CN109332018B - Hydraulic cyclone - Google Patents

Abstract

The invention belongs to the technical field of extraction and separation, and discloses a hydrocyclone. The hydrocyclone comprises: the liquid inlet pipe is used for supplying the oil phase extracting agent and the wastewater, and a plurality of baffle plates are arranged in the liquid inlet pipe; the cyclone body comprises a cylindrical pipe positioned on the upper part of the cyclone body and a tail pipe positioned on the lower part of the cyclone body, the cylindrical pipe is respectively communicated with the liquid inlet pipe and the tail pipe, and an overflow pipe is also arranged in the cylindrical pipe. According to the invention, the plurality of baffles are arranged in the liquid inlet pipe, so that the turbulent kinetic energy of the oil phase extractant and the wastewater is increased, the contact area of the two phases is increased, and the extraction capacity is increased on the basis of original separation, so that the extractant and the wastewater can be separated through the cyclone body after being rapidly extracted through the liquid inlet pipe, and meanwhile, the cyclone has extraction and separation capacities, and the problem that the existing cyclone cannot simultaneously have extraction and separation is solved.

Description

a hydrocyclone

technical field

The invention relates to the technical field of extraction and separation, in particular to a hydrocyclone.

Background technique

The hydrocyclone is a kind of separation equipment, which mainly uses the different centrifugal force of the two phases to separate the two phases.

For the coal chemical wastewater industry, oil removal and dephenolization are carried out in the pretreatment stage. The existing technology mainly uses oil separators for oil removal and extraction towers for dephenolization, but both of them cover a large area and have high costs.

Therefore, there is an urgent need to provide a new type of hydrocyclone to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hydrocyclone to solve the problem that the existing cyclone cannot have both extraction and separation at the same time.

For this purpose, the present invention adopts the following technical solutions:

A hydrocyclone comprising:

The liquid inlet pipe is used for supplying the oil phase extractant and waste water, and the liquid inlet pipe is provided with a plurality of baffles;

The cyclone body includes a cylindrical pipe located at the upper part of the cyclone body and a tail pipe located at the lower part of the cyclone body. The cylindrical pipe is respectively connected with the liquid inlet pipe and the tail pipe.

Preferably, the baffles are arranged alternately and annularly on the inner wall of the liquid inlet pipe.

Preferably, the height of the baffle is 0.2-0.8 times the diameter of the liquid inlet pipe.

Preferably, the shape of the baffle is a rectangle, an arc or a triangle.

Preferably, the included angle between the baffle and the liquid inlet direction of the liquid inlet pipe is 50°-120°.

Preferably, the distance between two adjacent baffles is 10mm-25mm.

Preferably, the length of the liquid inlet pipe is 100mm-200mm.

Preferably, the diameter of the liquid inlet pipe is 10mm-30mm.

Preferably, the cyclone body further includes a double-cone pipe, which is located between the cylindrical pipe and the tail pipe.

Preferably, the cylindrical pipe is connected with the overflow pipe and the double-cone pipe respectively through flanges, and the double-cone pipe is connected with the tail pipe through flanges.

Beneficial effects of the present invention:

The invention increases the turbulent kinetic energy of the oil-phase extractant and the wastewater by arranging a plurality of baffles inside the liquid inlet pipe, increases the contact area of the two phases, and increases the extraction capacity on the basis of the original separation, so that the extractant and the wastewater can be separated. After the rapid extraction through the liquid inlet pipe, the two can be separated through the cyclone body, which has both extraction and separation capabilities, and solves the problem that the existing cyclone cannot have both extraction and separation at the same time.

Description of drawings

FIG. 1 is a schematic structural diagram of a hydrocyclone provided by the present invention.

In the picture:

1. Inlet pipe; 2. Cylindrical pipe; 3. Overflow pipe; 4. Double cone pipe; 5. Tail pipe; 6. Baffle.

Detailed ways

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

As shown in FIG. 1 , it is a schematic structural diagram of the hydrocyclone provided by the present invention. The hydrocyclone includes a liquid inlet pipe 1 and a cyclone body, and the cyclone body includes a cylindrical pipe 2, an overflow pipe 3, a double cone pipe 4 and a tail pipe 5, wherein:

The liquid inlet pipe 1 is used for supplying the oil phase extractant and waste water, and a plurality of baffles 6 are arranged in the liquid inlet pipe 1. By setting a plurality of baffle plates 6 inside the liquid inlet pipe 1, the difference between the oil phase extraction agent and the waste water is increased. The turbulent kinetic energy increases the contact area of the two phases, and the extraction capacity is increased on the basis of the original separation, so that the extraction agent and the wastewater can be quickly extracted through the liquid inlet pipe 1.

The cylindrical pipe 2 is located at the upper part of the cyclone body, and the tail pipe 5 is located at the lower part of the cyclone body. The cylindrical pipe 2 is connected with the liquid inlet pipe 1 and the tail pipe 5 respectively. Preferably, the liquid outlet direction of the liquid inlet pipe 1 is arranged along the tangent of the cylindrical pipe 2 , and the overflow pipe 3 is located at the center of the cylindrical pipe 2 and communicated with the cylindrical pipe 2 . In this way, the oil phase extractant and the waste water can enter the cylindrical tube 2 to generate centrifugal force, and under the action of the centrifugal force, the oil phase extractant and the water phase are separated, and the oil phase extractant is shifted to the center of the cylindrical tube 2, and finally The waste water is discharged through the overflow pipe 3, and the waste water is discharged through the tail pipe 5.

Specifically, the double-cone pipe 4 is located between the cylindrical pipe 2 and the tail pipe 5. Preferably, the cylindrical pipe 2 is connected with the overflow pipe 3 and the double-cone pipe 4 by flanges, respectively, and the double-cone pipe 4 and the tail pipe 5 are connected by a method. blue connection. In the vertical direction, the diameter of the double-cone pipe 4 gradually decreases, so that when the oil phase extractant and the waste water enter the cylindrical pipe 2 and then reach the double-cone pipe 4, the tangential velocity can be increased due to the reduction of the diameter, thereby increasing the tangential velocity. The effect of two-phase separation is guaranteed. Moreover, the double-cone tube 4 can make the rotational angular momentum of the internal fluid be replenished in time, improve the swirl intensity, and strengthen the separation.

Specifically, the end of the tail pipe 5 can also be provided with one or more sections of tapered pipes. Since the tail pipe 5 is usually long, the rotation strength of the central light phase (ie the oil phase) at the end is significantly weakened, the angular momentum is insufficient, and “swinging” often occurs. tail" phenomenon, which affects the separation efficiency. However, adding one or more conical tubes at the end of the tail pipe 5 can make up for the angular momentum and stabilize the central light phase liquid column, thereby improving the separation efficiency.

Specifically, the baffles 6 are alternately arranged on the inner wall of the liquid inlet pipe 1, which can increase the turbulent kinetic energy and contact area of the liquid, so that the extractant can more effectively extract the organic matter in the wastewater. Preferably, the distance between two adjacent baffles 6 is 10mm-25mm. Further, the shape of the baffle 6 is a rectangle, an arc or a triangle, and may also be other shapes, which are not specifically limited in this embodiment. In order to further improve the turbulent kinetic energy of the oil phase extractant and the waste water, the included angle between the baffle 6 and the liquid inlet direction of the liquid inlet pipe 1 is set to 50°-120°.

Specifically, the length of the liquid inlet pipe is 100mm-200mm, and the diameter is 10mm-30mm, so as to make the extraction effect of the oil phase extractant and the waste water more sufficient.

The following is a comparison of the experimental process and results between the conventional hydrocyclone and the hydrocyclone provided by the present invention.

The hydrocyclone used in this embodiment is a traditional double-cone type hydrocyclone. The traditional double-cone type hydrocyclone and the hydrocyclone provided by the present invention are tested separately. In the experiment, two types of hydrocyclones are used. The diameter of the cylindrical pipe 2 is 40mm, the height is 40mm, the diameter of the overflow pipe 3 is 4mm, the length of the upper cone pipe of the double cone pipe 4 is 76mm, the length of the lower cone pipe is 382mm, the length of the liquid inlet pipe 1 is 200mm, the diameter is 15mm, the block The heights of the plates 6 are respectively 3mm, 5mm, 7mm, 9mm and 11mm, and the baffles are installed in a staggered position.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

Example 1

In this example, a traditional hydrocyclone is used for the experimental operation, and a small amount of raw water is taken to measure its COD (Chemical Oxygen Demand). In the device, after the system runs stably, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E1.

Embodiment 2

The difference between this embodiment and the first embodiment is that a rectangular baffle 6 with a width of 3 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 is installed perpendicular to the liquid inlet pipe 1, and the system is running. After stabilization, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E2.

Embodiment 3

The difference between this embodiment and the first embodiment is that a rectangular baffle 6 with a width of 5 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 is installed perpendicular to the liquid inlet pipe 1, and the system is running. After stabilization, take the wastewater flowing out from the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E3.

Embodiment 4

The difference between this embodiment and the first embodiment is that a rectangular baffle 6 with a width of 7 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 is installed perpendicular to the liquid inlet pipe 1, and the system is running. After stabilization, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E4.

Embodiment 5

The difference between this embodiment and the first embodiment is that a rectangular baffle 6 with a width of 9 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 is installed perpendicular to the liquid inlet pipe 1, and the system is running. After stabilization, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E5.

Embodiment 6

The difference between this embodiment and the first embodiment is that a rectangular baffle 6 with a width of 11 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 is installed perpendicular to the liquid inlet pipe 1, and the system is running. After stabilization, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E6.

Embodiment 7

The difference between this embodiment and the fourth embodiment is that a rectangular baffle 6 with a width of 7 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the baffle 6 and the liquid inlet pipe 1 are installed at an included angle of 70°, After the system runs stably, take the wastewater flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E7.

Embodiment 8

The difference between this embodiment and the fourth embodiment is that the baffle plate 6 and the liquid inlet pipe 1 are installed at an angle of 80°. After the system runs stably, the waste water flowing out of the tail pipe 5 is taken to measure its COD and the pressure from the inlet to the tail outlet is measured. Decrease p, record and calculate the COD removal rate E8.

Embodiment 9

The difference between this embodiment and the fourth embodiment is that a rectangular baffle 6 with a width of 7 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and the second baffle plate 6 is staggered and vertically installed at a distance of 15 mm behind the first baffle plate 6. Two baffles 6, after the system runs stably, take the waste water flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E9.

Embodiment ten

The difference between this embodiment and the fourth embodiment is that a rectangular baffle 6 with a width of 7 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and a second baffle plate 6 is staggered and installed at a distance of 18 mm behind the first baffle 6. Block baffle 6, after the system runs stably, take the waste water flowing out of the tail pipe 5 to measure its COD and measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E10.

Embodiment 11

The difference between this embodiment and the fourth embodiment is that a rectangular baffle 6 with a width of 7 mm and a height of 15 mm is installed at a distance of 60 mm from the inlet of the liquid inlet pipe 1, and a second baffle plate 6 is staggered and installed at a distance of 20 mm behind the first baffle 6. Block baffle 6, after the system runs stably, take the waste water flowing out of the tail pipe 5 to measure its COD, measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E11.

Embodiment 12

The difference between this embodiment and the eleventh embodiment is that the third baffle 6 is staggered and vertically installed at a distance of 20 mm behind the second baffle 6, and the COD of the waste water flowing out of the tail pipe 5 is measured after the system runs stably. And measure the pressure drop p from the inlet to the tail outlet, record and calculate the COD removal rate E12.

Embodiment thirteen

The difference between this embodiment and the twelfth embodiment is that the fourth baffle 6 is installed staggeredly at a distance of 20 mm behind the third baffle 6, and after the system runs stably, the waste water flowing out of the tail pipe 5 is taken to measure its COD and Measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E13.

Embodiment 14

The difference between this embodiment and the thirteenth embodiment is that the fifth baffle 6 is installed staggeredly at a distance of 20 mm behind the fourth baffle 6, and after the system runs stably, the waste water flowing out of the tail pipe 5 is taken to measure its COD and Measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E14.

Embodiment fifteen

The difference between this embodiment and the fourteenth embodiment is that the sixth baffle 6 is installed staggeredly at a distance of 20 mm behind the fifth baffle 6, and after the system runs stably, the waste water flowing out of the tail pipe 5 is taken to measure its COD and Measure the pressure drop p from the inlet to the tail outlet, and record and calculate the COD removal rate E15.

Table 1 shows the extraction rate and pressure drop of the liquid inlet pipes with different structural designs. Table 1 shows that the cyclone with the baffles 6 installed in the liquid inlet pipe 1 in a staggered manner improves the COD removal rate compared with the traditional hydrocyclone. 29%, therefore, the hydrocyclone provided by the present invention can significantly reduce the COD of wastewater. Moreover, it can be seen from Table 1 that when multiple baffles 6 are installed in a staggered manner, the removal rate is higher than that of a single baffle 6. Therefore, by increasing a certain number of baffles 6, it is more beneficial to reduce the COD of wastewater.

Table 1

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For users of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (9)

1. a hydrocyclone, is characterized in that, comprises: a liquid inlet pipe (1), which is used for supplying the oil phase extractant and waste water, and a plurality of baffles (6) are arranged in the liquid inlet pipe (1); A cyclone body, comprising a cylindrical pipe (2) located at the upper part of the cyclone body and a tail pipe (5) located at the lower part of the cyclone body, the cylindrical pipe (2) being respectively connected to the liquid inlet The pipe (1) is communicated with the tail pipe (5), and an overflow pipe (3) is also provided in the cylindrical pipe (2); The baffles (6) are alternately arranged on the inner wall of the liquid inlet pipe (1). 2 . The hydrocyclone according to claim 1 , wherein the height of the baffle plate ( 6 ) is 0.2-0.8 times the diameter of the liquid inlet pipe ( 1 ). 3 . 3. The hydrocyclone according to claim 1, wherein the baffle plate (6) has a shape of a rectangle, an arc or a triangle. 4 . The hydrocyclone according to claim 1 , wherein the included angle between the baffle plate ( 6 ) and the liquid inlet direction of the liquid inlet pipe ( 1 ) is 50°-120°. 5 . 5. The hydrocyclone according to claim 1, wherein the distance between two adjacent baffles (6) is 10mm-25mm. 6. The hydrocyclone according to claim 1, wherein the length of the liquid inlet pipe (1) is 100mm-200mm. 7. The hydrocyclone according to claim 1, wherein the diameter of the liquid inlet pipe (1) is 10mm-30mm. 8. The hydrocyclone according to any one of claims 1-7, wherein the cyclone body further comprises a double cone pipe (4), which is located between the cylindrical pipe (2) and the between the tail pipes (5). 9. The hydrocyclone according to claim 8, wherein the cylindrical pipe (2) is respectively connected with the overflow pipe (3) and the double-cone pipe (4) by flanges, so that the The double-cone pipe (4) is connected with the tail pipe (5) through a flange.

Images