CN219102981U

CN219102981U - Gas combustion device

Info

Publication number: CN219102981U
Application number: CN202223504845.3U
Authority: CN
Inventors: 张志晶; 聂晓飞
Original assignee: Shanxi Lu'an Group Zuoquan Fusheng Coal Industry Co ltd
Current assignee: Shanxi Lu'an Group Zuoquan Fusheng Coal Industry Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-30
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a gas combustion device, which comprises an air inlet assembly, wherein the air inlet assembly comprises a gas inlet pipeline and a gas mixing device, one end of the gas inlet pipeline is used for being communicated with a low-concentration gas source, the other end of the gas inlet pipeline is used for being communicated with a combustion chamber, and the gas mixing device is communicated with the gas inlet pipeline and is used for mixing conveying air with low-concentration gas; the combustion head is arranged on the gas inlet pipeline and positioned in the combustion chamber, and is a metal mesh type combustion head; the safety protection device is arranged on the gas inlet pipeline and used for preventing combustion tempering; and the combustion chamber is used for burning the mixed low-concentration gas. According to the gas combustion device provided by the utility model, the metal net type combustion head is arranged so that flame can only burn at the downstream of the combustion head and cannot enter the gas inlet pipeline through the combustion head, and the probability of occurrence of combustion tempering is greatly reduced. Meanwhile, the gas inlet pipeline is provided with a safety protection device, so that combustion backfire is effectively prevented, and combustion safety is further improved.

Description

Gas combustion device

Technical Field

The utility model relates to the technical field of gas combustion, in particular to a gas combustion device.

Background

Coal mine gas is a high-quality clean energy source and is also a greenhouse gas, and the greenhouse effect of the coal mine gas is 21 times of that of carbon dioxide. Generally, the gas with the concentration higher than 10% extracted from the coal mine is usually used for power generation, civil or industrial production, while the gas with the concentration lower than 10% is directly discharged into the air, so that not only is a great deal of greenhouse gas discharged, but also huge energy waste is caused.

In order to make full use of low-concentration gas while reducing pollution to the environment, low-concentration gas can be effectively utilized by the low-concentration gas combustion apparatus, but in the combustion process, it is very important to prevent combustion flashback to improve the safety of combustion. The metal fiber combustion head adopted in the prior art has the problems of low high temperature resistance and easy burning-through, and has certain potential safety hazard.

Therefore, how to provide a gas combustion device, which can improve the combustion backfire preventing performance and the combustion safety, is a technical problem that the skilled person needs to solve at present.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide a gas combustion apparatus that improves combustion flashback resistance and further improves combustion safety.

In order to achieve the above object, the present utility model provides the following technical solutions:

a gas combustion apparatus comprising:

the gas inlet assembly comprises a gas inlet pipeline and a gas mixing device, one end of the gas inlet pipeline is used for being communicated with a low-concentration gas source, the other end of the gas inlet pipeline is used for being communicated with a combustion chamber, and the gas mixing device is communicated with the gas inlet pipeline and is used for mixing conveying air and low-concentration gas;

the combustion head is arranged on the gas inlet pipeline and positioned in the combustion chamber, and the combustion head is a metal net type combustion head;

the safety protection device is arranged on the gas inlet pipeline and used for preventing combustion backfire;

and the low-concentration gas after being mixed is combusted in the combustion chamber.

Optionally, in the gas combustion device, the connection mode of the combustion head and the gas inlet pipeline is flange connection.

Optionally, in the above gas combustion apparatus, the safety protection device includes:

the manual valve is arranged on the gas inlet pipeline and is positioned at the downstream of the gas mixing equipment;

and the cut-off valve is arranged on the gas inlet pipeline and is positioned between the manual valve and the combustion chamber.

Optionally, in the above gas combustion apparatus, the shut-off valve is a pneumatic valve, and the number is two.

Optionally, in the gas combustion device, a gas regulating valve is disposed on the gas inlet pipe, and the gas regulating valve is located between the shut-off valve and the combustion chamber.

Optionally, in the gas combustion device, the gas combustion device further comprises a combustion improver pipeline, wherein one end of the combustion improver pipeline is connected with a combustion improver gas source, and the other end of the combustion improver pipeline is communicated with the combustion chamber.

Optionally, in the above gas combustion apparatus, a filter is provided on the gas inlet pipe, and the filter is provided between the manual valve and the shut-off valve.

Optionally, in the gas combustion device, a concentration measuring instrument, a flowmeter, a pressure sensor and a flame sensor are arranged on the gas inlet pipeline.

Optionally, in the above gas combustion apparatus, the concentration measuring instrument is located downstream of the gas mixing device, the flow meter is located between the filter and the shut-off valve, the pressure sensor is located between the flow meter and the shut-off valve, and the flame sensor is located in the combustion chamber.

Optionally, in the above gas combustion apparatus, a fan communicating pipe is provided on the gas inlet pipe, and is used for communicating with a fan, and the fan communicating pipe is provided on the gas inlet pipe and located at the upstream of the combustion head.

The utility model provides a gas combustion device, which comprises an air inlet assembly, a combustion head, a safety protection device and a combustion chamber, wherein the air inlet assembly comprises an air inlet pipeline and a gas mixing device, the air inlet pipeline is communicated with a gas source, low-concentration gas is conveyed along the gas inlet pipeline, and air is input through the gas mixing device to be diluted to a preset concentration and then flows through the combustion head to enter the combustion chamber for combustion. The combustion head is a metal net type combustion head, and the mixed low-concentration gas flows through the combustion head and is sprayed to the combustion chamber for combustion. The arrangement of the metal net type combustion head enables flame to burn only at the downstream of the combustion head, and the flame cannot enter the gas inlet pipeline through the combustion head, so that the probability of occurrence of combustion tempering is greatly reduced. Meanwhile, the gas inlet pipeline is provided with a safety protection device, so that the pipeline is cut off in time when combustion tempering occurs, the occurrence of the combustion tempering is effectively prevented, and the combustion safety is further improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a gas combustion apparatus according to an embodiment of the present utility model.

The meaning of the individual reference numerals in fig. 1 is as follows:

101 is a gas inlet pipeline, 102 is a gas mixing device, 103 is a concentration measuring instrument, 104 is a manual valve, 105 is a filter, 106 is a flow meter, 107 is a pressure sensor, 108 is a shut-off valve, 109 is a gas regulating valve, 110 is a combustion chamber, 111 is a combustion head, 112 is a fan communicating pipe, and 113 is a combustion improver pipeline.

Detailed Description

The core of the utility model is to provide a gas combustion device, which improves the combustion backfire preventing performance and the combustion safety.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the embodiment of the utility model discloses a gas combustion device, which comprises an air inlet assembly, a combustion head, a safety protection device and a combustion chamber.

The gas inlet assembly comprises a gas inlet pipeline 101 and a gas mixing device 102, wherein the gas inlet pipeline 101 is used for conveying low-concentration gas, one end of the gas inlet pipeline 101 is communicated with a low-concentration gas source, the other end of the gas inlet pipeline is communicated with the combustion chamber 110, and the low-concentration gas flows through the gas inlet pipeline 101 from the low-concentration gas source to enter the combustion chamber 110 for combustion.

The gas mixing device 102 is communicated with the gas inlet pipeline 101 and is used for diluting the low-concentration gas, so that the low-concentration gas enters the combustion chamber for combustion after being mixed to a preset concentration. Firstly, low-concentration gas (the concentration is 6% -30%) extracted from a gas source is conveyed to a gas mixing device 102 through a gas inlet pipeline 101, so that the gas and the air are uniformly mixed in the gas mixing device 102 and blended to a preset concentration. The gas mixing device 102 is a common device, and the specific type is not limited herein, as long as the effect of diluting the low-concentration gas can be satisfied.

The combustion head 111 is disposed on the gas inlet pipe 101 and located in the combustion chamber 110, and the combustion head 111 disclosed in the embodiment of the present utility model is a metal mesh type combustion head, that is, the combustion head 111 is composed of honeycomb metal meshes, and a channel through which low-concentration gas flows is formed between the metal meshes. The low-concentration gas flows through the combustion head 111 and then is sprayed out of the channel formed by the metal net, so that the turbulent low-concentration gas is rectified into stable advection gas to flow out and enter the combustion chamber 110 for combustion, a plurality of stable, uniform and thin conical laminar flow flames are formed on the combustion head 111 after ignition, and the uniformity control of the long flame combustion state and the complete combustion of the gas can be realized.

The metal mesh type combustion head plays a role in fire retarding for flames of the combustion chamber 110, when the flames pass through a narrow channel formed by the metal mesh, the diameters of the channels formed by the metal mesh are smaller, the flames can be automatically extinguished after being transmitted for a certain distance in the small channel, the flames of the combustion chamber 110 are prevented from entering the gas inlet pipeline 101 through the combustion head 111, the probability of occurrence of combustion tempering is greatly reduced under the conditions of occurrence of deflagration, flameout and the like, and the combustion safety of the gas combustion device is improved. The metal mesh of the metal mesh type combustion head is a high-temperature resistant metal mesh. It can be understood by those skilled in the art that the aperture of the channel formed by the metal mesh meets the requirement that flame can be automatically extinguished after propagating for a certain distance, meanwhile, the flow rate of low-concentration gas flowing through can be ensured to meet the requirement, the specific aperture size is set according to actual conditions, and the length of the metal mesh combustion head can meet the requirement that the flame propagates to the extinguishing distance on the metal mesh channel.

The safety protection device is arranged on the gas inlet pipeline 101, when combustion backfire occurs, the gas inlet pipeline 101 is cut off in time, flame is prevented from entering the gas inlet pipeline 101, low-concentration gas is ignited, and the combustion safety of the gas combustion device is further effectively ensured.

In the gas combustion device disclosed by the embodiment of the utility model, low-concentration gas is conveyed along the gas inlet pipeline 101, mixed with the input air to a preset concentration when passing through the gas mixing equipment 102, and then flows through the combustion head 111 to enter the combustion chamber 110 for combustion. The combustion head 111 is a metal mesh type combustion head, and the mixed low-concentration gas flows through the combustion head 111 and is injected into the combustion chamber 110 from the channel formed by the metal mesh for combustion. The metal mesh type combustion head enables flame to burn only at the downstream of the combustion head 111 and cannot enter the gas inlet pipeline 101 through the combustion head 111, so that the probability of occurrence of combustion tempering is greatly reduced. Meanwhile, the gas inlet pipeline 101 is provided with a safety protection device, so that the pipeline is cut off in time when combustion tempering occurs, the occurrence of the combustion tempering is effectively prevented, and the combustion safety is further improved.

In order to facilitate the assembly and disassembly of the burner 111, in an embodiment of the present utility model, the burner 111 is connected to the gas inlet pipe 101 by a flange.

In one embodiment of the present utility model, the safety protection device includes a manual valve 104 and a shut-off valve 108. The manual valve 104 is located downstream of the gas mixing apparatus 102, the manual valve 104 is in an off state before combustion, and when the low concentration gas is mixed to a preset concentration at the gas mixing apparatus 102, the manual valve 104 is in an on state, so that the low concentration gas is delivered to the combustion chamber 110 through the gas inlet pipe 101. When combustion flashback occurs, the manual valve 104 is closed, so that the pipeline of the gas inlet pipeline 101 is cut off, and flame is prevented from entering to ignite low-concentration gas. It should be noted that the specific valve type of the manual valve 104 may be a ball valve or a butterfly valve, and the specific type is not limited herein, so long as the quick pipe cutting is ensured.

The cut-off valve 108 is arranged on the gas inlet pipeline 101 and is positioned between the manual valve 104 and the combustion chamber 110, and when combustion flashback occurs, the cut-off valve 108 is closed, so that the gas inlet pipeline 101 is in a cut-off state, one side of flame is isolated from the gas inlet pipeline 101, and the flame is prevented from entering the gas inlet pipeline 101 to ignite low-concentration gas. It should be noted that, the shut-off valve 108 may be an electric valve or a pneumatic valve, so long as the quick shut-off pipeline can be realized to isolate the system and prevent occurrence of combustion flashback, the specific type is not limited herein, and those skilled in the art can specifically choose according to actual situations.

In order to further ensure that the shut-off valve 108 can shut off the gas inlet pipe 101 when a combustion flashback occurs, so that the flame is isolated from the gas inlet pipe 101, in a specific embodiment of the present utility model, the number of shut-off valves 108 is two, and when one shut-off valve 108 fails, the other shut-off valve 108 can perform a pipe shut-off, and the two shut-off valves 108 can be mutually complemented, thereby playing a role of double insurance. The safety protection device also comprises a water seal type fire-retarding explosion venting device, an automatic powder spraying explosion suppression device, an automatic explosion retarding device, an anti-reflux device and an emergency diffusing system.

In order to adjust the flow rate of the low-concentration gas, as shown in fig. 1, in an embodiment of the present utility model, a gas adjusting valve 109 is disposed on the gas inlet pipe 101, and the gas adjusting valve 109 is located between the shut-off valve 108 and the combustion chamber 110, so as to adjust the flow rate of the low-concentration gas. The valve opening of the gas regulating valve 109 is adjusted according to the flow rate of the low-concentration gas required. It will be appreciated by those skilled in the art that the type of the gas regulating valve 109 may be a butterfly valve, a ball valve, a pneumatic valve, or an electric valve, and the specific type thereof is not limited herein and may be selected according to practical situations.

The gas combustion device disclosed by the embodiment of the utility model further comprises a combustion improver pipeline 113, wherein one end of the combustion improver pipeline 113 is connected with a combustion-improving gas source, and the other end of the combustion improver pipeline 113 is communicated with the combustion chamber 110. The combustion-supporting gas enters the combustion chamber 110 through the combustion-supporting agent pipeline 113 and is used as combustion-supporting fire after being ignited, so as to play a role in supporting the combustion of the low-concentration gas. When the combustion equipment is started, the combustion chamber 110 is purged first, the combustible gas in the combustion chamber 110 is purged completely, the ignition system starts to work, the ignition needle is ignited first, and then the combustion-supporting gas is ignited. After the combustion-supporting gas is ignited, the cut-off valve 108 is opened, the gas regulating valve 109 is opened to an ignition angle, and finally the gas is ignited, and the ignition is successful. The combustion-supporting gas may be liquefied petroleum gas.

In order to filter impurities in the low-concentration gas, so that the low-concentration gas burns more fully, and meanwhile, the normal use of the valve and the equipment is protected, as shown in fig. 1, in a specific embodiment of the utility model, a filter 105 is arranged on a gas inlet pipeline 101, the filter 105 is arranged between a manual valve 104 and a cut-off valve 108, when the low-concentration gas is mixed to a preset concentration, the manual valve 104 is opened, the low-concentration gas firstly enters the filter 105 for filtering, and is conveyed to a combustion chamber 110 for burning after the impurities are filtered, and the filter 105 is arranged so that the availability of the low-concentration gas is higher and the low-concentration gas burns more fully. It should be noted that, the type of the filter 105 may be a Y-type filter or a basket type filter, and the specific type thereof is not limited herein, and may be selected by those skilled in the art according to actual needs.

In order to measure the concentration, flow rate and pressure of the low concentration gas in the gas inlet pipe 101, in an embodiment of the present utility model, a concentration measuring instrument 103, a flow meter 106 and a pressure sensor 107 are disposed on the gas inlet pipe 101. The concentration measuring instrument 103 is used for detecting the concentration of the low concentration gas in the gas inlet pipe 101, i.e. the concentration of methane in the low concentration gas, and determining whether the current low concentration gas is suitable for being conveyed to the combustion chamber 110 for combustion according to the concentration measured by the concentration measuring instrument 103. It should be noted that, the concentration measuring instrument 103 is a common concentration measuring device, and the specific structure and measuring principle thereof are not described herein. The flow meter 106 is used for measuring the flow rate of the low-concentration gas in the gas inlet pipe 101 and providing data support for adjusting the flow rate of the low-concentration gas entering the combustion chamber 110. Those skilled in the art will appreciate that the flow meter 106 is a commonly used device for measuring flow, the specific type of which is not limited, and may be selected by those skilled in the art according to actual needs. The pressure sensor 107 is used for measuring the pressure of the low-concentration gas in the gas inlet pipe 101, and checking whether the pressure of the low-concentration gas in the gas inlet pipe 101 is in a normal range or not according to the measured pressure value.

In order to detect the combustion condition of the flame in the combustion chamber 110, the gas combustion device disclosed in the embodiment of the utility model further comprises a flame sensor, wherein the flame sensor is used for detecting whether combustion-supporting fire is ignited or not and whether low-concentration gas combusted in the combustion chamber 110 is flameout or not, and when the combustion chamber 110 is flameout, the flame sensor gives an alarm and indicates a fault. It will be appreciated by those skilled in the art that the flame sensor is a commonly used sensor for detecting a fire source, and the specific operation principle thereof will not be described herein.

On the basis of the above embodiment, the concentration measuring instrument 103 is located downstream of the gas mixing device 102, after the low concentration gas is mixed at the gas mixing device 102, the low concentration gas flows through the concentration measuring instrument 103, the concentration of the low concentration gas after mixing is measured, and when the concentration reaches the preset concentration, the low concentration gas is conveyed to the combustion chamber 110 for combustion. The flowmeter 106 is positioned between the filter 105 and the cut-off valve 108, and the low-concentration gas is filtered by the filter 105 and then flows through the flowmeter 106 to measure the flow, so that the influence of the blockage of the flowmeter 106 caused by impurities in the low-concentration gas on the measurement result is avoided. A pressure sensor 107 is located between the flow meter 106 and the shut-off valve 108.

The flame sensor is located in the combustion chamber 110, and is used for detecting whether combustion-supporting fire is ignited or not, conveying low-concentration gas to the combustion chamber 110 for combustion after the combustion-supporting fire is ignited, and detecting whether flame in the combustion chamber 110 is extinguished or not, so as to provide an alarm for operation after flame extinction.

The utility model discloses a gas combustion device, a fan communicating pipe 112 is arranged on a gas inlet pipeline 101 and used for communicating a fan, the fan communicating pipe 112 is arranged on the gas inlet pipeline 101 and is positioned at the upstream of a combustion head 111, and the pipeline is used for distributing air. When the gas concentration of the gas inlet pipeline 101 is higher than 8%, the ignition system is started first, and after combustion is stable, the gas distribution fan is purged and started according to the concentration measured by the concentration measuring instrument 103 and the pressure monitored by the pressure sensor 107, so that the gas concentration is stable to 8% for combustion. When the gas concentration of the gas inlet pipeline 101 is 6% -8%, the fan communicating pipe 112 is cut off, the cut-off valve 108 and the gas regulating valve 109 of the gas inlet pipeline 101 are opened, and the ignition system works.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. A gas combustion apparatus comprising:

the gas inlet assembly comprises a gas inlet pipeline (101) and a gas mixing device (102), one end of the gas inlet pipeline (101) is used for being communicated with a low-concentration gas source, the other end of the gas inlet pipeline is used for being communicated with a combustion chamber (110), and the gas mixing device (102) is communicated with the gas inlet pipeline (101) and used for conveying air to be mixed with the low-concentration gas;

a combustion head (111) arranged on the gas inlet pipeline (101) and positioned in the combustion chamber (110), wherein the combustion head (111) is a metal mesh type combustion head;

the safety protection device is arranged on the gas inlet pipeline (101) and is used for preventing combustion backfire;

-a combustion chamber (110), wherein the mixed low-concentration gas is combusted in the combustion chamber (110).

2. A gas combustion device according to claim 1, characterized in that the connection between the burner head (111) and the gas inlet conduit (101) is a flange connection.

3. The gas combustion device according to claim 1, wherein the safety protection device comprises:

a manual valve (104) arranged on the gas inlet pipeline (101) and positioned downstream of the gas mixing device (102);

and a shut-off valve (108) which is arranged on the gas inlet pipeline (101) and is positioned between the manual valve (104) and the combustion chamber (110).

4. A gas combustion device according to claim 3, wherein the shut-off valve (108) is a pneumatic valve and the number is two.

5. The gas combustion device according to claim 4, characterized in that a gas regulating valve (109) is arranged on the gas inlet pipe (101), the gas regulating valve (109) being located between the shut-off valve (108) and the combustion chamber (110).

6. The gas combustion device according to claim 5, further comprising an oxidant conduit (113), one end of the oxidant conduit (113) being connected to a source of combustion gas and the other end being in communication with the combustion chamber (110).

7. The gas combustion device according to claim 5, characterized in that a filter (105) is arranged on the gas inlet pipe (101), the filter (105) being arranged between the manual valve (104) and the shut-off valve (108).

8. The gas combustion device according to claim 7, wherein a concentration measuring instrument (103), a flow meter (106), a pressure sensor (107) and a flame sensor are provided on the gas intake pipe (101).

9. The gas combustion device according to claim 8, wherein the concentration measuring instrument (103) is located downstream of the gas mixing apparatus (102), the flow meter (106) is located between the filter (105) and the shut-off valve (108), the pressure sensor (107) is located between the flow meter (106) and the shut-off valve (108), and the flame sensor is located within the combustion chamber (110).

10. The gas combustion device according to claim 9, wherein a fan communicating pipe (112) is provided on the gas inlet pipe (101) for communicating with a fan, the fan communicating pipe (112) being provided on the gas inlet pipe (101) upstream of the combustion head (111).