CN202221098U - Hybrid GGH System - Google Patents
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- CN202221098U CN202221098U CN2011203095132U CN201120309513U CN202221098U CN 202221098 U CN202221098 U CN 202221098U CN 2011203095132 U CN2011203095132 U CN 2011203095132U CN 201120309513 U CN201120309513 U CN 201120309513U CN 202221098 U CN202221098 U CN 202221098U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 10
- 230000003009 desulfurizing effect Effects 0.000 claims abstract 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 26
- 230000023556 desulfurization Effects 0.000 claims description 26
- 230000003068 static effect Effects 0.000 abstract description 9
- 229910052602 gypsum Inorganic materials 0.000 abstract description 7
- 239000010440 gypsum Substances 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 34
- 239000003546 flue gas Substances 0.000 description 34
- 238000010521 absorption reaction Methods 0.000 description 9
- 238000005485 electric heating Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 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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- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
Description
技术领域 technical field
本实用新型主要涉及一种对脱硫塔出口静烟道内的热烟气进行冷却的装置，尤其涉及一种混合式GGH系统。 The utility model mainly relates to a device for cooling hot flue gas in a static flue at the outlet of a desulfurization tower, in particular to a hybrid GGH system.
背景技术 Background technique
石灰石－石膏湿法脱硫工艺是我国当前烟气脱硫工程中广泛采用的脱硫技术，为了使排烟温度达到露点之上，减轻对净烟道和烟囱的腐蚀，提高污染物的扩散度，多采用提升净烟气温度的方法。目前，国内外对提高烟囱入口烟温主要是采用回转式GGH方案、SGH方案、管式换热器方案、电加热方案四种方法，其中回转式GGH方案广泛采用。但不论采用哪种方案都直接关系到环保排放、投资及运行成本、脱硫系统设备可用率等一系列问题。其优缺点如下： Limestone-gypsum wet desulfurization process is a desulfurization technology widely used in my country's current flue gas desulfurization projects. A method to increase the temperature of the net flue gas. At present, there are mainly four methods to increase the flue gas temperature at the chimney inlet at home and abroad, including rotary GGH scheme, SGH scheme, tubular heat exchanger scheme, and electric heating scheme, among which the rotary GGH scheme is widely used. But no matter which scheme is adopted, it is directly related to a series of issues such as environmental protection emissions, investment and operating costs, and availability of desulfurization system equipment. Its advantages and disadvantages are as follows:
方案1：加装回转式GGH换热器 Option 1: Install a rotary GGH heat exchanger
在吸收塔出口烟道内安装回转式GGH换热器，利用锅炉尾部高温烟气（从电厂电除尘出口引接的高温烟气作为热源）加热吸收塔出口的低温净烟气，使净烟气温度升高，以确保在各种工况下烟囱的入口烟气温度不低于65～70℃，避免凝结水析出。 A rotary GGH heat exchanger is installed in the flue at the outlet of the absorption tower, and the high-temperature flue gas at the tail of the boiler (the high-temperature flue gas introduced from the outlet of the electric precipitator of the power plant is used as a heat source) is used to heat the low-temperature net flue gas at the outlet of the absorption tower to increase the temperature of the net flue gas. High to ensure that the flue gas temperature at the inlet of the chimney is not lower than 65-70°C under various working conditions to avoid the precipitation of condensed water.
该方案业绩较多，方案成熟，但造价高，工期长，易堵塞、运行维护量大、成本高。 This scheme has many achievements and is mature, but the cost is high, the construction period is long, it is easy to block, the operation and maintenance volume is large, and the cost is high.
方案2：加装SGH换热器 Option 2: Install SGH heat exchanger
在吸收塔出口烟道内安装SGH换热器，利用高温蒸汽（从电厂引接的厂用蒸汽作为热源）加热吸收塔出口的低温净烟气，使净烟气温度升高，以确保在各种工况下烟囱的入口烟气温度不低于65～70℃，避免凝结水析出。 The SGH heat exchanger is installed in the flue at the outlet of the absorption tower, and the high-temperature steam (the plant steam introduced from the power plant is used as a heat source) is used to heat the low-temperature clean flue gas at the outlet of the absorption tower to increase the temperature of the clean flue gas to ensure that it can be used in various industries. Under normal circumstances, the flue gas temperature at the inlet of the chimney should not be lower than 65-70°C to avoid the precipitation of condensed water.
该方案可行，业绩较多，技术成熟，但耗能大，不经济、运行成本高。 The scheme is feasible, with many achievements and mature technology, but it consumes a lot of energy, is uneconomical, and has high operating costs.
方案3：加装管式换热器 Option 3: Adding a tube heat exchanger
在吸收塔出口烟道内安装管式换热器，用来提高经吸收塔洗涤后的烟气温度。管式换热器本体布置在吸收塔烟气出口侧,原烟气由烟道进入管式换热器管内，经换热降温后进入吸收塔。脱硫后的净烟气流经管式换热器管外，吸收原烟气释放的热量。管式换热器用耐酸钢材料制作。 A tubular heat exchanger is installed in the outlet flue of the absorption tower to increase the temperature of the flue gas washed by the absorption tower. The main body of the tubular heat exchanger is arranged on the flue gas outlet side of the absorption tower. The original flue gas enters the tube of the tubular heat exchanger from the flue, and enters the absorption tower after heat exchange and cooling. The net flue gas after desulfurization flows through the tube of the tube heat exchanger to absorb the heat released by the original flue gas. The tube heat exchanger is made of acid-resistant steel.
此方案有业绩，运行可靠，但造价高，占地大、工期长，运行成本高。 This scheme has performance and reliable operation, but it is expensive, occupies a large area, has a long construction period, and high operating costs.
方案4：加装电加热装置 Option 4: Install an electric heating device
在吸收塔出口烟道内安装电加热器，或者直接在烟囱底部安装电加热器，利用不锈钢电加热管发热，使净烟气温度升高，以确保在各种工况下烟囱的入口烟气温度不低于65～70℃，减少烟气中的酸性水滴在烟道、烟囱内产生酸腐蚀，同时增加烟囱出口烟气抬升高度，提高污染物的扩散度。 Install an electric heater in the outlet flue of the absorption tower, or directly install an electric heater at the bottom of the chimney, and use a stainless steel electric heating tube to generate heat to increase the temperature of the net flue gas to ensure the temperature of the flue gas at the inlet of the chimney under various working conditions Not lower than 65-70 ℃, reduce the acidic water droplets in the flue gas to cause acid corrosion in the flue and chimney, and at the same time increase the height of the flue gas at the chimney outlet to increase the diffusion of pollutants.
该方案占地小，工期短，适宜小容量锅炉。但造价高、加热元件易腐蚀，运行成本太高。 This scheme occupies a small area and has a short construction period, which is suitable for small-capacity boilers. But the cost is high, the heating element is easy to corrode, and the operating cost is too high.
将以上方案汇总比较如下：The above schemes are summarized and compared as follows:
。发明内容. Contents of the invention
实用新型目的：本实用新型提供一种混合式GGH系统，其目的是解决以往的石灰石－石膏湿法脱硫工艺对净烟道和烟囱造成腐蚀的问题和以往的解决方法效果不理想的问题。 Purpose of the utility model: This utility model provides a hybrid GGH system, and its purpose is to solve the problem of corrosion of the clean flue and chimney caused by the previous limestone-gypsum wet desulfurization process and the unsatisfactory effect of the previous solution.
技术方案：本实用新型是通过以下技术方案来实现的： Technical solution : the utility model is realized through the following technical solutions:
一种混合式GGH系统，主要包括炉膛、磨煤机、脱硫塔和空气预热器，空气预热器与炉膛及磨煤机相连，其特征在于：在空气预热器出口的一次热风和二次热风主风道上引加热管路连接至脱硫塔出口静烟道内。 A hybrid GGH system, which mainly includes a furnace, a coal mill, a desulfurization tower and an air preheater, the air preheater is connected with the furnace and the coal mill, and is characterized in that the primary hot air and the secondary hot air at the outlet of the air preheater The heating pipeline of the secondary hot air main air duct is connected to the static flue at the outlet of the desulfurization tower.
加热管路上设置有将空气预热器出口的一次热风和二次热风引入脱硫塔出口静烟道内的引风机。 An induced draft fan is installed on the heating pipeline to introduce the primary hot air and secondary hot air from the outlet of the air preheater into the static flue at the outlet of the desulfurization tower.
在加热管路上靠近空气预热器出口的位置设置有锅炉侧关断闸板，在加热管路上靠近脱硫塔的位置设置有脱硫侧关断闸板。 On the heating pipeline, close to the outlet of the air preheater, a boiler-side shut-off ram is set, and on the heating pipeline, close to the desulfurization tower, a desulfurization-side shut-off ram is set.
在锅炉侧关断闸板与脱硫侧关断闸板之间的加热管路上还设置有调节挡板。 An adjustment baffle is also arranged on the heating pipeline between the shut-off gate on the boiler side and the shut-off gate on the desulfurization side.
优点及效果： Advantages and effects :
本实用新型提供一种混合式GGH系统，主要包括炉膛、磨煤机、脱硫塔和空气预热器，空气预热器与炉膛及磨煤机相连，其特征在于：在空气预热器的出口一次热风和二次热风主风道上引加热管路接至脱硫塔出口静烟道内。 The utility model provides a hybrid GGH system, which mainly includes a furnace, a coal mill, a desulfurization tower and an air preheater, and the air preheater is connected with the furnace and the coal mill, and is characterized in that: The primary hot air and secondary hot air main air ducts lead up the heating pipelines to the static flue at the outlet of the desulfurization tower.
由于烟囱“石膏雨”产生的主要原因是烟气温度偏低，因此本实用新型采取有效措施对净烟气进行加热。 Because the main cause of "gypsum rain" in the chimney is the low flue gas temperature, the utility model takes effective measures to heat the clean flue gas.
本实用新型利用锅炉一、二次热风的裕量，从空气预热器后一、二次风主风道抽取一、二次热风，直接注入脱硫塔出口静烟道，在混合段内与脱硫出口低温净烟气混合，提升净烟气温度，从而提高烟囱排烟的抬升高度，同时减少烟道烟气结露积酸。 The utility model utilizes the margin of the primary and secondary hot air of the boiler to extract the primary and secondary hot air from the main air passage of the primary and secondary air behind the air preheater, directly inject the static flue at the outlet of the desulfurization tower, and mix with the desulfurization in the mixing section The low-temperature net flue gas at the outlet is mixed to increase the temperature of the net flue gas, thereby increasing the lifting height of the chimney exhaust, and reducing the condensation and acid accumulation of the flue gas.
本实用新型的改造方案实施后，可提高烟囱入口净烟气温度，消除烟囱“石膏雨”现象。 After the transformation scheme of the utility model is implemented, the temperature of the net flue gas at the inlet of the chimney can be increased, and the phenomenon of "gypsum rain" in the chimney can be eliminated.
本实用新型可计算的每年消耗成本及固定投资成本与其它治理措施比较相对较低，可以作为替代回转式GGH和其它加热装置，成为防止烟囱 “石膏雨”的可靠措施进行应用。 The annual consumption cost and fixed investment cost of the utility model are relatively low compared with other treatment measures, and can be used as a substitute for rotary GGH and other heating devices, and can be applied as a reliable measure to prevent "gypsum rain" in chimneys.
该方案与原有方案的技术比较：Technical comparison between this scheme and the original scheme:
附图说明：Description of drawings:
图1为本实用新型的结构示意框图； Fig. 1 is a structural schematic block diagram of the utility model;
图2为本实用新型的结构示意简图。 Fig. 2 is a schematic structural diagram of the utility model.
具体实施方式：下面结合附图对本实用新型做进一步的描述： The specific embodiment: the utility model is further described below in conjunction with the accompanying drawings:
如图1所示，本实用新型提供一种混合式GGH系统，主要包括现有的炉膛、磨煤机、脱硫塔和空气预热器，空气预热器与炉膛及磨煤机相连，本实用新型是在空气预热器出口的一次热风和二次热风主风道上引加热管路，将该加热管路接至脱硫塔出口静烟道内。 As shown in Figure 1, the utility model provides a hybrid GGH system, which mainly includes the existing furnace, coal mill, desulfurization tower and air preheater, and the air preheater is connected with the furnace and coal mill. The new type is to introduce heating pipelines on the primary hot air and secondary hot air main air ducts at the outlet of the air preheater, and connect the heating pipelines to the static flue at the outlet of the desulfurization tower.
加热管路上设置有引风机，用于将空气预热器出口的一次热风和二次热风引入脱硫塔出口静烟道内。 An induced draft fan is installed on the heating pipeline to introduce the primary hot air and secondary hot air from the outlet of the air preheater into the static flue at the outlet of the desulfurization tower.
在加热管路上靠近空气预热器出口的位置设置有锅炉侧关断闸板，在加热管路上靠近脱硫塔的位置设置有脱硫侧关断闸板。锅炉侧关断闸板和脱硫侧关断闸板用于随时将加热管路关断。 On the heating pipeline, close to the outlet of the air preheater, a boiler-side shut-off ram is set, and on the heating pipeline, close to the desulfurization tower, a desulfurization-side shut-off ram is set. The shut-off gate on the boiler side and the shut-off gate on the desulfurization side are used to shut off the heating pipeline at any time.
在锅炉侧关断闸板与脱硫侧关断闸板之间的加热管路上还设置有调节挡板。调节挡板是用来调节引入热风的风量从而控制热风的温度。 An adjustment baffle is also arranged on the heating pipeline between the shut-off gate on the boiler side and the shut-off gate on the desulfurization side. The regulating baffle is used to adjust the air volume of the hot air to control the temperature of the hot air.
本实用新型利用空气预热器出口一次热风和二次热风加热脱硫塔出口净烟气，确保在各种工况下烟囱的入口烟气温度不低于65～70℃，减少烟气中的酸性水滴在烟道、烟囱内产生酸腐蚀，同时增加烟囱出口烟气抬升高度，提高污染物的扩散度。 The utility model uses the primary hot air and secondary hot air at the outlet of the air preheater to heat the net flue gas at the outlet of the desulfurization tower, ensuring that the temperature of the flue gas at the inlet of the chimney is not lower than 65-70°C under various working conditions, and reduces the acidity in the flue gas. Water droplets cause acid corrosion in the flue and chimney, and at the same time increase the height of the flue gas at the chimney outlet and increase the diffusion of pollutants.
本实用新型的原理是利用锅炉空气预热器一次热风和二次热风的裕量，从空气空预器出口一次热风和二次热风的主风道抽取部分一次热风和二次热风，并将其引入脱硫塔出口静烟道内，直接对低温净烟气混合加热，提升净烟气温度，从而提高烟囱排烟的抬升高度，同时减少烟道烟气结露腐蚀。 The principle of the utility model is to use the margin of the primary hot air and secondary hot air of the boiler air preheater to extract part of the primary hot air and secondary hot air from the main air passage of the air air preheater outlet primary hot air and secondary hot air, and transfer them to Introduced into the static flue at the outlet of the desulfurization tower, it directly mixes and heats the low-temperature clean flue gas to increase the temperature of the clean flue gas, thereby increasing the lifting height of the chimney exhaust smoke, and at the same time reducing the flue gas condensation corrosion.
本实用新型施工工期短，大大降低了工程造价和运行成本，并对治理烟囱“石膏雨”有明显的效果。 The utility model has a short construction period, greatly reduces the construction cost and operating cost, and has obvious effects on controlling the "gypsum rain" of the chimney.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075740A (en) * | 2013-02-16 | 2013-05-01 | 盐城市兰丰环境工程科技有限公司 | Chimney white mist removal system and method |
| CN104819478A (en) * | 2015-04-22 | 2015-08-05 | 烟台创元热能科技有限公司 | Desulfuration system capable of keeping chimney warm by use of hot air |
| CN112344361A (en) * | 2020-10-30 | 2021-02-09 | 上海二十冶建设有限公司 | GGH flue gas heat exchanger installation method |
-
2011
- 2011-08-24 CN CN2011203095132U patent/CN202221098U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075740A (en) * | 2013-02-16 | 2013-05-01 | 盐城市兰丰环境工程科技有限公司 | Chimney white mist removal system and method |
| CN104819478A (en) * | 2015-04-22 | 2015-08-05 | 烟台创元热能科技有限公司 | Desulfuration system capable of keeping chimney warm by use of hot air |
| CN104819478B (en) * | 2015-04-22 | 2018-06-26 | 烟台创元热能科技有限公司 | A kind of desulphurization system using hot wind thermal-insulating chimney |
| CN112344361A (en) * | 2020-10-30 | 2021-02-09 | 上海二十冶建设有限公司 | GGH flue gas heat exchanger installation method |
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Address after: No. 49 Century Road, Hunnan New District, Shenyang City, Liaoning Province, 110000 Patentee after: China Power Investment Northeast Energy Technology Co., Ltd. Address before: 110181 No. 8, No. 2 Hunnan Road, Hunnan New District, Shenyang City, Liaoning Province Patentee before: CPI Northeast Energy-saving Technology Co.,Ltd. |
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Granted publication date: 20120516 |