CN1924438A - Self-declining type circulating ash cooling device and treatment method for circulating ash - Google Patents
Self-declining type circulating ash cooling device and treatment method for circulating ash Download PDFInfo
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- CN1924438A CN1924438A CN 200610104576 CN200610104576A CN1924438A CN 1924438 A CN1924438 A CN 1924438A CN 200610104576 CN200610104576 CN 200610104576 CN 200610104576 A CN200610104576 A CN 200610104576A CN 1924438 A CN1924438 A CN 1924438A
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Abstract
This invention relates to self-lowering ash cooling device and recycle ash process method, which comprises the following steps: materials back device and ash tube on bottom; setting expansion degree at ash tube with entrance through dynamic valve and ash tube; the cooling exit and rotation control valve are connected; when in use firstly opening handle valve from back materials through ash tube, handle valve into cooling device under 150 degrees through cooling chamber and then entering high voltage gas through gas transmission tube into ash discharge database.
Description
Technical field
The present invention relates to a kind of circulating ash cooling device and treatment method for circulating ash of recirculating fluidized bed, particularly a kind of self-declining type circulating ash cooling device and treatment method for circulating ash.
Background technology
The CFBB material returning device is only to be provided with a dust leg in the material returning device bottom both at home and abroad at present.This kind processing method can produce excessive circulating ash for the CFB boiler that uses the ash-rich colm, produce a series of problems thus: fire box temperature descends, especially the decline of emulsion zone temperature is bigger, even to below 800 ℃, causes end slag imperfect combustion share to increase; Because wear extent and ash concentration are proportional, institute is so that furnace wall cooling wearing and tearing aggravation; The afterbody ash concentration increases, the back-end surfaces serious wear; The deduster inlet concentration increases, smoke evacuation dust concentration severe overweight; The air-introduced machine wearing and tearing increase; The unit power consumption increases, and especially the deduster inlet concentration increases, and smoke evacuation dust concentration severe overweight problem has become the great environmental issue that occurs in the CFB boiler operatiopn.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of simple in structure, can alleviate heating surface wear, improve the emulsion zone temperature, help end slag after-flame, improve boiler efficiency, the boiler back end ductwork ash concentration is reduced, wearing and tearing alleviate, self-declining type circulating ash cooling device and treatment method for circulating ash that the unit power consumption reduces.
For achieving the above object, self-declining type circulating ash cooling device of the present invention is: the dust leg that comprises material returning device and be arranged on the material returning device bottom, be characterized in: dust leg is provided with expansion joint, the inlet of cooler is connected with dust leg by manually-operated gate, and the outlet of cooler is connected with rotary control valve; The outlet of rotary control valve is connected with Pneumatic conveying pipeline; Cooler is the helix structure.
Treatment method for circulating ash of the present invention is: at first open manually-operated gate, the circulating ash of being discharged by material returning device enters cooler by dust leg, manually-operated gate, circulating ash is cooled to below 150 ℃ through cooler, discharges the back by rotary control valve and by the gases at high pressure that feed in the Pneumatic conveying pipeline circulating ash is entered grey storehouse.
Because the present invention is after installing cooling device additional on the dust leg, improved the runnability of burning inferior coal CFBB greatly, the fire box temperature level is raise than before, especially the emulsion zone variations in temperature is obvious, can reach its design temperature level, help end slag burning fully; The furnace wall cooling wearing and tearing alleviate; The afterbody ash concentration reduces, corresponding the alleviating of back-end surfaces wearing and tearing; The deduster inlet concentration reduces, and can reach a national class environmental protection standard requirement, and the air-introduced machine wearing and tearing alleviate; The unit power consumption reduces, the corresponding decline of station service power consumption rate; Boiler thermal output is improved.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is the structural representation of cooler 5 of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1,2, the dust leg 2 that the present invention includes material returning device 1 and be arranged on the material returning device bottom, dust leg 2 is provided with expansion joint 3, the inlet of cooler 5 is connected with dust leg 2 by manually-operated gate 4, and the outlet of cooler 5 is connected with rotary control valve 6, and the heating surface of this cooler 5 adopts the helix structure, the cooler 5 of present embodiment adopts the multi-layer helical heating surface of tubes of coaxial arrangement, and the outlet of rotary control valve 6 is connected with Pneumatic conveying pipeline 7.
