Organic silicon slurry residue drying equipment

Abstract

The utility model discloses organic silicon slurry residue drying equipment which comprises a hot drying cylinder body and at least two stirring components, a feeding port and a discharging port are formed in the side wall of the hot drying cylinder body, a feeding hopper and a discharging pipe are arranged on the hot drying cylinder body, and the feeding hopper is communicated with the feeding port; the discharging pipe is communicated with the discharging opening; the stirring assembly is rotatably arranged on the hot drying cylinder body, so that the organic silicon pulp slag entering the hot drying cylinder body through the feeding hole is stirred through the stirring assembly; wherein the stirring assembly comprises a stirring shaft and a plurality of stirring blades arranged on the stirring shaft, the stirring blades are arranged in the length direction of the stirring shaft, each stirring blade comprises a plurality of sub-blades, and the sub-blades are arranged in the length direction of the stirring shaft; and the distance between the at least two stirring components is set as follows: the sub-blades of the two stirring components have coincident motion envelopes.

Description

Technical Field

[0001] The utility model relates to a drying device for silicone pulp residue, belonging to the technical field of chemical equipment. Background Art

[0002] During the production of silicone, pulp residue is generated while producing crude monomer products. The silicone pulp residue contains silicone monomers and silicon powder. The liquid phase mainly consists of disilane and high-boiling mixtures, and the solid phase mainly consists of silicon powder.

[0003] Since silicone monomers react with water to produce hydrogen chloride, and hydrogen chloride combines with water in the air to form hydrochloric acid, which is highly corrosive. At the same time, the reaction of monomers with water also produces hydrolyzates, which have a low flash point, strong corrosiveness, and produce colloids, easily clogging equipment. In terms of the solid phase, the Mohs hardness of metallurgical silicon is 9.5 (the Mohs hardness of diamond is 10). In industrial production, where there is metallurgical silicon, the sealing parts of equipment are prone to wear and leakage.

[0004] Therefore, it is necessary to develop a drying device for silicone pulp residue, and use this drying device to effectively evaporate and separate the liquid-phase monomers in the silicone pulp residue, achieve full separation of the solid phase and liquid phase of the pulp residue, recycle the liquid phase, and reduce the output of by-products in the production process of silicone. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a drying device for silicone pulp residue, which solves at least one of the above technical problems.

[0006] The utility model adopts the following technical solutions to solve the technical problems: A drying device for silicone pulp residue, which includes a hot drying cylinder body and at least two stirring components;

[0007] The side wall of the hot drying cylinder body is provided with a feeding port and a discharging port. A feeding hopper and a discharging pipe are arranged on the hot drying cylinder body. The feeding hopper is communicated with the feeding port; the discharging pipe is communicated with the discharging port; the stirring component is rotatably arranged in the hot drying cylinder body to stir the silicone pulp residue entering through the feeding port through the stirring component;

[0008] Wherein, the stirring component includes a stirring shaft and a plurality of stirring blades arranged on the stirring shaft. The stirring blades are arranged along the length direction of the stirring shaft, and each stirring blade includes a plurality of sub-blades. The length direction of the sub-blades is parallel to the length direction of the stirring shaft; the distance between the at least two stirring components is set such that the sub-blades of the two stirring components have overlapping movement envelopes.

[0009] Optionally, the hot drying cylinder body is a jacketed cylinder body.

[0010] Optionally, the sub - blades are arranged in contact with the inner surface of the hot - drying cylinder.

[0011] Optionally, an observation port is provided on the side wall of the hot - drying cylinder, the observation port is arranged facing upward, and a connecting cylinder is provided on the hot - drying cylinder. One end of the connecting cylinder communicates with the observation port; an observation mirror is provided at the other end of the connecting cylinder.

[0012] Optionally, a gas discharge port is provided on the side wall of the connecting cylinder.

[0013] Optionally, the multiple sub - blades of each stirring blade have different positions along the length direction of the stirring shaft. Description of the Drawings

[0014] Figure 1 is a schematic structural view of the organosilicon slurry residue drying equipment of the present utility model;

[0015] Figure 2 is a schematic structural view of the organosilicon slurry residue drying equipment of the present utility model from another angle;

[0016] Figure 3 is a schematic structural view of the organosilicon slurry residue drying equipment of the present utility model from another angle;

[0017] Figure 4 is a three - dimensional structural view of the organosilicon slurry residue drying equipment of the present utility model;

[0018] Figure 5 is a schematic internal structural view of the organosilicon slurry residue drying equipment of the present utility model;

[0019] Figure 6 is a schematic structural view of the stirring assembly of the organosilicon slurry residue drying equipment of the present utility model;

[0020] The reference signs in the drawings are shown as: 1 - hot - drying cylinder; 2 - stirring assembly; 21 - stirring shaft; 22 - stirring blade; 23 - sub - blade; 3 - feeding hopper; 4 - discharge pipe; 5 - connecting cylinder; 6 - observation mirror; 7 - baffle; 8 - mechanical seal; 9 - gas discharge port. Detailed Embodiments

[0021] The technical solutions of the present utility model will be further described below in conjunction with the embodiments and the drawings.

