Helical ribbon type pre-liming barrel

Abstract

The invention provides a helical ribbon type pre-liming barrel which comprises a barrel body and a stirring device which is arranged in the barrel body and is used for mixing mother liquor and lime milk, the stirring device comprises a speed reducing motor fixed at the top of the barrel body, a transmission shaft connected with the output end of the speed reducing motor and extending into the barrel body, a plurality of helical ribbon fixing seats fixed on the transmission shaft, a plurality of helical ribbons detachably connected with the helical ribbon fixing seats, and a dispersing disc fixed at the bottom end of the transmission shaft; the barrel body is provided with a mother liquor inlet for mother liquor to enter, a lime milk inlet for lime milk to enter and a sand liquor outlet for outputting mixed liquor formed by mixing the mother liquor and the lime milk. According to the helical ribbon type pre-liming barrel, preheated mother liquor and lime milk are fully mixed through the helical ribbon stirring devices which are arranged in a staggered mode and the dispersing disc with the open bottom, the attachment surface is small, binders are not prone to being generated, and the helical ribbon type pre-liming barrel has excellent stirring performance.

Description

Technical Field

[0001] The invention belongs to the field of alkali production by ammonia-soda process, and particularly relates to a screw-belt type pre-ash barrel. Background Art

[0002] In the ammonia-soda process, the main function of the pre-ash barrel is to fully mix and react the preheated mother liquor (mainly ammonium chloride) in the distillation tower with lime milk, so that the bound ammonium in it becomes free ammonia, and then it is sent back to the distillation tower to distill out the free ammonia. It can be seen that the stable operation of the pre-ash barrel is a key device to ensure the working efficiency of the distillation tower.

[0003] However, due to its special working environment (1. In the pre-ash barrel, the calcium ions in the lime milk easily combine with other anions to form scars in the barrel, affecting the mixing efficiency. 2. The lime milk contains sand impurities. At the same time, in order to prevent the pre-ash barrel from vibrating, the speed of the stirring shaft cannot be too fast, which causes some sand to not be discharged in time with the blending liquid, causing siltation at the bottom of the barrel and blocking the liquid outlet.) This results in the traditional pre-ash barrel having low mixing intensity, short operating cycle, and difficult cleaning and maintenance, which affects the subsequent process.

[0004] CN212632681U discloses a pre-ash barrel stirring device, which includes a barrel body and a stirring mechanism arranged in the barrel body, the stirring mechanism includes a driving device, a paddle stirrer and a frame stirrer arranged below the paddle stirrer, the paddle stirrer includes a stirring shaft and a plurality of paddles, the plurality of paddles are arranged on the stirring shaft along the axial direction of the stirring shaft. The pre-ash barrel stirring device is essentially a combination of a paddle stirrer and a frame stirrer, has a large attachment surface to the mixed liquid, and is prone to stuttering.

[0005] CN205517370U discloses a stirring kettle, comprising a tank body, a stirring shaft, a stirring paddle and an auxiliary paddle, wherein the stirring paddle is fixed on the stirring shaft, and the stirring paddle is in a double helix shape with the stirring shaft as the center line, and the auxiliary paddle is fixed on the stirring shaft below the stirring paddle. Since the stirring paddle is fixedly connected to the stirring shaft and cannot be disassembled, the difficulty of maintenance and replacement is increased, and the auxiliary paddle arranged below the stirring paddle has a simple structure and cannot effectively stir the slurry at the bottom of the tank body, causing the discharge port to be blocked.

[0006] CN106984216A discloses a novel pre-ash barrel stirring device, comprising a barrel body, a stirring shaft axially inserted in the barrel body, and a stirring device arranged in the barrel body, wherein the stirring device comprises a paddle-type stirrer and a frame-type stirrer axially sleeved on the stirring shaft in the upper and lower directions, and a plurality of blocks arranged on the inner wall of the barrel body, wherein the paddle-type stirrer comprises a plurality of stirring paddles sleeved on the stirring shaft at intervals in the upper and lower directions, and the diameters of the upper and lower adjacent stirring paddles are different, and the blocks are arranged on the inner wall of the barrel body at positions corresponding to the paddle-type stirrer, and the frame-type stirrer comprises a stirring frame sleeved on the lower part of the stirring shaft. It is said that the stirring device has a good stirring effect, saves motor power, and has a high stirring intensity. However, the paddle-type and frame-type stirrers have large attachment surfaces and are prone to stuttering.

