Slag steam generator

Abstract

The utility model provides a slag steam generator, and relates to the field of slag dust treatment equipment. The heat exchanger comprises a shell and two heat exchange assemblies, each heat exchange assembly comprises a soft water input pipe, a steam discharge pipe and a plurality of heat exchange pipes, and the two soft water input pipes of the two heat exchange assemblies are located on the two sides of the lower portion of the shell respectively. The two steam discharge pipes of the two groups of heat exchange assemblies are respectively positioned on the two sides of the upper part of the shell; each heat exchange pipe is coiled in an S shape, one end of each heat exchange pipe is communicated with the soft water input pipe, and the other end of each heat exchange pipe is communicated with the steam discharge pipe; the multiple heat exchange pipes in the same heat exchange assembly are arranged at intervals in the radial direction of the shell, and the multiple heat exchange pipes of the two heat exchange assemblies are arranged in a staggered mode in the axial direction of the shell. The slag waste heat absorption device has the effect of improving the slag waste heat absorption efficiency.

Description

Technical Field

[0001] This application relates to the field of slag and dust treatment equipment, especially a slag steam generator. Background Art

[0002] In the production processes of large-scale pyrite and zinc concentrate for sulfuric acid production, the temperature of the mixed slag and dust generated by the fluidized bed furnace and the waste heat boiler can reach 780 - 800 °C, and the temperature of the dust discharged from the cyclone dust collector can reach 320 - 350 °C. Secondary resources can be produced by treating the mixed slag and dust, and great economic value can be created by reusing the secondary resources.

[0003] Currently, for the treatment methods of mixed slag and dust, they mainly include external water spraying cooling and internal circulation cooling in a slag cooler. When using external water spraying cooling, a large amount of water resources are consumed. Moreover, a large amount of steam will float around on-site, and the cooling water will also spread everywhere, wasting heat energy and water resources while polluting the on-site operation environment and posing a relatively large safety hazard. If only a slag cooler is used for cooling, when the amount of mixed slag and dust is too large, the amount of hot water generated by cooling the mixed slag and dust will exceed the demand of the boiler, resulting in an excess of hot water. Moreover, it will cause a large working burden on the slag cooler and require the slag cooler to have a large size to increase the slag cooling time, resulting in a significant increase in the costs of equipment procurement and maintenance, which is not conducive to industrialized popularization and use. Utility Model Content

[0004] In order to improve the problems of poor existing slag treatment effect and low waste heat utilization rate, this application provides a slag steam generator.

[0005] This application provides a slag steam generator, adopting the following technical solution:

[0006] The slag steam generator includes a shell and two groups of heat exchange components. Each group of the heat exchange components includes a soft water input pipe, a steam discharge pipe, and a number of heat exchange pipes. The two soft water input pipes of the two groups of heat exchange components are respectively located on both sides of the lower part of the shell, and the two steam discharge pipes of the two groups of heat exchange components are respectively located on both sides of the upper part of the shell; each heat exchange pipe is coiled in an S shape, one end of the heat exchange pipe is communicated with the soft water input pipe, and the other end of the heat exchange pipe is communicated with the steam discharge pipe; a number of heat exchange pipes within the same group of heat exchange components are arranged at intervals along the radial direction of the shell, and a number of heat exchange pipes of the two groups of heat exchange components are arranged in a staggered manner along the axial direction of the shell.

[0007] By adopting the above technical solution, several coiled heat exchange tubes are arranged in a staggered manner inside the shell, so that the relatively high-temperature slag can be evenly dispersed after entering the shell and flow in an S shape inside the shell. In this way, each heat exchange tube can come into contact with a sufficient amount of slag, and the contact time is increased. When the relatively low-temperature soft water enters the heat exchange tube, it can absorb the heat in the slag dust, thereby rapidly increasing its own temperature, generating steam inside the heat exchange tube. The steam is discharged from the upper part of each group of heat exchange tubes and is used for other production processes, effectively improving the absorption efficiency of the slag dust and playing a role in saving energy.

[0008] Optionally, the shell is arranged vertically. The top of the shell is provided with a feed inlet, the bottom of the shell is provided with a slag discharge outlet, the radial cross-section of the shell is square, each heat exchange tube is in a plate shape after being coiled, and several heat exchange tubes in the two heat exchange assemblies are parallel to each other.

[0009] By adopting the above technical solution, the slag is input into the shell from the upper feed inlet. Under the action of several heat exchange tubes, the slag can be evenly dispersed and flow in an S shape from top to bottom inside the shell, effectively increasing the contact area between the slag and the heat exchange tubes, thereby improving the heat exchange efficiency and further greatly enhancing the utilization rate of the waste heat of the slag.

[0010] Optionally, a rotary air lock valve is provided at the feed inlet or the slag discharge outlet. The rotary air lock valve is used to control the input speed or the discharge speed of the slag. A bin wall vibrator is provided at the lower part of the outer wall of the shell. The bin wall vibrator is used to vibrate the slag inside the shell.

