Gas-liquid reaction method based on carbon neutralization and neutralization tower

Abstract

The invention relates to the technical field of waste gas treatment, and particularly discloses a gas-liquid reaction method based on carbon neutralization and a neutralization tower, the neutralization tower comprises a tower body, a water spraying system is arranged at the upper part in the tower body, and a gas spraying system is arranged at the lower part in the tower body; the water spraying system ensures that an atomization channel is automatically opened under the set water pressure through a unique pressure-sensitive opening mechanism; the gas injection system can distribute carbon dioxide gas through a swingable gas injection pipe, and also can alternately clean the tower bottom through pneumatic control; a self-cleaning filtering device is further integrated to conduct pretreatment on inlet water, closed-loop intelligent control is achieved through a PH detection head and a liquid level meter, efficient filtering, intelligent atomization and automatic cleaning are integrated, and the problems that in the prior art, blockage is prone to occurring, mixing is uneven, shutdown cleaning is needed, and the automation degree is low are effectively solved; the efficient, stable and continuous operation of the carbon neutralization treatment of the alkaline wastewater is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a gas-liquid reaction method and neutralization tower based on carbon neutralization. BACKGROUND

[0002] A large amount of alkaline wastewater with pH value usually higher than 12.5 will be produced in the production process of a concrete mixing plant. If it is directly discharged, it will pollute the environment. If it is used for concrete production, it will affect the working performance, strength and durability. At present, the method of adding acid chemicals is often used for neutralization, but there are problems such as inaccurate control of addition amount, high operation cost and possible introduction of new impurities. Using carbon dioxide CO2 gas for neutralization is a more environmentally friendly and economical choice. However, the existing neutralization reaction technology and equipment still have significant deficiencies in efficiency, reliability and automation degree.

[0003] The patent document with publication number "CN214299451U" discloses a tower body for wastewater treatment. The core idea is to divide a single tower body into two independent reaction chambers by setting vertical partitions inside the tower body, so as to realize simultaneous and zoned treatment of acidic wastewater and alkaline wastewater. Although this scheme improves the space utilization of a single device, its technical focus is on the diversity of treatment objects rather than the optimization of the reaction process itself. Its reaction relies on simple spray and middle layer medium, which has the inherent disadvantages of insufficient gas-liquid mixing and low reaction efficiency, and completely ignores the technical problems of filter system blockage and bottom sediment cleaning in long-term operation of the equipment.

[0004] The patent document with publication number "CN221191806U" discloses a neutralization reactor for oil refining alkali residue wastewater treatment. Its innovation lies in setting a forced air cooling system containing cooling pipes and heat dissipation pipes on the outside of the neutralization tank to prevent the pressure in the tank from being too high by using an air compressor as power to timely export the reaction heat. Although this scheme solves the problems of temperature rise and safety in a specific application scenario, its technical means is passive and external, and does not touch on the gas-liquid mass transfer efficiency problem of the core of the reactor. It does not involve the pretreatment filtration and anti-clogging design for wastewater containing solid suspensions, and the function is relatively single.

[0005] The patent document with publication number "CN116020256A" discloses a gas-liquid reactor based on carbon neutralization, which has a higher technical level. By designing a curved, spiral or vortex-shaped mixing channel to prolong the gas-liquid contact time, and using a buffer unit with a buffer guide surface and an arc-shaped buffer ring to reduce the impact on the downstream packing, progress has been made in strengthening the initial mixing and reducing the impact. However, the system complexity is mainly concentrated in the initial stage of the reaction, and for a complete wastewater treatment system, it also lacks a self-cleaning device for precise filtration of the influent, and does not have the function of automatically cleaning the bottom sediment without stopping the machine. These are the key to ensure the continuous and stable operation of industrialization.

[0006] Therefore, the existing gas-liquid reaction neutralization tower lacks an influent filtration system, has low mixing efficiency, and lacks a function to clean the bottom sediment. SUMMARY

[0007] The present application provides a neutralization tower based on carbon neutralization, which has the characteristics of self-cleaning filtration, pressure-sensitive intelligent atomization, and automatic swing cleaning.

[0008] The first technical solution of the present application: a neutralization tower based on carbon neutralization, comprising a tower body, a water spraying system is arranged at the upper part of the tower body, and a gas spraying system is arranged at the lower part of the tower body, the water spraying system comprises an influent pipe, one end of the influent pipe extends into the tower body and is connected with a water spraying main pipe, a plurality of water spraying pipes are distributed on the water spraying main pipe, an atomizing nozzle is installed at the end of each water spraying pipe, a pressure-sensitive opening mechanism is arranged in the water spraying main pipe, the pressure-sensitive opening mechanism comprises a piston, the piston is slidingly arranged in the water spraying main pipe, the piston divides the inner cavity of the water spraying main pipe, a plug rod is connected to the upper surface of the piston, a clamping groove is formed in the plug rod, a straight spring is sleeved on the plug rod, and the two ends of the straight spring act on the piston and the inner top wall of the water spraying main pipe, respectively, a slide rod is connected to the lower surface of the piston, the lower end of the slide rod is connected with a support rod, a sealing ring is connected to the outer side of the support rod, the sealing ring is arranged corresponding to the inlet of the water spraying pipe, a water seal cover is fixed to the top of the water spraying main pipe, and the upper end of the plug rod penetrates through the water seal cover. When the water pressure reaches the set value, the water flow pressure pushes the piston to move upward against the resistance of the straight spring, the piston drives the plug rod and the slide rod to rise synchronously, the slide rod drives the sealing ring to separate from the inlet of the water spraying pipe through the support rod, thereby opening the atomizing channel, the water seal cover provides sealing and guiding function for the plug rod, the automatic start-stop control is realized through the pressure-sensitive mechanism, the stable operation of the system under normal working pressure is ensured, the invalid operation under low pressure is avoided, and the system energy efficiency and operation reliability are improved.

[0009] As preferred, the pressure-sensitive opening mechanism further comprises a clamping structure, the clamping structure comprises a rotating seat fixed to the outer wall of the water inlet pipe, a rotating rod rotatably arranged on the rotating seat, one end of the rotating rod is fixed with a flap, the flap is suspended in the flow passage of the water inlet pipe, the other end of the rotating rod is fixed with a bent plate, the bent plate is fixed with a clamping piece, the position of the clamping piece corresponds to the clamping groove on the plug rod, a torsional spring is sleeved on the rotating rod, the torsional spring provides a reset torque for the rotating rod. When the piston drives the plug rod to rise to a predetermined position, the water flow in the water inlet pipe impacts the flap to deflect it, the flap drives the rotating rod and the bent plate to rotate, the clamping piece is clamped into the clamping groove of the plug rod to realize mechanical locking, the torsional spring provides a reset torque to ensure automatic unlocking when the system stops, prevents the system from being mistakenly closed during water pressure fluctuations through the mechanical self-locking mechanism, improves the stability of the equipment operation, reduces the equipment wear caused by frequent start-stop, and prolongs the service life.

[0010] As preferred, the filter water pipe is further provided, the filter water pipe is connected with one end of the water inlet pipe, a self-cleaning filter device is arranged in the filter water pipe, the self-cleaning filter device comprises a barrel-shaped filter screen, the barrel-shaped filter screen is arranged inside the filter water pipe, a support is fixed to the inner wall of the filter water pipe, a rotating shaft is supported by a bearing on the support, a scraper and an impeller are fixedly installed on the rotating shaft, the scraper is in contact or gap fit with the inner wall of the barrel-shaped filter screen. When the wastewater enters the filter water pipe, the impeller is rotated by the impact of the water flow, the impeller drives the scraper to make circular motion through the rotating shaft, the scraper keeps contact or small gap with the inner wall of the barrel-shaped filter screen, continuously scrapes off the impurities attached to the surface of the filter screen, the support and the bearing ensure the stable operation of the rotating shaft, realizes automatic continuous cleaning by using water flow power, effectively prevents the filter screen from being blocked, ensures the stability of the filtering effect, reduces the maintenance cost and downtime.

[0011] As preferred, the self-cleaning filter device further comprises a sedimentation shell, the sedimentation shell is connected to the bottom of the filter water pipe, an inclined plate is arranged inside the sedimentation shell, a sedimentation pipe is connected to the outlet at the bottom of the sedimentation shell, the sedimentation pipe is connected with a blow-off pipe through an elbow, and a first valve is installed on the blow-off pipe. The filtered wastewater carrying the stripped impurities enters the sedimentation shell, in the sedimentation channel formed by the inclined plate, the solid particles are settled on the surface of the inclined plate by gravity and slide to the bottom, are collected through the sedimentation pipe and the elbow to the blow-off pipe, and the first valve controls the regular discharge. The gravity sedimentation improves the solid-liquid separation efficiency, the inclined plate structure increases the sedimentation area, facilitates the collection and cleaning of impurities, avoids secondary pollution of the system, and ensures the treatment effect.

[0012] As preferred, the self-cleaning filter device further comprises an arc-shaped guide vane, the arc-shaped guide vane is fixed to the inner side of the inlet of the filter water pipe, and the arc-shaped guide vane is located in front of the impeller. When the wastewater enters the filter water pipe, it first passes through the arc-shaped guide vane, the arc-shaped surface converts the straight water flow into a rotating flow field, optimizes the water flow direction and flow velocity distribution, and makes the water flow impact the impeller blade at the best angle, thereby improving the driving efficiency of the impeller and enhancing the self-cleaning effect, while reducing the water flow resistance, reducing energy loss, and improving the overall energy efficiency of the system.

[0013] As preferred, a water pipe joint is further included, the water pipe joint is connected to the side wall of the sedimentation pipe, a flat filter screen is installed inside the water pipe joint, a flushing pipe is connected to the water pipe joint, the other end of the flushing pipe extends into the interior of the water spray main pipe, part of the filtered wastewater enters the flushing system through the water pipe joint, and the clean water is transported to the interior of the water spray main pipe through the flushing pipe after being further filtered by the flat filter screen, thereby providing a continuous low-pressure flushing water flow to prevent the atomizing nozzles from being blocked and ensure stable atomizing effect and prolong the service life of the equipment, and the flat filter screen ensures the flushing water quality.

[0014] As preferred, a sealing baffle is further included, the sealing baffle is fixed to the lower part of the inner wall of the water spray main pipe, the sliding rod is in sliding connection with the sealing baffle, and the outlet of the flushing pipe is located in the area below the sealing baffle, the sealing baffle forms an independent isolation area in the interior of the water spray main pipe to ensure that the flushing water flow is limited in a specific area to directly act on the water spray pipeline, and the sealing baffle provides accurate guidance for the sliding rod to ensure smooth movement of the pressure-sensitive opening mechanism and improve the flushing efficiency and prevent water flow short circuiting, thereby ensuring stable and reliable movement of the pressure-sensitive opening mechanism and improving the system operation stability.

[0015] As preferred, the air injection system includes an air inlet pipe, the air inlet pipe penetrates through the tower wall of the tower body, a second air valve is arranged on the air inlet pipe, the air inlet pipe is communicated with an air injection main pipe, the air injection main pipe is arranged below the interior of the tower body, a plurality of pneumatic connectors are installed on the air injection main pipe, and an air injection pipe is connected to the output end of the pneumatic connector, carbon dioxide gas enters through the air inlet pipe, the flow rate is adjusted through the second air valve, and then the carbon dioxide gas enters the air injection main pipe, is distributed to each air injection pipe through the plurality of pneumatic connectors, and uniform gas distribution is formed in the tower, thereby realizing uniform distribution of the carbon dioxide gas, increasing the gas-liquid contact area, improving the neutralization reaction efficiency, ensuring that the reaction is fully carried out, and realizing accurate flow control through the second air valve.

[0016] As preferred, a fine pipe is further included, one end of the fine pipe is connected in parallel to the air inlet pipe, a first air valve and an exhaust valve are installed on the fine pipe, the other end of the fine pipe is connected to an air pipe connector, and the air pipe connector is communicated with the pneumatic connector, part of the gas is shunted from the air inlet pipe through the fine pipe, the first air valve is used for controlling the on-off, and the gas is transported to the pneumatic connector through the air pipe connector, the exhaust valve is used for system exhaust, the swing cleaning function of the air injection pipe is realized, the bottom of the tower is ensured to be clean, the main reaction is not affected, and the degree of automation of the system is improved.

[0017] As preferred, the inner cavity of the pneumatic joint is provided with a first cavity and a second cavity, a slidable sliding sheet is arranged in the first cavity, the sliding sheet is fixedly connected with the air jet pipe, a connecting pipe is arranged in the pneumatic joint, the connecting pipe is communicated with the first cavity, an arc spring is arranged in the second cavity, one end of the arc spring is connected with the sliding sheet through a top sheet and an arc push rod, so as to apply an elastic force to the sliding sheet to reset the air jet pipe, and the connecting pipe is communicated with the air pipe joint. When the cleaning gas enters the first cavity through the connecting pipe, the sliding sheet is pushed to move, the sliding sheet drives the air jet pipe to swing downward, and the arc spring is compressed at the same time, the arc spring resets the sliding sheet through the top sheet and the arc push rod when the gas supply is stopped, drives the air jet pipe to return to the original position, realizes accurate angle control and automatic reset of the air jet pipe, ensures the cleaning effect, and improves the operation reliability and equipment service life.

[0018] As preferred, the number of pneumatic joints is six, and the number of air pipe joints is two, each air pipe joint is communicated with the connecting pipes of three pneumatic joints. Three groups of air jet pipes are controlled through two air pipe joints respectively, so that the group cleaning is realized alternately, one group of air jet pipes is executed when the other group is kept normal, so that the neutralization reaction is not interrupted during the cleaning process, the equipment operation efficiency and processing capacity are improved, and continuous production is realized.

[0019] As preferred, the water outlet pipe is arranged at the bottom of the tower body, the second valve is arranged on the water outlet pipe, and the flange pipe is connected to the end of the water outlet pipe. The clean water treated to the standard is discharged from the system through the water outlet pipe, the second valve controls the water outlet flow, the flange pipe is convenient for connecting the subsequent pipeline, the valve control ensures the stable operation of the system, and the flange connection is convenient for equipment maintenance and system expansion.

[0020] As preferred, the first PH detection head is arranged on the inner side wall of the tower body. The pH value change in the reaction area is monitored in real time, the detection signal is transmitted to the control system, real-time data for process control is provided, the neutralization reaction is ensured to be carried out under the best conditions, and accurate control is realized.

[0021] As preferred, the second PH detection head is arranged on the water outlet pipe or the flange pipe. The pH value of the final effluent is detected, the treatment effect is monitored, the effluent quality is ensured to meet the reuse standard, quality control and standard discharge are realized.

[0022] As preferred, the liquid level meter is arranged on the side wall of the tower body, and the liquid level meter is communicated with the inside of the tower body. The liquid level height in the tower is monitored in real time, the liquid level signal is transmitted to the control system, overflow or idling is prevented, the safe and stable operation of the equipment is ensured, and automatic control is realized.

[0023] The second technical scheme of the application is a gas-liquid reaction method based on carbon neutralization, which comprises the following steps,

[0024] (S01) filtering the wastewater injected into the tower body;

[0025] (S02) spraying the filtered wastewater in the tower body to form water mist;

[0026] (S03) delivering carbon dioxide gas into the tower body to spray and perform gas-liquid neutralization reaction with the water mist;

[0027] (S04) monitoring the pH value in the tower and the pH value of the effluent water in real time by the pH detector, and feeding the monitoring data to the control system;

[0028] (S05) monitoring the liquid level in the tower by the liquid level meter, and feeding the monitoring data to the control system;

[0029] (S06) discharging the water that has been neutralized and confirmed to meet the standard from the bottom of the tower body.

[0030] Through the above steps, the neutralization treatment of alkaline wastewater is realized. First, the influent is subjected to solid-liquid separation, then the reaction contact area is increased by atomization, and then the neutralization reaction is performed with carbon dioxide, and online monitoring is performed to realize process control. Finally, the treated water that meets the standard is obtained, a complete wastewater treatment process chain is established, and the whole process automation control from influent to effluent is realized, ensuring stable and reliable treatment effect.

[0031] As a preferred, in step (S01), the alkaline wastewater is introduced into the filter water pipe, and the self-cleaning filter device in the filter water pipe is used to filter the wastewater. After the wastewater enters the filter water pipe, the impurities attached to the surface of the filter screen are automatically removed, the solid particles and other impurities in the wastewater are separated, and the self-cleaning function during the delivery of the wastewater is realized, avoiding the problem of blockage of the delivery pipeline, ensuring the continuous and stable operation of the system, and reducing the equipment maintenance requirement.

[0032] As a preferred, in step (S02), the filtered wastewater is sprayed through the water spraying main pipe and the atomizing nozzle to form atomized droplets. After the filtered wastewater enters the water spraying main pipe, the wastewater forms fine droplets through the atomizing nozzle, greatly increasing the gas-liquid contact specific surface area, and significantly improving the reaction efficiency through atomization treatment.

[0033] As a preferred, in step (S03), the carbon dioxide gas is delivered to the air injection main pipe through the air inlet pipe, and is sprayed out of the air injection pipe to fully mix and contact with the atomized droplets in the tower body to perform gas-liquid neutralization reaction and reduce the pH value of the wastewater. After the carbon dioxide gas is uniformly distributed through the air inlet pipe and the air injection main pipe, it is sprayed out of the multiple air injection pipes to form countercurrent contact with the atomized droplets in the tower, and the neutralization reaction is realized through gas-liquid mass transfer, realizing uniform distribution of the gas and efficient mass transfer, complete reaction, high utilization rate of carbon dioxide, and good neutralization effect.

[0034] As preferred, step (S05) monitors the pH value in the tower in real time by the first PH detection head and monitors the pH value of the effluent in real time by the second PH detection head. The first PH detection head is installed in the reaction zone to monitor the process pH value, and the second PH detection head is installed at the effluent outlet to monitor the final water quality. The detection data are transmitted to the control system in real time to realize the whole-process water quality monitoring, provide accurate data support for process adjustment, and ensure that the treatment effect meets the standard.

[0035] As preferred, the reaction process pH value monitored by the first PH detection head is controlled in the range of 9.0-11.5. When the pH value is lower than 9.0, the carbon dioxide gas inlet amount is reduced, and when the pH value is higher than 11.5, the carbon dioxide gas inlet amount is increased. The carbon dioxide gas inlet amount is dynamically adjusted according to the reaction process pH value, and precise adjustment is realized through the control system to maintain the reaction process at the optimal pH value.

[0036] As preferred, the effluent pH value monitored by the second PH detection head is controlled in the range of 6.5-8.5. When the effluent pH value is out of this range, the system automatically adjusts the process parameters. The effluent pH value is used as the final control target, and when the detection value is out of the set range, the system automatically adjusts the water inlet flow, carbon dioxide gas inlet amount and other process parameters to ensure that the effluent water quality meets the standard and the product quality is reliably controlled.

[0037] The present application has the following beneficial effects:

[0038] (1) By setting the self-cleaning filter device comprising a barrel-shaped filter screen, a water-driven impeller and a scraper, and innovatively introducing an arc-shaped guide vane to optimize the water flow, continuous and automatic scraping and separation of solid impurities in alkaline wastewater are realized;

[0039] (2) The filtered clean water is used for continuous backwashing of the water spray main pipe, and cooperates with the sealing baffle to effectively prevent the clogging of the atomizing nozzles, realize a complete anti-clogging, self-cleaning and washing function, completely overcome the clogging problem caused by the absence of pretreatment in the background technology, and ensure the long-term continuous and stable operation of the system;

[0040] (3) The pressure self-adaptive start-stop and running state locking of the atomizing system are realized through mechanical linkage. Only when the water inlet pressure reaches the set value and is sufficient to overcome the spring pre-tightening force, the atomizing channel will be opened to ensure that all the atomizing nozzles are atomized at the same time. At the same time, the clamping mechanism can effectively prevent the false closing caused by water pressure fluctuation. This not only solves the problems of insufficient mixing efficiency and reliability in the background technology, but also realizes the leap from simple spraying to intelligent and precise atomization, greatly improves the gas-liquid mass transfer efficiency and the operation reliability of the whole system;

[0041] (4) The jet system is combined with the cleaning function, a swing cleaning mechanism composed of a pneumatic joint, a sliding sheet, an arc spring and the like is designed, by controlling the gas circuit, part of the jet pipes can be driven to swing downward, directly flushing the sediment at the bottom of the tower, and by using the grouping and alternate cleaning strategy, the online cleaning is realized without interrupting the main neutralization reaction, which directly attacks the bottleneck of the lack of automatic cleaning function in the background technology, breaks the shackles of the traditional equipment which must be stopped for manual cleaning, greatly improves the automation degree and operation efficiency of the equipment;

[0042] (5) By integrating the first PH detection head, the second PH detection head and the liquid level meter, the water inlet and the air inlet are linked and adjusted, the real-time monitoring and closed-loop intelligent control of the whole neutralization process are realized, which not only ensures that the pH value of the effluent meets the reuse standard, but also realizes the precision and resource utilization of the treatment process, realizes the functions of efficient, stable and intelligent operation of the tower body. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0044] Figure 2 It is a schematic diagram of the overall structure of the present application;

[0045] Figure 3 It is a schematic diagram of the overall structure of the present application;

[0046] Figure 4 It is a schematic diagram of the internal pressure-sensitive opening mechanism of the water jet main pipe of the present application;

[0047] Figure 5 It is a schematic diagram of the clamping structure of the present application;

[0048] Figure 6 It is a schematic diagram of the structure section of the self-cleaning filter device of the present application;

[0049] Figure 7 It is an enlarged schematic diagram of the self-cleaning filter device of the present application;

[0050] Figure 8 It is a local schematic diagram of the water pipe joint of the present application;

[0051] Figure 9 It is a connection schematic diagram of the jet pipe group and the gas pipe joint of the present application;

[0052] Figure 10 It is a schematic diagram of the sectional structure of the pneumatic joint of the present application.

[0053] The marks in the drawings are: 100-tower body, 101-tower cover, 200-water spraying main pipe, 201-water spraying pipe, 202-atomizing nozzle, 203-water seal cover, 204-sliding rod, 205-branch rod, 206-seal ring, 207-piston, 208-plug rod, 2081-clamping groove, 209-straight spring, 210-rotary seat, 211-rotary rod, 212-flap, 213-bent plate, 214-clamping piece, 215-torsion spring, 216-sealing baffle, 300-water inlet pipe, 301-filtered water pipe, 3011-arc-shaped guide plate, 302-barrel-shaped filter screen, 303-bracket, 304-rotating shaft, 305-scraping piece, 306-impeller, 307-settling shell, 308-inclined plate, 309-settling pipe, 310-elbow, 311-dirty water pipe, 312-first valve, 400-water pipe joint, 401-flat filter screen, 402-flushing pipe, 500-air injection main pipe, 501-air inlet pipe, 502-pneumatic joint, 503-air injection pipe, 504-air pipe joint, 505-fine pipe, 506-first air valve, 507-air exhaust valve, 508-second air valve, 5021-first cavity, 5022-sliding piece, 5023-connection pipe, 5024-second cavity, 5025-arc-shaped spring, 5026-top piece, 5027-arc-shaped push rod, 600-water outlet pipe, 601-second valve, 602-flange pipe, 603-first PH detection head, 700-second PH detection head, 800-liquid level meter. DETAILED DESCRIPTION

[0054] The application will be further described below in conjunction with the drawings and examples, but not as the basis for limiting the application.

[0055] The neutralization tower based on carbon neutralization, such as Figures 1 to 4As shown, the system includes a tower body 100, a tower cover 101 on top of the tower body 100, a water spray system located inside the upper part of the tower body 100, and an air jet system located inside the lower part of the tower body 100. The water spray system includes a water inlet pipe 300, one end of which extends into the tower body 100 and connects to a main water spray pipe 200. Multiple water spray pipes 201 are distributed on the main water spray pipe 200, and each water spray pipe 201 has an atomizing nozzle 202 installed at its end. A pressure-sensitive opening mechanism is installed inside the main water spray pipe 200, including a piston 207. The piston 207 is slidably disposed inside the main water spray pipe 200, dividing the inner cavity of the main water spray pipe 200. The upper surface of the piston 207 is connected to… A stopper rod 208 is connected, and a slot 2081 is opened on the stopper rod 208. A straight spring 209 is sleeved on the stopper rod 208. The two ends of the straight spring 209 act on the piston 207 and the inner top wall of the water spray pipe 200, respectively. A slide rod 204 is connected to the lower surface of the piston 207. A support rod 205 is connected to the lower end of the slide rod 204. A sealing ring 206 is connected to the outside of the support rod 205. The sealing ring 206 is set at the inlet of the water spray pipe 201. A water seal cover 203 is fixed to the top of the water spray pipe 200. The upper end of the stopper rod 208 passes through the water seal cover 203. This pressure-sensitive opening mechanism can automatically open the atomization channel when the water pressure reaches the set value, ensuring that the system operates stably under normal working pressure.

[0056] like Figure 5 As shown, the pressure-sensitive opening mechanism also includes a locking structure, which includes a rotating seat 210 fixed to the outer wall of the water inlet pipe 300. A rotating rod 211 is rotatably mounted on the rotating seat 210. A flap 212 is fixed to one end of the rotating rod 211 and is suspended in the flow channel of the water inlet pipe 300. A bent plate 213 is fixed to the other end of the rotating rod 211 and a locking piece 214 is fixed on the bent plate 213. The position of the locking piece 214 corresponds to the slot 2081 on the plug rod 208. A torsion spring 215 is fitted on the rotating rod 211 and provides a reset torque for the rotating rod 211. This locking structure can automatically lock when the plug rod rises to the set position through the cooperation of the locking piece 214 and the slot 2081, preventing the system from being accidentally shut down when the water pressure fluctuates and improving the stability of the equipment operation.

[0057] like Figure 6As shown, the filter water pipe 301 is connected with one end of the water inlet pipe 300, and a self-cleaning filter device is arranged in the filter water pipe 301. The self-cleaning filter device comprises a barrel-shaped filter screen 302 arranged in the filter water pipe 301, a support 303 fixed to the inner wall of the filter water pipe 301, a rotating shaft 304 supported by a bearing on the support 303, a scraping blade 305 and an impeller 306 fixedly installed on the rotating shaft 304, and the scraping blade 305 is in contact or clearance fit with the inner wall of the barrel-shaped filter screen 302. The self-cleaning filter device utilizes the water flow power to automatically clean the filter screen, effectively prevents clogging, and ensures the filtering effect and continuous operation of the system.

[0058] As shown in Figure 7 , the self-cleaning filter device further comprises a sedimentation shell 307 connected to the bottom of the filter water pipe 301, an inclined plate 308 arranged in the sedimentation shell 307, a sedimentation pipe 309 connected to the bottom outlet of the sedimentation shell 307, a bend 310 connecting the sedimentation pipe 309 with a blowdown pipe 311, and a first valve 312 installed on the blowdown pipe 311. The structure can effectively collect and separate the filtered solid impurities, facilitate regular cleaning, and avoid secondary pollution.

[0059] As shown in Figure 6 , the self-cleaning filter device further comprises an arc-shaped guide vane 3011 fixed to the inner side of the inlet of the filter water pipe 301, and the arc-shaped guide vane 3011 is located in front of the impeller 306. The arc-shaped guide vane can optimize the water flow direction, increase the rotating speed of the impeller, and enhance the self-cleaning effect and filtering efficiency.

[0060] As shown in Figure 8 , the water pipe joint 400 is connected to the side wall of the sedimentation pipe 309, and a flat filter screen 401 is installed in the water pipe joint 400. The water pipe joint 400 is connected with a flushing pipe 402, and the other end of the flushing pipe 402 extends into the interior of the water spraying main pipe 200. The structure can provide continuous low-pressure flushing water flow, effectively prevent the clogging of the atomizing nozzles, and ensure the atomizing effect.

[0061] As shown in Figure 4 , a sealing baffle 216 is fixed to the lower part of the inner wall of the water spraying main pipe 200, the sliding rod 204 is slidingly connected with the sealing baffle 216, and the outlet of the flushing pipe 402 is located in the area below the sealing baffle 216. The sealing baffle can ensure that the flushing water flow directly acts on the water spraying pipeline, and improve the anti-clogging effect and flushing efficiency.

[0062] As shown in Figure 2 and Figure 9As shown, the air injection system comprises an air inlet pipe 501 which penetrates the tower wall of the tower body 100, the air inlet pipe 501 is provided with a second air valve 508, the air inlet pipe 501 is communicated with an air injection main pipe 500, the air injection main pipe 500 is arranged inside and below the tower body 100, a plurality of pneumatic connectors 502 are installed on the air injection main pipe 500, the output end of the pneumatic connector 502 is connected with an air injection pipe 503; the air injection system can realize uniform distribution of carbon dioxide gas, improve the gas-liquid contact area and the neutralization reaction efficiency.

[0063] As shown in Figure 2 and Figure 9 As shown, a thin pipe 505 is connected in parallel at one end of the air inlet pipe 501, the thin pipe 505 is provided with a first air valve 506 and an exhaust valve 507, the other end of the thin pipe 505 is connected with an air pipe connector 504, the air pipe connector 504 is communicated with the pneumatic connector 502; the structure can realize swing control of the air injection pipe, and facilitate effective cleaning of the tower bottom.

[0064] As shown in Figure 10 The inner cavity of the pneumatic connector 502 is provided with a first cavity 5021 and a second cavity 5024, a slidable sliding sheet 5022 is arranged inside the first cavity 5021, the sliding sheet 5022 is fixedly connected with the air injection pipe 503, a connecting pipe 5023 is arranged in the pneumatic connector 502, the connecting pipe 5023 is communicated with the first cavity 5021, an arc-shaped spring 5025 is arranged in the second cavity 5024, one end of the arc-shaped spring 5025 is connected with the sliding sheet 5022 through a top sheet 5026 and an arc-shaped push rod 5027, so as to apply an elastic force to the sliding sheet 5022 to reset the air injection pipe 503, the connecting pipe 5023 is communicated with the air pipe connector 504; the structure can realize automatic reset and accurate control of the air injection pipe, and ensure cleaning effect and operation reliability.

[0065] As shown in Figure 9 The number of the pneumatic connector 502 is six, and the number of the air pipe connector 504 is two, each air pipe connector 504 is communicated with the connecting pipes 5023 of three pneumatic connectors 502; the grouping design can realize alternate cleaning, ensure that the neutralization reaction process is not interrupted, and improve the equipment operation efficiency.

[0066] As shown in Figure 1 The water outlet pipe 600 is arranged at the bottom of the tower body 100, the second valve 601 is installed on the water outlet pipe 600, and the flange pipe 602 is connected at the end of the water outlet pipe 600; the water outlet system is convenient for discharging and collecting the treated clean water, and facilitates equipment maintenance.

[0067] As shown in Figure 1As shown, it also includes a first pH detection head 603, which is installed on the inner side wall of the tower body 100; the detection head can monitor the pH value change in real time during the reaction process.

[0068] like Figure 2 As shown, it also includes a second pH detection head 700, which is installed on the outlet pipe 600 or flange pipe 602; this detection head can ensure that the water quality of the outlet water meets the standards, and realize quality control and discharge standard monitoring.

[0069] like Figure 1 As shown, it also includes a level gauge 800, which is installed on the side wall of the tower body 100 and is connected to the interior of the tower body 100. The level gauge can monitor the liquid level in the tower in real time, ensuring the safe operation of the equipment and preventing overflow or dry running.

[0070] The working principle of this invention is as follows:

[0071] When the system starts up, alkaline wastewater first enters the filter pipe 301, where it forms a rotating flow under the guidance of the arc-shaped guide vanes 3011. This innovative design achieves a dual function: it continuously self-cleans the barrel-shaped filter screen 302 by driving the impeller 306 with hydraulic power to drive the scraper 305, and it significantly improves the solid-liquid separation efficiency through centrifugal force. The separated solid particles enter the settling shell 307 with the water flow, where they undergo preliminary concentration and settling in the settling channel formed by the inclined plates 308. Subsequently, the concentrated sludge particles are collected through the settling pipe 309, guided by the elbow 310, and enter the sewage pipe 311, where they are discharged periodically and controllably through the first valve 312.

[0072] Meanwhile, a water pipe connector 400 is installed on the side wall of the settling pipe 309, through which part of the filtered wastewater enters the flushing system. A flat filter screen 401 is installed inside the water pipe connector 400 to finely filter the passing wastewater, ensuring the cleanliness of the water entering the flushing system. The water finely filtered by the flat filter screen 401 is transported to the main spray pipe 200 through the flushing pipe 402. A sealing baffle 216 is installed inside the main spray pipe 200, fixed to the lower part of the main pipe to form an independent isolation area. The function of the sealing baffle 216 is to ensure that the flushing water flow is confined to a specific area, acting directly on the spray pipe system, effectively preventing short-circuiting of the water flow, and significantly improving flushing efficiency and anti-clogging effect.

[0073] The pretreated clean wastewater then enters the inlet pipe 300. When the system detects that the water pressure has reached the set working pressure, the pressure-sensitive opening mechanism responds immediately: the water pressure pushes the piston 207 upward, which, through the lever transmission mechanism composed of the slide rod 204 and the support rod 205, drives the sealing ring 206 to open the atomization channel. The locking mechanism, which works in conjunction with the system, automatically locks under the action of water flow, ensuring that the system can maintain a stable operating state even when the water pressure fluctuates.

[0074] At the same time of the normal operation of the atomization system, carbon dioxide gas enters the system through the gas inlet pipe 501, and after the flow rate is accurately adjusted by the second gas valve 508, it enters the gas injection main pipe 500 and is uniformly distributed through the distributed gas injection pipe 503. At this time, the pretreated wastewater is formed into fine droplets by the atomizing nozzle 202, and forms an efficient countercurrent contact pattern with the carbon dioxide gas in the tower. The gas-liquid two-phase completes the mass transfer and neutralization reaction in the process of sufficient contact, effectively reducing the pH value of the wastewater.

[0075] During the reaction, the intelligent control system monitors the reaction process in real time through the first PH detection head 603, and the second PH detection head 700 accurately detects the water quality, and the liquid level meter 800 continuously monitors the liquid level state in the tower. When the system detects that the sediment accumulation at the bottom of the tower reaches the set threshold, the automatic cleaning program is started: by controlling the first gas valve 506, part of the gas is diverted through the thin pipe 505, pushing the sliding sheet 5022 in the pneumatic joint 502, driving the gas injection pipe 503 to swing downward to the best cleaning angle to implement efficient cleaning. The innovative group alternating cleaning mechanism ensures that the main reaction continues while the bottom of the tower is thoroughly cleaned.

[0076] After sufficient reaction, the effluent pH value meets the industrial reuse standard and is discharged through the effluent pipe 600, realizing the recycling of water resources; while the concentrated solid sediment is periodically discharged through the sludge discharge system composed of the sedimentation pipe 309, the elbow 310, the blowdown pipe 311 and the first valve 312, thereby completing the entire treatment process from the influent to the effluent.

[0077] The gas-liquid reaction method based on carbon neutralization includes the following steps:

[0078] (S01) filtering the wastewater injected into the tower body;

[0079] (S02) spraying the filtered wastewater in the tower body to form a water mist;

[0080] (S03) delivering carbon dioxide gas into the tower body to spray and perform gas-liquid neutralization reaction with the wastewater mist;

[0081] (S04) monitoring the reaction pH value and effluent pH value in the tower in real time through the PH detection head, and feeding the monitoring data to the control system;

[0082] (S05) monitoring the liquid level in the tower through the liquid level meter, and feeding the monitoring data to the control system;

[0083] (S06) discharging the water that has been neutralized and confirmed to meet the standard from the bottom of the tower body.

[0084] In step (S01), the alkaline wastewater is introduced into the filtering water pipe 301, and the self-cleaning filtering device in the filtering water pipe 301 is used to filter the wastewater. In step (S02), the filtered wastewater is sprayed through the water spraying main pipe 200 and the atomizing nozzle 202 to form atomized droplets. In step (S03), the carbon dioxide gas is introduced into the gas spraying main pipe 500 through the gas inlet pipe 501, and is sprayed through the gas spraying pipe 503 to mix with the atomized droplets in the tower 100 to perform the gas-liquid neutralization reaction and reduce the pH value of the wastewater. In step (S05), the first PH detection head 603 is used to monitor the pH value of the reaction in the tower in real time, and the second PH detection head 700 is used to monitor the pH value of the effluent in real time.

[0085] The pH value of the reaction process monitored by the first PH detection head 603 is controlled in the range of 9.0-11.5. When the pH value is lower than 9.0, the amount of the carbon dioxide gas is reduced, and when the pH value is higher than 11.5, the amount of the carbon dioxide gas is increased. The pH value of the effluent monitored by the second PH detection head 700 is controlled in the range of 6.5-8.5. When the pH value of the effluent is out of the range, the system automatically adjusts the process parameters.

[0086] Firstly, in step (S01), the alkaline wastewater is introduced into the filtering water pipe, and the self-cleaning filtering device is used to complete the pretreatment. The device realizes the solid-liquid separation through the barrel-shaped filter screen, and the impurities on the surface of the filter screen are automatically removed by the rotation of the scraper driven by the impeller under the water flow power, and the inclined plate structure in the settling shell promotes the separation and settlement of the solid particles. The beneficial effect of this design is that the continuous self-cleaning of the filtering system is realized, the filter screen is effectively prevented from being blocked, the long-term stable operation of the system is ensured, and the maintenance cost is significantly reduced.

[0087] In step (S02), the pretreated wastewater is introduced into the water spraying main pipe, and when the water pressure reaches the set value, the pressure-sensitive opening mechanism is automatically started, and the wastewater is formed into fine mist droplets through the atomizing nozzle. The beneficial effect of this process is that the gas-liquid contact area is greatly increased through the atomizing treatment, and the pressure-sensitive control ensures that the system operates in the best working condition, which not only improves the reaction efficiency, but also realizes the energy-saving operation.

[0088] In step (S03), the carbon dioxide gas is introduced into the gas spraying main pipe through the gas inlet pipe, and is sprayed through the multiple gas spraying pipes after being uniformly distributed to form countercurrent contact with the atomized droplets in the tower to complete the gas-liquid neutralization reaction. The beneficial effect of this design is that the optimal distribution and efficient mass transfer of the gas are realized, the reaction is ensured to be fully carried out, and the utilization rate and neutralization efficiency of the carbon dioxide are significantly improved.

[0089] In steps (S04) and (S05), the system monitors the pH value control range 9.0-11.5 of the reaction process in real time through the first PH detection head, monitors the effluent pH value control target 6.5-8.5 through the second PH detection head, and continuously monitors the liquid level in the tower through the liquid level meter. All monitoring data are fed back to the control system in real time. The beneficial effect of this monitoring system is to realize intelligent control throughout the process, provide accurate data support for process parameter optimization, and ensure stable operation of the system in the best state.

[0090] In step (S06), the water body that has been fully reacted and confirmed to meet the standard is discharged from the bottom of the tower body. Through strict process control and multiple monitoring safeguards, it is ensured that the effluent water quality is stable and meets the reuse standard. The beneficial effect of this complete process flow is to realize the unity of wastewater treatment and resource recovery, which not only solves the problem of environmental pollution, but also realizes the recycling of water resources, with significant economic and environmental benefits.

Claims

1. A carbon neutralization based neutralization tower characterized by: The utility model provides a water conservancy tower, which comprises a tower body (100), a water injection system arranged above the tower body (100) and an air injection system arranged below the tower body (100), wherein the water injection system comprises a water inlet pipe (300), one end of the water inlet pipe (300) extends into the tower body (100) and is connected with a water injection main pipe (200), a plurality of water injection pipes (201) are distributed on the water injection main pipe (200), an atomizing nozzle (202) is arranged at the end of each water injection pipe (201), a pressure-sensitive opening mechanism is arranged in the water injection main pipe (200), the pressure-sensitive opening mechanism comprises a piston (207), the piston (207) is slidably arranged in the water injection main pipe (200), the piston (207) divides the inner cavity of the water injection main pipe (200) into two parts, a plug rod (208) is connected to the upper surface of the piston (207), a clamping groove (2081) is formed in the plug rod (208), a straight spring (209) is sleeved on the plug rod (208), the two ends of the straight spring (209) are arranged on the piston (207) and the inner top wall of the water injection main pipe (200) respectively, a slide rod (204) is connected to the lower surface of the piston (207), a support rod (205) is connected to the lower end of the slide rod (204), a sealing ring (206) is connected to the outer side of the support rod (205), the sealing ring (206) is arranged at the inlet of the water injection pipe (201), a water seal cover (203) is fixed to the top of the water injection main pipe (200), and the upper end of the plug rod (208) penetrates through the water seal cover (203).

2. The carbon neutral based neutralization tower of claim 1, characterized by: The pressure-sensitive opening mechanism further comprises a clamping structure, the clamping structure comprises a rotating seat (210), the rotating seat (210) is fixed to the outer wall of the water inlet pipe (300), a rotating rod (211) is rotatably arranged on the rotating seat (210), a flap (212) is fixed to one end of the rotating rod (211), the flap (212) is suspended in the flow channel of the water inlet pipe (300), a bent plate (213) is fixed to the other end of the rotating rod (211), a clamping piece (214) is fixed to the bent plate (213), the position of the clamping piece (214) corresponds to the clamping groove (2081) on the plug rod (208), a torsional spring (215) is sleeved on the rotating rod (211), and the torsional spring (215) provides a reset torque for the rotating rod (211).

3. The carbon neutral based neutralization tower of claim 1, characterized by: Further comprising a filter water pipe (301) connected with one end of the water inlet pipe (300), a self-cleaning filter device is arranged in the filter water pipe (301), the self-cleaning filter device comprises a barrel-shaped filter screen (302), the barrel-shaped filter screen (302) is arranged inside the filter water pipe (301), a support (303) is fixed on the inner wall of the filter water pipe (301), a rotating shaft (304) is supported on the support (303) through a bearing, a scraper (305) and an impeller (306) are fixedly installed on the rotating shaft (304), and the scraper (305) is in contact or gap fit with the inner wall of the barrel-shaped filter screen (302).

4. The carbon neutral based neutralization tower of claim 3, characterized by: The self-cleaning filter device further comprises a sedimentation shell (307) connected to the bottom of the filter water pipe (301), an inclined plate (308) is arranged in the sedimentation shell (307), a sedimentation pipe (309) is connected to the bottom outlet of the sedimentation shell (307), the sedimentation pipe (309) is connected with a blowdown pipe (311) through an elbow (310), and a first valve (312) is installed on the blowdown pipe (311).

5. The carbon neutral based neutralization tower of claim 3, characterized by: The self-cleaning filter device further comprises an arc-shaped guide vane (3011) fixed to the inner side of the inlet of the filter water pipe (301), and the arc-shaped guide vane (3011) is located in front of the impeller (306).

6. The carbon neutral based neutralization tower of claim 4, characterized by: Further comprising a water pipe joint (400) connected to the side wall of the sedimentation pipe (309), a flat filter screen (401) is installed in the water pipe joint (400), and a flushing pipe (402) is connected to the water pipe joint (400), one end of the flushing pipe (402) extends into the water injection main pipe (200).

7. The carbon neutral based neutralization tower of claim 6, characterized by: Further comprising a sealing baffle (216) fixed to the lower part of the inner wall of the water injection main pipe (200), the sliding rod (204) is in sliding connection with the sealing baffle (216), and the outlet of the flushing pipe (402) is located in the area below the sealing baffle (216).

8. The carbon neutral based neutralization tower of claim 1, characterized by: The air injection system comprises an air inlet pipe (501) penetrating through the tower wall of the tower body (100), a second air valve (508) is arranged on the air inlet pipe (501), the air inlet pipe (501) is communicated with an air injection main pipe (500), the air injection main pipe (500) is arranged inside and below the tower body (100), a plurality of pneumatic joints (502) are installed on the air injection main pipe (500), and the output end of each pneumatic joint (502) is connected with an air injection pipe (503).

9. A gas-liquid reaction method based on carbon neutralization, characterized by: The neutralization tower based on carbon neutralization according to any one of claims 1-8, comprising the following steps, (S01) filtering the wastewater injected into the tower body; (S02) spraying the filtered wastewater in the tower body to form water mist; (S03) delivering carbon dioxide gas into the tower body to spray and perform gas-liquid neutralization reaction with the water mist. (S04) The pH detection head is used to monitor the pH value of the reaction in the tower and the pH value of the effluent water in real time, and the monitoring data is fed back to the control system; (S05) The liquid level in the tower is monitored by the liquid level meter, and the monitoring data is fed back to the control system; (S06) The water that has been neutralized and confirmed to meet the standards is discharged from the bottom of the tower body.

10. The carbon neutral based gas-liquid reaction process of claim 9, wherein: In the step (S01), the alkaline wastewater is introduced into the filtering water pipe (301), and the self-cleaning filtering device in the filtering water pipe (301) is used to filter the wastewater; In the step (S02), the filtered wastewater is sprayed out in the form of atomized droplets through the atomizing nozzle (202) of the water spraying main pipe (200); In the step (S03), the carbon dioxide gas is transported to the air injection main pipe (500) through the air inlet pipe (501), and is sprayed out through the air injection pipe (503) to fully mix and contact with the atomized droplets in the step (S02) in the tower body (100) to perform the gas-liquid neutralization reaction; In the step (S05), the first PH detection head (603) is used to monitor the pH value of the reaction in the tower in real time, and the second PH detection head (700) is used to monitor the pH value of the effluent water in real time; The pH value of the reaction process monitored by the first PH detection head (603) is controlled in the range of 9.0-11.5, when the pH value is lower than 9.0, the carbon dioxide gas inlet amount is reduced, and when the pH value is higher than 11.5, the carbon dioxide gas inlet amount is increased; The second PH detection head (700) monitors the pH value of the effluent water, and the control target is 6.5-8.5, when the pH value of the effluent water exceeds this range, the system automatically adjusts the process parameters.

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