CN215233379U - Venturi type multiphase fluid mixer - Google Patents
Venturi type multiphase fluid mixer Download PDFInfo
- Publication number
- CN215233379U CN215233379U CN202120997219.9U CN202120997219U CN215233379U CN 215233379 U CN215233379 U CN 215233379U CN 202120997219 U CN202120997219 U CN 202120997219U CN 215233379 U CN215233379 U CN 215233379U
- Authority
- CN
- China
- Prior art keywords
- multiphase fluid
- downstream
- reducer
- upstream
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Accessories For Mixers (AREA)
Abstract
The utility model discloses a heterogeneous fluid mixer of venturi type, it includes: the device comprises a sleeve (1), an upstream reducing pipe (2), a downstream expanding pipe (3), a multiphase fluid mixing cavity (4) and a feeding pipe (5); the gauge pressure at the multiphase fluid mixing cavity (4) is-0.01 MPa to +0.01 MPa; the multiphase fluid mixing comprises gas-liquid, gas-liquid-solid, liquid-liquid and liquid-solid mixing; the cross-sectional area of the multiphase fluid mixing chamber (4) is larger than the cross-sectional area of the throat. Because the hydrostatic pressure at the multiphase fluid mixing cavity (4) is from micro negative pressure to micro positive pressure, the control is easy, the pressure at the throat part is not influenced by downstream equipment or pipelines, and the pressure is stable, and the second material is introduced into the multiphase fluid mixing cavity (4) by adopting positive pressure providing equipment, and the quantity of the second material introduced into the multiphase fluid mixing cavity (4) can also be stably controlled because the positive pressure of the positive pressure providing equipment can be stably controlled.
Description
Technical Field
The utility model belongs to the technical field of gas-liquid mixer, concretely relates to ability stable control gas flow's heterogeneous fluid mixer of venturi type.
Background
The rapid development and widespread use of large mechanized coal mining technologies, where coal mine stones cause ore refinement during mining and concomitant commingling of more fine-grained clay minerals. The mechanical coal mining equipment cannot effectively distinguish a coal bed and a gangue layer during operation, so that the mined coal contains a large amount of fine clay ore particles and fine coal particles, and the coal is inevitably accompanied by associated minerals (such as kaolinite, feldspar, silica and the like), particularly poor-quality coal, and the content of mineral impurities is higher. The coal water slurry prepared by using the pulverized coal and the prepared coal slurry naturally contains a large amount of mineral impurities, influences the calorific value of the coal water slurry and needs to remove the minerals.
The froth flotation process is a commonly used method for removing mineral impurities, and hydrophobic carbonaceous particles are easily attached to bubbles in a flotation column, float upwards with the bubbles, and hydrophilic mineral particles fall down, thereby removing mineral impurities. Before entering the froth flotation column, it is often necessary to premix the coal water slurry and air in a certain proportion and then to introduce the mixture into the flotation column for flotation, and this premixing process of the coal water slurry and air is generally called pre-mineralization.
In the prior art, there are various devices for premixing water-coal-slurry and air, and a common device is a venturi-type gas-liquid mixer, as shown in fig. 1, the water-coal-slurry is passed through a venturi tube, and a gas inlet is arranged at the throat of the venturi tube, because the diameter of the throat of the venturi tube is much smaller than the diameter of the inlet and outlet at the upstream and downstream of the venturi tube, the flow velocity of the water-coal-slurry at the throat is very fast and is in a jet state, and according to bernoulli's principle, the higher the flow velocity of the fluid, the lower the static pressure is, so that negative pressure (the negative pressure can even reach more than 700 mmHg) is generated at the throat, and external air is sucked, thereby completing the gas-liquid mixing process. Although the venturi mixer has strong air extraction capacity and violent gas-liquid mixing, the venturi mixer has the following defects: the negative pressure at the throat is greatly influenced by downstream equipment or pipelines of the venturi tube, so that the negative pressure at the throat is unstable, the air suction amount is unstable, the fluctuation of the gas-liquid mixing proportion is large, and the subsequent stable operation of the froth flotation column is not facilitated. In addition, the existing multiphase flow mixer has poor mixing effect, and when the existing multiphase flow mixer is particularly applied to mineralization of coal water slurry, the mineralization effect of the coal water slurry is poor, and only large bubbles can be adhered to the surface of carbon-hydrogen-containing combustible particles in the coal water slurry mineralized by the traditional mixer, so that the subsequent separation effect of the carbon-hydrogen-containing combustible particles and mineral particles is poor, and the recovery rate of the separated combustible body is too low.
