Coke oven top structure with heat insulation and heat preservation functions

Abstract

The utility model discloses a coke oven top structure with heat insulation and heat preservation functions, the coke oven top is provided with a heat insulation layer, and a coke oven vertical flue is arranged below the heat insulation layer; the heat insulation layer at least comprises a first cylinder brick layer and a second clay brick layer which are arranged in a stacked mode from top to bottom. A first nano heat insulation layer is arranged between the first cylinder brick layer and the second clay brick layer, a second nano heat insulation layer is arranged on one side, deviating from the first nano heat insulation layer, of the second clay brick layer, and a third nano heat insulation layer is arranged on the side surface of the vertical flue of the coke oven. According to the coke oven top structure designed by the utility model, the nanometer heat insulation materials are respectively constructed on the first cylinder brick layer and the second clay brick layer, and meanwhile, the nanometer heat insulation materials are also arranged on the side wall of the vertical flue of the observation hole, so that the surface of the oven body can be better sealed by utilizing the nanometer fine particles and compactness of the nanometer heat insulation materials; therefore, the problem of blow-by of smoke, tar and the like can be further prevented, and the purpose of heat insulation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat insulation and thermal preservation of coke oven bodies, in particular to a coke oven top structure with heat insulation and thermal preservation functions. Background Art

[0002] In order to further solve the problem of insufficient investment in the research and development of energy-saving and emission-reduction technologies and weak innovation capabilities, especially to support the innovation of some common key technologies with significant driving effects. On June 11, 2020, in order to further accelerate the transformation and upgrading of the coking industry, promote technological progress in the coking industry, improve the comprehensive utilization rate of resources and the level of energy conservation and environmental protection, and promote the high-quality development of the coking industry, the my country Coking Industry Association formulated the "Standardized Conditions for the Coking Industry" in accordance with relevant national laws, regulations and industrial policies. On January 6, 2021, the China Coking Industry Association formulated the "Outline of the 14th Five-Year Plan for the Development of the Coking Industry", proposing to further strengthen the research and development and promotion and application of key technologies, processes and equipment in the industry, and effectively reduce energy consumption, material consumption, water consumption and pollutant emissions.

[0003] In November 2021, the National Development and Reform Commission and other departments issued a notice on the release of the "Energy Efficiency Benchmark and Baseline Levels in Key Areas of High-Energy Consumption Industries (2021 Edition)", requiring the energy efficiency benchmark level of top-loading coke ovens to be 135kgce / t and the benchmark level of ramming coke ovens to be 140kgce / t. On January 30, 2022, the State Council issued the "Notice on the Comprehensive Work Plan for Energy Conservation and Emission Reduction during the 14th Five-Year Plan Period", focusing on industries such as steel, non-ferrous metals, building materials, petrochemicals, and chemical industry, promoting energy-saving transformation and in-depth treatment of pollutants, completing ultra-low emission transformation of 530 million tons of steel production capacity by 2025, and achieving ultra-low emissions for coal-fired boilers in key areas of air pollution prevention and control. During the 14th Five-Year Plan period, the energy consumption per unit of added value of industrial enterprises above designated size decreased by 13.5%, and the water consumption per 10,000 yuan of industrial added value decreased by 16%.

[0004] In June 2023, the Ministry of Ecology and Environment, together with the National Development and Reform Commission and the Ministry of Industry and Information Technology, jointly issued the "Opinions on Promoting the Implementation of Ultra-low Emissions in the Coking Industry", proposing that by the end of 2025, key areas will strive to complete the transformation of 60% of coking capacity; by the end of 2028, coking enterprises in key areas will basically complete the transformation, and the country will strive to complete the transformation of 80% of coking capacity. Under the premise of promoting various national and local policies and raising the entry threshold, the green development of my country's coal coking industry is in full swing. Combined with my country's development goals of carbon peak and carbon neutrality, my country will further promote the green development of the coking industry itself and reduce waste emissions in the coking industry. Against this background, my country's industry, including the coking industry, will accelerate the pace of upgrading and transformation of energy-saving and emission-reduction technologies, focusing on the application of new energy-saving and consumption-reducing technologies, transformation of high-energy-consuming general equipment, and efficient recycling of waste heat and pressure.

[0005] Under the background of achieving double carbon in energy conservation and emission reduction, the heat of the coke oven mainly comes from the flue gas after the combustion of the heating furnace gas, the heat taken away by the red coke, the heat taken away by the raw gas along the gas collecting pipe, and the heat lost on the surface of the furnace body. However, the first three types of heat have been recovered to a large extent through flue gas waste heat boilers, dry quenching, and raw gas riser waste heat recovery devices. At present, the heat loss of the furnace body is more difficult to solve. The current heat loss of the furnace body mainly comes from three parts: the furnace bottom area (including the basement), the furnace top area (including the water seal cover, the carbon removal hole cover, the riser base, the fire viewing hole cover) and the combustion chamber (including the small burner head and the furnace door). At present, solving the heat loss of the furnace body has become the most critical step in reducing heat loss. The utility model mainly makes technical improvements to the heat loss of the furnace top. Utility Model Content

[0006] The utility model aims to solve the problem that the coke oven top area is prone to heat loss by designing a coke oven top structure with heat insulation function.

[0007] The utility model is realized through the following technical solutions:

[0008] The utility model designs a coke oven roof structure with heat insulation function, wherein the coke oven roof has a heat insulation layer, and a coke oven vertical fireway is arranged below the heat insulation layer; the heat insulation layer at least comprises a first cylinder brick layer and a second clay brick layer stacked from top to bottom;

[0009] A first nanometer thermal insulation layer is arranged between the first cylinder brick layer and the second clay brick layer, a second nanometer thermal insulation layer is arranged on the side of the second clay brick layer away from the first nanometer thermal insulation layer, and a third nanometer thermal insulation layer is arranged on the side of the coke oven vertical fire channel.

[0010] Furthermore, a coke oven roof structure with heat insulation function: the heat insulation layer also includes a third clay hollow brick layer stacked below the second clay brick layer; the second nano heat insulation layer is arranged between the second clay brick layer and the third clay hollow brick layer.

[0011] Furthermore, a coke oven roof structure with heat insulation function: the coke oven roof structure also includes a heat reflective material layer, and the heat reflective material layer is arranged between the first cylinder brick layer and the first nano heat insulation layer.

[0012] Furthermore, a coke oven roof structure with heat insulation function: the coke oven roof structure also includes a special fiber material layer, and the special fiber material layer is arranged between the second clay brick layer and the second nano heat insulation layer.

[0013] Furthermore, a coke oven roof structure with heat insulation function: the thickness of the first nanometer heat insulation layer, the second nanometer heat insulation layer, and the third nanometer heat insulation layer are set to 5.0-10.0 mm respectively.

[0014] Furthermore, a coke oven roof structure with heat insulation function: the heat insulation coefficient of the nano heat insulation material is 0.03-0.05W / m·K.

[0015] At present, the coke oven roof is usually made of conventional insulation materials such as traditional heat-insulating clay bricks and floating bead bricks. The space on the roof is limited, and there are many thermal bridge joints between bricks, which makes the temperature of the roof space higher. Traditional insulation materials, such as heat-insulating clay bricks, have a thermal conductivity of about 0.8 to 1.2 W / m·K, floating bead bricks have a thermal conductivity of about 0.25 to 0.6 W / m·K, and fire mud has a thermal conductivity of about 0.5 to 0.7 W / m·K. At present, the temperature of the coke oven roof is generally around 95 to 110°C in summer and around 60 to 70°C in winter. The high temperature of the roof space poses a great challenge to the operating environment of maintenance vehicles and inspection personnel. At the same time, the heat in the coke oven is continuously released to the environment through the roof space, resulting in heat dissipation loss of the furnace body. The coke oven top structure designed by the utility model effectively reduces the heat dissipation loss of the coke oven top through the application of nano thermal insulation materials and special fiber materials, achieves the effect of furnace body insulation, and saves energy.

[0016] Beneficial effects of the utility model:

[0017] (1) The coke oven roof structure designed by the utility model is constructed by constructing a nano thermal insulation material with a thermal insulation coefficient of only 0.03-0.05 W / m·K on the first cylinder brick layer and the second clay brick layer, respectively, and a nano thermal insulation material with a thickness of several millimeters is also arranged on the side wall of the fire viewing hole and the vertical fire channel. The nano-scale fine particles and its density can better seal the furnace surface, thereby further preventing the leakage of smoke, tar, etc., and achieving the purpose of thermal insulation.

[0018] (2) In order to further improve the performance of the materials and further extend the life of the materials, the coke oven roof structure designed by the utility model also uses heat-reflective materials and flexible fiber materials, thereby reducing the friction between the materials and improving the contact thermal resistance. It can greatly enhance the thermal resistance of the entire furnace body, reduce heat loss, and achieve a further effect of thermal insulation.

