CN101391172A - Safety device of absorbing tower liquid-level in wet-method flue gas desulfurization system - Google Patents
Safety device of absorbing tower liquid-level in wet-method flue gas desulfurization system Download PDFInfo
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- CN101391172A CN101391172A CNA2007100462265A CN200710046226A CN101391172A CN 101391172 A CN101391172 A CN 101391172A CN A2007100462265 A CNA2007100462265 A CN A2007100462265A CN 200710046226 A CN200710046226 A CN 200710046226A CN 101391172 A CN101391172 A CN 101391172A
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- liquid level
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- flue gas
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Abstract
The invention discloses a liquid level safety device of an absorption tower in a wet-process flue gas desulfurization system of a coal burning boiler. During the running of the absorption tower, the liquid level in the absorption tower is automatically controlled, but during the debugging or running of the device, the liquid level of the absorption tower rises due to factors such as blockage, the liquid even flows into a draught fan from a flue gas pipeline, thereby seriously influencing the running of a flue gas damper at the inlet of the draught fan and causing unsafe hidden danger, in order to prevent the conditions from happening, the liquid level safety device is arranged in the absorption tower to limit the highest liquid level in the tower and ensure the stable running of the device. The liquid level safety device is composed of an overflow port (A), a fluid flow pipe (B) and a water seal tank (C).
Description
Technical field
The safety device of absorbing tower liquid-level in the wet method fume desulfurizing system that the present invention proposes has important function to the safe operation of desulfurizer, therefore when setting up the FGD Design of device and installing, has practical value.
Background technology
The FGD device is in order to reduce SO
2Discharging, the protection environment is set up, and is in service at FGD because various factors may make absorbing tower liquid-level out of control, for example:
1) the tower export pipeline stops up;
2) positive displacement pump is waited to repair or is malfunctioning;
3) automatic control level measurement meter and alarm are malfunctioning.
Thereby can make liquid level out of control, and cause the into interruption of service of absorption tower baffle door and smoke induced draught fan, therefore limiting the highest liquid level in absorption tower is the important measures of safe operation, and the safety device of absorbing tower liquid-level is set for this reason.
Summary of the invention
This technology has been adopted for guaranteeing stable operation in absorption tower in the FGD device.
In sweetening process, contain flue dust, desulfurizing agent such as agstone slurries, milk of lime slurries, magnesia slurries etc. in the flue gas and all contain certain solid, being in operation is easy to deposition, and the desulfurizing agent of calcic can generate CaSO simultaneously
31/2H
2O, CaSO
42H
2O.Fouling in the absorption tower, thereby can cause pipeline blockage, absorbing tower liquid-level is risen, if operation is improper, can cause doctor solution to blow back into air-introduced machine, and have a strong impact on the operation of air-introduced machine, also influence the normal operation of tower import baffle door from flue, the liquid level safety device is set for this reason, the highest liquid level in restriction absorption tower.
The liquid level safety device is to be made of overfall, fluid flow tube, water sealed tank.When liquid level is higher than overfall, water sealed tank is gone in liquid (absorbent) overflow in the tower, by pump desulfurizing agent is sent to treatment system.When liquid level is lower than overfall, prevent overflowing of flue gas by water seal, water seal height h is 100-200mm, is equivalent to flue gas pressures 1000-2000Pa.
Absorbing at the bottom of the Tata between the highest liquid level and minimum liquid level, regulate by robot control system(RCS).
Liquid level safety device design main points are:
1) during overflow, flow rate of liquid is got 0.2-0.5m/s;
2) liquid flooding is measured the 1/10-1/15 of spray flux;
3) water seal height is by the decision of flue gas pressure head, and general flue gas pressure head is less than 1500Pa, so water seal height is about the 100-200mm fluid column.
Example 75t/h coal-burning boiler, exhaust gas volumn 100000Nm
3/ h, absorption tower spray liquid measure 300m
3During/h, reservoir volume 30m at the bottom of the absorption Tata
3/ h, the overfall flow rate of liquid is got 0.5m/s, and overfall (A) diameter is DN150mm, and overflow pipe (B) diameter is DN150mm, and water sealed tank is of a size of 500 * 500 * 500, overflow pipe insertion depth 200mm.
