Steam reheating device driven by waste heat of boiler

Abstract

The utility model discloses a boiler waste heat driven steam reheating device which comprises a reheating plate and further comprises a heating mechanism, the heating mechanism is arranged in the reheating plate and comprises a hopper, a driving shaft, a driven shaft, a smashing roller, a gear, a motor, a steam conveying pipe, a steam inlet pipe and a steam discharging pipe, the hopper is welded to the top end of the reheating plate, and the driving shaft and the driven shaft are welded to the top end of the reheating plate. A driving shaft and a driven shaft are symmetrically installed in the hopper through bearings, slag entering the hopper falls into a reheating plate after being smashed by a smashing roller and slides down along the top of a steam conveying pipe, and recycled steam after acting is discharged into the steam conveying pipe to be conveyed. In the conveying process, waste heat of the furnace slag is used for carrying out heating preheating treatment on steam after acting, the temperature of the steam is increased, the steam obtained after primary heating is discharged into the reheater, then reheating is carried out through the reheater, reheating energy consumption is reduced, and the heat energy utilization rate of a boiler system is increased.

Description

Technical Field

[0001] This utility model relates to the field of steam utilization technology, and in particular to a steam reheating device driven by boiler waste heat. Background Technology

[0002] Steam utilization refers to the process of using steam as an energy carrier to convert thermal energy into mechanical energy or electrical energy. It is widely used in industry, power generation, heating and other fields. Steam is generated by heating in a boiler and drives a turbine or mechanical device to do work. Its high pressure and high temperature characteristics are suitable for driving equipment or generating electricity. Low pressure steam is used for heating, drying and other processes. It has a wide range of applications. Steam reheating refers to the process of returning steam that has done work to the boiler's reheater for reheating during the steam power cycle. Reheating improves the quality of the steam, so that it can be used to do work again.

[0003] The existing boiler steam has the following drawbacks in use: the existing steam reheating is generally carried out by the boiler's matching reheater. The steam to be reheated after the work is done is directly put into the reheater for reheating, which results in high energy consumption of the reheater. At the same time, the waste heat of slag and flue gas during boiler operation is not fully utilized. Therefore, we propose a boiler waste heat driven steam reheating device. Utility Model Content

[0004] The main purpose of this utility model is to provide a steam reheating device driven by boiler waste heat. By setting a heating mechanism inside the reheating plate, the recovered steam after work is heated by using the waste heat of boiler slag and flue gas, and then reheated by the reheater, reducing energy consumption and improving thermal energy utilization rate, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A boiler waste heat-driven steam reheating device includes a reheating plate and a heating mechanism. The heating mechanism is installed inside the reheating plate. The heating mechanism includes a hopper, a drive shaft, a driven shaft, a crushing roller, gears, a motor, a steam delivery pipe, a steam inlet pipe, and a steam exhaust pipe. The hopper is welded to the top end of the reheating plate. The drive shaft and driven shaft are symmetrically installed inside the hopper via bearings. Crushing rollers located inside the hopper are welded to the outer periphery of both the drive shaft and driven shaft. Gears are connected to the outer periphery of both the drive shaft and driven shaft via keys, and the gears mesh with each other. The power output end of the motor is connected to the end of the drive shaft. A steam delivery pipe is welded inside the reheating plate. A steam inlet pipe extending to the outside of the reheating plate is welded to the bottom end of the steam delivery pipe, and a steam exhaust pipe is welded to the end of the steam delivery pipe away from the steam inlet pipe.

[0007] Furthermore, it also includes an auxiliary mechanism. The bottom of the reheating plate is provided with an auxiliary mechanism, which includes a flue gas heating pipe and a flue gas inlet pipe. The flue gas heating pipe is welded to the bottom of the reheating plate, and the top of the flue gas heating pipe is attached to the bottom of the steam conveying pipe. The bottom end of the flue gas heating pipe is welded to a flue gas inlet pipe that is connected to the boiler flue gas discharge pipe. The flue gas heating pipe is welded to the bottom of the reheating plate, and the top of the flue gas heating pipe is attached to the bottom of the steam conveying pipe. The flue gas inlet pipe is connected to the flue gas discharge end of the boiler. During the boiler operation, the high-temperature flue gas generated is discharged from the flue gas discharge end, and part of the flue gas is transported to the inside of the flue gas heating pipe through the flue gas inlet pipe. The waste heat of the flue gas can be used to heat the steam inside the steam conveying pipe from the bottom, further improving the thermal energy utilization rate. The flue gas after use flows back to the boiler flue gas discharge end for discharge.

[0008] Furthermore, guide plates are obliquely welded to both sides of the inner wall at the top of the hopper, and the bottom of the guide plates extends to the space between the crushing rollers. Mounting frames are welded to both sides of the outer wall of the hopper, and mounting holes are opened inside the mounting frames. The guide plates allow the slag falling into the hopper to enter the space between the crushing rollers. The hopper is fixed to the inside of the boiler by fasteners through the mounting frames and mounting holes.

[0009] Furthermore, a condensate drain pipe extending to the outside of the boiler is welded to the end of the steam conveying pipe away from the hopper, and a valve is installed inside the condensate drain pipe; the condensate generated inside the steam conveying pipe can be recovered and discharged through the condensate drain pipe, and the opening and closing of the condensate drain pipe is controlled by the valve.

[0010] Furthermore, a sprocket A is connected to the outer periphery of the drive shaft away from the gear via a key. A spring is installed at the end of the reheat plate's outer wall, and a horizontal plate is movably connected to the spring. A rod that penetrates the spring and is inserted into the top of the reheat plate is welded to the surface of the horizontal plate. A guide ring is welded to the side of the reheat plate, and a limiting rod that penetrates the guide ring is welded to the end of the horizontal plate. A drive shaft is movably connected to the inner periphery of the reheat plate away from the limiting rod via a bearing. A sprocket B and a cam are installed on the outer periphery of the drive shaft. A chain is connected between sprocket A and sprocket B. The belt has a convex plate welded to the end of the horizontal plate, corresponding to the position of the cam. When the drive shaft rotates, it drives the rotation of the transmission shaft and the cam through the cooperation of sprocket A, sprocket B and chain belt. During the rotation of the cam, its convex end does not abut against the convex plate. When the convex end of the cam is in contact with the convex plate, it pushes the horizontal plate and stretches the spring, which drives the insertion rod to move. When the convex end of the cam moves away from the convex plate, the spring drives the horizontal plate and the insertion rod to reset. This cycle continues. During use, the insertion rod moves continuously, which can avoid the problem of blockage during the discharge of slag along the inside of the reheat plate.

[0011] Furthermore, a flue gas exhaust pipe is welded to the end of the flue gas heating pipe away from the flue gas inlet pipe; the flue gas from the boiler after use is discharged along the flue gas exhaust pipe.

[0012] Compared with the prior art, this utility model has the following advantages: After the reheating plate and the hopper are fixed, they are installed in a suitable position inside the boiler using fasteners, so that the hopper is located at the discharge end of the chain grate inside the boiler. The slag after combustion at the top of the chain grate can be discharged into the hopper. The end of the drive shaft at the top of the hopper penetrates the boiler. At the same time, the motor is installed on the outer wall of the boiler, and the power end is connected to the drive shaft through a reducer. The steam inlet pipe is connected to the steam outlet pipe after work is done. The steam outlet pipe is connected to the reheater. During use, the motor drives the drive shaft to rotate, and the crushing roller rotates inside the hopper through gear meshing. The slag entering the hopper is crushed by the crushing roller and falls into the reheating plate and slides down the top of the steam conveying pipe. The recovered steam after work is discharged into the steam conveying pipe. The steam is transported internally, and during this process, the waste heat of the slag is used to preheat the steam after it has been used to increase its temperature. The preheated steam is then discharged into the reheater and reheated, reducing reheating energy consumption and improving the thermal efficiency of the boiler system. A flue gas heating pipe is welded to the bottom of the reheating plate, and the top of the flue gas heating pipe is attached to the bottom of the steam conveying pipe. The flue gas inlet pipe is connected to the flue gas outlet of the boiler. During boiler operation, the high-temperature flue gas generated is discharged from the flue gas outlet, and part of the flue gas is transported to the flue gas heating pipe through the flue gas inlet pipe. The waste heat of the flue gas can be used to heat the steam inside the steam conveying pipe from the bottom, further improving the thermal efficiency. The used flue gas is then returned to the boiler flue gas outlet for discharge. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the boiler waste heat driven steam reheating device of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of the hopper and reheat plate of the boiler waste heat driven steam reheating device of this utility model.

[0015] Figure 3 This is a top view of the top structure of the hopper of the boiler waste heat driven steam reheating device of this utility model.

[0016] Figure 4 This is a schematic diagram of the connection between the reheat plate and the horizontal plate in the boiler waste heat driven steam reheating device of this utility model.

[0017] In the diagram: 1. Reheating plate; 2. Heating mechanism; 201. Hopper; 202. Guide plate; 203. Mounting bracket; 204. Mounting hole; 205. Drive shaft; 206. Driven shaft; 207. Crushing roller; 208. Gear; 209. Sprocket A; 210. Motor; 211. Steam conveying pipe; 212. Steam inlet pipe; 213. Steam exhaust pipe; 214. Condensate exhaust pipe; 215. Valve; 216. Spring; 217. Horizontal plate; 218. Insert rod; 219. Guide ring; 220. Limiting rod; 221. Drive shaft; 222. Sprocket B; 223. Chain belt; 224. Cam; 225. Protruding plate; 3. Auxiliary mechanism; 301. Flue gas heating pipe; 302. Flue gas inlet pipe; 303. Flue gas exhaust pipe. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figure 1-4 As shown, the boiler waste heat driven steam reheating device includes a reheating plate 1 and a heating mechanism 2. The heating mechanism 2 is installed inside the reheating plate 1. The heating mechanism 2 includes a hopper 201, a drive shaft 205, a driven shaft 206, a crushing roller 207, a gear 208, a motor 210, a steam conveying pipe 211, a steam inlet pipe 212, and a steam outlet pipe 213. The hopper 201 is welded to the top end of the reheating plate 1. The drive shaft 205 and the driven shaft 206 are symmetrically installed inside the hopper 201 via bearings. Crushing rollers 207 located inside the hopper 201 are welded to the outer periphery of the drive shaft 205 and the driven shaft 206. Gears 208 are connected by keys to the outer ends of the drive shaft 205 and the driven shaft 206 located outside the hopper 201, and the gears 208 mesh with each other. The power output end of the motor 210 is connected to the end of the drive shaft 205. A steam conveying pipe 211 is welded inside the reheating plate 1. A steam inlet pipe 212 extending to the outside of the reheating plate 1 is welded to the bottom end of the steam conveying pipe 211, and a steam exhaust pipe 213 is welded to the end of the steam conveying pipe 211 away from the steam inlet pipe 212.

[0020] The system also includes an auxiliary mechanism 3. The bottom of the reheat plate 1 is equipped with the auxiliary mechanism 3, which includes a flue gas heating pipe 301 and a flue gas inlet pipe 302. The flue gas heating pipe 301 is welded to the bottom of the reheat plate 1, and the top of the flue gas heating pipe 301 is attached to the bottom of the steam conveying pipe 211. The bottom end of the flue gas heating pipe 301 is welded to the flue gas inlet pipe 302, which is connected to the boiler flue gas discharge pipe. The flue gas heating pipe 301 is welded to the bottom of the reheat plate 1, and the top of the flue gas heating pipe 301 is attached to the bottom of the steam conveying pipe 211. The flue gas inlet pipe 302 is connected to the flue gas discharge end of the boiler. During the boiler operation, the high-temperature flue gas generated is discharged from the flue gas discharge end, and part of the flue gas is transported to the inside of the flue gas heating pipe 301 through the flue gas inlet pipe 302. The waste heat of the flue gas can be used to heat the steam inside the steam conveying pipe 211 from the bottom, further improving the thermal energy utilization rate. The flue gas after use flows back to the boiler flue gas discharge end for discharge.

