Gas-liquid mixing and adding device and alkaline wastewater treatment system

Abstract

The utility model discloses a gas-liquid mixing feeding device and an alkaline wastewater treatment system, which belong to the field of wastewater treatment, and comprise a Venturi tube, a first one-way valve, a cylinder body, a piston, a connecting rod, a first oscillating rod, a second oscillating rod, a motor, a first rotating shaft, a first feeding tube, a second feeding tube, a second one-way valve and a third one-way valve, the venturi tube comprises a contraction section, a throat tube section and a diffusion section which are sequentially arranged from left to right, the diffusion section of the venturi tube is fixedly communicated with a cylinder body, and the diffusion section is provided with a first one-way valve. According to the device, carbon dioxide can be well dissolved in alkaline wastewater through premixing and pressurizing treatment, the reaction efficiency and effect are good, and the carbon dioxide is recycled through decompression treatment after treatment is finished.

Description

Technical Field

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

[0002] In the field of alkaline wastewater treatment, acidic substances need to be added to the alkaline wastewater for neutralization. When hydrochloric acid is used for neutralization, a large amount of chloride ions will be introduced, causing the chloride ion content of the wastewater to exceed the standard. When concentrated sulfuric acid is used, the reaction will produce a large amount of volatile hydrochloric acid, causing serious environmental pollution. Therefore, the use of carbonic acid, which does not produce additional pollutants, is the best choice.

[0003] Engineering mud includes construction mud, etc. At present, engineering mud is mainly treated by mud dehydration and consolidation. The mud dehydration and consolidation process requires the addition of a large amount of lime, resulting in a large amount of alkaline substance Ca(OH)2 in the process tail water. If the strong alkaline tail water is directly discharged without treatment, it will cause environmental pollution. Carbon dioxide gas and strong alkaline tail water and technology have achieved good results in engineering applications.

[0004] However, the existing method of mixing carbon dioxide and wastewater cannot achieve good dissolution of carbon dioxide in alkaline wastewater, 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 dosing 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 utility model provides a gas-liquid mixing and adding device, comprising a venturi tube, a first one-way valve, a cylinder body, a piston, a connecting rod, a first swinging rod, a second swinging rod, a motor, a first rotating shaft, a first adding tube, a second adding tube, a second one-way valve, and a third one-way valve. The venturi tube comprises a contraction section, a throat section, and a diffusion section which are arranged in sequence from left to right. Alkaline waste liquid enters the venturi tube through the contraction section of the venturi tube, and normal temperature carbon dioxide enters the venturi tube through the throat section of the venturi tube. The diffusion section of the venturi tube is fixedly connected with the cylinder body, the diffusion section is provided with a first one-way valve, and the cylinder body is provided with a first one-way valve. A piston is slidably connected to the body, a connecting rod is fixed to the right end of the piston, a motor is arranged on the right side of the cylinder body, a first rotating shaft is fixed to the front end of the motor, a first swinging rod is fixed to the first rotating shaft, a second swinging rod is hinged to the outer end of the first swinging rod, and the left end of the second swinging rod is hinged to the connecting rod, a first dosing pipe is fixedly connected to the upper side wall on the left side of the cylinder body, a second one-way valve is arranged on the first dosing pipe, a second dosing pipe is fixedly connected to the lower side wall on the left side of the cylinder body, a third one-way valve is arranged on the second dosing pipe, and the discharge end of the first dosing pipe and the discharge end of the second dosing pipe both extend to the top of the interior of the reactor.

[0008] Preferably, the discharge end of the first dosing pipe and the discharge end of the second dosing pipe are both connected to the first atomizing nozzles at an upward tilt, and the two first atomizing nozzles are arranged opposite to each other on the left and right.

[0009] Preferably, the inclination angles of the discharge end of the first dosing pipe and the discharge end of the second dosing pipe are both 30-60°.

[0010] Preferably, an impeller is provided in the diffuser section, and the impeller is located between the first one-way valve and the throat section.

[0011] The utility model also provides an alkaline wastewater treatment system, comprising the above-mentioned gas-liquid mixing dosing device, a frame, a carbon dioxide storage tank, a first delivery pipe, a first regulating valve, a second delivery pipe, a second regulating valve, a reactor, a filter, a pressure release device, a water collection tank, a third delivery pipe, and a fourth one-way valve. The gas-liquid mixing dosing device, the carbon dioxide storage tank, the reactor, the filter, the pressure release device, and the water collection tank are all arranged on the frame, the carbon dioxide storage tank is located above the venturi tube, the bottom of the carbon dioxide storage tank is fixedly connected with the first delivery pipe, the bottom end of the first delivery pipe is fixedly connected with the top of the throat section, the first delivery pipe is provided with a first regulating valve, the upper part of the first delivery pipe is fixedly connected with the second delivery pipe, the first delivery pipe is provided with a second regulating valve, the discharge end of the second delivery pipe passes through the top wall of the reactor and extends to the upper part of the reactor, the water outlet of the reactor is connected with the filter, the water outlet of the filter is connected with the pressure release device, the water outlet of the pressure release device is connected with the water collection tank, the exhaust port of the pressure release device is fixedly connected with the bottom of the throat section through the third delivery pipe, and the third delivery pipe is provided with a fourth one-way valve.

[0012] Preferably, the second delivery pipe is outer-mounted with a cooling jacket, and the bottom of the discharge end of the second delivery pipe is fixedly connected with a second atomizing nozzle, and the second atomizing nozzle is located at the center of the upper part of the reactor.

[0013] Preferably, it further comprises a transmission assembly and a stirring assembly. The stirring assembly is disposed at the lower part of the reactor, and the stirring assembly is rotationally connected to the first rotating shaft through the transmission assembly.

[0014] Preferably, the stirring assembly includes a bearing seat, a second rotating shaft, and stirring blades. The bearing seat is fixed below the front side wall of the reactor. The rear of the second rotating shaft passes through the bearing seat and the front side wall of the reactor and extends to the interior of the reactor where a plurality of stirring blades are fixed.

[0015] Preferably, the transmission assembly includes a driving wheel, a driven wheel, and a transmission belt. The driving wheel is fixed to the front end of the first rotating shaft, the driven wheel is fixed to the front end of the second rotating shaft, and the driving wheel and the driven wheel are connected by a transmission belt.

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

[0017] 1. Through the pre-mixing and pressurization treatment of the gas-liquid mixing dosing device, carbon dioxide can be well dissolved in alkaline wastewater, with good reaction efficiency and effect. After the treatment, the pressure is reduced by the pressure release device to recycle the carbon dioxide and avoid waste of resources.

[0018] 2. The gas-liquid mixture is sprayed from the left and right sides above the reactor and collides above the reactor. The collision allows the carbon dioxide and alkaline wastewater in the gas-liquid mixture to be better mixed and dispersed, increasing the contact area between them, which is beneficial to the mass transfer and reaction process.

[0019] 3. Through the setting of the first atomizing nozzle, the premixed gas-liquid mixture is atomized and sprayed, and then collides to further break it into smaller droplets, thereby increasing the surface area of ​​the alkaline wastewater and the contact area with carbon dioxide. The atomized droplets and carbon dioxide will interact strongly during the collision process, allowing carbon dioxide to fully penetrate into the droplets.

[0020] 4. By setting the tilt angle, the gas-liquid mixture can collide better.

[0021] 5. By setting an impeller in the diffusion section, when the gas-liquid mixture pre-mixed through the throat section passes through the impeller, it will drive the impeller to rotate, and the rotating impeller will further stir and mix the gas-liquid mixture, making the mixing effect better and increasing the contact area between them.

[0022] 6. Divide the carbon dioxide into two paths, one path is pre-mixed with the alkaline wastewater, and the other path is directly sent into the reactor to collide and mix with the pre-mixed gas-liquid mixture. Both paths can play a pressurizing role and can achieve a good gas-liquid mixing effect.

[0023] 7. By providing a cooling jacket on the outer shell of the second delivery pipe, the temperature of the carbon dioxide delivered through the second delivery pipe is reduced, thereby further improving the solubility of carbon dioxide, improving the reaction efficiency, and reducing the pressure requirement.

[0024] 8. The dripping and collected gas-liquid mixture is stirred and mixed on a large scale and in a more comprehensive manner by stirring, which greatly improves the reaction efficiency. No additional power source is required. Only one motor is needed to convey the pressurized gas-liquid mixture and stir and mix the gas-liquid mixture. The combination of the two is an ingenious design. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system block diagram of the utility model.

[0026] Figure 2 It is a schematic diagram of the main structure of the gas-liquid mixing dosing device of the utility model.

[0027] Figure 3 It is a main structural schematic diagram of the alkaline wastewater treatment system of the utility model.

[0028] Figure 4 It is a partial main structural schematic diagram of the utility model.

[0029] The markings in the attached drawings are: 1-first one-way valve, 2-cylinder body, 3-Venturi tube, 4-piston, 5-connecting rod, 6-first swing rod, 7-second swing rod, 8-motor, 9-first rotating shaft, 10-first dosing pipe, 11-second dosing pipe, 12-second one-way valve, 13-third one-way valve, 31-contraction section, 32-throat section, 33-diffusion section, 14-first atomizing nozzle, 15-impeller, 16-frame, 17-carbon dioxide storage tank, 18-first Delivery pipe, 19-first regulating valve, 20-second delivery pipe, 21-second regulating valve, 22-reactor, 23-filter, 24-pressure releaser, 25-water collecting tank, 26-third delivery pipe, 27-fourth one-way valve, 28-cooling jacket, 29-transmission assembly, 30-stirring assembly, 301-bearing seat, 302-second rotating shaft, 303-stirring blade, 291-driving wheel, 292-driven wheel, 293-transmission belt, 31-second atomizing nozzle. DETAILED DESCRIPTION

[0030] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0031] 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.

[0032] Embodiment 1:

[0033] like Figure 1 As shown, a method for treating alkaline wastewater provided in this embodiment comprises the following steps:

[0034] Alkaline waste liquid and room temperature carbon dioxide are added to the gas-liquid mixing and adding device from the two inlets of the gas-liquid mixing and adding device respectively, the alkaline waste liquid and carbon dioxide are mixed and pressurized by the gas-liquid mixing and adding device, and then sent to the reactor 22 for reaction, the reaction pressure is 0.4-0.6Mpa, and the carbon dioxide at a temperature of 5-10°C is sent to the reactor 22 at the same time. The water outlet of the reactor 22 enters the filter for filtration treatment, and the water outlet of the filter 23 enters the pressure releaser 24 for decompression treatment, so that the carbon dioxide in the water is released and refluxes to the gas-liquid mixing and adding device to continue mixing with the alkaline waste liquid. The filtered water after decompression enters the water collecting tank 25 for collection.

[0035] Alkaline waste liquid and normal temperature carbon dioxide are premixed by venturi tube 3, and are continuously fed into reactor 22 after pressurization. Combined with the continuously input low temperature carbon dioxide, it not only collides with premixed waste water, improves gas-liquid mixing degree, but also reduces the temperature in reactor 22. Combined with the continuously input mixed waste water and low temperature carbon dioxide, the pressure in reactor 22 is increased. Under low temperature and high pressure environment, the solubility of carbon dioxide in water is increased. When the reaction pressure reaches 0.6Mpa and the reaction temperature is 10°C, the solubility of carbon dioxide in water is 6.75g / L. This enables carbon dioxide to be well neutralized with alkaline substances in alkaline waste water, with high treatment efficiency and good treatment effect. And through the setting of pressure release device 24, the water pressure is reduced. Due to the pressure reduction, the solubility of carbon dioxide in water is reduced, so that carbon dioxide in water is released, and then refluxed to the gas-liquid mixing dosing device for recycling, and carbon dioxide is recycled, resulting in waste of resources, and will not cause transitional emission of carbon dioxide, protecting the environment.

[0036] Embodiment 2:

[0037] like Figure 2 As shown, this embodiment provides a gas-liquid mixing dosing device, which is used for gas-liquid mixing dosing treatment in an alkaline wastewater treatment method of embodiment 1, comprising:

[0038] Venturi tube 3, first one-way valve 1, cylinder body 2, piston 4, connecting rod 5, first swing arm 6, second swing arm 7, motor 8, first rotating shaft 9, first dosing pipe 10, second dosing pipe 11, second one-way valve 12, and third one-way valve 13.

[0039] The venturi tube 3 includes a contraction section 31, a throat section 32, and a diffusion section 33, which are arranged in sequence from left to right. Alkaline waste liquid enters the venturi tube 3 through the contraction section 31 of the venturi tube 3, and normal temperature carbon dioxide enters the venturi tube 3 through the throat section 32 of the venturi tube 3. The diffusion section 33 of the venturi tube 3 is fixedly connected with the cylinder body 2, and the diffusion section 33 is provided with a first one-way valve 1. The cylinder body 2 is slidably connected with a piston 4, and a connecting rod 5 is fixed to the right end of the piston 4. A motor 8 is arranged on the right side of the cylinder body 2, and a first rotating shaft 9 is fixed to the front end of the motor 8, and a first swinging rod 6 is fixed to the first rotating shaft 9. The outer end of the first swing rod 6 is hinged with the second swing rod 7, and the left end of the second swing rod 7 is hinged with the connecting rod 5. The upper side wall on the left side of the cylinder body 2 is fixedly connected with a first dosing pipe 10, and the first dosing pipe 10 is provided with a second one-way valve 12. The lower side wall on the left side of the cylinder body 2 is fixedly connected with a second dosing pipe 11, and the second dosing pipe 11 is provided with a third one-way valve 13. The discharge ends of the first dosing pipe 10 and the second dosing pipe 11 both extend to the top of the interior of the reactor 22.

[0040] The alkaline waste liquid and the carbon dioxide at room temperature are quickly mixed and collided in the throat section 32, promoting the full mixing of carbon dioxide and alkaline waste liquid, making the reaction more uniform and rapid, and achieving a good premixing effect. Then, it enters the cylinder body 2 through the diffusion section 33, and the motor 8 rotates, driving the first rotating shaft 9 to rotate, so that the first swing rod 6 rotates, driving the second swing rod 7 to rotate, and then driving the connecting rod 5 to move left and right, pushing the piston 4 to move left and right, repeatedly pumping the gas-liquid mixture of the diffusion section 33 into the cylinder body 2, and then sending it to the first dosing pipe 10 and the second dosing pipe 11, respectively spraying from the left and right sides above the inside of the reactor 22, spraying the gas-liquid mixture, and colliding with each other above the inside of the reactor 22, so that the carbon dioxide in the gas-liquid mixture and the alkaline wastewater are better mixed and dispersed, increasing the contact area between them, which is beneficial to mass transfer and reaction process. The first one-way valve 1, the second one-way valve 12, and the third one-way valve 13 are set to ensure the one-way flow of the fluid in each pipeline, and no backflow occurs.

[0041] The discharge end of the first dosing pipe 10 and the discharge end of the second dosing pipe 11 are both connected to the first atomizing nozzle 14 at an upward inclination, and the two first atomizing nozzles 14 are arranged opposite to each other on the left and right. Through the arrangement of the first atomizing nozzle 14, the pre-mixed gas-liquid mixture is atomized and sprayed, and then collides and further broken into smaller droplets, thereby increasing the surface area of ​​the alkaline wastewater and the contact area with carbon dioxide. The atomized droplets and carbon dioxide will have a strong interaction during the collision process, so that carbon dioxide can fully penetrate into the droplets.

[0042] The inclination angles of the discharge end of the first dosing pipe 10 and the discharge end of the second dosing pipe 11 are both 30-60°. By setting the inclination angles, the gas-liquid mixture can collide better.

[0043] The impeller 15 is provided in the diffuser section 33, and the impeller 15 is located between the first one-way valve 1 and the throat section 32. By arranging the impeller 15 in the diffuser section 33, when the gas-liquid mixture premixed through the throat section 32 passes through the impeller 15, the impeller 15 is driven to rotate, and the rotating impeller 15 further stirs and mixes the gas-liquid mixture, so that the mixing effect is better and the contact area between them is increased.

[0044] Embodiment three:

[0045] like Figure 3 to Figure 4 As shown, this embodiment provides an alkaline wastewater treatment system, including the gas-liquid mixing dosing device of Example 2, a frame 16, a carbon dioxide storage tank 17, a first delivery pipe 18, a first regulating valve 19, a second delivery pipe 20, a second regulating valve 21, a reactor 22, a filter 23, a pressure release device 24, a water collection tank 25, a third delivery pipe 26, and a fourth one-way valve 27.

[0046] The gas-liquid mixing dosing device, the carbon dioxide storage tank 17, the reactor 22, the filter 23, the pressure release device 24, and the water collection tank 25 are all arranged on the frame 16. The carbon dioxide storage tank 17 is located above the venturi tube 3. The bottom of the carbon dioxide storage tank 17 is fixedly connected with a first delivery pipe 18, the bottom end of the first delivery pipe 18 is fixedly connected with the top of the throat section 32, the first delivery pipe 18 is provided with a first regulating valve 19, the upper part of the first delivery pipe 18 is fixedly connected with a second delivery pipe 20, the first delivery pipe 18 is provided with a second regulating valve 21, the discharge end of the second delivery pipe 20 passes through the top wall of the reactor 22 and extends to the top of the reactor 22, the water outlet of the reactor 22 is connected with the filter 23, the water outlet of the filter 23 is connected with the pressure release device 24, the water outlet of the pressure release device 24 is connected with the water collection tank 25, the exhaust port of the pressure release device 24 is fixedly connected with the bottom of the throat section 32 through the third delivery pipe 26, and the third delivery pipe 26 is provided with a fourth one-way valve 27.

[0047] During operation, the first regulating valve 19 is opened, and a part of the carbon dioxide in the carbon dioxide storage tank 17 is sent to the throat section 32 through the first delivery pipe 18, and premixed with the alkali liquid sent from the contraction section 31, and then the premixed gas-liquid mixture is sent into the reactor 22 through the gas-liquid mixing and dosing device. The second regulating valve 21 is opened, and a part of the carbon dioxide in the carbon dioxide storage tank 17 is sent to the reactor 22 through the second delivery pipe 20, sprayed from top to bottom, and collided with the gas-liquid mixture sprayed upward and tilted from left to right, which not only pressurizes the inside of the reactor 22, but also can better realize the reaction of alkaline wastewater and carbon dioxide. The liquid after the reaction of the reactor 22 enters the filter 23 for filtration, and the filtrate enters the pressure release device 24 for decompression treatment. The released carbon dioxide is refluxed to the throat through the third delivery pipe 26 to be premixed with alkaline wastewater. In this way, the solubility of carbon dioxide is increased by pressurization, and the filtrate after reaction and filtration is decompressed again to reduce the solubility of carbon dioxide, so that carbon dioxide is released from water, and carbon dioxide is reused, which saves more resources. The carbon dioxide is divided into two paths, one path is pre-mixed with the alkaline wastewater, and the other path is directly sent into the reactor 22 to collide and mix with the pre-mixed gas-liquid mixture. Both paths can play a pressurizing role and can achieve a good gas-liquid mixing effect.

[0048] The second delivery pipe 20 is provided with a cooling jacket 28, and the bottom of the discharge end of the second delivery pipe 20 is fixedly connected with a second atomizing nozzle 31, and the second atomizing nozzle 31 is located at the center of the upper part of the reactor 22. The lower the temperature, the higher the solubility of carbon dioxide in water. By providing the cooling jacket 28 on the second delivery pipe 20, the temperature of the carbon dioxide delivered through the second delivery pipe 20 is reduced, the solubility of carbon dioxide is further improved, the reaction efficiency is improved, and the pressure requirement is reduced.

[0049] The reactor 22 also includes a transmission assembly 29 and a stirring assembly 30. The stirring assembly 30 is provided at the lower part of the reactor 22, and the stirring assembly 30 is rotatably connected to the first rotating shaft 9 through the transmission assembly 29. The motor 8 rotates, driving the first rotating shaft 9 to rotate, and the stirring assembly 30 is driven to rotate through the transmission assembly 29 to perform a stirring operation. The gas-liquid mixture that drips down and collects is stirred and mixed in a large range and more comprehensively through stirring, which greatly improves the reaction efficiency. In addition, no additional power source is required, and only one motor 8 is needed to convey the pressurized gas-liquid mixture and stir and mix the gas-liquid mixture. The two are used together, and the design is ingenious.

[0050] The stirring assembly 30 includes a bearing seat 301, a second rotating shaft 302, and stirring blades 303. The bearing seat 301 is fixed below the front side wall of the reactor 22. The rear portion of the second rotating shaft 302 passes through the bearing seat 301 and the front side wall of the reactor 22, and extends to the interior of the reactor 22 where a plurality of stirring blades 303 are fixed. The transmission assembly 29 drives the second rotating shaft 302 to rotate, so that the stirring blades 303 rotate to perform stirring operations. The second rotating shaft 302 and the reactor 22, the second conveying pipe 20 and the reactor 22, the first dosing pipe 10 and the reactor 22, and the second dosing pipe 11 and the reactor 22 are all sealed.

[0051] The transmission assembly 29 includes a driving wheel 291, a driven wheel 292, and a transmission belt 293. The driving wheel 291 is fixed to the front end of the first rotating shaft 9, and the driven wheel 292 is fixed to the front end of the second rotating shaft 302. The driving wheel 291 and the driven wheel 292 are connected by the transmission belt 293. The first rotating shaft 9 rotates, driving the driving wheel 291 to rotate, and the driven wheel 292 is driven to rotate through the transmission belt 293, so that the second rotating shaft 302 rotates, driving the stirring blade 303 to rotate.

[0052] 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 and dosing device, characterized in that: It includes a venturi tube, a first one-way valve, a cylinder body, a piston, a connecting rod, a first swing rod, a second swing rod, a motor, a first rotating shaft, a first dosing pipe, a second dosing pipe, a second one-way valve, and a third one-way valve; The venturi tube comprises a contraction section, a throat section, and a diffusion section which are arranged in sequence from left to right. The diffusion section of the venturi tube is fixedly connected to a cylinder body, and the diffusion section is provided with a first one-way valve; A piston is slidably connected in the cylinder body, a connecting rod is fixed to the right end of the piston, a motor is arranged on the right side of the cylinder body, a first rotating shaft is fixed to the front end of the motor, a first swinging rod is fixed to the first rotating shaft, a second swinging rod is hinged to the outer end of the first swinging rod, and the left end of the second swinging rod is hinged to the connecting rod; The upper side wall on the left side of the cylinder body is fixedly connected with a first dosing pipe, and the first dosing pipe is provided with a second one-way valve; the lower side wall on the left side of the cylinder body is fixedly connected with a second dosing pipe, and the second dosing pipe is provided with a third one-way valve; The discharge end of the first dosing pipe and the discharge end of the second dosing pipe both extend above the interior of the reactor.

2. The gas-liquid mixing dosing device according to claim 1, characterized in that: The discharge end of the first dosing pipe and the discharge end of the second dosing pipe are both connected to the first atomizing nozzles in an upward tilted manner, and the two first atomizing nozzles are arranged opposite to each other on the left and right.

3. The gas-liquid mixing dosing device according to claim 1, characterized in that: The inclination angles of the discharge end of the first dosing pipe and the discharge end of the second dosing pipe are both 30-60°.

4. The gas-liquid mixing dosing device according to claim 1 is characterized in that: An impeller is arranged in the diffusion section, and the impeller is located between the first one-way valve and the throat section.

5. An alkaline wastewater treatment system, characterized in that: The invention comprises the gas-liquid mixing dosing device according to any one of claims 1 to 4, a frame, a carbon dioxide storage tank, a first delivery pipe, a first regulating valve, a second delivery pipe, a second regulating valve, a reactor, a filter, a pressure release device, a water collection tank, a third delivery pipe, and a fourth one-way valve; The gas-liquid mixing and dosing device, the carbon dioxide storage tank, the reactor, the filter, the pressure release device, and the water collection tank are all arranged on the frame; The carbon dioxide storage tank is located above the venturi tube, the bottom of the carbon dioxide storage tank is fixedly connected with a first delivery pipe, the bottom end of the first delivery pipe is fixedly connected with the top of the throat section, the first delivery pipe is provided with a first regulating valve, the upper part of the first delivery pipe is fixedly connected with a second delivery pipe, the first delivery pipe is provided with a second regulating valve, and the discharge end of the second delivery pipe passes through the top wall of the reactor and extends to the top of the inside of the reactor; The water outlet of the reactor is connected to the filter, the water outlet of the filter is connected to the pressure releaser, the water outlet of the pressure releaser is connected to the water collecting tank, the exhaust port of the pressure releaser is fixedly connected to the bottom of the throat section through the third delivery pipe, and the third delivery pipe is provided with a fourth one-way valve.

6. The alkaline wastewater treatment system according to claim 5, characterized in that: The outer jacket of the second conveying pipe is provided with a cooling jacket; The bottom of the discharge end of the second delivery pipe is fixedly connected with a second atomizing nozzle, and the second atomizing nozzle is located at the center of the upper part of the reactor.

7. The alkaline wastewater treatment system according to claim 5, characterized in that: It also includes a transmission component and a stirring component; A stirring assembly is disposed at the lower portion of the reactor, and the stirring assembly is rotationally connected to the first rotating shaft via a transmission assembly.

8. The alkaline wastewater treatment system according to claim 7, characterized in that: The stirring assembly includes a bearing seat, a second rotating shaft, and a stirring blade; A bearing seat is fixed below the front side wall of the reactor, and the rear portion of the second rotating shaft passes through the bearing seat and the front side wall of the reactor and extends to the interior of the reactor where a plurality of stirring blades are fixed.

9. The alkaline wastewater treatment system according to claim 8, characterized in that: The transmission assembly includes a driving wheel, a driven wheel, and a transmission belt; A driving wheel is fixed to the front end of the first rotating shaft, a driven wheel is fixed to the front end of the second rotating shaft, and the driving wheel and the driven wheel are connected by a transmission belt.

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