[0007] CN217042490U discloses an improved pre-ash barrel, including a fixing mechanism and a discharging mechanism, wherein the fixing mechanism includes a barrel body, a bracket, a stirring frame, a transmission rod, and a motor; a feed pipe is provided on the upper part of the barrel body, and a discharge pipe is provided on the lower part; two brackets are provided, which are fixed on the inner wall of the barrel body at intervals and located above the discharge pipe; the stirring frame is rotatably connected between the two brackets, one end of the transmission rod is transmission-connected to the output end of the motor fixed on the outer side of the top of the barrel body, and the other end is rotatably connected to the stirring frame; the discharging mechanism includes a feed plate, a piston, and an electric push rod, wherein the feed plate is fixed on the inner wall of the barrel body and located between the bracket and the discharge pipe at the bottom of the stirring frame, the feed plate is provided with a through hole, the piston is slidably connected to the inner wall of the barrel body and is arranged below the feed plate, the electric push rod is fixed inside the barrel body, and the output end of the electric push rod is fixed on the lower surface of the piston. It is said that the pre-ash barrel can precipitate the reaction solution to separate and discharge the internal sand, without causing bottom precipitation, and the separated solution is relatively pure. Similarly, the stirring frame has a large attachment surface and is prone to stuttering. Summary of the invention

[0008] In view of the problems existing in the prior art, the present invention provides a screw-ribbon type pre-ash barrel, which achieves sufficient mixing of the preheated mother liquor and the ash milk through staggered screw-ribbon stirring devices and a bottom-opening dispersion disk. It has a small adhesion surface and is not prone to agglomeration, and has excellent stirring performance. The screw-ribbon stirring device is fixed to the drive shaft in a specific manner. Each screw ribbon is independent of each other, avoiding the cumbersome disassembly process during wear and replacement.

[0009] The technical solution adopted by the present invention is as follows: A screw-belt type pre-ash barrel, which includes a barrel body and a stirring device arranged in the barrel body and used for mixing mother liquor and ash emulsion, the stirring device includes a reduction motor fixed to the top of the barrel body, a transmission shaft connected to the output end of the reduction motor and extending to the inside of the barrel body, a plurality of screw-belt fixing seats fixed on the transmission shaft, a plurality of screw belts detachably connected to the screw-belt fixing seats, and a dispersion disk fixed to the bottom end of the transmission shaft; the barrel body is provided with a mother liquor inlet for mother liquor to enter, a ash emulsion inlet for ash emulsion to enter, and a sand liquid outlet for outputting a blending liquid formed by mixing the mother liquor and the ash emulsion.

[0010] Furthermore, multiple screw belt fixing seats are arranged at intervals along the axial direction of the transmission shaft. The screw belt fixing seat is a columnar body with a through groove in the center. The screw belt fixing seat includes a side surface and a top surface. The through groove is for the transmission shaft to pass through the screw belt fixing seat and be fixedly connected to the screw belt fixing seat. A fixing groove (for example, a square groove) is opened on the screw belt fixing seat, and threaded holes are opened on the screw belt fixing seat on both sides of the fixing groove.

[0011] Furthermore, the two spiral belts cooperate with each other to form a stirring unit, and the two spiral belts forming the stirring unit cross and surround each other in space and are independent of each other. Preferably, a plurality of stirring units are arranged on the transmission shaft, and adjacent stirring units are preferably distributed at 90°.

[0012] Furthermore, the spiral belt includes a spiral belt blade, a plurality of support rods fixedly connected to the spiral belt blade, and a fixing buckle arranged at one end of the support rod and detachably connected to the spiral belt fixing seat.

[0013] Furthermore, the spiral blades are coiled inside the barrel body, and each spiral blade is fixedly connected to two support rods at the same time. Preferably, the two support rods are symmetrically distributed at 180° on both sides of the transmission shaft and are spaced apart in the height direction of the transmission shaft. The support rods in the same stirring unit are parallel, and the support rods in different stirring units are vertical.

[0014] Furthermore, the fixing buckle is a semi-enclosed body formed by a side wall and a top plate, the side wall is arc-shaped, the side wall cooperates with the side of the screw fixing seat, the top plate is semi-annular, the outer ring edge of the top plate is connected to the top edge of the side wall, the lower surface of the top plate fits the top surface of the screw fixing seat, the top plate is provided with a protrusion (for example, a square protrusion), the protrusion matches the fixing groove, the protrusion is used to insert the fixing groove to position the fixing buckle, through holes are opened on the top plate on both sides of the protrusion, the through holes are used to cooperate with threaded hole one, the bolts pass through threaded hole one and the through holes from top to bottom in turn and are tightened to achieve the connection between the fixing buckle and the screw fixing seat.

