Gas-liquid mixing reaction device and alkaline wastewater treatment system

Abstract

The utility model discloses a gas-liquid mixing reaction device and an alkaline wastewater treatment system, and belongs to the field of alkaline wastewater treatment.The gas-liquid mixing reaction device is characterized in that an inner ring of an annular sliding rail is slidably connected with a plurality of sliding blocks, a mixing cylinder is fixedly connected with the sliding blocks, a first rotating shaft is fixed to the left end of a motor, and a spur gear is fixed to the first rotating shaft; a gear ring is fixed to the middle of the outer side wall of the mixing barrel, a gas injection assembly is arranged on the left side of the rear side wall in the mounting frame, the gas outlet end of the gas injection assembly extends into the mixing barrel, and the first rotating shaft is in transmission connection with the gas injection assembly through a first transmission assembly; the first rotating shaft is in transmission connection with the stirring assembly through the second transmission assembly. According to the utility model, the gas is continuously injected, the pressure in the mixing cylinder is improved, the solubility of carbon dioxide in water is improved, and the mixing cylinder and the stirring component rotate, so that the carbon dioxide and the alkaline wastewater can be well mixed, the reaction efficiency is greatly improved, and the reaction effect is good.

Description

Technical Field

[0001] The utility model belongs to the field of alkaline wastewater treatment, and in particular relates to a gas-liquid mixing reaction device and an alkaline wastewater treatment system. Background Art

[0002] Alkaline wastewater treatment, especially cement wastewater treatment, is an important environmental issue. This type of wastewater usually contains high concentrations of alkaline substances, such as sodium hydroxide, calcium hydroxide, etc., as well as pollutants such as suspended solids and heavy metals. The main purpose of treating this type of wastewater is to reduce its pH value, remove suspended solids and heavy metals, and make it meet the discharge standards.

[0003] Acid-base neutralization is one of the most commonly used treatment methods. By adding acidic substances (such as sulfuric acid, hydrochloric acid, etc.) to the wastewater, the pH value of the wastewater is reduced to an appropriate range. The acidic substances added should be determined according to the composition and pH value of the wastewater to ensure that the neutralized wastewater meets the discharge standards.

[0004] The existing process of using carbon dioxide to treat alkaline wastewater, but carbon dioxide is difficult to dissolve in water, the reaction efficiency and effect are not good, and the carbon dioxide cannot be recycled, resulting in a waste of resources. Utility Model Content

[0005] The purpose of the utility model is to provide a gas-liquid mixing reaction device and an alkaline wastewater treatment system to overcome at least one of the above-mentioned defects in the prior art.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The gas-liquid mixing reaction device provided by the utility model comprises: a mounting frame, a support, an annular slide rail, a slider, a mixing barrel, a gear ring, a spur gear, a gas injection component, a stirring component, a motor, a first rotating shaft, a first bearing seat, a first transmission component, a second transmission component, a water pipe, and a first valve. The side wall of the mixing barrel is fixedly connected with a water pipe, and the water pipe is provided with a first valve. Two supports are fixed to the inner bottom wall of the mounting frame, an annular slide rail is fixed to the top of the support, and a plurality of sliders are slidably connected to the inner ring of the annular slide rail. The mixing barrel passes through the annular slide rail and is fixedly connected to the slider. The motor is fixed to the right side of the inner top wall of the mounting frame, and the left end of the motor is fixed A first rotating shaft is fixed, a spur gear is fixed on the first rotating shaft, a gear ring is fixed in the middle of the outer wall of the mixing barrel, the gear ring is meshed with the spur gear, a first bearing seat is fixed on the left side of the inner top wall of the mounting frame, the left end of the first rotating shaft passes through the first bearing seat, an injection assembly is arranged on the left side of the inner rear side wall of the mounting frame, the air outlet end of the air injection assembly extends into the mixing barrel, the first rotating shaft is connected to the air injection assembly through the first transmission assembly, a stirring assembly is arranged on the right side of the inner rear side wall of the mounting frame, the stirring end of the stirring assembly extends into the mixing barrel and is located on the right side of the air outlet end of the air injection assembly, and the first rotating shaft is connected to the stirring assembly through the second transmission assembly.

