CN210596125U - Blast furnace top gas recovery device utilizing recovered gas to seal distributor gear box - Google Patents
Blast furnace top gas recovery device utilizing recovered gas to seal distributor gear box Download PDFInfo
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- CN210596125U CN210596125U CN201921797302.0U CN201921797302U CN210596125U CN 210596125 U CN210596125 U CN 210596125U CN 201921797302 U CN201921797302 U CN 201921797302U CN 210596125 U CN210596125 U CN 210596125U
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Abstract
A blast furnace top gas recovery device utilizing a recovered gas to seal a distributor gear box. The method is characterized in that: the coal gas high-pressure gas storage tank is communicated with the cyclone dust collector through a first pipeline, and is sequentially provided with a booster pump and a bag-type dust collector; and a second pipeline is arranged between the coal gas high-pressure gas storage tank and the gear box of the distributing device, and a first regulating valve is installed. The coal gas recovery device has the advantages that 1, the coal gas is actively conveyed into the coal gas high-pressure gas storage tank by the aid of the pressurizing pump, active coal gas recovery is achieved, and compared with the existing method that natural pressure is adopted for storage, the coal gas recovery device is high in recovery efficiency and good in energy-saving effect; 2. the recycled coal gas is used for replacing nitrogen to realize the sealing of the gear box of the distributing device, so that the nitrogen consumption can be saved, the cost is reduced, low-temperature nitrogen is prevented from entering the coal gas, and the air temperature of the hot blast stove and the power generation efficiency of a turbine are correspondingly improved.
Description
Technical Field
The utility model relates to the technical field of metallurgical ironmaking furnace top charging equipment, in particular to a blast furnace top gas recovery device utilizing a recovered gas seal distributor gear box.
Background
At present, in the field of metallurgical iron making, the technology of recovering the blast furnace top pressure-equalizing blow-off gas is gradually popularized and used, and considerable economic benefits are created for users. However, the existing gas recovery technology adopts the method of adding one or more containers communicated with a weighing material tank, such as a buffer tank and a bag-type dust collector, the gas of the weighing material tank is stored in the buffer tank and the bag-type dust collector in a balanced manner by means of natural pressure, after a valve is closed, the weighing material tank still has residual gas which is discharged into the atmosphere, the larger the volumes of the buffer tank and the bag-type dust collector are, the higher the gas recovery rate is, the larger the corresponding equipment investment is, the recovery rate of the existing gas blast furnace top pressure-equalizing and bleeding gas recovery technology is only about 70%, the recovery rate is not high, and about 30% of the gas is discharged into the atmosphere.
In addition, in the production process of blast furnace smelting feeding, a distributor and a lower sealing valve of furnace top equipment need nitrogen to seal and isolate the hot gas flow of the blast furnace from approaching the distributor and the lower sealing valve, so that high-temperature gas and dust in the blast furnace are prevented from entering an airtight box, and the service life of the equipment is prevented from being influenced. The adoption of nitrogen sealing needs to consume a large amount of nitrogen, and the nitrogen consumption of one blast furnace is more than million yuan per year; after the sealing nitrogen is mixed into the blast furnace gas, the heat value of the blast furnace gas is reduced, and the temperature of the gas indirectly affects the production to a certain extent.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of background art, the utility model provides an utilize blast furnace roof gas recovery unit who retrieves sealed distributing device gear box of coal gas realizes initiatively retrieving coal gas to utilize retrieving coal gas and replacing nitrogen gas to realize the sealed of distributing device gear box, reduce cost reduces the influence to production.
The utility model discloses the technical scheme who adopts: a blast furnace top gas recovery device utilizing recovered gas to seal a distributor gear box comprises a weighing material tank arranged on the top of a blast furnace, a gas pressure equalizing pipeline communicated with the weighing material tank, and a cyclone dust collector communicated with the weighing material tank, wherein the distributor gear box is arranged between the bottom of the weighing material tank and the top of the blast furnace, a pressure equalizing valve is arranged on the gas pressure equalizing pipeline, and a stop valve is arranged between the cyclone dust collector and the weighing material tank; the device also comprises a coal gas high-pressure gas storage tank; the coal gas high-pressure gas storage tank is communicated with the cyclone dust collector through a first pipeline, and is sequentially provided with a booster pump and a bag-type dust collector; and a second pipeline is arranged between the coal gas high-pressure gas storage tank and the gear box of the distributing device, and a first regulating valve is installed.
The gas high-pressure gas storage tank is characterized by further comprising a nitrogen tank, a third pipeline is arranged between the gas high-pressure gas storage tank and the nitrogen tank, and a nitrogen security pressure supplementing system is mounted on the third pipeline.
The nitrogen tank is communicated with the weighing material tank, and a nitrogen stop valve is arranged between the nitrogen tank and the weighing material tank.
And a check valve is arranged on a first pipeline between the coal gas high-pressure gas storage tank and the pressurizing pump.
The weighing material tank is arranged at the top of the blast furnace, the upper end of the weighing material tank is provided with a receiving hopper, an upper sealing valve is arranged between the weighing material tank and the receiving hopper, and a lower sealing valve is arranged between the lower end of the weighing material tank and the gear box of the distributing device; and a fourth pipeline is arranged between the coal gas high-pressure gas storage tank and the lower sealing valve, and a second regulating valve is arranged on the fourth pipeline.
The material weighing bucket is characterized by further comprising a silencer, and pressure-equalizing blow-off valves are arranged between the silencer and the weighing bucket as well as between the silencer and the cyclone dust collector.
The coal gas high-pressure gas storage tank is connected with a drainage device.
The utility model has the advantages that: by adopting the scheme, 1, the coal gas is actively conveyed into the coal gas high-pressure gas storage tank by adopting the pressurizing pump, so that the coal gas is actively recycled, and compared with the existing method of storing by adopting natural pressure, the method has the advantages of higher recycling efficiency and better energy-saving effect; 2. the recycled coal gas is used for replacing nitrogen to realize the sealing of the gear box of the distributing device, so that the nitrogen consumption can be saved, the cost is reduced, low-temperature nitrogen is prevented from entering the coal gas, and the air temperature of the hot blast stove and the power generation efficiency of a turbine are correspondingly improved.
Drawings
Fig. 1 is a schematic connection diagram of an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
as shown in the figure, the blast furnace top gas recovery device utilizing the recovered gas to seal the distributor gear box comprises a weighing charging bucket 1, a cyclone dust collector 3 and a gas high-pressure gas storage tank 7.
Weigh material jar 1 and install at blast furnace roof position, its upper end is equipped with hopper 18, and weigh and be equipped with between material jar 1 and the hopper 18 and close valve 19, weigh and be equipped with distributing device gear box 4 between material jar 1 lower extreme and the blast furnace, it is equipped with down between material jar 1 lower extreme and the distributing device gear box 4 to weigh and close valve 20.
Weigh bucket 1 and still be connected with coal gas pressure-equalizing pipeline 2, be equipped with equalizing valve 5, pressure-equalizing blind plate valve 26 on the coal gas pressure-equalizing pipeline 2, weigh bucket 1 and communicate clean gas network pipe through coal gas pressure-equalizing pipeline 2, and equalizing valve 5 provides the coal gas pressure-equalizing for weighing bucket 1.
The cyclone dust collector 3 is connected with the weighing material tank 1 through a pipeline, and a cut-off valve 6 is arranged between the cyclone dust collector 3 and the weighing material tank 1.
The coal gas high-pressure gas storage tank 7 is communicated with the cyclone dust collector 3 through a first pipeline 8, a check valve 17, a pressure pump 9 and a bag-type dust collector 10 are sequentially installed on the first pipeline 8, a second pipeline 11 is arranged between the coal gas high-pressure gas storage tank 7 and the gear box 4 of the distributing device, and a first regulating valve 12 is installed on the second pipeline.
The coal gas high-pressure gas storage tank 7 is a pressure container, the tank body is cylindrical, a safety valve is arranged on the tank body, the coal gas high-pressure gas storage tank 7 is guaranteed to be opened under the condition that the pressure exceeds the set pressure, the coal gas high-pressure gas storage tank 7 is guaranteed to be safe and reliable, and the bottom of the coal gas high-pressure gas storage tank 7 is connected with a drainage device 25 for draining coal gas condensate water.
The bag-type dust collector 10 is a general product, the shell is made of a steel plate and is of a circular or square structure, a high-temperature-resistant filter bag is arranged in the bag, and a coal gas high-pressure gas storage tank is adopted for back flushing of the bag.
The booster pump 9 is a frequency conversion booster pump which is a general product, can adjust the rotating speed, is used for generating pressure and actively conveys the coal gas to the coal gas high-pressure gas storage tank.
The check valve 17 is a general product and is used for preventing the coal gas in the coal gas high-pressure gas storage tank from flowing back to the pressurizing pump 9.
The blast furnace top gas recovery device can realize ordered actions by setting programs through an automatic control system, meets the requirements of production technology, and has the following specific working process:
before the cutoff valve 6 is opened, the pressure pump 9 extracts gas from the cyclone dust collector 3 and the bag-type dust collector 10 and conveys the gas into the gas high-pressure gas storage tank 7, the cyclone dust collector 3 and the bag-type dust collector 10 can reach a negative pressure value set by a system within a certain time, then the rotating speed of the pressure pump 9 is stopped or reduced, the lower sealing valve 20 is closed, the cutoff valve 6 is opened, the gas in the weighing material tank 1 can enter the cyclone dust collector 3 and the bag-type dust collector 10 in a negative pressure state, the rotating speed of the pressure pump 9 is started or increased simultaneously to convey the gas into the gas high-pressure gas storage tank 7, the cutoff valve 6 is closed after the cutoff valve 6 is opened for 8-10S, the upper sealing valve 19 and the receiving hopper 18 begin to feed into the weighing material tank 1, at the moment, the pressure pump 9 continues to extract gas from the cyclone dust collector 3 and the bag-type dust collector, the operation is repeated in a circulating way.
Meanwhile, the gas high-pressure gas storage tank 7 is communicated with the distributor gear box 4 through a second pipeline 11, recovered gas in the gas high-pressure gas storage tank 7 enters the distributor gear box 4 through the second pipeline 11, the distributor gear box 4 is sealed, the condition that hot gas flow of the blast furnace is close to the distributor gear box 4 is prevented, the gas flow on the second pipeline 11 can be adjusted through the first adjusting valve 12, and pressure balance is guaranteed.
A fourth pipeline 21 is further arranged between the gas high-pressure gas storage tank 7 and the lower sealing valve 20, a second regulating valve 22 is arranged on the fourth pipeline 21 and used for regulating the pressure in the gas high-pressure gas storage tank 7, when the pressure in the gas high-pressure gas storage tank 7 reaches a set value (the set value is usually smaller than the set value of a safety valve of the gas high-pressure gas storage tank), the booster pump still continues to convey gas into the gas high-pressure gas storage tank 7, at the moment, the second regulating valve 22 is opened, the gas is conveyed to the lower sealing valve 20, the pressure in the gas high-pressure gas storage tank 7 is regulated, namely, the pressure in the gas high-pressure gas storage tank 7 is ensured not to be too high, and the gas is prevented from; when the pressure in the gas high-pressure gas storage tank 7 is lower than the set pressure, the second regulating valve 22 is closed.
In addition, still include nitrogen gas jar 13, be equipped with third pipeline 14 between coal gas high pressure gas holder 7 and the nitrogen gas jar 13, install nitrogen gas security pressure compensating system 15 on the third pipeline 14, just nitrogen gas jar 13 is linked together with weighing material jar 1, and is equipped with nitrogen gas trip valve 16 between nitrogen gas jar 13 and the weighing material jar 1.
The nitrogen security pressure compensating system 15 generally comprises a nitrogen bleeding valve, a nitrogen inlet valve, a nitrogen vent valve and the like, nitrogen is used as a standby medium, when the gas pressure of the gas high-pressure gas storage tank 7 is insufficient and reaches a certain set value, the nitrogen inlet valve is opened to supplement the pressure of the gas high-pressure gas storage tank 7, and when the gas high-pressure gas storage tank 7 stops working, the nitrogen security pressure compensating system 15 can be manually opened and closed to purge gas so as to ensure the safety of personnel and equipment.
Moreover, the nitrogen shut-off valve 16 is opened to provide secondary pressure equalization for the weighing material tank 1,
the material weighing bucket is characterized by further comprising a silencer 23, pressure-equalizing bleeding valves 24 are arranged between the silencer 23 and the weighing bucket 1 and between the silencer 23 and the cyclone dust collector 3, and pressure-equalizing bleeding blind plate valves 27 are further arranged between the silencer and the cyclone dust collector 3.
The blast furnace top gas recovery device utilizing the recovered gas to seal the distributor gear box has the advantages that: 1. the coal gas is actively conveyed into the coal gas high-pressure gas storage tank by adopting the pressure pump, so that the active recovery of the coal gas is realized, and compared with the prior art that natural pressure is adopted for storage, the recovery efficiency is higher, and the energy-saving effect is better; 2. the recycled coal gas is used for replacing nitrogen to realize the sealing of the gear box of the distributing device, so that the nitrogen consumption can be saved, the cost is reduced, low-temperature nitrogen is prevented from entering the coal gas, and the air temperature of the hot blast stove and the power generation efficiency of a turbine are correspondingly improved.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.
Claims (7)
1. A blast furnace top gas recovery device for sealing a distributor gear box by using recovered gas comprises a weighing material tank (1) arranged on the top of a blast furnace, a gas pressure equalizing pipeline (2) communicated with the weighing material tank (1), and a cyclone dust collector (3) communicated with the weighing material tank (1), wherein a distributor gear box (4) is arranged between the bottom of the weighing material tank (1) and the top of the blast furnace, a pressure equalizing valve (5) is arranged on the gas pressure equalizing pipeline (2), and a stop valve (6) is arranged between the cyclone dust collector (3) and the weighing material tank (1); the method is characterized in that: also comprises a coal gas high-pressure gas storage tank (7); the coal gas high-pressure gas storage tank (7) is communicated with the cyclone dust collector (3) through a first pipeline (8), and is sequentially provided with a booster pump (9) and a bag-type dust collector (10); a second pipeline (11) is arranged between the coal gas high-pressure gas storage tank (7) and the gear box (4) of the distributing device, and a first regulating valve (12) is installed.
2. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 1, wherein: the device is characterized by further comprising a nitrogen tank (13), a third pipeline (14) is arranged between the coal gas high-pressure gas storage tank (7) and the nitrogen tank (13), and a nitrogen security pressure supplementing system (15) is installed on the third pipeline (14).
3. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 2, wherein: the nitrogen tank (13) is communicated with the weighing charging bucket (1), and a nitrogen stop valve (16) is arranged between the nitrogen tank (13) and the weighing charging bucket (1).
4. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 1, wherein: a check valve (17) is arranged on a first pipeline (8) between the coal gas high-pressure gas storage tank (7) and the booster pump (9).
5. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 1, wherein: the weighing material tank (1) is arranged at the top of the blast furnace, the upper end of the weighing material tank is provided with a receiving hopper (18), an upper sealing valve (19) is arranged between the weighing material tank (1) and the receiving hopper (18), and a lower sealing valve (20) is arranged between the lower end of the weighing material tank (1) and the distributor gear box (4); a fourth pipeline (21) is arranged between the coal gas high-pressure gas storage tank (7) and the lower sealing valve (20), and a second regulating valve (22) is arranged on the fourth pipeline (21).
6. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 1, wherein: the material weighing bucket is characterized by further comprising a silencer (23), and pressure-equalizing blow-off valves (24) are arranged between the silencer (23) and the weighing bucket (1) and between the silencer and the cyclone dust collector (3).
7. The blast furnace top gas recovery device using the recovered gas seal distributor gear box as claimed in claim 1, wherein: the coal gas high-pressure gas storage tank (7) is connected with a drainage device (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921797302.0U CN210596125U (en) | 2019-10-24 | 2019-10-24 | Blast furnace top gas recovery device utilizing recovered gas to seal distributor gear box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921797302.0U CN210596125U (en) | 2019-10-24 | 2019-10-24 | Blast furnace top gas recovery device utilizing recovered gas to seal distributor gear box |
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| CN210596125U true CN210596125U (en) | 2020-05-22 |
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| CN201921797302.0U Active CN210596125U (en) | 2019-10-24 | 2019-10-24 | Blast furnace top gas recovery device utilizing recovered gas to seal distributor gear box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562677A (en) * | 2022-02-25 | 2022-05-31 | 大连大特气体有限公司 | Device for treating gas cylinder with damaged valve |
| CN115370957A (en) * | 2022-08-16 | 2022-11-22 | 西安热工研究院有限公司 | Double-tank hydraulic blast furnace gas compression system and operation method |
-
2019
- 2019-10-24 CN CN201921797302.0U patent/CN210596125U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562677A (en) * | 2022-02-25 | 2022-05-31 | 大连大特气体有限公司 | Device for treating gas cylinder with damaged valve |
| CN114562677B (en) * | 2022-02-25 | 2023-09-01 | 大连大特气体有限公司 | Device for processing damaged gas cylinder of valve |
| CN115370957A (en) * | 2022-08-16 | 2022-11-22 | 西安热工研究院有限公司 | Double-tank hydraulic blast furnace gas compression system and operation method |
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