CN201381284Y - Oxygen-enriched combustion-supporting device for mixing vertical lime kiln - Google Patents
Oxygen-enriched combustion-supporting device for mixing vertical lime kiln Download PDFInfo
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- CN201381284Y CN201381284Y CN200920152049U CN200920152049U CN201381284Y CN 201381284 Y CN201381284 Y CN 201381284Y CN 200920152049 U CN200920152049 U CN 200920152049U CN 200920152049 U CN200920152049 U CN 200920152049U CN 201381284 Y CN201381284 Y CN 201381284Y
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000001301 oxygen Substances 0.000 title claims abstract description 114
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 114
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 26
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 26
- 239000004571 lime Substances 0.000 title claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 abstract description 10
- 239000000446 fuel Substances 0.000 abstract description 7
- 230000007423 decrease Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006213 oxygenation reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
一种混料竖式石灰窑的富氧助燃装置，它的鼓风机出口与送风管线连接，送风管线上安装有氧气流量计，送风管线的内部安装有氧气分配器，尾部与位于石灰窑下部的风室连通。输氧管线与送风管线平行设置与送风管线连接，该输氧管线上设置有控制调节氧气量的调节阀组，支风管与位于氧气分配器前段的送风管线连接，另一端与出灰机上方连接形成气封。该装置的氧气分配器与氧气管线连接，不但可提高氧气浓度，降低燃料，提高窑气CO2浓度，而且相同石灰窑负荷下，鼓风机电流下降13％左右。在氧气与空气混合前的管线上引出一个支风管线，把普通空气送到出灰机上方形成气封，从而减少出灰机对氧气造成的泄露。
An oxygen-enriched combustion-supporting device for a mixing vertical lime kiln. The outlet of the blower is connected to the air supply pipeline. An oxygen flow meter is installed on the air supply pipeline. An oxygen distributor is installed inside the air supply pipeline. The lower air chamber is connected. The oxygen delivery pipeline is set parallel to the air supply pipeline and connected with the air supply pipeline. The oxygen delivery pipeline is equipped with a regulating valve group to control and adjust the oxygen volume. The upper connection forms an air seal. The oxygen distributor of the device is connected with the oxygen pipeline, which not only can increase the oxygen concentration, reduce the fuel, and increase the CO2 concentration of the kiln gas, but also the current of the blower decreases by about 13% under the same lime kiln load. A branch air pipeline is drawn from the pipeline before the oxygen and air are mixed, and the ordinary air is sent to the top of the ash machine to form an air seal, thereby reducing the leakage of the ash machine to oxygen.
Description
技术领域： Technical field:
本实用新型涉及一种混料竖窑的富氧助燃装置，具体的说是一种应用于化工、冶金、制糖等行业混料竖式石灰窑的富氧助燃装置。The utility model relates to an oxygen-enriched combustion-supporting device for a vertical mixing kiln, in particular to an oxygen-enriching combustion-supporting device for a vertical lime kiln for mixing materials in industries such as chemical industry, metallurgy, and sugar production.
背景技术： Background technique:
目前国内化工、冶金、制糖、建筑行业所使用的大型机械化混料竖式石灰窑，普遍使用鼓风机将空气送入窑内的助燃方式。利用空气助燃的石灰窑，由于空气中O2的浓度只有20.9％，而氮气和其它惰性气体却占绝大部分，这大部分气体对燃料燃烧又没有任何作用，导致煅烧区较长，燃料燃烧不充分，煅烧温度较低，从而造成燃料消耗较高，而且由于燃料的增加，导致所产生的气体中CO2浓度偏低，因此普通石灰窑产生的窑气中CO2浓度很难达到42％以上，这对需要高浓度CO2的制碱、制糖行业来说极为不利。At present, the large mechanized mixing vertical lime kilns used in the domestic chemical industry, metallurgy, sugar refining and construction industries generally use the combustion-supporting method of sending air into the kiln by a blower. In the lime kiln that uses air to support combustion, the concentration of O2 in the air is only 20.9%, while nitrogen and other inert gases account for the vast majority. Insufficient, the calcination temperature is low, resulting in high fuel consumption, and due to the increase of fuel, the CO 2 concentration in the gas produced is low, so the CO 2 concentration in the kiln gas produced by ordinary lime kilns is difficult to reach 42% Above, this is extremely unfavorable for the alkali and sugar industries that require high concentrations of CO2 .
实用新型内容： Utility model content:
本实用新型的发明目的在于针对现有技术的诸多不足，提供一种能够降低石灰窑燃料消耗，提高产出气体中的CO2浓度以及提高石灰窑生产能力的混料竖式石灰窑的富氧助燃装置。The purpose of the invention of the utility model is to provide a kind of oxygen-enriched oxygen-enriched lime kiln that can reduce the fuel consumption of the lime kiln, increase the CO2 concentration in the output gas and improve the production capacity of the lime kiln for many deficiencies in the prior art. Combustion device.
实现上述发明目的采用以下技术方案：一种混料竖式石灰窑的富氧助燃装置，包括鼓风机，氧气分配器，位于装置之外的DCS控制器，所述的鼓风机出口与送风管线连接，所述送风管线上安装有氧气流量计，送风管线的内部安装有氧气分配器，送风管线的尾部与位于石灰窑下部的风室连通，输氧管线与送风管线平行设置与送风管线连接，该输氧管线上设置有控制调节氧气量的调节阀组，支风管与位于氧气分配器前段的送风管线连接，另一端与出灰机上方连接形成气封。The following technical solutions are adopted to achieve the above invention: an oxygen-enriched combustion-supporting device for a mixing vertical lime kiln, including a blower, an oxygen distributor, and a DCS controller located outside the device, the outlet of the blower is connected to the air supply pipeline, An oxygen flow meter is installed on the air supply pipeline, and an oxygen distributor is installed inside the air supply pipeline. The tail of the air supply pipeline is connected with the air chamber located at the lower part of the lime kiln. Connection, the oxygen pipeline is equipped with a regulating valve group to control and adjust the oxygen amount, the branch air pipe is connected to the air supply pipeline located in the front section of the oxygen distributor, and the other end is connected to the upper part of the ash discharger to form an air seal.
采用上述技术方案，与现有技术相比，本实用新型在鼓风机出口的送风管线上，加装氧气分配器，氧气分配器与氧气管线连接，空气与氧气经过氧气分配器的混合，保证混合均匀后的富氧空气进入石灰窑下部的风室内，然后沿主风管、支风管分别进入窑内，参与石灰石的煅烧反应。本实用新型不但可提高氧气浓度，降低燃料，提高窑气CO2浓度，而且相同石灰窑负荷下，鼓风机电流下降13％左右。此外，由于大型石灰窑的出灰机，一般属于连续作业制度，有一部分富氧必然通过出灰机泄露，造成了加入氧气的浪费。为了解决这个问题，本实用新型在氧气(或富氧)与空气混合前的管线上引出一个支风管线，把普通空气送到出灰机上方形成气封，从而减少出灰机对氧气造成的泄露。Adopting the above technical scheme, compared with the prior art, the utility model installs an oxygen distributor on the air supply pipeline at the outlet of the blower, the oxygen distributor is connected with the oxygen pipeline, and the air and oxygen are mixed through the oxygen distributor to ensure the mixing The uniform oxygen-enriched air enters the air chamber at the lower part of the lime kiln, and then enters the kiln along the main air pipe and the branch air pipe to participate in the calcination reaction of limestone. The utility model can not only increase the oxygen concentration, reduce the fuel, increase the CO2 concentration of the kiln gas, but also reduce the current of the blower by about 13% under the same lime kiln load. In addition, because the ash discharge machine of a large lime kiln is generally a continuous operation system, a part of the rich oxygen must leak through the ash discharge machine, resulting in a waste of adding oxygen. In order to solve this problem, the utility model draws a branch air pipeline on the pipeline before oxygen (or oxygen-enriched) is mixed with air, and sends ordinary air to the top of the ash machine to form an air seal, thereby reducing the impact of the ash machine on oxygen. Give way.
附图说明 Description of drawings
图1是本实用新型的结构示意图。Fig. 1 is a structural representation of the utility model.
图2是氧气分配器结构示意图。Figure 2 is a schematic diagram of the structure of the oxygen distributor.
图中，鼓风机1，送风管2，调节阀组3，输氧气管线4，止回阀5，阻火器6，混合管7，氧气分配器8，氧气流量计9，支风管10，截止阀11，风室12，出灰机13，石灰窑14。In the figure, blower 1,
具体实施方式 Detailed ways
下面结合附图对本实用新型做进一步的说明Below in conjunction with accompanying drawing, the utility model is further described
本实用新型由氧气供给控制、氧气混合、支风管、安全保护四部分组成。The utility model is composed of four parts: oxygen supply control, oxygen mixing, branch air ducts and safety protection.
见图1，氧气供给控制部分由输氧管线4、送风管线2等组成，输氧管线4上安装有调节阀组3，输氧管线4的尾段安装止回阀5、阻火器6，止回阀5与阻火器6连接，阻火器6的另一端与送风管线2连接。送风管线2的前端与鼓风机1的出口连通，送风管线2的内部的中心位置安装有氧气分配器8，送风管线2上安装氧气流量计9。安装在输氧管线4上的调节阀组3用管路与氧气流量计9配合使用。输氧管线4与送风管线2平行设置，两条管线连接后的混合管7(也就是送风管线的尾端)与石灰窑14下部的风室12连通。As shown in Figure 1, the oxygen supply control part is composed of an
支风管10的前端与空气混合前的送风管线2连通，支风管10上安装有截止阀11，支风管10的尾端与出灰机13的上端连接，出灰机13与石灰窑14连通。支风管10的作用是将普通空气送到出灰机13的上方形成气封，从而减少因出灰机13泄露造成氧气的浪费。支风管10的风量控制通过截止阀11来实现。The front end of branch air pipe 10 communicates with the
本实用新型的工作过程：Working process of the present utility model:
参见附图1，首先，通过输氧管线4和送风管线2输送氧气和空气，用氧气分配器8配制一定浓度的富氧空气，根据石灰窑14需要的空气流量、加入氧气(或富氧)的浓度以及工艺所要求的富氧浓度三者之间的数值，通过DCS(或PLC)控制***计算出所需要加入的氧气(或富氧)量，根据这个数值来自动调节输氧(或富氧)管线4上的调节阀组3，以保证工艺要求的富氧浓度稳定。石灰窑14所要的空气流量根据生产负荷决定，数值由氧气流量计9提供，氧气(或富氧)的浓度由分析检测提供数据，工艺所要求的富氧浓度，操作者可根据石灰窑14的工作状态设定数值。此过程要求氧气(或富氧)的压力大于窑底压力0.1MPa，同时输氧(或富氧)管线4上安装止回阀5和阻火器6，以免发生安全事故。Referring to accompanying drawing 1, at first, convey oxygen and air through
氧气(或富氧)和空气的混合参见附图2：为了保证混合后的富氧空气浓度均匀，在送风管线2内部的中心安装一个氧气分配器8，氧气分配器8上均布有孔(60度角一个孔共计6个孔)。其功能是将空气与氧气充分混合，达到浓度均匀，以便满足石灰窑要求的气体。氧气分配器8距离窑内反应区要保证一定的距离，以防混合不均发生事故。See accompanying
减少富氧空气的泄露参见附图1：由于出灰机13连续卸出高温块状物料，必然产生气体的泄露。当通入富氧后泄露的气体中氧气浓度较高，造成氧气的浪费，为此在氧气(或富氧)与空气混合前的送风管线2上引出一个支风管线10，把普通空气送到出灰机13的上方形成气封，从而减少因出灰机13泄露造成氧气的浪费。支风管10的风量控制通过截止阀11来实现。Reducing the leakage of oxygen-enriched air is referring to accompanying drawing 1: because the ash discharger 13 unloads high-temperature massive material continuously, the leakage of gas will inevitably occur. When the oxygen concentration in the leaked gas is higher after the introduction of enriched oxygen, the waste of oxygen is caused. For this reason, a branch air pipeline 10 is drawn on the
