CN109114540B - High-efficiency low-nitrogen-emission chain grate boiler - Google Patents
High-efficiency low-nitrogen-emission chain grate boiler Download PDFInfo
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- CN109114540B CN109114540B CN201810949598.7A CN201810949598A CN109114540B CN 109114540 B CN109114540 B CN 109114540B CN 201810949598 A CN201810949598 A CN 201810949598A CN 109114540 B CN109114540 B CN 109114540B
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 104
- 239000003245 coal Substances 0.000 claims abstract description 48
- 239000002893 slag Substances 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001868 water Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B30/00—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber
- F23B30/02—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts
- F23B30/06—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone
- F23B30/08—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
- F23L1/02—Passages or apertures for delivering primary air for combustion by discharging the air below the fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/06—Crowns or roofs for combustion chambers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
The invention provides a high-efficiency low-nitrogen-emission chain grate boiler which comprises a boiler cavity, an upper boiler barrel, a first combustion zone, a second combustion zone and a coal burning zone, wherein the bottom of the boiler cavity is the coal burning zone, a coal inlet is arranged at the initial end of a grate track, a slag drop port is arranged at the tail end of the grate track, a plurality of primary air inlets are arranged below the grate track, the second combustion zone is arranged above the grate track, the first combustion zone is arranged above the second combustion zone, the upper boiler barrel is arranged above the first combustion zone, and a rear arch is arranged at the communication part of the second combustion zone and the first combustion zone. The high-efficiency low-nitrogen-emission chain grate boiler has the thermal efficiency reaching 90 percent and the NOx emission lower than 100mg/Nm 3 The energy cost is reduced, the combustion efficiency is improved, the pollution emission is reduced, and the equipment and operation cost is reduced.
Description
Technical Field
The invention belongs to the field of boiler manufacturing, and particularly relates to a high-efficiency low-nitrogen-emission chain grate boiler.
Background
The energy structure of the country is a country with rich coal, less gas and oil deficiency, which determines the energy consumption pattern of the country with coal as the main material and determines the boiler industry structure of the country with coal-fired boiler as the main material. The annual coal consumption of the boiler in the coal-fired industry in China is about 7 hundred million tons, the annual coal consumption accounts for about 20 percent of the national consumption, the overall energy efficiency is about 65 percent, and the annual energy consumption is 15 to 20 percent lower than the international advanced level, and the annual coal consumption contributes about 1/3 of the national soot and 1/4 of SO 2 And 1/10 of NOx, the total energy consumption and pollution emission of industrial and domestic boilers every year are the second to be located in the national industrial industry, so that the energy conservation, consumption reduction and pollution emission reduction of the industrial boilers are very serious, one of the important directions is to develop central heating, and the industrial, commercial and domestic boilers with large capacity and high parameters are coal burning. Under the situation, the development of the high-capacity high-parameter coal-fired boiler needs to solve a plurality of problems of the coal-fired boiler in terms of realizing clean and high-efficiency combustion, namely about eight layers of combustion boilers in the coal-fired industrial boiler, wherein the chain boilers occupy more than six total layers, the problems are more prominent, and the problems are solved most effectivelyMeaning: the layer combustion boiler has the advantages of simple structure, strong fuel applicability, good load change applicability, relatively simple operation and running, high cost and wide formation range, but has extremely low overall average efficiency and more pollutant discharge, and the reasons are mainly as follows: (1) The coal is uniformly burnt and simply crushed, the coal types are changeable, the coal quality is poor, and the difference between the coal burning conditions of the foreign developed countries is large; (2) The operation level of the control system and operators is poor, and the pollutant treatment matched equipment is behind, which is the advantage of the layer combustion boiler in cost, but is an important reason for causing the problems of efficiency and pollutant emission; (3) Thousands of industrial boiler factories exist in China, and compared with power station boiler factories, the single factory has a much smaller scale and uneven processing level; (4) The foreign coal-fired layer-combustion boilers are fewer and cannot take the advanced experience; (5) The existing single energy-saving technologies are mostly based on experience accumulation, lack of theoretical promotion and do not form a complete design method. In recent years, the domestic coal-fired grate-fired boiler industry is also developed to a certain extent, a characteristic combustion technology suitable for coal consumption conditions in China is formed, and technologies such as smoke discharging temperature reduction, excessive air coefficient reduction, membrane wall, threaded pipe, layered coal feeding, fly ash backfire technology and the like are used by introducing technologies (such as GEF (high efficiency Industrial boiler) project) or an independent research and development mode, so that the heat efficiency of a large and medium chain boiler is improved under the condition of raw coal combustion, but the combustion pollutant control technology is still relatively behind, and the industry level is not changed as a whole. The boiler has serious flame running phenomenon, unburned carbon, efficiency of 75-78 percent and NOx emission of 400-500mg/Nm 3 And also SO 2 And the release of a number of undesirable gases.
Disclosure of Invention
The invention aims to solve the technical problems by providing a high-efficiency low-nitrogen-emission chain grate boiler, overcoming the defects, and solving the problems by changing the setting position of an exhaust outlet and changing the arch setting area and shape of the boiler.
In order to solve the technical problems, the invention provides a high-efficiency low-nitrogen-emission chain grate boiler, which comprises a boiler chamber, an upper boiler barrel, a first combustion zone, a second combustion zone and a coal burning zone, wherein the upper boiler barrel, the first combustion zone, the second combustion zone and the coal burning zone are arranged in the boiler chamber, the bottom of the boiler chamber is the coal burning zone, the coal burning zone comprises a coal inlet, a grate track, a primary air inlet and a slag outlet, the coal inlet is arranged at the beginning end of the grate track, the slag outlet is arranged at the tail end of the grate track, the grate track rotates from the coal inlet end to the slag outlet end, a plurality of primary air inlets are arranged below the grate track, the primary air inlets send air to the grate track, the second combustion zone is arranged above the grate track, the first combustion zone is arranged above the second combustion zone, the upper boiler barrel is arranged above the first combustion zone, the boiler chamber is provided with a front side wall and a rear side wall, the front side wall is close to the boiler arch, the front side wall is connected with the rear side wall, and the front side wall is connected with the rear side wall in a fixed way.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, a furnace front arch is further arranged in the boiler chamber, the furnace front arch is arranged in the first combustion area and fixedly connected with the front side wall of the boiler chamber, and the furnace front arch protrudes from the direction of the front side wall to the direction of the rear side wall.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the protruding length of the furnace front arch is larger than that of the rear arch, and the protruding length of the furnace front arch plus that of the rear arch is smaller than the inner diameter of the first combustion zone.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the front end of the rear arch in the boiler chamber is also provided with a reverse inclination structure, the reverse inclination structure is connected with the front end of the rear arch, the reverse inclination structure protrudes from the rear arch direction to the front side wall direction, and the reverse inclination structure inclines from the first combustion area direction to the second combustion area direction.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the protruding length of the rear arch and the protruding length of the reverse inclination structure are larger than the radius of the first combustion zone.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the high-efficiency low-nitrogen-emission chain grate boiler further comprises a lower boiler barrel and a third combustion zone, wherein the lower boiler barrel is positioned below the upper boiler barrel, the third combustion zone is arranged between the lower boiler barrel and the upper boiler barrel, and the third combustion zone is communicated with the first combustion zone.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the upper boiler barrel and the lower boiler barrel are arranged in parallel.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the plurality of primary air inlets are uniformly distributed below the grate track.
As an optimized scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the high-efficiency low-nitrogen-emission chain grate boiler further comprises a secondary air inlet, and the secondary air inlet is arranged on the rear side wall of the first combustion zone.
As a preferable scheme of the high-efficiency low-nitrogen-emission chain grate boiler, the number of the secondary air inlets is one, and the number of the primary air inlets is 8.
Compared with the prior art, the high-efficiency low-nitrogen-emission chain grate boiler provided by the invention solves the problems of low efficiency and high pollutant emission concentration of the existing coal-fired chain, the thermal efficiency reaches 90%, and the NOx emission is lower than 100mg/Nm 3 The continuous application and development of the coal-fired chain boiler are ensured, the method has important significance for meeting the requirements of environmental management and energy supply in China, reducing energy cost of energy consumption units and improving the competitive power of products from manufacturing enterprises in China, and compared with the same type of gas, electricity or coal powder industrial boilers, the method realizes similar level of combustion efficiency and pollution emission control, reduces equipment and operation cost, and can meet the requirement of boiler emission in most areas in China for a long timeSolving the problems, has extremely high popularization value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein,
FIG. 1 is a schematic diagram of a high efficiency low nitrogen emission traveling grate boiler according to the present invention;
fig. 2 is a schematic view showing the sectional structure along the line A-A and B-B in fig. 1.
Wherein: 1 is a boiler chamber, 2 is an upper boiler barrel, 3 is a first combustion area, 4 is a second combustion area, 5 is a coal burning area, 51 is a coal inlet, 52 is a grate track, 53 is a primary air inlet, 54 is a slag drop port, 6 is a rear arch, 61 is a reverse inclination structure, 7 is a furnace front arch, 8 is a lower boiler barrel, 9 is a third combustion area, 10 is a secondary air inlet, 11 is a front side wall, and 12 is a rear side wall.
Detailed Description
The invention relates to a high-efficiency low-nitrogen-emission chain grate boiler, which comprises: the boiler comprises a boiler chamber 1, an upper boiler barrel 2, a first combustion zone 3, a second combustion zone 4 and a coal burning zone 5.
In order that the above-recited objects, features and advantages of the present invention will become more apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof.
First, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In the following, the present invention will be described in detail by using schematic structural diagrams, etc., and in the description of the embodiments of the present invention, for convenience of explanation, schematic diagrams showing a structure of a chain grate boiler with high efficiency and low nitrogen emission will not be partially enlarged according to a general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, the three-dimensional space of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a high-efficiency low-nitrogen-emission traveling grate boiler according to the present invention; fig. 2 is a schematic view showing the sectional structure along the line A-A and B-B in fig. 1. As shown in fig. 1 and 2, the high-efficiency low-nitrogen-emission chain grate boiler comprises a boiler cavity 1 and an upper boiler barrel 2 to be heated, wherein the boiler cavity 1 is surrounded by a sealed space by a cavity wall of the upper boiler barrel 2, the sealed space is divided into a first combustion zone 3, a second combustion zone 4 and a coal combustion zone 5, the bottom of the boiler cavity 1 is the coal combustion zone 5, the coal combustion zone 5 comprises a coal inlet 51, a grate track 52, a primary air inlet 53 and a slag outlet 54, the coal inlet 51 is arranged at the beginning end of the grate track 52, the slag outlet 54 is arranged at the tail end of the grate track 52, the grate track 52 rotates from the end of the coal inlet 51 to the slag outlet 54, coal is added to the grate track 52 from the coal inlet 51, the slag outlet 54 is conveyed by the grate track 52, the coal is fully combusted in the conveying process of the grate track 52, a plurality of primary air inlets 53 are used for conveying air to the grate track 52, the necessary oxygen is provided for the combustion of the coal, the plurality of primary air inlets 53 are uniformly distributed below the grate track 52, the air inlets 53 are stably conveyed below the grate track 52, the air inlet 53 is stable, the air inlet is conveyed to the air inlet and the combustion efficiency is lower than the combustion efficiency of the conventional combustion air inlet is lower than 200-80 mg/80 mg, and the combustion efficiency is lower than the air inlet efficiency is lower than the combustion efficiency of the conventional combustion air inlet and is lower than the air inlet and up to be equal to and up to and the air is lower than the air and the air 3 The upper part of the fire grate track 52 is provided with a second combustion zone 4, the communication part of the second combustion zone 4 and the first combustion zone 3 is provided with a back arch 6, for the convenience of understanding, the cavity wall of the boiler cavity 1 is divided into a front side wall 11 and a back side wall 12 according to the front and back positions, the front side wall 11 is close to the coal inlet 51, the back side wall 12 is close to the slag drop port 54, the back arch 6 is fixedly connected with the back side wall 12 of the boiler cavity 1, the back arch 6 protrudes from the direction of the back side wall 12 to the direction of the front side wall 11, the front end of the back arch 6 is also provided with a reverse inclination structure 61, the reverse inclination structure 61 is connected with the front end of the back arch 6, the reverse inclination structure 61 protrudes from the direction of the back arch 6 to the direction of the front side wall 11, the back arch 6 extends to the front part,and reversely inclined to cover the rear arch region, whereby the second combustion region 4 becomes a covered region covered by the rear arch 6 and the reversely inclined structure 61. The structure can burn out combustible materials by increasing the coverage area of the arch area and increasing the temperature of the area, reduce the primary air quantity and reversely incline the arch so as to form a reducing atmosphere in the second combustion area 4, and oxygen deficiency is beneficial to reducing NOx into nitrogen which is an important component of the atmosphere, so that no pollution is caused to air, in addition, nitric oxide and ammonia react to form water and nitrogen, and carbon particles and high-temperature flue gas are guided to the furnace front arch 7.
The upper part of the second combustion zone 4 is a first combustion zone 3, a furnace front arch 7 is arranged in the first combustion zone 3, the furnace front arch 7 is fixedly connected with the front side wall 11 of the boiler cavity 1, the furnace front arch 7 protrudes from the direction of the front side wall 11 to the direction of the rear side wall 12 to form the furnace front arch 7 and a secondary air inlet 10 arranged on the rear side wall 12 of the first combustion zone 3, so that the flue gas flow is prolonged, secondary air generates deflection, oxygen required by combustion is supplemented, combustible materials generated by coal in combustion are burnt out, the secondary air is high in speed, and the arch zone is added to form vortex, so that the combustion time is longer, the upper part of the first combustion zone 3 is an upper boiler barrel 2, and water in the upper boiler barrel 2 is heated by utilizing heat in the first combustion zone 3 and the second combustion zone 4. The secondary air inlet 10 feeds in the combustible material which is not completely combusted by the oxygen to be combusted more thoroughly, so that the NOx emission concentration is lower than 100mg/Nm 3 ，
In the embodiment shown in fig. 1, the protruding length of the front arch 7 is greater than the protruding length of the rear arch 6, and the protruding length of the front arch 7 plus the protruding length of the rear arch 6 is smaller than the inner diameter of the first combustion zone 3. The protruding length of the rear arch 6 plus the protruding length of the anti-tilt structure 61 is greater than the radius of the first combustion zone 3. In order to make more full use of the heat of the second combustion zone 4 and the first combustion zone 3, a long and narrow third combustion zone 9 is arranged behind the first combustion zone 3, the lower boiler barrel 8 is positioned below the upper boiler barrel 2, the third combustion zone 9 is arranged between the lower boiler barrel 8 and the upper boiler barrel 2, the third combustion zone 9 is communicated with the first combustion zone 3, and the heat of the first combustion zone 3 is transmitted to the third combustion zone 9 so as to heat the water in the lower boiler barrel 8 and the upper boiler barrel 2. In a preferred embodiment, the upper drum 2 is arranged in parallel with the lower drum 8, which allows for a uniform heating and facilitates the arrangement of the components inside the boiler chamber 1.
In the embodiment of fig. 1, the number of secondary air inlets 10 is one, and the number of primary air inlets 53 is 8. The wind speed of the secondary air inlet 10 is larger, and the wind speed of the primary air inlet 53 is smaller than that of the air inlet of a general boiler.
The structure combines coal quality control according to the characteristics of zone combustion of the layer combustion boiler hearth layer, and utilizes a carbon layer and NH 3 And the reducing environment suppresses the beneficial factors of NOx generation, develops a low NOx combustion technology of arch wind combination, realizes low NOx generation in the furnace, reduces various combustion losses of the boiler by combining the technologies of wind distribution regulation, waste heat utilization and the like, and realizes high-efficiency combustion. By adopting the boiler, the thermal efficiency of the boiler can reach 90 percent, and the NOx emission is lower than 100mg/Nm 3 Is not limited to the technical level of (a).
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (7)
1. A high-efficient low nitrogen discharges the boiler of the chain grate, characterized by: comprises a boiler chamber, an upper boiler barrel, a first combustion zone, a second combustion zone and a coal burning zone, wherein the upper boiler barrel, the first combustion zone, the second combustion zone and the coal burning zone are arranged in the boiler chamber, the bottom of the boiler chamber is the coal burning zone, the coal burning zone comprises a coal inlet, a fire grate track, a primary air inlet and a slag outlet, the coal inlet is arranged at the beginning end of the fire grate track, the slag outlet is arranged at the tail end of the fire grate track, the fire grate track rotates from the coal inlet end to the slag outlet end, a plurality of primary air inlets are arranged below the fire grate track, the primary air inlets send air to the fire grate track, the second combustion zone is arranged above the fire grate track, the first combustion zone is arranged above the second combustion zone, the upper boiler barrel is arranged above the first combustion zone, the boiler chamber is provided with a front side wall and a rear side wall, the front side wall is close to the coal inlet, the rear side wall is close to the slag drop, a rear arch is arranged at the communication part between the second combustion area and the first combustion area, the rear arch is fixedly connected with the rear side wall of the boiler cavity, the rear arch protrudes from the direction of the rear side wall to the direction of the front side wall, the front end of the rear arch in the boiler cavity is also provided with an anti-tilting structure, the anti-tilting structure is connected with the front end of the rear arch, the anti-tilting structure protrudes from the direction of the rear arch to the direction of the front side wall, the anti-tilting structure inclines from the direction of the first combustion area to the direction of the second combustion area, the protruding length of the rear arch is greater than the radius of the first combustion area, the boiler cavity is also provided with a furnace front arch, the furnace front arch is arranged in the first combustion area, the furnace front arch is fixedly connected with the front side wall of the boiler cavity, the furnace front arch protrudes from the front side wall direction toward the rear side wall direction.
2. The high efficiency low nitrogen emission traveling grate boiler of claim 1, wherein: the protruding length of the furnace front arch is larger than that of the rear arch, and the protruding length of the furnace front arch plus that of the rear arch is smaller than the inner diameter of the first combustion zone.
3. The high efficiency low nitrogen emission traveling grate boiler of claim 1, wherein: the high-efficiency low-nitrogen-emission chain grate boiler further comprises a lower boiler barrel and a third combustion zone, wherein the lower boiler barrel is positioned below the upper boiler barrel, the third combustion zone is arranged between the lower boiler barrel and the upper boiler barrel, and the third combustion zone is communicated with the first combustion zone.
4. A high efficiency low nitrogen emission traveling grate boiler as claimed in claim 3 wherein: the upper boiler barrel and the lower boiler barrel are arranged in parallel.
5. The high efficiency low nitrogen emission traveling grate boiler of claim 1, wherein: the plurality of primary air inlets are uniformly distributed below the fire grate track.
6. The high efficiency low nitrogen emission traveling grate boiler of claim 1, wherein: the high-efficiency low-nitrogen-emission chain grate boiler further comprises a secondary air inlet, and the secondary air inlet is arranged on the rear side wall of the first combustion zone.
7. The high efficiency low nitrogen emission traveling grate boiler of claim 6, wherein: the number of the secondary air inlets is one, and the number of the primary air inlets is 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949598.7A CN109114540B (en) | 2018-08-20 | 2018-08-20 | High-efficiency low-nitrogen-emission chain grate boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949598.7A CN109114540B (en) | 2018-08-20 | 2018-08-20 | High-efficiency low-nitrogen-emission chain grate boiler |
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| Publication Number | Publication Date |
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| CN109114540A CN109114540A (en) | 2019-01-01 |
| CN109114540B true CN109114540B (en) | 2024-01-26 |
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2018
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| CN109114540A (en) | 2019-01-01 |
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