TWI447218B - Coke wet quenching device and quenching control method - Google Patents

Description

Coke wet quenching device and quenching control method

The invention relates to a coke wet quenching device and a quenching control method, in particular to a coke wet quenching device and a quenching control method capable of pre-spraying water and controlling coke moisture.

After the coal is heated and retorted in the coke oven for 18 to 24 hours, it forms a block coke of 900 ° C to 1100 ° C. In the coke oven, the batch operation is carried out, and about 20.5 metric tons of coke is produced every 10 minutes, and the temperature of each furnace is high. The red hot coke is transported to the quenching tower via a quench train for water cooling to about 60 ° C to 100 ° C, and the coke moisture content is controlled to < 4%, so that the conveyor belt is transported to the blast furnace for use.

In order to avoid the uneven water content of the coke in the same quenching train after spraying, the quenching train carrying the coke enters the quenching tower and the cooling assembly provided in the quenching tower is opened, so that the cooling component is coke sprayed with water. Cooling coke, wherein it takes about 30 seconds for the quench train to enter the quenching tower until the positioning is completed. During the driving process, the high temperature coke generates heat radiation and bakes the quenching tower, resulting in the lining of the quenching tower, the dust filter grid, etc. Structural damage, resulting in work safety problems and reducing the service life of the quenching tower.

The main object of the present invention is to provide a coke wet quenching The fire device and the quenching control method are used to improve the high temperature coke heat radiation baking quenching tower, causing the quenching tower damage and the safety problem.

In order to achieve the foregoing object, a coke wet quenching device designed by the present invention comprises: a quenching tower having a water storage cylinder, a quenching chamber is disposed therein, and an inlet and an outlet are formed; and a control unit is provided a quenching tower; a quenching module disposed in the quenching tower and controlled by the control unit, and comprising a quenching water jet assembly extending into the quenching chamber and communicating with the water storage tank; and a pre-water jetting module The pre-water jetting module is disposed in the quenching tower and is controlled by the control unit. The pre-spraying module comprises an inductive component and a pre-spraying component. The inductive component is disposed outside the quenching tower and electrically connected to the control unit, and the pre-spraying component is controlled On the front side of the control unit and above the inlet, the pre-water jet assembly comprises a water pipe connected to the water storage tank, and the water pipe is provided with a plurality of pre-spray nozzles arranged at intervals.

In order to achieve the foregoing, the coke wet quenching control method designed by the invention comprises: a pre-spraying step, a quenching train carrying coke passes through an induction component outside the quenching tower, the sensing component transmits a signal to the control unit, and the control unit drives the automatic The switch motor valve is opened and the pre-spray nozzle sprinkles the coke passing through the quenching train. When the control unit completely enters the quenching chamber, the automatic switch motor valve is closed to stop the pre-spray nozzle from sprinkling; the quenching step, the quenching train 2 Segment positioning, in the first stage of quenching train positioning, after the quenching train is positioned in the quenching chamber, the control unit controls the quenching nozzle to quench The coke sprinkling of the train, followed by the second stage quenching train positioning, after sprinkling the water for a period of time in the first stage of the quenching train, the quenching train moves the appropriate distance to adjust the spraying range of the quenching nozzle sprinkling; and the second stage quenching train After a period of watering in the positioning, the control unit controls the quenching nozzle to stop watering, and the quenching train moves out of the quenching chamber of the quenching tower.

According to the above, the coke wet quenching device is provided with a pre-spraying module to perform a pre-spraying step of the coke wet quenching control method, and the pre-spraying assembly can be quenched before the quenching train passes through the induction component to the inlet of the quenching tower. The coke sprinkling water carried by the vehicle is pre-cooled. After the pre-cooling, the quenching train enters the quenching chamber and the quenching module is used for the quenching step. During the progress of the quenching step, the temperature of the coke has been pre-cooled, and the thermal radiation of the coke is reduced to the quenching tower. Damage, which in turn increases safety and can extend the life of the quenching tower.

