CN110812863A

CN110812863A - Device for heating and dewatering aerial fog hydrophobic inert material

Info

Publication number: CN110812863A
Application number: CN201810908872.6A
Authority: CN
Inventors: 鲍宁; 罗长锋; 裴天军; 张永波; 李明晓
Original assignee: Shanghai Leader Catalyst Co Ltd
Current assignee: Shanghai Leader Catalyst Co Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-02-21

Abstract

The invention relates to a device for heating and dewatering an aerosol hydrophobic inert material, which comprises a silica gel raw material tank, a thickening tank and vacuum equipment which are sequentially connected, wherein the bottom of the thickening tank is provided with an air inlet, the air inlet is connected with a high-temperature nitrogen generator, the top of the thickening tank is provided with an exhaust valve, and the thickening tank is internally provided with a heating coil. Compared with the prior art, the silica gel is heated in two modes, and the heat sources of the two heating modes come from the same high-pressure steam, so that the cost of the heat source is saved while the water removal effect is good; in addition, through stirring and a plurality of high temperature nitrogen gas import, improve dewatering efficiency.

Description

Device for heating and dewatering aerial fog hydrophobic inert material

Technical Field

The invention relates to the technical field of silica gel production, in particular to a device for heating and dewatering an aerosol hydrophobic inert material.

Background

Silica gel is often used as a carrier or thickener in chemical production, where silica gel is an aerosol with a density of about 50kg/M3 and is readily dispersed in air, and where silica gel is typically introduced into the equipment by vacuum suction, it carries moisture into the air during the process of entering the production equipment, which has a significant effect on the product properties and needs to be removed as much as possible.

200320101585.3A carrier activating furnace, which uses heating wires to wrap the cylinder of the device and the bottom is filled with nitrogen to remove water in a fluidization mode, has the defects that the cylinder needs to be designed very large for the inert material with very low density and gas fog hydrophobicity, thus causing large equipment investment and high operating cost, and simultaneously, silica gel is easy to be adsorbed on the wall of the device and is difficult to unload completely.

CN 202254689U invented a silica gel dewatering device, which comprises a conveyor belt, and is characterized in that the bottom of the tail end of the conveyor belt is fixedly connected with an air suction cover, the side surface of the air suction cover is connected with one side of a cyclone dust collector through a connecting pipe, and the other side of the cyclone dust collector is connected with a fan through a connecting pipe. However, this method is not suitable for aerosols with lower density and lower moisture content.

In CN205435406, through improving the structure of a nitrogen pipeline, the range of action of the nitrogen pipeline is enlarged, nitrogen enters an annular nozzle in the kettle through a conduit at the bottom of the kettle, and the conduit and the annular nozzle are provided with a gas orifice for improving the dehydration efficiency. However, the aerosol with low density is easily adsorbed on the outer walls of the guide pipe and the ring pipe, and the entering nitrogen is preheated, so that the moisture in the silica gel is easily condensed on the outer walls of the guide pipe and the ring pipe to block the air injection holes.

CN202770114 is an electrically heated powder dehydrator, which is suitable for high temperature condition without manual or mechanical stirring equipment. Under the condition of low temperature, the silica gel is continuously heated electrically, so that the energy consumption is relatively high, and the cost is increased.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a device suitable for heating and dewatering low-density aerosol hydrophobic inert materials.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a device of aerial fog hydrophobicity inert material intensification dewatering, the device is including connecting gradually silica gel head tank, thickening jar and vacuum apparatus, the bottom of thickening jar is equipped with the air inlet, the air inlet is connected with high temperature nitrogen generator, and the top of thickening jar is equipped with discharge valve, be equipped with heating coil in the thickening jar. According to the invention, the silica gel is heated by the heating coil and the high-temperature nitrogen introduced into the thickening tank, so that the water is evaporated and is discharged out of the thickening tank along with the nitrogen, thereby achieving the aim of removing water.

The high-temperature gas generator comprises a high-purity nitrogen tank and a heat exchanger which are sequentially connected, and the heat exchanger is connected with the gas inlet. High purity nitrogen is heated to above 100 ℃ in a heater and then enters a thickening tank.

The heat exchanger is a shell-and-tube heat exchanger, the high-purity nitrogen tank is connected with a tube side inlet of the heat exchanger, a tube side outlet of the heat exchanger is connected with an air inlet, and a shell side inlet of the heat exchanger is connected with high-pressure steam.

And the outlet of the shell pass is connected with the inlet of the heating coil. The arrangement can make full use of the heat of the high-pressure steam.

And the outlet of the heating coil is provided with a condensation discharge port.

Thickening jar include inner wall and outer wall, treat that the aerial fog hydrophobicity inert material of dewatering places in the space that the inner wall formed, heating coil sets up in the inner wall outside, the air inlet sets up in the outer wall bottom, the lateral wall of inner wall is equipped with a plurality of through-holes, the through-hole passes through the pipeline and is connected with the air inlet, can set up gas distribution device at the air inlet moreover, the control flow that gets into the high temperature nitrogen gas of every pipeline can effectively improve dewatering efficiency.

The thickening jar in be equipped with the stirring rake, the stirring rake can stir silica gel, increases the area of contact of gas and silica gel, reduces the cost of equipment production.

Compared with the prior art, the beneficial effects of the invention are embodied in the following aspects:

(1) the silica gel is heated by two modes, and heat sources of the two heating modes come from the same high-pressure steam, so that the cost of the heat source is saved while the water outlet effect is good;

(2) through the setting of stirring and gas distributor, improve dewatering efficiency.

Drawings

FIG. 1 is a schematic diagram of the connection of the present invention.

Wherein, 1 is silica gel head tank, 2 is the thickening jar, 3 is vacuum apparatus, 4 is discharge valve, 5 is the air inlet, 6 is high-pressure steam, 7 is high-purity nitrogen gas jar, 8 is the heat exchanger, 9 is the outer wall, 10 is the inner wall, 11 is heating coil, 12 is body distributor, 13 is row and congeals the mouth.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Example 1

The utility model provides a device of aerosol hydrophobicity inert material intensification dewatering, its structure is shown in figure 1, including connecting gradually silica gel head tank 1, thickening jar 2 and vacuum apparatus 3, the bottom of thickening jar 2 is equipped with air inlet 5, and air inlet 5 is connected with high temperature nitrogen generator, and the top of thickening jar 2 is equipped with discharge valve 4, is equipped with heating coil 11 in the thickening jar 2. According to the invention, the silica gel is heated by the heating coil 11 and the high-temperature nitrogen introduced into the thickening tank 2, so that the water is evaporated and is discharged out of the thickening tank 2 along with the nitrogen, thereby achieving the aim of removing water.

The high-temperature gas generator comprises a high-purity nitrogen gas 7 tank and a heat exchanger 8 which are sequentially connected, and the heat exchanger 8 is connected with the gas inlet 5. High purity nitrogen gas 7 is heated to above 100 ℃ in a heater and then enters the thickening tank 2.

The heat exchanger 8 is a shell-and-tube heat exchanger 8, the high-purity nitrogen 7 tank is connected with a tube side inlet of the heat exchanger 8, a tube side outlet of the heat exchanger 8 is connected with the air inlet 5, and a shell side inlet of the heat exchanger 8 is connected with the high-pressure steam 6.

The outlet of the shell side is connected to the inlet of the heating coil 11. This arrangement makes it possible to make full use of the heat of the high-pressure steam 6.

The outlet of the heating coil 11 is provided with a condensate outlet 13.

Thickening jar 2 includes inner wall 10 and outer wall 9, treats that the aerial fog hydrophobicity inert material of dewatering places in the space that inner wall 10 formed, and heating coil 11 sets up in inner wall 10 outsidely, and air inlet 5 sets up in outer wall 9 bottoms, and the lateral wall of inner wall 10 is equipped with a plurality of through-holes, and the through-hole passes through the pipeline to be connected with air inlet 5, can set up gas distribution device 12 at air inlet 5 in addition, and the control gets into the flow of the high temperature nitrogen gas of every pipeline, can effectively improve dewatering efficiency.

The thickening jar 2 is equipped with the stirring rake (not shown in the figure), and the stirring rake can stir silica gel, increases the area of contact of gaseous and silica gel, reduces the cost of equipment production.

After silica gel raw materials are pumped into the thickening agent tank 2 in a post-vacuum mode, high-purity nitrogen heated to 110 ℃ is used for displacement for 30 times in a pressure range of 0.05 MPa-0.3 MPa, and then the oxygen content is measured to be 14.2ppm, the water content is 226ppm, and the reduction effect is obvious.

Claims

1. The utility model provides a device of aerial fog hydrophobicity inert material intensification dewatering, its characterized in that, the device is including connecting gradually silica gel head tank, thickening jar and vacuum apparatus, the bottom of thickening jar is equipped with the air inlet, the air inlet is connected with high temperature nitrogen generator, and the top of thickening jar is equipped with discharge valve, be equipped with heating coil in the thickening jar.

2. The device for raising the temperature and removing the water of the aerosol hydrophobic inert material according to claim 1, wherein the high-temperature gas generator comprises a high-purity nitrogen tank and a heat exchanger which are connected in sequence, and the heat exchanger is connected with the gas inlet.

3. The device for heating and dewatering the aerosol hydrophobic inert material according to claim 2, wherein the heat exchanger is a shell-and-tube heat exchanger, the high-purity nitrogen tank is connected with a tube side inlet of the heat exchanger, a tube side outlet of the heat exchanger is connected with an air inlet, and a shell side inlet of the heat exchanger is connected with high-pressure steam.

4. The device for raising the temperature and removing the water of the aerosol hydrophobic inert material according to claim 3, wherein the outlet of the shell side is connected with the inlet of the heating coil.

5. The device for raising the temperature and removing the water of the aerosol hydrophobic inert material as claimed in claim 1 or 4, wherein the outlet of the heating coil is provided with a condensation discharge port.

6. The device for warming and dewatering of the aerosol hydrophobic inert material according to claim 1, wherein the thickening tank comprises an inner wall and an outer wall, the aerosol hydrophobic inert material to be dewatered is placed in a space formed by the inner wall, the heating coil is arranged outside the inner wall, the air inlet is arranged at the bottom of the outer wall, a plurality of through holes are formed in the side wall of the inner wall, and the through holes are connected with the air inlet through a pipeline.

7. The device for raising the temperature and removing the water of the aerosol hydrophobic inert material according to claim 1, wherein a stirring paddle is arranged in the thickening tank.