CN1193813C - Multi-stage liquid curtain spray washing flue gas desulfurizing deivce - Google Patents

Multi-stage liquid curtain spray washing flue gas desulfurizing deivce Download PDF

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Publication number
CN1193813C
CN1193813C CNB011322608A CN01132260A CN1193813C CN 1193813 C CN1193813 C CN 1193813C CN B011322608 A CNB011322608 A CN B011322608A CN 01132260 A CN01132260 A CN 01132260A CN 1193813 C CN1193813 C CN 1193813C
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CN
China
Prior art keywords
flue gas
staving
doctor solution
gas
desulfurizing
Prior art date
Application number
CNB011322608A
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Chinese (zh)
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CN1419953A (en
Inventor
潘卫国
Original Assignee
上海电力学院
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Publication date
Application filed by 上海电力学院 filed Critical 上海电力学院
Priority to CNB011322608A priority Critical patent/CN1193813C/en
Publication of CN1419953A publication Critical patent/CN1419953A/en
Application granted granted Critical
Publication of CN1193813C publication Critical patent/CN1193813C/en

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Abstract

The present invention relates to a flue gas desulfurizing device in a multi-stage liquid curtain spray washing type, which is characterized in that a multi-stage desulfurizing tower is positioned in a barrel body corresponding to all stages of desulfurizing solution spraying pipes. The desulfurizing tower can form an inner baffling structure through a lower baffling ring and a top cover, and the inner baffling structure can prevent the short circuit of flue gas and can enhance the mixing of gas and liquid. The lower baffling ring is connected with the top cover by a support frame, and a small baffling ring is positioned at the edge of the inner side of the lower baffling ring so that an overflow dam is formed; thereby, the mixed area of the gas and the liquid is increased. The device adopts a reverse structure of washing the flue gas from bottom to top and washing the desulfurizing solution from up to bottom, and the flue gas can flow and return between each baffling ring and the top cover, so that the turbulence of the flue gas and the mass transfer of the gas and the liquid are strengthened, the mixing effect is improved, and the utilization rate of a desulfurizing agent is enhanced.

Description

Multi-stage liquid curtain spray washing flue gas desulfurizing deivce
Technical field:
The present invention relates to the multi-stage liquid curtain spray washing flue gas desulfurizing deivce in a kind of flue gas desulfurization technique field.
Background technology:
Burning back desulfurization, promptly gas fume after burning desulfur technology (FGD) is current generally acknowledged most widely used, most effective desulfur technology, is the important means of control sulfur dioxide (SO2) emissions, air conservation, protection environment.For coal-burning boiler, FGD is control sulfur dioxide (SO 2) discharging main method.The most widely used at present but bigger wet flue gas desulfurizer of investment is to adopt doctor solution to spray step by step from top to down, flue gas vertical lifting from bottom to top mixes the device that reaches desulfurization with doctor solution, its shortcoming is the time weak point that doctor solution mixes with flue gas, and desulfuration efficiency is low.
Summary of the invention:
The objective of the invention is in order to overcome the shortcoming of prior art, provide a kind of small investment, operating cost is low, desulfuration efficiency is high and technology is easy to promote, to satisfy the multi-stage liquid curtain spray washing flue gas desulfurizing deivce of present stage to requirement on environmental protection.
Technical scheme of the present invention is that it comprises valve, circulating pump, the desulfurization liquid pool, run-off, flowmeter, control valve, the doctor solution input duct, the doctor solution reflux line, staving, doctor solution shower and smoke entrance, be characterized in staving being equipped with multistage desulfurizing tower with doctor solution showers at different levels are corresponding, desulfurizing tower adopts both can prevent the flue gas short circuit, the lower baffle ring and the top cover that can strengthen gas-liquid mixed are again formed the internal baffling type structure, connect by support between lower baffle ring and the top cover, be equipped with a little baffle ring to form downflow weir at the place, inside edge of lower baffle ring, flue gas enters the staving center by the gas approach of desulfurizing tower staving bottom, flue gas streams process from bottom to top respectively by lower baffle, the multistage exhaust gases passes that support and top cover are formed, in passing through the process of passage, with the doctor solution generation chemical reaction that from multi-layer desulfurization liquid shower, sprays, flue gas through sweetening process flows through staving top demist plate, is discharged by staving 9 upper end exhanst gas outlets at last; Doctor solution is squeezed into pipeline by the desulfurization liquid pool of building ground floor in through the circulating pump that is arranged in the next door, is taken up in order of priority through valve, doctor solution input duct and multilayer control valve, flowmeter; Doctor solution flows through reaction channel from top to bottom and flue gas carries out chemical reaction, enters desulfurizing tower staving bottom at last and enters run-off through bottom doctor solution reflux line, and liquid flows to into the desulfurization liquid pool in the run-off.
Owing to adopt lower baffle ring and top cover to form the internal baffling type structure in the desulfurizing tower, both can prevent the flue gas short circuit, can strengthen gas-liquid mixed again; Design one downflow weir and bottom hydrops layer have increased the gas-liquid mixed area on lower baffle ring; Tower body adopts the hierarchical composition design, helps the installation and the maintenance of desulfurizing tower, and is in operation and can selects for use at different levelsly flexibly, also is beneficial to transformation, renewal and the upgrading of system simultaneously; In this device flue gas and doctor solution be blended in adopt conventional flue gas from bottom to top, the top-down counter flow washing mode of doctor solution the time, be designed to flue gas Zigzag type tendency between baffle plate and the top cover, the turbulivity and the gas-liquid mass transfer of flue gas have been strengthened, strengthen mixed effect, improved the utilization rate of desulfurizing agent.
Description of drawings:
Fig. 1 is the desulfurizer structure chart;
Fig. 2 is the desulfurizing tower cut-away view.
The specific embodiment:
By shown in Figure 1, multi-stage liquid curtain spray washing flue gas desulfurizing deivce, comprise valve 4, circulating pump 3, desulfurization liquid pool 2, run-off 1, control valve 7, flowmeter 8, doctor solution input duct 5, doctor solution reflux line 16, staving 9, doctor solution shower 10 and gas approach 15, exhanst gas outlet 12, be characterized in staving 9 being equipped with multistage desulfurizing tower with multistage doctor solution shower 10 is corresponding, desulfurizing tower adopts both can prevent the flue gas short circuit, the lower baffle ring 6 and the top cover 11 that can strengthen gas-liquid mixed are again formed the internal baffling type structure, connect by support 14 between lower baffle ring 6 and the top cover 11, support 14 adopts the stainless steel band steel, for being easy to install and maintain and strengthening corrosion resistance, the junction all adopts stainless steel Luo silk to fix up and down.By shown in Figure 2, be equipped with a little baffle ring 17 to form downflow weir at the place, inside edge of lower baffle ring 6, just formed the dynamic liquid film of one deck at lower baffle ring like this, strengthened the contact area of flue gas and separation of flow liquid.Flue gas enters the staving center by the gas approach 15 of desulfurizing tower staving 9 bottoms, flue gas streams the multistage exhaust gases passes of forming through by lower baffle 6, support 14 and top cover 11 from bottom to top respectively, in passing through the process of passage, with the doctor solution generation chemical reaction that from multi-layer desulfurization liquid shower 10, sprays, flue gas through sweetening process flows through staving 9 top demist plates 13, is discharged by staving 9 upper end exhanst gas outlets 12 at last; Doctor solution is squeezed into pipeline by the desulfurization liquid pool 2 of building ground floor in through the circulating pump 3 that is arranged in the next door, is taken up in order of priority through valve 4, doctor solution input duct 5 and multilayer control valve 7, flowmeter 8; Doctor solution flows through reaction channel from top to bottom and flue gas carries out chemical reaction, enters desulfurizing tower staving bottom at last and enters run-off 1 through bottom doctor solution reflux line 16, and liquid flows to into desulfurization liquid pool 2 in the run-off 1.
Staving 9 adopts common drum, and its top is equipped with demist plate 13.Gas approach 15, exhanst gas outlet 12 place the bottom and the upper end of staving 9 respectively, and flue gas enters desulfurizing tower from the bottom, are desulfurized from bottom to top behind the liquid washing desulphurization to discharge from cat head in tower, through entering atmosphere after the deduster dedusting.Be configured to certain density doctor solution in desulfurization liquid pool 2, by circulating pump 3 doctor solution pumped into doctor solution pipeline 5, doctor solution shower 10 stretches in the tower, spray down after its anterior nozzle atomization, pass through the reflux line 16 at the bottom of the tower then, return run-off 1, in order to recycling.

Claims (2)

1, a kind of multi-stage liquid curtain spray washing flue gas desulfurizing deivce, it comprises valve (4), circulating pump (3), desulfurization liquid pool (2), run-off (1), control valve (7), flowmeter (8), doctor solution input duct (5), doctor solution reflux line (16), staving (9), doctor solution shower (10) and gas approach (15), exhanst gas outlet (12), it is characterized in that, in staving (9), be equipped with multistage desulfurizing tower with multistage doctor solution shower (10) is corresponding, desulfurizing tower adopts both can prevent the flue gas short circuit, the lower baffle ring (6) and the top cover (11) that can strengthen gas-liquid mixed are again formed the internal baffling type structure, connect by support (14) between lower baffle ring (6) and the top cover (11), be equipped with a little baffle ring (17) to form downflow weir at the place, inside edge of lower baffle ring (6), flue gas enters the staving center by the gas approach (15) of desulfurizing tower staving (9) bottom, flue gas streams process from bottom to top respectively by lower baffle (6), the multistage exhaust gases passes that support (14) and top cover (11) are formed, in passing through the process of passage, with the doctor solution generation chemical reaction that from multi-layer desulfurization liquid shower (10), sprays, flue gas through sweetening process flows through staving (9) top demist plate (13), is discharged by staving (9) upper end exhanst gas outlet (12) at last; Doctor solution is squeezed into pipeline by the desulfurization liquid pool (2) of building ground floor in through the circulating pump (3) that is arranged in the next door, is taken up in order of priority through valve (4), doctor solution input duct (5) and multilayer control valve (7), flowmeter (8); Doctor solution flows through reaction channel from top to bottom and flue gas carries out chemical reaction, enters desulfurizing tower staving bottom at last and enters run-off (1) through bottom doctor solution reflux line (16), and liquid flows to into desulfurization liquid pool (2) in the run-off (1).
2, multi-stage liquid curtain spray washing flue gas desulfurizing deivce according to claim 1, it is characterized in that, described staving (9) adopts common drum, and its top is equipped with demist plate (13), and gas approach (15), exhanst gas outlet (12) place the bottom and the upper end of staving (9) respectively.
CNB011322608A 2001-11-21 2001-11-21 Multi-stage liquid curtain spray washing flue gas desulfurizing deivce CN1193813C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB011322608A CN1193813C (en) 2001-11-21 2001-11-21 Multi-stage liquid curtain spray washing flue gas desulfurizing deivce

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB011322608A CN1193813C (en) 2001-11-21 2001-11-21 Multi-stage liquid curtain spray washing flue gas desulfurizing deivce

Publications (2)

Publication Number Publication Date
CN1419953A CN1419953A (en) 2003-05-28
CN1193813C true CN1193813C (en) 2005-03-23

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100351003C (en) * 2005-06-24 2007-11-28 哈尔滨工业大学 Internal circulating multistaged spray fluidized flue gas desulfurization tower
TR201809457T4 (en) * 2010-12-10 2018-07-23 General Electric Technology Gmbh A wet scrubber with diverter plates and a method for cleaning a process gas.
CN102921279B (en) * 2012-10-25 2015-01-28 四川皇龙智能破碎技术股份有限公司 Gas desulfurization tower with multi-layers of spraying structures

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Owner name: HUADONG RESEARCH INST OF ELECTRIC POWER EXPERIMEN

Free format text: FORMER OWNER: SHANGHAI ELECTRIC POWER COLLEGE

Effective date: 20080912

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20080912

Address after: 171 Handan Road, Shanghai, zip code: 200437

Co-patentee after: Shanghai University of Electric Power

Patentee after: East China electric power test and Research Institute Co., Ltd.

Address before: No. 2103, Pingliang Road, Shanghai, China: 200090

Patentee before: Shanghai University of Electric Power