[0022] Embodiment 1

[0023] This embodiment provides an organosilicon slurry residue drying equipment, which includes a hot - drying cylinder 1 and two stirring assemblies 2.

[0024] A feed inlet is provided on the side wall of the hot drying cylinder 1, and a feeding hopper 3 is arranged on the hot drying cylinder 1, and the feeding hopper 3 is communicated with the feed inlet; thus, silicone slurry residue is provided into the hot drying cylinder 1 through the feeding hopper 3.

[0025] During actual use, the feed inlet of the hot drying cylinder 1 is arranged upward, so that the silicone slurry residue can flow into the interior of the hot drying cylinder 1 under the action of gravity. More preferably, a connecting pipeline is provided between the feeding hopper 3 and the hot drying cylinder 1, and a feed switch valve can be arranged on this connecting pipeline. In a specific embodiment, the feeding hopper 3 is a U-shaped hopper.

[0026] A discharge port is further arranged on the side wall of the hot drying cylinder 1, and the discharge port is communicated with a discharge pipe 4. Correspondingly, the discharge port of the hot drying cylinder 1 is arranged downward, so that the solid components in the silicone slurry residue can be discharged from the discharge pipe under the action of gravity.

[0027] Preferably, a discharge switch valve is arranged on the discharge pipe 4; when the heating and separation of the silicone slurry residue in the hot drying cylinder 1 are completed, this discharge switch valve can be opened, and the stirring assembly 2 can be controlled to rotate slowly, so as to discharge the solid components in the silicone slurry residue through the discharge pipe 4.

[0028] Meanwhile, when the solid components in the silicone slurry residue in the hot drying cylinder 1 are emptied, this discharge switch valve can be closed, and then the feed switch valve can be opened to add new silicone slurry residue into the hot drying cylinder 1 and start the next drying and separation operation.

[0029] The stirring assembly 2 is rotatably arranged in the hot drying cylinder 1 to stir the silicone slurry residue entering through the feed inlet through the stirring assembly 2.

[0030] The stirring assembly 2 in this embodiment is set to be more than two, so as to effectively stir the silicone slurry residue in the hot drying cylinder 1, and further prevent the silicone slurry residue from caking in the hot drying cylinder 1 and improve the drying and separation effect.

[0031] The stirring assembly 2 in this embodiment is preferably set to two. Of course, the number of the stirring assembly 2 can also be set to other values.

[0032] The stirring assembly 2 includes a stirring shaft 21 and a plurality of stirring blades 22 arranged on the stirring shaft 21. The stirring blades 22 are arranged at equal intervals along the length direction of the stirring shaft 21. And each stirring blade 22 includes a plurality of sub-blades 23. The sub-blades 23 are arranged along the length direction of the stirring shaft 21, that is, the length direction of the sub-blades 23 is parallel to the length direction of the stirring shaft 21. The distance between the axes of the at least two stirring assemblies 2 is set such that the sub-blades 23 of the two stirring assemblies 2 have overlapping motion envelopes, that is, along the circumferential direction of the stirring shaft 21, the sub-blades 23 arranged on the two stirring shafts 21 are staggered.

[0033] In this embodiment, four to six sub-blades 23 can be arranged on each stirring blade 22, and these four sub-blades 23 are arranged at equal intervals along the circumferential direction of the stirring shaft 21. Moreover, along the axial direction (length direction) of the stirring shaft 21, these four sub-blades 23 are arranged at different positions. Thus, the sub-blades 23 of each stirring assembly 2 can all contact the inner surface of the hot drying cylinder 1 without leaving gaps. In another embodiment, the sub-blades 23 of the same stirring blade 22 of the stirring assembly 2 are arranged at the same axial position of the stirring shaft 21.

[0034] In addition, the sub-blades 23 on the two stirring shafts 21 are arranged at different positions along the axial direction of the stirring shaft 21, that is to say, along the axial direction of the stirring shaft 21, the sub-blades 23 arranged on the two stirring shafts 21 are staggered.

[0035] In addition, the sub-blades 23 on one stirring shaft 21 are arranged at intervals from the outer peripheral surface of the stirring shaft 21. When the sub-blades 23 of the other stirring shaft 21 rotate, they can pass through this interval, thereby reducing the distance between the axes of the two stirring shafts 21.

[0036] In this embodiment, the hot drying cylinder 1 is a jacketed cylinder, that is, the hot drying cylinder 1 can be provided with at least one interface for introducing hot oil and at least one interface for discharging hot oil, so as to heat the side wall of the hot drying cylinder 1 through high-temperature heat-conducting oil and realize the drying of the silicone slurry residue.

[0037] The sub-blades 23 are arranged in contact with the inner surface of the hot drying cylinder 1. Specifically, different from the shape of the outer surface of the hot drying cylinder 1, the inner surface of the hot drying cylinder 1 in this embodiment is the same as the motion envelope of the sub-blades 23. Thus, the inner surface of the hot drying cylinder 1 can contact the sub-blades 23, and the solid components in the silicone slurry residue will not adhere to the inner surface of the hot drying cylinder 1.

[0038] During the actual use process, the silicone slurry residue is gradually heated under the stirring of the stirring assembly 2. Moreover, the silicone slurry residue drying equipment in this embodiment can ensure that the silicone slurry residue is always in a dynamic stirring state to prevent dead corners from caking.

[0039] An observation port is provided on the side wall of the hot drying cylinder 1, and the observation port is arranged upward. A connecting cylinder 5 is provided on the hot drying cylinder 1, and one end of the connecting cylinder 5 is communicated with the observation port; an observation mirror 6 is provided at the other end of the connecting cylinder 5, so as to observe the drying condition of the silicone slurry residue during the heating process through the observation mirror 6.

[0040] Meanwhile, a gas discharge port 9 is provided on the side wall of the connecting cylinder 5, so that the gas generated during the heating process of the silicone slurry residue can be discharged from the gas discharge port 9, and these gases can be condensed and collected, thereby realizing the separation and collection of the liquid phase in the silicone slurry residue.

[0041] Preferably, baffles 7 can be provided at both ends of the hot drying cylinder 1, and both ends of the stirring shaft 21 of the stirring assembly 2 are rotatably supported on the baffles 7. Moreover, the mechanical seal 8 between the stirring shaft 21 and the baffle 7 adopts a double-end face seal. The shaft sleeve material of the mechanical seal 8 is generally selected from silicon carbide and tetrafluoro materials; the sealing gasket is generally selected from rubber products resistant to 300 °C high temperature; before the temperature of the silicone slurry residue rises, lubricating and cooling oil needs to be supplemented to the mechanical seal through an oil seal tank to prevent the mechanical seal 8 from being damaged by high temperature. At the same time, in this embodiment, lubricating and cooling oil circulation cooling can also be carried out through water.

[0042] The stirring assembly 2 is driven to rotate by a speed reducer, and the stirring assembly 2 has the same rotation speed or different rotation speeds. During the stirring and rotating process, the slurry residue in the hot drying cylinder 1 can be continuously scraped, so that the slurry residue is turned over along the stirring direction. Moreover, in the silicone slurry residue drying equipment formed by the above structure, the two stirring assemblies 2 can have different speeds, so as to ensure no dead angle during the stirring and heating process of the silicone slurry residue and prevent the silicone slurry residue from caking. Preferably, each stirring assembly 2 is separately connected to a speed reducer.

[0043] A liquid flow path can be formed inside the stirring shaft 21 and the blade 22 of this embodiment, that is, its interior can be hollow, and hot oil is introduced through a rotary joint for heating, so that the silicone slurry residue is heated more evenly during the stirring and heating process.

[0044] A thermometer can also be provided inside the hot drying cylinder 1 of this embodiment to measure the temperature of the silicone slurry residue inside the hot drying cylinder 1 through the thermometer.

[0045] The silicone pulp residue drying equipment in this embodiment has a wide range of applications. It can achieve negative pressure operation or positive pressure operation. The operating pressure of the equipment is -90KPa - 15KPa, and it has good heat resistance and can operate at a temperature of 300°C. Through the double stirring components with different rotation speeds and the stirring components with heating functions, while fully ensuring the separation effect of pulp residue drying, the drying time is reduced. The equipment has good mechanical seal effect, low leakage rate and high drying continuity.

[0046] The sequence of the above embodiments is only for convenience of description and does not represent the superiority or inferiority of the embodiments.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An organosilicon slurry drying device, characterized in that: It includes a hot drying cylinder and at least two stirring components; The side wall of the hot drying cylinder is provided with a feed port and a discharge port, and the hot drying cylinder is provided with a feed hopper and a discharge pipe, the feed hopper is connected with the feed port; the discharge pipe is connected with the discharge port; the stirring assembly is rotatably arranged on the hot drying cylinder, so as to stir the organic silicon slurry residue entering through the feed port by the stirring assembly; In which, the stirring component includes a stirring shaft and a plurality of stirring blades arranged on the stirring shaft, the stirring blades are arranged along the length direction of the stirring shaft, and each stirring blade includes a plurality of sub-blades, the length direction of the sub-blades is parallel to the length direction along the stirring shaft; the distance between the at least two stirring components is set so that the sub-blades of the two stirring components have overlapping motion envelopes.

2. The organic silicon slurry drying equipment according to claim 1, characterized in that: The hot drying cylinder is a jacketed cylinder.

3. The organic silicon slurry drying equipment according to claim 1, characterized in that: The sub-blades are arranged in contact with the inner surface of the hot drying cylinder.

4. The organic silicon slurry drying equipment according to claim 1, characterized in that: An observation port is provided on the side wall of the hot drying cylinder body, and the observation port is arranged upward. A connecting cylinder is provided on the hot drying cylinder body, and one end of the connecting cylinder is connected to the observation port; an observation mirror is provided at the other end of the connecting cylinder.

5. The organic silicon slurry drying equipment according to claim 4, characterized in that: The side wall of the connecting tube is provided with a gas discharge port.

6. The organic silicon slurry drying equipment according to claim 1, characterized in that: The plurality of sub-blades of each stirring blade have different positions along the length direction of the stirring shaft.

Images