CN205027203U - Online chemical cleaning device of air heater - Google Patents
Online chemical cleaning device of air heater Download PDFInfo
- Publication number
- CN205027203U CN205027203U CN201520693721.5U CN201520693721U CN205027203U CN 205027203 U CN205027203 U CN 205027203U CN 201520693721 U CN201520693721 U CN 201520693721U CN 205027203 U CN205027203 U CN 205027203U
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- CN
- China
- Prior art keywords
- air preheater
- chamber
- mixing chamber
- flush
- filter
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- Expired - Fee Related
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to an online chemical cleaning device of air heater, the device by flush tank, electric heater, dissolve medical kit, agitator, injection system, wash water pump, suction chamber, intake chamber, nozzle, mixing chamber, diffusion room, filter, washing water pipe, tangential injector set, pH meter, air preheater differential gauge and control system and constitute, the utility model discloses realize self - cleaning according to air heater operation pressure differential, prevent effectively that air heater from blockking up, guarantees power plant unit safety, stability, economical operation.
Description
Technical field
The utility model relates to a kind of thermal power plant's rotary regenerative air preheater in-site chemical cleaning field, specifically a kind of rotary regenerative air preheater in-site chemical cleaning device.
Background technology
Air preheater is positioned at power plant boiler flue afterbody, herein flue gas and metal temperature lower, air preheater cold-end air temperature, close to water dew point, easily causes Ash Blocking in Air Preheater.In addition for meeting GB13223-2011 " fossil-fuel power plant atmospheric pollutant emission standard " to NO
xconcentration of emission requirement, nearly all coal-fired station all sets up denitrating flue gas facility.Current coal-fired power plant sets up denitrating flue gas facility mainly based on SCR (SCR) technology.After adopting SCR denitration technique, part SO in flue gas
2sO will be oxidized to by denitrating catalyst
3, in the escaping of ammonia rate more than 2.23 × 10
-6mg/Nm
3after (mark state), temperature is within the scope of 150 DEG C ~ 200 DEG C, the SO in the ammonia of escape and flue gas
3reaction is generated ammonium sulfate ((NH
4)
2sO
4) and ammonium hydrogen sulfate (NH
4hSO
4).These side reaction products can be tightly adhered to air preheater heat exchange element surface, make heat exchange element generation strong corrosion and dust stratification.Air preheater blocking harmfulness main manifestations for adding wind flue resistance, and makes air-heater leakage increase, and causes blower fan power consumption unprecedented soaring; Moment of torsion suffered by air preheater rotor strengthens, and particularly lower bearing force-bearing situation worsens, and affect bearing service life, even abnormal damage, constitutes a threat to air preheater safe operation; Air preheater blocking is uneven, power plant unit is caused the fluctuation of a secondary wind pressure, air quantity, thus may cause blower fan surge, make unit cannot be with at full capacity or be forced to maintenance down, impact equipment long-term operation and economy of power plant time serious.Although take to improve boiler sootblowing steam pressure in actual motion, grey number of times blown in increase and the grey time is blown in prolongation, control flue gas denitrification system amount of ammonia slip, limit the prevention and control blocking measures such as the exhaust gas temperature lowest limit, and utilize the high pressure water system of the supporting installation of air preheater to clean, but produce little effect.Therefore, be necessary to invent a kind of novel in-site chemical cleaning device, effectively solve Blocking in Air Preheater plug problem.
Summary of the invention
The purpose of this utility model to provide a kind of air preheater in-site chemical cleaning device, and this device runs pressure reduction according to air preheater and realizes cleaning automatically, effectively prevents air preheater from blocking, and ensures power plant unit safety, stable, economical operation.
The purpose of this utility model is achieved in that this device comprises flush box, electric heater, molten medicine-chest, agitator, spraying system, flush water pump, suction chamber, intake chamber, nozzle, mixing chamber, diffusion room, filter, cleaning water pipe, tangential nozzle sets, pH meter, air preheater differential manometer, control system; Described spraying system is made up of suction chamber, intake chamber, nozzle, mixing chamber, diffusion room and positioning disk, flush box inside is provided with electric heater, flush box is connected with flush water pump, molten medicine-chest inside is provided with agitator, dispensing aperture is left on molten medicine-chest top, side delivery port is connected with suction chamber, the flush water pump other end is connected with intake chamber, described nozzle is arranged on the top of intake chamber and stretches in mixing chamber, described suction chamber and mixing chamber are connected, positioning disk is arranged in suction chamber, described diffusion room and being connected with mixing chamber; Described diffusion room is connected with filter, and the filter other end is connected with cleaning water pipe, and the cleaning water pipe other end is connected with tangential nozzle sets; Described diffusion room and filter connecting pipe arrange pH meter, and described electric heater, flush water pump, pH meter and air preheater differential pressure indicator are electrically connected with control system.
The utility model beneficial effect is:
1, the chemical agent that the utility model adopts mixes fully with demineralized water in spraying system, by tangential nozzle sets, alkali electroless liquid medicine is atomized, tangential nozzle sets coverage rate is large, increase alkali electroless medicament and air preheater heat-transfer surface contact area, improve chemical reaction rate, in the short time, just can remove air preheater heat-transfer surface tamper ammonium hydrogen sulfate.With sulfur trioxide in flue gas during atomization shape chemical agent is all right, slow down the corrosion of air preheater low-temperature end.
2, the utility model can effectively prevent dust and ammonium hydrogen sulfate in flue gas from, in air preheater low-temperature end deposition, delaying air preheater and running pressure reduction rising, thus reducing air-introduced machine power consumption, improving generating set efficiency.
3, the utility model technique is simple, easy to operate, and method is advanced, automatically runs, and maintenance, maintenance are minimum, and effect stability, operational management facilitates cost low.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram.
In the accompanying drawings: flush box 1, heater 2, molten medicine-chest 3, agitator 4, injection apparatus 5, flush water pump 6, suction chamber 7, intake chamber 8, nozzle 9, mixing chamber 10, diffusion room 11, filter 12, cleaning water pipe 13, tangential nozzle sets 14, pH meter 15, air preheater differential manometer 16, control system 17, air preheater low-temperature end heat exchange element 18, positioning disk 19.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
With reference to accompanying drawing 1, this device comprises flush box 1, electric heater 2, molten medicine-chest 3, agitator 4, spraying system 5, flush water pump 6, suction chamber 7, intake chamber 8, nozzle 9, mixing chamber 10, diffusion room 11, filter 12, cleaning water pipe 13, tangential nozzle sets 14, pH meter 15, air preheater differential manometer 16, control system 17, it is characterized in that: described spraying system 5 is by suction chamber 7, intake chamber 8, nozzle 9, mixing chamber 10, diffusion room 11 and positioning disk 19 form, flush box 1 inside is provided with electric heater 2, flush box 1 is connected with flush water pump 6, molten medicine-chest 3 inside is provided with agitator 4, dispensing aperture is left on molten medicine-chest 3 top, side delivery port is connected with suction chamber 7, flush water pump 6 other end is connected with intake chamber 8, described nozzle 9 is arranged on the top of intake chamber 8 and stretches in mixing chamber 10, described suction chamber 7 is connected with mixing chamber 10, positioning disk 19 is arranged in suction chamber 7, described diffusion room 11 and being connected with mixing chamber 10, described diffusion room 11 is connected with filter 12, and filter 12 other end is connected with cleaning water pipe 13, and the cleaning water pipe other end is connected with tangential nozzle sets 14, described diffusion room 11 and filter 12 connecting pipe arrange pH meter 15, and described electric heater 2, flush water pump 6, pH meter 15 and air preheater differential pressure indicator 16 are electrically connected with control system 17.
Described cleaning water pipe 13 is arranged in parallel with air preheater low-temperature end heat-transfer surface 18, and nozzle sets 14 and air preheater low-temperature zone heat-transfer surface 18 are arranged vertically.
Described flush box 1 and the inner line with rubber of molten medicine-chest 3.
Utility model works principle is:
1, add NaOH and tertiary sodium phosphate in molten medicine-chest 3, after being stirred by agitator 4, in liquid, NaOH mass percent concentration is 1%, and tertiary sodium phosphate mass percent concentration is 1%.After demineralized water enters flush box 1, start electric heater 2 and make water temperature reach 85 DEG C ~ 95 DEG C.
2, in flush box 1, demineralized water, after flush water pump 6 boosts, after entering the intake chamber 8 of spraying system 5, is sprayed by the nozzle 9 of the certain skew back degree of the uniform one-tenth of symmetry.Because demineralized water flow velocity after nozzle 9 sprays becomes large instantaneously, in mixing chamber 10, form vacuum.The liquid configured in molten medicine-chest 3 enters suction chamber 7, then enters mixing chamber 10 by positioning disk 19.Positioning disk 19 slows down liquid flow velocity, and liquid is imported in mixing chamber 10 equably, in order to avoid demineralized water current deflection, thus improves the performance of spraying system 5, ensures that liquid mixes solution ph afterwards and maintains 9.0 ~ 9.5 with demineralized water.
3, above-mentioned solution is removed after large granular impurity through filter 12 and is atomized after cleaning water pipe 13 to enter tangential nozzle sets 14, enter air preheater low-temperature end heat exchange element 18 from bottom to top, with air preheater low-temperature end heat exchange element 18 surface deposits generation chemical reaction, remove deposit.
4, usual, tangential nozzle sets atomization angle maintains 90 ° ~ 120 °, and spray coverage rate maintains 200% ~ 300%.
Claims (2)
1. an air preheater in-site chemical cleaning device, is characterized in that: this device comprises flush box (1), electric heater (2), molten medicine-chest (3), agitator (4), spraying system (5), flush water pump (6), suction chamber (7), intake chamber (8), nozzle (9), mixing chamber (10), diffusion room (11), filter (12), cleaning water pipe (13), tangential nozzle sets (14), pH meter (15), air preheater differential manometer (16), control system (17), is characterized in that: described spraying system (5) is by suction chamber (7), intake chamber (8), nozzle (9), mixing chamber (10), diffusion room (11) and positioning disk (19) composition, flush box (1) inside is provided with electric heater (2), flush box (1) is connected with flush water pump (6), and molten medicine-chest (3) inside is provided with agitator (4), and dispensing aperture is left on molten medicine-chest (3) top, side delivery port is connected with suction chamber (7), flush water pump (6) other end is connected with intake chamber (8), described nozzle (9) is arranged on the top of intake chamber (8) and stretches in mixing chamber (10), described suction chamber (7) and mixing chamber (10) are connected, positioning disk (19) is arranged in suction chamber (7), described diffusion room (11) and being connected with mixing chamber (10), described diffusion room (11) is connected with filter (12), and filter (12) other end is connected with cleaning water pipe (13), and the cleaning water pipe other end is connected with tangential nozzle sets (14), described diffusion room (11) and filter (12) connecting pipe arrange pH meter (15), and described electric heater (2), flush water pump (6), pH meter (15) and air preheater differential pressure indicator (16) are electrically connected with control system (17).
2. a kind of air preheater in-site chemical cleaning device according to claim 1, it is characterized in that: described cleaning water pipe (13) and air preheater low-temperature end heat-transfer surface (18) are arranged in parallel, nozzle sets (14) and air preheater low-temperature zone heat-transfer surface (18) are arranged vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520693721.5U CN205027203U (en) | 2015-09-09 | 2015-09-09 | Online chemical cleaning device of air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520693721.5U CN205027203U (en) | 2015-09-09 | 2015-09-09 | Online chemical cleaning device of air heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205027203U true CN205027203U (en) | 2016-02-10 |
Family
ID=55259726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520693721.5U Expired - Fee Related CN205027203U (en) | 2015-09-09 | 2015-09-09 | Online chemical cleaning device of air heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205027203U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN108856079A (en) * | 2018-06-15 | 2018-11-23 | 中国电建集团山东电力建设第工程有限公司 | A kind of device quickly cleaning cigarette cooler fouling |
| CN110360870A (en) * | 2019-07-11 | 2019-10-22 | 陈龙 | A kind of cleaning method of rotary regenerative air preheater |
| CN111536826A (en) * | 2020-05-19 | 2020-08-14 | 天津全诚桓金环保科技有限公司 | Disassembly-free green cleaning process for rotary air preheater |
| CN116428607A (en) * | 2023-06-14 | 2023-07-14 | 浙江程润云环境科技有限公司 | Denitration anti-blocking air preheater method and system |
-
2015
- 2015-09-09 CN CN201520693721.5U patent/CN205027203U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN108856079A (en) * | 2018-06-15 | 2018-11-23 | 中国电建集团山东电力建设第工程有限公司 | A kind of device quickly cleaning cigarette cooler fouling |
| CN108856079B (en) * | 2018-06-15 | 2021-09-24 | 中国电建集团山东电力建设第一工程有限公司 | Device for rapidly cleaning scale of smoke cooler |
| CN110360870A (en) * | 2019-07-11 | 2019-10-22 | 陈龙 | A kind of cleaning method of rotary regenerative air preheater |
| CN111536826A (en) * | 2020-05-19 | 2020-08-14 | 天津全诚桓金环保科技有限公司 | Disassembly-free green cleaning process for rotary air preheater |
| CN116428607A (en) * | 2023-06-14 | 2023-07-14 | 浙江程润云环境科技有限公司 | Denitration anti-blocking air preheater method and system |
| CN116428607B (en) * | 2023-06-14 | 2023-10-20 | 浙江程润云环境科技有限公司 | Denitration anti-blocking air preheater method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20170909 |