Oil sludge and ash conveying device

Abstract

An oil sludge ash conveying device comprises a double-shaft blade water-cooled screw conveyor, a single-shaft water-cooled screw conveyor and cooling water circulation equipment, and is characterized in that the double-shaft blade water-cooled screw conveyor and the single-shaft water-cooled screw conveyor are used for two-section cooling, and the cooling water circulation equipment is used for cooling the ash indirectly. The high-temperature oil sludge ash is scattered, scraped to be thin and then extruded and mixed, the situation that the cooling efficiency is reduced due to ash clustering is avoided, the interior and the exterior of the ash are fully cooled, on one hand, the temperature of the ash can be reduced, on the other hand, water does not make contact with the ash, dry ash is still conveyed in the cavity, and the disposal cost of the next procedure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature oily sludge ash treatment, in particular to an oily sludge ash conveying device. Background Art

[0002] When transporting high-temperature oil sludge ash, it is not only necessary to meet the sealing requirements of upstream and downstream equipment to prevent external gas from entering the cavity of the transportation equipment and causing unstable working conditions of the pyrolysis furnace, but also to meet the requirements of low ash temperature at the terminal discharge port to meet the requirements of room temperature storage. The selection of equipment has high requirements. In addition, due to the fine particle size and lower density of high-temperature oil sludge ash than water, if water quenching is adopted for cooling, the ash is easy to float on the water surface, which is not conducive to transportation and the ash temperature cooling effect is not good.

[0003] At present, the commonly used transportation method is to inject a certain amount of water into the dry ash, so that the injected water is stirred and mixed with the ash, and then the cooling water and the ash are completely melted together, so as to reduce the temperature of the ash and achieve the storage, transportation and disposal conditions of the ash; but this method increases the moisture content of the sludge ash on the one hand, and increases the disposal cost of the ash back-end process on the other hand.

[0004] For example, most of the existing ash transportation uses scraper conveyor + bucket elevator + double-axis humidifier, or water-sealed scraper. The problem with this system is that the ash is directly mixed with water. On the one hand, the mixing of water and ash increases the humidity of the ash, ensuring that the ash will not raise dust. On the other hand, it reduces the high-temperature ash to room temperature, making it easy to store and transport. However, this device increases the difficulty and corresponding cost of later ash disposal, and the water integrated in the ash needs to be removed during the subsequent process.

[0005] In view of the above problems, it is necessary to design targeted transportation equipment for high-temperature oil sludge ash to achieve efficient cooling of the oil sludge ash during transportation to meet the needs of relatively low-temperature storage, and to prevent the oil sludge ash from coming into contact with water and from contacting external gases during transportation. Utility Model Content

[0006] In order to solve the deficiencies of the above-mentioned technology, the utility model provides an oil sludge ash conveying device.

[0007] The technical solution of the utility model: an oil sludge ash conveying device, comprising a double-axis blade water-cooled screw conveyor, a single-axis water-cooled screw conveyor, and a cooling water circulation device, the double-axis blade water-cooled screw conveyor is provided with a first feed port and a first discharge port, the single-axis water-cooled screw conveyor comprises a second feed port and a second discharge port, the first discharge port is sealed and connected with the second feed port, the first feed port and the second discharge port are respectively sealed and connected with upstream and downstream equipment, the double-axis blade water-cooled screw conveyor and the single-axis water-cooled screw conveyor are both provided with a casing and a rotating shaft, the casing is both provided with an inner wall of a water jacket, the rotating shaft is both provided with a hollow water-cooling cavity structure, the cooling water circulation device is connected with the inner wall of the water jacket and the hollow water-cooling cavity of the rotating shaft, and drives the cooling water to flow through a circulating heat exchange.

[0008] By adopting the above technical solution, the present application adopts two-stage cooling. In the first stage of cooling, the solution adopted is that the high-temperature oil sludge slag falls into a double-shaft blade water-cooled screw conveyor, and is fully staggered and scattered by a pair of blade stirring shafts, so that the slag presents a thin layer. The thickness of the slag can be controlled by the axial gap between adjacent stirring blades. The thin layer of slag avoids the problem of internal temperature being difficult to conduct cooling caused by the agglomeration structure. The radial outer side of the slag is fitted with the water-cooling jacket of the first casing. At the same time, the center of the rotating shaft for conveying the slag also adopts a hollow water-cooling room structure, and the radial inner side of the slag can fit with the rotating shaft for heat conduction; this structural design improves the cooling efficiency of the high-temperature slag;

[0009] The second stage of cooling adopts a single-axis water-cooled screw conveyor. The cooled ash is dispersed by a double-axis blade water-cooled screw conveyor and then enters a single-axis water-cooled screw conveyor. The spiral blades of the second rotating shaft squeeze and mix the dispersed ash. The ash is squeezed, and the internal ash is turned outward, and the inside and outside are fully mixed to dissipate the heat. The jacket water cooling of the second shell and the hollow water-cooling structure in the center of the second rotating shaft are used to further cool the sludge ash. This invention technology not only reduces the temperature of the high-temperature sludge ash to a very low level, but also does not increase the water content of the ash, almost maintaining the water content at high temperature, and also saves the cost of ash rear-end disposal.

[0010] The utility model is further configured as follows: the double-shaft blade water-cooled screw conveyor comprises a first housing, a pair of blade stirring shafts, and a first driving mechanism; the pair of blade stirring shafts are arranged in parallel in the first housing for rotational connection; the pair of blade stirring shafts each comprises a first rotating shaft, and a plurality of stirring blades arranged axially along the first rotating shaft; the stirring blades of the pair of blade stirring shafts are arranged axially staggered, and the axial gap between adjacent stirring blades is a scraping gap for controlling the axial thickness of the ash;

[0011] A first hollow water-cooling cavity is disposed at the center of the first rotating shaft, and an inner wall of a first water-cooling jacket is disposed on the inner wall of the first housing;

[0012] The first driving mechanism cooperates with a pair of blade stirring shafts to drive the pair of blade stirring shafts to rotate; the first housing is sealed, and a first feed port and a first discharge port are respectively provided on both sides of the rotation and conveying direction of the blade stirring shafts.

[0013] The utility model is further configured as follows: the cross-section of the first casing and the first water-cooling jacket is a "W"-shaped structure adapted to the contour of a pair of blade stirring shafts, the "W"-shaped structure includes two grooves for respectively accommodating a pair of blade stirring shafts, and a protrusion extending toward the midpoint of the pair of blade stirring shafts, the protrusion guiding the ash to move toward the direction of the two grooves.

[0014] With the above technical solution, when a pair of blade stirring shafts are set in a double-shaft blade water-cooled screw conveyor, a gap will appear vertically below the midpoint between the pair of blade stirring shafts. In conventional settings, the stirring blades in this gap are restricted by the radius, making it difficult to handle the sludge in the gap, and the material will only be directly discharged by the subsequent sludge. Under the design of this application, a "W"-shaped structure is designed to set a protrusion in the gap. Due to the lifting of the protrusion, it is difficult for ash to accumulate there, and it will slide along the protrusion to the grooves on both sides and enter the range that the stirring blades can handle, avoiding the ash from escaping the net and improving the overall cooling effect and conveying capacity.

[0015] The utility model is further configured as follows: a plurality of heat-conducting shafts connected to the stirring blades are arranged on the outer peripheral surface of the first rotating shaft, and the heat-conducting shafts pass through the first hollow water-cooling cavity of the first rotating shaft to exchange heat with the cooling water.

[0016] By adopting the above technical solution, the cooling water in the rotating shaft is connected to the stirring blades through the heat-conducting shaft to exchange heat, thereby cooling the stirring blade temperature, and then cooling is performed by the contact between each stirring blade and the ash.

[0017] Further configuration of the utility model: the single-axis water-cooled screw conveyor includes a second casing, a second rotating shaft, and a second driving mechanism. The second rotating shaft is arranged on the second casing and can be rotatably connected. The outer circumference of the second rotating shaft is provided with spiral blades, and the second rotating shaft is provided with a second hollow water-cooling cavity. The second driving mechanism cooperates with the second rotating shaft to drive it to rotate and convey ash. The second casing is sealed, and a second feed port and a second discharge port are respectively provided on both sides of the conveying direction of the second rotating shaft. The inner wall of the second casing is provided with a second water-cooling jacket.

[0018] A further configuration of the utility model is as follows: the cross section of the second casing and the second water-cooling jacket is a "U"-shaped structure adapted to the spiral blades.

