CN111336514B

CN111336514B - Heating furnace capable of burning two kinds of gas simultaneously

Info

Publication number: CN111336514B
Application number: CN202010179174.4A
Authority: CN
Inventors: 李坦
Original assignee: Wuhan Nengwang Technology Co ltd
Current assignee: Wuhan Nengwang Technology Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2022-04-19
Anticipated expiration: 2040-03-13
Also published as: CN111336514A

Abstract

The invention discloses a heating furnace capable of simultaneously burning two kinds of coal gas, which comprises a furnace body and a combustion device, wherein the furnace body comprises a combustion chamber, a radiation chamber and a convection chamber which are sequentially communicated from bottom to top, the combustion device comprises a flame spraying pipeline, and a flame spraying channel is horizontally arranged in the combustion chamber in an extending mode, so that when the combustion device works, heat generated by combustion firstly extends horizontally and then upwards to be sequentially transmitted to the radiation chamber and the convection chamber.

Description

Heating furnace capable of burning two kinds of gas simultaneously

Technical Field

The invention belongs to the field of industrial equipment, and particularly relates to a heating furnace capable of combusting two kinds of gas simultaneously.

Background

The heating furnace is a large heating device commonly used in the fields of coking, coal chemical industry and petrochemical industry, provides a required heat source for oil distillation, and is also a key device and a large energy consumption user in a production section. The heating furnace usually uses coal gas as fuel, through combustion heat release, the chemical energy of the coal gas is converted into heat energy, the heat energy is transferred to the oil medium flowing into the heating furnace, and the oil leaves the heating furnace after being heated to reach the process required temperature and enters the back-end process. The fuel gas commonly used by the heating furnace of the coking and coal chemical industry enterprises is coke oven gas, which has higher heat value and is a high-quality fuel or a raw material of other working procedures. In the steel and iron combined coking plant, a large amount of blast furnace gas also exists; in carbon black production plants, there is a large amount of carbon black tail gas. The two common fuel gases have low heat value but large yield and are important energy media. When the heating furnace burns coke oven gas for heat supply, a factory also needs to be capable of fully utilizing blast furnace gas or carbon black tail gas so as to save the coke oven gas and achieve the purposes of energy conservation, emission reduction and full utilization of heat energy. In some tar deep processing enterprises, process gas also exists, and is fuel gas which can be combusted to supply heat and can be combusted and utilized. When the load of the heating furnace is fixed, the flame generated by burning the blast furnace gas or the carbon black tail gas is larger than the flame of the coke oven gas (the height is higher and the diameter is larger), the larger diameter is easy to cause the flame to lick the inner pipeline of the furnace, and the higher height is easy to cause the flame to impact the safety of the critical equipment, so that the heating furnace capable of burning multiple gases simultaneously is provided, and the problem to be solved by the technical personnel in the field is solved urgently.

Disclosure of Invention

The invention mainly aims to provide a heating furnace capable of combusting two kinds of gas simultaneously, and aims to solve the problem that flame impacts the top when the two kinds of gas are combusted simultaneously in the traditional heating furnace.

In order to achieve the above object, the present invention provides a heating furnace capable of burning two kinds of gas simultaneously, comprising:

burner, burner includes the flame path way, flame path way horizontal extension is located in the combustion chamber, so that burner during operation, the heat that the burning produced is earlier along the level to extending the back, upwards extends in order to transfer in proper order to the radiation cavity with the convection current cavity.

Optionally, the combustion device is provided with a plurality of flame spraying pipelines, and the flame spraying pipelines of the plurality of combustion devices are dispersedly arranged in the combustion chamber.

Optionally, the number of the combustion devices is four, and the fire spraying pipes of the four combustion devices are arranged at intervals along the circumferential direction of the combustion chamber.

Optionally, the heating furnace capable of combusting two kinds of gas simultaneously further comprises a first gas conveying device and a second gas conveying device, wherein the first gas conveying device and the second gas conveying device are used for conveying a first gas and a second gas respectively;

the combustion device further comprises two conveying pipelines, one ends of the two conveying pipelines are respectively communicated with the first fuel gas conveying device and the second fuel gas conveying device, and the other ends of the two conveying pipelines are communicated with the flaming pipeline so as to convey the first fuel gas and/or the second fuel gas to the flaming pipeline.

Optionally, the heating furnace capable of combusting two kinds of gas simultaneously further comprises a gas leakage alarm device, and the gas leakage alarm device is externally arranged at the communication position of the first gas conveying device and the second gas conveying device with the gas pipeline.

Optionally, the combustion apparatus further includes an air duct, an outlet end of the air duct communicates with the flaming duct, so that air enters the combustion chamber through the flaming duct.

Optionally, the flaming conduit comprises two branch conduits in parallel;

the combustion device further comprises a first regulating valve and a second regulating valve, wherein the first regulating valve and the second regulating valve are respectively arranged on the two branch pipelines so as to regulate the flow of the two branch pipelines to be different.

Optionally, the convection chamber has a height greater than one fifth of the height of the furnace body and less than one third of the height of the furnace body.

Optionally, the furnace body still includes the radiation post, the radiation post corresponds to locate the mouth of pipe department of flame projecting pipeline, the radiation post is located the bottom of combustion chamber, and upwards extends to the radiation chamber.

Optionally, the width of the combustion chamber is less than the width of the radiation chamber.

According to the technical scheme, the heating furnace comprises a furnace body and a combustion device, the furnace body comprises a combustion chamber, a radiation chamber and a convection chamber which are sequentially communicated from bottom to top, the combustion device comprises a flame spraying pipeline, and the flame spraying channel is horizontally arranged in the combustion chamber in an extending mode, so that when the combustion device works, heat generated by combustion firstly extends horizontally and then upwards to be sequentially transferred to the radiation chamber and the convection chamber.

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 the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a heating furnace capable of burning two gases simultaneously according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a conventional heating furnace.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The heating furnace is a large heating device commonly used in the fields of coking, coal chemical industry and petrochemical industry, provides a required heat source for oil distillation, and is also a key device and a large energy consumption user in a production section. The heating furnace usually uses coal gas as fuel, through combustion heat release, the chemical energy of the coal gas is converted into heat energy, the heat energy is transferred to the oil medium flowing into the heating furnace, and the oil leaves the heating furnace after being heated to reach the process required temperature and enters the back-end process. The fuel gas commonly used by the heating furnace of the coking and coal chemical industry enterprises is coke oven gas, which has higher heat value and is a high-quality fuel or a raw material of other working procedures. In the steel and iron combined coking plant, a large amount of blast furnace gas also exists; in carbon black production plants, there is a large amount of carbon black tail gas. The two common fuel gases have low heat value but large yield and are important energy media. When the heating furnace burns coke oven gas for heat supply, a factory also needs to be capable of fully utilizing blast furnace gas or carbon black tail gas so as to save the coke oven gas and achieve the purposes of energy conservation, emission reduction and full utilization of heat energy. In some tar deep processing enterprises, process gas also exists, and is fuel gas which can be combusted to supply heat and can be combusted and utilized. When the heating furnace is loaded for a certain time, the flame generated by burning the blast furnace gas or the carbon black tail gas is larger than the flame of the coke oven gas (the height is higher and the diameter is larger), the larger diameter is easy to cause the flame to lick the pipeline in the furnace, and the higher height is easy to cause the flame to rush to the safety of the critical equipment.

In view of this, the present invention provides a heating furnace capable of combusting two gases simultaneously, and fig. 1 is a schematic perspective view of a heating furnace capable of combusting two gases simultaneously according to an embodiment of the present invention; fig. 2 is a schematic perspective view of a conventional heating furnace.

Referring to fig. 1 to 2, the heating furnace capable of simultaneously burning two kinds of gas includes a furnace body and a combustion device 40, wherein the furnace body includes a combustion chamber 10, a radiation chamber 20 and a convection chamber 30 which are sequentially communicated from bottom to top; burner 40 includes the flame spray pipeline, flame spray passageway horizontal extension is located in the combustion chamber 10, so that burner 40 during operation, the heat that the burning produced is earlier along the level to extending the back, upwards extend in order to transmit in proper order the radiation chamber 20 with convection chamber 30, so set up, will install the burner 240 who upwards takes place the traditional heating furnace of flame in the bottom, change to horizontal direction emission flame, with flame gathering in combustion chamber 10 to the problem that flame rushes to the top has been avoided. It should be noted that the combustion apparatus 40 may be installed at any position of the furnace body, and it is only necessary that the flame-ejecting passage of the combustion apparatus 40 extends horizontally in the combustion chamber 10, that is, the combustion apparatus 40 ejects flames in the combustion chamber 10 along a horizontal direction. Also, as shown in fig. 2, the combustion chamber 210 of the conventional heating furnace and the radiation chamber 220 of the conventional heating furnace are both integrated, and in the present application, they are distinguished by concentrating the flame mainly in the combustion chamber 10, thereby further preventing the problem of flame topping.

Further, in order to increase the heating capacity of the heating furnace and prevent the low heat value fuel gas from extinguishing and misfiring in the combustion process, the combustion device 40 is provided with a plurality of flame injection pipelines of the combustion device 40 which are dispersedly distributed in the combustion chamber 10, and a plurality of the combustion device 40 injects flame simultaneously, so that the heating capacity of the heating furnace can be increased, and the plurality of flame injection pipelines of the combustion device 40 form a closed loop, so that the problem that the low heat value fuel gas is extinguished and misfiring in the combustion process can be effectively prevented. Furthermore, the number of the combustion devices 40 is four, the four flame spraying pipelines of the combustion devices 40 are arranged along the circumferential direction of the combustion chamber 10 at intervals, so that the flame sprayed by the flame spraying pipelines of the four combustion devices 40 can form a closed loop in the combustion chamber 10 and influence each other, and therefore the problems of flameout and misfire of low-calorific-value fuel gas in the combustion process are solved.

In order to simultaneously combust two kinds of gas, the heating furnace 100 capable of simultaneously combusting two kinds of gas further comprises a first gas delivery device and a second gas delivery device, wherein the first gas delivery device and the second gas delivery device are used for respectively generating a first gas and a second gas; the combustion device 40 further comprises two conveying pipelines, one ends of the two conveying pipelines are respectively communicated with the first fuel gas conveying device and the second fuel gas conveying device, and the other ends of the two conveying pipelines are respectively communicated with the flaming pipeline so as to convey the first fuel gas and/or the second fuel gas to the flaming pipeline. The first fuel gas conveying device and the second fuel gas conveying device are used for conveying fuel gas into the two different conveying pipelines. The first fuel gas conveying device and the second fuel gas conveying device can work independently, so that two kinds of fuel gas do not need to be mixed before entering the conveying pipeline and independently advance after entering the conveying pipeline, functions can be achieved, and regulation and control are facilitated.

In order to prevent poisoning caused by gas leakage, the heating furnace 100 capable of simultaneously burning two gases further includes a gas leakage alarm device, the gas leakage alarm device is externally disposed at a communication position between the first gas conveying device and the gas pipeline, and the gas leakage alarm device may be a carbon monoxide alarm. The alarm threshold value of the carbon monoxide alarm instrument is set below the concentration safe to the human body, when the system leaks gas, the alarm can be given out at the first time, personnel are far away from the dangerous area, and a gas source head is isolated in a remote mode. Meanwhile, a gas leakage detection valve group can be arranged, so that the possibility of gas leakage of the heating furnace system can be monitored before the equipment is put into use, and if the possibility exists, the possibility can be prevented in advance; if not, the system can be safely put into operation.

In order to support combustion of the combustion device 40, the combustion device 40 further comprises an air pipeline, wherein the outlet end of the air pipeline is communicated with the flame spraying pipeline, so that air enters the combustion chamber 10 through the flame spraying pipeline, oxygen in the air can support combustion of flame, meanwhile, due to proper air introduction, coal gas can be combusted more thoroughly, and the fuel utilization rate is improved.

Further, in order to expand the adjustment range of the coal gas, the flame spraying pipeline comprises two branch pipelines which are connected in parallel; the combustion device further comprises a first regulating valve and a second regulating valve, wherein the first regulating valve and the second regulating valve are respectively arranged on the two branch pipelines so as to regulate the flow of the two branch pipelines to be different. Through parallelly connected two governing valves, for traditional single governing valve, the ability of adjusting the gas flow has very big improvement.

The coal gas of low calorific value can produce a large amount of flue gas when burning, and the flue gas carries out the heat transfer at the convection current cavity of heating furnace, as shown in fig. 2, the convection current cavity 230 of traditional heating furnace accounts for about one fifth of furnace body height, so set up, and the heat of a large amount of flue gas can not carry out the heat transfer effectively and will be discharged, has wasted a large amount of energy. And in this application, convection current chamber 30 highly be greater than the fifth of the height of furnace body, and be less than the third of the height of furnace body has suitably lengthened convection current chamber 30's length, can be effectively when the coal gas of low calorific value burns, the heat of reasonable utilization flue gas.

In order to transmit the heat of the combustion chamber 10 to the radiation chamber 20 more effectively, the furnace body further comprises a radiation column, the radiation column is correspondingly arranged at the pipe orifice of the flame spraying pipeline, the radiation column is arranged at the bottom of the combustion chamber 10 and extends upwards to the radiation chamber 20, so that the flame in the combustion chamber 10 heats the radiation column, and the radiation column can transmit the heat to the radiation chamber 20 in a heat radiation mode.

In order to collect the heat in the combustion chamber 10, the width of the combustion chamber 10 is smaller than that of the radiation chamber 20, and the reduction of the width can collect the flame and further the heat, and can prevent the phenomena of gas fire-off and flameout when burning low-calorific-value gas. On the other hand, reform transform traditional heating furnace into the heating furnace in this application and need weld a heat accumulation combustion chamber, the reduction of width can be directly with this combustion chamber weld between the stove leg of heating furnace, need not reform transform the stove leg again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A heating furnace capable of burning two kinds of gas simultaneously is characterized by comprising:

the furnace body comprises a combustion chamber, a radiation chamber and a convection chamber which are sequentially communicated from bottom to top; and the number of the first and second groups,

the combustion device comprises a flame spraying pipeline, and the flame spraying channel extends horizontally in the combustion chamber, so that when the combustion device works, heat generated by combustion extends horizontally and then extends upwards to be sequentially transferred to the radiation chamber and the convection chamber;

the width of the combustion chamber is less than the width of the radiation chamber;

the furnace body still includes the radiation post, the radiation post corresponds to be located the mouth of pipe department of flame projecting pipeline, the radiation post is located combustion chamber's bottom, and upwards extend to the radiation chamber to make the flame in the combustion chamber heat the radiation post, the radiation post passes through thermal radiation's mode with heat transfer extremely the radiation chamber.

2. The heating furnace capable of simultaneously combusting two kinds of gas as claimed in claim 1, wherein said combustion means is provided in plurality, and the flame projecting pipes of a plurality of said combustion means are dispersedly arranged on the side wall of said combustion chamber.

3. The heating furnace capable of combusting two kinds of gas simultaneously according to claim 2, wherein said combustion means is provided with four, and flame-throwing pipes of said four combustion means are arranged at intervals in a circumferential direction of said combustion chamber.

4. The furnace of claim 1, wherein the furnace is capable of combusting two gases simultaneously, and further comprises a first gas delivery device and a second gas delivery device, the first gas delivery device and the second gas delivery device being configured to deliver a first gas and a second gas, respectively;

5. The heating furnace capable of combusting two kinds of gas simultaneously according to claim 4, wherein the heating furnace capable of combusting two kinds of gas simultaneously further comprises a gas leakage alarm device, and the gas leakage alarm device is externally arranged at a position where the first gas conveying device and the second gas conveying device are communicated with the gas pipeline.

6. The furnace according to claim 4, wherein said combustion means further comprises an air conduit, an outlet end of said air conduit communicating with said flame conduit for allowing air to enter said combustion chamber through said flame conduit.

7. The furnace of claim 1, wherein the flaming pipe includes two branch pipes connected in parallel;

8. The heating furnace capable of simultaneously burning two kinds of gas as set forth in claim 1, wherein the height of said convection chamber is more than one fifth of the height of said furnace body and less than one third of the height of said furnace body.