为了防止因氧气浓度过高，对设备、人员造成伤害，本装置设置了多种连锁停止供氧。具体包括氧气(或富氧)流量的高、低限连锁、鼓风机1运行连锁及电流低限连锁、风量低限连锁、高限连锁、通讯中断连锁、氧气低压连锁、氧气高压连锁。氧气(或富氧)流量的高、低限连锁停车依靠调节阀组3中的氧气流量计9来测得数据，数据反馈给设置在设备之外的DCS(或PLC)，DCS与设定值进行比较，符合条件时，立即切断氧气供应，氧气高、低限连锁停车可避免送风流量表故障时，发生人身、操作和设备事故；鼓风机1运行连锁是通过鼓风机1运行时电气接触器的辅助接点信号输入DCS(或PLC)，当符合条件时，DCS指令调节阀组3立即切断氧气供应，可避免鼓风机1停止时，由于干扰信号或送风流量表故障引发事故；电流低限连锁也是通过DCS将鼓风机1运行电流数据与设定值进行比较，当符合条件时，DCS指令调节阀组3立即切断氧气供应，可避免鼓风机1主回路停车而鼓风机1运行时电气接触器的辅助接点不动作造成事故；风量低限连锁、高限连锁依靠氧气流量计9测得的数据来实现，原理类似氧气流量的高低限报警；氧气高、低压连锁依靠调节阀组3内安装的氧气高、低压力开关实现自动切断氧气供应；通讯中断连锁就是当调节阀组3得不到数据时自动切断氧气供应。In order to prevent damage to equipment and personnel due to excessive oxygen concentration, this device is equipped with multiple chains to stop oxygen supply. Specifically include the high and low limit chains of oxygen (or oxygen-enriched) flow, blower 1 operation chain and current low limit chain, air volume low limit chain, high limit chain, communication interruption chain, oxygen low pressure chain, oxygen high pressure chain. The high and low limit chain stop of oxygen (or oxygen-enriched) flow depends on the
下表是本实用新型与现有技术的对比实施例(本表数据以焦炭为燃料)The following table is a comparative example of the utility model and the prior art (this table data is fuel with coke)
通过上表数据可知：氧气浓度提高1％，燃料配比可降低4％左右，窑气CO2浓度可提高4％左右，相同石灰窑负荷下，鼓风机电流下降13％左右。According to the data in the above table, it can be seen that if the oxygen concentration is increased by 1%, the fuel ratio can be reduced by about 4%, the kiln gas CO2 concentration can be increased by about 4%, and the blower current can be reduced by about 13% under the same lime kiln load.
如果出灰机泄露量取平均2000m3/h，富氧浓度按1％计我们通过支风管供空气量控制在1500m3/h，则每小时可减少氧气用量15m3。If the leakage of the ash machine is 2000m 3 /h on average, and the oxygen concentration is calculated as 1%, we control the air supply through the branch air pipe at 1500m 3 /h, then the oxygen consumption can be reduced by 15m 3 per hour.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681560A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Calculation method for demanded quantity of air and oxygen in smelting system |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN106595309A (en) * | 2017-01-17 | 2017-04-26 | 孔祥旭 | Sintering oxygen enrichment system |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | A double-chamber lime kiln |
-
2009
- 2009-04-24 CN CN200920152049U patent/CN201381284Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681560A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Calculation method for demanded quantity of air and oxygen in smelting system |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN104058606B (en) * | 2014-05-31 | 2016-08-24 | 石家庄新华能源环保科技股份有限公司 | Oxygen-enriched combusting produces the method and apparatus of lime |
| CN106595309A (en) * | 2017-01-17 | 2017-04-26 | 孔祥旭 | Sintering oxygen enrichment system |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | A double-chamber lime kiln |
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