阅读说明：本技术 一种半干法熄焦系统 (Semi-dry coke quenching system ) 是由 张宇 袁博 党增琦 张明 刘洁 刘建平 贺文彦 王金涛 任志荣 张国文 付锦东 于 2019-11-28 设计创作，主要内容包括：本发明提供了一种半干法熄焦系统,由浇熄物料进料端至出料端包括进料输送结构、第一冷却结构、第二冷却结构、出料输送结构。进料输送结构包括刮板输送机及推焦车。第一冷却结构包括水封槽,水封槽的中部设有若干个间隔设置的水平隔板,水平隔板上放置有浇熄物料。水封槽内且位于水平隔板的上方设有喷淋装置,喷淋装置用于对水平隔板上的浇熄物料进行第一次降温。第二冷却结构包括斜向上设置的斜溜槽,斜溜槽上设有第一次冷却的浇熄物料,斜溜槽上罩设有密封的水管冷却结构,水管冷却结构用于对浇熄物料进行第二次降温。出料输送结构包括密封出料系统及转载皮带输送机。本发明的半干法熄焦系统有结构简单、安全可靠、环保的优点。(The invention provides a semi-dry coke quenching system which comprises a feeding conveying structure, a first cooling structure, a second cooling structure and a discharging conveying structure from a feeding end to a discharging end of a quenching material. The feeding and conveying structure comprises a scraper conveyor and a coke pusher. The first cooling structure comprises a water seal tank, the middle of the water seal tank is provided with a plurality of horizontal partition plates arranged at intervals, and the horizontal partition plates are provided with quenching materials. And a spraying device is arranged in the water seal tank and above the horizontal partition plate, and the spraying device is used for cooling the quenching material on the horizontal partition plate for the first time. The second cooling structure comprises an inclined chute which is obliquely arranged upwards, the inclined chute is provided with a first-time cooled pouring and extinguishing material, the inclined chute is covered with a sealed water pipe cooling structure, and the water pipe cooling structure is used for cooling the pouring and extinguishing material for the second time. The discharging conveying structure comprises a sealed discharging system and a transshipment belt conveyor. The semi-dry coke quenching system has the advantages of simple structure, safety, reliability and environmental protection.)

1. A semi-dry coke quenching system is characterized in that: the device comprises a feeding conveying structure, a first cooling structure, a second cooling structure and a discharging conveying structure from a feeding end to a discharging end of a quenching material;

the feeding and conveying structure comprises a scraper conveyor and a coke pusher, and the scraper conveyor and the coke pusher convey the quenched materials to the front end of the first cooling structure;

the first cooling structure comprises a water seal tank, a plurality of horizontal partition plates arranged at intervals are arranged in the middle of the water seal tank, quenching materials are placed on the horizontal partition plates, a spraying device is arranged in the water seal tank and above the horizontal partition plates, and the spraying device is used for carrying out first cooling on the quenching materials on the horizontal partition plates;

the second cooling structure comprises an inclined chute which is arranged obliquely upwards, the inclined chute is provided with a quenching material which is cooled for the first time, a sealed water pipe cooling structure is covered on the inclined chute, and the water pipe cooling structure is used for cooling the quenching material for the second time;

the inclined chute conveys the quenched pouring materials subjected to the second cooling to a discharging conveying structure, the discharging conveying structure comprises a sealed discharging system and a transshipment belt conveyor, and the cooled quenched pouring materials are output by the sealed discharging system and the transshipment belt conveyor.

2. A semi-dry quenching system as claimed in claim 1, wherein: the second cooling structure further comprises a safety water seal, the safety water seal is located on the upper portion of the water pipe cooling structure, and the inlet end of the safety water seal is communicated with the first cooling structure and the second cooling structure.

3. A semi-dry quenching system as claimed in claim 1, wherein: the water seal tank and the inclined chute are both steel structures.

4. A semi-dry quenching system as claimed in claim 1, wherein: the semi-dry quenching system also comprises a control system, and the control system comprises an electric control system and a hydraulic system.

5. A semi-dry quenching system as claimed in claim 1, wherein: the tail end of the first cooling structure and the tail end of the second cooling structure are both provided with a temperature sensor and an alarm, the temperature sensor is used for measuring the temperature of the quenching material, and the alarm gives an alarm when the temperature measured by the temperature sensor exceeds the upper limit.

6. The semi-dry quenching system as claimed in any one of claims 1 to 5, wherein: the method for cooling and pouring quenched materials by using the semi-dry quenching system comprises the following steps of:

the method comprises the following steps: loading of quenching material in the first cooling structure: conveying the cast-out material to a horizontal partition plate at the foremost end of the first cooling structure through the material conveying structure, and moving the horizontal partition plate at the foremost end to the tail end of the first cooling structure; meanwhile, the empty horizontal partition plate without the quenching material is moved to the foremost end of the first cooling structure to load the quenching material;

step two: the first cooling of the quenching material in the first cooling structure: when the horizontal partition plate moves, the spray head on the spray device sprays water to the quenching material on the horizontal partition plate, and the quenching material is cooled for the first time;

step three: unloading of the quenching materials in the first cooling structure and loading of the quenching materials in the second cooling structure: the horizontal partition plate which is moved to the tail end of the first cooling structure dumps the quenched material to the inclined chute;

step four: and (3) quenching the second cooling of the material in the second cooling structure: moving the inclined chute, moving the quenching material from the front end to the tail end of the inclined chute, and performing secondary cooling through a water pipe cooling structure in the moving process of the quenching material;

step five: discharging the quenched materials after the second cooling: the pouring and extinguishing materials moving to the tail end of the inclined chute enter the sealed discharging system and are conveyed out to a coal bunker for storage through a transfer belt conveyor.

7. A semi-dry quenching system as claimed in claim 6, wherein: in the first step, the thickness of the cast-out material on the horizontal partition plate is 3-10 cm.

8. A semi-dry quenching system as claimed in claim 6, wherein: in the second step, when the temperature is reduced for the first time, the water spraying amount of the spraying device is 0.1-0.5 time of the weight of the quenching material poured on the horizontal partition plate.

9. A semi-dry quenching system as claimed in claim 6, wherein: in the second step, the temperature of the discharged quenching materials after the first temperature reduction is 300-400 ℃, and in the fourth step, the temperature of the discharged quenching materials after the second temperature reduction is 50-120 ℃.

Technical Field

The invention relates to the technical field of coking and coking equipment, in particular to a semi-dry coke quenching system.

Background

Coal is used for modern industries, namely heavy industry and light industry; the method plays an important role in energy industry, metallurgical industry, chemical industry, mechanical industry, light textile industry, food industry and transportation industry.

At the end of coking, the temperature of the quenched material is generally 950-1100 ℃, and in order to facilitate transportation and storage, the red hot quenched material needs to be cooled to below 120 ℃, and the process is called quenching. The traditional coke quenching technology comprises a dry coke quenching technology and a water immersion type coke quenching technology, wherein the dry coke quenching technology is used for cooling a quenched material by taking circulating gas as a heat carrier, and the water immersion type coke quenching technology is used for cooling the quenched material by completely immersing the quenched material into water.

The dry quenching technology is generally a vertical quenching system, which transfers heat exchange quantity between the ascending heat exchange gas and the descending high-temperature quenched material in the butt joint process. The heat exchange mode has larger gas resistance and higher requirement on high-temperature quenching materials, and is only suitable for the quenching materials with good quenching strength, large granularity and low powder content, namely the mass proportion of the particles with the particle size of more than 25mm is more than 95 percent, and the heat exchange mode is not suitable for the quenching materials with small granularity. Meanwhile, the coke dry quenching equipment is huge, the investment cost is high, and the coke burning loss and harmful gas emission of the coke dry quenching are also technical problems which cannot be solved at present; and the furnace temperature of the normal-pressure intermittent gasification technology is not easy to control, the quality of the produced gas is low, and the equipment abrasion is large.

Therefore, there is a need for improvements in existing quenching systems and methods to increase the cooling efficiency of the quenched material and reduce the harm to the environment and operators.

Disclosure of Invention

The invention provides a semi-dry coke quenching system which has the advantages of good sealing property, attractive appearance, simple structure, convenience in construction, safety, reliability and environmental protection, and aims to solve the problems of high coke quenching cost, low efficiency, serious environmental pollution and the like in the dry coke quenching and wet coke quenching.

The technical scheme for realizing the purpose of the invention is as follows: a semi-dry coke quenching system comprises a feeding conveying structure, a first cooling structure, a second cooling structure and a discharging conveying structure from a feeding end to a discharging end of a quenching material.

The feeding and conveying structure comprises a scraper conveyor and a coke pusher, and the scraper conveyor and the coke pusher convey the quenched materials to the front end of the first cooling structure.

The first cooling structure comprises a water seal tank, the middle of the water seal tank is provided with a plurality of horizontal partition plates arranged at intervals, and the horizontal partition plates are provided with quenching materials. And a spraying device is arranged in the water seal tank and above the horizontal partition plate, and the spraying device is used for cooling the quenching material on the horizontal partition plate for the first time.

The second cooling structure comprises an inclined chute which is obliquely arranged upwards, the inclined chute is provided with a first-time cooled pouring and extinguishing material, the inclined chute is covered with a sealed water pipe cooling structure, and the water pipe cooling structure is used for cooling the pouring and extinguishing material for the second time.

The inclined chute conveys the quenched pouring materials after the second cooling to a discharging conveying structure, the discharging conveying structure comprises a sealed discharging system and a transshipment belt conveyor, and the cooled quenched pouring materials are output by the sealed discharging system and the transshipment belt conveyor.

The temperature index of the quenched material after cooling can be ensured by cooling the quenched material twice; the two times of coke quenching are carried out under the sealing condition, thereby avoiding the environmental pollution caused by the release of CO, SO2, dust and other harmful gases into the air in the coke quenching process; the semi-dry method is used for quenching coke, so that the water content of the quenched material after quenching coke is ensured to be within 14% under the condition of ensuring the temperature of the quenched material after quenching coke, and the operation process that the quenched material after quenching coke by a soaking method needs to be dried in the later period is avoided; and the damage of dry quenching to the equipment is also avoided.

As a further improvement of the invention, the second cooling structure also comprises a safety water seal, the safety water seal is positioned at the upper part of the water pipe cooling structure, the inlet end of the safety water seal is communicated with the first cooling structure and the second cooling structure, and the arrangement of the safety water seal can release gas pressure through the safety water seal from high-temperature water-coal gas generated and gathered in the spraying process in the water seal tank, so that the safety pressure relief is realized, and the unsafe operation of the equipment is avoided.

As a further improvement of the invention, because the quenching material has higher temperature of 950-1100 ℃, in order to avoid thermal damage to the water seal tank and the inclined chute caused by the quenching material, the water seal tank and the inclined chute are both steel structures, and the water seal tank and the inclined chute of the steel structures have high temperature resistance, are not easy to generate thermal deformation and have longer service life.

As a further improvement of the invention, in order to increase the automation degree of the semi-dry coke quenching system and realize the accurate control of coke quenching operation, the semi-dry coke quenching system also comprises a control system, and the control system comprises an electric control system and a hydraulic system.

As a further improvement of the invention, the tail end of the first cooling structure and the tail end of the second cooling structure are both provided with a temperature sensor and an alarm, the temperature sensors are used for measuring the temperature of the quenching material, and the alarm gives an alarm when the temperature measured by the temperature sensors exceeds the upper limit. The arrangement of the temperature sensor and the alarm can ensure the quenching temperature of the quenched material, ensure that the temperature of the quenched material is less than 120 ℃ after the first cooling and the second cooling, and improve the quenching efficiency.

As a further improvement of the invention, the method for cooling the quenched material by the semi-dry quenching system comprises the following steps:

the method comprises the following steps: loading of quenching material in the first cooling structure: conveying the cast-out material to a horizontal partition plate at the foremost end of the first cooling structure through the material conveying structure, and moving the horizontal partition plate at the foremost end to the tail end of the first cooling structure; meanwhile, the empty horizontal partition plate without the quenching material is moved to the foremost end of the first cooling structure to load the quenching material;

step two: the first cooling of the quenching material in the first cooling structure: when the horizontal partition plate moves, the spray head on the spray device sprays water to the quenching material on the horizontal partition plate, and the quenching material is cooled for the first time;

step three: unloading of the quenching materials in the first cooling structure and loading of the quenching materials in the second cooling structure: the horizontal partition plate which is moved to the tail end of the first cooling structure dumps the quenched material to the inclined chute;

step four: and (3) quenching the second cooling of the material in the second cooling structure: moving the inclined chute, moving the quenching material from the front end to the tail end of the inclined chute, and performing secondary cooling through a water pipe cooling structure in the moving process of the quenching material;

step five: discharging the quenched materials after the second cooling: the pouring and extinguishing materials moving to the tail end of the inclined chute enter the sealed discharging system and are conveyed out to a coal bunker for storage through a transfer belt conveyor.

In a preferred embodiment of the method for cooling the quenching material by using the semi-dry quenching system, in the step one, the thickness of the quenching material on the horizontal partition plate is 3-10 cm, when the quenching material is smaller than 10cm, the dissipation of heat in the quenching material can be ensured, the effect of primary cooling is ensured, meanwhile, the thickness of the quenching material is larger than 3cm, and the quenching operation efficiency can be improved.

In a preferred embodiment of the method for cooling the quenched material by the semi-dry quenching system, when the quenched material is cooled, the quenched material is cooled by adding water through first cooling, and the moisture in the quenched material is increased; and the secondary cooling is mainly carried out through a water pipe cooling structure, and the moisture in the cast-out material is basically unchanged. The temperature of the quenching material is poured after the first cooling is ensured, meanwhile, the quenching material is enabled to have appropriate moisture (about 2.0-14%) to ensure the direct application in the later stage of the quenching material, in the second step, when the first cooling is carried out, the water spraying amount of the spraying device is 0.1-0.5 time of the weight of the quenching material poured on the horizontal partition plate, 0.1-0.5 time of the water amount is used, after the first cooling is carried out, the moisture in the quenching material can be kept in 2.0-14%, and the process that water is added to increase the moisture or is dried to reduce the moisture when the later stage quenching material is applied is avoided.

In a preferred embodiment of the method for cooling the quenching material by the semi-dry quenching system, in the second step, the temperature of the quenching material discharged after the first temperature reduction is 300-400 ℃, and in the fourth step, the temperature of the quenching material discharged after the second temperature reduction is 50-120 ℃.

Compared with the prior art, the beneficial effects of the invention are as follows:

1. the quenching material is cooled twice, so that the temperature index of the quenched material after cooling can be ensured to reach below 250 ℃;

2. the two coke quenching overproductions are carried out under the sealed condition, which can avoid CO and SO in the coke quenching process₂Harmful gases such as dust and the like are released into the air to cause environmental pollution;

3. in the semi-dry method for quenching coke, under the condition of ensuring the temperature of the quenched material, the water content of the quenched material is ensured to be within 2.0-14%, the operation process that the quenched material quenched by a soaking method needs to be dried in the later period is avoided, and the energy consumption is reduced; the damage of dry quenching to the equipment is also avoided, the safe operation of the equipment is ensured, and the service life of the equipment is prolonged.

Drawings

FIG. 1 is a schematic diagram of a semi-dry quenching system according to the present invention;

FIG. 2 is a plan view of a semi-dry quenching system of the present invention;

FIG. 3 is a flow chart of a quenched material quenching process of the semi-dry quenching system of the present invention;

wherein, 1, a scraper conveyor; 2. a coke pusher; 3. water sealing the tank; 4. a spraying device; 5. an inclined chute; 6. a water pipe cooling structure; 7. sealing the discharging system; 8. a transfer belt conveyor; 9. safe water seal; 31. a horizontal partition.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.