CN216337750U - Uniform pressure coal gas full recovery device for charging bucket at top of iron-smelting blast furnace - Google Patents
Uniform pressure coal gas full recovery device for charging bucket at top of iron-smelting blast furnace Download PDFInfo
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- CN216337750U CN216337750U CN202122886925.9U CN202122886925U CN216337750U CN 216337750 U CN216337750 U CN 216337750U CN 202122886925 U CN202122886925 U CN 202122886925U CN 216337750 U CN216337750 U CN 216337750U
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Abstract
The utility model relates to a technology for conveying a pressure-equalizing coal gas recovery gas of a charging bucket at the top of an iron-making blast furnace, in particular to a pressure-equalizing coal gas full-recovery device of the charging bucket at the top of the iron-making blast furnace, which has high efficiency, energy conservation, environmental protection and good economic benefit. The device comprises a furnace top charging bucket and a dust removal device, and also comprises an upper ejector tank body, a lower ejector tank body, an ejected gas inlet and outlet pipeline, an ejector tank body connecting pipeline, a high-pressure gas inlet pipeline and a high-pressure gas outlet pipeline which are arranged between the furnace top charging bucket and the dust removal device; the injected gas inlet and outlet pipeline is respectively connected with the furnace top charging bucket, the dust removal device, the upper injector tank body and the high-pressure gas outlet pipeline; the upper ejector tank body is connected with the lower ejector tank body; the high-pressure gas leading-in pipeline and the high-pressure gas leading-out pipeline are connected with the lower ejector tank body. The utility model uses high-pressure gas as power to lead the upper ejector tank body and the lower ejector tank body to generate high liquid level difference, and sucks the gas of the furnace top charging bucket through liquid level potential energy.
Description
Technical Field
The utility model relates to a technology for conveying a pressure-equalizing coal gas recovery gas of a charging bucket at the top of an iron-making blast furnace, in particular to a pressure-equalizing coal gas full-recovery device of the charging bucket at the top of the iron-making blast furnace, which has high efficiency, energy conservation, environmental protection and good economic benefit.
Background
A device for conveying power of gas is needed in a blast furnace top charging bucket pressure-equalizing gas recovery system, a gas-gas ejector is often used in the prior art, and the gas-gas ejector adopts high-pressure clean gas as power gas to suck the charging bucket gas to be emptied. The gas-gas ejector sucks the pressure of the charging bucket at the top of the blast furnace to reach the atmospheric pressure, so that the time is long, and the charging time of each batch of the blast furnace is influenced. Therefore, a set of process for rapidly completing the recovery of the coal pressure equalizing gas of the furnace top charging bucket is very important for a furnace top charging system of the iron-making blast furnace. Because the energy used by the gas ejector for recovering the furnace top charging bucket gas is high-pressure gas (furnace top high-pressure gas or high-pressure clean gas after dust removal), the high-pressure gas (0.15-0.25 MPa) passes through high-speed airflow generated by a Laval nozzle to form certain vacuum at the nozzle outlet. The gas ejector for the gas recovery of the furnace top charging bucket has strong suction capacity and wider pressure range of the sucked gas. However, the gas ejector needs a certain starting time, and the process is difficult to meet the requirement of the furnace top feeding process for emptying the gas of the furnace top charging bucket in only 10-20 seconds. At present, much pressure-equalizing gas of a blast furnace charging bucket in China is not recycled, and less pressure-equalizing gas is fully recycled by using a gas-gas ejector golden star road. The pressure equalizing of the furnace top charging bucket basically adopts the traditional pressure equalizing and bleeding technology, semi-clean gas or clean gas is used for primary pressure equalizing, nitrogen is used for secondary pressure equalizing, and partial recovery of the pressure equalizing gas is only a small part. Blast furnace raw gas (gas without dust removal) has high dust content, the main components of the blast furnace raw gas are carbon monoxide accounting for about 20-25%, carbon dioxide accounting for about 20-25%, a small amount of hydrogen accounting for about 1%, and the balance of nitrogen accounting for about 40-50%, and the gas is wasted after pressure equalization. Along with the improvement of environmental protection requirements, pressure-equalizing coal gas of a blast furnace charging bucket is strictly forbidden to be discharged, so the recovery of the pressure-equalizing coal gas of the blast furnace is also promoted in the schedule of the steel industry, the existing pressure-equalizing bleeding coal gas recovery process of the iron-making blast furnace generally adopts a method of injecting top charging bucket coal gas by high-pressure coal gas, the method is simple, but has the problem that the recovery time cannot meet the process requirements, so that the pressure-equalizing coal gas of the top charging bucket cannot be completely recovered, the top charging bucket coal gas cannot be quickly discharged, the charging time of a charging system of the blast furnace is prolonged, the process requirements cannot be completely met, and the enterprise target of taking both economic benefits and environmental protection benefits into consideration cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems, and provides the device for fully recovering the pressure-equalizing coal gas of the charging bucket at the top of the iron-making blast furnace, which is energy-saving, environment-friendly and good in economic benefit.
