CN114259972B - Liquid-liquid two-phase mixing device of chlorine dioxide strengthening reactor - Google Patents
Liquid-liquid two-phase mixing device of chlorine dioxide strengthening reactor Download PDFInfo
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- CN114259972B CN114259972B CN202210014128.8A CN202210014128A CN114259972B CN 114259972 B CN114259972 B CN 114259972B CN 202210014128 A CN202210014128 A CN 202210014128A CN 114259972 B CN114259972 B CN 114259972B
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- 239000007788 liquid Substances 0.000 title claims abstract description 235
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 238000002156 mixing Methods 0.000 title claims abstract description 108
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 75
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 75
- 238000005728 strengthening Methods 0.000 title claims abstract description 37
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 48
- 239000012495 reaction gas Substances 0.000 claims abstract description 25
- 239000002253 acid Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 abstract description 40
- 238000012546 transfer Methods 0.000 abstract description 9
- 239000006185 dispersion Substances 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 description 32
- 238000000034 method Methods 0.000 description 25
- 230000008569 process Effects 0.000 description 23
- 239000012071 phase Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000693 micelle Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
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- 230000005540 biological transmission Effects 0.000 description 4
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- 238000004581 coalescence Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
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- 230000005501 phase interface Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000010008 shearing Methods 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 the chlorine dioxide strengthening reactor and is communicated with the chlorine dioxide strengthening 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 make chlorate liquid and acid liquid enter the rotary cavity tangentially at the same time, the head-on collision generates collision fluid, the collision fluid formed by the collision of the chlorate liquid and the acid liquid can make the two-phase liquid realize contact and mass transfer under the conditions of high dispersion, high turbulence, strong mixing and rapid interface update, and the mixing of the two liquids is completed.
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 yellow-green to orange-yellow gas, and is a fourth generation green disinfection product recognized by the international health organization as being environment-friendly, safe and nontoxic.
The preparation of chlorine dioxide is the result of liquid, gas reactions. In general, chlorate solution is one phase, acid solution is the other phase, when chlorine dioxide is prepared, small amount of chlorine dioxide is generated by premixing liquid and liquid, and the chlorine dioxide has the characteristics of being relatively active and explosive and 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 domestic chlorine dioxide production enterprises basically have different formulas, reaction temperatures and pressures of reaction raw materials, but have different raw material mixing modes, and are summarized as mechanical stirring and mixing, air stirring and mixing, tower type falling and mixing, multi-tooth subdivision mixing, gallery curved flow mixing and the like. However, all these mixing modes belong to the macroscopic mixing range, and it is difficult to achieve the microscopic uniform mixing effect.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides a liquid-liquid two-phase mixing device of a chlorine dioxide strengthening reactor, which well solves the problem of microcosmic uniform mixing of chlorine dioxide reaction raw materials.
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 liquor collecting cylinder is arranged above the chlorine dioxide strengthening reactor and communicated with the chlorine dioxide strengthening reactor, a mixed liquor siphon discharge pipe is arranged in the mixed liquor collecting cylinder, and the mixed liquor enters the mixed liquor collecting cylinder in a pulsating liquid discharge mode;
the premixing reaction gas collection cup is arranged above the mixed liquid collection cylinder and communicated with the mixed liquid collection cylinder, a premixing cavity is arranged in the premixing reaction gas collection cup, a premixing liquid overflow hole pipe is arranged in the premixing cavity, and the premixing liquid enters the mixed liquid collection cylinder through the premixing liquid overflow hole pipe in a siphon mode;
The premixing reaction gas-collecting cup is provided with a chlorate liquid inlet and an acid liquid inlet which are positioned on the same plane, the chlorate liquid enters the premixing cavity from the chlorate liquid inlet in a left-hand rotary motion, and the acid liquid enters the premixing cavity from the acid liquid inlet in a right-hand rotary motion, so that the chlorate liquid and the acid liquid are premixed by head-on collision.
Preferably, a central air supply spray pipe penetrates through the inner shaft of the premixing reaction gas collection cup, a bypass hole capable of enabling 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;
And the chlorine dioxide discharge pipe is respectively communicated with the premixing cavity, the mixed liquid collecting cylinder and the chlorine dioxide strengthening reactor to realize the discharge of chlorine dioxide.
