CN218516668U

CN218516668U - Nitrogen replacement system for reduction reaction chamber of suspension roasting furnace

Info

Publication number: CN218516668U
Application number: CN202222902751.5U
Authority: CN
Inventors: 颜佩明; 高海啸; 任多振
Original assignee: Shanghai Fengshi Technology Co ltd
Current assignee: Shanghai Fengshi Engineering Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-02-24
Anticipated expiration: 2032-11-02

Abstract

A nitrogen replacement system for a reduction reaction chamber of a suspension roasting furnace comprises a nitrogen storage tank, a main pipeline, a branch pipeline A and a branch pipeline B; the main pipeline is connected with a nitrogen storage tank, and the nitrogen storage tank is provided with a safety valve, a drain valve and a gas transmission check valve; one end of the branch pipeline A is connected to the main pipeline, and the other end of the branch pipeline A is connected with the R01A/B reaction chamber; a nitrogen storage tank pressure transmitter, a mechanical pressure gauge, a pneumatic cut-off valve a, a pressure reducing valve and a nitrogen main pipe pressure transmitter are arranged on the main pipe; the branch pipeline A is provided with a pneumatic stop valve b, a pneumatic stop valve c, a flow meter and a pneumatic regulating valve d; the branch pipeline B is connected with the R01A/B reducing gas main pipeline through pneumatic stop valves e and f. The nitrogen replacement system can ensure that a neutral gear period that no nitrogen and reducing gas enter the reaction chamber is not generated during early replacement, and the safety risk that high-temperature air enters the reaction chamber in the neutral gear period due to failure of gas locking equipment of the reaction chamber is avoided; in emergency, a large amount of nitrogen can be sent into the R01 reaction chamber for replacement in a short time, and the safety of the whole system is guaranteed.

Description

Nitrogen replacement system for reduction reaction chamber of suspension roasting furnace

Technical Field

The utility model relates to a suspension magnetization calcination technical field, especially a nitrogen gas replacement system of reduction reaction chamber of suspension roasting furnace.

Background

The interior of a reduction reaction chamber (hereinafter abbreviated as R01A/B) of a conventional suspension roaster is a reducing atmosphere (such as CO and H) during operation ₂ ) If the oxygen in the R01A/B reaction chamber is not sufficiently replaced by the reducing gas before the reducing gas is introduced, explosion may occur when the reducing gas is introduced. Therefore, the R01A/B reaction chamber needs to be replaced with an inert gas in the early stage of production. The inert gas is generally nitrogen. The nitrogen is chemically inert, colorless, tasteless, convenient and easily available.

In the conventional nitrogen replacement system, nitrogen and reducing gas are introduced into an R01A/B reaction chamber through the same mother pipe (as shown in FIG. 1). As the nitrogen system is required to be closed when the reducing gas is input, a neutral period that no nitrogen and reducing gas enter the R01A/B reaction chamber exists, the R01A/B reaction chamber is in a negative pressure state, and although the front end and the rear end of the R01A/B reaction chamber are provided with the air locking devices, if the air locking devices fail, high-temperature air enters the R01A/B reaction chamber in the neutral period, so that safety risk is brought.

SUMMERY OF THE UTILITY MODEL

The utility model aims at improving the existing suspension roasting furnace reduction reaction chamber nitrogen gas replacement system, providing a suspension roasting furnace reduction reaction chamber nitrogen gas replacement system after the improvement to solve the above-mentioned technical problem that the existing suspension roasting furnace reduction reaction chamber nitrogen gas replacement system exists.

The utility model provides a nitrogen replacement system of a reduction reaction chamber of a suspension roasting furnace, wherein a nitrogen pipeline comprises a nitrogen storage tank, a main pipeline, a branch pipeline A and a branch pipeline B; the main pipeline is connected with the nitrogen storage tank, and the nitrogen storage tank is provided with a safety valve, a drain valve and a gas transmission check valve; one end of the branch pipeline A is connected to the main pipeline, and the other end of the branch pipeline A is connected with the R01A/B reaction chamber; a nitrogen storage tank pressure transmitter (for monitoring the pressure of the nitrogen storage tank), a mechanical pressure gauge (for monitoring the pressure of the nitrogen storage tank), a pneumatic stop valve a (for controlling the switch of the whole nitrogen system), a pressure reducing valve (for reducing the pressure of the nitrogen to the pressure required by the system) and a nitrogen main pipe pressure transmitter (for monitoring the pressure of the nitrogen system after pressure reduction) are sequentially arranged on the main pipeline from front to back; a pneumatic stop valve b, a pneumatic stop valve c (a switch for controlling nitrogen in the branch pipeline), a flowmeter (for detecting the flow of the nitrogen) and a pneumatic regulating valve d (for controlling the flow of the nitrogen) are sequentially arranged on the branch pipeline A from front to back; the branch pipeline B is connected with the R01A/B reducing gas main pipeline through a pneumatic stop valve e and a pneumatic stop valve f, and the R01A/B reducing gas main pipeline is connected with the R01A/B reaction chamber reducing gas pipeline.

Compared with the prior art, the utility model has the advantages of it is following:

1. the nitrogen replacement system can ensure that a neutral gear period when no nitrogen and reducing gas enter the R01A/B reaction chamber can not be generated during early replacement, thereby avoiding the safety risk that high-temperature air enters the R01A/B reaction chamber in the neutral gear period due to failure of the gas locking equipment of the R01A/B reaction chamber.

2. The nitrogen displacement system can accurately control the displacement air volume and time.

3. The nitrogen replacement system can send a large amount of nitrogen into the R01A/B reaction chamber for replacement in a short time under emergency, and the safety of the whole system is guaranteed.

Drawings

FIG. 1 is a schematic diagram of the configuration of a prior art nitrogen displacement system prior to modification;

fig. 2 is a schematic structural diagram of the nitrogen displacement system of the present invention after improvement.

In the figure: the device comprises a gas transmission check valve 1, a safety valve 2, a nitrogen storage tank 3, a drain valve 4, a nitrogen storage tank pressure transmitter 5, a mechanical pressure gauge 6, a pneumatic cutoff valve 7, a pressure reducing valve 8, a nitrogen header pressure transmitter 9, a main pipeline 10, a branch pipeline 21, a pneumatic cutoff valve 22, a pneumatic cutoff valve 23, a flow meter 24, a pneumatic adjusting valve 25, a reaction chamber reducing gas pipeline 26-R01A/B, a branch pipeline 31, a pneumatic cutoff valve 32, a pneumatic cutoff valve 33, and a reducing gas main pipeline 34-R01A/B.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The attached drawing is the structure schematic diagram of the embodiment of the utility model (including eight reduction reaction chambers of R01A and R01B difference), wherein FIG. 1 is the structure schematic diagram of the suspension roasting furnace reduction reaction chamber nitrogen gas replacement system before improving, and FIG. 2 is the structure schematic diagram of the nitrogen gas replacement system of the utility model after improving.

With reference to fig. 2, the nitrogen gas pipeline of the improved nitrogen gas replacement system of the present invention includes a nitrogen gas storage tank 3, a main pipeline 10, a branch pipeline a21 and a branch pipeline B31; the main pipeline 10 is connected with the nitrogen storage tank 3, and the nitrogen storage tank is provided with a safety valve 2, a drain valve 4 and a gas transmission check valve 1; one end of the branch pipeline A21 is connected to the main pipeline, and the other end of the branch pipeline A21 is connected with the R01A/B reaction chamber; a nitrogen storage tank pressure transmitter 5 (for monitoring the pressure of the nitrogen storage tank), a mechanical pressure gauge 6 (for monitoring the pressure of the nitrogen storage tank), a pneumatic cut-off valve a7 (for controlling the on-off of the whole nitrogen system), a pressure reducing valve 8 (for reducing the pressure of the nitrogen to the pressure required by the system) and a nitrogen header pipe pressure transmitter 9 (for monitoring the pressure of the nitrogen system after pressure reduction) are sequentially arranged on the main pipeline 10 from front to back; a pneumatic cut-off valve b22, a pneumatic cut-off valve c23 (for controlling the opening and closing of nitrogen in the branch pipeline), a flow meter 24 (for detecting the flow of nitrogen) and a pneumatic regulating valve d25 (for controlling the flow of nitrogen) are sequentially arranged on the branch pipeline A21 from front to back; the branch pipeline B31 is connected with an R01A/B reducing gas main pipeline 34 through a pneumatic stop valve e32 and a pneumatic stop valve f33, and the R01A/B reducing gas main pipeline is respectively connected with eight R01A/B reaction chamber reducing gas pipelines 26 of the R01A/B.

The utility model discloses a theory of operation:

when the system normally works, the pneumatic stop valve e and the pneumatic stop valve f of the branch pipeline B are always in a closed state, and the branch pipeline B is not communicated. Opening a main pipeline and a branch pipeline A of nitrogen, and performing nitrogen replacement before reduction gas is fed into the R01A/B reaction chamber (each reaction chamber can be independently subjected to replacement operation); after the early-stage replacement is completed, the reducing gas can be fed in before the nitrogen system is closed, and then the nitrogen is closed, so that a neutral gear stage that no nitrogen or reducing gas enters the R01A/B reaction chamber in the nitrogen replacement system shown in figure 1 can not be generated, and the safety risk that high-temperature air enters the R01A/B reaction chamber in the neutral gear stage due to the failure of a gas locking device of the R01A/B reaction chamber is avoided.

When the main induced draft fan is in failure, the reduction chamber is leaked, the nitrogen pipeline is leaked, the pressure of the reduction gas is insufficient and other emergency situations occur on site, the monitoring equipment on site sends out signals, the emergency replacement system enables the pneumatic stop valve e and the pneumatic stop valve f of the branch pipeline B to be automatically opened, the main nitrogen pipeline and the branch pipeline B are opened, a large amount of nitrogen is sent into the R01A/B reaction chamber for replacement in a short time through the main reduction gas pipeline, and the safety of the whole system can be guaranteed.

Claims

1. The utility model provides a nitrogen gas replacement system of reduction reaction chamber of suspension roasting furnace which characterized in that: the nitrogen pipeline of the nitrogen replacement system comprises a nitrogen storage tank (3), a main pipeline (10), a branch pipeline A (21) and a branch pipeline B (31); the main pipeline (10) is connected with the nitrogen storage tank (3), and the nitrogen storage tank is provided with a safety valve (2), a drain valve (4) and a gas transmission check valve (1); one end of the branch pipeline A (21) is connected with the main pipeline, and the other end of the branch pipeline A is connected with the R01A/B reaction chamber; a nitrogen storage tank pressure transmitter (5), a mechanical pressure gauge (6), a pneumatic cut-off valve a (7), a pressure reducing valve (8) and a nitrogen header pipe pressure transmitter (9) are sequentially arranged on the header pipe from front to back; a pneumatic cut-off valve b (22), a pneumatic cut-off valve c (23), a flowmeter (24) and a pneumatic regulating valve d (25) are sequentially arranged on the branch pipeline A (21) from front to back; the branch pipeline B (31) is connected with an R01A/B reducing gas main pipeline (34) through a pneumatic stop valve e (32) and a pneumatic stop valve f (33), and the R01A/B reducing gas main pipeline is connected with an R01A/B reaction chamber reducing gas pipeline (26).