In order to solve the above problems, the utility model is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heterogeneous fluid mixer of venturi type, it includes following part:
a sleeve 1 having both ends opened and a cavity therein; the upstream end of the mixing chamber is provided with a first material inlet 15, and the downstream end of the mixing chamber is provided with a mixed material outlet 16; a first material enters the sleeve 1 through the first material inlet 15;
an upstream reducer 2 having a diameter reduced from an upstream end to a downstream end, the upstream end being a first fluid inlet 21, the downstream end being a first fluid outlet 22;
a downstream divergent tube 3 having a divergent tube diameter from an upstream end to a downstream end, the upstream end being a second fluid inlet 31, and the downstream end being a second fluid outlet 32;
a multiphase fluid mixing chamber 4 located within the cavity of said sleeve 1 and defined between said upstream reducer 2 and said downstream reducer 3;
a feeding pipe 5 which introduces a second material into the multiphase fluid mixing chamber 4 through a second material inlet 11 positioned on the pipe wall of the sleeve 1; the second material inlet 11 is positioned in the middle of the sleeve 1 and penetrates through the pipe wall of the sleeve 1;
said upstream reducer 2 and said downstream reducer 3 are located within the cavity of said sleeve 1; the zero gauge pressure, the micro positive pressure or the micro negative pressure mean that the gauge pressure at the multiphase fluid mixing cavity 4 is-0.01 MPa to +0.01 MPa;
the cross-sectional area of the multiphase fluid mixing chamber 4 is greater than the cross-sectional area at the first fluid outlet 22.
The multiphase fluid mixing comprises gas-liquid mixing, gas-liquid-solid mixing, liquid-liquid mixing and liquid-solid mixing; when gas-liquid mixing or gas-liquid-solid mixing is performed, the first material inlet 15 is filled with a liquid flow phase or a liquid-solid flow phase (first material), and the feeding pipe 5 is filled with a gas flow phase (second material); when the liquid-liquid mixing or the liquid-solid mixing is performed, the first material inlet 15 is communicated with a first liquid flow phase or a first liquid and solid mixed flow phase (first material), the feeding pipe 5 is communicated with a second liquid flow phase (second material), and the first liquid and the second liquid are immiscible.
Preferably, the upstream end of the downstream divergent pipe 3 has a boss 33, which extends into the multiphase fluid mixing chamber 4 for a distance, and a vortex annular gap 13 is formed between the boundary of the boss 33 and the inner wall of the sleeve 1. The design of the boss causes the gas-liquid mixed fluid to generate vortex at the edge of the boss (namely, at the vortex annular gap 13), the vortex can further increase the hydrostatic pressure in the mixing cavity to enable the hydrostatic pressure to be close to micro negative pressure or zero gauge pressure, and the vortex also strengthens the gas-liquid mixing effect.
Preferably, the venturi-type multiphase fluid mixer further comprises an additive feeding port 14 penetrating through the wall of the casing 1 and an additive feeding pipe 6 communicating with the additive feeding port 14, and the agent is fed to the vortex ring gap 13 through the additive feeding port 14 through the additive feeding pipe 6. When the multiphase fluid mixer is used for pre-mineralizing coal water slurry, the additives mainly comprise medicaments, including kerosene, diesel oil and high-carbon mixed alcohol.
Preferably, the joint of the boss 33 and the downstream divergent pipe 3 of the main body thereof has a rounded design, and the outer wall of the downstream end of the boss 33 is arc-shaped. In the process of mixing the multiphase material in the multiphase fluid mixing cavity 4, the eddy current is arranged at the eddy current annular gap 13, and the self-cleaning capability of the equipment can be improved by the fillet design, so that the material residue at the eddy current annular gap 13 is avoided.
