阅读说明：本技术 燃烧系统以及锅炉 (Combustion system and boiler ) 是由 刘庆锋 蓝晓晨 游龙华 苏福彬 邓卫卫 谢明盛 兰佛荣 郭静远 林新彪 张继荣 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种燃烧系统以及锅炉,涉及烟草工业锅炉领域,用以优化燃烧系统的结构。该燃烧系统包括炉膛、燃烧器、第一燃料系统以及第二燃料系统。燃烧器安装于炉膛的入口处。第一燃料系统与燃烧器密封连接,且第一燃料系统与燃烧器或者炉膛可拆卸连接；第一燃料系统用于将待燃烧的燃油通入到燃烧器中。第二燃料系统与燃烧器密封连接,且第二燃料系统与燃烧器或者炉膛可拆卸连接；第二燃料系统用于将待燃烧的燃气通入到燃烧器中。其中,第一燃料系统和第二燃料系统择一处于使用状态。上述技术方案,保护了第一燃料系统的雾化器不被天然气燃烧生成的水蒸气腐蚀,使得炉头雾化器能够保持在较好的工作状态,且实现了油气两用切换并正常运行。(The invention discloses a combustion system and a boiler, relates to the field of boilers in the tobacco industry, and aims to optimize the structure of the combustion system. The combustion system comprises a furnace, a combustor, a first fuel system and a second fuel system. The burner is installed at the entrance of the furnace. The first fuel system is hermetically connected with the combustor, and the first fuel system is detachably connected with the combustor or the hearth; the first fuel system is used for introducing fuel oil to be combusted into the combustor. The second fuel system is hermetically connected with the combustor and detachably connected with the combustor or the hearth; the second fuel system is used for introducing fuel gas to be combusted into the combustor. Wherein the first fuel system and the second fuel system are alternatively in a use state. Above-mentioned technical scheme has protected first fuel system's atomizer not corroded by the vapor that natural gas burning generated for the furnace end atomizer can keep at better operating condition, and has realized that oil gas is dual-purpose to be switched and normal operating.)

1. A combustion system, comprising:

a hearth (1);

the burner (2) is arranged at the inlet of the hearth (1);

the first fuel system (3) is hermetically connected with the combustor (2), and the first fuel system (3) is detachably connected with the combustor (2) or the hearth (1); the first fuel system (3) is used for introducing fuel oil to be combusted into the combustor (2); and

the second fuel system (4) is hermetically connected with the combustor (2), and the second fuel system (4) is detachably connected with the combustor (2) or the hearth (1); the second fuel system (4) is used for introducing fuel gas to be combusted into the combustor (2);

wherein the first fuel system (3) and the second fuel system (4) are alternatively in use.

2. A combustion system according to claim 1, wherein the first fuel system (3) comprises:

a fuel delivery line (31) configured to deliver fuel;

an atomizer (32), an outlet of the fuel delivery line (31) being sealed and in communication with an inlet of the atomizer (32); the atomizer (32) is detachably mounted on the inner wall of the hearth (1) and is positioned at the upstream of the burner (2), and the outlet of the atomizer (32) is in sealed communication with the inlet of the burner (2);

an air delivery line (33) in sealed communication with an inlet of the atomizer (32); and

an ignition gas delivery duct (34), an outlet of the ignition gas delivery duct (34) extending into the interior of the furnace (1), and an outlet of the ignition gas delivery duct (34) being adjacent to an inlet of the burner (2).

3. The combustion system according to claim 2, wherein the second fuel system (4) comprises:

a protector (41) including a through hole (417); the protector (41) is detachably arranged on the inner wall of the hearth (1) and is positioned at the upstream of the combustor (2), and the outlet of the atomizer (32) is in sealed communication with the inlet of the combustor (2); the protector (41) is used for conveying primary air to the combustor (2); and

the outlet of the gas conveying pipeline (42) extends into the hearth (1), and the outlet of the gas conveying pipeline (42) is adjacent to the inlet of the combustor (2).

4. A combustion system according to claim 3, characterized in that the outer wall of the protector (41) is provided with a first connection location (411) and a second connection location (412);

the first connecting position (411) is connected with the inner wall of the hearth (1) through a hinge (413); and/or the second connecting position (412) is connected with the inner wall of the hearth (1) through a locking device (414).

5. The combustion system as claimed in claim 4, wherein the locking device (414) comprises a catch (415) and a locking member (416), the catch (415) being mounted to one of the protector (41) and the furnace (1), the locking member (416) being mounted to the other of the protector (41) and the furnace (1).

6. A combustion system according to claim 4, wherein the burner (2) is sealingly mounted to the inner wall of the furnace (1) by means of a fixed support (5), and the outer wall of the protector (41) is also removably and sealingly connected to the fixed support (5).

7. A combustion system according to claim 6, characterized in that said fixed support (5) is also provided with a sight hole (51) communicating the outside and inside of said furnace (1).

8. A combustion system according to claim 4, wherein the first connection location (411) and the second connection location (412) are arranged at intervals at an outer wall of the protector (41).

9. A combustion system according to claim 4, wherein the outer wall of the atomizer (32) is provided with a third connection location and a fourth connection location;

the third connecting position is connected with the inner wall of the hearth (1) through a hinge (413); and/or the fourth connecting position is connected with the inner wall of the hearth (1) through a locking device (414);

the third and first connection positions (411) are staggered, and the fourth and second connection positions (412) are staggered.

10. A boiler comprising the combustion system of any one of claims 1 to 9.

Technical Field

The invention relates to the field of boilers in the tobacco industry, in particular to a combustion system and a boiler.

Background

The oil-fired boiler comprises a hearth, a burner, a primary air pipe, an ignition air pipe, an atomizer and a secondary air pipe. The combustion process is as follows: and introducing the fuel into the atomizer, and atomizing the fuel into fuel spray by the atomizer. The atomized fuel oil is ignited and combusted together with acetylene gas and primary air which are conveyed by an ignition air pipe and used for ignition. After the combustion is stable, secondary air is conveyed through a secondary air pipe. The secondary air is used as combustion main air and is used for providing oxygen required by the combustion process of atomized fuel oil.

The inventor finds that at least the following problems exist in the prior art: the oil-fired boiler has low fuel efficiency and serious pollution.

Disclosure of Invention

The invention provides a combustion system and a boiler, which are used for optimizing the structure of the combustion system.

Some embodiments of the invention provide a combustion system comprising:

a hearth;

the burner is arranged at the inlet of the hearth;

the first fuel system is hermetically connected with the combustor and detachably connected with the combustor or the hearth; the first fuel system is used for introducing fuel oil to be combusted into the combustor; and

the second fuel system is hermetically connected with the combustor and detachably connected with the combustor or the hearth; the second fuel system is used for introducing fuel gas to be combusted into the combustor;

wherein the first fuel system and the second fuel system are alternatively in a use state.

In some embodiments, the first fuel system comprises:

a fuel delivery line configured to deliver fuel;

the outlet of the fuel oil conveying pipeline is sealed and communicated with the inlet of the atomizer; the atomizer is detachably mounted on the inner wall of the hearth and is positioned at the upstream of the burner, and the outlet of the atomizer is communicated with the inlet of the burner in a sealing manner;

the air conveying pipeline is communicated with the inlet of the atomizer in a sealing mode; and

an ignition gas delivery duct, an outlet of the ignition gas delivery duct extending into the furnace interior, and an outlet of the ignition gas delivery duct being adjacent to an inlet of the burner.

In some embodiments, the second fuel system comprises:

a protector including a through hole; the protector is detachably arranged on the inner wall of the hearth and is positioned at the upstream of the burner, and the outlet of the atomizer is communicated with the inlet of the burner in a sealing way; the protector is used for conveying primary air to the combustor; and

and the outlet of the gas conveying pipeline extends into the hearth, and is adjacent to the inlet of the combustor.

In some embodiments, the outer wall of the protector is provided with a first connection location and a second connection location;

the first connecting position is connected with the inner wall of the hearth through a hinge; and/or the second connecting position is connected with the inner wall of the hearth through a locking device.

In some embodiments, the locking device includes a clip mounted to one of the protector and the firebox, and a locking member mounted to the other of the protector and the firebox.

In some embodiments, the burner is hermetically mounted on the inner wall of the hearth through a fixed support, and the outer wall of the protector is also detachably and hermetically connected with the fixed support.

In some embodiments, the fixed support is further provided with a viewing hole communicating the outside and the inside of the hearth.

In some embodiments, the first connection location and the second connection location are spaced apart on an outer wall of the protector.

In some embodiments, the outer wall of the atomizer is provided with a third connection location and a fourth connection location;

the third connecting position is connected with the inner wall of the hearth through a hinge; and/or the fourth connecting position is connected with the inner wall of the hearth through a locking device;

the third connection position and the first connection position are staggered, and the fourth connection position and the second connection position are staggered.

The embodiment of the invention also provides a boiler comprising the combustion system provided by any technical scheme of the invention.

The combustion system provided by the technical scheme comprises a first fuel system and a second fuel system. Under the condition that the combustion system takes natural gas as fuel for a long time, the first fuel system can be separated from the working environment of the hearth so as to protect an atomizer of the first fuel system from being oxidized and corroded. When the boiler needs to use diesel oil as fuel during operation, only the first fuel system is in a use state, and the diesel oil can be switched to be combusted. Above-mentioned technical scheme has protected first fuel system's atomizer not caused the corruption influence by the vapor that natural gas burning generated for the furnace end atomizer can keep in the optimum, and has realized that oil gas is dual-purpose to be switched and normal operating.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic illustration of a combustion system provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a combustion system for combusting fuel according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a combustion system for combusting gaseous fuel according to an embodiment of the present invention;

FIG. 4 is a schematic view of a protector and a fixed support of a second fuel system of the combustion system according to an embodiment of the present invention;

FIG. 5 is a schematic front view of a protector of a second fuel system of the combustion system provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic side view of a protector of a second fuel system of the combustion system according to an embodiment of the present invention.

Detailed Description

The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 6.

Referring to fig. 1 to 3, an embodiment of the present invention provides a combustion system, which includes a furnace 1, a combustor 2, a first fuel system 3, and a second fuel system 4.

The combustion system mainly comprises a combustor 2, a fuel system and an air supply system. The fuel system is used to provide the fuel required by the burner 2. The fuel is divided into two types: gaseous fuel and oil fuel. The first fuel system 3 is used to supply fuel to the burner 2. The second fuel system 4 is used to provide a gaseous fuel, such as in particular natural gas, liquefied petroleum gas or the like, to the burner 2. The air supply system mainly provides main air required for combustion, and is also called secondary air in the field of combustion systems. The embodiments of the present invention do not relate to the improvement of the air supply system, and therefore, are not separately described. Specific implementations of the various components are described in detail below.

The furnace 1 is the main component of combustion. The furnace 1 has a cavity 11, and the subsequent combustion reaction is mainly completed in the cavity 11.

The burner 2 is installed at the entrance of the furnace 1. The burner 2 is a component for achieving ignition combustion, and specifically, an existing component may be used.

Referring to fig. 1 and 2, the first fuel system 3 is hermetically connected with the burner 2, and the first fuel system 3 is detachably connected with the burner 2 or the furnace 1; the first fuel system 3 serves to introduce fuel to be combusted into the burner 2.

The second fuel system 4 is hermetically connected with the combustor 2, and the second fuel system 4 is detachably connected with the combustor 2 or the hearth 1; the second fuel system 4 serves to introduce the gas to be combusted into the burner 2.

Wherein the first fuel system 3 and the second fuel system 4 are alternatively in use.

Specifically, when the first fuel system 3 is in a use state, the fuel oil is atomized after passing through the first fuel system 3, and then the primary air supply system of the first fuel system 3 and the ignition system cooperate to ignite and convey the atomized fuel oil to the combustor 2, and then convey the fuel oil to the furnace 1 for sufficient combustion. When the second fuel system 4 is in use, no separate ignition gas is required, nor is an atomizing device required, since the second fuel is a combustible gas. The ignition system is directly adopted to ignite the primary air conveyed by the second fuel system 4 and the combustible gas conveyed by the fuel gas conveying pipeline 42. After being ignited, the combustion objects enter the combustor 2 for combustion, and then enter the hearth 1 to be mixed with secondary air, so that full combustion is realized.

Referring to fig. 1-3, in some embodiments, first fuel system 3 includes a fuel delivery line 31, an atomizer 32, an air delivery line 33, and an ignition gas delivery line 34.

The fuel delivery line 31 is configured to deliver fuel. The fuel supply line 31 is, for example, a hose.

The atomizer 32 is detachably mounted on the inner wall of the furnace 1 and located at the upstream of the burner 2, and the outlet of the atomizer 32 is in sealed communication with the inlet of the burner 2.

The air delivery line 33 is in sealed communication with the inlet of the atomizer 32. The air supply line 33 is used to supply the primary air required for igniting the fuel.

The outlet of the ignition gas delivery pipe 34 extends into the interior of the furnace 1 and the outlet of the ignition gas delivery pipe 34 is adjacent to the inlet of the burner 2. The ignition gas supply line 34 supplies a combustible gas such as acetylene.

A specific implementation of the second fuel system 4 is described below.

Referring to fig. 1, 3-6, in some embodiments, the second fuel system 4 includes a protector 41 and a fuel gas delivery line 42.

Referring to fig. 1, 3 to 6, the protector 41 has substantially the same outer structure as the atomizer 32, and the protector 41 is sealingly connected to the inlet of the burner 2. The protector has a first through hole 417, and the through hole 417 is used to deliver primary air, i.e., auxiliary air, to aid ignition. The protector 41 is detachably arranged on the inner wall of the hearth 1 and is positioned at the upstream of the combustor 2, and the outlet of the atomizer 32 is in sealed communication with the inlet of the combustor 2; the protector 41 is used to deliver primary air to the burner 2.

The protector 41 is completely the same as the atomizer 32 in installation position, and the arrangement mode enables the combustion system to realize combustion of both fuel oil and gas fuel; on the other hand, when burning the gas fuel, the difference between the gas fuel and the fuel is sufficiently taken into consideration, so that the atomizer 32 having the atomizing function is not used, but only the protector 41 is used. The protector 41 fills a blank area formed by detaching the atomizer 32, not only realizes the sealing function, but also protects the atomizer 32 and also realizes the function of conveying primary air.

The outlet of the gas delivery line 42 extends into the interior of the furnace 1 and the outlet of the gas delivery line 42 is adjacent to the inlet of the burner 2.

Referring to fig. 1, a first fuel system 3 and a second fuel system 4 share a set of a burner 2 and a secondary air supply system. And the secondary air supply system is used for providing auxiliary air required by ignition. The air supply line 33 of the first fuel system 3 serves to supply secondary air required for the combustion of the fuel. The first fuel system 3 is used for delivering fuel oil, and a fuel oil delivery pipeline 31 is connected with an atomizer 32, and the fuel oil is pressurized and atomized by the atomizer 32 motor to enter the combustor 2 for combustion. The gas feed line 42 communicates directly with the burner 2. The through hole 417 of the protector 41 of the second fuel system 4 is used to convey secondary air required for combustion of the gas.

The combustion system has two modes of ignition: 1. with acetylene ignition when using fuel system mode. 2. Ignition with natural gas is used in gas system mode. Wherein, the ignition gas transmission pipeline 34 is connected with a natural gas ignition pipeline and enters the combustor 2 for ignition. The ignition mode is selected through a stop valve switch.

When acetylene is used for ignition, the primary air supply pipeline is communicated with the atomizer 32 to realize the delivery of auxiliary air. The ignition line is in direct communication with the atomizer 32 or in direct communication with a primary supply line near the outlet for providing oxygen for ignition. The overfire air supply duct provides the primary supply air for fuel combustion and the improvements herein are not relevant.

Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a combustion system for combusting fuel oil according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a combustion system for combusting gaseous fuel according to an embodiment of the present invention.

When the boiler uses diesel oil as a combustion medium, the atomizer 32 is in an installation and use state, and the protector 41 is in a disassembly state. The gas delivery line 42 in the control system diagram of fig. 1 is in a closed state; the fuel delivery line 31, the ignition gas delivery line 34, and the primary air delivery line are in an open state, and diesel oil is delivered to the atomizer 32 by an oil pump. At this time, the atomizer 32 in the burner 2 in fig. 2 operates to drive the atomizer 32 to rotate at a high speed, and diesel oil is atomized and sprayed into the burner 2 to be fully mixed with the primary air auxiliary air supply and the secondary air to realize high-efficiency combustion.

When the boiler uses natural gas as a combustion medium, the fuel oil conveying pipeline 31 in the control system diagram of fig. 1 is in a closed state, and the fuel gas conveying pipeline 42 and the air conveying pipeline 33 are in an open state. The atomizer 32 is now removed from the burner 2 of fig. 2, and the protector 41 is in the installed state. The protector 41 is used to assist in the supply of air, i.e., to deliver primary air.

Above-mentioned technical scheme has effectively solved among the prior art corrosion to atomizer 32 when gas burning. Because the content of hydrogen element in natural gas is higher than that of fuel such as coal, oil and the like, the water vapor content in the flue gas after combustion is higher, and especially when the boiler operates at low load, a large amount of water vapor is easily generated at the hearth 1 and the tail part of the boiler to form condensation, so that water is accumulated in a flue or a pressure element in the hearth 1 to cause corrosion. This characteristic of natural gas makes it more corrosive to the atomizer 32. If the atomizer 32 is not disassembled, the corrosion of the atomizer 32 affects the combustion efficiency of the boiler when the boiler operates by taking oil as a medium, and even affects the normal operation of the oil-fired boiler when the boiler operates seriously.

It can be seen that, above-mentioned technical scheme, under the boiler used the natural gas as the condition of combustion medium, the device can replace furnace end atomizer 32 and remain in boiler furnace 1, had both realized necessary supplementary air supply, can also protect the rotating part of boiler furnace end atomizer 32, protects the motor 35 who drives atomizer 32 promptly, avoids atomizer 32 to be in the natural gas combustion environment for a long time, alleviates the influence of oxidative corrosion to atomizer 32, extension atomizer 32 life.

Referring to fig. 3-6, in some embodiments, the outer wall of the protector 41 is provided with a first connection location 411 and a second connection location 412. The first connecting position 411 is connected with the inner wall of the hearth 1 through a hinge 413; and/or the second connecting position 412 is connected with the inner wall of the hearth 1 through a locking device 414.

The protector 41 is installed through two connecting positions, so that the protector 41 is more stable and reliable to install. The first connecting position 411 is connected by a hinge 413, so that the position of the protector 41 can be adjusted conveniently according to the field installation requirement. The second connecting position 412 adopts a locking device 414, so that the installation and fixation of the protector 41 can be effectively realized. Moreover, the two connection modes are convenient to disassemble and assemble.

In order to facilitate the installation of the burner 2, the protector 41 and other components, in some embodiments, the burner 2 is hermetically installed on the inner wall of the furnace 1 through the fixed support 5, and the outer wall of the protector 41 is also detachably and hermetically connected with the fixed support 5.

Referring to fig. 3 to 6, the fixed support 5 is a revolving body, and the fixed support 5 is clamped at the inlet of the furnace 1. The fixed support 5 comprises a step-shaped first through hole, and the combustor 2 is clamped on the inner wall of one end of the first through hole. The protector 41 and the atomizer 32 are both mounted on the end surface of the other end of the first through hole.

Referring to fig. 3-6, in some embodiments, the first connection location 411 and the second connection location 412 are spaced apart on an outer wall of the protector 41. This makes the protector 41 more securely mounted and more evenly stressed.

The outer wall of the atomizer 32 is provided with a third connection location not shown and a fourth connection location not shown. The third connecting position is connected with the inner wall of the hearth 1 through a hinge 413; and/or the fourth connecting position is connected with the inner wall of the hearth 1 through a locking device 414. The third connection position is offset from the first connection position 411, and the fourth connection position is offset from the second connection position 412.

The atomizer 32 is attached in a similar manner to the protector 41, with the hinge 413 in the third attachment position and the snap 415 in the fourth attachment position. The catch 415 comprises a cooperating projection and recess. One of the projection and the groove is mounted to the atomizer 32, and the other is mounted to the stationary support 5.

When the atomizer 32 is required to be used, both the third and fourth attachment positions are in the installed state. The first connecting position 411 of the protector 41 is in a connected state, and the second connecting position 412 of the protector 41 is in an open state, so that the protector 41 is in a suspended state under the action of its own gravity, and therefore the protector 41 avoids the installation position of the atomizer 32, so as to prevent the protector 41 from interfering with the normal installation of the atomizer 32.

When the protector 41 is required to be used, both the first connecting position 411 and the second connecting position 412 are in the mounted state. The third connection position of the atomizer 32 is in the connection state, and the fourth connection position of the atomizer 32 is in the open state, so that the atomizer 32 is in the suspension state under the action of its own gravity, and the atomizer 32 avoids the installation position of the protector 41, so that the atomizer 32 is prevented from interfering with the installation of the protector 41.

Specifically, the atomizer 32 is opened and closed in a left-opening structure, and in order to ensure that the original device does not need to be removed and used conveniently when the protector 41 and the original device are switched for use, the protector is designed in a right-opening and closing structure to avoid interference.

It can be seen that, in the protector 41 provided in the embodiment of the present invention, the main structure of the protector 41 maintains the original hollow structure of the atomizer 32, so as to achieve connection with both the air duct and the burner 2. The protector 41 is different from the atomizer 32 in that the atomizer 32 is connected to the motor 35 through a bearing to drive the atomizer 32 to rotate, and the protector 41 is of a fixed structure and does not need to rotate. The protector 41 mainly functions to replace the original furnace end atomizer 32 to seal the hearth 1 when natural gas is combusted, protect the furnace end atomizer 32, and simultaneously realize auxiliary air supply.

When the boiler operates and burns by taking natural gas as fuel, the original furnace end atomizer 32 is withdrawn from the hearth 1, the device provided by the embodiment of the invention is pushed into the hearth 1 and locked to replace the original furnace end atomizer 32 to seal the hearth 1, the natural gas boiler normally operates, meanwhile, the original atomizer 32 is not in the combustion environment of the hearth 1, the oxidation corrosion is slowed down, and the service life of the atomizer 32 is prolonged.

It should be noted that, since the fluid transportation is mainly achieved, a hermetic connection is adopted at the connection of the related components, so as to reduce or even avoid leakage.

Referring to fig. 3, in some embodiments, the fixed support 5 is further provided with a viewing hole 51 communicating the outside and the inside of the furnace 1 so as to facilitate viewing of the combustion conditions inside the furnace.

The embodiment of the invention also provides a boiler comprising the combustion system provided by any technical scheme of the invention.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.