[0008] Preferably, the gas injection assembly includes a cylinder body, a piston, a first swing rod, a second swing rod, a first air inlet pipe, a second air inlet pipe, a first one-way valve, a second valve, a third air inlet pipe, a second one-way valve, a third valve, an air outlet pipe, a third one-way valve, and an atomizing nozzle. The cylinder body is fixed to the inner rear side wall of the mounting frame by a support. The interior of the cylinder body is slidably connected with the piston. The left end of the piston is hinged with the first swing rod. The left end of the first swing rod is hinged with the second swing rod. The second swing rod is transmission-connected to the first transmission assembly. The right side of the bottom wall of the cylinder body is fixedly connected to the first air inlet pipe. The left side of the lower part of the first air inlet pipe A second air inlet pipe is fixed to the wall, the first air inlet pipe is provided with a first one-way valve and a second valve, the second valve is located between the first one-way valve and the second air inlet pipe, the right side of the top wall of the cylinder body is fixedly connected to the second air inlet pipe, the second one-way valve and the third valve are arranged on the second air inlet pipe, the third valve is located above the second one-way valve, the right side wall of the cylinder body is fixedly connected to an air outlet pipe, the third one-way valve is arranged on the air outlet pipe, the right end of the air outlet pipe passes through the left side wall of the mixing cylinder, and extends to the left side of the mixing cylinder where it is fixedly connected to an atomizing nozzle, the air outlet pipe and the mixing cylinder are sealed, and the first air inlet pipe is connected to a carbon dioxide source.

[0009] Preferably, the outer jacket of the air outlet pipe located outside the mixing cylinder is provided with a cooling jacket.

[0010] Preferably, the first transmission assembly includes a first bevel gear, a second bevel gear, a second rotating shaft, a second bearing seat, a first driving wheel, a first transmission belt, a first driven wheel, a third bearing seat, and a third rotating shaft, the first bevel gear is fixed to the left end of the first rotating shaft, the second bearing seat and the third bearing seat are fixed to the left side of the inner rear side wall of the mounting frame, the third bearing seat is located below the second bearing seat, the rear end of the second rotating shaft is inserted into the second bearing seat, the second bevel gear and the first driving wheel are fixed to the front part of the second rotating shaft, the first driving wheel is located at the rear side of the second bevel gear, the second bevel gear is meshed with the first bevel gear, the rear end of the third rotating shaft is inserted into the third bearing seat, the first driven wheel is fixed to the front part of the third rotating shaft, the first driven wheel is connected to the first driving wheel through the first transmission belt, and the front end of the third rotating shaft is fixedly connected to the second swing rod.

[0011] Preferably, the stirring assembly includes a fourth bearing seat, a fourth rotating shaft, and a stirring blade. The fourth bearing seat is fixed to the right side of the inner rear side wall of the mounting frame. The fourth rotating shaft passes through the fourth bearing seat and the right side wall of the mixing barrel and extends to the mixing barrel where a plurality of stirring blades are fixed. The stirring blades are located on the right side of the atomizing nozzle, and a seal is provided between the fourth rotating shaft and the mixing barrel.

[0012] Preferably, the second transmission assembly includes a second driving wheel, a second transmission belt, and a second driven wheel. The second driving wheel is fixed to the right side of the first rotating shaft, the second driven wheel is fixed to the right end of the fourth rotating shaft, and the second driving wheel and the second driven wheel are connected by a second transmission belt.

[0013] Preferably, the plurality of stirring blades are distributed at equal intervals along the axial direction of the fourth rotating shaft.

[0014] Preferably, a scraper is fixed to the outer end of the stirring blade, and the left end of the scraper is located on the left side of the atomizing nozzle.

[0015] The utility model also provides an alkaline wastewater treatment system, comprising a carbon dioxide storage tank, a pressure release device, a circulation pump, a water collection tank, and the above-mentioned gas-liquid mixing reaction device, the gas outlet end of the carbon dioxide storage tank is connected to the gas-liquid mixing reaction device, the water outlet of the gas-liquid mixing reaction device is connected to the pressure release device through a pipeline, the exhaust port of the pressure release device is connected to the gas-liquid mixing reaction device through a second air inlet pipe, the circulation pump is arranged on the second air inlet pipe, and the water outlet end of the pressure release device is connected to the water collection tank through a pipeline.

[0016] The beneficial effects of the utility model are:

[0017] 1. Through the continuous injection of gas, the pressure in the mixing barrel is increased, the solubility of carbon dioxide in water is increased, and the rotation of the mixing barrel and the stirring assembly can well achieve the mixing of carbon dioxide and alkaline wastewater, greatly improve the reaction efficiency, and achieve good reaction effect.

[0018] 2. Only one motor is needed as the driving source to realize the stirring operation of the stirring component, the rotation of the mixing barrel, and the gas injection operation of the gas injection component. The design is ingenious and saves electricity.

[0019] 3. The two left and right annular slide rails are combined with the slider to ensure the stable rotation of the mixing drum.

[0020] 4. In the early stage of the operation, carbon dioxide is injected. When the amount of carbon dioxide injected is sufficient, it can be switched to injecting air for pressurization to reduce the use of carbon dioxide.

[0021] 5. The temperature of the gas passing through the outlet pipe can be reduced by setting the cooling jacket. At the beginning, by injecting low-temperature carbon dioxide and mixing it with alkaline wastewater, it is more conducive to the dissolution of carbon dioxide in alkaline wastewater. With the continuous injection of carbon dioxide or air, the pressure in the mixing barrel becomes higher, further improving the solubility of carbon dioxide. In the later part of the reaction, the heat generated by acid-base neutralization will be cooled by the continuously injected low-temperature gas, keeping the reaction system at a suitable reaction temperature condition.

[0022] 6. The change of rotation direction is achieved through the cooperation of the first bevel gear and the second bevel gear, and the rotation position is changed by combining the transmission belt structure. The rotation of the first rotating shaft is cleverly converted to drive the rotation of the third rotating shaft, and then the second swing arm is driven to rotate, so as to realize the gas injection operation of the gas injection assembly.

[0023] 7. The scraper is set to scrape while stirring to avoid scaling. The left end of the scraper is extended to the left side of the atomizing nozzle, which not only makes the scraping more comprehensive, but also makes up for the problem that the stirring blade cannot directly mix the gas and liquid in the atomizing nozzle section, making the overall stirring, mixing and scraping more comprehensive and thorough.

[0024] 8. Through the gas-liquid mixing reaction treatment of the gas-liquid mixing device, carbon dioxide is well soluble in alkaline solution, and through the setting of the pressure release device, the solubility of carbon dioxide in water is reduced by decompression treatment, so that carbon dioxide is released and refluxed to the gas-liquid mixing reaction device for carbon dioxide recovery and use, which saves more resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a main structural schematic diagram of the first embodiment of the utility model.

[0026] Figure 2 It is a schematic diagram of the matching structure of the gas injection component and the first transmission component in the first embodiment of the utility model.

[0027] Figure 3 It is a schematic diagram of the matching structure of the first transmission assembly and the first rotating shaft in the first embodiment of the utility model.

[0028] Figure 4 It is a schematic diagram of the internal structure of a mixing barrel in Embodiment 1 of the present utility model.

[0029] Figure 5 It is a left-side structural schematic diagram of an annular slide rail and a sliding block in Embodiment 1 of the utility model.

[0030] Figure 6 It is a schematic diagram of the matching structure of the second transmission assembly, the first rotating shaft, and the fourth rotating shaft in the first embodiment of the utility model.

[0031] Figure 7 It is a system block diagram of the second embodiment of the present utility model.

[0032] The marks in the accompanying drawings are: 1-mounting frame, 2-support, 3-annular slide rail, 4-slider, 5-mixing barrel, 6-first transmission assembly, 7-second transmission assembly, 8-gas injection assembly, 9-stirring assembly, 10-gear ring, 11-spur gear, 12-motor, 13-first rotating shaft, 14-first bearing seat, 15-water pipe, 16-first valve, 81-cylinder body, 82-piston, 83-first swing rod, 84-second swing rod, 85-first air inlet pipe, 86-second air inlet pipe, 87-first one-way valve, 88-second valve, 89-third air inlet pipe, 810-second one-way valve, 811-third valve, 812-piston, 813-first one-way valve, 814-second one-way valve, 815-first one-way valve, 816-second one-way valve, 817-first one-way valve, 818-second one-way valve, 819-third one-way valve, 820-second one-way valve, 821-second one-way valve, 822-piston, 823-first one-way valve, 824-second one-way valve, 825-first one-way valve, 826-second one-way valve, 827-first one-way valve, 828-second one-way valve, 829-third one-way valve, 830-second one-way valve, 831-second one-way valve, 832-second one-way valve, 833-first one-way valve, 834-second one-way valve, 835-first one-way valve, 836-second one-way valve, 837-first one-way valve, 838-second one- 2-air outlet pipe, 813-third one-way valve, 814-atomizing nozzle, 815-cooling jacket, 61-first bevel gear, 62-second bevel gear, 63-second rotating shaft, 64-second bearing seat, 65-first driving wheel, 66-first transmission belt, 67-first driven wheel, 68-third bearing seat, 69-third rotating shaft, 91-fourth bearing seat, 92-fourth rotating shaft, 93-stirring blade, 71-second driving wheel, 72-second transmission belt, 73-second driven wheel, 94-scraper, 17-carbon dioxide storage tank, 18-pressure release device, 19-circulating pump, 20-water collecting tank, 21-gas-liquid mixing reaction device. DETAILED DESCRIPTION

