CN203564982U - Mixer - Google Patents

Abstract

The utility model discloses a mixer, which comprises an inner pipe, an outer pipe, a nozzle, a throat pipe, a mixing pipe and an outlet pipe; The inlet is inserted into the outer tube and the throat and points to the outlet of the throat; the outlet of the outer tube communicates with the inlet of the throat, and the outlet of the throat communicates with the inlet of the mixing tube, The outlet of the mixing tube communicates with the inlet of the outlet tube; the outlet of the throat and the inlet of the mixing tube are both smaller than the inlet of the throat and the outlet of the mixing tube. In the utility model, through the change of the flow path of the nozzle, the throat, the mixing pipe and the outlet pipe, it is beneficial to mix the fluid in the inner pipe and the outer pipe more evenly in the mixing pipe, so that the two materials can react evenly and inhibit Gel formation.

Description

a mixer

technical field

The utility model relates to a mixer, in particular to a mixer for producing silica sol.

Background technique

The silica sol used in the production of cracking catalysts is prepared by the contact reaction of inorganic acid and water glass. However, the reaction conditions for the reaction of water glass and inorganic acid to generate silica sol are relatively harsh. Only when the ratio of water glass and inorganic acid is suitable can silica sol be generated, otherwise silica gel may be formed. Therefore, the mixing speed and mixing effect of water glass and inorganic acid will affect The quality of silica sol.

At present, the production of silica sol is mainly prepared by mechanical stirring or high-speed mixing pump.

US3867308 discloses a method for preparing silica sol. First, part of the water glass solution is added to a stirred tank, then a mineral acid solution is quickly added, and then the remaining water glass solution is added in two batches. This method requires that the feeding speed must be very fast, otherwise it is easy to form silica gel or some gel blocks, which will affect the product quality. The method also has the problems of complicated preparation process, difficult control and incapable of continuous production.

US3957689 discloses a method for preparing silica sol. Water glass solution and inorganic acid solution are simultaneously pumped into a high-speed stirring mixer and rapidly mixed to prepare silica sol. This method requires high-speed stirring equipment, but the equipment and operation costs are high, the energy consumption is large, and the product production is unstable.

US4946814 discloses a kind of preparation method of silica sol, water glass solution and mineral acid solution are pumped into the high-speed shear mixing pump to quickly mix and prepare silica sol at the same time, this method needs high-speed shear mixing pump, and equipment investment is high, The energy consumption is high, and the equipment is relatively complicated and the production of products is unstable.

CN201342325 discloses a mixer for preparing silica sol, the mixer has one or two mixing chambers, the mixing effect is good, and silica sol can be prepared continuously and stably, but the mixer needs a larger mixing chamber, and the structure is not compact enough, Not suitable for industrial production.

It can be seen that in order to be able to industrially produce the silica sol used in the production of cracking catalysts, it is necessary to provide a new equipment for preparing silica sol.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a mixer for preparing silica sol used in cracking catalyst production.

In order to achieve the above object, the utility model provides a mixer, which comprises an inner pipe 1, an outer pipe 2, a nozzle 3, a throat 4, a mixing pipe 5 and an outlet pipe 6; the inner pipe 1 and the nozzle 3 communicates as one, and inserts the outer tube 2 and the throat 4 from the inlet of the outer tube 2 and points to the outlet of the throat 4; the outlet of the outer tube 2 and the throat 4 The inlet is communicated, the outlet of the throat pipe 4 is communicated with the inlet of the mixing pipe 5, and the outlet of the mixing pipe 5 is communicated with the inlet of the outlet pipe 6; the outlet of the throat pipe 4 is connected with the mixing pipe 5 The inlets are smaller than the inlet of the throat pipe 4 and the outlet of the mixing pipe 5 .

Preferably, the throat 4 is a truncated cone, and the ratio of the diameter of the outlet of the throat 4 to the diameter of the inlet of the throat 4 is 0.01-0.5:1.

Preferably, the inlet cone angle β of the throat pipe 4 is 5-175°.

Preferably, the mixing tube 5 is a truncated cone, and the outlet cone angle γ of the mixing tube 5 is 5-60°.

Preferably, the ratio of the length of the mixing tube 5 to the diameter of the inlet of the mixing tube 5 is 3-20:1.

Preferably, the nozzle 3 is a truncated cone, comprising a nozzle inlet 31, a nozzle body 32 and a nozzle outlet 33; the center of the section of the nozzle inlet 31 and the nozzle outlet 33 is located on the axis of the nozzle 3, the The ratio of the cross-sectional area of the nozzle inlet 31 to the nozzle outlet 33 is 2-200:1.

Preferably, the ratio of the vertical distance between the nozzle inlet 31 and the nozzle outlet 33 to the diameter of the nozzle inlet 31 is 0.5-3:1.

Preferably, the cone angle α of the nozzle 3 is 5-175°.

Preferably, the vertical distance from the nozzle outlet 33 to the outlet of the throat pipe 4 ensures that the cross-sectional area of the annular gap formed by the edge of the nozzle outlet 33 and the pipe wall of the throat pipe 4 is the same as that of the outer pipe 2 The ratio of the cross-sectional area is 0.4-0.6:1.

Preferably, the ratio of the cross-sectional area of the outer tube 2 to the inner tube 1 is 0.07-15:1.

Preferably, the inner tube 1 and the outer tube 2 are concentric sleeves with the same axis, and both have circular cross-sections.

Preferably, the outlet pipe 6 is an elbow with a circular cross section and an elbow angle δ of 5-175°.

Preferably, the mixer also includes a feed pipe 7 opening on the outer pipe 2 .

In the utility model, through the change of the flow path of the nozzle, the throat, the mixing pipe and the outlet pipe, it is beneficial to mix the fluid in the inner pipe and the outer pipe more evenly in the mixing pipe, so that the two materials can react evenly and inhibit Gel formation.

Other features and advantages of the present invention will be described in detail in the following specific embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, together with the following specific embodiments, are used to explain the utility model, but do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is the schematic diagram of the mixer of a kind of embodiment of the present utility model;

Fig. 2 is the sectional view of inner pipe, nozzle, outer pipe and outer pipe inlet of the utility model;

Fig. 3 is a structural schematic diagram of a nozzle of the present invention.

Explanation of reference signs

1 Inner tube 2 Outer tube 3 Nozzle 4 Throat

5 Mixing pipe 6 Outlet pipe 7 Feed pipe 31 Nozzle inlet

32 nozzle body 33 nozzle outlet

Detailed ways

Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

The term cross-sectional area used in the present invention refers to the area of the cross-section of the inner diameter of the pipe. The term inner diameter refers to the diameter of the inner wall of the pipe and outer diameter refers to the diameter of the outer wall of the pipe.

The utility model provides a mixer, as shown in Figure 1, the mixer comprises an inner tube 1, an outer tube 2, a nozzle 3, a throat 4, a mixing tube 5 and an outlet tube 6; the inner tube 1 and the Nozzle 3 communicates as a whole, and inserts described outer pipe 2 and described throat pipe 4 from the inlet of described outer pipe 2 and points to the outlet of described throat pipe 4; The inlet of the throat is connected, the outlet of the throat pipe 4 is connected with the inlet of the mixing pipe 5, and the outlet of the mixing pipe 5 is connected with the inlet of the outlet pipe 6; the outlet of the throat pipe 4 is connected with the mixing pipe 5 inlets are smaller than the inlet of the throat 4 and the outlet of the mixing tube 5 .

In the utility model, from the inner pipe 1 and the nozzle 3 to the throat pipe 4 and then to the mixing pipe 5, the area of the cross section of the formed fluid channel is changed, which is beneficial to flow from the inner pipe 1 and the outer pipe 2 into the throat pipe 4 and the mixing pipe 5. The fluid in the mixing tube 5 is more uniformly mixed therein, suppressing the generation of gel.