[0021] The hopper 201 has guide plates 202 welded obliquely to both sides of its inner top wall, with the bottom of the guide plates 202 extending between the crushing rollers 207. The hopper 201 has mounting brackets 203 welded to both sides of its outer wall, with mounting holes 204 inside each bracket. A condensate drain pipe 214 extending to the outside of the boiler is welded to the end of the steam conveying pipe 211 away from the hopper 201. A valve 215 is installed inside the condensate drain pipe 214. The guide plates 202 allow the slag falling into the hopper 201 to enter the position between the crushing rollers 207. The hopper 201 is fixed to the inside of the boiler by fasteners using the mounting brackets 203 and mounting holes 204. The condensate generated inside the steam conveying pipe 214 can be recovered and discharged externally. The valve 215 controls the opening and closing of the condensate drain pipe 214.

[0022] The drive shaft 205 has a sprocket A209 connected to its outer periphery away from the gear 208 via a key. A spring 216 is installed on the outer wall of the reheat plate 1, and a horizontal plate 217 is movably connected to it via the spring 216. A rod 218, penetrating the spring 216 and inserted into the top of the reheat plate 1, is welded to the surface of the horizontal plate 217. A guide ring 219 is welded to the side of the reheat plate 1, and a limiting rod 220, penetrating the interior of the guide ring 219, is welded to the end of the horizontal plate 217. A drive shaft 221 is movably connected to the reheat plate 1, away from the limiting rod 220, via a bearing. A sprocket B222 and a cam 224 are installed on the outer periphery of the drive shaft 221. A chain belt 223 connects the sprocket A209 and the sprocket B222. The end of the horizontal plate 217 is welded with a protruding plate 225 corresponding to the position of the cam 224. When the drive shaft 205 rotates, it drives the transmission shaft 221 and the cam 224 to rotate through the cooperation of sprocket A209, sprocket B222 and chain belt 223. During the rotation, the protruding end of the cam 224 abuts against the protruding plate 225. When the protruding end of the cam 224 is in contact with the protruding plate 225, it pushes the horizontal plate 217 and stretches the spring 216, which drives the insertion rod 218 to move. When the protruding end of the cam 224 moves away from the protruding plate 225, the spring 216 drives the horizontal plate 217 and the insertion rod 218 to reset. This cycle continues. During use, the insertion rod 218 moves continuously, which can prevent the slag from getting blocked during the discharge process inside the reheat plate 1.

[0023] The flue gas heating pipe 301 is welded to a flue gas exhaust pipe 303 at the end away from the flue gas inlet pipe 302; the flue gas from the boiler after use is discharged through the flue gas exhaust pipe 303.

[0024] It should be noted that this utility model is a steam reheating device driven by boiler waste heat. During operation, the reheating plate 1 is fixed to the hopper 201 and then installed in a suitable position inside the boiler using fasteners, so that the hopper 201 is located at the discharge end of the chain grate inside the boiler. The slag after combustion at the top of the chain grate can be discharged into the hopper 201. The end of the drive shaft 205 at the top of the hopper 201 penetrates the boiler. At the same time, the motor 210 is installed on the outer wall of the boiler, and the power end is connected to the drive shaft 205 through a reducer. The steam inlet pipe 212 is connected to the steam discharge pipe after work, and the steam outlet pipe 213 is connected to the reheater. During use, the motor 210 drives the drive shaft 205 to rotate, and the crushing roller 207 rotates inside the hopper 201 through the meshing of the gear 208. The slag entering the hopper 201 is crushed by the crushing roller 207 and falls into the reheating plate 1 and flows down the top of the steam conveying pipe 211. After the work is completed, the steam is discharged into the steam conveying pipe 211 for transport. During the transport process, the residual heat of the slag is used to preheat the steam to increase its temperature. The preheated steam is discharged into the reheater and then reheated, reducing reheating energy consumption and improving the thermal energy utilization rate of the boiler system. A flue gas heating pipe 301 is welded to the bottom of the reheating plate 1, and the top of the flue gas heating pipe 301 is attached to the bottom of the steam conveying pipe 211. The flue gas inlet pipe 302 is connected to the flue gas outlet end of the boiler. During the operation of the boiler, the high-temperature flue gas generated is discharged from the flue gas outlet end, and part of the flue gas is transported to the flue gas heating pipe 301 through the flue gas inlet pipe 302. The residual heat of the flue gas can be used to heat the steam inside the steam conveying pipe 211 from the bottom, further improving the thermal energy utilization rate. The flue gas after use flows back to the flue gas outlet end of the boiler for discharge.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler waste heat driven steam reheating device, comprising a reheating plate (1), characterized in that, It also includes a heating mechanism (2), which is provided inside the reheating plate (1). The heating mechanism (2) includes a hopper (201), a drive shaft (205), a driven shaft (206), a crushing roller (207), a gear (208), a motor (210), a steam conveying pipe (211), a steam inlet pipe (212), and a steam outlet pipe (213). The top end of the reheating plate (1) is welded with a hopper (201). The drive shaft (205) and the driven shaft (206) are symmetrically installed inside the hopper (201) through bearings. The outer periphery of the drive shaft (205) and the driven shaft (206) are welded with... The crushing roller (207) is located inside the hopper (201). The outer periphery of the drive shaft (205) and the driven shaft (206) located outside the hopper (201) are both connected to gears (208) by keys, and the gears (208) mesh with each other. The power output end of the motor (210) is connected to the end of the drive shaft (205). A steam conveying pipe (211) is welded inside the reheating plate (1). A steam inlet pipe (212) extending to the outside of the reheating plate (1) is welded to the bottom end of the steam conveying pipe (211), and a steam exhaust pipe (213) is welded to the end of the steam conveying pipe (211) away from the steam inlet pipe (212).

2. The boiler waste heat driven steam reheating device according to claim 1, characterized in that: It also includes an auxiliary mechanism (3). The bottom of the reheat plate (1) is provided with an auxiliary mechanism (3). The auxiliary mechanism (3) includes a flue gas heating pipe (301) and a flue gas inlet pipe (302). The bottom of the reheat plate (1) is welded with a flue gas heating pipe (301) and the top of the flue gas heating pipe (301) is attached to the bottom of the steam conveying pipe (211). The bottom end of the flue gas heating pipe (301) is welded with a flue gas inlet pipe (302) that is connected to the boiler flue gas discharge pipe.

3. The boiler waste heat driven steam reheating device according to claim 1, characterized in that: The top inner wall of the hopper (201) is obliquely welded with guide plates (202) on both sides, and the bottom end of the guide plates (202) extends to the crushing rollers (207). The outer wall of the hopper (201) is welded with mounting brackets (203) on both sides, and mounting holes (204) are opened inside the mounting brackets (203).

4. The boiler waste heat driven steam reheating device according to claim 1, characterized in that: The steam conveying pipe (211) has a condensate drain pipe (214) welded to the end away from the hopper (201) that extends to the outside of the boiler. A valve (215) is installed inside the condensate drain pipe (214).

5. The boiler waste heat driven steam reheating device according to claim 1, characterized in that: The drive shaft (205) is connected to a sprocket A (209) via a key at one end away from the gear (208). A spring (216) is installed at the end of the outer wall of the reheat plate (1), and a horizontal plate (217) is movably connected to it via the spring (216). A through-spring (216) and a rod (218) inserted into the top of the reheat plate (1) are welded to the surface of the horizontal plate (217). A guide ring (219) is welded to the side of the reheat plate (1), and a guide ring (219) is welded to the end of the horizontal plate (217). A limiting rod (220) runs through the inside of the guide ring (219). A drive shaft (221) is movably connected to the end of the reheat plate (1) away from the limiting rod (220) via a bearing. A sprocket B (222) and a cam (224) are installed on the outer periphery of the drive shaft (221). A chain belt (223) is connected between the sprocket A (209) and the sprocket B (222). A protrusion plate (225) corresponding to the position of the cam (224) is welded to the end of the horizontal plate (217).

6. The boiler waste heat driven steam reheating device according to claim 2, characterized in that: The flue gas heating pipe (301) is welded to a flue gas exhaust pipe (303) at the end away from the flue gas inlet pipe (302).

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