CN210688198U - Opposite-impact type oil-fired boiler - Google Patents
Opposite-impact type oil-fired boiler Download PDFInfo
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- CN210688198U CN210688198U CN201921098979.5U CN201921098979U CN210688198U CN 210688198 U CN210688198 U CN 210688198U CN 201921098979 U CN201921098979 U CN 201921098979U CN 210688198 U CN210688198 U CN 210688198U
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Abstract
The utility model discloses a hedging type oil-fired boiler. The boiler is provided with a main combustion area, a reduction area and a burnout area from bottom to top in sequence, wherein rotational flow fuel oil burners are symmetrically arranged on shells on the front side and the rear side of the main combustion area, fuel oil pressure nozzles are symmetrically arranged on shells on the left side and the right side of the main combustion area, and burnout air nozzles are symmetrically arranged on shells on the front side and the rear side of the burnout area. The arrangement method of combustion in the furnace comprises the steps that part of fuel oil is fully mixed with air through a cyclone burner and then enters the furnace for combustion, and the other part of fuel oil directly enters the furnace through a pressure nozzle so as to be mixed with high-temperature flue gas in a hearth and be combusted. The side wall is provided with the pressure nozzles for fuel oil combustion, so that homogenization of combustion distribution in the main combustion area in the hearth is facilitated, mixing of part of fuel oil and secondary air is delayed by the side wall, staged combustion of fuel is realized, and NOx emission is further reduced. The utility model relates to a simply, the regulation is organized in the burning of being convenient for, and comprehensive running cost is low, reduces pollutant discharge, reduces the characteristics of energy consumption.
Description
Technical Field
The utility model relates to a boiler fuel combustion technology field, more specifically relate to a hedging type fuel oil boiler.
Background
With the development of socio-economy, the demand of human beings for energy is increasing. At present, in the fuel combustion research process, the problems of controlling energy conservation and emission reduction, reducing operation cost, improving combustion efficiency and the like become key problems which need to be solved and researched for a long time in all countries in the world. Due to the irreproducibility of fossil fuels such as coal, natural gas, petroleum and the like, the continuous increase of the price of the fuels, and a series of environmental problems caused by the emission of harmful substances, in order to relieve the energy crisis, reduce the environmental pollution and the sustainable development of the society, a novel combustion technology and the wide utilization of renewable energy sources are bound to replace the conventional combustion technology and energy sources.
The fuel used by industrial boilers in China is mainly coal, and due to the non-regenerability of coal and the environmental problems caused by the emission of solid particles, sulfides and nitrogen oxides, coal-fired boilers with lower energy levels are gradually replaced by coal-fired boilers with higher productivity or other fuels. The biomass fuel oil and part of heavy oil are used for replacing the traditional fuel, and the coal-fired boiler is reformed and arranged to a certain extent, so that the use and popularization of the biomass fuel oil are facilitated. Compared with the traditional fossil fuel, the biomass fuel oil has low sulfur content, so the emission of sulfide is low. And the use of liquid fuel as fuel also reduces the emission of solid particulates.
Meanwhile, with the increasingly strict environmental protection requirements on the pollutant emission of the coal-fired boiler, most of the coal-fired boilers adopt a low-nitrogen combustion technology and low-nitrogen combustion equipment so as to meet the environmental protection requirements. Low nitrogen combustion technology can also be used for oil-fired boilers. At present, oil-fired boilers in China are few in application and are mostly small-sized boilers with low heat production. Most industrial boilers are mainly fired coal, and the number and the capacity of the industrial boilers are large, so that the energy consumption is excessive and the environmental pollution is serious. How to fully utilize renewable energy sources such as biomass fuel oil and the like, improve the combustion efficiency and effectively reduce the emission becomes a research hotspot. Therefore, there is a need for designing a large industrial boiler suitable for renewable energy sources such as biomass fuel oil, and a simple and efficient combustion method is sought to realize clean and stable operation of the oil-fired boiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an offset type fuel oil boiler is applicable to fuel such as living beings fuel, heavy oil, is favorable to living beings fuel's use and popularization, and the development to renewable energy has important meaning. Compared with the traditional coal-fired boiler, the emission of sulfides and solid particles is greatly reduced, and the emission of NOx can be effectively reduced.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: the opposed firing type oil-fired boiler comprises a main combustion area, a reduction area and a burnout area, wherein the main combustion area, the reduction area and the burnout area are sequentially arranged from bottom to top, swirl oil-fired burners are symmetrically arranged on shells on the front side and the rear side of the main combustion area, fuel pressure nozzles are symmetrically arranged on shells on the left side and the right side of the main combustion area, and burnout air nozzles are symmetrically arranged on shells on the front side and the rear side of the burnout area.
