Hot water slag cooler

Abstract

The utility model provides a hot water slag cooler, and relates to the field of slag treatment equipment. The slag dust cooling device comprises a steel bracket, the steel bracket is provided with a sealed water tank, a first roller and a second roller, the first roller and the second roller are communicated with each other and are coaxially arranged, and slag dust to be cooled sequentially penetrates through the first roller and the second roller; the first roller is arranged in the sealed water tank, and a spraying pipe used for spraying cooling water is arranged on the inner side of the sealed water tank; a plurality of heat exchange units used for increasing the heat exchange area are arranged on the inner wall of the first roller, a second clamping sleeve is arranged on the outer side of the second roller, the second clamping sleeve and the heat exchange units are both communicated with the sealed water tank, and cooling water flowing towards the sealed water tank is arranged in the second clamping sleeve. The slag cooler has the characteristics that the water consumption of the slag cooler is reduced, and the slag dust cooling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of slag processing equipment, and in particular to a hot water slag cooling machine. Background Art

[0002] In the 100-200Kt / a pyrite acid production process, the mixed temperature of slag dust from the boiling furnace and boiler is about 750-800℃, and the slag dust needs to be cooled before it can be discharged or transported.

[0003] See also Figure 1 In the prior art, the slag dust with a higher temperature is transported into the drum, and the drum can rotate around itself under the drive of the driving mechanism and the transmission mechanism, and a water spray pipe is provided above the drum, and the drum is cooled by spraying cooling water on the drum through the water spray pipe. In this way, when the slag dust enters the drum and moves from the inlet of the drum to the outlet of the drum, the heat of the slag dust will be transferred to the drum and indirectly taken away by the cooling water, thereby achieving the cooling effect of the slag dust.

[0004] However, a large amount of water vapor is generated during the cooling process, and nearly 10,000 tons of industrial water is evaporated annually. The water consumption is too large, and the accumulated water and water vapor around the equipment affect the on-site environment, which is not conducive to the operation and maintenance of the equipment. It is also easy to cause the lubricating oil on the transmission parts to overflow, thereby causing equipment damage. Furthermore, the residual sulfur content in the slag dust is 0.5-1.5%, and a small amount of sulfur dioxide and sulfur trioxide gas will be brought out during the cooling process. These gases will produce dilute acid when in contact with water molecules, causing equipment corrosion. Utility Model Content

[0005] In order to improve the problem that the existing slag cooler consumes too much water and easily pollutes the operating environment, the present application provides a hot water slag cooler.

[0006] The present application provides a hot water slag cooling machine, which adopts the following technical solution:

[0007] The hot water slag cooling machine comprises a steel bracket, on which a sealed water tank and a first roller and a second roller which are interconnected and coaxially arranged are provided, and the slag dust to be cooled passes through the first roller and the second roller in sequence; the first roller is arranged in the sealed water tank, and a spray pipe for spraying cooling water is provided on the inner side of the sealed water tank; a plurality of heat exchange units for increasing the heat exchange area are provided on the inner wall of the first roller, and a second jacket is provided on the outer side of the second roller, and the second jacket and the heat exchange unit are both connected to the sealed water tank, and the second jacket is provided with cooling water flowing toward the sealed water tank.

[0008] By adopting the above technical solution, the cooling water sprayed from the spray pipe can cool down the upper part of the first roller and accumulate in the sealed water tank, so that the lower part of the first roller is immersed in the cooling water, thereby improving the cooling effect on the first roller. The cooling water in the second jacket flows toward the sealed water tank, achieving the cooling effect on the second roller. In this way, under the premise of reducing the amount of cooling water used, the cooling effect of the slag dust can be improved, and the cooling water can be prevented from spreading everywhere and causing pollution to the operating environment. Furthermore, the first roller can expand freely in the sealed water tank without causing other components to be squeezed and cracked, further improving the effect of preventing water leakage.

[0009] Optionally, a plurality of the heat exchange units are staggeredly arranged on the inner side of the first drum, each of the heat exchange units includes a pair of heat exchange tubes and a ventilation pipe, the ventilation pipe connects the pair of heat exchange tubes, and the end of the heat exchange tube not connected to the ventilation pipe extends to the outside of the first drum.

