CN218115482U - Pressure-equalizing coal gas full-recovery system - Google Patents
Pressure-equalizing coal gas full-recovery system Download PDFInfo
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- CN218115482U CN218115482U CN202222330982.3U CN202222330982U CN218115482U CN 218115482 U CN218115482 U CN 218115482U CN 202222330982 U CN202222330982 U CN 202222330982U CN 218115482 U CN218115482 U CN 218115482U
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Abstract
The utility model discloses a pressure-equalizing coal gas full recovery system, which relates to the technical field of blast furnace gas recovery and aims to accelerate the recovery rate before the recovery must be finished; the utility model comprises a full recovery device connected in parallel on a connecting pipeline between a cyclone dust collector and a bag-type dust collector, which comprises a second gas recovery valve, a gas absorption tank, a check valve and an injection nozzle which are connected in sequence; a gas pipe for parallel connection is arranged on the connecting pipeline, a check valve is arranged on the gas pipe, and a gas recovery valve is positioned between the cyclone dust collector and the gas pipe for parallel connection; one end of the gas outlet pipe and the parallel gas pipe of the cyclone dust collector are connected with a tee joint at the gas inlet end of the full recovery device, and the other end of the gas inlet pipe and the parallel gas pipe of the bag-type dust collector are connected with a tee joint at the gas outlet end of the pipeline of the full recovery device; the utility model discloses it is simple convenient to control, and it is easy to maintain, and running cost is cheap, does not have newly-increased main equipment and power equipment, in the security of guaranteeing for retrieve speed before the end.
Description
Technical Field
The utility model relates to a blast furnace gas retrieves technical field, specifically is a full recovery system of voltage-sharing coal gas.
Background
After the blast furnace top charging bucket discharges materials into the furnace, gas during pressure equalizing is still remained in the charging bucket, and the pressure equalizing gas in the charging bucket needs to be released before the charging bucket feeds the materials. In recent years, along with the increasing environmental requirements, the recovery of the pressure-equalizing gas in the charging bucket is imperative. At present, the unpowered pressure-equalizing gas recovery system commonly used is roughly divided into two types: one is that the pressure-equalizing coal gas of the charging bucket passes through a cyclone dust collector and a bag-type dust collector and then is connected into a low-pressure clean coal gas pipe network (shown in figure 1); in order to improve the recovery rate and shorten the recovery time, the other system is that on the basis of the system, other gaseous media are adopted on a recovery pipeline for injection (see figure 2), for example, the utility model patent application with the publication number of CN102337364A and the name of a gas recovery device in the blast furnace top pressure-equalizing and diffusing process discloses a similar recovery system; the two recovery systems have the common point that purified coal gas is introduced into a pipe network after passing through a cyclone dust collector, a bag-type dust collector or other dust removing equipment, and are also connected with a pressure equalizing and diffusing pipeline and a plurality of valves.
However, the charging and discharging of the charging bucket are performed alternately frequently, and the releasing process of the high-pressure gas in the charging bucket to the low-pressure gas pipeline is long, so that the gas in the charging bucket cannot be recovered completely, the gas recovery valve needs to be closed, and the residual gas in the charging bucket is still discharged to the atmosphere.
The second system is used for injecting and boosting the medium on the existing recovery pipeline, and can only be used for injecting and boosting after the coal gas recovery system is started, although the coal gas recovery rate in unit time can be improved, the recovery rate is slower and slower along with the gradual reduction of the pressure-equalizing retained coal gas pressure, the limitation of the coal gas recovery time is realized, and the purpose of complete recovery cannot be achieved.
If power equipment such as a fan is additionally arranged, the fan cannot normally work due to high dust content and high humidity of the coal gas diffused by the charging bucket, and the operation and maintenance cost of the equipment is further increased, which is also a main reason why the fan cannot be adopted in the practical application of the field. Therefore, under the unpowered condition, how to accelerate the recovery rate before the recovery must be finished becomes a difficult point which must be broken through; in conclusion, a pressure equalizing gas full recovery system is needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a voltage-sharing coal gas full recovery system to accelerate the recovery rate before retrieving must finish.
In order to achieve the above purpose, the utility model provides a following technical scheme: a pressure-equalizing gas full-recovery system comprises a charging bucket, a cyclone dust collector, a gas recovery valve I, a bag-type dust collector, a clean gas pipe network and a full-recovery device, wherein the charging bucket, the cyclone dust collector, the gas recovery valve I, the bag-type dust collector and the clean gas pipe network are sequentially communicated through a gas pipe; the full recovery device comprises a second gas recovery valve, a gas absorption tank, a second check valve and an injection nozzle which are sequentially connected through pipelines in the direction from the charging tank to the clean gas pipe network, wherein the gas outlet direction of the injection nozzle faces towards the bag-type dust remover, and the passage directions of the two check valves both face towards the bag-type dust remover through a cyclone dust remover; one end of the gas outlet pipe of the cyclone dust collector, one end of the gas pipe for parallel connection and the gas inlet end of the pipeline of the full recovery device are connected through a tee joint, and one end of the gas inlet pipe of the bag dust collector, the other end of the gas pipe for parallel connection and the gas outlet end of the pipeline of the full recovery device are connected through a tee joint.
Preferably, the injection medium pipeline of the injection nozzle is provided with a control valve.
Preferably, the length of a pipeline between the gas outlet end of the cyclone dust collector and one end of the gas absorption tank close to the gas recovery valve II is not more than 10 meters.
Preferably, the injection medium of the injection nozzle is nitrogen, steam or coal gas.
Preferably, the middle part of the gas pipe for parallel connection is provided with an injection device which is positioned between the first check valve and the bag-type dust remover.
Preferably, a first cut-off valve, a first blind plate valve and a first pressure equalizing valve are sequentially arranged on a pipeline between the charging bucket and the cyclone dust collector; one end of the first coal gas recovery valve, which is close to the cyclone dust collector, is sequentially connected with a second blind plate valve and a second stop valve; a pressure equalizing pipeline and a bleeding pipeline are communicated on a pipeline between the second cut-off valve and the cyclone dust collector, the pressure equalizing pipeline is used for providing high-pressure clean coal gas, a third cut-off valve, a third blind plate valve and a second pressure equalizing valve are sequentially arranged along the advancing direction of the coal gas, the bleeding pipeline is used for bleeding in accidents, and a fourth cut-off valve, a fourth blind plate valve, an accident bleeding valve and an accident bleeding silencer are sequentially arranged along the bleeding air outlet direction; and a fifth blind plate valve and a fifth stop valve are sequentially arranged on a pipeline between the bag-type dust collector and the clean gas pipe network.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this full recovery system of voltage-sharing coal gas utilizes the negative pressure environment that coal gas absorption tank and injection nozzle made in advance, opens when recovery time is about to finish, can be in the lower back of material jar surplus voltage-sharing coal gas pressure, and the completion is retrieved with higher speed to coal gas, can adapt to the frequent alternate operation of reinforced and row of material jar more.
2. This full recovery system of voltage-sharing coal gas reforms transform on current recovery system and realizes easily, does not have newly-increased macro equipment and power equipment, when guaranteeing the security, can accelerate the speed of retrieving before retrieving must finishing, and remaining voltage-sharing coal gas in the material jar after the at utmost reduces the recovery time, can maximize voltage-sharing coal gas full recovery, further reduces and avoids outer row pollution even.
3. The pressure-equalizing coal gas full-recovery system is simple and convenient to control, easy to maintain and low in operation cost.
Drawings
FIG. 1 is a schematic view of a gas recovery system commonly available in the market;
FIG. 2 is a schematic view of another gas recovery system in the market;
fig. 3 is a schematic structural diagram of an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another embodiment of the present invention.
In the figure: 1. a charging bucket; 2. a shut-off valve; 3. a blind plate valve; 4. a cyclone dust collector; 5. a first gas recovery valve; 6. a pressure equalizing valve; 7. an accident relief valve; 8. an accident dissipation muffler; 9. a bag-type dust collector; 10. a control valve; 11. an injection nozzle; 12. a gas absorption tank; 13. a second gas recovery valve; 14. a check valve.
Detailed Description
Fig. 1 and 2 show two very common existing recovery systems, including a charging bucket 1, a cyclone dust collector 4, a first gas recovery valve 5, a bag-type dust collector 9 and a clean gas pipe network which are sequentially communicated by a gas pipe, wherein the difference in fig. 2 is that only an injection device is arranged on a connecting pipeline between the cyclone dust collector 4 and the bag-type dust collector 9 to accelerate the recovery speed;
in addition, referring to fig. 1 and 2, the conventional recovery system is usually further provided with the following common valve elements, and a first cut-off valve 2, a first blind plate valve 3 and a first pressure equalizing valve 6 are sequentially arranged on a pipeline between the charging bucket 1 and the cyclone dust collector 4; one end of the first coal gas recovery valve 5, which is close to the cyclone dust collector 4, is sequentially connected with a second blind plate valve 3 and a second cut-off valve 2; a pressure equalizing pipeline and a bleeding pipeline are communicated with a pipeline between the second cut-off valve 2 and the cyclone dust collector 4, the pressure equalizing pipeline is used for providing high-pressure clean coal gas, a third cut-off valve 2, a third blind plate valve 3 and a second pressure equalizing valve 6 are sequentially arranged along the advancing direction of the coal gas, the bleeding pipeline is used for bleeding in an accident, and a fourth cut-off valve 2, a fourth blind plate valve 3, an accident bleeding valve 7 and an accident bleeding silencer 8 are sequentially arranged along the bleeding direction; a fifth blind plate valve 3 and a fifth cut-off valve 2 are sequentially arranged on a pipeline between the bag-type dust collector 9 and the clean gas pipe network.
In order to solve the problems mentioned in the background art, the utility model provides a pressure-equalizing gas full recovery system, as shown in fig. 3 in particular, a pressure-equalizing gas full recovery system, which comprises a charging bucket 1, a cyclone dust collector 4, a gas recovery valve I5, a bag-type dust collector 9 and a clean gas pipe network which are sequentially communicated by a gas pipe, and further comprises a full recovery device which is connected in parallel on a connecting pipeline between the cyclone dust collector 4 and the bag-type dust collector 9, wherein a section of gas pipe for parallel connection is arranged on the connecting pipeline, after the gas recovery valve II 13 is opened, the gas in the gas pipe for parallel connection is sucked back to the gas absorption tank 12 under the action of negative pressure of the gas absorption tank 12, a first check valve 14 is arranged on the gas pipe for parallel connection, and the gas recovery valve I5 is positioned between the cyclone dust collector 4 and the gas pipe for parallel connection; the full recovery device comprises a second gas recovery valve 13, a gas absorption tank 12, a second check valve 14 and an injection nozzle 11 which are sequentially connected through pipelines along the direction from the charging bucket 1 to the clean gas pipe network, wherein the gas outlet direction of the injection nozzle 11 faces the bag-type dust remover 9, and the passage directions of the two check valves 14 both face the bag-type dust remover 9 through the cyclone dust remover 4; one end of the air outlet pipe of the cyclone dust collector 4, one end of the gas pipe for parallel connection and the air inlet end of the pipeline of the full recovery device are connected through a tee joint, and one end of the air inlet pipe of the bag dust collector 9, the other end of the gas pipe for parallel connection and the air outlet end of the pipeline of the full recovery device are connected through a tee joint.
The utility model discloses a use method as follows:
and (3) conventional recovery process: the second coal gas recovery valve 13 is closed, the injection nozzle 11 is opened, and the coal gas absorption tank 12 is in a negative pressure state; and opening a first gas recovery valve 5 of the existing recovery system to recover the gas.
The whole recovery process: before the coal gas recovery time is over, opening a second coal gas recovery valve 13, and accelerating the coal gas recovery by utilizing the negative pressure in the coal gas absorption tank 12; when the pressure in the charging bucket 1 is equal to the atmospheric pressure, closing the first coal gas recovery valve 5 and the second coal gas recovery valve 13, and ending the whole coal gas recovery process;
as shown in fig. 4, in an embodiment, an injection device is disposed in the middle of the parallel gas pipe and located between the first check valve 14 and the bag-type dust collector 9, which can further accelerate the gas recovery speed in the conventional recovery process, and due to the arrangement of the two check valves 14, after the second gas recovery valve 13 is opened, the back suction phenomenon does not occur in the two pipelines.
In a preferred embodiment, the opening degree of the control valve 10 is adjusted to control the injection nozzle 11, after the whole coal gas recovery process is finished, the injection nozzle 11 is in a continuous working state, the coal gas absorption tank 12 starts to form negative pressure, and the next recovery process is waited.
In addition, in practice, the closer the full recovery device is to the charging bucket 1, the better the full recovery effect of the gas is, therefore, the length of the pipeline from the gas outlet end of the cyclone dust collector 4 to the end of the gas absorption tank 12 close to the gas recovery valve II 13 is not more than 10 meters, and the pipeline can be set within 5 meters under the condition that the condition allows.
The injection nozzle 11 and the injection device can be any type which is common in the market, preferably the type which is provided with three interfaces of a high-pressure gas inlet, a low-pressure gas inlet and a mixed gas outlet, the injection medium of the injection nozzle 11 can be nitrogen, steam or coal gas, and the like, and when steam is adopted, the bag-type dust remover 9 can be replaced by a dust removal and water removal device such as a spray tower and the like.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (6)
1. The utility model provides a full recovery system of voltage-sharing coal gas, includes by material jar (1), cyclone (4), gas recovery valve (5), sack cleaner (9) and the net gas pipe network that the trachea communicates in proper order, its characterized in that: the full recovery device is connected in parallel to a connecting pipeline between the cyclone dust collector (4) and the bag-type dust collector (9), a section of gas pipe for parallel connection is arranged on the connecting pipeline, a first check valve (14) is arranged on the gas pipe for parallel connection, and a first gas recovery valve (5) is positioned between the cyclone dust collector (4) and the gas pipe for parallel connection; the full recovery device comprises a second coal gas recovery valve (13), a coal gas absorption tank (12), a second check valve (14) and an injection nozzle (11) which are sequentially connected in the direction from the charging bucket (1) to the clean coal gas pipe network through pipelines, wherein the air outlet direction of the injection nozzle (11) faces towards the bag-type dust remover (9), and the passage directions of the two check valves (14) both face towards the bag-type dust remover (9) through the cyclone dust remover (4); one end of an air outlet pipe of the cyclone dust collector (4), one end of a gas pipe for parallel connection and the air inlet end of the pipeline of the full recovery device are connected through a tee joint, and one end of an air inlet pipe of the bag dust collector (9), the other end of the gas pipe for parallel connection and the air outlet end of the pipeline of the full recovery device are connected through a tee joint.
2. The pressure-equalizing gas full-recovery system according to claim 1, characterized in that: and a control valve (10) is arranged on an injection medium pipeline of the injection nozzle (11).
3. The pressure-equalizing gas full-recovery system according to claim 1, characterized in that: the length of a pipeline between the gas outlet end of the cyclone dust collector (4) and one end of the gas absorption tank (12) close to the gas recovery valve II (13) is not more than 10 meters.
4. The pressure-equalizing gas full-recovery system according to claim 1, characterized in that: the injection medium of the injection nozzle (11) is nitrogen, steam or coal gas.
5. The pressure-equalizing gas full-recovery system according to claim 1, characterized in that: an injection device is arranged in the middle of the parallel gas pipe and is positioned between the first check valve (14) and the bag-type dust collector (9).
6. The pressure-equalizing gas full-recovery system according to claim 1, characterized in that: a first stop valve (2), a first blind plate valve (3) and a first pressure equalizing valve (6) are sequentially arranged on a pipeline between the charging bucket (1) and the cyclone dust collector (4); one end of the first coal gas recovery valve (5) close to the cyclone dust collector (4) is sequentially connected with a second blind plate valve (3) and a second stop valve (2); a pressure equalizing pipeline and a bleeding pipeline are communicated with a pipeline between the second stop valve (2) and the cyclone dust collector (4), the pressure equalizing pipeline is used for providing high-pressure clean coal gas, a third stop valve (2), a third blind plate valve (3) and a second pressure equalizing valve (6) are sequentially arranged along the advancing direction of the coal gas, the bleeding pipeline is used for bleeding during accidents, and a fourth stop valve (2), a fourth blind plate valve (3), an accident bleeding valve (7) and an accident bleeding silencer (8) are sequentially arranged along the bleeding direction; a fifth blind plate valve (3) and a fifth stop valve (2) are sequentially arranged on the pipeline between the bag-type dust collector (9) and the clean gas pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222330982.3U CN218115482U (en) | 2022-09-02 | 2022-09-02 | Pressure-equalizing coal gas full-recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222330982.3U CN218115482U (en) | 2022-09-02 | 2022-09-02 | Pressure-equalizing coal gas full-recovery system |
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| CN218115482U true CN218115482U (en) | 2022-12-23 |
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| CN202222330982.3U Active CN218115482U (en) | 2022-09-02 | 2022-09-02 | Pressure-equalizing coal gas full-recovery system |
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