CN104534456A - Low-ash-fusion coal fired boiler adopting horizontal extended furnace - Google Patents
Low-ash-fusion coal fired boiler adopting horizontal extended furnace Download PDFInfo
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- CN104534456A CN104534456A CN201410813000.3A CN201410813000A CN104534456A CN 104534456 A CN104534456 A CN 104534456A CN 201410813000 A CN201410813000 A CN 201410813000A CN 104534456 A CN104534456 A CN 104534456A
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Abstract
The invention discloses a low-ash-fusion coal fired boiler adopting a horizontal extended furnace and belongs to the technical field of industrial pulverized-coal fired boilers. The boiler is used for solving the problem of the existing pulverized-coal fired boilers that furnace hearths are subjected to slag-bonding during the combustion of low-ash-fusion coal. The low-ash-fusion coal fired boiler adopting the horizontal extended furnace comprises the horizontal extended furnace which is fixed at the front part of a furnace body, wherein the horizontal extended furnace is formed by water-cooled walls through enclosing, and fireproof coating layers are laid on the internal surfaces of the water-cooled walls; a furnace hearth outlet of the horizontal extended furnace is communicated with a cooling chamber, a sloping furnace bottom is arranged at the front end of the furnace hearth outlet, a slag coagulating pipe bundle is arranged at the junction of the furnace hearth outlet and the cooling chamber, and a slag basin is arranged at the lower part of the furnace hearth outlet; combustors, an after-combustion air nozzle and furnace arches are arranged on the horizontal extended furnace, the after-combustion air nozzle is arranged at a position which is away from primary air ports of the lowest layer by 4-5 meters, and the furnace arches are arranged at the front part of the sloping furnace bottom. According to the boiler, the structure is simple, the operation is convenient, the problem of slag-bonding of low-ash-fusion pulverized-coal fired boilers can be effectively solved, and the normal operation of the boiler is guaranteed.
Description
Technical field
The invention belongs to industrial coal powder boiler technical field, relate to the industrial coal powder boiler using low-ash-fusion coal, be specifically related to a kind of boiler adopting Horizontal front burner hearth to use low-ash-fusion coal.
Background technology
The thermal-energy equipment that coal-burned industrial boiler generally adopts as each field of Chinese society, certain progress is all obtained in recent years in equipment technology, operational management, but do not change poor efficiency, extensive situation generally, analyze its reason and mainly contain fuel mass, burning and many-sided reason such as equipment, pollution control and monitoring, operational management etc., but core is the problem of burning and equipment technology progress.
Pulverized coal combustion has the advantages such as burn-off rate is high, flue gas heat loss is little, is the leading combustion technology of current large-scale coal-fired electric generation furnace.The current whole nation about have hundreds industrial coal powder boiler, be applied to northern area Winter heat supply or industrial enterprise's heat supply, boiler thermal output is high, and after supporting environmental protecting device, flue gas can clean emission.
But existing pulverized-coal fired boiler is when using low-ash-fusion coal, and Boiler Furnace slagging phenomenon is serious, and frequent blowing out scarfing cinder of having to, makes boiler normally not run, cause boiler operatiopn unstable, overheated temperature raises, the problem of even exhaust gas temperature rising.
Resource exhaustion trend and national energy demand is presented also in ever-increasing situation at a collection of old Energy Base at China east, middle part, some regional industry Fired Pulverized Coal Boilers for Burning low-ash-fusion coals are the unalterable reality of short-term, therefore develop the industrial coal powder boiler using low-ash-fusion coal and have important practical significance.
Summary of the invention
The present invention is to solve existing pulverized-coal fired boiler when using low ash smelting point coal dust, Boiler Furnace slagging problem, and provides a kind of boiler adopting Horizontal front burner hearth to use low-ash-fusion coal.
The present invention is achieved by the following technical solutions:
Adopt Horizontal front burner hearth to use a boiler for low-ash-fusion coal, comprise the Horizontal front burner hearth being fixed on body of heater front portion, Horizontal front burner hearth is gone along with sb. to guard him by water-cooling wall and is formed, and wherein water-cooling wall inner surface lays flame-retardant coating layer; The furnace outlet of described Horizontal front burner hearth is communicated with cooling chamber, and wherein the front end of furnace outlet is provided with at the bottom of uphill furnace, and be provided with Crust blocks pipe bundle with the junction of cooling chamber, bottom is provided with slag bath; Described Horizontal front burner hearth is furnished with burner, fire air nozzle, furnace arch, furnace nose, and fire air nozzle is arranged in apart from orlop primary air nozzle 4 ~ 5 meters of, and furnace arch, furnace nose is arranged at the bottom of uphill furnace anterior.