10‧‧‧Quenching Tower

11‧‧‧Water storage tank

12‧‧‧Quenching room

13‧‧‧ entrance

14‧‧‧Export

20‧‧‧Control unit

21‧‧‧ sensor

30‧‧‧Quenching module

31‧‧‧ Pipe fittings

32‧‧‧Quenching nozzle

40‧‧‧Pre-water spray module

41‧‧‧ water pipes

42‧‧‧Pre-spray nozzle

50‧‧ ‧Quench train

51‧‧‧ Track

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front elevational view showing a preferred embodiment of a coke wet quenching apparatus of the present invention.

Figure 2 is a partial enlarged view of Figure 1.

3 is a side elevational cross-sectional view showing a preferred embodiment of the coke wet quenching apparatus of the present invention.

Figure 4 is a front elevational view showing the pre-spraying step of the coke wet quenching control method of the present invention.

Fig. 5 is a side elevational view showing the pre-spraying step of the coke wet quenching control method of the present invention.

Figure 6: The first stage quenching train of the coke wet quenching control method of the present invention A side view of the positioning.

Fig. 7 is a side elevational view showing the quenching completion of the coke wet quenching control method of the present invention.

1 to 3, a preferred embodiment of a coke wet quenching apparatus according to the present invention includes a quenching tower 10 having a water storage tank 11, a control unit 20, a quenching module 30, and a pre-spraying mold. Group 40.

A quenching chamber 12 is disposed inside the quenching tower 10, and an inlet 13 and an outlet 14 are formed, and the water storage cylinder 11 is disposed on the quenching tower 10.

In the preferred embodiment of the present invention, the control unit 20 includes a timer, and the control unit 20 includes a plurality of sensors 21 disposed at a plurality of intervals and located in the quenching chamber 12.

The quenching module 30 is disposed in the quenching tower 10 and controlled by the control unit 20, and includes a quenching water jet assembly extending into the quenching chamber 12 and communicating with the water storage tank 11. In the preferred embodiment of the present invention, the quenching The water spray assembly includes a water spray unit that is arranged at a plurality of intervals and communicates with the water storage tank 11. The water spray units each include a tubular member 31 extending laterally into the quenching chamber 12, and the tubular member 31 is provided with a plurality of quenching nozzles 32 arranged at intervals.

The pre-spraying module 40 is disposed in the quenching tower 10 and controlled by the control unit 20. The pre-spraying module 40 includes an inductive component and a pre-spraying component. The inductive component is disposed outside the quenching tower 10 and electrically The control unit 20 is connected to the front side of the control unit 20 and located above the inlet 13. The pre-water jet assembly comprises a water pipe 41 connected to the water storage tank 11, and the water pipe 41 is arranged at a plurality of intervals. Pre The water spray nozzle 42 includes an automatic switch motor valve controlled by the control unit 20 to control watering of the pre-spray nozzle 42.

Referring to FIG. 4 to FIG. 5, the coke wet quenching control method of the present invention first performs a pre-spraying step with a pre-spray module 40, and the quench train 50 carrying the coke travels on the rail 51 and faces the inlet 13 of the quenching tower 10, and is quenched. When the vehicle 50 passes through the sensing component outside the quenching tower 10, the sensing component transmits a signal to the control unit 20, the control unit 20 drives the automatic switching motor valve to open, and the pre-spraying nozzle 42 sprinkles the coke passing through the quenching train 50, and the control unit 20 When the quenching train 50 completely enters the quenching chamber 12, the automatic switching motor valve is controlled to be closed to stop the pre-spraying nozzle 42 from sprinkling water.

Referring to FIG. 6 , the quenching module 30 is used to perform the quenching step, the quenching train adopts the two-stage positioning, and the quenching train is positioned in the first stage. After the quenching train 50 is positioned in the quenching chamber 12 , the control unit 20 controls the quenching nozzle 32 . Sprinkle water on the coke of the quenching train 50.

