CN115388638A - Wet material drying system - Google Patents

Wet material drying system Download PDF

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Publication number
CN115388638A
CN115388638A CN202211027373.9A CN202211027373A CN115388638A CN 115388638 A CN115388638 A CN 115388638A CN 202211027373 A CN202211027373 A CN 202211027373A CN 115388638 A CN115388638 A CN 115388638A
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China
Prior art keywords
rotary dryer
steam
discharging
feeding
screw conveyor
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Pending
Application number
CN202211027373.9A
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Chinese (zh)
Inventor
司欢欢
张万尧
孙中心
徐澍
窦岩
李盈海
董富荣
何德强
谭永鹏
王天宝
张卫利
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Tianhua Institute of Chemical Machinery and Automation Co Ltd
Tianhua Institute Nanjing Intelligent Manufacturing Co ltd
Original Assignee
Tianhua Institute of Chemical Machinery and Automation Co Ltd
Tianhua Institute Nanjing Intelligent Manufacturing Co ltd
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Application filed by Tianhua Institute of Chemical Machinery and Automation Co Ltd, Tianhua Institute Nanjing Intelligent Manufacturing Co ltd filed Critical Tianhua Institute of Chemical Machinery and Automation Co Ltd
Priority to CN202211027373.9A priority Critical patent/CN115388638A/en
Publication of CN115388638A publication Critical patent/CN115388638A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/005—Drying-steam generating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention discloses a wet material drying system, which belongs to the technical field of drying equipment and comprises a steam rotary dryer, a feeding device connected with a feeding hole of the steam rotary dryer, a discharging device connected with a discharging hole of the steam rotary dryer and a washing tower communicated with an exhaust hole of the steam rotary dryer, wherein a high-temperature carrier gas air supply chamber communicated with a feeding cavity of the steam rotary dryer is arranged on the steam rotary dryer, the high-temperature carrier gas air supply chamber is communicated with the washing tower through a circulating fan, and a heating device is arranged between the circulating fan and a high-temperature carrier gas air supply pipe. Through adopting circulation high temperature carrier gas direct heating to cooperate with the dry method of steam pipe steam intermittent type heating, heat utilization rate is high, and the rate of heating and drying is fast, can transition viscidity phase fast, and high temperature carrier gas blows along carrying the cavity simultaneously, still can blow down a small amount of adhesion material on the steam heat exchange tube, reduces the clearance number of times, and high temperature carrier gas can also carry vapor together to take out when discharging for the discharge of vapor.

Description

Wet material drying system
Technical Field
The invention relates to the technical field of drying equipment, in particular to a wet material drying system.
Background
The coal gasification technology is a leading technology and a core technology of the coal chemical industry, and residue discharged after coal gasification treatment has higher carbon content, generally more than 20 percent, even more than 40 percent and higher heat value, so if the residue is directly buried according to the existing solid waste treatment mode, precious carbon sources are wasted, a large amount of land resources are occupied, the local water quality and geological environment are influenced, and the environment is influenced in the transportation process. However, the residue after gasification belongs to wet materials and can be utilized only after dehydration, and the carbon component in the residue after gasification has high porosity, and even after centrifugal dehydration, the water content of the residue is still about 50-60%, so the residue after centrifugal dehydration needs to be dried and dehydrated to enable the residue to reach the standard of resource utilization.
At present, the wet material residue is dried mainly by a steam pipe rotary dryer, for example, the patent number is '201410341724.2', the patent name is 'a drying method of a sludge steam pipe rotary dryer', a drying system special for drying wet materials is disclosed, the drying system comprises the steam pipe rotary dryer, a hot water tank, a spray washing tower, an induced draft fan and a hot water pump, the hot water pump is connected with a liquid outlet end of a steam heat exchange pipe in the steam pipe rotary dryer, the spray washing tower is communicated with an exhaust port of the steam pipe rotary dryer, a heat exchange pipeline communicated with the exhaust port of the spray washing tower is additionally arranged in a condenser on the spray washing tower, and tail gas is exhausted by the heat exchange pipeline. Wet material residues (gasified slag or sludge) are fed into a feeding chamber of a steam pipe rotary dryer through a feeding hole, the wet material is conveyed to a discharging hole under the action of a spiral conveying mechanism, then a high-temperature steam heat exchange pipe is heated to dry the wet material, the dried slag material can be discharged from the discharging hole of the steam pipe rotary dryer, steam after heat exchange is changed into liquid to be discharged from the liquid outlet end of the steam heat exchange pipe, gas formed by mixing steam generated by heating and evaporating in the wet material and air can be fed into a spray washing tower through an exhaust hole to be purified and dedusted, and simultaneously, under the spraying action of the spray tower, the high-temperature tail gas is cooled, the steam in the tail gas is condensed into water drops to fall into a washing tower bottom circulating pool along with the spray liquid to be circularly sprayed, and then the tail gas after purification, dedusting and drying is discharged outside after passing through a condenser. However, because the gasified slag has the characteristics of high carbon content, large ash content and the like, the gasified slag with the water content of 50-60% also has better fluidity, and the wet content has higher cohesiveness under the condition of 45-55%, so that the wet material is easily adhered to a steam heat exchange tube in a conveying chamber along with gradual drying in a steam tube rotary dryer, the heating efficiency is reduced, and the cleaning interval is obviously accelerated to improve the cleaning cost.
Disclosure of Invention
The invention aims to solve the technical problems and provides a wet material drying system which can be widely applied to drying various wet materials such as residues or sludge after coal gasification, and the like, and the system adopts a method of directly heating by circulating high-temperature carrier gas and intermittently heating and drying by steam in a steam pipe, so that the heat utilization rate is high, the treatment capacity is large, the heating and drying speed is high, the viscous period can be quickly transited, the wet materials are prevented from being adhered to a steam heat exchange pipe in a conveying cavity, meanwhile, the high-temperature carrier gas blows along the conveying cavity, a small amount of dry materials adhered to the steam heat exchange pipe can be blown down, the heating efficiency of the steam heat exchange pipe is prevented from being influenced, the cleaning times are reduced, and in addition, when the high-temperature carrier gas is discharged from a steam rotary dryer, the high-temperature carrier gas can wrap the wet materials to evaporate to carry out steam together, and the discharge of the steam is accelerated.
In order to achieve the purpose, the invention provides the following scheme: the invention discloses a wet material drying system which comprises a steam rotary dryer, a feeding device connected with a feeding hole of the steam rotary dryer, a discharging device connected with a discharging hole of the steam rotary dryer and a washing tower communicated with an exhaust hole of the steam rotary dryer, wherein a high-temperature carrier gas air supply chamber communicated with a feeding cavity of the steam rotary dryer is arranged on the steam rotary dryer, the high-temperature carrier gas air supply chamber is close to the feeding hole of the steam rotary dryer, the high-temperature carrier gas air supply chamber is communicated with the washing tower through a circulating fan, and a heating device is arranged between the circulating fan and a high-temperature carrier gas air supply pipe.
Preferably, a cyclone dust collector and a bag-type dust collector are sequentially arranged between the exhaust port of the steam rotary dryer and the washing tower.
Preferably, the washing column is a tray column, a packed column or a spray column.
Preferably, the heating means comprises an air heater.
Preferably, material feeding unit includes the buffer storehouse, buffer storehouse bottom portion is equipped with to the bottom screw conveyer of feed inlet pay-off of steam rotary dryer.
Preferably, the discharging device comprises a discharging screw conveyor, a discharging screw conveyor discharging port and a discharging screw conveyor feeding port communicated with a discharging port of the steam rotary dryer are arranged on the discharging screw conveyor, and a cooling screw conveyor for discharging dried slag is arranged below the discharging port of the discharging screw conveyor.
Preferably, the bottom of the storehouse screw conveyer with still be equipped with between the feed inlet of steam rotary dryer and mix the machine, be equipped with on the machine that mixes first feed inlet, mix machine second feed inlet and with the machine discharge gate that mixes of steam rotary dryer's feed inlet intercommunication mixes, it is located to mix the machine second feed inlet mix first feed inlet with mix between the machine discharge gate, still be equipped with ejection of compact screw conveyer on the ejection of compact screw conveyer and return the material mouth, ejection of compact screw conveyer return the material mouth through the returning charge device to mix the pay-off of machine second feed inlet.
Preferably, the material returning device comprises a first-stage material returning belt conveyor and a second-stage material returning belt conveyor, the feed end of the first-stage material returning belt conveyor is communicated with the material returning opening of the discharging screw conveyor, the discharge end of the first-stage material returning belt conveyor is communicated with the feed end of the second-stage material returning belt conveyor, and the discharge end of the second-stage material returning belt conveyor is communicated with the second feed opening of the mixing machine.
Preferably, a liquid outlet of a steam heat exchange tube in the feeding cavity of the steam rotary dryer is connected with a hot water tank, and the steam heat exchange tube is connected with a high-temperature steam system.
Preferably, a hot water pump for supplying hot water to the outside is arranged on the hot water tank.
Compared with the prior art, the invention has the following technical effects:
1. in the wet material drying system, the high-temperature carrier gas air supply chamber is arranged on the steam rotary dryer and is communicated with the washing tower through the circulating fan, the tail gas treated by the steam rotary dryer is heated by the heating device and is sent back to the high-temperature carrier gas air supply chamber, the tail gas which is originally discharged can be used as high-temperature carrier gas to directly heat the wet material fed into the steam rotary dryer, the drying speed of the wet material can be greatly improved by matching with the indirect heating of the steam heat exchange tube in the steam rotary dryer, so that the viscosity period of the wet material is quickly delayed, the adhesion to a spiral conveying mechanism is avoided, the high-temperature carrier gas can be blown down along the axial direction of the feeding chamber, the adhesion amount of the dry material adhered to the spiral conveying mechanism can be reduced, the cleaning times are reduced, and the high-temperature carrier gas can be carried along with the water vapor evaporated from the wet material when being discharged from the steam rotary dryer, and the discharge of the water vapor is accelerated.
2. In the wet material drying system, the mixer is arranged between the buffer storage bin and the steam rotary dryer, high-temperature materials which are dried and not cooled can be fed into the mixer through the material returning device and mixed with wet materials fed into the buffer storage bin, preheating and pre-dehumidifying effects can be formed, the moisture content at the inlet of the dryer is reduced, the viscosity of the materials is reduced, the subsequent heating and drying speed is accelerated, certain viscosity can be reduced by mixing the dried materials with the wet materials, and the materials are prevented from being adhered to a spiral conveying mechanism in the steam rotary dryer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a wet material drying system;
FIG. 2 is a schematic view of the structure of a feeding device of the wet material drying system;
FIG. 3 is a schematic view of the structure of the discharging device of the wet material drying system;
fig. 4 is a schematic diagram of the structure at the scrubber tower of the wet goods drying system.
Description of reference numerals: 1. a cache bin; 2. a bin bottom screw conveyor; 3. a mixer; 4. a steam rotary dryer; 5. a discharge screw conveyor; 6. cooling the screw conveyor; 7. a primary material returning belt conveyor; 8. a secondary material returning belt conveyor; 9. a cyclone dust collector; 10. a bag-type dust collector; 11. a washing tower; 12. a water circulating pump; 13. a condenser; 14. a circulating fan; 15. an air heater; 16. a hot water tank; 17. a hot water pump; 18. a feed inlet of the steam rotary dryer; 19. a discharge port of the steam rotary dryer; 20. a high-temperature carrier gas air supply chamber; 21. an exhaust port of the steam rotary dryer; 22. a liquid outlet of the steam heat exchange pipe; 23. an air inlet of the steam rotary dryer; 24. a discharge port of the discharge screw conveyor; 25. a material returning port of the discharging screw conveyor; 26. cooling the water inlet of the screw conveyor; 27. cooling the water outlet of the screw conveyor; 28. a mixer first feed port; 29. a second feed port of the mixer; 30. and (4) discharging the mixer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a wet material drying system which can be widely applied to drying of various wet materials, such as residues or sludge after coal gasification. As shown in fig. 1 to 4, the steam rotary dryer comprises a feeding device, a discharging device, a heating device, a steam rotary dryer 4, a washing tower 11 and a circulating fan 14, wherein the feeding device is connected with a feeding hole 18 of the steam rotary dryer at the top of the head end of the steam rotary dryer 4, the discharging device is connected with a discharging hole 19 of the steam rotary dryer at the bottom of the tail end of the steam rotary dryer 4, and the washing tower 11 is connected with an exhaust port 21 of the steam rotary dryer at the top of the tail end of the steam rotary dryer 4. The high-temperature carrier gas air supply chamber 20 is arranged at the position, close to the feed inlet 18 of the steam rotary dryer 4, of the head end of the steam rotary dryer 4, the high-temperature carrier gas air supply chamber 20 is communicated with the feed chamber of the steam rotary dryer 4, the tail gas discharge port of the washing tower 11 is communicated with the high-temperature carrier gas air supply chamber 20 through a circulating fan 14, and the heating device is arranged on a pipeline between the circulating fan 14 and the high-temperature carrier gas air supply chamber 20.
