A coal direct catalytic liquefaction production system

Abstract

The present invention discloses a direct catalytic coal liquefaction production system, including a drying type pulverizer and a liquefaction reactor, wherein the gas outlet of the liquefaction reactor is connected to a booster tank, the outlet end of the booster tank is connected to the powder chamber of the drying type pulverizer, the powder chamber is connected to the reaction chamber of the liquefaction reactor via the stirring feeding mechanism of the liquefaction reactor, and the liquid outlet of the liquefaction reactor is connected to a filter and a liquid storage tank in sequence; a steam water jacket is provided on the peripheral wall of the liquefaction reactor, and the steam outlet of the steam water jacket is connected to the grinding mechanism of the drying type pulverizer. The present invention utilizes the heat generated by the liquefaction reactor to heat and dry the coal during the process of coal crushing and grinding, and collects the gas (most of which is hydrogen) that has completed the reaction, and sprays the coal powder into the liquefaction reactor through this part of high-pressure hydrogen to complete the feeding operation of the coal powder, improve production efficiency, reduce operation steps, and realize effective use of heat. The present invention is applicable to the technical field of coal liquefaction.

Description

Technical Field

[0001] The invention belongs to the technical field of coal liquefaction, and in particular relates to a coal direct catalytic liquefaction production system. Background Art

[0002] At present, directly liquefying coal into liquid fuel is a relatively environmentally friendly means, which avoids direct combustion of coal and causes atmospheric pollution. The direct coal liquefaction process mainly grinds coal into powder, then adds the coal powder into the reactor, and at a predetermined temperature (about 450°C) and a predetermined pressure (about 20MPa), by adding a catalyst and hydrogenation, the coal powder reacts in the reactor to produce the required liquid fuel. Then, the solid, liquid and gas phases in the reactor are separated. At present, the second factor affecting the coal liquefaction reaction is the fineness and dryness of the coal powder. In this way, it is necessary to purchase grinding equipment and drying equipment separately. The ground coal powder needs to be dried and then put into the reactor. At the same time, the heat generated by the reactor cannot be fully utilized. Moreover, after the reaction is completed in the reactor, all materials in the reactor need to be removed, and then the coal powder is put into the reactor. In this way, air will be mixed in, and then hydrogenation needs to be added to replace this part of the air, which is troublesome to operate and affects production efficiency. Therefore, there is an urgent need for a coal direct catalytic liquefaction production system that can use the heat generated by the reactor to heat and dry the coal during the coal crushing and grinding process, and collect the gas that completes the reaction (most of which is hydrogen), and use this part of high-pressure hydrogen to spray the coal powder into the reactor to complete the coal powder feeding operation. Summary of the invention

[0003] The present invention provides a coal direct catalytic liquefaction production system, which is used to utilize the heat generated by the liquefaction reactor to heat and dry the coal during the coal crushing and grinding process, and collect the gas (most of which is hydrogen) that has completed the reaction. The coal powder is sprayed into the liquefaction reactor through this part of high-pressure hydrogen to complete the coal powder feeding operation, improve production efficiency, reduce operating steps, and realize effective use of heat.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A coal direct catalytic liquefaction production system comprises a drying type pulverizer and a liquefaction reactor, wherein the gas outlet of the liquefaction reactor is connected to a booster tank, and the outlet end of the booster tank is connected to a powder material chamber of the drying type pulverizer, the powder material chamber is connected to a reaction chamber of the liquefaction reactor via a catalyst box and a stirring feeding mechanism of the liquefaction reactor, and the liquid outlet of the liquefaction reactor is connected to a filter and a liquid storage tank in sequence; a steam water jacket is arranged on the outer peripheral wall of the liquefaction reactor, and the steam outlet of the steam water jacket is connected to a grinding mechanism of the drying type pulverizer and is used to heat the grinding mechanism to heat and dry the raw coal.