According to the present invention, as shown in FIG. 2 , the nozzle 3 is connected to the front end of the inner tube 1 , and the outer diameter of the inner tube 1 is smaller than the inner diameter of the outer tube 2 . The inner tube 1 and the nozzle 3 are placed inside the outer tube 2, and preferably, the inner tube 1 and the outer tube 2 are concentric sleeves with the same axis, and the cross-sections are circular shape. Preferably, the inner tube 1, the outer tube 2 and the nozzle 3 have the same axis.

According to the utility model, as shown in Figure 3, preferably, the nozzle 3 is a truncated cone, including a nozzle inlet 31, a nozzle body 32 and a nozzle outlet 33; The center of circle is located on the axis of the nozzle 3, the ratio of the cross-sectional area of the nozzle inlet 31 and the nozzle outlet 33 is 2-200:1, preferably 7-100:1, more preferably 12-60: 1. The inlet 31 of the nozzle communicates with the outlet of the inner tube 1 , preferably with equal diameters.

According to the present invention, preferably, the ratio of the vertical distance between the nozzle inlet 31 and the nozzle outlet 33 to the diameter of the nozzle inlet 31 is 0.5-3:1.

According to the present invention, preferably, the cone angle α of the nozzle 3 is 5-175°, preferably, the cone angle α is 30-120°.

In the utility model, the nozzle can be connected with the inner pipe through welding or threaded connection, and can also be integrated with the inner pipe.

According to the present utility model, preferably, the vertical distance from the nozzle outlet 33 to the outlet of the throat pipe 4 ensures that the cross-sectional area of the annular gap formed by the edge of the nozzle outlet 33 and the pipe wall of the throat pipe 4 The ratio to the cross-sectional area of the outer tube 2 is 0.4-0.6:1; preferably 0.5:1, which can ensure that the fluid in the outer tube 2 flows through the periphery of the nozzle.

According to the present invention, preferably, the throat 4 is a truncated cone, and the ratio of the diameter of the outlet of the throat 4 to the diameter of the inlet of the throat 4 is 0.01-0.5:1.

According to the present invention, preferably, the inlet cone angle β of the throat pipe 4 is 5-175°, preferably, the inlet cone angle β is 40-120°.

According to the present invention, preferably, the mixing tube 5 is a truncated cone, and the outlet cone angle γ of the mixing tube 5 is 5-60°, preferably, the outlet cone angle γ is 5-15°.

According to the utility model, preferably, the ratio of the length of the mixing tube 5 to the diameter of the inlet of the mixing tube 5 is 3-20:1, preferably, the ratio of the diameters is 3-10:1, more preferably Earth, the diameter ratio is 6:1.

According to the present invention, preferably, the ratio of the cross-sectional area of the outer tube 2 to the inner tube 1 is 0.07-15:1, preferably, the ratio of the cross-sectional area is 0.3-3:1.

According to the present invention, preferably, the outlet pipe 6 is an elbow with a circular cross section, and the angle δ of the elbow is 5-175°, preferably, the angle δ of the elbow is 30-120°.

According to the present invention, preferably, the mixer further includes a feed pipe 7 opening on the outer pipe 2 .

According to the utility model, a preferred embodiment includes: the inner diameter of the inner pipe 1 is 5-50mm, more preferably 10-40mm; the inner diameter of the nozzle outlet 33 is 3-15mm, the inner diameter of the outer pipe 2 is 20-80mm, the nozzle The cone angle α of 3 is 35-50°.

The mixer provided by the utility model can also include other components, for example, flanges can also be included at the inlet and outlet of the material, so as to disassemble the mixer with pipelines and equipment; of course, the mixer can also be connected with the material delivery pipe by welding The road is connected to the device. The mixer may also include supports to facilitate installation and fixation of the equipment.

The working process of the mixer provided by the utility model is illustrated below in conjunction with Fig. 1 .

The silica sol is prepared with a water glass solution with a silicon dioxide content of 15% by weight and a dilute sulfuric acid solution with a concentration of 18% by weight. Water glass enters from the inlet of the inner pipe 1 and flows out from the nozzle outlet 33 into the inlet of the throat 4 by pumping. At the same time, through pumping, dilute sulfuric acid is added to the outer pipe 2 from the feed pipe 7, and the passage gap formed between the outer pipe 2, the inner pipe 1 and the nozzle 3 flows to the inlet of the throat pipe 4. The water glass flowing out of the nozzle 33 contacts and mixes with the dilute sulfuric acid from the outer pipe 2 and enters the throat pipe 4 together, then flows through the mixing pipe 5, and is discharged from the outlet pipe 6 to obtain a stable silica sol without gel blocks, silica The content is 10%, the pH value is 1.8, and the gelation time at room temperature is 16 hours.

The preferred embodiment of the utility model has been described in detail above, but the utility model is not limited to the specific details in the above embodiment, and within the scope of the technical concept of the utility model, various simple modifications can be made to the technical solution of the utility model , these simple modifications all belong to the protection scope of the present utility model.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner if there is no contradiction, and the present utility model will not further explain various possible combinations. .

In addition, any combination of various implementations of the present invention can also be made, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (13)

1. a blender, this blender comprises inner tube (1), outer tube (2), nozzle (3), trunnion (4), mixing tube (5) and outlet (6); Described inner tube (1) and described nozzle (3) are communicated as one, and insert described outer tube (2) and described trunnion (4) and point to the outlet of described trunnion (4) from the entrance of described outer tube (2); The outlet of described outer tube (2) is communicated with the entrance of described trunnion (4), and the outlet of described trunnion (4) is communicated with the entrance of described mixing tube (5), and the outlet of described mixing tube (5) is communicated with the entrance of described outlet (6); The entrance of the outlet of described trunnion (4) and described mixing tube (5) is all less than the outlet of entrance and the described mixing tube (5) of described trunnion (4).

2. blender according to claim 1, is characterized in that, described trunnion (4) is the frustum of a cone, and the diameter ratio of the entrance of the diameter of the outlet of described trunnion (4) and described trunnion (4) is 0.01-0.5:1.

3. blender according to claim 1, is characterized in that, the entrance cone angle beta of described trunnion (4) is 5-175 °.

4. blender according to claim 1, is characterized in that, described mixing tube (5) is the frustum of a cone, and the outlet cone angle gamma of described mixing tube (5) is 5-60 °.

5. blender according to claim 1, is characterized in that, the diameter ratio of the entrance of the length of described mixing tube (5) and described mixing tube (5) is 3-20:1.

6. according to the blender described in any one in claim 1-5, it is characterized in that, described nozzle (3) is the frustum of a cone, comprises nozzle inlet (31), nozzle body (32) and jet expansion (33); The center of circle in the cross section of described nozzle inlet (31) and described jet expansion (33) is positioned on the axis of described nozzle (3), and the ratio of the sectional area of described nozzle inlet (31) and described jet expansion (33) is 2-200:1.

7. blender according to claim 6, is characterized in that, the vertical range between described nozzle inlet (31) and described jet expansion (33) and the diameter ratio of described nozzle inlet (31) are 0.5-3:1.

8. blender according to claim 6, is characterized in that, the cone angle of described nozzle (3) is 5-175 °.

9. blender according to claim 8, it is characterized in that, described jet expansion (33) is to the vertical range assurance of the outlet of described trunnion (4), and the sectional area of annular space that the tube wall of the edge of described jet expansion (33) and described trunnion (4) forms and the ratio of the sectional area of described outer tube (2) are 0.4-0.6:1.

10. blender according to claim 1, is characterized in that, described outer tube (2) is 0.07-15:1 with the ratio of the sectional area of described inner tube (1).

11. according to the blender described in claim 1 or 10, it is characterized in that, described inner tube (1) is the identical concentric tubes in axle center with described outer tube (2), and cross section is circle.

12. blenders according to claim 1, is characterized in that, described outlet (6) is bend pipe, and cross section is circular, and angle of bend δ is 5-175 °.

13. blenders according to claim 1, is characterized in that, this blender also comprises the feed pipe (7) being opened on described outer tube (2).

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