A slag cooler for circulating fluidized bed boilers

Abstract

The utility model discloses a cold ash separator for circulating fluidized bed boiler belongs to cold ash separator deslagging technical field. It mainly includes the fixed frame, and the fixed frame rear end rotation is connected with the drum, and the drum rear end rotation is connected with the fixed cylinder, and the fixed connection with the cooling assembly on the drum inner wall, and the cooling assembly right -hand member rotation is connected with the two -way rotary joint, and the two -way rotary joint outer wall is fixedly connected with the fixed cylinder, and the fixed connection with the screening swing frame on the drum front portion inner wall, and the fixed crushing assembly is established in the screening swing frame, and the fixed connection with the sprocket ring in the drum outer wall middle part, and the drive assembly is equipped with in the sprocket ring bottom part. The utility model discloses a crushing assembly is arranged, and the crushing swing ring rotates together with the drum, and the fixed baffle ring is handled to the rotary extrusion crushing of the furnace slag of entering the drum, avoids the jam of large -size furnace slag in the drum, and the situation of incomplete cooling. The utility model mainly is used to carry out the cooling of furnace slag.

Description

Technical Field

[0001] This utility model belongs to the field of slag discharge technology for slag coolers, and more specifically, it relates to a slag cooler for circulating fluidized bed boilers. Background Technology

[0002] The slag cooler is an important component of a circulating fluidized bed boiler. Its main function is to cool the high-temperature slag discharged from the bottom of the furnace to a temperature that the slag removal equipment can withstand, while recovering the heat energy from the slag discharge.

[0003] Chinese patent publication number "CN220269361U" discloses a slag cooler for a circulating fluidized bed boiler, including a tank body and a flare. A slag removal port is provided on the upper part of the tank body and near the slag inlet. The slag removal port penetrates the tank body and is matched with the flare. The flare is flipped and connected to the tank body and can block the slag removal port. When a blockage occurs near the slag inlet of the slag cooler, maintenance personnel only need to open the flare blocking the slag removal port and then insert tools into the slag removal port to poke or remove slag to clear the blockage. In this way, maintenance personnel do not need to poke or remove slag from the slag outlet of the slag cooler, thereby improving the maintenance efficiency.

[0004] During later use, the device still had the following problems: it could only passively deal with slag blockage and could not actively avoid it, so maintenance personnel still had to frequently deal with it at the risk of burns, and the working efficiency of the slag cooler was only slightly improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a slag cooler for a circulating fluidized bed boiler. By setting up a crushing component, the crushing ring rotates together with the drum and works with the fixed baffle ring to rotate, squeeze and crush the slag entering the drum, so as to avoid the blockage of large-sized slag in the drum and the incomplete cooling.

[0006] A slag cooler for a circulating fluidized bed boiler includes a fixed frame, a drum rotatably connected to the rear end of the fixed frame, a fixed cylinder rotatably connected to the rear end of the drum, a discharge pipe fixedly connected to the bottom of the fixed cylinder, a cooling component fixedly connected to the inner wall of the drum, a bidirectional rotary joint rotatably connected to the right end of the cooling component, the outer wall of the bidirectional rotary joint being fixedly connected to the fixed cylinder, a guide plate fixedly connected to the inner wall of the drum, a screening frame fixedly connected to the inner wall of the front part of the drum, a crushing component fixedly installed inside the screening frame, a feed inlet fixedly opened on the front side wall of the drum, the feed inlet being rotatably connected to the fixed frame, a sprocket ring fixedly connected to the middle of the outer wall of the drum, a drive component installed at the bottom of the sprocket ring, and ring rails fixedly connected to both sides of the sprocket ring, the ring rails slidingly contacting multiple sets of support wheel frames.

[0007] Preferably, the drive assembly includes a drive motor, the output shaft of which is fixedly connected to a sprocket, and a chain is meshed and driven on the sprocket, with the chain meshing and driving with the sprocket ring.

[0008] Preferably, the cooling component includes a water inlet, an inlet ring fixedly connected to the outer wall of the water inlet, a cooling pipe fixedly connected to the rear side wall of the water inlet ring, a water passage ring fixedly connected to the rear end of the cooling pipe, an outlet ring fixedly connected to the front end of the water passage ring through another set of cooling pipes, an outlet pipe fixedly connected to the inner wall of the outlet ring, and both the outlet pipe and the water inlet are rotatably connected to a bidirectional rotary joint.

[0009] Preferably, a slag inlet pipe is fixedly installed on the top of the fixing frame, the slag inlet pipe extends rearward into the inside of the drum, and a fixing retaining ring is fixedly connected to the rear end of the fixing frame.

[0010] Preferably, the inner wall of the screening frame is fixedly connected with multiple sets of guide plates, a return cone extends forward on the rear inner wall of the screening frame, multiple baffles extend outward on the side wall of the return cone, and multiple support rods extend outward on the rear outer wall of the screening frame, with the other end of the support rods fixedly connected to the inner wall of the drum.

