CN105597513A - Flue gas desulfurizing and dust removing device of coal-fired boiler - Google Patents

Flue gas desulfurizing and dust removing device of coal-fired boiler Download PDF

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Publication number
CN105597513A
CN105597513A CN201610062018.3A CN201610062018A CN105597513A CN 105597513 A CN105597513 A CN 105597513A CN 201610062018 A CN201610062018 A CN 201610062018A CN 105597513 A CN105597513 A CN 105597513A
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CN
China
Prior art keywords
flue gas
communicated
washing
pipeline
demist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610062018.3A
Other languages
Chinese (zh)
Inventor
封晓飞
封彦彦
任耀卫
封二超
陈少舟
郝伟珍
李军梅
冉草原
王永艳
苏彦超
盖仲夏
刘晓建
李雷雷
郄会永
赵康
齐伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shijiazhuang Yu Qing Environmental Protection Technology Co Ltd
Original Assignee
Shijiazhuang Yu Qing Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shijiazhuang Yu Qing Environmental Protection Technology Co Ltd filed Critical Shijiazhuang Yu Qing Environmental Protection Technology Co Ltd
Priority to CN201610062018.3A priority Critical patent/CN105597513A/en
Publication of CN105597513A publication Critical patent/CN105597513A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of devices for separating particles from gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/12Methods and means for introducing reactants
    • B01D2259/124Liquid reactants

Abstract

The invention discloses a flue gas desulfurizing and dust removing device of a coal-fired boiler and belongs to the technical field of environment protection. The flue gas desulfurizing and dust removing device of the coal-fired boiler comprises a desulfurizing tower, a concentration and crystallization tank, a cleaning circulation water tank, an absorbing circulation pump, a washing concentration pump and a cleaning water pump. The function areas of a cleaning solution and an absorption solution are separated, and it is ensured that parameters of the solutions are effectively and flexibly adjusted. The flue gas desulfurizing and dust removing device is simple in structure, capable of saving energy, environmentally friendly and convenient to install, flue gas can be rapidly cooled, secondary dust removing can be achieved, the gas-liquid mass transfer rate is high, and deep removing of sulfur dioxide is achieved; the flue gas then enters a demisting device and a wet type electric demister, and deep removing of dust and mist drops is achieved. In the production running process, parameters of the solutions and fuel gas at all parts can be efficiently and flexibly adjusted, the device is provided with an independent tower and has the advantages of being efficient, high in adaptability, small in occupied area, easy and convenient to operate, and the like, and ultralow emission of the flue gas can be achieved in the single desulfurizing tower.

Description

Coal burning flue gas desulfurization dust arrester
Technical field
The present invention relates to coal burning flue gas desulfurization dust arrester, belong to environmental technology field.
Background technology
In the face of the raising of the requirement of enterprise pollution thing emission limit and discharge standard, need to carry out flue gas minimum discharge control at the desulfurizer that reduces discharging enterprise under weight. It is minimum discharge index that traditional ammonia process of desulfurization setting can not be controlled flue gas concentration, ammonia process desulfuration tower functional area is arranged as simple washing and absorbs flue gas, cleaning solution and absorption liquid mix, bad desulfurization effects, only have by increasing liquid-gas ratio and improving pH value and could improve desulfurized effect, but in improving desulfurized effect, increase escape ammonia, droplet and smoke content, finally still can not effectively arrive minimum discharge index, and operating flexibility has been poor.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of desulfation dust-extraction device that can realize flue gas minimum discharge, solve escape ammonia and the high problem of droplet content in flue gas simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of coal burning flue gas desulfurization dust arrester, comprises desulfurizing tower, wet type electrostatic precipitator, condensing crystallizing groove, clean cycle tank, absorbent recirculation pump, washing concentrating pump, flushing water pump; The inner tower base spacer of described desulfurizing tower is separated out absorption cycle groove, and absorption cycle groove 1 top is followed successively by oxidation panel, washing section, absorber portion, ammonia demist section, water droplet demist section; The desulfurizing tower sidewall of washing section is externally communicated with flue, and wet type electrostatic precipitator is arranged on water droplet demist section top, and chimney is positioned at wet type electrostatic precipitator top; Oxidation panel lower end arranges aeration tube, and aeration tube externally connects oxidation air pipe; Condensing crystallizing groove is communicated with the spray equipment of washing section upper end by pipeline, and the lower end of washing section is provided for collecting the inclined clapboard of cleaning solution, and the lower side of inclined clapboard is communicated with condensing crystallizing groove by pipeline; On the pipeline that is communicated with condensing crystallizing groove and washing section upper end spray equipment, washing concentrating pump is set; Absorption cycle groove lower end is communicated with the spray equipment of absorber portion upper end by absorbent recirculation pump and pipeline, and absorption cycle groove upper end is communicated with the catch tray of absorber portion lower end by pipeline; The pipeline that is communicated with absorption cycle groove upper end and absorber portion lower end catch tray also with ammoniacal liquor pipeline communication; The delivery port of clean cycle tank is communicated with the spray equipment of ammonia demist section by flushing water pump and pipeline, and the water inlet of clean cycle tank is communicated with the receipts liquid dish of the lower end of ammonia demist section.
Further, the absorber portion of described desulfurizing tower arranges three grades of absorption spray equipments that upper, middle and lower distributes successively.
Further, the ammonia demist section of described desulfurizing tower arranges the two-stage ammonia demister distributing up and down.
Further, the water droplet demist section of described desulfurizing tower arranges the two-stage water demister distributing up and down.
Further, on the chimney of described desulfurizing tower, online monitor is set.
Further, the top of the washing section showering washing device of described desulfurizing tower also comprises the anti-blocking spraying device for preventing that pore from stopping up.
Further, also comprise sulphur ammonium retracting device, described sulphur ammonium retracting device is communicated with condensing crystallizing groove by magma pump and pipeline.
Owing to having adopted technique scheme, the technological progress that the present invention obtains is:
The present invention separates cleaning solution and absorption liquid functional area, and both functions can be given full play to, and has improved the utilization rate of absorption liquid and cleaning solution.
The present invention has strengthened the ability of demist, is provided with two-stage ammonia demister and two-stage water droplet demister, can effectively remove ammonia mist and water smoke in flue gas.
The present invention separately controls each functional areas, can adjust flexibly each liquid and Gas Parameters, makes desulfurization and dedusting effect reach best.
The present invention is also provided with sulphur ammonium retracting device, pass through sulphur ammonium retracting device to realize recovery to ammonium sulfate, the ammonium sulfate of recovery is as chemical fertilizer, thereby realizes twice laid.
The present invention has installed on-line detector at chimney place, can monitor in real time the smoke components of chimney outlet by on-line detector, check desulfurization and dedusting effect, can adjust at any time the parameter of liquids and gases everywhere according to monitored data, to reach best gas cleaning effect. After testing by the present invention's sulfur dioxide in flue gas content after treatment below 35mg/Nm3, smoke content, below 5mg/Nm3, meets the standard of minimum discharge.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention;
Wherein, the 1st, absorption cycle groove, the 2nd, oxidation panel, the 3rd, washing section, the 4th, flue, the 5th, absorber portion, the 6th, ammonia demist section, the 7th, chimney, the 8th, water droplet demist section, the 9th, wet type electrostatic precipitator, the 10th, absorbent recirculation pump, the 11st, magma pump, the 12nd, aeration tube, the 13rd, sulphur ammonium retracting device, the 14th, washing concentrating pump, the 15th, flushing water pump, the 16th, clean cycle tank, the 17th, condensing crystallizing groove, the 18th, ammoniacal liquor pipeline.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further details:
As shown in Figure 1, be structural representation of the present invention. The present invention includes desulfurizing tower, condensing crystallizing groove 17, clean cycle tank 16, absorbent recirculation pump 10, washing concentrating pump 14, flushing water pump 15; Described desulfurizing tower inside is separated out absorption cycle groove 1 with dividing plate at the bottom of tower, absorption cycle groove 1 top is that oxidation panel 2 use separate with the dividing plate of hole, oxidation panel 2 tops are washing section 3, washing section 3 tops are absorber portion 5, absorber portion 5 tops are ammonia demist section 6, ammonia demist section 6 tops are water droplet demist section 8, and wet type electrostatic precipitator 9 is installed in water droplet demist section 8 tops, and wet type electrostatic precipitator 9 tops arrange chimney 7. The flue 4 of external connection is set on the desulfurizing tower sidewall of washing section 3, and oxidation panel 2 lower ends arrange aeration tube 12, and aeration tube 12 externally connects oxidation air pipe; Condensing crystallizing groove 17 is communicated with the spray equipment of washing section 3 upper ends by pipeline, and the lower end of washing section 3 is provided for collecting the inclined clapboard of cleaning solution, and the lower side of inclined clapboard is communicated with condensing crystallizing groove 17 by pipeline; On the pipeline that connects condensing crystallizing groove 17 and washing section 3 upper end spray equipments, washing concentrating pump 14 is set; Absorption cycle groove 1 lower end is communicated with the spray equipment of absorber portion 5 upper ends by absorbent recirculation pump 10 and pipeline, and absorption cycle groove 1 upper end is communicated with the catch tray of absorber portion 5 lower ends by pipeline; The pipeline that connects absorption cycle groove 1 upper end and absorber portion 5 lower end catch trays is also communicated with ammoniacal liquor pipeline 18; The delivery port of clean cycle tank 16 is communicated with the spray equipment of ammonia demist section 6 by flushing water pump 15 and pipeline, and the water inlet of clean cycle tank 16 is communicated with the receipts liquid dish of the lower end of ammonia demist section 6. The water of clean cycle tank 16 is delivered to ammonia demist section 6 by flushing water pump 15 by pipeline, water with flue gas contact action after fall to and receive liquid dish and then flow to clean cycle tank 16 by back of pipeline and recycle.
The present invention separates cleaning solution and absorption liquid functional area, and both functions can be given full play to like this, have improved the utilization rate of absorption liquid and cleaning solution, are convenient to control the parameter of absorption liquid and cleaning solution simultaneously, to reach best desulfurized effect.
In order to ensure the assimilation effect to sulfur dioxide in flue gas, at the absorber portion 5 of described desulfurizing tower, three grades of absorption spray equipments that upper, middle and lower distributes are successively set.
In order to guarantee to remove the escape ammonia in flue gas, the two-stage ammonia demister distributing is up and down set in the ammonia demist section 6 of described desulfurizing tower.
In order to ensure that flue gas is fully dried, described water droplet demist section 8 arranges the two-stage water demister distributing up and down.
The present invention arranges online monitor on the chimney 7 of described desulfurizing tower, can monitor in real time the smoke components in chimney 7 exits by on-line detector, check desulfurization and dedusting effect, can adjust at any time the parameter of liquids and gases everywhere according to monitored data, to reach best gas cleaning effect.
The present invention is provided for the anti-blocking spraying device that prevents that pore from stopping up above washing section 3 showering washing devices of described desulfurizing tower, cleans the ammonium sulfate crystal grain that is attached to passage by spray equipment spray solution.
The present invention is also provided with sulphur ammonium retracting device 13, and described sulphur ammonium retracting device 13 is connected with condensing crystallizing groove 17 by magma pump 11 and pipeline. The recovery that can realize ammonium sulfate by sulphur ammonium retracting device 13, the ammonium sulfate of recovery can be used as chemical fertilizer, thereby realizes twice laid.
When use, flue gas is introduced to washing section 3 from flue 4, the circulation of cleaning circulation pump 14 is passed through to flue gas spray washing liquid in washing section 3 upper ends, the composition of cleaning solution is ammonium sulfate, in spray process, flue-gas temperature declines, and ammonium sulfate enters condensing crystallizing groove 17 under the high temperature of flue gas after condensing crystallizing, described flue gas continues to rise and enters absorber portion 5, absorber portion 5 arranges three grades of absorption spray equipments, each spray equipment that absorbs is to flue gas spray-absorption liquid, liquid absorption element is mainly ammonium sulfite solution, ammonium sulfite solution reacts with the sulfur dioxide in flue gas and generates bisulfite ammonium salt solution, thereby sloughs the sulfur dioxide in flue gas, bisulfite ammonium salt solution flow to absorption cycle groove 1 through back of pipeline after dropping to catch tray, ammoniacal liquor injects absorption cycle groove 1 and reacts with bisulfite ammonia solution through ammoniacal liquor pipeline 18 and generates ammonium sulfite simultaneously, the ammonium sulfite solution of absorption cycle groove 1 upper end enters oxidation panel 2 through separator perforation, under the oxidation of oxygen, generate ammonium sulfate, when reaching after a certain amount of, ammonium sulfate overflows to condensing crystallizing groove 17, enter washing concentrating cyclic process, the sulfurous acid ammonia solution of absorption cycle groove 1 lower end is circulated to washing section 3 through cleaning circulation pump 14, enter wash cycle process. described flue gas continues to rise and enters ammonia demist section 6, can remove a small amount of ammonia of overflowing in absorption liquid in absorption process in this region, described ammonia demist section 6 arranges two-stage ammonia demister, by flushing water pump 15 by the water circulation in clean cycle tank 16 to ammonia demist section 6, contact through two-stage ammonia demister shower water the ammonia of removing in flue gas with flue gas, described flue gas continues to rise and enters water droplet demist section 8, and described water droplet demist section 8 arranges two-stage water droplet demister, can further remove the water smoke in flue gas, described flue gas continues to rise, and through the effect of wet type electrostatic precipitator 9, removes in flue gas also remaining a small amount of dust and water smoke, is then disposed to atmosphere through chimney 7.
The ammonium sulfite solution of producing in operative installations of the present invention, as absorption liquid, has reduced the use amount of ammoniacal liquor, thereby has reduced the content of the escape ammonia in flue gas, has ensured the clean-up effect of flue gas.
The features such as the present invention has efficiently, strong adaptability, floor space are little, easy and simple to handle, can realize in single desulfurizing tower that minimum discharge is collaborative administers. After testing by the present invention's sulfur dioxide in flue gas content after treatment at 35mg/Nm3Below, smoke content is at 5mg/Nm3Below, meet the standard of minimum discharge.

Claims (7)

1. a coal burning flue gas desulfurization dust arrester, is characterized in that: comprise desulfurizing tower, wet type electrostatic precipitator (9), condensing crystallizing groove (17), clean cycle tank (16), absorbent recirculation pump (10), washing concentrating pump (14), flushing water pump (15); At the bottom of the inner tower of described desulfurizing tower, be separated out absorption cycle groove (1) with dividing plate, absorption cycle groove (1) top is followed successively by oxidation panel (2), washing section (3), absorber portion (5), ammonia demist section (6), water droplet demist section (8); The desulfurizing tower sidewall of washing section (3) is externally communicated with flue (4), and wet type electrostatic precipitator (9) is arranged on water droplet demist section (8) top, and chimney (7) is positioned at wet type electrostatic precipitator (9) top; Oxidation panel (2) lower end arranges aeration tube (12), and aeration tube (12) externally connects oxidation air pipe; Condensing crystallizing groove (17) is communicated with the spray equipment of washing section (3) upper end by pipeline, and the lower end of washing section (3) is provided for collecting the inclined clapboard of cleaning solution, and the lower side of inclined clapboard is communicated with condensing crystallizing groove (17) by pipeline; On the pipeline that is communicated with condensing crystallizing groove (17) and washing section (3) upper end spray equipment, washing concentrating pump (14) is set; Absorption cycle groove (1) lower end is communicated with the spray equipment of absorber portion (5) upper end by absorbent recirculation pump (10) and pipeline, and absorption cycle groove (1) upper end is communicated with the catch tray of absorber portion (5) lower end by pipeline; The pipeline that is communicated with absorption cycle groove (1) upper end and absorber portion (5) lower end catch tray is also communicated with ammoniacal liquor pipeline (18); The delivery port of clean cycle tank (16) is communicated with the spray equipment of ammonia demist section (6) by flushing water pump (15) and pipeline, and the water inlet of clean cycle tank (16) is communicated with the receipts liquid dish of the lower end of ammonia demist section (6).
2. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: the absorber portion (5) of described desulfurizing tower arranges three grades of absorption spray equipments that upper, middle and lower distributes successively.
3. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: the ammonia demist section (6) of described desulfurizing tower arranges the two-stage ammonia demister distributing up and down.
4. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: the water droplet demist section (8) of described desulfurizing tower arranges the two-stage water demister distributing up and down.
5. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: on the chimney (7) of described desulfurizing tower, online monitor is set.
6. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: the top of washing section (3) showering washing device of described desulfurizing tower also comprises the anti-blocking spraying device for preventing that pore from stopping up.
7. coal burning flue gas desulfurization dust arrester according to claim 1, is characterized in that: also comprise sulphur ammonium retracting device (13), described sulphur ammonium retracting device (13) is communicated with condensing crystallizing groove (17) by magma pump (11) and pipeline.
CN201610062018.3A 2016-01-29 2016-01-29 Flue gas desulfurizing and dust removing device of coal-fired boiler Pending CN105597513A (en)

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CN107174938A (en) * 2017-07-11 2017-09-19 山东海新石油化工有限公司 A kind of desulfurizing tower

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Publication number Priority date Publication date Assignee Title
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CN107174938A (en) * 2017-07-11 2017-09-19 山东海新石油化工有限公司 A kind of desulfurizing tower

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Application publication date: 20160525