Preferably, the distance between said upstream reducer 2 and said downstream reducer 3 is 1.5-3.5 times the diameter of first fluid outlet 22, and the cross-sectional area of said multiphase fluid mixing chamber 4 is 60% -100% of the cross-sectional area at said first fluid inlet 21.
Preferably, said sleeve 1 further has a protruding buckle 12 on the inner side of the tube wall to prevent said upstream reducer 2 and said downstream reducer 3 from moving into the multiphase fluid mixing chamber 4 therebetween.
Preferably, a positive pressure providing device is further arranged upstream of the feeding pipe 5, when the gauge pressure at the multiphase fluid mixing chamber 4 is zero gauge pressure or micro positive pressure, the positive pressure providing device is adopted to feed the second material into the multiphase fluid mixing chamber 4 through the feeding pipe 5, and when the second material is air, a blower can be selected.
Preferably, said upstream reducer 2 and said downstream reducer 3 are split;
the sleeve 1, the upstream reducer 2, the downstream reducer 3, the feed pipe 5 or the additive feeding pipe 6 are detachably connected. This design is convenient for install and is dismantled, if when certain inside spare part wearing and tearing or damage, conveniently unpack the back and change.
Preferably, the sleeve 1 is selected from stainless steel materials.
Preferably, upstream reducer 2 and downstream reducer 3 are made of wear-resistant ceramic material selected from ZrO2Or SiC.
Use the utility model discloses a venturi type multiphase fluid blender, stable control gas flow's gas-liquid mixture method specifically includes following step:
(1) introducing a first material into the upstream reducer 2 through the first material inlet 15 and the first fluid inlet 21, wherein the liquid material speed gradually increases as the pipe diameter of the upstream reducer 2 gradually decreases, and the liquid material speed reaches a maximum value at the first fluid outlet 22;
(2) the liquid material flows out of the first fluid outlet 22 and enters the multiphase fluid mixing cavity 4, the cross section area of the multiphase fluid mixing cavity 4 is larger than that of the first fluid outlet 22, so that the flow rate of the liquid material is reduced, the hydrostatic pressure of the multiphase fluid mixing cavity 4 is increased to micro negative pressure, zero gauge pressure or even micro positive pressure, and the gauge pressure of the multiphase fluid mixing cavity 4 is-0.01 MPa to +0.01 MPa;
(3) introducing a second material into the multiphase fluid mixing chamber 4 through a feeding pipe 5 by adopting positive pressure providing equipment, or sucking the second material into the multiphase fluid mixing chamber 4 by utilizing micro negative pressure to complete the mixing process of the first material and the second material;
(4) the mixed material enters the downstream divergent pipe 3 through the second fluid inlet 31 and then is discharged out of the multiphase fluid mixer through the second fluid outlet 32 and the mixed material outlet 16;
the gage pressure at the multiphase fluid mixing cavity 4 is-0.01 MPa to +0.01MPa, and the pressure range is controlled to be micro negative pressure, micro positive pressure or zero gage pressure; here 4 pressures in the heterogeneous fluid mixing chamber receive the influence of feed flow, the utility model discloses heterogeneous flow mixer can be under the circumstances of guaranteeing feed flow, control 4 department gauge pressures of heterogeneous fluid mixing chamber are-0.01 MPa- +0.01MPa, and pressure range control is at little negative pressure, pressure or zero gauge pressure.
The multiphase fluid mixing comprises gas-liquid mixing, gas-liquid-solid mixing, liquid-liquid mixing and liquid-solid mixing; when gas-liquid mixing or gas-liquid-solid mixing is carried out, a liquid flow phase or a liquid-solid flow phase is introduced into the first material inlet 15, and a gas flow phase is introduced into the feeding pipe 5; when the liquid-liquid mixing or the liquid-solid mixing is carried out, the first material inlet 15 is introduced into a first liquid flow phase or a first liquid and solid mixed flow phase, the feeding pipe 5 is introduced into a second liquid flow phase, and the first liquid and the second liquid are immiscible.
