Afterburning system of vertical heat recovery coke electricity waste heat boiler

Abstract

The utility model discloses a vertical heat recovery coke-electricity waste heat boiler afterburning system which comprises a vertical heat recovery coke oven and a waste heat boiler, and further comprises a connecting flue and a fan, the two ends of the connecting flue are connected with a flue gas outlet of the vertical heat recovery coke oven and a flue gas inlet of the waste heat boiler respectively, and the fan is connected with the vertical heat recovery coke oven and the waste heat boiler. An air supplementing hole is formed in the connecting flue, and the fan is used for conveying air into the air supplementing hole. According to the utility model, the afterburning system is additionally arranged before the flue gas enters the waste heat boiler, namely, the connecting flue is arranged to connect the vertical heat recovery coke oven and the waste heat boiler, and the air required by the combustion of the combustible gas is supplemented into the connecting flue through the fan, so that the heat carried by the combustible gas in the waste gas of the vertical heat recovery coke oven can be recycled. Meanwhile, corrosive gas in the waste gas is treated, corrosion to the heating surface of the waste heat boiler is avoided, and pipe explosion and leakage are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler supplementary combustion technical field, concretely relates to a vertical heat recovery coke electric residual heat boiler supplementary combustion system. BACKGROUND

[0002] Vertical heat recovery coke oven is a coke production device with coke oven carbonization chamber micro negative pressure operation, mechanized ramming, coal charging, coke discharging and recycling and utilization of coking combustion waste gas residual heat, mainly used for producing foundry coke.

[0003] The vertical heat recovery coke oven produces waste gas containing a certain concentration of combustible gas CH4, CO and H2S due to process reasons, which will cause serious corrosion to the pressure-bearing elements of the residual heat boiler if directly used in the residual heat boiler. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a vertical heat recovery coke electric residual heat boiler supplementary combustion system to solve the problems mentioned in the background.

[0005] To solve the above technical problems, the utility model provides a vertical heat recovery coke electric residual heat boiler supplementary combustion system, which comprises a vertical heat recovery coke oven and a residual heat boiler, further comprises a connecting flue and a fan, both ends of the connecting flue are connected with a flue gas outlet of the vertical heat recovery coke oven and a flue gas inlet of the residual heat boiler respectively, a supplementary air hole is formed on the connecting flue, and the fan is used to send air to the supplementary air hole.

[0006] Further, the number of the supplementary air holes is multiple.

[0007] Further, the fan is used to send air to the hearth of the residual heat boiler.

[0008] Further, the flue gas outlet of the residual heat boiler is connected with an external chimney.

[0009] Further, a damper is arranged between the residual heat boiler and the connecting flue.

[0010] Further, a flue gas analyzer is arranged on the connecting flue.

[0011] The utility model has the advantages that the utility model adds a supplementary combustion system before flue gas enters the residual heat boiler, i.e. connecting the vertical heat recovery coke oven and the residual heat boiler through a connecting flue, and sending air required for combustion of combustible gas in the connecting flue through a fan, so that the heat of the combustible gas in the waste gas of the vertical heat recovery coke oven can be recycled and utilized. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structural schematic diagram of the embodiment of the utility model.

[0013] Wherein: 1, vertical heat recovery coke oven; 2, connecting flue; 3, waste heat boiler; 4, fan; 5, chimney; 6, air door; 7, air supply main pipe; 8, air supply branch pipe. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model, and obviously, the described embodiment is only one embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0015] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0016] In the following description, the reference of "one embodiment", "an embodiment", "one example", "an example" and the like indicates that the embodiment or example so described can include a particular feature, structure, characteristic, property, element or limitation, but not every embodiment or example necessarily includes the particular feature, structure, characteristic, property, element or limitation. In addition, the repeated use of the phrase "according to an embodiment of the present application" does not necessarily refer to the same embodiment, although it can.

[0017] As Figure 1 shown, the utility model discloses a kind of vertical heat recovery coke electric afterheat boiler supplementary combustion system, it includes vertical heat recovery coke oven and waste heat boiler, it further includes connecting flue and fan. The flue of connecting is connected with the flue gas outlet of vertical heat recovery coke oven and the flue gas inlet of waste heat boiler respectively, and supplementary air hole is opened on connecting flue, and fan is used to transport air in supplementary air hole.

[0018] In industrial production process, vertical heat recovery coke oven can produce a large amount of waste gas, and the generated waste gas contains a certain concentration of combustible gas mainly with CH4, CO, H2S, while these waste gases contain rich heat energy. The system connects the flue gas outlet of vertical heat recovery coke oven with the flue gas inlet of waste heat boiler through connecting flue, so that waste gas can smoothly enter waste heat boiler. At the same time, before the flue gas enters waste heat boiler, the supplementary combustion system sprays a proper amount of air into the flue gas in connecting flue through supplementary air hole, which can ignite the combustible components therein.

[0019] By burning toxic and corrosive gases in the flue gas and converting them into harmless or less harmful substances, pollutant emissions are reduced. This design further increases flue gas temperature and thermal efficiency, enabling more stable operation of the waste heat boiler. Furthermore, it reduces corrosion and wear on the boiler's heating surfaces caused by corrosive gases in the flue gas, preventing tube bursts and leaks and extending the waste heat boiler's service life.

[0020] This utility model adds a supplementary combustion system before the flue gas enters the waste heat boiler. Specifically, a connecting flue is provided to connect the vertical heat recovery coke oven and the waste heat boiler. A fan is used to supply the connecting flue with air required for combustion of the combustible gases. This allows the heat carried by the combustible gases in the exhaust gas of the vertical heat recovery coke oven to be recovered and utilized. At the same time, the corrosive gases in the exhaust gas are treated to prevent corrosion of the heating surface of the waste heat boiler, which could lead to pipe bursts and leaks.

[0021] In one embodiment, the number of supplementary air holes is multiple. Multiple supplementary air holes can ensure that the combustible components in the flue gas are burned more fully. The increase in the number of supplementary air holes makes the air distribution more uniform and the combustion reaction more complete, thereby improving the combustion efficiency. More complete combustion means that the heat energy in the flue gas is released more fully. This heat energy can be more effectively absorbed and utilized by the waste heat boiler, thereby improving the heat energy recovery rate. In addition, the emission of pollutants in the flue gas can also be reduced. After the combustible components are completely burned, the amount of pollutants generated will be significantly reduced, which helps to protect the environment. At the same time, when an air hole is blocked or fails, the other air holes can still work normally to ensure the continuity and stability of the combustion process.

[0022] In actual applications, the number and layout of supplementary air holes can be determined based on specific production requirements and process conditions. For example, in situations where the flue gas flow is large or the combustion reaction is more intense, the number of supplementary air holes may need to be increased to ensure the stability and efficiency of the combustion process.

[0023] In one embodiment, a fan is used to deliver air to the furnace of the waste heat boiler. Specifically, a main air supply pipe and several branch air supply pipes are provided. The air inlet of the main air supply pipe is connected to the air outlet of the fan, and the air outlet pipes of the main air supply pipe are respectively connected to the air inlets of the several branch air supply pipes. The air outlets of the several branch air supply pipes are connected to several supplementary air holes and the air inlet of the waste heat boiler furnace. Using a single fan as a unified air source can reduce system fluctuations caused by asynchronous operation or failure of multiple fans, helping to maintain stable operation of the waste heat boiler and the connecting flue.

[0024] This design provides ample oxygen for the combustion process in the waste heat boiler. This helps the combustible materials burn more completely, releasing more heat energy. At the same time, it simplifies the system structure, reduces the amount of equipment and maintenance costs.

[0025] In one embodiment, the flue gas outlet of the waste heat boiler is connected with an external chimney.

[0026] In one embodiment, a damper is arranged between the waste heat boiler and the connecting flue. According to actual production needs, the opening of the damper is adjusted to regulate the flue gas flow into the waste heat boiler.

[0027] In one embodiment, a flue gas analyzer is arranged on the connecting flue to measure the content of combustible gas in the burned gas in real time. According to the gas component data obtained by online detection, the air entering the connecting flue can be controlled by adjusting the speed of the fan, thereby further ensuring the safety and stability of the waste heat boiler.

[0028] The design idea of the utility model is as follows:

[0029] In this embodiment, a connecting flue is arranged between the vertical heat recovery coke oven and the waste heat boiler, a damper is arranged between the connecting flue and the waste heat boiler, a plurality of supplementary air holes are opened on the connecting flue, and the flue gas outlet of the waste heat boiler is connected with a chimney. A fan is arranged outside to send air to the furnace of the connecting flue and the waste heat boiler through a total air supply pipe and a plurality of air supply branch pipes.

[0030] That is, in the industrial production process, the vertical heat recovery coke oven will generate a large amount of waste gas containing a certain concentration of combustible gas mainly in the form of CH4, CO and H2S. Before the flue gas enters the waste heat boiler, a supplementary combustion system is arranged, that is, the fan sprays a proper amount of air into the flue gas in the connecting flue through the supplementary air holes, which can ignite the combustible components therein. Two to three groups of supplementary air points can be used. By burning the toxic and corrosive gases in the flue gas, the toxic and corrosive gases are converted into harmless or low-hazard substances, thereby reducing the emission of pollutants and improving the safety and stability of the waste heat boiler. According to actual production needs, the opening of the damper is adjusted to regulate the flue gas flow into the waste heat boiler. At the same time, the fan sends air to the waste heat boiler, providing sufficient oxygen for the combustion process in the waste heat boiler. The flue gas after combustion in the waste heat boiler is discharged through the chimney.

[0031] In the actual production process, a flue gas analyzer can also be arranged on the connecting flue to measure the content of combustible gas in the burned gas in real time. According to the gas component data obtained by online detection, the air entering the connecting flue can be controlled by adjusting the speed of the fan, thereby further ensuring the safety and stability of the waste heat boiler.

[0032] The utility model increases a supplementary combustion system before the flue gas enters the waste heat boiler, that is, a connecting flue is arranged to connect the vertical heat recovery coke oven and the waste heat boiler, and the fan supplements the air required for the combustion of the combustible gas in the connecting flue, so that the heat of the combustible gas in the waste gas of the vertical heat recovery coke oven can be recycled. At the same time, the corrosive gas in the waste gas is treated to avoid corrosion of the heating surface of the waste heat boiler and pipe leakage.

[0033] The above description of disclosed embodiments is sufficient to enable one of ordinary skill in the art to make and use the application. Modifications of these embodiments will be obvious to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertical heat recovery coke oven and waste heat boiler supplementary combustion system, comprising a vertical heat recovery coke oven and a waste heat boiler, characterized in that: It also includes a connecting flue and a fan, the two ends of the connecting flue are respectively connected to the flue gas outlet of the vertical heat recovery coke oven and the flue gas inlet of the waste heat boiler, and a supplementary air hole is opened on the connecting flue, and the fan is used to transport air to the supplementary air hole.

2. The vertical heat recovery coke power waste heat boiler supplementary combustion system according to claim 1 is characterized by: There are multiple air supply holes.

3. The vertical heat recovery coke power waste heat boiler supplementary combustion system according to claim 1 is characterized in that: The fan is used to transport air into the furnace of the waste heat boiler.

4. The vertical heat recovery coke power waste heat boiler supplementary combustion system according to claim 1 is characterized in that: The flue gas outlet of the waste heat boiler is connected to an external chimney.

5. The vertical heat recovery coke power waste heat boiler supplementary combustion system according to claim 1 is characterized in that: An air damper is provided between the waste heat boiler and the connecting flue.

6. The vertical heat recovery coke power waste heat boiler supplementary combustion system according to claim 1, characterized in that: A flue gas analysis instrument is provided on the connecting flue.

Images