Processing method of the present invention is as follows: at first open manually-operated gate 4, the circulating ash of being discharged by material returning device 1 enters cooler 5 by dust leg 2, manually-operated gate 4, circulating ash is cooled to below 150 ℃ through cooler 5, discharges the back by rotary control valve 6 and by the gases at high pressure that feed in the Pneumatic conveying pipeline 7 circulating ash is entered grey storehouse.
The course of work of the present invention:
Go into the ash of going in the stove ribbing and be divided into three parts: a part is end slag, and a part is a flying dust, and a part is a circulating ash.When boiler normally moved, these three kinds ashes can form an equilibrium relation.And for the CFB boiler that uses the ash-rich colm, can form excessive circulating ash in the burner hearth, thereby cause a series of problems, so must solve problem by discharging a part of circulating ash, install additional after the cooler 5, circulating ash is except that normal returning charge, and some superfluous circulating ash is drained after handling by dust leg 2 and cooler 5, thereby solve the infringement that excessive circulating ash causes the CFB boiler, also make dust emission concentration reach the national environmental standard requirement simultaneously.
The present invention increases the circulating ash discharge treating system can keep rational circulating ash quantity in the stove, guarantees suitable bed of material differential pressure, and the wearing and tearing that alleviate heating surface improve the emulsion zone temperature, help end slag after-flame, and boiler efficiency improves.The boiler back end ductwork ash concentration reduces, and wearing and tearing alleviate.The air-introduced machine wearing and tearing alleviate, and power consumption reduces.
Claims (4)
1, a kind of self-declining type circulating ash cooling device, the dust leg (2) that comprises material returning device (1) and be arranged on material returning device (1) bottom, it is characterized in that: dust leg (2) is provided with expansion joint (3), the inlet of cooler (5) is connected with dust leg (2) by manually-operated gate (4), and the outlet of cooler (5) is connected with rotary control valve (6).
2, self-declining type circulating ash cooling device according to claim 1 is characterized in that: the outlet of said rotary control valve (6) is connected with Pneumatic conveying pipeline (7).
3, self-declining type circulating ash cooling device according to claim 1 is characterized in that: said cooler (5) is the helix structure.
4, a kind of processing method of circulating ash, it is characterized in that: at first open manually-operated gate (4), the circulating ash of being discharged by material returning device (1) enters cooler (5) by dust leg (2), manually-operated gate (4), circulating ash is cooled to below 150 ℃ through cooler (5), discharges the back by rotary control valve (6) and by the gases at high pressure that feed in the Pneumatic conveying pipeline (7) circulating ash is entered grey storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610104576 CN1924438A (en) | 2006-09-15 | 2006-09-15 | Self-declining type circulating ash cooling device and treatment method for circulating ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610104576 CN1924438A (en) | 2006-09-15 | 2006-09-15 | Self-declining type circulating ash cooling device and treatment method for circulating ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1924438A true CN1924438A (en) | 2007-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610104576 Pending CN1924438A (en) | 2006-09-15 | 2006-09-15 | Self-declining type circulating ash cooling device and treatment method for circulating ash |
Country Status (1)
| Country | Link |
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| CN (1) | CN1924438A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287815A (en) * | 2011-06-22 | 2011-12-21 | 清华大学 | Device for regulating circulating ash flow of circulating fluidized bed boiler |
| CN107490007A (en) * | 2017-07-17 | 2017-12-19 | 无锡华光锅炉股份有限公司 | Cooling furnace apparatus for ash |
| CN107631295A (en) * | 2017-10-31 | 2018-01-26 | 中国华能集团清洁能源技术研究院有限公司 | A kind of circulating ash cools down tapping equipment |
| CN107795985A (en) * | 2017-11-06 | 2018-03-13 | 南京泰润电力工程有限公司 | A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash |
-
2006
- 2006-09-15 CN CN 200610104576 patent/CN1924438A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287815A (en) * | 2011-06-22 | 2011-12-21 | 清华大学 | Device for regulating circulating ash flow of circulating fluidized bed boiler |
| CN107490007A (en) * | 2017-07-17 | 2017-12-19 | 无锡华光锅炉股份有限公司 | Cooling furnace apparatus for ash |
| CN107631295A (en) * | 2017-10-31 | 2018-01-26 | 中国华能集团清洁能源技术研究院有限公司 | A kind of circulating ash cools down tapping equipment |
| CN107795985A (en) * | 2017-11-06 | 2018-03-13 | 南京泰润电力工程有限公司 | A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash |
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Open date: 20070307 |