A lignite catalytic device and lignite processing system and processing method thereof

Abstract

The present invention discloses a lignite catalytic device and a lignite processing system and a processing method thereof. The lignite stored in a buffer silo is transported to corresponding catalytic reactors through a material dividing screw, and then the lignite gathered in the buffer silo is divided into multiple parts. Then, the lignite is mixed with a lignite catalytic additive in each catalytic reactor, and the contact area between the lignite catalytic additive and the lignite is fully increased, thereby improving the catalytic effect on the lignite. Moreover, since the weight of the lignite catalytic additive is different from that of the lignite particles, the lignite catalytic additive is easily deposited at the bottom of the catalytic reactor. Therefore, the blades of the stirring mechanism reciprocate and are close to the inner side of the bottom wall of the catalytic reactor, thereby continuously turning over the lignite at the bottom or top of the catalytic reactor, and fully mixing with the lignite catalytic additive after stirring in the vertical direction, further improving the full contact between the lignite and the lignite catalytic additive, and ensuring the catalytic effect on the lignite.

Description

Technical Field

[0001] The invention relates to the technical field of lignite processing, and in particular to a lignite catalytic device and a lignite processing system and a processing method thereof. Background Art

[0002] Lignite is a type of coal with a large storage volume. China's lignite reserves account for about 13% of coal reserves, and lignite in other countries of the world accounts for about 30% of coal mining. The total production and utilization of lignite is huge. At present, lignite utilization is a problem all over the world. The main problems are that lignite is flammable and difficult to store; lignite is prone to reabsorb water after drying, which greatly reduces the drying effect; because lignite has a high water content, the transportation cost is high, and the effect and production efficiency of lignite chemical industry are low. Therefore, it is the most urgent problem to find an effective process to solve the problem of lignite utilization. At present, the main methods are direct combustion of lignite for power generation, that is, lignite with a water content of about 40-50% is directly transported to the boiler for combustion; a slightly better process is to use lignite with high water content after drying, dehydrate lignite to a lower ten, improve the calorific value of lignite, and improve the combustion efficiency; there is also a process of isolating lignite from air for pyrolysis, and obtaining coal gas, tar, coke, etc. according to the temperature difference. There are too many problems in the production process of the above utilization methods. The main manifestation is that the lignite utilization process is flammable and explosive, with high risks and multiple accidents. The production site has extremely high requirements for equipment, operators, and operating procedures; the dried lignite also has the characteristic of reabsorbent water, which greatly reduces the drying efficiency. The unstable state of lignite also makes transportation inconvenient.

[0003] Patent document CN106047441B discloses a lignite drying and upgrading system, which relates to a lignite drying and upgrading system, including four silos with heat exchange function and a heat exchange device capable of providing heat exchange medium to the four silos for heat exchange; the four silos respectively have a medium inlet and a medium outlet, and the medium inlet and the medium outlet of the four silos are respectively connected to the medium flow direction switching control pipeline, and the flow direction of the heat exchange medium in the four silos can be changed by controlling the opening or closing of the corresponding switching valve on the medium flow direction switching control pipeline, so that the four silos can switch among the four silo functions of preheating silo, drying silo, upgrading silo and unloading silo and respectively perform one of the silo functions, and the heat exchange medium flows in the order of upgrading silo-drying silo-preheating silo after the unloading silo is isolated and flows back to the heat exchange device. However, it is still inevitable that it is easy to cause water reabsorption after drying. Summary of the invention

[0004] The purpose of the present invention is to provide a lignite catalytic device and a lignite processing system and a processing method thereof to solve the problems existing in the above-mentioned prior art, and can effectively solve the problems existing in the current lignite production, transportation and utilization process, such as high water content, unstable state and low utilization efficiency of lignite.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a lignite catalytic device, comprising a buffer silo connected to a feeding device, a plurality of material distribution screws are arranged at the inner bottom of the buffer silo, and the discharge ends of the material distribution screws are respectively connected to discharge channels, and the discharge channels are respectively connected to a catalytic reactor, a lignite catalytic additive is introduced into the catalytic reactor, and a stirring mechanism and a heating mechanism for heating the lignite mixed with the lignite catalytic additive are arranged in the catalytic reactor, the stirring mechanism comprises a rotating shaft extending in a horizontal direction and stirring blades surrounding the rotating shaft, and the blades of the stirring mechanism reciprocate close to the inner side of the bottom wall and the inner side of the top wall of the catalytic reactor.

[0006] Preferably, the inner cavity of the catalytic reactor is a horizontally extending cylindrical structure, and the circumference of the top of the stirring blade matches the cylindrical structure.

[0007] Preferably, a feeding mechanism for introducing the lignite catalytic additive is provided on the side wall of the catalytic reactor.

[0008] Preferably, the buffer bin is further provided with a first disturbance device located above the distribution screw, and the first disturbance device gathers the lignite at the feeding end of the distribution screw.

[0009] A lignite processing system is also provided, comprising a feeding device, the lignite catalytic device connected to the feeding device, a collection bin and a dryer sequentially connected to the discharge side of the lignite catalytic device along the feeding direction, a feeding port for conveying the lignite to the collection bin is provided at the bottom of the catalytic reactor, and a closed door for sealing the collection bin is provided at the feeding port.

[0010] Preferably, an aggregate trough is provided on the inner bottom wall of the aggregate bin, a spiral feed mechanism for conveying lignite is provided in the aggregate trough, and a conveying channel connected to the dryer is provided at the discharge end of the spiral feed mechanism.

[0011] Preferably, a second disturbance device for gathering the lignite in the aggregate trough is provided above the aggregate trough.

[0012] Preferably, the dryer includes a base and a heating drum rotatably arranged on the base, one end of the heating drum is provided with a feeding mechanism for pushing the lignite therein, the feeding mechanism is connected with the feeding channel, and the other end of the heating drum is provided with an outlet for the dried lignite.

[0013] Preferably, a hollow pipe extending from the outlet side to the feeding mechanism is provided in the inner wall of the heating drum, an air inlet for hot air to enter is provided in the hollow pipe near the outlet side, and an air outlet for hot air to flow out is provided in the hollow pipe near the feeding mechanism side.

[0014] A lignite processing method is also provided, comprising the following steps:

[0015] Loading: The lignite is transported to the buffer silo for temporary storage through the loading device;

[0016] Material distribution: The lignite in the buffer bin is gathered at the feeding end of the material distribution screw by the first disturbance device, and the material distribution screw is started to transport the lignite through the discharge channel and into the corresponding reactor;

[0017] Catalytic reaction: after the lignite in the reactor reaches a corresponding amount, the material distribution screw is closed, and the feeding mechanism adds the lignite catalytic additive into the reactor, and at the same time, the heating mechanism and the stirring mechanism are turned on, and the lignite mixed with the lignite catalytic additive is heated to 65°C to 95°C by the heating mechanism, and the lignite mixed with the lignite catalytic additive is stirred and mixed in the vertical direction;

[0018] Feeding: opening the closed door, conveying the lignite mixed with the lignite catalytic additive to the aggregate bin, gathering the lignite in the aggregate trough through the second disturbance device, opening the spiral feeding mechanism, conveying the lignite mixed with the lignite catalytic additive to the conveying channel;

[0019] Drying: The lignite mixed with the lignite catalytic additive is transported to the heating drum through the feeding mechanism. The lignite mixed with the lignite catalytic additive rolls with the heating and moves along the axial direction of the heating roller to its discharge end. The dried lignite is collected in the dry material bin.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] First, a plurality of material distribution screws are provided at the bottom inner side of the buffer silo, and the material distribution screw discharge ends are respectively connected to material distribution channels, and the material distribution channels are respectively connected to catalytic reactors, and lignite catalytic additives are introduced into the catalytic reactors, and a stirring mechanism is provided in the catalytic reactors, and the stirring mechanism comprises a rotating shaft extending in a horizontal direction and stirring blades surrounding the rotating shaft, and the blades of the stirring mechanism reciprocate close to the inner side of the bottom wall of the catalytic reactor, that is to say, the lignite stored in the buffer silo is first transported to the corresponding catalytic reactors through the material distribution screws, and then the lignite accumulated in the buffer silo is divided into multiple parts, and then the lignite and the lignite catalytic additives are mixed in each catalytic reactor to fully increase the lignite content. The contact area between the lignite catalytic additive and the lignite is increased, thereby improving the catalytic effect on the lignite. In addition, due to the different weights of the lignite catalytic additive and the lignite particles, they are easily affected by their own gravity, resulting in the lignite catalytic additive being easily deposited at the bottom or suspended on the top of the catalytic reactor when the two are mixed. Therefore, the blades of the stirring mechanism reciprocate close to the inner side of the bottom wall and the inner side of the top wall of the catalytic reactor, thereby continuously turning over the lignite at the bottom or top of the catalytic reactor, and mixing it with the lignite catalytic additive flowing downward or deposited at the bottom of the catalytic reactor, or mixing it with the lignite catalytic additive suspended on the surface of the lignite, further improving the full contact between the lignite and the lignite catalytic additive, and ensuring the catalytic effect on the lignite.

[0022] Second, the catalytic reactor is equipped with a feeding mechanism for introducing lignite catalytic additives. The feeding mechanism includes a number of feeding ports evenly arranged on the side wall of the catalytic reactor. The lignite catalytic additives can be added to the catalytic reactor in a timely and quantitative manner through the feeding mechanism. There is no need to set a closable opening or manually add materials to the catalytic reactor, which ensures the airtightness of the catalytic reactor and improves the convenience and uniformity of adding materials to the catalytic reactor.

[0023] Thirdly, a first disturbance device is provided in the buffer bin, which is located above the distribution screw. The first disturbance device gathers the lignite at the feeding end of the distribution screw. The first disturbance device makes the lignite in the buffer bin no longer gather in one place, but can move to the feeding end of the powder screw under the action of the first disturbance device, thereby improving the effectiveness of evenly distributing the lignite in the buffer bin in the corresponding catalytic reactor.

[0024] Fourth, a hollow pipe extending from the outlet side to the feeding mechanism is provided in the inner wall of the heating drum, an air inlet for hot air is provided near the outlet side of the hollow pipe, and an air outlet for hot air outflow is provided near the feeding mechanism side of the hollow pipe. Through the feeding mechanism and the hollow pipe, the lignite first exchanges heat with the subsequent hot air, and then further exchanges heat with the hollow pipe at the inlet end of the heating drum. The newly introduced hot air is introduced into the hollow pipe at the inlet end of the heating drum, which effectively improves the efficiency of lignite drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a side view of the overall structure of the present invention;

[0027] Figure 2 It is a front view of the overall structure of the present invention;

[0028] Figure 3 It is a top view of the overall structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the connection between the buffer silo and the reactor of the present invention;

[0030] Figure 5 This is a schematic diagram of the cache silo of the present invention;

[0031] Figure 6 It is a schematic diagram of the reaction kettle of the present invention;

[0032] Figure 7 It is a schematic diagram of the aggregate bin of the present invention;

[0033] Figure 8 It is a schematic diagram of the heating roller of the present invention;

