CN205137432U - Buggy industrial boiler - Google Patents
Buggy industrial boiler Download PDFInfo
- Publication number
- CN205137432U CN205137432U CN201520909008.XU CN201520909008U CN205137432U CN 205137432 U CN205137432 U CN 205137432U CN 201520909008 U CN201520909008 U CN 201520909008U CN 205137432 U CN205137432 U CN 205137432U
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- China
- Prior art keywords
- boiler
- coal powder
- industrial coal
- boiler body
- burner hearth
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Abstract
The utility model discloses a buggy industrial boiler, including boiler body (10), flue shaft (12) that are formed with furnace (11) in boiler body (10) and are linked together with this furnace (11), its characterized in that, boiler body (10) last an organic whole is formed with and is located SNCR deNOx systems (20) in furnace (11), and be located SCR deNOx systems (21) in flue shaft (12). Like this, through setting up shallow degree (or degree of depth) SNCR+SCR deNOx systems in furnace inside and the reasonable temperature window of flue shaft, adopting integral type structural design, need not to add the equipment of placing SCR deNOx systems in addition outside boiler body, leading structural design has practiced thrift the follow -up upgrading expense of product to area has been saved to great limit.
Description
Technical field
The utility model relates to energy environment protection technical field, particularly, relates to a kind of industrial coal powder boiler.
Background technology
In recent years, haze weather, acid rain, dust pollution event take place frequently, and have had a strong impact on the productive life of people.Coal is the industrial important energy source of China, and proportion in primary energy consumption total amount, up to 70.23%.But it exploitation and utilize in process and but create serious pollution problem.How to utilize resource efficiently and decreasing pollution to greatest extent, become the urgent task of pendulum in face of us.The environmental problem that pollution that caused by coal burning causes has become the restraining factors of China's sustainable economic development.
China's coal-burned industrial boiler is the main source that haze produces.Coal combustion technology falls behind, and efficiency of fire coal is lowly the serious one of the main reasons of coal combustion pollution.Due to the particularity of China's energy resource structure, the Industrial Boiler of China, based on fire coal, about uses 1/3rd of national raw coal output every year.Therefore, one of the primary pollution source of Industrial Boiler Ye Shi China air pollution due to coal combustion.
Current industrial boilers in China Problems existing
1, the thermal efficiency of coal-burning boiler is not high
China is with 85% being nearly coal-burning boiler in Industrial Boiler, China's coal-burned industrial boiler is based on grate firing burning, and based on chain grate boiler, the design efficiency of boiler generally between 72% ~ 80%, but during actual motion ubiquity operating load comparatively boiler rated load is low, boiler slag carbon content is high, excess air coefficient is large, high fume temperature, therefore, the thermal efficiency is generally low than design efficiency.The evenly heat efficiency of 4t/h and following fire tube boiler is between 60% ~ 65%; The evenly heat efficiency of 6t/h ~ 35t/h boiler is 70% ~ 74%.The thermal efficiency of the grate firing coal-burning boiler of external advanced country can reach 80% ~ 85%, and some boiler has put into operation two, 30 years, still can keep the very high thermal efficiency.
2, the pollutant emission of coal-burning boiler is higher
Due to China's fuel structure, coal-burned industrial boiler is made to become one of primary pollution source of China's air coal smoke shape pollution.The annual smoke discharge amount of Industrial Boiler about 600 ~ 8,000,000 tons, accounts for 33% of national flue dust total release; The discharge capacity of SO2 is about 500 ~ 600 tons, accounts for 21% of national total release; The discharge capacity of CO2 is about 600,000,000 tons, and a large amount of NOX.
Utility model content
The purpose of this utility model is to provide a kind of industrial coal powder boiler, and this industrial coal powder boiler can save space, investment reduction cost.
To achieve these goals, the utility model provides a kind of industrial coal powder boiler, comprise boiler body, the flue vertical shaft being formed with burner hearth in described boiler body and being connected with this burner hearth, wherein, described boiler body is formed with the SNCR denitration system being positioned at described burner hearth, and is positioned at the SCR denitration system of described flue vertical shaft.
Preferably, described boiler body is vertical.
Preferably, described industrial coal powder boiler also comprises the burner being arranged in described burner hearth bottom.
Preferably, described burner is Bi-register swirl burner.
Preferably, the inwall of described burner hearth is provided with fin panel casing.
