CN101852440A - Automatic purging system of furnace arch slope and horizontal flue of boiler - Google Patents
Automatic purging system of furnace arch slope and horizontal flue of boiler Download PDFInfo
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- CN101852440A CN101852440A CN 201010124033 CN201010124033A CN101852440A CN 101852440 A CN101852440 A CN 101852440A CN 201010124033 CN201010124033 CN 201010124033 CN 201010124033 A CN201010124033 A CN 201010124033A CN 101852440 A CN101852440 A CN 101852440A
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- check valve
- boiler
- controller
- horizontal flue
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Abstract
The invention relates to an automatic purging system of a furnace arch slope and a horizontal flue of a boiler. The automatic purging system comprises at least two groups of purging nozzles (1) with a check valve (2), a temperature measuring device (3) and a purging controller (4), wherein the input end of each purging nozzle (1) is connected with the output end of the check valve (2) through a pipeline, and the input end of the check valve (2) is connected with an external purging medium pipeline conveying system through a pipeline; the output end of the temperature measuring device (3) is connected with the input end of the purging controller (4), and the output end of the purging controller (4) is connected with the input end of the check valve (2). When the temperature reaches a set start valve, the automatic purging system is automatically started and then automatically stopped after accumulated ash is purged, therefore, the aim of saving energy is achieved, the heat transfer efficiency is improved, the wide-margin negative pressure fluctuation of a hearth is eliminated, the boiler security is greatly improved, and the economic loss is avoided.
Description
Technical field
The invention belongs to the heat enginnering field, the dust that relates in particular to a kind of coal-fired thermal power generation boiler and Industrial Boiler heating surface purges a kind of boiler furnace arch, furnace nose slope and the automatic purging system of horizontal flue.
Background technology
Coal burning boiler of power station furnace arch, furnace nose slope and horizontal flue are the positions that is easy to deposit dust, particularly these position dust stratifications were more not serious at that time when the design of the on the low side or boiler structure of flue gas flow rate, even caused dust stratification in the running regularly to collapse and reduce heat-transfer effect between flue gas and the heating surface.Industrial Boiler also often because design reason improperly, produces smoke backflow district or dead angle, causes local dust stratification.At present, be used for the general vertical both walls that is arranged in of telescopic steam sootblower at boiler furnace arch, furnace nose slope and horizontal flue position, be mainly used to heating surface, as on the heating surface of high temperature superheater, high temperature reheater the purging of sticking dust.The soot blower of Bu Zhiing is to the purging poor effect of the dust that deposits on furnace arch, furnace nose slope and the horizontal flue like this.When the flue width was big, the length of soot blower itself was restricted because of the rigidity reason, so just can't blow to the middle part institute dust stratification dirt of furnace arch, furnace nose slope and horizontal flue at all, had so just caused the bulk deposition of dust at the middle part.
Summary of the invention
The technical problem to be solved in the present invention is that the defective at known technology exists provides a kind of boiler furnace arch, furnace nose slope and the automatic purging system of horizontal flue.Make it furnace arch, furnace nose slope and horizontal flue middle part institute dust stratification dirt are implemented to purge, thereby can prevent the bulk deposition of dust effectively at the middle part.
Technical solution of the present invention is that above-mentioned boiler furnace arch, furnace nose slope that provides and the automatic purging system of horizontal flue as shown in Figure 1, are made up of purge nozzle 1 and temperature measuring equipment 3, the purging controller 4 of two group band check valves 2 at least.The output pipe of the input of wherein said purge nozzle 1 and described check valve 2 connects, and the input pipe of described check valve 2 connects the output of peripheral hardware blowing medium pipe-line transportation system.The output of described temperature measuring equipment 3 connects the input of described purging controller 4 by shielded cable, and the output of described purging controller 4 also connects the input of the check valve 2 of described purge nozzle 1 by shielded cable.
Above-mentioned purge nozzle 1 plays a part to purge furnace arch, furnace nose slope or the lip-deep deposition dust of horizontal flue in native system, and it is installed on the boiler heating surface such as the fin between the water screen tube in furnace arch, furnace nose slope and horizontal flue zone.The quantity of purge nozzle 1 depends on flue width dimensions or dust deposit region area.The setting height(from bottom) of purge nozzle 1 and angle also have clear and definite requirement, blowing medium, and steam or air penetrate at a high speed from the circumferential aperture of nozzle.High temperature resistant antifriction metal (AFM) casting or the machined of purge nozzle 1 general employing energy forms.According to on-site actual situations, purge nozzle can be formed some groups, purge by purging the controller follow procedure.
Above-mentioned temperature measuring equipment 3 is used to measure the temperature of boiler furnace arch, furnace nose slope or horizontal flue surface deposition staubosphere.The temperature element of temperature measuring equipment 3 adopts thermoelectricity usually, and occasionally other can reflect the temperature element of variations in temperature rapidly.
Above-mentioned purging controller 4 is the intelligent objects that can be used for controlling the purging opportunity and the mode of purging, controls purging frequency and purge time automatically by parameters such as purging condition, starting end, clearing end and purging temperature are set.Automatic purging can be set and manually purge dual mode.Also can utilize power plant's scattered control system to realize the function of above-mentioned purging controller.
So native system can purge automatic control by the dust stratification variations in temperature that above-mentioned temperature measuring equipment 3 measures.Promptly when the temperature of the dust stratification layer of above-mentioned temperature measuring equipment 3 detected above-mentioned certain group purge nozzle 1 reaches default start-up temperature value, can send " unlatchings " and instruct check valve 2 to this group purge nozzle 1 correspondence by purging controller 4, make check valve 2 Open valves.Blowing medium through the input of peripheral hardware blowing medium pipe-line transportation system enters this group purge nozzle 1 by this check valve 2.So the blowing medium of input penetrates from purge nozzle 1 at a high speed, blown afloat by the dust stratification of gray area purge nozzle 1, the dust that is blown afloat is drained by the vacuum suction of default air-introduced machine.After the dust of deposition was purged, the dust stratification layer temperature that temperature measuring equipment 3 detects fell back to " close value " of setting, closed check valve 2 so purging controller 4 sends instruction automatically, stopped to purge.
Operation principle of the present invention is: in the boiler running process, low or have the furnace arch, furnace nose slope of recirculating zone and horizontal flue heating surface surface to be easy to the dust deposit stratification that makes fluttering sudden at flue gas flow rate.Have the local velocity of raising, destroy the recirculating zone, the effect of kicking up the deposition dust from the steam or the compressed-air actuated high-speed jet of purge nozzle ejection.And the dust of kicking up is drained by the vacuum suction that air-introduced machine produces.The surface temperature of dust stratification layer is higher, and is several close with flue-gas temperature.And the temperature of dust stratification layer bottom is lower, and the dust of deposition is thick more, and the temperature of dust stratification layer bottom is also low more, reflects the variation of dust stratification layer thickness by the variations in temperature of dust stratification layer bottom, can this temperature signal be set to purge controller and start the signal that blows ash.When temperature reaches " the startup value " of setting, just can realize the automatic startup of the check valve of native system by purging controller.After dust stratification was purged, this temperature recovery as a same reason, also just can realize that the closing automatically of check valve of native system stop to purge, and reaches purpose of energy saving by purging controller during to " close value " set.
The invention has the beneficial effects as follows:
1, after boiler heating surface obtains cleaning, improved heat transference efficiency greatly;
2, the raising of boiler efficiency is reduced coal consumption greatly;
3, eliminated the negative pressure fluctuation and to the influence of fire inspection stability significantly of the burner hearth that causes because of the ash that collapses in the boiler operatiopn, the security of boiler is improved greatly;
4, implement to purge automatically according to the dust stratification degree, avoided blindly blowing the economic loss that ash brings.
Description of drawings
Fig. 1 is denoted as among the figure for the structured flowchart of a boiler furnace arch, furnace nose slope of the present invention and a specific embodiment of the automatic purging system of horizontal flue;
The 1-purge nozzle,
The 2-check valve,
The 3-temperature measuring equipment,
4-purges controller.
The specific embodiment
As shown in Figure 1, the CH-CHPZ type Wear-resistant, high-temperature resistant nozzle that the boiler furnace arch, furnace nose slope of composition this embodiment of the invention and the purge nozzle of the automatic purging system of horizontal flue 1 adopt Hunan Province Xiangdian Test ﹠ Research Institute Co., Ltd. to produce is organized four arranged side by side, two groups.Every group of purge nozzle 1 check valve 2 in parallel.The output pipe of check valve 2 connects the input of purge nozzle 1.The DC48V type check valve that the check valve 2 of purge nozzle 1 adopts Omron (China) Co., Ltd to produce.Purge nozzle 1 is installed on the fin between the boiler water-wall tube.The input pipe of check valve 2 connects the output of peripheral hardware blowing medium pipe-line transportation system.The temperature measuring equipment 3 of native system adopts commercially available Hunan China step information system Co., Ltd made H-RASF type thermojunction type temperature measurer earlier.The XD-CHCQ type that the purging controller 4 of native system then adopts Hunan Province Xiangdian Test ﹠ Research Institute Co., Ltd. to produce purges controller automatically.The output of above-mentioned temperature measuring equipment 3 connects the input of described purging controller 4 by shielded cable, and the output that purges controller 4 connects the input of check valve 2 by shielded cable.
Claims (1)
1. boiler furnace arch, furnace nose slope and the automatic purging system of horizontal flue, it is characterized in that, it is by the purge nozzle (1) and the temperature measuring equipment (3) of at least two group band check valves (2), purging controller (4) forms, the output pipe of the input of wherein said purge nozzle (1) and described check valve (2) connects, the input pipe of described check valve (2) connects the output of peripheral hardware blowing medium pipe-line transportation system, the output of described temperature measuring equipment (3) connects the input of described purging controller (4) by shielded cable, and the output of described purging controller (4) also connects the input of the check valve (2) of described purge nozzle (1) by shielded cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124033 CN101852440A (en) | 2010-03-15 | 2010-03-15 | Automatic purging system of furnace arch slope and horizontal flue of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010124033 CN101852440A (en) | 2010-03-15 | 2010-03-15 | Automatic purging system of furnace arch slope and horizontal flue of boiler |
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| CN101852440A true CN101852440A (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010124033 Pending CN101852440A (en) | 2010-03-15 | 2010-03-15 | Automatic purging system of furnace arch slope and horizontal flue of boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN103672918A (en) * | 2013-12-31 | 2014-03-26 | 北京中科通用能源环保有限责任公司 | Circulating fluidized bed waste incineration boiler and flue gas cooling chamber for same |
| CN104197344A (en) * | 2014-09-01 | 2014-12-10 | 华电电力科学研究院 | Soot blowing method and device for W-flame boiler wind chamber |
| CN104964298A (en) * | 2015-06-02 | 2015-10-07 | 李京斌 | Boiler self-suction air energy ash gun |
| CN112594683A (en) * | 2020-12-15 | 2021-04-02 | 安徽长江钢铁股份有限公司 | Nitrogen purging system and process for boiler burner |
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| JPH01260208A (en) * | 1988-04-11 | 1989-10-17 | Mitsubishi Heavy Ind Ltd | Combustion ash accumulation preventive device |
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| CN201203132Y (en) * | 2008-04-17 | 2009-03-04 | 哈尔滨瑞尔能源技术有限公司 | Novel initiating apparatus of gas pulse soot blower |
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2010
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN103672918A (en) * | 2013-12-31 | 2014-03-26 | 北京中科通用能源环保有限责任公司 | Circulating fluidized bed waste incineration boiler and flue gas cooling chamber for same |
| CN104197344A (en) * | 2014-09-01 | 2014-12-10 | 华电电力科学研究院 | Soot blowing method and device for W-flame boiler wind chamber |
| CN104197344B (en) * | 2014-09-01 | 2017-01-11 | 华电电力科学研究院 | Soot blowing method and device for W-flame boiler wind chamber |
| CN104964298A (en) * | 2015-06-02 | 2015-10-07 | 李京斌 | Boiler self-suction air energy ash gun |
| CN112594683A (en) * | 2020-12-15 | 2021-04-02 | 安徽长江钢铁股份有限公司 | Nitrogen purging system and process for boiler burner |
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Application publication date: 20101006 |