CN205579960U - Buggy boiler - Google Patents

Buggy boiler Download PDF

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Publication number
CN205579960U
CN205579960U CN201521091788.8U CN201521091788U CN205579960U CN 205579960 U CN205579960 U CN 205579960U CN 201521091788 U CN201521091788 U CN 201521091788U CN 205579960 U CN205579960 U CN 205579960U
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CN
China
Prior art keywords
boiler
air preheater
temperature air
coal dust
low temperature
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.)
Expired - Fee Related
Application number
CN201521091788.8U
Other languages
Chinese (zh)
Inventor
唐海清
沈玉华
徐慧
汪志刚
王改
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou environmental protection Polytron Technologies Inc
Original Assignee
HANGZHOU JUNENG BOILER CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HANGZHOU JUNENG BOILER CO Ltd filed Critical HANGZHOU JUNENG BOILER CO Ltd
Priority to CN201521091788.8U priority Critical patent/CN205579960U/en
Application granted granted Critical
Publication of CN205579960U publication Critical patent/CN205579960U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a buggy boiler, including boiler body be equipped with high temperature air preheater, dust remover and low temperature air preheater on boiler body's the afterbody flue, its characterized in that the low temperature air preheater set up to be in the rear portion of dust remover. The utility model discloses because the low temperature air preheater sets up the rear portion of dust remover, the flue -gas temperature of controlling access to the dust remover is higher than 100 DEG C, and the moisture in the flue gas can not produce the condensation, therefore does not influence dust removal effect. The low temperature air preheater will be followed the flue gas that the dust remover came out and further lowered the temperature minimum dropping to below 80 DEG C. Calculate according to theoretical, the every reduction of flue -gas temperature is 12 DEG C, and the thermal efficiency of boiler can improve 1%. Therefore, the utility model discloses can improve the whole thermal efficiency of boiler greatly.

Description

A kind of coal dust hot-water boiler
Technical field
This utility model relates to coal-burned industrial boiler field, is specifically related to a kind of with coal dust as fuel, is used for heating The pulverized-coal fired boiler of hot water.
Background technology
The energy resource structure of China is based on coal, within the following long duration, based on fire coal, oil, gas, Biomass, other solid fuels will be the leading products of Industrial Boiler as supplementary Industrial Boiler.
Traditional industry coal-boiler is based on grate firing boiler, and shortcoming is that efficiency of combustion is low, seriously polluted, it is difficult to Meet energy-saving and emission-reduction and pollutant emission requirement.
The powdery burning of coal is one of high performance clean burning mode of fuel, its efficiency of combustion up to more than 98%, It is a ripe combustion technology, is widely used at large-sized station boiler.In recent years, coal dust firing is in work Also it is applied on industry boiler.In order to improve the thermal efficiency of boiler, usual back-end ductwork arrange high temperature air preheater and Low temperature air preheater.Described high temperature air preheater and the cold side channel of low temperature air preheater are used for adding hot-air, and with two The mode of secondary wind is blown into burner hearth by burner, is burner hearth flue gas out, is entering with air in its hot-side channel Lower the temperature after row heat exchange, therefore efficiently utilize the waste heat of flue gas.One is connected in the rear end of low temperature air preheater Sack cleaner, removes the solid particle in flue gas, after then carrying out purified treatment by SO2 cleaning system Burner hearth is sprayed into after heating in returning the cold side channel of low temperature air preheater and high temperature air preheater.In theory, from low Temperature air preheater flue-gas temperature out is the lowest, then the thermal efficiency of boiler is the highest, but when flue-gas temperature is less than 100 DEG C Time, the moisture meeting condensation in flue gas, solid particle is attached on liquid particles, has had a strong impact on dust removing effects. Therefore generally designing the flue-gas temperature of sack cleaner import department in the region higher than 100 DEG C, its result is limit Make the raising space of boiler thermal output.
Meanwhile, existing coal dust hot-water boiler, mostly use the double drum bulk water pipe boiler structure of SHS type or The double drum water pipe structure of D type, it has the disadvantage that
1) the double drum bulk water pipe boiler excessive height of SHS type, manufactures and installs inconvenience, maintenance difficulty.
2) the double drum of D type assembles or boiler furnace in bulk is too low, and the too low fuel combustion of burner hearth is the most abundant.
3) burning is uniform not, and front and back Temperature Difference Ratio is relatively big, is unfavorable for reducing NOXContent.
4) load regulation range is little.
5) Boiler Ash, slag cleaning inconvenience.
6) boiler steel, furnace wall material consume big.
7) floor space construction cost big, native in boiler room is high.
8) boiler seal performance is the best, brick wall inleakage is big, boiler heat loss big, air-introduced machine power consumption is big.
Summary of the invention
The technical problem being the thermal efficiency that prior art exists and cannot improving further to be solved in the utility model, Aim to provide one and exhaust gas temperature can be greatly lowered, increase substantially the coal dust water bath of boiler efficiency Stove.
This utility model also provides a kind of generation height that can effectively stop burner hearth coking and reduce nitrogen oxides Coal dust hot-water boiler.
For solving the problems referred to above, this utility model by the following technical solutions: a kind of coal dust hot-water boiler, including Boiler body, is provided with high temperature air preheater, economizer, cleaner unit and low on the back-end ductwork of described boiler body Temperature air preheater, it is characterised in that described low temperature air preheater is arranged on the rear portion of described cleaner unit.
Coal dust hot-water boiler of the present utility model, owing to low temperature air preheater is arranged on the rear portion of described cleaner unit, enters The flue-gas temperature entering sack cleaner controls higher than 100 DEG C, and the moisture in flue gas will not produce condensation, thus not Affect dust removing effects.Low temperature air preheater will be lowered the temperature further from cleaner unit flue gas out, minimum is down to 80 DEG C Left and right.By Theoretical Calculation, flue-gas temperature often reduces by 12 DEG C, and the thermal efficiency of boiler can improve 1%.Therefore, originally Utility model can be greatly improved the overall thermal efficiency of boiler.
Boiler body of the present utility model can use any standard structure, in the feelings not changing existing boiler structure Under condition, just can reach the effect improving boiler thermal output only by the position replacing cleaner unit and low temperature air preheater Really, thus without extra improvement cost.
As improvement of the present utility model, between described high temperature air preheater and cleaner unit, it is additionally provided with economizer, can Improve the thermal efficiency of boiler further.
As further improvement of the utility model, described boiler body includes burner hearth, secondary furnace, convection tube Bundle, fin panel casing, burner, lower header and upper collecting chamber, described lower header and upper collecting chamber are separately positioned on The bottom of boiler body and top;Described burner is arranged on bottom or the front portion of described boiler furnace, described Boiler body use pipe-support type structure, corner arrange root down-comer;Described down-comer and fin panel casing upper Lower two ends respectively with described upper collecting chamber and lower header UNICOM;The top of described secondary furnace joins with burner hearth outlet flue Logical;Described convection bank is arranged in the vertical passage outside burner hearth;Described vertical passage top and bottom Respectively with bottom and the back-end ductwork UNICOM of secondary furnace;Described upper furnace is provided with explosion proof door, and middle part is provided with combustion-supporting Tertiary air, bottom is provided with slag device and mucking machine.Using corner tube type structure, down-comer is i.e. water circulation pipe, Simultaneously also support whole boiler, therefore need not separately set supporting steel frame, compact overall structure, profile arrange simple, Floor space is little, and steel consumption is low.Boiler uses membrane wall structure, and furnace wall has only to insulation material, integral sealing, Good heat insulating, Air Leakage Into Boilers is few, and air-introduced machine power consumption is few.Boiler diaphragm type wall structural strength is high simultaneously, and boiler is transported Row is reliable.