[0010] By adopting the above technical solution, during the rotation of the first drum, when a heat exchange tube of the heat exchange unit is transferred below the liquid level of the cooling water, the cooling water will gradually fill the two heat exchange tubes and one ventilation pipe. In this way, the heat exchange area is increased through the contact between the heat exchange tube and the ventilation pipe with the slag dust, thereby improving the cooling effect on the slag dust.

[0011] Optionally, the heat exchange tube is welded on the first roller, the inner cavity of the heat exchange tube is connected with the inner cavity of the sealed water tank, the inner cavity of the heat exchange tube is connected with the inner cavity of the ventilation pipe, and the inner cavity of the heat exchange tube is isolated from the inner cavity of the first roller.

[0012] By adopting the above technical solution, it is ensured that cooling water can enter the heat exchange unit through one heat exchange tube and then discharge the heat exchange unit from another heat exchange tube, ensuring that cooling water can flow in the heat exchange unit, thereby improving the heat conduction efficiency and further improving the cooling effect on the slag dust.

[0013] Optionally, a plurality of guide plate groups are welded on the inner wall of the first roller and the inner wall of the second roller, each of the guide plate groups includes a plurality of guide plates, and the plurality of guide plates are arranged in a spiral shape and at intervals.

[0014] By adopting the above technical solution, under the action of a plurality of guide plate groups, the slag dust can reliably move in the first roller and the second roller, thereby transferring heat to the first roller and the second roller, thereby achieving self-cooling.

[0015] Optionally, a cavity is provided in the material guide plate, and a plurality of water inlet holes are provided on the inner wall of the first roller and the inner wall of the second roller, each of the cavity is connected to at least two of the water inlet holes, and each of the water inlet holes is connected to the corresponding cavity.

[0016] By adopting the above technical solution, cooling water can enter the cavity through the water inlet hole, so that the guide plate can transfer heat more quickly while guiding the movement of the slag dust, thereby further improving the cooling effect on the slag dust.

[0017] Optionally, a feed pipe is provided at the front end of the first roller and a discharge pipe is provided at the rear end, both of which are located outside the sealed water tank, the feed pipe is connected to the slag dust discharge pipe, and the discharge pipe is connected to the front end of the second roller by a flange; a discharge box is provided at the rear end of the second roller, the discharge box is sleeved on the outside of the second roller and connected to the steel bracket, and a discharge pipe is provided at the bottom of the discharge box; the feed pipe and the discharge pipe have the same inner diameter and are both smaller than the inner diameter of the first roller, the discharge pipe has the same inner diameter as the second roller, and a first jacket is provided on the outside of the feed pipe and the discharge pipe, and a front water inlet pipe for conveying cooling water is provided on the top of the first jacket on the outside of the feed pipe, and the first jacket on the outside of the discharge pipe is connected to the second jacket via a plurality of connecting pipes.

[0018] By adopting the above technical solution, the slag dust enters the first roller through the feed pipe, then enters the second roller through the discharge pipe, and finally is discharged to the outside through the discharge pipe; the first roller with a larger outer diameter is set in the sealed water tank, which can improve the front-end cooling effect of the slag dust. At the same time, the cooling water for cooling the first roller and the second roller is collected in the sealed water tank, which can facilitate the recycling of the cooling water. The flange connection is convenient for transportation and on-site assembly and installation, which reduces the cost of equipment transportation and installation.

[0019] Optionally, the top of the sealed water tank is provided with an exhaust pipe for discharging water vapor, and the bottom is provided with a drain pipe for discharging hot water, and the connection between the drain pipe and the sealed water tank is located below the feed pipe; the slag and dust discharge pipe extends to the inner side of the feed pipe and a labyrinth seal is provided between the end face of the feed pipe.

[0020] By adopting the above technical solution, the feed pipe is open, and the connection point of the sealed water tank of the drain pipe is lower than the feed pipe, which can ensure that the cooling water in the sealed water tank will not be discharged through the feed pipe. The steam generated in the first roller can be discharged through the exhaust pipe, which prevents the pressure in the sealed water tank from being too high and causing the cooling water in the first jacket or the second jacket to be unable to enter the sealed water tank. The cooling water will heat up to hot water after cooling the first roller and the second roller, and the hot water will be discharged through the drain pipe, so that the hot water can be reused.

[0021] Optionally, a main water pipe is inserted into the second roller, the front end of the main water pipe is located on the inner side of the rear end of the second roller, a central water diversion head is provided at the front end of the main water pipe, a plurality of radially extending water diversion pipes are provided on the outer wall of the central water diversion head, one end of the water diversion pipe is connected with the main water pipe through the central water diversion head, and the other end of the water diversion pipe passes through the second roller and is connected with the inner cavity of the second jacket; the rear end of the main water pipe passes through the second roller and the discharge box and extends to the outside of the discharge box, a rotating joint is provided at the rear end of the main water pipe, a rear-section water inlet pipe is connected to the rotating joint, and the rear-section water inlet pipe transports cooling water to the main water pipe through the rotating joint.

[0022] By adopting the above technical scheme, under the rotating connection action of the rotary joint, the rear water inlet pipe can reliably transport cooling water to the main water pipe, so that the cooling water can move from the rear end of the second roller toward the front end of the second roller, thereby being opposite to the moving direction of the slag dust. In this way, the rear end of the slag dust can be reliably cooled, thereby improving the cooling effect.

[0023] Optionally, the main water pipe is coaxially arranged with the second roller, and a plurality of the water distribution pipes are arranged at equal intervals within the same circle; a porous baffle is provided in the first jacket on the outside of the discharge pipe, and the baffle cuts off the first jacket, and the cooling water enters the sealed water tank after passing through the baffle.

[0024] By adopting the above technical solution, a plurality of water distribution pipes are arranged at equal intervals, so that the plurality of water distribution pipes and the main water pipe can rotate synchronously, and the main water pipe can be prevented from vibrating, thereby ensuring that the cooling water transported by the rear water inlet pipe can all enter the second jacket. Under the action of the baffle, the cooling water level in the second jacket will increase, thereby increasing the contact area between the cooling water and the second drum, and further improving the cooling effect on the slag dust.

[0025] Optionally, a supporting roller is provided on the outer side of the rear end of the second jacket and the outer sides of the two first jackets, a driven gear is sleeved on the outer side of the front end of the second jacket, a driving gear is adapted to be provided on the outer side of the driven gear, and an electric motor is provided on the steel bracket, and the electric motor is used to drive the driving gear to rotate.

[0026] By adopting the above technical solution, the driving gear is meshed with the driven gear. In this way, after the motor drives the driving gear to rotate, the driving gear can reliably drive the driven gear to rotate, so that the first jacket and the second jacket can rotate under the support of the supporting roller, thereby realizing the reliable rotation of the first roller and the second roller.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. The first drum is arranged in a sealed water tank, and the front-end cooling effect on the slag dust in the first drum is achieved by spraying and immersing. The second jacket wraps the second drum and cooling water is arranged in the second jacket. The cooling water moves toward the sealed water tank to achieve the rear-end cooling effect on the slag dust in the second drum. While ensuring the reliable cooling of the slag dust, the collection and reuse of the cooling water is achieved. At the same time, the spreading of cooling water or the dispersion of dust is avoided, and the environment of the equipment site is improved.

[0029] 2. The inner diameter of the first drum is larger than that of the second drum, which can achieve the effect of storing the dust in the first drum and evenly transporting it to the second drum. At the same time, the first drum is arranged in a sealed water tank. After receiving the dust at the highest temperature, the first drum has enough space for a certain degree of free expansion without squeezing other components, effectively avoiding the occurrence of water leakage.

[0030] 3. The discharge pipe on the first roller is connected to the second roller through a flange, which is convenient for transportation and assembly and installation on site, reducing the cost of equipment transportation and installation.

[0031] 4. A heat exchange unit is arranged in the first drum and a cavity is arranged in the guide plate, which significantly increases the indirect contact area between the cooling water and the slag dust, thereby improving the cooling effect on the slag dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the prior art;

[0033] Figure 2 It is a schematic diagram of the structure of this application;

[0034] Figure 3 It is a schematic diagram of the internal structure of the sealed water tank in this application;

[0035] Figure 4 is a reference diagram of the assembly state of the first roller and the second roller;

[0036] Figure 5 is a reference diagram of the assembly state of the second roller and the second jacket;

[0037] Figure 6 is a schematic diagram of the internal structure of the first roller;

[0038] Figure 7 is a schematic diagram of the internal structure of the second roller;

[0039] In the figure: 1, steel bracket; 11, supporting roller; 12, motor; 120, driving gear;

[0040] 2. Sealed water tank; 21. Spray pipe; 22. Exhaust pipe; 23. Drain pipe;

[0041] 3. first roller; 31. heat exchange unit; 311. heat exchange pipe; 312. ventilation pipe; 32. feed pipe; 321. first jacket; 322. front water inlet pipe; 33. discharge pipe; 331. flange; 332. baffle;

[0042] 4. Second roller; 41. Second jacket; 411. Connecting pipe; 412. Driven gear; 42. Guide plate; 420. Cavity; 43. Water inlet hole; 44. Discharge box; 440. Discharge pipe; 45. Main water pipe; 451. Center water distribution head; 452. Water distribution pipe; 453. Rotary joint; 46. Rear water inlet pipe;

[0043] 5. Slag and dust discharge pipe; 50. Labyrinth seal; 6. Storage tank. DETAILED DESCRIPTION

[0044] The following is combined with Figure 2-6 This application is described in further detail.

[0045] Figure 1 is a schematic diagram of the structure of this application, Figure 2 It is a schematic diagram of the internal structure of the sealed water tank in this application. Figure 1 and Figure 2 The hot water slag cooling machine comprises a steel bracket 1 and a first roller 3 and a second roller 4 arranged on the steel bracket 1. The first roller 3 and the second roller 4 are coaxially arranged, and a feed pipe 32 is arranged at the front end of the first roller 3 and a discharge pipe 33 is arranged at the rear end. The discharge pipe 33 is connected to the second roller 4 through a flange 331, which is convenient for dispersed transportation and can be quickly assembled and installed at the operation site. A discharge box 44 is arranged at the rear end of the second roller 4, and the discharge box 44 is connected to the steel bracket 1 and a discharge pipe 440 is arranged at the bottom of the discharge box 44. The slag dust is transported to the first roller 3 through the slag dust discharge pipe 5, and then transferred to the second roller 4 through the discharge pipe 33, and finally enters the discharge box 44 from the end of the discharge pipe 33 and is discharged through the discharge pipe 440.

[0046] Figure 3 This is a reference diagram of the assembly state of the first roller and the second roller. Figure 3 Combined with Figure 1 and Figure 2A sealed water tank 2 is also provided on the steel bracket 1, the first roller 3 is inserted into the sealed water tank 2, and the feed pipe 32 and the discharge pipe 33 are both located outside the sealed water tank 2. A first jacket 321 is provided outside the feed pipe 32 and the discharge pipe 33, and a second jacket 41 is provided outside the second roller 4. A support roller 11 is provided outside the rear end of the second jacket 41 and outside the two first jackets 321, and the three support rollers 11 are connected to the steel bracket 1, so that the support function of the first jacket 321 and the second jacket 41 is achieved, and it is ensured that the first roller 3 and the second roller 4 can be in a horizontal state and connected to each other in a coaxial state. Furthermore, a driven gear 412 is sleeved on the outer side of the front end of the second jacket 41, and a driving gear 120 is adaptively provided on the outer side of the driven gear 412 (i.e., the driving gear 120 and the driven gear 412 are meshed with each other), and a motor 12 is provided on the steel bracket 1, and the motor 12 drives the driving gear 120 to rotate, and the driving gear 120 drives the driven gear 412 to rotate, thereby realizing the synchronous rotation of the first jacket 321 and the second jacket 41, and also realizing the driving effect on the first roller 3 and the second roller 4, ensuring that the first roller 3 and the second roller 4 can reliably rotate around themselves under the action of the supporting roller 11. Furthermore, a plurality of guide plates 42 groups are provided on the inner walls of the first roller 3 and the second roller 4, and each guide plate 42 group includes a plurality of guide plates 42 that are spirally arranged and spaced apart, so that under the action of a plurality of guide plates 42 groups, the slag dust can smoothly move in the first roller 3 and the second roller 4. The discharge box 44 is wrapped around the outer side of the rear end of the second drum 4 and remains stationary, so that the slag dust can fall into the discharge box 44 under the action of the guide plate 42 group.

[0047] See also Figure 1 and Figure 2 A front water inlet pipe 322 is provided on the first jacket 321 located outside the feed pipe 32. The front water inlet pipe 322 delivers cooling water to the first jacket 321. At the same time, the first jacket 321 is connected to the sealed water tank 2, so that the cooling water will flow into the sealed water tank 2 after cooling the feed pipe 32. The cooling effect of the cooling water on the feed pipe 32 and the first jacket 321 can, on the one hand, achieve a cooling effect on the slag dust, and on the other hand, can prevent the wear resistance of the first jacket 321 from being reduced due to high temperature softening, and also prevent the support roller 11 directly in contact with the first jacket 321 from becoming wear-resistant due to high temperature annealing.