Preferably, an overflow hole pipe positioned in the premixing cavity is arranged at 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 a premixing cavity in a plugging manner, a circle of overflow hole pipe orifices are formed in the overflow hole pipe, an overflow hole pipe cover positioned outside the overflow hole pipe orifices is fixedly arranged at the periphery of the overflow hole pipe, and a premixing siphon channel is formed between the overflow hole pipe cover and the overflow hole pipe.
Preferably, the bottom of the central air supply spray pipe is provided with a spray pipe diameter reducing part for enabling air to better enter the premixing cavity 4, and the bottom of the overflow hole pipe is provided with a hole pipe diameter reducing part for forcing the mixed liquid to fall into the mixed liquid collecting cylinder after being microscopically uniform.
The lower part of the premixing reaction gas collection cup is a conical part with the diameter gradually reduced to enable the premix liquid to 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 ventilation plate positioned at the upper part of the premixing cavity is arranged in the premixing reaction gas collection cup, a chlorine dioxide ventilation hole is formed in the ventilation plate, and the chlorine dioxide discharge pipe 14 is communicated with the upper part of the ventilation plate; 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 arranged at the lower part 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 the mixed liquid siphon cover.
Preferably, the lower part of the mixed liquor siphon discharge pipe is provided with a liquid seal bent pipe, and the bent pipe is positioned between the mixed liquor collecting cylinder and the liquid inlet of the chlorine dioxide strengthening reactor.
Preferably, the top of the mixed liquor siphon cover is provided with a liquor siphon cover sealing plate, and a hemisphere for enabling the premixed liquor to enter the mixed liquor collecting cylinder more uniformly is arranged above the liquor siphon cover sealing plate.
Preferably, the upper end of the mixed liquor collecting cylinder is provided with a mounting opening for mounting the gas collecting cup for the premixing reaction, and simultaneously, the outer wall of the mixed liquor collecting cylinder is provided with a connector communicated with the chlorine dioxide discharge pipe.
When the device is used, chlorate liquid and acid liquid enter the rotating cavity tangentially at the same time, collision fluid is generated by head-on collision, and the chlorate liquid and the acid liquid are respectively; the liquid and the liquid enter tangentially at the inlet of the rotary cavity at the speed of 10-15 m/s, the entering directions of the liquid and the liquid are tangential to each other, namely, the two directions of rotation are opposite, after the two fluids enter from the chlorate liquid inlet and the acid liquid inlet at equal speed and equal quantity respectively, the two fluids are ejected to form jet flow and collide to form a circular (fan) film (fog) surface perpendicular to the jet flow direction, the two fluids are mixed to a certain degree, swirling motion is formed in the rotary cavity and collide, and the two-phase liquid can realize contact and mass transfer under the conditions of high dispersion, high turbulence, strong mixing and interface rapid update through the collision flow formed by the two fluids.
The principle of the invention is summarized as follows:
The liquid and the liquid are contacted and reacted,
The application of the rotating gravity reaction technology to the preparation of chlorine dioxide is originally proposed to be based on the enhancement of the gas-liquid contact process, and the related aspects are only limited in the aspect of the transmission of gas and liquid phases. However, no technology for enhancing the transfer between liquid and liquid phases is known. Based on the basis of our years of chlorine dioxide preparation, the liquid distributor for preparing the chlorine dioxide by gas-liquid contact is found to have obvious effect on liquid-liquid contact mixing after being improved. From the angles of strengthening the transmission process and micromixing, a novel mechanism for strengthening the liquid-liquid mixing and contacting process is provided, namely tangential entry into a rotary cavity, collision fluid is generated by head-on collision, and the transmission strengthening of gas-liquid phase is expanded to the transmission strengthening of liquid-gas phase. And the research and test work is carried out on the aspects of liquid-liquid microscopic mixing, liquid-liquid reaction characteristics and the like.
Micromixing of liquids is one of the most effective methods of enhancing the transfer of chlorine dioxide to liquids and liquids. Has obvious effect on effectively strengthening the reaction characteristics of preparing chlorine dioxide and liquid.
Micro-mixing, namely mixing phenomena can be divided into macro-mixing and micro-mixing according to the scale of mixing. Macroscopic mixing refers to the phenomenon of large scale mixing, such as in stirred mixing, where the fluid is caused to circulate on the equipment scale due to mechanical stirring, thereby mixing the fluid on the equipment scale. Micromixing refers to the process of breaking up fluid into micro-clusters by small-scale turbulent flow, collisions, coalescence and redispersion between micro-clusters, and achieving uniformity of molecular dimensions of liquid, 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 phase and the liquid phase also directly influences the conversion rate and the productivity of the chlorine dioxide reaction.
The mixing is a process of achieving uniform molecular level finally through main diffusion, vortex diffusion and molecular diffusion under the action of forced convection. When mixing, large-scale vortex micro-clusters are formed first, under the action of turbulent stretching and shearing, the large vortex is split into smaller-scale vortices, energy is transferred from the large vortex to the small vortex, and the small vortex is transferred to the smaller vortex until the smaller-scale vortex. This process shows that mixing will first start from large scale convective motion, followed by small scale, i.e. vortex diffusion will further deform and split larger droplet micelles into smaller micelles, reducing the degree of non-uniformity to the size of the vortex itself by vortex diffusion between the small micelle interfaces, until the scale is reached, which is the maximum of macroscopic mixing. Micromixing is mixing on a molecular scale, and the final implementation of micromixing can only depend on molecular diffusion in micro-clusters on the minimum scale, and the molecular diffusion is a control factor for achieving micromixing.
In liquid mixing, there are two necessary elements to achieve mixing, one is to have a bulk convective flow to ensure that no quiescent zone is present within the device, and the other is to have a strong or high shear mixing zone that can provide conditions to achieve the mixing requirements for reduced uniformity or enhanced process rates.
Liquid mixing can be classified into laminar mixing and turbulent mixing.
① Laminar mixing, in which under laminar conditions, the inertial forces are rapidly reduced by the viscosity of the fluid, the viscous forces act as dominant, which causes a great velocity gradient in the boundary layer of the flowing liquid, these being laminar regions with high shear rates, which cause deformation and stretching of the fluid elements, the volume of which gradually decreases, and the final homogenization of the miscible liquid being achieved only by molecular diffusion. In laminar mixing, molecular diffusion is always present, but the specific surface area is not large enough to make the diffusion rate an important factor before the fluid element becomes small enough. In laminar mixing, the fluid cells themselves decrease in size as mixing proceeds, while the concentration differences between the different fluid cells also decrease due to molecular diffusion, in large part because the area available for diffusion increases with decreasing fluid cell size. Thus, laminar mixing is closely related to the interfacial contact area.
② Turbulent mixing-in a conventional mixing apparatus, the bulk fluid flow is turbulent. Due to the action of external force, turbulent vortex diffusion is generated in the flowing process of the fluid, and the mixing speed caused by the vortex diffusion is much higher than that caused by a laminar flow mechanism. Molecular diffusion is still relied upon to achieve microscopic mixing at the molecular scale. Thus, the time required for the mixing process in turbulent flow to progress to micromixing is much less than in laminar flow. In conventional tank mixing devices, the fluid is subjected to high shear forces near the impeller, coupled with the large reynolds effect in the radially discharged liquid stream. Therefore, the liquid and the liquid are dispersed mainly in the vicinity of the stirring impeller.
For most mixing processes, the 3 mixing mechanisms of convection diffusion, turbulent diffusion and molecular diffusion are generally simultaneous. Turbulent diffusion divides large-size fluid clusters into smaller-size fluid micro-clusters, and generally, convection diffusion brings the fluid micro-clusters to all positions in the mixing equipment to achieve macroscopic uniform mixing in the mixing equipment, and molecular diffusion disappears the fluid micro-clusters to achieve microscopic mixing.
Homogeneous liquid and liquid mixing, the fluids involved in the homogeneous liquid and liquid mixing are necessarily mutually soluble liquids. Micromixing is typically achieved by a stirring operation. There is no phase interface between the miscible liquids, and during mixing, the shear rate requirements for material flow are not high, but sufficient convection circulation is required. For conventional stirring equipment, the fluid flow is required to have no dead angle and no short circuit, the fluid in the stirring equipment is uniformly flowing everywhere, and meanwhile, the fluid flow is required to reach a certain turbulence degree, so that 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 clusters which are gradually broken up and become smaller as stirring proceeds, but each cluster is still the same material, which is in fact the macroscopic mixing process mentioned above. In the macro-mixing process, inter-diffusion of molecular weight levels of the two material clusters has actually started, except that this diffusion process is less dominant than the process in which clusters are broken down and become smaller. When the mass of material is sufficiently small, the stirring proceeds, and the diffusion process of molecular level between the two mass of material starts to dominate, which is the aforementioned micromixing process. It is during the micromixing process that the uniform blending of the two materials is accomplished. The process of achieving microscopic uniformity between two miscible fluids by mixing can generally be divided into two steps, the first step being the dispersion of the fluid into micelles of different dimensions by means of bulk flow, turbulent pulsations, and the second step being the collision, coalescence and molecular diffusion within the micelles between these micelles. Such systems rely on molecular diffusion alone to achieve uniform mixing on a molecular scale, provided that the time elapsed is long enough. The main flow and the turbulence pulsation have the effect of greatly shortening the time required for achieving micro uniform mixing, but the turbulence theory proves that the intense turbulence can only break the fluid into micro-clusters, and the micro-mixing of the molecular scale is achieved and the molecular diffusion is needed.
Enters the cyclone cavity tangentially, and collides with the head on to generate collision fluid. In the process reinforcement aspect, the fluid enters the cyclone cavity tangentially, and the collision fluid mixing mechanism generated by the head-on collision is more effective. The tangential direction enters the cyclone cavity, the head-on collision generates collision fluid, the greatest advantage of the collision fluid is that the rapid mixing and mass transfer between phases can be realized, the tangential direction enters the cyclone cavity, one of the greatest advantages of the head-on collision is that the mixing and the transfer are uniform, and the contact and the mass transfer of the two-phase liquid can be realized under the conditions of high dispersion, high turbulence, strong mixing and rapid interface update through the collision flow of the two.
In order to obtain a good mixing effect, the same amount of fluid is selected to coaxially collide in tangential entry, namely the liquid inlet amounts of the two liquid inlet pipes are equal. In the actual operation, the liquid inlet amount is determined by the process.
The above mixing produces a small amount of chlorine dioxide, so that the gas phase must participate to ensure the safety during mixing.
Specifically, the macro mixing of liquid and liquid mixture is improved to micro uniform mixing.
The liquid and liquid mixing process mainly comprises the following steps:
(1) Laminar flow mixing and turbulent flow mixing disperse fluid into micro-clusters with different dimensions by means of main flow and turbulent flow pulsation during rotary collision;
(2) In the case of a spin collision, 3 mixing mechanisms of convection diffusion, turbulence diffusion and molecular diffusion are simultaneous, and at the same time, collisions, coalescence between the micelles and molecular diffusion within the micelles are also simultaneous;
(3) The effect of the bulk flow and turbulence pulsations is to significantly shorten the time required to achieve microscopic uniform mixing.
(4) The above processes all generate chlorine dioxide and air must be involved.
The invention has the following beneficial effects by improvement:
⒈ Because of adopting the cyclone collision, the liquid and the liquid are mixed microscopically, and a gas-liquid strengthening contact process is created for preparing the chlorine dioxide with high efficiency.
⒉ Overview of micromixing by micromixing is meant the process of localized homogenization of the substances 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 mixing liquid microelements formed by the dispersion of liquid by rotary collision until the liquid is uniform in molecular scale.
⒊ The liquid after the swirling flow collides with the microscopic mixing is settled at the bottom of the premixing cavity, and rises to the overflow hole of the overflow hole pipe from the bottom of the premixing cavity, so that the liquid and liquid premixing effect is achieved, and falls down into the mixed liquid collecting cylinder after passing through the overflow hole.
⒋ When the liquid after the microscopic mixing is collided by the rotational flow enters the mixed liquid collecting cylinder, the mixed liquid falls down again to the hemispherical collision at the top end of the mixed liquid siphon cover pipe in the mixed liquid collecting cylinder and is collected in the collecting cylinder, and when the liquid level in the cylinder rises to the level capable of generating siphonage, siphonage is instantaneously generated and 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 view of the structure of a gas collection cup for premixing reaction according to the present invention;
FIG. 3 is a schematic view of the liquid inlet end face of the gas collection cup for the premixing reaction according to the present invention;
FIG. 4 is a schematic illustration of a premix reaction gas bowl of the present invention having a chlorate inlet port and an acid inlet port;
FIG. 5 is a schematic view of the structure of the mixing liquid collecting cylinder of the invention.
Detailed Description
The following detailed description of the present invention will provide clear and complete description of the technical solutions of the embodiments of the present invention, with reference to fig. 1-5, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a chlorine dioxide strengthening reactor liquid-liquid two-phase mixing device by improvement, which comprises a premixing reaction gas collecting cup 12 and a mixed liquid collecting cylinder 16;
The mixed liquor collecting cylinder 16 is arranged above and communicated with the chlorine dioxide strengthening reactor 3, a mixed liquor siphon discharge pipe 20 is arranged in the mixed liquor collecting cylinder 16, and the mixed liquor enters the mixed liquor collecting cylinder 16 in a pulsating liquid discharge mode;
The premixing reaction gas collection cup 12 is arranged above and communicated with the mixed liquid collection cylinder 16, a premixing cavity 4 is arranged in the premixing reaction gas collection cup 12, a premixing liquid overflow hole pipe 6 is arranged in the premixing cavity 4, and the premixing liquid enters the mixed liquid collection cylinder 16 through the premixing liquid overflow hole pipe 6 in a siphon mode;
The premixing reaction gas-collecting cup 12 is provided with a chlorate liquid inlet 1 and an acid liquid inlet 2 which are positioned on the same plane, the chlorate liquid enters the premixing cavity 4 from the chlorate liquid inlet 1 in a left-hand rotating motion, and the acid liquid enters the premixing cavity 4 from the acid liquid inlet 2 in a right-hand rotating motion, so that the chlorate liquid and the acid liquid are premixed by head-on collision.
In this embodiment, a central air supply nozzle 7 is axially penetrated in the premixing reaction gas collection cup 12, a bypass hole 73 capable of 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 with a mixed liquid collection cylinder 16.
In this embodiment, further comprising an air inlet pipe 21 and a chlorine dioxide outlet pipe 14,
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 liquor 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 liquor collecting cylinder 16 and the chlorine dioxide strengthening reactor to realize the discharge of chlorine dioxide.
In this embodiment, an overflow hole pipe 6 located in the premixing cavity 4 is arranged at the periphery of the central air supply spray pipe 7, a reserved overflow channel 91 is formed between the central air supply spray pipe 7 and the overflow hole pipe 6 through the premixing cavity blanking plug 5, a circle of overflow hole pipe orifice 62 is formed in the overflow hole pipe 6, an overflow hole pipe cover 9 located outside the overflow hole pipe orifice 62 is fixedly arranged at 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 diameter-reducing portion 71 for better air entering the premixing cavity 4, and the bottom of the overflow hole pipe 6 is provided with a hole pipe diameter-reducing portion 61 for forcing the mixed liquid to fall into the mixed liquid collecting cylinder 16 after being microscopically uniform.
The lower part of the premixing reaction gas collecting cup 12 is provided with a conical part 10 with gradually reduced diameter, so that the premix liquid better enters the premixing siphon channel, and the lower end of the conical part 10 is provided with a premixing cavity lower plug 24.
In this embodiment, a ventilation plate 11 located at the upper part of the premixing cavity 4 is installed in the premixing reaction gas-collecting cup 12, a chlorine dioxide ventilation hole 13 is formed in the ventilation plate 11, and the chlorine dioxide discharge pipe 14 is communicated with the upper part of the ventilation plate 11; a closing plate is arranged at the end part of the premixing reaction gas collection cup 12.
In this embodiment, a mixed liquid siphon cover 18 covering a mixed liquid siphon discharge pipe 20 is provided in the mixed liquid collection tube 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 in a lower portion of the mixed liquid siphon cover 18. A lower plate 162 is provided at the lower part of the mixing liquid collecting cylinder 16, and a mounting groove for mounting the mixing liquid siphon cover 18 is provided in the lower plate.
In this embodiment, the lower part of the mixed liquor siphon discharge pipe 20 is provided with a liquid-tight elbow pipe 23 which is positioned between the mixed liquor collection cylinder 16 and the inlet of the chlorine dioxide strengthening reactor 3.
In this embodiment, the top of the mixing liquid siphon bell 18 is a liquid siphon bell plate, and a hemisphere 22 is provided above the liquid siphon bell plate 181 to allow the pre-mixture to more evenly enter the mixing liquid collection barrel 16.
In this embodiment, the upper end of the mixing liquid collecting cylinder 16 is provided with a mounting opening 161 for mounting the premixing reaction gas collecting cup 12, and a joint 25 connected to the chlorine dioxide discharge pipe 14 is mounted on the outer wall of the mixing liquid collecting cylinder 16.
In use of this embodiment, as shown in figures 2-4, the chlorate solution is left-handed by screwing from the chlorate solution inlet 1 into the feed premix chamber 4 and rotating within the premix chamber. The acid liquor enters the feeding premixing cup body through the acid liquor inlet 2 in a right-hand screwing way and rotates in the premixing cavity. Chlorate liquid and acid liquor are collided in the premixing cavity in a rotary head-on manner, the collided premixing liquid continuously rotates and settles to the top of the premixing cavity bottom blanking plug 24 at the bottom of the feeding premixing cup body, and is settled and ascended 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, but enters and ascends to the overflow hole pipe orifice 62 to be discharged and falls by the bottom of the overflow hole pipe cover 9, and falls down vertically in a gap between the overflow hole pipe 6 and the central air supply spray pipe 7, and is influenced by the hole pipe reducing part 61 when the mixed liquid falls down vertically so as to lead the mixed liquid to be separated after being uniformly. The central air supply nozzle 7 is provided with a nozzle reducing part 73 and a nozzle reducing part 71, which respectively supply dilution air to the premixing cavity 4 and the next procedure, and the nozzle reducing part 71 allows more dilution air to enter the premixing cavity 4. A small amount of chlorine dioxide gas is generated due to the cyclone collision, and is discharged into the premixing reaction gas collection cup through the chlorine dioxide ventilation holes 13 formed on the ventilation plate 11 and then enters the chlorine dioxide discharge pipe 14 for discharge.
As shown in fig. 5, the mixed liquid mixed by the cyclone collision falls into the mixing liquid collecting cylinder 16 from the mounting opening 161 on the upper sealing plate to be gathered in the cylinder, and the siphon cover 18 is arranged in the mixing liquid collecting cylinder; the siphon cover 18 is fixed on the annular mounting groove of the lower bottom plate 162, the joint of the siphon cover 18 and the lower bottom plate is provided with a lower hole 19 for allowing mixed liquid to enter the siphon cover 18, the siphon cover 18 is also provided with a liquid siphon cover sealing plate 181 and a hemisphere 22 at the top of the cover to form two cavities inside and outside the cover, when the mixed liquid falls into the mixed liquid collecting cylinder 16, the pressure outside the siphon cover 18 is increased along with the increase of the falling liquid and is pressed into the inner space of the cover through the lower hole 19, the liquid level in the cover is parallel and moves upwards, when the liquid level moves upwards to the orifice of the mixed liquid siphon discharging pipe 20, the mixed liquid can flow into the mixed liquid siphon discharging pipe, when the liquid level moves upwards to press the inner space of the cover, air can be extruded from the liquid seal of the elbow 23 at the lower part of the mixed liquid siphon discharging pipe, the liquid seal of the elbow is thinnest, when the inner space of the cover is pressed to the minimum, the mixed liquid instantaneously flows into the mixed liquid siphon discharging pipe 20 to break the liquid seal of the elbow and is extruded, because the liquid density is higher than air, when the liquid is sucked into the mixed liquid discharging pipe 20, the pressure difference between the inner space and the cover is higher than the outer pressure, the inner pressure of the cover is reduced, the siphon pressure difference is generated, and the siphon phenomenon is reduced again, and the siphon phenomenon is stopped, and the inner and outer pressure is completely.
The liquid-liquid two-phase chlorate liquid and acid liquid enter the rotary cavity tangentially, and head-on collision generates collision fluid which has the greatest advantage of being capable of realizing rapid mixing and mass transfer between phases. Through collision flow formed by the mutual collision of the two, the two-phase liquid can realize contact and mass transfer under the conditions of high dispersion, high turbulence, strong mixing and rapid interface updating.
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 (6)
1. A chlorine dioxide strengthening reactor liquid-liquid two-phase mixing device is characterized in that: comprises a premixing reaction gas collection cup and a mixed liquid collection cylinder;
The mixed liquor collecting cylinder is arranged above the chlorine dioxide strengthening reactor and communicated with the chlorine dioxide strengthening reactor, a mixed liquor siphon discharge pipe is arranged in the mixed liquor collecting cylinder, and the mixed liquor enters the mixed liquor collecting cylinder in a pulsating liquid discharge mode;
the premixing reaction gas collection cup is arranged above the mixed liquid collection cylinder and communicated with the mixed liquid collection cylinder, a premixing cavity is arranged in the premixing reaction gas collection cup, a premixing liquid overflow hole pipe is arranged in the premixing cavity, and the premixing liquid enters the mixed liquid collection cylinder through the premixing liquid overflow hole pipe in a siphon mode;
The premixing reaction gas-collecting 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-hand rotating mode, and acid liquid enters the premixing cavity from the acid liquid inlet in a right-hand rotating mode, so that the chlorate liquid and the acid liquid are premixed by head-on collision;
A central air supply spray pipe penetrates through the inner shaft of the premixing reaction gas 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 with a mixed liquid collecting cylinder;
a mixed liquid siphon cover covered on 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 arranged at the lower part of the mixed liquid siphon cover;
the lower part of the mixed liquid siphon discharge pipe is provided with a liquid-sealed bent pipe, and the bent pipe is positioned between the mixed liquid collection cylinder and the liquid inlet of the chlorine dioxide strengthening reactor;
The top of the mixed liquid siphon cover is provided with a liquid siphon cover sealing plate, and a hemisphere which enables the premixed liquid to more uniformly enter the mixed liquid collecting cylinder is arranged above the liquid siphon cover sealing plate.
2. The chlorine dioxide strengthening reactor liquid-liquid two-phase mixing device according to claim 1, wherein: also comprises an air inlet pipe and a chlorine dioxide outlet 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;
And the chlorine dioxide discharge pipe is respectively communicated with the premixing cavity, the mixed liquid collecting cylinder and the chlorine dioxide strengthening reactor to realize the discharge of chlorine dioxide.
3. The chlorine dioxide strengthening reactor liquid-liquid two-phase mixing device according to claim 2, wherein: 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, a circle of overflow hole pipe orifice is formed in the overflow hole pipe, an overflow hole pipe cover positioned outside the overflow hole pipe orifice is fixedly arranged on the periphery of the overflow hole pipe, and a premixing siphon channel is formed between the overflow hole pipe cover and the overflow hole pipe.
4. A chlorine dioxide enhanced reactor liquid-liquid two-phase mixing device according to claim 3, characterized in that: the bottom of the central air supply spray pipe is provided with a spray pipe diameter reducing part for enabling air to better enter the premixing cavity, and the bottom of the overflow hole pipe is provided with a hole pipe diameter reducing part for forcing the mixed liquid to fall into the mixed liquid collecting cylinder after being microscopically uniform.
5. A chlorine dioxide enhanced reactor liquid-liquid two-phase mixing device according to claim 3, characterized in that: a ventilation plate positioned at the upper part of the premixing cavity is arranged in the premixing reaction gas-collecting cup, a chlorine dioxide ventilation hole is formed in the ventilation plate, and the chlorine dioxide discharge pipe is communicated with the upper part of the ventilation plate; a sealing plate is arranged at the end part of the premixing reaction gas collection cup.
6. The chlorine dioxide strengthening reactor liquid-liquid two-phase mixing device according to claim 1, wherein: the upper end of the mixed liquid collecting cylinder is provided with a mounting opening for mounting the premixed reaction gas collecting cup, and meanwhile, the outer wall of the mixed liquid collecting cylinder is provided with a connector communicated with a chlorine dioxide discharge pipe.
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