CN205019942U - Compound phase transition dust removal and desulfurization device of flue gas - Google Patents

Compound phase transition dust removal and desulfurization device of flue gas Download PDF

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Publication number
CN205019942U
CN205019942U CN201520714820.7U CN201520714820U CN205019942U CN 205019942 U CN205019942 U CN 205019942U CN 201520714820 U CN201520714820 U CN 201520714820U CN 205019942 U CN205019942 U CN 205019942U
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CN
China
Prior art keywords
flue gas
desulfurizing tower
desulfurating
phase
dust
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CN201520714820.7U
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Chinese (zh)
Inventor
纳宏波
江浩
白云峰
单选户
初炜
马志刚
郭少鹏
刘洋
陈雪
王德俊
韩玉维
刘亚
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北京国能中电节能环保技术有限责任公司
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Priority to CN201520714820.7U priority Critical patent/CN205019942U/en
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Abstract

The utility model discloses a compound phase transition dust removal and desulfurization device of flue gas, the device includes desulfurizing tower (10), the lateral wall sub -unit connection of desulfurizing tower (10) has entry flue (11), lateral wall upper portion is connected with exhaust pass (12), be provided with vortex phase transition ware (13) on entry flue (11) of desulfurizing tower (10), vortex phase transition ware (13) is including multiunit atomizing nozzle (18), multiunit atomizing nozzle (18) symmetry sets up on the lateral wall of entry flue (11), and the inside of the opening direction of atomizing nozzle (18) orientation entry flue (11) and for entry flue (11) eccentric settings, multiunit atomizing nozzle (18) spun shower water in the vortex phase transition ware (13) can make the flue gas in the entry flue (11) take place the whirl. The utility model discloses utilize compound phase transition to condense the principle and make the supersaturation aqueous vapor at fine particle thing surface condensation, improved the arresting efficiency of desulfurizing tower to the fine particle thing.

Description

Flue gas composite phase-change dust-removing desulfurating apparatus

Technical field

The utility model relates to technical field of air pollution control, be specifically related to a kind of can the desulfurized dust collection column technology and equipment of simultaneously efficient desulfurizing and dust collecting integration, be applicable to the improvement of the industrial smoke pollutants such as thermal power plant, Industrial Stoves, coal-burning boiler.

Background technology

At present, coal-burning boiler soot emissions are emphasis of Air Pollution Control.The major pollutants of coal-burning boiler flue dust are particle, S0 2, NO xdeng.Wherein, Particulate Pollution especially fine particle be the main arch-criminal of air " haze ".These fine particles float on overhead, city for a long time, not only have a strong impact on atmospheric visibility, but also multiple pollutant (as Hg, As, Pb and two English etc.) can be adsorbed, these particles are also the important catalyst that photochemical fog occurs simultaneously, the health of the serious harm mankind.

New " emission standard of air pollutants for boilers " (GB13271-2013) promulgates and urban d evelopment Emission Concentration of Boiller Dust reduces to 20mg/Nm 3below, ultra-clean discharge requires 5mg/Nm especially 3below, existing boiler smoke dedusting technology has been difficult to reach requirement, and new technical matters must be taked to improve the efficiency of dust collection of boiler smoke.The existing technique utilizing phase transformation condensation technique to improve efficiency of dust collection mainly adopts heat convection technique, namely before or after desulfurizing tower, convection recuperator is increased, reduce flue-gas temperature, improve water saturation degree, make the hydrone in flue gas from gaseous state cohesion for liquid, and in fine particle surface condensation, increase the particle diameter of particle, improve the removal efficiency of particle.

Take heat convection technology to reach the object regulating flue gas moisture content, also there are some problems in such technique: the saturation degree improving moisture in flue gas by reducing flue-gas temperature that 1) heat convection can only be simple, limited to the saturation degree adjustable range of moisture in flue gas, in some special boiler exhaust gas, moisture is on the low side, depend merely on reduction temperature to be difficult to moisture is reached capacity, range of application is limited; 2) heat convection is taked to reduce the cooling limited efficacy of flue-gas temperature, heat exchange efficiency because of technique for this reason is not only subject to the impact of low-temperature receiver character, heat-transfer surface properties of materials also has a strong impact on the cooling extent of flue gas simultaneously, the heat exchange efficiency of conventional heat transfer material is not high, reach higher water saturation degree, low-temperature receiver consumption is larger; 3) material requirements of heat convection temperature reduction technology heat exchanging is higher, not only require the higher coefficient of heat transfer, and require higher wear-resisting and decay resistance, when being especially arranged in after desulfurizing tower, flue-gas temperature is lower, the danger of cold end corrosion is higher, need adopt special material, equipment cost and construction costs higher.

Utility model content

The purpose of this utility model is to provide one to utilize composite phase-change condensation principle to make supersaturation aqueous vapor in fine particle surface condensation, impel the effects such as dust-laden drop collides, coalescence, make fine particle particle size growth in flue gas, improve desulfurizing tower to the flue gas composite phase-change dust-removing desulfurating apparatus of the arresting efficiency of fine particle.

For achieving the above object, the concrete technical scheme of a kind of flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model is:

A kind of flue gas composite phase-change dust-removing desulfurating apparatus, comprise desulfurizing tower, the lower sidewall of desulfurizing tower is connected with gas approach, side wall upper part is connected with exhaust pass, the gas approach of desulfurizing tower is provided with vortex phase transformation device, vortex phase transformation device comprises organizes atomizer more, many groups atomizer is symmetricly set on the sidewall of gas approach, and the opening direction of atomizer towards gas approach inside and relative to gas approach eccentric setting, the shower water of many groups atomizer in vortex phase transformation device ejection can make the flue gas generation eddy flow in gas approach.

The advantage of flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model is:

1) process equipment is simple, and invest little, workload is little, and the duration is short, is more suitable for the transformation of existing desulfurizing tower;

2) compared to conventional convection heat exchange condensation process, in this technique, flue gas can be directly humidified while cooling, and condensate moisture phase transformation effect is more obvious;

3) spray flux of vortex phase transformation device and spray angles adjustable, wider to water saturation degree adjustable range in flue gas, also stronger to the adaptability of flue gas characteristic, compound, run and control more flexibility and reliability;

4) consumption of cooling-water is few, and SR increase is very little, and performance driving economy is better, and equipment for ease of maintenaince;

5) process equipment integration is strong, easily coordinates wet electrical dust precipitator, realizes the minimum discharge of flue gas.

Accompanying drawing explanation

Fig. 1 is the structural representation of flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model;

Fig. 2 is the structural representation of the vortex phase transformation device in the utility model.

Detailed description of the invention

In order to better understand the purpose of this utility model, structure and function, below in conjunction with accompanying drawing, further detailed description is done to a kind of flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model.

As depicted in figs. 1 and 2, flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model comprises desulfurizing tower 10, and the lower sidewall of desulfurizing tower 10 is connected with gas approach 11, and side wall upper part is connected with exhaust pass 12.Wherein, the gas approach 11 of desulfurizing tower 10 is provided with vortex phase transformation device 13, vortex phase transformation device 13 is connected with filtered water tank 14 by clarified water pump.

Further, vortex phase transformation device 13 comprises many group atomizers 18, many groups atomizer 18 is symmetricly set on the sidewall of gas approach 11, and the opening direction of atomizer 18 towards gas approach 11 inside and relative to gas approach 11 eccentric setting, the shower water that many groups atomizer 18 in vortex phase transformation device 13 sprays can make the flue gas generation eddy flow in gas approach 11.In addition, it should be noted, the vortex phase transformation device 13 in the utility model can design and installation in the gas approach 11 of desulfurizing tower 10, original accident spraying layer also can be utilized to reequip.

Further, the opening direction of the atomizer 18 in vortex phase transformation device 13 is preferably 5-30 degree relative to the eccentric angle of gas approach 11, and the angle of pre-spray flux and nozzle bias can be regulated according to the change of unit load, flue gas characteristic, maintain the stable of flue gas eddy flow degree and saturation degree with this.In addition, in the present embodiment, the atomizer 18 in vortex phase transformation device 13 is preferably single-phase high voltage nozzle or two-phase high pressure nozzle, and high-pressure atomization nozzle can improve the atomizing effect of cooling water, to ensure the decreasing temperature and increasing humidity of flue gas.

Thus, flue gas produces eddy flow under the effect of symmetrical eccentric high pressure shower water, promotion high-temperature flue gas contacts mixing with low-temperature atomizing water, heat transfer between strengthening gas-liquid two-phase and mass transport process, simultaneously the eddy flow of flue gas cause phase transformation to separate out little dust-laden drop between collision and coalescence, growing up further of promotion dust-laden size droplet diameter.

Further, the bottom of desulfurizing tower 10 is provided with slurry pool 15.Wherein, agitating device and oxidation unit is provided with in slurry pool 15, it should be noted, the agitating device in the utility model can be selected but be not limited to side-feeding mixer or jacking stirrer, and air oxidation device can be selected but be not limited to the oxidation of distribution tubular type or oxidation gun-type oxidation unit.

Further, the middle part of desulfurizing tower 10 is provided with desulfurization spraying layer 16.Wherein, desulfurization spraying layer 16 is arranged in above slurry pool 15, is made up of Mechanical nozzle, and is connected with slurry pool 15 by slush pump.In addition, it should be noted, the desulfurization spraying layer 16 in the utility model can be arranged according to exhaust gas volumn and desulfuration efficiency multilayer, also can increase auxiliary spraying layer, reduce " escape of limit wall ", improve desulfurization dust-removing efficiency.

Further, the top of desulfurizing tower 10 is provided with high efficiency demister 17.Wherein, high efficiency demister 17 is connected with filtered water tank 14 by clarified water pump, it should be noted, the high efficiency demister such as tubular demister, board-like demister, ridge demister, fiber are board-like, bed or any combination formula demister can be adopted in the utility model, to improve demisting efficiency.

Further, according to efficiency of dust collection and discharge index, the exhaust pass 12 of desulfurizing tower 10 directly can connect chimney, so that neat stress is directly passed through smoke stack emission.Or the exhaust pass 12 of desulfurizing tower 10 also can connect the equipment such as wet electrical dust precipitator, with further meticulous dedusting, realize the minimum discharge of flue gas.

Referring to Fig. 1 and Fig. 2, the course of work of flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model is described:

First, the former flue gas of high temperature is after gas approach 11 is introduced, the cooling water effect that vertical eccentric first in vortex phase transformation device 13 sprays into, flue gas produces eddy flow under the effect of symmetrical eccentric high pressure cooling water, promotion high-temperature flue gas contacts mixing with low-temperature atomizing water, heat transfer between strengthening gas-liquid two-phase and mass transport process, flue gas cool-down humidification reaches capacity, and steam phase transformation is separated out on fine particle surface and formed little dust-laden drop; Simultaneously the eddy flow of flue gas causes collision between little dust-laden drop and coalescence, promotes growing up further of dust-laden size droplet diameter.

Then, the flue gas carrying dust-laden drop continues to enter desulfurizing tower 10, contacts with desulfurization slurry is reverse in desulfurization spraying layer district, and while desulfurization, the dust-laden drop of part Large stone is desulfurized slurries trapping and removes.Flue-gas temperature through desulfurization spraying layer 16 continues to reduce, the saturation degree of the moisture in flue gas continues to improve, and moisture continues phase transformation and separates out, and dust-laden size droplet diameter continues to increase, after high efficiency demister 17, be also removed by the small size particle that drop wraps up while dust-laden drop is blocked.

Finally, the neat stress after desulfurization and dedusting enters subsequent wet electric cleaner through the exhaust pass 12 of desulfurizing tower 10 and carries out meticulous dedusting, or directly enters chimney and arrange outward.

Flue gas composite phase-change dust-removing desulfurating apparatus of the present utility model sets up vortex phase transformation device at the gas approach of desulfurizing tower, mixed heat transfer is carried out by the water at low temperature and high-temperature flue gas that spray into atomization, while flue-gas temperature reduces, gaseous state is become mutually as after the atomized water heat absorption of low-temperature receiver, directly can improve the content of moisture in flue gas, flue-gas temperature can be reduced like this, improve the absolute moisture content of flue gas simultaneously, significantly can increase the saturation degree of moisture in flue gas, promote that in flue gas, vaporous water is that nucleus condensation phase transformation is separated out with fine particle, increase particle diameter and the quality of particle, raising desulfurizing tower and subsequent technique are to the arresting efficiency of fine particle.

By specific embodiment, the utility model is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to essence of the present utility model and scope; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the utility model is protected after reading this specification.

Claims (8)

1. a flue gas composite phase-change dust-removing desulfurating apparatus, comprise desulfurizing tower (10), the lower sidewall of desulfurizing tower (10) is connected with gas approach (11), side wall upper part is connected with exhaust pass (12), it is characterized in that, the gas approach (11) of desulfurizing tower (10) is provided with vortex phase transformation device (13), vortex phase transformation device (13) comprises organizes atomizer (18) more, organize atomizer (18) is symmetricly set on the sidewall of gas approach (11) more, and the opening direction of atomizer (18) towards gas approach (11) inside and relative to gas approach (11) eccentric setting, the shower water that many groups atomizer (18) in vortex phase transformation device (13) sprays can make the flue gas generation eddy flow in gas approach (11).
2. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 1, it is characterized in that, the opening direction of the atomizer (18) in vortex phase transformation device (13) is 5-30 degree relative to the eccentric angle of gas approach (11).
3. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 2, it is characterized in that, atomizer (18) in vortex phase transformation device (13) is single-phase high voltage nozzle or two-phase high pressure nozzle, and is connected with filtered water tank (14) by clarified water pump.
4. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 1, is characterized in that, the bottom of desulfurizing tower (10) is provided with slurry pool (15), and slurry pool is provided with agitating device and oxidation unit in (15).
5. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 4, it is characterized in that, the middle part of desulfurizing tower (10) is provided with desulfurization spraying layer (16), and desulfurization spraying layer (16) is connected with slurry pool (15) by slush pump.
6. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 5, it is characterized in that, the top of desulfurizing tower (10) is provided with high efficiency demister (17), and high efficiency demister (17) is connected with filtered water tank (14) by clarified water pump.
7. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 6, is characterized in that, the exhaust pass (12) of desulfurizing tower (10) is connected with chimney, directly to be discharged by flue gas.
8. flue gas composite phase-change dust-removing desulfurating apparatus according to claim 6, is characterized in that, the exhaust pass (12) of desulfurizing tower (10) is connected with wet electrical dust precipitator, to carry out meticulous dedusting to flue gas.
CN201520714820.7U 2015-09-15 2015-09-15 Compound phase transition dust removal and desulfurization device of flue gas CN205019942U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105107365A (en) * 2015-09-15 2015-12-02 北京国能中电节能环保技术有限责任公司 Flue gas composite phase change dust removal and desulfurization technology and device
CN105999942A (en) * 2016-06-27 2016-10-12 黄宇松 Dust removal device for industrial waste gas before purification treatment
CN107469609A (en) * 2017-09-06 2017-12-15 杭州小橙工业设计有限公司 A kind of full-automatic desulphurization system
CN108355444A (en) * 2018-03-20 2018-08-03 苏州市协力环保设备有限公司 A kind of industry of artificial boards drying exhaust gas treating method and its processing equipment
CN108939755A (en) * 2018-06-01 2018-12-07 东南大学 Ship tail gas desulfurizer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105107365A (en) * 2015-09-15 2015-12-02 北京国能中电节能环保技术有限责任公司 Flue gas composite phase change dust removal and desulfurization technology and device
CN105107365B (en) * 2015-09-15 2018-01-02 北京国能中电节能环保技术有限责任公司 Flue gas composite phase-change dust-removing and desulfurization process and device
CN105999942A (en) * 2016-06-27 2016-10-12 黄宇松 Dust removal device for industrial waste gas before purification treatment
CN105999942B (en) * 2016-06-27 2017-12-01 广州敦诚润宇环保工程有限公司 A kind of dust arrester of industrial waste gas before purified treatment
CN107469609A (en) * 2017-09-06 2017-12-15 杭州小橙工业设计有限公司 A kind of full-automatic desulphurization system
CN108355444A (en) * 2018-03-20 2018-08-03 苏州市协力环保设备有限公司 A kind of industry of artificial boards drying exhaust gas treating method and its processing equipment
CN108939755A (en) * 2018-06-01 2018-12-07 东南大学 Ship tail gas desulfurizer

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Address after: 100020, AB, 8 floor, ocean Guanghua International Center, No. 10 Jin Tong West Road, Beijing, Chaoyang District

Patentee after: Beijing CPCEP Energy Conservation and Environmental Protection Technology Co., Ltd.

Address before: 100020, AB, 8 floor, ocean Guanghua International Center, No. 10 Jin Tong West Road, Beijing, Chaoyang District

Patentee before: Beijing Guoneng Zhongdian Energy-Saving Environmental Protection Technology Co., Ltd.