Further, described Horizontal front burner hearth is Horizontal cylinder shape or rectangular configuration, quantity is 1-4, when installing and using, the quantity of concrete expansion furnace, structure are depending on layout, the coal characteristic of boiler capacity, boiler room, when wherein arranging 3 expansion furnaces, structural representation as shown in Figure 4.
Described Horizontal front burner hearth forms adiabatic furnace by refractory material, does not arrange heating surface in burner hearth, its objective is to become thermal-flame at freeze profile, and ensure coal dust after-flame in the confined space, slag flows out burner hearth bottom in liquid form.
Described burner is DC burner, Horizontal front furnace front arranged tangential 2 ~ 4 groups, during work, spiral jet flame is backward formed in stove, furnace outlet is arranged in the position that burner hearth rear portion is connected with cooling chamber, arrange fire air nozzle apart from orlop primary air nozzle 4 ~ 5 meters of, while guarantee efficiency of combustion, reduce NOx emission.
Described burner is turbulent burner, be arranged in furnace front, during work, rotating jet flame is backward formed in stove, furnace outlet is arranged in the position that burner hearth rear portion is connected with cooling chamber, turbulent burner adopts large recirculating zone, the burner of the high swirling number of strong expansion, reduces NOx emission while also adopting fuel staging and burnout degree structure to ensure efficiency of combustion.
It is the low structure in anterior high rear portion at the bottom of described uphill furnace, and to preposition furnace outlet inclination 10 ~ 15o, ensure that slag can flow into slag bath smoothly, and Crust blocks pipe bundle is being set with cooling chamber junction, make to enter without slag in the flue gas of cooling chamber, ensure cooling chamber not slagging scorification.
Described cooling chamber is gone along with sb. to guard him by water-cooling wall and is formed, and is arranged to suitable rectangular cross section structure, adopts suitable volume heat load flue gas to be dropped to rational temperature and enter afterbody convection pass according to the arrangement form of Horizontal front burner hearth and quantity.
The present invention is on the basis of industrial coal powder boiler prior art, the inclination Horizontal front burner hearth of one or more circle or rectangle is set in the front portion of boiler, burner hearth can should lay fireproof coating by water-cooling wall inner surface or form adiabatic furnace with refractory material, to form thermal-flame, ensure coal dust after-flame in the confined space, slag flows out burner hearth bottom in liquid form; The primary air nozzle of fuel staging and the DC burner of fire air nozzle can be adopted at expansion furnace inner burner, arrange 2 ~ 4 groups in upper tangential, in stove, form downward spiral jet flame; Also can arrange in expansion furnace front portion the turbulent burner adopting fuel staging and burnout degree structure, in stove, form downward rotating jet flame, while ensureing efficiency of combustion, reduce NOx emission; Burner hearth bottom is arranged at the bottom of uphill furnace, and be furnished with furnace arch, furnace nose, furnace arch, furnace nose shape can be designed to different structure according to flame profile, fluidised form, make slag can flow into slag bath smoothly, and Crust blocks pipe bundle is being set with cooling chamber junction, make to enter without slag in the flue gas of cooling chamber, ensure cooling chamber not slagging scorification.
Structure of the present invention is simple, easy to operate, effectively can solve low-ash-fusion coal powder boiler scaling problem, ensures the normal operation of boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of arrangement of burner in embodiment 2;
Fig. 3 is the structural representation of embodiment 3;
Fig. 4 is the arrangement schematic diagram of 3 expansion furnaces.
Detailed description of the invention
Embodiment 1
A kind of boiler adopting Horizontal front burner hearth to use low-ash-fusion coal as shown in Figure 1, comprise the Horizontal front burner hearth 1 being fixed on body of heater front portion, the furnace wall 5 of expansion furnace is gone along with sb. to guard him by water-cooling wall and is formed, and wherein water-cooling wall inner surface lays flame-retardant coating layer; The furnace outlet 8 of described Horizontal front burner hearth 1 is communicated with cooling chamber 10, and wherein the front end of furnace outlet 8 to be provided with at the bottom of uphill furnace 6, and be provided with Crust blocks pipe bundle 9 with the junction of cooling chamber 10, bottom is provided with slag bath 7; Described expansion furnace is furnished with burner 2, fire air nozzle 3, furnace arch, furnace nose 4, fire air nozzle 3 is arranged in apart from orlop primary air nozzle 4 ~ 5 meters of, and furnace arch, furnace nose 4 is arranged at the bottom of uphill furnace anterior.
