Modularized combustion device of heat treatment furnace
By calculating the heating capacity of each burner and designing a modular combustion device, the problem of different specifications of heat treatment furnaces require different combustion devices is solved, and a unified heating capacity and stable flame are achieved, reducing costs and maintenance difficulties.
Patent Information
- Application Number
- CN202323499474.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-21
AI Technical Summary
Heat treatment furnaces of different specifications require combustion devices of different specifications, resulting in high spare parts costs and maintenance costs, and lack of a unified combustion device design suitable for multiple specifications of furnaces.
By calculating the heating capacity of each burner, a burner with a power adjustment ratio of 600kw is selected as the core, a modular combustion device is designed to form a fixed configuration of combustion device unit, including burner, gas channel and combustion air channel , use steel pipes and valve components to ensure the unity and stability of heating capacity.
It realizes the unified heating capacity of the combustion device, stabilizes the flame and uniform furnace temperature, reduces installation and maintenance difficulties, spare parts costs, and reduces operating costs.
Smart Images
Figure CN222186932U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of heat treatment furnaces, and in particular relates to a modular combustion device used in a heat treatment furnace. Background Art
[0002] According to the requirements of products and processes, heat treatment furnaces vary in furnace temperature, furnace loading, and size specifications. Each furnace should be equipped with a combustion device of appropriate specifications according to the above parameters to meet the requirements of product processes for heat supply and ensure stable combustion of the combustion device. This is determined by the performance of the combustion device and thermal calculations, and meets the design requirements of non-standard equipment. As a result of this design selection, different heat treatment furnaces use combustion devices of different specifications, which leads to high spare parts and maintenance costs for users. If different heat treatment furnaces use the same specification of combustion devices, and at the same time meet the requirements of process temperatures of heat treatment furnaces of different specifications for heat supply, and ensure stable combustion of the combustion device, the spare parts cost and maintenance cost of the factory will be minimized, which is convenient for on-site management. However, there is currently no relevant public introduction information on the use of a combustion device of the same specification for heat treatment furnaces of different specifications. Summary of the invention
[0003] The utility model provides a modular combustion device for a heat treatment furnace, which is suitable for heat treatment furnaces of various specifications.
[0004] 1. Calculate the heating capacity of a single burner of the heat treatment furnace, obtain the appropriate power of the burner, compare the power of each burner, and select the actual value and minimum value of the heating capacity of a single burner according to the adjustment ratio of the burner.
[0005] The actual heating capacity formula of a single burner in a furnace is as follows:
[0006] B=L×Qd÷D
[0007] B: Actual power of a single burner (kw)
[0008] L: Instantaneous flow rate of natural gas in the furnace (Nm 3 / s)
[0009] Qd: Natural gas low calorific value (35600kJ / m 3 )
[0010] D: Number of burners
[0011] The calculation formula for the minimum heating capacity of a single burner in a furnace is as follows:
[0012] Bmin=B÷T
[0013] Bmin: minimum burner power (kw)
[0014] B: Actual power of burner (kw)
[0015] T: Adjustment ratio
[0016] 2. Specific technical solutions of this utility model:
[0017] After calculation, a burner with a power of 600 kW and a regulation ratio of 1:20 was selected as the core of the combustion device to form a set of combustion device modules.
[0018] The rear part of the burner is connected to the gas channel, and the upper part of the burner is connected to the combustion-supporting air channel. The three parts are combined into a fixedly configured combustion device, forming a combustion device unit module; the main channel of the gas channel is composed of steel pipe Ⅰ and a high-fire gas valve and a high-fire quick-cut valve connected in series on steel pipe Ⅰ, and steel pipe Ⅰ is connected to the rear part of the burner; the secondary channel is parallel to the main channel, and is composed of a low-fire gas valve and a low-fire quick-cut valve connected in series on steel pipe Ⅰ, and the low-fire quick-cut valve is connected to steel pipe Ⅰ at the rear end of the high-fire quick-cut valve; the combustion-supporting air channel is composed of steel pipe Ⅱ and a quick-cut valve, a combustion-supporting air valve, and an expander connected in series upward on steel pipe Ⅱ, and steel pipe Ⅱ is connected to the upper part of the burner.
[0019] Innovations of this utility model:
[0020] According to the heating capacity of furnaces of different specifications, a larger burner is selected, the optimal power of the burner is determined, and the number and layout of the burners are optimized to form a modular combustion device unit with a fixed configuration, which can replace other combustion devices and meet the heating needs of heat treatment furnaces of various specifications.
[0021] The utility model has the advantages that:
[0022] The heating capacity of the combustion device is unified to 600KW, and it is modularly designed. The combustion system of the heat treatment furnace after the transformation has stable flame in actual use, good furnace temperature uniformity, good adjustability of the combustion device, easy operation, reduced installation and maintenance difficulty, saved spare parts costs, reduced capital occupation, and reduced operating costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic side view of the combustion device module;
[0024] Figure 2 This is a schematic front view of the combustion device module.
[0025] Explanation of icons: 1 burner, 2 gas channel, 3 combustion-supporting air channel, 4 steel pipe I, 5 low-fire gas valve, 6 high-fire gas valve, 7 high-fire quick-cut valve, 8 low-fire quick-cut valve, 9 combustion-supporting air valve, 10 expander, 11 quick-cut valve, 12 steel pipe II. DETAILED DESCRIPTION
[0026] Examples 1 to 6 all use modular combustion devices of heat treatment furnaces, such as Figure 1 As shown, the rear part of the burner (1) is connected to the gas channel (2), and the upper part of the burner (1) is connected to the combustion-supporting air channel (3). These three parts are combined into a fixed configuration combustion device unit module; the main channel of the gas channel (2) is composed of steel pipes (I) and a large fire gas valve (6) and a large fire quick cut-off valve (7) which are connected in series on the steel pipes (I) in sequence, and the steel pipes (I) are connected to the rear part of the burner (1); the secondary channel is parallel to the main channel, and is composed of a small fire gas valve (5) connected to the steel pipes (I) and a small fire quick cut-off valve (6) in series in sequence, and the small fire quick cut-off valve (6) is connected to the steel pipes (I) at the rear end of the large fire quick cut-off valve (7); as shown Figure 2 As shown, the combustion-supporting air channel (3) is composed of a steel pipe (2) and a quick-cut-off valve (10), a combustion-supporting air valve (11), and an expander (12) which are sequentially connected in series upward on the steel pipe (2) and the steel pipe (2) is connected to the upper part of the burner (1).
[0027] Embodiments 1 to 6 are 6 types of annealing furnaces. According to the specific technical scheme of the utility model, modular combustion devices for heat treatment furnaces are manufactured and installed. Gas and combustion-supporting air are mixed and burned through the combustion device to supply heat to the heat treatment furnace. After theoretical calculation, burners with suitable power and large adjustment ratio are selected for the gas heat treatment furnace to ensure stable combustion at low temperature of 600℃ and high temperature of 1150℃, and to ensure sufficient heating capacity for furnaces with loading capacity of 60t, 80t, 100t and 180t.
[0028] The practical application of this modular combustion device is shown in Table 1. After actual operation, the effect is good.
[0029] Table 1 Examples of application of combustion devices
[0030]
Claims
1. A modular combustion device for a heat treatment furnace, characterized in that: The modular combustion device uses a burner with a power of 600kw and a modulation ratio of 1:20 to form a set of modular combustion devices: the rear of the burner (1) of the modular combustion device is connected to the gas channel (2), and the upper part of the burner (1) is connected to the combustion-supporting air channel (3), and the three parts are combined into a fixed configuration combustion device; The main channel of the gas channel (2) is composed of steel pipes (I) (4), high-fire gas valves (6), and high-fire quick-cut valves (6) in series, connected to the rear of the burner (1); the secondary channel is composed of low-fire gas valves (5) and low-fire quick-cut valves (8) connected to steel pipes (I) (4), and the low-fire quick-cut valves (8) are connected to the rear end of the high-fire quick-cut valves (7); The combustion-supporting air channel (3) is composed of a steel pipe (II) (⑿), a quick shut-off valve (⑾), a combustion-supporting air valve (⑻), and an expander (⑽) connected in series upward, and the steel pipe (II) (⑿) is connected to the upper part of the burner (⑴).