CN209909870U - Steam boiler for burning biomass gas - Google Patents
Steam boiler for burning biomass gas Download PDFInfo
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- CN209909870U CN209909870U CN201920287025.2U CN201920287025U CN209909870U CN 209909870 U CN209909870 U CN 209909870U CN 201920287025 U CN201920287025 U CN 201920287025U CN 209909870 U CN209909870 U CN 209909870U
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Abstract
The utility model discloses a steam boiler burning biomass gas, which comprises a boiler body and a combustion chamber which are respectively arranged up and down, wherein the boiler body comprises a smoke exhaust channel communicated with the combustion chamber and a boiler barrel used for containing water, and the smoke exhaust channel is provided with a smoke exhaust port; the boiler barrel is positioned on the upper side and the lower side of the smoke exhaust channel, a plurality of water-cooled wall tubes communicated with the boiler barrel are distributed in the smoke exhaust channel, and a steam outlet is arranged on the upper boiler barrel; a biomass gas burner is installed at the gas inlet end of the combustion chamber; and a secondary air interface is arranged in the combustion chamber close to the joint of the combustion chamber and the smoke exhaust channel. The utility model provides a steam boiler that fires living beings gas, its thermal efficiency is high, clean environmental protection and pollution discharge are extremely low.
Description
Technical Field
The utility model relates to a steam boiler field especially relates to a steam boiler that fires living beings gas.
Background
The steam boiler is an energy conversion device, the energy input to the steam boiler is in the forms of chemical energy, electric energy, heat energy of high-temperature flue gas and the like in fuel, and the steam boiler converts the energy and outputs a steam carrier with certain heat energy to the outside.
Under the background that the national environmental protection policy is more and more strict, the environmental protection emission standard is gradually improved, the traditional industrial boiler taking coal, fuel oil and the like as fuels is difficult to reach the environmental protection emission requirement of the national upgrading, on one hand, the energy cost of the steam boiler taking natural gas as the fuel is multiplied, enterprises are difficult to bear, on the other hand, the natural gas is not supplied nearby at the position of some enterprises, and the natural gas boiler cannot be used. Other viable clean, environmentally friendly energy sources have to be sought, and biomass energy naturally becomes an accepted viable alternative. The main raw material sources of the biomass energy are agricultural and forestry wastes, furniture building material wastes and building template wastes, and the biomass energy can not be directly combusted according to the latest environmental protection standard requirements, or processed into biomass molding particles, or converted into combustible biomass gas by adopting a gasification technology to serve as fuel for an industrial boiler.
The biomass gas is used as clean energy, is used as industrial boiler fuel, has the environment-friendly emission standard equal to that of a natural gas boiler, and only needs to adopt a specially designed gas boiler to combust the biomass gas, SO that the blackness, dust and SO discharged by boiler flue gas2Indexes such as NOx can completely reach the same cleanness degree of natural gas. Especially, the user with larger energy load adopts the combined technology of 'biomass gasification furnace and biomass gas boiler', firstly biomass gas is generated by the gasification furnace and then is sent to the boiler to be used as fuel, the energy cost of the combined operation is far lower than that of natural gas, even is much lower than that of biomass particles, and the environmental-friendly emission is much better than that of an industrial boiler using the biomass particles as fuel.
The common gas boiler is designed by taking natural gas with high heat value as fuel, is used for burning biomass gas, firstly, the output power is reduced greatly, the heat efficiency of the boiler is lower, the biomass gas has low heat value and only has 1/8-1/6 of the natural gas, the biomass gas is difficult to burn out due to poor air distribution, and the stability is poorer when the heat load is lower. Therefore, the boiler must be specially designed according to the data of the composition, combustion characteristics and the like of the biomass gas to ensure high combustion thermal efficiency, clean combustion and clean emission.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a steam boiler of burning living beings gas that thermal efficiency is high, clean environmental protection and pollution discharge are minimum.
In order to achieve the purpose, the utility model provides a steam boiler burning biomass gas, which comprises a boiler body and a combustion chamber which are respectively arranged up and down, wherein the boiler body comprises a smoke exhaust channel communicated with the combustion chamber and a boiler barrel used for containing water, and the smoke exhaust channel is provided with a smoke exhaust port; the boiler barrel is positioned at the upper side and the lower side of the smoke exhaust channel, a large number of water-cooled wall tubes communicated with the boiler barrel are distributed in the smoke exhaust channel, and a steam outlet is arranged on the upper boiler barrel; a biomass gas burner is installed at the gas inlet end of the combustion chamber; the side wall of the rear part of the combustion chamber is provided with a secondary air interface.
As a further improvement of the utility model, the water wall tube is arranged on the side wall of the smoke exhaust channel.
As a further improvement of the utility model, the drum comprises a first drum and a second drum, and the two ends of the water wall pipe are respectively communicated with the first drum and the second drum.
As a further improvement of the utility model, the second boiler barrel, the smoke exhaust channel, the first boiler barrel and the combustion chamber are arranged from top to bottom in sequence, and the steam outlet is positioned on the second boiler barrel.
As a further improvement, the combustor and the smoke exhaust channel are both of a strip structure, and the combustor and the smoke exhaust channel on the combustor are communicated with each other through the smoke exhaust port at the tail end.
As a further improvement, the inside of the smoke exhaust channel is provided with at least one smoke baffle wall, one side edge of the smoke baffle wall is connected with one of the inner walls of the smoke exhaust channel, and the other side edge of the smoke baffle wall is connected with the inner wall of the other side of the smoke exhaust channel by a distance and forms a bending part of the smoke exhaust channel.
As a further improvement, the quantity of keeping off the cigarette wall is at least two, the quantity of flue gas passageway kink corresponds with the quantity of keeping off the cigarette wall, and flue gas passageway kink is along smoke exhaust passage's extending direction staggered arrangement.
As a further improvement of the utility model, a furnace temperature and pressure measuring point interface is arranged on the side wall of the combustion chamber.
As a further improvement of the utility model, the side wall of the combustion chamber is provided with an explosion door, a fire hole and an access door; the side wall of the combustion chamber and the lower part of the side wall of the boiler body are both provided with ash removing doors.
As a further improvement, the heat-insulating combustion chamber is poured by heat-insulating refractory materials, and comprises a steel frame and heat-insulating refractory materials coated in the steel frame.
Advantageous effects
Compared with the prior art, the utility model discloses a steam boiler that fires biomass gas's advantage does:
1. because the biomass gas is used as fuel in the steam boiler for burning the biomass gas, the heat value of the biomass gas is low, and the consumption of the generated heat fuel gas with the same quantity is 6-8 times that of natural gas, so that the low-heat-value combustible gas such as the biomass gas can be fully combusted only by a large enough combustion chamber space. The biomass gas and the air are mixed in the combustor and then enter the combustion chamber for combustion, and the air mixed for the first time is not enough to enable the biomass gas to be completely combusted. And the secondary air interface near the joint of the combustion chamber and the smoke exhaust channel supplements air, so that the biomass gas and the air in the combustion chamber are mixed for the second time, oxygen can be further supplemented, the biomass gas is fully combusted and burned out, and the energy of the biomass gas can be utilized to the maximum extent. In addition, a plurality of water wall tubes communicated with the boiler barrel extend into the smoke exhaust channel, the contact area of the water wall tubes and the smoke is large, and more heat can be absorbed by water in the water wall tubes. The boiler efficiency of the steam boiler burning biomass gas can reach 91.6%.
2. The two ends of the water wall tube are respectively communicated with the first boiler barrel and the second boiler barrel, so that more water can be contained, and the water wall tube has the advantages of strong heat storage capacity, large heat exchange area, strong load regulation capacity and quick adaptation to load change. In addition, the first boiler barrel and the second boiler barrel are respectively arranged on the upper side and the lower side of the smoke exhaust channel, and under the condition of the same boiler volume, the occupied area is small due to the fact that the boiler volume is dispersed.
