CN101099918A - Absorption tower flue gas direct discharge process - Google Patents

Absorption tower flue gas direct discharge process Download PDF

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Publication number
CN101099918A
CN101099918A CNA200710078583XA CN200710078583A CN101099918A CN 101099918 A CN101099918 A CN 101099918A CN A200710078583X A CNA200710078583X A CN A200710078583XA CN 200710078583 A CN200710078583 A CN 200710078583A CN 101099918 A CN101099918 A CN 101099918A
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absorption tower
flue gas
chimney
tower
absorption
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CNA200710078583XA
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CN100486673C (en
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杜云贵
洪燕
刘艺
李锐
刘清才
罗晓渝
廖帆
余宇
彭期耀
王强
黄锐
刘爽
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Chongqing University
CPI Yuanda Environmental Protection Engineering Co Ltd
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Chongqing University
CPI Yuanda Environmental Protection Engineering Co Ltd
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Abstract

本发明公开了一种吸收塔烟气直排工艺由如下步骤组成:步骤1,设置吸收塔(2),吸收塔(2)上端重叠烟囱(3),且与吸收塔(2)内腔相通,并形成一个整体;步骤2,制作石灰石浆液;步骤3,SO2烟气的吸收;整个系统脱硫率达到96%。本发明省去了烟囱、烟气热交换器和原来用于连接烟囱和吸收塔的烟道和接口,降低了烟气的系统阻力,大大降低初投资,节约建造和维护费,减少了运行费用。

The invention discloses a flue gas direct discharge process of an absorption tower, which is composed of the following steps: step 1, an absorption tower (2) is installed, the upper end of the absorption tower (2) overlaps a chimney (3), and communicates with the inner cavity of the absorption tower (2) , and form a whole; step 2, making limestone slurry; step 3, absorbing SO 2 flue gas; the desulfurization rate of the whole system reaches 96%. The invention saves the chimney, the flue gas heat exchanger, the flue and the interface originally used to connect the chimney and the absorption tower, reduces the system resistance of the flue gas, greatly reduces the initial investment, saves construction and maintenance costs, and reduces operating costs .

Description

Adsorption tower smoke directly ventilating technology
Technical field
The invention belongs to the flue gas desulfurization field, specifically, relate to a kind of fume emission technology.
Background technology
Along with the strictness day by day of China's Air Pollution Prevention Law rule, the flue gas in power station boiler desulfurization is imperative, and flue gas desulfurization technique is promotion and application promptly.Present domestic operation and in the desulfurizer of building, wet desulphurization accounts for more than 90%, and the flue gas after the wet desulphurization is mostly by smoke stack emission, chimney is the discharging modes of a kind of high investment, high flow rate, maximum discharge, difficult circulation, poor efficiency, therefore, in wet desulfurization system, select the fume emission mode to take all factors into consideration from aspects such as environmental protection, economy and technology.
Flue gas promotes SO in the flue gas by the cooling of flue gas heat exchange device after the booster fan pressurization 2Absorption, enter the absorption tower through flue then, chimney and absorption tower split design are come out from the upper end on absorption tower through the clean flue gas after the desulfurization of absorption tower, heat of the corrosion of alleviation low temperature saturated flue gas again through the flue gas heat exchange device, discharge from chimney through flue at last chimney.
Its shortcoming is: floor space is big, and some reconstruction unit can't adopt owing to the space is limited; Because chimney is than higher, it is many to build the required raw material of chimney, and will do corresponding anti-corrosion measure, so the chimney cost is very high.
Summary of the invention
The purpose of this invention is to provide a kind of adsorption tower smoke directly ventilating technology.
The object of the present invention is achieved like this:
Step 1, the absorption tower is set, the overlapping chimney in absorption tower upper end, and communicate with the absorption tower inner chamber, and form an integral body, this chimney top is cylinder, the bottom is cone, and this cone larger diameter end is connected and equal diameters with cylindrical absorbent cat head end, and bottom, described absorption tower is provided with the demist layer for oxidation pond, top, this demist layer below is provided with spraying layer, offers into mouth at the absorption tower sidewall between oxidation pond and spraying layer;
Step 2 is made lime stone slurry, and configuration lime stone slurry concentration is 30~40%, and lime stone slurry pH is alkalescence about 8-10, and the temperature of lime stone slurry is a room temperature, then lime stone slurry is delivered to the oxidation pond on absorption tower;
Step 3, SO 2The absorption of flue gas, other booster fan and the circulating pump of being provided with on described absorption tower, wherein booster fan is communicated with the mouth that advances on absorption tower by pipeline, circulating pump connects the spraying layer other end by pipeline one end and stretches in the oxidation pond on absorption tower, after being boosted by booster fan, directly advances in the people absorption tower flue gas, slurries in the absorption tower are delivered to tower top spraying layer by circulating pump from the oxidation pond of bottom, absorption tower, slurries atomize through spraying layer, atomization slurry passes through the absorption tower from top to bottom, with advance the flue gas adverse current that mouth comes in from absorption tower bottom and contact concurrent biochemical reaction, flow to the oxidation pond of bottom, absorption tower behind the generation calcium sulfite, flue gas upwards directly enters atmosphere from chimney along the absorption tower after desulfurizing and purifying is removed water smoke.
The adsorption tower smoke directly ventilating technology that the integrated design that the present invention adopts chimney to build the top, absorption tower in forms reduces flue and bend setting, reduces the flue gas system resistance, reduces crushing, reduces the booster fan energy consumption simultaneously, reduces cost of investment and operating cost expense.Build chimney in the absorption tower top, absorption tower body (about 30 meters high) can be used as the part of chimney, directly builds chimney material and cost such as anticorrosion that chimney just can be saved 30 meters height at the top, absorption tower, reduction desulfurization project cost; This technology can be saved traditional flue gas heat exchange device, reduces huge cost of equipment and has also saved operating cost simultaneously; The integrated design of chimney being built in the top, absorption tower can reduce system's floor space, overcome the reality of land used anxiety, particularly especially practical for some old unit reconstruction projects, because all there is the situation of insufficient space in many old units, also brought convenience simultaneously for technological improvement; The desulfuration efficiency of the adsorption tower smoke directly ventilating technology that the integrated design that the present invention adopts chimney to build the top, absorption tower in forms can be up to 96%.
The present invention compared with prior art has following beneficial effect:
1, reduces flue and bend setting, reduce the flue gas system resistance, reduce crushing, reduce the booster fan energy consumption simultaneously, reduce cost of investment and operating cost expense.
2, save the investment of flue gas heat exchange apparatus, and operating cost.
3, need not to establish in addition flue and connect chimney, reduce settings such as flue connector.
4, the required floor space of whole system is little, has saved the chimney expenditure of construction of 30 meters height simultaneously.
5, desulfuration efficiency height, desulfurization degree can reach more than 96%.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
The specific embodiment
One power plant, exhaust gas volumn is 1,150,000 Nm 3/ h; Import SO 2Content is 980mg/Nm 3The Ca/s ratio is 1.025, and desulfurization degree reaches 96%; The chimney height of building the top, absorption tower in is about 120m.Whole process step is as follows:
Step 1, absorption tower 2 is set, the overlapping chimney 3 in 2 upper ends, absorption tower, and communicate with absorption tower 2 inner chambers, and form an integral body, these chimney 3 tops are cylinder, the bottom is cone, and this cone larger diameter end is connected and equal diameters with cylindrical absorbent tower 2 tops, and 2 bottoms, described absorption tower are that oxidation pond 2b, top are provided with demist layer 2d, this demist layer 2d below is provided with spraying layer 2c, offers into mouth 2a at absorption tower 2 sidewalls that are positioned between oxidation pond 2b and the spraying layer (2c);
Step 2 is made lime stone slurry, and configuration lime stone slurry concentration is 37%, and lime stone slurry pH is alkalescence about 9, and the temperature of lime stone slurry is a room temperature, then lime stone slurry is pumped into the oxidation pond 2b on absorption tower 2;
Step 3, SO 2The absorption of flue gas, at described absorption tower 2 other booster fan 1 and the circulating pumps 4 of being provided with, wherein booster fan 1 is communicated with the mouth 2a that advances on absorption tower 2 by pipeline, circulating pump 4 connects the spraying layer 2c other end by pipeline one end and stretches in the oxidation pond 2b on absorption tower 2, flue gas directly advances in the people absorption tower 2 after being boosted by booster fan 1, slurries in the absorption tower 2 are delivered to tower top spraying layer 2c by the oxidation pond 2b of circulating pump 42 bottoms from the absorption tower, slurries atomize through spraying layer 2c, atomization slurry is from top to bottom by absorption tower 2, with from the absorption tower 2 bottoms advance the flue gas adverse current that mouth 2a comes in and contact concurrent biochemical reaction, generate the oxidation pond 2b that flows to 2 bottoms, absorption tower behind the calcium sulfite, flue gas 2 upwards directly enters atmosphere from chimney 3 along the absorption tower after desulfurizing and purifying is removed water smoke.The whole system desulfurization degree reaches 96%, and the flue gas system resistance is littler, reduces the booster fan energy consumption simultaneously, reduces cost of investment and operating cost expense.

Claims (1)

1、一种吸收塔烟气直排工艺,其特征在于,所述吸收塔烟气直排工艺按如下步骤进行:1, a kind of absorption tower flue gas direct discharge process is characterized in that, described absorption tower flue gas direct discharge process is carried out as follows: 步骤1,设置吸收塔(2),吸收塔(2)上端重叠烟囱(3),且与吸收塔(2)内腔相通,并形成一个整体,该烟囱(3)上部呈圆柱体,下部呈圆锥体,该圆锥体大直径端与圆柱形吸收塔(2)顶端连接且直径相等,所述吸收塔(2)底部为氧化池(2b)、上部设置除雾层(2d),该除雾层(2d)下方设有喷淋层(2c),在位于氧化池(2b)和喷淋层(2c)之间的吸收塔(2)侧壁开设进烟口(2a);Step 1, install the absorption tower (2), the upper end of the absorption tower (2) overlaps the chimney (3), and communicates with the inner cavity of the absorption tower (2), and forms a whole, the upper part of the chimney (3) is cylindrical, and the lower part is Cone, the large-diameter end of the cone is connected to the top of the cylindrical absorption tower (2) and has the same diameter. The bottom of the absorption tower (2) is an oxidation pool (2b), and the upper part is provided with a demister layer (2d). A spray layer (2c) is provided below the layer (2d), and a smoke inlet (2a) is provided on the side wall of the absorption tower (2) between the oxidation tank (2b) and the spray layer (2c); 步骤2,制作石灰石浆液,配置石灰石浆液浓度为30~40%,石灰石浆液pH呈碱性在8-10左右,石灰石浆液的温度为室温,然后将石灰石浆液送至吸收塔(2)的氧化池(2b);Step 2, make limestone slurry, configure the concentration of limestone slurry to be 30-40%, the pH of limestone slurry is alkaline at about 8-10, the temperature of limestone slurry is room temperature, and then send the limestone slurry to the oxidation pond of the absorption tower (2) (2b); 步骤3,SO2烟气的吸收,在所述吸收塔(2)旁设置增压风机(1)和循环泵(4),其中增压风机(1)通过管道与吸收塔(2)的进烟口(2a)连通,循环泵(4)通过管道一端连接喷淋层(2c)另一端伸入吸收塔(2)的氧化池(2b)内;烟气由增压风机(1)升压后直接进人吸收塔(2)内,吸收塔(2)内的浆液通过循环泵(4)从吸收塔(2)底部的氧化池(2b)送至塔上部喷淋层(2c),浆液经喷淋层(2c)雾化,雾化浆液自上而下通过吸收塔(2),与从吸收塔(2)底部进烟口(2a)进来的烟气逆流接触并发生化学反应,生成亚硫酸钙后流进吸收塔(2)底部的氧化池(2b),烟气经脱硫净化除去水雾后沿吸收塔(2)向上直接从烟囱(3)排入大气。Step 3, SO The absorption of flue gas, a booster fan (1) and a circulation pump (4) are set beside the absorption tower (2), wherein the booster fan (1) passes through the inlet of the absorption tower (2) through a pipeline. The smoke port (2a) is connected, and the circulation pump (4) is connected to the spray layer (2c) through one end of the pipeline and the other end extends into the oxidation pool (2b) of the absorption tower (2); the flue gas is boosted by the booster fan (1) After that, it directly enters the absorption tower (2), and the slurry in the absorption tower (2) is sent to the upper spray layer (2c) of the tower from the oxidation tank (2b) at the bottom of the absorption tower (2) by a circulating pump (4). Atomized by the spray layer (2c), the atomized slurry passes through the absorption tower (2) from top to bottom, and countercurrently contacts with the flue gas coming in from the smoke inlet (2a) at the bottom of the absorption tower (2) and undergoes a chemical reaction to form The calcium sulfite flows into the oxidation pond (2b) at the bottom of the absorption tower (2), and the flue gas is desulfurized and purified to remove water mist, and then goes upward along the absorption tower (2) and is directly discharged into the atmosphere from the chimney (3).
CNB200710078583XA 2007-06-06 2007-06-06 Adsorption tower smoke directly ventilating technology Active CN100486673C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101732950A (en) * 2008-11-20 2010-06-16 张建云 Waste gas recovering device
CN101601963B (en) * 2009-06-02 2012-07-04 张蕊 Smoke purification system and method thereof
CN103721545A (en) * 2013-12-30 2014-04-16 陕西大唐新能电力设计有限公司 Boiler smoke processing method
CN104353350A (en) * 2014-12-02 2015-02-18 成都华西堂投资有限公司 Smoke purification technology implemented based on adsorbent pretreatment
CN104383797A (en) * 2014-12-02 2015-03-04 成都华西堂投资有限公司 Dry-wet purifying recovery treatment process of smoke gas
CN104399368A (en) * 2014-12-02 2015-03-11 成都华西堂投资有限公司 Flue gas injection conveying technology for achieving absorbent pretreatment in flue gas purification method
CN105944544A (en) * 2016-07-13 2016-09-21 北京华福工程有限公司 Petrochemical acidic tail gas treatment system
CN107940492A (en) * 2017-12-07 2018-04-20 天津华赛尔传热设备有限公司 A kind of white absorption tower that disappears of heating agent circulation
CN108686495A (en) * 2018-06-21 2018-10-23 佛山赛因迪环保科技有限公司 A kind of smoke processing system for ceramic industry
CN110013741A (en) * 2019-05-15 2019-07-16 山东洲星生物技术有限公司 A kind of sulfur method using flue desulfurization assembling module

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CN1220545C (en) * 2002-10-22 2005-09-28 熊天渝 Washing system for adding magnesia lime/lime rock for removing SO2 and producing gypsum simultaneously
CN2761251Y (en) * 2005-01-14 2006-03-01 浙江大学 Smoke desulfurization device using underflow bialkali method
CN2813074Y (en) * 2005-08-16 2006-09-06 孙克勤 Gypsum slurry dewatering device in wet-process flue gas desulfurizing system
CN2894808Y (en) * 2006-03-30 2007-05-02 国电科技环保集团有限公司 Double circulation loop limestone/lime-gypsum wet flue gas desulfurization device
CN100435910C (en) * 2006-04-10 2008-11-26 广州市天赐三和环保工程有限公司 Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus
CN100503009C (en) * 2006-08-18 2009-06-24 浙江天蓝脱硫除尘有限公司 Enhanced lime flue gas desulfurization process

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101732950A (en) * 2008-11-20 2010-06-16 张建云 Waste gas recovering device
CN101601963B (en) * 2009-06-02 2012-07-04 张蕊 Smoke purification system and method thereof
CN103721545A (en) * 2013-12-30 2014-04-16 陕西大唐新能电力设计有限公司 Boiler smoke processing method
CN104353350A (en) * 2014-12-02 2015-02-18 成都华西堂投资有限公司 Smoke purification technology implemented based on adsorbent pretreatment
CN104383797A (en) * 2014-12-02 2015-03-04 成都华西堂投资有限公司 Dry-wet purifying recovery treatment process of smoke gas
CN104399368A (en) * 2014-12-02 2015-03-11 成都华西堂投资有限公司 Flue gas injection conveying technology for achieving absorbent pretreatment in flue gas purification method
CN104353350B (en) * 2014-12-02 2016-08-24 成都华西堂投资有限公司 The flue gas purifying technique realized based on absorbent pretreatment
CN104399368B (en) * 2014-12-02 2016-09-14 成都华西堂投资有限公司 Flue gas purifying method realizes the flue gas injection conveying technique of absorbent pretreatment
CN105944544A (en) * 2016-07-13 2016-09-21 北京华福工程有限公司 Petrochemical acidic tail gas treatment system
CN107940492A (en) * 2017-12-07 2018-04-20 天津华赛尔传热设备有限公司 A kind of white absorption tower that disappears of heating agent circulation
CN108686495A (en) * 2018-06-21 2018-10-23 佛山赛因迪环保科技有限公司 A kind of smoke processing system for ceramic industry
CN110013741A (en) * 2019-05-15 2019-07-16 山东洲星生物技术有限公司 A kind of sulfur method using flue desulfurization assembling module
CN110013741B (en) * 2019-05-15 2021-08-24 山东洲星生物技术有限公司 Desulfurization method for flue desulfurization assembled module

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