The third aspect of the present invention provides a method for mixing a multiphase fluid containing microparticles by using the venturi type multiphase fluid mixer, wherein the first material is a liquid-solid mixture containing microparticles; the second material is air; the volume ratio of the liquid-solid mixture containing microparticles to air in the Venturi-type multiphase fluid mixer is 1:0.2-1:1, more preferably 1:0.3-1: 0.8;
preferably, the liquid-solid mixture containing the micro-particles is coal water slurry, and the Venturi type multiphase fluid mixer is used for mixing the coal water slurry and air so as to pre-mineralize the coal water slurry; in the process of pre-mineralization, a microparticle surface modification medicament is added into the multiphase fluid mixing cavity 4;
the microparticle surface modification medicament can be mixed with the coal water slurry firstly and then is used as a first material to be introduced into the Venturi type multiphase fluid mixer; an additive inlet may be further provided in the venturi-type multiphase fluid mixer, and the fine particle surface modification agent may be introduced into the venturi-type multiphase fluid mixer through the additive inlet.
The pre-mineralization is that the coal water slurry is mixed with gas before flotation separation, and the coal is a complex mixture containing organic hydrocarbon and inorganic mineral substances. The organic component in coal is complex, and is a mixture of hydrocarbons with aromatic rings and the like as frameworks, the surface of the mixture formed by nonpolar bonds has strong hydrophobicity, so the mixture is easy to combine with bubbles, and the process of combining the mixture with the bubbles is called as a mineralization process; the minerals in the coal are mainly clay minerals and quartz, have strong hydrophilicity, have low probability of adhering to the bubbles and do not move upwards along with the bubbles. Therefore, the two can be separated by utilizing the difference of the hydrophobicity of the two.
Preferably, the volume ratio of the coal-water slurry to the air in the venturi-type multiphase fluid mixer is 1:0.2 to 1:1, more preferably 1:0.3 to 1: 0.8.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses venturi type gas-liquid mixer includes upper reaches reducing pipe 2, low reaches diverging pipe 3, and multiphase fluid mixing chamber 4 between the two, the utility model sets up the cross-sectional area of multiphase fluid mixing chamber 4 and equals approximately to its upper reaches first fluid entry 21 or its low reaches the cross-sectional area of second fluid export 32, because multiphase fluid mixing chamber 4 department cross-sectional area is greater than throat area (first fluid export 22) or second fluid entry (31 department cross-sectional area), make the liquid material velocity of flow of multiphase fluid mixing chamber 4 department descend, and then the hydrostatic pressure of multiphase fluid mixing chamber 4 department improves to the slight negative pressure to the slight positive pressure (gauge pressure-0.01 MPa- +0.01MPa), adopts positive pressure supply equipment to let in to multiphase fluid mixing chamber 4 through inlet pipe 5, perhaps utilizes the slight negative pressure to inhale ambient air to multiphase fluid mixing chamber 4, completing the gas-liquid mixing process; because the hydrostatic pressure at the multiphase fluid mixing cavity 4 is from micro negative pressure to micro positive pressure, the amount of the second material introduced into the multiphase fluid mixing cavity is smaller and is easier to control, and further, positive pressure providing equipment is adopted to introduce air into the multiphase fluid mixing cavity 4, and because the positive pressure of the positive pressure providing equipment is easy to stably control, the amount of the air introduced into the multiphase fluid mixing cavity 4 can also be stably controlled. Furthermore, because the hydrostatic pressure at the multiphase fluid mixing cavity 4 is from micro negative pressure to micro positive pressure, the pressure at the throat part is hardly influenced by downstream equipment or pipelines, the pressure is stable, and the stable control of the air inlet amount is further improved.
2. The upper reaches end of low reaches divergent pipe 3 has boss 33, and it stretches into 4 one sections distances in heterogeneous fluid mixing chamber, this boss design causes gas-liquid mixture to produce the vortex in boss edge, and this vortex also can further increase the hydrostatic pressure in the mixing chamber, makes it be close to little negative pressure or zero gauge pressure, and the mixed effect of gas-liquid has also been reinforceed to this vortex. Further, the joint of the boss 33 and the downstream divergent pipe 3 of the main body thereof has a rounded design, and the outer wall of the downstream end of the boss 33 is arc-shaped. In the process of mixing the multiphase material in the multiphase fluid mixing cavity 4, the eddy current is arranged at the eddy current annular gap 13, and the self-cleaning capability of the equipment can be improved by the fillet design, so that the material residue at the eddy current annular gap 13 is avoided.
3. The utility model relates to a make the coal slurry velocity of flow of the entrance (first fluid export 22) of heterogeneous fluid mixing chamber 4 approximately equal to the velocity of flow of the gas-liquid mixture fluid of 4 exits (second fluid entry 31) in heterogeneous fluid mixing chamber, because the velocity of flow equals, there is not static pressure loss, also can make 4 internal pressures of heterogeneous fluid mixing chamber be close little negative pressure or zero gauge pressure, and pressure stability.
4. The utility model discloses the heterogeneous fluid mixer of venturi type had both kept the mixed effect of traditional venturi type gas-liquid mixer, had avoided the problem of air admission volume unstable control again.
5. In the preferred embodiment, upstream reducer 2 and downstream reducer 3 are made of a wear-resistant ceramic material, which provides improved wear resistance compared to conventional steel venturis.
6. In a preferred embodiment, the venturi type gas-liquid mixer is integrally designed in a split structure, the sleeve 1, the upstream reducer 2, the downstream reducer 3 or the feeding pipe 5 are detachably connected, the design is convenient to mount and dismount, and if some internal parts are worn or damaged, the parts can be conveniently dismounted and replaced.
7. The multi-phase fluid mixer of venturi type can be used for carrying out the pre-mineralization to the coal slurry, it has both guaranteed the mixed effect of strengthening the gas-liquid, makes the stable control of air admission volume again.
Drawings
Fig. 1 is a schematic structural view of a conventional venturi-type gas-liquid mixer;
FIG. 2 is a schematic diagram of the venturi-type multiphase fluid mixer of the present invention;
fig. 3 is a schematic diagram of an upstream reducer 2 in a venturi-type multiphase fluid mixer according to the present invention;
fig. 4 is a schematic structural view of a downstream divergent pipe 3 in a venturi-type multiphase fluid mixer of the present invention;
the reference numerals are explained below:
1-sleeve, 2-upstream reducer, 3-downstream reducer, 4-multiphase fluid mixing chamber, 5-feeding pipe, 6-additive adding pipe, 11-second material inlet, 12-buckle, 13-vortex annular gap, 14-additive adding port, 15-first material inlet, 16-mixed material outlet, 21-first fluid inlet, 22-first fluid outlet, 31-second fluid inlet, 32-second fluid outlet and 33-boss.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited thereto.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "provided" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
The present embodiment employs a venturi-type multiphase flow mixer, which includes the following components:
a sleeve 1 having both ends opened and a cavity therein; the upstream end of the mixing chamber is provided with a first material inlet 15, and the downstream end of the mixing chamber is provided with a mixed material outlet 16; a first material enters the sleeve 1 through the first material inlet 15;
an upstream reducer 2 having a diameter reduced from an upstream end to a downstream end, the upstream end being a first fluid inlet 21 having an inlet diameter of 20mm, the downstream end being a first fluid outlet 22 having an outlet diameter of 6 mm;
a downstream divergent tube 3 having a divergent tube diameter from an upstream end to a downstream end, the upstream end being a second fluid inlet 31, and the downstream end being a second fluid outlet 32;
a multiphase fluid mixing chamber 4 located within the cavity of said sleeve 1 and defined between said upstream reducer 2 and said downstream reducer 3, the distance between said upstream reducer 2 and said downstream reducer 3 being 2 times the diameter of the first fluid outlet 22;
a feeding pipe 5 which introduces a second material into the multiphase fluid mixing chamber 4 through a second material inlet 11 positioned on the pipe wall of the sleeve 1; the second material inlet 11 is positioned in the middle of the sleeve 1 and penetrates through the pipe wall of the sleeve 1;
said upstream reducer 2 and said downstream reducer 3 are located within the cavity of said sleeve 1; the inner diameter of the multiphase fluid mixing chamber 4 is 3 times the diameter of the first fluid outlet 22;
in the experiment, water is used as a first material, and the first material is sent into the first fluid inlet 21 through a booster water pump; air enters the multiphase fluid mixing chamber 4 from a feed pipe 5; air is used as the second material. The square water tank is connected to the blender end for observe and detect the mixed effect of air and water. The main experimental parameters include the feed flow rates of 0.6, 0.9, 1.1, 1.3, 1.5L/min, and the feed pressures of 0.1, 0.2, 0.3, 0.4, 0.5MPa, respectively.
