Alkali dust recovery system for caustic soda flake production

Abstract

The utility model relates to the technical field of dust collection, in particular to an alkali dust recovery system for caustic soda flake production, which comprises a dust dissolving tank, an air outlet pipe communicated with the inside of the dust dissolving tank is arranged at the top of the dust dissolving tank, and an air exhauster is communicated with one end of the air outlet pipe far away from the dust dissolving tank; the top of the dust dissolving tank communicates with a liquid inlet pipe communicating with the interior of the dust dissolving tank, an air inlet communicating with the interior of the dust dissolving tank is formed in one side of the bottom of the dust dissolving tank and communicates with an air inlet pipe vertically arranged on the outer side of the dust dissolving tank, and a discharging barrel communicating with the interior of the dust dissolving tank is arranged at the bottom of the dust dissolving tank. The dust dissolving tank and the air exhauster are arranged, the dust dissolving tank is filled with proper process condensate through the liquid inlet pipe, the air exhauster works to extract air mixed with alkali dust in the caustic soda flake machine or the packaging machine into the dust dissolving tank, the dust dissolving tank is filled with the proper process condensate through the liquid inlet pipe, and the dust dissolving tank is filled with the proper process condensate through the air exhauster. And dust in the air is dissolved in the process condensate, so that systematic recovery is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collection, in particular to an alkali dust recovery system for caustic soda production. Background Technique

[0002] Caustic soda generally refers to sodium hydroxide, also known as caustic soda, soda ash, and lye. It is an inorganic compound. Sodium hydroxide has strong alkalinity and extremely strong corrosiveness. It can be used as an acid neutralizer, complexing masking agent, precipitating agent, precipitation masking agent, color developing agent, saponifying agent, peeling agent, detergent, etc., and has a very wide range of uses. During the production process of caustic soda, due to the need to mix and process various chemical dusts, there is a lot of caustic soda dust (hereinafter referred to as alkali dust) in its production environment, and a recovery and treatment device is required to recover and purify the surrounding air.

[0003] When the existing recovery and treatment device purifies alkali dust during the production process of caustic soda, the recovery and treatment device is first connected to the exhaust gas pipelines of the caustic soda machine and the packaging machine. The alkali dust generated inside the caustic soda machine and the packaging machine is sucked through a fan, and then filtered through the filter element in the recovery and treatment device to prevent the alkali dust from spilling into the external environment. Subsequently, the filtered alkali dust is uniformly recovered and treated. However, during the recovery process, the alkali dust is easily adsorbed on the filter element, resulting in blockage of the filter element. It is necessary to clean it regularly and often replace the filter bag, resulting in high maintenance costs and affecting the recovery and treatment efficiency at the same time. Content of the Utility Model

[0004] The purpose of the utility model is to provide an alkali dust recovery system for caustic soda production, which solves the problems in the prior art that the alkali dust is easily adsorbed on the filter element, resulting in blockage of the filter element, and it is necessary to clean it regularly and often replace the filter bag, resulting in high maintenance costs and affecting the recovery and treatment efficiency at the same time.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An alkali dust recovery system for caustic soda production includes a dust dissolving tank. An air outlet pipe communicated with the inside of the dust dissolving tank is arranged at the top of the dust dissolving tank, and an air extractor is communicated with the end of the air outlet pipe far away from the dust dissolving tank; a liquid inlet pipe communicated with the inside of the dust dissolving tank is arranged at the top of the dust dissolving tank. An air inlet is arranged at one side of the bottom of the dust dissolving tank and is communicated with the inside of the dust dissolving tank. An air inlet pipe vertically arranged outside the dust dissolving tank is communicated with the air inlet. A discharging cylinder communicated with the inside of the dust dissolving tank is arranged at the bottom of the dust dissolving tank. A discharging pipe is communicated with one side of the bottom of the discharging cylinder, and a valve is arranged on the discharging pipe.