Then, the second-stage quenching train is positioned. After the watering for a certain period of time in the first stage of the quenching train, the quenching train 50 moves the appropriate distance to adjust the spraying range of the quenching nozzle 32, and the water content of the coke carried by the uniform quenching train 50 .

Referring to FIG. 7, after a period of watering in the second stage quenching train positioning, the control unit 20 controls the quenching nozzle 32 to stop watering, and moves the quenching train 50 out of the quenching chamber 12 of the quenching tower 10.

In the above, in the pre-spraying step and the quenching step, the control unit 20 performs time control by a timer to control the sprinkling of the pre-spraying nozzle 42 and the quenching nozzle 32.

In the above, in the pre-spraying step and the quenching step, the control unit 20 senses the signal transmitted by the quenching train 50 by the inductor 21 to perform an induction control to control the sprinkling of the pre-spraying nozzle 42 and the quenching nozzle 32.

The sprayed wastewater is returned to the sedimentation tank, filtered, recovered and stored in the water storage tank 11 of the quenching tower 10, and used as the quenching tower 10 in water.

Further analysis of the influence of heat radiation on the inclined top plank in the quenching tower 10: the inclined top plank is the largest area affected by the heat radiation, according to the thermal radiation Stefan-Boltzmann law: Q=εAσT ⁴ , where: ε: Gray body reflectivity, coke is calculated as 0.95, wood (ironwood) is 0.9; A: is the surface area of the emission source; σ = 5.676 × 10 ^-8 W / m ² .K ⁴ ; T: the temperature of the hot coke before improvement is calculated at 1273K After improvement, it is calculated at 598K.

The heat of radiant heat of the slanted top plank in the quenching tower 10 per unit time is: Q=Q _{from red coke-} Q _{iron wood release} = cos θ × ε _coke × A _coke × σ × T _coke ⁴ - ε _wood × A _wood × σ × T _wood ⁴

Unit time per unit area quenching tower 10 inside the inclined top wood board heat radiation heat flux q is: q = Q / A _wood = cos θ × ε _jo × A _coke / A _wood × σ × T _coke ⁴ - ε _wood × σ × T _wood ⁴ = 0.83 × 0.95 × 3.5 / 4.7 × σ × 1273 ⁴ (after improvement 598 ⁴ ) - 0.9 × σ × 303 ⁴ = 87093 (3831 after improvement) W / m ²

With the sloping top plank closest to the inlet 13 of the quenching tower 10, the baking time is 30 seconds, and the total heat of the slanted top plank in the quenching tower 10 per unit area is heated by heat: Q'=q×Δt=87093 (3831 after improvement) ) × 30 (sec) = 720 (31.7 after improvement) W. h/m ² =619000 (after improvement 2723) cal/m ²

For per square meter of sloping top plank: Q'*1m ² = m (mass g) * s (specific heat cal / g. ° C) * △ T (rise temperature ° C) = 22000 * 0.5 * △ T

Before the improvement, △T=56°C, and after the improvement, △T=2.5°C, effectively reducing the radiant heat of the quenching tower 10 by the red hot coke grilling surface, improving the temperature rise of the pre-quenching tower 10 during the hot-baking period by 56°C, and the temperature after the improvement only rises by 2.5°C.

In summary, the pre-water spray module 40 of the coke wet quenching device is configured to perform a pre-spraying step of the coke wet quenching control method, before the quench train 50 passes through the induction assembly to the inlet 13 of the quenching tower 10, the pre-preparation The water spray component can pre-cool the coke sprinkling water carried by the quenching train 50, reduce the damage of the coke heat radiation to the quenching tower 10, thereby improving the safety of the work, and prolonging the service life of the quenching tower 10, and the quenching train 50 after the pre-cooling. Entering the quenching chamber 12 for positioning, the quenching step can be performed by using the time control tube and the induction control tube, and the quenching train adopts the two-stage positioning, so that the coke carried by the quenching train 50 can be evenly sprinkled, so that the coke water content is uniform, and the protection quenching is taken into consideration. tower 10 and the purpose of effectively controlling the moisture content of coke.

10‧‧‧Quenching Tower

11‧‧‧Water storage tank

12‧‧‧Quenching room

13‧‧‧ entrance

20‧‧‧Control unit

21‧‧‧ sensor

30‧‧‧Quenching module

31‧‧‧ Pipe fittings

32‧‧‧Quenching nozzle

40‧‧‧Pre-water spray module

41‧‧‧ water pipes

42‧‧‧Pre-spray nozzle

51‧‧‧ Track

Claims (8)

A coke wet quenching device, comprising: a quenching tower having a water storage cylinder, wherein a quenching chamber is disposed inside, and an inlet and an outlet are formed; a control unit is disposed on the quenching tower; a quenching module, The system is disposed in the quenching tower and controlled by the control unit, and includes a quenching water jet assembly extending into the quenching chamber and communicating with the water storage tank; and a pre-water jetting module disposed on the quenching tower and controlled by the a control unit, the pre-water jet module includes an inductive component and a pre-spraying component, the inductive component is disposed outside the quenching tower and electrically connected to the control unit, and the pre-spraying component is controlled by the control unit and located above the inlet In the front side, the pre-water jet assembly comprises a water pipe connected to the water storage tank, and the water pipe is provided with a plurality of pre-spray nozzles arranged at intervals. The coke wet quenching apparatus of claim 1, wherein the control unit comprises a timer, the pre-spray assembly comprising an automatic switch motor valve controlled by the control unit to control the pre-spray nozzle Sprinkling water. The coke wet quenching apparatus of claim 1 or 2, wherein the control unit comprises a plurality of sensors disposed at intervals and located in the quenching chamber. The coke wet quenching apparatus according to claim 1 or 2, wherein the quenching water jet assembly comprises a water spray unit arranged at a plurality of intervals and communicating with the water storage tank, the water spray units each including a pipe member extending laterally into the quenching chamber. And the tube is provided with a plurality of quenching nozzles arranged at intervals. The coke wet quenching device according to claim 3, wherein the quenching The fire sprinkler assembly comprises a plurality of water spray units arranged at intervals. The water spray units each comprise a tubular member extending into the quenching chamber and communicating with the water storage tank, and the tubular member is provided with a plurality of quenching nozzles arranged at intervals. A coke wet quenching control method comprises: a pre-spraying step, a quenching train carrying coke passes through an induction component outside the quenching tower, the sensing component transmits a signal to the control unit, the control unit drives the automatic switch motor valve to open and the pre-spray nozzle pair passes The coke sprinkling of the quenching train, the control unit completely enters the quenching chamber in the quenching train, then controls the automatic switch motor valve to close to stop the pre-spraying nozzle from sprinkling; the quenching step, the quenching train adopts the two-stage positioning, and quenches in the first stage After the vehicle is positioned, the quenching train is positioned in the quenching chamber, the control unit controls the quenching nozzle to sprinkle the coke of the quenching train, and then the second stage quenching train is positioned. After the watering in the first stage of the quenching train, the quenching train moves properly. The spraying range of the quenching nozzle sprinkling water is adjusted according to the distance; and after the watering in the second stage quenching train positioning for a period of time, the control unit controls the quenching nozzle to stop watering, and the quenching train moves out of the quenching chamber of the quenching tower. The coke wet quenching control method according to claim 6, wherein in the pre-spraying step and the quenching step, the control unit performs time control by a timer to control sprinkling of the pre-spraying nozzle and the quenching nozzle. The coke wet quenching control method according to claim 6, wherein in the pre-spraying step and the quenching step, the control unit inductively controls the signal transmitted by the induction induction quenching train to control the pre-spray nozzle and the quenching Sprinkler of the nozzle.