Wherein tangentially spray into breeze airflow and combustion air at two groups of burners 2 on Horizontal front burner hearth 1 top, the thermal-flame of helical flow is backward formed in stove, the flame region of high temperature is formed in downstream, cross section, burner after-flame air port 3, at guarantee coal dust in the confined space while after-flame, hot conditions is kept at the postmedian of expansion furnace, lime-ash exists with molten condition, and final slag to flow out at the bottom of uphill furnace 6 in liquid form, enters slag bath 7; Flue gas, by the furnace outlet 8 at burner hearth rear portion, enters cooling chamber 10 by Crust blocks pipe bundle 9, and ensureing to enter in the flue gas of cooling chamber does not have caking property ash, is not formed at cooling chamber and back-end surfaces and stains; Arrange 2 ~ 3 First air spouts and 3 ~ 4 alternate layouts of overfire air port, First air adopts fuel staging structure, and the circle of contact of First air and Secondary Air is arranged to not equal diameter, the little circle of contact of First air, the large circle of contact of Secondary Air; Arranging fire air nozzle apart from orlop primary air nozzle 4 ~ 5 meters of, on the basis of fuel staging, have employed Researched of Air Staging Combustion Burning Pulverized Coal, while guarantee efficiency of combustion, reducing NOx emission.
Embodiment 2
A kind of boiler adopting Horizontal front burner hearth to use low-ash-fusion coal as shown in Figure 2, expansion furnace 1 is furnished with four groups of burners 2 and tangentially sprays into burner hearth, and other structures are with embodiment 1.It is large that this structure is applicable to boiler capacity, the situation that expansion furnace cross section is larger.
Embodiment 3
A kind of boiler adopting Horizontal front burner hearth to use low-ash-fusion coal as shown in Figure 3, comprise the Horizontal front burner hearth 1 being fixed on body of heater front portion, the furnace wall 5 of expansion furnace is gone along with sb. to guard him by water-cooling wall and is formed, and wherein water-cooling wall inner surface lays flame-retardant coating layer; The furnace outlet 8 of described Horizontal front burner hearth 1 is communicated with cooling chamber 10, and wherein the front end of furnace outlet 8 to be provided with at the bottom of uphill furnace 6, and be provided with Crust blocks pipe bundle 9 with the junction of cooling chamber 10, bottom is provided with slag bath 7; Described expansion furnace is furnished with burner 2, fire air nozzle 3, furnace arch, furnace nose 4, fire air nozzle 3 is arranged in apart from orlop primary air nozzle 4 ~ 5 meters of, and furnace arch, furnace nose 4 is arranged at the bottom of uphill furnace anterior.
Single vortex burner 2 is provided with wherein in Horizontal front burner hearth 1 front portion, spray into breeze airflow and combustion air, the thermal-flame of helical flow is backward formed in stove, the flame region of high temperature is formed in downstream, cross section, burner after-flame air port 3, ensureing coal dust in the confined space while after-flame, keep hot conditions at the postmedian of expansion furnace, lime-ash exists with molten condition, final slag to flow out at the bottom of uphill furnace 6 in liquid form, enters slag bath 7; Flue gas, by the furnace outlet 8 at burner hearth rear portion, enters cooling chamber 10 by Crust blocks pipe bundle 9, and ensureing to enter in the flue gas of cooling chamber does not have caking property ash, does not form the slag of bonding at cooling chamber and back-end surfaces; Coal burner adopts fuel staging structure, and Secondary Air adopts helical twisted blades, angle 60 ~ 65 degree, Secondary Air enlarging 15 ~ 45 degree; Arranging fire air nozzle apart from orlop primary air nozzle 4 ~ 5 meters of, on the basis of fuel staging, have employed Researched of Air Staging Combustion Burning Pulverized Coal, while guarantee efficiency of combustion, reducing NOx emission.
Claims (7)
1. adopt Horizontal front burner hearth to use a boiler for low-ash-fusion coal, it is characterized in that, comprise the Horizontal front burner hearth (1) being fixed on body of heater front portion, expansion furnace is gone along with sb. to guard him by water-cooling wall and is formed, and wherein water-cooling wall inner surface lays flame-retardant coating layer; The furnace outlet (8) of described Horizontal front burner hearth (1) is communicated with cooling chamber (10), and wherein the front end of furnace outlet (8) is provided with (6) at the bottom of uphill furnace, is provided with Crust blocks pipe bundle (9) with the junction of cooling chamber (10), and bottom is provided with slag bath (7); Described expansion furnace is furnished with burner (2), fire air nozzle (3), furnace arch, furnace nose (4), fire air nozzle (3) is arranged in apart from orlop primary air nozzle 4 ~ 5 meters of, and furnace arch, furnace nose (4) is arranged at the bottom of uphill furnace anterior.
2. employing Horizontal front burner hearth according to claim 1 uses the boiler of low-ash-fusion coal, it is characterized in that, described Horizontal front burner hearth (1) is Horizontal cylinder shape or rectangular configuration, and quantity is 1-4.
3. employing Horizontal front burner hearth according to claim 1 and 2 uses the boiler of low-ash-fusion coal, it is characterized in that, described Horizontal front burner hearth (1) forms adiabatic furnace by refractory material.
4. employing Horizontal front burner hearth according to claim 1 and 2 uses the boiler of low-ash-fusion coal, it is characterized in that, described burner (2) is DC burner, in the anterior arranged tangential 2-4 group of Horizontal front burner hearth (1).
5. employing Horizontal front burner hearth according to claim 1 and 2 uses the boiler of low-ash-fusion coal, it is characterized in that, described burner (2) is turbulent burner, is arranged in Horizontal front burner hearth (1) anterior.
6. employing Horizontal front burner hearth according to claim 1 and 2 uses the boiler of low-ash-fusion coal, it is characterized in that, (6) at the bottom of described uphill furnace are the low structure in anterior high rear portion, and to Horizontal front burner hearth (1) outlet-inclined impeller vane 10 ~ 15o.
7. employing Horizontal front burner hearth according to claim 1 and 2 uses the boiler of low-ash-fusion coal, it is characterized in that, described cooling chamber (10) is gone along with sb. to guard him by water-cooling wall and formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813000.3A CN104534456A (en) | 2014-12-24 | 2014-12-24 | Low-ash-fusion coal fired boiler adopting horizontal extended furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410813000.3A CN104534456A (en) | 2014-12-24 | 2014-12-24 | Low-ash-fusion coal fired boiler adopting horizontal extended furnace |
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| CN104534456A true CN104534456A (en) | 2015-04-22 |
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| CN201410813000.3A Pending CN104534456A (en) | 2014-12-24 | 2014-12-24 | Low-ash-fusion coal fired boiler adopting horizontal extended furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606602A (en) * | 2017-09-21 | 2018-01-19 | 哈尔滨工业大学 | A kind of horizontal boiler of SNCR and OFA interlaced arrangements |
Citations (7)
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|---|---|---|---|---|
| DE940058C (en) * | 1952-02-06 | 1956-03-08 | Babcock & Wilcox Dampfkessel W | Process for preparing and burning a moist fuel |
| US4785746A (en) * | 1985-04-25 | 1988-11-22 | Trw Inc. | Carbonaceous slurry combustor |
| US5020455A (en) * | 1990-01-11 | 1991-06-04 | Chiba City & Tsukishima Kikai Kubushiki Kaisha | System for treating waste material in a molten state |
| JP2001280616A (en) * | 2000-03-31 | 2001-10-10 | Babcock Hitachi Kk | Melting furnace |
| CN2814149Y (en) * | 2005-03-19 | 2006-09-06 | 秦皇岛冶金机械有限公司 | Combustion apparatus with powder coal as fuel |
| CN102072483A (en) * | 2010-12-13 | 2011-05-25 | 青岛海众环保锅炉股份有限公司 | Water, coal and petroleum slag mixed slurry burning heat-conducting oil furnace |
| CN204420985U (en) * | 2014-12-24 | 2015-06-24 | 山西蓝天环保设备有限公司 | Horizontal front burner hearth is adopted to use the boiler of low-ash-fusion coal |
-
2014
- 2014-12-24 CN CN201410813000.3A patent/CN104534456A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE940058C (en) * | 1952-02-06 | 1956-03-08 | Babcock & Wilcox Dampfkessel W | Process for preparing and burning a moist fuel |
| US4785746A (en) * | 1985-04-25 | 1988-11-22 | Trw Inc. | Carbonaceous slurry combustor |
| US5020455A (en) * | 1990-01-11 | 1991-06-04 | Chiba City & Tsukishima Kikai Kubushiki Kaisha | System for treating waste material in a molten state |
| JP2001280616A (en) * | 2000-03-31 | 2001-10-10 | Babcock Hitachi Kk | Melting furnace |
| CN2814149Y (en) * | 2005-03-19 | 2006-09-06 | 秦皇岛冶金机械有限公司 | Combustion apparatus with powder coal as fuel |
| CN102072483A (en) * | 2010-12-13 | 2011-05-25 | 青岛海众环保锅炉股份有限公司 | Water, coal and petroleum slag mixed slurry burning heat-conducting oil furnace |
| CN204420985U (en) * | 2014-12-24 | 2015-06-24 | 山西蓝天环保设备有限公司 | Horizontal front burner hearth is adopted to use the boiler of low-ash-fusion coal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606602A (en) * | 2017-09-21 | 2018-01-19 | 哈尔滨工业大学 | A kind of horizontal boiler of SNCR and OFA interlaced arrangements |
| CN107606602B (en) * | 2017-09-21 | 2019-04-16 | 哈尔滨工业大学 | A kind of horizontal boiler of SNCR and OFA interlaced arrangement |
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Application publication date: 20150422 |