阅读说明：本技术 退火炉冷却段冷却系统、冷却工艺及不锈钢 (Cooling system and cooling process for cooling section of annealing furnace and stainless steel ) 是由 郑刚平 朱久平 于 2020-06-17 设计创作，主要内容包括：本发明公开了一种退火炉冷却段冷却系统、冷却工艺及不锈钢,包括退火炉冷却段和冷却水供给池,退火炉冷却段设初冷段、中间冷却段和最终冷却段,初冷段内设第一喷头,中间冷却段和最终冷却段设第二喷头,第二喷头与冷却水供给池连接；冷却水供给池上部设冷却风机；第一喷头通过蒸汽管道连接蒸汽；初冷段、中间冷却段和最终冷却段在退火炉底部连通,退火炉底部连接冷却水收集池；冷却水收集池、砂石过滤器、冷却风机连接,冷却水经冷却风机冷却后落在冷却水供给池内。本发明的优点是蒸汽作为冷却介质一次性使用,在初冷段对带钢进行冷却,改善了冷却水水质,对带钢冷却效果及板型控制起到改善作用,提高了第一管道和第一喷头、第二喷头的使用寿命。(The invention discloses a cooling system of a cooling section of an annealing furnace, a cooling process and stainless steel, comprising the cooling section of the annealing furnace and a cooling water supply pool, wherein the cooling section of the annealing furnace is provided with a primary cooling section, an intermediate cooling section and a final cooling section; a cooling fan is arranged at the upper part of the cooling water supply pool; the first spray head is connected with steam through a steam pipeline; the primary cooling section, the intermediate cooling section and the final cooling section are communicated at the bottom of the annealing furnace, and the bottom of the annealing furnace is connected with a cooling water collecting pool; the cooling water collecting pool, the sand filter and the cooling fan are connected, and the cooling water falls into the cooling water supply pool after being cooled by the cooling fan. The invention has the advantages that the steam is used as a cooling medium for one time, the strip steel is cooled in the initial cooling section, the quality of cooling water is improved, the cooling effect and the plate type control of the strip steel are improved, and the service lives of the first pipeline, the first spray head and the second spray head are prolonged.)

1. The cooling system of the cooling section of the annealing furnace comprises the cooling section of the annealing furnace and a cooling water supply pool, wherein the cooling section of the annealing furnace is sequentially provided with a primary cooling section, an intermediate cooling section and a final cooling section along the running direction of strip steel, a first spray head is arranged in the primary cooling section, and second spray heads are arranged in the intermediate cooling section and the final cooling section and are connected with the cooling water supply pool; a cooling fan is arranged at the upper part of the cooling water supply pool; the method is characterized in that: the first spray head is connected with steam through a steam pipeline; the primary cooling section, the intermediate cooling section and the final cooling section are communicated at the bottom of the annealing furnace, and the bottom of the annealing furnace is connected with a cooling water collecting pool; the cooling water collecting pool, the sand filter and the cooling fan are connected, and cooling water falls into the cooling water supply pool after being cooled by the cooling fan.

2. The annealing furnace cooling section cooling system according to claim 1, characterized in that: the second spray head is connected with the cooling water supply pool, and the cooling water collection pool, the sand filter and the cooling fan are connected through a first pipeline.

3. The annealing furnace cooling section cooling system according to claim 2, characterized in that: and a first water supply pump is arranged on a first pipeline between the cooling water collecting tank and the sand filter.

4. The annealing furnace cooling section cooling system according to claim 2 or 3, characterized in that: and a second water supply pump is arranged on the cooling water supply pool and the first pipelines of the intermediate cooling section and the final cooling section.

5. The annealing furnace cooling section cooling system according to claim 2 or 3, characterized in that: the sand filter is parallelly connected and provided with a plurality of sand filters, and the water inlet and the water outlet of each sand filter are provided with control valves, so that the sand filters are parallelly connected and convenient to be maintained in the alternate use industry.

6. The annealing furnace cooling section cooling system according to claim 2 or 3, characterized in that: the temperature of the steam was 130 ℃.

7. The annealing furnace cooling section cooling system according to claim 2 or 3, characterized in that: the water temperature of the cooling water sprayed out of the second spray head is 35 ℃.

8. The cooling process of the cooling section of the annealing furnace is characterized in that: the cooling section of the annealing furnace is sequentially provided with a primary cooling section, an intermediate cooling section and a final cooling section along the running direction of the stainless steel strip; a first spray head is arranged in the primary cooling section, steam is used by the first spray head, the temperature of the steam is 130 ℃, and the stainless steel strip steel is cooled to about 650 ℃; and the intermediate cooling section and the final cooling section are provided with second spray heads, the second spray heads use cooling water, the temperature of the cooling water is less than or equal to 35 ℃, and the strip steel is cooled to be below 80 ℃ in the final cooling section.

9. A stainless steel characterized by: the stainless steel is cooled by a cooling system of a cooling section of the annealing furnace according to any one of claims 1 to 6.

Technical Field

The invention belongs to the technical field of annealing and cooling, and particularly relates to a cooling circulation system and a cooling process for cooling operation of a thermal annealing and pickling engineering steel strip in a cooling section of an annealing furnace, and stainless steel produced by using the cooling process.

Technical Field

The annealing furnace is mainly used for the annealing process after rolling the stainless steel plate strip, and aims to homogenize the chemical components and the structure of the steel, refine crystal grains and adjust the hardness. Its advantages are: 1. the forming and processing performance of the steel is improved; 2. eliminating internal stress and work hardening; 3. and (4) recovering the plastic deformation capability. The annealing furnace comprises a heating section and a cooling section, wherein the cooling section process of the strip steel influences the solid solution effect, the performance and the plate shape of the carbide of the stainless steel; in the continuous hot annealing and pickling process of the stainless steel, after annealing and recrystallization are carried out on a steel strip, in order to prevent ferrite from separating out and refine the structure crystal grain requirements, a cooling section is arranged behind a horizontal annealing furnace to rapidly cool the steel strip so as to meet the structure performance requirements and meet the customer requirements. In the prior art, the annealing furnace primary cooling section cooling design adopts industrial water or the aerial fog that industrial water and compressed air mix as cooling medium, and the cooling water supplies the annealing furnace cooling section through the industrial water pipe network, and the water flows through pipeline and shower nozzle direct injection and cools off the steel band on the steel band surface, and the water after the cooling is retrieved to the collecting pit with the cinder that erodees and drop down together, and cooling water is carried to the cooling tower and is dispelled the heat the cooling after the sedimentation treatment, and later supply annealing furnace cooling section recycle. The defects are that the cooling water is recycled for a long time, impurities in the cooling water are increased, the first pipeline and the spray head are easily blocked, the cooling effect is poor, and the adverse effect on the plate shape control is caused.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems that in the prior art, cooling water is recycled, so that impurities in water are increased during long-term production, the first pipeline and the spray nozzle are easily blocked, the cooling effect is poor, and adverse effects are caused on plate type control.

2. Technical scheme

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

the cooling system of the cooling section of the annealing furnace comprises the cooling section of the annealing furnace and a cooling water supply pool, wherein the cooling section of the annealing furnace is sequentially provided with a primary cooling section, an intermediate cooling section and a final cooling section along the running direction of strip steel, a first spray head is arranged in the primary cooling section, and second spray heads are arranged in the intermediate cooling section and the final cooling section and are connected with the cooling water supply pool; a cooling fan is arranged at the upper part of the cooling water supply pool; the first spray head is connected with steam through a steam pipeline; the primary cooling section, the intermediate cooling section and the final cooling section are communicated at the bottom of the annealing furnace, and the bottom of the annealing furnace is connected with a cooling water collecting pool; the cooling water collecting pool, the sand filter and the cooling fan are connected, and cooling water falls into the cooling water supply pool after being cooled by the cooling fan.

In a specific embodiment of the invention, the second spray head is connected with a cooling water supply pool, and the cooling water collection pool, the sand filter and the cooling fan are connected through a first pipeline.

In a specific embodiment of the invention, a first water supply pump is arranged on a first pipeline between the cooling water collecting tank and the sand filter.

In a specific embodiment of the invention, the first pipelines of the cooling water supply tank and the intermediate cooling section and the final cooling section are provided with second water supply pumps.

In a specific embodiment of the invention, a plurality of sand filters are arranged in parallel, and the water inlet and the water outlet of each sand filter are provided with control valves, so that the parallel arrangement is convenient for alternate use and industrial maintenance.

In a specific embodiment of the invention, the temperature of the steam is 130 ℃.

In a specific embodiment of the present invention, the water temperature of the cooling water sprayed from the second spray head is 35 ℃.

The invention also aims to provide a cooling process of a cooling section of an annealing furnace, which is characterized in that the cooling section of the annealing furnace is sequentially provided with a primary cooling section, an intermediate cooling section and a final cooling section along the running direction of stainless steel strip steel; a first spray head is arranged in the primary cooling section, steam is used by the first spray head, the temperature of the steam is 130 ℃, and the stainless steel strip steel is cooled to about 650 ℃; and the intermediate cooling section and the final cooling section are provided with second spray heads, the second spray heads use cooling water, the temperature of the cooling water is less than or equal to 35 ℃, and the strip steel is cooled to be below 80 ℃ in the final cooling section.

The invention also aims to provide stainless steel which is characterized in that the stainless steel is cooled by the cooling system of the cooling section of the annealing furnace.

When the cooling device is used, a first spray head of a primary cooling section is connected with a steam air source through a steam pipeline, an intermediate cooling section and a final cooling section are connected with a cooling water supply tank, stainless steel strip enters a cooling section of an annealing furnace from the primary cooling section, steam at about 130 ℃ is introduced to rapidly cool the stainless steel strip from above 1000 ℃ to about 650 ℃, cooling water is introduced into the intermediate cooling section and the final cooling section through a second spray head, the stainless steel strip is subjected to intermediate cooling and final cooling, the steam and the cooling water subjected to heat exchange in the cooling section of the annealing furnace are collected and then enter a cooling water collecting tank, the steam and the cooling water are pumped into a sand filter by a first water supply pump to be filtered, the steam and the cooling water enter a cooling fan after passing through the sand filter, the cooling water is subjected to heat exchange and cooling, and the cooled cooling water enters.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that: simple structure, the installation is simple and easy, steam is disposable as cooling medium, cool off belted steel at the initial cooling section, cooling water quality of water has been improved greatly, play huge improvement effect to steel band cooling effect and board type control, simultaneously for first pipeline and first shower nozzle, the maintenance work of second shower nozzle brings the convenience, first pipeline and first shower nozzle have been improved, the life of second shower nozzle, play very big promotion effect in the aspect of production facility maintenance and product quality improvement, certain cost improvement benefit possesses.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1-a primary cooling section 2-an intermediate cooling section 3-a final cooling section 4-a steam pipeline 5-a cooling water supply pool 6-a cooling fan 7-a cooling water collection pool 8-a sand filter 9-a first pipeline 10-a first water supply pump 11-a second water supply pump 12-a control valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a cooling water circulation system of a cooling section of an annealing furnace comprises the cooling section of the annealing furnace, wherein the cooling section of the annealing furnace is sequentially provided with a primary cooling section 1, an intermediate cooling section 2 and a final cooling section 3 along the running direction of strip steel; the method is characterized in that a first spray head is arranged in the primary cooling section 1 and is connected with a steam pipeline 4; the intermediate cooling section 2 and the final cooling section 3 are provided with second spray heads, and the second spray heads are connected with a cooling water supply pool 5; a cooling fan 6 is arranged at the upper part of the cooling water supply pool 5; a cooling water collecting pool 7 communicated with the primary cooling section 1, the intermediate cooling section 2 and the final cooling section 3 is arranged at the bottom of the annealing furnace; the cooling water collection tank 7, the sand filter 8 and the cooling fan 6 are connected, and cooling water is cooled by the cooling fan 6 and then falls into the cooling water supply tank 5.

The second nozzle is connected with the cooling water supply pool 5, the cooling water collection pool 7, the sand filter 8 and the cooling fan 6 through a first pipeline 8.

A first water supply pump 10 is provided on the first pipe 8 between the cooling water collection tank 7 and the sandstone filter 8.

The cooling water supply tank 5 and the first pipes 8 of the intermediate cooling stage 2 and the final cooling stage 3 are provided with a second water supply pump 11.

The sand filter 8 is provided with a plurality of sand filters in parallel, the water inlet and the water outlet of each sand filter 8 are provided with control valves 12, and the sand filters are arranged in parallel to facilitate the alternate use and the industrial maintenance.

In order to control the flow of gas and water, the primary cooling section 1, the intermediate cooling section 2 and the final cooling section 3 are provided with flow meters.

In order to facilitate the measurement of the temperature of the strip steel, the initial cooling section 1, the intermediate cooling section 2 and the final cooling section 3 are all provided with high temperature resistance thermometers.

The cooling medium in the steam pipeline 4 is steam, and the temperature of the steam is 130 ℃; in the initial cooling section 1, the temperature of the steel strip plate is rapidly cooled from 1050 ℃ to below 650 ℃ by steam sprayed by a first spray head.

The temperature of the cooling water in the cooling water supply tank was 35 ℃.

During the use, the first shower nozzle of the primary cooling section 1 passes through steam conduit 4 and connects the steam air supply, the cooling water worker is given the pond in middle cooling section 2 and the 3 connection of final cooling section, belted steel gets into annealing stove cooling section from primary cooling section 1, let in steam about 130 ℃ with the steel band plate temperature by 1050 ℃ rapid cooling to below 650 ℃, middle cooling section 2 and final cooling section 3 let in cooling water through the second shower nozzle, carry out middle cooling and final cooling to the belted steel, belted steel cools to below 80 ℃ in final cooling section, steam and the cooling water through the heat transfer are collected to cooling water collecting pit 7 in the annealing stove cooling section, filter in the sand and stone filter 8 by first pump again, get into cooling blower 6 after sand and stone filter 8, cool off the cooling water of heat transfer, the cooling water after the cooling gets into cooling water supply pool 5, supply reuse.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.