CN2166315Y - Revolving grates boiler tank structure for coal projection machine - Google Patents
Revolving grates boiler tank structure for coal projection machine Download PDFInfo
- Publication number
- CN2166315Y CN2166315Y CN 92217192 CN92217192U CN2166315Y CN 2166315 Y CN2166315 Y CN 2166315Y CN 92217192 CN92217192 CN 92217192 CN 92217192 U CN92217192 U CN 92217192U CN 2166315 Y CN2166315 Y CN 2166315Y
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- arch
- coal
- burner hearth
- boiler
- projection machine
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Abstract
The utility model discloses a revolving grate boiler hearth structure for a coal projection machine, and belongs to the hearth structure of a revolving grates coal burning steam boiler for a coal projection machine. The utility model is designed for solving the problem that the flue gas and smoke of a boiler for a coal projection machine badly contaminate environment. A front water cooling wall tube is bended and cast to form a front flat arch, and a back water cooling wall tube is bended and cast to form a back flat arch. An alpha combustion area and an S-shaped combustion zone are formed in the boiler, which prolongs the traveling length and the combustion time of coal granules. The revolving grate boiler hearth structure for a coal projection machine has good smoke and dust removing effect and energy saving, and improves the combustion efficiency and the heat intensity of a hearth.
Description
The utility model belongs to a kind of chamber structure of spreader feeder forward-moving grate coal-fired steam boiler.
Spreader feeder forward-moving grate boiler, be that fire coal (particle diameter is below 35 millimeters) is delivered to spreader feeder, rely on the rotation of throwing the coal oar, with certain angle, be thrown into burner hearth, coarse granule is track parabolically, drops down onto traveling-grate stoker top, and fine breeze suspends in the space and promptly produces burning, traveling-grate stoker is driven by reducing gear, by reversing slowly to the stokehold behind the stove, coal is after burning on the fire grate, and slag falls into pit from the stokehold.The characteristics of burning so this type of furnace had both been had family, the characteristics that have grate firing to burn again.This furnace type structure is tight, coal adaptability is wide, and Load Regulation is flexible.Produce for a long time in China's boiler manufacturing.Especially with 10 tons/time, 20 tons/time, 35 tons/time product more.But because the chamber structure of this kind boiler; smoke abatement and dust control is considered not enough; though design is repeatedly revised by manufacturing firm such as Shandong Jinan Boiler Plant; and AZD20-25/400 type stove is modified as DZD20-25/400 type stove; but flue gas, soot emissions still seriously surpass the national environmental protection discharge standard; serious environment pollution needs to be resolved hurrily, to save the future of spreader feeder forward-moving grate boiler.
The purpose of this utility model, be at 20 tons/time spreader feeder forward-moving grate boiler, under the prerequisite that guarantees former boiler structure and characteristics, change chamber structure, the front water wall pipe is stretched into burner hearth above throwing the coal mouth, pour into preceding jack arch with refractory concrete; The rear water wall pipe is stretched into burner hearth, pour into the back jack arch, make it below the arch of front and back, form a α combustion zone with refractory concrete, between the arch of front and back, form a S type combustion zone, eliminate smoke dedusting and improve boiler thermal output, energy savings and a kind of chamber structure of designing thereby reach in the stove.
Accompanying drawing 1, be 20 tons/time spreader feeder forward-moving grate boiler configuration the utility model chamber structure elevation cross-sectional view.
Fig. 2 is the A-A side cutaway view.
As shown: the coal under throwing coal oar ［ 1 ］ send coal bunker ［ 2 ］, be thrown into burner hearth ［ 3 ］, coarse granule falls into the top of traveling-grate stoker ［ 4 ］.Can improve the performance of starting to exchange fire of coal under the heat radiation of rear arch ［ 5 ］, face arch ［ 6 ］ is inclined upwardly, angle of climb α
1=15 °-45 ° jet-actions by hot blast (steam) jet pipe ［ 7 ］, coal feeding wind ［ 8 ］, hot blast (steam) jet pipe ［ 9 ］ impel and form a big α combustion zone in burner hearths ［ 3 ］.Hot blast steam jet ［ 7 ］ ［ 9 ］ spray angle α
3=40 ° ± 3 °.According to different coals, the both walls water screen tube can be built up the one's mother's sister with the refractory matter covering and fire band ［ 10 ］ rear arch ［ 5 ］ angle of elevation α
2=70 ° ± 3 ° flue gases rise between rear arch and face arch, need walk around the face arch tip, impact roof of the furnace, return the exhanst gas outlet of front wall ［ 11 ］ both sides, enter convective region flue ［ 21 ］, thereby form a S type combustion zone, prolonged burning time and the stroke of coal grain in burner hearth, improved the efficiency of combustion and the calorific intensity of whole burner hearth.Flue gas is the transversal flow convection bank in the convective region flue, to the boiler rear portion, compile by smoke box ［ 12 ］, go into economizer ［ 14 ］ through main chimney flue ［ 13 ］, air preheater ［ 15 ］, carry out waste heat exchange after, flue gas is sent the boiler room by smoke pipe ［ 16 ］, through deduster (suggestion adopt utility model 92217191.2# desulfurizing dust-collector) through air-introduced machine, and the smoke stack emission that arrives.During normal the operation, the initial dust content of boiler export is reduced, make the blackness of exhaustion dust concentration reach environmental emission standard.
The utility model is applicable to be transformed existing AZD20-25/400 type and DZD20-25/400 type spreader feeder forward-moving grate boiler.As Fig. 1, preceding water screen tube is bent into face arch hangs comb, 15～45 ° of angle of elevation.Foramen primum welding (or 3.5 millimeter tube expanded joints) with former drum ［ 17 ］.Guarantee straight length routinely greater than 300 millimeters, and draw on the solid steelframe ［ 19 ］ outside with pull hook ［ 18 ］.Hang comb after back water screen tube is bent into, pour into rear arch, 70 ° ± 3 ° of angle of elevation.150～180 millimeters of refractory concrete thickness.Face arch also should stay uniform ash-falling hole ［ 20 ］, to prevent and to reduce that dust stratification enters flue on the face arch.
The utility model, also can use for reference be used for 10 tons/time, 35 tons/time spreader stoker boliler technological transformation on.
The utility model is applied to manufacturing firm, Xin Yidai spreader feeder forward-moving grate boiler then, will become have grate firing, chamber combustion double-combustion superiority, the profitable new product of energy-saving and environmental protection, spreader stoker boliler will obtain unlimited vitality.
Claims (5)
1, the chamber structure of the coal-fired steam boiler of a kind of spreader feeder forward-moving grate, fire coal is thrown into burner hearth from the stokehold by the spreader feeder structure, fire grate behind the stove to the stokehold backward, it is characterized in that: jack arch before wall water screen tube direction burner hearth on throwing the coal mouth in stokehold stretches out and forms, stove rear water wall pipe stretches out, forms the back jack arch to burner hearth, form the α combustion zone below the jack arch of front and back, form S shape combustion zone between the forward and backward jack arch, flue gas goes out burner hearth from both sides, face arch top and enters the convective region flue.
2, chamber structure according to claim 1 is characterized in that: the front water wall pipe is pressed angle of climb α
1Be 15 ° of-45 ° of smooth risings and the anti-big concrete of in-site pouring, the face arch that thickness is 150～180 millimeters is connected (can weld or expanded joint) flow development length and is not less than 300 millimeters with drum.
3, chamber structure according to claim 1 is characterized in that: the rear water wall pipe, press angle of climb α from fire grate afterbody top
2Be 70 ° ± 3 ° and smoothly on the stokehold, rise that tear that melting down rises behind the wall is connected with drum open, it stretches out burner hearth partly, all burns to form refractory concrete, the rear arch that thickness is 150～180 millimeters.
4, chamber structure according to claim 1 is characterized in that: front wall peripheral hardware secondary hot-air (steam) collector, on face arch, press α with 2～4 uniform nozzles
3-40 ° ± 3 ° angles spray into the burner hearth middle part, establish secondary heat (steam) collector in the rear arch inner chamber and press α with 2～4 uniform nozzles
3=40 ° ± 3 ° angles are sprayed to burner hearth, produce second-time burning, and arch below, front and back forms less combustion space, burning suburb rate height, and calorific intensity is big, forms S type combustion zone between the arch of front and back.
5, chamber structure according to claim 1 is characterized in that: in the burner hearth that below front and back arches, forms, can be on the furnace wall of both sides topped refractory concrete, form wall with refractory lining, refracto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92217192 CN2166315Y (en) | 1992-06-23 | 1992-06-23 | Revolving grates boiler tank structure for coal projection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92217192 CN2166315Y (en) | 1992-06-23 | 1992-06-23 | Revolving grates boiler tank structure for coal projection machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2166315Y true CN2166315Y (en) | 1994-05-25 |
Family
ID=33765089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92217192 Expired - Fee Related CN2166315Y (en) | 1992-06-23 | 1992-06-23 | Revolving grates boiler tank structure for coal projection machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2166315Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175036A (en) * | 2011-03-15 | 2011-09-07 | 绍兴文理学院 | Combustion-promotion pollution-reduction energy-saving system of coal thrower reversal chain furnace |
-
1992
- 1992-06-23 CN CN 92217192 patent/CN2166315Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175036A (en) * | 2011-03-15 | 2011-09-07 | 绍兴文理学院 | Combustion-promotion pollution-reduction energy-saving system of coal thrower reversal chain furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |