CN112179109A

CN112179109A - Coal slime drying system

Info

Publication number: CN112179109A
Application number: CN201910591581.3A
Authority: CN
Inventors: 何耀明
Original assignee: Wuxi Juyan Energy Technology Co ltd
Current assignee: Wuxi Juyan Energy Technology Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2021-01-05

Abstract

The invention relates to the technical field of coal slime drying, and discloses a coal slime drying system, which has the technical scheme that the system comprises a crushing device, a drying device and a tail gas treatment device; the crushing device comprises a blanking hopper, extrusion rollers and slicing rollers, wherein the extrusion rollers are provided with cutter targets, the slicing rollers are positioned below the extrusion rollers, one slicing roller is provided with a cutter, the other slicing roller is provided with a notch, a belt conveying line is arranged below a blanking port, the drying device comprises a drying box, a burner and an induced draft fan, a first conveying line, a second conveying line and a third conveying line are arranged in the drying box, the top side of the drying box is communicated with a flame inlet pipe, the drying box is communicated with an air draft pipe, the flame inlet pipe is communicated with the burner, and the air draft pipe is communicated with the induced draft fan; the draught fan intercommunication has the tail gas conveyer pipe, and tail gas processing apparatus includes the gas wash tower, and the tail gas conveyer pipe communicates in the lateral wall of gas wash tower, and the top in the gas wash tower is equipped with atomizer. The invention has the advantage of improving the single drying effect of the coal slime.

Description

Coal slime drying system

Technical Field

The invention relates to the technical field of coal slime drying, in particular to a coal slime drying system.

Background

The coal slime is one of byproducts of coal washing, has the characteristics of high heat generation, fine particles, high viscosity, strong water retention and the like, and is mainly used in industries such as power plants and the like. In the field of power generation, because the demand of coal slime is large, and the coal slime is difficult to transport, so many power plants can select to directly stack the coal slime nearby. In the stacking process, rainwater can infiltrate the coal slime, so that the water content of the coal slime is increased, the requirement of a power plant cannot be met, the power plant needs to use a coal slime drying device, and the water content of the coal slime meets the use requirement of the power plant.

At present, chinese patent with publication number CN109186201A discloses a drying system for tail coal mud is selected separately again, including drying tower, screw pump, high-speed fan, air heat source, first cyclone and receipts powder section of thick bamboo, the screw pump sets up on drying tower's top, and passes through the pipeline intercommunication, be provided with high-speed fan on the pipeline, high-speed fan is used for blowing into drying tower with the tail coal mud that the screw pump sent in internal, air heat source and drying tower top intercommunication for the dry tail coal mud that is located drying tower, drying tower's bottom is passed through connecting tube and is connected on first cyclone, first cyclone's bottom is provided with receives the powder section of thick bamboo, air exhauster and blast pipe intercommunication are passed through at first cyclone's top.

This kind of a drying system for tail coal mud is selected separately again puts into the drying tower internally with the coal slime in the use, and the coal slime is blown through high-speed fan and is realized breaing up, and the air heat source supplies the heat towards the drying tower in simultaneously, and the coal slime is realized drying under thermal heating. However, when the device breaks up the coal slime, the coal slime cannot be completely broken up only by the airflow of the high-speed fan, and the coal slime still exists in a large bulk state, so that the drying effect of the coal slime is poor, repeated drying is needed, and the power generation efficiency of a power plant is seriously influenced.

Disclosure of Invention

The invention aims to provide a coal slime drying system which has the advantage of improving the single-time drying effect of coal slime.

The technical purpose of the invention is realized by the following technical scheme:

a coal slime drying system comprises a grinding device, a drying device and a tail gas treatment device;

the crushing device comprises a blanking hopper, two extrusion rollers and two slicing rollers, wherein the two extrusion rollers are rotatably connected in the blanking hopper and are arranged along the horizontal direction, the two extrusion rollers are provided with cutter targets, the cutter targets on the two extrusion rollers are arranged in a staggered manner, the slicing rollers are rotatably connected in the blanking hopper and are positioned below the extrusion rollers, the two slicing rollers are arranged along the horizontal direction, one of the two slicing rollers is provided with a cutter along the length direction of the slicing roller, the other slicing roller is provided with a notch meshed with the cutter, and the blanking hopper is externally provided with a first driving motor for driving the extrusion rollers to rotate and a second driving motor for driving the slicing rollers to rotate;

the bottom of the blanking hopper is provided with a blanking port, a belt conveying line is arranged below the blanking port, the drying device comprises a drying box, a burner and a draught fan, a feed inlet is formed in one side of the drying box, a discharge outlet is formed in one side of the drying box relative to the feed inlet, one end, far away from the blanking hopper, of the belt conveying line extends into the drying box through the feed inlet, a horizontal first conveying line, a horizontal second conveying line and a horizontal third conveying line are sequentially arranged in the drying box from top to bottom, a third driving motor, a fourth driving motor and a fifth driving motor are arranged outside the drying box and used for driving the first conveying line, the second conveying line and the third conveying line to move, the conveying directions of the first conveying line, the second conveying line and the third conveying line are sequentially and alternately arranged, one end, close to the feed inlet, of the first conveying line is positioned below the belt conveying line, and one end, far away from the feed, the burner and the induced draft fan are arranged on the ground, the top side of the drying box is communicated with a flame inlet pipe, one side of the drying box, which is opposite to the flame inlet pipe, is communicated with a draft pipe, one end of the flame inlet pipe, which is far away from the drying box, is communicated with a flame outlet of the burner, and one end of the draft pipe, which is far away from the drying box, is communicated with an air inlet of the induced draft fan;

the air outlet intercommunication of draught fan has the tail gas delivery pipe, tail gas processing apparatus includes the gas wash tower, the tail gas delivery pipe communicates in the lateral wall of gas wash tower, the top surface intercommunication of gas wash tower has the output chimney, and the bottom surface intercommunication has the feed opening, the bottom fixedly connected with water storage tank of gas wash tower, water storage tank and feed opening communicate with each other, water solution has been held in the water storage tank, top in the gas wash tower is equipped with a plurality of and is used for spraying the atomizer of tail gas, be equipped with the suction pump on the water storage tank, the intercommunication has the feed liquor pipe between the water inlet of suction pump and the water storage tank, the delivery port intercommunication of suction pump has the drain pipe, the drain pipe communicates in atomizer.

Through adopting above-mentioned technical scheme, when handling the coal slime, the coal slime is at first thrown into grinding device, and the squeeze roll among the grinding device produces rotatoryly under first driving motor's drive, and the sword target on the squeeze roll breaks up the coal slime, and the coal slime after breaking up falls to the section roller on, and the excision of cutter is passed through to the section roller department, and the coal slime forms the slice coal slime of big or small rule. The coal slime after slicing falls onto a belt conveying line, enters a drying box through the conveying of the belt conveying line, and firstly falls onto a first conveying line. Meanwhile, the heat generated by the burner enters the drying box through the flame inlet pipe, so that the drying box has heat. When the coal slime moves to the afterbody of first transfer chain, the coal slime falls on the second transfer chain, and final coal slime falls on the third transfer chain to through discharge gate discharge stoving case. The coal slime is when first transfer chain, second transfer chain and third transfer case, and the side is "S" shape motion, has prolonged the coal slime and is long when the stoving incasement to make the coal slime can be fully heated, every back of falling to next transfer chain on the other hand coal slime, all can the turn-over, thereby make being heated of coal slime more even. In the drying process, water vapor evaporated from the coal slime and high-temperature gas form high-temperature waste gas, and the high-temperature waste gas enters the tail gas treatment device through the tail gas conveying pipe to realize the treatment of tail gas. When the coal slime is dried, the coal slime is more thoroughly scattered by the crushing device, so that the heating area of the coal slime is increased, and the drying effect of the coal slime is improved; the cooperation that utilizes first transfer chain, second transfer chain and third transfer chain can carry out many times turn-ups to the coal slime on the one hand for the two sides of coal slime are heated comparatively evenly, and on the other hand can prolong the coal slime and be long when the stoving incasement, makes the coal slime have longer drying time, and the common cooperation of two sides has improved the final stoving effect of coal slime.

Furthermore, the flame inlet pipes are evenly distributed with at least three flame inlet pipes along the length direction of the drying box, and the exhaust pipes are evenly distributed with at least three flame inlet pipes along the length direction of the drying box.

Through adopting above-mentioned technical scheme, go into flame pipe and exhaust column along the length direction evenly distributed many of stoving case, can reduce the possibility that stoving case both ends produced the difference in temperature, improved the constancy of stoving incasement bulk temperature to make the coal slime can receive the heat comparatively evenly in the stoving case.

Furthermore, a waste heat recovery pipe is connected in parallel to the tail gas conveying pipe, a first air adjusting door used for adjusting air inflow is arranged in the waste heat recovery pipe, and one end, far away from the tail gas conveying pipe, of the waste heat recovery pipe is communicated with a flame outlet of the combustor.

Through adopting above-mentioned technical scheme, the staff adjusts the size of first air damper, and in partial high temperature tail gas can get into the flame outlet of combustor through the waste heat recovery pipe, preheat the burning position of combustor, reduced the energy of required consumption, had energy-conserving effect.

Further, a waste heat drainage tube is connected in parallel on the tail gas conveying pipe, be equipped with the second air damper that is used for adjusting the air input in the waste heat drainage tube, the one end intercommunication that tail gas conveying pipe was kept away from to the waste heat drainage tube has the heat exchanger, the heat exchanger includes heat transfer section of thick bamboo and heat exchange tube, water inlet and delivery port have been opened respectively to heat transfer section of thick bamboo length direction's both ends, the heat exchange tube is located the heat transfer section of thick bamboo, the both ends of heat exchange tube are located water inlet and delivery port, the water inlet is used for supplying cold water towards the heat exchange tube, the delivery port intercommunication has domestic water pipe, relative opening has into heat mouthful and goes out the heat mouth on the stack shell of heat transfer section.

Through adopting above-mentioned technical scheme, the staff adjusts the size of second air damper, and partial high temperature tail gas can get into in the heat transfer section of thick bamboo through the waste heat drainage tube. Meanwhile, cold water is pumped into the heat exchange pipe, the cold water exchanges heat with the introduced high-temperature waste gas to form hot water, and civil use is achieved through the guidance of the domestic water pipe. And the high-temperature waste gas is cooled through heat exchange with cold water, so that the harm of high temperature to the environment is eliminated.

Furthermore, a plurality of vibrating rods are respectively arranged in the first conveying line, the second conveying line and the third conveying line in a penetrating way, the drying box is vertically provided with vibrating grooves for accommodating the vibrating rods respectively perpendicular to the side walls of the vibrating rods, two ends of the vibrating bar penetrate out of the vibrating grooves at two sides, a supporting plate is arranged above the vibrating grooves, the supporting plate is fixedly connected with the outer side wall of the drying box, a connecting rod is slidably arranged on the supporting plate, the bottom end of the connecting rod is fixedly connected with a vibrating spear, a repeated pressure spring is clamped between the vibrating spear and the supporting plate, the repeated pressure spring is sleeved on the connecting rod, a rotating rod is arranged below the vibration groove and is rotatably connected to the outer side wall of the drying box, fixed cover is equipped with the vibration cam on the dwang, the vibrting spear is contradicted on the vibration cam, the lateral wall of stoving case is connected with and is used for driving dwang pivoted sixth driving motor.

Through adopting above-mentioned technical scheme, the coal slime is at first transfer chain, the in-process of transportation on second transfer chain and the third transfer chain, sixth driving motor is in the on-state, sixth driving motor drives the dwang and rotates this moment, the dwang drives the vibration cam and rotates, the vibration cam makes the vibrting spear carry out up-and-down reciprocating motion, reciprocating motion's vibrting spear makes first transfer chain, second transfer chain and third transfer chain surface produce the vibration, this vibration is applyed on the coal slime of motion in-process, make the coal slime keep at loose state, thereby make the heat can get into in the coal slime better, the stoving effect has further been improved.

Furthermore, the roll body of the squeeze roll is provided with a mounting hole coaxial with the knife target, and a locking bolt penetrates through the mounting hole and is in threaded connection with the knife target.

By adopting the technical scheme, the cutter target can be detached due to the arrangement of the locking bolt, and when the cutter target is damaged, a worker can independently detach the damaged cutter target to replace or maintain the damaged cutter target, so that the maintenance cost is reduced.

Further, the top of first transfer chain and be equipped with the first infrared emission pipe of a plurality of along its length direction, the below of first transfer chain and be equipped with a plurality of second infrared emission pipe along its length direction, the below of second transfer chain and be equipped with a plurality of third infrared emission pipe along its length direction, first infrared emission pipe, second infrared emission pipe, third infrared emission pipe fixed connection are in the inside wall of stoving case.

Through adopting above-mentioned technical scheme, the infrared ray of first infrared emission pipe, second infrared emission pipe, third infrared emission pipe transmission has the penetrability, can dry the inside of coal slime to this has further improved the drying effect of coal slime.

Furthermore, the power of the first infrared transmitting tube, the second infrared transmitting tube and the third infrared transmitting tube is gradually reduced.

Through adopting above-mentioned technical scheme, when the coal slime was on moving to the third transfer chain from first transfer chain, its inside moisture was evaporated to dryness gradually, consequently the power of first infrared emission pipe, second infrared emission pipe, third infrared emission pipe is decreased progressively and is set up, can be under the circumstances of guaranteeing to dry the coal slime, reaches the effect that reduces the energy consumption.

Furthermore, the aqueous solution is alkaline, and the outer side wall of the water storage tank is provided with an adding port.

By adopting the technical scheme, the water evaporated from the coal slime can take out the sulfur substances in the coal slime and attach to high-temperature waste gas. When the high-temperature waste gas enters the dust removal tower, the water flow sprayed by the atomizing spray head can enable sulfur substances in the high-temperature flue gas to descend and sink into the water solution, and the water solution neutralizes the sulfur substances, so that acidic substances contained in the air flow when the air flow is discharged through the output chimney are reduced.

In conclusion, the invention has the following beneficial effects:

1. the crushing device can crush the coal slime, so that the coal slime has a larger heating area, and the later drying effect is improved;

2. the first conveying line, the second conveying line and the third conveying line which are arranged in the drying box are matched together, so that the time of the coal slime in the drying box can be prolonged, the coal slime can be dried for a long time, and the drying effect of the coal slime is improved;

3. infrared beams emitted by the first infrared emission tube, the second infrared emission tube and the third infrared emission tube can penetrate through the coal slime to heat the interior of the coal slime, so that the drying effect of the coal slime is further improved;

4. the tail gas treatment device can cool and neutralize the high-temperature flue gas, so that the pollution of the high-temperature flue gas to the environment is reduced, and the tail gas treatment device has an environment-friendly effect;

5. the heat exchanger can utilize the heat of high-temperature waste gas to domestic water, thereby realizing the reutilization of the waste gas and having the effect of saving energy;

6. the waste heat recovery pipe can introduce the heat of part high temperature waste gas into the combustor, preheat the combustor for the required fuel of combustor reduces, further has reached energy-conserving effect with this.

Drawings

FIG. 1 is a schematic diagram of a structure for embodying the present invention;

FIG. 2 is a schematic view showing a structure of a crushing apparatus;

FIG. 3 is a cross-sectional view for embodying a cutter roller;

FIG. 4 is a schematic structural view for embodying a drying box;

fig. 5 is a sectional view for embodying an internal structure of a drying box;

FIG. 6 is an enlarged view of portion A in FIG. 4;

FIG. 7 is a schematic view showing a structure for embodying an exhaust gas treating apparatus;

FIG. 8 is a sectional view for embodying the internal structure of the exhaust gas treatment device;

fig. 9 is an exploded view for embodying a heat exchanger.

In the figure, 1, a crushing device; 11. a blanking hopper; 12. a squeeze roll; 121. a first drive motor; 122. a knife target; 123. locking the bolt; 13. a slicing roller; 131. a cutter; 132. cutting; 133. a second drive motor; 2. a drying device; 21. a drying box; 211. a feed inlet; 212. a discharge port; 22. a burner; 221. a flame inlet pipe; 222. drawing an air duct; 23. an induced draft fan; 24. a first conveyor line; 241. a third drive motor; 25. a second conveyor line; 251. a fourth drive motor; 26. a third conveyor line; 261. a fifth drive motor; 27. a first infrared ray emitting tube; 28. a second infrared transmitting tube; 29. a third infrared transmitting tube; 3. a tail gas treatment device; 31. a dedusting tower; 32. a tail gas conveying pipe; 33. an output chimney; 34. a water storage tank; 35. a liquid spraying ring pipe; 351. an atomizing spray head; 36. a water pump; 361. a liquid inlet pipe; 362. a liquid outlet pipe; 37. a waste heat recovery pipe; 38. a waste heat drainage tube; 4. a belt conveyor line; 5. a vibrating rod; 51. a vibration groove; 52. a support plate; 53. a connecting rod; 54. repeatedly pressing the spring; 55. rotating the rod; 56. a vibrating cam; 57. a synchronous sprocket; 58. a synchronization chain; 59. a sixth drive motor; 591. a drive sprocket; 6. a heat exchanger; 61. a heat exchange tube; 62. a heat exchange pipe; 63. a domestic water pipe; 64. a transition duct; 65. a gas path one-way valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a coal slime drying system, referring to fig. 1, comprises a crushing device 1, a drying device 2 and a tail gas treatment device 3. When drying the coal slime, the coal slime firstly drops into milling apparatus 1 for during the coal slime of large granule forms slice entering drying device 2, and the heat that drying device 2 produced is applyed on the coal slime, dries the moisture in the coal slime. High-temperature water vapor generated in the drying process is treated by the tail gas treatment device 3, so that the environment-friendly effect is achieved.

Referring to fig. 2, the crushing apparatus 1 includes a drop hopper 11, a squeezing roller 12, and a slicing roller 13 (refer to fig. 3). The blanking hopper 11 is erected on the ground through a bracket, the top of the blanking hopper is provided with a feeding port, and the bottom of the blanking hopper is provided with a blanking port. The squeeze rollers 12 are rotatably connected to the inside of the drop hopper 11, and two squeeze rollers are provided in the horizontal direction. The two squeezing rollers 12 are linked through the matching of a chain wheel and a chain, and a first driving motor 121 for driving one squeezing roller 12 to rotate is connected to the outer side wall of the blanking hopper 11 through a bolt.

Referring to fig. 2, the pressing rolls 12 are provided with knife targets 122, and the knife targets 122 of the two pressing rolls 12 are staggered. The body of the squeeze roll 12 is provided with a mounting hole coaxial with the knife target 122, a locking bolt 123 penetrates through the mounting hole, and the locking bolt 123 is in threaded connection with the knife target 122. The knife targets 122 are detachably connected through the locking bolts 123, and when the knife targets 122 are damaged, a worker can detach the knife targets 122 to repair or replace the knife targets 122, so that the cost for repairing the squeezing roller 12 is reduced.

Referring to fig. 2, when coal slime enters the blanking hopper 11, the rotating squeeze roll 12 drives the knife target 122 to rotate, and the knife target 122 in the rotating process breaks up the coal slime, so that the large-area coal slime is broken up into small-area coal slime, the heating area of the coal slime is increased, and the later-stage heating efficiency is improved.

Referring to fig. 3, the slicing roller 13 is rotatably connected to the inside of the drop hopper 11 and is positioned below the squeeze roller 12 (see fig. 2). The two slicing rollers 13 are provided in the horizontal direction. One of the slicing rollers 13 is connected with a cutter 131 through a bolt, and the cutter 131 is arranged along the length direction of the slicing roller 13. The other of the slicing rollers 13 is provided with a notch 132 engaged with the cutter 131. The two slicing rollers 13 are linked through the cooperation of a chain wheel and a chain, and a second driving motor 133 for driving one slicing roller 13 to rotate is connected to the outer side wall of the blanking hopper 11 through a bolt.

Referring to fig. 3, the coal slurry scattered by the squeeze roller 12 (see fig. 2) enters between the two slicing rollers 13, the coal slurry is squeezed into a sheet shape, when the cutting knife 131 on the slicing roller 13 is engaged with the notch 132, the coal slurry is cut, and the cut coal slurry forms a plurality of coal slurry pieces with regular shapes.

Referring to fig. 4, the drying apparatus 2 (see fig. 1) includes a drying box 21, a burner 22 (see fig. 1), and an induced draft fan 23 (see fig. 1). A feed opening 211 is opened at one side of the drying box 21, and a discharge opening 212 is opened at the side of the drying box 21 opposite to the feed opening 211 (see fig. 5). A belt conveyor line 4 (refer to fig. 1) is arranged below the blanking port, and the belt conveyor line 4 is erected on the ground through a support. One end of the belt conveyor line 4 away from the blanking hopper 11 (refer to fig. 1) extends into the drying box 21 through the feed port 211. The coal slurry pieces cut into pieces by the slicing roller 13 (see fig. 3) fall onto the belt conveyor line 4 through the blanking port, and the coal slurry pieces are conveyed into the drying box 21 through the belt conveyor line 4.

Referring to fig. 5, a horizontal first conveyor line 24, a horizontal second conveyor line 25, and a horizontal third conveyor line 26 are sequentially provided in the drying box 21 from top to bottom, and the first conveyor line 24, the second conveyor line 25, and the third conveyor line 26 are composed of a high-temperature-resistant belt and a conveying roller. A third drive motor 241 (see fig. 4), a fourth drive motor 251 (see fig. 4), and a fifth drive motor 261 (see fig. 4) for driving the first transfer line 24, the second transfer line 25, and the third transfer line 26 to move are connected to the outside of the drying box 21 by bolts. The transport directions of the first transfer line 24, the second transfer line 25 and the third transfer line 26 are alternately arranged in this order. The end of the first feed line 24 close to the feed port 211 is located below the belt feed line 4 (see fig. 1), and the end of the third feed line 26 remote from the feed port 211 protrudes from the discharge port 212.

Referring to fig. 1, the burner 22 and the induced draft fan 23 are erected on the ground by a bracket, the top side of the drying box 21 is communicated with a flame inlet pipe 221, and one side of the drying box 21 opposite to the flame inlet pipe 221 is communicated with an exhaust pipe 222. One end of the flame inlet pipe 221, which is far away from the drying box 21, is communicated with a flame outlet of the burner 22, and one end of the air exhaust pipe 222, which is far away from the drying box 21, is communicated with an air inlet of the induced draft fan 23.

Referring to fig. 1, the coal slurry from the belt conveyor line 4 falls down on the first conveyor line 24 (see fig. 5), and when the coal slurry is conveyed to the tail of the first conveyor line 24, the coal slurry falls down on the second conveyor line 25 (see fig. 5), and when the coal slurry is conveyed to the tail of the second conveyor line 25, the coal slurry falls down on the third conveyor line 26 (see fig. 5), and finally the coal slurry is discharged from the drying box 21 (see fig. 5) through the discharge port 212 (see fig. 5). Because the direction of transportation of first transfer chain 24, second transfer chain 25 and third transfer chain 26 sets up in turn, consequently the coal slime can be "S" shape motion in stoving case 21 to the time of coal slime in stoving case 21 has been prolonged.

Referring to fig. 1, the heat of the flame generated by the burner 22 is introduced into the drying box 21 (see fig. 4) through the flame inlet pipe 221, thereby greatly increasing the temperature in the drying box 21. The coal slime is subject to thermal evaporation in the process of moving in the drying box 21, so that the drying of the coal slime is realized. The tail gas generated in the drying process is pumped out of the drying box 21 through the induced draft fan 23, so that the treatment of the tail gas in the drying box 21 is realized.

Referring to fig. 1, four flame inlet pipes 221 are uniformly distributed along the length direction of the drying box 21, and four air exhaust pipes 222 are uniformly distributed along the length direction of the drying box 21. The four flame tubes 221 can enable the heat of the combustor 22 to be more uniformly distributed in the drying box 21 (refer to fig. 4), so that the possibility of large temperature difference between two ends in the drying device is reduced, the coal slime is dried more uniformly, and the final drying effect is improved.

Referring to fig. 5, a plurality of first infrared ray emitting tubes 27 are disposed above the first conveyor line 24 and along the length direction thereof, a plurality of second infrared ray emitting tubes 28 are disposed below the first conveyor line 24 and along the length direction thereof, a plurality of third infrared ray emitting tubes 29 are disposed below the second conveyor line 25 and along the length direction thereof, and the first infrared ray emitting tubes 27, the second infrared ray emitting tubes 28, and the third infrared ray emitting tubes 29 are fixedly connected to the inner side wall of the drying box 21. The in-process of coal slime motion in stoving case 21, first infrared emission pipe 27, second infrared emission pipe 28, third infrared emission pipe 29 infrared light beam is launched towards the coal slime, and the infrared light has the penetrability, can heat the inside moisture of coal slime, has further improved the stoving effect of coal slime from this.

Referring to fig. 5, the power of the first infrared ray emitting tube 27, the second infrared ray emitting tube 28, and the third infrared ray emitting tube 29 is gradually reduced. In the drying process of the coal slime, the water content of the coal slime on the first conveying line 24 is higher than that of the coal slime on the third conveying line 26, so that the power of the first infrared transmitting tube 27, the second infrared transmitting tube 28 and the third infrared transmitting tube 29 is gradually decreased, and the energy-saving effect can be achieved under the condition of drying the coal slime.

Referring to fig. 4 and 6, a plurality of vibration bars 5 are respectively inserted into the first transfer line 24 (see fig. 5), the second transfer line 25 (see fig. 5), and the third transfer line 26 (see fig. 5), and the vibration bars 5 are located between the high-temperature belts. The drying box 21 is vertically provided with a vibration groove 51 for accommodating the vibrating rod 5 respectively perpendicular to the side wall of the vibrating rod 5, and two ends of the vibrating rod 5 penetrate out of the vibration grooves 51 at two sides. The vibration groove 51 has a width equal to the outer diameter of the vibration rod 5 and a length greater than the outer diameter of the vibration rod 5, and the vibration rod 5 can reciprocate up and down in the vibration groove 51.

Referring to fig. 4 and 6, a support plate 52 is disposed above the vibration groove 51, and the support plate 52 is fixedly connected to an outer sidewall of the drying box 21. The support plate 52 is slidably provided with a connecting rod 53, and the bottom end of the connecting rod 53 is fixedly connected with the vibrating rod 5. A repeated compression spring 54 is arranged between the vibrating rod 5 and the supporting plate 52 in a clamping mode, and the repeated compression spring 54 is sleeved on the connecting rod 53.

Referring to fig. 4 and 6, a rotation lever 55 is provided below the vibration groove 51, and the rotation lever 55 is rotatably coupled to an outer sidewall of the drying box 21 through a bearing. The rotating lever 55 is fixedly fitted with a vibration cam 56, and the vibrating rod 5 abuts against the vibration cam 56. The rotating rod 55 is fixedly sleeved with a synchronous chain wheel 57, and the synchronous chain wheel 57 on the same side of the drying box 21 is engaged with the same synchronous chain 58. The outer side wall of the drying box 21 is connected with a sixth driving motor 59 through bolts, an output shaft of the sixth driving motor 59 is fixedly sleeved with a driving chain wheel 591, and the driving chain wheel 591 is meshed with the synchronous chain 58.

Referring to fig. 4 and 6, the sixth driving motor 59 is in a start-up state during the coal slurry moves in the drying box 21. At this time, the sixth driving motor 59 drives the synchronous chain 58 to move, the synchronous chain 58 drives the synchronous chain wheel 57 to rotate, the synchronous chain wheel 57 drives the rotating rod 55 to rotate, and the rotating rod 55 drives the vibrating cam 56 to rotate. The vibrating cam 56 cooperates with the repeated pressure spring 54 in the rotating process, so that the vibrating rod 5 moves up and down repeatedly, the vibrating rod 5 drives the surfaces of the first conveying line 24 (see fig. 5), the second conveying line 25 (see fig. 5) and the third conveying line 26 (see fig. 5) to vibrate in the up and down movement process, the vibration can disperse the passing coal slime, heat can enter the coal slime more, and the drying effect of the coal slime is further improved.

Referring to fig. 1, in the coal slurry, moisture in the coal slurry is evaporated during the drying process, and the evaporated moisture is fused with the high-temperature gas from the flame inlet pipe 221 to form a pollutant gas containing substances such as sulfur dioxide, and thus, in order to prevent the pollutant gas from polluting the environment, an exhaust gas treatment device 3 is provided.

Referring to fig. 7, the tail gas treatment device 3 (refer to fig. 1) includes a dust removal tower 31, a tail gas delivery pipe 32 is communicated with a tower body of the dust removal tower 31, and the tail gas delivery pipe 32 is communicated with an air outlet of the induced draft fan 23. The top surface of the dust removing tower 31 is communicated with an output chimney 33, and the bottom surface is communicated with a feed opening. The bottom of the dust removing tower 31 is fixedly connected with a water storage tank 34, the water storage tank 34 is communicated with the feed opening, and the water storage tank 34 is internally provided with aqueous solution which is alkaline.

Referring to fig. 8, the top of the interior of the dust removal tower 31 is fixedly connected with an annular liquid spraying ring pipe 35, the liquid spraying ring pipe 35 is communicated with a plurality of atomizing nozzles 351 arranged towards each other, and the atomizing nozzles 351 are used for spraying tail gas. The water storage tank 34 is connected with a water suction pump 36 through a bolt, a liquid inlet pipe 361 is communicated between a water inlet of the water suction pump 36 and the water storage tank 34, a liquid outlet pipe 362 is communicated with a water outlet of the water suction pump 36, and the liquid outlet pipe 362 is communicated with the liquid spraying ring pipe 35.

Referring to fig. 8, the induced draft fan 23 (see fig. 1) sucks the exhaust gas in the drying box 21 (see fig. 4) into the exhaust gas duct 32 (see fig. 1), and the exhaust gas enters the dust removal tower 31 through the exhaust gas duct 32. In the dust removal tower 31, the water pump 36 pumps the liquid in the water storage tank 34 to the liquid spraying ring pipe 35, the liquid is sprayed towards the tail gas in the dust removal tower 31 through the atomizing spray head 351, the tail gas is moistened and then is settled in the water storage tank 34, the cooling effect is achieved, meanwhile, the alkaline liquid in the water storage tank 34 can neutralize the acid gas in the tail gas, so that the acid substance content of the gas during removal is reduced, and the pollution to the environment is reduced. The treated tail gas is discharged through an output chimney 33. Further, an addition port is formed on the outer wall of the water storage tank 34, and when the alkalinity of the alkaline solution is low, the worker can add the alkaline solution into the water storage tank 34 through the addition port.

Referring to fig. 1, a waste heat recovery pipe 37 is connected in parallel to the exhaust gas conveying pipe 32, a first damper for adjusting an air inflow is disposed in the waste heat recovery pipe 37, and one end of the waste heat recovery pipe 37, which is far away from the exhaust gas conveying pipe 32, is communicated with a flame outlet of the combustor 22. Waste heat recovery pipe 37 can introduce a proper amount of tail gas into the flame outlet through the regulatory function of first air damper, thereby reaching the effect of preheating the inside of combustor 22, reducing the energy required by the flame produced by combustor 22, and having the effect of saving resources.

Referring to fig. 9, a waste heat drain pipe 38 (refer to fig. 1) is connected in parallel to the exhaust gas delivery pipe 32 (refer to fig. 1), and the waste heat drain pipe 38 is located between the waste heat recovery pipe 37 and the dust removing tower 31 (refer to fig. 7). A second damper for adjusting the intake air amount is provided in the waste heat drain pipe 38. One end of the waste heat drainage pipe 38, which is far away from the exhaust gas conveying pipe 32, is communicated with a heat exchanger 6 (refer to fig. 1), and the heat exchanger 6 comprises a heat exchange cylinder 61 and a plurality of heat exchange pipes 62 which are arranged in parallel. The body of the heat exchange cylinder 61 is provided with a heat inlet and a heat outlet, and the waste heat drainage pipe 38 is communicated with the heat inlet. The two ends of the heat exchange cylinder 61 in the length direction are respectively provided with a water inlet and a water outlet, the heat exchange tube 62 is positioned in the heat exchange cylinder 61, and the two ends of the heat exchange tube are positioned in the water inlet and the water outlet. The water inlet is used for supplying cold water to the heat exchange pipe 62, and the water outlet is communicated with a domestic water pipe 63.

Referring to fig. 9, in the process of treating the exhaust gas, the size of the second damper is adjusted, so that a part of the exhaust gas containing heat enters the waste heat drain pipe 38 (refer to fig. 1), and the waste heat drain pipe 38 introduces the exhaust gas into the heat exchange cylinder 61. Meanwhile, cold water is pumped into the heat exchange tube 62 by workers, the cold water exchanges heat with heat of tail gas in the heat exchange tube 61 to form hot water, and the hot water flows into the domestic water tube 63 through the water outlet to supply domestic water, so that the waste heat utilization range of the tail gas is enlarged.

Referring to fig. 9, the exhaust gas after heat exchange in the heat exchange cylinder 61 flows out of the heat exchange cylinder 61 through the heat outlet, a transition pipe 64 (refer to fig. 1) is communicated between the heat outlet and the dust removal tower 31 in order to prevent acidic substances in the exhaust gas from polluting the environment, and a gas path check valve 65 (refer to fig. 1) is arranged on the transition pipe 64.

The specific implementation process comprises the following steps:

the staff puts into milling device 1 with accumulational waste coal slime, and squeeze roll 12 and the section roller 13 in milling device 1 cooperate jointly for the coal slime is the regular slice and falls on belt conveyor line 4. Coal slime enters the drying box 21 after being conveyed by the belt conveying line 4. Meanwhile, heat generated by the burner 22 enters the drying box 21 through the flame inlet pipe 221, and the heat is matched with the first infrared transmitting pipe 27, the second infrared transmitting pipe 28 and the third infrared transmitting pipe 29 together, so that the coal slime is dried, and the dried coal slime is conveyed out of the drying box 21 through the third conveying line 26.

In the process of drying the coal slime in the drying box 21, evaporated moisture of the coal slime can generate high-temperature waste gas together with high-temperature heat from the combustor 22, at the moment, the induced draft fan 23 can absorb the high-temperature waste gas, and in the absorbed high-temperature tail gas, a part of the waste gas enters the combustor 22 through the waste heat recovery pipe 37, so that dyes required by combustion of the combustor 22 are saved; a part of waste gas enters the heat exchanger 6 through the waste heat drainage pipe 38 to exchange heat with cold water, so that the heat utilization of the waste gas is realized; finally, most of the waste gas enters the dust removal tower 31 to realize self desulfurization and temperature reduction, so that the discharged gas meets the emission standard.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a coal slime drying system which characterized in that: comprises a crushing device (1), a drying device (2) and a tail gas treatment device (3);

the crushing device (1) comprises a blanking hopper (11), a squeezing roller (12) and a slicing roller (13), wherein the squeezing roller (12) is rotationally connected in the blanking hopper (11), two cutter targets (122) are arranged along the horizontal direction, the cutter targets (122) are arranged on the squeezing rollers (12), the cutter targets (122) on the two squeezing rollers (12) are arranged in a staggered manner, the slicing roller (13) is rotationally connected in the blanking hopper (11), and is positioned below the extrusion roller (12), the slicing rollers (13) are provided with two along the horizontal direction, one of the slicing rollers (13) is provided with a cutter (131) along the length direction thereof, the other slicing roller (13) is provided with a notch (132) engaged with the cutter (131), a first driving motor (121) for driving the squeezing roller (12) to rotate and a second driving motor (133) for driving the slicing roller (13) to rotate are arranged outside the blanking hopper (11);

the bottom of blanking fill (11) is opened there is the blanking mouth, the below of blanking mouth is equipped with belt conveyor line (4), drying device (2) are including stoving case (21), combustor (22) and draught fan (23), open one side of stoving case (21) has feed inlet (211), it has discharge gate (212) to open for one side of feed inlet (211) stoving case (21), belt conveyor line (4) are kept away from the one end of blanking fill (11) and are passed through feed inlet (211) and stretch into in stoving case (21), by last horizontally first transfer chain (24), second transfer chain (25) and third transfer chain (26) of being equipped with in proper order in stoving case (21), stoving case (21) are equipped with third driving motor (241) that are used for driving first transfer chain (24), second transfer chain (25) and third transfer chain (26) motion outward, A fourth driving motor (251) and a fifth driving motor (261), the transport directions of the first conveyor line (24), the second conveyor line (25) and the third conveyor line (26) are sequentially and alternately arranged, one end of the first conveying line (24) close to the feeding hole (211) is positioned below the belt conveying line (4), one end of the third conveying line (26) far away from the feeding hole (211) extends out of the discharging hole (212), the burner (22) and the induced draft fan (23) are arranged on the ground, the top side of the drying box (21) is communicated with a flame inlet pipe (221), one side of the drying box (21) opposite to the flame inlet pipe (221) is communicated with an air exhaust pipe (222), one end of the flame inlet pipe (221) far away from the drying box (21) is communicated with a flame outlet of the burner (22), one end of the air pulling pipe (222), which is far away from the drying box (21), is communicated with an air inlet of the induced draft fan (23);

an air outlet of the induced draft fan (23) is communicated with a tail gas conveying pipe (32), the tail gas treatment device (3) comprises a dust removal tower (31), the tail gas conveying pipe (32) is communicated with the side wall of the dust removing tower (31), the top surface of the dust removing tower (31) is communicated with an output chimney (33), the bottom surface is communicated with a feed opening, the bottom of the dust removing tower (31) is fixedly connected with a water storage tank (34), the water storage tank (34) is communicated with a feed opening, the water storage tank (34) is filled with water solution, the top of the dust removing tower (31) is provided with a plurality of atomizing nozzles (351) for spraying tail gas, a water suction pump (36) is arranged on the water storage tank (34), a liquid inlet pipe (361) is communicated between a water inlet of the water suction pump (36) and the water storage tank (34), the water outlet of the water pump (36) is communicated with a liquid outlet pipe (362), and the liquid outlet pipe (362) is communicated with the atomizing spray head (351).

2. The coal slime drying system of claim 1, wherein: the flame inlet pipes (221) are uniformly distributed with at least three pipes along the length direction of the drying box (21), and the exhaust pipes (222) are uniformly distributed with at least three pipes along the length direction of the drying box (21).

3. The coal slime drying system of claim 1, wherein: the tail gas conveying pipe (32) is connected with a waste heat recovery pipe (37) in parallel, a first air adjusting door used for adjusting air inflow is arranged in the waste heat recovery pipe (37), and one end, far away from the tail gas conveying pipe (32), of the waste heat recovery pipe (37) is communicated with a flame outlet of the combustor (22).

4. The coal slime drying system of claim 1, wherein: the tail gas conveyer pipe (32) is gone up the parallel connection and has had a waste heat drainage tube (38), be equipped with the second air damper that is used for adjusting the air input in waste heat drainage tube (38), the one end intercommunication that tail gas conveyer pipe (32) was kept away from in waste heat drainage tube (38) has heat exchanger (6), heat exchanger (6) are including heat transfer section of thick bamboo (61) and heat exchange tube (62), water inlet and delivery port have been opened respectively to heat transfer section of thick bamboo (61) length direction's both ends, heat exchange tube (62) are located heat transfer section of thick bamboo (61), the both ends of heat exchange tube (62) are located water inlet and delivery port, the water inlet is used for supplying cold water towards heat exchange tube (62), the delivery port intercommunication has domestic water pipe (63), relative division has into heat mouth and play heat mouth on the stack shell of heat transfer section of thick bamboo (61), waste heat drainage tube.

5. The coal slime drying system of claim 1, wherein: wear to be equipped with a plurality of vibrting spears (5) in first transfer chain (24), second transfer chain (25) and third transfer chain (26) respectively, the vertical vibration groove (51) that are used for holding vibrting spear (5) of opening respectively of lateral wall of stoving case (21) perpendicular to vibrting spear (5), the vibration groove (51) of both sides are worn out at the both ends of vibrting spear (5), the top of vibration groove (51) is equipped with backup pad (52), the lateral wall of backup pad (52) fixed connection stoving case (21), slide on backup pad (52) and wear to be equipped with connecting rod (53), bottom fixed connection vibrting spear (5) of connecting rod (53), press from both sides between vibrting spear (5) and backup pad (52) and be equipped with pressure spring (54) repeatedly, pressure spring (54) cover is established on connecting rod (53) repeatedly, the below of vibration groove (51) is equipped with, dwang (55) rotate to be connected in the lateral wall of stoving case (21), fixed cover is equipped with vibration cam (56) on dwang (55), vibrting spear (5) are contradicted on vibration cam (56), the lateral wall of stoving case (21) is connected with and is used for driving dwang (55) pivoted sixth driving motor (59).

6. The coal slime drying system of claim 1, wherein: the roller body of the squeeze roller (12) is provided with a mounting hole coaxial with the knife target (122), a locking bolt (123) penetrates through the mounting hole, and the locking bolt (123) is in threaded connection with the knife target (122).

7. The coal slime drying system of claim 1, wherein: the top of first transfer chain (24) and be equipped with first infrared emission pipe (27) of a plurality of along its length direction, the below of first transfer chain (24) and be equipped with a plurality of second infrared emission pipe (28) along its length direction, the below of second transfer chain (25) and be equipped with a plurality of third infrared emission pipe (29) along its length direction, first infrared emission pipe (27), second infrared emission pipe (28), third infrared emission pipe (29) fixed connection are in the inside wall of stoving case (21).

8. The coal slime drying system of claim 7, wherein: the power of the first infrared transmitting tube (27), the second infrared transmitting tube (28) and the third infrared transmitting tube (29) is gradually reduced.

9. The coal slime drying system of claim 1, wherein: the water solution is alkaline, and the outer side wall of the water storage tank is provided with an adding port.