Continuous solid-liquid reaction device for gas treatment

Abstract

A continuous solid-liquid reaction device for gas treatment belongs to the technical field of flue gas desulfurization and manganese resource recovery equipment and comprises more than three reaction kettles which are connected in series through gas guide pipelines, each reaction kettle is provided with a gas inlet pipe joint, a feeding pipe joint, a gas outlet pipe joint and a discharging pipe joint, and a gas distribution device communicated with the gas inlet pipe joint is arranged in each reaction kettle. A stirring device is also arranged; the gas distribution device comprises more than two layers of gas distribution pipes which are communicated through a communication pipeline; a plurality of gas distribution holes are formed in the side walls of the gas distribution pipes; the stirring device comprises more than two layers of stirring paddles, and the stirring paddles are arranged above each layer of gas distribution pipe. The core design of'mixing gas with liquid without mixing 'is adopted, the gas distribution device is combined with stirring, so that gas is uniformly released in a small bubble form, the retention time is prolonged, and multi-stage full utilization of the gas is realized in cooperation with the gas series design. And multi-layer graded gas distribution is matched with layered stirring, so that gas-liquid-solid three-phase contact is sufficient, the reaction is stable, and deposition and short circuit are avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of flue gas desulfurization and manganese resource recovery equipment, specifically a continuous solid-liquid reaction device for gas treatment. Background Technology

[0002] In hydrometallurgical processes (such as sulfur dioxide reduction of manganese dioxide slurry) and similar gas-liquid-solid three-phase reaction processes, continuous processing is often required to improve efficiency. Current common implementation schemes have the following shortcomings:

[0003] (1) Single-boiler bubbling reactor: The gas is released from a single position at the bottom, which is unevenly distributed and easily forms a "short circuit" to float upward. The gas-liquid contact time is short and the gas utilization rate is low.

[0004] (2) Multi-stage series reaction system: Multiple independent absorption towers are connected in series in the process flow. Each absorption tower contains pyrolusite slurry. Flue gas flows through each absorption tower in sequence, where sulfur dioxide is absorbed by the slurry. The absorption reaction of the pyrolusite slurry in the first-stage absorption tower reaches its endpoint first. Then, the pyrolusite slurry in the first-stage absorption tower is transferred to a chemical tank for further processing. The pyrolusite slurry in subsequent absorption towers is transferred to the previous stage absorption tower. The transfer of solid and liquid materials between multiple towers can easily lead to series mixing, resulting in unclear reaction stages and making it difficult to achieve a controllable step-by-step reaction.

[0005] (3) Gas-liquid reactor with stirring: Although it can enhance mixing, the gas distribution structure is simple (usually a single layer) and the gas release area is limited. It is usually a single-layer stirring. For slurry containing solid particles, a solid deposition zone is easily formed at the bottom of the reactor, which affects continuous and stable operation.

[0006] Therefore, existing technologies generally suffer from problems such as low gas utilization rate, insufficient gas-liquid-solid contact, and difficulty in achieving gas cascade utilization and clear solid-liquid reaction stages. Utility Model Content

[0007] The purpose of this invention is to provide a continuous solid-liquid reaction device for gas processing, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0008] This utility model provides a continuous solid-liquid reaction device for gas treatment, including three or more reaction vessels connected in series by gas guiding pipes. Each reaction vessel is equipped with an inlet pipe connector, a feed pipe connector, an outlet pipe connector, and a discharge pipe connector that communicate with the interior of the reaction vessel. The reaction vessel is equipped with a gas distribution device that communicates with the inlet pipe connector, and the reaction vessel is also equipped with a stirring device.

[0009] The air distribution device includes two or more layers of air distribution pipes connected by a connecting pipe, and the side walls of the air distribution pipes are provided with a number of air distribution holes.

[0010] The stirring device includes two or more layers of stirring paddles, with a stirring paddle located above each layer of air distribution pipe.

[0011] A further option is that the air distribution pipe is one or both of the following: an annular coil and a branched pipe system.

[0012] A further embodiment: The annular coil has a planar spiral structure, and the wall of the annular coil has several air distribution holes. The outer end of the annular coil is connected to an air inlet pipe joint and / or a connecting pipe.

[0013] A further embodiment: The branched piping system includes a main gas distribution pipe and gas distribution branch pipes. Several gas distribution branch pipes are arranged at intervals on the side walls of both ends of the main gas distribution pipe. Several gas distribution holes are opened on the side walls of the gas distribution branch pipes. The main gas distribution pipe is connected to an air inlet pipe joint and / or a connecting pipe.

[0014] A further option: The reactor at the end is equipped with a circulation pipe connector.

[0015] A further embodiment: the horizontal height of the exhaust pipe connector is higher than the horizontal height of the intake pipe connector.

[0016] A further proposed solution: The vent pipe connector of the reactor at the end is located at the top of the reactor.

[0017] A further embodiment: the discharge pipe connector is located on the side wall of the reactor near the bottom plate.

[0018] A further embodiment: The stirring device also includes a stirring motor installed on top of the reactor, the output shaft of the stirring motor is connected to a stirring shaft, the stirring shaft extends into the reactor and is connected to two or more layers of stirring paddles.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. High gas utilization rate: The gas distribution device combined with stirring makes the gas released evenly in the form of small bubbles and prolongs the residence time. With the gas series design, the gas is fully utilized in multiple stages.

[0021] 2. Good reaction efficiency and stability: Multi-layered gas distribution, combined with layered stirring, ensures sufficient contact between the gas, liquid, and solid phases, resulting in a stable reaction and effectively preventing solid deposition.

[0022] 3. Clear process flow: The core design of "gas crosses but liquid crosses" allows the gas to be utilized in stages while solid and liquid materials do not need to be transferred to other reactors. The slurry in different reactors will not mix and can react in a clear stage sequence, making it easy to control and optimize process parameters.

[0023] 4. Suitable for continuous production: The structural design avoids sedimentation and short circuits, making it particularly suitable for continuous processing of slurries containing solid particles. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel in a preferred embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of the reaction vessel in another preferred embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the internal structure of the reactor in another preferred embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the reaction vessel in another preferred embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the annular coil in a preferred embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the branched tubular system in a preferred embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the structure for installing the slurry discharge pipe in a preferred embodiment of the present invention.

[0033] In the diagram: 1-Reaction vessel; 11-Inlet pipe connector; 12-Feed pipe connector; 13-Outlet pipe connector; 14-Outlet pipe connector; 15-Circulation pipe connector; 16-Slurry discharge pipe; 17-Sampling pipe; 2-Agitator; 21-Agitator motor; 22-Agitator shaft; 23-Upper agitator; 24-Lower agitator; 3-Gas guide pipe; 41-Upper gas distribution pipe; 42-Connecting pipe; 43-Lower gas distribution pipe; 44-Gas distribution hole; 451-Main gas distribution pipe; 452-Branch gas distribution pipe; 453-Connecting pipe interface. Detailed Implementation

[0034] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0036] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Please see Figures 1-5 As shown, this utility model provides a continuous solid-liquid reaction device for gas treatment, including three or more reaction vessels 1 connected in series by gas guide pipes 3. Each reaction vessel 1 is provided with an inlet pipe joint 11, a feed pipe joint 12, an outlet pipe joint 13, and a discharge pipe joint 14 that communicate with the inside of the reaction vessel 1. The reaction vessel 1 is provided with a gas distribution device that communicates with the inlet pipe joint 11. The reaction vessel 1 is also provided with a stirring device 2.

[0040] The air distribution device includes two or more layers of air distribution pipes connected by a connecting pipe 42, and the side walls of the air distribution pipes are provided with a number of air distribution holes 44.

[0041] The stirring device 2 includes two or more layers of stirring paddles, with a stirring paddle above each layer of air distribution pipe.

[0042] For example, please refer to Figure 1 As shown, this embodiment includes three reactors 1. Each reactor 1 has a vertical, flat-bottomed structure and can be mounted on the ground using a frame. The first reactor 1, located at the first end, has its inlet pipe joint 11 sealed to an inlet pipe. The first reactor 1's outlet pipe joint 13 is sealed to the second reactor 1's inlet pipe joint 11 via a gas guide pipe 3. The second reactor 1's outlet pipe joint 13 is also sealed to the third reactor 1's inlet pipe joint 11 via a gas guide pipe 3. The third reactor 1's outlet pipe joint 13 is sealed to a gas discharge pipe, which is equipped with a gate. The feed pipe joints 12 of each of the three reactors 1 are independently and sealed to grouting pipes, and the discharge pipe joints 14 are independently and sealed to grout discharge pipes. Both the grouting pipe and the discharge pipe joint 14 are equipped with gates. The other end of the inlet pipe of the first reactor 1 is connected to a flue. The inlet pipe is equipped with a gate; opening the gate allows sulfur dioxide-containing flue gas from the flue to be introduced into the gas distribution device within the first reactor 1. Preferably, please refer to [reference needed]. Figures 2-5 As shown, the gas distribution device comprises upper and lower layers, each layer having several gas distribution holes 44. Under the gas supply pressure, the flue gas is dispersed and overflows from the several gas distribution holes 44. Inside the reactor 1, the flue gas flows from bottom to top, passing through the gas guide pipe 3 sequentially through the gas distribution device in the second reactor 1, the second reactor 1, the gas distribution device in the third reactor 1, and the third reactor 1, before being discharged through the gas discharge pipe.

[0043] During operation, first close the gate of the discharge pipe joint 14. To prevent the slurry from entering the gas distribution device through the gas distribution hole, the gate of the inlet pipe needs to be opened first to provide a certain gas supply pressure. Then, open the gate of the grouting pipe of each reactor. In this case, to prevent the flue gas from being discharged directly through the gas discharge pipe without reaction, the gate of the gas discharge pipe needs to be closed first. Prioritize setting a circulation pipe joint 15 at the third reactor 1 at the end. The circulation pipe joint 15 is connected to the flue through the flue gas circulation pipe. The flue gas circulation pipe is equipped with a gate. At this time, open the gate of the flue gas circulation pipe. The unreacted flue gas returns to the flue through the flue gas circulation pipe and enters the gas distribution device of the first reactor 1 through the inlet pipe again. After the slurry injected into each reactor 1 submerges all the gas distribution holes 44 and waits for a certain period of time, close the gate of the flue gas circulation pipe and open the gate of the gas discharge pipe. At this time, the flue gas overflowing from each of the gas distribution holes 44 fully contacts and reacts with the slurry, emerges from the slurry, and is discharged from the third reactor 1 through the gas discharge pipe. The end of the gas discharge pipe can also be equipped with a tail gas absorption device so that the discharged gas meets the emission standards, and the slurry generates manganese sulfate product.

[0044] During operation, the stirring device 2 agitates the slurry. The number of stirring paddle layers is preferably the same as the number of gas distribution pipe layers, causing severe disturbance to the gas release zone of each gas distribution pipe layer, preventing solid particle deposition. The multi-layer gas distribution and multi-layer stirring work together to achieve thorough mixing of the materials in reactor 1 and long-path contact with the gas. After the slurry injection reaches the preset amount, the gate valves of the slurry injection pipes of each reactor 1 are closed, and flue gas continues to be introduced. After a period of flue gas absorption, the slurry absorption reaction in the first reactor 1 at the beginning will reach its endpoint first. Slurry samples are taken and filtered through the discharge pipe of the first reactor 1, yielding yellow-brown slag. The manganese content in the slag is analyzed to determine whether the slurry needs to be replaced. When slag needs to be replaced, close the gate valve of the gas exhaust pipe, open the gate valve of the flue gas circulation pipe, and open the gate valve of the discharge pipe joint 14 of the first reactor 1 to discharge the slurry in the first reactor 1. The slurry in the second and third reactors 1 continues to react with the flue gas. To avoid incomplete absorption of sulfur dioxide in the flue gas due to the two-stage reaction, the flue gas will return to the flue through the flue gas circulation pipe instead of being discharged through the gas exhaust pipe. After the slurry in the first reactor 1 has been completely discharged, close the gate valve of the discharge pipe joint 14, open the gate valve of the grouting pipe, and re-inject the slurry to be treated into the first reactor 1. When the re-injected slurry submerges all the air distribution holes 44 in the first reactor 1, and after waiting for a certain period of time, close the gate valve of the flue gas circulation pipe and open the gate valve of the gas exhaust pipe. Then, periodically extract the slurry from each reactor 1 through the slurry discharge pipe for filtration, and test the yellow-brown slag to determine whether the slurry needs to be replaced. When the slurry needs to be replaced, perform the above-mentioned slurry discharge treatment on the corresponding reactor 1.

[0045] To prevent flue gas leakage from the slurry discharge pipe when the slurry is about to be completely discharged during slurry replacement:

[0046] For example, each reactor 1 is equipped with a level gauge, preferably an external ultrasonic level gauge, to detect the liquid level height inside the reactor 1. The external ultrasonic level gauge is selected from existing technology, and its structure and working principle will not be described in detail. It mainly includes a measuring probe, a calibration probe, and a level gauge main unit that are electrically connected to each other. The measuring probe is installed on the bottom outer wall of the reactor 1, and the calibration probe is installed on the side outer wall of the reactor 1. The frame used to install the reactor 1 is preferably a leg-type or a hollow frame type, which facilitates the installation of the measuring probe of the external ultrasonic level gauge on the bottom outer wall of the reactor 1. When the reading of the external ultrasonic level gauge of the reactor 1 is consistent with the preset height, the gate of the corresponding reactor 1's discharge pipe joint 14 is closed. The preset height refers to the height of the top wall of the discharge pipe joint 14 of the reactor 1 being higher than the bottom inner wall of the reactor 1. When the slurry height is equal to the top wall of the discharge pipe joint 14, the gate of the discharge pipe joint 14 of the reactor 1 is closed to prevent the inner cavity of the discharge pipe joint 14 from being exposed from the slurry and to prevent the flue gas from leaking from the slurry discharge pipe of the reactor 1.

[0047] Another example is shown below. Figure 8 As shown, the slurry discharge pipe 16 has a U-shaped bend located at the end of the slurry discharge pipe 16 near the discharge pipe joint 14. When slurry is discharged through the slurry discharge pipe 16, some slurry will remain in the U-shaped bend, forming a liquid seal to prevent flue gas from escaping from the slurry discharge pipe 16. A sampling pipe 17, connected to the side wall of the slurry discharge pipe 16, is also provided. The sampling pipe 17 is located between the gate of the discharge pipe joint 14 and the U-shaped bend. The sampling pipe 17 also has a gate. First, open the gate of the sampling pipe 17, then open the gate of the discharge pipe joint 14 to take samples. The gate of the discharge pipe joint 14 must be closed promptly, and the gate of the sampling pipe 17 must be closed after all the slurry in the sampling pipe 17 has flowed out. To avoid unrepresentative sampling data, multiple samples can be collected and independently stored for testing, ensuring that at least one sample of slurry from the reactor 1 is collected. The sampling pipe 17 can also be connected to flushing equipment to flush the slurry discharge pipe 16 regularly to prevent excessive slag deposition in the U-bend, which would affect slurry discharge. During flushing, the gate of the discharge pipe joint 14 is closed and the gate of the sampling pipe 17 is opened.

[0048] This application employs a core design of "gas-to-liquid but not gas-to-liquid," enabling the gas to be utilized in stages while preventing the transfer of solid and liquid materials to other reactors 1 and avoiding mixing with the slurry in other reactors 1. This allows for reactions in a clearly defined stage sequence, facilitating control and optimization of process parameters. The gas distribution device, combined with stirring, ensures the gas is released uniformly in the form of small bubbles, extending residence time. This, combined with the gas series design, achieves multi-stage full utilization of the gas. Multi-layered, staged gas distribution, coupled with layered stirring, ensures sufficient contact between the gas, liquid, and solid phases, resulting in a stable reaction and preventing sedimentation and short-circuiting. This design is particularly suitable for the continuous processing of slurries containing solid particles.

[0049] For example, the gas distribution device includes an upper gas distribution pipe 41 and a lower gas distribution pipe 43 connected by a connecting pipe 42. The stirring device 2 also includes a stirring motor 21 disposed on the top of the reactor 1. The output shaft of the stirring motor 21 is connected to a stirring shaft 22. The stirring shaft 22 extends into the reactor and is connected to an upper stirring paddle 23 and a lower stirring paddle 24. The lower gas distribution pipe 43 is located in the lower part of the reactor, near the bottom. The upper gas distribution pipe 41 and the lower gas distribution pipe 43 are connected by a connecting pipe 42, and are spaced apart by a distance to allow the lower stirring paddle 24 to move between them. The stirring range of the lower stirring paddle 24 can cover the gas release area of ​​the upper gas distribution pipe 41 and the lower gas distribution pipe 43, as well as the entire bottom of the reactor. The upper stirring paddle 23 is located above the upper gas distribution pipe 41, in the upper-middle part of the reactor 1, and its main function is to promote the slurry to form an axial (from bottom to top) overall circulation. The gas distribution device can be fixedly installed in the reactor 1 with appropriate support fasteners to prevent the upper gas distribution pipe 41 and the lower gas distribution pipe 43 from moving due to gas supply pressure. Both the upper gas distribution pipe 41 and the lower gas distribution pipe 43 have several gas distribution holes 44 on their sidewalls. Preferably, the diameter of the gas distribution holes 44 in the upper gas distribution pipe 41 is smaller than that in the lower gas distribution pipe 43. This allows the gas to be released in larger volumes in the lower gas distribution pipe 43 and in fine bubbles in the upper gas distribution pipe 41, thus achieving a gradual and uniform release of gas from bottom to top. The differentiated setting of the gas distribution holes 44 can effectively prevent gas from escaping in a single area, reduce gas short-circuiting, extend the residence path of the gas in the slurry, and improve the gas-liquid-solid contact efficiency. This enables the phased and uniform release of gas in the reaction zone. At the same time, the layered stirring structure keeps the slurry in different height areas in a disturbed state, further ensuring uniform gas distribution.

[0050] In some embodiments, the air distribution pipe is one or both of annular coils and branched pipe systems. See also... Figure 1 , Figure 2 , Figure 6 As shown, the annular coil has a planar spiral structure, and the coil wall has several air distribution holes 44. The outer end of the annular coil is connected to an air inlet connector 11 and / or a connecting pipe 42. Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 7As shown, the branched pipe system includes a main gas distribution pipe 451 and branch gas distribution pipes 452 located on the same plane. Several branch gas distribution pipes 452 are spaced apart on the side walls of both ends of the main gas distribution pipe 451. The end of each branch gas distribution pipe 452 away from the main gas distribution pipe 451 is closed. Several gas distribution holes 44 are provided on the side wall of each branch gas distribution pipe 452. The main gas distribution pipe 451 is connected to the air inlet pipe joint 11 and / or the connecting pipe 42. Both the annular coil and the branched pipe system have holes in their centers for the stirring shaft 22 to pass through, ensuring that the gas distribution device does not interfere with the movement of the stirring device 2.

[0051] For example, please refer to Figure 2 , Figure 6 As shown, both the upper gas distribution pipe 41 and the lower gas distribution pipe 43 are annular coils. The outer port of the lower gas distribution pipe 43 is connected to the air inlet pipe connector 11, and the inner port is closed. Both ends of the upper gas distribution pipe 41 are closed, and the outer end of the upper gas distribution pipe 41 is connected to the outer end of the lower gas distribution pipe 43 through the connecting pipe 42. The flue gas flows from the outside to the inside within the two annular coils and overflows from the gas distribution holes 44 on the side wall of the annular coils, dispersing the flue gas in layers in the slurry, expanding the contact surface between the flue gas and the slurry, which is beneficial for the reaction.

[0052] For example, please refer to Figure 3 , Figure 7 As shown, both the upper gas distribution pipe 41 and the lower gas distribution pipe 43 are branched pipe systems. The main gas distribution pipe 451 has a connecting pipe interface 453 in the middle. The main gas distribution pipe 451 of the lower gas distribution pipe 43 is connected to the air inlet pipe connector 11. The connecting pipe interface 453 of the main gas distribution pipe 451 of the lower gas distribution pipe 43 is connected to the connecting pipe interface 453 of the main gas distribution pipe 41 of the upper gas distribution pipe 41 through a connecting pipe 42. The main gas distribution pipe 451 guides the flue gas into each gas distribution branch pipe 452, dispersing the flue gas in layers in the slurry, expanding the contact surface between the flue gas and the slurry, which is beneficial to the reaction.

[0053] For example, please refer to Figure 4 , Figure 6 , Figure 7 As shown, the upper gas distribution pipe 41 is an annular coil, and the lower gas distribution pipe 43 is a branched pipe system. The main gas distribution pipe 451 is connected to the air inlet pipe connector 11. Both the inner and outer ends of the annular coil are closed, and the outer end of the annular coil is connected to the connecting pipe interface 453 of the main gas distribution pipe 451 through the connecting pipe 42. The upper gas distribution pipe 41 and the lower gas distribution pipe 43 adopt different structures, which changes the direction of the flue gas in the lower layer, prolongs the residence time of the flue gas in the slurry, and makes the reaction more complete.

[0054] For example, please refer to Figure 5 , Figure 6 , Figure 7As shown, the upper gas distribution pipe 41 is a branched pipe system, and the lower gas distribution pipe 43 is an annular coil. The outer end of the annular coil is connected to the air inlet pipe connector 11, and the inner end is closed. The outer end of the annular coil is connected to the connecting pipe interface 453 of the main gas distribution pipe 451 through the connecting pipe 42. The upper gas distribution pipe 41 and the lower gas distribution pipe 43 adopt different structures, which changes the direction of the flue gas in the lower layer, prolongs the residence time of the flue gas in the slurry, and makes the reaction more complete.

[0055] It should be noted that, Figure 7 The branched pipe system shown is specifically used as the lower air distribution pipe 43. The branched pipe system, which is used as the upper air distribution pipe 41, does not need to be connected to the air inlet pipe connector 11 and does not have an opening for connection with the air inlet pipe connector 11.

[0056] In some embodiments, please refer to Figure 1 As shown, the horizontal height of the vent pipe joint 13 is higher than that of the inlet pipe joint 11, and the height of the injected slurry is lower than that of the vent pipe joint 13, so that the flue gas can flow upward from the vent pipe joint 13 and out of the reactor 1 after the slurry emerges. Preferably, the inlet pipe joint 11 is located on the side wall of the reactor 1 near the bottom, and the vent pipe joint 13 is located on the side wall of the reactor 1 near the top.

[0057] In some embodiments, please refer to Figure 1 As shown, the gas outlet connector 13 of the reactor 1 at the end is located at the top of the reactor 1, which facilitates the better flow of flue gas out of the reactor 1.

[0058] In some embodiments, please refer to Figure 1 As shown, the discharge pipe joint 14 is located on the side wall of the reactor 1 near the bottom plate, which facilitates better discharge of the slurry.

[0059] It should be noted that the device is equipped with sealing measures at all points that require sealing. The sealing measures are selected from existing technologies. All gates are existing technologies. Flue gas can be driven by a fan, and slurry can be extracted by a pump. In order to avoid the slurry level in reactor 1 from being too high, the level can also be controlled by a pump.

[0060] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A continuous solid-liquid reaction apparatus for gas treatment, characterized by comprising: The reactor includes three or more reactors connected in series by gas guide pipes. Each reactor is equipped with an inlet pipe connector, a feed pipe connector, an outlet pipe connector, and a discharge pipe connector that communicate with the interior of the reactor. The reactor is equipped with a gas distribution device that communicates with the inlet pipe connector. The reactor is also equipped with a stirring device. The air distribution device includes two or more layers of air distribution pipes connected by a connecting pipe, and the side walls of the air distribution pipes are provided with a number of air distribution holes. The stirring device includes two or more layers of stirring paddles, with a stirring paddle located above each layer of air distribution pipe.

2. The continuous solid-liquid reaction apparatus for gas treatment according to claim 1, wherein The gas distribution pipe is one or both of the following: annular coil and branched pipe system.

3. The continuous solid-liquid reaction apparatus for gas treatment according to claim 2, wherein The annular coil has a planar spiral structure, and the wall of the annular coil has several air distribution holes. The outer end of the annular coil is connected to an air inlet pipe joint and / or a connecting pipe.

4. The continuous solid-liquid reaction apparatus for gas treatment according to claim 2, wherein The branched piping system includes a main gas distribution pipe and gas distribution branch pipes. Several gas distribution branch pipes are arranged at intervals on the side walls of both ends of the main gas distribution pipe. Several gas distribution holes are opened on the side walls of the gas distribution branch pipes. The main gas distribution pipe is connected to the air inlet pipe joint and / or connecting pipe.

5. The continuous solid-liquid reaction apparatus for gas treatment according to claim 1, wherein The reactor at the end is equipped with a circulation pipe connector.

6. The continuous solid-liquid reaction apparatus for gas treatment according to claim 1, wherein The horizontal height of the exhaust pipe connector is higher than that of the intake pipe connector.

7. The continuous solid-liquid reaction apparatus for gas treatment according to claim 6, wherein The gas outlet connector of the reactor at the end is located at the top of the reactor.

8. The continuous solid-liquid reaction apparatus for gas treatment according to claim 1, wherein The discharge pipe joint is located on the side wall of the reactor near the bottom plate.

9. The continuous solid-liquid reaction apparatus for gas treatment according to claim 1, wherein The stirring device also includes a stirring motor installed on the top of the reactor. The output shaft of the stirring motor is connected to a stirring shaft, which extends into the reactor and is connected to two or more layers of stirring paddles.

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