjusting rod 46 , the conveying shafts 42 will drive the connecting ring 48 , so that the telescopic pull rod 481 pulls the driven shaft 482 to move the driven gear 49 , and the driven gear 49 is always in meshing state with the driving gear 47 .

[0067] Reference Figure 7 As shown, a cooling member 6 is provided on the conveying shaft 42, and the cooling member 6 is used for spraying water to reduce the temperature of the bottom ash and prevent the high-temperature bottom ash from causing damage to subsequent equipment and facilities.

[0068] Specifically, the cooling member 6 includes a water inlet hole 61 opened on the conveying shaft 42. Cooling water is conveyed into the water inlet hole 61 through existing technology. The water flows in the water inlet hole 61 and then sprays out from a plurality of circumferentially distributed water outlet holes 62 opened on the conveying shaft 42. The water outlet holes 62 are located in the arc-shaped support frame 5 and spray water evenly on the bottom ash as the conveying shaft 42 rotates, so as to cool the bottom ash and reduce the temperature of the bottom ash.

[0069] At the same time, the sprayed water can cool the spiral blades 43, effectively reducing the temperature of the bottom slag and the spiral blades 43, preventing high temperature from causing damage to subsequent equipment and facilities, and improving the service life and cutting efficiency of the spiral blades 43.

[0070] Reference Figure 8 and Fig. 9 As shown, specifically, the crusher 7 includes a crushing shaft 71 symmetrically and rotatably arranged on the support box 1, and the crushing shaft 71 is located below the gap 41.

[0071] By driving one of the crushing shafts 71 to rotate, the rotating crushing shaft 71 will pull the other crushing shaft 71 through gear meshing transmission, so that the crushing shafts 71 can rotate relatively, that is, the two crushing shafts 71 are driven by gear meshing transmission.

[0072] The block bottom slag falling from the gap 41 will enter between the two crushing rollers 72 arranged on the crushing shaft 71, and the block bottom slag will be squeezed, sheared and crushed under the action of the crushing rollers 72.

[0073] At the same time, the support box 1 is symmetrically and rotatably provided with a transmission shaft 73 located below the crushing roller 72. By driving one of the transmission shafts 73 to rotate, the rotating transmission shaft 73 will drive the other transmission shaft 73 through gear meshing transmission, so that the transmission shafts 73 rotate relatively, that is, the two transmission shafts 73 are transmitted through gear meshing.

[0074] During the conveying process of the spiral blades 43, small granular bottom slag will pass through the slag discharge hole 51 and fall onto the conveying rollers 74 arranged on the two transmission shafts 73. When the two crushing rollers 72 rotate relative to each other, they exert extrusion force and shear force on the block bottom slag, further breaking it into smaller particles. At the same time, the bottom slag crushed by the crushing shaft 71 is discharged from between the crushing rollers 72 and also falls onto the two conveying rollers 74 to be squeezed and crushed.

[0075] The support box 1 is symmetrically provided with guide inclined plates 79 on both sides of the conveying roller 74. The guide inclined plates 79 are arranged at an angle, with the side close to the conveying roller 74 being lower and the side away from the conveying roller 74 being higher. The guide inclined plates 79 ensure that the falling bottom slag falls smoothly onto the conveying roller 74.

[0076] During this process, part of the water sprayed out of the water outlet 62 will pass through the slag discharge hole 51 and fall on the conveyor roller 74 to further cool the bottom slag, and then pass through the conveyor roller 74 and fall on the bottom of the conveyor belt 3 and the support box 1 to be discharged.

[0077] Embodiment 2:

[0078] Reference Fig. 9 , Fig.10 and Fig.11As shown, on the basis of Example 1, after the bottom slag falls through the slag discharge hole 51 and is squeezed and crushed by the crushing roller 72 and falls on the conveying roller 74, since the diameter of the conveying roller 74 away from the crushing roller 72 is smaller than the other end and is in a conical shape, and the opposite sides of the two conveying rollers 74 are parallel to each other, the bottom slag on the conveying roller 74 will move toward the end with a smaller diameter, and the bottom slag will be transported to the gap 76 reserved between the end of the conveying roller 74 away from the crushing shaft 71 and the support box 1.

[0079] In addition, the two conveying rollers 74 are provided with spiral rolling grooves 75 with opposite rotation directions. The rotating conveying rollers 74 will drive the spiral rolling grooves 75, and the bottom slag will be squeezed and crushed between the two conveying rollers 74, and then fall onto the conveyor belt 3 and be discharged from the discharge port 11. At the same time, the spiral rolling grooves 75 and the conical conveying rollers 74 will transport the remaining block bottom slag to the gap 76.

[0080] The support box 1 is symmetrically and rotatably provided with a crushing shaft 2 77 located below the gap 76. By driving one of the crushing shafts 2 77 to rotate, the rotating crushing shaft 1 71 will pull the other crushing shaft 2 77 through gear meshing transmission, so that the crushing shafts 2 77 can rotate relatively, that is, the two crushing shafts 2 77 are driven by gear meshing transmission.

[0081] The remaining bulk bottom slag falling from the gap 76 will enter between the two crushing rollers 78 , where the bulk bottom slag will be fully squeezed, sheared and crushed, and then fall onto the conveyor belt 3 and be discharged from the discharge port 11 .

[0082] Among them, one of the crushing shafts 1 71 is connected with one of the crushing shafts 2 77 through a belt drive. Only one of the crushing shafts 1 71 or the crushing shaft 2 77 needs to be driven to rotate, and the rotating crushing shaft 1 71 will drive the other crushing shaft 1 71 to rotate through the rotation of the gear. One of the rotating crushing shafts 1 71 will drive one of the crushing shafts 1 71 to rotate through the belt rotation, and the rotating crushing shaft 2 77 will drive the other crushing shaft 2 77 to rotate through the rotation of the gear.

[0083] Thereby, the crushing roller 1 72 and the crushing roller 2 78 are driven to rotate at the same time for crushing.

[0084] Embodiment three:

[0085] Reference Fig.12 Figure, 13 and Fig.14 As shown, on the basis of embodiment one and embodiment two, the arc-shaped support frame 5 includes an upper frame 52 arranged in the support box 1, a plurality of upper holes 53 are opened on the upper frame 52, a lower frame 54 is slidably arranged at the lower end of the upper frame 52, a sliding groove 56 is opened on the support box 1, and a sliding block 57 is slidably arranged in the sliding groove 56.

[0086] An adjusting screw 58 is provided on the rotating support box 1 through a bracket for rotation. The adjusting screw 58 drives the sliding block 57 to move in the sliding groove 56 through a threaded connection with the sliding block 57. The moving sliding block 57 drives it to move on the upper frame 52 through the connection with the lower frame 54. The moving lower frame 54 drives the lower hole 55 opened on the lower frame 54. Since the upper hole 53 and the lower hole 55 correspond one to one, the upper hole 53 and the lower hole 55 are connected to each other to form a slag discharge hole 51.

[0087] When the lower frame 54 moves, it drives the lower hole 55 to move, so that the lower hole 55 and the upper hole 53 overlap with each other. At this time, the slag discharge hole 51 formed by the upper hole 53 and the lower hole 55 being connected to each other can pass through large pieces of bottom slag. Conversely, when the lower frame 54 moves, it drives the lower hole 55 to move, so that the lower hole 55 and the upper hole 53 are staggered with each other, the slag discharge hole 51 formed by the upper hole 53 and the lower hole 55 being connected to each other can pass through small pieces of bottom slag.

[0088] The adjusting screw 58 drives the sliding block 57 to move in the sliding groove 56 through a threaded connection. The movement of the sliding block 57 drives the lower frame 54 to move on the upper frame 52. The movement of the lower frame 54 changes the position of the lower hole 55, thereby changing the overlap degree between the upper hole 53 and the lower hole 55. When the lower hole 55 overlaps with the upper hole 53, the slag discharge hole 51 is larger in size and can pass large blocks of bottom slag. When the lower hole 55 and the upper hole 53 are staggered with each other, the slag discharge hole 51 is smaller in size and can only pass small blocks of bottom slag.

[0089] Finally, the present invention also provides a method for treating bottom ash of a thermal power plant boiler, and the method for using the method comprises the following steps:

[0090] S1: When processing the boiler bottom ash, first connect the feed funnel 2 provided on one side of the upper end of the support box 1 to the boiler slag discharge port, and then open the boiler slag discharge port, and the bottom ash discharged from the discharge port 11 will enter the arc-shaped support frame 5 along the feed funnel 2.

[0091] S2: Then, the two conveying shafts 42 are driven to rotate relative to each other through the existing driving technology. The rotating conveying shafts 42 will drive the spiral blades 43 set on the conveying shafts 42, and the bottom slag will be transported to the gap 41 through the two spiral blades 43 with opposite rotation directions. The small granular bottom slag will pass through the multiple slag discharge holes 51 opened on the arc-shaped support frame 5 and fall onto the conveyor belt 3, and then be discharged from the discharge port 11, while the large block bottom slag will be transported to the gap 41 under the push of the spiral blades 43.

[0092] S3: Dust treatment: the block bottom slag falling from the gap 41 will enter between the two crushing rollers 72 arranged on the crushing shaft 71, and the block bottom slag will be squeezed, sheared and crushed under the action of the crushing roller 72.

[0093] S4: During the conveying process of the spiral blades 43, small granular bottom slag will pass through the slag discharge hole 51 and fall onto the conveying rollers 74 arranged on the two transmission shafts 73. When the two crushing rollers 72 rotate relative to each other, they exert extrusion force and shear force on the block bottom slag, further breaking it into smaller particles. At the same time, the bottom slag crushed by the crushing shaft 71 is discharged from between the crushing rollers 72 and also falls onto the two conveying rollers 74 to be squeezed and crushed.

[0094] S5: The bottom slag is squeezed and crushed between the two conveying rollers 74 , and then falls onto the conveyor belt 3 and is discharged from the discharge port 11 . Meanwhile, the spiral rolling groove 75 and the conical conveying roller 74 convey the remaining block bottom slag to the gap 76 .

[0095] S6: The remaining block bottom slag falling from the gap 76 will enter between the two crushing rollers 78, where the block bottom slag will be fully squeezed, sheared and crushed, and then fall onto the conveyor belt 3 and be discharged from the discharge port 11.

[0096] S7: The water outlet 62 is located in the arc-shaped support frame 5 and sprays water evenly on the bottom slag as the conveying shaft 42 rotates, so as to cool the bottom slag and reduce the temperature of the bottom slag. At the same time, the sprayed water can cool the spiral blade 43, effectively reducing the temperature of the bottom slag and the spiral blade 43, preventing high temperature from damaging subsequent equipment and facilities, and improving the service life and cutting efficiency of the spiral blade 43.

[0097] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler bottom ash treatment device for a thermal power plant, comprising a support box (1), characterized in that: A feeding hopper (2) is arranged on one side of the upper end of the support box (1), a conveyor belt (3) is arranged at the bottom of the support box (1), a discharge port (11) is opened on the support box (1) and is located on one side of the conveying direction of the conveyor belt (3), and a conveying cooler (4) is arranged inside the support box (1); The conveying cooler (4) comprises an arc-shaped support frame (5) arranged on a support box (1), a gap (41) is reserved between the end of the arc-shaped support frame (5) away from the feed hopper (2) and the support box (1), and a conveying shaft (42) is symmetrically and rotatably penetrated on both sides of the support box (1), the conveying shaft (42) is located in the arc-shaped support frame (5), and spiral blades (43) are arranged on the conveying shaft (42), and the rotation directions of the two spiral blades (43) are opposite.

2. A thermal power plant boiler bottom ash treatment device according to claim 1, characterized in that: The conveying cooler (4) also includes a plurality of slag discharge holes (51) provided on the arc-shaped support frame (5), sliding grooves (44) are symmetrically provided on both sides of the support box (1), a sliding block (45) is slidably arranged in the sliding groove (44), and the conveying shaft (42) rotates and passes between two sliding blocks (45) on the same side.

3. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: The two sliding blocks (45) on the same side are both provided with a connecting block (451), and an adjusting rod (46) threadedly connected to the two connecting blocks (451) is rotatably passed through the two connecting blocks (451).

4. A thermal power plant boiler bottom ash treatment device according to claim 1, characterized in that: A driving gear (47) is provided at one end of the conveying shaft (42); a connecting ring (48) is rotatably provided at one end of the conveying shaft (42); a telescopic pull rod (481) is provided on the connecting ring (48); a driven shaft (482) is rotatably provided at the telescopic ends of the two telescopic pull rods (481); and a driven gear (49) meshing with the driving gear (47) is provided on the driven shaft (482).

5. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: The arc-shaped supporting frame (5) comprises an upper frame (52) arranged in the supporting box (1), a plurality of upper holes (53) being provided on the upper frame (52), a lower frame (54) being slidably provided at the lower end of the upper frame (52), lower holes (55) corresponding to the upper holes (53) being provided on the lower frame (54), and the upper holes (53) and the lower holes (55) being connected to each other to form a slag discharge hole (51).

6. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: The support box (1) is provided with a sliding groove (56), a sliding block (57) connected to the lower frame (54) is slidably arranged in the sliding groove (56), and an adjusting screw (58) threadedly connected to the sliding block (57) is rotatably arranged on the support box (1) through a bracket.

7. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: The conveying shaft (42) is provided with a cooling element (6); The cooling element (6) comprises a water inlet hole (61) opened on the conveying shaft (42), and a plurality of circumferentially distributed water outlet holes (62) are opened on the conveying shaft (42), and the water outlet holes (62) are located in the arc-shaped supporting frame (5).

8. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: The support box (1) is provided with a crusher (7) located inside the support box (1); The crusher (7) comprises a crushing shaft (71) symmetrically and rotatably arranged on the support box (1), and the crushing shaft (71) is located below the gap (41), and a crushing roller (72) is arranged on the crushing shaft (71).

9. The device for treating bottom ash of a thermal power plant boiler according to claim 1, characterized in that: A transmission shaft (73) is symmetrically and rotatably provided on the support box (1), and a conveying roller (74) is provided on the transmission shaft (73).

10. A method for treating bottom ash of a thermal power plant boiler, using a device for treating bottom ash of a thermal power plant boiler according to any one of claims 1 to 9, characterized in that: The method of use includes the following steps: S1: When processing the boiler bottom ash, first connect the feed funnel (2) provided on one side of the upper end of the support box (1) to the boiler slag discharge port, then open the boiler slag discharge port, and the bottom ash discharged from the slag discharge port flows along the feed funnel (2) into the arc-shaped support frame (5); S2: Then, the two conveying shafts (42) are driven to rotate relative to each other by the existing driving technology, and the bottom slag is conveyed to the gap (41) by the spiral blade (43). The small granular bottom slag passes through the slag discharge hole (51) and falls on the conveyor belt (3), and then is discharged from the outlet, while the large block bottom slag is conveyed to the gap (41) under the push of the spiral blade (43); S3: The block bottom slag falling from the gap (41) enters between the two crushing rollers (72) arranged on the crushing shaft (71), and the block bottom slag is squeezed, sheared and crushed under the action of the crushing roller (72); S4: During the conveying process of the spiral blades (43), small granular bottom slag passes through the slag discharge hole (51) and falls onto the conveying rollers (74) arranged on the two transmission shafts (73). The two crushing rollers (72) exert extrusion force and shear force on the block bottom slag during relative rotation to crush it into small particles. At the same time, the bottom slag crushed by the crushing shaft (71) is discharged from between the crushing rollers (72) and also falls onto the two conveying rollers (74) to be squeezed and crushed. S5: The bottom slag is squeezed and crushed between the two conveying rollers (74), and then falls onto the conveyor belt (3) and is discharged from the discharge port (11).

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