CN206739256U - A kind of single backhaul WNS structure boilers - Google Patents

A kind of single backhaul WNS structure boilers Download PDF

Info

Publication number
CN206739256U
CN206739256U CN201720581392.4U CN201720581392U CN206739256U CN 206739256 U CN206739256 U CN 206739256U CN 201720581392 U CN201720581392 U CN 201720581392U CN 206739256 U CN206739256 U CN 206739256U
Authority
CN
China
Prior art keywords
gas
air
burner
smoke pipe
burner hearth
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.)
Active
Application number
CN201720581392.4U
Other languages
Chinese (zh)
Inventor
陈黎
文午琪
Original Assignee
陈黎
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 陈黎 filed Critical 陈黎
Priority to CN201720581392.4U priority Critical patent/CN206739256U/en
Application granted granted Critical
Publication of CN206739256U publication Critical patent/CN206739256U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

It the utility model is related to burning and heat energy conversion equipment technical field, and in particular to a kind of single backhaul WNS structure boilers, including:Switch board, burner, shell, burner hearth, smoke pipe group, water inlet, hot water or steam (vapor) outlet, energy-saving appliance and exhanst gas outlet, water inlet, hot water or steam (vapor) outlet and exhanst gas outlet are arranged on shell surface.Burner, burner hearth and smoke pipe group are to be sequentially connected;Fuel gas inlet is connected by conveyance conduit with gas nozzle;Burn the other end that head is arranged on installation body.Burner hearth and the smoke pipe group, which is arranged in shell, forms single return structures;Burner hearth is provided with exhanst gas outlet on the top of shell afterbody, energy-saving appliance is provided between exhanst gas outlet and smoke pipe group as gas approach.The utility model eliminates flue gas turning member, is designed as single return structures, and energy-saving appliance is changed to install in shell, makes structure more compact, convenient installation and transport;Burner resistance reduces, and air classification enters burner hearth, improves efficiency of combustion, also saves electric energy.

Description

A kind of single backhaul WNS structure boilers
【Technical field】
It the utility model is related to burning and heat energy conversion equipment technical field, and in particular to a kind of single backhaul WNS pans Stove.
【Background technology】
With the development of economy and modern science and technology, fuel oil and gas fired-boiler use economy due to its high combustion efficiency Cost is low, convenience in transport, and operation easy to use is simple to operate, and meets the requirement of sustainable development and environmental protection, turns into The first choice of boiler combustion raw material, and the one kind of WNS types boiler as fuel-oil or fuel-gas boiler, then again so that its is compact-sized, is beneficial to The advantages that installing, be safe for operation, is used by most of fuel-oil or fuel-gas boilers, and development trend is good, and market demand is high.
The existing WNS gas fired-boilers of in the market use three return-stroke type structures more, using High-speed DC burner, add back The high temperature movable parts such as room, front smoke box are fired, still, this structure has the problem of certain, such as:Burner gas velocity is high, makes It is big into burner resistance;Burner flame is elongated, and flame high-temperature region is concentrated, and can produce more NOx pollutants;Turn smoke-box structure ratio More complicated, manufacturing process is cumbersome, then higher with respect to manufacturing cost, and high temperature steering movable part easily produces flue gas leakage etc. and asked , larger potential safety hazard be present in topic;In order to meet caloric receptivity, it is necessary to heating surface is bigger, in order to conduct more fully, three return-stroke type knots There are two backhaul smoke pipes in structure and length is longer, cause boiler resistance big, burner resistance is big, it is necessary to consume more multi-energy;High temperature Movable part easily produces the problems such as flue gas leakage, larger potential safety hazard be present;DC burner flame is concentrated, the temperature of burning Degree is high, can produce more NOx pollutants.
In consideration of it, the defects of overcoming present in the prior art is the art urgent problem to be solved.
【Utility model content】
The utility model embodiment technical problems to be solved are:
The flame kernel temperature of existing three return-stroke types WNS burner for gas boiler is high, and pollutant NOx discharges more, flue gas The problem of backhaul is more, and smoke pipe part is longer, causes SR big, and the easy flue gas of high temperature movable part is revealed, is present larger Potential safety hazard;
On the other hand, the utility model proposes single backhaul WNS structure boilers can be also used for solving existing three return-stroke type Present in WNS gas fired-boilers:Parts are more, complicated, and manufacturing process is cumbersome, it is higher with respect to manufacturing cost the problems such as.
The utility model embodiment is to reach above-mentioned purpose by following technical solution:
A kind of single backhaul WNS structure boilers, including:Switch board, burner, shell, burner hearth, smoke pipe group, water inlet, hot water Or steam (vapor) outlet, energy-saving appliance and exhanst gas outlet, wherein, water inlet, hot water or steam (vapor) outlet and exhanst gas outlet are arranged on shell table Face.Switch board controls whole boiler operatiopn, and described burner, burner hearth and smoke pipe group are coaxially to be sequentially connected;Burner includes Blower fan, installation body, an air channel, secondary air duct, regulating valve, an air blade, overfire air jet, gas nozzle, burning head, combustion Gas import;Described blower fan is arranged on one end of installation body, and regulating valve is respectively arranged with an air channel and secondary air duct, leads to Cross control and regulation valve and air quantity is assigned to an air channel and secondary air duct;Fuel gas inlet is arranged on the middle section surface of installation body, Fuel gas inlet is connected by conveyance conduit with gas nozzle;Burn the other end that head is arranged on installation body.Described burner hearth and cigarette Pipe group, which is arranged in shell, forms single return structures;Corresponding smoke path, the burner hearth is as gas approach, in shell afterbody Top is provided with exhanst gas outlet, and energy-saving appliance is provided between exhanst gas outlet and smoke pipe group.
Further, burner is turbulent burner, in installing pipe body from center to outer ring be sequentially arranged once air channel, Gas pipeline and secondary air duct;Primary air nozzle is arranged to swirl vane formula, and Gas Pipe road junction and overfiren air port are arranged to nozzle-type. Air blade, gas nozzle and overfire air jet composition burn head.The flow rates of First air and Secondary Air are 20~30m/s, The flow rates of combustion gas are 50~60m/s.
Further, for burner hearth by tube sheet and smoke pipe bond pads, burner hearth is waveform configuration, and the structure is absorbable because burning Heated and caused expansion, prevent from causing to rupture because of thermal stress.
Further, described smoke pipe group is more threaded flues or more inner fin smoke pipe compositions, and smoke pipe is in shell , can be for equilateral triangle equidistant arrangement or with burner hearth to surrounding dense distribution, threaded flue centered on the axis of burner hearth on section Center line is the arrangement of the arc length such as the center of circle.
The beneficial effect of the utility model embodiment is:
