CN207871900U - A kind of flue-gas dust-removing and desulfurization purification system - Google Patents
A kind of flue-gas dust-removing and desulfurization purification system Download PDFInfo
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- CN207871900U CN207871900U CN201820074846.3U CN201820074846U CN207871900U CN 207871900 U CN207871900 U CN 207871900U CN 201820074846 U CN201820074846 U CN 201820074846U CN 207871900 U CN207871900 U CN 207871900U
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- 239000003546 flue gas Substances 0.000 title claims abstract description 104
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 79
- 230000023556 desulfurization Effects 0.000 title claims abstract description 79
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 96
- 238000011084 recovery Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000006028 limestone Substances 0.000 claims abstract description 17
- 235000019738 Limestone Nutrition 0.000 claims abstract description 16
- 239000006227 byproduct Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000006228 supernatant Substances 0.000 claims abstract description 4
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000003500 flue dust Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003009 desulfurizing effect Effects 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- -1 sprayer Substances 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型涉及大气污染控制领域，特别是涉及一种烟气除尘脱硫净化系统。The utility model relates to the field of air pollution control, in particular to a flue gas dust removal, desulfurization and purification system.
背景技术Background technique
我国是世界上最大的煤炭生产国和消费国，也是世界上仅有的几个以煤为主要能源的国家之一。我国煤炭的特点是灰分高，含硫量大，因此在火力发电和锅炉燃烧后所排出的烟气中含有大量的粉尘和二氧化硫(SO2)等有害气体，这些有害气体所造成的环境问题日益严重。国家环境保护部下发的《火电厂大气污染物排放标准》(GB13223-2011)和《环境空气质量标准》(GB3095-2012)，明确对SO2、颗粒物等有害气体的排放限值做了规定，加大了对环境的保护力度。my country is the largest coal producer and consumer in the world, and one of the few countries in the world where coal is the main energy source. my country's coal is characterized by high ash content and high sulfur content. Therefore, the flue gas discharged from thermal power generation and boiler combustion contains a large amount of harmful gases such as dust and sulfur dioxide (SO2). The environmental problems caused by these harmful gases are becoming more and more serious. . The "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011) and "Ambient Air Quality Standards" (GB3095-2012) issued by the Ministry of Environmental Protection clearly stipulate the emission limits of harmful gases such as SO2 and particulate matter. Increased protection of the environment.
随着SO2、颗粒物排放标准要求的提高，对烟气净化处理装置性能提出了更严格的要求，但目前的烟气脱硫净化装置脱硫效果差，结构复杂，脱硫剂利用率不高，脱硫成本昂贵。例如中国发明专利CN106110866A(申请号：201610643747.8)公布了一种烟气脱硫系统，虽然也可以达到烟气脱硫的目的，但是该发明没有涉及对原烟气进行预处理，会使脱硫效果相对较差，而且脱硫剂和脱硫副产物得不到高效地利用，从而脱硫成本也会大大增加。With the improvement of SO2 and particulate matter emission standards, more stringent requirements are put forward for the performance of flue gas purification treatment devices. However, the current flue gas desulfurization purification device has poor desulfurization effect, complex structure, low utilization rate of desulfurizer, and high desulfurization cost. . For example, the Chinese invention patent CN106110866A (application number: 201610643747.8) discloses a flue gas desulfurization system. Although it can also achieve the purpose of flue gas desulfurization, the invention does not involve pretreatment of the original flue gas, which will make the desulfurization effect relatively poor , and the desulfurization agent and desulfurization by-products cannot be used efficiently, so the cost of desulfurization will also increase greatly.
实用新型内容Utility model content
本实用新型的目的在于提供一种集烟气除尘、脱硫和净化于一体，结构简单，脱硫剂利用率高，运行方便，脱硫成本低的高效烟气除尘脱硫净化系统，以克服现有技术的不足。The purpose of the utility model is to provide a high-efficiency flue gas dust removal, desulfurization and purification system integrating flue gas dust removal, desulfurization and purification, simple structure, high utilization rate of desulfurization agent, convenient operation, and low desulfurization cost, so as to overcome the disadvantages of the prior art insufficient.
为解决上述问题，本实用新型采用如下技术方案：In order to solve the above problems, the utility model adopts the following technical solutions:
一种烟气除尘脱硫净化系统包括烟气预处理系统、喷淋除硫系统、浆液供给系统和浆液回收系统，所述的烟气预处理系统、浆液供给系统和浆液回收系统均与喷淋除硫系统连接，另外浆液回收系统同时还与浆液供给系统连接。A flue gas dedusting and desulfurization purification system includes a flue gas pretreatment system, a spray desulfurization system, a slurry supply system and a slurry recovery system. The sulfur system is connected, and the slurry recovery system is also connected with the slurry supply system.
进一步的，所述的喷淋除硫系统包括烟气脱硫塔和循环泵；所述的烟气脱硫塔顶部设有排气管，烟气脱硫塔内部从上到下依次设有吸附层、除雾器、喷淋器、烟气入口和浆液储槽；所述的浆液储槽分为上下两层，循环泵进水端与浆液储槽下层连通，出水端与喷淋器连通。Further, the spray desulfurization system includes a flue gas desulfurization tower and a circulation pump; the top of the flue gas desulfurization tower is provided with an exhaust pipe, and the interior of the flue gas desulfurization tower is sequentially provided with an adsorption layer, a desulfurization Mist, sprayer, flue gas inlet and slurry storage tank; the slurry storage tank is divided into upper and lower layers, the water inlet end of the circulation pump is connected to the lower layer of the slurry storage tank, and the water outlet is connected to the sprayer.
进一步的，所述的吸附层的吸附材料内层为活性炭纤维，用于去除净烟气中的味道。Further, the inner layer of the adsorption material of the adsorption layer is activated carbon fiber, which is used to remove the smell in the clean flue gas.
进一步的，所述的喷淋器由多个360°自动旋转喷头构成，有利于脱硫剂与含硫烟气的充分接触，提高脱硫效率。Further, the sprinkler is composed of a plurality of 360° automatic rotating nozzles, which is conducive to the full contact between the desulfurization agent and the sulfur-containing flue gas, and improves the desulfurization efficiency.
进一步的，所述的除雾器为金属丝网或折流板式结构，用于拦截随气流带走的液滴，使其回流到烟气脱硫塔中。Further, the demister is a wire mesh or baffle plate structure, which is used to intercept the liquid droplets carried away by the airflow and return them to the flue gas desulfurization tower.
进一步的，所述的烟气预处理系统包括依次连接的初级烟尘过滤箱、静电除尘箱、风机和烟气流量计，通过烟气管道与烟气脱硫塔上的烟气入口连接，通过物理过滤和静电吸附的方式对原烟气进行净化。Further, the flue gas pretreatment system includes a primary soot filter box, an electrostatic precipitator box, a fan and a flue gas flow meter connected in sequence, connected to the flue gas inlet on the flue gas desulfurization tower through a flue gas pipeline, and through physical filtration Purify the raw flue gas by means of electrostatic adsorption.
进一步的，所述的浆液供给系统包括依次连接的石灰石粉仓、给料机、制浆罐、浆液池和供给泵，供给泵的出口连接到浆液储槽下层。Further, the slurry supply system includes a limestone powder bin, a feeder, a slurry tank, a slurry pool and a supply pump connected in sequence, and the outlet of the supply pump is connected to the lower layer of the slurry storage tank.
进一步的，所述的给料机为螺旋称重给料机，可以有效控制进入石灰石粉的量。Further, the feeder is a screw weighing feeder, which can effectively control the amount of limestone powder entering.
进一步的，所述的浆液回收系统包括依次连接的排出泵、缓冲罐、脱水机和传送泵，排出泵入口与浆液储槽上层连接，传送泵出口与制浆罐连接。Further, the slurry recovery system includes a discharge pump, a buffer tank, a dehydrator and a transfer pump connected in sequence, the inlet of the discharge pump is connected to the upper layer of the slurry storage tank, and the outlet of the transfer pump is connected to the slurry tank.
根据本实用新型，一种烟气除尘脱硫净化系统的运行步骤，包括如下：浆液供给系统中的供给泵将浆液池内的石灰石浆液输送到喷淋除硫系统中烟气脱硫塔的浆液储槽下层内，再通过循环泵将石灰石浆液抽到喷淋器中。同时，原烟气在烟气预处理系统中风机的动力下依次经过初级除尘过滤箱和静电除尘箱，烟气管道上设有烟气流量计用于控制进入烟气脱硫塔的烟气量，烟气通过烟气入口进入到烟气脱硫塔中，与喷射出的石灰石浆液充分混合。反应后得到净化的烟气和副产物浆液，副产物浆液返回烟气脱硫塔的浆液储槽上层内，并通过浆液回收系统中排出泵排出经过滤后上清液返回浆液供给系统中的制浆罐再次利用，石膏经脱水后制成石膏产品；净化后的烟气则上升进入除雾器内除雾，除雾后的净烟气流经吸附层通过烟气脱硫塔顶部的排气管排放到大气中。According to the utility model, the operating steps of a flue gas dedusting, desulfurization and purification system include the following: the supply pump in the slurry supply system transports the limestone slurry in the slurry pool to the lower layer of the slurry storage tank of the flue gas desulfurization tower in the spray desulfurization system Inside, the limestone slurry is pumped into the sprinkler by a circulating pump. At the same time, under the power of the fan in the flue gas pretreatment system, the raw flue gas passes through the primary dust removal filter box and the electrostatic dust removal box in sequence. A flue gas flow meter is installed on the flue gas pipe to control the amount of flue gas entering the flue gas desulfurization tower. The flue gas enters the flue gas desulfurization tower through the flue gas inlet, and is fully mixed with the injected limestone slurry. After the reaction, the purified flue gas and by-product slurry are obtained, and the by-product slurry is returned to the upper layer of the slurry storage tank of the flue gas desulfurization tower, and the filtered supernatant is discharged through the discharge pump in the slurry recovery system and returned to the pulping in the slurry supply system The tank is reused, and the gypsum is dehydrated to make gypsum products; the purified flue gas rises into the demister for demisting, and the clean flue gas after demisting flows through the adsorption layer and is discharged through the exhaust pipe at the top of the flue gas desulfurization tower to the atmosphere.
本实用新型的有益效果为：The beneficial effects of the utility model are:
1、通过物理过滤和静电吸附的方式多次过滤烟气中的粗、细颗粒粉尘，使烟气得到了较好的净化，增强了脱硫效果；1. Through physical filtration and electrostatic adsorption, the coarse and fine particle dust in the flue gas is filtered many times, so that the flue gas is better purified and the desulfurization effect is enhanced;
2、喷淋器通过管道与浆液储槽连通，脱硫剂在烟气脱硫塔内循化流动，降低了脱硫成本，提高了脱硫效率；2. The sprayer is connected with the slurry storage tank through the pipeline, and the desulfurization agent circulates in the flue gas desulfurization tower, which reduces the desulfurization cost and improves the desulfurization efficiency;
3、石灰石配浆时不需要大量添加水，一定程度上节约了水资源；3. There is no need to add a lot of water when mixing limestone slurry, which saves water resources to a certain extent;
4、设备操作简单，维护方便，副产物可被有效利用，有效保护了环境。4. The equipment is easy to operate, easy to maintain, and the by-products can be effectively used to effectively protect the environment.
附图说明Description of drawings
图1为本实用新型一种烟气除尘脱硫净化系统结构示意图。Fig. 1 is a schematic structural diagram of a flue gas dedusting, desulfurization and purification system of the present invention.
1-烟气预处理系统，11-初级除尘过滤箱，12-静电除尘箱，13-风机，14-烟气流量计，2-喷淋除硫系统，21-烟气脱硫塔，22-排气管，23-吸附层，24-除雾器，25-喷淋器，26-循环泵，27-浆液储槽，28-烟气入口，3-浆液供给系统，31-石灰石粉仓，32-给料机，33-制浆罐，34-浆液池，35-供给泵，4-浆液回收系统，41-传送泵，42-脱水机，43-缓冲罐，44-排出泵。1-flue gas pretreatment system, 11-primary dust removal filter box, 12-electrostatic dust removal box, 13-fan, 14-flue gas flow meter, 2-spray desulfurization system, 21-flue gas desulfurization tower, 22-row Air pipe, 23-adsorption layer, 24-demister, 25-sprayer, 26-circulation pump, 27-slurry storage tank, 28-flue gas inlet, 3-slurry supply system, 31-limestone powder bin, 32 -feeder, 33-slurry tank, 34-slurry tank, 35-supply pump, 4-slurry recovery system, 41-transfer pump, 42-dehydrator, 43-buffer tank, 44-discharge pump.
具体实施方式Detailed ways
现结合附图通过以下实施方式来对本实用新型的具体过程加以说明。The specific process of the present utility model will now be described through the following embodiments in conjunction with the accompanying drawings.
如图1所示，一种烟气除尘脱硫净化系统，石灰石浆液作为脱硫剂，该系统包括烟气预处理系统1、喷淋除硫系统2、浆液供给系统3和浆液回收系统4，烟气预处理系统1、浆液供给系统3和浆液回收系统4均与喷淋除硫系统2连接，另外浆液回收系统4同时还与浆液供给系统3连接。As shown in Figure 1, a flue gas dedusting, desulfurization and purification system uses limestone slurry as a desulfurizing agent. The system includes a flue gas pretreatment system 1, a spray desulfurization system 2, a slurry supply system 3, and a slurry recovery system 4. The pretreatment system 1 , the slurry supply system 3 and the slurry recovery system 4 are all connected to the spray desulfurization system 2 , and the slurry recovery system 4 is also connected to the slurry supply system 3 at the same time.
喷淋除硫系统2包括烟气脱硫塔21和循环泵26；烟气脱硫塔21顶部设有排气管22，内部从上到下依次设有吸附层23、除雾器24、喷淋器25、烟气入口28和浆液储槽27；浆液储槽27分为上下两层，循环泵26进水端与浆液储槽27下层连通，出水端与喷淋器25连通；吸附层23的吸附材料内层为活性炭纤维，用于去除净烟气中的味道；喷淋器25由多个360°自动旋转喷头构成，有利于脱硫剂与含硫烟气的充分接触，提高脱硫效率；除雾器24为金属丝网或折流板式结构，用于拦截随气流带走的液滴，使其回流到烟气脱硫塔21中。The spray desulfurization system 2 includes a flue gas desulfurization tower 21 and a circulation pump 26; the top of the flue gas desulfurization tower 21 is provided with an exhaust pipe 22, and the interior is sequentially provided with an adsorption layer 23, a demister 24, and a sprayer from top to bottom. 25. The flue gas inlet 28 and the slurry storage tank 27; the slurry storage tank 27 is divided into upper and lower layers, the water inlet of the circulation pump 26 is connected to the lower layer of the slurry storage tank 27, and the water outlet is connected to the sprayer 25; the adsorption of the adsorption layer 23 The inner layer of the material is activated carbon fiber, which is used to remove the smell in the clean flue gas; the sprinkler 25 is composed of multiple 360° automatic rotating nozzles, which is conducive to the full contact between the desulfurizer and the sulfur-containing flue gas, and improves the desulfurization efficiency; defogging The device 24 is a wire mesh or baffle plate structure, and is used to intercept the liquid droplets carried away by the air flow, and make it return to the flue gas desulfurization tower 21 .
烟气预处理系统1包括依次连接的初级烟尘过滤箱11、静电除尘箱12、风机13和烟气流量计14，通过烟气管道与烟气脱硫塔上的烟气入口28连接。The flue gas pretreatment system 1 includes a primary flue dust filter box 11, an electrostatic precipitator box 12, a fan 13 and a flue gas flow meter 14 connected in sequence, and is connected to the flue gas inlet 28 on the flue gas desulfurization tower through a flue gas pipe.
浆液供给系统3包括依次连接的石灰石粉仓31、给料机32、制浆罐33、浆液池34和供给泵35，供给泵35的出口连接到浆液储槽27下层；给料机32为螺旋称重给料机，可以有效控制进入石灰石粉的量。The slurry supply system 3 includes a limestone powder bin 31, a feeder 32, a slurry tank 33, a slurry pool 34 and a supply pump 35 connected in sequence, and the outlet of the supply pump 35 is connected to the lower layer of the slurry storage tank 27; the feeder 32 is a screw Weighing feeder can effectively control the amount of limestone powder entering.
浆液回收系统4包括依次连接的排出泵44、缓冲罐43、脱水机42和传送泵41，排出泵44入口与浆液储槽27上层连接，传送泵41出口与制浆罐33连接。The slurry recovery system 4 includes a discharge pump 44, a buffer tank 43, a dehydrator 42 and a transfer pump 41 connected in sequence. The inlet of the discharge pump 44 is connected to the upper layer of the slurry storage tank 27, and the outlet of the transfer pump 41 is connected to the slurry tank 33.
一种烟气除尘脱硫净化系统的运行步骤，包括如下：浆液供给系统3中的供给泵35将浆液池34内的石灰石浆液输送到喷淋除硫系统2中烟气脱硫塔的浆液储槽27下层内，再通过循环泵26将石灰石浆液抽到喷淋器25中。同时，原烟气在烟气预处理系统1中风机13的动力下依次经过初级除尘过滤箱11和静电除尘箱12，烟气管道上设有烟气流量计14用于控制进入烟气脱硫塔21的烟气量，烟气通过烟气入口28进入到烟气脱硫塔21中，与喷射出的石灰石浆液充分混合。反应后得到净化的烟气和副产物浆液，副产物浆液返回烟气脱硫塔的浆液储槽27上层内，并通过浆液回收系统4中排出泵44排出经过滤后上清液返回浆液供给系统3中的制浆罐33再次利用，石膏经脱水后制成石膏产品；净化后的烟气则上升进入除雾器24内除雾，除雾后的净烟气流经吸附层23通过烟气脱硫塔21顶部的排气管22排放到大气中。The operation steps of a flue gas dedusting and desulfurization purification system include the following steps: the supply pump 35 in the slurry supply system 3 transports the limestone slurry in the slurry pool 34 to the slurry storage tank 27 of the flue gas desulfurization tower in the spray desulfurization system 2 In the lower layer, the limestone slurry is pumped into the sprinkler 25 through the circulating pump 26 . At the same time, the raw flue gas passes through the primary dust removal filter box 11 and the electrostatic dust removal box 12 in turn under the power of the fan 13 in the flue gas pretreatment system 1, and a flue gas flow meter 14 is installed on the flue gas pipeline to control the flow into the flue gas desulfurization tower. 21, the flue gas enters the flue gas desulfurization tower 21 through the flue gas inlet 28, and is fully mixed with the injected limestone slurry. After the reaction, purified flue gas and by-product slurry are obtained, and the by-product slurry is returned to the upper layer of the slurry storage tank 27 of the flue gas desulfurization tower, and the filtered supernatant is discharged through the discharge pump 44 in the slurry recovery system 4 and returned to the slurry supply system 3 The slurry tank 33 in the tank is reused, and the gypsum is dehydrated to make gypsum products; the purified flue gas rises into the demister 24 for demisting, and the demisted net flue gas flows through the adsorption layer 23 to pass through the flue gas desulfurization process. An exhaust pipe 22 at the top of the tower 21 vents to the atmosphere.
以上实施方案仅用于说明而非限制本实用新型的技术方案。不脱离本实用新型的任何修改或局部替换，均应覆盖在本实用新型的权利要求范围当中。The above embodiments are only used for illustration and not for limiting the technical solutions of the present utility model. Any modification or partial replacement that does not depart from the utility model shall be covered by the claims of the utility model.
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| CN110938739A (en) * | 2019-12-09 | 2020-03-31 | 郑州宏东实业有限公司 | A heat treatment equipment with recyclable waste heat |
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| CN107998865A (en) * | 2018-01-17 | 2018-05-08 | 青岛科技大学 | A kind of flue-gas dust-removing and desulfurization cleaning system |
| CN110938739A (en) * | 2019-12-09 | 2020-03-31 | 郑州宏东实业有限公司 | A heat treatment equipment with recyclable waste heat |
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