CN219991641U - Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device - Google Patents
Blast furnace coal injection and pulverizing system with coal powder bin negative pressure device Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 121
- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 37
- 239000000843 powder Substances 0.000 title claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 45
- 239000004744 fabric Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Abstract
本实用新型为一种设有煤粉仓负压装置的高炉喷煤制粉系统,包括磨机、布袋收粉器、煤粉仓、主排风机和控制部,煤粉仓连通设置吸潮管,吸潮管的出口通过第一支路或第二支路连通布袋收粉器的入口,第二支路上设置负压装置,负压装置包括引射器,引射器上连通引射气罐,引射器内设置引射喷嘴,引射气罐供给的引射气流从引射喷嘴喷出形成负压区;磨机、布袋收粉器、煤粉仓、主排风机、第一支路、第二支路、负压装置均与控制部电连接。本实用新型解决在制粉系统检修、停止工作时,煤粉仓不能保持负压而导致仓内水汽和CO等可燃气体不能及时排出的问题;煤粉仓始终处于负压状态,不需要消耗外界的机械能或电能,节约了能源消耗,解决了设备占地问题。
The utility model is a blast furnace injection coal pulverizing system equipped with a negative pressure device for a pulverized coal bunker, which includes a mill, a bag pulverizer, a pulverized coal bunker, a main exhaust fan and a control unit. The pulverized coal bunker is connected with a moisture-absorbing pipe. , the outlet of the moisture suction pipe is connected to the entrance of the bag powder collector through the first branch or the second branch, and a negative pressure device is set on the second branch. The negative pressure device includes an ejector, and the ejector is connected to the ejector gas tank. , an ejector nozzle is installed in the ejector, and the ejector airflow supplied by the ejector gas tank is ejected from the ejector nozzle to form a negative pressure area; mill, bag dust collector, pulverized coal bin, main exhaust fan, first branch , the second branch, and the negative pressure device are all electrically connected to the control unit. The utility model solves the problem that when the pulverizing system is overhauled and stopped working, the pulverized coal bin cannot maintain negative pressure, causing water vapor, CO and other combustible gases in the bin to be unable to be discharged in time; the pulverized coal bin is always in a negative pressure state and does not need to consume the outside world. of mechanical energy or electrical energy, saving energy consumption and solving the problem of equipment occupying space.
Description
技术领域Technical field
本实用新型涉及高炉制粉系统技术领域,尤其涉及一种设有煤粉仓负压装置的高炉喷煤制粉系统。The utility model relates to the technical field of blast furnace pulverizing systems, and in particular to a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bin.
背景技术Background technique
目前高炉制粉系统多采用一级布袋收粉工艺,即磨煤机碾磨出的煤粉经干燥气体烘干,随气流进入布袋收粉器,煤粉被收集于灰斗,再经煤粉筛进入煤粉仓储存。而经布袋收粉器过滤后的气体,通过主排风机排入大气。喷煤制粉系统正常工作时,要求煤粉仓内保持负压,一方面为了排出仓内水汽和煤粉受热分解出的可燃气体;另一方面,可以防止煤粉外溢,利于环保,符合防爆要求。At present, the blast furnace pulverizing system mostly adopts the first-level bag powder collection process, that is, the pulverized coal ground by the coal mill is dried by dry gas, and enters the bag powder collector with the air flow. The pulverized coal is collected in the ash hopper, and then passed through the pulverized coal The sieve enters the pulverized coal bin for storage. The gas filtered by the bag dust collector is discharged into the atmosphere through the main exhaust fan. When the coal injection pulverizing system works normally, it is required to maintain a negative pressure in the pulverized coal bin. On the one hand, it is to discharge the water vapor in the bin and the combustible gas decomposed by the thermal decomposition of the pulverized coal; on the other hand, it can prevent the pulverized coal from overflowing, which is beneficial to environmental protection and meets the requirements of explosion prevention. Require.