The working principle is as follows, taking the wet gasified slag as an example:
firstly, feeding wet slag materials with the moisture content of 50-60% from a centrifuge into a feeding cavity of a steam rotary dryer 4 through a feeding hole 18 of the steam rotary dryer by a feeding device, and conveying the wet slag materials to move towards a discharging hole 19 of the steam rotary dryer by a spiral conveying mechanism in the feeding cavity;
then, introducing low-pressure high-temperature steam of 145-175 ℃ into a steam heat exchange pipe in the steam rotary dryer 4 through a steam rotary dryer air inlet 23, feeding 125-150 ℃ high-temperature carrier gas into a feeding chamber through a high-temperature carrier gas air feeding chamber 20, wherein the steam heat exchange pipe can indirectly heat wet materials in the feeding chamber, the high-temperature carrier gas can move along the axial direction of the feeding chamber to the tail end of the steam rotary dryer 4 and directly heat the wet materials in the feeding chamber, so that on one hand, the drying of the wet materials can be accelerated, the viscosity of the wet materials can be reduced, on the other hand, less materials adhered to a bolt conveying mechanism can be blown down under the blowing of the high-temperature carrier gas, the wet materials are prevented from being adhered to the spiral conveying mechanism, and meanwhile, water vapor evaporated from the heated wet materials is wrapped by the high-temperature carrier gas and can be better discharged from an exhaust port 21 of the steam rotary dryer and enters a washing tower 11 for dedusting and purification;
finally, dried 85-95 ℃ dry materials are discharged from a discharge port 19 of a steam rotary dryer, steam condensate after heat exchange in a steam heat exchange pipe is discharged through a liquid outlet 22 of the steam heat exchange pipe, the high-temperature tail gas enters a washing tower 11, the temperature of the high-temperature tail gas is rapidly reduced in the process of dedusting and purifying low-temperature liquid sprayed by a sprayer, the steam in the high-temperature tail gas is rapidly condensed into liquid drops, the liquid drops fall into a circulating pool at the bottom of the washing tower 11 along with the low-temperature liquid, the tail gas is dried, dedusted and purified, the dried and purified tail gas is discharged through a tail gas discharge port at the top of the washing tower 11 and then is sent into a heating device under the action of a circulating fan 14, high-temperature carrier gas at 125-150 ℃ is formed again under the heating of the heating device and sent into a high-temperature carrier gas air supply chamber 20, the liquid in the circulating pool is sent into a condenser 13 through a circulating water pump 12 to be cooled and then is sent into the sprayer at the top of the washing tower 11 again to be subjected to circulating spraying.
In the embodiment, the heating temperature of the high-temperature circulating carrier gas is 125-150 ℃, the heating temperature of the low-pressure steam is 145-175 ℃, the heat source is mild and is far lower than the natural temperature point of the material, the drying process is safe and reliable, the system configuration is simple, and the equipment investment cost is low.
In this embodiment, as shown in fig. 1 to 4, a cyclone 9 and a bag-type dust collector 10 are sequentially disposed between the exhaust port 21 of the steam rotary dryer and the washing tower 11 to effectively remove dust from the high-temperature exhaust gas.
Further, in the present embodiment, as shown in fig. 1 to 4, the washing tower 11 may be a tray tower, a packed tower or a spray tower, and is preferably a spray tower.
In this embodiment, as shown in fig. 1 to 4, the heating device includes an air heater 15, a vent pipe and a heat exchange pipe are arranged in the air heater 15, an air inlet end and an air outlet end of the vent pipe are respectively communicated with the circulating fan 14 and the high-temperature carrier gas supply chamber 20, the air inlet end and the air outlet end of the heat exchange pipe are used for introducing low-pressure high-temperature steam and discharging steam condensate after heat exchange, and the high-temperature steam in the heat exchange pipe can heat the tail gas in the vent pipe, so as to form high-temperature carrier gas.
In this embodiment, as shown in fig. 1 to 4, the feeding device includes a buffer bin 1, and a bin bottom screw conveyor 2 for feeding to a feeding port 18 of the steam rotary dryer is arranged at the bottom of the buffer bin 1.
