CN114259972A - Liquid-liquid two-phase mixing device of chlorine dioxide enhanced reactor - Google Patents
Liquid-liquid two-phase mixing device of chlorine dioxide enhanced reactor Download PDFInfo
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- CN114259972A CN114259972A CN202210014128.8A CN202210014128A CN114259972A CN 114259972 A CN114259972 A CN 114259972A CN 202210014128 A CN202210014128 A CN 202210014128A CN 114259972 A CN114259972 A CN 114259972A
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- 239000007788 liquid Substances 0.000 title claims abstract description 259
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 157
- 238000002156 mixing Methods 0.000 title claims abstract description 104
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 78
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 78
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 48
- 239000002253 acid Substances 0.000 claims abstract description 24
- 239000012495 reaction gas Substances 0.000 claims abstract description 21
- 238000005728 strengthening Methods 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 47
- 238000006243 chemical reaction Methods 0.000 abstract description 24
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- 239000007791 liquid phase Substances 0.000 description 6
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- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
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Abstract
The invention discloses a liquid-liquid two-phase mixing device of a chlorine dioxide strengthening reactor, which comprises a premixing reaction gas-collecting cup and a mixed liquid collecting cylinder; the mixed liquid collecting cylinder is arranged above and communicated with the chlorine dioxide enhanced reactor, and the mixed liquid enters the mixed liquid collecting cylinder in a pulsating liquid discharge mode; the premixing reaction gas collection cup is arranged above the mixed liquid collection cylinder and is communicated with the mixed liquid collection cylinder; the premixing reaction gas collection cup is provided with a chlorate liquid inlet and an acid liquid inlet; the invention can enable chlorate solution and acid solution to enter the rotating cavity body tangentially at the same time, collision fluid is generated by head-on collision, and the collision flow formed by the collision of the chlorate solution and the acid solution can enable two-phase liquid to realize contact and mass transfer under the conditions of high dispersion, high turbulence, strong mixing and rapid interface updating, thereby completing the mixing of the two liquids.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a liquid-liquid two-phase mixing device of a chlorine dioxide strengthening reactor.
Background
Chlorine dioxide (ClO)2) Is a gas from yellow green to orange yellow, and is a fourth generation green disinfection product which is recognized as environment-friendly, safe and nontoxic by the international health organization.
The production of chlorine dioxide is the result of a liquid, gas reaction. Generally, a chlorate solution is one phase, an acid solution is the other phase, when the chlorine dioxide is prepared, a small amount of chlorine dioxide can be generated by premixing the solution and the solution, the property of the chlorine dioxide is active, the chlorine dioxide is easy to explode, and the chlorine dioxide is toxic, so that the concentration of the generated chlorine dioxide in a chlorine dioxide preparation system is strictly controlled, and air is a safety guarantee phase for controlling the concentration of the chlorine dioxide.
At present, the formula, reaction temperature and pressure of reaction raw materials of domestic chlorine dioxide production enterprises are basically the same and different, but the raw material mixing modes are different, and the formula, the reaction temperature and the pressure are summarized as mechanical stirring and mixing, air stirring and mixing, tower-type falling mixing, multi-tooth subdivision mixing, gallery curved flow mixing and the like. However, all these mixing methods are in the range of macro-mixing, and it is difficult to achieve micro-uniform mixing.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a liquid-liquid two-phase mixing device for a chlorine dioxide enhanced reactor, which well solves the problem of micro-uniform mixing of raw materials for chlorine dioxide reaction.
The invention is realized by constructing a liquid-liquid two-phase mixing device of a chlorine dioxide strengthening reactor, which comprises a premixing reaction gas-collecting cup and a mixed liquid collecting cylinder;
the mixed liquid collecting cylinder is arranged above and communicated with the chlorine dioxide enhanced reactor, a mixed liquid siphon discharge pipe is arranged in the mixed liquid collecting cylinder, and the mixed liquid enters the mixed liquid collecting cylinder in a pulsating liquid discharge mode;
the premixing reaction gas collecting cup is arranged above the mixed liquid collecting cylinder and communicated with the mixed liquid collecting cylinder, a premixing cavity is arranged in the premixing reaction gas collecting cup, a premixed liquid overflow hole pipe is arranged in the premixing cavity, and premixed liquid is placed in a siphon mode and enters the mixed liquid collecting cylinder through the premixed liquid overflow hole pipe;
the premixing reaction gas collection cup is provided with a chlorate liquid inlet and an acid liquid inlet which are positioned on the same plane, chlorate liquid enters the premixing cavity from the chlorate liquid inlet in a left-handed rotary motion, and acid liquid enters the premixing cavity from the acid liquid inlet in a right-handed rotary motion, so that the chlorate liquid and the acid liquid are collided in a head-on mode to complete premixing.
