CN101629716B - Vertical arrangement method of low-NOx solid-liquid state deslagging pulverized coal burner - Google Patents
Vertical arrangement method of low-NOx solid-liquid state deslagging pulverized coal burner Download PDFInfo
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- CN101629716B CN101629716B CN2009101946058A CN200910194605A CN101629716B CN 101629716 B CN101629716 B CN 101629716B CN 2009101946058 A CN2009101946058 A CN 2009101946058A CN 200910194605 A CN200910194605 A CN 200910194605A CN 101629716 B CN101629716 B CN 101629716B
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Abstract
The invention relates to a vertical arrangement method of a low-NOx solid-liquid state deslagging pulverized coal burner. The method comprises the following steps: firstly, sequentially mounting an air preheater and a coal economizer on a tail flue of a boiler; vertically arranging a low NOx pulverized coal burner at one side of the boiler; arranging a hopper-type slag bath below the low NOx pulverized coal burner the outlet of which is respectively communicated with the hearth bottom of the boiler and the hopper-type slag bath; respectively communicating an outlet of the low NOx pulverized coal burner with the hearth bottom of the boiler and the hopper-type slag bath; then, respectively connecting a preheating air outlet of the air preheater and a primary air coal pipe with a secondary air inlet and a primary air inlet of the low NOx pulverized coal burner; mounting a second electronic automatic igniter and a flame combustion detection controller on the low NOx pulverized coal burner; and mounting a secondary air electric ratio adjusting valve in a pipeline connecting the air preheater and the low NOx pulverized coal burner. The invention has the advantage that the burner has a large load-adjusting range without changing the combustion efficiency.
Description
Technical field
The present invention relates to a kind of low-NOx solid, liquid state deslagging pulverized coal burner vertical arrangement method, belong to the layout using method technical field of the burner of industry coal-boilers such as steam, hot-water boiler, forge furnace and kiln.
Background technology
At application number is 200910046547.4, and the applying date is on February 24th, 2009, and name is called the method for arranging that discloses a kind of low-NOx solid attitude coal dust firing in the patent of " a kind of low-NOx solid attitude coal dust combustion method ".In the method, it is horizontally disposed that burner and boiler directly link to each other, and is furnished with leakage apparatus for ash in the boiler furnace bottom.The shortcoming of this layout is, can only be applicable to the dry ash extraction burner, and facts have proved that high-temperature flue gas (burner outlet position) can make the flying dust softening transform and form liquid lime-ash when heavy-duty service for a long time, and flying dust is easy to pollute radiation heating-surface and convection heating surface, causes the thermal efficiency to reduce and the eroding water cold wall pipe.
Summary of the invention
The purpose of this invention is to provide a kind of big coal burner vertical arrangement method of adjusting range of when not changing efficiency of combustion, loading.
In order to achieve the above object, technical scheme of the present invention has provided a kind of low-NOx solid, liquid state deslagging pulverized coal burner vertical arrangement method, the steps include:
Step 4, be arranged vertically low-NOx pulverized coal burner in a side of boiler, at the funneling molten slag bath of the arranged beneath of low-NOx pulverized coal burner, the outlet of low-NOx pulverized coal burner communicates with the burner hearth bottom and the funneling molten slag bath of boiler respectively;
The present invention is provided with funneling molten slag bath in the vertically arranged bottom of burner (exit).Lime-ash directly forms liquid down at high temperature (1650～1700 ℃) during high load capacity (greater than 50%) operation.Liquid slag in the adherent granulation slag bath that is displaced downwardly to appointment, is discharged by dragveyer under the centrifugal action of secondary wind.Under this operating mode, retention efficiency can reach 85% during operation.Remaining 15% is taken away by flue gas with the flying dust form, and in the sedimentation of the ascent stage of burner hearth, falls furnace bottom and collect through conical hopper, is then discharged by specific ash discharging hole.In underload (below 50%) when operation, is low because of the molten slag bath temperature, and the flying dust that burns enters burner hearth with flue gas, and sedimentation falls into furnace bottom in the ascent stage, is collected by conical hopper and discharges out of the furnace.The present invention does not change burner, Gu efficiency of combustion is constant.But this layout makes burner load adjusting range bigger, is suitable for the big operation characteristic of Industrial Boiler load fluctuation, is easy to popularize and popular and commercialization popularization.
Advantage of the present invention is that the burner adjusting range of loading when not changing efficiency of combustion is big, avoided the low lime-ash of slag tap combustion system molten slag bath temperature when underrun to enter burner hearth with the flying dust form, be heated and convection heating surface thereby pollute radiation, cause heat exchanger effectiveness to reduce.