[0007] A further technical solution is that a motor is installed at the bottom of the discharging cylinder. The rotating shaft of the motor rotates through a through hole and penetrates into the inside of the discharging cylinder, and is drivingly connected with a transmission rod vertically arranged inside the dust dissolving tank. A plurality of stirring rods are symmetrically distributed along the circumference of the transmission rod, and the stirring rods are horizontally arranged inside the dust dissolving tank.

[0008] A further technical solution is that a conveying cavity is provided inside the transmission rod along its length direction, a transmission cavity is provided inside the stirring rod along its length direction, the conveying cavity is communicated with the transmission cavity, and the ends of the stirring rods corresponding to each other up and down and far from the transmission rod are both connected to a hollow tube. The hollow tube is communicated with the transmission cavity, the hollow tube is vertically arranged in the dust dissolving tank, a plurality of water outlets are arranged on the hollow tube along its length direction, a spray head is arranged on the water outlet, and the spray head is arranged towards the inner wall of the dust dissolving tank; the conveying cavity is communicated with the liquid inlet pipe through a rotary flange, and a high-pressure pump is communicated and arranged on the liquid inlet pipe.

[0009] A further technical solution is that an installation hole communicated with the inside thereof is opened at the top of the dust dissolving tank, the top of the rotary flange is hermetically arranged in the installation hole and communicated with the liquid inlet pipe, and the bottom of the rotary flange is placed inside the dust dissolving tank and communicated with the conveying cavity.

[0010] A further technical solution is that a rotary sealing ring and a rotating bearing are respectively arranged in the through hole from top to bottom. The rotary sealing ring is sleeved outside the rotating shaft; the outer ring of the rotating bearing is connected with the inner wall of the through hole, and the inner ring of the rotating bearing is connected with the outside of the rotating shaft.

[0011] A further technical solution is that a three-way pipe is communicated and arranged at one end of the air inlet pipe far from the dust dissolving tank. The first interface of the three-way pipe is communicated with the air inlet pipe, and plug valves are installed on both the second interface and the third interface of the three-way pipe.

[0012] A further technical solution is that an observation port communicated with the inside thereof is opened on the side of the dust dissolving tank, and a transparent glass is fixedly arranged in the observation port.

[0013] Compared with the prior art, the beneficial effect of the present utility model is that by arranging a dust dissolving tank and an air extractor, the inside of the dust dissolving tank is filled with appropriate process condensate through the liquid inlet pipe. The air extractor works to extract the air mixed with alkali dust inside the caustic soda machine or the packaging machine into the dust dissolving tank, so that the dust in the air is dissolved in the process condensate. The treated air rises from the process condensate and is discharged through the air extractor. The process cooling liquid dissolved with dust is subsequently discharged and recycled through the discharge pipe, thereby realizing the systematic recovery of alkali dust. Description of the Drawings

[0014] Figure 1 It is a three-dimensional schematic diagram of an alkali dust recovery system for caustic soda production of the present utility model.

[0015] Figure 2 It is a partial sectional view schematic diagram of an alkali dust recovery system for caustic soda production of the present utility model.

[0016] Figure 3 It is a partial sectional connection schematic diagram of the motor, the rotating bearing and the discharging barrel of the present utility model.

[0017] Figure 4 This is a schematic cross-sectional connection diagram of the drive rod, stirring rod and hollow tube of the present utility model.

[0018] Figure 5 This is a schematic connection diagram of the mounting hole, rotary flange, drive rod and liquid inlet pipe of the present utility model.

[0019] Icon: 1 - dust dissolving tank, 2 - air outlet pipe, 3 - air extractor, 4 - liquid inlet pipe, 5 - air inlet, 6 - air inlet pipe, 7 - discharging cylinder, 8 - discharging pipe, 9 - valve, 10 - motor, 11 - rotating shaft, 12 - drive rod, 13 - stirring rod, 14 - conveying cavity, 15 - transmission cavity, 16 - hollow tube, 17 - spray head, 18 - rotary flange, 19 - high-pressure pump, 20 - mounting hole, 21 - through hole, 22 - rotary sealing ring, 23 - rotating bearing, 24 - three-way pipe, 25 - first interface, 26 - second interface, 27 - third interface, 28 - plug valve, 29 - transparent glass. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Embodiment 1:

[0022] Refer to Figure 1 、 Figure 2It is shown that a caustic soda dust recovery system for caustic soda production according to the present utility model includes a dust dissolving tank 1. An air outlet pipe 2 communicating with the inside thereof is provided at the top of the dust dissolving tank 1. One end of the air outlet pipe 2 far away from the dust dissolving tank 1 is communicated with an air extractor 3, and the installation position of the air extractor 3 can be determined according to actual situations; a liquid inlet pipe 4 communicating with the inside thereof is provided at the top of the dust dissolving tank 1. An air inlet 5 communicating with the inside thereof is provided at one side of the bottom of the dust dissolving tank 1. An air inlet pipe 6 vertically arranged outside the dust dissolving tank 1 is communicated with the air inlet 5. A discharge cylinder 7 communicating with the inside thereof is provided at the bottom of the dust dissolving tank 1. A discharge pipe 8 is communicated with one side of the bottom of the discharge cylinder 7. A valve 9 is provided on the discharge pipe 8. By setting the valve 9, it is convenient to control the discharge of the mixed liquid of the caustic soda dust and the process condensate inside the dust dissolving tank 1. During actual use, when the device processes and recovers the caustic soda dust mixed in the air inside the caustic soda machine or the packaging machine, the valve 9 is closed, the air inlet pipe 6 is communicated with the waste gas pipe of the caustic soda machine or the packaging machine, and an appropriate amount of process condensate is injected into the dust dissolving tank 1 through the liquid inlet pipe 4. The air inlet pipe 6 is vertically arranged outside the dust dissolving tank 1, which can prevent the process condensate inside the dust dissolving tank 1 from flowing back into the caustic soda machine or the packaging machine along the air inlet pipe 6. The air extractor 3 works to extract the air mixed with caustic soda dust inside the caustic soda machine or the packaging machine into the dust dissolving tank 1. The caustic soda dust mixed in the air dissolves in the process condensate. The processed air rises from the process condensate and is discharged through the exhaust pipe under the extraction of the air extractor 3. The process cooling liquid dissolved with caustic soda dust is subsequently discharged and recovered through the discharge pipe 8. The discharge pipe 8 can be connected to a dedicated waste water storage tank through a pipeline according to actual situations, so as to specifically recover the process cooling liquid dissolved with dust, thereby avoiding the subsequent need to separately treat the mixed liquid of the process condensate and the caustic soda dust and improving the recovery efficiency.

[0023] Embodiment 2:

[0024] Based on Embodiment 1, refer to Figures 1 to 3 It is shown that a motor 10 is installed at the bottom of the discharge cylinder 7. The rotating shaft 11 of the motor 10 rotates through a through hole 21 and penetrates into the discharge cylinder 7, and is drivingly connected to a transmission rod 12 vertically arranged inside the dust dissolving tank 1. A plurality of stirring rods 13 are symmetrically distributed along the circumferential direction of the transmission rod 12. The stirring rods 13 are horizontally arranged inside the dust dissolving tank 1. During actual use, the motor 10 drives the transmission rod 12 to rotate, and then drives the stirring rods 13 to rotate, which can ensure that the caustic soda dust mixed in the air extracted from the caustic soda machine or the packaging machine is completely dissolved in the process cooling liquid, and at the same time accelerates the dissolution of the caustic soda dust in the process condensate, ensuring the dust removal efficiency.

[0025] Refer to Figure 4It is shown that a conveying cavity 14 is provided inside the transmission rod 12 along its length direction, a transmission cavity 15 is provided inside the stirring rod 13 along its length direction, the conveying cavity 14 is communicated with the transmission cavity 15, and one ends of the stirring rods 13 corresponding up and down and away from the transmission rod 12 are all connected with a hollow tube 16, the hollow tube 16 is communicated with the transmission cavity 15, the hollow tube 16 is vertically arranged in the dust dissolving tank 1, a plurality of water outlets are formed in the hollow tube 16 along its length direction, and a spray head 17 is arranged on the water outlet, and the spray head 17 is arranged towards the inner wall of the dust dissolving tank 1; the conveying cavity 14 is communicated with the liquid inlet pipe 4 through a rotary flange 18, a high-pressure pump 19 is communicated and arranged on the liquid inlet pipe 4. By arranging the rotary flange 18, it can be ensured that when the motor 10 drives the transmission rod 12 to rotate, it can avoid winding with the liquid inlet pipe 4. In the actual use process, when the mixed liquid of the process condensate and the alkali dust inside the dust dissolving tank 1 is discharged, when the mixed liquid of the process condensate and the alkali dust is relatively turbid, the alkali dust may adhere to the inner wall of the dust dissolving tank 1. At this time, the process condensate can be injected through the liquid inlet pipe 4, respectively through the conveying cavity 14, the transmission cavity 15 and the hollow tube 16, and finally sprayed out through the spray head 17. The high-pressure pump 19 can increase the pressure of the process condensate, so that the process condensate sprayed out by the spray head 17 has an impact force. At the same time, the motor 10 drives the transmission rod 12 to rotate, driving the spray head 17 to rotate. The process condensate sprayed out by the spray head 17 can wash the alkali dust adhering to the inner wall of the dust dissolving tank 1, thereby cleaning the inside of the dust dissolving tank 1, preventing the alkali dust not discharged through the discharge pipe 8 from adhering to the inner wall of the dust dissolving tank 1 and scaling, affecting the dust dissolving tank 1, ensuring that the alkali dust inside the dust condensation tank is fully discharged for recycling, and at the same time, the process condensate can also be directly filled through the spray head 17. Since the process condensate sprayed out by the spray head 17 has an impact force, the alkali dust adhering to the spray head 17 will not block the spray head 17.

[0026] Refer to Figure 5 It is shown that an installation hole 20 communicated with its inside is formed at the top of the dust dissolving tank 1, the top of the rotary flange 18 is arranged in the installation hole 20 and is communicated with the liquid inlet pipe 4, and the bottom of the rotary flange 18 is placed inside the dust dissolving tank 1 and is communicated with the conveying cavity 14. In the actual use process, by arranging the installation hole 20 to install the rotary flange 18, it can be ensured that when in use, the motor 10 drives the transmission rod 12 to rotate smoothly without winding with the liquid inlet pipe 4, and at the same time, it is ensured that the conveying cavity 14 inside the transmission rod 12 is communicated with the liquid inlet pipe 4 through the rotary flange 18, ensuring that the process condensate inside the liquid inlet pipe 4 smoothly enters the conveying cavity 14.

[0027] Refer to Figure 3As shown, a rotating sealing ring 22 and a rotating bearing 23 are respectively provided in the through hole 21 from top to bottom. The rotating sealing ring 22 is sleeved on the outer side of the rotating shaft 11; the outer ring of the rotating bearing 23 is connected to the inner wall of the through hole 21, and the inner ring of the rotating bearing 23 is connected to the outer side of the rotating shaft 11. In actual use, by providing the rotating bearing 23, the stability of the motor 10 when driving the transmission rod 12 to rotate can be ensured, and by providing the rotating sealing ring 22, the sealing performance at the through hole 21 can be ensured to prevent the process condensate inside the dust dissolution tank 1 from leaking out when the motor 10 drives the transmission rod 12 to rotate.

[0028] Embodiment 3:

[0029] See also Figure 1 , Figure 2 As shown, one end of the air inlet pipe 6 away from the dust dissolving tank 1 is connected to a three-way pipe 24, a first interface 25 of the three-way pipe 24 is connected to the air inlet pipe 6, and a plug valve 28 is installed on the second interface 26 and the third interface 27 of the three-way pipe 24. By setting the three-way pipe 24, the second interface 26 and the third interface 27 can be connected to the exhaust pipes of the caustic soda flake machine and the packaging machine respectively, so as to realize the simultaneous extraction of the air mixed with alkali dust in the caustic soda flake machine and the packaging machine into the dust dissolving tank 1, and then dissolving and recovering the alkali dust in the air, thereby improving the practical efficiency. A gate valve 28 is provided on each of the three interfaces 27, and the degree of opening and closing of the gate valve 28 can be controlled, thereby adjusting the extraction air volume of the alkali flake machine and the packaging machine, controlling the negative pressure inside the alkali flake machine and the packaging machine, and thereby completely extracting the air mixed with alkali dust inside the alkali flake machine and the packaging machine; when it is only necessary to extract the air mixed with alkali dust inside the alkali flake machine or the packaging machine separately, it can be connected to the second interface 26 alone, and by closing the gate valve 28 on the third interface 27, it can avoid affecting the extraction of air mixed with alkali dust inside the alkali flake machine or the packaging machine connected to the second interface 26.

[0030] See also Figure 1 As shown, an observation port connected to the interior of the dust dissolution tank 1 is provided on the side thereof, and a transparent glass 29 is fixedly provided in the observation port. By providing the observation port and the transparent glass 29, the situation inside the dust dissolution tank 1 can be directly observed, which is convenient for performing corresponding operations.

[0031] Principle of use: When the device is used to treat and recover the alkali dust mixed in the air inside the caustic soda machine and the packaging machine, valve 9 is closed, and the exhaust gas pipes of the caustic soda machine and the packaging machine are respectively connected to the second interface 26 and the third interface 27 of the tee 24. An appropriate amount of process condensate is injected into the interior of the dust dissolution tank 1 through the liquid inlet pipe 4. The air extractor 3 is turned on to extract the air mixed with alkali dust inside the caustic soda machine and the packaging machine into the interior of the dust dissolution tank 1. At the same time, the motor 10 is turned on to drive the transmission rod 12 to rotate, thereby driving the stirring rod 13 to rotate to agitate the process condensate inside the dust dissolution tank 1, ensuring that the alkali dust mixed in the air is completely dissolved in the process condensate. The treated air rises from the process condensate and is discharged under the extraction of the air extractor 3. After the recovery treatment is completed, valve 9 is opened, and the process coolant dissolved with alkali dust is discharged and recovered through the discharge pipe 8. The discharge pipe 8 can be connected to a dedicated waste water storage tank through a pipeline according to actual conditions, so as to specifically recover the process coolant dissolved with dust, thereby avoiding the need to separately treat the mixed liquid of the process condensate and alkali dust subsequently. After the discharge is completed, process condensate is injected through the liquid inlet pipe 4, passing through the conveying cavity 14, the transmission cavity 15 and the hollow pipe 16, and finally sprayed out through the spray head 17. The process condensate sprayed out by the spray head 17 has an impact force. At the same time, the motor 10 drives the transmission rod 12 to rotate, which can drive the spray head 17 to rotate. The process condensate sprayed out by the spray head 17 can wash the alkali dust adhering to the inner wall of the dust dissolution tank 1, preventing the alkali dust that has not been discharged through the discharge pipe 8 from adhering to the inner wall of the dust dissolution tank 1 and scaling, which may affect the dust dissolution tank 1, and ensuring that the alkali dust inside the dust condensation tank is fully discharged for recovery.

[0032] Although the present invention has been described herein with reference to various illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of the disclosure, the drawings, and the claims of this application, various variations and improvements can be made to the components and / or arrangements of the subject combination layout. In addition to the variations and improvements made to the components and / or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. An alkali dust recovery system for caustic soda flake production, comprising a dust dissolution tank (1), characterized in that: The top of the dust dissolution tank (1) is provided with an air outlet pipe (2) connected to the interior thereof, and the end of the air outlet pipe (2) away from the dust dissolution tank (1) is connected to an exhaust fan (3); the top of the dust dissolution tank (1) is provided with a liquid inlet pipe (4) connected to the interior thereof, and one side of the bottom of the dust dissolution tank (1) is provided with an air inlet (5) connected to the interior thereof, and the air inlet (5) is connected to an air inlet pipe (6) vertically arranged on the outside of the dust dissolution tank (1); the bottom of the dust dissolution tank (1) is provided with a discharge barrel (7) connected to the interior thereof, and one side of the bottom of the discharge barrel (7) is connected to a discharge pipe (8), and a valve (9) is provided on the discharge pipe (8).

2. The alkali dust recovery system for caustic soda flake production according to claim 1, characterized in that: A motor (10) is installed at the bottom of the discharge barrel (7), and a rotating shaft (11) of the motor (10) rotates through a through hole (21) to penetrate into the discharge barrel (7), and is transmission-connected to a transmission rod (12) vertically arranged inside the dust dissolving tank (1), and a plurality of stirring rods (13) are symmetrically distributed along the circumference of the transmission rod (12), and the stirring rods (13) are transversely arranged inside the dust dissolving tank (1).

3. The alkali dust recovery system for caustic soda flake production according to claim 2, characterized in that: A conveying chamber (14) is provided inside the transmission rod (12) along its length direction, and a transmission chamber (15) is provided inside the stirring rod (13) along its length direction. The conveying chamber (14) is connected to the transmission chamber (15). The ends of the stirring rods (13) which are opposite to each other and away from the transmission rod (12) are connected to a hollow tube (16). The hollow tube (16) is connected to the transmission chamber (15). The hollow tube (16) is vertically arranged in the dust dissolving tank (1). A plurality of water outlets are provided on the hollow tube (16) along its length direction. The water outlets are provided with injection heads (17). The injection heads (17) are arranged toward the inner wall of the dust dissolving tank (1). The conveying chamber (14) is connected to the liquid inlet pipe (4) through a rotating flange (18). The liquid inlet pipe (4) is connected to a high-pressure pump (19).

4. The alkali dust recovery system for caustic soda flake production according to claim 3, characterized in that: The top of the dust dissolution tank (1) is provided with a mounting hole (20) which is in communication with the interior thereof; the top of the rotating flange (18) is sealed in the mounting hole (20) and is in communication with the liquid inlet pipe (4); the bottom of the rotating flange (18) is placed in the dust dissolution tank (1) and is in communication with the conveying chamber (14).

5. The alkali dust recovery system for caustic soda flake production according to claim 2, characterized in that: A rotating seal ring (22) and a rotating bearing (23) are respectively arranged in the through hole (21) from top to bottom. The rotating seal ring (22) is sleeved on the outside of the rotating shaft (11); the outer ring of the rotating bearing (23) is connected to the inner wall of the through hole (21), and the inner ring of the rotating bearing (23) is connected to the outside of the rotating shaft (11).

6. The alkali dust recovery system for caustic soda flake production according to claim 1, characterized in that: One end of the air inlet pipe (6) away from the dust dissolution tank (1) is connected to a three-way pipe (24); a first interface (25) of the three-way pipe (24) is connected to the air inlet pipe (6); and a gate valve (28) is installed on the second interface (26) and the third interface (27) of the three-way pipe (24).

7. The alkali dust recovery system for caustic soda flake production according to claim 1, characterized in that: The side of the dust dissolving tank (1) is provided with an observation port connected to the interior thereof, and a transparent glass (29) is fixedly provided in the observation port.

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