阅读说明：本技术 一种高炉冲渣乏汽的消白系统 (White system that disappears of blast furnace towards sediment exhaust steam ) 是由 王波 孙照燕 温星 刘东升 樊统云 王飞 颜晓光 刘远征 于 2021-07-18 设计创作，主要内容包括：一种高炉冲渣乏汽的消白系统,属于高炉冲渣水乏汽消白技术领域。包括,渣沟、粒化塔、粒化塔出口水管路、搅笼、搅笼密封罩、乏汽管路、搅笼出口水管路、冷却塔、冲渣供水泵、冲渣供水管路、环保冷凝除湿消白装置、冷凝水收集管路、冷凝水箱、冷凝水加压泵、冷凝水输送管路。优点在于,解决了高炉冲渣乏汽产生量大和乏汽排放含湿量大、“烟囱雨”带来的腐蚀和“白色烟羽”,对环境产生污染,且造成水资源浪费等问题。(A white-removing system for blast furnace slag flushing exhaust steam belongs to the technical field of white-removing of blast furnace slag flushing water exhaust steam. The system comprises a slag runner, a granulating tower outlet water pipeline, a stirring cage sealing cover, a steam exhaust pipeline, a stirring cage outlet water pipeline, a cooling tower, a slag flushing water supply pump, a slag flushing water supply pipeline, an environment-friendly condensation dehumidifying and whitening device, a condensed water collecting pipeline, a condensed water tank, a condensed water pressurizing pump and a condensed water conveying pipeline. The method has the advantages of solving the problems of large generation amount of the waste steam generated by slag flushing of the blast furnace, large moisture content of the discharged waste steam, corrosion and white smoke plume caused by chimney rain, environmental pollution, water resource waste and the like.)

1. A white waste steam eliminating system for blast furnace slag flushing is characterized by comprising a slag runner (1), a granulation tower (2), an outlet water pipeline (3) of the granulation tower, a stirring cage (4), a stirring cage sealing cover (5), a waste steam pipeline (6), a stirring cage outlet water pipeline (7), a cooling tower (8), a slag flushing water supply pump (9), a slag flushing water supply pipeline (10), an environment-friendly condensation dehumidifying and white waste eliminating device (11), a condensed water collecting pipeline (12), a condensed water tank (13), a condensed water pressurizing pump (14) and a condensed water conveying pipeline (15); blast furnace slag is connected with a granulating tower (2) along a slag runner (1), the granulating tower (2) is connected with an inlet of an environment-friendly condensation, dehumidification and whitening device (11) through reducing, an outlet water pipeline (3) of the granulating tower is connected with a stirring cage (4), a stirring cage sealing cover (5) is arranged at the upper part of the stirring cage (4) and is connected with the environment-friendly condensation, dehumidification and whitening device (11) through a steam exhaust pipeline (6), and slag water of the stirring cage (4) is connected with an inlet of a cooling tower (8) through a stirring cage outlet water pipeline (7); the slag flushing water supply pump 9 is arranged on a slag flushing water supply pipeline 10 behind the cooling tower, a condensed water collecting pipeline (12) is connected with a water collecting tank at the bottom of an environment-friendly condensation, dehumidification and whitening device (11) and flows into a condensed water tank (13) through self gravity, a condensed water pressure pump (14) is arranged on a condensed water conveying pipeline (15) behind the condensed water tank (13), and the condensed water is conveyed to other water consumption points outside the system through the condensed water conveying pipeline (15) for secondary recycling; the low-temperature slag flushing water cooled by the cooling tower (8) is pressurized by a slag flushing water supply pump (9) and then is used for slag flushing of the slag runner (1) along a slag flushing water supply pipeline (10), and condensed water generated by the environment-friendly condensation, dehumidification and whitening device (11) is conveyed to a condensed water tank (13) along a condensed water collecting pipeline (12) and is subjected to pressure boosting by a condensed water pressurizing pump (14) and then conveyed to a plant area along a condensed water conveying pipeline (15) for comprehensive water treatment.

2. The system for eliminating the white waste steam of the blast furnace cinder flushing according to claim 1, wherein the cooling tower (8) cools the cinder water at 80-90 ℃ after cinder flushing to 40-50 ℃.

3. The system for eliminating the white content of the blast furnace flushing slag dead steam according to claim 1, characterized in that the environment-friendly condensation, dehumidification and white content elimination device (11) is a condensation, dehumidification and white content elimination device which completely utilizes the hot-pressing effect of the dead steam; the heat exchange fins made of metal materials with good heat conduction performance are arranged on the outer wall of the device, so that the heat dissipation surface area is increased, and the condensation and dehumidification effects are enhanced; the cyclone dewatering and flow divider is arranged inside the device, exhaust steam is guided to rotate and rise inside the device, the exhaust steam is dispersed to the outer side wall surface under the action of the flow divider, the exhaust steam stroke is increased, the heat and mass transfer effect inside the exhaust steam is enhanced, small condensed water droplets inside the chimney can be condensed into large droplets through mutual collision, and the large droplets are condensed and discharged along the inner wall of the cyclone dewatering device under the action of centrifugal force.

4. The system for eliminating the white waste steam of the blast furnace flushing slag of claim 1, wherein the system for eliminating the white waste steam of the flushing slag comprises the following steps:

the method comprises the following steps: enabling the 1480-1580 ℃ molten slag to enter a granulation tower (2) along a slag runner (1), and carrying out sufficient heat exchange with 40-50 ℃ low-temperature slag flushing water in the granulation tower (2) to raise the temperature to 80-90 ℃, wherein a large amount of saturated exhaust steam is generated in the slag flushing process;

step two: slag flushing water with the temperature of 80-90 ℃ at the outlet of the granulating tower enters the stirring cage (4) along the outlet water pipeline (3) of the granulating tower to carry out slag-water separation, and then enters the cooling tower (8) along the outlet water pipeline (7) of the stirring cage; the exhaust steam generated by the stirring cage is converged into an environment-friendly condensation, dehumidification and whitening device (11) through an exhaust steam pipeline (6);

step three: cooling the slag flushing water with higher temperature by a cooling tower (8), fully exchanging heat with the outside air, then cooling the water to 40-50 ℃, pressurizing by a slag flushing water supply pump 9, and then supplying slag for slag flushing of the slag runner (1) along a slag flushing water supply pipeline 10;

step four: a large amount of saturated exhaust steam at 80-90 ℃ is generated in the slag flushing process inside the granulation tower (2) and enters an environment-friendly condensation, dehumidification and white elimination device (11) above the granulation tower (2);

step five: and (3) condensing, cooling and dehumidifying the saturated exhaust steam at the temperature of 80-90 ℃ in an environment-friendly condensation, dehumidification and de-whitening device (11), and then exhausting the saturated exhaust steam into the atmosphere. Meanwhile, the condensed water flows into a liquid accumulation tank at the bottom of the device along the inner wall of the environment-friendly condensation, dehumidification and whitening device (11);

step six: the condensed water in the liquid collecting tank is conveyed to a condensed water tank (13) along a condensation recovery pipeline 12, and is conveyed to a plant area for comprehensive water treatment along a condensed water conveying pipeline (15) after being boosted by a condensed water booster pump (14).

Technical Field

The invention belongs to the technical field of blast furnace slag flushing water exhaust steam de-whitening, and particularly relates to a de-whitening system for blast furnace slag flushing exhaust steam, namely a de-whitening system for 'source dehumidification, condensation dehumidification and cyclone dehydration' of blast furnace slag flushing exhaust steam.

Background

At present, the blast furnace slag flushing of domestic steel and iron plants mainly adopts a slag flushing form, and a large amount of saturated exhaust steam is generated in the slag flushing process. Because the blast furnace slag flushing exhaust steam contains a large amount of emissions such as sulfate ions, chloride ions, slag wool and the like, the blast furnace slag flushing exhaust steam corrodes equipment such as a cast house shed, a traveling crane in front of the furnace, a slag discharging stranding cage and the like, influences the operation sight of each production post in front of the furnace and causes potential safety hazards. Meanwhile, as the exhaust steam has high emission temperature (80-90 ℃) and is in a saturated state, white smoke plume can be generated in the process of directly discharging the exhaust steam into the atmosphere through a chimney at the top of the granulation tower, the environment is polluted, and water resource waste is caused. The spraying cooling pipeline is arranged in the granulating tower to cool the exhaust steam, and the cooled exhaust steam is discharged through the chimney, so that the resistance of spraying equipment is too large, water mist is enriched at the upper part in the spraying tower to form a water seal phenomenon, the smooth discharge of the slag flushing exhaust steam is seriously influenced, and potential safety hazards are generated. The method has the advantages that the hot flue gas is directly added, the exhaust steam emission temperature is increased, the exhaust steam emission temperature is higher than the dew point temperature, the visual whitening effect can be achieved, the dehumidification purpose is difficult to achieve really, and the problem of water resource waste cannot be solved fundamentally.

Disclosure of Invention

The invention aims to provide a white elimination system of blast furnace slag flushing exhaust steam, which is used for source dehumidification, condensation dehumidification and rotational flow dehydration, and solves the problems of large blast furnace slag flushing exhaust steam generation amount, large exhaust steam emission moisture content, corrosion and white smoke plume caused by chimney rain, environmental pollution, water resource waste and the like.

The invention can reduce the generation of the slag flushing steam exhaust amount by reducing the water supply temperature of the slag flushing water; the moisture content of the exhaust steam can be effectively reduced by arranging the environment-friendly condensation, dehumidification and whitening device; through the dehydration of the cyclone dehydrator, liquid drops in the exhaust steam can be effectively discharged, and the aim of substantially eliminating white is fulfilled.

The invention mainly comprises a slag runner 1, a granulation tower 2, a granulation tower outlet water pipeline 3, a stirring cage 4, a stirring cage sealing cover 5, a steam exhaust pipeline 6, a stirring cage outlet water pipeline 7, a cooling tower 8, a slag flushing water supply pump 9, a slag flushing water supply pipeline 10, an environment-friendly condensation dehumidification and whitening device 11, a condensed water collecting pipeline 12, a condensed water tank 13, a condensed water pressurizing pump 14 and a condensed water conveying pipeline 15; blast furnace slag is connected with a granulating tower 2 along a slag runner 1, the granulating tower 2 is connected with an inlet of an environment-friendly condensation, dehumidification and whitening device 11 through reducing, an outlet water pipeline 3 of the granulating tower is connected with a stirring cage 4, a stirring cage sealing cover 5 is arranged on the upper part of the stirring cage 4 and is connected with the environment-friendly condensation, dehumidification and whitening device 11 through an exhaust steam pipeline 6, and slag water of the stirring cage 4 is connected with an inlet of a cooling tower 8 through an outlet water pipeline 7 of the stirring cage; a slag flushing water supply pump 9 is arranged on a slag flushing water supply pipeline 10 behind a cooling tower, a condensed water collecting pipeline 12 is connected with a water collecting tank at the bottom of an environment-friendly condensation, dehumidification and whitening device 11 and flows into a condensed water tank 13 through self gravity, a condensed water pressure pump 14 is arranged on a condensed water conveying pipeline 15 behind the condensed water tank 13, and the condensed water is conveyed to other water consumption points outside the system through the condensed water conveying pipeline 15 for secondary recycling; the low-temperature slag flushing water cooled by the cooling tower 8 is pressurized by a slag flushing water supply pump 9 and then is supplied to slag flushing of the slag runner 1 along a slag flushing water supply pipeline 10, and condensed water generated by the environment-friendly condensation, dehumidification and whitening device 11 is conveyed to a condensed water tank 13 along a condensed water collecting pipeline 12, is pressurized by a condensed water pressurizing pump 14 and then is conveyed to a plant area along a condensed water conveying pipeline 15 for comprehensive water treatment.

Further, the system is provided with a cooling tower 8, and the slag water with the temperature of 80-90 ℃ after slag flushing is cooled to 40-50 ℃.

Further, the environment-friendly condensation, dehumidification and whitening device 11 is a condensation, dehumidification and whitening device which can fully utilize the hot-pressing effect of exhaust gas. The heat exchange fins made of metal materials with good heat conduction performance are arranged on the outer wall of the device, so that the heat dissipation surface area is increased, and the condensation and dehumidification effects are enhanced; the cyclone dewatering and flow divider is arranged inside the device, exhaust steam is guided to rotate and rise inside the device, the exhaust steam is dispersed to the outer side wall surface under the action of the flow divider, the exhaust steam stroke is increased, the heat and mass transfer effect inside the exhaust steam is enhanced, small condensed water droplets inside the chimney can be condensed into large droplets through mutual collision, and the large droplets are condensed and discharged along the inner wall of the cyclone dewatering device under the action of centrifugal force.

Further, the manufacturing method of the whitening system for 'source dehumidification, condensation dehumidification and rotational flow dehydration' of the blast furnace slag flushing dead steam comprises the following steps:

the method comprises the following steps: the method comprises the following steps that 1480-1580 ℃ molten slag enters a granulation tower 2 along a slag runner 1, and fully exchanges heat with 40-50 ℃ low-temperature slag flushing water in the granulation tower 2 to raise the temperature to 80-90 ℃ so as to generate a large amount of saturated exhaust steam in the slag flushing process;

step two: slag flushing water with the temperature of 80-90 ℃ at the outlet of the granulating tower enters the stirring cage 4 along the outlet water pipeline 3 of the granulating tower to be subjected to slag-water separation, and then enters the cooling tower 8 along the outlet water pipeline 7 of the stirring cage; the exhaust steam generated by the stirring cage is converged into an environment-friendly condensation, dehumidification and whitening device 11 through an exhaust steam pipeline 6;

step three: cooling the slag flushing water with higher temperature by a cooling tower 8, fully exchanging heat with the outside air, then cooling the water to 40-50 ℃, pressurizing by a slag flushing water supply pump 9, and then flushing slag in the slag runner 1 along a slag flushing water supply pipeline 10;

step four: a large amount of saturated exhaust steam at the temperature of 80-90 ℃ is generated in the slag flushing process in the granulation tower 2 and enters an environment-friendly condensation, dehumidification and white elimination device 11 above the granulation tower 2;

step five: and condensing, cooling and dehumidifying the saturated exhaust steam at the temperature of 80-90 ℃ in an environment-friendly condensation and dehumidification and de-whitening device 11, and then discharging into the atmosphere. Meanwhile, the condensed water flows into a liquid accumulation tank at the bottom of the device along the inner wall of the environment-friendly condensation, dehumidification and whitening device 11;

step six: the condensed water in the liquid collecting tank is sent to a condensed water tank 13 along a condensation recovery pipeline 12, and is sent to a plant area for comprehensive water treatment along a condensed water conveying pipeline 15 after being boosted by a condensed water booster pump 14.

The invention has the advantages that:

1. the blast furnace slag flushing water adopts a cooling tower cooling treatment process, the water supply temperature of the slag flushing water is reduced to 40-50 ℃, and the slag flushing water with lower temperature is beneficial to reducing the generation of slag flushing exhaust steam from the source;

2. the environment-friendly condensation, dehumidification and whitening device is additionally arranged for condensation, cooling and dehumidification, the cyclone dehydrator and the flow divider are arranged in the environment-friendly condensation, dehumidification and whitening device, exhaust steam is guided to rotate and rise in the device, the exhaust steam stroke is increased, the heat and mass transfer effects in the exhaust steam are enhanced, meanwhile, small condensed water droplets in the chimney can be collided and condensed into large droplets, and the large droplets are condensed and discharged along the inner wall of the cyclone dehydrator under the action of centrifugal force. The target requirement of reducing the moisture content of the dead steam of the blast furnace slag flushing water can be met by reasonably selecting the capacity of equipment;

3. because the blast furnace slag flushing exhaust steam condensate is acidic, the condensate water can be independently collected and treated, and the slag flushing water system is prevented from being mixed, so that the slag flushing water system generates acid corrosion to equipment, and the service life of the equipment is influenced.

Drawings

FIG. 1 is a system architecture and flow diagram. The device mainly comprises a slag runner 1, a granulation tower 2, a granulation tower outlet water pipeline 3, a stirring cage 4, a stirring cage sealing cover 5, a steam exhaust pipeline 6, a stirring cage outlet water pipeline 7, a cooling tower 8, a slag flushing water supply pump 9, a slag flushing water supply pipeline 10, an environment-friendly condensation dehumidification and white elimination device 11, a condensed water collection pipeline 12, a condensed water tank 13, a condensed water pressure pump 14 and a condensed water conveying pipeline 15.

Detailed Description

The utility model provides a white system that disappears of blast furnace towards sediment exhaust steam "source dehumidification + condensation dehumidification + whirl dehydration", its characterized in that: mainly comprises a slag runner 1, a granulation tower 2, a granulation tower outlet water pipeline 3, a stirring cage 4, a stirring cage sealing cover 5, a steam exhaust pipeline 6, a stirring cage outlet water pipeline 7, a cooling tower 8, a slag flushing water supply pump 9, a slag flushing water supply pipeline 10, an environment-friendly condensation dehumidification and decontamination device 11, a condensed water collection pipeline 12, a condensed water tank 13, a condensed water pressure pump 14 and a condensed water conveying pipeline 15, wherein blast furnace slag is connected with the granulation tower 2 along the slag runner 1, the granulation tower 2 is connected with an inlet of the environment-friendly condensation dehumidification and decontamination device 11 through reducing, the granulation tower outlet water pipeline 3 is connected with the stirring cage 4, the stirring cage sealing cover 5 is arranged on the upper part of the stirring cage 4 and is connected with the environment-friendly condensation dehumidification and decontamination device 11 through the steam exhaust pipeline 6, slag water of the stirring cage 4 is connected with an inlet of the cooling tower 8 through the stirring cage outlet water pipeline 7, low-temperature slag flushing water cooled by the cooling tower 8 is pressurized by the slag flushing water supply pump 9 and then used for slag flushing along the slag flushing water supply pipeline 10, the condensed water produced by the environment-friendly condensation, dehumidification and whitening device 11 is sent to a condensed water tank 13 along a condensed water collecting pipeline 12, and is sent to a plant area for comprehensive water treatment along a condensed water conveying pipeline 15 after being boosted by a condensed water booster pump 14.

The slag flushing dead steam whitening of the whitening system comprises the following steps:

the method comprises the following steps: the 1500 ℃ molten slag enters the granulation tower 2 along the slag runner 1, and fully exchanges heat with the low-temperature slag flushing water at the temperature of 45 ℃ in the granulation tower 2 to heat up to 85 ℃, and a large amount of saturated exhaust steam is generated in the slag flushing process;

step two: slag flushing water with the temperature of 85 ℃ at the outlet of the granulating tower enters the stirring cage 4 along the outlet water pipeline 3 of the granulating tower to be subjected to slag-water separation, and then enters the cooling tower 8 along the outlet water pipeline 7 of the stirring cage; the exhaust steam generated by the stirring cage is converged into an environment-friendly condensation, dehumidification and whitening device 11 through an exhaust steam pipeline 6;

step three: the slag flushing water with higher temperature is cooled by a cooling tower 8, the temperature of the slag flushing water is reduced to 45 ℃ after the slag flushing water exchanges heat with the outside air fully, and the slag flushing water is pressurized by a slag flushing water supply pump 9 and then is used for flushing slag in the slag runner 1 along a slag flushing water supply pipeline 10;

step four: a large amount of saturated exhaust steam at the temperature of 80-90 ℃ is generated in the slag flushing process in the granulation tower 2 and enters an environment-friendly condensation, dehumidification and white elimination device 11 above the granulation tower 2;

step five: and condensing, cooling and dehumidifying the saturated exhaust steam at the temperature of 80-90 ℃ in an environment-friendly condensation and dehumidification and de-whitening device 11, and then discharging into the atmosphere. Meanwhile, the condensed water flows into a liquid accumulation tank at the bottom of the device along the inner wall of the environment-friendly condensation, dehumidification and whitening device 11;

step six: the condensed water in the liquid collecting tank is sent to a condensed water tank 13 along a condensation recovery pipeline 12, and is sent to a plant area for comprehensive water treatment along a condensed water conveying pipeline 15 after being boosted by a condensed water booster pump 14.