[0019] Beneficial effects of the utility model: the application designs a set of indirect cooling ash conveying device, which is cooled by a double-axis blade water-cooled screw conveyor + a single-axis water-cooled screw conveyor in two stages. The high-temperature oil sludge ash is broken up, scraped thin, and then squeezed and mixed to avoid ash clumping and reducing cooling efficiency, so that the ash inside and outside can be fully dissipated and cooled. On the one hand, the system device can reduce the temperature of the ash, and on the other hand, the water does not contact the ash, and the ash is still transported in the cavity, which reduces the disposal cost of the subsequent process.

[0020] Moreover, the W-type water-cooling jacket and the U-type water-cooling jacket have a baffle structure inside the cavity, which prolongs the movement and residence time of the cooling water in the jacket. With the inclined setting of the casing, the cooling water enters from the lower end and flows out from the higher end, ensuring that the cooling water fills the cavity inside the shaft, and also prolongs the flow time of the cooling water in the jacket. The material enters the cavity from the lower end of the casing, and slowly climbs upward driven by the blades, prolonging the residence time of the material in the spiral cavity, making the material temperature drop faster. At the same time, energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the embodiment of the utility model Figure 1 ;

[0022] Figure 2 for Figure 1 Sectional view at AA;

[0023] Figure 3 for Figure 1 Cross-sectional view at BB in the middle.

[0024] The numbers in the accompanying drawings are: 1-double-axis blade water-cooled screw conveyor, 11-first feed port, 12-first discharge port, 13-first casing, 131-first water-cooling jacket, 132-groove, 133-protrusion, 14-blade stirring shaft, 141-first rotating shaft, 142-stirring blade, 143-scraping gap, 144-heat-conducting shaft, 141-A-first hollow water-cooling cavity, 15-first driving mechanism, 2-single-axis water-cooled screw conveyor, 21-second feed port, 22-second discharge port, 23-second casing, 24-second rotating shaft, 25-second driving mechanism, 241-spiral blade, 24-B-second hollow water-cooling cavity, 231-second water-cooling jacket.

[0025] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0026] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0027] The following is a detailed description of the utility model inlet line in conjunction with the accompanying drawings. Figure 1-3 As shown, an oil sludge ash conveying device includes a double-axis blade water-cooled screw conveyor 1, a single-axis water-cooled screw conveyor 2, and a cooling water circulation device, wherein the double-axis blade water-cooled screw conveyor 1 is provided with a first feed port 11 and a first discharge port 12, and the single-axis water-cooled screw conveyor 2 includes a second feed port 21 and a second discharge port 22, the first discharge port 12 is sealed and connected with the second feed port 21, and the first feed port 11 and the second discharge port 22 are sealed and connected with upstream and downstream equipment respectively, the double-axis blade water-cooled screw conveyor 1 and the single-axis water-cooled screw conveyor 2 are both provided with a casing and a rotating shaft, the casing is both provided with an inner wall of a water jacket, the rotating shaft is both provided with a hollow water-cooling cavity structure, the cooling water circulation device is connected with the inner wall of the water jacket and the hollow water-cooling cavity of the rotating shaft, and drives the cooling water to flow through a circulating heat exchange.

[0028] The present application adopts two-stage cooling. In the first stage of cooling, the scheme adopted is that the high-temperature oil sludge slag falls into the double-shaft blade water-cooled screw conveyor 1, and is fully staggered and scattered by a pair of blade stirring shafts 14, so that the slag presents a thin layer. The thickness of the slag can be controlled by the axial gap between adjacent stirring blades 142. The thin layer of slag avoids the problem of internal temperature being difficult to conduct and cool caused by the agglomeration structure. The radial outer side of the slag is fitted with the water-cooling jacket of the first housing 13. At the same time, the center of the rotating shaft for conveying the slag also adopts a hollow water-cooling room structure, and the radial inner side of the slag can fit with the rotating shaft for heat conduction; this structural design improves the cooling efficiency of the high-temperature slag;

[0029] The second stage of cooling adopts a single-axis water-cooled screw conveyor 2. The cooled ash is dispersed by the double-axis blade water-cooled screw conveyor 1 and then enters the single-axis water-cooled screw conveyor 2. The spiral blades 241 of the second rotating shaft 24 squeeze and mix the dispersed ash. The ash is squeezed, and the internal ash is turned outward, and the inside and outside are fully mixed to dissipate the heat. The jacket water cooling of the second shell and the hollow water-cooling structure in the center of the second rotating shaft 24 are used to further cool the sludge ash. This invention technology not only reduces the temperature of the high-temperature sludge ash to a very low level, but also does not increase the water content of the ash, and almost maintains the water content at the high temperature state, while also saving the cost of the ash rear-end disposal.

[0030] The double-shaft blade water-cooled screw conveyor 1 comprises a first housing 13, a pair of blade stirring shafts 14, and a first driving mechanism 15. The pair of blade stirring shafts 14 are parallelly arranged in the first housing 13 for rotational connection. The pair of blade stirring shafts 14 each comprise a first rotating shaft 141, and a plurality of stirring blades 142 axially arranged along the first rotating shaft 141. The stirring blades 142 of the pair of blade stirring shafts 14 are axially staggered, and the axial gap between adjacent stirring blades 142 is a scraping gap 143 for controlling the axial thickness of the ash.

[0031] A first hollow water-cooling cavity 141-A is disposed at the center of the first rotating shaft 141, and an inner wall of the first housing 13 is disposed on an inner wall of a first water-cooling jacket 131;

[0032] The first driving mechanism 15 cooperates with a pair of blade stirring shafts 14 to drive the pair of blade stirring shafts 14 to rotate; the first housing 13 is sealed, and a first feed port 11 and a first discharge port 12 are respectively provided on both sides of the rotation and conveying direction of the blade stirring shaft 14.

[0033] The cross-section of the first casing 13 and the first water-cooling jacket 131 is a "W"-shaped structure adapted to the contour of a pair of blade stirring shafts 14. The "W"-shaped structure includes two grooves 132 for accommodating a pair of blade stirring shafts 14 respectively, and a protrusion 133 extending toward the midpoint of the pair of blade stirring shafts 14. The protrusion 133 guides the ash to move toward the two grooves 132.

[0034] When the double-shaft blade water-cooled screw conveyor 1 is provided with a pair of blade stirring shafts 14, a gap will appear vertically below the midpoint between the pair of blade stirring shafts 14. In conventional settings, the stirring blades 142 in the gap are restricted by the radius, making it difficult to handle the sludge in the gap, and the material will only be directly discharged by the subsequent sludge. Under the design of this application, a protrusion 133 is provided in the gap through a "W"-shaped structural design. Due to the lifting of the protrusion 133, the ash is difficult to accumulate there, and it will slide along the protrusion 133 to the grooves 132 on both sides, and enter the processing range of the stirring blades 142, thereby avoiding the ash from escaping the net and improving the overall cooling effect.

[0035] The outer peripheral surface of the first rotating shaft 141 is provided with a plurality of heat-conducting shafts 144 connected to the stirring blades 142 . The heat-conducting shafts pass through the first hollow water-cooling cavity 141 -A of the first rotating shaft 141 to exchange heat with the cooling water.

[0036] The cooling water in the rotating shaft is connected to the stirring blades 142 through the heat-conducting shaft 144 for heat exchange, thereby cooling the temperature of the stirring blades 142, and then cooling is performed by the contact between each stirring blade 142 and the ash.

[0037] The single-axis water-cooled screw conveyor 2 includes a second casing 23, a second rotating shaft 24, and a second driving mechanism 25. The second rotating shaft 24 is arranged on the second casing 23 and can be rotatably connected. The outer peripheral surface of the second rotating shaft 24 is provided with spiral blades 241, and the second rotating shaft 24 is provided with a second hollow water-cooling chamber 24-B. The second driving mechanism 25 cooperates with the second rotating shaft 24 to drive it to rotate and transport ash. The second casing 23 is sealed, and a second feed port 21 and a second discharge port 22 are respectively provided on both sides of the conveying direction of the second rotating shaft 24. The inner wall of the second casing 23 is provided with a second water-cooling jacket 231.

[0038] The drive mechanism is conventionally configured in the prior art, as shown in the attached manual. Figure 1 The transmission shown is carried out using a motor, a reducer, a gear set and other components. This is a conventional design and will not be repeated.

[0039] The cross-section of the second housing 23 and the second water-cooling jacket 231 is a “U”-shaped structure adapted to the spiral blades 241 .

[0040] The present application designs a set of indirect cooling ash conveying device, a double-axis blade water-cooled screw conveyor 1 + a single-axis water-cooled screw conveyor 2 two-stage cooling, by breaking up the high-temperature oil sludge ash, scraping it thin, and then squeezing and mixing it, to avoid the ash clumping and reducing the cooling efficiency, so that the ash inside and outside can be fully dissipated and cooled. On the one hand, the system device can reduce the temperature of the ash, and on the other hand, the water does not contact the ash, and the ash is still transported in the cavity, which reduces the disposal cost of the subsequent process.

[0041] Moreover, the W-type water-cooling jacket and the U-type water-cooling jacket have a baffle structure inside the cavity, which prolongs the movement and residence time of the cooling water in the jacket. With the inclined setting of the casing, the cooling water enters from the lower end and flows out from the higher end, ensuring that the cooling water fills the cavity inside the shaft, and also prolongs the flow time of the cooling water in the jacket. The material enters the cavity from the lower end of the casing, and slowly climbs upward driven by the blades, prolonging the residence time of the material in the spiral cavity, so that the material temperature drops faster. It achieves the reduction of energy consumption at the same time.

[0042] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. An oil sludge ash conveying device, characterized in that: It includes a double-axis blade water-cooled screw conveyor, a single-axis water-cooled screw conveyor, and a cooling water circulation device. The double-axis blade water-cooled screw conveyor is provided with a first feed port and a first discharge port. The single-axis water-cooled screw conveyor includes a second feed port and a second discharge port. The first discharge port is sealed and connected with the second feed port. The first feed port and the second discharge port are sealed and connected with upstream and downstream equipment respectively. The double-axis blade water-cooled screw conveyor and the single-axis water-cooled screw conveyor are both provided with a casing and a rotating shaft. The casing is both provided with an inner wall of a water jacket. The rotating shaft is both provided with a hollow water-cooling cavity structure. The cooling water circulation device is connected with the inner wall of the water jacket and the hollow water-cooling cavity of the rotating shaft to drive the cooling water to flow through a circulating heat exchange.

2. The oil sludge ash conveying device according to claim 1, characterized in that: The double-shaft blade water-cooled screw conveyor comprises a first housing, a pair of blade stirring shafts, and a first driving mechanism. The pair of blade stirring shafts are arranged in parallel in the first housing for rotational connection. The pair of blade stirring shafts each comprises a first rotating shaft and a plurality of stirring blades arranged axially along the first rotating shaft. The stirring blades of the pair of blade stirring shafts are arranged axially staggered, and the axial gap between adjacent stirring blades is a scraping gap for controlling the axial thickness of ash. A first hollow water-cooling cavity is arranged at the center of the first rotating shaft, and an inner wall of a first water-cooling jacket is arranged on the inner wall of the first housing. The first driving mechanism cooperates with a pair of blade stirring shafts to drive the pair of blade stirring shafts to rotate; the first housing is sealed, and a first feed port and a first discharge port are respectively provided on both sides of the rotation and conveying direction of the blade stirring shafts.

3. The oil sludge ash conveying device according to claim 2, characterized in that: The cross-section of the first casing and the first water-cooling jacket is a "W"-shaped structure adapted to the contour of a pair of blade stirring shafts. The "W"-shaped structure includes two grooves for accommodating a pair of blade stirring shafts respectively, and a protrusion extending toward the midpoint of the pair of blade stirring shafts, and the protrusion guides the ash to move toward the two grooves.

4. The oil sludge ash conveying device according to claim 3, characterized in that: The outer peripheral surface of the first rotating shaft is provided with a plurality of heat-conducting shaft rods connected with the stirring blades. The heat-conducting shaft rods pass through the first hollow water-cooling cavity of the first rotating shaft to exchange heat with the cooling water.

5. The oil sludge ash conveying device according to any one of claims 2 to 4, characterized in that: The single-axis water-cooled screw conveyor includes a second casing, a second rotating shaft, and a second driving mechanism. The second rotating shaft is arranged on the second casing and can be rotatably connected. The outer circumference of the second rotating shaft is provided with spiral blades, and the second rotating shaft is provided with a second hollow water-cooling cavity. The second driving mechanism cooperates with the second rotating shaft to drive it to rotate and transport ash. The second casing is sealed and a second feed port and a second discharge port are respectively provided on both sides of the conveying direction of the second rotating shaft. The inner wall of the second casing is provided with a second water-cooling jacket.

6. The oil sludge ash conveying device according to claim 5, characterized in that: The cross-section of the second casing and the second water-cooling jacket is a "U"-shaped structure adapted to the spiral blades.

7. The oil sludge ash conveying device according to claim 6, characterized in that: The first housing and the second housing are both arranged to be inclined such that the vertical height of the feed port side is lower than the vertical height of the discharge port side.

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