CN203837007U - Air preheater anti-corrosion device - Google Patents
Air preheater anti-corrosion device Download PDFInfo
- Publication number
- CN203837007U CN203837007U CN201420260766.9U CN201420260766U CN203837007U CN 203837007 U CN203837007 U CN 203837007U CN 201420260766 U CN201420260766 U CN 201420260766U CN 203837007 U CN203837007 U CN 203837007U
- Authority
- CN
- China
- Prior art keywords
- air
- preheater
- hot air
- air inlet
- communicated
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses an air preheater anti-corrosion device which comprises an air preheater with a smoke inlet communicated with a smoke outlet of a boiler. A cold air inlet of the air preheater is connected with a draught fan. A hot air outlet of the air preheater is communicated with a hot air backflow pipe. The other end of the hot air backflow pipe is communicated with the air inlet side of an inner cavity of the draught fan. A valve is connected to the hot air backflow pipe in series. An air mixer is connected to an air inlet of the draught fan and is provided with a cold air inlet and a hot air inlet. The hot air backflow pipe is connected with the hot air inlet so as to be communicated with the air inlet side of the inner cavity of the draught fan. The air preheater anti-corrosion device is simple in structure, good in low-temperature corrosion prevention effect and capable of prolonging the service life of the air preheater.
Description
Technical field
The utility model relates to a kind of air preheater erosion protection system.
Background technology
At present in boiler oil more or less all contain sulphur.In the time using the more fuel of sulfur content, the sulfur in fuel is after burning, and major part becomes sulfur dioxide, and small part wherein is further oxidized to sulfur trioxide gas under certain condition.Sulfur trioxide gas and water vapour can be combined into sulfuric acid vapor, and its dew-point temperature of condensing is up to more than 120 DEG C, and flue gas acid content is larger, and dew-point temperature is higher, and the stifled ash of corrosion is more serious.In order to improve boiler thermal output, most boiler is equiped with air preheater, and when air preheater tube wall temperature is during lower than generated sulphuric acid dew point, sulfuric acid just condenses and produces corrosion on tube wall, is called cold end corrosion.The degree that metal wall is corroded depends on the number of sulfuric acid condensation number, the height of the size of concentration and metallic walls surface temperature.Sulfuric acid resembles one deck glued membrane, and one side is bonded on tube wall corrodes, and one side is adhesion cigarette ash constantly, forms multiple sulfate, and progressive additive, low-temperature slagging scorification that Here it is.
In fuel, the number of sulfur content, affects choosing of exhaust gas temperature.Simultaneously, in view of to boiler efficiency, prevent considering of the factors such as back-end surfaces cold end corrosion and safe operation, at present, the boiler design exhaust gas temperature that air preheater is housed is generally 130～160 DEG C, and the boiler of some specific fuel (as refuse furnace, biomass boiler, coke-oven coal steam stove etc.) exhaust gas temperature is even higher.Because air preheater cold wind end entrance wind-warm syndrome is lower, air preheater cold air inlet pipe wall temperature is generally lower than flue gas acid dew point, and pipe corrosion is quite serious.Long-term operation certainly will and cause very big impact service life to safe operation of the boiler.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of air preheater erosion protection system that can reduce air preheater cold end corrosion, extend its service life.
In order to solve the problems of the technologies described above, the utility model provides a kind of air preheater erosion protection system with following structure, comprise the empty preheater that its gas approach is communicated with boiler outlet flue, on the inlet of cold air of empty preheater, be connected with blower fan, its design feature is to be communicated with hot air reflux pipe on the hot air outlet of sky preheater, the other end of hot air reflux pipe is communicated with air intake one side of blower fan inner chamber, on hot air reflux pipe, is serially connected with valve.
On the air inlet of described blower fan, be connected with air mixer, air mixer is provided with cool air inlet and hot air inlet; Hot air reflux pipe by with realize being connected of hot air inlet and being communicated with of air intake one side of blower fan inner chamber.
