CN109331673B - Quick self-operated mixing device and mixing method - Google Patents
Quick self-operated mixing device and mixing method Download PDFInfo
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- CN109331673B CN109331673B CN201811418786.3A CN201811418786A CN109331673B CN 109331673 B CN109331673 B CN 109331673B CN 201811418786 A CN201811418786 A CN 201811418786A CN 109331673 B CN109331673 B CN 109331673B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2113—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2209—Controlling the mixing process as a whole, i.e. involving a complete monitoring and controlling of the mixing process during the whole mixing cycle
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention discloses a rapid self-operated mixing device and a mixing method, wherein the rapid self-operated mixing device comprises a first cylinder, a second cylinder, a third cylinder, a baffle plate, a power transmission mechanism, a power device, a water pressure difference acquisition unit and a controller; a third cylinder is coaxially arranged in the first cylinder, and the second cylinder penetrates through the first cylinder and is connected with the inner cavity of the third cylinder; small holes are distributed on the surface of the third cylinder; the partition board is connected in the third cylinder body in a sliding way, the power transmission mechanism is arranged in the first cylinder body and the third cylinder body, one end of the power transmission mechanism is connected with the partition board, and the other end of the power transmission mechanism penetrates out of the first cylinder body to be connected with a power device arranged outside the first cylinder body; the water pressure difference acquisition unit is used for acquiring water pressure difference delta P values in the first cylinder and the third cylinder, and the delta P value signals are transmitted to the controller. The invention fills in the rapid self-operated mixing of the fluid of the water mixing device under the low flow and low flow rate, especially under the laminar flow state, ensures that the mixed parameters can be rapidly detected and fed back, and is beneficial to the accurate and timely adjustment of a mixing system.
Description
Technical Field
The invention relates to the technical field of fluid mechanics, in particular to a rapid self-operated mixing device and a mixing method, which are suitable for rapid mixing of two fluids.
Background
When two different liquids are mixed on line, the mixing ratio is changed and the total flow rate is often changed greatly. In particular, in the project of stage production, the pipeline installation is generally designed and constructed according to the final scale, and the pipeline is much larger for the initial production. When two fluids are required to be mixed, the flow rate in the pipeline is extremely low, and particularly, the flow rate of the fluid with smaller mixing proportion is lower. Through two kinds of fluids after the tee bend mixes, unable timely intensive mixing leads to mixing parameter to detect inaccurately, influences the mixing proportion adjustment of system. In order to accurately detect the mixed parameters, a longer mixing section is often required to be designed, and meanwhile, a relatively longer time is required to detect the mixed parameters, so that the mixing proportion adjustment control of the water mixing system is affected. The existing water mixing technology is mainly focused on the design of a mixing proportion adjusting method and a mixing proportion adjusting device, and basically has no device and method for rapidly mixing based on the requirement so as to detect the mixing result in time.
Disclosure of Invention
The invention aims to provide a rapid self-operated mixing device and a mixing method capable of rapidly and uniformly mixing two fluids.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a rapid self-operated mixing device comprises a first cylinder, a second cylinder and a third cylinder;
the third cylinder body is coaxially arranged in the first cylinder body, and the second cylinder body penetrates through the first cylinder body and is connected with the inner cavity of the third cylinder body; the two ends of the first cylinder body are opened, one end is an inlet of a fluid, and the other end is an outlet of mixed fluid; the outer end of the second cylinder body is opened, and the opening end is an inlet of another fluid; the two ends of the third cylinder body are closed, and small holes are distributed on the surface of the cylinder body.
Further, the third cylinder is fixedly mounted by means of a structural support.
The device changes the water mixing of the cylinder body after the three-way water mixing into concentric circle gap water mixing formed by the first cylinder body and the third cylinder body. The same fluid flow rate and concentric gap water mixing are more beneficial to the mixed fluid to reach a surge state. In addition, the small holes on the surface of the cylinder of the third cylinder body disperse the fluid into a plurality of water flows, which is also beneficial to the uniform mixing of the fluid.
When the mixing proportion of the liquid is changed frequently or the total flow is changed frequently and the change amplitude is large, the effect of the rapid self-operated mixing device for realizing rapid and uniform mixing of the two fluids is reduced.
In order to solve the situation, the invention also provides a preferable scheme, namely, a baffle plate, a power transmission mechanism, a power device, a water pressure difference acquisition unit and a controller are added on the basis of the rapid self-operated mixing device;
the partition board is connected in the third cylinder body in a sliding way, and divides the third cylinder body into a left independent cavity and a right independent cavity;
the power transmission mechanism is arranged in the first cylinder and the third cylinder, one end of the power transmission mechanism is connected with the partition board, the other end of the power transmission mechanism penetrates out of the first cylinder to be connected with the power device arranged outside the first cylinder, and the power device drives the partition board to axially slide along the third cylinder through the power transmission mechanism;
the water pressure difference acquisition unit is used for acquiring water pressure difference delta P values in the first cylinder and the third cylinder and transmitting delta P value signals to a controller arranged outside the first cylinder;
the controller is also in signal connection with the power device.
The preferred mixing device can feed back the mixing result in addition to ensuring rapid and uniform mixing of fluids whose mixing ratio or total flow rate is constantly changing.
Furthermore, in order to enable the partition plate to slide stably, a guide and limit mechanism matched with the partition plate is arranged on the inner wall of the third cylinder body, and the partition plate is arranged on the guide and limit mechanism.
Further, the power transmission mechanism is a turbine worm or a pneumatic link mechanism.
Further, the power device is a manual power device, an electric power device, a magnetomotive power device or a pneumatic power device.
Further, the water pressure difference acquisition unit comprises a first pressure sensor arranged in the first cylinder and a second pressure sensor arranged in the third cylinder; or the water pressure difference acquisition unit adopts a pressure difference sensor.
The controller compares the delta P value fed back by the water pressure difference acquisition unit with the delta P set value, and moves the partition plate according to the comparison result so as to ensure the outlet flow rate and the outlet Reynolds number required by maintaining the fluid mixing. The diaphragm movement may be accomplished manually or automatically. For example, a worker can slide the partition board through the power transmission mechanism by a manual power device according to data displayed on a display screen connected with the controller; alternatively, the controller sends a signal to the power unit, which controls the movement of the diaphragm in response to the received signal.
The invention also provides a mixing method using the rapid self-operated mixing device, which comprises the following steps:
a fluid enters the first cylinder from the inlet of the first cylinder;
b fluid enters a third cylinder from an inlet of the second cylinder;
the water pressure difference acquisition unit is used for acquiring the water pressure difference delta P value in the first cylinder and the third cylinder, recording the water pressure difference delta P value as a delta P actual value and transmitting the water pressure difference delta P actual value to the controller;
the controller compares the actual value of delta P with the set value of delta P;
when the actual value of delta P is smaller than the set value of delta P, the controller controls the power device to drive the power transmission mechanism and then drive the partition plate to move towards the independent cavity connected with the second cylinder until the actual value of delta P reaches the set value of delta P;
when the actual value of the delta P is larger than the set value of the delta P, the controller controls the power device to drive the power transmission mechanism to drive the partition plate to move towards the independent cavity which is not connected with the second cylinder until the actual value of the delta P reaches the set value of the delta P;
the Δp set point is an empirical value.
Preferably, the Δp set value is a range value, and the Δp actual value is smaller than the Δp set value, that is, the Δp actual value is smaller than the lower limit of the range value, and the Δp actual value is larger than the Δp set value, that is, the Δp actual value is larger than the upper limit of the range value.
Further, the lower limit of the range value ensures that the orifice outlet flow velocity reaches the Reynolds number of the orifice outlet fluid in a surge state; the upper limit should be not more than 5kPa.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The quick self-operated mixing device solves the problem that two fluids are mixed quickly and automatically at low flow rate and low flow velocity, particularly in a laminar flow state, ensures that two different fluids with different proportions can be mixed quickly and uniformly in a mixing device, ensures that the mixed parameters can be detected quickly and fed back, and is favorable for accurate measurement and timely adjustment of a mixing system.
(2) The length of the water mixing section is reduced, the arrangement of pipelines in a machine room is facilitated, and the area of the machine room is saved.
(3) The invention is based on the fluid mechanics principle, has clear technical thought, easier manufacturing of the mixing device, low cost, rapid and uniform liquid mixing, accurate data measurement after mixing and rapid feedback, and creates favorable conditions for automatic control and adjustment of the mixing proportion.
Drawings
Fig. 1 is a schematic structural diagram of a rapid self-operated mixing device in an embodiment.
In the figure: the device comprises a first cylinder, a second cylinder, a third cylinder, a 4-partition board, a 5-power transmission mechanism, a 6-power device, a 7-guiding and limiting mechanism, an 8-first pressure sensor, a 9-second pressure sensor, a 10-structural support and a 11-controller.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Examples
This embodiment is a preferred embodiment.
The schematic structural diagram of the rapid self-operated mixing device in this embodiment is shown in fig. 1, and includes a first cylinder 1, a second cylinder 2, a third cylinder 3, a partition plate 4, a power transmission mechanism 5, a power device 6, a guiding and limiting mechanism 7, a first pressure sensor 8, a second pressure sensor 9, a structural support member 10 and a controller 11. In this embodiment, the first cylinder 1, the second cylinder 2 and the third cylinder 3 are all cylindrical cylinders, wherein the diameter of the first cylinder 1 is the largest. The third cylinder body 3 is coaxially arranged in the first cylinder body 1, and the third cylinder body 3 is fixed by a structural support piece 10. Obviously, the first cylinder 1 is longer than the third cylinder 3. The two ends of the first cylinder body 1 are opened, one end is a fluid inlet, and the other end is a mixed fluid outlet. The two ends of the third cylinder body 3 are closed, and tens to hundreds of small holes are drilled on the surface of the third cylinder body 3. The second cylinder 2 passes through the surface of the first cylinder 1 and intersects with the surface of the third cylinder 3 and is connected with the inner cavity of the third cylinder 3, and preferably, the connection part of the second cylinder 2 and the third cylinder 3 is positioned at the side part of the third cylinder 3. The second cylinder 2 is open at its outer end, which is the inlet for another fluid.
The third cylinder body 3 is connected with a partition board 4 in a sliding mode, the partition board 4 divides the third cylinder body 3 into a left independent cavity and a right independent cavity, the partition board 4 can axially slide in the third cylinder body 3, and the volume ratio of the two independent cavities is adjustable. In order to enable the partition board 4 to slide stably, a guiding and limiting mechanism 7 matched with the partition board 4 is arranged on the inner wall of the third cylinder body 3, the partition board 4 is arranged on the guiding and limiting mechanism 7, and the guiding and limiting mechanism 7 is used for guiding and limiting the sliding of the partition board 4.
The first cylinder 1 and the third cylinder 3 are internally provided with a power transmission mechanism 5, the power transmission mechanism 5 is axially arranged in the first cylinder 1 and the third cylinder 3 and penetrates through the first cylinder 1 to be connected with a power device 6 arranged outside the first cylinder 1, the power device 6 is used for controlling the power transmission mechanism 5 to drive the partition board 4 to slide, and the control logic is from a set delta P value. The first cylinder 1 is internally provided with a first pressure sensor 8, the third cylinder 3 is internally provided with a second pressure sensor 9, specifically, the first pressure sensor 8 is arranged at the fluid inlet of the first cylinder 1, and the second pressure sensor 9 is arranged at the fluid inlet of the third cylinder 3. The first pressure sensor 8 and the second pressure sensor 9 are used for acquiring the water pressure difference Δp value in the first cylinder 1 and the third cylinder 3, recording the water pressure difference Δp value as an actual Δp value, and transmitting an actual Δp value signal to the controller 11. The controller 11 compares the Δp actual value signal with the set Δp set value, and adjusts the movement of the separator 4 according to the comparison result.
When A, B the mixing ratio of the two fluids changes or other reasons cause the actual value of deltap to deviate from the set value of deltap, the controller 11 controls the power device 6 to drive the partition board 4 to move through the power transmission mechanism 5. Specifically, when the actual value of Δp is smaller than the set value of Δp, the partition board 4 is driven to move to the left to reduce the volume of the independent cavity on the left side of the third cylinder 3, correspondingly, the number of small holes of fluid B flowing into fluid a is reduced, the flow rate of fluid B flowing out is increased, and the actual value of Δp is increased until the set value of Δp is reached; when the actual value of delta P is larger than the set value of delta P, the partition board 4 is driven to move right, the volume of the independent cavity at the left side of the third cylinder body 3 is increased, the quantity of small holes for flowing the fluid B into the fluid A is correspondingly increased, the flow rate of the small holes is reduced, and the actual value of delta P is reduced until the set value of delta P is reached. In practical engineering, in order to avoid too frequent movement of the partition plate 4, the Δp set value may be set to a range value, and the lower limit value needs to ensure that the flow velocity of the outlet orifice reaches a reynolds number for ensuring the outlet orifice fluid to be in a surge state; the upper limit is required to meet the requirement that the resistance of the mixing device is not too large, and is controlled to be about 3kPa, preferably not more than 5kPa at maximum.
The core technology of the invention is that one fluid (B fluid) is divided into tens to hundreds of fluid or more by a fluid through small holes, and the mixed water of the mixed cylinder is changed into concentric gap mixed water, so that the two fluids in the mixing device can be quickly and automatically mixed uniformly. When the mixing ratio is changed frequently or the total flow is changed frequently, the deltap set point is set, and the outlet flow rate and the outlet reynolds number required for maintaining the fluid mixing are ensured by the movement of the partition plate.
Other variations or modifications of the above description may be made by those skilled in the art, such as changing two pressure sensors to a single differential pressure sensor; for example, the power transmission mechanism is provided with a turbine worm, a pneumatic connecting rod mechanism and the like; such as manual, electric, pneumatic, etc. power means; the delta P set value can be changed into parameter set values such as a temperature set value, a concentration set value and the like, and correspondingly, the pressure sensor is replaced by a sensor of corresponding parameters. In addition, the mixing device of the invention also has the function of adjusting the mixing proportion, and other changes or modifications which are derived from the spirit of the invention still belong to the protection scope of the invention.
Claims (8)
1. A quick self-operated mixing device is characterized in that:
comprises a first cylinder, a second cylinder and a third cylinder;
the first cylinder body is axially and horizontally arranged, the third cylinder body is coaxially arranged in the cylinder body, and the second cylinder body penetrates through the first cylinder body and is connected with the inner cavity of the third cylinder body; the two ends of the first cylinder body are opened, one end is an inlet of a fluid, and the other end is an outlet of mixed fluid; the outer end of the second cylinder body is opened, and the opening end is an inlet of another fluid; the two ends of the third cylinder are closed, and small holes are distributed on the surface of the third cylinder;
the third cylinder is fixedly installed through a structural support piece;
the device also comprises a baffle plate, a power transmission mechanism, a power device, a water pressure difference acquisition unit and a controller;
the partition board is connected in the third cylinder body in a sliding way, and divides the third cylinder body into a left independent cavity and a right independent cavity;
the power transmission mechanism is arranged in the first cylinder and the third cylinder, one end of the power transmission mechanism is connected with the partition board, the other end of the power transmission mechanism penetrates out of the first cylinder to be connected with the power device arranged outside the first cylinder, and the power device drives the partition board to axially slide along the third cylinder through the power transmission mechanism;
the water pressure difference acquisition unit is used for acquiring water pressure difference delta P values in the first cylinder and the third cylinder and transmitting delta P value signals to a controller arranged outside the first cylinder;
the controller is also connected with a power device.
2. The rapid self-sustaining mixing device according to claim 1, wherein:
the inner wall of the third cylinder body is provided with a guiding and limiting mechanism matched with the partition board, and the partition board is arranged on the guiding and limiting mechanism.
3. The rapid self-sustaining mixing device according to claim 1, wherein:
the power transmission mechanism is a turbine worm or a pneumatic connecting rod mechanism.
4. The rapid self-sustaining mixing device according to claim 1, wherein:
the power device is a manual power device, an electric power device, a magnetic power device or a pneumatic power device.
5. The rapid self-sustaining mixing device according to claim 1, wherein:
the water pressure difference acquisition unit comprises a first pressure sensor arranged in the first cylinder and a second pressure sensor arranged in the third cylinder; or, the water pressure difference acquisition unit adopts a pressure difference sensor.
6. A rapid self-operated mixing method is characterized in that:
the rapid self-sustaining mixing device of any one of claims 1-5, comprising:
a fluid enters the first cylinder from the inlet of the first cylinder;
b fluid enters a third cylinder from an inlet of the second cylinder;
the water pressure difference acquisition unit is used for acquiring the water pressure difference delta P value in the first cylinder and the third cylinder, recording the water pressure difference delta P value as a delta P actual value and transmitting the water pressure difference delta P actual value to the controller;
the controller compares the actual value of delta P with the set value of delta P;
when the actual value of delta P is smaller than the set value of delta P, the controller controls the power device to drive the power transmission mechanism and then drive the partition plate to move towards the independent cavity connected with the second cylinder until the actual value of delta P reaches the set value of delta P;
when the actual value of the delta P is larger than the set value of the delta P, the controller controls the power device to drive the power transmission mechanism to drive the partition plate to move towards the independent cavity which is not connected with the second cylinder until the actual value of the delta P reaches the set value of the delta P;
the Δp set point is an empirical value.
7. The rapid self-sustaining mixing method according to claim 6, wherein:
the Δp set value is a range value, and the Δp actual value is smaller than the Δp set value, that is, the Δp actual value is smaller than the lower limit of the range value, and the Δp actual value is larger than the Δp set value, that is, the Δp actual value is larger than the upper limit of the range value.
8. The rapid self-sustaining mixing method according to claim 7, wherein:
the lower limit value of the range value ensures that the flow rate of the outlet of the small hole reaches the Reynolds number of the fluid at the outlet of the small hole and is in a surge state; the upper limit should be not more than 5kPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811418786.3A CN109331673B (en) | 2018-11-26 | 2018-11-26 | Quick self-operated mixing device and mixing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418786.3A CN109331673B (en) | 2018-11-26 | 2018-11-26 | Quick self-operated mixing device and mixing method |
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| CN109331673A CN109331673A (en) | 2019-02-15 |
| CN109331673B true CN109331673B (en) | 2024-01-09 |
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| CN104801214A (en) * | 2015-04-17 | 2015-07-29 | 清华大学 | Tubular mixer with spiral channel |
| CN108246221A (en) * | 2018-03-29 | 2018-07-06 | 睦化(上海)流体工程有限公司 | Micropore is vortexed casing mixing reactor and its application |
| CN209393044U (en) * | 2018-11-26 | 2019-09-17 | 武汉腾云数冷科技有限公司 | A kind of quick self-operated type mixing arrangement |
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2018
- 2018-11-26 CN CN201811418786.3A patent/CN109331673B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK212882A (en) * | 1981-05-23 | 1982-11-24 | Ruhrgas Ag | DEVICE FOR QUANTITY AND / OR CONDITIONAL CONTROL OF TWO GAS AND / OR LIQUID FLOWS |
| CN201787581U (en) * | 2010-09-16 | 2011-04-06 | 哈尔滨北辰电站设备有限公司 | Mixing device with pore plates |
| CN102794119A (en) * | 2011-05-26 | 2012-11-28 | 北京化工大学 | Method for preparing monodisperse emulsion |
| CN102580661A (en) * | 2012-03-12 | 2012-07-18 | 山东鸿瑞石油化工有限公司 | Three-component polymeric monomer feeding device |
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| CN104603539A (en) * | 2012-08-13 | 2015-05-06 | 日野自动车株式会社 | Burner |
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| CN104801214A (en) * | 2015-04-17 | 2015-07-29 | 清华大学 | Tubular mixer with spiral channel |
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