1. Consumption process

1.1烟气脱硫系统由下列主要子系统组成：

1.1 the flue gas desulfurization system is composed of the following main subsystems:

(1)烟气系统

(1) Flue gas system

(2)二氧化硫吸收系统

(2) Sulfur dioxide absorption system

(3)石灰石浆液制备系统

(3) Limestone slurry preparation system

(4)石膏脱水系统

(4) Gypsum dehydration system

(5)工艺水系统

(5) Process water system

(6)紧缩空气系统

(6) Compressed air system

(7)废水系统和浆液排空系统

(7) Waste water system and slurry emptying system

(8)电气及照明系统

(8) Electrical and lighting system

(9)控制系统

(9) Control system

(10)消防及火灾报警系统

(10) Fire fighting and fire alarm system

系统描绘

System description

烟气系统：烟气系统的主要功用是将由锅炉侧主烟道内的原烟气引入吸收塔，脱硫净化后的净烟气引入烟囱排放。

Flue gas system: the main function of the flue gas system is to introduce the raw flue gas from the main flue at the boiler side into the absorption tower, and the net flue gas after desulfurization and purification is introduced into the chimney for discharge.

吸收塔系统：烟气从吸收塔中下侧进入与上侧喷淋的石灰石浆液逆流接触，在塔内停止化学反响，对落入吸收塔浆池的反响物再停止氧化反响，得到脱硫副产品二水石膏。经吸收剂洗濯脱硫后的清洁烟气，经过除雾器除去雾滴后由吸收塔上侧引出，排入烟囱。

Absorption tower system: the flue gas enters from the lower side of the absorption tower and contacts with the limestone slurry sprayed on the upper side countercurrent, stops the chemical reaction in the tower, and stops the oxidation reaction on the reactants falling into the slurry pool of the absorption tower, so as to obtain the desulfurization by-product dihydrate gypsum. The clean flue gas washed with absorbent and desulfurized is led out from the upper side of the absorption tower and discharged into the chimney after the mist drops are removed by the demister.

石灰石浆液制备系统：粒径为325目（经过率大于90％）的石灰石粉由汽车泵送入石灰石粉仓，再经星形给料机由螺旋称重给料机保送到石灰石浆液箱内，在石灰石浆液箱中加水制成约20-30％的石灰石浆液，然后经石灰石浆液泵送*吸收塔。

Limestone slurry preparation system: limestone powder with a particle size of 325 mesh (passing rate greater than 90%) is pumped into the limestone powder silo by the car, and then transported to the limestone slurry tank by the spiral weighing feeder through the star feeder. Water is added into the limestone slurry tank to make about 20-30% limestone slurry, and then pumped to the absorption tower through the limestone slurry.

系统设两座钢制石灰石粉贮仓，贮仓的总容量按两台锅炉在BMCR工况下运转3天的石灰石粉耗量设计，有效容积为2*1100m3。每个石灰石粉仓设两个出料口，各对应1台星形给料机及一台螺旋称重给料机。

The system is equipped with two steel limestone powder silos. The total capacity of the silos is designed according to the limestone powder consumption of two boilers operating for 3 days under BMCR working condition, and the effective volume is 2*1100m3. Each limestone powder bin is equipped with two discharge ports, each corresponding to a star feeder and a spiral weighing feeder.

石灰石浆液箱的有效容积满足两台锅炉BMCR工况下6小时用量，有效容积为2*300m3。共设四台石灰石浆液泵，每个吸收塔两台，一运一备。两浆液箱间设联络管两侧制浆系统可互为备用。

The effective volume of limestone slurry tank meets the 6-hour consumption of two boilers under BMCR working condition, and the effective volume is 2*300m3. There are four limestone slurry pumps, two for each absorption tower, one for operation and one for standby. A connecting pipe is set between the two slurry tanks, and the pulping systems on both sides can be standby for each other.

工艺水系统：工艺水系统能满足FGD安装正常运转和事故工况下脱硫工艺系统的用水。工艺水系统可向下列设备供水：

Process water system: the process water system can meet the water consumption of FGD process system under normal operation and accident conditions of FGD installation. The process water system can supply water to the following equipment:

（1）吸收塔除雾器冲洗。

(1) Wash the demister of the absorption tower.

（2）石灰石制浆和吸收塔氧化风冷却及浆池液位调整。

(2) Limestone pulping and oxidation air cooling of absorption tower and liquid level adjustment of slurry pool.

（3）石膏及真空皮带脱水机冲洗。

(3) Wash gypsum and vacuum belt dehydrator.

（4）脱硫系统设备冷却、密封及管道冲洗。

(4) Equipment cooling, sealing and pipeline flushing of desulfurization system.

（5）其他用水。

(5) Other water.

工艺水系统为母管制，2台炉脱硫公用；工艺水泵按2*100％容量设计，除雾器冲洗水泵按3*100％容量设计。工艺水系统母管和除雾器冲洗水母管之间设有手动联络门，运转时开启进步了系统用水牢靠性。

The process water system is the main pipe, and the desulfurization of two boilers is common; The process water pump is designed as 2*100% capacity, and the demister flushing water pump is designed as 3*100% capacity. A manual connection door is set between the main pipe of the process water system and the flushing water main pipe of the demister, which is opened during operation to improve the reliability of the water used in the system.

石膏脱水及储存系统：吸收塔内的石膏浆液经过石膏浆液排出泵送入石膏浆液旋流器浓缩，浓缩后的石膏浆液自流***真空皮带脱水机停止脱水。脱水后外表含水率小于10％，纯度达90%以上的石膏送入石膏堆料间储存外运。

Gypsum dehydration and storage system: the gypsum slurry in the absorption tower is sent to the gypsum slurry cyclone for concentration through the gypsum slurry discharge pump, and the concentrated gypsum slurry flows by itself * * * the vacuum belt dehydrator stops dehydration. After dehydration, gypsum with a moisture content of less than 10% and a purity of more than 90% is sent to the gypsum stacking room for storage and outward transportation.

设两台真空皮带脱水机，每台出力按两台锅炉BMCR工况下燃用设计煤种时FGD石膏总产量的75％配置，出力为53.1t/h。

Two vacuum belt dehydrators are set, and the output of each one is configured according to 75% of the total output of FGD gypsum when two boilers burn design coal under BMCR working condition, with the output of 53.1t/h.

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