Coal ash reaction device for solid waste carbon sequestration

Abstract

This utility model discloses a coal ash reaction device for solid waste carbon fixation, relating to the field of coal ash carbon fixation technology. It includes a reaction tank with a discharge pipe equipped with a valve at the bottom and multiple support legs at the bottom. A tank cover is fixedly installed on the top of the tank, with a feed pipe on the top of the cover. A gearbox is fixedly installed on the top of the cover, and a reduction motor is fixedly installed on the top of the gearbox. The output end of the reduction motor extends through the gearbox and is fixedly connected to a main shaft. The bottom end of the main shaft movably passes through the cover and extends into the interior of the reaction tank. Multiple first stirring rods are fixedly connected to both sides of the main shaft, and a first gear is fixedly connected to the outside of the main shaft. A reverse stirring mechanism is also included, comprising a first rotating connecting member and a transmission shaft. This utility model can effectively improve mass transfer efficiency and accelerate the reaction rate during reaction operations, while reducing resource waste, and has high overall practicality.

Description

Technical Field

[0001] This utility model relates to the technical field of coal ash carbon fixation technology, and in particular to a coal ash reaction device for solid waste carbon fixation. Background Technology

[0002] Carbon sequestration, also known as coal ash sequestration, refers to measures to increase the carbon content of the carbon pool outside the atmosphere. It can seal excess carbon and prevent it from being emitted into the atmosphere. Carbon sequestration is mainly divided into two types: physical carbon sequestration and biological carbon sequestration. Physical carbon sequestration involves storing carbon dioxide in extracted oil and gas wells, coal seams, and deep seas for a long period of time. Biological carbon sequestration involves converting carbon dioxide in the atmosphere into organic carbon and fixing it in plants or soil, mainly through photosynthesis and chemoenzyme.

[0003] During the production and processing of coal, some coal ash slurry is produced. Coal ash slurry is a product prepared by mixing fly ash and water in a certain proportion. Coal ash slurry can react with carbon dioxide to achieve the purpose of carbon sequestration. This requires the use of a carbon sequestration reaction device, as shown below.

[0004] A search revealed that patent CN222196474U discloses a coal ash solid waste carbon fixation device, comprising a carbon fixation tank. A rotating cylinder is fixedly connected to the inner top wall of the carbon fixation tank, and a power assembly is fixedly connected to the outer side of the rotating cylinder. A connecting frame is fixedly connected to the top of the carbon fixation tank, and a pushing cylinder is fixedly connected to the top of the connecting frame. A pushing plate is fixedly connected to the bottom end of the output shaft of the pushing cylinder, and a limit assembly is fixedly connected to the outer side of the pushing plate. A rotating rod is rotatably connected to the bottom end of the pushing plate, located inside the rotating cylinder. A connecting assembly is fixedly connected to the outer side of the rotating rod, and a stirring plate is fixedly connected to the outer side of the connecting assembly. This coal ash solid waste carbon fixation device has the advantage of improving the overall carbon fixation effect of coal ash.

[0005] However, the aforementioned device still has the following areas for optimization. For example, during operation, it generates a stirring and mixing effect through unidirectional rotation. The flow field produced by unidirectional rotation is relatively simple, resulting in limited mixing efficiency. Furthermore, the shear force generated by unidirectional rotation is weak, making it difficult to refine carbon dioxide bubbles. Consequently, it is insufficient to ensure sufficient contact between carbon dioxide and coal ash slurry. Insufficient contact between carbon dioxide and coal ash slurry is a key issue in coal ash solid waste carbon fixation technology, with comprehensive negative impacts. It not only directly affects carbon fixation efficiency but also leads to a series of serious consequences such as resource waste, reduced economic benefits, diminished environmental benefits, and product quality issues. For instance, insufficient contact can restrict gas-liquid mass transfer, preventing CO2 molecules from fully diffusing to the active sites on the surface of coal ash particles, thereby reducing carbon fixation efficiency. Alternatively, valuable components in coal ash may not be fully converted and utilized, resulting in resource waste. Therefore, a coal ash reaction device for solid waste carbon fixation is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model discloses a coal ash reaction device for solid waste carbon fixation. It features a reverse stirring mechanism, allowing coal ash slurry to be fed into the reaction tank via a feed pipe and carbon dioxide waste gas to be introduced through an air intake mechanism. Simultaneously, a reduction motor is activated, driving the main shaft to rotate. This rotation of the main shaft drives two sets of first stirring rods to rotate forward, mixing the coal ash slurry and carbon dioxide waste gas in the reaction tank. Simultaneously, the main shaft's rotation drives two sets of second stirring rods to rotate in the opposite direction. The forward and reverse rotation of the first and second stirring rods creates complex multi-vortex and shear layers. The high shear force generated by the forward and reverse stirring refines carbon dioxide bubbles to the micrometer scale, promoting microscale mixing and improving mass transfer efficiency. This improved mass transfer efficiency directly accelerates the reaction rate, thereby increasing carbon fixation efficiency. Furthermore, the coal ash slurry and carbon dioxide waste gas have sufficient contact, allowing valuable components in the coal ash to be fully converted and utilized, reducing resource waste. In summary, this invention solves the problems in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model discloses a coal ash reaction device for solid waste carbonization, comprising a reaction tank, a discharge pipe with a valve at the bottom of the reaction tank, multiple support legs at the bottom of the reaction tank, a tank cover fixedly installed at the top of the reaction tank, a feed pipe at the top of the tank cover, a gearbox fixedly installed at the top of the tank cover, a reduction motor fixedly installed at the top of the gearbox, the output end of the reduction motor extending through into the interior of the gearbox, a main shaft fixedly connected to the output end of the reduction motor, the bottom end of the main shaft movably penetrating through the tank cover and extending into the interior of the reaction tank, multiple first stirring rods fixedly connected to both sides of the main shaft, and a first gear fixedly connected to the outside of the main shaft;

[0009] A reverse stirring mechanism includes a first rotating connector and a drive shaft. The top of the first rotating connector is fixedly connected to the bottom of the tank lid. An annular rotating seat is rotatably connected to the bottom of the first rotating connector. The inner ring surface of the rotating seat is provided with a transmission gear. Two secondary shafts are fixedly connected to the bottom of the rotating seat. The two secondary shafts are symmetrically distributed. Multiple second stirring rods are fixedly connected to the opposite side of the two secondary shafts. The second stirring rods and the first stirring rods are arranged in an alternating vertical distribution. The drive shaft is rotatably mounted through the tank lid. A second gear is fixedly connected to the top of the drive shaft. The second gear meshes with the first gear. A third gear is fixedly connected to the bottom of the drive shaft. The third gear meshes with the transmission gear.

[0010] An air intake mechanism is located both outside and inside the reaction vessel.

[0011] Furthermore, a connecting seat is fixedly connected inside the reaction vessel, and the bottom end of the main shaft movably passes through the connecting seat and is rotatably connected to the connecting seat.

[0012] Furthermore, both the first gear and the second gear are located inside the gearbox, and the top of the drive shaft is rotatably connected to the top surface inside the gearbox via a second rotating connector.

[0013] Furthermore, the bottom end of the secondary shaft is close to but does not contact the connecting seat, and the distance between the bottom end of the secondary shaft and the connecting seat is 1cm-3cm.

[0014] Furthermore, multiple connecting lugs are provided on both sides of the can lid and the outside of the reaction vessel. Two adjacent connecting lugs are locked together by bolts, and two handles are fixedly connected to the top of the can lid.

[0015] Furthermore, the air intake mechanism includes an annular pipe, which is fixedly installed on the outside of the reaction vessel. An air intake pipe is connected to the top of the annular pipe, and multiple branch pipes are connected in an annular array at the bottom of the annular pipe. The bottom end of each branch pipe extends movably through the outer wall of the reaction vessel into the interior of the reaction vessel, and the branch pipe is close to the bottom of the reaction vessel.

[0016] Furthermore, the branch pipe has an opening angled toward the bottom of the reaction vessel, and a check valve is provided near its bottom end on the branch pipe, the check valve being located outside the reaction vessel.

[0017] The present invention has the following advantages over the prior art:

[0018] 1. This technical solution incorporates a reverse stirring mechanism. During operation, coal ash slurry is fed into the reaction tank through a feed pipe, and carbon dioxide waste gas is introduced into the reaction tank through an air intake mechanism. Simultaneously, a reduction motor is activated, driving the main shaft to rotate. The rotation of the main shaft drives two sets of first stirring rods to rotate forward, mixing the coal ash slurry and carbon dioxide waste gas in the reaction tank. Simultaneously, the rotation of the main shaft drives two sets of second stirring rods to rotate in the opposite direction. The forward-rotating first stirring rods and the reverse-rotating second stirring rods create complex multi-vortexes and shear layers. The high shear force generated by the forward and reverse stirring can refine carbon dioxide bubbles to the micron level, promoting microscale mixing and improving mass transfer efficiency. This improved mass transfer efficiency directly accelerates the reaction rate, thereby increasing carbon fixation efficiency. Furthermore, the coal ash slurry and carbon dioxide waste gas have sufficient contact, allowing valuable components in the coal ash to be fully converted and utilized, reducing resource waste. Overall, this solution has high practicality.

[0019] 2. This technical solution incorporates an air intake mechanism, allowing carbon dioxide exhaust gas to be introduced into the mechanism through the air intake pipe during operation. The air intake mechanism then evenly delivers the carbon dioxide exhaust gas into the reaction tank, thereby effectively increasing the gas-liquid contact area, improving gas utilization, and further enhancing the uniformity and efficiency of gas-liquid mixing. This makes it highly practical. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0023] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the reaction vessel of this utility model;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the rotating seat of this utility model.

[0025] Figure 5 This is a schematic diagram of the branch pipe installation structure of this utility model.

[0026] In the diagram: 1. Reaction vessel; 2. Discharge pipe; 3. Vessel cover; 4. Feed pipe; 5. Gearbox; 6. Gearbox; 7. Main shaft; 8. First stirring rod; 9. Reverse stirring mechanism; 901. First rotating connector; 902. Drive shaft; 903. Rotary seat; 904. Drive gear; 905. Sub-shaft; 906. Second stirring rod; 907. Second gear; 908. Third gear; 909. Second rotating connector; 10. First gear; 11. Air intake mechanism; 1101. Annular pipe; 1102. Air intake pipe; 1103. Branch pipe; 1104. Check valve; 12. Connecting seat; 13. Connecting lug; 14. Bolt; 15. Handle. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "surface", "side", "gap", "peripheral", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Specific Implementation Example 1:

[0030] Reference Figures 1-4 A coal ash reaction device for solid waste carbonization includes a reaction tank 1, a discharge pipe 2 with a valve at the bottom of the reaction tank 1, multiple support legs at the bottom of the reaction tank 1, a tank cover 3 fixedly installed at the top of the reaction tank 1, a feed pipe 4 at the top of the tank cover 3, a gearbox 5 fixedly installed at the top of the tank cover 3, a reduction motor 6 fixedly installed at the top of the gearbox 5, the output end of the reduction motor 6 extending through into the interior of the gearbox 5, a main shaft 7 fixedly connected to the output end of the reduction motor 6, the bottom end of the main shaft 7 movably passing through the tank cover 3 and extending into the interior of the reaction tank 1, multiple first stirring rods 8 fixedly connected to both sides of the main shaft 7, and a first gear 10 fixedly connected to the outside of the main shaft 7.

[0031] The reverse stirring mechanism 9 includes a first rotating connector 901 and a drive shaft 902. The top of the first rotating connector 901 is fixedly connected to the bottom of the tank cover 3. The bottom of the first rotating connector 901 is rotatably connected to an annular rotating seat 903. The inner ring surface of the rotating seat 903 is provided with a transmission tooth 904. The bottom of the rotating seat 903 is fixedly connected to two secondary shafts 905, which are symmetrically distributed. On the opposite side of the two secondary shafts 905, multiple second stirring rods 906 are fixedly connected. The second stirring rods 906 and the first stirring rods 8 are arranged in an alternating vertical distribution. The drive shaft 902 is rotatably mounted through the tank cover 3. The top of the drive shaft 902 is fixedly connected to a second gear 907, which meshes with a first gear 10. The bottom of the drive shaft 902 is fixedly connected to a third gear 908, which meshes with the transmission tooth 904. An air intake mechanism 11 is located both outside and inside the reaction tank 1.

[0032] The reaction vessel 1 is fixedly connected to a connecting seat 12. The bottom end of the main shaft 7 passes through the connecting seat 12 and is rotatably connected to the connecting seat 12. The first gear 10 and the second gear 907 are both located inside the gearbox 5. The top of the transmission shaft 902 is rotatably connected to the top surface of the gearbox 5 through the second rotating connector 909. The bottom end of the secondary shaft 905 is close to the connecting seat 12 but does not contact it, and the distance between the bottom end of the secondary shaft 905 and the connecting seat 12 is 1cm-3cm. Multiple connecting ears 13 are provided on both sides of the lid 3 and the outside of the reaction vessel 1. Two adjacent connecting ears 13 are locked together by bolts 14. Two handles 15 are fixedly connected to the top of the lid 3.

[0033] In the specific implementation process, during operation, the coal ash slurry can be transported to the reaction tank 1 through the feed pipe 4, and carbon dioxide waste gas can be introduced into the reaction tank 1 through the air intake mechanism 11. At the same time, the reduction motor 6 is started, and the reduction motor 6 drives the main shaft 7 to rotate. The rotation of the main shaft 7 drives the two sets of first stirring rods 8 to rotate in the forward direction, mixing and stirring the coal ash slurry and carbon dioxide waste gas in the reaction tank 1. When the main shaft 7 rotates, it will cooperate with the first gear 10 and the second gear 907 to drive the transmission shaft 902 to rotate. When the transmission shaft 902 rotates, it can cooperate with the transmission gear 904 to drive the rotating seat 903 to rotate in the reverse direction. The two secondary shafts 905 rotate in opposite directions around the main shaft 7, which in turn drives the two sets of second stirring rods 906 to rotate in opposite directions. Through the forward-rotating first stirring rod 8 and the reverse-rotating second stirring rods 906, complex multiple eddies and shear layers can be formed. The high shear force generated by the forward and reverse stirring can refine carbon dioxide bubbles to the micron level, promote microscale mixing, and improve mass transfer efficiency. The improved mass transfer efficiency directly accelerates the reaction rate, thereby improving carbon fixation efficiency. At the same time, the coal ash slurry and carbon dioxide waste gas have sufficient contact, so that the valuable components in the coal ash can be fully converted and utilized, reducing resource waste.

[0034] Among them, the connecting seat 12 can improve the overall stability of the spindle 7, making it less prone to shaking and deviation;

[0035] The first gear 10 and the second gear 907 are both located inside the gearbox 5 to protect the first gear 10 and the second gear 907 and prevent them from having their service life reduced due to external factors, such as dust and impurities adhering to them. The top of the drive shaft 902 is rotatably connected to the top surface inside the gearbox 5 through the second rotating connector 909 to improve the overall stability of the drive shaft 902 and make it less prone to shaking and deviation.

[0036] The bottom end of the secondary shaft 905 is close to the connecting seat 12 but not in contact with it in order to avoid motion obstruction between the secondary shaft 905 and the connecting seat 12;

[0037] The detachable connection of the tank cover 3 is to facilitate the maintenance and repair of the various structural components previously located inside the reaction vessel 1 after the tank cover 3 is removed, and the handle 15 is to facilitate the disassembly and assembly of the tank cover 3 by the staff.

[0038] Among them, the bottom of the can lid 3 is fitted with a sealing gasket, and the main shaft 7 passes through the can lid 3 and is sealed.

[0039] Among them, the tooth pitch of the inner ring transmission tooth 904 of the rotating seat 903 is the same as the tooth pitch of the third gear 908;

[0040] The first rotating connector 901 is a thrust ball bearing (model 51108), whose outer ring is welded to the bottom of the can cover 3 and whose inner ring is bolted to the top of the rotating seat 903, and is used to bear the axial force of the rotating seat 903; the second rotating connector 909 is a deep groove ball bearing (model 6205), whose outer ring is interference-fitted to the inner top surface of the gearbox 5 and whose inner ring is interference-fitted to the top of the drive shaft 902, and is used to bear the radial force of the drive shaft 902, and ensure the stable rotation of the drive shaft 902;

[0041] The fitting clearance between the connecting seat 12 and the main shaft 7 is 0.05-0.1mm. The connecting seat 12 has an annular lubrication groove (groove width 5mm, groove depth 3mm) inside, which is filled with lithium-based grease (model GB / T7324-2010). A Y-type sealing ring (model TC40×60×12) is provided at the penetration point between the connecting seat 12 and the main shaft 7. The lip of the sealing ring faces the inside of the reaction vessel 1 to prevent slurry from seeping into the connecting seat 12 and to ensure the long-term stable rotation of the main shaft 7. Specific Implementation Example 2:

[0043] Reference Figure 2 and Figure 5 In a preferred embodiment, the air intake mechanism 11 includes an annular pipe 1101, which is fixedly installed on the outside of the reaction vessel 1. The top of the annular pipe 1101 is connected to an air intake pipe 1102, and the bottom of the annular pipe 1101 is connected to multiple branch pipes 1103 in an annular array. The bottom end of the branch pipes 1103 extends movably through the outer wall of the reaction vessel 1 into the interior of the reaction vessel 1, and the branch pipes 1103 are close to the bottom of the reaction vessel 1.

[0044] The branch pipe 1103 has an opening angled toward the bottom of the reaction vessel 1. The branch pipe 1103 is provided with a check valve 1104 near its bottom end. The check valve 1104 is located outside the reaction vessel 1.

[0045] In the specific implementation process, during operation, carbon dioxide exhaust gas can be introduced into the annular pipe 1101 through the air inlet pipe 1102. The annular pipe 1101 then distributes the carbon dioxide exhaust gas into multiple branch pipes 1103. The multiple branch pipes 1103, which are arranged in an annular array, evenly transport the carbon dioxide exhaust gas into the reaction tank 1, thereby effectively increasing the gas-liquid contact area, improving the gas utilization rate, and further improving the uniformity and efficiency of gas-liquid mixing.

[0046] Among them, the check valve 1104 can effectively prevent the backflow of slurry and gas from affecting the normal air intake operation;

[0047] Among them, the branch pipe 1103 is sealed at the point where it penetrates reaction vessel 1;

[0048] The annular pipe 1101 has an inner diameter of 50 mm, and there are four branch pipes 1103. The included angle between adjacent branch pipes 1103 is 90°, and the inner diameter of the branch pipe 1103 is 10 mm. The connection between the annular pipe 1101 and the branch pipe 1103 adopts a reducing joint (the inner diameter transitions from 50 mm to 10 mm) to ensure that the flow rate of carbon dioxide exhaust gas in each branch pipe 1103 is uniform (the flow rate of each branch pipe is 0.5 m³ / h), thereby achieving uniform gas distribution in the reaction tank 1.

[0049] The branch pipe 1103 has an opening angle of 45° (the angle with the bottom of the reaction tank 1), and the opening faces the central axis of the reaction tank 1. The branch pipe 1103 extends 10cm into the interior of the reaction tank 1 to ensure that after the carbon dioxide gas is sprayed out from the branch pipe 1103, it can diffuse into the center of the tank and form a convective mixture with the coal ash slurry, avoiding bubble accumulation and improving gas-liquid contact efficiency.

[0050] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coal ash reaction device for solid waste carbon sequestration, comprising a reaction tank (1), characterized in that: The bottom of the reaction vessel (1) is provided with a discharge pipe (2) with a valve. The bottom of the reaction vessel (1) is provided with multiple support legs. The top of the reaction vessel (1) is fixedly installed with a lid (3). The top of the lid (3) is provided with a feed pipe (4). The top of the lid (3) is fixedly installed with a gearbox (5). The top of the gearbox (5) is fixedly installed with a geared motor (6). The output end of the geared motor (6) extends through to the inside of the gearbox (5). The output end of the geared motor (6) is fixedly connected to a main shaft (7). The bottom end of the main shaft (7) moves through the lid (3) and extends into the inside of the reaction vessel (1). Multiple first stirring rods (8) are fixedly connected to both sides of the main shaft (7). A first gear (10) is fixedly connected to the outside of the main shaft (7). A reverse stirring mechanism (9) includes a first rotating connector (901) and a drive shaft (902). The top of the first rotating connector (901) is fixedly connected to the bottom of the tank cover (3). A ring-shaped rotating seat (903) is rotatably connected to the bottom of the first rotating connector (901). The inner ring surface of the rotating seat (903) is provided with a drive tooth (904). Two secondary shafts (905) are fixedly connected to the bottom of the rotating seat (903). The two secondary shafts (905) are symmetrically distributed. Multiple second stirring rods (906) are fixedly connected to one side opposite to the shaft (905). The second stirring rods (906) and the first stirring rod (8) are arranged in an alternating pattern. The drive shaft (902) is rotatably mounted through the tank cover (3). A second gear (907) is fixedly connected to the top of the drive shaft (902). The second gear (907) meshes with the first gear (10). A third gear (908) is fixedly connected to the bottom of the drive shaft (902). The third gear (908) meshes with the drive gear (904). An air intake mechanism (11) is located both outside and inside the reaction vessel (1).

2. The coal ash reaction device for solid waste carbonization according to claim 1, characterized in that: The reaction vessel (1) is fixedly connected to a connecting seat (12), and the bottom end of the main shaft (7) moves through the connecting seat (12) and is rotatably connected to the connecting seat (12).

3. The coal ash reaction device for solid waste carbonization according to claim 1, characterized in that: The first gear (10) and the second gear (907) are both located inside the gearbox (5), and the top of the drive shaft (902) is rotatably connected to the top surface inside the gearbox (5) through the second rotating connector (909).

4. The coal ash reaction device for solid waste carbon sequestration according to claim 1, characterized in that: The bottom end of the sub-shaft (905) is close to the connecting seat (12) but does not contact it, and the distance between the bottom end of the sub-shaft (905) and the connecting seat (12) is 1cm-3cm.

5. The coal ash reaction device for solid waste carbonization according to claim 1, characterized in that: Multiple connecting ears (13) are provided on both sides of the lid (3) and the outside of the reaction vessel (1). Two adjacent connecting ears (13) are locked together by bolts (14). Two handles (15) are fixedly connected to the top of the lid (3).

6. The coal ash reaction device for solid waste carbon sequestration according to claim 1, characterized in that: The air intake mechanism (11) includes an annular pipe (1101), which is fixedly installed on the outside of the reaction tank (1). The top of the annular pipe (1101) is connected to an air intake pipe (1102), and the bottom of the annular pipe (1101) is connected to multiple branch pipes (1103) in an annular array. The bottom end of the branch pipe (1103) extends through the outer wall of the reaction tank (1) and into the interior of the reaction tank (1), and the branch pipe (1103) is close to the bottom of the reaction tank (1).

7. The coal ash reaction device for solid waste carbon sequestration according to claim 6, characterized in that: The branch pipe (1103) has an opening angle facing the bottom of the reaction vessel (1), and the branch pipe (1103) is provided with a check valve (1104) near its bottom end. The check valve (1104) is located outside the reaction vessel (1).

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