CN213300142U - Smoke exhaust system - Google Patents
Smoke exhaust system Download PDFInfo
- Publication number
- CN213300142U CN213300142U CN202022167946.0U CN202022167946U CN213300142U CN 213300142 U CN213300142 U CN 213300142U CN 202022167946 U CN202022167946 U CN 202022167946U CN 213300142 U CN213300142 U CN 213300142U
- Authority
- CN
- China
- Prior art keywords
- smoke
- air preheater
- temperature
- air
- stove
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
- F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of smoke pumping system of the stove, connect in parallel in the original wind smoke system, include a stove smoke blower communicated with air preheater at least, one end of the stove smoke blower is connected with outlet port of burner hearth through the fire tube of high-temperature stove, another end connects the flue of the entrance of air preheater, flow into the air preheater after converging the original flue gas; the utility model utilizes the furnace smoke fan to extract hot smoke from the proper position of the furnace chamber, and the hot smoke is sent to the inlet flue of the air preheater through the smoke pipeline of the high-temperature furnace, so as to improve the smoke temperature at the inlet of the air preheater; the temperature of the hot primary air is heated to meet the requirement of drying output required by burning high-moisture coal of a coal pulverizing system through the heat exchange effect of the air preheater and the primary air; the device has the characteristics of simple structure, flexible control and low modification cost.
Description
Technical Field
The utility model relates to a thermal power plant installs auxiliary assembly additional, concretely relates to take out stove cigarette system.
Background
In recent years, due to the influences of factors such as reduction of coal production amount of coal mine close to coal mine, coal price floating, increase of transportation cost and the like, the coal quality actually used by a power plant and the designed coal quality have great difference, and especially the difference of key indexes brings many problems to the production of the power plant: causing high-temperature corrosion and coking of the boiler, reducing the efficiency of the boiler, drying of a powder making system, insufficient output, increasing the service power and the like.
The moisture of coal as fired in some power plants is higher than that of designed coal, the heat value is reduced, and the problems of insufficient drying output of a pulverizing system, high primary air rate and low secondary air rate of boiler operation, poor wind distribution condition of combustion in the boiler, large temperature deviation of a heating surface, influence on loaded operation of a unit and the like are caused.
The main method for solving the problem of high-moisture low-heat value coal combustion is to improve the temperature of primary hot air, the temperature of the primary hot air exceeds a design value, the drying requirement of a powder making system is met, the proportion of primary hot air and secondary hot air can be reasonable, the combustion of a hearth can be stable, and the loaded capacity of a unit can be guaranteed. The common means for improving the hot primary air of the power plant at present mainly comprise: and adding a warm air device, adding a tubular air preheater, extracting the furnace smoke to a powder making system to perform two-medium or three-medium drying and the like.
These measures have advantages and disadvantages. The system resistance is increased after the air heater is added, and the power consumption of the boiler auxiliary machine is increased; the extraction flue gas is dried to the powder process system, arranges relatively troublesome, and flue gas extraction system and many sets of powder process system all have the connection to 600MW unit is the example, generally fires with high moisture, and the coal quality design of low calorific value has 8 sets of powder process systems, and 7 fortune 1 are equipped with. The drying system is complex and has many hidden danger points.
Therefore, if the inlet smoke temperature of the air preheater can be reasonably increased, the temperature of the hot primary air can be increased a lot, reasonable parameters are selected, and the air temperature can completely meet the drying output requirement of the powder making system.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide an exhaust fume system can directly extract hot flue gas all the way from the furnace exit, send air preheater entry flue through high temperature furnace tobacco pipe, just so increased the flue gas temperature of air preheater entry.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model provides a take out stove cigarette system, connects in parallel in original wind cigarette system, includes a stove cigarette fan 2 that is linked together with air preheater 3 at least, and stove cigarette fan 2 one end is through high temperature furnace tobacco pipe and 1 exit linkage of furnace, and the flue of 3 entrys of air preheater is connected to the other end, joins and flows into air preheater 3 behind the original flue gas.
The input and output pipelines of the furnace smoke blower 2 are respectively provided with a regulating valve, and the input and output pipelines are also connected with a regulating valve in parallel.
The utility model discloses utilize stove cigarette fan to extract partly high temperature flue gas from furnace suitable position, send air preheater entry flue through high temperature furnace tobacco pipe way, rationally improve the entry smoke temperature of air preheater, improve hot primary air temperature under the certain condition of cold primary air temperature and amount of wind to satisfy the dry requirement of exerting oneself of powder process system. Has the following beneficial effects:
1. the whole system is simple in structure, low in cost for improving the existing power plant technology and obvious in effect.
2. The temperature of the primary air is increased visually, the control is flexible, and the drying output of the powder making system is convenient to control.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a flue gas extraction system, which is connected in parallel to an original flue gas system, includes two flue gas fans 2 symmetrically installed and communicated with respective corresponding air pre-heaters 3, each flue gas fan 2 is connected in the same way in the pipeline, one end of each flue gas fan is connected with the outlet of a furnace 1 through a high temperature flue gas pipeline, the other end of each flue gas fan is connected with the flue of the inlet of the air pre-heater 3, and the flue gas flows into the air pre-heater 3 after being converged with the original flue gas.
The input pipeline of the furnace smoke blower 2 is provided with an electric adjusting valve, the output pipeline is provided with an adjusting valve, and the input pipeline and the output pipeline are also connected in parallel with an electric adjusting valve.
The utility model discloses a theory of operation does:
utilize stove smoke fan 2 to extract partly high temperature flue gas from furnace 1, send 3 entry flues of air preheater through high temperature furnace smoke pipeline, the entry gas temperature of air preheater 3 has been improved, follow-up heat transfer function through air preheater 3, to the primary air, the overgrate air preheats, improve the temperature of the primary air overgrate air of air preheater entrance, because the overgrate air temperature need not be too high, can follow and control on the overgrate air entry temperature, the hot primary air temperature after the improvement can satisfy the dry problem of exerting oneself of subsequent powder process system combustion high moisture coal.
Because the hot furnace smoke is taken from the area of the boiler hearth 1, the smoke temperature is higher, the high temperature smoke is between 1200 ℃ and 1000 ℃, the medium temperature smoke is about 700 ℃, and the smoke temperature required by primary air drying can be completely met.
Claims (2)
1. The utility model provides a take out stove cigarette system, connects in parallel in original wind cigarette system, its characterized in that includes a stove cigarette fan (2) that are linked together with air preheater (3) at least, and stove cigarette fan (2) one end is through high temperature furnace tobacco pipe and furnace (1) exit linkage, and the flue of air preheater (3) entry is connected to the other end, joins and flows into air preheater (3) behind the original flue gas.
2. A fume extraction system according to claim 1, wherein the inlet and outlet pipes of the fume fan (2) are provided with respective regulating valves, and the inlet and outlet pipes are connected in parallel with a regulating valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022167946.0U CN213300142U (en) | 2020-09-28 | 2020-09-28 | Smoke exhaust system |
| DE202021105093.4U DE202021105093U1 (en) | 2020-09-28 | 2021-09-21 | Furnace smoke extraction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022167946.0U CN213300142U (en) | 2020-09-28 | 2020-09-28 | Smoke exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213300142U true CN213300142U (en) | 2021-05-28 |
Family
ID=76010424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022167946.0U Active CN213300142U (en) | 2020-09-28 | 2020-09-28 | Smoke exhaust system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN213300142U (en) |
| DE (1) | DE202021105093U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440253A (en) * | 2022-02-10 | 2022-05-06 | 西安热工研究院有限公司 | System for solving stalling, surging and low-temperature corrosion of unit deep peak regulation primary fan |
-
2020
- 2020-09-28 CN CN202022167946.0U patent/CN213300142U/en active Active
-
2021
- 2021-09-21 DE DE202021105093.4U patent/DE202021105093U1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202021105093U1 (en) | 2021-09-28 |
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| GR01 | Patent grant |