CN110760327B - Coal liquefaction plant and process - Google Patents

Abstract

The invention relates to the technical field of coal liquefaction, and particularly discloses a coal liquefaction device and a coal liquefaction process. The device comprises a gas storage tank for storing inert gas, wherein both ends of the gas storage tank are provided with a pulverized coal storage tank, a first connecting pipe for connecting the gas storage tank and the pulverized coal storage tank is arranged between the pulverized coal storage tank and the gas storage tank, and the first connecting pipe is provided with a pumping mechanism for conveying gas in the gas storage tank and the pulverized coal storage tank; the gasification furnace is arranged below the gas storage tank, a second connecting pipe used for connecting the pulverized coal storage tank and the gasification furnace is arranged between the pulverized coal storage tank and the gasification furnace, and a first valve is arranged on the second connecting pipe. The coal liquefaction device can continuously add pulverized coal into the gasification furnace, and avoids the discharge of inert gas into the air, thereby saving the production cost and avoiding the pollution to the environment.

Description

Coal liquefaction plant and process

technical field

The invention relates to the technical field of coal liquefaction, in particular to a coal liquefaction device and a process.

Background technique

Coal liquefaction is a technology that converts solid coal into liquid products (liquid hydrocarbon fuels, such as gasoline, diesel and other products or chemical raw materials) through chemical processing. Coal liquefaction can remove harmful elements such as sulfur and ash to obtain clean secondary energy, which is of great strategic significance for optimizing the terminal energy structure, solving oil shortages and reducing environmental pollution.

Coal liquefaction and feeding are usually carried out in the lock hopper. First, the coal is added to the lock hopper, then the lock hopper is closed and the inert gas is filled into the lock hopper so that the air pressure in the lock hopper is the same as the pressure of the gasifier, and then the coal is transported into the lock hopper. In the gasifier, then close the valve between the lock hopper and the gasifier, and discharge the inert gas from the lock hopper for the next feeding. Such a feeding method is not only inefficient, but also emits a large amount of nitrogen and carbon dioxide into the air, which is not environmentally friendly.

SUMMARY OF THE INVENTION

Aiming at the defects of low feeding efficiency and environmental pollution in the coal liquefaction process existing in the prior art, the present invention provides a coal liquefaction device and a process. It can achieve the effect of improving the feeding efficiency of pulverized coal and avoiding environmental pollution.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions:

A coal liquefaction device includes a gas storage tank for storing inert gas, both ends of the gas storage tank are provided with pulverized coal storage tanks, the upper end of the pulverized coal storage tank is connected with a crushing mechanism, and the crushing mechanism includes a crushing kettle, and the crushing mechanism includes a crushing kettle. A feeding pipeline is connected between the kettle and the pulverized coal storage tank. The crushing kettle is provided with a crushing cavity. The crushing cavity is provided with a number of supporting plates arranged at intervals along the height direction of the crushing cavity. The center of the crushing cavity is provided with a rotatable A rotating shaft, there are several rotating plates on the rotating shaft for cooperating with the supporting plate, and the supporting plate and the rotating plate are both provided with through holes for passing through the pulverized coal; between the pulverized coal storage tank and the gas storage tank There is a first connecting pipe for connecting the gas storage tank and the pulverized coal storage tank, and a pumping mechanism for transporting the gas in the gas storage tank and the pulverized coal storage tank is arranged on the first connecting pipe; A second connecting pipe for connecting the pulverized coal storage tank and the gasifier is arranged between the pulverized coal storage tank and the gasifier, and the second connecting pipe is provided with a first valve.

The arrangement of the gas storage tank and the pulverized coal storage tanks at both ends of the present invention enables the coal liquefaction device to continuously add pulverized coal to the gasifier, thereby better improving the efficiency of coal liquefaction. At the same time, the emission of inert gas into the air is also avoided, thereby saving production costs and avoiding environmental pollution.

Among them, the setting of the crushing mechanism enables the crushing kettle to continuously produce pulverized coal, and also enables the pulverized coal produced by the crushing mechanism to be conveniently transported to the pulverized coal storage tank, thereby better improving the production of the coal liquefaction device. efficiency.

Preferably, the pumping mechanism includes a U-shaped connecting pipe arranged on the first connecting pipe and two ends of which are connected with the first connecting pipe, and the first connecting pipe is located at the connection between the U-shaped connecting pipe and the first connecting pipe. There is a third connecting pipe connected with the U-shaped connecting pipe, and a first air pump is arranged on the third connecting pipe; There are a second valve and a third valve, the second valve is arranged near the pulverized coal storage tank, and the third valve is arranged near the gas storage tank; the first connecting pipe is provided with a valve between the third connecting pipe and the first connecting pipe. The fourth valve and the fifth valve at both ends of the connection, the fourth valve is arranged between the connection between the third connection pipe and the first connection pipe and the connection between the U-shaped connection pipe and the first connection pipe and is close to the pulverized coal storage tank The fifth valve is arranged between the connection between the third connection pipe and the first connection pipe and the connection between the U-shaped connection pipe and the first connection pipe and is close to the gas storage tank.