1st, a kind of single backhaul WNS structure boilers provided by the utility model, using integral structure turbulent burner, pass through The air quantity and blast of First air and Secondary Air are controlled, so as to control flame size, to adapt to chamber structure, prevents flame contact stove Thorax inwall, burns out burner hearth.This burner gas flow rate is high and air velocity is low, using current difference and air swirl, improves empty Gas and combustion gas mixing speed, guarantee combustion gas and air are thoroughly mixed, and are well mixed in burner hearth and are fully burnt.
2nd, burner of the present utility model has the characteristics of central backflow, the high-temperature flue gas of flame periphery is back to Burn at head, strengthen flue gas and mixed with combustion gas, air at burning head, improve temperature herein, improve the ignition condition of fuel, Make this boiler incendivity pluralities of fuel, the enough stable flame of and can, avoid being tempered and take off fire.
3rd, the combustion system of this classification of the present utility model, increases considerably the Contact Boundary of combustion gas and air, makes Obtain high-temperature region temperature and oxygen concentration has declined, reduce NOx growing amount.
4th, the utility model is different from existing three return structures in market, eliminates front smoke box, return combustion chamber, three backhaul smoke pipes Deng part, single return structures are designed as, simplify boiler structure, when reducing the consumption manufacture difficulty of steel and shortening manufacture Between, energy-saving appliance is installed by the outside of in the market, is changed to install in shell so that the structure of boiler is more compact, reduces body Product, integration is overall to dispatch from the factory, convenient installation and transport.
【Brief description of the drawings】
, below will be in the utility model embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment The required accompanying drawing used is briefly described.It should be evident that drawings described below is only of the present utility model one A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these Accompanying drawing obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of single backhaul WNS structure boilers;
Fig. 2 is a kind of burner structure front view of single backhaul WNS structure boilers;
Fig. 3 is a kind of burner structure side view of single backhaul WNS structure boilers;
Wherein:1st, shell;2nd, switch board;3rd, burner hearth;4th, burner;5th, smoke pipe group;6th, water inlet;7th, hot water or steam go out Mouthful;8th, energy-saving appliance;9th, exhanst gas outlet;10th, blower fan;The 11st, body is installed;12nd, an air channel;13rd, secondary air duct;14th, regulating valve; 15th, gas nozzle;16th, head is burnt;17th, swirl vane;18th, nozzle;19th, fuel gas inlet.
【Embodiment】
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.
In description of the present utility model, term " interior ", " outer ", " longitudinal direction ", " transverse direction ", " on ", " under ", " top ", " bottom " Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this practicality newly Type rather than require that the utility model must be with specific azimuth configuration and operation, therefore be not construed as to the utility model Limitation.
As long as in addition, technical characteristic involved in each embodiment of the utility model disclosed below each other it Between do not form conflict can be mutually combined.Refer to the attached drawing and embodiment are combined to describe the utility model in detail below.
Embodiment 1:
As shown in Figures 1 to 3, the utility model embodiment 1 provides a kind of single backhaul WNS structure boilers, including:Switch board 2nd, burner 4, shell 1, burner hearth 3, smoke pipe group 5, water inlet 6, hot water or steam (vapor) outlet 7, energy-saving appliance 8 and exhanst gas outlet 9, its In, water inlet 6, hot water or steam (vapor) outlet 7 and exhanst gas outlet 9 are arranged on the surface of shell 1, it is characterised in that:Switch board 2 controls whole Individual boiler operatiopn, the boiler can vertical or horizontal arrangements.
As shown in Fig. 1~2, burner 4, burner hearth 3 and smoke pipe group 5 are sequentially connected;Wherein, burner 4, burner hearth 3 and smoke pipe 5 three's connected modes of group preferably use coaxial manner;Burner 4 can be single hop ignition combustor, double sections of ignition combustors, ratio tune Burner etc. is saved, preferably turbulent burner, the burner 4 include herein:11, blower fan 10, installation body air channels 12, two Secondary air channel 13, regulating valve 14, gas nozzle 15, burn first 16, fuel gas inlet 19;Described blower fan 10 is arranged on installation body 11 One end, is respectively arranged with automatic regulating valve 14 in an air channel 12 and secondary air duct 13, from center to outer ring in installation body 11 It is sequentially arranged once air channel 12, gas pipeline and secondary air duct 13;As shown in figure 3, the outlet in an air channel 12 is arranged to revolve The formula of blade 17 is flowed, Gas Pipe road junction and the outlet of secondary air duct 13 are arranged to the formula of nozzle 18.
As shown in Fig. 2 air quantity is assigned to an air channel 12 and secondary air duct 13 by controlling to adjust valve 14 so that flame Shape can be adjusted by changing air quantity and blast.Combustion air is divided into First air and Secondary Air, enters burner hearth by different pipelines 3, First air is eddy flow, controls flame diameter;Secondary Air is direct current, controls the length of flame.Fuel gas inlet 19 is arranged on installing pipe The middle section surface of body 11, fuel gas inlet 19 are connected by conveyance conduit with gas nozzle 15;Described burning first 16 is arranged on installation The other end of body 11.