Preferably, 12 swirl fuel oil burners are arranged on the front side wall and the rear side wall of the main combustion area and are arranged in a 3 x 4 matrix; 3 fuel oil pressure nozzles on the left side wall and the right side wall of the main combustion area are distributed linearly from top to bottom; the number of the burnout air nozzles on the shells on the front side and the rear side of the burnout zone is 6, and the burnout air nozzles are arranged in a 2 x 3 matrix. The arrangement and number of burners and nozzles can be varied according to the desired boiler grade.
Preferably, the main combustion zone is square, and the shell is a water-cooled wall.
Preferably, the lower end of the main combustion area is funnel-shaped.
Preferably, the fuel pressure nozzle is connected with a flow meter and a pressure meter.
Preferably, the burnout air nozzle is arranged 0.2 m-2 m away from the main combustion area, and the distance can be changed according to different required boiler grades.
A furnace combustion arrangement method of a hedging type oil-fired boiler comprises the following steps:
the method comprises the following steps: selecting biomass fuel oil or blend fuel oil of the biomass fuel oil and diesel oil as first standby oil, and selecting heavy oil as second standby oil;
step two: and heating the first spare oil and the second spare oil to 50-90 ℃ so as to improve the quality of fuel atomization and the initial energy of combustion in a hearth.
Step three: and fully mixing the first standby oil with air through rotational flow oil burners symmetrically arranged on the front wall and the rear wall of the main combustion area of the oil-fired boiler, and then feeding the mixture into a hearth for combustion. Meanwhile, the standby oil passes through a fuel pressure nozzle arranged on the side wall and directly enters the furnace, so that the standby oil is mixed with high-temperature flue gas in the hearth and is combusted.
Preferably, in the third step, the oil flow of the swirl oil burner and the oil flow of the oil pressure nozzle are adjusted in the same time, so that the total heating value of the fuel entering the hearth from the oil pressure nozzle is lower than 30% of the total heating value of the boiler fuel.
Preferably, in the third step, the entering direction and the total amount of the secondary air are adjusted through the ember air nozzle.
Preferably, the rotational flow fuel oil burner adopts an air fuel oil crushing method, high-pressure air is utilized to impact fuel oil, the fuel oil is atomized into small liquid drops and is fully mixed with air, and the small liquid drops and the air are fed into a hearth in a rotational flow mode; the fuel pressure nozzle adopts a method of crushing fuel under pressure, and fuel is atomized into small liquid drops from the nozzle to enter a hearth by improving oil pressure.
Compared with the prior art, the utility model has the following advantages:
(1) the renewable energy biomass fuel oil is used as the main fuel, so that the emission of sulfides and solid particles can be effectively reduced.
(2) The used fuel oil is heated to 50-90 ℃ so as to improve the atomization quality of the fuel oil and the initial energy of combustion of the hearth and improve the combustion efficiency.
(3) The first standby oil enters the hearth by a method of crushing fuel oil through air, and the second standby oil enters the hearth through the front side and the rear side of the main combustion area, so that fuel staged combustion is realized, and the emission of nitrogen oxides is further reduced.
