CN201028790Y - High-performance anti-corrosion air preheater - Google Patents
High-performance anti-corrosion air preheater Download PDFInfo
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- CN201028790Y CN201028790Y CNU2007200361132U CN200720036113U CN201028790Y CN 201028790 Y CN201028790 Y CN 201028790Y CN U2007200361132 U CNU2007200361132 U CN U2007200361132U CN 200720036113 U CN200720036113 U CN 200720036113U CN 201028790 Y CN201028790 Y CN 201028790Y
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- air preheater
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Abstract
The utility model relates to an air preheater with high capacity of canker resisting. The utility model comprises a heat absorbing sections and heat discharging sections which are arranged in different flowing, heat medium circulating pipes which are connected with the heat absorbing sections and the heat discharging pipes and a heat medium circulating pump. The inside of the circulating pipe is provided with heat mediums with a saturated steam temperature under the standard atmosphere pressure which is bigger than 100 DEG C; the circulating pump is a frequency conversing pump; the utility model is provided with a temperature measuring and controlling device, and the temperature measuring scout is contacted with the wall of the heat passing surface, the controlling signal outputting end of the temperature measuring and controlling device is electrically connected with the frequency conversing signal inputting end of the frequency conversing pump. Because the utility model adopts the heat medium with a saturated steam temperature higher than 100 DEG C under the standard atmosphere pressure and the saturated steam pressure is much lower in the same temperature, then the utility model can ensure the safe running in a long time when the temperatures of the heat discharging sections are much higher; the utility model controls the temperatures on the pipe walls of the heat absorbing sections by adjusting the flux speed of the heat medium in the air preheater and can effectively prevent the canker of the bare points and elevate the ability of the canker resisting of the device.
Description
Technical field
The utility model relates to the anticorrosive air preheater of a kind of air preheater, particularly high-performance.
Background technology
At present, air preheater heat transmission equipment form commonly used has: shell and tube air preheater, plate air preheater, heat-pipe air preheater, fin tube type air preheater, water quality heating agent air preheater etc.Owing to be waste heat recovery, temperature is all lower generally speaking, heat exchange between shell and tube air preheater, plate air preheater, fin tube type air preheater cold and heat source is by steel pipe or steel plate wall heat conduction heat exchange, the heat-transfer surface wall temperature is lower, equipment more easily forms dew point corrosion, in case formation dew point corrosion, cold fluid and hot fluid will blowby, just need parking maintenance.In the aforesaid air preheater, water quality heating agent air preheater is for preventing that dew point corrosion from having ability preferably, and its composition comprises endotherm section, the heat release section that places different runners, connects the thermal medium circulation pipe of suction, heat release section, and water circulating pump, be full of water in the circulation pipe.But when gas temperature is higher, the working medium temperature is higher in the water quality heating agent air preheater, pressure medium is just higher in the circulation pipe, can bring adverse influence to the security of equipment, and under different operating modes, water circulating pump can't carry out suitable adjustment to the water circulation, may cause equipment heat-transfer surface wall temperature to be lower than dew-point temperature, still has the possibility of dew point corrosion.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes the shortcoming of prior art, provides a kind of high-performance anticorrosive air preheater.
The technical scheme that its technical problem that solves the utility model adopts is as follows: the anticorrosive air preheater of a kind of high-performance, form and comprise endotherm section, the heat release section that places different runners, the thermal medium circulation pipe that connects endotherm section, heat release section, and the thermal medium circulating pump, it is characterized in that: have normal atmosphere in the described circulation pipe and depress saturated-steam temperature greater than 100 ℃ thermal medium; Described circulating pump is a variable frequency pump; Have temperature measurement and control instrument, its temperature probe is faced the wall and meditated with the heat transfer of endotherm section and is contacted, and its control signal output is electrically connected with the frequency variation signal input of variable frequency pump.
The beneficial effects of the utility model are as follows: owing to adopted normal atmosphere to depress saturated-steam temperature greater than 100 ℃ thermal medium, its saturated vapor pressure is lower under uniform temp, therefore also can guarantee the long-term safety operation of equipment at endotherm section, when the heat release section temperature is higher; Variable frequency pump is installed on the circulation pipe and has temperature measurement and control instrument, when detecting the endotherm section temperature when low, temperature measurement and control instrument sends a corresponding signal of telecommunication to variable frequency pump, and change the slow down flow velocity of thermal medium in the pipe of power by variable frequency pump, thereby reduce the coefficient of heat transfer between interior thermal medium of pipe and the tube wall, thereby improve tube wall temperature, guaranteed that the endotherm section tube wall temperature is higher than dew-point temperature, effectively avoid dew point corrosion, improved the equipment resistance to corrosion; Otherwise, when the endotherm section temperature is higher, then accelerate the flow velocity of thermal medium in the pipe by variable frequency pump, to reach the purpose of suitable reduction tube wall temperature, pressure in the pipe is under control, and has further guaranteed device ', and has accomplished to maximally utilise the heat energy that may utilize.
Description of drawings
Fig. 1 is the anticorrosive air preheater structural representation of the utility model high-performance.
The specific embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in further detail.But the utility model is not limited to given example.
As shown in Figure 1, the anticorrosive air preheater of high-performance, form and comprise endotherm section 3, the heat release section 5 that places different runners, the thermal medium circulation pipe 2 that connects endotherm section 3, heat release section 5, and thermal medium circulating pump 6, have normal atmosphere in the described circulation pipe 2 and depress saturated-steam temperature greater than 100 ℃ thermal medium 4; Described circulating pump 6 is a variable frequency pump; Equipment has temperature measurement and control instrument 7, and its temperature probe (not drawing among the figure) is faced the wall and meditated with the heat transfer of endotherm section 3 and contacted, and its control signal output is electrically connected with the frequency variation signal input of variable frequency pump 6.Among the embodiment, it can be conduction oil, fused salt or organic solution greater than 100 ℃ thermal medium 4 that the normal atmosphere that has in the circulation pipe 2 is depressed saturated-steam temperature.
Owing to the volume of thermal medium 4 can change along with variation of temperature, so design has an expansion slot 1 in the circulation pipe 2 of equipment, when device temperature raise, thermal medium 4 volumes increased in the equipment, just can hold, further guarantee the security of equipment by expansion slot 1.
In order to prevent the dew point corrosion of heat release section 5, temperature measurement and control instrument 7 of the present utility model also has a temperature probe (not drawing among the figure) that conducts heat and face the wall and meditate and contact with heat release section, in order to the tube wall temperature of monitoring heat release section 5.
The heat transfer area of endotherm section 3 and heat release section 5 calculates by heating power and determines during design, has considered that also tube wall temperature should be greater than dew-point temperature simultaneously.After equipment installs, be full of normal atmosphere in the equipment and depress saturated-steam temperature greater than 100 ℃ thermal medium 4.Thermal medium 4 in the equipment is to circulate by acting in the system of variable frequency pump 6, and constantly heat is passed to heat release section 5 from endotherm section 3, realizes the transmission of heat.Because the variation of operating mode, tube wall temperature during design can change to some extent, and design has tube wall temperature checkout gear 7 in the air preheater, can regulate the flow velocity of thermal medium 4 by the signal of telecommunication that checkout gear 7 sends by variable frequency pump 6, thereby the control valve wall temperature is avoided dew point corrosion.
Claims (8)
1. the anticorrosive air preheater of high-performance, form and comprise endotherm section, the heat release section that places different runners, the thermal medium circulation pipe that connects endotherm section, heat release section, and the thermal medium circulating pump, it is characterized in that: have normal atmosphere in the described circulation pipe and depress saturated-steam temperature greater than 100 ℃ thermal medium; Described circulating pump is a variable frequency pump; Have temperature measurement and control instrument, its temperature probe is faced the wall and meditated with the heat transfer of endotherm section and is contacted, and its control signal output is electrically connected with the frequency variation signal input of variable frequency pump.
2. the anticorrosive air preheater of high-performance according to claim 1 is characterized in that: have an expansion slot in the described circulation pipe.
3. the anticorrosive air preheater of high-performance according to claim 1 is characterized in that: described thermal medium is a kind of in conduction oil, fused salt, the organic solution.
4. the anticorrosive air preheater of high-performance according to claim 1 is characterized in that: described temperature measurement and control instrument also has a temperature probe that conducts heat and face the wall and meditate and contact with heat release section.
5. the anticorrosive air preheater of high-performance according to claim 1 is characterized in that: described endotherm section, heat release section are the grating type heat exchangers.
6. the anticorrosive air preheater of high-performance according to claim 1, it is characterized in that: described endotherm section, heat release section are the pipe heat exchangers that crawls.
7. the anticorrosive air preheater of high-performance according to claim 1, it is characterized in that: described endotherm section, heat release section are plate type heat exchangers.
8. the anticorrosive air preheater of high-performance according to claim 1 is characterized in that: fin is equipped with in described endotherm section, the heat release section tube wall outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200361132U CN201028790Y (en) | 2007-04-11 | 2007-04-11 | High-performance anti-corrosion air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200361132U CN201028790Y (en) | 2007-04-11 | 2007-04-11 | High-performance anti-corrosion air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201028790Y true CN201028790Y (en) | 2008-02-27 |
Family
ID=39133004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200361132U Expired - Lifetime CN201028790Y (en) | 2007-04-11 | 2007-04-11 | High-performance anti-corrosion air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201028790Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345997A (en) * | 2011-09-29 | 2012-02-08 | 熊泽宇 | Dew point corrosion resistant method for flue gas heat exchanger |
| CN109340812A (en) * | 2018-09-26 | 2019-02-15 | 大唐东北电力试验研究院有限公司 | A kind of Horizontal Tubular Air Preheater anti-block apparatus |
| CN109340813A (en) * | 2018-09-26 | 2019-02-15 | 大唐东北电力试验研究院有限公司 | A kind of vertical tubular Antiblocked device for air preheater |
-
2007
- 2007-04-11 CN CNU2007200361132U patent/CN201028790Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345997A (en) * | 2011-09-29 | 2012-02-08 | 熊泽宇 | Dew point corrosion resistant method for flue gas heat exchanger |
| CN102345997B (en) * | 2011-09-29 | 2012-11-28 | 熊泽宇 | Dew point corrosion resistant method for flue gas heat exchanger |
| CN109340812A (en) * | 2018-09-26 | 2019-02-15 | 大唐东北电力试验研究院有限公司 | A kind of Horizontal Tubular Air Preheater anti-block apparatus |
| CN109340813A (en) * | 2018-09-26 | 2019-02-15 | 大唐东北电力试验研究院有限公司 | A kind of vertical tubular Antiblocked device for air preheater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080227 |