[0015] Furthermore, the dispersion disk is open and disk-shaped as a whole. An axial hole is opened in the center of the dispersion disk for fixed connection with the transmission shaft. The outer edge of the dispersion disk is provided with a plurality of trapezoidal folded edges, which are staggered and folded up and down. The body of the dispersion disk is evenly provided with a plurality of (for example, 4-12, further 6-9) dispersion sheets, which are staggered and folded up and down on the body of the disk, and a through hole is formed at the folding part of each dispersion sheet, that is, each dispersion sheet is equivalent to a part of the dispersion disk that is flipped up or down, preferably flipped up or down and distributed alternately at intervals, and the angle formed with the disk surface can be 45-90 degrees, and the flipped part forms upper and lower through holes, and the dispersion disk is arranged at the lower part of the barrel body, close to the bottom surface of the barrel body.

[0016] Furthermore, the barrel body is provided with a steam outlet, a cleaning liquid inlet, a manhole, a sand outlet and a barrel body fixing seat. The mother liquid inlet and the steam outlet are both tubular bodies. The mother liquid inlet and the steam outlet are located at the top of the barrel body. The mother liquid inlet is located at the port inside the barrel body and is provided with a mesh grille for filtering large impurities. The mother liquid inlet is arranged above the ash slurry inlet. A plurality of atomizing nozzles extending into the steam outlet are arranged on the pipe wall of the steam outlet. There are multiple barrel body fixing seats, which are evenly distributed around the barrel body. The sand outlet is arranged below the sand liquid outlet. The cleaning liquid inlet is arranged at the upper part of the barrel body. The manhole is arranged at the lower part of the barrel body.

[0017] Furthermore, a boss is pressed on the bottom of the barrel body, and a circular groove for arranging the rotating transmission shaft is opened on the boss.

[0018] Beneficial effects of the present invention: The spiral ribbon pre-ash barrel of the present invention can fully mix the preheated mother liquor and lime milk through multiple groups of staggered spiral ribbon stirring units and bottom open dispersion disks, so that the materials are evenly distributed in the barrel body, and the mixing efficiency is improved. Compared with the traditional frame-type pre-ash barrel, the spiral ribbon stirring device has a simple structure, a small attachment surface and is not easy to produce stuttering. At the same time, the stirring performance is better than the paddle type, and each spiral ribbon is independent of each other, avoiding the cumbersome disassembly process when worn and replaced; the open dispersion disk at the bottom of the pre-ash barrel can effectively slow down the deposition and siltation of sand at the bottom, thereby extending the working cycle of the device; when the spiral ribbon fixing seat is connected to the fixed buckle, the lower surface of the fixed buckle top plate fits the top surface of the spiral ribbon fixing seat, and the inner surface of the fixed buckle side wall fits the side of the spiral ribbon fixing seat, thereby improving the stability of the connection between the spiral ribbon blade and the transmission shaft. The spiral ribbon pre-ash barrel of the present invention has high mixing efficiency, strong structural stability, and is easy to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the spiral ribbon type pre-ash barrel of the present invention.

[0020] Figure 2 Schematic diagram of the barrel structure.

[0021] Figure 3 Schematic diagram of the top of the barrel.

[0022] Figure 4 It is a schematic diagram of the structure of the stirring device.

[0023] Figure 5 It is a schematic diagram of the structure of the screw belt fixing seat.

[0024] Figure 6 Schematic diagram of the spiral ribbon structure.

[0025] Figure 7 A top view of the spiral ribbon structure.

[0026] Figure 8Schematic diagram of the structure of the dispersion disk.

[0027] Reference numerals: 10-barrel body, 101-mother liquor inlet, 102-steam outlet, 103-ash milk inlet, 104-cleaning liquid inlet, 105-manhole, 106-sand outlet, 107-sand liquid outlet, 108-barrel body fixing seat, 109-atomizing nozzle, 20- stirring device, 201- reduction motor, 202- transmission shaft, 203- screw belt fixing seat, 204- fixing groove, 205- through groove, 206- threaded hole 1, 30-screw belt, 301-screw belt blade, 302-support rod, 303-fixing buckle, 304-protrusion, 305-through hole, 40-dispersion disc, 401-trapezoidal fold, 402-dispersion sheet. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] like Figure 1-8 As shown, a screw-belt type pre-ash barrel comprises a barrel body 10 and a stirring device 20 disposed in the barrel body 10 and used to mix mother liquor and ash milk, the stirring device 20 comprises a reduction motor 201 fixed to the top of the barrel body 10, a transmission shaft 202 connected to the rotating shaft of the reduction motor 201 and extending to the inside of the barrel body 10, a plurality of screw-belt fixing seats 203 fixed on the transmission shaft 202, a plurality of screw belts 30 detachably connected to the screw-belt fixing seats 203, and a dispersion plate 40 fixed to the bottom end of the transmission shaft 202, and a mother liquor inlet 101 for mother liquor to enter, an ash milk inlet 103 for ash milk to enter, and a sand liquid outlet 107 for outputting a blending liquid formed by mixing the mother liquor and the ash milk on the barrel body 10. The power input end of the reducer in the reduction motor is connected to the motor, and the speed ratio can be, for example, 1:25-40, preferably about 1:34.

[0030] like Figure 1 , Figure 3 As shown, the barrel body 10 is a closed cylindrical structure, and the height may be, for example, 8-10 m, and the diameter may be, for example, 4-5 m.

[0031] like Figure 8As shown, multiple screw belt fixing seats 203 are arranged at intervals along the axial direction of the transmission shaft 202. The screw belt fixing seat 203 is a columnar body with a through groove 205 in the center. The screw belt fixing seat 203 includes a side surface and a top surface. The through groove 205 allows the transmission shaft 202 to pass through the screw belt fixing seat 203 and be fixedly connected to the screw belt fixing seat 203, such as a welding connection. A fixing groove 204 is respectively opened on both sides of the screw belt fixing seat 203, and preferably the two fixing grooves 204 are symmetrically distributed at 180° for fixing the screw belt 30. The screw belt fixing seats 203 on both sides of the fixing groove 204 are provided with threaded holes 206 for fixing and assembling the screw belt 30. For example, there can be four screw belt fixing seats 203, which are equidistantly distributed on the transmission shaft 202, and every two screw belt fixing seats 203 fix two screw belts 30 spirally wound around the outer periphery of the transmission shaft 202.

[0032] like Figure 1 , Figure 4 As shown, two spiral belts 30 cooperate with each other to form a stirring unit. The two spiral belts 30 forming the stirring unit are cross-circled in space and are independent of each other, which is convenient for independent replacement when worn and avoids large-scale disassembly of the device. Multiple stirring units are arranged on the transmission shaft 202, and adjacent stirring units can be distributed at 90° to enhance the stirring intensity. For example, two stirring units are arranged.

[0033] like Figure 1 , Figure 4 , Figure 6 , Figure 7As shown, the spiral belt 30 includes a spiral belt blade 301, a plurality of support rods 302 fixedly connected to the spiral belt blade 301, and a fixing buckle 303 disposed at one end of the support rod 302 and detachably connected to the spiral belt fixing seat 203. The spiral belt blade 301 is wound inside the barrel body 10. The pitch of the spiral belt blade 301 can be, for example, 1 / 8-5 / 8 of the height of the barrel body 10, preferably about 3 / 8, the starting angle can be, for example, 200°-250°, preferably about 225°, the diameter of the spiral belt blade 301 and the diameter of the barrel body 10 can be, for example, 1:1-5, preferably 1:2-4, and further about 1:3, and each spiral belt blade 301 is fixedly connected to two support rods 302 at the same time. Preferably, the two support rods 302 are symmetrically distributed on both sides of the transmission shaft 202 at 180° in the radial direction, and are spaced apart in the height direction of the transmission shaft 202. The distance between the two support rods 302 can be, for example, about half of the pitch of the spiral belt blade 301. Preferably, the support rods 302 in the same stirring unit are parallel and perpendicular to the support rods 302 in the adjacent stirring units. Preferably, the support rods 302 of the same height in the same stirring unit are connected to both sides of the same screw belt fixing seat 203. The fixing buckle 303 is a semi-enclosed body formed by the side wall and the top plate. The side wall is arc-shaped, and the side wall is preferably semicircular. The side wall cooperates with the side of the screw belt fixing seat 203. The top plate is semi-annular. The outer ring edge of the top plate is connected to the top edge of the side wall. The lower surface of the top plate fits the top surface of the screw belt fixing seat 203. The top plate is provided with a protrusion 304. The protrusion 304 matches the shape of the fixing groove 204. The protrusion 304 is used to insert into the fixing groove 204 to position the fixing buckle 303. The protrusion 304 Through holes 305 are provided on the top plates on both sides, and the protrusions 304 are inserted downward into the fixing grooves 204. The lower surface of the top plate fits the top surface of the screw belt fixing seat 203, and the inner surface of the side wall fits the side surface of the screw belt fixing seat 203. The through hole 305 is coaxially matched with the threaded hole 1 206. After the bolt passes through the threaded hole 1 206 and the through hole 305 from top to bottom, it is tightened with a nut to achieve the connection between the fixing buckle 303 and the screw belt fixing seat 203. When the screw belt 30 needs to be removed, the nut is loosened, the bolt is removed, and the screw belt blade 301 is driven upward, the protrusion 304 is separated from the fixing groove 204, and the screw belt blade 301 is removed. In a preferred embodiment, the screw belt blade 301 has a screw belt blade width of 50-80 mm and a blade thickness of 6-8 mm.

[0034] like Figure 8As shown, the dispersion disk 40 is open and disk-shaped as a whole (the diameter of the dispersion disk is about 3 / 5 to 4 / 5 of the inner diameter of the barrel body), the center of the dispersion disk 40 is provided with an axial hole for fixed connection with the transmission shaft 202, the outer edge of the dispersion disk 40 is provided with a plurality of trapezoidal folded edges 401, the trapezoidal folded edges 401 are staggered and folded up and down, and the folding angle can be, for example, 45°, and the body of the dispersion disk 40 is evenly provided with a plurality of dispersion sheets 402, for example, 3-12, preferably 4-9, more preferably about 6, which are evenly distributed in a ring around the center of the dispersion disk, and the distance from the center of the circle to the dispersion sheet is about half of the dispersion disk. The folded parts are arranged at intervals and the angle formed with the disk surface can be 45-90 degrees. The turned-up parts form upper and lower through holes, and the folding angle can be, for example, 45°. The dispersion sheet 402 is, for example, rectangular. The dispersion disk 40 is arranged at the lower part of the barrel body, close to the bottom surface of the barrel body, so as to adapt to the high-density environment at the bottom of the barrel, enhance the stirring performance at the bottom of the barrel, and prevent the bottom of the barrel from being blocked by sand.

[0035] like Figure 2 , Figure 3As shown, the barrel body 10 is also provided with a steam outlet 102, a cleaning liquid inlet 104, a manhole 105, a sand outlet 106 and a barrel body fixing seat 108. The mother liquid inlet 101 and the steam outlet 102 are both tubular bodies. The mother liquid inlet 101 and the steam outlet 102 are located at the top of the barrel body. The mother liquid inlet 101 is located at the port inside the barrel body 10 and is provided with a mesh grille for filtering large impurities. The mother liquid inlet 101 is arranged above the ash milk inlet 103 to facilitate the full mixing of the ash milk and the mother liquid. The steam outlet 102 is used to release the steam in the barrel body 10 and control the pressure in the barrel body 10. The steam is The blending liquid is evaporated and formed, and a plurality of atomizing nozzles 109 extending into the steam outlet 102 are arranged on the pipe wall of the steam outlet 102, and the plurality of atomizing nozzles 109 are evenly distributed around the steam outlet 102. For example, the atomizing nozzles 109 can be two or three, or even more, and can be symmetrically distributed. The atomizing nozzles 109 are used to spray water mist into the steam outlet to spray and wash the steam. The atomizing nozzles 109 are used to remove the blending liquid brought out by the steam to prevent subsequent pipeline blockage; there are multiple barrel body fixing seats 108, which are evenly distributed around the barrel body 10, and the barrel body fixing seats 108 are preferably fixed to the barrel body On the outer wall in the middle of 10, a barrel fixing seat 108 is used to fix the pre-ash barrel, and a sand outlet 106 is arranged below the sand liquid outlet 107. The sand outlet 106 is used to release the silt in the barrel 10 when stopping work for cleaning. The sand outlet 106 is a slow-opening cock valve to avoid operating errors when workers use it; a cleaning liquid inlet 104 is arranged at the upper part of the barrel 10, and the cleaning liquid inlet 104 is used to input cleaning liquid to clean the inside of the barrel 10, and the clean liquid and waste liquid are discharged from the sand liquid outlet 107; a manhole 105 is arranged at the lower part of the barrel 10, and the manhole 105 is used for personnel to enter and exit the barrel 10 for inspection and maintenance; The preheated mother liquor enters the pre-ash barrel from the ash milk inlet 103 and the mother liquor inlet 101 respectively (the volume ratio of the ash milk to the preheated mother liquor can be 1:1-5), and is stirred, mixed and reacted by two sets of spiral ribbon stirring units of the stirring device 20, so that the bound ammonium therein is converted into free ammonia to form a blending liquid which is discharged from the sand liquid outlet 107, and then enters the distillation tower for ammonia distillation. The steam generated during the reaction is discharged through the steam outlet 102. In the process of the steam being discharged through the steam outlet 102, it is sprayed and washed through a plurality of atomizing nozzles 109 extending into the steam outlet 102 to remove the blending liquid brought out by the steam.

[0036] like Figure 1 , Figure 2 As shown, a boss is pressed on the bottom of the barrel body 10 , and a circular groove for arranging the transmission shaft 202 is opened on the boss. The specification of the circular groove can be, for example, Φ80, which matches the size of the transmission shaft 202 . Example 1

[0037] Use Figure 1-8The screw-belt type pre-ash barrel shown includes a barrel body 10 and a stirring device 20 arranged in the barrel body 10 and used to mix mother liquor and ash emulsion. The stirring device 20 includes a reduction motor 201 fixed to the top of the barrel body 10, a transmission shaft 202 connected to the rotating shaft of the reduction motor 201 and extending to the inside of the barrel body 10, a plurality of screw-belt fixing seats 203 fixed on the transmission shaft 202, a plurality of screw belts 30 detachably connected to the screw-belt fixing seats 203, and a dispersion disk 40 fixed to the bottom end of the transmission shaft 202. The barrel body 10 is provided with a mother liquor inlet 101 for the mother liquor to enter, a ash emulsion inlet 103 for the ash emulsion to enter, and a sand liquid outlet 107 for outputting a blending liquid formed by mixing the mother liquor and the ash emulsion.

[0038] There are four screw belt fixing seats 203, which are arranged at basically equal intervals along the axial direction of the transmission shaft 202. The screw belt fixing seat 203 is a columnar body with a through groove 205 in the center. The screw belt fixing seat 203 includes a side surface and a top surface. The through groove 205 allows the transmission shaft 202 to pass through the screw belt fixing seat 203 and be fixedly connected to the screw belt fixing seat 203. A fixing groove 204 is respectively opened on both sides of the screw belt fixing seat 203. Preferably, the two fixing grooves 204 are symmetrically distributed at 180° for fixing the screw belt 30. The screw belt fixing seats 203 on both sides of the fixing groove 204 are provided with threaded holes 206 for fixing and assembling the screw belt 30.

[0039] The two spiral ribbons 30 cooperate with each other to form a stirring unit. The two spiral ribbons 30 forming the stirring unit cross and surround each other in space and are independent of each other. Two stirring units are arranged on the transmission shaft 202 and are distributed at 90 degrees.

[0040] The spiral belt 30 includes a spiral belt blade 301, a plurality of support rods 302 fixedly connected to the spiral belt blade 301, and a fixing buckle 303 arranged at one end of the support rod 302 and detachably connected to the spiral belt fixing seat 203. The spiral belt blade 301 is coiled inside the barrel body 10, and each spiral belt blade 301 is fixedly connected to two support rods 302 at the same time. The two support rods 302 are symmetrically distributed at 180° on both sides of the transmission shaft 202 in the radial direction, and are spaced apart in the height direction of the transmission shaft 202. The fixing buckle 303 is a semi-enclosed body formed by a side wall and a top plate. The side wall is arc-shaped, the side wall is semicircular, the side wall cooperates with the side of the screw belt fixing seat 203, the top plate is semi-annular, the outer ring edge of the top plate is connected to the top edge of the side wall, the lower surface of the top plate fits the top surface of the screw belt fixing seat 203, the top plate is provided with a protrusion 304, the protrusion 304 matches the shape of the fixing groove 204, the protrusion 304 is used to insert the fixing groove 204, and the fixing buckle 303 is positioned. There are through holes 305 on the top plates on both sides of the protrusion 304, and the protrusion 304 is inserted downward into the fixing groove 204, the lower surface of the top plate fits the top surface of the screw belt fixing seat 203, and the inner surface of the side wall fits the side surface of the screw belt fixing seat 203. The through hole 305 is coaxially matched with the threaded hole 206. After the bolt passes through the threaded hole 206 and the through hole 305 from top to bottom in sequence, it is tightened with a nut to achieve the connection between the fixing buckle 303 and the screw belt fixing seat 203. When the screw belt 30 needs to be removed, the nut is loosened, the bolt is removed, the screw belt blade 301 is driven upward, the protrusion 304 is disengaged from the fixing groove 204, and the screw belt blade 301 is removed.

[0041] The dispersion disk 40 is open and disk-shaped as a whole. An axial hole is opened in the center of the dispersion disk 40 for fixed connection with the transmission shaft 202. The outer edge of the dispersion disk 40 is provided with a plurality of trapezoidal folded edges 401, and the trapezoidal folded edges 401 are staggered and folded up and down. The body of the dispersion disk 40 is evenly provided with a plurality of dispersion sheets 402, and the plurality of dispersion sheets 402 are staggered and folded up and down on the body of the disk. The dispersion disk 40 is arranged at the lower part of the barrel body.

[0042] A boss is pressed on the bottom of the barrel body 10 , and a circular groove for arranging and rotating the transmission shaft 202 is formed on the boss. The specification of the circular groove matches the size of the transmission shaft 202 .

