CN202791994U - Smoke temperature deviation adjustment device for corner tangentially fired boiler - Google Patents
Smoke temperature deviation adjustment device for corner tangentially fired boiler Download PDFInfo
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- CN202791994U CN202791994U CN 201220429277 CN201220429277U CN202791994U CN 202791994 U CN202791994 U CN 202791994U CN 201220429277 CN201220429277 CN 201220429277 CN 201220429277 U CN201220429277 U CN 201220429277U CN 202791994 U CN202791994 U CN 202791994U
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- air pipeline
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- temperature deviation
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Abstract
The utility model discloses a smoke temperature deviation adjustment device for a corner tangentially fired boiler. The smoke temperature deviation adjustment device comprises a combustor, a left main hot air pipe, a right main hot air pipe, a tertiary air pipeline, electric adjustment valves and a despun air pipeline, wherein the left main hot air pipe and the right main hot air pipe are connected with the despun air pipeline; the four corners of the combustor are connected with the tertiary air pipeline and the despun air pipeline at the same time; the tertiary air pipeline and the despun air pipeline are both provided with the electric adjustment valves; and the other end of the tertiary air pipeline is connected with an outlet of a powder discharging machine. On one hand, the smoke temperature deviation adjustment device is a system improvement based on the conventional tertiary air anti-tangential technology, and can guarantee that enough anti-tangential air in the corresponding tertiary air pipeline still enters a boiler furnace even if a powder making system is stopped; and on the other hand, the anti-tangential air flow is adjustable and can also adapt to unit load change.
Description
Technical field
The utility model relates to field of boilers, is specially a kind of tangentially-fired boiler cigarette temperature deviation adjusting device.
Background technology
Power industry adopts the Terms of Corner Tangential Combustion pulverized-coal fired boiler, is used for weakening furnace outlet flue gas residual rotation, reduces the gentle Temperature Deviation of cigarette.
Terms of Corner Tangential Combustion is a kind of form that the Chinese large-sized station boiler generally adopts.Its main feature is the gas stream in the stove rotation, makes the interior central low-pressure area of stove entrainment medium in the stove, thereby makes fuel, air and coal dust be able to strong mixing, produces good burning condition; And because of the heating of adjacent angle, upstream air-flow, light and make coal powder ignition, flameholding; And because swirling eddy in the stove rises in the shape of a spiral until furnace outlet has prolonged the stroke of pulverized coal particle in stove, be conducive to the after-flame of coal dust.Along with the rotation of air-flow is risen, rotatablely move and weaken gradually and be tending towards evenly, but below the furnace arch, furnace nose of furnace outlet, still there is the rotation of air-flow, although a minute shield has certain racemization, but residual rotation still exists, and this has just caused horizontal flue left and right sides cigarette temperature, smoke speed deviation.And this deviation usually is the major reason that produces Temperature Deviation, causes the local overheating booster, has had a strong impact on the safety and economic operation of power plant.Along with the increase of boiler capacity, Fuel Consumption and burning Air Quantity Required are also basically with capacity growth in direct ratio, and spin intensity increases, and horizontal flue left and right sides cigarette temperature, smoke speed deviation have the trend of increase.
Pulverized-coal fired boiler for Terms of Corner Tangential Combustion, traditional and ripe method, with part Secondary Air and the tertiary air traditional method of indicating the pronunciation of a Chinese character, after Reversed Tangential Air Admission enters in the stove according to certain imaginary circle, the swirl flame that direction of rotation and breeze airflow form is reverse, residual rotation in the time of can weakening like this, to a certain extent flue gas and enter horizontal flue.
Traditional part wind traditional method of indicating the pronunciation of a Chinese character technology, can weaken to a certain extent flue gas residual rotation control cigarette temperature deviation, but when unit load variation or pulverized coal preparation system operation number of units change, the capital causes positive and negative swirling eddy equilibrium relation to change, the optimum state of debugging at certain operating point, all can be inapplicable in other all operating modes, lack the adjustment means, adaptability for working condition is poor.For example: when unit load was constant, the main smoke airflow spin intensity that is determined by the breeze airflow burning was constant, but needed the pulverized coal preparation system of stopping transport because of the powder storehouse powder position height this moment, and then its corresponding tertiary air namely disappears, and Reversed Tangential Air Admission flow and spin intensity are significantly decayed; Constant when pulverized coal preparation system operation number of units, the Reversed Tangential Air Admission fluence and intensity remains unchanged, but unit load is when changing, and the main smoke airflow spin intensity can change in the same way along with the unit load increase and decrease.These all can cause positive and negative swirling eddy equilibrium relation to change.
The utility model content
The technical problem that the utility model solves is to provide a kind of tangentially-fired boiler cigarette temperature deviation adjusting device, the system that this device is based on traditional tertiary air traditional method of indicating the pronunciation of a Chinese character technical foundation improves, stop transport even can guarantee pulverized coal preparation system, still have enough Reversed Tangential Air Admissions to enter burner hearth in the corresponding tertiary air pipeline; On the other hand, the Reversed Tangential Air Admission flow is adjustable, also can adapt to the unit load variations.
The technical problem that the utility model solves realizes by the following technical solutions:
Tangentially-fired boiler cigarette temperature deviation adjusting device, comprise burner, the female pipe of left side hot blast, the female pipe of right side hot blast, tertiary air pipeline, electric control valve and racemization wind pipeline, hot blast female pipe pipe of being connected with the right side hot blast in described left side connects the racemization wind pipeline, four jiaos of described burners connect tertiary air pipeline and racemization wind pipeline simultaneously, be provided with electric control valve on described tertiary air pipeline and the racemization wind pipeline, the described tertiary air pipeline other end connects the mill exhauster outlet.
Compared with prior art, the beneficial effects of the utility model are:
1, when pulverized coal preparation system changes of operating modes, unit load variation, all can regulate traditional method of indicating the pronunciation of a Chinese character intensity by the racemization wind flow, reach control cigarette temperature deviation effect, wide accommodation;
2, be conducive to realize staged air distribution under the underload, avoid pulverized coal preparation system to stop transport after, all hot blasts are sent into burner hearth with the Secondary Air form, cause Secondary Air to sneak into too early phenomenon.Therefore all favourable to combustion economization under the underload and stability;
3, can alleviate under the unit underload, after pulverized coal preparation system is stopped transport, be control burner hearth oxygen amount, the secondary air register aperture is too small, blower fan enters the contradiction of surge area easily, and the control oxygen making amount is not too high under the prerequisite of assurance fan operation safety, improves performing low-load running of machine set stability.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
In order to make realization technological means of the present utility model, creation characteristic, to reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, tangentially-fired boiler cigarette temperature deviation adjusting device, comprise burner 1, the female pipe 2 of left side hot blast, the female pipe 3 of right side hot blast, tertiary air pipeline 4, electric control valve 5 and racemization wind pipeline 6, the female pipe of described left side hot blast 2 is the pipe of be connected 3 connection racemization wind pipelines 6 with the right side hot blast, 1 four jiaos of described burners connect tertiary air pipeline 4 and racemization wind pipeline 6 simultaneously, be provided with electric control valve 5 on described tertiary air pipeline 4 and the racemization wind pipeline 6, described tertiary air pipeline 4 other ends connect the mill exhauster outlet.
Racemization wind pipeline 6 materials described in the utility model are identical with tertiary air pipeline 4, equal diameters or smaller; Tertiary air Men Yuanwei Electrically operated gate can be kept motionless; If manually operated door then should make Electrically operated gate into; Hot blast can be taken from wind one time, also can take from Secondary Air, and temperature is higher, the blower fan surplus is larger but preferentially select.
The utility model has guaranteed that no matter whether unit load height, pulverized coal preparation system move, the racemization tertiary air all exists, by electric control valve control traditional method of indicating the pronunciation of a Chinese character intensity, make the positive and negative rotation energy balance, flue gas residual rotation and cigarette temperature deviation are weakened to possible minimum state.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.Claimed scope of the present utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. tangentially-fired boiler cigarette temperature deviation adjusting device, comprise burner, the female pipe of left side hot blast, the female pipe of right side hot blast, tertiary air pipeline, electric control valve and racemization wind pipeline, it is characterized in that: hot blast female pipe pipe of being connected with the right side hot blast in described left side connects the racemization wind pipeline, four jiaos of described burners connect tertiary air pipeline and racemization wind pipeline simultaneously, be provided with electric control valve on described tertiary air pipeline and the racemization wind pipeline, the described tertiary air pipeline other end connects the mill exhauster outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220429277 CN202791994U (en) | 2012-08-28 | 2012-08-28 | Smoke temperature deviation adjustment device for corner tangentially fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220429277 CN202791994U (en) | 2012-08-28 | 2012-08-28 | Smoke temperature deviation adjustment device for corner tangentially fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202791994U true CN202791994U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220429277 Expired - Fee Related CN202791994U (en) | 2012-08-28 | 2012-08-28 | Smoke temperature deviation adjustment device for corner tangentially fired boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN202791994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060847A (en) * | 2021-10-29 | 2022-02-18 | 华北电力科学研究院有限责任公司 | Control method and device for flue gas temperature deviation of tower furnace hearth of fan mill powder system |
-
2012
- 2012-08-28 CN CN 201220429277 patent/CN202791994U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060847A (en) * | 2021-10-29 | 2022-02-18 | 华北电力科学研究院有限责任公司 | Control method and device for flue gas temperature deviation of tower furnace hearth of fan mill powder system |
| CN114060847B (en) * | 2021-10-29 | 2023-09-19 | 华北电力科学研究院有限责任公司 | Control method and device for smoke temperature deviation of tower furnace hearth of fan mill pulverizing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20170828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |