A waste heat recovery mechanism for dry quenching coke oven

Abstract

The utility model discloses a kind of waste heat recovery mechanisms of dry quenching coke oven, it is related to dry quenching coke oven technical field.The utility model includes dry quenching coke oven body, dry quenching coke oven body one side perimeter side is fixedly provided with flue gas outlet pipe and air inlet pipe, flue gas outlet pipe and air inlet pipe are all connected with dry quenching coke oven body inside, flue gas outlet pipe one end is equipped with filter smoke component, filter smoke component includes filter box, filter box inside is fixedly provided with filter smoke plate, several filter holes are arranged on the surface of filter smoke plate, filter smoke plate is divided into slag collection cavity and gas guide cavity by filter box, and the impurities filtered by filter smoke plate are collected by slag collection cavity.The utility model passes through the synergic effect of filter smoke component and gas conveying screw, significantly reduce the heat loss in the transmission process of high-temperature flue gas, improve waste heat recovery efficiency, while flue gas circulation machine converts the flue gas after purification into high-temperature water vapor and re-injects into dry quenching coke oven, realizes heat energy closed loop utilization, reduces external energy consumption and emission pollution.

Description

Technical Field

[0001] This utility model belongs to the field of dry quenching coke oven technology, and in particular relates to a waste heat recovery mechanism for a dry quenching coke oven. Background Technology

[0002] The coking industry is an important energy conversion industry for coal resource processing and utilization. In the 21st century, driven by the development of industries such as steel, the refining and chemical industry has achieved a qualitative leap. Coke quenching is an important step in the coke production process, and there are two types: wet quenching and dry quenching. Currently, dry quenching is mostly used to meet the requirements of environmental protection and energy conservation.

[0003] Existing dry quenching coke oven waste heat recovery systems suffer from insufficient recovery rates due to their simple flue structure and severe heat loss during high-temperature flue gas transport. Furthermore, the filter devices are prone to clogging by coke dust and impurities, requiring frequent shutdowns for cleaning. In addition, conventional flue gas recirculation equipment often relies on external energy sources for heat exchange, failing to achieve full closed-loop heat utilization and resulting in energy waste and increased carbon emissions. Therefore, we provide a waste heat recovery mechanism for dry quenching coke ovens to address these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a waste heat recovery mechanism for a dry quenching coke oven. Through the synergistic effect of the flue gas filter assembly and the gas conveying auger, the heat loss of high-temperature flue gas during the transmission process is significantly reduced, and the waste heat recovery efficiency is improved. At the same time, the flue gas recirculation machine converts the purified flue gas into high-temperature water vapor and re-injects it into the dry quenching coke oven, realizing closed-loop utilization of thermal energy, thereby solving the technical defects in the above-mentioned background technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a waste heat recovery mechanism for a dry quenching coke oven, including a dry quenching coke oven body. A smoke outlet pipe and an air inlet pipe are fixedly arranged on one side of the dry quenching coke oven body. The smoke outlet pipe and the air inlet pipe are both connected to the interior of the dry quenching coke oven body. A smoke filter assembly is installed at one end of the smoke outlet pipe.

[0006] The smoke filtration assembly includes a filter box, inside which a filter plate is fixedly installed. The surface of the filter plate has several filter holes. The filter plate divides the filter box into a slag collection chamber and a gas guiding chamber. The slag collection chamber collects the impurities filtered by the filter plate, and the filtered smoke is transported through the gas guiding chamber. A gas delivery channel is installed on one side of the filter box.

[0007] The present invention is further configured such that a one-way valve is installed inside both the flue pipe and the inlet pipe, so that the flue gas inside the dry quenching coke oven body can only be discharged from the flue pipe and the gas can only enter the dry quenching coke oven body from the inlet pipe.

[0008] The present invention is further configured such that a flue gas recirculator is installed on one side of the gas delivery channel, and the flue gas recirculator is connected to the gas delivery channel via a connecting pipe.

[0009] The present invention is further configured such that the flue gas recirculator is connected to the air inlet pipe via an L-shaped connecting pipe, and the flue gas released from the dry quenching coke oven body is converted into water vapor by the flue gas recirculator and re-enters the dry quenching coke oven body through the L-shaped connecting pipe.

[0010] The present invention is further configured such that an air conveying auger is installed inside the air conveying channel, which reduces the rate of heat loss in the flue gas, so that the heat is absorbed and utilized.

[0011] The present invention is further configured such that a servo motor is installed on the top of the filter box, and a positioning threaded rod fixedly connected to the output end of the servo motor is rotatably provided inside the air guide cavity;

[0012] A cleaning rod that is threadedly engaged with a positioning threaded rod is slidably provided on one side of the smoke filter plate, and a detachable cleaning brush is installed on the side of the cleaning rod near the smoke filter plate.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model significantly reduces heat loss of high-temperature flue gas during transmission and improves waste heat recovery efficiency through the synergistic effect of the flue gas filter assembly and the gas conveying auger. At the same time, the flue gas recirculation machine converts the purified flue gas into high-temperature water vapor and re-injects it into the dry quenching coke oven, realizing closed-loop utilization of thermal energy and reducing external energy consumption and emission pollution.

[0015] 2. This utility model uses an automatic cleaning mechanism driven by a servo motor to periodically remove slag from the surface of the filter plate, avoiding system efficiency reduction caused by blockage, reducing the frequency of manual maintenance, ensuring continuous and stable operation of the waste heat recovery process, and extending the service life of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the waste heat recovery mechanism of a dry quenching coke oven.

[0018] Figure 2 for Figure 1 Another structural diagram from a different angle.

[0019] Figure 3 for Figure 2 The left view of the structure.

[0020] Figure 4 for Figure 2 A structural sectional view.

[0021] Figure 5 for Figure 4 A schematic diagram of the structure at point A in the middle.

[0022] Figure 6 for Figure 4 The left view of the structure.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Dry quenching coke oven body, 2-Smoke outlet pipe, 3-Air inlet pipe, 4-Smoke filter assembly, 401-Filter box, 402-Smoke filter plate, 403-Servo motor, 404-Positioning threaded rod, 405-Cleaning rod, 5-Gas delivery channel, 6-One-way valve, 7-Flue gas recirculator, 8-Connecting pipe, 9-L-shaped connecting pipe, 10-Gas delivery auger. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 This utility model is a waste heat recovery mechanism for a dry quenching coke oven, including a dry quenching coke oven body 1. A smoke outlet pipe 2 and an air inlet pipe 3 are fixedly arranged on one side of the dry quenching coke oven body 1. Both the smoke outlet pipe 2 and the air inlet pipe 3 are connected to the inside of the dry quenching coke oven body 1. A smoke filter assembly 4 is installed at one end of the smoke outlet pipe 2.

[0027] Specifically, the smoke filter assembly 4 includes a filter box 401, inside which a filter plate 402 is fixedly installed. The surface of the filter plate 402 has several filter holes. The filter plate 402 divides the filter box 401 into a slag collection chamber and a gas guiding chamber. A discharge pipe connected to the bottom of the slag collection chamber is fixedly installed. The filter slag filtered by the filter plate 402 is discharged through the discharge pipe. The slag collection chamber collects the impurities filtered by the filter plate 402. The filtered flue gas is transported through the gas guiding chamber. A gas conveying channel 5 is installed on one side of the filter box 401.

[0028] Furthermore, both the flue gas outlet pipe 2 and the air inlet pipe 3 are equipped with one-way valves 6. The flue gas inside the dry quenching coke oven body 1 can only be discharged from the flue gas outlet pipe 2, and the gas can only enter the dry quenching coke oven body 1 from the air inlet pipe 3. The one-way valves 6 control the flue gas and gas to flow in one direction.

[0029] A flue gas recirculator 7 is installed on one side of the gas transmission channel 5. The flue gas recirculator 7 is connected to the gas transmission channel 5 through a connecting pipe 8. The flue gas recirculator 7 is connected to the air inlet pipe 3 through an L-shaped connecting pipe 9. The flue gas released from the dry quenching coke oven body 1 is converted into water vapor by the flue gas recirculator 7 and then re-enters the dry quenching coke oven body 1 through the L-shaped connecting pipe 9.

[0030] The flue gas recirculator 7 is used to receive the filtered high-temperature flue gas transmitted through the gas delivery channel 5, and convert it into high-temperature water vapor through heat exchange or a specific reaction to achieve effective heat energy recovery. The generated high-temperature water vapor is then transported back to the dry quenching coke oven body 1 through the L-shaped connecting pipe 9 to participate in the coke cooling or combustion process, reducing external energy consumption. The directional flow of flue gas is maintained by mechanical power (such as a fan), and the stability of the circulation path is ensured by the one-way valve 6. The flue gas recirculator 7 can be regarded as a customized integrated device. Its core function is based on the combination of existing heat recovery technology (such as heat exchangers) and circulating fans, and is optimized for the working conditions of dry quenching coke ovens to achieve efficient utilization of waste heat and system energy saving.