As shown in figure 1, burner hearth 3 and smoke pipe group 5 are arranged in shell 1 and form single return structures;Burner hearth 3 and smoke pipe group 5 are pacified In shell 1;Smoke pipe group 5 is that more smoke pipes form, and smoke pipe is on the section of shell 1, to four centered on the axis of burner hearth 3 All dense distributions, it is equilateral triangle equidistant arrangement or the arc length arrangement such as by the center of circle of the center line of burner hearth 3 between smoke pipe, increases heat and hand over Change area.
Corresponding smoke path, the burner hearth 3 are used as gas approach, the top of the afterbody of shell 1 are provided with exhanst gas outlet 9, Energy-saving appliance 8 is provided between exhanst gas outlet 9 and smoke pipe group 5.Wherein, burner hearth 3 is welded by tube sheet and smoke pipe group 5, it is preferred that Burner hearth 3 is waveform configuration, and the structure is absorbable because burning heated and caused expansion, prevents from causing brokenly because of thermal stress Split.Smoke pipe can be threaded flue, inner fin smoke pipe etc., and smoke pipe group 5 is preferably made up of more threaded flues herein, threaded flue Usual spiral is suppressed with 2mm groove on tube wall, and such groove structure, which is set, can abolish heat transfer flow boundary layer, strengthens cigarette Gas side disturbs, and increases heat exchange area, heat transfer coefficient increase, increases heat transfer efficiency.Air stream in burner 4 when the boiler works Speed is less than gas flow rate, and the flow rates of combustion gas are controlled in 50~60m/s, and the flow rates control of First air and Secondary Air is 20 ~30m/s, the combination of groove and smoke pipe arrangement so that in the case where smoke pipe length is reduced, not only keep rational cigarette Gas velocity, there is the heat exchange area of abundance again.
As depicted in figs. 1 and 2, the one of which structure combination based on the boiler, is illustrated to its course of work.Work When, switch board 2 assigns work order to boiler, and combustion gas enters gas nozzle 15 by fuel gas inlet 19, and air is as combustion air point Do not entered by an air channel 12 and secondary air duct 13, adjust the regulating valve 14 in an air channel 12 and secondary air duct 13, control respectively The air quantity and blast of First air and Secondary Air processed, so as to adjust the length and diameter of burning flame on first 16 so that flame size is fitted The size of burner hearth 3 is answered, full of burner hearth 3.By the flow control of combustion air in 20-30m/s, and First air ratio is less than secondary Wind ratio, raising efficiency of combustion can be reached, gas flow rate is higher than air velocity, using current difference and air swirl, improves empty Gas and combustion gas mixing speed, guarantee combustion gas and air are thoroughly mixed burning, the combustion system of this classification, make combustion gas and air Contact Boundary increase, high-temperature region temperature and oxygen concentration declined, and reducing reduces pollutant NOx discharge capacity, it also avoid De- fire and the situation of tempering occur.
Further, the turbulent burner 4 can produce central backflow, make high temperature gases recirculating around burner hearth 3 to burning head At 16, strengthen flue gas and mixed with combustion gas, air at burning first 16, improve temperature herein, improve catching fire for burning first 16 Condition so that the boiler is applicable to the fuel combustion of wider calorific value, such as:Belong to the blast furnace gas of low heat value, carbon black coal Gas etc., belong to natural gas, coke-stove gas of high heating value etc..Combustion gas enters smoke pipe by flue gas fully caused by burning from burner hearth 3 Group 5, smoke pipe may be disposed so that it is more intensive closer to the axis of burner hearth 3, then can be faster and more from burner hearth 3 export high temperature cigarette Gas, carries out heat exchange with water in time, and high-temperature flue gas makes flue gas produce condensation, recovery is more by entering energy-saving appliance 8 after smoke pipe Heat.Flue gas can obtain hot water or steam by being flowed out after energy-saving appliance 8 from exhanst gas outlet 9 at hot water or steam (vapor) outlet 7.
Embodiment 2:
On the basis of above example 1, when requiring ultra-low NOx emission, such as require that NOx discharge is less than 30mg/ Nm3, said structure can not meet emission request, can be based on above-mentioned boiler structure increase flue gas recirculation device, by flue gas again Input burner hearth 3 burns, to reduce NOx emission.
Specifically, between exhanst gas outlet 9 and blower fan 10, flue gas recirculation device, flue gas recirculation device are set outside shell 1 Including wind-mixer, air-valve, controlling valve and connecting tube, blower fan 10 is connected by connecting tube with exhanst gas outlet 9, and controlling valve is arranged on regulation and control Pipe stage casing, the exhaust gas volumn of circulation is controlled by adjusting the aperture of controlling valve.The air of described wind-mixer and blower fan 10 enters Mouth connection, air-valve control the open and close of wind-mixer.When boiler works, high-temperature flue gas is after the condensation of energy-saving appliance 8, by cigarette Enter connecting tube at gas outlet 9, flue gas is mixed input burner hearth 3 again and burnt by wind-mixer with air, so as to reduce NOx Discharge capacity so that boiler tail flue gas more conforms to environmental requirement.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model Protection domain within.

Claims (8)

1. a kind of single backhaul WNS structure boilers, including:Switch board (2), burner (4), shell (1), burner hearth (3), smoke pipe group (5), water inlet (6), hot water or steam (vapor) outlet (7), energy-saving appliance (8) and exhanst gas outlet (9), water inlet (6), hot water or the steaming Vapor outlet (7) and exhanst gas outlet (9) are arranged on shell (1) surface, it is characterised in that:Switch board (2) controls whole boiler operatiopn, Described burner (4), burner hearth (3) and smoke pipe group (5) is sequentially connected;Burner hearth (3) and smoke pipe group (5) are arranged in shell (1) Form single return structures;Corresponding smoke path, the burner hearth (3) are used as gas approach, are provided with the top of shell (1) afterbody Exhanst gas outlet (9), energy-saving appliance (8) is provided between exhanst gas outlet (9) and smoke pipe group (5).
2. single backhaul WNS structure boilers according to claim 1, it is characterised in that:Described burner (4) includes:Wind Machine (10), installation body (11), an air channel (12), secondary air duct (13), regulating valve (14), burning head (16) and fuel gas inlet (19);Described blower fan (10) is arranged on one end of installation body (11), and an air channel (12) and secondary air duct (13) are interior respectively Regulating valve (14) is provided with, air quantity is assigned to an air channel (12) and secondary air duct (13) by controlling to adjust valve (14);Combustion Gas import (19) is arranged on the middle section surface of installation body (11), and fuel gas inlet (19) passes through conveyance conduit and gas nozzle (15) Connection;Described burning head (16) is arranged on the other end of installation body (11).
3. single backhaul WNS structure boilers according to claim 2, it is characterised in that:Described burner (4) fires for eddy flow Burner, installation body (11) is interior to be sequentially arranged once air channel (12), gas pipeline and secondary air duct (13) from center to outer ring; Primary air nozzle is arranged to swirl vane (17) formula, and Gas Pipe road junction and overfiren air port are arranged to nozzle (18) formula;Air blade, Gas nozzle (15) and overfire air jet (18) composition burn head (16).
4. single backhaul WNS structure boilers according to claim 3, it is characterised in that:Described burner (4) interior air stream Speed is less than gas flow rate, and the flow rates of combustion gas are 50~60m/s, and the flow rates of First air and Secondary Air are 20~30m/s.
5. single backhaul WNS structure boilers according to claim 1, it is characterised in that:Described burner hearth (3) by tube sheet with Smoke pipe group (5) is welded, and burner hearth (3) is waveform configuration.
6. single backhaul WNS structure boilers according to claim 1, it is characterised in that:Described smoke pipe group (5) is screw thread cigarette Pipe group (5) or inner fin smoke pipe group (5).
7. single backhaul WNS structure boilers according to claim 6, it is characterised in that:Described smoke pipe group (5) is more cigarettes Pipe forms, and smoke pipe is on the section of shell (1), is just between smoke pipe to surrounding dense distribution centered on the axis of burner hearth (3) Triangle equidistant arrangement arranges by arc length such as the centers of circle of burner hearth (3) center line.
8. single backhaul WNS structure boilers according to claim 1, it is characterised in that:Described exhanst gas outlet (9) and blower fan (10) between, flue gas recirculation device is installed outside shell (1), flue gas recirculation device includes wind-mixer, stop valve, controlling valve And blower fan (10) is connected by connecting tube, connecting tube with exhanst gas outlet (9), controlling valve is arranged on connecting tube stage casing, passes through controlling valve Aperture control amount of circulating gas, described wind-mixer is connected with blower fan (10) import, and stop valve controls the unlatching of wind-mixer With closing.
CN201720581392.4U 2017-05-23 2017-05-23 A kind of single backhaul WNS structure boilers Active CN206739256U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720581392.4U CN206739256U (en) 2017-05-23 2017-05-23 A kind of single backhaul WNS structure boilers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720581392.4U CN206739256U (en) 2017-05-23 2017-05-23 A kind of single backhaul WNS structure boilers

Publications (1)

Publication Number Publication Date
CN206739256U true CN206739256U (en) 2017-12-12

Family

ID=60567699

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720581392.4U Active CN206739256U (en) 2017-05-23 2017-05-23 A kind of single backhaul WNS structure boilers

Country Status (1)

Country Link
CN (1) CN206739256U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110887032A (en) * 2019-09-20 2020-03-17 江苏双良锅炉有限公司 Natural gas cold flame combustion horizontal fire tube steam boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110887032A (en) * 2019-09-20 2020-03-17 江苏双良锅炉有限公司 Natural gas cold flame combustion horizontal fire tube steam boiler

Similar Documents

Publication Publication Date Title
CN101846315B (en) Coal dust concentration device and coal dust burner with same
CN101725969B (en) Low-NOx pulverized coal burner
WO2015103831A1 (en) Fuel/gas-saving ignition and stable-combustion low-nitrogen swirling pulverized coal combustor
CN202002096U (en) Water-coal-slurry low-nitrogen swirl burner
CN104180368A (en) Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN201475997U (en) Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content
CN206739256U (en) A kind of single backhaul WNS structure boilers
CN203036634U (en) Fractional combustion low-nitrogen oxide rotational flow burner
CN108870383A (en) A kind of pulverized-coal fired boiler low NOx combustion system
CN103727536B (en) The multistage adjustable strong and weak rotation flow impact gas burner of ultralow nitrogen
CN107388221A (en) A kind of ultralow nitrogen condensation horizontal steam boiler of four backhauls
CN205717142U (en) Biomass double furnace thorax gas-steam boiler and combustion system thereof
CN204987008U (en) Bispin STREAMING low heat value gas combustion ware
CN208025506U (en) A kind of coal burner
CN208901372U (en) A kind of pulverized-coal fired boiler low NOx combustion system
CN208779450U (en) A kind of ultralow NOX combustion system and its burner of low-load combustion-stabilizing
CN208418701U (en) A kind of low-NOx combustor for biomass and combustion of natural gas
CN203116001U (en) Low nitrogen powder fuel combustor
CN202902293U (en) Low odor type reed pulp black liquor combustion boiler
CN104121579A (en) Boiler provided with dual-register pulverized coal burner on top
CN204176635U (en) The boiler of two tune wind coal burner overhead
CN201606876U (en) Low-NOx coal burner
CN205919314U (en) Double -furnace thorax coal powder gasification low -nitrogen combustion industrial boiler
CN205480998U (en) Two low -nitrogen combustion machines that fire of gas -solid
CN104154532A (en) Center air ring concentrated type turbulent burner

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant