CN203454193U - Secondary air circulating system - Google Patents
Secondary air circulating system Download PDFInfo
- Publication number
- CN203454193U CN203454193U CN201320495733.8U CN201320495733U CN203454193U CN 203454193 U CN203454193 U CN 203454193U CN 201320495733 U CN201320495733 U CN 201320495733U CN 203454193 U CN203454193 U CN 203454193U
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- CN
- China
- Prior art keywords
- air
- secondary air
- circulatory system
- preheater
- pipeline
- 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 - Lifetime
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- 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
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Abstract
The utility model provides a secondary air circulating system. The secondary air circulating system comprises an air pipeline, an air heater, a blower, an air preheater and a secondary air circulating pipeline, wherein an air flow direction is defined for the air pipeline; the air heater, the blower and the air preheater are connected in series to the air pipeline in sequence; the secondary air circulating pipeline is communicated with the outlet of the air preheater and the inlet of the blower. According to the secondary air circulating system, heated air is mixed with cold air at an inlet, so that the inlet air temperature of the air preheater is increased, and air entering the air preheater can be heated primarily without stopping an air pipeline on the side of the air heater to be overhauled under the condition that the air heater stops running.
Description
Technical field
The utility model relates to thermal power plant's air inlet system, in particular, relates to a kind of Secondary Air circulatory system.
Background technology
Under cold weather conditions, before the pressure fan in thermal power plant carries out heat exchange by nature air air amount preheater and boiler combustion flue gas, need to heat up through steam air heater, the preliminary air that improves enters wind-warm syndrome (the 30 ℃ of left and right before air preheater, 350mw unit specification), prevent that air preheater from by cold end corrosion or in the situation that the temperature difference is too large, internal modification occurring, and affects its service life.Yet, because steam air heater run duration can not quit work, if breaking down, steam air heater needs repairing while processing, the air sucking can not tentatively heat, thereby do not reach the temperature requirement into air preheater, in this case, the air pipe line of Awaiting Overhaul steam air heater side can only be closed, can reduce like this generated energy, affect the normal operation of power generation.
Given this, be necessary to improve existing technique, thereby while solving stoppage in transit steam air heater, the problem that the air pipe line of affiliated Awaiting Overhaul steam air heater side also will be stopped transport.
Utility model content
The technical problems to be solved in the utility model is: the Secondary Air circulatory system that still can guarantee the air pipe line normal operation of Awaiting Overhaul steam air heater side when a kind of steam air heater fault is provided.
For achieving the above object, the utility model provides following technical scheme: a kind of Secondary Air circulatory system, it comprises steam air heater, pressure fan and air preheater that definition has the air pipe line of air-flow direction and is series at successively air pipe line, the described Secondary Air circulatory system also comprises Secondary Air circulation line, and described Secondary Air circulation line is communicated with the outlet of described air preheater and the entrance of described pressure fan.
Further, the described Secondary Air circulatory system is provided with the valve of controlling Secondary Air circulation line break-make.
Further, described valve is middle temperature manually-operated gate, and valve temperature specification is 120 ℃～450 ℃.
Further, described Secondary Air circulation line adopts fluid conveying seamless steel pipe.
Further, the specification of described seamless steel pipe is Ф 530 * 8, material 20#.
Compared with prior art, the utility model at least has the following advantages: the described Secondary Air circulatory system is by mixing the air after heating with import cold air, thereby improved the entrance wind-warm syndrome of air preheater, even if make in the situation that steam air heater is out of service, also can tentatively heat to entering the air of air preheater the air pipe line of the Awaiting Overhaul steam air heater side of needn't stopping transport.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Secondary Air circulatory system.
The specific embodiment
Refer to Fig. 1, below in conjunction with accompanying drawing, the utility model Secondary Air circulatory system is described in detail.
The utility model mainly launches around air pipe line and the boiler smoke pipeline of air preheater 1 and the described air preheater 1 of process.Cardinal principle is: the node that air preheater 1 transmits as heat, by the heat carrying in boiler smoke, by air preheater 1, be transmitted in the air entering before boiler, air preheat is arrived to certain temperature, and then improve burning condition, reduce the thermal loss that non-complete combustion of fuel causes; Simultaneously, performance limitations due to air preheater 1 self, for fear of it, by cold end corrosion or in the situation that the temperature difference is too large, there is internal modification, must improve in advance again air themperature (the 30 ℃ of left and right that enter before air preheater, 350MW unit specification), because of and derive the auxiliary heating equipment such as steam air heater 3.
The described Secondary Air circulatory system comprises described steam air heater 3, pressure fan 2 and the described air preheater 1 that definition has the air pipe line 4 of air-flow direction I and is series at successively air pipe line 4, the described Secondary Air circulatory system also comprises Secondary Air circulation line 5, and described Secondary Air circulation line 5 is communicated with the outlet of described air preheater 1 and the entrance of described pressure fan 2.Thus, when steam air heater 3 breaks down when out of service, mix with cold air the porch that only hot-air heating through air preheater 1 need be sent into again to air preheater 1, just can improve the bulk temperature of air, guarantee air preheater 1 normal operation and without the air pipe line that stops Awaiting Overhaul steam air heater side.
The described Secondary Air circulatory system is provided with the valve 6 of controlling Secondary Air circulation line 5 break-makes.Described valve 6 is middle temperature manually-operated gate, and valve temperature specification is 120 ℃～450 ℃.Valve 6 not only can be controlled the switching of Secondary Air circulation line 5 under steam air heater different conditions, can also regulate openings of sizes according to temperature difference situation, guarantees the reasonable adjusting of power conversion.It is Ф 530 * 8 that described Secondary Air circulation line 5 adopt fluids to carry to be used HTHP steel pipe, the present embodiment to select specification, the seamless steel pipe of material 20#, thus can guarantee better the security of high-temperature gas pipeline.
In sum, these are only preferred embodiment of the present utility model, should not limit scope of the present utility model with this.Be that every simple equivalence of doing according to the utility model claims and description changes and modifies, all should still belong in the scope that the utility model patent contains.
Claims (5)
1. the Secondary Air circulatory system, it comprises steam air heater, pressure fan and air preheater that definition has the air pipe line of air-flow direction and is series at successively air pipe line, it is characterized in that: the described Secondary Air circulatory system also comprises Secondary Air circulation line, described Secondary Air circulation line is communicated with the outlet of described air preheater and the entrance of described pressure fan.
2. the Secondary Air circulatory system according to claim 1, is characterized in that: the described Secondary Air circulatory system is provided with the valve of controlling Secondary Air circulation line break-make.
3. the Secondary Air circulatory system according to claim 2, is characterized in that: described valve is middle temperature manually-operated gate, and valve temperature specification is 120 ℃～450 ℃.
4. according to the Secondary Air circulatory system described in any one in claim 1-3, it is characterized in that: described Secondary Air circulation line adopts fluid conveying seamless steel pipe.
5. the Secondary Air circulatory system according to claim 4, is characterized in that: the specification of described seamless steel pipe is Ф 530 * 8, material 20#.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320495733.8U CN203454193U (en) | 2013-08-15 | 2013-08-15 | Secondary air circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320495733.8U CN203454193U (en) | 2013-08-15 | 2013-08-15 | Secondary air circulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203454193U true CN203454193U (en) | 2014-02-26 |
Family
ID=50134065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320495733.8U Expired - Lifetime CN203454193U (en) | 2013-08-15 | 2013-08-15 | Secondary air circulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203454193U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807034A (en) * | 2015-04-10 | 2015-07-29 | 广西方元电力股份有限公司来宾电厂 | Device for improving inlet air temperature of air pre-heater in electricity generation |
| CN105485710A (en) * | 2014-10-09 | 2016-04-13 | 中国石油化工股份有限公司 | Air preheating method for waste sulfuric acid splitting process |
-
2013
- 2013-08-15 CN CN201320495733.8U patent/CN203454193U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485710A (en) * | 2014-10-09 | 2016-04-13 | 中国石油化工股份有限公司 | Air preheating method for waste sulfuric acid splitting process |
| CN104807034A (en) * | 2015-04-10 | 2015-07-29 | 广西方元电力股份有限公司来宾电厂 | Device for improving inlet air temperature of air pre-heater in electricity generation |
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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: 20140226 |