Described air mixer comprises the housing that is provided with inner chamber, and described cool air inlet is located at housing one end, and the housing other end is provided with the air outlet slit for being connected with blower fan, and described hot air inlet is located at the sidepiece of housing; In housing, be provided with between hot air inlet and cool air inlet and turnover cold air flow control board.
Described valve is electric butterfly valve.
Mix with cold air the inlet side that a part of hot blast that the utility model flows out air preheater by arranging of a hot air reflux pipe drains into blower fan, then sent in air preheater by blower fan, can significantly improve the wall temperature of air preheater cold air inlet place pipe, make wall temperature higher than flue gas acid dew point, can effectively prevent the cold end corrosion of air preheater, the service life of significant prolongation air preheater.
In sum, the utlity model has simple in structurely, prevent the advantage that cold end corrosion is effective, can extend the long service life of air preheater.
Brief description of the drawings
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of air mixer.
Detailed description of the invention
With reference to Fig. 1, air preheater erosion protection system provided by the utility model, comprise sky preheater 1, empty preheater 1 is existing product, its flue gas that utilizes boiler to discharge heats and makes it to become hot-air cold air, and hot-air is sent into boiler furnace again, when the required oxygen of burning is provided, can improve the furnace temperature of boiler, to reach energy-conservation object.The gas approach of empty preheater 1 is communicated with boiler 10 outlet flues, on the inlet of cold air of empty preheater 1, be connected with blower fan 2, on the hot air outlet of empty preheater 1, be communicated with hot air reflux pipe 3, on hot air reflux pipe 3, be serially connected with valve 4, valve 4 adopts electric butterfly valve, can certainly adopt other valve to reach the object of adjust flux.The other end of hot air reflux pipe 3 can directly be communicated with air intake one side of blower fan 2 inner chambers, and the other end of hot blast return duct 3 can be directly connected with the chamber wall of air intake one side of blower fan 2 inner chambers; In order not destroy blower fan, the other end of hot air reflux pipe 3 can be communicated with air intake one side of blower fan 2 inner chambers by the air mixer 5 being connected on blower fan 2 air inlets.
As shown in Figure 2, described air mixer 5 comprises the housing that is provided with inner chamber, cool air inlet 6 is established in housing one end, and the housing other end is provided with the air outlet slit 8 for being connected with the air inlet of blower fan 2, and the sidepiece of housing is provided with the hot air inlet 9 connecting for hot air reflux pipe 3.In housing, be provided with between hot air inlet and cool air inlet and turnover cold air flow control board 7, both air flow modulation plate 7 is screwed onto on housing by double-screw bolt 11, the outer end of double-screw bolt 11 is connected with handle 12, is bolted with the locking nut 13 between handle 12 and housing on double-screw bolt 11.Can change the angle of cold air flow control board 7 by handle 12, thereby change the inlet of cold wind, when cold air flow control board 7 is parallel to the axis of housing inner chamber, intake maximum, cold air flow control board 7 is during perpendicular to the axis of housing inner chamber, intake minimum.
Claims (4)
1. an air preheater erosion protection system, comprise the empty preheater (1) that its gas approach is communicated with boiler outlet flue, on the inlet of cold air of empty preheater (1), be connected with blower fan (2), it is characterized in that being communicated with hot air reflux pipe (3) on the hot air outlet of sky preheater (1), the other end of hot air reflux pipe (3) is communicated with air intake one side of blower fan (2) inner chamber, is serially connected with valve (4) on hot air reflux pipe (3).
2. air preheater erosion protection system as claimed in claim 1, is characterized in that being connected with air mixer (5) on the air inlet of described blower fan (2), and air mixer (5) is provided with cool air inlet and hot air inlet; Hot air reflux pipe (3) by with realize being connected of hot air inlet and being communicated with of air intake one side of blower fan (2) inner chamber.
3. air preheater erosion protection system as claimed in claim 2, it is characterized in that described air mixer (5) comprises the housing that is provided with inner chamber, described cool air inlet (6) is located at housing one end, the housing other end is provided with the air outlet slit (8) for being connected with blower fan (2), and described hot air inlet (9) is located at the sidepiece of housing; In housing, be provided with between hot air inlet and cool air inlet and turnover cold air flow control board (7).
4. the air preheater erosion protection system as described in claim 1,2 or 3, is characterized in that described valve (4) is electric butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420260766.9U CN203837007U (en) | 2014-05-21 | 2014-05-21 | Air preheater anti-corrosion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420260766.9U CN203837007U (en) | 2014-05-21 | 2014-05-21 | Air preheater anti-corrosion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203837007U true CN203837007U (en) | 2014-09-17 |
Family
ID=51514839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420260766.9U Expired - Fee Related CN203837007U (en) | 2014-05-21 | 2014-05-21 | Air preheater anti-corrosion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203837007U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567476A (en) * | 2015-01-05 | 2015-04-29 | 洛阳瑞昌石油化工设备有限公司 | Plate type air preheating device with adjusting function |
| CN110131746A (en) * | 2019-05-10 | 2019-08-16 | 哈尔滨锅炉厂有限责任公司 | Horizontal air preheater erosion protection system and anti-corrosion method |
-
2014
- 2014-05-21 CN CN201420260766.9U patent/CN203837007U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567476A (en) * | 2015-01-05 | 2015-04-29 | 洛阳瑞昌石油化工设备有限公司 | Plate type air preheating device with adjusting function |
| CN110131746A (en) * | 2019-05-10 | 2019-08-16 | 哈尔滨锅炉厂有限责任公司 | Horizontal air preheater erosion protection system and anti-corrosion method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203757989U (en) | Novel gas water heater | |
| CN204313677U (en) | Degree of depth enamel pipe energy-saving appliance | |
| CN203837007U (en) | Air preheater anti-corrosion device | |
| CN201517894U (en) | Industrial furnace combustion smoke waste heat recycling system suitable for fuel oil work conditions | |
| CN100593683C (en) | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger | |
| CN103245183A (en) | Efficient energy-saving baking device | |
| CN204176914U (en) | Full premixed condensed gas water heater | |
| CN204006619U (en) | Condensing water heater system and device | |
| CN201053764Y (en) | Highly efficient energy-saving heat-conductive oil stove | |
| CN104406185A (en) | Boiler smoke gas cascade afterheat recovery energy-saving device | |
| CN201259210Y (en) | Non-phase-change composite heat exchanger | |
| CN102607049A (en) | Technology for combusting pulverized coal fed by circulating air for industrial boiler | |
| CN201014754Y (en) | Flue gas waste heat utilization device of corrosion-proof energy-saving type industry boiler | |
| CN104315872B (en) | Boiler flue gas waste heat recycling and energy-saving device with boiler flue gas dust removing effect | |
| CN201390691Y (en) | Coal economizer of glass furnace for preventing low-temperature corrosion | |
| CN203869016U (en) | Heat exchange device of spirally corrugated tube at tail of industrial boiler | |
| CN204043443U (en) | Gas cooler | |
| CN204693828U (en) | A kind of environmental protection condensation minute-pressure Phase transformation boiler | |
| CN106016714A (en) | Household boiler rapidly heating water tank | |
| CN202902601U (en) | Low-emission high-efficiency coal-saving numerical control boiler | |
| CN203215694U (en) | Tail gas burner and chlorinated CO tail gas processing system | |
| CN203810711U (en) | Energy-saving oil and gas fired boiler | |
| CN204829982U (en) | Flue gas degree of depth cooling device | |
| CN205948592U (en) | A desulfurization system for using low -sulfur coal burning boiler | |
| CN204880063U (en) | Novel smokeless dustless steam boiler |
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: 20140917 |