In the present invention, through the setting of the pumping mechanism, when the gas storage tank and the pulverized coal storage tank are flushed and released, the air pressure in the pulverized coal storage tank and the gas storage tank can be made the same through the communication of the pipeline first, avoiding the need for The first air pump is directly used to exchange the air pressure of the pulverized coal storage tank and the gas storage tank, thereby avoiding the damage of the first air pump due to excessive gas pressure, thereby better improving the stability of the coal liquefaction device.

Preferably, the first connecting pipe is provided with a filter device located between the pumping mechanism and the pulverized coal storage tank, the filter device includes a filter screen mounting seat, and a filter screen mounting cavity is provided in the filter screen mounting seat, and the filter screen mounting cavity is There are several groups of card slots, the first filter screen is clipped in the card slots, and the upper end of the filter screen installation seat is provided with a filter screen installation cavity cover plate for sealing the filter screen installation cavity.

In the present invention, through the arrangement of the filtering mechanism, the pulverized coal in the first connecting pipe can be filtered, so as to avoid the pulverized coal entering the first air pump and causing damage to the first air pump, thereby better improving the coal in this embodiment. Stability of liquefaction plants.

Preferably, the bottom surface of the filter screen installation cavity is recessed downward to form a filter screen installation step, and the filter screen installation step is provided with a second filter screen arranged perpendicular to the first filter screen and used for supporting the first screen The bottom end of the net is provided with a pulverized coal storage cavity which is in the shape of a rounded table as a whole.

In the present invention, through the arrangement of the second filter screen and the pulverized coal storage, the pulverized coal in the filter screen installation cavity can be dropped into the pulverized coal storage cavity, thereby facilitating the collection of the pulverized coal in the filter device.

Preferably, a fourth connecting pipe for connecting the pulverized coal storage tank and the screen mounting seat is provided between the pulverized coal storage tank and the filter screen mounting seat, and the end of the fourth connecting pipe is connected with the pulverized coal storage cavity, and the fourth connecting pipe is A sixth valve is arranged on the connecting pipe.

In the present invention, through the arrangement of the fourth connecting pipe and the sixth valve, the sixth valve can be opened when the pulverized coal storage tank is pressurized, so that the pulverized coal in the pulverized coal storage cavity can pass through the fourth connecting pipe It is transported to the pulverized coal storage tank, thereby facilitating the recycling of pulverized coal in the pulverized coal storage cavity.

Preferably, a pressure relief device is provided on the first connecting pipe between the filter device and the U-shaped connecting pipe. The pressure relief device includes a tubular pressure relief pipe, and an inner pipe is arranged in the pressure relief pipe. The outer wall of the pipe forms a pressure relief cavity, and the outer side wall at the center of the inner pipe is provided with a first annular mounting plate fixedly connected to the inner side wall of the pressure relief pipe, and the first annular mounting plate divides the pressure relief cavity into two relatively independent spaces The center of the inner pipe is provided with a second annular mounting plate, and the outer side wall of the inner pipe is provided with a number of air guide holes evenly distributed along the axis of the inner pipe near the end of the second annular mounting plate. There is a sliding column, the end of the sliding column close to the second annular mounting plate is provided with a blind hole, the inner tube is provided with a spring, one end of the spring abuts against the blind hole, and the other end of the spring abuts against the second annular mounting plate The openings at both ends of the inner tube are provided with baffles for blocking the sliding column, and the center of the baffles is provided with a baffle through hole.

In the present invention, the setting of the pressure relief device can avoid the vibration of the pipeline caused by the rapid change of pressure during the exchange of the inert gas between the pulverized coal storage tank and the gas storage pipe, thereby improving the use of the coal liquefaction device. time stability.

Preferably, the side wall of the crushing cavity is provided with a number of strip-shaped grooves arranged along the height direction of the crushing cavity, the side wall of the crushing cavity is provided with a number of annular grooves arranged along the height direction of the crushing cavity, and the support plate is provided with The strip grooves and the annular grooves are matched with the protrusions.

In the present invention, through the arrangement of the strip-shaped groove, the annular groove and the convex block, the convex block on the supporting plate can be placed in the strip-shaped groove during the installation of the supporting plate, and then the supporting plate can be moved. When moving to the annular groove, the support plate is rotated, so that the protrusions are screwed into the annular groove, so that the installation of the support plate is more convenient.

Preferably, the side wall of the rotating shaft is provided with a number of rotating plate clamping slots arranged along the height direction, the center of the rotating plate is provided with a rotating plate through hole that fits with the rotating shaft, and the inner wall of the rotating plate through hole is provided with The clamping block matched with the clamping groove of the rotating plate; the side wall of the crushing kettle is provided with a limit hole passing through the annular groove, the convex block is provided with a convex block through hole matched with the limit hole, and the limit hole is provided with a limit hole. Limit levers that pass through the through holes of the bumps.