[0006] Furthermore, the grinding mechanism includes a vertically arranged assembly cylinder, in which a plurality of crushing and grinding rollers are arranged, the axis of each crushing and grinding roller extends in the vertical direction, and the lower end of each crushing and grinding roller is meshed with all adjacent crushing and grinding rollers, these crushing and grinding rollers are selectively connected to the driving mechanism, and each crushing and grinding roller is connected to the steam heating system.

[0007] Furthermore, the crushing grinding roller includes a roller body with crushing protrusions on the circumferential surface, and a grinding transmission blade extending spirally along its axis is constructed at the lower part of the roller body, and the grinding transmission blades of adjacent roller bodies are meshed with each other.

[0008] Furthermore, the radial length of the roller body increases downward along the vertical direction.

[0009] Furthermore, the driving mechanism includes a driving motor arranged below the powder chamber, and the powder chamber is located below the grinding mechanism. The output shaft of the driving motor is coaxially connected to a driving rod, and the driving rod extends upward in a vertical direction and is fixedly connected to the lower end of the corresponding crushing and grinding roller, and a plurality of disturbance rods are fixed to the portion of the driving rod located in the powder chamber.

[0010] Furthermore, the steam heating system includes a connecting sleeve rotatably mounted on the driving rod, the connecting sleeve is connected to the steam outlet of the steam water jacket via the steam inlet pipe thereon, and the connecting sleeve is connected to the steam distributor via a conducting channel opened on the driving rod, the steam distributor is rotatably connected to the driving rod, the steam distributor is respectively connected to the inner cavity of each crushing and grinding roller, a steam inlet joint is constructed at the lower end of each crushing and grinding roller, the steam inlet joint is rotatably connected to the steam distributor, and a connecting joint is constructed at the upper end of each crushing and grinding roller, one end of a plurality of steam outlet pipes are rotatably connected to the corresponding connecting joints, and the other end of the steam outlet pipe is connected to the steam outlet joint through a gathering sleeve.

[0011] Furthermore, the liquefaction reactor includes a reactor body, the steam water jacket is arranged outside the reactor body, an exhaust pipe is constructed at the upper end of the reactor body, the exhaust pipe is connected to the booster tank, a liquid discharge joint and a solid discharge joint are respectively constructed at the lower part and the bottom of the reactor body, and the stirring feeding mechanism is arranged in the reactor body; the liquid discharge joint is connected to the liquid storage tank through a filter.

[0012] Furthermore, the stirring feeding mechanism includes an axis tube with one end extending from the lower end of the reactor body along its axis into a position above the middle of the reactor body, a transmission wheel is installed at the lower end of the axis tube, and a plurality of distribution pipes are connected to the upper end of the axis tube, each of the distribution pipes is connected to a discharge pipe with an outlet end facing downward, and a pneumatic discharge valve is installed at the outlet end of each of the discharge pipes; a plurality of stirring blades are evenly arranged on the axis tube and located inside the reactor body along the circumference of the axis tube, and the lower end of the axis tube is connected to the discharge port of the powder cavity.

[0013] Furthermore, the pneumatic discharge valve includes a material guide seat assembled in the discharge pipe, and a shaft rod with one end extending out of the discharge pipe is slidably connected to the material guide seat, and the end of the shaft rod extending out of the discharge pipe passes through a sealing cover, and a locking nut is threadedly connected to the shaft rod, and the locking nut is screwed on the lower end surface of the sealing cover, and a telescopic spring is mounted on the outside of the shaft rod, and the two ends of the telescopic spring are respectively connected to the corresponding surfaces of the material guide seat and the sealing cover.

[0014] Furthermore, a material guide blade extending along its axis in a threaded manner is constructed at the lower part of the shaft tube, and a liquid guide sleeve with inner spiral blades is constructed at the lower part of the reactor body and located at the material guide blades. The material guide blades and the inner spiral blades are adapted to each other, and a liquid collecting sleeve is provided on the outer sleeve of the liquid guide sleeve, and the liquid outlet pipe of the liquid collecting sleeve is connected to the liquid storage tank through a filter.

[0015] Due to the adoption of the above structure, the technical progress achieved by the present invention compared with the prior art is that part of the heat of the liquefaction reactor of the present invention is used to heat the steam water jacket, so that the water in the steam water jacket generates hot steam, and the hot steam heats the grinding mechanism of the drying-type pulverizer, so that the grinding mechanism dries the moisture in the coal during the grinding process, and the ground coal is gathered in the powder cavity. In this way, when it is necessary to supply coal powder to the liquefaction reactor, the hydrogen collected in the booster tank is pressurized and passed into the powder cavity. Under the action of high-pressure hydrogen, the coal powder enters the liquefaction reactor along with the hydrogen. When there is too much hydrogen in the liquefaction reactor, part of the hydrogen is released into the booster tank. When there is too little hydrogen in the liquefaction reactor, A certain amount of hydrogen is supplemented; the catalyst of the present invention is generally pre-added into the catalyst box, and the hydrogen carries the catalyst and coal powder into the liquefaction reactor; when the coal powder completes the reaction in the liquefaction reactor, the hydrogen is discharged into the booster tank, the liquid fuel is discharged into the liquid storage tank, and the solid material is collected for subsequent utilization; in summary, the present invention can utilize the heat generated by the liquefaction reactor to heat and dry the coal during the process of coal crushing and grinding, and collect the gas that has completed the reaction (most of which is hydrogen), and the coal powder is sprayed into the liquefaction reactor through this part of high-pressure hydrogen, thereby completing the coal powder feeding operation. Therefore, the present invention improves production efficiency, reduces operating steps, and realizes effective utilization of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture:

[0018] Figure 1 is a process flow chart of an embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of a drying type grinding mill according to an embodiment of the present invention;

[0020] Figure 3 This is a structural front view of a drying type grinding mill according to an embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of an assembly cylinder in a drying type grinding mill according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the transmission connection of multiple crushing and grinding rollers in the drying type grinding mill according to an embodiment of the present invention;

[0023] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0024] Figure 7 It is a schematic diagram of the structure of the crushing and grinding roller in the drying type grinding mill according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic structural diagram of a drying type grinding machine according to an embodiment of the present invention after removing the feed hopper and the powder chamber;

[0026] Fig. 9 It is an axial structural cross-sectional view of the drying type grinding mill located at the powder material chamber in an embodiment of the present invention;

[0027] Fig.10 It is an axial structural cross-sectional view at the feed hopper of a drying-type grinding mill according to an embodiment of the present invention;

[0028] Fig.11 This is a schematic diagram of the structure of a liquefaction reactor according to an embodiment of the present invention;

[0029] Fig.12 for Fig.11 A magnified view of the structure of part A in the middle.

[0030] Labeled parts: 100-drying type grinding mill, 101-feed hopper, 102-grinding mechanism, 1021-assembly cylinder, 1022-meshing teeth, 1023-roller body, 1024-crushing protrusion, 1025-grinding transmission blade, 1026-steam inlet joint, 1027-connecting joint, 103-powder chamber, 1031-powder chamber body, 1032-inlet joint, 1033-discharge joint, 104-driving motor, 105-driving rod, 1051-conducting channel, 106-adapter, 1061-connecting sleeve, 1062-steam inlet pipe, 107-disturbance rod, 108-steam outlet assembly, 1081-steam outlet pipe, 1082-aggregation sleeve, 1083-steam outlet joint, 109-feeding net, 110-mounting seat, 111 -feeding port, 112-steam distributor, 1121-distribution sleeve, 1122-steam guide pipe, 200-liquefaction reactor, 201-reactor body, 202-exhaust pipe, 203-liquid guide sleeve, 204-solid discharge joint, 205-liquid collecting sleeve, 206-liquid discharge pipe, 207-liquid discharge joint, 208-shaft tube, 209-stirring blade, 210-material guide blade, 211-transmission wheel, 212-distribution pipe, 213-material discharge pipe, 214-material guide seat, 215-shaft rod, 216-sealing cover, 217-telescopic spring, 218-locking nut, 300-steam water jacket, 301-water supply joint, 302-discharge joint, 303-steam joint, 400-filter, 500-liquid storage tank, 600-boosting tank, 700-catalyst box. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] The present invention discloses a coal direct catalytic liquefaction production system, such as Figure 1As shown, it includes a drying type grinding mill 100, a liquefaction reactor 200, a booster tank 600, a catalyst box 700, and a liquid storage tank 500, wherein the gas outlet of the liquefaction reactor 200 is connected to the booster tank 600, and the outlet end of the booster tank 600 is connected to the powder chamber 103 of the drying type grinding mill 100, and the outlet of the powder chamber 103 is sequentially connected to the catalyst box 700, the stirring feeding mechanism of the liquefaction reactor 200 and the reaction chamber of the liquefaction reactor 200, and the liquid outlet of the liquefaction reactor 200 is sequentially connected to the filter 400 and the liquid storage tank 500 through a pipeline. In the present invention, a steam water jacket 300 is provided on the outer peripheral wall of the liquefaction reactor 200, and the steam outlet of the steam water jacket 300 is connected to the grinding mechanism 102 of the drying type grinding mill 100, and the steam enters the grinding mechanism 102 and is used to heat the grinding mechanism 102, thereby completing the heating and drying operation synchronously in the process of crushing and grinding the material coal. The working principle and advantages of the present invention are as follows: a part of the heat of the liquefaction reactor 200 of the present invention is used to heat the steam water jacket 300, so that the water in the steam water jacket 300 generates hot steam, and the hot steam heats the grinding mechanism 102 of the drying-type pulverizer 100, so that the grinding mechanism 102 dries the moisture in the coal during the grinding process, and the ground coal is gathered in the powder cavity 103. In this way, when it is necessary to supply coal powder to the liquefaction reactor 200, the hydrogen collected in the boosting tank 600 is pressurized and passed into the powder cavity 103. Under the action of high-pressure hydrogen, the coal powder enters the liquefaction reactor 200 along with the hydrogen. When there is too much hydrogen in the liquefaction reactor 200, a part of the hydrogen is released into the boosting tank 600. When there is too little hydrogen in the liquefaction reactor 200, A certain amount of hydrogen is supplemented; the catalyst of the present invention is generally pre-added into the catalyst box 700, and the hydrogen carries the catalyst and coal powder into the liquefaction reactor 200; when the coal powder completes the reaction in the liquefaction reactor 200, the hydrogen is discharged into the booster tank 600, the liquid fuel is discharged into the liquid storage tank 500, and the solid material is collected for subsequent utilization; in summary, the present invention can utilize the heat generated by the liquefaction reactor 200 to heat and dry the coal during the process of coal crushing and grinding, and collect the gas that has completed the reaction (most of which is hydrogen), and use this part of high-pressure hydrogen to spray the coal powder into the liquefaction reactor 200, thereby completing the coal powder feeding operation. Therefore, the present invention improves production efficiency, reduces operating steps, and realizes effective utilization of heat.

[0033] As a preferred embodiment of the present invention, Figure 2-10As shown, the grinding mechanism 102 includes an assembly barrel 1021 and a plurality of crushing and grinding rollers, wherein the assembly barrel 1021 is vertically arranged, all crushing and grinding rollers are assembled in the assembly barrel 1021, and the axis of each crushing and grinding roller extends in the vertical direction, and at the same time, the lower end of the crushing and grinding roller is meshed with all adjacent crushing and grinding rollers, and these crushing and grinding rollers are connected to the driving mechanism one by one, and each crushing and grinding roller is connected to the steam heating system. The working principle and advantage of this embodiment are: by controlling the driving mechanism, the driving mechanism drives the crushing and grinding roller connected thereto to rotate, and during the rotation of the crushing and grinding roller, the other crushing and grinding rollers are driven to rotate synchronously, so that the coal entering the assembly barrel 1021 is crushed, and is ground into powder at the meshing position of the crushing and grinding rollers, and the obtained coal powder falls into the powder material chamber 103. Moreover, in order to ensure that the coal material enters the assembly barrel 1021 smoothly, a feed hopper 101 is provided at the upper end of the assembly barrel 1021. A feeding net 109 is provided at the outlet end of the feed hopper 101, and the coal enters the assembly cylinder 1021 through the feeding net 109. When the coal is crushed by the grinding roller, the feeding net 109 can effectively prevent the coal from splashing. In order to ensure that the coal passes through the feeding net 109 smoothly, a vibrator is installed at the lower part of the outer wall of the feed hopper 101 in this embodiment. Moreover, the middle part of the feeding net 109 in this embodiment can adopt a concave shape, thereby reducing the coal on the feeding net 109 from bouncing too high due to the vibration of the vibrator. That is, by adopting a concave shape, the coal bounces in an inclined direction rather than a vertical direction, and thus will not escape from the feed hopper 101.