[0019] (3) Before the transformation by the utility model, the temperature of the coke oven top in summer is generally around 95-110°C, and the temperature of the coke oven top in winter is around 60-70°C. After the transformation by the utility model, the temperature of the coke oven top in summer is generally around 55-75°C, and the temperature of the coke oven top in winter is around 35-40°C. It can be seen that the coke oven top structure designed by the utility model can effectively reduce the top temperature and reduce the heat loss in the top space. At the same time, the low temperature environment is conducive to the operation of the maintenance vehicle and the inspection staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a coke oven roof structure with heat insulation and heat preservation functions designed for the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged view of area A in the middle.

[0023] Markings in the figure: 1-coke oven roof, 2-insulation layer, 3-coke oven vertical fire channel, 4-first nano-insulation layer, 5-second nano-insulation layer, 6-third nano-insulation layer, 7-heat reflective material layer, 8-special fiber material layer, 21-first cylinder brick layer, 22-second clay brick layer. DETAILED DESCRIPTION

[0024] 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. 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.

[0025] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0026] Example 1

[0027] like Figures 1-2 As shown, a coke oven roof structure with heat insulation function is designed, wherein the coke oven roof 1 has a heat insulation layer 2, and a coke oven vertical fireway 3 is arranged below the heat insulation layer 2; the heat insulation layer 2 at least includes a first cylinder brick layer 21, a second clay brick layer 22 and a third clay hollow brick layer stacked from top to bottom;

[0028] A heat reflective material layer 7 and a first nano thermal insulation layer 4 with a thickness of 5.0 to 10.0 mm are sequentially arranged between the first cylinder brick layer 21 and the second clay brick layer 22, a special fiber material layer 8 and a second nano thermal insulation layer 5 with a thickness of 5.0 to 10.0 mm are sequentially arranged between the second clay brick layer 22 and the third clay hollow brick layer, and a third nano thermal insulation layer 6 with a thickness of 5.0 to 10.0 mm is arranged on the side of the coke oven vertical fire channel 3; wherein the thermal insulation coefficient of the nano thermal insulation material used in the first nano thermal insulation layer 4, the second nano thermal insulation layer 5 and the third nano thermal insulation layer 6 is 0.03 to 0.05 W / m·K.

[0029] The utility model constructs nano heat insulation materials with a heat insulation coefficient of only 0.03-0.05 W / m·K on the first cylinder brick layer 21 and the second clay brick layer 22 respectively with a thickness of several millimeters, and also arranges nano heat insulation materials with a thickness of several millimeters on the side walls of the fire viewing hole and the vertical fire channel. By utilizing the nano-scale fine particles and the density thereof, the furnace body surface can be better sealed, thereby further preventing the leakage of smoke, tar and the like, and achieving the purpose of heat insulation.

[0030] The above preferred embodiments of the utility model are only used to explain the utility model, and are not used to limit the utility model. Any obvious changes or modifications derived from the technical solution of the utility model are still within the protection scope of the utility model.

Claims

1. A coke oven roof structure with heat insulation function, characterized in that: The coke oven roof (1) has a heat insulation layer (2), and a coke oven vertical fireway (3) is arranged below the heat insulation layer (2); the heat insulation layer (2) comprises at least a first cylinder brick layer (21) and a second clay brick layer (22) which are stacked from top to bottom; A first nanometer heat insulation layer (4) is arranged between the first cylinder brick layer (21) and the second clay brick layer (22), a second nanometer heat insulation layer (5) is arranged on the side of the second clay brick layer (22) away from the first nanometer heat insulation layer (4), and a third nanometer heat insulation layer (6) is arranged on the side of the coke oven vertical fire channel (3).

2. The coke oven roof structure with heat insulation function according to claim 1, characterized in that: The heat insulation layer (2) further comprises a third clay hollow brick layer stacked below the second clay brick layer (22); The second nanometer heat-insulating layer (5) is arranged between the second clay brick layer (22) and the third clay hollow brick layer.

3. The coke oven roof structure with heat insulation function according to claim 1, characterized in that: The coke oven roof structure also includes a heat reflective material layer (7), and the heat reflective material layer (7) is arranged between the first cylinder brick layer (21) and the first nano heat insulation layer (4).

4. The coke oven roof structure with heat insulation function according to claim 1, characterized in that: The coke oven roof structure also includes a special fiber material layer (8), and the special fiber material layer (8) is arranged between the second clay brick layer (22) and the second nano heat insulation layer (5).

5. The coke oven roof structure with heat insulation function according to claim 1, characterized in that: The thicknesses of the first nanometer heat insulation layer (4), the second nanometer heat insulation layer (5), and the third nanometer heat insulation layer (6) are respectively set to 5.0 to 10.0 mm.

6. The coke oven roof structure with heat insulation function according to claim 1, characterized in that: The thermal insulation coefficient of the adopted nano thermal insulation material is 0.03-0.05W / m·K.

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