CN205717142U - Biomass double furnace thorax gas-steam boiler and combustion system thereof - Google Patents

Biomass double furnace thorax gas-steam boiler and combustion system thereof Download PDF

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Publication number
CN205717142U
CN205717142U CN201620335097.6U CN201620335097U CN205717142U CN 205717142 U CN205717142 U CN 205717142U CN 201620335097 U CN201620335097 U CN 201620335097U CN 205717142 U CN205717142 U CN 205717142U
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China
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boiler
combustion
gas
smoke pipe
grades
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CN201620335097.6U
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Chinese (zh)
Inventor
朱活强
张湘波
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广州优的新能源科技有限公司
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Priority to CN201620335097.6U priority Critical patent/CN205717142U/en
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Abstract

The open a kind of biomass double furnace thorax gas-steam boiler of this utility model, including boiler body, middle and lower part in boiler body is provided with two combustion tubes that horizontal alignment is arranged, return combustion chamber, front smoke box, the second backhaul smoke pipe and the 3rd backhaul smoke pipe are also installed inside boiler body, the rear end of two combustion tubes connects return combustion chamber, the two ends of the second backhaul smoke pipe connect return combustion chamber and front smoke box respectively, one end of 3rd backhaul smoke pipe connects front smoke box, and the other end of the 3rd backhaul smoke pipe connects the waste gas outlet on rear side of boiler body;This utility model is also disclosed a kind of combustion system, including biomass double furnace thorax gas-steam boiler, gasification furnace, energy-saving appliance and air preheater, gasification furnace connects two flue holes, provides combustion gas for two combustion tubes, and the waste gas outlet of return combustion chamber is sequentially connected with energy-saving appliance and air preheater.This utility model uses double-furnace structure, and radiation heating-surface is significantly increased, and enhances radiation heat transfer, and exhaust gas temperature is low, and the thermal efficiency is high.

Description

Biomass double furnace thorax gas-steam boiler and combustion system thereof

Technical field

This utility model relates to burning boiler and combustion system technical field, is specially one raw Material twin furnace gas-steam boiler and combustion system thereof.

Background technology

Traditional biomass fuel boiler is developed through years of researches, in Industrial Boiler field It is used widely, energy-saving and emission-reduction have been made great contribution.But traditional biomass boiler It is difficult to effectively control the generation of nitrogen oxides in combustion, has a strong impact on emission effect. Biological mass gas burnnig boiler effect in terms of effectively reducing the discharge of nitrogen oxides is notable, due to it Boiler body size limitation and the low characteristic of biomass fuel calorific value, boiler rating Design receives certain restriction.The rated capacity of single burner hearth biological fuel gas steam boiler Typically≤10t/h, the serious marketing constraining biological fuel gas steam boiler.

Utility model content

In order to overcome the problem that prior art biological fuel gas steam boiler evaporation capacity is not enough, this Utility model provides a kind of biomass double furnace thorax gas-steam boiler and combustion system thereof, passes through Related art method is taked to make biological mass gas burnnig boiler break through the restriction of rated capacity.

This utility model solves the technical scheme is that biomass double furnace of its technical problem Thorax gas-steam boiler, including boiler body, the header board of described boiler body offers two Flue hole, the middle and lower part in described boiler body is provided with two burnings that horizontal alignment is arranged Pipe, also installs return combustion chamber, front smoke box, the second backhaul smoke pipe and the inside described boiler body Three backhaul smoke pipes, described front smoke box is located at the front end in boiler body, and described return combustion chamber is located at Rear end in boiler body, described second backhaul smoke pipe is placed in described combustion tube and the described 3rd Between backhaul smoke pipe height, the front end of described two combustion tubes connects two flue holes respectively, The rear end of described two combustion tubes connects described return combustion chamber, the two ends of described second backhaul smoke pipe Connecting described return combustion chamber and front smoke box respectively, one end of described 3rd backhaul smoke pipe connects described Front smoke box, the other end of described 3rd backhaul smoke pipe connects the waste gas on rear side of described boiler body Outlet.Return combustion chamber, the second backhaul smoke pipe and the 3rd return smoke pipe is utilized to form convection heating surface. Wherein, a diameter of 63.5mm of the second backhaul smoke pipe, the high temperature produced after combustion tube burns Flue gas enters the second backhaul smoke pipe by return combustion chamber, and its flow velocity is maintained at about 20m/s, logical Cross tube wall release heat;Flue gas is through the second backhaul smoke pipe, by the front smoke box that boiler is anterior, Entering the 3rd backhaul smoke pipe, a diameter of 63.5mm of the 3rd backhaul smoke pipe, its flow velocity is maintained at About 22m/s, discharges heat by tube wall, finally discharges boiler body.

Further, the junction, two ends of described combustion tube is the taper that ecto-entad expands, Its tapering is 20 °-45 °;The sidewall of described combustion tube is evenly equipped with several heat exchange caved inward Groove, strengthens the heat exchange area of combustion tube and water.

Further, the most described boiler body of the maximum outside diameter of described combustion tube is internal wide The 1/3 of degree, the bottom of described combustion tube is described with the distance of described boiler body inner bottom part The 1/9 of the distance of the top of combustion tube and described boiler body inner top.

Additionally, this utility model also provides for a kind of biomass double furnace thorax gas-steam boiler burning System, it include above-mentioned biomass double furnace thorax gas-steam boiler, gasification furnace, energy-saving appliance and Air preheater, described gasification furnace connects two described flue holes, provides for described two combustion tubes Combustion gas, the waste gas outlet of described return combustion chamber is sequentially connected with described energy-saving appliance and air preheater.

Wherein, the quantity of described gasification furnace is two, and respectively two combustion tubes provide combustion gas.

Described gasification furnace includes body of heater, is sequentially provided with primary vaporizer and two grades in described body of heater Vaporizer, the bottom connection of described primary vaporizer and two grades of vaporizers, described primary gasification The top of room offers feeding mouth, and the bottom of described primary vaporizer and two grades of vaporizers is installed Move in circles fire-grating machine, described in move in circles fire-grating machine constantly by biomass fuel from institute State primary vaporizer to be pushed in two grades of vaporizers and carry out gasification, and combustion, described primary vaporizer Offer with the top of two grades of vaporizers and connect described primary vaporizer and the low temperature of two grades of vaporizers Gas outlet, described body of heater is provided with the first blower fan, and described first blower fan is to described primary Carrying out air blast in vaporizer and two grades of vaporizers, the back side top of described two grades of vaporizers is provided with Gas outlet pipe, described gas outlet pipe connects described flue hole.

Being also equipped with the second air compartment on described body of heater, described gas outlet pipe passes described second Air compartment, described second air compartment is provided with annular air pipeline, described annular air duct wraps institute Stating gas outlet pipe, described second air compartment is provided with the second air port, described body of heater is provided with Second blower fan, described second blower fan connects described second air port and to drum in described second air compartment Wind;The sidewall of described annular air pipeline is provided with the connector connecting boiler, and described annular goes out It is also equipped with spinning disk at wind pipeline end outlet, prevents the joint with boiler from being burnt by high temperature Damage.

The beneficial effects of the utility model are:

● break through the restriction of biological mass gas burnnig boiler rated capacity, use double-furnace structure, The rated capacity of 10~20t/h can be produced.

● radiation heating-surface is significantly increased, and enhances radiation heat transfer, and exhaust gas temperature is low, thermal effect Rate is high.

● being conducive to the layout of convection heating surface, boiler body is compact, easy transportation and installation, Reduce manufacturing cost.

● use fuel-staged combustion technology, gasification generation chamber in fuel-rich regions anoxycausis, Boiler furnace many level air-distributions efficient burning, can effectively reduce NOx and generate, and fume emission is up to standard.

Accompanying drawing explanation

Fig. 1 is the structure of this utility model biomass double furnace thorax gas-steam boiler combustion system Schematic front view;

Fig. 2 is the structure of this utility model biomass double furnace thorax gas-steam boiler combustion system Schematic top plan view;

Fig. 3 is the gas in this utility model biomass double furnace thorax gas-steam boiler combustion system Change furnace structure schematic front view.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is further detailed.Wherein, Wen Zhongguan Describe using Fig. 1 as standard before and after orientation.

As it is shown in figure 1, biomass double furnace thorax gas-steam boiler, including boiler body 1, institute State and on the front tube sheet of boiler body 1, offer two flue holes, in described boiler body 1 Middle and lower part is provided with two combustion tubes 2 that horizontal alignment is arranged, and described boiler body 1 is internal Return combustion chamber 3, front smoke box the 11, second backhaul smoke pipe 12 and the 3rd backhaul smoke pipe 13 are also installed, Described front smoke box 11 is located at the front end in boiler body 1, and described return combustion chamber 3 is located at boiler originally Rear end in body 1, described second backhaul smoke pipe 12 be placed in described combustion tube with described 3rd time Between journey smoke pipe 13 height, the front end of described two combustion tubes 2 connects two flue holes respectively, The rear end of described two combustion tubes 2 connects described return combustion chamber 3, described second backhaul smoke pipe 12 Two ends connect described return combustion chamber 3 and front smoke box 11, described 3rd backhaul smoke pipe 13 respectively One end connect described front smoke box 11, the other end of described 3rd backhaul smoke pipe 13 connects institute State the waste gas outlet on rear side of boiler body 1.Utilize combustion tube the 2, second backhaul smoke pipe 12 and 3rd backhaul smoke pipe 13 forms convection heating surface.Wherein, the diameter of the second backhaul smoke pipe 12 For 63.5mm, the high-temperature flue gas produced after combustion tube 2 burns enters the by return combustion chamber 3 Two return smoke pipe 12, its flow velocity is maintained at about 20m/s, discharges heat by tube wall;Cigarette Gas, through the second backhaul smoke pipe 12, by the front smoke box 11 that boiler is anterior, enters back into the 3rd time Journey smoke pipe 13, a diameter of 63.5mm of the 3rd backhaul smoke pipe, it is left that its flow velocity is maintained at 22m/s The right side, discharges heat by tube wall, finally discharges boiler body.

Further, the junction, two ends of described combustion tube 2 is the taper that ecto-entad expands, Its tapering is 20 °-45 °;What the sidewall of described combustion tube 2 was evenly equipped with that several cave inward changes Heat channel, strengthens the heat exchange area of combustion tube and water.

Further, inside the most described boiler body of maximum outside diameter of described combustion tube 2 The 1/3 of width, the bottom of described combustion tube is institute with the distance of described boiler body inner bottom part State the 1/9 of the top of combustion tube and the distance of described boiler body inner top.

The key problem in technology of this biomass double furnace thorax gas-steam boiler is to use two flues the most double Chamber structure form.Owing to biological fuel gas calorific value is relatively low, about 1500kcal/m3 is low The fuel of calorific value reaches the rated capacity of boiler design and needs more heating surface.Work as biology During matter gas fired-boiler design rated capacity > 10t/h, if using single burner hearth, then because The radiation heating-surface of burner hearth is few, needs to arrange more convection heating surface, but due to boiler basis Body size limitation, convection heating surface is difficult to reasonable Arrangement, and the heat transfer of convection heating surface is imitated The poorest, it is possible to the Radiant exothermicity causing burner hearth is not enough, and furnace outlet gas temperature reaches 1000 DEG C Above, thus causing high fume temperature, boiler thermal output is low;Therefore when biomass fuel steam pot During stove design rated capacity > 10t/h, use the boiler structure of twin furnace, effectively increase Add radiation heating-surface, because the intensity of radiation heat transfer is much higher than the intensity of heat convection, The heat more than 65% of biomass fuel gas firing release is absorbed by burner hearth, the cigarette of convection heating surface Gas velocity maintains the zone of reasonableness of 18-25m/s, and exhaust gas temperature is low, about 140 DEG C Left and right, boiler thermal output is up to more than 95%, and it is more reasonable that the structure of boiler is arranged.

Additionally, this utility model also provides for a kind of biomass double furnace thorax gas-steam boiler burning System, it includes above-mentioned biomass double furnace thorax gas-steam boiler, gasification furnace 4, energy-saving appliance 5 And air preheater 6, described gasification furnace 4 connects two described flue holes, for described two burnings Pipe 2 provide combustion gas, the waste gas outlet of described return combustion chamber 3 be sequentially connected with described energy-saving appliance 5 and Air preheater 6.

Wherein, the quantity of described gasification furnace 4 is two, and respectively two combustion tubes 2 provide Combustion gas.

Described gasification furnace 4 includes body of heater 41, is sequentially provided with primary gasification in described body of heater 41 Room 411 and two grades of vaporizers 412, described primary vaporizer 411 and two grades of vaporizers 412 Bottom connection, the top of described primary vaporizer 411 offers feeding mouth, described primary The bottom of vaporizer 411 and two grades of vaporizers 412 is provided with the fire-grating machine 42 that moves in circles, institute State the fire-grating machine 42 that moves in circles constantly to be pushed away from described primary vaporizer 411 by biomass fuel Enter to two grades of vaporizers 412, carry out gasification, and combustion, described primary vaporizer 411 and two grades The low temperature combustion of the described primary vaporizer of connection and two grades of vaporizers is offered on the top of vaporizer 412 Gas exports, and described body of heater 41 is provided with the first blower fan 43, and described first blower fan 43 is to institute Air blast, described two grades of vaporizers are carried out in stating primary vaporizer 411 and two grades of vaporizers 412 The back side top of 412 is provided with gas outlet pipe 44, and described gas outlet pipe 44 connects described stove Gallbladder hole.

Being also equipped with the second air compartment 415 on described body of heater 41, described gas outlet pipe 44 is worn Crossing described second air compartment 415, described second air compartment 415 is provided with annular air pipeline 416, institute State annular air pipeline 416 and wrap up described gas outlet pipe 44, on described second air compartment 416 Being provided with the second air port, described body of heater 41 is provided with the second blower fan, described second blower fan connects Described second air port to air blast in described second air compartment;Described annular air pipeline 416 Sidewall is provided with the connector connecting boiler, at described annular air pipeline 416 end outlet also Spinning disk 417 is installed, prevents the joint with boiler by high temperature scaling loss.

Native system uses double biomass gas gasifying stove+twin furnace steam boiler.Biological fuel gas Generating gasification stokehold is arranged, the combustible gas of generation is connected to the combustion tube 2 of twin furnace steam boiler Interior burning, the many level air-distributions mixed combustion being provided with by path according to combustion gas in combustion tube 2. Biological fuel gas is in the combustion tube 2 of twin furnace after combustion heat-exchange, and high-temperature flue gas enters back into Two, the convection heating surface of three backhauls carries out heat exchange.Body exhanst gas outlet connects efficient energy-saving device 5 one pipe groups, are followed by two-stage air preheater 6, improve into stove air themperature.Gasification furnace 4, Biomass double furnace thorax gas-steam boiler, energy-saving appliance 5 and air preheater 6 all use streamlined setting Meter, good looking appearance is generous.

As described above, preferred embodiment the most of the present utility model, when can not be with this Limit the scope that this utility model is implemented, the most generally according to this utility model claim and The simple equivalence that utility model description is made changes and modifies, and the most still belongs to this practicality new In the range of type patent contains.

Claims (8)

  1. null1. biomass double furnace thorax gas-steam boiler,Including boiler body,It is characterized in that,Two flue holes are offered on the header board of described boiler body,Middle and lower part in described boiler body is provided with two combustion tubes that horizontal alignment is arranged,Return combustion chamber is also installed inside described boiler body、Front smoke box、Second backhaul smoke pipe and the 3rd backhaul smoke pipe,Described front smoke box is located at the front end in boiler body,Described return combustion chamber is located at the rear end in boiler body,Described second backhaul smoke pipe is placed between described combustion tube and described 3rd backhaul smoke pipe height,The front end of described two combustion tubes connects two flue holes respectively,The rear end of described two combustion tubes connects described return combustion chamber,The two ends of described second backhaul smoke pipe connect described return combustion chamber and front smoke box respectively,One end of described 3rd backhaul smoke pipe connects described front smoke box,The other end of described 3rd backhaul smoke pipe connects the waste gas outlet on rear side of described boiler body.
  2. Biomass double furnace thorax gas-steam boiler the most according to claim 1, it is characterised in that the junction, two ends of described combustion tube is the taper that ecto-entad expands.
  3. Biomass double furnace thorax gas-steam boiler the most according to claim 2, it is characterised in that the tapering at described combustion tube two ends is 20 °-45 °.
  4. Biomass double furnace thorax gas-steam boiler the most according to claim 1, it is characterised in that the sidewall of described combustion tube is evenly equipped with several heat exchange grooves caved inward.
  5. Biomass double furnace thorax gas-steam boiler the most according to claim 1, it is characterized in that, the top that distance is described combustion tube of the 1/3 of the maximum outside diameter the most described boiler body inner width of described combustion tube, the bottom of described combustion tube and described boiler body inner bottom part and the 1/9 of the distance of described boiler body inner top.
  6. 6. a biomass double furnace thorax gas-steam boiler combustion system, it is characterized in that, including the claims 1-5 arbitrary described biomass double furnace thorax gas-steam boiler, gasification furnace, energy-saving appliance and air preheater, described gasification furnace connects two described flue holes, thering is provided combustion gas for described two combustion tubes, the waste gas outlet of described return combustion chamber is sequentially connected with described energy-saving appliance and air preheater.
  7. A kind of biomass double furnace thorax gas-steam boiler combustion system the most according to claim 6, it is characterised in that the quantity of described gasification furnace is two.
  8. nullA kind of biomass double furnace thorax gas-steam boiler combustion system the most according to claim 6,It is characterized in that,Described gasification furnace includes body of heater,Primary vaporizer and two grades of vaporizers it are sequentially provided with in described body of heater,The bottom connection of described primary vaporizer and two grades of vaporizers,The top of described primary vaporizer offers feeding mouth,The bottom of described primary vaporizer and two grades of vaporizers is provided with the fire-grating machine that moves in circles,Biomass fuel is constantly pushed into two grades of vaporizers from described primary vaporizer and carries out gasification, and combustion by the described fire-grating machine that moves in circles,The described primary vaporizer of connection and the low temperature gas outlet of two grades of vaporizers are offered in the top of described primary vaporizer and two grades of vaporizers,First blower fan is installed on described body of heater,Described first blower fan carries out air blast in described primary vaporizer and two grades of vaporizers,The back side top of described two grades of vaporizers is provided with gas outlet pipe,Described gas outlet pipe connects described flue hole.
CN201620335097.6U 2016-04-19 2016-04-19 Biomass double furnace thorax gas-steam boiler and combustion system thereof CN205717142U (en)

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CN201620335097.6U CN205717142U (en) 2016-04-19 2016-04-19 Biomass double furnace thorax gas-steam boiler and combustion system thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107560165A (en) * 2017-10-11 2018-01-09 苏州和必尔斯电子科技有限公司 A kind of multiple hearth hot type environment protection thermal hydrophone
CN107917428A (en) * 2017-11-28 2018-04-17 湖南长宏南雁锅炉修理安装有限公司 The refuse pyrolysis steam pot furnace system of high-efficiency environment friendly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107560165A (en) * 2017-10-11 2018-01-09 苏州和必尔斯电子科技有限公司 A kind of multiple hearth hot type environment protection thermal hydrophone
CN107917428A (en) * 2017-11-28 2018-04-17 湖南长宏南雁锅炉修理安装有限公司 The refuse pyrolysis steam pot furnace system of high-efficiency environment friendly

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