CN107642796A - A kind of plasma ignition system for thermal power plant - Google Patents
A kind of plasma ignition system for thermal power plant Download PDFInfo
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- CN107642796A CN107642796A CN201610569181.9A CN201610569181A CN107642796A CN 107642796 A CN107642796 A CN 107642796A CN 201610569181 A CN201610569181 A CN 201610569181A CN 107642796 A CN107642796 A CN 107642796A
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- coal
- power plant
- igniter
- ignition
- plasma
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Abstract
The invention discloses a kind of plasma ignition system for thermal power plant, it includes plasma igniter (D), negative electrode (1) is wrapped to form igniter by the anode (2) of plasma igniter (D), igniter is lighted a fire to ignition layer of burner hearth (3), burner hearth（3）Ignition layer be the coal dust made of coal pulverizer, firing coal-dust makes boiler heating boost to form ignition system, start generating plant pulverized coal boiler by high-energy plasma igniter firing coal-dust, ignition layer coal pulverizer passes through frequency control, coal pulverizer minimum load is reduced to below 15% nominal output, it is therefore prevented that oxide skin caused by Initial Stage after Ignition increasing temperature and pressure is too fast comes off problem.Solve the problems, such as that coal fired power plant must build fuel system, reduce a major hazard source in power plant and location, and reduce coal fired power plant operation cost.
Description
Technical field
The present invention relates to a kind of plasma ignition system for thermal power plant.
Background technology
The sparking mode that thermal power plant uses at present mainly has big grease gun igniting increasing temperature and pressure, carries out boiler thermal-state flushing, after boiler heating boosting to a certain extent, restarts coal pulverizer, boosting is further heated up using big oil gun heat energy firing coal-dust.System is mainly made up of coal pulverizer, big oil gun, fuel system, oil storage tank etc..As shown in figure 3, G in Fig. 3：Oil storage tank, T：Fuel system, the big oil gun of Q tradition.
A large amount of fuel consumptions during ignition of the boiler, because uncombusted fuel oil is possible to pollute deduster, the measure typically taken is that sack cleaner first carries out precoating ash, and electrostatic precipitator does not put into operation, as a result chimney breast pollutant can be caused largely to discharge, is unfavorable for environmental protection.The problem of supercritical unit causes boiler oxidation skin to come off using plasma igniter simultaneously.
Because oil storage tank and oil system belong to major hazard source, it is necessary to which additional investment fire-fighting system, Oil Tank Area arrange special messenger on duty.
Application number CN200710152331.7, a kind of adjustable concentrating device for being applied to few-oil ignition or plasma ignition.Disclosure of the invention is a kind of suitable for few-oil ignition or the adjustable concentrating device of plasma ignition, and it includes elbow, curved cylinder, guide vane and outer sleeve；Curved cylinder is placed in elbow, by the overlapping fixed placement of axis, elbow lower end couples an outer sleeve, it is located at the lower section of curved cylinder porch in outer sleeve, it is provided with and is located at curved cylinder axis extended line both sides, several guide vanes of symmetric arrays, each guide vane middle part sets fulcrum rotary shaft, along respective fulcrum rotary shaft synchronous axial system, forming the top formed by some guide vanes can be open or the coal dust profile adjustment device of necking some guide vanes.Elbow front end is connected with burner end, and overcoat tube rear end is connected with pulverized coal channel.Advantages of the present invention and good effect are：For in few-oil ignition or plasma ignition system, realizing coal powder density distribution adjustable function, both fuel-economizing, and do not change the effect of former burner coal dust distribution character, boiler is not had any impact integrally.
In above-mentioned patent or fuel oil can be used.
The content of the invention
Present invention aims at cancel thermal power plant fuel system and oil storage tank, there is provided a kind of cost is lower, system is simpler, it is super to solve（It is super）The problem of criticality benchmark causes boiler oxidation skin to come off using plasma igniter, specifically a kind of plasma ignition system for thermal power plant.
For this technical scheme is that：A kind of plasma ignition system for thermal power plant, it includes plasma igniter (D), it is characterised in that：Negative electrode (1) is wrapped to form igniter by the anode (2) of plasma igniter (D), igniter is lighted a fire to ignition layer of burner hearth (3), ignition layer of burner hearth (3) is the coal dust that coal pulverizer (M) is made, and firing coal-dust makes boiler heating boost to form ignition system.
Further improve is：Described coal pulverizer (M) is connected to 6Kv active sections (A) by frequency converter (B), power switch (K) and worked.
Further improve is：The operating frequency range of coal pulverizer (M) is 30 ~ 50Hz.
Beneficial effect
The present invention eliminates, oil gun, fuel system and oil storage tank in the start-up course in thermal power plant, starts plasma igniter first, restarts frequency conversion coal pulverizer, adjusts frequency converter frequency and coal-supplying amount, pulverizer capacity is maintained 15% nominal output.Solve the problems, such as that coal fired power plant must build fuel system, reduce a major hazard source in power plant and location, and reduce coal fired power plant operation cost.
The coal pulverizer of ignition layer is driven using variable-frequency motor in the present invention, and coal pulverizer rotating speed is adjustable, coal pulverizer minimum load can be reduced into 15% nominal output by 25% nominal output, thoroughly solved super（It is super）Oxide skin in criticality benchmark start-up course comes off problem.
Vibration problem when ignition layer pulverizer capacity is less than 25% nominal output can effectively be prevented.
Thermal power plant can be made to be put into operation deduster in initial start stage, avoid atmosphere pollution discharge beyond standards.
Brief description of the drawings
Fig. 1 is frequency conversion coal pulverizer schematic diagram of the present invention.
Fig. 2 is plasma igniter schematic diagram of the present invention.
Fig. 3 is oil storage tank, fuel system and oil gun schematic layout pattern in former ignition system.
Marked in figure；
M is coal pulverizer, and K is power switch, and A is 6Kv active sections, and B is frequency converter, and D is plasma igniter, and G is oil storage tank, and T is fuel system, and Q is the big oil gun of tradition；1 is negative electrode, and 2 be anode, and 3 be burner hearth.
Embodiment
The present invention is as shown in Figure 1, 2.
A kind of plasma ignition system for thermal power plant, it includes plasma igniter (D), negative electrode (1) is wrapped to form igniter by the anode (2) of plasma igniter (D), igniter is lighted a fire to ignition layer of burner hearth (3), ignition layer of burner hearth (3) is the coal dust that coal pulverizer (M) is made, and firing coal-dust makes boiler heating boost to form ignition system.
Described coal pulverizer (M) is connected to 6Kv active sections (A) by frequency converter (B), power switch (K) and worked.
The operating frequency range of coal pulverizer (M) is 30 ~ 50Hz.
Plasma igniter（D）Lighting the coal dust that frequency conversion coal pulverizer (M) is made makes boiler heating boost, 6Kv active sections（A）Pass through power switch（K）To frequency converter（B）Power supply, frequency converter（B）Drag coal pulverizer（M）, by changing frequency converter（B）Frequency shift coal pulverizer（M）Rotating speed, reduce coal pulverizer（M）Output.
Coal pulverizer（M）Variable-speed operation, frequency range are 30 ~ 50Hz.
Claims (3)
1. a kind of plasma ignition system for thermal power plant, it includes plasma igniter (D), it is characterised in that：Negative electrode (1) is wrapped to form igniter by the anode (2) of plasma igniter (D), igniter is lighted a fire to ignition layer of burner hearth (3), ignition layer of burner hearth (3) is the coal dust that coal pulverizer is made, and firing coal-dust makes boiler heating boost to form ignition system.
A kind of 2. plasma ignition system for thermal power plant according to claim 1, it is characterised in that：Described coal pulverizer (M) is connected to 6Kv active sections (A) by frequency converter (B), power switch (K) and worked.
A kind of 3. plasma ignition system for thermal power plant according to claim 1, it is characterised in that：The operating frequency range of coal pulverizer (M) is 30 ~ 50Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569181.9A CN107642796A (en) | 2016-07-20 | 2016-07-20 | A kind of plasma ignition system for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569181.9A CN107642796A (en) | 2016-07-20 | 2016-07-20 | A kind of plasma ignition system for thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107642796A true CN107642796A (en) | 2018-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610569181.9A Pending CN107642796A (en) | 2016-07-20 | 2016-07-20 | A kind of plasma ignition system for thermal power plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN107642796A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354672A (en) * | 2020-10-16 | 2021-02-12 | 内蒙古京能康巴什热电有限公司 | Control method for output of coal mill in ignition process of boiler |
| CN115400865A (en) * | 2021-05-28 | 2022-11-29 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
-
2016
- 2016-07-20 CN CN201610569181.9A patent/CN107642796A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354672A (en) * | 2020-10-16 | 2021-02-12 | 内蒙古京能康巴什热电有限公司 | Control method for output of coal mill in ignition process of boiler |
| CN115400865A (en) * | 2021-05-28 | 2022-11-29 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
| CN115400865B (en) * | 2021-05-28 | 2023-11-14 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180130 |