[0034] Among them, 1-feeding device, 2-buffer silo, 3-first disturbance device, 4-distribution screw, 5-catalytic reactor, 6-collection silo, 7-second disturbance device, 8-screw feeding mechanism, 9-heating roller, 10-dry material silo, 11-dry material conveyor, 12-unloading screw unloader, 13-feeding silo, 14-feeding conveyor, 15-enclosed door, 16-feeding mechanism, 17-discharging channel, 18-air outlet, 19-base. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The purpose of the present invention is to provide a lignite catalytic device and a lignite processing system and a processing method thereof to solve the problems existing in the above-mentioned prior art, and can effectively solve the problems existing in the current lignite production, transportation and utilization process, such as high water content, unstable state and low utilization efficiency of lignite.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please refer to Figures 1 to 8In the present embodiment, a lignite catalytic device is provided. To ensure the catalytic reaction effect and full utilization of the combustion heat, the lignite is processed in advance into a coal powder structure, including a buffer silo 2 connected to a feeding device 1. A plurality of dividing screws 4 are provided at the inner bottom of the buffer silo 2. The discharging ends of the dividing screws 4 are respectively connected to a discharging channel 17, and the discharging channels 17 are respectively connected to a catalytic reactor 5. The number of dividing screws 4 depends on the number of catalytic reactors 5. After the material in the catalytic reactor 5 reaches an appropriate amount, for example, a weighing sensor can be provided in the catalytic reactor 5, the dividing screw is closed, and the catalytic reactor 5 works. A lignite catalytic additive is introduced into the catalytic reactor 5, wherein the lignite catalytic additive can catalytically react the lignite, convert the internal water (crystallized water) in the lignite particles into external water (natural water), and change the properties of the lignite particles so that the reabsorption phenomenon will not easily occur after drying. The lignite catalytic additive in each catalytic reactor 5 accounts for 1% to 2% of the total amount of lignite therein. For example, the weight of lignite added to each catalytic reactor 5 is 5t, and the lignite catalytic additive added is about 50kg. The lignite catalytic additive can block the channels after the lignite particles precipitate water and wrap the lignite particles like "plastic". This not only greatly reduces the moisture absorption of the lignite particles after natural drying and dehydration, but also achieves the purpose of preventing air moisture from re-entering. The catalytic reactor 5 is provided with a stirring mechanism and a heating mechanism for heating the lignite mixed with the lignite catalytic additive. The stirring mechanism includes a rotating shaft extending in the horizontal direction and stirring blades surrounding the rotating shaft. The blades of the stirring mechanism reciprocate close to the inner side of the bottom wall of the catalytic reactor 5. That is to say, firstly, due to the timed and quantitative catalytic reaction of the lignite catalytic additive and the lignite, a certain amount of lignite and lignite catalytic additive are stored in each catalytic reactor 5. After a certain period of reaction, the lignite and lignite catalytic additive are removed from the catalytic reactor 5, and the lignite stored in the buffer silo 2 is transported to the corresponding catalytic reactor 5 through the dividing screw 4. A certain amount of lignite can be processed by multiple catalytic reactors at the same time, thereby improving the processing efficiency.Furthermore, the lignite stored in the buffer silo 2 is transported to the corresponding catalytic reactor 5 by the dividing screw 4, and then the lignite accumulated in the buffer silo 2 is divided into multiple parts. Then, the lignite and the lignite catalytic additive are mixed in each catalytic reactor 5, which fully increases the contact area between the lignite catalytic additive and the lignite, thereby improving the catalytic effect on the lignite. In addition, since the weight of the lignite catalytic additive is different from that of the lignite particles, it is easily affected by its own gravity, resulting in the lignite catalytic additive being easily deposited at the bottom or suspended at the top of the catalytic reactor 5 when the two are mixed. Therefore, the blades of the stirring mechanism reciprocate close to the inner side of the bottom wall and the inner side of the top wall of the catalytic reactor 5, thereby continuously turning over the lignite at the bottom or top of the catalytic reactor 5, and mixing it with the lignite catalytic additive flowing downward or deposited at the bottom of the catalytic reactor 5, or with the lignite catalytic additive suspended on the surface of the lignite, further improving the full contact between the lignite and the lignite catalytic additive, and ensuring the catalytic effect on the lignite. Preferably, the feeding device 1 comprises a feeding bin 13, and a feeding screw discharger 12 is installed at the bottom of the feeding bin 13. The feeding screw discharger 12 transports the material in the feeding bin 13 to a feeding conveyor 14, and the feeding conveyor 14 transports the wet lignite to the buffer bin 2 for temporary storage.

[0039] Preferably, a heating device is provided in the catalytic reactor 5, and the heating device is preferably a heating tube built into the inner wall of the catalytic reactor 5. The heating device is used to catalyze the lignite and the lignite catalytic additive in the catalytic reactor 5 to raise the temperature to 65°C to 95°C.

[0040] As a preferred embodiment of the present invention, the loading vehicle loads the lignite from the material field into the upper bin 13. The main function of the upper bin 13 is to carry the temporary material of the loading vehicle. The size of the bin can meet the loading height and width and thickness of the loading vehicle. The bottom of the upper bin 13 is a material unloading screw unloader 12. According to the specifications of the bin, it can be a single-axis screw, a double-axis screw or a multi-axis screw. The main function is to evenly discharge the wet lignite from the upper bin 13 according to the requirements of the discharge volume, and to have a preliminary crushing effect on the wet lignite. Then the wet coal enters the conveying device at the bottom. The conveying device can be a belt conveyor, a scraper conveyor, a screw conveyor, etc. The conveyor transports the wet coal from the bin to the next level of the buffer bin 2. It should be noted that the equipment from the loading vehicle to the loading conveyor 14 may not be necessary. The conditions are met on site to directly connect the wet lignite to the buffer bin 2.

[0041] Preferably, the buffer silo 2 is a relatively large temporary coal storage device, with multiple discharge ports at the bottom to store the delivered wet coal to meet the required storage volume. The first disturbance device 3 arranged at the bottom of the buffer silo 2 can be a rake disturbance device or multiple spirals.

[0042] Furthermore, the inner cavity of the catalytic reactor 5 is a horizontally extending cylindrical structure, and the circumference of the top of the stirring blade matches the cylindrical structure to improve the stirring effect on the lignite.

[0043] Furthermore, the catalytic reactor 5 is equipped with a feeding mechanism for introducing the lignite catalytic additive, and the feeding mechanism includes a plurality of feeding ports evenly arranged on the side wall of the catalytic reactor 5. The lignite catalytic additive can be added into the catalytic reactor 5 in a timely and quantitative manner through the feeding mechanism, and there is no need to set a closable opening, or manually add materials into the catalytic reactor 5, etc., thereby ensuring the airtightness of the catalytic reactor 5, and through the even arrangement of the feeding ports, the lignite catalytic additive can fully contact with the lignite, and then can be fully mixed and uniform, and the convenience and uniformity of adding materials into the catalytic reactor 5 are improved. The preferred feeding mechanism is a quantitative screw feeding device, such as a small screw feeder.

[0044] In order to completely discharge the materials in the silo, a first disturbance device 3 located above the dividing screw 4 is further provided in the buffer silo 2. The first disturbance device 3 gathers the lignite at the feeding end of the dividing screw 4. The first disturbance device 3 makes the lignite in the buffer silo 2 no longer gather in a certain place, but can be moved to the feeding end of the powder screw under the action of the first disturbance device 3, thereby improving the effectiveness of evenly distributing the lignite in the buffer silo 2 in the corresponding catalytic reactor 5.

[0045] A lignite processing system is also provided, comprising a feeding device 1, a lignite catalytic device connected to the feeding device 1, a collection bin 6 and a dryer sequentially connected to the discharge side of the lignite catalytic device along the feeding direction, a feeding port for lignite to be conveyed to the collection bin 6 is provided at the bottom of the catalytic reactor 5, and a closed door 15 is provided at the feeding port to seal the collection bin 6. Preferably, the feeding port and the closed door 15 are arranged at the catalytic reactor 5, and after the catalytic reactor 5 is finished working, the closed door 15 at the bottom of the catalytic reactor 5 is opened, and the lignite that has been catalytically treated in the catalytic reactor 5 is discharged through the closed door 15.

[0046] Furthermore, an aggregate trough is provided on the inner bottom wall of the aggregate bin 6, and a spiral feed mechanism 8 for transmitting lignite is provided in the aggregate trough, and a conveying channel connected to the dryer is provided at the discharge end of the spiral feed mechanism 8. Preferably, the aggregate bin 6 is a temporary storage device for lignite after reaction modification, and the spiral feed mechanism 8 conveys the material in the aggregate bin 6 to the dryer. The specific dryer is provided with a feed screw (secondary conveying can be designed here according to the site conditions). The feed screw is a shaftless screw, which is arranged in the same direction or even concentrically with the dryer, and is provided with an exhaust gas outlet. The feed screw pushes the catalyzed lignite to the dryer, and the preferred dryer is a drum dryer. The drum dryer is one of the core equipment of the lignite utilization process, generally using steam as energy and a small amount of flue gas.

[0047] Among them, the catalytic reactor 5 is one of the key equipments of this process. The original lignite needs to be subjected to a catalytic modification reaction. The catalytic modification reaction temperature is generally not higher than 100°C. The lignite after the reaction modification is not easy to burn, the volatile matter changes very little, and it no longer has the ability to reabsorb water (that is, the dried lignite is placed in the external environment and no longer has the ability to absorb water by itself). The catalytic reactor 5 is generally closed after the quantitative lignite enters the catalytic reaction from the top material dividing screw. After the reaction is completed, the lignite after the reaction is discharged from the catalytic reactor 5 through the closed door 15 and enters the collection bin 6.

[0048] Furthermore, a second disturbance device 7 is provided above the aggregate trough for gathering the lignite in the aggregate trough. The bottom of the stable silo is generally provided with a material disturbance device to disturb the lignite from the periphery to the stable material conveying screw (or other conveying devices such as a scraper conveyor) at the bottom of the silo.

[0049] Furthermore, the dryer includes a base 19 and a heating drum 9 rotatably arranged on the base 19. A feeding mechanism 16 for pushing the lignite into the heating drum 9 is provided at one end thereof, and the feeding mechanism 16 is connected to the feeding channel. An outlet for the dried lignite is provided at the other end of the heating drum 9. The moisture content of the lignite is largely evaporated in the dryer until it is dried to the required moisture content, and the drying effect is achieved to become a finished product, which is discharged from the inside of the dryer and enters the conveying equipment. The waste gas generated during the drying process is connected to the waste gas treatment device from the feed screw waste gas port for treatment and then discharged in compliance with the standards. The dry material conveyor 11 transports the finished product to the dry material bin 10 for storage or to the dry material field for stacking for standby use.

[0050] Furthermore, a hollow pipe extending from the outlet side to the feeding mechanism 16 is provided in the inner wall of the heating drum 9, an air inlet for hot air is provided near the outlet side of the hollow pipe, and an air outlet 18 for hot air outflow is provided near the feeding mechanism 16 side of the hollow pipe. Through the feeding mechanism 16 and the hollow pipe, the lignite first exchanges heat with the subsequent hot air, and then further exchanges heat with the hollow pipe at the inlet end of the heating drum 9. The newly introduced hot air is introduced into the hollow pipe at the inlet end of the heating drum 9, which effectively improves the efficiency of drying the lignite.

[0051] Furthermore, a lignite processing method is provided, comprising the following steps:

[0052] Loading: The lignite is transported to the buffer silo 2 for temporary storage through the loading device 1;

[0053] Material distribution: The lignite in the buffer bin 2 is gathered at the feeding end of the material distribution screw 4 by the first disturbance device 3, and the material distribution screw 4 is started to transport the lignite through the discharge channel 17 and into the corresponding reactor;

[0054] Catalytic reaction: after the lignite in the reactor reaches a corresponding amount, the material distribution screw 4 is closed, and each spray port sprays the lignite catalytic additive toward the lignite, and at the same time, the heating mechanism and the stirring mechanism are turned on, and the lignite mixed with the lignite catalytic additive is heated to 65°C to 95°C by the heating mechanism, and the lignite mixed with the lignite catalytic additive is stirred and mixed in the vertical direction, and the mixing is sufficient;

[0055] Feeding: Open the closed door 15 to transport the catalyzed lignite to the collection bin 6, gather the lignite in the collection trough through the second disturbance device 7, and open the spiral feeding mechanism 8 to transport the catalyzed lignite to the conveying channel;

[0056] Drying: The catalyzed lignite is transported to the heating drum 9 through the feeding mechanism 16 . The catalyzed lignite rolls with the heating and moves axially along the heating drum to its discharge end. The dried lignite is collected in the drying bin 10 .

[0057] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0058] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0059] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lignite processing system, It is characterized in that The invention comprises a lignite catalytic device, wherein the lignite catalytic device comprises a buffer silo connected to a feeding device, a plurality of material distribution screws are arranged at the inner bottom of the buffer silo, and the material distribution screws are respectively connected to the material distribution channels at the material distribution ends, and the material distribution channels are respectively connected to a catalytic reactor, wherein a lignite catalytic additive is introduced into the catalytic reactor, and a stirring mechanism and a heating mechanism for heating the lignite mixed with the lignite catalytic additive are arranged in the catalytic reactor, wherein the stirring mechanism comprises a rotating shaft extending in a horizontal direction and a stirring blade surrounding the rotating shaft, and the stirring blade reciprocates close to the inner side of the bottom wall and the inner side of the top wall of the catalytic reactor; The lignite processing system also includes a feeding device, a collection bin and a dryer which are sequentially connected to the discharge side of the lignite catalytic device along the feeding direction, the feeding device is connected to the lignite catalytic device, and a feeding port for delivering lignite to the collection bin is provided at the bottom of each catalytic reactor, and a closed door which can seal the collection bin is provided at each feeding port; The dryer comprises a base and a heating drum rotatably arranged on the base, one end of the heating drum is provided with a feeding mechanism for pushing the lignite therein, and the other end of the heating drum is provided with an outlet for the dried lignite; A hollow pipe extending from the outlet side to the feeding mechanism is provided in the inner wall of the heating drum, an air inlet for hot air to enter is provided in the hollow pipe near the outlet side, and an air outlet for hot air to flow out is provided in the hollow pipe near the feeding mechanism side.

2. The lignite processing system according to claim 1, It is characterized in that The inner cavity of the catalytic reactor is a horizontally extending cylindrical structure, and the circumference of the top of the stirring blade matches the cylindrical structure.

3. The lignite processing system according to claim 2, It is characterized in that The catalytic reactor is equipped with a feeding mechanism for introducing the lignite catalytic additive, and the feeding mechanism includes a plurality of feeding ports evenly arranged on the side wall of the catalytic reactor.

4. The lignite processing system according to claim 3, It is characterized in that The buffer bin is also provided with a first disturbance device located above the distribution screw, and the first disturbance device gathers the lignite at the feeding end of the distribution screw.

5. The lignite processing system according to claim 4, It is characterized in that An aggregate trough is provided on the inner bottom wall of the aggregate bin, a spiral feed mechanism for conveying lignite is provided in the aggregate trough, and a conveying channel connected to the feed mechanism of the dryer is provided at the discharge end of the spiral feed mechanism.

6. The lignite processing system according to claim 5, It is characterized in that A second disturbance device for gathering the lignite in the aggregate trough is provided above the aggregate trough.

7. A lignite processing method using the lignite processing system according to claim 6, It is characterized in that The steps include: Loading: lignite is transported to the buffer silo for temporary storage through the loading device; Material distribution: The lignite in the buffer bin is gathered at the feeding end of the material distribution screw by the first disturbance device, and the material distribution screw is started to transport the lignite through the discharge channel and into the corresponding catalytic reactor; Catalytic reaction: after the lignite in the catalytic reactor reaches a corresponding amount, the material distribution screw is closed, and the feeding mechanism adds the lignite catalytic additive into the catalytic reactor, and the heating mechanism and the stirring mechanism are turned on at the same time, and the lignite mixed with the lignite catalytic additive is heated to 65°C to 95°C by the heating mechanism, and the lignite mixed with the lignite catalytic additive is stirred and mixed in the vertical direction; Feeding: opening the closed door, conveying the lignite mixed with the lignite catalytic additive to the aggregate bin, gathering the lignite in the aggregate trough through the second disturbance device, opening the spiral feeding mechanism, conveying the lignite mixed with the lignite catalytic additive to the conveying channel; Drying: The lignite mixed with the lignite catalytic additive is transported to the heating drum through the feeding mechanism. The lignite mixed with the lignite catalytic additive rolls with the heating drum and moves along the axial direction of the heating drum to its discharge end. The dried lignite is collected in the dry material bin.

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