Further improving as of the present utility model, the middle part of described burner hearth is additionally provided with S-NCR denitration device. S-CR denitration device it is additionally provided with on the back-end ductwork of described boiler body.Use the mode of combined denitration, at pot In the case of stove is in high load capacity, selects S-CR denitration device to carry out denitration, be in the feelings of underload at boiler Under condition, S-NCR denitration device is selected to carry out denitration, in the case of boiler is in special high load capacity, simultaneously S-NCR denitration device and S-CR denitration device is used to carry out denitration, it is possible to decrease discharged nitrous oxides arrives Below 100mg/nm3.Therefore, combined denitration mode adapts to regulate load.Additionally, due to S-CR takes off Nitre equipment is arranged on back-end ductwork, the nearest, is therefore easy to maintenance.
Further improve as of the present utility model, described low temperature air preheater use in enamel pipe, can in case Only the stifled ash of low temperature, can avoid again cold end corrosion.
Further improving as of the present utility model, described convection bank is flag facial canal.
Accompanying drawing explanation
The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
With reference to Fig. 1, a kind of coal dust hot-water boiler of the present utility model, including boiler body, at described boiler originally It is sequentially provided with S-CR denitration device 13, high temperature air preheater 5, economizer 14 on the back-end ductwork 20 of body, removes Dirt device 17 and low temperature air preheater 18, described low temperature air preheater 18 is arranged on the rear portion of described cleaner unit 17.
Described boiler body includes that burner hearth 1, secondary furnace 3, flag are in the face of flowing bundle 4, fin panel casing 7, combustion Burner 8, lower header 9 and upper collecting chamber 15, described lower header 9 and upper collecting chamber 15 are separately positioned on boiler originally The bottom of body and top;Described burner 8 is arranged on bottom or the front portion of described boiler furnace 1, described Boiler body uses pipe-support type structure, and 4 down-comers 6 are arranged in corner;Described down-comer 6 and fin panel casing The two ends up and down of 7 respectively with described upper collecting chamber 15 and lower header 9 UNICOM;The top of described secondary furnace 3 with Burner hearth outlet flue 2 UNICOM;Described convection bank 4 is arranged in the vertical passage 16 outside burner hearth;Described Vertical passage 16 top and bottom respectively with bottom and back-end ductwork 20 UNICOM of secondary furnace 3;Described burner hearth 1 top is provided with explosion proof door, and middle part is provided with combustion-supporting tertiary air 10 and S-NCR denitration device 19, and bottom is provided with Slag device 11 and mucking machine 12.
Described low temperature air preheater 18 uses interior enamel pipe, is possible to prevent the stifled ash of low temperature, can avoid again low temperature Corrosion.
Described mucking machine 12 is for going out slag drying machine or going out wet slag machine.
Operation principle of the present utility model is as follows:
Coal dust sprays into membrane wall burner hearth 1, meanwhile, low temperature air preheater 18 and height by single or multiple burners 8 High temperature air after temperature air preheater 5 heating is mixed into burner hearth 1 also into burner 8 and powder body and strongly hangs Floating burning;And burner hearth arranges combustion-supporting tertiary air 10, is ensureing the clean-burning premise of uncombusted product The lower generation effectively stoping burner hearth coking and reduction nitrogen oxides.Arrange in the adaptive temperature interval of burner hearth 2 simultaneously The spout of S-NCR denitration device in stove, the nitrogen oxides generated in reduction part stove.Burn at burner hearth 1 High-temperature flue gas after heat exchange is transferred 180 ° from burner hearth outlet flue 2 and is downwardly into the secondary furnace 3 coupled with burner hearth, warp Flue gas after abundant after-flame heat exchange enters back into flowing bundle 4 faced by the flag in vertical passage 16 and carries out heat convection, Then flue gas enters back into S-CR13 denitration device and carries out nitrogen oxides reduction.The flue gas processed through denitration depends on again Secondary entrance high temperature air preheater 5, province's coal gas 14.Subsequently into cleaner unit 14 carry out dust removal process, enter back into low Temperature air preheater 18.Flue gas after abundant heat exchange enters SO2 cleaning system and purifies.Purify at SO2 In system, the sulfur dioxide in flue gas is disposed of.The preheated air of heat absorption sprays into stove from burner 8 again Thorax 1.Economizer 14, high temperature air preheater 5 low temperature air preheater 18 may utilize the waste heat of flue gas to boiler blow-down water and Air preheats, thus reaches waste heat recovery Posterior circle and utilize and energy-conservation purpose.
Owing to low temperature air preheater 18 is arranged on the rear portion of described cleaner unit 17, enter the flue gas temperature of cleaner unit 17 Degree is higher than 100 DEG C, and the moisture in flue gas will not produce condensation, thus does not affect dust removing effects.Low temperature air preheater 18 will lower the temperature further from cleaner unit 17 flue gas out, minimum are down to about 80 DEG C.By Theoretical Calculation, Flue-gas temperature often reduces by 12 DEG C, and the thermal efficiency of boiler can improve 1%.Therefore, this utility model can carry significantly The overall thermal efficiency of high boiler.
S-CR denitration device and the mode of S-NCR denitration device combined denitration, be in the feelings of high load capacity at boiler Under condition, select S-CR denitration device to carry out denitration, in the case of boiler is in underload, select S-NCR Denitration device carries out denitration, in the case of boiler is in special high load capacity, uses S-NCR denitration to set simultaneously Standby and S-CR denitration device carries out denitration, it is possible to decrease discharged nitrous oxides to below 100mg/nm3.Therefore, Combined denitration mode adapts to regulate load.Additionally, due to S-CR denitration device is arranged on back-end ductwork, The nearest, therefore it is easy to maintenance.
Save coal gas 14, upper collecting chamber 15, lower header 9, fin panel casing 7 and down-comer 6 and constitute compulsory water Blood circulation.For forced-circulation hot water boiler, backwater is entered economizer by water circulating pump from boiler blow-down water mouth 14, then entered the lower header 9 of boiler by connecting tube from economizer 14 outlet, by flag in the face of flowing bundle 4 Heat exchange absorbs heat and also flows up into boiler upper collecting chamber 15, and upper collecting chamber is by the down-comer 6 that is not heated again Sequentially enter lower header 9, the rising heat exchange fin panel casing 7 of series connection.Last hot water is from upper collecting chamber 15 top Boiler outlet sends boiler, forms forced water circulation.Recirculated water is all to rise flowing at whole high temperature heat-transfer surface. Therefore, the safety that boiler water (or oil) circulates it is greatly improved.
It is understood that above-described embodiment is simply to explanation of the present utility model rather than to this practicality newly The restriction of type, any without departing from the utility model creation in this utility model spirit, each fall within this reality Within novel protection domain.

Claims (8)

1. a coal dust hot-water boiler, including boiler body, the back-end ductwork (20) of described boiler body is provided with high temperature air preheater (5), cleaner unit (17) and low temperature air preheater (18), it is characterised in that described low temperature air preheater (18) is arranged on the rear portion of described cleaner unit (17).
2. a kind of coal dust hot-water boiler as claimed in claim 1, it is characterised in that be additionally provided with economizer (14) between described high temperature air preheater (5) and cleaner unit (17).
3. a kind of coal dust hot-water boiler as claimed in claim 1, it is characterized in that described boiler body includes that burner hearth (1), secondary furnace (3), convection bank (4), fin panel casing (7), burner (8), lower header (9) and upper collecting chamber (15), described lower header (9) and upper collecting chamber (15) are separately positioned on bottom and the top of boiler body;Described burner (8) is arranged on bottom or the front portion of described boiler furnace (1), and described boiler body uses pipe-support type structure, and 4 down-comers (6) are arranged in corner;The two ends up and down of described down-comer (6) and fin panel casing (7) respectively with described upper collecting chamber (15) and lower header (9) UNICOM;The top of described secondary furnace (3) and burner hearth outlet flue (2) UNICOM;Described convection bank (4) is arranged on the vertical passage (16) outside burner hearth Nei;Described vertical passage (16) top and bottom respectively with bottom and back-end ductwork (20) UNICOM of secondary furnace (3);Described burner hearth (1) top is provided with explosion proof door, and middle part is provided with combustion-supporting tertiary air (10), and bottom is provided with slag device (11) and mucking machine (12).
4. a kind of coal dust hot-water boiler as claimed in claim 3, it is characterised in that the middle part of described burner hearth (1) is additionally provided with S-NCR denitration device (19).
5. a kind of coal dust hot-water boiler as claimed in claim 1, it is characterised in that be additionally provided with S-CR denitration device (13) on the back-end ductwork (20) of described boiler body.
6. a kind of coal dust hot-water boiler as claimed in claim 1, it is characterised in that described low temperature air preheater (18) uses interior enamel pipe.
7. a kind of coal dust hot-water boiler as claimed in claim 3, it is characterised in that described mucking machine (12) is for going out slag drying machine or going out wet slag machine.
8. a kind of coal dust hot-water boiler as claimed in claim 3, it is characterised in that described convection bank (4) is flag facial canal.
CN201521091788.8U 2015-12-23 2015-12-23 Buggy boiler Expired - Fee Related CN205579960U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521091788.8U CN205579960U (en) 2015-12-23 2015-12-23 Buggy boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521091788.8U CN205579960U (en) 2015-12-23 2015-12-23 Buggy boiler

Publications (1)

Publication Number Publication Date
CN205579960U true CN205579960U (en) 2016-09-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201521091788.8U Expired - Fee Related CN205579960U (en) 2015-12-23 2015-12-23 Buggy boiler

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105485894A (en) * 2015-12-23 2016-04-13 杭州燃油锅炉有限公司 Pulverized coal type water heating boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105485894A (en) * 2015-12-23 2016-04-13 杭州燃油锅炉有限公司 Pulverized coal type water heating boiler

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1

Patentee after: Hangzhou environmental protection Polytron Technologies Inc

Address before: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1

Patentee before: Hangzhou Juneng Boiler Co., Ltd.

CP01 Change in the name or title of a patent holder
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160914

Termination date: 20191223

CF01 Termination of patent right due to non-payment of annual fee