Preferably, a central air supply spray pipe axially penetrates through the premixing reaction air collection cup, a bypass hole capable of allowing air to enter the premixing cavity is formed in the central air supply spray pipe, and the lower end of the central air supply spray pipe is communicated to the mixed liquid collecting cylinder.
Preferably, the liquid-liquid two-phase mixing device also comprises an air inlet pipe and a chlorine dioxide discharge pipe,
the air inlet pipe is respectively communicated with the central air supply spray pipe and the chlorine dioxide strengthening reactor and provides air for the premixing cavity, the mixed liquid collecting cylinder and the chlorine dioxide strengthening reactor;
the chlorine dioxide discharge pipe is respectively communicated with the premixing cavity, the mixed liquid collecting barrel and the chlorine dioxide strengthening reactor to discharge chlorine dioxide.
Preferably, an overflow hole pipe located in the premixing cavity is arranged on the periphery of the central air supply spray pipe, a reserved overflow channel is formed between the central air supply spray pipe and the overflow hole pipe through the plugging of the premixing cavity, a circle of overflow hole pipe orifices are formed in the overflow hole pipe, overflow hole pipe covers located outside the overflow hole pipe orifices are fixedly arranged on the periphery of the overflow hole pipe, and a premixing siphon channel is formed between the overflow hole pipe covers and the overflow hole pipe.
Preferably, the bottom of center air feed spray tube is provided with the spray tube undergauge portion that lets the air better get into premix cavity 4, the bottom of overflow hole pipe is provided with the hole pipe undergauge portion that forces the mixed liquid microcosmic even later to fall into the mixed liquid collecting vessel.
The lower part of the premixing reaction gas collection cup is a conical part with the diameter gradually reduced so that the premixing liquid can better enter the premixing siphon channel, and the lower end of the conical part is provided with a premixing cavity lower plug core.
Preferably, a ventilating plate positioned at the upper part of the premixing cavity is arranged in the premixing reaction gas collection cup, a chlorine dioxide ventilating hole is formed in the ventilating plate, and the chlorine dioxide discharge pipe 14 is communicated above the ventilating plate; and a sealing plate is arranged at the end part of the premixing reaction gas collection cup.
Preferably, a mixed liquid siphon cover covering the mixed liquid siphon discharge pipe is arranged in the mixed liquid collecting cylinder, a lower siphon channel is formed between the mixed liquid siphon cover and the mixed liquid siphon discharge pipe, and a lower hole is formed in the lower portion of the mixed liquid siphon cover. The lower part of the mixed liquid collecting cylinder is a lower bottom plate, and the lower bottom plate is provided with a mounting groove for mounting a mixed liquid siphon cover.
Preferably, the lower part of the mixed liquid siphon discharge pipe is provided with a liquid-sealed elbow pipe, and the elbow pipe is positioned between the mixed liquid collecting cylinder and the liquid inlet of the chlorine dioxide strengthening reactor.
Preferably, the top of mixed liquid siphon cover is liquid siphon cover shrouding, is provided with the hemisphere that lets premix liquid more evenly get into mixed liquid collecting cylinder above this liquid siphon cover shrouding.
Preferably, the upper end of the mixed liquid collecting cylinder is provided with an installation opening for installing a pre-mixing reaction gas-collecting cup, and the outer wall of the mixed liquid collecting cylinder is provided with a joint communicated with a chlorine dioxide discharge pipe.