In the present invention, through the arrangement of the limit hole, the through hole of the bump, and the limit rod, the support plate can be limited by the cooperation of the limit rod and the through hole of the bump, so as to avoid the rotation of the support plate during use, thereby preventing the support plate from rotating during use. The stability of the coal liquefaction device in use is improved.

Preferably, the upper end of the crushing kettle is provided with a crushing kettle cover for sealing the crushing cavity, the crushing kettle cover is provided with a motor for driving the rotating shaft; the crushing kettle cover is provided with several uniform feeding ports.

In the present invention, through the setting of the feeding port and the crushing kettle cover, when the coal is crushed, coal can be continuously added to the crushing cavity through the feeding port, so that the crushing kettle can continuously carry out the coal crushing process. broken.

The present invention also provides a liquefaction process based on any of the above-mentioned coal liquefaction devices, which comprises the following steps:

Step 1, open the discharge port of the crushing kettle on one of the pulverized coal storage tanks, so that the pulverized coal in the crushing kettle enters the pulverized coal storage tank connected with it through the feeding pipeline;

Step 2: When the pulverized coal in the pulverized coal storage tank is accumulated to a certain amount, the power supply of the pumping mechanism is turned on to fill the inert gas in the gas storage tank into the pulverized coal storage tank. When the pressure in the pulverized coal storage tank is equal to When the pressure of the gasifier is the same, the first valve is opened, so that the pulverized coal in the pulverized coal storage tank falls into the gasifier and liquefies in the gasifier;

Step 3: When the pulverized coal in the pulverized coal storage tank is transported to the gasifier, open the feeding port of the upper crushing kettle in the pulverized coal storage tank previously added with pulverized coal, so that the pulverized coal in the crushing kettle enters the pulverized coal. In the coal storage tank, when the pulverized coal in the pulverized coal storage tank is completely discharged into the gasifier, the addition of the pulverized coal in the other pulverized coal storage tank is completed. The pressure is equal to the pressure in the two adjacent pf storage tanks;

Step 4: Adjust the closing of the valve on the pumping mechanism, and then reduce the medium pressure of the pulverized coal storage tank for emptying pulverized coal to atmospheric pressure through the action of the pumping mechanism, so that the pressure of the pulverized coal storage tank filled with pulverized coal is the same as the gas pressure. The furnace is equal;

Step 5: Repeat the operations from Step 1 to Step 4 in sequence.

Description of drawings

FIG. 1 is a schematic structural diagram of the coal liquefaction device in Example 1. FIG.

FIG. 2 is an enlarged view of part A in Example 1. FIG.

FIG. 3 is a cross-sectional view of the filter device of FIG. 1 .

FIG. 4 is a schematic structural diagram of the pressure relief device in FIG. 1 .

FIG. 5 is a cross-sectional view of the pressure relief device of FIG. 4 .

FIG. 6 is a cross-sectional view of the crushing kettle in FIG. 1 .

FIG. 7 is a schematic structural diagram of the support plate in FIG. 6 .

FIG. 8 is a schematic structural diagram of the crushing chamber in FIG. 6 .

FIG. 9 is a schematic structural diagram of the rotating shaft in FIG. 6 .

FIG. 10 is a schematic structural diagram of the rotating plate in FIG. 6 .

The names of the parts referred to by the numerals in the accompanying drawings are as follows:

110, gas storage tank; 111, second gas pump; 120, pulverized coal storage tank; 121, crushing kettle; 122, feed pipeline; 130, first connecting pipe; 140, gasifier; 150, second connecting pipe; 151, the first valve; 160, the U-shaped connecting pipe; 170, the filter screen mounting seat; 180, the fourth connecting pipe; 181, the sixth valve; 190, the pressure relief pipe; 210, the third connecting pipe; 220, the first Air pump; 230, second valve; 240, third valve; 250, fourth valve; 260, fifth valve; 310, filter installation cavity; 320, card slot; 330, first filter; 340, filter installation Cavity cover; 350, filter screen installation step; 360, second filter screen; 370, pulverized coal storage cavity; 410, inner pipe; 420, connecting seat; 421, connecting seat through hole; 510, pressure relief chamber; 520, 530, second annular mounting plate; 540, air guide hole; 550, sliding column; 551, blind hole; 560, spring; 570, baffle; 571, baffle through hole; 610, crushing cavity; 620, supporting plate; 630, rotating shaft; 640, rotating plate; 650, crushing kettle cover plate; 651, feeding port; 660, motor; 710, material passing hole; 720, bump; 721, bump through hole; 810, strip groove; 820, annular groove; 830, limit hole; 840, limit rod; 910, rotating plate slot; 1010, rotating plate through hole;

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and not for limiting.

Example 1

As shown in FIGS. 1-10 , this embodiment provides a coal liquefaction device, which includes a gas storage tank 110 for storing inert gas. Both ends of the gas storage tank 110 are provided with pulverized coal storage tanks 120 . A crushing mechanism is connected to the upper end of the coal storage tank 120. The crushing mechanism includes a crushing kettle 121. A feeding pipeline 122 is connected between the crushing kettle 121 and the pulverized coal storage tank 120. There are a number of support plates 620 spaced along the height direction of the crushing cavity 610, a rotatable rotating shaft 630 is arranged at the center of the crushing cavity 610, and a number of rotating plates 640 are arranged on the rotating shaft 630 for cooperating with the support plates 620, Both the support plate 620 and the rotating plate 640 are provided with through holes 710 for passing through the pulverized coal; between the pulverized coal storage tank 120 and the gas storage tank 110 is provided for connecting the gas storage tank 110 and the pulverized coal storage tank 120 The first connecting pipe 130 is provided with a pumping mechanism for transporting the gas in the gas storage tank 110 and the pulverized coal storage tank 120; a gasifier 140 is arranged below the gas storage tank 110, and the pulverized coal is stored A second connection pipe 150 for connecting the pulverized coal storage tank 120 and the gasifier 140 is provided between the tank 120 and the gasifier 140 , and a first valve 151 is provided on the second connection pipe 150 .

Through the arrangement of the gas storage tank 110 and the pulverized coal storage tanks 120 at both ends in this embodiment, when adding pulverized coal, the staff can control the pumping mechanism to make the two pulverized coal storage tanks 120 in different working states , that is, when one pulverized coal storage tank 120 is in the state of adding pulverized coal to the gasifier, the other pulverized coal storage tank 120 is in the state of filling pulverized coal; The pulverized coal is added to improve the efficiency of coal liquefaction. At the same time, after the pulverized coal in the pulverized coal storage tank 120 is filled, the staff can pump the inert gas in the pulverized coal storage tank 120 to the gas storage tank 110 through the pumping mechanism, so as to avoid discharging the inert gas into the air , thereby not only saving production costs, but also avoiding environmental pollution. The setting of the crushing mechanism enables the crushing kettle 121 to continuously produce pulverized coal, and also enables the pulverized coal produced by the crushing mechanism to be conveniently transported to the pulverized coal storage tank 120, thereby better improving the production of the coal liquefaction device. efficiency.

In this embodiment, the pumping mechanism includes a U-shaped connecting pipe 160 disposed on the first connecting pipe 130 and connected to the first connecting pipe 130 at both ends. The first connecting pipe 130 is located between the U-shaped connecting pipe 160 and the first connecting pipe 130 A third connecting pipe 210 connected to the U-shaped connecting pipe 160 is provided between the joints of a connecting pipe 130, and the third connecting pipe 210 is provided with a first air pump 220; the U-shaped connecting pipe 160 is located on the U-shaped connecting pipe The two ends of the connection between the 160 and the third connecting pipe 210 are respectively provided with a second valve 230 and a third valve 240, the second valve 230 is arranged near the pulverized coal storage tank 120, and the third valve 240 is arranged near the gas storage tank. 110; the first connecting pipe 130 is provided with a fourth valve 250 and a fifth valve 260 at both ends of the connection between the third connecting pipe 210 and the first connecting pipe 130, and the fourth valve 250 is arranged between the third connecting pipe 210 and the Between the connection of the first connection pipe 130 and the connection of the U-shaped connection pipe 160 and the first connection pipe 130 and close to the end of the pulverized coal storage tank 120; the fifth valve 260 is arranged between the third connection pipe 210 and the first connection pipe 130 is between the connection point and the connection point between the U-shaped connection pipe 160 and the first connection pipe 130 and is close to the gas storage tank 110 .

Through the configuration of the pumping mechanism in this embodiment, when pressurizing the pulverized coal storage tank 120, the fourth valve 250 and the fifth valve 260 can be opened first, so that the second valve 230 and the third valve 240 are closed state, the inert gas in the gas storage tank 110 will flow toward the pulverized coal storage tank 120. When the pressure in the gas storage tank 110 is equal to the pressure in the pulverized coal storage tank 120, the third valve 240 is opened and the fourth valve 240 is closed. The valve 250 turns on the power supply of the first air pump 220, and continues to charge the inert gas in the gas storage tank 110 into the pulverized coal storage tank 120 until the pressure in the pulverized coal storage tank 120 is the same as the pressure in the gasifier 140; when After the pulverized coal is transported in the pulverized coal storage tank 120, the second valve 230 and the third valve 240 are opened, so that the fourth valve 250 and the fifth valve 260 are closed, and the inert gas in the pulverized coal storage tank 120 will will flow into the gas storage tank 110, when the pressure in the pulverized coal storage tank 120 is the same as the pressure in the gas storage tank 110, open the fourth valve 250, close the fifth valve 260, and turn on the power of the first gas pump 220, The inert gas in the pulverized coal storage tank 120 can be pumped into the gas storage tank 110 until the gas pressure in the pulverized coal storage tank 120 is the same as the atmospheric pressure. Through the setting of the pumping mechanism, when the gas storage tank 110 and the pulverized coal storage tank 120 are flushed and released, the air pressure in the pulverized coal storage tank 120 and the gas storage tank 110 can be made the same through the connection of the pipeline, avoiding the need for The first air pump 220 is directly used to exchange the air pressure of the pulverized coal storage tank 120 and the gas storage tank 110, thereby avoiding the damage of the first air pump 220 due to the high gas pressure, thereby better improving the stability of the coal liquefaction device. sex.

