Syngas nozzle for slurry bed reactor

Abstract

A synthesis gas nozzle for a slurry bed reactor is composed of a diffusion pipe, an armature core base, an armature core and a micro-nano device, the diffusion pipe is composed of a linear hollow body and a trumpet-shaped pipe section, the armature core base is composed of a hollow base body and a cylinder body, synthesis gas spraying holes are formed in the cylinder body, a synthesis gas channel is formed in the center of the hollow base body, and the micro-nano device is arranged in the hollow base body. The armature core is composed of a lower plug, a connecting rod and an upper plug, the micro-nano device is composed of a linear section cylinder and a sealing cover, micro-nano holes are formed in the circumferential wall of the linear section cylinder, the diffusion pipe and the armature core base are installed together in a rotating mode, the micro-nano device is installed on the diffusion pipe in a rotating mode, and the lower plug is arranged in the cylinder of the armature core base. The device is novel and unique in structure, convenient to install and use and good in effect, uniform distribution and micro-nanocrystallization of gas in slurry are achieved, mass transfer efficiency is improved, retention time is prolonged, backflow of the slurry can be effectively prevented when gas supply of the reactor is stopped, and economic and social benefits are huge.

Description

Technical Field

[0001] The invention relates to a mechanical nozzle, in particular to a synthetic gas nozzle for a slurry bed reactor. Background Art

[0002] The three-phase slurry bed reactor is widely used in the coal chemical industry because of its excellent isothermal operating performance. It is the main equipment for synthesizing synthetic gas chemicals, such as coal-to-oil, coal-to-liquid wax, coal-to-olefins and coal-to-oxygenated organic matter. It is necessary equipment in the production. The importance of the slurry bed reactor can be seen. Therefore, the optimization of the slurry bed reactor, improving its reaction efficiency and safe and stable operation have always been technical problems that scientific researchers have been constantly working hard to solve.

[0003] As one of the core components of the slurry bed reactor, the gas distributor has the main function of ensuring uniform distribution of syngas, improving the mass transfer efficiency of syngas in the slurry, and preventing the slurry from backflowing and blocking the pipeline. The syngas nozzle is the core component of the gas distributor, and plays a key role in syngas distribution uniformity, mass transfer efficiency, injection direction, and anti-blocking. However, due to structural problems, the existing syngas nozzles mainly lead to: 1. The bubbles formed by the injected gas in the slurry are large, the bubbles stay in the slurry for a short time, and the mass transfer efficiency between gas and liquid is not high; 2. When the syngas supply is interrupted, the slurry backflows and the gas supply pipeline is blocked; 3. The bubbling of the injected gas is uneven, which will affect the use effect of the gas distributor.

[0004] In order to overcome the technical defects of the nozzle of the existing gas distributor, many patents have proposed countermeasures, involving changing the nozzle injection direction; adding a gas distributor to form a separate gas cavity at the bottom of the slurry bed reactor; changing the jet valve to prevent the slurry from flowing back. The distributor structure proposed in patent CN03151229.1 improves the uniformity of syngas distribution, but due to structural problems, there are no preventive measures for the slurry from blocking and backflowing; patent CN104209069 proposes a gas distribution plate, an air inlet pipe, a backflow baffle and a gas distribution valve. Although it involves the structure of the gas distribution valve, it has also made certain improvements to prevent the slurry from backflowing and blocking the pipeline, but the diameter of the bubbles formed by the syngas ejected by the gas distribution valve in the slurry is too large, and there are no obvious improvement measures in reducing the bubble diameter and increasing the specific surface area of ​​the bubbles. Therefore, how to achieve uniform distribution of gas in the slurry, effectively prevent the slurry from flowing back when the reactor stops supplying gas, realize the micro-nanoization of gas, improve the mass transfer efficiency of syngas in the slurry, and extend the residence time of syngas in the slurry are technical problems that need to be seriously solved. Summary of the invention

[0005] In view of the above situation, in order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a synthesis gas nozzle for a slurry bed reactor, which can effectively solve the problem of achieving uniform distribution of gas in the slurry, effectively preventing the slurry from flowing back when the reactor stops supplying gas, realizing micro-nanoization of the gas, improving the mass transfer efficiency of the synthesis gas in the slurry, and prolonging the residence time of the synthesis gas in the slurry.

[0006] The technical solution provided by the present invention is a synthesis gas nozzle for a slurry bed reactor, which is composed of a diffusion tube, a core base, a core and a micro-nano device. The diffusion tube is a hollow integrated structure composed of a first straight segment hollow body with a small outer diameter at the bottom, a second straight segment hollow body with a large outer diameter at the top and a trumpet-shaped tube segment in the middle connected concentrically; the core base is a hollow integrated structure composed of a hollow seat body at the bottom and a cylindrical body at the top connected concentrically, a plurality of evenly distributed synthesis gas injection holes are opened on the lower part of the circumferential wall of the cylindrical body, and a synthesis gas channel is provided in the center of the hollow seat body; the core is an integrated structure composed of a lower plug at the bottom, a connecting rod in the middle and an upper plug at the top connected concentrically, the lower plug is cylindrical, and its outer diameter is the same as the inner diameter of the cylindrical body. The diameters are equal, forming a sealing sliding structure in the cylinder, the upper plug is conical, so as to reduce the resistance of the slurry when the core moves upward, and the thickness of the lower plug is 1-2mm greater than the diameter of the synthesis gas injection hole to ensure that the lower plug can block the synthesis gas injection hole when it falls on the plane of the lower baffle plate; the micro-nano device is a hollow integrated structure formed by the concentric connection of the straight segment cylinder and the upper hemispherical sealing cover body, and there are micro-nano holes on the peripheral wall of the straight segment cylinder; the diffusion tube is screwed together with the core base through the first internal thread of the first straight segment hollow body and the first external thread on the hollow seat body, and the micro-nano device is screwed on the diffusion tube through the second internal thread on the inner wall of the lower part of the straight segment cylinder and the second external thread of the second straight segment hollow body, forming The concentric disassembly and assembly structure; the lower plug of the core is placed in the cylindrical body of the core base, the upper end of the connecting rod extends out of the upper part of the cylinder, the upper plug is placed at the center of the diffusion tube cavity at the upper part of the cylinder, the distance from the lower plane of the upper plug to the upper plane of the lower plug is equal to the distance between the upper baffle and the lower baffle, forming an up and down moving structure of the core, which is used to open and close the synthesis gas injection hole. When in use, the third external thread on the outer wall of the hollow body of the second straight section of the diffusion tube is connected with the internal thread of the gas distribution plate of the slurry bed reactor to fix the synthesis gas nozzle on the distribution plate; the synthesis gas enters the nozzle from the synthesis gas channel. At this time, the pressurized synthesis gas pushes the lower plug of the core to the lower plane of the upper baffle at the upper part of the core base, and the synthesis gas injection hole changes from a closed state to an open state, and the synthesis gas passes through The synthesis gas injection hole sprays into the diffusion tube. When the synthesis gas enters the diffusion tube section from the synthesis gas injection hole, the synthesis gas diffuses to the surroundings while flowing upward, which makes the synthesizer pressure of the diffusion tube cross section the same, and enters the slurry evenly through the micro-nano holes on the surface of the micro-nano device. The bubbling distribution generated in the cross section of the slurry bed reactor is more uniform. When the reactor stops supplying gas, the core slides downward under the action of its own gravity. Due to the existence of the lower baffle and the upper baffle, the lower plug of the core can only move between the upper and lower baffles, and the upper plug moves up and down outside the base of the core. When the lower plug fits with the end face of the lower baffle, the synthesis gas injection hole is blocked by the lower plug. At this time, the upper plug fits tightly with the upper end plane of the upper baffle, which effectively prevents the slurry from flowing back and blocking the air inlet pipe.

[0007] The invention has a novel and unique structure, is easy to install and use, has good effects, can evenly distribute the gas in the slurry, effectively prevent the slurry from flowing back when the reactor stops supplying gas, realizes the micro-nanoization of the gas, can effectively improve the mass transfer efficiency of the synthesis gas in the slurry, and prolongs the residence time of the synthesis gas in the slurry, with huge economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 is a three-dimensional diagram of the diffuser tube 1 of the present invention; Figure 4 is a cross-sectional view of a diffuser tube 1 of the present invention; Figure 5 A three-dimensional diagram of the core base 2 of the present invention; Figure 6 A three-dimensional diagram of the core 4 of the present invention; Figure 7 It is a cross-sectional view of the core base 2 and the core 4 of the present invention when they are assembled together; Figure 8 It is a three-dimensional diagram of the micro-nano device 3 of the present invention. DETAILED DESCRIPTION

[0009] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings and specific circumstances.

[0010] The present invention discloses a syngas nozzle for a slurry bed reactor, which is composed of a diffuser 1, a core base 2, a core 4 and a micro-nano device 3. The diffuser 1 is a hollow integral structure composed of a first straight segment hollow body 1-1 with a small outer diameter at the bottom, a second straight segment hollow body 1-6 with a large outer diameter at the top and a trumpet-shaped pipe section 1-2 in the middle connected concentrically; the core base 2 is a hollow integral structure composed of a hollow seat body 2-1 at the bottom and a cylindrical body 2-3 at the top connected concentrically, a plurality of uniformly distributed syngas injection holes 2-4 are opened on the lower part of the peripheral wall of the cylindrical body 2-3, and a hollow seat body 2-1 is provided at the center thereof. Synthesis gas channel 2-5; the core 4 is an integrated structure consisting of a lower plug 4-1 at the bottom, a connecting rod 4-2 in the middle and an upper plug 4-3 connected concentrically, the lower plug 4-1 is cylindrical, the outer diameter is equal to the inner diameter of the cylinder 2-3, and constitutes a sealing sliding structure in the cylinder 2-3, the upper plug 4-3 is conical, so as to reduce the resistance of the slurry when the core moves upward, the thickness of the lower plug 4-1 is greater than the diameter of the synthesis gas injection hole 2-4 by 1-2mm, so as to ensure that the lower plug 4-1 can block the synthesis gas injection hole 2-4 when it falls on the upper plane of the lower baffle 2-6; the micro The nano device 3 is a hollow integrated structure formed by the concentric connection of a straight segment cylinder 3-2 and a hemispherical sealing cover 3-1 on the upper part, and there are micro-nano holes 3-3 on the peripheral wall of the straight segment cylinder 3-2; the diffusion tube 1 is screwed together with the core base 2 through the first internal thread 1-7 of the first straight segment hollow body 1-1 and the first external thread 2-2 on the hollow seat body 2-1, and the micro-nano device 3 is screwed on the diffusion tube 1 through the second internal thread 3-4 on the lower inner wall of the straight segment cylinder 3-2 and the second external thread 1-5 of the second straight segment hollow body 1-6, forming a concentric disassembly structure; the lower plug 4- 1 is placed in the cylinder 2-3 of the core base 2, the upper end of the connecting rod 4-2 extends out of the upper part of the cylinder 2-3, the upper plug 4-3 is placed at the center of the cavity of the diffuser 1 at the upper part of the cylinder 2-3, the distance between the lower plane of the upper plug 4-3 and the upper plane of the lower plug 4-1 is equal to the distance between the upper baffle 2-7 and the lower baffle 2-6, forming an up and down moving structure of the core 4, which is used to open and close the gas injection hole 2-4. When in use, the third external thread 1-3 on the outer wall of the second straight section hollow body 1-6 of the diffuser 1 is connected with the internal thread of the gas distribution plate of the slurry bed reactor to fix the synthesis gas nozzle on the distribution plate;The synthesis gas enters the nozzle from the synthesis gas channel 2-5. At this time, the pressurized synthesis gas pushes the lower plug 4-1 of the core 4 to the lower plane of the upper baffle 2-7 on the upper part of the core base 2, and the synthesis gas injection hole 2-4 changes from a closed state to an open state. The synthesis gas is sprayed into the diffusion pipe 1 through the synthesis gas injection hole 2-4. When the synthesis gas enters the diffusion pipe section from the synthesis gas injection hole 2-4, the synthesis gas diffuses to the surroundings while flowing upward, which makes the synthesis pressure of the cross section of the diffusion pipe the same, and evenly enters the slurry through the micro-nano holes 3-3 on the surface of the micro-nano device 3. In the liquid, the bubbles generated in the cross section of the slurry bed reactor are more evenly distributed. When the reactor stops supplying gas, the core slides down under the action of gravity. Due to the existence of the lower baffle 2-6 and the upper baffle 2-7, the lower plug of the core can only move between the upper and lower baffles, and the upper plug moves up and down outside the base of the core. When the lower plug 4-1 fits with the end surface of the lower baffle 4-3, the synthesis gas injection hole 2-4 is blocked by the lower plug 4-1. At this time, the upper plug 4-3 just fits tightly with the upper end plane of the upper baffle 2-7, effectively preventing the slurry from flowing back and blocking the air inlet pipe. ;

[0011] To ensure the effectiveness and ease of use, an equihexagonal convex edge 1-4 is provided in the middle of the outer wall of the second straight segment hollow body 1-6, a second external thread 1-5 on the upper part of the convex edge 1-4 is used to screw the micro-nano device 3, and a third external thread 1-3 on the lower part of the convex edge 1-4 is used to connect with the internal thread of the gas distribution plate of the slurry bed reactor to fix the synthesis gas nozzle on the distribution plate.

[0012] A through hole 2-8 is provided at the center of the upper baffle plate 2-7 for passing the connecting rod 4-2.

[0013] The centers of the diffusion tube 1, the core base 2, the core 4 and the micro-nano device 3 are on the same straight line.

[0014] The inner and outer diameters of the straight segment cylinder 3-2 are respectively the same as the inner and outer diameters of the lower opening of the sealing cover 3-1.

[0015] The outer diameter of the cylindrical body 2-3 is smaller than the outer diameter of the hollow seat body 2-1, and the diameter of the synthesis gas channel 2-5 of the hollow seat body 2-1 is smaller than the inner diameter of the cylindrical body 2-3.

[0016] The synthesis gas injection holes 2-4 are cut in a tangent or oblique manner.

[0017] The above examples are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention, such as: The micro-nano device 3 can also be a hollow cover structure made of a 300-500 mesh filter.

[0018] The above-mentioned components can be made of stainless steel, high alloy steel, ceramic or engineering plastics according to the needs during production (known technology).

[0019] When the present invention is used, the diffusion tube is screwed together with the internal thread of the gas distribution plate of the slurry bed reactor through the third external thread 1-3, and the internal thread of the gas distribution plate of the slurry bed reactor is screwed together every 200-250cm. 2 Only one nozzle of the present invention is required, which is very simple and convenient. When the synthesis gas enters from the synthesis gas channel 2-5, the mouthpiece is pushed upward by the synthesis gas, opens the synthesis gas injection hole 2-4, enters the diffusion tube, and diffuses to the surroundings while flowing upward, and evenly enters the slurry through the micro-nano holes 3-3, so that the slurry bubbling distribution in the slurry bed reactor is more uniform. When the reactor stops supplying gas, the mouthpiece slides downward under the action of its own weight. When the lower plane of the lower plug 4-1 fits with the lower baffle 2-6, the synthesis gas injection hole 2-4 is blocked by the lower plug 4-1, and at the same time, the upper plug The lower plane of the head 2-3 is in contact with the upper plane of the upper baffle, which effectively prevents the slurry from backflowing and blocking the air inlet hole, thereby achieving uniform distribution of gas in the slurry. When the reactor stops supplying gas, it can effectively prevent the slurry from backflowing, while realizing the micro-nanoization of the gas, improving the mass transfer efficiency of the synthesis gas in the slurry, extending the residence time of the synthesis gas in the slurry, ensuring the quality of the slurry, and reducing the amount of synthesis gas required for a ton of product under the condition of the original reaction pressure and temperature unchanged, saving resources. After testing and practice, compared with the existing technology, it has the following significant beneficial technical effects: 1. The bubbling is more uniform. Compared with other syngas, the gas ejected from this nozzle has a smaller diameter. The proportion of bubbles with a diameter less than 50μm is more than 90%. According to the relationship between the volume and surface area of ​​the bubble, it can be deduced that when the total volume remains unchanged, the total surface area of ​​the bubble is inversely proportional to the diameter of a single bubble. Since the diameter of micro-nano bubbles is smaller, their comparative area is larger. Compared with 1mm bubbles, the specific surface area of ​​10-micron bubbles is theoretically 100 times that of 1mm bubbles at a certain volume. The micron bubbles are in more complete contact with the slurry and catalyst and are more evenly distributed.

[0020] 2. To prevent the slurry from flowing back, the present invention has a double-layer anti-blocking structure. The first layer is a micro-nano device. The micro-nano holes on the surface of the micro-nano device can slow down or even prevent the slurry from flowing back. The second layer is a gas injection device. When the synthetic gas is notified to supply gas, the core falls by its own gravity to block the synthetic gas injection hole, further preventing the slurry from flowing back and blocking the air intake pipe.

[0021] 3. Prolong the residence time of bubbles in the slurry. Micro-nano bubbles have different properties from ordinary bubbles. According to Stokes' law, the rising speed of bubbles in water is proportional to the square of the bubble diameter. The smaller the bubble diameter, the smaller the buoyancy, and the slower the rising speed of the bubble. From the relationship between the rising speed of bubbles and the bubble diameter, it can be seen that the rising speed of bubbles with a diameter of 1mm in water is 6m / min, while the rising speed of bubbles with a diameter of 10μm in water is 3mm / min. The latter stays in the liquid for 1 / 2000 of the former. Micro-nano bubbles stay in the slurry for a longer time, ensuring the uniform distribution of gas in the slurry.

[0022] 4. Improve the mass transfer efficiency. Since the diameter of the generated bubbles is at the micro-nano level, the bubbles are affected by the surrounding gas-liquid interfacial tension, and the internal pressure of the bubbles far exceeds the external slurry pressure, thereby compressing the gas inside the bubbles to form a self-pressurization effect, so that more gas inside the bubbles is dissolved in the slurry. According to the Young-Laplace equation, P=2σ / r, P represents the value of the pressure rise, σ represents the surface tension, and r represents the bubble radius. The pressure on bubbles with a diameter of more than 0.1mm is very small and can be ignored, while tiny bubbles with a diameter of 10μm will be subject to a pressure of 0.3 atmospheres, and bubbles with a diameter of 1μm will be subject to a pressure of up to 3 atmospheres. As the bubble diameter decreases, the pressure on the bubble will gradually increase. The increase in pressure will increase the dissolution rate of the gas, thereby promoting the gas inside the bubble to pass through the gas-liquid interface into the slurry, which can effectively improve the mass transfer efficiency and slurry quality of the gas-liquid interface.

Claims

1. A synthesis gas nozzle for a slurry bed reactor, characterized in that: The device is composed of a diffusion tube (1), a core holder base (2), a core holder (4) and a micro-nano device (3); the diffusion tube (1) is a hollow integrated structure formed by a first straight segment hollow body (1-1) with a small outer diameter at the bottom, a second straight segment hollow body (1-6) with a large outer diameter at the top and a trumpet-shaped tube segment (1-2) in the middle being coaxially connected; the core holder base (2) is a hollow integrated structure formed by a hollow seat body (2-1) at the bottom and a cylindrical body (2-3) at the top being coaxially connected; a plurality of evenly distributed synthesis gas injection holes (2-4) are opened on the lower part of the peripheral wall of the cylindrical body (2-3); and a synthesis gas channel (2-5) is provided at the center of the hollow seat body (2-1); The core (4) is an integrated structure consisting of a lower plug (4-1) at the bottom, a connecting rod (4-2) in the middle, and an upper plug (4-3) at the top, which are connected concentrically. The lower plug (4-1) is cylindrical, and its outer diameter is equal to the inner diameter of the cylinder (2-3), forming a sealing sliding structure in the cylinder (2-3). The upper plug (4-3) is conical, so as to reduce the resistance of the slurry when the core moves upward. The thickness of the lower plug (4-1) is greater than the diameter of the synthesis gas injection hole (2-4) by 1-2 mm, so as to ensure that the lower plug (4-1) can block the synthesis gas injection hole (2-4) when it falls on the upper plane of the lower baffle (2-6). The micro-nano The device (3) is a hollow integrated structure formed by a straight segment cylindrical body (3-2) and an upper hemispherical sealing cover body (3-1) connected concentrically, and micro-nano holes (3-3) are provided on the peripheral wall of the straight segment cylindrical body (3-2); the diffusion tube (1) is screwed together with the core base (2) via a first internal thread (1-7) of the first straight segment hollow body (1-1) and a first external thread (2-2) on the hollow seat body (2-1), and the micro-nano device (3) is screwed onto the diffusion tube (1) via a second internal thread (3-4) on the lower inner wall of the straight segment cylindrical body (3-2) and a second external thread (1-5) of the second straight segment hollow body (1-6), forming a concentric disassembly system. The center of the diffusion tube (1), the core base (2), the core (4) and the micro-nano device (3) are on the same straight line; the lower plug (4-1) of the core (4) is placed in the cylindrical body (2-3) of the core base (2), the upper end of the connecting rod (4-2) extends out of the upper part of the cylindrical body (2-3), the upper plug (4-3) is placed at the center of the cavity of the diffusion tube (1) at the upper part of the cylindrical body (2-3), the distance between the lower plane of the upper plug (4-3) and the upper plane of the lower plug (4-1) is equal to the distance between the upper baffle (2-7) and the lower baffle (2-6), forming an up-and-down moving structure of the core (4) for opening and closing the synthesis gas injection hole (2-4); when in use, the third external thread (1-3) on the outer wall of the second straight section hollow body (1-6) of the diffusion tube (1) is connected to the internal thread of the gas distribution plate of the slurry bed reactor, and the synthesis gas nozzle is fixed on the distribution plate;The synthesis gas enters the nozzle from the synthesis gas passage (2-5). At this time, the pressurized synthesis gas pushes the lower plug (4-1) of the core (4) to the lower plane of the upper baffle (2-7) on the upper part of the core base (2). The synthesis gas injection hole (2-4) changes from a closed state to an open state. The synthesis gas is injected into the diffusion pipe (1) through the synthesis gas injection hole (2-4). When the synthesis gas enters the diffusion pipe section from the synthesis gas injection hole (2-4), the synthesis gas diffuses to all sides while flowing upward, so that the synthesis pressure of the cross section of the diffusion pipe is the same, and the synthesis gas passes through the micro-nano holes (3-3) on the surface of the micro-nano device (3) uniformly. When the slurry enters the slurry, the bubbles generated in the cross section of the slurry bed reactor are more evenly distributed. When the reactor stops supplying gas, the core slides downward under the action of gravity. Due to the presence of the lower baffle (2-6) and the upper baffle (2-7), the lower plug of the core can only move between the upper and lower baffles, and the upper plug moves up and down outside the base of the core. When the lower plug (4-1) fits with the end surface of the lower baffle (4-3), the synthesis gas injection hole (2-4) is blocked by the lower plug (4-1). At this time, the upper plug (4-3) fits tightly with the upper end plane of the upper baffle (2-7), effectively preventing the slurry from flowing back and blocking the air inlet pipe. ; 2. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: An equihexagonal convex edge (1-4) is provided in the middle of the outer wall of the second straight-segment hollow body (1-6); a second external thread (1-5) on the upper part of the convex edge (1-4) is used for screwing the micro-nano device (3); and a third external thread (1-3) on the lower part of the convex edge (1-4) is used for connecting with the internal thread of the gas distribution plate of the slurry bed reactor to fix the synthesis gas nozzle on the distribution plate.

3. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: A through hole (2-8) is provided at the center of the upper baffle plate (2-7) for passing the connecting rod (4-2).

4. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: The inner and outer diameters of the straight segment cylindrical body (3-2) are respectively the same as the inner and outer diameters of the lower opening of the sealing cover body (3-1).

5. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: The outer diameter of the cylindrical body (2-3) is smaller than the outer diameter of the hollow seat body (2-1), and the diameter of the synthesis gas channel (2-5) of the hollow seat body (2-1) is smaller than the inner diameter of the cylindrical body (2-3).

6. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: The synthesis gas injection holes (2-4) are cut in a tangent or oblique manner.

7. The synthesis gas nozzle for a slurry bed reactor according to claim 1, characterized in that: The micro-nano device (3) may also be a hollow cover structure made of a 300-500 mesh filter.

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