[0033] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0034] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] Embodiment 1:

[0036] like Figures 1 to 6 As shown, the gas-liquid mixing reaction device provided in this embodiment includes: a mounting frame 1, a support 2, an annular slide rail 3, a slider 4, a mixing barrel 5, a gear ring 10, a spur gear 11, a gas injection assembly 8, a stirring assembly 9, a motor 12, a first rotating shaft 13, a first bearing seat 14, a first transmission assembly 6, a second transmission assembly 7, a water pipe 15, and a first valve 16. The side wall of the mixing barrel 5 is fixedly connected with the water pipe 15, and the water pipe 15 is provided with a first valve 16. Two supports 2 are fixed to the inner bottom wall of the mounting frame 1, and an annular slide rail 3 is fixed to the top of the support 2. A plurality of sliders 4 are slidably connected to the inner ring of the annular slide rail 3. The mixing barrel 5 passes through the annular slide rail 3 and is fixedly connected to the slider 4. The motor 12 is fixed to the right side of the inner top wall of the mounting frame 1. The motor 12 A first rotating shaft 13 is fixed to the left end of the mounting frame 1, and a spur gear 11 is fixed to the first rotating shaft 13. A gear ring 10 is fixed to the middle part of the outer wall of the mixing barrel 5, and the gear ring 10 is meshed with the spur gear 11. A first bearing seat 14 is fixed to the left side of the inner top wall of the mounting frame 1, and the left end of the first rotating shaft 13 passes through the first bearing seat 14. An injection assembly 8 is arranged on the left side of the inner rear side wall of the mounting frame 1, and the air outlet end of the air injection assembly 8 extends into the mixing barrel 5. The first rotating shaft 13 is connected to the air injection assembly 8 through the first transmission assembly 6. A stirring assembly 9 is arranged on the right side of the inner rear side wall of the mounting frame 1, and the stirring end of the stirring assembly 9 extends into the mixing barrel 5 and is located on the right side of the air outlet end of the air injection assembly 8. The first rotating shaft 13 is connected to the stirring assembly 9 through the second transmission assembly 7.

[0037] During operation, the first valve 16 is opened, and the alkaline wastewater enters the mixing barrel 5 from the water pipe 15. The motor 12 is started to drive the first rotating shaft 13 to rotate, so that the spur gear 11 rotates, drives the ring gear 10 to rotate, and then drives the mixing barrel 5 to rotate. At the same time, the first rotating shaft 13 rotates and drives the stirring assembly 9 to perform stirring operation through the second transmission assembly 7. Through the cooperation of the mixing barrel 5 and the stirring assembly 9, a good stirring and mixing process is achieved. The first rotating shaft 13 rotates and drives the gas injection assembly 8 to operate through the first transmission assembly 6, and injects carbon dioxide into the mixing barrel 5 to mix with the alkaline wastewater. Through the continuous injection of gas, the pressure in the mixing barrel 5 is increased, and the solubility of carbon dioxide in water is increased. Combined with the rotation of the mixing barrel 5 and the stirring assembly 9, the mixing of carbon dioxide and alkaline wastewater can be well achieved, the reaction efficiency is greatly improved, and the reaction effect is good. And only one motor 12 is needed as a driving source to realize the stirring operation of the stirring assembly 9, the rotation of the mixing barrel 5, and the gas injection operation of the gas injection assembly 8, which is cleverly designed and saves electricity. The stable rotation of the mixing barrel 5 is guaranteed by the setting of the left and right two annular slide rails 3 combined with the slider 4.

[0038] The gas injection assembly 8 includes a cylinder body 81, a piston 82, a first swing rod 83, a second swing rod 84, a first air inlet pipe 85, a second air inlet pipe 86, a first one-way valve 87, a second valve 88, a third air inlet pipe 89, a second one-way valve 810, a third valve 811, an air outlet pipe 812, a third one-way valve 813, and an atomizing nozzle 814. The cylinder body 81 is fixed to the inner rear side wall of the mounting frame 1 through a support. The piston 82 is slidably connected to the inside of the cylinder body 81. The left end of the piston 82 is hinged with the first swing rod 83. The left end of the first swing rod 83 is hinged with the second swing rod 84. The second swing rod 84 is transmission-connected to the first transmission assembly 6. The right side of the bottom wall of the cylinder body 81 is fixedly connected with the first air inlet pipe 85. The left side wall of the lower part of the first air inlet pipe 85 is fixed with the second air inlet pipe 86, the first air inlet pipe 85 is provided with a first one-way valve 87 and a second valve 88, the second valve 88 is located between the first one-way valve 87 and the second air inlet pipe 86, the right side of the top wall of the cylinder body 81 is fixedly connected to the second air inlet pipe 86, the second one-way valve 810 and the third valve 811 are arranged on the second air inlet pipe 86, the third valve 811 is located above the second one-way valve 810, the right side wall of the cylinder body 81 is fixedly connected to an air outlet pipe 812, the third one-way valve 813 is arranged on the air outlet pipe 812, the right end of the air outlet pipe 812 passes through the left side wall of the mixing barrel 5, and extends to the left side of the mixing barrel 5 and is fixedly connected to an atomizing nozzle 814, the air outlet pipe 812 and the mixing barrel 5 are sealed, the first air inlet pipe 85 is connected to the carbon dioxide source, and the second air inlet pipe 86 is connected to the exhaust port of the pressure release device 18.

[0039] The first transmission assembly 6 drives the second swing rod 84 to rotate, so that the first swing rod 83 rotates, and the piston 82 is repeatedly pushed left and right. When the piston 82 moves to the right, the gas in the cylinder 81 is pushed to the outlet pipe 812, and sprayed out through the atomizing nozzle 814. Combined with the rotating mixing barrel 5, the atomized carbon dioxide can be better mixed with the alkaline wastewater in the mixing barrel 5, further improving the mixing efficiency. When carbon dioxide needs to be injected, the second valve 88 is opened, the third valve 811 is closed, and the piston 82 moves to the left, and the carbon dioxide in the carbon dioxide storage tank 17 is sucked into the cylinder 81 through the first air inlet pipe 85; when carbon dioxide does not need to be injected, the second valve 88 is closed, the third valve 811 is opened, and the piston 82 moves to the left, and air is sucked into the cylinder 81 through the second air inlet pipe 86. Then the piston 82 is pushed to the right, so that carbon dioxide or air is injected into the mixing barrel 5. The first one-way valve 87 allows carbon dioxide to enter the cylinder 81 only from the first air inlet pipe 85, and does not allow the gas in the cylinder 81 to be discharged through the first air inlet pipe 85. The second one-way valve 810 is set so that air can only enter the cylinder body 81 from the second air inlet pipe 86, and the gas in the cylinder body 81 will not be discharged through the second air inlet pipe 86. The third one-way valve 813 is set so that the gas in the cylinder body 81 can only be discharged from the air outlet pipe 812, and will not flow back into the cylinder body 81 through the air outlet pipe 812. The first one-way valve 87, the second one-way valve 810, and the third one-way valve 813 are set to ensure normal gas injection operation. In this way, by continuously injecting carbon dioxide or air into the mixing barrel 5, the mixing barrel 5 is pressurized to increase the solubility of carbon dioxide in water. In the early stage of the operation, carbon dioxide is injected. When the amount of carbon dioxide injected is sufficient, it can be switched to injecting air for pressurization to reduce the use of carbon dioxide.

[0040] Among them, the outlet pipe 812 located outside the mixing barrel 5 is provided with a cooling jacket 815. The solubility of carbon dioxide in water is not only affected by pressure, but also by temperature. The higher the pressure and the lower the temperature, the higher the solubility of carbon dioxide in water. The acid-base neutralization reaction will increase the temperature in the mixing barrel 5. By setting the cooling jacket 815, the temperature of the gas passing through the outlet pipe 812 can be reduced. At the beginning, by injecting low-temperature carbon dioxide and mixing with alkaline wastewater, it is more conducive to the dissolution of carbon dioxide in alkaline wastewater. With the continuous injection of carbon dioxide or air, the pressure in the mixing barrel 5 becomes higher, further improving the solubility of carbon dioxide. In the post-reaction part, the heat generated by acid-base neutralization will be cooled by the continuously injected low-temperature gas, keeping the reaction system at a suitable reaction temperature condition.

[0041] The first transmission assembly 6 includes a first bevel gear 61, a second bevel gear 62, a second rotating shaft 63, a second bearing seat 64, a first driving wheel 65, a first transmission belt 66, a first driven wheel 67, a third bearing seat 68, and a third rotating shaft 69. The first bevel gear 61 is fixed to the left end of the first rotating shaft 13, and the second bearing seat 64 and the third bearing seat 68 are fixed to the left side of the inner rear side wall of the mounting frame 1. The third bearing seat 68 is located below the second bearing seat 64, and the rear end of the second rotating shaft 63 is inserted into the The second rotating shaft 63 is inserted into the second bearing seat 64, the second bevel gear 62 and the first driving wheel 65 are fixed to the front of the second rotating shaft 63, the first driving wheel 65 is located at the rear side of the second bevel gear 62, the second bevel gear 62 is meshed with the first bevel gear 61, the rear end of the third rotating shaft 69 is inserted into the third bearing seat 68, the front of the third rotating shaft 69 is fixed with the first driven wheel 67, the first driven wheel 67 is connected to the first driving wheel 65 through the first transmission belt 66, and the front end of the third rotating shaft 69 is fixedly connected to the second swinging rod 84. The first rotating shaft 13 rotates, driving the first bevel gear 61 to rotate, so that the second bevel gear 62 rotates, driving the second rotating shaft 63 to rotate, and then driving the first driving wheel 65 to rotate, driving the first driven wheel 67 to rotate through the first transmission belt 66, so that the third rotating shaft 69 rotates, and driving the second swinging rod 84 to rotate. In this way, the change of rotation direction is achieved through the cooperation of the first bevel gear 61 and the second bevel gear 62, and then the rotation position is changed in combination with the transmission belt structure, so that the rotation of the first rotating shaft 13 is cleverly converted to drive the rotation of the third rotating shaft 69, and then drive the second swing rod 84 to rotate, so as to realize the gas injection operation of the gas injection assembly 8.

[0042] The stirring assembly 9 includes a fourth bearing seat 91, a fourth rotating shaft 92, and a stirring blade 93. The fourth bearing seat 91 is fixed to the right side of the rear side wall of the mounting frame 1. The fourth rotating shaft 92 passes through the fourth bearing seat 91 and the right side wall of the mixing barrel 5, and extends to the mixing barrel 5 where a plurality of stirring blades 93 are fixed. The stirring blades 93 are located on the right side of the atomizing nozzle 814, and a seal is set between the fourth rotating shaft 92 and the mixing barrel 5. The second transmission assembly 7 drives the fourth rotating shaft 92 to rotate, so that the stirring blade 93 rotates, and the gas and liquid in the mixing barrel 5 are stirred by the stirring blade 93, so that the mixing is more efficient.

[0043] The second transmission assembly 7 includes a second driving wheel 71, a second transmission belt 72, and a second driven wheel 73. The second driving wheel 71 is fixed to the right side of the first rotating shaft 13, and the second driven wheel 73 is fixed to the right end of the fourth rotating shaft 92. The second driving wheel 71 and the second driven wheel 73 are connected by the second transmission belt 72. The first rotating shaft 13 rotates, driving the second driving wheel 71 to rotate, and the second driven wheel 73 is driven to rotate by the second transmission belt 72, so that the fourth rotating shaft 92 rotates.

[0044] The plurality of stirring blades 93 are evenly spaced and distributed along the axial direction of the fourth rotating shaft 92. The stirring blades 93 are arranged in this way, so that the distribution is more comprehensive and the stirring and mixing is more comprehensive and thorough.

[0045] Among them, a scraper 94 is fixed to the outer end of the stirring blade 93, and the left end of the scraper 94 is located on the left side of the atomizing nozzle 814. The scraper 94 is set to perform scraping operations while stirring operations to avoid scaling. And the setting that the left end of the scraper 94 extends to the left side of the atomizing nozzle 814 not only makes the scraping more comprehensive, but also makes up for the problem that the stirring blade 93 cannot directly mix the gas and liquid in the atomizing nozzle 814 section, making the overall stirring, mixing and scraping more comprehensive and thorough.

[0046] This embodiment provides a method for treating alkaline wastewater, comprising the following steps:

[0047] The carbon dioxide and alkaline wastewater are respectively sent to the gas-liquid mixed reaction device 21 for gas-liquid mixed reaction treatment, so that the carbon dioxide is dissolved in the alkaline wastewater, and an acid-base neutralization reaction is carried out. The treated water enters the pressure release device 18 for decompression treatment, so that the carbon dioxide in the water is released and refluxed into the gas-liquid mixed reaction device 21. After decompression, the water enters the water collection tank 20 for collection. Through the gas-liquid mixed reaction treatment of the gas-liquid mixing device, the carbon dioxide is well dissolved in the alkaline solution, and through the setting of the pressure release device 18, the solubility of carbon dioxide in water is reduced by decompression treatment, so that the carbon dioxide is released and refluxed to the gas-liquid mixed reaction device 21 for recycling and use of carbon dioxide, which saves more resources.

[0048] Embodiment 2:

[0049] like Figure 7As shown, this embodiment provides an alkaline wastewater treatment system, including a carbon dioxide storage tank 17, a pressure release device 18, a circulation pump 19, a water collection tank 20, and a gas-liquid mixed reaction device 21 of the first embodiment, the gas outlet end of the carbon dioxide storage tank 17 is connected to the gas-liquid mixed reaction device 21, the water outlet of the gas-liquid mixed reaction device 21 is connected to the pressure release device 18 through a pipeline, the exhaust port of the pressure release device 18 is connected to the gas-liquid mixed reaction device 21 through a second air inlet pipe 86, the circulation pump 19 is arranged on the second air inlet pipe 86, and the water outlet end of the pressure release device 18 is connected to the water collection tank 20 through a pipeline. The carbon dioxide in the carbon dioxide storage tank 17 enters the cylinder body 81 through the first air inlet pipe 85, enters the mixing barrel 5 through the air outlet pipe 812 for gas-liquid mixed reaction treatment, and the alkaline wastewater enters the mixing barrel 5 through the water pipe 15 for gas-liquid mixed reaction treatment. After the reaction is completed, the water enters the pressure releaser 18 for pressure reduction treatment, so that the carbon dioxide dissolved in the water is released, and flows back to the cylinder 81 through the second air inlet pipe 86 via the circulation pump 19, and the carbon dioxide is recycled and used. The water after the carbon dioxide is released enters the water collection tank 20 for collection. At the beginning of the operation, the water pipe 15 is located at the top, and after the operation is completed, the water pipe 15 is located at the bottom, and the pipeline connected to the pressure releaser 18 is connected to the water pipe 15, and the first valve 16 is opened to allow the water in the mixing cylinder 5 to enter the pressure releaser 18.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas-liquid mixing reaction device, characterized in that: include: A mounting frame, a support, an annular slide rail, a slider, a mixing barrel, a gear ring, a spur gear, an air injection assembly, a stirring assembly, a motor, a first rotating shaft, a first bearing seat, a first transmission assembly, a second transmission assembly, a water pipe, and a first valve; The side wall of the mixing cylinder is fixedly connected with a water pipe, and the water pipe is provided with a first valve; Two supports are fixed on the inner bottom wall of the mounting frame, an annular slide rail is fixed on the top of the support, a plurality of sliders are slidably connected to the inner ring of the annular slide rail, and the mixing cylinder passes through the annular slide rail and is fixedly connected to the sliders; A motor is fixed to the right side of the top wall of the mounting frame, a first rotating shaft is fixed to the left end of the motor, the spur gear is fixed to the first rotating shaft, a gear ring is fixed to the middle part of the outer wall of the mixing cylinder, and the gear ring is meshed with the spur gear; A first bearing seat is fixed on the left side of the inner top wall of the mounting frame, and the left end of the first rotating shaft passes through the first bearing seat; An air injection assembly is arranged on the left side of the rear side wall of the mounting frame, the air outlet end of the air injection assembly extends into the mixing barrel, and the first rotating shaft is transmission-connected to the air injection assembly through a first transmission assembly; A stirring assembly is arranged on the right side of the rear side wall inside the mounting frame, the stirring end of the stirring assembly extends into the mixing barrel and is located on the right side of the air outlet end of the air injection assembly, and the first rotating shaft is connected to the stirring assembly through the second transmission assembly.

2. The gas-liquid mixing reaction device according to claim 1, characterized in that: The gas injection assembly includes a cylinder body, a piston, a first swing rod, a second swing rod, a first air inlet pipe, a second air inlet pipe, a first one-way valve, a second valve, a third air inlet pipe, a second one-way valve, a third valve, an air outlet pipe, a third one-way valve, and an atomizing nozzle; The cylinder body is fixed to the inner rear side wall of the mounting frame through a support, a piston is slidably connected inside the cylinder body, a first swinging rod is hingedly connected to the left end of the piston, a second swinging rod is hingedly connected to the left end of the first swinging rod, and the second swinging rod is transmission-connected to the first transmission assembly; The right side of the bottom wall of the cylinder body is fixedly connected with a first air intake pipe, the left side wall below the first air intake pipe is fixed with a second air intake pipe, the first air intake pipe is provided with a first one-way valve and a second valve, and the second valve is located between the first one-way valve and the second air intake pipe; The right side of the top wall of the cylinder body is fixedly connected to the second air intake pipe, the second one-way valve and the third valve are arranged on the second air intake pipe, and the third valve is located above the second one-way valve; The right side wall of the cylinder body is fixedly connected with an air outlet pipe, the third one-way valve is arranged on the air outlet pipe, the right end of the air outlet pipe passes through the left side wall of the mixing cylinder, and extends to the left side of the mixing cylinder where an atomizing nozzle is fixedly connected, and a sealing arrangement is arranged between the air outlet pipe and the mixing cylinder; The first air inlet pipe is in communication with a carbon dioxide source.

3. The gas-liquid mixing reaction device according to claim 2, characterized in that: The outer sleeve of the air outlet pipe located outside the mixing cylinder is provided with a cooling jacket.

4. The gas-liquid mixing reaction device according to claim 2, characterized in that: The first transmission assembly includes a first bevel gear, a second bevel gear, a second rotating shaft, a second bearing seat, a first driving wheel, a first transmission belt, a first driven wheel, a third bearing seat, and a third rotating shaft; A first bevel gear is fixed to the left end of the first rotating shaft, a second bearing seat and a third bearing seat are fixed to the left side of the inner rear side wall of the mounting frame, the third bearing seat is located below the second bearing seat, the rear end of the second rotating shaft is inserted into the second bearing seat, a second bevel gear and a first driving wheel are fixed to the front part of the second rotating shaft, the first driving wheel is located at the rear side of the second bevel gear, and the second bevel gear is meshed with the first bevel gear; The rear end of the third rotating shaft is inserted into the third bearing seat, the front part of the third rotating shaft is fixed with a first driven wheel, and the first driven wheel is connected to the first driving wheel through a first transmission belt; The front end of the third rotating shaft is fixedly connected to the second swing rod.

5. The gas-liquid mixing reaction device according to claim 2, characterized in that: The stirring assembly includes a fourth bearing seat, a fourth rotating shaft, and a stirring blade; The fourth bearing seat is fixed to the right side of the rear side wall inside the mounting frame, the fourth rotating shaft passes through the fourth bearing seat and the right side wall of the mixing barrel, and extends to the mixing barrel where a plurality of stirring blades are fixed. The stirring blades are located on the right side of the atomizing nozzle, and a seal is arranged between the fourth rotating shaft and the mixing barrel.

6. The gas-liquid mixing reaction device according to claim 5, characterized in that: The second transmission assembly includes a second driving wheel, a second transmission belt, and a second driven wheel; The second driving wheel is fixed to the right side of the first rotating shaft, the second driven wheel is fixed to the right end of the fourth rotating shaft, and the second driving wheel and the second driven wheel are connected by a second transmission belt.

7. The gas-liquid mixing reaction device according to claim 5, characterized in that: The plurality of stirring blades are distributed at equal intervals along the axial direction of the fourth rotating shaft.

8. The gas-liquid mixing reaction device according to claim 7, characterized in that: A scraper is fixed to the outer end of the stirring blade, and the left end of the scraper is located on the left side of the atomizing nozzle.

9. Alkaline wastewater treatment system, characterized by: It comprises a carbon dioxide storage tank, a pressure releaser, a circulation pump, a water collection tank, and a gas-liquid mixing reaction device according to any one of claims 1 to 8; The gas outlet end of the carbon dioxide storage tank is connected to the gas-liquid mixing reaction device, the water outlet of the gas-liquid mixing reaction device is connected to the pressure releaser through a pipeline, the exhaust port of the pressure releaser is connected to the gas-liquid mixing reaction device through a second air inlet pipe, the circulation pump is arranged on the second air inlet pipe, and the water outlet end of the pressure releaser is connected to the water collecting tank through a pipeline.

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