[0043] The barrel body 10 is also provided with a steam outlet 102, a cleaning liquid inlet 104, a manhole 105, a sand outlet 106 and a barrel body fixing seat 108. The mother liquid inlet 101 and the steam outlet 102 are both tubular bodies. The mother liquid inlet 101 and the steam outlet 102 are located at the top of the barrel body. The mother liquid inlet 101 is located at the port inside the barrel body 10 and is provided with a mesh grille for filtering large impurities. The mother liquid inlet 101 is arranged above the ash milk inlet 103 to facilitate the full mixing of the ash milk and the mother liquid. The steam outlet 102 is used to release the steam in the barrel body 10 to control the barrel body 1 0, the steam is formed by evaporation of the blending liquid, a plurality of atomizing nozzles 109 extending into the steam outlet 102 are arranged on the pipe wall of the steam outlet 102, and the plurality of atomizing nozzles 109 are evenly distributed around the steam outlet 102, and the atomizing nozzles 109 are used to spray water mist into the steam outlet to spray and wash the steam, and the atomizing nozzles 109 are used to remove the blending liquid brought out by the steam to prevent subsequent pipeline blockage; there are multiple barrel body fixing seats 108, which are evenly distributed around the barrel body 10, and the barrel body fixing seats 108 are preferably fixed to the outer wall in the middle of the barrel body 10 The barrel body fixing seat 108 is used to fix the pre-ash barrel, and the sand outlet 106 is arranged below the sand liquid outlet 107. The sand outlet 106 is used to release the silt in the barrel body 10 when stopping work for cleaning. The sand outlet 106 is a slow-opening cock valve to avoid operating errors when workers use it; the cleaning liquid inlet 104 is arranged at the upper part of the barrel body 10, and the cleaning liquid inlet 104 is used to input cleaning liquid to clean the inside of the barrel body 10, and the clean liquid and waste liquid are discharged from the sand liquid outlet 107; the manhole 105 is arranged at the lower part of the barrel body 10, and the manhole 105 is used for personnel to enter and exit the barrel body 10 for inspection and maintenance; the ash milk and the preheated mother liquor enter the pre-ash barrel from the ash milk inlet 103 and the mother liquor inlet 101 respectively, and are stirred, mixed and reacted by the two sets of spiral stirring units of the stirring device 20, so that the bound ammonium therein is converted into free ammonia to form a blending liquid and is discharged from the sand liquid outlet 107, and then enters the distillation tower for ammonia evaporation, and the steam generated during the reaction is discharged through the steam outlet 102. In the process of the steam being discharged through the steam outlet 102, it is sprayed and washed through a plurality of atomizing nozzles 109 extending into the steam outlet 102 to remove the blending liquid brought out by the steam.

[0044] By using the screw-ribbon type pre-ash barrel of the above embodiment, the mixing efficiency is greatly improved, the screw-ribbon type stirring device has a small attachment surface and is not easy to produce stuttering, and the stirring performance is better than the paddle type. Since each screw ribbon is independent of each other, the cumbersome disassembly process during wear and replacement is avoided; the open dispersion plate at the bottom of the pre-ash barrel can effectively slow down the deposition and siltation of sand at the bottom, significantly extending the working cycle of the device; the screw ribbon blades are firmly connected to the drive shaft and are easy to disassemble and maintain.

[0045] The preferred embodiments of the present invention are described above, however, the above description is not intended to be limiting. A person skilled in the art may make many changes or modifications to the present invention without departing from the spirit and scope of the present invention. The changes or modifications should be included within the scope of the appended claims.

Claims

1. A screw-belt type pre-ash barrel, characterized in that: The invention comprises a barrel (10) and a stirring device (20) arranged in the barrel (10) and used for mixing mother liquor and ash emulsion. The stirring device (20) comprises a reduction motor (201) fixed to the top of the barrel (10), a transmission shaft (202) connected to the output end of the reduction motor (201) and extending to the inside of the barrel (10), a plurality of screw belt fixing seats (203) fixed to the transmission shaft (202), a plurality of screw belts (30) detachably connected to the screw belt fixing seats (203), and a dispersion plate (40) fixed to the bottom end of the transmission shaft (202). The barrel (10) is provided with a mother liquor inlet (101) for mother liquor to enter, a ash emulsion inlet (103) for ash emulsion to enter, and a sand liquid outlet (107) for outputting a blended liquid formed by mixing the mother liquor and the ash emulsion.