(4) The fuel entering the hearth from the fuel pressure nozzle selects heavy oil to realize a multi-fuel combustion mode, can improve the temperature of the hearth and reduce the generation amount of nitrogen oxides in the furnace, and realizes rich oil combustion in a main combustion area by a pressure crushing method without air intervention.
(5) The secondary air is introduced into the burnout air nozzle above the main combustion area, so that the low-nitrogen combustion technology is realized, the emission of nitrogen oxides can be reduced, a large amount of CO is generated through the reduction area, micromolecule organic matters are generated through cracking, and secondary combustion is carried out in the burnout area.
(6) The utilization efficiency of the biomass fuel is improved, the application range of the biomass fuel is expanded, and the development of biomass energy is promoted.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the present invention will be briefly introduced below, and 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 a counter-flow oil-fired boiler according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for arranging the combustion in the boiler of the opposed-flow oil boiler according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the opposed firing oil boiler comprises a cyclone oil burner 1, an oil pressure nozzle 2, a burn-out air nozzle 3, a hearth 4, a main combustion zone 5, a reduction zone 6 and a burnout zone 7.
The cyclone fuel oil burners 1 are symmetrically arranged on the shells on the front side and the rear side of the main combustion area 5, and the number of the cyclone fuel oil burners 1 on the shells on the front side and the rear side of the main combustion area 5 is 12, and the 12 cyclone fuel oil burners are arranged in a 3 multiplied by 4 matrix.
The fuel pressure nozzles 2 are symmetrically arranged on the shells on the left side and the right side of the main combustion area 5, and the number of the fuel pressure nozzles 2 on the shells on the left side and the right side of the main combustion area 5 is 3, and the fuel pressure nozzles are linearly distributed from top to bottom;
the burnout air nozzles 3 are symmetrically arranged on the shells on the front side and the rear side of the burnout zone 7, and the number of the burnout air nozzles 3 on the shells on the front side and the rear side of the burnout zone 7 is 6, and the burnout air nozzles are arranged in a 2 x 3 matrix.
The main combustion area is square, the shell is a water-cooled wall, the main body of the hearth 4 is divided into a main combustion area 5, a reduction area 6 and a burnout area 7 which are sequentially arranged from bottom to top, and the lower end of the main combustion area 5 is funnel-shaped.
Specifically, the fuel pressure nozzle 2 is connected with a flow meter (not shown) and a pressure gauge (not shown) for controlling the fuel flow and the oil pressure.
Specifically, the distance between the installation of the burnout air nozzle 3 and the main combustion zone 5 is 0.2 m-2 m, so that unburned fuel oil in the reduction zone 6 is fully cracked into micromolecular organic matters at high temperature and generates a large amount of CO, and secondary combustion is carried out in the burnout zone 7.
As shown in fig. 2, a method for arranging combustion in a furnace of a hedging oil-fired boiler includes the steps of:
s1: selecting biomass fuel oil or blend fuel oil of the biomass fuel oil and diesel oil as first standby oil, and selecting heavy oil as second standby oil;
s2: heating both the first standby oil and the second standby oil to 50-90 ℃;
s3: fully mixing the standby oil I with air through rotational flow oil burners 1 symmetrically arranged on the front side and the rear side of a main combustion area 5 of the oil-fired boiler, and then feeding the mixture into a hearth 4 for combustion; the cyclone fuel oil burner 1 adopts an air fuel oil crushing method, utilizes high-pressure air to impact fuel oil, atomizes the fuel oil into small liquid drops, fully mixes the small liquid drops with air, and enters a hearth 4 in a cyclone mode. Meanwhile, the standby oil II directly enters the furnace through the fuel oil pressure nozzles 2 arranged on the left side and the right side of the main combustion area 5, so that the standby oil II is mixed with high-temperature flue gas in the hearth 4 and is combusted, the fuel oil pressure nozzles 2 adopt a method of crushing fuel oil under pressure, and the fuel oil is atomized into small liquid drops from the nozzles to enter the hearth 4 by improving oil pressure.
Specifically, in the same time, the swirl fuel burner 1 and the fuel pressure nozzle 2 are adjusted, so that the total heating value of the fuel entering the hearth 4 from the fuel pressure nozzle 2 is lower than 30% of the total heating value of the boiler fuel.
Specifically, the ember air nozzle 3 adjusts the entering direction and the total amount of secondary air.
Through the technical scheme, the utility model provides a pair of towards formula oil boiler gets into furnace 4 after 1 and the air intensive mixing of whirl fuel oil burner that most fuel was arranged through the front and back side and burns, and in another part fuel directly spouted into furnace 4 through the fuel pressure nozzle 2 that left and right sides was arranged, made its and the inside high temperature flue gas of furnace 4 mix and burn. The fuel pressure nozzles 2 are arranged on the left side and the right side for fuel combustion, so that the homogenization of the combustion distribution of the main combustion area 5 in the hearth 4 is facilitated, and the rich combustion of the main combustion area 5 is realized. And the fuel pressure nozzles 2 arranged on the left side and the right side provide fuel which delays combustion, and fuel fractional combustion is realized, so that the emission of nitrogen oxides is further reduced. The utility model relates to a simply, the regulation is organized in the burning of being convenient for, and comprehensive running cost is low, and combustion efficiency is high, and energy resource consumption is low, and renewable energy such as biomass fuel utilization ratio is high, and the gaseous pollutants discharges fewly.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The opposite-impact type fuel oil boiler is characterized by comprising a main combustion area, a reduction area and a burnout area which are sequentially arranged from bottom to top, wherein rotational flow fuel oil burners are symmetrically arranged on shells on the front side and the rear side of the main combustion area, fuel oil pressure nozzles are symmetrically arranged on shells on the left side and the right side of the main combustion area, and burnout air nozzles are symmetrically arranged on shells on the front side and the rear side of the burnout area.
2. The opposed-flow oil-fired boiler according to claim 1, wherein 12 swirl oil-fired burners are arranged on the front and rear side walls of the main combustion zone in a 3 x 4 matrix; 3 fuel oil pressure nozzles on the left side wall and the right side wall of the main combustion area are distributed linearly from top to bottom; the number of the burnout air nozzles on the shells on the front side and the rear side of the burnout zone is 6, and the burnout air nozzles are arranged in a 2 x 3 matrix.
3. The opposed-flow oil-fired boiler according to claim 1, wherein the main combustion zone is square and the shell is a water-cooled wall.
4. A opposed-flow oil-fired boiler according to claim 1, wherein the lower end of the main combustion zone is funnel-shaped.
5. A opposed fuel oil boiler in accordance with claim 1, wherein said fuel oil pressure nozzle is connected with a flow meter and a pressure gauge.
6. A opposed oil boiler according to claim 1, wherein said ember-burning air nozzle is installed at a distance of 0.2m to 2m from the main combustion zone, and the distance is varied according to the desired boiler class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921098979.5U CN210688198U (en) | 2019-07-12 | 2019-07-12 | Opposite-impact type oil-fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921098979.5U CN210688198U (en) | 2019-07-12 | 2019-07-12 | Opposite-impact type oil-fired boiler |
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| CN210688198U true CN210688198U (en) | 2020-06-05 |
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| CN201921098979.5U Active CN210688198U (en) | 2019-07-12 | 2019-07-12 | Opposite-impact type oil-fired boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274222A (en) * | 2019-07-12 | 2019-09-24 | 合肥工业大学智能制造技术研究院 | Burn method for arranging in a kind of opposite-flushing type oil burning boiler and its furnace |
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2019
- 2019-07-12 CN CN201921098979.5U patent/CN210688198U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274222A (en) * | 2019-07-12 | 2019-09-24 | 合肥工业大学智能制造技术研究院 | Burn method for arranging in a kind of opposite-flushing type oil burning boiler and its furnace |
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