Preferably, be provided with the two drum of Natural Circulation in described burner hearth, the two drum of this Natural Circulation comprises upper drum and lower drum, is also communicated with convection bank between described upper drum and lower drum.
Preferably, described convection bank is membrane wall convection bank.
Preferably, the economizer be positioned at below described SCR denitration system and the air preheater be positioned at below this economizer is provided with in described flue vertical shaft.
Preferably, described boiler body is provided with acoustic wave ash ejector.
Preferably, described Industrial Boiler is provided with PLC or DCS control system.
Preferably, described boiler body is provided with explosion-protection equipment.
Pass through technique scheme, in burner hearth inside, either shallow (or degree of depth) SNCR+SCR denitrating system is set with flue vertical shaft rational temperature window, employing integral structure designs, outside boiler body, the equipment placing SCR denitration system is set up without the need to other, advanced structural design has saved product subsequent upgrade expense, and saves floor space to large extent.
Other feature and advantage of the present utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of the industrial coal powder boiler that the utility model preferred embodiment provides.
Description of reference numerals
10 boiler body 11 burner hearth 12 flue vertical shafts
13 fin panel casing 14 convection bank 15 air preheaters
16 acoustic wave ash ejector 17 furnace hopper 18 explosion-protection equipments
19 heavy boiler setting 20SNCR denitrating systems
21SCR denitrating system 22 flame monitoring apparatus 23 tertiary air device
30 burners
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
In the utility model, when not doing contrary explanation, the noun of locality of use is as " upper and lower, left and right " normally page with reference to the accompanying drawings, and " inside and outside " refers to the interior and outer of corresponding component profile.
As shown in Figure 1, the utility model provides a kind of industrial coal powder boiler, this industrial coal powder boiler comprises boiler body 10, the flue vertical shaft 12 being formed with burner hearth 11 in boiler body 10 and being connected with this burner hearth 11, wherein, boiler body 10 is formed with the SNCR denitration system 20 being positioned at burner hearth 11, and is positioned at the SCR denitration system 21 of flue vertical shaft 12.
It should be noted that, SNCR denitration system 20 refers to the system including SNCR SNCR Benitration reactor, and SCR denitration system 21 refers to the system including SNCR denitration reactor.Wherein, SNCR denitration reactor is arranged in the entry position near burner hearth 11, and SCR denitration reactor is arranged in flue vertical shaft 12, that is, near the exit position of burner hearth 11.
SNCR is under the effect of catalyst-free, utilizes reducing agent, at uniform temperature 850-1100 DEG C, the NOX in flue gas is reduced to harmless nitrogen and water; SCR is under the effect of catalyst, utilizes reducing agent selectively NOX to be reduced into nitrogen at uniform temperature 290-400 DEG C.
As can be seen from the above, the reaction temperature needed for SNCR is higher than the reaction temperature needed for SCR.Based on this, the utility model arranges SNCR denitration reactor and SCR denitration reactor respectively by choosing rational temperature window in burner hearth 11 and flue vertical shaft 12, under ensure that two kinds of Benitration reactors are all in optimal reaction temperature, thus denitration reaction carries out more thorough, reduce the discharge of nitrogen oxide to greatest extent.In addition, by being integrally formed SNCR denitration system 20 and SCR denitration system 21 on boiler body 10 respectively, outside boiler body 10, the equipment placing SCR denitration system is set up without the need to other, advanced structural design has saved product subsequent upgrade expense, and saves floor space to large extent.
Preferably, boiler body 10 is in vertical.Like this, industrial coal powder boiler more compact structure is reasonable, effectively can reduce the height of boiler body 10 and boiler room, reduces construction investment, improves the conveniency of steam generator system Operation and Maintenance.
Industrial coal powder boiler also comprises burner 30, and burner 30 can be arranged in the top of boiler body 10, and for ease of Operation and Maintenance and maintenance, save place, meet the field of flow characteristic of flue gas, burner 30 is arranged in the bottom of burner hearth 11.Like this, through whole burner hearth 11 during coal dust firing, burn the time the longest, burner 30 can be installed on the ground, and maintenance also facilitates; First air pipeline with powder is short, and elbow is few, and coal dust hoisting depth also shortens dramatically, and thus primary air fan power consumption is minimum; Air-introduced machine power consumption also because of burner 30 end put cause burner hearth 11 forward high temperature wind turning greatly strengthen and obviously reduce.
For adapting to comparatively broad Pulverized Coal, and realize stable, efficient, low nitrogen, clean burning, burner 30 is Bi-register swirl burner.Like this, by adopting wind powder turbulent flow atomization structure and multistage air distribution device, rational little excess air factor can be adopted, decrease boiler discharging flue gas amount, effectively improve the thermal efficiency of boiler.In addition, the scene of a fire can improveing burner hearth 11 is arranged, effectively improves the burn-off rate of boiler, the three class bituminous coal that original pulverized-coal fired boiler must use is relaxed to two class bituminous coal, greatly improves the adaptability of fuel.
For absorbing a large amount of radiant heat of high-temperature flue gas, minimizing slag and high-temperature flue gas are to the damage of furnace wall simultaneously, and protection furnace wall, the inwall of burner hearth 11 is provided with fin panel casing 13.
For ease of realizing the heat accepting flue gas transmission fully, be provided with the two drum of Natural Circulation in burner hearth 11, the two drum of this Natural Circulation comprises upper drum and lower drum, is also communicated with convection bank 14 between upper drum and lower drum.Such as, convection bank 14 can be staggered in arrangement, upper lower drum lateral arrangement, the combustion space of large burner hearth, ensure sufficient burning time, be beneficial to complete combustion of fuel and burn.Convection bank 14 is all arranged in flue, and the heat exchange by washing away of flue gas, also claims convection heating surface, is another kind of main heating surface.By the direction of flue gas stream, the tube bank of the first process of flue gas is heated comparatively strong, and in pipe, water upwards flows, and becomes tedge; After flue gas through tube bank, be heated more weak, pipe in water flow downward, become down-comer, and then form water circulation between upper drum and lower drum.
It should be noted that, the two drum of Natural Circulation is relative to utilizing the pressure of water pump to for the mandatory flowing completing boiler water flowing, particularly, referring under the effect of flowing pressure, water from down-comer to water screen tube, as two drums that fin panel casing 13 tedge constantly circulates.
For realizing heat convection better, convection bank 14 is membrane wall convection bank.
For fully absorbing the heat of flue gas, heat convection, effectively reduce exhaust gas temperature, improve the thermal efficiency, save fuel, the economizer be positioned at below SCR denitration system 21 is provided with in flue vertical shaft 12, such as, efficient screwed pipe steel tube economizer, simultaneously, the thermal stress of the drum wall caused because of the temperature difference can also be reduced, be conducive to the service life extending drum.
Further, for effectively reducing exhaust gas temperature, reducing flue gas loss, in flue vertical shaft 12, being provided with the air preheater 15 be positioned at below this economizer, such as, efficient threaded flue air preheater.Like this, the required air of heat heating fuel burning of boiler tail flue gas can be utilized, improve air themperature, catching fire and combustion process of fuel can be improved, thus reduce every unburnt loss, improve boiler thermal output.
When knot ash on boiler water wall, radiation of burner hearth not only can be made to absorb heat reduce, affect boiler capacity, but also cause furnace outlet gas temperature to raise, for convection heating surface, not only increase heat transfer resistance, flowing resistance, reduce boiler thermal output, and the safety of back-end surfaces work can be affected.
Based on this, in order to ensure each heating surface of boiler can for a long time, efficient, safety, reliably to run, boiler body 10 is provided with acoustic wave ash ejector 16, to remove the dust stratification of burner hearth and convection part.
For ensureing the safety of steam generator system, boiler body 10 is provided with explosion-protection equipment 18.
For the benefit of lime-ash successfully discharge with drain, slagging prevention and slagging scorification, the lower end of boiler body 10 is provided with furnace hopper 17.
The hydrocarbon generated for realizing activation primary zone makes it further Thorough combustion, ensures more than burn-off rate >=99.6% of fuel, realizes energy-conservation target, boiler body 10 is provided with tertiary air device 23.
For ease of observing the combustion case of burner 30 intuitively, in the burner hearth 11 of boiler body 10, be provided with flame monitoring apparatus 22.
For ease of stoping heat outwards to scatter and disappear, play a part insulation and sealing, and make flue gas by the direction flowing of specifying, boiler body 10 adopts heavy boiler setting 19.
In addition, the devices such as manhole, hand hole, flame-observing hole, inspection opening, explosion proof door can be reasonably set in boiler body 10 each relevant position.
For realizing collection, the transmission of operational factor and data and controlling, Industrial Boiler is provided with PLC or DCS control system.Like this; automatic control system is advanced, operationalization degree is high; complete water level, flow, temperature and pressure detecting; perfect early warning protector; simple and clear operation interface, realizes Automatic Control and the protection of the aspects such as feedwater, pressure, burning completely, has automatic display, optimum configurations; automatic control function is perfect, complete, reliable, and operating system is directly perceived, simple and direct.
In addition, line monitor system for primary wind and powder can also be adopted, on-line checkingi powder concentration, blast, air quantity, data acquisition and contrast computing are carried out to parameters such as boiler operatiopn load variations, flue gas oxygen content, combustion chamber drafts, adjustment air door actuating mechanism, automatically adjusts wind coal proportion, realizes combustion system and automatically run the automatic adjustment with load.
Below preferred embodiment of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (11)
1. an industrial coal powder boiler, comprise boiler body (10), the flue vertical shaft (12) being formed with burner hearth (11) in described boiler body (10) and being connected with this burner hearth (11), it is characterized in that, described boiler body (10) is formed with the SNCR denitration system (20) being positioned at described burner hearth (11), and is positioned at the SCR denitration system (21) of described flue vertical shaft (12).
2. industrial coal powder boiler according to claim 1, is characterized in that, described boiler body (10) is in vertical.
3. industrial coal powder boiler according to claim 1, is characterized in that, described industrial coal powder boiler also comprises the burner (30) being arranged in described burner hearth (11) bottom.
4. industrial coal powder boiler according to claim 3, is characterized in that, described burner (30) is Bi-register swirl burner.
5. industrial coal powder boiler according to claim 1, is characterized in that, the inwall of described burner hearth (11) is provided with fin panel casing (13).
6. industrial coal powder boiler according to claim 1, it is characterized in that, be provided with the two drum of Natural Circulation in described burner hearth (11), the two drum of this Natural Circulation comprises upper drum and lower drum, is also communicated with convection bank (14) between described upper drum and lower drum.
7. industrial coal powder boiler according to claim 6, is characterized in that, described convection bank (14) is membrane wall convection bank.
8. industrial coal powder boiler according to claim 1, it is characterized in that, in described flue vertical shaft (12), be provided with the economizer being positioned at described SCR denitration system (21) below and the air preheater (15) be positioned at below this economizer.
9. industrial coal powder boiler according to claim 1, is characterized in that, described boiler body (10) is provided with acoustic wave ash ejector (16).
10. industrial coal powder boiler according to claim 1, is characterized in that, described Industrial Boiler is provided with PLC or DCS control system.
11. industrial coal powder boilers according to claim 1, is characterized in that, described boiler body (10) are provided with explosion-protection equipment (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520909008.XU CN205137432U (en) | 2015-11-13 | 2015-11-13 | Buggy industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520909008.XU CN205137432U (en) | 2015-11-13 | 2015-11-13 | Buggy industrial boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205137432U true CN205137432U (en) | 2016-04-06 |
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ID=55623222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520909008.XU Expired - Fee Related CN205137432U (en) | 2015-11-13 | 2015-11-13 | Buggy industrial boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205137432U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539545A (en) * | 2018-11-23 | 2019-03-29 | 兖矿集团有限公司 | A kind of atmospheric coal-fired boiler and its processing method of in-furnace desulfurization, denitration dedusting |
| CN110360546A (en) * | 2019-07-04 | 2019-10-22 | 北控清洁热力有限公司 | Vertical pulverized-coal fired boiler |
-
2015
- 2015-11-13 CN CN201520909008.XU patent/CN205137432U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539545A (en) * | 2018-11-23 | 2019-03-29 | 兖矿集团有限公司 | A kind of atmospheric coal-fired boiler and its processing method of in-furnace desulfurization, denitration dedusting |
| CN109539545B (en) * | 2018-11-23 | 2021-05-14 | 兖矿集团有限公司 | Normal-pressure coal-fired boiler for desulfurization, denitrification and dust removal in boiler and treatment method thereof |
| CN110360546A (en) * | 2019-07-04 | 2019-10-22 | 北控清洁热力有限公司 | Vertical pulverized-coal fired boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20211113 |