CN217844636U - Scraper type dryer for drying lignite - Google Patents

Abstract

The application provides a scraper type desiccator for dry brown coal, it will wait that dry brown coal to stand on this internal diapire of desiccator to set up the scraper belt, and scrape brown coal to go out the motion of feed bin direction, the heating medium that flows in the heating chamber is with the brown coal heated drying on the inner diapire, brown coal is transported to out the feed bin from the feed inlet, reentrant this internal of desiccator on lower floor, repeat the above-mentioned process, dry brown coal, the scraper type desiccator for dry brown coal of this application, in brown coal drying process, drying medium not with brown coal direct contact, therefore avoided in the traditional drum-type drying mode, hot-blast direct and brown coal contact are dry with brown coal, lead to the brown coal spontaneous combustion easily, even the explosion phenomenon, in addition this application desiccator a plurality of piles up the setting, can promote drying effect, and pile up the mode area that sets up little, and the desiccator of this application, the heating chamber on upper strata and the heating chamber of lower floor independently work, therefore can carry out different temperature drying to brown coal with the energy saving.

Description

Scraper type dryer for drying lignite

Technical Field

The application relates to the technical field of dryers, in particular to a scraper type dryer for drying lignite.

Background

Coal is an important energy source which can be directly used as fuel and is also an important source of chemical industrial raw materials, because high-quality coal is almost mined out, lignite has become the main coal used in China, and because lignite is rich in volatile matters, lignite is easy to burn and smoke. Lignite has carbon content of 60-77%, great water content of 15-60%, high volatile component content of 40% and free humic acid. Therefore, the lignite can have better utilization value only after being upgraded; the moisture of the lignite is reduced, and the main approach for upgrading the lignite is provided.

There are various methods for drying lignite, among which drum-type lignite dryers are the usual drying equipment. A heat source of a common roller dryer is a hot blast stove, high-temperature hot air of 500-700 ℃ is used as a drying medium, the hot air is directly contacted with lignite to dry the lignite, and in the drying mode, the hot air can contain a large amount of oxygen, so that the spontaneous combustion and even explosion of the lignite can be easily caused.

SUMMERY OF THE UTILITY MODEL

The application provides a scraper type drying machine for drying lignite, which is used for solving the problem that when the existing rotary drum type drying machine is used for drying lignite, hot air is directly contacted with the lignite as a heat exchange medium, so that the lignite is easy to spontaneously combust.

The application provides a scraper type dryer for drying lignite, which comprises a plurality of dryer bodies arranged in a stacked mode;

a feed inlet is formed in one side of the top of the dryer body;

a discharging bin is arranged on one side of the bottom of the dryer body, which is far away from the feeding hole;

a heating cavity is arranged at the bottom of the dryer body, a heating medium inlet is formed in one end, away from the feeding hole, of the heating cavity, and a heating medium outlet is formed in one end, close to the feeding hole, of the heating cavity;

a scraper device is arranged in the dryer body and comprises a driving wheel, a driven wheel and a scraper belt, and the scraper belt is sleeved on the driving wheel and the driven wheel;

the driving wheel is arranged on one side close to the feeding hole and is connected with a motor outside the dryer body through a first rotating shaft, and the first rotating shaft penetrates through the dryer body;

the driven wheel is arranged on one side close to the discharging bin and is connected with a second rotating shaft penetrating through the dryer body;

in two adjacent drier bodies, the discharge bin of the last drier body is butted with the feed inlet of the next drier body;

the top of the dryer body positioned on the uppermost layer is provided with an exhaust port.

Optionally, the scraper belt comprises a chain and a plurality of scrapers welded on two sides of the chain, and the driving wheel and the driven wheel are gears;

the chain and the driving wheel are connected with the driven wheel in a meshing manner.

Optionally, the scrapers include a flat scraper and a comb-tooth scraper, and the flat scraper and the comb-tooth scraper are adjacently arranged on the same side of the chain.

Optionally, the lower end of the scraper extends out of a chain for scraping the lignite.

Optionally, the vent is connected to a gas filter.

Optionally, the gas filter comprises a gas filter body, a gas inlet, a gas outlet, a water outlet and a filter element;

the air inlet is arranged at the lower part of one side of the filter body, the upper part of one side of the air outlet, the water outlet is arranged at the bottom of the filter body, and the filter element is filled in the filter body; the bottom of the filter body is in an inverted cone shape.

Optionally, a wear-resisting plate is arranged on the inner bottom wall of the dryer body.

Optionally, the wear plate is tungsten steel or manganese steel.

The application provides a scraper dryer for dry brown coal, it will treat that dry brown coal is spread out on this internal diapire of desiccator even to set up the scraper belt, and scrape brown coal to go out the motion of feed bin direction, the heating medium that flows in the heating chamber is with the brown coal drying on the inner diapire, brown coal can be transported to out the feed inlet, reentrant this internal of desiccator of lower floor, repeat the above-mentioned process, dry brown coal, the scraper dryer for dry brown coal of this application, in the brown coal drying process, drying medium is not with brown coal direct contact, therefore avoided in the traditional drum-type drying mode, hot-blast directness is dry with brown coal contact, lead to the brown coal spontaneous combustion easily, even the explosion phenomenon, in addition this application a plurality of scraper dryer for dry brown coal pile up the setting, can promote drying effect, it is little to pile up the mode area that sets up, and the desiccator of this application, the heating chamber of upper strata and the heating chamber of lower floor independently work, therefore can carry out different temperature drying to brown coal with the energy saving.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic front view of a scraper dryer for drying brown coal according to an embodiment of the present disclosure;

fig. 2 is a schematic top view of a dryer body according to an embodiment of the present disclosure;

fig. 3 is a schematic left side view of a scraper dryer for drying brown coal according to an embodiment of the present application;

FIG. 4 is a schematic top view of a chain according to an embodiment of the present application;

FIG. 5 is a schematic front view of a chain according to an embodiment of the present application;

fig. 6 is a schematic front view of a scraper dryer for drying brown coal according to another embodiment of the present disclosure;

fig. 7 is a schematic front view of a filter according to an embodiment of the present disclosure.

Description of reference numerals:

1. a dryer body;

101. a feed inlet;

102. an exhaust port;

103. a discharging bin;

104. a wear plate;

2. a squeegee assembly;

201. a driving wheel;

202. a driven wheel;

21. a first rotating shaft;

22. a second rotating shaft;

3. a scraper belt;

301. a chain;

302. a squeegee;

3021. a flat scraper;

3022. a comb-tooth type scraper;

4. a heating cavity;

401. a heating medium inlet;

402. a heating medium outlet;

5. a motor;

6. a filter;

601. a filter body;

602. an air inlet;

603. an air outlet;

604. a water outlet;

605. and (3) a filter element.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but 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 application.

As shown in fig. 1 to 3, the present application provides a scraper dryer for drying lignite, comprising a plurality of dryer bodies 1 arranged in a stack, wherein two stacked dryer bodies are illustrated as an example in fig. 1 and 3;

a feeding hole 101 is formed in one side of the top of the dryer body 1;

a discharging bin 103 is arranged on one side of the bottom of the dryer body 1 far away from the feeding hole 101;

a heating cavity 4 is arranged at the bottom of the dryer body 1, a heating medium inlet 401 is formed in one end, away from the feeding hole 101, of the heating cavity 4, and a heating medium outlet 402 is formed in one end, close to the feeding hole 101, of the heating cavity 4;

a scraper device 2 is arranged in the dryer body 1, the scraper device 2 comprises a driving wheel 201, a driven wheel 202 and a scraper belt 3, and the scraper belt 3 is sleeved on the driving wheel 201 and the driven wheel 202;

the driving wheel 201 is arranged at one side close to the feeding hole 101 and is connected with the first motor 5 outside the dryer body 1 through a first rotating shaft 21, and the first rotating shaft 21 penetrates through the dryer body 1;

the driven wheel 202 is arranged at one side close to the discharging bin 103, and the driven wheel 202 is connected with the second rotating shaft 22 penetrating through the dryer body 1;

in two adjacent drier bodies, the discharge bin 103 of the last drier body is butted with the feed inlet 101 of the next drier body;

the top of the dryer body located at the uppermost layer is provided with an air outlet 102. According to the scraper type drying machine for drying the lignite, in use, lignite to be dried is input into the drying machine body 1 from the feeding hole 101, the motor 5 drives the driving wheel 201 to rotate anticlockwise, then the scraper belt 3 sleeved on the driving wheel 201 and the driven wheel 202 is driven to transmit, and the scraper 302 on the scraper belt 3 scrapes the lignite entering the drying machine body 1 and moves towards the direction of the discharging bin 103; meanwhile, a heating medium (such as exhaust steam or hot water) input from a heating medium inlet 401 enters the heating chamber 4, the inner bottom wall of the dryer body 1 is heated, the lignite scraped by the scraper 302 is heated, the moisture of the lignite is evaporated, the lignite is dried, and the heat-exchanged heating medium is output from a heating medium outlet 402. Moreover, there is the space between scraper blade area 3 and the inner bottom wall of dryer body 1, in the process of scraper blade area 3 operation, the wet brown coal (the granularity of pulverized coal is 5 ~ 15 mm) that is input from feed inlet 101 is scraped and is spread evenly into a thin layer on the inner bottom wall of dryer body 1, the brown coal that is spread evenly on the inner bottom wall of dryer body 1 is heated and dried, then the dry brown coal of wet brown coal of input can the adhesion in the process of being scraped by scraper blade area 3, make dry, wet brown coal is in the place ahead of scraper blade area 3 motion accumulation, thereby make dry brown coal also be taken away by scraper blade area 3 from the inner bottom wall of dryer body 1, and then input to the dryer body 1 of next floor. In this application, go out feed bin 103 from last to passing heating chamber 4 down, therefore in the use, the lignite that falls into next floor desiccator body from going out feed bin 103 also can be heated dry in the process through going out feed bin 103 to further promote drying effect.

Dried lignite falls into the dryer body 1 on the lower layer from the discharge bin 103, in the falling process, dry lignite and wet lignite are mixed in the falling process, in the dryer body 1 on the lower layer, the motor 5 drives the driving wheel 201 to move clockwise, the scraper belt 3 sleeved on the driving wheel 201 and the driven wheel 202 is driven to drive, the lignite entering the dryer body 1 is scraped by the scraper belt 3 and moves towards the direction of the discharge bin 103, meanwhile, a heating medium input from the heating medium inlet 401 enters the heating cavity 4, the inner bottom wall of the dryer body 1 is heated, the lignite scraped by the scraper belt 3 is heated, water of the lignite is evaporated, the drying process of the lignite is completed again, and the heating medium after heat exchange is output from the heating medium outlet 402. The dried lignite is scraped and output from the discharging bin 103 at the lower layer.

The steam that dry brown coal produced then discharges from gas vent 102, or gets into gas processing apparatus and purifies the back and discharge, and the steam that a plurality of desiccators body 1 produced passes through the play feed bin 103 of connecting adjacent desiccator body 1, gets into the desiccator body 1 of upper strata in, and so on until discharging from the gas vent 102 of the desiccator body 1 of the top. In the drying process, the traveling route of the lignite to be dried in the upper layer of the dryer body 1 and the lower layer of the dryer body 1 is S-shaped, so that the drying path is prolonged, and the drying effect is improved. In order to further improve the drying effect, the scraper type dryer in the application can be stacked and connected in series for multiple use.

The application provides a scraper type dryer for drying lignite, it will wait that the dry lignite spreads out on the diapire in desiccator body 1 to set up scraper belt 3, and scrape lignite and move to ejection of compact storehouse 103 direction, the heating medium that flows in heating chamber 4 heats the lignite on the diapire, lignite can be transported to ejection of compact storehouse 103 from feed inlet 101, reentrant in the desiccator body 1 of lower floor, repeat the above-mentioned process, dry lignite, the scraper type dryer for drying lignite of this application, in the lignite drying process, drying medium is not with lignite direct contact, therefore in having avoided traditional drum-type drying mode, hot-blast direct and lignite contact are dried with lignite, lead to the lignite spontaneous combustion easily, even the phenomenon of explosion, the scraper type dryer for drying lignite of this application piles up the setting in addition, can promote drying effect, it is little to pile up the mode area that sets up, and the desiccator heat chamber 4 in the desiccator the drier body 1 of lower floor in heating chamber 4 independently work, therefore can carry out different temperature drying to lignite (namely the warm energy in the desiccator heat chamber 4 in the desiccator body 1 of upper strata has the beneficial warm medium to carry out like this drying effect).

As shown in fig. 4, the scraper belt 3 optionally includes a chain 301 and a plurality of scrapers 302 welded to both sides of the chain, and the driving pulley 201 and the driven pulley 202 are gears.

The chain 301 and the driving pulley 201 are connected in a meshing manner with the driven pulley 202.

In this application, scraper blade 3 includes chain 301 and welds a plurality of scraper blade 302 in the chain both sides, has the space between the adjacent scraper blade 302, can make the brown coal leak down from the space after importing into the desiccator body 1 in feed inlet 101.

As shown in FIG. 4, the flights 302 may alternatively include flat flights 3021 and comb flights 3022, with the flat flights 3021 and comb flights 3022 being positioned adjacent to each other on the same side of the chain 301.

In the application, the flat scraper 3021 is used for scraping and transporting the lignite, and the comb-tooth scraper 3022 is used for stirring and mixing the lignite, so that the drying of the lignite is accelerated.

As shown in fig. 5, optionally, a chain 301 extends from the lower end of the scraper 302 for scraping the lignite.

In this application, the chain 301 is extended from the lower end of scraper blade 302, is convenient for scrape the lignite and send, and in a realizable mode, the lower end of comb-tooth scraper blade 3022 is flush with the inner bottom wall of the dryer, so that the lignite can be better stirred, and drying of lignite is promoted.

As shown in fig. 6, the exhaust port 102 is optionally connected to the gas filter 6.

In this application, set up filter 6 and can advance to purify from the steam of 1 output of desiccator body to hold back the moisture in the steam, make the gas of output clean, and can prevent because the solid particle thing that steam brought out can also collect steam and add the centralized processing to the pollution of environment, and the water after being handled can recycle, thereby also has the effect of water economy resource.

As shown in fig. 7, optionally, the gas filter 6 comprises a gas filter body 601, a gas inlet 602, a gas outlet 603, a water outlet 604 and a filter element 605;

an air inlet 602 is arranged at the lower part of one side of the filter body 601, an upper part of one side of an air outlet 603, an water outlet 604 is arranged at the bottom of the filter body 601, and a filter element 605 is filled in the filter body 601; the bottom of the filter body 601 is of an inverted cone shape.

In the application, the filter element is used for filtering the water vapor output from the dryer body 1, filtering and intercepting dust particles and moisture in the water vapor, the intercepted moisture is condensed and gathered at the inverted cone-shaped bottom of the filter 6 in the filter 6 and then is output by the water outlet 604 for centralized processing, and the filtered water vapor is output from the air outlet and discharged into the atmosphere; the filter element 605 may be an asbestos filter element, an activated carbon filter element, or a polytetrafluoroethylene filter element.

As shown in fig. 6, which is illustrated with two stacked dryer bodies, optionally, wear plates 104 are respectively disposed on the inner bottom walls of the upper and lower dryer bodies 1 and 1.

In a possible implementation manner, one end of the wear-resisting plate 104 in the dryer body 1 at the upper layer, which is close to the driving wheel 201, is bent upwards to form an inwards concave arc shape and is tangent to the inner side wall of the dryer body 1; one end, close to the discharge bin 103, of the wear-resistant plate 104 in the dryer body 1 at the lower layer is bent upwards to form an inwards concave arc shape and is tangent to the inner side wall of the dryer body 1.

In this application, set up antifriction plate 104 in the desiccator body 1 of the desiccator body 1 on upper strata and the desiccator body 1 of lower floor respectively, can avoid making the wearing and tearing of brown coal to diapire in the desiccator body 1 because the desiccator uses for a long time. In addition, one end of the wear-resisting plate 104, which is close to the driving wheel 201, is bent upwards to form an inwards concave arc shape and is tangent to the inner side wall of the dryer body 1, and the design can avoid the accumulation of the lignite caused by dead angles formed by the inner bottom wall of the dryer near the feeding hole 101.

Optionally, the wear plate 104 is tungsten steel or manganese steel.

In the application, the wear-resisting plate 104 is made of high-hardness materials such as tungsten steel or manganese steel, and the service life of the wear-resisting plate 104 can be prolonged.

Example (b):

the scraper type dryer for drying the lignite is used, the lignite to be dried is input into the dryer body 1 from the feeding hole 101, the motor 5 drives the driving wheel 201 to rotate, the driving wheel 201 and the scraper belt 3 on the driven wheel 202 are sleeved with the driving wheel, the advancing direction of the scraper belt 3 is the direction from the feeding hole 101 to the discharging bin 103, and the scraper 302 on the scraper belt 3 scrapes lignite entering the dryer body 1 and moves towards the discharging bin 103. When the scraper belt 3 runs, the flat scraper 3021 scrapes the lignite to move forward, and the comb-shaped scraper 3022 is flush with the upper surface of the wear-resistant plate 104 on the inner bottom of the dryer body 1, so that the lignite is stirred.

Because the wear-resisting plate 104 is arranged on the inner bottom wall of the dryer body 1, one end, close to the driving wheel 201, of the wear-resisting plate 104 is bent upwards to form an inwards concave arc shape and is tangent to the inner side wall of the dryer body 1, the situation that no dead angle exists on one side wall, close to the driving wheel 201, in the dryer body 1 can be avoided, the lignite is prevented from being accumulated at the dead angle, and the wear-resisting plate 104 can also prevent the inner bottom wall of the dryer body 1 from being worn due to long-term use of the dryer; meanwhile, a heating medium (such as exhaust steam, hot air or hot water) input from a heating medium inlet 401 enters the heating chamber 4 to heat the inner bottom wall of the dryer body 1, so as to heat the lignite to evaporate water, thereby achieving the effect of drying the lignite, the heating medium after heat exchange is output from a heating medium outlet 402, the dried lignite is output from the discharging bin 103 to the dryer body 1 on the lower layer, and the drying process of the lignite in the dryer body 1 on the lower layer is the same as the drying process in the dryer body 1 on the upper layer.

The steam evaporated by the lignite after being dried is output from the exhaust port 102, and the steam generated by the plurality of drier bodies 1 enters the drier body 1 on the upper layer through the discharge bin 103 connected with the adjacent drier body 1, and so on until the steam is exhausted from the exhaust port 102 of the drier body 1 on the uppermost layer. The water vapor discharged from the filter 102 enters the filter 6, the dust output along with the water vapor is filtered by the filter element 605 in the filter 6, the water in the water vapor is blocked by the filter element 605, the condensed water is output from the water outlet 604 at the bottom of the filter 6 and is treated in a centralized way, and the filtered water vapor is output from the air outlet 603 and is discharged into the atmosphere.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (8)

1. A scraper dryer for drying lignite, characterized by comprising a plurality of dryer bodies (1) arranged in a stack;

a feeding hole (101) is formed in one side of the top of the dryer body (1);

a discharge bin (103) is arranged on one side, away from the feed inlet (101), of the bottom of the dryer body (1);

a heating cavity (4) is arranged at the bottom of the dryer body (1), a heating medium inlet (401) is formed in one end, far away from the feeding hole (101), of the heating cavity (4), and a heating medium outlet (402) is formed in one end, close to the feeding hole (101), of the heating cavity (4);

a scraper device (2) is arranged in the dryer body (1), the scraper device (2) comprises a driving wheel (201), a driven wheel (202) and a scraper belt (3), and the scraper belt (3) is sleeved on the driving wheel (201) and the driven wheel (202);

the driving wheel (201) is arranged on one side close to the feed port (101) and is connected with a motor (5) outside the dryer body (1) through a first rotating shaft (21), and the first rotating shaft (21) penetrates through the dryer body (1);

the driven wheel (202) is arranged on one side close to the discharging bin (103), and the driven wheel (202) is connected with a second rotating shaft (22) penetrating through the dryer body (1);

in two adjacent dryer bodies, the discharge bin (103) of the previous dryer body is butted with the feed inlet (101) of the next dryer body;

the top of the dryer body positioned at the uppermost layer is provided with an air outlet (102).

2. The scraper dryer for drying lignite according to claim 1, characterized in that the scraper belt (3) comprises a chain (301) and a plurality of scrapers (302) welded on both sides of the chain, the driving wheel (201) and the driven wheel (202) being gears;

the chain (301) and the driving wheel (201) are connected with the driven wheel (202) in a meshing manner.

3. The scraper dryer for drying lignite according to claim 2, characterized in that the scraper (302) comprises a flat scraper (3021) and a comb scraper (3022), the flat scraper (3021) and the comb scraper (3022) being arranged adjacent to each other on the same side of the chain (301).

4. The scraper dryer for drying lignite according to claim 2 or 3, wherein a chain (301) extends from a lower end of the scraper (302) for scraping lignite.

5. Scraper dryer for lignite drying according to claim 1 characterized in that the exhaust port (102) is connected with a gas filter (6).

6. The scraper dryer for drying lignite according to claim 5, characterized in that the gas filter (6) comprises a gas filter body (601), a gas inlet (602), a gas outlet (603), a water outlet (604) and a filter element (605);

the air inlet (602) is arranged at the lower part of one side of the filter body (601), the upper part of one side of the air outlet (603), the water outlet (604) is arranged at the bottom of the filter body (601), and the filter element (605) is filled in the filter body (601); the bottom of the filter body (601) is inverted cone-shaped.

7. The scraper dryer for drying lignite according to claim 1, characterized in that a wear plate (104) is arranged on the inner bottom wall of the dryer body (1).

8. The scraper dryer for drying lignite according to claim 7, wherein the wear plate is tungsten steel or manganese steel.

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