A device for cooling and waste heat recovery of high-temperature magnesium oxide powder

Abstract

The utility model discloses a kind of high-temperature magnesium oxide powder cooling and waste heat recovery's device, specifically related to magnesium oxide powder cooling technical field.The utility model is high-temperature magnesium oxide powder cooling and waste heat recovery's device, including rack, the inside fixed connection of rack has feeding cylinder, the inside rotary connection of feeding cylinder has spiral shaft, the motor is equipped below feeding cylinder and drives spiral shaft rotation in feeding cylinder of rack, the top of feeding cylinder is equipped with feed inlet and is fixedly connected with star feeder one, the bottom of feeding cylinder is equipped with discharge port and is fixedly connected with star feeder two, water cooling heat exchange module and hot air heat exchange module are equipped outside feeding cylinder of this device, cooling water absorbs material heat in water cooling heat exchange module and can be used for subsequent production, while hot air heat exchange module absorbs water cooling module waste heat through heat dissipation plate, heats clean air after dust removal to generate hot air, also can be used for calcining kiln combustion-supporting, avoid heat waste.

Description

Technical Field

[0001] This utility model relates to the field of magnesium oxide powder cooling, and in particular to a device for cooling and recovering waste heat from high-temperature magnesium oxide powder. Background Technology

[0002] In the magnesium oxide powder production process, the magnesium oxide powder is at a high temperature after calcination in a kiln. Currently, the industry mainly uses various cooling devices to cool the high-temperature magnesium oxide powder, without recovering the waste heat released during the cooling process.

[0003] Existing hot air heat exchange devices only exchange heat with the material by flowing through the outside of the air conveyor cylinder. The hot air after heat exchange is also directly discharged into the outside air. Furthermore, some magnesium oxide powder may be scattered during the feeding, discharging, and conveying processes, polluting the air and endangering the health of operators. Utility Model Content

[0004] The main purpose of this invention is to provide a device for cooling and recovering waste heat from high-temperature magnesium oxide powder, which can effectively solve the problems of traditional devices being unable to recover waste heat and the possibility of dust escaping around the device.

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

[0006] A device for cooling and recovering waste heat of high-temperature magnesium oxide powder includes a frame. A feeding cylinder is fixedly connected inside the frame, and a screw shaft is rotatably connected inside the feeding cylinder. A motor is installed below the feeding cylinder on the frame to drive the screw shaft inside the feeding cylinder to rotate. A feed inlet is provided above the feeding cylinder and a star-shaped feeder is fixedly connected thereto. A discharge outlet is provided at the bottom of the feeding cylinder and a star-shaped feeder is fixedly connected thereto. A water-cooled heat exchange module is fixedly connected to the outside of the feeding cylinder. A hot air heat exchange module is fixedly connected to the outside of the water-cooled heat exchange module. A dust removal module is fixedly connected below the hot air heat exchange module on the frame.

[0007] Preferably, a heat exchange plate is fixedly connected to the outer wall of the feeding cylinder, and two housings are fixedly connected to the outside of the heat exchange plate. A fixing ring is fixedly connected to the inner side of each of the two housings, and a heat-conducting shell is fixedly connected between the two fixing rings.

[0008] Preferably, a flow-to-fixing rib is fixedly connected to the inner side of the first fixing ring, a second fixing ring is fixedly connected to the inner side of the flow-to-fixing rib, and sealing rings are fixedly connected to both the left and right ends of the first fixing ring.

[0009] Preferably, the flow-to-fixing rib is fixedly connected to the heat exchange plate.

[0010] Preferably, the hot air heat exchange module includes a heat dissipation plate, which is located on the outer wall of the water-cooled heat exchange module and fixedly connected to the water-cooled heat exchange module. A hot air cavity is fixedly connected to the outside of the heat dissipation plate of the water-cooled heat exchange module, and a ventilation pipe is fixedly connected to the right side of the hot air cavity.

[0011] Preferably, the dust removal module includes a dust removal chamber housing, a filter bag is fixedly connected inside the dust removal chamber housing, an air outlet and a fan are provided on the right side of the filter bag, the air outlet of the dust removal chamber housing is fixedly connected to the other end of a ventilation pipe, and an air inlet pipe is fixedly connected to the left side of the dust removal chamber housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder. The device is equipped with a water-cooled heat exchange module and a hot air heat exchange module outside the feeding cylinder. The cooling water in the water-cooled heat exchange module absorbs the heat of the material and can be used for subsequent production. At the same time, the hot air heat exchange module absorbs the waste heat of the water-cooled module through the heat dissipation plate and heats the clean air that has been dusted to generate hot air, which can also be used to assist combustion in the calcination kiln and avoid heat waste.

[0014] 2. This utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder. The feeding star feeder 1 and the discharging star feeder 2 realize closed conveying and block dust at the source. The dust removal module draws in dust-laden gas through the air inlet pipe, and after being filtered by the filter bag, the clean air is used for hot air heat exchange to prevent dust from leaking out and polluting the environment and endangering personnel health. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the water-cooled heat exchange module of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fixing ring of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the hot air heat exchange module of this utility model;

[0019] Figure 5 This is a schematic diagram of the dust removal module of this utility model.

[0020] In the diagram: 1. Frame; 2. Water-cooled heat exchange module; 3. Hot air heat exchange module; 4. Star feeder one; 5. Feeding cylinder; 6. Dust removal module; 7. Star feeder two; 21. Housing one; 22. Fixing ring one; 23. Heat exchange plate; 24. Heat-conducting shell; 25. Flow to fixing rib; 26. Fixing ring two; 27. Sealing ring; 31. Hot air chamber; 32. Heat dissipation plate; 33. Ventilation pipe; 61. Dust removal chamber housing; 62. Filter bag; 63. Air inlet pipe. Detailed Implementation

[0021] 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.

[0022] like Figure 1 As shown, this utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder, including a frame 1. A feeding cylinder 5 is fixedly connected inside the frame 1. A screw shaft is rotatably connected inside the feeding cylinder 5. A motor is installed below the feeding cylinder 5 on the frame 1 to drive the screw shaft inside the feeding cylinder 5 to rotate. A feed inlet is provided above the feeding cylinder 5 and a star feeder 4 is fixedly connected thereto. A discharge outlet is provided at the bottom of the feeding cylinder 5 and a star feeder 7 is fixedly connected thereto. The outer side of the feeding cylinder 5 is fixedly connected to... There is a water-cooled heat exchange module 2, and a hot air heat exchange module 3 is fixedly connected to the outside of the water-cooled heat exchange module 2. A dust removal module 6 is fixedly connected to the frame 1 below the hot air heat exchange module 3. When the material moves in the feeding cylinder 5, the water-cooled heat exchange module 2 on the outside absorbs the heat of the material through cooling water to achieve cooling. The hot air heat exchange module 3 recovers the waste heat of the water-cooled heat exchange module 2 to heat the air. The dust removal and recovery component 6 simultaneously sucks in the dust-laden gas near the feeding cylinder 5, filters it, and provides a clean air source for the hot air heat exchange module 3.

[0023] like Figure 2 As shown, this utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder. A heat exchange plate 23 is fixedly connected to the outer wall of the feeding cylinder 5. Two shells 21 are fixedly connected to the outer side of the feeding cylinder 5 on the heat exchange plate 23. A fixing ring 22 is fixedly connected to the inner side of each of the two shells 21. A heat-conducting shell 24 is fixedly connected between the two fixing rings 22. An external water supply system inputs cooling water into the fixing rings 22 through the shells 21. At the same time, the fixing rings 22 and the heat-conducting shell 24 on the inner side of the outer wall of the feeding cylinder 5 form a closed flow channel. When the cooling water flows through the heat exchange plate 23, the heat exchange plate 23 transfers the heat of the high-temperature material in the feeding cylinder 5 to the cooling water, thereby reducing the temperature of the material. The cooled water after absorbing heat flows out from the shell 21 on the other side and is used for subsequent process heat. The heat-conducting shell 24 connects the fixing rings 22 on both sides to prevent the flow channel from deforming due to water flow impact, while maintaining the overall sealing of the flow channel and ensuring the continuous and stable heat exchange process.

[0024] like Figure 3As shown, this utility model provides a device for cooling and recovering waste heat from high-temperature magnesium oxide powder. A flow channel fixing rib 25 is fixedly connected to the inner side of a fixing ring 22, and a fixing ring 26 is fixedly connected to the inner side of the flow channel fixing rib 25. Sealing rings 27 are fixedly connected to both ends of the fixing ring 22. The flow channel fixing rib 25 is fixedly connected to the heat exchange plate 23. The sealing rings 27 at both ends of the fixing ring 22 fit against the inner wall of the flow channel, filling the assembly gap between the fixing ring 22 and other components, and blocking the path of cooling water leakage from both ends of the flow channel. To prevent heat exchange efficiency from being affected by cooling water loss and to prevent water leakage from damaging other components of the device, one end of the flow channel fixing rib 25 on the inner side of the fixing ring 22 is fixedly connected to the heat exchange plate 23, and the other end is fixed to the fixing ring 26. The flow channel fixing rib 25 not only fixes the fixing ring 22, the fixing ring 26 and the heat exchange plate 23, preventing the components from shifting due to thermal expansion or water flow impact during operation, but also increases the flow resistance of cooling water in the flow channel, prolongs the contact time between cooling water and heat exchange plate 23, and allows the cooling water to absorb heat more fully.

[0025] like Figure 4 As shown, this utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder. The hot air heat exchange module 3 includes a heat dissipation plate 32, which is located on the outer wall of the water-cooled heat exchange module 2 and fixedly connected to the water-cooled heat exchange module 2. A hot air cavity 31 is fixedly connected to the outside of the heat dissipation plate 32 in the water-cooled heat exchange module 2. A ventilation pipe 33 is fixedly connected to the right side of the hot air cavity 31. The hot air cavity 31 is wrapped around the outside of the water-cooled heat exchange module 2 to form a closed flow space for hot air. The heat dissipation plate 32 fixed on the outer wall of the water-cooled heat exchange module 2 is directly connected to the inside of the hot air cavity 31. The heat dissipation plate 32 can quickly transfer the heat of the cooling water in the water-cooled heat exchange module 2 to the hot air cavity 31. The heated hot air can be discharged from the outlet of the hot air cavity 31 and used for subsequent processes, reducing the overall production energy consumption.

[0026] like Figure 5As shown, this utility model provides a device for cooling and recovering waste heat of high-temperature magnesium oxide powder. The dust removal module 6 includes a dust removal chamber shell 61, a filter bag 62 fixedly connected inside the dust removal chamber shell 61, an air outlet and a fan on the right side of the filter bag 62, the air outlet of the dust removal chamber shell 61 being fixedly connected to the other end of the ventilation pipe 33, and an air inlet pipe 63 fixedly connected to the left side of the dust removal chamber shell 61. After the fan on the right side of the dust removal chamber shell 61 is started, a negative pressure is formed in the chamber. The feeding cylinder 5 is attached... Dust-laden gas that may escape is drawn into the dust removal chamber housing 61 through the air inlet pipe 63. After entering the dust removal chamber housing 61, the dust-laden gas is first filtered by the filter bag 62. The magnesium oxide dust in the gas is intercepted on the surface by the filter bag 62. The filtered clean air flows through the filter bag 62 to the air outlet of the dust removal chamber housing 61. This not only prevents dust from escaping into the outside air and causing pollution and harming the health of operators, but also avoids dust from entering the hot air chamber 31 and adhering to the surface of the heat sink 32, thus affecting the heat exchange efficiency of the hot air heat exchange module 3.

[0027] The working principle of this high-temperature magnesium oxide powder cooling and waste heat recovery device will be explained in detail below.

[0028] like Figure 1-5As shown, high-temperature magnesium oxide powder first enters the feeding cylinder 5 from the star feeder 4. The sealed structure of the star feeder 4 prevents dust from flying during feeding and simultaneously achieves quantitative material conveying, avoiding material accumulation inside the feeding cylinder 5. Then, the motor below the frame 1 starts, driving the spiral shaft inside the feeding cylinder 5 to rotate. The spiral shaft drives the material to move slowly along the feeding cylinder 5 from the feeding end to the discharge end. The cooled magnesium oxide powder reaches the discharge port at the bottom of the feeding cylinder 5 and is discharged through the sealed star feeder 7. The tight connection between the star feeder 7 and the feeding cylinder 5 prevents external air from entering the cylinder during the discharge process and disrupting the heat exchange environment, while also preventing dust from escaping. Then, the external water supply system inputs room temperature cooling water into the water-cooled heat exchange module 2 through the water valve on the housing 21. Water, shell 21, fixed ring 22, and heat-conducting shell 24 together form a closed cooling water flow channel, ensuring that the cooling water only flows within the channel and does not leak. The heat exchange plate 23 fixed on the outer wall of the feeding cylinder 5 is in direct contact with the cooling water in the flow channel. The heat of the high-temperature material in the feeding cylinder 5 is transferred to the heat exchange plate 23 through the cylinder wall, and then efficiently transferred to the cooling water by the heat exchange plate 23, which raises the temperature of the cooling water and lowers the temperature of the material rapidly. One end of the flow channel fixing rib 25 is fixedly connected to the heat exchange plate 23, and the other end is fixed to the fixed ring 26. This not only enhances the structural stability of the fixed ring 22, the fixed ring 26, and the heat exchange plate 23, but also increases the flow resistance of the cooling water in the flow channel, prolongs the contact time between the cooling water and the heat exchange plate 23, and allows for more complete heat absorption. Cooling water, after absorbing heat, flows out from the other side of the shell 21 and can be directly used for production processes or domestic heating, achieving preliminary waste heat recovery. During operation, the fan on the right side of the dust removal chamber shell 61 in the dust removal module 6 also starts simultaneously, creating negative pressure within the chamber. This negative pressure draws in dust-laden gas that may be escaping from near the feeding cylinder 5 through the air inlet pipe 63. After entering the dust removal chamber shell 61, the dust-laden gas is filtered by the filter bag 62. Magnesium oxide dust is intercepted on the surface of the filter bag 62, and the filtered clean air passes through the filter bag 62 and enters the ventilation pipe 33 through the air outlet of the dust removal chamber shell 61. The clean air is then transported by the ventilation pipe 33 to the hot air chamber 31 of the hot air heat exchange module 3. The hot air chamber 31 is wrapped around the outside of the water-cooled heat exchange module 2, forming a closed hot air circulation system. The heat dissipation plate 32 fixed on the outer wall of the water-cooled heat exchange module 2 is directly connected to the hot air cavity 31, transferring the waste heat of the cooling water in the water-cooled heat exchange module 2 to the clean air, raising the air temperature and forming usable hot air. The heated hot air is discharged from the outlet of the hot air cavity 31 and can be reused for combustion in the calcining kiln or other heat-requiring processes, realizing the cascade recovery and recycling of waste heat. The sealed design of the star feeder 4 at the feed end and the star feeder 7 at the discharge end blocks the dust from escaping during the material conveying process. The dust removal module 6 actively captures the dust-laden gas near the feeding cylinder 5 through the air inlet pipe 63. After being filtered by the filter bag 62, the dust is trapped in the dust removal cavity shell 61, and the clean air is used for hot air heat exchange, avoiding dust leakage that pollutes the environment and harms the health of operators.

[0029] 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 device for cooling and recovering waste heat from high-temperature magnesium oxide powder, comprising a frame (1), characterized in that: The frame (1) is fixedly connected to a feeding cylinder (5), and a spiral shaft is rotatably connected inside the feeding cylinder (5). The frame (1) is provided with a motor below the feeding cylinder (5) and drives the spiral shaft inside the feeding cylinder (5) to rotate. The feeding cylinder (5) is provided with a feed inlet above and a star feeder (4) is fixedly connected thereto. The feeding cylinder (5) is provided with a discharge outlet at the bottom and a star feeder (7) is fixedly connected thereto. A water-cooled heat exchange module (2) is fixedly connected to the outside of the feeding cylinder (5). A hot air heat exchange module (3) is fixedly connected to the outside of the water-cooled heat exchange module (2). A dust removal module (6) is fixedly connected to the frame (1) below the hot air heat exchange module (3).

2. The device for cooling and recovering waste heat of high-temperature magnesium oxide powder according to claim 1, characterized in that: A heat exchange plate (23) is fixedly connected to the outer wall of the feeding cylinder (5). Two shells (21) are fixedly connected to the outside of the heat exchange plate (23). A fixing ring (22) is fixedly connected to the inner side of each of the two shells (21). A heat-conducting shell (24) is fixedly connected between the two fixing rings (22).

3. The device for cooling and recovering waste heat of high-temperature magnesium oxide powder according to claim 2, characterized in that: The inner side of the first fixing ring (22) is fixedly connected to the flow-to-fixing rib (25), the inner side of the flow-to-fixing rib (25) is fixedly connected to the second fixing ring (26), and the left and right ends of the first fixing ring (22) are fixedly connected to the sealing ring (27).

4. The device for cooling and recovering waste heat of high-temperature magnesium oxide powder according to claim 3, characterized in that: The flow to the fixed rib (25) is fixedly connected to the heat exchange plate (23).

5. The device for cooling and recovering waste heat of high-temperature magnesium oxide powder according to claim 4, characterized in that: The hot air heat exchange module (3) includes a heat sink (32), which is located on the outer wall of the water-cooled heat exchange module (2) and is fixedly connected to the water-cooled heat exchange module (2). A hot air cavity (31) is fixedly connected to the outside of the heat sink (32) of the water-cooled heat exchange module (2), and a ventilation pipe (33) is fixedly connected to the right side of the hot air cavity (31).

6. The apparatus for cooling and recovering waste heat of high-temperature magnesium oxide powder according to claim 4, characterized in that: The dust removal module (6) includes a dust removal chamber housing (61), a filter bag (62) is fixedly connected inside the dust removal chamber housing (61), the dust removal chamber housing (61) has an air outlet and a fan on the right side of the filter bag (62), the air outlet of the dust removal chamber housing (61) is fixedly connected to the other end of the ventilation pipe (33), and an air inlet pipe (63) is fixedly connected to the left side of the dust removal chamber housing (61).

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