3. Because the combustion chamber and the smoke exhaust channel both adopt a strip structure, the combustor and the smoke exhaust port are both far away from the communication position of the combustion chamber and the smoke exhaust channel, and the combustion chamber adopts an elongated single-pass arrangement structure, so that sufficient retention time of the biomass gas in the combustion chamber is ensured, and the biomass gas is fully combusted.
4. The steam boiler burning biomass gas adopts the adiabatic hearth technology to design a boiler combustion chamber, the combustion chamber is an adiabatic combustion chamber poured by heat-insulating refractory materials, a combustion chamber steel frame is processed and assembled in a factory, and the furnace wall of the combustion chamber is built and poured on site.
5. The steam boiler for burning the biomass gas adopts a structure type of separating a boiler and a furnace, a combustion chamber as a part of the boiler is arranged at the lower part, and a boiler body as a part of the boiler is arranged at the upper part, so that the structure type has the advantages that: 1) No water wall pipes and the like exchange heat around the combustion chamber, so that the combustion control is convenient, and the combustion chamber can be ensured to be always kept at a higher temperature; 2) the boiler body as the part of the boiler can be prefabricated and integrally assembled in a factory, so that the manufacturing quality is ensured; 3) The combustion chamber adopts the extension single-pass arrangement, has reduced height width size, and the combustion chamber steelframe can be prefabricated in the mill and assembled, ensures manufacturing quality, and the whole dress is transported to on-the-spot masonry pouring furnace wall, easy to assemble.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of a biomass gas-fired steam boiler;
fig. 2 is a sectional view taken along the line a-a in fig. 1.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings.
Examples
The utility model discloses a specific embodiment is as shown in fig. 1 to fig. 2, a steam boiler that fires biomass gas, including boiler body 2 and the combustion chamber 1 of arranging about respectively, boiler body 2 includes with the exhaust fume channel 13 of 1 intercommunication of combustion chamber and the boiler barrel that is used for adorning water, is equipped with exhaust port 14 on the exhaust fume channel 13, and exhaust port 14 establishes on 2 front end side wall upper portions of boiler body. The boiler barrel is positioned at the upper side and the lower side of the smoke exhaust channel 13, a large number of water wall tubes 15 communicated with the boiler barrel are arranged in the smoke exhaust channel 13, and a steam outlet 6 is arranged on the upper boiler barrel. The gas inlet end of the combustion chamber 1 is provided with a combustor 3 of biomass gas, and the combustor 3 is positioned on the front end furnace wall of the boiler combustion chamber 1. The secondary air interface 12 is arranged in the combustion chamber 1 near the connection part with the smoke exhaust channel 13, namely the rear side wall of the combustion chamber 1.
The drum comprises a first drum 4 and a second drum 5, and two ends of the water wall tube 15 are respectively communicated with the first drum 4 and the second drum 5. In this embodiment, the first drum 4 is a lower drum, the second drum 5 is an upper drum, the second drum 5, the smoke exhaust channel 13, the first drum 4 and the combustion chamber 1 are sequentially arranged from top to bottom, and the steam outlet 6 is located at the top of the second drum 5. The upper end and the lower end of the water wall tube 15 are respectively communicated with the first boiler barrel 4 and the second boiler barrel 5.
The combustion chamber 1 and the smoke exhaust channel 13 both adopt a strip structure, and the combustion engine 3 on the combustion chamber 1 and the smoke exhaust port 14 at the tail end of the smoke exhaust channel 13 are both far away from the communication part of the combustion chamber 1 and the smoke exhaust channel 13.
At least one smoke baffle wall 16 is arranged in the smoke exhaust channel 13, one side edge of the smoke baffle wall 16 is connected with one inner wall of the smoke exhaust channel 13, and the other side edge of the smoke baffle wall is spaced from the inner wall of the other side of the smoke exhaust channel 13 to form a smoke channel bending part. The number of the smoke blocking walls 16 is at least two, the number of the bending parts of the smoke channel corresponds to the number of the smoke blocking walls 16, and the bending parts of the smoke channel are arranged in a staggered mode along the extending direction of the smoke exhaust channel 13. In this embodiment, the number of the smoke barrier walls 16 is four. The waterwall tubes 15 are distributed on the side walls of the flue gas channel 13 and the flue gas blocking walls 16, and are also concentrated in the middle of the aisle of the flue gas channel 13 between the second to fourth flue gas blocking walls 16 in the flow direction of flue gas.
The side wall of the combustion chamber 1 is provided with a furnace temperature and pressure measuring point interface 11 which can be used for installing a furnace temperature and pressure probe.
The side wall of the combustion chamber 1 is provided with an explosion door 8, a fire hole 7 and an access door 9. The side wall of the combustion chamber 1 and the lower part of the side wall of the boiler body 2 are provided with ash cleaning doors 10. The ash-removing door 10 is convenient for periodically removing the ash in the smoke exhaust channel 13. The combustion chamber 1 is a heat insulation combustion chamber poured by heat insulation refractory materials and comprises a steel frame and heat insulation refractory materials coated in the steel frame.
When the steam boiler burning biomass gas is in operation, the biomass gas is injected into the combustion chamber 1 through the combustor 3. The burner 3 may be of the same construction as a natural gas burner. The biomass gas combustor 3 is internally divided into a gas channel and an air channel, gas enters the combustion chamber 1 to be immediately ignited and combusted to form rotary flame, and the cyclone disc of the combustor enables biomass gas and oxygen to be uniformly mixed and contacted as much as possible so as to ensure that combustible gas is fully combusted. The furnace space is large enough to accommodate as much complete combustion of the gas as possible. The length-width ratio of the combustion chamber 1 of the steam boiler is coordinated, so that the flame fullness is high when biomass gas is combusted, the temperature field distribution of the combustion chamber is uniform, and the high and stable temperature of the combustion chamber 1 can be ensured.
The steam boiler burning biomass gas adopts a structure mode of separating a boiler from a furnace. The combustion chamber 1 as the part of the furnace is arranged at the lower part, and the boiler body 2 as the part of the pot is arranged at the upper part, so the structure mode has the advantages that: 1) no water wall pipes and the like exchange heat around the combustion chamber 1, so that combustion control is facilitated, and the combustion chamber 1 can be ensured to be kept at a high temperature all the time; 2) the boiler body 2 as the part of the 'boiler' can be prefabricated and integrally assembled in a factory, so that the manufacturing quality is ensured; 3) the combustion chamber 1 is arranged in an elongated single way, so that the height and width are reduced, the combustion chamber steel frame can be processed and assembled in a factory, the manufacturing quality is ensured, and the combustion chamber steel frame is transported in a whole way to a cast furnace wall in a building site, so that the combustion chamber steel frame is convenient to install; 4) The structural style of the boiler body is that the double-boiler barrel is respectively arranged on the upper side and the lower side of the smoke exhaust channel 13 and is communicated through the water wall pipes 15 positioned on the left side and the right side, the manufacturing difficulty and the construction and installation difficulty of the boiler body are low, and the construction and installation workload is also reduced by the integrally-installed structure.
The boiler efficiency of the steam boiler using the biomass gas can reach 91.6 percent. O of smoke outlet2At a content of 7.28%, the content of CO was 0.1296%, CO27.68% of NO, 29ppm of SO2The content was 0 ppm.
The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above-disclosed embodiments, and various modifications, equivalent combinations, which are made according to the essence of the present invention, should be covered.
Claims (10)
1. A steam boiler burning biomass gas comprises a boiler body (2) and a combustion chamber (1) which are respectively arranged up and down, and is characterized in that the boiler body (2) comprises a smoke exhaust channel (13) communicated with the combustion chamber (1) and a boiler barrel used for containing water, and the smoke exhaust channel (13) is provided with a smoke exhaust port (14); the boiler barrel is positioned at the upper side and the lower side of the smoke exhaust channel (13), a large number of water-cooled wall pipes (15) communicated with the boiler barrel at the upper side and the lower side are distributed in the smoke exhaust channel (13), and a steam outlet (6) is arranged on the boiler barrel at the upper side; a biomass gas burner (3) is arranged at the gas inlet end of the combustion chamber (1); the side wall of the rear part of the combustion chamber (1) is provided with a secondary air interface (12).
2. A biomass-fired steam boiler according to claim 1, characterized in that the water wall tubes (15) are arranged on the side walls of the flue gas channel (13).
3. A biomass-fired steam boiler according to claim 2, characterized in that the drum comprises a first drum (4) and a second drum (5), and the water wall tubes (15) are connected at both ends to the first drum (4) and the second drum (5), respectively.
4. A biomass-fired steam boiler according to claim 3, characterized in that the second drum (5), the flue gas channel (13), the first drum (4) and the combustion chamber (1) are arranged in sequence from top to bottom, and the steam outlet (6) is located on the second drum (5).
5. A biomass-fired steam boiler according to claim 1 or 4, characterized in that the combustion chamber (1) and the flue gas channel (13) are of a strip-shaped structure, and the burner (3) of the combustion chamber (1) and the smoke outlet (14) at the end of the flue gas channel (13) are far away from the communication between the combustion chamber (1) and the flue gas channel (13).
6. A biomass-fired steam boiler according to claim 5, characterized in that at least one baffle wall (16) is arranged in the flue gas channel (13), one side edge of the baffle wall (16) is connected to one of the inner walls of the flue gas channel (13), and the other side edge is spaced from the inner wall of the other side of the flue gas channel (13) and forms a flue gas channel bend.
7. A biomass-fired steam boiler according to claim 6, characterized in that the number of the flue gas baffle walls (16) is at least two, the number of flue gas channel bends corresponding to the number of the flue gas baffle walls (16), the flue gas channel bends being staggered along the extension of the flue gas channel (13).
8. A biomass-fired steam boiler according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that the side wall of the combustion chamber (1) is provided with a furnace temperature and pressure measuring point interface (11).
9. A biomass-fired steam boiler according to claim 8, characterized in that the side walls of the combustion chamber (1) are provided with explosion doors (8), observation holes (7) and access doors (9); the side walls of the combustion chamber (1) and the lower part of the side wall of the boiler body (2) are provided with ash cleaning doors (10).
10. A biomass-fired steam boiler according to claim 1 or 9, wherein the combustion chamber (1) is a heat-insulating combustion chamber cast with heat-insulating refractory material, comprising a steel frame and heat-insulating refractory material encased in the steel frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287025.2U CN209909870U (en) | 2019-03-07 | 2019-03-07 | Steam boiler for burning biomass gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920287025.2U CN209909870U (en) | 2019-03-07 | 2019-03-07 | Steam boiler for burning biomass gas |
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| CN209909870U true CN209909870U (en) | 2020-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737370A (en) * | 2019-03-07 | 2019-05-10 | 广州海诚能源科技有限公司 | A kind of steam boiler of biomass-burning gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737370A (en) * | 2019-03-07 | 2019-05-10 | 广州海诚能源科技有限公司 | A kind of steam boiler of biomass-burning gas |
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Address after: 814 Tianan science and technology development building, Panyu energy saving science and Technology Park, 555 Panyu Avenue North, Panyu District, Guangzhou, Guangdong 511400 Patentee after: Guangzhou Haicheng Energy Technology Co.,Ltd. Address before: 814 Tianan science and technology development building, Panyu energy saving science and Technology Park, 555 Panyu Avenue North, Panyu District, Guangzhou, Guangdong 511400 Patentee before: GUANGZHOU HAICHENG ENERGY TECHNOLOGY Co.,Ltd. |