[0011] Preferably, the crushing assembly includes a crushing rotating ring, a fixing ring is fixedly connected to the outer wall of the crushing rotating ring, and the fixing ring is fixedly connected to the screening rotating frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up the crushing components, the crushing ring rotates together with the drum, and works with the fixed retaining ring to rotate and crush the slag entering the drum, avoiding blockage and incomplete cooling of large-sized slag in the drum; 2. By setting up a cooling component, cold water flows from the inlet pipe through the inlet ring into the cooling pipe. The cooling pipe is equipped with multiple sets to contact and cool the slag on the drum. The heated hot water is discharged from the outlet pipe for heat energy recovery and utilization. 3. By setting up a screening rack, the crushed slag is further screened, and the fine slag falls into the inner wall of the drum for cooling. At the same time, the return cone set at the rear end of the screening rack can transport the large slag particles screened out to the crushing component for further crushing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural diagram of the fixing frame and fixing cylinder; Figure 3 This is a schematic diagram of the external structure of the drum; Figure 4 This is a schematic diagram of the internal structure of the drum; Figure 5 This is a schematic diagram of the cooling component structure; Figure 6 This is a schematic diagram of the internal structure of the screening rotating frame; Figure 7 This is a schematic diagram of the structure of the crushing rotating ring and the fixed retaining ring; Figure 8 This is a structural diagram of the crushing rotating ring, the return cone, and the baffle. Figure 9 This is a structural diagram of the return cone and baffle. Figure 10 This is a schematic diagram of the explosion of the fixed retaining ring and the breaking rotating ring.

[0014] In the diagram, 1. Fixed frame; 101. Slag inlet pipe; 102. Fixed retaining ring; 2. Drum; 201. Ring rail; 202. Sprocket ring; 203. Guide plate one; 204. Feed inlet; 3. Drive assembly; 301. Drive motor; 302. Sprocket; 303. Chain; 4. Fixed cylinder; 401. Discharge pipe; 5. Bidirectional rotary joint; 6. Cooling assembly; 601. Water inlet; 602. Water inlet ring; 603. Cooling pipe; 604. Water circulation ring; 605. Water outlet ring; 606. Water outlet; 7. Screening rotating frame; 701. Guide plate two; 702. Return cone; 703. Baffle; 704. Support rod; 8. Crushing assembly; 801. Crushing rotating ring; 802. Fixed ring. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] like Figure 1 , Figure 3 and Figure 4As shown, a slag cooler for a circulating fluidized bed boiler includes a fixed frame 1, a drum 2 rotatably connected to the rear end of the fixed frame 1, a fixed cylinder 4 rotatably connected to the rear end of the drum 2, and a discharge pipe 401 fixedly connected to the bottom of the fixed cylinder 4. Slag enters the drum 2 through the slag inlet pipe 101 of the fixed frame 1, and is discharged from the fixed cylinder 4 after cooling treatment. A cooling component 6 is fixedly connected to the inner wall of the drum 2. Through the cooling component 6, cold water flows from the water inlet 601 through the water inlet ring 602 into the cooling pipe 603. The cooling pipe 603 has multiple sets, which contact and cool the slag in the drum 2. The heated hot water is discharged from the water outlet 606 for heat recovery. A bidirectional rotary joint 5 is rotatably connected to the right end of the cooling component 6. The bidirectional rotary joint is existing technology and can be purchased directly.

[0017] The outer wall of the bidirectional rotary joint 5 is fixedly connected to the fixed cylinder 4. A guide plate 203 is also fixedly connected to the inner wall of the drum 2. Under the push of the guide plate 203, the slag rolls inside the drum 2, so that the slag comes into contact with the cooling pipe 603 evenly for cooling. At the same time, the slag is continuously pushed backward, so that the cooled slag is discharged from the discharge pipe 401 of the fixed cylinder 4. A screening frame 7 is fixedly connected to the inner wall of the front part of the drum 2. By setting the screening frame 7, the crushed slag is further screened, and the fine slag falls into the inner wall of the drum 2 for cooling. This avoids the direct cooling of large-sized slag, which increases the probability of blockage. In addition, due to its large size, the large-sized slag cannot come into contact with the cooling pipe 603 fully and evenly for cooling. At the same time, the return cone 702 set at the rear end of the screening frame 7 can transport the screened large-particle slag back to the crushing component 8 for further crushing.