Description of drawings
Fig. 1 is a layout schematic diagram of the present invention.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
In conjunction with Fig. 1 a kind of low-NOx solid provided by the invention, liquid state deslagging pulverized coal burner vertical arrangement method are described, the steps include:
Step 4, be arranged vertically low-NOx pulverized coal burner 10 in a side of boiler 20, at the funneling molten slag bath 16 of the arranged beneath of low-NOx pulverized coal burner 10, the outlet of low-NOx pulverized coal burner 10 communicates with the burner hearth bottom and the funneling molten slag bath 16 of boiler 20 respectively;
Claims (1)
1. a low-NOx solid, liquid state deslagging pulverized coal burner vertical arrangement method the steps include:
Step 1, air preheater (19) and economizer (18) are installed successively on the back-end ductwork of boiler (20);
Step 2, manually gate valve (3), electronic sealing blanking device (4) and impact flow meter (5) are connected in the outlet of the Pulverized Coal Bin (2) that is provided with breather valve (21) successively, impact flow meter (5) connects spiral pneumatic conveying pump (7) by connecting hose (6), spiral pneumatic conveying pump (7) connects the first damping trunnion (8) and the first electronics automatic ignitor (11) respectively by three-way pipe, is provided with explosion proof door (1) at the top of described Pulverized Coal Bin (2);
Step 3, on the air outlet of primary air fan (15), insert an airduct (14), connect the first electronics automatic ignitor (11) by the second damping trunnion (8) again, go up at the first damping trunnion (8) and connect a wind coal pipe (9), it is characterized in that,
Step 4, be arranged vertically low-NOx pulverized coal burner (10) in a side of boiler (20), the funneling molten slag bath of arranged beneath (16) at low-NOx pulverized coal burner (10), the outlet of low-NOx pulverized coal burner (10) communicates with the burner hearth bottom and the funneling molten slag bath (16) of boiler (20) respectively, is provided with at least one automatic soot blower (17) in the bottom of described boiler (20);
Step 5, an outlet of the preheated air of air preheater (19) and a wind coal pipe (9) are connected with secondary wind inlet and a wind inlet of low-NOx pulverized coal burner (10) respectively, pack on low-NOx pulverized coal burner (10) the second electronics automatic ignitor (21) and flame combustion detects controller (12), and in air preheater (19) connects the pipeline of low-NOx pulverized coal burner (10) the secondary wind-powered electricity generation is installed and moved ratio adjusting valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101946058A CN101629716B (en) | 2009-08-26 | 2009-08-26 | Vertical arrangement method of low-NOx solid-liquid state deslagging pulverized coal burner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101946058A CN101629716B (en) | 2009-08-26 | 2009-08-26 | Vertical arrangement method of low-NOx solid-liquid state deslagging pulverized coal burner |
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| CN101629716A CN101629716A (en) | 2010-01-20 |
| CN101629716B true CN101629716B (en) | 2011-10-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825276B (en) * | 2010-04-26 | 2011-06-29 | 中国科学院广州能源研究所 | Energy-saving environment-friendly liquid slag removal type coal-fired heating system |
| CN101915420B (en) * | 2010-05-19 | 2012-02-22 | 上海题桥能源科技发展有限公司 | Low-NOx solid and liquid deslagging dual-swirl coal-dust combustion device |
| CN101936525B (en) * | 2010-09-27 | 2012-05-30 | 上海交通大学 | Low NOx rotational flow coal dust combustion device of industrial boiler |
| CN110056902B (en) * | 2019-04-03 | 2023-11-28 | 华电电力科学研究院有限公司 | System for preventing wet mechanical slag discharging boiler from burning off and extinguishing fire and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058855A (en) * | 1998-07-20 | 2000-05-09 | D. B. Riley, Inc. | Low emission U-fired boiler combustion system |
| CN1599854A (en) * | 2001-10-05 | 2005-03-23 | 川崎重工业株式会社 | Ash melting type u-firing combustion boiler and method of operating the boiler |
| CN101201167A (en) * | 2007-12-25 | 2008-06-18 | 哈尔滨工业大学 | Apparatus and method for gasification of refuse and hyperthermia melt processing of flying ash |
| CN101487589A (en) * | 2009-02-24 | 2009-07-22 | 上海题桥纺织染纱有限公司 | Low NOX dry ash extraction coal powder burning method |
-
2009
- 2009-08-26 CN CN2009101946058A patent/CN101629716B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058855A (en) * | 1998-07-20 | 2000-05-09 | D. B. Riley, Inc. | Low emission U-fired boiler combustion system |
| CN1599854A (en) * | 2001-10-05 | 2005-03-23 | 川崎重工业株式会社 | Ash melting type u-firing combustion boiler and method of operating the boiler |
| CN101201167A (en) * | 2007-12-25 | 2008-06-18 | 哈尔滨工业大学 | Apparatus and method for gasification of refuse and hyperthermia melt processing of flying ash |
| CN101487589A (en) * | 2009-02-24 | 2009-07-22 | 上海题桥纺织染纱有限公司 | Low NOX dry ash extraction coal powder burning method |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2002-5421A 2002.01.09 |
| JP特开平8-303756A 1996.11.22 |
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