CN104534457A - Boiler firing inferior coal with low volatile content and high ash content - Google Patents
Boiler firing inferior coal with low volatile content and high ash content Download PDFInfo
- Publication number
- CN104534457A CN104534457A CN201410813404.2A CN201410813404A CN104534457A CN 104534457 A CN104534457 A CN 104534457A CN 201410813404 A CN201410813404 A CN 201410813404A CN 104534457 A CN104534457 A CN 104534457A
- Authority
- CN
- China
- Prior art keywords
- furnace
- boiler
- ash content
- low volatile
- high ash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a boiler firing inferior coal with low volatile content and high ash content and belongs to the technical field of industrial pulverized-coal fired boilers. The boiler is used for solving the problems in ignition and combustion of the pulverized-coal fired boilers firing the inferior coal with low volatile content and high ash content. The boiler firing the inferior coal with low volatile content and high ash content comprises a vertical extended furnace which is fixed at the front part of a furnace body, wherein the vertical 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 bottom of the vertical extended furnace is communicated with a cooling chamber, a slag cooling hopper is arranged at the front end of the furnace hearth outlet, and a slag basin is arranged at the lower part of the slag cooling hopper; a slag coagulating pipe bundle is arranged at the junction of the furnace hearth outlet and the cooling chamber; combustors, an after-combustion air nozzle and furnace arches are arranged on the vertical 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 positions close to the furnace hearth outlet. 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, be specifically related to the boiler of a kind of low volatile, high ash content colm.
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 at present industrial coal powder boiler due to its burner hearth little, fractional cold is large, and combustion space is limited, substantially all uses the fat coal that volatile matter is higher, ash content is lower, is unsuitable for low volatile, high ash content colm.In some areas due to low volatile, high ash content colm, there is ignition of the boiler difficulty, even cannot light, hearth combustion is unstable, and unburned carbon in flue dust is high, often fire extinguishing, detonation, not only cannot ensure the economical operation type of boiler, but also threaten the safety of boiler operatiopn.Application and the popularization of what this was serious limit industrial coal powder boiler.
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, China's fat coal resource is more and more shorter, and its price is also constantly soaring, in order to make full use of the low-quality coal resources of China, reduce industrial boiler operation cost, the industrial coal powder boiler of exploitation low volatile, high ash content colm, has important practical significance to the popularization of industrial coal powder boiler.
Summary of the invention
The present invention is in order to the ignition and combustion problem solving low volatile, the pulverized-coal fired boiler of high ash content colm exists, and provides the boiler of a kind of low volatile, high ash content colm.
The present invention is achieved by the following technical solutions:
A boiler for low volatile, high ash content colm, comprise the vertical expansion furnace being fixed on body of heater front portion, vertical 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; Furnace outlet bottom described vertical expansion furnace is communicated with cooling chamber, and wherein the front end of furnace outlet is provided with slag cooling bucket, and bottom is provided with slag bath; Described furnace outlet and the junction of cooling chamber are provided with Crust blocks pipe bundle; Described vertical expansion furnace 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 in the position near furnace outlet.
Further, described vertical expansion furnace is vertical type 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 vertical expansion furnace 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, in vertical expansion furnace internal upper part arranged tangential 2 ~ 4 groups, during work, downward spiral jet flame is formed in stove, furnace outlet is arranged in the position that burner hearth bottom 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 the top of burner hearth, during work, downward rotating jet flame is formed in stove, furnace outlet is arranged in the position that burner hearth bottom 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.
Described slag cooling bucket is the low structure in anterior high rear portion, and to tilt 10 ~ 15o to furnace outlet, ensures that slag can flow into slag bath smoothly, and is arranging Crust blocks pipe bundle with cooling chamber junction, to make to enter in the flue gas of cooling chamber without slag, ensures 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 vertical expansion furnace and quantity.
Described furnace arch, furnace nose is annular furnace arch, furnace nose, also can be designed to other structures according to flame profile, fluidised form.
The present invention is on the basis of industrial coal powder boiler prior art, the vertical expansion furnace 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 is furnished with furnace arch, furnace nose, makes slag can flow into slag bath smoothly, and is arranging Crust blocks pipe bundle with cooling chamber junction, makes to enter without slag in the flue gas of cooling chamber, ensures 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 embodiment 2;
Fig. 3 is embodiment 3 burner arrangement schematic diagram;
Fig. 4 is the arrangement schematic diagram of 3 expansion furnaces.
Detailed description of the invention
embodiment 1
The boiler of a kind of described low volatile as shown in Figure 1, high ash content colm, comprise the vertical expansion furnace 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 vertical expansion furnace 1 is communicated with cooling chamber 10, and wherein the front end of furnace outlet 8 is provided with slag cooling bucket 6, and bottom is provided with slag bath 7, and described furnace outlet 8 is provided with Crust blocks pipe bundle 9 with the junction of cooling chamber 10; 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 in the position near furnace outlet.
Wherein tangentially spray into breeze airflow and combustion air at two groups of burners 2 on vertical expansion furnace 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 in the middle and lower part of expansion furnace, lime-ash exists with molten condition, and final slag flows out slag cooling bucket 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
The boiler of a kind of described low volatile as shown in Figure 2, high ash content colm, 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 vertical expansion furnace to use low-ash-fusion coal as shown in Figure 3, comprise the vertical expansion furnace 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 vertical expansion furnace 1 is communicated with cooling chamber 10, and wherein the front end of furnace outlet 8 is provided with slag cooling bucket 6, and bottom is provided with slag bath 7, and described furnace outlet 8 is provided with Crust blocks pipe bundle 9 with the junction of cooling chamber 10; 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 in the position near furnace outlet.
Single vortex burner 2 is provided with wherein in vertical expansion furnace 1 front portion, spray into breeze airflow and combustion air, the thermal-flame of downward helical flow is 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 in the middle and lower part 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 of lower furnace 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. the boiler of the low volatile described in a kind, high ash content colm, it is characterized in that, comprise the vertical expansion furnace (1) being fixed on body of heater front portion, vertical expansion furnace (1) 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 vertical expansion furnace (1) is communicated with cooling chamber (10), wherein the front end of furnace outlet (8) is provided with slag cooling bucket (6), bottom is provided with slag bath (7), and described furnace outlet (8) is provided with Crust blocks pipe bundle (9) with the junction of cooling chamber (10); 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 in the position near furnace outlet.
2. the boiler of low volatile according to claim 1, high ash content colm, is characterized in that, described vertical expansion furnace (1) is vertical type cylinder shape or rectangular configuration, and quantity is 1-4.
3. the boiler of low volatile according to claim 1 and 2, high ash content colm, is characterized in that, described vertical expansion furnace (1) forms adiabatic furnace by refractory material.
4. the boiler of low volatile according to claim 1 and 2, high ash content colm, is characterized in that, described burner (2) is DC burner, arranges 2 ~ 4 groups in expansion furnace upper tangential.
5. the boiler of low volatile according to claim 1 and 2, high ash content colm, is characterized in that, described burner (2) is turbulent burner, is arranged in expansion furnace top.
6. the boiler of low volatile according to claim 1 and 2, high ash content colm, is characterized in that, described slag cooling bucket (6) is the low structure in anterior high rear portion, and to preposition furnace outlet inclination 10-15o.
7. the boiler of low volatile according to claim 1 and 2, high ash content colm, 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 |
|---|---|---|---|
| CN201410813404.2A CN104534457A (en) | 2014-12-24 | 2014-12-24 | Boiler firing inferior coal with low volatile content and high ash content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813404.2A CN104534457A (en) | 2014-12-24 | 2014-12-24 | Boiler firing inferior coal with low volatile content and high ash content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104534457A true CN104534457A (en) | 2015-04-22 |
Family
ID=52850036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410813404.2A Pending CN104534457A (en) | 2014-12-24 | 2014-12-24 | Boiler firing inferior coal with low volatile content and high ash content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104534457A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202535A (en) * | 2015-10-15 | 2015-12-30 | 上海锅炉厂有限公司 | Combustion device suitable for fuels with high alkali metal content |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62102008A (en) * | 1985-10-30 | 1987-05-12 | Hitachi Zosen Corp | Coal-fired boiler with molten ash type burning chamber |
| JPH01129510U (en) * | 1988-02-26 | 1989-09-04 | ||
| 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 |
| CN204420986U (en) * | 2014-12-24 | 2015-06-24 | 山西蓝天环保设备有限公司 | The boiler of a kind of low volatile, high ash content colm |
-
2014
- 2014-12-24 CN CN201410813404.2A patent/CN104534457A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62102008A (en) * | 1985-10-30 | 1987-05-12 | Hitachi Zosen Corp | Coal-fired boiler with molten ash type burning chamber |
| JPH01129510U (en) * | 1988-02-26 | 1989-09-04 | ||
| 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 |
| CN204420986U (en) * | 2014-12-24 | 2015-06-24 | 山西蓝天环保设备有限公司 | The boiler of a kind of low volatile, high ash content colm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202535A (en) * | 2015-10-15 | 2015-12-30 | 上海锅炉厂有限公司 | Combustion device suitable for fuels with high alkali metal content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201954529U (en) | DC (direct current) combustor layout structure of cut oval pulverized coal fired boiler | |
| CN103134049A (en) | Multi-corner tangential multi-scale pulverized coal decoupling combustion device and decoupling combustion method thereof | |
| Du et al. | Industrial measurement of combustion and NOx formation characteristics on a low-grade coal-fired 600MWe FW down-fired boiler retrofitted with novel low-load stable combustion technology | |
| CN103868068B (en) | A kind of high-temperature oxygen direct-fire and surely fire system | |
| CN208901372U (en) | A kind of pulverized-coal fired boiler low NOx combustion system | |
| CN204534550U (en) | Vertical expansion furnace is adopted to use the boiler of low-ash-fusion coal | |
| CN109737389A (en) | A kind of quasi- eastern coal low-temperature burning control system | |
| CN204420985U (en) | Horizontal front burner hearth is adopted to use the boiler of low-ash-fusion coal | |
| CN201606876U (en) | Low-NOx coal burner | |
| CN204420986U (en) | The boiler of a kind of low volatile, high ash content colm | |
| CN202101217U (en) | Biomass steam boiler with horizontal water and fire tubes | |
| CN102128446A (en) | Boiler for carrying out mixed combustion on carbon black tail gas and coal | |
| CN204420987U (en) | The burner of W flame boiler and W flame boiler | |
| CN104534457A (en) | Boiler firing inferior coal with low volatile content and high ash content | |
| CN208025504U (en) | A kind of coal burner | |
| CN206398702U (en) | Burner region variable cross-section adapts to the Pulverized Coal fired Boiler Furnace of flexibility peak regulation | |
| CN104534456A (en) | Low-ash-fusion coal fired boiler adopting horizontal extended furnace | |
| CN201496958U (en) | W-flame cyclone separation low-oil ignition burner | |
| CN201582804U (en) | Tangential-circle swirl combustion equipment of industrial pulverized-coal fired boiler | |
| CN212029567U (en) | Anti-slagging and anti-coking system for blending low ash fusion coal boiler | |
| CN205065700U (en) | Novel high -efficiency biological matter combustor | |
| CN211290021U (en) | Low-nitrogen burner for deep peak shaving pulverized coal boiler | |
| CN203656910U (en) | W flame boiler and combustion device thereof | |
| CN103388820A (en) | Clean pulverized coal combustion industrial boiler device | |
| CN104534458A (en) | Boiler adopting low-ash-fusion coal for combustion of vertical extended furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |
|
| WD01 | Invention patent application deemed withdrawn after publication |