CN106111360A - Compound cyclone separator - Google Patents

Abstract

The invention discloses a compound cyclone separator, which comprises a straight pipe, guide vanes are arranged in the straight pipe, the straight pipe is connected with an open pipe, the open pipe is trumpet-shaped, and the open pipe is A rectifier is arranged under the tube, the rectifier is conical, a V-shaped cavity is formed between the open tube and the rectifier, the cavity communicates with the straight tube, and an annular tube is connected to the bottom of the cavity. Several cyclone separators are evenly connected on the outer circumference of the pipe, and the cyclone separators are connected to the annular pipe through the connecting pipe. The invention has the advantages of convenient installation, simple structure and low processing cost; the processing capacity of the cyclone separator has been greatly improved. Great improvement; the pressure loss of the liquid in the distributor and cyclone separator is small, the flow distribution is uniform, and the overall operating performance has been significantly improved.

Description

Composite Cyclone Separator

technical field

The invention relates to a composite cyclone separator for separating and concentrating liquid-solid two-phase flow with small difference in density, belonging to the technical field of solid-liquid separation.

Background technique

At present, the basic process of urban sewage treatment is generally: water inlet → coarse screen and water inlet pump room → fine screen and cyclone sedimentation tank → hydrolytic acidification tank → ... → concentration tank → homogeneous tank → sludge dewatering machine room → sludge The cake is transported out for disposal, and the sludge content in the sewage is about 2%-5% before the sludge dehydration process. For example, the authorized announcement number is CN104058559B, which discloses a sewage treatment method and a sewage treatment system. This system eliminates the links of fine grids, grit chambers, secondary sedimentation tanks, sludge concentration and sludge disposal in the sewage treatment process. But the general idea is still not separated from the existing technical route.

If the sludge is further concentrated before sludge dewatering, the working efficiency of the filter press or centrifuge during the sludge dewatering process can be greatly improved, and the cost of sewage treatment can be greatly reduced.

The cyclone separator is a kind of wet mechanical separation and classification equipment with a wide range of uses. It can be used not only in the case of large processing volume and continuous operation, but also in the case of relatively small processing volume. In the process of sewage treatment, cyclone can be used The separator further concentrates the sludge. The so-called concentration refers to reducing the content of the continuous phase liquid in the heterogeneous mixture, and the purpose is to obtain a high-concentration dispersed phase material. The particle size of sludge particles in sewage is very small, only a few microns to tens of microns, so the size of the cyclone separator used is correspondingly small, and the corresponding processing capacity is also small.

Contents of the invention

The object of the present invention is to provide a composite cyclone separator with simple structure, convenient operation, small pressure loss, greater processing capacity and higher separation efficiency to further concentrate the sludge.

In order to achieve the above-mentioned technical purpose, technical scheme of the present invention is:

A composite cyclone separator, comprising a straight pipe, guide vanes are arranged in the straight pipe, the straight pipe is connected with an open pipe, in order to reduce the pressure loss at the joint between the straight pipe and the open pipe, The joints are transitioned with arc segments. The open pipe is trumpet-shaped, a rectifier is arranged under the open pipe, the rectifier is conical, a V-shaped cavity is formed between the open pipe and the rectifier, and the cavity communicates with the straight pipe. An annular pipe is connected to the bottom of the cavity. In order to distribute the flow evenly, several cyclone separators are evenly connected on the outer circumference of the annular pipe, and the cyclone separators are connected to the annular pipe through connecting pipes.

The cone angle of the rectifier is consistent with the helix angle of the helical guide vane.

In order to adjust the size and direction of the flow velocity of the spiral flow, the cone angle of the rectifier is larger than that of the open pipe.

The cyclone separator includes a cylindrical barrel, an underflow pipe and a conical pipe, the cylindrical barrel and the underflow pipe are arranged at both ends of the conical pipe, an overflow pipe is inserted into the cylindrical barrel, and a connecting pipe is connected to the side of the cylindrical barrel .

The included angle between the connecting pipe and the tangential plane of the outer circumferential surface of the annular pipe is 60°.

The inlet inclination angle between the connecting pipe and the cylindrical pipe is 5°-15°.

The cross section of the connecting pipe is rectangular, and the ratio of length to width is 2:3.

In order to minimize the pressure loss of the composite cyclone, the inlet direction of the cyclone separator is consistent with the spiral flow direction in the annular pipe.

The guide blade is a spinner composed of four helical blades, and the four helical blades are evenly distributed on the circumference, and the wrap angles are all 90°.

The helix angle of the guide vanes is 45°.

The invention has the advantages of convenient installation, simple structure and low processing cost; the processing capacity of the cyclone separator is greatly improved; the pressure loss of the liquid in the distributor and the cyclone separator is small, the flow distribution is uniform, and the overall operating performance is improved. Significantly increased.

Description of drawings

Figure 1 is a structural schematic diagram of a composite cyclone separator.

Figure 2 is a top view of the composite cyclone separator.

Fig. 3 is a top view of Comparative Example 1-8.

FIG. 4 is a top view of Comparative Example 9.

FIG. 5 is a structural schematic diagram of Comparative Example 10.

Fig. 6 is a schematic diagram of the oblique single-entry cyclone separator of the embodiment.

FIG. 7 is a schematic structural diagram of Comparative Example 11.

FIG. 8 is a structural schematic diagram of Comparative Example 12.

Fig. 9 is a comparison chart of the separation efficiency of the embodiment and comparative examples 10, 11 and 12.

Fig. 10 is a schematic diagram of the structure of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-8 and 10, the composite cyclone separator includes a straight pipe 1, a trumpet-shaped open pipe with a small upper part and a larger lower part 2, an annular pipe 3, a rectifier 6, a spiral guide vane 5, and an arc pipe 8 and the cyclone separator 4 of oblique cut single inlet type, wherein the straight pipe 1 is a round pipe with a diameter of 102mm, the angle between the busbar of the flared open pipe and the horizontal plane is 40°, and the diameter of the large circle at the bottom of the open pipe 2 is 380mm, The outer diameter of the annular pipe 3 (rectangular in cross-section) is 500 mm, the radius of the chamfering of the arc pipe 8 at the junction of the straight pipe 1 and the open pipe 2 is 50 mm, the helix angle of the spiral guide vane 5 is 45°, and the wrap angle is 90° °, the angle between the bus bar of the conical rectifier 6 and the horizontal plane is 45°. A V-shaped cavity 7 is formed between the open pipe 2 and the rectifier 6 .

The cyclone separator includes a cylindrical barrel 9, an underflow pipe 10 and a conical pipe. The cylindrical barrel 9 and the underflow pipe 10 are arranged at both ends of the conical pipe. An overflow pipe 11 is inserted on the cylindrical barrel 9. The side of the cylindrical pipe Connected with connecting pipe. The cyclone separator is an oblique cut single inlet type, and its 4 inlets (connecting pipes) have a rectangular cross-section, the length and width are 25mm and 40mm respectively, the diameter of the cylindrical barrel 9 is 100mm, the length of the cylindrical section is 100mm, and the diameter of the underflow pipe is 10mm. 25mm, the diameter of the overflow pipe 11 is 35mm, the depth of the overflow pipe inserted into the cylindrical barrel 9 is 65mm, and the cone angle is 8°. The included angle of the tangent plane of the surface is 60°, and the inlet inclination angle of the beveled single-entrance cyclone separator 4 (that is, the connecting pipe) is 5°.

In order to illustrate that the compound cyclone of this embodiment has smaller pressure loss and more uniform flow distribution, a number of comparative experiments have been carried out. The difference between comparative examples 1-8 and the embodiment is that the oblique cut inlet swirl flow The angle between the outer surface of the inlet of the separator 4 and the tangent plane of the outer circumferential surface of the annular pipe 3 is different, the included angle is θ, and θ is 10°, 20°, 30°, 40°, 50°, 70°, 80° respectively and 90°, Fig. 3 is a top view of the distributor after removing the beveled single-entry cyclone separator 4.

The difference between Comparative Example 9 and the embodiment is that the spiral guide vane 5 is not installed in Comparative Example 9, and FIG. 4 is a top view without the beveled single-entrance cyclone separator 4 and the spiral guide vane 5 .

The difference between Comparative Example 10, Comparative Example 11 and Comparative Example 12 and the examples is that the inclined-cut single-entrance cyclone separators of Comparative Example 10, Comparative Example 11 and Comparative Example 12 are 0 °, 10 ° and 15 ° °, Figures 5, 7, and 8 are schematic structural views of Comparative Example 10, Comparative Example 11 and Comparative Example 12, and Figure 6 is a structural schematic view of the oblique single-entry cyclone separator of the embodiment.

In the process of comparing Comparative Examples 1-9 with the Examples, ten oblique-cut single-entry cyclone separators 4 were removed in the calculation process for the convenience of calculation.

Experimental conditions of the examples and comparative examples: the inlet flows are both 100 m ³ /h.

Table 1 shows the comparison of the performance parameters of the distributor when the cyclone separator is installed at different tangential angles

The above table reflects the performance parameters of the distributor when the cyclone separator is installed at different tangential angles. It can be seen from the table that the outer surface of the inlet of the obliquely cut single-entrance cyclone separator 4 in this embodiment and the outer circumference of the annular pipe 3 The structure with an included angle of 60° between the tangent planes of the faces has lower pressure loss and more uniform flow distribution.

Table 2 shows the comparison of performance parameters between distributors without spiral guide vanes and distributors with spiral guide vanes installed

The above table reflects the performance parameters of the distributor when the spiral guide vane is not installed and when the spiral guide vane is installed. It can be seen from the table that the structure of the present embodiment with the spiral guide vane 5 has lower pressure loss and more uniform traffic distribution.

Table 3 is the comparison of pressure loss of cyclone separators under different tangential inlet angles

The above table reflects the pressure loss of the cyclone separator at different tangential inlet angles. It can be seen from the table that as the inlet angle increases, the pressure loss of the cyclone separator gradually decreases.

Figure 9 is the separation efficiency curves of Comparative Example 10, Comparative Example 11, Comparative Example 12 and Examples under different sludge particle sizes, and the sludge particle sizes are 10 μm, 20 μm, 30 μm, 40 μm, 50 μm and 60 μm, respectively. It can be seen that the embodiment has better separation efficiency than the comparative example 11 and the comparative example 12. It can be seen from the above analysis that the comprehensive performance of the embodiment is better than that of the comparative examples.

The above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. a compound cyclone separator, it is characterised in that include straight tube, is provided with guide vane in described straight tube, described directly It is tubaeform that pipe connection has open tubes, described open tubes, and described open tubes is arranged with commutator, and described commutator is taper, Forming V-arrangement cavity between described open tubes and commutator, described cavity connects with straight tube, and described cavity bottom connects annular Pipe, described ring pipe outer circumference uniformly connects and has several cyclone separators, described cyclone separator by connecting tube with Ring pipe connects.

The compound cyclone separator of one the most according to claim 1, it is characterised in that: the cone angle of described commutator and spiral shell The lead angle of rotation guide vane is consistent.

The compound cyclone separator of one the most according to claim 1, it is characterised in that: the cone angle of described commutator is than spacious The cone angle of mouth pipe is big.

The compound cyclone separator of one the most according to claim 1, it is characterised in that: described cyclone separator includes circle Post bucket, underflow pipe and Taper Pipe, described cylinder barrel, underflow pipe be arranged on the two ends of Taper Pipe, described cylinder barrel be plugged with overflow pipe, Cylinder barrel side connects connecting tube.

The compound cyclone separator of one the most according to claim 4, it is characterised in that: outside described connecting tube is with ring pipe The angle in periphery incisal plane is 60 °.

The compound cyclone separator of one the most according to claim 4, it is characterised in that: described connecting tube and cylindrical tube it Between entrance inclination angle be 5 °～15 °.

The compound cyclone separator of one the most according to claim 4, it is characterised in that: the cross section of described connecting tube is Rectangle, the ratio of length and width is 2:3.

The compound cyclone separator of one the most according to claim 4, it is characterised in that: the entrance of described cyclone separator Direction is consistent with ring pipe internal coiling flow path direction.

The compound cyclone separator of one the most according to claim 1, it is characterised in that: described guide vane is by four The pipe cyclone of helical blade composition, described four helical blades are circumferentially uniformly distributed, and cornerite is 90 °.

The compound cyclone separator of one the most according to claim 9, it is characterised in that: the spiral of described guide vane Lift angle is 45 °.