Comparative experiments were carried out using a conventional venturi tube with a 6mm throat diameter, the feed flow remaining the same. The comparative experiment result is shown in table 1, the pressure of the suction position of the traditional Venturi tube is between-0.062 and-0.388 MPa, and the pressure fluctuation amount under each condition is between 0.01 and 0.04 MPa; the pressure of the air suction part of the mixer of the utility model is between 0.012 and-0.027 MPa, and the pressure fluctuation amount under each condition is between 0.001 and 0.002 MPa. After the gas-liquid two-phase flow processed by the traditional Venturi tube enters the square groove, the size of bubbles is mainly 3-30mm, the bottom plate of the square groove can be seen by naked eyes, and the bubbles completely disappear after the feeding is stopped for about 10 s; through the utility model discloses the gas-liquid two-phase flow that the blender was handled gets into the square groove after, and most bubbles can't observe the size with the naked eye, and the bubble size is less than the contrast experiment well promptly, and the gas-liquid mixture of whole square groove all is milk white, stops about 60s bubble after the feeding and all disappears.
TABLE 1 comparison of the pressure at the intake of the mixer at different feed rates
Example 2
The present embodiment employs a venturi-type multiphase flow mixer, which includes the following components:
a sleeve 1 having both ends opened and a cavity therein; the upstream end of the mixing chamber is provided with a first material inlet 15, and the downstream end of the mixing chamber is provided with a mixed material outlet 16; a first material enters the sleeve 1 through the first material inlet 15;
an upstream reducer 2 having a diameter reduced from an upstream end to a downstream end, the upstream end being a first fluid inlet 21, the downstream end being a first fluid outlet 22, and the outlet having a diameter of 10 mm;
a downstream divergent tube 3 having a divergent tube diameter from an upstream end to a downstream end, the upstream end being a second fluid inlet 31, and the downstream end being a second fluid outlet 32;
a multiphase fluid mixing chamber 4 located within the cavity of said sleeve 1 and defined between said upstream reducer 2 and said downstream reducer 3, the distance between said upstream reducer 2 and said downstream reducer 3 being 2.5 times the diameter of the first fluid outlet 22;
a feeding pipe 5 which introduces a second material into the multiphase fluid mixing chamber 4 through a second material inlet 11 positioned on the pipe wall of the sleeve 1;
said upstream reducer 2 and said downstream reducer 3 are located within the cavity of said sleeve 1; the inner diameter of the multiphase fluid mixing chamber 4 is 3.5 times the diameter of the first fluid outlet 22;
the Venturi type multiphase flow mixer also comprises an additive feeding port 14 penetrating through the pipe wall of the sleeve 1 and an additive feeding pipe 6 communicated with the additive feeding port 14, and the medicament is added to the vortex oscillation cavity 13 through the additive feeding pipe 6 through the additive feeding port 14.
The coal slurry sample with the granularity of less than 100 meshes is taken in the test and placed in a coal slurry storage tank, a storage tank stirring device is opened, the coal slurry is uniformly stirred to prevent sedimentation, and the coal slurry mainly contains hydrocarbon-containing combustible particles (called clean coal after separation), water and mineral particles (called ash after separation and called tail coal after separation).
After the coal slurry is uniformly mixed, the coal slurry is conveyed to a coal slurry feeding buffer tank by using a diaphragm pump, meanwhile, the coal slurry feeding diaphragm pump, a medicament pump and an air compressor are started, medicaments are conveyed in proportion, and a collecting agent and a foaming agent are mixed and added into an additive adding pipe 6. Meanwhile, an air compressor is started to deliver air in proportion, wherein the proportion of the coal slurry, the mineralizing agent and the air is as follows: 1:0.0015:0.4.
