CN205265569U - Coal pulverizer with frequency conversion system - Google Patents
Coal pulverizer with frequency conversion system Download PDFInfo
- Publication number
- CN205265569U CN205265569U CN201521137073.1U CN201521137073U CN205265569U CN 205265569 U CN205265569 U CN 205265569U CN 201521137073 U CN201521137073 U CN 201521137073U CN 205265569 U CN205265569 U CN 205265569U
- Authority
- CN
- China
- Prior art keywords
- coal pulverizer
- frequency conversion
- switch
- frequency
- coal
- 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.)
- Active
Links
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
The utility model relates to a boiler safety and energy -conserving field disclose a coal pulverizer with frequency conversion system, and this coal pulverizer with frequency conversion system includes: first coal pulverizer (2), converter (1), with first coal pulverizer (2) are connected for the variable frequency starting coal pulverizer reduces the coal pulverizer minimum and exerts oneself. Adopt the utility model provides a coal pulverizer with frequency conversion system can reduce the minimum of coal pulverizer and exert oneself, guarantees the operation of coal pulverizer energy -conservation and safety and stability.
Description
Technical field
The utility model relates to boiler safety and energy-saving field, particularly, relates to one and has frequency conversion systemCoal pulverizer.
Background technology
For ensureing boiler long period safe and stable operation, when boiler cold-state starts, need be according to increasing temperature and pressure songLine is strictly controlled, and most boilers are plasma ignition device, as pulverized coal preparation system adopts medium-speed pulverizer (exampleAs ZGM113G-II type), minimum load 20.3t/h left and right, in the time of black furnace ignition trigger, boiler heatingSpeed is too fast, and the temperature, pressure rate of change is uncontrollable, affects boiler life.
Utility model content
The purpose of this utility model is to provide a kind of coal pulverizer with frequency conversion system, and this has frequency conversion systemCoal pulverizer can reduce the minimum load of coal pulverizer, ensure coal pulverizer safe and stable operation.
To achieve these goals, the utility model provides a kind of coal pulverizer with frequency conversion system, shouldThe coal pulverizer with frequency conversion system comprises: the first coal pulverizer; Frequency converter, connects with described the first coal pulverizerConnect, for variable frequency starting coal pulverizer, reduce coal pulverizer minimum load.
Preferably, this coal pulverizer with frequency conversion system also comprises that the first power supply being connected with power supply opensClose; The coal pulverizer selector switch being connected with described frequency converter and described the first power switch; With described changeFrequently the first frequency conversion switch that device is connected with described the first coal pulverizer; And with described the first power switch andDescribed the first coal pulverizer connects, with described frequency converter, described the first frequency conversion switch and the choosing of described coal pulverizerSelect the first power frequency switch of switch in parallel.
Preferably, this coal pulverizer with frequency conversion system also comprises the second coal pulverizer.
Preferably, this coal pulverizer with frequency conversion system also comprises with power supply and described coal pulverizer and selects to openClose the second source switch connecting; The second frequency conversion being connected with described frequency converter and described the second coal pulverizerSwitch; And be connected with described second source switch and described the second coal pulverizer, with described frequency converter,The second power frequency switch of described the second frequency conversion switch and the parallel connection of coal pulverizer selector switch.
By technique scheme, the coal pulverizer with frequency conversion system that adopts the utility model to provide, canTo carry out variable frequency starting coal pulverizer by frequency converter, and after lighting a fire successfully, control total coal amount, control boilerIncreasing temperature and pressure speed, reduces the minimum load of coal pulverizer, and is greater than former coal pulverizer minimum at coal-supplying amount and goes outWhen power, can steadily transfer power frequency operation to, ensure coal pulverizer safe and reliable operation.
Other features and advantages of the utility model give the detailed description of the invention part subsequently in detailExplanation.
Brief description of the drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms of descriptionPoint, be used from explanation the utility model with detailed description of the invention one below, but do not form this practicalityNovel restriction. In the accompanying drawings:
Fig. 1 is the structural representation of the coal pulverizer with frequency conversion system that provides of the utility model;
Fig. 2 is the schematic diagram of the coal pulverizer with frequency conversion system that provides of the utility model one embodiment.
Description of reference numerals
1 frequency converter 2 first coal pulverizers
3 second coal pulverizers
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated. Special declaration,Detailed description of the invention described herein, only for description and interpretation the utility model, is not limited to thisUtility model.
Fig. 1 is the structural representation of the coal pulverizer with frequency conversion system that provides of the utility model. As Fig. 1Shown in, the utility model provides a kind of coal pulverizer with frequency conversion system, and this has the coal-grinding of frequency conversion systemMachine comprises: the first coal pulverizer 2; Frequency converter 1, is connected with described the first coal pulverizer 2, opens for frequency conversionMoving coal pulverizer, reduces coal pulverizer minimum load.
This coal pulverizer with frequency conversion system also comprises the first power switch being connected with power supply; With describedThe coal pulverizer selector switch that frequency converter 1 is connected with described the first power switch; With described frequency converter 1 and instituteState the first frequency conversion switch that the first coal pulverizer 2 connects; And with described the first power switch and described firstCoal pulverizer 2 connects, with described frequency converter 1, described the first frequency conversion switch and described coal pulverizer selector switchThe first power frequency switch in parallel.
Frequency converter (Variable-frequencyDrive), also referred to as variable frequency drives or driving governor.Frequency converter 1 is the one of adjustable-speed drive system, is that application variable-frequency driving technique changes ac motor workMake frequency and the amplitude of voltage, smoothly control AC electrical motor speed and torque.
Select the first coal pulverizer 2, the first power switches and the first frequency conversion switch to close at coal pulverizer selector switchClose and when the first power frequency switch disconnects, the first coal pulverizer 2 variable frequency startings, when frequency conversion maintenance, fault orWhile needing power frequency operation the first coal pulverizer 2, the first power switch and the first power frequency switch closure, coal pulverizerSelector switch and the first frequency conversion switch disconnect, now the first coal pulverizer 2 power frequency operations.
Fig. 2 is the schematic diagram of the coal pulverizer with frequency conversion system that provides of the utility model one embodiment.As shown in Figure 2, this coal pulverizer with frequency conversion system also comprises the second coal pulverizer 3, and with power supply andThe second source switch that described coal pulverizer selector switch connects; With described frequency converter 1 and described the second coal-grindingThe second frequency conversion switch that machine 3 connects; And connect with described second source switch and described the second coal pulverizer 3Connect second power frequency in parallel with described frequency converter 1, described the second frequency conversion switch and coal pulverizer selector switchSwitch.
Present embodiment can adopt a frequency converter 1 to control the mode of two coal pulverizers, equally can be realThe existing variable frequency starting of coal pulverizer and the switching of frequency conversion and power frequency. Present embodiment is added a coal pulverizer and is selectedSwitch, is connected with frequency converter 1, the first power switch and second source switch, starts first at needsWhen coal pulverizer 2, coal pulverizer selector switch is placed in to the first coal pulverizer 2 one sides, is selecting as required changeFrequency or power frequency operation the first coal pulverizer 2 are selected closed the first frequency conversion in the time of converting operation the first coal pulverizer 2Switch and the first power switch, open the first power frequency switch, and frequency converter 1 accesses, and the first coal pulverizer 2 becomesFrequently operation; In the time of power frequency operation the first coal pulverizer 2, select closed the first power frequency switch and the first power switch,The first frequency conversion switch disconnects, and now frequency converter does not access, the first coal pulverizer 2 power frequency operations.
Same, in the time that needs start the second coal pulverizer 3, as mentioned above, coal pulverizer selector switch is putIn the second coal pulverizer 3 one sides, switch opens is identical during with operation the first coal pulverizer 2 with closed selection,Do not repeat them here.
The coal pulverizer with frequency conversion system that utilizes present embodiment to provide, has carried out operation test, concreteAs follows, possess after ignition condition at boiler, variable frequency starting the first coal pulverizer 2 is lighted a fire, because warm mill comparesFully, when igniting, air preheater entrance wind-warm syndrome has been increased to 100 DEG C, and the first coal pulverizer 2 uses variable frequency starting,Make the first coal pulverizer 2 after the success of 20t/h coal amount down-firing, subtract gradually coal amount, minimum operation coal amountBe down to 7.87t/h by 20t/h, flameholding, subsequently every once (1-1.5t/h) of 10min coal, controlThe all wall temperature heating rates of boiler processed are not more than 1.5 DEG C/min.
After ignition of the boiler, start flow-control at 400t/h, progressively increase subsequently confluent, due to the first millCoal machine 2 variable frequency startings, the whole increasing temperature and pressure speed of boiler control ratio is more satisfactory, and all wall temperature temperature rises do not haveExceed 1.5 DEG C/min temperature rise rate.
Because starting the first coal pulverizer 2, this adopts variable frequency starting, in the time starting the second coal pulverizer 3, and canThe first coal pulverizer 2 coal amounts are reduced to 10t/h, restart the second coal pulverizer 3 and move, effectively controlled totalCoal amount, after the second coal pulverizer 3 starts, the I of total coal amount is placed on 28t/h, has effectively controlled and has started theThe situation that causes coal amount significantly to change when two coal pulverizers 3. It during Unit Commitment, is boiler heat load tuneWholely provide abundant space, greatly reduced Initial Stage after Ignition volume of boiler thermic load, can effectively control boilerThe rate of temperature change of heating surface is not more than 1.5 DEG C/min.
By technique scheme, the coal pulverizer with frequency conversion system that adopts the utility model to provide, canTo carry out variable frequency starting coal pulverizer by frequency converter, and after lighting a fire successfully, subtract gradually coal amount, control boilerIncreasing temperature and pressure speed, reduces the minimum load of coal pulverizer, and is greater than former coal pulverizer minimum at coal-supplying amount and goes outWhen power, can steadily transfer power frequency operation to, ensure coal pulverizer safe and reliable operation.
Below describe by reference to the accompanying drawings preferred embodiment of the present utility model in detail, still, this practicality is newType is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present utility model,Can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to this realityWith novel protection domain.
It should be noted that in addition each the concrete technology spy described in above-mentioned detailed description of the inventionLevy, in reconcilable situation, can combine by any suitable mode. For fear of needn'tThe repetition of wanting, the utility model is to the explanation no longer separately of various possible combinations.
In addition, between various embodiment of the present utility model, also can be combined, onlyWant it without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (4)
1. a coal pulverizer with frequency conversion system, is characterized in that, this has the coal-grinding of frequency conversion systemMachine comprises:
The first coal pulverizer (2);
Frequency converter (1), is connected with described the first coal pulverizer (2), for variable frequency starting coal pulverizer, fallsLow coal pulverizer minimum load.
2. the coal pulverizer with frequency conversion system according to claim 1, is characterized in that, this toolThere is the coal pulverizer of frequency conversion system also to comprise the first power switch being connected with power supply; With described frequency converter (1)The coal pulverizer selector switch being connected with described the first power switch; With described frequency converter (1) and describedThe first frequency conversion switch that one coal pulverizer (2) connects; And with described the first power switch and described firstCoal pulverizer (2) connects, with described frequency converter (1), described the first frequency conversion switch and the choosing of described coal pulverizerSelect the first power frequency switch of switch in parallel.
3. the coal pulverizer with frequency conversion system according to claim 1, is characterized in that, this toolThere is the coal pulverizer of frequency conversion system also to comprise the second coal pulverizer (3).
4. the coal pulverizer with frequency conversion system according to claim 3, is characterized in that, this toolThere is the coal pulverizer of frequency conversion system also to comprise the second source being connected with power supply and described coal pulverizer selector switchSwitch; The the second frequency conversion switch being connected with described frequency converter (1) and described the second coal pulverizer (3); WithAnd be connected with described second source switch and described the second coal pulverizer (3), with described frequency converter (1),The second power frequency switch of described the second frequency conversion switch and the parallel connection of coal pulverizer selector switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137073.1U CN205265569U (en) | 2015-12-31 | 2015-12-31 | Coal pulverizer with frequency conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137073.1U CN205265569U (en) | 2015-12-31 | 2015-12-31 | Coal pulverizer with frequency conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205265569U true CN205265569U (en) | 2016-05-25 |
Family
ID=56007072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521137073.1U Active CN205265569U (en) | 2015-12-31 | 2015-12-31 | Coal pulverizer with frequency conversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205265569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333144A (en) * | 2021-07-20 | 2021-09-03 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
-
2015
- 2015-12-31 CN CN201521137073.1U patent/CN205265569U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333144A (en) * | 2021-07-20 | 2021-09-03 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
| CN113333144B (en) * | 2021-07-20 | 2022-05-31 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205265569U (en) | Coal pulverizer with frequency conversion system | |
| CN203744298U (en) | Self-powered electronic ignition device of gas stove | |
| CN204797552U (en) | Dual -purpose cabinet that evaporates of gas electricity | |
| CN204388151U (en) | A kind of integrated kitchen range with flue fire prevention electronic detection function | |
| CN206648314U (en) | Water heater combustion power control system | |
| CN202234750U (en) | Gas steam box control circuit | |
| CN204808066U (en) | Hot -water heating blanket host computer control circuit | |
| CN102538030B (en) | Ignition and braking device of gas cooker | |
| CN203274023U (en) | Intelligent electric control heating furnace | |
| CN105444216A (en) | Multifunctional gas stove | |
| CN204716312U (en) | A kind of high-pressure cylinder quick start system of thermal power generation monoblock | |
| CN202835554U (en) | Wall-hanging stove three-core controller | |
| CN204421089U (en) | Energy-saving environment protection intelligent control combustion system | |
| KR101524813B1 (en) | Method for improving performance of boiler by propotional control for circulating pump | |
| CN204705044U (en) | A kind of control device for Horizontal gas hot-water boiler combustor | |
| CN202470136U (en) | Ignition and brake device for gas cooking stove | |
| CN203549774U (en) | Boiler device and generator set | |
| CN106155132A (en) | A kind of water warming blanket host computer control circuit | |
| CN204665334U (en) | A kind of boiler cold-state starts energy saver | |
| CN210568594U (en) | Power supply device for kitchen range and embedded kitchen range | |
| CN204986951U (en) | Steam boiler ancillary device control circuit | |
| CN207649139U (en) | A kind of organic thermal carrier heating furnace chain control device | |
| CN104913507B (en) | A kind of intelligence control system of biological particles water heater for heating | |
| CN204240340U (en) | Regulate the middle temperature flue gas recirculation device of steam temperature | |
| KR20120132119A (en) | Method preventing malfunction of heating system in early extinguishing of the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |