阅读说明：本技术 一种焦炉湿法熄焦的方法 (Coke quenching method of coke oven by wet method ) 是由 李德平 石慧峰 黄选斋 邹全荣 范国光 陈萌 穆应东 陈锡通 闫永航 李智 吴美 于 2021-08-25 设计创作，主要内容包括：本发明属于焦炉熄焦技术领域,公开了一种焦炉湿法熄焦的方法,包括如下步骤：S1、根据高炉使用焦炭的需求,确定焦炉日产量和周转时间；S2、根据日产量和周转时间,设定熄焦塔喷淋熄焦水温度,并调整冷却水补充量,周转时间越长,设定的熄焦水温度越低；S3、设定熄焦总时间T1,调节水阀阀位开度,开始喷淋熄焦,先后进行低压喷淋、中压喷淋和高压喷淋,周转时间越长,熄焦总时间T1越长；S4、对喷淋后的水熄焦沥水,设定沥水时间为T2,将沥水后的焦炭放置在晾焦台晾晒。本发明的焦炉湿法熄焦的方法,能够降低焦炭含水量,并稳定焦炭水分,改善焦炭粒级,有利于提高运焦皮带的使用寿命,保证高炉的稳定、高效运行,降低生产成本。(The invention belongs to the technical field of coke quenching of coke ovens, and discloses a method for quenching coke by a coke oven wet method, which comprises the following steps: s1, determining the daily output and turnover time of the coke oven according to the coke using requirements of the blast furnace; s2, setting the temperature of the spray quenching water of the quenching tower according to daily output and turnover time, and adjusting the supplement amount of cooling water, wherein the longer the turnover time is, the lower the set temperature of the quenching water is; s3, setting the total coke quenching time T1, adjusting the valve position opening degree of a water valve, starting spraying coke quenching, and sequentially carrying out low-pressure spraying, medium-pressure spraying and high-pressure spraying, wherein the longer the turnover time is, the longer the total coke quenching time T1 is; s4, quenching and draining the sprayed water, setting the draining time to be T2, and placing the drained coke on a coke drying table for airing. The coke oven wet quenching method can reduce the water content of the coke, stabilize the water content of the coke, improve the particle size fraction of the coke, is beneficial to prolonging the service life of a coke conveying belt, ensures the stable and efficient operation of a blast furnace and reduces the production cost.)

1. A coke oven wet quenching method is characterized by comprising the following steps:

step S1, determining the daily output and turnover time of coke oven production according to the coke using requirement of the blast furnace;

step S2, setting the temperature of quenching water sprayed by a high-level water tank of a quenching tower according to the daily output and the turnover time, and adjusting the supplement amount of cooling water for quenching, wherein the longer the turnover time of the coke oven is, the lower the temperature of the set quenching water is;

s3, setting total coke quenching time T1, adjusting valve position opening of a water valve, starting spraying coke quenching, and sequentially and respectively carrying out low-pressure spraying, medium-pressure spraying and high-pressure spraying, wherein the longer the turnover time of the coke oven is, the longer the total coke quenching time T1 is;

and S4, draining the sprayed water-quenched coke, setting draining time T2, and uniformly placing the drained coke on a coke drying table for airing.

2. The method for wet quenching of coke oven of claim 1, wherein in step S2, the interval range of the turnaround time is divided into six time periods, which are [19,20] hours, (20-21] hours, (21-22] hours, (22-23] hours, (23-24] hours, and (24-30] hours, respectively.

3. The method of coke oven wet quenching according to claim 2, wherein in the step S2, when the turnaround time is within [19,20] hours, the quenching water temperature is 60 ℃ ± 0.5 ℃; the quenching water temperature is 59 ℃ + -0.5 ℃ when the turnaround time is within (20-21] hours, 58 ℃ + -0.5 ℃ when the turnaround time is within (21-22] hours, 57 ℃ + -0.5 ℃ when the turnaround time is within (22-23] hours, 56 ℃ + -0.5 ℃ when the turnaround time is within (23-24] hours, and 55 ℃ + -0.5 ℃ when the turnaround time is within (24-30] hours.

4. The coke oven wet quenching method of claim 2, wherein in the step S3, when the turnaround time is within [19,20] hours, the total quenching time T1 is equal to 58S; the total quenching time T1 equals 60s when the turnaround time is within (20-21] hours, the total quenching time T1 equals 61s when the turnaround time is within (21-22] hours, the total quenching time T1 equals 63s when the turnaround time is within (22-23] hours, the total quenching time T1 equals 66s when the turnaround time is within (23-24] hours, and the total quenching time T1 equals 68s when the turnaround time is within (24-30] hours.

