CN219424348U

CN219424348U - Hydrogen-introducing reduction device

Info

Publication number: CN219424348U
Application number: CN202223361051.6U
Authority: CN
Inventors: 王云; 邱路伟; 艾小军; 童培云
Original assignee: Vital Thin Film Materials Guangdong Co Ltd
Current assignee: Vital Thin Film Materials Guangdong Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-07-28
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a hydrogen-introducing reduction device, which aims to prepare a vacuum environment of a furnace tube by matching a water circulation pump and a dry pump, improve the vacuumizing efficiency and adopts the technical scheme that: the hydrogen-introducing reduction device comprises a hearth and two furnace tubes arranged in the hearth, wherein a flange seat for sealing the furnace tubes is arranged at the end parts of the furnace tubes, a gas inlet and a gas outlet are arranged on the flange seat, and the gas inlet is connected with a hydrogen conveying pipe; the vacuum furnace tube further comprises a vacuum pumping pipeline, the gas outlet is connected with the vacuum pumping pipeline, and the vacuum gauge, the water circulating pump and the dry pump are sequentially arranged along the direction away from the furnace tube, and the vacuum furnace tube belongs to the technical field of reduction equipment.

Description

Hydrogen-introducing reduction device

Technical Field

The utility model belongs to the technical field of reduction equipment, and particularly relates to a hydrogen-introducing reduction device.

Background

The existing hydrogen-introducing reduction treatment is generally realized by a vacuum heating furnace, materials are placed into a furnace tube, hydrogen is introduced after vacuumizing, and then the furnace tube is heated for reduction reaction.

For example, CN210180151U discloses a fully automatic hydrogen reduction furnace, which comprises a furnace tube penetrating through a heating hearth, wherein a tube orifice of the steel furnace tube is sealed by a high temperature resistant tube plug, and an air inlet tube communicated with the furnace tube is arranged through the high temperature resistant tube plug; the air inlet pipe is communicated with a hydrogen source, a nitrogen source and a vacuum pump through a hydrogen pipeline, a nitrogen pipeline and a vacuum pumping pipeline; the other pipe orifice of the furnace pipe extends out of the heating hearth and is sealed by the packaging flange;

the hydrogen reduction furnace is vacuumized by a vacuum pump, and the vacuum pump operates to pump out the gas in the furnace tube through a vacuumizing pipeline; only one furnace tube is arranged in the equipment, the efficiency of one vacuum pump can meet the preparation of the vacuum environment of one furnace tube, and in other equipment, two or more furnace tubes are sometimes arranged, the volume required to be vacuumized is increased, the efficiency of one vacuum pump is difficult to meet, and the vacuumized time is longer, so that the reaction is affected.

Disclosure of Invention

The utility model mainly aims to provide a hydrogen-introducing reduction device, which aims to prepare a vacuum environment of a furnace tube through the cooperation of a water circulation pump and a dry pump and improve the vacuumizing efficiency.

According to a first aspect of the utility model, there is provided a hydrogen-passing reduction device, comprising a furnace and two furnace tubes arranged in the furnace, wherein the ends of the furnace tubes are provided with flange seats for sealing the furnace tubes, the flange seats are provided with a gas inlet and a gas outlet, and the gas inlet is connected with a hydrogen conveying pipe;

the furnace tube vacuum pump further comprises a vacuum pumping pipeline, wherein the gas outlet is connected with the vacuum pumping pipeline, and the vacuum gauge, the water circulating pump and the dry pump are sequentially arranged in the direction away from the furnace tube of the vacuum pumping pipeline.

In the hydrogen introducing reduction device, a drying bottle is arranged on the vacuumizing pipeline between the water circulating pump and the dry pump, the drying bottle is connected with the vacuumizing pipeline in series, and soda lime is filled in the drying bottle.

In the hydrogen-introducing reduction device, the drying bottle is U-shaped.

In the hydrogen-introducing reduction device, two drying bottles are sequentially connected in series.

In the hydrogen introducing reduction device, an air inlet pipe communicated with the atmosphere is arranged on the vacuumizing pipeline, and an air charging valve is arranged on the air inlet pipe.

In the hydrogen-introducing reduction device, the flange seat is made of stainless steel, and a tetrafluoro coating is arranged on the surface of the flange seat.

In the hydrogen-introducing reduction device, the flange seat is provided with a cooling module for cooling the flange seat.

In the hydrogen-passing reduction device, the cooling module comprises a coil pipe wound on the periphery of the flange seat, and cooling liquid flows in the coil pipe.

In the hydrogen introducing reduction device, the vacuumizing pipeline is made of polytetrafluoroethylene.

One of the above technical solutions of the present utility model has at least one of the following advantages or beneficial effects:

according to the utility model, two furnace tubes are arranged, so that the holding capacity in the hydrogen-introducing reduction reaction can be improved, the vacuum environment of the furnace tubes is prepared by matching the water circulation pump and the dry pump, and the vacuumizing efficiency is improved;

the water circulation pump is operated independently to rapidly pump the gas in the furnace tube, and then the dry pump is operated independently to prepare higher vacuum degree, so that the vacuumizing efficiency is improved, and the vacuumizing time can be controlled within a preset time to enable the hydrogen-introducing reduction reaction to be carried out smoothly even if a plurality of furnace tubes exist.

Drawings

The utility model is further described below with reference to the drawings and examples;

fig. 1 is a schematic structural view of a first embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.

Referring to fig. 1, in one embodiment of the present utility model, a hydrogen-introducing reduction device includes a furnace 1 and two furnace tubes 2 disposed in the furnace 1, wherein a flange seat 3 for sealing the furnace tubes 2 is disposed at an end of the furnace tubes 2, a gas inlet 31 and a gas outlet 32 are disposed on the flange seat 3, and the gas inlet 31 is connected with a hydrogen delivery pipe;

the furnace tube furnace further comprises a vacuumizing pipeline 4, wherein a gas outlet 32 is connected with the vacuumizing pipeline 4, and the vacuumizing pipeline 4 is sequentially provided with a vacuum gauge 5, a water circulating pump 6 and a dry pump 7 along the direction away from the furnace tube 2;

the water circulation pump 6 is fast in air suction speed, the vacuum degree capable of being prepared is low, the dry pump 7 is slow in air suction speed, the vacuum degree capable of being prepared is high, when the device is in actual use, the water circulation pump 6 is operated independently, air in the furnace tube 2 is rapidly pumped away, and then the dry pump 7 is operated independently, so that the vacuum degree is higher, the vacuum suction efficiency is improved, the vacuum suction time can be controlled within a preset time even though the furnace tubes 2 are arranged, and the hydrogen-introducing reduction reaction is smoothly carried out.

When in use, firstly, the material to be reduced is placed into the furnace tube 2, and then the flange seat 3 is used for sealing the opening of the furnace tube 2; then the water circulation pump 6 is operated independently to pump air quickly, the vacuumizing pipeline 4 pumps the air in the furnace tube 2 through the air outlet 32, the vacuum gauge 5 is used for detecting the vacuum degree in the vacuumizing pipeline 4, the vacuum degree in the furnace tube 2 is consistent with the vacuum degree in the vacuumizing pipeline 4 because the furnace tube 2 is communicated with the vacuumizing pipeline 4 at the moment, when the vacuum gauge 5 detects that the vacuum degree is about 0.097Mpa, the water circulation pump 6 is used for exhausting most of the air, the water circulation pump 6 is difficult to reduce the vacuum degree again, the vacuum degree is switched to the dry pump 7 for vacuumizing immediately, the dry pump 7 is operated independently until the vacuum gauge 5 detects that the vacuum degree is about 5Mpa, and the vacuum degree at the moment meets the reaction requirement; the hydrogen conveying pipe conveys hydrogen into the furnace tube 2 through the gas inlet 31, and the furnace chamber 1 heats the furnace tube 2, so that the hydrogen-introducing reduction reaction can be performed.

In the embodiment, the hearth 1 is formed by a heating cylinder, the heating cylinder is hollow cylindrical, a hollow inner cavity of the heating cylinder forms the hearth 1, a resistance wire is arranged in the heating cylinder, and the resistance wire heats to heat the hearth 1, so that the furnace tube 2 is heated;

in this embodiment, two heating cylinders are provided to correspond to the two furnace tubes 2, and according to actual requirements, the heating temperatures of the two furnace tubes 2 can be controlled to be different.

When vacuumizing, the furnace tube 2 is dried as much as possible while vacuumizing gas so as to achieve better vacuum degree, water circulation pump 6 is used for rapidly vacuumizing gas, water vapor is remained in the furnace tube 2 and vacuumizing pipeline 4, and in order to treat the water vapor, a drying bottle 8 is arranged on the vacuumizing pipeline 4 between the water circulation pump 6 and the dry pump 7, the drying bottle 8 is connected with the vacuumizing pipeline 4 in series, and soda lime is contained in the drying bottle 8;

when the dry pump 7 is used for exhausting, gas can move to the dry pump 7 along the vacuumizing pipeline 4 and is discharged, the gas must pass through the drying bottle 8 when moving along the vacuumizing pipeline 4, the gas encounters soda lime in the drying bottle 8, and water vapor contained in the gas can be absorbed by the soda lime, so that drying is realized.

Meanwhile, in order to ensure that the water vapor can be absorbed by the soda lime, the flow path of the gas in the drying bottle 8 can be prolonged, so that the drying bottle 8 is designed into a U shape, and after the drying bottle 8 is connected to the vacuumizing pipeline 4, the gas needs to travel a U-shaped track when passing through the drying bottle 8, and can be fully contacted with the soda lime in the drying bottle 8, and the soda lime absorbs the water vapor.

Preferably, the drying bottles 8 are two and are sequentially connected in series, and the gas needs to sequentially pass through the two U-shaped drying bottles 8, so that the contact time of the gas and the soda lime can be further prolonged.

In the embodiment, an air inlet pipe 9 communicated with the atmosphere is arranged on the vacuumizing pipeline 4, and an air charging valve 91 is arranged on the air inlet pipe 9; after the reduction reaction is completed, the charging valve 91 may be opened to allow the atmosphere to be charged into the furnace tube 2 and the vacuum-pumping pipe 4, so as to avoid opening the flange seat 3 under the condition of negative pressure.

In this embodiment, the inflation valve 91 may be an anti-corrosive manual inflation valve, so as to avoid the inflation valve 91 from being corroded by hydrogen.

In this embodiment, the gas inlet 31 and the gas outlet 32 on the flange seat 3 are all provided with anti-corrosion valves, and when vacuum is pumped, the valve of the gas inlet 31 is closed and the valve of the gas outlet 32 is opened; when hydrogen is introduced, the valve of the gas inlet 31 is opened and the valve of the gas outlet 32 is closed.

Generally, the flange seat 3 is made of stainless steel, and in order to avoid corrosion of the flange seat 3 by hydrogen, a tetrafluoro coating is disposed on the surface of the flange seat 3;

however, when the furnace tube 2 is heated, the temperature of the flange seat 3 is correspondingly increased, and the tetrafluoro coating on the surface of the flange seat 3 can be damaged; then, a cooling module 10 for cooling the flange seat 3 is arranged on the flange seat 3 to protect the tetrafluoro coating from being damaged;

specifically, the cooling module 10 includes a coil wound around the outer periphery of the flange base 3, and a cooling liquid flows in the coil;

the flange seat 3 comprises a flange ring, one surface of the flange ring facing the furnace tube 2 is provided with an annular bulge, and when the flange ring is sealed and attached to the end part of the furnace tube 2, the annular bulge can be embedded into the furnace tube 2, and the flange ring is generally fixed on the end part of the furnace tube 2 through bolts; a hollow column body is arranged on one surface of the flange ring, which is opposite to the furnace tube 2, one surface of the column body, which is opposite to the furnace tube 2, is sealed, the inner cavity of the column body is communicated with the furnace tube 2, and a gas inlet 31 and a gas outlet 32 are both arranged on the column body;

the coil pipe is wound on the periphery of the column body and is attached to the column body, and when the cooling liquid flows in the coil pipe, the cooling liquid can absorb heat of the column body and take away the heat, so that the flange seat 3 is cooled;

one end of the coil pipe is a cooling liquid inlet, the other end of the coil pipe is a cooling liquid outlet, and a corresponding cooling liquid storage tank and a water pump are arranged, so that the cooling liquid storage tank, the water pump and the coil pipe form a circulation loop, and under the driving of the water pump, cooling liquid is input into the coil pipe from the cooling liquid storage tank to absorb heat, and the cooling liquid in the coil pipe can flow back into the cooling liquid storage tank for cooling, so that the circulation flow is realized.

In this embodiment, the cooling liquid is water.

In this embodiment, the evacuation pipe 4 is made of polytetrafluoroethylene, and is also used to prevent corrosion of hydrogen.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The hydrogen-introducing reduction device comprises a hearth and two furnace tubes arranged in the hearth, and is characterized in that flange seats for sealing the furnace tubes are arranged at the end parts of the furnace tubes, a gas inlet and a gas outlet are arranged on the flange seats, and the gas inlet is connected with a hydrogen conveying pipe;

2. The hydrogen-introducing reduction device according to claim 1, wherein a drying bottle is arranged on a vacuumizing pipeline between the water circulating pump and the dry pump, the drying bottle is connected with the vacuumizing pipeline in series, and soda lime is filled in the drying bottle.

3. The hydrogen passing reduction device according to claim 2, wherein the drying bottle is U-shaped.

4. A hydrogen-passing reduction apparatus according to claim 2 or 3, wherein the drying bottles are two and are connected in series in sequence.

5. The hydrogen-passing reduction device according to claim 1, wherein an air inlet pipe communicated with the atmosphere is arranged on the vacuumizing pipeline, and an air charging valve is arranged on the air inlet pipe.

6. The hydrogen passing reduction device according to claim 1, wherein the flange seat is made of stainless steel, and a tetrafluoro coating is provided on a surface of the flange seat.

7. The hydrogen-passing reduction apparatus according to claim 6, wherein a cooling module for cooling the flange seat is provided on the flange seat.

8. The hydrogen passing reduction device according to claim 7, wherein the cooling module includes a coil wound around an outer periphery of the flange seat, and a coolant flows in the coil.

9. The hydrogen-passing reduction apparatus according to claim 1, wherein the vacuumizing pipe is made of polytetrafluoroethylene.