The downstream of the multiphase flow mixer with the surface modification function is connected with a microparticle mineral separation device, and after the mineralization-separation whole system is stable, the clean coal foam overflow color can be observed to be obviously blackened compared with the raw material coal slurry, the tail coal flow color is changed into grey white, and no obvious coal particle residue exists. The clean coal stream sample and the tail coal stream sample were mixed, dehydrated, dried, and reduced, respectively, ash content was measured using an industrial analyzer, and combustible recovery rate was calculated, with the results shown in table 2.
Wherein, the ash balance combustible body recovery rate calculation formula is as follows:
in the formula Ea-ash balance combustible recovery (%);
Aj-clean coal dry basis ash (%);
Ay-raw coal dry basis ash (%);
Aw-dry basis ash (%) of the tailings.
TABLE 2 use the utility model discloses the continuous experimental result of the knockout tower is received a little to heterogeneous class blender
For comparison, the present experiment used the conventional venturi shown in fig. 1 as a mixer to pre-mineralize the slurry at the same slurry feed, feed rate, mineralizing agent and air usage (i.e., the two sets of experiments differed only in the mixer). The results of ash testing and combustible recovery in the industrial analysis obtained by the same experimental process and sampling analysis process are shown in table 3.
Table 3 continuous experimental results of micro-nano separation tower using conventional venturi tube as mixer
Can know through the experiment contrast, used the utility model discloses the blender is mineralized in advance the back, and the clean coal ash content is 15.39%, and the tail coal ash content is 80.96%, and combustible body rate of recovery is 72.60%. And through the coal slurry of traditional venturi pre-mineralization, clean coal ash is 13.88%, and tail coal ash 75.85%, and combustible body rate of recovery only is 64.31%, for using the utility model discloses the blender is mineralized the back in advance, though clean coal ash slightly hangs down, but the gap is less, belongs to error range, but tail coal ash is but obviously reduces, and this just leads to combustible body rate of recovery to reduce. Therefore, tradition venturi relatively, the utility model discloses the blender has the heterogeneous mixed effect of mineralize mineralization of better slurry, additive, air in advance, can effectively promote the combustible body rate of recovery.
Claims (8)
1. A venturi-type multiphase fluid mixer, characterized in that it comprises the following components:
a sleeve (1) which is open at both ends and has a cavity inside; the upstream end opening of the mixing device is a first material inlet (15), and the downstream end opening of the mixing device is a mixed material outlet (16); the first material enters the sleeve (1) through the first material inlet (15);
an upstream reducer (2) having a diameter reduced from an upstream end to a downstream end, the upstream end being a first fluid inlet (21) and the downstream end being a first fluid outlet (22);
a downstream divergent tube (3) which is divergent in tube diameter from an upstream end to a downstream end, an upstream end of which is a second fluid inlet (31), and a downstream end of which is a second fluid outlet (32);
a multiphase fluid mixing chamber (4) located within the sleeve (1) cavity and defined between the upstream reducer (2) and the downstream reducer (3);
a feeding pipe (5) for introducing a second material into the multiphase fluid mixing chamber (4) through a second material inlet (11) located on the wall of the sleeve (1);
the upstream reducer (2) and the downstream reducer (3) are located in a cavity of the sleeve (1), and the cross-sectional area of the multiphase fluid mixing cavity (4) is larger than that of the first fluid outlet (22).
2. The venturi-type multiphase fluid mixer according to claim 1, wherein the upstream end of the downstream divergent pipe (3) has a boss (33) extending a distance into the multiphase fluid mixing chamber (4), a vortex annulus (13) being formed between the boundary of the boss (33) and the inner wall of the sleeve (1).
3. The venturi-type multiphase fluid mixer according to claim 2, further comprising an additive introduction port (14) penetrating a wall of the sleeve (1) and an additive introduction pipe (6) communicating with the additive introduction port (14), the fine particle surface modification agent being added through the additive introduction port (14) to the vortex annulus (13) through the additive introduction pipe (6).
4. The Venturi type multiphase fluid mixer according to claim 2, wherein the junction of said boss (33) and its main body of said downstream divergent pipe (3) has a rounded design, and the outer wall of the downstream end of said boss (33) is circular arc-shaped.