When the fluid collision device is used, chlorate solution and acid solution enter the rotating cavity tangentially at the same time, collision fluid is generated by rotating head-on collision, and the liquid phase are the chlorate solution and the acid solution respectively; liquid and liquid fluid enter a rotating cavity at an inlet of the rotating cavity in a tangential direction at a speed of 10-15 m/s, the entering directions of the liquid and the liquid fluid are left and right tangential directions, namely the two rotation directions are opposite, the two fluids enter from a chlorate fluid inlet and an acid fluid inlet respectively at equal speed and equal quantity, then are ejected to form jet flow and collide to form a circular (fan) -shaped film (mist) surface perpendicular to the jet flow direction, the two fluids are mixed to a certain degree, form swirling motion in the rotating cavity and collide, and the collision flow formed by the collision of the two fluids can realize contact and mass transfer of the two-phase liquid under the conditions of high dispersion, high turbulence, strong mixing and rapid updating of an interface.
The principle of the invention is summarized as follows:
liquid-liquid contact and reaction are carried out,
the application of the rotary gravity reaction technology to chlorine dioxide production was originally proposed based on the enhancement of the gas-liquid contact process, which involved only limited transfer of the gas-liquid two phases. However, no technique for enhancing the transfer between liquid and liquid phases is known. Based on the basis of the chlorine dioxide preparation for years, the liquid distributor for the gas-liquid contact chlorine dioxide preparation is found to have obvious effect on the contact mixing of liquid and liquid after being improved. From the perspective of the reinforced transfer process and the micro-mixing, a novel mechanism for reinforcing the liquid-liquid mixing and contact process is provided, namely the novel mechanism tangentially enters a rotating cavity and generates collision fluid by head-on collision, so that the transfer reinforcement between gas and liquid phases is expanded to the transfer reinforcement between liquid, liquid and gas phases. And exploration and test work is carried out on the aspects of liquid-liquid micromixing, liquid-liquid reaction characteristics and the like.
The micro mixing of liquid and liquid is one of the most effective methods for strengthening the transmission between the liquid and the liquid phases in the preparation of chlorine dioxide. Has very obvious effect on effectively strengthening the reaction characteristics of preparing chlorine dioxide and liquid.
And (3) micro mixing, wherein the mixing phenomenon can be divided into macro mixing and micro mixing according to the scale of mixing. Macroscopic mixing refers to a large-scale mixing phenomenon, such as in stirring mixing, in which a fluid is circulated on a device scale due to a mechanical stirring action, so that the fluid is mixed on the device scale. Micromixing refers to the process of small-scale turbulent flow breaking up fluid into micelles, collision, coalescence and redispersion between micelles, and molecular-scale homogenization of liquid and liquid systems by molecular diffusion. While good micromixing is a necessary condition for the chlorine dioxide reaction process to proceed. The mixing effect of the liquid and the liquid phases also directly influences the conversion rate and the production rate of the chlorine dioxide reaction.
Mixing is a process of molecular-level uniformity through bulk diffusion, vortex diffusion and molecular diffusion under the action of forced convection. During mixing, large-scale vortex micro-clusters are formed firstly, under the action of turbulent flow stretching and shearing, large vortices are split into smaller-scale vortices, energy is transferred from the large vortices to small vortices, and the small vortices are transferred to smaller vortices until reaching the smaller-scale vortices. This process shows that mixing starts from large-scale convection motion first, then follows with small-scale, i.e. vortex diffusion, to further deform and divide the larger droplet micelles into smaller micelles, and through vortex diffusion between the interfaces of the small micelles, the degree of non-uniformity is reduced to the size of the vortex itself until reaching the scale, which is the maximum limit of macro-mixing. Micromixing is mixing on a molecular scale, the ultimate achievement of which can only be by molecular diffusion within the smallest-scale micelles, which is the controlling factor in achieving micromixing.
In liquid mixing, there are two essential elements of achieving mixing, namely the need for bulk convective flow to ensure that there are no quiescent zones within the apparatus, and the need for an intense or high shear mixing zone that provides conditions to achieve the mixing requirements for reduced homogeneity or enhanced process rates.
Liquid mixing can be divided into laminar mixing and turbulent mixing.
Laminar flow mixing, under laminar flow conditions, the inertia force is rapidly reduced under the action of fluid viscosity, the viscous force plays a leading role, so that flowing liquid has great velocity gradient in a boundary layer, the laminar flow areas have high shear rate, fluid elements deform and extend, the volume of the fluid elements is gradually reduced, and the final homogenization of the mutually soluble liquid can be realized only through molecular diffusion. In laminar flow mixing, molecular diffusion is always present, but before the fluid volume becomes sufficiently small, the size of its specific surface area is not sufficient to make the diffusion rate an important factor. In laminar mixing the size of the fluid elements themselves gradually decreases as mixing progresses, while at the same time the concentration difference between different fluid elements also decreases due to molecular diffusion, largely due to the increase in the area available for diffusion as the size of the fluid elements decreases. Thus, laminar mixing is closely related to the interphase contact area.
And ② turbulent mixing, in the common mixing equipment, the main fluid flow is turbulent flow. Due to the action of external force, the fluid generates turbulent vortex diffusion in the flowing process, and the mixing rate caused by the vortex diffusion is much higher than that caused by a laminar flow mechanism. To achieve micromixing at the molecular scale, molecular diffusion is still relied upon. Thus, the time required for the mixing process in turbulent flow to progress to micromixing is much less than in the laminar flow case. In conventional trough mixing devices, the shear forces experienced by the fluid in the vicinity of the impeller are high, combined with a large reynolds effect in the radial discharge flow. Therefore, the liquid and the liquid are dispersed mainly in the region near the stirring impeller.
For most mixing processes, overall, 3 mixing mechanisms of convective diffusion, turbulent diffusion and molecular diffusion exist simultaneously. The turbulent diffusion divides the large-size fluid mass into small-size fluid micro-masses, the convection diffusion brings the fluid micro-masses to all parts in the mixing equipment to achieve macroscopically uniform mixing in the mixing equipment, and the molecular diffusion makes the fluid micro-masses disappear to achieve micromixing.
Homogeneous liquid and liquid mixing, namely, the fluids participating in the homogeneous liquid and liquid mixing are necessarily mutually soluble liquids. The micromixing is usually achieved by a stirring operation. There is no phase interface between the miscible liquids, and in the mixing process, the requirement for the shearing speed of the flowing materials is not high, but the sufficient convection circulation is required. For conventional stirring equipment, the fluid is required to flow without dead angles and short circuits, and all the fluid in the stirring equipment flows uniformly, and meanwhile, the fluid flow is required to reach a certain turbulence degree, so that the materials can be fully mixed in a short time. In homogeneous liquid-liquid mixing, the two fluids are first combined with each other in the form of lumps which are progressively broken up and reduced as the stirring progresses, but each lump is still of the same material, which is in fact the macro-mixing process mentioned above. In the macro-mixing process, the molecular-scale interdiffusion of the two material masses has actually begun, but this diffusion process is less dominant than the process in which the masses are broken down and become smaller. When the stirring is continued after the lumps of material are sufficiently small, a molecular-weight diffusion process between the two lumps of material begins to dominate, which is the micromixing process mentioned above. It is during the micromixing process that the uniform blending of the two materials is ultimately accomplished. The process of achieving micro-uniformity between two mutually soluble fluids through mixing can be generally divided into two steps, namely, the first step of dispersing the fluids into micelles with different scales by means of bulk flow and turbulent pulsation, and the second step of collision and coalescence among the micelles and molecular diffusion in the micelles. Such systems can achieve uniform mixing on a molecular scale by mere molecular diffusion, provided that the time elapsed is sufficiently long. The action of the bulk flow and turbulence pulsation is to shorten the time required for achieving micro-uniform mixing, but the theory of turbulence shows that the violent turbulence can only break the fluid into micro-clusters, and the micro-mixing at molecular scale needs molecular diffusion.
Enter the cyclone cavity tangentially and collide with each other to generate collision fluid. In the aspect of process strengthening, the fluid mixing mechanism is effective when the fluid enters the cyclone cavity tangentially and collides with each other head-on. The tangential entering of the fluid cyclone cavity and the impact of the head-on collision can realize the alternate rapid mixing and mass transfer, the tangential entering of the fluid cyclone cavity and the maximum head-on collision have the advantage of uniform mixing and transfer, and the collision flow of the fluid cyclone cavity and the fluid cyclone cavity can realize the contact and mass transfer of two-phase liquid under the conditions of high dispersion, high turbulence, strong mixing and rapid interface renewal.
In order to obtain good mixing effect, equal amount of fluid is selected for coaxial collision in tangential direction, namely the liquid inlet amount of the two liquid inlet pipes is equal. In the actual operation, the liquid inlet amount is determined by the process.
The above mixing all generate a small amount of chlorine dioxide, so that gas phase is necessary to be involved to ensure the safety during mixing.
Specifically, the macro-mixing of the liquid and liquid mixture is improved to micro-uniform mixing.
The liquid-liquid mixing process of the invention mainly comprises the following steps:
(1) laminar flow mixing and turbulent flow mixing disperse fluid into micro-clusters with different sizes by means of main flow and turbulent flow pulsation during rotary collision;
(2) during the rotary collision, 3 mixing mechanisms of convection diffusion, turbulent diffusion and molecular diffusion exist simultaneously, and meanwhile, the collision and coagulation among the micro-clusters and the molecular diffusion in the micro-clusters also exist simultaneously;
(3) the bulk flow and turbulent pulsation act to greatly reduce the time required to achieve microscopically uniform mixing.
(4) All the above processes generate chlorine dioxide, and air must be used.
The invention has the following beneficial effects through improvement:
the device makes liquid and liquid reach micro-mixing due to the adoption of rotational flow collision, and creates a gas-liquid enhanced contact process for efficiently preparing chlorine dioxide.
Overview of the micromixing of the capsule wall-so-called micromixing refers to the process of local homogenization of the material within the device on a molecular scale. The micro-mixing process of liquid and liquid mixed in the rotary collision cavity is a process of mutual mixing of liquid microelements formed by dispersing the liquid by rotary collision until the liquid is uniform on a molecular scale.
⒊ the liquid after the micro-mixing by the rotational flow collision settles at the bottom of the premixing cavity, and rises from the bottom of the premixing cavity to the overflow hole of the overflow hole pipe, at this time, the liquid and liquid premixing effect is achieved, and the liquid falls down into the mixed liquid collecting cylinder after passing through the overflow hole.
⒋ when the liquid enters the mixed liquid collecting cylinder, the mixed liquid falls into the semi-sphere on the top of the siphon cover tube of the mixed liquid collecting cylinder again to collide and collect in the collecting cylinder, when the liquid level in the cylinder rises to generate siphon, the siphon is generated instantly and is discharged into the chlorine dioxide strengthening reactor to prepare chlorine dioxide.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a premixing reaction gas-collecting cup of the present invention;
FIG. 3 is a schematic view of the liquid inlet end face of a premixing reaction gas-collecting cup of the present invention;
FIG. 4 is a schematic view of a pre-mix reaction gas collection cup of the present invention having a chlorate inlet and an acid inlet;
FIG. 5 is a schematic view of the structure of the mixed liquid collecting cylinder of the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a liquid-liquid two-phase mixing device of a chlorine dioxide strengthening reactor through improvement, which comprises a premixing reaction gas-collecting cup 12 and a mixed liquid collecting cylinder 16;
the mixed liquid collecting cylinder 16 is arranged above and communicated with the chlorine dioxide enhanced reactor 3, a mixed liquid siphon discharge pipe 20 is arranged in the mixed liquid collecting cylinder 16, and the mixed liquid enters the mixed liquid collecting cylinder 16 in a pulsating liquid discharge mode;
the premixing reaction gas collecting cup 12 is arranged above and communicated with the mixed liquid collecting cylinder 16, a premixing cavity 4 is arranged in the premixing reaction gas collecting cup 12, a premixing liquid overflow hole pipe 6 is arranged in the premixing cavity 4, and the premixed liquid is placed in a siphon mode and enters the mixed liquid collecting cylinder 16 through the premixing liquid overflow hole pipe 6;
the premixing reaction gas collection cup 12 is provided with a chlorate liquid inlet 1 and an acid liquid inlet 2 which are positioned on the same plane, chlorate liquid enters the premixing cavity 4 from the chlorate liquid inlet 1 in a left-handed rotary motion, and acid liquid enters the premixing cavity 4 from the acid liquid inlet 2 in a right-handed rotary motion, so that the chlorate liquid and the acid liquid are collided in a head-on manner to complete premixing.
In this embodiment, a central air supply nozzle 7 axially penetrates through the premixing reaction air collection cup 12, a bypass hole 73 for allowing air to enter the premixing cavity 4 is formed in the central air supply nozzle 7, and the lower end of the central air supply nozzle 7 is communicated to the mixed liquid collecting cylinder 16.
In this embodiment, an air inlet pipe 21 and a chlorine dioxide outlet pipe 14 are also included,
the air inlet pipe 21 is respectively communicated with the central air supply spray pipe 7 and the chlorine dioxide strengthening reactor and provides air for the premixing cavity 4, the mixed liquid collecting cylinder 16 and the chlorine dioxide strengthening reactor;
the chlorine dioxide discharge pipe 14 is respectively communicated with the premixing cavity 4, the mixed liquid collecting barrel 16 and the chlorine dioxide strengthening reactor to discharge chlorine dioxide.
In this embodiment, an overflow hole pipe 6 located in the premixing chamber 4 is disposed on the periphery of the center air supply nozzle 7, a reserved overflow channel 91 is formed between the center air supply nozzle 7 and the overflow hole pipe 6 through the premixing chamber core 5, a circle of overflow hole pipe orifices 62 are disposed on the overflow hole pipe 6, an overflow hole pipe cover 9 located outside the overflow hole pipe orifices 62 is fixedly disposed on the periphery of the overflow hole pipe 6, and a premixing siphon channel is formed between the overflow hole pipe cover 9 and the overflow hole pipe 6.
In this embodiment, the bottom of the central air supply nozzle 7 is provided with a nozzle reducing portion 71 for allowing air to better enter the premixing chamber 4, and the bottom of the overflow orifice pipe 6 is provided with an orifice pipe reducing portion 61 for forcing the mixed liquid to be microscopically uniform and then to fall into the mixed liquid collecting barrel 16.
The lower part of the premixing reaction gas-collecting cup 12 is a conical part 1 with the diameter gradually reduced so that the premixing liquid can better enter the premixing siphon channel, and the lower end of the conical part 1 is provided with a premixing cavity lower blocking core 24.
In this embodiment, a gas permeable plate 11 positioned at the upper part of the premixing cavity 4 is installed in the premixing reaction gas-collecting cup 12, a chlorine dioxide gas permeable hole 13 is opened on the gas permeable plate 11, and the chlorine dioxide discharge pipe 14 is communicated with the upper part of the gas permeable plate 11; a sealing plate 3.20 is arranged at the end part of the premixing reaction gas-collecting cup 12.
In this embodiment, a mixed liquid siphon cover 18 covering the mixed liquid siphon discharge pipe 20 is provided in the mixed liquid collection cylinder 16, a lower siphon passage is formed between the mixed liquid siphon cover 18 and the mixed liquid siphon discharge pipe 20, and a lower hole 19 is provided at a lower portion of the mixed liquid siphon cover 18. The lower part of the mixed liquid collecting barrel 16 is a lower bottom plate 162, and a mounting groove for mounting the mixed liquid siphon cover 18 is formed on the lower bottom plate.
In this embodiment, the mixed liquor siphon discharge pipe 20 has a liquid-tight elbow 23 at the lower portion thereof, which is located between the mixed liquor collection canister 16 and the liquid inlet of the chlorine dioxide fortification reactor 3.
In this embodiment, the top of the mixture siphon hood 18 is a siphon hood sealing plate, and a hemisphere 22 for making the premixed liquid enter the mixture collecting barrel 16 more uniformly is disposed above the siphon hood sealing plate 181.
In this embodiment, the mixed liquid collecting cylinder 16 has an upper end opened with an installation opening 161 for installing the pre-mixing reaction gas-collecting cup 12, and a joint 25 connected to the chlorine dioxide discharge pipe 14 is installed on the outer wall of the mixed liquid collecting cylinder 16.
In use, as shown in fig. 2-4, the chlorate solution is rotated within the premix chamber by entering the feed premix cup 4 through the chlorate solution inlet port 1 and by levogyration. The acid liquor enters the feeding premixing cup body through the acid liquor inlet 2 in a right-handed mode and rotates in the premixing cavity. Chlorate solution and acid liquor rotate in the premixing cavity to collide frontwards, the collided premixing liquid continues to rotate and settle to the top of the bottom plugging center 24 of the premixing cavity at the bottom of the feeding premixing cup body, the collided premixing liquid is settled and rises along the overflow hole pipe 6 until the overflow hole pipe orifice 62 overflows and is discharged, the collided mixed liquid is limited by the overflow hole pipe cover 9 and cannot directly overflow from the overflow hole pipe orifice 62, the collided mixed liquid enters the overflow hole pipe cover 9 and rises to the overflow hole pipe orifice 62 to be discharged and falls, the mixed liquid vertically falls and flows downwards in a gap 91 between the overflow hole pipe 6 and the central air supply spray pipe 7, and the mixed liquid is influenced by the hole pipe reducing part 61 when the mixed liquid vertically falls so as to be separated uniformly. The central air supply nozzle 7 is provided with 73 and a nozzle reducing portion 71 which supply dilution air to the premixing chamber 4 and the next process, respectively, the nozzle reducing portion 71 allowing more dilution air to enter the premixing chamber 4. A small amount of chlorine dioxide gas is generated due to the rotational flow collision, and the gas is discharged into the premixing reaction gas collection cup through the chlorine dioxide air holes 13 formed in the air permeable plate 11 and then enters the chlorine dioxide discharge pipe 14 to be discharged.
As shown in fig. 5, the mixed liquid mixed from the swirling collision vertically falls into the mixed liquid collecting barrel 16 from the mounting opening 161 of the upper sealing plate and is collected, and the mixed liquid collecting barrel is internally provided with a siphon cover 18; the siphon cover 18 is fixed on the annular mounting groove of the lower base plate 162, the joint of the siphon cover 18 and the lower base plate is provided with a lower hole 19 for mixed liquid to enter the siphon cover 18, a liquid siphon cover sealing plate 181 on the top of the siphon cover and a hemisphere 22 form two separated cavities inside and outside the siphon cover, when the mixed liquid falls into the mixed liquid collecting cylinder 16, the external pressure of the siphon cover 18 is increased along with the increase of the falling liquid, the mixed liquid is pressed into the space in the cover in the extruding cover through the lower hole 19, the liquid level in the cover moves upwards in parallel, when the liquid level moves to the mouth of the mixed liquid siphon discharge pipe 20, the mixed liquid can flow into the mixed liquid siphon discharge pipe, when the liquid level moves upwards in the space in the extruding cover, air can be extruded from the liquid seal position of the elbow 23 at the lower part of the mixed liquid siphon discharge pipe, the liquid seal at the part of the elbow is thinnest, when the space in the cover is extruded to the minimum, the mixed liquid instantly flows into the mixed liquid seal of the mixed liquid discharge pipe 20 to break the elbow and is extruded, because the density of the liquid is greater than that of the air, when the liquid flows into the mixed liquid siphon discharge pipe 20, instant vacuum is generated, the pressure difference between the inside and outside of the cover of the mixed liquid siphon cover is generated, the pressure outside the cover is higher than the pressure inside the cover, so that the siphon phenomenon is generated, when the liquid outside the cover falls to the lower hole 19, the pressure difference between the inside and the outside of the cover is broken, the inside and the outside of the cover are balanced, the siphon is stopped, the mixed liquid is collected for the second time until the mixed liquid is siphoned again, and the pulsating liquid discharge is completed.
The liquid-liquid two-phase chlorate solution and acid solution enter the rotating cavity body tangentially, and collide with each other to generate collision fluid, so that the collision fluid has the greatest advantage of realizing alternate rapid mixing and mass transfer. The collision flow formed by the mutual collision of the two liquid phases can realize the contact and mass transfer of the two-phase liquid under the conditions of high dispersion, high turbulence, strong mixing and quick update of an interface.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A chlorine dioxide strengthens reactor liquid, two-phase mixing arrangement of liquid which characterized in that: comprises a premixing reaction gas collection cup and a mixed liquid collection cylinder;
the mixed liquid collecting cylinder is arranged above and communicated with the chlorine dioxide enhanced reactor, a mixed liquid siphon discharge pipe is arranged in the mixed liquid collecting cylinder, and the mixed liquid enters the mixed liquid collecting cylinder in a pulsating liquid discharge mode;
the premixing reaction gas collecting cup is arranged above the mixed liquid collecting cylinder and communicated with the mixed liquid collecting cylinder, a premixing cavity is arranged in the premixing reaction gas collecting cup, a premixed liquid overflow hole pipe is arranged in the premixing cavity, and premixed liquid is placed in a siphon mode and enters the mixed liquid collecting cylinder through the premixed liquid overflow hole pipe;
the premixing reaction gas collection cup is provided with a chlorate liquid inlet and an acid liquid inlet which are positioned on the same plane, chlorate liquid enters the premixing cavity from the chlorate liquid inlet in a left-handed rotary motion, and acid liquid enters the premixing cavity from the acid liquid inlet in a right-handed rotary motion, so that the chlorate liquid and the acid liquid are collided in a head-on mode to complete premixing.
2. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 1, characterized in that: the premixing reaction gas collection cup is internally provided with a central gas supply spray pipe which axially penetrates through the cup, the central gas supply spray pipe is provided with a bypass hole which can allow air to enter the premixing cavity, and the lower end of the central gas supply spray pipe is communicated to the mixed liquid collecting cylinder.
3. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 2, characterized in that: also comprises an air inlet pipe and a chlorine dioxide discharge pipe,
the air inlet pipe is respectively communicated with the central air supply spray pipe and the chlorine dioxide strengthening reactor and provides air for the premixing cavity, the mixed liquid collecting cylinder and the chlorine dioxide strengthening reactor;
the chlorine dioxide discharge pipe is respectively communicated with the premixing cavity, the mixed liquid collecting barrel and the chlorine dioxide strengthening reactor to discharge chlorine dioxide.
4. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 2, characterized in that: the periphery of the central air supply spray pipe is provided with an overflow hole pipe positioned in the premixing cavity, a reserved overflow channel is formed between the central air supply spray pipe and the overflow hole pipe, the overflow hole pipe is provided with a circle of overflow hole pipe orifices, the periphery of the overflow hole pipe is fixedly provided with an overflow hole pipe cover positioned outside the overflow hole pipe orifices, and a premixing siphon channel is formed between the overflow hole pipe cover and the overflow hole pipe.
5. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor as claimed in claim 4, wherein: the bottom of center air feed spray tube is provided with the spray tube undergauge portion that lets the air better get into the premix cavity, the bottom of overflow hole pipe is provided with the hole pipe undergauge portion that falls into the mixed liquid collecting vessel behind the mixed liquid microcosmic even of force.
6. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor as claimed in claim 4, wherein: a ventilating plate positioned at the upper part of the premixing cavity is arranged in the premixing reaction gas collection cup, a chlorine dioxide ventilating hole is formed in the ventilating plate, and the chlorine dioxide discharge pipe is communicated above the ventilating plate; and a sealing plate is arranged at the end part of the premixing reaction gas collection cup.
7. A liquid-liquid two-phase mixing device for a chlorine dioxide enhanced reactor according to claim 3, wherein: the mixed liquid collecting cylinder is internally provided with a mixed liquid siphon cover covering the mixed liquid siphon discharge pipe, a lower siphon channel is formed between the mixed liquid siphon cover and the mixed liquid siphon discharge pipe, and the lower part of the mixed liquid siphon cover is provided with a lower hole.
8. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 7, characterized in that: the lower part of the mixed liquid siphon discharge pipe is provided with a liquid-sealed elbow pipe which is positioned between the mixed liquid collecting cylinder and the liquid inlet of the chlorine dioxide strengthening reactor.
9. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 7, characterized in that: the top of mixed liquid siphon cover is liquid siphon cover shrouding, is provided with the hemisphere that lets the premix liquid more evenly get into mixed liquid collecting barrel above this liquid siphon cover shrouding.
10. The liquid-liquid two-phase mixing device of the chlorine dioxide enhanced reactor according to claim 7, characterized in that: the upper end of the mixed liquid collecting cylinder is provided with an installation opening for installing a premixing reaction gas collecting cup, and the outer wall of the mixed liquid collecting cylinder is provided with a joint communicated with a chlorine dioxide discharge pipe.
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| CN202210014128.8A CN114259972B (en) | 2022-01-07 | 2022-01-07 | Liquid-liquid two-phase mixing device of chlorine dioxide strengthening reactor |
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Cited By (1)
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| CN114522648A (en) * | 2022-04-08 | 2022-05-24 | 攀枝花攀钢集团设计研究院有限公司 | Mixing reactor for automatically and rapidly mixing solution and construction method |
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