The utility model solves the problems and adopts the technical scheme that:
a pressure-equalizing gas full-recovery device of a charging bucket at the top of an iron-making blast furnace comprises the charging bucket at the top of the furnace, a dust removal device, an upper ejector tank body, a lower ejector tank body, an ejected gas inlet and outlet pipeline, an ejector tank body connecting pipeline, a high-pressure gas inlet pipeline and a high-pressure gas outlet pipeline, wherein the upper ejector tank body, the lower ejector tank body, the ejected gas inlet and outlet pipeline, the ejector tank body connecting pipeline, the high-pressure gas inlet pipeline and the high-pressure gas outlet pipeline are arranged between the charging bucket at the top of the furnace and the dust removal device; the injected gas inlet and outlet pipeline is provided with four external connecting interfaces and is respectively connected with the furnace top charging bucket, the dust removal device, the upper injector tank body and the high-pressure gas outlet pipeline; the upper ejector tank body is connected with the lower ejector tank body through an ejector tank body connecting pipeline; the high-pressure gas leading-in pipeline and the high-pressure gas leading-out pipeline are respectively connected with the lower ejector tank body, the gas in the lower ejector tank body is discharged into the ejected gas inlet and outlet pipeline through the high-pressure gas leading-out pipeline, and then enters the dust removal device through the ejected gas inlet and outlet pipeline.
Compared with the prior art, the utility model adopting the technical scheme has the outstanding characteristics that:
the method comprises the following steps of taking high-pressure gas as power to enable an upper ejector tank body and a lower ejector tank body to generate high liquid level difference, pressing liquid in the lower ejector tank body into the upper ejector tank body by utilizing the pressure of the high-pressure gas, enabling the liquid in the upper ejector tank body to rapidly flow into the lower ejector tank body through liquid level potential energy, causing the upper ejector tank body to rapidly generate vacuum, achieving the function of pumping the gas in a furnace top charging bucket, enabling the pressure in the furnace top charging bucket to meet technological requirements, avoiding influencing the charging time of a blast furnace charging system and improving the efficiency.
Secondly, the liquid level of the upper ejector tank body is improved through the kinetic energy of high-pressure coal gas, and the pumped coal gas enters a dust removal device and finally enters a coal gas outer net for recovery, so that the energy is saved, and the environment is protected.
Preferably, the further technical scheme of the utility model is as follows:
the high-pressure gas inlet pipeline is provided with a high-pressure gas inlet pipeline quick switch valve.
The high-pressure gas leading-out pipeline is respectively provided with a high-pressure gas leading-out pipeline rapid switch valve and a high-pressure gas leading-out pipeline manual valve.
The gas inlet and outlet pipeline comprises a three-way front pipeline, a three-way rear pipeline and a three-way lower pipeline which are connected through a three-way, the front end of the three-way front pipeline is connected with the furnace top charging bucket, the rear end of the three-way rear pipeline is connected with the dust removal device, the lower end of the three-way lower pipeline is connected with the upper ejector tank body, and the high-pressure gas leading-out pipeline is connected with the three-way rear pipeline.
The front pipeline of the tee is provided with a front quick switch valve of the tee, the rear pipeline of the tee is provided with a rear quick switch valve of the tee, and the lower pipeline of the tee is provided with a manual valve of an inlet of an upper ejector tank body.