5. The method for wet quenching of coke ovens as claimed in claim 2, wherein in step S3, the low pressure spraying time is T1, the medium pressure spraying time is T2, the high pressure spraying time is T3, the total quenching time T1 is T1+ T2+ T3, and the T1 and/or the T2 and/or the T3 are adjusted according to the turnaround time of the coke oven.

6. The method of coke oven wet quenching according to claim 5, wherein when the turnaround time is within [19,20] hours, the t1 is 14s, the t2 is 24s, the t3 is 20 s; when the turnover time is within (20-21] hours, the t1 is 15s, the t2 is 24s, the t3 is 21s, when the turnover time is within (21-22] hours, the t1 is 15s, the t2 is 24s, and the t3 is 22s, when the turnover time is within (22-23] hours, the t1 is 16s, the t2 is 24s, and the t3 is 23s, when the turnover time is within (23-24] hours, the t1 is 17s, the t2 is 25s, and the t3 is 24s, and when the turnover time is within (24-30] hours, the t1 is 18s, the t2 is 26s, and the t3 is 24 s.

7. The method of coke oven wet quenching according to claim 2, wherein when the turnaround time is within [19,20] hours, the valve position opening of the low pressure spray is 23%, the valve position opening of the medium pressure spray is 54%, and the valve position opening of the high pressure spray is 81%; when the turnaround time is within (20-21] hours, the valve position opening degree of the low-pressure spray is 23%, the valve position opening degree of the medium-pressure spray is 54%, the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (21-22] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (22-23] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, the valve position opening degree of the high-pressure spray is 82%, when the turnaround time is within (23-24] hours, the valve position opening degree of the low-pressure spray is 25%, and the valve position opening degree of the medium-pressure spray is 56%, the valve position opening degree of the high-pressure spraying is 82%; when the turnaround time is within (24-30] hours, the valve position opening of the low pressure spray is 25%, the valve position opening of the medium pressure spray is 57%, and the valve position opening of the high pressure spray is 82%.

8. The method for wet quenching of coke oven as claimed in claim 2, wherein in step S1, when the turnaround time is within [19,20] hours, the daily output hole number is 132-; when the turnover time is within (20-21] hours, the number of the holes of the daily yield is 126-.

9. The method for wet quenching of coke ovens as claimed in any one of claims 1 to 8, wherein in step S4, the draining time T2 is more than or equal to 1 min.

10. The coke oven wet quenching method of any one of claims 1 to 8, further comprising, after the step S4: detecting whether red coke exists in the coke, measuring moisture and particle size of the coke, and returning to the step S2 or the step S3 to adjust the quenching water temperature and the total quenching time T1 accordingly.

Technical Field

The invention relates to the technical field of coke quenching of coke ovens, in particular to a wet quenching method for a coke oven.

Background

After the coal is refined into coke in the coking chamber, the temperature of the red coke is about 1000 ℃, in order to avoid burning loss of the coke and facilitate storage and transportation, the red coke must be cooled and extinguished, and the red coke is extinguished completely, which is beneficial to prolonging the service life of the belt. The quenching method is generally divided into dry quenching and wet quenching. The dry quenching is a method for cooling the red coke by adopting inert gas, and the sensible heat of the red coke is absorbed by the inert gas and then flows through a dry quenching boiler for heat exchange to generate steam for power generation; wet quenching, also commonly referred to as water quenching, is the quenching of red coke to below 300 ℃ by spraying with water, with the resultant water vapor being vented to the atmosphere. During wet quenching, the accuracy of the process control level can directly determine the average water content, the moisture stability and the coke size fraction of the coke. In the blast furnace smelting process, the higher the moisture content of the coke is, the more heat is taken away by the steam, the more the coke is consumed, and the production cost is increased; and the fluctuation of the moisture of the coke also causes the fluctuation of the weight of the coke entering the furnace, thereby causing the fluctuation of the temperature of the hearth and being not beneficial to the stability of the furnace condition of the blast furnace. Moreover, the small fraction of coke entering the blast furnace is too high, which causes poor air permeability of the material column and is not beneficial to the stable operation of the blast furnace.

In addition, the service life of the dry quenching furnace refractory is generally 18-24 months, and the dry quenching furnace refractory needs to be periodically repaired and replaced in an annual way, and wet quenching is generally needed in the annual repair period (generally 25-40 days) to ensure the normal production of the coke furnace. Accordingly, there is a need for a wet quenching method that provides precise control of coke moisture content, moisture stability, and coke size fraction.

Disclosure of Invention

The invention aims to provide a coke oven wet quenching method, which can reduce the water content of coke, stabilize the water content of the coke, improve the particle size fraction of the coke, is beneficial to prolonging the service life of a coke conveying belt, ensures the stable and efficient operation of a blast furnace and reduces the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method of wet quenching a coke oven, comprising:

step S1, determining the daily output and turnover time of coke oven production according to the coke using requirement of the blast furnace;

step S2, setting the temperature of quenching water sprayed by a high-level water tank of a quenching tower according to the daily output and the turnover time, and adjusting the supplement amount of cooling water for quenching, wherein the longer the turnover time of the coke oven is, the lower the temperature of the set quenching water is;

s3, setting total coke quenching time T1, adjusting valve position opening of a water valve, starting spraying coke quenching, and sequentially and respectively carrying out low-pressure spraying, medium-pressure spraying and high-pressure spraying, wherein the longer the turnover time of the coke oven is, the longer the total coke quenching time T1 is;

and S4, draining the sprayed water-quenched coke, setting draining time T2, and uniformly placing the drained coke on a coke drying table for airing.

In a preferred embodiment of the present invention, in step S2, the interval range of the turnaround time is divided into six time periods, which are [19,20] hours, (20-21] hours, (21-22] hours, (22-23] hours, (23-24] hours, and (24-30) hours, respectively.

As a preferred embodiment of the present invention, in the step S2, when the turnaround time is within [19,20] hours, the quenching (or spraying, hereinafter the same) water temperature is 60 ℃ ± 0.5 ℃; the quenching water temperature is 59 ℃ + -0.5 ℃ when the turnaround time is within (20-21] hours, 58 ℃ + -0.5 ℃ when the turnaround time is within (21-22] hours, 57 ℃ + -0.5 ℃ when the turnaround time is within (22-23] hours, 56 ℃ + -0.5 ℃ when the turnaround time is within (23-24] hours, and 55 ℃ + -0.5 ℃ when the turnaround time is within (24-30] hours.

As a preferred embodiment of the present invention, in the step S3, when the turnaround time is within [19,20] hours, the total quenching time T1 is equal to 58S; the total quenching time T1 equals 60s when the turnaround time is within (20-21] hours, the total quenching time T1 equals 61s when the turnaround time is within (21-22] hours, the total quenching time T1 equals 63s when the turnaround time is within (22-23] hours, the total quenching time T1 equals 66s when the turnaround time is within (23-24] hours, and the total quenching time T1 equals 68s when the turnaround time is within (24-30] hours.

As a preferred embodiment of the present invention, in the step S3, the low pressure spraying time is T1, the medium pressure spraying time is T2, the high pressure spraying time is T3, the total quenching time T1 is T1+ T2+ T3, and the T1 and/or the T2 and/or the T3 are/is adjusted according to the turnover time of the coke.

As a preferred embodiment of the present invention, when the turnaround time is within [19,20] hours, the t1 is 14s, the t2 is 24s, the t3 is 20 s; when the turnover time is within (20-21] hours, the t1 is 15s, the t2 is 24s, the t3 is 21s, when the turnover time is within (21-22] hours, the t1 is 15s, the t2 is 24s, and the t3 is 22s, when the turnover time is within (22-23] hours, the t1 is 16s, the t2 is 24s, and the t3 is 23s, when the turnover time is within (23-24] hours, the t1 is 17s, the t2 is 25s, and the t3 is 24s, and when the turnover time is within (24-30] hours, the t1 is 18s, the t2 is 26s, and the t3 is 24 s.

As a preferred embodiment of the present invention, when the turnaround time is within [19,20] hours, the valve position opening degree of the low-pressure shower is 23%, the valve position opening degree of the medium-pressure shower is 54%, and the valve position opening degree of the high-pressure shower is 81%; when the turnaround time is within (20-21] hours, the valve position opening degree of the low-pressure spray is 23%, the valve position opening degree of the medium-pressure spray is 54%, the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (21-22] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (22-23] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, the valve position opening degree of the high-pressure spray is 82%, when the turnaround time is within (23-24] hours, the valve position opening degree of the low-pressure spray is 25%, and the valve position opening degree of the medium-pressure spray is 56%, the valve position opening degree of the high-pressure spraying is 82%; when the turnaround time is within (24-30] hours, the valve position opening of the low pressure spray is 25%, the valve position opening of the medium pressure spray is 57%, and the valve position opening of the high pressure spray is 82%.

As a preferred embodiment of the present invention, in the step S1, when the turnaround time is within [19,20] hours, the number of wells for the daily production is 132-; when the turnover time is within (20-21] hours, the number of the holes of the daily yield is 126-.

As a preferred embodiment of the present invention, in the step S4, the draining time T2 is 1min or more.

As a preferred embodiment of the present invention, after the step S4, the method further comprises: detecting whether red coke exists in the coke, measuring moisture and particle size of the coke, and returning to the step S2 or the step S3 to adjust the quenching water temperature and the total quenching time T1 accordingly.

The invention has the beneficial effects that: according to the coke oven wet quenching method provided by the invention, the temperature of quenching water sprayed by a high-level water tank of a quenching tower is set according to the daily yield and the turnover time of the coke oven, and the temperature of the quenching water is accurately controlled by adjusting the flow of supplementary cooling water; the longer the turnover time is, the lower the correspondingly set quenching water temperature is, so that the red coke can be fully quenched, and the moisture of the coke after quenching can be stably controlled; successively carry out the low pressure when spraying the quenching and spray respectively, the middling pressure sprays and spray with the high pressure, instantaneous flow control through different pressure that sprays plays different quenching effects, red burnt in the carriage of quenching carries out the successive layer and puts out thoroughly, up to coke transportation carriage bottom, the red burnt of both guaranteeing quenching carriage bottom puts out thoroughly completely, the stable control coke moisture mean value, and coke moisture fluctuation is little, also can guarantee that the granularity of coke is even, be favorable to improving the life of fortune burnt belt, guarantee the stability of blast furnace, high-efficient operation, and the production cost is reduced.

Drawings

FIG. 1 is a schematic flow chart of a method for wet quenching coke oven provided by the embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured 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 only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1, an embodiment of the present invention provides a method for wet quenching of a coke oven, including the following steps:

step S1, determining the daily output and turnover time of the coke oven according to the coke using requirement of the blast furnace;

step S2, adjusting the supplement amount of cooling water for quenching according to daily output and turnover time to set the quenching water temperature sprayed by a high-level water tank of a quenching tower, wherein the longer the turnover time is, the lower the set quenching water temperature is;

in this step S2, the quenching water temperature is set according to the daily output of coke and the turnaround time, and the longer the turnaround time, the lower the set quenching water temperature is, and the replenishment amount of cooling water is adjusted to ensure that the quenching water temperature reaches the required set value accurately before quenching is started. In the process of wet quenching, after the quenching water absorbs the heat of red coke, part of the quenching water is evaporated to enter the atmosphere, the total amount of the quenching water is gradually reduced, and the water temperature is gradually increased, so that cooling water needs to be continuously supplemented, and the quenching effect is ensured. Under different turnover time conditions, the heat carried by the red coke is different. The longer the coke turnover time, the more sufficient the red coke carries heat and the more difficult it is to quench it, so the correspondingly lower the quench water temperature is required. According to the turnover time of the coke oven, the supplement amount of cooling water is adjusted, the water temperature of the coke quenching water of the high-level water tank is ensured to be in a set control range, red coke can be fully quenched, and the moisture of the coke after quenching is also stably controlled.

S3, setting the total coke quenching time T1, adjusting the opening degree of a water valve, starting spraying coke quenching, and sequentially and respectively carrying out low-pressure spraying, medium-pressure spraying and high-pressure spraying, wherein the longer the turnover time of coke is, the longer the total coke quenching time T1 is;

the coke oven has different thermal properties of the obtained mature coke under different turnover time conditions. Corresponding wet quenching process parameters are different to realize that the moisture of the coke is stable at a low level, no red coke exists and the granularity is uniform. If the valve position opening degree (instantaneous flow) of a water valve is too large during quenching spraying and the quenching time is too long, the coke moisture is easily too high, otherwise, the red coke cannot be completely quenched within a limited time; meanwhile, the higher the water pressure (the larger the valve position opening), the stronger the water column penetrating power is, the more easily the red coke at the bottom of the coke quenching carriage is quenched, but the coke is also easily crushed. In the embodiment, low-pressure spraying, medium-pressure spraying and high-pressure spraying are sequentially and respectively carried out, different quenching effects are achieved through instantaneous flow adjustment of different spraying pressures, and red coke in a quenching carriage can be quenched layer by layer until the red coke reaches the bottom of the quenching carriage; the method can ensure that the red coke at the bottom of the coke quenching carriage is completely quenched, stabilize the moisture of the coke and ensure the uniform granularity of the coke.

And S4, draining the sprayed water-quenched coke, setting the draining time to be T2, and uniformly placing the drained coke on a coke drying table for airing. Preferably, after the step S4, the method further includes: and observing whether the coke has red coke, measuring the moisture and the granularity of the coke, and correspondingly adjusting the temperature of the cooling water and/or the total quenching time T1 according to the observed quenching condition of the coke, the actually measured moisture and granularity of the coke and other numerical values to further optimize the wet quenching method of the coke oven. In this embodiment, the draining time T2 needs to be 1min or more, and the water content of the coke is further reduced by draining.

According to the coke oven wet quenching method provided by the embodiment of the invention, the coke quenching water temperature sprayed by the high-position water tank of the coke quenching tower is set according to the daily yield and turnover time of the coke oven, and the coke quenching temperature is accurately controlled by continuously supplementing cooling water; the longer the turnover time is, the lower the correspondingly set quenching water temperature is, so that the red coke can be fully quenched, and the moisture of the coke after quenching can be stably controlled; the low pressure is successively carried out when spraying the quenching coke, the middling pressure sprays and the high pressure sprays respectively, instantaneous flow through different pressure that sprays adjusts and plays different quenching effects, carry out the successive layer to the red burnt in the quenching coke carriage and put out thoroughly, until quenching coke carriage bottom, both guaranteed that the red burnt of quenching coke carriage bottom puts out thoroughly completely, the stable control coke moisture mean value, and coke moisture fluctuation is little, also can guarantee that the granularity of coke is even, be favorable to improving the life of fortune burnt belt, guarantee the stability of blast furnace, high-efficient operation, reduction in production cost.

Further, in step S2, the interval range of the turnover time is divided into six time periods, namely [19,20] hours, (20-21] hours, (21-22] hours, (22-23] hours, (23-24] hours and (24-30] hours). the turnover time which is common in the coke oven is divided into the time periods, so that the temperature adjustment of the coke quenching water and the total coke quenching time T1 can be conveniently carried out according to the time period of the turnover time.

Further, in step S2, when the turnaround time is within [19,20] hours, the quenching water temperature is 60 ℃ + -0.5 ℃; the coke quenching water temperature is 59 +/-0.5 ℃ when the turnover time is within (20-21] hours, is 58 +/-0.5 ℃ when the turnover time is within (21-22] hours, is 57 +/-0.5 ℃ when the turnover time is within (22-23] hours, is 56 +/-0.5 ℃ when the turnover time is within (23-24] hours, and is 55 +/-0.5 ℃ when the turnover time is within (24-30] hours.

Further, in step S3, when the turnaround time is within [19,20] hours, the total quenching time T1 is equal to 58S; the total quenching time T1 is equal to 60s when the turnover time is within (20-21] hours, the total quenching time T1 is equal to 61s when the turnover time is within (21-22] hours, the total quenching time T1 is equal to 63s when the turnover time is within (22-23] hours, the total quenching time T1 is equal to 66s when the turnover time is within (23-24] hours, and the total quenching time T1 is equal to 68s when the turnover time is within (24-30] hours.

Further, in step S3, the low-pressure spraying time is T1, the medium-pressure spraying time is T2, the high-pressure spraying time is T3, T1 is T1+ T2+ T3, T1 and/or T2 and/or T3 are adjusted according to the turnover time of the coke, and the total quenching time T1 is ensured to increase along with the increase of the turnover time. Further, when the turnaround time is within [19,20] hours, t1 is 14s, t2 is 24s, t3 is 20 s; when the turnover time is within (20-21] hours, t1 is 15s, t2 is 24s, t3 is 21s, when the turnover time is within (21-22] hours, t1 is 15s, t2 is 24s, t3 is 22s, when the turnover time is within (22-23] hours, t1 is 16s, t2 is 24s, t3 is 23s, when the turnover time is within (23-24] hours, t1 is 17s, t2 is 25s, t3 is 24s, when the turnover time is within (24-30] hours, t1 is 18s, t2 is 26s, t3 is 24 s. the turnover time is different, the heat carried by the corresponding red coke is different, the low-pressure spraying time, the medium-pressure spraying time and the high-pressure spraying time are accurately set, the red coke in a coke quenching car can be quenched layer by layer, the red coke is permeated to the bottom of the car, the coke is quenched in three spraying times, the longest spraying time is t2, medium-pressure spraying can perform mild and relatively long-time coke quenching, so that the coke is prevented from being cracked, and the effect of extinguishing red coke is better.

Further, when the turnover time is within [19,20] hours, the valve position opening degree of the low-pressure spray is 23%, the valve position opening degree of the medium-pressure spray is 54%, and the valve position opening degree of the high-pressure spray is 81%; when the turnaround time is within (20-21] hours, the valve position opening degree of the low-pressure spray is 23%, the valve position opening degree of the medium-pressure spray is 54%, the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (21-22] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, and the valve position opening degree of the high-pressure spray is 81%, when the turnaround time is within (22-23] hours, the valve position opening degree of the low-pressure spray is 24%, the valve position opening degree of the medium-pressure spray is 55%, and the valve position opening degree of the high-pressure spray is 82%, when the turnaround time is within (23-24] hours, the valve position opening degree of the low-pressure spray is 25%, the valve position opening degree of the medium-pressure spray is 56%, and the valve position opening degree of the high-pressure spray is 82%, and when the turnaround time is within (24-30] hours, the valve position opening degree of the low-pressure spray is 25%, the valve position opening degree of the medium-pressure spray is 57%, and the valve position opening degree of the high-pressure spray is 82%. Through the regulating value of the valve position opening, the pressure values of low-pressure spraying, medium-pressure spraying and high-pressure spraying can be accurately controlled, so that the pressure of cooling water can penetrate to the bottom of a coke quenching carriage, and the occupation ratio of small coke particle size fraction cannot be increased due to overlarge pressure.

Further, in step S1, when the turnaround time is within [19,20] hours, the number of wells for daily production is 132-; the number of holes of the daily output is 126-.

Example two

In the embodiment of the invention, a wet quenching method adopted during the annual repair of a 3# dry quenching furnace in a certain steel mill is taken as an example, and the wet quenching method in the first embodiment is further described in detail. During the annual repair period of the 3# dry quenching furnace of the steel mill, the 8# blast furnace is synchronously repaired, so the coke demand is reduced, and the turnover time of 6# and 7# coke ovens (6m coke ovens) is prolonged to 28 hours.

Adjusting the coke quenching cooling water supplement amount according to the turnover time and the daily planned coke hole number of the 6# and 7# coke ovens, and ensuring that the temperature of the spraying quenching water of the high-position water tank of the coke quenching tower is controlled to be 55 +/-0.5 ℃, namely the temperature of the spraying water for quenching is 55 +/-0.5 ℃; meanwhile, in the coke quenching process, the valve position opening degree of low-pressure spraying is set to be 25%, and the spraying time is set to be 18 s; the valve position opening degree of medium-pressure spraying is 57%, and the spraying time is 26 s; and (4) spraying for 24s with the valve position opening of the high-pressure spraying being 82%. And (5) carrying out draining and airing on the sprayed water coke quenching, and carrying out measurement. The measured data comprise coke moisture, a proportion of particle size less than 25mm, an average particle size fraction, a crushing strength M40 proportion, a coke post-reaction strength CSR and the like. It can be found by statistics that after the wet quenching method of the embodiment is used, the moisture mean value of the coke is reduced to 3.20% from 4.70% during the previous annual repair of the 3# dry quenching furnace, the moisture content of the coke is more stable, and the standard deviation of the moisture content is reduced to 0.21 from 1.46 during the previous annual repair of the 3# dry quenching furnace. In addition, in the case of deterioration of both coke M40 and CSR, the average particle size fraction of the coke increased from 52.39mm to 57.95mm during the previous annual repair period of No. 3 dry quenching furnace, wherein the particle size of less than 25mm decreased from 8.09% to 3.13%, the fine particle fraction of the coke decreased, and the particle size was more uniform.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.