Low-nitrogen environment-friendly gas hot blast stove
By designing a low-nitrogen environmentally friendly gas hot air furnace including furnace body, furnace chamber, combustion machine, smoke collection chamber, flue gas channel, air preheater and smoke exhaust channel, the nitrogen oxides during the combustion process of traditional gas hot air furnaces are solved. High emissions, low combustion efficiency, large heat energy loss and improper flue gas treatment have achieved efficient and environmentally friendly combustion and heat energy utilization.
Patent Information
- Application Number
- CN202420216888.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-01-30
AI Technical Summary
During the combustion process, traditional gas hot air furnaces have problems such as high nitrogen oxide emissions, low combustion efficiency, large heat energy losses and improper flue gas treatment, resulting in increased environmental pollution and corporate operating costs.
A low-nitrogen environmentally friendly gas hot air furnace is designed, including furnace body, furnace chamber, combustion machine, smoke collection chamber, flue gas passage, air preheater and smoke exhaust passage. By optimizing the combustion structure and furnace design, the combustion efficiency is improved; through multiple heat exchanges and waste heat recovery, the thermal efficiency is improved; through the design of air preheaters and smoke exhaust channels, harmful substances in the flue gas are removed.
It significantly reduces the emission of nitrogen oxides, improves combustion efficiency and thermal efficiency, ensures that the emitted flue gas meets environmental protection requirements, and reduces production costs.
Smart Images
Figure CN222527947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot blast furnaces, in particular to a low-nitrogen environmentally friendly gas hot blast furnace. Background Art
[0002] With the continuous advancement of industrial technology and the strengthening of environmental awareness, gas hot blast furnaces, as important equipment for heat energy supply, have been widely used in various industries. However, traditional gas hot blast furnaces often have some problems in the combustion process, such as high nitrogen oxide emissions, low combustion efficiency, large heat energy loss, and improper flue gas treatment. These problems not only cause serious pollution to the environment, but also increase the operating costs of enterprises.
[0003] First, traditional gas hot blast furnaces produce a large amount of nitrogen oxides during the combustion process, which is one of the main sources of air pollution and acid rain, seriously endangering human health and the ecological environment. Therefore, reducing the emission of nitrogen oxides has become an important direction for the current improvement of gas hot blast furnace technology.
[0004] Secondly, the combustion efficiency of traditional gas hot blast furnaces is often low, and the fuel is not fully burned, resulting in energy waste. At the same time, due to unreasonable furnace structure design or inadequate insulation measures, heat energy loss is large, further reducing the thermal efficiency of the hot blast furnace.
[0005] In addition, traditional gas hot blast furnaces also have shortcomings in flue gas treatment. Flue gas often contains a large amount of harmful substances and waste heat. If it is directly discharged without effective treatment, it will not only pollute the environment, but also waste precious thermal energy resources. Utility Model Content
[0006] The purpose of the utility model is to provide a low-nitrogen environmentally friendly gas hot blast furnace to solve the problems often existing in the combustion process of the traditional gas hot blast furnace proposed in the above background technology, such as high nitrogen oxide emissions, low combustion efficiency, large heat energy loss and improper flue gas treatment, etc. These problems not only cause serious pollution to the environment, but also increase the operating costs of the enterprise.
[0007] To achieve the above-mentioned objectives, the utility model provides a low-nitrogen environmentally friendly gas hot air furnace, comprising a furnace body, a furnace chamber is arranged on one side of the interior of the furnace body, a burner is installed on one end of the furnace body, a smoke collecting chamber is arranged on the other side of the interior of the furnace body, one end of the smoke collecting chamber is connected to a smoke channel, one end of the smoke channel is connected to a smoke bin through a smoke outlet, one side of the smoke bin is connected to an air preheater, one end of the air preheater is connected to a smoke exhaust channel, one side of the air preheater is arranged with an air inlet, one end of the bottom of the air inlet is connected to a cold air channel, one end of the cold air channel is connected to a hot air channel through a conveying channel, and one side of the hot air channel is arranged with a hot air outlet.
[0008] Preferably, the inner wall of the furnace is provided with a refractory layer.
[0009] Preferably, a fire retaining wall is provided between the furnace and the smoke collecting chamber, and a plurality of smoke holes are provided on the surface of the fire retaining wall.
[0010] Preferably, a smoke exhaust port is provided at the top of the smoke exhaust channel.
[0011] Preferably, one side of the smoke exhaust channel is connected to the air inlet of the burner through a waste heat pipeline.
[0012] Preferably, a base is installed at the bottom of the furnace body.
[0013] Preferably, a control cabinet is disposed outside the furnace body.
[0014] Preferably, the smoke channel is located between the hot air channel and the cold air channel.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] In this low-nitrogen environmentally friendly gas hot blast furnace, first of all, during the combustion process, the emission of nitrogen oxides is successfully reduced, which significantly reduces the pollution to the atmosphere and meets the current strict environmental protection standards. Secondly, the combustion structure and furnace design are optimized so that the fuel can be burned more fully, thereby improving the combustion efficiency and reducing energy waste. Through the flue gas transportation design, multiple heat exchanges are carried out to improve the efficiency of heat exchange. At the same time, by setting up structures such as air preheaters and flue gas channels, the recovery and utilization of flue gas waste heat is realized, which further improves the thermal efficiency of the hot blast furnace and reduces production costs. Harmful substances in the flue gas are effectively removed, ensuring that the discharged flue gas meets environmental protection requirements and avoiding secondary pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the internal structure of the utility model;
[0018] Figure 2 It is a schematic diagram of the top view structure of the utility model;
[0019] Figure 3 It is a side structural schematic diagram of the utility model.
[0020] The meaning of each number in the figure is:
[0021] 1. Furnace body; 2. Furnace; 21. Refractory layer; 3. Burner; 4. Smoke collection chamber; 41. Fire retaining wall; 5. Smoke duct; 51. Smoke outlet; 6. Smoke bin; 7. Air preheater; 71. Air inlet; 8. Smoke exhaust duct; 9. Cold air duct; 10. Conveyor duct; 11. Hot air duct; 111. Hot air outlet; 12. Waste heat pipeline; 13. Base; 14. Control cabinet. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] The utility model provides a low-nitrogen environmentally friendly gas hot air furnace, such as Figure 1-Figure 3 As shown, it includes a furnace body 1, a furnace 2 is provided on one side of the interior of the furnace body 1, a burner 3 is installed on one end of the furnace body 1, a smoke collecting chamber 4 is provided on the other side of the interior of the furnace body 1, one end of the smoke collecting chamber 4 is connected to a smoke channel 5, one end of the smoke channel 5 is connected to a smoke bin 6 through a smoke outlet 51, one side of the smoke bin 6 is connected to an air preheater 7, one end of the air preheater 7 is connected to a smoke exhaust channel 8, one side of the air preheater 7 is provided with an air inlet 71, one end of the bottom of the air inlet 71 is connected to a cold air channel 9, one end of the cold air channel 9 is connected to a hot air channel 11 through a conveying channel 10, and one side of the hot air channel 11 is provided with a hot air outlet 111.
[0024] In this embodiment, the inner wall of the furnace 2 is provided with a refractory layer 21, and the refractory layer 21 is made of silicon brick material to achieve a good refractory effect.
[0025] Specifically, a fire-blocking wall 41 is provided between the furnace 2 and the smoke collecting chamber 4 , and a plurality of smoke holes are provided on the surface of the fire-blocking wall 41 to block the flame and facilitate the passage of smoke.
[0026] Furthermore, a smoke exhaust port is provided at the top of the smoke exhaust channel 8 for exhausting smoke.
[0027] Furthermore, one side of the smoke exhaust passage 8 is connected to the air inlet of the burner 3 through a waste heat pipeline 12 , so as to utilize the waste heat air of the smoke for combustion of the burner 3 .
[0028] Furthermore, a base 13 is installed at the bottom of the furnace body 1 for supporting the bottom of the furnace body 1 .
[0029] Furthermore, a control cabinet 14 is disposed outside the furnace body 1 for controlling the operation of various devices of the furnace body 1 .
[0030] Furthermore, the smoke channel 5 is located between the hot air channel 11 and the cold air channel 9, so as to facilitate sufficient heat exchange with the hot air channel 11 and the cold air channel 9 and improve the heat exchange efficiency.
[0031] When the low-nitrogen environmentally friendly gas hot blast furnace of the utility model is in use, the gas is first burned through the burner 3 to generate high-temperature flue gas, and then the high-temperature flue gas is introduced into the furnace 2 to increase the temperature in the furnace 2. The inner wall of the furnace 2 is provided with a refractory layer 21 made of silicon brick material, which can withstand high temperatures and protect the structure of the furnace 2 from damage. At the same time, a fire baffle 41 is provided between the furnace 2 and the smoke collecting chamber 4, and a smoke hole is provided on the fire baffle 41, which can prevent the flame from directly impacting the smoke collecting chamber 4 and allow the smoke to pass through. During the combustion process, the gas is fully mixed with the air and burned in the burner. The generated high-temperature flue gas is heated by the furnace 2 and enters the smoke collecting chamber 4. In the smoke collecting chamber 4, the smoke then enters the smoke bin 6 through the smoke channel 5. When the smoke passes through the smoke channel 5, the air in the hot air channel 11 and the cold air channel 9 is heated on both sides respectively. Finally, through the heat exchange of the air preheater 7, the heat energy is transferred to the cold air entering the air preheater 7. The external cold air is first heated by the air preheater 7, and then heated twice by the cold air channel 9. Finally, after being heated three times by the hot air channel 11, it is discharged through the hot air outlet 111, thereby achieving sufficient heating of the air and improving the heat exchange efficiency.
[0032] At the same time, the exhaust channel discharges the flue gas after heat exchange out of the furnace body, keeping the flue gas flowing smoothly in the furnace body. One side of the exhaust channel is connected to the air inlet of the burner through the waste heat pipeline, recycling part of the waste heat of the flue gas and improving the thermal energy utilization efficiency.
[0033] During the entire working process, the control cabinet accurately controls each device of the furnace body, monitors the operating status of the furnace body, and adjusts the gas and air supply of the burner as needed to maintain stable temperature in the furnace body and stable hot air quality.
[0034] Finally, it should be noted that the electronic components of the air preheater 7 and the like in this embodiment are all universal standard parts or parts known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components are connected by wires respectively, and the specific connection means should refer to the working sequence between the electrical components in the above-mentioned working principle to complete the electrical connection, which are all well-known technologies in the art.
[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A low-nitrogen environmentally friendly gas hot blast furnace, comprising a furnace body (1), characterized in that: A furnace (2) is provided on one side of the interior of the furnace body (1), a burner (3) is installed on one end of the furnace body (1), a smoke collecting chamber (4) is provided on the other side of the interior of the furnace body (1), one end of the smoke collecting chamber (4) is connected to a smoke channel (5), one end of the smoke channel (5) is connected to a smoke bin (6) via a smoke outlet (51), one side of the smoke bin (6) is connected to an air preheater (7), one end of the air preheater (7) is connected to a smoke exhaust channel (8), one side of the air preheater (7) is provided with an air inlet (71), one end of the bottom of the air inlet (71) is connected to a cold air channel (9), one end of the cold air channel (9) is connected to a hot air channel (11) via a conveying channel (10), and one side of the hot air channel (11) is provided with a hot air outlet (111); A fire baffle wall (41) is provided between the furnace (2) and the smoke collecting chamber (4), and a plurality of smoke holes are provided on the surface of the fire baffle wall (41); The top of the smoke exhaust channel (8) is provided with a smoke exhaust port; One side of the smoke exhaust channel (8) is connected to the air inlet of the burner (3) through a waste heat pipeline (12).
2. The low-nitrogen environmentally friendly gas hot blast furnace according to claim 1, characterized in that: The inner wall of the furnace (2) is provided with a refractory layer (21).
3. The low-nitrogen environmentally friendly gas hot blast furnace according to claim 1, characterized in that: A base (13) is installed at the bottom of the furnace body (1).
4. The low-nitrogen environmentally friendly gas hot blast furnace according to claim 1, characterized in that: A control cabinet (14) is arranged outside the furnace body (1).
5. The low-nitrogen environmentally friendly gas hot blast furnace according to claim 1, characterized in that: The smoke channel (5) is located between the hot air channel (11) and the cold air channel (9).