现有技术多采用吸潮管与布袋收粉器连通,利用主排风机或专有风机产生负压,煤粉仓顶通过管道(吸潮管)连接至布袋收粉器入口,在制粉系统工作时,煤粉仓内的气体经管道(吸潮管)排出,煤粉仓内可保持微负压状态。该技术中,当主排风机不工作时,布袋收粉器内为常压状态,仅靠吸潮管的“烟囱效应”无法将气体全部排出,仓内将成为正压状态,煤粉产生的CO等可燃气体含量也可能超标,不利于系统安全。因此,在采用吸潮管方案时,需将主排风机设计为变频风机,当制粉系统暂停工作或磨机等设备检修时,主排风机降低工作频率,调小风量,使得整个制粉系统持续保持负压状态,但这样耗电高,且并未考虑主排风机检修的时间。而专门设置小排量放散风机,又会增加投资。The existing technology mostly uses a moisture-absorbing pipe to connect to the bag powder collector, and uses the main exhaust fan or a proprietary fan to generate negative pressure. The top of the pulverized coal bin is connected to the entrance of the bag powder collector through a pipe (moisture-absorbing pipe). In the powder making system During operation, the gas in the pulverized coal bin is discharged through the pipe (moisture absorbing pipe), and the pulverized coal bin can maintain a slightly negative pressure state. In this technology, when the main exhaust fan is not working, the inside of the bag powder collector is in a normal pressure state. The "chimney effect" of the moisture absorption pipe alone cannot discharge all the gas. The inside of the warehouse will become a positive pressure state, and the CO generated by the pulverized coal will The content of other combustible gases may also exceed the standard, which is not conducive to system safety. Therefore, when using the moisture-absorbing pipe solution, the main exhaust fan needs to be designed as a variable frequency fan. When the milling system is suspended or the mill and other equipment are inspected, the main exhaust fan will reduce the working frequency and reduce the air volume, so that the entire milling system Continuously maintain negative pressure, but this consumes a lot of power and does not take into account the maintenance time of the main exhaust fan. And specially setting up a small-displacement dispersion fan will increase investment.
或者在煤粉仓顶设置带有小风机的仓顶布袋除尘器产生负压。仓内气体进入仓顶布袋,经除尘后,随风机排放至大气。设置仓顶布袋需要预留较大空间,影响车间整体高度和设备布置。采用仓顶布袋和小风机,会增加投资、设备运行能源消耗及后续检修维护成本。Or set up a bag dust collector with a small fan on the top of the pulverized coal silo to generate negative pressure. The gas in the warehouse enters the cloth bag on the top of the warehouse, and after dust removal, is discharged to the atmosphere with the fan. Installing bags on the warehouse roof requires a large space to be reserved, which affects the overall height and equipment layout of the workshop. The use of cloth bags on the warehouse roof and small fans will increase investment, equipment operation energy consumption and subsequent maintenance costs.
这两种措施都存在局限性,采用吸潮管在制粉系统不工作时,煤粉仓无法产生负压环境,设置仓顶除尘器又太过复杂,且增加投资,亟需新技术来解决上述问题。Both measures have limitations. When the pulverizing system is not working when the moisture-absorbing pipe is used, the pulverized coal bin cannot create a negative pressure environment. Setting up a dust collector on the top of the bin is too complicated and increases investment. New technology is urgently needed to solve the problem. the above issues.
由此,本发明人凭借多年从事相关行业的经验与实践,提出一种设有煤粉仓负压装置的高炉喷煤制粉系统,以克服现有技术的缺陷。Therefore, relying on many years of experience and practice in related industries, the inventor proposes a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker to overcome the shortcomings of the existing technology.
实用新型内容Utility model content
本实用新型的目的在于提供一种设有煤粉仓负压装置的高炉喷煤制粉系统,解决在制粉系统检修、停止工作时,煤粉仓不能保持负压而导致仓内水汽和CO等可燃气体不能及时排出的问题;本实用新型的煤粉仓始终处于负压状态,引射器为负压装置的核心结构,不需要任何传动部件;不需要消耗外界的机械能或电能,节约了能源消耗,解决了设备占地问题。The purpose of this utility model is to provide a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker, so as to solve the problem that the pulverized coal bunker cannot maintain negative pressure and cause water vapor and CO in the bunker when the pulverizing system is overhauled and stopped working. Such as the problem that combustible gas cannot be discharged in time; the pulverized coal bunker of this utility model is always in a negative pressure state, and the ejector is the core structure of the negative pressure device and does not require any transmission components; it does not need to consume external mechanical energy or electrical energy, saving Energy consumption is reduced and the problem of equipment occupying space is solved.
本实用新型的目的是这样实现的,一种设有煤粉仓负压装置的高炉喷煤制粉系统,包括磨机、布袋收粉器、煤粉仓、主排风机和控制部,所述煤粉仓的顶部连通设置吸潮管,所述吸潮管的出口通过并联设置的第一支路或第二支路连通所述布袋收粉器的入口,所述第二支路上设置负压装置,所述负压装置包括引射器,所述引射器上连通引射气罐,所述引射器内设置引射喷嘴,所述引射气罐供给的引射气流从所述引射喷嘴喷出形成负压区;所述磨机、所述布袋收粉器、所述煤粉仓、所述主排风机、所述第一支路、所述第二支路、所述负压装置均与所述控制部电连接。The purpose of this utility model is achieved by providing a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bin, including a mill, a bag pulverizer, a pulverized coal bin, a main exhaust fan and a control unit. A moisture-absorbing pipe is connected to the top of the pulverized coal bin. The outlet of the moisture-absorbing pipe is connected to the entrance of the bag powder collector through a first branch or a second branch arranged in parallel. A negative pressure is set on the second branch. device, the negative pressure device includes an ejector, the ejector is connected to an ejector gas tank, an ejector nozzle is provided in the ejector, and the ejector airflow supplied by the ejector gas tank is from the ejector gas tank. The jet nozzle sprays out to form a negative pressure area; the mill, the bag dust collector, the pulverized coal bin, the main exhaust fan, the first branch, the second branch, the negative The pressure devices are all electrically connected to the control part.
在本实用新型的一较佳实施方式中,所述引射器通过引射气管道连通所述引射气罐,所述引射气管道上设置流量调节阀、流量计和第五切断阀,所述流量调节阀、所述流量计和所述第五切断阀均与所述控制部电连接。In a preferred embodiment of the present invention, the ejector is connected to the ejector gas tank through an ejector gas pipeline, and a flow regulating valve, a flow meter and a fifth shut-off valve are provided on the ejector gas pipeline. The flow regulating valve, the flow meter and the fifth shut-off valve are all electrically connected to the control part.
在本实用新型的一较佳实施方式中,所述煤粉仓的顶部连通设置压力变送器;所述第一支路上设置第一切断阀和第二切断阀,所述第二支路上位于所述引射器的两端分别设置第三切断阀和第四切断阀;所述压力变送器、所述第一切断阀、所述第二切断阀、所述第三切断阀和所述第四切断阀均与所述控制部电连接。In a preferred embodiment of the present invention, a pressure transmitter is connected to the top of the pulverized coal bunker; a first cut-off valve and a second cut-off valve are set on the first branch, and the second branch is located on A third cut-off valve and a fourth cut-off valve are respectively provided at both ends of the ejector; the pressure transmitter, the first cut-off valve, the second cut-off valve, the third cut-off valve and the The fourth shut-off valves are all electrically connected to the control unit.
在本实用新型的一较佳实施方式中,所述吸潮管上设有耐磨金属软管。In a preferred embodiment of the present invention, the moisture-absorbing pipe is provided with a wear-resistant metal hose.
在本实用新型的一较佳实施方式中,所述引射器的内腔衬有耐磨陶瓷层。In a preferred embodiment of the present invention, the inner cavity of the ejector is lined with a wear-resistant ceramic layer.
在本实用新型的一较佳实施方式中,所述引射喷嘴采用耐磨金属或陶瓷材质制成。In a preferred embodiment of the present invention, the injection nozzle is made of wear-resistant metal or ceramic material.
在本实用新型的一较佳实施方式中,所述引射气罐为氮气罐。In a preferred embodiment of the present invention, the injection gas tank is a nitrogen tank.
在本实用新型的一较佳实施方式中,所述磨机通过布袋收粉器入口管道连通所述布袋收粉器,所述第一支路和所述第二支路的出口连通于所述布袋收粉器入口管道。In a preferred embodiment of the present invention, the mill is connected to the bag powder collector through an inlet pipe of the bag powder collector, and the outlets of the first branch and the second branch are connected to the bag powder collector. Bag dust collector inlet pipe.
在本实用新型的一较佳实施方式中,所述布袋收粉器和所述煤粉仓之间设置煤粉筛。In a preferred embodiment of the present invention, a pulverized coal screen is provided between the bag pulverizer and the pulverized coal bunker.
在本实用新型的一较佳实施方式中,所述布袋收粉器通过布袋出口管道连通所述主排风机,所述主排风机的出口连通放散管道。In a preferred embodiment of the present invention, the bag powder collector is connected to the main exhaust fan through the bag outlet pipe, and the outlet of the main exhaust fan is connected to the dispersion pipe.
由上所述,本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统具有如下From the above, the blast furnace coal injection pulverizing system equipped with a pulverized coal bunker negative pressure device of the present invention has the following features:
有益效果:Beneficial effects:
本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统正常工作时,通过主排风机抽走煤粉仓内气体并排放,煤粉仓可维持约-1KPa的负压状态;在制粉系统检修、停止工作时,负压装置启动工作,使煤粉仓处于负压状态;本实用新型的煤粉仓始终处于负压状态,降低O2和CO等可燃气体含量,提高系统安全性;且能有效排出仓内水汽,从而降低煤粉含水量,提高煤粉流动性,避免因含水量高而堵塞输粉管道或喷枪,进而影响高炉生产;When the blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker of the present invention is operating normally, the gas in the pulverized coal bunker is extracted and discharged through the main exhaust fan, and the pulverized coal bunker can maintain a negative pressure state of about -1KPa; When the pulverizing system is inspected and stopped working, the negative pressure device starts working to put the pulverized coal bunker in a negative pressure state; the pulverized coal bunker of the utility model is always in a negative pressure state, reducing the content of combustible gases such as O2 and CO, and improving the system It is safe; and it can effectively discharge water vapor in the warehouse, thereby reducing the moisture content of pulverized coal, improving the fluidity of pulverized coal, and avoiding clogging of powder conveying pipelines or spray guns due to high moisture content, thereby affecting blast furnace production;
引射器为负压装置的核心结构,结构简单,经久耐用,仅依靠流体的压力、温度等参数就可以工作,不需要任何传动部件;不需要消耗外界的机械能或电能,节约了能源消耗,降低工程投资;The ejector is the core structure of the negative pressure device. It has a simple structure and is durable. It can work only by relying on the pressure, temperature and other parameters of the fluid. It does not require any transmission components; it does not need to consume external mechanical energy or electrical energy, saving energy consumption. Reduce project investment;
本实用新型有效解决在制粉系统检修、停止工作时,煤粉仓不能保持负压而导致煤粉仓内水汽和CO等可燃气体不能及时排出的问题;整套装置更为简单,无需增加布袋或风机,节约了资金,解决了设备占地问题。The utility model effectively solves the problem that the pulverized coal bunker cannot maintain negative pressure when the pulverizing system is inspected and stopped, causing water vapor, CO and other combustible gases in the pulverized coal bunker to be unable to be discharged in time; the entire device is simpler and does not require additional bags or The fan saves money and solves the problem of equipment occupying space.
附图说明Description of the drawings
以下附图仅旨在于对本实用新型做示意性说明和解释,并不限定本实用新型的范围。其中:The following drawings are only intended to schematically illustrate and explain the present invention, and do not limit the scope of the present invention. in:
图1:为本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统的示意图。Figure 1 is a schematic diagram of a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker according to the present invention.
图中:In the picture:
1、磨机;2、布袋收粉器入口管道;3、第四切断阀;4、引射器;5、流量调节阀;6、流量计;7、第五切断阀;8、引射气管道;9、引射气罐;10、第二切断阀;11、第一支路;12、第一切断阀;13、第二支路;14、第三切断阀;15、吸潮管;16、耐磨金属软管;17、煤粉仓;18、布袋收粉器;19、压力变送器;20、煤粉筛;21、布袋出口管道;22、放散管道;23、主排风机。1. Mill; 2. Bag collector inlet pipe; 3. Fourth shut-off valve; 4. Injector; 5. Flow regulating valve; 6. Flow meter; 7. Fifth shut-off valve; 8. Injection gas Pipeline; 9. Injection gas tank; 10. Second shut-off valve; 11. First branch; 12. First shut-off valve; 13. Second branch; 14. Third shut-off valve; 15. Moisture suction pipe; 16. Wear-resistant metal hose; 17. Pulverized coal bin; 18. Bag powder collector; 19. Pressure transmitter; 20. Powdered coal screen; 21. Bag outlet pipe; 22. Dispersion pipe; 23. Main exhaust fan .
具体实施方式Detailed ways
为了对本实用新型的技术特征、目的和效果有更加清楚的理解,现对照附图说明本实用新型的具体实施方式。In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.
在此描述的本实用新型的具体实施方式,仅用于解释本实用新型的目的,而不能以任何方式理解成是对本实用新型的限制。在本实用新型的教导下,技术人员可以构想基于本实用新型的任意可能的变形,这些都应被视为属于本实用新型的范围。需要说明的是,当元件被称为“设置于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。术语“安装”、“相连”、“连接”应做广义理解,例如,可以是机械连接或电连接,也可以是两个元件内部的连通,可以是直接相连,也可以通过中间媒介间接相连,对于本领域的普通技术人员而言,可以根据具体情况理解上述术语的具体含义。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的,并不表示是唯一的实施方式。The specific embodiments of the present invention described here are only for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the teachings of the present utility model, skilled persons can conceive any possible modifications based on the present utility model, and these should be regarded as belonging to the scope of the present utility model. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be an internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.
除非另有定义,本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的,不是旨在于限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing specific embodiments only and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
如图1所示,本实用新型提供一种设有煤粉仓负压装置的高炉喷煤制粉系统,包括磨机1、布袋收粉器18、煤粉仓17、主排风机23和控制部,煤粉仓17的顶部连通设置吸潮管15,吸潮管15的出口通过并联设置的第一支路11或第二支路13连通布袋收粉器的入口,第二支路13上设置负压装置,负压装置包括引射器4,引射器4上连通引射气罐9,引射器4内设置引射喷嘴,引射气罐9供给的引射气流从引射喷嘴喷出形成负压区;磨机1、布袋收粉器18、煤粉仓17、主排风机23、第一支路11、第二支路13、负压装置均与控制部电连接。As shown in Figure 1, the utility model provides a blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker, including a mill 1, a bag dust collector 18, a pulverized coal bunker 17, a main exhaust fan 23 and a control unit. The top of the pulverized coal bin 17 is connected with a moisture suction pipe 15. The outlet of the moisture suction pipe 15 is connected to the entrance of the bag dust collector through the first branch 11 or the second branch 13 arranged in parallel. The second branch 13 is on A negative pressure device is provided. The negative pressure device includes an ejector 4. The ejector 4 is connected to an ejector gas tank 9. An ejector nozzle is provided in the ejector 4. The ejector airflow supplied by the ejector gas tank 9 flows from the ejector nozzle. The ejection forms a negative pressure area; the mill 1, the bag dust collector 18, the pulverized coal bin 17, the main exhaust fan 23, the first branch 11, the second branch 13, and the negative pressure device are all electrically connected to the control unit.
本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统正常工作时,通过主排风机23抽走煤粉仓17内气体并排放,煤粉仓17可维持约-1KPa的负压状态;在制粉系统检修、停止工作时,负压装置启动工作,使煤粉仓处于负压状态;本实用新型的煤粉仓始终处于负压状态,降低O2和CO等可燃气体含量,提高系统安全性;且能有效排出仓内水汽,从而降低煤粉含水量,提高煤粉流动性,避免因含水量高而堵塞输粉管道或喷枪,进而影响高炉生产。When the blast furnace coal injection and pulverizing system equipped with a negative pressure device for a pulverized coal bunker of the present invention is operating normally, the gas in the pulverized coal bunker 17 is extracted through the main exhaust fan 23 and discharged. The pulverized coal bunker 17 can maintain a load of about -1KPa. Pressure state; when the pulverizing system is inspected and stopped working, the negative pressure device starts to work, so that the pulverized coal bunker is in a negative pressure state; the pulverized coal bunker of the utility model is always in a negative pressure state, reducing the content of combustible gases such as O 2 and CO , improve the safety of the system; and can effectively discharge water vapor in the warehouse, thereby reducing the moisture content of pulverized coal, improving the fluidity of pulverized coal, and avoiding clogging of powder conveying pipes or spray guns due to high moisture content, thereby affecting blast furnace production.
引射器为负压装置的核心结构,结构简单,经久耐用,仅依靠流体的压力、温度等参数就可以工作,不需要任何传动部件;不需要消耗外界的机械能或电能,节约了能源消耗,降低工程投资。The ejector is the core structure of the negative pressure device. It has a simple structure and is durable. It can work only by relying on the pressure, temperature and other parameters of the fluid. It does not require any transmission components; it does not need to consume external mechanical energy or electrical energy, saving energy consumption. Reduce project investment.
本实用新型有效解决在制粉系统检修、停止工作时,煤粉仓不能保持负压而导致煤粉仓内水汽和CO等可燃气体不能及时排出的问题;整套装置更为简单,无需增加布袋或风机,节约了资金,解决了设备占地问题。The utility model effectively solves the problem that the pulverized coal bunker cannot maintain negative pressure when the pulverizing system is inspected and stopped, causing water vapor, CO and other combustible gases in the pulverized coal bunker to be unable to be discharged in time; the entire device is simpler and does not require additional bags or The fan saves money and solves the problem of equipment occupying space.
进一步,如图1所示,引射器4通过引射气管道8连通引射气罐9,引射气管道8上设置流量调节阀5、流量计6和第五切断阀7,流量调节阀5、流量计6和第五切断阀7均与控制部电连接。流量计6和流量调节阀5配合完成对流量控制,调节引射器引射能力,保证煤粉仓压力维持在设定值。Further, as shown in Figure 1, the ejector 4 is connected to the ejector gas tank 9 through the ejector gas pipeline 8. The ejector gas pipeline 8 is provided with a flow regulating valve 5, a flow meter 6 and a fifth shut-off valve 7. The flow regulating valve 5. The flow meter 6 and the fifth shut-off valve 7 are both electrically connected to the control unit. The flow meter 6 and the flow regulating valve 5 cooperate to control the flow, adjust the ejection capacity of the ejector, and ensure that the pressure of the pulverized coal bunker is maintained at the set value.
进一步,如图1所示,煤粉仓17的顶部连通设置压力变送器19;第一支路11上设置第一切断阀12和第二切断阀10,第二支路13上位于引射器4的两端分别设置第三切断阀14和第四切断阀3;压力变送器19、第一切断阀12、第二切断阀10、第三切断阀14和第四切断阀3均与控制部电连接。Further, as shown in Figure 1, a pressure transmitter 19 is connected to the top of the pulverized coal bunker 17; a first cut-off valve 12 and a second cut-off valve 10 are set on the first branch 11, and the second branch 13 is located on the injection valve. The third cut-off valve 14 and the fourth cut-off valve 3 are respectively provided at both ends of the device 4; the pressure transmitter 19, the first cut-off valve 12, the second cut-off valve 10, the third cut-off valve 14 and the fourth cut-off valve 3 are all connected with The control unit is electrically connected.
负压装置考虑了煤粉对装置的磨损,仅在制粉系统不工作时使用引射器4,大大提高了引射器的寿命。与煤粉接触的部件均为耐磨件,且外部用岩棉包覆减少噪音,引射器的内腔衬有耐磨陶瓷层,引射喷嘴采用耐磨金属或陶瓷材质制成。The negative pressure device takes into account the wear and tear of the pulverized coal on the device, and only uses the ejector 4 when the pulverizing system is not working, which greatly improves the life of the ejector. The parts in contact with coal powder are all wear-resistant parts, and the outside is covered with rock wool to reduce noise. The inner cavity of the ejector is lined with a wear-resistant ceramic layer, and the ejector nozzle is made of wear-resistant metal or ceramic materials.
进一步,如图1所示,吸潮管15上设有耐磨金属软管16。Further, as shown in Figure 1, the moisture suction pipe 15 is provided with a wear-resistant metal hose 16.
在本实施方式中,引射气罐9为氮气罐。In this embodiment, the injection gas tank 9 is a nitrogen tank.
进一步,如图1所示,磨机1通过布袋收粉器入口管道2连通布袋收粉器18,第一支路11和第二支路13的出口连通于布袋收粉器入口管道2。Further, as shown in FIG. 1 , the mill 1 is connected to the bag dust collector 18 through the bag dust collector inlet pipe 2 , and the outlets of the first branch 11 and the second branch 13 are connected to the bag powder collector inlet pipe 2 .
进一步,如图1所示,布袋收粉器18和煤粉仓17之间设置煤粉筛20。Further, as shown in FIG. 1 , a pulverized coal screen 20 is provided between the bag pulverizer 18 and the pulverized coal bin 17 .
进一步,如图1所示,布袋收粉器18通过布袋出口管道21连通主排风机23,主排风机23的出口连通放散管道22。Further, as shown in FIG. 1 , the bag powder collector 18 is connected to the main exhaust fan 23 through the bag outlet pipe 21 , and the outlet of the main exhaust fan 23 is connected to the dispersion pipe 22 .
本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统正常工作时,When the blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker of the present invention is operating normally,
引射器4无需操作,第四切断阀3和第三切断阀14保持关闭(第一支路11关闭),第二切断阀10和第一切断阀12保持开启(第二支路13开启),由于布袋收粉器18的入口为负压状态(约-10KPa),煤粉仓17内气体经第一支路11进入布袋收粉器18,由主排风机23抽走并通过放散管道22排放,煤粉仓17可维持约-1KPa的负压状态。The ejector 4 does not need to be operated, the fourth cut-off valve 3 and the third cut-off valve 14 remain closed (the first branch 11 is closed), and the second cut-off valve 10 and the first cut-off valve 12 remain open (the second branch 13 is opened) , since the inlet of the bag dust collector 18 is in a negative pressure state (about -10KPa), the gas in the pulverized coal bunker 17 enters the bag powder collector 18 through the first branch 11, and is extracted by the main exhaust fan 23 and passes through the release pipe 22 Discharge, the pulverized coal bin 17 can maintain a negative pressure state of about -1KPa.
在主排风机23停止工作时,煤粉仓顶部的压力变送器19一旦检测到仓内压力超过预设值,通过控制部(自动化程序)连锁控制,自动打开第四切断阀3、第五切断阀7和第三切断阀14,关闭第二切断阀10和第一切断阀12。高速的氮气流从引射器4内的引射喷嘴喷出形成负压区,煤粉仓17内气体被抽出,两种气体混合后实现动能交换,形成中压混合气流,一并进入布袋收粉器18,随后沿布袋出口管道21-主排风机23-放散管道22,排放至大气。When the main exhaust fan 23 stops working, once the pressure transmitter 19 on the top of the pulverized coal bin detects that the pressure in the bin exceeds the preset value, it will automatically open the fourth shut-off valve 3 and the fifth shut-off valve 3 through chain control of the control part (automated program). The shut-off valve 7 and the third shut-off valve 14 close the second shut-off valve 10 and the first shut-off valve 12. The high-speed nitrogen flow is ejected from the injection nozzle in the ejector 4 to form a negative pressure area. The gas in the pulverized coal bunker 17 is extracted. After the two gases are mixed, kinetic energy exchange is realized to form a medium-pressure mixed air flow, which enters the bag collection. The powderer 18 is then discharged to the atmosphere along the bag outlet pipe 21-main exhaust fan 23-dispersion pipe 22.
由上所述,本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统具有如下From the above, the blast furnace coal injection pulverizing system equipped with a pulverized coal bunker negative pressure device of the present invention has the following features:
有益效果:Beneficial effects:
本实用新型的设有煤粉仓负压装置的高炉喷煤制粉系统正常工作时,通过主排风机抽走煤粉仓内气体并排放,煤粉仓可维持约-1KPa的负压状态;在制粉系统检修、停止工作时,负压装置启动工作,使煤粉仓处于负压状态;本实用新型的煤粉仓始终处于负压状态,降低O2和CO等可燃气体含量,提高系统安全性;且能有效排出仓内水汽,从而降低煤粉含水量,提高煤粉流动性,避免因含水量高而堵塞输粉管道或喷枪,进而影响高炉生产;When the blast furnace coal injection pulverizing system equipped with a negative pressure device for a pulverized coal bunker of the present invention is operating normally, the gas in the pulverized coal bunker is extracted and discharged through the main exhaust fan, and the pulverized coal bunker can maintain a negative pressure state of about -1KPa; When the pulverizing system is inspected and stopped working, the negative pressure device starts working to put the pulverized coal bunker in a negative pressure state; the pulverized coal bunker of the utility model is always in a negative pressure state, reducing the content of combustible gases such as O2 and CO, and improving the system It is safe; and it can effectively discharge water vapor in the warehouse, thereby reducing the moisture content of pulverized coal, improving the fluidity of pulverized coal, and avoiding clogging of powder conveying pipelines or spray guns due to high moisture content, thereby affecting blast furnace production;
引射器为负压装置的核心结构,结构简单,经久耐用,仅依靠流体的压力、温度等参数就可以工作,不需要任何传动部件;不需要消耗外界的机械能或电能,节约了能源消耗,降低工程投资;The ejector is the core structure of the negative pressure device. It has a simple structure and is durable. It can work only by relying on the pressure, temperature and other parameters of the fluid. It does not require any transmission components; it does not need to consume external mechanical energy or electrical energy, saving energy consumption. Reduce project investment;
本实用新型有效解决在制粉系统检修、停止工作时,煤粉仓不能保持负压而导致煤粉仓内水汽和CO等可燃气体不能及时排出的问题;整套装置更为简单,无需增加布袋或风机,节约了资金,解决了设备占地问题。The utility model effectively solves the problem that the pulverized coal bunker cannot maintain negative pressure when the pulverizing system is inspected and stopped, causing water vapor, CO and other combustible gases in the pulverized coal bunker to be unable to be discharged in time; the entire device is simpler and does not require additional bags or The fan saves money and solves the problem of equipment occupying space.
以上所述仅为本实用新型示意性的具体实施方式,并非用以限定本实用新型的范围。任何本领域的技术人员,在不脱离本实用新型的构思和原则的前提下所作出的等同变化与修改,均应属于本实用新型保护的范围。The above descriptions are only illustrative embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present utility model shall fall within the scope of protection of the present utility model.
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