Description of drawings
Accompanying drawing 1 is the schematic diagram of absorbing tower liquid-level safety device
The specific embodiment
Boiler smoke enters desulfurizing tower (T101) desulfurization by air-introduced machine (C101) through tower import baffle door (FV101), and flue gas after desulfurization enters chimney through tower outlet damper door (FV102).
Absorption tower (T101) liquid level safety device is arranged on the bottom, absorption tower, and it is that overfall (A) fluid flow tube (B) and water sealed tank (C) constitute.When liquid level was higher than overfall, liquid flooding was gone into water sealed tank in the tower; When liquid is lower than overfall, prevent overflowing of flue gas by water seal.
After liquid flooding was gone into water sealed tank, (P101) delivered to treatment system by the desulfurizing agent pump.
Claims (4)
1. the present invention relates to that the liquid level place is provided with the liquid level safety device at the bottom of the fume desulfurating absorption tower tower.
2. according to claims 1 described absorbing tower liquid-level safety device, it is characterized in that the liquid level safety device can limit the highest liquid level on absorption tower.
3. according to claim 1,2 described absorbing tower liquid-level safety devices, it is characterized in that the liquid level safety device is made of overfall (A), fluid flow tube (B) and water sealed tank (C).When liquid level is higher than overfall (A), water sealed tank (C) is gone in the liquid level overflow in the tower, and (P101) sends to the desulfurizing agent treatment system by pump; When liquid level is lower than overfall (A), prevent overflowing of flue gas by water seal, its liquid level can be regulated by the liquid level gauge automatic control with lowest part the highest.
4. when the liquid level safety device designs:
1) flow rate of liquid during overflow is 0.2-0.5m/s;
2) the liquid flooding amount is the 1/10-1/15 of spray flux;
3) water seal height is generally 100-200mm, is determined by the adsorption tower smoke pressure head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100462265A CN101391172A (en) | 2007-09-21 | 2007-09-21 | Safety device of absorbing tower liquid-level in wet-method flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100462265A CN101391172A (en) | 2007-09-21 | 2007-09-21 | Safety device of absorbing tower liquid-level in wet-method flue gas desulfurization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101391172A true CN101391172A (en) | 2009-03-25 |
Family
ID=40491806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100462265A Pending CN101391172A (en) | 2007-09-21 | 2007-09-21 | Safety device of absorbing tower liquid-level in wet-method flue gas desulfurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101391172A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620275A (en) * | 2012-03-28 | 2012-08-01 | 浙江省电力试验研究院 | Commissioning method of bypass-free wet desulphurization system of coal-fired unit by means of tiny-oil ignition |
| CN103949138A (en) * | 2014-03-14 | 2014-07-30 | 航天环境工程有限公司 | Absorption tower for preventing flue gas from flowing backward and application thereof |
| CN108939920A (en) * | 2018-09-28 | 2018-12-07 | 国电环境保护研究院有限公司 | A kind of charcoal base catalytic desulfurizing denitrification apparatus regenerative feed heating system |
-
2007
- 2007-09-21 CN CNA2007100462265A patent/CN101391172A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620275A (en) * | 2012-03-28 | 2012-08-01 | 浙江省电力试验研究院 | Commissioning method of bypass-free wet desulphurization system of coal-fired unit by means of tiny-oil ignition |
| CN103949138A (en) * | 2014-03-14 | 2014-07-30 | 航天环境工程有限公司 | Absorption tower for preventing flue gas from flowing backward and application thereof |
| CN103949138B (en) * | 2014-03-14 | 2015-08-19 | 航天环境工程有限公司 | A kind of stop flue gas to pour in down a chimney absorption tower and application |
| CN108939920A (en) * | 2018-09-28 | 2018-12-07 | 国电环境保护研究院有限公司 | A kind of charcoal base catalytic desulfurizing denitrification apparatus regenerative feed heating system |
| CN108939920B (en) * | 2018-09-28 | 2023-12-12 | 国电环境保护研究院有限公司 | Regeneration heating system of desulfurization and denitrification device by carbon-based catalytic method |
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Open date: 20090325 |