Anti-blocking blast furnace pressure equalizing and diffusing system

Abstract

The utility model belongs to the technical field of blast furnace smelting, and particularly discloses an anti-blocking blast furnace pressure equalizing and diffusing system which comprises a blast furnace and a charging bucket, a distributor is arranged on the charging bucket and communicated with the blast furnace, one side of the charging bucket is communicated with a pressure equalizing and diffusing main pipe, and the pressure equalizing and diffusing main pipe is communicated with a pressure equalizing pipe and a diffusing pipe which are respectively provided with a valve. The pressure equalizing pipe is communicated with a clean gas storage tank, is communicated with a pressure equalizing branch pipe and a diffusion branch pipe and is respectively provided with a valve, and the pressure equalizing pipe is communicated with a nitrogen purging pipeline and is provided with a purging valve. In order to solve the problem that in the prior art, in the pressure equalizing process of a discharging tank, dust and scraps in raw materials adhere to a pipeline, and consequently the pipeline is blocked, the nitrogen purging device is arranged, and the pressure equalizing and diffusing branch is additionally arranged, so that the pressure equalizing and diffusing pipeline is cleaned, and the problem that in the pressure equalizing processing process during charging of the charging tank, the pipeline is blocked due to the fact that dust and scraps in the raw materials adhere to the pipeline is solved. And dust and scraps in the raw materials rush into the pipeline due to pressure difference and are adhered to the pipeline, so that the pipeline is blocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of blast furnace smelting technology, specifically relates to a prevent stifled blast furnace equalizing pressure diffusion system. BACKGROUND

[0002] In the blast furnace ironmaking production, coke, sintered ore, slagging material and the like are added into the blast furnace through the furnace top tank, and since the blast furnace top pressure is high, equalizing pressure treatment needs to be carried out during the tank charging process.If the equalizing pressure treatment is not carried out during the charging process, it may lead to uneven distribution of the materials, thereby affecting the smelting effect of the blast furnace and further reducing the production efficiency; and directly adding the materials into the blast furnace may lead to sudden change of the blast furnace pressure, causing the equipment to bear excessive pressure, thereby accelerating the equipment wear and tear, shortening its service life, and in severe cases, it may cause safety accidents.

[0003] The equalizing pressure treatment during the tank charging helps to keep the equipment running within the safe pressure range, thereby prolonging the service life of the equipment; the equalizing pressure process can also help to stably regulate the blast furnace pressure, reducing the risks that may be caused by sudden change of the blast furnace pressure, so the equalizing pressure treatment during the tank charging process is a key step, which can ensure the safety of the blast furnace ironmaking production process.

[0004] At present, when the tank is subjected to the equalizing pressure treatment, due to the existence of a certain amount of dust in the raw materials and the broken powder generated by the mutual collision of the raw materials, when the raw materials flow down, a certain amount of gas surges up, and the dust and broken powder with light weight are left in the tank; at this time, when the equalizing pressure diffusion valve is opened, due to the pressure difference, the gas flows rapidly and drives these dust and broken powder to rush into the pipeline, part of which rushes out of the pipeline, and part of which is blocked in the pipeline; due to the temperature difference and water vapor and the like, this part of the dust and broken powder quickly solidifies and adheres to the pipeline. With the passage of time, the solidified material accumulates more and more, eventually leading to small or even complete blockage of the pipeline.

[0005] Therefore, in order to solve the above problems, the utility model provides a kind of prevent stifled blast furnace equalizing pressure diffusion system to solve the problem that dust and broken powder in raw materials rush into pipeline and adhere to pipeline due to pressure difference during the equalizing pressure treatment of tank charging, leading to pipeline blockage, thereby causing the pressure in tank to be unable to release and interrupt charging. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of prevent stifled blast furnace equalizing pressure diffusion system to solve the problem that dust and broken powder in raw materials rush into pipeline and adhere to pipeline due to pressure difference during the equalizing pressure treatment of tank charging, leading to pipeline blockage.

[0007] In order to achieve the above object, the utility model provides a basic scheme for a blast furnace pressure equalizing and diffusing system capable of preventing blockage, comprising a blast furnace and a material tank, wherein a distributor is arranged on the material tank, the distributor is communicated with the top of the blast furnace, a pressure equalizing and diffusing main pipe is communicated with one side of the material tank, a pressure equalizing pipe and a diffusing pipe are communicated with the pressure equalizing and diffusing main pipe, a clean gas storage tank is communicated with the other end of the pressure equalizing pipe, a pressure equalizing branch pipe and a diffusing branch pipe are communicated with the pressure equalizing pipe, pressure equalizing valves and diffusing valves are respectively arranged on the pressure equalizing pipe and the diffusing pipe, branch pressure equalizing valves and branch diffusing valves are respectively arranged on the pressure equalizing branch pipe and the diffusing branch pipe, a nitrogen gas purging pipeline is communicated with the pressure equalizing pipe, and a nitrogen gas purging valve is arranged on the nitrogen gas purging pipeline.

[0008] The working principle of the utility model is as follows: when in use, first, open the pressure equalizing valve, so that the clean gas in the clean gas storage tank enters the material tank through the pressure equalizing pipe, thereby pressurizing the material tank, and then the material in the material tank is uniformly added to the blast furnace through the distributor, after the material is distributed, first, close the pressure equalizing valve, then open the diffusing valve, and the excess pressure in the material tank is discharged through the diffusing pipe; when it is necessary to clean the pipeline, first, close the pressure equalizing valve and the diffusing valve, then open the nitrogen gas purging valve, and the dust adhered in the pipeline is flushed into the material tank by the pressure of the nitrogen gas.

[0009] The utility model has the advantages that: the nitrogen gas purging device and the pressure equalizing and diffusing branch are additionally arranged, so that the diffusing pipeline can be cleaned, the dust adhered to the inner wall of the pipeline can be cleaned, the problem that the dust adhered to the pipeline causes the pipeline to be blocked is prevented, and the problem that the blast furnace is directly stopped and the blow-off accident occurs due to the failure of the single pressure equalizing and diffusing valve is avoided.

[0010] In scheme two, which is the preferred embodiment of the basic scheme, a pressure transmitter is arranged at the connection between the material tank and the pressure equalizing and diffusing main pipe, and the pressure transmitter is electrically connected with a PLC controller; the pressure transmitter has a real-time monitoring function, can transmit the pressure information of the material tank and the pipeline to the PLC controller in real time, and enables the staff to master the pressure condition in the production process at any time, so that the abnormal condition can be found in time and handled, the production accident caused by pressure fluctuation is avoided, and the production efficiency is improved.

[0011] In scheme three, which is the preferred embodiment of the basic scheme, an inspection hole is arranged at the connection between the diffusing pipe and the pressure equalizing and diffusing main pipe, and an inspection hole is arranged at the connection between the diffusing pipe and the pressure equalizing pipe; the inspection holes facilitate the staff to perform daily maintenance and repair on the pipeline, thereby reducing the downtime caused by system failure.

[0012] Scheme four, this is the preferred basic scheme, the equalizing valve, the diffusion valve, the branch equalizing valve and the branch diffusion valve are all electromagnetic valves, and the equalizing valve, the diffusion valve, the branch equalizing valve and the branch diffusion valve are all electrically connected with the PLC controller; the PLC controller can realize remote control, which is convenient for operation.

[0013] Scheme five, this is the preferred basic scheme, the diffusion pipe and the diffusion branch pipe are communicated with the exhaust main pipe, and the exhaust main pipe is provided with a silencer; the power noise generated by the gas during the equalizing diffusion of the blast furnace top can be significantly reduced, and the noise level meets the requirements of industrial standards.

[0014] Scheme six, this is the preferred basic scheme, the nitrogen purging valve is a pulse valve; the pulse valve can accurately control the gas flow and pressure, improve the safety and stability of the system, thereby reducing the risk of safety accidents.

[0015] Scheme seven, this is the preferred basic scheme, the equalizing diffusion main pipe, the equalizing pipe, the diffusion pipe, the equalizing branch pipe and the diffusion branch pipe are all provided with an electric heating tape, the equalizing diffusion main pipe is provided with a temperature sensor, and the temperature sensor and the switch of the electric heating tape are both electrically connected with the PLC controller; the temperature sensor can monitor the temperature of the pipeline in real time, and the electric heating tape can heat the pipeline, so that the water in the pipeline is prevented from accumulating in winter when the temperature is low, and the dust in the pipeline is prevented from adhering to the inner wall of the pipeline and causing the pipeline to be blocked. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of a blast furnace equalizing diffusion system capable of preventing blockage. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail by specific implementation ways as follows:

[0018] The reference signs in the drawings of the specification include: 1, blast furnace; 2, material tank; 3, distributor; 4, equalizing diffusion main pipe; 5, equalizing pipe; 6, diffusion pipe; 7, clean gas storage tank; 8, equalizing branch pipe; 9, diffusion branch pipe; 10, equalizing valve; 11, diffusion valve; 12, branch equalizing valve; 13, branch diffusion valve; 14, nitrogen purging pipeline; 15, nitrogen purging valve; 16, pressure transmitter; 17, manhole; 18, exhaust main pipe; 19, silencer; 20, temperature sensor.

[0019] As Figure 1The shown: a kind of anti-clogging blast furnace equalizing pressure diffusion system, including blast furnace 1 and tank 2, be equipped with distributor 3 on tank 2, distributor 3 and blast furnace 1 top communication, one side of tank 2 is communicated with equalizing pressure diffusion main pipe 4, temperature sensor 20 is equipped on equalizing pressure diffusion main pipe 4, pressure transmitter 16 is equipped at the connecting place of tank 2 and equalizing pressure diffusion main pipe 4, PLC controller is electrically connected on temperature sensor 20 and pressure transmitter 16, equalizing pressure diffusion main pipe 4 is communicated with equalizing pressure pipe 5 and diffusion pipe 6, communication place of equalizing pressure diffusion main pipe 4 and diffusion pipe 6 is equipped with access hole 17, communication place of equalizing pressure pipe 5 and diffusion pipe 6 is equipped with access hole 17, one end of equalizing pressure pipe 5 is communicated with clean gas storage tank 7, equalizing pressure pipe 5 is communicated with equalizing pressure branch pipe 8 and diffusion branch pipe 9, diffusion pipe 6 and diffusion branch pipe 9 are communicated with discharge main pipe 18, silencer 19 is equipped on discharge main pipe 18, electric heating tape is equipped on equalizing pressure diffusion main pipe 4, equalizing pressure pipe 5, diffusion pipe 6, equalizing pressure branch pipe 8 and diffusion branch pipe 9, the switch of electric heating tape and PLC controller are electrically connected, equalizing pressure pipe 5, diffusion pipe 6, equalizing pressure branch pipe 8 and diffusion branch pipe 9 are equipped with equalizing pressure valve 10, diffusion valve 11, branch equalizing pressure valve 12 and branch diffusion valve 13 respectively, equalizing pressure valve 10, diffusion valve 11, branch equalizing pressure valve 12 and branch diffusion valve 13 are all solenoid valves, equalizing pressure valve 10, diffusion valve 11, branch equalizing pressure valve 12 and branch diffusion valve 13 are all electrically connected with PLC controller, nitrogen gas purging line 14 is communicated with equalizing pressure pipe 5, nitrogen gas purging valve 15 is equipped on nitrogen gas purging line 14, nitrogen gas purging valve 15 is pulse valve, nitrogen gas purging valve 15 and PLC controller are electrically connected.

[0020] The implementation mode of the embodiment is: when equalizing pressure is carried out to tank 2, first open equalizing pressure valve 10, make clean gas in clean gas storage tank 7 pass through equalizing pressure pipe 5 through equalizing pressure diffusion main pipe 4, into tank 2, to pressurize tank 2, in turn, the material in tank 2 is added to blast furnace 1 evenly through distributor 3, after completing distribution, first close equalizing pressure valve 10, then open diffusion valve 11, make the excess clean gas in tank 2 pass through diffusion pipe 6 and discharge.

[0021] When the equalizing valve 10 and the bleeder valve 11 fail, first, the equalizing valve 10 and the bleeder valve 11 are closed, then the bypass equalizing valve 12 is opened, the clean gas in the clean gas storage tank 7 enters the material tank 2 through the equalizing bypass pipe 8, thereby pressurizing the material tank 2, and then the material in the material tank 2 is added to the blast furnace 1 through the distributor 3, after the material is distributed, first, the bypass equalizing valve 12 is closed, then the bypass bleeder valve 13 is opened, the excess pressure in the material tank 2 enters the discharge main pipe 18 through the bleeder bypass pipe 9 and is discharged; at the same time, the temperature sensor 20 detects the temperature of the pipeline in real time and transmits the temperature data to the PLC controller, when the temperature sensor 20 detects that the temperature of the pipeline is lower than 0℃, the worker opens the switch of the electric heat tracing band through the PLC controller, the electric heat tracing band can heat the equalizing bleeder main pipe 4, the equalizing pipe 5, the bleeder pipe 6, the equalizing bypass pipe 8 and the bleeder bypass pipe 9, when the temperature sensor 20 detects that the temperature of the pipeline is higher than 10℃, the worker closes the switch of the electric heat tracing band through the PLC controller.

[0022] When the pipeline needs to be cleaned, first, the equalizing valve 10, the bleeder valve 11, the bypass equalizing valve 12 and the bypass bleeder valve 13 are closed, then the nitrogen purging valve 15 is opened, the nitrogen enters the nitrogen purging pipeline 14, and the dust adhered in the pipeline is flushed into the material tank 2 through the pressure of the nitrogen.

[0023] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme and other common knowledge are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and other records in the specification can be used to explain the content of the claims.

Claims

1. A non-clogging pressure equalizing vent system for a blast furnace, characterized by, The utility model provides a kind of blast furnace and material tank, the material tank (2) is equipped with distributing device (3) on it, the distributing device (3) and blast furnace (1) top are communicated, one side of the material tank (2) is communicated with equalizing pressure diffusion main pipe (4), the equalizing pressure diffusion main pipe (4) is communicated with equalizing pressure pipe (5) and diffusion pipe (6) on, the other end of the equalizing pressure pipe (5) is communicated with clean gas storage tank (7), the equalizing pressure pipe (5) is communicated with equalizing pressure branch pipe (8) and diffusion branch pipe (9) on, equalizing pressure valve (10) and diffusion valve (11) are respectively equipped on the equalizing pressure pipe (5) and diffusion pipe (6), equalizing pressure branch valve (12) and diffusion branch valve (13) are respectively equipped on the equalizing pressure branch pipe (8) and diffusion branch pipe (9), nitrogen gas purging pipeline (14) is communicated with the equalizing pressure pipe (5) on, nitrogen gas purging valve (15) is equipped on the nitrogen gas purging pipeline (14).

2. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein Pressure transmitter (16) is equipped at the junction of the material tank (2) and equalizing pressure diffusion main pipe (4), and PLC controller is electrically connected to the pressure transmitter (16).

3. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein, Access hole (17) is equipped at the communication of the diffusion pipe (6) and equalizing pressure diffusion main pipe (4), and access hole (17) is equipped at the communication of the diffusion pipe (6) and equalizing pressure pipe (5).

4. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein, Equalizing pressure valve (10), diffusion valve (11), equalizing pressure branch valve (12) and diffusion branch valve (13) are all solenoid valves, and equalizing pressure valve (10), diffusion valve (11), equalizing pressure branch valve (12) and diffusion branch valve (13) are all electrically connected to PLC controller.

5. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein, Diffusion pipe (6) and diffusion branch pipe (9) are communicated with discharge main pipe (18), and silencer (19) is equipped on the discharge main pipe (18).

6. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein, Nitrogen gas purging valve (15) is pulse valve, and nitrogen gas purging valve (15) is electrically connected to PLC controller.

7. A non-clogging pressure equalizing vent system for a blast furnace as defined in claim 1, wherein Equalizing pressure diffusion main pipe (4), equalizing pressure pipe (5), diffusion pipe (6), equalizing pressure branch pipe (8) and diffusion branch pipe (9) are all equipped with electric heat tracing, temperature sensor (20) is equipped on the equalizing pressure diffusion main pipe (4), and the switch of temperature sensor (20) and electric heat tracing is electrically connected to PLC controller.

Images