2. The screw-belt type pre-ash bucket according to claim 1, characterized in that: A plurality of screw belt fixing seats (203) are arranged at intervals along the axial direction of the transmission shaft (202); the screw belt fixing seat (203) is a columnar body with a through groove (205) at the center; the screw belt fixing seat (203) comprises a side surface and a top surface; the through groove (205) allows the transmission shaft (202) to pass through the screw belt fixing seat (203) and be fixedly connected to the screw belt fixing seat (203); a fixing groove (204) is formed on the screw belt fixing seat (203); and threaded holes (206) are formed on the screw belt fixing seat (203) on both sides of the fixing groove (204).

3. The screw-belt type pre-ash bucket according to claim 2, characterized in that: The two spiral ribbons (30) cooperate with each other to form a stirring unit, and the two spiral ribbons (30) forming the stirring unit cross and surround each other in space and are independent of each other.

4. The screw-belt type pre-ash barrel according to claim 3, characterized in that: A plurality of stirring units are arranged on the transmission shaft (202), and adjacent stirring units are distributed at 90 degrees.

5. The screw-belt type pre-ash bucket according to claim 3 or 4, characterized in that: The spiral belt (30) comprises a spiral belt blade (301), a plurality of support rods (302) fixedly connected to the spiral belt blade (301), and a fixing buckle (303) arranged at one end of the support rod (302) and detachably connected to the spiral belt fixing seat (203).

6. The screw-belt type pre-ash barrel according to claim 5, characterized in that: The spiral blades (301) are coiled inside the barrel (10), and each spiral blade (301) is fixedly connected to two support rods (302) at the same time. The two support rods (302) are symmetrically distributed at 180 degrees on both sides of the transmission shaft (202) and are spaced apart in the height direction of the transmission shaft (202). The support rods (302) in the same stirring unit are parallel, and the support rods (302) in different stirring units are perpendicular.

7. The screw-belt type pre-ash barrel according to claim 6, characterized in that: The fixing buckle (303) is a semi-enclosed body formed by a side wall and a top plate. The side wall is arc-shaped and matched with the side surface of the screw belt fixing seat (203). The top plate is semi-annular. The outer ring edge of the top plate is connected to the top edge of the side wall. The lower surface of the top plate fits the top surface of the screw belt fixing seat (203). The top plate is provided with a protrusion (304). The protrusion (304) matches the fixing groove (204). The protrusion (304) is used to insert into the fixing groove (204) to position the fixing buckle (303). Through holes (305) are opened on the top plate on both sides of the protrusion (304). The through holes (305) are used to match with the threaded hole 1 (206). The bolts are passed through the threaded hole 1 (206) and the through holes (305) from top to bottom in sequence and then tightened to achieve the connection between the fixing buckle (303) and the screw belt fixing seat (203).

8. The screw-belt type pre-ash bucket according to any one of claims 1 to 7, characterized in that: The dispersion disk (40) is open-type and disk-shaped as a whole. An axial hole is opened in the center of the dispersion disk (40) for fixed connection with the transmission shaft (202). The outer edge of the dispersion disk (40) is provided with a plurality of trapezoidal folded edges (401), and the trapezoidal folded edges (401) are staggered and folded up and down. The body of the dispersion disk (40) is evenly provided with a plurality of dispersion sheets (402), and the plurality of dispersion sheets (402) are staggered and folded up and down on the body of the dispersion disk. A through hole is formed at the folded portion of each dispersion sheet. The dispersion disk (40) is arranged at the lower part of the barrel body (10).

9. The screw-belt type pre-ash bucket according to any one of claims 1 to 8, characterized in that: The barrel body (10) is also provided with a steam outlet (102), a cleaning liquid inlet (104), a manhole (105), a sand outlet (106) and a barrel body fixing seat (108). The mother liquid inlet (101) and the steam outlet (102) are both tubular bodies. The mother liquid inlet (101) and the steam outlet (102) are located at the top of the barrel body (10). The mother liquid inlet (101) is located at the port inside the barrel body (10) and is provided with a mesh grille for filtering large impurities. The port (101) is arranged above the ash emulsion inlet (103); a plurality of atomizing nozzles (109) extending into the steam outlet (102) are arranged on the pipe wall of the steam outlet (102); a plurality of barrel body fixing seats (108) are evenly distributed around the barrel body (10); a sand outlet (106) is arranged below the sand liquid outlet (107); a cleaning liquid inlet (104) is arranged at the upper part of the barrel body (10); and a manhole (105) is arranged at the lower part of the barrel body (10).

10. The screw-belt type pre-ash barrel according to any one of claims 1 to 9, characterized in that: A boss is pressed on the bottom of the barrel body (10), and a circular groove for arranging a rotating transmission shaft (202) is formed on the boss.

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