[0034] As a preferred embodiment of the present invention, Figure 5-7As shown, the crushing grinding roller includes a roller body 1023, the circumferential surface of which is covered with crushing protrusions 1024, and a grinding-type transmission blade 1025 is constructed at the lower part of the roller body 1023. The grinding-type transmission blade 1025 extends spirally along the axis of the roller body 1023, and the grinding-type transmission blades 1025 of adjacent roller bodies 1023 are meshed with each other, so that when one of the roller bodies 1023 is driven to rotate, the grinding-type transmission blades 1025 drive the other roller bodies 1023 to rotate, and the small-sized coal particles are gradually ground into fine powder when passing through the meshing grinding-type transmission blades 1025. In this embodiment, multiple groups of meshing teeth 1022 are constructed on the inner wall of the assembly cylinder 1021, and each group of meshing teeth 1022 is adapted to the corresponding grinding type transmission blade 1025, so that the coal particles with small particle size are gradually ground into fine powder when passing between the meshing teeth 1022 and the grinding type transmission blade 1025. In this embodiment, in order to make the raw coal gradually broken and ground from large particle size to small particle size after entering the assembly cylinder 1021 of the grinding mechanism 102, the measures taken are that the radial length of the roller body 1023 increases downward along the vertical direction, so that the grinding and crushing gap decreases from top to bottom. Due to this configuration, the splashing caused by the raw coal being directly ground into fine particles is also effectively avoided.

[0035] As a preferred embodiment of the present invention, Figure 8-9 As shown, the driving mechanism includes a driving motor 104, which is arranged below the powder chamber 103, and the powder chamber 103 is located below the grinding mechanism 102. In this embodiment, the output shaft of the driving motor 104 is coaxially connected with a driving rod 105, which extends upward in the vertical direction, and the driving rod 105 is fixedly connected to the lower end of the corresponding crushing and grinding roller. The driving motor 104 drives the driving rod 105 to rotate, so that the driving rod 105 drives the corresponding crushing and grinding roller to rotate, thereby achieving the purpose of synchronous rotation of multiple crushing and grinding rollers. In this embodiment, multiple disturbance rods 107 are fixed on the driving rod 105, and these disturbance rods 107 are located in the powder chamber 103. When it is necessary to supply coal powder to the liquefaction reactor 200, the driving rod 105 can be controlled to rotate, so that the disturbance rod 107 disturbs the coal powder in the powder chamber 103, so that the high-pressure hydrogen gas can bring the coal powder in the powder chamber 103 into the liquefaction reactor 200. The powder chamber 103 of this embodiment includes a powder chamber body 1031, on which an air inlet joint 1032 and a discharge joint 1033 are constructed, wherein the air inlet joint 1032 and the discharge joint 1033 are arranged relatively to each other, and the air inlet joint 1032 is lower than the discharge joint 1033, thereby ensuring that the coal powder is fully supplied to the liquefaction reactor 200.

[0036] As a preferred embodiment of the present invention, Figure 7-10As shown, the steam heating system includes an adapter 106, a steam distributor 112 and a steam outlet assembly 108, wherein the adapter 106 includes a connecting sleeve 1061 rotatably mounted on the driving rod 105, the connecting sleeve 1061 is connected to the steam outlet of the steam water jacket 300 through a steam inlet pipe 1062 thereon, and the connecting sleeve 1061 is connected to the steam distributor 112 through a conducting channel 1051 opened on the driving rod 105. The steam distributor 112 of this embodiment includes a distribution sleeve 1121 and a plurality of steam guide pipes 1122, the distribution sleeve 1121 is rotatably connected to the driving rod 105, all the steam guide pipes 1122 are connected to the distribution sleeve 1121, and each steam guide pipe 1122 is connected to the inner cavity of the corresponding crushing and grinding roller. In this embodiment, a steam inlet joint 1026 is configured at the lower end of each crushing and grinding roller, and the steam inlet joint 1026 is rotatably connected to a mounting seat 110 installed between the assembly barrel 1021 and the powder chamber 103. A discharge port 111 is provided on the mounting seat 110, and the ground coal powder enters the powder chamber 103 through the discharge port 111. In this embodiment, each steam inlet joint 1026 is rotatably connected to a corresponding steam guide pipe 1122, and a connection joint 1027 is configured at the upper end of each crushing and grinding roller. The steam outlet assembly 108 of this embodiment includes a gathering sleeve 1082, a steam outlet joint 1083 and a plurality of steam outlet pipes 1081, wherein one end of each steam outlet pipe 1081 is rotatably connected to the corresponding connection joint 1027, and the other end of the steam outlet pipe 1081 is connected to the steam outlet joint 1083 through the gathering sleeve 1082. The working principle and advantages of this embodiment are as follows: the steam passes through the adapter 106, the drive rod 105, and the steam distributor 112 in sequence and then enters the inner cavity of each crushing and grinding roller, thereby heating these crushing and grinding rollers synchronously, so that the crushing and grinding rollers complete the drying operation when crushing and grinding the coal. After passing through the crushing and grinding rollers, the steam enters each steam outlet pipe 1081, the gathering sleeve 1082 and the steam outlet joint 1083 in sequence, and is finally discharged.

[0037] As a preferred embodiment of the present invention, Figure 11-12 As shown, the liquefaction reactor 200 includes a reactor body 201, an exhaust pipe 202 is configured at the upper end of the reactor body 201, and the exhaust pipe 202 is connected to the boost tank 600. A liquid discharge joint 207 and a solid discharge joint 204 are respectively configured at the lower part and the bottom of the reactor body 201. The stirring feeding mechanism is arranged in the reactor body 201, and the liquid discharge joint 207 is connected to the liquid storage tank 500 through the filter 400. The steam water jacket 300 of this embodiment is sleeved outside the reactor body 201, wherein a water supply joint 301 and a discharge joint 302 are respectively configured at the upper part and the lower part of the peripheral wall of the steam water jacket 300, and a steam joint 303 is configured at the top of the steam water jacket 300, and the steam joint 303 is connected to the conducting channel 1051 of the driving rod 105 through a pipeline and an adapter 106.

[0038] As a preferred embodiment of the present invention, Fig.11 As shown, the stirring feeding mechanism includes a shaft tube 208, one end of which extends from the lower end of the reactor body 201 along its axis into a position above the middle of the reactor body 201, and a transmission wheel 211 is installed at the lower end of the shaft tube 208, and the shaft tube 208 is rotated by driving the transmission wheel 211. In this embodiment, a plurality of distribution pipes 212 are connected to the upper end of the shaft tube 208, wherein each distribution pipe 212 is connected to a discharge pipe 213 with an outlet end facing downward, and a pneumatic discharge valve is installed at the outlet end of the discharge pipe 213. In this embodiment, a plurality of stirring blades 209 are arranged on the shaft tube 208 and located in the reactor body 201, and these stirring blades 209 are evenly arranged along the circumference of the shaft tube 208, and the lower end of the shaft tube 208 is connected to the discharge port of the powder chamber 103. The working principle and advantages of this embodiment are as follows: when coal powder needs to be supplied to the reactor body 201, high-pressure hydrogen carries coal powder and catalyst through the shaft tube 208 into the distribution pipe 212, and then enters the reactor body 201 through the air pressure discharge valve on each discharge pipe 213, and at the same time, the shaft tube 208 is driven to rotate, so that the coal powder is evenly distributed in the reactor body 201. When the catalytic reaction is carried out in the reactor body 201, the shaft tube 208 is driven to rotate, so that the stirring blades 209 stir the materials in the reactor body 201, promote the reaction, and improve the efficiency.

[0039] As a preferred embodiment of the present invention, Fig.12 As shown, the pneumatic discharge valve includes a guide seat 214 assembled in the discharge pipe 213, and a shaft 215 is slidably connected to the guide seat 214, the end of the shaft 215 extends out of the discharge pipe 213, and one end of the shaft 215 extending out of the discharge pipe 213 passes through a sealing cover 216, a locking nut 218 is threadedly connected to the shaft 215, and the locking nut 218 is screwed on the lower end surface of the sealing cover 216, and a telescopic spring 217 is sleeved on the shaft 215, and the two ends of the telescopic spring 217 are respectively connected to the corresponding surfaces of the guide seat 214 and the sealing cover 216. Under the action of the high-pressure airflow carrying the material, the sealing cover 216 is pushed open, the telescopic spring 217 is in a stretched state, and the material enters the reactor body 201 through the discharge pipe 213. When the feeding is finished, under the action of the telescopic spring 217, the sealing cover 216 closes the port of the discharge pipe 213.

[0040] As a preferred embodiment of the present invention, in order to effectively separate the liquid product from the solid product after the reaction, the measures adopted are as follows: Fig.11As shown, a material guide blade 210 extending along its axis is constructed at the lower part of the shaft tube 208, and a liquid guide sleeve 203 is constructed at the lower part of the reactor body 201 and located at the material guide blade 210. The liquid guide sleeve 203 has an inner spiral blade, wherein the material guide blade 210 and the inner spiral blade are adapted to each other, and a liquid collecting sleeve 205 is provided on the outer shell of the liquid guide sleeve 203, and the liquid outlet pipe 206 of the liquid collecting sleeve 205 is connected to the liquid storage tank 500 through the filter 400. In this embodiment, when the reaction is carried out, the shaft tube 208 is driven to rotate in the reverse direction to prevent the guide blades 210 from guiding the material in the reactor body 201 downward. When the reaction is completed and the gas and liquid in the reactor body 201 are discharged, the solid discharge joint 204 is opened and the shaft tube 208 is driven to rotate in the forward direction to make the solid product in the reactor body 201 move downward. When the solid product moves to the liquid guide sleeve 203, the liquid product in the solid product enters the liquid collecting sleeve 205 through the liquid guide sleeve 203 under the squeezing of the guide blades 210 and the inner spiral blades. Moreover, as the shaft tube 208 continues to rotate, the dehydrated solid product is discharged through the solid discharge joint 204.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A coal direct catalytic liquefaction production system, characterized in that: It comprises a drying type grinding mill and a liquefaction reactor, wherein the gas outlet of the liquefaction reactor is connected with a booster tank, and the outlet end of the booster tank is connected with the powder material chamber of the drying type grinding mill, and the powder material chamber is connected with the reaction chamber of the liquefaction reactor through a catalyst box and a stirring feeding mechanism of the liquefaction reactor, and the liquid outlet of the liquefaction reactor is connected with a filter and a liquid storage tank in sequence; a steam water jacket is arranged on the outer peripheral wall of the liquefaction reactor, and the steam outlet of the steam water jacket is connected with the grinding mechanism of the drying type grinding mill and is used to heat the grinding mechanism to heat and dry the raw coal; The grinding mechanism comprises a vertically arranged assembly cylinder, in which a plurality of crushing and grinding rollers are arranged, the axis of each crushing and grinding roller extends in a vertical direction, and the lower end of each crushing and grinding roller is meshed with all adjacent crushing and grinding rollers, one of the crushing and grinding rollers is connected to a driving mechanism, and each crushing and grinding roller is connected to a steam heating system; The driving mechanism comprises a driving motor arranged below the powder material chamber, the powder material chamber is located below the grinding mechanism, the output shaft of the driving motor is coaxially connected with a driving rod, the driving rod extends upward in a vertical direction and is fixedly connected to the lower end of the corresponding crushing and grinding roller, and a plurality of disturbance rods are fixed on the portion of the driving rod located in the powder material chamber; The steam heating system includes a connecting sleeve rotatably mounted on the driving rod, the connecting sleeve is connected to the steam outlet of the steam water jacket via the steam inlet pipe thereon, and the connecting sleeve is connected to the steam distributor via a conducting channel opened on the driving rod, the steam distributor is rotatably connected to the driving rod, the steam distributor is respectively connected to the inner cavity of each crushing and grinding roller, a steam inlet joint is constructed at the lower end of each crushing and grinding roller, and the steam inlet joint is rotatably connected to the steam distributor.

2. A coal direct catalytic liquefaction production system according to claim 1, characterized in that: The crushing grinding roller comprises a roller body with crushing protrusions all over the circumferential surface, and a grinding transmission blade extending spirally along the axis of the roller body is constructed at the lower part of the roller body, and the grinding transmission blades of adjacent roller bodies are meshed with each other.

3. A coal direct catalytic liquefaction production system according to claim 2, characterized in that: The radial length of the roller body increases downward along the vertical direction.

4. A coal direct catalytic liquefaction production system according to claim 1, characterized in that: A connecting joint is constructed at the upper end of each crushing and grinding roller, one end of a plurality of steam outlet pipes is rotatably connected to the corresponding connecting joints, and the other end of the steam outlet pipe is connected to the steam outlet joint through a gathering sleeve.

5. A coal direct catalytic liquefaction production system according to claim 1, characterized in that: The liquefaction reactor comprises a reactor body, the steam water jacket is arranged outside the reactor body, an exhaust pipe is constructed at the upper end of the reactor body, the exhaust pipe is connected with the booster tank, a liquid discharge joint and a solid discharge joint are respectively constructed at the lower part and the bottom of the reactor body, and the stirring feeding mechanism is arranged in the reactor body; the liquid discharge joint is connected with the liquid storage tank through a filter.

6. A coal direct catalytic liquefaction production system according to claim 5, characterized in that: The stirring feeding mechanism comprises an axis tube whose one end extends from the lower end of the reactor body along its axis into a position above the middle of the reactor body, a transmission wheel is installed at the lower end of the axis tube, and a plurality of distribution pipes are connected to the upper end of the axis tube, each of the distribution pipes is connected to a discharge pipe with an outlet end facing downward, and a pneumatic discharge valve is installed at the outlet end of each of the discharge pipes; a plurality of stirring blades are evenly arranged on the axis tube and located in the reactor body along the circumference of the axis tube, and the lower end of the axis tube is connected to the discharge port of the powder cavity.

7. A coal direct catalytic liquefaction production system according to claim 6, characterized in that: The pneumatic discharge valve includes a material guide seat assembled in the discharge pipe, a shaft rod with one end extending out of the discharge pipe is slidably connected to the material guide seat, and the end of the shaft rod extending out of the discharge pipe passes through a sealing cover, a locking nut is threadedly connected to the shaft rod, the locking nut is screwed onto the lower end surface of the sealing cover, a telescopic spring is sleeved on the outside of the shaft rod, and the two ends of the telescopic spring are respectively connected to the corresponding surfaces of the material guide seat and the sealing cover.

8. A coal direct catalytic liquefaction production system according to claim 6, characterized in that: A material guide blade extending along the axis of the shaft tube is constructed at the lower part, and a liquid guide sleeve with inner spiral blades is constructed at the lower part of the reactor body and located at the material guide blades. The material guide blades and the inner spiral blades are adapted to each other. A liquid collecting sleeve is arranged on the outer sleeve of the liquid guide sleeve, and the liquid outlet pipe of the liquid collecting sleeve is connected to the liquid storage tank through a filter.

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