And an ejector tank body connecting pipeline quick switching valve is arranged on the ejector tank body connecting pipeline.
Pressure detectors are arranged on the upper ejector tank body and the lower ejector tank body; and the numerical signals detected by the pressure detector participate in controlling the on-off of each valve in the furnace top charging bucket pressure-equalizing gas full-recovery device.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: a furnace top charging bucket 1; a three-way front pipeline 2; a three-way front quick switch valve 3; a tee joint 4; a three-way rear quick switch valve 5; a three-way rear pipeline 6; a dust removing device 7; an upper ejector tank inlet manual valve 8; a tee lower pipeline 9; a pressure detector 10; an upper ejector tank 11; the ejector tank body is connected with a pipeline 12; the ejector tank body is connected with a pipeline quick switch valve 13; a high-pressure gas introduction line 14; a high-pressure gas inlet pipeline quick switch valve 15; a high-pressure gas outlet pipeline manual valve 16; a high-pressure gas outlet line 17; a high-pressure gas leading-out pipeline quick switch valve 18; a lower ejector tank 19.
The specific implementation mode is as follows:
the utility model will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the utility model.
Referring to fig. 1, the pressure-equalizing gas full recovery device of the top charging bucket of the iron-making blast furnace comprises a top charging bucket 1 and a dust collector 7, wherein the dust collector 7 is a bag-type dust collector and can also use other purification equipment, and further comprises an upper ejector tank body 11, a lower ejector tank body 19, an injected gas inlet and outlet pipeline, an ejector tank body connecting pipeline 12, a high-pressure gas inlet pipeline 14 and a high-pressure gas outlet pipeline 17 which are arranged between the top charging bucket 1 and the dust collector 7; the injected gas inlet and outlet pipeline is provided with four external connecting interfaces and is respectively connected with the furnace top charging bucket 1, the dust removal device 7, the upper injector tank body 11 and the high-pressure gas outlet pipeline 17; the upper ejector tank 11 is connected with the lower ejector tank 19 through the ejector tank connecting pipeline 12, the lower part of the ejector tank connecting pipeline 12 is positioned in the lower ejector tank 19 and is 0.3-1.0 m away from the bottom of the lower ejector tank 19, the liquid level of liquid in the lower ejector tank 19 is ensured to be always higher than the lower pipe orifice of the ejector tank connecting pipeline 12, and high-pressure clean coal gas is prevented from entering the upper ejector tank 11; the high-pressure gas leading-in pipeline 14 and the high-pressure gas leading-out pipeline 17 are respectively connected with a lower ejector tank body 19, gas in the lower ejector tank body 19 is discharged into an ejected gas inlet-outlet pipeline through the high-pressure gas leading-out pipeline 17 and then enters the dust removal device 7 through the ejected gas inlet-outlet pipeline, the high-pressure gas leading-in pipeline 14 is connected with a high-pressure clean gas pipeline, an elbow is additionally arranged on the pipeline according to the actual situation of the site, the volume of the lower ejector tank body 19 is 1.0-4.0 times of that of the upper ejector tank body 11, the volume of the upper ejector tank body 11 is 0.15-3.0 times of that of the furnace top charging bucket 1, and the height difference between the upper ejector tank body 11 and the lower ejector tank body 19 is 3-30 m.
The gas inlet and outlet pipeline comprises a three-way front pipeline 2, a three-way rear pipeline 6 and a three-way lower pipeline 9 which are connected through a three-way 4, the front end of the three-way front pipeline 2 is connected with the furnace top charging bucket 1, the rear end of the three-way rear pipeline 6 is connected with a dust removal device 7, the lower end of the three-way lower pipeline 9 is connected with an upper ejector tank body 11, and a high-pressure gas leading-out pipeline 17 is connected with the three-way rear pipeline 6.
A high-pressure gas inlet pipeline rapid switch valve 15 is arranged on the high-pressure gas inlet pipeline 14 through a flange; a high-pressure gas leading-out pipeline rapid switch valve 18 and a high-pressure gas leading-out pipeline manual valve 16 are respectively arranged on the high-pressure gas leading-out pipeline 17 through flanges; a three-way front quick switch valve 3 is installed on the three-way front pipeline 2 through a flange, a three-way rear quick switch valve 5 is installed on the three-way rear pipeline 6 through a flange, a necessary process valve (according to the actual process purpose) is installed on the three-way rear pipeline 6 close to a dust removal device 7, and an upper ejector tank inlet manual valve 8 is installed on the three-way lower pipeline 9 through a flange; and the ejector tank body connecting pipeline 12 is provided with an ejector tank body connecting pipeline quick switching valve 13 through a flange.
The upper ejector tank body 11 and the lower ejector tank body 19 are both provided with a pressure detector 10, and the pressure detectors 10 detect numerical signals to participate in controlling the on-off of each valve in the pressure-equalizing gas full-recovery device of the furnace top charging bucket 1.
When the high-pressure gas injection device is used, the rear quick switch valve 5 of the tee joint is opened, the front quick switch valve 3 of the tee joint is closed, the quick switch valve 18 of the high-pressure gas leading-out pipeline is closed, the quick switch valve 15 of the high-pressure gas leading-in pipeline is opened, the quick switch valve 13 of the ejector tank connecting pipeline is opened, high-pressure gas is led into the lower ejector tank 19 through the high-pressure gas leading-in pipeline 14, the pressure of the high-pressure gas of the iron-making blast furnace (the blast furnace gas pressure gauge pressure is 0.15MPa to 0.25 MPa) is used as a power source, liquid in the lower ejector tank 19 is lifted to the upper ejector tank 11, liquid level potential energy is generated between the upper ejector tank 11 and the lower ejector tank 19, when the upper ejector tank 11 is filled with liquid, the quick switch valve 13 of the ejector tank connecting pipeline is closed, and the liquid level height difference between the upper ejector tank 11 and the lower ejector tank 19 is kept; then closing the high-pressure gas inlet pipeline quick switch valve 15, opening the high-pressure gas outlet pipeline quick switch valve 18, keeping the high-pressure gas outlet pipeline manual valve 16 in a normally open state, emptying the power gas in the lower ejector tank 19, and closing the high-pressure gas outlet pipeline quick switch valve 18 after emptying the gas; then opening the three-way front quick switch valve 3, opening the three-way rear quick switch valve 5, keeping other manual valves in a normally open state, discharging the gas to be discharged in the furnace top charging bucket 1 to the dust removal device 7, and closing the three-way rear quick switch valve 5 when the gas is discharged to a certain degree (the pressure difference between the furnace top charging bucket 1 and the dust removal device 7 is small); when gas in the furnace top charging bucket 1 needs to be pumped, the quick switch valve 13 of the connecting pipeline of the ejector tank body is opened, liquid in the upper ejector tank body rapidly flows into the lower ejector tank body by utilizing the liquid level potential energy of the upper ejector tank body and the lower ejector tank body, so that vacuum is rapidly generated in the upper ejector tank body, the gas in the furnace top charging bucket 1 is pumped into the upper ejector tank body 11, pressure-equalizing gas in the furnace top charging bucket 1 is rapidly exhausted, the gas pressure in the furnace top charging bucket 1 meets the process requirement, the quick switch valve 13 of the connecting pipeline of the ejector tank body is rapidly closed when the process requirement is met, and the pressure-equalizing gas in the furnace top charging bucket 1 enters the upper ejector tank body 11; the front quick switch valve 3 of the tee joint is closed, the quick switch valve 15 of the high-pressure coal gas introducing pipeline is opened, the quick switch valve 13 of the connecting pipeline of the ejector tank body is opened, the rear quick switch valve 5 of the tee joint is opened, high-pressure coal gas is introduced into the lower ejector tank body 19 through the high-pressure coal gas introducing pipeline 14 again, so that the liquid level of the upper ejector tank body is improved, coal gas in the upper ejector tank body 11 is sent into the dust removal device 7, and the coal gas enters the coal gas outer net after being purified to achieve coal gas recovery.
According to the utility model, high liquid level difference is generated between the upper ejector tank body 11 and the lower ejector tank body 19 by taking high-pressure coal gas as power, liquid in the lower ejector tank body 19 is pressed into the upper ejector tank body 11 by using the pressure of the high-pressure coal gas, and then the liquid in the upper ejector tank body 11 rapidly flows into the lower ejector tank body 19 through liquid level potential energy, so that vacuum is rapidly generated in the upper ejector tank body 11, the function of sucking the coal gas in the furnace top charging bucket 1 is realized, the pressure in the furnace top charging bucket 1 meets the process requirement, the influence on the charging time of a blast furnace charging system can be avoided, the efficiency is improved, the pumped coal gas enters the dust removal device 7 while the liquid level of the upper ejector tank body 11 is improved by the kinetic energy of the high-pressure coal gas, and finally enters the coal gas outer net for recovery, so that the energy is saved and the environment is protected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (7)
1. The utility model provides a device is withdrawed entirely to iron-making blast furnace top charging bucket voltage-sharing coal gas, includes top charging bucket and dust collector, its characterized in that: the device also comprises an upper ejector tank body, a lower ejector tank body, an ejected coal gas inlet and outlet pipeline, an ejector tank body connecting pipeline, a high-pressure coal gas inlet pipeline and a high-pressure coal gas outlet pipeline which are arranged between the furnace top charging bucket and the dust removal device; the injected gas inlet and outlet pipeline is provided with four external connecting interfaces and is respectively connected with the furnace top charging bucket, the dust removal device, the upper injector tank body and the high-pressure gas outlet pipeline; the upper ejector tank body is connected with the lower ejector tank body through an ejector tank body connecting pipeline; the high-pressure gas leading-in pipeline and the high-pressure gas leading-out pipeline are respectively connected with the lower ejector tank body, the gas in the lower ejector tank body is discharged into the ejected gas inlet and outlet pipeline through the high-pressure gas leading-out pipeline, and then enters the dust removal device through the ejected gas inlet and outlet pipeline.
2. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device as claimed in claim 1, wherein: the high-pressure gas inlet pipeline is provided with a high-pressure gas inlet pipeline quick switch valve.
3. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device as claimed in claim 1, wherein: the high-pressure gas leading-out pipeline is respectively provided with a high-pressure gas leading-out pipeline rapid switch valve and a high-pressure gas leading-out pipeline manual valve.
4. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device as claimed in claim 1, wherein: the gas inlet and outlet pipeline comprises a three-way front pipeline, a three-way rear pipeline and a three-way lower pipeline which are connected through a three-way, the front end of the three-way front pipeline is connected with the furnace top charging bucket, the rear end of the three-way rear pipeline is connected with the dust removal device, the lower end of the three-way lower pipeline is connected with the upper ejector tank body, and the high-pressure gas leading-out pipeline is connected with the three-way rear pipeline.
5. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device according to claim 4, characterized in that: the front pipeline of the tee is provided with a front quick switch valve of the tee, the rear pipeline of the tee is provided with a rear quick switch valve of the tee, and the lower pipeline of the tee is provided with a manual valve of an inlet of an upper ejector tank body.
6. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device as claimed in claim 1, wherein: and an ejector tank body connecting pipeline quick switching valve is arranged on the ejector tank body connecting pipeline.
7. The iron-making blast furnace top bucket pressure-equalizing gas full-recovery device as claimed in claim 1, wherein: and the upper ejector tank body and the lower ejector tank body are respectively provided with a pressure detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122886925.9U CN216337750U (en) | 2021-11-24 | 2021-11-24 | Uniform pressure coal gas full recovery device for charging bucket at top of iron-smelting blast furnace |
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| CN202122886925.9U CN216337750U (en) | 2021-11-24 | 2021-11-24 | Uniform pressure coal gas full recovery device for charging bucket at top of iron-smelting blast furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015827A (en) * | 2021-11-24 | 2022-02-08 | 河北恒德环保科技有限公司 | Iron-making blast furnace top charging bucket pressure-equalizing gas full-recovery device and iron-making blast furnace top charging bucket pressure-equalizing gas full-recovery process |
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2021
- 2021-11-24 CN CN202122886925.9U patent/CN216337750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015827A (en) * | 2021-11-24 | 2022-02-08 | 河北恒德环保科技有限公司 | Iron-making blast furnace top charging bucket pressure-equalizing gas full-recovery device and iron-making blast furnace top charging bucket pressure-equalizing gas full-recovery process |
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