CN107325826A - A coke oven power smoke exhaust system - Google Patents

Abstract

The present invention relates to a coke oven power smoke exhaust system, comprising a coke oven, a coke oven chimney, a smoke purification device and a fan; the coke oven and the coke oven chimney are connected through a main flue, a fan is arranged on the main flue close to the coke oven, a smoke purification device is arranged on the main flue or branch flue downstream of the fan, and the smoke purification device and the fan are independently controlled. After adopting the present invention, the smoke exhaust process of the coke oven always relies on the fan to provide power, and the coke oven chimney does not need hot standby, thereby avoiding the increase in production costs caused by hot standby of the coke oven chimney or re-heating of the smoke after purification, and ensuring the continuous stability of the smoke exhaust of the coke oven.

Description

A coke oven power smoke exhaust system

technical field

The invention relates to the technical field of coke ovens, in particular to a power smoke exhaust system for coke ovens.

Background technique

The coke oven smoke exhaust system directly connects the coke oven and the coke oven chimney through the main flue, and the coke oven flue gas is sucked by the coke oven chimney, enters the coke oven chimney through the flue, and is directly discharged. In order to ensure the suction of the coke oven chimney, the temperature of the coke oven chimney must be kept above a certain temperature from the oven stage until it is put into production, including the subsequent normal production process, that is, "hot standby". For a long time, the "hot standby" of coke oven chimneys has become a routine practice for coke oven flue gas emissions, and almost all processes related to coke oven flue gas cannot get rid of the "hot standby" of coke oven chimneys.

After the environmental protection department issued the relevant emission standards, the coking enterprises all processed the coke oven flue gas through the flue gas purification device, but still continued to use the coke oven chimney "hot standby" smoke exhaust method; as shown in Figure 1, the flue gas purification The device 5 is usually installed on the branch flue 6 between the coke oven 1 and the coke oven chimney 2, and the flue gas is introduced into the flue gas purification device 5 through the fan 4, and then discharged through the coke oven chimney 2; Flap valve 7, whether the flue gas is discharged from the main flue or the branch flue through the flue gas purification device, it must rely on the negative pressure generated by the "hot standby" of the chimney. Since the temperature of the purified flue gas is likely to be lower than the "hot standby" temperature, it is necessary to reheat the purified flue gas; and during the operation period such as the maintenance of the flue gas purification device, the fan will stop running, and the coke oven still needs to rely on The "hot standby" of the coke oven chimney for smoke extraction.

Contents of the invention

The invention provides a coke oven power smoke exhaust system. The coke oven smoke exhaust process is always powered by a fan, and the coke oven chimney does not need hot backup, thereby avoiding production problems caused by hot backup of the coke oven chimney or reheating of the flue gas after purification. The cost is increased, and the continuous stability of coke oven smoke exhaust is guaranteed.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A coke oven power smoke exhaust system, including a coke oven, a coke oven chimney, a flue gas purification device and a fan; the coke oven and the coke oven chimney are connected through a main flue, and a fan is arranged on the main flue close to the coke oven, A flue gas purification device is installed on the main flue or branch flue downstream of the fan, and the flue gas purification device and the fan are independently controlled.

There are at least two blowers, one of which is working, and the rest are spare parts.

When the flue gas purification device is installed on the branch flue, control valves are respectively set on the main flue and the branch flue near the upstream connection between the main flue and the branch flue.

Compared with prior art, the beneficial effect of the present invention is:

1) Get rid of the shackles of thermal buoyancy generated by the "hot standby" of the chimney for coke oven smoke exhaust, and innovate ideas for coke oven smoke exhaust technology;

2) In the case of adding a coke oven flue gas purification device, there is no need to consider the temperature rise of the purified flue gas, and the coke oven chimney does not need to be "hot standby". The resistance of the flue gas purification system can be overcome only by increasing the outlet pressure of the fan. Realize the smoke exhaust process;

3) It avoids the increase in production cost caused by hot standby of the coke oven chimney or the reheating of the flue gas after purification, and ensures the continuous stability of the exhaust gas of the coke oven.

Description of drawings

Figure 1 is a schematic structural view of a conventional coke oven smoke exhaust system.

Fig. 2 is a structural schematic diagram 1 of a coke oven power smoke exhaust system according to the present invention (the flue gas purification device is arranged on the main flue).

Fig. 3 is a structural schematic diagram II of a coke oven power smoke exhaust system according to the present invention (the flue gas purification device is installed on the branch flue).

In the figure: 1. Coke oven 2. Coke oven chimney 3. Main flue 4. Fan 5. Flue gas purification device 6. Branch flue 7. Control valve

detailed description

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

A coke oven power exhaust system according to the present invention includes a coke oven 1, a coke oven chimney 2, a flue gas purification device 5 and a fan 4; the coke oven 1 and the coke oven chimney 2 are connected through a main flue 3 A fan 4 is installed on the main flue 3 close to the coke oven 1, and a flue gas purification device 5 is installed on the main flue 3 or branch flue 6 downstream of the fan 4, and the flue gas purification device 5 and the fan 4 are independently controlled.

A flap valve is also provided on the main flue 3 close to the coke oven 1, and the fan 4 is arranged downstream of the flap valve.

There are at least two blowers 4, one of which works, and the rest are spare parts.

When the flue gas purification device 5 is installed on the branch flue 6, the main flue 3 and the branch flue 6 near the upstream connection between the main flue 3 and the branch flue 6 are provided with control valves 7 respectively.

As shown in Figure 2, the present invention places the fan 4 on the main flue 3 and is located upstream of the flue gas purification device 5, and the fan 4 and the flue gas purification device 5 are controlled separately. The power of the flue gas is led from the coke oven 1 to the flue gas purification device 5 for treatment and finally discharged through the coke oven chimney 2, and the coke oven chimney 2 does not need hot standby. When the flue gas purification device 5 breaks down or is overhauled, the fan 4 works normally, and the flue gas passes through the branch pipeline of the flue gas purification device 5 and is discharged through the coke oven chimney 2, thereby ensuring the normal working pressure of the coke oven 1.

As shown in Figure 3, it is another specific form of the present invention. The fan 4 is placed on the main flue 3 and upstream of the flue gas purification device 5. The fan 4 and the flue gas purification device 5 are controlled separately. The flue gas purification device 5 is placed on the branch flue 6; during normal flue gas purification and discharge, the control valve 7 on the branch flue 6 is opened, relying on the power generated by the fan 4 to lead the flue gas from the coke oven 1 to the flue gas purification device 5 for treatment and finally It is discharged through the coke oven chimney 2, and the coke oven chimney 2 does not need hot standby. When the flue gas purification device 5 breaks down or is overhauled, the fan 4 works normally, the control valve 7 on the branch flue 6 is closed, the control valve 7 on the main flue 3 is opened, and the flue gas passes through the main flue 3 directly. And discharge through the coke oven chimney 2, so as to ensure the normal working pressure of the coke oven 1.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (3)

1. a kind of coke oven power smoke evacuation system, including coke oven, coke oven chimney, smoke eliminator and air-introduced machine；Characterized in that, It is connected between the coke oven and coke oven chimney by flue collector, air-introduced machine is set on the flue collector of coke oven, air-introduced machine downstream Smoke eliminator, smoke eliminator and air-introduced machine independent control are set on flue collector or by-pass flue.

2. a kind of coke oven power smoke evacuation system according to claim 1, it is characterised in that the air-introduced machine is at least 2, One work, remaining is spare unit.

3. a kind of coke oven power smoke evacuation system according to claim 1, it is characterised in that the smoke eliminator is located at When on by-pass flue, control valve is set respectively on the flue collector and by-pass flue close to flue collector with by-pass flue upstream connectivity part Door.