[0048] Figure 4 This is a reference diagram of the assembly state of the second roller and the second jacket. Figure 4 Combined with Figure 3, the first jacket 321 located outside the discharge pipe 33 is connected to the second jacket 41 through a plurality of connecting pipes 411. A main water pipe 45 is inserted at the rear end of the second drum 4, the front end of the main water pipe 45 is located inside the second drum 4, and the rear end of the main water pipe 45 passes through the second drum 4 and the discharge box 44 and extends to the outside of the discharge box 44. A central water diversion head 451 is provided at the front end of the main water pipe 45, and a plurality of water diversion pipes 452 are provided on the outer wall of the central water diversion head 451, the water diversion pipes 452 are connected to the central water diversion head 451, and the plurality of water diversion pipes 452 extend along the radial direction of the central water diversion head 451, and the plurality of water diversion pipes 452 are arranged at intervals within the same circumference, one end of the water diversion pipe 452 is connected to the central water diversion head 451, and the other end of the water diversion pipe 452 passes through the inner wall of the second drum 4 and communicates with the inner cavity of the second jacket 41. A rotary joint 453 is provided at the rear end of the main water pipe 45 , and a rear water inlet pipe 46 is provided at the lower part of the rotary joint 453 . The rear water inlet pipe 46 is connected to the rotary joint 453 and transports cooling water to the main water pipe 45 through the rotary joint 453 .

[0049] The main water pipe 45, the central water diverter 451 and the water diverter 452 are connected in sequence, and the water diverter 452 is welded to the second roller 4, so that the second roller 4 can drive the water diverter 452, the central water diverter 451 and the main water pipe 45 to rotate simultaneously during the rotation. Under the connection of the rotary joint 453, the rear water inlet pipe 46 can remain stationary, thus ensuring that the rear water inlet pipe 46 can reliably supply water to the main water pipe 45, so that the cooling water can enter the inner cavity of the second jacket 41 through the water diverter 452. When the cooling water transported by the rear water inlet pipe 46 enters the inner cavity of the second jacket 41 from the rear end of the second jacket 41, it will move toward the front end of the second jacket 41, and enter the first jacket 321 through the connecting pipe 411, and then enter the sealed water tank 2 from the first jacket 321.

[0050] See also Figure 2 and Figure 3 Furthermore, a porous baffle 332 is provided on the inner side of the first jacket 321 located outside the discharge pipe 33 and close to one end of the sealed water tank 2. After the cooling water in the second jacket 41 enters the first jacket 321, it needs to pass through the holes on the baffle 332 to enter the sealed water tank 2. In this way, the water level of the cooling water in the second jacket 41 and the first jacket 321 located outside the discharge pipe 33 will be increased, which can increase the contact area between the cooling water and the second roller 4 and the discharge pipe 33, thereby improving the cooling effect of the cooling water on the second roller 4.

[0051] See also Figure 2 Figure 4A spray pipe 21 is provided at the inner top of the sealed water tank 2. The spray pipe 21 sprays cooling water toward the top of the first roller 3. The cooling water will accumulate in the sealed water tank 2 after flowing through the top of the first roller 3. In this way, the cooling water delivered by the front water inlet pipe 322 will flow into the sealed water tank 2 after cooling the feed pipe 32 and the corresponding first jacket 321, the cooling water delivered by the rear water inlet pipe 46 will flow into the sealed water tank 2 after cooling the second roller 4 and the discharge pipe 33, and the cooling water delivered by the spray pipe 21 will also flow into the sealed water tank 2 after cooling the first roller 3. The three streams of cooling water are gathered in the sealed water tank 2, so that the lower part of the first roller 3 can be immersed in the cooling water.

[0052] See also Figure 1 Since the inner diameter of the first roller 3 is larger than that of the second roller 4, a large amount of slag dust can be instantly received in the first roller 3. When the slag dust falls from the slag dust discharge pipe 5 into the feed pipe 32 and moves into the first roller 3, the slag dust will turn over in the first roller 3 and move toward the discharge pipe 33. In this process, the slag dust will adhere to the inner wall of the first roller 3, thereby transferring its own heat to the first roller 3. The upper part of the first roller 3 is cooled by spraying, and the lower part is cooled by immersion, which can quickly transfer the heat of the slag dust to the cooling water, realize the front-end cooling of the slag dust, and make the cooling water absorb heat and heat up to become hot water. The inner diameter of the first roller 3 is relatively large, and the temperature of the slag dust is as high as 800°C when entering the first roller 3, which will cause the temperature of the first roller 3 to rise rapidly and then expand to a certain extent. Since the first roller 3 is arranged in the sealed water tank 2, the first roller 3 has enough space for its own expansion and will not cause squeezing of other components, which effectively prevents water leakage while ensuring the cooling effect. At the same time, the sealed water tank 2 can improve the utilization efficiency of cooling water by retaining cooling water, thereby reducing the amount of cooling water used.

[0053] The inner diameter of the feed pipe 32 is the same as that of the discharge pipe 33, and both are smaller than the inner diameter of the first roller 3. The discharge pipe 33 is butted with the second roller 4 through the flange 331, and the inner diameter of the discharge pipe 33 is the same as that of the second roller 4, ensuring that the slag dust after the front stage cooling can reliably enter the second roller 4 through the discharge pipe 33 under the push of the guide plate 42 group. The slag dust moves from front to back in the second roller 4, and the cooling water in the second jacket 41 flows from back to front, so that the rear stage cooling of the slag dust can be reliably realized, and the cooling effect of the slag dust is effectively improved.

[0054] See also Figure 2 and Figure 3After absorbing heat and heating up, the temperature of the cooling water in the second jacket 41 is still lower than the cooling water accumulated in the sealed water tank 2. In this way, when the cooling water in the second jacket 41 enters the sealed water tank 2, it can also achieve the cooling effect on the first roller 3. An exhaust pipe 22 is provided at the top of the sealed water tank 2, and a drain pipe 23 is provided at the bottom. The connection between the drain pipe 23 and the sealed water tank 2 is located below the feed pipe 32. In this way, a large amount of water vapor generated during the front-stage cooling can be discharged to the outside through the exhaust pipe 22, and the heated hot water is discharged to the outside through the drain pipe 23. The discharge of water vapor can reduce the pressure in the sealed water tank 2, ensuring that the cooling water in the first jacket 321 and the second jacket 41 can reliably flow into the sealed water tank 2, thereby ensuring that the cooling effect on the first roller 3 is continuous and reliable.

[0055] Furthermore, the drain pipe 23 can be connected to the storage tank, so that after the room temperature cooling water cools the slag dust and becomes hot water, its temperature is raised to 80-90°C. The hot water can be reused after being stored in the storage tank, thereby reducing the energy consumption of the equipment using the hot water. For example, in boiler feed water treatment, it is necessary to remove oxygen and other gases in the boiler feed water by steam heating, that is, it is necessary to use steam to heat room temperature water of about 25°C to 104°C. When the hot water after cooling the slag dust is used as the water source, the initial temperature is higher, which can greatly reduce the use of steam and improve energy utilization.

[0056] See also Figure 2 and Figure 4 The slag dust discharge pipe 5 extends to the inner side of the feed pipe 32, and a labyrinth seal 50 is provided between the slag dust discharge pipe 5 and the feed pipe 32, which ensures that the slag dust will not be scattered at the operation site during the discharge process. At the same time, the first roller 3 is enclosed in the sealed water tank 2, and the second roller 4 is enclosed in the second jacket 41. Multiple streams of cooling water are collected and discharged through the sealed water tank 2, which effectively prevents the cooling water from spreading at the operation site, improves the environment of the operation site and improves the safety of the operation.

[0057] Figure 5 is a schematic diagram of the internal structure of the first roller. Figure 5A plurality of heat exchange units 31 are also provided on the inner wall of the first drum 3. The plurality of heat exchange units 31 are staggered on the inner side of the first drum 3. Each heat exchange unit 31 includes a pair of heat exchange tubes 311 and a ventilation tube 312. The pair of heat exchange tubes 311 are spaced apart in the vertical direction. One end of the heat exchange tube 311 is closed and the other end is provided with an opening. The end of the heat exchange tube 311 provided with the opening extends to the outer side of the first drum 3. The closed end of the heat exchange tube 311 is located on the inner side of the first drum 3 and is connected to the ventilation tube 312. That is to say, one end of the ventilation tube 312 is connected to one heat exchange tube 311, and the other end of the ventilation tube 312 is connected to another heat exchange tube 311. In this way, the inner cavity of the sealed water tank 2, the inner cavity of the ventilation tube 312 and the inner cavities of the two heat exchange tubes 311 are in a state of being connected to each other. The outer wall of the first roller 3 and the heat exchange tube 311 as well as the inner wall of the first roller 3 and the heat exchange tube 311 can be welded to improve the connection strength of the heat exchange tube 311 and effectively prevent cooling water from entering the inner side of the first roller 3.

[0058] When the first roller 3 rotates in the sealed water tank 2, a heat exchange tube 311 will first be immersed in the cooling water accumulated at the bottom of the sealed water tank 2. As the first roller 3 continues to rotate, the cooling water will enter the heat exchange tube 311, and the air in the heat exchange tube 311 will be discharged through the vent pipe 312 and another heat exchange tube 311. In this way, during the rotation of the first roller 3, the cooling water will enter the heat exchange unit 31 and flow in the heat exchange unit 31. When the heat exchange unit 31 rotates to above the liquid level of the cooling water, the cooling water will flow out of the heat exchange unit 31. In other words, the cooling water can flow into the heat exchange unit 31, and then be discharged from the heat exchange unit 31 after absorbing the heat of the slag dust. The heat exchange unit 31 is in direct contact with the slag dust, which significantly increases the heat exchange area and improves the cooling effect of the slag dust.

[0059] Figure 6 is a schematic diagram of the internal structure of the second roller. Figure 6 Combined with Figure 5 The guide plate 42 is welded on the inner walls of the first roller 3 and the second roller 4, and a cavity 420 is provided in the guide plate 42, and a plurality of water inlet holes 43 are provided on the inner walls of the first roller 3 and the second roller 4, each cavity 420 is connected with at least two water inlet holes 43, and each water inlet hole 43 on the first roller 3 is used to connect the cavity 420 of the guide plate 42 on the inner wall of the first roller 3 with the inner cavity of the sealed water tank 2, and each water inlet hole 43 on the second roller 4 is used to connect the cavity 420 of the guide plate 42 on the inner wall of the second roller 4 with the inner cavity of the second jacket 41, so that the cooling water can enter the cavity 420 through the water inlet hole 43 without entering the inner side of the first roller 3 or the inner side of the second roller 4.

[0060] Since the guide plate 42 is also in direct contact with the slag dust, when the cooling water enters the cavity 420, it can quickly absorb the heat transferred from the slag dust to the guide plate 42, thereby increasing the heat exchange area and further improving the cooling effect of the slag dust.

[0061] In the present application, the motor 12 can drive the first roller 3 and the second roller 4 to run at a speed of 3-4 r / min, prolonging the residence time of the slag dust in the first roller 3 and the second roller 4, thereby improving the cooling effect of the slag dust and reducing the wear of each component, thereby prolonging the service life. When the slag dust completes the front-end cooling and the rear-end cooling and is discharged through the discharge pipe 440, its temperature can be reduced from about 800°C to 80-100°C, which meets the conditions of adding water to humidify and solidify, meets the conditions of belt conveyor and automobile transportation, and meets the national requirements for the treatment of slag dust.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Hot water slag cooler, characterized in that: It comprises a steel bracket (1), on which a sealed water tank (2) and a first roller (3) and a second roller (4) which are interconnected and coaxially arranged are provided, and the slag dust to be cooled passes through the first roller (3) and the second roller (4) in sequence; The first roller (3) is arranged in the sealed water tank (2), and a spray pipe (21) for spraying cooling water is arranged on the inner side of the sealed water tank (2); A plurality of heat exchange units (31) for increasing the heat exchange area are provided on the inner wall of the first roller (3), a second jacket (41) is provided on the outer side of the second roller (4), the second jacket (41) and the heat exchange unit (31) are both connected to the sealed water tank (2), and cooling water is provided in the second jacket (41) so as to flow toward the sealed water tank (2).

2. The hot water slag cooler according to claim 1, characterized in that: A plurality of the heat exchange units (31) are staggeredly arranged on the inner side of the first drum (3), each of the heat exchange units (31) comprising a pair of heat exchange tubes (311) and a ventilation tube (312), the ventilation tube (312) being connected to the pair of heat exchange tubes (311), and one end of the heat exchange tube (311) not connected to the ventilation tube (312) extending to the outer side of the first drum (3).

3. The hot water slag cooler according to claim 2, characterized in that: The heat exchange tube (311) is welded to the first roller (3); the inner cavity of the heat exchange tube (311) is connected to the inner cavity of the sealed water tank (2); the inner cavity of the heat exchange tube (311) is connected to the inner cavity of the ventilation tube (312); and the inner cavity of the heat exchange tube (311) and the inner cavity of the first roller (3) are isolated from each other.

4. The hot water slag cooler according to claim 2, characterized in that: A plurality of material guide plate (42) groups are welded on the inner wall of the first roller (3) and the inner wall of the second roller (4), each of the material guide plate (42) groups comprises a plurality of material guide plates (42), and the plurality of material guide plates (42) are arranged in a spiral shape at intervals.

5. The hot water slag cooler according to claim 4, characterized in that: A cavity (420) is provided in the guide plate (42), and a plurality of water inlet holes (43) are provided on the inner wall of the first roller (3) and the inner wall of the second roller (4), each of the cavity (420) is connected to at least two of the water inlet holes (43), and each of the water inlet holes (43) is connected to the corresponding cavity (420).

6. The hot water slag cooler according to claim 4, characterized in that: The front end of the first roller (3) is provided with a feed pipe (32) and the rear end is provided with a discharge pipe (33), the feed pipe (32) and the discharge pipe (33) are both located outside the sealed water tank (2), the feed pipe (32) is connected to the slag dust discharge pipe (5), and the discharge pipe (33) is connected to the front end of the second roller (4) via a flange (331); A discharge box (44) is provided at the rear end of the second roller (4), the discharge box (44) is sleeved on the outer side of the second roller (4) and connected to the steel bracket (1), and a discharge pipe (440) is provided at the bottom of the discharge box (44); The inner diameters of the feed pipe (32) and the discharge pipe (33) are the same and are both smaller than the inner diameter of the first roller (3); the inner diameter of the discharge pipe (33) is the same as the inner diameter of the second roller (4); the outer sides of the feed pipe (32) and the discharge pipe (33) are both provided with a first jacket (321); the top of the first jacket (321) outside the feed pipe (32) is provided with a front water inlet pipe (322) for conveying cooling water; the first jacket (321) outside the discharge pipe (33) is connected to the second jacket (41) via a plurality of connecting pipes (411).

7. The hot water slag cooler according to claim 6, characterized in that: The top of the sealed water tank (2) is provided with an exhaust pipe (22) for discharging water vapor, and the bottom is provided with a drain pipe (23) for discharging hot water, and the connection point between the drain pipe (23) and the sealed water tank (2) is located below the feed pipe (32); The slag dust discharge pipe (5) extends to the inner side of the feed pipe (32) and a labyrinth seal (50) is provided between the end surface of the feed pipe (32).

8. The hot water slag cooler according to claim 6, characterized in that: A main water pipe (45) is inserted into the second roller (4), the front end of the main water pipe (45) is located inside the rear end of the second roller (4), a central water diversion head (451) is provided at the front end of the main water pipe (45), a plurality of water diversion pipes (452) extending radially are provided on the outer wall of the central water diversion head (451), one end of the water diversion pipe (452) is connected to the main water pipe (45) through the central water diversion head (451), and the other end of the water diversion pipe (452) passes through the second roller (4) and is connected to the inner cavity of the second jacket (41); The rear end of the main water pipe (45) passes through the second roller (4) and the discharge box (44) and extends to the outside of the discharge box (44). The rear end of the main water pipe (45) is provided with a rotating joint (453). The rotating joint (453) is connected to a rear water inlet pipe (46). The rear water inlet pipe (46) transports cooling water to the main water pipe (45) through the rotating joint (453).

9. The hot water slag cooler according to claim 8, characterized in that: The main water pipe (45) is coaxially arranged with the second drum (4), and a plurality of the water branch pipes (452) are arranged at equal intervals within the same circle; A porous baffle (332) is provided in the first jacket (321) outside the discharge pipe (33), and the baffle (332) cuts off the first jacket (321). The cooling water passes through the baffle (332) and then enters the sealed water tank (2).

10. The hot water slag cooler according to any one of claims 6 to 9, characterized in that: A supporting roller (11) is provided on the outer side of the rear end of the second jacket (41) and on the outer sides of the two first jackets (321); a driven gear (412) is sleeved on the outer side of the front end of the second jacket (41); a driving gear (120) is adapted to be provided on the outer side of the driven gear (412); and an electric motor (12) is provided on the steel bracket (1); the electric motor (12) is used to drive the driving gear (120) to rotate.

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