[0031] Furthermore, an air conveying auger 10 is installed inside the air conveying channel 5. The air conveying auger 10 reduces the rate of heat loss in the flue gas, allowing the heat to be absorbed and utilized, thus promoting heat recovery. A servo motor 403 is installed on the top of the filter box 401, and a positioning threaded rod 404 is fixedly connected to the output end of the servo motor 403 inside the air guide cavity.

[0032] A cleaning rod 405 is slidably provided on one side of the smoke filter plate 402, which is threadedly engaged with the positioning threaded rod 404. A detachable cleaning brush is installed on the side of the cleaning rod 405 near the smoke filter plate 402.

[0033] The working principle of this utility model is as follows: the high-temperature flue gas generated during the operation of the dry quenching coke oven body 1 is discharged through the flue gas outlet pipe 2. The one-way valve 6 ensures that the flue gas flows only in one direction along the flue gas outlet pipe 2. After the flue gas enters the filter box 401 of the filter assembly 4, it is filtered by the filter plate 402. Impurities are intercepted in the slag collection chamber. The purified flue gas enters the gas guiding chamber and is transmitted through the gas conveying channel 5. The flue gas is transmitted through the gas conveying auger 10, which prolongs the residence time of the flue gas to reduce heat loss and promote heat recovery.

[0034] Subsequently, the flue gas enters the flue gas recirculator 7 through the connecting pipe 8 for processing. After being converted into high-temperature water vapor, it returns to the inlet pipe 3 through the L-shaped connecting pipe 9. It is then controlled by the one-way valve 6 to re-enter the dry quenching coke oven body 1 for recycling. At the same time, the servo motor 403 drives the positioning threaded rod 404 to rotate, which in turn drives the cleaning rod 405 to move along the surface of the filter plate 402. The detachable cleaning brush removes the slag on the filter plate 402 to ensure filtration efficiency. This mechanism achieves efficient waste heat recovery and continuous and stable operation of the system through flue gas recirculation, waste heat slow release and automatic cleaning functions.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A waste heat recovery mechanism for a dry quenching coke oven, comprising a dry quenching coke oven body (1), characterized in that: A smoke outlet pipe (2) and an air inlet pipe (3) are fixedly installed on one side of the dry quenching coke oven body (1). The smoke outlet pipe (2) and the air inlet pipe (3) are both connected to the inside of the dry quenching coke oven body (1). A smoke filter assembly (4) is installed at one end of the smoke outlet pipe (2). The smoke filter assembly (4) includes a filter box (401), and a smoke filter plate (402) is fixedly installed inside the filter box (401). The surface of the smoke filter plate (402) is provided with a number of filter holes. The smoke filter plate (402) divides the filter box (401) into a slag collection chamber and a gas guiding chamber. The slag collection chamber collects the impurities filtered by the smoke filter plate (402), and the filtered smoke is transported through the gas guiding chamber. A gas delivery channel (5) is installed on one side of the filter box (401).

2. The waste heat recovery mechanism for a dry quenching coke oven according to claim 1, characterized in that, Both the flue gas outlet pipe (2) and the air inlet pipe (3) are equipped with one-way valves (6). The flue gas in the dry quenching coke oven body (1) can only be discharged from the flue gas outlet pipe (2), and the gas can only enter the dry quenching coke oven body (1) from the air inlet pipe (3).

3. The waste heat recovery mechanism for a dry quenching coke oven according to claim 2, characterized in that, A flue gas recirculator (7) is installed on one side of the gas transmission channel (5), and the flue gas recirculator (7) is connected to the gas transmission channel (5) through a connecting pipe (8).

4. The waste heat recovery mechanism for a dry quenching coke oven according to claim 3, characterized in that, The flue gas recirculator (7) is connected to the air inlet pipe (3) by an L-shaped connecting pipe (9). The flue gas released from the dry quenching coke oven body (1) is converted into water vapor by the flue gas recirculator (7) and then enters the dry quenching coke oven body (1) again through the L-shaped connecting pipe (9).

5. The waste heat recovery mechanism for a dry quenching coke oven according to claim 4, characterized in that, The gas delivery channel (5) is equipped with a gas delivery auger (10), which reduces the rate of heat loss in the flue gas and allows the heat to be absorbed and utilized.

6. The waste heat recovery mechanism for a dry quenching coke oven according to claim 5, characterized in that, A servo motor (403) is installed on the top of the filter box (401), and a positioning threaded rod (404) that is fixedly connected to the output end of the servo motor (403) is rotatably provided inside the air guide cavity; A cleaning rod (405) that is threadedly engaged with a positioning threaded rod (404) is slidably provided on one side of the smoke filter plate (402), and a detachable cleaning brush is installed on the side of the cleaning rod (405) near the smoke filter plate (402).

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