[0018] The screening frame 7 is internally equipped with a crushing component 8. The crushing rotating ring 801 and the fixed retaining ring 102 are both fixedly connected to crushing tooth sets. By setting the crushing component 8, the crushing rotating ring 801 rotates together with the drum 2, and works with the fixed retaining ring 102 to rotate and crush the slag entering the drum 2, avoiding blockage and incomplete cooling of large-sized slag in the drum 2. A feed inlet 204 is fixedly opened on the front side wall of the drum 2. The feed inlet 204 is rotatably connected to the fixed frame 1. A sprocket ring 202 is fixedly connected to the middle of the outer wall of the drum 2. A drive component 3 is provided at the bottom of the sprocket ring 202. By setting the drive component 3, the drum 2 is rotated. At the same time, the application of the chain 303 allows the drive motor 301 to be separated from the drum 2, avoiding the high temperature of the drum 2 from affecting the drive motor 301. Ring rails 201 are fixedly connected to both sides of the sprocket ring 202. The ring rails 201 slide in contact with multiple sets of support wheel frames. The support wheel frame is fixed on the base plate. Four sets of support wheel frames support the ring rail 201 upwards, while the remaining two sets of support wheel frames support and limit the side end face of the ring rail 201 to prevent the roller 2 from sliding axially.

[0019] like Figure 2 As shown, the drive assembly 3 includes a drive motor 301. The output shaft of the drive motor 301 is fixedly connected to a sprocket 302. A chain 303 is meshed and driven on the sprocket 302, and the chain 303 is meshed and driven with the sprocket ring 202. The drive motor 301 is fixed on the base plate, drives the sprocket 302 to rotate, and drives the drum 2 to rotate through the chain 303, thereby continuously crushing, screening and cooling the slag.

[0020] like Figure 5 As shown, the cooling component 6 includes a water inlet 601. A water inlet ring 602 is fixedly connected to the outer wall of the water inlet 601. A cooling pipe 603 is fixedly connected to the rear side wall of the water inlet ring 602. A water flow ring 604 is fixedly connected to the rear end of the cooling pipe 603. A water outlet ring 605 is fixedly connected to the front end of the water flow ring 604 through another set of cooling pipes 603. A water outlet 606 is fixedly connected to the inner wall of the water outlet ring 605. Both the water outlet 606 and the water inlet 601 are rotatably connected to the bidirectional rotary joint 5. Cold water enters from the water inlet 601 through the bidirectional rotary joint 5, passes through the water inlet ring 602 into the cooling pipe 603, then flows through the water flow ring 604 from the other set of cooling pipes 603 into the water outlet ring 605, and finally exits from the bidirectional rotary joint 5 through the water outlet 606.

[0021] like Figure 7 As shown, a slag inlet pipe 101 is fixedly installed on the top of the fixed frame 1. The slag inlet pipe 101 extends rearward into the interior of the drum 2, and a fixed retaining ring 102 is fixedly connected to the rear end of the fixed frame 1. The slag falls directly into the crushing assembly 8 through the slag inlet pipe 101.

[0022] like Figure 6 , Figure 8 and Figure 9 As shown, multiple sets of guide plates 701 are fixedly connected to the inner wall of the screening rotating frame 7. A return cone 702 extends forward on the rear inner wall of the screening rotating frame 7. Multiple sets of baffles 703 extend outward on the side wall of the return cone 702. Multiple sets of support rods 704 extend outward on the rear outer wall of the screening rotating frame 7. The other end of the support rod 704 is fixedly connected to the inner wall of the drum 2. By setting the baffles 703, circumferential movement of slag on the return cone 702 is prevented. As the screening rotating frame 7 rotates, the crushed slag is continuously turned over by the guide plates 701 for screening and large-sized slag is pushed backward to the area of ​​the return cone 702. Due to the obstruction of the baffles 703, the large-sized slag gradually rotates to the upper part of the return cone 702. Under the action of gravity, the slag begins to contact the surface of the return cone 702 and slides down the return cone 702, returning to the crushing assembly 8 for secondary crushing.

[0023] like Figure 10As shown, the crushing assembly 8 includes a crushing rotating ring 801, with a fixed ring 802 fixedly connected to the outer wall of the crushing rotating ring 801. The fixed ring 802 is fixedly connected to the screening rotating frame 7. The cross-section of the crushing rotating ring 801 is triangular. The crushing rotating ring 801 cooperates with the fixed retaining ring 102. The closer to the center, the larger the gap between the crushing rotating ring 801 and the fixed retaining ring 102. As the slag is gradually crushed, its volume becomes smaller and smaller, and finally falls through the gap between the crushing rotating ring 801 and the fixed retaining ring 102, completing the crushing operation.

[0024] This invention features a crushing assembly 8, in which a crushing rotating ring 801 rotates with the drum 2, working in conjunction with a fixed retaining ring 102 to rotate and crush the slag entering the drum 2, preventing large-sized slag from clogging the drum 2 and causing incomplete cooling. A cooling assembly 6 is also included, where cold water flows from the inlet pipe 601 through the inlet ring 602 into the cooling pipe 603. Multiple sets of cooling pipes 603 contact the slag in the drum 2 for cooling, and the heated water is discharged from the outlet pipe 606 for heat recovery. A screening frame 7 further screens the crushed slag, allowing finer slag to fall onto the inner wall of the drum 2 for cooling. Simultaneously, a return cone 702 at the rear of the screening frame 7 transports the screened large slag particles back to the crushing assembly 8 for further crushing.

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