[0011] By adopting the above technical solution, the rotary air lock valve is controlled to rotate at different speeds to adjust the flow rate of the slag entering the shell, thereby ensuring that the slag can smoothly enter the shell and be split among several heat exchange tubes. At the same time, the discharge speed of the slag from the shell can also be controlled, thereby ensuring that the slag is evenly discharged and preventing blockage of the slag.

[0012] Optionally, two inspection holes are provided on the outer wall of the shell. The two inspection holes are arranged at intervals along the height direction of the shell. A temperature measuring probe is provided in each of the two inspection holes. The temperature measuring probe collects the temperature data of the slag inside the shell and transmits it to the controller. The controller is used to control the rotation speed of the rotary air lock valve.

[0013] By adopting the above technical solution, the two temperature probes can detect the temperature of the slag in the shell, and when the temperature difference measured by the two temperature probes is large, it indicates that the cooling effect on the slag is good, and the star-shaped ash discharge valve can appropriately speed up the discharge speed of the slag and improve the overall processing efficiency. When the temperature difference measured by the two temperature probes is small, it indicates that the cooling effect on the slag is poor, and the rotation speed of the star-shaped ash discharge valve can be reduced, thereby increasing the retention time of the slag in the shell, thereby ensuring that the discharge temperature of the slag meets the design requirements.

[0014] Optionally, a distribution grid and support bars are provided on the top of the inner side of the shell, the support bars are connected end to end and connected to the inner wall of the shell, and the distribution grid is in a herringbone shape and is erected on the top of the support bars; a pair of coarse slag guide pipes are symmetrically provided on the outside of the shell, the feed end of the coarse slag guide pipes is connected to the inner side of the shell and is located at the lower end of the distribution grid, and the discharge end of the coarse slag guide pipes is connected to the slag discharge branch pipe.

[0015] By adopting the above technical scheme, after the slag enters the shell from the feed port, it will fall onto the dividing grid, and the fine slag in the slag will pass through the dividing grid and enter between several heat exchange tubes, while the coarse slag in the slag will roll down on the top of the dividing grid and roll into the coarse slag guide pipe, and be discharged from the shell through the slag discharge branch pipe. In other words, under the dividing action of the dividing grid, the fine slag can be treated with heat exchange, while the coarse slag is discharged from the shell and treated with heat exchange by other equipment, which effectively prevents the coarse slag from being stuck between several heat exchange tubes, ensuring that the heat exchange tubes can reliably utilize the waste heat of the slag.

[0016] Optionally, a slag discharge main pipe is provided at the slag outlet, and the slag discharge main pipe is used to transport slag to downstream equipment, the feed end of the slag discharge branch pipe is connected with the discharge end of the coarse slag guide pipe, and the discharge end of the slag discharge branch pipe is connected with the slag discharge main pipe; a protective plate is provided on the top of the distribution grid, and the protective plate is welded to the edge of the top of the distribution grid, both ends of the protective plate are in contact with the inner wall of the shell, and the protective plate is located below the feed port and is used to receive the slag.

[0017] By adopting the above technical scheme, after the slag enters the shell, it will first hit the protective plate and then fall onto the dividing grid, which plays a protective role on the dividing grid and increases the service life of the dividing grid; the fine slag in the slag is discharged from the slag outlet into the slag discharge main pipe after the heat exchange effect of the heat exchange tube, while the coarse slag in the slag is directly discharged into the slag discharge main pipe through the coarse slag guide pipe and the slag discharge branch pipe. In this way, the treated fine slag and untreated coarse slag will be mixed in the slag discharge main pipe and input into the slag cooler through the slag discharge main pipe, thereby performing secondary treatment on the slag and effectively improving the utilization rate of the waste heat of the slag.

[0018] Optionally, a pair of deflector plates are provided at the top of the material distribution grille. The deflector plates are V-shaped and perpendicular to the material distribution grille. One end of each deflector plate is provided with an opening, and the other end is provided with an orifice. The openings of the two deflector plates are docked with each other, and the two openings are respectively located on both sides of the protection plate. The orifice of one deflector plate is aligned with the feed end of one coarse slag diversion pipe, and the orifice of the other deflector plate is aligned with the feed end of the other coarse slag diversion pipe.

[0019] By adopting the above technical solution, under the guiding action of the deflector plates, it is ensured that all the coarse slag in the slag can enter the coarse slag diversion pipe, preventing the coarse slag from accumulating on the material distribution grille and ensuring that the external slag can continuously enter the shell.

[0020] Optionally, waist holes are provided on the outer wall of the main slag discharge pipe, and a corrugated plate is provided on the inner wall of the main slag discharge pipe. A movable rod is provided on one side of the corrugated plate to cover the waist hole, and the other side of the corrugated plate faces the discharge end of the slag discharge branch pipe. One end of the movable rod is connected to the corrugated plate, and the other end passes through the waist hole and extends to the outside of the main slag discharge pipe. A hydraulic cylinder is provided on the outer wall of the main slag discharge pipe, and the push rod of the hydraulic cylinder is connected to the movable rod. The hydraulic cylinder drives the movable rod to slide reciprocally in the waist hole.

[0021] By adopting the above technical solution, when the coarse slag is discharged into the main slag discharge pipe and mixed with the fine slag to cause blockage, the hydraulic cylinder drives the movable rod to act, and the movable rod drives the corrugated plate to move reciprocally along the axial direction of the main slag discharge pipe, thus forming a rubbing action on the slag, achieving the blockage clearing effect and ensuring that the slag can be reliably conveyed to the slag cooler through the main slag discharge pipe.

[0022] Optionally, the heat exchange tubes include a plurality of straight portions and a plurality of bent portions. The plurality of straight portions and the plurality of bent portions are arranged at intervals and communicated in sequence. There is a distance between adjacent two straight portions. A plurality of baffle plates are provided on the inner wall of the shell. The baffle plates are inverted V-shaped and are arranged above the straight portions to cover the straight portions. There are distances between adjacent two baffle plates in both the axial and radial directions of the shell. A plurality of heat conducting strips are also provided on the inner wall of the shell. The bottom of each straight portion is connected to a heat conducting strip, and the heat conducting strip extends along the length direction of the straight portion.

[0023] By adopting the above technical solution, under the protection of the baffle, the impact force of the slag on the straight part can be removed, thereby improving the service life of the straight part of the upper heat exchange tube and ensuring that the soft water at a lower temperature can flow reliably in the straight part and the bent part; the heat conduction strip can increase the heat exchange area of the heat exchange tube, maximizing the heat exchange effect. At the same time, the heat conduction strip can also play a supporting role for the straight part, improving the overall strength of the straight part and ensuring that the heat exchange tube can be reliably arranged inside the shell and continuously absorb the heat in the slag dust.

[0024] Optionally, a plurality of rotating shafts are provided on the inner wall of the shell, perforations are provided at the corners of the baffle, and the baffle is sleeved outside the rotating shaft through the perforations; the radial cross-section of the rotating shaft is semi-circular, the outer wall of the top of the rotating shaft fits with the inner wall of the top of the perforation, a rotating plate is provided at the bottom of the rotating shaft, the rotating plate is perpendicular to the rotating shaft, and a pair of limiting plates are provided on the inner wall of the perforation, the limiting plates are located on both sides of the rotating plate, and both the limiting plate and the rotating plate extend along the axial direction of the rotating shaft.

[0025] By adopting the above technical solution, the rotating shaft is fixedly arranged, and the baffle is sleeved on the rotating shaft. When the slag impacts the baffle, the baffle can rotate around the rotating shaft, thereby playing a buffering role for the slag impact and improving the service life of the baffle to a certain extent; the setting of a pair of limiting plates plays a role in restricting the rotation amplitude of the baffle, ensuring that the baffle can maintain an inverted V shape, so as to reliably guide the slag to both sides of the straight part and improve the protection effect on the straight part.

[0026] In summary, the present application has the following beneficial effects:

[0027] 1. A plurality of heat exchange tubes are arranged in a staggered manner inside the shell. While saving the installation space, it enables the slag to flow in an S shape between the heat exchange tubes, thereby prolonging the residence time of the slag inside the shell. Furthermore, the soft water at a lower temperature inside the heat exchange tube can absorb more heat, ensuring that steam can be produced after the soft water is heated, and the generated steam can be used in other production processes, improving the recovery efficiency and utilization rate of the waste heat of the high-temperature slag dust.

[0028] 2. A material distribution grille is arranged at the inner top of the shell. Under the guiding action of the diversion plate, the coarse slag in the slag can be diverted into the coarse slag diversion pipe and discharged from the shell, while the fine slag in the slag can pass through the material distribution grille and flow between a plurality of heat exchange tubes, ensuring that the slag will not be blocked between the plurality of heat exchange tubes, and thus ensuring that the recovery treatment of the slag waste heat can continue, reducing the maintenance difficulty.

[0029] 3. The fine slag after heat exchange through the heat exchange tubes and the untreated coarse slag are mixed in the main slag discharge pipe and input into the downstream slag cooler through the main slag discharge pipe. On the one hand, the secondary recovery of waste heat can be carried out through the slag cooler to improve the utilization rate of waste heat. On the other hand, the temperature of the slag entering the slag cooler can be reduced, so that the relatively small-sized slag cooler can perform secondary treatment on the slag, reducing the maintenance and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the structural schematic diagram of the present application Figure 1 ;

[0031] Figure 2 is the structural schematic diagram of the present application Figure 2 ;

[0032] Figure 3 is the internal structural schematic diagram of the present application Figure 1 ;

[0033] Figure 4 is the structural schematic diagram of the present application Figure 3 ;

[0034] Figure 5 is the internal structural schematic diagram of the present application Figure 2 ;

[0035] Figure 6 is the reference diagram of the assembly state of the baffle;

[0036] Figure 7 is the internal structural schematic diagram of the baffle;

[0037] Figure 8 is the structural schematic diagram of the present application Figure 4 ;

[0038] Figure 9 is the reference diagram of the assembly state of the main slag discharge pipe and the branch slag discharge pipe;

[0039] Figure 10 is the reference diagram of the use state of the present application;

[0040] In the figure: 1. Housing; 11. Feed inlet; 110. Star-shaped ash discharge valve; 12. Slag outlet; 13. Bin wall vibrator; 14. Inspection hole; 140. Temperature measuring probe; 15. Support strip; 16. Coarse slag diversion pipe; 17. Baffle; 171. Perforation; 172. Limiting plate; 18. Heat conducting strip; 19. Rotating shaft; 190. Rotating plate; 2. Heat exchange assembly; 21. Soft water input pipe; 22. Steam discharge pipe; 23. Heat exchange tube; 231. Straight part; 232. Bending part; 3. Distributing grille; 31. Protective plate; 32. Deflector; 4. Branch slag discharge pipe; 5. Main slag discharge pipe; 51. Kidney-shaped hole; 52. Corrugated plate; 53. Movable rod; 54. Hydraulic cylinder; 6. Slag cooler. Detailed implementation manners

[0041] The following further elaborates on this application in conjunction with Figures 1 - 10 the accompanying drawings.

[0042] Figure 1 is the structural schematic diagram of this application Figure 1 , Figure 2 is the structural schematic diagram of this application Figure 2 . Refer to Figure 1 and Figure 2 . The slag steam generator includes a housing 1 and two groups of heat exchange components 2. A feed inlet 11 is provided at the top of the housing 1. The number of feed inlets 11 can be two, and the two feed inlets 11 are respectively arranged on both sides of the top of the housing 1. The fluidized bed boiler and the waste heat boiler input slag dust with a temperature of 780 - 800 °C into the housing 1 through one feed inlet 11, and the cyclone dust collector inputs slag dust with a temperature of 320 - 350 °C into the housing 1 through the other feed inlet 11. Since there are differences in the outer diameters of the slag dust discharged from the fluidized bed boiler and the waste heat boiler and the particle sizes of the slag dust discharged from the cyclone dust collector, the slag input into the housing 1 can be divided into coarse slag and fine slag. At the same time, caking occurs in the flue due to excessive temperature at the top layer of the fluidized bed boiler and will collapse and fall into the housing 1, and the castable refractory concrete in the boiler also falls into the housing 1, and both of these are coarse slag.

[0043] Figure 3 is the internal structural schematic diagram of this application Figure 1 . Refer to Figure 3 and in conjunction with Figure 2, each heat exchange component 2 includes a soft water input pipe 21, a steam discharge pipe 22 and a number of heat exchange pipes 23. The soft water input pipe 21 is located outside the lower part of the housing 1, and the steam discharge pipe 22 is located on the upper outer side of the housing 1. One end of each heat exchange pipe 23 is connected to the soft water input pipe 21, and the other end is connected to the steam discharge pipe 22. In this way, the relatively cold soft water outside can be input into the heat exchange pipes 23 through the soft water input pipe 21 and flow inside the heat exchange pipes 23, and after absorbing the temperature of the slag, it becomes steam and finally discharges from the steam discharge pipe 22. The two soft water input pipes 21 of the two heat exchange components 2 are respectively located on both sides of the lower part of the housing 1, and the two steam discharge pipes 22 of the two heat exchange components 2 are respectively located on both sides of the upper part of the housing 1. Moreover, each heat exchange pipe 23 is coiled in an S shape, and after the heat exchange pipes 23 are coiled, they will be in a flat plate shape. In this way, a number of heat exchange pipes 23 within the same heat exchange component 2 are arranged at intervals along the radial direction of the housing 1, while a number of heat exchange pipes 23 of the two heat exchange components 2 are arranged in a staggered manner along the axial direction of the housing 1. Since the radial cross-section of the housing 1 is square and the heat exchange pipes 23 are in a plate shape, a number of heat exchange pipes 23 can make more full use of the internal space of the housing 1. Specifically, one heat exchange pipe 23 of one heat exchange component 2 is arranged close to one side of the inner wall of the housing 1, then one heat exchange pipe 23 of another heat exchange component 2 is arranged close to the previous heat exchange pipe 23, and then the next heat exchange pipe 23 of one heat exchange component 2 is installed, and so on until the last heat exchange pipe 23 is close to the other side of the inner wall of the housing 1. Further, adjacent two heat exchange pipes 23 are arranged in a vertical staggered manner along the axial direction of the housing 1, that is to say, the heat exchange pipes 23 within the same heat exchange component 2 are arranged at intervals along the same height, while the heat exchange pipes 23 of the two heat exchange components 2 are arranged in parallel and have a height difference. In this way, the internal space of the housing 1 is utilized to the greatest extent.

[0044] Figure 4 is the structural schematic of the present application Figure 3 , Figure 5 is the internal structural schematic of the present application Figure 2 . See Figure 4 and Figure 5 , a material distribution grid 3 is provided in the housing 1. The material distribution grid 3 can screen out the coarse slag in the slag. The fine slag in the slag will flow in an S shape between a number of heat exchange pipes 23 after passing through the material distribution grid 3, realizing the dispersion effect on the slag. At the same time, the material distribution grid 3 can also reduce the flow speed of the slag, so that the outside of each heat exchange pipe 23 has slag flowing through, thereby greatly improving the heat exchange effect, enabling the heat of the slag to be quickly radiated to the heat exchange pipes 23 and absorbed by the soft water in the heat exchange pipes 23, and the soft water will quickly turn into steam after absorbing a large amount of heat. The steam can be discharged outward through the steam discharge pipe 22 and transported to other production processes, realizing the recovery and reuse of the waste heat of the slag, achieving energy conservation and emission reduction, and being able to create huge economic value.

[0045] Figure 6 It is a reference diagram of the assembly state of the baffle plate, Figure 7 and it is a schematic diagram of the internal structure of the baffle plate. Refer to Figure 6 and Figure 7, the heat exchange tube 23 includes a plurality of straight portions 231 and a plurality of bent portions 232. The plurality of straight portions 231 and the plurality of bent portions 232 are arranged at intervals and are connected in sequence. There is a distance between adjacent straight portions 231. In this way, the residence time of the soft water in the housing 1 is increased, and thus the heat exchange time and the heat exchange effect are improved. At the same time, there is a distance between adjacent straight portions 231, ensuring that the slag can flow between the two straight portions 231, further improving the dispersion effect on the slag, and then improving the absorption effect on the waste heat of the slag. A plurality of rotating shafts 19 and baffles 17 are provided in the housing 1. Both ends of the rotating shaft 19 are connected to the inner wall of the housing 1, and a rotating shaft 19 is provided above each straight portion 231. The baffle 17 is in an inverted V shape, and a through hole 171 is provided at the edge of the baffle 17. The through hole 171 penetrates along the length direction of the baffle 17. The baffle 17 is sleeved outside the rotating shaft 19 through the through hole 171. The radial cross section of the rotating shaft 19 is semicircular, the top of the rotating shaft 19 is fitted to the inner wall of the through hole 171, and a rotating plate 190 is provided at the bottom of the rotating shaft 19. A pair of limiting plates 172 are provided on the inner wall of the through hole 171. The pair of limiting plates 172 are located on both sides of the rotating plate 190, and both the rotating plate 190 and the limiting plates 172 extend along the length direction of the rotating shaft 19. When the slag flows between the plurality of heat exchange tubes 23, if the slag directly contacts the straight portion 231, it will cause a large impact on the straight portion 231. At this time, under the action of the baffle 17, the slag will first contact the baffle 17, and the baffle 17 is in an inverted V shape, and a rebounding effect on the slag can be formed after the slag contacts, so as to achieve a buffering effect, reduce the impact force of the slag on the straight portion 231, and play a role in protecting the heat exchange tube 23. Further, since the baffle 17 is sleeved on the rotating shaft 19, when the slag contacts one side of the baffle 17, the baffle 17 will rotate around the rotating shaft 19, thereby improving the buffering effect of the baffle 17 on the slag. Under the limiting action of the pair of limiting plates 172, the rotation amplitude of the baffle 17 can be limited, ensuring that the baffle 17 can maintain an inverted V shape or a state close to an inverted V shape, and will not undergo a flip greater than 90°, thereby ensuring the continuous and reliable protection effect of the baffle 17 on the heat exchange tube 23. At the same time, there are distances between adjacent two baffles 17 in both the axial and radial directions of the housing 1, so that interference will not occur between adjacent two baffles 17, ensuring the reliable shielding effect of the baffle 17 on the straight portion 231. Further, a heat conducting strip 18 is provided at the bottom of each straight portion 231. Both ends of the heat conducting strip 18 are in contact with the inner wall of the housing 1. The heat conducting strip 18 extends along the length direction of the straight portion 231. In this way, the heat conducting strip 18 is connected to the heat exchange tube 23, which can increase the heat exchange area of the heat exchange tube 23, thereby improving the absorption effect on the waste heat of the slag. At the same time, the heat conducting strip 18 can also play a role in supporting the straight portion 231, improving the strength of the straight portion 231, and then improving the service life of the heat exchange tube 23.

[0046] See Figure 4And Figure 5 , a support bar 15 is provided at the inner top of the housing 1. The support bar 15 is welded to the inner wall of the housing 1 and is connected end to end. The material distribution grille 3 is in a herringbone shape. In this way, after the material distribution grille 3 is placed on the support bar 15, the material distribution grille 3 forms a partition for the housing 1. When the slag enters the housing 1 from the feed inlet 11, it will first fall onto the material distribution grille 3. In this way, the fine slag in the slag will pass through the material distribution grille 3 and flow towards the bottom of the housing 1, while the coarse slag in the slag will be isolated at the top of the material distribution grille 3. A protective plate 31 is provided at the top of the material distribution grille 3. The protective plate 31 is welded to the edge of the top of the material distribution grille 3. Both ends of the protective plate 31 are in contact with the inner wall of the housing 1. The protective plate 31 is located below the feed inlet 11 and is used to receive the slag. When the slag enters the housing 1, it will first contact the protective plate 31 and then roll on the top of the material distribution grille 3. In this way, the protective plate 31 can effectively reduce the wear of the material distribution grille 3 caused by the impact of the slag, effectively improving the service life of the material distribution grille 3. Further, the material distribution grille 3 is erected on the support bar 15 without fixation, which is convenient for replacing the material distribution grille 3.

[0047] Figure 8 is the structural schematic of the present application Figure 4 . Refer to Figure 8 and combine with Figure 5 , a pair of diversion plates 32 are provided at the top of the material distribution grille 3. The diversion plates 32 are in a V shape. The diversion plates 32 are perpendicular to the material distribution grille 3. One end of the diversion plate 32 is provided with an open end, and the other end of the diversion plate 32 is provided with an opening. The open ends of the two diversion plates 32 are docked with each other, and the two open ends are respectively located on both sides of the protective plate 31. A pair of coarse slag diversion pipes 16 are provided on the outer wall of the housing 1. A slag discharge branch pipe 4 is also provided outside the housing 1. The feed end of the coarse slag diversion pipe 16 is docked with the opening of the diversion plate 32, and the discharge end of the coarse slag diversion pipe 16 is communicated with the slag discharge branch pipe 4. In this way, the intercepted coarse slag will roll down on the top of the material distribution grille 3 and will all enter the coarse slag diversion pipe 16 under the guiding action of the diversion plate 32, and then flow to the slag discharge branch pipe 4 through the coarse slag diversion pipe 16. At the same time, the diversion plate 32 can be made of the same grille plate as the material distribution grille 3 to ensure that it can play a guiding role for the coarse slag and will not affect the normal flow of the fine slag. Through the setting of the material distribution grille 3, a small amount of coarse slag in the slag is effectively screened out, ensuring that the fine slag in the slag can flow smoothly in the housing 1 and pass through the heat exchange assembly 2 for heat exchange, realizing the recovery of the waste heat in the slag.

[0048] Figure 9 is the assembly state reference diagram of the main slag discharge pipe and the slag discharge branch pipe, Figure 10 is the use state reference diagram of the present application. Refer to Figure 9 and Figure 10 and combine with Figure 8, a slag discharge main pipe 5 is provided at the slag discharge port 12 of the housing 1, a heat preservation layer is provided on the outer wall of the housing 1, and the coarse slag diversion pipe 16 extends in the heat preservation layer to reduce the heat loss of the coarse slag. The feed end of the slag discharge branch pipe 4 is communicated with the discharge end of the coarse slag diversion pipe 16. In this way, the coarse slag in the coarse slag diversion pipe 16 will flow into the slag discharge main pipe 5 through the slag discharge branch pipe 4, so that the fine slag after heat exchange through the heat exchange pipe 23 can be mixed with the untreated coarse slag and be transported to downstream equipment, such as the slag cooler 6, through the slag discharge main pipe 5. In this way, the slag can be secondarily treated by the slag cooler 6, so as to recover the waste heat of the slag to the greatest extent. At the same time, the temperature of the slag input into the slag cooler 6 has been reduced, the performance requirements and size requirements for the slag cooler 6 are also reduced, which can reduce the procurement and maintenance costs of equipment for enterprises and improve the overall economic benefits.

[0049] A waist hole 51 is provided on the outer wall of the slag discharge main pipe 5, a rubbing plate 52 is provided on the inner wall of the slag discharge main pipe 5, the rubbing plate 52 fits with the inner wall of the slag discharge main pipe 5, a movable rod 53 is provided on one side of the rubbing plate 52, the other side of the rubbing plate 52 faces the discharge end of the slag discharge branch pipe 4, one end of the movable rod 53 is connected with the rubbing plate 52, the other end of the movable rod 53 passes through the waist hole 51 and extends to the outside of the slag discharge main pipe 5, a hydraulic cylinder 54 is provided on the outer wall of the slag discharge main pipe 5, the push rod of the hydraulic cylinder 54 is connected with the movable rod 53, and the hydraulic cylinder 54 pushes the movable rod 53 to slide reciprocally in the waist hole 51. When the coarse slag and the fine slag flow normally in the slag discharge main pipe 5, both the hydraulic cylinder 54 and the rubbing plate 52 remain stationary. When the coarse slag and the fine slag are blocked in the slag discharge main pipe 5, the hydraulic cylinder 54 pushes the movable rod 53 to move in the waist hole 51, thereby driving the rubbing plate 52 to rub reciprocally in the slag discharge main pipe 5. In this way, the slag can be rubbed, the bridging effect of the coarse slag and the fine slag at the slag discharge main pipe 5 can be destroyed, and the clogging removal effect can be achieved. Further, a plurality of protrusions are provided on the side of the rubbing plate 52 in contact with the slag or the surface is roughened, so as to increase the friction between the rubbing plate 52 and the slag and ensure the reliable clogging removal effect of the rubbing plate 52. At the same time, the rubbing plate 52 has sufficient length to ensure that the rubbing plate 52 can always cover the waist hole 51 during the reciprocating movement, prevent the slag from leaking out from the waist hole 51, and moreover, the rubbing plate 52 is located below the discharge end of the slag discharge branch pipe 4. In this way, the rubbing plate 52 can also play a buffering role for the slag, reduce the wear of the slag on the slag discharge main pipe 5, and improve the overall strength of the slag discharge branch pipe 5.

[0050] See Figure 8 and Figure 10, a rotary air lock valve 110 is provided at the feed inlet 11 or the slag discharge port 12. Specifically, when the housing 1 is used to receive the slag from the fluidized bed furnace and the waste heat boiler, the rotary air lock valve 110 is provided at the slag discharge port 12. At this time, the rotary air lock valve 110 can control the slag discharge speed and extend the residence time of the slag in the housing 1, thereby improving the treatment effect of the slag with a relatively high temperature input from the fluidized bed furnace and the waste heat boiler. When the housing 1 is used to receive the slag from the cyclone dust collector, the rotary air lock valve 110 is provided at the feed inlet 11. Since the initial temperature of this slag is relatively low, its temperature will decrease significantly after the heat exchange effect of the heat exchange tube 23. At this time, the slag discharge port 12 needs to be kept open to prevent the slag with a lower temperature from forming cold adhesion and bridging at the front end of the heat exchange tube 23, thereby effectively preventing the blockage of the slag discharge port 12. Further, a bin wall vibrator 13 can be provided at the lower part of the outer wall of the housing 1 to vibrate the bottom of the housing 1 through the bin wall vibrator 13, thereby improving the anti-blocking effect and ensuring smooth slag discharge.

[0051] See Figure 8 , two inspection holes 14 are provided on the outer wall of the housing 1. The two inspection holes 14 are arranged at intervals along the height direction of the housing 1. A temperature measuring probe 140 is provided in each of the two inspection holes 14. The temperature measuring probe 140 collects the temperature data of the slag in the housing 1 and transmits it to the controller. The controller is used to control the rotation speed of the rotary air lock valve 110. After the heat exchange effect of the heat exchange tube 23, the temperature of the slag will decrease. In this way, there will be a difference in the temperature data measured by the two temperature measuring probes 140. When the temperature difference is relatively large, it indicates that the absorption effect of the waste heat of the slag is relatively good. At this time, the rotation speed of the rotary air lock valve 110 can be increased, thereby increasing the input amount of the slag and improving the treatment efficiency of the slag. When the temperature difference is relatively small, it indicates that the absorption effect of the waste heat of the slag is relatively poor. At this time, the rotation speed of the rotary air lock valve 110 can be reduced, thereby extending the residence time of the slag in the housing 1 to ensure that sufficient waste heat of the slag can be absorbed by the soft water.

[0052] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A slag steam generator, characterized in that: It comprises a shell (1) and two groups of heat exchange components (2), each group of the heat exchange components (2) comprises a soft water input pipe (21), a steam exhaust pipe (22) and a plurality of heat exchange pipes (23), the two soft water input pipes (21) of the two groups of heat exchange components (2) are respectively located on both sides of the lower part of the shell (1), and the two steam exhaust pipes (22) of the two groups of heat exchange components (2) are respectively located on both sides of the upper part of the shell (1); Each of the heat exchange tubes (23) is coiled in an S shape, one end of the heat exchange tube (23) is connected to the soft water input pipe (21), and the other end of the heat exchange tube (23) is connected to the steam exhaust pipe (22); The plurality of heat exchange tubes (23) in the same group of heat exchange components (2) are arranged at intervals along the radial direction of the shell (1), and the plurality of heat exchange tubes (23) in two groups of heat exchange components (2) are staggered along the axial direction of the shell (1).

2. The slag steam generator according to claim 1, characterized in that: The shell (1) is arranged vertically, a feed port (11) is provided at the top of the shell (1), a slag outlet (12) is provided at the bottom of the shell (1), the radial cross section of the shell (1) is square, each of the heat exchange tubes (23) is plate-shaped after being coiled, and the plurality of heat exchange tubes (23) in the two groups of heat exchange components (2) are parallel to each other.

3. The slag steam generator according to claim 2, characterized in that: A star-shaped ash discharge valve (110) is provided at the feed port (11) or the slag discharge port (12), and the star-shaped ash discharge valve (110) is used to control the input speed of slag or the discharge speed of slag. A silo wall vibrator (13) is provided at the lower part of the outer wall of the shell (1), and the silo wall vibrator (13) is used to vibrate the slag in the shell (1).