As shown in fig. 1 to 4, the discharging device includes a discharging screw conveyor 5 and a cooling screw conveyor 6, the discharging screw conveyor 5 is located below the steam rotary dryer 4, and the cooling screw conveyor 6 is located below the discharging screw conveyor 5. Discharging screw conveyor 5 is provided with a discharging screw conveyor feeding port and a discharging screw conveyor discharging port 24, the discharging screw conveyor feeding port is communicated with a steam rotary dryer discharging port 19, the discharging screw conveyor discharging port 24 is communicated with a cooling screw conveyor 6 feeding end, and the cooling screw conveyor 6 is used for cooling and delivering the dried materials. The shell of the cooling screw conveyor 6 is provided with a jacket or a cooling pipeline, the jacket or the cooling pipeline is provided with a cooling screw conveyor water inlet 26 and a cooling screw conveyor water outlet 27, the cooling screw conveyor water inlet 26 is used for introducing circulating cooling water, and the cooling screw conveyor water outlet 27 is used for discharging the circulating cooling water.
Further, in this embodiment, as shown in fig. 1 to 4, a mixer 3 is further disposed between the bin bottom screw conveyor 2 and the feed inlet 18 of the steam rotary dryer, a mixer first feed inlet 28, a mixer second feed inlet 29 and a mixer discharge outlet 30 are disposed on the mixer 3, and the mixer second feed inlet 29 is disposed between the mixer first feed inlet 28 and the mixer discharge outlet 30. The mixer first feed port 28 is located below the bin bottom screw conveyor 2 and is in communication with the discharge end of the bin bottom screw conveyor 2, and the mixer discharge port 30 is located above and is in communication with the steam rotary dryer feed port 18. The discharging screw conveyor 5 is also provided with a material returning port 25 of the discharging screw conveyor, and the material returning port 25 of the discharging screw conveyor feeds materials to the second feeding port 29 of the mixing machine through a material returning device. Discharging screw conveyor 5 sends most high temperature dry material to cooling screw conveyor 6 and cools off and arrange outward, and the remainder then sends to in mixing machine second feed inlet 29 through discharging screw conveyor material returning mouth 25 and material returning device for send into with mixing machine first feed inlet 28 and mix the interior wet material of machine 3 and mix, dry and preheat the wet material tentatively. If the wet slag material with the moisture content of 50-60% discharged from the buffer bin 1 enters the mixer 3 to be mixed with the returned hot dry material, the moisture content can be reduced to 35-45%.
In this embodiment, as shown in fig. 1 to 4, the material returning device includes a first-stage material returning belt conveyor 7 and a second-stage material returning belt conveyor 8, the feed end of the first-stage material returning belt conveyor 7 is communicated with the material returning port 25 of the discharge screw conveyor, the discharge end of the first-stage material returning belt conveyor 7 is communicated with the feed end of the second-stage material returning belt conveyor 8, and the discharge end of the second-stage material returning belt conveyor 8 is communicated with the second feed port 29 of the mixer.
In this embodiment, as shown in fig. 1 to 4, a hot water tank 16 is connected to a vapor heat exchange tube liquid outlet 22 of a vapor heat exchange tube in the feeding chamber of the vapor rotary dryer 4. The steam inlet of the steam heat exchange pipe is connected with a high-temperature steam system, and low-pressure high-temperature steam can be injected into the steam heat exchange pipe through the high-temperature steam system. The discharged liquid may be collected by hot water tank 16 for other use or sent to a high temperature steam system for reuse in a steam cycle.
In the present embodiment, as shown in fig. 1 to 4, a hot water pump 17 for supplying hot water to the outside is provided to the hot water tank 16.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.

Claims (10)

1. The wet material drying system is characterized by comprising a steam rotary dryer, a feeding device connected with a feeding hole of the steam rotary dryer, a discharging device connected with a discharging hole of the steam rotary dryer and a washing tower communicated with an exhaust hole of the steam rotary dryer, wherein a high-temperature carrier gas air supply chamber communicated with a feeding cavity of the steam rotary dryer is arranged on the steam rotary dryer, the high-temperature carrier gas air supply chamber is close to the feeding hole of the steam rotary dryer, the high-temperature carrier gas air supply chamber is communicated with the washing tower through a circulating fan, and a heating device is arranged between the circulating fan and a high-temperature carrier gas air supply pipe.
2. The wet material drying system according to claim 1, wherein a cyclone dust collector and a bag-type dust collector are sequentially arranged between the exhaust port of the steam rotary dryer and the washing tower.
3. The wet material drying system according to claim 2, wherein the washing tower is a tray tower, a packed tower or a spray tower.
4. The wet material drying system of claim 1, wherein said heating means comprises an air heater.
5. The wet material drying system according to claim 1, wherein the feeding device comprises a buffer bin, and a bin bottom screw conveyor for feeding materials to a feeding hole of the steam rotary dryer is arranged at the bottom of the buffer bin.
6. The wet material drying system according to claim 5, wherein the discharging device comprises a discharging screw conveyor, a discharging screw conveyor discharging port and a discharging screw conveyor feeding port communicated with a discharging port of the steam rotary dryer are arranged on the discharging screw conveyor, and a cooling screw conveyor for discharging dried slag is arranged below the discharging port of the discharging screw conveyor.
7. The wet material drying system according to claim 6, wherein a mixer is further arranged between the bin bottom screw conveyor and the feed inlet of the steam rotary dryer, a first feed inlet of the mixer, a second feed inlet of the mixer and a discharge outlet of the mixer communicated with the feed inlet of the steam rotary dryer are arranged on the mixer, the second feed inlet of the mixer is located between the first feed inlet of the mixer and the discharge outlet of the mixer, a return port of the discharge screw conveyor is further arranged on the discharge screw conveyor, and the return port of the discharge screw conveyor feeds materials to the second feed inlet of the mixer through a return device.
8. The wet material drying system according to claim 7, wherein the material returning device comprises a first-stage material returning belt conveyor and a second-stage material returning belt conveyor, the feeding end of the first-stage material returning belt conveyor is communicated with the material returning opening of the discharging screw conveyor, the discharging end of the first-stage material returning belt conveyor is communicated with the feeding end of the second-stage material returning belt conveyor, and the discharging end of the second-stage material returning belt conveyor is communicated with the second feeding opening of the mixer.
9. The wet material drying system according to claim 1, wherein a hot water tank is connected to a liquid outlet of a steam heat exchange pipe in the feeding chamber of the steam rotary dryer, and the steam heat exchange pipe is connected with a high-temperature steam system.
10. The wet material drying system according to claim 9, wherein a hot water pump for supplying hot water to the outside is provided on the hot water tank.
CN202211027373.9A 2022-08-25 2022-08-25 Wet material drying system Pending CN115388638A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940937A (en) * 2017-12-19 2018-04-20 北京中矿环保科技股份有限公司 Coal slime contact drying system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6709438A (en) * 1966-07-12 1968-01-15
CN104140187A (en) * 2014-07-18 2014-11-12 天华化工机械及自动化研究设计院有限公司 Drying method for sludge steam pipe rotary drying machine
CN113880470A (en) * 2021-09-30 2022-01-04 泰安路发节能环保设备有限公司 Novel process and equipment for producing building gypsum
CN216522958U (en) * 2021-11-25 2022-05-13 天华化工机械及自动化研究设计院有限公司 Polyphenylene oxide closed nitrogen circulation steam pipe rotary drying and solvent recovery system
CN114754564A (en) * 2022-05-13 2022-07-15 江苏格兰特干燥浓缩设备有限公司 Low-energy-consumption tube bundle drying machine and using method thereof
CN218349175U (en) * 2022-08-25 2023-01-20 天华化工机械及自动化研究设计院有限公司 Wet material drying system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6709438A (en) * 1966-07-12 1968-01-15
GB1127267A (en) * 1966-07-12 1968-09-18 Ludin Werner Process and apparatus for drying sludge such as sewage sludge
CN104140187A (en) * 2014-07-18 2014-11-12 天华化工机械及自动化研究设计院有限公司 Drying method for sludge steam pipe rotary drying machine
CN113880470A (en) * 2021-09-30 2022-01-04 泰安路发节能环保设备有限公司 Novel process and equipment for producing building gypsum
CN216522958U (en) * 2021-11-25 2022-05-13 天华化工机械及自动化研究设计院有限公司 Polyphenylene oxide closed nitrogen circulation steam pipe rotary drying and solvent recovery system
CN114754564A (en) * 2022-05-13 2022-07-15 江苏格兰特干燥浓缩设备有限公司 Low-energy-consumption tube bundle drying machine and using method thereof
CN218349175U (en) * 2022-08-25 2023-01-20 天华化工机械及自动化研究设计院有限公司 Wet material drying system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940937A (en) * 2017-12-19 2018-04-20 北京中矿环保科技股份有限公司 Coal slime contact drying system
CN107940937B (en) * 2017-12-19 2023-04-18 光大清洁技术股份有限公司 Indirect drying system of coal slime

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