CN206399103U - A kind of coal slime drying system - Google Patents

Abstract

The utility model provides a kind of coal slime drying system, wherein, the coal slime drying system includes coal slime breaker, drying beater and coal powder collection equipment, the entrance point of the coal slime breaker is used to receive wet coal slime, and the port of export of the coal slime breaker is connected with the entrance point of the drying beater；Air inlet is offered on the drying beater, the port of export of the drying beater is connected with the coal powder collection equipment.

Description

A coal slime drying system

technical field

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

Background technique

Coal slime is a by-product produced in the process of coal washing in coal preparation plants. It has the characteristics of high moisture content, high viscosity, high water holding capacity and low calorific value, so it is difficult to realize industrial application and has been rejected by power users for a long time. Except for a small part that is used for civilian use, most of the rest are used for combustion in coal slime boilers to generate electricity, or piled up as waste.

At present, when using the above-mentioned coal slime, the power plant adopts the mixed combustion method, that is, the coal slime and coal powder are mixed and burned, but due to the high water content, poor fluidity and low calorific value of the coal slime, it often brings operational difficulties to the operation of the boiler. Reduce boiler combustion efficiency. Therefore, in order to prevent the coal slime from bringing too much water into the boiler, it is necessary to dry the coal slime first. The diameter is uniform, and the calorific value can be greatly improved.

Domestic coal slime drying technology is mainly divided into high-temperature flue gas drying technology and low-temperature steam drying technology, of which:

(1) The high-temperature flue gas drying technology uses high-temperature flue gas to dry the coal slime in the rotary cylinder dryer. The system structure of the high-temperature flue gas drying technology is mainly composed of heat source equipment, breaking silos, belt feeders, and screw conveyors. Conveyor, rotary cylinder dryer, transmission mechanism, unloader, induced draft fan, dust removal equipment and electric control system, but the high-temperature flue gas drying technology has high energy consumption, waste of resources, and serious environmental pollution, and The temperature of the high-temperature hot air reaches 500-700°C, so there is a risk of explosion if improperly operated.

(2) The low-temperature steam drying technology is an energy-saving and environmentally-friendly technology that uses the latent heat of vaporization of the waste heat steam of the power plant to heat and dry the coal slime. The evaporated water of the coal slime can be recycled through the heat exchange equipment. The drying system using low-temperature steam drying technology is mainly composed of breaking silo, belt feeder, screw conveyor, steam drying equipment, transmission mechanism, unloader, induced draft fan, dust removal equipment and electric control system. However, although the low-temperature drying technology solves the problem of wasting resources, its equipment is bulky, heavy, and occupies a large area, so the investment cost of the plant and infrastructure is high. In addition, the low-temperature drying technology equipment has complex processes and limited low-temperature steam sources, etc. Therefore, it cannot be used on a large scale.

Utility model content

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a coal slime drying system so as to completely dry and pulverize the coal slime to meet the requirements of industrial use.

The embodiment of the utility model provides a coal slime drying system, including: a coal slime crusher, a drying and dispersing machine and a coal powder collection device, wherein:

The inlet end of the coal slime crusher is used to receive wet coal slime, and the outlet end of the coal slime crusher is connected to the inlet end of the drying and breaking machine; an air inlet is provided on the drying and breaking machine, The outlet end of the drying and dispersing machine is connected with the pulverized coal collection equipment.

Preferably, the system also includes a material separator, wherein:

The inlet end of the material separator is connected to the outlet end of the drying and dispersing machine, the first outlet end of the material separator is connected to the inlet end of the drying and dispersing machine, and the material separator The second outlet port is connected with the pulverized coal collection equipment.

Preferably, the pulverized coal collection equipment includes a cyclone separator and a bag filter, wherein:

The inlet end of the cyclone separator is connected to the outlet end of the material separator, and the outlet end of the cyclone separator is connected to the inlet end of the bag filter.

Preferably, the system also includes an induced draft fan, wherein:

The induced draft fan is connected with the outlet end of the bag filter.

Preferably, the system also includes a coal slime buffer bin and a screw feeder, wherein:

The outlet of the coal slime buffer bin is connected to the inlet end of the screw feeder, and the outlet end of the screw feeder is connected to the inlet end of the coal slime crusher.

Preferably, the system further comprises: a plate heat exchanger, wherein:

The plate heat exchanger exchanges the normal-temperature air with the heat of the hot waste water/hot steam, converts the normal-temperature air into low-temperature air, and then transports it to the drying and dispersing machine.

Preferably, the drying and dispersing machine includes: an unloading valve, the discharge end of the unloading valve is connected to the feed pipe, and the feed pipe is connected to the dry air inlet pipe to form an integral body. The outlet ends of the material pipe and the dry air inlet pipe are connected to the crushing chamber, and a rotating and breaking mechanism for quickly crushing the slime is installed inside the crushing chamber, and a saturated air outlet pipe is also connected to the crushing chamber , the discharge pipe is set at the middle section of the saturated air outlet pipe, and at the junction of the crushing chamber and the saturated air outlet pipe, a classification device to prevent large particles of crushed materials from flowing out of the discharge pipe is also installed in the crushing chamber.

Preferably, the grading device is composed of a plurality of rows of retaining rods arranged in the horizontal direction, and the retaining rods are arranged at intervals.

Preferably, the rotating breaking mechanism is a rotor hammer, and the rotor hammer is controlled by a main motor to rotate.

Preferably, an observation hole is also provided on the side wall of the feed pipe.

Preferably, the dry air inlet pipe is also connected to heat exchange and dehumidification equipment.

The coal slime drying system and its drying process provided by the embodiment of the utility model have the following beneficial effects:

(1) The utility model changes the traditional coal slime drying process and must adopt the method of heat source. The wet coal slime is pre-broken by the coal slime crusher and then enters the drying and dispersing machine to be crushed into coal slime particles. The surface moisture of the coal slime particles is dried by drying The dispersing machine is taken away by the normal temperature flowing air sucked by negative pressure, and the qualified coal slime particles are sorted by the material separator into the cyclone separator and the bag filter for drying and recovery. The material separator is controlled by the frequency conversion machine and the unqualified coal slime The particles flow into the slime crusher and the drying and breaking machine for cyclic operation, which improves the efficiency of coal slime crushing and drying.

(2) The coal slime drying process system described in the utility model has the advantage of low energy consumption, and its maximum hourly treatment of coal slime reaches more than 100 tons, and the cost control of coal slime drying is about 10 yuan/ton, and the dried coal slime It can be used in a large number of pulverized coal boiler power plants. It can not only be used in the lump coal boilers of various power plants, but also can be blended and sold with other coal products.

(3) A grading device is installed in the drying and dispersing machine. The grading device prevents the large-grained coal slime from flowing out of the discharge pipe due to the centrifugal impact force of the rotor hammer, ensuring that the large-grained coal slime continues to flow into the crushing chamber for crushing, so that the coal slime The moisture in the container is fully exposed and dispersed, which is conducive to the inflow of moisture into the air.

(4) The utility model also utilizes power plant waste heat or steam conversion or low-temperature flue gas on the basis of normal-temperature air drying, so that the temperature of normal-temperature air is appropriately increased, thereby increasing the amount of water that can be accommodated in the air, which is beneficial to the moisture content of coal slime. The air is brought out quickly, and the wet coal slime in the utility model is less than 1 minute from feeding to discharging, which can reduce the moisture content of the coal slime by more than 20% within 1 minute; the utility model can also directly use all low-temperature flue gas or high-temperature flue gas from power plants Steam and other heat sources used in the traditional coal slime drying process, and because of higher dispersion efficiency, the heat exchange efficiency is higher, and the cost of coal slime drying is lower.

(5) The coal slime particles dispersed by the drying and dispersing machine in the utility model are all dry powders of 0-0.5mm, and its water content is lower than 10%, which can be directly made into briquettes, and can be used as coal blending The coal slime particles are uniform in shape, and can also be directly burned in the pulverized coal boiler of the power plant with high efficiency.

Description of drawings:

Figure 1 is a schematic diagram of the normal temperature coal slime drying process.

Fig. 2 is a system schematic diagram of a low-temperature coal slime drying process using low-temperature flue gas from a power plant.

Fig. 3 is a system schematic diagram of a low-temperature coal slime drying process using hot wastewater/hot steam from a power plant.

Figure 4 is a schematic diagram of the structure of the drying and dispersing machine.

Among them: 1. Low temperature coal slime; 2. Coal slime buffer bin; 3. Screw feeder; 4. Coal slime crusher; 5. Material separator; , observation hole; 603, feeding pipe; 604, rotor hammer; 605, dry air inlet pipe; 606, saturated air outlet pipe; 607, retaining rod; 608, main motor; 609, crushing cavity; 610, outlet Material pipe; 7. Cyclone separator; 8. Bag filter; 9. Coal powder particles; 10. Induced fan; 11. Plate heat exchanger.

detailed description:

In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present utility model. The same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the embodiments provided below are not intended to limit the scope of the present utility model. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

Referring to the accompanying drawings, the specific implementation of each aspect of the utility model will be further described in detail.

Embodiment one:

As shown in Figure 1, the coal slime drying system described in this embodiment includes a coal slime buffer bin 2, a screw feeder 3, a coal slime crusher 4, a material separator 5, a drying and disintegrating machine 6, and a cyclone separator. Device 7, bag dust collector 8 and induced draft fan 10, in Fig. 1, 1 represents wet coal slime (before drying), and 9 represents coal powder particle (formed coal powder particle after wet coal slime is dried).

Coal slime buffer bin 2 is used to receive and store wet coal slime 1, the outlet end of coal slime buffer bin 2 is connected to the inlet end of screw feeder 3, the outlet end of screw feeder 3 is connected to the inlet end of coal slime crusher 4 connection, wherein: the wet coal slime 1 in the coal slime buffer bin 2 is sent to the coal slime crusher 4 through the screw feeder 3, and in the coal slime crusher 4, the wet coal slime is pre-crushed to form coal slime particles. The size of the wet slime 1 entering the screw feeder 3 is generally less than 300mm, and after pre-crushing by the slime crusher 4, the size of the wet slime particles is generally less than 10mm. The screw feeder 3 can control the progress of the wet slime entering the slime crusher 4, according to the amount of wet slime in the slime crusher 4, it can choose to feed the wet slime into the slime crusher or suspend feeding the wet slime .

The outlet end of the coal slime crusher 4 is connected to the inlet end of the drying and breaking machine 6, and the drying and breaking machine 6 is also provided with an air inlet 61, and the outlet end of the drying and breaking machine 6 is connected to the material separator 5, Wherein: the normal temperature gas is continuously sent into the drying and dispersing machine 6 through the air inlet of the drying and dispersing machine, and the wet coal slime particles output by the coal slime crusher 4 enter the drying and dispersing machine 6, and are dried in the normal temperature gas Under the action, the wet coal slime particles are continuously dried, and are continuously dispersed into smaller coal powder particles during the continuous stirring process of the drying and dispersing machine 6, and the size of the dispersed coal powder particles is Roughly 0 to 0.5 mm.

The outlet end of the drying and dispersing machine 6 is connected to the inlet end of the material separator 5, the first outlet end of the material separator 5 is connected to the inlet end of the drying and dispersing machine 6, and the material separator 5 is connected to the received The coal powder particles are separated. If the coal powder particles are larger than 0.5mm, the coal powder particles are sent back to the drying and dispersing machine 6 for drying and dispersing; if the coal powder particles are less than or equal to 0.5mm, the part of the coal powder particles The particles are transported to the cyclone separator 7 for subsequent separation process.

The inlet end of the cyclone separator 7 is connected to the second outlet end of the material separator 5, the outlet end of the cyclone separator 7 is connected to the inlet end of the bag filter 8, and the outlet end of the bag filter 8 is connected to the induced draft fan 10, wherein : The pulverized coal particles entering the cyclone separator 7, under the action of the cyclone separator 7, the bag filter 8 and the induced draft fan 10, the dried coal powder particles 9 are separated, and the waste gas is discharged into the atmosphere through the induced draft fan 10 middle. The separated pulverized coal particles 9 can meet the requirements of direct combustion, and belong to the pulverized coal that can be used directly. Exhaust exhaust air does not contain any pollution, so it can be discharged directly into the atmosphere.

In the embodiment of the utility model, the cyclone separator 7 and the bag filter 8 can be collectively referred to as coal powder collection equipment.

In the embodiment of the present utility model, the induced draft fan 10 may also be a high-pressure induced draft fan.

As shown in Figure 4, in the embodiment of the utility model, the drying and dispersing machine 6 includes: a discharge valve 601 with a function of uniform feed adjustment, and the discharge end of the discharge valve 601 is connected to the feed pipe 603 , the feeding pipe 603 is connected with the dry air inlet pipe 605 to form an integral body, and an observation hole 602 is also provided on the side wall of the feeding pipe 603 . The outlet ends of the feeding pipe 603 and the dry air inlet pipe 605 are connected with the crushing chamber 609, and a rotating breaking mechanism for quickly crushing the coal slime is set inside the crushing chamber 609. The rotating breaking mechanism is a rotor hammer 604 , the rotor hammer 604 is controlled by the main motor 608 to rotate, and the saturated air outlet pipe 606 is connected to the crushing chamber 609. At the connection of the air duct 606, a grading device is provided in the crushing chamber 609 to prevent large particles of pulverized materials from flowing out of the discharge pipe 610. The above-mentioned grading device is composed of multiple rows of stop rods 607 arranged in the horizontal direction. Each stop rod 607 spaced apart from each other.

The slime material enters the feed pipe 603 evenly through the discharge valve 601 and flows to the crushing chamber 609. Since the slime material is relatively viscous, the feed pipe 603 is made of smooth material to facilitate the inflow of the slime material. , to prevent the clogging of slime. The main motor 608 controls the high-speed operation of the rotor hammer 604 to crush the slime material into tiny particles, so that the water in the slime is fully exposed and dispersed, and the external dry air enters the crushing chamber from the dry air inlet pipe 605 under the action of negative pressure 609 and contact with the coal slime crushed into tiny particles, and use the dry air to bring the moisture on the surface of the coal slime to the air, so that the above-mentioned dry air in contact with the coal slime can be transformed into saturated humid air. When the coal slime material is crushed to a particle size that can be taken away by the updraft, it passes through the material blocking rod 607 and flows out from the discharge pipe 610 in the middle section of the saturated air outlet pipe 606 to enter the next-level equipment, but does not meet the particle size requirements. The large particle coal slime continues to fall into the crushing chamber 609 under the blocking of the material retaining rod 607 for pulverization until it is crushed into tiny particles that can pass through the material retaining rod 607 .

In the embodiment of the present invention, a scraping device may also be provided in the discharge valve to scrape the viscous slime into the discharge valve for subsequent processing.

In the embodiment of the present utility model, the coal slime crusher 4 can also be mixed with dry coal powder in the process of crushing the wet coal slime, so that the coal slime crusher 4 can reduce the weight of the wet coal slime after crushing in the process of crushing the wet coal slime. Dry coal powder sticks on the surface, it is not easy to stick to each other, and the crushing effect is improved. Wherein dry pulverized coal can be to directly input part of dry pulverized coal to coal slime crusher 4 at the output end of drying and disintegrating machine 6, also can directly add dry pulverized coal in coal slime crusher 4 from other channels.

In the embodiment of the utility model, when the drying and breaking up machine 6 is drying and breaking up the wet coal slime after splitting, it can also mix other dry coal powders such as fine coal, mixed coal, lignite, etc., so that the drying The effect of breaking up is better.

In the embodiment of the utility model, before the normal temperature air or low temperature flue gas or low temperature air of the power plant input by the dry air inlet pipe 605 enters the drying and dispersing machine 6, the normal temperature air or the low temperature of the power plant can be reduced by heat exchange and dehumidification equipment first. Humidity in flue gas or low-temperature air improves the drying and dispersing effect.

The coal slime drying system provided by the embodiment of the utility model can use air at normal temperature or low temperature air below 100°C for drying.

Embodiment two:

As shown in Figure 2, the embodiment of the utility model also provides a coal slime drying system, including a coal slime buffer bin 2, a screw feeder 3, a coal slime crusher 4, a material separator 5, and a drying and breaking machine 6, cyclone separator 7, bag filter 8 and induced draft fan 10, in Fig. 2, 1 represents the wet coal slime before drying, and 9 represents the coal slime (coal powder) after drying.

In this embodiment, what the air inlet of the drying and dispersing machine 6 introduces is the low-temperature flue gas of the power plant, and the drying and dispersing machine 6 uses the low-temperature flue gas to dry and disperse the wet coal slime, which improves the efficiency of drying and dispersing. scattered efficiency.

The connection relationship and function description of each component in the coal slime drying system provided by the embodiment of the utility model are consistent with those in the first embodiment, and the description in the first embodiment can be referred to, and will not be repeated here.

Embodiment three:

As shown in Figure 3, the embodiment of the utility model also provides a coal slime drying system, including a coal slime buffer bin 2, a screw feeder 3, a coal slime crusher 4, a material separator 5, and a drying and breaking machine 6, cyclone separator 7, bag filter 8 and induced draft fan 10, in Fig. 3, 1 represents the wet coal slime before drying, and 9 represents the coal slime (coal powder) after drying.

The coal slime drying system provided by the embodiment of the utility model also includes a plate heat exchanger 11, and the plate heat exchanger 11 inputs normal temperature gas and hot waste water/hot steam discharged from the power plant, and heats the hot waste water/hot steam with normal temperature air. Exchange, the cold waste water produced is discharged directly, and the hot air (also called "low temperature air") generated enters the drying and breaking machine 6 through the air inlet of the drying and breaking machine 6 to dry the wet coal slime.

The connection relationship and functions of other components in the slime drying system provided by the embodiment of the utility model are consistent with those in the first embodiment, and reference can be made to the description in the first embodiment, which will not be repeated here.

Embodiment four:

The embodiment of the utility model also provides a coal slime drying process using the above coal slime drying system to dry the coal slime, including:

S1. The wet coal slime is transported to the coal slime buffer bin through the conveyor belt;

After the system is powered on, the wet coal slime is sent to the coal slime buffer bin through the conveyor belt. The wet coal slime can be the tailings product of the coal preparation plant. The shape is blocky, and its size is generally less than 300mm. Wet coal slime is generally formed by the mutual adsorption of a large number of pulverized coal particles with a size below 0.5 mm under the viscosity of the external water. The wet coal slime can be dehydrated by a disc filter to reduce the moisture content of the wet coal slime by 25-35%. Wet coal slime can be temporarily stored in the coal slime buffer bin, and then sent to the coal slime crusher.

S2. The wet coal slime is sent to the coal slime crusher through the coal slime buffer bin through the screw feeder, and the wet coal slime is pre-crushed;

The wet coal slime enters the screw feeder from the slime buffer bin first, and then is sent to the slime crusher by the screw feeder. The screw feeder can choose to feed the slime according to the amount of slime in the slime crusher. Speed up, stabilize or stop conveying wet slime. The wet slime can enter the screw feeder through the conveyor belt, or set the inlet end of the screw feeder below the outlet end of the slime buffer bin, so that opening the slime buffer bin will allow the wet slime to directly enter the screw feeder inside the plane. The wet coal slime in the screw feeder is fed into the slime crusher during the rotation process, and the inlet of the slime crusher can be set directly below the outlet of the screw feeder.

The coal slime crusher can pre-break the wet coal slime by using high-speed rotating hammers or rotating cages, so that the particle size of the pre-broken wet coal slime particles is less than 10mm, which is convenient for subsequent drying and breaking up by the dispersing machine. It can improve the efficiency of drying and dispersing.

S3. The pre-crushed wet coal slime is sent to the drying and dispersing machine for drying and dispersing;

After the pre-crushed wet coal slime is sent to the drying and dispersing machine, it is broken into coal slime particles in the drying and dispersing machine. The dispersed coal slime particles are mixed with normal temperature air or low-temperature flue gas or low-temperature air from the air inlet of the drying and dispersing machine through negative pressure suction, and the surface of the coal slime particles Moisture is taken out and dried into coal powder particles, wherein the particle size of coal powder particles is 0-0.5mm.

After the air at normal temperature or the low-temperature flue gas or low-temperature air of the power plant passes through the drying and dispersing machine, under the action of the induced draft fan, an airflow path is formed in the drying and dispersing machine, material separator, cyclone separator and bag filter, and the air is flowing During the process, the moisture on the surface of the wet coal slime particles can be taken away, so that the coal slime particles can be dried into coal powder particles. At the same time, the drying and dispersing machine is constantly stirring during the working process to accelerate the loss of water in the wet slime and improve the drying efficiency.

The pre-crushed wet coal slime can be sent to the drying and disintegrating machine through the transmission belt, or the inlet end of the drying and disintegrating machine is set below the outlet end of the coal slime crusher, and the crushed wet coal slime can be sent directly to the drying machine. Break into the machine.

S4: The pulverized coal particles after being dried and dispersed are sent to the material separator;

The pulverized coal particles that have been dried and dispersed can flow into the material separator, cyclone separator, and bag filter in sequence under the action of the updraft, in which:

After being dried and dispersed into the material stager, the pulverized coal particles can be sorted by the material separator, and the pulverized coal particles with a particle size less than or equal to 0.5mm are sequentially transported to the cyclone separator and bag filter to realize the separation of coal Recycling of powder particles; coal powder particles with a particle size greater than 0.5mm will be re-sent to the drying and dispersing machine for drying and dispersing again.

S5. Discharge the flowing gas in the cyclone separator and the bag filter through the induced draft fan.

The flowing gas can be air at normal temperature, low temperature air or low temperature flue gas from a power plant. For normal temperature air and low temperature air, it can be directly discharged into the atmosphere. For low temperature flue gas from a power plant, it needs to be transported to the exhaust pipe of the power plant for pollution treatment. re-emit to the atmosphere.

It should be noted that: when the wet coal slime is pre-crushed in step S2, dry coal powder can be added, and the surface of the wet coal slime after pre-crushing is stuck with dry coal powder to prevent the wet coal slime after pre-crushing from sticking together again, affecting the Pre-shattering effect. In step S2, the added dry coal powder can be part of the coal powder particles output in step S4, or dry coal powder input through other channels.

In step S3, when drying and dispersing the pre-crushed wet coal slime, other dry coal powders such as fine coal, blended coal, lignite, etc. may be mixed to make the drying and dispersing effect better.

In step S3, before normal-temperature air or low-temperature flue gas from a power plant or low-temperature air enters the drying and dispersing machine, the humidity in the normal-temperature air or low-temperature flue gas or low-temperature air from a power plant can be reduced through heat exchange and dehumidification equipment to improve the drying and dispersing process. diffuse effect.

The coal slime drying system and its drying process provided in the embodiment of the utility model can be used not only to process coal slime, but also to process sludge, distiller's grains and substances with similar characteristics. Therefore, the coal slime involved in the embodiments of the present invention can also be sludge, distiller's grains and substances with similar properties.

Obviously, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation of the present utility model. For those of ordinary skill in the art, on the basis of the above description It is also possible to make other changes or changes in different forms. The exemplary embodiments of the utility model cannot exhaust all implementation modes. included in the scope of protection of utility models. All documents mentioned in this application are incorporated by reference in this application as if each individual document was incorporated by reference.

Claims (12)

1. a kind of coal slime drying system, it is characterised in that：The system includes：Coal slime breaker (4), drying beater (6) and Coal powder collection equipment, wherein：

The entrance point of the coal slime breaker (4) is used to receive wet coal slime, and the port of export of the coal slime breaker (4) dries with described The entrance point connection of dry beater (6)；Offer air inlet on drying beater (6), drying beater (6) go out Mouth end is connected with the coal powder collection equipment.

2. a kind of coal slime drying system as claimed in claim 1, it is characterised in that：The system also includes material separator (5), wherein：

The entrance point of the material separator (5) is connected with the port of export of the drying beater (6), the material separator (5) first outlet end is connected with the entrance point of the drying beater (6), the second outlet end of the material separator (5) It is connected with the coal powder collection equipment.

3. a kind of coal slime drying system as claimed in claim 2, it is characterised in that the coal powder collection equipment includes whirlwind point From device (7) and sack cleaner (8), wherein：

The entrance point of the cyclone separator (7) is connected with the second outlet end of the material separator (5), the cyclonic separation The port of export of device (7) connects with the entrance point of the sack cleaner (8).

4. a kind of coal slime drying system as claimed in claim 3, it is characterised in that the system also includes air-introduced machine (10), Wherein：

The air-introduced machine (10) is connected with the port of export of the bag dust collector (8).

5. a kind of coal slime drying system as claimed in claim 1, it is characterised in that the system also includes coal slime surge bunker (2) and screw(-type) feeder (3), wherein：

The outlet of the coal slime surge bunker (2) is connected with the entrance point of the screw(-type) feeder (3), the screw(-type) feeder (3) The port of export be connected with the entrance point of the coal slime breaker (4).

6. coal slime drying system as claimed in claim 1, it is characterised in that the system also includes：Plate type heat exchanger (11), Wherein：

The plate type heat exchanger (11) swaps the heat of normal temperature air and thermal wastewater/vapours, and normal temperature air is changed To be delivered to drying beater (6) after Cryogenic air.

7. the coal slime drying system as described in claim 1 to 6 is any, it is characterised in that：The drying beater (6) includes： Discharge valve (601), the discharge end of the discharge valve (601) is connected with feed pipe (603), and the feed pipe (603) is empty with drying Gas blast pipe (605) is connected to form one, and the port of export of the feed pipe (603) and dry air blast pipe (605) is with breaking Broken chamber (609) connects, and being provided for the rotation to coal slime fast-crushing inside the crusher chamber (609) breaks up mechanism, in institute State and saturated air discharge pipe (606) is also connected in crusher chamber (609), discharge nozzle (610) is opened in saturated air discharge pipe (606) Middle section, also sets in the crusher chamber (609) with the junction of saturated air discharge pipe (606), in the crusher chamber (609) Put the grading plant for preventing bulky grain comminuting matter from flowing out discharge nozzle (610).

8. coal slime drying system as claimed in claim 7, it is characterised in that：The grading plant is arranged in the horizontal direction by multirow Backgauge rod (607) composition of row, arranged for interval each other between each backgauge rod (607).

9. coal slime drying system as claimed in claim 7, it is characterised in that：It is rotor hammer (604) that mechanism is broken up in the rotation, The rotor hammer (604) is rotated by main motor (608) control.

10. coal slime drying system as claimed in claim 7, it is characterised in that：The rotation breaks up mechanism for rotating cage, described turn Cage is rotated by main motor (608) control.

11. coal slime drying system as claimed in claim 7, it is characterised in that：Also set up in the side wall of the feed pipe (603) Peep hole (602).

12. coal slime drying system as claimed in claim 7, it is characterised in that：The dry air blast pipe (605) is also with changing Hot dehumidification equipment is connected.