4. The slag steam generator according to claim 3, characterized in that: Two inspection holes (14) are provided on the outer wall of the shell (1), and the two inspection holes (14) are arranged at intervals along the height direction of the shell (1). A temperature measuring probe (140) is provided in each of the two inspection holes (14). The temperature measuring probe (140) collects temperature data of the slag in the shell (1) and transmits the data to a controller, and the controller is used to control the rotation speed of the star-shaped ash discharge valve (110).

5. The slag steam generator according to claim 2, characterized in that: A material distribution grid (3) and a support bar (15) are provided on the inner top of the shell (1); the support bar (15) is connected end to end and connected to the inner wall of the shell (1); the material distribution grid (3) is in a herringbone shape and is mounted on the top of the support bar (15); A pair of coarse slag guide pipes (16) are symmetrically provided on the outer side of the shell (1); the feed ends of the coarse slag guide pipes (16) are connected to the inner side of the shell (1) and are located at the lower end of the distribution grid (3); and the discharge ends of the coarse slag guide pipes (16) are connected to the slag discharge branch pipe (4).

6. The slag steam generator according to claim 5, characterized in that: A slag discharge main pipe (5) is provided at the slag discharge port (12), and the slag discharge main pipe (5) is used to transport slag to downstream equipment, the feed end of the slag discharge branch pipe (4) is connected to the discharge end of the coarse slag guide pipe (16), and the discharge end of the slag discharge branch pipe (4) is connected to the slag discharge main pipe (5); A protective plate (31) is provided on the top of the distribution grid (3), and the protective plate (31) is welded to the edge of the top of the distribution grid (3). Both ends of the protective plate (31) are in contact with the inner wall of the shell (1). The protective plate (31) is located below the feed port (11) and is used to receive slag.

7. The slag steam generator according to claim 6, characterized in that: A pair of guide plates (32) are provided on the top of the material distribution grid (3), the guide plates (32) are V-shaped, the guide plates (32) and the material distribution grid (3) are perpendicular to each other, one end of the guide plates (32) is provided with an opening, and the other end of the guide plates (32) is provided with an opening, the openings of the two guide plates (32) are butted against each other, and the two openings are respectively located on both sides of the protective plate (31); The opening of one guide plate (32) is aligned with the feed end of one coarse slag guide pipe (16), and the opening of another guide plate (32) is aligned with the feed end of another coarse slag guide pipe (16).

8. The slag steam generator according to claim 6, characterized in that: The outer wall of the slag discharge main pipe (5) is provided with a waist hole (51), the inner wall of the slag discharge main pipe (5) is provided with a washboard (52), one side of the washboard (52) is provided with a movable rod (53) and covers the waist hole (51), and the other side of the washboard (52) faces the discharge end of the slag discharge branch pipe (4); One end of the movable rod (53) is connected to the washboard (52), and the other end of the movable rod (53) passes through the waist hole (51) and extends to the outside of the slag discharge main pipe (5). A hydraulic cylinder (54) is provided on the outer wall of the slag discharge main pipe (5), and a push rod of the hydraulic cylinder (54) is connected to the movable rod (53). The hydraulic cylinder (54) pushes the movable rod (53) to slide back and forth in the waist hole (51).

9. The slag steam generator according to claim 2, characterized in that: The heat exchange tube (23) comprises a plurality of straight portions (231) and a plurality of curved portions (232), the plurality of straight portions (231) and the plurality of curved portions (232) are arranged at intervals and are connected in sequence, and there is a distance between two adjacent straight portions (231); A plurality of baffles (17) are provided on the inner wall of the shell (1), the baffles (17) are in an inverted V shape, the baffles (17) are provided above the straight portion (231) and cover the straight portion (231), and there is a distance between two adjacent baffles (17) in both the axial direction and the radial direction of the shell (1); A plurality of heat-conducting strips (18) are also provided on the inner wall of the shell (1), the bottom of each straight portion (231) is connected to a heat-conducting strip (18), and the heat-conducting strip (18) extends along the length direction of the straight portion (231).

10. The slag steam generator according to claim 9, characterized in that: A plurality of rotating shafts (19) are provided on the inner wall of the housing (1), and through holes (171) are provided at the corners of the baffle (17), and the baffle (17) is sleeved on the outer side of the rotating shaft (19) through the through holes (171); The radial cross-section of the rotating shaft (19) is semicircular, the top outer wall of the rotating shaft (19) is in contact with the top inner wall of the through hole (171), a rotating plate (190) is provided at the bottom of the rotating shaft (19), the rotating plate (190) is vertically arranged with the rotating shaft (19), a pair of limiting plates (172) are provided on the inner wall of the through hole (171), the limiting plates (172) are located on both sides of the rotating plate (190), and the limiting plates (172) and the rotating plate (190) both extend along the axial direction of the rotating shaft (19).

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