5. The venturi-type multiphase fluid mixer according to claim 1, wherein the distance between the upstream reducer (2) and the downstream reducer (3) is 1.5-3.5 times the diameter of the first fluid outlet (22), and the cross-sectional area of the multiphase fluid mixing chamber (4) is 60% -100% of the cross-sectional area at the first fluid inlet (21).
6. The Venturi type multiphase fluid mixer according to claim 1, wherein said sleeve (1) further has a protruding catch (12) on the inside of the tube wall to prevent said upstream reducer (2) and said downstream reducer (3) from moving into the middle multiphase fluid mixing chamber (4).
7. The venturi-type multiphase fluid mixer according to claim 1, further comprising a positive pressure supply device upstream of the feed pipe (5), wherein the second material is introduced into the multiphase fluid mixing chamber (4) through the feed pipe (5) by the positive pressure supply device when the gauge pressure at the multiphase fluid mixing chamber (4) is zero gauge pressure or slightly positive.
8. The venturi-type multiphase fluid mixer according to claim 1, wherein said upstream reducer (2) and said downstream reducer (3) are split;
the sleeve (1), the upstream reducing pipe (2), the downstream reducing pipe (3), the feeding pipe (5) or the additive adding pipe (6) are detachably connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021209703775 | 2021-05-08 | ||
| CN202120970377 | 2021-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215233379U true CN215233379U (en) | 2021-12-21 |
Family
ID=79455551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120997219.9U Active CN215233379U (en) | 2021-05-08 | 2021-05-11 | Venturi type multiphase fluid mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215233379U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113069949A (en) * | 2021-05-08 | 2021-07-06 | 深圳瑞科天启科技有限公司 | Venturi type multiphase fluid mixer and multiphase fluid mixing method |
-
2021
- 2021-05-11 CN CN202120997219.9U patent/CN215233379U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113069949A (en) * | 2021-05-08 | 2021-07-06 | 深圳瑞科天启科技有限公司 | Venturi type multiphase fluid mixer and multiphase fluid mixing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108273668B (en) | Rapid flotation system and flotation method based on high-turbulence mixed mineralization | |
| CA2677887C (en) | Method and apparatus for flotation in a fluidized bed | |
| AU2016314139B2 (en) | System, method and apparatus for froth flotation | |
| CN110586340B (en) | A kind of coarse-grain mineral hydraulic flotation equipment and flotation method based on orifice hydraulic cavitation to form bubbles | |
| CN209020582U (en) | A fluidized coarse-grain flotation equipment | |
| CN204338354U (en) | A kind of electromagnetic eddy flow flotation column | |
| EA029754B1 (en) | Method and apparatus for treating a feed stream for a flotation device | |
| CN215233379U (en) | Venturi type multiphase fluid mixer | |
| RU2603984C2 (en) | Dispersion nozzle, flotation machine equipped therewith and method for operating same | |
| CN112264198A (en) | Micro-nano bubble flotation machine | |
| CN108339673A (en) | A kind of cavitation jet flotation bubble generator and flotation unit | |
| CN108246515A (en) | A kind of size mixing flotation integral system and method for floating of sizing mixing with internal circulatory function | |
| CN105855067B (en) | A kind of unpowered flotation device | |
| AU702378B2 (en) | Flotation column with constant feed arrangement | |
| Liu et al. | Effect of gas on separation performance of an axial hydrocyclone for preliminary water separation | |
| CN113069949A (en) | Venturi type multiphase fluid mixer and multiphase fluid mixing method | |
| CN209020581U (en) | A mixed-flow microbubble generator and bubble distributor | |
| JP3086252B2 (en) | Formation of gas particles | |
| CN209065558U (en) | A kind of settling tank with microbubble cyclone air-flotation | |
| RU189540U1 (en) | Hydrocyclone installation | |
| CN208627554U (en) | A fast flotation system based on strong turbulent mixed mineralization | |
| CN208244961U (en) | A kind of cavitation jet flotation bubble generator and flotation unit | |
| CN112090341B (en) | A multi-stage mixing device and method for solid fuel and liquid medium | |
| US20110110181A1 (en) | Method and apparatus for mixing and/or blending fluids | |
| CN101125313B (en) | Precision sorting flotation machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |