A top discharge sealing and enhanced cooling spiral conveying device

Abstract

The present invention discloses an upper discharge seal enhanced cooling spiral conveying device, comprising: a cooling cylinder, for passing outer cooling water; a hollow conveying spiral, coaxially arranged inside the cooling cylinder, the central axis of the hollow conveying spiral is a hollow axis, for passing internal cooling water, and short pitch blades, long pitch blades, double-headed blades, upper discharge paddles, and reverse spiral blades are arranged on the central axis from the head to the tail of the spiral in sequence, and a material lifting paddle is arranged between the long pitch blades; a power unit is arranged at both ends of the cooling cylinder, for driving the rotation of the hollow conveying spiral to transport materials; a material inlet is arranged at the feed end of the cooling cylinder; an upper discharge unit is arranged at the discharge end of the cooling cylinder, corresponding to the position of the upper discharge paddle, for discharging the cooled material in the cooling cylinder upward and forming a material seal. The present invention can increase the refrigeration effect on the material under the premise of ensuring the internal sealing of the cooling spiral.

Description

Technical Field

[0001] The invention belongs to the technical field of harmless treatment and resource utilization of solid waste, and in particular to an upper discharge sealing and enhanced cooling spiral conveying device. Background Art

[0002] A spiral cooling device generally refers to a device that uses a spiral to convey high-temperature materials and is supplemented by air or other cooling media to exchange heat between high-temperature materials and low-temperature media. In the process of conveying high-temperature solids, it is necessary to convey materials through a spiral. Existing spiral conveying devices generally use a double-layer cylinder with water injected into the cylinder to cool the high-temperature materials, which has a poor heat exchange effect. In addition, they all use the method of discharging materials from the bottom, which cannot achieve a good sealing effect.

[0003] For example, Chinese patent document with publication number CN212658095 discloses a simple spiral cooling and conveying device; Chinese patent document with publication number CN204298316 discloses a cooling spiral device in which multiple cooling spirals are stacked.

[0004] Although ordinary spiral cooling devices can convey and cool high-temperature materials, different cooling spirals have a significant impact on the performance indicators of high-temperature materials after cooling. In addition, how to ensure the sealing inside the cooling spiral during the process of material discharge from the cooling spiral is a technical problem that urgently needs to be solved. Summary of the invention

[0005] The invention provides an upper discharging sealed and enhanced cooling spiral conveying device, which can increase the refrigeration effect on materials under the premise of ensuring the internal sealing of the cooling spiral.

[0006] A top discharge sealing and enhanced cooling spiral conveying device, comprising:

[0007] The cooling cylinder is used for cooling water outside, including the shell and guide vanes;

[0008] The hollow conveying screw is coaxially arranged inside the cooling cylinder. The central axis of the hollow conveying screw is a hollow shaft for conveying internal cooling water. Short-pitch blades, long-pitch blades, double-headed blades, upper discharging paddles, and reverse spiral blades are arranged on the central axis from the head to the tail of the screw. Material lifting paddles are arranged between some long-pitch blades.

[0009] A power unit is arranged at both ends of the cooling cylinder, including a driving end and a driven end, and is used to drive the rotation of the hollow conveying screw to transport materials;

[0010] The material inlet is arranged at the feeding end of the cooling cylinder and communicates with the interior of the cooling cylinder for the entry of high-temperature materials;

[0011] The upper discharge unit is arranged at the discharge end of the cooling cylinder, corresponding to the position of the upper discharge paddle, and is used to discharge the cooled material in the cooling cylinder upward and form a material seal;

[0012] The present invention adopts a spiral cooling structure with an upper discharge function. During the cooling and conveying process, the high-temperature material is squeezed, ground, and rubbed against the cooling cylinder, the hollow conveying spiral, and the spiral blades thereon to accelerate cooling. After the cooled material reaches the conveyor outlet, it is lifted upward by the upper discharge paddle to seal the material. The high-temperature material lifted by the upper discharge paddle can increase the contact area and contact time of the cooling cylinder.

[0013] Furthermore, the cooling cylinder is provided with a nitrogen inlet for replacing dangerous gases in the gaps between materials and is used to isolate the dangerous gases from being discharged along with the materials.

[0014] Further preferably, the nitrogen inlet is arranged on the left side of the double-ended blade, which can also better guide the flow direction of the nitrogen when the double-ended blade is in operation.

[0015] Furthermore, the cooling cylinder is provided with a cylinder cooling water inlet and a cylinder cooling water outlet near both ends, and the two ends of the hollow conveying screw are provided with a central axis cooling water inlet and a central axis cooling water outlet.

[0016] In order to better monitor the cooling of high-temperature materials in the cooling cylinder, preferably, the cylinder cooling water inlet and the central axis cooling water inlet are connected to the same cooling water mother pipe, and a cooling water inlet temperature measuring point is provided; the cylinder cooling water outlet and the central axis cooling water outlet are both provided with cooling water regulating valves and cooling water outlet temperature measuring points. By setting multiple temperature measuring points on the equipment, real-time monitoring of various operating parameters is achieved, and the best cooling effect is achieved by relying on control logic.

[0017] Furthermore, the cooling water flow direction of the central axis is opposite to the direction of the material, and the cooling water flow direction of the cooling cylinder is the same as the direction of the material. The cooling cylinder is provided with guide vanes, and the cooling water enters the cooling cylinder from the cooling water inlet of the cylinder, and moves forward in a rotating manner through the guide vanes installed in the cylinder, so that the temperature in the cooling cylinder is more uniform, and the cooling efficiency is increased.

[0018] Furthermore, the upper discharge paddle plays the role of stirring high-temperature materials with different degrees of internal and external cooling, and can displace the positions of materials with different internal and external cooling effects so that they can exchange heat with the cooling water that has just entered the central axis, which is beneficial to reducing the temperature of the upper discharge outlet and extending the residence time of the material in the cooling cylinder by raising the height of the material baffle, thereby enhancing the heat exchange.

[0019] Furthermore, the short pitch blades and long pitch blades are respectively arranged on both sides of the material inlet, the pitch of the short pitch blades is 0.2 to 0.25 blade diameters, which is used to limit the natural flow of materials into the spiral head (i.e., the left side of the material inlet); the pitch of the long pitch blades is 0.3 to 0.35 blade diameters, and the long pitch blades are provided with material lifting paddles every 3 to 4 pitches;

[0020] The double-headed blades and reverse spiral blades are closed and arranged on both sides of the upper discharge unit; the double-headed blades and the long pitch blades have 1 to 2 blade overlaps, which is used to reduce the gap of the lifted material flowing down, and extend the material side length for material sealing.

[0021] The double-ended blades are arranged at the tail of the long pitch blades and are used to extrude and grind the high-temperature materials conveyed therefrom. The design of the double-ended blades can also cooperate with the upper discharging paddles to better lift the materials and achieve a better material sealing effect.

[0022] The short pitch blades are arranged on the left side of the material inlet to reduce the amount of high temperature material falling into the opposite side of the material running direction; the long pitch blades are arranged between the material inlet and the upper discharge unit. Through the pitch design of the long pitch blades, the high temperature material conveying rate with the best cooling effect can be adjusted.

[0023] The reverse spiral blade is arranged at the tail of the hollow conveying spiral. Through the arrangement of the reverse spiral blade, the high-temperature material conveyed from the material inlet can be pushed back. Under the joint action of the double-headed blade and the reverse spiral blade, the high-temperature material can be gathered to the middle, that is, gathered to the upward discharge unit position.

[0024] The upper discharging paddle is arranged between the double-headed blade and the reverse spiral blade, and is used to lift the cooled material conveyed in the hollow conveying screw and send it out through the upper discharging unit. The setting of the upper discharging paddle can remix the material with uneven temperature, thereby enhancing the cooling effect.

[0025] The long pitch blades are provided with material lifting paddles. During the conveying process, the high temperature material passes through the material lifting paddles, which can improve the material plane of the high temperature material in the upper discharge sealing and enhanced cooling spiral, and play a role in replacing the high temperature material with poor cooling effect in the middle of the material to the external surface, thereby improving the cooling efficiency of the high temperature material.

[0026] Preferably, the long pitch blade has circumferential openings, the diameter of the holes is 1 / 9 of the diameter of the long pitch blade, and the number of the holes is 6 to 8. The circumferential openings are used for the flow of nitrogen entering the nitrogen inlet, thereby improving the efficiency of nitrogen replacement.

[0027] In order to achieve the upper discharge sealing effect, the upper discharge unit further includes an upper discharge pipeline fixed to the upper end of the cooling cylinder, and the upper discharge pipeline reaches the discharge port after passing through the material baffle. The height of the material baffle is adjusted by the baffle adjusting screw, thereby adjusting the height of the material sealing plane; the upper discharge pipeline is also provided with an observation port and an upper discharge port temperature measuring point.

[0028] The material baffle is used to control the height of the material plane. By controlling the different heights of the material baffle, the height line of the material plane can be controlled to change differently, and the material baffle can be fixed by tightening the baffle adjustment screw. The observation port is used to observe the material plane and facilitate the adjustment of the material baffle and the baffle adjustment screw. The discharge port is used to discharge the material plane line that exceeds the material baffle control.

[0029] Furthermore, the cooling cylinder is provided with a lower slag discharge pipeline at a position corresponding to the upper discharge pipeline, and a slag discharge port and a star-shaped discharge valve are provided at the lower end of the lower slag discharge pipeline. The slag discharge is controlled by starting and stopping the star-shaped discharge valve, and the sealing inside the cooling cylinder is ensured. The installation of the star-shaped discharge valve improves the automation level, and the large pieces of material accumulated in the cooling cylinder can be discharged by the remotely activated star-shaped discharge valve.

[0030] In order to avoid leakage of dangerous waste gas carried by high-temperature materials, preferably, the cooling cylinder is provided with a sealing unit, which includes a front material side sealing component arranged at the feeding end of the cooling cylinder and a rear material side sealing component arranged at the discharging end of the cooling cylinder; the front material side sealing component and the rear material side sealing component both adopt a graphite packing sealing structure, including a packing seat, packing and a packing gland. The six circles of graphite packing can achieve a better sealing effect.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention strengthens the cooling of high-temperature materials through simultaneous internal and external cooling, thereby improving the cooling efficiency of the materials; different flow directions of cooling water can be set according to the heat exchange requirements to improve the cooling effect of high-temperature materials; the material lifting paddles provided on the hollow conveying screw can be used to lift the materials to increase the contact area with the cooling cylinder and increase the heat exchange efficiency; at the same time, the stirring of the paddles can promote the mixing of the materials to strengthen the heat exchange, and the high-temperature materials that originally could not contact the wall surface can be replaced next to the cooling wall surface; by arranging double-headed blades on the path where the materials are transported forward, the high-temperature materials are squeezed, ground and rubbed against the cooling cylinder, the hollow conveying screw and the spiral blades thereon during the conveying process, thereby accelerating the cooling; by arranging the upper discharging paddles, the material plane is raised to achieve the purpose of upper discharging and forming a material seal.

[0033] 2. The device of the present invention has the advantages of high cooling efficiency, short residence time, excellent cooling product quality, compact equipment, low investment cost, and long operation cycle. The idea of ​​upper discharge sealing is creatively proposed. By setting the upper discharge module, the material accumulation is passed through, and the material itself plays a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall schematic diagram of a top discharge sealing and enhanced cooling spiral conveying device of the present invention;

[0035] Figure 2 Schematic diagram of a hollow conveying spiral in an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of a cooling cylinder and a sealing unit in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of an upper discharging unit in an embodiment of the present invention;

[0038] Figure 5 The plane diagram of different material seals caused by spiral rotation is taken at the observation port of the upper discharge unit without double-headed blades;

[0039] Figure 6 The material sealing plane is photographed from the observation port of the upper discharge unit with double-ended blades. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described below in conjunction with the embodiments and the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "include" or "comprise" and the like used in the present invention mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] like Figures 1 to 4As shown, an upper discharge sealed and enhanced cooling screw conveying device includes a material inlet 1, a hollow conveying screw 2, a cooling cylinder 3, a nitrogen inlet 4, an upper discharge unit, a lower slag discharge pipeline, a cooling water inlet, a cooling water outlet, a power unit, a sealing unit 10 and a saddle support.

[0043] The material inlet 1 in this embodiment is communicated with the interior of the cooling cylinder 3 and is used for the entry of high-temperature materials.

[0044] like Figure 2 As shown, the hollow conveying screw 2 in this embodiment is arranged axially along the cooling cylinder 3, the central axis 201 of the hollow conveying screw 2 is a hollow axis, and the conveying spiral pieces installed on the central axis 201 are short pitch blades 207, long pitch blades 202, double-headed blades 203, upper material discharging paddles 204, and reverse spiral blades 205 in sequence, and material lifting paddles 206 are arranged between the long pitch blades 202. The material plane 208 is caused by the special arrangement of the long pitch blades 202, and it reaches the highest position at the double-headed blades 203, and forms a material seal there.

[0045] like Figure 3 As shown, the cooling cylinder 3 in this embodiment includes a shell 301 and guide blades 302. The cooling cylinder 3 is coaxial with the long pitch blades 202 and is used to pass the outer cooling water. Through the design of the guide blades 302, the cooling water rotates around the shell 301 to achieve a better cooling effect.

[0046] The nitrogen inlet 4 in this embodiment is used for the entry of nitrogen. The entered nitrogen is used to displace the dangerous gas in the gaps between the materials, isolating the dangerous gas from being discharged with the materials. The nitrogen inlet is arranged on the left side of the double-headed blade 203. When the double-headed blade 203 is in effect, it can also better guide the flow direction of the nitrogen.

[0047] like Figure 4 As shown, the upper discharge unit of this embodiment includes a material baffle 501, a baffle adjustment screw 502, an observation port 503, a discharge port 505, and an upper discharge port temperature measuring point 506, wherein the material plane 504 is caused by adjusting the height of different material baffles 501. The upper discharge unit is used to discharge the cooled material in the cooling cylinder 3.

[0048] In this embodiment, under the cooperation of the double-headed blade 203, the upper discharging paddle 204, the reverse spiral blade 205 and the upper discharging unit, the material plane of the upper discharging can be made as follows: Figure 6As shown, the double-ended blade 203 is used to raise the material height between the cooling cylinder 3 and the double-ended blade 203, as shown in the material plane 208. Due to the design of the double-ended blade 203, when the high-temperature material is transported to this position, the material conveying volume of the hollow conveying screw remains unchanged, and the space of the double-ended blade 203 becomes smaller, squeezing and raising the material. In the absence of the double-ended blade, the following will occur Figure 5 The material plane periodically collapses as shown. After adding the double-ended blades, the collapse period of the material plane will be shortened and the collapse amount will be reduced due to the shortened relative pitch. By changing the height of the material baffle 501 in the upper discharge unit and increasing the amount of material stored in the upper discharge unit, the collapse caused by the rotation of the hollow conveying screw can be ignored, and the material plane is finally displayed as follows: Figure 6 The status shown will not appear Figure 5 Similarly, the sealing plane collapses due to the spiral rotation, causing the sealing plane to fail and leak.

[0049] The lower slag discharge pipeline of this embodiment includes a slag discharge port 601 and a star-shaped discharge valve 602, wherein the space above the slag discharge port 601 is used to store the screened large pieces of material, and the star-shaped discharge valve 602 is used to discharge the large pieces of material accumulated at the end of the cooling cylinder. The star-shaped discharge valve 602 can be remotely controlled, thereby improving the level of automation.

[0050] The cooling water inlet of this embodiment includes a central axis cooling water inlet 701 and a cylinder cooling water inlet 702, which are used to input cooling water so that the cooling water enters the cooling cylinder 3 and the central axis 201. A cooling water inlet temperature measuring point 703 is provided on the cooling water to monitor the temperature of the input cooling water. The central axis cooling water inlet 701 and the cylinder cooling water inlet 702 come from the same cooling water inlet main pipe.

[0051] The cooling water outlet of this embodiment includes a cylinder cooling water outlet 802 and a central axis cooling water outlet 801, a cylinder cooling water regulating valve 803 and a cylinder cooling water outlet temperature measuring point 804 are installed on the cylinder cooling water outlet 802, and a central axis cooling water regulating valve 805 and a central axis cooling water outlet temperature measuring point 806 are installed on the central axis cooling water outlet 801. The cylinder cooling water outlet 802 and the central axis cooling water outlet 801 are connected to the same cooling water outlet mother pipe.

[0052] In this embodiment, the cooling water flow direction of the central axis is opposite to the material flow direction, and the cooling water flow direction of the cylinder is the same as the material flow direction, so that the high-temperature material has a better cooling effect when it contacts the cooling cylinder 3, and when the high-temperature material is transported to the upper discharge unit, the upper discharge paddle 204 is used to shift the position of the material with different internal and external cooling effects, so that it can exchange heat with the central axis, and because the cooling water at the corresponding position of the discharge port 505 has just entered the cooling water inlet 701 of the central axis, it can play a better role in reducing the discharge temperature, and through the setting of the material baffle 501, the residence time of the high-temperature material in the cooling cylinder 3 is increased, and the heat exchange is strengthened. It also has a better cooling effect.

[0053] The power unit of this embodiment includes a driving end 902 and a driven end 901 , and is used to drive the central shaft 201 to rotate and transport materials, wherein the driving end 902 includes a gear 9021 , a thrust bearing 9022 and a bearing 9023 .

[0054] The sealing unit 10 of this embodiment includes a front sealing assembly at the active end of the cooling cylinder and a rear sealing assembly arranged at the driven end of the cooling cylinder, the front sealing assembly includes a packing seat 1001, packing 1002 and a packing gland 1003, and the rear sealing assembly includes a packing seat 1004, packing 1005 and a packing gland 1006. The six circles of graphite packing are arranged to achieve a good sealing effect, which is used to isolate the internal dangerous gas from leaking out.

[0055] The saddle support of this embodiment includes a fixed support 1101 and an adjustable support 1102, which are used to fix the screw conveyor and play a supporting role. Among them, the fixed support 1101 is fixed to the on-site base and its position cannot be adjusted. The adjustable base 1102 is loosely connected to the on-site base to provide a displacement direction when the upper discharge seal reinforcement screw conveyor is deformed due to heat.

[0056] The measuring units of this embodiment are distributed throughout the upper discharge sealed enhanced cooling spiral conveyor device. The measuring units include a cooling water inlet temperature measuring point 702, a cylinder cooling water outlet temperature measuring point 804, a central axis cooling water outlet temperature measuring point 805, and an upper discharge port temperature measuring point 506. By setting multiple temperature measuring points on the equipment, real-time monitoring of various operating parameters is achieved, and the best cooling effect is achieved by relying on control logic.

[0057] The embodiments described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A top discharge sealing and enhanced cooling spiral conveying device, characterized in that: include: The cooling cylinder is used for cooling water outside, including the shell and guide vanes; The hollow conveying screw is coaxially arranged inside the cooling cylinder. The central axis of the hollow conveying screw is a hollow shaft for conveying internal cooling water. Short-pitch blades, long-pitch blades, double-headed blades, upper discharging paddles, and reverse spiral blades are arranged on the central axis from the head to the tail of the screw. Material lifting paddles are arranged between some long-pitch blades. A power unit is arranged at both ends of the cooling cylinder, including a driving end and a driven end, and is used to drive the rotation of the hollow conveying screw to transport materials; The material inlet is arranged at the feeding end of the cooling cylinder and communicates with the interior of the cooling cylinder for the entry of high-temperature materials; The upper discharge unit is arranged at the discharge end of the cooling cylinder, corresponding to the position of the upper discharge paddle, and is used to discharge the cooled material in the cooling cylinder upward and form a material seal.

2. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1 is characterized in that: The cooling cylinder is provided with a nitrogen inlet for replacing dangerous gases in the gap between materials.

3. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1 is characterized in that: The cooling cylinder is provided with a cylinder cooling water inlet and a cylinder cooling water outlet near both ends, and the two ends of the hollow conveying screw are provided with a central axis cooling water inlet and a central axis cooling water outlet.

4. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 3 is characterized in that: The cylinder cooling water inlet and the central shaft cooling water inlet are connected to the same cooling water mother pipe and are provided with a cooling water inlet temperature measuring point; the cylinder cooling water outlet and the central shaft cooling water outlet are both provided with a cooling water regulating valve and a cooling water outlet temperature measuring point.

5. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 3 is characterized in that: The cooling water flow direction of the central axis is opposite to the direction of the material, and the cooling water flow direction of the cooling cylinder is the same as the direction of the material.

6. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1 is characterized in that: The short pitch blades and long pitch blades are respectively arranged on both sides of the material inlet, the pitch of the short pitch blade is 0.2 to 0.25 blade diameters, and is used to limit the natural flow of materials into the spiral head; the pitch of the long pitch blade is 0.3 to 0.35 blade diameters, and a material lifting paddle is arranged on the long pitch blade every 3 to 4 pitches; The double-headed blades and reverse spiral blades are closed and arranged on both sides of the upper discharge unit; the double-headed blades and the long pitch blades have 1 to 2 blade overlaps, which is used to reduce the gap of the lifted material flowing down, and extend the material side length for material sealing.

7. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1 is characterized in that: The long pitch blade has circumferential openings, the diameter of the holes is 1 / 9 of the diameter of the long pitch blade, and the number of the holes is 6 to 8.

8. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1 is characterized in that: The upper discharge unit includes an upper discharge pipeline fixed to the upper end of the cooling cylinder. The upper discharge pipeline reaches the discharge port after passing through the material baffle. The height of the material baffle is adjusted by the baffle adjusting screw, thereby adjusting the height of the material sealing plane. The upper discharge pipeline is also provided with an observation port and an upper discharge port temperature measuring point.

9. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 8, characterized in that: The cooling cylinder is provided with a lower slag discharge pipeline at a position corresponding to the upper discharge pipeline. The lower end of the lower slag discharge pipeline is provided with a slag discharge port and a star-shaped discharge valve. The slag discharge is controlled by starting and stopping the star-shaped discharge valve, and the sealing inside the cooling cylinder is ensured.

10. The upper discharge sealing and enhanced cooling spiral conveying device according to claim 1, characterized in that: The cooling cylinder is provided with a sealing unit, which includes a front material side sealing component arranged at the feeding end of the cooling cylinder and a rear material side sealing component arranged at the discharging end of the cooling cylinder; the front material side sealing component and the rear material side sealing component both adopt a graphite packing sealing structure.

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