In this embodiment, the first connecting pipe 130 is provided with a filter device located between the pumping mechanism and the pulverized coal storage tank 120 , the filter device includes a filter screen mounting seat 170 , and a filter screen mounting cavity is provided in the filter screen mounting seat 170 310, a plurality of groups of card slots 320 are arranged in the filter screen installation cavity 310, the first filter screen 330 is clipped in the card slots 320, and the upper end of the filter screen installation seat 170 is provided with a filter for sealing the filter screen installation cavity 310. Mesh mounting cavity cover 340.

Through the arrangement of the filtering mechanism in this embodiment, the pulverized coal in the first connecting pipe 130 can be filtered, so as to prevent the pulverized coal from entering the first air pump 220 and cause damage to the first air pump 220, thereby better improving the Stability of Coal Liquefaction Plants in Examples.

In this embodiment, the bottom surface of the filter screen installation cavity 310 is recessed downward to form a filter screen installation step 350 . The second filter screen 360, the bottom end of the second filter screen 360 is provided with a pulverized coal storage cavity 370 in the shape of a rounded cone as a whole.

Through the arrangement of the second filter screen 360 and the pulverized coal storage cavity 370 in this embodiment, the pulverized coal in the filter screen installation cavity 310 can be dropped into the pulverized coal storage cavity 370, thereby facilitating the processing of the pulverized coal in the filter device. coal is collected.

In this embodiment, a fourth connecting pipe 180 for connecting the pulverized coal storage tank 120 and the filter screen mounting seat 170 is provided between the pulverized coal storage tank 120 and the filter screen mounting seat 170 . The coal storage chamber 370 is connected, and the fourth connecting pipe 180 is provided with a sixth valve 181 .

Through the arrangement of the fourth connecting pipe 180 and the sixth valve 181 in this embodiment, when the pulverized coal storage tank 120 is pressurized, the sixth valve 181 can be opened, so that the pulverized coal in the pulverized coal storage cavity 370 can be opened. The pulverized coal can be transported to the pulverized coal storage tank 120 through the fourth connecting pipe 180 , thereby facilitating the recycling of pulverized coal in the pulverized coal storage cavity 370 .

In this embodiment, a pressure relief device is provided on the first connecting pipe 130 between the filter device and the U-shaped connecting pipe 160 . The pressure relief device includes a tubular pressure relief pipe 190 , and an inner pipe 410 is arranged in the pressure relief pipe 190 . , the inner wall of the pressure relief pipe 190 and the outer wall of the inner pipe 410 form a pressure relief cavity 510, and the outer side wall at the center of the inner pipe 410 is provided with a first annular mounting plate 520 fixedly connected to the inner side wall of the pressure relief pipe 190. The plate 520 separates the pressure relief chamber 510 into two relatively independent spaces; the center of the inner pipe 410 is provided with a second annular mounting plate 530, and the outer side wall of the inner pipe 410 is provided with a plurality of annular mounting plates 530 near the end. Air guide holes 540 are evenly distributed along the axis direction of the inner tube 410 at intervals. The inner tube 410 is slidably provided with a sliding column 550. The end of the sliding column 550 close to the second annular mounting plate 530 is provided with a blind hole 551. 410 is provided with a spring 560, one end of the spring 560 abuts against the blind hole 551, and the other end of the spring 560 abuts on the second annular mounting plate 530; the openings at both ends of the inner tube 410 are provided with a pair of sliding posts 550. The baffle 570 for blocking has a baffle through hole 571 at the center of the baffle 570 .

Through the setting of the pressure relief device in this embodiment, when the gas exchange between the pulverized coal storage tank 120 and the gas storage tank 110 is performed, the inert gas can enter from the cavity on the side between the inner pipe 410 and the pressure relief pipe 190, The air flows into the inner tube 410 through the air guide hole 540 on one side of the second annular mounting plate 530 , and then flows out through the air guide hole 540 on the other side of the second annular installation plate 530 through the second annular installation plate 530 of the inner tube 410 . When the sliding column 550 is under pressure, the sliding column 550 will move toward one side of the second annular mounting plate 530 to block the air guide hole 540, so as to reduce the gas flow rate, thereby avoiding the need for the pulverized coal storage tank 120 and the gas When the inert gas is exchanged between the storage pipes 110, the pipes vibrate due to the rapid change of pressure, thereby improving the stability of the coal liquefaction device in use.

In this embodiment, the baffle plate 570 is connected with the inner wall of the inner pipe 410 by threads.

The threaded connection between the baffle plate 570 and the inner pipe 410 in this embodiment facilitates the installation of the baffle plate 570 and the replacement of the sliding column 550 and the spring 560, thereby facilitating routine maintenance.

In this embodiment, both ends of the pressure relief pipe 190 expand outward along the circumference thereof to form a connection seat 420 , and the connection seat 420 is provided with a plurality of evenly distributed connection seat through holes 421 .

Through the arrangement of the connecting seat through hole 421 in this embodiment, when the pressure relief device is installed, the pressure relief device can be installed on the first connecting pipe 130 through the bolt passing through the connecting seat through hole 421 , so that the installation of the pressure relief device is more convenient.

In this embodiment, the gas storage tank 110 is connected with a second air pump 111 for pumping the inert gas into the gas storage tank.

With the arrangement of the second air pump 111 in this embodiment, after a small amount of inert gas enters the gasifier 140 through the pulverized coal storage tank 120 and the second connecting pipe 150 and is discharged through the gasifier 140 , it can pass through the second air pump 111 The inert gas is pumped into the gas storage tank 111, thereby improving the stability of the coal liquefaction device in use.

In this embodiment, the side wall of the crushing cavity 610 is provided with a plurality of strip-shaped grooves 810 arranged along the height direction of the crushing cavity 610 , and the side wall of the crushing cavity 610 is provided with a number of annular grooves arranged along the height direction of the crushing cavity 610 820 , the support plate 620 is provided with a protrusion 720 matched with the strip groove 810 and the annular groove 820 .

Through the arrangement of the strip grooves 810 , the annular grooves 820 and the protrusions 720 in this embodiment, when the support plate 620 is installed, the protrusions 720 on the support plate 620 can be placed in the strip grooves 810 . Then, the support plate 620 is moved, and when the support plate 620 moves to the annular groove 820 , the support plate 620 is rotated so that the protrusions 720 are screwed into the annular groove 820 , so that the installation of the support plate 620 is more convenient.

In this embodiment, the side wall of the rotating shaft 630 is provided with a plurality of rotating plate clamping grooves 910 arranged along its height direction, and the rotating plate through hole 1010 is provided at the center of the rotating plate 640 for clearance fit with the rotating shaft 630. The inner wall of the hole 1010 is provided with a clamping block 1020 which is matched with the rotating plate clamping groove 910; the side wall of the crushing kettle 121 is provided with a limiting hole 830 passing through the annular groove 820, and the convex block 720 is provided with a limiting hole 830 is matched with the through hole 721 of the bump, and the limit hole 830 is provided with a limit rod 840 passing through the through hole 721 of the bump.

Through the arrangement of the limit hole 830 , the through-hole 721 of the bump and the limit rod 840 in this embodiment, the support plate 620 can be limited by the cooperation of the limit rod 840 and the through hole 721 of the bump, avoiding the need for the support plate The 620 rotates during use, thereby improving the stability of the coal liquefaction device during use.

In this embodiment, the crushing kettle cover 650 for sealing the crushing cavity 610 is provided on the upper end of the crushing kettle 121 , and the crushing kettle cover 650 is provided with a motor 660 for driving the rotating shaft 630 ; the crushing kettle cover 650 is provided with Several uniform feed ports 651 .

Through the setting of the feeding port 651 and the crushing kettle cover plate 650 in this embodiment, when coal is crushed, coal can be continuously added to the crushing cavity 610 through the feeding port 651, so that the crushing kettle 121 can The crushing of coal is carried out continuously.

This embodiment also provides a liquefaction process based on the above-mentioned coal liquefaction device, which includes the following steps:

Step 1, open the discharge port of the crushing kettle 121 on one of the pulverized coal storage tanks 120, so that the pulverized coal in the crushing kettle 121 enters the pulverized coal storage tank 120 connected with it through the feeding pipeline 122;

Step 2: When the pulverized coal in the pulverized coal storage tank 120 is accumulated to a certain amount, the power supply of the pumping mechanism is turned on to fill the inert gas in the gas storage tank 110 into the pulverized coal storage tank 120. When the pulverized coal storage tank 120 When the pressure in the gasifier 140 is the same as the pressure in the gasifier 140, the first valve 151 is opened, so that the pulverized coal in the pulverized coal storage tank 120 falls into the gasifier 140 and is liquefied in the gasifier 140;

Step 3: When the pulverized coal in the pulverized coal storage tank 120 is transported to the gasifier 140, the feeding port of the upper crushing kettle 121 in the pulverized coal storage tank 120, which was previously added with pulverized coal, is opened, so that the crushing kettle 121 is filled. When the pulverized coal in the pulverized coal storage tank 120 is completely discharged into the gasifier 140, the pulverized coal in the other pulverized coal storage tank 120 is added, and the pumping mechanism is turned on at this time. The relevant valve on the gas storage tank 110 makes the pressure in the gas storage tank 110 equal to the pressure in the two adjacent pulverized coal storage tanks 120;

Step 4: Adjust the closing of the valve on the pumping mechanism, and then reduce the pressure of the pulverized coal storage tank 120 for emptying the pulverized coal to atmospheric pressure through the action of the pumping mechanism, so that the pressure of the pulverized coal storage tank 120 filled with pulverized coal is completed. Equivalent to gasifier 140;

Step 5: Repeat the operations from Step 1 to Step 4 in sequence.

Claims (9)

1. coal liquefaction plant, it is characterized in that: comprise the gas storage tank (110) that is used for storing inert gas, and both ends of gas storage tank (110) are provided with pulverized coal storage tank (120), pulverized coal storage tank (110) 120) the upper end is connected with a crushing mechanism, the crushing mechanism comprises a crushing kettle (121), a feeding pipeline (122) is connected between the crushing kettle (121) and the pulverized coal storage tank (120), and a crushing kettle (121) is provided with a crushing a cavity (610), the crushing cavity (610) is provided with a plurality of supporting plates (620) spaced along the height direction of the crushing cavity (610), and a rotatable shaft (630) is provided at the center of the crushing cavity (610), The rotating shaft (630) is provided with a plurality of rotating plates (640) for cooperating with the supporting plate (620). A through hole (710); a first connecting pipe (130) for connecting the gas storage tank (110) and the pulverized coal storage tank (120) is provided between the pulverized coal storage tank (120) and the gas storage tank (110). A connecting pipe (130) is provided with a pumping mechanism for conveying the gas in the gas storage tank (110) and the pulverized coal storage tank (120); A U-shaped connecting pipe (160) connected to the first connecting pipe (130), a pressure relief device is provided on the first connecting pipe (130) between the filter device and the U-shaped connecting pipe (160), and the pressure relief device includes A tubular pressure relief pipe (190), an inner pipe (410) is arranged in the pressure relief pipe (190), the inner wall of the pressure relief pipe (190) and the outer wall of the inner pipe (410) form a pressure relief cavity (510), and the inner pipe ( 410) The outer side wall at the center is provided with a first annular mounting plate (520) fixedly connected to the inner side wall of the pressure relief pipe (190), and the first annular mounting plate (520) divides the pressure relief chamber (510) into two parts. a relatively independent space; the center of the inner tube (410) is provided with a second annular mounting plate (530), and the outer side wall of the inner tube (410) is provided with a plurality of uniform and Air guide holes (540) distributed at intervals along the axial direction of the inner tube (410), a sliding column (550) is slidably provided in the inner tube (410), and a sliding column (550) close to the second annular mounting plate (530) is provided with a sliding column (550). A blind hole (551) is arranged at the end, a spring (560) is arranged in the inner tube (410), one end of the spring (560) is abutted in the blind hole (551), and the other end of the spring (560) is abutted against the first two annular mounting plates (530); baffle plates (570) for blocking the sliding column (550) are provided at the openings at both ends of the inner pipe (410), and baffle plates (570) are provided at the center of the baffle plates (570) for communicating with each other. A hole (571); a gasifier (140) is arranged below the gas storage tank (110), and a pulverized coal storage tank (120) is provided between the pulverized coal storage tank (120) and the gasifier (140) for connecting the pulverized coal storage tank (120) with the The second connecting pipe ( 150), the second connecting pipe (150) is provided with a first valve (151). 2 . The coal liquefaction device according to claim 1 , wherein the first connecting pipe ( 130 ) is provided with a U-shaped connecting pipe ( 160 ) and the first connecting pipe ( 130 ) at the junction between the U-shaped connecting pipe ( 160 ) and the first connecting pipe ( 130 ). 3 . The third connecting pipe (210) connected with the U-shaped connecting pipe (160) is provided with a first air pump (220); the U-shaped connecting pipe (160) is located on the U-shaped connecting pipe (160) Both ends of the connection with the third connecting pipe (210) are respectively provided with a second valve (230) and a third valve (240), the second valve (230) is arranged near the pulverized coal storage tank (120), Three valves (240) are arranged near the gas storage tank (110); the first connecting pipe (130) is provided with fourth valves at both ends of the connection between the third connecting pipe (210) and the first connecting pipe (130) (250) and a fifth valve (260), the fourth valve (250) is arranged at the connection between the third connecting pipe (210) and the first connecting pipe (130) and the U-shaped connecting pipe (160) and the first connecting pipe (130) and close to the end of the pulverized coal storage tank (120); the fifth valve (260) is arranged at the connection between the third connecting pipe (210) and the first connecting pipe (130) and the U-shaped connecting pipe ( 160) and the connection between the first connecting pipe (130) and near the gas storage tank (110). 3. The coal liquefaction device according to claim 2, characterized in that: the first connecting pipe (130) is provided with a filter device located between the pumping mechanism and the pulverized coal storage tank (120), and the filter device comprises a filter screen The installation seat (170) is provided with a filter screen installation cavity (310) in the filter screen installation seat (170), and a plurality of groups of card slots (320) are arranged in the filter screen installation cavity (310), and the card slots (320) are clipped in There is a first filter screen (330), and a filter screen installation cavity cover plate (340) for sealing the filter screen installation cavity (310) is provided on the upper end of the filter screen installation seat (170). 4 . The coal liquefaction device according to claim 3 , wherein the bottom surface of the filter screen installation cavity ( 310 ) is recessed downward to form a screen screen installation step ( 350 ), and the filter screen installation step ( 350 ) is provided with a vertical filter screen installation step ( 350 ). A second filter screen (360) provided with a filter screen (330) and used to support the first filter screen (330), the bottom end of the second filter screen (360) is provided with a pulverized coal storage in the shape of a rounded cone as a whole cavity (370). 5. The coal liquefaction device according to claim 4, characterized in that: between the pulverized coal storage tank (120) and the filter screen mounting seat (170), there is provided for connecting the pulverized coal storage tank (120) and the filter screen mounting seat The fourth connecting pipe (180) of (170), the end of the fourth connecting pipe (180) is connected with the pulverized coal storage cavity (370), and the fourth connecting pipe (180) is provided with a sixth valve (181). 6. The coal liquefaction device according to claim 1, characterized in that: the side wall of the crushing cavity (610) is provided with a plurality of strip-shaped grooves (810) arranged along the height direction of the crushing cavity (610), and the crushing cavity The side wall of (610) is provided with a number of annular grooves (820) arranged along the height direction of the crushing cavity (610), and the support plate (620) is provided with the strip groove (810) and the annular groove (820) to match bump (720). 7. The coal liquefaction device according to claim 6, characterized in that: the side wall of the rotating shaft (630) is provided with a plurality of rotating plate clamping grooves (910) arranged along its height direction, and the upper center of the rotating plate (640) There is a rotating plate through hole (1010) that is clearance-fitted with the rotating shaft (630), and the inner wall of the rotating plate through hole (1010) is provided with a clamping block (1020) matched with the rotating plate clamping groove (910); The side wall of (121) is provided with a limit hole (830) passing through the annular groove (820), and the bump (720) is provided with a bump through hole (721) matched with the limit hole (830), The limiting hole (830) is provided with a limiting rod (840) passing through the through-hole (721) of the protruding block. 8. The coal liquefaction plant according to claim 1, characterized in that: the upper end of the crushing kettle (121) is provided with a crushing kettle cover plate (650) for sealing the crushing cavity (610), and the crushing kettle cover plate ( 650) is provided with a motor (660) for driving the rotating shaft (630); the crushing kettle cover plate (650) is provided with a plurality of uniform feeding ports (651). 9. The coal liquefaction plant according to any one of claims 1 to 8, wherein the production process comprises the following steps: Step 1. Open the discharge port of the crushing kettle (121) on one of the pulverized coal storage tanks (120), so that the pulverized coal in the crushing kettle (121) enters the pulverized coal storage tank connected to it through the feeding pipeline (122). (120); Step 2, when the pulverized coal in the pulverized coal storage tank (120) is accumulated to a certain amount, the power supply of the pumping mechanism is turned on to fill the inert gas in the gas storage tank (110) into the pulverized coal storage tank (120), When the pressure in the pulverized coal storage tank (120) is the same as the pressure in the gasifier (140), the first valve (151) is opened, so that the pulverized coal in the pulverized coal storage tank (120) falls into the gasifier (140). ) and liquefy in the gasifier (140); Step 3: When the pulverized coal in the pulverized coal storage tank (120) is transported to the gasifier (140), the feed of the upper crushing kettle (121) in the pulverized coal storage tank (120) previously added with pulverized coal is The opening is opened so that the pulverized coal in the crushing kettle (121) enters the pulverized coal storage tank (120), and when the pulverized coal in the pulverized coal storage tank (120) is completely discharged into the gasifier (140), another pulverized coal is discharged into the gasifier (140). The addition of pulverized coal in the storage tank (120) is completed, and at this time, the relevant valve on the pumping mechanism is opened to make the pressure in the gas storage tank (110) equal to the pressure in the two adjacent pulverized coal storage tanks (120); Step 4: Adjust the closing of the valve on the pumping mechanism, and then make the medium pressure of the pulverized coal storage tank (120) for emptying the pulverized coal to be reduced to atmospheric pressure by the action of the pumping mechanism, so that the pulverized coal storage tank (120) that is filled with the pulverized coal is completed. The pressure of 120) is equal to that of the gasifier (140); Step 5: Repeat the operations from Step 1 to Step 4 in sequence.

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